141 lines
6.7 KiB
HTML
141 lines
6.7 KiB
HTML
|
<html lang="en">
|
||
|
|
<head>
|
||
|
|
<title>Threads In Python - Debugging with GDB</title>
|
||
|
|
<meta http-equiv="Content-Type" content="text/html">
|
||
|
|
<meta name="description" content="Debugging with GDB">
|
||
|
|
<meta name="generator" content="makeinfo 4.13">
|
||
|
|
<link title="Top" rel="start" href="index.html#Top">
|
||
|
|
<link rel="up" href="Python-API.html#Python-API" title="Python API">
|
||
|
|
<link rel="prev" href="Events-In-Python.html#Events-In-Python" title="Events In Python">
|
||
|
|
<link rel="next" href="Recordings-In-Python.html#Recordings-In-Python" title="Recordings In Python">
|
||
|
|
<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
|
||
|
|
<!--
|
||
|
|
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.''
|
||
|
|
-->
|
||
|
|
<meta http-equiv="Content-Style-Type" content="text/css">
|
||
|
|
<style type="text/css"><!--
|
||
|
|
pre.display { font-family:inherit }
|
||
|
|
pre.format { font-family:inherit }
|
||
|
|
pre.smalldisplay { font-family:inherit; font-size:smaller }
|
||
|
|
pre.smallformat { font-family:inherit; font-size:smaller }
|
||
|
|
pre.smallexample { font-size:smaller }
|
||
|
|
pre.smalllisp { font-size:smaller }
|
||
|
|
span.sc { font-variant:small-caps }
|
||
|
|
span.roman { font-family:serif; font-weight:normal; }
|
||
|
|
span.sansserif { font-family:sans-serif; font-weight:normal; }
|
||
|
|
--></style>
|
||
|
|
</head>
|
||
|
|
<body>
|
||
|
|
<div class="node">
|
||
|
|
<a name="Threads-In-Python"></a>
|
||
|
|
<p>
|
||
|
|
Next: <a rel="next" accesskey="n" href="Recordings-In-Python.html#Recordings-In-Python">Recordings In Python</a>,
|
||
|
|
Previous: <a rel="previous" accesskey="p" href="Events-In-Python.html#Events-In-Python">Events In Python</a>,
|
||
|
|
Up: <a rel="up" accesskey="u" href="Python-API.html#Python-API">Python API</a>
|
||
|
|
<hr>
|
||
|
|
</div>
|
||
|
|
|
||
|
|
<h5 class="subsubsection">23.2.2.18 Threads In Python</h5>
|
||
|
|
|
||
|
|
<p><a name="index-threads-in-python-2095"></a>
|
||
|
|
<a name="index-gdb_002eInferiorThread-2096"></a>Python scripts can access information about, and manipulate inferior threads
|
||
|
|
controlled by <span class="sc">gdb</span>, via objects of the <code>gdb.InferiorThread</code> class.
|
||
|
|
|
||
|
|
<p>The following thread-related functions are available in the <code>gdb</code>
|
||
|
|
module:
|
||
|
|
|
||
|
|
<p><a name="index-gdb_002eselected_005fthread-2097"></a>
|
||
|
|
|
||
|
|
<div class="defun">
|
||
|
|
— Function: <b>gdb.selected_thread</b> ()<var><a name="index-gdb_002eselected_005fthread-2098"></a></var><br>
|
||
|
|
<blockquote><p>This function returns the thread object for the selected thread. If there
|
||
|
|
is no selected thread, this will return <code>None</code>.
|
||
|
|
</p></blockquote></div>
|
||
|
|
|
||
|
|
<p>A <code>gdb.InferiorThread</code> object has the following attributes:
|
||
|
|
|
||
|
|
<div class="defun">
|
||
|
|
— Variable: <b>InferiorThread.name</b><var><a name="index-InferiorThread_002ename-2099"></a></var><br>
|
||
|
|
<blockquote><p>The name of the thread. If the user specified a name using
|
||
|
|
<code>thread name</code>, then this returns that name. Otherwise, if an
|
||
|
|
OS-supplied name is available, then it is returned. Otherwise, this
|
||
|
|
returns <code>None</code>.
|
||
|
|
|
||
|
|
<p>This attribute can be assigned to. The new value must be a string
|
||
|
|
object, which sets the new name, or <code>None</code>, which removes any
|
||
|
|
user-specified thread name.
|
||
|
|
</p></blockquote></div>
|
||
|
|
|
||
|
|
<div class="defun">
|
||
|
|
— Variable: <b>InferiorThread.num</b><var><a name="index-InferiorThread_002enum-2100"></a></var><br>
|
||
|
|
<blockquote><p>The per-inferior number of the thread, as assigned by GDB.
|
||
|
|
</p></blockquote></div>
|
||
|
|
|
||
|
|
<div class="defun">
|
||
|
|
— Variable: <b>InferiorThread.global_num</b><var><a name="index-InferiorThread_002eglobal_005fnum-2101"></a></var><br>
|
||
|
|
<blockquote><p>The global ID of the thread, as assigned by GDB. You can use this to
|
||
|
|
make Python breakpoints thread-specific, for example
|
||
|
|
(see <a href="python_005fbreakpoint_005fthread.html#python_005fbreakpoint_005fthread">The Breakpoint.thread attribute</a>).
|
||
|
|
</p></blockquote></div>
|
||
|
|
|
||
|
|
<div class="defun">
|
||
|
|
— Variable: <b>InferiorThread.ptid</b><var><a name="index-InferiorThread_002eptid-2102"></a></var><br>
|
||
|
|
<blockquote><p>ID of the thread, as assigned by the operating system. This attribute is a
|
||
|
|
tuple containing three integers. The first is the Process ID (PID); the second
|
||
|
|
is the Lightweight Process ID (LWPID), and the third is the Thread ID (TID).
|
||
|
|
Either the LWPID or TID may be 0, which indicates that the operating system
|
||
|
|
does not use that identifier.
|
||
|
|
</p></blockquote></div>
|
||
|
|
|
||
|
|
<div class="defun">
|
||
|
|
— Variable: <b>InferiorThread.inferior</b><var><a name="index-InferiorThread_002einferior-2103"></a></var><br>
|
||
|
|
<blockquote><p>The inferior this thread belongs to. This attribute is represented as
|
||
|
|
a <code>gdb.Inferior</code> object. This attribute is not writable.
|
||
|
|
</p></blockquote></div>
|
||
|
|
|
||
|
|
<p>A <code>gdb.InferiorThread</code> object has the following methods:
|
||
|
|
|
||
|
|
<div class="defun">
|
||
|
|
— Function: <b>InferiorThread.is_valid</b> ()<var><a name="index-InferiorThread_002eis_005fvalid-2104"></a></var><br>
|
||
|
|
<blockquote><p>Returns <code>True</code> if the <code>gdb.InferiorThread</code> object is valid,
|
||
|
|
<code>False</code> if not. A <code>gdb.InferiorThread</code> object will become
|
||
|
|
invalid if the thread exits, or the inferior that the thread belongs
|
||
|
|
is deleted. All other <code>gdb.InferiorThread</code> methods will throw an
|
||
|
|
exception if it is invalid at the time the method is called.
|
||
|
|
</p></blockquote></div>
|
||
|
|
|
||
|
|
<div class="defun">
|
||
|
|
— Function: <b>InferiorThread.switch</b> ()<var><a name="index-InferiorThread_002eswitch-2105"></a></var><br>
|
||
|
|
<blockquote><p>This changes <span class="sc">gdb</span>'s currently selected thread to the one represented
|
||
|
|
by this object.
|
||
|
|
</p></blockquote></div>
|
||
|
|
|
||
|
|
<div class="defun">
|
||
|
|
— Function: <b>InferiorThread.is_stopped</b> ()<var><a name="index-InferiorThread_002eis_005fstopped-2106"></a></var><br>
|
||
|
|
<blockquote><p>Return a Boolean indicating whether the thread is stopped.
|
||
|
|
</p></blockquote></div>
|
||
|
|
|
||
|
|
<div class="defun">
|
||
|
|
— Function: <b>InferiorThread.is_running</b> ()<var><a name="index-InferiorThread_002eis_005frunning-2107"></a></var><br>
|
||
|
|
<blockquote><p>Return a Boolean indicating whether the thread is running.
|
||
|
|
</p></blockquote></div>
|
||
|
|
|
||
|
|
<div class="defun">
|
||
|
|
— Function: <b>InferiorThread.is_exited</b> ()<var><a name="index-InferiorThread_002eis_005fexited-2108"></a></var><br>
|
||
|
|
<blockquote><p>Return a Boolean indicating whether the thread is exited.
|
||
|
|
</p></blockquote></div>
|
||
|
|
|
||
|
|
</body></html>
|
||
|
|
|