perf jevents: Fix leak of mapfile memory

The memory for global pointer is never freed during normal program
execution, so let's do that in the main function exit as a good
programming practice.

A stray blank line is also removed.

Reported-by: Jiri Olsa <jolsa@redhat.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: James Clark <james.clark@arm.com>
Cc: Joakim Zhang <qiangqing.zhang@nxp.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will@kernel.org>
Cc: linuxarm@huawei.com
Link: http://lore.kernel.org/lkml/1583406486-154841-2-git-send-email-john.garry@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/pmu-events/jevents.c b/tools/perf/pmu-events/jevents.c
index 079c77b6a2fdfd236ca57fe424a6e04059291236..27b4da80f751177968848ff1656caaa5e91dfb1c 100644 (file)
--- a/tools/perf/pmu-events/jevents.c
+++ b/tools/perf/pmu-events/jevents.c
@@ -1082,10 +1082,9 @@ static int process_one_file(const char *fpath, const struct stat *sb,
  */
 int main(int argc, char *argv[])
 {
-       int rc;
+       int rc, ret = 0;
        int maxfds;
        char ldirname[PATH_MAX];
-
        const char *arch;
        const char *output_file;
        const char *start_dirname;
@@ -1156,7 +1155,8 @@ int main(int argc, char *argv[])
                /* Make build fail */
                fclose(eventsfp);
                free_arch_std_events();
-               return 1;
+               ret = 1;
+               goto out_free_mapfile;
        } else if (rc) {
                goto empty_map;
        }
@@ -1174,14 +1174,17 @@ int main(int argc, char *argv[])
                /* Make build fail */
                fclose(eventsfp);
                free_arch_std_events();
-               return 1;
+               ret = 1;
        }
 
-       return 0;
+
+       goto out_free_mapfile;
 
 empty_map:
        fclose(eventsfp);
        create_empty_mapping(output_file);
        free_arch_std_events();
-       return 0;
+out_free_mapfile:
+       free(mapfile);
+       return ret;
 }