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78 lines
2.0 KiB
78 lines
2.0 KiB
//====================================================================
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// Debugging memory problems.
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//====================================================================
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#undef LocalAlloc
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#undef LocalReAlloc
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#undef LocalFree
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#define CBALLOCEXTRA (sizeof(LPARAM)+sizeof(UINT))
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#define HMEM2PTR(hMem,i) (((BYTE*)hMem)+i)
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void _StoreSigniture(HLOCAL hMem, UINT uByte, LPARAM lParam)
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{
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if (hMem)
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{
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UINT uSize = LocalSize(hMem);
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Assert(uSize>=uByte+CBALLOCEXTRA);
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*(UINT*)HMEM2PTR(hMem, uSize-sizeof(UINT)) = uByte;
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*(LPARAM*)HMEM2PTR(hMem, uByte) = lParam;
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}
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}
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UINT _ValidateLocalMem(HLOCAL hMem, LPARAM lParam, LPCSTR pszText)
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{
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UINT uByte = 0;
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if (hMem)
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{
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UINT uSize = LocalSize(hMem);
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if (uSize)
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{
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LPARAM lParamStored;
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uByte = *(UINT*)HMEM2PTR(hMem, uSize-sizeof(UINT));
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AssertMsg(uByte+CBALLOCEXTRA <= uSize,
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"cm ASSERT! Bogus uByte %d (%s for %x)",
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uByte, pszText, hMem);
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lParamStored = *(LPARAM*)HMEM2PTR(hMem, uByte);
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AssertMsg(lParamStored==lParam, "cm ASSERT! Bad Signiture %x (%s for %x)",
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lParamStored, pszText, hMem);
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}
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else
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{
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AssertMsg(0, "cm ASSERT! LocalSize is zero (%s for %x)",
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pszText, hMem);
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}
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}
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return uByte;
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}
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HLOCAL WINAPI DebugLocalAlloc(UINT uFlags, UINT uBytes)
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{
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HLOCAL hMem = LocalAlloc(uFlags, uBytes+CBALLOCEXTRA);
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_StoreSigniture(hMem, uBytes, (LPARAM)hMem);
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return hMem;
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}
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HLOCAL WINAPI DebugLocalReAlloc(HLOCAL hMem, UINT uBytes, UINT uFlags)
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{
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_ValidateLocalMem(hMem, (LPARAM)hMem, "LocalReAlloc");
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hMem = LocalReAlloc(hMem, uBytes+CBALLOCEXTRA, uFlags);
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_StoreSigniture(hMem, uBytes, (LPARAM)hMem);
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return hMem;
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}
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HLOCAL WINAPI DebugLocalFree( HLOCAL hMem )
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{
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UINT uBytes = _ValidateLocalMem(hMem, (LPARAM)hMem, "LocalFree");
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if (uBytes)
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{
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_StoreSigniture(hMem, uBytes, (LPARAM)0xDDDDDDDDL);
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}
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else
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{
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AssertMsg(0, "cm ASSERT! LocalFree _ValidateLocalMem returned 0 for %x", hMem);
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}
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return LocalFree(hMem);
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}
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