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/Driver/SanitizerArgs.cpp | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) (limited to 'clang/lib/Driver/SanitizerArgs.cpp') diff --git a/clang/lib/Driver/SanitizerArgs.cpp b/clang/lib/Driver/SanitizerArgs.cpp index 8d4b9fc85de..9132faa9176 100644 --- a/clang/lib/Driver/SanitizerArgs.cpp +++ b/clang/lib/Driver/SanitizerArgs.cpp @@ -40,7 +40,8 @@ static const SanitizerMask NeedsUnwindTables = static const SanitizerMask SupportsCoverage = SanitizerKind::Address | SanitizerKind::HWAddress | SanitizerKind::KernelAddress | SanitizerKind::KernelHWAddress | - SanitizerKind::Memory | SanitizerKind::KernelMemory | SanitizerKind::Leak | + SanitizerKind::MemTag | SanitizerKind::Memory | + SanitizerKind::KernelMemory | SanitizerKind::Leak | SanitizerKind::Undefined | SanitizerKind::Integer | SanitizerKind::ImplicitConversion | SanitizerKind::Nullability | SanitizerKind::DataFlow | SanitizerKind::Fuzzer | @@ -122,6 +123,7 @@ static void addDefaultBlacklists(const Driver &D, SanitizerMask Kinds, SanitizerMask Mask; } Blacklists[] = {{"asan_blacklist.txt", SanitizerKind::Address}, {"hwasan_blacklist.txt", SanitizerKind::HWAddress}, + {"memtag_blacklist.txt", SanitizerKind::MemTag}, {"msan_blacklist.txt", SanitizerKind::Memory}, {"tsan_blacklist.txt", SanitizerKind::Thread}, {"dfsan_abilist.txt", SanitizerKind::DataFlow}, @@ -420,7 +422,11 @@ SanitizerArgs::SanitizerArgs(const ToolChain &TC, SanitizerKind::Address | SanitizerKind::HWAddress | SanitizerKind::Leak | SanitizerKind::Thread | SanitizerKind::Memory | SanitizerKind::KernelAddress | - SanitizerKind::Scudo | SanitizerKind::SafeStack)}; + SanitizerKind::Scudo | SanitizerKind::SafeStack), + std::make_pair(SanitizerKind::MemTag, + SanitizerKind::Address | SanitizerKind::KernelAddress | + SanitizerKind::HWAddress | + SanitizerKind::KernelHWAddress)}; // Enable toolchain specific default sanitizers if not explicitly disabled. SanitizerMask Default = TC.getDefaultSanitizers() & ~AllRemove; -- cgit v1.2.3