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108 lines
5.4 KiB
HTML
108 lines
5.4 KiB
HTML
4 years ago
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<!-- Copyright (C) 1988-2019 Free Software Foundation, Inc.
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Permission is granted to copy, distribute and/or modify this document
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under the terms of the GNU Free Documentation License, Version 1.3 or
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any later version published by the Free Software Foundation; with the
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Invariant Sections being "Free Software" and "Free Software Needs
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Free Documentation", with the Front-Cover Texts being "A GNU Manual,"
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and with the Back-Cover Texts as in (a) below.
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(a) The FSF's Back-Cover Text is: "You are free to copy and modify
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this GNU Manual. Buying copies from GNU Press supports the FSF in
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developing GNU and promoting software freedom." -->
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<!-- Created by GNU Texinfo 6.4, http://www.gnu.org/software/texinfo/ -->
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<head>
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<title>Thread Stops (Debugging with GDB)</title>
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<meta name="description" content="Thread Stops (Debugging with GDB)">
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<meta name="keywords" content="Thread Stops (Debugging with GDB)">
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<meta name="resource-type" content="document">
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<meta name="distribution" content="global">
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<meta name="Generator" content="makeinfo">
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<link href="index.html#Top" rel="start" title="Top">
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<link href="Concept-Index.html#Concept-Index" rel="index" title="Concept Index">
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="Stopping.html#Stopping" rel="up" title="Stopping">
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<link href="All_002dStop-Mode.html#All_002dStop-Mode" rel="next" title="All-Stop Mode">
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<link href="Signals.html#Signals" rel="prev" title="Signals">
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<style type="text/css">
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-->
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</style>
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</head>
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<body lang="en">
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<a name="Thread-Stops"></a>
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<div class="header">
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<p>
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Previous: <a href="Signals.html#Signals" accesskey="p" rel="prev">Signals</a>, Up: <a href="Stopping.html#Stopping" accesskey="u" rel="up">Stopping</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>
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</div>
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<hr>
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<a name="Stopping-and-Starting-Multi_002dthread-Programs"></a>
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<h3 class="section">5.5 Stopping and Starting Multi-thread Programs</h3>
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<a name="index-stopped-threads"></a>
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<a name="index-threads_002c-stopped"></a>
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<a name="index-continuing-threads"></a>
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<a name="index-threads_002c-continuing"></a>
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<p><small>GDB</small> supports debugging programs with multiple threads
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(see <a href="Threads.html#Threads">Debugging Programs with Multiple Threads</a>). There
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are two modes of controlling execution of your program within the
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debugger. In the default mode, referred to as <em>all-stop mode</em>,
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when any thread in your program stops (for example, at a breakpoint
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or while being stepped), all other threads in the program are also stopped by
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<small>GDB</small>. On some targets, <small>GDB</small> also supports
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<em>non-stop mode</em>, in which other threads can continue to run freely while
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you examine the stopped thread in the debugger.
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</p>
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<table class="menu" border="0" cellspacing="0">
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<tr><td align="left" valign="top">• <a href="All_002dStop-Mode.html#All_002dStop-Mode" accesskey="1">All-Stop Mode</a>:</td><td> </td><td align="left" valign="top">All threads stop when GDB takes control
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</td></tr>
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<tr><td align="left" valign="top">• <a href="Non_002dStop-Mode.html#Non_002dStop-Mode" accesskey="2">Non-Stop Mode</a>:</td><td> </td><td align="left" valign="top">Other threads continue to execute
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</td></tr>
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<tr><td align="left" valign="top">• <a href="Background-Execution.html#Background-Execution" accesskey="3">Background Execution</a>:</td><td> </td><td align="left" valign="top">Running your program asynchronously
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</td></tr>
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<tr><td align="left" valign="top">• <a href="Thread_002dSpecific-Breakpoints.html#Thread_002dSpecific-Breakpoints" accesskey="4">Thread-Specific Breakpoints</a>:</td><td> </td><td align="left" valign="top">Controlling breakpoints
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</td></tr>
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<tr><td align="left" valign="top">• <a href="Interrupted-System-Calls.html#Interrupted-System-Calls" accesskey="5">Interrupted System Calls</a>:</td><td> </td><td align="left" valign="top">GDB may interfere with system calls
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</td></tr>
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<tr><td align="left" valign="top">• <a href="Observer-Mode.html#Observer-Mode" accesskey="6">Observer Mode</a>:</td><td> </td><td align="left" valign="top">GDB does not alter program behavior
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</td></tr>
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</table>
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</body>
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</html>
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