hxassert.cpp

linux下的一款播放器

    if (z_nMultiAssertCount > 0)
    {
        // assert within assert (examine call stack to determine first one)
        HXDebugBreak();
        return FALSE;
    }
    z_nMultiAssertCount++;

/////////////////////////////////////////////////////////////////
//
// BEGIN: Platform specific portion of HXAssert(), namely, we 
// need to show some UI to tell us that an assertion has failed. 
// The rest of this function is cross-platform.
//
#if defined(_WIN32) || defined(_WINDOWS)

	// active popup window for the current thread
	HWND hWndParent = GetActiveWindow();
#if !defined(WIN32_PLATFORM_PSPC)
	if (hWndParent != NULL)
	{
            hWndParent = GetLastActivePopup(hWndParent);
	}
#endif /* !defined(WIN32_PLATFORM_PSPC) */
		
	// display the assert
#if !defined(WIN32_PLATFORM_PSPC)
	// we remove WM_QUIT because if it is in the queue then the message box
	// won't display
	MSG msg;
	BOOL bQuit = ::PeekMessage(&msg, NULL, WM_QUIT, WM_QUIT, PM_REMOVE);

	int nCode = ::MessageBox
            (
                hWndParent, 
                z_szAssertMessage,
                "Assertion Failed!",
                MB_TASKMODAL|
                MB_ICONHAND|MB_ABORTRETRYIGNORE|MB_DEFBUTTON3
#if defined(_WIN32)
                |MB_SETFOREGROUND
#endif
                );
	if (bQuit)
	    PostQuitMessage(msg.wParam);
#else /* !defined(WIN32_PLATFORM_PSPC) */
	int nCode = ::MessageBox
            (
                hWndParent, 
                OS_STRING(z_szAssertMessage),
                OS_STRING("Assertion Failed!"),
                MB_ICONHAND|MB_ABORTRETRYIGNORE
                );
#endif /* !defined(WIN32_PLATFORM_PSPC) */

#elif defined (_MACINTOSH)
        int nCode = HXCRT_ASSERT(z_szAssertMessage);

#elif defined (_UNIX)
        const char *debugopts;
        int debuglevel = 0;
        int nCode = IDIGNORE;
#if defined(_MAC_UNIX)
        debuglevel = 2; // default to something less extreme on Mac
#endif
        debugopts = getenv("HX_DEBUGLEVEL");
        if (debugopts != NULL)
        {
            debuglevel = atoi(debugopts);
        }
        switch(debuglevel)
        {
           case 1: /* debugger */
           {
               fprintf(stderr, "HX_ASSERT failed: %s\n", z_szAssertMessage );
               nCode = IDRETRY;
               break;
           }
           case 2: /* terminate */
           {
               fprintf(stderr, "HX_ASSERT failed: %s\n", z_szAssertMessage );
               nCode = IDIGNORE;
               break;

           }
           case 3: /* silent */
           {
               nCode = IDIGNORE;
               break;
           }
           case 4: /* interactive */
           {
               setvbuf(stdin, NULL, _IONBF, 0);
               fprintf(stderr, "HX_ASSERT failed: %s\n((d)ebug (i)gnore (a)bort)?  ", z_szAssertMessage );
               char input = '\n';
               while (input == '\n')
                   read(0, &input, 1);
               switch (input)
               {
                  case 'i':	            /* ignore */
                      nCode = IDIGNORE;
                      break;
                  case 'a':               /* abort */
                      abort();
                      break;
                  case 'd':
                  default:                /* debug */
                      nCode = IDRETRY;
                      break;
               }
               break;
           }
           case 0: /* terminate */
           default:
           {
               fprintf(stderr, "HX_ASSERT failed: %s\n", z_szAssertMessage );
               abort();
           }
        }
#endif

#if defined(_SYMBIAN)
    int nCode = IDRETRY;
    TRAPD(err, nCode = QueryAssertActionL(z_szAssertMessage));
#endif //_SYMBIAN        
       
#if defined(_OPENWAVE)
        int nCode = IDIGNORE;

// XXXSAB Fill this in!!!

# ifdef _OPENWAVE_SIMULATOR
        //What to do on the emulator.
# else
        //What to do on the device.
# endif        
#endif        
//
// END: Platform specific portion of HXAssert(). The rest of 
// this function is cross-platform.
//
/////////////////////////////////////////////////////////////////

            // cleanup
            z_nMultiAssertCount--;

            if (nCode == IDIGNORE)
            {
                return FALSE;   // ignore
            }

            if (nCode == IDRETRY)
            {
		return TRUE;
            }

            HXAbort();     // should not return (but otherwise HXDebugBreak)
            return TRUE;

};

/////////////////////////////////////////////////////////////////////////////
//
// HXAssertValidPointer: Helper function used by HX_ASSERT_VALID_PTR()
//
void STDMETHODCALLTYPE HXAssertValidPointer(const void* pVoid, const char* pszFileName, int nLine)
{
	if (pVoid == NULL)
	{
		if (HXAssertFailedLine("HX_ASSERT_VALID_PTR fails on NULL pointer",pszFileName,nLine))
		{
			HXDebugBreak();
		}
		return;     // quick escape
	}

	if (!HXIsValidAddress(pVoid))
	{
		if (HXAssertFailedLine("HX_ASSERT_VALID_PTR fails with illegal pointer.",pszFileName,nLine))
		{
			HXDebugBreak();
		}
		return;     // quick escape
	}
};

/////////////////////////////////////////////////////////////////////////////
//
// HXIsValidAddress: Helper function used by HXAssertValidPointer()
//
#ifdef _WIN16
// see comment in hxassert.h for problem with STDMETHODCALLTYPE in win16
BOOL far _cdecl        HXIsValidAddress(const void* lp, ULONG32 nBytes, BOOL bReadWrite)
#else
BOOL STDMETHODCALLTYPE HXIsValidAddress(const void* lp, ULONG32 nBytes, BOOL bReadWrite)
#endif
{

/////////////////////////////////////////////////////////////////
//
// BEGIN: Platform specific portion of HXIsValidAddress(), namely,
// we need to to check if a pointer is a valid pointer.
//
#if defined(_WIN32) || defined(_WINDOWS)
	// simple version using Win APIs for pointer validation.
	return	(
				(lp != NULL)
				 &&
				 !IsBadReadPtr(lp, (UINT)nBytes)
				 &&
				(!bReadWrite || !IsBadWritePtr((LPVOID)lp, (UINT)nBytes))
			);
#else
#  ifdef __MWERKS__
		return TRUE;
#  endif
#  ifdef _UNIX
		return lp != NULL;
#  endif
#  ifdef _SYMBIAN
		return lp != NULL;
#  endif
#  ifdef _OPENWAVE
		return lp != NULL;
#  endif
#endif
//
// END: Platform specific portion of HXIsValidAddress(). The rest 
// of this function is cross-platform.
//
/////////////////////////////////////////////////////////////////

}

#ifdef _WIN16
// see comment in hxassert.h for problem with STDMETHODCALLTYPE in win16
BOOL far _cdecl        HXIsValidString(const char* psz, int nLength)
#else
BOOL STDMETHODCALLTYPE HXIsValidString(const char* psz, int nLength)
#endif
{
	if (psz == NULL)
	{
		return FALSE;
	}

/////////////////////////////////////////////////////////////////
//
// BEGIN: Platform specific portion of HXIsValidString(), namely,
// we need to to check if a pointer is a valid string pointer.
//
#if defined(_WIN32) && !defined(WIN32_PLATFORM_PSPC)
	// simple version using Win APIs for pointer validation.
        return !IsBadStringPtr(psz, nLength);
#else
	return TRUE;
#endif
}

#if defined(_SYMBIAN) && !defined (__WINS__)
#include <e32std.h>
void HXDebugBreak()
{
    User::Invariant();
}
#elif defined(_OPENWAVE) && !defined(_OPENWAVE_SIMULATOR)
void HXDebugBreak()
{
    #error Figure out if HXDebugBreak() makes sense on target device...
}
#elif defined(_UNIX)
void HXDebugBreak() 
{
    static int debuggerpid = 0;
    pid_t pid = getpid();
    const char *pname = getenv("PROCESS_NAME");
    const char *pDebuggerProcess = getenv("HX_DEBUGGER");
    
    if (debuggerpid) 
    {
	kill(pid, SIGSTOP);
	return;
    }

    // This allows the user to override the debug command.  The command 
    // called will be given process name and pid arguments

    if (pDebuggerProcess)
    {
	char pCmdTemplate[1024], pCmd[1024]; /* Flawfinder: ignore */
	SafeSprintf(pCmdTemplate, 1024, "%s %%s %%d", pDebuggerProcess);
	SafeSprintf(pCmd, 1024, pCmdTemplate, pname? pname : "/dev/null", pid);
	system(pCmd);
	sleep(3);
        return;
    }

    debuggerpid = fork();
    if (debuggerpid)
    {
	sleep(3);
    }
    else
    {
        setsid();
        int kid;
        if (!(kid = fork()))
        {
            char buf[1024]; /* Flawfinder: ignore */
            sprintf(buf, "%d", pid); /* Flawfinder: ignore */

	    if (!pname)
	    {
		fprintf(stderr, "Need to set PROCESS_NAME to enable jit debugging\n");
                fflush(0);
		_exit(0);
	    }

            if (-1 == (execlp("xterm", "xterm", "-e", "gdb", "-nw", "-nx", pname, buf, NULL)))
            {
                fprintf(stderr, "failed to start debugger (%s)\n", strerror(errno));
                abort();
            }
        }
        else
        {
            int dummy;
            waitpid(kid, &dummy, 0);
            fflush(0);
            _exit(0);
        }
    }
}
#endif

#endif