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96 lines
4.3 KiB
HTML
96 lines
4.3 KiB
HTML
<!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>Active Targets (Debugging with GDB)</title>
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<meta name="description" content="Active Targets (Debugging with GDB)">
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<meta name="keywords" content="Active Targets (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="Targets.html#Targets" rel="up" title="Targets">
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<link href="Target-Commands.html#Target-Commands" rel="next" title="Target Commands">
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<link href="Targets.html#Targets" rel="prev" title="Targets">
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</head>
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<body lang="en">
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<a name="Active-Targets"></a>
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<div class="header">
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<p>
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Next: <a href="Target-Commands.html#Target-Commands" accesskey="n" rel="next">Target Commands</a>, Up: <a href="Targets.html#Targets" accesskey="u" rel="up">Targets</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="Active-Targets-1"></a>
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<h3 class="section">19.1 Active Targets</h3>
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<a name="index-stacking-targets"></a>
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<a name="index-active-targets"></a>
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<a name="index-multiple-targets"></a>
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<p>There are multiple classes of targets such as: processes, executable files or
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recording sessions. Core files belong to the process class, making core file
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and process mutually exclusive. Otherwise, <small>GDB</small> can work concurrently
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on multiple active targets, one in each class. This allows you to (for
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example) start a process and inspect its activity, while still having access to
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the executable file after the process finishes. Or if you start process
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recording (see <a href="Reverse-Execution.html#Reverse-Execution">Reverse Execution</a>) and <code>reverse-step</code> there, you are
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presented a virtual layer of the recording target, while the process target
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remains stopped at the chronologically last point of the process execution.
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</p>
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<p>Use the <code>core-file</code> and <code>exec-file</code> commands to select a new core
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file or executable target (see <a href="Files.html#Files">Commands to Specify Files</a>). To
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specify as a target a process that is already running, use the <code>attach</code>
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command (see <a href="Attach.html#Attach">Debugging an Already-running Process</a>).
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</p>
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</body>
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</html>
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