Remove esan.

[thakis]

Summary

It hasn't seen active development in years, and it hasn't reached a state where it was useful.

Remove the code until someone is interested in working on it again.

[thakis]

more

[krytarowski]

How about DFSan and shadowcallstack?

[thakis]

In D59133#1422851, @krytarowski wrote:

How about DFSan and shadowcallstack?

I don't understand how that question is related to this change. What do you mean?

[krytarowski]

In D59133#1422906, @thakis wrote:

In D59133#1422851, @krytarowski wrote:

How about DFSan and shadowcallstack?

I don't understand how that question is related to this change. What do you mean?

shadowcallstack still misses even runtime.

DFSan seems to be unmaintained.

Are they planned to be dropped?

[cryptoad]

In D59133#1422951, @krytarowski wrote:

shadowcallstack still misses even runtime.

See https://reviews.llvm.org/D59034 for shadowcallstack.

[eugenis]

LGTM, good job!

Regarding dfsan, I think it has users @pcc

[pcc]

In D59133#1422960, @eugenis wrote:

LGTM, good job!

Regarding dfsan, I think it has users @pcc

Yes, it has users, and LibFuzzer has a mode which uses it.

[pcc]

In D59133#1422951, @krytarowski wrote:

In D59133#1422906, @thakis wrote:

In D59133#1422851, @krytarowski wrote:

How about DFSan and shadowcallstack?

I don't understand how that question is related to this change. What do you mean?

shadowcallstack still misses even runtime.

The intent is that the runtime is supplied by the operating system or application. See https://clang.llvm.org/docs/ShadowCallStack.html for a description of the Android runtime.

[krytarowski]

In D59133#1422960, @eugenis wrote:

LGTM, good job!

Regarding dfsan, I think it has users @pcc

It was in plans to be ported to NetBSD.. but we wondered if there are any users.

clang/include/clang/Basic/Features.def

 FEATURE(enumerator_attributes, true)
 FEATURE(nullability, true)
 FEATURE(nullability_on_arrays, true)
 FEATURE(memory_sanitizer,
         LangOpts.Sanitize.hasOneOf(SanitizerKind::Memory |
                                    SanitizerKind::KernelMemory))
 FEATURE(thread_sanitizer, LangOpts.Sanitize.has(SanitizerKind::Thread))
 FEATURE(dataflow_sanitizer, LangOpts.Sanitize.has(SanitizerKind::DataFlow))
-FEATURE(efficiency_sanitizer,
-        LangOpts.Sanitize.hasOneOf(SanitizerKind::Efficiency))
 FEATURE(scudo, LangOpts.Sanitize.hasOneOf(SanitizerKind::Scudo))
 // Objective-C features
 FEATURE(objc_arr, LangOpts.ObjCAutoRefCount) // FIXME: REMOVE?
 FEATURE(objc_arc, LangOpts.ObjCAutoRefCount)
 FEATURE(objc_arc_fields, true)
 FEATURE(objc_arc_weak, LangOpts.ObjCWeak)
 FEATURE(objc_default_synthesize_properties, LangOpts.ObjC)
 FEATURE(objc_fixed_enum, LangOpts.ObjC)

clang/include/clang/Basic/Sanitizers.def

 
 SANITIZER_GROUP("integer", Integer,
                 ImplicitConversion | IntegerDivideByZero | Shift |
                     SignedIntegerOverflow | UnsignedIntegerOverflow)
 
 SANITIZER("local-bounds", LocalBounds)
 SANITIZER_GROUP("bounds", Bounds, ArrayBounds | LocalBounds)
 
-// EfficiencySanitizer
-SANITIZER("efficiency-cache-frag", EfficiencyCacheFrag)
-SANITIZER("efficiency-working-set", EfficiencyWorkingSet)
-// Meta-group only used internally.
-SANITIZER_GROUP("efficiency-all", Efficiency,
-                EfficiencyCacheFrag | EfficiencyWorkingSet)
-
 // Scudo hardened allocator
 SANITIZER("scudo", Scudo)
 
 // Magic group, containing all sanitizers. For example, "-fno-sanitize=all"
 // can be used to disable all the sanitizers.
 SANITIZER_GROUP("all", All, ~SanitizerMask())
 
 #undef SANITIZER
 #undef SANITIZER_GROUP

clang/include/clang/Driver/SanitizerArgs.h

public:
   }
   bool needsUbsanRt() const;
   bool requiresMinimalRuntime() const { return MinimalRuntime; }
   bool needsDfsanRt() const { return Sanitizers.has(SanitizerKind::DataFlow); }
   bool needsSafeStackRt() const { return SafeStackRuntime; }
   bool needsCfiRt() const;
   bool needsCfiDiagRt() const;
   bool needsStatsRt() const { return Stats; }
-  bool needsEsanRt() const {
-    return Sanitizers.hasOneOf(SanitizerKind::Efficiency);
-  }
   bool needsScudoRt() const { return Sanitizers.has(SanitizerKind::Scudo); }
 
   bool requiresPIE() const;
   bool needsUnwindTables() const;
   bool needsLTO() const;
   bool linkCXXRuntimes() const { return LinkCXXRuntimes; }
   bool hasCrossDsoCfi() const { return CfiCrossDso; }
   bool hasAnySanitizer() const { return !Sanitizers.empty(); }
   void addArgs(const ToolChain &TC, const llvm::opt::ArgList &Args,
                llvm::opt::ArgStringList &CmdArgs, types::ID InputType) const;
 };
 
 }  // namespace driver
 }  // namespace clang
 
 #endif

clang/lib/CodeGen/BackendUtil.cpp

 static void addDataFlowSanitizerPass(const PassManagerBuilder &Builder,
                                      legacy::PassManagerBase &PM) {
   const PassManagerBuilderWrapper &BuilderWrapper =
       static_cast<const PassManagerBuilderWrapper&>(Builder);
   const LangOptions &LangOpts = BuilderWrapper.getLangOpts();
   PM.add(createDataFlowSanitizerPass(LangOpts.SanitizerBlacklistFiles));
 }
 
-static void addEfficiencySanitizerPass(const PassManagerBuilder &Builder,
-                                       legacy::PassManagerBase &PM) {
-  const PassManagerBuilderWrapper &BuilderWrapper =
-      static_cast<const PassManagerBuilderWrapper&>(Builder);
-  const LangOptions &LangOpts = BuilderWrapper.getLangOpts();
-  EfficiencySanitizerOptions Opts;
-  if (LangOpts.Sanitize.has(SanitizerKind::EfficiencyCacheFrag))
-    Opts.ToolType = EfficiencySanitizerOptions::ESAN_CacheFrag;
-  else if (LangOpts.Sanitize.has(SanitizerKind::EfficiencyWorkingSet))
-    Opts.ToolType = EfficiencySanitizerOptions::ESAN_WorkingSet;
-  PM.add(createEfficiencySanitizerPass(Opts));
-}
-
 static TargetLibraryInfoImpl *createTLII(llvm::Triple &TargetTriple,
                                          const CodeGenOptions &CodeGenOpts) {
   TargetLibraryInfoImpl *TLII = new TargetLibraryInfoImpl(TargetTriple);
   if (!CodeGenOpts.SimplifyLibCalls)
     TLII->disableAllFunctions();
   else {
     // Disable individual libc/libm calls in TargetLibraryInfo.
     LibFunc F;
void EmitAssemblyHelper::CreatePasses(legacy::PassManager &MPM,
 
   if (LangOpts.Sanitize.has(SanitizerKind::DataFlow)) {
     PMBuilder.addExtension(PassManagerBuilder::EP_OptimizerLast,
                            addDataFlowSanitizerPass);
     PMBuilder.addExtension(PassManagerBuilder::EP_EnabledOnOptLevel0,
                            addDataFlowSanitizerPass);
   }
 
-  if (LangOpts.Sanitize.hasOneOf(SanitizerKind::Efficiency)) {
-    PMBuilder.addExtension(PassManagerBuilder::EP_OptimizerLast,
-                           addEfficiencySanitizerPass);
-    PMBuilder.addExtension(PassManagerBuilder::EP_EnabledOnOptLevel0,
-                           addEfficiencySanitizerPass);
-  }
-
   // Set up the per-function pass manager.
   FPM.add(new TargetLibraryInfoWrapperPass(*TLII));
   if (CodeGenOpts.VerifyModule)
     FPM.add(createVerifierPass());
 
   // Set up the per-module pass manager.
   if (!CodeGenOpts.RewriteMapFiles.empty())
     addSymbolRewriterPass(CodeGenOpts, &MPM);

clang/lib/Driver/SanitizerArgs.cpp

std::pair<SanitizerMask, SanitizerMask> IncompatibleGroups[] = {
       std::make_pair(SanitizerKind::Leak,
                      SanitizerKind::Thread | SanitizerKind::Memory),
       std::make_pair(SanitizerKind::KernelAddress,
                      SanitizerKind::Address | SanitizerKind::Leak |
                          SanitizerKind::Thread | SanitizerKind::Memory),
       std::make_pair(SanitizerKind::HWAddress,
                      SanitizerKind::Address | SanitizerKind::Thread |
                          SanitizerKind::Memory | SanitizerKind::KernelAddress),
-      std::make_pair(SanitizerKind::Efficiency,
-                     SanitizerKind::Address | SanitizerKind::HWAddress |
-                         SanitizerKind::Leak | SanitizerKind::Thread |
-                         SanitizerKind::Memory | SanitizerKind::KernelAddress),
       std::make_pair(SanitizerKind::Scudo,
                      SanitizerKind::Address | SanitizerKind::HWAddress |
                          SanitizerKind::Leak | SanitizerKind::Thread |
-                         SanitizerKind::Memory | SanitizerKind::KernelAddress |
-                         SanitizerKind::Efficiency),
+                         SanitizerKind::Memory | SanitizerKind::KernelAddress),
       std::make_pair(SanitizerKind::SafeStack,
                      SanitizerKind::Address | SanitizerKind::HWAddress |
                          SanitizerKind::Leak | SanitizerKind::Thread |
-                         SanitizerKind::Memory | SanitizerKind::KernelAddress |
-                         SanitizerKind::Efficiency),
+                         SanitizerKind::Memory | SanitizerKind::KernelAddress),
       std::make_pair(SanitizerKind::KernelHWAddress,
                      SanitizerKind::Address | SanitizerKind::HWAddress |
                          SanitizerKind::Leak | SanitizerKind::Thread |
                          SanitizerKind::Memory | SanitizerKind::KernelAddress |
-                         SanitizerKind::Efficiency | SanitizerKind::SafeStack),
+                         SanitizerKind::SafeStack),
       std::make_pair(SanitizerKind::KernelMemory,
                      SanitizerKind::Address | SanitizerKind::HWAddress |
                          SanitizerKind::Leak | SanitizerKind::Thread |
                          SanitizerKind::Memory | SanitizerKind::KernelAddress |
-                         SanitizerKind::Efficiency | SanitizerKind::Scudo |
-                         SanitizerKind::SafeStack)};
+                         SanitizerKind::Scudo | SanitizerKind::SafeStack)};
   // Enable toolchain specific default sanitizers if not explicitly disabled.
   SanitizerMask Default = TC.getDefaultSanitizers() & ~AllRemove;
 
   // Disable default sanitizers that are incompatible with explicitly requested
   // ones.
   for (auto G : IncompatibleGroups) {
     SanitizerMask Group = G.first;
     if ((Default & Group) && (Kinds & G.second))
SanitizerMask parseArgValues(const Driver &D, const llvm::opt::Arg *A,
   SanitizerMask Kinds;
   for (int i = 0, n = A->getNumValues(); i != n; ++i) {
     const char *Value = A->getValue(i);
     SanitizerMask Kind;
     // Special case: don't accept -fsanitize=all.
     if (A->getOption().matches(options::OPT_fsanitize_EQ) &&
         0 == strcmp("all", Value))
       Kind = SanitizerMask();
-    // Similarly, don't accept -fsanitize=efficiency-all.
-    else if (A->getOption().matches(options::OPT_fsanitize_EQ) &&
-        0 == strcmp("efficiency-all", Value))
-      Kind = SanitizerMask();
     else
       Kind = parseSanitizerValue(Value, /*AllowGroups=*/true);
 
     if (Kind)
       Kinds |= Kind;
     else if (DiagnoseErrors)
       D.Diag(clang::diag::err_drv_unsupported_option_argument)
           << A->getOption().getName() << Value;

clang/lib/Driver/ToolChains/CommonArgs.cpp

if (SanArgs.needsCfiDiagRt()) {
     StaticRuntimes.push_back("cfi_diag");
     if (SanArgs.linkCXXRuntimes())
       StaticRuntimes.push_back("ubsan_standalone_cxx");
   }
   if (SanArgs.needsStatsRt()) {
     NonWholeStaticRuntimes.push_back("stats");
     RequiredSymbols.push_back("__sanitizer_stats_register");
   }
-  if (SanArgs.needsEsanRt())
-    StaticRuntimes.push_back("esan");
   if (SanArgs.needsScudoRt()) {
     if (SanArgs.requiresMinimalRuntime()) {
       StaticRuntimes.push_back("scudo_minimal");
       if (SanArgs.linkCXXRuntimes())
         StaticRuntimes.push_back("scudo_cxx_minimal");
     } else {
       StaticRuntimes.push_back("scudo");
       if (SanArgs.linkCXXRuntimes())

clang/lib/Driver/ToolChains/Darwin.cpp

if (Sanitize.needsFuzzer() && !Args.hasArg(options::OPT_dynamiclib)) {
 
     // Libfuzzer is written in C++ and requires libcxx.
     AddCXXStdlibLibArgs(Args, CmdArgs);
   }
   if (Sanitize.needsStatsRt()) {
     AddLinkRuntimeLib(Args, CmdArgs, "stats_client", RLO_AlwaysLink);
     AddLinkSanitizerLibArgs(Args, CmdArgs, "stats");
   }
-  if (Sanitize.needsEsanRt())
-    AddLinkSanitizerLibArgs(Args, CmdArgs, "esan");
 
   const XRayArgs &XRay = getXRayArgs();
   if (XRay.needsXRayRt()) {
     AddLinkRuntimeLib(Args, CmdArgs, "xray");
     AddLinkRuntimeLib(Args, CmdArgs, "xray-basic");
     AddLinkRuntimeLib(Args, CmdArgs, "xray-fdr");
   }
 

clang/lib/Driver/ToolChains/Linux.cpp

SanitizerMask Linux::getSupportedSanitizers() const {
   if (IsX86_64 || IsMIPS64 || IsAArch64)
     Res |= SanitizerKind::DataFlow;
   if (IsX86_64 || IsMIPS64 || IsAArch64 || IsX86 || IsArmArch || IsPowerPC64)
     Res |= SanitizerKind::Leak;
   if (IsX86_64 || IsMIPS64 || IsAArch64 || IsPowerPC64)
     Res |= SanitizerKind::Thread;
   if (IsX86_64)
     Res |= SanitizerKind::KernelMemory;
-  if (IsX86_64 || IsMIPS64)
-    Res |= SanitizerKind::Efficiency;
   if (IsX86 || IsX86_64)
     Res |= SanitizerKind::Function;
   if (IsX86_64 || IsMIPS64 || IsAArch64 || IsX86 || IsMIPS || IsArmArch ||
       IsPowerPC64)
     Res |= SanitizerKind::Scudo;
   if (IsX86_64 || IsAArch64) {
     Res |= SanitizerKind::HWAddress;
     Res |= SanitizerKind::KernelHWAddress;

clang/lib/Driver/ToolChains/NetBSD.cpp

if (IsX86 || IsX86_64) {
     Res |= SanitizerKind::Function;
     Res |= SanitizerKind::Leak;
     Res |= SanitizerKind::SafeStack;
     Res |= SanitizerKind::Scudo;
     Res |= SanitizerKind::Vptr;
   }
   if (IsX86_64) {
     Res |= SanitizerKind::DataFlow;
-    Res |= SanitizerKind::Efficiency;
     Res |= SanitizerKind::Fuzzer;
     Res |= SanitizerKind::FuzzerNoLink;
     Res |= SanitizerKind::HWAddress;
     Res |= SanitizerKind::KernelAddress;
     Res |= SanitizerKind::KernelHWAddress;
     Res |= SanitizerKind::KernelMemory;
     Res |= SanitizerKind::Memory;
     Res |= SanitizerKind::Thread;

clang/test/Driver/esan.c

-// RUN: %clang     -target x86_64-unknown-linux -fsanitize=efficiency-cache-frag %s -S -emit-llvm -o - | FileCheck %s
-// RUN: %clang -O1 -target x86_64-unknown-linux -fsanitize=efficiency-cache-frag %s -S -emit-llvm -o - | FileCheck %s
-// RUN: %clang -O2 -target x86_64-unknown-linux -fsanitize=efficiency-cache-frag %s -S -emit-llvm -o - | FileCheck %s
-// RUN: %clang -O3 -target x86_64-unknown-linux -fsanitize=efficiency-cache-frag %s -S -emit-llvm -o - | FileCheck %s
-// RUN: %clang     -target x86_64-unknown-linux -fsanitize=efficiency-working-set %s -S -emit-llvm -o - | FileCheck %s
-// RUN: %clang -O1 -target x86_64-unknown-linux -fsanitize=efficiency-working-set %s -S -emit-llvm -o - | FileCheck %s
-// RUN: %clang -O2 -target x86_64-unknown-linux -fsanitize=efficiency-working-set %s -S -emit-llvm -o - | FileCheck %s
-// RUN: %clang -O3 -target x86_64-unknown-linux -fsanitize=efficiency-working-set %s -S -emit-llvm -o - | FileCheck %s
-// RUN: %clang -target mips64-unknown-linux -fsanitize=efficiency-cache-frag %s -S -emit-llvm -o - | FileCheck %s
-// RUN: %clang -target mips64-unknown-linux -fsanitize=efficiency-working-set %s -S -emit-llvm -o - | FileCheck %s
-// RUN: %clang -target mips64el-unknown-linux -fsanitize=efficiency-cache-frag %s -S -emit-llvm -o - | FileCheck %s
-// RUN: %clang -target mips64el-unknown-linux -fsanitize=efficiency-working-set %s -S -emit-llvm -o - | FileCheck %s
-// Verify that -fsanitize=efficiency-* invokes esan instrumentation.
-
-int foo(int *a) { return *a; }
-// CHECK: __esan_init

clang/test/Driver/fsanitize.c

 // CHECK-SANHA-SANT: '-fsanitize=hwaddress' not allowed with '-fsanitize=thread'
 
 // RUN: %clang -target x86_64-linux-gnu -fsanitize=hwaddress,memory -pie -fno-rtti %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-SANHA-SANM
 // CHECK-SANHA-SANM: '-fsanitize=hwaddress' not allowed with '-fsanitize=memory'
 
 // RUN: %clang -target x86_64-linux-gnu -fsanitize=hwaddress,address -fno-rtti %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-SANHA-SANA
 // CHECK-SANHA-SANA: '-fsanitize=hwaddress' not allowed with '-fsanitize=address'
 
-// RUN: %clang -target x86_64-linux-gnu -fsanitize=efficiency-cache-frag,address -pie -fno-rtti %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-SANE-SANA
-// RUN: %clang -target x86_64-linux-gnu -fsanitize=efficiency-working-set,address -pie -fno-rtti %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-SANE-SANA
-// CHECK-SANE-SANA: '-fsanitize=efficiency-{{.*}}' not allowed with '-fsanitize=address'
-
-// RUN: %clang -target x86_64-linux-gnu -fsanitize=efficiency-cache-frag,leak -pie -fno-rtti %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-SANE-SANL
-// RUN: %clang -target x86_64-linux-gnu -fsanitize=efficiency-working-set,leak -pie -fno-rtti %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-SANE-SANL
-// CHECK-SANE-SANL: '-fsanitize=efficiency-{{.*}}' not allowed with '-fsanitize=leak'
-
-// RUN: %clang -target x86_64-linux-gnu -fsanitize=efficiency-cache-frag,thread -pie -fno-rtti %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-SANE-SANT
-// RUN: %clang -target x86_64-linux-gnu -fsanitize=efficiency-working-set,thread -pie -fno-rtti %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-SANE-SANT
-// CHECK-SANE-SANT: '-fsanitize=efficiency-{{.*}}' not allowed with '-fsanitize=thread'
-
-// RUN: %clang -target x86_64-linux-gnu -fsanitize=efficiency-cache-frag,memory -pie -fno-rtti %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-SANE-SANM
-// RUN: %clang -target x86_64-linux-gnu -fsanitize=efficiency-working-set,memory -pie -fno-rtti %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-SANE-SANM
-// CHECK-SANE-SANM: '-fsanitize=efficiency-{{.*}}' not allowed with '-fsanitize=memory'
-
-// RUN: %clang -target x86_64-linux-gnu -fsanitize=efficiency-cache-frag,kernel-memory -pie -fno-rtti %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-SANE-SANKM
-// RUN: %clang -target x86_64-linux-gnu -fsanitize=efficiency-working-set,kernel-memory -pie -fno-rtti %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-SANE-SANKM
-// CHECK-SANE-SANKM: '-fsanitize=kernel-memory' not allowed with '-fsanitize=efficiency-{{.*}}'
-
-// RUN: %clang -target x86_64-linux-gnu -fsanitize=efficiency-cache-frag,kernel-address -pie -fno-rtti %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-SANE-SANKA
-// RUN: %clang -target x86_64-linux-gnu -fsanitize=efficiency-working-set,kernel-address -pie -fno-rtti %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-SANE-SANKA
-// CHECK-SANE-SANKA: '-fsanitize=efficiency-{{.*}}' not allowed with '-fsanitize=kernel-address'
-
 // RUN: %clang -target x86_64-linux-gnu -fsanitize=address -fsanitize-address-use-after-scope %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-USE-AFTER-SCOPE
 // RUN: %clang_cl --target=x86_64-windows -fsanitize=address -fsanitize-address-use-after-scope -### -- %s 2>&1 | FileCheck %s --check-prefix=CHECK-USE-AFTER-SCOPE
 // CHECK-USE-AFTER-SCOPE: -cc1{{.*}}-fsanitize-address-use-after-scope
 
 // RUN: %clang -target x86_64-linux-gnu -fsanitize=address -fno-sanitize-address-use-after-scope %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-USE-AFTER-SCOPE-OFF
 // RUN: %clang_cl --target=x86_64-windows -fsanitize=address -fno-sanitize-address-use-after-scope -### -- %s 2>&1 | FileCheck %s --check-prefix=CHECK-USE-AFTER-SCOPE-OFF
 // CHECK-USE-AFTER-SCOPE-OFF-NOT: -cc1{{.*}}address-use-after-scope
 

 // CHECK-LSAN-OPENBSD: unsupported option '-fsanitize=leak' for target 'i386-pc-openbsd'
 
 // RUN: %clang -target i386-pc-openbsd -fsanitize=thread %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-TSAN-OPENBSD
 // CHECK-TSAN-OPENBSD: unsupported option '-fsanitize=thread' for target 'i386-pc-openbsd'
 
 // RUN: %clang -target i386-pc-openbsd -fsanitize=memory %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-MSAN-OPENBSD
 // CHECK-MSAN-OPENBSD: unsupported option '-fsanitize=memory' for target 'i386-pc-openbsd'
 
-// RUN: %clang -target i386-pc-openbsd -fsanitize=efficiency-cache-frag %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-ESAN-OPENBSD
-// RUN: %clang -target i386-pc-openbsd -fsanitize=efficiency-working-set %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-ESAN-OPENBSD
-// CHECK-ESAN-OPENBSD: error: unsupported option '-fsanitize=efficiency-{{.*}}' for target 'i386-pc-openbsd'
-
 // RUN: %clang -target x86_64-apple-darwin -fsanitize=leak %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-LSAN-X86-64-DARWIN
 // CHECK-LSAN-X86-64-DARWIN-NOT: unsupported option
 
 // RUN: %clang -target x86_64-apple-iossimulator -fsanitize=leak %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-LSAN-X86-64-IOSSIMULATOR
 // CHECK-LSAN-X86-64-IOSSIMULATOR-NOT: unsupported option
 
 // RUN: %clang -target x86_64-apple-tvossimulator -fsanitize=leak %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-LSAN-X86-64-TVOSSIMULATOR
 // CHECK-LSAN-X86-64-TVOSSIMULATOR-NOT: unsupported option
 
 // RUN: %clang -target i386-apple-darwin -fsanitize=leak %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-LSAN-I386-DARWIN
 // CHECK-LSAN-I386-DARWIN-NOT: unsupported option
 
 // RUN: %clang -target arm-apple-ios -fsanitize=leak %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-LSAN-ARM-IOS
 // CHECK-LSAN-ARM-IOS-NOT: unsupported option
 
 // RUN: %clang -target i386-apple-iossimulator -fsanitize=leak %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-LSAN-I386-IOSSIMULATOR
 // CHECK-LSAN-I386-IOSSIMULATOR-NOT: unsupported option
 
 // RUN: %clang -target i386-apple-tvossimulator -fsanitize=leak %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-LSAN-I386-TVOSSIMULATOR
 // CHECK-LSAN-I386-TVOSSIMULATOR-NOT: unsupported option
 
-// RUN: %clang -target i686-linux-gnu -fsanitize=efficiency-cache-frag %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-ESAN-X86
-// RUN: %clang -target i686-linux-gnu -fsanitize=efficiency-working-set %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-ESAN-X86
-// CHECK-ESAN-X86: error: unsupported option '-fsanitize=efficiency-{{.*}}' for target 'i686-unknown-linux-gnu'
-
-// RUN: %clang -target x86_64-apple-darwin10 -fsanitize=efficiency-cache-frag %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-ESAN-DARWIN
-// RUN: %clang -target x86_64-apple-darwin10 -fsanitize=efficiency-working-set %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-ESAN-DARWIN
-// CHECK-ESAN-DARWIN: unsupported option '-fsanitize=efficiency-{{.*}}' for target 'x86_64-apple-darwin10'
-
-// RUN: %clang -target i386-apple-darwin -fsanitize=efficiency-cache-frag %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-ESAN-I386-DARWIN
-// RUN: %clang -target i386-apple-darwin -fsanitize=efficiency-working-set %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-ESAN-I386-DARWIN
-// CHECK-ESAN-I386-DARWIN: unsupported option '-fsanitize=efficiency-{{.*}}' for target 'i386-apple-darwin'
-
-// RUN: %clang -target arm-apple-ios -fsanitize=efficiency-cache-frag %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-ESAN-ARM-IOS
-// RUN: %clang -target arm-apple-ios -fsanitize=efficiency-working-set %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-ESAN-ARM-IOS
-// CHECK-ESAN-ARM-IOS: unsupported option '-fsanitize=efficiency-{{.*}}' for target 'arm-apple-ios'
-
-// RUN: %clang -target i386-apple-iossimulator -fsanitize=efficiency-cache-frag %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-ESAN-I386-IOSSIMULATOR
-// RUN: %clang -target i386-apple-iossimulator -fsanitize=efficiency-working-set %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-ESAN-I386-IOSSIMULATOR
-// CHECK-ESAN-I386-IOSSIMULATOR: unsupported option '-fsanitize=efficiency-{{.*}}' for target 'i386-apple-iossimulator-simulator'
-
-// RUN: %clang -target i386-apple-tvossimulator -fsanitize=efficiency-cache-frag %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-ESAN-I386-TVOSSIMULATOR
-// RUN: %clang -target i386-apple-tvossimulator -fsanitize=efficiency-working-set %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-ESAN-I386-TVOSSIMULATOR
-// CHECK-ESAN-I386-TVOSSIMULATOR: unsupported option '-fsanitize=efficiency-{{.*}}' for target 'i386-apple-tvossimulator-simulator'
-
-
 
 // RUN: %clang -target x86_64-linux-gnu -fvisibility=hidden -fsanitize=cfi -flto -c %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-CFI
 // RUN: %clang -target x86_64-apple-darwin10 -fvisibility=hidden -fsanitize=cfi -flto -c %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-CFI
 // RUN: %clang -target x86_64-pc-win32 -fvisibility=hidden -fsanitize=cfi -flto -c %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-CFI-NOMFCALL
 // RUN: %clang -target x86_64-linux-gnu -fvisibility=hidden -fsanitize=cfi -fsanitize-cfi-cross-dso -flto -c %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-CFI-NOMFCALL
 // RUN: %clang -target x86_64-linux-gnu -fvisibility=hidden -fsanitize=cfi-derived-cast -flto -c %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-CFI-DCAST
 // RUN: %clang -target x86_64-linux-gnu -fvisibility=hidden -fsanitize=cfi-unrelated-cast -flto -c %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-CFI-UCAST
 // RUN: %clang -target x86_64-linux-gnu -flto -fvisibility=hidden -fsanitize=cfi-nvcall -c %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-CFI-NVCALL

 // RUN: %clang -target x86_64-scei-ps4 -fsanitize=dataflow %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-DFSAN-PS4
 // CHECK-DFSAN-PS4: unsupported option '-fsanitize=dataflow' for target 'x86_64-scei-ps4'
 // RUN: %clang -target x86_64-scei-ps4 -fsanitize=leak %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-LSAN-PS4
 // CHECK-LSAN-PS4: unsupported option '-fsanitize=leak' for target 'x86_64-scei-ps4'
 // RUN: %clang -target x86_64-scei-ps4 -fsanitize=memory %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-MSAN-PS4
 // CHECK-MSAN-PS4: unsupported option '-fsanitize=memory' for target 'x86_64-scei-ps4'
 // RUN: %clang -target x86_64-scei-ps4 -fsanitize=thread %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-TSAN-PS4
 // CHECK-TSAN-PS4: unsupported option '-fsanitize=thread' for target 'x86_64-scei-ps4'
-// RUN: %clang -target x86_64-scei-ps4 -fsanitize=efficiency-cache-frag %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-ESAN-PS4
-// RUN: %clang -target x86_64-scei-ps4 -fsanitize=efficiency-working-set %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-ESAN-PS4
-// CHECK-ESAN-PS4: unsupported option '-fsanitize=efficiency-{{.*}}' for target 'x86_64-scei-ps4'
 // RUN: %clang -target x86_64-scei-ps4 -fsanitize=address %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-ASAN-PS4
 // Make sure there are no *.{o,bc} or -l passed before the ASan library.
 // CHECK-ASAN-PS4-NOT: {{(\.(o|bc)"? |-l).*-lSceDbgAddressSanitizer_stub_weak}}
 // CHECK-ASAN-PS4: --dependent-lib=libSceDbgAddressSanitizer_stub_weak.a
 // CHECK-ASAN-PS4-NOT: {{(\.(o|bc)"? |-l).*-lSceDbgAddressSanitizer_stub_weak}}
 // CHECK-ASAN-PS4: -lSceDbgAddressSanitizer_stub_weak
 // RUN: %clang -target x86_64-scei-ps4 -fsanitize=address -nostdlib %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-ASAN-NOLIB-PS4
 // RUN: %clang -target x86_64-scei-ps4 -fsanitize=address -nodefaultlibs %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-ASAN-NOLIB-PS4

clang/test/Driver/sanitize_unwind_tables.c

 // Sanitizers need to unwind stack at any code location.
 // Test that unwind tables are enabled in supported configurations.
 
 // RUN: %clang -target x86_64-linux-gnu -fsanitize=address %s -### 2>&1 |  FileCheck %s
 // RUN: %clang -target i686-linux-gnu -fsanitize=address %s -### 2>&1 |  FileCheck %s
 // RUN: %clang -target arm-linux-androideabi -fsanitize=address %s -### 2>&1 |  FileCheck %s
 // RUN: %clang -target x86_64-linux-gnu -fsanitize=memory %s -### 2>&1 |  FileCheck %s
 // RUN: %clang -target x86_64-linux-gnu -fsanitize=thread %s -### 2>&1 |  FileCheck %s
 // RUN: %clang -target x86_64-linux-gnu -fsanitize=dataflow %s -### 2>&1 |  FileCheck %s
-// RUN: %clang -target x86_64-linux-gnu -fsanitize=efficiency-cache-frag %s -### 2>&1 |  FileCheck %s
-// RUN: %clang -target x86_64-linux-gnu -fsanitize=efficiency-working-set %s -### 2>&1 |  FileCheck %s
 // RUN: %clang -target aarch64-linux-gnu -fsanitize=hwaddress %s -### 2>&1 |  FileCheck %s
 // RUN: %clang -target aarch64-linux-android -fsanitize=hwaddress %s -### 2>&1 |  FileCheck %s
 
 // CHECK: -munwind-tables

clang/test/Driver/sanitizer-ld.c

 
 // RUN: %clang -fsanitize=address,undefined %s -### -o %t.o 2>&1 \
 // RUN:     -target x86_64-scei-ps4 -fuse-ld=ld \
 // RUN:     -shared \
 // RUN:     -nostdlib \
 // RUN:   | FileCheck --check-prefix=CHECK-NOLIB-PS4 %s
 // CHECK-NOLIB-PS4-NOT: SceDbgAddressSanitizer_stub_weak
 
-// RUN: %clang -fsanitize=efficiency-cache-frag %s -### -o %t.o 2>&1 \
-// RUN:     -target x86_64-unknown-linux -fuse-ld=ld \
-// RUN:   | FileCheck --check-prefix=CHECK-ESAN-LINUX %s
-// RUN: %clang -fsanitize=efficiency-working-set %s -### -o %t.o 2>&1 \
-// RUN:     -target x86_64-unknown-linux -fuse-ld=ld \
-// RUN:   | FileCheck --check-prefix=CHECK-ESAN-LINUX %s
-//
-// CHECK-ESAN-LINUX: "{{(.*[^-.0-9A-Z_a-z])?}}ld{{(.exe)?}}"
-// CHECK-ESAN-LINUX: libclang_rt.esan-x86_64.a
-
 // RUN: %clang -fsanitize=scudo %s -### -o %t.o 2>&1 \
 // RUN:     -target i386-unknown-linux -fuse-ld=ld \
 // RUN:     --sysroot=%S/Inputs/basic_linux_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-SCUDO-LINUX %s
 // CHECK-SCUDO-LINUX: "{{.*}}ld{{(.exe)?}}"
 // CHECK-SCUDO-LINUX: "-pie"
 // CHECK-SCUDO-LINUX: "--whole-archive" "{{.*}}libclang_rt.scudo-i386.a" "--no-whole-archive"
 // CHECK-SCUDO-LINUX-NOT: "-lstdc++"

clang/test/Lexer/has_feature_efficiency_sanitizer.cpp

-// RUN: %clang_cc1 -E -fsanitize=efficiency-cache-frag %s -o - | FileCheck --check-prefix=CHECK-ESAN %s
-// RUN: %clang_cc1 -E -fsanitize=efficiency-working-set %s -o - | FileCheck --check-prefix=CHECK-ESAN %s
-// RUN: %clang_cc1 -E  %s -o - | FileCheck --check-prefix=CHECK-NO-ESAN %s
-
-#if __has_feature(efficiency_sanitizer)
-int EfficiencySanitizerEnabled();
-#else
-int EfficiencySanitizerDisabled();
-#endif
-
-// CHECK-ESAN: EfficiencySanitizerEnabled
-// CHECK-NO-ESAN: EfficiencySanitizerDisabled

compiler-rt/cmake/config-ix.cmake

 set(ALL_HWASAN_SUPPORTED_ARCH ${X86_64} ${ARM64})
 set(ALL_PROFILE_SUPPORTED_ARCH ${X86} ${X86_64} ${ARM32} ${ARM64} ${PPC64}
     ${MIPS32} ${MIPS64} ${S390X})
 set(ALL_TSAN_SUPPORTED_ARCH ${X86_64} ${MIPS64} ${ARM64} ${PPC64})
 set(ALL_UBSAN_SUPPORTED_ARCH ${X86} ${X86_64} ${ARM32} ${ARM64}
     ${MIPS32} ${MIPS64} ${PPC64} ${S390X})
 set(ALL_SAFESTACK_SUPPORTED_ARCH ${X86} ${X86_64} ${ARM64} ${MIPS32} ${MIPS64})
 set(ALL_CFI_SUPPORTED_ARCH ${X86} ${X86_64} ${ARM32} ${ARM64} ${MIPS64})
-set(ALL_ESAN_SUPPORTED_ARCH ${X86_64} ${MIPS64})
 set(ALL_SCUDO_SUPPORTED_ARCH ${X86} ${X86_64} ${ARM32} ${ARM64} ${MIPS32} ${MIPS64} ${PPC64})
 set(ALL_SCUDO_STANDALONE_SUPPORTED_ARCH ${X86} ${X86_64})
 if(APPLE)
 set(ALL_XRAY_SUPPORTED_ARCH ${X86_64})
 else()
 set(ALL_XRAY_SUPPORTED_ARCH ${X86_64} ${ARM32} ${ARM64} ${MIPS32} ${MIPS64} powerpc64le)
 endif()
 set(ALL_SHADOWCALLSTACK_SUPPORTED_ARCH ${ARM64})
list_intersect(UBSAN_SUPPORTED_ARCH
     ALL_UBSAN_SUPPORTED_ARCH
     SANITIZER_COMMON_SUPPORTED_ARCH)
   list_intersect(SAFESTACK_SUPPORTED_ARCH
     ALL_SAFESTACK_SUPPORTED_ARCH
     SANITIZER_COMMON_SUPPORTED_ARCH)
   list_intersect(CFI_SUPPORTED_ARCH
     ALL_CFI_SUPPORTED_ARCH
     SANITIZER_COMMON_SUPPORTED_ARCH)
-  list_intersect(ESAN_SUPPORTED_ARCH
-    ALL_ESAN_SUPPORTED_ARCH
-    SANITIZER_COMMON_SUPPORTED_ARCH)
   list_intersect(SCUDO_SUPPORTED_ARCH
     ALL_SCUDO_SUPPORTED_ARCH
     SANITIZER_COMMON_SUPPORTED_ARCH)
   list_intersect(SCUDO_STANDALONE_SUPPORTED_ARCH
     ALL_SCUDO_STANDALONE_SUPPORTED_ARCH
     SANITIZER_COMMON_SUPPORTED_ARCH)
   list_intersect(FUZZER_SUPPORTED_ARCH
     ALL_FUZZER_SUPPORTED_ARCH
else()
   filter_available_targets(MSAN_SUPPORTED_ARCH ${ALL_MSAN_SUPPORTED_ARCH})
   filter_available_targets(HWASAN_SUPPORTED_ARCH ${ALL_HWASAN_SUPPORTED_ARCH})
   filter_available_targets(PROFILE_SUPPORTED_ARCH ${ALL_PROFILE_SUPPORTED_ARCH})
   filter_available_targets(TSAN_SUPPORTED_ARCH ${ALL_TSAN_SUPPORTED_ARCH})
   filter_available_targets(UBSAN_SUPPORTED_ARCH ${ALL_UBSAN_SUPPORTED_ARCH})
   filter_available_targets(SAFESTACK_SUPPORTED_ARCH
     ${ALL_SAFESTACK_SUPPORTED_ARCH})
   filter_available_targets(CFI_SUPPORTED_ARCH ${ALL_CFI_SUPPORTED_ARCH})
-  filter_available_targets(ESAN_SUPPORTED_ARCH ${ALL_ESAN_SUPPORTED_ARCH})
   filter_available_targets(SCUDO_SUPPORTED_ARCH ${ALL_SCUDO_SUPPORTED_ARCH})
   filter_available_targets(SCUDO_STANDALONE_SUPPORTED_ARCH ${ALL_SCUDO_STANDALONE_SUPPORTED_ARCH})
   filter_available_targets(XRAY_SUPPORTED_ARCH ${ALL_XRAY_SUPPORTED_ARCH})
   filter_available_targets(SHADOWCALLSTACK_SUPPORTED_ARCH
     ${ALL_SHADOWCALLSTACK_SUPPORTED_ARCH})
 endif()
 
 if (MSVC)

 message(STATUS "Compiler-RT supported architectures: ${COMPILER_RT_SUPPORTED_ARCH}")
 
 if(ANDROID)
   set(OS_NAME "Android")
 else()
   set(OS_NAME "${CMAKE_SYSTEM_NAME}")
 endif()
 
-set(ALL_SANITIZERS asan;dfsan;msan;hwasan;tsan;safestack;cfi;esan;scudo;ubsan_minimal)
+set(ALL_SANITIZERS asan;dfsan;msan;hwasan;tsan;safestack;cfi;scudo;ubsan_minimal)
 set(COMPILER_RT_SANITIZERS_TO_BUILD all CACHE STRING
     "sanitizers to build if supported on the target (all;${ALL_SANITIZERS})")
 list_replace(COMPILER_RT_SANITIZERS_TO_BUILD all "${ALL_SANITIZERS}")
 
 if (SANITIZER_COMMON_SUPPORTED_ARCH AND NOT LLVM_USE_SANITIZER AND
     (OS_NAME MATCHES "Android|Darwin|Linux|FreeBSD|NetBSD|OpenBSD|Fuchsia|SunOS" OR
     (OS_NAME MATCHES "Windows" AND NOT CYGWIN AND
         (NOT MINGW OR CMAKE_CXX_COMPILER_ID MATCHES "Clang"))))

 endif()
 
 if (COMPILER_RT_HAS_SANITIZER_COMMON AND CFI_SUPPORTED_ARCH)
   set(COMPILER_RT_HAS_CFI TRUE)
 else()
   set(COMPILER_RT_HAS_CFI FALSE)
 endif()
 
-if (COMPILER_RT_HAS_SANITIZER_COMMON AND ESAN_SUPPORTED_ARCH AND
-    OS_NAME MATCHES "Linux|FreeBSD")
-  set(COMPILER_RT_HAS_ESAN TRUE)
-else()
-  set(COMPILER_RT_HAS_ESAN FALSE)
-endif()
-
 #TODO(kostyak): add back Android & Fuchsia when the code settles a bit.
 if (SCUDO_STANDALONE_SUPPORTED_ARCH AND OS_NAME MATCHES "Linux")
   set(COMPILER_RT_HAS_SCUDO_STANDALONE TRUE)
 else()
   set(COMPILER_RT_HAS_SCUDO_STANDALONE FALSE)
 endif()
 
 if (COMPILER_RT_HAS_SANITIZER_COMMON AND SCUDO_SUPPORTED_ARCH AND

compiler-rt/include/CMakeLists.txt

 if (COMPILER_RT_BUILD_SANITIZERS)
   set(SANITIZER_HEADERS
     sanitizer/allocator_interface.h
     sanitizer/asan_interface.h
     sanitizer/common_interface_defs.h
     sanitizer/coverage_interface.h
     sanitizer/dfsan_interface.h
-    sanitizer/esan_interface.h
     sanitizer/hwasan_interface.h
     sanitizer/linux_syscall_hooks.h
     sanitizer/lsan_interface.h
     sanitizer/msan_interface.h
     sanitizer/netbsd_syscall_hooks.h
     sanitizer/scudo_interface.h
     sanitizer/tsan_interface.h
     sanitizer/tsan_interface_atomic.h

compiler-rt/include/sanitizer/esan_interface.h

-//===-- sanitizer/esan_interface.h ------------------------------*- C++ -*-===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-//
-// This file is a part of EfficiencySanitizer, a family of performance tuners.
-//
-// Public interface header.
-//===----------------------------------------------------------------------===//
-#ifndef SANITIZER_ESAN_INTERFACE_H
-#define SANITIZER_ESAN_INTERFACE_H
-
-#include <sanitizer/common_interface_defs.h>
-
-// We declare our interface routines as weak to allow the user to avoid
-// ifdefs and instead use this pattern to allow building the same sources
-// with and without our runtime library:
-//     if (__esan_report)
-//       __esan_report();
-#ifdef _MSC_VER
-/* selectany is as close to weak as we'll get. */
-#define COMPILER_RT_WEAK __declspec(selectany)
-#elif __GNUC__
-#define COMPILER_RT_WEAK __attribute__((weak))
-#else
-#define COMPILER_RT_WEAK
-#endif
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-// This function can be called mid-run (or at the end of a run for
-// a server process that doesn't shut down normally) to request that
-// data for that point in the run be reported from the tool.
-void COMPILER_RT_WEAK __esan_report(void);
-
-// This function returns the number of samples that the esan tool has collected
-// to this point.  This is useful for testing.
-unsigned int COMPILER_RT_WEAK __esan_get_sample_count(void);
-
-#ifdef __cplusplus
-} // extern "C"
-#endif
-
-#endif // SANITIZER_ESAN_INTERFACE_H

compiler-rt/lib/esan/CMakeLists.txt

-# Build for the EfficiencySanitizer runtime support library.
-
-add_compiler_rt_component(esan)
-
-set(ESAN_RTL_CFLAGS ${SANITIZER_COMMON_CFLAGS})
-append_rtti_flag(OFF ESAN_RTL_CFLAGS)
-
-include_directories(..)
-
-set(ESAN_SOURCES
-  esan.cpp
-  esan_flags.cpp
-  esan_interface.cpp
-  esan_interceptors.cpp
-  esan_linux.cpp
-  esan_sideline_linux.cpp
-  esan_sideline_bsd.cpp
-  cache_frag.cpp
-  working_set.cpp
-  working_set_posix.cpp)
-
-set(ESAN_HEADERS
-  cache_frag.h
-  esan.h
-  esan_circular_buffer.h
-  esan_flags.h
-  esan_flags.inc
-  esan_hashtable.h
-  esan_interface_internal.h
-  esan_shadow.h
-  esan_sideline.h
-  working_set.h)
-
-foreach (arch ${ESAN_SUPPORTED_ARCH})
-  add_compiler_rt_runtime(clang_rt.esan
-    STATIC
-    ARCHS ${arch}
-    SOURCES ${ESAN_SOURCES}
-            $<TARGET_OBJECTS:RTInterception.${arch}>
-            $<TARGET_OBJECTS:RTSanitizerCommon.${arch}>
-            $<TARGET_OBJECTS:RTSanitizerCommonLibc.${arch}>
-            $<TARGET_OBJECTS:RTSanitizerCommonSymbolizer.${arch}>
-    ADDITIONAL_HEADERS ${ESAN_HEADERS}
-    CFLAGS ${ESAN_RTL_CFLAGS})
-  add_sanitizer_rt_symbols(clang_rt.esan
-    ARCHS ${arch}
-    EXTRA esan.syms.extra)
-  add_dependencies(esan
-    clang_rt.esan-${arch}
-    clang_rt.esan-${arch}-symbols)
-endforeach()
-
-if (COMPILER_RT_INCLUDE_TESTS)
-  # TODO(bruening): add tests via add_subdirectory(tests)
-endif()

compiler-rt/lib/esan/cache_frag.h

-//===-- cache_frag.h --------------------------------------------*- C++ -*-===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-//
-// This file is a part of EfficiencySanitizer, a family of performance tuners.
-//
-// Header for cache-fragmentation-specific code.
-//===----------------------------------------------------------------------===//
-
-#ifndef CACHE_FRAG_H
-#define CACHE_FRAG_H
-
-namespace __esan {
-
-void processCacheFragCompilationUnitInit(void *Ptr);
-void processCacheFragCompilationUnitExit(void *Ptr);
-
-void initializeCacheFrag();
-int finalizeCacheFrag();
-void reportCacheFrag();
-
-} // namespace __esan
-
-#endif  // CACHE_FRAG_H

compiler-rt/lib/esan/cache_frag.cpp

-//===-- cache_frag.cpp ----------------------------------------------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-//
-// This file is a part of EfficiencySanitizer, a family of performance tuners.
-//
-// This file contains cache fragmentation-specific code.
-//===----------------------------------------------------------------------===//
-
-#include "esan.h"
-#include "esan_flags.h"
-#include "sanitizer_common/sanitizer_addrhashmap.h"
-#include "sanitizer_common/sanitizer_common.h"
-#include "sanitizer_common/sanitizer_placement_new.h"
-#include <string.h>
-
-namespace __esan {
-
-//===-- Struct field access counter runtime -------------------------------===//
-
-// This should be kept consistent with LLVM's EfficiencySanitizer StructInfo.
-struct StructInfo {
-  const char *StructName;
-  u32 Size;
-  u32 NumFields;
-  u32 *FieldOffset;           // auxiliary struct field info.
-  u32 *FieldSize;             // auxiliary struct field info.
-  const char **FieldTypeName; // auxiliary struct field info.
-  u64 *FieldCounters;
-  u64 *ArrayCounter;
-  bool hasAuxFieldInfo() { return FieldOffset != nullptr; }
-};
-
-// This should be kept consistent with LLVM's EfficiencySanitizer CacheFragInfo.
-// The tool-specific information per compilation unit (module).
-struct CacheFragInfo {
-  const char *UnitName;
-  u32 NumStructs;
-  StructInfo *Structs;
-};
-
-struct StructCounter {
-  StructInfo *Struct;
-  u64 Count; // The total access count of the struct.
-  u64 Ratio; // Difference ratio for the struct layout access.
-};
-
-// We use StructHashMap to keep track of an unique copy of StructCounter.
-typedef AddrHashMap<StructCounter, 31051> StructHashMap;
-struct Context {
-  StructHashMap StructMap;
-  u32 NumStructs;
-  u64 TotalCount; // The total access count of all structs.
-};
-static Context *Ctx;
-
-static void reportStructSummary() {
-  // FIXME: provide a better struct field access summary report.
-  Report("%s: total struct field access count = %llu\n", SanitizerToolName,
-         Ctx->TotalCount);
-}
-
-// FIXME: we are still exploring proper ways to evaluate the difference between
-// struct field counts.  Currently, we use a simple formula to calculate the
-// difference ratio: V1/V2.
-static inline u64 computeDifferenceRatio(u64 Val1, u64 Val2) {
-  if (Val2 > Val1) {
-    Swap(Val1, Val2);
-  }
-  if (Val2 == 0)
-    Val2 = 1;
-  return (Val1 / Val2);
-}
-
-static void reportStructCounter(StructHashMap::Handle &Handle) {
-  const u32 TypePrintLimit = 512;
-  const char *type, *start, *end;
-  StructInfo *Struct = Handle->Struct;
-  // Union field address calculation is done via bitcast instead of GEP,
-  // so the count for union is always 0.
-  // We skip the union report to avoid confusion.
-  if (strncmp(Struct->StructName, "union.", 6) == 0)
-    return;
-  // Remove the '.' after class/struct during print.
-  if (strncmp(Struct->StructName, "class.", 6) == 0) {
-    type = "class";
-    start = &Struct->StructName[6];
-  } else {
-    type = "struct";
-    start = &Struct->StructName[7];
-  }
-  // Remove the suffixes with '$' during print.
-  end = strchr(start, '$');
-  CHECK(end != nullptr);
-  Report("  %s %.*s\n", type, end - start, start);
-  Report("   size = %u, count = %llu, ratio = %llu, array access = %llu\n",
-         Struct->Size, Handle->Count, Handle->Ratio, *Struct->ArrayCounter);
-  if (Struct->hasAuxFieldInfo()) {
-    for (u32 i = 0; i < Struct->NumFields; ++i) {
-      Report("   #%2u: offset = %u,\t size = %u,"
-             "\t count = %llu,\t type = %.*s\n",
-             i, Struct->FieldOffset[i], Struct->FieldSize[i],
-             Struct->FieldCounters[i], TypePrintLimit, Struct->FieldTypeName[i]);
-    }
-  } else {
-    for (u32 i = 0; i < Struct->NumFields; ++i) {
-      Report("   #%2u: count = %llu\n", i, Struct->FieldCounters[i]);
-    }
-  }
-}
-
-static void computeStructRatio(StructHashMap::Handle &Handle) {
-  Handle->Ratio = 0;
-  Handle->Count = Handle->Struct->FieldCounters[0];
-  for (u32 i = 1; i < Handle->Struct->NumFields; ++i) {
-    Handle->Count += Handle->Struct->FieldCounters[i];
-    Handle->Ratio += computeDifferenceRatio(
-        Handle->Struct->FieldCounters[i - 1], Handle->Struct->FieldCounters[i]);
-  }
-  Ctx->TotalCount += Handle->Count;
-  if (Handle->Ratio >= (u64)getFlags()->report_threshold ||
-      (Verbosity() >= 1 && Handle->Count > 0))
-    reportStructCounter(Handle);
-}
-
-static void registerStructInfo(CacheFragInfo *CacheFrag) {
-  for (u32 i = 0; i < CacheFrag->NumStructs; ++i) {
-    StructInfo *Struct = &CacheFrag->Structs[i];
-    StructHashMap::Handle H(&Ctx->StructMap, (uptr)Struct->FieldCounters);
-    if (H.created()) {
-      VPrintf(2, " Register %s: %u fields\n", Struct->StructName,
-              Struct->NumFields);
-      H->Struct = Struct;
-      ++Ctx->NumStructs;
-    } else {
-      VPrintf(2, " Duplicated %s: %u fields\n", Struct->StructName,
-              Struct->NumFields);
-    }
-  }
-}
-
-static void unregisterStructInfo(CacheFragInfo *CacheFrag) {
-  // FIXME: if the library is unloaded before finalizeCacheFrag, we should
-  // collect the result for later report.
-  for (u32 i = 0; i < CacheFrag->NumStructs; ++i) {
-    StructInfo *Struct = &CacheFrag->Structs[i];
-    StructHashMap::Handle H(&Ctx->StructMap, (uptr)Struct->FieldCounters, true);
-    if (H.exists()) {
-      VPrintf(2, " Unregister %s: %u fields\n", Struct->StructName,
-              Struct->NumFields);
-      // FIXME: we should move this call to finalizeCacheFrag once we can
-      // iterate over the hash map there.
-      computeStructRatio(H);
-      --Ctx->NumStructs;
-    } else {
-      VPrintf(2, " Duplicated %s: %u fields\n", Struct->StructName,
-              Struct->NumFields);
-    }
-  }
-  static bool Reported = false;
-  if (Ctx->NumStructs == 0 && !Reported) {
-    Reported = true;
-    reportStructSummary();
-  }
-}
-
-//===-- Init/exit functions -----------------------------------------------===//
-
-void processCacheFragCompilationUnitInit(void *Ptr) {
-  CacheFragInfo *CacheFrag = (CacheFragInfo *)Ptr;
-  VPrintf(2, "in esan::%s: %s with %u class(es)/struct(s)\n", __FUNCTION__,
-          CacheFrag->UnitName, CacheFrag->NumStructs);
-  registerStructInfo(CacheFrag);
-}
-
-void processCacheFragCompilationUnitExit(void *Ptr) {
-  CacheFragInfo *CacheFrag = (CacheFragInfo *)Ptr;
-  VPrintf(2, "in esan::%s: %s with %u class(es)/struct(s)\n", __FUNCTION__,
-          CacheFrag->UnitName, CacheFrag->NumStructs);
-  unregisterStructInfo(CacheFrag);
-}
-
-void initializeCacheFrag() {
-  VPrintf(2, "in esan::%s\n", __FUNCTION__);
-  // We use placement new to initialize Ctx before C++ static initializaion.
-  // We make CtxMem 8-byte aligned for atomic operations in AddrHashMap.
-  static u64 CtxMem[sizeof(Context) / sizeof(u64) + 1];
-  Ctx = new (CtxMem) Context();
-  Ctx->NumStructs = 0;
-}
-
-int finalizeCacheFrag() {
-  VPrintf(2, "in esan::%s\n", __FUNCTION__);
-  return 0;
-}
-
-void reportCacheFrag() {
-  VPrintf(2, "in esan::%s\n", __FUNCTION__);
-  // FIXME: Not yet implemented.  We need to iterate over all of the
-  // compilation unit data.
-}
-
-} // namespace __esan

compiler-rt/lib/esan/esan.h

-//===-- esan.h --------------------------------------------------*- C++ -*-===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-//
-// This file is a part of EfficiencySanitizer, a family of performance tuners.
-//
-// Main internal esan header file.
-//
-// Ground rules:
-//   - C++ run-time should not be used (static CTORs, RTTI, exceptions, static
-//     function-scope locals)
-//   - All functions/classes/etc reside in namespace __esan, except for those
-//     declared in esan_interface_internal.h.
-//   - Platform-specific files should be used instead of ifdefs (*).
-//   - No system headers included in header files (*).
-//   - Platform specific headers included only into platform-specific files (*).
-//
-//  (*) Except when inlining is critical for performance.
-//===----------------------------------------------------------------------===//
-
-#ifndef ESAN_H
-#define ESAN_H
-
-#include "interception/interception.h"
-#include "sanitizer_common/sanitizer_common.h"
-#include "esan_interface_internal.h"
-
-namespace __esan {
-
-extern bool EsanIsInitialized;
-extern bool EsanDuringInit;
-extern uptr VmaSize;
-
-void initializeLibrary(ToolType Tool);
-int finalizeLibrary();
-void reportResults();
-unsigned int getSampleCount();
-// Esan creates the variable per tool per compilation unit at compile time
-// and passes its pointer Ptr to the runtime library.
-void processCompilationUnitInit(void *Ptr);
-void processCompilationUnitExit(void *Ptr);
-void processRangeAccess(uptr PC, uptr Addr, int Size, bool IsWrite);
-void initializeInterceptors();
-
-// Platform-dependent routines.
-void verifyAddressSpace();
-bool fixMmapAddr(void **Addr, SIZE_T Size, int Flags);
-uptr checkMmapResult(uptr Addr, SIZE_T Size);
-// The return value indicates whether to call the real version or not.
-bool processSignal(int SigNum, void (*Handler)(int), void (**Result)(int));
-bool processSigaction(int SigNum, const void *Act, void *OldAct);
-bool processSigprocmask(int How, void *Set, void *OldSet);
-
-} // namespace __esan
-
-#endif // ESAN_H

compiler-rt/lib/esan/esan.cpp

-//===-- esan.cpp ----------------------------------------------------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-//
-// This file is a part of EfficiencySanitizer, a family of performance tuners.
-//
-// Main file (entry points) for the Esan run-time.
-//===----------------------------------------------------------------------===//
-
-#include "esan.h"
-#include "esan_flags.h"
-#include "esan_interface_internal.h"
-#include "esan_shadow.h"
-#include "cache_frag.h"
-#include "sanitizer_common/sanitizer_common.h"
-#include "sanitizer_common/sanitizer_flag_parser.h"
-#include "sanitizer_common/sanitizer_flags.h"
-#include "working_set.h"
-
-// See comment below.
-extern "C" {
-extern void __cxa_atexit(void (*function)(void));
-}
-
-namespace __esan {
-
-bool EsanIsInitialized;
-bool EsanDuringInit;
-ShadowMapping Mapping;
-
-// Different tools use different scales within the same shadow mapping scheme.
-// The scale used here must match that used by the compiler instrumentation.
-// This array is indexed by the ToolType enum.
-static const uptr ShadowScale[] = {
-  0, // ESAN_None.
-  2, // ESAN_CacheFrag: 4B:1B, so 4 to 1 == >>2.
-  6, // ESAN_WorkingSet: 64B:1B, so 64 to 1 == >>6.
-};
-
-// We are combining multiple performance tuning tools under the umbrella of
-// one EfficiencySanitizer super-tool.  Most of our tools have very similar
-// memory access instrumentation, shadow memory mapping, libc interception,
-// etc., and there is typically more shared code than distinct code.
-//
-// We are not willing to dispatch on tool dynamically in our fastpath
-// instrumentation: thus, which tool to use is a static option selected
-// at compile time and passed to __esan_init().
-//
-// We are willing to pay the overhead of tool dispatch in the slowpath to more
-// easily share code.  We expect to only come here rarely.
-// If this becomes a performance hit, we can add separate interface
-// routines for each subtool (e.g., __esan_cache_frag_aligned_load_4).
-// But for libc interceptors, we'll have to do one of the following:
-// A) Add multiple-include support to sanitizer_common_interceptors.inc,
-//    instantiate it separately for each tool, and call the selected
-//    tool's intercept setup code.
-// B) Build separate static runtime libraries, one for each tool.
-// C) Completely split the tools into separate sanitizers.
-
-void processRangeAccess(uptr PC, uptr Addr, int Size, bool IsWrite) {
-  VPrintf(3, "in esan::%s %p: %c %p %d\n", __FUNCTION__, PC,
-          IsWrite ? 'w' : 'r', Addr, Size);
-  if (__esan_which_tool == ESAN_CacheFrag) {
-    // TODO(bruening): add shadow mapping and update shadow bits here.
-    // We'll move this to cache_frag.cpp once we have something.
-  } else if (__esan_which_tool == ESAN_WorkingSet) {
-    processRangeAccessWorkingSet(PC, Addr, Size, IsWrite);
-  }
-}
-
-bool processSignal(int SigNum, void (*Handler)(int), void (**Result)(int)) {
-  if (__esan_which_tool == ESAN_WorkingSet)
-    return processWorkingSetSignal(SigNum, Handler, Result);
-  return true;
-}
-
-bool processSigaction(int SigNum, const void *Act, void *OldAct) {
-  if (__esan_which_tool == ESAN_WorkingSet)
-    return processWorkingSetSigaction(SigNum, Act, OldAct);
-  return true;
-}
-
-bool processSigprocmask(int How, void *Set, void *OldSet) {
-  if (__esan_which_tool == ESAN_WorkingSet)
-    return processWorkingSetSigprocmask(How, Set, OldSet);
-  return true;
-}
-
-#if SANITIZER_DEBUG
-static bool verifyShadowScheme() {
-  // Sanity checks for our shadow mapping scheme.
-  uptr AppStart, AppEnd;
-  if (Verbosity() >= 3) {
-    for (int i = 0; getAppRegion(i, &AppStart, &AppEnd); ++i) {
-      VPrintf(3, "App #%d: [%zx-%zx) (%zuGB)\n", i, AppStart, AppEnd,
-              (AppEnd - AppStart) >> 30);
-    }
-  }
-  for (int Scale = 0; Scale < 8; ++Scale) {
-    Mapping.initialize(Scale);
-    if (Verbosity() >= 3) {
-      VPrintf(3, "\nChecking scale %d\n", Scale);
-      uptr ShadowStart, ShadowEnd;
-      for (int i = 0; getShadowRegion(i, &ShadowStart, &ShadowEnd); ++i) {
-        VPrintf(3, "Shadow #%d: [%zx-%zx) (%zuGB)\n", i, ShadowStart,
-                ShadowEnd, (ShadowEnd - ShadowStart) >> 30);
-      }
-      for (int i = 0; getShadowRegion(i, &ShadowStart, &ShadowEnd); ++i) {
-        VPrintf(3, "Shadow(Shadow) #%d: [%zx-%zx)\n", i,
-                appToShadow(ShadowStart), appToShadow(ShadowEnd - 1)+1);
-      }
-    }
-    for (int i = 0; getAppRegion(i, &AppStart, &AppEnd); ++i) {
-      DCHECK(isAppMem(AppStart));
-      DCHECK(!isAppMem(AppStart - 1));
-      DCHECK(isAppMem(AppEnd - 1));
-      DCHECK(!isAppMem(AppEnd));
-      DCHECK(!isShadowMem(AppStart));
-      DCHECK(!isShadowMem(AppEnd - 1));
-      DCHECK(isShadowMem(appToShadow(AppStart)));
-      DCHECK(isShadowMem(appToShadow(AppEnd - 1)));
-      // Double-shadow checks.
-      DCHECK(!isShadowMem(appToShadow(appToShadow(AppStart))));
-      DCHECK(!isShadowMem(appToShadow(appToShadow(AppEnd - 1))));
-    }
-    // Ensure no shadow regions overlap each other.
-    uptr ShadowAStart, ShadowBStart, ShadowAEnd, ShadowBEnd;
-    for (int i = 0; getShadowRegion(i, &ShadowAStart, &ShadowAEnd); ++i) {
-      for (int j = 0; getShadowRegion(j, &ShadowBStart, &ShadowBEnd); ++j) {
-        DCHECK(i == j || ShadowAStart >= ShadowBEnd ||
-               ShadowAEnd <= ShadowBStart);
-      }
-    }
-  }
-  return true;
-}
-#endif
-
-uptr VmaSize;
-
-static void initializeShadow() {
-  verifyAddressSpace();
-
-  // This is based on the assumption that the intial stack is always allocated
-  // in the topmost segment of the user address space and the assumption
-  // holds true on all the platforms currently supported.
-  VmaSize =
-    (MostSignificantSetBitIndex(GET_CURRENT_FRAME()) + 1);
-
-  DCHECK(verifyShadowScheme());
-
-  Mapping.initialize(ShadowScale[__esan_which_tool]);
-
-  VPrintf(1, "Shadow scale=%d offset=%p\n", Mapping.Scale, Mapping.Offset);
-
-  uptr ShadowStart, ShadowEnd;
-  for (int i = 0; getShadowRegion(i, &ShadowStart, &ShadowEnd); ++i) {
-    VPrintf(1, "Shadow #%d: [%zx-%zx) (%zuGB)\n", i, ShadowStart, ShadowEnd,
-            (ShadowEnd - ShadowStart) >> 30);
-
-    uptr Map = 0;
-    if (__esan_which_tool == ESAN_WorkingSet) {
-      // We want to identify all shadow pages that are touched so we start
-      // out inaccessible.
-      Map = (uptr)MmapFixedNoAccess(ShadowStart, ShadowEnd- ShadowStart,
-                                    "shadow");
-    } else {
-      if (MmapFixedNoReserve(ShadowStart, ShadowEnd - ShadowStart, "shadow"))
-        Map = ShadowStart;
-    }
-    if (Map != ShadowStart) {
-      Printf("FATAL: EfficiencySanitizer failed to map its shadow memory.\n");
-      Die();
-    }
-
-    if (common_flags()->no_huge_pages_for_shadow)
-      NoHugePagesInRegion(ShadowStart, ShadowEnd - ShadowStart);
-    if (common_flags()->use_madv_dontdump)
-      DontDumpShadowMemory(ShadowStart, ShadowEnd - ShadowStart);
-
-    // TODO: Call MmapNoAccess() on in-between regions.
-  }
-}
-
-void initializeLibrary(ToolType Tool) {
-  // We assume there is only one thread during init, but we need to
-  // guard against double-init when we're (re-)called from an
-  // early interceptor.
-  if (EsanIsInitialized || EsanDuringInit)
-    return;
-  EsanDuringInit = true;
-  CHECK(Tool == __esan_which_tool);
-  SanitizerToolName = "EfficiencySanitizer";
-  CacheBinaryName();
-  initializeFlags();
-
-  // Intercepting libc _exit or exit via COMMON_INTERCEPTOR_ON_EXIT only
-  // finalizes on an explicit exit call by the app.  To handle a normal
-  // exit we register an atexit handler.
-  ::__cxa_atexit((void (*)())finalizeLibrary);
-
-  VPrintf(1, "in esan::%s\n", __FUNCTION__);
-  if (__esan_which_tool <= ESAN_None || __esan_which_tool >= ESAN_Max) {
-    Printf("ERROR: unknown tool %d requested\n", __esan_which_tool);
-    Die();
-  }
-
-  initializeShadow();
-  if (__esan_which_tool == ESAN_WorkingSet)
-    initializeShadowWorkingSet();
-
-  initializeInterceptors();
-
-  if (__esan_which_tool == ESAN_CacheFrag) {
-    initializeCacheFrag();
-  } else if (__esan_which_tool == ESAN_WorkingSet) {
-    initializeWorkingSet();
-  }
-
-  EsanIsInitialized = true;
-  EsanDuringInit = false;
-}
-
-int finalizeLibrary() {
-  VPrintf(1, "in esan::%s\n", __FUNCTION__);
-  if (__esan_which_tool == ESAN_CacheFrag) {
-    return finalizeCacheFrag();
-  } else if (__esan_which_tool == ESAN_WorkingSet) {
-    return finalizeWorkingSet();
-  }
-  return 0;
-}
-
-void reportResults() {
-  VPrintf(1, "in esan::%s\n", __FUNCTION__);
-  if (__esan_which_tool == ESAN_CacheFrag) {
-    return reportCacheFrag();
-  } else if (__esan_which_tool == ESAN_WorkingSet) {
-    return reportWorkingSet();
-  }
-}
-
-void processCompilationUnitInit(void *Ptr) {
-  VPrintf(2, "in esan::%s\n", __FUNCTION__);
-  if (__esan_which_tool == ESAN_CacheFrag) {
-    DCHECK(Ptr != nullptr);
-    processCacheFragCompilationUnitInit(Ptr);
-  } else {
-    DCHECK(Ptr == nullptr);
-  }
-}
-
-// This is called when the containing module is unloaded.
-// For the main executable module, this is called after finalizeLibrary.
-void processCompilationUnitExit(void *Ptr) {
-  VPrintf(2, "in esan::%s\n", __FUNCTION__);
-  if (__esan_which_tool == ESAN_CacheFrag) {
-    DCHECK(Ptr != nullptr);
-    processCacheFragCompilationUnitExit(Ptr);
-  } else {
-    DCHECK(Ptr == nullptr);
-  }
-}
-
-unsigned int getSampleCount() {
-  VPrintf(1, "in esan::%s\n", __FUNCTION__);
-  if (__esan_which_tool == ESAN_WorkingSet) {
-    return getSampleCountWorkingSet();
-  }
-  return 0;
-}
-
-} // namespace __esan

compiler-rt/lib/esan/esan.syms.extra

-__esan_init
-__esan_exit
-__esan_aligned*
-__esan_unaligned*

compiler-rt/lib/esan/esan_circular_buffer.h

-//===-- esan_circular_buffer.h ----------------------------------*- C++ -*-===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-//
-// This file is a part of EfficiencySanitizer, a family of performance tuners.
-//
-// Circular buffer data structure.
-//===----------------------------------------------------------------------===//
-
-#include "sanitizer_common/sanitizer_common.h"
-
-namespace __esan {
-
-// A circular buffer for POD data whose memory is allocated using mmap.
-// There are two usage models: one is to use initialize/free (for global
-// instances) and the other is to use placement new with the
-// constructor and to call the destructor or free (they are equivalent).
-template<typename T>
-class CircularBuffer {
- public:
-  // To support global instances we cannot initialize any field in the
-  // default constructor.
-  explicit CircularBuffer() {}
-  CircularBuffer(uptr BufferCapacity) {
-    initialize(BufferCapacity);
-    WasConstructed = true;
-  }
-  ~CircularBuffer() {
-    if (WasConstructed) // Else caller will call free() explicitly.
-      free();
-  }
-  void initialize(uptr BufferCapacity) {
-    Capacity = BufferCapacity;
-    // MmapOrDie rounds up to the page size for us.
-    Data = (T *)MmapOrDie(Capacity * sizeof(T), "CircularBuffer");
-    StartIdx = 0;
-    Count = 0;
-    WasConstructed = false;
-  }
-  void free() {
-    UnmapOrDie(Data, Capacity * sizeof(T));
-  }
-  T &operator[](uptr Idx) {
-    CHECK_LT(Idx, Count);
-    uptr ArrayIdx = (StartIdx + Idx) % Capacity;
-    return Data[ArrayIdx];
-  }
-  const T &operator[](uptr Idx) const {
-    CHECK_LT(Idx, Count);
-    uptr ArrayIdx = (StartIdx + Idx) % Capacity;
-    return Data[ArrayIdx];
-  }
-  void push_back(const T &Item) {
-    CHECK_GT(Capacity, 0);
-    uptr ArrayIdx = (StartIdx + Count) % Capacity;
-    Data[ArrayIdx] = Item;
-    if (Count < Capacity)
-      ++Count;
-    else
-      StartIdx = (StartIdx + 1) % Capacity;
-  }
-  T &back() {
-    CHECK_GT(Count, 0);
-    uptr ArrayIdx = (StartIdx + Count - 1) % Capacity;
-    return Data[ArrayIdx];
-  }
-  void pop_back() {
-    CHECK_GT(Count, 0);
-    --Count;
-  }
-  uptr size() const {
-    return Count;
-  }
-  void clear() {
-    StartIdx = 0;
-    Count = 0;
-  }
-  bool empty() const { return size() == 0; }
-
- private:
-  CircularBuffer(const CircularBuffer&);
-  void operator=(const CircularBuffer&);
-
-  bool WasConstructed;
-  T *Data;
-  uptr Capacity;
-  uptr StartIdx;
-  uptr Count;
-};
-
-} // namespace __esan

compiler-rt/lib/esan/esan_flags.h

-//===-- esan_flags.h --------------------------------------------*- C++ -*-===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-//
-// This file is a part of EfficiencySanitizer, a family of performance tuners.
-//
-// Esan runtime flags.
-//===----------------------------------------------------------------------===//
-
-#ifndef ESAN_FLAGS_H
-#define ESAN_FLAGS_H
-
-#include "sanitizer_common/sanitizer_internal_defs.h"
-#include "sanitizer_common/sanitizer_flag_parser.h"
-
-namespace __esan {
-
-class Flags {
-public:
-#define ESAN_FLAG(Type, Name, DefaultValue, Description) Type Name;
-#include "esan_flags.inc"
-#undef ESAN_FLAG
-
-  void setDefaults();
-};
-
-extern Flags EsanFlagsDontUseDirectly;
-inline Flags *getFlags() {
-  return &EsanFlagsDontUseDirectly;
-}
-
-void initializeFlags();
-
-} // namespace __esan
-
-#endif // ESAN_FLAGS_H

compiler-rt/lib/esan/esan_flags.cpp

-//===-- esan_flags.cc -------------------------------------------*- C++ -*-===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-//
-// This file is a part of EfficiencySanitizer, a family of performance tuners.
-//
-// Esan flag parsing logic.
-//===----------------------------------------------------------------------===//
-
-#include "esan_flags.h"
-#include "sanitizer_common/sanitizer_common.h"
-#include "sanitizer_common/sanitizer_flag_parser.h"
-#include "sanitizer_common/sanitizer_flags.h"
-
-using namespace __sanitizer;
-
-namespace __esan {
-
-static const char EsanOptsEnv[] = "ESAN_OPTIONS";
-
-Flags EsanFlagsDontUseDirectly;
-
-void Flags::setDefaults() {
-#define ESAN_FLAG(Type, Name, DefaultValue, Description) Name = DefaultValue;
-#include "esan_flags.inc"
-#undef ESAN_FLAG
-}
-
-static void registerEsanFlags(FlagParser *Parser, Flags *F) {
-#define ESAN_FLAG(Type, Name, DefaultValue, Description) \
-  RegisterFlag(Parser, #Name, Description, &F->Name);
-#include "esan_flags.inc"
-#undef ESAN_FLAG
-}
-
-void initializeFlags() {
-  SetCommonFlagsDefaults();
-  Flags *F = getFlags();
-  F->setDefaults();
-
-  FlagParser Parser;
-  registerEsanFlags(&Parser, F);
-  RegisterCommonFlags(&Parser);
-  Parser.ParseString(GetEnv(EsanOptsEnv));
-
-  InitializeCommonFlags();
-  if (Verbosity())
-    ReportUnrecognizedFlags();
-  if (common_flags()->help)
-    Parser.PrintFlagDescriptions();
-
-  __sanitizer_set_report_path(common_flags()->log_path);
-}
-
-} // namespace __esan

compiler-rt/lib/esan/esan_flags.inc

-//===-- esan_flags.inc ------------------------------------------*- C++ -*-===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-//
-// Esan runtime flags.
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef ESAN_FLAG
-# error "Define ESAN_FLAG prior to including this file!"
-#endif
-
-// ESAN_FLAG(Type, Name, DefaultValue, Description)
-// See COMMON_FLAG in sanitizer_flags.inc for more details.
-
-//===----------------------------------------------------------------------===//
-// Cross-tool options
-//===----------------------------------------------------------------------===//
-
-ESAN_FLAG(int, cache_line_size, 64,
-          "The number of bytes in a cache line.  For the working-set tool, this "
-          "cannot be changed without also changing the compiler "
-          "instrumentation.")
-
-//===----------------------------------------------------------------------===//
-// Working set tool options
-//===----------------------------------------------------------------------===//
-
-ESAN_FLAG(bool, record_snapshots, true,
-          "Working set tool: whether to sample snapshots during a run.")
-
-// Typical profiling uses a 10ms timer.  Our snapshots take some work
-// to scan memory so we reduce to 20ms.
-// To disable samples, turn off record_snapshots.
-ESAN_FLAG(int, sample_freq, 20,
-          "Working set tool: sampling frequency in milliseconds.")
-
-// This controls the difference in frequency between each successive series
-// of snapshots.  There are 8 in total, with number 0 using sample_freq.
-// Number N samples number N-1 every (1 << snapshot_step) instance of N-1.
-ESAN_FLAG(int, snapshot_step, 2, "Working set tool: the log of the sampling "
-          "performed for the next-higher-frequency snapshot series.")
-
-//===----------------------------------------------------------------------===//
-// Cache Fragmentation tool options
-//===----------------------------------------------------------------------===//
-
-// The difference information of a struct is reported if the struct's difference
-// score is greater than the report_threshold.
-ESAN_FLAG(int, report_threshold, 1<<10, "Cache-frag tool: the struct difference"
-          " score threshold for reporting.")

compiler-rt/lib/esan/esan_hashtable.h

-//===-- esan_hashtable.h ----------------------------------------*- C++ -*-===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-//
-// This file is a part of EfficiencySanitizer, a family of performance tuners.
-//
-// Generic resizing hashtable.
-//===----------------------------------------------------------------------===//
-
-#include "sanitizer_common/sanitizer_allocator_internal.h"
-#include "sanitizer_common/sanitizer_internal_defs.h"
-#include "sanitizer_common/sanitizer_mutex.h"
-#include <stddef.h>
-
-namespace __esan {
-
-//===----------------------------------------------------------------------===//
-// Default hash and comparison functions
-//===----------------------------------------------------------------------===//
-
-template <typename T> struct DefaultHash {
-  size_t operator()(const T &Key) const {
-    return (size_t)Key;
-  }
-};
-
-template <typename T> struct DefaultEqual {
-  bool operator()(const T &Key1, const T &Key2) const {
-    return Key1 == Key2;
-  }
-};
-
-//===----------------------------------------------------------------------===//
-// HashTable declaration
-//===----------------------------------------------------------------------===//
-
-// A simple resizing and mutex-locked hashtable.
-//
-// If the default hash functor is used, KeyTy must have an operator size_t().
-// If the default comparison functor is used, KeyTy must have an operator ==.
-//
-// By default all operations are internally-synchronized with a mutex, with no
-// synchronization for payloads once hashtable functions return.  If
-// ExternalLock is set to true, the caller should call the lock() and unlock()
-// routines around all hashtable operations and subsequent manipulation of
-// payloads.
-template <typename KeyTy, typename DataTy, bool ExternalLock = false,
-          typename HashFuncTy = DefaultHash<KeyTy>,
-          typename EqualFuncTy = DefaultEqual<KeyTy> >
-class HashTable {
-public:
-  // InitialCapacity must be a power of 2.
-  // ResizeFactor must be between 1 and 99 and indicates the
-  // maximum percentage full that the table should ever be.
-  HashTable(u32 InitialCapacity = 2048, u32 ResizeFactor = 70);
-  ~HashTable();
-  bool lookup(const KeyTy &Key, DataTy &Payload); // Const except for Mutex.
-  bool add(const KeyTy &Key, const DataTy &Payload);
-  bool remove(const KeyTy &Key);
-  u32 size(); // Const except for Mutex.
-  // If the table is internally-synchronized, this lock must not be held
-  // while a hashtable function is called as it will deadlock: the lock
-  // is not recursive.  This is meant for use with externally-synchronized
-  // tables or with an iterator.
-  void lock();
-  void unlock();
-
-private:
-  struct HashEntry {
-    KeyTy Key;
-    DataTy Payload;
-    HashEntry *Next;
-  };
-
-public:
-  struct HashPair {
-    HashPair(KeyTy Key, DataTy Data) : Key(Key), Data(Data) {}
-    KeyTy Key;
-    DataTy Data;
-  };
-
-  // This iterator does not perform any synchronization.
-  // It expects the caller to lock the table across the whole iteration.
-  // Calling HashTable functions while using the iterator is not supported.
-  // The iterator returns copies of the keys and data.
-  class iterator {
-  public:
-    iterator(
-        HashTable<KeyTy, DataTy, ExternalLock, HashFuncTy, EqualFuncTy> *Table);
-    iterator(const iterator &Src) = default;
-    iterator &operator=(const iterator &Src) = default;
-    HashPair operator*();
-    iterator &operator++();
-    iterator &operator++(int);
-    bool operator==(const iterator &Cmp) const;
-    bool operator!=(const iterator &Cmp) const;
-
-  private:
-    iterator(
-        HashTable<KeyTy, DataTy, ExternalLock, HashFuncTy, EqualFuncTy> *Table,
-        int Idx);
-    friend HashTable<KeyTy, DataTy, ExternalLock, HashFuncTy, EqualFuncTy>;
-    HashTable<KeyTy, DataTy, ExternalLock, HashFuncTy, EqualFuncTy> *Table;
-    int Idx;
-    HashTable<KeyTy, DataTy, ExternalLock, HashFuncTy, EqualFuncTy>::HashEntry
-        *Entry;
-  };
-
-  // No erase or insert iterator supported
-  iterator begin();
-  iterator end();
-
-private:
-  void resize();
-
-  HashEntry **Table;
-  u32 Capacity;
-  u32 Entries;
-  const u32 ResizeFactor;
-  BlockingMutex Mutex;
-  const HashFuncTy HashFunc;
-  const EqualFuncTy EqualFunc;
-};
-
-//===----------------------------------------------------------------------===//
-// Hashtable implementation
-//===----------------------------------------------------------------------===//
-
-template <typename KeyTy, typename DataTy, bool ExternalLock,
-          typename HashFuncTy, typename EqualFuncTy>
-HashTable<KeyTy, DataTy, ExternalLock, HashFuncTy, EqualFuncTy>::HashTable(
-    u32 InitialCapacity, u32 ResizeFactor)
-    : Capacity(InitialCapacity), Entries(0), ResizeFactor(ResizeFactor),
-      HashFunc(HashFuncTy()), EqualFunc(EqualFuncTy()) {
-  CHECK(IsPowerOfTwo(Capacity));
-  CHECK(ResizeFactor >= 1 && ResizeFactor <= 99);
-  Table = (HashEntry **)InternalAlloc(Capacity * sizeof(HashEntry *));
-  internal_memset(Table, 0, Capacity * sizeof(HashEntry *));
-}
-
-template <typename KeyTy, typename DataTy, bool ExternalLock,
-          typename HashFuncTy, typename EqualFuncTy>
-HashTable<KeyTy, DataTy, ExternalLock, HashFuncTy, EqualFuncTy>::~HashTable() {
-  for (u32 i = 0; i < Capacity; ++i) {
-    HashEntry *Entry = Table[i];
-    while (Entry != nullptr) {
-      HashEntry *Next = Entry->Next;
-      Entry->Payload.~DataTy();
-      InternalFree(Entry);
-      Entry = Next;
-    }
-  }
-  InternalFree(Table);
-}
-
-template <typename KeyTy, typename DataTy, bool ExternalLock,
-          typename HashFuncTy, typename EqualFuncTy>
-u32 HashTable<KeyTy, DataTy, ExternalLock, HashFuncTy, EqualFuncTy>::size() {
-  u32 Res;
-  if (!ExternalLock)
-    Mutex.Lock();
-  Res = Entries;
-  if (!ExternalLock)
-    Mutex.Unlock();
-  return Res;
-}
-
-template <typename KeyTy, typename DataTy, bool ExternalLock,
-          typename HashFuncTy, typename EqualFuncTy>
-bool HashTable<KeyTy, DataTy, ExternalLock, HashFuncTy, EqualFuncTy>::lookup(
-    const KeyTy &Key, DataTy &Payload) {
-  if (!ExternalLock)
-    Mutex.Lock();
-  bool Found = false;
-  size_t Hash = HashFunc(Key) % Capacity;
-  HashEntry *Entry = Table[Hash];
-  for (; Entry != nullptr; Entry = Entry->Next) {
-    if (EqualFunc(Entry->Key, Key)) {
-      Payload = Entry->Payload;
-      Found = true;
-      break;
-    }
-  }
-  if (!ExternalLock)
-    Mutex.Unlock();
-  return Found;
-}
-
-template <typename KeyTy, typename DataTy, bool ExternalLock,
-          typename HashFuncTy, typename EqualFuncTy>
-void HashTable<KeyTy, DataTy, ExternalLock, HashFuncTy, EqualFuncTy>::resize() {
-  if (!ExternalLock)
-    Mutex.CheckLocked();
-  size_t OldCapacity = Capacity;
-  HashEntry **OldTable = Table;
-  Capacity *= 2;
-  Table = (HashEntry **)InternalAlloc(Capacity * sizeof(HashEntry *));
-  internal_memset(Table, 0, Capacity * sizeof(HashEntry *));
-  // Re-hash
-  for (u32 i = 0; i < OldCapacity; ++i) {
-    HashEntry *OldEntry = OldTable[i];
-    while (OldEntry != nullptr) {
-      HashEntry *Next = OldEntry->Next;
-      size_t Hash = HashFunc(OldEntry->Key) % Capacity;
-      OldEntry->Next = Table[Hash];
-      Table[Hash] = OldEntry;
-      OldEntry = Next;
-    }
-  }
-}
-
-template <typename KeyTy, typename DataTy, bool ExternalLock,
-          typename HashFuncTy, typename EqualFuncTy>
-bool HashTable<KeyTy, DataTy, ExternalLock, HashFuncTy, EqualFuncTy>::add(
-    const KeyTy &Key, const DataTy &Payload) {
-  if (!ExternalLock)
-    Mutex.Lock();
-  bool Exists = false;
-  size_t Hash = HashFunc(Key) % Capacity;
-  HashEntry *Entry = Table[Hash];
-  for (; Entry != nullptr; Entry = Entry->Next) {
-    if (EqualFunc(Entry->Key, Key)) {
-      Exists = true;
-      break;
-    }
-  }
-  if (!Exists) {
-    Entries++;
-    if (Entries * 100 >= Capacity * ResizeFactor) {
-      resize();
-      Hash = HashFunc(Key) % Capacity;
-    }
-    HashEntry *Add = (HashEntry *)InternalAlloc(sizeof(*Add));
-    Add->Key = Key;
-    Add->Payload = Payload;
-    Add->Next = Table[Hash];
-    Table[Hash] = Add;
-  }
-  if (!ExternalLock)
-    Mutex.Unlock();
-  return !Exists;
-}
-
-template <typename KeyTy, typename DataTy, bool ExternalLock,
-          typename HashFuncTy, typename EqualFuncTy>
-bool HashTable<KeyTy, DataTy, ExternalLock, HashFuncTy, EqualFuncTy>::remove(
-    const KeyTy &Key) {
-  if (!ExternalLock)
-    Mutex.Lock();
-  bool Found = false;
-  size_t Hash = HashFunc(Key) % Capacity;
-  HashEntry *Entry = Table[Hash];
-  HashEntry *Prev = nullptr;
-  for (; Entry != nullptr; Prev = Entry, Entry = Entry->Next) {
-    if (EqualFunc(Entry->Key, Key)) {
-      Found = true;
-      Entries--;
-      if (Prev == nullptr)
-        Table[Hash] = Entry->Next;
-      else
-        Prev->Next = Entry->Next;
-      Entry->Payload.~DataTy();
-      InternalFree(Entry);
-      break;
-    }
-  }
-  if (!ExternalLock)
-    Mutex.Unlock();
-  return Found;
-}
-
-template <typename KeyTy, typename DataTy, bool ExternalLock,
-          typename HashFuncTy, typename EqualFuncTy>
-void HashTable<KeyTy, DataTy, ExternalLock, HashFuncTy, EqualFuncTy>::lock() {
-  Mutex.Lock();
-}
-
-template <typename KeyTy, typename DataTy, bool ExternalLock,
-          typename HashFuncTy, typename EqualFuncTy>
-void HashTable<KeyTy, DataTy, ExternalLock, HashFuncTy, EqualFuncTy>::unlock() {
-  Mutex.Unlock();
-}
-
-//===----------------------------------------------------------------------===//
-// Iterator implementation
-//===----------------------------------------------------------------------===//
-
-template <typename KeyTy, typename DataTy, bool ExternalLock,
-          typename HashFuncTy, typename EqualFuncTy>
-HashTable<KeyTy, DataTy, ExternalLock, HashFuncTy, EqualFuncTy>::iterator::
-    iterator(
-        HashTable<KeyTy, DataTy, ExternalLock, HashFuncTy, EqualFuncTy> *Table)
-    : Table(Table), Idx(-1), Entry(nullptr) {
-  operator++();
-}
-
-template <typename KeyTy, typename DataTy, bool ExternalLock,
-          typename HashFuncTy, typename EqualFuncTy>
-HashTable<KeyTy, DataTy, ExternalLock, HashFuncTy, EqualFuncTy>::iterator::
-    iterator(
-        HashTable<KeyTy, DataTy, ExternalLock, HashFuncTy, EqualFuncTy> *Table,
-        int Idx)
-    : Table(Table), Idx(Idx), Entry(nullptr) {
-  CHECK(Idx >= (int)Table->Capacity); // Only used to create end().
-}
-
-template <typename KeyTy, typename DataTy, bool ExternalLock,
-          typename HashFuncTy, typename EqualFuncTy>
-typename HashTable<KeyTy, DataTy, ExternalLock, HashFuncTy,
-                   EqualFuncTy>::HashPair
-    HashTable<KeyTy, DataTy, ExternalLock, HashFuncTy, EqualFuncTy>::iterator::
-    operator*() {
-  CHECK(Idx >= 0 && Idx < (int)Table->Capacity);
-  CHECK(Entry != nullptr);
-  return HashPair(Entry->Key, Entry->Payload);
-}
-
-template <typename KeyTy, typename DataTy, bool ExternalLock,
-          typename HashFuncTy, typename EqualFuncTy>
-typename HashTable<KeyTy, DataTy, ExternalLock, HashFuncTy,
-                   EqualFuncTy>::iterator &
-    HashTable<KeyTy, DataTy, ExternalLock, HashFuncTy, EqualFuncTy>::iterator::
-    operator++() {
-  if (Entry != nullptr)
-    Entry = Entry->Next;
-  while (Entry == nullptr) {
-    ++Idx;
-    if (Idx >= (int)Table->Capacity)
-      break; // At end().
-    Entry = Table->Table[Idx];
-  }
-  return *this;
-}
-
-template <typename KeyTy, typename DataTy, bool ExternalLock,
-          typename HashFuncTy, typename EqualFuncTy>
-typename HashTable<KeyTy, DataTy, ExternalLock, HashFuncTy,
-                   EqualFuncTy>::iterator &
-    HashTable<KeyTy, DataTy, ExternalLock, HashFuncTy, EqualFuncTy>::iterator::
-    operator++(int) {
-  iterator Temp(*this);
-  operator++();
-  return Temp;
-}
-
-template <typename KeyTy, typename DataTy, bool ExternalLock,
-          typename HashFuncTy, typename EqualFuncTy>
-bool HashTable<KeyTy, DataTy, ExternalLock, HashFuncTy, EqualFuncTy>::iterator::
-operator==(const iterator &Cmp) const {
-  return Cmp.Table == Table && Cmp.Idx == Idx && Cmp.Entry == Entry;
-}
-
-template <typename KeyTy, typename DataTy, bool ExternalLock,
-          typename HashFuncTy, typename EqualFuncTy>
-bool HashTable<KeyTy, DataTy, ExternalLock, HashFuncTy, EqualFuncTy>::iterator::
-operator!=(const iterator &Cmp) const {
-  return Cmp.Table != Table || Cmp.Idx != Idx || Cmp.Entry != Entry;
-}
-
-template <typename KeyTy, typename DataTy, bool ExternalLock,
-          typename HashFuncTy, typename EqualFuncTy>
-typename HashTable<KeyTy, DataTy, ExternalLock, HashFuncTy,
-                   EqualFuncTy>::iterator
-HashTable<KeyTy, DataTy, ExternalLock, HashFuncTy, EqualFuncTy>::begin() {
-  return iterator(this);
-}
-
-template <typename KeyTy, typename DataTy, bool ExternalLock,
-          typename HashFuncTy, typename EqualFuncTy>
-typename HashTable<KeyTy, DataTy, ExternalLock, HashFuncTy,
-                   EqualFuncTy>::iterator
-HashTable<KeyTy, DataTy, ExternalLock, HashFuncTy, EqualFuncTy>::end() {
-  return iterator(this, Capacity);
-}
-
-} // namespace __esan

compiler-rt/lib/esan/esan_interceptors.cpp

-//===-- esan_interceptors.cpp ---------------------------------------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-//
-// This file is a part of EfficiencySanitizer, a family of performance tuners.
-//
-// Interception routines for the esan run-time.
-//===----------------------------------------------------------------------===//
-
-#include "esan.h"
-#include "esan_shadow.h"
-#include "interception/interception.h"
-#include "sanitizer_common/sanitizer_common.h"
-#include "sanitizer_common/sanitizer_libc.h"
-#include "sanitizer_common/sanitizer_linux.h"
-#include "sanitizer_common/sanitizer_stacktrace.h"
-
-using namespace __esan; // NOLINT
-
-#define CUR_PC() (StackTrace::GetCurrentPc())
-
-//===----------------------------------------------------------------------===//
-// Interception via sanitizer common interceptors
-//===----------------------------------------------------------------------===//
-
-// Get the per-platform defines for what is possible to intercept
-#include "sanitizer_common/sanitizer_platform_interceptors.h"
-
-DECLARE_REAL_AND_INTERCEPTOR(void *, malloc, uptr)
-
-// TODO(bruening): tsan disables several interceptors (getpwent, etc.) claiming
-// that interception is a perf hit: should we do the same?
-
-// We have no need to intercept:
-#undef SANITIZER_INTERCEPT_TLS_GET_ADDR
-
-// TODO(bruening): the common realpath interceptor assumes malloc is
-// intercepted!  We should try to parametrize that, though we'll
-// intercept malloc soon ourselves and can then remove this undef.
-#undef SANITIZER_INTERCEPT_REALPATH
-
-// We provide our own version:
-#undef SANITIZER_INTERCEPT_SIGPROCMASK
-#undef SANITIZER_INTERCEPT_PTHREAD_SIGMASK
-
-#define COMMON_INTERCEPTOR_NOTHING_IS_INITIALIZED (!EsanIsInitialized)
-
-#define COMMON_INTERCEPT_FUNCTION(name) INTERCEPT_FUNCTION(name)
-#define COMMON_INTERCEPT_FUNCTION_VER(name, ver)                          \
-  INTERCEPT_FUNCTION_VER(name, ver)
-
-// We must initialize during early interceptors, to support tcmalloc.
-// This means that for some apps we fully initialize prior to
-// __esan_init() being called.
-// We currently do not use ctx.
-#define COMMON_INTERCEPTOR_ENTER(ctx, func, ...)                               \
-  do {                                                                         \
-    if (UNLIKELY(COMMON_INTERCEPTOR_NOTHING_IS_INITIALIZED)) {                 \
-      if (!UNLIKELY(EsanDuringInit))                                           \
-        initializeLibrary(__esan_which_tool);                                  \
-      return REAL(func)(__VA_ARGS__);                                          \
-    }                                                                          \
-    ctx = nullptr;                                                             \
-    (void)ctx;                                                                 \
-  } while (false)
-
-#define COMMON_INTERCEPTOR_ENTER_NOIGNORE(ctx, func, ...)                      \
-  COMMON_INTERCEPTOR_ENTER(ctx, func, __VA_ARGS__)
-
-#define COMMON_INTERCEPTOR_WRITE_RANGE(ctx, ptr, size)                         \
-  processRangeAccess(CUR_PC(), (uptr)ptr, size, true)
-
-#define COMMON_INTERCEPTOR_READ_RANGE(ctx, ptr, size)                          \
-  processRangeAccess(CUR_PC(), (uptr)ptr, size, false)
-
-// This is only called if the app explicitly calls exit(), not on
-// a normal exit.
-#define COMMON_INTERCEPTOR_ON_EXIT(ctx) finalizeLibrary()
-
-#define COMMON_INTERCEPTOR_FILE_OPEN(ctx, file, path)                          \
-  do {                                                                         \
-    (void)(ctx);                                                               \
-    (void)(file);                                                              \
-    (void)(path);                                                              \
-  } while (false)
-#define COMMON_INTERCEPTOR_FILE_CLOSE(ctx, file)                               \
-  do {                                                                         \
-    (void)(ctx);                                                               \
-    (void)(file);                                                              \
-  } while (false)
-#define COMMON_INTERCEPTOR_LIBRARY_LOADED(filename, handle)                    \
-  do {                                                                         \
-    (void)(filename);                                                          \
-    (void)(handle);                                                            \
-  } while (false)
-#define COMMON_INTERCEPTOR_LIBRARY_UNLOADED()                                  \
-  do {                                                                         \
-  } while (false)
-#define COMMON_INTERCEPTOR_ACQUIRE(ctx, u)                                     \
-  do {                                                                         \
-    (void)(ctx);                                                               \
-    (void)(u);                                                                 \
-  } while (false)
-#define COMMON_INTERCEPTOR_RELEASE(ctx, u)                                     \
-  do {                                                                         \
-    (void)(ctx);                                                               \
-    (void)(u);                                                                 \
-  } while (false)
-#define COMMON_INTERCEPTOR_DIR_ACQUIRE(ctx, path)                              \
-  do {                                                                         \
-    (void)(ctx);                                                               \
-    (void)(path);                                                              \
-  } while (false)
-#define COMMON_INTERCEPTOR_FD_ACQUIRE(ctx, fd)                                 \
-  do {                                                                         \
-    (void)(ctx);                                                               \
-    (void)(fd);                                                                \
-  } while (false)
-#define COMMON_INTERCEPTOR_FD_RELEASE(ctx, fd)                                 \
-  do {                                                                         \
-    (void)(ctx);                                                               \
-    (void)(fd);                                                                \
-  } while (false)
-#define COMMON_INTERCEPTOR_FD_ACCESS(ctx, fd)                                  \
-  do {                                                                         \
-    (void)(ctx);                                                               \
-    (void)(fd);                                                                \
-  } while (false)
-#define COMMON_INTERCEPTOR_FD_SOCKET_ACCEPT(ctx, fd, newfd)                    \
-  do {                                                                         \
-    (void)(ctx);                                                               \
-    (void)(fd);                                                                \
-    (void)(newfd);                                                             \
-  } while (false)
-#define COMMON_INTERCEPTOR_SET_THREAD_NAME(ctx, name)                          \
-  do {                                                                         \
-    (void)(ctx);                                                               \
-    (void)(name);                                                              \
-  } while (false)
-#define COMMON_INTERCEPTOR_SET_PTHREAD_NAME(ctx, thread, name)                 \
-  do {                                                                         \
-    (void)(ctx);                                                               \
-    (void)(thread);                                                            \
-    (void)(name);                                                              \
-  } while (false)
-#define COMMON_INTERCEPTOR_BLOCK_REAL(name) REAL(name)
-#define COMMON_INTERCEPTOR_MUTEX_LOCK(ctx, m)                                  \
-  do {                                                                         \
-    (void)(ctx);                                                               \
-    (void)(m);                                                                 \
-  } while (false)
-#define COMMON_INTERCEPTOR_MUTEX_UNLOCK(ctx, m)                                \
-  do {                                                                         \
-    (void)(ctx);                                                               \
-    (void)(m);                                                                 \
-  } while (false)
-#define COMMON_INTERCEPTOR_MUTEX_REPAIR(ctx, m)                                \
-  do {                                                                         \
-    (void)(ctx);                                                               \
-    (void)(m);                                                                 \
-  } while (false)
-#define COMMON_INTERCEPTOR_HANDLE_RECVMSG(ctx, msg)                            \
-  do {                                                                         \
-    (void)(ctx);                                                               \
-    (void)(msg);                                                               \
-  } while (false)
-#define COMMON_INTERCEPTOR_USER_CALLBACK_START()                               \
-  do {                                                                         \
-  } while (false)
-#define COMMON_INTERCEPTOR_USER_CALLBACK_END()                                 \
-  do {                                                                         \
-  } while (false)
-
-#define COMMON_INTERCEPTOR_MMAP_IMPL(ctx, mmap, addr, sz, prot, flags, fd,     \
-                                     off)                                      \
-  do {                                                                         \
-    if (!fixMmapAddr(&addr, sz, flags))                                        \
-      return (void *)-1;                                                       \
-    void *result = REAL(mmap)(addr, sz, prot, flags, fd, off);                 \
-    return (void *)checkMmapResult((uptr)result, sz);                          \
-  } while (false)
-
-#include "sanitizer_common/sanitizer_common_interceptors.inc"
-
-//===----------------------------------------------------------------------===//
-// Syscall interception
-//===----------------------------------------------------------------------===//
-
-// We want the caller's PC b/c unlike the other function interceptors these
-// are separate pre and post functions called around the app's syscall().
-
-#define COMMON_SYSCALL_PRE_READ_RANGE(ptr, size)                               \
-  processRangeAccess(GET_CALLER_PC(), (uptr)ptr, size, false)
-
-#define COMMON_SYSCALL_PRE_WRITE_RANGE(ptr, size)                              \
-  do {                                                                         \
-    (void)(ptr);                                                               \
-    (void)(size);                                                              \
-  } while (false)
-
-#define COMMON_SYSCALL_POST_READ_RANGE(ptr, size)                              \
-  do {                                                                         \
-    (void)(ptr);                                                               \
-    (void)(size);                                                              \
-  } while (false)
-
-// The actual amount written is in post, not pre.
-#define COMMON_SYSCALL_POST_WRITE_RANGE(ptr, size)                             \
-  processRangeAccess(GET_CALLER_PC(), (uptr)ptr, size, true)
-
-#define COMMON_SYSCALL_ACQUIRE(addr)                                           \
-  do {                                                                         \
-    (void)(addr);                                                              \
-  } while (false)
-#define COMMON_SYSCALL_RELEASE(addr)                                           \
-  do {                                                                         \
-    (void)(addr);                                                              \
-  } while (false)
-#define COMMON_SYSCALL_FD_CLOSE(fd)                                            \
-  do {                                                                         \
-    (void)(fd);                                                                \
-  } while (false)
-#define COMMON_SYSCALL_FD_ACQUIRE(fd)                                          \
-  do {                                                                         \
-    (void)(fd);                                                                \
-  } while (false)
-#define COMMON_SYSCALL_FD_RELEASE(fd)                                          \
-  do {                                                                         \
-    (void)(fd);                                                                \
-  } while (false)
-#define COMMON_SYSCALL_PRE_FORK()                                              \
-  do {                                                                         \
-  } while (false)
-#define COMMON_SYSCALL_POST_FORK(res)                                          \
-  do {                                                                         \
-    (void)(res);                                                               \
-  } while (false)
-
-#include "sanitizer_common/sanitizer_common_syscalls.inc"
-#include "sanitizer_common/sanitizer_syscalls_netbsd.inc"
-
-//===----------------------------------------------------------------------===//
-// Custom interceptors
-//===----------------------------------------------------------------------===//
-
-// TODO(bruening): move more of these to the common interception pool as they
-// are shared with tsan and asan.
-// While our other files match LLVM style, here we match sanitizer style as we
-// expect to move these to the common pool.
-
-INTERCEPTOR(char *, strcpy, char *dst, const char *src) { // NOLINT
-  void *ctx;
-  COMMON_INTERCEPTOR_ENTER(ctx, strcpy, dst, src);
-  uptr srclen = internal_strlen(src);
-  COMMON_INTERCEPTOR_WRITE_RANGE(ctx, dst, srclen + 1);
-  COMMON_INTERCEPTOR_READ_RANGE(ctx, src, srclen + 1);
-  return REAL(strcpy)(dst, src); // NOLINT
-}
-
-INTERCEPTOR(char *, strncpy, char *dst, char *src, uptr n) {
-  void *ctx;
-  COMMON_INTERCEPTOR_ENTER(ctx, strncpy, dst, src, n);
-  uptr srclen = internal_strnlen(src, n);
-  uptr copied_size = srclen + 1 > n ? n : srclen + 1;
-  COMMON_INTERCEPTOR_WRITE_RANGE(ctx, dst, copied_size);
-  COMMON_INTERCEPTOR_READ_RANGE(ctx, src, copied_size);
-  return REAL(strncpy)(dst, src, n);
-}
-
-INTERCEPTOR(int, open, const char *name, int flags, int mode) {
-  void *ctx;
-  COMMON_INTERCEPTOR_ENTER(ctx, open, name, flags, mode);
-  COMMON_INTERCEPTOR_READ_STRING(ctx, name, 0);
-  return REAL(open)(name, flags, mode);
-}
-
-#if SANITIZER_LINUX
-INTERCEPTOR(int, open64, const char *name, int flags, int mode) {
-  void *ctx;
-  COMMON_INTERCEPTOR_ENTER(ctx, open64, name, flags, mode);
-  COMMON_INTERCEPTOR_READ_STRING(ctx, name, 0);
-  return REAL(open64)(name, flags, mode);
-}
-#define ESAN_MAYBE_INTERCEPT_OPEN64 INTERCEPT_FUNCTION(open64)
-#else
-#define ESAN_MAYBE_INTERCEPT_OPEN64
-#endif
-
-INTERCEPTOR(int, creat, const char *name, int mode) {
-  void *ctx;
-  COMMON_INTERCEPTOR_ENTER(ctx, creat, name, mode);
-  COMMON_INTERCEPTOR_READ_STRING(ctx, name, 0);
-  return REAL(creat)(name, mode);
-}
-
-#if SANITIZER_LINUX
-INTERCEPTOR(int, creat64, const char *name, int mode) {
-  void *ctx;
-  COMMON_INTERCEPTOR_ENTER(ctx, creat64, name, mode);
-  COMMON_INTERCEPTOR_READ_STRING(ctx, name, 0);
-  return REAL(creat64)(name, mode);
-}
-#define ESAN_MAYBE_INTERCEPT_CREAT64 INTERCEPT_FUNCTION(creat64)
-#else
-#define ESAN_MAYBE_INTERCEPT_CREAT64
-#endif
-
-INTERCEPTOR(int, unlink, char *path) {
-  void *ctx;
-  COMMON_INTERCEPTOR_ENTER(ctx, unlink, path);
-  COMMON_INTERCEPTOR_READ_STRING(ctx, path, 0);
-  return REAL(unlink)(path);
-}
-
-INTERCEPTOR(int, rmdir, char *path) {
-  void *ctx;
-  COMMON_INTERCEPTOR_ENTER(ctx, rmdir, path);
-  COMMON_INTERCEPTOR_READ_STRING(ctx, path, 0);
-  return REAL(rmdir)(path);
-}
-
-//===----------------------------------------------------------------------===//
-// Signal-related interceptors
-//===----------------------------------------------------------------------===//
-
-#if SANITIZER_LINUX || SANITIZER_FREEBSD
-typedef void (*signal_handler_t)(int);
-INTERCEPTOR(signal_handler_t, signal, int signum, signal_handler_t handler) {
-  void *ctx;
-  COMMON_INTERCEPTOR_ENTER(ctx, signal, signum, handler);
-  signal_handler_t result;
-  if (!processSignal(signum, handler, &result))
-    return result;
-  else
-    return REAL(signal)(signum, handler);
-}
-#define ESAN_MAYBE_INTERCEPT_SIGNAL INTERCEPT_FUNCTION(signal)
-#else
-#error Platform not supported
-#define ESAN_MAYBE_INTERCEPT_SIGNAL
-#endif
-
-#if SANITIZER_LINUX || SANITIZER_FREEBSD
-DECLARE_REAL(int, sigaction, int signum, const struct sigaction *act,
-             struct sigaction *oldact)
-INTERCEPTOR(int, sigaction, int signum, const struct sigaction *act,
-            struct sigaction *oldact) {
-  void *ctx;
-  COMMON_INTERCEPTOR_ENTER(ctx, sigaction, signum, act, oldact);
-  if (!processSigaction(signum, act, oldact))
-    return 0;
-  else
-    return REAL(sigaction)(signum, act, oldact);
-}
-
-// This is required to properly use internal_sigaction.
-namespace __sanitizer {
-int real_sigaction(int signum, const void *act, void *oldact) {
-  if (REAL(sigaction) == nullptr) {
-    // With an instrumented allocator, this is called during interceptor init
-    // and we need a raw syscall solution.
-#if SANITIZER_LINUX
-    return internal_sigaction_syscall(signum, act, oldact);
-#else
-    return internal_sigaction(signum, act, oldact);
-#endif
-  }
-  return REAL(sigaction)(signum, (const struct sigaction *)act,
-                         (struct sigaction *)oldact);
-}
-} // namespace __sanitizer
-
-#define ESAN_MAYBE_INTERCEPT_SIGACTION INTERCEPT_FUNCTION(sigaction)
-#else
-#error Platform not supported
-#define ESAN_MAYBE_INTERCEPT_SIGACTION
-#endif
-
-#if SANITIZER_LINUX || SANITIZER_FREEBSD
-INTERCEPTOR(int, sigprocmask, int how, __sanitizer_sigset_t *set,
-            __sanitizer_sigset_t *oldset) {
-  void *ctx;
-  COMMON_INTERCEPTOR_ENTER(ctx, sigprocmask, how, set, oldset);
-  int res = 0;
-  if (processSigprocmask(how, set, oldset))
-    res = REAL(sigprocmask)(how, set, oldset);
-  if (!res && oldset)
-    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, oldset, sizeof(*oldset));
-  return res;
-}
-#define ESAN_MAYBE_INTERCEPT_SIGPROCMASK INTERCEPT_FUNCTION(sigprocmask)
-#else
-#define ESAN_MAYBE_INTERCEPT_SIGPROCMASK
-#endif
-
-#if !SANITIZER_WINDOWS
-INTERCEPTOR(int, pthread_sigmask, int how, __sanitizer_sigset_t *set,
-            __sanitizer_sigset_t *oldset) {
-  void *ctx;
-  COMMON_INTERCEPTOR_ENTER(ctx, pthread_sigmask, how, set, oldset);
-  int res = 0;
-  if (processSigprocmask(how, set, oldset))
-    res = REAL(sigprocmask)(how, set, oldset);
-  if (!res && oldset)
-    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, oldset, sizeof(*oldset));
-  return res;
-}
-#define ESAN_MAYBE_INTERCEPT_PTHREAD_SIGMASK INTERCEPT_FUNCTION(pthread_sigmask)
-#else
-#define ESAN_MAYBE_INTERCEPT_PTHREAD_SIGMASK
-#endif
-
-//===----------------------------------------------------------------------===//
-// Malloc interceptors
-//===----------------------------------------------------------------------===//
-
-static const uptr early_alloc_buf_size = 4096;
-static uptr allocated_bytes;
-static char early_alloc_buf[early_alloc_buf_size];
-
-static bool isInEarlyAllocBuf(const void *ptr) {
-  return ((uptr)ptr >= (uptr)early_alloc_buf &&
-          ((uptr)ptr - (uptr)early_alloc_buf) < sizeof(early_alloc_buf));
-}
-
-static void *handleEarlyAlloc(uptr size) {
-  // If esan is initialized during an interceptor (which happens with some
-  // tcmalloc implementations that call pthread_mutex_lock), the call from
-  // dlsym to calloc will deadlock.
-  // dlsym may also call malloc before REAL(malloc) is retrieved from dlsym.
-  // We work around it by using a static buffer for the early malloc/calloc
-  // requests.
-  // This solution will also allow us to deliberately intercept malloc & family
-  // in the future (to perform tool actions on each allocation, without
-  // replacing the allocator), as it also solves the problem of intercepting
-  // calloc when it will itself be called before its REAL pointer is
-  // initialized.
-  // We do not handle multiple threads here.  This only happens at process init
-  // time, and while it's possible for a shared library to create early threads
-  // that race here, we consider that to be a corner case extreme enough that
-  // it's not worth the effort to handle.
-  void *mem = (void *)&early_alloc_buf[allocated_bytes];
-  allocated_bytes += size;
-  CHECK_LT(allocated_bytes, early_alloc_buf_size);
-  return mem;
-}
-
-INTERCEPTOR(void*, calloc, uptr size, uptr n) {
-  if (EsanDuringInit && REAL(calloc) == nullptr)
-    return handleEarlyAlloc(size * n);
-  void *ctx;
-  COMMON_INTERCEPTOR_ENTER(ctx, calloc, size, n);
-  void *res = REAL(calloc)(size, n);
-  // The memory is zeroed and thus is all written.
-  COMMON_INTERCEPTOR_WRITE_RANGE(nullptr, (uptr)res, size * n);
-  return res;
-}
-
-INTERCEPTOR(void*, malloc, uptr size) {
-  if (EsanDuringInit && REAL(malloc) == nullptr)
-    return handleEarlyAlloc(size);
-  void *ctx;
-  COMMON_INTERCEPTOR_ENTER(ctx, malloc, size);
-  return REAL(malloc)(size);
-}
-
-INTERCEPTOR(void, free, void *p) {
-  void *ctx;
-  // There are only a few early allocation requests, so we simply skip the free.
-  if (isInEarlyAllocBuf(p))
-    return;
-  COMMON_INTERCEPTOR_ENTER(ctx, free, p);
-  REAL(free)(p);
-}
-
-namespace __esan {
-
-void initializeInterceptors() {
-  InitializeCommonInterceptors();
-
-  INTERCEPT_FUNCTION(strcpy); // NOLINT
-  INTERCEPT_FUNCTION(strncpy);
-
-  INTERCEPT_FUNCTION(open);
-  ESAN_MAYBE_INTERCEPT_OPEN64;
-  INTERCEPT_FUNCTION(creat);
-  ESAN_MAYBE_INTERCEPT_CREAT64;
-  INTERCEPT_FUNCTION(unlink);
-  INTERCEPT_FUNCTION(rmdir);
-
-  ESAN_MAYBE_INTERCEPT_SIGNAL;
-  ESAN_MAYBE_INTERCEPT_SIGACTION;
-  ESAN_MAYBE_INTERCEPT_SIGPROCMASK;
-  ESAN_MAYBE_INTERCEPT_PTHREAD_SIGMASK;
-
-  INTERCEPT_FUNCTION(calloc);
-  INTERCEPT_FUNCTION(malloc);
-  INTERCEPT_FUNCTION(free);
-
-  // TODO(bruening): intercept routines that other sanitizers intercept that
-  // are not in the common pool or here yet, ideally by adding to the common
-  // pool.  Examples include wcslen and bcopy.
-
-  // TODO(bruening): there are many more libc routines that read or write data
-  // structures that no sanitizer is intercepting: sigaction, strtol, etc.
-}
-
-} // namespace __esan

compiler-rt/lib/esan/esan_interface.cpp

-//===-- esan_interface.cpp ------------------------------------------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-//
-// This file is a part of EfficiencySanitizer, a family of performance tuners.
-//
-//===----------------------------------------------------------------------===//
-
-#include "esan_interface_internal.h"
-#include "esan.h"
-#include "sanitizer_common/sanitizer_internal_defs.h"
-
-using namespace __esan; // NOLINT
-
-void __esan_init(ToolType Tool, void *Ptr) {
-  if (Tool != __esan_which_tool) {
-    Printf("ERROR: tool mismatch: %d vs %d\n", Tool, __esan_which_tool);
-    Die();
-  }
-  initializeLibrary(Tool);
-  processCompilationUnitInit(Ptr);
-}
-
-void __esan_exit(void *Ptr) {
-  processCompilationUnitExit(Ptr);
-}
-
-void __esan_aligned_load1(void *Addr) {
-  processRangeAccess(GET_CALLER_PC(), (uptr)Addr, 1, false);
-}
-
-void __esan_aligned_load2(void *Addr) {
-  processRangeAccess(GET_CALLER_PC(), (uptr)Addr, 2, false);
-}
-
-void __esan_aligned_load4(void *Addr) {
-  processRangeAccess(GET_CALLER_PC(), (uptr)Addr, 4, false);
-}
-
-void __esan_aligned_load8(void *Addr) {
-  processRangeAccess(GET_CALLER_PC(), (uptr)Addr, 8, false);
-}
-
-void __esan_aligned_load16(void *Addr) {
-  processRangeAccess(GET_CALLER_PC(), (uptr)Addr, 16, false);
-}
-
-void __esan_aligned_store1(void *Addr) {
-  processRangeAccess(GET_CALLER_PC(), (uptr)Addr, 1, true);
-}
-
-void __esan_aligned_store2(void *Addr) {
-  processRangeAccess(GET_CALLER_PC(), (uptr)Addr, 2, true);
-}
-
-void __esan_aligned_store4(void *Addr) {
-  processRangeAccess(GET_CALLER_PC(), (uptr)Addr, 4, true);
-}
-
-void __esan_aligned_store8(void *Addr) {
-  processRangeAccess(GET_CALLER_PC(), (uptr)Addr, 8, true);
-}
-
-void __esan_aligned_store16(void *Addr) {
-  processRangeAccess(GET_CALLER_PC(), (uptr)Addr, 16, true);
-}
-
-void __esan_unaligned_load2(void *Addr) {
-  processRangeAccess(GET_CALLER_PC(), (uptr)Addr, 2, false);
-}
-
-void __esan_unaligned_load4(void *Addr) {
-  processRangeAccess(GET_CALLER_PC(), (uptr)Addr, 4, false);
-}
-
-void __esan_unaligned_load8(void *Addr) {
-  processRangeAccess(GET_CALLER_PC(), (uptr)Addr, 8, false);
-}
-
-void __esan_unaligned_load16(void *Addr) {
-  processRangeAccess(GET_CALLER_PC(), (uptr)Addr, 16, false);
-}
-
-void __esan_unaligned_store2(void *Addr) {
-  processRangeAccess(GET_CALLER_PC(), (uptr)Addr, 2, true);
-}
-
-void __esan_unaligned_store4(void *Addr) {
-  processRangeAccess(GET_CALLER_PC(), (uptr)Addr, 4, true);
-}
-
-void __esan_unaligned_store8(void *Addr) {
-  processRangeAccess(GET_CALLER_PC(), (uptr)Addr, 8, true);
-}
-
-void __esan_unaligned_store16(void *Addr) {
-  processRangeAccess(GET_CALLER_PC(), (uptr)Addr, 16, true);
-}
-
-void __esan_unaligned_loadN(void *Addr, uptr Size) {
-  processRangeAccess(GET_CALLER_PC(), (uptr)Addr, Size, false);
-}
-
-void __esan_unaligned_storeN(void *Addr, uptr Size) {
-  processRangeAccess(GET_CALLER_PC(), (uptr)Addr, Size, true);
-}
-
-// Public interface:
-extern "C" {
-SANITIZER_INTERFACE_ATTRIBUTE void __esan_report() {
-  reportResults();
-}
-
-SANITIZER_INTERFACE_ATTRIBUTE unsigned int __esan_get_sample_count() {
-  return getSampleCount();
-}
-} // extern "C"

compiler-rt/lib/esan/esan_interface_internal.h

-//===-- esan_interface_internal.h -------------------------------*- C++ -*-===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-//
-// This file is a part of EfficiencySanitizer, a family of performance tuners.
-//
-// Calls to the functions declared in this header will be inserted by
-// the instrumentation module.
-//===----------------------------------------------------------------------===//
-
-#ifndef ESAN_INTERFACE_INTERNAL_H
-#define ESAN_INTERFACE_INTERNAL_H
-
-#include <sanitizer_common/sanitizer_internal_defs.h>
-
-// This header should NOT include any other headers.
-// All functions in this header are extern "C" and start with __esan_.
-
-using __sanitizer::uptr;
-using __sanitizer::u32;
-
-extern "C" {
-
-// This should be kept consistent with LLVM's EfficiencySanitizerOptions.
-// The value is passed as a 32-bit integer by the compiler.
-typedef enum Type : u32 {
-  ESAN_None = 0,
-  ESAN_CacheFrag,
-  ESAN_WorkingSet,
-  ESAN_Max,
-} ToolType;
-
-// To handle interceptors that invoke instrumented code prior to
-// __esan_init() being called, the instrumentation module creates this
-// global variable specifying the tool.
-extern ToolType __esan_which_tool;
-
-// This function should be called at the very beginning of the process,
-// before any instrumented code is executed and before any call to malloc.
-SANITIZER_INTERFACE_ATTRIBUTE void __esan_init(ToolType Tool, void *Ptr);
-SANITIZER_INTERFACE_ATTRIBUTE void __esan_exit(void *Ptr);
-
-// The instrumentation module will insert a call to one of these routines prior
-// to each load and store instruction for which we do not have "fastpath"
-// inlined instrumentation.  These calls constitute the "slowpath" for our
-// tools.  We have separate routines for each type of memory access to enable
-// targeted optimization.
-SANITIZER_INTERFACE_ATTRIBUTE void __esan_aligned_load1(void *Addr);
-SANITIZER_INTERFACE_ATTRIBUTE void __esan_aligned_load2(void *Addr);
-SANITIZER_INTERFACE_ATTRIBUTE void __esan_aligned_load4(void *Addr);
-SANITIZER_INTERFACE_ATTRIBUTE void __esan_aligned_load8(void *Addr);
-SANITIZER_INTERFACE_ATTRIBUTE void __esan_aligned_load16(void *Addr);
-
-SANITIZER_INTERFACE_ATTRIBUTE void __esan_aligned_store1(void *Addr);
-SANITIZER_INTERFACE_ATTRIBUTE void __esan_aligned_store2(void *Addr);
-SANITIZER_INTERFACE_ATTRIBUTE void __esan_aligned_store4(void *Addr);
-SANITIZER_INTERFACE_ATTRIBUTE void __esan_aligned_store8(void *Addr);
-SANITIZER_INTERFACE_ATTRIBUTE void __esan_aligned_store16(void *Addr);
-
-SANITIZER_INTERFACE_ATTRIBUTE void __esan_unaligned_load2(void *Addr);
-SANITIZER_INTERFACE_ATTRIBUTE void __esan_unaligned_load4(void *Addr);
-SANITIZER_INTERFACE_ATTRIBUTE void __esan_unaligned_load8(void *Addr);
-SANITIZER_INTERFACE_ATTRIBUTE void __esan_unaligned_load16(void *Addr);
-
-SANITIZER_INTERFACE_ATTRIBUTE void __esan_unaligned_store2(void *Addr);
-SANITIZER_INTERFACE_ATTRIBUTE void __esan_unaligned_store4(void *Addr);
-SANITIZER_INTERFACE_ATTRIBUTE void __esan_unaligned_store8(void *Addr);
-SANITIZER_INTERFACE_ATTRIBUTE void __esan_unaligned_store16(void *Addr);
-
-// These cover unusually-sized accesses.
-SANITIZER_INTERFACE_ATTRIBUTE
-void __esan_unaligned_loadN(void *Addr, uptr Size);
-SANITIZER_INTERFACE_ATTRIBUTE
-void __esan_unaligned_storeN(void *Addr, uptr Size);
-
-} // extern "C"
-
-#endif // ESAN_INTERFACE_INTERNAL_H

compiler-rt/lib/esan/esan_linux.cpp

-//===-- esan.cpp ----------------------------------------------------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-//
-// This file is a part of EfficiencySanitizer, a family of performance tuners.
-//
-// Linux-specific code for the Esan run-time.
-//===----------------------------------------------------------------------===//
-
-#include "sanitizer_common/sanitizer_platform.h"
-#if SANITIZER_FREEBSD || SANITIZER_LINUX
-
-#include "esan.h"
-#include "esan_shadow.h"
-#include "interception/interception.h"
-#include "sanitizer_common/sanitizer_common.h"
-#include <sys/mman.h>
-#include <errno.h>
-
-namespace __esan {
-
-void verifyAddressSpace() {
-#if SANITIZER_LINUX && (defined(__x86_64__) || SANITIZER_MIPS64)
-  // The kernel determines its mmap base from the stack size limit.
-  // Our Linux 64-bit shadow mapping assumes the stack limit is less than a
-  // terabyte, which keeps the mmap region above 0x7e00'.
-  uptr StackLimit = GetStackSizeLimitInBytes();
-  if (StackSizeIsUnlimited() || StackLimit > MaxStackSize) {
-    VReport(1, "The stack size limit is beyond the maximum supported.\n"
-            "Re-execing with a stack size below 1TB.\n");
-    SetStackSizeLimitInBytes(MaxStackSize);
-    ReExec();
-  }
-#endif
-}
-
-static bool liesWithinSingleAppRegion(uptr Start, SIZE_T Size) {
-  uptr AppStart, AppEnd;
-  for (int i = 0; getAppRegion(i, &AppStart, &AppEnd); ++i) {
-    if (Start >= AppStart && Start + Size - 1 <= AppEnd) {
-      return true;
-    }
-  }
-  return false;
-}
-
-bool fixMmapAddr(void **Addr, SIZE_T Size, int Flags) {
-  if (*Addr) {
-    if (!liesWithinSingleAppRegion((uptr)*Addr, Size)) {
-      VPrintf(1, "mmap conflict: [%p-%p) is not in an app region\n",
-              *Addr, (uptr)*Addr + Size);
-      if (Flags & MAP_FIXED) {
-        errno = EINVAL;
-        return false;
-      } else {
-        *Addr = 0;
-      }
-    }
-  }
-  return true;
-}
-
-uptr checkMmapResult(uptr Addr, SIZE_T Size) {
-  if ((void *)Addr == MAP_FAILED)
-    return Addr;
-  if (!liesWithinSingleAppRegion(Addr, Size)) {
-    // FIXME: attempt to dynamically add this as an app region if it
-    // fits our shadow criteria.
-    // We could also try to remap somewhere else.
-    Printf("ERROR: unsupported mapping at [%p-%p)\n", Addr, Addr+Size);
-    Die();
-  }
-  return Addr;
-}
-
-} // namespace __esan
-
-#endif // SANITIZER_FREEBSD || SANITIZER_LINUX

compiler-rt/lib/esan/esan_shadow.h

-//===-- esan_shadow.h -------------------------------------------*- C++ -*-===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-//
-// This file is a part of EfficiencySanitizer, a family of performance tuners.
-//
-// Shadow memory mappings for the esan run-time.
-//===----------------------------------------------------------------------===//
-
-#ifndef ESAN_SHADOW_H
-#define ESAN_SHADOW_H
-
-#include "esan.h"
-#include <sanitizer_common/sanitizer_platform.h>
-
-#if SANITIZER_WORDSIZE != 64
-#error Only 64-bit is supported
-#endif
-
-namespace __esan {
-
-struct ApplicationRegion {
-  uptr Start;
-  uptr End;
-  bool ShadowMergedWithPrev;
-};
-
-#if (SANITIZER_LINUX || SANITIZER_FREEBSD) && defined(__x86_64__)
-// Linux x86_64
-//
-// Application memory falls into these 5 regions (ignoring the corner case
-// of PIE with a non-zero PT_LOAD base):
-//
-// [0x00000000'00000000, 0x00000100'00000000) non-PIE + heap
-// [0x00005500'00000000, 0x00005700'00000000) PIE
-// [0x00007e00'00000000, 0x00007fff'ff600000) libraries + stack, part 1
-// [0x00007fff'ff601000, 0x00008000'00000000) libraries + stack, part 2
-// [0xffffffff'ff600000, 0xffffffff'ff601000) vsyscall
-//
-// Although we can ignore the vsyscall for the most part as there are few data
-// references there (other sanitizers ignore it), we enforce a gap inside the
-// library region to distinguish the vsyscall's shadow, considering this gap to
-// be an invalid app region.
-// We disallow application memory outside of those 5 regions.
-// Our regions assume that the stack rlimit is less than a terabyte (otherwise
-// the Linux kernel's default mmap region drops below 0x7e00'), which we enforce
-// at init time (we can support larger and unlimited sizes for shadow
-// scaledowns, but it is difficult for 1:1 mappings).
-//
-// Our shadow memory is scaled from a 1:1 mapping and supports a scale
-// specified at library initialization time that can be any power-of-2
-// scaledown (1x, 2x, 4x, 8x, 16x, etc.).
-//
-// We model our shadow memory after Umbra, a library used by the Dr. Memory
-// tool: https://github.com/DynamoRIO/drmemory/blob/master/umbra/umbra_x64.c.
-// We use Umbra's scheme as it was designed to support different
-// offsets, it supports two different shadow mappings (which we may want to
-// use for future tools), and it ensures that the shadow of a shadow will
-// not overlap either shadow memory or application memory.
-//
-// This formula translates from application memory to shadow memory:
-//
-//   shadow(app) = ((app & 0x00000fff'ffffffff) + offset) >> scale
-//
-// Where the offset for 1:1 is 0x00001300'00000000.  For other scales, the
-// offset is shifted left by the scale, except for scales of 1 and 2 where
-// it must be tweaked in order to pass the double-shadow test
-// (see the "shadow(shadow)" comments below):
-//   scale == 0: 0x00001300'000000000
-//   scale == 1: 0x00002200'000000000
-//   scale == 2: 0x00004400'000000000
-//   scale >= 3: (0x00001300'000000000 << scale)
-//
-// Do not pass in the open-ended end value to the formula as it will fail.
-//
-// The resulting shadow memory regions for a 0 scaling are:
-//
-// [0x00001300'00000000, 0x00001400'00000000)
-// [0x00001800'00000000, 0x00001a00'00000000)
-// [0x00002100'00000000, 0x000022ff'ff600000)
-// [0x000022ff'ff601000, 0x00002300'00000000)
-// [0x000022ff'ff600000, 0x000022ff'ff601000]
-//
-// We also want to ensure that a wild access by the application into the shadow
-// regions will not corrupt our own shadow memory.  shadow(shadow) ends up
-// disjoint from shadow(app):
-//
-// [0x00001600'00000000, 0x00001700'00000000)
-// [0x00001b00'00000000, 0x00001d00'00000000)
-// [0x00001400'00000000, 0x000015ff'ff600000]
-// [0x000015ff'ff601000, 0x00001600'00000000]
-// [0x000015ff'ff600000, 0x000015ff'ff601000]
-
-static const struct ApplicationRegion AppRegions[] = {
-  {0x0000000000000000ull, 0x0000010000000000u, false},
-  {0x0000550000000000u,   0x0000570000000000u, false},
-  // We make one shadow mapping to hold the shadow regions for all 3 of these
-  // app regions, as the mappings interleave, and the gap between the 3rd and
-  // 4th scales down below a page.
-  {0x00007e0000000000u,   0x00007fffff600000u, false},
-  {0x00007fffff601000u,   0x0000800000000000u, true},
-  {0xffffffffff600000u,   0xffffffffff601000u, true},
-};
-
-#elif SANITIZER_LINUX && SANITIZER_MIPS64
-
-// Application memory falls into these 3 regions
-//
-// [0x00000001'00000000, 0x00000002'00000000) non-PIE + heap
-// [0x000000aa'00000000, 0x000000ab'00000000) PIE
-// [0x000000ff'00000000, 0x000000ff'ffffffff) libraries + stack
-//
-// This formula translates from application memory to shadow memory:
-//
-//   shadow(app) = ((app & 0x00000f'ffffffff) + offset) >> scale
-//
-// Where the offset for 1:1 is 0x000013'00000000.  For other scales, the
-// offset is shifted left by the scale, except for scales of 1 and 2 where
-// it must be tweaked in order to pass the double-shadow test
-// (see the "shadow(shadow)" comments below):
-//   scale == 0: 0x000013'00000000
-//   scale == 1: 0x000022'00000000
-//   scale == 2: 0x000044'00000000
-//   scale >= 3: (0x000013'00000000 << scale)
-//
-// The resulting shadow memory regions for a 0 scaling are:
-//
-// [0x00000014'00000000, 0x00000015'00000000)
-// [0x0000001d'00000000, 0x0000001e'00000000)
-// [0x00000022'00000000, 0x00000022'ffffffff)
-//
-// We also want to ensure that a wild access by the application into the shadow
-// regions will not corrupt our own shadow memory. shadow(shadow) ends up
-// disjoint from shadow(app):
-//
-// [0x00000017'00000000, 0x00000018'00000000)
-// [0x00000020'00000000, 0x00000021'00000000)
-// [0x00000015'00000000, 0x00000015'ffffffff]
-
-static const struct ApplicationRegion AppRegions[] = {
-  {0x0100000000u, 0x0200000000u, false},
-  {0xaa00000000u, 0xab00000000u, false},
-  {0xff00000000u, 0xffffffffffu, false},
-};
-
-#else
-#error Platform not supported
-#endif
-
-static const u32 NumAppRegions = sizeof(AppRegions)/sizeof(AppRegions[0]);
-
-// See the comment above: we do not currently support a stack size rlimit
-// equal to or larger than 1TB.
-static const uptr MaxStackSize = (1ULL << 40) - 4096;
-
-class ShadowMapping {
-public:
-
-  // The scale and offset vary by tool.
-  uptr Scale;
-  uptr Offset;
-
-  // TODO(sagar.thakur): Try to hardcode the mask as done in the compiler
-  // instrumentation to reduce the runtime cost of appToShadow.
-  struct ShadowMemoryMask40 {
-    static const uptr Mask = 0x0000000fffffffffu;
-  };
-
-  struct ShadowMemoryMask47 {
-    static const uptr Mask = 0x00000fffffffffffu;
-  };
-
-  void initialize(uptr ShadowScale) {
-
-    const uptr OffsetArray40[3] = {
-      0x0000001300000000u,
-      0x0000002200000000u,
-      0x0000004400000000u,
-    };
-
-    const uptr OffsetArray47[3] = {
-      0x0000130000000000u,
-      0x0000220000000000u,
-      0x0000440000000000u,
-    };
-
-    Scale = ShadowScale;
-    switch (VmaSize) {
-      case 40: {
-        if (Scale <= 2)
-          Offset = OffsetArray40[Scale];
-        else
-          Offset = OffsetArray40[0] << Scale;
-      }
-      break;
-      case 47: {
-        if (Scale <= 2)
-          Offset = OffsetArray47[Scale];
-        else
-          Offset = OffsetArray47[0] << Scale;
-      }
-      break;
-      default: {
-        Printf("ERROR: %d-bit virtual memory address size not supported\n", VmaSize);
-        Die();
-      }
-    }
-  }
-};
-extern ShadowMapping Mapping;
-
-static inline bool getAppRegion(u32 i, uptr *Start, uptr *End) {
-  if (i >= NumAppRegions)
-    return false;
-  *Start = AppRegions[i].Start;
-  *End = AppRegions[i].End;
-  return true;
-}
-
-ALWAYS_INLINE
-bool isAppMem(uptr Mem) {
-  for (u32 i = 0; i < NumAppRegions; ++i) {
-    if (Mem >= AppRegions[i].Start && Mem < AppRegions[i].End)
-      return true;
-  }
-  return false;
-}
-
-template<typename Params>
-uptr appToShadowImpl(uptr App) {
-  return (((App & Params::Mask) + Mapping.Offset) >> Mapping.Scale);
-}
-
-ALWAYS_INLINE
-uptr appToShadow(uptr App) {
-  switch (VmaSize) {
-    case 40: return appToShadowImpl<ShadowMapping::ShadowMemoryMask40>(App);
-    case 47: return appToShadowImpl<ShadowMapping::ShadowMemoryMask47>(App);
-    default: {
-      Printf("ERROR: %d-bit virtual memory address size not supported\n", VmaSize);
-      Die();
-    }
-  }
-}
-
-static inline bool getShadowRegion(u32 i, uptr *Start, uptr *End) {
-  if (i >= NumAppRegions)
-    return false;
-  u32 UnmergedShadowCount = 0;
-  u32 AppIdx;
-  for (AppIdx = 0; AppIdx < NumAppRegions; ++AppIdx) {
-    if (!AppRegions[AppIdx].ShadowMergedWithPrev) {
-      if (UnmergedShadowCount == i)
-        break;
-      UnmergedShadowCount++;
-    }
-  }
-  if (AppIdx >= NumAppRegions || UnmergedShadowCount != i)
-    return false;
-  *Start = appToShadow(AppRegions[AppIdx].Start);
-  // The formula fails for the end itself.
-  *End = appToShadow(AppRegions[AppIdx].End - 1) + 1;
-  // Merge with adjacent shadow regions:
-  for (++AppIdx; AppIdx < NumAppRegions; ++AppIdx) {
-    if (!AppRegions[AppIdx].ShadowMergedWithPrev)
-      break;
-    *Start = Min(*Start, appToShadow(AppRegions[AppIdx].Start));
-    *End = Max(*End, appToShadow(AppRegions[AppIdx].End - 1) + 1);
-  }
-  return true;
-}
-
-ALWAYS_INLINE
-bool isShadowMem(uptr Mem) {
-  // We assume this is not used on any critical performance path and so there's
-  // no need to hardcode the mapping results.
-  for (uptr i = 0; i < NumAppRegions; ++i) {
-    if (Mem >= appToShadow(AppRegions[i].Start) &&
-        Mem < appToShadow(AppRegions[i].End - 1) + 1)
-      return true;
-  }
-  return false;
-}
-
-} // namespace __esan
-
-#endif /* ESAN_SHADOW_H */

compiler-rt/lib/esan/esan_sideline.h

-//===-- esan_sideline.h -----------------------------------------*- C++ -*-===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-//
-// This file is a part of EfficiencySanitizer, a family of performance tuners.
-//
-// Esan sideline thread support.
-//===----------------------------------------------------------------------===//
-
-#ifndef ESAN_SIDELINE_H
-#define ESAN_SIDELINE_H
-
-#include "sanitizer_common/sanitizer_atomic.h"
-#include "sanitizer_common/sanitizer_internal_defs.h"
-#include "sanitizer_common/sanitizer_platform_limits_freebsd.h"
-#include "sanitizer_common/sanitizer_platform_limits_posix.h"
-
-namespace __esan {
-
-typedef void (*SidelineFunc)(void *Arg);
-
-// Currently only one sideline thread is supported.
-// It calls the SidelineFunc passed to launchThread once on each sample at the
-// given frequency in real time (i.e., wall clock time).
-class SidelineThread {
-public:
-  // We cannot initialize any fields in the constructor as it will be called
-  // *after* launchThread for a static instance, as esan.module_ctor is called
-  // before static initializers.
-  SidelineThread() {}
-  ~SidelineThread() {}
-
-  // To simplify declaration in sanitizer code where we want to avoid
-  // heap allocations, the constructor and destructor do nothing and
-  // launchThread and joinThread do the real work.
-  // They should each be called just once.
-  bool launchThread(SidelineFunc takeSample, void *Arg, u32 FreqMilliSec);
-  bool joinThread();
-
-  // Must be called from the sideline thread itself.
-  bool adjustTimer(u32 FreqMilliSec);
-
-private:
-  static int runSideline(void *Arg);
-  static void registerSignal(int SigNum);
-  static void handleSidelineSignal(int SigNum, __sanitizer_siginfo *SigInfo,
-                                   void *Ctx);
-
-  char *Stack;
-  SidelineFunc sampleFunc;
-  void *FuncArg;
-  u32 Freq;
-  uptr SidelineId;
-  atomic_uintptr_t SidelineExit;
-};
-
-} // namespace __esan
-
-#endif  // ESAN_SIDELINE_H

compiler-rt/lib/esan/esan_sideline_bsd.cpp

-//===-- esan_sideline_bsd.cpp -----------------------------------*- C++ -*-===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-//
-// This file is a part of EfficiencySanitizer, a family of performance tuners.
-//
-// Support for a separate or "sideline" tool thread on FreeBSD.
-//===----------------------------------------------------------------------===//
-
-#include "sanitizer_common/sanitizer_platform.h"
-#if SANITIZER_FREEBSD
-
-#include "esan_sideline.h"
-
-namespace __esan {
-
-static SidelineThread *TheThread;
-
-bool SidelineThread::launchThread(SidelineFunc takeSample, void *Arg,
-                                  u32 FreqMilliSec) {
-  return true;
-}
-
-bool SidelineThread::joinThread() {
-  return true;
-}
-
-} // namespace __esan
-
-#endif // SANITIZER_FREEBSD

compiler-rt/lib/esan/esan_sideline_linux.cpp

-//===-- esan_sideline_linux.cpp ---------------------------------*- C++ -*-===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-//
-// This file is a part of EfficiencySanitizer, a family of performance tuners.
-//
-// Support for a separate or "sideline" tool thread on Linux.
-//===----------------------------------------------------------------------===//
-
-#include "sanitizer_common/sanitizer_platform.h"
-#if SANITIZER_LINUX
-
-#include "esan_sideline.h"
-#include "sanitizer_common/sanitizer_atomic.h"
-#include "sanitizer_common/sanitizer_common.h"
-#include "sanitizer_common/sanitizer_linux.h"
-#include <errno.h>
-#include <sched.h>
-#include <sys/prctl.h>
-#include <sys/signal.h>
-#include <sys/time.h>
-#include <sys/types.h>
-#include <sys/wait.h>
-
-namespace __esan {
-
-static const int SigAltStackSize = 4*1024;
-static const int SidelineStackSize = 4*1024;
-static const uptr SidelineIdUninitialized = 1;
-
-// FIXME: we'll need some kind of TLS (can we trust that a pthread key will
-// work in our non-POSIX thread?) to access our data in our signal handler
-// with multiple sideline threads.  For now we assume there is only one
-// sideline thread and we use a dirty solution of a global var.
-static SidelineThread *TheThread;
-
-// We aren't passing SA_NODEFER so the same signal is blocked while here.
-void SidelineThread::handleSidelineSignal(int SigNum,
-                                          __sanitizer_siginfo *SigInfo,
-                                          void *Ctx) {
-  VPrintf(3, "Sideline signal %d\n", SigNum);
-  CHECK_EQ(SigNum, SIGALRM);
-  // See above about needing TLS to avoid this global var.
-  SidelineThread *Thread = TheThread;
-  if (atomic_load(&Thread->SidelineExit, memory_order_relaxed) != 0)
-    return;
-  Thread->sampleFunc(Thread->FuncArg);
-}
-
-void SidelineThread::registerSignal(int SigNum) {
-  __sanitizer_sigaction SigAct;
-  internal_memset(&SigAct, 0, sizeof(SigAct));
-  SigAct.sigaction = handleSidelineSignal;
-  // We do not pass SA_NODEFER as we want to block the same signal.
-  SigAct.sa_flags = SA_ONSTACK | SA_SIGINFO;
-  int Res = internal_sigaction(SigNum, &SigAct, nullptr);
-  CHECK_EQ(Res, 0);
-}
-
-int SidelineThread::runSideline(void *Arg) {
-  VPrintf(1, "Sideline thread starting\n");
-  SidelineThread *Thread = static_cast<SidelineThread*>(Arg);
-
-  // If the parent dies, we want to exit also.
-  internal_prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
-
-  // Set up a signal handler on an alternate stack for safety.
-  InternalMmapVector<char> StackMap(SigAltStackSize);
-  stack_t SigAltStack;
-  SigAltStack.ss_sp = StackMap.data();
-  SigAltStack.ss_size = SigAltStackSize;
-  SigAltStack.ss_flags = 0;
-  internal_sigaltstack(&SigAltStack, nullptr);
-
-  // We inherit the signal mask from the app thread.  In case
-  // we weren't created at init time, we ensure the mask is empty.
-  __sanitizer_sigset_t SigSet;
-  internal_sigfillset(&SigSet);
-  int Res = internal_sigprocmask(SIG_UNBLOCK, &SigSet, nullptr);
-  CHECK_EQ(Res, 0);
-
-  registerSignal(SIGALRM);
-
-  bool TimerSuccess = Thread->adjustTimer(Thread->Freq);
-  CHECK(TimerSuccess);
-
-  // We loop, doing nothing but handling itimer signals.
-  while (atomic_load(&TheThread->SidelineExit, memory_order_relaxed) == 0)
-    sched_yield();
-
-  if (!Thread->adjustTimer(0))
-    VPrintf(1, "Failed to disable timer\n");
-
-  VPrintf(1, "Sideline thread exiting\n");
-  return 0;
-}
-
-bool SidelineThread::launchThread(SidelineFunc takeSample, void *Arg,
-                                  u32 FreqMilliSec) {
-  // This can only be called once.  However, we can't clear a field in
-  // the constructor and check for that here as the constructor for
-  // a static instance is called *after* our module_ctor and thus after
-  // this routine!  Thus we rely on the TheThread check below.
-  CHECK(TheThread == nullptr); // Only one sideline thread is supported.
-  TheThread = this;
-  sampleFunc = takeSample;
-  FuncArg = Arg;
-  Freq = FreqMilliSec;
-  atomic_store(&SidelineExit, 0, memory_order_relaxed);
-
-  // We do without a guard page.
-  Stack = static_cast<char*>(MmapOrDie(SidelineStackSize, "SidelineStack"));
-  // We need to handle the return value from internal_clone() not having been
-  // assigned yet (for our CHECK in adjustTimer()) so we ensure this has a
-  // sentinel value.
-  SidelineId = SidelineIdUninitialized;
-  // By omitting CLONE_THREAD, the child is in its own thread group and will not
-  // receive any of the application's signals.
-  SidelineId = internal_clone(
-      runSideline, Stack + SidelineStackSize,
-      CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_UNTRACED,
-      this, nullptr /* parent_tidptr */,
-      nullptr /* newtls */, nullptr /* child_tidptr */);
-  int ErrCode;
-  if (internal_iserror(SidelineId, &ErrCode)) {
-    Printf("FATAL: EfficiencySanitizer failed to spawn a thread (code %d).\n",
-           ErrCode);
-    Die();
-    return false; // Not reached.
-  }
-  return true;
-}
-
-bool SidelineThread::joinThread() {
-  VPrintf(1, "Joining sideline thread\n");
-  bool Res = true;
-  atomic_store(&SidelineExit, 1, memory_order_relaxed);
-  while (true) {
-    uptr Status = internal_waitpid(SidelineId, nullptr, __WALL);
-    int ErrCode;
-    if (!internal_iserror(Status, &ErrCode))
-      break;
-    if (ErrCode == EINTR)
-      continue;
-    VPrintf(1, "Failed to join sideline thread (errno %d)\n", ErrCode);
-    Res = false;
-    break;
-  }
-  UnmapOrDie(Stack, SidelineStackSize);
-  return Res;
-}
-
-// Must be called from the sideline thread itself.
-bool SidelineThread::adjustTimer(u32 FreqMilliSec) {
-  // The return value of internal_clone() may not have been assigned yet:
-  CHECK(internal_getpid() == SidelineId ||
-        SidelineId == SidelineIdUninitialized);
-  Freq = FreqMilliSec;
-  struct itimerval TimerVal;
-  TimerVal.it_interval.tv_sec = (time_t) Freq / 1000;
-  TimerVal.it_interval.tv_usec = (time_t) (Freq % 1000) * 1000;
-  TimerVal.it_value.tv_sec = (time_t) Freq / 1000;
-  TimerVal.it_value.tv_usec = (time_t) (Freq % 1000) * 1000;
-  // As we're in a different thread group, we cannot use either
-  // ITIMER_PROF or ITIMER_VIRTUAL without taking up scheduled
-  // time ourselves: thus we must use real time.
-  int Res = setitimer(ITIMER_REAL, &TimerVal, nullptr);
-  return (Res == 0);
-}
-
-} // namespace __esan
-
-#endif // SANITIZER_LINUX

compiler-rt/lib/esan/working_set.h

-//===-- working_set.h -------------------------------------------*- C++ -*-===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-//
-// This file is a part of EfficiencySanitizer, a family of performance tuners.
-//
-// Header for working-set-specific code.
-//===----------------------------------------------------------------------===//
-
-#ifndef WORKING_SET_H
-#define WORKING_SET_H
-
-#include "interception/interception.h"
-#include "sanitizer_common/sanitizer_internal_defs.h"
-
-namespace __esan {
-
-void initializeWorkingSet();
-void initializeShadowWorkingSet();
-int finalizeWorkingSet();
-void reportWorkingSet();
-unsigned int getSampleCountWorkingSet();
-void processRangeAccessWorkingSet(uptr PC, uptr Addr, SIZE_T Size,
-                                  bool IsWrite);
-
-// Platform-dependent.
-void registerMemoryFaultHandler();
-bool processWorkingSetSignal(int SigNum, void (*Handler)(int),
-                             void (**Result)(int));
-bool processWorkingSetSigaction(int SigNum, const void *Act, void *OldAct);
-bool processWorkingSetSigprocmask(int How, void *Set, void *OldSet);
-
-} // namespace __esan
-
-#endif // WORKING_SET_H

compiler-rt/lib/esan/working_set.cpp

-//===-- working_set.cpp ---------------------------------------------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-//
-// This file is a part of EfficiencySanitizer, a family of performance tuners.
-//
-// This file contains working-set-specific code.
-//===----------------------------------------------------------------------===//
-
-#include "working_set.h"
-#include "esan.h"
-#include "esan_circular_buffer.h"
-#include "esan_flags.h"
-#include "esan_shadow.h"
-#include "esan_sideline.h"
-#include "sanitizer_common/sanitizer_procmaps.h"
-
-// We shadow every cache line of app memory with one shadow byte.
-// - The highest bit of each shadow byte indicates whether the corresponding
-//   cache line has ever been accessed.
-// - The lowest bit of each shadow byte indicates whether the corresponding
-//   cache line was accessed since the last sample.
-// - The other bits are used for working set snapshots at successively
-//   lower frequencies, each bit to the left from the lowest bit stepping
-//   down the frequency by 2 to the power of getFlags()->snapshot_step.
-// Thus we have something like this:
-//   Bit 0: Since last sample
-//   Bit 1: Since last 2^2 samples
-//   Bit 2: Since last 2^4 samples
-//   Bit 3: ...
-//   Bit 7: Ever accessed.
-// We live with races in accessing each shadow byte.
-typedef unsigned char byte;
-
-namespace __esan {
-
-// Our shadow memory assumes that the line size is 64.
-static const u32 CacheLineSize = 64;
-
-// See the shadow byte layout description above.
-static const u32 TotalWorkingSetBitIdx = 7;
-// We accumulate to the left until we hit this bit.
-// We don't need to accumulate to the final bit as it's set on each ref
-// by the compiler instrumentation.
-static const u32 MaxAccumBitIdx = 6;
-static const u32 CurWorkingSetBitIdx = 0;
-static const byte ShadowAccessedVal =
-  (1 << TotalWorkingSetBitIdx) | (1 << CurWorkingSetBitIdx);
-
-static SidelineThread Thread;
-// If we use real-time-based timer samples this won't overflow in any realistic
-// scenario, but if we switch to some other unit (such as memory accesses) we
-// may want to consider a 64-bit int.
-static u32 SnapshotNum;
-
-// We store the wset size for each of 8 different sampling frequencies.
-static const u32 NumFreq = 8; // One for each bit of our shadow bytes.
-// We cannot use static objects as the global destructor is called
-// prior to our finalize routine.
-// These are each circular buffers, sized up front.
-CircularBuffer<u32> SizePerFreq[NumFreq];
-// We cannot rely on static initializers (they may run too late) but
-// we record the size here for clarity:
-u32 CircularBufferSizes[NumFreq] = {
-  // These are each mmap-ed so our minimum is one page.
-  32*1024,
-  16*1024,
-  8*1024,
-  4*1024,
-  4*1024,
-  4*1024,
-  4*1024,
-  4*1024,
-};
-
-void processRangeAccessWorkingSet(uptr PC, uptr Addr, SIZE_T Size,
-                                  bool IsWrite) {
-  if (Size == 0)
-    return;
-  SIZE_T I = 0;
-  uptr LineSize = getFlags()->cache_line_size;
-  // As Addr+Size could overflow at the top of a 32-bit address space,
-  // we avoid the simpler formula that rounds the start and end.
-  SIZE_T NumLines = Size / LineSize +
-    // Add any extra at the start or end adding on an extra line:
-    (LineSize - 1 + Addr % LineSize + Size % LineSize) / LineSize;
-  byte *Shadow = (byte *)appToShadow(Addr);
-  // Write shadow bytes until we're word-aligned.
-  while (I < NumLines && (uptr)Shadow % 4 != 0) {
-    if ((*Shadow & ShadowAccessedVal) != ShadowAccessedVal)
-      *Shadow |= ShadowAccessedVal;
-    ++Shadow;
-    ++I;
-  }
-  // Write whole shadow words at a time.
-  // Using a word-stride loop improves the runtime of a microbenchmark of
-  // memset calls by 10%.
-  u32 WordValue = ShadowAccessedVal | ShadowAccessedVal << 8 |
-    ShadowAccessedVal << 16 | ShadowAccessedVal << 24;
-  while (I + 4 <= NumLines) {
-    if ((*(u32*)Shadow & WordValue) != WordValue)
-      *(u32*)Shadow |= WordValue;
-    Shadow += 4;
-    I += 4;
-  }
-  // Write any trailing shadow bytes.
-  while (I < NumLines) {
-    if ((*Shadow & ShadowAccessedVal) != ShadowAccessedVal)
-      *Shadow |= ShadowAccessedVal;
-    ++Shadow;
-    ++I;
-  }
-}
-
-// This routine will word-align ShadowStart and ShadowEnd prior to scanning.
-// It does *not* clear for BitIdx==TotalWorkingSetBitIdx, as that top bit
-// measures the access during the entire execution and should never be cleared.
-static u32 countAndClearShadowValues(u32 BitIdx, uptr ShadowStart,
-                                     uptr ShadowEnd) {
-  u32 WorkingSetSize = 0;
-  u32 ByteValue = 0x1 << BitIdx;
-  u32 WordValue = ByteValue | ByteValue << 8 | ByteValue << 16 |
-    ByteValue << 24;
-  // Get word aligned start.
-  ShadowStart = RoundDownTo(ShadowStart, sizeof(u32));
-  bool Accum = getFlags()->record_snapshots && BitIdx < MaxAccumBitIdx;
-  // Do not clear the bit that measures access during the entire execution.
-  bool Clear = BitIdx < TotalWorkingSetBitIdx;
-  for (u32 *Ptr = (u32 *)ShadowStart; Ptr < (u32 *)ShadowEnd; ++Ptr) {
-    if ((*Ptr & WordValue) != 0) {
-      byte *BytePtr = (byte *)Ptr;
-      for (u32 j = 0; j < sizeof(u32); ++j) {
-        if (BytePtr[j] & ByteValue) {
-          ++WorkingSetSize;
-          if (Accum) {
-            // Accumulate to the lower-frequency bit to the left.
-            BytePtr[j] |= (ByteValue << 1);
-          }
-        }
-      }
-      if (Clear) {
-        // Clear this bit from every shadow byte.
-        *Ptr &= ~WordValue;
-      }
-    }
-  }
-  return WorkingSetSize;
-}
-
-// Scan shadow memory to calculate the number of cache lines being accessed,
-// i.e., the number of non-zero bits indexed by BitIdx in each shadow byte.
-// We also clear the lowest bits (most recent working set snapshot).
-// We do *not* clear for BitIdx==TotalWorkingSetBitIdx, as that top bit
-// measures the access during the entire execution and should never be cleared.
-static u32 computeWorkingSizeAndReset(u32 BitIdx) {
-  u32 WorkingSetSize = 0;
-  MemoryMappingLayout MemIter(true/*cache*/);
-  MemoryMappedSegment Segment;
-  while (MemIter.Next(&Segment)) {
-    VPrintf(4, "%s: considering %p-%p app=%d shadow=%d prot=%u\n", __FUNCTION__,
-            Segment.start, Segment.end, Segment.protection,
-            isAppMem(Segment.start), isShadowMem(Segment.start));
-    if (isShadowMem(Segment.start) && Segment.IsWritable()) {
-      VPrintf(3, "%s: walking %p-%p\n", __FUNCTION__, Segment.start,
-              Segment.end);
-      WorkingSetSize +=
-          countAndClearShadowValues(BitIdx, Segment.start, Segment.end);
-    }
-  }
-  return WorkingSetSize;
-}
-
-// This is invoked from a signal handler but in a sideline thread doing nothing
-// else so it is a little less fragile than a typical signal handler.
-static void takeSample(void *Arg) {
-  u32 BitIdx = CurWorkingSetBitIdx;
-  u32 Freq = 1;
-  ++SnapshotNum; // Simpler to skip 0 whose mod matches everything.
-  while (BitIdx <= MaxAccumBitIdx && (SnapshotNum % Freq) == 0) {
-    u32 NumLines = computeWorkingSizeAndReset(BitIdx);
-    VReport(1, "%s: snapshot #%5d bit %d freq %4d: %8u\n", SanitizerToolName,
-            SnapshotNum, BitIdx, Freq, NumLines);
-    SizePerFreq[BitIdx].push_back(NumLines);
-    Freq = Freq << getFlags()->snapshot_step;
-    BitIdx++;
-  }
-}
-
-unsigned int getSampleCountWorkingSet()
-{
-  return SnapshotNum;
-}
-
-// Initialization that must be done before any instrumented code is executed.
-void initializeShadowWorkingSet() {
-  CHECK(getFlags()->cache_line_size == CacheLineSize);
-  registerMemoryFaultHandler();
-}
-
-void initializeWorkingSet() {
-  if (getFlags()->record_snapshots) {
-    for (u32 i = 0; i < NumFreq; ++i)
-      SizePerFreq[i].initialize(CircularBufferSizes[i]);
-    Thread.launchThread(takeSample, nullptr, getFlags()->sample_freq);
-  }
-}
-
-static u32 getPeriodForPrinting(u32 MilliSec, const char *&Unit) {
-  if (MilliSec > 600000) {
-    Unit = "min";
-    return MilliSec / 60000;
-  } else if (MilliSec > 10000) {
-    Unit = "sec";
-    return MilliSec / 1000;
-  } else {
-    Unit = "ms";
-    return MilliSec;
-  }
-}
-
-static u32 getSizeForPrinting(u32 NumOfCachelines, const char *&Unit) {
-  // We need a constant to avoid software divide support:
-  static const u32 KilobyteCachelines = (0x1 << 10) / CacheLineSize;
-  static const u32 MegabyteCachelines = KilobyteCachelines << 10;
-
-  if (NumOfCachelines > 10 * MegabyteCachelines) {
-    Unit = "MB";
-    return NumOfCachelines / MegabyteCachelines;
-  } else if (NumOfCachelines > 10 * KilobyteCachelines) {
-    Unit = "KB";
-    return NumOfCachelines / KilobyteCachelines;
-  } else {
-    Unit = "Bytes";
-    return NumOfCachelines * CacheLineSize;
-  }
-}
-
-void reportWorkingSet() {
-  const char *Unit;
-  if (getFlags()->record_snapshots) {
-    u32 Freq = 1;
-    Report(" Total number of samples: %u\n", SnapshotNum);
-    for (u32 i = 0; i < NumFreq; ++i) {
-      u32 Time = getPeriodForPrinting(getFlags()->sample_freq*Freq, Unit);
-      Report(" Samples array #%d at period %u %s\n", i, Time, Unit);
-      // FIXME: report whether we wrapped around and thus whether we
-      // have data on the whole run or just the last N samples.
-      for (u32 j = 0; j < SizePerFreq[i].size(); ++j) {
-        u32 Size = getSizeForPrinting(SizePerFreq[i][j], Unit);
-        Report("#%4d: %8u %s (%9u cache lines)\n", j, Size, Unit,
-               SizePerFreq[i][j]);
-      }
-      Freq = Freq << getFlags()->snapshot_step;
-    }
-  }
-
-  // Get the working set size for the entire execution.
-  u32 NumOfCachelines = computeWorkingSizeAndReset(TotalWorkingSetBitIdx);
-  u32 Size = getSizeForPrinting(NumOfCachelines, Unit);
-  Report(" %s: the total working set size: %u %s (%u cache lines)\n",
-         SanitizerToolName, Size, Unit, NumOfCachelines);
-}
-
-int finalizeWorkingSet() {
-  if (getFlags()->record_snapshots)
-    Thread.joinThread();
-  reportWorkingSet();
-  if (getFlags()->record_snapshots) {
-    for (u32 i = 0; i < NumFreq; ++i)
-      SizePerFreq[i].free();
-  }
-  return 0;
-}
-
-} // namespace __esan

compiler-rt/lib/esan/working_set_posix.cpp

-//===-- working_set_posix.cpp -----------------------------------*- C++ -*-===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-//
-// This file is a part of EfficiencySanitizer, a family of performance tuners.
-//
-// POSIX-specific working set tool code.
-//===----------------------------------------------------------------------===//
-
-#include "working_set.h"
-#include "esan_flags.h"
-#include "esan_shadow.h"
-#include "sanitizer_common/sanitizer_common.h"
-#include "sanitizer_common/sanitizer_linux.h"
-#include <signal.h>
-#include <sys/mman.h>
-
-namespace __esan {
-
-// We only support regular POSIX threads with a single signal handler
-// for the whole process == thread group.
-// Thus we only need to store one app signal handler.
-// FIXME: Store and use any alternate stack and signal flags set by
-// the app.  For now we just call the app handler from our handler.
-static __sanitizer_sigaction AppSigAct;
-
-bool processWorkingSetSignal(int SigNum, void (*Handler)(int),
-                             void (**Result)(int)) {
-  VPrintf(2, "%s: %d\n", __FUNCTION__, SigNum);
-  if (SigNum == SIGSEGV) {
-    *Result = AppSigAct.handler;
-    AppSigAct.sigaction = (decltype(AppSigAct.sigaction))Handler;
-    return false; // Skip real call.
-  }
-  return true;
-}
-
-bool processWorkingSetSigaction(int SigNum, const void *ActVoid,
-                                void *OldActVoid) {
-  VPrintf(2, "%s: %d\n", __FUNCTION__, SigNum);
-  if (SigNum == SIGSEGV) {
-    const struct sigaction *Act = (const struct sigaction *) ActVoid;
-    struct sigaction *OldAct = (struct sigaction *) OldActVoid;
-    if (OldAct)
-      internal_memcpy(OldAct, &AppSigAct, sizeof(OldAct));
-    if (Act)
-      internal_memcpy(&AppSigAct, Act, sizeof(AppSigAct));
-    return false; // Skip real call.
-  }
-  return true;
-}
-
-bool processWorkingSetSigprocmask(int How, void *Set, void *OldSet) {
-  VPrintf(2, "%s\n", __FUNCTION__);
-  // All we need to do is ensure that SIGSEGV is not blocked.
-  // FIXME: we are not fully transparent as we do not pretend that
-  // SIGSEGV is still blocked on app queries: that would require
-  // per-thread mask tracking.
-  if (Set && (How == SIG_BLOCK || How == SIG_SETMASK)) {
-    if (internal_sigismember((__sanitizer_sigset_t *)Set, SIGSEGV)) {
-      VPrintf(1, "%s: removing SIGSEGV from the blocked set\n", __FUNCTION__);
-      internal_sigdelset((__sanitizer_sigset_t *)Set, SIGSEGV);
-    }
-  }
-  return true;
-}
-
-static void reinstateDefaultHandler(int SigNum) {
-  __sanitizer_sigaction SigAct;
-  internal_memset(&SigAct, 0, sizeof(SigAct));
-  SigAct.sigaction = (decltype(SigAct.sigaction))SIG_DFL;
-  int Res = internal_sigaction(SigNum, &SigAct, nullptr);
-  CHECK(Res == 0);
-  VPrintf(1, "Unregistered for %d handler\n", SigNum);
-}
-
-// If this is a shadow fault, we handle it here; otherwise, we pass it to the
-// app to handle it just as the app would do without our tool in place.
-static void handleMemoryFault(int SigNum, __sanitizer_siginfo *Info,
-                              void *Ctx) {
-  if (SigNum == SIGSEGV) {
-    // We rely on si_addr being filled in (thus we do not support old kernels).
-    siginfo_t *SigInfo = (siginfo_t *)Info;
-    uptr Addr = (uptr)SigInfo->si_addr;
-    if (isShadowMem(Addr)) {
-      VPrintf(3, "Shadow fault @%p\n", Addr);
-      uptr PageSize = GetPageSizeCached();
-      int Res = internal_mprotect((void *)RoundDownTo(Addr, PageSize),
-                                  PageSize, PROT_READ|PROT_WRITE);
-      CHECK(Res == 0);
-    } else if (AppSigAct.sigaction) {
-      // FIXME: For simplicity we ignore app options including its signal stack
-      // (we just use ours) and all the delivery flags.
-      AppSigAct.sigaction(SigNum, Info, Ctx);
-    } else {
-      // Crash instead of spinning with infinite faults.
-      reinstateDefaultHandler(SigNum);
-    }
-  } else
-    UNREACHABLE("signal not registered");
-}
-
-void registerMemoryFaultHandler() {
-  // We do not use an alternate signal stack, as doing so would require
-  // setting it up for each app thread.
-  // FIXME: This could result in problems with emulating the app's signal
-  // handling if the app relies on an alternate stack for SIGSEGV.
-
-  // We require that SIGSEGV is not blocked.  We use a sigprocmask
-  // interceptor to ensure that in the future.  Here we ensure it for
-  // the current thread.  We assume there are no other threads at this
-  // point during initialization, or that at least they do not block
-  // SIGSEGV.
-  __sanitizer_sigset_t SigSet;
-  internal_sigemptyset(&SigSet);
-  internal_sigprocmask(SIG_BLOCK, &SigSet, nullptr);
-
-  __sanitizer_sigaction SigAct;
-  internal_memset(&SigAct, 0, sizeof(SigAct));
-  SigAct.sigaction = handleMemoryFault;
-  // We want to handle nested signals b/c we need to handle a
-  // shadow fault in an app signal handler.
-  SigAct.sa_flags = SA_SIGINFO | SA_NODEFER;
-  int Res = internal_sigaction(SIGSEGV, &SigAct, &AppSigAct);
-  CHECK(Res == 0);
-  VPrintf(1, "Registered for SIGSEGV handler\n");
-}
-
-} // namespace __esan

compiler-rt/lib/sanitizer_common/CMakeLists.txt

set(SANITIZER_SOURCES_NOTERMINATION
   sanitizer_stoptheworld_mac.cc
   sanitizer_suppressions.cc
   sanitizer_tls_get_addr.cc
   sanitizer_thread_registry.cc
   sanitizer_type_traits.cc
   sanitizer_win.cc
   )
 
-if(UNIX AND NOT APPLE AND NOT OS_NAME MATCHES "SunOS")
-  list(APPEND SANITIZER_SOURCES_NOTERMINATION
-    sanitizer_linux_x86_64.S)
-  list(APPEND SANITIZER_SOURCES_NOTERMINATION
-    sanitizer_linux_mips64.S)
-endif()
-
 set(SANITIZER_SOURCES
   ${SANITIZER_SOURCES_NOTERMINATION} sanitizer_termination.cc)
 
 # Libc functions stubs. These sources should be linked instead of
 # SANITIZER_LIBCDEP_SOURCES when sanitizer_common library must not depend on
 # libc.
 set(SANITIZER_NOLIBC_SOURCES
   sanitizer_common_nolibc.cc)

 set(SANITIZER_CFLAGS ${SANITIZER_COMMON_CFLAGS})
 append_rtti_flag(OFF SANITIZER_CFLAGS)
 
 append_list_if(SANITIZER_LIMIT_FRAME_SIZE -Wframe-larger-than=570
                SANITIZER_CFLAGS)
 append_list_if(COMPILER_RT_HAS_WGLOBAL_CONSTRUCTORS_FLAG -Wglobal-constructors
                SANITIZER_CFLAGS)
 
-if (LLVM_ENABLE_PEDANTIC AND UNIX AND NOT APPLE)
-  # With -pedantic, our .S files raise warnings about empty macro arguments
-  # from __USER_LABEL_PREFIX__ being an empty arg to GLUE().  Unfortunately,
-  # there is no simple way to test for an empty define, nor to disable just
-  # that warning or to disable -pedantic.  There is also no simple way to
-  # remove -pedantic from just this file (we'd have to remove from
-  # CMAKE_C*_FLAGS and re-add as a source property to all the non-.S files).
-  set_source_files_properties(sanitizer_linux_x86_64.S
-    PROPERTIES COMPILE_FLAGS "-w")
-  set_source_files_properties(sanitizer_linux_mips64.S
-    PROPERTIES COMPILE_FLAGS "-w")
-endif ()
-
 if(APPLE)
   set(OS_OPTION OS ${SANITIZER_COMMON_SUPPORTED_OS})
 endif()
 
 add_compiler_rt_object_libraries(RTSanitizerCommon
   ${OS_OPTION}
   ARCHS ${SANITIZER_COMMON_SUPPORTED_ARCH}
   SOURCES ${SANITIZER_SOURCES}

compiler-rt/lib/sanitizer_common/sanitizer_common.h

 u32 GetUid();
 void ReExec();
 void CheckASLR();
 void CheckMPROTECT();
 char **GetArgv();
 char **GetEnviron();
 void PrintCmdline();
 bool StackSizeIsUnlimited();
-uptr GetStackSizeLimitInBytes();
 void SetStackSizeLimitInBytes(uptr limit);
 bool AddressSpaceIsUnlimited();
 void SetAddressSpaceUnlimited();
 void AdjustStackSize(void *attr);
 void PlatformPrepareForSandboxing(__sanitizer_sandbox_arguments *args);
 void SetSandboxingCallback(void (*f)());
 
 void InitializeCoverage(bool enabled, const char *coverage_dir);

compiler-rt/lib/sanitizer_common/sanitizer_internal_defs.h

do {                                    \
     (void)enable_fp;                      \
   } while (0)
 
 }  // namespace __sanitizer
 
 namespace __asan  { using namespace __sanitizer; }  // NOLINT
 namespace __dsan  { using namespace __sanitizer; }  // NOLINT
 namespace __dfsan { using namespace __sanitizer; }  // NOLINT
-namespace __esan  { using namespace __sanitizer; }  // NOLINT
 namespace __lsan  { using namespace __sanitizer; }  // NOLINT
 namespace __msan  { using namespace __sanitizer; }  // NOLINT
 namespace __hwasan  { using namespace __sanitizer; }  // NOLINT
 namespace __tsan  { using namespace __sanitizer; }  // NOLINT
 namespace __scudo { using namespace __sanitizer; }  // NOLINT
 namespace __ubsan { using namespace __sanitizer; }  // NOLINT
 namespace __xray  { using namespace __sanitizer; }  // NOLINT
 namespace __interception  { using namespace __sanitizer; }  // NOLINT
 namespace __hwasan  { using namespace __sanitizer; }  // NOLINT
 
 
 #endif  // SANITIZER_DEFS_H

compiler-rt/lib/sanitizer_common/sanitizer_linux.h

 
 // Linux-only syscalls.
 #if SANITIZER_LINUX
 uptr internal_prctl(int option, uptr arg2, uptr arg3, uptr arg4, uptr arg5);
 // Used only by sanitizer_stoptheworld. Signal handlers that are actually used
 // (like the process-wide error reporting SEGV handler) must use
 // internal_sigaction instead.
 int internal_sigaction_norestorer(int signum, const void *act, void *oldact);
-#if (defined(__x86_64__) || SANITIZER_MIPS64) && !SANITIZER_GO
-// Uses a raw system call to avoid interceptors.
-int internal_sigaction_syscall(int signum, const void *act, void *oldact);
-#endif
 void internal_sigdelset(__sanitizer_sigset_t *set, int signum);
 #if defined(__x86_64__) || defined(__mips__) || defined(__aarch64__) \
   || defined(__powerpc64__) || defined(__s390__) || defined(__i386__) \
   || defined(__arm__)
 uptr internal_clone(int (*fn)(void *), void *child_stack, int flags, void *arg,
                     int *parent_tidptr, void *newtls, int *child_tidptr);
 #endif
 #elif SANITIZER_FREEBSD

compiler-rt/lib/sanitizer_common/sanitizer_linux.cc

 // but it still needs to use 64-bit syscalls.
 #if SANITIZER_LINUX && (defined(__x86_64__) || defined(__powerpc64__) ||       \
                         SANITIZER_WORDSIZE == 64)
 # define SANITIZER_LINUX_USES_64BIT_SYSCALLS 1
 #else
 # define SANITIZER_LINUX_USES_64BIT_SYSCALLS 0
 #endif
 
-#if defined(__x86_64__) || SANITIZER_MIPS64
-extern "C" {
-extern void internal_sigreturn();
-}
-#endif
-
 // Note : FreeBSD had implemented both
 // Linux and OpenBSD apis, available from
 // future 12.x version most likely
 #if SANITIZER_LINUX && defined(__NR_getrandom)
 # if !defined(GRND_NONBLOCK)
 #  define GRND_NONBLOCK 1
 # endif
 # define SANITIZER_USE_GETRANDOM 1
internal_memcpy(&u_oldact->sa_mask, &k_oldact.sa_mask,
                     sizeof(__sanitizer_kernel_sigset_t));
     u_oldact->sa_flags = k_oldact.sa_flags;
 #if !SANITIZER_ANDROID || !SANITIZER_MIPS32
     u_oldact->sa_restorer = k_oldact.sa_restorer;
 #endif
   }
   return result;
 }
-
-// Invokes sigaction via a raw syscall with a restorer, but does not support
-// all platforms yet.
-// We disable for Go simply because we have not yet added to buildgo.sh.
-#if (defined(__x86_64__) || SANITIZER_MIPS64) && !SANITIZER_GO
-int internal_sigaction_syscall(int signum, const void *act, void *oldact) {
-  if (act == nullptr)
-    return internal_sigaction_norestorer(signum, act, oldact);
-  __sanitizer_sigaction u_adjust;
-  internal_memcpy(&u_adjust, act, sizeof(u_adjust));
-#if !SANITIZER_ANDROID || !SANITIZER_MIPS32
-  if (u_adjust.sa_restorer == nullptr) {
-    u_adjust.sa_restorer = internal_sigreturn;
-  }
-#endif
-  return internal_sigaction_norestorer(signum, (const void *)&u_adjust, oldact);
-}
-#endif  // defined(__x86_64__) && !SANITIZER_GO
 #endif  // SANITIZER_LINUX
 
 uptr internal_sigprocmask(int how, __sanitizer_sigset_t *set,
                           __sanitizer_sigset_t *oldset) {
 #if SANITIZER_FREEBSD || SANITIZER_OPENBSD
   return internal_syscall(SYSCALL(sigprocmask), how, set, oldset);
 #else
   __sanitizer_kernel_sigset_t *k_set = (__sanitizer_kernel_sigset_t *)set;

compiler-rt/lib/sanitizer_common/sanitizer_linux_mips64.S

-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-
-#include "sanitizer_common/sanitizer_asm.h"
-
-// Avoid being marked as needing an executable stack:
-NO_EXEC_STACK_DIRECTIVE
-
-// Further contents are mips64 only:
-#if defined(__linux__) && defined(__mips64)
-
-.section .text
-.set noreorder
-.globl internal_sigreturn
-.type internal_sigreturn, @function
-internal_sigreturn:
-
-        li $v0,5211 // #5211 is for SYS_rt_sigreturn
-        syscall
-
-.size internal_sigreturn, .-internal_sigreturn
-
-#endif // defined(__linux__) && defined(__mips64)

compiler-rt/lib/sanitizer_common/sanitizer_linux_x86_64.S

-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-
-#include "sanitizer_common/sanitizer_asm.h"
-
-// Avoid being marked as needing an executable stack:
-NO_EXEC_STACK_DIRECTIVE
-
-// Further contents are x86_64-only:
-#if defined(__linux__) && defined(__x86_64__)
-
-#include "../builtins/assembly.h"
-
-// If the "naked" function attribute were supported for x86 we could
-// do this via inline asm.
-.text
-.balign 4
-DEFINE_COMPILERRT_FUNCTION(internal_sigreturn)
-        mov           $0xf,             %eax    // 0xf == SYS_rt_sigreturn
-        mov           %rcx,             %r10
-        syscall
-        ret                                     // Won't normally reach here.
-END_COMPILERRT_FUNCTION(internal_sigreturn)
-
-#endif // defined(__linux__) && defined(__x86_64__)

compiler-rt/lib/sanitizer_common/sanitizer_posix_libcdep.cc

void DisableCoreDumperIfNecessary() {
   }
 }
 
 bool StackSizeIsUnlimited() {
   rlim_t stack_size = getlim(RLIMIT_STACK);
   return (stack_size == RLIM_INFINITY);
 }
 
-uptr GetStackSizeLimitInBytes() {
-  return (uptr)getlim(RLIMIT_STACK);
-}
-
 void SetStackSizeLimitInBytes(uptr limit) {
   setlim(RLIMIT_STACK, (rlim_t)limit);
   CHECK(!StackSizeIsUnlimited());
 }
 
 bool AddressSpaceIsUnlimited() {
   rlim_t as_size = getlim(RLIMIT_AS);
   return (as_size == RLIM_INFINITY);

compiler-rt/test/esan/CMakeLists.txt

-set(ESAN_TEST_DEPS ${SANITIZER_COMMON_LIT_TEST_DEPS})
-if(NOT COMPILER_RT_STANDALONE_BUILD)
-  list(APPEND ESAN_TEST_DEPS esan)
-endif()
-
-set(ESAN_TESTSUITES)
-
-set(ESAN_TEST_ARCH ${ESAN_SUPPORTED_ARCH})
-
-set(ESAN_LIT_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR})
-
-foreach(arch ${ESAN_TEST_ARCH})
-  set(ESAN_TEST_TARGET_ARCH ${arch})
-  string(TOLOWER "-${arch}" ESAN_TEST_CONFIG_SUFFIX)
-  get_target_flags_for_arch(${arch} ESAN_TEST_TARGET_CFLAGS)
-  string(REPLACE ";" " " ESAN_TEST_TARGET_CFLAGS "${ESAN_TEST_TARGET_CFLAGS}")
-
-  string(TOUPPER ${arch} ARCH_UPPER_CASE)
-  set(CONFIG_NAME ${ARCH_UPPER_CASE}Config)
-
-  configure_lit_site_cfg(
-    ${CMAKE_CURRENT_SOURCE_DIR}/lit.site.cfg.in
-    ${CMAKE_CURRENT_BINARY_DIR}/${CONFIG_NAME}/lit.site.cfg)
-  list(APPEND ESAN_TESTSUITES ${CMAKE_CURRENT_BINARY_DIR}/${CONFIG_NAME})
-endforeach()
-
-# TODO(bruening): add Unit/ tests as well
-
-add_lit_testsuite(check-esan "Running EfficiencySanitizer tests"
-  ${ESAN_TESTSUITES}
-  DEPENDS ${ESAN_TEST_DEPS})
-set_target_properties(check-esan PROPERTIES FOLDER "Compiler-RT Misc")

compiler-rt/test/esan/TestCases/large-stack-linux.c

-// RUN: %clang_esan_wset -O0 %s -o %t 2>&1
-// RUN: %env_esan_opts="verbosity=1 record_snapshots=0" %run %t %t 2>&1 | FileCheck %s
-// Stucks at init and no clone feature equivalent.
-// UNSUPPORTED: freebsd
-
-#include <assert.h>
-#include <stdio.h>
-#include <sys/mman.h>
-#include <sys/resource.h>
-#include <sys/types.h>
-#include <sys/wait.h>
-#include <unistd.h>
-
-static void testChildStackLimit(rlim_t StackLimit, char *ToRun) {
-  int Res;
-  struct rlimit Limit;
-  Limit.rlim_cur = RLIM_INFINITY;
-  Limit.rlim_max = RLIM_INFINITY;
-  Res = setrlimit(RLIMIT_STACK, &Limit);
-  if (Res != 0) {
-    // Probably our environment had a large limit and we ourselves got
-    // re-execed and can no longer raise our limit.
-    // We have to bail and emulate the regular test.
-    // We'd prefer to have branches in our FileCheck output to ensure the
-    // initial program was re-execed but this is the best we can do for now.
-    fprintf(stderr, "in esan::initializeLibrary\n");
-    fprintf(stderr, "==1234==The stack size limit is beyond the maximum supported.\n");
-    fprintf(stderr, "Re-execing with a stack size below 1TB.\n");
-    fprintf(stderr, "in esan::initializeLibrary\n");
-    fprintf(stderr, "done\n");
-    fprintf(stderr, "in esan::finalizeLibrary\n");
-    return;
-  }
-
-  pid_t Child = fork();
-  assert(Child >= 0);
-  if (Child > 0) {
-    pid_t WaitRes = waitpid(Child, NULL, 0);
-    assert(WaitRes == Child);
-  } else {
-    char *Args[2];
-    Args[0] = ToRun;
-    Args[1] = NULL;
-    Res = execv(ToRun, Args);
-    assert(0); // Should not be reached.
-  }
-}
-
-int main(int argc, char *argv[]) {
-  // The path to the program to exec must be passed in the first time.
-  if (argc == 2) {
-    fprintf(stderr, "Testing child with infinite stack\n");
-    testChildStackLimit(RLIM_INFINITY, argv[1]);
-    fprintf(stderr, "Testing child with 1TB stack\n");
-    testChildStackLimit(1ULL << 40, argv[1]);
-  }
-  fprintf(stderr, "done\n");
-  // CHECK:      in esan::initializeLibrary
-  // CHECK:      Testing child with infinite stack
-  // CHECK-NEXT: in esan::initializeLibrary
-  // CHECK-NEXT: =={{[0-9:]+}}==The stack size limit is beyond the maximum supported.
-  // CHECK-NEXT: Re-execing with a stack size below 1TB.
-  // CHECK-NEXT: in esan::initializeLibrary
-  // CHECK:      done
-  // CHECK:      in esan::finalizeLibrary
-  // CHECK:      Testing child with 1TB stack
-  // CHECK-NEXT: in esan::initializeLibrary
-  // CHECK-NEXT: =={{[0-9:]+}}==The stack size limit is beyond the maximum supported.
-  // CHECK-NEXT: Re-execing with a stack size below 1TB.
-  // CHECK-NEXT: in esan::initializeLibrary
-  // CHECK:      done
-  // CHECK-NEXT: in esan::finalizeLibrary
-  // CHECK:      done
-  // CHECK-NEXT: in esan::finalizeLibrary
-  return 0;
-}

compiler-rt/test/esan/TestCases/libc-intercept.c

-// RUN: %clang_esan_frag -O0 %s -o %t 2>&1
-// RUN: %env_esan_opts=verbosity=3 %run %t 2>&1 | FileCheck %s
-
-#include <string.h>
-
-int main(int argc, char **argv) {
-  char Buf[2048];
-  const char Str[] = "TestStringOfParticularLength"; // 29 chars.
-  strcpy(Buf, Str);
-  strncpy(Buf, Str, 17);
-  return strncmp(Buf, Str, 17);
-  // CHECK:      in esan::initializeLibrary
-  // CHECK:      in esan::processRangeAccess {{.*}} 29
-  // CHECK:      in esan::processRangeAccess {{.*}} 29
-  // CHECK:      in esan::processRangeAccess {{.*}} 17
-  // CHECK:      in esan::processRangeAccess {{.*}} 17
-  // CHECK:      in esan::processRangeAccess {{.*}} 17
-  // CHECK:      in esan::processRangeAccess {{.*}} 17
-  // CHECK:      in esan::finalizeLibrary
-}

compiler-rt/test/esan/TestCases/mmap-shadow-conflict.c

-// RUN: %clang_esan_frag -O0 %s -o %t 2>&1
-// RUN: %env_esan_opts=verbosity=1 %run %t 2>&1 | FileCheck --check-prefix=%arch --check-prefix=CHECK %s
-
-#include <unistd.h>
-#include <sys/mman.h>
-#include <stdio.h>
-
-int main(int argc, char **argv) {
-#if defined(__mips64)
-  void *Map = mmap((void *)0x0000001600000000ULL, 0x1000, PROT_READ,
-                   MAP_ANON|MAP_PRIVATE|MAP_FIXED, -1, 0);
-#else
-  void *Map = mmap((void *)0x0000016000000000ULL, 0x1000, PROT_READ,
-                   MAP_ANON|MAP_PRIVATE|MAP_FIXED, -1, 0);
-#endif
-  if (Map == (void *)-1)
-    fprintf(stderr, "map failed\n");
-  else
-    fprintf(stderr, "mapped %p\n", Map);
-#if defined(__mips64)
-  Map = mmap((void *)0x0000001600000000ULL, 0x1000, PROT_READ,
-                   MAP_ANON|MAP_PRIVATE, -1, 0);
-#else
-  Map = mmap((void *)0x0000016000000000ULL, 0x1000, PROT_READ,
-                   MAP_ANON|MAP_PRIVATE, -1, 0);
-#endif
-  fprintf(stderr, "mapped %p\n", Map);
-  // CHECK:      in esan::initializeLibrary
-  // (There can be a re-exec for stack limit here.)
-  // x86_64:      Shadow scale=2 offset=0x440000000000
-  // x86_64-NEXT: Shadow #0: [110000000000-114000000000) (256GB)
-  // x86_64-NEXT: Shadow #1: [124000000000-12c000000000) (512GB)
-  // x86_64-NEXT: Shadow #2: [148000000000-150000000000) (512GB)
-  // mips64:      Shadow scale=2 offset=0x4400000000
-  // mips64-NEXT: Shadow #0: [1140000000-1180000000) (1GB)
-  // mips64-NEXT: Shadow #1: [1380000000-13c0000000) (1GB)
-  // mips64-NEXT: Shadow #2: [14c0000000-1500000000) (1GB)
-  // CHECK-NEXT: mmap conflict: {{.*}}
-  // CHECK-NEXT: map failed
-  // CHECK-NEXT: mmap conflict: {{.*}}
-  // CHECK-NEXT: mapped {{.*}}
-  // CHECK-NEXT: in esan::finalizeLibrary
-  return 0;
-}

compiler-rt/test/esan/TestCases/struct-simple.cpp

-// RUN: %clang_esan_frag -O0 %s -DPART1 -mllvm -esan-aux-field-info=0 -c -o %t-part1.o 2>&1
-// RUN: %clang_esan_frag -O0 %s -DPART2 -c -o %t-part2.o 2>&1
-// RUN: %clang_esan_frag -O0 %s -DMAIN -c -o %t-main.o 2>&1
-// RUN: %clang_esan_frag -O0 %t-part1.o %t-part2.o %t-main.o -o %t 2>&1
-// RUN: %env_esan_opts=verbosity=2 %run %t 2>&1 | FileCheck %s
-
-// We generate two different object files from this file with different
-// macros, and then link them together. We do this to test how we handle
-// separate compilation with multiple compilation units.
-
-#include <stdio.h>
-
-extern "C" {
-  void part1();
-  void part2();
-}
-
-//===-- compilation unit part1 without main function ----------------------===//
-
-#ifdef PART1
-struct A {
-  int x;
-  int y;
-};
-
-struct B {
-  float m;
-  double n;
-};
-
-union U {
-  float f;
-  double d;
-};
-
-// Same struct in both main and part1.
-struct S {
-  int s1;
-  int s2;
-};
-
-// Different structs with the same name in main and part1.
-struct D {
-  int d1;
-  int d2;
-  struct {
-    int x;
-    int y;
-    int z;
-  } ds[10];
-};
-
-void part1()
-{
-  struct A a;
-  struct B b;
-  union  U u;
-  struct S s;
-  struct D d;
-  for (int i = 0; i < (1 << 11); i++)
-    a.x = 0;
-  a.y = 1;
-  b.m = 2.0;
-  for (int i = 0; i < (1 << 21); i++) {
-    b.n = 3.0;
-    d.ds[3].y = 0;
-  }
-  u.f = 0.0;
-  u.d = 1.0;
-  s.s1 = 0;
-  d.d1 = 0;
-}
-#endif // PART1
-
-//===-- compilation unit part2 without main function ----------------------===//
-#ifdef PART2
-// No struct in this part.
-void part2()
-{
-  // do nothing
-}
-#endif // PART2
-
-//===-- compilation unit with main function -------------------------------===//
-
-#ifdef MAIN
-class C {
-public:
-  struct {
-    int x;
-    int y;
-  } cs;
-  union {
-    float f;
-    double d;
-  } cu;
-  char c[10];
-};
-
-// Same struct in both main and part1.
-struct S {
-  int s1;
-  int s2;
-};
-
-// Different structs with the same name in main and part1.
-struct D {
-  int d1;
-  int d2;
-  int d3;
-};
-
-int main(int argc, char **argv) {
-  // CHECK:      in esan::initializeLibrary
-  // CHECK:      in esan::initializeCacheFrag
-  // CHECK-NEXT: in esan::processCompilationUnitInit
-  // CHECK-NEXT: in esan::processCacheFragCompilationUnitInit: {{.*}}struct-simple.cpp with 6 class(es)/struct(s)
-  // CHECK-NEXT:  Register struct.A$2$11$11: 2 fields
-  // CHECK-NEXT:  Register struct.B$2$3$2:   2 fields
-  // CHECK-NEXT:  Register union.U$1$3:      1 fields
-  // CHECK-NEXT:  Register struct.S$2$11$11: 2 fields
-  // CHECK-NEXT:  Register struct.D$3$14$11$11: 3 fields
-  // CHECK-NEXT:  Register struct.anon$3$11$11$11: 3 fields
-  // CHECK-NEXT: in esan::processCompilationUnitInit
-  // CHECK-NEXT: in esan::processCacheFragCompilationUnitInit: {{.*}}struct-simple.cpp with 0 class(es)/struct(s)
-  // CHECK-NEXT: in esan::processCompilationUnitInit
-  // CHECK-NEXT: in esan::processCacheFragCompilationUnitInit: {{.*}}struct-simple.cpp with 5 class(es)/struct(s)
-  // CHECK-NEXT:  Register class.C$3$14$13$13:  3 fields
-  // CHECK-NEXT:  Register struct.anon$2$11$11: 2 fields
-  // CHECK-NEXT:  Register union.anon$1$3:      1 fields
-  // CHECK-NEXT:  Duplicated struct.S$2$11$11:  2 fields
-  // CHECK-NEXT:  Register struct.D$3$11$11$11: 3 fields
-  struct C c[2];
-  struct S s;
-  struct D d;
-  c[0].cs.x = 0;
-  c[1].cs.y = 1;
-  c[0].cu.f = 0.0;
-  c[1].cu.d = 1.0;
-  c[0].c[2] = 0;
-  s.s1 = 0;
-  d.d1 = 0;
-  d.d2 = 0;
-  part1();
-  part2();
-  return 0;
-  // CHECK:      in esan::finalizeLibrary
-  // CHECK-NEXT: in esan::finalizeCacheFrag
-  // CHECK-NEXT: in esan::processCompilationUnitExit
-  // CHECK-NEXT: in esan::processCacheFragCompilationUnitExit: {{.*}}struct-simple.cpp with 5 class(es)/struct(s)
-  // CHECK-NEXT:  Unregister class.C$3$14$13$13:  3 fields
-  // CHECK-NEXT:   {{.*}} class C
-  // CHECK-NEXT:   {{.*}}  size = 32, count = 5, ratio = 3, array access = 5
-  // CHECK-NEXT:   {{.*}}  # 0: offset = 0,  size = 8,  count = 2, type = %struct.anon = type { i32, i32 }
-  // CHECK-NEXT:   {{.*}}  # 1: offset = 8,  size = 8,  count = 2, type = %union.anon = type { double }
-  // CHECK-NEXT:   {{.*}}  # 2: offset = 16, size = 10, count = 1, type = [10 x i8]
-  // CHECK-NEXT:  Unregister struct.anon$2$11$11: 2 fields
-  // CHECK-NEXT:   {{.*}} struct anon
-  // CHECK-NEXT:   {{.*}}  size = 8, count = 2, ratio = 1, array access = 0
-  // CHECK-NEXT:   {{.*}}  # 0: offset = 0, size = 4, count = 1, type = i32
-  // CHECK-NEXT:   {{.*}}  # 1: offset = 4, size = 4, count = 1, type = i32
-  // CHECK-NEXT:  Unregister union.anon$1$3:      1 fields
-  // CHECK-NEXT:  Unregister struct.S$2$11$11:    2 fields
-  // CHECK-NEXT:   {{.*}} struct S
-  // CHECK-NEXT:   {{.*}}  size = 8, count = 2, ratio = 2, array access = 0
-  // CHECK-NEXT:   {{.*}}  # 0: count = 2
-  // CHECK-NEXT:   {{.*}}  # 1: count = 0
-  // CHECK-NEXT:  Unregister struct.D$3$11$11$11: 3 fields
-  // CHECK-NEXT:   {{.*}} struct D
-  // CHECK-NEXT:   {{.*}}  size = 12, count = 2, ratio = 2, array access = 0
-  // CHECK-NEXT:   {{.*}}  # 0: offset = 0, size = 4, count = 1, type = i32
-  // CHECK-NEXT:   {{.*}}  # 1: offset = 4, size = 4, count = 1, type = i32
-  // CHECK-NEXT:   {{.*}}  # 2: offset = 8, size = 4, count = 0, type = i32
-  // CHECK-NEXT: in esan::processCompilationUnitExit
-  // CHECK-NEXT: in esan::processCacheFragCompilationUnitExit: {{.*}}struct-simple.cpp with 0 class(es)/struct(s)
-  // CHECK-NEXT: in esan::processCompilationUnitExit
-  // CHECK-NEXT: in esan::processCacheFragCompilationUnitExit: {{.*}}struct-simple.cpp with 6 class(es)/struct(s)
-  // CHECK-NEXT:  Unregister struct.A$2$11$11:    2 fields
-  // CHECK-NEXT:   {{.*}} struct A
-  // CHECK-NEXT:   {{.*}}  size = 8, count = 2049, ratio = 2048, array access = 0
-  // CHECK-NEXT:   {{.*}}  # 0: count = 2048
-  // CHECK-NEXT:   {{.*}}  # 1: count = 1
-  // CHECK-NEXT:  Unregister struct.B$2$3$2:      2 fields
-  // CHECK-NEXT:   {{.*}} struct B
-  // CHECK-NEXT:   {{.*}}  size = 16, count = 2097153, ratio = 2097152, array access = 0
-  // CHECK-NEXT:   {{.*}}  # 0: count = 1
-  // CHECK-NEXT:   {{.*}}  # 1: count = 2097152
-  // CHECK-NEXT:  Unregister union.U$1$3:         1 fields
-  // CHECK-NEXT:  Duplicated struct.S$2$11$11:    2 fields
-  // CHECK-NEXT:  Unregister struct.D$3$14$11$11: 3 fields
-  // CHECK-NEXT:  {{.*}} struct D
-  // CHECK-NEXT:  {{.*}}  size = 128, count = 2097153, ratio = 2097153, array access = 0
-  // CHECK-NEXT:  {{.*}}  # 0: count = 1
-  // CHECK-NEXT:  {{.*}}  # 1: count = 0
-  // CHECK-NEXT:  {{.*}}  # 2: count = 2097152
-  // CHECK-NEXT:  Unregister struct.anon$3$11$11$11: 3 fields
-  // CHECK-NEXT:  {{.*}} struct anon
-  // CHECK-NEXT:  {{.*}}  size = 12, count = 2097152, ratio = 4194304, array access = 2097152
-  // CHECK-NEXT:  {{.*}}  # 0: count = 0
-  // CHECK-NEXT:  {{.*}}  # 1: count = 2097152
-  // CHECK-NEXT:  {{.*}}  # 2: count = 0
-  // CHECK-NEXT: {{.*}}EfficiencySanitizer: total struct field access count = 6293518
-}
-#endif // MAIN

compiler-rt/test/esan/TestCases/verbose-simple.c

-// RUN: %clang_esan_frag -O0 %s -o %t 2>&1
-// RUN: %env_esan_opts="verbosity=1 log_exe_name=1" %run %t 2>&1 | FileCheck --check-prefix=%arch --check-prefix=CHECK %s
-
-int main(int argc, char **argv) {
-  // CHECK:      in esan::initializeLibrary
-  // (There can be a re-exec for stack limit here.)
-  // x86_64:      Shadow scale=2 offset=0x440000000000
-  // x86_64-NEXT: Shadow #0: [110000000000-114000000000) (256GB)
-  // x86_64-NEXT: Shadow #1: [124000000000-12c000000000) (512GB)
-  // x86_64-NEXT: Shadow #2: [148000000000-150000000000) (512GB)
-  // mips64:      Shadow scale=2 offset=0x4400000000
-  // mips64-NEXT: Shadow #0: [1140000000-1180000000) (1GB)
-  // mips64-NEXT: Shadow #1: [1380000000-13c0000000) (1GB)
-  // mips64-NEXT: Shadow #2: [14c0000000-1500000000) (1GB)
-  // CHECK: in esan::finalizeLibrary
-  // CHECK: ==verbose-simple{{.*}}EfficiencySanitizer: total struct field access count = 0
-  return 0;
-}

compiler-rt/test/esan/TestCases/workingset-early-fault.c

-// Test shadow faults during esan initialization as well as
-// faults during dlsym's calloc during interceptor init.
-//
-// RUN: %clang_esan_wset %s -o %t
-// RUN: %run %t 2>&1 | FileCheck %s
-// Stucks at init and no clone feature equivalent.
-// UNSUPPORTED: freebsd
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-// Our goal is to emulate an instrumented allocator, whose calloc
-// invoked from dlsym will trigger shadow faults, to test an
-// early shadow fault during esan interceptor init.
-// We do this by replacing calloc:
-void *calloc(size_t size, size_t n) {
-  // Unfortunately we can't print anything to make the test
-  // ensure we got here b/c the sanitizer interceptors can't
-  // handle that during interceptor init.
-
-  // Ensure we trigger a shadow write fault:
-  int x[16];
-  x[0] = size;
-  // Now just emulate calloc.
-  void *res = malloc(size*n);
-  memset(res, 0, size*n);
-  return res;
-}
-
-int main(int argc, char **argv) {
-  printf("all done\n");
-  return 0;
-}
-// CHECK: all done

compiler-rt/test/esan/TestCases/workingset-memset.cpp

-// RUN: %clang_esan_wset -O0 %s -o %t 2>&1
-// RUN: %run %t 2>&1 | FileCheck %s
-// Stucks at init and no clone feature equivalent.
-// UNSUPPORTED: freebsd
-
-#include <stdlib.h>
-#include <string.h>
-#include <sys/mman.h>
-#include <assert.h>
-#include <string.h>
-
-int main(int argc, char **argv) {
-  const int size = 128*1024*1024;
-  char *p = (char *)mmap(0, size, PROT_READ | PROT_WRITE,
-                         MAP_ANON | MAP_PRIVATE, -1, 0);
-  // Test the slowpath at different cache line boundaries.
-  for (int i = 0; i < 630; i++)
-    memset((char *)p + 63*i, i, 63*i);
-  munmap(p, size);
-  return 0;
-  // CHECK: {{.*}} EfficiencySanitizer: the total working set size: 77 KB (12{{[0-9]+}} cache lines)
-}

compiler-rt/test/esan/TestCases/workingset-midreport.cpp

-// RUN: %clang_esan_wset -O0 %s -o %t 2>&1
-// RUN: %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-ESAN
-
-// RUN: %clang -O0 %s -o %t 2>&1
-// RUN: %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-NO-ESAN
-
-// FIXME: Re-enable once PR33590 is fixed.
-// UNSUPPORTED: x86_64
-// Stucks at init and no clone feature equivalent.
-// UNSUPPORTED: freebsd
-
-#include <sanitizer/esan_interface.h>
-#include <sched.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/mman.h>
-
-const int size = 0x1 << 25; // 523288 cache lines
-const int iters = 6;
-
-int main(int argc, char **argv) {
-  char *buf = (char *)mmap(0, size, PROT_READ | PROT_WRITE,
-                           MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
-  // To avoid flakiness stemming from whether the sideline thread
-  // is scheduled enough on a loaded test machine, we coordinate
-  // with esan itself:
-  if (__esan_get_sample_count) {
-    while (__esan_get_sample_count() < 4) {
-      for (int i = 0; i < size; ++i)
-        buf[i] = i;
-      sched_yield();
-    }
-  }
-  // Ensure a non-esan build works without ifdefs:
-  if (__esan_report) {
-    // We should get 2 roughly identical reports:
-    __esan_report();
-  }
-  munmap(buf, size);
-  fprintf(stderr, "all done\n");
-  // CHECK-NO-ESAN:   all done
-  // We only check for a few samples here to reduce the chance of flakiness:
-  // CHECK-ESAN:      =={{[0-9]+}}== Total number of samples: {{[0-9]+}}
-  // CHECK-ESAN-NEXT: =={{[0-9]+}}== Samples array #0 at period 20 ms
-  // CHECK-ESAN-NEXT: =={{[0-9]+}}==#   0: {{[ 0-9]+}} {{KB|MB|Bytes}} ({{[ 0-9]+}} cache lines)
-  // CHECK-ESAN-NEXT: =={{[0-9]+}}==#   1: {{[ 0-9]+}} {{KB|MB|Bytes}} ({{[ 0-9]+}} cache lines)
-  // CHECK-ESAN-NEXT: =={{[0-9]+}}==#   2: {{[ 0-9]+}} {{KB|MB|Bytes}} ({{[ 0-9]+}} cache lines)
-  // CHECK-ESAN-NEXT: =={{[0-9]+}}==#   3: {{[ 0-9]+}} {{KB|MB|Bytes}} ({{[ 0-9]+}} cache lines)
-  // CHECK-ESAN:      =={{[0-9]+}}== Samples array #1 at period 80 ms
-  // CHECK-ESAN-NEXT: =={{[0-9]+}}==#   0: {{[ 0-9]+}} {{KB|MB|Bytes}} ({{[ 0-9]+}} cache lines)
-  // CHECK-ESAN:      =={{[0-9]+}}== Samples array #2 at period 320 ms
-  // CHECK-ESAN:      =={{[0-9]+}}== Samples array #3 at period 1280 ms
-  // CHECK-ESAN:      =={{[0-9]+}}== Samples array #4 at period 5120 ms
-  // CHECK-ESAN:      =={{[0-9]+}}== Samples array #5 at period 20 sec
-  // CHECK-ESAN:      =={{[0-9]+}}== Samples array #6 at period 81 sec
-  // CHECK-ESAN:      =={{[0-9]+}}== Samples array #7 at period 327 sec
-  // CHECK-ESAN: {{.*}} EfficiencySanitizer: the total working set size: 32 MB (5242{{[0-9][0-9]}} cache lines)
-  // CHECK-ESAN-NEXT: all done
-  // CHECK-ESAN-NEXT: =={{[0-9]+}}== Total number of samples: {{[0-9]+}}
-  // CHECK-ESAN-NEXT: =={{[0-9]+}}== Samples array #0 at period 20 ms
-  // CHECK-ESAN-NEXT: =={{[0-9]+}}==#   0: {{[ 0-9]+}} {{KB|MB|Bytes}} ({{[ 0-9]+}} cache lines)
-  // CHECK-ESAN-NEXT: =={{[0-9]+}}==#   1: {{[ 0-9]+}} {{KB|MB|Bytes}} ({{[ 0-9]+}} cache lines)
-  // CHECK-ESAN-NEXT: =={{[0-9]+}}==#   2: {{[ 0-9]+}} {{KB|MB|Bytes}} ({{[ 0-9]+}} cache lines)
-  // CHECK-ESAN-NEXT: =={{[0-9]+}}==#   3: {{[ 0-9]+}} {{KB|MB|Bytes}} ({{[ 0-9]+}} cache lines)
-  // CHECK-ESAN:      =={{[0-9]+}}== Samples array #1 at period 80 ms
-  // CHECK-ESAN-NEXT: =={{[0-9]+}}==#   0: {{[ 0-9]+}} {{KB|MB|Bytes}} ({{[ 0-9]+}} cache lines)
-  // CHECK-ESAN:      =={{[0-9]+}}== Samples array #2 at period 320 ms
-  // CHECK-ESAN:      =={{[0-9]+}}== Samples array #3 at period 1280 ms
-  // CHECK-ESAN:      =={{[0-9]+}}== Samples array #4 at period 5120 ms
-  // CHECK-ESAN:      =={{[0-9]+}}== Samples array #5 at period 20 sec
-  // CHECK-ESAN:      =={{[0-9]+}}== Samples array #6 at period 81 sec
-  // CHECK-ESAN:      =={{[0-9]+}}== Samples array #7 at period 327 sec
-  // CHECK-ESAN: {{.*}} EfficiencySanitizer: the total working set size: 32 MB (5242{{[0-9][0-9]}} cache lines)
-  return 0;
-}

compiler-rt/test/esan/TestCases/workingset-samples.cpp

-// RUN: %clang_esan_wset -O0 %s -o %t 2>&1
-// RUN: %run %t 2>&1 | FileCheck %s
-
-// FIXME: Re-enable once PR33590 is fixed.
-// UNSUPPORTED: x86_64
-// Stucks at init and no clone feature equivalent.
-// UNSUPPORTED: freebsd
-
-#include <sanitizer/esan_interface.h>
-#include <sched.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/mman.h>
-
-const int size = 0x1 << 25; // 523288 cache lines
-
-int main(int argc, char **argv) {
-  char *buf = (char *)mmap(0, size, PROT_READ | PROT_WRITE,
-                           MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
-  // To avoid flakiness stemming from whether the sideline thread
-  // is scheduled enough on a loaded test machine, we coordinate
-  // with esan itself:
-  if (__esan_get_sample_count) {
-    while (__esan_get_sample_count() < 4) {
-      for (int i = 0; i < size; ++i)
-        buf[i] = i;
-      sched_yield();
-    }
-  }
-  munmap(buf, size);
-  // We only check for a few samples here to reduce the chance of flakiness.
-  // CHECK:      =={{[0-9]+}}== Total number of samples: {{[0-9]+}}
-  // CHECK-NEXT: =={{[0-9]+}}== Samples array #0 at period 20 ms
-  // CHECK-NEXT: =={{[0-9]+}}==#   0: {{[ 0-9]+}} {{KB|MB|Bytes}} ({{[ 0-9]+}} cache lines)
-  // CHECK-NEXT: =={{[0-9]+}}==#   1: {{[ 0-9]+}} {{KB|MB|Bytes}} ({{[ 0-9]+}} cache lines)
-  // CHECK-NEXT: =={{[0-9]+}}==#   2: {{[ 0-9]+}} {{KB|MB|Bytes}} ({{[ 0-9]+}} cache lines)
-  // CHECK-NEXT: =={{[0-9]+}}==#   3: {{[ 0-9]+}} {{KB|MB|Bytes}} ({{[ 0-9]+}} cache lines)
-  // CHECK:      =={{[0-9]+}}== Samples array #1 at period 80 ms
-  // CHECK-NEXT: =={{[0-9]+}}==#   0: {{[ 0-9]+}} {{KB|MB|Bytes}} ({{[ 0-9]+}} cache lines)
-  // CHECK:      =={{[0-9]+}}== Samples array #2 at period 320 ms
-  // CHECK:      =={{[0-9]+}}== Samples array #3 at period 1280 ms
-  // CHECK:      =={{[0-9]+}}== Samples array #4 at period 5120 ms
-  // CHECK:      =={{[0-9]+}}== Samples array #5 at period 20 sec
-  // CHECK:      =={{[0-9]+}}== Samples array #6 at period 81 sec
-  // CHECK:      =={{[0-9]+}}== Samples array #7 at period 327 sec
-  // CHECK: {{.*}} EfficiencySanitizer: the total working set size: 32 MB (5242{{[0-9][0-9]}} cache lines)
-  return 0;
-}

compiler-rt/test/esan/TestCases/workingset-signal-posix.cpp

-// RUN: %clang_esan_wset -O0 %s -o %t 2>&1
-// RUN: %run %t 2>&1 | FileCheck %s
-// Stucks at init and no clone feature equivalent.
-// UNSUPPORTED: freebsd
-
-#include <assert.h>
-#include <setjmp.h>
-#include <signal.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <sys/mman.h>
-
-sigjmp_buf mark;
-
-static void SignalHandler(int Sig) {
-  if (Sig == SIGSEGV) {
-    fprintf(stderr, "Handling SIGSEGV for signal\n");
-    siglongjmp(mark, 1);
-  }
-  exit(1);
-}
-
-static void SigactionHandler(int Sig, siginfo_t *Info, void *Ctx) {
-  if (Sig == SIGSEGV) {
-    fprintf(stderr, "Handling SIGSEGV for sigaction\n");
-    siglongjmp(mark, 1);
-  }
-  exit(1);
-}
-
-int main(int argc, char **argv) {
-  __sighandler_t Prior = signal(SIGSEGV, SignalHandler);
-  assert(Prior == SIG_DFL);
-  if (sigsetjmp(mark, 1) == 0)
-    *((volatile int *)(ssize_t)argc) = 42; // Raise SIGSEGV
-  fprintf(stderr, "Past longjmp for signal\n");
-
-  Prior = signal(SIGSEGV, SIG_DFL);
-  assert(Prior == SignalHandler);
-
-  struct sigaction SigAct;
-  SigAct.sa_sigaction = SigactionHandler;
-  int Res = sigfillset(&SigAct.sa_mask);
-  assert(Res == 0);
-  SigAct.sa_flags = SA_SIGINFO;
-  Res = sigaction(SIGSEGV, &SigAct, NULL);
-  assert(Res == 0);
-
-  if (sigsetjmp(mark, 1) == 0)
-    *((volatile int *)(ssize_t)argc) = 42; // Raise SIGSEGV
-  fprintf(stderr, "Past longjmp for sigaction\n");
-
-  Res = sigaction(SIGSEGV, NULL, &SigAct);
-  assert(Res == 0);
-  assert(SigAct.sa_sigaction == SigactionHandler);
-
-  // Test blocking SIGSEGV and raising a shadow fault.
-  sigset_t Set;
-  sigemptyset(&Set);
-  sigaddset(&Set, SIGSEGV);
-  Res = sigprocmask(SIG_BLOCK, &Set, NULL);
-  // Make a large enough mapping that its start point will be before any
-  // prior library-region shadow access.
-  char *buf = (char *)mmap(0, 640*1024, PROT_READ | PROT_WRITE,
-                           MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
-  buf[0] = 4;
-  munmap(buf, 640*1024);
-  fprintf(stderr, "Past blocked-SIGSEGV shadow fault\n");
-
-  return 0;
-}
-// CHECK:      Handling SIGSEGV for signal
-// CHECK-NEXT: Past longjmp for signal
-// CHECK-NEXT: Handling SIGSEGV for sigaction
-// CHECK-NEXT: Past longjmp for sigaction
-// CHECK-NEXT: Past blocked-SIGSEGV shadow fault
-// CHECK:      {{.*}} EfficiencySanitizer: the total working set size: {{[0-9]+}} Bytes ({{[0-9][0-9]}} cache lines)

compiler-rt/test/esan/TestCases/workingset-simple.cpp

-// RUN: %clang_esan_wset -O0 %s -o %t 2>&1
-// RUN: %run %t 2>&1 | FileCheck %s
-
-// FIXME: Re-enable once PR33590 is fixed.
-// UNSUPPORTED: x86_64
-// Stucks at init and no clone feature equivalent.
-// UNSUPPORTED: freebsd
-
-#include <stdlib.h>
-#include <string.h>
-#include <sys/mman.h>
-#include <assert.h>
-
-const int size = 0x1 << 25; // 523288 cache lines
-const int line_size = 64;
-
-int main(int argc, char **argv) {
-  char *bufA = (char *)malloc(sizeof(char) * line_size);
-  char bufB[64];
-  char *bufC = (char *)mmap(0, size, PROT_READ | PROT_WRITE,
-                            MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
-  bufA[0] = 0;
-  // This additional access to the same line should not increase the line
-  // count: but it's difficult to make a non-flaky test that measures the
-  // lines down to the ones digit so right now we're not really testing that.
-  // If we add a heap-only mode we may be able to be more precise.
-  bufA[1] = 0;
-  bufB[33] = 1;
-  for (int i = 0; i < size; i += line_size)
-    bufC[i] = 0;
-  free(bufA);
-  munmap(bufC, 0x4000);
-  // CHECK: {{.*}} EfficiencySanitizer: the total working set size: 32 MB (524{{[0-9][0-9][0-9]}} cache lines)
-  return 0;
-}

compiler-rt/test/esan/Unit/circular_buffer.cpp

-// RUN: %clangxx_unit -O0 %s -o %t 2>&1
-// RUN: %env_esan_opts="record_snapshots=0" %run %t 2>&1 | FileCheck %s
-
-#include "esan/esan_circular_buffer.h"
-#include "sanitizer_common/sanitizer_placement_new.h"
-#include <assert.h>
-#include <stdio.h>
-
-static const int TestBufCapacity = 4;
-
-// The buffer should have a capacity of TestBufCapacity.
-void testBuffer(__esan::CircularBuffer<int> *Buf) {
-  assert(Buf->size() == 0);
-  assert(Buf->empty());
-
-  Buf->push_back(1);
-  assert(Buf->back() == 1);
-  assert((*Buf)[0] == 1);
-  assert(Buf->size() == 1);
-  assert(!Buf->empty());
-
-  Buf->push_back(2);
-  Buf->push_back(3);
-  Buf->push_back(4);
-  Buf->push_back(5);
-  assert((*Buf)[0] == 2);
-  assert(Buf->size() == 4);
-
-  Buf->pop_back();
-  assert((*Buf)[0] == 2);
-  assert(Buf->size() == 3);
-
-  Buf->pop_back();
-  Buf->pop_back();
-  assert((*Buf)[0] == 2);
-  assert(Buf->size() == 1);
-  assert(!Buf->empty());
-
-  Buf->pop_back();
-  assert(Buf->empty());
-}
-
-int main()
-{
-  // Test initialize/free.
-  __esan::CircularBuffer<int> GlobalBuf;
-  GlobalBuf.initialize(TestBufCapacity);
-  testBuffer(&GlobalBuf);
-  GlobalBuf.free();
-
-  // Test constructor/free.
-  __esan::CircularBuffer<int> *LocalBuf;
-  static char placeholder[sizeof(*LocalBuf)];
-  LocalBuf = new(placeholder) __esan::CircularBuffer<int>(TestBufCapacity);
-  testBuffer(LocalBuf);
-  LocalBuf->free();
-
-  fprintf(stderr, "All checks passed.\n");
-  // CHECK: All checks passed.
-  return 0;
-}

compiler-rt/test/esan/Unit/hashtable.cpp

-// RUN: %clangxx_unit -esan-instrument-loads-and-stores=0 -O0 %s -o %t 2>&1
-// RUN: %env_esan_opts="record_snapshots=0" %run %t 2>&1 | FileCheck %s
-
-#include "esan/esan_hashtable.h"
-#include <assert.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-class MyData {
- public:
-  MyData(const char *Str) : RefCount(0) { Buf = strdup(Str); }
-  ~MyData() {
-    fprintf(stderr, "  Destructor: %s.\n", Buf);
-    free(Buf);
-  }
-  bool operator==(MyData &Cmp) { return strcmp(Buf, Cmp.Buf) == 0; }
-  operator size_t() const {
-    size_t Res = 0;
-    for (int i = 0; i < strlen(Buf); ++i)
-      Res ^= Buf[i];
-    return Res;
-  }
-  char *Buf;
-  int RefCount;
-};
-
-// We use a smart pointer wrapper to free the payload on hashtable removal.
-struct MyDataPayload {
-  MyDataPayload() : Data(nullptr) {}
-  explicit MyDataPayload(MyData *Data) : Data(Data) { ++Data->RefCount; }
-  ~MyDataPayload() {
-    if (Data && --Data->RefCount == 0) {
-      fprintf(stderr, "Deleting %s.\n", Data->Buf);
-      delete Data;
-    }
-  }
-  MyDataPayload(const MyDataPayload &Copy) {
-    Data = Copy.Data;
-    ++Data->RefCount;
-  }
-  MyDataPayload & operator=(const MyDataPayload &Copy) {
-    if (this != &Copy) {
-      this->~MyDataPayload();
-      Data = Copy.Data;
-      ++Data->RefCount;
-    }
-    return *this;
-  }
-  bool operator==(MyDataPayload &Cmp) { return *Data == *Cmp.Data; }
-  operator size_t() const { return (size_t)*Data; }
-  MyData *Data;
-};
-
-int main()
-{
-  __esan::HashTable<int, int> IntTable;
-  assert(IntTable.size() == 0);
-
-  // Test iteration on an empty table.
-  int Count = 0;
-  for (auto Iter = IntTable.begin(); Iter != IntTable.end();
-       ++Iter, ++Count) {
-    // Empty.
-  }
-  assert(Count == 0);
-
-  bool Added = IntTable.add(4, 42);
-  assert(Added);
-  assert(!IntTable.add(4, 42));
-  assert(IntTable.size() == 1);
-  int Value;
-  bool Found = IntTable.lookup(4, Value);
-  assert(Found && Value == 42);
-
-  // Test iterator.
-  IntTable.lock();
-  for (auto Iter = IntTable.begin(); Iter != IntTable.end();
-       ++Iter, ++Count) {
-    assert((*Iter).Key == 4);
-    assert((*Iter).Data == 42);
-  }
-  IntTable.unlock();
-  assert(Count == 1);
-  assert(Count == IntTable.size());
-  assert(!IntTable.remove(5));
-  assert(IntTable.remove(4));
-
-  // Test a more complex payload.
-  __esan::HashTable<int, MyDataPayload> DataTable(4);
-  MyDataPayload NewData(new MyData("mystring"));
-  Added = DataTable.add(4, NewData);
-  assert(Added);
-  MyDataPayload FoundData;
-  Found = DataTable.lookup(4, FoundData);
-  assert(Found && strcmp(FoundData.Data->Buf, "mystring") == 0);
-  assert(!DataTable.remove(5));
-  assert(DataTable.remove(4));
-  // Test resize.
-  for (int i = 0; i < 4; ++i) {
-    MyDataPayload MoreData(new MyData("delete-at-end"));
-    Added = DataTable.add(i+1, MoreData);
-    assert(Added);
-    assert(!DataTable.add(i+1, MoreData));
-  }
-  for (int i = 0; i < 4; ++i) {
-    Found = DataTable.lookup(i+1, FoundData);
-    assert(Found && strcmp(FoundData.Data->Buf, "delete-at-end") == 0);
-  }
-  DataTable.lock();
-  Count = 0;
-  for (auto Iter = DataTable.begin(); Iter != DataTable.end();
-       ++Iter, ++Count) {
-    int Key = (*Iter).Key;
-    FoundData = (*Iter).Data;
-    assert(Key >= 1 && Key <= 4);
-    assert(strcmp(FoundData.Data->Buf, "delete-at-end") == 0);
-  }
-  DataTable.unlock();
-  assert(Count == 4);
-  assert(Count == DataTable.size());
-
-  // Ensure the iterator supports a range-based for loop.
-  DataTable.lock();
-  Count = 0;
-  for (auto Pair : DataTable) {
-    assert(Pair.Key >= 1 && Pair.Key <= 4);
-    assert(strcmp(Pair.Data.Data->Buf, "delete-at-end") == 0);
-    ++Count;
-  }
-  DataTable.unlock();
-  assert(Count == 4);
-  assert(Count == DataTable.size());
-
-  // Test payload freeing via smart pointer wrapper.
-  __esan::HashTable<MyDataPayload, MyDataPayload, true> DataKeyTable;
-  MyDataPayload DataA(new MyData("string AB"));
-  DataKeyTable.lock();
-  Added = DataKeyTable.add(DataA, DataA);
-  assert(Added);
-  Found = DataKeyTable.lookup(DataA, FoundData);
-  assert(Found && strcmp(FoundData.Data->Buf, "string AB") == 0);
-  MyDataPayload DataB(new MyData("string AB"));
-  Added = DataKeyTable.add(DataB, DataB);
-  assert(!Added);
-  DataKeyTable.remove(DataB); // Should free the DataA payload.
-  DataKeyTable.unlock();
-
-  // Test custom functors.
-  struct CustomHash {
-    size_t operator()(int Key) const { return Key % 4; }
-  };
-  struct CustomEqual {
-    bool operator()(int Key1, int Key2) const { return Key1 %4 == Key2 % 4; }
-  };
-  __esan::HashTable<int, int, false, CustomHash, CustomEqual> ModTable;
-  Added = ModTable.add(2, 42);
-  assert(Added);
-  Added = ModTable.add(6, 42);
-  assert(!Added);
-
-  fprintf(stderr, "All checks passed.\n");
-  return 0;
-}
-// CHECK:      Deleting mystring.
-// CHECK-NEXT:   Destructor: mystring.
-// CHECK-NEXT: All checks passed.
-// CHECK-NEXT: Deleting string AB.
-// CHECK-NEXT:   Destructor: string AB.
-// CHECK-NEXT: Deleting string AB.
-// CHECK-NEXT:   Destructor: string AB.
-// CHECK-NEXT: Deleting delete-at-end.
-// CHECK-NEXT:   Destructor: delete-at-end.
-// CHECK-NEXT: Deleting delete-at-end.
-// CHECK-NEXT:   Destructor: delete-at-end.
-// CHECK-NEXT: Deleting delete-at-end.
-// CHECK-NEXT:   Destructor: delete-at-end.
-// CHECK-NEXT: Deleting delete-at-end.
-// CHECK-NEXT:   Destructor: delete-at-end.

compiler-rt/test/esan/lit.cfg

-# -*- Python -*-
-
-import os
-
-# Setup config name.
-config.name = 'EfficiencySanitizer' + config.name_suffix
-
-# Setup source root.
-config.test_source_root = os.path.dirname(__file__)
-
-# Setup default compiler flags used with -fsanitize=efficiency option.
-base_cflags = ([config.target_cflags] + config.debug_info_flags)
-base_cxxflags = config.cxx_mode_flags + base_cflags
-
-frag_cflags = (["-fsanitize=efficiency-cache-frag"] + base_cflags)
-wset_cflags = (["-fsanitize=efficiency-working-set"] + base_cflags)
-esan_incdir = config.test_source_root + "/../../lib"
-unit_cxxflags = (["-I%s" % esan_incdir, "-std=c++11",
-                  # We need to link with the esan runtime.
-                  # Tests should pass %env_esan_opts="record_snapshots=0".
-                  "-fsanitize=efficiency-working-set"] + base_cxxflags)
-
-def build_invocation(compile_flags):
-  return " " + " ".join([config.clang] + compile_flags) + " "
-
-config.substitutions.append( ("%clang ",
-                              build_invocation(base_cflags)) )
-config.substitutions.append( ("%clang_esan_frag ",
-                              build_invocation(frag_cflags)) )
-config.substitutions.append( ("%clang_esan_wset ",
-                              build_invocation(wset_cflags)) )
-config.substitutions.append( ("%clangxx_unit",
-                              build_invocation(unit_cxxflags)) )
-
-default_esan_opts = ''
-config.substitutions.append(('%env_esan_opts=',
-                             'env ESAN_OPTIONS=' + default_esan_opts))
-
-# Default test suffixes.
-config.suffixes = ['.c', '.cpp']
-
-if config.host_os not in ['Linux', 'FreeBSD'] or config.target_arch not in ['x86_64', 'mips64'] :
-  config.unsupported = True

compiler-rt/test/esan/lit.site.cfg.in

-## Autogenerated by LLVM/Clang configuration.
-# Do not edit!
-
-# Tool-specific config options.
-config.name_suffix = "@ESAN_TEST_CONFIG_SUFFIX@"
-config.esan_lit_source_dir = "@ESAN_LIT_SOURCE_DIR@"
-config.target_cflags = "@ESAN_TEST_TARGET_CFLAGS@"
-config.target_arch = "@ESAN_TEST_TARGET_ARCH@"
-
-# Load common config for all compiler-rt lit tests.
-lit_config.load_config(config, "@COMPILER_RT_BINARY_DIR@/test/lit.common.configured")
-
-# Load tool-specific config that would do the real work.
-lit_config.load_config(config, "@ESAN_LIT_SOURCE_DIR@/lit.cfg")

llvm/include/llvm/InitializePasses.h

 void initializeDominatorTreeWrapperPassPass(PassRegistry&);
 void initializeDwarfEHPreparePass(PassRegistry&);
 void initializeEarlyCSELegacyPassPass(PassRegistry&);
 void initializeEarlyCSEMemSSALegacyPassPass(PassRegistry&);
 void initializeEarlyIfConverterPass(PassRegistry&);
 void initializeEarlyMachineLICMPass(PassRegistry&);
 void initializeEarlyTailDuplicatePass(PassRegistry&);
 void initializeEdgeBundlesPass(PassRegistry&);
-void initializeEfficiencySanitizerPass(PassRegistry&);
 void initializeEliminateAvailableExternallyLegacyPassPass(PassRegistry&);
 void initializeEntryExitInstrumenterPass(PassRegistry&);
 void initializeExpandISelPseudosPass(PassRegistry&);
 void initializeExpandMemCmpPassPass(PassRegistry&);
 void initializeExpandPostRAPass(PassRegistry&);
 void initializeExpandReductionsPass(PassRegistry&);
 void initializeMakeGuardsExplicitLegacyPassPass(PassRegistry&);
 void initializeExternalAAWrapperPassPass(PassRegistry&);

llvm/include/llvm/Transforms/Instrumentation.h

 FunctionPass *createHWAddressSanitizerPass(bool CompileKernel = false,
                                            bool Recover = false);
 
 // Insert DataFlowSanitizer (dynamic data flow analysis) instrumentation
 ModulePass *createDataFlowSanitizerPass(
     const std::vector<std::string> &ABIListFiles = std::vector<std::string>(),
     void *(*getArgTLS)() = nullptr, void *(*getRetValTLS)() = nullptr);
 
-// Options for EfficiencySanitizer sub-tools.
-struct EfficiencySanitizerOptions {
-  enum Type {
-    ESAN_None = 0,
-    ESAN_CacheFrag,
-    ESAN_WorkingSet,
-  } ToolType = ESAN_None;
-
-  EfficiencySanitizerOptions() = default;
-};
-
-// Insert EfficiencySanitizer instrumentation.
-ModulePass *createEfficiencySanitizerPass(
-    const EfficiencySanitizerOptions &Options = EfficiencySanitizerOptions());
-
 // Options for sanitizer coverage instrumentation.
 struct SanitizerCoverageOptions {
   enum Type {
     SCK_None = 0,
     SCK_Function,
     SCK_BB,
     SCK_Edge
   } CoverageType = SCK_None;

llvm/lib/Transforms/Instrumentation/CMakeLists.txt

 add_llvm_library(LLVMInstrumentation
   AddressSanitizer.cpp
   BoundsChecking.cpp
   CGProfile.cpp
   ControlHeightReduction.cpp
   DataFlowSanitizer.cpp
   GCOVProfiling.cpp
   MemorySanitizer.cpp
   IndirectCallPromotion.cpp
   Instrumentation.cpp
   InstrOrderFile.cpp
   InstrProfiling.cpp
   PGOInstrumentation.cpp
   PGOMemOPSizeOpt.cpp
   SanitizerCoverage.cpp
   ThreadSanitizer.cpp
-  EfficiencySanitizer.cpp
   HWAddressSanitizer.cpp
 
   ADDITIONAL_HEADER_DIRS
   ${LLVM_MAIN_INCLUDE_DIR}/llvm/Transforms
 
   DEPENDS
   intrinsics_gen
   )

llvm/lib/Transforms/Instrumentation/EfficiencySanitizer.cpp

-//===-- EfficiencySanitizer.cpp - performance tuner -----------------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-//
-// This file is a part of EfficiencySanitizer, a family of performance tuners
-// that detects multiple performance issues via separate sub-tools.
-//
-// The instrumentation phase is straightforward:
-//   - Take action on every memory access: either inlined instrumentation,
-//     or Inserted calls to our run-time library.
-//   - Optimizations may apply to avoid instrumenting some of the accesses.
-//   - Turn mem{set,cpy,move} instrinsics into library calls.
-// The rest is handled by the run-time library.
-//===----------------------------------------------------------------------===//
-
-#include "llvm/ADT/SmallString.h"
-#include "llvm/ADT/SmallVector.h"
-#include "llvm/ADT/Statistic.h"
-#include "llvm/ADT/StringExtras.h"
-#include "llvm/Analysis/TargetLibraryInfo.h"
-#include "llvm/Transforms/Utils/Local.h"
-#include "llvm/IR/Function.h"
-#include "llvm/IR/IRBuilder.h"
-#include "llvm/IR/IntrinsicInst.h"
-#include "llvm/IR/Module.h"
-#include "llvm/IR/Type.h"
-#include "llvm/Support/CommandLine.h"
-#include "llvm/Support/Debug.h"
-#include "llvm/Support/raw_ostream.h"
-#include "llvm/Transforms/Instrumentation.h"
-#include "llvm/Transforms/Utils/BasicBlockUtils.h"
-#include "llvm/Transforms/Utils/ModuleUtils.h"
-
-using namespace llvm;
-
-#define DEBUG_TYPE "esan"
-
-// The tool type must be just one of these ClTool* options, as the tools
-// cannot be combined due to shadow memory constraints.
-static cl::opt<bool>
-    ClToolCacheFrag("esan-cache-frag", cl::init(false),
-                    cl::desc("Detect data cache fragmentation"), cl::Hidden);
-static cl::opt<bool>
-    ClToolWorkingSet("esan-working-set", cl::init(false),
-                    cl::desc("Measure the working set size"), cl::Hidden);
-// Each new tool will get its own opt flag here.
-// These are converted to EfficiencySanitizerOptions for use
-// in the code.
-
-static cl::opt<bool> ClInstrumentLoadsAndStores(
-    "esan-instrument-loads-and-stores", cl::init(true),
-    cl::desc("Instrument loads and stores"), cl::Hidden);
-static cl::opt<bool> ClInstrumentMemIntrinsics(
-    "esan-instrument-memintrinsics", cl::init(true),
-    cl::desc("Instrument memintrinsics (memset/memcpy/memmove)"), cl::Hidden);
-static cl::opt<bool> ClInstrumentFastpath(
-    "esan-instrument-fastpath", cl::init(true),
-    cl::desc("Instrument fastpath"), cl::Hidden);
-static cl::opt<bool> ClAuxFieldInfo(
-    "esan-aux-field-info", cl::init(true),
-    cl::desc("Generate binary with auxiliary struct field information"),
-    cl::Hidden);
-
-// Experiments show that the performance difference can be 2x or more,
-// and accuracy loss is typically negligible, so we turn this on by default.
-static cl::opt<bool> ClAssumeIntraCacheLine(
-    "esan-assume-intra-cache-line", cl::init(true),
-    cl::desc("Assume each memory access touches just one cache line, for "
-             "better performance but with a potential loss of accuracy."),
-    cl::Hidden);
-
-STATISTIC(NumInstrumentedLoads, "Number of instrumented loads");
-STATISTIC(NumInstrumentedStores, "Number of instrumented stores");
-STATISTIC(NumFastpaths, "Number of instrumented fastpaths");
-STATISTIC(NumAccessesWithIrregularSize,
-          "Number of accesses with a size outside our targeted callout sizes");
-STATISTIC(NumIgnoredStructs, "Number of ignored structs");
-STATISTIC(NumIgnoredGEPs, "Number of ignored GEP instructions");
-STATISTIC(NumInstrumentedGEPs, "Number of instrumented GEP instructions");
-STATISTIC(NumAssumedIntraCacheLine,
-          "Number of accesses assumed to be intra-cache-line");
-
-static const uint64_t EsanCtorAndDtorPriority = 0;
-static const char *const EsanModuleCtorName = "esan.module_ctor";
-static const char *const EsanModuleDtorName = "esan.module_dtor";
-static const char *const EsanInitName = "__esan_init";
-static const char *const EsanExitName = "__esan_exit";
-
-// We need to specify the tool to the runtime earlier than
-// the ctor is called in some cases, so we set a global variable.
-static const char *const EsanWhichToolName = "__esan_which_tool";
-
-// We must keep these Shadow* constants consistent with the esan runtime.
-// FIXME: Try to place these shadow constants, the names of the __esan_*
-// interface functions, and the ToolType enum into a header shared between
-// llvm and compiler-rt.
-struct ShadowMemoryParams {
-  uint64_t ShadowMask;
-  uint64_t ShadowOffs[3];
-};
-
-static const ShadowMemoryParams ShadowParams47 = {
-    0x00000fffffffffffull,
-    {
-        0x0000130000000000ull, 0x0000220000000000ull, 0x0000440000000000ull,
-    }};
-
-static const ShadowMemoryParams ShadowParams40 = {
-    0x0fffffffffull,
-    {
-        0x1300000000ull, 0x2200000000ull, 0x4400000000ull,
-    }};
-
-// This array is indexed by the ToolType enum.
-static const int ShadowScale[] = {
-  0, // ESAN_None.
-  2, // ESAN_CacheFrag: 4B:1B, so 4 to 1 == >>2.
-  6, // ESAN_WorkingSet: 64B:1B, so 64 to 1 == >>6.
-};
-
-// MaxStructCounterNameSize is a soft size limit to avoid insanely long
-// names for those extremely large structs.
-static const unsigned MaxStructCounterNameSize = 512;
-
-namespace {
-
-static EfficiencySanitizerOptions
-OverrideOptionsFromCL(EfficiencySanitizerOptions Options) {
-  if (ClToolCacheFrag)
-    Options.ToolType = EfficiencySanitizerOptions::ESAN_CacheFrag;
-  else if (ClToolWorkingSet)
-    Options.ToolType = EfficiencySanitizerOptions::ESAN_WorkingSet;
-
-  // Direct opt invocation with no params will have the default ESAN_None.
-  // We run the default tool in that case.
-  if (Options.ToolType == EfficiencySanitizerOptions::ESAN_None)
-    Options.ToolType = EfficiencySanitizerOptions::ESAN_CacheFrag;
-
-  return Options;
-}
-
-/// EfficiencySanitizer: instrument each module to find performance issues.
-class EfficiencySanitizer : public ModulePass {
-public:
-  EfficiencySanitizer(
-      const EfficiencySanitizerOptions &Opts = EfficiencySanitizerOptions())
-      : ModulePass(ID), Options(OverrideOptionsFromCL(Opts)) {}
-  StringRef getPassName() const override;
-  void getAnalysisUsage(AnalysisUsage &AU) const override;
-  bool runOnModule(Module &M) override;
-  static char ID;
-
-private:
-  bool initOnModule(Module &M);
-  void initializeCallbacks(Module &M);
-  bool shouldIgnoreStructType(StructType *StructTy);
-  void createStructCounterName(
-      StructType *StructTy, SmallString<MaxStructCounterNameSize> &NameStr);
-  void createCacheFragAuxGV(
-    Module &M, const DataLayout &DL, StructType *StructTy,
-    GlobalVariable *&TypeNames, GlobalVariable *&Offsets, GlobalVariable *&Size);
-  GlobalVariable *createCacheFragInfoGV(Module &M, const DataLayout &DL,
-                                        Constant *UnitName);
-  Constant *createEsanInitToolInfoArg(Module &M, const DataLayout &DL);
-  void createDestructor(Module &M, Constant *ToolInfoArg);
-  bool runOnFunction(Function &F, Module &M);
-  bool instrumentLoadOrStore(Instruction *I, const DataLayout &DL);
-  bool instrumentMemIntrinsic(MemIntrinsic *MI);
-  bool instrumentGetElementPtr(Instruction *I, Module &M);
-  bool insertCounterUpdate(Instruction *I, StructType *StructTy,
-                           unsigned CounterIdx);
-  unsigned getFieldCounterIdx(StructType *StructTy) {
-    return 0;
-  }
-  unsigned getArrayCounterIdx(StructType *StructTy) {
-    return StructTy->getNumElements();
-  }
-  unsigned getStructCounterSize(StructType *StructTy) {
-    // The struct counter array includes:
-    // - one counter for each struct field,
-    // - one counter for the struct access within an array.
-    return (StructTy->getNumElements()/*field*/ + 1/*array*/);
-  }
-  bool shouldIgnoreMemoryAccess(Instruction *I);
-  int getMemoryAccessFuncIndex(Value *Addr, const DataLayout &DL);
-  Value *appToShadow(Value *Shadow, IRBuilder<> &IRB);
-  bool instrumentFastpath(Instruction *I, const DataLayout &DL, bool IsStore,
-                          Value *Addr, unsigned Alignment);
-  // Each tool has its own fastpath routine:
-  bool instrumentFastpathCacheFrag(Instruction *I, const DataLayout &DL,
-                                   Value *Addr, unsigned Alignment);
-  bool instrumentFastpathWorkingSet(Instruction *I, const DataLayout &DL,
-                                    Value *Addr, unsigned Alignment);
-
-  EfficiencySanitizerOptions Options;
-  LLVMContext *Ctx;
-  Type *IntptrTy;
-  // Our slowpath involves callouts to the runtime library.
-  // Access sizes are powers of two: 1, 2, 4, 8, 16.
-  static const size_t NumberOfAccessSizes = 5;
-  FunctionCallee EsanAlignedLoad[NumberOfAccessSizes];
-  FunctionCallee EsanAlignedStore[NumberOfAccessSizes];
-  FunctionCallee EsanUnalignedLoad[NumberOfAccessSizes];
-  FunctionCallee EsanUnalignedStore[NumberOfAccessSizes];
-  // For irregular sizes of any alignment:
-  FunctionCallee EsanUnalignedLoadN, EsanUnalignedStoreN;
-  FunctionCallee MemmoveFn, MemcpyFn, MemsetFn;
-  Function *EsanCtorFunction;
-  Function *EsanDtorFunction;
-  // Remember the counter variable for each struct type to avoid
-  // recomputing the variable name later during instrumentation.
-  std::map<Type *, GlobalVariable *> StructTyMap;
-  ShadowMemoryParams ShadowParams;
-};
-} // namespace
-
-char EfficiencySanitizer::ID = 0;
-INITIALIZE_PASS_BEGIN(
-    EfficiencySanitizer, "esan",
-    "EfficiencySanitizer: finds performance issues.", false, false)
-INITIALIZE_PASS_DEPENDENCY(TargetLibraryInfoWrapperPass)
-INITIALIZE_PASS_END(
-    EfficiencySanitizer, "esan",
-    "EfficiencySanitizer: finds performance issues.", false, false)
-
-StringRef EfficiencySanitizer::getPassName() const {
-  return "EfficiencySanitizer";
-}
-
-void EfficiencySanitizer::getAnalysisUsage(AnalysisUsage &AU) const {
-  AU.addRequired<TargetLibraryInfoWrapperPass>();
-}
-
-ModulePass *
-llvm::createEfficiencySanitizerPass(const EfficiencySanitizerOptions &Options) {
-  return new EfficiencySanitizer(Options);
-}
-
-void EfficiencySanitizer::initializeCallbacks(Module &M) {
-  IRBuilder<> IRB(M.getContext());
-  // Initialize the callbacks.
-  for (size_t Idx = 0; Idx < NumberOfAccessSizes; ++Idx) {
-    const unsigned ByteSize = 1U << Idx;
-    std::string ByteSizeStr = utostr(ByteSize);
-    // We'll inline the most common (i.e., aligned and frequent sizes)
-    // load + store instrumentation: these callouts are for the slowpath.
-    SmallString<32> AlignedLoadName("__esan_aligned_load" + ByteSizeStr);
-    EsanAlignedLoad[Idx] = M.getOrInsertFunction(
-        AlignedLoadName, IRB.getVoidTy(), IRB.getInt8PtrTy());
-    SmallString<32> AlignedStoreName("__esan_aligned_store" + ByteSizeStr);
-    EsanAlignedStore[Idx] = M.getOrInsertFunction(
-        AlignedStoreName, IRB.getVoidTy(), IRB.getInt8PtrTy());
-    SmallString<32> UnalignedLoadName("__esan_unaligned_load" + ByteSizeStr);
-    EsanUnalignedLoad[Idx] = M.getOrInsertFunction(
-        UnalignedLoadName, IRB.getVoidTy(), IRB.getInt8PtrTy());
-    SmallString<32> UnalignedStoreName("__esan_unaligned_store" + ByteSizeStr);
-    EsanUnalignedStore[Idx] = M.getOrInsertFunction(
-        UnalignedStoreName, IRB.getVoidTy(), IRB.getInt8PtrTy());
-  }
-  EsanUnalignedLoadN = M.getOrInsertFunction(
-      "__esan_unaligned_loadN", IRB.getVoidTy(), IRB.getInt8PtrTy(), IntptrTy);
-  EsanUnalignedStoreN = M.getOrInsertFunction(
-      "__esan_unaligned_storeN", IRB.getVoidTy(), IRB.getInt8PtrTy(), IntptrTy);
-  MemmoveFn =
-      M.getOrInsertFunction("memmove", IRB.getInt8PtrTy(), IRB.getInt8PtrTy(),
-                            IRB.getInt8PtrTy(), IntptrTy);
-  MemcpyFn =
-      M.getOrInsertFunction("memcpy", IRB.getInt8PtrTy(), IRB.getInt8PtrTy(),
-                            IRB.getInt8PtrTy(), IntptrTy);
-  MemsetFn =
-      M.getOrInsertFunction("memset", IRB.getInt8PtrTy(), IRB.getInt8PtrTy(),
-                            IRB.getInt32Ty(), IntptrTy);
-}
-
-bool EfficiencySanitizer::shouldIgnoreStructType(StructType *StructTy) {
-  if (StructTy == nullptr || StructTy->isOpaque() /* no struct body */)
-    return true;
-  return false;
-}
-
-void EfficiencySanitizer::createStructCounterName(
-    StructType *StructTy, SmallString<MaxStructCounterNameSize> &NameStr) {
-  // Append NumFields and field type ids to avoid struct conflicts
-  // with the same name but different fields.
-  if (StructTy->hasName())
-    NameStr += StructTy->getName();
-  else
-    NameStr += "struct.anon";
-  // We allow the actual size of the StructCounterName to be larger than
-  // MaxStructCounterNameSize and append $NumFields and at least one
-  // field type id.
-  // Append $NumFields.
-  NameStr += "$";
-  Twine(StructTy->getNumElements()).toVector(NameStr);
-  // Append struct field type ids in the reverse order.
-  for (int i = StructTy->getNumElements() - 1; i >= 0; --i) {
-    NameStr += "$";
-    Twine(StructTy->getElementType(i)->getTypeID()).toVector(NameStr);
-    if (NameStr.size() >= MaxStructCounterNameSize)
-      break;
-  }
-  if (StructTy->isLiteral()) {
-    // End with $ for literal struct.
-    NameStr += "$";
-  }
-}
-
-// Create global variables with auxiliary information (e.g., struct field size,
-// offset, and type name) for better user report.
-void EfficiencySanitizer::createCacheFragAuxGV(
-    Module &M, const DataLayout &DL, StructType *StructTy,
-    GlobalVariable *&TypeName, GlobalVariable *&Offset,
-    GlobalVariable *&Size) {
-  auto *Int8PtrTy = Type::getInt8PtrTy(*Ctx);
-  auto *Int32Ty = Type::getInt32Ty(*Ctx);
-  // FieldTypeName.
-  auto *TypeNameArrayTy = ArrayType::get(Int8PtrTy, StructTy->getNumElements());
-  TypeName = new GlobalVariable(M, TypeNameArrayTy, true,
-                                 GlobalVariable::InternalLinkage, nullptr);
-  SmallVector<Constant *, 16> TypeNameVec;
-  // FieldOffset.
-  auto *OffsetArrayTy = ArrayType::get(Int32Ty, StructTy->getNumElements());
-  Offset = new GlobalVariable(M, OffsetArrayTy, true,
-                              GlobalVariable::InternalLinkage, nullptr);
-  SmallVector<Constant *, 16> OffsetVec;
-  // FieldSize
-  auto *SizeArrayTy = ArrayType::get(Int32Ty, StructTy->getNumElements());
-  Size = new GlobalVariable(M, SizeArrayTy, true,
-                            GlobalVariable::InternalLinkage, nullptr);
-  SmallVector<Constant *, 16> SizeVec;
-  for (unsigned i = 0; i < StructTy->getNumElements(); ++i) {
-    Type *Ty = StructTy->getElementType(i);
-    std::string Str;
-    raw_string_ostream StrOS(Str);
-    Ty->print(StrOS);
-    TypeNameVec.push_back(
-        ConstantExpr::getPointerCast(
-            createPrivateGlobalForString(M, StrOS.str(), true),
-            Int8PtrTy));
-    OffsetVec.push_back(
-        ConstantInt::get(Int32Ty,
-                         DL.getStructLayout(StructTy)->getElementOffset(i)));
-    SizeVec.push_back(ConstantInt::get(Int32Ty,
-                                       DL.getTypeAllocSize(Ty)));
-    }
-  TypeName->setInitializer(ConstantArray::get(TypeNameArrayTy, TypeNameVec));
-  Offset->setInitializer(ConstantArray::get(OffsetArrayTy, OffsetVec));
-  Size->setInitializer(ConstantArray::get(SizeArrayTy, SizeVec));
-}
-
-// Create the global variable for the cache-fragmentation tool.
-GlobalVariable *EfficiencySanitizer::createCacheFragInfoGV(
-    Module &M, const DataLayout &DL, Constant *UnitName) {
-  assert(Options.ToolType == EfficiencySanitizerOptions::ESAN_CacheFrag);
-
-  auto *Int8PtrTy = Type::getInt8PtrTy(*Ctx);
-  auto *Int8PtrPtrTy = Int8PtrTy->getPointerTo();
-  auto *Int32Ty = Type::getInt32Ty(*Ctx);
-  auto *Int32PtrTy = Type::getInt32PtrTy(*Ctx);
-  auto *Int64Ty = Type::getInt64Ty(*Ctx);
-  auto *Int64PtrTy = Type::getInt64PtrTy(*Ctx);
-  // This structure should be kept consistent with the StructInfo struct
-  // in the runtime library.
-  // struct StructInfo {
-  //   const char *StructName;
-  //   u32 Size;
-  //   u32 NumFields;
-  //   u32 *FieldOffset;           // auxiliary struct field info.
-  //   u32 *FieldSize;             // auxiliary struct field info.
-  //   const char **FieldTypeName; // auxiliary struct field info.
-  //   u64 *FieldCounters;
-  //   u64 *ArrayCounter;
-  // };
-  auto *StructInfoTy =
-      StructType::get(Int8PtrTy, Int32Ty, Int32Ty, Int32PtrTy, Int32PtrTy,
-                      Int8PtrPtrTy, Int64PtrTy, Int64PtrTy);
-  auto *StructInfoPtrTy = StructInfoTy->getPointerTo();
-  // This structure should be kept consistent with the CacheFragInfo struct
-  // in the runtime library.
-  // struct CacheFragInfo {
-  //   const char *UnitName;
-  //   u32 NumStructs;
-  //   StructInfo *Structs;
-  // };
-  auto *CacheFragInfoTy = StructType::get(Int8PtrTy, Int32Ty, StructInfoPtrTy);
-
-  std::vector<StructType *> Vec = M.getIdentifiedStructTypes();
-  unsigned NumStructs = 0;
-  SmallVector<Constant *, 16> Initializers;
-
-  for (auto &StructTy : Vec) {
-    if (shouldIgnoreStructType(StructTy)) {
-      ++NumIgnoredStructs;
-      continue;
-    }
-    ++NumStructs;
-
-    // StructName.
-    SmallString<MaxStructCounterNameSize> CounterNameStr;
-    createStructCounterName(StructTy, CounterNameStr);
-    GlobalVariable *StructCounterName = createPrivateGlobalForString(
-        M, CounterNameStr, /*AllowMerging*/true);
-
-    // Counters.
-    // We create the counter array with StructCounterName and weak linkage
-    // so that the structs with the same name and layout from different
-    // compilation units will be merged into one.
-    auto *CounterArrayTy = ArrayType::get(Int64Ty,
-                                          getStructCounterSize(StructTy));
-    GlobalVariable *Counters =
-      new GlobalVariable(M, CounterArrayTy, false,
-                         GlobalVariable::WeakAnyLinkage,
-                         ConstantAggregateZero::get(CounterArrayTy),
-                         CounterNameStr);
-
-    // Remember the counter variable for each struct type.
-    StructTyMap.insert(std::pair<Type *, GlobalVariable *>(StructTy, Counters));
-
-    // We pass the field type name array, offset array, and size array to
-    // the runtime for better reporting.
-    GlobalVariable *TypeName = nullptr, *Offset = nullptr, *Size = nullptr;
-    if (ClAuxFieldInfo)
-      createCacheFragAuxGV(M, DL, StructTy, TypeName, Offset, Size);
-
-    Constant *FieldCounterIdx[2];
-    FieldCounterIdx[0] = ConstantInt::get(Int32Ty, 0);
-    FieldCounterIdx[1] = ConstantInt::get(Int32Ty,
-                                          getFieldCounterIdx(StructTy));
-    Constant *ArrayCounterIdx[2];
-    ArrayCounterIdx[0] = ConstantInt::get(Int32Ty, 0);
-    ArrayCounterIdx[1] = ConstantInt::get(Int32Ty,
-                                          getArrayCounterIdx(StructTy));
-    Initializers.push_back(ConstantStruct::get(
-        StructInfoTy,
-        ConstantExpr::getPointerCast(StructCounterName, Int8PtrTy),
-        ConstantInt::get(Int32Ty,
-                         DL.getStructLayout(StructTy)->getSizeInBytes()),
-        ConstantInt::get(Int32Ty, StructTy->getNumElements()),
-        Offset == nullptr ? ConstantPointerNull::get(Int32PtrTy)
-                          : ConstantExpr::getPointerCast(Offset, Int32PtrTy),
-        Size == nullptr ? ConstantPointerNull::get(Int32PtrTy)
-                        : ConstantExpr::getPointerCast(Size, Int32PtrTy),
-        TypeName == nullptr
-            ? ConstantPointerNull::get(Int8PtrPtrTy)
-            : ConstantExpr::getPointerCast(TypeName, Int8PtrPtrTy),
-        ConstantExpr::getGetElementPtr(CounterArrayTy, Counters,
-                                       FieldCounterIdx),
-        ConstantExpr::getGetElementPtr(CounterArrayTy, Counters,
-                                       ArrayCounterIdx)));
-  }
-  // Structs.
-  Constant *StructInfo;
-  if (NumStructs == 0) {
-    StructInfo = ConstantPointerNull::get(StructInfoPtrTy);
-  } else {
-    auto *StructInfoArrayTy = ArrayType::get(StructInfoTy, NumStructs);
-    StructInfo = ConstantExpr::getPointerCast(
-        new GlobalVariable(M, StructInfoArrayTy, false,
-                           GlobalVariable::InternalLinkage,
-                           ConstantArray::get(StructInfoArrayTy, Initializers)),
-        StructInfoPtrTy);
-  }
-
-  auto *CacheFragInfoGV = new GlobalVariable(
-      M, CacheFragInfoTy, true, GlobalVariable::InternalLinkage,
-      ConstantStruct::get(CacheFragInfoTy, UnitName,
-                          ConstantInt::get(Int32Ty, NumStructs), StructInfo));
-  return CacheFragInfoGV;
-}
-
-// Create the tool-specific argument passed to EsanInit and EsanExit.
-Constant *EfficiencySanitizer::createEsanInitToolInfoArg(Module &M,
-                                                         const DataLayout &DL) {
-  // This structure contains tool-specific information about each compilation
-  // unit (module) and is passed to the runtime library.
-  GlobalVariable *ToolInfoGV = nullptr;
-
-  auto *Int8PtrTy = Type::getInt8PtrTy(*Ctx);
-  // Compilation unit name.
-  auto *UnitName = ConstantExpr::getPointerCast(
-      createPrivateGlobalForString(M, M.getModuleIdentifier(), true),
-      Int8PtrTy);
-
-  // Create the tool-specific variable.
-  if (Options.ToolType == EfficiencySanitizerOptions::ESAN_CacheFrag)
-    ToolInfoGV = createCacheFragInfoGV(M, DL, UnitName);
-
-  if (ToolInfoGV != nullptr)
-    return ConstantExpr::getPointerCast(ToolInfoGV, Int8PtrTy);
-
-  // Create the null pointer if no tool-specific variable created.
-  return ConstantPointerNull::get(Int8PtrTy);
-}
-
-void EfficiencySanitizer::createDestructor(Module &M, Constant *ToolInfoArg) {
-  PointerType *Int8PtrTy = Type::getInt8PtrTy(*Ctx);
-  EsanDtorFunction = Function::Create(FunctionType::get(Type::getVoidTy(*Ctx),
-                                                        false),
-                                      GlobalValue::InternalLinkage,
-                                      EsanModuleDtorName, &M);
-  ReturnInst::Create(*Ctx, BasicBlock::Create(*Ctx, "", EsanDtorFunction));
-  IRBuilder<> IRB_Dtor(EsanDtorFunction->getEntryBlock().getTerminator());
-  FunctionCallee EsanExit =
-      M.getOrInsertFunction(EsanExitName, IRB_Dtor.getVoidTy(), Int8PtrTy);
-  IRB_Dtor.CreateCall(EsanExit, {ToolInfoArg});
-  appendToGlobalDtors(M, EsanDtorFunction, EsanCtorAndDtorPriority);
-}
-
-bool EfficiencySanitizer::initOnModule(Module &M) {
-
-  Triple TargetTriple(M.getTargetTriple());
-  if (TargetTriple.isMIPS64())
-    ShadowParams = ShadowParams40;
-  else
-    ShadowParams = ShadowParams47;
-
-  Ctx = &M.getContext();
-  const DataLayout &DL = M.getDataLayout();
-  IRBuilder<> IRB(M.getContext());
-  IntegerType *OrdTy = IRB.getInt32Ty();
-  PointerType *Int8PtrTy = Type::getInt8PtrTy(*Ctx);
-  IntptrTy = DL.getIntPtrType(M.getContext());
-  // Create the variable passed to EsanInit and EsanExit.
-  Constant *ToolInfoArg = createEsanInitToolInfoArg(M, DL);
-  // Constructor
-  // We specify the tool type both in the EsanWhichToolName global
-  // and as an arg to the init routine as a sanity check.
-  std::tie(EsanCtorFunction, std::ignore) = createSanitizerCtorAndInitFunctions(
-      M, EsanModuleCtorName, EsanInitName, /*InitArgTypes=*/{OrdTy, Int8PtrTy},
-      /*InitArgs=*/{
-        ConstantInt::get(OrdTy, static_cast<int>(Options.ToolType)),
-        ToolInfoArg});
-  appendToGlobalCtors(M, EsanCtorFunction, EsanCtorAndDtorPriority);
-
-  createDestructor(M, ToolInfoArg);
-
-  new GlobalVariable(M, OrdTy, true,
-                     GlobalValue::WeakAnyLinkage,
-                     ConstantInt::get(OrdTy,
-                                      static_cast<int>(Options.ToolType)),
-                     EsanWhichToolName);
-
-  return true;
-}
-
-Value *EfficiencySanitizer::appToShadow(Value *Shadow, IRBuilder<> &IRB) {
-  // Shadow = ((App & Mask) + Offs) >> Scale
-  Shadow = IRB.CreateAnd(Shadow, ConstantInt::get(IntptrTy, ShadowParams.ShadowMask));
-  uint64_t Offs;
-  int Scale = ShadowScale[Options.ToolType];
-  if (Scale <= 2)
-    Offs = ShadowParams.ShadowOffs[Scale];
-  else
-    Offs = ShadowParams.ShadowOffs[0] << Scale;
-  Shadow = IRB.CreateAdd(Shadow, ConstantInt::get(IntptrTy, Offs));
-  if (Scale > 0)
-    Shadow = IRB.CreateLShr(Shadow, Scale);
-  return Shadow;
-}
-
-bool EfficiencySanitizer::shouldIgnoreMemoryAccess(Instruction *I) {
-  if (Options.ToolType == EfficiencySanitizerOptions::ESAN_CacheFrag) {
-    // We'd like to know about cache fragmentation in vtable accesses and
-    // constant data references, so we do not currently ignore anything.
-    return false;
-  } else if (Options.ToolType == EfficiencySanitizerOptions::ESAN_WorkingSet) {
-    // TODO: the instrumentation disturbs the data layout on the stack, so we
-    // may want to add an option to ignore stack references (if we can
-    // distinguish them) to reduce overhead.
-  }
-  // TODO(bruening): future tools will be returning true for some cases.
-  return false;
-}
-
-bool EfficiencySanitizer::runOnModule(Module &M) {
-  bool Res = initOnModule(M);
-  initializeCallbacks(M);
-  for (auto &F : M) {
-    Res |= runOnFunction(F, M);
-  }
-  return Res;
-}
-
-bool EfficiencySanitizer::runOnFunction(Function &F, Module &M) {
-  // This is required to prevent instrumenting the call to __esan_init from
-  // within the module constructor.
-  if (&F == EsanCtorFunction)
-    return false;
-  SmallVector<Instruction *, 8> LoadsAndStores;
-  SmallVector<Instruction *, 8> MemIntrinCalls;
-  SmallVector<Instruction *, 8> GetElementPtrs;
-  bool Res = false;
-  const DataLayout &DL = M.getDataLayout();
-  const TargetLibraryInfo *TLI =
-      &getAnalysis<TargetLibraryInfoWrapperPass>().getTLI();
-
-  for (auto &BB : F) {
-    for (auto &Inst : BB) {
-      if ((isa<LoadInst>(Inst) || isa<StoreInst>(Inst) ||
-           isa<AtomicRMWInst>(Inst) || isa<AtomicCmpXchgInst>(Inst)) &&
-          !shouldIgnoreMemoryAccess(&Inst))
-        LoadsAndStores.push_back(&Inst);
-      else if (isa<MemIntrinsic>(Inst))
-        MemIntrinCalls.push_back(&Inst);
-      else if (isa<GetElementPtrInst>(Inst))
-        GetElementPtrs.push_back(&Inst);
-      else if (CallInst *CI = dyn_cast<CallInst>(&Inst))
-        maybeMarkSanitizerLibraryCallNoBuiltin(CI, TLI);
-    }
-  }
-
-  if (ClInstrumentLoadsAndStores) {
-    for (auto Inst : LoadsAndStores) {
-      Res |= instrumentLoadOrStore(Inst, DL);
-    }
-  }
-
-  if (ClInstrumentMemIntrinsics) {
-    for (auto Inst : MemIntrinCalls) {
-      Res |= instrumentMemIntrinsic(cast<MemIntrinsic>(Inst));
-    }
-  }
-
-  if (Options.ToolType == EfficiencySanitizerOptions::ESAN_CacheFrag) {
-    for (auto Inst : GetElementPtrs) {
-      Res |= instrumentGetElementPtr(Inst, M);
-    }
-  }
-
-  return Res;
-}
-
-bool EfficiencySanitizer::instrumentLoadOrStore(Instruction *I,
-                                                const DataLayout &DL) {
-  IRBuilder<> IRB(I);
-  bool IsStore;
-  Value *Addr;
-  unsigned Alignment;
-  if (LoadInst *Load = dyn_cast<LoadInst>(I)) {
-    IsStore = false;
-    Alignment = Load->getAlignment();
-    Addr = Load->getPointerOperand();
-  } else if (StoreInst *Store = dyn_cast<StoreInst>(I)) {
-    IsStore = true;
-    Alignment = Store->getAlignment();
-    Addr = Store->getPointerOperand();
-  } else if (AtomicRMWInst *RMW = dyn_cast<AtomicRMWInst>(I)) {
-    IsStore = true;
-    Alignment = 0;
-    Addr = RMW->getPointerOperand();
-  } else if (AtomicCmpXchgInst *Xchg = dyn_cast<AtomicCmpXchgInst>(I)) {
-    IsStore = true;
-    Alignment = 0;
-    Addr = Xchg->getPointerOperand();
-  } else
-    llvm_unreachable("Unsupported mem access type");
-
-  Type *OrigTy = cast<PointerType>(Addr->getType())->getElementType();
-  const uint32_t TypeSizeBytes = DL.getTypeStoreSizeInBits(OrigTy) / 8;
-  FunctionCallee OnAccessFunc = nullptr;
-
-  // Convert 0 to the default alignment.
-  if (Alignment == 0)
-    Alignment = DL.getPrefTypeAlignment(OrigTy);
-
-  if (IsStore)
-    NumInstrumentedStores++;
-  else
-    NumInstrumentedLoads++;
-  int Idx = getMemoryAccessFuncIndex(Addr, DL);
-  if (Idx < 0) {
-    OnAccessFunc = IsStore ? EsanUnalignedStoreN : EsanUnalignedLoadN;
-    IRB.CreateCall(OnAccessFunc,
-                   {IRB.CreatePointerCast(Addr, IRB.getInt8PtrTy()),
-                    ConstantInt::get(IntptrTy, TypeSizeBytes)});
-  } else {
-    if (ClInstrumentFastpath &&
-        instrumentFastpath(I, DL, IsStore, Addr, Alignment)) {
-      NumFastpaths++;
-      return true;
-    }
-    if (Alignment == 0 || (Alignment % TypeSizeBytes) == 0)
-      OnAccessFunc = IsStore ? EsanAlignedStore[Idx] : EsanAlignedLoad[Idx];
-    else
-      OnAccessFunc = IsStore ? EsanUnalignedStore[Idx] : EsanUnalignedLoad[Idx];
-    IRB.CreateCall(OnAccessFunc,
-                   IRB.CreatePointerCast(Addr, IRB.getInt8PtrTy()));
-  }
-  return true;
-}
-
-// It's simplest to replace the memset/memmove/memcpy intrinsics with
-// calls that the runtime library intercepts.
-// Our pass is late enough that calls should not turn back into intrinsics.
-bool EfficiencySanitizer::instrumentMemIntrinsic(MemIntrinsic *MI) {
-  IRBuilder<> IRB(MI);
-  bool Res = false;
-  if (isa<MemSetInst>(MI)) {
-    IRB.CreateCall(
-        MemsetFn,
-        {IRB.CreatePointerCast(MI->getArgOperand(0), IRB.getInt8PtrTy()),
-         IRB.CreateIntCast(MI->getArgOperand(1), IRB.getInt32Ty(), false),
-         IRB.CreateIntCast(MI->getArgOperand(2), IntptrTy, false)});
-    MI->eraseFromParent();
-    Res = true;
-  } else if (isa<MemTransferInst>(MI)) {
-    IRB.CreateCall(
-        isa<MemCpyInst>(MI) ? MemcpyFn : MemmoveFn,
-        {IRB.CreatePointerCast(MI->getArgOperand(0), IRB.getInt8PtrTy()),
-         IRB.CreatePointerCast(MI->getArgOperand(1), IRB.getInt8PtrTy()),
-         IRB.CreateIntCast(MI->getArgOperand(2), IntptrTy, false)});
-    MI->eraseFromParent();
-    Res = true;
-  } else
-    llvm_unreachable("Unsupported mem intrinsic type");
-  return Res;
-}
-
-bool EfficiencySanitizer::instrumentGetElementPtr(Instruction *I, Module &M) {
-  GetElementPtrInst *GepInst = dyn_cast<GetElementPtrInst>(I);
-  bool Res = false;
-  if (GepInst == nullptr || GepInst->getNumIndices() == 1) {
-    ++NumIgnoredGEPs;
-    return false;
-  }
-  Type *SourceTy = GepInst->getSourceElementType();
-  StructType *StructTy = nullptr;
-  ConstantInt *Idx;
-  // Check if GEP calculates address from a struct array.
-  if (isa<StructType>(SourceTy)) {
-    StructTy = cast<StructType>(SourceTy);
-    Idx = dyn_cast<ConstantInt>(GepInst->getOperand(1));
-    if ((Idx == nullptr || Idx->getSExtValue() != 0) &&
-        !shouldIgnoreStructType(StructTy) && StructTyMap.count(StructTy) != 0)
-      Res |= insertCounterUpdate(I, StructTy, getArrayCounterIdx(StructTy));
-  }
-  // Iterate all (except the first and the last) idx within each GEP instruction
-  // for possible nested struct field address calculation.
-  for (unsigned i = 1; i < GepInst->getNumIndices(); ++i) {
-    SmallVector<Value *, 8> IdxVec(GepInst->idx_begin(),
-                                   GepInst->idx_begin() + i);
-    Type *Ty = GetElementPtrInst::getIndexedType(SourceTy, IdxVec);
-    unsigned CounterIdx = 0;
-    if (isa<ArrayType>(Ty)) {
-      ArrayType *ArrayTy = cast<ArrayType>(Ty);
-      StructTy = dyn_cast<StructType>(ArrayTy->getElementType());
-      if (shouldIgnoreStructType(StructTy) || StructTyMap.count(StructTy) == 0)
-        continue;
-      // The last counter for struct array access.
-      CounterIdx = getArrayCounterIdx(StructTy);
-    } else if (isa<StructType>(Ty)) {
-      StructTy = cast<StructType>(Ty);
-      if (shouldIgnoreStructType(StructTy) || StructTyMap.count(StructTy) == 0)
-        continue;
-      // Get the StructTy's subfield index.
-      Idx = cast<ConstantInt>(GepInst->getOperand(i+1));
-      assert(Idx->getSExtValue() >= 0 &&
-             Idx->getSExtValue() < StructTy->getNumElements());
-      CounterIdx = getFieldCounterIdx(StructTy) + Idx->getSExtValue();
-    }
-    Res |= insertCounterUpdate(I, StructTy, CounterIdx);
-  }
-  if (Res)
-    ++NumInstrumentedGEPs;
-  else
-    ++NumIgnoredGEPs;
-  return Res;
-}
-
-bool EfficiencySanitizer::insertCounterUpdate(Instruction *I,
-                                              StructType *StructTy,
-                                              unsigned CounterIdx) {
-  GlobalVariable *CounterArray = StructTyMap[StructTy];
-  if (CounterArray == nullptr)
-    return false;
-  IRBuilder<> IRB(I);
-  Constant *Indices[2];
-  // Xref http://llvm.org/docs/LangRef.html#i-getelementptr and
-  // http://llvm.org/docs/GetElementPtr.html.
-  // The first index of the GEP instruction steps through the first operand,
-  // i.e., the array itself.
-  Indices[0] = ConstantInt::get(IRB.getInt32Ty(), 0);
-  // The second index is the index within the array.
-  Indices[1] = ConstantInt::get(IRB.getInt32Ty(), CounterIdx);
-  Constant *Counter =
-    ConstantExpr::getGetElementPtr(
-        ArrayType::get(IRB.getInt64Ty(), getStructCounterSize(StructTy)),
-        CounterArray, Indices);
-  Value *Load = IRB.CreateLoad(IRB.getInt64Ty(), Counter);
-  IRB.CreateStore(IRB.CreateAdd(Load, ConstantInt::get(IRB.getInt64Ty(), 1)),
-                  Counter);
-  return true;
-}
-
-int EfficiencySanitizer::getMemoryAccessFuncIndex(Value *Addr,
-                                                  const DataLayout &DL) {
-  Type *OrigPtrTy = Addr->getType();
-  Type *OrigTy = cast<PointerType>(OrigPtrTy)->getElementType();
-  assert(OrigTy->isSized());
-  // The size is always a multiple of 8.
-  uint32_t TypeSizeBytes = DL.getTypeStoreSizeInBits(OrigTy) / 8;
-  if (TypeSizeBytes != 1 && TypeSizeBytes != 2 && TypeSizeBytes != 4 &&
-      TypeSizeBytes != 8 && TypeSizeBytes != 16) {
-    // Irregular sizes do not have per-size call targets.
-    NumAccessesWithIrregularSize++;
-    return -1;
-  }
-  size_t Idx = countTrailingZeros(TypeSizeBytes);
-  assert(Idx < NumberOfAccessSizes);
-  return Idx;
-}
-
-bool EfficiencySanitizer::instrumentFastpath(Instruction *I,
-                                             const DataLayout &DL, bool IsStore,
-                                             Value *Addr, unsigned Alignment) {
-  if (Options.ToolType == EfficiencySanitizerOptions::ESAN_CacheFrag) {
-    return instrumentFastpathCacheFrag(I, DL, Addr, Alignment);
-  } else if (Options.ToolType == EfficiencySanitizerOptions::ESAN_WorkingSet) {
-    return instrumentFastpathWorkingSet(I, DL, Addr, Alignment);
-  }
-  return false;
-}
-
-bool EfficiencySanitizer::instrumentFastpathCacheFrag(Instruction *I,
-                                                      const DataLayout &DL,
-                                                      Value *Addr,
-                                                      unsigned Alignment) {
-  // Do nothing.
-  return true; // Return true to avoid slowpath instrumentation.
-}
-
-bool EfficiencySanitizer::instrumentFastpathWorkingSet(
-    Instruction *I, const DataLayout &DL, Value *Addr, unsigned Alignment) {
-  assert(ShadowScale[Options.ToolType] == 6); // The code below assumes this
-  IRBuilder<> IRB(I);
-  Type *OrigTy = cast<PointerType>(Addr->getType())->getElementType();
-  const uint32_t TypeSize = DL.getTypeStoreSizeInBits(OrigTy);
-  // Bail to the slowpath if the access might touch multiple cache lines.
-  // An access aligned to its size is guaranteed to be intra-cache-line.
-  // getMemoryAccessFuncIndex has already ruled out a size larger than 16
-  // and thus larger than a cache line for platforms this tool targets
-  // (and our shadow memory setup assumes 64-byte cache lines).
-  assert(TypeSize <= 128);
-  if (!(TypeSize == 8 ||
-        (Alignment % (TypeSize / 8)) == 0)) {
-    if (ClAssumeIntraCacheLine)
-      ++NumAssumedIntraCacheLine;
-    else
-      return false;
-  }
-
-  // We inline instrumentation to set the corresponding shadow bits for
-  // each cache line touched by the application.  Here we handle a single
-  // load or store where we've already ruled out the possibility that it
-  // might touch more than one cache line and thus we simply update the
-  // shadow memory for a single cache line.
-  // Our shadow memory model is fine with races when manipulating shadow values.
-  // We generate the following code:
-  //
-  //   const char BitMask = 0x81;
-  //   char *ShadowAddr = appToShadow(AppAddr);
-  //   if ((*ShadowAddr & BitMask) != BitMask)
-  //     *ShadowAddr |= Bitmask;
-  //
-  Value *AddrPtr = IRB.CreatePointerCast(Addr, IntptrTy);
-  Value *ShadowPtr = appToShadow(AddrPtr, IRB);
-  Type *ShadowTy = IntegerType::get(*Ctx, 8U);
-  Type *ShadowPtrTy = PointerType::get(ShadowTy, 0);
-  // The bottom bit is used for the current sampling period's working set.
-  // The top bit is used for the total working set.  We set both on each
-  // memory access, if they are not already set.
-  Value *ValueMask = ConstantInt::get(ShadowTy, 0x81); // 10000001B
-
-  Value *OldValue =
-      IRB.CreateLoad(ShadowTy, IRB.CreateIntToPtr(ShadowPtr, ShadowPtrTy));
-  // The AND and CMP will be turned into a TEST instruction by the compiler.
-  Value *Cmp = IRB.CreateICmpNE(IRB.CreateAnd(OldValue, ValueMask), ValueMask);
-  Instruction *CmpTerm = SplitBlockAndInsertIfThen(Cmp, I, false);
-  // FIXME: do I need to call SetCurrentDebugLocation?
-  IRB.SetInsertPoint(CmpTerm);
-  // We use OR to set the shadow bits to avoid corrupting the middle 6 bits,
-  // which are used by the runtime library.
-  Value *NewVal = IRB.CreateOr(OldValue, ValueMask);
-  IRB.CreateStore(NewVal, IRB.CreateIntToPtr(ShadowPtr, ShadowPtrTy));
-  IRB.SetInsertPoint(I);
-
-  return true;
-}

llvm/lib/Transforms/Instrumentation/Instrumentation.cpp

void llvm::initializeInstrumentation(PassRegistry &Registry) {
   initializePGOMemOPSizeOptLegacyPassPass(Registry);
   initializeInstrOrderFileLegacyPassPass(Registry);
   initializeInstrProfilingLegacyPassPass(Registry);
   initializeMemorySanitizerLegacyPassPass(Registry);
   initializeHWAddressSanitizerPass(Registry);
   initializeThreadSanitizerLegacyPassPass(Registry);
   initializeSanitizerCoverageModulePass(Registry);
   initializeDataFlowSanitizerPass(Registry);
-  initializeEfficiencySanitizerPass(Registry);
 }
 
 /// LLVMInitializeInstrumentation - C binding for
 /// initializeInstrumentation.
 void LLVMInitializeInstrumentation(LLVMPassRegistryRef R) {
   initializeInstrumentation(*unwrap(R));
 }

llvm/test/Instrumentation/EfficiencySanitizer/str-nobuiltin.ll

-; Test marking string functions as nobuiltin in efficiency sanitizer.
-;
-; RUN: opt < %s -esan -S | FileCheck %s
-target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
-target triple = "x86_64-unknown-linux-gnu"
-
-declare i8* @memchr(i8* %a, i32 %b, i64 %c)
-declare i32 @memcmp(i8* %a, i8* %b, i64 %c)
-declare i32 @strcmp(i8* %a, i8* %b)
-declare i8* @strcpy(i8* %a, i8* %b)
-declare i8* @stpcpy(i8* %a, i8* %b)
-declare i64 @strlen(i8* %a)
-declare i64 @strnlen(i8* %a, i64 %b)
-
-; CHECK: call{{.*}}@memchr{{.*}} #[[ATTR:[0-9]+]]
-; CHECK: call{{.*}}@memcmp{{.*}} #[[ATTR]]
-; CHECK: call{{.*}}@strcmp{{.*}} #[[ATTR]]
-; CHECK: call{{.*}}@strcpy{{.*}} #[[ATTR]]
-; CHECK: call{{.*}}@stpcpy{{.*}} #[[ATTR]]
-; CHECK: call{{.*}}@strlen{{.*}} #[[ATTR]]
-; CHECK: call{{.*}}@strnlen{{.*}} #[[ATTR]]
-; attributes #[[ATTR]] = { nobuiltin }
-
-define void @f1(i8* %a, i8* %b) nounwind uwtable {
-  tail call i8* @memchr(i8* %a, i32 1, i64 12)
-  tail call i32 @memcmp(i8* %a, i8* %b, i64 12)
-  tail call i32 @strcmp(i8* %a, i8* %b)
-  tail call i8* @strcpy(i8* %a, i8* %b)
-  tail call i8* @stpcpy(i8* %a, i8* %b)
-  tail call i64 @strlen(i8* %a)
-  tail call i64 @strnlen(i8* %a, i64 12)
-  ret void
-}

llvm/test/Instrumentation/EfficiencySanitizer/struct_field_count_basic.ll

-; Test basic EfficiencySanitizer struct field count instrumentation.
-;
-; RUN: opt < %s -esan -esan-cache-frag -S | FileCheck %s
-
-%struct.A = type { i32, i32 }
-%union.U = type { double }
-%struct.C = type { %struct.anon, %union.anon, [10 x i8] }
-%struct.anon = type { i32, i32 }
-%union.anon = type { double }
-
-; CHECK:        @0 = private unnamed_addr constant [8 x i8] c"<stdin>\00", align 1
-; CHECK-NEXT:   @1 = private unnamed_addr constant [17 x i8] c"struct.A$2$11$11\00", align 1
-; CHECK-NEXT:   @"struct.A$2$11$11" = weak global [3 x i64] zeroinitializer
-; CHECK-NEXT:   @2 = internal constant [2 x i8*] [i8* getelementptr inbounds ([4 x i8], [4 x i8]* @5, i32 0, i32 0), i8* getelementptr inbounds ([4 x i8], [4 x i8]* @6, i32 0, i32 0)]
-; CHECK-NEXT:   @3 = internal constant [2 x i32] [i32 0, i32 4]
-; CHECK-NEXT:   @4 = internal constant [2 x i32] [i32 4, i32 4]
-; CHECK-NEXT:   @5 = private unnamed_addr constant [4 x i8] c"i32\00", align 1
-; CHECK-NEXT:   @6 = private unnamed_addr constant [4 x i8] c"i32\00", align 1
-; CHECK-NEXT:   @7 = private unnamed_addr constant [12 x i8] c"union.U$1$3\00", align 1
-; CHECK-NEXT:   @"union.U$1$3" = weak global [2 x i64] zeroinitializer
-; CHECK-NEXT:   @8 = internal constant [1 x i8*] [i8* getelementptr inbounds ([7 x i8], [7 x i8]* @11, i32 0, i32 0)]
-; CHECK-NEXT:   @9 = internal constant [1 x i32] zeroinitializer
-; CHECK-NEXT:   @10 = internal constant [1 x i32] [i32 8]
-; CHECK-NEXT:   @11 = private unnamed_addr constant [7 x i8] c"double\00", align 1
-; CHECK-NEXT:   @12 = private unnamed_addr constant [20 x i8] c"struct.C$3$14$13$13\00", align 1
-; CHECK-NEXT:   @"struct.C$3$14$13$13" = weak global [4 x i64] zeroinitializer
-; CHECK-NEXT:   @13 = internal constant [3 x i8*] [i8* getelementptr inbounds ([33 x i8], [33 x i8]* @16, i32 0, i32 0), i8* getelementptr inbounds ([30 x i8], [30 x i8]* @17, i32 0, i32 0), i8* getelementptr inbounds ([10 x i8], [10 x i8]* @18, i32 0, i32 0)]
-; CHECK-NEXT:   @14 = internal constant [3 x i32] [i32 0, i32 8, i32 16]
-; CHECK-NEXT:   @15 = internal constant [3 x i32] [i32 8, i32 8, i32 10]
-; CHECK-NEXT:   @16 = private unnamed_addr constant [33 x i8] c"%struct.anon = type { i32, i32 }\00", align 1
-; CHECK-NEXT:   @17 = private unnamed_addr constant [30 x i8] c"%union.anon = type { double }\00", align 1
-; CHECK-NEXT:   @18 = private unnamed_addr constant [10 x i8] c"[10 x i8]\00", align 1
-; CHECK-NEXT:   @19 = private unnamed_addr constant [20 x i8] c"struct.anon$2$11$11\00", align 1
-; CHECK-NEXT:   @"struct.anon$2$11$11" = weak global [3 x i64] zeroinitializer
-; CHECK-NEXT:   @20 = internal constant [2 x i8*] [i8* getelementptr inbounds ([4 x i8], [4 x i8]* @23, i32 0, i32 0), i8* getelementptr inbounds ([4 x i8], [4 x i8]* @24, i32 0, i32 0)]
-; CHECK-NEXT:   @21 = internal constant [2 x i32] [i32 0, i32 4]
-; CHECK-NEXT:   @22 = internal constant [2 x i32] [i32 4, i32 4]
-; CHECK-NEXT:   @23 = private unnamed_addr constant [4 x i8] c"i32\00", align 1
-; CHECK-NEXT:   @24 = private unnamed_addr constant [4 x i8] c"i32\00", align 1
-; CHECK-NEXT:   @25 = private unnamed_addr constant [15 x i8] c"union.anon$1$3\00", align 1
-; CHECK-NEXT:   @"union.anon$1$3" = weak global [2 x i64] zeroinitializer
-; CHECK-NEXT:   @26 = internal constant [1 x i8*] [i8* getelementptr inbounds ([7 x i8], [7 x i8]* @29, i32 0, i32 0)]
-; CHECK-NEXT:   @27 = internal constant [1 x i32] zeroinitializer
-; CHECK-NEXT:   @28 = internal constant [1 x i32] [i32 8]
-; CHECK-NEXT:   @29 = private unnamed_addr constant [7 x i8] c"double\00", align 1
-; CHECK-NEXT:   @30 = internal global [5 x { i8*, i32, i32, i32*, i32*, i8**, i64*, i64* }] [{ i8*, i32, i32, i32*, i32*, i8**, i64*, i64* } { i8* getelementptr inbounds ([17 x i8], [17 x i8]* @1, i32 0, i32 0), i32 8, i32 2, i32* getelementptr inbounds ([2 x i32], [2 x i32]* @3, i32 0, i32 0), i32* getelementptr inbounds ([2 x i32], [2 x i32]* @4, i32 0, i32 0), i8** getelementptr inbounds ([2 x i8*], [2 x i8*]* @2, i32 0, i32 0), i64* getelementptr inbounds ([3 x i64], [3 x i64]* @"struct.A$2$11$11", i32 0, i32 0), i64* getelementptr inbounds ([3 x i64], [3 x i64]* @"struct.A$2$11$11", i32 0, i32 2) }, { i8*, i32, i32, i32*, i32*, i8**, i64*, i64* } { i8* getelementptr inbounds ([12 x i8], [12 x i8]* @7, i32 0, i32 0), i32 8, i32 1, i32* getelementptr inbounds ([1 x i32], [1 x i32]* @9, i32 0, i32 0), i32* getelementptr inbounds ([1 x i32], [1 x i32]* @10, i32 0, i32 0), i8** getelementptr inbounds ([1 x i8*], [1 x i8*]* @8, i32 0, i32 0), i64* getelementptr inbounds ([2 x i64], [2 x i64]* @"union.U$1$3", i32 0, i32 0), i64* getelementptr inbounds ([2 x i64], [2 x i64]* @"union.U$1$3", i32 0, i32 1) }, { i8*, i32, i32, i32*, i32*, i8**, i64*, i64* } { i8* getelementptr inbounds ([20 x i8], [20 x i8]* @12, i32 0, i32 0), i32 32, i32 3, i32* getelementptr inbounds ([3 x i32], [3 x i32]* @14, i32 0, i32 0), i32* getelementptr inbounds ([3 x i32], [3 x i32]* @15, i32 0, i32 0), i8** getelementptr inbounds ([3 x i8*], [3 x i8*]* @13, i32 0, i32 0), i64* getelementptr inbounds ([4 x i64], [4 x i64]* @"struct.C$3$14$13$13", i32 0, i32 0), i64* getelementptr inbounds ([4 x i64], [4 x i64]* @"struct.C$3$14$13$13", i32 0, i32 3) }, { i8*, i32, i32, i32*, i32*, i8**, i64*, i64* } { i8* getelementptr inbounds ([20 x i8], [20 x i8]* @19, i32 0, i32 0), i32 8, i32 2, i32* getelementptr inbounds ([2 x i32], [2 x i32]* @21, i32 0, i32 0), i32* getelementptr inbounds ([2 x i32], [2 x i32]* @22, i32 0, i32 0), i8** getelementptr inbounds ([2 x i8*], [2 x i8*]* @20, i32 0, i32 0), i64* getelementptr inbounds ([3 x i64], [3 x i64]* @"struct.anon$2$11$11", i32 0, i32 0), i64* getelementptr inbounds ([3 x i64], [3 x i64]* @"struct.anon$2$11$11", i32 0, i32 2) }, { i8*, i32, i32, i32*, i32*, i8**, i64*, i64* } { i8* getelementptr inbounds ([15 x i8], [15 x i8]* @25, i32 0, i32 0), i32 8, i32 1, i32* getelementptr inbounds ([1 x i32], [1 x i32]* @27, i32 0, i32 0), i32* getelementptr inbounds ([1 x i32], [1 x i32]* @28, i32 0, i32 0), i8** getelementptr inbounds ([1 x i8*], [1 x i8*]* @26, i32 0, i32 0), i64* getelementptr inbounds ([2 x i64], [2 x i64]* @"union.anon$1$3", i32 0, i32 0), i64* getelementptr inbounds ([2 x i64], [2 x i64]* @"union.anon$1$3", i32 0, i32 1) }]
-; CHECK-NEXT:   @31 = internal constant { i8*, i32, { i8*, i32, i32, i32*, i32*, i8**, i64*, i64* }* } { i8* getelementptr inbounds ([8 x i8], [8 x i8]* @0, i32 0, i32 0), i32 5, { i8*, i32, i32, i32*, i32*, i8**, i64*, i64* }* getelementptr inbounds ([5 x { i8*, i32, i32, i32*, i32*, i8**, i64*, i64* }], [5 x { i8*, i32, i32, i32*, i32*, i8**, i64*, i64* }]* @30, i32 0, i32 0) }
-
-define i32 @main() {
-entry:
-  %a = alloca %struct.A, align 4
-  %u = alloca %union.U, align 8
-  %c = alloca [2 x %struct.C], align 16
-  %k = alloca %struct.A*, align 8
-  %x = getelementptr inbounds %struct.A, %struct.A* %a, i32 0, i32 0
-  %y = getelementptr inbounds %struct.A, %struct.A* %a, i32 0, i32 1
-  %f = bitcast %union.U* %u to float*
-  %d = bitcast %union.U* %u to double*
-  %arrayidx = getelementptr inbounds [2 x %struct.C], [2 x %struct.C]* %c, i64 0, i64 0
-  %cs = getelementptr inbounds %struct.C, %struct.C* %arrayidx, i32 0, i32 0
-  %x1 = getelementptr inbounds %struct.anon, %struct.anon* %cs, i32 0, i32 0
-  %arrayidx2 = getelementptr inbounds [2 x %struct.C], [2 x %struct.C]* %c, i64 0, i64 1
-  %cs3 = getelementptr inbounds %struct.C, %struct.C* %arrayidx2, i32 0, i32 0
-  %y4 = getelementptr inbounds %struct.anon, %struct.anon* %cs3, i32 0, i32 1
-  %arrayidx5 = getelementptr inbounds [2 x %struct.C], [2 x %struct.C]* %c, i64 0, i64 0
-  %cu = getelementptr inbounds %struct.C, %struct.C* %arrayidx5, i32 0, i32 1
-  %f6 = bitcast %union.anon* %cu to float*
-  %arrayidx7 = getelementptr inbounds [2 x %struct.C], [2 x %struct.C]* %c, i64 0, i64 1
-  %cu8 = getelementptr inbounds %struct.C, %struct.C* %arrayidx7, i32 0, i32 1
-  %d9 = bitcast %union.anon* %cu8 to double*
-  %arrayidx10 = getelementptr inbounds [2 x %struct.C], [2 x %struct.C]* %c, i64 0, i64 0
-  %c11 = getelementptr inbounds %struct.C, %struct.C* %arrayidx10, i32 0, i32 2
-  %arrayidx12 = getelementptr inbounds [10 x i8], [10 x i8]* %c11, i64 0, i64 2
-  %k1 = load %struct.A*, %struct.A** %k, align 8
-  %arrayidx13 = getelementptr inbounds %struct.A, %struct.A* %k1, i64 0
-  ret i32 0
-}
-
-; CHECK: @llvm.global_ctors = {{.*}}@esan.module_ctor
-; CHECK: @llvm.global_dtors = {{.*}}@esan.module_dtor
-
-; CHECK:        %a = alloca %struct.A, align 4
-; CHECK-NEXT:   %u = alloca %union.U, align 8
-; CHECK-NEXT:   %c = alloca [2 x %struct.C], align 16
-; CHECK-NEXT:   %k = alloca %struct.A*, align 8
-; CHECK-NEXT:   %0 = load i64, i64* getelementptr inbounds ([3 x i64], [3 x i64]* @"struct.A$2$11$11", i32 0, i32 0)
-; CHECK-NEXT:   %1 = add i64 %0, 1
-; CHECK-NEXT:   store i64 %1, i64* getelementptr inbounds ([3 x i64], [3 x i64]* @"struct.A$2$11$11", i32 0, i32 0)
-; CHECK-NEXT:   %x = getelementptr inbounds %struct.A, %struct.A* %a, i32 0, i32 0
-; CHECK-NEXT:   %2 = load i64, i64* getelementptr inbounds ([3 x i64], [3 x i64]* @"struct.A$2$11$11", i32 0, i32 1)
-; CHECK-NEXT:   %3 = add i64 %2, 1
-; CHECK-NEXT:   store i64 %3, i64* getelementptr inbounds ([3 x i64], [3 x i64]* @"struct.A$2$11$11", i32 0, i32 1)
-; CHECK-NEXT:   %y = getelementptr inbounds %struct.A, %struct.A* %a, i32 0, i32 1
-; CHECK-NEXT:   %f = bitcast %union.U* %u to float*
-; CHECK-NEXT:   %d = bitcast %union.U* %u to double*
-; CHECK-NEXT:   %4 = load i64, i64* getelementptr inbounds ([4 x i64], [4 x i64]* @"struct.C$3$14$13$13", i32 0, i32 3)
-; CHECK-NEXT:   %5 = add i64 %4, 1
-; CHECK-NEXT:   store i64 %5, i64* getelementptr inbounds ([4 x i64], [4 x i64]* @"struct.C$3$14$13$13", i32 0, i32 3)
-; CHECK-NEXT:   %arrayidx = getelementptr inbounds [2 x %struct.C], [2 x %struct.C]* %c, i64 0, i64 0
-; CHECK-NEXT:   %6 = load i64, i64* getelementptr inbounds ([4 x i64], [4 x i64]* @"struct.C$3$14$13$13", i32 0, i32 0)
-; CHECK-NEXT:   %7 = add i64 %6, 1
-; CHECK-NEXT:   store i64 %7, i64* getelementptr inbounds ([4 x i64], [4 x i64]* @"struct.C$3$14$13$13", i32 0, i32 0)
-; CHECK-NEXT:   %cs = getelementptr inbounds %struct.C, %struct.C* %arrayidx, i32 0, i32 0
-; CHECK-NEXT:   %8 = load i64, i64* getelementptr inbounds ([3 x i64], [3 x i64]* @"struct.anon$2$11$11", i32 0, i32 0)
-; CHECK-NEXT:   %9 = add i64 %8, 1
-; CHECK-NEXT:   store i64 %9, i64* getelementptr inbounds ([3 x i64], [3 x i64]* @"struct.anon$2$11$11", i32 0, i32 0)
-; CHECK-NEXT:   %x1 = getelementptr inbounds %struct.anon, %struct.anon* %cs, i32 0, i32 0
-; CHECK-NEXT:   %10 = load i64, i64* getelementptr inbounds ([4 x i64], [4 x i64]* @"struct.C$3$14$13$13", i32 0, i32 3)
-; CHECK-NEXT:   %11 = add i64 %10, 1
-; CHECK-NEXT:   store i64 %11, i64* getelementptr inbounds ([4 x i64], [4 x i64]* @"struct.C$3$14$13$13", i32 0, i32 3)
-; CHECK-NEXT:   %arrayidx2 = getelementptr inbounds [2 x %struct.C], [2 x %struct.C]* %c, i64 0, i64 1
-; CHECK-NEXT:   %12 = load i64, i64* getelementptr inbounds ([4 x i64], [4 x i64]* @"struct.C$3$14$13$13", i32 0, i32 0)
-; CHECK-NEXT:   %13 = add i64 %12, 1
-; CHECK-NEXT:   store i64 %13, i64* getelementptr inbounds ([4 x i64], [4 x i64]* @"struct.C$3$14$13$13", i32 0, i32 0)
-; CHECK-NEXT:   %cs3 = getelementptr inbounds %struct.C, %struct.C* %arrayidx2, i32 0, i32 0
-; CHECK-NEXT:   %14 = load i64, i64* getelementptr inbounds ([3 x i64], [3 x i64]* @"struct.anon$2$11$11", i32 0, i32 1)
-; CHECK-NEXT:   %15 = add i64 %14, 1
-; CHECK-NEXT:   store i64 %15, i64* getelementptr inbounds ([3 x i64], [3 x i64]* @"struct.anon$2$11$11", i32 0, i32 1)
-; CHECK-NEXT:   %y4 = getelementptr inbounds %struct.anon, %struct.anon* %cs3, i32 0, i32 1
-; CHECK-NEXT:   %16 = load i64, i64* getelementptr inbounds ([4 x i64], [4 x i64]* @"struct.C$3$14$13$13", i32 0, i32 3)
-; CHECK-NEXT:   %17 = add i64 %16, 1
-; CHECK-NEXT:   store i64 %17, i64* getelementptr inbounds ([4 x i64], [4 x i64]* @"struct.C$3$14$13$13", i32 0, i32 3)
-; CHECK-NEXT:   %arrayidx5 = getelementptr inbounds [2 x %struct.C], [2 x %struct.C]* %c, i64 0, i64 0
-; CHECK-NEXT:   %18 = load i64, i64* getelementptr inbounds ([4 x i64], [4 x i64]* @"struct.C$3$14$13$13", i32 0, i32 1)
-; CHECK-NEXT:   %19 = add i64 %18, 1
-; CHECK-NEXT:   store i64 %19, i64* getelementptr inbounds ([4 x i64], [4 x i64]* @"struct.C$3$14$13$13", i32 0, i32 1)
-; CHECK-NEXT:   %cu = getelementptr inbounds %struct.C, %struct.C* %arrayidx5, i32 0, i32 1
-; CHECK-NEXT:   %f6 = bitcast %union.anon* %cu to float*
-; CHECK-NEXT:   %20 = load i64, i64* getelementptr inbounds ([4 x i64], [4 x i64]* @"struct.C$3$14$13$13", i32 0, i32 3)
-; CHECK-NEXT:   %21 = add i64 %20, 1
-; CHECK-NEXT:   store i64 %21, i64* getelementptr inbounds ([4 x i64], [4 x i64]* @"struct.C$3$14$13$13", i32 0, i32 3)
-; CHECK-NEXT:   %arrayidx7 = getelementptr inbounds [2 x %struct.C], [2 x %struct.C]* %c, i64 0, i64 1
-; CHECK-NEXT:   %22 = load i64, i64* getelementptr inbounds ([4 x i64], [4 x i64]* @"struct.C$3$14$13$13", i32 0, i32 1)
-; CHECK-NEXT:   %23 = add i64 %22, 1
-; CHECK-NEXT:   store i64 %23, i64* getelementptr inbounds ([4 x i64], [4 x i64]* @"struct.C$3$14$13$13", i32 0, i32 1)
-; CHECK-NEXT:   %cu8 = getelementptr inbounds %struct.C, %struct.C* %arrayidx7, i32 0, i32 1
-; CHECK-NEXT:   %d9 = bitcast %union.anon* %cu8 to double*
-; CHECK-NEXT:   %24 = load i64, i64* getelementptr inbounds ([4 x i64], [4 x i64]* @"struct.C$3$14$13$13", i32 0, i32 3)
-; CHECK-NEXT:   %25 = add i64 %24, 1
-; CHECK-NEXT:   store i64 %25, i64* getelementptr inbounds ([4 x i64], [4 x i64]* @"struct.C$3$14$13$13", i32 0, i32 3)
-; CHECK-NEXT:   %arrayidx10 = getelementptr inbounds [2 x %struct.C], [2 x %struct.C]* %c, i64 0, i64 0
-; CHECK-NEXT:   %26 = load i64, i64* getelementptr inbounds ([4 x i64], [4 x i64]* @"struct.C$3$14$13$13", i32 0, i32 2)
-; CHECK-NEXT:   %27 = add i64 %26, 1
-; CHECK-NEXT:   store i64 %27, i64* getelementptr inbounds ([4 x i64], [4 x i64]* @"struct.C$3$14$13$13", i32 0, i32 2)
-; CHECK-NEXT:   %c11 = getelementptr inbounds %struct.C, %struct.C* %arrayidx10, i32 0, i32 2
-; CHECK-NEXT:   %arrayidx12 = getelementptr inbounds [10 x i8], [10 x i8]* %c11, i64 0, i64 2
-; CHECK-NEXT:   %k1 = load %struct.A*, %struct.A** %k, align 8
-; CHECK-NEXT:   %arrayidx13 = getelementptr inbounds %struct.A, %struct.A* %k1, i64 0
-; CHECK-NEXT:   ret i32 0
-
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-; Top-level:
-
-; CHECK: define internal void @esan.module_ctor()
-; CHECK: call void @__esan_init(i32 1, i8* bitcast ({ i8*, i32, { i8*, i32, i32, i32*, i32*, i8**, i64*, i64* }* }* @31 to i8*))
-; CHECK: define internal void @esan.module_dtor()
-; CHECK: call void @__esan_exit(i8* bitcast ({ i8*, i32, { i8*, i32, i32, i32*, i32*, i8**, i64*, i64* }* }* @31 to i8*))

llvm/test/Instrumentation/EfficiencySanitizer/struct_field_gep.ll

-; Test the complex GetElementPtr instruction handling in the EfficiencySanitizer
-; cache fragmentation tool.
-;
-; RUN: opt < %s -esan -esan-cache-frag -S | FileCheck %s
-
-; Code from http://llvm.org/docs/LangRef.html#getelementptr-instruction
-; struct RT {
-;   char A;
-;   int B[10][20];
-;   char C;
-; };
-; struct ST {
-;   int X;
-;   double Y;
-;   struct RT Z;
-; };
-;
-; int *foo(struct ST *s) {
-;   return &s[1].Z.B[5][13];
-; }
-
-%struct.RT = type { i8, [10 x [20 x i32]], i8 }
-%struct.ST = type { i32, double, %struct.RT }
-
-define i32* @foo(%struct.ST* %s) nounwind uwtable readnone optsize ssp {
-entry:
-  %arrayidx = getelementptr inbounds %struct.ST, %struct.ST* %s, i64 1, i32 2, i32 1, i64 5, i64 13
-  ret i32* %arrayidx
-}
-
-; CHECK:        %0 = load i64, i64* getelementptr inbounds ([4 x i64], [4 x i64]* @"struct.ST$3$13$3$11", i32 0, i32 3)
-; CHECK-NEXT:   %1 = add i64 %0, 1
-; CHECK-NEXT:   store i64 %1, i64* getelementptr inbounds ([4 x i64], [4 x i64]* @"struct.ST$3$13$3$11", i32 0, i32 3)
-; CHECK-NEXT:   %2 = load i64, i64* getelementptr inbounds ([4 x i64], [4 x i64]* @"struct.ST$3$13$3$11", i32 0, i32 2)
-; CHECK-NEXT:   %3 = add i64 %2, 1
-; CHECK-NEXT:   store i64 %3, i64* getelementptr inbounds ([4 x i64], [4 x i64]* @"struct.ST$3$13$3$11", i32 0, i32 2)
-; CHECK-NEXT:   %4 = load i64, i64* getelementptr inbounds ([4 x i64], [4 x i64]* @"struct.RT$3$11$14$11", i32 0, i32 1)
-; CHECK-NEXT:   %5 = add i64 %4, 1
-; CHECK-NEXT:   store i64 %5, i64* getelementptr inbounds ([4 x i64], [4 x i64]* @"struct.RT$3$11$14$11", i32 0, i32 1)
-; CHECK-NEXT:   %arrayidx = getelementptr inbounds %struct.ST, %struct.ST* %s, i64 1, i32 2, i32 1, i64 5, i64 13
-; CHECK-NEXT:   ret i32* %arrayidx

llvm/test/Instrumentation/EfficiencySanitizer/struct_field_small.ll

-; Test basic EfficiencySanitizer struct field count instrumentation with -esan-small-binary
-;
-; RUN: opt < %s -esan -esan-cache-frag -esan-aux-field-info=false -S | FileCheck %s
-
-%struct.A = type { i32, i32 }
-%union.U = type { double }
-%struct.C = type { %struct.anon, %union.anon, [10 x i8] }
-%struct.anon = type { i32, i32 }
-%union.anon = type { double }
-
-; CHECK:        @0 = private unnamed_addr constant [8 x i8] c"<stdin>\00", align 1
-; CHECK-NEXT:   @1 = private unnamed_addr constant [17 x i8] c"struct.A$2$11$11\00", align 1
-; CHECK-NEXT:   @"struct.A$2$11$11" = weak global [3 x i64] zeroinitializer
-; CHECK-NEXT:   @2 = private unnamed_addr constant [12 x i8] c"union.U$1$3\00", align 1
-; CHECK-NEXT:   @"union.U$1$3" = weak global [2 x i64] zeroinitializer
-; CHECK-NEXT:   @3 = private unnamed_addr constant [20 x i8] c"struct.C$3$14$13$13\00", align 1
-; CHECK-NEXT:   @"struct.C$3$14$13$13" = weak global [4 x i64] zeroinitializer
-; CHECK-NEXT:   @4 = private unnamed_addr constant [20 x i8] c"struct.anon$2$11$11\00", align 1
-; CHECK-NEXT:   @"struct.anon$2$11$11" = weak global [3 x i64] zeroinitializer
-; CHECK-NEXT:   @5 = private unnamed_addr constant [15 x i8] c"union.anon$1$3\00", align 1
-; CHECK-NEXT:   @"union.anon$1$3" = weak global [2 x i64] zeroinitializer
-; CHECK-NEXT:   @6 = internal global [5 x { i8*, i32, i32, i32*, i32*, i8**, i64*, i64* }] [{ i8*, i32, i32, i32*, i32*, i8**, i64*, i64* } { i8* getelementptr inbounds ([17 x i8], [17 x i8]* @1, i32 0, i32 0), i32 8, i32 2, i32* null, i32* null, i8** null, i64* getelementptr inbounds ([3 x i64], [3 x i64]* @"struct.A$2$11$11", i32 0, i32 0), i64* getelementptr inbounds ([3 x i64], [3 x i64]* @"struct.A$2$11$11", i32 0, i32 2) }, { i8*, i32, i32, i32*, i32*, i8**, i64*, i64* } { i8* getelementptr inbounds ([12 x i8], [12 x i8]* @2, i32 0, i32 0), i32 8, i32 1, i32* null, i32* null, i8** null, i64* getelementptr inbounds ([2 x i64], [2 x i64]* @"union.U$1$3", i32 0, i32 0), i64* getelementptr inbounds ([2 x i64], [2 x i64]* @"union.U$1$3", i32 0, i32 1) }, { i8*, i32, i32, i32*, i32*, i8**, i64*, i64* } { i8* getelementptr inbounds ([20 x i8], [20 x i8]* @3, i32 0, i32 0), i32 32, i32 3, i32* null, i32* null, i8** null, i64* getelementptr inbounds ([4 x i64], [4 x i64]* @"struct.C$3$14$13$13", i32 0, i32 0), i64* getelementptr inbounds ([4 x i64], [4 x i64]* @"struct.C$3$14$13$13", i32 0, i32 3) }, { i8*, i32, i32, i32*, i32*, i8**, i64*, i64* } { i8* getelementptr inbounds ([20 x i8], [20 x i8]* @4, i32 0, i32 0), i32 8, i32 2, i32* null, i32* null, i8** null, i64* getelementptr inbounds ([3 x i64], [3 x i64]* @"struct.anon$2$11$11", i32 0, i32 0), i64* getelementptr inbounds ([3 x i64], [3 x i64]* @"struct.anon$2$11$11", i32 0, i32 2) }, { i8*, i32, i32, i32*, i32*, i8**, i64*, i64* } { i8* getelementptr inbounds ([15 x i8], [15 x i8]* @5, i32 0, i32 0), i32 8, i32 1, i32* null, i32* null, i8** null, i64* getelementptr inbounds ([2 x i64], [2 x i64]* @"union.anon$1$3", i32 0, i32 0), i64* getelementptr inbounds ([2 x i64], [2 x i64]* @"union.anon$1$3", i32 0, i32 1) }]
-; CHECK-NEXT:   @7 = internal constant { i8*, i32, { i8*, i32, i32, i32*, i32*, i8**, i64*, i64* }* } { i8* getelementptr inbounds ([8 x i8], [8 x i8]* @0, i32 0, i32 0), i32 5, { i8*, i32, i32, i32*, i32*, i8**, i64*, i64* }* getelementptr inbounds ([5 x { i8*, i32, i32, i32*, i32*, i8**, i64*, i64* }], [5 x { i8*, i32, i32, i32*, i32*, i8**, i64*, i64* }]* @6, i32 0, i32 0) }
-
-define i32 @main() {
-entry:
-  %a = alloca %struct.A, align 4
-  %u = alloca %union.U, align 8
-  %c = alloca [2 x %struct.C], align 16
-  %k = alloca %struct.A*, align 8
-  %x = getelementptr inbounds %struct.A, %struct.A* %a, i32 0, i32 0
-  %y = getelementptr inbounds %struct.A, %struct.A* %a, i32 0, i32 1
-  %f = bitcast %union.U* %u to float*
-  %d = bitcast %union.U* %u to double*
-  %arrayidx = getelementptr inbounds [2 x %struct.C], [2 x %struct.C]* %c, i64 0, i64 0
-  %cs = getelementptr inbounds %struct.C, %struct.C* %arrayidx, i32 0, i32 0
-  %x1 = getelementptr inbounds %struct.anon, %struct.anon* %cs, i32 0, i32 0
-  %arrayidx2 = getelementptr inbounds [2 x %struct.C], [2 x %struct.C]* %c, i64 0, i64 1
-  %cs3 = getelementptr inbounds %struct.C, %struct.C* %arrayidx2, i32 0, i32 0
-  %y4 = getelementptr inbounds %struct.anon, %struct.anon* %cs3, i32 0, i32 1
-  %arrayidx5 = getelementptr inbounds [2 x %struct.C], [2 x %struct.C]* %c, i64 0, i64 0
-  %cu = getelementptr inbounds %struct.C, %struct.C* %arrayidx5, i32 0, i32 1
-  %f6 = bitcast %union.anon* %cu to float*
-  %arrayidx7 = getelementptr inbounds [2 x %struct.C], [2 x %struct.C]* %c, i64 0, i64 1
-  %cu8 = getelementptr inbounds %struct.C, %struct.C* %arrayidx7, i32 0, i32 1
-  %d9 = bitcast %union.anon* %cu8 to double*
-  %arrayidx10 = getelementptr inbounds [2 x %struct.C], [2 x %struct.C]* %c, i64 0, i64 0
-  %c11 = getelementptr inbounds %struct.C, %struct.C* %arrayidx10, i32 0, i32 2
-  %arrayidx12 = getelementptr inbounds [10 x i8], [10 x i8]* %c11, i64 0, i64 2
-  %k1 = load %struct.A*, %struct.A** %k, align 8
-  %arrayidx13 = getelementptr inbounds %struct.A, %struct.A* %k1, i64 0
-  ret i32 0
-}
-
-; CHECK: @llvm.global_ctors = {{.*}}@esan.module_ctor
-; CHECK: @llvm.global_dtors = {{.*}}@esan.module_dtor
-
-; CHECK:        %a = alloca %struct.A, align 4
-; CHECK-NEXT:   %u = alloca %union.U, align 8
-; CHECK-NEXT:   %c = alloca [2 x %struct.C], align 16
-; CHECK-NEXT:   %k = alloca %struct.A*, align 8
-; CHECK-NEXT:   %0 = load i64, i64* getelementptr inbounds ([3 x i64], [3 x i64]* @"struct.A$2$11$11", i32 0, i32 0)
-; CHECK-NEXT:   %1 = add i64 %0, 1
-; CHECK-NEXT:   store i64 %1, i64* getelementptr inbounds ([3 x i64], [3 x i64]* @"struct.A$2$11$11", i32 0, i32 0)
-; CHECK-NEXT:   %x = getelementptr inbounds %struct.A, %struct.A* %a, i32 0, i32 0
-; CHECK-NEXT:   %2 = load i64, i64* getelementptr inbounds ([3 x i64], [3 x i64]* @"struct.A$2$11$11", i32 0, i32 1)
-; CHECK-NEXT:   %3 = add i64 %2, 1
-; CHECK-NEXT:   store i64 %3, i64* getelementptr inbounds ([3 x i64], [3 x i64]* @"struct.A$2$11$11", i32 0, i32 1)
-; CHECK-NEXT:   %y = getelementptr inbounds %struct.A, %struct.A* %a, i32 0, i32 1
-; CHECK-NEXT:   %f = bitcast %union.U* %u to float*
-; CHECK-NEXT:   %d = bitcast %union.U* %u to double*
-; CHECK-NEXT:   %4 = load i64, i64* getelementptr inbounds ([4 x i64], [4 x i64]* @"struct.C$3$14$13$13", i32 0, i32 3)
-; CHECK-NEXT:   %5 = add i64 %4, 1
-; CHECK-NEXT:   store i64 %5, i64* getelementptr inbounds ([4 x i64], [4 x i64]* @"struct.C$3$14$13$13", i32 0, i32 3)
-; CHECK-NEXT:   %arrayidx = getelementptr inbounds [2 x %struct.C], [2 x %struct.C]* %c, i64 0, i64 0
-; CHECK-NEXT:   %6 = load i64, i64* getelementptr inbounds ([4 x i64], [4 x i64]* @"struct.C$3$14$13$13", i32 0, i32 0)
-; CHECK-NEXT:   %7 = add i64 %6, 1
-; CHECK-NEXT:   store i64 %7, i64* getelementptr inbounds ([4 x i64], [4 x i64]* @"struct.C$3$14$13$13", i32 0, i32 0)
-; CHECK-NEXT:   %cs = getelementptr inbounds %struct.C, %struct.C* %arrayidx, i32 0, i32 0
-; CHECK-NEXT:   %8 = load i64, i64* getelementptr inbounds ([3 x i64], [3 x i64]* @"struct.anon$2$11$11", i32 0, i32 0)
-; CHECK-NEXT:   %9 = add i64 %8, 1
-; CHECK-NEXT:   store i64 %9, i64* getelementptr inbounds ([3 x i64], [3 x i64]* @"struct.anon$2$11$11", i32 0, i32 0)
-; CHECK-NEXT:   %x1 = getelementptr inbounds %struct.anon, %struct.anon* %cs, i32 0, i32 0
-; CHECK-NEXT:   %10 = load i64, i64* getelementptr inbounds ([4 x i64], [4 x i64]* @"struct.C$3$14$13$13", i32 0, i32 3)
-; CHECK-NEXT:   %11 = add i64 %10, 1
-; CHECK-NEXT:   store i64 %11, i64* getelementptr inbounds ([4 x i64], [4 x i64]* @"struct.C$3$14$13$13", i32 0, i32 3)
-; CHECK-NEXT:   %arrayidx2 = getelementptr inbounds [2 x %struct.C], [2 x %struct.C]* %c, i64 0, i64 1
-; CHECK-NEXT:   %12 = load i64, i64* getelementptr inbounds ([4 x i64], [4 x i64]* @"struct.C$3$14$13$13", i32 0, i32 0)
-; CHECK-NEXT:   %13 = add i64 %12, 1
-; CHECK-NEXT:   store i64 %13, i64* getelementptr inbounds ([4 x i64], [4 x i64]* @"struct.C$3$14$13$13", i32 0, i32 0)
-; CHECK-NEXT:   %cs3 = getelementptr inbounds %struct.C, %struct.C* %arrayidx2, i32 0, i32 0
-; CHECK-NEXT:   %14 = load i64, i64* getelementptr inbounds ([3 x i64], [3 x i64]* @"struct.anon$2$11$11", i32 0, i32 1)
-; CHECK-NEXT:   %15 = add i64 %14, 1
-; CHECK-NEXT:   store i64 %15, i64* getelementptr inbounds ([3 x i64], [3 x i64]* @"struct.anon$2$11$11", i32 0, i32 1)
-; CHECK-NEXT:   %y4 = getelementptr inbounds %struct.anon, %struct.anon* %cs3, i32 0, i32 1
-; CHECK-NEXT:   %16 = load i64, i64* getelementptr inbounds ([4 x i64], [4 x i64]* @"struct.C$3$14$13$13", i32 0, i32 3)
-; CHECK-NEXT:   %17 = add i64 %16, 1
-; CHECK-NEXT:   store i64 %17, i64* getelementptr inbounds ([4 x i64], [4 x i64]* @"struct.C$3$14$13$13", i32 0, i32 3)
-; CHECK-NEXT:   %arrayidx5 = getelementptr inbounds [2 x %struct.C], [2 x %struct.C]* %c, i64 0, i64 0
-; CHECK-NEXT:   %18 = load i64, i64* getelementptr inbounds ([4 x i64], [4 x i64]* @"struct.C$3$14$13$13", i32 0, i32 1)
-; CHECK-NEXT:   %19 = add i64 %18, 1
-; CHECK-NEXT:   store i64 %19, i64* getelementptr inbounds ([4 x i64], [4 x i64]* @"struct.C$3$14$13$13", i32 0, i32 1)
-; CHECK-NEXT:   %cu = getelementptr inbounds %struct.C, %struct.C* %arrayidx5, i32 0, i32 1
-; CHECK-NEXT:   %f6 = bitcast %union.anon* %cu to float*
-; CHECK-NEXT:   %20 = load i64, i64* getelementptr inbounds ([4 x i64], [4 x i64]* @"struct.C$3$14$13$13", i32 0, i32 3)
-; CHECK-NEXT:   %21 = add i64 %20, 1
-; CHECK-NEXT:   store i64 %21, i64* getelementptr inbounds ([4 x i64], [4 x i64]* @"struct.C$3$14$13$13", i32 0, i32 3)
-; CHECK-NEXT:   %arrayidx7 = getelementptr inbounds [2 x %struct.C], [2 x %struct.C]* %c, i64 0, i64 1
-; CHECK-NEXT:   %22 = load i64, i64* getelementptr inbounds ([4 x i64], [4 x i64]* @"struct.C$3$14$13$13", i32 0, i32 1)
-; CHECK-NEXT:   %23 = add i64 %22, 1
-; CHECK-NEXT:   store i64 %23, i64* getelementptr inbounds ([4 x i64], [4 x i64]* @"struct.C$3$14$13$13", i32 0, i32 1)
-; CHECK-NEXT:   %cu8 = getelementptr inbounds %struct.C, %struct.C* %arrayidx7, i32 0, i32 1
-; CHECK-NEXT:   %d9 = bitcast %union.anon* %cu8 to double*
-; CHECK-NEXT:   %24 = load i64, i64* getelementptr inbounds ([4 x i64], [4 x i64]* @"struct.C$3$14$13$13", i32 0, i32 3)
-; CHECK-NEXT:   %25 = add i64 %24, 1
-; CHECK-NEXT:   store i64 %25, i64* getelementptr inbounds ([4 x i64], [4 x i64]* @"struct.C$3$14$13$13", i32 0, i32 3)
-; CHECK-NEXT:   %arrayidx10 = getelementptr inbounds [2 x %struct.C], [2 x %struct.C]* %c, i64 0, i64 0
-; CHECK-NEXT:   %26 = load i64, i64* getelementptr inbounds ([4 x i64], [4 x i64]* @"struct.C$3$14$13$13", i32 0, i32 2)
-; CHECK-NEXT:   %27 = add i64 %26, 1
-; CHECK-NEXT:   store i64 %27, i64* getelementptr inbounds ([4 x i64], [4 x i64]* @"struct.C$3$14$13$13", i32 0, i32 2)
-; CHECK-NEXT:   %c11 = getelementptr inbounds %struct.C, %struct.C* %arrayidx10, i32 0, i32 2
-; CHECK-NEXT:   %arrayidx12 = getelementptr inbounds [10 x i8], [10 x i8]* %c11, i64 0, i64 2
-; CHECK-NEXT:   %k1 = load %struct.A*, %struct.A** %k, align 8
-; CHECK-NEXT:   %arrayidx13 = getelementptr inbounds %struct.A, %struct.A* %k1, i64 0
-; CHECK-NEXT:   ret i32 0
-
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-; Top-level:
-
-; CHECK: define internal void @esan.module_ctor()
-; CHECK: call void @__esan_init(i32 1, i8* bitcast ({ i8*, i32, { i8*, i32, i32, i32*, i32*, i8**, i64*, i64* }* }* @7 to i8*))
-; CHECK: define internal void @esan.module_dtor()
-; CHECK: call void @__esan_exit(i8* bitcast ({ i8*, i32, { i8*, i32, i32, i32*, i32*, i8**, i64*, i64* }* }* @7 to i8*))

llvm/test/Instrumentation/EfficiencySanitizer/working_set_basic.ll

-; Test basic EfficiencySanitizer working set instrumentation.
-;
-; RUN: opt < %s -esan -esan-working-set -S | FileCheck %s
-
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-; Intra-cache-line
-
-define i8 @aligned1(i8* %a) {
-entry:
-  %tmp1 = load i8, i8* %a, align 1
-  ret i8 %tmp1
-; CHECK: @llvm.global_ctors = {{.*}}@esan.module_ctor
-; CHECK:        %0 = ptrtoint i8* %a to i64
-; CHECK-NEXT:   %1 = and i64 %0, 17592186044415
-; CHECK-NEXT:   %2 = add i64 %1, 1337006139375616
-; CHECK-NEXT:   %3 = lshr i64 %2, 6
-; CHECK-NEXT:   %4 = inttoptr i64 %3 to i8*
-; CHECK-NEXT:   %5 = load i8, i8* %4
-; CHECK-NEXT:   %6 = and i8 %5, -127
-; CHECK-NEXT:   %7 = icmp ne i8 %6, -127
-; CHECK-NEXT:   br i1 %7, label %8, label %11
-; CHECK:        %9 = or i8 %5, -127
-; CHECK-NEXT:   %10 = inttoptr i64 %3 to i8*
-; CHECK-NEXT:   store i8 %9, i8* %10
-; CHECK-NEXT:   br label %11
-; CHECK:        %tmp1 = load i8, i8* %a, align 1
-; CHECK-NEXT:   ret i8 %tmp1
-}
-
-define i16 @aligned2(i16* %a) {
-entry:
-  %tmp1 = load i16, i16* %a, align 2
-  ret i16 %tmp1
-; CHECK:        %0 = ptrtoint i16* %a to i64
-; CHECK-NEXT:   %1 = and i64 %0, 17592186044415
-; CHECK-NEXT:   %2 = add i64 %1, 1337006139375616
-; CHECK-NEXT:   %3 = lshr i64 %2, 6
-; CHECK-NEXT:   %4 = inttoptr i64 %3 to i8*
-; CHECK-NEXT:   %5 = load i8, i8* %4
-; CHECK-NEXT:   %6 = and i8 %5, -127
-; CHECK-NEXT:   %7 = icmp ne i8 %6, -127
-; CHECK-NEXT:   br i1 %7, label %8, label %11
-; CHECK:        %9 = or i8 %5, -127
-; CHECK-NEXT:   %10 = inttoptr i64 %3 to i8*
-; CHECK-NEXT:   store i8 %9, i8* %10
-; CHECK-NEXT:   br label %11
-; CHECK:        %tmp1 = load i16, i16* %a, align 2
-; CHECK-NEXT:   ret i16 %tmp1
-}
-
-define i32 @aligned4(i32* %a) {
-entry:
-  %tmp1 = load i32, i32* %a, align 4
-  ret i32 %tmp1
-; CHECK:        %0 = ptrtoint i32* %a to i64
-; CHECK-NEXT:   %1 = and i64 %0, 17592186044415
-; CHECK-NEXT:   %2 = add i64 %1, 1337006139375616
-; CHECK-NEXT:   %3 = lshr i64 %2, 6
-; CHECK-NEXT:   %4 = inttoptr i64 %3 to i8*
-; CHECK-NEXT:   %5 = load i8, i8* %4
-; CHECK-NEXT:   %6 = and i8 %5, -127
-; CHECK-NEXT:   %7 = icmp ne i8 %6, -127
-; CHECK-NEXT:   br i1 %7, label %8, label %11
-; CHECK:        %9 = or i8 %5, -127
-; CHECK-NEXT:   %10 = inttoptr i64 %3 to i8*
-; CHECK-NEXT:   store i8 %9, i8* %10
-; CHECK-NEXT:   br label %11
-; CHECK:        %tmp1 = load i32, i32* %a, align 4
-; CHECK-NEXT:   ret i32 %tmp1
-}
-
-define i64 @aligned8(i64* %a) {
-entry:
-  %tmp1 = load i64, i64* %a, align 8
-  ret i64 %tmp1
-; CHECK:        %0 = ptrtoint i64* %a to i64
-; CHECK-NEXT:   %1 = and i64 %0, 17592186044415
-; CHECK-NEXT:   %2 = add i64 %1, 1337006139375616
-; CHECK-NEXT:   %3 = lshr i64 %2, 6
-; CHECK-NEXT:   %4 = inttoptr i64 %3 to i8*
-; CHECK-NEXT:   %5 = load i8, i8* %4
-; CHECK-NEXT:   %6 = and i8 %5, -127
-; CHECK-NEXT:   %7 = icmp ne i8 %6, -127
-; CHECK-NEXT:   br i1 %7, label %8, label %11
-; CHECK:        %9 = or i8 %5, -127
-; CHECK-NEXT:   %10 = inttoptr i64 %3 to i8*
-; CHECK-NEXT:   store i8 %9, i8* %10
-; CHECK-NEXT:   br label %11
-; CHECK:        %tmp1 = load i64, i64* %a, align 8
-; CHECK-NEXT:   ret i64 %tmp1
-}
-
-define i128 @aligned16(i128* %a) {
-entry:
-  %tmp1 = load i128, i128* %a, align 16
-  ret i128 %tmp1
-; CHECK:        %0 = ptrtoint i128* %a to i64
-; CHECK-NEXT:   %1 = and i64 %0, 17592186044415
-; CHECK-NEXT:   %2 = add i64 %1, 1337006139375616
-; CHECK-NEXT:   %3 = lshr i64 %2, 6
-; CHECK-NEXT:   %4 = inttoptr i64 %3 to i8*
-; CHECK-NEXT:   %5 = load i8, i8* %4
-; CHECK-NEXT:   %6 = and i8 %5, -127
-; CHECK-NEXT:   %7 = icmp ne i8 %6, -127
-; CHECK-NEXT:   br i1 %7, label %8, label %11
-; CHECK:        %9 = or i8 %5, -127
-; CHECK-NEXT:   %10 = inttoptr i64 %3 to i8*
-; CHECK-NEXT:   store i8 %9, i8* %10
-; CHECK-NEXT:   br label %11
-; CHECK:        %tmp1 = load i128, i128* %a, align 16
-; CHECK-NEXT:   ret i128 %tmp1
-}
-
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-; Not guaranteed to be intra-cache-line, but our defaults are to
-; assume they are:
-
-define i16 @unaligned2(i16* %a) {
-entry:
-  %tmp1 = load i16, i16* %a, align 1
-  ret i16 %tmp1
-; CHECK:        %0 = ptrtoint i16* %a to i64
-; CHECK-NEXT:   %1 = and i64 %0, 17592186044415
-; CHECK-NEXT:   %2 = add i64 %1, 1337006139375616
-; CHECK-NEXT:   %3 = lshr i64 %2, 6
-; CHECK-NEXT:   %4 = inttoptr i64 %3 to i8*
-; CHECK-NEXT:   %5 = load i8, i8* %4
-; CHECK-NEXT:   %6 = and i8 %5, -127
-; CHECK-NEXT:   %7 = icmp ne i8 %6, -127
-; CHECK-NEXT:   br i1 %7, label %8, label %11
-; CHECK:        %9 = or i8 %5, -127
-; CHECK-NEXT:   %10 = inttoptr i64 %3 to i8*
-; CHECK-NEXT:   store i8 %9, i8* %10
-; CHECK-NEXT:   br label %11
-; CHECK:        %tmp1 = load i16, i16* %a, align 1
-; CHECK-NEXT:   ret i16 %tmp1
-}
-
-define i32 @unaligned4(i32* %a) {
-entry:
-  %tmp1 = load i32, i32* %a, align 2
-  ret i32 %tmp1
-; CHECK:        %0 = ptrtoint i32* %a to i64
-; CHECK-NEXT:   %1 = and i64 %0, 17592186044415
-; CHECK-NEXT:   %2 = add i64 %1, 1337006139375616
-; CHECK-NEXT:   %3 = lshr i64 %2, 6
-; CHECK-NEXT:   %4 = inttoptr i64 %3 to i8*
-; CHECK-NEXT:   %5 = load i8, i8* %4
-; CHECK-NEXT:   %6 = and i8 %5, -127
-; CHECK-NEXT:   %7 = icmp ne i8 %6, -127
-; CHECK-NEXT:   br i1 %7, label %8, label %11
-; CHECK:        %9 = or i8 %5, -127
-; CHECK-NEXT:   %10 = inttoptr i64 %3 to i8*
-; CHECK-NEXT:   store i8 %9, i8* %10
-; CHECK-NEXT:   br label %11
-; CHECK:        %tmp1 = load i32, i32* %a, align 2
-; CHECK-NEXT:   ret i32 %tmp1
-}
-
-define i64 @unaligned8(i64* %a) {
-entry:
-  %tmp1 = load i64, i64* %a, align 4
-  ret i64 %tmp1
-; CHECK:        %0 = ptrtoint i64* %a to i64
-; CHECK-NEXT:   %1 = and i64 %0, 17592186044415
-; CHECK-NEXT:   %2 = add i64 %1, 1337006139375616
-; CHECK-NEXT:   %3 = lshr i64 %2, 6
-; CHECK-NEXT:   %4 = inttoptr i64 %3 to i8*
-; CHECK-NEXT:   %5 = load i8, i8* %4
-; CHECK-NEXT:   %6 = and i8 %5, -127
-; CHECK-NEXT:   %7 = icmp ne i8 %6, -127
-; CHECK-NEXT:   br i1 %7, label %8, label %11
-; CHECK:        %9 = or i8 %5, -127
-; CHECK-NEXT:   %10 = inttoptr i64 %3 to i8*
-; CHECK-NEXT:   store i8 %9, i8* %10
-; CHECK-NEXT:   br label %11
-; CHECK:        %tmp1 = load i64, i64* %a, align 4
-; CHECK-NEXT:   ret i64 %tmp1
-}
-
-define i128 @unaligned16(i128* %a) {
-entry:
-  %tmp1 = load i128, i128* %a, align 8
-  ret i128 %tmp1
-; CHECK:        %0 = ptrtoint i128* %a to i64
-; CHECK-NEXT:   %1 = and i64 %0, 17592186044415
-; CHECK-NEXT:   %2 = add i64 %1, 1337006139375616
-; CHECK-NEXT:   %3 = lshr i64 %2, 6
-; CHECK-NEXT:   %4 = inttoptr i64 %3 to i8*
-; CHECK-NEXT:   %5 = load i8, i8* %4
-; CHECK-NEXT:   %6 = and i8 %5, -127
-; CHECK-NEXT:   %7 = icmp ne i8 %6, -127
-; CHECK-NEXT:   br i1 %7, label %8, label %11
-; CHECK:        %9 = or i8 %5, -127
-; CHECK-NEXT:   %10 = inttoptr i64 %3 to i8*
-; CHECK-NEXT:   store i8 %9, i8* %10
-; CHECK-NEXT:   br label %11
-; CHECK:        %tmp1 = load i128, i128* %a, align 8
-; CHECK-NEXT:   ret i128 %tmp1
-}
-
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-; Ensure that esan converts intrinsics to calls:
-
-declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i1)
-declare void @llvm.memmove.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i1)
-declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i1)
-
-define void @memCpyTest(i8* nocapture %x, i8* nocapture %y) {
-entry:
-    tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 4 %x, i8* align 4 %y, i64 16, i1 false)
-    ret void
-; CHECK: define void @memCpyTest
-; CHECK: call i8* @memcpy
-; CHECK: ret void
-}
-
-define void @memMoveTest(i8* nocapture %x, i8* nocapture %y) {
-entry:
-    tail call void @llvm.memmove.p0i8.p0i8.i64(i8* align 4 %x, i8* align 4 %y, i64 16, i1 false)
-    ret void
-; CHECK: define void @memMoveTest
-; CHECK: call i8* @memmove
-; CHECK: ret void
-}
-
-define void @memSetTest(i8* nocapture %x) {
-entry:
-    tail call void @llvm.memset.p0i8.i64(i8* align 4 %x, i8 77, i64 16, i1 false)
-    ret void
-; CHECK: define void @memSetTest
-; CHECK: call i8* @memset
-; CHECK: ret void
-}
-
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-; Ensure that esan doesn't convert element atomic memory intrinsics to
-; calls.
-
-declare void @llvm.memset.element.unordered.atomic.p0i8.i64(i8* nocapture writeonly, i8, i64, i32) nounwind
-declare void @llvm.memmove.element.unordered.atomic.p0i8.p0i8.i64(i8* nocapture writeonly, i8* nocapture readonly, i64, i32) nounwind
-declare void @llvm.memcpy.element.unordered.atomic.p0i8.p0i8.i64(i8* nocapture writeonly, i8* nocapture readonly, i64, i32) nounwind
-
-define void @elementAtomic_memCpyTest(i8* nocapture %x, i8* nocapture %y) {
-  ; CHECK-LABEL: elementAtomic_memCpyTest
-  ; CHECK-NEXT: tail call void @llvm.memcpy.element.unordered.atomic.p0i8.p0i8.i64(i8* align 1 %x, i8* align 1 %y, i64 16, i32 1)
-  ; CHECK-NEXT: ret void
-  tail call void @llvm.memcpy.element.unordered.atomic.p0i8.p0i8.i64(i8* align 1 %x, i8* align 1 %y, i64 16, i32 1)
-  ret void
-}
-
-define void @elementAtomic_memMoveTest(i8* nocapture %x, i8* nocapture %y) {
-  ; CHECK-LABEL: elementAtomic_memMoveTest
-  ; CHECK-NEXT:  tail call void @llvm.memmove.element.unordered.atomic.p0i8.p0i8.i64(i8* align 1 %x, i8* align 1 %y, i64 16, i32 1)
-  ; CHECK-NEXT: ret void
-  tail call void @llvm.memmove.element.unordered.atomic.p0i8.p0i8.i64(i8* align 1 %x, i8* align 1 %y, i64 16, i32 1)
-  ret void
-}
-
-define void @elementAtomic_memSetTest(i8* nocapture %x) {
-  ; CHECK-LABEL: elementAtomic_memSetTest
-  ; CHECK-NEXT: tail call void @llvm.memset.element.unordered.atomic.p0i8.i64(i8* align 1 %x, i8 77, i64 16, i32 1)
-  ; CHECK-NEXT: ret void
-  tail call void @llvm.memset.element.unordered.atomic.p0i8.i64(i8* align 1 %x, i8 77, i64 16, i32 1)
-  ret void
-}
-
-
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-; Top-level:
-
-; CHECK: define internal void @esan.module_ctor()
-; CHECK: call void @__esan_init(i32 2, i8* null)
-; CHECK: define internal void @esan.module_dtor()
-; CHECK: call void @__esan_exit(i8* null)

llvm/test/Instrumentation/EfficiencySanitizer/working_set_slow.ll

-; Test basic EfficiencySanitizer slowpath instrumentation.
-;
-; RUN: opt < %s -esan -esan-working-set -esan-instrument-fastpath=false -S | FileCheck %s
-
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-; Aligned loads:
-
-define i8 @loadAligned1(i8* %a) {
-entry:
-  %tmp1 = load i8, i8* %a, align 1
-  ret i8 %tmp1
-; CHECK: @llvm.global_ctors = {{.*}}@esan.module_ctor
-; CHECK:        call void @__esan_aligned_load1(i8* %a)
-; CHECK-NEXT:   %tmp1 = load i8, i8* %a, align 1
-; CHECK-NEXT:   ret i8 %tmp1
-}
-
-define i16 @loadAligned2(i16* %a) {
-entry:
-  %tmp1 = load i16, i16* %a, align 2
-  ret i16 %tmp1
-; CHECK:        %0 = bitcast i16* %a to i8*
-; CHECK-NEXT:   call void @__esan_aligned_load2(i8* %0)
-; CHECK-NEXT:   %tmp1 = load i16, i16* %a, align 2
-; CHECK-NEXT:   ret i16 %tmp1
-}
-
-define i32 @loadAligned4(i32* %a) {
-entry:
-  %tmp1 = load i32, i32* %a, align 4
-  ret i32 %tmp1
-; CHECK:        %0 = bitcast i32* %a to i8*
-; CHECK-NEXT:   call void @__esan_aligned_load4(i8* %0)
-; CHECK-NEXT:   %tmp1 = load i32, i32* %a, align 4
-; CHECK-NEXT:   ret i32 %tmp1
-}
-
-define i64 @loadAligned8(i64* %a) {
-entry:
-  %tmp1 = load i64, i64* %a, align 8
-  ret i64 %tmp1
-; CHECK:        %0 = bitcast i64* %a to i8*
-; CHECK-NEXT:   call void @__esan_aligned_load8(i8* %0)
-; CHECK-NEXT:   %tmp1 = load i64, i64* %a, align 8
-; CHECK-NEXT:   ret i64 %tmp1
-}
-
-define i128 @loadAligned16(i128* %a) {
-entry:
-  %tmp1 = load i128, i128* %a, align 16
-  ret i128 %tmp1
-; CHECK:        %0 = bitcast i128* %a to i8*
-; CHECK-NEXT:   call void @__esan_aligned_load16(i8* %0)
-; CHECK-NEXT:   %tmp1 = load i128, i128* %a, align 16
-; CHECK-NEXT:   ret i128 %tmp1
-}
-
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-; Aligned stores:
-
-define void @storeAligned1(i8* %a) {
-entry:
-  store i8 1, i8* %a, align 1
-  ret void
-; CHECK:        call void @__esan_aligned_store1(i8* %a)
-; CHECK-NEXT:   store i8 1, i8* %a, align 1
-; CHECK-NEXT:   ret void
-}
-
-define void @storeAligned2(i16* %a) {
-entry:
-  store i16 1, i16* %a, align 2
-  ret void
-; CHECK:        %0 = bitcast i16* %a to i8*
-; CHECK-NEXT:   call void @__esan_aligned_store2(i8* %0)
-; CHECK-NEXT:   store i16 1, i16* %a, align 2
-; CHECK-NEXT:   ret void
-}
-
-define void @storeAligned4(i32* %a) {
-entry:
-  store i32 1, i32* %a, align 4
-  ret void
-; CHECK:        %0 = bitcast i32* %a to i8*
-; CHECK-NEXT:   call void @__esan_aligned_store4(i8* %0)
-; CHECK-NEXT:   store i32 1, i32* %a, align 4
-; CHECK-NEXT:   ret void
-}
-
-define void @storeAligned8(i64* %a) {
-entry:
-  store i64 1, i64* %a, align 8
-  ret void
-; CHECK:        %0 = bitcast i64* %a to i8*
-; CHECK-NEXT:   call void @__esan_aligned_store8(i8* %0)
-; CHECK-NEXT:   store i64 1, i64* %a, align 8
-; CHECK-NEXT:   ret void
-}
-
-define void @storeAligned16(i128* %a) {
-entry:
-  store i128 1, i128* %a, align 16
-  ret void
-; CHECK:        %0 = bitcast i128* %a to i8*
-; CHECK-NEXT:   call void @__esan_aligned_store16(i8* %0)
-; CHECK-NEXT:   store i128 1, i128* %a, align 16
-; CHECK-NEXT:   ret void
-}
-
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-; Unaligned loads:
-
-define i16 @loadUnaligned2(i16* %a) {
-entry:
-  %tmp1 = load i16, i16* %a, align 1
-  ret i16 %tmp1
-; CHECK:        %0 = bitcast i16* %a to i8*
-; CHECK-NEXT:   call void @__esan_unaligned_load2(i8* %0)
-; CHECK-NEXT:   %tmp1 = load i16, i16* %a, align 1
-; CHECK-NEXT:   ret i16 %tmp1
-}
-
-define i32 @loadUnaligned4(i32* %a) {
-entry:
-  %tmp1 = load i32, i32* %a, align 1
-  ret i32 %tmp1
-; CHECK:        %0 = bitcast i32* %a to i8*
-; CHECK-NEXT:   call void @__esan_unaligned_load4(i8* %0)
-; CHECK-NEXT:   %tmp1 = load i32, i32* %a, align 1
-; CHECK-NEXT:   ret i32 %tmp1
-}
-
-define i64 @loadUnaligned8(i64* %a) {
-entry:
-  %tmp1 = load i64, i64* %a, align 1
-  ret i64 %tmp1
-; CHECK:        %0 = bitcast i64* %a to i8*
-; CHECK-NEXT:   call void @__esan_unaligned_load8(i8* %0)
-; CHECK-NEXT:   %tmp1 = load i64, i64* %a, align 1
-; CHECK-NEXT:   ret i64 %tmp1
-}
-
-define i128 @loadUnaligned16(i128* %a) {
-entry:
-  %tmp1 = load i128, i128* %a, align 1
-  ret i128 %tmp1
-; CHECK:        %0 = bitcast i128* %a to i8*
-; CHECK-NEXT:   call void @__esan_unaligned_load16(i8* %0)
-; CHECK-NEXT:   %tmp1 = load i128, i128* %a, align 1
-; CHECK-NEXT:   ret i128 %tmp1
-}
-
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-; Unaligned stores:
-
-define void @storeUnaligned2(i16* %a) {
-entry:
-  store i16 1, i16* %a, align 1
-  ret void
-; CHECK:        %0 = bitcast i16* %a to i8*
-; CHECK-NEXT:   call void @__esan_unaligned_store2(i8* %0)
-; CHECK-NEXT:   store i16 1, i16* %a, align 1
-; CHECK-NEXT:   ret void
-}
-
-define void @storeUnaligned4(i32* %a) {
-entry:
-  store i32 1, i32* %a, align 1
-  ret void
-; CHECK:        %0 = bitcast i32* %a to i8*
-; CHECK-NEXT:   call void @__esan_unaligned_store4(i8* %0)
-; CHECK-NEXT:   store i32 1, i32* %a, align 1
-; CHECK-NEXT:   ret void
-}
-
-define void @storeUnaligned8(i64* %a) {
-entry:
-  store i64 1, i64* %a, align 1
-  ret void
-; CHECK:        %0 = bitcast i64* %a to i8*
-; CHECK-NEXT:   call void @__esan_unaligned_store8(i8* %0)
-; CHECK-NEXT:   store i64 1, i64* %a, align 1
-; CHECK-NEXT:   ret void
-}
-
-define void @storeUnaligned16(i128* %a) {
-entry:
-  store i128 1, i128* %a, align 1
-  ret void
-; CHECK:        %0 = bitcast i128* %a to i8*
-; CHECK-NEXT:   call void @__esan_unaligned_store16(i8* %0)
-; CHECK-NEXT:   store i128 1, i128* %a, align 1
-; CHECK-NEXT:   ret void
-}
-
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-; Unusual loads and stores:
-
-define x86_fp80 @loadUnalignedFP(x86_fp80* %a) {
-entry:
-  %tmp1 = load x86_fp80, x86_fp80* %a, align 1
-  ret x86_fp80 %tmp1
-; CHECK:        %0 = bitcast x86_fp80* %a to i8*
-; CHECK-NEXT:   call void @__esan_unaligned_loadN(i8* %0, i64 10)
-; CHECK-NEXT:   %tmp1 = load x86_fp80, x86_fp80* %a, align 1
-; CHECK-NEXT:   ret x86_fp80 %tmp1
-}
-
-define void @storeUnalignedFP(x86_fp80* %a) {
-entry:
-  store x86_fp80 0xK00000000000000000000, x86_fp80* %a, align 1
-  ret void
-; CHECK:        %0 = bitcast x86_fp80* %a to i8*
-; CHECK-NEXT:   call void @__esan_unaligned_storeN(i8* %0, i64 10)
-; CHECK-NEXT:   store x86_fp80 0xK00000000000000000000, x86_fp80* %a, align 1
-; CHECK-NEXT:   ret void
-}
-
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-; Ensure that esan converts memcpy intrinsics to calls:
-
-declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i1)
-declare void @llvm.memmove.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i1)
-declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i1)
-
-define void @memCpyTest(i8* nocapture %x, i8* nocapture %y) {
-entry:
-    tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 4 %x, i8* align 4 %y, i64 16, i1 false)
-    ret void
-; CHECK: define void @memCpyTest
-; CHECK: call i8* @memcpy
-; CHECK: ret void
-}
-
-define void @memMoveTest(i8* nocapture %x, i8* nocapture %y) {
-entry:
-    tail call void @llvm.memmove.p0i8.p0i8.i64(i8* align 4 %x, i8* align 4 %y, i64 16, i1 false)
-    ret void
-; CHECK: define void @memMoveTest
-; CHECK: call i8* @memmove
-; CHECK: ret void
-}
-
-define void @memSetTest(i8* nocapture %x) {
-entry:
-    tail call void @llvm.memset.p0i8.i64(i8* align 4 %x, i8 77, i64 16, i1 false)
-    ret void
-; CHECK: define void @memSetTest
-; CHECK: call i8* @memset
-; CHECK: ret void
-}
-
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-; Ensure that esan doesn't convert element atomic memory intrinsics to
-; calls.
-
-declare void @llvm.memset.element.unordered.atomic.p0i8.i64(i8* nocapture writeonly, i8, i64, i32) nounwind
-declare void @llvm.memmove.element.unordered.atomic.p0i8.p0i8.i64(i8* nocapture writeonly, i8* nocapture readonly, i64, i32) nounwind
-declare void @llvm.memcpy.element.unordered.atomic.p0i8.p0i8.i64(i8* nocapture writeonly, i8* nocapture readonly, i64, i32) nounwind
-
-define void @elementAtomic_memCpyTest(i8* nocapture %x, i8* nocapture %y) {
-  ; CHECK-LABEL: elementAtomic_memCpyTest
-  ; CHECK-NEXT: tail call void @llvm.memcpy.element.unordered.atomic.p0i8.p0i8.i64(i8* align 1 %x, i8* align 1 %y, i64 16, i32 1)
-  ; CHECK-NEXT: ret void
-  tail call void @llvm.memcpy.element.unordered.atomic.p0i8.p0i8.i64(i8* align 1 %x, i8* align 1 %y, i64 16, i32 1)
-  ret void
-}
-
-define void @elementAtomic_memMoveTest(i8* nocapture %x, i8* nocapture %y) {
-  ; CHECK-LABEL: elementAtomic_memMoveTest
-  ; CHECK-NEXT:  tail call void @llvm.memmove.element.unordered.atomic.p0i8.p0i8.i64(i8* align 1 %x, i8* align 1 %y, i64 16, i32 1)
-  ; CHECK-NEXT: ret void
-  tail call void @llvm.memmove.element.unordered.atomic.p0i8.p0i8.i64(i8* align 1 %x, i8* align 1 %y, i64 16, i32 1)
-  ret void
-}
-
-define void @elementAtomic_memSetTest(i8* nocapture %x) {
-  ; CHECK-LABEL: elementAtomic_memSetTest
-  ; CHECK-NEXT: tail call void @llvm.memset.element.unordered.atomic.p0i8.i64(i8* align 1 %x, i8 77, i64 16, i32 1)
-  ; CHECK-NEXT: ret void
-  tail call void @llvm.memset.element.unordered.atomic.p0i8.i64(i8* align 1 %x, i8 77, i64 16, i32 1)
-  ret void
-}
-
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-; Top-level:
-
-; CHECK: define internal void @esan.module_ctor()
-; CHECK: call void @__esan_init(i32 2, i8* null)
-; CHECK: define internal void @esan.module_dtor()
-; CHECK: call void @__esan_exit(i8* null)

llvm/test/Instrumentation/EfficiencySanitizer/working_set_strict.ll

-; Test EfficiencySanitizer working set instrumentation without aggressive
-; optimization flags.
-;
-; RUN: opt < %s -esan -esan-working-set -esan-assume-intra-cache-line=0 -S | FileCheck %s
-
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-; Intra-cache-line
-
-define i8 @aligned1(i8* %a) {
-entry:
-  %tmp1 = load i8, i8* %a, align 1
-  ret i8 %tmp1
-; CHECK: @llvm.global_ctors = {{.*}}@esan.module_ctor
-; CHECK:        %0 = ptrtoint i8* %a to i64
-; CHECK-NEXT:   %1 = and i64 %0, 17592186044415
-; CHECK-NEXT:   %2 = add i64 %1, 1337006139375616
-; CHECK-NEXT:   %3 = lshr i64 %2, 6
-; CHECK-NEXT:   %4 = inttoptr i64 %3 to i8*
-; CHECK-NEXT:   %5 = load i8, i8* %4
-; CHECK-NEXT:   %6 = and i8 %5, -127
-; CHECK-NEXT:   %7 = icmp ne i8 %6, -127
-; CHECK-NEXT:   br i1 %7, label %8, label %11
-; CHECK:        %9 = or i8 %5, -127
-; CHECK-NEXT:   %10 = inttoptr i64 %3 to i8*
-; CHECK-NEXT:   store i8 %9, i8* %10
-; CHECK-NEXT:   br label %11
-; CHECK:        %tmp1 = load i8, i8* %a, align 1
-; CHECK-NEXT:   ret i8 %tmp1
-}
-
-define i16 @aligned2(i16* %a) {
-entry:
-  %tmp1 = load i16, i16* %a, align 2
-  ret i16 %tmp1
-; CHECK:        %0 = ptrtoint i16* %a to i64
-; CHECK-NEXT:   %1 = and i64 %0, 17592186044415
-; CHECK-NEXT:   %2 = add i64 %1, 1337006139375616
-; CHECK-NEXT:   %3 = lshr i64 %2, 6
-; CHECK-NEXT:   %4 = inttoptr i64 %3 to i8*
-; CHECK-NEXT:   %5 = load i8, i8* %4
-; CHECK-NEXT:   %6 = and i8 %5, -127
-; CHECK-NEXT:   %7 = icmp ne i8 %6, -127
-; CHECK-NEXT:   br i1 %7, label %8, label %11
-; CHECK:        %9 = or i8 %5, -127
-; CHECK-NEXT:   %10 = inttoptr i64 %3 to i8*
-; CHECK-NEXT:   store i8 %9, i8* %10
-; CHECK-NEXT:   br label %11
-; CHECK:        %tmp1 = load i16, i16* %a, align 2
-; CHECK-NEXT:   ret i16 %tmp1
-}
-
-define i32 @aligned4(i32* %a) {
-entry:
-  %tmp1 = load i32, i32* %a, align 4
-  ret i32 %tmp1
-; CHECK:        %0 = ptrtoint i32* %a to i64
-; CHECK-NEXT:   %1 = and i64 %0, 17592186044415
-; CHECK-NEXT:   %2 = add i64 %1, 1337006139375616
-; CHECK-NEXT:   %3 = lshr i64 %2, 6
-; CHECK-NEXT:   %4 = inttoptr i64 %3 to i8*
-; CHECK-NEXT:   %5 = load i8, i8* %4
-; CHECK-NEXT:   %6 = and i8 %5, -127
-; CHECK-NEXT:   %7 = icmp ne i8 %6, -127
-; CHECK-NEXT:   br i1 %7, label %8, label %11
-; CHECK:        %9 = or i8 %5, -127
-; CHECK-NEXT:   %10 = inttoptr i64 %3 to i8*
-; CHECK-NEXT:   store i8 %9, i8* %10
-; CHECK-NEXT:   br label %11
-; CHECK:        %tmp1 = load i32, i32* %a, align 4
-; CHECK-NEXT:   ret i32 %tmp1
-}
-
-define i64 @aligned8(i64* %a) {
-entry:
-  %tmp1 = load i64, i64* %a, align 8
-  ret i64 %tmp1
-; CHECK:        %0 = ptrtoint i64* %a to i64
-; CHECK-NEXT:   %1 = and i64 %0, 17592186044415
-; CHECK-NEXT:   %2 = add i64 %1, 1337006139375616
-; CHECK-NEXT:   %3 = lshr i64 %2, 6
-; CHECK-NEXT:   %4 = inttoptr i64 %3 to i8*
-; CHECK-NEXT:   %5 = load i8, i8* %4
-; CHECK-NEXT:   %6 = and i8 %5, -127
-; CHECK-NEXT:   %7 = icmp ne i8 %6, -127
-; CHECK-NEXT:   br i1 %7, label %8, label %11
-; CHECK:        %9 = or i8 %5, -127
-; CHECK-NEXT:   %10 = inttoptr i64 %3 to i8*
-; CHECK-NEXT:   store i8 %9, i8* %10
-; CHECK-NEXT:   br label %11
-; CHECK:        %tmp1 = load i64, i64* %a, align 8
-; CHECK-NEXT:   ret i64 %tmp1
-}
-
-define i128 @aligned16(i128* %a) {
-entry:
-  %tmp1 = load i128, i128* %a, align 16
-  ret i128 %tmp1
-; CHECK:        %0 = ptrtoint i128* %a to i64
-; CHECK-NEXT:   %1 = and i64 %0, 17592186044415
-; CHECK-NEXT:   %2 = add i64 %1, 1337006139375616
-; CHECK-NEXT:   %3 = lshr i64 %2, 6
-; CHECK-NEXT:   %4 = inttoptr i64 %3 to i8*
-; CHECK-NEXT:   %5 = load i8, i8* %4
-; CHECK-NEXT:   %6 = and i8 %5, -127
-; CHECK-NEXT:   %7 = icmp ne i8 %6, -127
-; CHECK-NEXT:   br i1 %7, label %8, label %11
-; CHECK:        %9 = or i8 %5, -127
-; CHECK-NEXT:   %10 = inttoptr i64 %3 to i8*
-; CHECK-NEXT:   store i8 %9, i8* %10
-; CHECK-NEXT:   br label %11
-; CHECK:        %tmp1 = load i128, i128* %a, align 16
-; CHECK-NEXT:   ret i128 %tmp1
-}
-
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-; Not guaranteed to be intra-cache-line
-
-define i16 @unaligned2(i16* %a) {
-entry:
-  %tmp1 = load i16, i16* %a, align 1
-  ret i16 %tmp1
-; CHECK:        %0 = bitcast i16* %a to i8*
-; CHECK-NEXT:   call void @__esan_unaligned_load2(i8* %0)
-; CHECK-NEXT:   %tmp1 = load i16, i16* %a, align 1
-; CHECK-NEXT:   ret i16 %tmp1
-}
-
-define i32 @unaligned4(i32* %a) {
-entry:
-  %tmp1 = load i32, i32* %a, align 2
-  ret i32 %tmp1
-; CHECK:        %0 = bitcast i32* %a to i8*
-; CHECK-NEXT:   call void @__esan_unaligned_load4(i8* %0)
-; CHECK-NEXT:   %tmp1 = load i32, i32* %a, align 2
-; CHECK-NEXT:   ret i32 %tmp1
-}
-
-define i64 @unaligned8(i64* %a) {
-entry:
-  %tmp1 = load i64, i64* %a, align 4
-  ret i64 %tmp1
-; CHECK:        %0 = bitcast i64* %a to i8*
-; CHECK-NEXT:   call void @__esan_unaligned_load8(i8* %0)
-; CHECK-NEXT:   %tmp1 = load i64, i64* %a, align 4
-; CHECK-NEXT:   ret i64 %tmp1
-}
-
-define i128 @unaligned16(i128* %a) {
-entry:
-  %tmp1 = load i128, i128* %a, align 8
-  ret i128 %tmp1
-; CHECK:        %0 = bitcast i128* %a to i8*
-; CHECK-NEXT:   call void @__esan_unaligned_load16(i8* %0)
-; CHECK-NEXT:   %tmp1 = load i128, i128* %a, align 8
-; CHECK-NEXT:   ret i128 %tmp1
-}

llvm/utils/gn/secondary/compiler-rt/include/BUILD.gn

 import("//clang/resource_dir.gni")
 
 copy("include") {
   sources = [
     "sanitizer/allocator_interface.h",
     "sanitizer/asan_interface.h",
     "sanitizer/common_interface_defs.h",
     "sanitizer/coverage_interface.h",
     "sanitizer/dfsan_interface.h",
-    "sanitizer/esan_interface.h",
     "sanitizer/hwasan_interface.h",
     "sanitizer/linux_syscall_hooks.h",
     "sanitizer/lsan_interface.h",
     "sanitizer/msan_interface.h",
     "sanitizer/netbsd_syscall_hooks.h",
     "sanitizer/scudo_interface.h",
     "sanitizer/tsan_interface.h",
     "sanitizer/tsan_interface_atomic.h",
     "xray/xray_interface.h",
     "xray/xray_log_interface.h",
     "xray/xray_records.h",
   ]
   outputs = [
     "$clang_resource_dir/include/{{source_target_relative}}",
   ]
 }

llvm/utils/gn/secondary/compiler-rt/lib/sanitizer_common/BUILD.gn

sources = [
     "sanitizer_unwind_win.cc",
     "sanitizer_vector.h",
     "sanitizer_win.cc",
     "sanitizer_win.h",
     "sanitizer_win_defs.h",
     "sanitizer_win_dll_thunk.h",
     "sanitizer_win_weak_interception.h",
   ]
-  if (current_cpu == "x64") {
-    sources += [ "sanitizer_linux_x86_64.S" ]
-  }
 }

llvm/utils/gn/secondary/llvm/lib/Transforms/Instrumentation/BUILD.gn

 static_library("Instrumentation") {
   output_name = "LLVMInstrumentation"
   deps = [
     "//llvm/lib/Analysis",
     "//llvm/lib/IR",
     "//llvm/lib/MC",
     "//llvm/lib/ProfileData",
     "//llvm/lib/Support",
     "//llvm/lib/Transforms/Utils",
   ]
   sources = [
     "AddressSanitizer.cpp",
     "BoundsChecking.cpp",
     "CGProfile.cpp",
     "ControlHeightReduction.cpp",
     "DataFlowSanitizer.cpp",
-    "EfficiencySanitizer.cpp",
     "GCOVProfiling.cpp",
     "HWAddressSanitizer.cpp",
     "IndirectCallPromotion.cpp",
     "InstrOrderFile.cpp",
     "InstrProfiling.cpp",
     "Instrumentation.cpp",
     "MemorySanitizer.cpp",
     "PGOInstrumentation.cpp",
     "PGOMemOPSizeOpt.cpp",
     "SanitizerCoverage.cpp",
     "ThreadSanitizer.cpp",
   ]
 }