1132624Smarcel/* 2132624Smarcel * Copyright (c) 2004 Marcel Moolenaar 3132624Smarcel * All rights reserved. 4132624Smarcel * 5132624Smarcel * Redistribution and use in source and binary forms, with or without 6132624Smarcel * modification, are permitted provided that the following conditions 7132624Smarcel * are met: 8132624Smarcel * 9132624Smarcel * 1. Redistributions of source code must retain the above copyright 10132624Smarcel * notice, this list of conditions and the following disclaimer. 11132624Smarcel * 2. Redistributions in binary form must reproduce the above copyright 12132624Smarcel * notice, this list of conditions and the following disclaimer in the 13132624Smarcel * documentation and/or other materials provided with the distribution. 14132624Smarcel * 15132624Smarcel * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR 16132624Smarcel * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17132624Smarcel * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18132624Smarcel * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, 19132624Smarcel * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20132624Smarcel * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21132624Smarcel * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22132624Smarcel * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23132624Smarcel * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24132624Smarcel * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25132624Smarcel */ 26132624Smarcel 27132624Smarcel#include <sys/cdefs.h> 28132624Smarcel__FBSDID("$FreeBSD: releng/11.0/gnu/usr.bin/gdb/kgdb/kthr.c 275644 2014-12-09 14:21:43Z dchagin $"); 29132624Smarcel 30132624Smarcel#include <sys/param.h> 31222813Sattilio#include <sys/cpuset.h> 32132624Smarcel#include <sys/proc.h> 33132624Smarcel#include <sys/types.h> 34132624Smarcel#include <sys/signal.h> 35132624Smarcel#include <err.h> 36132624Smarcel#include <inttypes.h> 37132624Smarcel#include <kvm.h> 38132624Smarcel#include <stdio.h> 39132624Smarcel#include <stdlib.h> 40175452Semaste#include <string.h> 41222813Sattilio#include <unistd.h> 42132624Smarcel 43142151Skan#include <defs.h> 44149954Smarcel#include <frame-unwind.h> 45142151Skan 46132624Smarcel#include "kgdb.h" 47132624Smarcel 48210852Sjhbstatic CORE_ADDR dumppcb; 49132624Smarcelstatic int dumptid; 50132624Smarcel 51222813Sattiliostatic cpuset_t stopped_cpus; 52161621Sjhb 53132624Smarcelstatic struct kthr *first; 54132624Smarcelstruct kthr *curkthr; 55132624Smarcel 56210852SjhbCORE_ADDR 57167142Skibkgdb_lookup(const char *sym) 58132624Smarcel{ 59210852Sjhb CORE_ADDR addr; 60210852Sjhb char *name; 61132624Smarcel 62210852Sjhb asprintf(&name, "&%s", sym); 63210852Sjhb addr = kgdb_parse(name); 64210852Sjhb free(name); 65210852Sjhb return (addr); 66132624Smarcel} 67132624Smarcel 68132624Smarcelstruct kthr * 69132624Smarcelkgdb_thr_first(void) 70132624Smarcel{ 71132624Smarcel return (first); 72132624Smarcel} 73132624Smarcel 74225017Sjhbstatic void 75225017Sjhbkgdb_thr_add_procs(uintptr_t paddr) 76225017Sjhb{ 77225017Sjhb struct proc p; 78225017Sjhb struct thread td; 79225017Sjhb struct kthr *kt; 80225017Sjhb CORE_ADDR addr; 81225017Sjhb 82225017Sjhb while (paddr != 0) { 83225017Sjhb if (kvm_read(kvm, paddr, &p, sizeof(p)) != sizeof(p)) { 84225017Sjhb warnx("kvm_read: %s", kvm_geterr(kvm)); 85225017Sjhb break; 86225017Sjhb } 87225017Sjhb addr = (uintptr_t)TAILQ_FIRST(&p.p_threads); 88225017Sjhb while (addr != 0) { 89225017Sjhb if (kvm_read(kvm, addr, &td, sizeof(td)) != 90225017Sjhb sizeof(td)) { 91225017Sjhb warnx("kvm_read: %s", kvm_geterr(kvm)); 92225017Sjhb break; 93225017Sjhb } 94225017Sjhb kt = malloc(sizeof(*kt)); 95225017Sjhb kt->next = first; 96225017Sjhb kt->kaddr = addr; 97225017Sjhb if (td.td_tid == dumptid) 98225017Sjhb kt->pcb = dumppcb; 99275644Sdchagin else if (td.td_oncpu != NOCPU && 100225017Sjhb CPU_ISSET(td.td_oncpu, &stopped_cpus)) 101246893Smarcel kt->pcb = kgdb_trgt_core_pcb(td.td_oncpu); 102225017Sjhb else 103225017Sjhb kt->pcb = (uintptr_t)td.td_pcb; 104225017Sjhb kt->kstack = td.td_kstack; 105225017Sjhb kt->tid = td.td_tid; 106225017Sjhb kt->pid = p.p_pid; 107225017Sjhb kt->paddr = paddr; 108225017Sjhb kt->cpu = td.td_oncpu; 109225017Sjhb first = kt; 110225017Sjhb addr = (uintptr_t)TAILQ_NEXT(&td, td_plist); 111225017Sjhb } 112225017Sjhb paddr = (uintptr_t)LIST_NEXT(&p, p_list); 113225017Sjhb } 114225017Sjhb} 115225017Sjhb 116132624Smarcelstruct kthr * 117132624Smarcelkgdb_thr_init(void) 118132624Smarcel{ 119222813Sattilio long cpusetsize; 120132624Smarcel struct kthr *kt; 121210852Sjhb CORE_ADDR addr; 122210852Sjhb uintptr_t paddr; 123178670Sjhb 124178670Sjhb while (first != NULL) { 125178670Sjhb kt = first; 126178670Sjhb first = kt->next; 127178670Sjhb free(kt); 128178670Sjhb } 129132624Smarcel 130210852Sjhb addr = kgdb_lookup("allproc"); 131210852Sjhb if (addr == 0) 132132624Smarcel return (NULL); 133132624Smarcel kvm_read(kvm, addr, &paddr, sizeof(paddr)); 134132624Smarcel 135210852Sjhb dumppcb = kgdb_lookup("dumppcb"); 136210852Sjhb if (dumppcb == 0) 137132624Smarcel return (NULL); 138132624Smarcel 139210852Sjhb addr = kgdb_lookup("dumptid"); 140132624Smarcel if (addr != 0) 141132624Smarcel kvm_read(kvm, addr, &dumptid, sizeof(dumptid)); 142132624Smarcel else 143132624Smarcel dumptid = -1; 144132624Smarcel 145210852Sjhb addr = kgdb_lookup("stopped_cpus"); 146222813Sattilio CPU_ZERO(&stopped_cpus); 147222813Sattilio cpusetsize = sysconf(_SC_CPUSET_SIZE); 148222813Sattilio if (cpusetsize != -1 && (u_long)cpusetsize <= sizeof(cpuset_t) && 149222813Sattilio addr != 0) 150222813Sattilio kvm_read(kvm, addr, &stopped_cpus, cpusetsize); 151161621Sjhb 152225017Sjhb kgdb_thr_add_procs(paddr); 153225017Sjhb addr = kgdb_lookup("zombproc"); 154225017Sjhb if (addr != 0) { 155225017Sjhb kvm_read(kvm, addr, &paddr, sizeof(paddr)); 156225017Sjhb kgdb_thr_add_procs(paddr); 157132624Smarcel } 158142151Skan curkthr = kgdb_thr_lookup_tid(dumptid); 159132624Smarcel if (curkthr == NULL) 160132624Smarcel curkthr = first; 161132624Smarcel return (first); 162132624Smarcel} 163132624Smarcel 164132624Smarcelstruct kthr * 165142151Skankgdb_thr_lookup_tid(int tid) 166132624Smarcel{ 167132624Smarcel struct kthr *kt; 168132624Smarcel 169132624Smarcel kt = first; 170132624Smarcel while (kt != NULL && kt->tid != tid) 171132624Smarcel kt = kt->next; 172132624Smarcel return (kt); 173132624Smarcel} 174132624Smarcel 175132624Smarcelstruct kthr * 176142151Skankgdb_thr_lookup_taddr(uintptr_t taddr) 177142151Skan{ 178142151Skan struct kthr *kt; 179142151Skan 180142151Skan kt = first; 181142151Skan while (kt != NULL && kt->kaddr != taddr) 182142151Skan kt = kt->next; 183142151Skan return (kt); 184142151Skan} 185142151Skan 186142151Skanstruct kthr * 187142151Skankgdb_thr_lookup_pid(int pid) 188142151Skan{ 189142151Skan struct kthr *kt; 190142151Skan 191142151Skan kt = first; 192142151Skan while (kt != NULL && kt->pid != pid) 193142151Skan kt = kt->next; 194142151Skan return (kt); 195142151Skan} 196142151Skan 197142151Skanstruct kthr * 198142151Skankgdb_thr_lookup_paddr(uintptr_t paddr) 199142151Skan{ 200142151Skan struct kthr *kt; 201142151Skan 202142151Skan kt = first; 203142151Skan while (kt != NULL && kt->paddr != paddr) 204142151Skan kt = kt->next; 205142151Skan return (kt); 206142151Skan} 207142151Skan 208142151Skanstruct kthr * 209132624Smarcelkgdb_thr_next(struct kthr *kt) 210132624Smarcel{ 211132624Smarcel return (kt->next); 212132624Smarcel} 213132624Smarcel 214132624Smarcelstruct kthr * 215132624Smarcelkgdb_thr_select(struct kthr *kt) 216132624Smarcel{ 217132624Smarcel struct kthr *pcur; 218132624Smarcel 219132624Smarcel pcur = curkthr; 220132624Smarcel curkthr = kt; 221132624Smarcel return (pcur); 222132624Smarcel} 223142151Skan 224142151Skanchar * 225142151Skankgdb_thr_extra_thread_info(int tid) 226142151Skan{ 227175452Semaste char comm[MAXCOMLEN + 1]; 228175452Semaste char td_name[MAXCOMLEN + 1]; 229142151Skan struct kthr *kt; 230142151Skan struct proc *p; 231175452Semaste struct thread *t; 232178713Sjhb static char buf[64]; 233142151Skan 234142151Skan kt = kgdb_thr_lookup_tid(tid); 235142151Skan if (kt == NULL) 236178713Sjhb return (NULL); 237178713Sjhb snprintf(buf, sizeof(buf), "PID=%d", kt->pid); 238142151Skan p = (struct proc *)kt->paddr; 239142151Skan if (kvm_read(kvm, (uintptr_t)&p->p_comm[0], &comm, sizeof(comm)) != 240142151Skan sizeof(comm)) 241178713Sjhb return (buf); 242178713Sjhb strlcat(buf, ": ", sizeof(buf)); 243178713Sjhb strlcat(buf, comm, sizeof(buf)); 244178713Sjhb t = (struct thread *)kt->kaddr; 245175452Semaste if (kvm_read(kvm, (uintptr_t)&t->td_name[0], &td_name, 246175452Semaste sizeof(td_name)) == sizeof(td_name) && 247178713Sjhb strcmp(comm, td_name) != 0) { 248178713Sjhb strlcat(buf, "/", sizeof(buf)); 249178713Sjhb strlcat(buf, td_name, sizeof(buf)); 250178713Sjhb } 251178713Sjhb return (buf); 252142151Skan} 253