From c5e7f5624966aa4a83869ca4fceb4d7b96a22d34 Mon Sep 17 00:00:00 2001 From: Evgeniy Stepanov Date: Mon, 15 Jul 2019 20:02:23 +0000 Subject: 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 --- clang/lib/CodeGen/CodeGenModule.cpp | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'clang/lib/CodeGen/CodeGenModule.cpp') diff --git a/clang/lib/CodeGen/CodeGenModule.cpp b/clang/lib/CodeGen/CodeGenModule.cpp index ba501d645c2c..7ab960e8bcee 100644 --- a/clang/lib/CodeGen/CodeGenModule.cpp +++ b/clang/lib/CodeGen/CodeGenModule.cpp @@ -2239,9 +2239,11 @@ bool CodeGenModule::isInSanitizerBlacklist(llvm::GlobalVariable *GV, SourceLocation Loc, QualType Ty, StringRef Category) const { // For now globals can be blacklisted only in ASan and KASan. - const SanitizerMask EnabledAsanMask = LangOpts.Sanitize.Mask & + const SanitizerMask EnabledAsanMask = + LangOpts.Sanitize.Mask & (SanitizerKind::Address | SanitizerKind::KernelAddress | - SanitizerKind::HWAddress | SanitizerKind::KernelHWAddress); + SanitizerKind::HWAddress | SanitizerKind::KernelHWAddress | + SanitizerKind::MemTag); if (!EnabledAsanMask) return false; const auto &SanitizerBL = getContext().getSanitizerBlacklist(); -- cgit v1.2.3