diff options
| author | Paolo Bonzini <pbonzini@redhat.com> | 2016-01-07 16:55:26 +0300 |
|---|---|---|
| committer | Stefan Hajnoczi <stefanha@redhat.com> | 2016-02-03 09:19:09 +0000 |
| commit | 10578a257d94fb59449d0b0e441990c45a036ccc (patch) | |
| tree | 5fc5b4d0935e70c3c2c784bc7dec0694e12e0b23 /trace/control.h | |
| parent | f246b86672118e4f0d0782f4c240d3666aa36710 (diff) | |
trace: add "-trace enable=..."
Allow enabling events without going through a file, for example:
qemu-system-x86_64 -trace bdrv_aio_writev -trace bdrv_aio_readv
or with globbing too:
qemu-system-x86_64 -trace 'bdrv_aio_*'
if an appropriate backend is enabled (simple, stderr, ftrace).
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Denis V. Lunev <den@openvz.org>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Message-id: 1452174932-28657-6-git-send-email-den@openvz.org
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'trace/control.h')
| -rw-r--r-- | trace/control.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/trace/control.h b/trace/control.h index d50f3996c7..d5081ce169 100644 --- a/trace/control.h +++ b/trace/control.h @@ -181,6 +181,15 @@ void trace_init_events(const char *file); */ void trace_init_file(const char *file); +/** + * trace_enable_events: + * @line_buf: A string with a glob pattern of events to be enabled or, + * if the string starts with '-', disabled. + * + * Enable or disable matching events. + */ +void trace_enable_events(const char *line_buf); + #include "trace/control-internal.h" |