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191 lines
6.4 KiB
HTML
191 lines
6.4 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>TUI Overview (Debugging with GDB)</title>
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<meta name="description" content="TUI Overview (Debugging with GDB)">
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<meta name="keywords" content="TUI Overview (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="TUI.html#TUI" rel="up" title="TUI">
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<link href="TUI-Keys.html#TUI-Keys" rel="next" title="TUI Keys">
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<link href="TUI.html#TUI" rel="prev" title="TUI">
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<style type="text/css">
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a.summary-letter {text-decoration: none}
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div.display {margin-left: 3.2em}
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div.example {margin-left: 3.2em}
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kbd {font-style: oblique}
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span.nolinebreak {white-space: nowrap}
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span.roman {font-family: initial; font-weight: normal}
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span.sansserif {font-family: sans-serif; font-weight: normal}
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ul.no-bullet {list-style: none}
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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="TUI-Overview"></a>
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<div class="header">
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<p>
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Next: <a href="TUI-Keys.html#TUI-Keys" accesskey="n" rel="next">TUI Keys</a>, Up: <a href="TUI.html#TUI" accesskey="u" rel="up">TUI</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="TUI-Overview-1"></a>
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<h3 class="section">25.1 TUI Overview</h3>
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<p>In TUI mode, <small>GDB</small> can display several text windows:
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</p>
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<dl compact="compact">
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<dt><em>command</em></dt>
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<dd><p>This window is the <small>GDB</small> command window with the <small>GDB</small>
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prompt and the <small>GDB</small> output. The <small>GDB</small> input is still
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managed using readline.
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</p>
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</dd>
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<dt><em>source</em></dt>
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<dd><p>The source window shows the source file of the program. The current
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line and active breakpoints are displayed in this window.
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</p>
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</dd>
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<dt><em>assembly</em></dt>
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<dd><p>The assembly window shows the disassembly output of the program.
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</p>
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</dd>
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<dt><em>register</em></dt>
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<dd><p>This window shows the processor registers. Registers are highlighted
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when their values change.
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</p></dd>
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</dl>
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<p>The source and assembly windows show the current program position
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by highlighting the current line and marking it with a ‘<samp>></samp>’ marker.
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Breakpoints are indicated with two markers. The first marker
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indicates the breakpoint type:
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</p>
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<dl compact="compact">
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<dt><code>B</code></dt>
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<dd><p>Breakpoint which was hit at least once.
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</p>
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</dd>
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<dt><code>b</code></dt>
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<dd><p>Breakpoint which was never hit.
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</p>
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</dd>
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<dt><code>H</code></dt>
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<dd><p>Hardware breakpoint which was hit at least once.
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</p>
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</dd>
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<dt><code>h</code></dt>
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<dd><p>Hardware breakpoint which was never hit.
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</p></dd>
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</dl>
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<p>The second marker indicates whether the breakpoint is enabled or not:
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</p>
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<dl compact="compact">
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<dt><code>+</code></dt>
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<dd><p>Breakpoint is enabled.
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</p>
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</dd>
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<dt><code>-</code></dt>
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<dd><p>Breakpoint is disabled.
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</p></dd>
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</dl>
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<p>The source, assembly and register windows are updated when the current
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thread changes, when the frame changes, or when the program counter
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changes.
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</p>
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<p>These windows are not all visible at the same time. The command
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window is always visible. The others can be arranged in several
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layouts:
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</p>
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<ul>
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<li> source only,
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</li><li> assembly only,
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</li><li> source and assembly,
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</li><li> source and registers, or
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</li><li> assembly and registers.
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</li></ul>
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<p>A status line above the command window shows the following information:
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</p>
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<dl compact="compact">
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<dt><em>target</em></dt>
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<dd><p>Indicates the current <small>GDB</small> target.
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(see <a href="Targets.html#Targets">Specifying a Debugging Target</a>).
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</p>
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</dd>
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<dt><em>process</em></dt>
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<dd><p>Gives the current process or thread number.
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When no process is being debugged, this field is set to <code>No process</code>.
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</p>
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</dd>
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<dt><em>function</em></dt>
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<dd><p>Gives the current function name for the selected frame.
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The name is demangled if demangling is turned on (see <a href="Print-Settings.html#Print-Settings">Print Settings</a>).
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When there is no symbol corresponding to the current program counter,
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the string <code>??</code> is displayed.
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</p>
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</dd>
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<dt><em>line</em></dt>
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<dd><p>Indicates the current line number for the selected frame.
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When the current line number is not known, the string <code>??</code> is displayed.
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</p>
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</dd>
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<dt><em>pc</em></dt>
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<dd><p>Indicates the current program counter address.
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</p></dd>
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</dl>
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<hr>
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<div class="header">
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<p>
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Next: <a href="TUI-Keys.html#TUI-Keys" accesskey="n" rel="next">TUI Keys</a>, Up: <a href="TUI.html#TUI" accesskey="u" rel="up">TUI</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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</body>
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</html>
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