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author | Mark Wu <wudxw@linux.vnet.ibm.com> | 2011-10-31 11:29:04 +0800 |
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committer | Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> | 2011-11-01 14:12:15 +0000 |
commit | 454e202d52a517c631cb750ba65ff8079c08b301 (patch) | |
tree | dfa1b8ddc5ac554d14dc5fb24188b60a45eae288 /trace/simple.c | |
parent | ff74c5a9a91c6dbf1017195462aa4176f7381240 (diff) | |
download | qemu-454e202d52a517c631cb750ba65ff8079c08b301.zip qemu-454e202d52a517c631cb750ba65ff8079c08b301.tar.gz qemu-454e202d52a517c631cb750ba65ff8079c08b301.tar.bz2 |
trace: Add wildcard trace event support
A basic wildcard matching is supported in both the monitor command
"trace-event" and the events list file. That means you can enable/disable
the events having a common prefix in a batch. For example, virtio-blk trace
events could be enabled using:
trace-event virtio_blk_* on
Signed-off-by: Mark Wu <wudxw@linux.vnet.ibm.com>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Diffstat (limited to 'trace/simple.c')
-rw-r--r-- | trace/simple.c | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/trace/simple.c b/trace/simple.c index b639dda..6339152 100644 --- a/trace/simple.c +++ b/trace/simple.c @@ -324,14 +324,29 @@ void trace_print_events(FILE *stream, fprintf_function stream_printf) bool trace_event_set_state(const char *name, bool state) { unsigned int i; - + unsigned int len; + bool wildcard = false; + bool matched = false; + + len = strlen(name); + if (len > 0 && name[len - 1] == '*') { + wildcard = true; + len -= 1; + } for (i = 0; i < NR_TRACE_EVENTS; i++) { + if (wildcard) { + if (!strncmp(trace_list[i].tp_name, name, len)) { + trace_list[i].state = state; + matched = true; + } + continue; + } if (!strcmp(trace_list[i].tp_name, name)) { trace_list[i].state = state; return true; } } - return false; + return matched; } /* Helper function to create a thread with signals blocked. Use glib's |