130 lines
4.8 KiB
HTML
130 lines
4.8 KiB
HTML
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<html lang="en">
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<head>
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<title>TUI Overview - Debugging with GDB</title>
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<meta http-equiv="Content-Type" content="text/html">
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<meta name="description" content="Debugging with GDB">
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<meta name="generator" content="makeinfo 4.13">
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<link title="Top" rel="start" href="index.html#Top">
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<link rel="up" href="TUI.html#TUI" title="TUI">
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<link rel="next" href="TUI-Keys.html#TUI-Keys" title="TUI Keys">
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<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
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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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</head>
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<body>
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<div class="node">
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<a name="TUI-Overview"></a>
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<p>
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Next: <a rel="next" accesskey="n" href="TUI-Keys.html#TUI-Keys">TUI Keys</a>,
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Up: <a rel="up" accesskey="u" href="TUI.html#TUI">TUI</a>
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<hr>
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</div>
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<h3 class="section">25.1 TUI Overview</h3>
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<p>In TUI mode, <span class="sc">gdb</span> can display several text windows:
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<dl>
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<dt><em>command</em><dd>This window is the <span class="sc">gdb</span> command window with the <span class="sc">gdb</span>
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prompt and the <span class="sc">gdb</span> output. The <span class="sc">gdb</span> input is still
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managed using readline.
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<br><dt><em>source</em><dd>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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<br><dt><em>assembly</em><dd>The assembly window shows the disassembly output of the program.
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<br><dt><em>register</em><dd>This window shows the processor registers. Registers are highlighted
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when their values change.
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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><span class="samp">></span></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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<dl>
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<dt><code>B</code><dd>Breakpoint which was hit at least once.
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<br><dt><code>b</code><dd>Breakpoint which was never hit.
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<br><dt><code>H</code><dd>Hardware breakpoint which was hit at least once.
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<br><dt><code>h</code><dd>Hardware breakpoint which was never hit.
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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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<dl>
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<dt><code>+</code><dd>Breakpoint is enabled.
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<br><dt><code>-</code><dd>Breakpoint is disabled.
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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>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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<ul>
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<li>source only,
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<li>assembly only,
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<li>source and assembly,
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<li>source and registers, or
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<li>assembly and registers.
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</ul>
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<p>A status line above the command window shows the following information:
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<dl>
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<dt><em>target</em><dd>Indicates the current <span class="sc">gdb</span> target.
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(see <a href="Targets.html#Targets">Specifying a Debugging Target</a>).
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<br><dt><em>process</em><dd>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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<br><dt><em>function</em><dd>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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<br><dt><em>line</em><dd>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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<br><dt><em>pc</em><dd>Indicates the current program counter address.
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</dl>
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</body></html>
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