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31 Commits

Author SHA1 Message Date
Kostya Serebryany
279707ab7f [libFuzzer] use table of recent compares for memcmp/strcmp (to unify the code between cmp and memcmp handling) 
llvm-svn: 292287
 2017-01-17 23:09:05 +00:00
Mike Aizatsky
fa48306d58 [libfuzzer] custom crossover interface function. 
Differential Revision: http://reviews.llvm.org/D21089

llvm-svn: 272054
 2016-06-07 20:22:15 +00:00
Kostya Serebryany
50c6e0a004 [libFuzzer] simplify FuzzerInterface.h 
llvm-svn: 269448
 2016-05-13 18:04:35 +00:00
Kostya Serebryany
bf966c5f23 [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
Kostya Serebryany
ef83d4c558 [libFuzzer] remove the C++-ish variant of FuzzerDriver from the interface 
llvm-svn: 260801
 2016-02-13 03:59:26 +00:00
Kostya Serebryany
1bb500faf8 [libFuzzer] remove UserSuppliedFuzzer from the interface (it was a bad idea). 
llvm-svn: 260796
 2016-02-13 02:39:30 +00:00
Kostya Serebryany
b2451a8b09 [libFuzzer] provide a plain C interface for custom mutators (experimental) 
llvm-svn: 260794
 2016-02-13 02:29:38 +00:00
Ivan Krasin
7b4522dc59 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
Ivan Krasin
db4009626d 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
Kostya Serebryany
8820217862 [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
Kostya Serebryany
d65aa3494d [libFuzzer] introduce LLVMFuzzerInitialize 
llvm-svn: 257980
 2016-01-16 01:23:12 +00:00
Kostya Serebryany
87079ee20d [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
Kostya Serebryany
f77ffed10e [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
Kostya Serebryany
bdc66ac566 [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
Kostya Serebryany
da719cf533 [libFuzzer] add a position hint to the dictionary-based mutator 
llvm-svn: 257013
 2016-01-07 01:49:35 +00:00
Kostya Serebryany
ab36ca708c [libFuzzer] make CrossOver just one of the other mutations 
llvm-svn: 256081
 2015-12-19 02:49:09 +00:00
Kostya Serebryany
e4adf51693 [libFuzzer] print successfull mutations sequences 
llvm-svn: 256071
 2015-12-19 01:09:49 +00:00
Mike Aizatsky
ea27e92765 [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
Kostya Serebryany
f03686178a [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
Kostya Serebryany
4487114c63 [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
Kostya Serebryany
0001c18d8c [libFuzzer] add two more variants of FuzzerDriver for convenience 
llvm-svn: 247300
 2015-09-10 16:57:57 +00:00
Kostya Serebryany
a575372f59 [libFuzzer] add one more mutator: Mutate_ChangeASCIIInteger 
llvm-svn: 247027
 2015-09-08 17:19:31 +00:00
Kostya Serebryany
28a699d9b8 [libFuzzer] actually make the dictionaries work (+docs) 
llvm-svn: 246825
 2015-09-04 00:12:11 +00:00
Kostya Serebryany
3eaa9123bf [libFuzzer] refactor the mutation functions so that they are now methods of a class. NFC 
llvm-svn: 246808
 2015-09-03 21:24:19 +00:00
Kostya Serebryany
90b784ccc2 [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
Kostya Serebryany
acf2228ee8 [libFuzzer] add one more mutation strategy: byte shuffling 
llvm-svn: 244188
 2015-08-06 01:29:13 +00:00
Kostya Serebryany
02e05d0662 [libFuzzer] allow users to supply their own implementation of rand 
llvm-svn: 243078
 2015-07-24 01:06:40 +00:00
Kostya Serebryany
444683ece7 [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
Kostya Serebryany
e460252e97 [lib/Fuzzer] doxygen-ify the comments for the user interface 
llvm-svn: 238086
 2015-05-23 02:12:05 +00:00
Kostya Serebryany
2ee531c66a [lib/Fuzzer] extend the fuzzer interface to allow user-supplied mutators 
llvm-svn: 238059
 2015-05-22 22:35:31 +00:00
Kostya Serebryany
af6cf1face [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