From ddde8acc989d9e59b37605d438d5cb6b5ce8fbae Mon Sep 17 00:00:00 2001 From: Gerd Hoffmann Date: Fri, 26 Oct 2012 13:46:34 +0200 Subject: trace: allow disabling events in events file Disable trace events prefixed with a '-'. Useful to enable a group of tracepoints with exceptions, like this: usb_xhci_port_* -usb_xhci_port_read which will enable all xhci port tracepoints except reads. Signed-off-by: Gerd Hoffmann Signed-off-by: Stefan Hajnoczi --- trace/control.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) (limited to 'trace') diff --git a/trace/control.c b/trace/control.c index 22d5863eeb..be05efb99b 100644 --- a/trace/control.c +++ b/trace/control.c @@ -12,6 +12,8 @@ void trace_backend_init_events(const char *fname) { + int ret; + if (fname == NULL) { return; } @@ -30,7 +32,12 @@ void trace_backend_init_events(const char *fname) if ('#' == line_buf[0]) { /* skip commented lines */ continue; } - if (!trace_event_set_state(line_buf, true)) { + if ('-' == line_buf[0]) { + ret = trace_event_set_state(line_buf+1, false); + } else { + ret = trace_event_set_state(line_buf, true); + } + if (!ret) { fprintf(stderr, "error: trace event '%s' does not exist\n", line_buf); exit(1); -- cgit v1.2.1