found 734290 glib2.0/2.43.92-1
found 734290 glib2.0/2.44.1-1
tags 734290 - patch
thanks
Hi,
Robert Millan wrote:
monitor test hangs when running the testsuite on kfreebsd-amd64 (using glibc
2.18).
This was introduced or exposed by:
https://git.gnome.org/browse/glib/commit/?id=548c165a9f8386af29e8bb8243d8923e0f315c2e
We can't really ignore this test failure as it seems any caller of
g_unix_mount_monitor_get() gets stuck in the g_cond_wait() loop.
| ...
| #2 0x00080108426c in g_cond_wait (cond=cond@entry=0x800b9f250
mount_monitor_group+16, mutex=mutex@entry=0x800b9f248 mount_monitor_group+8)
| at /home/steven/glib2.0-2.44.1/./glib/gthread-posix.c:767
| _g_boolean_var_ = optimized out
| status = optimized out
| #3 0x00080085dbe3 in g_context_specific_group_request_state
(group=0x800b9f240 mount_monitor_group, requested_state=optimized out,
| requested_func=optimized out) at
/home/steven/glib2.0-2.44.1/./gio/gcontextspecificgroup.c:157
| No locals.
153 /* we only block for positive transitions */
154 if (requested_state)
155 {
156 while (group-requested_state != group-effective_state)
157 g_cond_wait (group-cond, group-lock);
| #4 0x00080085dca3 in g_context_specific_group_get
(group=group@entry=0x800b9f240 mount_monitor_group, type=optimized out,
| context_offset=context_offset@entry=24,
start_func=start_func@entry=0x8008c03a0 mount_monitor_start)
| at /home/steven/glib2.0-2.44.1/./gio/gcontextspecificgroup.c:202
| css = 0x60f6b0
| context = 0x616340
| #5 0x0008008c16c8 in g_unix_mount_monitor_get () at
/home/steven/glib2.0-2.44.1/./gio/gunixmounts.c:1557
| No locals.
1554 GUnixMountMonitor *
1555 g_unix_mount_monitor_get (void)
1556 {
1557 return g_context_specific_group_get (mount_monitor_group,
1558G_TYPE_UNIX_MOUNT_MONITOR,
1559G_STRUCT_OFFSET(GUnixMountMonitor,
context),
1560mount_monitor_start);
1561 }
It waits there for the constructor to finish (effective_state-1).
But inside the constructor, it sets up a file monitor on /etc/fstab,
and that hangs waiting for the_volume_monitor_mutex already held
somewhere. I'll post a stack trace of that in a followup.
I tried commenting out that mutex in gio/gunionvolumemonitor.c
and it seem to not hang any more, and pass the gio/volumemonitor tests
at least:
581 _g_mount_get_for_mount_path (const gchar *mount_path,
582 GCancellable *cancellable)
583 {
593 if (klass-get_mount_for_mount_path)
594 {
595 // g_rec_mutex_lock (the_volume_monitor_mutex);
596 mount = klass-get_mount_for_mount_path (mount_path, cancellable);
597 // g_rec_mutex_unlock (the_volume_monitor_mutex);
598 }
Regards,
--
Steven Chamberlain
ste...@pyro.eu.org
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