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Summary:
Hook on -DKERNEL_USE (which is also used in lib/builtins) to not import
strlen and not rely on write() being implemented with the stderr on fd 2.
With this, the only requirements to use this library are:
- "Good enough" std::atomic<void*> and std::atomic<int>
- abort() being implemented
- ubsan_message(const char*) being implemented
Reviewers: eugenis
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D39791
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@320831 91177308-0d34-0410-b5e6-96231b3b80d8
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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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This eliminates a few inconsistencies between the symbol sets exported
by RTUBSan and RTUBSan_minimal:
* Handlers for nonnull_return were missing from the minimal RT, and
are now added in.
* The minimal runtime exported recoverable handlers for
builtin_unreachable and missing_return. These are not supposed to
exist, and are now removed.
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@313614 91177308-0d34-0410-b5e6-96231b3b80d8
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Summary:
Use runtime detection (with a weak-undef symbol) of
android_set_abort_message availability. Android NDK provides a single
version of the ASan runtime library to be used for any target API
level, which makes compile-time feature detection impossible (the
library itself is built at API level 9).
Reviewers: vitalybuka
Subscribers: srhines, llvm-commits, kubamracek
Differential Revision: https://reviews.llvm.org/D37716
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@312973 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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