gdb.types (Debugging with GDB)

#### 23.3.4.2 gdb.types ¶

This module provides a collection of utilities for working with `gdb.Type` objects.

`get_basic_type (type)`

  Return type with const and volatile qualifiers stripped, and with typedefs and C`++` references converted to the underlying type.

  C`++` example:

      typedef const int const_int;
      const_int foo (3);
      const_int& foo_ref (foo);
      int main () { return 0; }

  Then in gdb:

      (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

`has_field (type, field)`

  Return `True` if type, assumed to be a type with fields (e.g., a structure or union), has field field.

`make_enum_dict (enum_type)`

  Return a Python `dictionary` type produced from enum_type.

`deep_items (type)`

  Returns a Python iterator similar to the standard `gdb.Type.iteritems` method, except that the iterator returned by `deep_items` will recursively traverse anonymous struct or union fields. For example:

      struct A
      {
          int a;
          union {
              int b0;
              int b1;
          };
      };

  Then in GDB:

      (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']}

`get_type_recognizers ()`

  Return a list of the enabled type recognizers for the current context. This is called by GDB during the type-printing process (see Type Printing API).

`apply_type_recognizers (recognizers, type_obj)`

  Apply the type recognizers, recognizers, to the type object type_obj. If any recognizer returns a string, return that string. Otherwise, return `None`. This is called by GDB during the type-printing process (see Type Printing API).

`register_type_printer (locus, printer)`

  This is a convenience function to register a type printer printer. The printer must implement the type printer protocol. The locus argument is either a `gdb.Objfile`, in which case the printer is registered with that objfile; a `gdb.Progspace`, in which case the printer is registered with that progspace; or `None`, in which case the printer is registered globally.

`TypePrinter`

  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:

  Method on `TypePrinter`: __init__ (self, name) ¶

    Initialize the type printer with the given name. The new printer starts in the enabled state.