tree 9e29a92338cb3c7793ef160c1a4089613b8a5ee6
parent e2d70da8b4922b2839344d78db980b1dd7daf767
author Yuanfang Chen <yuanfang.chen@sony.com> 1581373907 -0800
committer Copybara-Service <copybara-worker@google.com> 1616739640 -0700

[libFuzzer] communicate through pipe to subprocess for MinimizeCrashInput

For CleanseCrashInput, discards stdout output anyway since it is not used.

These changes are to defend against aggressive PID recycle on windows to reduce the chance of contention on files.

Using pipe instead of file also workaround the problem that when the
process is spawned by llvm-lit, the aborted process keeps a handle to the
output file such that the output file can not be removed. This will
cause random test failures.

https://devblogs.microsoft.com/oldnewthing/20110107-00/?p=11803

Reviewers: kcc, vitalybuka

Reviewed By: vitalybuka

Differential Revision: https://reviews.llvm.org/D73329

GitOrigin-RevId: 85515c7fd53c0cb77ccf46eaa5246ac61ae08ee8