You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
143 lines
6.2 KiB
HTML
143 lines
6.2 KiB
HTML
4 years ago
|
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
|
||
|
|
<html>
|
||
|
|
<!-- Copyright (C) 1988-2019 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 6.4, http://www.gnu.org/software/texinfo/ -->
|
||
|
|
<head>
|
||
|
|
<title>Trace Files (Debugging with GDB)</title>
|
||
|
|
|
||
|
|
<meta name="description" content="Trace Files (Debugging with GDB)">
|
||
|
|
<meta name="keywords" content="Trace Files (Debugging with GDB)">
|
||
|
|
<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="Tracepoints.html#Tracepoints" rel="up" title="Tracepoints">
|
||
|
|
<link href="Overlays.html#Overlays" rel="next" title="Overlays">
|
||
|
|
<link href="Tracepoint-Variables.html#Tracepoint-Variables" rel="prev" title="Tracepoint Variables">
|
||
|
|
<style type="text/css">
|
||
|
|
<!--
|
||
|
|
a.summary-letter {text-decoration: none}
|
||
|
|
blockquote.indentedblock {margin-right: 0em}
|
||
|
|
blockquote.smallindentedblock {margin-right: 0em; font-size: smaller}
|
||
|
|
blockquote.smallquotation {font-size: smaller}
|
||
|
|
div.display {margin-left: 3.2em}
|
||
|
|
div.example {margin-left: 3.2em}
|
||
|
|
div.lisp {margin-left: 3.2em}
|
||
|
|
div.smalldisplay {margin-left: 3.2em}
|
||
|
|
div.smallexample {margin-left: 3.2em}
|
||
|
|
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.nolinebreak {white-space: nowrap}
|
||
|
|
span.roman {font-family: initial; font-weight: normal}
|
||
|
|
span.sansserif {font-family: sans-serif; font-weight: normal}
|
||
|
|
ul.no-bullet {list-style: none}
|
||
|
|
-->
|
||
|
|
</style>
|
||
|
|
|
||
|
|
|
||
|
|
</head>
|
||
|
|
|
||
|
|
<body lang="en">
|
||
|
|
<a name="Trace-Files"></a>
|
||
|
|
<div class="header">
|
||
|
|
<p>
|
||
|
|
Previous: <a href="Tracepoint-Variables.html#Tracepoint-Variables" accesskey="p" rel="prev">Tracepoint Variables</a>, Up: <a href="Tracepoints.html#Tracepoints" accesskey="u" rel="up">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>
|
||
|
|
</div>
|
||
|
|
<hr>
|
||
|
|
<a name="Using-Trace-Files"></a>
|
||
|
|
<h3 class="section">13.4 Using Trace Files</h3>
|
||
|
|
<a name="index-trace-files"></a>
|
||
|
|
|
||
|
|
<p>In some situations, the target running a trace experiment may no
|
||
|
|
longer be available; perhaps it crashed, or the hardware was needed
|
||
|
|
for a different activity. To handle these cases, you can arrange to
|
||
|
|
dump the trace data into a file, and later use that file as a source
|
||
|
|
of trace data, via the <code>target tfile</code> command.
|
||
|
|
</p>
|
||
|
|
<dl compact="compact">
|
||
|
|
<dd>
|
||
|
|
<a name="index-tsave"></a>
|
||
|
|
</dd>
|
||
|
|
<dt><code>tsave [ -r ] <var>filename</var></code></dt>
|
||
|
|
<dt><code>tsave [-ctf] <var>dirname</var></code></dt>
|
||
|
|
<dd><p>Save the trace data to <var>filename</var>. By default, this command
|
||
|
|
assumes that <var>filename</var> refers to the host filesystem, so if
|
||
|
|
necessary <small>GDB</small> will copy raw trace data up from the target and
|
||
|
|
then save it. If the target supports it, you can also supply the
|
||
|
|
optional argument <code>-r</code> (“remote”) to direct the target to save
|
||
|
|
the data directly into <var>filename</var> in its own filesystem, which may be
|
||
|
|
more efficient if the trace buffer is very large. (Note, however, that
|
||
|
|
<code>target tfile</code> can only read from files accessible to the host.)
|
||
|
|
By default, this command will save trace frame in tfile format.
|
||
|
|
You can supply the optional argument <code>-ctf</code> to save data in CTF
|
||
|
|
format. The <em>Common Trace Format</em> (CTF) is proposed as a trace format
|
||
|
|
that can be shared by multiple debugging and tracing tools. Please go to
|
||
|
|
‘<code>http://www.efficios.com/ctf</code>’ to get more information.
|
||
|
|
</p>
|
||
|
|
<a name="index-target-tfile"></a>
|
||
|
|
<a name="index-tfile"></a>
|
||
|
|
<a name="index-target-ctf"></a>
|
||
|
|
<a name="index-ctf"></a>
|
||
|
|
</dd>
|
||
|
|
<dt><code>target tfile <var>filename</var></code></dt>
|
||
|
|
<dt><code>target ctf <var>dirname</var></code></dt>
|
||
|
|
<dd><p>Use the file named <var>filename</var> or directory named <var>dirname</var> as
|
||
|
|
a source of trace data. Commands that examine data work as they do with
|
||
|
|
a live target, but it is not possible to run any new trace experiments.
|
||
|
|
<code>tstatus</code> will report the state of the trace run at the moment
|
||
|
|
the data was saved, as well as the current trace frame you are examining.
|
||
|
|
Both <var>filename</var> and <var>dirname</var> must be on a filesystem accessible to
|
||
|
|
the host.
|
||
|
|
</p>
|
||
|
|
<div class="smallexample">
|
||
|
|
<pre class="smallexample">(gdb) target ctf ctf.ctf
|
||
|
|
(gdb) tfind
|
||
|
|
Found trace frame 0, tracepoint 2
|
||
|
|
39 ++a; /* set tracepoint 1 here */
|
||
|
|
(gdb) tdump
|
||
|
|
Data collected at tracepoint 2, trace frame 0:
|
||
|
|
i = 0
|
||
|
|
a = 0
|
||
|
|
b = 1 '\001'
|
||
|
|
c = {"123", "456", "789", "123", "456", "789"}
|
||
|
|
d = {{{a = 1, b = 2}, {a = 3, b = 4}}, {{a = 5, b = 6}, {a = 7, b = 8}}}
|
||
|
|
(gdb) p b
|
||
|
|
$1 = 1
|
||
|
|
</pre></div>
|
||
|
|
|
||
|
|
</dd>
|
||
|
|
</dl>
|
||
|
|
|
||
|
|
<hr>
|
||
|
|
<div class="header">
|
||
|
|
<p>
|
||
|
|
Previous: <a href="Tracepoint-Variables.html#Tracepoint-Variables" accesskey="p" rel="prev">Tracepoint Variables</a>, Up: <a href="Tracepoints.html#Tracepoints" accesskey="u" rel="up">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>
|
||
|
|
</div>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</body>
|
||
|
|
</html>
|