path: root/tools/perf/util/parse-events.c
diff options
authorLeo Yan <leo.yan@linaro.org>2020-01-17 13:52:51 +0800
committerArnaldo Carvalho de Melo <acme@redhat.com>2020-01-30 11:55:02 +0100
commit3220fb8d5e59d7a9b59d02965d4209aef7691e9f (patch)
treec70f9e38e60fcb95eb746f31a8627fff0409af5f /tools/perf/util/parse-events.c
parentperf parse: Refactor 'struct perf_evsel_config_term' (diff)
perf parse: Copy string to perf_evsel_config_term
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> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Ian Rogers <irogers@google.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: Mike Leach <mike.leach@linaro.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Suzuki Poulouse <suzuki.poulose@arm.com> Cc: linux-arm-kernel@lists.infradead.org Link: http://lore.kernel.org/lkml/20200117055251.24058-2-leo.yan@linaro.org [ Use zfree() in perf_evsel__free_config_terms ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> :# modified: tools/perf/util/evsel_config.h
Diffstat (limited to '')
1 files changed, 6 insertions, 1 deletions
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;