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POWhy SetUnhandledExceptionFilter cannot capture some exception but AddVectoredExceptionHandler can do
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  1. POWhy SetUnhandledExceptionFilter cannot capture some exception but AddVectoredExceptionHandler can do
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    copied!<p>I have experienced a problem that the function I passed to the <a href="http://msdn.microsoft.com/en-us/library/windows/desktop/ms680634%28v=vs.85%29.aspx">SetUnhandledExceptionFilter</a> didn't get called when the exception code c0000374 raising. But it works fine with the exception code c0000005. Then I tried to use the <a href="http://msdn.microsoft.com/en-us/library/windows/desktop/ms679274%28v=vs.85%29.aspx">AddVectoredExceptionHandler</a> instead, and it didn't have the problem, the handler function get called correctly.</p> <p>Is it the API bug? Can I use AddVectoredExceptionHandler instead of SetUnhandledExceptionFilter everywhere?</p> <p>The both functions work correctly with</p> <pre><code>// Exception code c0000005 int* p1 = NULL; *p1 = 99; </code></pre> <p>Only AddVectoredExceptionHandler can capture this exception. (To prove it doesn't depend on the runtime library, I raise the exception manually and it results the same.)</p> <pre><code>// Exception code c0000374 RaiseException(0xc0000374, 0, 0, NULL); </code></pre> <p>Test program.</p> <pre><code>#include &lt;tchar.h&gt; #include &lt;fstream&gt; #include &lt;Windows.h&gt; LONG WINAPI VectoredExceptionHandler(PEXCEPTION_POINTERS pExceptionInfo) { std::ofstream f; f.open("VectoredExceptionHandler.txt", std::ios::out | std::ios::trunc); f &lt;&lt; std::hex &lt;&lt; pExceptionInfo-&gt;ExceptionRecord-&gt;ExceptionCode &lt;&lt; std::endl; f.close(); return EXCEPTION_CONTINUE_SEARCH; } LONG WINAPI TopLevelExceptionHandler(PEXCEPTION_POINTERS pExceptionInfo) { std::ofstream f; f.open("TopLevelExceptionHandler.txt", std::ios::out | std::ios::trunc); f &lt;&lt; std::hex &lt;&lt; pExceptionInfo-&gt;ExceptionRecord-&gt;ExceptionCode &lt;&lt; std::endl; f.close(); return EXCEPTION_CONTINUE_SEARCH; } int _tmain(int argc, _TCHAR* argv[]) { AddVectoredExceptionHandler(1, VectoredExceptionHandler); SetUnhandledExceptionFilter(TopLevelExceptionHandler); // Exception code c0000374 RaiseException(0xc0000374, 0, 0, NULL); // Exception code c0000005 // int* p1 = NULL; // *p1 = 99; return 0; } </code></pre>
 

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