aarch64-linux-gnu-4.9/share/doc/gdb/gdb/Messages_002fWarnings.html - toolchains/linux-x86/gcc - Git at Google

 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 <html>
 <!-- Copyright (C) 1988-2015 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 5.2, http://www.gnu.org/software/texinfo/ -->
 <head>
 <title>Debugging with GDB: Messages/Warnings</title>

 <meta name="description" content="Debugging with GDB: Messages/Warnings">
 <meta name="keywords" content="Debugging with GDB: Messages/Warnings">
 <meta name="resource-type" content="document">
 <meta name="distribution" content="global">
 <meta name="Generator" content="makeinfo">
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 <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="Controlling-GDB.html#Controlling-GDB" rel="up" title="Controlling GDB">
 <link href="Debugging-Output.html#Debugging-Output" rel="next" title="Debugging Output">
 <link href="Auto_002dloading-verbose-mode.html#Auto_002dloading-verbose-mode" rel="prev" title="Auto-loading verbose mode">
 <style type="text/css">
 <!--
 a.summary-letter {text-decoration: none}
 blockquote.smallquotation {font-size: smaller}
 div.display {margin-left: 3.2em}
 div.example {margin-left: 3.2em}
 div.indentedblock {margin-left: 3.2em}
 div.lisp {margin-left: 3.2em}
 div.smalldisplay {margin-left: 3.2em}
 div.smallexample {margin-left: 3.2em}
 div.smallindentedblock {margin-left: 3.2em; font-size: smaller}
 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.nocodebreak {white-space:nowrap}
 span.nolinebreak {white-space:nowrap}
 span.roman {font-family:serif; font-weight:normal}
 span.sansserif {font-family:sans-serif; font-weight:normal}
 ul.no-bullet {list-style: none}
 -->
 </style>


 </head>

 <body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000">
 <a name="Messages_002fWarnings"></a>
 <div class="header">
 <p>
 Next: <a href="Debugging-Output.html#Debugging-Output" accesskey="n" rel="next">Debugging Output</a>, Previous: <a href="Auto_002dloading.html#Auto_002dloading" accesskey="p" rel="prev">Auto-loading</a>, Up: <a href="Controlling-GDB.html#Controlling-GDB" accesskey="u" rel="up">Controlling GDB</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="Optional-Warnings-and-Messages"></a>
 <h3 class="section">22.8 Optional Warnings and Messages</h3>

 <a name="index-verbose-operation"></a>
 <a name="index-optional-warnings"></a>
 <p>By default, <small>GDB</small> is silent about its inner workings.  If you are
 running on a slow machine, you may want to use the <code>set verbose</code>
 command.  This makes <small>GDB</small> tell you when it does a lengthy
 internal operation, so you will not think it has crashed.
 </p>
 <p>Currently, the messages controlled by <code>set verbose</code> are those
 which announce that the symbol table for a source file is being read;
 see <code>symbol-file</code> in <a href="Files.html#Files">Commands to Specify Files</a>.
 </p>
 <dl compact="compact">
 <dd><a name="index-set-verbose"></a>
 </dd>
 <dt><code>set verbose on</code></dt>
 <dd><p>Enables <small>GDB</small> output of certain informational messages.
 </p>
 </dd>
 <dt><code>set verbose off</code></dt>
 <dd><p>Disables <small>GDB</small> output of certain informational messages.
 </p>
 <a name="index-show-verbose"></a>
 </dd>
 <dt><code>show verbose</code></dt>
 <dd><p>Displays whether <code>set verbose</code> is on or off.
 </p></dd>
 </dl>

 <p>By default, if <small>GDB</small> encounters bugs in the symbol table of an
 object file, it is silent; but if you are debugging a compiler, you may
 find this information useful (see <a href="Symbol-Errors.html#Symbol-Errors">Errors Reading
 Symbol Files</a>).
 </p>
 <dl compact="compact">
 <dd>
 <a name="index-set-complaints"></a>
 </dd>
 <dt><code>set complaints <var>limit</var></code></dt>
 <dd><p>Permits <small>GDB</small> to output <var>limit</var> complaints about each type of
 unusual symbols before becoming silent about the problem.  Set
 <var>limit</var> to zero to suppress all complaints; set it to a large number
 to prevent complaints from being suppressed.
 </p>
 <a name="index-show-complaints"></a>
 </dd>
 <dt><code>show complaints</code></dt>
 <dd><p>Displays how many symbol complaints <small>GDB</small> is permitted to produce.
 </p>
 </dd>
 </dl>

 <a name="confirmation-requests"></a><p>By default, <small>GDB</small> is cautious, and asks what sometimes seems to be a
 lot of stupid questions to confirm certain commands.  For example, if
 you try to run a program which is already running:
 </p>
 <div class="smallexample">
 <pre class="smallexample">(gdb) run
 The program being debugged has been started already.
 Start it from the beginning? (y or n)
 </pre></div>

 <p>If you are willing to unflinchingly face the consequences of your own
 commands, you can disable this &ldquo;feature&rdquo;:
 </p>
 <dl compact="compact">
 <dd>
 <a name="index-set-confirm"></a>
 <a name="index-flinching"></a>
 <a name="index-confirmation"></a>
 <a name="index-stupid-questions"></a>
 </dd>
 <dt><code>set confirm off</code></dt>
 <dd><p>Disables confirmation requests.  Note that running <small>GDB</small> with
 the <samp>--batch</samp> option (see <a href="Mode-Options.html#Mode-Options">-batch</a>) also
 automatically disables confirmation requests.
 </p>
 </dd>
 <dt><code>set confirm on</code></dt>
 <dd><p>Enables confirmation requests (the default).
 </p>
 <a name="index-show-confirm"></a>
 </dd>
 <dt><code>show confirm</code></dt>
 <dd><p>Displays state of confirmation requests.
 </p>
 </dd>
 </dl>

 <a name="index-command-tracing"></a>
 <p>If you need to debug user-defined commands or sourced files you may find it
 useful to enable <em>command tracing</em>.  In this mode each command will be
 printed as it is executed, prefixed with one or more &lsquo;<samp>+</samp>&rsquo; symbols, the
 quantity denoting the call depth of each command.
 </p>
 <dl compact="compact">
 <dd><a name="index-set-trace_002dcommands"></a>
 <a name="index-command-scripts_002c-debugging"></a>
 </dd>
 <dt><code>set trace-commands on</code></dt>
 <dd><p>Enable command tracing.
 </p></dd>
 <dt><code>set trace-commands off</code></dt>
 <dd><p>Disable command tracing.
 </p></dd>
 <dt><code>show trace-commands</code></dt>
 <dd><p>Display the current state of command tracing.
 </p></dd>
 </dl>

 <hr>
 <div class="header">
 <p>
 Next: <a href="Debugging-Output.html#Debugging-Output" accesskey="n" rel="next">Debugging Output</a>, Previous: <a href="Auto_002dloading.html#Auto_002dloading" accesskey="p" rel="prev">Auto-loading</a>, Up: <a href="Controlling-GDB.html#Controlling-GDB" accesskey="u" rel="up">Controlling GDB</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>


 </body>
 </html>
	<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
	<html>
	<!-- Copyright (C) 1988-2015 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 5.2, http://www.gnu.org/software/texinfo/ -->
	<head>
	<title>Debugging with GDB: Messages/Warnings</title>

	<meta name="description" content="Debugging with GDB: Messages/Warnings">
	<meta name="keywords" content="Debugging with GDB: Messages/Warnings">
	<meta name="resource-type" content="document">
	<meta name="distribution" content="global">
	<meta name="Generator" content="makeinfo">
	<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
	<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="Controlling-GDB.html#Controlling-GDB" rel="up" title="Controlling GDB">
	<link href="Debugging-Output.html#Debugging-Output" rel="next" title="Debugging Output">
	<link href="Auto_002dloading-verbose-mode.html#Auto_002dloading-verbose-mode" rel="prev" title="Auto-loading verbose mode">
	<style type="text/css">
	<!--
	a.summary-letter {text-decoration: none}
	blockquote.smallquotation {font-size: smaller}
	div.display {margin-left: 3.2em}
	div.example {margin-left: 3.2em}
	div.indentedblock {margin-left: 3.2em}
	div.lisp {margin-left: 3.2em}
	div.smalldisplay {margin-left: 3.2em}
	div.smallexample {margin-left: 3.2em}
	div.smallindentedblock {margin-left: 3.2em; font-size: smaller}
	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.nocodebreak {white-space:nowrap}
	span.nolinebreak {white-space:nowrap}
	span.roman {font-family:serif; font-weight:normal}
	span.sansserif {font-family:sans-serif; font-weight:normal}
	ul.no-bullet {list-style: none}
	-->
	</style>


	</head>

	<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000">
	<a name="Messages_002fWarnings"></a>
	<div class="header">
	<p>
	Next: <a href="Debugging-Output.html#Debugging-Output" accesskey="n" rel="next">Debugging Output</a>, Previous: <a href="Auto_002dloading.html#Auto_002dloading" accesskey="p" rel="prev">Auto-loading</a>, Up: <a href="Controlling-GDB.html#Controlling-GDB" accesskey="u" rel="up">Controlling GDB</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>
	</div>
	<hr>
	<a name="Optional-Warnings-and-Messages"></a>
	<h3 class="section">22.8 Optional Warnings and Messages</h3>

	<a name="index-verbose-operation"></a>
	<a name="index-optional-warnings"></a>
	<p>By default, <small>GDB</small> is silent about its inner workings. If you are
	running on a slow machine, you may want to use the <code>set verbose</code>
	command. This makes <small>GDB</small> tell you when it does a lengthy
	internal operation, so you will not think it has crashed.
	</p>
	<p>Currently, the messages controlled by <code>set verbose</code> are those
	which announce that the symbol table for a source file is being read;
	see <code>symbol-file</code> in <a href="Files.html#Files">Commands to Specify Files</a>.
	</p>
	<dl compact="compact">
	<dd><a name="index-set-verbose"></a>
	</dd>
	<dt><code>set verbose on</code></dt>
	<dd><p>Enables <small>GDB</small> output of certain informational messages.
	</p>
	</dd>
	<dt><code>set verbose off</code></dt>
	<dd><p>Disables <small>GDB</small> output of certain informational messages.
	</p>
	<a name="index-show-verbose"></a>
	</dd>
	<dt><code>show verbose</code></dt>
	<dd><p>Displays whether <code>set verbose</code> is on or off.
	</p></dd>
	</dl>

	<p>By default, if <small>GDB</small> encounters bugs in the symbol table of an
	object file, it is silent; but if you are debugging a compiler, you may
	find this information useful (see <a href="Symbol-Errors.html#Symbol-Errors">Errors Reading
	Symbol Files</a>).
	</p>
	<dl compact="compact">
	<dd>
	<a name="index-set-complaints"></a>
	</dd>
	<dt><code>set complaints <var>limit</var></code></dt>
	<dd><p>Permits <small>GDB</small> to output <var>limit</var> complaints about each type of
	unusual symbols before becoming silent about the problem. Set
	<var>limit</var> to zero to suppress all complaints; set it to a large number
	to prevent complaints from being suppressed.
	</p>
	<a name="index-show-complaints"></a>
	</dd>
	<dt><code>show complaints</code></dt>
	<dd><p>Displays how many symbol complaints <small>GDB</small> is permitted to produce.
	</p>
	</dd>
	</dl>

	<a name="confirmation-requests"></a><p>By default, <small>GDB</small> is cautious, and asks what sometimes seems to be a
	lot of stupid questions to confirm certain commands. For example, if
	you try to run a program which is already running:
	</p>
	<div class="smallexample">
	<pre class="smallexample">(gdb) run
	The program being debugged has been started already.
	Start it from the beginning? (y or n)
	</pre></div>

	<p>If you are willing to unflinchingly face the consequences of your own
	commands, you can disable this “feature”:
	</p>
	<dl compact="compact">
	<dd>
	<a name="index-set-confirm"></a>
	<a name="index-flinching"></a>
	<a name="index-confirmation"></a>
	<a name="index-stupid-questions"></a>
	</dd>
	<dt><code>set confirm off</code></dt>
	<dd><p>Disables confirmation requests. Note that running <small>GDB</small> with
	the <samp>--batch</samp> option (see <a href="Mode-Options.html#Mode-Options">-batch</a>) also
	automatically disables confirmation requests.
	</p>
	</dd>
	<dt><code>set confirm on</code></dt>
	<dd><p>Enables confirmation requests (the default).
	</p>
	<a name="index-show-confirm"></a>
	</dd>
	<dt><code>show confirm</code></dt>
	<dd><p>Displays state of confirmation requests.
	</p>
	</dd>
	</dl>

	<a name="index-command-tracing"></a>
	<p>If you need to debug user-defined commands or sourced files you may find it
	useful to enable <em>command tracing</em>. In this mode each command will be
	printed as it is executed, prefixed with one or more ‘<samp>+</samp>’ symbols, the
	quantity denoting the call depth of each command.
	</p>
	<dl compact="compact">
	<dd><a name="index-set-trace_002dcommands"></a>
	<a name="index-command-scripts_002c-debugging"></a>
	</dd>
	<dt><code>set trace-commands on</code></dt>
	<dd><p>Enable command tracing.
	</p></dd>
	<dt><code>set trace-commands off</code></dt>
	<dd><p>Disable command tracing.
	</p></dd>
	<dt><code>show trace-commands</code></dt>
	<dd><p>Display the current state of command tracing.
	</p></dd>
	</dl>

	<hr>
	<div class="header">
	<p>
	Next: <a href="Debugging-Output.html#Debugging-Output" accesskey="n" rel="next">Debugging Output</a>, Previous: <a href="Auto_002dloading.html#Auto_002dloading" accesskey="p" rel="prev">Auto-loading</a>, Up: <a href="Controlling-GDB.html#Controlling-GDB" accesskey="u" rel="up">Controlling GDB</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>
	</div>



	</body>
	</html>