tree c88ad4421bad3f8ed413137ec18d6e16ba512079
parent e0dd84f01629380625e5cf7d454d26343a46eaeb
author Calder Kitagawa <ckitagawa@chromium.org> 1527783481 +0000
committer Edward Lesmes <ehmaldonado@google.com> 1627080432 +0000

[Zucchini]: Write fuzz generated patches

As discussed in the tracking bug this covers buffer_sink and
patch_writer for fuzzing by serializing the generated patch data into a
buffer. Locally this increased fuzzing coverage by ~2%. exec/s for ZTF
files is still > 1500 which is sufficient for ClusterFuzz performance.

Eventually fuzzing should be added for:
- imposed_ensemble_matcher
- disassembler_dex

But is out of scope for Windows Launch.

It may also be worth adding an apply seed for a tiny Windows binary.
Chromium doesn't contain one small enough so we may need to make a
custom test binary to patch (likely Hello World or similar).

Bug: 835341
Change-Id: Id7208f30b09cd7443287cfe10f8ef1fcda6327d1
Reviewed-on: https://chromium-review.googlesource.com/1076949
Commit-Queue: Calder Kitagawa <ckitagawa@chromium.org>
Reviewed-by: Greg Thompson <grt@chromium.org>
Reviewed-by: Max Moroz <mmoroz@chromium.org>
Reviewed-by: Samuel Huang <huangs@chromium.org>
Cr-Commit-Position: refs/heads/master@{#563266}
NOKEYCHECK=True
GitOrigin-RevId: 49613c27bcd84170395588a6d93fc009eb988658