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| author | alk3pInjection <webmaster@raspii.tech> | 2024-02-04 16:16:35 +0800 |
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| committer | alk3pInjection <webmaster@raspii.tech> | 2024-02-04 16:16:35 +0800 |
| commit | abdaadbcae30fe0c9a66c7516798279fdfd97750 (patch) | |
| tree | 00a54a6e25601e43876d03c1a4a12a749d4a914c /share/doc/gdb/Command-History.html | |
https://developer.arm.com/downloads/-/arm-gnu-toolchain-downloads
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diff --git a/share/doc/gdb/Command-History.html b/share/doc/gdb/Command-History.html new file mode 100644 index 0000000..96d1714 --- /dev/null +++ b/share/doc/gdb/Command-History.html @@ -0,0 +1,241 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> +<html> +<!-- Copyright (C) 1988-2023 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 5.1, http://www.gnu.org/software/texinfo/ --> +<head> +<title>Debugging with GDB: Command History</title> + +<meta name="description" content="Debugging with GDB: Command History"> +<meta name="keywords" content="Debugging with GDB: Command History"> +<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="Screen-Size.html#Screen-Size" rel="next" title="Screen Size"> +<link href="Editing.html#Editing" rel="previous" title="Editing"> +<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="Command-History"></a> +<div class="header"> +<p> +Next: <a href="Screen-Size.html#Screen-Size" accesskey="n" rel="next">Screen Size</a>, Previous: <a href="Editing.html#Editing" accesskey="p" rel="previous">Editing</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="Command-History-1"></a> +<h3 class="section">22.3 Command History</h3> +<a name="index-command-history"></a> + +<p><small>GDB</small> can keep track of the commands you type during your +debugging sessions, so that you can be certain of precisely what +happened. Use these commands to manage the <small>GDB</small> command +history facility. +</p> +<p><small>GDB</small> uses the <small>GNU</small> History library, a part of the Readline +package, to provide the history facility. +See <a href="Using-History-Interactively.html#Using-History-Interactively">Using History Interactively</a>, +for the detailed description of the History library. +</p> +<p>To issue a command to <small>GDB</small> without affecting certain aspects of +the state which is seen by users, prefix it with ‘<samp>server </samp>’ +(see <a href="Server-Prefix.html#Server-Prefix">Server Prefix</a>). This +means that this command will not affect the command history, nor will it +affect <small>GDB</small>’s notion of which command to repeat if <tt class="key">RET</tt> is +pressed on a line by itself. +</p> +<a name="index-server_002c-command-prefix"></a> +<p>The server prefix does not affect the recording of values into the value +history; to print a value without recording it into the value history, +use the <code>output</code> command instead of the <code>print</code> command. +</p> +<p>Here is the description of <small>GDB</small> commands related to command +history. +</p> +<dl compact="compact"> +<dd><a name="index-history-substitution"></a> +<a name="index-history-file"></a> +<a name="index-set-history-filename"></a> +<a name="index-GDBHISTFILE_002c-environment-variable"></a> +</dd> +<dt><code>set history filename <span class="roman">[</span><var>fname</var><span class="roman">]</span></code></dt> +<dd><p>Set the name of the <small>GDB</small> command history file to <var>fname</var>. +This is the file where <small>GDB</small> reads an initial command history +list, and where it writes the command history from this session when it +exits. You can access this list through history expansion or through +the history command editing characters listed below. This file defaults +to the value of the environment variable <code>GDBHISTFILE</code>, or to +<samp>./.gdb_history</samp> (<samp>./_gdb_history</samp> on MS-DOS) if this variable +is not set. +</p> +<p>The <code>GDBHISTFILE</code> environment variable is read after processing +any <small>GDB</small> initialization files (see <a href="Startup.html#Startup">Startup</a>) and after +processing any commands passed using command line options (for +example, <code>-ex</code>). +</p> +<p>If the <var>fname</var> argument is not given, or if the <code>GDBHISTFILE</code> +is the empty string then <small>GDB</small> will neither try to load an +existing history file, nor will it try to save the history on exit. +</p> +<a name="index-save-command-history"></a> +<a name="index-set-history-save"></a> +</dd> +<dt><code>set history save</code></dt> +<dt><code>set history save on</code></dt> +<dd><p>Record command history in a file, whose name may be specified with the +<code>set history filename</code> command. By default, this option is +disabled. The command history will be recorded when <small>GDB</small> +exits. If <code>set history filename</code> is set to the empty string then +history saving is disabled, even when <code>set history save</code> is +<code>on</code>. +</p> +</dd> +<dt><code>set history save off</code></dt> +<dd><p>Don’t record the command history into the file specified by <code>set +history filename</code> when <small>GDB</small> exits. +</p> +<a name="index-history-size"></a> +<a name="index-set-history-size"></a> +<a name="index-GDBHISTSIZE_002c-environment-variable"></a> +</dd> +<dt><code>set history size <var>size</var></code></dt> +<dt><code>set history size unlimited</code></dt> +<dd><p>Set the number of commands which <small>GDB</small> keeps in its history list. +This defaults to the value of the environment variable <code>GDBHISTSIZE</code>, or +to 256 if this variable is not set. Non-numeric values of <code>GDBHISTSIZE</code> +are ignored. If <var>size</var> is <code>unlimited</code> or if <code>GDBHISTSIZE</code> is +either a negative number or the empty string, then the number of commands +<small>GDB</small> keeps in the history list is unlimited. +</p> +<p>The <code>GDBHISTSIZE</code> environment variable is read after processing +any <small>GDB</small> initialization files (see <a href="Startup.html#Startup">Startup</a>) and after +processing any commands passed using command line options (for +example, <code>-ex</code>). +</p> +<a name="index-remove-duplicate-history"></a> +<a name="index-set-history-remove_002dduplicates"></a> +</dd> +<dt><code>set history remove-duplicates <var>count</var></code></dt> +<dt><code>set history remove-duplicates unlimited</code></dt> +<dd><p>Control the removal of duplicate history entries in the command history list. +If <var>count</var> is non-zero, <small>GDB</small> will look back at the last <var>count</var> +history entries and remove the first entry that is a duplicate of the current +entry being added to the command history list. If <var>count</var> is +<code>unlimited</code> then this lookbehind is unbounded. If <var>count</var> is 0, then +removal of duplicate history entries is disabled. +</p> +<p>Only history entries added during the current session are considered for +removal. This option is set to 0 by default. +</p> +</dd> +</dl> + +<p>History expansion assigns special meaning to the character <kbd>!</kbd>. +See <a href="Event-Designators.html#Event-Designators">Event Designators</a>, +for more details. +</p> +<a name="index-history-expansion_002c-turn-on_002foff"></a> +<p>Since <kbd>!</kbd> is also the logical not operator in C, history expansion +is off by default. If you decide to enable history expansion with the +<code>set history expansion on</code> command, you may sometimes need to +follow <kbd>!</kbd> (when it is used as logical not, in an expression) with +a space or a tab to prevent it from being expanded. The readline +history facilities do not attempt substitution on the strings +<kbd>!=</kbd> and <kbd>!(</kbd>, even when history expansion is enabled. +</p> +<p>The commands to control history expansion are: +</p> +<dl compact="compact"> +<dt><code>set history expansion on</code></dt> +<dt><code>set history expansion</code></dt> +<dd><a name="index-set-history-expansion"></a> +<p>Enable history expansion. History expansion is off by default. +</p> +</dd> +<dt><code>set history expansion off</code></dt> +<dd><p>Disable history expansion. +</p> +<a name="index-show-history"></a> +</dd> +<dt><code>show history</code></dt> +<dt><code>show history filename</code></dt> +<dt><code>show history save</code></dt> +<dt><code>show history size</code></dt> +<dt><code>show history expansion</code></dt> +<dd><p>These commands display the state of the <small>GDB</small> history parameters. +<code>show history</code> by itself displays all four states. +</p></dd> +</dl> + +<dl compact="compact"> +<dd><a name="index-show-commands"></a> +<a name="index-show-last-commands"></a> +<a name="index-display-command-history"></a> +</dd> +<dt><code>show commands</code></dt> +<dd><p>Display the last ten commands in the command history. +</p> +</dd> +<dt><code>show commands <var>n</var></code></dt> +<dd><p>Print ten commands centered on command number <var>n</var>. +</p> +</dd> +<dt><code>show commands +</code></dt> +<dd><p>Print ten commands just after the commands last printed. +</p></dd> +</dl> + +<hr> +<div class="header"> +<p> +Next: <a href="Screen-Size.html#Screen-Size" accesskey="n" rel="next">Screen Size</a>, Previous: <a href="Editing.html#Editing" accesskey="p" rel="previous">Editing</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> |