Re: [Qemu-devel] [PATCH] coroutine: add ./configure --disable-coroutine-pool

[Stefan Weil <sw@weilnetz.de>]

Am 01.10.2013 09:29, schrieb Gabriel Kerneis:
> On Tue, Oct 01, 2013 at 07:51:24AM +0200, Stefan Weil wrote:
>> $ wine i386-softmmu/qemu-system-i386 -L pc-bios -cdrom /var/tmp/mini.iso
>> -sdl # or -vnc :1
>>
>> => Assertion in qemu-coroutine-lock.c:99.
> Could you please provide the backtrace for this?  I am curious which of the uses
> of qemu_co_queue_restart_all() fails.  I wonder if it is a bug in the
> implementation of qemu_in_coroutine() on your platform, or really a rare
> interleaving which exhibits a bug in the logic of coroutine functions.
>

Here is a GDB protocol. Build environment:

Windows 7 (64 bit) host
MinGW toolchain (not MinGW-w64 which I usually prefer)
./configure && make

$ gdb --args bin/ndebug/mingw32/i386-softmmu/qemu-system-i386 -L pc-bios
-cdrom mini.iso
GNU gdb (GDB) 7.5
Copyright (C) 2012 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later
<http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "i686-pc-mingw32".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from
c:\home\stefan\src\qemu\qemu.org\qemu\bin\ndebug\mingw32\i386-softmmu\qemu-system-i386.exe...done.
(gdb) b abort
Breakpoint 1 at 0x6b0070
(gdb) r
Starting program:
c:\home\stefan\src\qemu\qemu.org\qemu\bin\ndebug\mingw32\i386-softmmu\qemu-system-i386.exe
-L pc-bios -cdrom mini.iso
[New Thread 4120.0x19c4]
[New Thread 4120.0x1724]
[New Thread 4120.0x1a98]
[New Thread 4120.0x1854]
[New Thread 4120.0x1bf8]
VNC server running on `::1:5900'
Assertion failed: qemu_in_coroutine(), file
c:/home/stefan/src/qemu/qemu.org/qemu/qemu-coroutine-lock.c, line 99
[Switching to Thread 4120.0x1a98]

Breakpoint 1, 0x76118e76 in msvcrt!abort ()
   from C:\Windows\syswow64\msvcrt.dll
(gdb) i s
#0  0x76118e76 in msvcrt!abort () from C:\Windows\syswow64\msvcrt.dll
#1  0x7611680c in msvcrt!_assert () from C:\Windows\syswow64\msvcrt.dll
#2  0x00518f2d in qemu_co_queue_restart_all (queue=queue@entry=0x6d3fe90)
    at c:/home/stefan/src/qemu/qemu.org/qemu/qemu-coroutine-lock.c:99
#3  0x0040ee81 in tracked_request_end (req=0x6d3fe6c)
    at c:/home/stefan/src/qemu/qemu.org/qemu/block.c:1963
#4  bdrv_co_do_readv (bs=0x3057658, sector_num=<optimized out>,
nb_sectors=4,
    qiov=0x733f9d0, flags=<optimized out>)
    at c:/home/stefan/src/qemu/qemu.org/qemu/block.c:2675
#5  0x0040ee52 in bdrv_co_do_readv (bs=0x3055c10, sector_num=<optimized
out>,
    nb_sectors=4, qiov=0x733f9d0, flags=<optimized out>)
    at c:/home/stefan/src/qemu/qemu.org/qemu/block.c:2645
#6  0x0040ffbc in bdrv_rw_co_entry (opaque=0x733f968)
    at c:/home/stefan/src/qemu/qemu.org/qemu/block.c:2276
#7  0x00441be8 in coroutine_trampoline (co_=0x3058958)
    at c:/home/stefan/src/qemu/qemu.org/qemu/coroutine-win32.c:57
#8  0x7549bfa2 in KERNEL32!GetQueuedCompletionStatus ()
   from C:\Windows\syswow64\kernel32.dll
#9  0x03058958 in ?? ()
#10 0x7549bf5a in KERNEL32!GetQueuedCompletionStatus ()
   from C:\Windows\syswow64\kernel32.dll
#11 0x014feff0 in ?? ()