1<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 2<html> 3<!-- Copyright (C) 1988-2021 Free Software Foundation, Inc. 4 5Permission is granted to copy, distribute and/or modify this document 6under the terms of the GNU Free Documentation License, Version 1.3 or 7any later version published by the Free Software Foundation; with the 8Invariant Sections being "Free Software" and "Free Software Needs 9Free Documentation", with the Front-Cover Texts being "A GNU Manual," 10and with the Back-Cover Texts as in (a) below. 11 12(a) The FSF's Back-Cover Text is: "You are free to copy and modify 13this GNU Manual. Buying copies from GNU Press supports the FSF in 14developing GNU and promoting software freedom." --> 15<!-- Created by GNU Texinfo 5.1, http://www.gnu.org/software/texinfo/ --> 16<head> 17<title>Debugging with GDB: Ada Settings</title> 18 19<meta name="description" content="Debugging with GDB: Ada Settings"> 20<meta name="keywords" content="Debugging with GDB: Ada Settings"> 21<meta name="resource-type" content="document"> 22<meta name="distribution" content="global"> 23<meta name="Generator" content="makeinfo"> 24<meta http-equiv="Content-Type" content="text/html; charset=utf-8"> 25<link href="index.html#Top" rel="start" title="Top"> 26<link href="Concept-Index.html#Concept-Index" rel="index" title="Concept Index"> 27<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents"> 28<link href="Ada.html#Ada" rel="up" title="Ada"> 29<link href="Ada-Glitches.html#Ada-Glitches" rel="next" title="Ada Glitches"> 30<link href="Ravenscar-Profile.html#Ravenscar-Profile" rel="previous" title="Ravenscar Profile"> 31<style type="text/css"> 32<!-- 33a.summary-letter {text-decoration: none} 34blockquote.smallquotation {font-size: smaller} 35div.display {margin-left: 3.2em} 36div.example {margin-left: 3.2em} 37div.indentedblock {margin-left: 3.2em} 38div.lisp {margin-left: 3.2em} 39div.smalldisplay {margin-left: 3.2em} 40div.smallexample {margin-left: 3.2em} 41div.smallindentedblock {margin-left: 3.2em; font-size: smaller} 42div.smalllisp {margin-left: 3.2em} 43kbd {font-style:oblique} 44pre.display {font-family: inherit} 45pre.format {font-family: inherit} 46pre.menu-comment {font-family: serif} 47pre.menu-preformatted {font-family: serif} 48pre.smalldisplay {font-family: inherit; font-size: smaller} 49pre.smallexample {font-size: smaller} 50pre.smallformat {font-family: inherit; font-size: smaller} 51pre.smalllisp {font-size: smaller} 52span.nocodebreak {white-space:nowrap} 53span.nolinebreak {white-space:nowrap} 54span.roman {font-family:serif; font-weight:normal} 55span.sansserif {font-family:sans-serif; font-weight:normal} 56ul.no-bullet {list-style: none} 57--> 58</style> 59 60 61</head> 62 63<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000"> 64<a name="Ada-Settings"></a> 65<div class="header"> 66<p> 67Next: <a href="Ada-Glitches.html#Ada-Glitches" accesskey="n" rel="next">Ada Glitches</a>, Previous: <a href="Ravenscar-Profile.html#Ravenscar-Profile" accesskey="p" rel="previous">Ravenscar Profile</a>, Up: <a href="Ada.html#Ada" accesskey="u" rel="up">Ada</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> 68</div> 69<hr> 70<a name="Ada-Settings-1"></a> 71<h4 class="subsubsection">15.4.10.10 Ada Settings</h4> 72<a name="index-Ada-settings"></a> 73 74<dl compact="compact"> 75<dd><a name="index-set-varsize_002dlimit"></a> 76</dd> 77<dt><code>set varsize-limit <var>size</var></code></dt> 78<dd><p>Prevent <small>GDB</small> from attempting to evaluate objects whose size 79is above the given limit (<var>size</var>) when those sizes are computed 80from run-time quantities. This is typically the case when the object 81has a variable size, such as an array whose bounds are not known at 82compile time for example. Setting <var>size</var> to <code>unlimited</code> 83removes the size limitation. By default, the limit is about 65KB. 84</p> 85<p>The purpose of having such a limit is to prevent <small>GDB</small> from 86trying to grab enormous chunks of virtual memory when asked to evaluate 87a quantity whose bounds have been corrupted or have not yet been fully 88initialized. The limit applies to the results of some subexpressions 89as well as to complete expressions. For example, an expression denoting 90a simple integer component, such as <code>x.y.z</code>, may fail if the size of 91<code>x.y</code> is variable and exceeds <code>size</code>. On the other hand, 92<small>GDB</small> is sometimes clever; the expression <code>A(i)</code>, where 93<code>A</code> is an array variable with non-constant size, will generally 94succeed regardless of the bounds on <code>A</code>, as long as the component 95size is less than <var>size</var>. 96</p> 97<a name="index-show-varsize_002dlimit"></a> 98</dd> 99<dt><code>show varsize-limit</code></dt> 100<dd><p>Show the limit on types whose size is determined by run-time quantities. 101</p></dd> 102</dl> 103 104 105 106 107</body> 108</html> 109