diff options
Diffstat (limited to 'lib/libthread_db/libpthread_db.c')
| -rw-r--r-- | lib/libthread_db/libpthread_db.c | 1145 |
1 files changed, 1145 insertions, 0 deletions
diff --git a/lib/libthread_db/libpthread_db.c b/lib/libthread_db/libpthread_db.c new file mode 100644 index 0000000..31ea15d --- /dev/null +++ b/lib/libthread_db/libpthread_db.c @@ -0,0 +1,1145 @@ +/* + * 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 <sys/types.h> +#include <sys/linker_set.h> +#include <sys/ptrace.h> +#include <proc_service.h> +#include <thread_db.h> + +#include "libpthread_db.h" +#include "kse.h" + +#define P2T(c) ps2td(c) + +static void pt_unmap_lwp(const td_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 long +pt_map_thread(const td_thragent_t *const_ta, psaddr_t pt, enum pt_type type) +{ + td_thragent_t *ta = __DECONST(td_thragent_t *, const_ta); + 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 td_err_e +pt_init(void) +{ + pt_md_init(); + return (0); +} + +static td_err_e +pt_ta_new(struct ps_prochandle *ph, td_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; \ + } + +#define LOOKUP_VAL(proc, sym, val) \ + ret = ps_pglobal_lookup(proc, NULL, sym, &vaddr);\ + if (ret != 0) { \ + TDBG("can not find symbol: %s\n", sym); \ + ret = TD_NOLIBTHREAD; \ + goto error; \ + } \ + ret = ps_pread(proc, vaddr, val, sizeof(int)); \ + if (ret != 0) { \ + TDBG("can not read value of %s\n", sym);\ + ret = TD_NOLIBTHREAD; \ + goto error; \ + } + + td_thragent_t *ta; + psaddr_t vaddr; + int dbg; + int ret; + + TDBG_FUNC(); + + ta = malloc(sizeof(td_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); + LOOKUP_VAL(ph, "_thread_off_dtv", &ta->thread_off_dtv); + LOOKUP_VAL(ph, "_thread_off_kse_locklevel", &ta->thread_off_kse_locklevel); + LOOKUP_VAL(ph, "_thread_off_kse", &ta->thread_off_kse); + LOOKUP_VAL(ph, "_thread_off_tlsindex", &ta->thread_off_tlsindex); + LOOKUP_VAL(ph, "_thread_off_attr_flags", &ta->thread_off_attr_flags); + LOOKUP_VAL(ph, "_thread_size_key", &ta->thread_size_key); + LOOKUP_VAL(ph, "_thread_off_tcb", &ta->thread_off_tcb); + LOOKUP_VAL(ph, "_thread_off_linkmap", &ta->thread_off_linkmap); + LOOKUP_VAL(ph, "_thread_off_tmbx", &ta->thread_off_tmbx); + LOOKUP_VAL(ph, "_thread_off_thr_locklevel", &ta->thread_off_thr_locklevel); + LOOKUP_VAL(ph, "_thread_off_next", &ta->thread_off_next); + LOOKUP_VAL(ph, "_thread_off_state", &ta->thread_off_state); + LOOKUP_VAL(ph, "_thread_max_keys", &ta->thread_max_keys); + LOOKUP_VAL(ph, "_thread_off_key_allocated", &ta->thread_off_key_allocated); + LOOKUP_VAL(ph, "_thread_off_key_destructor", &ta->thread_off_key_destructor); + LOOKUP_VAL(ph, "_thread_state_running", &ta->thread_state_running); + LOOKUP_VAL(ph, "_thread_state_zoombie", &ta->thread_state_zoombie); + LOOKUP_VAL(ph, "_thread_off_sigmask", &ta->thread_off_sigmask); + LOOKUP_VAL(ph, "_thread_off_sigpend", &ta->thread_off_sigpend); + dbg = getpid(); + /* + * If this fails it probably means we're debugging a core file and + * can't write to it. + */ + ps_pwrite(ph, ta->libkse_debug_addr, &dbg, sizeof(int)); + *pta = ta; + return (0); + +error: + free(ta); + return (ret); +} + +static td_err_e +pt_ta_delete(td_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_pwrite(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_map_id2thr(const td_thragent_t *ta, thread_t id, td_thrhandle_t *th) +{ + prgregset_t gregs; + 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 = thr_pread_ptr(ta, ta->thread_list_addr, &pt); + if (ret != 0) + return (TD_ERR); + 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 = thr_pread_ptr(ta, pt + ta->thread_off_tcb, + &tcb_addr); + if (ret != 0) + return (TD_ERR); + ret = thr_pread_int(ta, tcb_addr + ta->thread_off_tmbx + + offsetof(struct kse_thr_mailbox, tm_lwp), &lwp); + if (ret != 0) + return (TD_ERR); + /* + * 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 = thr_pread_ptr(ta, pt + ta->thread_off_next, &pt); + if (ret != 0) + return (TD_ERR); + } + /* check lwp */ + ret = ps_lgetregs(ta->ph, ta->map[id].lwp, gregs); + if (ret != PS_OK) { + /* no longer exists */ + ta->map[id].type = PT_NONE; + return (TD_NOTHR); + } + } else { + while (pt != 0 && ta->map[id].thr != pt) { + ret = thr_pread_ptr(ta, pt + ta->thread_off_tcb, + &tcb_addr); + if (ret != 0) + return (TD_ERR); + /* get next thread */ + ret = thr_pread_ptr(ta, pt + ta->thread_off_next, &pt); + if (ret != 0) + return (TD_ERR); + } + + if (pt == 0) { + /* no longer exists */ + ta->map[id].type = PT_NONE; + return (TD_NOTHR); + } + } + th->th_ta = ta; + th->th_tid = id; + th->th_thread = pt; + return (TD_OK); +} + +static td_err_e +pt_ta_map_lwp2thr(const td_thragent_t *ta, lwpid_t lwp, td_thrhandle_t *th) +{ + psaddr_t pt, tcb_addr; + lwpid_t lwp1; + int ret; + + TDBG_FUNC(); + + ret = thr_pread_ptr(ta, ta->thread_list_addr, &pt); + if (ret != 0) + return (TD_ERR); + while (pt != 0) { + ret = thr_pread_ptr(ta, pt + ta->thread_off_tcb, &tcb_addr); + if (ret != 0) + return (TD_ERR); + ret = thr_pread_int(ta, tcb_addr + ta->thread_off_tmbx + + offsetof(struct kse_thr_mailbox, tm_lwp), &lwp1); + if (ret != 0) + return (TD_ERR); + if (lwp1 == lwp) { + th->th_ta = ta; + th->th_tid = pt_map_thread(ta, pt, PT_USER); + if (th->th_tid == -1) + return (TD_MALLOC); + pt_unmap_lwp(ta, lwp); + th->th_thread = pt; + return (TD_OK); + } + + /* get next thread */ + ret = thr_pread_ptr(ta, pt + ta->thread_off_next, &pt); + if (ret != 0) + return (TD_ERR); + } + + return (TD_NOTHR); +} + +static td_err_e +pt_ta_thr_iter(const td_thragent_t *ta, td_thr_iter_f *callback, + void *cbdata_p, td_thr_state_e state __unused, int ti_pri __unused, + sigset_t *ti_sigmask_p __unused, unsigned int ti_user_flags __unused) +{ + td_thrhandle_t th; + psaddr_t pt; + ps_err_e pserr; + int activated, ret; + + TDBG_FUNC(); + + pserr = ps_pread(ta->ph, ta->thread_activated_addr, &activated, + sizeof(int)); + if (pserr != PS_OK) + return (P2T(pserr)); + if (!activated) + return (TD_OK); + + ret = thr_pread_ptr(ta, ta->thread_list_addr, &pt); + if (ret != 0) + return (TD_ERR); + while (pt != 0) { + th.th_ta = ta; + th.th_tid = pt_map_thread(ta, pt, PT_USER); + th.th_thread = pt; + /* should we unmap lwp here ? */ + if (th.th_tid == -1) + return (TD_MALLOC); + if ((*callback)(&th, cbdata_p)) + return (TD_DBERR); + /* get next thread */ + ret = thr_pread_ptr(ta, pt + ta->thread_off_next, &pt); + if (ret != 0) + return (TD_ERR); + } + return (TD_OK); +} + +static td_err_e +pt_ta_tsd_iter(const td_thragent_t *ta, td_key_iter_f *ki, void *arg) +{ + void *keytable; + void *destructor; + int i, ret, allocated; + + TDBG_FUNC(); + + keytable = malloc(ta->thread_max_keys * ta->thread_size_key); + if (keytable == NULL) + return (TD_MALLOC); + ret = ps_pread(ta->ph, (psaddr_t)ta->thread_keytable_addr, keytable, + ta->thread_max_keys * ta->thread_size_key); + if (ret != 0) { + free(keytable); + return (P2T(ret)); + } + for (i = 0; i < ta->thread_max_keys; i++) { + allocated = *(int *)(void *)((uintptr_t)keytable + + i * ta->thread_size_key + ta->thread_off_key_allocated); + destructor = *(void **)(void *)((uintptr_t)keytable + + i * ta->thread_size_key + ta->thread_off_key_destructor); + if (allocated) { + ret = (ki)(i, destructor, arg); + if (ret != 0) { + free(keytable); + return (TD_DBERR); + } + } + } + free(keytable); + return (TD_OK); +} + +static td_err_e +pt_ta_event_addr(const td_thragent_t *ta __unused, td_event_e event __unused, + td_notify_t *ptr __unused) +{ + TDBG_FUNC(); + return (TD_ERR); +} + +static td_err_e +pt_ta_set_event(const td_thragent_t *ta __unused, + td_thr_events_t *events __unused) +{ + TDBG_FUNC(); + return (0); +} + +static td_err_e +pt_ta_clear_event(const td_thragent_t *ta __unused, + td_thr_events_t *events __unused) +{ + TDBG_FUNC(); + return (0); +} + +static td_err_e +pt_ta_event_getmsg(const td_thragent_t *ta __unused, + td_event_msg_t *msg __unused) +{ + TDBG_FUNC(); + return (TD_NOMSG); +} + +static td_err_e +pt_dbsuspend(const td_thrhandle_t *th, int suspend) +{ + const td_thragent_t *ta = th->th_ta; + psaddr_t tcb_addr, tmbx_addr, ptr; + lwpid_t lwp; + uint32_t dflags; + int attrflags, locklevel, ret; + + TDBG_FUNC(); + + ret = pt_validate(th); + if (ret) + return (ret); + + if (ta->map[th->th_tid].type == PT_LWP) { + if (suspend) + ret = ps_lstop(ta->ph, ta->map[th->th_tid].lwp); + else + ret = ps_lcontinue(ta->ph, ta->map[th->th_tid].lwp); + return (P2T(ret)); + } + + ret = ps_pread(ta->ph, ta->map[th->th_tid].thr + + ta->thread_off_attr_flags, + &attrflags, sizeof(attrflags)); + if (ret != 0) + return (P2T(ret)); + ret = ps_pread(ta->ph, ta->map[th->th_tid].thr + + ta->thread_off_tcb, + &tcb_addr, sizeof(tcb_addr)); + if (ret != 0) + return (P2T(ret)); + tmbx_addr = tcb_addr + ta->thread_off_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) { + /* don't suspend signal thread */ + if (attrflags & 0x200) + return (0); + if (attrflags & PTHREAD_SCOPE_SYSTEM) { + /* + * don't suspend system scope thread if it is holding + * some low level locks + */ + ptr = ta->map[th->th_tid].thr + ta->thread_off_kse; + ret = ps_pread(ta->ph, ptr, &ptr, sizeof(ptr)); + if (ret != 0) + return (P2T(ret)); + ret = ps_pread(ta->ph, ptr + ta->thread_off_kse_locklevel, + &locklevel, sizeof(int)); + if (ret != 0) + return (P2T(ret)); + if (locklevel <= 0) { + ptr = ta->map[th->th_tid].thr + + ta->thread_off_thr_locklevel; + ret = ps_pread(ta->ph, ptr, &locklevel, + sizeof(int)); + if (ret != 0) + return (P2T(ret)); + } + if (suspend) { + if (locklevel <= 0) + ret = ps_lstop(ta->ph, lwp); + } else { + ret = ps_lcontinue(ta->ph, lwp); + } + if (ret != 0) + return (P2T(ret)); + /* FALLTHROUGH */ + } else { + struct ptrace_lwpinfo pl; + + if (ps_linfo(ta->ph, lwp, (caddr_t)&pl)) + return (TD_ERR); + if (suspend) { + if (!(pl.pl_flags & PL_FLAG_BOUND)) + ret = ps_lstop(ta->ph, lwp); + } else { + ret = ps_lcontinue(ta->ph, lwp); + } + if (ret != 0) + return (P2T(ret)); + /* FALLTHROUGH */ + } + } + /* read tm_dflags */ + ret = ps_pread(ta->ph, + tmbx_addr + offsetof(struct kse_thr_mailbox, tm_dflags), + &dflags, sizeof(dflags)); + if (ret != 0) + return (P2T(ret)); + if (suspend) + dflags |= TMDF_SUSPEND; + else + dflags &= ~TMDF_SUSPEND; + ret = ps_pwrite(ta->ph, + tmbx_addr + offsetof(struct kse_thr_mailbox, tm_dflags), + &dflags, sizeof(dflags)); + return (P2T(ret)); +} + +static td_err_e +pt_thr_dbresume(const td_thrhandle_t *th) +{ + 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_old_get_info(const td_thrhandle_t *th, td_old_thrinfo_t *info) +{ + const td_thragent_t *ta = th->th_ta; + struct ptrace_lwpinfo linfo; + psaddr_t tcb_addr; + uint32_t dflags; + lwpid_t lwp; + int state; + int ret; + int attrflags; + + TDBG_FUNC(); + + bzero(info, sizeof(*info)); + 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, ta->map[th->th_tid].thr + + ta->thread_off_attr_flags, + &attrflags, sizeof(attrflags)); + if (ret != 0) + return (P2T(ret)); + ret = ps_pread(ta->ph, ta->map[th->th_tid].thr + ta->thread_off_tcb, + &tcb_addr, sizeof(tcb_addr)); + if (ret != 0) + return (P2T(ret)); + ret = ps_pread(ta->ph, ta->map[th->th_tid].thr + ta->thread_off_state, + &state, sizeof(state)); + ret = ps_pread(ta->ph, + tcb_addr + ta->thread_off_tmbx + + offsetof(struct kse_thr_mailbox, tm_lwp), + &info->ti_lid, sizeof(lwpid_t)); + if (ret != 0) + return (P2T(ret)); + ret = ps_pread(ta->ph, + tcb_addr + ta->thread_off_tmbx + + offsetof(struct kse_thr_mailbox, tm_dflags), + &dflags, sizeof(dflags)); + if (ret != 0) + return (P2T(ret)); + ret = ps_pread(ta->ph, tcb_addr + ta->thread_off_tmbx + + offsetof(struct kse_thr_mailbox, tm_lwp), &lwp, sizeof(lwpid_t)); + if (ret != 0) + return (P2T(ret)); + info->ti_ta_p = th->th_ta; + info->ti_tid = th->th_tid; + + if (attrflags & PTHREAD_SCOPE_SYSTEM) { + ret = ps_linfo(ta->ph, lwp, &linfo); + if (ret == PS_OK) { + info->ti_sigmask = linfo.pl_sigmask; + info->ti_pending = linfo.pl_siglist; + } else + return (ret); + } else { + ret = ps_pread(ta->ph, + ta->map[th->th_tid].thr + ta->thread_off_sigmask, + &info->ti_sigmask, sizeof(sigset_t)); + if (ret) + return (ret); + ret = ps_pread(ta->ph, + ta->map[th->th_tid].thr + ta->thread_off_sigpend, + &info->ti_pending, sizeof(sigset_t)); + if (ret) + return (ret); + } + + if (state == ta->thread_state_running) + info->ti_state = TD_THR_RUN; + else if (state == ta->thread_state_zoombie) + info->ti_state = TD_THR_ZOMBIE; + else + info->ti_state = TD_THR_SLEEP; + info->ti_db_suspended = ((dflags & TMDF_SUSPEND) != 0); + info->ti_type = TD_THR_USER; + return (0); +} + +static td_err_e +pt_thr_get_info(const td_thrhandle_t *th, td_thrinfo_t *info) +{ + td_err_e e; + + e = pt_thr_old_get_info(th, (td_old_thrinfo_t *)info); + bzero(&info->ti_siginfo, sizeof(info->ti_siginfo)); + return (e); +} + +#ifdef __i386__ +static td_err_e +pt_thr_getxmmregs(const td_thrhandle_t *th, char *fxsave) +{ + 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; + + return TD_ERR; + + TDBG_FUNC(); + + ret = pt_validate(th); + if (ret) + return (ret); + + if (ta->map[th->th_tid].type == PT_LWP) { + ret = ps_lgetxmmregs(ta->ph, ta->map[th->th_tid].lwp, fxsave); + return (P2T(ret)); + } + + ret = ps_pread(ta->ph, ta->map[th->th_tid].thr + ta->thread_off_tcb, + &tcb_addr, sizeof(tcb_addr)); + if (ret != 0) + return (P2T(ret)); + tmbx_addr = tcb_addr + ta->thread_off_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_lgetxmmregs(ta->ph, lwp, fxsave); + return (P2T(ret)); + } + + ret = ps_pread(ta->ph, tmbx_addr, &tmbx, sizeof(tmbx)); + if (ret != 0) + return (P2T(ret)); + pt_ucontext_to_fxsave(&tmbx.tm_context, fxsave); + return (0); +} +#endif + +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 + ta->thread_off_tcb, + &tcb_addr, sizeof(tcb_addr)); + if (ret != 0) + return (P2T(ret)); + tmbx_addr = tcb_addr + ta->thread_off_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 + ta->thread_off_tcb, + &tcb_addr, sizeof(tcb_addr)); + if (ret != 0) + return (P2T(ret)); + tmbx_addr = tcb_addr + ta->thread_off_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); +} + +#ifdef __i386__ +static td_err_e +pt_thr_setxmmregs(const td_thrhandle_t *th, const char *fxsave) +{ + 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; + + return TD_ERR; + + TDBG_FUNC(); + + ret = pt_validate(th); + if (ret) + return (ret); + + if (ta->map[th->th_tid].type == PT_LWP) { + ret = ps_lsetxmmregs(ta->ph, ta->map[th->th_tid].lwp, fxsave); + return (P2T(ret)); + } + + ret = ps_pread(ta->ph, ta->map[th->th_tid].thr + + ta->thread_off_tcb, + &tcb_addr, sizeof(tcb_addr)); + if (ret != 0) + return (P2T(ret)); + tmbx_addr = tcb_addr + ta->thread_off_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_lsetxmmregs(ta->ph, lwp, fxsave); + 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_fxsave_to_ucontext(fxsave, &tmbx.tm_context); + ret = ps_pwrite(ta->ph, tmbx_addr, &tmbx, sizeof(tmbx)); + return (P2T(ret)); +} +#endif + +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 + + ta->thread_off_tcb, + &tcb_addr, sizeof(tcb_addr)); + if (ret != 0) + return (P2T(ret)); + tmbx_addr = tcb_addr + ta->thread_off_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 + + ta->thread_off_tcb, + &tcb_addr, sizeof(tcb_addr)); + if (ret != 0) + return (P2T(ret)); + tmbx_addr = tcb_addr + ta->thread_off_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 __unused, int en __unused) +{ + TDBG_FUNC(); + return (0); +} + +static td_err_e +pt_thr_set_event(const td_thrhandle_t *th __unused, + td_thr_events_t *setp __unused) +{ + TDBG_FUNC(); + return (0); +} + +static td_err_e +pt_thr_clear_event(const td_thrhandle_t *th __unused, + td_thr_events_t *setp __unused) +{ + TDBG_FUNC(); + return (0); +} + +static td_err_e +pt_thr_event_getmsg(const td_thrhandle_t *th __unused, + td_event_msg_t *msg __unused) +{ + 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 + + ta->thread_off_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 + ta->thread_off_tmbx + + offsetof(struct kse_thr_mailbox, 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 + ta->thread_off_tmbx + + offsetof(struct kse_thr_mailbox, tm_dflags), + &dflags, sizeof(uint32_t)); + if (ret != 0) + return (P2T(ret)); + /* Get lwp */ + ret = ps_pread(ta->ph, + tcb_addr + ta->thread_off_tmbx + + offsetof(struct kse_thr_mailbox, tm_lwp), + &lwp, sizeof(lwpid_t)); + if (ret != 0) + return (P2T(ret)); + if (lwp != 0) + return (0); + + tmbx_addr = tcb_addr + ta->thread_off_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); +} + +static td_err_e +pt_thr_tls_get_addr(const td_thrhandle_t *th, psaddr_t _linkmap, size_t offset, + psaddr_t *address) +{ + const td_thragent_t *ta = th->th_ta; + psaddr_t dtv_addr, obj_entry, tcb_addr; + int tls_index, ret; + + /* linkmap is a member of Obj_Entry */ + obj_entry = _linkmap - ta->thread_off_linkmap; + + /* get tlsindex of the object file */ + ret = ps_pread(ta->ph, + obj_entry + ta->thread_off_tlsindex, + &tls_index, sizeof(tls_index)); + if (ret != 0) + return (P2T(ret)); + + /* get thread tcb */ + ret = ps_pread(ta->ph, ta->map[th->th_tid].thr + + ta->thread_off_tcb, + &tcb_addr, sizeof(tcb_addr)); + if (ret != 0) + return (P2T(ret)); + + /* get dtv array address */ + ret = ps_pread(ta->ph, tcb_addr + ta->thread_off_dtv, + &dtv_addr, sizeof(dtv_addr)); + if (ret != 0) + return (P2T(ret)); + /* now get the object's tls block base address */ + ret = ps_pread(ta->ph, dtv_addr + sizeof(void *) * (tls_index + 1), + address, sizeof(*address)); + if (ret != 0) + return (P2T(ret)); + + *address += offset; + 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_old_get_info = pt_thr_old_get_info, + .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, + .to_thr_tls_get_addr = pt_thr_tls_get_addr, + + /* FreeBSD specific extensions. */ + .to_thr_sstep = pt_thr_sstep, +#ifdef __i386__ + .to_thr_getxmmregs = pt_thr_getxmmregs, + .to_thr_setxmmregs = pt_thr_setxmmregs, +#endif +}; + +DATA_SET(__ta_ops, libpthread_db_ops); |
