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diff --git a/share/doc/gdb/tfind.html b/share/doc/gdb/tfind.html new file mode 100644 index 0000000..f081966 --- /dev/null +++ b/share/doc/gdb/tfind.html @@ -0,0 +1,208 @@ +<!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: tfind</title> + +<meta name="description" content="Debugging with GDB: tfind"> +<meta name="keywords" content="Debugging with GDB: tfind"> +<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="Analyze-Collected-Data.html#Analyze-Collected-Data" rel="up" title="Analyze Collected Data"> +<link href="tdump.html#tdump" rel="next" title="tdump"> +<link href="Analyze-Collected-Data.html#Analyze-Collected-Data" rel="previous" title="Analyze Collected Data"> +<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="tfind"></a> +<div class="header"> +<p> +Next: <a href="tdump.html#tdump" accesskey="n" rel="next">tdump</a>, Up: <a href="Analyze-Collected-Data.html#Analyze-Collected-Data" accesskey="u" rel="up">Analyze Collected 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="tfind-n"></a> +<h4 class="subsection">13.2.1 <code>tfind <var>n</var></code></h4> + +<a name="index-tfind"></a> +<a name="index-select-trace-snapshot"></a> +<a name="index-find-trace-snapshot"></a> +<p>The basic command for selecting a trace snapshot from the buffer is +<code>tfind <var>n</var></code>, which finds trace snapshot number <var>n</var>, +counting from zero. If no argument <var>n</var> is given, the next +snapshot is selected. +</p> +<p>Here are the various forms of using the <code>tfind</code> command. +</p> +<dl compact="compact"> +<dt><code>tfind start</code></dt> +<dd><p>Find the first snapshot in the buffer. This is a synonym for +<code>tfind 0</code> (since 0 is the number of the first snapshot). +</p> +</dd> +<dt><code>tfind none</code></dt> +<dd><p>Stop debugging trace snapshots, resume <em>live</em> debugging. +</p> +</dd> +<dt><code>tfind end</code></dt> +<dd><p>Same as ‘<samp>tfind none</samp>’. +</p> +</dd> +<dt><code>tfind</code></dt> +<dd><p>No argument means find the next trace snapshot or find the first +one if no trace snapshot is selected. +</p> +</dd> +<dt><code>tfind -</code></dt> +<dd><p>Find the previous trace snapshot before the current one. This permits +retracing earlier steps. +</p> +</dd> +<dt><code>tfind tracepoint <var>num</var></code></dt> +<dd><p>Find the next snapshot associated with tracepoint <var>num</var>. Search +proceeds forward from the last examined trace snapshot. If no +argument <var>num</var> is given, it means find the next snapshot collected +for the same tracepoint as the current snapshot. +</p> +</dd> +<dt><code>tfind pc <var>addr</var></code></dt> +<dd><p>Find the next snapshot associated with the value <var>addr</var> of the +program counter. Search proceeds forward from the last examined trace +snapshot. If no argument <var>addr</var> is given, it means find the next +snapshot with the same value of PC as the current snapshot. +</p> +</dd> +<dt><code>tfind outside <var>addr1</var>, <var>addr2</var></code></dt> +<dd><p>Find the next snapshot whose PC is outside the given range of +addresses (exclusive). +</p> +</dd> +<dt><code>tfind range <var>addr1</var>, <var>addr2</var></code></dt> +<dd><p>Find the next snapshot whose PC is between <var>addr1</var> and +<var>addr2</var> (inclusive). +</p> +</dd> +<dt><code>tfind line <span class="roman">[</span><var>file</var>:<span class="roman">]</span><var>n</var></code></dt> +<dd><p>Find the next snapshot associated with the source line <var>n</var>. If +the optional argument <var>file</var> is given, refer to line <var>n</var> in +that source file. Search proceeds forward from the last examined +trace snapshot. If no argument <var>n</var> is given, it means find the +next line other than the one currently being examined; thus saying +<code>tfind line</code> repeatedly can appear to have the same effect as +stepping from line to line in a <em>live</em> debugging session. +</p></dd> +</dl> + +<p>The default arguments for the <code>tfind</code> commands are specifically +designed to make it easy to scan through the trace buffer. For +instance, <code>tfind</code> with no argument selects the next trace +snapshot, and <code>tfind -</code> with no argument selects the previous +trace snapshot. So, by giving one <code>tfind</code> command, and then +simply hitting <tt class="key">RET</tt> repeatedly you can examine all the trace +snapshots in order. Or, by saying <code>tfind -</code> and then hitting +<tt class="key">RET</tt> repeatedly you can examine the snapshots in reverse order. +The <code>tfind line</code> command with no argument selects the snapshot +for the next source line executed. The <code>tfind pc</code> command with +no argument selects the next snapshot with the same program counter +(PC) as the current frame. The <code>tfind tracepoint</code> command with +no argument selects the next trace snapshot collected by the same +tracepoint as the current one. +</p> +<p>In addition to letting you scan through the trace buffer manually, +these commands make it easy to construct <small>GDB</small> scripts that +scan through the trace buffer and print out whatever collected data +you are interested in. Thus, if we want to examine the PC, FP, and SP +registers from each trace frame in the buffer, we can say this: +</p> +<div class="smallexample"> +<pre class="smallexample">(gdb) <b>tfind start</b> +(gdb) <b>while ($trace_frame != -1)</b> +> printf "Frame %d, PC = %08X, SP = %08X, FP = %08X\n", \ + $trace_frame, $pc, $sp, $fp +> tfind +> end + +Frame 0, PC = 0020DC64, SP = 0030BF3C, FP = 0030BF44 +Frame 1, PC = 0020DC6C, SP = 0030BF38, FP = 0030BF44 +Frame 2, PC = 0020DC70, SP = 0030BF34, FP = 0030BF44 +Frame 3, PC = 0020DC74, SP = 0030BF30, FP = 0030BF44 +Frame 4, PC = 0020DC78, SP = 0030BF2C, FP = 0030BF44 +Frame 5, PC = 0020DC7C, SP = 0030BF28, FP = 0030BF44 +Frame 6, PC = 0020DC80, SP = 0030BF24, FP = 0030BF44 +Frame 7, PC = 0020DC84, SP = 0030BF20, FP = 0030BF44 +Frame 8, PC = 0020DC88, SP = 0030BF1C, FP = 0030BF44 +Frame 9, PC = 0020DC8E, SP = 0030BF18, FP = 0030BF44 +Frame 10, PC = 00203F6C, SP = 0030BE3C, FP = 0030BF14 +</pre></div> + +<p>Or, if we want to examine the variable <code>X</code> at each source line in +the buffer: +</p> +<div class="smallexample"> +<pre class="smallexample">(gdb) <b>tfind start</b> +(gdb) <b>while ($trace_frame != -1)</b> +> printf "Frame %d, X == %d\n", $trace_frame, X +> tfind line +> end + +Frame 0, X = 1 +Frame 7, X = 2 +Frame 13, X = 255 +</pre></div> + +<hr> +<div class="header"> +<p> +Next: <a href="tdump.html#tdump" accesskey="n" rel="next">tdump</a>, Up: <a href="Analyze-Collected-Data.html#Analyze-Collected-Data" accesskey="u" rel="up">Analyze Collected 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> + + + +</body> +</html> |