From e9527dd399ed213ec6eb2c0ea54be663a73032b0 Mon Sep 17 00:00:00 2001 From: Paolo Bonzini Date: Thu, 7 Jan 2016 16:55:27 +0300 Subject: trace: add "-trace help" Print a list of trace points Signed-off-by: Paolo Bonzini Signed-off-by: Denis V. Lunev Acked-by: Christian Borntraeger Message-id: 1452174932-28657-7-git-send-email-den@openvz.org Signed-off-by: Stefan Hajnoczi --- trace/control.c | 21 ++++++++++++++++++++- trace/control.h | 7 +++++++ 2 files changed, 27 insertions(+), 1 deletion(-) (limited to 'trace') 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 @@ -181,6 +181,13 @@ 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, -- cgit v1.2.3