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| author | alk3pInjection <webmaster@raspii.tech> | 2024-02-04 16:16:35 +0800 |
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| committer | alk3pInjection <webmaster@raspii.tech> | 2024-02-04 16:16:35 +0800 |
| commit | 6ce4ebed87858ecdd79a1091367c6e961055daa9 (patch) | |
| tree | 1c2a6a60531acf791531bbd9c8ac14c23ef8a66c /share/doc/gdb/Thread-groups.html | |
https://developer.arm.com/downloads/-/arm-gnu-toolchain-downloads
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diff --git a/share/doc/gdb/Thread-groups.html b/share/doc/gdb/Thread-groups.html new file mode 100644 index 0000000..375584d --- /dev/null +++ b/share/doc/gdb/Thread-groups.html @@ -0,0 +1,120 @@ +<!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: Thread groups</title> + +<meta name="description" content="Debugging with GDB: Thread groups"> +<meta name="keywords" content="Debugging with GDB: Thread groups"> +<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-General-Design.html#GDB_002fMI-General-Design" rel="up" title="GDB/MI General Design"> +<link href="GDB_002fMI-Command-Syntax.html#GDB_002fMI-Command-Syntax" rel="next" title="GDB/MI Command Syntax"> +<link href="Asynchronous-and-non_002dstop-modes.html#Asynchronous-and-non_002dstop-modes" rel="previous" title="Asynchronous and non-stop modes"> +<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="Thread-groups"></a> +<div class="header"> +<p> +Previous: <a href="Asynchronous-and-non_002dstop-modes.html#Asynchronous-and-non_002dstop-modes" accesskey="p" rel="previous">Asynchronous and non-stop modes</a>, Up: <a href="GDB_002fMI-General-Design.html#GDB_002fMI-General-Design" accesskey="u" rel="up">GDB/MI General Design</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="Thread-groups-1"></a> +<h4 class="subsection">27.1.3 Thread groups</h4> +<p><small>GDB</small> may be used to debug several processes at the same time. +On some platforms, <small>GDB</small> may support debugging of several +hardware systems, each one having several cores with several different +processes running on each core. This section describes the MI +mechanism to support such debugging scenarios. +</p> +<p>The key observation is that regardless of the structure of the +target, MI can have a global list of threads, because most commands that +accept the ‘<samp>--thread</samp>’ option do not need to know what process that +thread belongs to. Therefore, it is not necessary to introduce +neither additional ‘<samp>--process</samp>’ option, nor an notion of the +current process in the MI interface. The only strictly new feature +that is required is the ability to find how the threads are grouped +into processes. +</p> +<p>To allow the user to discover such grouping, and to support arbitrary +hierarchy of machines/cores/processes, MI introduces the concept of a +<em>thread group</em>. Thread group is a collection of threads and other +thread groups. A thread group always has a string identifier, a type, +and may have additional attributes specific to the type. A new +command, <code>-list-thread-groups</code>, returns the list of top-level +thread groups, which correspond to processes that <small>GDB</small> is +debugging at the moment. By passing an identifier of a thread group +to the <code>-list-thread-groups</code> command, it is possible to obtain +the members of specific thread group. +</p> +<p>To allow the user to easily discover processes, and other objects, he +wishes to debug, a concept of <em>available thread group</em> is +introduced. Available thread group is an thread group that +<small>GDB</small> is not debugging, but that can be attached to, using the +<code>-target-attach</code> command. The list of available top-level thread +groups can be obtained using ‘<samp>-list-thread-groups --available</samp>’. +In general, the content of a thread group may be only retrieved only +after attaching to that thread group. +</p> +<p>Thread groups are related to inferiors (see <a href="Inferiors-Connections-and-Programs.html#Inferiors-Connections-and-Programs">Inferiors Connections and Programs</a>). Each inferior corresponds to a thread group of a special +type ‘<samp>process</samp>’, and some additional operations are permitted on +such thread groups. +</p> +<hr> +<div class="header"> +<p> +Previous: <a href="Asynchronous-and-non_002dstop-modes.html#Asynchronous-and-non_002dstop-modes" accesskey="p" rel="previous">Asynchronous and non-stop modes</a>, Up: <a href="GDB_002fMI-General-Design.html#GDB_002fMI-General-Design" accesskey="u" rel="up">GDB/MI General Design</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> |