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4 Commits

Author SHA1 Message Date
Matt Morehouse e2d0b44a7c [DFSan] Add efficient fast16labels instrumentation mode. 
Adds the -fast-16-labels flag, which enables efficient instrumentation
for DFSan when the user needs <=16 labels.  The instrumentation
eliminates most branches and most calls to __dfsan_union or
__dfsan_union_load.

Reviewed By: vitalybuka

Differential Revision: https://reviews.llvm.org/D84371
 2020-07-29 18:58:47 +00:00
Kostya Serebryany 679669a77e [libFuzzer] split DataFlow.cpp into two .cpp files, one of which can be compiled w/o dfsan to speed things up (~25% speedup) 
llvm-svn: 364002
 2019-06-21 01:39:35 +00:00
Kostya Serebryany db88fc56b9 [libFuzzer] implement a better queue for the fork mode. Add an internal flag -stop_file to allow graceful shutdown of fuzzing. Enhance the logging in the fork mode 
llvm-svn: 363470
 2019-06-14 22:56:50 +00:00
Kostya Serebryany b7cc3d9953 [libFuzzer] automatically collect the data flow trace (DFT) in the fork mode if -collect_data_flow= is given 
llvm-svn: 361448
 2019-05-23 00:22:46 +00:00