1 /* Inferior process information for the remote server for GDB.
2 Copyright (C) 2002-2013 Free Software Foundation, Inc.
4 Contributed by MontaVista Software.
6 This file is part of GDB.
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
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
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.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
24 #include "gdbthread.h"
26 struct inferior_list all_processes;
27 struct inferior_list all_threads;
29 struct thread_info *current_inferior;
31 #define get_thread(inf) ((struct thread_info *)(inf))
34 add_inferior_to_list (struct inferior_list *list,
35 struct inferior_list_entry *new_inferior)
37 new_inferior->next = NULL;
38 if (list->tail != NULL)
39 list->tail->next = new_inferior;
41 list->head = new_inferior;
42 list->tail = new_inferior;
45 /* Invoke ACTION for each inferior in LIST. */
48 for_each_inferior (struct inferior_list *list,
49 void (*action) (struct inferior_list_entry *))
51 struct inferior_list_entry *cur = list->head, *next;
62 remove_inferior (struct inferior_list *list,
63 struct inferior_list_entry *entry)
65 struct inferior_list_entry **cur;
67 if (list->head == entry)
69 list->head = entry->next;
70 if (list->tail == entry)
71 list->tail = list->head;
76 while (*cur && (*cur)->next != entry)
82 (*cur)->next = entry->next;
84 if (list->tail == entry)
89 add_thread (ptid_t thread_id, void *target_data)
91 struct thread_info *new_thread = xmalloc (sizeof (*new_thread));
93 memset (new_thread, 0, sizeof (*new_thread));
95 new_thread->entry.id = thread_id;
96 new_thread->last_resume_kind = resume_continue;
97 new_thread->last_status.kind = TARGET_WAITKIND_IGNORE;
99 add_inferior_to_list (&all_threads, & new_thread->entry);
101 if (current_inferior == NULL)
102 current_inferior = new_thread;
104 new_thread->target_data = target_data;
108 thread_id_to_gdb_id (ptid_t thread_id)
110 struct inferior_list_entry *inf = all_threads.head;
114 if (ptid_equal (inf->id, thread_id))
123 thread_to_gdb_id (struct thread_info *thread)
125 return thread->entry.id;
129 find_thread_ptid (ptid_t ptid)
131 struct inferior_list_entry *inf = all_threads.head;
135 struct thread_info *thread = get_thread (inf);
136 if (ptid_equal (thread->entry.id, ptid))
145 gdb_id_to_thread_id (ptid_t gdb_id)
147 struct thread_info *thread = find_thread_ptid (gdb_id);
149 return thread ? thread->entry.id : null_ptid;
153 free_one_thread (struct inferior_list_entry *inf)
155 struct thread_info *thread = get_thread (inf);
156 free_register_cache (inferior_regcache_data (thread));
161 remove_thread (struct thread_info *thread)
163 if (thread->btrace != NULL)
164 target_disable_btrace (thread->btrace);
166 remove_inferior (&all_threads, (struct inferior_list_entry *) thread);
167 free_one_thread (&thread->entry);
170 /* Find the first inferior_list_entry E in LIST for which FUNC (E, ARG)
171 returns non-zero. If no entry is found then return NULL. */
173 struct inferior_list_entry *
174 find_inferior (struct inferior_list *list,
175 int (*func) (struct inferior_list_entry *, void *), void *arg)
177 struct inferior_list_entry *inf = list->head;
181 struct inferior_list_entry *next;
184 if ((*func) (inf, arg))
192 struct inferior_list_entry *
193 find_inferior_id (struct inferior_list *list, ptid_t id)
195 struct inferior_list_entry *inf = list->head;
199 if (ptid_equal (inf->id, id))
208 inferior_target_data (struct thread_info *inferior)
210 return inferior->target_data;
214 set_inferior_target_data (struct thread_info *inferior, void *data)
216 inferior->target_data = data;
220 inferior_regcache_data (struct thread_info *inferior)
222 return inferior->regcache_data;
226 set_inferior_regcache_data (struct thread_info *inferior, void *data)
228 inferior->regcache_data = data;
231 #define clear_list(LIST) \
232 do { (LIST)->head = (LIST)->tail = NULL; } while (0)
235 clear_inferiors (void)
237 for_each_inferior (&all_threads, free_one_thread);
238 clear_list (&all_threads);
242 current_inferior = NULL;
245 struct process_info *
246 add_process (int pid, int attached)
248 struct process_info *process;
250 process = xcalloc (1, sizeof (*process));
252 process->head.id = pid_to_ptid (pid);
253 process->attached = attached;
255 add_inferior_to_list (&all_processes, &process->head);
260 /* Remove a process from the common process list and free the memory
262 The caller is responsible for freeing private data first. */
265 remove_process (struct process_info *process)
267 clear_symbol_cache (&process->symbol_cache);
268 free_all_breakpoints (process);
269 remove_inferior (&all_processes, &process->head);
273 struct process_info *
274 find_process_pid (int pid)
276 return (struct process_info *)
277 find_inferior_id (&all_processes, pid_to_ptid (pid));
280 /* Return non-zero if INF, a struct process_info, was started by us,
281 i.e. not attached to. */
284 started_inferior_callback (struct inferior_list_entry *entry, void *args)
286 struct process_info *process = (struct process_info *) entry;
288 return ! process->attached;
291 /* Return non-zero if there are any inferiors that we have created
292 (as opposed to attached-to). */
295 have_started_inferiors_p (void)
297 return (find_inferior (&all_processes, started_inferior_callback, NULL)
301 /* Return non-zero if INF, a struct process_info, was attached to. */
304 attached_inferior_callback (struct inferior_list_entry *entry, void *args)
306 struct process_info *process = (struct process_info *) entry;
308 return process->attached;
311 /* Return non-zero if there are any inferiors that we have attached to. */
314 have_attached_inferiors_p (void)
316 return (find_inferior (&all_processes, attached_inferior_callback, NULL)
320 struct process_info *
321 get_thread_process (struct thread_info *thread)
323 int pid = ptid_get_pid (thread->entry.id);
324 return find_process_pid (pid);
327 struct process_info *
328 current_process (void)
330 if (current_inferior == NULL)
331 fatal ("Current inferior requested, but current_inferior is NULL\n");
333 return get_thread_process (current_inferior);