tree 7f782a96e3d4a1f7bfb3b6af30a02d6528a458bf
parent 7d0a6f49d83c63ad2fe8470d84ecf812be1db8ed
author Max Moroz <mmoroz@chromium.org> 1560540851 +0000
committer Copybara-Service <copybara-worker@google.com> 1616739596 -0700

[libFuzzer] Disable len_control by default if LLVMFuzzerCustomMutator is used.

Summary:
Some custom mutators may not peform well when size restriction is
enforced by len_control. Because of that, it's safer to disable len_control
by default in such cases, but still allow users to enable it manually.
Bug example: https://bugs.chromium.org/p/chromium/issues/detail?id=919530.

Tested manually with LPM-based and regular fuzz targets.

Reviewers: kcc, vitalybuka, metzman

Reviewed By: kcc, metzman

Subscribers: delcypher, #sanitizers, llvm-commits

Tags: #llvm, #sanitizers

Differential Revision: https://reviews.llvm.org/D63334

llvm-svn: 363443
GitOrigin-RevId: 0784e01a98a01d30474655702051e9f4542ccc31