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Add the ShadowCallStack attribute

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Summary:
Introduce the ShadowCallStack function attribute. It's added to
functions compiled with -fsanitize=shadow-call-stack in order to mark
functions to be instrumented by a ShadowCallStack pass to be submitted
in a separate change.

Reviewers: pcc, kcc, kubamracek

Reviewed By: pcc, kcc

Subscribers: cryptoad, mehdi_amini, javed.absar, llvm-commits, kcc

Differential Revision: https://reviews.llvm.org/D44800

llvm-svn: 329108
This commit is contained in:
Vlad Tsyrklevich
2018-04-03 20:10:40 +00:00
parent c6bf37d56d
commit d17f61ea3b
14 changed files with 36 additions and 2 deletions
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3
llvm/lib/Bitcode/Reader/BitcodeReader.cpp
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@@ -1162,6 +1162,7 @@ static uint64_t getRawAttributeMask(Attribute::AttrKind Val) {
case Attribute::SanitizeHWAddress: return 1ULL << 56;
case Attribute::NoCfCheck: return 1ULL << 57;
case Attribute::OptForFuzzing: return 1ULL << 58;
case Attribute::ShadowCallStack: return 1ULL << 59;
case Attribute::Dereferenceable:
llvm_unreachable("dereferenceable attribute not supported in raw format");
break;
@@ -1372,6 +1373,8 @@ static Attribute::AttrKind getAttrFromCode(uint64_t Code) {
return Attribute::StackProtectStrong;
case bitc::ATTR_KIND_SAFESTACK:
return Attribute::SafeStack;
case bitc::ATTR_KIND_SHADOWCALLSTACK:
return Attribute::ShadowCallStack;
case bitc::ATTR_KIND_STRICT_FP:
return Attribute::StrictFP;
case bitc::ATTR_KIND_STRUCT_RET: