td_oncpu is NOCPU for thread in TDS_RUNNING state. Differential Revision: https://reviews.freebsd.org/D1283 Reviewed by: jhb MFC after: 1 Month
253 lines
5.5 KiB
C
253 lines
5.5 KiB
C
/*
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* Copyright (c) 2004 Marcel Moolenaar
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/cpuset.h>
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#include <sys/proc.h>
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#include <sys/types.h>
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#include <sys/signal.h>
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#include <err.h>
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#include <inttypes.h>
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#include <kvm.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <defs.h>
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#include <frame-unwind.h>
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#include "kgdb.h"
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static CORE_ADDR dumppcb;
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static int dumptid;
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static cpuset_t stopped_cpus;
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static struct kthr *first;
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struct kthr *curkthr;
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CORE_ADDR
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kgdb_lookup(const char *sym)
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{
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CORE_ADDR addr;
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char *name;
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asprintf(&name, "&%s", sym);
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addr = kgdb_parse(name);
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free(name);
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return (addr);
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}
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struct kthr *
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kgdb_thr_first(void)
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{
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return (first);
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}
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static void
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kgdb_thr_add_procs(uintptr_t paddr)
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{
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struct proc p;
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struct thread td;
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struct kthr *kt;
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CORE_ADDR addr;
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while (paddr != 0) {
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if (kvm_read(kvm, paddr, &p, sizeof(p)) != sizeof(p)) {
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warnx("kvm_read: %s", kvm_geterr(kvm));
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break;
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}
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addr = (uintptr_t)TAILQ_FIRST(&p.p_threads);
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while (addr != 0) {
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if (kvm_read(kvm, addr, &td, sizeof(td)) !=
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sizeof(td)) {
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warnx("kvm_read: %s", kvm_geterr(kvm));
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break;
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}
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kt = malloc(sizeof(*kt));
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kt->next = first;
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kt->kaddr = addr;
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if (td.td_tid == dumptid)
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kt->pcb = dumppcb;
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else if (td.td_oncpu != NOCPU &&
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CPU_ISSET(td.td_oncpu, &stopped_cpus))
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kt->pcb = kgdb_trgt_core_pcb(td.td_oncpu);
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else
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kt->pcb = (uintptr_t)td.td_pcb;
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kt->kstack = td.td_kstack;
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kt->tid = td.td_tid;
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kt->pid = p.p_pid;
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kt->paddr = paddr;
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kt->cpu = td.td_oncpu;
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first = kt;
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addr = (uintptr_t)TAILQ_NEXT(&td, td_plist);
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}
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paddr = (uintptr_t)LIST_NEXT(&p, p_list);
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}
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}
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struct kthr *
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kgdb_thr_init(void)
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{
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long cpusetsize;
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struct kthr *kt;
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CORE_ADDR addr;
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uintptr_t paddr;
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while (first != NULL) {
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kt = first;
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first = kt->next;
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free(kt);
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}
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addr = kgdb_lookup("allproc");
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if (addr == 0)
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return (NULL);
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kvm_read(kvm, addr, &paddr, sizeof(paddr));
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dumppcb = kgdb_lookup("dumppcb");
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if (dumppcb == 0)
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return (NULL);
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addr = kgdb_lookup("dumptid");
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if (addr != 0)
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kvm_read(kvm, addr, &dumptid, sizeof(dumptid));
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else
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dumptid = -1;
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addr = kgdb_lookup("stopped_cpus");
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CPU_ZERO(&stopped_cpus);
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cpusetsize = sysconf(_SC_CPUSET_SIZE);
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if (cpusetsize != -1 && (u_long)cpusetsize <= sizeof(cpuset_t) &&
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addr != 0)
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kvm_read(kvm, addr, &stopped_cpus, cpusetsize);
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kgdb_thr_add_procs(paddr);
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addr = kgdb_lookup("zombproc");
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if (addr != 0) {
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kvm_read(kvm, addr, &paddr, sizeof(paddr));
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kgdb_thr_add_procs(paddr);
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}
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curkthr = kgdb_thr_lookup_tid(dumptid);
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if (curkthr == NULL)
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curkthr = first;
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return (first);
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}
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struct kthr *
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kgdb_thr_lookup_tid(int tid)
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{
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struct kthr *kt;
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kt = first;
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while (kt != NULL && kt->tid != tid)
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kt = kt->next;
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return (kt);
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}
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struct kthr *
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kgdb_thr_lookup_taddr(uintptr_t taddr)
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{
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struct kthr *kt;
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kt = first;
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while (kt != NULL && kt->kaddr != taddr)
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kt = kt->next;
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return (kt);
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}
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struct kthr *
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kgdb_thr_lookup_pid(int pid)
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{
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struct kthr *kt;
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kt = first;
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while (kt != NULL && kt->pid != pid)
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kt = kt->next;
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return (kt);
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}
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struct kthr *
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kgdb_thr_lookup_paddr(uintptr_t paddr)
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{
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struct kthr *kt;
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kt = first;
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while (kt != NULL && kt->paddr != paddr)
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kt = kt->next;
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return (kt);
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}
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struct kthr *
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kgdb_thr_next(struct kthr *kt)
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{
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return (kt->next);
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}
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struct kthr *
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kgdb_thr_select(struct kthr *kt)
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{
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struct kthr *pcur;
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pcur = curkthr;
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curkthr = kt;
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return (pcur);
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}
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char *
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kgdb_thr_extra_thread_info(int tid)
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{
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char comm[MAXCOMLEN + 1];
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char td_name[MAXCOMLEN + 1];
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struct kthr *kt;
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struct proc *p;
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struct thread *t;
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static char buf[64];
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kt = kgdb_thr_lookup_tid(tid);
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if (kt == NULL)
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return (NULL);
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snprintf(buf, sizeof(buf), "PID=%d", kt->pid);
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p = (struct proc *)kt->paddr;
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if (kvm_read(kvm, (uintptr_t)&p->p_comm[0], &comm, sizeof(comm)) !=
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sizeof(comm))
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return (buf);
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strlcat(buf, ": ", sizeof(buf));
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strlcat(buf, comm, sizeof(buf));
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t = (struct thread *)kt->kaddr;
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if (kvm_read(kvm, (uintptr_t)&t->td_name[0], &td_name,
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sizeof(td_name)) == sizeof(td_name) &&
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strcmp(comm, td_name) != 0) {
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strlcat(buf, "/", sizeof(buf));
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strlcat(buf, td_name, sizeof(buf));
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}
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return (buf);
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}
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