mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-21 04:42:53 +08:00
3fabc0163a
py-ref.h can really only be included from a specific spot in python-internal.h. The other includes are not useful, and cause compilation errors if the includes are ever sorted. So, remove these includes. Arguably, py-ref.h should simply not be a separate header. gdb/ChangeLog 2019-01-22 Tom Tromey <tom@tromey.com> * python/py-arch.c: Do not include py-ref.h. * python/py-bpevent.c: Do not include py-ref.h. * python/py-cmd.c: Do not include py-ref.h. * python/py-continueevent.c: Do not include py-ref.h. * python/py-event.h: Do not include py-ref.h. * python/py-evtregistry.c: Do not include py-ref.h. * python/py-finishbreakpoint.c: Do not include py-ref.h. * python/py-frame.c: Do not include py-ref.h. * python/py-framefilter.c: Do not include py-ref.h. * python/py-function.c: Do not include py-ref.h. * python/py-infevents.c: Do not include py-ref.h. * python/py-linetable.c: Do not include py-ref.h. * python/py-objfile.c: Do not include py-ref.h. * python/py-param.c: Do not include py-ref.h. * python/py-prettyprint.c: Do not include py-ref.h. * python/py-progspace.c: Do not include py-ref.h. * python/py-symbol.c: Do not include py-ref.h. * python/py-symtab.c: Do not include py-ref.h. * python/py-type.c: Do not include py-ref.h. * python/py-unwind.c: Do not include py-ref.h. * python/py-utils.c: Do not include py-ref.h. * python/py-value.c: Do not include py-ref.h. * python/py-varobj.c: Do not include py-ref.h. * python/py-xmethods.c: Do not include py-ref.h. * python/python.c: Do not include py-ref.h. * varobj.c: Do not include py-ref.h.
647 lines
18 KiB
C
647 lines
18 KiB
C
/* Python interface to symbols.
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Copyright (C) 2008-2019 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 "block.h"
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#include "frame.h"
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#include "symtab.h"
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#include "python-internal.h"
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#include "objfiles.h"
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typedef struct sympy_symbol_object {
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PyObject_HEAD
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/* The GDB symbol structure this object is wrapping. */
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struct symbol *symbol;
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/* A symbol object is associated with an objfile, so keep track with
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doubly-linked list, rooted in the objfile. This lets us
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invalidate the underlying struct symbol when the objfile is
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deleted. */
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struct sympy_symbol_object *prev;
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struct sympy_symbol_object *next;
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} symbol_object;
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/* Require a valid symbol. All access to symbol_object->symbol should be
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gated by this call. */
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#define SYMPY_REQUIRE_VALID(symbol_obj, symbol) \
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do { \
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symbol = symbol_object_to_symbol (symbol_obj); \
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if (symbol == NULL) \
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{ \
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PyErr_SetString (PyExc_RuntimeError, \
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_("Symbol is invalid.")); \
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return NULL; \
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} \
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} while (0)
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static const struct objfile_data *sympy_objfile_data_key;
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static PyObject *
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sympy_str (PyObject *self)
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{
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PyObject *result;
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struct symbol *symbol = NULL;
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SYMPY_REQUIRE_VALID (self, symbol);
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result = PyString_FromString (SYMBOL_PRINT_NAME (symbol));
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return result;
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}
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static PyObject *
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sympy_get_type (PyObject *self, void *closure)
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{
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struct symbol *symbol = NULL;
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SYMPY_REQUIRE_VALID (self, symbol);
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if (SYMBOL_TYPE (symbol) == NULL)
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{
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Py_INCREF (Py_None);
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return Py_None;
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}
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return type_to_type_object (SYMBOL_TYPE (symbol));
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}
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static PyObject *
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sympy_get_symtab (PyObject *self, void *closure)
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{
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struct symbol *symbol = NULL;
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SYMPY_REQUIRE_VALID (self, symbol);
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if (!SYMBOL_OBJFILE_OWNED (symbol))
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Py_RETURN_NONE;
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return symtab_to_symtab_object (symbol_symtab (symbol));
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}
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static PyObject *
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sympy_get_name (PyObject *self, void *closure)
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{
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struct symbol *symbol = NULL;
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SYMPY_REQUIRE_VALID (self, symbol);
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return PyString_FromString (SYMBOL_NATURAL_NAME (symbol));
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}
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static PyObject *
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sympy_get_linkage_name (PyObject *self, void *closure)
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{
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struct symbol *symbol = NULL;
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SYMPY_REQUIRE_VALID (self, symbol);
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return PyString_FromString (SYMBOL_LINKAGE_NAME (symbol));
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}
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static PyObject *
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sympy_get_print_name (PyObject *self, void *closure)
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{
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struct symbol *symbol = NULL;
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SYMPY_REQUIRE_VALID (self, symbol);
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return sympy_str (self);
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}
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static PyObject *
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sympy_get_addr_class (PyObject *self, void *closure)
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{
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struct symbol *symbol = NULL;
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SYMPY_REQUIRE_VALID (self, symbol);
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return PyInt_FromLong (SYMBOL_CLASS (symbol));
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}
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static PyObject *
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sympy_is_argument (PyObject *self, void *closure)
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{
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struct symbol *symbol = NULL;
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SYMPY_REQUIRE_VALID (self, symbol);
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return PyBool_FromLong (SYMBOL_IS_ARGUMENT (symbol));
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}
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static PyObject *
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sympy_is_constant (PyObject *self, void *closure)
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{
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struct symbol *symbol = NULL;
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enum address_class theclass;
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SYMPY_REQUIRE_VALID (self, symbol);
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theclass = SYMBOL_CLASS (symbol);
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return PyBool_FromLong (theclass == LOC_CONST || theclass == LOC_CONST_BYTES);
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}
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static PyObject *
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sympy_is_function (PyObject *self, void *closure)
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{
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struct symbol *symbol = NULL;
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enum address_class theclass;
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SYMPY_REQUIRE_VALID (self, symbol);
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theclass = SYMBOL_CLASS (symbol);
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return PyBool_FromLong (theclass == LOC_BLOCK);
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}
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static PyObject *
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sympy_is_variable (PyObject *self, void *closure)
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{
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struct symbol *symbol = NULL;
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enum address_class theclass;
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SYMPY_REQUIRE_VALID (self, symbol);
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theclass = SYMBOL_CLASS (symbol);
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return PyBool_FromLong (!SYMBOL_IS_ARGUMENT (symbol)
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&& (theclass == LOC_LOCAL || theclass == LOC_REGISTER
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|| theclass == LOC_STATIC || theclass == LOC_COMPUTED
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|| theclass == LOC_OPTIMIZED_OUT));
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}
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/* Implementation of gdb.Symbol.needs_frame -> Boolean.
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Returns true iff the symbol needs a frame for evaluation. */
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static PyObject *
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sympy_needs_frame (PyObject *self, void *closure)
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{
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struct symbol *symbol = NULL;
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int result = 0;
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SYMPY_REQUIRE_VALID (self, symbol);
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TRY
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{
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result = symbol_read_needs_frame (symbol);
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}
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CATCH (except, RETURN_MASK_ALL)
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{
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GDB_PY_HANDLE_EXCEPTION (except);
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}
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END_CATCH
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if (result)
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Py_RETURN_TRUE;
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Py_RETURN_FALSE;
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}
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/* Implementation of gdb.Symbol.line -> int.
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Returns the line number at which the symbol was defined. */
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static PyObject *
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sympy_line (PyObject *self, void *closure)
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{
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struct symbol *symbol = NULL;
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SYMPY_REQUIRE_VALID (self, symbol);
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return PyInt_FromLong (SYMBOL_LINE (symbol));
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}
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/* Implementation of gdb.Symbol.is_valid (self) -> Boolean.
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Returns True if this Symbol still exists in GDB. */
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static PyObject *
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sympy_is_valid (PyObject *self, PyObject *args)
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{
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struct symbol *symbol = NULL;
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symbol = symbol_object_to_symbol (self);
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if (symbol == NULL)
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Py_RETURN_FALSE;
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Py_RETURN_TRUE;
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}
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/* Implementation of gdb.Symbol.value (self[, frame]) -> gdb.Value. Returns
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the value of the symbol, or an error in various circumstances. */
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static PyObject *
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sympy_value (PyObject *self, PyObject *args)
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{
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struct symbol *symbol = NULL;
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struct frame_info *frame_info = NULL;
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PyObject *frame_obj = NULL;
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struct value *value = NULL;
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if (!PyArg_ParseTuple (args, "|O", &frame_obj))
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return NULL;
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if (frame_obj != NULL && !PyObject_TypeCheck (frame_obj, &frame_object_type))
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{
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PyErr_SetString (PyExc_TypeError, "argument is not a frame");
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return NULL;
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}
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SYMPY_REQUIRE_VALID (self, symbol);
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if (SYMBOL_CLASS (symbol) == LOC_TYPEDEF)
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{
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PyErr_SetString (PyExc_TypeError, "cannot get the value of a typedef");
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return NULL;
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}
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TRY
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{
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if (frame_obj != NULL)
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{
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frame_info = frame_object_to_frame_info (frame_obj);
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if (frame_info == NULL)
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error (_("invalid frame"));
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}
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if (symbol_read_needs_frame (symbol) && frame_info == NULL)
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error (_("symbol requires a frame to compute its value"));
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/* TODO: currently, we have no way to recover the block in which SYMBOL
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was found, so we have no block to pass to read_var_value. This will
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yield an incorrect value when symbol is not local to FRAME_INFO (this
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can happen with nested functions). */
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value = read_var_value (symbol, NULL, frame_info);
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}
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CATCH (except, RETURN_MASK_ALL)
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{
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GDB_PY_HANDLE_EXCEPTION (except);
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}
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END_CATCH
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return value_to_value_object (value);
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}
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/* Given a symbol, and a symbol_object that has previously been
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allocated and initialized, populate the symbol_object with the
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struct symbol data. Also, register the symbol_object life-cycle
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with the life-cycle of the object file associated with this
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symbol, if needed. */
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static void
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set_symbol (symbol_object *obj, struct symbol *symbol)
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{
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obj->symbol = symbol;
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obj->prev = NULL;
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if (SYMBOL_OBJFILE_OWNED (symbol)
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&& symbol_symtab (symbol) != NULL)
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{
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struct objfile *objfile = symbol_objfile (symbol);
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obj->next = ((struct sympy_symbol_object *)
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objfile_data (objfile, sympy_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 (objfile, sympy_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 object (gdb.Symbol) that encapsulates the struct
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symbol object from GDB. */
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PyObject *
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symbol_to_symbol_object (struct symbol *sym)
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{
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symbol_object *sym_obj;
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sym_obj = PyObject_New (symbol_object, &symbol_object_type);
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if (sym_obj)
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set_symbol (sym_obj, sym);
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return (PyObject *) sym_obj;
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}
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/* Return the symbol that is wrapped by this symbol object. */
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struct symbol *
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symbol_object_to_symbol (PyObject *obj)
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{
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if (! PyObject_TypeCheck (obj, &symbol_object_type))
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return NULL;
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return ((symbol_object *) obj)->symbol;
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}
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static void
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sympy_dealloc (PyObject *obj)
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{
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symbol_object *sym_obj = (symbol_object *) obj;
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if (sym_obj->prev)
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sym_obj->prev->next = sym_obj->next;
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else if (sym_obj->symbol != NULL
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&& SYMBOL_OBJFILE_OWNED (sym_obj->symbol)
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&& symbol_symtab (sym_obj->symbol) != NULL)
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{
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set_objfile_data (symbol_objfile (sym_obj->symbol),
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sympy_objfile_data_key, sym_obj->next);
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}
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if (sym_obj->next)
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sym_obj->next->prev = sym_obj->prev;
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sym_obj->symbol = NULL;
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}
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/* Implementation of
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gdb.lookup_symbol (name [, block] [, domain]) -> (symbol, is_field_of_this)
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A tuple with 2 elements is always returned. The first is the symbol
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object or None, the second is a boolean with the value of
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is_a_field_of_this (see comment in lookup_symbol_in_language). */
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PyObject *
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gdbpy_lookup_symbol (PyObject *self, PyObject *args, PyObject *kw)
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{
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int domain = VAR_DOMAIN;
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struct field_of_this_result is_a_field_of_this;
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const char *name;
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static const char *keywords[] = { "name", "block", "domain", NULL };
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struct symbol *symbol = NULL;
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PyObject *block_obj = NULL, *sym_obj, *bool_obj;
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const struct block *block = NULL;
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if (!gdb_PyArg_ParseTupleAndKeywords (args, kw, "s|O!i", keywords, &name,
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&block_object_type, &block_obj,
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&domain))
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return NULL;
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if (block_obj)
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block = block_object_to_block (block_obj);
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else
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{
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struct frame_info *selected_frame;
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TRY
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{
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selected_frame = get_selected_frame (_("No frame selected."));
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block = get_frame_block (selected_frame, NULL);
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}
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CATCH (except, RETURN_MASK_ALL)
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{
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GDB_PY_HANDLE_EXCEPTION (except);
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}
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END_CATCH
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}
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TRY
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{
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symbol = lookup_symbol (name, block, (domain_enum) domain,
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&is_a_field_of_this).symbol;
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}
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CATCH (except, RETURN_MASK_ALL)
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{
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GDB_PY_HANDLE_EXCEPTION (except);
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}
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END_CATCH
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gdbpy_ref<> ret_tuple (PyTuple_New (2));
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if (ret_tuple == NULL)
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return NULL;
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if (symbol)
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{
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sym_obj = symbol_to_symbol_object (symbol);
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if (!sym_obj)
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return NULL;
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}
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else
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{
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sym_obj = Py_None;
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Py_INCREF (Py_None);
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}
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PyTuple_SET_ITEM (ret_tuple.get (), 0, sym_obj);
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bool_obj = (is_a_field_of_this.type != NULL) ? Py_True : Py_False;
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Py_INCREF (bool_obj);
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PyTuple_SET_ITEM (ret_tuple.get (), 1, bool_obj);
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return ret_tuple.release ();
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}
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/* Implementation of
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gdb.lookup_global_symbol (name [, domain]) -> symbol or None. */
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PyObject *
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gdbpy_lookup_global_symbol (PyObject *self, PyObject *args, PyObject *kw)
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{
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int domain = VAR_DOMAIN;
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const char *name;
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static const char *keywords[] = { "name", "domain", NULL };
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struct symbol *symbol = NULL;
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PyObject *sym_obj;
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if (!gdb_PyArg_ParseTupleAndKeywords (args, kw, "s|i", keywords, &name,
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&domain))
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return NULL;
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TRY
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{
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symbol = lookup_global_symbol (name, NULL, (domain_enum) domain).symbol;
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}
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CATCH (except, RETURN_MASK_ALL)
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{
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GDB_PY_HANDLE_EXCEPTION (except);
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}
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END_CATCH
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if (symbol)
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{
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sym_obj = symbol_to_symbol_object (symbol);
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if (!sym_obj)
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return NULL;
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}
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else
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{
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sym_obj = Py_None;
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Py_INCREF (Py_None);
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}
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return sym_obj;
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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 as further actions on the symbol would result
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in bad data. All access to obj->symbol should be gated by
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SYMPY_REQUIRE_VALID which will raise an exception on invalid
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symbols. */
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static void
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del_objfile_symbols (struct objfile *objfile, void *datum)
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{
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symbol_object *obj = (symbol_object *) datum;
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while (obj)
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{
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symbol_object *next = obj->next;
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obj->symbol = 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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int
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gdbpy_initialize_symbols (void)
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{
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if (PyType_Ready (&symbol_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 when an object file that is about to be
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deleted. */
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sympy_objfile_data_key
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= register_objfile_data_with_cleanup (NULL, del_objfile_symbols);
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if (PyModule_AddIntConstant (gdb_module, "SYMBOL_LOC_UNDEF", LOC_UNDEF) < 0
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|| PyModule_AddIntConstant (gdb_module, "SYMBOL_LOC_CONST",
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LOC_CONST) < 0
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|| PyModule_AddIntConstant (gdb_module, "SYMBOL_LOC_STATIC",
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LOC_STATIC) < 0
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|| PyModule_AddIntConstant (gdb_module, "SYMBOL_LOC_REGISTER",
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LOC_REGISTER) < 0
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||
|| PyModule_AddIntConstant (gdb_module, "SYMBOL_LOC_ARG",
|
||
LOC_ARG) < 0
|
||
|| PyModule_AddIntConstant (gdb_module, "SYMBOL_LOC_REF_ARG",
|
||
LOC_REF_ARG) < 0
|
||
|| PyModule_AddIntConstant (gdb_module, "SYMBOL_LOC_LOCAL",
|
||
LOC_LOCAL) < 0
|
||
|| PyModule_AddIntConstant (gdb_module, "SYMBOL_LOC_TYPEDEF",
|
||
LOC_TYPEDEF) < 0
|
||
|| PyModule_AddIntConstant (gdb_module, "SYMBOL_LOC_LABEL",
|
||
LOC_LABEL) < 0
|
||
|| PyModule_AddIntConstant (gdb_module, "SYMBOL_LOC_BLOCK",
|
||
LOC_BLOCK) < 0
|
||
|| PyModule_AddIntConstant (gdb_module, "SYMBOL_LOC_CONST_BYTES",
|
||
LOC_CONST_BYTES) < 0
|
||
|| PyModule_AddIntConstant (gdb_module, "SYMBOL_LOC_UNRESOLVED",
|
||
LOC_UNRESOLVED) < 0
|
||
|| PyModule_AddIntConstant (gdb_module, "SYMBOL_LOC_OPTIMIZED_OUT",
|
||
LOC_OPTIMIZED_OUT) < 0
|
||
|| PyModule_AddIntConstant (gdb_module, "SYMBOL_LOC_COMPUTED",
|
||
LOC_COMPUTED) < 0
|
||
|| PyModule_AddIntConstant (gdb_module, "SYMBOL_LOC_COMMON_BLOCK",
|
||
LOC_COMMON_BLOCK) < 0
|
||
|| PyModule_AddIntConstant (gdb_module, "SYMBOL_LOC_REGPARM_ADDR",
|
||
LOC_REGPARM_ADDR) < 0
|
||
|| PyModule_AddIntConstant (gdb_module, "SYMBOL_UNDEF_DOMAIN",
|
||
UNDEF_DOMAIN) < 0
|
||
|| PyModule_AddIntConstant (gdb_module, "SYMBOL_VAR_DOMAIN",
|
||
VAR_DOMAIN) < 0
|
||
|| PyModule_AddIntConstant (gdb_module, "SYMBOL_STRUCT_DOMAIN",
|
||
STRUCT_DOMAIN) < 0
|
||
|| PyModule_AddIntConstant (gdb_module, "SYMBOL_MODULE_DOMAIN",
|
||
MODULE_DOMAIN) < 0
|
||
|| PyModule_AddIntConstant (gdb_module, "SYMBOL_COMMON_BLOCK_DOMAIN",
|
||
COMMON_BLOCK_DOMAIN) < 0)
|
||
return -1;
|
||
|
||
/* These remain defined for compatibility, but as they were never
|
||
correct, they are no longer documented. Eventually we can remove
|
||
them. These exist because at one time, enum search_domain and
|
||
enum domain_enum_tag were combined -- but different values were
|
||
used differently. Here we try to give them values that will make
|
||
sense if they are passed to gdb.lookup_symbol. */
|
||
if (PyModule_AddIntConstant (gdb_module, "SYMBOL_VARIABLES_DOMAIN",
|
||
VAR_DOMAIN) < 0
|
||
|| PyModule_AddIntConstant (gdb_module, "SYMBOL_FUNCTIONS_DOMAIN",
|
||
VAR_DOMAIN) < 0
|
||
|| PyModule_AddIntConstant (gdb_module, "SYMBOL_TYPES_DOMAIN",
|
||
VAR_DOMAIN) < 0)
|
||
return -1;
|
||
|
||
return gdb_pymodule_addobject (gdb_module, "Symbol",
|
||
(PyObject *) &symbol_object_type);
|
||
}
|
||
|
||
|
||
|
||
static gdb_PyGetSetDef symbol_object_getset[] = {
|
||
{ "type", sympy_get_type, NULL,
|
||
"Type of the symbol.", NULL },
|
||
{ "symtab", sympy_get_symtab, NULL,
|
||
"Symbol table in which the symbol appears.", NULL },
|
||
{ "name", sympy_get_name, NULL,
|
||
"Name of the symbol, as it appears in the source code.", NULL },
|
||
{ "linkage_name", sympy_get_linkage_name, NULL,
|
||
"Name of the symbol, as used by the linker (i.e., may be mangled).",
|
||
NULL },
|
||
{ "print_name", sympy_get_print_name, NULL,
|
||
"Name of the symbol in a form suitable for output.\n\
|
||
This is either name or linkage_name, depending on whether the user asked GDB\n\
|
||
to display demangled or mangled names.", NULL },
|
||
{ "addr_class", sympy_get_addr_class, NULL, "Address class of the symbol." },
|
||
{ "is_argument", sympy_is_argument, NULL,
|
||
"True if the symbol is an argument of a function." },
|
||
{ "is_constant", sympy_is_constant, NULL,
|
||
"True if the symbol is a constant." },
|
||
{ "is_function", sympy_is_function, NULL,
|
||
"True if the symbol is a function or method." },
|
||
{ "is_variable", sympy_is_variable, NULL,
|
||
"True if the symbol is a variable." },
|
||
{ "needs_frame", sympy_needs_frame, NULL,
|
||
"True if the symbol requires a frame for evaluation." },
|
||
{ "line", sympy_line, NULL,
|
||
"The source line number at which the symbol was defined." },
|
||
{ NULL } /* Sentinel */
|
||
};
|
||
|
||
static PyMethodDef symbol_object_methods[] = {
|
||
{ "is_valid", sympy_is_valid, METH_NOARGS,
|
||
"is_valid () -> Boolean.\n\
|
||
Return true if this symbol is valid, false if not." },
|
||
{ "value", sympy_value, METH_VARARGS,
|
||
"value ([frame]) -> gdb.Value\n\
|
||
Return the value of the symbol." },
|
||
{NULL} /* Sentinel */
|
||
};
|
||
|
||
PyTypeObject symbol_object_type = {
|
||
PyVarObject_HEAD_INIT (NULL, 0)
|
||
"gdb.Symbol", /*tp_name*/
|
||
sizeof (symbol_object), /*tp_basicsize*/
|
||
0, /*tp_itemsize*/
|
||
sympy_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*/
|
||
sympy_str, /*tp_str*/
|
||
0, /*tp_getattro*/
|
||
0, /*tp_setattro*/
|
||
0, /*tp_as_buffer*/
|
||
Py_TPFLAGS_DEFAULT, /*tp_flags*/
|
||
"GDB symbol object", /*tp_doc */
|
||
0, /*tp_traverse */
|
||
0, /*tp_clear */
|
||
0, /*tp_richcompare */
|
||
0, /*tp_weaklistoffset */
|
||
0, /*tp_iter */
|
||
0, /*tp_iternext */
|
||
symbol_object_methods, /*tp_methods */
|
||
0, /*tp_members */
|
||
symbol_object_getset /*tp_getset */
|
||
};
|