With current git master, does the bug still occur if you add '--with- coroutine=sigaltstack' to your configure line?
-- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1087590 Title: gdbstub step instruction locks up on OS X Status in QEMU: New Bug description: OS X 10.8.2 (Darwin Niels-MacBook-Air.local 12.2.0 Darwin Kernel Version 12.2.0: Sat Aug 25 00:48:52 PDT 2012; root:xnu-2050.18.24~1/RELEASE_X86_64 x86_64) -Only seems to occur with a drive attached -To reproduce (from current git master): ./configure --cc=clang --enable-debug --disable-user --target-list=i386-softmmu i386-softmmu/qemu-system-i386 -drive file=~/tmp.qcow2,index=0,media=disk -s -S #wait several seconds gdb target remote localhost:1234 si #qemu locks up, requires kill -9 -Bisected it to: commit 47e6b251a5e9a47c406f2f2c0b01bb88854c98ec Author: Paolo Bonzini <pbonz...@redhat.com> Date: Thu May 24 18:03:13 2012 +0200 block: switch posix-aio-compat to threadpool This is not meant for portability, but to remove code duplication. Signed-off-by: Paolo Bonzini <pbonz...@redhat.com> (cherry picking 1f001dc7bc9e435bf231a5b0edcad1c7c2bd6214, c166cb72f1676855816340666c3b618beef4b976 and 1d8ddda045b4b72dc95a325debb6df0fc19ec821 as needed to keep it building, which was kinda dodgy). -Trackback while locked up: Thread 9 (process 49143): #0 0x00007fff93dcd0fa in __psynch_cvwait () #1 0x00007fff931c0f89 in _pthread_cond_wait () #2 0x0000000100202363 in qemu_sem_timedwait (sem=0x1009a6678, ms=10000) at qemu-thread-posix.c:214 #3 0x000000010023017e in worker_thread (unused=0x0) at thread-pool.c:88 #4 0x00007fff931bc742 in _pthread_start () #5 0x00007fff931a9181 in thread_start () Thread 8 (process 49143): #0 0x00007fff93dcd0fa in __psynch_cvwait () #1 0x00007fff931c0f89 in _pthread_cond_wait () #2 0x0000000100ffab83 in g_cond_wait () #3 0x0000000100074aa5 in coroutine_wait_runnable_locked (co=0x1032361d0) at coroutine-gthread.c:133 #4 0x00000001000749fe in qemu_coroutine_switch (from_=0x1032361d0, to_=0x103024200, action=COROUTINE_YIELD) at coroutine-gthread.c:191 #5 0x00000001001f8fbc in coroutine_swap (from=0x1032361d0, to=0x103024200) at qemu-coroutine.c:31 #6 0x00000001001f90b5 in qemu_coroutine_yield () at qemu-coroutine.c:74 #7 0x0000000100024238 in bdrv_co_flush (bs=0x104007c00) at block.c:4023 #8 0x00000001000244ae in bdrv_flush_co_entry (opaque=0x103480d80) at block.c:3987 #9 0x000000010001d142 in bdrv_flush (bs=0x104007c00) at block.c:4086 #10 0x000000010003554a in qcow2_cache_flush (bs=0x10281e600, c=0x10183cd60) at block/qcow2-cache.c:151 #11 0x0000000100041f69 in qcow2_co_flush_to_os (bs=0x10281e600) at block/qcow2.c:1559 #12 0x000000010002415a in bdrv_co_flush (bs=0x10281e600) at block.c:4000 #13 0x00000001000244ae in bdrv_flush_co_entry (opaque=0x7fff5fbfe320) at block.c:3987 #14 0x00000001000748a2 in coroutine_thread (opaque=0x1032361d0) at coroutine-gthread.c:150 #15 0x0000000100fdf8fa in g_thread_proxy () #16 0x00007fff931bc742 in _pthread_start () #17 0x00007fff931a9181 in thread_start () Thread 7 (process 49143): #0 0x00007fff93dcd122 in __psynch_mutexwait () #1 0x00007fff931c1d9d in pthread_mutex_lock () #2 0x00007fff931c1017 in _pthread_cond_wait () #3 0x000000010020205b in qemu_cond_wait (cond=0x10322db90, mutex=0x1009b6640) at qemu-thread-posix.c:116 #4 0x000000010027770a in qemu_tcg_wait_io_event () at cpus.c:708 #5 0x000000010027747b in qemu_tcg_cpu_thread_fn (arg=0x10381d200) at cpus.c:845 #6 0x00007fff931bc742 in _pthread_start () #7 0x00007fff931a9181 in thread_start () Thread 6 (process 49143): #0 0x00007fff93dcd57a in __sigwait () #1 0x00007fff93246e4d in sigwait () #2 0x000000010006eca9 in sigwait_compat (opaque=0x101c253a0) at compatfd.c:40 #3 0x00007fff931bc742 in _pthread_start () #4 0x00007fff931a9181 in thread_start () Thread 3 (process 49143): #0 0x00007fff93dcdd16 in kevent () #1 0x00007fff8bb78dea in _dispatch_mgr_invoke () #2 0x00007fff8bb789ee in _dispatch_mgr_thread () Thread 1 (process 49143): #0 0x00007fff93dcd322 in select$DARWIN_EXTSN () #1 0x0000000100004a50 in aio_poll (ctx=0x101c253f0, blocking=true) at aio-posix.c:230 #2 0x00000001001bb857 in qemu_aio_wait () at main-loop.c:449 #3 0x000000010001d181 in bdrv_flush (bs=0x10281e600) at block.c:4091 #4 0x0000000100020fc8 in bdrv_flush_all () at block.c:2685 #5 0x0000000100276642 in do_vm_stop (state=RUN_STATE_DEBUG) at cpus.c:446 #6 0x00000001002765c5 in vm_stop (state=RUN_STATE_DEBUG) at cpus.c:1078 #7 0x000000010026e850 in main_loop_should_exit () at vl.c:1718 #8 0x000000010026e77c in main_loop () at vl.c:1774 #9 0x0000000100268eed in qemu_main (argc=9, argv=0x7fff5fbffa40, envp=0x7fff5fbffa90) at vl.c:3999 #10 0x0000000100234509 in -[QemuCocoaAppController startEmulationWithArgc:argv:] (self=0x101804a90, _cmd=0x1003c7f05, argc=9, argv=0x7fff5fbffa40) at ui/cocoa.m:798 #11 0x0000000100234421 in -[QemuCocoaAppController applicationDidFinishLaunching:] (self=0x101804a90, _cmd=0x7fff93597f79, note=0x101c218f0) at ui/cocoa.m:776 #12 0x00007fff952f647a in _CFXNotificationPost () #13 0x00007fff959f0846 in -[NSNotificationCenter postNotificationName:object:userInfo:] () #14 0x00007fff8cc6560d in -[NSApplication _postDidFinishNotification] () #15 0x00007fff8cc65346 in -[NSApplication _sendFinishLaunchingNotification] () #16 0x00007fff8cc62532 in -[NSApplication(NSAppleEventHandling) _handleAEOpenEvent:] () #17 0x00007fff8cc6212c in -[NSApplication(NSAppleEventHandling) _handleCoreEvent:withReplyEvent:] () #18 0x00007fff95a0a12b in -[NSAppleEventManager dispatchRawAppleEvent:withRawReply:handlerRefCon:] () #19 0x00007fff95a09f8d in _NSAppleEventManagerGenericHandler () #20 0x00007fff8bc2cb48 in aeDispatchAppleEvent () #21 0x00007fff8bc2c9a9 in dispatchEventAndSendReply () #22 0x00007fff8bc2c869 in aeProcessAppleEvent () #23 0x00007fff9609d8e9 in AEProcessAppleEvent () #24 0x00007fff8cc5e916 in _DPSNextEvent () #25 0x00007fff8cc5ded2 in -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] () #26 0x00007fff8cc55283 in -[NSApplication run] () #27 0x00000001002353f6 in main (argc=9, argv=0x7fff5fbffa40) at ui/cocoa.m:946 To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1087590/+subscriptions
