[PATCH] D11645: [sanitizers] Enable dfsan for aarch64

[Adhemerval Zanella]

zatrazz created this revision.
zatrazz added reviewers: t.p.northover, aemerson, rengolin.
zatrazz added a subscriber: llvm-commits.
Herald added subscribers: rengolin, aemerson.

This patch enable DFSan memory transformation for aarch64 (39-bit VMA).

http://reviews.llvm.org/D11645

Files:
  lib/Transforms/Instrumentation/DataFlowSanitizer.cpp

Index: lib/Transforms/Instrumentation/DataFlowSanitizer.cpp
===================================================================
--- lib/Transforms/Instrumentation/DataFlowSanitizer.cpp
+++ lib/Transforms/Instrumentation/DataFlowSanitizer.cpp
@@ -420,6 +420,8 @@
   bool IsX86_64 = TargetTriple.getArch() == llvm::Triple::x86_64;
   bool IsMIPS64 = TargetTriple.getArch() == llvm::Triple::mips64 ||
                   TargetTriple.getArch() == llvm::Triple::mips64el;
+  bool IsAArch64 = TargetTriple.getArch() == llvm::Triple::aarch64 ||
+                   TargetTriple.getArch() == llvm::Triple::aarch64_be;
 
   const DataLayout &DL = M.getDataLayout();
 
@@ -434,6 +436,8 @@
     ShadowPtrMask = ConstantInt::getSigned(IntptrTy, ~0x700000000000LL);
   else if (IsMIPS64)
     ShadowPtrMask = ConstantInt::getSigned(IntptrTy, ~0xF000000000LL);
+  else if (IsAArch64)
+    ShadowPtrMask = ConstantInt::getSigned(IntptrTy, ~0x7800000000LL);
   else
     report_fatal_error("unsupported triple");
 


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