diff options
Diffstat (limited to 'tools/perf/util/thread.c')
| -rw-r--r-- | tools/perf/util/thread.c | 37 |
1 files changed, 35 insertions, 2 deletions
diff --git a/tools/perf/util/thread.c b/tools/perf/util/thread.c index 2439b122a4e4..8b10a55410a2 100644 --- a/tools/perf/util/thread.c +++ b/tools/perf/util/thread.c @@ -212,6 +212,39 @@ int thread__insert_map(struct thread *thread, struct map *map) return 0; } +static int __thread__prepare_access(struct thread *thread) +{ + bool initialized = false; + int i, err = 0; + + for (i = 0; i < MAP__NR_TYPES; ++i) { + struct maps *maps = &thread->mg->maps[i]; + struct map *map; + + pthread_rwlock_rdlock(&maps->lock); + + for (map = maps__first(maps); map; map = map__next(map)) { + err = unwind__prepare_access(thread, map, &initialized); + if (err || initialized) + break; + } + + pthread_rwlock_unlock(&maps->lock); + } + + return err; +} + +static int thread__prepare_access(struct thread *thread) +{ + int err = 0; + + if (symbol_conf.use_callchain) + err = __thread__prepare_access(thread); + + return err; +} + static int thread__clone_map_groups(struct thread *thread, struct thread *parent) { @@ -219,7 +252,7 @@ static int thread__clone_map_groups(struct thread *thread, /* This is new thread, we share map groups for process. */ if (thread->pid_ == parent->pid_) - return 0; + return thread__prepare_access(thread); if (thread->mg == parent->mg) { pr_debug("broken map groups on thread %d/%d parent %d/%d\n", @@ -229,7 +262,7 @@ static int thread__clone_map_groups(struct thread *thread, /* But this one is new process, copy maps. */ for (i = 0; i < MAP__NR_TYPES; ++i) - if (map_groups__clone(thread->mg, parent->mg, i) < 0) + if (map_groups__clone(thread, parent->mg, i) < 0) return -ENOMEM; return 0; |