1<html lang="en"> 2<head> 3<title>Tracepoint Passcounts - Debugging with GDB</title> 4<meta http-equiv="Content-Type" content="text/html"> 5<meta name="description" content="Debugging with GDB"> 6<meta name="generator" content="makeinfo 4.13"> 7<link title="Top" rel="start" href="index.html#Top"> 8<link rel="up" href="Set-Tracepoints.html#Set-Tracepoints" title="Set Tracepoints"> 9<link rel="prev" href="Enable-and-Disable-Tracepoints.html#Enable-and-Disable-Tracepoints" title="Enable and Disable Tracepoints"> 10<link rel="next" href="Tracepoint-Conditions.html#Tracepoint-Conditions" title="Tracepoint Conditions"> 11<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage"> 12<!-- 13Copyright (C) 1988-2013 Free Software Foundation, Inc. 14 15Permission is granted to copy, distribute and/or modify this document 16under the terms of the GNU Free Documentation License, Version 1.3 or 17any later version published by the Free Software Foundation; with the 18Invariant Sections being ``Free Software'' and ``Free Software Needs 19Free Documentation'', with the Front-Cover Texts being ``A GNU Manual,'' 20and with the Back-Cover Texts as in (a) below. 21 22(a) The FSF's Back-Cover Text is: ``You are free to copy and modify 23this GNU Manual. Buying copies from GNU Press supports the FSF in 24developing GNU and promoting software freedom.'' 25--> 26<meta http-equiv="Content-Style-Type" content="text/css"> 27<style type="text/css"><!-- 28 pre.display { font-family:inherit } 29 pre.format { font-family:inherit } 30 pre.smalldisplay { font-family:inherit; font-size:smaller } 31 pre.smallformat { font-family:inherit; font-size:smaller } 32 pre.smallexample { font-size:smaller } 33 pre.smalllisp { font-size:smaller } 34 span.sc { font-variant:small-caps } 35 span.roman { font-family:serif; font-weight:normal; } 36 span.sansserif { font-family:sans-serif; font-weight:normal; } 37--></style> 38<link rel="stylesheet" type="text/css" href="../cs.css"> 39</head> 40<body> 41<div class="node"> 42<a name="Tracepoint-Passcounts"></a> 43<p> 44Next: <a rel="next" accesskey="n" href="Tracepoint-Conditions.html#Tracepoint-Conditions">Tracepoint Conditions</a>, 45Previous: <a rel="previous" accesskey="p" href="Enable-and-Disable-Tracepoints.html#Enable-and-Disable-Tracepoints">Enable and Disable Tracepoints</a>, 46Up: <a rel="up" accesskey="u" href="Set-Tracepoints.html#Set-Tracepoints">Set Tracepoints</a> 47<hr> 48</div> 49 50<h4 class="subsection">13.1.3 Tracepoint Passcounts</h4> 51 52 53<a name="index-passcount-779"></a> 54<a name="index-tracepoint-pass-count-780"></a> 55<dl><dt><code>passcount </code><span class="roman">[</span><var>n</var> <span class="roman">[</span><var>num</var><span class="roman">]]</span><dd>Set the <dfn>passcount</dfn> of a tracepoint. The passcount is a way to 56automatically stop a trace experiment. If a tracepoint's passcount is 57<var>n</var>, then the trace experiment will be automatically stopped on 58the <var>n</var>'th time that tracepoint is hit. If the tracepoint number 59<var>num</var> is not specified, the <code>passcount</code> command sets the 60passcount of the most recently defined tracepoint. If no passcount is 61given, the trace experiment will run until stopped explicitly by the 62user. 63 64 <p>Examples: 65 66 <pre class="smallexample"> (gdb) <b>passcount 5 2</b> // Stop on the 5th execution of 67 <br> <code>// tracepoint 2</code><br> 68 69 (gdb) <b>passcount 12</b> // Stop on the 12th execution of the 70 <br> <code>// most recently defined tracepoint.</code><br> 71 (gdb) <b>trace foo</b> 72 (gdb) <b>pass 3</b> 73 (gdb) <b>trace bar</b> 74 (gdb) <b>pass 2</b> 75 (gdb) <b>trace baz</b> 76 (gdb) <b>pass 1</b> // Stop tracing when foo has been 77 <br> <code>// executed 3 times OR when bar has</code><br> 78 <br> <code>// been executed 2 times</code><br> 79 <br> <code>// OR when baz has been executed 1 time.</code><br> 80</pre> 81 </dl> 82 83 </body></html> 84 85