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[ASan] Do not use kDefaultShort64bitShadowOffset on Mac, where the binaries may get mapped at 0x100000000+ and thus may interleave with the shadow. 

llvm-svn: 174964
This commit is contained in:
Alexander Potapenko 2013-02-12 12:41:12 +00:00
parent 3bb17ebd93
commit 259e8127ad
1 changed files with 2 additions and 1 deletions
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3
llvm/lib/Transforms/Instrumentation/AddressSanitizer.cpp
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@ -202,6 +202,7 @@ static ShadowMapping getShadowMapping(const Module &M, int LongSize,
bool ZeroBaseShadow) {
llvm::Triple TargetTriple(M.getTargetTriple());
bool IsAndroid = TargetTriple.getEnvironment() == llvm::Triple::Android;
bool IsMacOSX = TargetTriple.getOS() == llvm::Triple::MacOSX;
bool IsPPC64 = TargetTriple.getArch() == llvm::Triple::ppc64;
bool IsX86_64 = TargetTriple.getArch() == llvm::Triple::x86_64;
@ -215,7 +216,7 @@ static ShadowMapping getShadowMapping(const Module &M, int LongSize,
Mapping.Offset = (IsAndroid || ZeroBaseShadow) ? 0 :
(LongSize == 32 ? kDefaultShadowOffset32 :
IsPPC64 ? kPPC64_ShadowOffset64 : kDefaultShadowOffset64);
if (!ZeroBaseShadow && ClShort64BitOffset && IsX86_64) {
if (!ZeroBaseShadow && ClShort64BitOffset && IsX86_64 && !IsMacOSX) {
assert(LongSize == 64);
Mapping.Offset = kDefaultShort64bitShadowOffset;
} if (!ZeroBaseShadow && ClMappingOffsetLog >= 0) {