visus
/
toolchain-gcc-arm-embedded

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<!-- Copyright (C) 1988-2020 Free Software Foundation, Inc.

Permission is granted to copy, distribute and/or modify this document
under the terms of the GNU Free Documentation License, Version 1.3 or
any later version published by the Free Software Foundation; with the
Invariant Sections being "Free Software" and "Free Software Needs
Free Documentation", with the Front-Cover Texts being "A GNU Manual,"
and with the Back-Cover Texts as in (a) below.

(a) The FSF's Back-Cover Text is: "You are free to copy and modify
this GNU Manual.  Buying copies from GNU Press supports the FSF in
developing GNU and promoting software freedom." -->
<!-- Created by GNU Texinfo 6.5, http://www.gnu.org/software/texinfo/ -->
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Active Targets (Debugging with GDB)</title>

<meta name="description" content="Active Targets (Debugging with GDB)">
<meta name="keywords" content="Active Targets (Debugging with GDB)">
<meta name="resource-type" content="document">
<meta name="distribution" content="global">
<meta name="Generator" content="makeinfo">
<link href="index.html#Top" rel="start" title="Top">
<link href="Concept-Index.html#Concept-Index" rel="index" title="Concept Index">
<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
<link href="Targets.html#Targets" rel="up" title="Targets">
<link href="Target-Commands.html#Target-Commands" rel="next" title="Target Commands">
<link href="Targets.html#Targets" rel="prev" title="Targets">
<style type="text/css">
<!--
a.summary-letter {text-decoration: none}
blockquote.indentedblock {margin-right: 0em}
blockquote.smallindentedblock {margin-right: 0em; font-size: smaller}
blockquote.smallquotation {font-size: smaller}
div.display {margin-left: 3.2em}
div.example {margin-left: 3.2em}
div.lisp {margin-left: 3.2em}
div.smalldisplay {margin-left: 3.2em}
div.smallexample {margin-left: 3.2em}
div.smalllisp {margin-left: 3.2em}
kbd {font-style: oblique}
pre.display {font-family: inherit}
pre.format {font-family: inherit}
pre.menu-comment {font-family: serif}
pre.menu-preformatted {font-family: serif}
pre.smalldisplay {font-family: inherit; font-size: smaller}
pre.smallexample {font-size: smaller}
pre.smallformat {font-family: inherit; font-size: smaller}
pre.smalllisp {font-size: smaller}
span.nolinebreak {white-space: nowrap}
span.roman {font-family: initial; font-weight: normal}
span.sansserif {font-family: sans-serif; font-weight: normal}
ul.no-bullet {list-style: none}
-->
</style>


</head>

<body lang="en">
<a name="Active-Targets"></a>
<div class="header">
<p>
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> &nbsp; [<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>
</div>
<hr>
<a name="Active-Targets-1"></a>
<h3 class="section">19.1 Active Targets</h3>

<a name="index-stacking-targets"></a>
<a name="index-active-targets"></a>
<a name="index-multiple-targets"></a>

<p>There are multiple classes of targets such as: processes, executable files or
recording sessions.  Core files belong to the process class, making core file
and process mutually exclusive.  Otherwise, <small>GDB</small> can work concurrently
on multiple active targets, one in each class.  This allows you to (for
example) start a process and inspect its activity, while still having access to
the executable file after the process finishes.  Or if you start process
recording (see <a href="Reverse-Execution.html#Reverse-Execution">Reverse Execution</a>) and <code>reverse-step</code> there, you are
presented a virtual layer of the recording target, while the process target
remains stopped at the chronologically last point of the process execution.
</p>
<p>Use the <code>core-file</code> and <code>exec-file</code> commands to select a new core
file or executable target (see <a href="Files.html#Files">Commands to Specify Files</a>).  To
specify as a target a process that is already running, use the <code>attach</code>
command (see <a href="Attach.html#Attach">Debugging an Already-running Process</a>).
</p>


</body>
</html>