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Code Issues 1 Projects Releases Wiki Activity

funnel: Fix racy state change

Browse source 
Iterator may need to be resynced, for instance if pads are released
during state change.

got_eos should be protected by the object lock of the element, not of
the pad, as is the case throughout the rest of the funnel code.

https://bugzilla.gnome.org/show_bug.cgi?id=755343
This commit is contained in:
Stian Selnes 2015-09-21 13:58:51 +02:00 committed by Sebastian Dröge
parent 0fbf1d3eb7
commit 2c60b7eb1f
2 changed files with 44 additions and 4 deletions
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10
plugins/elements/gstfunnel.c
View file

@ -429,10 +429,11 @@ reset_pad (const GValue * data, gpointer user_data)
{
GstPad *pad = g_value_get_object (data);
GstFunnelPad *fpad = GST_FUNNEL_PAD_CAST (pad);
GstFunnel *funnel = user_data;
GST_OBJECT_LOCK (pad);
GST_OBJECT_LOCK (funnel);
fpad->got_eos = FALSE;
GST_OBJECT_UNLOCK (pad);
GST_OBJECT_UNLOCK (funnel);
}
static GstStateChangeReturn
@ -451,9 +452,10 @@ gst_funnel_change_state (GstElement * element, GstStateChange transition)
GstIteratorResult res;
do {
res = gst_iterator_foreach (iter, reset_pad, NULL);
res = gst_iterator_foreach (iter, reset_pad, element);
if (res == GST_ITERATOR_RESYNC)
gst_iterator_resync (iter);
} while (res == GST_ITERATOR_RESYNC);
gst_iterator_free (iter);
if (res == GST_ITERATOR_ERROR)

38
tests/check/elements/funnel.c
View file

@ -23,6 +23,7 @@
# include <config.h>
#endif
#include <gst/check/gstharness.h>
#include <gst/check/gstcheck.h>
struct TestData
@ -372,6 +373,42 @@ GST_START_TEST (test_funnel_gap_event)
GST_END_TEST;
GST_START_TEST (test_funnel_stress)
{
GstHarness *h0 = gst_harness_new_with_padnames ("funnel", "sink_0", "src");
GstHarness *h1 = gst_harness_new_with_element (h0->element, "sink_1", NULL);
GstHarnessThread *state, *req, *push0, *push1;
GstPadTemplate *templ = gst_element_class_get_pad_template (
GST_ELEMENT_GET_CLASS (h0->element), "sink_%u");
GstCaps *caps = gst_caps_from_string ("testcaps");
GstBuffer *buf = gst_buffer_new ();
GstSegment segment;
gst_segment_init (&segment, GST_FORMAT_TIME);
state = gst_harness_stress_statechange_start (h0);
req = gst_harness_stress_requestpad_start (h0, templ, NULL, NULL, TRUE);
push0 = gst_harness_stress_push_buffer_start (h0, caps, &segment, buf);
push1 = gst_harness_stress_push_buffer_start (h1, caps, &segment, buf);
gst_caps_unref (caps);
gst_buffer_unref (buf);
/* test-length */
g_usleep (G_USEC_PER_SEC * 1);
gst_harness_stress_thread_stop (push1);
gst_harness_stress_thread_stop (push0);
gst_harness_stress_thread_stop (req);
gst_harness_stress_thread_stop (state);
gst_harness_teardown (h1);
gst_harness_teardown (h0);
}
GST_END_TEST;
static Suite *
funnel_suite (void)
{
@ -382,6 +419,7 @@ funnel_suite (void)
tcase_add_test (tc_chain, test_funnel_simple);
tcase_add_test (tc_chain, test_funnel_eos);
tcase_add_test (tc_chain, test_funnel_gap_event);
tcase_add_test (tc_chain, test_funnel_stress);
suite_add_tcase (s, tc_chain);
return s;