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| author | Guanzhong Chen <gzchen@google.com> | 2019-06-26 20:16:14 +0000 |
|---|---|---|
| committer | Guanzhong Chen <gzchen@google.com> | 2019-06-26 20:16:14 +0000 |
| commit | 9aad997a5aae3bd187e2b0fe093f0916c69989cb (patch) | |
| tree | 9062689e272807a92827285547fa7745b62e6741 /llvm/lib/Transforms | |
| parent | e15dc9546683348a5caaa650e539ccbc704463ee (diff) | |
| download | bcm5719-llvm-9aad997a5aae3bd187e2b0fe093f0916c69989cb.tar.gz bcm5719-llvm-9aad997a5aae3bd187e2b0fe093f0916c69989cb.zip | |
[WebAssembly] Implement Address Sanitizer for Emscripten
Summary:
This diff enables address sanitizer on Emscripten.
On Emscripten, real memory starts at the value passed to --global-base.
All memory before this is used as shadow memory, and thus the shadow mapping
function is simply dividing by 8.
Reviewers: tlively, aheejin, sbc100
Reviewed By: sbc100
Subscribers: dschuff, sbc100, jgravelle-google, hiraditya, sunfish, cfe-commits, llvm-commits
Tags: #clang, #llvm
Differential Revision: https://reviews.llvm.org/D63742
llvm-svn: 364468
Diffstat (limited to 'llvm/lib/Transforms')
| -rw-r--r-- | llvm/lib/Transforms/Instrumentation/AddressSanitizer.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/llvm/lib/Transforms/Instrumentation/AddressSanitizer.cpp b/llvm/lib/Transforms/Instrumentation/AddressSanitizer.cpp index 3190060761d..6821e214e92 100644 --- a/llvm/lib/Transforms/Instrumentation/AddressSanitizer.cpp +++ b/llvm/lib/Transforms/Instrumentation/AddressSanitizer.cpp @@ -109,6 +109,7 @@ static const uint64_t kNetBSD_ShadowOffset64 = 1ULL << 46; static const uint64_t kNetBSDKasan_ShadowOffset64 = 0xdfff900000000000; static const uint64_t kPS4CPU_ShadowOffset64 = 1ULL << 40; static const uint64_t kWindowsShadowOffset32 = 3ULL << 28; +static const uint64_t kEmscriptenShadowOffset = 0; static const uint64_t kMyriadShadowScale = 5; static const uint64_t kMyriadMemoryOffset32 = 0x80000000ULL; @@ -433,6 +434,7 @@ static ShadowMapping getShadowMapping(Triple &TargetTriple, int LongSize, bool IsWindows = TargetTriple.isOSWindows(); bool IsFuchsia = TargetTriple.isOSFuchsia(); bool IsMyriad = TargetTriple.getVendor() == llvm::Triple::Myriad; + bool IsEmscripten = TargetTriple.isOSEmscripten(); ShadowMapping Mapping; @@ -454,6 +456,8 @@ static ShadowMapping getShadowMapping(Triple &TargetTriple, int LongSize, Mapping.Offset = kDynamicShadowSentinel; else if (IsWindows) Mapping.Offset = kWindowsShadowOffset32; + else if (IsEmscripten) + Mapping.Offset = kEmscriptenShadowOffset; else if (IsMyriad) { uint64_t ShadowOffset = (kMyriadMemoryOffset32 + kMyriadMemorySize32 - (kMyriadMemorySize32 >> Mapping.Scale)); |
