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
b5e984992a
[libFuzzer] don't do expensive memmem if the result will not be used
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llvm-svn: 258462
2016-01-22 01:04:58 +00:00
2f13f223c7
[libFuzzer] don't use std::vector in one more hot path
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llvm-svn: 258380
2016-01-21 01:52:14 +00:00
e313f8f8ff
[libfuzzer] use %p for printing addresses
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llvm-svn: 258370
2016-01-21 00:02:09 +00:00
311f27c0a8
[libFuzzer] use std::mt19937 for generating random numbers by default. Fix MyStoll to handle negative values. Use std::any_of instead of std::find_if
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llvm-svn: 258178
2016-01-19 20:33:57 +00:00
476f0ce31a
[libFuzzer] replace vector with a simpler data structure in the Dictionaries to avoid memory allocations on hot path
...
llvm-svn: 257985
2016-01-16 03:53:32 +00:00
aca7696f4d
[libFuzzer] introduce LLVMFuzzerInitialize
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llvm-svn: 257980
2016-01-16 01:23:12 +00:00
628bc3ec00
[libFuzzer] move some code from public interface header to a non-public header. NFC
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llvm-svn: 257963
2016-01-16 00:04:36 +00:00
ae5b9567bc
[libFuzzer] do mutations based on memcmp/strcmp interceptors under a separate flag (-use_memcmp, default=1)
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llvm-svn: 257873
2016-01-15 06:24:05 +00:00
4282d30516
[libFuzzer] use custom stol; also introduce __libfuzzer_is_present so that users can check for its presence.
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llvm-svn: 257848
2016-01-15 00:17:37 +00:00
4b35874b2a
[libFuzzer] suggest a dictionary to the user of some of the trace-based dictionary entries were successful
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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
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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)
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llvm-svn: 257701
2016-01-13 23:02:30 +00:00
72fdb32dac
[libFuzzer] make sure to update CurrentUnit when drilling
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llvm-svn: 257560
2016-01-13 01:58:27 +00:00
4b83a4f6fe
[libFuzzer] add a macro LLVM_FUZZER_DEFINES_SANITIZER_WEAK_HOOOKS
...
llvm-svn: 257482
2016-01-12 16:50:18 +00:00
4174005622
[libFuzzer] when a new unit is discovered using a dictionary, print all used dictionary entries
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llvm-svn: 257435
2016-01-12 02:36:59 +00:00
859e86d962
[libFuzzer] add various debug prints. Also don't mutate based on a cmp trace like (a eq a) or (a neq a)
...
llvm-svn: 257434
2016-01-12 02:08:37 +00:00
e3580956ea
[libFuzzer] extend the weak memcmp/strcmp/strncmp interceptors to receive the result of the computations. With that, don't do any mutations if memcmp/etc returned 0
...
llvm-svn: 257423
2016-01-12 00:43:42 +00:00
1f9c40db1d
[libFuzzer] debug prints in tracing
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llvm-svn: 257249
2016-01-09 03:46:08 +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
c573316eee
[libFuzzer] don't limit memcmp tracing with 8 bytes
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llvm-svn: 257245
2016-01-09 01:39:55 +00:00
e7583d21e3
[libFuzzer] refactor the way we collect cmp traces (don't use std::vector, don't limit with 8 bytes)
...
llvm-svn: 257239
2016-01-09 00:38:40 +00:00
152ac7ad70
[libFuzzer] add a position hint to the dictionary-based mutator
...
llvm-svn: 257013
2016-01-07 01:49:35 +00:00
80eb76abf4
[libFuzzer] extend the dictionary mutator to optionally overwrite data with the dict entry
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llvm-svn: 256900
2016-01-06 02:13:04 +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
226b734d73
[libFuzzer] make trace-based fuzzing not crash in presence of threads
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llvm-svn: 256876
2016-01-06 00:03:35 +00:00
b0fb6e8508
[libFuzzer] add AFL-style dictionary for C++, remove the old file with tokens
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llvm-svn: 256229
2015-12-22 01:50:51 +00:00
550e9c80a6
[libFuzzer] deprecate -save_minimized_corpus, -merge can be used instead
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llvm-svn: 256086
2015-12-19 03:42:16 +00:00
bf65644c97
[libFuzzer] split the tests to run them in parallel, remove one redundant test
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llvm-svn: 256085
2015-12-19 03:35:30 +00:00
27ab2d759f
[libFuzzer] make CrossOver just one of the other mutations
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llvm-svn: 256081
2015-12-19 02:49:09 +00:00
14c50288cc
[libFuzzer] print successfull mutations sequences
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llvm-svn: 256071
2015-12-19 01:09:49 +00:00
16c1978760
Fuzzer: Fix library dependencies.
...
Newer versions of libstdc++ (4.9+), as well as libc++, depend directly on
libpthread from the standard library headers, so libfuzzer needs to declare
a standard library dependency.
llvm-svn: 255745
2015-12-16 02:14:57 +00:00
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
8617aaaac2
[libFuzzer] don't reload the corpus more than once every second
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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
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llvm-svn: 254784
2015-12-04 22:29:39 +00:00
71552ce64b
Libfuzzer: do not pass null into user function
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Differential Revision: http://reviews.llvm.org/D15098
llvm-svn: 254558
2015-12-02 22:43:53 +00:00
fba04273b7
[libFuzzer] add a test that is built with -fsanitize-coverage=trace-bb
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llvm-svn: 254484
2015-12-02 02:49:37 +00:00
2d0ef14f5d
[libFuzzer] add a flag -exact_artifact_path
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llvm-svn: 254100
2015-11-25 21:40:46 +00:00
b569368a5a
[libFuzzer] don't crash when reporting a leak in test_single_input mode
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llvm-svn: 253761
2015-11-21 03:46:43 +00:00
4d62322213
[libFuzzer] remove default initializer as a workaround for https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68399 . Don't need it anyway.
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llvm-svn: 253419
2015-11-18 01:08:30 +00:00
2a48c24d77
[libFuzzer] make libFuzzer build even with a compiler that does not have sanitizer headers
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llvm-svn: 253003
2015-11-13 01:54:40 +00:00
a9c2387192
output_csv libfuzzer option
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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)
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llvm-svn: 252838
2015-11-12 01:02:01 +00:00
b7e286bed7
[libFuzzer] add UninstrumentedTest.cpp (missing from a previous commit)
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llvm-svn: 252658
2015-11-10 22:02:56 +00:00
5eab74e9bc
[libFuzzer] make libFuzzer link if there is no sanitizer coverage instrumentation (it will fail at start-up time)
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llvm-svn: 252533
2015-11-09 23:17:45 +00:00
b8d0da1386
[libFuzzer] print a bit fewer lines
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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)
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llvm-svn: 252097
2015-11-04 23:22:25 +00:00
856b7afe60
[libFuzzer] make -test_single_input more reliable: make sure the input's size is equal to it's capacity
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llvm-svn: 251961
2015-11-03 18:57:25 +00:00
9cc3b0ddb6
[libFuzzer] add -merge flag to merge corpora
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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
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llvm-svn: 251133
2015-10-23 18:37:58 +00:00
2e9fca9f88
[libFuzzer] use the indirect caller-callee counter as an independent search heuristic
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llvm-svn: 251078
2015-10-22 23:55:39 +00:00
09d2a5f6e1
[libFuzzer] more refactoring the code that checks the coverage. NFC
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llvm-svn: 251075
2015-10-22 22:56:45 +00:00
007c9b25f4
[libFuzzer] refactoring the code that checks the coverage. NFC
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llvm-svn: 251074
2015-10-22 22:50:47 +00:00
b36025619c
[libFuzzer] remove the deprecated 'tokens' feature
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llvm-svn: 251069
2015-10-22 21:48:09 +00:00
2626094fa1
Make a bunch of static arrays const.
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llvm-svn: 250642
2015-10-18 05:15:34 +00:00
fed509e73d
[libFuzzer] add -shuffle flag
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llvm-svn: 250603
2015-10-17 04:38:26 +00:00
d6edce97fb
[libFuzzer] print a stack trace on timeout
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llvm-svn: 250571
2015-10-16 23:04:31 +00:00
a9da9b48ef
[libFuzzer] reduce the size of artifacts printed on the screen
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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
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llvm-svn: 249808
2015-10-09 04:03:14 +00:00
bd5d1cdbb9
[libFuzzer] add -artifact_prefix flag
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llvm-svn: 249807
2015-10-09 03:57:59 +00:00
3b804877fd
[libFuzzer] fix 32-bit build
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llvm-svn: 249646
2015-10-08 00:59:25 +00:00
c8cd29fb7e
[libFuzzer] trying to fix at-exit hang
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llvm-svn: 249231
2015-10-03 07:02:05 +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.
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llvm-svn: 249214
2015-10-02 23:34:06 +00:00
65d0a1458f
[libFuzzer] remove experimental flag and functionality
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llvm-svn: 249194
2015-10-02 22:00:32 +00:00
b85db178a0
[libFuzzer] add a flag -max_total_time
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llvm-svn: 249181
2015-10-02 20:47:55 +00:00
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
3287d7a6ed
[libFuzzer] Marking exported symbols as visible. Patch by Mike Aizatsky
...
llvm-svn: 248954
2015-09-30 22:22:37 +00:00
dd02f1f8ab
[libFuzzer] perform fewer crossover operations compared to plain mutations
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llvm-svn: 247364
2015-09-11 00:20:58 +00:00
65f50868e5
[libFuzzer] refactor the code to allow building libFuzzer on platforms that don't have dfsan and don't support weak functions
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llvm-svn: 247321
2015-09-10 18:48:38 +00:00
a938bcb89a
[libFuzzer] add two more variants of FuzzerDriver for convenience
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llvm-svn: 247300
2015-09-10 16:57:57 +00:00
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
4b82de2e47
[libFuzzer] remove a piece of stale code
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llvm-svn: 247067
2015-09-08 20:40:10 +00:00
9cdea94f66
[libFuzzer] be more robust when dealing with files on disk (e.g. don't crash if a file was there but disappeared)
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llvm-svn: 247066
2015-09-08 20:36:33 +00:00
b06fae5ede
[libFuzzer] better documentatio for -save_minimized_corpus=1
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llvm-svn: 247033
2015-09-08 17:43:51 +00:00
468ed78434
[libFuzzer] remove -iterations as redundant (there is also -num_runs)
...
llvm-svn: 247030
2015-09-08 17:30:35 +00:00
25425ad920
[libFuzzer] add one more mutator: Mutate_ChangeASCIIInteger
...
llvm-svn: 247027
2015-09-08 17:19:31 +00:00
e641dd6479
[libFuzzer] more accurate logic for traces, 80-char fix
...
llvm-svn: 246888
2015-09-04 22:32:25 +00:00
b2e9897644
[libFuzzer] when a single mutation fails try a few more times with other mutations before returning un-mutated data
...
llvm-svn: 246828
2015-09-04 00:40:29 +00:00
7d21166218
[libFuzzer] actually make the dictionaries work (+docs)
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llvm-svn: 246825
2015-09-04 00:12:11 +00:00
ec2dcb1d91
[libFuzzer] refactor the mutation functions so that they are now methods of a class. NFC
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llvm-svn: 246808
2015-09-03 21:24:19 +00:00
9838b2be87
[libFuzzer] adding a parser for AFL-style dictionaries + tests.
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llvm-svn: 246800
2015-09-03 20:23:46 +00:00
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
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
06c199ac9d
[libFuzzer] fix minor inefficiency, PR24584
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llvm-svn: 246087
2015-08-26 21:55:19 +00:00
1230a54970
Fix missing space in libfuzzer's help text.
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llvm-svn: 244800
2015-08-12 20:00:10 +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
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llvm-svn: 244708
2015-08-12 01:04:27 +00:00
ac25eeba76
[libFuzzer] use raw C IO to reduce the risk of a deadlock in a signal handler.
...
llvm-svn: 244707
2015-08-12 00:55:09 +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
347663b214
Add missing include guard to FuzzerInternal.h, NFC.
...
llvm-svn: 244457
2015-08-10 16:37:40 +00:00
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
bf29ff2fa5
[libFuzzer] add one more mutation strategy: byte shuffling
...
llvm-svn: 244188
2015-08-06 01:29:13 +00:00
d46369d8b3
[libFuzzer] avoid build warnings in non-assert build (useful warning in this case)
...
llvm-svn: 244177
2015-08-05 23:44:42 +00:00
4cc10d432a
[libFuzzer] in dfsan mode, set labels every time we start recording traces as opposed to doing it at process startup. This ensures that the labels are fresh.
...
llvm-svn: 244165
2015-08-05 23:02:57 +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
1ce0035bf0
[libFuzzer] add a missing test file
...
llvm-svn: 244151
2015-08-05 21:32:13 +00:00
7f4227d59a
[libFuzzer] use data-flow feedback from strcmp
...
llvm-svn: 244084
2015-08-05 18:23:01 +00:00
86a5fba71d
[libFuzzer] more refactoring of the Mutator and adding tests to it
...
llvm-svn: 243818
2015-08-01 02:23:06 +00:00
8ce7424e9c
[libFuzzer] start refactoring the Mutator and adding tests to it
...
llvm-svn: 243817
2015-08-01 01:42:51 +00:00
1165efdbf9
[libFuzzer] limit the size of the inputs printed to stderr
...
llvm-svn: 243795
2015-07-31 22:07:17 +00:00
fe7e41e8f5
[libFuzzer] make sure that 2-byte arguments of switch() are handled properly
...
llvm-svn: 243781
2015-07-31 20:58:55 +00:00
73932e5fe3
[libFuzzer] record traces from the switch statements only when told to do so
...
llvm-svn: 243768
2015-07-31 18:09:08 +00:00
cd6a4665e0
[libFuzzer] support switch interception in dfsan mode
...
llvm-svn: 243760
2015-07-31 17:05:05 +00:00
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
c9dc96bfc6
[libFuzzer] fix the strncmp interceptor -- it should respect short strings.
...
llvm-svn: 243691
2015-07-30 21:22:22 +00:00
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
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
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
35959592a3
[libFuzzer] when using cmp traces, first check that the CMP is evaluated to one value much more frequently than to the other value (heuristic)
...
llvm-svn: 243363
2015-07-28 00:59:53 +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
4800c2de28
[Fuzzer] Rely on $PATH expansion instead of hardcoding paths in tests. NFC.
...
llvm-svn: 242851
2015-07-21 22:51:55 +00:00
dc324e1644
[Fuzzer] Clearly separate regular and DFSan tests. NFC.
...
llvm-svn: 242850
2015-07-21 22:51:49 +00:00
86e4a3e0a3
[libFuzzer] require the files and directories passed to the fuzzer to exist
...
llvm-svn: 242596
2015-07-18 00:03:37 +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
3fe7682fb0
[lib/Fuzzer] relax an assertion
...
llvm-svn: 238608
2015-05-29 20:31:17 +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
c5f905cceb
[lib/Fuzzer] fix docs
...
llvm-svn: 238236
2015-05-26 19:32:52 +00:00
c8228dd9fb
[lib/Fuzzer] fix build with assertions
...
llvm-svn: 238235
2015-05-26 19:29:33 +00:00
e0d60ba876
[lib/Fuzzer] doxygen-ify the comments for the user interface
...
llvm-svn: 238086
2015-05-23 02:12:05 +00:00
7c180eafc1
[lib/Fuzzer] fully get rid of std::cerr in libFuzzer
...
llvm-svn: 238081
2015-05-23 01:22:35 +00:00
20e9bcbfc8
[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.
...
llvm-svn: 238078
2015-05-23 01:07:46 +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
71e0feb1ac
[lib/Fuzzer] ignore flags that start with --; use git pull --rebase instead of just git pull
...
llvm-svn: 237950
2015-05-21 20:39:13 +00:00
490bbd6fa4
[lib/Fuzzer] change the meaning of -timeout flag: now timeout is applied to every unit of work separately
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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
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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
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llvm-svn: 237617
2015-05-18 21:34:20 +00:00
a8f01bc8e1
Code cleanup: Reindent Fuzzer::MutateAndTestOne.
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llvm-svn: 237533
2015-05-17 02:44:31 +00:00
96eab65d81
[lib/Fuzzer] Add SHA1 implementation from public domain.
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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
llvm-svn: 237400
2015-05-14 22:41:49 +00:00
1ce4ebf7d6
[lib/Fuzzer] enable -use_counters=1 by default
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llvm-svn: 237272
2015-05-13 18:31:46 +00:00
80ec5a11b5
[lib/Fuzzer] A simple script to synchronise a fuzz test corpus with an external git repository.
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llvm-svn: 237208
2015-05-12 23:19:12 +00:00
f47198aa36
[lib/Fuzzer] use sha1sum for the file hash
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llvm-svn: 237198
2015-05-12 22:03:34 +00:00
9690fcf12e
[lib/Fuzzer] guess the right number of workers if -jobs=N is given but -workers=M is not. Update the docs.
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llvm-svn: 237163
2015-05-12 18:51:57 +00:00
d8c54724a8
[lib/Fuzzer] remove the -dfsan=1 flag, just use -use_traces=1 (w/ or w/o dfsan)
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llvm-svn: 237083
2015-05-12 01:58:34 +00:00
cd7629caec
[lib/Fuzzer] detach the pulse thread instad of joining it
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llvm-svn: 237082
2015-05-12 01:43:20 +00:00
8817e86efd
[lib/Fuzzer] don't record traces when trace collection is off
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llvm-svn: 237067
2015-05-11 23:25:28 +00:00
83fd486ff4
[lib/Fuzzer] when running multiple fuzzing processes, print something every 10 minutes to avoid buildbot timeouts
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llvm-svn: 237054
2015-05-11 21:31:51 +00:00
225262562f
[lib/Fuzzer] rename FuzzerDFSan.cpp to FuzzerTraceState.cpp; update comments. NFC expected
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llvm-svn: 237050
2015-05-11 21:16:27 +00:00
5a99ecbbb3
[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.
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llvm-svn: 237043
2015-05-11 20:51:19 +00:00
f3f3ed323a
[lib/Fuzzer] build tests that work well with dfsan also w/o dfsan
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llvm-svn: 236909
2015-05-08 21:45:19 +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
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llvm-svn: 236906
2015-05-08 21:30:55 +00:00
21a3381a38
Update CMake flags, LibFuzzer comments and docs for new -fsanitize-coverage= flags.
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llvm-svn: 236797
2015-05-07 23:33:24 +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.
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llvm-svn: 236772
2015-05-07 21:02:11 +00:00
7d470cfb0c
[lib/Fuzzer] minor refactoring/simplification, NFC
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llvm-svn: 236757
2015-05-07 18:32:29 +00:00
a407ddef27
[lib/Fuzzer] add dfsan_weak_hook_memcmp, enable the test that uses it, simplify the test runner
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llvm-svn: 236683
2015-05-07 00:11:33 +00:00
3befe94acb
[lib/Fuzzer] remove dfsan_fuzzer_abi.list -- its contents are now moved to dfsan proper
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llvm-svn: 236659
2015-05-06 22:47:24 +00:00
754f55d6f5
[lib/Fuzzer] add a fuzzer test for memcmp (does not work yet)
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llvm-svn: 236656
2015-05-06 22:36:00 +00:00
566bc5aa8a
[lib/Fuzzer] rename TestOneInput to LLVMFuzzerTestOneInput to make it more unique
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llvm-svn: 236652
2015-05-06 22:19:00 +00:00
ca6a2a2f1c
[lib/Fuzzer] on crash print the contents of the crashy input as base64
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llvm-svn: 236548
2015-05-05 21:59:51 +00:00
177582c90f
[lib/Fuzzer] use handle_abort=1 by default so that when assert() fires we save the test case
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llvm-svn: 236476
2015-05-05 01:42:55 +00:00
f77031f99d
Removing a spurious space; NFC.
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llvm-svn: 234168
2015-04-06 16:09:13 +00:00
043ab1c8a7
[fuzzer] document the -tokens flag. Also change the diagnostic output
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llvm-svn: 233842
2015-04-01 21:33:20 +00:00
52a788e503
[fuzzer] Add support for token-based fuzzing (e.g. for C++). Allow string flags.
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llvm-svn: 233745
2015-03-31 20:13:20 +00:00
35ce8630f3
Move lib/Fuzzer docs from a README.txt to a proper .rst file.
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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
llvm-svn: 233638
2015-03-30 23:05:30 +00:00
16901a901d
[fuzzer] when a single unit takes over 1 second to run and it is the slowest one so far, print it.
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llvm-svn: 233637
2015-03-30 23:04:35 +00:00
03db8b9225
[fuzzer] print various stats in a unified way
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llvm-svn: 233624
2015-03-30 22:44:03 +00:00
16d03bd051
DFSan-based fuzzer (proof of concept).
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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).
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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
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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
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llvm-svn: 229882
2015-02-19 18:45:37 +00:00
2117269dd1
[fuzzer] properly annotate fallthrough, add one more entry to FAQ
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llvm-svn: 229880
2015-02-19 18:21:12 +00:00
db4d645714
[fuzzer] move default sanitizer options to a separate file
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llvm-svn: 228429
2015-02-06 19:52:07 +00:00
92e0476c67
[fuzzer] add flag prefer_small_during_initial_shuffle, be a bit more verbose
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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.
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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
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llvm-svn: 228170
2015-02-04 19:10:20 +00:00
fe43aa8d19
[fuzzer]: fix exit code, add more diagnostics
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llvm-svn: 228103
2015-02-04 01:22:57 +00:00
cf9fdd5876
[fuzzer] Add proper dependensices to the fuzzer tests
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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
llvm-svn: 228045
2015-02-03 21:57:32 +00:00
4b96ce96c6
[fuzzer] update the include line to use the new header name
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llvm-svn: 228018
2015-02-03 19:42:05 +00:00
e8cee11570
[fuzzer] add flags to run fuzzer in multiple parallel processes
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llvm-svn: 227664
2015-01-31 01:14:40 +00:00
71672552db
[fuzzer] Add a gtest-style test
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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
llvm-svn: 227639
2015-01-30 23:26:57 +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.
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llvm-svn: 227507
2015-01-29 23:01:07 +00:00
0ff86c79b4
[fuzzer] fix warning in a test
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llvm-svn: 227478
2015-01-29 18:13:36 +00:00
6d768fcc18
[fuzzer] minor cleanup based on reviews: remove redundant includes, fix a copy-pasto in tests
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llvm-svn: 227468
2015-01-29 17:16:23 +00:00
a1849af4a9
[fuzzer] add FAQ section to the README.txt
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llvm-svn: 227466
2015-01-29 17:11:30 +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.
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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
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llvm-svn: 227452
2015-01-29 15:49:22 +00:00
d39df1e24d
Adding missing #includes to try to get this to compile on Windows with Visual Studio.
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llvm-svn: 227445
2015-01-29 15:19:13 +00:00
265cf04f9c
[fuzzer] add option -save_minimized_corpus
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llvm-svn: 227395
2015-01-28 23:48:39 +00:00
a8fbcf0c1f
Add lit-style tests for the Fuzzer library
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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
e6972a029f
[fuzzer] instructions for building/running clang-format-fuzzer
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llvm-svn: 227357
2015-01-28 19:51:58 +00:00
bfa3f9d82f
[fuzzer] properly enable asan's coverage feedback
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llvm-svn: 227254
2015-01-27 22:19:55 +00:00
d53b43fe11
Add a Fuzzer library
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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
Ivan Krasin