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| author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2015-05-25 21:59:56 +0200 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2015-05-28 01:27:30 +0200 |
| commit | 84c2cafa288939e11d21c7830e32b2aee21b723e (patch) | |
| tree | 237bef793c61dbb04a090e9bb750f197c5429b39 /tools/perf/util/machine.c | |
| parent | perf tools: Check if a map is still in use when deleting it (diff) | |
| download | linux-84c2cafa288939e11d21c7830e32b2aee21b723e.tar.xz linux-84c2cafa288939e11d21c7830e32b2aee21b723e.zip | |
perf tools: Reference count struct map
We have pointers to struct map instances in several places, like in the
hist_entry instances, so we need a way to know when we can destroy them,
otherwise we may either keep leaking them or end up referencing deleted
instances.
Start fixing it by reference counting them.
This patch puts the reference count for struct map in place, replacing
direct map__delete() calls with map__put() ones and then grabbing a
reference count when adding it to the maps struct where maps for a
struct thread are kept.
Next we'll grab reference counts when setting pointers to struct map
instances, in places like in the hist_entry code.
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: David Ahern <dsahern@gmail.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-wi19xczk0t2a41r1i2chuio5@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/machine.c')
| -rw-r--r-- | tools/perf/util/machine.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c index 6bf845758ae3..0c0e61cce577 100644 --- a/tools/perf/util/machine.c +++ b/tools/perf/util/machine.c @@ -759,7 +759,6 @@ void machine__destroy_kernel_maps(struct machine *machine) kmap->ref_reloc_sym = NULL; } - map__delete(machine->vmlinux_maps[type]); machine->vmlinux_maps[type] = NULL; } } @@ -1247,6 +1246,7 @@ int machine__process_mmap2_event(struct machine *machine, thread__insert_map(thread, map); thread__put(thread); + map__put(map); return 0; out_problem_map: @@ -1297,6 +1297,7 @@ int machine__process_mmap_event(struct machine *machine, union perf_event *event thread__insert_map(thread, map); thread__put(thread); + map__put(map); return 0; out_problem_map: |