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Author SHA1 Message Date
Kostya Serebryany 0dd9ec77d1 [libFuzzer] more refactoring of the Mutator and adding tests to it 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@243818 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-08-01 02:23:06 +00:00
Kostya Serebryany 8d4c8061c9 [libFuzzer] start refactoring the Mutator and adding tests to it 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@243817 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-08-01 01:42:51 +00:00
Kostya Serebryany 427b5a50cf [libFuzzer] limit the size of the inputs printed to stderr 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@243795 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-07-31 22:07:17 +00:00
Kostya Serebryany cab56781b5 [libFuzzer] minimal documentation on data-flow-guided fuzzing 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@243793 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-07-31 21:48:10 +00:00
Kostya Serebryany f7aa7e6f49 [libFuzzer] make sure that 2-byte arguments of switch() are handled properly 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@243781 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-07-31 20:58:55 +00:00
Kostya Serebryany 207cfe14a9 [libFuzzer] record traces from the switch statements only when told to do so 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@243768 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-07-31 18:09:08 +00:00
Kostya Serebryany 26e09e2da5 [libFuzzer] support switch interception in dfsan mode 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@243760 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-07-31 17:05:05 +00:00
Kostya Serebryany 02c18f4db9 [libFuzzer] trace switch statements and apply mutations based on the expected case values 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@243726 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-07-31 01:33:06 +00:00
Kostya Serebryany dd6dcb6cee [libFuzzer] fix the strncmp interceptor -- it should respect short strings. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@243691 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-07-30 21:22:22 +00:00
Kostya Serebryany 11186e1752 [libFuzzer] implement strncmp hook for data-flow-guided fuzzing (w/ and w/o dfsan), add a test 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@243611 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-07-30 02:33:45 +00:00
Kostya Serebryany c01d39e6b8 [libFuzzer] implement memcmp hook for data-flow-guided fuzzing (w/o dfsan), extend the memcmp fuzzer test 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@243603 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-07-30 01:34:58 +00:00
Kostya Serebryany c830cebe1f [libFuzzer] ensure that the dfsan tracing hooks actually run (using -verbosity=3 in tests) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@243365 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-07-28 01:25:00 +00:00
Kostya Serebryany 322fda4b3e [libFuzzer] when using cmp traces, first check that the CMP is evaluated to one value much more frequently than to the other value (heuristic) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@243363 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-07-28 00:59:53 +00:00
Kostya Serebryany 33a9a09cd7 [libFuzzer] allow users to supply their own implementation of rand 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@243078 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-07-24 01:06:40 +00:00
Kostya Serebryany 6cbc095f13 [libFuzzer] dump long running units to disk 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@243031 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-07-23 18:37:22 +00:00
Kostya Serebryany f69bb85171 [libFuzzer] require the files and directories passed to the fuzzer to exist 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@242596 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-07-18 00:03:37 +00:00
Kostya Serebryany 63da212749 [lib/Fuzzer] make assertions more informative and update comments for the user-supplied mutator 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@238658 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-05-30 17:33:13 +00:00
Kostya Serebryany 873d4e200d [lib/Fuzzer] relax an assertion 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@238608 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-05-29 20:31:17 +00:00
Kostya Serebryany ea8a3963b4 [lib/Fuzzer] make the fuzzing timeout 1200 seconds by default (was: infinity) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@238251 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-05-26 20:57:47 +00:00
Kostya Serebryany e4af3b4160 [lib/Fuzzer] fix docs 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@238236 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-05-26 19:32:52 +00:00
Kostya Serebryany f580f3683c [lib/Fuzzer] fix build with assertions 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@238235 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-05-26 19:29:33 +00:00
Kostya Serebryany 762dbd0574 [lib/Fuzzer] doxygen-ify the comments for the user interface 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@238086 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-05-23 02:12:05 +00:00
Kostya Serebryany d434a0a1b2 [lib/Fuzzer] fully get rid of std::cerr in libFuzzer 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@238081 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-05-23 01:22:35 +00:00
Kostya Serebryany 4ea4cb3197 [lib/Fuzzer] start getting rid of std::cerr. Sadly, these parts of C++ library used in libFuzzer badly interract with the same code used in the target function and also with dfsan. It's easier to just not use std::cerr than to defeat these issues. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@238078 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-05-23 01:07:46 +00:00
Kostya Serebryany 464deacf05 [lib/Fuzzer] remove -use_coverage_pairs=1, an experimental feature that is unlikely to ever scale 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@238063 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-05-22 22:47:03 +00:00
Kostya Serebryany b3fdcb3739 [lib/Fuzzer] mention the user-supplied mutators 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@238062 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-05-22 22:43:05 +00:00
Kostya Serebryany ebada2c2bc [lib/Fuzzer] extend the fuzzer interface to allow user-supplied mutators 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@238059 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-05-22 22:35:31 +00:00
Kostya Serebryany c9389db422 [lib/Fuzzer] ignore flags that start with --; use git pull --rebase instead of just git pull 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237950 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-05-21 20:39:13 +00:00
Kostya Serebryany b753a30d3b [lib/Fuzzer] more docs 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237836 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-05-20 21:03:03 +00:00
Kostya Serebryany 556425f9a9 [lib/Fuzzer] change the meaning of -timeout flag: now timeout is applied to every unit of work separately 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237735 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-05-19 22:12:57 +00:00
Kostya Serebryany 3b3cbed1b0 [lib/Fuzzer] more efficient reload logic; also don't spam git too much 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237649 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-05-19 01:06:07 +00:00
Kostya Serebryany 05ef67b6b9 [lib/Fuzzer] when -sync_command=<CMD> is given, periodically execute 'CMD CORPUS' to synchronize with other processes 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237617 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-05-18 21:34:20 +00:00
Kostya Serebryany 6f1b9541ba [lib/Fuzzer] Add SHA1 implementation from public domain. 
Summary:
This adds a SHA1 implementation taken from public domain code.
The change is trivial, but as it involves third-party code I'd like
a second pair of eyes before commit.

LibFuzzer can not use SHA1 from openssl because openssl may not be available
and because we may be fuzzing openssl itself.
Using sha1sum via a pipe is too slow.

Test Plan: n/a

Reviewers: chandlerc

Reviewed By: chandlerc

Subscribers: majnemer, llvm-commits

Differential Revision: http://reviews.llvm.org/D9733

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237400 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-05-14 22:41:49 +00:00
Kostya Serebryany 933e6287fe [lib/Fuzzer] update docs about test corpuses in git 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237308 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-05-13 22:42:28 +00:00
Kostya Serebryany 2727b58c88 [lib/Fuzzer] enable -use_counters=1 by default 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237272 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-05-13 18:31:46 +00:00
Kostya Serebryany a5a1b190d8 [lib/Fuzzer] A simple script to synchronise a fuzz test corpus with an external git repository. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237208 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-05-12 23:19:12 +00:00
Kostya Serebryany b8a0c0ecb3 [lib/Fuzzer] use sha1sum for the file hash 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237198 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-05-12 22:03:34 +00:00
Kostya Serebryany eaba2dd2f1 [lib/Fuzzer] guess the right number of workers if -jobs=N is given but -workers=M is not. Update the docs. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237163 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-05-12 18:51:57 +00:00
Kostya Serebryany de65922947 [lib/Fuzzer] remove the -dfsan=1 flag, just use -use_traces=1 (w/ or w/o dfsan) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237083 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-05-12 01:58:34 +00:00
Kostya Serebryany 772410aef6 [lib/Fuzzer] detach the pulse thread instad of joining it 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237082 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-05-12 01:43:20 +00:00
Kostya Serebryany 66c6a4c240 [lib/Fuzzer] don't record traces when trace collection is off 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237067 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-05-11 23:25:28 +00:00
Kostya Serebryany 1d4481df82 [lib/Fuzzer] when running multiple fuzzing processes, print something every 10 minutes to avoid buildbot timeouts 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237054 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-05-11 21:31:51 +00:00
Kostya Serebryany 051ef86497 [lib/Fuzzer] rename FuzzerDFSan.cpp to FuzzerTraceState.cpp; update comments. NFC expected 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237050 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-05-11 21:16:27 +00:00
Kostya Serebryany 0cdb698aae [lib/Fuzzer] add a trace-based mutatation logic. Same idea as with DFSan-based mutator, but instead of relying on taint tracking, try to find the data directly in the input. More (logic and comments) to go. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237043 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-05-11 20:51:19 +00:00
Kostya Serebryany 5ba2a0b8b0 [lib/Fuzzer] build tests that work well with dfsan also w/o dfsan 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@236909 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-05-08 21:45:19 +00:00
Kostya Serebryany 8ae273d380 [lib/Fuzzer] use -fsanitize-coverage=trace-cmp when building LLVM with LLVM_USE_SANITIZE_COVERAGE; in lib/Fuzzer try to reload the corpus to pick up new units from other processes 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@236906 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-05-08 21:30:55 +00:00
Kostya Serebryany 6564ee8933 [lib/Fuzzer] change the way we use taint information for fuzzing. Now, we run a single unit and collect suggested mutations based on tracing+taint data, then apply the suggested mutations one by one. The previous scheme was slower and more complex. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@236772 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-05-07 21:02:11 +00:00
Kostya Serebryany 46fa0aabcb [lib/Fuzzer] minor refactoring/simplification, NFC 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@236757 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-05-07 18:32:29 +00:00
Kostya Serebryany 49204878d7 [lib/Fuzzer] add dfsan_weak_hook_memcmp, enable the test that uses it, simplify the test runner 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@236683 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-05-07 00:11:33 +00:00
Kostya Serebryany 8434a039e2 [lib/Fuzzer] remove dfsan_fuzzer_abi.list -- its contents are now moved to dfsan proper 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@236659 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-05-06 22:47:24 +00:00
Kostya Serebryany b350776f03 [lib/Fuzzer] add a fuzzer test for memcmp (does not work yet) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@236656 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-05-06 22:36:00 +00:00
Kostya Serebryany b6ca45c39f [lib/Fuzzer] rename TestOneInput to LLVMFuzzerTestOneInput to make it more unique 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@236652 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-05-06 22:19:00 +00:00
Kostya Serebryany 605f316258 [lib/Fuzzer] on crash print the contents of the crashy input as base64 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@236548 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-05-05 21:59:51 +00:00
Kostya Serebryany 3784f79d64 [lib/Fuzzer] use handle_abort=1 by default so that when assert() fires we save the test case 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@236476 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-05-05 01:42:55 +00:00
Kostya Serebryany f3a664fc2e [lib/Fuzzer] Section: How good is my fuzzer? 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@234571 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-04-10 06:32:29 +00:00
Kostya Serebryany 3e35db6c50 [lib/Fuzzer] explain compatibility with AFL 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@234570 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-04-10 05:44:43 +00:00
Kostya Serebryany e32bb4cb81 [lib/Fuzzer] show how to find Heartbleed with LibFuzzer 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@234391 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-04-08 06:16:11 +00:00
Kostya Serebryany 01055ec7e3 [fuzzer] document the -tokens flag. Also change the diagnostic output 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@233842 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-04-01 21:33:20 +00:00
Kostya Serebryany 58bc60892e [fuzzer] more documentation 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@233763 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-03-31 21:39:38 +00:00
Kostya Serebryany 3399e1fd73 [fuzzer] Add support for token-based fuzzing (e.g. for C++). Allow string flags. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@233745 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-03-31 20:13:20 +00:00
Kostya Serebryany 3506457311 Move lib/Fuzzer docs from a README.txt to a proper .rst file. 
Summary:
Move lib/Fuzzer docs from a README.txt to a proper .rst file.
This change does not add any content, just formatting.

Test Plan: n/a

Reviewers: samsonov

Reviewed By: samsonov

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D8710

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@233638 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-03-30 23:05:30 +00:00
Kostya Serebryany e6d25ad0e0 [fuzzer] when a single unit takes over 1 second to run and it is the slowest one so far, print it. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@233637 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-03-30 23:04:35 +00:00
Kostya Serebryany b0b7c53ee4 [fuzzer] print various stats in a unified way 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@233624 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-03-30 22:44:03 +00:00
Kostya Serebryany 29c6bd6e4f DFSan-based fuzzer (proof of concept). 
Summary:
This adds a simple DFSan-based (i.e. taint-guided) fuzzer mutator,
see the comments for details.

Test Plan: a test added

Reviewers: samsonov, pcc

Reviewed By: samsonov, pcc

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D8669

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@233613 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-03-30 22:09:51 +00:00
Kostya Serebryany a1ea57a185 [sanitizer] experimental tracing for cmp instructions 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@232873 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-03-21 01:29:36 +00:00
Kostya Serebryany 0e5ec02e1e [asan] remove redundant ifndefs. NFC 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@232521 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-03-17 19:13:23 +00:00
Kostya Serebryany 935a3aa5bc [sanitizer] fix instrumentation with -mllvm -sanitizer-coverage-block-threshold=0 to actually do something useful. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@231736 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-03-10 01:58:27 +00:00
Kostya Serebryany a7b107bc82 [sanitizer] decrease sanitizer-coverage-block-threshold from 1000 to 500 as another horrible workaround for PR17409 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@231733 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-03-10 01:11:53 +00:00
Kostya Serebryany c2f4077b88 [sanitizer] add nosanitize metadata to more coverage instrumentation instructions 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@231333 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-03-05 01:20:05 +00:00
Kostya Serebryany ae0620c4e9 [sanitizer/coverage] Add AFL-style coverage counters (search heuristic for fuzzing). 
Introduce -mllvm -sanitizer-coverage-8bit-counters=1
which adds imprecise thread-unfriendly 8-bit coverage counters.

The run-time library maps these 8-bit counters to 8-bit bitsets in the same way
AFL (http://lcamtuf.coredump.cx/afl/technical_details.txt) does:
counter values are divided into 8 ranges and based on the counter
value one of the bits in the bitset is set.
The AFL ranges are used here: 1, 2, 3, 4-7, 8-15, 16-31, 32-127, 128+.

These counters provide a search heuristic for single-threaded
coverage-guided fuzzers, we do not expect them to be useful for other purposes.

Depending on the value of -fsanitize-coverage=[123] flag,
these counters will be added to the function entry blocks (=1),
every basic block (=2), or every edge (=3).

Use these counters as an optional search heuristic in the Fuzzer library.
Add a test where this heuristic is critical.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@231166 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-03-03 23:27:02 +00:00
Kostya Serebryany f7c1020041 [fuzzer] one more experimental search mode: -use_coverage_pairs=1 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@229957 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-02-20 03:02:37 +00:00
Kostya Serebryany 6a75fe1912 [sanitizer] fix a test broken by r229940 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@229951 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-02-20 02:12:25 +00:00
Kostya Serebryany 727a6ee223 [sanitizer] when dumping the basic block trace, also dump the module names. Patch by Laszlo Szekeres 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@229940 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-02-20 00:30:44 +00:00
Kostya Serebryany ce7a848558 [fuzzer] split main() into FuzzerDriver() that takes a callback as a parameter and a tiny main() in a separate file 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@229882 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-02-19 18:45:37 +00:00
Kostya Serebryany 0b1ec08b77 [fuzzer] properly annotate fallthrough, add one more entry to FAQ 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@229880 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-02-19 18:21:12 +00:00
Kostya Serebryany 9b13b8c338 [fuzzer] move default sanitizer options to a separate file 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@228429 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-02-06 19:52:07 +00:00
Kostya Serebryany 5d85a10810 [fuzzer] add flag prefer_small_during_initial_shuffle, be a bit more verbose 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@228235 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-02-04 23:42:42 +00:00
Kostya Serebryany 46c638cfc8 [fuzzer] add -runs=N to limit the number of runs per session. Also, make sure we do some mutations w/o cross over. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@228214 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-02-04 22:20:09 +00:00
Kostya Serebryany eb884daa38 [fuzzer] make multi-process execution more verbose; fix mutation to actually respect mutation depth and to never produce empty units 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@228170 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-02-04 19:10:20 +00:00
Kostya Serebryany 8fa9947e4d [fuzzer]: fix exit code, add more diagnostics 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@228103 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-02-04 01:22:57 +00:00
Kostya Serebryany 0013784dd3 [sanitizer] add another workaround for PR 17409: when over a threshold emit coverage instrumentation as calls. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@228102 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-02-04 01:21:45 +00:00
Kostya Serebryany 04e540582b [fuzzer] Add proper dependensices to the fuzzer tests 
Summary: Make sure that FileCheck is built when running check-fuzzer

Test Plan:
run on bot:
lab.llvm.org:8011/builders/sanitizer-x86_64-linux-fuzzer

Reviewers: samsonov

Reviewed By: samsonov

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D7387

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@228045 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-02-03 21:57:32 +00:00
Kostya Serebryany 32a12b924e [fuzzer] update the include line to use the new header name 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@228018 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-02-03 19:42:05 +00:00
Kostya Serebryany a1667be228 [fuzzer] add flags to run fuzzer in multiple parallel processes 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@227664 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-01-31 01:14:40 +00:00
Kostya Serebryany 05efde62f5 [fuzzer] Add a gtest-style test 
Summary: Add one gtest-style test.

Test Plan: run on bot

Reviewers: samsonov

Reviewed By: samsonov

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D7287

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@227639 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-01-30 23:26:57 +00:00
Kostya Serebryany 4ac4c33f2d [fuzzer] add -use_full_coverage_set=1 which solves FullCoverageSetTest. This does not scale very well yet, but might be a good start. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@227507 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-01-29 23:01:07 +00:00
Kostya Serebryany df31d7bea7 [fuzzer] fix warning in a test 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@227478 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-01-29 18:13:36 +00:00
Kostya Serebryany c8f69d069e [fuzzer] minor cleanup based on reviews: remove redundant includes, fix a copy-pasto in tests 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@227468 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-01-29 17:16:23 +00:00
Kostya Serebryany a51685f651 [fuzzer] add FAQ section to the README.txt 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@227466 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-01-29 17:11:30 +00:00
Kostya Serebryany 1f3043175c [fuzzer] add option -save_minimized_corpus 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@227395 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-01-28 23:48:39 +00:00
Kostya Serebryany 408796c672 Add lit-style tests for the Fuzzer library 
Summary: Add test targets and the lit-style runner.

Test Plan: Run the tests on bot.

Reviewers: samsonov

Reviewed By: samsonov

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D7217

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@227389 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-01-28 22:49:25 +00:00
Kostya Serebryany b0f9090173 [fuzzer] instructions for building/running clang-format-fuzzer 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@227357 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-01-28 19:51:58 +00:00
Kostya Serebryany 556d1a3b80 [fuzzer] properly enable asan's coverage feedback 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@227254 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-01-27 22:19:55 +00:00
Kostya Serebryany c9baf3befb Add a Fuzzer library 
Summary:
A simple genetic in-process coverage-guided fuzz testing library.

I've used this fuzzer to test clang-format
(it found 12+ bugs, thanks djasper@ for the fixes!)
and it may also help us test other parts of LLVM.
So why not keep it in the LLVM repository?

I plan to add the cmake build rules later (in a separate patch, if that's ok)
and also add a clang-format-fuzzer target.

See README.txt for details.

Test Plan: Tests will follow separately.

Reviewers: djasper, chandlerc, rnk

Reviewed By: rnk

Subscribers: majnemer, ygribov, dblaikie, llvm-commits

Differential Revision: http://reviews.llvm.org/D7184

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@227252 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-01-27 22:08:41 +00:00
Kostya Serebryany ed9cdced00 Add cmake flag LLVM_USE_SANITIZE_COVERAGE 
Summary:
When LLVM_USE_SANITIZE_COVERAGE=YES
and one of the sanitizers is used -fsanitize-coverage=3 will be added
to build flag. This will be used to run a coverage-guided fuzzer on various
llvm libraries.

Test Plan: n/a

Reviewers: rnk

Reviewed By: rnk

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D7116

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@227216 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-01-27 17:59:28 +00:00
Kostya Serebryany 8c6ae1044a [asan] simplify the tracing code, make it use the same guard variables as coverage 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225103 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-01-03 00:54:43 +00:00
Kostya Serebryany dd890d5c5e [asan] change _sanitizer_cov_module_init to accept int* instead of int** 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@224999 91177308-0d34-0410-b5e6-96231b3b80d8
 2014-12-30 19:29:28 +00:00
Kostya Serebryany b69d796590 [asan] change the coverage collection scheme so that we can easily emit coverage for the entire process as a single bit set, and if coverage_bitset=1 actually emit that bitset 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@224789 91177308-0d34-0410-b5e6-96231b3b80d8
 2014-12-23 22:32:17 +00:00
Kostya Serebryany 1c97c5e8bd [sanitizer] allow -fsanitize-coverage=N w/ -fsanitize=leak, llvm part 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@224463 91177308-0d34-0410-b5e6-96231b3b80d8
 2014-12-17 21:50:04 +00:00
Kostya Serebryany 95aa8cab27 [sanitizer] prevent function call merging for sanitizer-coverage callbacks 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@224372 91177308-0d34-0410-b5e6-96231b3b80d8
 2014-12-16 21:24:15 +00:00