bb59ef77ca
[libFuzzer] detect leaks after every run when executing fixed inputs (./fuzzer -runs=1000000 my-file)
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llvm-svn: 284514
2016-10-18 18:38:08 +00:00
f9b8e8b117
[libFuzzer] better algorithm for -minimize_crash
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llvm-svn: 284299
2016-10-15 01:00:24 +00:00
a5f94fb6c9
[libFuzzer] add -trace_cmp=1 (guiding mutations based on the observed CMP instructions). This is a reincarnation of the previously deleted -use_traces, but using a different approach for collecting traces. Still a toy, but at least it scales well. Also fix -merge in trace-pc-guard mode
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llvm-svn: 284273
2016-10-14 20:20:33 +00:00
a17d23eaa7
[libFuzzer] add -trace_malloc= flag
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llvm-svn: 284149
2016-10-13 19:06:46 +00:00
c5325ed29d
[libFuzzer] when shrinking the corpus, delete evicted files previously created by the current process
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llvm-svn: 283682
2016-10-08 23:24:45 +00:00
9adc7c8b4a
[libFuzzer] control the reload interval by a flag, make it 10 seconds by default
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llvm-svn: 283676
2016-10-08 22:12:14 +00:00
936b1e774f
[libFuzzer] be more careful with memory usage, print peak rss in status lines
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llvm-svn: 283418
2016-10-06 05:14:00 +00:00
1c73f1bf27
[libFuzzer] refactoring to make -shrink=1 work for value profile, added a test.
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llvm-svn: 283409
2016-10-05 22:56:21 +00:00
2455f0d013
[libFuzzer] clear the corpus elements if they are evicted (i.e. smaller elements with proper coverage are found). Make sure we never try to mutate empty element. Print the corpus size in bytes in the status lines
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llvm-svn: 283279
2016-10-05 00:25:17 +00:00
d216922a80
[libFuzzer] implement the -shrink=1 option that tires to make elements of the corpus smaller, off by default
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llvm-svn: 282995
2016-10-01 01:04:29 +00:00
e7e790bad6
[libFuzzer] remove unused option
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llvm-svn: 282971
2016-09-30 22:29:57 +00:00
5ff481fd9e
[libFuzzer] add -exit_on_src_pos to test libFuzzer itself, add a test script for RE2 that uses this flag
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llvm-svn: 282458
2016-09-27 00:10:20 +00:00
16a145fd0f
[libFuzzer] fix merging with trace-pc-guard
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llvm-svn: 282224
2016-09-23 01:58:51 +00:00
ab73c6924f
[libFuzzer] move value profiling logic into TracePC
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llvm-svn: 282219
2016-09-23 00:46:18 +00:00
be0ed59cdc
[libFuzzer] simplify the crash minimizer; split MaxLen into two: MaxInputLen and MaxMutationLen, allow MaxMutationLen to be less than MaxInputLen
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llvm-svn: 282211
2016-09-22 23:16:36 +00:00
624f59f4d8
[libFuzzer] add 'features' to the corpus elements, allow mutations with Size > MaxSize, fix sha1 in corpus stats; various refactorings
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llvm-svn: 282129
2016-09-22 01:34:58 +00:00
29bb664075
[libFuzzer] add stats to the corpus; more refactoring
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llvm-svn: 282121
2016-09-21 22:42:17 +00:00
6f5a804cdb
[libFuzzer] refactoring: split the large header into many; NFC
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llvm-svn: 282044
2016-09-21 01:50:50 +00:00
09aa01a6f8
[libFuzzer] refactoring: move the Corpus into a separate class; delete two unused experimental features
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llvm-svn: 282042
2016-09-21 01:04:43 +00:00
b706b481ba
[libFuzzer] add -print_coverage=1 flag to print coverage directly from libFuzzer
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llvm-svn: 281866
2016-09-18 21:47:08 +00:00
4529960a3b
[libFuzzer] don't print help for internal flags
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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
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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
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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
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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
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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.
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llvm-svn: 278839
2016-08-16 19:33:51 +00:00
bdb220c7a0
[libFuzzer] print a verbose message after executing inputs in non-fuzzing mode
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llvm-svn: 278724
2016-08-15 19:44:04 +00:00
c135b55ae0
[libFuzzer] add hooks for strstr, strcasestr, strcasecmp, strncasecmp
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llvm-svn: 275648
2016-07-15 23:27:19 +00:00
f0b3e85f4e
[libfuzzer] moving is_ascii handler inside mutation dispatcher.
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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
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llvm-svn: 272998
2016-06-17 13:07:06 +00:00
1873a496e2
[LibFuzzer] Declare and use sanitizer functions in ``fuzzer::ExternalFunctions``
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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.
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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.
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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
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llvm-svn: 271404
2016-06-01 16:41:12 +00:00
af432a45e3
[libfuzzer] Trying random unit prefixes during corpus load.
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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
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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.
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llvm-svn: 268821
2016-05-06 23:38:07 +00:00
52b394e981
[libFuzzer] add exeprimental -rss_limit_mb flag to fight against OOMs
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llvm-svn: 268807
2016-05-06 21:58:35 +00:00
baf7fd0b16
[libFuzzer] print stats after running individual inputs
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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
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llvm-svn: 266838
2016-04-20 00:24:21 +00:00
09087bba4d
[libFuzzer] warn if the corpus is empty
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llvm-svn: 266670
2016-04-18 21:14:11 +00:00
b550cb1750
[NFC] Header cleanup
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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)
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llvm-svn: 266480
2016-04-15 21:56:29 +00:00
e631996350
Remove redundant .c_str(), as suggested by PR25633
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llvm-svn: 265988
2016-04-11 20:35:17 +00:00
f389ae12c1
[libFuzzer] handle SIGTERM
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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
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llvm-svn: 263831
2016-03-18 20:58:29 +00:00
945761b8c2
[libFuzzer] improve -merge functionality
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llvm-svn: 263769
2016-03-18 00:23:29 +00:00
c5575aabd6
[libFuzzer] deprecate several flags
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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
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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.
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llvm-svn: 263323
2016-03-12 01:57:04 +00:00
Kostya Serebryany