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14 Commits

Author SHA1 Message Date
Marcos Pividori 5a53567620 [libFuzzer] Use long long to ensure 64 bits. 
We should always use unsigned long long to ensure 64 bits. On Windows, unsigned
long is 4 bytes. This was the reason why value-profile-cmp4.test was failing on
Windows.

Differential Revision: https://reviews.llvm.org/D29617

llvm-svn: 294390
 2017-02-08 00:03:31 +00:00
Kostya Serebryany 70182deaae [libFuzzer] simplify the value profiling callback further: don't use (idx MOD prime) on the hot path where it is useless anyway 
llvm-svn: 293239
 2017-01-27 00:39:12 +00:00
Kostya Serebryany 7f058972ee [libFuzzer] simplify the value profile code and disable asan/msan on it 
llvm-svn: 293236
 2017-01-27 00:09:59 +00:00
Kostya Serebryany 1c73f1bf27 [libFuzzer] refactoring to make -shrink=1 work for value profile, added a test. 
llvm-svn: 283409
 2016-10-05 22:56:21 +00:00
Kostya Serebryany a9a135b4f5 [libFuzzer] initialize ValueBitMap::NumBits 
llvm-svn: 282721
 2016-09-29 15:51:28 +00:00
Kostya Serebryany 0800b81a21 [libFuzzer] simplify HandleTrace again, start re-running interesting units and collecting their features. 
llvm-svn: 282316
 2016-09-23 23:51:58 +00:00
Kostya Serebryany d28099de5d [libFuzzer] change ValueBitMap to remember the number of bits in it 
llvm-svn: 282216
 2016-09-23 00:22:46 +00:00
Kostya Serebryany 8658618ea0 [libFuzzer] more refactoring 
llvm-svn: 282113
 2016-09-21 21:17:23 +00:00
Kostya Serebryany 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
Kostya Serebryany bceadcf1cd [libFuzzer] use __attribute__((target("popcnt"))) only on x86_64 
llvm-svn: 279601
 2016-08-24 01:38:42 +00:00
Kostya Serebryany 5a5d5548f0 [libFuzzer] force proper popcnt instruction 
llvm-svn: 279002
 2016-08-17 23:09:57 +00:00
Kostya Serebryany 3044390af1 [libFuzzer] minor speed improvement 
llvm-svn: 278856
 2016-08-16 21:28:05 +00:00
Kostya Serebryany 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
Kostya Serebryany c98ef718ea [libFuzzer] refactoring around PCMap, NFC 
llvm-svn: 278825
 2016-08-16 17:37:13 +00:00