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authorPaolo Bonzini <pbonzini@redhat.com>2016-01-07 16:55:27 +0300
committerStefan Hajnoczi <stefanha@redhat.com>2016-02-03 09:19:09 +0000
commite9527dd399ed213ec6eb2c0ea54be663a73032b0 (patch)
tree82c51106e2f983f1d038ec499a0236be42c71e4e /trace
parent10578a257d94fb59449d0b0e441990c45a036ccc (diff)
downloadqemu-arm-e9527dd399ed213ec6eb2c0ea54be663a73032b0.tar.gz
trace: add "-trace help"
Print a list of trace points 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: 1452174932-28657-7-git-send-email-den@openvz.org Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'trace')
-rw-r--r--trace/control.c21
-rw-r--r--trace/control.h7
2 files changed, 27 insertions, 1 deletions
diff --git a/trace/control.c b/trace/control.c
index af92705bb4..bef7884ee1 100644
--- a/trace/control.c
+++ b/trace/control.c
@@ -88,7 +88,16 @@ TraceEvent *trace_event_pattern(const char *pat, TraceEvent *ev)
return NULL;
}
-void trace_enable_events(const char *line_buf)
+void trace_list_events(void)
+{
+ int i;
+ for (i = 0; i < trace_event_count(); i++) {
+ TraceEvent *res = trace_event_id(i);
+ fprintf(stderr, "%s\n", trace_event_get_name(res));
+ }
+}
+
+static void do_trace_enable_events(const char *line_buf)
{
const bool enable = ('-' != line_buf[0]);
const char *line_ptr = enable ? line_buf : line_buf + 1;
@@ -114,6 +123,16 @@ void trace_enable_events(const char *line_buf)
}
}
+void trace_enable_events(const char *line_buf)
+{
+ if (is_help_option(line_buf)) {
+ trace_list_events();
+ exit(0);
+ } else {
+ do_trace_enable_events(line_buf);
+ }
+}
+
void trace_init_events(const char *fname)
{
Location loc;
diff --git a/trace/control.h b/trace/control.h
index d5081ce169..d5bc86e5f1 100644
--- a/trace/control.h
+++ b/trace/control.h
@@ -182,6 +182,13 @@ void trace_init_events(const char *file);
void trace_init_file(const char *file);
/**
+ * trace_list_events:
+ *
+ * List all available events.
+ */
+void trace_list_events(void);
+
+/**
* trace_enable_events:
* @line_buf: A string with a glob pattern of events to be enabled or,
* if the string starts with '-', disabled.