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perf hist: Fix memory leak of a perf_hpp_fmt 

perf_hpp__column_unregister() removes an entry from a list but doesn't
free the memory causing a memory leak spotted by leak sanitizer.

Add the free while at the same time reducing the scope of the function
to static.

Signed-off-by: Ian Rogers <irogers@google.com>
Reviewed-by: Kajol Jain <kjain@linux.ibm.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lore.kernel.org/lkml/20211118071247.2140392-1-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Ian Rogers 2021-11-17 23:12:47 -08:00 committed by Arnaldo Carvalho de Melo
parent 8b8dcc3720
commit 0ca1f534a7
2 changed files with 14 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

28
tools/perf/ui/hist.c
View File

@ -535,6 +535,18 @@ struct perf_hpp_list perf_hpp_list = {
#undef __HPP_SORT_ACC_FN
#undef __HPP_SORT_RAW_FN
static void fmt_free(struct perf_hpp_fmt *fmt)
{
/*
* At this point fmt should be completely
* unhooked, if not it's a bug.
*/
BUG_ON(!list_empty(&fmt->list));
BUG_ON(!list_empty(&fmt->sort_list));
if (fmt->free)
fmt->free(fmt);
}
void perf_hpp__init(void)
{
@ -598,9 +610,10 @@ void perf_hpp_list__prepend_sort_field(struct perf_hpp_list *list,
list_add(&format->sort_list, &list->sorts);
}
void perf_hpp__column_unregister(struct perf_hpp_fmt *format)
static void perf_hpp__column_unregister(struct perf_hpp_fmt *format)
{
list_del_init(&format->list);
fmt_free(format);
}
void perf_hpp__cancel_cumulate(void)
@ -672,19 +685,6 @@ next:
}
static void fmt_free(struct perf_hpp_fmt *fmt)
{
/*
* At this point fmt should be completely
* unhooked, if not it's a bug.
*/
BUG_ON(!list_empty(&fmt->list));
BUG_ON(!list_empty(&fmt->sort_list));
if (fmt->free)
fmt->free(fmt);
}
void perf_hpp__reset_output_field(struct perf_hpp_list *list)
{
struct perf_hpp_fmt *fmt, *tmp;

1
tools/perf/util/hist.h
View File

@ -369,7 +369,6 @@ enum {
};
void perf_hpp__init(void);
void perf_hpp__column_unregister(struct perf_hpp_fmt *format);
void perf_hpp__cancel_cumulate(void);
void perf_hpp__setup_output_field(struct perf_hpp_list *list);
void perf_hpp__reset_output_field(struct perf_hpp_list *list);