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: Tracepoint Passcounts</title> 18 19<meta name="description" content="Debugging with GDB: Tracepoint Passcounts"> 20<meta name="keywords" content="Debugging with GDB: Tracepoint Passcounts"> 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="Set-Tracepoints.html#Set-Tracepoints" rel="up" title="Set Tracepoints"> 29<link href="Tracepoint-Conditions.html#Tracepoint-Conditions" rel="next" title="Tracepoint Conditions"> 30<link href="Enable-and-Disable-Tracepoints.html#Enable-and-Disable-Tracepoints" rel="previous" title="Enable and Disable Tracepoints"> 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="Tracepoint-Passcounts"></a> 65<div class="header"> 66<p> 67Next: <a href="Tracepoint-Conditions.html#Tracepoint-Conditions" accesskey="n" rel="next">Tracepoint Conditions</a>, Previous: <a href="Enable-and-Disable-Tracepoints.html#Enable-and-Disable-Tracepoints" accesskey="p" rel="previous">Enable and Disable Tracepoints</a>, Up: <a href="Set-Tracepoints.html#Set-Tracepoints" accesskey="u" rel="up">Set Tracepoints</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="Tracepoint-Passcounts-1"></a> 71<h4 class="subsection">13.1.3 Tracepoint Passcounts</h4> 72 73<dl compact="compact"> 74<dd><a name="index-passcount"></a> 75<a name="index-tracepoint-pass-count"></a> 76</dd> 77<dt><code>passcount <span class="roman">[</span><var>n</var> <span class="roman">[</span><var>num</var><span class="roman">]]</span></code></dt> 78<dd><p>Set the <em>passcount</em> of a tracepoint. The passcount is a way to 79automatically stop a trace experiment. If a tracepoint’s passcount is 80<var>n</var>, then the trace experiment will be automatically stopped on 81the <var>n</var>’th time that tracepoint is hit. If the tracepoint number 82<var>num</var> is not specified, the <code>passcount</code> command sets the 83passcount of the most recently defined tracepoint. If no passcount is 84given, the trace experiment will run until stopped explicitly by the 85user. 86</p> 87<p>Examples: 88</p> 89<div class="smallexample"> 90<pre class="smallexample">(gdb) <b>passcount 5 2</b> // Stop on the 5th execution of 91</pre><pre class="smallexample"> <code>// tracepoint 2</code> 92</pre><pre class="smallexample"> 93(gdb) <b>passcount 12</b> // Stop on the 12th execution of the 94</pre><pre class="smallexample"> <code>// most recently defined tracepoint.</code> 95</pre><pre class="smallexample">(gdb) <b>trace foo</b> 96(gdb) <b>pass 3</b> 97(gdb) <b>trace bar</b> 98(gdb) <b>pass 2</b> 99(gdb) <b>trace baz</b> 100(gdb) <b>pass 1</b> // Stop tracing when foo has been 101</pre><pre class="smallexample"> <code>// executed 3 times OR when bar has</code> 102</pre><pre class="smallexample"> <code>// been executed 2 times</code> 103</pre><pre class="smallexample"> <code>// OR when baz has been executed 1 time.</code> 104</pre></div> 105</dd> 106</dl> 107 108 109 110 111</body> 112</html> 113