perf parse-events: Make term's config const

This avoids casts in tests. Use zfree in a few places to avoid
warnings about a freeing a const pointer.

Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: Huacai Chen <chenhuacai@kernel.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: K Prateek Nayak <kprateek.nayak@amd.com>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Ming Wang <wangming01@loongson.cn>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Sean Christopherson <seanjc@google.com>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: Wei Li <liwei391@huawei.com>
Cc: Will Deacon <will@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org
Link: https://lore.kernel.org/r/20230825024002.801955-4-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

Author: captain5050

tools/perf/tests/pmu.c

@@ -28,55 +28,55 @@ static struct test_format {
 /* Simulated users input. */
 static struct parse_events_term test_terms[] = {
 	{
-		.config    = (char *) "krava01",
+		.config    = "krava01",
 		.val.num   = 15,
 		.type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
 		.type_term = PARSE_EVENTS__TERM_TYPE_USER,
 	},
 	{
-		.config    = (char *) "krava02",
+		.config    = "krava02",
 		.val.num   = 170,
 		.type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
 		.type_term = PARSE_EVENTS__TERM_TYPE_USER,
 	},
 	{
-		.config    = (char *) "krava03",
+		.config    = "krava03",
 		.val.num   = 1,
 		.type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
 		.type_term = PARSE_EVENTS__TERM_TYPE_USER,
 	},
 	{
-		.config    = (char *) "krava11",
+		.config    = "krava11",
 		.val.num   = 27,
 		.type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
 		.type_term = PARSE_EVENTS__TERM_TYPE_USER,
 	},
 	{
-		.config    = (char *) "krava12",
+		.config    = "krava12",
 		.val.num   = 1,
 		.type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
 		.type_term = PARSE_EVENTS__TERM_TYPE_USER,
 	},
 	{
-		.config    = (char *) "krava13",
+		.config    = "krava13",
 		.val.num   = 2,
 		.type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
 		.type_term = PARSE_EVENTS__TERM_TYPE_USER,
 	},
 	{
-		.config    = (char *) "krava21",
+		.config    = "krava21",
 		.val.num   = 119,
 		.type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
 		.type_term = PARSE_EVENTS__TERM_TYPE_USER,
 	},
 	{
-		.config    = (char *) "krava22",
+		.config    = "krava22",
 		.val.num   = 11,
 		.type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
 		.type_term = PARSE_EVENTS__TERM_TYPE_USER,
 	},
 	{
-		.config    = (char *) "krava23",
+		.config    = "krava23",
 		.val.num   = 2,
 		.type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
 		.type_term = PARSE_EVENTS__TERM_TYPE_USER,

tools/perf/util/parse-events.c

@@ -199,7 +199,7 @@ static void fix_raw(struct list_head *config_terms, struct perf_pmu *pmu)
 			continue;
 
 		if (perf_pmu__have_event(pmu, term->val.str)) {
-			free(term->config);
+			zfree(&term->config);
 			term->config = term->val.str;
 			term->type_val = PARSE_EVENTS__TERM_TYPE_NUM;
 			term->type_term = PARSE_EVENTS__TERM_TYPE_USER;
@@ -208,7 +208,7 @@ static void fix_raw(struct list_head *config_terms, struct perf_pmu *pmu)
 			continue;
 		}
 
-		free(term->config);
+		zfree(&term->config);
 		term->config = strdup("config");
 		errno = 0;
 		num = strtoull(term->val.str + 1, NULL, 16);
@@ -1416,7 +1416,7 @@ int parse_events_multi_pmu_add(struct parse_events_state *parse_state,
 	struct perf_pmu *pmu = NULL;
 	YYLTYPE *loc = loc_;
 	int ok = 0;
-	char *config;
+	const char *config;
 
 	*listp = NULL;
 
@@ -1435,7 +1435,7 @@ int parse_events_multi_pmu_add(struct parse_events_state *parse_state,
 				   PARSE_EVENTS__TERM_TYPE_USER,
 				   config, 1, false, NULL,
 					NULL) < 0) {
-		free(config);
+		zfree(&config);
 		goto out_err;
 	}
 	list_add_tail(&term->list, head);
@@ -2378,7 +2378,7 @@ static int new_term(struct parse_events_term **_term,
 }
 
 int parse_events_term__num(struct parse_events_term **term,
-			   int type_term, char *config, u64 num,
+			   int type_term, const char *config, u64 num,
 			   bool no_value,
 			   void *loc_term_, void *loc_val_)
 {

tools/perf/util/parse-events.h

@@ -83,7 +83,7 @@ enum {
 };
 
 struct parse_events_term {
-	char *config;
+	const char *config;
 	union {
 		char *str;
 		u64  num;
@@ -138,7 +138,7 @@ bool parse_events__filter_pmu(const struct parse_events_state *parse_state,
 void parse_events__shrink_config_terms(void);
 int parse_events__is_hardcoded_term(struct parse_events_term *term);
 int parse_events_term__num(struct parse_events_term **term,
-			   int type_term, char *config, u64 num,
+			   int type_term, const char *config, u64 num,
 			   bool novalue,
 			   void *loc_term, void *loc_val);
 int parse_events_term__str(struct parse_events_term **term,

tools/perf/util/pmu.c

@@ -1418,7 +1418,7 @@ static struct perf_pmu_alias *pmu_find_alias(struct perf_pmu *pmu,
 					     struct parse_events_term *term)
 {
 	struct perf_pmu_alias *alias;
-	char *name;
+	const char *name;
 
 	if (parse_events__is_hardcoded_term(term))
 		return NULL;