[gdb/testsuite] Move gpu-parallel.lock to cache dir
commita0a6e110198c4f7fb4b5baa1f8d158ebf225f7e2
authorTom de Vries <tdevries@suse.de>
Sat, 4 May 2024 08:41:09 +0000 (4 10:41 +0200)
committerTom de Vries <tdevries@suse.de>
Sat, 4 May 2024 08:41:09 +0000 (4 10:41 +0200)
treec9ee213bf0e277316b75b38981878dd731c63033
parent007a7cb675ff2aa2a5f22fdcacf17553ee4ae427
[gdb/testsuite] Move gpu-parallel.lock to cache dir

The lock directory returned by lock_dir is currently $objdir.

It seems possible to leave a stale lock file that blocks progress in a
following run.

Fix this by using a directory that is guaranteed to be initially empty when
using GDB_PARALLEL, like temp or cache.

In gdb/testsuite/README I found:
...
cache in particular is used to share data across invocations of runtest
...
which seems appropriate, so let's use cache for this.

Tested on aarch64-linux.

Approved-By: Tom Tromey <tom@tromey.com>
gdb/testsuite/lib/gdb-utils.exp