[PATCH] iothread: Set the GSource "name" field

[Fabiano Rosas <farosas@suse.de>]

Having a name in the source helps with debugging core dumps when one
might not have access to TLS data to cross-reference AioContexts with
their addresses.

Signed-off-by: Fabiano Rosas <farosas@suse.de>
---
 iothread.c | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/iothread.c b/iothread.c
index b41c305bd9..8cfb9d5be6 100644
--- a/iothread.c
+++ b/iothread.c
@@ -138,15 +138,19 @@ static void iothread_instance_finalize(Object *obj)
     qemu_sem_destroy(&iothread->init_done_sem);
 }
 
-static void iothread_init_gcontext(IOThread *iothread)
+static void iothread_init_gcontext(IOThread *iothread, char *thread_name)
 {
     GSource *source;
+    gchar *name = g_strdup_printf("%s aio-context", thread_name);
 
     iothread->worker_context = g_main_context_new();
     source = aio_get_g_source(iothread_get_aio_context(iothread));
+    g_source_set_name(source, name);
     g_source_attach(source, iothread->worker_context);
     g_source_unref(source);
     iothread->main_loop = g_main_loop_new(iothread->worker_context, TRUE);
+
+    g_free(name);
 }
 
 static void iothread_set_aio_context_params(EventLoopBase *base, Error **errp)
@@ -189,11 +193,14 @@ static void iothread_init(EventLoopBase *base, Error **errp)
         return;
     }
 
+    thread_name = g_strdup_printf("IO %s",
+                        object_get_canonical_path_component(OBJECT(base)));
+
     /*
      * Init one GMainContext for the iothread unconditionally, even if
      * it's not used
      */
-    iothread_init_gcontext(iothread);
+    iothread_init_gcontext(iothread, thread_name);
 
     iothread_set_aio_context_params(base, &local_error);
     if (local_error) {
@@ -206,8 +213,6 @@ static void iothread_init(EventLoopBase *base, Error **errp)
     /* This assumes we are called from a thread with useful CPU affinity for us
      * to inherit.
      */
-    thread_name = g_strdup_printf("IO %s",
-                        object_get_canonical_path_component(OBJECT(base)));
     qemu_thread_create(&iothread->thread, thread_name, iothread_run,
                        iothread, QEMU_THREAD_JOINABLE);
     g_free(thread_name);
-- 
2.35.3