c# - WinDbg sosex无法调试

Question

我正在尝试调试托管代码。 .exe 文件是为 x64

构建的

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

namespace DebugTutorial
{
    class Program
    {
        public static void Foo2()
        {
            Console.WriteLine("Foo2");
        }

        public static void Foo1()
        {
            Console.WriteLine("Foo1");
        }

        public static void Parent()
        {
            Foo1();
            Console.WriteLine("Parent");
        }

        static void Main(string[] args)
        {
            Foo1();
            Foo2();
            Parent();
        }
    }
}

我正在执行下一个命令:

0:000> .load C:\Windows\Microsoft.NET\Framework64\v4.0.30319\clr.dll
0:000> .load C:\Users\Anton\Downloads\sosex_64\sosex.dll
0:000> .symfix
0:000> .reload /f
Reloading current modules
.*** WARNING: Unable to verify checksum for DebugTutorial.exe
....
0:000> lm
start             end                 module name
00000252`916b0000 00000252`916b6000   DebugTutorial C (pdb symbols)          C:\ProgramData\dbg\sym\DebugTutorial.pdb\B430DC1915A0462AB2D21E18458D70E71\DebugTutorial.pdb
00007ffb`233a0000 00007ffb`23404000   MSCOREE    (pdb symbols)          C:\ProgramData\dbg\sym\mscoree.pdb\02E66277C518120A967A3BFBC1850C941\mscoree.pdb
00007ffb`30280000 00007ffb`304f3000   KERNELBASE   (pdb symbols)          C:\ProgramData\dbg\sym\kernelbase.pdb\CD6C76E6120253287103CD7E22CC0A5D1\kernelbase.pdb
00007ffb`32900000 00007ffb`329b1000   KERNEL32   (pdb symbols)          C:\ProgramData\dbg\sym\kernel32.pdb\CA130BEBF44E36EAC20C5E95752843F61\kernel32.pdb
00007ffb`33ca0000 00007ffb`33e81000   ntdll      (pdb symbols)          C:\ProgramData\dbg\sym\ntdll.pdb\95927C40B68E505CD22742795247114C1\ntdll.pdb
0:000> !mbp DebugTutorial Foo1
The CLR has not yet been initialized in the process.
Breakpoint resolution will be attempted when the CLR is initialized.
0:000> .load C:\Windows\Microsoft.NET\Framework64\v4.0.30319\clr.dll
0:000> .reload /f
Reloading current modules
.*** WARNING: Unable to verify checksum for DebugTutorial.exe
....
0:000> !mbp DebugTutorial Foo1
The breakpoint could not be set because a breakpoint has already been specified for this source location.

如果我使用 F9 热键放置断点，我会看到下一个

0:000> g
Unable to insert breakpoint 0 at 00000252`916b002e, Win32 error 0n998
    "Invalid access to memory location."
bp0 at 00000252`916b002e failed
WaitForEvent failed
ntdll!LdrpDoDebuggerBreak+0x31:
00007ffb`33d6c93d eb00            jmp     ntdll!LdrpDoDebuggerBreak+0x33 (00007ffb`33d6c93f)

Win32 error 0n998

为什么？怎么了？如何使用windbg调试.net？

Answer 1

.load ...\clr.dll 正在尝试将 .NET 框架作为 WinDbg 的插件加载。那是行不通的。 WinDbg 的 .NET 插件称为 SOS，您通常执行 .loadby sos clr。不过，这对于本次 session 的其余部分应该没有多大影响。

首先，您使用 !mbp，它与源文件和行号一起使用。但是，您可以将它与模块和方法一起使用。

其次，即使对于 !mbm，参数 DebugTutorial Foo1 也不正确。格式为module!namespace.class.method。幸运的是，您可以使用通配符。尝试!mbm *!*方法

第三，恕我直言，如果 .NET 框架已经加载并且有关抖动，您可以更好地了解您的命令是否有效。使用 sxe ld clrjit 来实现这一点。

所以我们开始:

ntdll!LdrpDoDebuggerBreak+0x30:
00007ffd`fe112cfc cc              int     3
0:000> sxe ld clrjit
0:000> *** Wait until .NET is loaded
0:000> g

(3bc4.33bc): Unknown exception - code 04242420 (first chance)
ModLoad: 00007ffd`d2530000 00007ffd`d265b000   C:\Windows\Microsoft.NET\Framework64\v4.0.30319\clrjit.dll
ntdll!NtMapViewOfSection+0x14:
00007ffd`fe0dfb94 c3              ret
0:000> .load E:\...\sosex.dll
0:000> !mbm *!*Foo1
0:000> !mbl
0 e : disable *!*FOO1 ILOffset=0: pass=1 oneshot=false thread=ANY
    SODebugMBP!DebugTutorial.Program.Foo1() (PENDING JIT)

0:000> g

Breakpoint: JIT notification received for method DebugTutorial.Program.Foo1() in AppDomain 0000028c1a58ea00.
Breakpoint set at DebugTutorial.Program.Foo1() in AppDomain 0000028c1a58ea00.
Breakpoint 2 hit
00007ffd`730804e8 90              nop
0:000> !clrstack
OS Thread Id: 0x13d4 (0)
        Child SP               IP Call Site
000000d4d8afeaa0 00007ffd730804e8 DebugTutorial.Program.Foo1() [C:\...\Program.cs @ 14]
000000d4d8afead0 00007ffd730804a2 DebugTutorial.Program.Main(System.String[]) [C:\...\Program.cs @ 26]
000000d4d8afed30 00007ffdd2666da3 [GCFrame: 000000d4d8afed30]