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The size limit is for individual arrays. So if any array has more than 8 bytes

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in it, then emit stack protectors.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@58819 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling 2008-11-06 22:18:44 +00:00
parent 97f48c39fd
commit 703ccfe053
1 changed files with 3 additions and 5 deletions
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8
lib/CodeGen/StackProtector.cpp
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@ -192,9 +192,6 @@ bool StackProtector::RequiresStackProtector() const {
default: return false;
case SSP::ALL: return true;
case SSP::SOME: {
// If the size of the local variables allocated on the stack is greater than
// SSPBufferSize, then we require a stack protector.
uint64_t StackSize = 0;
const TargetData *TD = TLI->getTargetData();
for (Function::iterator I = F->begin(), E = F->end(); I != E; ++I) {
@ -208,9 +205,10 @@ bool StackProtector::RequiresStackProtector() const {
if (ConstantInt *CI = dyn_cast<ConstantInt>(AI->getArraySize())) {
const Type *Ty = AI->getAllocatedType();
uint64_t TySize = TD->getABITypeSize(Ty);
StackSize += TySize * CI->getZExtValue(); // Total allocated size.
if (SSPBufferSize <= StackSize)
// If an array has more than 8 bytes of allocated space, then we
// emit stack protectors.
if (SSPBufferSize <= TySize * CI->getZExtValue())
return true;
} else {
// This is a call to alloca with a variable size. Default to adding