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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 | 6d2b6f0a5f88cc27ee6d5e2d2744dee2a40bb457 (patch) | |
| tree | 6fc8cda0e7ffe09be7edb8f3ce228d3fe35194a5 /clang/lib/Frontend/InitPreprocessor.cpp | |
| parent | 75fa173e202c5418cc5f050a932e46b604afdb8e (diff) | |
| download | bcm5719-llvm-6d2b6f0a5f88cc27ee6d5e2d2744dee2a40bb457.tar.gz bcm5719-llvm-6d2b6f0a5f88cc27ee6d5e2d2744dee2a40bb457.zip | |
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
llvm-svn: 312029
Diffstat (limited to 'clang/lib/Frontend/InitPreprocessor.cpp')
0 files changed, 0 insertions, 0 deletions
