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Neuter stack protectors by only checking character arrays. This is what GCC

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does.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84916 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling 2009-10-23 00:01:05 +00:00
parent 4c3715c2e5
commit dfd85c142f
1 changed files with 6 additions and 1 deletions
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7
lib/CodeGen/StackProtector.cpp
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@ -111,11 +111,16 @@ bool StackProtector::RequiresStackProtector() const {
// protectors. // protectors.
return true; return true;
if (const ArrayType *AT = dyn_cast<ArrayType>(AI->getAllocatedType())) if (const ArrayType *AT = dyn_cast<ArrayType>(AI->getAllocatedType())) {
// We apparently only care about character arrays.
if (AT->getElementType() != Type::getInt8Ty(AT->getContext()))
continue;
// If an array has more than SSPBufferSize bytes of allocated space, // If an array has more than SSPBufferSize bytes of allocated space,
// then we emit stack protectors. // then we emit stack protectors.
if (SSPBufferSize <= TD->getTypeAllocSize(AT)) if (SSPBufferSize <= TD->getTypeAllocSize(AT))
return true; return true;
}
} }
} }