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Debug a DLL with Python

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oBFusCATed:
You have to post the full log from the debugger.

simbalsyd:
I think that was everything in the Debug log window but today the last line in the debug log says:

   In ntdll!KiIntSystemCall () (C:\WINDOWS\system32\ntdll.dll)

Maybe the content in the Disassembly window can say something. Here it is:


7C9520EC   push   $0x8
7C9520EE   push   $0x7c952138
7C9520F3   call   0x7c90e8cb <strchr+190>
7C9520F8   mov    %fs:0x18,%eax
7C9520FE   mov    0x30(%eax),%eax
7C952101   cmpb   $0x0,0x2(%eax)
7C952105   jne    0x7c952110 <ntdll!KiIntSystemCall+36>
7C952107   testb  $0x2,0x7ffe02d4
7C95210E   je     0x7c952130 <ntdll!KiIntSystemCall+68>
7C952110   andl   $0x0,-0x4(%ebp)
7C952114   call   0x7c90120e <ntdll!DbgUiConnectToDbg>
7C952119   jmp    0x7c95212c <ntdll!KiIntSystemCall+64>
7C95211B   nop
7C95211C   nop
7C95211D   nop
7C95211E   nop
7C95211F   nop
7C952120   xor    %eax,%eax
7C952122   inc    %eax
7C952123   ret
7C952124   nop
7C952125   nop
7C952126   nop
7C952127   nop
7C952128   nop
7C952129   mov    -0x18(%ebp),%esp
7C95212C   orl    $0xffffffff,-0x4(%ebp)
7C952130   push   $0x0
7C952132   call   0x7c9640cb <ntdll!RtlExtendedLargeIntegerDivide>
7C952137   nop
7C952138   (bad)
7C952139   (bad)
7C95213A   (bad)
7C95213B   jmp    *(%eax)
7C95213D   and    %edx,-0x6aded684(%ebp)
7C952143   jl     0x7c9520d5 <ntdll!KiUserApcDispatcher+11>
7C952145   nop
7C952146   nop
7C952147   nop
7C952148   nop


/Anders

oBFusCATed:
Doesn't help. Paste the full log. See the settings for details how to enable it.

simbalsyd:
I found the setting. This is the result:


Command-line: C:\MinGW\bin\gdb.exe -nx -fullname  -quiet -pid=6500
Working dir : Q:\AK96\Tools\ufs\unittests\dll\
> set prompt >>>>>>cb_gdb:
Attaching to process 6500
[New Thread 6500.0x1b48]
[New Thread 6500.0x16c4]
Reading symbols from C:\Python27\python.exe...(no debugging symbols found)...done.
[Switching to Thread 6500.0x16c4]
(gdb) >>>>>>cb_gdb:
> show version
GNU gdb (GDB) 7.2
Copyright (C) 2010 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "mingw32".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
>>>>>>cb_gdb:
> set confirm off
>>>>>>cb_gdb:
> set width 0
>>>>>>cb_gdb:
> set height 0
>>>>>>cb_gdb:
> set breakpoint pending on
>>>>>>cb_gdb:
> set print asm-demangle on
>>>>>>cb_gdb:
> set unwindonsignal on
>>>>>>cb_gdb:
> set debugevents on
>>>>>>cb_gdb:
> set disassembly-flavor att
>>>>>>cb_gdb:
> catch throw
Catchpoint 1 (throw)
>>>>>>cb_gdb:
> source C:\Program Files\CodeBlocks\share\codeblocks/scripts/stl-views-1.0.3.gdb
>>>>>>cb_gdb:
> run
ContinueDebugEvent (cpid=6500, ctid=16c4, DBG_CONTINUE);
ContinueDebugEvent (cpid=6500, ctid=1b48, DBG_CONTINUE);
ContinueDebugEvent (cpid=6500, ctid=16c4, DBG_CONTINUE);
gdb: windows_close, inferior_ptid=6500
gdb: windows_init_thread_list
[New Thread 3940.0x4e8]
Program received signal SIGSEGV, Segmentation fault.
0x7c919af2 in ntdll!RtlpWaitForCriticalSection () from C:\WINDOWS\system32\ntdll.dll
>>>>>>cb_gdb:
> set debugevents off
>>>>>>cb_gdb:
> bt 30
#0  0x7c919af2 in ntdll!RtlpWaitForCriticalSection () from C:\WINDOWS\system32\ntdll.dll
#1  0x7c901046 in ntdll!RtlEnumerateGenericTableLikeADirectory () from C:\WINDOWS\system32\ntdll.dll
#2  0x00e461a0 in ?? ()
#3  0x77dd6cf8 in RegCloseKey () from C:\WINDOWS\system32\advapi32.dll
#4  0x77dd78e4 in RegOpenKeyExA () from C:\WINDOWS\system32\advapi32.dll
#5  0x622915bb in ?? () from C:\PROGRA~1\NetInst\NiAMH.dll
#6  0x62291143 in ?? () from C:\PROGRA~1\NetInst\NiAMH.dll
#7  0x62292778 in ?? () from C:\PROGRA~1\NetInst\NiAMH.dll
#8  0x62292820 in ?? () from C:\PROGRA~1\NetInst\NiAMH.dll
#9  0x7c90118a in ntdll!LdrSetAppCompatDllRedirectionCallback () from C:\WINDOWS\system32\ntdll.dll
#10 0x62290000 in ?? ()
#11 0x7c91b5d2 in ntdll!LdrHotPatchRoutine () from C:\WINDOWS\system32\ntdll.dll
#12 0x7c9162db in ntdll!RtlValidateUnicodeString () from C:\WINDOWS\system32\ntdll.dll
#13 0x7c91643d in ntdll!LdrShutdownProcess () from C:\WINDOWS\system32\ntdll.dll
#14 0x00000000 in ?? ()
>>>>>>cb_gdb:

oBFusCATed:
What compiler is used to build python? I guess Visual studio?

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