Re: [Qemu-devel] qemu assertion failed with usb on current git master!

[Gerd Hoffmann <kraxel@redhat.com>]

  Hi,

> I'm really sorry, but I don't understand what's happening - I copied the
> qemu executable on my target system before executing it, but gdb complains
> that the core file does not match the executable! But except the file paths
> they are identical.

> warning: core file may not match specified executable file.
> Core was generated by `/disc/qemu-system-x86_64 -machine kernel_irqchip=on
> -serial /dev/ttyS2 -usb -de'.
> Program terminated with signal 6, Aborted.
> #0  0xffffe424 in __kernel_vsyscall ()

Strange.  The backtrace is bogus too.

> I don't know how to proceed here.

Lets try plan b: add a printf right before the assert:

--- a/hw/usb.c
+++ b/hw/usb.c
@@ -356,6 +356,7 @@ void usb_packet_complete(USBDevice *dev, USBPacket *p)

     while (!QTAILQ_EMPTY(&ep->queue)) {
         p = QTAILQ_FIRST(&ep->queue);
+        fprintf(stderr, "%s: packet %p\n", __func__, p);
         assert(p->state == USB_PACKET_QUEUED);
         ret = usb_process_one(p);
         if (ret == USB_RET_ASYNC) {


> Don't you run into this problem (crash on USB plug in) on your system?
> I tested it with a Linux guest, there it does not crash! Only with a
> Windows XP guest!

I test with Linux most of the time, but even with windows xp guest it
doesn't reproduce here.

cheers,
  Gerd