Messages in this thread | | | Date | Thu, 17 Sep 2020 13:27:48 -0300 | From | Arnaldo Carvalho de Melo <> | Subject | Re: [PATCH v2 2/2] perf parse-event: Fix cpu map leaks |
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Em Thu, Sep 17, 2020 at 03:02:19PM +0900, Namhyung Kim escreveu: > Like evlist cpu map, evsel's cpu map should have a proper refcount. > As it's created with a refcount, we don't need to get an extra count. > Thanks to Arnaldo for the simpler suggestion. > > This fixes the following ASAN report:
This one should come first, and the patch summary is:
"perf parse-events Fix cpu map refcounting"
Then the next patch fixes the refcoutnt leak on the error path.
I'm fixing this up,
Thanks,
- Arnaldo
> Direct leak of 840 byte(s) in 70 object(s) allocated from: > #0 0x7fe36703f628 in malloc (/lib/x86_64-linux-gnu/libasan.so.5+0x107628) > #1 0x559fbbf611ca in cpu_map__trim_new /home/namhyung/project/linux/tools/lib/perf/cpumap.c:79 > #2 0x559fbbf6229c in perf_cpu_map__new /home/namhyung/project/linux/tools/lib/perf/cpumap.c:237 > #3 0x559fbbcc6c6d in __add_event util/parse-events.c:357 > #4 0x559fbbcc6c6d in add_event_tool util/parse-events.c:408 > #5 0x559fbbcc6c6d in parse_events_add_tool util/parse-events.c:1414 > #6 0x559fbbd8474d in parse_events_parse util/parse-events.y:439 > #7 0x559fbbcc95da in parse_events__scanner util/parse-events.c:2096 > #8 0x559fbbcc95da in __parse_events util/parse-events.c:2141 > #9 0x559fbbc2788b in check_parse_id tests/pmu-events.c:406 > #10 0x559fbbc2788b in check_parse_id tests/pmu-events.c:393 > #11 0x559fbbc2788b in check_parse_fake tests/pmu-events.c:436 > #12 0x559fbbc2788b in metric_parse_fake tests/pmu-events.c:553 > #13 0x559fbbc27e2d in test_parsing_fake tests/pmu-events.c:599 > #14 0x559fbbc27e2d in test_parsing_fake tests/pmu-events.c:574 > #15 0x559fbbc0109b in run_test tests/builtin-test.c:410 > #16 0x559fbbc0109b in test_and_print tests/builtin-test.c:440 > #17 0x559fbbc03e69 in __cmd_test tests/builtin-test.c:695 > #18 0x559fbbc03e69 in cmd_test tests/builtin-test.c:807 > #19 0x559fbbc691f4 in run_builtin /home/namhyung/project/linux/tools/perf/perf.c:312 > #20 0x559fbbb071a8 in handle_internal_command /home/namhyung/project/linux/tools/perf/perf.c:364 > #21 0x559fbbb071a8 in run_argv /home/namhyung/project/linux/tools/perf/perf.c:408 > #22 0x559fbbb071a8 in main /home/namhyung/project/linux/tools/perf/perf.c:538 > #23 0x7fe366b68cc9 in __libc_start_main ../csu/libc-start.c:308 > > And I've failed which commit introduced this bug as the code was > heavily changed since then. ;-/ > > Acked-by: Jiri Olsa <jolsa@redhat.com> > Signed-off-by: Namhyung Kim <namhyung@kernel.org> > --- > tools/perf/util/parse-events.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c > index 176a51698a64..fbe0d3143353 100644 > --- a/tools/perf/util/parse-events.c > +++ b/tools/perf/util/parse-events.c > @@ -353,7 +353,7 @@ __add_event(struct list_head *list, int *idx, > const char *cpu_list) > { > struct evsel *evsel; > - struct perf_cpu_map *cpus = pmu ? pmu->cpus : > + struct perf_cpu_map *cpus = pmu ? perf_cpu_map__get(pmu->cpus) : > cpu_list ? perf_cpu_map__new(cpu_list) : NULL; > > if (init_attr) > @@ -366,7 +366,7 @@ __add_event(struct list_head *list, int *idx, > } > > (*idx)++; > - evsel->core.cpus = perf_cpu_map__get(cpus); > + evsel->core.cpus = cpus; > evsel->core.own_cpus = perf_cpu_map__get(cpus); > evsel->core.system_wide = pmu ? pmu->is_uncore : false; > evsel->auto_merge_stats = auto_merge_stats; > -- > 2.28.0.618.gf4bc123cb7-goog >
--
- Arnaldo
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