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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/Value-Sizes.html | |
https://developer.arm.com/downloads/-/arm-gnu-toolchain-downloads
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diff --git a/share/doc/gdb/Value-Sizes.html b/share/doc/gdb/Value-Sizes.html new file mode 100644 index 0000000..be3c575 --- /dev/null +++ b/share/doc/gdb/Value-Sizes.html @@ -0,0 +1,118 @@ +<!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: Value Sizes</title> + +<meta name="description" content="Debugging with GDB: Value Sizes"> +<meta name="keywords" content="Debugging with GDB: Value Sizes"> +<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="Data.html#Data" rel="up" title="Data"> +<link href="Optimized-Code.html#Optimized-Code" rel="next" title="Optimized Code"> +<link href="Searching-Memory.html#Searching-Memory" rel="previous" title="Searching Memory"> +<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="Value-Sizes"></a> +<div class="header"> +<p> +Previous: <a href="Searching-Memory.html#Searching-Memory" accesskey="p" rel="previous">Searching Memory</a>, Up: <a href="Data.html#Data" accesskey="u" rel="up">Data</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="Value-Sizes-1"></a> +<h3 class="section">10.24 Value Sizes</h3> + +<p>Whenever <small>GDB</small> prints a value memory will be allocated within +<small>GDB</small> to hold the contents of the value. It is possible in +some languages with dynamic typing systems, that an invalid program +may indicate a value that is incorrectly large, this in turn may cause +<small>GDB</small> to try and allocate an overly large amount of memory. +</p> +<dl compact="compact"> +<dd><a name="index-set-max_002dvalue_002dsize"></a> +</dd> +<dt><code>set max-value-size <var>bytes</var></code></dt> +<dt><code>set max-value-size unlimited</code></dt> +<dd><p>Set the maximum size of memory that <small>GDB</small> will allocate for the +contents of a value to <var>bytes</var>, trying to display a value that +requires more memory than that will result in an error. +</p> +<p>Setting this variable does not effect values that have already been +allocated within <small>GDB</small>, only future allocations. +</p> +<p>There’s a minimum size that <code>max-value-size</code> can be set to in +order that <small>GDB</small> can still operate correctly, this minimum is +currently 16 bytes. +</p> +<p>The limit applies to the results of some subexpressions as well as to +complete expressions. For example, an expression denoting a simple +integer component, such as <code>x.y.z</code>, may fail if the size of +<var>x.y</var> is dynamic and exceeds <var>bytes</var>. On the other hand, +<small>GDB</small> is sometimes clever; the expression <code>A[i]</code>, where +<var>A</var> is an array variable with non-constant size, will generally +succeed regardless of the bounds on <var>A</var>, as long as the component +size is less than <var>bytes</var>. +</p> +<p>The default value of <code>max-value-size</code> is currently 64k. +</p> +<a name="index-show-max_002dvalue_002dsize"></a> +</dd> +<dt><code>show max-value-size</code></dt> +<dd><p>Show the maximum size of memory, in bytes, that <small>GDB</small> will +allocate for the contents of a value. +</p></dd> +</dl> + + + + +</body> +</html> |