#include "defs.h"
#include "gdb_assert.h"
#include <dlfcn.h>
#include "gdb_proc_service.h"
#include "gdb_thread_db.h"
#include "bfd.h"
#include "gdbthread.h"
#include "inferior.h"
#include "symfile.h"
#include "objfiles.h"
#include "target.h"
#include "regcache.h"
#ifndef LIBTHREAD_DB_SO
#define LIBTHREAD_DB_SO "libthread_db.so.1"
#endif
static struct target_ops thread_db_ops;
static struct target_ops *target_beneath;
static void (*target_new_objfile_chain) (struct objfile *objfile);
static int using_thread_db;
static int keep_thread_db;
static int thread_signals;
static sigset_t thread_stop_set;
static sigset_t thread_print_set;
static struct ps_prochandle proc_handle;
static td_thragent_t *thread_agent;
static td_err_e (*td_init_p) (void);
static td_err_e (*td_ta_new_p) (struct ps_prochandle *ps, td_thragent_t **ta);
static td_err_e (*td_ta_map_id2thr_p) (const td_thragent_t *ta, thread_t pt,
td_thrhandle_t *__th);
static td_err_e (*td_ta_map_lwp2thr_p) (const td_thragent_t *ta, lwpid_t lwpid,
td_thrhandle_t *th);
static td_err_e (*td_ta_thr_iter_p) (const td_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);
static td_err_e (*td_ta_event_addr_p) (const td_thragent_t *ta,
td_event_e event, td_notify_t *ptr);
static td_err_e (*td_ta_set_event_p) (const td_thragent_t *ta,
td_thr_events_t *event);
static td_err_e (*td_ta_event_getmsg_p) (const td_thragent_t *ta,
td_event_msg_t *msg);
static td_err_e (*td_thr_validate_p) (const td_thrhandle_t *th);
static td_err_e (*td_thr_get_info_p) (const td_thrhandle_t *th,
td_thrinfo_t *infop);
static td_err_e (*td_thr_getfpregs_p) (const td_thrhandle_t *th,
gdb_prfpregset_t *regset);
static td_err_e (*td_thr_getgregs_p) (const td_thrhandle_t *th,
prgregset_t gregs);
static td_err_e (*td_thr_setfpregs_p) (const td_thrhandle_t *th,
const gdb_prfpregset_t *fpregs);
static td_err_e (*td_thr_setgregs_p) (const td_thrhandle_t *th,
prgregset_t gregs);
static td_err_e (*td_thr_event_enable_p) (const td_thrhandle_t *th, int event);
static CORE_ADDR td_create_bp_addr;
static CORE_ADDR td_death_bp_addr;
static void thread_db_find_new_threads (void);
#define GET_PID(ptid) ptid_get_pid (ptid)
#define GET_LWP(ptid) ptid_get_lwp (ptid)
#define GET_THREAD(ptid) ptid_get_tid (ptid)
#define is_lwp(ptid) (GET_LWP (ptid) != 0)
#define is_thread(ptid) (GET_THREAD (ptid) != 0)
#define BUILD_LWP(lwp, pid) ptid_build (pid, lwp, 0)
#define BUILD_THREAD(tid, pid) ptid_build (pid, 0, tid)
struct private_thread_info
{
lwpid_t lwpid;
};
static char *
thread_db_err_str (td_err_e err)
{
static char buf[64];
switch (err)
{
case TD_OK:
return "generic 'call succeeded'";
case TD_ERR:
return "generic error";
case TD_NOTHR:
return "no thread to satisfy query";
case TD_NOSV:
return "no sync handle to satisfy query";
case TD_NOLWP:
return "no LWP to satisfy query";
case TD_BADPH:
return "invalid process handle";
case TD_BADTH:
return "invalid thread handle";
case TD_BADSH:
return "invalid synchronization handle";
case TD_BADTA:
return "invalid thread agent";
case TD_BADKEY:
return "invalid key";
case TD_NOMSG:
return "no event message for getmsg";
case TD_NOFPREGS:
return "FPU register set not available";
case TD_NOLIBTHREAD:
return "application not linked with libthread";
case TD_NOEVENT:
return "requested event is not supported";
case TD_NOCAPAB:
return "capability not available";
case TD_DBERR:
return "debugger service failed";
case TD_NOAPLIC:
return "operation not applicable to";
case TD_NOTSD:
return "no thread-specific data for this thread";
case TD_MALLOC:
return "malloc failed";
case TD_PARTIALREG:
return "only part of register set was written/read";
case TD_NOXREGS:
return "X register set not available for this thread";
default:
snprintf (buf, sizeof (buf), "unknown thread_db error '%d'", err);
return buf;
}
}
static char *
thread_db_state_str (td_thr_state_e state)
{
static char buf[64];
switch (state)
{
case TD_THR_STOPPED:
return "stopped by debugger";
case TD_THR_RUN:
return "runnable";
case TD_THR_ACTIVE:
return "active";
case TD_THR_ZOMBIE:
return "zombie";
case TD_THR_SLEEP:
return "sleeping";
case TD_THR_STOPPED_ASLEEP:
return "stopped by debugger AND blocked";
default:
snprintf (buf, sizeof (buf), "unknown thread_db state %d", state);
return buf;
}
}
static ptid_t
thread_from_lwp (ptid_t ptid)
{
td_thrinfo_t ti;
td_thrhandle_t th;
td_err_e err;
if (GET_LWP (ptid) == 0)
ptid = BUILD_LWP (GET_PID (ptid), GET_PID (ptid));
gdb_assert (is_lwp (ptid));
err = td_ta_map_lwp2thr_p (thread_agent, GET_LWP (ptid), &th);
if (err != TD_OK)
error ("Cannot find user-level thread for LWP %ld: %s",
GET_LWP (ptid), thread_db_err_str (err));
err = td_thr_get_info_p (&th, &ti);
if (err != TD_OK)
error ("Cannot get thread info: %s", thread_db_err_str (err));
return BUILD_THREAD (ti.ti_tid, GET_PID (ptid));
}
static ptid_t
lwp_from_thread (ptid_t ptid)
{
td_thrinfo_t ti;
td_thrhandle_t th;
td_err_e err;
if (!is_thread (ptid))
return ptid;
err = td_ta_map_id2thr_p (thread_agent, GET_THREAD (ptid), &th);
if (err != TD_OK)
error ("Cannot find thread %ld: %s",
(long) GET_THREAD (ptid), thread_db_err_str (err));
err = td_thr_get_info_p (&th, &ti);
if (err != TD_OK)
error ("Cannot get thread info: %s", thread_db_err_str (err));
return BUILD_LWP (ti.ti_lid, GET_PID (ptid));
}
void
thread_db_init (struct target_ops *target)
{
target_beneath = target;
}
static int
thread_db_load (void)
{
void *handle;
td_err_e err;
handle = dlopen (LIBTHREAD_DB_SO, RTLD_NOW);
if (handle == NULL)
return 0;
td_init_p = dlsym (handle, "td_init");
if (td_init_p == NULL)
return 0;
td_ta_new_p = dlsym (handle, "td_ta_new");
if (td_ta_new_p == NULL)
return 0;
td_ta_map_id2thr_p = dlsym (handle, "td_ta_map_id2thr");
if (td_ta_map_id2thr_p == NULL)
return 0;
td_ta_map_lwp2thr_p = dlsym (handle, "td_ta_map_lwp2thr");
if (td_ta_map_lwp2thr_p == NULL)
return 0;
td_ta_thr_iter_p = dlsym (handle, "td_ta_thr_iter");
if (td_ta_thr_iter_p == NULL)
return 0;
td_thr_validate_p = dlsym (handle, "td_thr_validate");
if (td_thr_validate_p == NULL)
return 0;
td_thr_get_info_p = dlsym (handle, "td_thr_get_info");
if (td_thr_get_info_p == NULL)
return 0;
td_thr_getfpregs_p = dlsym (handle, "td_thr_getfpregs");
if (td_thr_getfpregs_p == NULL)
return 0;
td_thr_getgregs_p = dlsym (handle, "td_thr_getgregs");
if (td_thr_getgregs_p == NULL)
return 0;
td_thr_setfpregs_p = dlsym (handle, "td_thr_setfpregs");
if (td_thr_setfpregs_p == NULL)
return 0;
td_thr_setgregs_p = dlsym (handle, "td_thr_setgregs");
if (td_thr_setgregs_p == NULL)
return 0;
err = td_init_p ();
if (err != TD_OK)
{
warning ("Cannot initialize libthread_db: %s", thread_db_err_str (err));
return 0;
}
td_ta_event_addr_p = dlsym (handle, "td_ta_event_addr");
td_ta_set_event_p = dlsym (handle, "td_ta_set_event");
td_ta_event_getmsg_p = dlsym (handle, "td_ta_event_getmsg");
td_thr_event_enable_p = dlsym (handle, "td_thr_event_enable");
return 1;
}
static void
enable_thread_event_reporting (void)
{
td_thr_events_t events;
td_notify_t notify;
td_err_e err;
if (td_ta_event_addr_p == NULL || td_ta_set_event_p == NULL
|| td_ta_event_getmsg_p == NULL || td_thr_event_enable_p == NULL)
return;
td_event_emptyset (&events);
td_event_addset (&events, TD_CREATE);
#if 0
td_event_addset (&events, TD_DEATH);
#endif
err = td_ta_set_event_p (thread_agent, &events);
if (err != TD_OK)
{
warning ("Unable to set global thread event mask: %s",
thread_db_err_str (err));
return;
}
remove_thread_event_breakpoints ();
err = td_ta_event_addr_p (thread_agent, TD_CREATE, ¬ify);
if (err != TD_OK)
{
warning ("Unable to get location for thread creation breakpoint: %s",
thread_db_err_str (err));
return;
}
td_create_bp_addr = (CORE_ADDR) notify.u.bptaddr;
create_thread_event_breakpoint (td_create_bp_addr);
err = td_ta_event_addr_p (thread_agent, TD_DEATH, ¬ify);
if (err != TD_OK)
{
warning ("Unable to get location for thread death breakpoint: %s",
thread_db_err_str (err));
return;
}
td_death_bp_addr = (CORE_ADDR) notify.u.bptaddr;
create_thread_event_breakpoint (td_death_bp_addr);
}
static void
disable_thread_event_reporting (void)
{
td_thr_events_t events;
td_event_emptyset (&events);
td_ta_set_event_p (thread_agent, &events);
remove_thread_event_breakpoints ();
td_create_bp_addr = 0;
td_death_bp_addr = 0;
}
static void
check_thread_signals (void)
{
#ifdef GET_THREAD_SIGNALS
if (!thread_signals)
{
sigset_t mask;
int i;
GET_THREAD_SIGNALS (&mask);
sigemptyset (&thread_stop_set);
sigemptyset (&thread_print_set);
for (i = 1; i < NSIG; i++)
{
if (sigismember (&mask, i))
{
if (signal_stop_update (target_signal_from_host (i), 0))
sigaddset (&thread_stop_set, i);
if (signal_print_update (target_signal_from_host (i), 0))
sigaddset (&thread_print_set, i);
thread_signals = 1;
}
}
}
#endif
}
static void
disable_thread_signals (void)
{
#ifdef GET_THREAD_SIGNALS
if (thread_signals)
{
int i;
for (i = 1; i < NSIG; i++)
{
if (sigismember (&thread_stop_set, i))
signal_stop_update (target_signal_from_host (i), 1);
if (sigismember (&thread_print_set, i))
signal_print_update (target_signal_from_host (i), 1);
}
thread_signals = 0;
}
#endif
}
static void
thread_db_new_objfile (struct objfile *objfile)
{
td_err_e err;
if (objfile == NULL || !target_has_execution)
{
if (using_thread_db)
{
gdb_assert (proc_handle.pid == 0);
unpush_target (&thread_db_ops);
using_thread_db = 0;
}
keep_thread_db = 0;
goto quit;
}
if (using_thread_db)
goto quit;
proc_handle.pid = GET_PID (inferior_ptid);
err = td_ta_new_p (&proc_handle, &thread_agent);
switch (err)
{
case TD_NOLIBTHREAD:
break;
case TD_OK:
push_target (&thread_db_ops);
using_thread_db = 1;
if (objfile == symfile_objfile)
{
gdb_assert (proc_handle.pid == 0);
keep_thread_db = 1;
}
if (proc_handle.pid != 0)
{
enable_thread_event_reporting ();
thread_db_find_new_threads ();
}
break;
default:
warning ("Cannot initialize thread debugging library: %s",
thread_db_err_str (err));
break;
}
quit:
if (target_new_objfile_chain)
target_new_objfile_chain (objfile);
}
static void
attach_thread (ptid_t ptid, const td_thrhandle_t *th_p,
const td_thrinfo_t *ti_p, int verbose)
{
struct thread_info *tp;
td_err_e err;
check_thread_signals ();
if (verbose)
printf_unfiltered ("[New %s]\n", target_pid_to_str (ptid));
tp = add_thread (ptid);
tp->private = xmalloc (sizeof (struct private_thread_info));
tp->private->lwpid = ti_p->ti_lid;
if (ti_p->ti_state == TD_THR_UNKNOWN || ti_p->ti_state == TD_THR_ZOMBIE)
return;
#ifdef ATTACH_LWP
ATTACH_LWP (BUILD_LWP (ti_p->ti_lid, GET_PID (ptid)), 0);
#endif
err = td_thr_event_enable_p (th_p, 1);
if (err != TD_OK)
error ("Cannot enable thread event reporting for %s: %s",
target_pid_to_str (ptid), thread_db_err_str (err));
}
static void
thread_db_attach (char *args, int from_tty)
{
target_beneath->to_attach (args, from_tty);
init_thread_list ();
proc_handle.pid = GET_PID (inferior_ptid);
enable_thread_event_reporting ();
thread_db_find_new_threads();
}
static void
detach_thread (ptid_t ptid, int verbose)
{
if (verbose)
printf_unfiltered ("[%s exited]\n", target_pid_to_str (ptid));
}
static void
thread_db_detach (char *args, int from_tty)
{
disable_thread_event_reporting ();
inferior_ptid = lwp_from_thread (inferior_ptid);
proc_handle.pid = 0;
target_beneath->to_detach (args, from_tty);
}
static void
thread_db_resume (ptid_t ptid, int step, enum target_signal signo)
{
struct cleanup *old_chain = save_inferior_ptid ();
if (GET_PID (ptid) == -1)
inferior_ptid = lwp_from_thread (inferior_ptid);
else if (is_thread (ptid))
ptid = lwp_from_thread (ptid);
target_beneath->to_resume (ptid, step, signo);
do_cleanups (old_chain);
}
static void
check_event (ptid_t ptid)
{
td_event_msg_t msg;
td_thrinfo_t ti;
td_err_e err;
CORE_ADDR stop_pc;
stop_pc = read_pc_pid (ptid) - DECR_PC_AFTER_BREAK;
if (stop_pc != td_create_bp_addr && stop_pc != td_death_bp_addr)
return;
err = td_ta_event_getmsg_p (thread_agent, &msg);
if (err != TD_OK)
{
if (err == TD_NOMSG)
return;
error ("Cannot get thread event message: %s", thread_db_err_str (err));
}
err = td_thr_get_info_p (msg.th_p, &ti);
if (err != TD_OK)
error ("Cannot get thread info: %s", thread_db_err_str (err));
ptid = BUILD_THREAD (ti.ti_tid, GET_PID (ptid));
switch (msg.event)
{
case TD_CREATE:
#if 0
if (stop_pc != td_create_bp_addr)
error ("Thread creation event doesn't match breakpoint.");
#endif
if (!in_thread_list (ptid))
attach_thread (ptid, msg.th_p, &ti, 1);
return;
case TD_DEATH:
#if 0
if (stop_pc != td_death_bp_addr)
error ("Thread death event doesn't match breakpoint.");
#endif
if (!in_thread_list (ptid))
error ("Spurious thread death event.");
detach_thread (ptid, 1);
return;
default:
error ("Spurious thread event.");
}
}
static ptid_t
thread_db_wait (ptid_t ptid, struct target_waitstatus *ourstatus, gdb_client_data client_data)
{
extern ptid_t trap_ptid;
if (GET_PID (ptid) != -1 && is_thread (ptid))
ptid = lwp_from_thread (ptid);
ptid = target_beneath->to_wait (ptid, ourstatus, client_data);
if (proc_handle.pid == 0)
return ptid;
if (ourstatus->kind == TARGET_WAITKIND_EXITED)
return pid_to_ptid (-1);
if (ourstatus->kind == TARGET_WAITKIND_STOPPED
&& ourstatus->value.sig == TARGET_SIGNAL_TRAP)
check_event (ptid);
if (!ptid_equal (trap_ptid, null_ptid))
trap_ptid = thread_from_lwp (trap_ptid);
return thread_from_lwp (ptid);
}
static int
thread_db_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, int write,
struct mem_attrib *attrib,
struct target_ops *target)
{
struct cleanup *old_chain = save_inferior_ptid ();
int xfer;
if (is_thread (inferior_ptid))
{
if (!target_thread_alive (inferior_ptid))
inferior_ptid = pid_to_ptid (GET_PID (inferior_ptid));
else
inferior_ptid = lwp_from_thread (inferior_ptid);
}
xfer = target_beneath->to_xfer_memory (memaddr, myaddr, len, write, attrib, target);
do_cleanups (old_chain);
return xfer;
}
static void
thread_db_fetch_registers (int regno)
{
td_thrhandle_t th;
prgregset_t gregset;
gdb_prfpregset_t fpregset;
td_err_e err;
if (!is_thread (inferior_ptid))
{
target_beneath->to_fetch_registers (regno);
return;
}
err = td_ta_map_id2thr_p (thread_agent, GET_THREAD (inferior_ptid), &th);
if (err != TD_OK)
error ("Cannot find thread %ld: %s",
(long) GET_THREAD (inferior_ptid), thread_db_err_str (err));
err = td_thr_getgregs_p (&th, gregset);
if (err != TD_OK)
error ("Cannot fetch general-purpose registers for thread %ld: %s",
(long) GET_THREAD (inferior_ptid), thread_db_err_str (err));
err = td_thr_getfpregs_p (&th, &fpregset);
if (err != TD_OK)
error ("Cannot get floating-point registers for thread %ld: %s",
(long) GET_THREAD (inferior_ptid), thread_db_err_str (err));
supply_gregset ((gdb_gregset_t *) gregset);
supply_fpregset (&fpregset);
}
static void
thread_db_store_registers (int regno)
{
td_thrhandle_t th;
prgregset_t gregset;
gdb_prfpregset_t fpregset;
td_err_e err;
if (!is_thread (inferior_ptid))
{
target_beneath->to_store_registers (regno);
return;
}
err = td_ta_map_id2thr_p (thread_agent, GET_THREAD (inferior_ptid), &th);
if (err != TD_OK)
error ("Cannot find thread %ld: %s",
(long) GET_THREAD (inferior_ptid), thread_db_err_str (err));
if (regno != -1)
{
char raw[MAX_REGISTER_RAW_SIZE];
read_register_gen (regno, raw);
thread_db_fetch_registers (-1);
supply_register (regno, raw);
}
fill_gregset ((gdb_gregset_t *) gregset, -1);
fill_fpregset (&fpregset, -1);
err = td_thr_setgregs_p (&th, gregset);
if (err != TD_OK)
error ("Cannot store general-purpose registers for thread %ld: %s",
(long) GET_THREAD (inferior_ptid), thread_db_err_str (err));
err = td_thr_setfpregs_p (&th, &fpregset);
if (err != TD_OK)
error ("Cannot store floating-point registers for thread %ld: %s",
(long) GET_THREAD (inferior_ptid), thread_db_err_str (err));
}
static void
thread_db_kill (void)
{
inferior_ptid = lwp_from_thread (inferior_ptid);
target_beneath->to_kill ();
}
static void
thread_db_create_inferior (char *exec_file, char *allargs, char **env)
{
if (!keep_thread_db)
{
unpush_target (&thread_db_ops);
using_thread_db = 0;
}
target_beneath->to_create_inferior (exec_file, allargs, env);
}
static void
thread_db_post_startup_inferior (ptid_t ptid)
{
if (proc_handle.pid == 0)
{
proc_handle.pid = GET_PID (ptid);
enable_thread_event_reporting ();
thread_db_find_new_threads ();
}
}
static void
thread_db_mourn_inferior (void)
{
remove_thread_event_breakpoints ();
proc_handle.pid = 0;
target_beneath->to_mourn_inferior ();
}
static int
thread_db_thread_alive (ptid_t ptid)
{
td_thrhandle_t th;
td_thrinfo_t ti;
td_err_e err;
if (is_thread (ptid))
{
err = td_ta_map_id2thr_p (thread_agent, GET_THREAD (ptid), &th);
if (err != TD_OK)
return 0;
err = td_thr_validate_p (&th);
if (err != TD_OK)
return 0;
err = td_thr_get_info_p (&th, &ti);
if (err != TD_OK)
return 0;
if (ti.ti_state == TD_THR_UNKNOWN || ti.ti_state == TD_THR_ZOMBIE)
return 0;
return 1;
}
if (target_beneath->to_thread_alive)
return target_beneath->to_thread_alive (ptid);
return 0;
}
static int
find_new_threads_callback (const td_thrhandle_t *th_p, void *data)
{
td_thrinfo_t ti;
td_err_e err;
ptid_t ptid;
err = td_thr_get_info_p (th_p, &ti);
if (err != TD_OK)
error ("Cannot get thread info: %s", thread_db_err_str (err));
if (ti.ti_state == TD_THR_UNKNOWN || ti.ti_state == TD_THR_ZOMBIE)
return 0;
ptid = BUILD_THREAD (ti.ti_tid, GET_PID (inferior_ptid));
if (!in_thread_list (ptid))
attach_thread (ptid, th_p, &ti, 1);
return 0;
}
static void
thread_db_find_new_threads (void)
{
td_err_e err;
err = td_ta_thr_iter_p (thread_agent, find_new_threads_callback, NULL,
TD_THR_ANY_STATE, TD_THR_LOWEST_PRIORITY,
TD_SIGNO_MASK, TD_THR_ANY_USER_FLAGS);
if (err != TD_OK)
error ("Cannot find new threads: %s", thread_db_err_str (err));
}
static char *
thread_db_pid_to_str (ptid_t ptid)
{
if (is_thread (ptid))
{
static char buf[64];
td_thrhandle_t th;
td_thrinfo_t ti;
td_err_e err;
err = td_ta_map_id2thr_p (thread_agent, GET_THREAD (ptid), &th);
if (err != TD_OK)
error ("Cannot find thread %ld: %s",
(long) GET_THREAD (ptid), thread_db_err_str (err));
err = td_thr_get_info_p (&th, &ti);
if (err != TD_OK)
error ("Cannot get thread info for thread %ld: %s",
(long) GET_THREAD (ptid), thread_db_err_str (err));
if (ti.ti_state == TD_THR_ACTIVE && ti.ti_lid != 0)
{
snprintf (buf, sizeof (buf), "Thread %ld (LWP %d)",
(long) ti.ti_tid, ti.ti_lid);
}
else
{
snprintf (buf, sizeof (buf), "Thread %ld (%s)",
(long) ti.ti_tid, thread_db_state_str (ti.ti_state));
}
return buf;
}
if (target_beneath->to_pid_to_str (ptid))
return target_beneath->to_pid_to_str (ptid);
return normal_pid_to_str (ptid);
}
static void
init_thread_db_ops (void)
{
thread_db_ops.to_shortname = "multi-thread";
thread_db_ops.to_longname = "multi-threaded child process.";
thread_db_ops.to_doc = "Threads and pthreads support.";
thread_db_ops.to_attach = thread_db_attach;
thread_db_ops.to_detach = thread_db_detach;
thread_db_ops.to_resume = thread_db_resume;
thread_db_ops.to_wait = thread_db_wait;
thread_db_ops.to_fetch_registers = thread_db_fetch_registers;
thread_db_ops.to_store_registers = thread_db_store_registers;
thread_db_ops.to_xfer_memory = thread_db_xfer_memory;
thread_db_ops.to_kill = thread_db_kill;
thread_db_ops.to_create_inferior = thread_db_create_inferior;
thread_db_ops.to_post_startup_inferior = thread_db_post_startup_inferior;
thread_db_ops.to_mourn_inferior = thread_db_mourn_inferior;
thread_db_ops.to_thread_alive = thread_db_thread_alive;
thread_db_ops.to_find_new_threads = thread_db_find_new_threads;
thread_db_ops.to_pid_to_str = thread_db_pid_to_str;
thread_db_ops.to_stratum = thread_stratum;
thread_db_ops.to_has_thread_control = tc_schedlock;
thread_db_ops.to_magic = OPS_MAGIC;
}
void
_initialize_thread_db (void)
{
if (thread_db_load ())
{
init_thread_db_ops ();
add_target (&thread_db_ops);
target_new_objfile_chain = target_new_objfile_hook;
target_new_objfile_hook = thread_db_new_objfile;
}
}