From 831394bdd9dd3ac1661336505c7cbdfd786d8cd4 Mon Sep 17 00:00:00 2001 From: Namhyung Kim Date: Thu, 6 Sep 2012 11:10:46 +0900 Subject: [PATCH] perf header: Prepare tracepoint events regardless of name Current perf_evlist__set_tracepoint_names is a misnomer because it finds and sets correspoding event_format in addition to the name. So skipping it when a event has set name already caused a trouble. Rename it and set name only a event doesn't have one. Reported-by: David Ahern Signed-off-by: Namhyung Kim Cc: David Ahern Cc: Ingo Molnar Cc: Paul Mackerras Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/1346897446-16569-2-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/header.c | 36 ++++++++++++++++++++++-------------- 1 file changed, 22 insertions(+), 14 deletions(-) diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c index 8b0b873..d07bc13 100644 --- a/tools/perf/util/header.c +++ b/tools/perf/util/header.c @@ -2295,33 +2295,39 @@ static int read_attr(int fd, struct perf_header *ph, return ret <= 0 ? -1 : 0; } -static int perf_evsel__set_tracepoint_name(struct perf_evsel *evsel, - struct pevent *pevent) +static int perf_evsel__prepare_tracepoint_event(struct perf_evsel *evsel, + struct pevent *pevent) { - struct event_format *event = pevent_find_event(pevent, - evsel->attr.config); + struct event_format *event; char bf[128]; + /* already prepared */ + if (evsel->tp_format) + return 0; + + event = pevent_find_event(pevent, evsel->attr.config); if (event == NULL) return -1; - snprintf(bf, sizeof(bf), "%s:%s", event->system, event->name); - evsel->name = strdup(bf); - if (evsel->name == NULL) - return -1; + if (!evsel->name) { + snprintf(bf, sizeof(bf), "%s:%s", event->system, event->name); + evsel->name = strdup(bf); + if (evsel->name == NULL) + return -1; + } evsel->tp_format = event; return 0; } -static int perf_evlist__set_tracepoint_names(struct perf_evlist *evlist, - struct pevent *pevent) +static int perf_evlist__prepare_tracepoint_events(struct perf_evlist *evlist, + struct pevent *pevent) { struct perf_evsel *pos; list_for_each_entry(pos, &evlist->entries, node) { - if (pos->attr.type == PERF_TYPE_TRACEPOINT && !pos->name && - perf_evsel__set_tracepoint_name(pos, pevent)) + if (pos->attr.type == PERF_TYPE_TRACEPOINT && + perf_evsel__prepare_tracepoint_event(pos, pevent)) return -1; } @@ -2409,7 +2415,8 @@ int perf_session__read_header(struct perf_session *session, int fd) lseek(fd, header->data_offset, SEEK_SET); - if (perf_evlist__set_tracepoint_names(session->evlist, session->pevent)) + if (perf_evlist__prepare_tracepoint_events(session->evlist, + session->pevent)) goto out_delete_evlist; header->frozen = 1; @@ -2643,7 +2650,8 @@ int perf_event__process_tracing_data(union perf_event *event, if (size_read + padding != size) die("tracing data size mismatch"); - perf_evlist__set_tracepoint_names(session->evlist, session->pevent); + perf_evlist__prepare_tracepoint_events(session->evlist, + session->pevent); return size_read + padding; } -- 2.7.4