[compiler-rt] r320237 - [libFuzzer] make the stack depth signal less agressive, otherwise we are sometimes exploding the corpus size. This still needs more analysis and tuning

[Kostya Serebryany via llvm-commits]

Author: kcc
Date: Fri Dec  8 18:45:23 2017
New Revision: 320237

URL: http://llvm.org/viewvc/llvm-project?rev=320237&view=rev
Log:
[libFuzzer] make the stack depth signal less agressive, otherwise we are sometimes exploding the corpus size. This still needs more analysis and tuning

Modified:
    compiler-rt/trunk/lib/fuzzer/FuzzerTracePC.h

Modified: compiler-rt/trunk/lib/fuzzer/FuzzerTracePC.h
URL: http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/lib/fuzzer/FuzzerTracePC.h?rev=320237&r1=320236&r2=320237&view=diff
==============================================================================
--- compiler-rt/trunk/lib/fuzzer/FuzzerTracePC.h (original)
+++ compiler-rt/trunk/lib/fuzzer/FuzzerTracePC.h Fri Dec  8 18:45:23 2017
@@ -275,7 +275,7 @@ void TracePC::CollectFeatures(Callback H
   }
 
   if (auto MaxStackOffset = GetMaxStackOffset())
-    HandleFeature(FirstFeature + MaxStackOffset);
+    HandleFeature(FirstFeature + MaxStackOffset / 128);
 }
 
 extern TracePC TPC;