diff options
Diffstat (limited to 'tools/perf/util/probe-event.c')
| -rw-r--r-- | tools/perf/util/probe-event.c | 24 |
1 files changed, 21 insertions, 3 deletions
diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c index 3b4cf456165..b05d532a4e4 100644 --- a/tools/perf/util/probe-event.c +++ b/tools/perf/util/probe-event.c @@ -482,7 +482,7 @@ static void write_trace_kprobe_event(int fd, const char *buf) } static void get_new_event_name(char *buf, size_t len, const char *base, - struct strlist *namelist) + struct strlist *namelist, bool allow_suffix) { int i, ret; @@ -493,6 +493,12 @@ static void get_new_event_name(char *buf, size_t len, const char *base, if (!strlist__has_entry(namelist, buf)) return; + if (!allow_suffix) { + pr_warning("Error: event \"%s\" already exists. " + "(Use -f to force duplicates.)\n", base); + die("Can't add new event."); + } + /* Try to add suffix */ for (i = 1; i < MAX_EVENT_INDEX; i++) { ret = e_snprintf(buf, len, "%s_%d", base, i); @@ -505,13 +511,15 @@ static void get_new_event_name(char *buf, size_t len, const char *base, die("Too many events are on the same function."); } -void add_trace_kprobe_events(struct probe_point *probes, int nr_probes) +void add_trace_kprobe_events(struct probe_point *probes, int nr_probes, + bool force_add) { int i, j, fd; struct probe_point *pp; char buf[MAX_CMDLEN]; char event[64]; struct strlist *namelist; + bool allow_suffix; fd = open_kprobe_events(O_RDWR, O_APPEND); /* Get current event names */ @@ -524,9 +532,12 @@ void add_trace_kprobe_events(struct probe_point *probes, int nr_probes) if (!pp->group) pp->group = strdup(PERFPROBE_GROUP); DIE_IF(!pp->event || !pp->group); + /* If force_add is true, suffix search is allowed */ + allow_suffix = force_add; for (i = 0; i < pp->found; i++) { /* Get an unused new event name */ - get_new_event_name(event, 64, pp->event, namelist); + get_new_event_name(event, 64, pp->event, namelist, + allow_suffix); snprintf(buf, MAX_CMDLEN, "%c:%s/%s %s\n", pp->retprobe ? 'r' : 'p', pp->group, event, @@ -538,6 +549,13 @@ void add_trace_kprobe_events(struct probe_point *probes, int nr_probes) show_perf_probe_event(event, buf, pp); /* Add added event name to namelist */ strlist__add(namelist, event); + /* + * Probes after the first probe which comes from same + * user input are always allowed to add suffix, because + * there might be several addresses corresponding to + * one code line. + */ + allow_suffix = true; } } /* Show how to use the event. */ |