diff options
Diffstat (limited to 'lib/libthread_db/pthread/pthread_db.c')
| -rw-r--r-- | lib/libthread_db/pthread/pthread_db.c | 1087 |
1 files changed, 1087 insertions, 0 deletions
diff --git a/lib/libthread_db/pthread/pthread_db.c b/lib/libthread_db/pthread/pthread_db.c new file mode 100644 index 0000000..e4f74a6 --- /dev/null +++ b/lib/libthread_db/pthread/pthread_db.c @@ -0,0 +1,1087 @@ +/* + * Copyright (c) 2004 David Xu <davidxu@freebsd.org> + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <stddef.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#include <pthread.h> +#include <thr_private.h> +#include <sys/types.h> +#include <sys/kse.h> +#include <sys/ptrace.h> +#include <proc_service.h> +#include <thread_db.h> + +#include "pthread_db.h" + +struct pt_map { + enum { + PT_NONE, + PT_USER, + PT_LWP + } type; + + union { + lwpid_t lwp; + psaddr_t thr; + }; +}; + +#define P2T(c) ps2td(c) + +static td_err_e pt_ta_activated(pt_thragent_t *ta, int *a); +static long pt_map_thread(const pt_thragent_t *ta, psaddr_t pt); +static long pt_map_lwp(const pt_thragent_t *ta, lwpid_t lwp); +static void pt_unmap_lwp(const pt_thragent_t *ta, lwpid_t lwp); +static int pt_validate(const td_thrhandle_t *th); + +static int +ps2td(int c) +{ + switch (c) { + case PS_OK: + return TD_OK; + case PS_ERR: + return TD_ERR; + case PS_BADPID: + return TD_BADPH; + case PS_BADLID: + return TD_NOLWP; + case PS_BADADDR: + return TD_ERR; + case PS_NOSYM: + return TD_NOLIBTHREAD; + case PS_NOFREGS: + return TD_NOFPREGS; + default: + return TD_ERR; + } +} + +static td_err_e +pt_init(void) +{ + pt_md_init(); + return (0); +} + +static td_err_e +pt_ta_new(struct ps_prochandle *ph, pt_thragent_t **pta) +{ +#define LOOKUP_SYM(proc, sym, addr) \ + ret = ps_pglobal_lookup(proc, NULL, sym, addr); \ + if (ret != 0) { \ + TDBG("can not find symbol: %s\n", sym); \ + ret = TD_NOLIBTHREAD; \ + goto error; \ + } + + pt_thragent_t *ta; + int dbg; + int ret; + + TDBG_FUNC(); + + ta = malloc(sizeof(pt_thragent_t)); + if (ta == NULL) + return (TD_MALLOC); + + ta->ph = ph; + ta->thread_activated = 0; + ta->map = NULL; + ta->map_len = 0; + + LOOKUP_SYM(ph, "_libkse_debug", &ta->libkse_debug_addr); + LOOKUP_SYM(ph, "_thread_list", &ta->thread_list_addr); + LOOKUP_SYM(ph, "_thread_activated", &ta->thread_activated_addr); + LOOKUP_SYM(ph, "_thread_active_threads",&ta->thread_active_threads_addr); + LOOKUP_SYM(ph, "_thread_keytable", &ta->thread_keytable_addr); + + dbg = getpid(); + /* + * If this fails it probably means we're debugging a core file and + * can't write to it. + */ + ps_pdwrite(ph, ta->libkse_debug_addr, &dbg, sizeof(int)); + *pta = ta; + return (0); + +error: + free(ta); + return (ret); +} + +static td_err_e +pt_ta_delete(pt_thragent_t *ta) +{ + int dbg; + + TDBG_FUNC(); + + dbg = 0; + /* + * Error returns from this write are not really a problem; + * the process doesn't exist any more. + */ + ps_pdwrite(ta->ph, ta->libkse_debug_addr, &dbg, sizeof(int)); + if (ta->map) + free(ta->map); + free(ta); + return (TD_OK); +} + +static td_err_e +pt_ta_get_nthreads (const pt_thragent_t *ta, int *np) +{ + int ret; + + TDBG_FUNC(); + + ret = ps_pdread(ta->ph, ta->thread_active_threads_addr, np, + sizeof(int)); + return (P2T(ret)); +} + +static td_err_e +pt_ta_get_ph(const pt_thragent_t *ta, struct ps_prochandle **ph) +{ + TDBG_FUNC(); + + *ph = ta->ph; + return (TD_OK); +} + +static td_err_e +pt_ta_map_id2thr(const pt_thragent_t *ta, thread_t id, td_thrhandle_t *th) +{ + prgregset_t gregs; + TAILQ_HEAD(, pthread) thread_list; + psaddr_t pt, tcb_addr; + lwpid_t lwp; + int ret; + + TDBG_FUNC(); + + if (id < 0 || id >= ta->map_len || ta->map[id].type == PT_NONE) + return (TD_NOTHR); + ret = ps_pdread(ta->ph, ta->thread_list_addr, &thread_list, + sizeof(thread_list)); + if (ret != 0) + return (P2T(ret)); + pt = (psaddr_t)thread_list.tqh_first; + if (ta->map[id].type == PT_LWP) { + /* + * if we are referencing a lwp, make sure it was not already + * mapped to user thread. + */ + while (pt != 0) { + ret = ps_pdread(ta->ph, + pt + offsetof(struct pthread, tcb), + &tcb_addr, sizeof(tcb_addr)); + if (ret != 0) + return (P2T(ret)); + ret = ps_pdread(ta->ph, + tcb_addr + offsetof(struct tcb, + tcb_tmbx.tm_lwp), + &lwp, sizeof(lwp)); + if (ret != 0) + return (P2T(ret)); + /* + * If the lwp was already mapped to userland thread, + * we shouldn't reference it directly in future. + */ + if (lwp == ta->map[id].lwp) { + ta->map[id].type = PT_NONE; + return (TD_NOTHR); + } + /* get next thread */ + ret = ps_pdread(ta->ph, + pt + offsetof(struct pthread, tle.tqe_next), + &pt, sizeof(pt)); + if (ret != 0) + return (P2T(ret)); + } + /* check lwp */ + ret = ptrace(PT_GETREGS, ta->map[id].lwp, (caddr_t)&gregs, 0); + if (ret != 0) { + /* no longer exists */ + ta->map[id].type = PT_NONE; + return (TD_NOTHR); + } + } else { + while (pt != 0 && ta->map[id].thr != pt) { + ret = ps_pdread(ta->ph, + pt + offsetof(struct pthread, tcb), + &tcb_addr, sizeof(tcb_addr)); + if (ret != 0) + return (P2T(ret)); + /* get next thread */ + ret = ps_pdread(ta->ph, + pt + offsetof(struct pthread, tle.tqe_next), + &pt, sizeof(pt)); + if (ret != 0) + return (P2T(ret)); + } + + if (pt == 0) { + /* no longer exists */ + ta->map[id].type = PT_NONE; + return (TD_NOTHR); + } + } + th->th_ta_p = (td_thragent_t *)ta; + th->th_unique = id; + return (TD_OK); +} + +static td_err_e +pt_ta_map_lwp2thr(const pt_thragent_t *ta, lwpid_t lwp, td_thrhandle_t *th) +{ + TAILQ_HEAD(, pthread) thread_list; + psaddr_t pt, ptr; + lwpid_t tmp_lwp; + int ret; + + TDBG_FUNC(); + + ret = ps_pdread(ta->ph, ta->thread_list_addr, &thread_list, + sizeof(thread_list)); + if (ret != 0) + return (P2T(ret)); + pt = (psaddr_t)thread_list.tqh_first; + while (pt != 0) { + ret = ps_pdread(ta->ph, pt + offsetof(struct pthread, tcb), + &ptr, sizeof(ptr)); + if (ret != 0) + return (P2T(ret)); + ptr += offsetof(struct tcb, tcb_tmbx.tm_lwp); + ret = ps_pdread(ta->ph, ptr, &tmp_lwp, sizeof(lwpid_t)); + if (ret != 0) + return (P2T(ret)); + if (tmp_lwp == lwp) { + th->th_ta_p = (td_thragent_t *)ta; + th->th_unique = pt_map_thread(ta, pt); + if (th->th_unique == -1) + return (TD_MALLOC); + pt_unmap_lwp(ta, lwp); + return (TD_OK); + } + + /* get next thread */ + ret = ps_pdread(ta->ph, + pt + offsetof(struct pthread, tle.tqe_next), + &pt, sizeof(pt)); + if (ret != 0) + return (P2T(ret)); + } + + return (TD_NOTHR); +} + +static td_err_e +pt_ta_thr_iter(const pt_thragent_t *ta, + td_thr_iter_f *callback, void *cbdata_p, + td_thr_state_e state, int ti_pri, + sigset_t *ti_sigmask_p, + unsigned int ti_user_flags) +{ + TAILQ_HEAD(, pthread) thread_list; + td_thrhandle_t th; + psaddr_t pt; + int ret, activated; + + TDBG_FUNC(); + + ret = pt_ta_activated((pt_thragent_t *)ta, &activated); + if (ret != 0) + return (P2T(ret)); + if (!activated) + return (0); + ret = ps_pdread(ta->ph, ta->thread_list_addr, &thread_list, + sizeof(thread_list)); + if (ret != 0) + return (P2T(ret)); + pt = (psaddr_t)thread_list.tqh_first; + while (pt != 0) { + th.th_ta_p = (td_thragent_t *)ta; + th.th_unique = pt_map_thread(ta, pt); + /* should we unmap lwp here ? */ + if (th.th_unique == -1) + return (TD_MALLOC); + if ((*callback)(&th, cbdata_p)) + return (TD_DBERR); + /* get next thread */ + ret = ps_pdread(ta->ph, + pt + offsetof(struct pthread, tle.tqe_next), + &pt, sizeof(pt)); + if (ret != 0) + return (P2T(ret)); + } + return (TD_OK); +} + +static td_err_e +pt_ta_tsd_iter(const pt_thragent_t *ta, td_key_iter_f *ki, void *arg) +{ + struct pthread_key keytable[PTHREAD_KEYS_MAX]; + int i, ret; + + TDBG_FUNC(); + + ret = ps_pdread(ta->ph, (psaddr_t)ta->thread_keytable_addr, keytable, + sizeof(keytable)); + if (ret != 0) + return (P2T(ret)); + + for (i = 0; i < PTHREAD_KEYS_MAX; i++) { + if (keytable[i].allocated) { + ret = (ki)(i, keytable[i].destructor, arg); + if (ret != 0) + return (TD_DBERR); + } + } + return (TD_OK); +} + +static td_err_e +pt_ta_event_addr(const pt_thragent_t *ta, td_event_e event, td_notify_t *ptr) +{ + TDBG_FUNC(); + return (TD_NOEVENT); +} + +static td_err_e +pt_ta_set_event(const pt_thragent_t *ta, td_thr_events_t *events) +{ + TDBG_FUNC(); + return (TD_ERR); +} + +static td_err_e +pt_ta_clear_event(const pt_thragent_t *ta, td_thr_events_t *events) +{ + TDBG_FUNC(); + return (TD_ERR); +} + +static td_err_e +pt_ta_event_getmsg(const pt_thragent_t *ta, td_event_msg_t *msg) +{ + TDBG_FUNC(); + return (TD_NOMSG); +} + +static td_err_e +pt_ta_setconcurrency(const pt_thragent_t *ta, int level) +{ + TDBG_FUNC(); + return (TD_OK); +} + +static td_err_e +pt_ta_enable_stats(const pt_thragent_t *ta, int enable) +{ + TDBG_FUNC(); + return (TD_OK); +} + +static td_err_e +pt_ta_reset_stats(const pt_thragent_t *ta) +{ + TDBG_FUNC(); + return (TD_OK); +} + +static td_err_e +pt_ta_get_stats(const pt_thragent_t *ta, td_ta_stats_t *statsp) +{ + TDBG_FUNC(); + return (TD_OK); +} + +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((pt_thragent_t *)th->th_ta_p, th->th_unique, + &temp); + return (P2T(ret)); +} + +static td_err_e +pt_thr_get_info(const td_thrhandle_t *th, td_thrinfo_t *info) +{ + struct pthread pt; + pt_thragent_t *ta = (pt_thragent_t *)th->th_ta_p; + psaddr_t tcb_addr; + uint32_t dflags; + int ret; + + TDBG_FUNC(); + + ret = pt_validate(th); + if (ret) + return (ret); + + memset(info, 0, sizeof(*info)); + if (ta->map[th->th_unique].type == PT_LWP) { + info->ti_type = TD_THR_SYSTEM; + info->ti_lid = ta->map[th->th_unique].lwp; + info->ti_tid = th->th_unique; + info->ti_state = TD_THR_RUN; + info->ti_type = TD_THR_SYSTEM; + return (TD_OK); + } + + ret = ps_pdread(ta->ph, (psaddr_t)(ta->map[th->th_unique].thr), + &pt, sizeof(pt)); + if (ret != 0) + return (P2T(ret)); + if (pt.magic != THR_MAGIC) + return (TD_BADTH); + tcb_addr = (psaddr_t) pt.tcb; + ret = ps_pdread(ta->ph, + tcb_addr + offsetof(struct tcb, tcb_tmbx.tm_lwp), + &info->ti_lid, sizeof(lwpid_t)); + if (ret != 0) + return (P2T(ret)); + ret = ps_pdread(ta->ph, + tcb_addr + offsetof(struct tcb, tcb_tmbx.tm_dflags), + &dflags, sizeof(dflags)); + info->ti_ta_p = th->th_ta_p; + info->ti_tid = th->th_unique; + 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_DONOTRUNUSER) != 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) +{ + struct kse_thr_mailbox tmbx; + pt_thragent_t *ta = (pt_thragent_t *)th->th_ta_p; + 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_unique].type == PT_LWP) { + ret = ps_lgetfpregs(ta->ph, ta->map[th->th_unique].lwp, fpregs); + return (P2T(ret)); + } + + ret = ps_pdread(ta->ph, ta->map[th->th_unique].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_pdread(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_pdread(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) +{ + struct kse_thr_mailbox tmbx; + pt_thragent_t *ta = (pt_thragent_t *)th->th_ta_p; + 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_unique].type == PT_LWP) { + ret = ps_lgetregs(ta->ph, + ta->map[th->th_unique].lwp, gregs); + return (P2T(ret)); + } + + ret = ps_pdread(ta->ph, ta->map[th->th_unique].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_pdread(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_pdread(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_getxregs (const td_thrhandle_t *th, void *xregs) +{ + return (TD_NOXREGS); +} + +static td_err_e +pt_thr_getxregsize (const td_thrhandle_t *th, int *sizep) +{ + return (TD_NOXREGS); +} + +static td_err_e +pt_thr_setfpregs(const td_thrhandle_t *th, const prfpregset_t *fpregs) +{ + struct kse_thr_mailbox tmbx; + pt_thragent_t *ta = (pt_thragent_t *)th->th_ta_p; + 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_unique].type == PT_LWP) { + ret = ps_lsetfpregs(ta->ph, ta->map[th->th_unique].lwp, fpregs); + return (P2T(ret)); + } + + ret = ps_pdread(ta->ph, ta->map[th->th_unique].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_pdread(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_pdread(ta->ph, tmbx_addr, &tmbx, sizeof(tmbx)); + if (ret != 0) + return (P2T(ret)); + + pt_fpreg_to_ucontext(fpregs, &tmbx.tm_context); + ret = ps_pdwrite(ta->ph, tmbx_addr, &tmbx, sizeof(tmbx)); + return (P2T(ret)); +} + +static td_err_e +pt_thr_setgregs(const td_thrhandle_t *th, prgregset_t gregs) +{ + struct kse_thr_mailbox tmbx; + pt_thragent_t *ta = (pt_thragent_t *)th->th_ta_p; + 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_unique].type == PT_LWP) { + ret = ps_lsetregs(ta->ph, ta->map[th->th_unique].lwp, gregs); + return (P2T(ret)); + } + + ret = ps_pdread(ta->ph, ta->map[th->th_unique].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_pdread(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_pdread(ta->ph, tmbx_addr, &tmbx, sizeof(tmbx)); + if (ret != 0) + return (P2T(ret)); + pt_reg_to_ucontext(gregs, &tmbx.tm_context); + ret = ps_pdwrite(ta->ph, tmbx_addr, &tmbx, sizeof(tmbx)); + return (P2T(ret)); +} + +static td_err_e +pt_thr_setxregs(const td_thrhandle_t *th, const void *addr) +{ + TDBG_FUNC(); + return (TD_NOXREGS); +} + +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_setprio(const td_thrhandle_t *th, int pri) +{ + TDBG_FUNC(); + return (TD_OK); +} + +static td_err_e +pt_thr_setsigpending(const td_thrhandle_t *th, unsigned char n, + const sigset_t *set) +{ + TDBG_FUNC(); + return (TD_OK); +} + +static td_err_e +pt_thr_sigsetmask(const td_thrhandle_t *th, const sigset_t *set) +{ + TDBG_FUNC(); + return (TD_OK); +} + +static td_err_e +pt_thr_tsd(const td_thrhandle_t *th, const thread_key_t key, void **data) +{ + pt_thragent_t *ta = (pt_thragent_t *)th->th_ta_p; + struct pthread_specific_elem *spec, elem; + int ret; + + TDBG_FUNC(); + + ret = pt_validate(th); + if (ret) + return (ret); + + if (key < 0 || key >= PTHREAD_KEYS_MAX) + return (TD_BADKEY); + + if (ta->map[th->th_unique].type == PT_LWP) { + *data = NULL; + return (TD_OK); + } + + ret = ps_pdread(ta->ph, + ta->map[th->th_unique].thr + + offsetof(struct pthread, specific), + &spec, sizeof(spec)); + if (ret == 0) { + if (spec == NULL) { + *data = NULL; + return (0); + } + ret = ps_pdread(ta->ph, (psaddr_t)&spec[key], + &elem, sizeof(elem)); + if (ret == 0) + *data = (void *)elem.data; + } + return (P2T(ret)); +} + +static td_err_e +pt_dbsuspend(const td_thrhandle_t *th, int suspend) +{ + pt_thragent_t *ta = (pt_thragent_t *)th->th_ta_p; + psaddr_t tcb_addr, tmbx_addr, ptr; + lwpid_t lwp; + uint32_t dflags; + int attrflags; + int ret; + + TDBG_FUNC(); + + ret = pt_validate(th); + if (ret) + return (ret); + + if (ta->map[th->th_unique].type == PT_LWP) { + if (suspend) + ret = ps_lstop(ta->ph, ta->map[th->th_unique].lwp); + else + ret = ps_lcontinue(ta->ph, ta->map[th->th_unique].lwp); + return (P2T(ret)); + } + + ret = ps_pdread(ta->ph, ta->map[th->th_unique].thr + + offsetof(struct pthread, attr.flags), + &attrflags, sizeof(attrflags)); + if (ret != 0) + return (P2T(ret)); + ret = ps_pdread(ta->ph, ta->map[th->th_unique].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_pdread(ta->ph, ptr, &lwp, sizeof(lwpid_t)); + if (ret != 0) + return (P2T(ret)); + /* + * don't stop lwp assigned to a M:N thread, it belongs + * to UTS, UTS shouldn't be stopped. + */ + if (lwp != 0 && (attrflags & PTHREAD_SCOPE_SYSTEM)) { + /* dont' suspend signal thread */ + if (attrflags & THR_SIGNAL_THREAD) + return 0; + if (suspend) + ret = ps_lstop(ta->ph, lwp); + else + ret = ps_lcontinue(ta->ph, lwp); + return (P2T(ret)); + } + + ret = ps_pdread(ta->ph, + tmbx_addr + offsetof(struct kse_thr_mailbox, tm_dflags), + &dflags, sizeof(dflags)); + if (ret != 0) + return (P2T(ret)); + + if (suspend) + dflags |= TMDF_DONOTRUNUSER; + else + dflags &= ~TMDF_DONOTRUNUSER; + ret = ps_pdwrite(ta->ph, + tmbx_addr + offsetof(struct kse_thr_mailbox, tm_dflags), + &dflags, sizeof(dflags)); + return (P2T(ret)); +} + +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_dbresume(const td_thrhandle_t *th) +{ + TDBG_FUNC(); + return pt_dbsuspend(th, 0); +} + +static td_err_e +pt_ta_activated(pt_thragent_t *ta, int *a) +{ + int ret; + + TDBG_FUNC(); + + if (ta->thread_activated) { + *a = ta->thread_activated; + return (TD_OK); + } + ret = ps_pdread(ta->ph, ta->thread_activated_addr, + &ta->thread_activated, sizeof(int)); + if (ret == 0) + *a = ta->thread_activated; + return (P2T(ret)); +} + +static td_err_e +pt_thr_sstep(td_thrhandle_t *th, int step) +{ + struct kse_thr_mailbox tmbx; + struct reg regs; + pt_thragent_t *ta = (pt_thragent_t *)th->th_ta_p; + psaddr_t tcb_addr, tmbx_addr; + uint32_t tmp; + lwpid_t lwp; + int ret; + + TDBG_FUNC(); + + ret = pt_validate(th); + if (ret) + return (ret); + + if (ta->map[th->th_unique].type == PT_LWP) { + /* Let debugger deal with single step flag in in kernel */ + return (0); + } + + ret = ps_pdread(ta->ph, ta->map[th->th_unique].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 */ + tmp = step ? TMDF_SSTEP : 0; + ret = ps_pdwrite(ta->ph, tcb_addr + offsetof(struct tcb, + tcb_tmbx.tm_dflags), &tmp, sizeof(tmp)); + if (ret != 0) + return (P2T(ret)); + /* Get lwp */ + ret = ps_pdread(ta->ph, tcb_addr + offsetof(struct tcb, + tcb_tmbx.tm_lwp), &lwp, sizeof(lwpid_t)); + if (ret != 0) + return (P2T(ret)); + if (lwp != 0) /* Let debugger deal with single step flag in in kernel */ + 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_pdread(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_pdwrite(ta->ph, tmbx_addr, &tmbx, + sizeof(tmbx)); + } + } + return (P2T(ret)); +} + +static long +_map_thread(pt_thragent_t *ta, psaddr_t pt, int type) +{ + struct pt_map *new; + int i, first = -1; + + /* leave zero out */ + for (i = 1; i < ta->map_len; ++i) { + if (ta->map[i].type == PT_NONE) { + if (first == -1) + first = i; + } else if (ta->map[i].type == type && ta->map[i].thr == pt) { + return (i); + } + } + + if (first == -1) { + if (ta->map_len == 0) { + ta->map = calloc(20, sizeof(struct pt_map)); + if (ta->map == NULL) + return (-1); + ta->map_len = 20; + first = 1; + } else { + new = realloc(ta->map, + sizeof(struct pt_map) * ta->map_len * 2); + if (new == NULL) + return (-1); + memset(new + ta->map_len, '\0', sizeof(struct pt_map) * + ta->map_len); + first = ta->map_len; + ta->map = new; + ta->map_len *= 2; + } + } + + ta->map[first].type = type; + ta->map[first].thr = pt; + return (first); +} + +static long +pt_map_thread(const pt_thragent_t *ta, psaddr_t pt) +{ + return _map_thread((pt_thragent_t *)ta, pt, PT_USER); +} + +#if 0 +static long +pt_map_lwp(const pt_thragent_t *ta, lwpid_t lwp) +{ + return _map_thread((pt_thragent_t *)ta, (psaddr_t)lwp, PT_LWP); +} +#endif + +static void +pt_unmap_lwp(const pt_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) +{ + pt_thragent_t *ta = (pt_thragent_t *)th->th_ta_p; + + if (th->th_unique < 0 || th->th_unique >= ta->map_len || + ta->map[th->th_unique].type == PT_NONE) + return (TD_NOTHR); + return (TD_OK); +} + +struct ta_ops pthread_ops = { + .to_init = pt_init, + .to_ta_new = (void *)pt_ta_new, + .to_ta_delete = (void *)pt_ta_delete, + .to_ta_get_nthreads = (void *)pt_ta_get_nthreads, + .to_ta_get_ph = (void *)pt_ta_get_ph, + .to_ta_map_id2thr = (void *)pt_ta_map_id2thr, + .to_ta_map_lwp2thr = (void *)pt_ta_map_lwp2thr, + .to_ta_thr_iter = (void *)pt_ta_thr_iter, + .to_ta_tsd_iter = (void *)pt_ta_tsd_iter, + .to_ta_event_addr = (void *)pt_ta_event_addr, + .to_ta_set_event = (void *)pt_ta_set_event, + .to_ta_clear_event = (void *)pt_ta_clear_event, + .to_ta_event_getmsg = (void *)pt_ta_event_getmsg, + .to_ta_setconcurrency = (void *)pt_ta_setconcurrency, + .to_ta_enable_stats = (void *)pt_ta_enable_stats, + .to_ta_reset_stats = (void *)pt_ta_reset_stats, + .to_ta_get_stats = (void *)pt_ta_get_stats, + .to_thr_validate = pt_thr_validate, + .to_thr_get_info = pt_thr_get_info, + .to_thr_getfpregs = (void *)pt_thr_getfpregs, + .to_thr_getgregs = pt_thr_getgregs, + .to_thr_getxregs = pt_thr_getxregs, + .to_thr_getxregsize = pt_thr_getxregsize, + .to_thr_setfpregs = pt_thr_setfpregs, + .to_thr_setgregs = pt_thr_setgregs, + .to_thr_setxregs = pt_thr_setxregs, + .to_thr_event_enable = pt_thr_event_enable, + .to_thr_set_event = pt_thr_set_event, + .to_thr_clear_event = pt_thr_clear_event, + .to_thr_event_getmsg = pt_thr_event_getmsg, + .to_thr_setprio = pt_thr_setprio, + .to_thr_setsigpending = pt_thr_setsigpending, + .to_thr_sigsetmask = pt_thr_sigsetmask, + .to_thr_tsd = pt_thr_tsd, + .to_thr_dbsuspend = pt_thr_dbsuspend, + .to_thr_dbresume = pt_thr_dbresume, + .to_ta_activated = (void *)pt_ta_activated, + .to_thr_sstep = pt_thr_sstep +}; |
