Commit a2873325 authored by Jiri Olsa's avatar Jiri Olsa Committed by Arnaldo Carvalho de Melo

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: default avatarJiri 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: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 347ca878
......@@ -202,7 +202,7 @@ int thread__insert_map(struct thread *thread, struct map *map)
{
int ret;
ret = unwind__prepare_access(thread, map);
ret = unwind__prepare_access(thread, map, NULL);
if (ret)
return ret;
......
......@@ -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)
......
......@@ -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;
}
......
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