[RFA] bailing out of tests with multiple errors or timeouts

[Janis Johnson <janisjo@codesourcery.com>]

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Several gdb tests get multiple ERRORS and/or timeouts for some multilibs
of some embedded targets, with a few tests timing out a dozen times.  I
would like to modify these tests to look for the first expected ERROR or
timeout and then bail out with an indication that the remainder of the
test has been skipped.  I haven't found a standard way to do this; any
suggestions?  I've attached a couple of examples as a starting point for
discussion.

Janis Johnson
CodeSourcery / Mentor Graphics

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2011-05-04  Janis Johnson  <janisjo@codesourcery.com>

	* gdb.threads/manythreads.exp: Bail out after an error that
	indicates the test might have further errors.
	* gdb.threads/staticthreads.exp: Bail out after a timeout
	that indicates the test might have further timeouts.

Index: testsuite/gdb.threads/manythreads.exp
===================================================================
RCS file: /cvs/src/src/gdb/testsuite/gdb.threads/manythreads.exp,v
retrieving revision 1.22
diff -u -p -r1.22 manythreads.exp
--- testsuite/gdb.threads/manythreads.exp	19 Jan 2011 17:21:39 -0000	1.22
+++ testsuite/gdb.threads/manythreads.exp	4 May 2011 17:34:16 -0000
@@ -97,6 +97,11 @@ gdb_test_multiple $cmd $cmd {
 	    fail $cmd
 	}
     }
+    eof {
+	fail "$cmd (Process no longer exists)"
+	fail "Remainder of test"
+	return
+    }
 }
 
 gdb_test_no_output "thread name zardoz" "give a name to the thread"
Index: testsuite/gdb.threads/staticthreads.exp
===================================================================
RCS file: /cvs/src/src/gdb/testsuite/gdb.threads/staticthreads.exp,v
retrieving revision 1.13
diff -u -p -r1.13 staticthreads.exp
--- testsuite/gdb.threads/staticthreads.exp	1 Jan 2011 15:33:50 -0000	1.13
+++ testsuite/gdb.threads/staticthreads.exp	4 May 2011 17:34:16 -0000
@@ -54,6 +54,12 @@ gdb_test_multiple "continue" "$test" {
     -re "Program received signal .*$gdb_prompt " {
 	kfail gdb/1328 "$test"
     }
+    timeout {
+	# A timeout here often indicates more timeouts later in the test.
+	fail "$test (timeout)"
+	fail "Remainder of test"
+	return
+    }
 }