Re: [Qemu-devel] [PATCH v4] thread: move detach_thread from creating thread to created thread

[Eric Blake]

On 11/27/2017 10:46 PM, linzhecheng wrote:
> If we create a thread with QEMU_THREAD_DETACHED mode, QEMU may get a segfault 
> in a low probability.

> The root cause of this problem is a bug of glibc(version 2.17,the latest 
> version has the same bug),
> let's see what happened in glibc's code.

Have you reported this bug to the glibc folks, and if so, can we include 
a URL to the glibc bugzilla?

Working around the glibc bug is nice, but glibc should really be fixed 
so that other projects do not have to continue working around it.


> QEMU get a segfault at line 50, becasue pd is an invalid address.
> pd is still valid at line 38 when set pd->joinid = pd, at this moment,
> created thread is just exiting(only keeps runing for a short time),

s/runing/running/

--
Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3266
Virtualization:  qemu.org | libvirt.org