我正在尝试使用 Konica Minolta PCL 驱动程序从内存转储中查找访问冲突的原因。我会尽量提供所需的信息。也许其他处于类似情况的人会从中受益。
我正在研究的软件是用 Delphi 2007 编写的非托管窗口的组合，它通过 COM 托管 .net 组件。其他故障转储表明在设置浮点异常http://connect.microsoft.com/VisualStudio/feedback/details/535285/using-events-on-interop-assemblies-causes-system-stackoverflowexception#details时可能存在错误连接，以及我正在尝试确定是否有任何相似之处。
转储是由第二次机会异常引起的：尝试从内存中读取时，C:\Windows\System32\spool\drivers\w32x86\3\KOAZ8J_O.DLL 中的 KOAZ8J_O!OAPIGetPrinterEncryptionSettingForDriver+36778 已导致访问冲突异常 (0xC0000005)线程 16 上的位置0x1906ef0c。
加载 Windbg 我发现这个调用堆栈：0:016> kL ChildEBP RetAddr
警告：堆栈展开信息不可用。以下框架可能是错误的。253efdcc 22958881 KOAZ8J_O！OAPIGetPrinterEncryptionSettingForDriver + 0x36778 253efe1c 2294eff5 KOAZ8J_O！OAPIGetPrinterEncryptionSettingForDriver + 0x36819 253efe28 22976dde KOAZ8J_O！OAPIGetPrinterEncryptionSettingForDriver + 0x2cf8d 253efe68 22976e85 KOAZ8J_O！OAPIGetPrinterEncryptionSettingForDriver + 0x54d76 253efe90 7795f731 KOAZ8J_O！OAPIGetPrinterEncryptionSettingForDriver + 0x54e1d 253eff34 7795f632 NTDLL！LdrShutdownThread + 0xe6 253eff44 75c576f5 NTDLL！RtlExitUserThread + 0x2a 253eff58 774c03c0 KERNELBASE!FreeLibraryAndExitThread+0x5f 253eff68 5e59367e kernel32!FreeLibraryAndExitThreadStub+0x10 253eff88 774ced6c +0x23367e 253eff94 7799377b kernel32!BaseThreadInitThunk+0xe 253effntd47e
我没有打印机驱动程序的符号，并且通过最后一个已知函数名称的偏移量，我怀疑有问题的函数是一个完全不同的函数。
0:016> r
eax=22920000 ebx=00000001 ecx=1906ef00 edx=22a01000 esi=24e42ff0 edi=229e6598
eip=229587e0 esp=253efdbc ebp=253efdcc iopl=0 nv up ei pl nz na pe nc
cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00010206
KOAZ8J_O!OAPIGetPrinterEncryptionSettingForDriver+0x36778:
229587e0 3944d904 cmp dword ptr [ecx+ebx*8+4],eax ds:0023:1906ef0c=????????
0:016> db ecx+ebx*8+4
1906ef0c ?? ?? ?? ?? ?? ?? ?? ??-?? ?? ?? ?? ?? ?? ?? ?? ????????????????
1906ef1c ?? ?? ?? ?? ?? ?? ?? ??-?? ?? ?? ?? ?? ?? ?? ?? ????????????????
1906ef2c ?? ?? ?? ?? ?? ?? ?? ??-?? ?? ?? ?? ?? ?? ?? ?? ????????????????
1906ef3c ?? ?? ?? ?? ?? ?? ?? ??-?? ?? ?? ?? ?? ?? ?? ?? ????????????????
1906ef4c ?? ?? ?? ?? ?? ?? ?? ??-?? ?? ?? ?? ?? ?? ?? ?? ????????????????
1906ef5c ?? ?? ?? ?? ?? ?? ?? ??-?? ?? ?? ?? ?? ?? ?? ?? ????????????????
1906ef6c ?? ?? ?? ?? ?? ?? ?? ??-?? ?? ?? ?? ?? ?? ?? ?? ????????????????
1906ef7c ?? ?? ?? ?? ?? ?? ?? ??-?? ?? ?? ?? ?? ?? ?? ?? ????????????????
0:016> uf 229587e0
KOAZ8J_O!OAPIGetPrinterEncryptionSettingForDriver+0x3676e:
229587d6 8b450c mov eax,dword ptr [ebp+0Ch]
229587d9 85c0 test eax,eax
229587db 7418 je KOAZ8J_O!OAPIGetPrinterEncryptionSettingForDriver+0x3678d (229587f5)
KOAZ8J_O!OAPIGetPrinterEncryptionSettingForDriver+0x36775:
229587dd 8b4f10 mov ecx,dword ptr [edi+10h]
KOAZ8J_O!OAPIGetPrinterEncryptionSettingForDriver+0x36778:
229587e0 3944d904 cmp dword ptr [ecx+ebx*8+4],eax
229587e4 740f je KOAZ8J_O!OAPIGetPrinterEncryptionSettingForDriver+0x3678d (229587f5)
KOAZ8J_O!OAPIGetPrinterEncryptionSettingForDriver+0x3677e:
229587e6 8b460c mov eax,dword ptr [esi+0Ch]
229587e9 833c9800 cmp dword ptr [eax+ebx*4],0
229587ed 741d je KOAZ8J_O!OAPIGetPrinterEncryptionSettingForDriver+0x367a4 (2295880c)
KOAZ8J_O!OAPIGetPrinterEncryptionSettingForDriver+0x36787:
229587ef 8365fc00 and dword ptr [ebp-4],0
229587f3 eb17 jmp KOAZ8J_O!OAPIGetPrinterEncryptionSettingForDriver+0x367a4 (2295880c)
KOAZ8J_O!OAPIGetPrinterEncryptionSettingForDriver+0x3678d:
229587f5 8b460c mov eax,dword ptr [esi+0Ch]
229587f8 8b0c98 mov ecx,dword ptr [eax+ebx*4]
229587fb 85c9 test ecx,ecx
229587fd 7406 je KOAZ8J_O!OAPIGetPrinterEncryptionSettingForDriver+0x3679d (22958805)
KOAZ8J_O!OAPIGetPrinterEncryptionSettingForDriver+0x36797:
229587ff 8b01 mov eax,dword ptr [ecx]
22958801 6a01 push 1
22958803 ff10 call dword ptr [eax]
KOAZ8J_O!OAPIGetPrinterEncryptionSettingForDriver+0x3679d:
22958805 8b460c mov eax,dword ptr [esi+0Ch]
22958808 83249800 and dword ptr [eax+ebx*4],0
KOAZ8J_O!OAPIGetPrinterEncryptionSettingForDriver+0x367a4:
2295880c 43 inc ebx
2295880d 3b5e08 cmp ebx,dword ptr [esi+8]
22958810 7cc4 jl KOAZ8J_O!OAPIGetPrinterEncryptionSettingForDriver+0x3676e (229587d6)
KOAZ8J_O!OAPIGetPrinterEncryptionSettingForDriver+0x367aa:
22958812 837dfc00 cmp dword ptr [ebp-4],0
22958816 7435 je KOAZ8J_O!OAPIGetPrinterEncryptionSettingForDriver+0x367e5 (2295884d)
KOAZ8J_O!OAPIGetPrinterEncryptionSettingForDriver+0x367b0:
22958818 8d5f1c lea ebx,[edi+1Ch]
2295881b 53 push ebx
2295881c ff1544c19e22 call dword ptr [KOAZ8J_O!OAPIGetPrinterEncryptionSettingForDriver+0xca0dc (229ec144)]
22958822 56 push esi
22958823 8d4f14 lea ecx,[edi+14h]
22958826 e80bfcffff call KOAZ8J_O!OAPIGetPrinterEncryptionSettingForDriver+0x363ce (22958436)
2295882b 53 push ebx
2295882c ff1548c19e22 call dword ptr [KOAZ8J_O!OAPIGetPrinterEncryptionSettingForDriver+0xca0e0 (229ec148)]
22958832 ff760c push dword ptr [esi+0Ch]
22958835 ff1530c19e22 call dword ptr [KOAZ8J_O!OAPIGetPrinterEncryptionSettingForDriver+0xca0c8 (229ec130)]
2295883b 8b06 mov eax,dword ptr [esi]
2295883d 6a01 push 1
2295883f 8bce mov ecx,esi
22958841 ff10 call dword ptr [eax]
22958843 6a00 push 0
22958845 ff37 push dword ptr [edi]
22958847 ff15c8bf9e22 call dword ptr [KOAZ8J_O!OAPIGetPrinterEncryptionSettingForDriver+0xc9f60 (229ebfc8)]
KOAZ8J_O!OAPIGetPrinterEncryptionSettingForDriver+0x367e5:
2295884d 5f pop edi
2295884e 5e pop esi
2295884f 5b pop ebx
22958850 c9 leave
22958851 c20800 ret 8
有人能在这个汇编代码中发现任何明显的错误吗？为什么它会解决这个无效的内存位置。我也在寻找有关如何进一步查明错误的指导。我的目标是寻找一种解决方法（所以这个代码块不会运行）并为驱动程序的作者提供尽可能多的信息。