kthr.c revision 149954
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 149954 2005-09-10 18:25:53Z marcel $"); 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" 44132624Smarcel 45132624Smarcelstatic uintptr_t dumppcb; 46132624Smarcelstatic int dumptid; 47132624Smarcel 48132624Smarcelstatic struct kthr *first; 49132624Smarcelstruct kthr *curkthr; 50132624Smarcel 51132624Smarcelstatic uintptr_t 52132624Smarcellookup(const char *sym) 53132624Smarcel{ 54132624Smarcel struct nlist nl[2]; 55132624Smarcel 56132624Smarcel nl[0].n_name = (char *)(uintptr_t)sym; 57132624Smarcel nl[1].n_name = NULL; 58132624Smarcel if (kvm_nlist(kvm, nl) != 0) { 59132624Smarcel warnx("kvm_nlist(%s): %s", sym, kvm_geterr(kvm)); 60132624Smarcel return (0); 61132624Smarcel } 62132624Smarcel return (nl[0].n_value); 63132624Smarcel} 64132624Smarcel 65132624Smarcelstruct kthr * 66132624Smarcelkgdb_thr_first(void) 67132624Smarcel{ 68132624Smarcel return (first); 69132624Smarcel} 70132624Smarcel 71132624Smarcelstruct kthr * 72132624Smarcelkgdb_thr_init(void) 73132624Smarcel{ 74132624Smarcel struct proc p; 75132624Smarcel struct thread td; 76132624Smarcel struct kthr *kt; 77132624Smarcel uintptr_t addr, paddr; 78132624Smarcel 79132624Smarcel addr = lookup("_allproc"); 80132624Smarcel if (addr == 0) 81132624Smarcel return (NULL); 82132624Smarcel kvm_read(kvm, addr, &paddr, sizeof(paddr)); 83132624Smarcel 84132624Smarcel dumppcb = lookup("_dumppcb"); 85132624Smarcel if (dumppcb == 0) 86132624Smarcel return (NULL); 87132624Smarcel 88132624Smarcel addr = lookup("_dumptid"); 89132624Smarcel if (addr != 0) 90132624Smarcel kvm_read(kvm, addr, &dumptid, sizeof(dumptid)); 91132624Smarcel else 92132624Smarcel dumptid = -1; 93132624Smarcel 94132624Smarcel while (paddr != 0) { 95132624Smarcel if (kvm_read(kvm, paddr, &p, sizeof(p)) != sizeof(p)) 96132624Smarcel warnx("kvm_read: %s", kvm_geterr(kvm)); 97132624Smarcel addr = (uintptr_t)TAILQ_FIRST(&p.p_threads); 98132624Smarcel while (addr != 0) { 99132624Smarcel if (kvm_read(kvm, addr, &td, sizeof(td)) != sizeof(td)) 100132624Smarcel warnx("kvm_read: %s", kvm_geterr(kvm)); 101132624Smarcel kt = malloc(sizeof(*kt)); 102132624Smarcel kt->next = first; 103132624Smarcel kt->kaddr = addr; 104132624Smarcel kt->pcb = (td.td_tid == dumptid) ? dumppcb : 105132624Smarcel (uintptr_t)td.td_pcb; 106132624Smarcel kt->kstack = td.td_kstack; 107132624Smarcel kt->tid = td.td_tid; 108142151Skan kt->pid = p.p_pid; 109142151Skan kt->paddr = paddr; 110132624Smarcel first = kt; 111132624Smarcel addr = (uintptr_t)TAILQ_NEXT(&td, td_plist); 112132624Smarcel } 113132624Smarcel paddr = (uintptr_t)LIST_NEXT(&p, p_list); 114132624Smarcel } 115142151Skan curkthr = kgdb_thr_lookup_tid(dumptid); 116132624Smarcel if (curkthr == NULL) 117132624Smarcel curkthr = first; 118132624Smarcel return (first); 119132624Smarcel} 120132624Smarcel 121132624Smarcelstruct kthr * 122142151Skankgdb_thr_lookup_tid(int tid) 123132624Smarcel{ 124132624Smarcel struct kthr *kt; 125132624Smarcel 126132624Smarcel kt = first; 127132624Smarcel while (kt != NULL && kt->tid != tid) 128132624Smarcel kt = kt->next; 129132624Smarcel return (kt); 130132624Smarcel} 131132624Smarcel 132132624Smarcelstruct kthr * 133142151Skankgdb_thr_lookup_taddr(uintptr_t taddr) 134142151Skan{ 135142151Skan struct kthr *kt; 136142151Skan 137142151Skan kt = first; 138142151Skan while (kt != NULL && kt->kaddr != taddr) 139142151Skan kt = kt->next; 140142151Skan return (kt); 141142151Skan} 142142151Skan 143142151Skanstruct kthr * 144142151Skankgdb_thr_lookup_pid(int pid) 145142151Skan{ 146142151Skan struct kthr *kt; 147142151Skan 148142151Skan kt = first; 149142151Skan while (kt != NULL && kt->pid != pid) 150142151Skan kt = kt->next; 151142151Skan return (kt); 152142151Skan} 153142151Skan 154142151Skanstruct kthr * 155142151Skankgdb_thr_lookup_paddr(uintptr_t paddr) 156142151Skan{ 157142151Skan struct kthr *kt; 158142151Skan 159142151Skan kt = first; 160142151Skan while (kt != NULL && kt->paddr != paddr) 161142151Skan kt = kt->next; 162142151Skan return (kt); 163142151Skan} 164142151Skan 165142151Skanstruct kthr * 166132624Smarcelkgdb_thr_next(struct kthr *kt) 167132624Smarcel{ 168132624Smarcel return (kt->next); 169132624Smarcel} 170132624Smarcel 171132624Smarcelstruct kthr * 172132624Smarcelkgdb_thr_select(struct kthr *kt) 173132624Smarcel{ 174132624Smarcel struct kthr *pcur; 175132624Smarcel 176132624Smarcel pcur = curkthr; 177132624Smarcel curkthr = kt; 178132624Smarcel return (pcur); 179132624Smarcel} 180142151Skan 181142151Skanchar * 182142151Skankgdb_thr_extra_thread_info(int tid) 183142151Skan{ 184142151Skan struct kthr *kt; 185142151Skan struct proc *p; 186142151Skan static char comm[MAXCOMLEN + 1]; 187142151Skan 188142151Skan kt = kgdb_thr_lookup_tid(tid); 189142151Skan if (kt == NULL) 190142151Skan return (NULL); 191142151Skan p = (struct proc *)kt->paddr; 192142151Skan if (kvm_read(kvm, (uintptr_t)&p->p_comm[0], &comm, sizeof(comm)) != 193142151Skan sizeof(comm)) 194142151Skan return (NULL); 195142151Skan 196142151Skan return (comm); 197142151Skan} 198