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Subject[PATCH 2/2] perf tools: Fix tracepoint id to string perf.data header table
Date
From: Arnaldo Carvalho de Melo <acme@redhat.com>

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>
---
tools/perf/builtin-record.c | 2 ++
tools/perf/util/parse-events.c | 29 -----------------------------
2 files changed, 2 insertions(+), 29 deletions(-)
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index df6064a..fcd29e8 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 1f4cfe5..bc2732e 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);
}
--
1.6.2.5


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