mirror of
https://sourceware.org/git/binutils-gdb.git
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658 lines
18 KiB
C
658 lines
18 KiB
C
/* Python interface to symbol tables.
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Copyright (C) 2008-2018 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 "charset.h"
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#include "symtab.h"
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#include "source.h"
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#include "python-internal.h"
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#include "objfiles.h"
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#include "block.h"
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#include "py-ref.h"
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typedef struct stpy_symtab_object {
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PyObject_HEAD
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/* The GDB Symbol table structure. */
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struct symtab *symtab;
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/* A symtab object is associated with an objfile, so keep track with
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a doubly-linked list, rooted in the objfile. This allows
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invalidation of the underlying struct symtab when the objfile is
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deleted. */
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struct stpy_symtab_object *prev;
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struct stpy_symtab_object *next;
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} symtab_object;
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extern PyTypeObject symtab_object_type
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CPYCHECKER_TYPE_OBJECT_FOR_TYPEDEF ("symtab_object");
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static const struct objfile_data *stpy_objfile_data_key;
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/* Require a valid symbol table. All access to symtab_object->symtab
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should be gated by this call. */
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#define STPY_REQUIRE_VALID(symtab_obj, symtab) \
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do { \
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symtab = symtab_object_to_symtab (symtab_obj); \
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if (symtab == NULL) \
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{ \
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PyErr_SetString (PyExc_RuntimeError, \
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_("Symbol Table is invalid.")); \
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return NULL; \
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} \
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} while (0)
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typedef struct salpy_sal_object {
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PyObject_HEAD
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/* The GDB Symbol table structure. */
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symtab_object *symtab;
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/* The GDB Symbol table and line structure. */
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struct symtab_and_line *sal;
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/* A Symtab and line object is associated with an objfile, so keep
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track with a doubly-linked list, rooted in the objfile. This
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allows invalidation of the underlying struct symtab_and_line
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when the objfile is deleted. */
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struct salpy_sal_object *prev;
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struct salpy_sal_object *next;
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} sal_object;
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extern PyTypeObject sal_object_type
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CPYCHECKER_TYPE_OBJECT_FOR_TYPEDEF ("sal_object");
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static const struct objfile_data *salpy_objfile_data_key;
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/* Require a valid symbol table and line object. All access to
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sal_object->sal should be gated by this call. */
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#define SALPY_REQUIRE_VALID(sal_obj, sal) \
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do { \
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sal = sal_object_to_symtab_and_line (sal_obj); \
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if (sal == NULL) \
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{ \
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PyErr_SetString (PyExc_RuntimeError, \
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_("Symbol Table and Line is invalid.")); \
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return NULL; \
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} \
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} while (0)
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static PyObject *
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stpy_str (PyObject *self)
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{
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PyObject *result;
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struct symtab *symtab = NULL;
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STPY_REQUIRE_VALID (self, symtab);
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result = PyString_FromString (symtab_to_filename_for_display (symtab));
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return result;
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}
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static PyObject *
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stpy_get_filename (PyObject *self, void *closure)
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{
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PyObject *str_obj;
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struct symtab *symtab = NULL;
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const char *filename;
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STPY_REQUIRE_VALID (self, symtab);
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filename = symtab_to_filename_for_display (symtab);
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str_obj = host_string_to_python_string (filename);
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return str_obj;
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}
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static PyObject *
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stpy_get_objfile (PyObject *self, void *closure)
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{
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struct symtab *symtab = NULL;
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PyObject *result;
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STPY_REQUIRE_VALID (self, symtab);
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result = objfile_to_objfile_object (SYMTAB_OBJFILE (symtab));
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Py_XINCREF (result);
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return result;
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}
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/* Getter function for symtab.producer. */
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static PyObject *
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stpy_get_producer (PyObject *self, void *closure)
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{
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struct symtab *symtab = NULL;
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struct compunit_symtab *cust;
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STPY_REQUIRE_VALID (self, symtab);
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cust = SYMTAB_COMPUNIT (symtab);
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if (COMPUNIT_PRODUCER (cust) != NULL)
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{
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const char *producer = COMPUNIT_PRODUCER (cust);
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return host_string_to_python_string (producer);
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}
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Py_RETURN_NONE;
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}
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static PyObject *
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stpy_fullname (PyObject *self, PyObject *args)
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{
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const char *fullname;
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struct symtab *symtab = NULL;
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STPY_REQUIRE_VALID (self, symtab);
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fullname = symtab_to_fullname (symtab);
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return host_string_to_python_string (fullname);
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}
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/* Implementation of gdb.Symtab.is_valid (self) -> Boolean.
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Returns True if this Symbol table still exists in GDB. */
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static PyObject *
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stpy_is_valid (PyObject *self, PyObject *args)
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{
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struct symtab *symtab = NULL;
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symtab = symtab_object_to_symtab (self);
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if (symtab == NULL)
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Py_RETURN_FALSE;
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Py_RETURN_TRUE;
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}
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/* Return the GLOBAL_BLOCK of the underlying symtab. */
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static PyObject *
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stpy_global_block (PyObject *self, PyObject *args)
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{
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struct symtab *symtab = NULL;
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struct block *block = NULL;
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const struct blockvector *blockvector;
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STPY_REQUIRE_VALID (self, symtab);
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blockvector = SYMTAB_BLOCKVECTOR (symtab);
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block = BLOCKVECTOR_BLOCK (blockvector, GLOBAL_BLOCK);
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return block_to_block_object (block, SYMTAB_OBJFILE (symtab));
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}
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/* Return the STATIC_BLOCK of the underlying symtab. */
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static PyObject *
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stpy_static_block (PyObject *self, PyObject *args)
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{
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struct symtab *symtab = NULL;
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struct block *block = NULL;
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const struct blockvector *blockvector;
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STPY_REQUIRE_VALID (self, symtab);
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blockvector = SYMTAB_BLOCKVECTOR (symtab);
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block = BLOCKVECTOR_BLOCK (blockvector, STATIC_BLOCK);
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return block_to_block_object (block, SYMTAB_OBJFILE (symtab));
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}
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/* Implementation of gdb.Symtab.linetable (self) -> gdb.LineTable.
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Returns a gdb.LineTable object corresponding to this symbol
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table. */
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static PyObject *
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stpy_get_linetable (PyObject *self, PyObject *args)
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{
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struct symtab *symtab = NULL;
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STPY_REQUIRE_VALID (self, symtab);
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return symtab_to_linetable_object (self);
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}
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static PyObject *
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salpy_str (PyObject *self)
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{
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char *s;
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const char *filename;
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sal_object *sal_obj;
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PyObject *result;
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struct symtab_and_line *sal = NULL;
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SALPY_REQUIRE_VALID (self, sal);
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sal_obj = (sal_object *) self;
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filename = (sal_obj->symtab == (symtab_object *) Py_None)
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? "<unknown>" : symtab_to_filename_for_display (sal_obj->symtab->symtab);
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s = xstrprintf ("symbol and line for %s, line %d", filename,
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sal->line);
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result = PyString_FromString (s);
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xfree (s);
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return result;
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}
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static void
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stpy_dealloc (PyObject *obj)
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{
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symtab_object *symtab = (symtab_object *) obj;
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if (symtab->prev)
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symtab->prev->next = symtab->next;
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else if (symtab->symtab)
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{
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set_objfile_data (SYMTAB_OBJFILE (symtab->symtab),
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stpy_objfile_data_key, symtab->next);
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}
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if (symtab->next)
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symtab->next->prev = symtab->prev;
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symtab->symtab = NULL;
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}
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static PyObject *
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salpy_get_pc (PyObject *self, void *closure)
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{
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struct symtab_and_line *sal = NULL;
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SALPY_REQUIRE_VALID (self, sal);
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return gdb_py_long_from_ulongest (sal->pc);
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}
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/* Implementation of the get method for the 'last' attribute of
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gdb.Symtab_and_line. */
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static PyObject *
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salpy_get_last (PyObject *self, void *closure)
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{
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struct symtab_and_line *sal = NULL;
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SALPY_REQUIRE_VALID (self, sal);
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if (sal->end > 0)
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return gdb_py_long_from_ulongest (sal->end - 1);
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else
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Py_RETURN_NONE;
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}
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static PyObject *
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salpy_get_line (PyObject *self, void *closure)
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{
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struct symtab_and_line *sal = NULL;
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SALPY_REQUIRE_VALID (self, sal);
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return PyInt_FromLong (sal->line);
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}
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static PyObject *
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salpy_get_symtab (PyObject *self, void *closure)
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{
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struct symtab_and_line *sal;
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sal_object *self_sal = (sal_object *) self;
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SALPY_REQUIRE_VALID (self, sal);
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Py_INCREF (self_sal->symtab);
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return (PyObject *) self_sal->symtab;
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}
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/* Implementation of gdb.Symtab_and_line.is_valid (self) -> Boolean.
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Returns True if this Symbol table and line object still exists GDB. */
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static PyObject *
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salpy_is_valid (PyObject *self, PyObject *args)
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{
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struct symtab_and_line *sal;
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sal = sal_object_to_symtab_and_line (self);
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if (sal == NULL)
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Py_RETURN_FALSE;
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Py_RETURN_TRUE;
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}
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static void
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salpy_dealloc (PyObject *self)
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{
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sal_object *self_sal = (sal_object *) self;
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if (self_sal->prev)
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self_sal->prev->next = self_sal->next;
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else if (self_sal->symtab != (symtab_object * ) Py_None)
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set_objfile_data (SYMTAB_OBJFILE (self_sal->symtab->symtab),
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salpy_objfile_data_key, self_sal->next);
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if (self_sal->next)
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self_sal->next->prev = self_sal->prev;
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Py_DECREF (self_sal->symtab);
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xfree (self_sal->sal);
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Py_TYPE (self)->tp_free (self);
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}
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/* Given a sal, and a sal_object that has previously been allocated
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and initialized, populate the sal_object with the struct sal data.
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Also, register the sal_object life-cycle with the life-cycle of the
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object file associated with this sal, if needed. If a failure
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occurs during the sal population, this function will return -1. */
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static int CPYCHECKER_NEGATIVE_RESULT_SETS_EXCEPTION
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set_sal (sal_object *sal_obj, struct symtab_and_line sal)
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{
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symtab_object *symtab_obj;
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if (sal.symtab)
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{
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symtab_obj = (symtab_object *) symtab_to_symtab_object (sal.symtab);
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/* If a symtab existed in the sal, but it cannot be duplicated,
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we exit. */
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if (symtab_obj == NULL)
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return -1;
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}
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else
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{
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symtab_obj = (symtab_object *) Py_None;
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Py_INCREF (Py_None);
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}
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sal_obj->sal = ((struct symtab_and_line *)
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xmemdup (&sal, sizeof (struct symtab_and_line),
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sizeof (struct symtab_and_line)));
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sal_obj->symtab = symtab_obj;
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sal_obj->prev = NULL;
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/* If the SAL does not have a symtab, we do not add it to the
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objfile cleanup observer linked list. */
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if (sal_obj->symtab != (symtab_object *)Py_None)
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{
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sal_obj->next
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= ((struct salpy_sal_object *)
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objfile_data (SYMTAB_OBJFILE (sal_obj->symtab->symtab),
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salpy_objfile_data_key));
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if (sal_obj->next)
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sal_obj->next->prev = sal_obj;
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set_objfile_data (SYMTAB_OBJFILE (sal_obj->symtab->symtab),
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salpy_objfile_data_key, sal_obj);
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}
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else
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sal_obj->next = NULL;
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return 0;
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}
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/* Given a symtab, and a symtab_object that has previously been
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allocated and initialized, populate the symtab_object with the
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struct symtab data. Also, register the symtab_object life-cycle
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with the life-cycle of the object file associated with this
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symtab, if needed. */
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static void
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set_symtab (symtab_object *obj, struct symtab *symtab)
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{
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obj->symtab = symtab;
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obj->prev = NULL;
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if (symtab)
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{
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obj->next
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= ((struct stpy_symtab_object *)
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objfile_data (SYMTAB_OBJFILE (symtab), stpy_objfile_data_key));
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if (obj->next)
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obj->next->prev = obj;
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set_objfile_data (SYMTAB_OBJFILE (symtab), stpy_objfile_data_key, obj);
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}
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else
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obj->next = NULL;
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}
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/* Create a new symbol table (gdb.Symtab) object that encapsulates the
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symtab structure from GDB. */
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PyObject *
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symtab_to_symtab_object (struct symtab *symtab)
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{
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symtab_object *symtab_obj;
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symtab_obj = PyObject_New (symtab_object, &symtab_object_type);
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if (symtab_obj)
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set_symtab (symtab_obj, symtab);
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return (PyObject *) symtab_obj;
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}
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/* Create a new symtab and line (gdb.Symtab_and_line) object
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that encapsulates the symtab_and_line structure from GDB. */
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PyObject *
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symtab_and_line_to_sal_object (struct symtab_and_line sal)
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{
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gdbpy_ref<sal_object> sal_obj (PyObject_New (sal_object, &sal_object_type));
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if (sal_obj != NULL)
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{
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if (set_sal (sal_obj.get (), sal) < 0)
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return NULL;
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}
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return (PyObject *) sal_obj.release ();
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}
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/* Return struct symtab_and_line reference that is wrapped by this
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object. */
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struct symtab_and_line *
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sal_object_to_symtab_and_line (PyObject *obj)
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{
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if (! PyObject_TypeCheck (obj, &sal_object_type))
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return NULL;
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return ((sal_object *) obj)->sal;
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}
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/* Return struct symtab reference that is wrapped by this object. */
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struct symtab *
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symtab_object_to_symtab (PyObject *obj)
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{
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if (! PyObject_TypeCheck (obj, &symtab_object_type))
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return NULL;
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return ((symtab_object *) obj)->symtab;
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}
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/* This function is called when an objfile is about to be freed.
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Invalidate the symbol table as further actions on the symbol table
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would result in bad data. All access to obj->symtab should be
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gated by STPY_REQUIRE_VALID which will raise an exception on
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invalid symbol tables. */
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static void
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del_objfile_symtab (struct objfile *objfile, void *datum)
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{
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symtab_object *obj = (symtab_object *) datum;
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while (obj)
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{
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symtab_object *next = obj->next;
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obj->symtab = NULL;
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obj->next = NULL;
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obj->prev = NULL;
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obj = next;
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}
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}
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/* This function is called when an objfile is about to be freed.
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Invalidate the sal object as further actions on the sal
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would result in bad data. All access to obj->sal should be
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gated by SALPY_REQUIRE_VALID which will raise an exception on
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invalid symbol table and line objects. */
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static void
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del_objfile_sal (struct objfile *objfile, void *datum)
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{
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sal_object *obj = (sal_object *) datum;
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while (obj)
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{
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sal_object *next = obj->next;
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Py_DECREF (obj->symtab);
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obj->symtab = (symtab_object *) Py_None;
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Py_INCREF (Py_None);
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obj->next = NULL;
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obj->prev = NULL;
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xfree (obj->sal);
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obj->sal = NULL;
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obj = next;
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}
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}
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int
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gdbpy_initialize_symtabs (void)
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{
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symtab_object_type.tp_new = PyType_GenericNew;
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if (PyType_Ready (&symtab_object_type) < 0)
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return -1;
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sal_object_type.tp_new = PyType_GenericNew;
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if (PyType_Ready (&sal_object_type) < 0)
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return -1;
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/* Register an objfile "free" callback so we can properly
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invalidate symbol tables, and symbol table and line data
|
||
structures when an object file that is about to be
|
||
deleted. */
|
||
stpy_objfile_data_key
|
||
= register_objfile_data_with_cleanup (NULL, del_objfile_symtab);
|
||
salpy_objfile_data_key
|
||
= register_objfile_data_with_cleanup (NULL, del_objfile_sal);
|
||
|
||
if (gdb_pymodule_addobject (gdb_module, "Symtab",
|
||
(PyObject *) &symtab_object_type) < 0)
|
||
return -1;
|
||
|
||
return gdb_pymodule_addobject (gdb_module, "Symtab_and_line",
|
||
(PyObject *) &sal_object_type);
|
||
}
|
||
|
||
|
||
|
||
static gdb_PyGetSetDef symtab_object_getset[] = {
|
||
{ "filename", stpy_get_filename, NULL,
|
||
"The symbol table's source filename.", NULL },
|
||
{ "objfile", stpy_get_objfile, NULL, "The symtab's objfile.",
|
||
NULL },
|
||
{ "producer", stpy_get_producer, NULL,
|
||
"The name/version of the program that compiled this symtab.", NULL },
|
||
{NULL} /* Sentinel */
|
||
};
|
||
|
||
static PyMethodDef symtab_object_methods[] = {
|
||
{ "is_valid", stpy_is_valid, METH_NOARGS,
|
||
"is_valid () -> Boolean.\n\
|
||
Return true if this symbol table is valid, false if not." },
|
||
{ "fullname", stpy_fullname, METH_NOARGS,
|
||
"fullname () -> String.\n\
|
||
Return the symtab's full source filename." },
|
||
{ "global_block", stpy_global_block, METH_NOARGS,
|
||
"global_block () -> gdb.Block.\n\
|
||
Return the global block of the symbol table." },
|
||
{ "static_block", stpy_static_block, METH_NOARGS,
|
||
"static_block () -> gdb.Block.\n\
|
||
Return the static block of the symbol table." },
|
||
{ "linetable", stpy_get_linetable, METH_NOARGS,
|
||
"linetable () -> gdb.LineTable.\n\
|
||
Return the LineTable associated with this symbol table" },
|
||
{NULL} /* Sentinel */
|
||
};
|
||
|
||
PyTypeObject symtab_object_type = {
|
||
PyVarObject_HEAD_INIT (NULL, 0)
|
||
"gdb.Symtab", /*tp_name*/
|
||
sizeof (symtab_object), /*tp_basicsize*/
|
||
0, /*tp_itemsize*/
|
||
stpy_dealloc, /*tp_dealloc*/
|
||
0, /*tp_print*/
|
||
0, /*tp_getattr*/
|
||
0, /*tp_setattr*/
|
||
0, /*tp_compare*/
|
||
0, /*tp_repr*/
|
||
0, /*tp_as_number*/
|
||
0, /*tp_as_sequence*/
|
||
0, /*tp_as_mapping*/
|
||
0, /*tp_hash */
|
||
0, /*tp_call*/
|
||
stpy_str, /*tp_str*/
|
||
0, /*tp_getattro*/
|
||
0, /*tp_setattro*/
|
||
0, /*tp_as_buffer*/
|
||
Py_TPFLAGS_DEFAULT, /*tp_flags*/
|
||
"GDB symtab object", /*tp_doc */
|
||
0, /*tp_traverse */
|
||
0, /*tp_clear */
|
||
0, /*tp_richcompare */
|
||
0, /*tp_weaklistoffset */
|
||
0, /*tp_iter */
|
||
0, /*tp_iternext */
|
||
symtab_object_methods, /*tp_methods */
|
||
0, /*tp_members */
|
||
symtab_object_getset /*tp_getset */
|
||
};
|
||
|
||
static gdb_PyGetSetDef sal_object_getset[] = {
|
||
{ "symtab", salpy_get_symtab, NULL, "Symtab object.", NULL },
|
||
{ "pc", salpy_get_pc, NULL, "Return the symtab_and_line's pc.", NULL },
|
||
{ "last", salpy_get_last, NULL,
|
||
"Return the symtab_and_line's last address.", NULL },
|
||
{ "line", salpy_get_line, NULL,
|
||
"Return the symtab_and_line's line.", NULL },
|
||
{NULL} /* Sentinel */
|
||
};
|
||
|
||
static PyMethodDef sal_object_methods[] = {
|
||
{ "is_valid", salpy_is_valid, METH_NOARGS,
|
||
"is_valid () -> Boolean.\n\
|
||
Return true if this symbol table and line is valid, false if not." },
|
||
{NULL} /* Sentinel */
|
||
};
|
||
|
||
PyTypeObject sal_object_type = {
|
||
PyVarObject_HEAD_INIT (NULL, 0)
|
||
"gdb.Symtab_and_line", /*tp_name*/
|
||
sizeof (sal_object), /*tp_basicsize*/
|
||
0, /*tp_itemsize*/
|
||
salpy_dealloc, /*tp_dealloc*/
|
||
0, /*tp_print*/
|
||
0, /*tp_getattr*/
|
||
0, /*tp_setattr*/
|
||
0, /*tp_compare*/
|
||
0, /*tp_repr*/
|
||
0, /*tp_as_number*/
|
||
0, /*tp_as_sequence*/
|
||
0, /*tp_as_mapping*/
|
||
0, /*tp_hash */
|
||
0, /*tp_call*/
|
||
salpy_str, /*tp_str*/
|
||
0, /*tp_getattro*/
|
||
0, /*tp_setattro*/
|
||
0, /*tp_as_buffer*/
|
||
Py_TPFLAGS_DEFAULT, /*tp_flags*/
|
||
"GDB symtab_and_line object", /*tp_doc */
|
||
0, /*tp_traverse */
|
||
0, /*tp_clear */
|
||
0, /*tp_richcompare */
|
||
0, /*tp_weaklistoffset */
|
||
0, /*tp_iter */
|
||
0, /*tp_iternext */
|
||
sal_object_methods, /*tp_methods */
|
||
0, /*tp_members */
|
||
sal_object_getset /*tp_getset */
|
||
};
|