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| author | Jiri Olsa <jolsa@kernel.org> | 2016-07-04 15:16:22 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2016-07-05 02:27:12 +0300 |
| commit | a2873325ffb21cecca8032673eb698cb4d778dc6 (patch) | |
| tree | a71d006f2ccebeefa1cd52a1e38a1dba5fa81e25 /tools/perf/util/unwind-libunwind.c | |
| parent | 347ca878062d5fb0e16db1fae81b0994f2457efd (diff) | |
| download | linux-a2873325ffb21cecca8032673eb698cb4d778dc6.tar.xz | |
perf unwind: Add initialized arg into unwind__prepare_access
Adding initialized arg into unwind__prepare_access to get feedback about
the initialization state.
It's not possible to get it from error code, because we return 0 even in
case we don't recognize dso, which is valid.
The 'initialized' value is used in following patch to speedup
unwind__prepare_access calls logic in fork path.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: He Kuang <hekuang@huawei.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1467634583-29147-4-git-send-email-jolsa@kernel.org
[ Remove ; after static inline function signatures, fixes build break ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/unwind-libunwind.c')
| -rw-r--r-- | tools/perf/util/unwind-libunwind.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/tools/perf/util/unwind-libunwind.c b/tools/perf/util/unwind-libunwind.c index 854711966cad..6d542a4e0648 100644 --- a/tools/perf/util/unwind-libunwind.c +++ b/tools/perf/util/unwind-libunwind.c @@ -14,15 +14,19 @@ static void unwind__register_ops(struct thread *thread, thread->unwind_libunwind_ops = ops; } -int unwind__prepare_access(struct thread *thread, struct map *map) +int unwind__prepare_access(struct thread *thread, struct map *map, + bool *initialized) { const char *arch; enum dso_type dso_type; struct unwind_libunwind_ops *ops = local_unwind_libunwind_ops; + int err; if (thread->addr_space) { pr_debug("unwind: thread map already set, dso=%s\n", map->dso->name); + if (initialized) + *initialized = true; return 0; } @@ -51,7 +55,10 @@ int unwind__prepare_access(struct thread *thread, struct map *map) out_register: unwind__register_ops(thread, ops); - return thread->unwind_libunwind_ops->prepare_access(thread); + err = thread->unwind_libunwind_ops->prepare_access(thread); + if (initialized) + *initialized = err ? false : true; + return err; } void unwind__flush_access(struct thread *thread) |