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78 Commits

Author SHA1 Message Date
Kostya Serebryany d50a3eedb4 [libFuzzer] make sure we find buffer overflow in the input buffer. Previously, re-using the same vector object was hiding buffer overflows (unless we used annotated vector) 
llvm-svn: 257701
 2016-01-13 23:02:30 +00:00
Kostya Serebryany b65805a939 [libFuzzer] change the way trace-based mutations are applied. Instead of a custom code just rely on the automatically created dictionary 
llvm-svn: 257248
 2016-01-09 03:08:58 +00:00
Kostya Serebryany c573316eee [libFuzzer] don't limit memcmp tracing with 8 bytes 
llvm-svn: 257245
 2016-01-09 01:39:55 +00:00
Kostya Serebryany 152ac7ad70 [libFuzzer] add a position hint to the dictionary-based mutator 
llvm-svn: 257013
 2016-01-07 01:49:35 +00:00
Mike Aizatsky 8b11f877e4 [libfuzzer] print_new_cov_pcs experimental option. 
Differential Revision: http://reviews.llvm.org/D15901

llvm-svn: 256882
 2016-01-06 00:21:22 +00:00
Kostya Serebryany 226b734d73 [libFuzzer] make trace-based fuzzing not crash in presence of threads 
llvm-svn: 256876
 2016-01-06 00:03:35 +00:00
Kostya Serebryany bf65644c97 [libFuzzer] split the tests to run them in parallel, remove one redundant test 
llvm-svn: 256085
 2015-12-19 03:35:30 +00:00
Kostya Serebryany 27ab2d759f [libFuzzer] make CrossOver just one of the other mutations 
llvm-svn: 256081
 2015-12-19 02:49:09 +00:00
Mike Aizatsky a1a5c69b57 [LibFuzzer] Introducing FUZZER_FLAG_UNSIGNED and using it for seeding. 
Differential Revision: http://reviews.llvm.org/D15339

done

llvm-svn: 255296
 2015-12-10 20:41:53 +00:00
Kostya Serebryany 9e48cda9bc [libFuzzer] compute base64 in-process instead of using an external lib. Since libFuzzer should not depend on anything, just re-implement base64 encoder. PR25746 
llvm-svn: 254784
 2015-12-04 22:29:39 +00:00
Mike Aizatsky 71552ce64b Libfuzzer: do not pass null into user function 
Differential Revision: http://reviews.llvm.org/D15098

llvm-svn: 254558
 2015-12-02 22:43:53 +00:00
Kostya Serebryany fba04273b7 [libFuzzer] add a test that is built with -fsanitize-coverage=trace-bb 
llvm-svn: 254484
 2015-12-02 02:49:37 +00:00
Kostya Serebryany 2d0ef14f5d [libFuzzer] add a flag -exact_artifact_path 
llvm-svn: 254100
 2015-11-25 21:40:46 +00:00
Kostya Serebryany dc3135db05 [libFuzzer] experimental flag -drill (another search heuristic; Mike Aizatsky's idea) 
llvm-svn: 252838
 2015-11-12 01:02:01 +00:00
Kostya Serebryany b7e286bed7 [libFuzzer] add UninstrumentedTest.cpp (missing from a previous commit) 
llvm-svn: 252658
 2015-11-10 22:02:56 +00:00
Kostya Serebryany 5eab74e9bc [libFuzzer] make libFuzzer link if there is no sanitizer coverage instrumentation (it will fail at start-up time) 
llvm-svn: 252533
 2015-11-09 23:17:45 +00:00
Kostya Serebryany 9cc3b0ddb6 [libFuzzer] add -merge flag to merge corpora 
llvm-svn: 251168
 2015-10-24 01:16:40 +00:00
Kostya Serebryany 2e9fca9f88 [libFuzzer] use the indirect caller-callee counter as an independent search heuristic 
llvm-svn: 251078
 2015-10-22 23:55:39 +00:00
Kostya Serebryany b36025619c [libFuzzer] remove the deprecated 'tokens' feature 
llvm-svn: 251069
 2015-10-22 21:48:09 +00:00
Kostya Serebryany d6edce97fb [libFuzzer] print a stack trace on timeout 
llvm-svn: 250571
 2015-10-16 23:04:31 +00:00
Kostya Serebryany b91c62b1f3 [libFuzzer] When -test_single_input crashes the test it is not necessary to write crash-file because input is already known to the user. Patch by Mike Aizatsky 
llvm-svn: 250564
 2015-10-16 22:41:47 +00:00
Kostya Serebryany bd5d1cdbb9 [libFuzzer] add -artifact_prefix flag 
llvm-svn: 249807
 2015-10-09 03:57:59 +00:00
Kostya Serebryany 20bb5e71b2 [libFuzzer] make LLVMFuzzerTestOneInput (the fuzzer target function) return int instead of void. The actual return value is not *yet* used (and expected to be 0). This change is API breaking, so the fuzzers will need to be updated. 
llvm-svn: 249214
 2015-10-02 23:34:06 +00:00
Kostya Serebryany 65d0a1458f [libFuzzer] remove experimental flag and functionality 
llvm-svn: 249194
 2015-10-02 22:00:32 +00:00
Kostya Serebryany b85db178a0 [libFuzzer] add a flag -max_total_time 
llvm-svn: 249181
 2015-10-02 20:47:55 +00:00
Ivan Krasin 95e82d5b48 [LibFuzzer] test_single_input option to run a single test case. 
-test_single_input flag specifies a file name with test data.

Review URL: http://reviews.llvm.org/D13359

Patch by Mike Aizatsky!

llvm-svn: 249096
 2015-10-01 23:23:06 +00:00
Ivan Krasin a610cb5ba0 [libFuzzer]Add a test for defeating a hash sum. 
Summary:
Add a test for a data followed by 4-byte hash value.
I use a slightly modified Jenkins hash function,
as described in https://en.wikipedia.org/wiki/Jenkins_hash_function

The modification is to ensure that hash(zeros) != 0.

Reviewers: kcc

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D12648

llvm-svn: 247076
 2015-09-08 21:22:52 +00:00
Kostya Serebryany 25425ad920 [libFuzzer] add one more mutator: Mutate_ChangeASCIIInteger 
llvm-svn: 247027
 2015-09-08 17:19:31 +00:00
Kostya Serebryany 7d21166218 [libFuzzer] actually make the dictionaries work (+docs) 
llvm-svn: 246825
 2015-09-04 00:12:11 +00:00
Kostya Serebryany ec2dcb1d91 [libFuzzer] refactor the mutation functions so that they are now methods of a class. NFC 
llvm-svn: 246808
 2015-09-03 21:24:19 +00:00
Kostya Serebryany 9838b2be87 [libFuzzer] adding a parser for AFL-style dictionaries + tests. 
llvm-svn: 246800
 2015-09-03 20:23:46 +00:00
Kostya Serebryany 6ea1b69fcf [libFuzzer] deprecate the -tokens flag. This was a bad idea because the corpus with this flag contains encrypted inputs, not the real inputs, which complicates interoperation with other fuzzers. Instead we'll need to implement AFL dictionary support 
llvm-svn: 246734
 2015-09-02 23:27:39 +00:00
Kostya Serebryany 12c7837381 [libFuzzer] add two flags, -tbm_depth and -tbm_width to control how the trace-based-mutations are applied 
llvm-svn: 244712
 2015-08-12 01:55:37 +00:00
Kostya Serebryany 242ca930e8 [libFuzzer] move the mutators to public interface so that custom mutators may reuse these functions directly 
llvm-svn: 244250
 2015-08-06 19:19:55 +00:00
Kostya Serebryany bf29ff2fa5 [libFuzzer] add one more mutation strategy: byte shuffling 
llvm-svn: 244188
 2015-08-06 01:29:13 +00:00
Kostya Serebryany 1ce0035bf0 [libFuzzer] add a missing test file 
llvm-svn: 244151
 2015-08-05 21:32:13 +00:00
Kostya Serebryany 7f4227d59a [libFuzzer] use data-flow feedback from strcmp 
llvm-svn: 244084
 2015-08-05 18:23:01 +00:00
Kostya Serebryany 86a5fba71d [libFuzzer] more refactoring of the Mutator and adding tests to it 
llvm-svn: 243818
 2015-08-01 02:23:06 +00:00
Kostya Serebryany 8ce7424e9c [libFuzzer] start refactoring the Mutator and adding tests to it 
llvm-svn: 243817
 2015-08-01 01:42:51 +00:00
Kostya Serebryany fe7e41e8f5 [libFuzzer] make sure that 2-byte arguments of switch() are handled properly 
llvm-svn: 243781
 2015-07-31 20:58:55 +00:00
Kostya Serebryany cd6a4665e0 [libFuzzer] support switch interception in dfsan mode 
llvm-svn: 243760
 2015-07-31 17:05:05 +00:00
Kostya Serebryany fb7d8d9d06 [libFuzzer] trace switch statements and apply mutations based on the expected case values 
llvm-svn: 243726
 2015-07-31 01:33:06 +00:00
Kostya Serebryany c9dc96bfc6 [libFuzzer] fix the strncmp interceptor -- it should respect short strings. 
llvm-svn: 243691
 2015-07-30 21:22:22 +00:00
Kostya Serebryany b74ba421fc [libFuzzer] implement strncmp hook for data-flow-guided fuzzing (w/ and w/o dfsan), add a test 
llvm-svn: 243611
 2015-07-30 02:33:45 +00:00
Kostya Serebryany 0e776a2250 [libFuzzer] implement memcmp hook for data-flow-guided fuzzing (w/o dfsan), extend the memcmp fuzzer test 
llvm-svn: 243603
 2015-07-30 01:34:58 +00:00
Kostya Serebryany ae7df1ca4d [libFuzzer] ensure that the dfsan tracing hooks actually run (using -verbosity=3 in tests) 
llvm-svn: 243365
 2015-07-28 01:25:00 +00:00
Kostya Serebryany 404c69f2c8 [libFuzzer] allow users to supply their own implementation of rand 
llvm-svn: 243078
 2015-07-24 01:06:40 +00:00
Kostya Serebryany 2b7d2e91cc [libFuzzer] dump long running units to disk 
llvm-svn: 243031
 2015-07-23 18:37:22 +00:00
Alexey Samsonov 4800c2de28 [Fuzzer] Rely on $PATH expansion instead of hardcoding paths in tests. NFC. 
llvm-svn: 242851
 2015-07-21 22:51:55 +00:00
Alexey Samsonov dc324e1644 [Fuzzer] Clearly separate regular and DFSan tests. NFC. 
llvm-svn: 242850
 2015-07-21 22:51:49 +00:00