[ASan] Move the shadow on Windows 32-bit from 0x20000000 to 0x40000000

llvm-svn: 225641

1 files changed, 4 insertions, 0 deletions

diff --git a/llvm/lib/Transforms/Instrumentation/AddressSanitizer.cpp b/llvm/lib/Transforms/Instrumentation/AddressSanitizer.cpp
index 57665cb9676..745c85a98e2 100644
--- a/llvm/lib/Transforms/Instrumentation/AddressSanitizer.cpp
+++ b/llvm/lib/Transforms/Instrumentation/AddressSanitizer.cpp
@@ -67,6 +67,7 @@ static const uint64_t kMIPS32_ShadowOffset32 = 0x0aaa0000;
 static const uint64_t kMIPS64_ShadowOffset64 = 1ULL << 36;
 static const uint64_t kFreeBSD_ShadowOffset32 = 1ULL << 30;
 static const uint64_t kFreeBSD_ShadowOffset64 = 1ULL << 46;
+static const uint64_t kWindowsShadowOffset32 = 1ULL << 30;
 
 static const size_t kMinStackMallocSize = 1 << 6;  // 64B
 static const size_t kMaxStackMallocSize = 1 << 16;  // 64K
@@ -307,6 +308,7 @@ static ShadowMapping getShadowMapping(Triple &TargetTriple, int LongSize) {
                   TargetTriple.getArch() == llvm::Triple::mipsel;
   bool IsMIPS64 = TargetTriple.getArch() == llvm::Triple::mips64 ||
                   TargetTriple.getArch() == llvm::Triple::mips64el;
+  bool IsWindows = TargetTriple.isOSWindows();
 
   ShadowMapping Mapping;
 
@@ -319,6 +321,8 @@ static ShadowMapping getShadowMapping(Triple &TargetTriple, int LongSize) {
       Mapping.Offset = kFreeBSD_ShadowOffset32;
     else if (IsIOS)
       Mapping.Offset = kIOSShadowOffset32;
+    else if (IsWindows)
+      Mapping.Offset = kWindowsShadowOffset32;
     else
       Mapping.Offset = kDefaultShadowOffset32;
   } else {  // LongSize == 64