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core/com.nokia.carbide.cpp.compiler.doc.user/html/pragmas_x86/p_fill_stack.htm
author Deepak Modgil <Deepak.Modgil@Nokia.com>
Fri, 03 Apr 2009 23:33:03 +0100
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0//EN"><html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" />
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<meta http-equiv="Content-Style-Type" content="text/css" />
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<meta name="LASTUPDATED" content="06/17/05 11:09:43" />
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<title>fill_stack</title>
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<link rel="StyleSheet" href="../../book.css" type="text/css"/>
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</head>
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<body bgcolor="#FFFFFF">
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<h3>fill_stack</h3>
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<p>  Instructs the compiler to initialize locals to a fixed bit pattern (<span class="code">0xCC</span>) upon entry to a function.</p>
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<h5>Syntax</h5>
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  <p class="code">#pragma fill_stack on | off | reset</p>
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  <h5>Targets</h5>
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  Intel x86<br />
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  <h5>Remarks</h5>
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  <p>Use of this pragma helps to diagnose program failures or crashes caused by the use of uninitialized variables. I.e., a bit pattern of <span class="code">0xCC</span> is not a normally-encountered integer or floating-point value, and <span class="code">0xCCCCCCCC</span> is almost never a valide pointer value. If the program counter does point to such a variable, it will be &ldquo;executed&rdquo; as an <span class="code">int3</span> breakpoint.</p>
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  <p>This pragma does not correspond to any panel setting. To check this setting, use the <span class="code">__option (fill_stack)</span>. The default setting for is off at optimization level 0.<br />
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</p>
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  <div id="footer">Copyright &copy; 2009 Nokia Corporation and/or its subsidiary(-ies). All rights reserved. <br>License: <a href="http://www.eclipse.org/legal/epl-v10.html">http://www.eclipse.org/legal/epl-v10.html</a></div>
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FCL/sftools/dev/ide/carbidecpp