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diff --git a/share/doc/gdb/Breakpoints.html b/share/doc/gdb/Breakpoints.html new file mode 100644 index 0000000..3499c32 --- /dev/null +++ b/share/doc/gdb/Breakpoints.html @@ -0,0 +1,168 @@ +<!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: Breakpoints</title> + +<meta name="description" content="Debugging with GDB: Breakpoints"> +<meta name="keywords" content="Debugging with GDB: Breakpoints"> +<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="Stopping.html#Stopping" rel="up" title="Stopping"> +<link href="Set-Breaks.html#Set-Breaks" rel="next" title="Set Breaks"> +<link href="Stopping.html#Stopping" rel="previous" title="Stopping"> +<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="Breakpoints"></a> +<div class="header"> +<p> +Next: <a href="Continuing-and-Stepping.html#Continuing-and-Stepping" accesskey="n" rel="next">Continuing and Stepping</a>, Up: <a href="Stopping.html#Stopping" accesskey="u" rel="up">Stopping</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="Breakpoints_002c-Watchpoints_002c-and-Catchpoints"></a> +<h3 class="section">5.1 Breakpoints, Watchpoints, and Catchpoints</h3> + +<a name="index-breakpoints"></a> +<p>A <em>breakpoint</em> makes your program stop whenever a certain point in +the program is reached. For each breakpoint, you can add conditions to +control in finer detail whether your program stops. You can set +breakpoints with the <code>break</code> command and its variants (see <a href="Set-Breaks.html#Set-Breaks">Setting Breakpoints</a>), to specify the place where your program +should stop by line number, function name or exact address in the +program. +</p> +<p>On some systems, you can set breakpoints in shared libraries before +the executable is run. +</p> +<a name="index-watchpoints"></a> +<a name="index-data-breakpoints"></a> +<a name="index-memory-tracing"></a> +<a name="index-breakpoint-on-memory-address"></a> +<a name="index-breakpoint-on-variable-modification"></a> +<p>A <em>watchpoint</em> is a special breakpoint that stops your program +when the value of an expression changes. The expression may be a value +of a variable, or it could involve values of one or more variables +combined by operators, such as ‘<samp>a + b</samp>’. This is sometimes called +<em>data breakpoints</em>. You must use a different command to set +watchpoints (see <a href="Set-Watchpoints.html#Set-Watchpoints">Setting Watchpoints</a>), but aside +from that, you can manage a watchpoint like any other breakpoint: you +enable, disable, and delete both breakpoints and watchpoints using the +same commands. +</p> +<p>You can arrange to have values from your program displayed automatically +whenever <small>GDB</small> stops at a breakpoint. See <a href="Auto-Display.html#Auto-Display">Automatic Display</a>. +</p> +<a name="index-catchpoints"></a> +<a name="index-breakpoint-on-events"></a> +<p>A <em>catchpoint</em> is another special breakpoint that stops your program +when a certain kind of event occurs, such as the throwing of a C<tt>++</tt> +exception or the loading of a library. As with watchpoints, you use a +different command to set a catchpoint (see <a href="Set-Catchpoints.html#Set-Catchpoints">Setting +Catchpoints</a>), but aside from that, you can manage a catchpoint like any +other breakpoint. (To stop when your program receives a signal, use the +<code>handle</code> command; see <a href="Signals.html#Signals">Signals</a>.) +</p> +<a name="index-breakpoint-numbers"></a> +<a name="index-numbers-for-breakpoints"></a> +<p><small>GDB</small> assigns a number to each breakpoint, watchpoint, or +catchpoint when you create it; these numbers are successive integers +starting with one. In many of the commands for controlling various +features of breakpoints you use the breakpoint number to say which +breakpoint you want to change. Each breakpoint may be <em>enabled</em> or +<em>disabled</em>; if disabled, it has no effect on your program until you +enable it again. +</p> +<a name="index-breakpoint-ranges"></a> +<a name="index-breakpoint-lists"></a> +<a name="index-ranges-of-breakpoints"></a> +<a name="index-lists-of-breakpoints"></a> +<p>Some <small>GDB</small> commands accept a space-separated list of breakpoints +on which to operate. A list element can be either a single breakpoint number, +like ‘<samp>5</samp>’, or a range of such numbers, like ‘<samp>5-7</samp>’. +When a breakpoint list is given to a command, all breakpoints in that list +are operated on. +</p> +<table class="menu" border="0" cellspacing="0"> +<tr><td align="left" valign="top">• <a href="Set-Breaks.html#Set-Breaks" accesskey="1">Set Breaks</a>:</td><td> </td><td align="left" valign="top">Setting breakpoints +</td></tr> +<tr><td align="left" valign="top">• <a href="Set-Watchpoints.html#Set-Watchpoints" accesskey="2">Set Watchpoints</a>:</td><td> </td><td align="left" valign="top">Setting watchpoints +</td></tr> +<tr><td align="left" valign="top">• <a href="Set-Catchpoints.html#Set-Catchpoints" accesskey="3">Set Catchpoints</a>:</td><td> </td><td align="left" valign="top">Setting catchpoints +</td></tr> +<tr><td align="left" valign="top">• <a href="Delete-Breaks.html#Delete-Breaks" accesskey="4">Delete Breaks</a>:</td><td> </td><td align="left" valign="top">Deleting breakpoints +</td></tr> +<tr><td align="left" valign="top">• <a href="Disabling.html#Disabling" accesskey="5">Disabling</a>:</td><td> </td><td align="left" valign="top">Disabling breakpoints +</td></tr> +<tr><td align="left" valign="top">• <a href="Conditions.html#Conditions" accesskey="6">Conditions</a>:</td><td> </td><td align="left" valign="top">Break conditions +</td></tr> +<tr><td align="left" valign="top">• <a href="Break-Commands.html#Break-Commands" accesskey="7">Break Commands</a>:</td><td> </td><td align="left" valign="top">Breakpoint command lists +</td></tr> +<tr><td align="left" valign="top">• <a href="Dynamic-Printf.html#Dynamic-Printf" accesskey="8">Dynamic Printf</a>:</td><td> </td><td align="left" valign="top">Dynamic printf +</td></tr> +<tr><td align="left" valign="top">• <a href="Save-Breakpoints.html#Save-Breakpoints" accesskey="9">Save Breakpoints</a>:</td><td> </td><td align="left" valign="top">How to save breakpoints in a file +</td></tr> +<tr><td align="left" valign="top">• <a href="Static-Probe-Points.html#Static-Probe-Points">Static Probe Points</a>:</td><td> </td><td align="left" valign="top">Listing static probe points +</td></tr> +<tr><td align="left" valign="top">• <a href="Error-in-Breakpoints.html#Error-in-Breakpoints">Error in Breakpoints</a>:</td><td> </td><td align="left" valign="top">“Cannot insert breakpoints” +</td></tr> +<tr><td align="left" valign="top">• <a href="Breakpoint_002drelated-Warnings.html#Breakpoint_002drelated-Warnings">Breakpoint-related Warnings</a>:</td><td> </td><td align="left" valign="top">“Breakpoint address adjusted...” +</td></tr> +</table> + +<hr> +<div class="header"> +<p> +Next: <a href="Continuing-and-Stepping.html#Continuing-and-Stepping" accesskey="n" rel="next">Continuing and Stepping</a>, Up: <a href="Stopping.html#Stopping" accesskey="u" rel="up">Stopping</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> |