9 Commits

Author SHA1 Message Date
Vitaly Buka
83daa29a86 Revert "[libFuzzer] Use ChooseUnitIdxToMutate to pick item for crossover."
Fails LLVMFuzzer.LLVMFuzzer.value-profile-strncmp.test.

This reverts commit r297891.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@297912 91177308-0d34-0410-b5e6-96231b3b80d8
2017-03-15 23:08:18 +00:00
Vitaly Buka
e925a388a3 [libFuzzer] Use ChooseUnitIdxToMutate to pick item for crossover.
Differential Revision: https://reviews.llvm.org/D30683

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@297891 91177308-0d34-0410-b5e6-96231b3b80d8
2017-03-15 20:59:27 +00:00
Vitaly Buka
c3e4809203 [fuzzer] Don't crash if LLVMFuzzerMutate was called by CustomCrossOver
Reviewers: kcc

Subscribers: llvm-commits, mgorny

Differential Revision: https://reviews.llvm.org/D30682

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@297202 91177308-0d34-0410-b5e6-96231b3b80d8
2017-03-07 20:37:38 +00:00
Kostya Serebryany
db5325aae3 [libFuzzer] use table of recent compares for memcmp/strcmp (to unify the code between cmp and memcmp handling)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@292287 91177308-0d34-0410-b5e6-96231b3b80d8
2017-01-17 23:09:05 +00:00
Kostya Serebryany
d4ebdc15e5 [libFuzzer] copy the options inside MutationDispatcher to avoid use-after-scope in mutator tests
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@292286 91177308-0d34-0410-b5e6-96231b3b80d8
2017-01-17 23:05:07 +00:00
Kostya Serebryany
d2c91bff2f [libFuzzer] simplify the code for use_cmp, also use the position hint when available, add a test
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@285049 91177308-0d34-0410-b5e6-96231b3b80d8
2016-10-25 02:04:43 +00:00
Kostya Serebryany
3af68729f8 [libFuzzer] add -trace_cmp=1 (guiding mutations based on the observed CMP instructions). This is a reincarnation of the previously deleted -use_traces, but using a different approach for collecting traces. Still a toy, but at least it scales well. Also fix -merge in trace-pc-guard mode
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@284273 91177308-0d34-0410-b5e6-96231b3b80d8
2016-10-14 20:20:33 +00:00
Kostya Serebryany
77ab75a9d6 [libFuzzer] more refactoring; NFC
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@282047 91177308-0d34-0410-b5e6-96231b3b80d8
2016-09-21 02:05:39 +00:00
Kostya Serebryany
2a546868cb [libFuzzer] refactoring: split the large header into many; NFC
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@282044 91177308-0d34-0410-b5e6-96231b3b80d8
2016-09-21 01:50:50 +00:00