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Use zero-based shadow by default on Android. 

llvm-svn: 157317
This commit is contained in:
Evgeniy Stepanov 2012-05-23 11:52:12 +00:00
parent 7a50155227
commit 617232f32b
1 changed files with 7 additions and 2 deletions
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9
llvm/lib/Transforms/Instrumentation/AddressSanitizer.cpp
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@ -22,6 +22,7 @@
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/Triple.h"
#include "llvm/Function.h"
#include "llvm/IntrinsicInst.h"
#include "llvm/LLVMContext.h"
@ -47,6 +48,7 @@ using namespace llvm;
static const uint64_t kDefaultShadowScale = 3;
static const uint64_t kDefaultShadowOffset32 = 1ULL << 29;
static const uint64_t kDefaultShadowOffset64 = 1ULL << 44;
static const uint64_t kDefaultShadowOffsetAndroid = 0;
static const size_t kMaxStackMallocSize = 1 << 16; // 64K
static const uintptr_t kCurrentStackFrameMagic = 0x41B58AB3;
@ -571,8 +573,11 @@ bool AddressSanitizer::runOnModule(Module &M) {
AsanInitFunction->setLinkage(Function::ExternalLinkage);
IRB.CreateCall(AsanInitFunction);
MappingOffset = LongSize == 32
? kDefaultShadowOffset32 : kDefaultShadowOffset64;
llvm::Triple targetTriple(M.getTargetTriple());
bool isAndroid = targetTriple.getEnvironment() == llvm::Triple::ANDROIDEABI;
MappingOffset = isAndroid ? kDefaultShadowOffsetAndroid :
(LongSize == 32 ? kDefaultShadowOffset32 : kDefaultShadowOffset64);
if (ClMappingOffsetLog >= 0) {
if (ClMappingOffsetLog == 0) {
// special case