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perf thread_map: Convert thread_map.refcnt from atomic_t to refcount_t

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The refcount_t type and corresponding API should be used instead of
atomic_t when the variable is used as a reference counter.

This allows to avoid accidental refcounter overflows that might lead to
use-after-free situations.

Signed-off-by: Elena Reshetova <elena.reshetova@intel.com>
Signed-off-by: David Windsor <dwindsor@gmail.com>
Signed-off-by: Hans Liljestrand <ishkamiel@gmail.com>
Signed-off-by: Kees Kook <keescook@chromium.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: David Windsor <dwindsor@gmail.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Hans Liljestrand <ishkamiel@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kees Kook <keescook@chromium.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Matija Glavinic Pecotic <matija.glavinic-pecotic.ext@nokia.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: alsa-devel@alsa-project.org
Link: http://lkml.kernel.org/r/1487691303-31858-10-git-send-email-elena.reshetova@intel.com
[ Did missing tests/thread-map.c conversion ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Elena Reshetova
2017-02-21 17:35:03 +02:00
committed by Arnaldo Carvalho de Melo
parent e34f5b11cd
commit 364fed3513
3 changed files with 15 additions and 15 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
tools/perf/tests/thread-map.c
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@@ -29,7 +29,7 @@ int test__thread_map(int subtest __maybe_unused)
thread_map__comm(map, 0) &&
!strcmp(thread_map__comm(map, 0), NAME));
TEST_ASSERT_VAL("wrong refcnt",
atomic_read(&map->refcnt) == 1);
refcount_read(&map->refcnt) == 1);
thread_map__put(map);
/* test dummy pid */
@@ -44,7 +44,7 @@ int test__thread_map(int subtest __maybe_unused)
thread_map__comm(map, 0) &&
!strcmp(thread_map__comm(map, 0), "dummy"));
TEST_ASSERT_VAL("wrong refcnt",
atomic_read(&map->refcnt) == 1);
refcount_read(&map->refcnt) == 1);
thread_map__put(map);
return 0;
}
@@ -71,7 +71,7 @@ static int process_event(struct perf_tool *tool __maybe_unused,
thread_map__comm(threads, 0) &&
!strcmp(thread_map__comm(threads, 0), NAME));
TEST_ASSERT_VAL("wrong refcnt",
atomic_read(&threads->refcnt) == 1);
refcount_read(&threads->refcnt) == 1);
thread_map__put(threads);
return 0;
}