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Date: Thu, 2 Jan 2020 23:13:26 +0800
From: Leo Yan <leo.yan@...aro.org>
To: Arnaldo Carvalho de Melo <acme@...hat.com>,
Peter Zijlstra <peterz@...radead.org>,
Ingo Molnar <mingo@...hat.com>,
Mark Rutland <mark.rutland@....com>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Jiri Olsa <jolsa@...nel.org>,
Namhyung Kim <namhyung@...nel.org>,
Ian Rogers <irogers@...gle.com>,
Adrian Hunter <adrian.hunter@...el.com>,
Andi Kleen <ak@...ux.intel.com>, linux-kernel@...r.kernel.org
Cc: Leo Yan <leo.yan@...aro.org>
Subject: [PATCH] perf parse: Copy string to perf_evsel_config_term
perf with CoreSight fails to record trace data with command:
perf record -e cs_etm/@..._etr0/u --per-thread ls
failed to set sink "" on event cs_etm/@..._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, drv_cfg, term->val.str);
__t->val.drv_cfg = term->val.str;
`> __t->val.drv_cfg 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.drv_cfg;
`> sink string has been freed.
To fix this issue, in the function get_config_terms(), this patch
changes from directly assignment pointer value for the strings to
use strdup() for allocation a new duplicate string for the cases:
perf_evsel_config_term::val.callgraph
perf_evsel_config_term::val.branch
perf_evsel_config_term::val.drv_cfg.
Fixes: 1dc925568f01 ("perf parse: Add a deep delete for parse event terms")
Signed-off-by: Leo Yan <leo.yan@...aro.org>
---
tools/perf/util/parse-events.c | 49 ++++++++++++++++++++--------------
1 file changed, 29 insertions(+), 20 deletions(-)
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index ed7c008b9c8b..5972acdd40d6 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -1220,7 +1220,6 @@ static int get_config_terms(struct list_head *head_config,
struct list_head *head_terms __maybe_unused)
{
#define ADD_CONFIG_TERM(__type, __name, __val) \
-do { \
struct perf_evsel_config_term *__t; \
\
__t = zalloc(sizeof(*__t)); \
@@ -1229,9 +1228,19 @@ do { \
\
INIT_LIST_HEAD(&__t->list); \
__t->type = PERF_EVSEL__CONFIG_TERM_ ## __type; \
- __t->val.__name = __val; \
__t->weak = term->weak; \
- list_add_tail(&__t->list, head_terms); \
+ list_add_tail(&__t->list, head_terms)
+
+#define ADD_CONFIG_TERM_VAL(__type, __name, __val) \
+do { \
+ ADD_CONFIG_TERM(__type, __name, __val); \
+ __t->val.__name = __val; \
+} while (0)
+
+#define ADD_CONFIG_TERM_STR(__type, __name, __val) \
+do { \
+ ADD_CONFIG_TERM(__type, __name, __val); \
+ __t->val.__name = strdup(__val); \
} while (0)
struct parse_events_term *term;
@@ -1239,53 +1248,53 @@ do { \
list_for_each_entry(term, head_config, list) {
switch (term->type_term) {
case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
- ADD_CONFIG_TERM(PERIOD, period, term->val.num);
+ ADD_CONFIG_TERM_VAL(PERIOD, period, term->val.num);
break;
case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
- ADD_CONFIG_TERM(FREQ, freq, term->val.num);
+ ADD_CONFIG_TERM_VAL(FREQ, freq, term->val.num);
break;
case PARSE_EVENTS__TERM_TYPE_TIME:
- ADD_CONFIG_TERM(TIME, time, term->val.num);
+ ADD_CONFIG_TERM_VAL(TIME, time, term->val.num);
break;
case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
- ADD_CONFIG_TERM(CALLGRAPH, callgraph, term->val.str);
+ ADD_CONFIG_TERM_STR(CALLGRAPH, callgraph, term->val.str);
break;
case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
- ADD_CONFIG_TERM(BRANCH, branch, term->val.str);
+ ADD_CONFIG_TERM_STR(BRANCH, branch, term->val.str);
break;
case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
- ADD_CONFIG_TERM(STACK_USER, stack_user, term->val.num);
+ ADD_CONFIG_TERM_VAL(STACK_USER, stack_user, term->val.num);
break;
case PARSE_EVENTS__TERM_TYPE_INHERIT:
- ADD_CONFIG_TERM(INHERIT, inherit, term->val.num ? 1 : 0);
+ ADD_CONFIG_TERM_VAL(INHERIT, inherit, term->val.num ? 1 : 0);
break;
case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
- ADD_CONFIG_TERM(INHERIT, inherit, term->val.num ? 0 : 1);
+ ADD_CONFIG_TERM_VAL(INHERIT, inherit, term->val.num ? 0 : 1);
break;
case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
- ADD_CONFIG_TERM(MAX_STACK, max_stack, term->val.num);
+ ADD_CONFIG_TERM_VAL(MAX_STACK, max_stack, term->val.num);
break;
case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS:
- ADD_CONFIG_TERM(MAX_EVENTS, max_events, term->val.num);
+ ADD_CONFIG_TERM_VAL(MAX_EVENTS, max_events, term->val.num);
break;
case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
- ADD_CONFIG_TERM(OVERWRITE, overwrite, term->val.num ? 1 : 0);
+ ADD_CONFIG_TERM_VAL(OVERWRITE, overwrite, term->val.num ? 1 : 0);
break;
case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
- ADD_CONFIG_TERM(OVERWRITE, overwrite, term->val.num ? 0 : 1);
+ ADD_CONFIG_TERM_VAL(OVERWRITE, overwrite, term->val.num ? 0 : 1);
break;
case PARSE_EVENTS__TERM_TYPE_DRV_CFG:
- ADD_CONFIG_TERM(DRV_CFG, drv_cfg, term->val.str);
+ ADD_CONFIG_TERM_STR(DRV_CFG, drv_cfg, term->val.str);
break;
case PARSE_EVENTS__TERM_TYPE_PERCORE:
- ADD_CONFIG_TERM(PERCORE, percore,
+ ADD_CONFIG_TERM_VAL(PERCORE, percore,
term->val.num ? true : false);
break;
case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT:
- ADD_CONFIG_TERM(AUX_OUTPUT, aux_output, term->val.num ? 1 : 0);
+ ADD_CONFIG_TERM_VAL(AUX_OUTPUT, aux_output, term->val.num ? 1 : 0);
break;
case PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE:
- ADD_CONFIG_TERM(AUX_SAMPLE_SIZE, aux_sample_size, term->val.num);
+ ADD_CONFIG_TERM_VAL(AUX_SAMPLE_SIZE, aux_sample_size, term->val.num);
break;
default:
break;
@@ -1322,7 +1331,7 @@ static int get_config_chgs(struct perf_pmu *pmu, struct list_head *head_config,
}
if (bits)
- ADD_CONFIG_TERM(CFG_CHG, cfg_chg, bits);
+ ADD_CONFIG_TERM_VAL(CFG_CHG, cfg_chg, bits);
#undef ADD_CONFIG_TERM
return 0;
--
2.17.1
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