Am 27.10.2013 07:54, schrieb Paolo Bonzini: > > I think the problem is that 0x20(%esp) gets somehow corrupted at the > instruction I highlighted with **. > > The simplest fix then would be to add a barrier() before and after > SwitchToFiber. > > Paolo
I added some debugging output (see code at http://qemu.weilnetz.de/test/coroutine-win32/). The result with pointer values replaced by function names is shown below. There are two threads (WinMain, qemu_tcg_cpu_thread_fn) and one coroutine (bdrv_rw_co_entry). Stefan qemu_coroutine_self:WinMain qemu_in_coroutine:WinMain,null qemu_coroutine_new:bdrv_rw_co_entry qemu_coroutine_create,co=bdrv_rw_co_entry qemu_coroutine_enter(bdrv_rw_co_entry,...),self=WinMain coroutine_swap(WinMain,bdrv_rw_co_entry) qemu_coroutine_yield,self=bdrv_rw_co_entry,to=WinMain coroutine_swap(bdrv_rw_co_entry,WinMain) qemu_coroutine_enter(bdrv_rw_co_entry,...),self=WinMain coroutine_swap(WinMain,bdrv_rw_co_entry) qemu_in_coroutine:bdrv_rw_co_entry,WinMain # active coroutine bdrv_rw_co_entry is deleted coroutine_delete(bdrv_rw_co_entry) qemu_coroutine_self:qemu_tcg_cpu_thread_fn qemu_in_coroutine:qemu_tcg_cpu_thread_fn,null qemu_coroutine_create,co=bdrv_rw_co_entry qemu_coroutine_enter(bdrv_rw_co_entry,...),self=qemu_tcg_cpu_thread_fn coroutine_swap(qemu_tcg_cpu_thread_fn,bdrv_rw_co_entry) qemu_coroutine_yield,self=bdrv_rw_co_entry,to=qemu_tcg_cpu_thread_fn coroutine_swap(bdrv_rw_co_entry,qemu_tcg_cpu_thread_fn) qemu_coroutine_enter(bdrv_rw_co_entry,...),self=qemu_tcg_cpu_thread_fn coroutine_swap(qemu_tcg_cpu_thread_fn,bdrv_rw_co_entry) qemu_in_coroutine:bdrv_rw_co_entry,qemu_tcg_cpu_thread_fn qemu_in_coroutine:bdrv_rw_co_entry,qemu_tcg_cpu_thread_fn # active coroutine bdrv_rw_co_entry is deleted coroutine_delete(bdrv_rw_co_entry) # now we are still in deleted coroutine bdrv_rw_co_entry qemu_in_coroutine:bdrv_rw_co_entry,null qemu_coroutine_create,co=bdrv_rw_co_entry qemu_coroutine_enter(bdrv_rw_co_entry,...),self=bdrv_rw_co_entry coroutine_swap(bdrv_rw_co_entry,bdrv_rw_co_entry) qemu_coroutine_yield,self=bdrv_rw_co_entry,to=bdrv_rw_co_entry coroutine_swap(bdrv_rw_co_entry,bdrv_rw_co_entry) qemu_in_coroutine:bdrv_rw_co_entry,null
