Kostya Serebryany ae0620c4e9 [sanitizer/coverage] Add AFL-style coverage counters (search heuristic for fuzzing). ... Introduce -mllvm -sanitizer-coverage-8bit-counters=1 which adds imprecise thread-unfriendly 8-bit coverage counters. The run-time library maps these 8-bit counters to 8-bit bitsets in the same way AFL (http://lcamtuf.coredump.cx/afl/technical_details.txt) does: counter values are divided into 8 ranges and based on the counter value one of the bits in the bitset is set. The AFL ranges are used here: 1, 2, 3, 4-7, 8-15, 16-31, 32-127, 128+. These counters provide a search heuristic for single-threaded coverage-guided fuzzers, we do not expect them to be useful for other purposes. Depending on the value of -fsanitize-coverage=[123] flag, these counters will be added to the function entry blocks (=1), every basic block (=2), or every edge (=3). Use these counters as an optional search heuristic in the Fuzzer library. Add a test where this heuristic is critical. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@231166 91177308-0d34-0410-b5e6-96231b3b80d8		2015-03-03 23:27:02 +00:00
..
unit
CMakeLists.txt	[sanitizer/coverage] Add AFL-style coverage counters (search heuristic for fuzzing).	2015-03-03 23:27:02 +00:00
CounterTest.cpp	[sanitizer/coverage] Add AFL-style coverage counters (search heuristic for fuzzing).	2015-03-03 23:27:02 +00:00
FourIndependentBranchesTest.cpp	[fuzzer] one more experimental search mode: -use_coverage_pairs=1	2015-02-20 03:02:37 +00:00
FullCoverageSetTest.cpp
fuzzer.test	[sanitizer/coverage] Add AFL-style coverage counters (search heuristic for fuzzing).	2015-03-03 23:27:02 +00:00
FuzzerUnittest.cpp
InfiniteTest.cpp
lit.cfg
lit.site.cfg.in
NullDerefTest.cpp
SimpleTest.cpp
TimeoutTest.cpp