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| <a name="Interpreters"></a> |
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| <a name="Command-Interpreters"></a> |
| <h2 class="chapter">24 Command Interpreters</h2> |
| <a name="index-command-interpreters"></a> |
| |
| <p><small>GDB</small> supports multiple command interpreters, and some command |
| infrastructure to allow users or user interface writers to switch |
| between interpreters or run commands in other interpreters. |
| </p> |
| <p><small>GDB</small> currently supports two command interpreters, the console |
| interpreter (sometimes called the command-line interpreter or <small>CLI</small>) |
| and the machine interface interpreter (or <small>GDB/MI</small>). This manual |
| describes both of these interfaces in great detail. |
| </p> |
| <p>By default, <small>GDB</small> will start with the console interpreter. |
| However, the user may choose to start <small>GDB</small> with another |
| interpreter by specifying the <samp>-i</samp> or <samp>--interpreter</samp> |
| startup options. Defined interpreters include: |
| </p> |
| <dl compact="compact"> |
| <dt><code>console</code></dt> |
| <dd><a name="index-console-interpreter"></a> |
| <p>The traditional console or command-line interpreter. This is the most often |
| used interpreter with <small>GDB</small>. With no interpreter specified at runtime, |
| <small>GDB</small> will use this interpreter. |
| </p> |
| </dd> |
| <dt><code>mi</code></dt> |
| <dd><a name="index-mi-interpreter"></a> |
| <p>The newest <small>GDB/MI</small> interface (currently <code>mi2</code>). Used primarily |
| by programs wishing to use <small>GDB</small> as a backend for a debugger GUI |
| or an IDE. For more information, see <a href="GDB_002fMI.html#GDB_002fMI">The <small>GDB/MI</small> |
| Interface</a>. |
| </p> |
| </dd> |
| <dt><code>mi2</code></dt> |
| <dd><a name="index-mi2-interpreter"></a> |
| <p>The current <small>GDB/MI</small> interface. |
| </p> |
| </dd> |
| <dt><code>mi1</code></dt> |
| <dd><a name="index-mi1-interpreter"></a> |
| <p>The <small>GDB/MI</small> interface included in <small>GDB</small> 5.1, 5.2, and 5.3. |
| </p> |
| </dd> |
| </dl> |
| |
| <a name="index-invoke-another-interpreter"></a> |
| <p>The interpreter being used by <small>GDB</small> may not be dynamically |
| switched at runtime. Although possible, this could lead to a very |
| precarious situation. Consider an IDE using <small>GDB/MI</small>. If a user |
| enters the command "interpreter-set console" in a console view, |
| <small>GDB</small> would switch to using the console interpreter, rendering |
| the IDE inoperable! |
| </p> |
| <a name="index-interpreter_002dexec"></a> |
| <p>Although you may only choose a single interpreter at startup, you may execute |
| commands in any interpreter from the current interpreter using the appropriate |
| command. If you are running the console interpreter, simply use the |
| <code>interpreter-exec</code> command: |
| </p> |
| <div class="smallexample"> |
| <pre class="smallexample">interpreter-exec mi "-data-list-register-names" |
| </pre></div> |
| |
| <p><small>GDB/MI</small> has a similar command, although it is only available in versions of |
| <small>GDB</small> which support <small>GDB/MI</small> version 2 (or greater). |
| </p> |
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