From: Leo Yan <leo.yan@linaro.org> To: Arnaldo Carvalho de Melo <acme@redhat.com>, Mathieu Poirier <mathieu.poirier@linaro.org>, Suzuki K Poulose <suzuki.poulose@arm.com>, Peter Zijlstra <peterz@infradead.org>, Ingo Molnar <mingo@redhat.com>, Mark Rutland <mark.rutland@arm.com>, Alexander Shishkin <alexander.shishkin@linux.intel.com>, Jiri Olsa <jolsa@kernel.org>, Namhyung Kim <namhyung@kernel.org>, Ian Rogers <irogers@google.com>, Andi Kleen <ak@linux.intel.com>, Adrian Hunter <adrian.hunter@intel.com>, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Mike Leach <mike.leach@linaro.org> Cc: Leo Yan <leo.yan@linaro.org> Subject: [PATCH v6 2/2] perf parse: Copy string to perf_evsel_config_term Date: Fri, 17 Jan 2020 13:52:51 +0800 [thread overview] Message-ID: <20200117055251.24058-2-leo.yan@linaro.org> (raw) In-Reply-To: <20200117055251.24058-1-leo.yan@linaro.org> perf with CoreSight fails to record trace data with command: perf record -e cs_etm/@tmc_etr0/u --per-thread ls failed to set sink "" on event cs_etm/@tmc_etr0/u with 21 (Is a directory)/perf/ This failure is root caused with the commit 1dc925568f01 ("perf parse: Add a deep delete for parse event terms"). The log shows, cs_etm fails to parse the sink attribution; cs_etm event relies on the event configuration to pass sink name, but the event specific configuration data cannot be passed properly with flow: get_config_terms() ADD_CONFIG_TERM(DRV_CFG, term->val.str); __t->val.str = term->val.str; `> __t->val.str is assigned to term->val.str; parse_events_terms__purge() parse_events_term__delete() zfree(&term->val.str); `> term->val.str is freed and assigned to NULL pointer; cs_etm_set_sink_attr() sink = __t->val.str; `> sink string has been freed. To fix this issue, in the function get_config_terms(), this patch changes to use strdup() for allocation a new duplicate string rather than directly assignment string pointer. This patch addes a new field 'free_str' in the data structure perf_evsel_config_term; 'free_str' is set to true when the union is used as a string pointer; thus it can tell perf_evsel__free_config_terms() to free the string. Fixes: 1dc925568f01 ("perf parse: Add a deep delete for parse event terms") Suggested-by: Jiri Olsa <jolsa@kernel.org> Signed-off-by: Leo Yan <leo.yan@linaro.org> Acked-by: Jiri Olsa <jolsa@kernel.org> --- tools/perf/util/evsel.c | 2 ++ tools/perf/util/evsel_config.h | 1 + tools/perf/util/parse-events.c | 7 ++++++- 3 files changed, 9 insertions(+), 1 deletion(-) diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index 549abd43816f..6fe9e28180e5 100644 --- a/tools/perf/util/evsel.c +++ b/tools/perf/util/evsel.c @@ -1265,6 +1265,8 @@ static void perf_evsel__free_config_terms(struct evsel *evsel) list_for_each_entry_safe(term, h, &evsel->config_terms, list) { list_del_init(&term->list); + if (term->free_str) + free(term->val.str); free(term); } } diff --git a/tools/perf/util/evsel_config.h b/tools/perf/util/evsel_config.h index b4a65201e4f7..e026ab67b008 100644 --- a/tools/perf/util/evsel_config.h +++ b/tools/perf/util/evsel_config.h @@ -32,6 +32,7 @@ enum evsel_term_type { struct perf_evsel_config_term { struct list_head list; enum evsel_term_type type; + bool free_str; union { u64 period; u64 freq; diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c index f59f3c8da473..c01ba6f8fdad 100644 --- a/tools/perf/util/parse-events.c +++ b/tools/perf/util/parse-events.c @@ -1240,7 +1240,12 @@ do { \ #define ADD_CONFIG_TERM_STR(__type, __val) \ do { \ ADD_CONFIG_TERM(__type); \ - __t->val.str = __val; \ + __t->val.str = strdup(__val); \ + if (!__t->val.str) { \ + zfree(&__t); \ + return -ENOMEM; \ + } \ + __t->free_str = true; \ } while (0) struct parse_events_term *term; -- 2.17.1
WARNING: multiple messages have this Message-ID (diff)
From: Leo Yan <leo.yan@linaro.org> To: Arnaldo Carvalho de Melo <acme@redhat.com>, Mathieu Poirier <mathieu.poirier@linaro.org>, Suzuki K Poulose <suzuki.poulose@arm.com>, Peter Zijlstra <peterz@infradead.org>, Ingo Molnar <mingo@redhat.com>, Mark Rutland <mark.rutland@arm.com>, Alexander Shishkin <alexander.shishkin@linux.intel.com>, Jiri Olsa <jolsa@kernel.org>, Namhyung Kim <namhyung@kernel.org>, Ian Rogers <irogers@google.com>, Andi Kleen <ak@linux.intel.com>, Adrian Hunter <adrian.hunter@intel.com>, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Mike Leach <mike.leach@linaro.org> Cc: Leo Yan <leo.yan@linaro.org> Subject: [PATCH v6 2/2] perf parse: Copy string to perf_evsel_config_term Date: Fri, 17 Jan 2020 13:52:51 +0800 [thread overview] Message-ID: <20200117055251.24058-2-leo.yan@linaro.org> (raw) In-Reply-To: <20200117055251.24058-1-leo.yan@linaro.org> perf with CoreSight fails to record trace data with command: perf record -e cs_etm/@tmc_etr0/u --per-thread ls failed to set sink "" on event cs_etm/@tmc_etr0/u with 21 (Is a directory)/perf/ This failure is root caused with the commit 1dc925568f01 ("perf parse: Add a deep delete for parse event terms"). The log shows, cs_etm fails to parse the sink attribution; cs_etm event relies on the event configuration to pass sink name, but the event specific configuration data cannot be passed properly with flow: get_config_terms() ADD_CONFIG_TERM(DRV_CFG, term->val.str); __t->val.str = term->val.str; `> __t->val.str is assigned to term->val.str; parse_events_terms__purge() parse_events_term__delete() zfree(&term->val.str); `> term->val.str is freed and assigned to NULL pointer; cs_etm_set_sink_attr() sink = __t->val.str; `> sink string has been freed. To fix this issue, in the function get_config_terms(), this patch changes to use strdup() for allocation a new duplicate string rather than directly assignment string pointer. This patch addes a new field 'free_str' in the data structure perf_evsel_config_term; 'free_str' is set to true when the union is used as a string pointer; thus it can tell perf_evsel__free_config_terms() to free the string. Fixes: 1dc925568f01 ("perf parse: Add a deep delete for parse event terms") Suggested-by: Jiri Olsa <jolsa@kernel.org> Signed-off-by: Leo Yan <leo.yan@linaro.org> Acked-by: Jiri Olsa <jolsa@kernel.org> --- tools/perf/util/evsel.c | 2 ++ tools/perf/util/evsel_config.h | 1 + tools/perf/util/parse-events.c | 7 ++++++- 3 files changed, 9 insertions(+), 1 deletion(-) diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index 549abd43816f..6fe9e28180e5 100644 --- a/tools/perf/util/evsel.c +++ b/tools/perf/util/evsel.c @@ -1265,6 +1265,8 @@ static void perf_evsel__free_config_terms(struct evsel *evsel) list_for_each_entry_safe(term, h, &evsel->config_terms, list) { list_del_init(&term->list); + if (term->free_str) + free(term->val.str); free(term); } } diff --git a/tools/perf/util/evsel_config.h b/tools/perf/util/evsel_config.h index b4a65201e4f7..e026ab67b008 100644 --- a/tools/perf/util/evsel_config.h +++ b/tools/perf/util/evsel_config.h @@ -32,6 +32,7 @@ enum evsel_term_type { struct perf_evsel_config_term { struct list_head list; enum evsel_term_type type; + bool free_str; union { u64 period; u64 freq; diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c index f59f3c8da473..c01ba6f8fdad 100644 --- a/tools/perf/util/parse-events.c +++ b/tools/perf/util/parse-events.c @@ -1240,7 +1240,12 @@ do { \ #define ADD_CONFIG_TERM_STR(__type, __val) \ do { \ ADD_CONFIG_TERM(__type); \ - __t->val.str = __val; \ + __t->val.str = strdup(__val); \ + if (!__t->val.str) { \ + zfree(&__t); \ + return -ENOMEM; \ + } \ + __t->free_str = true; \ } while (0) struct parse_events_term *term; -- 2.17.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2020-01-17 5:55 UTC|newest] Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-01-17 5:52 [PATCH v6 1/2] perf parse: Refactor struct perf_evsel_config_term Leo Yan 2020-01-17 5:52 ` Leo Yan 2020-01-17 5:52 ` Leo Yan [this message] 2020-01-17 5:52 ` [PATCH v6 2/2] perf parse: Copy string to perf_evsel_config_term Leo Yan 2020-01-17 13:34 ` Arnaldo Carvalho de Melo 2020-01-17 13:34 ` Arnaldo Carvalho de Melo 2020-01-17 15:36 ` Leo Yan 2020-01-17 15:36 ` Leo Yan 2020-02-05 15:45 ` [tip: perf/urgent] " tip-bot2 for Leo Yan 2020-01-17 13:36 ` [PATCH v6 1/2] perf parse: Refactor struct perf_evsel_config_term Arnaldo Carvalho de Melo 2020-01-17 13:36 ` Arnaldo Carvalho de Melo 2020-02-05 15:45 ` [tip: perf/urgent] perf parse: Refactor 'struct perf_evsel_config_term' tip-bot2 for Leo Yan
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