kthr.c revision 175452
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: head/gnu/usr.bin/gdb/kgdb/kthr.c 175452 2008-01-18 18:57:27Z emaste $"); 29132624Smarcel 30132624Smarcel#include <sys/param.h> 31132624Smarcel#include <sys/proc.h> 32132624Smarcel#include <sys/types.h> 33132624Smarcel#include <sys/signal.h> 34132624Smarcel#include <err.h> 35132624Smarcel#include <inttypes.h> 36132624Smarcel#include <kvm.h> 37132624Smarcel#include <stdio.h> 38132624Smarcel#include <stdlib.h> 39175452Semaste#include <string.h> 40132624Smarcel 41142151Skan#include <defs.h> 42149954Smarcel#include <frame-unwind.h> 43142151Skan 44132624Smarcel#include "kgdb.h" 45161621Sjhb#include <machine/pcb.h> 46132624Smarcel 47132624Smarcelstatic uintptr_t dumppcb; 48132624Smarcelstatic int dumptid; 49132624Smarcel 50161621Sjhbstatic uintptr_t stoppcbs; 51161621Sjhbstatic __cpumask_t stopped_cpus; 52161621Sjhb 53132624Smarcelstatic struct kthr *first; 54132624Smarcelstruct kthr *curkthr; 55132624Smarcel 56167142Skibuintptr_t 57167142Skibkgdb_lookup(const char *sym) 58132624Smarcel{ 59132624Smarcel struct nlist nl[2]; 60132624Smarcel 61132624Smarcel nl[0].n_name = (char *)(uintptr_t)sym; 62132624Smarcel nl[1].n_name = NULL; 63132624Smarcel if (kvm_nlist(kvm, nl) != 0) { 64132624Smarcel warnx("kvm_nlist(%s): %s", sym, kvm_geterr(kvm)); 65132624Smarcel return (0); 66132624Smarcel } 67132624Smarcel return (nl[0].n_value); 68132624Smarcel} 69132624Smarcel 70132624Smarcelstruct kthr * 71132624Smarcelkgdb_thr_first(void) 72132624Smarcel{ 73132624Smarcel return (first); 74132624Smarcel} 75132624Smarcel 76132624Smarcelstruct kthr * 77132624Smarcelkgdb_thr_init(void) 78132624Smarcel{ 79132624Smarcel struct proc p; 80132624Smarcel struct thread td; 81132624Smarcel struct kthr *kt; 82132624Smarcel uintptr_t addr, paddr; 83132624Smarcel 84167142Skib addr = kgdb_lookup("_allproc"); 85132624Smarcel if (addr == 0) 86132624Smarcel return (NULL); 87132624Smarcel kvm_read(kvm, addr, &paddr, sizeof(paddr)); 88132624Smarcel 89167142Skib dumppcb = kgdb_lookup("_dumppcb"); 90132624Smarcel if (dumppcb == 0) 91132624Smarcel return (NULL); 92132624Smarcel 93167142Skib addr = kgdb_lookup("_dumptid"); 94132624Smarcel if (addr != 0) 95132624Smarcel kvm_read(kvm, addr, &dumptid, sizeof(dumptid)); 96132624Smarcel else 97132624Smarcel dumptid = -1; 98132624Smarcel 99167142Skib addr = kgdb_lookup("_stopped_cpus"); 100161621Sjhb if (addr != 0) 101161621Sjhb kvm_read(kvm, addr, &stopped_cpus, sizeof(stopped_cpus)); 102161621Sjhb else 103161621Sjhb stopped_cpus = 0; 104161621Sjhb 105167142Skib stoppcbs = kgdb_lookup("_stoppcbs"); 106163440Sjhb 107132624Smarcel while (paddr != 0) { 108166214Srodrigc if (kvm_read(kvm, paddr, &p, sizeof(p)) != sizeof(p)) { 109132624Smarcel warnx("kvm_read: %s", kvm_geterr(kvm)); 110166214Srodrigc break; 111166214Srodrigc } 112132624Smarcel addr = (uintptr_t)TAILQ_FIRST(&p.p_threads); 113132624Smarcel while (addr != 0) { 114166214Srodrigc if (kvm_read(kvm, addr, &td, sizeof(td)) != 115166214Srodrigc sizeof(td)) { 116132624Smarcel warnx("kvm_read: %s", kvm_geterr(kvm)); 117166214Srodrigc break; 118166214Srodrigc } 119132624Smarcel kt = malloc(sizeof(*kt)); 120132624Smarcel kt->next = first; 121132624Smarcel kt->kaddr = addr; 122161621Sjhb if (td.td_tid == dumptid) 123161621Sjhb kt->pcb = dumppcb; 124161621Sjhb else if (td.td_state == TDS_RUNNING && ((1 << td.td_oncpu) & stopped_cpus) 125161621Sjhb && stoppcbs != 0) 126161621Sjhb kt->pcb = (uintptr_t) stoppcbs + sizeof(struct pcb) * td.td_oncpu; 127163440Sjhb else 128161621Sjhb kt->pcb = (uintptr_t)td.td_pcb; 129132624Smarcel kt->kstack = td.td_kstack; 130132624Smarcel kt->tid = td.td_tid; 131142151Skan kt->pid = p.p_pid; 132142151Skan kt->paddr = paddr; 133173681Sjhb kt->cpu = td.td_oncpu; 134132624Smarcel first = kt; 135132624Smarcel addr = (uintptr_t)TAILQ_NEXT(&td, td_plist); 136132624Smarcel } 137132624Smarcel paddr = (uintptr_t)LIST_NEXT(&p, p_list); 138132624Smarcel } 139142151Skan curkthr = kgdb_thr_lookup_tid(dumptid); 140132624Smarcel if (curkthr == NULL) 141132624Smarcel curkthr = first; 142132624Smarcel return (first); 143132624Smarcel} 144132624Smarcel 145132624Smarcelstruct kthr * 146142151Skankgdb_thr_lookup_tid(int tid) 147132624Smarcel{ 148132624Smarcel struct kthr *kt; 149132624Smarcel 150132624Smarcel kt = first; 151132624Smarcel while (kt != NULL && kt->tid != tid) 152132624Smarcel kt = kt->next; 153132624Smarcel return (kt); 154132624Smarcel} 155132624Smarcel 156132624Smarcelstruct kthr * 157142151Skankgdb_thr_lookup_taddr(uintptr_t taddr) 158142151Skan{ 159142151Skan struct kthr *kt; 160142151Skan 161142151Skan kt = first; 162142151Skan while (kt != NULL && kt->kaddr != taddr) 163142151Skan kt = kt->next; 164142151Skan return (kt); 165142151Skan} 166142151Skan 167142151Skanstruct kthr * 168142151Skankgdb_thr_lookup_pid(int pid) 169142151Skan{ 170142151Skan struct kthr *kt; 171142151Skan 172142151Skan kt = first; 173142151Skan while (kt != NULL && kt->pid != pid) 174142151Skan kt = kt->next; 175142151Skan return (kt); 176142151Skan} 177142151Skan 178142151Skanstruct kthr * 179142151Skankgdb_thr_lookup_paddr(uintptr_t paddr) 180142151Skan{ 181142151Skan struct kthr *kt; 182142151Skan 183142151Skan kt = first; 184142151Skan while (kt != NULL && kt->paddr != paddr) 185142151Skan kt = kt->next; 186142151Skan return (kt); 187142151Skan} 188142151Skan 189142151Skanstruct kthr * 190132624Smarcelkgdb_thr_next(struct kthr *kt) 191132624Smarcel{ 192132624Smarcel return (kt->next); 193132624Smarcel} 194132624Smarcel 195132624Smarcelstruct kthr * 196132624Smarcelkgdb_thr_select(struct kthr *kt) 197132624Smarcel{ 198132624Smarcel struct kthr *pcur; 199132624Smarcel 200132624Smarcel pcur = curkthr; 201132624Smarcel curkthr = kt; 202132624Smarcel return (pcur); 203132624Smarcel} 204142151Skan 205142151Skanchar * 206142151Skankgdb_thr_extra_thread_info(int tid) 207142151Skan{ 208175452Semaste char comm[MAXCOMLEN + 1]; 209175452Semaste char td_name[MAXCOMLEN + 1]; 210142151Skan struct kthr *kt; 211142151Skan struct proc *p; 212175452Semaste struct thread *t; 213175452Semaste static char info[MAXCOMLEN + 1 + MAXCOMLEN + 1]; 214142151Skan 215142151Skan kt = kgdb_thr_lookup_tid(tid); 216142151Skan if (kt == NULL) 217142151Skan return (NULL); 218142151Skan p = (struct proc *)kt->paddr; 219175452Semaste t = (struct thread *)kt->kaddr; 220142151Skan if (kvm_read(kvm, (uintptr_t)&p->p_comm[0], &comm, sizeof(comm)) != 221142151Skan sizeof(comm)) 222142151Skan return (NULL); 223175452Semaste if (kvm_read(kvm, (uintptr_t)&t->td_name[0], &td_name, 224175452Semaste sizeof(td_name)) == sizeof(td_name) && 225175452Semaste strcmp(comm, td_name) != 0) 226175452Semaste snprintf(info, sizeof(info), "%s/%s", comm, td_name); 227175452Semaste else 228175452Semaste strlcpy(info, comm, sizeof(info)); 229175452Semaste return (info); 230142151Skan} 231