4513fb36aa
Dicussed with: deischen
930 lines
22 KiB
C
930 lines
22 KiB
C
/*
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* Copyright (c) 2004 David Xu <davidxu@freebsd.org>
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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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* 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 AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* 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 <stddef.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 <pthread.h>
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#include <sys/types.h>
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#include <sys/kse.h>
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#include <sys/ptrace.h>
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#include <proc_service.h>
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#include <thread_db.h>
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#include "libpthread.h"
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#include "libpthread_db.h"
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#define P2T(c) ps2td(c)
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static void pt_unmap_lwp(const td_thragent_t *ta, lwpid_t lwp);
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static int pt_validate(const td_thrhandle_t *th);
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static int
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ps2td(int c)
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{
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switch (c) {
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case PS_OK:
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return TD_OK;
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case PS_ERR:
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return TD_ERR;
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case PS_BADPID:
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return TD_BADPH;
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case PS_BADLID:
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return TD_NOLWP;
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case PS_BADADDR:
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return TD_ERR;
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case PS_NOSYM:
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return TD_NOLIBTHREAD;
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case PS_NOFREGS:
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return TD_NOFPREGS;
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default:
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return TD_ERR;
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}
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}
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static long
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pt_map_thread(const td_thragent_t *const_ta, psaddr_t pt, int type)
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{
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td_thragent_t *ta = __DECONST(td_thragent_t *, const_ta);
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struct pt_map *new;
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int i, first = -1;
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/* leave zero out */
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for (i = 1; i < ta->map_len; ++i) {
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if (ta->map[i].type == PT_NONE) {
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if (first == -1)
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first = i;
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} else if (ta->map[i].type == type && ta->map[i].thr == pt) {
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return (i);
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}
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}
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if (first == -1) {
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if (ta->map_len == 0) {
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ta->map = calloc(20, sizeof(struct pt_map));
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if (ta->map == NULL)
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return (-1);
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ta->map_len = 20;
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first = 1;
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} else {
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new = realloc(ta->map,
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sizeof(struct pt_map) * ta->map_len * 2);
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if (new == NULL)
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return (-1);
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memset(new + ta->map_len, '\0', sizeof(struct pt_map) *
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ta->map_len);
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first = ta->map_len;
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ta->map = new;
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ta->map_len *= 2;
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}
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}
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ta->map[first].type = type;
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ta->map[first].thr = pt;
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return (first);
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}
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static td_err_e
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pt_init(void)
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{
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pt_md_init();
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return (0);
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}
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static td_err_e
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pt_ta_new(struct ps_prochandle *ph, td_thragent_t **pta)
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{
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#define LOOKUP_SYM(proc, sym, addr) \
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ret = ps_pglobal_lookup(proc, NULL, sym, addr); \
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if (ret != 0) { \
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TDBG("can not find symbol: %s\n", sym); \
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ret = TD_NOLIBTHREAD; \
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goto error; \
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}
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td_thragent_t *ta;
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int dbg;
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int ret;
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TDBG_FUNC();
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ta = malloc(sizeof(td_thragent_t));
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if (ta == NULL)
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return (TD_MALLOC);
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ta->ph = ph;
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ta->thread_activated = 0;
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ta->map = NULL;
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ta->map_len = 0;
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LOOKUP_SYM(ph, "_libkse_debug", &ta->libkse_debug_addr);
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LOOKUP_SYM(ph, "_thread_list", &ta->thread_list_addr);
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LOOKUP_SYM(ph, "_thread_activated", &ta->thread_activated_addr);
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LOOKUP_SYM(ph, "_thread_active_threads",&ta->thread_active_threads_addr);
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LOOKUP_SYM(ph, "_thread_keytable", &ta->thread_keytable_addr);
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dbg = getpid();
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/*
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* If this fails it probably means we're debugging a core file and
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* can't write to it.
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*/
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ps_pwrite(ph, ta->libkse_debug_addr, &dbg, sizeof(int));
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*pta = ta;
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return (0);
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error:
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free(ta);
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return (ret);
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}
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static td_err_e
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pt_ta_delete(td_thragent_t *ta)
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{
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int dbg;
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TDBG_FUNC();
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dbg = 0;
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/*
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* Error returns from this write are not really a problem;
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* the process doesn't exist any more.
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*/
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ps_pwrite(ta->ph, ta->libkse_debug_addr, &dbg, sizeof(int));
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if (ta->map)
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free(ta->map);
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free(ta);
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return (TD_OK);
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}
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static td_err_e
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pt_ta_map_id2thr(const td_thragent_t *ta, thread_t id, td_thrhandle_t *th)
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{
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prgregset_t gregs;
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TAILQ_HEAD(, pthread) thread_list;
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psaddr_t pt, tcb_addr;
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lwpid_t lwp;
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int ret;
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TDBG_FUNC();
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if (id < 0 || id >= ta->map_len || ta->map[id].type == PT_NONE)
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return (TD_NOTHR);
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ret = ps_pread(ta->ph, ta->thread_list_addr, &thread_list,
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sizeof(thread_list));
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if (ret != 0)
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return (P2T(ret));
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pt = (psaddr_t)thread_list.tqh_first;
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if (ta->map[id].type == PT_LWP) {
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/*
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* if we are referencing a lwp, make sure it was not already
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* mapped to user thread.
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*/
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while (pt != 0) {
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ret = ps_pread(ta->ph,
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pt + offsetof(struct pthread, tcb),
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&tcb_addr, sizeof(tcb_addr));
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if (ret != 0)
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return (P2T(ret));
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ret = ps_pread(ta->ph,
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tcb_addr + offsetof(struct tcb,
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tcb_tmbx.tm_lwp),
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&lwp, sizeof(lwp));
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if (ret != 0)
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return (P2T(ret));
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/*
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* If the lwp was already mapped to userland thread,
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* we shouldn't reference it directly in future.
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*/
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if (lwp == ta->map[id].lwp) {
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ta->map[id].type = PT_NONE;
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return (TD_NOTHR);
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}
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/* get next thread */
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ret = ps_pread(ta->ph,
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pt + offsetof(struct pthread, tle.tqe_next),
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&pt, sizeof(pt));
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if (ret != 0)
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return (P2T(ret));
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}
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/* check lwp */
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ret = ptrace(PT_GETREGS, ta->map[id].lwp, (caddr_t)&gregs, 0);
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if (ret != 0) {
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/* no longer exists */
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ta->map[id].type = PT_NONE;
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return (TD_NOTHR);
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}
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} else {
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while (pt != 0 && ta->map[id].thr != pt) {
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ret = ps_pread(ta->ph,
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pt + offsetof(struct pthread, tcb),
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&tcb_addr, sizeof(tcb_addr));
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if (ret != 0)
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return (P2T(ret));
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/* get next thread */
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ret = ps_pread(ta->ph,
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pt + offsetof(struct pthread, tle.tqe_next),
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&pt, sizeof(pt));
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if (ret != 0)
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return (P2T(ret));
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}
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if (pt == 0) {
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/* no longer exists */
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ta->map[id].type = PT_NONE;
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return (TD_NOTHR);
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}
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}
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th->th_ta = ta;
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th->th_tid = id;
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return (TD_OK);
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}
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static td_err_e
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pt_ta_map_lwp2thr(const td_thragent_t *ta, lwpid_t lwp, td_thrhandle_t *th)
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{
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TAILQ_HEAD(, pthread) thread_list;
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psaddr_t pt, ptr;
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lwpid_t tmp_lwp;
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int ret;
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TDBG_FUNC();
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ret = ps_pread(ta->ph, ta->thread_list_addr, &thread_list,
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sizeof(thread_list));
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if (ret != 0)
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return (P2T(ret));
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pt = (psaddr_t)thread_list.tqh_first;
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while (pt != 0) {
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ret = ps_pread(ta->ph, pt + offsetof(struct pthread, tcb),
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&ptr, sizeof(ptr));
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if (ret != 0)
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return (P2T(ret));
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ptr += offsetof(struct tcb, tcb_tmbx.tm_lwp);
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ret = ps_pread(ta->ph, ptr, &tmp_lwp, sizeof(lwpid_t));
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if (ret != 0)
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return (P2T(ret));
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if (tmp_lwp == lwp) {
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th->th_ta = ta;
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th->th_tid = pt_map_thread(ta, pt, PT_USER);
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if (th->th_tid == -1)
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return (TD_MALLOC);
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pt_unmap_lwp(ta, lwp);
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return (TD_OK);
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}
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/* get next thread */
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ret = ps_pread(ta->ph,
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pt + offsetof(struct pthread, tle.tqe_next),
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&pt, sizeof(pt));
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if (ret != 0)
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return (P2T(ret));
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}
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return (TD_NOTHR);
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}
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static td_err_e
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pt_ta_thr_iter(const td_thragent_t *ta,
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td_thr_iter_f *callback, void *cbdata_p,
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td_thr_state_e state, int ti_pri,
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sigset_t *ti_sigmask_p,
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unsigned int ti_user_flags)
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{
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TAILQ_HEAD(, pthread) thread_list;
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td_thrhandle_t th;
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psaddr_t pt;
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ps_err_e pserr;
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int activated;
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TDBG_FUNC();
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pserr = ps_pread(ta->ph, ta->thread_activated_addr, &activated,
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sizeof(int));
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if (pserr != PS_OK)
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return (P2T(pserr));
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if (!activated)
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return (TD_OK);
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pserr = ps_pread(ta->ph, ta->thread_list_addr, &thread_list,
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sizeof(thread_list));
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if (pserr != 0)
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return (P2T(pserr));
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pt = (psaddr_t)thread_list.tqh_first;
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while (pt != 0) {
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th.th_ta = ta;
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th.th_tid = pt_map_thread(ta, pt, PT_USER);
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/* should we unmap lwp here ? */
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if (th.th_tid == -1)
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return (TD_MALLOC);
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if ((*callback)(&th, cbdata_p))
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return (TD_DBERR);
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/* get next thread */
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pserr = ps_pread(ta->ph,
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pt + offsetof(struct pthread, tle.tqe_next), &pt,
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sizeof(pt));
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if (pserr != PS_OK)
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return (P2T(pserr));
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}
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return (TD_OK);
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}
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static td_err_e
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pt_ta_tsd_iter(const td_thragent_t *ta, td_key_iter_f *ki, void *arg)
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{
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struct pthread_key keytable[PTHREAD_KEYS_MAX];
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int i, ret;
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TDBG_FUNC();
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ret = ps_pread(ta->ph, (psaddr_t)ta->thread_keytable_addr, keytable,
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sizeof(keytable));
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if (ret != 0)
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return (P2T(ret));
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for (i = 0; i < PTHREAD_KEYS_MAX; i++) {
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if (keytable[i].allocated) {
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ret = (ki)(i, keytable[i].destructor, arg);
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if (ret != 0)
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return (TD_DBERR);
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}
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}
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return (TD_OK);
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}
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static td_err_e
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pt_ta_event_addr(const td_thragent_t *ta, td_event_e event, td_notify_t *ptr)
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{
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TDBG_FUNC();
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return (TD_NOEVENT);
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}
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static td_err_e
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pt_ta_set_event(const td_thragent_t *ta, td_thr_events_t *events)
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{
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TDBG_FUNC();
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return (TD_ERR);
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}
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static td_err_e
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pt_ta_clear_event(const td_thragent_t *ta, td_thr_events_t *events)
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{
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TDBG_FUNC();
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return (TD_ERR);
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}
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static td_err_e
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pt_ta_event_getmsg(const td_thragent_t *ta, td_event_msg_t *msg)
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{
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TDBG_FUNC();
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return (TD_NOMSG);
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}
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static td_err_e
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pt_dbsuspend(const td_thrhandle_t *th, int suspend)
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{
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td_thragent_t *ta = (td_thragent_t *)th->th_ta;
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psaddr_t tcb_addr, tmbx_addr, ptr;
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lwpid_t lwp;
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uint32_t dflags;
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int attrflags;
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int ret;
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TDBG_FUNC();
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ret = pt_validate(th);
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if (ret)
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return (ret);
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if (ta->map[th->th_tid].type == PT_LWP) {
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if (suspend)
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ret = ps_lstop(ta->ph, ta->map[th->th_tid].lwp);
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else
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ret = ps_lcontinue(ta->ph, ta->map[th->th_tid].lwp);
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return (P2T(ret));
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}
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ret = ps_pread(ta->ph, ta->map[th->th_tid].thr +
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offsetof(struct pthread, attr.flags),
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&attrflags, sizeof(attrflags));
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if (ret != 0)
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return (P2T(ret));
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ret = ps_pread(ta->ph, ta->map[th->th_tid].thr +
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offsetof(struct pthread, tcb),
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&tcb_addr, sizeof(tcb_addr));
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if (ret != 0)
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return (P2T(ret));
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tmbx_addr = tcb_addr + offsetof(struct tcb, tcb_tmbx);
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ptr = tmbx_addr + offsetof(struct kse_thr_mailbox, tm_lwp);
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ret = ps_pread(ta->ph, ptr, &lwp, sizeof(lwpid_t));
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if (ret != 0)
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return (P2T(ret));
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/*
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* Don't stop lwp assigned to a M:N thread, it belongs
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* to UTS, UTS shouldn't be stopped.
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*/
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if (lwp != 0 && (attrflags & PTHREAD_SCOPE_SYSTEM)) {
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/* dont' suspend signal thread */
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if (attrflags & THR_SIGNAL_THREAD)
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return 0;
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ptr = ta->map[th->th_tid].thr +
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offsetof(struct pthread, kse);
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/* Too many indirect level :-( */
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/* read struct kse * */
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ret = ps_pread(ta->ph, ptr, &ptr, sizeof(ptr));
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if (ret != 0)
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return (P2T(ret));
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ptr = ptr + offsetof(struct kse, k_kcb);
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/* read k_kcb * */
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ret = ps_pread(ta->ph, ptr, &ptr, sizeof(ptr));
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if (ret != 0)
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return (P2T(ret));
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/* read kcb.kcb_kmbx.km_curthread */
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ptr = ptr + offsetof(struct kcb, kcb_kmbx.km_curthread);
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ret = ps_pread(ta->ph, ptr, &ptr, sizeof(ptr));
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if (ret != 0)
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return (P2T(ret));
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if (ptr != 0) { /* not in critical */
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if (suspend)
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ret = ps_lstop(ta->ph, lwp);
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else
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ret = ps_lcontinue(ta->ph, lwp);
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if (ret != 0)
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return (P2T(ret));
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}
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/* FALLTHROUGH */
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}
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/* read tm_dflags */
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ret = ps_pread(ta->ph,
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tmbx_addr + offsetof(struct kse_thr_mailbox, tm_dflags),
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&dflags, sizeof(dflags));
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if (ret != 0)
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return (P2T(ret));
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if (suspend)
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dflags |= TMDF_SUSPEND;
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else
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dflags &= ~TMDF_SUSPEND;
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ret = ps_pwrite(ta->ph,
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tmbx_addr + offsetof(struct kse_thr_mailbox, tm_dflags),
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&dflags, sizeof(dflags));
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return (P2T(ret));
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}
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static td_err_e
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pt_thr_dbresume(const td_thrhandle_t *th)
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{
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TDBG_FUNC();
|
|
|
|
return pt_dbsuspend(th, 0);
|
|
}
|
|
|
|
static td_err_e
|
|
pt_thr_dbsuspend(const td_thrhandle_t *th)
|
|
{
|
|
TDBG_FUNC();
|
|
|
|
return pt_dbsuspend(th, 1);
|
|
}
|
|
|
|
static td_err_e
|
|
pt_thr_validate(const td_thrhandle_t *th)
|
|
{
|
|
td_thrhandle_t temp;
|
|
int ret;
|
|
|
|
TDBG_FUNC();
|
|
|
|
ret = pt_ta_map_id2thr(th->th_ta, th->th_tid,
|
|
&temp);
|
|
return (ret);
|
|
}
|
|
|
|
static td_err_e
|
|
pt_thr_get_info(const td_thrhandle_t *th, td_thrinfo_t *info)
|
|
{
|
|
const td_thragent_t *ta = th->th_ta;
|
|
struct pthread pt;
|
|
int ret;
|
|
uint32_t dflags;
|
|
|
|
TDBG_FUNC();
|
|
|
|
ret = pt_validate(th);
|
|
if (ret)
|
|
return (ret);
|
|
|
|
memset(info, 0, sizeof(*info));
|
|
if (ta->map[th->th_tid].type == PT_LWP) {
|
|
info->ti_type = TD_THR_SYSTEM;
|
|
info->ti_lid = ta->map[th->th_tid].lwp;
|
|
info->ti_tid = th->th_tid;
|
|
info->ti_state = TD_THR_RUN;
|
|
info->ti_type = TD_THR_SYSTEM;
|
|
return (TD_OK);
|
|
}
|
|
|
|
ret = ps_pread(ta->ph, (psaddr_t)(ta->map[th->th_tid].thr),
|
|
&pt, sizeof(pt));
|
|
if (ret != 0)
|
|
return (P2T(ret));
|
|
if (pt.magic != THR_MAGIC)
|
|
return (TD_BADTH);
|
|
ret = ps_pread(ta->ph,
|
|
((psaddr_t)pt.tcb) + offsetof(struct tcb, tcb_tmbx.tm_lwp),
|
|
&info->ti_lid, sizeof(lwpid_t));
|
|
if (ret != 0)
|
|
return (P2T(ret));
|
|
ret = ps_pread(ta->ph,
|
|
((psaddr_t)pt.tcb) + offsetof(struct tcb, tcb_tmbx.tm_dflags),
|
|
&dflags, sizeof(dflags));
|
|
if (ret != 0)
|
|
return (P2T(ret));
|
|
info->ti_ta_p = th->th_ta;
|
|
info->ti_tid = th->th_tid;
|
|
info->ti_tls = (char *)pt.specific;
|
|
info->ti_startfunc = (psaddr_t)pt.start_routine;
|
|
info->ti_stkbase = (psaddr_t) pt.attr.stackaddr_attr;
|
|
info->ti_stksize = pt.attr.stacksize_attr;
|
|
switch (pt.state) {
|
|
case PS_RUNNING:
|
|
info->ti_state = TD_THR_RUN;
|
|
break;
|
|
case PS_LOCKWAIT:
|
|
case PS_MUTEX_WAIT:
|
|
case PS_COND_WAIT:
|
|
case PS_SIGSUSPEND:
|
|
case PS_SIGWAIT:
|
|
case PS_JOIN:
|
|
case PS_SUSPENDED:
|
|
case PS_DEADLOCK:
|
|
case PS_SLEEP_WAIT:
|
|
info->ti_state = TD_THR_SLEEP;
|
|
break;
|
|
case PS_DEAD:
|
|
info->ti_state = TD_THR_ZOMBIE;
|
|
break;
|
|
default:
|
|
info->ti_state = TD_THR_UNKNOWN;
|
|
break;
|
|
}
|
|
|
|
info->ti_db_suspended = ((dflags & TMDF_SUSPEND) != 0);
|
|
info->ti_type = TD_THR_USER;
|
|
info->ti_pri = pt.active_priority;
|
|
info->ti_sigmask = pt.sigmask;
|
|
info->ti_traceme = 0;
|
|
info->ti_pending = pt.sigpend;
|
|
info->ti_events = 0;
|
|
return (0);
|
|
}
|
|
|
|
static td_err_e
|
|
pt_thr_getfpregs(const td_thrhandle_t *th, prfpregset_t *fpregs)
|
|
{
|
|
const td_thragent_t *ta = th->th_ta;
|
|
struct kse_thr_mailbox tmbx;
|
|
psaddr_t tcb_addr, tmbx_addr, ptr;
|
|
lwpid_t lwp;
|
|
int ret;
|
|
|
|
TDBG_FUNC();
|
|
|
|
ret = pt_validate(th);
|
|
if (ret)
|
|
return (ret);
|
|
|
|
if (ta->map[th->th_tid].type == PT_LWP) {
|
|
ret = ps_lgetfpregs(ta->ph, ta->map[th->th_tid].lwp, fpregs);
|
|
return (P2T(ret));
|
|
}
|
|
|
|
ret = ps_pread(ta->ph, ta->map[th->th_tid].thr +
|
|
offsetof(struct pthread, tcb),
|
|
&tcb_addr, sizeof(tcb_addr));
|
|
if (ret != 0)
|
|
return (P2T(ret));
|
|
tmbx_addr = tcb_addr + offsetof(struct tcb, tcb_tmbx);
|
|
ptr = tmbx_addr + offsetof(struct kse_thr_mailbox, tm_lwp);
|
|
ret = ps_pread(ta->ph, ptr, &lwp, sizeof(lwpid_t));
|
|
if (ret != 0)
|
|
return (P2T(ret));
|
|
if (lwp != 0) {
|
|
ret = ps_lgetfpregs(ta->ph, lwp, fpregs);
|
|
return (P2T(ret));
|
|
}
|
|
|
|
ret = ps_pread(ta->ph, tmbx_addr, &tmbx, sizeof(tmbx));
|
|
if (ret != 0)
|
|
return (P2T(ret));
|
|
pt_ucontext_to_fpreg(&tmbx.tm_context, fpregs);
|
|
return (0);
|
|
}
|
|
|
|
static td_err_e
|
|
pt_thr_getgregs(const td_thrhandle_t *th, prgregset_t gregs)
|
|
{
|
|
const td_thragent_t *ta = th->th_ta;
|
|
struct kse_thr_mailbox tmbx;
|
|
psaddr_t tcb_addr, tmbx_addr, ptr;
|
|
lwpid_t lwp;
|
|
int ret;
|
|
|
|
TDBG_FUNC();
|
|
|
|
ret = pt_validate(th);
|
|
if (ret)
|
|
return (ret);
|
|
|
|
if (ta->map[th->th_tid].type == PT_LWP) {
|
|
ret = ps_lgetregs(ta->ph,
|
|
ta->map[th->th_tid].lwp, gregs);
|
|
return (P2T(ret));
|
|
}
|
|
|
|
ret = ps_pread(ta->ph, ta->map[th->th_tid].thr +
|
|
offsetof(struct pthread, tcb),
|
|
&tcb_addr, sizeof(tcb_addr));
|
|
if (ret != 0)
|
|
return (P2T(ret));
|
|
tmbx_addr = tcb_addr + offsetof(struct tcb, tcb_tmbx);
|
|
ptr = tmbx_addr + offsetof(struct kse_thr_mailbox, tm_lwp);
|
|
ret = ps_pread(ta->ph, ptr, &lwp, sizeof(lwpid_t));
|
|
if (ret != 0)
|
|
return (P2T(ret));
|
|
if (lwp != 0) {
|
|
ret = ps_lgetregs(ta->ph, lwp, gregs);
|
|
return (P2T(ret));
|
|
}
|
|
ret = ps_pread(ta->ph, tmbx_addr, &tmbx, sizeof(tmbx));
|
|
if (ret != 0)
|
|
return (P2T(ret));
|
|
pt_ucontext_to_reg(&tmbx.tm_context, gregs);
|
|
return (0);
|
|
}
|
|
|
|
static td_err_e
|
|
pt_thr_setfpregs(const td_thrhandle_t *th, const prfpregset_t *fpregs)
|
|
{
|
|
const td_thragent_t *ta = th->th_ta;
|
|
struct kse_thr_mailbox tmbx;
|
|
psaddr_t tcb_addr, tmbx_addr, ptr;
|
|
lwpid_t lwp;
|
|
int ret;
|
|
|
|
TDBG_FUNC();
|
|
|
|
ret = pt_validate(th);
|
|
if (ret)
|
|
return (ret);
|
|
|
|
if (ta->map[th->th_tid].type == PT_LWP) {
|
|
ret = ps_lsetfpregs(ta->ph, ta->map[th->th_tid].lwp, fpregs);
|
|
return (P2T(ret));
|
|
}
|
|
|
|
ret = ps_pread(ta->ph, ta->map[th->th_tid].thr +
|
|
offsetof(struct pthread, tcb),
|
|
&tcb_addr, sizeof(tcb_addr));
|
|
if (ret != 0)
|
|
return (P2T(ret));
|
|
tmbx_addr = tcb_addr + offsetof(struct tcb, tcb_tmbx);
|
|
ptr = tmbx_addr + offsetof(struct kse_thr_mailbox, tm_lwp);
|
|
ret = ps_pread(ta->ph, ptr, &lwp, sizeof(lwpid_t));
|
|
if (ret != 0)
|
|
return (P2T(ret));
|
|
if (lwp != 0) {
|
|
ret = ps_lsetfpregs(ta->ph, lwp, fpregs);
|
|
return (P2T(ret));
|
|
}
|
|
/*
|
|
* Read a copy of context, this makes sure that registers
|
|
* not covered by structure reg won't be clobbered
|
|
*/
|
|
ret = ps_pread(ta->ph, tmbx_addr, &tmbx, sizeof(tmbx));
|
|
if (ret != 0)
|
|
return (P2T(ret));
|
|
|
|
pt_fpreg_to_ucontext(fpregs, &tmbx.tm_context);
|
|
ret = ps_pwrite(ta->ph, tmbx_addr, &tmbx, sizeof(tmbx));
|
|
return (P2T(ret));
|
|
}
|
|
|
|
static td_err_e
|
|
pt_thr_setgregs(const td_thrhandle_t *th, const prgregset_t gregs)
|
|
{
|
|
const td_thragent_t *ta = th->th_ta;
|
|
struct kse_thr_mailbox tmbx;
|
|
psaddr_t tcb_addr, tmbx_addr, ptr;
|
|
lwpid_t lwp;
|
|
int ret;
|
|
|
|
TDBG_FUNC();
|
|
|
|
ret = pt_validate(th);
|
|
if (ret)
|
|
return (ret);
|
|
|
|
if (ta->map[th->th_tid].type == PT_LWP) {
|
|
ret = ps_lsetregs(ta->ph, ta->map[th->th_tid].lwp, gregs);
|
|
return (P2T(ret));
|
|
}
|
|
|
|
ret = ps_pread(ta->ph, ta->map[th->th_tid].thr +
|
|
offsetof(struct pthread, tcb),
|
|
&tcb_addr, sizeof(tcb_addr));
|
|
if (ret != 0)
|
|
return (P2T(ret));
|
|
tmbx_addr = tcb_addr + offsetof(struct tcb, tcb_tmbx);
|
|
ptr = tmbx_addr + offsetof(struct kse_thr_mailbox, tm_lwp);
|
|
ret = ps_pread(ta->ph, ptr, &lwp, sizeof(lwpid_t));
|
|
if (ret != 0)
|
|
return (P2T(ret));
|
|
if (lwp != 0) {
|
|
ret = ps_lsetregs(ta->ph, lwp, gregs);
|
|
return (P2T(ret));
|
|
}
|
|
|
|
/*
|
|
* Read a copy of context, make sure that registers
|
|
* not covered by structure reg won't be clobbered
|
|
*/
|
|
ret = ps_pread(ta->ph, tmbx_addr, &tmbx, sizeof(tmbx));
|
|
if (ret != 0)
|
|
return (P2T(ret));
|
|
pt_reg_to_ucontext(gregs, &tmbx.tm_context);
|
|
ret = ps_pwrite(ta->ph, tmbx_addr, &tmbx, sizeof(tmbx));
|
|
return (P2T(ret));
|
|
}
|
|
|
|
static td_err_e
|
|
pt_thr_event_enable(const td_thrhandle_t *th, int en)
|
|
{
|
|
TDBG_FUNC();
|
|
return (TD_ERR);
|
|
}
|
|
|
|
static td_err_e
|
|
pt_thr_set_event(const td_thrhandle_t *th, td_thr_events_t *setp)
|
|
{
|
|
TDBG_FUNC();
|
|
return (TD_ERR);
|
|
}
|
|
|
|
static td_err_e
|
|
pt_thr_clear_event(const td_thrhandle_t *th, td_thr_events_t *setp)
|
|
{
|
|
TDBG_FUNC();
|
|
return (TD_ERR);
|
|
}
|
|
|
|
static td_err_e
|
|
pt_thr_event_getmsg(const td_thrhandle_t *th, td_event_msg_t *msg)
|
|
{
|
|
TDBG_FUNC();
|
|
return (TD_NOMSG);
|
|
}
|
|
|
|
static td_err_e
|
|
pt_thr_sstep(const td_thrhandle_t *th, int step)
|
|
{
|
|
const td_thragent_t *ta = th->th_ta;
|
|
struct kse_thr_mailbox tmbx;
|
|
struct reg regs;
|
|
psaddr_t tcb_addr, tmbx_addr;
|
|
uint32_t dflags;
|
|
lwpid_t lwp;
|
|
int ret;
|
|
|
|
TDBG_FUNC();
|
|
|
|
ret = pt_validate(th);
|
|
if (ret)
|
|
return (ret);
|
|
|
|
if (ta->map[th->th_tid].type == PT_LWP)
|
|
return (TD_BADTH);
|
|
|
|
ret = ps_pread(ta->ph, ta->map[th->th_tid].thr +
|
|
offsetof(struct pthread, tcb),
|
|
&tcb_addr, sizeof(tcb_addr));
|
|
if (ret != 0)
|
|
return (P2T(ret));
|
|
|
|
/* Clear or set single step flag in thread mailbox */
|
|
ret = ps_pread(ta->ph, tcb_addr + offsetof(struct tcb,
|
|
tcb_tmbx.tm_dflags), &dflags, sizeof(uint32_t));
|
|
if (ret != 0)
|
|
return (P2T(ret));
|
|
if (step != 0)
|
|
dflags |= TMDF_SSTEP;
|
|
else
|
|
dflags &= ~TMDF_SSTEP;
|
|
ret = ps_pwrite(ta->ph, tcb_addr + offsetof(struct tcb,
|
|
tcb_tmbx.tm_dflags), &dflags, sizeof(uint32_t));
|
|
if (ret != 0)
|
|
return (P2T(ret));
|
|
/* Get lwp */
|
|
ret = ps_pread(ta->ph, tcb_addr + offsetof(struct tcb,
|
|
tcb_tmbx.tm_lwp), &lwp, sizeof(lwpid_t));
|
|
if (ret != 0)
|
|
return (P2T(ret));
|
|
if (lwp != 0)
|
|
return (0);
|
|
|
|
tmbx_addr = tcb_addr + offsetof(struct tcb, tcb_tmbx);
|
|
/*
|
|
* context is in userland, some architectures store
|
|
* single step status in registers, we should change
|
|
* these registers.
|
|
*/
|
|
ret = ps_pread(ta->ph, tmbx_addr, &tmbx, sizeof(tmbx));
|
|
if (ret == 0) {
|
|
pt_ucontext_to_reg(&tmbx.tm_context, ®s);
|
|
/* only write out if it is really changed. */
|
|
if (pt_reg_sstep(®s, step) != 0) {
|
|
pt_reg_to_ucontext(®s, &tmbx.tm_context);
|
|
ret = ps_pwrite(ta->ph, tmbx_addr, &tmbx,
|
|
sizeof(tmbx));
|
|
}
|
|
}
|
|
return (P2T(ret));
|
|
}
|
|
|
|
static void
|
|
pt_unmap_lwp(const td_thragent_t *ta, lwpid_t lwp)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < ta->map_len; ++i) {
|
|
if (ta->map[i].type == PT_LWP && ta->map[i].lwp == lwp) {
|
|
ta->map[i].type = PT_NONE;
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
static int
|
|
pt_validate(const td_thrhandle_t *th)
|
|
{
|
|
|
|
if (th->th_tid < 0 || th->th_tid >= th->th_ta->map_len ||
|
|
th->th_ta->map[th->th_tid].type == PT_NONE)
|
|
return (TD_NOTHR);
|
|
return (TD_OK);
|
|
}
|
|
|
|
struct ta_ops libpthread_db_ops = {
|
|
.to_init = pt_init,
|
|
.to_ta_clear_event = pt_ta_clear_event,
|
|
.to_ta_delete = pt_ta_delete,
|
|
.to_ta_event_addr = pt_ta_event_addr,
|
|
.to_ta_event_getmsg = pt_ta_event_getmsg,
|
|
.to_ta_map_id2thr = pt_ta_map_id2thr,
|
|
.to_ta_map_lwp2thr = pt_ta_map_lwp2thr,
|
|
.to_ta_new = pt_ta_new,
|
|
.to_ta_set_event = pt_ta_set_event,
|
|
.to_ta_thr_iter = pt_ta_thr_iter,
|
|
.to_ta_tsd_iter = pt_ta_tsd_iter,
|
|
.to_thr_clear_event = pt_thr_clear_event,
|
|
.to_thr_dbresume = pt_thr_dbresume,
|
|
.to_thr_dbsuspend = pt_thr_dbsuspend,
|
|
.to_thr_event_enable = pt_thr_event_enable,
|
|
.to_thr_event_getmsg = pt_thr_event_getmsg,
|
|
.to_thr_get_info = pt_thr_get_info,
|
|
.to_thr_getfpregs = pt_thr_getfpregs,
|
|
.to_thr_getgregs = pt_thr_getgregs,
|
|
.to_thr_set_event = pt_thr_set_event,
|
|
.to_thr_setfpregs = pt_thr_setfpregs,
|
|
.to_thr_setgregs = pt_thr_setgregs,
|
|
.to_thr_validate = pt_thr_validate,
|
|
|
|
/* FreeBSD specific extensions. */
|
|
.to_thr_sstep = pt_thr_sstep,
|
|
};
|