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 AUTHORS ``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 AUTHORS 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: releng/10.3/gnu/usr.bin/gdb/kgdb/kthr.c 246893 2013-02-17 02:15:19Z marcel $"); 29 30#include <sys/param.h> 31#include <sys/cpuset.h> 32#include <sys/proc.h> 33#include <sys/types.h> 34#include <sys/signal.h> 35#include <err.h> 36#include <inttypes.h> 37#include <kvm.h> 38#include <stdio.h> 39#include <stdlib.h> 40#include <string.h> 41#include <unistd.h> 42 43#include <defs.h> 44#include <frame-unwind.h> 45 46#include "kgdb.h" 47 48static CORE_ADDR dumppcb; 49static int dumptid; 50 51static cpuset_t stopped_cpus; 52 53static struct kthr *first; 54struct kthr *curkthr; 55 56CORE_ADDR 57kgdb_lookup(const char *sym) 58{ 59 CORE_ADDR addr; 60 char *name; 61 62 asprintf(&name, "&%s", sym); 63 addr = kgdb_parse(name); 64 free(name); 65 return (addr); 66} 67 68struct kthr * 69kgdb_thr_first(void) 70{ 71 return (first); 72} 73 74static void 75kgdb_thr_add_procs(uintptr_t paddr) 76{ 77 struct proc p; 78 struct thread td; 79 struct kthr *kt; 80 CORE_ADDR addr; 81 82 while (paddr != 0) { 83 if (kvm_read(kvm, paddr, &p, sizeof(p)) != sizeof(p)) { 84 warnx("kvm_read: %s", kvm_geterr(kvm)); 85 break; 86 } 87 addr = (uintptr_t)TAILQ_FIRST(&p.p_threads); 88 while (addr != 0) { 89 if (kvm_read(kvm, addr, &td, sizeof(td)) != 90 sizeof(td)) { 91 warnx("kvm_read: %s", kvm_geterr(kvm)); 92 break; 93 } 94 kt = malloc(sizeof(*kt)); 95 kt->next = first; 96 kt->kaddr = addr; 97 if (td.td_tid == dumptid) 98 kt->pcb = dumppcb; 99 else if (td.td_state == TDS_RUNNING && 100 CPU_ISSET(td.td_oncpu, &stopped_cpus)) 101 kt->pcb = kgdb_trgt_core_pcb(td.td_oncpu); 102 else 103 kt->pcb = (uintptr_t)td.td_pcb; 104 kt->kstack = td.td_kstack; 105 kt->tid = td.td_tid; 106 kt->pid = p.p_pid; 107 kt->paddr = paddr; 108 kt->cpu = td.td_oncpu; 109 first = kt; 110 addr = (uintptr_t)TAILQ_NEXT(&td, td_plist); 111 } 112 paddr = (uintptr_t)LIST_NEXT(&p, p_list); 113 } 114} 115 116struct kthr * 117kgdb_thr_init(void) 118{ 119 long cpusetsize; 120 struct kthr *kt; 121 CORE_ADDR addr; 122 uintptr_t paddr; 123 124 while (first != NULL) { 125 kt = first; 126 first = kt->next; 127 free(kt); 128 } 129 130 addr = kgdb_lookup("allproc"); 131 if (addr == 0) 132 return (NULL); 133 kvm_read(kvm, addr, &paddr, sizeof(paddr)); 134 135 dumppcb = kgdb_lookup("dumppcb"); 136 if (dumppcb == 0) 137 return (NULL); 138 139 addr = kgdb_lookup("dumptid"); 140 if (addr != 0) 141 kvm_read(kvm, addr, &dumptid, sizeof(dumptid)); 142 else 143 dumptid = -1; 144 145 addr = kgdb_lookup("stopped_cpus"); 146 CPU_ZERO(&stopped_cpus); 147 cpusetsize = sysconf(_SC_CPUSET_SIZE); 148 if (cpusetsize != -1 && (u_long)cpusetsize <= sizeof(cpuset_t) && 149 addr != 0) 150 kvm_read(kvm, addr, &stopped_cpus, cpusetsize); 151 152 kgdb_thr_add_procs(paddr); 153 addr = kgdb_lookup("zombproc"); 154 if (addr != 0) { 155 kvm_read(kvm, addr, &paddr, sizeof(paddr)); 156 kgdb_thr_add_procs(paddr); 157 } 158 curkthr = kgdb_thr_lookup_tid(dumptid); 159 if (curkthr == NULL) 160 curkthr = first; 161 return (first); 162} 163 164struct kthr * 165kgdb_thr_lookup_tid(int tid) 166{ 167 struct kthr *kt; 168 169 kt = first; 170 while (kt != NULL && kt->tid != tid) 171 kt = kt->next; 172 return (kt); 173} 174 175struct kthr * 176kgdb_thr_lookup_taddr(uintptr_t taddr) 177{ 178 struct kthr *kt; 179 180 kt = first; 181 while (kt != NULL && kt->kaddr != taddr) 182 kt = kt->next; 183 return (kt); 184} 185 186struct kthr * 187kgdb_thr_lookup_pid(int pid) 188{ 189 struct kthr *kt; 190 191 kt = first; 192 while (kt != NULL && kt->pid != pid) 193 kt = kt->next; 194 return (kt); 195} 196 197struct kthr * 198kgdb_thr_lookup_paddr(uintptr_t paddr) 199{ 200 struct kthr *kt; 201 202 kt = first; 203 while (kt != NULL && kt->paddr != paddr) 204 kt = kt->next; 205 return (kt); 206} 207 208struct kthr * 209kgdb_thr_next(struct kthr *kt) 210{ 211 return (kt->next); 212} 213 214struct kthr * 215kgdb_thr_select(struct kthr *kt) 216{ 217 struct kthr *pcur; 218 219 pcur = curkthr; 220 curkthr = kt; 221 return (pcur); 222} 223 224char * 225kgdb_thr_extra_thread_info(int tid) 226{ 227 char comm[MAXCOMLEN + 1]; 228 char td_name[MAXCOMLEN + 1]; 229 struct kthr *kt; 230 struct proc *p; 231 struct thread *t; 232 static char buf[64]; 233 234 kt = kgdb_thr_lookup_tid(tid); 235 if (kt == NULL) 236 return (NULL); 237 snprintf(buf, sizeof(buf), "PID=%d", kt->pid); 238 p = (struct proc *)kt->paddr; 239 if (kvm_read(kvm, (uintptr_t)&p->p_comm[0], &comm, sizeof(comm)) != 240 sizeof(comm)) 241 return (buf); 242 strlcat(buf, ": ", sizeof(buf)); 243 strlcat(buf, comm, sizeof(buf)); 244 t = (struct thread *)kt->kaddr; 245 if (kvm_read(kvm, (uintptr_t)&t->td_name[0], &td_name, 246 sizeof(td_name)) == sizeof(td_name) && 247 strcmp(comm, td_name) != 0) { 248 strlcat(buf, "/", sizeof(buf)); 249 strlcat(buf, td_name, sizeof(buf)); 250 } 251 return (buf); 252} 253