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| author | Matt Morehouse <mascasa@google.com> | 2018-06-27 18:24:46 +0000 |
|---|---|---|
| committer | Matt Morehouse <mascasa@google.com> | 2018-06-27 18:24:46 +0000 |
| commit | 8821a24acbcc05574ab65f3a49200d8f8b67f43b (patch) | |
| tree | c0e13a8266706f4e636dc7387fc24b45a9b99656 /docs | |
| parent | baa2648969e9ae86ed2b15fbd636e84454ee02ab (diff) | |
| download | clang-8821a24acbcc05574ab65f3a49200d8f8b67f43b.tar.gz | |
[UBSan] Add silence_unsigned_overflow flag.
Summary:
Setting UBSAN_OPTIONS=silence_unsigned_overflow=1 will silence all UIO
reports. This feature, combined with
-fsanitize-recover=unsigned-integer-overflow, is useful for providing
fuzzing signal without the excessive log output.
Helps with https://github.com/google/oss-fuzz/issues/910.
Reviewers: kcc, vsk
Reviewed By: vsk
Subscribers: vsk, kubamracek, Dor1s, llvm-commits
Differential Revision: https://reviews.llvm.org/D48660
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@335762 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/UndefinedBehaviorSanitizer.rst | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/docs/UndefinedBehaviorSanitizer.rst b/docs/UndefinedBehaviorSanitizer.rst index e9f85c24dd..8dd9157e81 100644 --- a/docs/UndefinedBehaviorSanitizer.rst +++ b/docs/UndefinedBehaviorSanitizer.rst @@ -180,6 +180,13 @@ will need to: ``UBSAN_OPTIONS=print_stacktrace=1``. #. Make sure ``llvm-symbolizer`` binary is in ``PATH``. +Silencing Unsigned Integer Overflow +=================================== +To silence reports from unsigned integer overflow, you can set +``UBSAN_OPTIONS=silence_unsigned_overflow=1``. This feature, combined with +``-fsanitize-recover=unsigned-integer-overflow``, is particularly useful for +providing fuzzing signal without blowing up logs. + Issue Suppression ================= |