kthr.c revision 167142
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 167142 2007-03-01 13:55:15Z kib $"); 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> 39132624Smarcel 40142151Skan#include <defs.h> 41149954Smarcel#include <frame-unwind.h> 42142151Skan 43132624Smarcel#include "kgdb.h" 44161621Sjhb#include <machine/pcb.h> 45132624Smarcel 46132624Smarcelstatic uintptr_t dumppcb; 47132624Smarcelstatic int dumptid; 48132624Smarcel 49161621Sjhbstatic uintptr_t stoppcbs; 50161621Sjhbstatic __cpumask_t stopped_cpus; 51161621Sjhb 52132624Smarcelstatic struct kthr *first; 53132624Smarcelstruct kthr *curkthr; 54132624Smarcel 55167142Skibuintptr_t 56167142Skibkgdb_lookup(const char *sym) 57132624Smarcel{ 58132624Smarcel struct nlist nl[2]; 59132624Smarcel 60132624Smarcel nl[0].n_name = (char *)(uintptr_t)sym; 61132624Smarcel nl[1].n_name = NULL; 62132624Smarcel if (kvm_nlist(kvm, nl) != 0) { 63132624Smarcel warnx("kvm_nlist(%s): %s", sym, kvm_geterr(kvm)); 64132624Smarcel return (0); 65132624Smarcel } 66132624Smarcel return (nl[0].n_value); 67132624Smarcel} 68132624Smarcel 69132624Smarcelstruct kthr * 70132624Smarcelkgdb_thr_first(void) 71132624Smarcel{ 72132624Smarcel return (first); 73132624Smarcel} 74132624Smarcel 75132624Smarcelstruct kthr * 76132624Smarcelkgdb_thr_init(void) 77132624Smarcel{ 78132624Smarcel struct proc p; 79132624Smarcel struct thread td; 80132624Smarcel struct kthr *kt; 81132624Smarcel uintptr_t addr, paddr; 82132624Smarcel 83167142Skib addr = kgdb_lookup("_allproc"); 84132624Smarcel if (addr == 0) 85132624Smarcel return (NULL); 86132624Smarcel kvm_read(kvm, addr, &paddr, sizeof(paddr)); 87132624Smarcel 88167142Skib dumppcb = kgdb_lookup("_dumppcb"); 89132624Smarcel if (dumppcb == 0) 90132624Smarcel return (NULL); 91132624Smarcel 92167142Skib addr = kgdb_lookup("_dumptid"); 93132624Smarcel if (addr != 0) 94132624Smarcel kvm_read(kvm, addr, &dumptid, sizeof(dumptid)); 95132624Smarcel else 96132624Smarcel dumptid = -1; 97132624Smarcel 98167142Skib addr = kgdb_lookup("_stopped_cpus"); 99161621Sjhb if (addr != 0) 100161621Sjhb kvm_read(kvm, addr, &stopped_cpus, sizeof(stopped_cpus)); 101161621Sjhb else 102161621Sjhb stopped_cpus = 0; 103161621Sjhb 104167142Skib stoppcbs = kgdb_lookup("_stoppcbs"); 105163440Sjhb 106132624Smarcel while (paddr != 0) { 107166214Srodrigc if (kvm_read(kvm, paddr, &p, sizeof(p)) != sizeof(p)) { 108132624Smarcel warnx("kvm_read: %s", kvm_geterr(kvm)); 109166214Srodrigc break; 110166214Srodrigc } 111132624Smarcel addr = (uintptr_t)TAILQ_FIRST(&p.p_threads); 112132624Smarcel while (addr != 0) { 113166214Srodrigc if (kvm_read(kvm, addr, &td, sizeof(td)) != 114166214Srodrigc sizeof(td)) { 115132624Smarcel warnx("kvm_read: %s", kvm_geterr(kvm)); 116166214Srodrigc break; 117166214Srodrigc } 118132624Smarcel kt = malloc(sizeof(*kt)); 119132624Smarcel kt->next = first; 120132624Smarcel kt->kaddr = addr; 121161621Sjhb if (td.td_tid == dumptid) 122161621Sjhb kt->pcb = dumppcb; 123161621Sjhb else if (td.td_state == TDS_RUNNING && ((1 << td.td_oncpu) & stopped_cpus) 124161621Sjhb && stoppcbs != 0) 125161621Sjhb kt->pcb = (uintptr_t) stoppcbs + sizeof(struct pcb) * td.td_oncpu; 126163440Sjhb else 127161621Sjhb kt->pcb = (uintptr_t)td.td_pcb; 128132624Smarcel kt->kstack = td.td_kstack; 129132624Smarcel kt->tid = td.td_tid; 130142151Skan kt->pid = p.p_pid; 131142151Skan kt->paddr = paddr; 132132624Smarcel first = kt; 133132624Smarcel addr = (uintptr_t)TAILQ_NEXT(&td, td_plist); 134132624Smarcel } 135132624Smarcel paddr = (uintptr_t)LIST_NEXT(&p, p_list); 136132624Smarcel } 137142151Skan curkthr = kgdb_thr_lookup_tid(dumptid); 138132624Smarcel if (curkthr == NULL) 139132624Smarcel curkthr = first; 140132624Smarcel return (first); 141132624Smarcel} 142132624Smarcel 143132624Smarcelstruct kthr * 144142151Skankgdb_thr_lookup_tid(int tid) 145132624Smarcel{ 146132624Smarcel struct kthr *kt; 147132624Smarcel 148132624Smarcel kt = first; 149132624Smarcel while (kt != NULL && kt->tid != tid) 150132624Smarcel kt = kt->next; 151132624Smarcel return (kt); 152132624Smarcel} 153132624Smarcel 154132624Smarcelstruct kthr * 155142151Skankgdb_thr_lookup_taddr(uintptr_t taddr) 156142151Skan{ 157142151Skan struct kthr *kt; 158142151Skan 159142151Skan kt = first; 160142151Skan while (kt != NULL && kt->kaddr != taddr) 161142151Skan kt = kt->next; 162142151Skan return (kt); 163142151Skan} 164142151Skan 165142151Skanstruct kthr * 166142151Skankgdb_thr_lookup_pid(int pid) 167142151Skan{ 168142151Skan struct kthr *kt; 169142151Skan 170142151Skan kt = first; 171142151Skan while (kt != NULL && kt->pid != pid) 172142151Skan kt = kt->next; 173142151Skan return (kt); 174142151Skan} 175142151Skan 176142151Skanstruct kthr * 177142151Skankgdb_thr_lookup_paddr(uintptr_t paddr) 178142151Skan{ 179142151Skan struct kthr *kt; 180142151Skan 181142151Skan kt = first; 182142151Skan while (kt != NULL && kt->paddr != paddr) 183142151Skan kt = kt->next; 184142151Skan return (kt); 185142151Skan} 186142151Skan 187142151Skanstruct kthr * 188132624Smarcelkgdb_thr_next(struct kthr *kt) 189132624Smarcel{ 190132624Smarcel return (kt->next); 191132624Smarcel} 192132624Smarcel 193132624Smarcelstruct kthr * 194132624Smarcelkgdb_thr_select(struct kthr *kt) 195132624Smarcel{ 196132624Smarcel struct kthr *pcur; 197132624Smarcel 198132624Smarcel pcur = curkthr; 199132624Smarcel curkthr = kt; 200132624Smarcel return (pcur); 201132624Smarcel} 202142151Skan 203142151Skanchar * 204142151Skankgdb_thr_extra_thread_info(int tid) 205142151Skan{ 206142151Skan struct kthr *kt; 207142151Skan struct proc *p; 208142151Skan static char comm[MAXCOMLEN + 1]; 209142151Skan 210142151Skan kt = kgdb_thr_lookup_tid(tid); 211142151Skan if (kt == NULL) 212142151Skan return (NULL); 213142151Skan p = (struct proc *)kt->paddr; 214142151Skan if (kvm_read(kvm, (uintptr_t)&p->p_comm[0], &comm, sizeof(comm)) != 215142151Skan sizeof(comm)) 216142151Skan return (NULL); 217142151Skan 218142151Skan return (comm); 219142151Skan} 220