1 /* Multi-process/thread control for GDB, the GNU debugger.
2 Copyright 1986, 1987, 1988, 1993
4 Contributed by Lynx Real-Time Systems, Inc. Los Gatos, CA.
5 Free Software Foundation, Inc.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
33 #include <sys/types.h>
36 /*#include "lynxos-core.h"*/
40 struct thread_info
*next
;
41 int pid
; /* Actual process id */
42 int num
; /* Convenient handle */
45 static struct thread_info
*thread_list
= NULL
;
46 static int highest_thread_num
;
48 static void thread_command
PARAMS ((char * tidstr
, int from_tty
));
50 static void prune_threads
PARAMS ((void));
52 static void thread_switch
PARAMS ((int pid
));
54 static struct thread_info
* find_thread_id
PARAMS ((int num
));
59 struct thread_info
*tp
, *tpnext
;
64 for (tp
= thread_list
; tp
; tp
= tpnext
)
71 highest_thread_num
= 0;
78 struct thread_info
*tp
;
80 tp
= (struct thread_info
*) xmalloc (sizeof (struct thread_info
));
83 tp
->num
= ++highest_thread_num
;
84 tp
->next
= thread_list
;
88 static struct thread_info
*
92 struct thread_info
*tp
;
94 for (tp
= thread_list
; tp
; tp
= tp
->next
)
102 valid_thread_id (num
)
105 struct thread_info
*tp
;
107 for (tp
= thread_list
; tp
; tp
= tp
->next
)
115 pid_to_thread_id (pid
)
118 struct thread_info
*tp
;
120 for (tp
= thread_list
; tp
; tp
= tp
->next
)
131 struct thread_info
*tp
;
133 for (tp
= thread_list
; tp
; tp
= tp
->next
)
137 return 0; /* Never heard of 'im */
143 struct thread_info
*tp
, *tpprev
;
147 for (tp
= thread_list
; tp
; tp
= tp
->next
)
151 tpprev
->next
= tp
->next
;
161 /* Print information about currently known threads */
164 info_threads_command (arg
, from_tty
)
168 struct thread_info
*tp
;
169 int current_pid
= inferior_pid
;
171 for (tp
= thread_list
; tp
; tp
= tp
->next
)
173 if (target_has_execution
174 && kill (tp
->pid
, 0) == -1)
176 tp
->pid
= -1; /* Mark it as dead */
180 if (tp
->pid
== current_pid
)
181 printf_filtered ("* ");
183 printf_filtered (" ");
185 printf_filtered ("%d %s ", tp
->num
, target_pid_to_str (tp
->pid
));
187 thread_switch (tp
->pid
);
188 print_stack_frame (selected_frame
, -1, 0);
191 thread_switch (current_pid
);
195 /* Switch from one thread to another. */
201 if (pid
== inferior_pid
)
205 flush_cached_frames ();
206 registers_changed ();
208 set_current_frame (create_new_frame (read_fp (), stop_pc
));
209 stop_frame_address
= FRAME_FP (get_current_frame ());
210 select_frame (get_current_frame (), 0);
214 thread_command (tidstr
, from_tty
)
219 struct thread_info
*tp
;
222 error ("Please specify a thread ID. Use the \"info threads\" command to\n\
223 see the IDs of currently known threads.");
228 tp
= find_thread_id (num
);
231 error ("Thread ID %d not known. Use the \"info threads\" command to\n\
232 see the IDs of currently known threads.", num
);
234 thread_switch (tp
->pid
);
236 printf_filtered ("[Switching to %s]\n", target_pid_to_str (inferior_pid
));
237 print_stack_frame (selected_frame
, selected_frame_level
, 1);
241 _initialize_thread ()
243 add_info ("threads", info_threads_command
,
244 "IDs of currently known threads.");
245 add_com ("thread", class_info
, thread_command
,
246 "Use this command to switch between threads.\n\
247 The new thread ID must be currently known.");
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