xref: /freebsd/sys/ddb/db_thread.c (revision 74bf4e164ba5851606a27d4feff27717452583e5)
1 /*
2  * Copyright (c) 2004 Marcel Moolenaar
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  *
9  * 1. Redistributions of source code must retain the above copyright
10  *    notice, this list of conditions and the following disclaimer.
11  * 2. Redistributions in binary form must reproduce the above copyright
12  *    notice, this list of conditions and the following disclaimer in the
13  *    documentation and/or other materials provided with the distribution.
14  *
15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25  */
26 
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
29 
30 #include <sys/param.h>
31 #include <sys/systm.h>
32 #include <sys/kdb.h>
33 #include <sys/proc.h>
34 
35 #include <machine/pcb.h>
36 
37 #include <ddb/ddb.h>
38 #include <ddb/db_command.h>
39 #include <ddb/db_sym.h>
40 
41 void
42 db_print_thread(void)
43 {
44 	db_printf("[thread %ld]\n", (long)kdb_thread->td_tid);
45 }
46 
47 void
48 db_set_thread(db_expr_t tid, boolean_t hastid, db_expr_t cnt, char *mod)
49 {
50 	struct thread *thr;
51 	db_expr_t radix;
52 	int err;
53 
54 	/*
55 	 * We parse our own arguments. We don't like the default radix.
56 	 */
57 	radix = db_radix;
58 	db_radix = 10;
59 	hastid = db_expression(&tid);
60 	db_radix = radix;
61 	db_skip_to_eol();
62 
63 	if (hastid) {
64 		thr = kdb_thr_lookup(tid);
65 		if (thr != NULL) {
66 			err = kdb_thr_select(thr);
67 			if (err != 0) {
68 				db_printf("unable to switch to thread %ld\n",
69 				    (long)thr->td_tid);
70 				return;
71 			}
72 			db_dot = PC_REGS();
73 		} else {
74 			db_printf("%d: invalid thread\n", (int)tid);
75 			return;
76 		}
77 	}
78 
79 	db_print_thread();
80 	db_print_loc_and_inst(PC_REGS());
81 }
82 
83 void
84 db_show_threads(db_expr_t addr, boolean_t hasaddr, db_expr_t cnt, char *mod)
85 {
86 	jmp_buf jb;
87 	void *prev_jb;
88 	struct thread *thr;
89 	int pager_quit;
90 
91 	db_setup_paging(db_simple_pager, &pager_quit, DB_LINES_PER_PAGE);
92 
93 	pager_quit = 0;
94 	thr = kdb_thr_first();
95 	while (!pager_quit && thr != NULL) {
96 		db_printf("  %6ld (%p)  ", (long)thr->td_tid, thr);
97 		prev_jb = kdb_jmpbuf(jb);
98 		if (setjmp(jb) == 0) {
99 			if (db_trace_thread(thr, 1) != 0)
100 				db_printf("***\n");
101 		}
102 		kdb_jmpbuf(prev_jb);
103 		thr = kdb_thr_next(thr);
104 	}
105 }
106