tree b266635490fee025605b4daa97454425789c1598
parent d4f42b1541e818f4bd9ec11fab8e53c6d4a94b58
author Dokyung Song <dokyungs@google.com> 1596154040 +0000
committer Copybara-Service <copybara-worker@google.com> 1616739687 -0700

[libFuzzer] Add an option to keep initial seed inputs around.

This patch adds an option "keep_seed" to keep all initial seed inputs in the
corpus. Previously, only the initial seed inputs that find new coverage were
added to the corpus, and all the other initial inputs were discarded. We
observed in some circumstances that useful initial seed inputs are discarded as
they find no new coverage, even though they contain useful fragments in them
(e.g., SQLITE3 FuzzBench benchmark). This newly added option provides a way to
keeping seed inputs in the corpus for those circumstances. With this patch, and
with -keep_seed=1, all initial seed inputs are kept in the corpus regardless of
whether they find new coverage or not. Further, these seed inputs are not
replaced with smaller inputs even if -reduce_inputs=1.

Differential Revision: https://reviews.llvm.org/D86577

GitOrigin-RevId: 62673c430de43837b0f177089ed184a0ffcd5678