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33 Commits

Author SHA1 Message Date
Kostya Serebryany
04777c43f9 [libFuzzer] do not initialize parts of TracePC -- let them be initialized by the linker. Add no-msan attribute to the memcmp hook. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@286665 91177308-0d34-0410-b5e6-96231b3b80d8
 2016-11-11 23:06:53 +00:00
Kostya Serebryany
56a90b623f [libFuzzer] speculatively trying to fix the Mac build; second attempt 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@285262 91177308-0d34-0410-b5e6-96231b3b80d8
 2016-10-27 00:36:38 +00:00
Kostya Serebryany
9df8914246 [libFuzzer] revert 285259 -- hit commit too soon 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@285260 91177308-0d34-0410-b5e6-96231b3b80d8
 2016-10-27 00:24:34 +00:00
Kostya Serebryany
06289376f7 [libFuzzer] speculatively trying to fix the Mac build 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@285259 91177308-0d34-0410-b5e6-96231b3b80d8
 2016-10-27 00:22:39 +00:00
Kostya Serebryany
3c0deb17ec [libFuzzer] simplify TracePC::HandleTrace even further. Also, when dealing with -exit_on_src_pos, symbolize every PC only once 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@285223 91177308-0d34-0410-b5e6-96231b3b80d8
 2016-10-26 18:52:04 +00:00
Kostya Serebryany
7f59a4b62d [libFuzzer] simplify the code in TracePC::HandleTrace a bit more 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@285147 91177308-0d34-0410-b5e6-96231b3b80d8
 2016-10-26 00:42:52 +00:00
Kostya Serebryany
9c904557f1 [libFuzzer] simplify the code to print new PCs 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@285145 91177308-0d34-0410-b5e6-96231b3b80d8
 2016-10-26 00:20:51 +00:00
Kostya Serebryany
cbe5db8703 [libFuzzer] simplify the code in TracePC::HandleTrace 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@285142 91177308-0d34-0410-b5e6-96231b3b80d8
 2016-10-25 23:52:25 +00:00
Kostya Serebryany
d2c91bff2f [libFuzzer] simplify the code for use_cmp, also use the position hint when available, add a test 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@285049 91177308-0d34-0410-b5e6-96231b3b80d8
 2016-10-25 02:04:43 +00:00
Kostya Serebryany
3af68729f8 [libFuzzer] add -trace_cmp=1 (guiding mutations based on the observed CMP instructions). This is a reincarnation of the previously deleted -use_traces, but using a different approach for collecting traces. Still a toy, but at least it scales well. Also fix -merge in trace-pc-guard mode 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@284273 91177308-0d34-0410-b5e6-96231b3b80d8
 2016-10-14 20:20:33 +00:00
Kostya Serebryany
53176d2749 [libFuzzer] reapply r283946: refactoring to speed things up, NFC. Now with a fix for gcc build 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@284132 91177308-0d34-0410-b5e6-96231b3b80d8
 2016-10-13 16:19:09 +00:00
Daniel Jasper
6f0cfa7ab9 Revert "[libFuzzer] refactoring to speed things up, NFC" 
This reverts commit r283946.

This breaks when build with GCC:
lib/Fuzzer/FuzzerTracePC.cpp:169:6: error: always_inline function might not be inlinable [-Werror=attributes]
lib/Fuzzer/FuzzerTracePC.cpp:169:6: error: inlining failed in call to always_inline 'void fuzzer::TracePC::HandleCmp(void*, T, T) [with T = long unsigned int]': target specific option mismatch
lib/Fuzzer/FuzzerTracePC.cpp:198:65: error: called from here

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@283979 91177308-0d34-0410-b5e6-96231b3b80d8
 2016-10-12 07:26:46 +00:00
Kostya Serebryany
61ec54d21d [libFuzzer] refactoring to speed things up, NFC 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@283946 91177308-0d34-0410-b5e6-96231b3b80d8
 2016-10-11 21:27:37 +00:00
Kostya Serebryany
bb0318af25 [libFuzzer] implement value profile for switch, increase the size of the PCs array, make sure we don't overflow it 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@283841 91177308-0d34-0410-b5e6-96231b3b80d8
 2016-10-11 01:14:41 +00:00
Kostya Serebryany
cc6cbfdebc [libFuzzer] refactoring to make -shrink=1 work for value profile, added a test. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@283409 91177308-0d34-0410-b5e6-96231b3b80d8
 2016-10-05 22:56:21 +00:00
Kostya Serebryany
d4d50f6f47 [libFuzzer] add ShrinkValueProfileTest, move code around, NFC 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@283286 91177308-0d34-0410-b5e6-96231b3b80d8
 2016-10-05 01:09:40 +00:00
Kostya Serebryany
f46303af79 [libFuzzer] implement the -shrink=1 option that tires to make elements of the corpus smaller, off by default 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@282995 91177308-0d34-0410-b5e6-96231b3b80d8
 2016-10-01 01:04:29 +00:00
Kostya Serebryany
ec49d2d369 [libFuzzer] more the feature set to InputCorpus; on feature update, change the feature counter of the old best input 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@282829 91177308-0d34-0410-b5e6-96231b3b80d8
 2016-09-30 01:19:56 +00:00
Kostya Serebryany
efa54824a3 [sanitizer-coverage/libFuzzer] make the guards for trace-pc 32-bit; create one array of guards per function, instead of one guard per BB. reorganize the code so that trace-pc-guard does not create unneeded globals 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@282735 91177308-0d34-0410-b5e6-96231b3b80d8
 2016-09-29 17:43:24 +00:00
Kostya Serebryany
d3cf92ddf9 [libFuzzer] speedup TracePC::FinalizeTrace 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@282562 91177308-0d34-0410-b5e6-96231b3b80d8
 2016-09-28 01:16:24 +00:00
Kostya Serebryany
65f502816c [libFuzzer] add -exit_on_src_pos to test libFuzzer itself, add a test script for RE2 that uses this flag 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@282458 91177308-0d34-0410-b5e6-96231b3b80d8
 2016-09-27 00:10:20 +00:00
Kostya Serebryany
e2e54904b7 [libFuzzer] simplify HandleTrace again, start re-running interesting units and collecting their features. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@282316 91177308-0d34-0410-b5e6-96231b3b80d8
 2016-09-23 23:51:58 +00:00
Kostya Serebryany
a6754db00d [libFuzzer] reset Counters (trace-pc-guard) before every run 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@282284 91177308-0d34-0410-b5e6-96231b3b80d8
 2016-09-23 20:04:13 +00:00
Kostya Serebryany
fd1fd77cb1 [libFuzzer] be more precise about what we reset in TracePC 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@282225 91177308-0d34-0410-b5e6-96231b3b80d8
 2016-09-23 02:18:59 +00:00
Kostya Serebryany
07016d4bd5 [libFuzzer] fix merging with trace-pc-guard 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@282224 91177308-0d34-0410-b5e6-96231b3b80d8
 2016-09-23 01:58:51 +00:00
Kostya Serebryany
73508a3cb1 [libFuzzer] simplify the TracePC logic 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@282222 91177308-0d34-0410-b5e6-96231b3b80d8
 2016-09-23 01:20:07 +00:00
Kostya Serebryany
5a965a68f3 [libFuzzer] move value profiling logic into TracePC 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@282219 91177308-0d34-0410-b5e6-96231b3b80d8
 2016-09-23 00:46:18 +00:00
Kostya Serebryany
28f017d845 [libFuzzer] change ValueBitMap to remember the number of bits in it 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@282216 91177308-0d34-0410-b5e6-96231b3b80d8
 2016-09-23 00:22:46 +00:00
Kostya Serebryany
e9b850b5c5 [libFuzzer] add 'features' to the corpus elements, allow mutations with Size > MaxSize, fix sha1 in corpus stats; various refactorings 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@282129 91177308-0d34-0410-b5e6-96231b3b80d8
 2016-09-22 01:34:58 +00:00
Kostya Serebryany
e52f15bf1a [libFuzzer] more refactoring 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@282113 91177308-0d34-0410-b5e6-96231b3b80d8
 2016-09-21 21:17:23 +00:00
Kostya Serebryany
2a546868cb [libFuzzer] refactoring: split the large header into many; NFC 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@282044 91177308-0d34-0410-b5e6-96231b3b80d8
 2016-09-21 01:50:50 +00:00
Kostya Serebryany
b4d6119096 [libFuzzer] refactoring around PCMap, NFC 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@278825 91177308-0d34-0410-b5e6-96231b3b80d8
 2016-08-16 17:37:13 +00:00
Mike Aizatsky
0d68393b0f [libfuzzer] Refactoring coverage state-management code. 
It is now less state-dependent and will allow easier comparing of
coverages of different units.

Differential Revision: http://reviews.llvm.org/D20085

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@269140 91177308-0d34-0410-b5e6-96231b3b80d8
 2016-05-10 23:43:15 +00:00