<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
|
<html>
|
<!-- Copyright (C) 1988-2021 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: tdump</title>
|
|
<meta name="description" content="Debugging with GDB: tdump">
|
<meta name="keywords" content="Debugging with GDB: tdump">
|
<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="save-tracepoints.html#save-tracepoints" rel="next" title="save tracepoints">
|
<link href="tfind.html#tfind" rel="previous" title="tfind">
|
<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="tdump"></a>
|
<div class="header">
|
<p>
|
Next: <a href="save-tracepoints.html#save-tracepoints" accesskey="n" rel="next">save tracepoints</a>, Previous: <a href="tfind.html#tfind" accesskey="p" rel="previous">tfind</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="tdump-1"></a>
|
<h4 class="subsection">13.2.2 <code>tdump</code></h4>
|
<a name="index-tdump"></a>
|
<a name="index-dump-all-data-collected-at-tracepoint"></a>
|
<a name="index-tracepoint-data_002c-display"></a>
|
|
<p>This command takes no arguments. It prints all the data collected at
|
the current trace snapshot.
|
</p>
|
<div class="smallexample">
|
<pre class="smallexample">(gdb) <b>trace 444</b>
|
(gdb) <b>actions</b>
|
Enter actions for tracepoint #2, one per line:
|
> collect $regs, $locals, $args, gdb_long_test
|
> end
|
|
(gdb) <b>tstart</b>
|
|
(gdb) <b>tfind line 444</b>
|
#0 gdb_test (p1=0x11, p2=0x22, p3=0x33, p4=0x44, p5=0x55, p6=0x66)
|
at gdb_test.c:444
|
444 printp( "%s: arguments = 0x%X 0x%X 0x%X 0x%X 0x%X 0x%X\n", )
|
|
(gdb) <b>tdump</b>
|
Data collected at tracepoint 2, trace frame 1:
|
d0 0xc4aa0085 -995491707
|
d1 0x18 24
|
d2 0x80 128
|
d3 0x33 51
|
d4 0x71aea3d 119204413
|
d5 0x22 34
|
d6 0xe0 224
|
d7 0x380035 3670069
|
a0 0x19e24a 1696330
|
a1 0x3000668 50333288
|
a2 0x100 256
|
a3 0x322000 3284992
|
a4 0x3000698 50333336
|
a5 0x1ad3cc 1758156
|
fp 0x30bf3c 0x30bf3c
|
sp 0x30bf34 0x30bf34
|
ps 0x0 0
|
pc 0x20b2c8 0x20b2c8
|
fpcontrol 0x0 0
|
fpstatus 0x0 0
|
fpiaddr 0x0 0
|
p = 0x20e5b4 "gdb-test"
|
p1 = (void *) 0x11
|
p2 = (void *) 0x22
|
p3 = (void *) 0x33
|
p4 = (void *) 0x44
|
p5 = (void *) 0x55
|
p6 = (void *) 0x66
|
gdb_long_test = 17 '\021'
|
|
(gdb)
|
</pre></div>
|
|
<p><code>tdump</code> works by scanning the tracepoint’s current collection
|
actions and printing the value of each expression listed. So
|
<code>tdump</code> can fail, if after a run, you change the tracepoint’s
|
actions to mention variables that were not collected during the run.
|
</p>
|
<p>Also, for tracepoints with <code>while-stepping</code> loops, <code>tdump</code>
|
uses the collected value of <code>$pc</code> to distinguish between trace
|
frames that were collected at the tracepoint hit, and frames that were
|
collected while stepping. This allows it to correctly choose whether
|
to display the basic list of collections, or the collections from the
|
body of the while-stepping loop. However, if <code>$pc</code> was not collected,
|
then <code>tdump</code> will always attempt to dump using the basic collection
|
list, and may fail if a while-stepping frame does not include all the
|
same data that is collected at the tracepoint hit.
|
</p>
|
<hr>
|
<div class="header">
|
<p>
|
Next: <a href="save-tracepoints.html#save-tracepoints" accesskey="n" rel="next">save tracepoints</a>, Previous: <a href="tfind.html#tfind" accesskey="p" rel="previous">tfind</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>
|
