mdump.cpp

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// #include <stdafx.h>
#include "mdump.h"


#include <assert.h>
#include <string.h>
#include <stdio.h>
#include <mbstring.h>
#include <wchar.h>
#include <TCHAR.H>

#include "../../ascstring.h"
#include "../../strtmesg.h"


// because the windows header are polluting the global namespace we can't include basestrm.h :-(
extern int getSearchPathNum();
extern ASCString getSearchPath ( int i );

LPCSTR MiniDumper::m_szAppName;

MiniDumper::MiniDumper( LPCSTR szAppName )
{
   // if this assert fires then you have two instances of MiniDumper
   // which is not allowed
   assert( m_szAppName==NULL );

   m_szAppName = szAppName ? strdup(szAppName) : "Application";

   ::SetUnhandledExceptionFilter( TopLevelFilter );
}

LONG MiniDumper::TopLevelFilter( struct _EXCEPTION_POINTERS *pExceptionInfo )
{
   LONG retval = EXCEPTION_CONTINUE_SEARCH;
   HWND hParent = NULL;                // find a better value for your app

   // firstly see if dbghelp.dll is around and has the function we need
   // look next to the EXE first, as the one in System32 might be old
   // (e.g. Windows 2000)
   HMODULE hDll = NULL;
   char szDbgHelpPath[_MAX_PATH];

   if (GetModuleFileName( NULL, szDbgHelpPath, _MAX_PATH )) {
      char *pSlash = _tcsrchr( szDbgHelpPath, '\\' );
      if (pSlash) {
         _tcscpy( pSlash+1, "DBGHELP.DLL" );
         hDll = ::LoadLibrary( szDbgHelpPath );
      }
   }

   if (hDll==NULL) {
      // load any version we can
      hDll = ::LoadLibrary( "DBGHELP.DLL" );
   }

   LPCTSTR szResult = NULL;

   if (hDll) {
      MINIDUMPWRITEDUMP pDump = (MINIDUMPWRITEDUMP)::GetProcAddress( hDll, "MiniDumpWriteDump" );
      if (pDump) {
         char szDumpPath[_MAX_PATH];
         char szScratch [_MAX_PATH];

         if ( getSearchPathNum() ) {
            _tcscpy( szDumpPath, getSearchPath(0).c_str() );
         } else {
            // work out a good place for the dump file
            if (!GetTempPath( _MAX_PATH, szDumpPath ))
               _tcscpy( szDumpPath, "c:\\temp\\" );
         }

         _tcscat( szDumpPath, getFullVersionString() );
         _tcscat( szDumpPath, m_szAppName );
         _tcscat( szDumpPath, ".dmp" );

         // ask the user if they want to save a dump file
         // if (::MessageBox( NULL, "ASC has crashed. would you like to save a diagnostic file?", m_szAppName, MB_YESNO )==IDYES)
         if ( true ) {
            // create the file
            HANDLE hFile = ::CreateFile( szDumpPath, GENERIC_WRITE, FILE_SHARE_WRITE, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL );

            if (hFile!=INVALID_HANDLE_VALUE) {
               _MINIDUMP_EXCEPTION_INFORMATION ExInfo;

               ExInfo.ThreadId = ::GetCurrentThreadId();
               ExInfo.ExceptionPointers = pExceptionInfo;
               ExInfo.ClientPointers = NULL;

               // write the dump
               BOOL bOK = pDump( GetCurrentProcess(), GetCurrentProcessId(), hFile, MiniDumpNormal, &ExInfo, NULL, NULL );
               if (bOK) {
                  sprintf( szScratch, "ASC has crashed :-(\nSaved dump file to '%s'\nPlease send it to bugs@asc-hq.org", szDumpPath );
                  szResult = szScratch;
                  retval = EXCEPTION_EXECUTE_HANDLER;
               } else {
                  sprintf( szScratch, "Failed to save dump file to '%s' (error %d)", szDumpPath, GetLastError() );
                  szResult = szScratch;
               }
               ::CloseHandle(hFile);
               ::MessageBox( NULL, szResult, m_szAppName, MB_OK | MB_ICONERROR );
               return retval;
            } else {
               sprintf( szScratch, "Failed to create dump file '%s' (error %d)", szDumpPath, GetLastError() );
               szResult = szScratch;
            }
         }
      } else {
         szResult = "DBGHELP.DLL too old";
         ::MessageBox( NULL, szDbgHelpPath, m_szAppName, MB_OK | MB_ICONERROR);
         return retval;
      }
   } else {
      szResult = "DBGHELP.DLL not found";
   }

   if (szResult)
      ::MessageBox( NULL, szResult, m_szAppName, MB_OK | MB_ICONERROR );

   return retval;
}

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