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ce3a066d | 1 | /* Inferior process information for the remote server for GDB. |
4a94e368 | 2 | Copyright (C) 2002-2022 Free Software Foundation, Inc. |
ce3a066d DJ |
3 | |
4 | Contributed by MontaVista Software. | |
5 | ||
6 | This file is part of GDB. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 10 | the Free Software Foundation; either version 3 of the License, or |
ce3a066d DJ |
11 | (at your option) any later version. |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
ce3a066d | 20 | |
ce3a066d | 21 | #include "server.h" |
89e94ec9 | 22 | #include "gdbsupport/common-inferior.h" |
623b6bdf | 23 | #include "gdbthread.h" |
799cdc37 | 24 | #include "dll.h" |
ce3a066d | 25 | |
9179355e | 26 | std::list<process_info *> all_processes; |
9c80ecd6 | 27 | std::list<thread_info *> all_threads; |
0d62e5e8 | 28 | |
7f8acede PA |
29 | /* The current process. */ |
30 | static process_info *current_process_; | |
31 | ||
32 | /* The current thread. This is either a thread of CURRENT_PROCESS, or | |
33 | NULL. */ | |
0bfdf32f | 34 | struct thread_info *current_thread; |
0d62e5e8 | 35 | |
11bd012e SM |
36 | /* The current working directory used to start the inferior. |
37 | ||
38 | Empty if not specified. */ | |
39 | static std::string current_inferior_cwd; | |
d092c5a2 | 40 | |
f7667f0d | 41 | struct thread_info * |
95954743 | 42 | add_thread (ptid_t thread_id, void *target_data) |
0d62e5e8 | 43 | { |
d2f325df | 44 | thread_info *new_thread = new thread_info (thread_id, target_data); |
0d62e5e8 | 45 | |
9c80ecd6 | 46 | all_threads.push_back (new_thread); |
255e7678 | 47 | |
0bfdf32f | 48 | if (current_thread == NULL) |
24583e45 | 49 | switch_to_thread (new_thread); |
ce3a066d | 50 | |
f7667f0d | 51 | return new_thread; |
a06660f7 DJ |
52 | } |
53 | ||
9c80ecd6 | 54 | /* See gdbthread.h. */ |
649ebbca | 55 | |
dae5f5cf | 56 | struct thread_info * |
649ebbca | 57 | get_first_thread (void) |
a06660f7 | 58 | { |
9c80ecd6 SM |
59 | if (!all_threads.empty ()) |
60 | return all_threads.front (); | |
61 | else | |
62 | return NULL; | |
649ebbca | 63 | } |
a06660f7 | 64 | |
649ebbca DE |
65 | struct thread_info * |
66 | find_thread_ptid (ptid_t ptid) | |
67 | { | |
8dc7b443 SM |
68 | return find_thread ([&] (thread_info *thread) { |
69 | return thread->id == ptid; | |
70 | }); | |
dae5f5cf DJ |
71 | } |
72 | ||
96e7a1eb AR |
73 | /* Find a thread associated with the given PROCESS, or NULL if no |
74 | such thread exists. */ | |
75 | ||
76 | static struct thread_info * | |
77 | find_thread_process (const struct process_info *const process) | |
78 | { | |
9179355e | 79 | return find_any_thread_of_pid (process->pid); |
96e7a1eb AR |
80 | } |
81 | ||
34c65914 PA |
82 | /* See gdbthread.h. */ |
83 | ||
84 | struct thread_info * | |
85 | find_any_thread_of_pid (int pid) | |
86 | { | |
4d3bb80e SM |
87 | return find_thread (pid, [] (thread_info *thread) { |
88 | return true; | |
89 | }); | |
34c65914 PA |
90 | } |
91 | ||
0d62e5e8 | 92 | static void |
9c80ecd6 | 93 | free_one_thread (thread_info *thread) |
0d62e5e8 | 94 | { |
d2f325df | 95 | delete thread; |
0d62e5e8 DJ |
96 | } |
97 | ||
98 | void | |
99 | remove_thread (struct thread_info *thread) | |
100 | { | |
9accd112 MM |
101 | if (thread->btrace != NULL) |
102 | target_disable_btrace (thread->btrace); | |
103 | ||
465a859e | 104 | discard_queued_stop_replies (ptid_of (thread)); |
9c80ecd6 | 105 | all_threads.remove (thread); |
96e7a1eb | 106 | if (current_thread == thread) |
24583e45 | 107 | switch_to_thread (nullptr); |
a9b45cb7 | 108 | free_one_thread (thread); |
ce3a066d DJ |
109 | } |
110 | ||
611cb4a5 | 111 | void * |
6afd337d | 112 | thread_target_data (struct thread_info *thread) |
611cb4a5 | 113 | { |
6afd337d | 114 | return thread->target_data; |
611cb4a5 DJ |
115 | } |
116 | ||
a44892be | 117 | struct regcache * |
6afd337d | 118 | thread_regcache_data (struct thread_info *thread) |
c04a1aa8 | 119 | { |
6afd337d | 120 | return thread->regcache_data; |
c04a1aa8 DJ |
121 | } |
122 | ||
123 | void | |
6afd337d | 124 | set_thread_regcache_data (struct thread_info *thread, struct regcache *data) |
c04a1aa8 | 125 | { |
6afd337d | 126 | thread->regcache_data = data; |
c04a1aa8 | 127 | } |
255e7678 | 128 | |
255e7678 DJ |
129 | void |
130 | clear_inferiors (void) | |
131 | { | |
f0045347 | 132 | for_each_thread (free_one_thread); |
9c80ecd6 | 133 | all_threads.clear (); |
bf4c19f7 YQ |
134 | |
135 | clear_dlls (); | |
7284e1be | 136 | |
24583e45 | 137 | switch_to_thread (nullptr); |
7f8acede | 138 | current_process_ = nullptr; |
255e7678 | 139 | } |
24a09b5f | 140 | |
95954743 PA |
141 | struct process_info * |
142 | add_process (int pid, int attached) | |
143 | { | |
f27866ba | 144 | process_info *process = new process_info (pid, attached); |
95954743 | 145 | |
9179355e | 146 | all_processes.push_back (process); |
95954743 PA |
147 | |
148 | return process; | |
149 | } | |
150 | ||
5091eb23 DE |
151 | /* Remove a process from the common process list and free the memory |
152 | allocated for it. | |
153 | The caller is responsible for freeing private data first. */ | |
154 | ||
95954743 PA |
155 | void |
156 | remove_process (struct process_info *process) | |
157 | { | |
158 | clear_symbol_cache (&process->symbol_cache); | |
159 | free_all_breakpoints (process); | |
96e7a1eb | 160 | gdb_assert (find_thread_process (process) == NULL); |
9179355e | 161 | all_processes.remove (process); |
7f8acede PA |
162 | if (current_process () == process) |
163 | switch_to_process (nullptr); | |
f27866ba | 164 | delete process; |
95954743 PA |
165 | } |
166 | ||
9179355e | 167 | process_info * |
95954743 PA |
168 | find_process_pid (int pid) |
169 | { | |
9179355e SM |
170 | return find_process ([&] (process_info *process) { |
171 | return process->pid == pid; | |
172 | }); | |
95954743 PA |
173 | } |
174 | ||
9179355e | 175 | /* Get the first process in the process list, or NULL if the list is empty. */ |
3d40fbb5 | 176 | |
9179355e | 177 | process_info * |
3d40fbb5 PA |
178 | get_first_process (void) |
179 | { | |
9179355e SM |
180 | if (!all_processes.empty ()) |
181 | return all_processes.front (); | |
182 | else | |
183 | return NULL; | |
9f767825 DE |
184 | } |
185 | ||
186 | /* Return non-zero if there are any inferiors that we have created | |
187 | (as opposed to attached-to). */ | |
188 | ||
189 | int | |
190 | have_started_inferiors_p (void) | |
191 | { | |
9179355e SM |
192 | return find_process ([] (process_info *process) { |
193 | return !process->attached; | |
194 | }) != NULL; | |
9f767825 DE |
195 | } |
196 | ||
197 | /* Return non-zero if there are any inferiors that we have attached to. */ | |
198 | ||
199 | int | |
200 | have_attached_inferiors_p (void) | |
201 | { | |
9179355e SM |
202 | return find_process ([] (process_info *process) { |
203 | return process->attached; | |
204 | }) != NULL; | |
9f767825 DE |
205 | } |
206 | ||
7fe519cb | 207 | struct process_info * |
63c40ec7 | 208 | get_thread_process (const struct thread_info *thread) |
95954743 | 209 | { |
9c80ecd6 | 210 | return find_process_pid (thread->id.pid ()); |
95954743 PA |
211 | } |
212 | ||
213 | struct process_info * | |
214 | current_process (void) | |
215 | { | |
7f8acede | 216 | return current_process_; |
95954743 | 217 | } |
984a2c04 | 218 | |
268a13a5 | 219 | /* See gdbsupport/common-gdbthread.h. */ |
043a4934 SDJ |
220 | |
221 | void | |
5b6d1e4f | 222 | switch_to_thread (process_stratum_target *ops, ptid_t ptid) |
043a4934 | 223 | { |
75352e28 | 224 | gdb_assert (ptid != minus_one_ptid); |
24583e45 | 225 | switch_to_thread (find_thread_ptid (ptid)); |
043a4934 | 226 | } |
d092c5a2 | 227 | |
f24791b7 TBA |
228 | /* See gdbthread.h. */ |
229 | ||
230 | void | |
231 | switch_to_thread (thread_info *thread) | |
232 | { | |
7f8acede PA |
233 | if (thread != nullptr) |
234 | current_process_ = get_thread_process (thread); | |
235 | else | |
236 | current_process_ = nullptr; | |
f24791b7 TBA |
237 | current_thread = thread; |
238 | } | |
239 | ||
028a4603 PA |
240 | /* See inferiors.h. */ |
241 | ||
242 | void | |
243 | switch_to_process (process_info *proc) | |
244 | { | |
7f8acede PA |
245 | current_process_ = proc; |
246 | current_thread = nullptr; | |
028a4603 PA |
247 | } |
248 | ||
268a13a5 | 249 | /* See gdbsupport/common-inferior.h. */ |
d092c5a2 | 250 | |
11bd012e | 251 | const std::string & |
d092c5a2 SDJ |
252 | get_inferior_cwd () |
253 | { | |
254 | return current_inferior_cwd; | |
255 | } | |
bc3b087d | 256 | |
5b8bf2e7 | 257 | /* See inferiors.h. */ |
bc3b087d SDJ |
258 | |
259 | void | |
11bd012e | 260 | set_inferior_cwd (std::string cwd) |
bc3b087d | 261 | { |
11bd012e | 262 | current_inferior_cwd = std::move (cwd); |
bc3b087d | 263 | } |
f24791b7 TBA |
264 | |
265 | scoped_restore_current_thread::scoped_restore_current_thread () | |
266 | { | |
7f8acede | 267 | m_process = current_process_; |
f24791b7 TBA |
268 | m_thread = current_thread; |
269 | } | |
270 | ||
271 | scoped_restore_current_thread::~scoped_restore_current_thread () | |
272 | { | |
273 | if (m_dont_restore) | |
274 | return; | |
275 | ||
7f8acede PA |
276 | if (m_thread != nullptr) |
277 | switch_to_thread (m_thread); | |
278 | else | |
279 | switch_to_process (m_process); | |
f24791b7 | 280 | } |