af432a45e3
[libfuzzer] Trying random unit prefixes during corpus load.
...
Differential Revision: http://reviews.llvm.org/D20301
llvm-svn: 270632
2016-05-24 23:14:29 +00:00
3868e468fe
[LibFuzzer]
...
Work around crashes in ``__sanitizer_malloc_hook()`` under Mac OSX.
Under Mac OSX we intercept calls to malloc before thread local
storage is initialised leading to a crash when accessing
``AllocTracer``. To workaround this ``AllocTracer`` is only accessed
in the hook under Linux. For symmetry ``__sanitizer_free_hook()``
is also modified in the same way.
To support this change a set of new macros
LIBFUZZER_LINUX and LIBFUZZER_APPLE has been defined which can be
used to check the target being compiled for.
Differential Revision: http://reviews.llvm.org/D20402
llvm-svn: 270145
2016-05-19 22:00:33 +00:00
a0788e7dd4
[libFuzzer] do the merge faster and a bit less precise
...
llvm-svn: 269497
2016-05-13 22:11:23 +00:00
8b0d90a6d4
[libFuzzer] simplify FuzzerInterface.h
...
llvm-svn: 269448
2016-05-13 18:04:35 +00:00
1aa501e7e8
[libfuzzer] Refactoring coverage state-management code.
...
It is now less state-dependent and will allow easier comparing of
coverages of different units.
Differential Revision: http://reviews.llvm.org/D20085
llvm-svn: 269140
2016-05-10 23:43:15 +00:00
8b8f7a3cda
[libFuzzer] enhance -rss_limit_mb and enable by default. Now it will print the OOM reproducer.
...
llvm-svn: 268821
2016-05-06 23:38:07 +00:00
52b394e981
[libFuzzer] add exeprimental -rss_limit_mb flag to fight against OOMs
...
llvm-svn: 268807
2016-05-06 21:58:35 +00:00
7018a1aaa4
[libFuzzer] disable leak detection if we have tried it for 1000 times w/o finding a leak
...
llvm-svn: 267770
2016-04-27 19:52:34 +00:00
9ba19182be
[libFuzzer] remove dead code
...
llvm-svn: 267455
2016-04-25 19:41:45 +00:00
1bfd583d82
[libFuzzer] added -detect_leaks flag (0 by default for now). When enabled, it will help finding leaks while fuzzing
...
llvm-svn: 266838
2016-04-20 00:24:21 +00:00
ebb932d060
[libFuzzer] try to print correct time in seconds when reporting a timeout. Don't report timeouts while still loading the corpus.
...
llvm-svn: 266693
2016-04-18 22:50:39 +00:00
94e29668b0
[libfuzzer] defensive assert
...
llvm-svn: 265866
2016-04-08 23:32:24 +00:00
315167339e
[libFuzzer] don't report memory leaks if we are dying due to a timeout (just use _Exit instead of exit in the timeout callback)
...
llvm-svn: 264237
2016-03-24 01:32:08 +00:00
d96b0c14fb
[Fuzzer] Guard no_sanitize_memory attributes behind __has_feature.
...
Otherwise GCC fails to build it because it doesn't know the attribute.
llvm-svn: 263787
2016-03-18 14:19:19 +00:00
945761b8c2
[libFuzzer] improve -merge functionality
...
llvm-svn: 263769
2016-03-18 00:23:29 +00:00
c5575aabd6
[libFuzzer] deprecate several flags
...
llvm-svn: 263739
2016-03-17 19:59:39 +00:00
23dbc390af
[libFuzzer] add __attribute__((no_sanitize_memory)) to two functions that may be called from signal handler(s) or from msan. This will hopefully avoid msan false reports which I can't reproduce
...
llvm-svn: 263737
2016-03-17 19:42:35 +00:00
64d24578d8
[libFuzzer] try to use max_len based on the items of the corpus instead of blindly defaulting to 64 bytes.
...
llvm-svn: 263323
2016-03-12 01:57:04 +00:00
e483ed2825
[libFuzzer] when interrupted, call _Exit() instead of exit()
...
llvm-svn: 262667
2016-03-03 22:36:37 +00:00
3d95dd9149
[libFuzzer] deprecate exit_on_first flag
...
llvm-svn: 262417
2016-03-01 22:33:14 +00:00
228d5b1ce4
[libFuzzer] add generic signal handlers so that libFuzzer can report at least something if ASan is not handlig the signals for us. Remove abort_on_timeout flag.
...
llvm-svn: 262415
2016-03-01 22:19:21 +00:00
66ff0756e4
[libFuzzer] add -print_final_stats=1 flag
...
llvm-svn: 262084
2016-02-26 22:42:23 +00:00
da63c1d09a
[libFuzzer] initial implementation of path coverage based on -fsanitize-coverage=trace-pc. This does not scale well yet, but already cracks FullCoverageSetTest in seconds
...
llvm-svn: 262073
2016-02-26 21:33:56 +00:00
a35f7d383f
[libFuzzer] only read MaxLen bytes from every file in the corpus to speedup loading the corpus
...
llvm-svn: 261267
2016-02-18 21:49:10 +00:00
cfbcf9097d
[libFuzzer] don't timeout when loading the corpus. Be a bit more verbose when loading large corpus.
...
llvm-svn: 261143
2016-02-17 19:42:34 +00:00
8a5bef0fcf
[libFuzzer] remove std::vector operations from hot paths, NFC
...
llvm-svn: 260829
2016-02-13 17:56:51 +00:00
1deb0498f5
[libFuzzer] don't require seed in fuzzer::Mutate, instead use the global Fuzzer object for fuzzer::Mutate. This makes custom mutators fast
...
llvm-svn: 260810
2016-02-13 06:24:18 +00:00
7ec0c56e07
[libFuzzer] get rid of UserSuppliedFuzzer; NFC
...
llvm-svn: 260798
2016-02-13 03:25:16 +00:00
22cc5e2375
[libFuzzer] provide a plain C interface for custom mutators (experimental)
...
llvm-svn: 260794
2016-02-13 02:29:38 +00:00
b92602ada0
[libFuzzer] don't write the test unit when a leak is detected (since we don't know which unit causes the leak)
...
llvm-svn: 259731
2016-02-04 00:02:17 +00:00
54a6363a8f
[libFuzzer] add -timeout_exitcode option
...
llvm-svn: 259265
2016-01-29 23:30:07 +00:00
9768e7f06b
[libFuzzer] add -abort_on_timeout option
...
llvm-svn: 258631
2016-01-23 19:34:19 +00:00
df91910bd4
Use std::piecewise_constant_distribution instead of ad-hoc binary search.
...
Summary:
Fix the issue with the most recently discovered unit receiving much less attention.
Note: this is the second attempt (prev: r258473). Now, libc++ build is fixed.
Reviewers: aizatsky, kcc
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D16487
llvm-svn: 258571
2016-01-22 22:28:27 +00:00
d84f74cab7
Revert r258473 as it's breaking the build with libc++
...
Reviewers: kcc
Differential Revision: http://reviews.llvm.org/D16441
llvm-svn: 258479
2016-01-22 03:21:52 +00:00
b008fd4d89
Use std::piecewise_constant_distribution instead of ad-hoc binary search.
...
Summary:
Fix the issue with the most recently discovered unit receiving much less attention.
Note: I had to change the seed for one test to make it pass. Alternatively,
the number of runs could be increased. I believe that the average time of
'foo' discovery is not increased, just seed=1 was particularly convenient
for the previous PRNG scheme used.
Reviewers: aizatsky, kcc
Subscribers: llvm-commits, kcc
Differential Revision: http://reviews.llvm.org/D16419
llvm-svn: 258473
2016-01-22 01:32:34 +00:00
e313f8f8ff
[libfuzzer] use %p for printing addresses
...
llvm-svn: 258370
2016-01-21 00:02:09 +00:00
628bc3ec00
[libFuzzer] move some code from public interface header to a non-public header. NFC
...
llvm-svn: 257963
2016-01-16 00:04:36 +00:00
4b35874b2a
[libFuzzer] suggest a dictionary to the user of some of the trace-based dictionary entries were successful
...
llvm-svn: 257736
2016-01-14 02:36:44 +00:00
98abb2c90a
[libFuzzer] make CurrentUnit a POD object instead of vector to avoid extra allocations
...
llvm-svn: 257713
2016-01-13 23:46:01 +00:00
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
72fdb32dac
[libFuzzer] make sure to update CurrentUnit when drilling
...
llvm-svn: 257560
2016-01-13 01:58:27 +00:00
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
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
27ab2d759f
[libFuzzer] make CrossOver just one of the other mutations
...
llvm-svn: 256081
2015-12-19 02:49:09 +00:00
14c50288cc
[libFuzzer] print successfull mutations sequences
...
llvm-svn: 256071
2015-12-19 01:09:49 +00:00
8617aaaac2
[libFuzzer] don't reload the corpus more than once every second
...
llvm-svn: 254824
2015-12-05 02:09:22 +00:00
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
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
2d0ef14f5d
[libFuzzer] add a flag -exact_artifact_path
...
llvm-svn: 254100
2015-11-25 21:40:46 +00:00
2a48c24d77
[libFuzzer] make libFuzzer build even with a compiler that does not have sanitizer headers
...
llvm-svn: 253003
2015-11-13 01:54:40 +00:00
a9c2387192
output_csv libfuzzer option
...
Summary:
The option outputs statistics in CSV format preceded by 1 header line.
This is intended for machine processing of the output.
-verbosity=0 should likely be set.
Differential Revision: http://reviews.llvm.org/D14600
llvm-svn: 252856
2015-11-12 04:38:40 +00:00
dc3135db05
[libFuzzer] experimental flag -drill (another search heuristic; Mike Aizatsky's idea)
...
llvm-svn: 252838
2015-11-12 01:02:01 +00:00
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
b8d0da1386
[libFuzzer] print a bit fewer lines
...
llvm-svn: 252123
2015-11-05 01:19:42 +00:00
e692621a9d
[libFuzzer] when choosing the next unit to mutate, give some preference to the most recent units (they are more likely to be interesting)
...
llvm-svn: 252097
2015-11-04 23:22:25 +00:00
9cc3b0ddb6
[libFuzzer] add -merge flag to merge corpora
...
llvm-svn: 251168
2015-10-24 01:16:40 +00:00
94660b3c36
[libFuzzer] remove some old code; also make __sanitizer_get_total_unique_caller_callee_pairs weak so that newer libFuzzer works with older asan
...
llvm-svn: 251133
2015-10-23 18:37:58 +00:00
2e9fca9f88
[libFuzzer] use the indirect caller-callee counter as an independent search heuristic
...
llvm-svn: 251078
2015-10-22 23:55:39 +00:00
09d2a5f6e1
[libFuzzer] more refactoring the code that checks the coverage. NFC
...
llvm-svn: 251075
2015-10-22 22:56:45 +00:00
007c9b25f4
[libFuzzer] refactoring the code that checks the coverage. NFC
...
llvm-svn: 251074
2015-10-22 22:50:47 +00:00
b36025619c
[libFuzzer] remove the deprecated 'tokens' feature
...
llvm-svn: 251069
2015-10-22 21:48:09 +00:00
fed509e73d
[libFuzzer] add -shuffle flag
...
llvm-svn: 250603
2015-10-17 04:38:26 +00:00
d6edce97fb
[libFuzzer] print a stack trace on timeout
...
llvm-svn: 250571
2015-10-16 23:04:31 +00:00
a9da9b48ef
[libFuzzer] reduce the size of artifacts printed on the screen
...
llvm-svn: 250565
2015-10-16 22:47:20 +00:00
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
e95022ac14
[libFuzzer] don't print large artifacts to stderr
...
llvm-svn: 249808
2015-10-09 04:03:14 +00:00
bd5d1cdbb9
[libFuzzer] add -artifact_prefix flag
...
llvm-svn: 249807
2015-10-09 03:57:59 +00:00
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
65d0a1458f
[libFuzzer] remove experimental flag and functionality
...
llvm-svn: 249194
2015-10-02 22:00:32 +00:00
b85db178a0
[libFuzzer] add a flag -max_total_time
...
llvm-svn: 249181
2015-10-02 20:47:55 +00:00
dd02f1f8ab
[libFuzzer] perform fewer crossover operations compared to plain mutations
...
llvm-svn: 247364
2015-09-11 00:20:58 +00:00
468ed78434
[libFuzzer] remove -iterations as redundant (there is also -num_runs)
...
llvm-svn: 247030
2015-09-08 17:30:35 +00:00
7d21166218
[libFuzzer] actually make the dictionaries work (+docs)
...
llvm-svn: 246825
2015-09-04 00:12:11 +00:00
a9346c2e65
[libFuzzer] honour -only_ascii=1 when reading the initial corpus. Also, remove ugly #ifdef
...
llvm-svn: 246689
2015-09-02 19:08:08 +00:00
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
1688098cb5
[libFuzzer] add colons to the stats output to avoid confusion
...
llvm-svn: 244708
2015-08-12 01:04:27 +00:00
69ab31a3fa
Fix unused variable 'X' in release builds.
...
llvm-svn: 244571
2015-08-11 05:57:10 +00:00
bc7c0ad24d
[libFuzzer] add -only_ascii flag
...
llvm-svn: 244559
2015-08-11 01:44:42 +00:00
70926aed6b
[libFuzzer] add option -report_slow_units=Nsec to control when slow units are printed
...
llvm-svn: 244152
2015-08-05 21:43:48 +00:00
1165efdbf9
[libFuzzer] limit the size of the inputs printed to stderr
...
llvm-svn: 243795
2015-07-31 22:07:17 +00:00
404c69f2c8
[libFuzzer] allow users to supply their own implementation of rand
...
llvm-svn: 243078
2015-07-24 01:06:40 +00:00
2b7d2e91cc
[libFuzzer] dump long running units to disk
...
llvm-svn: 243031
2015-07-23 18:37:22 +00:00
2ea204e645
[lib/Fuzzer] make assertions more informative and update comments for the user-supplied mutator
...
llvm-svn: 238658
2015-05-30 17:33:13 +00:00
316b571007
[lib/Fuzzer] make the fuzzing timeout 1200 seconds by default (was: infinity)
...
llvm-svn: 238251
2015-05-26 20:57:47 +00:00
c8228dd9fb
[lib/Fuzzer] fix build with assertions
...
llvm-svn: 238235
2015-05-26 19:29:33 +00:00
7c180eafc1
[lib/Fuzzer] fully get rid of std::cerr in libFuzzer
...
llvm-svn: 238081
2015-05-23 01:22:35 +00:00
f3c7cb464e
[lib/Fuzzer] remove -use_coverage_pairs=1, an experimental feature that is unlikely to ever scale
...
llvm-svn: 238063
2015-05-22 22:47:03 +00:00
f342459aa4
[lib/Fuzzer] extend the fuzzer interface to allow user-supplied mutators
...
llvm-svn: 238059
2015-05-22 22:35:31 +00:00
490bbd6fa4
[lib/Fuzzer] change the meaning of -timeout flag: now timeout is applied to every unit of work separately
...
llvm-svn: 237735
2015-05-19 22:12:57 +00:00
cbb2334b7a
[lib/Fuzzer] more efficient reload logic; also don't spam git too much
...
llvm-svn: 237649
2015-05-19 01:06:07 +00:00
2da7b84852
[lib/Fuzzer] when -sync_command=<CMD> is given, periodically execute 'CMD CORPUS' to synchronize with other processes
...
llvm-svn: 237617
2015-05-18 21:34:20 +00:00
a8f01bc8e1
Code cleanup: Reindent Fuzzer::MutateAndTestOne.
...
llvm-svn: 237533
2015-05-17 02:44:31 +00:00
225262562f
[lib/Fuzzer] rename FuzzerDFSan.cpp to FuzzerTraceState.cpp; update comments. NFC expected
...
llvm-svn: 237050
2015-05-11 21:16:27 +00:00
1ac8055bc7
[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
...
llvm-svn: 236906
2015-05-08 21:30:55 +00:00
beb24c38e7
[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.
...
llvm-svn: 236772
2015-05-07 21:02:11 +00:00
7d470cfb0c
[lib/Fuzzer] minor refactoring/simplification, NFC
...
llvm-svn: 236757
2015-05-07 18:32:29 +00:00
ca6a2a2f1c
[lib/Fuzzer] on crash print the contents of the crashy input as base64
...
llvm-svn: 236548
2015-05-05 21:59:51 +00:00
52a788e503
[fuzzer] Add support for token-based fuzzing (e.g. for C++). Allow string flags.
...
llvm-svn: 233745
2015-03-31 20:13:20 +00:00
16901a901d
[fuzzer] when a single unit takes over 1 second to run and it is the slowest one so far, print it.
...
llvm-svn: 233637
2015-03-30 23:04:35 +00:00
03db8b9225
[fuzzer] print various stats in a unified way
...
llvm-svn: 233624
2015-03-30 22:44:03 +00:00
16d03bd051
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
llvm-svn: 233613
2015-03-30 22:09:51 +00:00
be5e0ed919
[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.
llvm-svn: 231166
2015-03-03 23:27:02 +00:00
2e3622bddd
[fuzzer] one more experimental search mode: -use_coverage_pairs=1
...
llvm-svn: 229957
2015-02-20 03:02:37 +00:00
016852c396
[fuzzer] split main() into FuzzerDriver() that takes a callback as a parameter and a tiny main() in a separate file
...
llvm-svn: 229882
2015-02-19 18:45:37 +00:00
92e0476c67
[fuzzer] add flag prefer_small_during_initial_shuffle, be a bit more verbose
...
llvm-svn: 228235
2015-02-04 23:42:42 +00:00
33f866922a
[fuzzer] add -runs=N to limit the number of runs per session. Also, make sure we do some mutations w/o cross over.
...
llvm-svn: 228214
2015-02-04 22:20:09 +00:00
5b266a8a23
[fuzzer] make multi-process execution more verbose; fix mutation to actually respect mutation depth and to never produce empty units
...
llvm-svn: 228170
2015-02-04 19:10:20 +00:00
fe43aa8d19
[fuzzer]: fix exit code, add more diagnostics
...
llvm-svn: 228103
2015-02-04 01:22:57 +00:00
4b96ce96c6
[fuzzer] update the include line to use the new header name
...
llvm-svn: 228018
2015-02-03 19:42:05 +00:00
2c1b33b897
[fuzzer] add -use_full_coverage_set=1 which solves FullCoverageSetTest. This does not scale very well yet, but might be a good start.
...
llvm-svn: 227507
2015-01-29 23:01:07 +00:00
6d768fcc18
[fuzzer] minor cleanup based on reviews: remove redundant includes, fix a copy-pasto in tests
...
llvm-svn: 227468
2015-01-29 17:16:23 +00:00
ef11698cac
Reverting r227452, which adds back the fuzzer library. Now excluding the fuzzer library based on LLVM_USE_SANITIZE_COVERAGE being set or unset.
...
llvm-svn: 227464
2015-01-29 16:58:29 +00:00
7b54ed221a
Temporarily reverting the fuzzer library as it causes too many build issues for MSVC users. This reverts: 227445, 227395, 227389, 227357, 227254, 227252
...
llvm-svn: 227452
2015-01-29 15:49:22 +00:00
265cf04f9c
[fuzzer] add option -save_minimized_corpus
...
llvm-svn: 227395
2015-01-28 23:48:39 +00:00
a8fbcf0c1f
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
llvm-svn: 227389
2015-01-28 22:49:25 +00:00
d53b43fe11
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
llvm-svn: 227252
2015-01-27 22:08:41 +00:00
Mike Aizatsky