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197 Commits

Author SHA1 Message Date
Kostya Serebryany ce925c580e [libFuzzer] hot fix a test 
llvm-svn: 259732
 2016-02-04 00:12:28 +00:00
Kostya Serebryany b92602ada0 [libFuzzer] don't write the test unit when a leak is detected (since we don't know which unit causes the leak) 
llvm-svn: 259731
 2016-02-04 00:02:17 +00:00
Kostya Serebryany d88d1305c4 [libFuzzer] don't create too many trace-based mutations as it may be too slow 
llvm-svn: 259600
 2016-02-02 23:17:45 +00:00
Kostya Serebryany bfbe7fc404 [libFuzzer] allow passing 1 or more files as individual inputs 
llvm-svn: 259459
 2016-02-02 03:03:47 +00:00
Kostya Serebryany 078e984d8d [libFuzzer] fail if the corpus dir does not exist 
llvm-svn: 259454
 2016-02-02 02:07:26 +00:00
Kostya Serebryany 54a6363a8f [libFuzzer] add -timeout_exitcode option 
llvm-svn: 259265
 2016-01-29 23:30:07 +00:00
Kostya Serebryany 085ca4131f [libFuzzer] re-enable test for -abort_on_timeout=1, this time protecting from ASAN_OPTIONS set outside 
llvm-svn: 259263
 2016-01-29 23:19:00 +00:00
Ivan Krasin d7785e75f3 Temporary disable broken fuzzer/timeout tests. 
Reviewers: kcc

Differential Revision: http://reviews.llvm.org/D16543

llvm-svn: 258702
 2016-01-25 19:05:45 +00:00
Kostya Serebryany 9768e7f06b [libFuzzer] add -abort_on_timeout option 
llvm-svn: 258631
 2016-01-23 19:34:19 +00:00
Kostya Serebryany 160dcba81f [libFuzzer] add more fields to DictionaryEntry to count the number of uses and successes 
llvm-svn: 258589
 2016-01-22 23:55:14 +00:00
Ivan Krasin df91910bd4 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: this is the second attempt (prev: r258473). Now, libc++ build is fixed.

Reviewers: aizatsky, kcc

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D16487

llvm-svn: 258571
 2016-01-22 22:28:27 +00:00
Ivan Krasin d84f74cab7 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 b008fd4d89 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 b5e984992a [libFuzzer] don't do expensive memmem if the result will not be used 
llvm-svn: 258462
 2016-01-22 01:04:58 +00:00
Kostya Serebryany 2f13f223c7 [libFuzzer] don't use std::vector in one more hot path 
llvm-svn: 258380
 2016-01-21 01:52:14 +00:00
Mike Aizatsky e313f8f8ff [libfuzzer] use %p for printing addresses 
llvm-svn: 258370
 2016-01-21 00:02:09 +00:00
Kostya Serebryany 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
Kostya Serebryany 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
Kostya Serebryany aca7696f4d [libFuzzer] introduce LLVMFuzzerInitialize 
llvm-svn: 257980
 2016-01-16 01:23:12 +00:00
Kostya Serebryany 628bc3ec00 [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 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
Kostya Serebryany 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
Kostya Serebryany 4b35874b2a [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 98abb2c90a [libFuzzer] make CurrentUnit a POD object instead of vector to avoid extra allocations 
llvm-svn: 257713
 2016-01-13 23:46:01 +00:00
Kostya Serebryany d50a3eedb4 [libFuzzer] make sure we find buffer overflow in the input buffer. Previously, re-using the same vector object was hiding buffer overflows (unless we used annotated vector) 
llvm-svn: 257701
 2016-01-13 23:02:30 +00:00
Kostya Serebryany 72fdb32dac [libFuzzer] make sure to update CurrentUnit when drilling 
llvm-svn: 257560
 2016-01-13 01:58:27 +00:00
Kostya Serebryany 4b83a4f6fe [libFuzzer] add a macro LLVM_FUZZER_DEFINES_SANITIZER_WEAK_HOOOKS 
llvm-svn: 257482
 2016-01-12 16:50:18 +00:00
Kostya Serebryany 4174005622 [libFuzzer] when a new unit is discovered using a dictionary, print all used dictionary entries 
llvm-svn: 257435
 2016-01-12 02:36:59 +00:00
Kostya Serebryany 859e86d962 [libFuzzer] add various debug prints. Also don't mutate based on a cmp trace like (a eq a) or (a neq a) 
llvm-svn: 257434
 2016-01-12 02:08:37 +00:00
Kostya Serebryany e3580956ea [libFuzzer] extend the weak memcmp/strcmp/strncmp interceptors to receive the result of the computations. With that, don't do any mutations if memcmp/etc returned 0 
llvm-svn: 257423
 2016-01-12 00:43:42 +00:00
Kostya Serebryany 1f9c40db1d [libFuzzer] debug prints in tracing 
llvm-svn: 257249
 2016-01-09 03:46:08 +00:00
Kostya Serebryany 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
Kostya Serebryany c573316eee [libFuzzer] don't limit memcmp tracing with 8 bytes 
llvm-svn: 257245
 2016-01-09 01:39:55 +00:00
Kostya Serebryany e7583d21e3 [libFuzzer] refactor the way we collect cmp traces (don't use std::vector, don't limit with 8 bytes) 
llvm-svn: 257239
 2016-01-09 00:38:40 +00:00
Kostya Serebryany 152ac7ad70 [libFuzzer] add a position hint to the dictionary-based mutator 
llvm-svn: 257013
 2016-01-07 01:49:35 +00:00
Kostya Serebryany 80eb76abf4 [libFuzzer] extend the dictionary mutator to optionally overwrite data with the dict entry 
llvm-svn: 256900
 2016-01-06 02:13:04 +00:00
Mike Aizatsky 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
Kostya Serebryany 226b734d73 [libFuzzer] make trace-based fuzzing not crash in presence of threads 
llvm-svn: 256876
 2016-01-06 00:03:35 +00:00
Kostya Serebryany b0fb6e8508 [libFuzzer] add AFL-style dictionary for C++, remove the old file with tokens 
llvm-svn: 256229
 2015-12-22 01:50:51 +00:00
Kostya Serebryany 550e9c80a6 [libFuzzer] deprecate -save_minimized_corpus, -merge can be used instead 
llvm-svn: 256086
 2015-12-19 03:42:16 +00:00
Kostya Serebryany bf65644c97 [libFuzzer] split the tests to run them in parallel, remove one redundant test 
llvm-svn: 256085
 2015-12-19 03:35:30 +00:00
Kostya Serebryany 27ab2d759f [libFuzzer] make CrossOver just one of the other mutations 
llvm-svn: 256081
 2015-12-19 02:49:09 +00:00
Kostya Serebryany 14c50288cc [libFuzzer] print successfull mutations sequences 
llvm-svn: 256071
 2015-12-19 01:09:49 +00:00
Peter Collingbourne 16c1978760 Fuzzer: Fix library dependencies. 
Newer versions of libstdc++ (4.9+), as well as libc++, depend directly on
libpthread from the standard library headers, so libfuzzer needs to declare
a standard library dependency.

llvm-svn: 255745
 2015-12-16 02:14:57 +00:00
Mike Aizatsky 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
Kostya Serebryany 8617aaaac2 [libFuzzer] don't reload the corpus more than once every second 
llvm-svn: 254824
 2015-12-05 02:09:22 +00:00
Kostya Serebryany 9e48cda9bc [libFuzzer] compute base64 in-process instead of using an external lib. Since libFuzzer should not depend on anything, just re-implement base64 encoder. PR25746 
llvm-svn: 254784
 2015-12-04 22:29:39 +00:00
Mike Aizatsky 71552ce64b Libfuzzer: do not pass null into user function 
Differential Revision: http://reviews.llvm.org/D15098

llvm-svn: 254558
 2015-12-02 22:43:53 +00:00
Kostya Serebryany fba04273b7 [libFuzzer] add a test that is built with -fsanitize-coverage=trace-bb 
llvm-svn: 254484
 2015-12-02 02:49:37 +00:00
Kostya Serebryany 2d0ef14f5d [libFuzzer] add a flag -exact_artifact_path 
llvm-svn: 254100
 2015-11-25 21:40:46 +00:00