[PATCH v6 09/10] perf tools: add a deep delete for parse event terms

From: Ian Rogers <irogers@google.com>
To: Peter Zijlstra <peterz@infradead.org>,
	Ingo Molnar <mingo@redhat.com>,
	Arnaldo Carvalho de Melo <acme@kernel.org>,
	Mark Rutland <mark.rutland@arm.com>,
	Alexander Shishkin <alexander.shishkin@linux.intel.com>,
	Jiri Olsa <jolsa@redhat.com>, Namhyung Kim <namhyung@kernel.org>,
	Alexei Starovoitov <ast@kernel.org>,
	Daniel Borkmann <daniel@iogearbox.net>,
	Martin KaFai Lau <kafai@fb.com>, Song Liu <songliubraving@fb.com>,
	Yonghong Song <yhs@fb.com>, Andi Kleen <ak@linux.intel.com>,
	Jin Yao <yao.jin@linux.intel.com>,
	Adrian Hunter <adrian.hunter@intel.com>,
	Kan Liang <kan.liang@linux.intel.com>,
	John Garry <john.garry@huawei.com>,
	linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
	bpf@vger.kernel.org, clang-built-linux@googlegroups.com
Cc: Stephane Eranian <eranian@google.com>, Ian Rogers <irogers@google.com>
Subject: [PATCH v6 09/10] perf tools: add a deep delete for parse event terms
Date: Thu,  7 Nov 2019 14:14:27 -0800	[thread overview]
Message-ID: <20191107221428.168286-10-irogers@google.com> (raw)
In-Reply-To: <20191107221428.168286-1-irogers@google.com>

Add a parse_events_term deep delete function so that owned strings and
arrays are freed.

Signed-off-by: Ian Rogers <irogers@google.com>
---
 tools/perf/util/parse-events.c | 16 +++++++++++++---
 tools/perf/util/parse-events.h |  1 +
 tools/perf/util/parse-events.y | 12 ++----------
 tools/perf/util/pmu.c          |  2 +-
 4 files changed, 17 insertions(+), 14 deletions(-)

diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index a0a80f4e7038..6d18ff9bce49 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -2812,6 +2812,18 @@ int parse_events_term__clone(struct parse_events_term **new,
 	return new_term(new, &temp, str, 0);
 }
 
+void parse_events_term__delete(struct parse_events_term *term)
+{
+	if (term->array.nr_ranges)
+		zfree(&term->array.ranges);
+
+	if (term->type_val != PARSE_EVENTS__TERM_TYPE_NUM)
+		zfree(&term->val.str);
+
+	zfree(&term->config);
+	free(term);
+}
+
 int parse_events_copy_term_list(struct list_head *old,
 				 struct list_head **new)
 {
@@ -2842,10 +2854,8 @@ void parse_events_terms__purge(struct list_head *terms)
 	struct parse_events_term *term, *h;
 
 	list_for_each_entry_safe(term, h, terms, list) {
-		if (term->array.nr_ranges)
-			zfree(&term->array.ranges);
 		list_del_init(&term->list);
-		free(term);
+		parse_events_term__delete(term);
 	}
 }
 
diff --git a/tools/perf/util/parse-events.h b/tools/perf/util/parse-events.h
index 34f58d24a06a..5ee8ac93840c 100644
--- a/tools/perf/util/parse-events.h
+++ b/tools/perf/util/parse-events.h
@@ -139,6 +139,7 @@ int parse_events_term__sym_hw(struct parse_events_term **term,
 			      char *config, unsigned idx);
 int parse_events_term__clone(struct parse_events_term **new,
 			     struct parse_events_term *term);
+void parse_events_term__delete(struct parse_events_term *term);
 void parse_events_terms__delete(struct list_head *terms);
 void parse_events_terms__purge(struct list_head *terms);
 void parse_events__clear_array(struct parse_events_array *a);
diff --git a/tools/perf/util/parse-events.y b/tools/perf/util/parse-events.y
index 376b19855470..4cac830015be 100644
--- a/tools/perf/util/parse-events.y
+++ b/tools/perf/util/parse-events.y
@@ -49,14 +49,6 @@ static void free_list_evsel(struct list_head* list_evsel)
 	free(list_evsel);
 }
 
-static void free_term(struct parse_events_term *term)
-{
-	if (term->type_val == PARSE_EVENTS__TERM_TYPE_STR)
-		free(term->val.str);
-	zfree(&term->array.ranges);
-	free(term);
-}
-
 static void inc_group_count(struct list_head *list,
 		       struct parse_events_state *parse_state)
 {
@@ -99,7 +91,7 @@ static void inc_group_count(struct list_head *list,
 %type <str> PE_DRV_CFG_TERM
 %destructor { free ($$); } <str>
 %type <term> event_term
-%destructor { free_term ($$); } <term>
+%destructor { parse_events_term__delete ($$); } <term>
 %type <list_terms> event_config
 %type <list_terms> opt_event_config
 %type <list_terms> opt_pmu_config
@@ -694,7 +686,7 @@ event_config ',' event_term
 	struct parse_events_term *term = $3;
 
 	if (!head) {
-		free_term(term);
+		parse_events_term__delete(term);
 		YYABORT;
 	}
 	list_add_tail(&term->list, head);
diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
index f9f427d4c313..db1e57113f4b 100644
--- a/tools/perf/util/pmu.c
+++ b/tools/perf/util/pmu.c
@@ -1260,7 +1260,7 @@ int perf_pmu__check_alias(struct perf_pmu *pmu, struct list_head *head_terms,
 		info->metric_name = alias->metric_name;
 
 		list_del_init(&term->list);
-		free(term);
+		parse_events_term__delete(term);
 	}
 
 	/*
-- 
2.24.0.432.g9d3f5f5b63-goog

