DLL調用異常

 寫了一個接口DLL，供華為IVR平台調用實作某功能。

奇怪的事情發生了，我用自己的demo調用一切OK，用IVR平台調用出現位址錯誤。

這個問題困惑了多天，最後經人指點，改成間接調用：IVR調用DLL時，DLL調用demo，demo再調用該DLL……。

想是隻換了一個調用具體功能的父程序而已。

不知道問題出在哪，留此帖做記号。

代碼如下：

1. // faxdll.cpp : 定義 DLL 應用程式的入口點。
2. #include "stdafx.h"
3. #ifdef _MANAGED
4. #pragma managed(push, off)
5. #endif
6. int g_c_debug;
7. CString csIniFile = "C://CSoft//ConfigFax.ini";
8. TCHAR g_szFaxPath[MAX_PATH];
9. string strOther;
10. CRITICAL_SECTION g_cs;
11. BOOL APIENTRY DllMain( HMODULE hModule,
12.                        DWORD  ul_reason_for_call,
13.                        LPVOID lpReserved
14.                      )
15. {
16.     switch (ul_reason_for_call)
17.     {
18.     case DLL_PROCESS_ATTACH:
19.         g_c_debug = GetPrivateProfileInt("fax","DEBUG",1,csIniFile);
20.         GetPrivateProfileString("fax","faxdir","C://CSoft//",g_szFaxPath,MAX_PATH,csIniFile);
21.         //disDebug("PROCESS_ATTACH");
22.         break;
23.     case DLL_THREAD_ATTACH:
24.         //disDebug("THREAD_ATTACH");
25.         break;
26.     case DLL_THREAD_DETACH:
27.         //disDebug("THREAD_DETACH");
28.         break;
29.     case DLL_PROCESS_DETACH:
30.         //DeleteCriticalSection(&g_cs);
31.         //disDebug("PROCESS_DETACH");
32.         break;
33.     default:
34.         //disDebug("default:%d!",ul_reason_for_call);
35.         break;
36.     }
37.     return TRUE;
38. }
39. void _stdcall disDebug(const TCHAR *szFormat, ...)
40. {
41.     if (g_c_debug)
42.     {
43.         CString  csBuffer;
44.         TCHAR   szBuffer [4096];
45.         SYSTEMTIME  st;   
46.         ::GetSystemTime(&st);
47.         va_list pArgList ;
48.         va_start (pArgList, szFormat) ;
49.         _vsntprintf_s (szBuffer, sizeof (szBuffer) / sizeof (TCHAR), szFormat, pArgList) ;
50.         csBuffer.Format("%02d:%02d:%02d/t%d/t%s/r/n",st.wHour + 8,st.wMinute,st.wSecond,::GetCurrentThreadId(),szBuffer);
51.         va_end (pArgList) ;
52.         CString m_logErrName;
53.         m_logErrName.Format("%s%d.log","c://Csoft//",GetCurrentThreadId());
54.         HANDLE fh = CreateFile(m_logErrName, GENERIC_WRITE, FILE_SHARE_WRITE, NULL, OPEN_ALWAYS, 
55.             FILE_ATTRIBUTE_NORMAL, NULL);
56.         if(fh == INVALID_HANDLE_VALUE) 
57.         {
58.             return;
59.         }
60.         SetFilePointer(fh, 0, NULL, FILE_END);
61.         DWORD length;
62.         WriteFile(fh, csBuffer.GetBuffer(csBuffer.GetLength()), csBuffer.GetLength(), &length, NULL);
63.         CloseHandle(fh);
64.     }
65.     return;
66. }
67. extern "C"
68. {
69.     int __stdcall CreateFaxFile(    
70.         const char* pPhone,
71.         const char* pCompanyName,
72.         const char* pPhone2,
73.         const char* pCompanyAddr,
74.         const char* pCompanyPhone,
75.         const char* pCompanyInfo,
76.         char* filepath
77.         )
78.     {
79.              char tiffpath[MAX_PATH];
80.         TFAXBITMAPS faxtiff;
81.         string sPhone = pPhone;
82.         string sPhone2 = pPhone2;
83.         string sCompanyName = pCompanyName;
84.         string sCompanyAddr = pCompanyAddr;
85.         string sCompanyPhone = pCompanyPhone;
86.         string sCompanyInfo = pCompanyInfo;
87.         sprintf_s(tiffpath,MAX_PATH,"%s%s.tiff",g_szFaxPath,pPhone);
88.         //disDebug("before Createfaxfile/n");
89.         faxtiff.CFax_BillFile(tiffpath,sPhone,sPhone2,sCompanyName,sCompanyAddr,sCompanyPhone,sCompanyInfo);
90.         memset(filepath,0,sizeof(filepath));
91.         strncpy(filepath,tiffpath,sizeof(tiffpath));
92.         //disDebug("RET %s",filepath);
93.         return 0;
94.     }
95.     int __stdcall DeleteFaxFile(char* pFilePath)
96.     {
97.         //disDebug("delete files:%s/n",pFilePath);
98.         DWORD dwAttri = GetFileAttributes(pFilePath);
99.         //disDebug("attribute:%x/n",dwAttri);
100.         if (dwAttri == FILE_ATTRIBUTE_ARCHIVE)
101.         {
102.             //disDebug("before delete/n");
103.             bool bdelete = DeleteFile(pFilePath);
104.             //disDebug("after delete:%d/n",bdelete);
105.             if(bdelete)
106.             {
107.                 return 0;
108.             }
109.         }
110.         return 1;
111.     }
112. }
113. #ifdef _MANAGED
114. #pragma managed(pop)
115. #endif

DEMO代碼如下：

1. // demo.cpp : 定義控制台應用程式的入口點。
2. //
3. #include "stdafx.h"
4. #include <stdlib.h>
5. #include <windows.h>
6. #include <string>
7. #include <iostream>
8. using namespace std;
9. typedef int (__stdcall* LPFNDLLFUNC1)(char*);
10. typedef int (__stdcall* LPFNDLLFUNC2)(const char*,const char*,const char*,const char*,const char*,const char*,char*);
11. typedef int (__stdcall* LPFNDLLFUNC3)();
12. HINSTANCE hDLL;  
13. LPFNDLLFUNC1 lpfnDllFunc1;    // Function pointer
14. LPFNDLLFUNC2 lpfnFaxFile;
15. LPFNDLLFUNC3 lpfnTest;
16. DWORD WINAPI ThreadFun(LPVOID n)
17. {
18.     TCHAR buffer[MAX_PATH];
19.     // Handle to DLL
20.     //lpfnTest = (LPFNDLLFUNC3)GetProcAddress(hDLL,"MyTest");
21.     int  nReturnVal = -1;
22.     string strPhone,strPhone2,strCompanyInfo,strCompanyName,strCompanyAddr,strCompanyPhone;
23.     memset(buffer,0,sizeof(buffer));
24.     itoa(GetCurrentThreadId(),buffer,10);
25. //  nReturnVal = lpfnDllFunc1("C://CSoft//20080920_DEBUG.log");
26. //  while(1)
27.     {
28. //      nReturnVal = lpfnTest();
29. //      printf("ID:%d,nret:%d/n",GetCurrentThreadId(),nReturnVal);
30. //      return 0;
31.     }
32.     //cout<<"dll檔案目前目錄"<<"/t"<<buffer<<endl;
33.     //cout << "來電号碼，查詢号碼，公司名稱，公司位址，公司電話，,公司簡介"<<endl;
34.     printf("ID:%d,nret:%s/n",GetCurrentThreadId(),"before");
35.     strPhone = itoa(GetCurrentThreadId(),buffer,10);
36.     nReturnVal = lpfnFaxFile(strPhone.c_str(),strCompanyName.c_str(),strPhone2.c_str(),strCompanyAddr.c_str(),strCompanyPhone.c_str(),strCompanyInfo.c_str(),buffer);
37.     printf("ID:%d,nret:%d/n",GetCurrentThreadId(),nReturnVal);
38.     //cout << "傳回值 "<<nReturnVal <<"thread:"<< GetCurrentThreadId() << endl;
39.     //cout <<buffer<<endl;
40.     return 0;
41. }
42. int _tmain(int argc, _TCHAR* argv[])
43. {
44.     const int nTheadNum = 2;
45.     HANDLE harg[nTheadNum];
46.     hDLL = ::LoadLibrary("faxdll.dll");
47.     if (hDLL != NULL)
48.     {
49.         lpfnDllFunc1 = (LPFNDLLFUNC1)GetProcAddress(hDLL,"DeleteFaxFile");
50.         lpfnFaxFile = (LPFNDLLFUNC2)GetProcAddress(hDLL,"CreateFaxFile");
51.         lpfnTest = (LPFNDLLFUNC3)GetProcAddress(hDLL,"MyTest");
52.         if (!lpfnDllFunc1)
53.         {
54.             // handle the error
55.             printf("入口裝載失敗/n");
56.             FreeLibrary(hDLL);       
57.             return 1;
58.         }
59.         else
60.         {
61.             // call the function
62.             for (int i=0; i< nTheadNum; ++i)
63.             {
64.                 //ThreadFun(0);
65.                 //Sleep(50);
66.                 if((harg[i] = CreateThread(NULL,0,(LPTHREAD_START_ROUTINE)ThreadFun,0,0,NULL)) == NULL)
67.                     cout << "線程建立失敗" << endl;
68.             }
69.         }
70.     }
71.     else
72.     {
73.         printf("裝載失敗!/n");
74.         DWORD derr = GetLastError();
75.         printf("%x/n",derr);
76.     }
77.     DWORD dw = WaitForMultipleObjects(nTheadNum,harg,true,4000);
78.     Sleep(100);
79.     if(dw == WAIT_TIMEOUT)//INFINITE
80.     {
81.         for (int i = 0; i < nTheadNum; ++i)
82.         {
83.             TerminateThread(harg[i],1);
84.         }
85.         cout <<"/n/n逾時退出/n/n"<<endl;
86.     }
87.     cout <<"/n/n/n退出碼:"<<dw<<endl;
88.     FreeLibrary(hDLL);
89.     system("pause");
90.     return 0;
91. }