perf tools: Fix tracepoint id to string perf.data header table

It was broken by f006d25 that passed just the event name, not the complete
sys:event that it expected to open the /sys/.../sys/sys:event/id file to get
the id.

Fix it by moving it to after parse_events in cmd_record, as at that point
we can just traverse the evsel_list and use evsel->attr.config +
event_name(evsel) instead of re-opening the /id file.

Reported-by: Franck Bui-Huu <vagabon.xyz@gmail.com>
Cc: Franck Bui-Huu <vagabon.xyz@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Han Pingtian <phan@redhat.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <20110117202801.GG2085@ghostprotocols.net>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

2 files changed, 2 insertions, 29 deletions

diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index df6064ad9bf2..fcd29e8af29f 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -936,6 +936,8 @@ int cmd_record(int argc, const char **argv, const char *prefix __used)
         list_for_each_entry(pos, &evsel_list, node) {
                 if (perf_evsel__alloc_fd(pos, cpus->nr, threads->nr) < 0)
                         goto out_free_fd;
+                if (perf_header__push_event(pos->attr.config, event_name(pos)))
+                        goto out_free_fd;
         }
         event_array = malloc((sizeof(struct pollfd) * MAX_NR_CPUS *
                               MAX_COUNTERS * threads->nr));
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index 1f4cfe5d32fc..bc2732ee23eb 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -490,32 +490,6 @@ parse_multiple_tracepoint_event(char *sys_name, const char *evt_exp,
         return EVT_HANDLED_ALL;
 }
 
-static int store_event_type(const char *orgname)
-{
-        char filename[PATH_MAX], *c;
-        FILE *file;
-        int id, n;
-
-        sprintf(filename, "%s/", debugfs_path);
-        strncat(filename, orgname, strlen(orgname));
-        strcat(filename, "/id");
-
-        c = strchr(filename, ':');
-        if (c)
-                *c = '/';
-
-        file = fopen(filename, "r");
-        if (!file)
-                return 0;
-        n = fscanf(file, "%i", &id);
-        fclose(file);
-        if (n < 1) {
-                pr_err("cannot store event ID\n");
-                return -EINVAL;
-        }
-        return perf_header__push_event(id, orgname);
-}
-
 static enum event_result parse_tracepoint_event(const char **strp,
                                     struct perf_event_attr *attr)
 {
@@ -559,9 +533,6 @@ static enum event_result parse_tracepoint_event(const char **strp,
                 return parse_multiple_tracepoint_event(sys_name, evt_name,
                                                        flags);
         } else {
-                if (store_event_type(evt_name) < 0)
-                        return EVT_FAILED;
-
                 return parse_single_tracepoint_event(sys_name, evt_name,
                                                      evt_length, attr, strp);
         }