| Message ID | 1351251994-12846-1-git-send-email-kraxel@redhat.com |
|---|---|
| State | New |
| Headers | show |
On Fri, Oct 26, 2012 at 01:46:34PM +0200, Gerd Hoffmann wrote: > 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 <kraxel@redhat.com> > --- > trace/control.c | 9 ++++++++- > 1 files changed, 8 insertions(+), 1 deletions(-) Sorry for the late reply. Looks good I will send a patch to update the documentation. Applied to the tracing tree: http://github.com/stefanha/qemu/commits/tracing Stefan
diff --git a/trace/control.c b/trace/control.c index 22d5863..be05efb 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);
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 <kraxel@redhat.com> --- trace/control.c | 9 ++++++++- 1 files changed, 8 insertions(+), 1 deletions(-)