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
|
# Copyright (C) 2021-2023 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/>.
import gdb
from gdb.unwinder import Unwinder
class FrameId(object):
def __init__(self, sp, pc):
self._sp = sp
self._pc = pc
@property
def sp(self):
return self._sp
@property
def pc(self):
return self._pc
class TestUnwinder(Unwinder):
def __init__(self, use_descriptors):
if use_descriptors:
tag = "using descriptors"
else:
tag = "using strings"
Unwinder.__init__(self, "break unwinding %s" % tag)
self._use_descriptors = use_descriptors
def __call__(self, pending_frame):
pc_desc = pending_frame.architecture().registers().find("pc")
pc = pending_frame.read_register(pc_desc)
sp_desc = pending_frame.architecture().registers().find("sp")
sp = pending_frame.read_register(sp_desc)
block = gdb.block_for_pc(int(pc))
if block is None:
return None
func = block.function
if func is None:
return None
if str(func) != "bar":
return None
fid = FrameId(pc, sp)
unwinder = pending_frame.create_unwind_info(fid)
if self._use_descriptors:
unwinder.add_saved_register(pc_desc, pc)
unwinder.add_saved_register(sp_desc, sp)
else:
unwinder.add_saved_register("pc", pc)
unwinder.add_saved_register("sp", sp)
return unwinder
gdb.unwinder.register_unwinder(None, TestUnwinder(True), True)
gdb.unwinder.register_unwinder(None, TestUnwinder(False), True)
|
