tree 7d0ef7a74d7dd7d3257dae3fee2174c585e2312f
parent 8121f7e95c3040dbeb1b2726d2a53f8a157442a5
author Ed Tanous <etanous@nvidia.com> 1741391505 -0800
committer Ed Tanous <ed@tanous.net> 1742338513 +0000

Add fuzz entropy

Coverage shows that fuzzing has a lot of trouble generating a correct
GUID for a section.  This makes sense, as the guids have a lot of
entropy (on purpose) and the fuzzer would have to check the whole
address space to make progress.

libfuzzer calls this out in their docs, and suggests a common flag,
FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION.

Implement that flag when fuzzing is enabled, and look up the ir callback
based on the first byte of the guid, rather than the entire thing.

Note, this immediately shows length failures.

[1] https://llvm.org/docs/LibFuzzer.html

Change-Id: Idd5654739be3d8de69d60e9deb014d92c067956c
Signed-off-by: Ed Tanous <etanous@nvidia.com>