Add support for the --param ssp-buffer-size= driver option.
PR9673
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162284 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/StackProtector.cpp b/lib/CodeGen/StackProtector.cpp
index b31db5f..a04ac3f 100644
--- a/lib/CodeGen/StackProtector.cpp
+++ b/lib/CodeGen/StackProtector.cpp
@@ -28,16 +28,10 @@
#include "llvm/Support/CommandLine.h"
#include "llvm/Target/TargetData.h"
#include "llvm/Target/TargetLowering.h"
+#include "llvm/Target/TargetOptions.h"
#include "llvm/ADT/Triple.h"
using namespace llvm;
-// SSPBufferSize - The lower bound for a buffer to be considered for stack
-// smashing protection.
-static cl::opt<unsigned>
-SSPBufferSize("stack-protector-buffer-size", cl::init(8),
- cl::desc("Lower bound for a buffer to be considered for "
- "stack protection"));
-
namespace {
class StackProtector : public FunctionPass {
/// TLI - Keep a pointer of a TargetLowering to consult for determining
@@ -111,8 +105,8 @@
bool StackProtector::ContainsProtectableArray(Type *Ty, bool InStruct) const {
if (!Ty) return false;
if (ArrayType *AT = dyn_cast<ArrayType>(Ty)) {
+ const TargetMachine &TM = TLI->getTargetMachine();
if (!AT->getElementType()->isIntegerTy(8)) {
- const TargetMachine &TM = TLI->getTargetMachine();
Triple Trip(TM.getTargetTriple());
// If we're on a non-Darwin platform or we're inside of a structure, don't
@@ -123,7 +117,7 @@
// If an array has more than SSPBufferSize bytes of allocated space, then we
// emit stack protectors.
- if (SSPBufferSize <= TLI->getTargetData()->getTypeAllocSize(AT))
+ if (TM.Options.SSPBufferSize <= TLI->getTargetData()->getTypeAllocSize(AT))
return true;
}