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iothread: Set the GSource "name" field 

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>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-id: 20230905180359.14083-1-farosas@suse.de
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
master
Fabiano Rosas 2023-09-05 15:03:59 -03:00 committed by Stefan Hajnoczi
parent 03a3a62fbd
commit 1f14c9147c
1 changed files with 8 additions and 6 deletions
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14
iothread.c
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@ -138,12 +138,14 @@ 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, const char *thread_name)
{
GSource *source;
g_autofree char *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);
@ -180,7 +182,7 @@ static void iothread_init(EventLoopBase *base, Error **errp)
{
Error *local_error = NULL;
IOThread *iothread = IOTHREAD(base);
char *thread_name;
g_autofree char *thread_name = NULL;
iothread->stopping = false;
iothread->running = true;
@ -189,11 +191,14 @@ 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) {
@ -206,11 +211,8 @@ 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);
/* Wait for initialization to complete */
while (iothread->thread_id == -1) {