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| author | Evgeniy Stepanov <eugeni.stepanov@gmail.com> | 2019-07-15 20:02:23 +0000 |
|---|---|---|
| committer | Evgeniy Stepanov <eugeni.stepanov@gmail.com> | 2019-07-15 20:02:23 +0000 |
| commit | c5e7f5624966aa4a83869ca4fceb4d7b96a22d34 (patch) | |
| tree | 8fde967efeea234ab6d74997c2748690f92c0949 /llvm/lib/Bitcode/Writer/BitcodeWriter.cpp | |
| parent | c5d7b0c4547263fd859e0c7be535575858fd312a (diff) | |
| download | llvm-c5e7f5624966aa4a83869ca4fceb4d7b96a22d34.zip llvm-c5e7f5624966aa4a83869ca4fceb4d7b96a22d34.tar.gz llvm-c5e7f5624966aa4a83869ca4fceb4d7b96a22d34.tar.bz2 | |
ARM MTE stack sanitizer.
Add "memtag" sanitizer that detects and mitigates stack memory issues
using armv8.5 Memory Tagging Extension.
It is similar in principle to HWASan, which is a software implementation
of the same idea, but there are enough differencies to warrant a new
sanitizer type IMHO. It is also expected to have very different
performance properties.
The new sanitizer does not have a runtime library (it may grow one
later, along with a "debugging" mode). Similar to SafeStack and
StackProtector, the instrumentation pass (in a follow up change) will be
inserted in all cases, but will only affect functions marked with the
new sanitize_memtag attribute.
Reviewers: pcc, hctim, vitalybuka, ostannard
Subscribers: srhines, mehdi_amini, javed.absar, kristof.beyls, hiraditya, cryptoad, steven_wu, dexonsmith, cfe-commits, llvm-commits
Tags: #clang, #llvm
Differential Revision: https://reviews.llvm.org/D64169
llvm-svn: 366123
Diffstat (limited to 'llvm/lib/Bitcode/Writer/BitcodeWriter.cpp')
| -rw-r--r-- | llvm/lib/Bitcode/Writer/BitcodeWriter.cpp | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp b/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp index a23b44f..5c7b970 100644 --- a/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp +++ b/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp @@ -723,6 +723,8 @@ static uint64_t getAttrKindEncoding(Attribute::AttrKind Kind) { return bitc::ATTR_KIND_Z_EXT; case Attribute::ImmArg: return bitc::ATTR_KIND_IMMARG; + case Attribute::SanitizeMemTag: + return bitc::ATTR_KIND_SANITIZE_MEMTAG; case Attribute::EndAttrKinds: llvm_unreachable("Can not encode end-attribute kinds marker."); case Attribute::None: |