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| <h5 class="subsubsection">23.2.4.2 gdb.types</h5> |
| |
| <p><a name="index-gdb_002etypes-2444"></a> |
| This module provides a collection of utilities for working with |
| <code>gdb.Type</code> objects. |
| |
| <dl> |
| <dt><code>get_basic_type (</code><var>type</var><code>)</code><dd>Return <var>type</var> with const and volatile qualifiers stripped, |
| and with typedefs and C<tt>++</tt> references converted to the underlying type. |
| |
| <p>C<tt>++</tt> example: |
| |
| <pre class="smallexample"> typedef const int const_int; |
| const_int foo (3); |
| const_int& foo_ref (foo); |
| int main () { return 0; } |
| </pre> |
| <p>Then in gdb: |
| |
| <pre class="smallexample"> (gdb) start |
| (gdb) python import gdb.types |
| (gdb) python foo_ref = gdb.parse_and_eval("foo_ref") |
| (gdb) python print gdb.types.get_basic_type(foo_ref.type) |
| int |
| </pre> |
| <br><dt><code>has_field (</code><var>type</var><code>, </code><var>field</var><code>)</code><dd>Return <code>True</code> if <var>type</var>, assumed to be a type with fields |
| (e.g., a structure or union), has field <var>field</var>. |
| |
| <br><dt><code>make_enum_dict (</code><var>enum_type</var><code>)</code><dd>Return a Python <code>dictionary</code> type produced from <var>enum_type</var>. |
| |
| <br><dt><code>deep_items (</code><var>type</var><code>)</code><dd>Returns a Python iterator similar to the standard |
| <code>gdb.Type.iteritems</code> method, except that the iterator returned |
| by <code>deep_items</code> will recursively traverse anonymous struct or |
| union fields. For example: |
| |
| <pre class="smallexample"> struct A |
| { |
| int a; |
| union { |
| int b0; |
| int b1; |
| }; |
| }; |
| </pre> |
| <p class="noindent">Then in <span class="sc">gdb</span>: |
| <pre class="smallexample"> (gdb) python import gdb.types |
| (gdb) python struct_a = gdb.lookup_type("struct A") |
| (gdb) python print struct_a.keys () |
| {['a', '']} |
| (gdb) python print [k for k,v in gdb.types.deep_items(struct_a)] |
| {['a', 'b0', 'b1']} |
| </pre> |
| <br><dt><code>get_type_recognizers ()</code><dd>Return a list of the enabled type recognizers for the current context. |
| This is called by <span class="sc">gdb</span> during the type-printing process |
| (see <a href="Type-Printing-API.html#Type-Printing-API">Type Printing API</a>). |
| |
| <br><dt><code>apply_type_recognizers (recognizers, type_obj)</code><dd>Apply the type recognizers, <var>recognizers</var>, to the type object |
| <var>type_obj</var>. If any recognizer returns a string, return that |
| string. Otherwise, return <code>None</code>. This is called by |
| <span class="sc">gdb</span> during the type-printing process (see <a href="Type-Printing-API.html#Type-Printing-API">Type Printing API</a>). |
| |
| <br><dt><code>register_type_printer (locus, printer)</code><dd>This is a convenience function to register a type printer |
| <var>printer</var>. The printer must implement the type printer protocol. |
| The <var>locus</var> argument is either a <code>gdb.Objfile</code>, in which case |
| the printer is registered with that objfile; a <code>gdb.Progspace</code>, |
| in which case the printer is registered with that progspace; or |
| <code>None</code>, in which case the printer is registered globally. |
| |
| <br><dt><code>TypePrinter</code><dd>This is a base class that implements the type printer protocol. Type |
| printers are encouraged, but not required, to derive from this class. |
| It defines a constructor: |
| |
| <div class="defun"> |
| — Method on TypePrinter: <b>__init__</b> (<var>self, name</var>)<var><a name="index-g_t_005f_005finit_005f_005f-on-TypePrinter-2445"></a></var><br> |
| <blockquote> <p>Initialize the type printer with the given name. The new printer |
| starts in the enabled state. |
| </p></blockquote></div> |
| |
| </dl> |
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