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| <h3 class="section">25.1 TUI Overview</h3> |
| |
| <p>In TUI mode, <span class="sc">gdb</span> can display several text windows: |
| |
| <dl> |
| <dt><em>command</em><dd>This window is the <span class="sc">gdb</span> command window with the <span class="sc">gdb</span> |
| prompt and the <span class="sc">gdb</span> output. The <span class="sc">gdb</span> input is still |
| managed using readline. |
| |
| <br><dt><em>source</em><dd>The source window shows the source file of the program. The current |
| line and active breakpoints are displayed in this window. |
| |
| <br><dt><em>assembly</em><dd>The assembly window shows the disassembly output of the program. |
| |
| <br><dt><em>register</em><dd>This window shows the processor registers. Registers are highlighted |
| when their values change. |
| </dl> |
| |
| <p>The source and assembly windows show the current program position |
| by highlighting the current line and marking it with a ‘<samp><span class="samp">></span></samp>’ marker. |
| Breakpoints are indicated with two markers. The first marker |
| indicates the breakpoint type: |
| |
| <dl> |
| <dt><code>B</code><dd>Breakpoint which was hit at least once. |
| |
| <br><dt><code>b</code><dd>Breakpoint which was never hit. |
| |
| <br><dt><code>H</code><dd>Hardware breakpoint which was hit at least once. |
| |
| <br><dt><code>h</code><dd>Hardware breakpoint which was never hit. |
| </dl> |
| |
| <p>The second marker indicates whether the breakpoint is enabled or not: |
| |
| <dl> |
| <dt><code>+</code><dd>Breakpoint is enabled. |
| |
| <br><dt><code>-</code><dd>Breakpoint is disabled. |
| </dl> |
| |
| <p>The source, assembly and register windows are updated when the current |
| thread changes, when the frame changes, or when the program counter |
| changes. |
| |
| <p>These windows are not all visible at the same time. The command |
| window is always visible. The others can be arranged in several |
| layouts: |
| |
| <ul> |
| <li>source only, |
| |
| <li>assembly only, |
| |
| <li>source and assembly, |
| |
| <li>source and registers, or |
| |
| <li>assembly and registers. |
| </ul> |
| |
| <p>A status line above the command window shows the following information: |
| |
| <dl> |
| <dt><em>target</em><dd>Indicates the current <span class="sc">gdb</span> target. |
| (see <a href="Targets.html#Targets">Specifying a Debugging Target</a>). |
| |
| <br><dt><em>process</em><dd>Gives the current process or thread number. |
| When no process is being debugged, this field is set to <code>No process</code>. |
| |
| <br><dt><em>function</em><dd>Gives the current function name for the selected frame. |
| The name is demangled if demangling is turned on (see <a href="Print-Settings.html#Print-Settings">Print Settings</a>). |
| When there is no symbol corresponding to the current program counter, |
| the string <code>??</code> is displayed. |
| |
| <br><dt><em>line</em><dd>Indicates the current line number for the selected frame. |
| When the current line number is not known, the string <code>??</code> is displayed. |
| |
| <br><dt><em>pc</em><dd>Indicates the current program counter address. |
| </dl> |
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