[clang] [MinGW] Allow using the vptr sanitizer

[rnk]

lgtm

[sberg]

Smells like this breaks various bots due to a -fsanitize=...,... option now listing 18 instead of 17 items, see http://lab.llvm.org:8011/#builders/76/builds/363, http://lab.llvm.org:8011/#builders/93/builds/430, http://lab.llvm.org:8011/#builders/66/builds/315, http://lab.llvm.org:8011/#builders/7/builds/303.

[mstorsjo]

In D90572#2370716, @sberg wrote:

Smells like this breaks various bots due to a -fsanitize=...,... option now listing 18 instead of 17 items, see http://lab.llvm.org:8011/#builders/76/builds/363, http://lab.llvm.org:8011/#builders/93/builds/430, http://lab.llvm.org:8011/#builders/66/builds/315, http://lab.llvm.org:8011/#builders/7/builds/303.

Yep, I pushed a commit that is supposed to fix it, d3bd06f5c709fe073739a06e0d5a22020f0bf90c, but all bots haven't caught up yet. Sorry for the noise and breakage.

clang/lib/Driver/ToolChains/MinGW.cpp

toolchains::MinGW::GetExceptionModel(const ArgList &Args) const {
   return llvm::ExceptionHandling::DwarfCFI;
 }
 
 SanitizerMask toolchains::MinGW::getSupportedSanitizers() const {
   SanitizerMask Res = ToolChain::getSupportedSanitizers();
   Res |= SanitizerKind::Address;
   Res |= SanitizerKind::PointerCompare;
   Res |= SanitizerKind::PointerSubtract;
+  Res |= SanitizerKind::Vptr;
   return Res;
 }
 
 void toolchains::MinGW::AddCudaIncludeArgs(const ArgList &DriverArgs,
                                            ArgStringList &CC1Args) const {
   CudaInstallation.AddCudaIncludeArgs(DriverArgs, CC1Args);
 }
 

clang/test/Driver/mingw-sanitizers.c

 // RUN: %clang -target i686-windows-gnu %s -### -fsanitize=address 2>&1 | FileCheck --check-prefix=ASAN-I686 %s
 // ASAN-I686: "{{.*}}libclang_rt.asan_dynamic-i386.dll.a"
 // ASAN-I686: "{{[^"]*}}libclang_rt.asan_dynamic_runtime_thunk-i386.a"
 // ASAN-I686: "--require-defined" "___asan_seh_interceptor"
 // ASAN-I686: "--whole-archive" "{{.*}}libclang_rt.asan_dynamic_runtime_thunk-i386.a" "--no-whole-archive"
 
 // RUN: %clang -target x86_64-windows-gnu %s -### -fsanitize=address 2>&1 | FileCheck --check-prefix=ASAN-X86_64 %s
 // ASAN-X86_64: "{{.*}}libclang_rt.asan_dynamic-x86_64.dll.a"
 // ASAN-X86_64: "{{[^"]*}}libclang_rt.asan_dynamic_runtime_thunk-x86_64.a"
 // ASAN-X86_64: "--require-defined" "__asan_seh_interceptor"
 // ASAN-X86_64: "--whole-archive" "{{.*}}libclang_rt.asan_dynamic_runtime_thunk-x86_64.a" "--no-whole-archive"
+
+// RUN: %clang -target x86_64-windows-gnu %s -### -fsanitize=vptr