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[ASan] Use llvm::getDISubprogram() to get function entry debug location.

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It can be more robust than copying debug info from first non-alloca
instruction in the entry basic block. We use the same strategy in
coverage instrumentation.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@240738 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Alexey Samsonov 2015-06-26 00:00:47 +00:00
parent 2da1484e97
commit 863c0d000e
1 changed files with 3 additions and 7 deletions
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10
lib/Transforms/Instrumentation/AddressSanitizer.cpp
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@ -1674,12 +1674,6 @@ void FunctionStackPoisoner::SetShadowToStackAfterReturnInlined(
}
}
static DebugLoc getFunctionEntryDebugLocation(Function &F) {
for (const auto &Inst : F.getEntryBlock())
if (!isa<AllocaInst>(Inst)) return Inst.getDebugLoc();
return DebugLoc();
}
PHINode *FunctionStackPoisoner::createPHI(IRBuilder<> &IRB, Value *Cond,
Value *ValueIfTrue,
Instruction *ThenTerm,
@ -1732,7 +1726,9 @@ void FunctionStackPoisoner::poisonStack() {
if (AllocaVec.size() == 0) return;
int StackMallocIdx = -1;
DebugLoc EntryDebugLocation = getFunctionEntryDebugLocation(F);
DebugLoc EntryDebugLocation;
if (auto SP = getDISubprogram(&F))
EntryDebugLocation = DebugLoc::get(SP->getScopeLine(), 0, SP);
Instruction *InsBefore = AllocaVec[0];
IRBuilder<> IRB(InsBefore);