Question

Windows 7 64位，Visual Studio 2010，控制台C ++应用程序，Win32调试配置：

#include "stdafx.h"

int _tmain(int argc, _TCHAR* argv[])
{
    char* p = NULL;
    *p = 1;
    return 0;
}

开始调试。显然，我得到了这个错误消息：

Unhandled exception at 0x77d915de in test.exe: 0xC0000005: Access violation writing location 0x00000000.

我选择Debug并查看以下堆栈：

ntdll.dll!77d915de()    
[Frames below may be incorrect and/or missing, no symbols loaded for ntdll.dll] 
ntdll.dll!77d915de()    
ntdll.dll!77d8014e()    
msvcr100d.dll!_heap_alloc_dbg_impl(unsigned int nSize, int nBlockUse, const char * szFileName, int nLine, int * errno_tmp)  Line 504 + 0xc bytes    C++
>ffffffff()

调试器在dbgheap.c中的__finally行中断。堆栈已损坏，堆栈中缺少行*p = 1。输出窗口：

'test.exe': Loaded 'C:\tmp\test\Debug\test.exe', Symbols loaded.
'test.exe': Loaded 'C:\Windows\SysWOW64\ntdll.dll', Cannot find or open the PDB file
'test.exe': Loaded 'C:\Windows\SysWOW64\kernel32.dll', Cannot find or open the PDB file
'test.exe': Loaded 'C:\Windows\SysWOW64\KernelBase.dll', Cannot find or open the PDB file
'test.exe': Loaded 'C:\Windows\SysWOW64\msvcr100d.dll', Symbols loaded.
First-chance exception at 0x010f13a8 in test.exe: 0xC0000005: Access violation writing location 0x00000000.
Unhandled exception at 0x77d915de in test.exe: 0xC0000005: Access violation writing location 0x00000000.

现在，如果我在x64 Debug配置中运行相同的程序，一切正常 - 调试器在行*p = 1上中断。如何正确调试Win32程序？

Answer 1

Debug-＆gt; Exceptions-＆gt; win32 Exception-＆gt; c0000005勾选“Thrown”列或整个Win32 Exceptions http://msdn.microsoft.com/en-us/library/038tzxdw(v=vs.100).aspx

的“Thrown”列中的框

*p = 1; 
00041375 mov eax,dword ptr [p]
00041378 mov byte ptr [eax],1

test2.exe中0x00041378处的第一次机会异常：0xC0000005：访问冲突写入位置0x00000000

在64位操作系统上调试Win32程序不正确

1 个答案: