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diff --git a/share/doc/gdb/Explicit-Locations.html b/share/doc/gdb/Explicit-Locations.html new file mode 100644 index 0000000..4173488 --- /dev/null +++ b/share/doc/gdb/Explicit-Locations.html @@ -0,0 +1,157 @@ +<!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: Explicit Locations</title> + +<meta name="description" content="Debugging with GDB: Explicit Locations"> +<meta name="keywords" content="Debugging with GDB: Explicit Locations"> +<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="Location-Specifications.html#Location-Specifications" rel="up" title="Location Specifications"> +<link href="Address-Locations.html#Address-Locations" rel="next" title="Address Locations"> +<link href="Linespec-Locations.html#Linespec-Locations" rel="previous" title="Linespec Locations"> +<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="Explicit-Locations"></a> +<div class="header"> +<p> +Next: <a href="Address-Locations.html#Address-Locations" accesskey="n" rel="next">Address Locations</a>, Previous: <a href="Linespec-Locations.html#Linespec-Locations" accesskey="p" rel="previous">Linespec Locations</a>, Up: <a href="Location-Specifications.html#Location-Specifications" accesskey="u" rel="up">Location Specifications</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="Explicit-Locations-1"></a> +<h4 class="subsection">9.2.2 Explicit Locations</h4> +<a name="index-explicit-locations"></a> + +<p><em>Explicit locations</em> allow the user to directly specify the source +location’s parameters using option-value pairs. +</p> +<p>Explicit locations are useful when several functions, labels, or +file names have the same name (base name for files) in the program’s +sources. In these cases, explicit locations point to the source +line you meant more accurately and unambiguously. Also, using +explicit locations might be faster in large programs. +</p> +<p>For example, the linespec ‘<samp>foo:bar</samp>’ may refer to a function <code>bar</code> +defined in the file named <samp>foo</samp> or the label <code>bar</code> in a function +named <code>foo</code>. <small>GDB</small> must search either the file system or +the symbol table to know. +</p> +<p>The list of valid explicit location options is summarized in the +following table: +</p> +<dl compact="compact"> +<dt><code>-source <var>filename</var></code></dt> +<dd><p>The value specifies the source file name. To differentiate between +files with the same base name, prepend as many directories as is necessary +to uniquely identify the desired file, e.g., <samp>foo/bar/baz.c</samp>. Otherwise +<small>GDB</small> will use the first file it finds with the given base +name. This option requires the use of either <code>-function</code> or <code>-line</code>. +</p> +</dd> +<dt><code>-function <var>function</var></code></dt> +<dd><p>The value specifies the name of a function. Operations +on function locations unmodified by other options (such as <code>-label</code> +or <code>-line</code>) refer to the line that begins the body of the function. +In C, for example, this is the line with the open brace. +</p> +<p>By default, in C<tt>++</tt> and Ada, <var>function</var> is interpreted as +specifying all functions named <var>function</var> in all scopes. For +C<tt>++</tt>, this means in all namespaces and classes. For Ada, this +means in all packages. +</p> +<p>For example, assuming a program with C<tt>++</tt> symbols named +<code>A::B::func</code> and <code>B::func</code>, both commands <kbd>break <span class="nolinebreak">-function</span> func</kbd><!-- /@w --> and <kbd>break <span class="nolinebreak">-function</span> B::func</kbd><!-- /@w --> set a +breakpoint on both symbols. +</p> +<p>You can use the <kbd>-qualified</kbd> flag to override this (see below). +</p> +</dd> +<dt><code>-qualified</code></dt> +<dd> +<p>This flag makes <small>GDB</small> interpret a function name specified with +<kbd>-function</kbd> as a complete fully-qualified name. +</p> +<p>For example, assuming a C<tt>++</tt> program with symbols named +<code>A::B::func</code> and <code>B::func</code>, the <kbd>break <span class="nolinebreak">-qualified</span> <span class="nolinebreak">-function</span> B::func</kbd><!-- /@w --> command sets a breakpoint on <code>B::func</code>, only. +</p> +<p>(Note: the <kbd>-qualified</kbd> option can precede a linespec as well +(see <a href="Linespec-Locations.html#Linespec-Locations">Linespec Locations</a>), so the particular example above could be +simplified as <kbd>break <span class="nolinebreak">-qualified</span> B::func</kbd><!-- /@w -->.) +</p> +</dd> +<dt><code>-label <var>label</var></code></dt> +<dd><p>The value specifies the name of a label. When the function +name is not specified, the label is searched in the function of the currently +selected stack frame. +</p> +</dd> +<dt><code>-line <var>number</var></code></dt> +<dd><p>The value specifies a line offset for the location. The offset may either +be absolute (<code>-line 3</code>) or relative (<code>-line +3</code>), depending on +the command. When specified without any other options, the line offset is +relative to the current line. +</p></dd> +</dl> + +<p>Explicit location options may be abbreviated by omitting any non-unique +trailing characters from the option name, e.g., <kbd>break <span class="nolinebreak">-s</span> main.c <span class="nolinebreak">-li</span> 3</kbd><!-- /@w -->. +</p> +<hr> +<div class="header"> +<p> +Next: <a href="Address-Locations.html#Address-Locations" accesskey="n" rel="next">Address Locations</a>, Previous: <a href="Linespec-Locations.html#Linespec-Locations" accesskey="p" rel="previous">Linespec Locations</a>, Up: <a href="Location-Specifications.html#Location-Specifications" accesskey="u" rel="up">Location Specifications</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> |