tree 81279cfaac73b3c1bb6bf85cbf16cce83f497e7d
parent e5728f7df481e5067685d3ee27864dd6715c8d5a
author Ilya Leoshkevich <iii@linux.ibm.com> 1597176968 +0200
committer Copybara-Service <copybara-worker@google.com> 1616739675 -0700

[libFuzzer] Fix minimizing timeouts

When one tries to minimize timeouts using -minimize_crash=1,
minimization immediately fails. The following sequence of events is
responsible for this:

[parent] SIGALRM occurs
[parent] read() returns -EINTR (or -ERESTARTSYS according to strace)
[parent] fgets() returns NULL
[parent] ExecuteCommand() closes child's stdout and returns
[child ] SIGALRM occurs
[child ] AlarmCallback() attempts to write "ALARM: ..." to stdout
[child ] Dies with SIGPIPE without calling DumpCurrentUnit()
[parent] Does not see -exact_artifact_path and exits

When minimizing, the timer in parent is not necessary, so fix by not
setting it in this case.

Reviewed By: morehouse

Differential Revision: https://reviews.llvm.org/D85359

GitOrigin-RevId: 9df7ee34e1b557908c125e9036ad8c54da71a4ef