[binutils-gdb] non-stop-fair-events.exp slower on software single-step && !displ-step targets

[sergiodj+buildbot at redhat dot com]

*** TEST RESULTS FOR COMMIT 1ed415e2b9b985aac087c35949d0e1e489ab496d ***

Author: Pedro Alves <palves@redhat.com>
Branch: master
Commit: 1ed415e2b9b985aac087c35949d0e1e489ab496d

non-stop-fair-events.exp slower on software single-step && !displ-step targets

On software single-step targets that don't support displaced stepping,
threads keep hitting each other's single-step breakpoints, and then
GDB needs to pause all threads to step past those.  The end result is
that progress in the main thread will be slower and it may take a bit
longer for the signal to be queued.  This patch bumps the timeout on
such targets.

gdb/testsuite/ChangeLog:
2015-09-16  Pedro Alves  <palves@redhat.com>
	    Sandra Loosemore <sandra@codesourcery.com>

	* gdb.threads/non-stop-fair-events.c (timeout): New global.
	(SECONDS): Redefine.
	(main): Call pthread_kill and alarm early.
	* gdb.threads/non-stop-fair-events.exp: Probe displaced stepping
	support.
	(test): If the target can't hardware step and doesn't support
	displaced stepping, increase the timeout.