Question

当我在WinDbg中使用!htrace -diff来调试句柄泄漏时，我得到了许多不显示callstack的句柄（可能是泄漏的句柄）：

这可能是什么原因以及我有什么选择来进一步调试？

Handle = 0x000273e4 - OPEN
Thread ID = 0x00001190, Process ID = 0x0000114c

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Handle = 0x000273e0 - OPEN
Thread ID = 0x00001190, Process ID = 0x0000114c

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Handle = 0x000273dc - OPEN
Thread ID = 0x00001190, Process ID = 0x0000114c

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Handle = 0x000273d8 - OPEN
Thread ID = 0x00001190, Process ID = 0x0000114c

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Handle = 0x000273d4 - OPEN
Thread ID = 0x00001190, Process ID = 0x0000114c

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Handle = 0x000273d0 - OPEN
Thread ID = 0x00001190, Process ID = 0x0000114c

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Handle = 0x000273cc - OPEN
Thread ID = 0x00001190, Process ID = 0x0000114c

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Handle = 0x000273c8 - OPEN
Thread ID = 0x00001190, Process ID = 0x0000114c

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Handle = 0x000273c4 - OPEN
Thread ID = 0x00001190, Process ID = 0x0000114c

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Handle = 0x000273c0 - OPEN
Thread ID = 0x00001190, Process ID = 0x0000114c

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Handle = 0x000273bc - OPEN
Thread ID = 0x00001190, Process ID = 0x0000114c

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Handle = 0x000273b8 - OPEN
Thread ID = 0x00001190, Process ID = 0x0000114c

--------------------------------------
Handle = 0x000273b4 - OPEN
Thread ID = 0x00001190, Process ID = 0x0000114c

--------------------------------------
Handle = 0x000273b0 - OPEN
Thread ID = 0x00001190, Process ID = 0x0000114c

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Handle = 0x000273ac - OPEN
Thread ID = 0x00001190, Process ID = 0x0000114c

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Handle = 0x000273a8 - OPEN
Thread ID = 0x00001190, Process ID = 0x0000114c

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Handle = 0x000273a4 - OPEN
Thread ID = 0x00001190, Process ID = 0x0000114c

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更新：句柄泄漏似乎取决于图形驱动程序或图形卡。当我使用任何形式的WPF时它开始泄漏它只会在某些带有某些图形卡/驱动程序的Windows XP系统上泄漏。

Answer 1

通过ZwOpenProcess例程（http://msdn.microsoft.com/en-us/library/windows/hardware/ff567022(v=vs.85).aspx）在内核模式下执行调用，而不是ZwClose呼叫。然后把手泄漏。您没有看到callstack，因为它们仅在从用户模式（OpenProcess / CloseHandle）执行调用时可用。

在XP SP3上，似乎很难找到罪魁祸首。解决方案是使用操作系统中内置的“对象引用跟踪”功能，但此路径存在问题（有关详细参考，请参阅http://www.osronline.com/showthread.cfm?link=198302）。由于您发现此问题仅在存在特定视频卡时出现，您可以尝试联系供应商或检查更新版本的驱动程序。

！htrace显示没有callstack

1 个答案: