[Driver] Support for disabling sanitizer runtime linking

[phosek]

Summary

This change introduces a pair of -fsanitize-link-runtime and
-fno-sanitize-link-runtime flags which can be used to control linking of
sanitizer runtimes. This is useful in certain environments like kernels
where existing runtime libraries cannot be used.

[morehouse]

LGTM

[MaskRay]

There is an existing option -fsanitize-minimal-runtime, will -fsanitize-no-runtime be a name providing more consistency?

[pcc]

It's also worth asking whether -nodefaultlibs would work for this use case as @filcab suggested on D64547.

[phosek]

In D65029#1594437, @pcc wrote:

It's also worth asking whether -nodefaultlibs would work for this use case as @filcab suggested on D64547.

It wouldn't, -nodefaultlibs (same as -nostdlib) disables linking of runtime dependencies, but not the runtime itself, e.g. -fsanitize=address -nodefaultlibs disables linking of -lpthread -lrt -lm -ldl which are all dependencies of ASan, but doesn't disable linking of libclang_rt.asan.a which is what we care about.

In D65029#1594409, @MaskRay wrote:

There is an existing option -fsanitize-minimal-runtime, will -fsanitize-no-runtime be a name providing more consistency?

That's fine with me, I used -f[no-]sanitize-link-deps for consistency with XRay, but -fsanitize-no-runtime would work as well.

[phosek]

I've updated the change and renamed the flag to -fsanitize-no-runtime although I'm not sure if it's necessarily better. I was thinking that ideal interface might be -fsanitize-runtime=(none|minimal|shared|static) which could also replace -fshared-libsan and -fstatic-libsan, but it'd be a breaking change so we might have to keep the existing flag and maybe print a deprecation warning. WDYT?

[MaskRay]

In D65029#1613315, @phosek wrote:

I've updated the change and renamed the flag to -fsanitize-no-runtime although I'm not sure if it's necessarily better. I was thinking that ideal interface might be -fsanitize-runtime=(none|minimal|shared|static) which could also replace -fshared-libsan and -fstatic-libsan, but it'd be a breaking change so we might have to keep the existing flag and maybe print a deprecation warning. WDYT?

+1 for -fsanitize-runtime=

[phosek]

I've decided to go with the original -f[no-]sanitize-link-deps: -fsanitize-minimal-runtime is also a cc1 flag which affects codegen, -fshared-libsan and -fstatic-libsan are orthogonal, e.g. it's possible to have minimal shared or static runtime, so these really need to be different flags.

[phosek]

One more change, I went with -fsanitize-runtime and -fno-sanitize-runtime in the end which seems like the best fit.

cfe/trunk/include/clang/Driver/Options.td

 def fsanitize_undefined_trap_on_error : Flag<["-"], "fsanitize-undefined-trap-on-error">,
                                         Group<f_clang_Group>;
 def fno_sanitize_undefined_trap_on_error : Flag<["-"], "fno-sanitize-undefined-trap-on-error">,
                                            Group<f_clang_Group>;
 def fsanitize_minimal_runtime : Flag<["-"], "fsanitize-minimal-runtime">,
                                         Group<f_clang_Group>;
 def fno_sanitize_minimal_runtime : Flag<["-"], "fno-sanitize-minimal-runtime">,
                                         Group<f_clang_Group>;
+def fsanitize_link_runtime : Flag<["-"], "fsanitize-link-runtime">,
+                           Group<f_clang_Group>;
+def fno_sanitize_link_runtime : Flag<["-"], "fno-sanitize-link-runtime">,
+                              Group<f_clang_Group>;
 def fsanitize_link_cxx_runtime : Flag<["-"], "fsanitize-link-c++-runtime">,
                                  Group<f_clang_Group>;
+def fno_sanitize_link_cxx_runtime : Flag<["-"], "fno-sanitize-link-c++-runtime">,
+                                    Group<f_clang_Group>;
 def fsanitize_cfi_cross_dso : Flag<["-"], "fsanitize-cfi-cross-dso">,
                               Group<f_clang_Group>,
                               HelpText<"Enable control flow integrity (CFI) checks for cross-DSO calls.">;
 def fno_sanitize_cfi_cross_dso : Flag<["-"], "fno-sanitize-cfi-cross-dso">,
                                  Flags<[CoreOption, DriverOption]>,
                                  Group<f_clang_Group>,
                                  HelpText<"Disable control flow integrity (CFI) checks for cross-DSO calls.">;
 def fsanitize_cfi_icall_generalize_pointers : Flag<["-"], "fsanitize-cfi-icall-generalize-pointers">,

cfe/trunk/include/clang/Driver/SanitizerArgs.h

class SanitizerArgs {
   bool SharedRuntime = false;
   bool AsanUseAfterScope = true;
   bool AsanPoisonCustomArrayCookie = false;
   bool AsanGlobalsDeadStripping = false;
   bool AsanUseOdrIndicator = false;
   bool AsanInvalidPointerCmp = false;
   bool AsanInvalidPointerSub = false;
   std::string HwasanAbi;
+  bool LinkRuntimes = true;
   bool LinkCXXRuntimes = false;
   bool NeedPIE = false;
   bool SafeStackRuntime = false;
   bool Stats = false;
   bool TsanMemoryAccess = true;
   bool TsanFuncEntryExit = true;
   bool TsanAtomics = true;
   bool MinimalRuntime = false;
   // True if cross-dso CFI support if provided by the system (i.e. Android).
   bool ImplicitCfiRuntime = false;
 
  public:
   /// Parses the sanitizer arguments from an argument list.
   SanitizerArgs(const ToolChain &TC, const llvm::opt::ArgList &Args);
 
   bool needsSharedRt() const { return SharedRuntime; }
 
   bool needsAsanRt() const { return Sanitizers.has(SanitizerKind::Address); }
-  bool needsHwasanRt() const { return Sanitizers.has(SanitizerKind::HWAddress); }
+  bool needsHwasanRt() const {
+    return Sanitizers.has(SanitizerKind::HWAddress);
+  }
   bool needsTsanRt() const { return Sanitizers.has(SanitizerKind::Thread); }
   bool needsMsanRt() const { return Sanitizers.has(SanitizerKind::Memory); }
   bool needsFuzzer() const { return Sanitizers.has(SanitizerKind::Fuzzer); }
   bool needsLsanRt() const {
     return Sanitizers.has(SanitizerKind::Leak) &&
            !Sanitizers.has(SanitizerKind::Address) &&
            !Sanitizers.has(SanitizerKind::HWAddress);
   }
   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 needsScudoRt() const { return Sanitizers.has(SanitizerKind::Scudo); }
 
   bool requiresPIE() const;
   bool needsUnwindTables() const;
   bool needsLTO() const;
+  bool linkRuntimes() const { return LinkRuntimes; }
   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

cfe/trunk/lib/Driver/SanitizerArgs.cpp

if (AllAddedKinds & SanitizerKind::HWAddress) {
     }
   }
 
   if (AllAddedKinds & SanitizerKind::SafeStack) {
     // SafeStack runtime is built into the system on Fuchsia.
     SafeStackRuntime = !TC.getTriple().isOSFuchsia();
   }
 
+  LinkRuntimes =
+      Args.hasFlag(options::OPT_fsanitize_link_runtime,
+                   options::OPT_fno_sanitize_link_runtime, LinkRuntimes);
+
   // Parse -link-cxx-sanitizer flag.
-  LinkCXXRuntimes =
-      Args.hasArg(options::OPT_fsanitize_link_cxx_runtime) || D.CCCIsCXX();
+  LinkCXXRuntimes = Args.hasArg(options::OPT_fsanitize_link_cxx_runtime,
+                                options::OPT_fno_sanitize_link_cxx_runtime,
+                                LinkCXXRuntimes) ||
+                    D.CCCIsCXX();
 
   // Finally, initialize the set of available and recoverable sanitizers.
   Sanitizers.Mask |= Kinds;
   RecoverableSanitizers.Mask |= RecoverableKinds;
   TrapSanitizers.Mask |= TrappingKinds;
   assert(!(RecoverableKinds & TrappingKinds) &&
          "Overlap between recoverable and trapping sanitizers");
 }

cfe/trunk/lib/Driver/ToolChains/CommonArgs.cpp

collectSanitizerRuntimes(const ToolChain &TC, const ArgList &Args,
                          SmallVectorImpl<StringRef> &SharedRuntimes,
                          SmallVectorImpl<StringRef> &StaticRuntimes,
                          SmallVectorImpl<StringRef> &NonWholeStaticRuntimes,
                          SmallVectorImpl<StringRef> &HelperStaticRuntimes,
                          SmallVectorImpl<StringRef> &RequiredSymbols) {
   const SanitizerArgs &SanArgs = TC.getSanitizerArgs();
   // Collect shared runtimes.
   if (SanArgs.needsSharedRt()) {
-    if (SanArgs.needsAsanRt()) {
+    if (SanArgs.needsAsanRt() && SanArgs.linkRuntimes()) {
       SharedRuntimes.push_back("asan");
       if (!Args.hasArg(options::OPT_shared) && !TC.getTriple().isAndroid())
         HelperStaticRuntimes.push_back("asan-preinit");
     }
-    if (SanArgs.needsUbsanRt()) {
+    if (SanArgs.needsUbsanRt() && SanArgs.linkRuntimes()) {
       if (SanArgs.requiresMinimalRuntime())
         SharedRuntimes.push_back("ubsan_minimal");
       else
         SharedRuntimes.push_back("ubsan_standalone");
     }
-    if (SanArgs.needsScudoRt()) {
+    if (SanArgs.needsScudoRt() && SanArgs.linkRuntimes()) {
       if (SanArgs.requiresMinimalRuntime())
         SharedRuntimes.push_back("scudo_minimal");
       else
         SharedRuntimes.push_back("scudo");
     }
-    if (SanArgs.needsHwasanRt())
+    if (SanArgs.needsHwasanRt() && SanArgs.linkRuntimes())
       SharedRuntimes.push_back("hwasan");
   }
 
   // The stats_client library is also statically linked into DSOs.
-  if (SanArgs.needsStatsRt())
+  if (SanArgs.needsStatsRt() && SanArgs.linkRuntimes())
     StaticRuntimes.push_back("stats_client");
 
   // Collect static runtimes.
   if (Args.hasArg(options::OPT_shared) || SanArgs.needsSharedRt()) {
     // Don't link static runtimes into DSOs or if -shared-libasan.
     return;
   }
-  if (SanArgs.needsAsanRt()) {
+  if (SanArgs.needsAsanRt() && SanArgs.linkRuntimes()) {
     StaticRuntimes.push_back("asan");
     if (SanArgs.linkCXXRuntimes())
       StaticRuntimes.push_back("asan_cxx");
   }
 
-  if (SanArgs.needsHwasanRt()) {
+  if (SanArgs.needsHwasanRt() && SanArgs.linkRuntimes()) {
     StaticRuntimes.push_back("hwasan");
     if (SanArgs.linkCXXRuntimes())
       StaticRuntimes.push_back("hwasan_cxx");
   }
-  if (SanArgs.needsDfsanRt())
+  if (SanArgs.needsDfsanRt() && SanArgs.linkRuntimes())
     StaticRuntimes.push_back("dfsan");
-  if (SanArgs.needsLsanRt())
+  if (SanArgs.needsLsanRt() && SanArgs.linkRuntimes())
     StaticRuntimes.push_back("lsan");
-  if (SanArgs.needsMsanRt()) {
+  if (SanArgs.needsMsanRt() && SanArgs.linkRuntimes()) {
     StaticRuntimes.push_back("msan");
     if (SanArgs.linkCXXRuntimes())
       StaticRuntimes.push_back("msan_cxx");
   }
-  if (SanArgs.needsTsanRt()) {
+  if (SanArgs.needsTsanRt() && SanArgs.linkRuntimes()) {
     StaticRuntimes.push_back("tsan");
     if (SanArgs.linkCXXRuntimes())
       StaticRuntimes.push_back("tsan_cxx");
   }
-  if (SanArgs.needsUbsanRt()) {
+  if (SanArgs.needsUbsanRt() && SanArgs.linkRuntimes()) {
     if (SanArgs.requiresMinimalRuntime()) {
       StaticRuntimes.push_back("ubsan_minimal");
     } else {
       StaticRuntimes.push_back("ubsan_standalone");
       if (SanArgs.linkCXXRuntimes())
         StaticRuntimes.push_back("ubsan_standalone_cxx");
     }
   }
-  if (SanArgs.needsSafeStackRt()) {
+  if (SanArgs.needsSafeStackRt() && SanArgs.linkRuntimes()) {
     NonWholeStaticRuntimes.push_back("safestack");
     RequiredSymbols.push_back("__safestack_init");
   }
-  if (SanArgs.needsCfiRt())
+  if (SanArgs.needsCfiRt() && SanArgs.linkRuntimes())
     StaticRuntimes.push_back("cfi");
-  if (SanArgs.needsCfiDiagRt()) {
+  if (SanArgs.needsCfiDiagRt() && SanArgs.linkRuntimes()) {
     StaticRuntimes.push_back("cfi_diag");
     if (SanArgs.linkCXXRuntimes())
       StaticRuntimes.push_back("ubsan_standalone_cxx");
   }
-  if (SanArgs.needsStatsRt()) {
+  if (SanArgs.needsStatsRt() && SanArgs.linkRuntimes()) {
     NonWholeStaticRuntimes.push_back("stats");
     RequiredSymbols.push_back("__sanitizer_stats_register");
   }
-  if (SanArgs.needsScudoRt()) {
+  if (SanArgs.needsScudoRt() && SanArgs.linkRuntimes()) {
     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())
         StaticRuntimes.push_back("scudo_cxx");
     }
   }
 }
 
 // Should be called before we add system libraries (C++ ABI, libstdc++/libc++,
 // C runtime, etc). Returns true if sanitizer system deps need to be linked in.
 bool tools::addSanitizerRuntimes(const ToolChain &TC, const ArgList &Args,
                                  ArgStringList &CmdArgs) {
   SmallVector<StringRef, 4> SharedRuntimes, StaticRuntimes,
       NonWholeStaticRuntimes, HelperStaticRuntimes, RequiredSymbols;
   collectSanitizerRuntimes(TC, Args, SharedRuntimes, StaticRuntimes,
                            NonWholeStaticRuntimes, HelperStaticRuntimes,
                            RequiredSymbols);
 
+  const SanitizerArgs &SanArgs = TC.getSanitizerArgs();
   // Inject libfuzzer dependencies.
-  if (TC.getSanitizerArgs().needsFuzzer()
-      && !Args.hasArg(options::OPT_shared)) {
+  if (SanArgs.needsFuzzer() && SanArgs.linkRuntimes() &&
+      !Args.hasArg(options::OPT_shared)) {
 
     addSanitizerRuntime(TC, Args, CmdArgs, "fuzzer", false, true);
     if (!Args.hasArg(clang::driver::options::OPT_nostdlibxx))
       TC.AddCXXStdlibLibArgs(Args, CmdArgs);
   }
 
   for (auto RT : SharedRuntimes)
     addSanitizerRuntime(TC, Args, CmdArgs, RT, true, false);
for (auto S : RequiredSymbols) {
     CmdArgs.push_back("-u");
     CmdArgs.push_back(Args.MakeArgString(S));
   }
   // If there is a static runtime with no dynamic list, force all the symbols
   // to be dynamic to be sure we export sanitizer interface functions.
   if (AddExportDynamic)
     CmdArgs.push_back("--export-dynamic");
 
-  const SanitizerArgs &SanArgs = TC.getSanitizerArgs();
   if (SanArgs.hasCrossDsoCfi() && !AddExportDynamic)
     CmdArgs.push_back("-export-dynamic-symbol=__cfi_check");
 
   return !StaticRuntimes.empty() || !NonWholeStaticRuntimes.empty();
 }
 
 bool tools::addXRayRuntime(const ToolChain&TC, const ArgList &Args, ArgStringList &CmdArgs) {
   if (Args.hasArg(options::OPT_shared))

cfe/trunk/test/Driver/sanitizer-ld.c

 // CHECK-ASAN-LINUX: libclang_rt.asan-i386.a"
 // CHECK-ASAN-LINUX-NOT: "--export-dynamic"
 // CHECK-ASAN-LINUX: "--dynamic-list={{.*}}libclang_rt.asan-i386.a.syms"
 // CHECK-ASAN-LINUX-NOT: "--export-dynamic"
 // CHECK-ASAN-LINUX: "-lpthread"
 // CHECK-ASAN-LINUX: "-lrt"
 // CHECK-ASAN-LINUX: "-ldl"
 
+// RUN: %clang -fsanitize=address -fno-sanitize-link-runtime %s -### -o %t.o 2>&1 \
+// RUN:     -target x86_64-unknown-linux -fuse-ld=ld \
+// RUN:     -resource-dir=%S/Inputs/resource_dir \
+// RUN:     --sysroot=%S/Inputs/basic_linux_tree \
+// RUN:   | FileCheck --check-prefix=CHECK-ASAN-NO-LINK-RUNTIME-LINUX %s
+//
+// CHECK-ASAN-NO-LINK-RUNTIME-LINUX-NOT: libclang_rt.asan
+
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     -target i386-unknown-linux -fuse-ld=ld -fsanitize=address -shared-libsan \
 // RUN:     -resource-dir=%S/Inputs/resource_dir \
 // RUN:     --sysroot=%S/Inputs/basic_linux_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-SHARED-ASAN-LINUX %s
 
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     -target i386-unknown-linux -fuse-ld=ld -fsanitize=address -shared-libasan \

 // CHECK-TSAN-LINUX-CXX: "--whole-archive" "{{.*}}libclang_rt.tsan_cxx-x86_64.a" "--no-whole-archive"
 // CHECK-TSAN-LINUX-CXX: "--dynamic-list={{.*}}libclang_rt.tsan_cxx-x86_64.a.syms"
 // CHECK-TSAN-LINUX-CXX-NOT: "--export-dynamic"
 // CHECK-TSAN-LINUX-CXX: stdc++
 // CHECK-TSAN-LINUX-CXX: "-lpthread"
 // CHECK-TSAN-LINUX-CXX: "-lrt"
 // CHECK-TSAN-LINUX-CXX: "-ldl"
 
+// RUN: %clang -fsanitize=thread -fno-sanitize-link-runtime %s -### -o %t.o 2>&1 \
+// RUN:     -target x86_64-unknown-linux -fuse-ld=ld \
+// RUN:     -resource-dir=%S/Inputs/resource_dir \
+// RUN:     --sysroot=%S/Inputs/basic_linux_tree \
+// RUN:   | FileCheck --check-prefix=CHECK-TSAN-NO-LINK-RUNTIME-LINUX %s
+//
+// CHECK-TSAN-NO-LINK-RUNTIME-LINUX-NOT: libclang_rt.tsan
+
 // RUN: %clangxx -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     -target x86_64-unknown-linux -fuse-ld=ld -stdlib=platform -lstdc++ \
 // RUN:     -fsanitize=memory \
 // RUN:     -resource-dir=%S/Inputs/resource_dir \
 // RUN:     --sysroot=%S/Inputs/basic_linux_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-MSAN-LINUX-CXX %s
 //
 // CHECK-MSAN-LINUX-CXX: "{{(.*[^-.0-9A-Z_a-z])?}}ld{{(.exe)?}}"
 // CHECK-MSAN-LINUX-CXX-NOT: stdc++
 // CHECK-MSAN-LINUX-CXX: "--whole-archive" "{{.*}}libclang_rt.msan-x86_64.a" "--no-whole-archive"
 // CHECK-MSAN-LINUX-CXX: "--dynamic-list={{.*}}libclang_rt.msan-x86_64.a.syms"
 // CHECK-MSAN-LINUX-CXX: "--whole-archive" "{{.*}}libclang_rt.msan_cxx-x86_64.a" "--no-whole-archive"
 // CHECK-MSAN-LINUX-CXX: "--dynamic-list={{.*}}libclang_rt.msan_cxx-x86_64.a.syms"
 // CHECK-MSAN-LINUX-CXX-NOT: "--export-dynamic"
 // CHECK-MSAN-LINUX-CXX: stdc++
 // CHECK-MSAN-LINUX-CXX: "-lpthread"
 // CHECK-MSAN-LINUX-CXX: "-lrt"
 // CHECK-MSAN-LINUX-CXX: "-ldl"
 
+// RUN: %clang -fsanitize=memory -fno-sanitize-link-runtime %s -### -o %t.o 2>&1 \
+// RUN:     -target x86_64-unknown-linux -fuse-ld=ld \
+// RUN:     -resource-dir=%S/Inputs/resource_dir \
+// RUN:     --sysroot=%S/Inputs/basic_linux_tree \
+// RUN:   | FileCheck --check-prefix=CHECK-MSAN-NO-LINK-RUNTIME-LINUX %s
+//
+// CHECK-MSAN-NO-LINK-RUNTIME-LINUX-NOT: libclang_rt.msan
+
 // RUN: %clang -fsanitize=undefined %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-UBSAN-LINUX %s
 
 // RUN: %clang -fsanitize=float-divide-by-zero %s -### -o %t.o 2>&1 \
 // RUN:     -target i386-unknown-linux -fuse-ld=ld \
 // RUN:     --sysroot=%S/Inputs/basic_linux_tree \

 // CHECK-UBSAN-LINUX-NOT: libclang_rt.asan
 // CHECK-UBSAN-LINUX-NOT: libclang_rt.ubsan_standalone_cxx
 // CHECK-UBSAN-LINUX: "--whole-archive" "{{.*}}libclang_rt.ubsan_standalone-i386.a" "--no-whole-archive"
 // CHECK-UBSAN-LINUX-NOT: libclang_rt.asan
 // CHECK-UBSAN-LINUX-NOT: libclang_rt.ubsan_standalone_cxx
 // CHECK-UBSAN-LINUX-NOT: "-lstdc++"
 // CHECK-UBSAN-LINUX: "-lpthread"
 
+// RUN: %clang -fsanitize=undefined -fno-sanitize-link-runtime %s -### -o %t.o 2>&1 \
+// RUN:     -target x86_64-unknown-linux -fuse-ld=ld \
+// RUN:     -resource-dir=%S/Inputs/resource_dir \
+// RUN:     --sysroot=%S/Inputs/basic_linux_tree \
+// RUN:   | FileCheck --check-prefix=CHECK-UBSAN-NO-LINK-RUNTIME-LINUX %s
+//
+// CHECK-UBSAN-NO-LINK-RUNTIME-LINUX-NOT: libclang_rt.undefined
+
 // RUN: %clang -fsanitize=undefined %s -### -o %t.o 2>&1 \
 // RUN:     -target i386-unknown-linux -fuse-ld=ld \
 // RUN:     --sysroot=%S/Inputs/basic_linux_tree \
 // RUN:     -shared-libsan \
 // RUN:   | FileCheck --check-prefix=CHECK-UBSAN-LINUX-SHAREDLIBASAN %s
 
 // RUN: %clang -fsanitize=undefined %s -### -o %t.o 2>&1 \
 // RUN:     -target i386-unknown-linux -fuse-ld=ld \

 //
 // CHECK-LSAN-LINUX: "{{(.*[^-.0-9A-Z_a-z])?}}ld{{(.exe)?}}"
 // CHECK-LSAN-LINUX-NOT: "-lc"
 // CHECK-LSAN-LINUX-NOT: libclang_rt.ubsan
 // CHECK-LSAN-LINUX: libclang_rt.lsan-x86_64.a"
 // CHECK-LSAN-LINUX: "-lpthread"
 // CHECK-LSAN-LINUX: "-ldl"
 
+// RUN: %clang -fsanitize=leak -fno-sanitize-link-runtime %s -### -o %t.o 2>&1 \
+// RUN:     -target x86_64-unknown-linux -fuse-ld=ld \
+// RUN:     -resource-dir=%S/Inputs/resource_dir \
+// RUN:     --sysroot=%S/Inputs/basic_linux_tree \
+// RUN:   | FileCheck --check-prefix=CHECK-LSAN-NO-LINK-RUNTIME-LINUX %s
+//
+// CHECK-LSAN-NO-LINK-RUNTIME-LINUX-NOT: libclang_rt.lsan
+
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:  -target x86_64-unknown-linux -fuse-ld=ld -fsanitize=leak -fsanitize-coverage=func \
 // RUN:  --sysroot=%S/Inputs/basic_linux_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-LSAN-COV-LINUX %s
 //
 // CHECK-LSAN-COV-LINUX: "{{(.*[^-.0-9A-Z_a-z])?}}ld{{(.exe)?}}"
 // CHECK-LSAN-COV-LINUX-NOT: "-lc"
 // CHECK-LSAN-COV-LINUX-NOT: libclang_rt.ubsan