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17 Commits

Author SHA1 Message Date
Kostya Serebryany 8ce7424e9c [libFuzzer] start refactoring the Mutator and adding tests to it 
llvm-svn: 243817
 2015-08-01 01:42:51 +00:00
Kostya Serebryany fe7e41e8f5 [libFuzzer] make sure that 2-byte arguments of switch() are handled properly 
llvm-svn: 243781
 2015-07-31 20:58:55 +00:00
Kostya Serebryany 73932e5fe3 [libFuzzer] record traces from the switch statements only when told to do so 
llvm-svn: 243768
 2015-07-31 18:09:08 +00:00
Kostya Serebryany cd6a4665e0 [libFuzzer] support switch interception in dfsan mode 
llvm-svn: 243760
 2015-07-31 17:05:05 +00:00
Kostya Serebryany fb7d8d9d06 [libFuzzer] trace switch statements and apply mutations based on the expected case values 
llvm-svn: 243726
 2015-07-31 01:33:06 +00:00
Kostya Serebryany c9dc96bfc6 [libFuzzer] fix the strncmp interceptor -- it should respect short strings. 
llvm-svn: 243691
 2015-07-30 21:22:22 +00:00
Kostya Serebryany b74ba421fc [libFuzzer] implement strncmp hook for data-flow-guided fuzzing (w/ and w/o dfsan), add a test 
llvm-svn: 243611
 2015-07-30 02:33:45 +00:00
Kostya Serebryany 0e776a2250 [libFuzzer] implement memcmp hook for data-flow-guided fuzzing (w/o dfsan), extend the memcmp fuzzer test 
llvm-svn: 243603
 2015-07-30 01:34:58 +00:00
Kostya Serebryany ae7df1ca4d [libFuzzer] ensure that the dfsan tracing hooks actually run (using -verbosity=3 in tests) 
llvm-svn: 243365
 2015-07-28 01:25:00 +00:00
Kostya Serebryany 35959592a3 [libFuzzer] when using cmp traces, first check that the CMP is evaluated to one value much more frequently than to the other value (heuristic) 
llvm-svn: 243363
 2015-07-28 00:59:53 +00:00
Kostya Serebryany 404c69f2c8 [libFuzzer] allow users to supply their own implementation of rand 
llvm-svn: 243078
 2015-07-24 01:06:40 +00:00
Kostya Serebryany 3fe7682fb0 [lib/Fuzzer] relax an assertion 
llvm-svn: 238608
 2015-05-29 20:31:17 +00:00
Kostya Serebryany 7c180eafc1 [lib/Fuzzer] fully get rid of std::cerr in libFuzzer 
llvm-svn: 238081
 2015-05-23 01:22:35 +00:00
Kostya Serebryany 20e9bcbfc8 [lib/Fuzzer] start getting rid of std::cerr. Sadly, these parts of C++ library used in libFuzzer badly interract with the same code used in the target function and also with dfsan. It's easier to just not use std::cerr than to defeat these issues. 
llvm-svn: 238078
 2015-05-23 01:07:46 +00:00
Kostya Serebryany d8c54724a8 [lib/Fuzzer] remove the -dfsan=1 flag, just use -use_traces=1 (w/ or w/o dfsan) 
llvm-svn: 237083
 2015-05-12 01:58:34 +00:00
Kostya Serebryany 8817e86efd [lib/Fuzzer] don't record traces when trace collection is off 
llvm-svn: 237067
 2015-05-11 23:25:28 +00:00
Kostya Serebryany 225262562f [lib/Fuzzer] rename FuzzerDFSan.cpp to FuzzerTraceState.cpp; update comments. NFC expected 
llvm-svn: 237050
 2015-05-11 21:16:27 +00:00