1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
|
/* Copyright (C) 2013-2015 Free Software Foundation, Inc.
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 "python-internal.h"
#include "varobj.h"
#include "varobj-iter.h"
/* A dynamic varobj iterator "class" for python pretty-printed
varobjs. This inherits struct varobj_iter. */
struct py_varobj_iter
{
/* The 'base class'. */
struct varobj_iter base;
/* The python iterator returned by the printer's 'children' method,
or NULL if not available. */
PyObject *iter;
};
/* Implementation of the 'dtor' method of pretty-printed varobj
iterators. */
static void
py_varobj_iter_dtor (struct varobj_iter *self)
{
struct py_varobj_iter *dis = (struct py_varobj_iter *) self;
struct cleanup *back_to = varobj_ensure_python_env (self->var);
Py_XDECREF (dis->iter);
do_cleanups (back_to);
}
/* Implementation of the 'next' method of pretty-printed varobj
iterators. */
static varobj_item *
py_varobj_iter_next (struct varobj_iter *self)
{
struct py_varobj_iter *t = (struct py_varobj_iter *) self;
struct cleanup *back_to;
PyObject *item;
PyObject *py_v;
varobj_item *vitem;
const char *name = NULL;
if (!gdb_python_initialized)
return NULL;
back_to = varobj_ensure_python_env (self->var);
item = PyIter_Next (t->iter);
if (item == NULL)
{
/* Normal end of iteration. */
if (!PyErr_Occurred ())
return NULL;
/* If we got a memory error, just use the text as the item. */
if (PyErr_ExceptionMatches (gdbpy_gdb_memory_error))
{
PyObject *type, *value, *trace;
char *name_str, *value_str;
PyErr_Fetch (&type, &value, &trace);
value_str = gdbpy_exception_to_string (type, value);
Py_XDECREF (type);
Py_XDECREF (value);
Py_XDECREF (trace);
if (value_str == NULL)
{
gdbpy_print_stack ();
return NULL;
}
name_str = xstrprintf ("<error at %d>",
self->next_raw_index++);
item = Py_BuildValue ("(ss)", name_str, value_str);
xfree (name_str);
xfree (value_str);
if (item == NULL)
{
gdbpy_print_stack ();
return NULL;
}
}
else
{
/* Any other kind of error. */
gdbpy_print_stack ();
return NULL;
}
}
if (!PyArg_ParseTuple (item, "sO", &name, &py_v))
{
gdbpy_print_stack ();
error (_("Invalid item from the child list"));
}
vitem = XNEW (struct varobj_item);
vitem->value = convert_value_from_python (py_v);
if (vitem->value == NULL)
gdbpy_print_stack ();
vitem->name = xstrdup (name);
self->next_raw_index++;
do_cleanups (back_to);
return vitem;
}
/* The 'vtable' of pretty-printed python varobj iterators. */
static const struct varobj_iter_ops py_varobj_iter_ops =
{
py_varobj_iter_dtor,
py_varobj_iter_next
};
/* Constructor of pretty-printed varobj iterators. VAR is the varobj
whose children the iterator will be iterating over. PYITER is the
python iterator actually responsible for the iteration. */
static void CPYCHECKER_STEALS_REFERENCE_TO_ARG (3)
py_varobj_iter_ctor (struct py_varobj_iter *self,
struct varobj *var, PyObject *pyiter)
{
self->base.var = var;
self->base.ops = &py_varobj_iter_ops;
self->base.next_raw_index = 0;
self->iter = pyiter;
}
/* Allocate and construct a pretty-printed varobj iterator. VAR is
the varobj whose children the iterator will be iterating over.
PYITER is the python iterator actually responsible for the
iteration. */
static struct py_varobj_iter * CPYCHECKER_STEALS_REFERENCE_TO_ARG (2)
py_varobj_iter_new (struct varobj *var, PyObject *pyiter)
{
struct py_varobj_iter *self;
self = XNEW (struct py_varobj_iter);
py_varobj_iter_ctor (self, var, pyiter);
return self;
}
/* Return a new pretty-printed varobj iterator suitable to iterate
over VAR's children. */
struct varobj_iter *
py_varobj_get_iterator (struct varobj *var, PyObject *printer)
{
PyObject *children;
int i;
PyObject *iter;
struct py_varobj_iter *py_iter;
struct cleanup *back_to = varobj_ensure_python_env (var);
if (!PyObject_HasAttr (printer, gdbpy_children_cst))
{
do_cleanups (back_to);
return NULL;
}
children = PyObject_CallMethodObjArgs (printer, gdbpy_children_cst,
NULL);
if (children == NULL)
{
gdbpy_print_stack ();
error (_("Null value returned for children"));
}
make_cleanup_py_decref (children);
iter = PyObject_GetIter (children);
if (iter == NULL)
{
gdbpy_print_stack ();
error (_("Could not get children iterator"));
}
py_iter = py_varobj_iter_new (var, iter);
do_cleanups (back_to);
return &py_iter->base;
}
|
