异常CLRDBG_NOTIFICATION_EXCEPTION_CODE( 0x04242420)的抛出过程

2024-01-21 15:30:28

新建一个c#控制工程，就用自动生成的代码，不用补任何代码，如下：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
        }
    }
}

工程配置如下

编译，在windbg里加载运行

当调试器中断时，在事件过滤器里添加异常0x04242420方便抛出时跟踪

在命令行输入g命令让程序执行，然后中断

可以看到，抛出了异常0x04242420，调试器中断，输入.exr -1,观察下异常信息

0:000> .exr -1
ExceptionAddress: 762819b2 (KERNELBASE!RaiseException+0x00000062)
   ExceptionCode: 04242420
ExceptionFlags: 00000000
NumberParameters: 3
   Parameter[0]: 31415927
   Parameter[1]: 721a0000
   Parameter[2]: 00b7f3b0

输入kv观察调用栈

0:000> kv
# ChildEBP RetAddr Args to Child
00 00b7f330 72706c26 04242420 00000000 00000003 KERNELBASE!RaiseException+0x62 (FPO: [4,22,0])
01 00b7f3a4 7230aec4 00b7f3b0 00000c38 0000015c clr!Debugger::SendRawEvent+0x5d (FPO: [Non-Fpo])
02 00b7f7e0 72302a5b b1c50dba 00f140a0 723029d0 clr!Debugger::RaiseStartupNotification+0x36 (FPO: [0,268,0])
03 00b7f858 72302b3a b1c50d62 00ed6f38 72307ca0 clr!Debugger::Startup+0x76 (FPO: [Non-Fpo])
04 00b7f880 722f68db b1c50c3a 00000000 00000001 clr!InitializeDebugger+0x80 (FPO: [Non-Fpo])
05 00b7f9d8 722f58ca b1c50fc2 00000000 00000001 clr!EEStartupHelper+0x658 (FPO: [Non-Fpo])
06 00b7fa20 72316b9d b1c50f8a 00000000 00000000 clr!EEStartup+0x1e (FPO: [Non-Fpo])
07 00b7fa68 722c75ac b1c50f4a 00000000 723117c0 clr!EnsureEEStarted+0xd9 (FPO: [Non-Fpo])
08 00b7faa8 723117e5 b1c50f06 00000000 723117c0 clr!_CorExeMainInternal+0x8f (FPO: [Non-Fpo])
09 00b7fae4 7295fa84 5f72de49 729f43f0 7295fa20 clr!_CorExeMain+0x4d (FPO: [Non-Fpo])
0a 00b7fb1c 729ee80e 729f43f0 72950000 00b7fb44 mscoreei!_CorExeMain+0xd6 (FPO: [Non-Fpo])
0b 00b7fb2c 729f43f8 729f43f0 74c00419 0091e000 MSCOREE!ShellShim__CorExeMain+0x9e (FPO: [Non-Fpo])
0c 00b7fb34 74c00419 0091e000 74c00400 00b7fba0 MSCOREE!_CorExeMain_Exported+0x8 (FPO: [0,0,4])
0d 00b7fb44 76f2662d 0091e000 a984cad0 00000000 KERNEL32!BaseThreadInitThunk+0x19 (FPO: [Non-Fpo])
0e 00b7fba0 76f265fd ffffffff 76f451bb 00000000 ntdll!__RtlUserThreadStart+0x2f (FPO: [SEH])
0f 00b7fbb0 00000000 729f43f0 0091e000 00000000 ntdll!_RtlUserThreadStart+0x1b (FPO: [Non-Fpo])
这里就可以看到该异常的抛出过程了，.net执行引擎EE启动，初始化clr调试器（clr!InitializeDebugger），clr调试器启动（clr!Debugger::Startup）,引发启动通知（clr!Debugger::RaiseStartupNotification），发送原始通知clr!Debugger::SendRawEvent，引发异常04242420（KERNELBASE!RaiseException）

输入uf clr!Debugger::SendRawEvent看下异常信息传递过程

0:000> uf clr!Debugger::SendRawEvent
clr!Debugger::SendRawEvent:
7230ae4e 6a40            push    40h
7230ae50 b8d6288672      mov     eax,offset clr! ?? ::FNODOBFM::`string'+0x6f6c9 (728628d6)
7230ae55 e8ef49eaff      call    clr!_EH_prolog3_catch_GS (721af849)
7230ae5a 8b4d08          mov     ecx,dword ptr [ebp+8]//将最后一个附加参数调试器IPC事件指针放入ecx
7230ae5d c785e0ffffff27594131 mov dword ptr [ebp-20h],31415927h//局部变量保存第一个附加参数常量
7230ae67 a13c6e8e72      mov     eax,dword ptr [clr!g_pMSCorEE (728e6e3c)]
7230ae6c 8985e4ffffff    mov     dword ptr [ebp-1Ch],eax
7230ae72 898de8ffffff    mov     dword ptr [ebp-18h],ecx
7230ae78 ff15e0628f72    call    dword ptr [clr!_imp__IsDebuggerPresent (728f62e0)]
7230ae7e 85c0            test    eax,eax
7230ae80 0f855cbd3f00    jne     clr!Debugger::SendRawEvent+0x2b (72706be2) Branch

clr!Debugger::SendRawEvent+0x7c:
7230ae86 e8f748eaff      call    clr!_EH_epilog3_catch_GS (721af782)
7230ae8b c20400          ret     4

clr!Debugger::SendRawEvent+0x2b:
72706be2 e80d80aaff      call    clr!GetThread (721aebf4)
72706be7 50              push    eax
72706be8 8d8dc4ffffff    lea     ecx,[ebp-3Ch]
72706bee e859b0aaff      call    clr!CLRException::HandlerState::HandlerState (721b1c4c)
72706bf3 83a5fcffffff00 and     dword ptr [ebp-4],0
72706bfa c685fcffffff01 mov     byte ptr [ebp-4],1
72706c01 8bc1            mov     eax,ecx
72706c03 8985dcffffff    mov     dword ptr [ebp-24h],eax//最后一个附加参数放到附加参数数组里
72706c09 c685fcffffff02 mov     byte ptr [ebp-4],2
72706c10 8d85e0ffffff    lea     eax,[ebp-20h]//取附件参数首地址放入eax
72706c16 50              push    eax//附件参数首地址入栈
72706c17 6a03            push    3//附件参数个数入栈
72706c19 6a00            push    0//异常标志入栈
72706c1b 6820242404      push    4242420h//异常代码入栈
72706c20 ff15e4628f72    call    dword ptr [clr!_imp__RaiseException (728f62e4)]//抛出异常
72706c26 c685fcffffff01 mov     byte ptr [ebp-4],1
72706c2d 8d8dc4ffffff    lea     ecx,[ebp-3Ch]
72706c33 e8edafaaff      call    clr!CLRException::HandlerState::CleanupTry (721b1c25)
72706c38 83a5fcffffff00 and     dword ptr [ebp-4],0
72706c3f 838dfcffffffff or      dword ptr [ebp-4],0FFFFFFFFh
72706c46 f685c4ffffff02 test    byte ptr [ebp-3Ch],2
72706c4d 0f843342c0ff    je      clr!Debugger::SendRawEvent+0x7c (7230ae86) Branch

码农公寓

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