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Date: Wed, 24 Oct 2012 09:15:32 +1000
From: Richard Henderson <rth@twiddle.net>
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Subject: [Qemu-devel] [memory] abort with head a8170e5
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To: avi@redhat.com
Cc: qemu-devel@nongnu.org

qemu-system-sparc64: /home/rth/work/qemu/qemu/memory.c:1022: memory_region_destroy: Assertion `memory_region_transaction_depth == 0' failed.

Program received signal SIGABRT, Aborted.
0x00007ffff5234925 in raise () from /lib64/libc.so.6
(gdb) where
#0  0x00007ffff5234925 in raise () from /lib64/libc.so.6
#1  0x00007ffff52360d8 in abort () from /lib64/libc.so.6
#2  0x00007ffff522d6a2 in __assert_fail_base () from /lib64/libc.so.6
#3  0x00007ffff522d752 in __assert_fail () from /lib64/libc.so.6
#4  0x000055555576ebe4 in memory_region_destroy (mr=0x555556a76f60)
    at /home/rth/work/qemu/qemu/memory.c:1022
#5  0x0000555555674729 in pci_bridge_cleanup_alias (
    parent_space=<optimized out>, alias=0x555556a76f60)
    at /home/rth/work/qemu/qemu/hw/pci_bridge.c:158
#6  pci_bridge_region_cleanup (br=0x555556a75d30)
    at /home/rth/work/qemu/qemu/hw/pci_bridge.c:190
#7  0x0000555555674ccb in pci_bridge_update_mappings (br=0x555556a75d30)
    at /home/rth/work/qemu/qemu/hw/pci_bridge.c:203
#8  pci_bridge_write_config (d=0x555556a75d30, address=<optimized out>, 
    val=<optimized out>, len=<optimized out>)
    at /home/rth/work/qemu/qemu/hw/pci_bridge.c:226
#9  0x000055555576b072 in access_with_adjusted_size (addr=addr@entry=2052, 
    value=value@entry=0x7fffedaee890, size=size@entry=2, 
    access_size_min=<optimized out>, access_size_max=<optimized out>, 
    access=access@entry=0x55555576b690 <memory_region_write_accessor>, 
    opaque=opaque@entry=0x555556a65a38)
    at /home/rth/work/qemu/qemu/memory.c:363
#10 0x0000555555770183 in memory_region_dispatch_write (size=2, data=768, addr=
    2052, mr=0x555556a65a38) at /home/rth/work/qemu/qemu/memory.c:914
#11 io_mem_write (mr=0x555556a65a38, addr=2052, val=<optimized out>, size=2)
    at /home/rth/work/qemu/qemu/memory.c:1570
#12 0x00007ffff011cd3e in code_gen_buffer ()

This can be seen with the distributed OpenBIOS, i.e. no special options needed:

  ./sparc64-softmmu/qemu-system-sparc64


r~