[Driver] Enable sanitizers on FreeBSD AArch64

[andrew]

Summary

These sanitizers have been ported and tested to work on AArch64.

[dim]

LGTM, are there any tests that need to be enabled explicitly?

[andrew]

No tests, but D125883, D125758, and D125873 need to be committed first.

[MaskRay]

[Driver] Enable sanitizers on FreeBSD AArch64

Be specific what sanitizers are enabled.

clang/lib/Driver/ToolChains/FreeBSD.cpp

SanitizerMask FreeBSD::getSupportedSanitizers() const {
   const bool IsX86 = getTriple().getArch() == llvm::Triple::x86;
   const bool IsX86_64 = getTriple().getArch() == llvm::Triple::x86_64;
   const bool IsMIPS64 = getTriple().isMIPS64();
   SanitizerMask Res = ToolChain::getSupportedSanitizers();
   Res |= SanitizerKind::Address;
   Res |= SanitizerKind::PointerCompare;
   Res |= SanitizerKind::PointerSubtract;
   Res |= SanitizerKind::Vptr;
-  if (IsX86_64 || IsMIPS64) {
+  if (IsAArch64 || IsX86_64 || IsMIPS64) {
     Res |= SanitizerKind::Leak;
     Res |= SanitizerKind::Thread;
   }
   if (IsX86 || IsX86_64) {
     Res |= SanitizerKind::Function;
+  }
+  if (IsAArch64 || IsX86 || IsX86_64) {
     Res |= SanitizerKind::SafeStack;
     Res |= SanitizerKind::Fuzzer;
     Res |= SanitizerKind::FuzzerNoLink;
   }
   if (IsAArch64 || IsX86_64) {
     Res |= SanitizerKind::KernelAddress;
     Res |= SanitizerKind::KernelMemory;
-  }
-  if (IsX86_64) {
     Res |= SanitizerKind::Memory;
   }
   return Res;
 }
 
 void FreeBSD::addClangTargetOptions(const ArgList &DriverArgs,
                                     ArgStringList &CC1Args,
                                     Action::OffloadKind) const {
   if (!DriverArgs.hasFlag(options::OPT_fuse_init_array,
                           options::OPT_fno_use_init_array,
                           getTriple().getOSMajorVersion() >= 12))
     CC1Args.push_back("-fno-use-init-array");
 }