09aa01a6f8
[libFuzzer] refactoring: move the Corpus into a separate class; delete two unused experimental features
...
llvm-svn: 282042
2016-09-21 01:04:43 +00:00
b706b481ba
[libFuzzer] add -print_coverage=1 flag to print coverage directly from libFuzzer
...
llvm-svn: 281866
2016-09-18 21:47:08 +00:00
4529960a3b
[libFuzzer] don't print help for internal flags
...
llvm-svn: 281124
2016-09-10 00:35:30 +00:00
5c04bd250e
[libFuzzer] remove use_traces=1 since use_value_profile seems to be strictly better
...
llvm-svn: 281007
2016-09-09 01:17:03 +00:00
e2d0f63654
[libFuzzer] add -minimize_crash flag (to minimize crashers). also add two tests that I failed to commit last time
...
llvm-svn: 280332
2016-09-01 01:22:27 +00:00
a016a45d60
[libFuzzer] fix a bug when running a single unit of N bytes with -max_len=M, M<N, caused a buffer overflow
...
llvm-svn: 280098
2016-08-30 14:52:05 +00:00
0f0fa4faf2
[libFizzer] rename -print_new_cov_pcs=1 into -print_pcs=1 and make it more useful: print PCs only after the initial corpus has been read and symbolize them
...
llvm-svn: 279787
2016-08-25 22:35:08 +00:00
d46a59fac4
[libFuzzer] new experimental feature: value profiling. Profiles values that affect control flow and treats new values as new coverage.
...
llvm-svn: 278839
2016-08-16 19:33:51 +00:00
bdb220c7a0
[libFuzzer] print a verbose message after executing inputs in non-fuzzing mode
...
llvm-svn: 278724
2016-08-15 19:44:04 +00:00
c135b55ae0
[libFuzzer] add hooks for strstr, strcasestr, strcasecmp, strncasecmp
...
llvm-svn: 275648
2016-07-15 23:27:19 +00:00
f0b3e85f4e
[libfuzzer] moving is_ascii handler inside mutation dispatcher.
...
Summary: It also fixes a bug, when first random might not be ascii.
Differential Revision: http://reviews.llvm.org/D21573
llvm-svn: 273611
2016-06-23 20:44:48 +00:00
042d1a7b04
[libFuzzer] make the single-run output more reliable
...
llvm-svn: 272998
2016-06-17 13:07:06 +00:00
1873a496e2
[LibFuzzer] Declare and use sanitizer functions in ``fuzzer::ExternalFunctions``
...
This fixes linking problems on OSX.
Unfortunately it turns out we need to use an instance of the
``fuzzer::ExternalFunctions`` object in several places so this
commit also replaces all instances with a single global instance.
It also turns out initializing a global ``fuzzer::ExternalFunctions``
before main is entered (i.e. letting the object be initialised by the
global initializers) is not safe (on OSX the call to ``Printf()`` in the
CTOR crashes if it is called from a global initializer) so we instead
have a global ``fuzzer::ExternalFunctions*`` and initialize it inside
``FuzzerDriver()``.
Multiple unit tests depend also depend on the
``fuzzer::ExternalFunctions*`` global so a ``main()`` function has been
added that initializes it before running any tests.
Differential Revision: http://reviews.llvm.org/D20943
llvm-svn: 272072
2016-06-07 23:32:50 +00:00
1f88b12272
[libfuzzer] prune_corpus option for disabling pruning during the load.
...
Summary:
The option is very useful for testing, plus I intend to measure
its effect on fuzzer effectiveness.
Differential Revision: http://reviews.llvm.org/D21084
llvm-svn: 272035
2016-06-07 18:16:32 +00:00
d3c33116fd
[LibFuzzer] Reimplement how the optional user functions are called.
...
The motivation for this change is to fix linking issues on OSX.
However this only partially fixes linking issues (the uninstrumented
tests and a few others won't succesfully link yet).
This change introduces a struct of function pointers
(``fuzzer::ExternalFuntions``) which when initialised will point to the
optional functions if they are available. Currently these
``LLVMFuzzerInitialize`` and ``LLVMFuzzerCustomMutator`` functions.
Two implementations of ``fuzzer::ExternalFunctions`` constructor are
provided one for Linux and one for OSX.
The OSX implementation uses ``dlsym()`` because the prior implementation
using weak symbols does not work unless the additional flags are passed
to the linker.
The Linux implementation continues to use weak symbols because the
``dlsym()`` approach does not work unless additional flags are passed
to the linker.
Differential Revision: http://reviews.llvm.org/D20741
llvm-svn: 271491
2016-06-02 05:48:02 +00:00
f817731a19
[libFuzzer] when an invalid flag is given, warn, but don't crash
...
llvm-svn: 271404
2016-06-01 16:41:12 +00:00
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
6289536922
[libFuzzer] print the file name before executing the input so that if there is a crash we know which files has caused it
...
llvm-svn: 269450
2016-05-13 18:10:33 +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
baf7fd0b16
[libFuzzer] print stats after running individual inputs
...
llvm-svn: 268547
2016-05-04 20:44:50 +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
09087bba4d
[libFuzzer] warn if the corpus is empty
...
llvm-svn: 266670
2016-04-18 21:14:11 +00:00
b550cb1750
[NFC] Header cleanup
...
Removed some unused headers, replaced some headers with forward class declarations.
Found using simple scripts like this one:
clear && ack --cpp -l '#include "llvm/ADT/IndexedMap.h"' | xargs grep -L 'IndexedMap[<]' | xargs grep -n --color=auto 'IndexedMap'
Patch by Eugene Kosov <claprix@yandex.ru>
Differential Revision: http://reviews.llvm.org/D19219
From: Mehdi Amini <mehdi.amini@apple.com>
llvm-svn: 266595
2016-04-18 09:17:29 +00:00
b60397f54c
[libFuzzer] add a better warning for command line flags with -- (two dashes)
...
llvm-svn: 266480
2016-04-15 21:56:29 +00:00
e631996350
Remove redundant .c_str(), as suggested by PR25633
...
llvm-svn: 265988
2016-04-11 20:35:17 +00:00
f389ae12c1
[libFuzzer] handle SIGTERM
...
llvm-svn: 264338
2016-03-24 21:03:58 +00:00
49e409068a
[libFuzzer] add a flag close_fd_mask so that we can silence spammy targets by closing stderr/stdout
...
llvm-svn: 263831
2016-03-18 20:58:29 +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
0c5e3af862
[libFuzzer] use max_len exactly equal to the max size of input. Fix 32-bit build
...
llvm-svn: 263518
2016-03-15 01:28:00 +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
5c3701c621
[libFuzzer] log less when re-loading files; fix a silly bug: when running single files actually run all of them, not just the first one
...
llvm-svn: 262754
2016-03-04 22:35:40 +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
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
8a5bef0fcf
[libFuzzer] remove std::vector operations from hot paths, NFC
...
llvm-svn: 260829
2016-02-13 17:56:51 +00:00
29bcb9f54e
[libFuzzer] remove the C++-ish variant of FuzzerDriver from the interface
...
llvm-svn: 260801
2016-02-13 03:59:26 +00:00
7ec0c56e07
[libFuzzer] get rid of UserSuppliedFuzzer; NFC
...
llvm-svn: 260798
2016-02-13 03:25:16 +00:00
a399221c32
[libFuzzer] simplify the code around Random. NFC
...
llvm-svn: 260797
2016-02-13 03:00:53 +00:00
ecab57b3ce
[libFuzzer] remove UserSuppliedFuzzer from the interface (it was a bad idea).
...
llvm-svn: 260796
2016-02-13 02:39:30 +00:00
9d14e4bb15
[libFuzzer] make -runs=N flag also affect the simple runner (will execute every input N times)
...
llvm-svn: 260649
2016-02-12 02:32:03 +00:00
bfbe7fc404
[libFuzzer] allow passing 1 or more files as individual inputs
...
llvm-svn: 259459
2016-02-02 03:03:47 +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
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
...
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
ae5b9567bc
[libFuzzer] do mutations based on memcmp/strcmp interceptors under a separate flag (-use_memcmp, default=1)
...
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.
...
llvm-svn: 257848
2016-01-15 00:17:37 +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
152ac7ad70
[libFuzzer] add a position hint to the dictionary-based mutator
...
llvm-svn: 257013
2016-01-07 01:49:35 +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
550e9c80a6
[libFuzzer] deprecate -save_minimized_corpus, -merge can be used instead
...
llvm-svn: 256086
2015-12-19 03:42:16 +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
2d0ef14f5d
[libFuzzer] add a flag -exact_artifact_path
...
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
...
llvm-svn: 253761
2015-11-21 03:46:43 +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
856b7afe60
[libFuzzer] make -test_single_input more reliable: make sure the input's size is equal to it's capacity
...
llvm-svn: 251961
2015-11-03 18:57:25 +00:00
9cc3b0ddb6
[libFuzzer] add -merge flag to merge corpora
...
llvm-svn: 251168
2015-10-24 01:16:40 +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
b36025619c
[libFuzzer] remove the deprecated 'tokens' feature
...
llvm-svn: 251069
2015-10-22 21:48:09 +00:00
2626094fa1
Make a bunch of static arrays const.
...
llvm-svn: 250642
2015-10-18 05:15:34 +00:00
fed509e73d
[libFuzzer] add -shuffle flag
...
llvm-svn: 250603
2015-10-17 04:38:26 +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
bd5d1cdbb9
[libFuzzer] add -artifact_prefix flag
...
llvm-svn: 249807
2015-10-09 03:57:59 +00:00
c8cd29fb7e
[libFuzzer] trying to fix at-exit hang
...
llvm-svn: 249231
2015-10-03 07:02:05 +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
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
a938bcb89a
[libFuzzer] add two more variants of FuzzerDriver for convenience
...
llvm-svn: 247300
2015-09-10 16:57:57 +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
9838b2be87
[libFuzzer] adding a parser for AFL-style dictionaries + tests.
...
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
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
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
404c69f2c8
[libFuzzer] allow users to supply their own implementation of rand
...
llvm-svn: 243078
2015-07-24 01:06:40 +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
...
llvm-svn: 237735
2015-05-19 22:12:57 +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
9690fcf12e
[lib/Fuzzer] guess the right number of workers if -jobs=N is given but -workers=M is not. Update the docs.
...
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)
...
llvm-svn: 237083
2015-05-12 01:58:34 +00:00
cd7629caec
[lib/Fuzzer] detach the pulse thread instad of joining it
...
llvm-svn: 237082
2015-05-12 01:43:20 +00:00
83fd486ff4
[lib/Fuzzer] when running multiple fuzzing processes, print something every 10 minutes to avoid buildbot timeouts
...
llvm-svn: 237054
2015-05-11 21:31:51 +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.
...
llvm-svn: 237043
2015-05-11 20:51:19 +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
...
llvm-svn: 236906
2015-05-08 21:30:55 +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
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
Kostya Serebryany