Make gdb.base/a2-run.exp use $inferior_spawn_id and gdb_test_stdio

This one is a little more complicated than the other patches in this
series, because of the exit status wrapper handling, requiring a
little state machine.

gdb/testsuite/ChangeLog:
2015-07-29  Pedro Alves  <palves@redhat.com>

	* gdb.base/a2-run.exp (saw_usage, saw_exit_wrapper)
	(saw_spurious_output): Expect inferior output from
	$inferior_spawn_id.  Use gdb_test_stdio.

2 files changed, 77 insertions, 20 deletions

diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index 0f0ddc9..d952882 100644
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,5 +1,11 @@
 2015-07-29  Pedro Alves  <palves@redhat.com>
 
+	* gdb.base/a2-run.exp (saw_usage, saw_exit_wrapper)
+	(saw_spurious_output): Expect inferior output from
+	$inferior_spawn_id.  Use gdb_test_stdio.
+
+2015-07-29  Pedro Alves  <palves@redhat.com>
+
 	* gdb.base/dprintf.exp: Use standard_testfile.  Change
 	prepare_for_testing call.
 	(srcfile): Don't set.
diff --git a/gdb/testsuite/gdb.base/a2-run.exp b/gdb/testsuite/gdb.base/a2-run.exp
index 3e4bfdf..dd6af25 100644
--- a/gdb/testsuite/gdb.base/a2-run.exp
+++ b/gdb/testsuite/gdb.base/a2-run.exp
@@ -33,25 +33,77 @@ if { [prepare_for_testing ${testfile}.exp $testfile $srcfile] } {
 # Run with no arguments.
 gdb_run_cmd
 
+set saw_usage 0
+set saw_exit_wrapper 0
+set saw_spurious_output 0
+
 set test "run \"$testfile\" with no args"
 
-gdb_test_multiple "" $test {
-    -re ".*usage:  factorial <number>.*$inferior_exited_re with code 01.\r\n$gdb_prompt $" {
-	pass $test
-	pass "no spurious messages at program exit"
+set inferior_spawn_list "$inferior_spawn_id"
+set gdb_spawn_list "$gdb_spawn_id"
+
+set res [gdb_test_multiple "" $test {
+    -i inferior_spawn_list
+    -re "usage:  factorial <number>" {
+	set saw_usage 1
+	exp_continue
+    }
+    -re "EXIT code 1" {
+	set saw_exit_wrapper 1
+	set inferior_spawn_list ""
+	exp_continue
+    }
+    eof {
+	if {$inferior_spawn_id != $gdb_spawn_id} {
+	    # In this case we may see the server/inferior exit before
+	    # GDB's program exit output.  Remove from spawn list and
+	    # continue waiting.
+	    set inferior_spawn_list ""
+	    exp_continue
+	}
+	# GDB crash.
+	fail "$test (eof)"
+    }
+
+    -i gdb_spawn_list
+
+    -re "$inferior_exited_re with code 01.\r\n$gdb_prompt $" {
     }
-    -re ".*usage:  factorial <number>.*$inferior_exited_re with code 01.*$gdb_prompt $" {
-	pass $test
-	fail "no spurious messages at program exit"
+    -re "$inferior_exited_re with code 01.*$gdb_prompt $" {
+	set saw_spurious_output 1
     }
-    -re ".*usage:  factorial <number>.* EXIT code 1.*$inferior_exited_re normally.\r\n$gdb_prompt $" {
-	pass "$test (exit wrapper)"
-	pass "no spurious messages at program exit"
+
+    -re "$inferior_exited_re normally.\r\n$gdb_prompt $" {
+	# This is only considered a pass if we see the exit wrapper
+	# status.  Since if $inferior_spawn_id != $gdb_spawn_id the
+	# order we pick output from each spawn id isn't defined,
+	# remove gdb_spawn_id from the match lists and go back to
+	# waiting.  If we had already seen the status wrapper exit,
+	# gdb_test_multiple/expect has no spawn ids left, and thus
+	# returns.
+	set gdb_spawn_list ""
+	exp_continue
     }
-    -re ".*usage:  factorial <number>.* EXIT code 1.*$inferior_exited_re normally.*$gdb_prompt $" {
-	pass "$test (exit wrapper)"
-	fail "no spurious messages at program exit"
+    -re "$inferior_exited_re normally.*$gdb_prompt $" {
+	set saw_spurious_output 1
+
+	# See above.
+	set gdb_spawn_list ""
+	exp_continue
     }
+}]
+
+if {$res == 0} {
+    gdb_assert ${saw_usage} $test
+
+    if {$saw_exit_wrapper} {
+	set msg "$test (exit wrapper)"
+    } else {
+	set msg $test
+    }
+
+    gdb_assert !$saw_spurious_output "no spurious messages at program exit"
+
 }
 
 # The remaining tests don't work for targets can't take arguments...
@@ -64,20 +116,20 @@ if [target_info exists noargs] then {
 # Now run with some arguments
 setup_xfail "arm-*-coff"
 gdb_run_cmd 5
-gdb_test "" "120.*" "run \"$testfile\" with arg"
+gdb_test_stdio "" "120" "" "run \"$testfile\" with arg"
 
 # Run again with same arguments.
 gdb_run_cmd
 
 setup_xfail "arm-*-coff"
-gdb_test "" "120.*" "run \"$testfile\" again with same args"
+gdb_test_stdio "" "120" "" "run \"$testfile\" again with same args"
 
 # Use "set args" command to specify no arguments as default and run again.
 gdb_test_no_output "set args"
 
 gdb_run_cmd
 
-gdb_test "" "usage:  factorial <number>.*" "run after setting args to nil"
+gdb_test_stdio "" "usage:  factorial <number>" "" "run after setting args to nil"
 
 # Use "set args" command to specify an argument and run again.
 gdb_test_no_output "set args 6"
@@ -85,12 +137,11 @@ gdb_test_no_output "set args 6"
 gdb_run_cmd
 
 setup_xfail "arm-*-coff"
-gdb_test "" "720.*" "run \"$testfile\" again after setting args"
+gdb_test_stdio "" "720" "" "run \"$testfile\" again after setting args"
 
 # GOAL: Test that shell is being used with "run".  For remote debugging
 # targets, there is no guarantee that a "shell" (whatever that is) is used.
 if ![is_remote target] then {
-    gdb_test "run `echo 8`" \
-	"Starting program.*40320.*" \
-	"run \"$testfile\" with shell"
+    gdb_test_stdio "run `echo 8`" \
+	"40320" "" "run \"$testfile\" with shell"
 }