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* reland [gtest] Fix printing of StringRef and SmallString in assert messages.Sam McCall2019-08-211-2/+2
| | | | | | | | | Renames GTEST_NO_LLVM_RAW_OSTREAM -> GTEST_NO_LLVM_SUPPORT and guards the new features behind it. This reverts commit a063bcf3ef5a879adbe9639a3c187d876eee0e66. llvm-svn: 369527
* [libFuzzer] in autofocus mode, give more weight to functions with DFTKostya Serebryany2019-06-141-1/+7
| | | | llvm-svn: 363473
* [libFuzzer] implement -focus_function=auto, to be used with Data Flow TracesKostya Serebryany2019-05-091-0/+86
| | | | llvm-svn: 360378
* [libFuzzer] fix the unit testsKostya Serebryany2019-02-151-6/+6
| | | | llvm-svn: 354088
* [libFuzzer] when doing the merge, keep track of the coveraged edges, not ↵Kostya Serebryany2019-02-141-25/+25
| | | | | | just features llvm-svn: 354076
* [libFuzzer] more refactoring; change some of the exit codes (timeout, OOM, ↵Kostya Serebryany2019-02-091-4/+6
| | | | | | interrupt) so that the parent process can distinguish those llvm-svn: 353584
* [libFuzzer] remove two unused experimental flagsKostya Serebryany2019-02-081-3/+0
| | | | llvm-svn: 353573
* [libFuzzer] introduce an experimental mode -fork=1, where fuzzing happens in ↵Kostya Serebryany2019-02-081-3/+3
| | | | | | a subprocess (still running multiple inputs per process), thus making the fuzzing more resilient to timeouts and OOMs. This is just a skeleton of the code, and some associated refactoring, not a fully working feature yet. llvm-svn: 353570
* Update the file headers across all of the LLVM projects in the monorepoChandler Carruth2019-01-191-2/+3
| | | | | | | | | | | | | | | | | to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
* [libFuzzer] Port to WindowsMatt Morehouse2018-08-301-0/+7
| | | | | | | | | | | | | | | | | | | | Summary: Port libFuzzer to windows-msvc. This patch allows libFuzzer targets to be built and run on Windows, using -fsanitize=fuzzer and/or fsanitize=fuzzer-no-link. It allows these forms of coverage instrumentation to work on Windows as well. It does not fix all issues, such as those with -fsanitize-coverage=stack-depth, which is not usable on Windows as of this patch. It also does not fix any libFuzzer integration tests. Nearly all of them fail to compile, fixing them will come in a later patch, so libFuzzer tests are disabled on Windows until them. Patch By: metzman Reviewers: morehouse, rnk Reviewed By: morehouse, rnk Subscribers: #sanitizers, delcypher, morehouse, kcc, eraman Differential Revision: https://reviews.llvm.org/D51022 llvm-svn: 341082
* Revert "[libFuzzer] Port to Windows"Matt Morehouse2018-08-291-7/+0
| | | | | | This reverts r340949 due to bot breakage again. llvm-svn: 340954
* [libFuzzer] Port to WindowsMatt Morehouse2018-08-291-0/+7
| | | | | | | | | | | | | | | | | | Summary: Port libFuzzer to windows-msvc. This patch allows libFuzzer targets to be built and run on Windows, using -fsanitize=fuzzer and/or fsanitize=fuzzer-no-link. It allows these forms of coverage instrumentation to work on Windows as well. It does not fix all issues, such as those with -fsanitize-coverage=stack-depth, which is not usable on Windows as of this patch. It also does not fix any libFuzzer integration tests. Nearly all of them fail to compile, fixing them will come in a later patch, so libFuzzer tests are disabled on Windows until them. Reviewers: morehouse, rnk Reviewed By: morehouse, rnk Subscribers: #sanitizers, delcypher, morehouse, kcc, eraman Differential Revision: https://reviews.llvm.org/D51022 llvm-svn: 340949
* Revert "[libFuzzer] Port to Windows"Matt Morehouse2018-08-281-7/+0
| | | | | | This reverts commit r340860 due to failing tests. llvm-svn: 340867
* [libFuzzer] Port to WindowsMatt Morehouse2018-08-281-0/+7
| | | | | | | | | | | | | | | | | | | | Summary: Port libFuzzer to windows-msvc. This patch allows libFuzzer targets to be built and run on Windows, using -fsanitize=fuzzer and/or fsanitize=fuzzer-no-link. It allows these forms of coverage instrumentation to work on Windows as well. It does not fix all issues, such as those with -fsanitize-coverage=stack-depth, which is not usable on Windows as of this patch. It also does not fix any libFuzzer integration tests. Nearly all of them fail to compile, fixing them will come in a later patch, so libFuzzer tests are disabled on Windows until them. Patch By: metzman Reviewers: morehouse, rnk Reviewed By: morehouse, rnk Subscribers: morehouse, kcc, eraman Differential Revision: https://reviews.llvm.org/D51022 llvm-svn: 340860
* [libFuzzer] first experimental attempt at DFT-based mutations ↵Kostya Serebryany2018-07-191-1/+2
| | | | | | (DFT=data-flow-trace) llvm-svn: 337434
* [libFuzzer] make the corpus elements aware of their data flow tracesKostya Serebryany2018-06-071-1/+2
| | | | llvm-svn: 334158
* [libFuzzer] initial implementation of -data_flow_trace. It parses the data ↵Kostya Serebryany2018-06-061-0/+8
| | | | | | flow trace and prints the summary, but doesn't use the information in any other way yet llvm-svn: 334058
* [libFuzzer] add an experimental flag -focus_function: libFuzzer will try to ↵Kostya Serebryany2018-05-161-1/+1
| | | | | | focus on inputs that trigger that function llvm-svn: 332554
* [LibFuzzer] Tweak `MutationDispatcher::Mutate_CopyPart` mutation.Dan Liew2018-04-241-0/+15
| | | | | | | | | | | | It doesn't make sense to non-deterministically choose between `CopyPart(..)` and `InsertPart(..)` when it is known that `InsertPart(..)` will fail. This upstream's a change from JFS solver's fork of LibFuzzer. Differential Revision: https://reviews.llvm.org/D45693 llvm-svn: 330687
* [LibFuzzer] Try to unbreak the `FuzzerMutate.ShuffleBytes1` unit test.Dan Liew2018-04-201-1/+1
| | | | | | | | | | | | | | This test is failing on my Linux box. Just increasing the number of iterations works around this. The divergence is likely due to our reliance on `std::shuffle()` which is not guaranteed to have the same behaviour across platforms. This is a strong argument for us to implement our own shuffle function to avoid divergence in behaviour across platforms. Differential Revision: https://reviews.llvm.org/D45767 llvm-svn: 330390
* [libFuzzer] Decrease stack usage in unit testsKostya Serebryany2017-12-061-26/+26
| | | | | | | | | | | | Summary: With 3 Dictionary objects, each containing space of ~16k DictionaryEntry objects, the MutationDispatcher object is fairly memory heavy. On platforms with a lower default stack size, this can cause panics in FuzzerUnittest as those tests stack-allocate the MutationDispatcher. This may be especially problematic for platforms that do not (yet) have a way to programmatically change their stack size, aside from link-time flags. In general, it seems more prudent to use the heap for an object of this size. Reviewers: kcc, morehouse Reviewed By: kcc Differential Revision: https://reviews.llvm.org/D40926 llvm-svn: 319988
* [libFuzzer] Make redirects happen in proper sequence.Matt Morehouse2017-12-051-1/+1
| | | | | | | "> file" must come before "2>&1" to have redirection occur correctly in all cases. Fixes a regression on minimize_two_crashes.test. llvm-svn: 319792
* [libFuzzer] Encapsulate commands in a class.Matt Morehouse2017-12-041-0/+160
| | | | | | | | | | | | | | | | | | | | | 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 llvm-svn: 319680
* [libFuzzer] Use custom allocators for STL containers in libFuzzer.George Karpenkov2017-08-271-14/+18
| | | | | | | | Avoids ODR violations causing spurious ASAN warnings. Differential Revision: https://reviews.llvm.org/D37086 llvm-svn: 311866
* Revert "[libFuzzer] Use custom allocators for STL containers in libFuzzer"George Karpenkov2017-08-261-10/+10
| | | | | | This reverts commit 3539efc2f2218dba2bcbd645d0fe276f2b5cf588. llvm-svn: 311831
* [libFuzzer] Use custom allocators for STL containers in libFuzzerGeorge Karpenkov2017-08-261-10/+10
| | | | | | | | Avoids ODR violations causing spurious ASAN container overflow warnings. Differential Revision: https://reviews.llvm.org/D37086 llvm-svn: 311830
* Move libFuzzer to compiler_rt.George Karpenkov2017-08-211-0/+768
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 llvm-svn: 311407
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