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 pid_t pid; 45 46 pid = -1; 47 if (kdb_thread->td_proc != NULL) 48 pid = kdb_thread->td_proc->p_pid; 49 db_printf("[ thread pid %d tid %ld ]\n", pid, (long)kdb_thread->td_tid); 50 } 51 52 void 53 db_set_thread(db_expr_t tid, boolean_t hastid, db_expr_t cnt, char *mod) 54 { 55 struct thread *thr; 56 db_expr_t radix; 57 int err; 58 59 /* 60 * We parse our own arguments. We don't like the default radix. 61 */ 62 radix = db_radix; 63 db_radix = 10; 64 hastid = db_expression(&tid); 65 db_radix = radix; 66 db_skip_to_eol(); 67 68 if (hastid) { 69 thr = kdb_thr_lookup(tid); 70 if (thr != NULL) { 71 err = kdb_thr_select(thr); 72 if (err != 0) { 73 db_printf("unable to switch to thread %ld\n", 74 (long)thr->td_tid); 75 return; 76 } 77 db_dot = PC_REGS(); 78 } else { 79 db_printf("%d: invalid thread\n", (int)tid); 80 return; 81 } 82 } 83 84 db_print_thread(); 85 db_print_loc_and_inst(PC_REGS()); 86 } 87 88 void 89 db_show_threads(db_expr_t addr, boolean_t hasaddr, db_expr_t cnt, char *mod) 90 { 91 jmp_buf jb; 92 void *prev_jb; 93 struct thread *thr; 94 95 thr = kdb_thr_first(); 96 while (!db_pager_quit && thr != NULL) { 97 db_printf(" %6ld (%p) ", (long)thr->td_tid, thr); 98 prev_jb = kdb_jmpbuf(jb); 99 if (setjmp(jb) == 0) { 100 if (db_trace_thread(thr, 1) != 0) 101 db_printf("***\n"); 102 } 103 kdb_jmpbuf(prev_jb); 104 thr = kdb_thr_next(thr); 105 } 106 } 107 108 /* 109 * Lookup a thread based on a db expression address. We assume that the 110 * address was parsed in hexadecimal. We reparse the address in decimal 111 * first and try to treat it as a thread ID to find an associated thread. 112 * If that fails and check_pid is true, we terat the decimal value as a 113 * PID. If that matches a process, we return the first thread in that 114 * process. Otherwise, we treat the addr as a pointer to a thread. 115 */ 116 struct thread * 117 db_lookup_thread(db_expr_t addr, boolean_t check_pid) 118 { 119 struct thread *td; 120 db_expr_t decaddr; 121 struct proc *p; 122 123 /* 124 * If the parsed address was not a valid decimal expression, 125 * assume it is a thread pointer. 126 */ 127 decaddr = db_hex2dec(addr); 128 if (decaddr == -1) 129 return ((struct thread *)addr); 130 131 td = kdb_thr_lookup(decaddr); 132 if (td != NULL) 133 return (td); 134 if (check_pid) { 135 FOREACH_PROC_IN_SYSTEM(p) { 136 if (p->p_pid == decaddr) 137 return (FIRST_THREAD_IN_PROC(p)); 138 } 139 LIST_FOREACH(p, &zombproc, p_list) { 140 if (p->p_pid == decaddr) 141 return (FIRST_THREAD_IN_PROC(p)); 142 } 143 } 144 return ((struct thread *)addr); 145 } 146 147 /* 148 * Lookup a process based on a db expression address. We assume that the 149 * address was parsed in hexadecimal. We reparse the address in decimal 150 * first and try to treat it as a PID to find an associated process. 151 * If that fails we treat the addr as a pointer to a process. 152 */ 153 struct proc * 154 db_lookup_proc(db_expr_t addr) 155 { 156 db_expr_t decaddr; 157 struct proc *p; 158 159 decaddr = db_hex2dec(addr); 160 if (decaddr != -1) { 161 FOREACH_PROC_IN_SYSTEM(p) { 162 if (p->p_pid == decaddr) 163 return (p); 164 } 165 LIST_FOREACH(p, &zombproc, p_list) { 166 if (p->p_pid == decaddr) 167 return (p); 168 } 169 } 170 return ((struct proc *)addr); 171 } 172