2010-03-25 Stan Shebs <stan@codesourcery.com>

2010-03-25  Stan Shebs  <stan@codesourcery.com>

	* tracepoint.h (trace_stop_reason): Add tracepoint_error.
	(struct trace_status): New field error_desc.
	* tracepoint.c (stop_reason_names): Add terror.
	(current_trace_status): Ensure non-NULL error description.
	(trace_status_command): Add error report.
	(trace_status_mi): Ditto.
	(trace_save): Add special case for error description.
	(parse_trace_status): Add case for errors.

	* gdb.texinfo (Tracepoint Packets): Document trace error status.

	* gdb.trace/tfile.c: Generate an additional trace file, improve
	portability.
	* gdb.trace/tfile.exp: Test trace file with an error stop, delete
	files in a better way.