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Do not expose stub types to Python

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dwarf2read.c will create stub types for Ada "Taft Amendment" types.
These stub types can currently be exposed to Python code, where they
show up as TYPE_CODE_VOID types (but that, mysteriously, can sometimes
be used in other ways).

While it's possible to work with such types by using strip_typedefs,
this seemed unpleasant to me.  This patch takes another approach
instead, which is to try not to expose stub types to Python users.

gdb/ChangeLog
2019-09-26  Tom Tromey  <tromey@adacore.com>

	* python/py-type.c (type_to_type_object): Call check_typedef
	for stub types.

gdb/testsuite/ChangeLog
2019-09-26  Tom Tromey  <tromey@adacore.com>

	* gdb.ada/py_taft.exp: New file.
	* gdb.ada/py_taft/main.adb: New file.
	* gdb.ada/py_taft/pkg.adb: New file.
	* gdb.ada/py_taft/pkg.ads: New file.
This commit is contained in:
Tom Tromey
2019-08-19 13:41:34 -06:00
parent 12904d3729
commit 5d63b30afa
7 changed files with 132 additions and 0 deletions
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11
gdb/python/py-type.c
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@ -1334,6 +1334,17 @@ type_to_type_object (struct type *type)
{
type_object *type_obj;
try
{
/* Try not to let stub types leak out to Python. */
if (TYPE_STUB (type))
type = check_typedef (type);
}
catch (...)
{
/* Just ignore failures in check_typedef. */
}
type_obj = PyObject_New (type_object, &type_object_type);
if (type_obj)
set_type (type_obj, type);