Re: emacs 23.0.60.1 built today (11th feb 2008) crashes under Vista

[Eric Lilja <mindcooler@gmail.com>]

Eli Zaretskii wrote:
>> From: Eric Lilja <mindcooler@gmail.com>
>> Date: Sat, 16 Feb 2008 23:10:23 +0100
>>
>> Eli Zaretskii wrote:
>>>> Date: Thu, 14 Feb 2008 23:44:36 +0200
>>>> From: Eli Zaretskii <eliz@gnu.org>
>>>> Cc: emacs-devel@gnu.org
>>>>
>>>> Thanks, I will try to fix w32.c when I have time, hopefully soon.
>>> Could you please try again with the latest version in CVS?
>>>
>>>
>>>
>> Still crashes I'm afraid.
> 
> Hmm... there's something I'm missing here, obviously.
> 
> Could you please again step through the call to
> get_sid_sub_authority_count, and print the value of pSid at each step?
> The command "display/x pSid" should do that; please type this command
> as soon as you step into get_sid_sub_authority_count, and then
> continue with the "next" command until the crash.  I also need the to
> see value of user_token.User.Sid inside init_user_info, immediately
> before the call to get_sid_sub_authority_count.
> 
> Thanks, and sorry for the mess.
> 
> 
> 

As you know, I'm not very good at gdb. I had some problems when 
debugging this (and here I'm refering to the "Cannot find bounds of 
current function", see below). Hope this log helps, if not, I can 
attempt to redo it in a proper way, with your guidance.


$ gdb ./oo-spd/i386/emacs.exe
GNU gdb 6.5.50.20060706-cvs (cygwin-special)
Copyright (C) 2006 Free Software Foundation, Inc.
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conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "i686-pc-cygwin"...
Environment variable "DISPLAY" not defined.
TERM = cygwin
Breakpoint 1 at 0x114b0c4: file w32fns.c, line 9317.
Breakpoint 2 at 0x10a0434: file sysdep.c, line 1319.
(gdb) break init_user_info
Breakpoint 3 at 0x1080f9c: file w32.c, line 599.
(gdb) run -Q
Starting program: /home/mindcooler/emacs/src/oo-spd/i386/emacs.exe -Q
Loaded symbols for /cygdrive/c/Windows/system32/ntdll.dll
Loaded symbols for /cygdrive/c/Windows/system32/kernel32.dll
Loaded symbols for /cygdrive/c/Windows/system32/msvcrt.dll
Loaded symbols for /cygdrive/c/Windows/system32/advapi32.dll
Loaded symbols for /cygdrive/c/Windows/system32/rpcrt4.dll
Loaded symbols for 
/cygdrive/c/Windows/WinSxS/x86_microsoft.windows.common-controls_6595b64144ccf1df_6.0.6000.16386_none_5d07289e07e1d100/comctl32.dll
Loaded symbols for /cygdrive/c/Windows/system32/gdi32.dll
Loaded symbols for /cygdrive/c/Windows/system32/user32.dll
Loaded symbols for /cygdrive/c/Windows/system32/shlwapi.dll
Loaded symbols for /cygdrive/c/Windows/system32/comdlg32.dll
Loaded symbols for /cygdrive/c/Windows/system32/shell32.dll
Loaded symbols for /cygdrive/c/Windows/system32/mpr.dll
Loaded symbols for /cygdrive/c/Windows/system32/ole32.dll
Loaded symbols for /cygdrive/c/Windows/system32/winmm.dll
Loaded symbols for /cygdrive/c/Windows/system32/oleaut32.dll
Loaded symbols for /cygdrive/c/Windows/system32/oleacc.dll
Loaded symbols for /cygdrive/c/Windows/system32/winspool.drv

Breakpoint 3, init_user_info () at w32.c:599
599       DWORD        length = sizeof (name), dlength = sizeof 
(domain), trash;
(gdb) n
600       HANDLE       token = NULL;
(gdb) n
606       if (open_process_token (GetCurrentProcess (), TOKEN_QUERY, &token)
(gdb) n
613           strcpy (the_passwd.pw_name, name);
(gdb) s
615           if (stricmp ("administrator", name) == 0)
(gdb) s
624               DWORD n_subauthorities =
(gdb) print user_token.User.Sid
$1 = (PSID) 0x82ea68
(gdb) s
get_sid_sub_authority_count (pSid=0x82ea68) at w32.c:389
389     {
(gdb) display/x pSid
1: /x pSid = 0x82f270
(gdb) n
393       if (is_windows_9x () == TRUE)
1: /x pSid = 0x82ea68
(gdb) n
397       if (g_b_init_get_sid_sub_authority_count == 0)
1: /x pSid = 0x82ea68
(gdb) n
405       if (s_pfn_Get_Sid_Sub_Authority_Count == NULL)
1: /x pSid = 0x82ea68
(gdb) n
409       return (s_pfn_Get_Sid_Sub_Authority_Count (pSid));
1: /x pSid = 0x82ea68
(gdb) n
410     }
1: /x pSid = 0x82ea68
(gdb) n
get_sid_sub_authority_count (pSid=0x0) at w32.c:409
409       return (s_pfn_Get_Sid_Sub_Authority_Count (pSid));
1: /x pSid = 0x82f270
(gdb) n
0x77df986b in ?? ()
(gdb) n
Cannot find bounds of current function
(gdb) n
Cannot find bounds of current function
(gdb) n
Cannot find bounds of current function
(gdb) s
Cannot find bounds of current function
(gdb) step out
No symbol "out" in current context.
(gdb) n
Cannot find bounds of current function
(gdb) continue
Continuing.

Program received signal SIGSEGV, Segmentation fault.
0x77df986b in ?? ()
(gdb) bt
#0  0x77df986b in ?? ()
#1  0x010811cd in init_user_info () at w32.c:624
#2  0x010839b0 in init_environment (argv=0x922960) at w32.c:1303
#3  0x0100260e in main (argc=2, argv=0x922960) at emacs.c:1506
(gdb)

This was with a fresh checkout performed just an hour ago.

- Eric