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
4820cc988f
[libFuzzer] remove dfsan support and some related stale code. This is not being used and as is is pretty weak anyway
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llvm-svn: 283187
2016-10-04 06:08:46 +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
90f8f36bca
[libFuzzer] remove some experimental code
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llvm-svn: 282983
2016-09-30 23:29:27 +00:00
e7e790bad6
[libFuzzer] remove unused option
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llvm-svn: 282971
2016-09-30 22:29:57 +00:00
b3949ef885
[libFuzzer] remove the code for -print_pcs=1 with the old coverage. It still works with the new one (trace-pc-guard)
...
llvm-svn: 282831
2016-09-30 01:24:57 +00:00
2c55613a08
[libFuzzer] more the feature set to InputCorpus; on feature update, change the feature counter of the old best input
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llvm-svn: 282829
2016-09-30 01:19:56 +00:00
a9b0dd0e51
[sanitizer-coverage/libFuzzer] make the guards for trace-pc 32-bit; create one array of guards per function, instead of one guard per BB. reorganize the code so that trace-pc-guard does not create unneeded globals
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llvm-svn: 282735
2016-09-29 17:43:24 +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
0800b81a21
[libFuzzer] simplify HandleTrace again, start re-running interesting units and collecting their features.
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llvm-svn: 282316
2016-09-23 23:51:58 +00:00
ce1cab169f
[libFuzzer] be more precise about what we reset in TracePC
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llvm-svn: 282225
2016-09-23 02:18:59 +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
87a598e19f
[libFuzzer] simplify the TracePC logic
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llvm-svn: 282222
2016-09-23 01:20:07 +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
d28099de5d
[libFuzzer] change ValueBitMap to remember the number of bits in it
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llvm-svn: 282216
2016-09-23 00:22:46 +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
20801e1b8a
[libFuzzer] more refactoring; don't compute sha1sum every time we mutate a unit from the corpus, use the stored one.
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llvm-svn: 282115
2016-09-21 21:41:48 +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
...
llvm-svn: 281866
2016-09-18 21:47:08 +00:00
3e36ec1d18
[libFuzzer] change trace-pc to use 8-byte guards
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llvm-svn: 281810
2016-09-17 05:04:47 +00:00
5350178487
[libFuzzer] implement print_pcs with trace-pc-guard. Change the trace-pc-guard heuristic for 8-bit counters to look more like in AFL (not that it's provable better, but the existin test preferes this heuristic)
...
llvm-svn: 281577
2016-09-15 04:36:45 +00:00
a5277d59d0
[libFuzzer] add 8-bit counters to trace-pc-guard handler
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llvm-svn: 281568
2016-09-15 01:30:18 +00:00
a00b243c75
[libFuzzer] start using trace-pc-guard as an alternative source of coverage
...
llvm-svn: 281435
2016-09-14 02:13:06 +00:00
8c537c556a
[libFuzzer] print a failed-merge warning only in the merge mode
...
llvm-svn: 281130
2016-09-10 02:17:22 +00:00
b991cc1f0e
[libFuzzer] print a visible message if merge fails due to a crash
...
llvm-svn: 281122
2016-09-10 00:15:41 +00:00
b76a2a5503
[libFuzzer] improve -print_pcs to not print new PCs coming from libFuzzer itself
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llvm-svn: 281016
2016-09-09 02:38:28 +00:00
8ea4f9873b
[libFuzzer] remove unneeded call
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llvm-svn: 281014
2016-09-09 01:57:38 +00:00
b077d3fef2
[libfuzzer] simplified unit truncation; do not write trunc items to disc
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Differential Revision: https://reviews.llvm.org/D24049
llvm-svn: 280153
2016-08-30 20:49:07 +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
f67357c671
[libFuzzer] simplify the code, NFC
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llvm-svn: 279697
2016-08-25 01:25:03 +00:00
a9a548049a
[libFuzzer] when printing the reproducer input, also print the base input and the mutation sequence
...
llvm-svn: 278975
2016-08-17 20:45:23 +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
c98ef718ea
[libFuzzer] refactoring around PCMap, NFC
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llvm-svn: 278825
2016-08-16 17:37:13 +00:00
728447bd3b
[libFuzzer] make libFuzzer work with a bit older clang versions
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llvm-svn: 277941
2016-08-06 21:28:56 +00:00
ff1f2107ec
[libFuzzer] don't print bogus error message
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llvm-svn: 277940
2016-08-06 21:23:29 +00:00
b4bbc3bb7a
[sanitizers] trace buffer API to use user-allocated buffer.
...
Differential Revision: https://reviews.llvm.org/D23185
llvm-svn: 277859
2016-08-05 20:09:53 +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
fd6ad5bba9
[libFuzzer] use the new chainable malloc hooks instead of the old un-chainable ones, use atomic for malloc/free counters instead of a thread local counter in the main thread. This should make on-the-spot leak detection in libFuzzer more reliable
...
llvm-svn: 272948
2016-06-16 20:17:41 +00:00
53b7b3ca5f
[libFuzzer] add 'weak' back to __sanitizer_malloc_hook and __sanitizer_free_hook
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llvm-svn: 272116
2016-06-08 04:49:29 +00:00
76f425211e
[libFuzzer] add a test that is built w/o coverage instrumentation but has the coverage rt (it should now fail with a descriptive message)
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llvm-svn: 272090
2016-06-08 01:46:13 +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.
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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
70fd3e412a
[libfuzzer] hiding custom mutator handling in MutationDispatcher.
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Summary: Refactoring, no functional changes.
Differential Revision: http://reviews.llvm.org/D20975
llvm-svn: 271740
2016-06-03 21:34:29 +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
f6414426f2
[libFuzzer] use __sanitizer_print_memory_profile to print the memory profile on OOM
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llvm-svn: 271465
2016-06-02 01:33:11 +00:00
4795210f9c
[libFuzzer] fix a use-after-free (!) in libFuzzer caused by r270905: that CL caused a push_back in the main corpus invalidating the vector<> iterators in rare cases.
...
llvm-svn: 271186
2016-05-29 15:58:57 +00:00
311cc8378e
[libFuzzer] fix a failure that occurs when running individual inputs
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llvm-svn: 271095
2016-05-28 04:19:46 +00:00
Kostya Serebryany