396 lines
9.5 KiB
C
396 lines
9.5 KiB
C
/* Python interface to program spaces.
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Copyright (C) 2010-2015 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "python-internal.h"
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#include "charset.h"
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#include "progspace.h"
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#include "objfiles.h"
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#include "language.h"
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#include "arch-utils.h"
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typedef struct
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{
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PyObject_HEAD
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/* The corresponding pspace. */
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struct program_space *pspace;
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/* Dictionary holding user-added attributes.
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This is the __dict__ attribute of the object. */
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PyObject *dict;
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/* The pretty-printer list of functions. */
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PyObject *printers;
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/* The frame filter list of functions. */
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PyObject *frame_filters;
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/* The type-printer list. */
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PyObject *type_printers;
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/* The debug method list. */
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PyObject *xmethods;
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} pspace_object;
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static PyTypeObject pspace_object_type
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CPYCHECKER_TYPE_OBJECT_FOR_TYPEDEF ("pspace_object");
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static const struct program_space_data *pspy_pspace_data_key;
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/* An Objfile method which returns the objfile's file name, or None. */
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static PyObject *
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pspy_get_filename (PyObject *self, void *closure)
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{
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pspace_object *obj = (pspace_object *) self;
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if (obj->pspace)
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{
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struct objfile *objfile = obj->pspace->symfile_object_file;
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if (objfile)
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return PyString_Decode (objfile_name (objfile),
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strlen (objfile_name (objfile)),
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host_charset (), NULL);
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}
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Py_RETURN_NONE;
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}
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static void
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pspy_dealloc (PyObject *self)
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{
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pspace_object *ps_self = (pspace_object *) self;
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Py_XDECREF (ps_self->dict);
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Py_XDECREF (ps_self->printers);
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Py_XDECREF (ps_self->frame_filters);
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Py_XDECREF (ps_self->type_printers);
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Py_XDECREF (ps_self->xmethods);
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Py_TYPE (self)->tp_free (self);
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}
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/* Initialize a pspace_object.
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The result is a boolean indicating success. */
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static int
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pspy_initialize (pspace_object *self)
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{
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self->pspace = NULL;
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self->dict = NULL;
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self->printers = PyList_New (0);
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if (self->printers == NULL)
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return 0;
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self->frame_filters = PyDict_New ();
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if (self->frame_filters == NULL)
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return 0;
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self->type_printers = PyList_New (0);
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if (self->type_printers == NULL)
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return 0;
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self->xmethods = PyList_New (0);
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if (self->xmethods == NULL)
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return 0;
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return 1;
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}
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static PyObject *
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pspy_new (PyTypeObject *type, PyObject *args, PyObject *keywords)
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{
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pspace_object *self = (pspace_object *) type->tp_alloc (type, 0);
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if (self)
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{
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if (!pspy_initialize (self))
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{
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Py_DECREF (self);
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return NULL;
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}
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}
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return (PyObject *) self;
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}
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PyObject *
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pspy_get_printers (PyObject *o, void *ignore)
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{
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pspace_object *self = (pspace_object *) o;
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Py_INCREF (self->printers);
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return self->printers;
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}
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static int
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pspy_set_printers (PyObject *o, PyObject *value, void *ignore)
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{
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PyObject *tmp;
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pspace_object *self = (pspace_object *) o;
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if (! value)
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{
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PyErr_SetString (PyExc_TypeError,
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"cannot delete the pretty_printers attribute");
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return -1;
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}
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if (! PyList_Check (value))
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{
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PyErr_SetString (PyExc_TypeError,
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"the pretty_printers attribute must be a list");
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return -1;
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}
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/* Take care in case the LHS and RHS are related somehow. */
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tmp = self->printers;
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Py_INCREF (value);
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self->printers = value;
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Py_XDECREF (tmp);
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return 0;
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}
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/* Return the Python dictionary attribute containing frame filters for
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this program space. */
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PyObject *
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pspy_get_frame_filters (PyObject *o, void *ignore)
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{
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pspace_object *self = (pspace_object *) o;
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Py_INCREF (self->frame_filters);
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return self->frame_filters;
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}
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/* Set this object file's frame filters dictionary to FILTERS. */
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static int
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pspy_set_frame_filters (PyObject *o, PyObject *frame, void *ignore)
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{
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PyObject *tmp;
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pspace_object *self = (pspace_object *) o;
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if (! frame)
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{
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PyErr_SetString (PyExc_TypeError,
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"cannot delete the frame filter attribute");
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return -1;
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}
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if (! PyDict_Check (frame))
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{
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PyErr_SetString (PyExc_TypeError,
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"the frame filter attribute must be a dictionary");
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return -1;
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}
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/* Take care in case the LHS and RHS are related somehow. */
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tmp = self->frame_filters;
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Py_INCREF (frame);
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self->frame_filters = frame;
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Py_XDECREF (tmp);
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return 0;
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}
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/* Get the 'type_printers' attribute. */
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static PyObject *
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pspy_get_type_printers (PyObject *o, void *ignore)
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{
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pspace_object *self = (pspace_object *) o;
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Py_INCREF (self->type_printers);
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return self->type_printers;
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}
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/* Get the 'xmethods' attribute. */
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PyObject *
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pspy_get_xmethods (PyObject *o, void *ignore)
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{
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pspace_object *self = (pspace_object *) o;
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Py_INCREF (self->xmethods);
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return self->xmethods;
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}
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/* Set the 'type_printers' attribute. */
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static int
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pspy_set_type_printers (PyObject *o, PyObject *value, void *ignore)
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{
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PyObject *tmp;
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pspace_object *self = (pspace_object *) o;
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if (! value)
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{
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PyErr_SetString (PyExc_TypeError,
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"cannot delete the type_printers attribute");
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return -1;
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}
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if (! PyList_Check (value))
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{
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PyErr_SetString (PyExc_TypeError,
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"the type_printers attribute must be a list");
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return -1;
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}
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/* Take care in case the LHS and RHS are related somehow. */
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tmp = self->type_printers;
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Py_INCREF (value);
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self->type_printers = value;
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Py_XDECREF (tmp);
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return 0;
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}
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/* Clear the PSPACE pointer in a Pspace object and remove the reference. */
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static void
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py_free_pspace (struct program_space *pspace, void *datum)
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{
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struct cleanup *cleanup;
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pspace_object *object = datum;
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/* This is a fiction, but we're in a nasty spot: The pspace is in the
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process of being deleted, we can't rely on anything in it. Plus
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this is one time when the current program space and current inferior
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are not in sync: All inferiors that use PSPACE may no longer exist.
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We don't need to do much here, and since "there is always an inferior"
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using target_gdbarch suffices.
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Note: We cannot call get_current_arch because it may try to access
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the target, which may involve accessing data in the pspace currently
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being deleted. */
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struct gdbarch *arch = target_gdbarch ();
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cleanup = ensure_python_env (arch, current_language);
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object->pspace = NULL;
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Py_DECREF ((PyObject *) object);
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do_cleanups (cleanup);
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}
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/* Return a borrowed reference to the Python object of type Pspace
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representing PSPACE. If the object has already been created,
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return it. Otherwise, create it. Return NULL and set the Python
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error on failure. */
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PyObject *
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pspace_to_pspace_object (struct program_space *pspace)
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{
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pspace_object *object;
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object = program_space_data (pspace, pspy_pspace_data_key);
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if (!object)
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{
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object = PyObject_New (pspace_object, &pspace_object_type);
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if (object)
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{
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if (!pspy_initialize (object))
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{
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Py_DECREF (object);
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return NULL;
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}
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object->pspace = pspace;
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set_program_space_data (pspace, pspy_pspace_data_key, object);
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}
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}
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return (PyObject *) object;
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}
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int
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gdbpy_initialize_pspace (void)
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{
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pspy_pspace_data_key
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= register_program_space_data_with_cleanup (NULL, py_free_pspace);
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if (PyType_Ready (&pspace_object_type) < 0)
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return -1;
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return gdb_pymodule_addobject (gdb_module, "Progspace",
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(PyObject *) &pspace_object_type);
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}
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static PyGetSetDef pspace_getset[] =
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{
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{ "__dict__", gdb_py_generic_dict, NULL,
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"The __dict__ for this progspace.", &pspace_object_type },
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{ "filename", pspy_get_filename, NULL,
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"The progspace's main filename, or None.", NULL },
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{ "pretty_printers", pspy_get_printers, pspy_set_printers,
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"Pretty printers.", NULL },
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{ "frame_filters", pspy_get_frame_filters, pspy_set_frame_filters,
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"Frame filters.", NULL },
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{ "type_printers", pspy_get_type_printers, pspy_set_type_printers,
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"Type printers.", NULL },
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{ "xmethods", pspy_get_xmethods, NULL,
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"Debug methods.", NULL },
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{ NULL }
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};
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static PyTypeObject pspace_object_type =
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{
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PyVarObject_HEAD_INIT (NULL, 0)
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"gdb.Progspace", /*tp_name*/
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sizeof (pspace_object), /*tp_basicsize*/
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0, /*tp_itemsize*/
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pspy_dealloc, /*tp_dealloc*/
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0, /*tp_print*/
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0, /*tp_getattr*/
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0, /*tp_setattr*/
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0, /*tp_compare*/
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0, /*tp_repr*/
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0, /*tp_as_number*/
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0, /*tp_as_sequence*/
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0, /*tp_as_mapping*/
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0, /*tp_hash */
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0, /*tp_call*/
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0, /*tp_str*/
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0, /*tp_getattro*/
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0, /*tp_setattro*/
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0, /*tp_as_buffer*/
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Py_TPFLAGS_DEFAULT, /*tp_flags*/
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"GDB progspace object", /* tp_doc */
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0, /* tp_traverse */
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0, /* tp_clear */
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0, /* tp_richcompare */
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0, /* tp_weaklistoffset */
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0, /* tp_iter */
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0, /* tp_iternext */
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0, /* tp_methods */
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0, /* tp_members */
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pspace_getset, /* tp_getset */
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0, /* tp_base */
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0, /* tp_dict */
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0, /* tp_descr_get */
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0, /* tp_descr_set */
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offsetof (pspace_object, dict), /* tp_dictoffset */
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0, /* tp_init */
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0, /* tp_alloc */
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pspy_new, /* tp_new */
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};
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