[PATCH] D127544: Add no_sanitize('hwaddress') (and 'memtag', but that's a no-op).

[Hubert Tong via Phabricator via cfe-commits]

hubert.reinterpretcast added a comment.

>From the content of this patch, it probably is `llvm/lib/Transforms/Instrumentation/HWAddressSanitizer.cpp`:

  switch (TargetTriple.getArch()) {
  case Triple::x86_64:
    // The signal handler will find the data address in rdi.
    Asm = InlineAsm::get(
        FunctionType::get(IRB.getVoidTy(), {PtrLong->getType()}, false),
        "int3\nnopl " +
            itostr(0x40 + (AccessInfo & HWASanAccessInfo::RuntimeMask)) +
            "(%rax)",
        "{rdi}",
        /*hasSideEffects=*/true);
    break;
  case Triple::aarch64:
  case Triple::aarch64_be:
    // The signal handler will find the data address in x0.
    Asm = InlineAsm::get(
        FunctionType::get(IRB.getVoidTy(), {PtrLong->getType()}, false),
        "brk #" + itostr(0x900 + (AccessInfo & HWASanAccessInfo::RuntimeMask)),
        "{x0}",
        /*hasSideEffects=*/true);
    break;
  default:
    report_fatal_error("unsupported architecture");
  }


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D127544/new/

https://reviews.llvm.org/D127544