Messages in this thread Patch in this message | | | From | Arnaldo Carvalho de Melo <> | Subject | [PATCH 17/25] perf machine: Mark removed threads as such | Date | Wed, 27 May 2015 12:39:02 -0300 |
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From: Arnaldo Carvalho de Melo <acme@redhat.com>
We use:
BUG_ON(!RB_EMPTY_NODE(&thread->rb_node));
in the thread destructor as a debugging check to find out about possibly still referenced thread instances being deleted, to do that we need to make sure we use RB_CLEAR_NODE() right after rb_erase(), i.e. that we use the newly introduced rb_erase_init(), that works just like list_del_init().
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-4fcqo5ypy1cjjf15ilb0hn78@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> --- tools/perf/util/machine.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c index 7ec3188d3cb3..6bf845758ae3 100644 --- a/tools/perf/util/machine.c +++ b/tools/perf/util/machine.c @@ -400,7 +400,7 @@ static struct thread *____machine__findnew_thread(struct machine *machine, * leader and that would screwed the rb tree. */ if (thread__init_map_groups(th, machine)) { - rb_erase(&th->rb_node, &machine->threads); + rb_erase_init(&th->rb_node, &machine->threads); RB_CLEAR_NODE(&th->rb_node); thread__delete(th); return NULL; @@ -1314,7 +1314,7 @@ static void __machine__remove_thread(struct machine *machine, struct thread *th, BUG_ON(atomic_read(&th->refcnt) == 0); if (lock) pthread_rwlock_wrlock(&machine->threads_lock); - rb_erase(&th->rb_node, &machine->threads); + rb_erase_init(&th->rb_node, &machine->threads); RB_CLEAR_NODE(&th->rb_node); /* * Move it first to the dead_threads list, then drop the reference, -- 2.1.0
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