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Summary:
Use -nodefaultlibs.
Replace std:atomic with sanitizer atomics.
Reviewers: vitalybuka, kongyi, EricWF
Subscribers: mgorny, llvm-commits
Differential Revision: https://reviews.llvm.org/D39934
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@317969 91177308-0d34-0410-b5e6-96231b3b80d8
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Testing: check-ubsan-minimal
Differential Revision: https://reviews.llvm.org/D37646
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@312959 91177308-0d34-0410-b5e6-96231b3b80d8
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Should un-break this bot:
http://green.lab.llvm.org/green//job/clang-stage1-configure-RA_build/38264/consoleFull
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@312036 91177308-0d34-0410-b5e6-96231b3b80d8
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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
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