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[Qemu-devel] [Bug 1673130] Re: qemu 2.7.0 receives SIGABRT in qemu_corou
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From: |
Mohammed Gamal |
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Subject: |
[Qemu-devel] [Bug 1673130] Re: qemu 2.7.0 receives SIGABRT in qemu_coroutine_enter() |
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Date: |
Wed, 15 Mar 2017 16:08:26 -0000 |
Third stack trace:
--------------------------------------------------------------------------
#0 0x00007f4d5ad6a067 in raise () from /lib/x86_64-linux-gnu/libc.so.6
#1 0x00007f4d5ad6b448 in abort () from /lib/x86_64-linux-gnu/libc.so.6
#2 0x0000562a4c582b6c in qemu_coroutine_enter (co=0x7f4b1bf0a900) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:113
#3 0x0000562a4c582e55 in qemu_co_queue_run_restart (co=0x7f4b1bf0a830) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#4 0x0000562a4c5829a9 in qemu_coroutine_enter (co=0x7f4b1bf0a830) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#5 0x0000562a4c582e74 in qemu_co_queue_run_restart (co=0x7f4b1bf0f4c0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#6 0x0000562a4c5829a9 in qemu_coroutine_enter (co=0x7f4b1bf0f4c0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#7 0x0000562a4c582e74 in qemu_co_queue_run_restart (co=0x7f4b17e07c40) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#8 0x0000562a4c5829a9 in qemu_coroutine_enter (co=0x7f4b17e07c40) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#9 0x0000562a4c582e74 in qemu_co_queue_run_restart (co=0x7f4b17e11420) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#10 0x0000562a4c5829a9 in qemu_coroutine_enter (co=0x7f4b17e11420) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#11 0x0000562a4c582e74 in qemu_co_queue_run_restart (co=0x7f4b17e18c30) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#12 0x0000562a4c5829a9 in qemu_coroutine_enter (co=0x7f4b17e18c30) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#13 0x0000562a4c582e74 in qemu_co_queue_run_restart (co=0x7f4b1bf07ea0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#14 0x0000562a4c5829a9 in qemu_coroutine_enter (co=0x7f4b1bf07ea0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#15 0x0000562a4c582e74 in qemu_co_queue_run_restart (co=0x7f4b1000c0c0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#16 0x0000562a4c5829a9 in qemu_coroutine_enter (co=0x7f4b1000c0c0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#17 0x0000562a4c582e74 in qemu_co_queue_run_restart (co=0x7f4b17e11b10) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#18 0x0000562a4c5829a9 in qemu_coroutine_enter (co=0x7f4b17e11b10) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#19 0x0000562a4c582e74 in qemu_co_queue_run_restart (co=0x7f4b17e10500) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#20 0x0000562a4c5829a9 in qemu_coroutine_enter (co=0x7f4b17e10500) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#21 0x0000562a4c582e74 in qemu_co_queue_run_restart (co=0x7f4b1bf0a610) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#22 0x0000562a4c5829a9 in qemu_coroutine_enter (co=0x7f4b1bf0a610) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#23 0x0000562a4c582e74 in qemu_co_queue_run_restart (co=0x7f4b17e12820) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#24 0x0000562a4c5829a9 in qemu_coroutine_enter (co=0x7f4b17e12820) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#25 0x0000562a4c582e74 in qemu_co_queue_run_restart (co=0x7f4b10002b10) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#26 0x0000562a4c5829a9 in qemu_coroutine_enter (co=0x7f4b10002b10) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#27 0x0000562a4c582e74 in qemu_co_queue_run_restart (co=0x7f4b1000bfb0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#28 0x0000562a4c5829a9 in qemu_coroutine_enter (co=0x7f4b1000bfb0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#29 0x0000562a4c582e74 in qemu_co_queue_run_restart (co=0x7f4b17e103f0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#30 0x0000562a4c5829a9 in qemu_coroutine_enter (co=0x7f4b17e103f0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#31 0x0000562a4c582e74 in qemu_co_queue_run_restart (co=0x7f4b17e078b0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#32 0x0000562a4c5829a9 in qemu_coroutine_enter (co=0x7f4b17e078b0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#33 0x0000562a4c582e74 in qemu_co_queue_run_restart (co=0x7f4adfe02b00) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#34 0x0000562a4c5829a9 in qemu_coroutine_enter (co=0x7f4adfe02b00) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#35 0x0000562a4c582e74 in qemu_co_queue_run_restart (co=0x7f4b15701ae0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#36 0x0000562a4c5829a9 in qemu_coroutine_enter (co=0x7f4b15701ae0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#37 0x0000562a4c582e74 in qemu_co_queue_run_restart (co=0x7f4b17e162f0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#38 0x0000562a4c5829a9 in qemu_coroutine_enter (co=0x7f4b17e162f0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#39 0x0000562a4c582e74 in qemu_co_queue_run_restart (co=0x7f4b10009fe0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#40 0x0000562a4c5829a9 in qemu_coroutine_enter (co=0x7f4b10009fe0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#41 0x0000562a4c582e74 in qemu_co_queue_run_restart (co=0x7f4b17e0b860) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#42 0x0000562a4c5829a9 in qemu_coroutine_enter (co=0x7f4b17e0b860) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#43 0x0000562a4c582e74 in qemu_co_queue_run_restart (co=0x7f4b23f035c0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#44 0x0000562a4c5829a9 in qemu_coroutine_enter (co=0x7f4b23f035c0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#45 0x0000562a4c582e74 in qemu_co_queue_run_restart (co=0x7f4b19e030c0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#46 0x0000562a4c5829a9 in qemu_coroutine_enter (co=0x7f4b19e030c0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#47 0x0000562a4c582e74 in qemu_co_queue_run_restart (co=0x7f4b100051b0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#48 0x0000562a4c5829a9 in qemu_coroutine_enter (co=0x7f4b100051b0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#49 0x0000562a4c582e74 in qemu_co_queue_run_restart (co=0x7f4adfe03970) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#50 0x0000562a4c5829a9 in qemu_coroutine_enter (co=0x7f4adfe03970) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#51 0x0000562a4c582e74 in qemu_co_queue_run_restart (co=0x7f4b17e11a00) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#52 0x0000562a4c5829a9 in qemu_coroutine_enter (co=0x7f4b17e11a00) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#53 0x0000562a4c582e74 in qemu_co_queue_run_restart (co=0x7f4b17e0e0a0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#54 0x0000562a4c5829a9 in qemu_coroutine_enter (co=0x7f4b17e0e0a0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#55 0x0000562a4c582e74 in qemu_co_queue_run_restart (co=0x7f4b17e0ede0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#56 0x0000562a4c5829a9 in qemu_coroutine_enter (co=0x7f4b17e0ede0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#57 0x0000562a4c582e74 in qemu_co_queue_run_restart (co=0x7f4aeff00860) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#58 0x0000562a4c5829a9 in qemu_coroutine_enter (co=0x7f4aeff00860) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
---Type <return> to continue, or q <return> to quit---
#59 0x0000562a4c582e74 in qemu_co_queue_run_restart (co=0x7f4b17e0d6f0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#60 0x0000562a4c5829a9 in qemu_coroutine_enter (co=0x7f4b17e0d6f0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#61 0x0000562a4c582e74 in qemu_co_queue_run_restart (co=0x7f4b17e0e490) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#62 0x0000562a4c5829a9 in qemu_coroutine_enter (co=0x7f4b17e0e490) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#63 0x0000562a4c582e74 in qemu_co_queue_run_restart (co=0x7f4b17e17370) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#64 0x0000562a4c5829a9 in qemu_coroutine_enter (co=0x7f4b17e17370) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#65 0x0000562a4c582e74 in qemu_co_queue_run_restart (co=0x7f4b17e15c40) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#66 0x0000562a4c5829a9 in qemu_coroutine_enter (co=0x7f4b17e15c40) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#67 0x0000562a4c582e74 in qemu_co_queue_run_restart (co=0x7f4b07f00a80) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#68 0x0000562a4c5829a9 in qemu_coroutine_enter (co=0x7f4b07f00a80) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#69 0x0000562a4c582e74 in qemu_co_queue_run_restart (co=0x7f4b15703250) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#70 0x0000562a4c5829a9 in qemu_coroutine_enter (co=0x7f4b15703250) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#71 0x0000562a4c582e74 in qemu_co_queue_run_restart (co=0x7f4b17e17870) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#72 0x0000562a4c5829a9 in qemu_coroutine_enter (co=0x7f4b17e17870) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#73 0x0000562a4c582e74 in qemu_co_queue_run_restart (co=0x7f4b15703140) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#74 0x0000562a4c5829a9 in qemu_coroutine_enter (co=0x7f4b15703140) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#75 0x0000562a4c582e74 in qemu_co_queue_run_restart (co=0x7f4b17e0c210) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#76 0x0000562a4c5829a9 in qemu_coroutine_enter (co=0x7f4b17e0c210) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#77 0x0000562a4c582e74 in qemu_co_queue_run_restart (co=0x7f4b17e08650) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#78 0x0000562a4c5829a9 in qemu_coroutine_enter (co=0x7f4b17e08650) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#79 0x0000562a4c582e74 in qemu_co_queue_run_restart (co=0x7f4b17e07470) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#80 0x0000562a4c5829a9 in qemu_coroutine_enter (co=0x7f4b17e07470) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#81 0x0000562a4c582e74 in qemu_co_queue_run_restart (co=0x7f4b15e03a10) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#82 0x0000562a4c5829a9 in qemu_coroutine_enter (co=0x7f4b15e03a10) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#83 0x0000562a4c582e74 in qemu_co_queue_run_restart (co=0x7f4b17e11d90) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#84 0x0000562a4c5829a9 in qemu_coroutine_enter (co=0x7f4b17e11d90) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#85 0x0000562a4c582e74 in qemu_co_queue_run_restart (co=0x7f4b17e13d00) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#86 0x0000562a4c5829a9 in qemu_coroutine_enter (co=0x7f4b17e13d00) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#87 0x0000562a4c582e74 in qemu_co_queue_run_restart (co=0x7f4afbe02b00) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#88 0x0000562a4c5829a9 in qemu_coroutine_enter (co=0x7f4afbe02b00) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#89 0x0000562a4c582fa0 in qemu_co_enter_next (address@hidden) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:106
#90 0x0000562a4c521060 in timer_cb (blk=0x562a4d8e6590, is_write=<optimized
out>) at /build/pb-qemu-pssKUp/pb-qemu-2.7.0/block/throttle-groups.c:400
#91 0x0000562a4c4de615 in timerlist_run_timers (timer_list=0x562a4d952d40) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/qemu-timer.c:528
#92 0x0000562a4c4de679 in timerlistgroup_run_timers (address@hidden) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/qemu-timer.c:564
#93 0x0000562a4c4def47 in aio_dispatch (address@hidden) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/aio-posix.c:357
#94 0x0000562a4c4df0e8 in aio_poll (ctx=0x562a4ecd0610, blocking=<optimized
out>) at /build/pb-qemu-pssKUp/pb-qemu-2.7.0/aio-posix.c:479
#95 0x0000562a4c340c79 in iothread_run (opaque=0x562a4ecd03c0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/iothread.c:46
#96 0x00007f4d5b0e80a4 in start_thread () from
/lib/x86_64-linux-gnu/libpthread.so.0
#97 0x00007f4d5ae1d62d in clone () from /lib/x86_64-linux-gnu/libc.so.6
--------------------------------------------------------------------------
Looking at the data:
--------------------------------------------------------------------------
(gdb) frame 2
#2 0x0000562a4c582b6c in qemu_coroutine_enter (co=0x7f4b1bf0a900) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:113
113 /build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c: No such file
or directory.
(gdb) print *co
$1 = {entry = 0x7f4d23f20198, entry_arg = 0x1, caller = 0x7f4d23f20178,
pool_next = {sle_next = 0x10}, co_queue_wakeup = {sqh_first = 0x7f4c605fb000,
sqh_last = 0x1000}, co_queue_next = {
sqe_next = 0x7f4c584f5000}}
(gdb) print *co->caller
$2 = {entry = 0x400400000001, entry_arg = 0x5000ac0, caller = 0x0, pool_next =
{sle_next = 0x0}, co_queue_wakeup = {sqh_first = 0x0, sqh_last =
0xffffea0005b1fec0}, co_queue_next = {sqe_next = 0x100000000000}}
(gdb) frame 4
#4 0x0000562a4c5829a9 in qemu_coroutine_enter (co=0x7f4b1bf0a830) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
119 in /build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c
(gdb) print *co
$5 = {entry = 0x7f4b180001d8, entry_arg = 0x7f4b180001d8, caller =
0x7f4b1bf0a8d8, pool_next = {sle_next = 0x7f4b1bf0a8e0}, co_queue_wakeup =
{sqh_first = 0x7f4c584f5000, sqh_last = 0x7f4b1bf0a910},
co_queue_next = {sqe_next = 0x5000ac0}}
(gdb) print *co->caller
$6 = {entry = 0x230120198, entry_arg = 0x230120178, caller = 0x16c7fb000,
pool_next = {sle_next = 0x1646f5000}, co_queue_wakeup = {sqh_first =
0x1718c2000, sqh_last = 0x7f4d23f20198}, co_queue_next = {
sqe_next = 0x1}}
--------------------------------------------------------------------------
Same thing.
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https://bugs.launchpad.net/bugs/1673130
Title:
qemu 2.7.0 receives SIGABRT in qemu_coroutine_enter()
Status in QEMU:
New
Bug description:
I've been experiencing frequent SIGABRTs (in addition to segfaults in
#1671876) lately with qemu 2.7.0 running Ubuntu 16.04 guests. The
crash usually happens in qemu_coroutine_enter(). I haven't seen this
so far with any other guests or distros.
Here is one stack trace I obtained
--------------------------------------------------------------------------
(gdb) bt
#0 0x00007fd7cc676067 in __GI_raise (address@hidden) at
../nptl/sysdeps/unix/sysv/linux/raise.c:56
#1 0x00007fd7cc677448 in __GI_abort () at abort.c:89
#2 0x0000556aed247b6c in qemu_coroutine_enter (co=0x7fd574300df0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:113
#3 0x0000556aed247e55 in qemu_co_queue_run_restart (co=0x7fd574300ce0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#4 0x0000556aed2479a9 in qemu_coroutine_enter (co=0x7fd574300ce0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#5 0x0000556aed247e74 in qemu_co_queue_run_restart (co=0x7fd589111670) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#6 0x0000556aed2479a9 in qemu_coroutine_enter (co=0x7fd589111670) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#7 0x0000556aed247e74 in qemu_co_queue_run_restart (co=0x7fd57430dba0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#8 0x0000556aed2479a9 in qemu_coroutine_enter (co=0x7fd57430dba0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#9 0x0000556aed247e74 in qemu_co_queue_run_restart (co=0x7fd589119130) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#10 0x0000556aed2479a9 in qemu_coroutine_enter (co=0x7fd589119130) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#11 0x0000556aed247e74 in qemu_co_queue_run_restart (co=0x7fd589117410) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#12 0x0000556aed2479a9 in qemu_coroutine_enter (co=0x7fd589117410) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#13 0x0000556aed247e74 in qemu_co_queue_run_restart (co=0x7fd577f00e00) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#14 0x0000556aed2479a9 in qemu_coroutine_enter (co=0x7fd577f00e00) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#15 0x0000556aed247fa0 in qemu_co_enter_next (address@hidden) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:106
#16 0x0000556aed1e6060 in timer_cb (blk=0x556aef34e590, is_write=<optimized
out>) at /build/pb-qemu-pssKUp/pb-qemu-2.7.0/block/throttle-groups.c:400
#17 0x0000556aed1a3615 in timerlist_run_timers (timer_list=0x556aef3bad40) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/qemu-timer.c:528
#18 0x0000556aed1a3679 in timerlistgroup_run_timers (address@hidden) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/qemu-timer.c:564
#19 0x0000556aed1a3f47 in aio_dispatch (address@hidden) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/aio-posix.c:357
#20 0x0000556aed1a40e8 in aio_poll (ctx=0x556af0738610, blocking=<optimized
out>) at /build/pb-qemu-pssKUp/pb-qemu-2.7.0/aio-posix.c:479
#21 0x0000556aed005c79 in iothread_run (opaque=0x556af07383c0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/iothread.c:46
#22 0x00007fd7cc9f40a4 in start_thread (arg=0x7fd7aafff700) at
pthread_create.c:403
#23 0x00007fd7cc72962d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:111
--------------------------------------------------------------------------
The code crashes here
--------------------------------------------------------------------------
void qemu_coroutine_enter(Coroutine *co)
{
Coroutine *self = qemu_coroutine_self();
CoroutineAction ret;
trace_qemu_coroutine_enter(self, co, co->entry_arg);
if (co->caller) {
fprintf(stderr, "Co-routine re-entered recursively\n");
abort(); <--- Code aborts here
}
[...]
}
--------------------------------------------------------------------------
Debugging further we see:
--------------------------------------------------------------------------
(gdb) frame 2
#2 0x0000556aed247b6c in qemu_coroutine_enter (co=0x7fd574300df0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:113
113 /build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c: No such
file or directory.
(gdb) print *co
$1 = {entry = 0x7fd793e95a58, entry_arg = 0x1, caller = 0x7fd793e95a38,
pool_next = {sle_next = 0x10}, co_queue_wakeup = {sqh_first = 0x7fd6ebbd2000,
sqh_last = 0x1000}, co_queue_next = {
sqe_next = 0x7fd6ebbd1000}}
(gdb) print *co->caller
$2 = {entry = 0x400400000001, entry_arg = 0xc546a20, caller = 0x0, pool_next
= {sle_next = 0x0}, co_queue_wakeup = {sqh_first = 0x0, sqh_last =
0xffffea00061f7480}, co_queue_next = {sqe_next = 0x100000000000}}
(gdb) frame 4
#4 0x0000556aed2479a9 in qemu_coroutine_enter (co=0x7fd574300ce0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
119 in /build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c
(gdb) print *co
$3 = {entry = 0xc00000053, entry_arg = 0x7fd500000001, caller =
0x7fd574300d88, pool_next = {sle_next = 0x7fd574300d90}, co_queue_wakeup =
{sqh_first = 0x7fd6ebbd1000, sqh_last = 0x7fd574300e00},
co_queue_next = {sqe_next = 0xc546a20}}
(gdb) print *co->caller
$4 = {entry = 0x230095a58, entry_arg = 0x230095a38, caller = 0x187dd2000,
pool_next = {sle_next = 0x187dd1000}, co_queue_wakeup = {sqh_first =
0x187dd0000, sqh_last = 0x187dcf000}, co_queue_next = {
sqe_next = 0x184970000}}
--------------------------------------------------------------------------
The question is, why did qemu_coroutine_enter not complain when in
earlier calls co->caller was not NULL?
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