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perf unwind: Add initialized arg into unwind__prepare_access

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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>
This commit is contained in:
Jiri Olsa
2016-07-04 14:16:22 +02:00
committed by Arnaldo Carvalho de Melo
parent 347ca87806
commit a2873325ff
3 changed files with 16 additions and 6 deletions
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9
tools/perf/util/unwind.h
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@@ -42,12 +42,14 @@ int unwind__get_entries(unwind_entry_cb_t cb, void *arg,
#endif
int LIBUNWIND__ARCH_REG_ID(int regnum);
int unwind__prepare_access(struct thread *thread, struct map *map);
int unwind__prepare_access(struct thread *thread, struct map *map,
bool *initialized);
void unwind__flush_access(struct thread *thread);
void unwind__finish_access(struct thread *thread);
#else
static inline int unwind__prepare_access(struct thread *thread __maybe_unused,
struct map *map __maybe_unused)
struct map *map __maybe_unused,
bool *initialized __maybe_unused)
{
return 0;
}
@@ -67,7 +69,8 @@ unwind__get_entries(unwind_entry_cb_t cb __maybe_unused,
}
static inline int unwind__prepare_access(struct thread *thread __maybe_unused,
struct map *map __maybe_unused)
struct map *map __maybe_unused,
bool *initialized __maybe_unused)
{
return 0;
}