Hardware-assisted AddressSanitizer (llvm part).

Summary:
This is LLVM instrumentation for the new HWASan tool. It is basically
a stripped down copy of ASan at this point, w/o stack or global
support. Instrumenation adds a global constructor + runtime callbacks
for every load and store.

HWASan comes with its own IR attribute.

A brief design document can be found in
clang/docs/HardwareAssistedAddressSanitizerDesign.rst (submitted earlier).

Reviewers: kcc, pcc, alekseyshl

Subscribers: srhines, mehdi_amini, mgorny, javed.absar, eraman, llvm-commits, hiraditya

Differential Revision: https://reviews.llvm.org/D40932

llvm-svn: 320217

1 files changed, 11 insertions, 10 deletions

diff --git a/llvm/lib/CodeGen/ShrinkWrap.cpp b/llvm/lib/CodeGen/ShrinkWrap.cpp
index d6eca14b761..ed01a90969d 100644
--- a/llvm/lib/CodeGen/ShrinkWrap.cpp
+++ b/llvm/lib/CodeGen/ShrinkWrap.cpp
@@ -558,16 +558,17 @@ bool ShrinkWrap::isShrinkWrapEnabled(const MachineFunction &MF) {
   switch (EnableShrinkWrapOpt) {
   case cl::BOU_UNSET:
     return TFI->enableShrinkWrapping(MF) &&
-      // Windows with CFI has some limitations that make it impossible
-      // to use shrink-wrapping.
-      !MF.getTarget().getMCAsmInfo()->usesWindowsCFI() &&
-      // Sanitizers look at the value of the stack at the location
-      // of the crash. Since a crash can happen anywhere, the
-      // frame must be lowered before anything else happen for the
-      // sanitizers to be able to get a correct stack frame.
-      !(MF.getFunction()->hasFnAttribute(Attribute::SanitizeAddress) ||
-        MF.getFunction()->hasFnAttribute(Attribute::SanitizeThread) ||
-        MF.getFunction()->hasFnAttribute(Attribute::SanitizeMemory));
+           // Windows with CFI has some limitations that make it impossible
+           // to use shrink-wrapping.
+           !MF.getTarget().getMCAsmInfo()->usesWindowsCFI() &&
+           // Sanitizers look at the value of the stack at the location
+           // of the crash. Since a crash can happen anywhere, the
+           // frame must be lowered before anything else happen for the
+           // sanitizers to be able to get a correct stack frame.
+           !(MF.getFunction()->hasFnAttribute(Attribute::SanitizeAddress) ||
+             MF.getFunction()->hasFnAttribute(Attribute::SanitizeThread) ||
+             MF.getFunction()->hasFnAttribute(Attribute::SanitizeMemory) ||
+             MF.getFunction()->hasFnAttribute(Attribute::SanitizeHWAddress));
   // If EnableShrinkWrap is set, it takes precedence on whatever the
   // target sets. The rational is that we assume we want to test
   // something related to shrink-wrapping.