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1d506c26 | 1 | # Copyright 2022-2024 Free Software Foundation, Inc. |
de7d7cb5 TT |
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 | ||
fc2d72af TT |
16 | import gdb |
17 | ||
7729e7c0 | 18 | from .events import exec_and_expect_stop |
de7d7cb5 | 19 | from .server import capability, request |
fc2d72af | 20 | from .startup import in_gdb_thread, send_gdb, send_gdb_with_response |
de7d7cb5 TT |
21 | from .state import set_thread |
22 | ||
23 | ||
fc2d72af TT |
24 | # Helper function to set the current thread and the scheduler-locking |
25 | # mode. Returns True if scheduler-locking was successfully set to | |
91c7233d TT |
26 | # 'on', False in all other cases, including error. When SELECT is |
27 | # True, also select that thread's newest frame. | |
fc2d72af | 28 | @in_gdb_thread |
91c7233d | 29 | def _handle_thread_step(thread_id, single_thread, select=False): |
de7d7cb5 | 30 | # Ensure we're going to step the correct thread. |
fc2d72af TT |
31 | set_thread(thread_id) |
32 | if single_thread: | |
33 | result = True | |
34 | arg = "on" | |
35 | else: | |
36 | result = False | |
37 | arg = "off" | |
38 | try: | |
39 | # This can fail, depending on the target, so catch the error | |
40 | # and report to our caller. We can't use exec_and_log because | |
41 | # that does not propagate exceptions. | |
42 | gdb.execute("set scheduler-locking " + arg, from_tty=True, to_string=True) | |
43 | except gdb.error: | |
44 | result = False | |
91c7233d TT |
45 | # Other DAP code may select a frame, and the "finish" command uses |
46 | # the selected frame. | |
47 | if select: | |
48 | gdb.newest_frame().select() | |
fc2d72af | 49 | return result |
de7d7cb5 TT |
50 | |
51 | ||
c98921b2 | 52 | @request("next", response=False) |
51058658 TT |
53 | def next( |
54 | *, threadId: int, singleThread: bool = False, granularity: str = "statement", **args | |
55 | ): | |
c98921b2 | 56 | _handle_thread_step(threadId, singleThread) |
de7d7cb5 TT |
57 | cmd = "next" |
58 | if granularity == "instruction": | |
59 | cmd += "i" | |
7729e7c0 | 60 | exec_and_expect_stop(cmd) |
de7d7cb5 TT |
61 | |
62 | ||
63 | @capability("supportsSteppingGranularity") | |
fc2d72af | 64 | @capability("supportsSingleThreadExecutionRequests") |
c98921b2 | 65 | @request("stepIn", response=False) |
51058658 TT |
66 | def step_in( |
67 | *, threadId: int, singleThread: bool = False, granularity: str = "statement", **args | |
68 | ): | |
c98921b2 | 69 | _handle_thread_step(threadId, singleThread) |
de7d7cb5 TT |
70 | cmd = "step" |
71 | if granularity == "instruction": | |
72 | cmd += "i" | |
7729e7c0 | 73 | exec_and_expect_stop(cmd) |
de7d7cb5 TT |
74 | |
75 | ||
c98921b2 | 76 | @request("stepOut", response=False) |
d2266b23 | 77 | def step_out(*, threadId: int, singleThread: bool = False, **args): |
c98921b2 | 78 | _handle_thread_step(threadId, singleThread, True) |
7729e7c0 | 79 | exec_and_expect_stop("finish") |
3eb64586 TT |
80 | |
81 | ||
c98921b2 TT |
82 | # This is a server-side request because it is funny: it wants to |
83 | # 'continue' but also return a result, which precludes using | |
84 | # response=False. Using 'continue &' would mostly work ok, but this | |
85 | # yields races when a stop occurs before the response is sent back to | |
86 | # the client. | |
87 | @request("continue", on_dap_thread=True) | |
51058658 | 88 | def continue_request(*, threadId: int, singleThread: bool = False, **args): |
fc2d72af | 89 | locked = send_gdb_with_response(lambda: _handle_thread_step(threadId, singleThread)) |
7729e7c0 | 90 | send_gdb(lambda: exec_and_expect_stop("continue")) |
fc2d72af | 91 | return {"allThreadsContinued": not locked} |