Re: [Qemu-devel] [PATCH 0/2] Fix wide ioport access cracking

[Gerhard Wiesinger <lists@wiesinger.com>]

On Thu, 11 Aug 2011, Avi Kivity wrote:
> Or maybe it's just -O2 screwing up debug information.  Please change 
> ./configure to set -O1 and redo.
>
> Please print *r.memory as well.

./configure --target-list=x86_64-softmmu,i386-softmmu --enable-debug
Rest below.

Ciao,
Gerhard

--
http://www.wiesinger.com/

(gdb) bt
#0  0x0000003a060328f5 in raise () from /lib64/libc.so.6
#1  0x0000003a060340d5 in abort () from /lib64/libc.so.6
#2  0x0000003a0602b8b5 in __assert_fail () from /lib64/libc.so.6
#3  0x0000000000447ace in memory_region_del_subregion (mr=0x20002c802f0, subregion=0x2de0000)
     at /root/download/qemu/git/qemu-kvm-test/memory.c:1168
#4  0x0000000000427671 in pci_update_mappings (d=0x2de8b80) at /root/download/qemu/git/qemu-kvm-test/hw/pci.c:1134
#5  0x0000000000427a7a in pci_default_write_config (d=0x2de8b80, addr=4, val=0, l=2) at /root/download/qemu/git/qemu-kvm-test/hw/pci.c:1213
#6  0x00000000005c33bf in pci_host_config_write_common (pci_dev=0x2de8b80, addr=4, limit=256, val=7, len=2)
     at /root/download/qemu/git/qemu-kvm-test/hw/pci_host.c:54
#7  0x00000000005c34d1 in pci_data_write (s=0x2cafb10, addr=2147489796, val=7, len=2)
     at /root/download/qemu/git/qemu-kvm-test/hw/pci_host.c:75
#8  0x00000000005c36b1 in pci_host_data_write (handler=0x2cafae0, addr=3324, val=7, len=2)
     at /root/download/qemu/git/qemu-kvm-test/hw/pci_host.c:125
#9  0x000000000043937c in ioport_simple_writew (opaque=0x2cafae0, addr=3324, value=7) at /root/download/qemu/git/qemu-kvm-test/rwhandler.c:50
#10 0x00000000004a82f5 in ioport_write (index=1, address=3324, data=7) at ioport.c:81
#11 0x00000000004a8d51 in cpu_outw (addr=3324, val=7) at ioport.c:280
#12 0x0000000000441066 in kvm_handle_io (port=3324, data=0x7f58b0304000, direction=1, size=2, count=1)
     at /root/download/qemu/git/qemu-kvm-test/kvm-all.c:858
#13 0x00000000004415d1 in kvm_cpu_exec (env=0x2c89b00) at /root/download/qemu/git/qemu-kvm-test/kvm-all.c:997
#14 0x000000000040bddf in qemu_kvm_cpu_thread_fn (arg=0x2c89b00) at /root/download/qemu/git/qemu-kvm-test/cpus.c:806
#15 0x0000003a06807761 in start_thread () from /lib64/libpthread.so.0
#16 0x0000003a060e098d in clone () from /lib64/libc.so.6
(gdb) frame 4
#4  0x0000000000427671 in pci_update_mappings (d=0x2de8b80) at /root/download/qemu/git/qemu-kvm-test/hw/pci.c:1134
1134                memory_region_del_subregion(r->address_space, r->memory);
(gdb) print i
$1 = 0
(gdb) print *r
$2 = {addr = 22058952032257, size = 32, filtered_size = 171717340864446496, type = 1 '\001', memory = 0x2de0000, address_space =
     0x20002c802f0}
(gdb) print d->io_regions[0]
$3 = {addr = 22058952032257, size = 32, filtered_size = 171717340864446496, type = 1 '\001', memory = 0x2de0000, address_space =
     0x20002c802f0}
(gdb) print d->io_regions[1]
$4 = {addr = 17113088, size = 32, filtered_size = 32, type = 0 '\000', memory = 0x2de9188, address_space = 0x2c80000}
(gdb) print d->io_regions[2]
$5 = {addr = 0, size = 0, filtered_size = 0, type = 0 '\000', memory = 0x0, address_space = 0x0}
(gdb) print d->io_regions[3]
$6 = {addr = 0, size = 0, filtered_size = 0, type = 207 '\317', memory = 0x0, address_space = 0x0}
(gdb) print d->io_regions[4]
$7 = {addr = 0, size = 0, filtered_size = 0, type = 0 '\000', memory = 0x0, address_space = 0x0}
(gdb) print d->io_regions[5]
$8 = {addr = 0, size = 0, filtered_size = 0, type = 0 '\000', memory = 0x0, address_space = 0x0}
(gdb) print d->io_regions[6]
$9 = {addr = 0, size = 0, filtered_size = 0, type = 0 '\000', memory = 0x0, address_space = 0x0}
(gdb) print *r.memory
$10 = {ops = 0x615f646e6573000a, opaque = 0x646d635f69706174, parent = 0x2064616572203a20, size = 8297917989298270821, addr =
     3469246654059929972, offset = 2683426788631148594, backend_registered = 48, ram_addr = 7597679723851768942, iorange = {ops =
     0x44203a20646d635f, base = 8295758535554257234, len = 8386112019083850853}, terminates = 117, alias = 0x6d635f627375000a, alias_offset =
     7575161725715242852, priority = 1881488740, may_overlap = 32, subregions = {tqh_first = 0x6f632064253d6574, tqh_last =
     0x622064253d746e75}, subregions_link = {tqe_next = 0x6675622064253d73, tqe_prev = 0x425355000a70253d}, coalesced = {tqh_first =
     0x696d736e61727420, tqh_last = 0x6166206e6f697373}, name = 0x7473000a64656c69 <Address 0x7473000a64656c69 out of bounds>,
   dirty_log_mask = 117 'u', ioeventfd_nb = 1680161395, ioeventfds = 0x5f6b736964000a3a}