[PATCH] [testsuite] gdb.base/dlmopen: Fix test name and use gdb_attach

[Lancelot SIX <lancelot.six@amd.com>]

One test name in gdb.base/dlmopen.exp changes from run to run
since it includes a process id:

    PASS: gdb.base/dlmopen.exp: attach 3442682

This is not convenient do diff gdb.sum files to compare test runs.

Fix by using gdb_attach helper function to handle attaching to the
process as it produce a constant test name.

While at it also check gdb_attach's return value to only run the
rest of the test if the attach was successful.
---
 gdb/testsuite/gdb.base/dlmopen.exp | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/gdb/testsuite/gdb.base/dlmopen.exp b/gdb/testsuite/gdb.base/dlmopen.exp
index a80db75f9ac..9a2c9d78636 100644
--- a/gdb/testsuite/gdb.base/dlmopen.exp
+++ b/gdb/testsuite/gdb.base/dlmopen.exp
@@ -159,16 +159,16 @@ set test_spawn_id [spawn_wait_for_attach $binfile]
 set testpid [spawn_id_get_pid $test_spawn_id]
 
 # Attach.
-gdb_test "attach $testpid" "Attaching to program.*, process $testpid.*"
+if { [gdb_attach $testpid] } {
+    with_test_prefix "attach" {
+	# Remove the pause.  We no longer need it.
+	gdb_test "print wait_for_gdb = 0" "\\\$1 = 0"
 
-with_test_prefix "attach" {
-    # Remove the pause.  We no longer need it.
-    gdb_test "print wait_for_gdb = 0" "\\\$1 = 0"
+	# Set the same breakpoints again.  This time, however, we do not allow the
+	# breakpoint to be pending since the library has already been loaded.
+	gdb_breakpoint $srcfile_lib:$bp_inc
+	gdb_breakpoint $srcfile:$bp_main
 
-    # Set the same breakpoints again.  This time, however, we do not allow the
-    # breakpoint to be pending since the library has already been loaded.
-    gdb_breakpoint $srcfile_lib:$bp_inc
-    gdb_breakpoint $srcfile:$bp_main
-
-    test_dlmopen
+	test_dlmopen
+    }
 }

base-commit: b0119424d19afcf80997ad5f3128d7ec68e1fafa
-- 
2.34.1