Re: [Qemu-devel] system_reset command cause assert failed

[Roy Tam]

2010/2/1 Luiz Capitulino <address@hidden>:
> On Mon, 1 Feb 2010 20:36:22 +0800
> Roy Tam <address@hidden> wrote:
>
>> 2010/2/1 Luiz Capitulino <address@hidden>:
>> > On Sun, 31 Jan 2010 16:28:42 +0800
>> > Roy Tam <address@hidden> wrote:
>> >
>> >> Dear all,
>> >>
>> >> In latest git revision, when guest OS restarts or system_reset command
>> >> issues from monitor console, it asserts failed:
>> >> Assertion failed: obj != NULL, file C:/msys/home/User/qemu/monitor.c, 
>> >> line 338
>> >
>> >  Hm, I can't reproduce this on Linux. Can you, please provide a backtrace 
>> > and
>> > your git HEAD?
>> >
>>
>> my environment:
>> Windows XP SP3
>> gcc version 3.4.5 (mingw-vista special r3)
>> GNU Binutils 2.19.1
>> GNU Make 3.81
>>
>> QEMU git rev 059bca46bbfd7f16cd2ccca631b91334e08d9abb
>> config: ./configure --target-list="i386-softmmu x86_64-softmmu
>> mips64el-softmmu" --audio-drv-list=sdl
>> --audio-card-list=ac97,sb16,adlib --disable-linux-aio
>
>  Still no fun. It's possible that there's something windows-specific
> that makes qobject_from_jsonf() return NULL.
>
>  Without a backtrace my only option is to install windows on
> some machine here and try to reproduce the problem, but this will take
> some time.
>

gdb step-in trace:

(gdb) run
Starting program: C:\msys\home\User\qemu\i386-softmmu/qemu.exe -L ../pc-bios/
[New Thread 776.0xbcc]
[New Thread 776.0xa30]

Breakpoint 1, monitor_protocol_event (event=???, data=???)
    at C:/msys/home/User/qemu/monitor.c:331
331         err = qemu_gettimeofday(&tv);
(gdb) next
386         qmp = qdict_new();
(gdb)
331         err = qemu_gettimeofday(&tv);
(gdb)
qemu_gettimeofday (tp=???) at osdep.c:169
169     {
(gdb)
175       if(tp)
(gdb)
177           GetSystemTimeAsFileTime (&_now.ft);
(gdb)
0x005e671c in address@hidden ()
(gdb)
Single stepping until exit from function address@hidden,
which has no line number information.
0x7c8017e9 in KERNEL32!GetSystemTimeAsFileTime ()
   from C:\WINDOWS\system32\kernel32.dll
(gdb)
Single stepping until exit from function KERNEL32!GetSystemTimeAsFileTime,
which has no line number information.
qemu_gettimeofday (tp=???) at osdep.c:178
178           tp->tv_usec=(long)((_now.ns100 / 10ULL) % 1000000ULL );
(gdb)
0x005e0db4 in __udivdi3 ()
(gdb)
Single stepping until exit from function __udivdi3,
which has no line number information.
0x005e0ee4 in __umoddi3 ()
(gdb)
Single stepping until exit from function __umoddi3,
which has no line number information.
qemu_gettimeofday (tp=???) at osdep.c:179
179           tp->tv_sec= (long)((_now.ns100 - _W32_FT_OFFSET) / 10000000ULL);
(gdb)
0x005e0db4 in __udivdi3 ()
(gdb)
Single stepping until exit from function __udivdi3,
which has no line number information.
qemu_gettimeofday (tp=???) at osdep.c:184
184     }
(gdb)
monitor_protocol_event (event=???, data=???)
    at C:/msys/home/User/qemu/monitor.c:332
332         if (err < 0)
(gdb)
335         obj = qobject_from_jsonf("{ 'seconds': %" PRId64 ", "
(gdb)
qobject_from_jsonf (string=???) at qjson.c:57
57      {
(gdb)
39          JSONParsingState state = {};
(gdb)
57      {
(gdb)
39          JSONParsingState state = {};
(gdb)
57      {
(gdb)
61          va_start(ap, string);
(gdb)
39          JSONParsingState state = {};
(gdb)
61          va_start(ap, string);
(gdb)
41          state.ap = ap;
(gdb)
39          JSONParsingState state = {};
(gdb)
41          state.ap = ap;
(gdb)
43          json_message_parser_init(&state.parser, parse_json);
(gdb)
json_message_parser_init (parser=???, func=???) at json-streamer.c:64
64      {
(gdb)
65          parser->emit = func;
(gdb)
66          parser->brace_count = 0;
(gdb)
65          parser->emit = func;
(gdb)
67          parser->bracket_count = 0;
(gdb)
68          parser->tokens = qlist_new();
(gdb)
qlist_new () at qlist.c:30
30      {
(gdb)
33          qlist = qemu_malloc(sizeof(*qlist));
(gdb)
qemu_malloc (size=???) at qemu-malloc.c:55
55      {
(gdb)
56          if (!size && !allow_zero_malloc()) {
(gdb)
28      {
(gdb)
0x005e654c in malloc ()
(gdb)
Single stepping until exit from function malloc,
which has no line number information.
0x77bfc407 in msvcrt!malloc () from C:\WINDOWS\system32\msvcrt.dll
(gdb)
Single stepping until exit from function msvcrt!malloc,
which has no line number information.
0x77bfc3d4 in msvcrt!free () from C:\WINDOWS\system32\msvcrt.dll
(gdb)
Single stepping until exit from function msvcrt!free,
which has no line number information.
0x77c07420 in strerror () from C:\WINDOWS\system32\msvcrt.dll
(gdb)
Single stepping until exit from function strerror,
which has no line number information.
0x77bfc2f5 in msvcrt!free () from C:\WINDOWS\system32\msvcrt.dll
(gdb)
Single stepping until exit from function msvcrt!free,
which has no line number information.
0x7c9300c4 in ntdll!RtlAppendStringToString ()
   from C:\WINDOWS\system32\ntdll.dll
(gdb)
Single stepping until exit from function ntdll!RtlAppendStringToString,
which has no line number information.
0x7c92e8cb in strchr () from C:\WINDOWS\system32\ntdll.dll
(gdb)
Single stepping until exit from function strchr,
which has no line number information.
0x7c9300d3 in ntdll!RtlAppendStringToString ()
   from C:\WINDOWS\system32\ntdll.dll
(gdb)
Single stepping until exit from function ntdll!RtlAppendStringToString,
which has no line number information.
0x7c938f15 in ntdll!RtlDuplicateUnicodeString ()
   from C:\WINDOWS\system32\ntdll.dll
(gdb)
Single stepping until exit from function ntdll!RtlDuplicateUnicodeString,
which has no line number information.
Assertion failed: obj != NULL, file C:/msys/home/User/qemu/monitor.c, line 338

This application has requested the Runtime to terminate it in an unusual way.
Please contact the application's support team for more information.

Program exited with code 03.
(gdb)