Merge branch 'for-upstream' of git://repo.or.cz/qemu/agraf
[qemu.git] / trace / default.c
1 /*
2 * Default implementation for backend initialization from commandline.
3 *
4 * Copyright (C) 2011 LluĂ­s Vilanova <vilanova@ac.upc.edu>
5 *
6 * This work is licensed under the terms of the GNU GPL, version 2. See
7 * the COPYING file in the top-level directory.
8 */
9
10 #include "trace/control.h"
11
12
13 void trace_print_events(FILE *stream, fprintf_function stream_printf)
14 {
15 fprintf(stderr, "warning: "
16 "cannot print the trace events with the current backend\n");
17 stream_printf(stream, "error: "
18 "operation not supported with the current backend\n");
19 }
20
21 bool trace_event_set_state(const char *name, bool state)
22 {
23 fprintf(stderr, "warning: "
24 "cannot set the state of a trace event with the current backend\n");
25 return false;
26 }
27
28 bool trace_backend_init(const char *events, const char *file)
29 {
30 if (events) {
31 fprintf(stderr, "error: -trace events=...: "
32 "option not supported by the selected tracing backend\n");
33 return false;
34 }
35 if (file) {
36 fprintf(stderr, "error: -trace file=...: "
37 "option not supported by the selected tracing backend\n");
38 return false;
39 }
40 return true;
41 }