[PATCH 4/7] [gdb/testsuite] Factor out proc lock_dir

[Tom de Vries <tdevries@suse.de>]

In lib/rocm.exp we have:
...
set gpu_lock_filename $objdir/gpu-parallel.lock
...

This decides both the lock file name and directory.

Factor out a new proc lock_dir that decides on the directory, leaving just:
...
set gpu_lock_filename gpu-parallel.lock
...

Tested on aarch64-linux.
---
 gdb/testsuite/lib/gdb-utils.exp | 7 +++++++
 gdb/testsuite/lib/rocm.exp      | 2 +-
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/gdb/testsuite/lib/gdb-utils.exp b/gdb/testsuite/lib/gdb-utils.exp
index 4205f8d1a22..c0b96d3c2bf 100644
--- a/gdb/testsuite/lib/gdb-utils.exp
+++ b/gdb/testsuite/lib/gdb-utils.exp
@@ -177,10 +177,17 @@ proc lock_file_release {info} {
     }
 }
 
+# Return directory where we keep lock files.
+
+proc lock_dir {} {
+    return $objdir
+}
+
 # Run body under lock LOCK_FILE.
 
 proc with_lock { lock_file body } {
     if {[info exists ::GDB_PARALLEL]} {
+	set lock_file [file join [lock_dir] $lock_file]
 	set lock_rc [lock_file_acquire $lock_file]
     }
 
diff --git a/gdb/testsuite/lib/rocm.exp b/gdb/testsuite/lib/rocm.exp
index 7dd7ef3f3b5..2276bb3640e 100644
--- a/gdb/testsuite/lib/rocm.exp
+++ b/gdb/testsuite/lib/rocm.exp
@@ -106,7 +106,7 @@ gdb_caching_proc allow_hipcc_tests {} {
 
 # The lock file used to ensure that only one GDB has access to the GPU
 # at a time.
-set gpu_lock_filename $objdir/gpu-parallel.lock
+set gpu_lock_filename gpu-parallel.lock
 
 # Run body under the GPU lock.  Also calls gdb_exit before releasing
 # the GPU lock.
-- 
2.35.3