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* [libFuzzer] Encapsulate commands in a class.Matt Morehouse2017-12-041-29/+37
| | | | | | | | | | | | | | | | | | | | | Summary: To be more portable (especially w.r.t. platforms without system()), commands should be managed programmatically rather than via string manipulation on the command line. This change introduces Fuzzer::Command, with methods to manage arguments and flags, set output options, and execute the command. Patch By: aarongreen Reviewers: kcc, morehouse Reviewed By: kcc, morehouse Subscribers: llvm-commits, mgorny Differential Revision: https://reviews.llvm.org/D40103 git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@319680 91177308-0d34-0410-b5e6-96231b3b80d8
* [libFuzzer] add a flag -malloc_limit_mbKostya Serebryany2017-12-011-0/+3
| | | | git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@319590 91177308-0d34-0410-b5e6-96231b3b80d8
* [libFuzzer] remove stale flags; NFCKostya Serebryany2017-12-011-1/+0
| | | | git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@319572 91177308-0d34-0410-b5e6-96231b3b80d8
* [libFuzzer] add an experimental search heuristic flag -reduce_depthKostya Serebryany2017-12-011-0/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@319571 91177308-0d34-0410-b5e6-96231b3b80d8
* [libFuzzer] handle SIGUSR1/SIGUSR2 and try to exit grafully on these signalsKostya Serebryany2017-11-091-0/+2
| | | | git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@317829 91177308-0d34-0410-b5e6-96231b3b80d8
* [libFuzzer] allow user to specify the merge control fileKostya Serebryany2017-11-091-8/+10
| | | | git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@317747 91177308-0d34-0410-b5e6-96231b3b80d8
* [libFuzzer] Periodically purge allocator's quarantine to prolong fuzzing ↵Alex Shlyapnikov2017-10-231-0/+1
| | | | | | | | | | | | | | | | | | | | | sessions. Summary: Fuzzing targets that allocate/deallocate a lot of memory tend to consume a lot of RSS when ASan quarantine is enabled. Purging quarantine between iterations and returning memory to OS keeps RSS down and should not reduce the quarantine effectiveness provided the fuzz target does not preserve state between iterations (in this case this feature can be turned off). Based on D39153. Reviewers: vitalybuka Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D39155 git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@316382 91177308-0d34-0410-b5e6-96231b3b80d8
* [libFuzzer] experimental flag to tweak the corpus distribution. Seems to ↵Kostya Serebryany2017-10-111-0/+1
| | | | | | improve the situation dramatically on the png benchmark and make things worse on a number of micro-puzzles. Needs more A/B testing git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@315407 91177308-0d34-0410-b5e6-96231b3b80d8
* [libFuzzer] Disable experimental clang coverage support by default.Max Moroz2017-10-051-0/+1
| | | | | | | | | | | | | | | | | Summary: It can be enabled via "-use_clang_coverage=1" flag. Reason for disabling: libFuzzer resets Clang Counters and makes it impossible to generate coverage report for a regular fuzz target (i.e. not standalone build). Reviewers: kcc Reviewed By: kcc Subscribers: kcc Differential Revision: https://reviews.llvm.org/D38604 git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@315029 91177308-0d34-0410-b5e6-96231b3b80d8
* [libFuzzer] minor refactoring, NFCKostya Serebryany2017-09-151-4/+2
| | | | git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@313406 91177308-0d34-0410-b5e6-96231b3b80d8
* [libFuzzer] refactoring: move reading the seed corpus closer to where it's ↵Kostya Serebryany2017-08-291-26/+12
| | | | | | consumed; NFC git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@311972 91177308-0d34-0410-b5e6-96231b3b80d8
* [libFuzzer] Use custom allocators for STL containers in libFuzzer.George Karpenkov2017-08-271-17/+17
| | | | | | | | Avoids ODR violations causing spurious ASAN warnings. Differential Revision: https://reviews.llvm.org/D37086 git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@311866 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert "[libFuzzer] Use custom allocators for STL containers in libFuzzer"George Karpenkov2017-08-261-16/+16
| | | | | | This reverts commit 3539efc2f2218dba2bcbd645d0fe276f2b5cf588. git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@311831 91177308-0d34-0410-b5e6-96231b3b80d8
* [libFuzzer] Use custom allocators for STL containers in libFuzzerGeorge Karpenkov2017-08-261-16/+16
| | | | | | | | Avoids ODR violations causing spurious ASAN container overflow warnings. Differential Revision: https://reviews.llvm.org/D37086 git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@311830 91177308-0d34-0410-b5e6-96231b3b80d8
* [libFuzzer] add -print_funcs=1 (on bey default): print newly discovered ↵Kostya Serebryany2017-08-251-0/+1
| | | | | | functions during fuzzing git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@311797 91177308-0d34-0410-b5e6-96231b3b80d8
* Move libFuzzer to compiler_rt.George Karpenkov2017-08-211-0/+764
Resulting library binaries will be named libclang_rt.fuzzer*, and will be placed in Clang toolchain, allowing redistribution. Differential Revision: https://reviews.llvm.org/D36908 git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@311407 91177308-0d34-0410-b5e6-96231b3b80d8
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