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FS-10231: [freeswitch-core] Some media bugs not fully cleaned up when session is destroyed #comment Regression causing deadlock when holding write lock and close/destroying all the bugs but the video recording thread tries to read lock. Separating destroy out so it can be called outside the lock after the bugs are detached.

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This commit is contained in:
Anthony Minessale 2017-05-23 12:30:50 -05:00
parent 49468d480f
commit a14651110b
2 changed files with 80 additions and 54 deletions

2
src/include/switch_core.h

@ -398,7 +398,7 @@ SWITCH_DECLARE(switch_status_t) switch_core_media_bug_remove_callback(switch_cor
\param bug bug to remove
\return SWITCH_STATUS_SUCCESS if the operation was a success
*/
SWITCH_DECLARE(switch_status_t) switch_core_media_bug_close(_Inout_ switch_media_bug_t **bug);
SWITCH_DECLARE(switch_status_t) switch_core_media_bug_close(_Inout_ switch_media_bug_t **bug, switch_bool_t destroy);
/*!
\brief Remove all media bugs from the session
\param session the session to remove the bugs from

124
src/switch_core_media_bug.c

@ -35,22 +35,56 @@
#include "switch.h"
#include "private/switch_core_pvt.h"
static void switch_core_media_bug_destroy(switch_media_bug_t *bug)
static void switch_core_media_bug_destroy(switch_media_bug_t **bug)
{
switch_event_t *event = NULL;
switch_media_bug_t *bp = *bug;
if (bug->raw_read_buffer) {
switch_buffer_destroy(&bug->raw_read_buffer);
*bug = NULL;
if (bp->text_buffer) {
switch_buffer_destroy(&bp->text_buffer);
switch_safe_free(bp->text_framedata);
}
if (bug->raw_write_buffer) {
switch_buffer_destroy(&bug->raw_write_buffer);
switch_img_free(&bp->spy_img[0]);
switch_img_free(&bp->spy_img[1]);
if (bp->video_bug_thread) {
switch_status_t st;
int i;
for (i = 0; i < 2; i++) {
void *pop;
switch_image_t *img;
if (bp->spy_video_queue[i]) {
while (switch_queue_trypop(bp->spy_video_queue[i], &pop) == SWITCH_STATUS_SUCCESS && pop) {
img = (switch_image_t *) pop;
switch_img_free(&img);
}
}
}
switch_thread_join(&st, bp->video_bug_thread);
}
if (switch_test_flag(bp, SMBF_READ_VIDEO_PATCH) && bp->session->video_read_codec) {
switch_clear_flag(bp->session->video_read_codec, SWITCH_CODEC_FLAG_VIDEO_PATCHING);
}
if (bp->raw_read_buffer) {
switch_buffer_destroy(&bp->raw_read_buffer);
}
if (bp->raw_write_buffer) {
switch_buffer_destroy(&bp->raw_write_buffer);
}
if (switch_event_create(&event, SWITCH_EVENT_MEDIA_BUG_STOP) == SWITCH_STATUS_SUCCESS) {
switch_event_add_header(event, SWITCH_STACK_BOTTOM, "Media-Bug-Function", "%s", bug->function);
switch_event_add_header(event, SWITCH_STACK_BOTTOM, "Media-Bug-Target", "%s", bug->target);
if (bug->session) switch_channel_event_set_data(bug->session->channel, event);
switch_event_add_header(event, SWITCH_STACK_BOTTOM, "Media-Bug-Function", "%s", bp->function);
switch_event_add_header(event, SWITCH_STACK_BOTTOM, "Media-Bug-Target", "%s", bp->target);
if (bp->session) switch_channel_event_set_data(bp->session->channel, event);
switch_event_fire(&event);
}
}
@ -899,7 +933,7 @@ SWITCH_DECLARE(switch_status_t) switch_core_media_bug_add(switch_core_session_t
if (bug->callback) {
switch_bool_t result = bug->callback(bug, bug->user_data, SWITCH_ABC_TYPE_INIT);
if (result == SWITCH_FALSE) {
switch_core_media_bug_destroy(bug);
switch_core_media_bug_destroy(&bug);
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_ERROR, "Error attaching BUG to %s\n",
switch_channel_get_name(session->channel));
return SWITCH_STATUS_GENERR;
@ -1043,7 +1077,7 @@ SWITCH_DECLARE(switch_status_t) switch_core_media_bug_transfer_callback(switch_c
switch_core_media_bug_add(new_session, cur->function, cur->target, cur->callback,
user_data_dup_func(new_session, cur->user_data),
cur->stop_time, cur->flags, &new_bug);
switch_core_media_bug_destroy(cur);
switch_core_media_bug_destroy(&cur);
total++;
} else {
last = cur;
@ -1193,6 +1227,7 @@ SWITCH_DECLARE(switch_status_t) switch_core_media_bug_remove_all_function(switch
{
switch_media_bug_t *bp, *last = NULL, *next = NULL;
switch_status_t status = SWITCH_STATUS_FALSE;
switch_media_bug_t *closed = NULL;
if (session->bugs) {
switch_thread_rwlock_wrlock(session->bug_rwlock);
@ -1217,12 +1252,21 @@ SWITCH_DECLARE(switch_status_t) switch_core_media_bug_remove_all_function(switch
session->bugs = bp->next;
}
switch_core_media_bug_close(&bp);
bp->next = closed;
closed = bp;
switch_core_media_bug_close(&bp, SWITCH_FALSE);
}
switch_thread_rwlock_unlock(session->bug_rwlock);
status = SWITCH_STATUS_SUCCESS;
}
if (closed) {
for (bp = session->bugs; bp; bp = bp->next) {
switch_core_media_bug_destroy(&bp);
}
}
if (switch_core_codec_ready(&session->bug_codec)) {
switch_core_codec_destroy(&session->bug_codec);
}
@ -1230,7 +1274,7 @@ SWITCH_DECLARE(switch_status_t) switch_core_media_bug_remove_all_function(switch
return status;
}
SWITCH_DECLARE(switch_status_t) switch_core_media_bug_close(switch_media_bug_t **bug)
SWITCH_DECLARE(switch_status_t) switch_core_media_bug_close(switch_media_bug_t **bug, switch_bool_t destroy)
{
switch_media_bug_t *bp = *bug;
@ -1244,36 +1288,12 @@ SWITCH_DECLARE(switch_status_t) switch_core_media_bug_close(switch_media_bug_t *
bp->callback(bp, bp->user_data, SWITCH_ABC_TYPE_CLOSE);
}
if (bp->text_buffer) {
switch_buffer_destroy(&bp->text_buffer);
switch_safe_free(bp->text_framedata);
}
if (switch_test_flag(bp, SMBF_READ_VIDEO_STREAM) || switch_test_flag(bp, SMBF_WRITE_VIDEO_STREAM) || switch_test_flag(bp, SMBF_READ_VIDEO_PING) || switch_test_flag(bp, SMBF_WRITE_VIDEO_PING)) {
switch_channel_clear_flag_recursive(bp->session->channel, CF_VIDEO_DECODED_READ);
}
bp->ready = 0;
switch_img_free(&bp->spy_img[0]);
switch_img_free(&bp->spy_img[1]);
if (bp->video_bug_thread) {
switch_status_t st;
int i;
for (i = 0; i < 2; i++) {
void *pop;
switch_image_t *img;
if (bp->spy_video_queue[i]) {
while (switch_queue_trypop(bp->spy_video_queue[i], &pop) == SWITCH_STATUS_SUCCESS && pop) {
img = (switch_image_t *) pop;
switch_img_free(&img);
}
}
}
if (bp->read_video_queue) {
switch_queue_push(bp->read_video_queue, NULL);
}
@ -1282,17 +1302,13 @@ SWITCH_DECLARE(switch_status_t) switch_core_media_bug_close(switch_media_bug_t *
switch_queue_push(bp->write_video_queue, NULL);
}
switch_thread_join(&st, bp->video_bug_thread);
}
if (switch_test_flag(bp, SMBF_READ_VIDEO_PATCH) && bp->session->video_read_codec) {
switch_clear_flag(bp->session->video_read_codec, SWITCH_CODEC_FLAG_VIDEO_PATCHING);
}
switch_core_media_bug_destroy(bp);
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(switch_core_media_bug_get_session(*bug)), SWITCH_LOG_DEBUG, "Removing BUG from %s\n",
switch_channel_get_name(bp->session->channel));
*bug = NULL;
if (destroy) {
switch_core_media_bug_destroy(bug);
}
return SWITCH_STATUS_SUCCESS;
}
@ -1346,7 +1362,7 @@ SWITCH_DECLARE(switch_status_t) switch_core_media_bug_remove(switch_core_session
switch_thread_rwlock_unlock(session->bug_rwlock);
if (bp) {
status = switch_core_media_bug_close(&bp);
status = switch_core_media_bug_close(&bp, SWITCH_TRUE);
}
return status;
@ -1386,7 +1402,7 @@ SWITCH_DECLARE(uint32_t) switch_core_media_bug_prune(switch_core_session_t *sess
if (bp) {
switch_clear_flag(bp, SMBF_LOCK);
bp->thread_id = 0;
switch_core_media_bug_close(&bp);
switch_core_media_bug_close(&bp, SWITCH_TRUE);
ttl++;
goto top;
}
@ -1397,7 +1413,7 @@ SWITCH_DECLARE(uint32_t) switch_core_media_bug_prune(switch_core_session_t *sess
SWITCH_DECLARE(switch_status_t) switch_core_media_bug_remove_callback(switch_core_session_t *session, switch_media_bug_callback_t callback)
{
switch_media_bug_t *cur = NULL, *bp = NULL, *last = NULL;
switch_media_bug_t *cur = NULL, *bp = NULL, *last = NULL, *closed = NULL;
int total = 0;
switch_thread_rwlock_wrlock(session->bug_rwlock);
@ -1413,15 +1429,25 @@ SWITCH_DECLARE(switch_status_t) switch_core_media_bug_remove_callback(switch_cor
} else {
session->bugs = cur->next;
}
if (switch_core_media_bug_close(&cur) == SWITCH_STATUS_SUCCESS) {
if (switch_core_media_bug_close(&cur, SWITCH_FALSE) == SWITCH_STATUS_SUCCESS) {
total++;
}
cur->next = closed;
closed = cur;
} else {
last = cur;
}
}
}
if (closed) {
for (bp = session->bugs; bp; bp = bp->next) {
switch_core_media_bug_destroy(&bp);
}
}
if (!session->bugs && switch_core_codec_ready(&session->bug_codec)) {
switch_core_codec_destroy(&session->bug_codec);
}