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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/Finish-Breakpoints-in-Python.html | |
https://developer.arm.com/downloads/-/arm-gnu-toolchain-downloads
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diff --git a/share/doc/gdb/Finish-Breakpoints-in-Python.html b/share/doc/gdb/Finish-Breakpoints-in-Python.html new file mode 100644 index 0000000..6299a7a --- /dev/null +++ b/share/doc/gdb/Finish-Breakpoints-in-Python.html @@ -0,0 +1,133 @@ +<!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: Finish Breakpoints in Python</title> + +<meta name="description" content="Debugging with GDB: Finish Breakpoints in Python"> +<meta name="keywords" content="Debugging with GDB: Finish Breakpoints in Python"> +<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="Python-API.html#Python-API" rel="up" title="Python API"> +<link href="Lazy-Strings-In-Python.html#Lazy-Strings-In-Python" rel="next" title="Lazy Strings In Python"> +<link href="Breakpoints-In-Python.html#Breakpoints-In-Python" rel="previous" title="Breakpoints In Python"> +<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="Finish-Breakpoints-in-Python"></a> +<div class="header"> +<p> +Next: <a href="Lazy-Strings-In-Python.html#Lazy-Strings-In-Python" accesskey="n" rel="next">Lazy Strings In Python</a>, Previous: <a href="Breakpoints-In-Python.html#Breakpoints-In-Python" accesskey="p" rel="previous">Breakpoints In Python</a>, Up: <a href="Python-API.html#Python-API" accesskey="u" rel="up">Python API</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="Finish-Breakpoints"></a> +<h4 class="subsubsection">23.3.2.32 Finish Breakpoints</h4> + +<a name="index-python-finish-breakpoints"></a> +<a name="index-gdb_002eFinishBreakpoint"></a> + +<p>A finish breakpoint is a temporary breakpoint set at the return address of +a frame, based on the <code>finish</code> command. <code>gdb.FinishBreakpoint</code> +extends <code>gdb.Breakpoint</code>. The underlying breakpoint will be disabled +and deleted when the execution will run out of the breakpoint scope (i.e. +<code>Breakpoint.stop</code> or <code>FinishBreakpoint.out_of_scope</code> triggered). +Finish breakpoints are thread specific and must be create with the right +thread selected. +</p> +<dl> +<dt><a name="index-FinishBreakpoint_002e_005f_005finit_005f_005f"></a>Function: <strong>FinishBreakpoint.__init__</strong> <em>(<span class="roman">[</span>frame<span class="roman">]</span> <span class="roman">[</span>, internal<span class="roman">]</span>)</em></dt> +<dd><p>Create a finish breakpoint at the return address of the <code>gdb.Frame</code> +object <var>frame</var>. If <var>frame</var> is not provided, this defaults to the +newest frame. The optional <var>internal</var> argument allows the breakpoint to +become invisible to the user. See <a href="Breakpoints-In-Python.html#Breakpoints-In-Python">Breakpoints In Python</a>, for further +details about this argument. +</p></dd></dl> + +<dl> +<dt><a name="index-FinishBreakpoint_002eout_005fof_005fscope"></a>Function: <strong>FinishBreakpoint.out_of_scope</strong> <em>(self)</em></dt> +<dd><p>In some circumstances (e.g. <code>longjmp</code>, C<tt>++</tt> exceptions, <small>GDB</small> +<code>return</code> command, …), a function may not properly terminate, and +thus never hit the finish breakpoint. When <small>GDB</small> notices such a +situation, the <code>out_of_scope</code> callback will be triggered. +</p> +<p>You may want to sub-class <code>gdb.FinishBreakpoint</code> and override this +method: +</p> +<div class="smallexample"> +<pre class="smallexample">class MyFinishBreakpoint (gdb.FinishBreakpoint) + def stop (self): + print ("normal finish") + return True + + def out_of_scope (): + print ("abnormal finish") +</pre></div> +</dd></dl> + +<dl> +<dt><a name="index-FinishBreakpoint_002ereturn_005fvalue"></a>Variable: <strong>FinishBreakpoint.return_value</strong></dt> +<dd><p>When <small>GDB</small> is stopped at a finish breakpoint and the frame +used to build the <code>gdb.FinishBreakpoint</code> object had debug symbols, this +attribute will contain a <code>gdb.Value</code> object corresponding to the return +value of the function. The value will be <code>None</code> if the function return +type is <code>void</code> or if the return value was not computable. This attribute +is not writable. +</p></dd></dl> + +<hr> +<div class="header"> +<p> +Next: <a href="Lazy-Strings-In-Python.html#Lazy-Strings-In-Python" accesskey="n" rel="next">Lazy Strings In Python</a>, Previous: <a href="Breakpoints-In-Python.html#Breakpoints-In-Python" accesskey="p" rel="previous">Breakpoints In Python</a>, Up: <a href="Python-API.html#Python-API" accesskey="u" rel="up">Python API</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> |