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145 lines
6.2 KiB
HTML
145 lines
6.2 KiB
HTML
4 years ago
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<!-- Copyright (C) 1988-2019 Free Software Foundation, Inc.
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Permission is granted to copy, distribute and/or modify this document
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under the terms of the GNU Free Documentation License, Version 1.3 or
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any later version published by the Free Software Foundation; with the
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Invariant Sections being "Free Software" and "Free Software Needs
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Free Documentation", with the Front-Cover Texts being "A GNU Manual,"
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and with the Back-Cover Texts as in (a) below.
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(a) The FSF's Back-Cover Text is: "You are free to copy and modify
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this GNU Manual. Buying copies from GNU Press supports the FSF in
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developing GNU and promoting software freedom." -->
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<!-- Created by GNU Texinfo 6.4, http://www.gnu.org/software/texinfo/ -->
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<head>
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<title>Method Names in Commands (Debugging with GDB)</title>
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<meta name="description" content="Method Names in Commands (Debugging with GDB)">
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<meta name="keywords" content="Method Names in Commands (Debugging with GDB)">
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<meta name="resource-type" content="document">
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<meta name="distribution" content="global">
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<meta name="Generator" content="makeinfo">
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<link href="index.html#Top" rel="start" title="Top">
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<link href="Concept-Index.html#Concept-Index" rel="index" title="Concept Index">
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="Objective_002dC.html#Objective_002dC" rel="up" title="Objective-C">
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<link href="The-Print-Command-with-Objective_002dC.html#The-Print-Command-with-Objective_002dC" rel="next" title="The Print Command with Objective-C">
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<link href="Objective_002dC.html#Objective_002dC" rel="prev" title="Objective-C">
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<style type="text/css">
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-->
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</style>
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</head>
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<body lang="en">
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<a name="Method-Names-in-Commands"></a>
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<div class="header">
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<p>
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Next: <a href="The-Print-Command-with-Objective_002dC.html#The-Print-Command-with-Objective_002dC" accesskey="n" rel="next">The Print Command with Objective-C</a>, Up: <a href="Objective_002dC.html#Objective_002dC" accesskey="u" rel="up">Objective-C</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p>
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</div>
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<hr>
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<a name="Method-Names-in-Commands-1"></a>
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<h4 class="subsubsection">15.4.4.1 Method Names in Commands</h4>
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<p>The following commands have been extended to accept Objective-C method
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names as line specifications:
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</p>
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<a name="index-clear_002c-and-Objective_002dC"></a>
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<a name="index-break_002c-and-Objective_002dC"></a>
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<a name="index-info-line_002c-and-Objective_002dC"></a>
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<a name="index-jump_002c-and-Objective_002dC"></a>
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<a name="index-list_002c-and-Objective_002dC"></a>
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<ul>
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<li> <code>clear</code>
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</li><li> <code>break</code>
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</li><li> <code>info line</code>
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</li><li> <code>jump</code>
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</li><li> <code>list</code>
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</li></ul>
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<p>A fully qualified Objective-C method name is specified as
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</p>
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<div class="smallexample">
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<pre class="smallexample">-[<var>Class</var> <var>methodName</var>]
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</pre></div>
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<p>where the minus sign is used to indicate an instance method and a
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plus sign (not shown) is used to indicate a class method. The class
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name <var>Class</var> and method name <var>methodName</var> are enclosed in
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brackets, similar to the way messages are specified in Objective-C
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source code. For example, to set a breakpoint at the <code>create</code>
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instance method of class <code>Fruit</code> in the program currently being
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debugged, enter:
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</p>
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<div class="smallexample">
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<pre class="smallexample">break -[Fruit create]
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</pre></div>
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<p>To list ten program lines around the <code>initialize</code> class method,
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enter:
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</p>
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<div class="smallexample">
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<pre class="smallexample">list +[NSText initialize]
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</pre></div>
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<p>In the current version of <small>GDB</small>, the plus or minus sign is
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required. In future versions of <small>GDB</small>, the plus or minus
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sign will be optional, but you can use it to narrow the search. It
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is also possible to specify just a method name:
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</p>
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<div class="smallexample">
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<pre class="smallexample">break create
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</pre></div>
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<p>You must specify the complete method name, including any colons. If
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your program’s source files contain more than one <code>create</code> method,
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you’ll be presented with a numbered list of classes that implement that
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method. Indicate your choice by number, or type ‘<samp>0</samp>’ to exit if
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none apply.
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</p>
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<p>As another example, to clear a breakpoint established at the
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<code>makeKeyAndOrderFront:</code> method of the <code>NSWindow</code> class, enter:
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</p>
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<div class="smallexample">
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<pre class="smallexample">clear -[NSWindow makeKeyAndOrderFront:]
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</pre></div>
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<hr>
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<div class="header">
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<p>
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Next: <a href="The-Print-Command-with-Objective_002dC.html#The-Print-Command-with-Objective_002dC" accesskey="n" rel="next">The Print Command with Objective-C</a>, Up: <a href="Objective_002dC.html#Objective_002dC" accesskey="u" rel="up">Objective-C</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p>
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</div>
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</body>
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</html>
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