projects / binutils.git / blame
| Commit | Line | Data |
|---|---|---|
| 4a94e368 | 1 | # Copyright (C) 2021-2022 Free Software Foundation, Inc. |
| 61e2dde2 AB |
2 | |
| 3 | # This program is free software; you can redistribute it and/or modify | |
| 4 | # it under the terms of the GNU General Public License as published by | |
| 5 | # the Free Software Foundation; either version 3 of the License, or | |
| 6 | # (at your option) any later version. | |
| 7 | # | |
| 8 | # This program is distributed in the hope that it will be useful, | |
| 9 | # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 10 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 11 | # GNU General Public License for more details. | |
| 12 | # | |
| 13 | # You should have received a copy of the GNU General Public License | |
| 14 | # along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 15 | ||
| 16 | import gdb | |
| 17 | from gdb.unwinder import Unwinder | |
| 18 | ||
| 19 | ||
| 20 | class FrameId(object): | |
| 21 | def __init__(self, sp, pc): | |
| 22 | self._sp = sp | |
| 23 | self._pc = pc | |
| 24 | ||
| 25 | @property | |
| 26 | def sp(self): | |
| 27 | return self._sp | |
| 28 | ||
| 29 | @property | |
| 30 | def pc(self): | |
| 31 | return self._pc | |
| 32 | ||
| 33 | ||
| 34 | class TestUnwinder(Unwinder): | |
| 35 | def __init__(self, use_descriptors): | |
| 36 | if use_descriptors: | |
| 37 | tag = "using descriptors" | |
| 38 | else: | |
| 39 | tag = "using strings" | |
| 40 | ||
| 41 | Unwinder.__init__(self, "break unwinding %s" % tag) | |
| 42 | self._use_descriptors = use_descriptors | |
| 43 | ||
| 44 | def __call__(self, pending_frame): | |
| 45 | pc_desc = pending_frame.architecture().registers().find("pc") | |
| 46 | pc = pending_frame.read_register(pc_desc) | |
| 47 | ||
| 48 | sp_desc = pending_frame.architecture().registers().find("sp") | |
| 49 | sp = pending_frame.read_register(sp_desc) | |
| 50 | ||
| 51 | block = gdb.block_for_pc(int(pc)) | |
| 52 | if block is None: | |
| 53 | return None | |
| 54 | func = block.function | |
| 55 | if func is None: | |
| 56 | return None | |
| 57 | if str(func) != "bar": | |
| 58 | return None | |
| 59 | ||
| 60 | fid = FrameId(pc, sp) | |
| 61 | unwinder = pending_frame.create_unwind_info(fid) | |
| 62 | if self._use_descriptors: | |
| 63 | unwinder.add_saved_register(pc_desc, pc) | |
| 64 | unwinder.add_saved_register(sp_desc, sp) | |
| 65 | else: | |
| 66 | unwinder.add_saved_register("pc", pc) | |
| 67 | unwinder.add_saved_register("sp", sp) | |
| 68 | return unwinder | |
| 69 | ||
| 70 | ||
| 71 | gdb.unwinder.register_unwinder(None, TestUnwinder(True), True) | |
| 72 | gdb.unwinder.register_unwinder(None, TestUnwinder(False), True) |