[PATCH v4 07/11] perf parse-events: Pass ownership of the group name

From: Ian Rogers
Date: Wed Mar 08 2023 - 18:00:57 EST


Pass ownership of the group name rather than copying and freeing the
original. This saves a memory allocation and copy.

Signed-off-by: Ian Rogers <irogers@xxxxxxxxxx>
---
tools/perf/util/parse-events.c | 3 ++-
tools/perf/util/parse-events.y | 2 +-
2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index 0336ff27c15f..1be454697d57 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -1761,6 +1761,7 @@ parse_events__set_leader_for_uncore_aliase(char *name, struct list_head *list,

handled:
ret = 1;
+ free(name);
out:
free(leaders);
return ret;
@@ -1786,7 +1787,7 @@ void parse_events__set_leader(char *name, struct list_head *list,

leader = arch_evlist__leader(list);
__perf_evlist__set_leader(list, &leader->core);
- leader->group_name = name ? strdup(name) : NULL;
+ leader->group_name = name;
list_move(&leader->core.node, list);
}

diff --git a/tools/perf/util/parse-events.y b/tools/perf/util/parse-events.y
index be8c51770051..541b8dde2063 100644
--- a/tools/perf/util/parse-events.y
+++ b/tools/perf/util/parse-events.y
@@ -202,8 +202,8 @@ PE_NAME '{' events '}'
struct list_head *list = $3;

inc_group_count(list, _parse_state);
+ /* Takes ownership of $1. */
parse_events__set_leader($1, list, _parse_state);
- free($1);
$$ = list;
}
|
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2.40.0.rc0.216.gc4246ad0f0-goog