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Hardware-assisted AddressSanitizer (llvm part).

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Summary:
This is LLVM instrumentation for the new HWASan tool. It is basically
a stripped down copy of ASan at this point, w/o stack or global
support. Instrumenation adds a global constructor + runtime callbacks
for every load and store.

HWASan comes with its own IR attribute.

A brief design document can be found in
clang/docs/HardwareAssistedAddressSanitizerDesign.rst (submitted earlier).

Reviewers: kcc, pcc, alekseyshl

Subscribers: srhines, mehdi_amini, mgorny, javed.absar, eraman, llvm-commits, hiraditya

Differential Revision: https://reviews.llvm.org/D40932

llvm-svn: 320217
This commit is contained in:
Evgeniy Stepanov
2017-12-09 00:21:41 +00:00
parent 8bd9d6ad83
commit c667c1f47a
30 changed files with 676 additions and 17 deletions
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3
llvm/lib/Bitcode/Reader/BitcodeReader.cpp
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@@ -1156,6 +1156,7 @@ static uint64_t getRawAttributeMask(Attribute::AttrKind Val) {
case Attribute::WriteOnly: return 1ULL << 53;
case Attribute::Speculatable: return 1ULL << 54;
case Attribute::StrictFP: return 1ULL << 55;
case Attribute::SanitizeHWAddress: return 1ULL << 56;
case Attribute::Dereferenceable:
llvm_unreachable("dereferenceable attribute not supported in raw format");
break;
@@ -1368,6 +1369,8 @@ static Attribute::AttrKind getAttrFromCode(uint64_t Code) {
return Attribute::StructRet;
case bitc::ATTR_KIND_SANITIZE_ADDRESS:
return Attribute::SanitizeAddress;
case bitc::ATTR_KIND_SANITIZE_HWADDRESS:
return Attribute::SanitizeHWAddress;
case bitc::ATTR_KIND_SANITIZE_THREAD:
return Attribute::SanitizeThread;
case bitc::ATTR_KIND_SANITIZE_MEMORY: