1887 lines
47 KiB
C
1887 lines
47 KiB
C
/* Python interface to values.
|
||
|
||
Copyright (C) 2008-2016 Free Software Foundation, Inc.
|
||
|
||
This file is part of GDB.
|
||
|
||
This program is free software; you can redistribute it and/or modify
|
||
it under the terms of the GNU General Public License as published by
|
||
the Free Software Foundation; either version 3 of the License, or
|
||
(at your option) any later version.
|
||
|
||
This program is distributed in the hope that it will be useful,
|
||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
GNU General Public License for more details.
|
||
|
||
You should have received a copy of the GNU General Public License
|
||
along with this program. If not, see <http://www.gnu.org/licenses/>. */
|
||
|
||
#include "defs.h"
|
||
#include "charset.h"
|
||
#include "value.h"
|
||
#include "language.h"
|
||
#include "dfp.h"
|
||
#include "valprint.h"
|
||
#include "infcall.h"
|
||
#include "expression.h"
|
||
#include "cp-abi.h"
|
||
#include "python.h"
|
||
|
||
#include "python-internal.h"
|
||
|
||
/* Even though Python scalar types directly map to host types, we use
|
||
target types here to remain consistent with the values system in
|
||
GDB (which uses target arithmetic). */
|
||
|
||
/* Python's integer type corresponds to C's long type. */
|
||
#define builtin_type_pyint builtin_type (python_gdbarch)->builtin_long
|
||
|
||
/* Python's float type corresponds to C's double type. */
|
||
#define builtin_type_pyfloat builtin_type (python_gdbarch)->builtin_double
|
||
|
||
/* Python's long type corresponds to C's long long type. */
|
||
#define builtin_type_pylong builtin_type (python_gdbarch)->builtin_long_long
|
||
|
||
/* Python's long type corresponds to C's long long type. Unsigned version. */
|
||
#define builtin_type_upylong builtin_type \
|
||
(python_gdbarch)->builtin_unsigned_long_long
|
||
|
||
#define builtin_type_pybool \
|
||
language_bool_type (python_language, python_gdbarch)
|
||
|
||
#define builtin_type_pychar \
|
||
language_string_char_type (python_language, python_gdbarch)
|
||
|
||
typedef struct value_object {
|
||
PyObject_HEAD
|
||
struct value_object *next;
|
||
struct value_object *prev;
|
||
struct value *value;
|
||
PyObject *address;
|
||
PyObject *type;
|
||
PyObject *dynamic_type;
|
||
} value_object;
|
||
|
||
/* List of all values which are currently exposed to Python. It is
|
||
maintained so that when an objfile is discarded, preserve_values
|
||
can copy the values' types if needed. */
|
||
/* This variable is unnecessarily initialized to NULL in order to
|
||
work around a linker bug on MacOS. */
|
||
static value_object *values_in_python = NULL;
|
||
|
||
/* Called by the Python interpreter when deallocating a value object. */
|
||
static void
|
||
valpy_dealloc (PyObject *obj)
|
||
{
|
||
value_object *self = (value_object *) obj;
|
||
|
||
/* Remove SELF from the global list. */
|
||
if (self->prev)
|
||
self->prev->next = self->next;
|
||
else
|
||
{
|
||
gdb_assert (values_in_python == self);
|
||
values_in_python = self->next;
|
||
}
|
||
if (self->next)
|
||
self->next->prev = self->prev;
|
||
|
||
value_free (self->value);
|
||
|
||
if (self->address)
|
||
/* Use braces to appease gcc warning. *sigh* */
|
||
{
|
||
Py_DECREF (self->address);
|
||
}
|
||
|
||
if (self->type)
|
||
{
|
||
Py_DECREF (self->type);
|
||
}
|
||
|
||
Py_XDECREF (self->dynamic_type);
|
||
|
||
Py_TYPE (self)->tp_free (self);
|
||
}
|
||
|
||
/* Helper to push a Value object on the global list. */
|
||
static void
|
||
note_value (value_object *value_obj)
|
||
{
|
||
value_obj->next = values_in_python;
|
||
if (value_obj->next)
|
||
value_obj->next->prev = value_obj;
|
||
value_obj->prev = NULL;
|
||
values_in_python = value_obj;
|
||
}
|
||
|
||
/* Called when a new gdb.Value object needs to be allocated. Returns NULL on
|
||
error, with a python exception set. */
|
||
static PyObject *
|
||
valpy_new (PyTypeObject *subtype, PyObject *args, PyObject *keywords)
|
||
{
|
||
struct value *value = NULL; /* Initialize to appease gcc warning. */
|
||
value_object *value_obj;
|
||
|
||
if (PyTuple_Size (args) != 1)
|
||
{
|
||
PyErr_SetString (PyExc_TypeError, _("Value object creation takes only "
|
||
"1 argument"));
|
||
return NULL;
|
||
}
|
||
|
||
value_obj = (value_object *) subtype->tp_alloc (subtype, 1);
|
||
if (value_obj == NULL)
|
||
{
|
||
PyErr_SetString (PyExc_MemoryError, _("Could not allocate memory to "
|
||
"create Value object."));
|
||
return NULL;
|
||
}
|
||
|
||
value = convert_value_from_python (PyTuple_GetItem (args, 0));
|
||
if (value == NULL)
|
||
{
|
||
subtype->tp_free (value_obj);
|
||
return NULL;
|
||
}
|
||
|
||
value_obj->value = value;
|
||
release_value_or_incref (value);
|
||
value_obj->address = NULL;
|
||
value_obj->type = NULL;
|
||
value_obj->dynamic_type = NULL;
|
||
note_value (value_obj);
|
||
|
||
return (PyObject *) value_obj;
|
||
}
|
||
|
||
/* Iterate over all the Value objects, calling preserve_one_value on
|
||
each. */
|
||
void
|
||
gdbpy_preserve_values (const struct extension_language_defn *extlang,
|
||
struct objfile *objfile, htab_t copied_types)
|
||
{
|
||
value_object *iter;
|
||
|
||
for (iter = values_in_python; iter; iter = iter->next)
|
||
preserve_one_value (iter->value, objfile, copied_types);
|
||
}
|
||
|
||
/* Given a value of a pointer type, apply the C unary * operator to it. */
|
||
static PyObject *
|
||
valpy_dereference (PyObject *self, PyObject *args)
|
||
{
|
||
PyObject *result = NULL;
|
||
|
||
TRY
|
||
{
|
||
struct value *res_val;
|
||
struct cleanup *cleanup = make_cleanup_value_free_to_mark (value_mark ());
|
||
|
||
res_val = value_ind (((value_object *) self)->value);
|
||
result = value_to_value_object (res_val);
|
||
do_cleanups (cleanup);
|
||
}
|
||
CATCH (except, RETURN_MASK_ALL)
|
||
{
|
||
GDB_PY_HANDLE_EXCEPTION (except);
|
||
}
|
||
END_CATCH
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Given a value of a pointer type or a reference type, return the value
|
||
referenced. The difference between this function and valpy_dereference is
|
||
that the latter applies * unary operator to a value, which need not always
|
||
result in the value referenced. For example, for a value which is a reference
|
||
to an 'int' pointer ('int *'), valpy_dereference will result in a value of
|
||
type 'int' while valpy_referenced_value will result in a value of type
|
||
'int *'. */
|
||
|
||
static PyObject *
|
||
valpy_referenced_value (PyObject *self, PyObject *args)
|
||
{
|
||
PyObject *result = NULL;
|
||
|
||
TRY
|
||
{
|
||
struct value *self_val, *res_val;
|
||
struct cleanup *cleanup = make_cleanup_value_free_to_mark (value_mark ());
|
||
|
||
self_val = ((value_object *) self)->value;
|
||
switch (TYPE_CODE (check_typedef (value_type (self_val))))
|
||
{
|
||
case TYPE_CODE_PTR:
|
||
res_val = value_ind (self_val);
|
||
break;
|
||
case TYPE_CODE_REF:
|
||
res_val = coerce_ref (self_val);
|
||
break;
|
||
default:
|
||
error(_("Trying to get the referenced value from a value which is "
|
||
"neither a pointer nor a reference."));
|
||
}
|
||
|
||
result = value_to_value_object (res_val);
|
||
do_cleanups (cleanup);
|
||
}
|
||
CATCH (except, RETURN_MASK_ALL)
|
||
{
|
||
GDB_PY_HANDLE_EXCEPTION (except);
|
||
}
|
||
END_CATCH
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Return a value which is a reference to the value. */
|
||
|
||
static PyObject *
|
||
valpy_reference_value (PyObject *self, PyObject *args)
|
||
{
|
||
PyObject *result = NULL;
|
||
|
||
TRY
|
||
{
|
||
struct value *self_val;
|
||
struct cleanup *cleanup = make_cleanup_value_free_to_mark (value_mark ());
|
||
|
||
self_val = ((value_object *) self)->value;
|
||
result = value_to_value_object (value_ref (self_val));
|
||
|
||
do_cleanups (cleanup);
|
||
}
|
||
CATCH (except, RETURN_MASK_ALL)
|
||
{
|
||
GDB_PY_HANDLE_EXCEPTION (except);
|
||
}
|
||
END_CATCH
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Return a "const" qualified version of the value. */
|
||
|
||
static PyObject *
|
||
valpy_const_value (PyObject *self, PyObject *args)
|
||
{
|
||
PyObject *result = NULL;
|
||
|
||
TRY
|
||
{
|
||
struct value *self_val, *res_val;
|
||
struct cleanup *cleanup = make_cleanup_value_free_to_mark (value_mark ());
|
||
|
||
self_val = ((value_object *) self)->value;
|
||
res_val = make_cv_value (1, 0, self_val);
|
||
result = value_to_value_object (res_val);
|
||
|
||
do_cleanups (cleanup);
|
||
}
|
||
CATCH (except, RETURN_MASK_ALL)
|
||
{
|
||
GDB_PY_HANDLE_EXCEPTION (except);
|
||
}
|
||
END_CATCH
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Return "&value". */
|
||
static PyObject *
|
||
valpy_get_address (PyObject *self, void *closure)
|
||
{
|
||
value_object *val_obj = (value_object *) self;
|
||
|
||
if (!val_obj->address)
|
||
{
|
||
TRY
|
||
{
|
||
struct value *res_val;
|
||
struct cleanup *cleanup
|
||
= make_cleanup_value_free_to_mark (value_mark ());
|
||
|
||
res_val = value_addr (val_obj->value);
|
||
val_obj->address = value_to_value_object (res_val);
|
||
do_cleanups (cleanup);
|
||
}
|
||
CATCH (except, RETURN_MASK_ALL)
|
||
{
|
||
val_obj->address = Py_None;
|
||
Py_INCREF (Py_None);
|
||
}
|
||
END_CATCH
|
||
}
|
||
|
||
Py_XINCREF (val_obj->address);
|
||
|
||
return val_obj->address;
|
||
}
|
||
|
||
/* Return type of the value. */
|
||
static PyObject *
|
||
valpy_get_type (PyObject *self, void *closure)
|
||
{
|
||
value_object *obj = (value_object *) self;
|
||
|
||
if (!obj->type)
|
||
{
|
||
obj->type = type_to_type_object (value_type (obj->value));
|
||
if (!obj->type)
|
||
return NULL;
|
||
}
|
||
Py_INCREF (obj->type);
|
||
return obj->type;
|
||
}
|
||
|
||
/* Return dynamic type of the value. */
|
||
|
||
static PyObject *
|
||
valpy_get_dynamic_type (PyObject *self, void *closure)
|
||
{
|
||
value_object *obj = (value_object *) self;
|
||
struct type *type = NULL;
|
||
|
||
if (obj->dynamic_type != NULL)
|
||
{
|
||
Py_INCREF (obj->dynamic_type);
|
||
return obj->dynamic_type;
|
||
}
|
||
|
||
TRY
|
||
{
|
||
struct value *val = obj->value;
|
||
struct cleanup *cleanup = make_cleanup_value_free_to_mark (value_mark ());
|
||
|
||
type = value_type (val);
|
||
type = check_typedef (type);
|
||
|
||
if (((TYPE_CODE (type) == TYPE_CODE_PTR)
|
||
|| (TYPE_CODE (type) == TYPE_CODE_REF))
|
||
&& (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_STRUCT))
|
||
{
|
||
struct value *target;
|
||
int was_pointer = TYPE_CODE (type) == TYPE_CODE_PTR;
|
||
|
||
if (was_pointer)
|
||
target = value_ind (val);
|
||
else
|
||
target = coerce_ref (val);
|
||
type = value_rtti_type (target, NULL, NULL, NULL);
|
||
|
||
if (type)
|
||
{
|
||
if (was_pointer)
|
||
type = lookup_pointer_type (type);
|
||
else
|
||
type = lookup_reference_type (type);
|
||
}
|
||
}
|
||
else if (TYPE_CODE (type) == TYPE_CODE_STRUCT)
|
||
type = value_rtti_type (val, NULL, NULL, NULL);
|
||
else
|
||
{
|
||
/* Re-use object's static type. */
|
||
type = NULL;
|
||
}
|
||
|
||
do_cleanups (cleanup);
|
||
}
|
||
CATCH (except, RETURN_MASK_ALL)
|
||
{
|
||
GDB_PY_HANDLE_EXCEPTION (except);
|
||
}
|
||
END_CATCH
|
||
|
||
if (type == NULL)
|
||
obj->dynamic_type = valpy_get_type (self, NULL);
|
||
else
|
||
obj->dynamic_type = type_to_type_object (type);
|
||
|
||
Py_XINCREF (obj->dynamic_type);
|
||
return obj->dynamic_type;
|
||
}
|
||
|
||
/* Implementation of gdb.Value.lazy_string ([encoding] [, length]) ->
|
||
string. Return a PyObject representing a lazy_string_object type.
|
||
A lazy string is a pointer to a string with an optional encoding and
|
||
length. If ENCODING is not given, encoding is set to None. If an
|
||
ENCODING is provided the encoding parameter is set to ENCODING, but
|
||
the string is not encoded. If LENGTH is provided then the length
|
||
parameter is set to LENGTH, otherwise length will be set to -1 (first
|
||
null of appropriate with). */
|
||
static PyObject *
|
||
valpy_lazy_string (PyObject *self, PyObject *args, PyObject *kw)
|
||
{
|
||
gdb_py_longest length = -1;
|
||
struct value *value = ((value_object *) self)->value;
|
||
const char *user_encoding = NULL;
|
||
static char *keywords[] = { "encoding", "length", NULL };
|
||
PyObject *str_obj = NULL;
|
||
|
||
if (!PyArg_ParseTupleAndKeywords (args, kw, "|s" GDB_PY_LL_ARG, keywords,
|
||
&user_encoding, &length))
|
||
return NULL;
|
||
|
||
TRY
|
||
{
|
||
struct cleanup *cleanup = make_cleanup_value_free_to_mark (value_mark ());
|
||
|
||
if (TYPE_CODE (value_type (value)) == TYPE_CODE_PTR)
|
||
value = value_ind (value);
|
||
|
||
str_obj = gdbpy_create_lazy_string_object (value_address (value), length,
|
||
user_encoding,
|
||
value_type (value));
|
||
|
||
do_cleanups (cleanup);
|
||
}
|
||
CATCH (except, RETURN_MASK_ALL)
|
||
{
|
||
GDB_PY_HANDLE_EXCEPTION (except);
|
||
}
|
||
END_CATCH
|
||
|
||
return str_obj;
|
||
}
|
||
|
||
/* Implementation of gdb.Value.string ([encoding] [, errors]
|
||
[, length]) -> string. Return Unicode string with value contents.
|
||
If ENCODING is not given, the string is assumed to be encoded in
|
||
the target's charset. If LENGTH is provided, only fetch string to
|
||
the length provided. */
|
||
|
||
static PyObject *
|
||
valpy_string (PyObject *self, PyObject *args, PyObject *kw)
|
||
{
|
||
int length = -1;
|
||
gdb_byte *buffer;
|
||
struct value *value = ((value_object *) self)->value;
|
||
PyObject *unicode;
|
||
const char *encoding = NULL;
|
||
const char *errors = NULL;
|
||
const char *user_encoding = NULL;
|
||
const char *la_encoding = NULL;
|
||
struct type *char_type;
|
||
static char *keywords[] = { "encoding", "errors", "length", NULL };
|
||
|
||
if (!PyArg_ParseTupleAndKeywords (args, kw, "|ssi", keywords,
|
||
&user_encoding, &errors, &length))
|
||
return NULL;
|
||
|
||
TRY
|
||
{
|
||
LA_GET_STRING (value, &buffer, &length, &char_type, &la_encoding);
|
||
}
|
||
CATCH (except, RETURN_MASK_ALL)
|
||
{
|
||
GDB_PY_HANDLE_EXCEPTION (except);
|
||
}
|
||
END_CATCH
|
||
|
||
encoding = (user_encoding && *user_encoding) ? user_encoding : la_encoding;
|
||
unicode = PyUnicode_Decode ((const char *) buffer,
|
||
length * TYPE_LENGTH (char_type),
|
||
encoding, errors);
|
||
xfree (buffer);
|
||
|
||
return unicode;
|
||
}
|
||
|
||
/* A helper function that implements the various cast operators. */
|
||
|
||
static PyObject *
|
||
valpy_do_cast (PyObject *self, PyObject *args, enum exp_opcode op)
|
||
{
|
||
PyObject *type_obj, *result = NULL;
|
||
struct type *type;
|
||
|
||
if (! PyArg_ParseTuple (args, "O", &type_obj))
|
||
return NULL;
|
||
|
||
type = type_object_to_type (type_obj);
|
||
if (! type)
|
||
{
|
||
PyErr_SetString (PyExc_RuntimeError,
|
||
_("Argument must be a type."));
|
||
return NULL;
|
||
}
|
||
|
||
TRY
|
||
{
|
||
struct value *val = ((value_object *) self)->value;
|
||
struct value *res_val;
|
||
struct cleanup *cleanup = make_cleanup_value_free_to_mark (value_mark ());
|
||
|
||
if (op == UNOP_DYNAMIC_CAST)
|
||
res_val = value_dynamic_cast (type, val);
|
||
else if (op == UNOP_REINTERPRET_CAST)
|
||
res_val = value_reinterpret_cast (type, val);
|
||
else
|
||
{
|
||
gdb_assert (op == UNOP_CAST);
|
||
res_val = value_cast (type, val);
|
||
}
|
||
|
||
result = value_to_value_object (res_val);
|
||
do_cleanups (cleanup);
|
||
}
|
||
CATCH (except, RETURN_MASK_ALL)
|
||
{
|
||
GDB_PY_HANDLE_EXCEPTION (except);
|
||
}
|
||
END_CATCH
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Implementation of the "cast" method. */
|
||
|
||
static PyObject *
|
||
valpy_cast (PyObject *self, PyObject *args)
|
||
{
|
||
return valpy_do_cast (self, args, UNOP_CAST);
|
||
}
|
||
|
||
/* Implementation of the "dynamic_cast" method. */
|
||
|
||
static PyObject *
|
||
valpy_dynamic_cast (PyObject *self, PyObject *args)
|
||
{
|
||
return valpy_do_cast (self, args, UNOP_DYNAMIC_CAST);
|
||
}
|
||
|
||
/* Implementation of the "reinterpret_cast" method. */
|
||
|
||
static PyObject *
|
||
valpy_reinterpret_cast (PyObject *self, PyObject *args)
|
||
{
|
||
return valpy_do_cast (self, args, UNOP_REINTERPRET_CAST);
|
||
}
|
||
|
||
static Py_ssize_t
|
||
valpy_length (PyObject *self)
|
||
{
|
||
/* We don't support getting the number of elements in a struct / class. */
|
||
PyErr_SetString (PyExc_NotImplementedError,
|
||
_("Invalid operation on gdb.Value."));
|
||
return -1;
|
||
}
|
||
|
||
/* Return 1 if the gdb.Field object FIELD is present in the value V.
|
||
Returns 0 otherwise. If any Python error occurs, -1 is returned. */
|
||
|
||
static int
|
||
value_has_field (struct value *v, PyObject *field)
|
||
{
|
||
struct type *parent_type, *val_type;
|
||
enum type_code type_code;
|
||
PyObject *type_object = PyObject_GetAttrString (field, "parent_type");
|
||
int has_field = 0;
|
||
|
||
if (type_object == NULL)
|
||
return -1;
|
||
|
||
parent_type = type_object_to_type (type_object);
|
||
Py_DECREF (type_object);
|
||
if (parent_type == NULL)
|
||
{
|
||
PyErr_SetString (PyExc_TypeError,
|
||
_("'parent_type' attribute of gdb.Field object is not a"
|
||
"gdb.Type object."));
|
||
return -1;
|
||
}
|
||
|
||
TRY
|
||
{
|
||
val_type = value_type (v);
|
||
val_type = check_typedef (val_type);
|
||
if (TYPE_CODE (val_type) == TYPE_CODE_REF
|
||
|| TYPE_CODE (val_type) == TYPE_CODE_PTR)
|
||
val_type = check_typedef (TYPE_TARGET_TYPE (val_type));
|
||
|
||
type_code = TYPE_CODE (val_type);
|
||
if ((type_code == TYPE_CODE_STRUCT || type_code == TYPE_CODE_UNION)
|
||
&& types_equal (val_type, parent_type))
|
||
has_field = 1;
|
||
else
|
||
has_field = 0;
|
||
}
|
||
CATCH (except, RETURN_MASK_ALL)
|
||
{
|
||
GDB_PY_SET_HANDLE_EXCEPTION (except);
|
||
}
|
||
END_CATCH
|
||
|
||
return has_field;
|
||
}
|
||
|
||
/* Return the value of a flag FLAG_NAME in a gdb.Field object FIELD.
|
||
Returns 1 if the flag value is true, 0 if it is false, and -1 if
|
||
a Python error occurs. */
|
||
|
||
static int
|
||
get_field_flag (PyObject *field, const char *flag_name)
|
||
{
|
||
int flag_value;
|
||
PyObject *flag_object = PyObject_GetAttrString (field, flag_name);
|
||
|
||
if (flag_object == NULL)
|
||
return -1;
|
||
|
||
flag_value = PyObject_IsTrue (flag_object);
|
||
Py_DECREF (flag_object);
|
||
|
||
return flag_value;
|
||
}
|
||
|
||
/* Return the "type" attribute of a gdb.Field object.
|
||
Returns NULL on error, with a Python exception set. */
|
||
|
||
static struct type *
|
||
get_field_type (PyObject *field)
|
||
{
|
||
PyObject *ftype_obj = PyObject_GetAttrString (field, "type");
|
||
struct type *ftype;
|
||
|
||
if (ftype_obj == NULL)
|
||
return NULL;
|
||
ftype = type_object_to_type (ftype_obj);
|
||
Py_DECREF (ftype_obj);
|
||
if (ftype == NULL)
|
||
PyErr_SetString (PyExc_TypeError,
|
||
_("'type' attribute of gdb.Field object is not a "
|
||
"gdb.Type object."));
|
||
|
||
return ftype;
|
||
}
|
||
|
||
/* Given string name or a gdb.Field object corresponding to an element inside
|
||
a structure, return its value object. Returns NULL on error, with a python
|
||
exception set. */
|
||
|
||
static PyObject *
|
||
valpy_getitem (PyObject *self, PyObject *key)
|
||
{
|
||
struct gdb_exception except = exception_none;
|
||
value_object *self_value = (value_object *) self;
|
||
char *field = NULL;
|
||
struct type *base_class_type = NULL, *field_type = NULL;
|
||
long bitpos = -1;
|
||
PyObject *result = NULL;
|
||
|
||
if (gdbpy_is_string (key))
|
||
{
|
||
field = python_string_to_host_string (key);
|
||
if (field == NULL)
|
||
return NULL;
|
||
}
|
||
else if (gdbpy_is_field (key))
|
||
{
|
||
int is_base_class, valid_field;
|
||
|
||
valid_field = value_has_field (self_value->value, key);
|
||
if (valid_field < 0)
|
||
return NULL;
|
||
else if (valid_field == 0)
|
||
{
|
||
PyErr_SetString (PyExc_TypeError,
|
||
_("Invalid lookup for a field not contained in "
|
||
"the value."));
|
||
|
||
return NULL;
|
||
}
|
||
|
||
is_base_class = get_field_flag (key, "is_base_class");
|
||
if (is_base_class < 0)
|
||
return NULL;
|
||
else if (is_base_class > 0)
|
||
{
|
||
base_class_type = get_field_type (key);
|
||
if (base_class_type == NULL)
|
||
return NULL;
|
||
}
|
||
else
|
||
{
|
||
PyObject *name_obj = PyObject_GetAttrString (key, "name");
|
||
|
||
if (name_obj == NULL)
|
||
return NULL;
|
||
|
||
if (name_obj != Py_None)
|
||
{
|
||
field = python_string_to_host_string (name_obj);
|
||
Py_DECREF (name_obj);
|
||
if (field == NULL)
|
||
return NULL;
|
||
}
|
||
else
|
||
{
|
||
PyObject *bitpos_obj;
|
||
int valid;
|
||
|
||
Py_DECREF (name_obj);
|
||
|
||
if (!PyObject_HasAttrString (key, "bitpos"))
|
||
{
|
||
PyErr_SetString (PyExc_AttributeError,
|
||
_("gdb.Field object has no name and no "
|
||
"'bitpos' attribute."));
|
||
|
||
return NULL;
|
||
}
|
||
bitpos_obj = PyObject_GetAttrString (key, "bitpos");
|
||
if (bitpos_obj == NULL)
|
||
return NULL;
|
||
valid = gdb_py_int_as_long (bitpos_obj, &bitpos);
|
||
Py_DECREF (bitpos_obj);
|
||
if (!valid)
|
||
return NULL;
|
||
|
||
field_type = get_field_type (key);
|
||
if (field_type == NULL)
|
||
return NULL;
|
||
}
|
||
}
|
||
}
|
||
|
||
TRY
|
||
{
|
||
struct value *tmp = self_value->value;
|
||
struct cleanup *cleanup = make_cleanup_value_free_to_mark (value_mark ());
|
||
struct value *res_val = NULL;
|
||
|
||
if (field)
|
||
res_val = value_struct_elt (&tmp, NULL, field, 0, NULL);
|
||
else if (bitpos >= 0)
|
||
res_val = value_struct_elt_bitpos (&tmp, bitpos, field_type,
|
||
"struct/class/union");
|
||
else if (base_class_type != NULL)
|
||
{
|
||
struct type *val_type;
|
||
|
||
val_type = check_typedef (value_type (tmp));
|
||
if (TYPE_CODE (val_type) == TYPE_CODE_PTR)
|
||
res_val = value_cast (lookup_pointer_type (base_class_type), tmp);
|
||
else if (TYPE_CODE (val_type) == TYPE_CODE_REF)
|
||
res_val = value_cast (lookup_reference_type (base_class_type), tmp);
|
||
else
|
||
res_val = value_cast (base_class_type, tmp);
|
||
}
|
||
else
|
||
{
|
||
/* Assume we are attempting an array access, and let the
|
||
value code throw an exception if the index has an invalid
|
||
type. */
|
||
struct value *idx = convert_value_from_python (key);
|
||
|
||
if (idx != NULL)
|
||
{
|
||
/* Check the value's type is something that can be accessed via
|
||
a subscript. */
|
||
struct type *type;
|
||
|
||
tmp = coerce_ref (tmp);
|
||
type = check_typedef (value_type (tmp));
|
||
if (TYPE_CODE (type) != TYPE_CODE_ARRAY
|
||
&& TYPE_CODE (type) != TYPE_CODE_PTR)
|
||
error (_("Cannot subscript requested type."));
|
||
else
|
||
res_val = value_subscript (tmp, value_as_long (idx));
|
||
}
|
||
}
|
||
|
||
if (res_val)
|
||
result = value_to_value_object (res_val);
|
||
do_cleanups (cleanup);
|
||
}
|
||
CATCH (ex, RETURN_MASK_ALL)
|
||
{
|
||
except = ex;
|
||
}
|
||
END_CATCH
|
||
|
||
xfree (field);
|
||
GDB_PY_HANDLE_EXCEPTION (except);
|
||
|
||
return result;
|
||
}
|
||
|
||
static int
|
||
valpy_setitem (PyObject *self, PyObject *key, PyObject *value)
|
||
{
|
||
PyErr_Format (PyExc_NotImplementedError,
|
||
_("Setting of struct elements is not currently supported."));
|
||
return -1;
|
||
}
|
||
|
||
/* Called by the Python interpreter to perform an inferior function
|
||
call on the value. Returns NULL on error, with a python exception set. */
|
||
static PyObject *
|
||
valpy_call (PyObject *self, PyObject *args, PyObject *keywords)
|
||
{
|
||
Py_ssize_t args_count;
|
||
struct value *function = ((value_object *) self)->value;
|
||
struct value **vargs = NULL;
|
||
struct type *ftype = NULL;
|
||
struct value *mark = value_mark ();
|
||
PyObject *result = NULL;
|
||
|
||
TRY
|
||
{
|
||
ftype = check_typedef (value_type (function));
|
||
}
|
||
CATCH (except, RETURN_MASK_ALL)
|
||
{
|
||
GDB_PY_HANDLE_EXCEPTION (except);
|
||
}
|
||
END_CATCH
|
||
|
||
if (TYPE_CODE (ftype) != TYPE_CODE_FUNC)
|
||
{
|
||
PyErr_SetString (PyExc_RuntimeError,
|
||
_("Value is not callable (not TYPE_CODE_FUNC)."));
|
||
return NULL;
|
||
}
|
||
|
||
if (! PyTuple_Check (args))
|
||
{
|
||
PyErr_SetString (PyExc_TypeError,
|
||
_("Inferior arguments must be provided in a tuple."));
|
||
return NULL;
|
||
}
|
||
|
||
args_count = PyTuple_Size (args);
|
||
if (args_count > 0)
|
||
{
|
||
int i;
|
||
|
||
vargs = XALLOCAVEC (struct value *, args_count);
|
||
for (i = 0; i < args_count; i++)
|
||
{
|
||
PyObject *item = PyTuple_GetItem (args, i);
|
||
|
||
if (item == NULL)
|
||
return NULL;
|
||
|
||
vargs[i] = convert_value_from_python (item);
|
||
if (vargs[i] == NULL)
|
||
return NULL;
|
||
}
|
||
}
|
||
|
||
TRY
|
||
{
|
||
struct cleanup *cleanup = make_cleanup_value_free_to_mark (mark);
|
||
struct value *return_value;
|
||
|
||
return_value = call_function_by_hand (function, args_count, vargs);
|
||
result = value_to_value_object (return_value);
|
||
do_cleanups (cleanup);
|
||
}
|
||
CATCH (except, RETURN_MASK_ALL)
|
||
{
|
||
GDB_PY_HANDLE_EXCEPTION (except);
|
||
}
|
||
END_CATCH
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Called by the Python interpreter to obtain string representation
|
||
of the object. */
|
||
static PyObject *
|
||
valpy_str (PyObject *self)
|
||
{
|
||
char *s = NULL;
|
||
PyObject *result;
|
||
struct value_print_options opts;
|
||
|
||
get_user_print_options (&opts);
|
||
opts.deref_ref = 0;
|
||
|
||
TRY
|
||
{
|
||
struct ui_file *stb = mem_fileopen ();
|
||
struct cleanup *old_chain = make_cleanup_ui_file_delete (stb);
|
||
|
||
common_val_print (((value_object *) self)->value, stb, 0,
|
||
&opts, python_language);
|
||
s = ui_file_xstrdup (stb, NULL);
|
||
|
||
do_cleanups (old_chain);
|
||
}
|
||
CATCH (except, RETURN_MASK_ALL)
|
||
{
|
||
GDB_PY_HANDLE_EXCEPTION (except);
|
||
}
|
||
END_CATCH
|
||
|
||
result = PyUnicode_Decode (s, strlen (s), host_charset (), NULL);
|
||
xfree (s);
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Implements gdb.Value.is_optimized_out. */
|
||
static PyObject *
|
||
valpy_get_is_optimized_out (PyObject *self, void *closure)
|
||
{
|
||
struct value *value = ((value_object *) self)->value;
|
||
int opt = 0;
|
||
|
||
TRY
|
||
{
|
||
opt = value_optimized_out (value);
|
||
}
|
||
CATCH (except, RETURN_MASK_ALL)
|
||
{
|
||
GDB_PY_HANDLE_EXCEPTION (except);
|
||
}
|
||
END_CATCH
|
||
|
||
if (opt)
|
||
Py_RETURN_TRUE;
|
||
|
||
Py_RETURN_FALSE;
|
||
}
|
||
|
||
/* Implements gdb.Value.is_lazy. */
|
||
static PyObject *
|
||
valpy_get_is_lazy (PyObject *self, void *closure)
|
||
{
|
||
struct value *value = ((value_object *) self)->value;
|
||
int opt = 0;
|
||
|
||
TRY
|
||
{
|
||
opt = value_lazy (value);
|
||
}
|
||
CATCH (except, RETURN_MASK_ALL)
|
||
{
|
||
GDB_PY_HANDLE_EXCEPTION (except);
|
||
}
|
||
END_CATCH
|
||
|
||
if (opt)
|
||
Py_RETURN_TRUE;
|
||
|
||
Py_RETURN_FALSE;
|
||
}
|
||
|
||
/* Implements gdb.Value.fetch_lazy (). */
|
||
static PyObject *
|
||
valpy_fetch_lazy (PyObject *self, PyObject *args)
|
||
{
|
||
struct value *value = ((value_object *) self)->value;
|
||
|
||
TRY
|
||
{
|
||
if (value_lazy (value))
|
||
value_fetch_lazy (value);
|
||
}
|
||
CATCH (except, RETURN_MASK_ALL)
|
||
{
|
||
GDB_PY_HANDLE_EXCEPTION (except);
|
||
}
|
||
END_CATCH
|
||
|
||
Py_RETURN_NONE;
|
||
}
|
||
|
||
/* Calculate and return the address of the PyObject as the value of
|
||
the builtin __hash__ call. */
|
||
static Py_hash_t
|
||
valpy_hash (PyObject *self)
|
||
{
|
||
return (intptr_t) self;
|
||
}
|
||
|
||
enum valpy_opcode
|
||
{
|
||
VALPY_ADD,
|
||
VALPY_SUB,
|
||
VALPY_MUL,
|
||
VALPY_DIV,
|
||
VALPY_REM,
|
||
VALPY_POW,
|
||
VALPY_LSH,
|
||
VALPY_RSH,
|
||
VALPY_BITAND,
|
||
VALPY_BITOR,
|
||
VALPY_BITXOR
|
||
};
|
||
|
||
/* If TYPE is a reference, return the target; otherwise return TYPE. */
|
||
#define STRIP_REFERENCE(TYPE) \
|
||
((TYPE_CODE (TYPE) == TYPE_CODE_REF) ? (TYPE_TARGET_TYPE (TYPE)) : (TYPE))
|
||
|
||
/* Helper for valpy_binop. Returns a value object which is the result
|
||
of applying the operation specified by OPCODE to the given
|
||
arguments. Throws a GDB exception on error. */
|
||
|
||
static PyObject *
|
||
valpy_binop_throw (enum valpy_opcode opcode, PyObject *self, PyObject *other)
|
||
{
|
||
PyObject *result = NULL;
|
||
|
||
struct value *arg1, *arg2;
|
||
struct cleanup *cleanup = make_cleanup_value_free_to_mark (value_mark ());
|
||
struct value *res_val = NULL;
|
||
enum exp_opcode op = OP_NULL;
|
||
int handled = 0;
|
||
|
||
/* If the gdb.Value object is the second operand, then it will be
|
||
passed to us as the OTHER argument, and SELF will be an entirely
|
||
different kind of object, altogether. Because of this, we can't
|
||
assume self is a gdb.Value object and need to convert it from
|
||
python as well. */
|
||
arg1 = convert_value_from_python (self);
|
||
if (arg1 == NULL)
|
||
{
|
||
do_cleanups (cleanup);
|
||
return NULL;
|
||
}
|
||
|
||
arg2 = convert_value_from_python (other);
|
||
if (arg2 == NULL)
|
||
{
|
||
do_cleanups (cleanup);
|
||
return NULL;
|
||
}
|
||
|
||
switch (opcode)
|
||
{
|
||
case VALPY_ADD:
|
||
{
|
||
struct type *ltype = value_type (arg1);
|
||
struct type *rtype = value_type (arg2);
|
||
|
||
ltype = check_typedef (ltype);
|
||
ltype = STRIP_REFERENCE (ltype);
|
||
rtype = check_typedef (rtype);
|
||
rtype = STRIP_REFERENCE (rtype);
|
||
|
||
handled = 1;
|
||
if (TYPE_CODE (ltype) == TYPE_CODE_PTR
|
||
&& is_integral_type (rtype))
|
||
res_val = value_ptradd (arg1, value_as_long (arg2));
|
||
else if (TYPE_CODE (rtype) == TYPE_CODE_PTR
|
||
&& is_integral_type (ltype))
|
||
res_val = value_ptradd (arg2, value_as_long (arg1));
|
||
else
|
||
{
|
||
handled = 0;
|
||
op = BINOP_ADD;
|
||
}
|
||
}
|
||
break;
|
||
case VALPY_SUB:
|
||
{
|
||
struct type *ltype = value_type (arg1);
|
||
struct type *rtype = value_type (arg2);
|
||
|
||
ltype = check_typedef (ltype);
|
||
ltype = STRIP_REFERENCE (ltype);
|
||
rtype = check_typedef (rtype);
|
||
rtype = STRIP_REFERENCE (rtype);
|
||
|
||
handled = 1;
|
||
if (TYPE_CODE (ltype) == TYPE_CODE_PTR
|
||
&& TYPE_CODE (rtype) == TYPE_CODE_PTR)
|
||
/* A ptrdiff_t for the target would be preferable here. */
|
||
res_val = value_from_longest (builtin_type_pyint,
|
||
value_ptrdiff (arg1, arg2));
|
||
else if (TYPE_CODE (ltype) == TYPE_CODE_PTR
|
||
&& is_integral_type (rtype))
|
||
res_val = value_ptradd (arg1, - value_as_long (arg2));
|
||
else
|
||
{
|
||
handled = 0;
|
||
op = BINOP_SUB;
|
||
}
|
||
}
|
||
break;
|
||
case VALPY_MUL:
|
||
op = BINOP_MUL;
|
||
break;
|
||
case VALPY_DIV:
|
||
op = BINOP_DIV;
|
||
break;
|
||
case VALPY_REM:
|
||
op = BINOP_REM;
|
||
break;
|
||
case VALPY_POW:
|
||
op = BINOP_EXP;
|
||
break;
|
||
case VALPY_LSH:
|
||
op = BINOP_LSH;
|
||
break;
|
||
case VALPY_RSH:
|
||
op = BINOP_RSH;
|
||
break;
|
||
case VALPY_BITAND:
|
||
op = BINOP_BITWISE_AND;
|
||
break;
|
||
case VALPY_BITOR:
|
||
op = BINOP_BITWISE_IOR;
|
||
break;
|
||
case VALPY_BITXOR:
|
||
op = BINOP_BITWISE_XOR;
|
||
break;
|
||
}
|
||
|
||
if (!handled)
|
||
{
|
||
if (binop_user_defined_p (op, arg1, arg2))
|
||
res_val = value_x_binop (arg1, arg2, op, OP_NULL, EVAL_NORMAL);
|
||
else
|
||
res_val = value_binop (arg1, arg2, op);
|
||
}
|
||
|
||
if (res_val)
|
||
result = value_to_value_object (res_val);
|
||
|
||
do_cleanups (cleanup);
|
||
return result;
|
||
}
|
||
|
||
/* Returns a value object which is the result of applying the operation
|
||
specified by OPCODE to the given arguments. Returns NULL on error, with
|
||
a python exception set. */
|
||
static PyObject *
|
||
valpy_binop (enum valpy_opcode opcode, PyObject *self, PyObject *other)
|
||
{
|
||
PyObject *result = NULL;
|
||
|
||
TRY
|
||
{
|
||
result = valpy_binop_throw (opcode, self, other);
|
||
}
|
||
CATCH (except, RETURN_MASK_ALL)
|
||
{
|
||
GDB_PY_HANDLE_EXCEPTION (except);
|
||
}
|
||
END_CATCH
|
||
|
||
return result;
|
||
}
|
||
|
||
static PyObject *
|
||
valpy_add (PyObject *self, PyObject *other)
|
||
{
|
||
return valpy_binop (VALPY_ADD, self, other);
|
||
}
|
||
|
||
static PyObject *
|
||
valpy_subtract (PyObject *self, PyObject *other)
|
||
{
|
||
return valpy_binop (VALPY_SUB, self, other);
|
||
}
|
||
|
||
static PyObject *
|
||
valpy_multiply (PyObject *self, PyObject *other)
|
||
{
|
||
return valpy_binop (VALPY_MUL, self, other);
|
||
}
|
||
|
||
static PyObject *
|
||
valpy_divide (PyObject *self, PyObject *other)
|
||
{
|
||
return valpy_binop (VALPY_DIV, self, other);
|
||
}
|
||
|
||
static PyObject *
|
||
valpy_remainder (PyObject *self, PyObject *other)
|
||
{
|
||
return valpy_binop (VALPY_REM, self, other);
|
||
}
|
||
|
||
static PyObject *
|
||
valpy_power (PyObject *self, PyObject *other, PyObject *unused)
|
||
{
|
||
/* We don't support the ternary form of pow. I don't know how to express
|
||
that, so let's just throw NotImplementedError to at least do something
|
||
about it. */
|
||
if (unused != Py_None)
|
||
{
|
||
PyErr_SetString (PyExc_NotImplementedError,
|
||
"Invalid operation on gdb.Value.");
|
||
return NULL;
|
||
}
|
||
|
||
return valpy_binop (VALPY_POW, self, other);
|
||
}
|
||
|
||
static PyObject *
|
||
valpy_negative (PyObject *self)
|
||
{
|
||
PyObject *result = NULL;
|
||
|
||
TRY
|
||
{
|
||
/* Perhaps overkill, but consistency has some virtue. */
|
||
struct cleanup *cleanup = make_cleanup_value_free_to_mark (value_mark ());
|
||
struct value *val;
|
||
|
||
val = value_neg (((value_object *) self)->value);
|
||
result = value_to_value_object (val);
|
||
do_cleanups (cleanup);
|
||
}
|
||
CATCH (except, RETURN_MASK_ALL)
|
||
{
|
||
GDB_PY_HANDLE_EXCEPTION (except);
|
||
}
|
||
END_CATCH
|
||
|
||
return result;
|
||
}
|
||
|
||
static PyObject *
|
||
valpy_positive (PyObject *self)
|
||
{
|
||
return value_to_value_object (((value_object *) self)->value);
|
||
}
|
||
|
||
static PyObject *
|
||
valpy_absolute (PyObject *self)
|
||
{
|
||
struct value *value = ((value_object *) self)->value;
|
||
int isabs = 1;
|
||
|
||
TRY
|
||
{
|
||
struct cleanup *cleanup = make_cleanup_value_free_to_mark (value_mark ());
|
||
|
||
if (value_less (value, value_zero (value_type (value), not_lval)))
|
||
isabs = 0;
|
||
|
||
do_cleanups (cleanup);
|
||
}
|
||
CATCH (except, RETURN_MASK_ALL)
|
||
{
|
||
GDB_PY_HANDLE_EXCEPTION (except);
|
||
}
|
||
END_CATCH
|
||
|
||
if (isabs)
|
||
return valpy_positive (self);
|
||
else
|
||
return valpy_negative (self);
|
||
}
|
||
|
||
/* Implements boolean evaluation of gdb.Value. */
|
||
static int
|
||
valpy_nonzero (PyObject *self)
|
||
{
|
||
struct gdb_exception except = exception_none;
|
||
value_object *self_value = (value_object *) self;
|
||
struct type *type;
|
||
int nonzero = 0; /* Appease GCC warning. */
|
||
|
||
TRY
|
||
{
|
||
type = check_typedef (value_type (self_value->value));
|
||
|
||
if (is_integral_type (type) || TYPE_CODE (type) == TYPE_CODE_PTR)
|
||
nonzero = !!value_as_long (self_value->value);
|
||
else if (TYPE_CODE (type) == TYPE_CODE_FLT)
|
||
nonzero = value_as_double (self_value->value) != 0;
|
||
else if (TYPE_CODE (type) == TYPE_CODE_DECFLOAT)
|
||
nonzero = !decimal_is_zero (value_contents (self_value->value),
|
||
TYPE_LENGTH (type),
|
||
gdbarch_byte_order (get_type_arch (type)));
|
||
else
|
||
/* All other values are True. */
|
||
nonzero = 1;
|
||
}
|
||
CATCH (ex, RETURN_MASK_ALL)
|
||
{
|
||
except = ex;
|
||
}
|
||
END_CATCH
|
||
|
||
/* This is not documented in the Python documentation, but if this
|
||
function fails, return -1 as slot_nb_nonzero does (the default
|
||
Python nonzero function). */
|
||
GDB_PY_SET_HANDLE_EXCEPTION (except);
|
||
|
||
return nonzero;
|
||
}
|
||
|
||
/* Implements ~ for value objects. */
|
||
static PyObject *
|
||
valpy_invert (PyObject *self)
|
||
{
|
||
struct value *val = NULL;
|
||
|
||
TRY
|
||
{
|
||
val = value_complement (((value_object *) self)->value);
|
||
}
|
||
CATCH (except, RETURN_MASK_ALL)
|
||
{
|
||
GDB_PY_HANDLE_EXCEPTION (except);
|
||
}
|
||
END_CATCH
|
||
|
||
return value_to_value_object (val);
|
||
}
|
||
|
||
/* Implements left shift for value objects. */
|
||
static PyObject *
|
||
valpy_lsh (PyObject *self, PyObject *other)
|
||
{
|
||
return valpy_binop (VALPY_LSH, self, other);
|
||
}
|
||
|
||
/* Implements right shift for value objects. */
|
||
static PyObject *
|
||
valpy_rsh (PyObject *self, PyObject *other)
|
||
{
|
||
return valpy_binop (VALPY_RSH, self, other);
|
||
}
|
||
|
||
/* Implements bitwise and for value objects. */
|
||
static PyObject *
|
||
valpy_and (PyObject *self, PyObject *other)
|
||
{
|
||
return valpy_binop (VALPY_BITAND, self, other);
|
||
}
|
||
|
||
/* Implements bitwise or for value objects. */
|
||
static PyObject *
|
||
valpy_or (PyObject *self, PyObject *other)
|
||
{
|
||
return valpy_binop (VALPY_BITOR, self, other);
|
||
}
|
||
|
||
/* Implements bitwise xor for value objects. */
|
||
static PyObject *
|
||
valpy_xor (PyObject *self, PyObject *other)
|
||
{
|
||
return valpy_binop (VALPY_BITXOR, self, other);
|
||
}
|
||
|
||
/* Helper for valpy_richcompare. Implements comparison operations for
|
||
value objects. Returns true/false on success. Returns -1 with a
|
||
Python exception set if a Python error is detected. Throws a GDB
|
||
exception on other errors (memory error, etc.). */
|
||
|
||
static int
|
||
valpy_richcompare_throw (PyObject *self, PyObject *other, int op)
|
||
{
|
||
int result;
|
||
struct value *value_other;
|
||
struct value *value_self;
|
||
struct value *mark = value_mark ();
|
||
struct cleanup *cleanup;
|
||
|
||
value_other = convert_value_from_python (other);
|
||
if (value_other == NULL)
|
||
return -1;
|
||
|
||
cleanup = make_cleanup_value_free_to_mark (mark);
|
||
|
||
value_self = ((value_object *) self)->value;
|
||
|
||
switch (op)
|
||
{
|
||
case Py_LT:
|
||
result = value_less (value_self, value_other);
|
||
break;
|
||
case Py_LE:
|
||
result = value_less (value_self, value_other)
|
||
|| value_equal (value_self, value_other);
|
||
break;
|
||
case Py_EQ:
|
||
result = value_equal (value_self, value_other);
|
||
break;
|
||
case Py_NE:
|
||
result = !value_equal (value_self, value_other);
|
||
break;
|
||
case Py_GT:
|
||
result = value_less (value_other, value_self);
|
||
break;
|
||
case Py_GE:
|
||
result = (value_less (value_other, value_self)
|
||
|| value_equal (value_self, value_other));
|
||
break;
|
||
default:
|
||
/* Can't happen. */
|
||
PyErr_SetString (PyExc_NotImplementedError,
|
||
_("Invalid operation on gdb.Value."));
|
||
result = -1;
|
||
break;
|
||
}
|
||
|
||
do_cleanups (cleanup);
|
||
return result;
|
||
}
|
||
|
||
|
||
/* Implements comparison operations for value objects. Returns NULL on error,
|
||
with a python exception set. */
|
||
static PyObject *
|
||
valpy_richcompare (PyObject *self, PyObject *other, int op)
|
||
{
|
||
int result = 0;
|
||
|
||
if (other == Py_None)
|
||
/* Comparing with None is special. From what I can tell, in Python
|
||
None is smaller than anything else. */
|
||
switch (op) {
|
||
case Py_LT:
|
||
case Py_LE:
|
||
case Py_EQ:
|
||
Py_RETURN_FALSE;
|
||
case Py_NE:
|
||
case Py_GT:
|
||
case Py_GE:
|
||
Py_RETURN_TRUE;
|
||
default:
|
||
/* Can't happen. */
|
||
PyErr_SetString (PyExc_NotImplementedError,
|
||
_("Invalid operation on gdb.Value."));
|
||
return NULL;
|
||
}
|
||
|
||
TRY
|
||
{
|
||
result = valpy_richcompare_throw (self, other, op);
|
||
}
|
||
CATCH (except, RETURN_MASK_ALL)
|
||
{
|
||
GDB_PY_HANDLE_EXCEPTION (except);
|
||
}
|
||
END_CATCH
|
||
|
||
/* In this case, the Python exception has already been set. */
|
||
if (result < 0)
|
||
return NULL;
|
||
|
||
if (result == 1)
|
||
Py_RETURN_TRUE;
|
||
|
||
Py_RETURN_FALSE;
|
||
}
|
||
|
||
#ifndef IS_PY3K
|
||
/* Implements conversion to int. */
|
||
static PyObject *
|
||
valpy_int (PyObject *self)
|
||
{
|
||
struct value *value = ((value_object *) self)->value;
|
||
struct type *type = value_type (value);
|
||
LONGEST l = 0;
|
||
|
||
TRY
|
||
{
|
||
if (!is_integral_type (type))
|
||
error (_("Cannot convert value to int."));
|
||
|
||
l = value_as_long (value);
|
||
}
|
||
CATCH (except, RETURN_MASK_ALL)
|
||
{
|
||
GDB_PY_HANDLE_EXCEPTION (except);
|
||
}
|
||
END_CATCH
|
||
|
||
return gdb_py_object_from_longest (l);
|
||
}
|
||
#endif
|
||
|
||
/* Implements conversion to long. */
|
||
static PyObject *
|
||
valpy_long (PyObject *self)
|
||
{
|
||
struct value *value = ((value_object *) self)->value;
|
||
struct type *type = value_type (value);
|
||
LONGEST l = 0;
|
||
|
||
TRY
|
||
{
|
||
type = check_typedef (type);
|
||
|
||
if (!is_integral_type (type)
|
||
&& TYPE_CODE (type) != TYPE_CODE_PTR)
|
||
error (_("Cannot convert value to long."));
|
||
|
||
l = value_as_long (value);
|
||
}
|
||
CATCH (except, RETURN_MASK_ALL)
|
||
{
|
||
GDB_PY_HANDLE_EXCEPTION (except);
|
||
}
|
||
END_CATCH
|
||
|
||
return gdb_py_long_from_longest (l);
|
||
}
|
||
|
||
/* Implements conversion to float. */
|
||
static PyObject *
|
||
valpy_float (PyObject *self)
|
||
{
|
||
struct value *value = ((value_object *) self)->value;
|
||
struct type *type = value_type (value);
|
||
double d = 0;
|
||
|
||
TRY
|
||
{
|
||
type = check_typedef (type);
|
||
|
||
if (TYPE_CODE (type) != TYPE_CODE_FLT)
|
||
error (_("Cannot convert value to float."));
|
||
|
||
d = value_as_double (value);
|
||
}
|
||
CATCH (except, RETURN_MASK_ALL)
|
||
{
|
||
GDB_PY_HANDLE_EXCEPTION (except);
|
||
}
|
||
END_CATCH
|
||
|
||
return PyFloat_FromDouble (d);
|
||
}
|
||
|
||
/* Returns an object for a value which is released from the all_values chain,
|
||
so its lifetime is not bound to the execution of a command. */
|
||
PyObject *
|
||
value_to_value_object (struct value *val)
|
||
{
|
||
value_object *val_obj;
|
||
|
||
val_obj = PyObject_New (value_object, &value_object_type);
|
||
if (val_obj != NULL)
|
||
{
|
||
val_obj->value = val;
|
||
release_value_or_incref (val);
|
||
val_obj->address = NULL;
|
||
val_obj->type = NULL;
|
||
val_obj->dynamic_type = NULL;
|
||
note_value (val_obj);
|
||
}
|
||
|
||
return (PyObject *) val_obj;
|
||
}
|
||
|
||
/* Returns a borrowed reference to the struct value corresponding to
|
||
the given value object. */
|
||
struct value *
|
||
value_object_to_value (PyObject *self)
|
||
{
|
||
value_object *real;
|
||
|
||
if (! PyObject_TypeCheck (self, &value_object_type))
|
||
return NULL;
|
||
real = (value_object *) self;
|
||
return real->value;
|
||
}
|
||
|
||
/* Try to convert a Python value to a gdb value. If the value cannot
|
||
be converted, set a Python exception and return NULL. Returns a
|
||
reference to a new value on the all_values chain. */
|
||
|
||
struct value *
|
||
convert_value_from_python (PyObject *obj)
|
||
{
|
||
struct value *value = NULL; /* -Wall */
|
||
int cmp;
|
||
|
||
gdb_assert (obj != NULL);
|
||
|
||
TRY
|
||
{
|
||
if (PyBool_Check (obj))
|
||
{
|
||
cmp = PyObject_IsTrue (obj);
|
||
if (cmp >= 0)
|
||
value = value_from_longest (builtin_type_pybool, cmp);
|
||
}
|
||
/* Make a long logic check first. In Python 3.x, internally,
|
||
all integers are represented as longs. In Python 2.x, there
|
||
is still a differentiation internally between a PyInt and a
|
||
PyLong. Explicitly do this long check conversion first. In
|
||
GDB, for Python 3.x, we #ifdef PyInt = PyLong. This check has
|
||
to be done first to ensure we do not lose information in the
|
||
conversion process. */
|
||
else if (PyLong_Check (obj))
|
||
{
|
||
LONGEST l = PyLong_AsLongLong (obj);
|
||
|
||
if (PyErr_Occurred ())
|
||
{
|
||
/* If the error was an overflow, we can try converting to
|
||
ULONGEST instead. */
|
||
if (PyErr_ExceptionMatches (PyExc_OverflowError))
|
||
{
|
||
PyObject *etype, *evalue, *etraceback, *zero;
|
||
|
||
PyErr_Fetch (&etype, &evalue, &etraceback);
|
||
zero = PyInt_FromLong (0);
|
||
|
||
/* Check whether obj is positive. */
|
||
if (PyObject_RichCompareBool (obj, zero, Py_GT) > 0)
|
||
{
|
||
ULONGEST ul;
|
||
|
||
ul = PyLong_AsUnsignedLongLong (obj);
|
||
if (! PyErr_Occurred ())
|
||
value = value_from_ulongest (builtin_type_upylong, ul);
|
||
}
|
||
else
|
||
/* There's nothing we can do. */
|
||
PyErr_Restore (etype, evalue, etraceback);
|
||
|
||
Py_DECREF (zero);
|
||
}
|
||
}
|
||
else
|
||
value = value_from_longest (builtin_type_pylong, l);
|
||
}
|
||
else if (PyInt_Check (obj))
|
||
{
|
||
long l = PyInt_AsLong (obj);
|
||
|
||
if (! PyErr_Occurred ())
|
||
value = value_from_longest (builtin_type_pyint, l);
|
||
}
|
||
else if (PyFloat_Check (obj))
|
||
{
|
||
double d = PyFloat_AsDouble (obj);
|
||
|
||
if (! PyErr_Occurred ())
|
||
value = value_from_double (builtin_type_pyfloat, d);
|
||
}
|
||
else if (gdbpy_is_string (obj))
|
||
{
|
||
char *s;
|
||
|
||
s = python_string_to_target_string (obj);
|
||
if (s != NULL)
|
||
{
|
||
struct cleanup *old;
|
||
|
||
old = make_cleanup (xfree, s);
|
||
value = value_cstring (s, strlen (s), builtin_type_pychar);
|
||
do_cleanups (old);
|
||
}
|
||
}
|
||
else if (PyObject_TypeCheck (obj, &value_object_type))
|
||
value = value_copy (((value_object *) obj)->value);
|
||
else if (gdbpy_is_lazy_string (obj))
|
||
{
|
||
PyObject *result;
|
||
|
||
result = PyObject_CallMethodObjArgs (obj, gdbpy_value_cst, NULL);
|
||
value = value_copy (((value_object *) result)->value);
|
||
}
|
||
else
|
||
#ifdef IS_PY3K
|
||
PyErr_Format (PyExc_TypeError,
|
||
_("Could not convert Python object: %S."), obj);
|
||
#else
|
||
PyErr_Format (PyExc_TypeError,
|
||
_("Could not convert Python object: %s."),
|
||
PyString_AsString (PyObject_Str (obj)));
|
||
#endif
|
||
}
|
||
CATCH (except, RETURN_MASK_ALL)
|
||
{
|
||
PyErr_Format (except.reason == RETURN_QUIT
|
||
? PyExc_KeyboardInterrupt : PyExc_RuntimeError,
|
||
"%s", except.message);
|
||
return NULL;
|
||
}
|
||
END_CATCH
|
||
|
||
return value;
|
||
}
|
||
|
||
/* Returns value object in the ARGth position in GDB's history. */
|
||
PyObject *
|
||
gdbpy_history (PyObject *self, PyObject *args)
|
||
{
|
||
int i;
|
||
struct value *res_val = NULL; /* Initialize to appease gcc warning. */
|
||
|
||
if (!PyArg_ParseTuple (args, "i", &i))
|
||
return NULL;
|
||
|
||
TRY
|
||
{
|
||
res_val = access_value_history (i);
|
||
}
|
||
CATCH (except, RETURN_MASK_ALL)
|
||
{
|
||
GDB_PY_HANDLE_EXCEPTION (except);
|
||
}
|
||
END_CATCH
|
||
|
||
return value_to_value_object (res_val);
|
||
}
|
||
|
||
/* Returns 1 in OBJ is a gdb.Value object, 0 otherwise. */
|
||
|
||
int
|
||
gdbpy_is_value_object (PyObject *obj)
|
||
{
|
||
return PyObject_TypeCheck (obj, &value_object_type);
|
||
}
|
||
|
||
int
|
||
gdbpy_initialize_values (void)
|
||
{
|
||
if (PyType_Ready (&value_object_type) < 0)
|
||
return -1;
|
||
|
||
return gdb_pymodule_addobject (gdb_module, "Value",
|
||
(PyObject *) &value_object_type);
|
||
}
|
||
|
||
|
||
|
||
static PyGetSetDef value_object_getset[] = {
|
||
{ "address", valpy_get_address, NULL, "The address of the value.",
|
||
NULL },
|
||
{ "is_optimized_out", valpy_get_is_optimized_out, NULL,
|
||
"Boolean telling whether the value is optimized "
|
||
"out (i.e., not available).",
|
||
NULL },
|
||
{ "type", valpy_get_type, NULL, "Type of the value.", NULL },
|
||
{ "dynamic_type", valpy_get_dynamic_type, NULL,
|
||
"Dynamic type of the value.", NULL },
|
||
{ "is_lazy", valpy_get_is_lazy, NULL,
|
||
"Boolean telling whether the value is lazy (not fetched yet\n\
|
||
from the inferior). A lazy value is fetched when needed, or when\n\
|
||
the \"fetch_lazy()\" method is called.", NULL },
|
||
{NULL} /* Sentinel */
|
||
};
|
||
|
||
static PyMethodDef value_object_methods[] = {
|
||
{ "cast", valpy_cast, METH_VARARGS, "Cast the value to the supplied type." },
|
||
{ "dynamic_cast", valpy_dynamic_cast, METH_VARARGS,
|
||
"dynamic_cast (gdb.Type) -> gdb.Value\n\
|
||
Cast the value to the supplied type, as if by the C++ dynamic_cast operator."
|
||
},
|
||
{ "reinterpret_cast", valpy_reinterpret_cast, METH_VARARGS,
|
||
"reinterpret_cast (gdb.Type) -> gdb.Value\n\
|
||
Cast the value to the supplied type, as if by the C++\n\
|
||
reinterpret_cast operator."
|
||
},
|
||
{ "dereference", valpy_dereference, METH_NOARGS, "Dereferences the value." },
|
||
{ "referenced_value", valpy_referenced_value, METH_NOARGS,
|
||
"Return the value referenced by a TYPE_CODE_REF or TYPE_CODE_PTR value." },
|
||
{ "reference_value", valpy_reference_value, METH_NOARGS,
|
||
"Return a value of type TYPE_CODE_REF referencing this value." },
|
||
{ "const_value", valpy_const_value, METH_NOARGS,
|
||
"Return a 'const' qualied version of the same value." },
|
||
{ "lazy_string", (PyCFunction) valpy_lazy_string,
|
||
METH_VARARGS | METH_KEYWORDS,
|
||
"lazy_string ([encoding] [, length]) -> lazy_string\n\
|
||
Return a lazy string representation of the value." },
|
||
{ "string", (PyCFunction) valpy_string, METH_VARARGS | METH_KEYWORDS,
|
||
"string ([encoding] [, errors] [, length]) -> string\n\
|
||
Return Unicode string representation of the value." },
|
||
{ "fetch_lazy", valpy_fetch_lazy, METH_NOARGS,
|
||
"Fetches the value from the inferior, if it was lazy." },
|
||
{NULL} /* Sentinel */
|
||
};
|
||
|
||
static PyNumberMethods value_object_as_number = {
|
||
valpy_add,
|
||
valpy_subtract,
|
||
valpy_multiply,
|
||
#ifndef IS_PY3K
|
||
valpy_divide,
|
||
#endif
|
||
valpy_remainder,
|
||
NULL, /* nb_divmod */
|
||
valpy_power, /* nb_power */
|
||
valpy_negative, /* nb_negative */
|
||
valpy_positive, /* nb_positive */
|
||
valpy_absolute, /* nb_absolute */
|
||
valpy_nonzero, /* nb_nonzero */
|
||
valpy_invert, /* nb_invert */
|
||
valpy_lsh, /* nb_lshift */
|
||
valpy_rsh, /* nb_rshift */
|
||
valpy_and, /* nb_and */
|
||
valpy_xor, /* nb_xor */
|
||
valpy_or, /* nb_or */
|
||
#ifdef IS_PY3K
|
||
valpy_long, /* nb_int */
|
||
NULL, /* reserved */
|
||
#else
|
||
NULL, /* nb_coerce */
|
||
valpy_int, /* nb_int */
|
||
valpy_long, /* nb_long */
|
||
#endif
|
||
valpy_float, /* nb_float */
|
||
#ifndef IS_PY3K
|
||
NULL, /* nb_oct */
|
||
NULL, /* nb_hex */
|
||
#endif
|
||
NULL, /* nb_inplace_add */
|
||
NULL, /* nb_inplace_subtract */
|
||
NULL, /* nb_inplace_multiply */
|
||
NULL, /* nb_inplace_remainder */
|
||
NULL, /* nb_inplace_power */
|
||
NULL, /* nb_inplace_lshift */
|
||
NULL, /* nb_inplace_rshift */
|
||
NULL, /* nb_inplace_and */
|
||
NULL, /* nb_inplace_xor */
|
||
NULL, /* nb_inplace_or */
|
||
NULL, /* nb_floor_divide */
|
||
valpy_divide /* nb_true_divide */
|
||
};
|
||
|
||
static PyMappingMethods value_object_as_mapping = {
|
||
valpy_length,
|
||
valpy_getitem,
|
||
valpy_setitem
|
||
};
|
||
|
||
PyTypeObject value_object_type = {
|
||
PyVarObject_HEAD_INIT (NULL, 0)
|
||
"gdb.Value", /*tp_name*/
|
||
sizeof (value_object), /*tp_basicsize*/
|
||
0, /*tp_itemsize*/
|
||
valpy_dealloc, /*tp_dealloc*/
|
||
0, /*tp_print*/
|
||
0, /*tp_getattr*/
|
||
0, /*tp_setattr*/
|
||
0, /*tp_compare*/
|
||
0, /*tp_repr*/
|
||
&value_object_as_number, /*tp_as_number*/
|
||
0, /*tp_as_sequence*/
|
||
&value_object_as_mapping, /*tp_as_mapping*/
|
||
valpy_hash, /*tp_hash*/
|
||
valpy_call, /*tp_call*/
|
||
valpy_str, /*tp_str*/
|
||
0, /*tp_getattro*/
|
||
0, /*tp_setattro*/
|
||
0, /*tp_as_buffer*/
|
||
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_CHECKTYPES
|
||
| Py_TPFLAGS_BASETYPE, /*tp_flags*/
|
||
"GDB value object", /* tp_doc */
|
||
0, /* tp_traverse */
|
||
0, /* tp_clear */
|
||
valpy_richcompare, /* tp_richcompare */
|
||
0, /* tp_weaklistoffset */
|
||
0, /* tp_iter */
|
||
0, /* tp_iternext */
|
||
value_object_methods, /* tp_methods */
|
||
0, /* tp_members */
|
||
value_object_getset, /* tp_getset */
|
||
0, /* tp_base */
|
||
0, /* tp_dict */
|
||
0, /* tp_descr_get */
|
||
0, /* tp_descr_set */
|
||
0, /* tp_dictoffset */
|
||
0, /* tp_init */
|
||
0, /* tp_alloc */
|
||
valpy_new /* tp_new */
|
||
};
|