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| author | Evgeniy Stepanov <eugeni.stepanov@gmail.com> | 2017-08-29 20:03:51 +0000 |
|---|---|---|
| committer | Evgeniy Stepanov <eugeni.stepanov@gmail.com> | 2017-08-29 20:03:51 +0000 |
| commit | 440c0242b3e8488d6c6ba31e692c87fdd47fb0af (patch) | |
| tree | 2ae49fc587a397c9241494134f353f982fcefab1 /cmake/config-ix.cmake | |
| parent | 79654fd7716284ec881606e177a409608e8c4ede (diff) | |
Minimal runtime for UBSan.
Summary:
An implementation of ubsan runtime library suitable for use in production.
Minimal attack surface.
* No stack traces.
* Definitely no C++ demangling.
* No UBSAN_OPTIONS=log_file=/path (very suid-unfriendly). And no UBSAN_OPTIONS in general.
* as simple as possible
Minimal CPU and RAM overhead.
* Source locations unnecessary in the presence of (split) debug info.
* Values and types (as in A+B overflows T) can be reconstructed from register/stack dumps, once you know what type of error you are looking at.
* above two items save 3% binary size.
When UBSan is used with -ftrap-function=abort, sometimes it is hard to reason about failures. This library replaces abort with a slightly more informative message without much extra overhead. Since ubsan interface in not stable, this code must reside in compiler-rt.
Reviewers: pcc, kcc
Subscribers: srhines, mgorny, aprantl, krytarowski, llvm-commits
Differential Revision: https://reviews.llvm.org/D36810
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@312029 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'cmake/config-ix.cmake')
| -rw-r--r-- | cmake/config-ix.cmake | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/cmake/config-ix.cmake b/cmake/config-ix.cmake index 4ba284e69..c53715f53 100644 --- a/cmake/config-ix.cmake +++ b/cmake/config-ix.cmake @@ -470,7 +470,7 @@ else() set(OS_NAME "${CMAKE_SYSTEM_NAME}") endif() -set(ALL_SANITIZERS asan;dfsan;msan;tsan;safestack;cfi;esan;scudo) +set(ALL_SANITIZERS asan;dfsan;msan;tsan;safestack;cfi;esan;scudo;ubsan_minimal) set(COMPILER_RT_SANITIZERS_TO_BUILD all CACHE STRING "sanitizers to build if supported on the target (all;${ALL_SANITIZERS})") list_replace(COMPILER_RT_SANITIZERS_TO_BUILD all "${ALL_SANITIZERS}") @@ -545,6 +545,13 @@ else() set(COMPILER_RT_HAS_UBSAN FALSE) endif() +if (COMPILER_RT_HAS_SANITIZER_COMMON AND UBSAN_SUPPORTED_ARCH AND + OS_NAME MATCHES "Darwin|Linux|FreeBSD|NetBSD|Android") + set(COMPILER_RT_HAS_UBSAN_MINIMAL TRUE) +else() + set(COMPILER_RT_HAS_UBSAN_MINIMAL FALSE) +endif() + if (COMPILER_RT_HAS_SANITIZER_COMMON AND SAFESTACK_SUPPORTED_ARCH AND OS_NAME MATCHES "Darwin|Linux|FreeBSD|NetBSD") set(COMPILER_RT_HAS_SAFESTACK TRUE) |