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[PULL,04/13] io: check there are no qio_channel_yield() coroutines during ->finalize()

Message ID 20230908013535.990731-19-eblake@redhat.com
State New
Headers show
Series [PULL,01/13] qemu-iotests/197: use more generic commands for formats other than qcow2 | expand

Commit Message

Eric Blake Sept. 8, 2023, 1:35 a.m. UTC 
From: Stefan Hajnoczi <stefanha@redhat.com>

Callers must clean up their coroutines before calling
object_unref(OBJECT(ioc)) to prevent an fd handler leak. Add an
assertion to check this.

This patch is preparation for the fd handler changes that follow.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-ID: <20230830224802.493686-4-stefanha@redhat.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
---
 io/channel.c | 4 ++++
 1 file changed, 4 insertions(+)
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Patch

diff --git a/io/channel.c b/io/channel.c
index 72f0066af55..c415f3fc885 100644
--- a/io/channel.c
+++ b/io/channel.c
@@ -653,6 +653,10 @@  static void qio_channel_finalize(Object *obj)
 {
     QIOChannel *ioc = QIO_CHANNEL(obj);

+    /* Must not have coroutines in qio_channel_yield() */
+    assert(!ioc->read_coroutine);
+    assert(!ioc->write_coroutine);
+
     g_free(ioc->name);

 #ifdef _WIN32