[PATCH] D100161: Redistribute energy for Corpus

[taotao gu via Phabricator via cfe-commits]

gtt1995 created this revision.
gtt1995 added reviewers: 01alchemist, 0b01.
gtt1995 requested review of this revision.
Herald added projects: clang, Sanitizers.
Herald added subscribers: Sanitizers, cfe-commits.

Divide the corpus into n parts according to size. Each job executes each corpus in turn, Job one executes the corpus with the smallest size, Job two executes the relatively larger corpus,...Job N executes the seed of the largest corpus, in turn,. i.e. each job choose some seeds from corpus 1, corpus2 2,..., corpus N, corpus1,corpus2...corpus N .....
that is, allocate more energy to the small seeds, trigger the common path in advance, and prefer to keep the small seeds.
In my experiment , It is found that the bugs rate is greatly accelerated, the cov is greatly increased (equal to the effect of entropic improvement), and the size of the newly generated interesting seeds is very small.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D100161

Files:
  clang/tools/clang-format/clang-format.py
  compiler-rt/lib/fuzzer/FuzzerDriver.cpp
  compiler-rt/lib/fuzzer/FuzzerFlags.def
  compiler-rt/lib/fuzzer/FuzzerFork.cpp
  compiler-rt/lib/fuzzer/FuzzerFork.h

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