| <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> |
| <html> |
| <!-- Copyright (C) 1988-2015 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 5.2, http://www.gnu.org/software/texinfo/ --> |
| <head> |
| <title>Debugging with GDB: GDB/MI Thread Commands</title> |
| |
| <meta name="description" content="Debugging with GDB: GDB/MI Thread Commands"> |
| <meta name="keywords" content="Debugging with GDB: GDB/MI Thread Commands"> |
| <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="GDB_002fMI.html#GDB_002fMI" rel="up" title="GDB/MI"> |
| <link href="GDB_002fMI-Ada-Tasking-Commands.html#GDB_002fMI-Ada-Tasking-Commands" rel="next" title="GDB/MI Ada Tasking Commands"> |
| <link href="GDB_002fMI-Program-Context.html#GDB_002fMI-Program-Context" rel="prev" title="GDB/MI Program Context"> |
| <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="GDB_002fMI-Thread-Commands"></a> |
| <div class="header"> |
| <p> |
| Next: <a href="GDB_002fMI-Ada-Tasking-Commands.html#GDB_002fMI-Ada-Tasking-Commands" accesskey="n" rel="next">GDB/MI Ada Tasking Commands</a>, Previous: <a href="GDB_002fMI-Program-Context.html#GDB_002fMI-Program-Context" accesskey="p" rel="prev">GDB/MI Program Context</a>, Up: <a href="GDB_002fMI.html#GDB_002fMI" accesskey="u" rel="up">GDB/MI</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="GDB_002fMI-Thread-Commands-1"></a> |
| <h3 class="section">27.11 <small>GDB/MI</small> Thread Commands</h3> |
| |
| |
| <a name="The-_002dthread_002dinfo-Command"></a> |
| <h4 class="subheading">The <code>-thread-info</code> Command</h4> |
| <a name="index-_002dthread_002dinfo"></a> |
| |
| <a name="Synopsis-22"></a> |
| <h4 class="subsubheading">Synopsis</h4> |
| |
| <div class="smallexample"> |
| <pre class="smallexample"> -thread-info [ <var>thread-id</var> ] |
| </pre></div> |
| |
| <p>Reports information about either a specific thread, if |
| the <var>thread-id</var> parameter is present, or about all |
| threads. When printing information about all threads, |
| also reports the current thread. |
| </p> |
| <a name="GDB-Command-21"></a> |
| <h4 class="subsubheading"><small>GDB</small> Command</h4> |
| |
| <p>The ‘<samp>info thread</samp>’ command prints the same information |
| about all threads. |
| </p> |
| <a name="Result-3"></a> |
| <h4 class="subsubheading">Result</h4> |
| |
| <p>The result is a list of threads. The following attributes are |
| defined for a given thread: |
| </p> |
| <dl compact="compact"> |
| <dt>‘<samp>current</samp>’</dt> |
| <dd><p>This field exists only for the current thread. It has the value ‘<samp>*</samp>’. |
| </p> |
| </dd> |
| <dt>‘<samp>id</samp>’</dt> |
| <dd><p>The identifier that <small>GDB</small> uses to refer to the thread. |
| </p> |
| </dd> |
| <dt>‘<samp>target-id</samp>’</dt> |
| <dd><p>The identifier that the target uses to refer to the thread. |
| </p> |
| </dd> |
| <dt>‘<samp>details</samp>’</dt> |
| <dd><p>Extra information about the thread, in a target-specific format. This |
| field is optional. |
| </p> |
| </dd> |
| <dt>‘<samp>name</samp>’</dt> |
| <dd><p>The name of the thread. If the user specified a name using the |
| <code>thread name</code> command, then this name is given. Otherwise, if |
| <small>GDB</small> can extract the thread name from the target, then that |
| name is given. If <small>GDB</small> cannot find the thread name, then this |
| field is omitted. |
| </p> |
| </dd> |
| <dt>‘<samp>frame</samp>’</dt> |
| <dd><p>The stack frame currently executing in the thread. |
| </p> |
| </dd> |
| <dt>‘<samp>state</samp>’</dt> |
| <dd><p>The thread’s state. The ‘<samp>state</samp>’ field may have the following |
| values: |
| </p> |
| <dl compact="compact"> |
| <dt><code>stopped</code></dt> |
| <dd><p>The thread is stopped. Frame information is available for stopped |
| threads. |
| </p> |
| </dd> |
| <dt><code>running</code></dt> |
| <dd><p>The thread is running. There’s no frame information for running |
| threads. |
| </p> |
| </dd> |
| </dl> |
| |
| </dd> |
| <dt>‘<samp>core</samp>’</dt> |
| <dd><p>If <small>GDB</small> can find the CPU core on which this thread is running, |
| then this field is the core identifier. This field is optional. |
| </p> |
| </dd> |
| </dl> |
| |
| <a name="Example-21"></a> |
| <h4 class="subsubheading">Example</h4> |
| |
| <div class="smallexample"> |
| <pre class="smallexample">-thread-info |
| ^done,threads=[ |
| {id="2",target-id="Thread 0xb7e14b90 (LWP 21257)", |
| frame={level="0",addr="0xffffe410",func="__kernel_vsyscall", |
| args=[]},state="running"}, |
| {id="1",target-id="Thread 0xb7e156b0 (LWP 21254)", |
| frame={level="0",addr="0x0804891f",func="foo", |
| args=[{name="i",value="10"}], |
| file="/tmp/a.c",fullname="/tmp/a.c",line="158"}, |
| state="running"}], |
| current-thread-id="1" |
| (gdb) |
| </pre></div> |
| |
| <a name="The-_002dthread_002dlist_002dids-Command"></a> |
| <h4 class="subheading">The <code>-thread-list-ids</code> Command</h4> |
| <a name="index-_002dthread_002dlist_002dids"></a> |
| |
| <a name="Synopsis-23"></a> |
| <h4 class="subsubheading">Synopsis</h4> |
| |
| <div class="smallexample"> |
| <pre class="smallexample"> -thread-list-ids |
| </pre></div> |
| |
| <p>Produces a list of the currently known <small>GDB</small> thread ids. At the |
| end of the list it also prints the total number of such threads. |
| </p> |
| <p>This command is retained for historical reasons, the |
| <code>-thread-info</code> command should be used instead. |
| </p> |
| <a name="GDB-Command-22"></a> |
| <h4 class="subsubheading"><small>GDB</small> Command</h4> |
| |
| <p>Part of ‘<samp>info threads</samp>’ supplies the same information. |
| </p> |
| <a name="Example-22"></a> |
| <h4 class="subsubheading">Example</h4> |
| |
| <div class="smallexample"> |
| <pre class="smallexample">(gdb) |
| -thread-list-ids |
| ^done,thread-ids={thread-id="3",thread-id="2",thread-id="1"}, |
| current-thread-id="1",number-of-threads="3" |
| (gdb) |
| </pre></div> |
| |
| |
| <a name="The-_002dthread_002dselect-Command"></a> |
| <h4 class="subheading">The <code>-thread-select</code> Command</h4> |
| <a name="index-_002dthread_002dselect"></a> |
| |
| <a name="Synopsis-24"></a> |
| <h4 class="subsubheading">Synopsis</h4> |
| |
| <div class="smallexample"> |
| <pre class="smallexample"> -thread-select <var>threadnum</var> |
| </pre></div> |
| |
| <p>Make <var>threadnum</var> the current thread. It prints the number of the new |
| current thread, and the topmost frame for that thread. |
| </p> |
| <p>This command is deprecated in favor of explicitly using the |
| ‘<samp>--thread</samp>’ option to each command. |
| </p> |
| <a name="GDB-Command-23"></a> |
| <h4 class="subsubheading"><small>GDB</small> Command</h4> |
| |
| <p>The corresponding <small>GDB</small> command is ‘<samp>thread</samp>’. |
| </p> |
| <a name="Example-23"></a> |
| <h4 class="subsubheading">Example</h4> |
| |
| <div class="smallexample"> |
| <pre class="smallexample">(gdb) |
| -exec-next |
| ^running |
| (gdb) |
| *stopped,reason="end-stepping-range",thread-id="2",line="187", |
| file="../../../devo/gdb/testsuite/gdb.threads/linux-dp.c" |
| (gdb) |
| -thread-list-ids |
| ^done, |
| thread-ids={thread-id="3",thread-id="2",thread-id="1"}, |
| number-of-threads="3" |
| (gdb) |
| -thread-select 3 |
| ^done,new-thread-id="3", |
| frame={level="0",func="vprintf", |
| args=[{name="format",value="0x8048e9c \"%*s%c %d %c\\n\""}, |
| {name="arg",value="0x2"}],file="vprintf.c",line="31"} |
| (gdb) |
| </pre></div> |
| |
| <hr> |
| <div class="header"> |
| <p> |
| Next: <a href="GDB_002fMI-Ada-Tasking-Commands.html#GDB_002fMI-Ada-Tasking-Commands" accesskey="n" rel="next">GDB/MI Ada Tasking Commands</a>, Previous: <a href="GDB_002fMI-Program-Context.html#GDB_002fMI-Program-Context" accesskey="p" rel="prev">GDB/MI Program Context</a>, Up: <a href="GDB_002fMI.html#GDB_002fMI" accesskey="u" rel="up">GDB/MI</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> |
