glib-2.0: Backport GMainContext fixes

Backport fixes introduced in 2.63.6 for memory leaks and memory corruption in
GMainContext

Upstream merge: https://gitlab.gnome.org/GNOME/glib/-/merge_requests/1353

Fixes SIGSEGV in GStreamer:

    Thread 2 "multihandlesink" received signal SIGSEGV, Segmentation fault.
    [Switching to Thread 0x7ffff6bb9700 (LWP 18045)]
    0x00007ffff7d65992 in g_source_unref_internal (source=0x7ffff00047d0, context=0x55555561c800, have_lock=1) at ../../../../../../../repo/workspace/sources/glib-2.0/glib/gmain.c:2146
    2146    ../../../../../../../repo/workspace/sources/glib-2.0/glib/gmain.c: No such file or directory.
    (gdb) bt
    #0  0x00007ffff7d65992 in g_source_unref_internal (source=0x7ffff00047d0, context=0x55555561c800, have_lock=1) at ../../../../../../../repo/workspace/sources/glib-2.0/glib/gmain.c:2146
    #1  0x00007ffff7d65bb6 in g_source_iter_next (iter=iter@entry=0x7ffff6bb8db0, source=source@entry=0x7ffff6bb8da8) at ../../../../../../../repo/workspace/sources/glib-2.0/glib/gmain.c:980
    #2  0x00007ffff7d67ef3 in g_main_context_prepare (context=context@entry=0x55555561c800, priority=priority@entry=0x7ffff6bb8e30) at ../../../../../../../repo/workspace/sources/glib-2.0/glib/gmain.c:944
    #3  0x00007ffff7d6896b in g_main_context_iterate (context=context@entry=0x55555561c800, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../../../../../../../repo/workspace/sources/glib-2.0/glib/gmain.c:3900
    #4  0x00007ffff7d68b4c in g_main_context_iteration (context=0x55555561c800, may_block=may_block@entry=1) at ../../../../../../../repo/workspace/sources/glib-2.0/glib/gmain.c:3981
    #5  0x00007ffff6be4482 in gst_multi_socket_sink_thread (mhsink=0x555555679ab0 [GstMultiSocketSink]) at ../../../gst-plugins-base-1.14.4/gst/tcp/gstmultisocketsink.c:1164
    #6  0x00007ffff7d8fb35 in g_thread_proxy (data=0x55555565c770) at ../../../../../../../repo/workspace/sources/glib-2.0/glib/gthread.c:784
    #7  0x00007ffff7841ebd in start_thread (arg=<optimized out>) at pthread_create.c:486
    #8  0x00007ffff7aa12bf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
    #8  0x00007ffff7aa12bf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

(From OE-Core rev: 62eb45e6455df99b0c8b61bfb90858bb656bd724)

Signed-off-by: Daniel Gomez <daniel@qtec.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 36 insertions, 0 deletions

diff --git a/meta/recipes-core/glib-2.0/glib-2.0/0013-GMainContext-Move-mutex-unlocking-in-destructor-righ.patch b/meta/recipes-core/glib-2.0/glib-2.0/0013-GMainContext-Move-mutex-unlocking-in-destructor-righ.patch
new file mode 100644
index 0000000000..4c9e9f5182
--- /dev/null
+++ b/meta/recipes-core/glib-2.0/glib-2.0/0013-GMainContext-Move-mutex-unlocking-in-destructor-righ.patch
@@ -0,0 +1,36 @@
+From 3e9d85f1b75e2b1096d9643563d7d17380752fc7 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Sebastian=20Dr=C3=B6ge?= <sebastian@centricular.com>
+Date: Tue, 11 Feb 2020 09:34:38 +0200
+Subject: [PATCH] GMainContext - Move mutex unlocking in destructor right
+ before freeing the mutex
+
+This does not have any behaviour changes but is cleaner. The mutex is
+only unlocked now after all operations on the context are done and right
+before freeing the mutex and the context itself.
+
+Upstream-Status: Backport [https://gitlab.gnome.org/GNOME/glib/-/commit/730a75fc8e8271c38fbd5363d1f77a00876b9ddc]
+
+---
+ glib/gmain.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/glib/gmain.c b/glib/gmain.c
+index 10ba2f8..b1df470 100644
+--- a/glib/gmain.c
++++ b/glib/gmain.c
+@@ -584,7 +584,6 @@ g_main_context_unref (GMainContext *context)
+       source = s_iter->data;
+       g_source_destroy_internal (source, context, TRUE);
+     }
+-  UNLOCK_CONTEXT (context);
+
+   for (sl_iter = context->source_lists; sl_iter; sl_iter = sl_iter->next)
+     {
+@@ -595,6 +594,7 @@ g_main_context_unref (GMainContext *context)
+
+   g_hash_table_destroy (context->sources);
+
++  UNLOCK_CONTEXT (context);
+   g_mutex_clear (&context->mutex);
+
+   g_ptr_array_free (context->pending_dispatches, TRUE);