dbgrpt.c

C标准库源代码

        nCode = __crtMessageBoxA(szOutMessage,
                             "Microsoft Visual C++ Debug Library",
                             MB_TASKMODAL|MB_ICONHAND|MB_ABORTRETRYIGNORE|MB_SETFOREGROUND);

        /* Abort: abort the program */
        if (IDABORT == nCode)
        {
            /* raise abort signal */
            raise(SIGABRT);

            /* We usually won't get here, but it's possible that
               SIGABRT was ignored.  So exit the program anyway. */

            _exit(3);
        }

        /* Retry: return 1 to call the debugger */
        if (IDRETRY == nCode)
            return 1;

        /* Ignore: continue execution */
        return 0;
}

#elif defined (_M_MPPC)

/* Definitions */
#define  NIL       0

/* Portable Types */
typedef unsigned char     Char;
typedef unsigned long     Word;

QDGlobals qd;

static void BlinkButton(int count,Rect *r)
{
        long n;

        while (count--) {
            InvertRoundRect(r,10,10);
            Delay(4,&n);
        }
}

static int ButtonClicked(Rect *r)
{
        int state = 0;
        Point pt;

        do {
            GetMouse(&pt);
            if (PtInRect(pt,r)) {
                if (0 == state) {
                    state = 1;
                    BlinkButton(1,r);
                }
            }
            else if (1 == state) {
                state = 0;
                BlinkButton(1,r);
            }
        } while (Button());
        if (state)
            BlinkButton(3,r);
        return state;
}

static int CrtMessageWindow(
        int nRptType,
        const char * szFile,
        const char * szLine,
        const char * szModule,
        const char * szUserMessage
        )
{
        #define LEFTMARGIN  15
        #define ALINE       14

        char szOutMessage[MAX_MSG];
        Rect abort,retry,ignore,r;
        GrafPtr oldPort;
        WindowPtr window;
        EventRecord event;
        long total, contig;
        short currHeight = 20;
        int numLines = 13 +
            4 * (_CRT_ASSERT == nRptType) +
            2 * (szUserMessage[0] != '\0') +
            (szModule != NULL) +
            2 * (szFile != NULL);

        /* center a rectangle on the screen, near the top of the screen */
        r.top = 50;
        r.bottom = r.top + numLines * ALINE;
        r.left = qd.screenBits.bounds.right/2 - 170;
        r.right = qd.screenBits.bounds.right/2 + 170;

        /*
         * NewWindow will hang in insufficient memory conditions. Must
         * confirm available memory before use.
         */

        contig = 0;
        PurgeSpace(&total, &contig);
        if (contig < 1024)
            return -1;

        /* create the window and setup the port */
        if ((window = NewWindow(NIL,&r,"\p",TRUE,dBoxProc,(WindowPtr)-1,TRUE,0))
            == NULL)
            return -1;

        GetPort(&oldPort);
        SetPort(window);
        InitCursor();

        TextFont(systemFont);

        MoveTo(LEFTMARGIN,currHeight);
        TextFace(underline);
        DrawString("\pMicrosoft Visual C++ Debug Library");
        TextFace(0);
        currHeight += 2 * ALINE;

        _snprintf(szOutMessage, MAX_MSG, "Debug %s!", _CrtDbgModeMsg[nRptType]);
        _c2pstr(szOutMessage);
        MoveTo(LEFTMARGIN,currHeight);
        TextFace(bold);
        DrawString(szOutMessage);
        TextFace(0);
        currHeight += 2 * ALINE;

        MoveTo(LEFTMARGIN,currHeight);
        DrawString("\pProgram: ");
        DrawString(LMGetCurApName());
        currHeight += ALINE;

        if (szModule) {
            _snprintf(szOutMessage, MAX_MSG, "Module: %s", szModule);
            _c2pstr(szOutMessage);
            MoveTo(LEFTMARGIN,currHeight);
            DrawString(szOutMessage);
            currHeight += ALINE;
        }

        if (szFile) {
            _snprintf(szOutMessage, MAX_MSG, "File: %s", szFile);
            _c2pstr(szOutMessage);
            MoveTo(LEFTMARGIN,currHeight);
            DrawString(szOutMessage);
            currHeight += ALINE;
        }

        if (szLine) {
            _snprintf(szOutMessage, MAX_MSG, "Line: %s", szLine);
            _c2pstr(szOutMessage);
            MoveTo(LEFTMARGIN,currHeight);
            DrawString(szOutMessage);
            currHeight += ALINE;
        }
        currHeight += ALINE;

        if (szUserMessage[0])
        {
            _snprintf(szOutMessage, MAX_MSG, "%s%s",
                (_CRT_ASSERT == nRptType) ? "Expression: " : "",
                szUserMessage);

            r.top = currHeight-10;
            r.bottom = currHeight - 5;
            r.left = LEFTMARGIN - 2;
            r.right = window->portRect.right - LEFTMARGIN - 2;
            TextFace(condense);
            TextBox(szOutMessage, strlen(szOutMessage), &r, teJustLeft);
            TextFace(0);
            currHeight += 2*ALINE;
        }

        currHeight += ALINE;

        if (_CRT_ASSERT == nRptType)
        {
            MoveTo(LEFTMARGIN,currHeight);
            DrawString("\pFor more information on how your program");
            currHeight += ALINE;

            MoveTo(LEFTMARGIN,currHeight);
            DrawString("\pcan cause an assertion failure, see the");
            currHeight += ALINE;

            MoveTo(LEFTMARGIN,currHeight);
            DrawString("\pVisual C++ documentation on asserts.");
            currHeight += 2*ALINE;

            MoveTo(LEFTMARGIN,currHeight);
            DrawString("\p(Press Retry to debug the application)");
            currHeight += 2*ALINE;
        }
        else {
            MoveTo(LEFTMARGIN,currHeight);
            DrawString("\p(Press Retry to debug the application)");
            currHeight += 2*ALINE;
        }

        /* draw abort button */
        abort.top = currHeight;
        abort.bottom = abort.top + 20;
        abort.left = LEFTMARGIN;
        abort.right = abort.left + 75;
        FrameRoundRect(&abort,10,10);
        MoveTo((short)(abort.left+20),(short)(abort.bottom-6));
        DrawString("\pAbort");

        /* draw retry button */
        retry.top = currHeight;
        retry.bottom = retry.top + 20;
        retry.left = LEFTMARGIN + 110;
        retry.right = retry.left + 75;
        FrameRoundRect(&retry,10,10);
        MoveTo((short)(retry.left+20),(short)(retry.bottom-6));
        DrawString("\pRetry");

        /* draw ignore button */
        ignore.top = currHeight;
        ignore.bottom = ignore.top + 20;
        ignore.left = LEFTMARGIN + 110 * 2;
        ignore.right = ignore.left + 75;
        FrameRoundRect(&ignore,10,10);
        MoveTo((short)(ignore.left+17),(short)(ignore.bottom-6));
        DrawString("\pIgnore");

        /* event loop */
        while (TRUE) {
            if (GetNextEvent(mDownMask+keyDownMask,&event)) {
                if (event.what == keyDown) { /* keyboard shortcuts */
                    char c = (char)event.message;

                    /* abort */
                    if (c == 'a') {
                        BlinkButton(3,&abort);
                        ExitToShell();
                    }

                    /* retry */
                    else if (c == 'r') {
                        BlinkButton(3,&retry);
                        Debugger();
                        break;
                    }

                    /* ignore */
                    else if (c == 'i') {
                        BlinkButton(3,&ignore);
                        break;
                    }
                }
                if (event.what == mouseDown) {
                    GlobalToLocal(&event.where);
                    if (PtInRect(event.where,&abort) && ButtonClicked(&abort))
                        ExitToShell();
                    else if (PtInRect(event.where,&retry) && ButtonClicked(&retry)) {
                        Debugger();
                        break;
                    }
                    else if (PtInRect(event.where,&ignore) && ButtonClicked(&ignore))
                        break;
                }
            }
        }
        DisposeWindow(window);
        SetPort(oldPort);

        /* ignore */
        return 0;
}

#define WLMD_STR        1
#define LMGetMacJmp()   (*(ProcPtr*) 0x120)

enum
{
        uppGestaltDebugProcInfo =   kCStackBased
            | STACK_ROUTINE_PARAMETER (1, SIZE_CODE (sizeof (int)))
            | STACK_ROUTINE_PARAMETER (2, SIZE_CODE (sizeof (StringPtr)))
            | STACK_ROUTINE_PARAMETER (3, SIZE_CODE (sizeof (char*)))
            | STACK_ROUTINE_PARAMETER (4, SIZE_CODE (sizeof (char*)))
};


static UniversalProcPtr pfnGestaltDebugger;


/***
*void _CleanStr - clean string
*
*Purpose:
*       Cleans a string of characters that aren't useful. Always removes '\r'. If
*       the string is going to MacsBug, replaces semicolons with periods, and
*       removes trailing newlines, since MacsBug always advances to the next line
*       after a _DebugStr.
*
*Entry:
*       StringPtr   st          - the string to clean
*       int         fMacsBug    - whether the string is going to MacsBug
*
*Exit:
*
*Exceptions:
*
*******************************************************************************/

static void __cdecl _CleanStr(StringPtr st, int fMacsBug)
{
        int     i;

        /* change semi-colons to periods (semi-colons hose MacsBug) */
        if (fMacsBug)
        {
            for (i = 0; i < StrLength(st); i++)
            {
                /* skip MB chars */
                if (_ismbblead(st[i+1]))
                {
                    i++;
                    continue;
                }

                if (st[i + 1] == ';')
                    st[i + 1] = '.';
            }
        }

        for (i = StrLength(st); i >= 1; i--)
        {
            /* if trail byte, stop processing */
            if (_ismbstrail(&st[1], &st[i]))
                break;

            /* remove trailing newlines */
            if (st[i] == '\n')
            {
                if (fMacsBug)
                    st[0]--;
            }
            /* remove trailing carriage returns */
            else if (st[i] == '\r')
            {
                st[0]--;
            }
            /* otherwise, stop processing */
            else
            {
                break;
            }
        }
}


/***
*void _ConfirmVCDebugger
*
*Purpose:
*       Determines if a 'WLMD' Gestalt selector is registered.
*
*Entry:
*
*Exit:
*       Current VC++ Debug Output function or NULL.
*
*Exceptions:
*
*******************************************************************************/

static UniversalProcPtr __cdecl _ConfirmVCDebugger(void)
{
        /* The VC++ Debug Ouput facilities are registered as "WLMD" */
        if (Gestalt('WLMD', (long*) &pfnGestaltDebugger) != noErr)
            pfnGestaltDebugger = NULL;
        return pfnGestaltDebugger;
}


/***
*int _IsMSVCDebugger
*
*Purpose:
*       Determines if a 'MSVC' Gestalt selector is registered, or if there
*       is a low level debugger in the system
*
*       Only call a macsbug-like debugger if it's going to be around to
*       handle the DebugStr
*
*Entry:
*
*Exit:
*       TRUE:   If MSVC debugger registered
*       FALSE:  Otherwise
*
*Exceptions:
*
*******************************************************************************/

static int __cdecl _IsLowLevelDebugger(void)
{
#define mskBeingDebugged 1
#define mskPreviousDebugger 2

        unsigned long caps;

        /* See if VC++ Debugger is running */
        if(Gestalt('MSVC', (long*) &caps) == noErr)
        {
            if((caps & mskBeingDebugged) || (caps & mskPreviousDebugger))
                return 1;
            else
                return 0;
        }
        /* See if MacsBug is running */
        else if (LMGetMacJmp() != NULL)
            return 1;
        else
            return 0;

#undef mskBeingDebugged
#undef mskPreviousDebugger
}


/***
*void _CrtOutputDebugString - output Debug String
*
*Purpose:
*       Does the actual output of a string to the debugger.
*
*Entry:
*       char * sz -- message to output
*
*Exit:
*
*Exceptions:
*
*******************************************************************************/

static void __cdecl _CrtOutputDebugString(char * sz)
{
        Str255      stDebug;
        long        cchTotal;
        short       cchCur;
        const char* pchCur;
        EventRecord er;

        _ConfirmVCDebugger();

        OSEventAvail(0, &er);

        cchTotal = strlen(sz);
        pchCur = sz;

        /* output string in edible portions */
        while (cchTotal > 0)
        {
            cchCur = (short) min(cchTotal, 253);
            _ASSERTE(cchCur > 0);

            /* put back orphaned lead byte */
            if (_ismbslead(pchCur, pchCur+cchCur-1))
                cchCur--;

            /* convert CString to PascalString */
            stDebug[0] = (unsigned char) cchCur;
            BlockMoveData(pchCur, &stDebug[1], cchCur);

            /* See if VC++ Debug Output facility is running */
            if (pfnGestaltDebugger != NULL)
            {
                _CleanStr(stDebug, 0);

                /* if the Control key is down, we break into MacsBug before
                   sending the string to the Gestalt debugger */
                if ((er.modifiers & controlKey) != 0)
                    Debugger();

                CallUniversalProc(pfnGestaltDebugger, uppGestaltDebugProcInfo, WLMD_STR, stDebug,
                        NULL, NULL);
            }
            /* See if VC++ Debugger or MacsBug is running */
            else if (_IsLowLevelDebugger())
            {
                short   cchSt;

                _CleanStr(stDebug, 1);

                /* _CleanStr may have changed the length of stDebug */
                cchSt = StrLength(stDebug);

                /* if the Control key is down, we always stop in the debugger */
                if ((er.modifiers & controlKey) == 0)
                {
                    stDebug[cchSt + 1] = ';';
                    stDebug[cchSt + 2] = 'g';
                    stDebug[0] += 2;
                }

                DebugStr(stDebug);
            }
            cchTotal -= cchCur;
            pchCur += cchCur;
        }
}

#endif  /* defined (_M_MPPC) */

#endif  /* _DEBUG */