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31 Commits

Author SHA1 Message Date
Kostya Serebryany
db5325aae3 [libFuzzer] use table of recent compares for memcmp/strcmp (to unify the code between cmp and memcmp handling) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@292287 91177308-0d34-0410-b5e6-96231b3b80d8
 2017-01-17 23:09:05 +00:00
Mike Aizatsky
b1953d8c1b [libfuzzer] custom crossover interface function. 
Differential Revision: http://reviews.llvm.org/D21089

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@272054 91177308-0d34-0410-b5e6-96231b3b80d8
 2016-06-07 20:22:15 +00:00
Kostya Serebryany
22dd3bbcf0 [libFuzzer] simplify FuzzerInterface.h 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@269448 91177308-0d34-0410-b5e6-96231b3b80d8
 2016-05-13 18:04:35 +00:00
Kostya Serebryany
49429cee7f [libFuzzer] don't require seed in fuzzer::Mutate, instead use the global Fuzzer object for fuzzer::Mutate. This makes custom mutators fast 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@260810 91177308-0d34-0410-b5e6-96231b3b80d8
 2016-02-13 06:24:18 +00:00
Kostya Serebryany
5a08f1b013 [libFuzzer] remove the C++-ish variant of FuzzerDriver from the interface 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@260801 91177308-0d34-0410-b5e6-96231b3b80d8
 2016-02-13 03:59:26 +00:00
Kostya Serebryany
f71ac00d01 [libFuzzer] remove UserSuppliedFuzzer from the interface (it was a bad idea). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@260796 91177308-0d34-0410-b5e6-96231b3b80d8
 2016-02-13 02:39:30 +00:00
Kostya Serebryany
e6d7e3d948 [libFuzzer] provide a plain C interface for custom mutators (experimental) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@260794 91177308-0d34-0410-b5e6-96231b3b80d8
 2016-02-13 02:29:38 +00:00
Ivan Krasin
55b3567cb1 Revert r258473 as it's breaking the build with libc++ 
Reviewers: kcc

Differential Revision: http://reviews.llvm.org/D16441

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@258479 91177308-0d34-0410-b5e6-96231b3b80d8
 2016-01-22 03:21:52 +00:00
Ivan Krasin
3e0fdb8944 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

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@258473 91177308-0d34-0410-b5e6-96231b3b80d8
 2016-01-22 01:32:34 +00:00
Kostya Serebryany
429a7edf9b [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 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@258178 91177308-0d34-0410-b5e6-96231b3b80d8
 2016-01-19 20:33:57 +00:00
Kostya Serebryany
1e595319e3 [libFuzzer] introduce LLVMFuzzerInitialize 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@257980 91177308-0d34-0410-b5e6-96231b3b80d8
 2016-01-16 01:23:12 +00:00
Kostya Serebryany
f7dd1d2c0c [libFuzzer] move some code from public interface header to a non-public header. NFC 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@257963 91177308-0d34-0410-b5e6-96231b3b80d8
 2016-01-16 00:04:36 +00:00
Kostya Serebryany
a416b73b12 [libFuzzer] suggest a dictionary to the user of some of the trace-based dictionary entries were successful 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@257736 91177308-0d34-0410-b5e6-96231b3b80d8
 2016-01-14 02:36:44 +00:00
Kostya Serebryany
7fddde9543 [libFuzzer] change the way trace-based mutations are applied. Instead of a custom code just rely on the automatically created dictionary 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@257248 91177308-0d34-0410-b5e6-96231b3b80d8
 2016-01-09 03:08:58 +00:00
Kostya Serebryany
ab240104f0 [libFuzzer] add a position hint to the dictionary-based mutator 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@257013 91177308-0d34-0410-b5e6-96231b3b80d8
 2016-01-07 01:49:35 +00:00
Kostya Serebryany
a1e5f35b02 [libFuzzer] make CrossOver just one of the other mutations 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@256081 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-12-19 02:49:09 +00:00
Kostya Serebryany
7ed616c150 [libFuzzer] print successfull mutations sequences 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@256071 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-12-19 01:09:49 +00:00
Mike Aizatsky
6d5ee5a800 [LibFuzzer] Introducing FUZZER_FLAG_UNSIGNED and using it for seeding. 
Differential Revision: http://reviews.llvm.org/D15339

done

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@255296 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-12-10 20:41:53 +00:00
Kostya Serebryany
b33343ddb1 [libFuzzer] remove some old code; also make __sanitizer_get_total_unique_caller_callee_pairs weak so that newer libFuzzer works with older asan 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@251133 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-10-23 18:37:58 +00:00
Kostya Serebryany
9906eefc84 [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. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@249214 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-10-02 23:34:06 +00:00
Kostya Serebryany
a8d8dba0a6 [libFuzzer] add two more variants of FuzzerDriver for convenience 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@247300 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-09-10 16:57:57 +00:00
Kostya Serebryany
872c556fa8 [libFuzzer] add one more mutator: Mutate_ChangeASCIIInteger 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@247027 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-09-08 17:19:31 +00:00
Kostya Serebryany
6cc3ed7cdd [libFuzzer] actually make the dictionaries work (+docs) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@246825 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-09-04 00:12:11 +00:00
Kostya Serebryany
bf6bd487d5 [libFuzzer] refactor the mutation functions so that they are now methods of a class. NFC 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@246808 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-09-03 21:24:19 +00:00
Kostya Serebryany
397ed3e704 [libFuzzer] move the mutators to public interface so that custom mutators may reuse these functions directly 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@244250 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-08-06 19:19:55 +00:00
Kostya Serebryany
596885b016 [libFuzzer] add one more mutation strategy: byte shuffling 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@244188 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-08-06 01:29:13 +00:00
Kostya Serebryany
33a9a09cd7 [libFuzzer] allow users to supply their own implementation of rand 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@243078 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-07-24 01:06:40 +00:00
Kostya Serebryany
63da212749 [lib/Fuzzer] make assertions more informative and update comments for the user-supplied mutator 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@238658 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-05-30 17:33:13 +00:00
Kostya Serebryany
762dbd0574 [lib/Fuzzer] doxygen-ify the comments for the user interface 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@238086 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-05-23 02:12:05 +00:00
Kostya Serebryany
ebada2c2bc [lib/Fuzzer] extend the fuzzer interface to allow user-supplied mutators 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@238059 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-05-22 22:35:31 +00:00
Kostya Serebryany
ce7a848558 [fuzzer] split main() into FuzzerDriver() that takes a callback as a parameter and a tiny main() in a separate file 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@229882 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-02-19 18:45:37 +00:00