sys/compat/mach/mach_thread.c

   1 /*      $NetBSD: mach_thread.c,v 1.48 2008/10/15 06:51:19 wrstuden Exp $ */
   2
   3 /*-
   4  * Copyright (c) 2002-2003 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Emmanuel Dreyfus
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 __KERNEL_RCSID(0, "$NetBSD: mach_thread.c,v 1.48 2008/10/15 06:51:19 wrstuden Exp $");
  34
  35 #include <sys/types.h>
  36 #include <sys/param.h>
  37 #include <sys/kernel.h>
  38 #include <sys/systm.h>
  39 #include <sys/signal.h>
  40 #include <sys/rwlock.h>
  41 #include <sys/queue.h>
  42 #include <sys/proc.h>
  43 #include <sys/resource.h>
  44 #include <sys/resourcevar.h>
  45 #include <sys/sa.h>
  46 #include <sys/savar.h>
  47
  48 #include <compat/mach/mach_types.h>
  49 #include <compat/mach/mach_message.h>
  50 #include <compat/mach/mach_exec.h>
  51 #include <compat/mach/mach_clock.h>
  52 #include <compat/mach/mach_port.h>
  53 #include <compat/mach/mach_task.h>
  54 #include <compat/mach/mach_thread.h>
  55 #include <compat/mach/mach_errno.h>
  56 #include <compat/mach/mach_services.h>
  57 #include <compat/mach/mach_syscallargs.h>
  58
  59 int
  60 mach_sys_syscall_thread_switch(struct lwp *l, const struct mach_sys_syscall_thread_switch_args *uap, register_t *retval)
  61 {
  62         /* {
  63                 syscallarg(mach_port_name_t) thread_name;
  64                 syscallarg(int) option;
  65                 syscallarg(mach_msg_timeout_t) option_time;
  66         } */
  67         int timeout;
  68         struct mach_emuldata *med;
  69
  70         med = (struct mach_emuldata *)l->l_proc->p_emuldata;
  71         timeout = SCARG(uap, option_time) * hz / 1000;
  72
  73         /*
  74          * The day we will be able to find out the struct proc from
  75          * the port number, try to use preempt() to call the right thread.
  76          * [- but preempt() is for _involuntary_ context switches.]
  77          */
  78         switch(SCARG(uap, option)) {
  79         case MACH_SWITCH_OPTION_NONE:
  80                 yield();
  81                 break;
  82
  83         case MACH_SWITCH_OPTION_WAIT:
  84                 med->med_thpri = 1;
  85                 while (med->med_thpri != 0)
  86                         (void)tsleep(&med->med_thpri, PZERO|PCATCH,
  87                             "thread_switch", timeout);
  88                 break;
  89
  90         case MACH_SWITCH_OPTION_DEPRESS:
  91         case MACH_SWITCH_OPTION_IDLE:
  92                 /* Use a callout to restore the priority after depression? */
  93                 med->med_thpri = l->l_priority;
  94                 l->l_priority = MAXPRI;
  95                 break;
  96
  97         default:
  98                 uprintf("mach_sys_syscall_thread_switch(): unknown option %d\n",                    SCARG(uap, option));
  99                 break;
 100         }
 101         return 0;
 102 }
 103
 104 int
 105 mach_sys_swtch_pri(struct lwp *l, const struct mach_sys_swtch_pri_args *uap, register_t *retval)
 106 {
 107         /* {
 108                 syscallarg(int) pri;
 109         } */
 110
 111         /*
 112          * Copied from preempt(9). We cannot just call preempt
 113          * because we want to return mi_switch(9) return value.
 114          */
 115         KERNEL_UNLOCK_ALL(l, &l->l_biglocks);
 116         lwp_lock(l);
 117         if (l->l_stat == LSONPROC)
 118                 l->l_proc->p_stats->p_ru.ru_nivcsw++;   /* XXXSMP */
 119         *retval = mi_switch(l);
 120         KERNEL_LOCK(l->l_biglocks, l);
 121
 122         return 0;
 123 }
 124
 125 int
 126 mach_sys_swtch(struct lwp *l, const void *v, register_t *retval)
 127 {
 128         struct mach_sys_swtch_pri_args cup;
 129
 130         SCARG(&cup, pri) = 0;
 131
 132         return mach_sys_swtch_pri(l, &cup, retval);
 133 }
 134
 135
 136 int
 137 mach_thread_policy(struct mach_trap_args *args)
 138 {
 139         mach_thread_policy_request_t *req = args->smsg;
 140         mach_thread_policy_reply_t *rep = args->rmsg;
 141         size_t *msglen = args->rsize;
 142         int end_offset;
 143
 144         /* Sanity check req_count */
 145         end_offset = req->req_count +
 146                      (sizeof(req->req_setlimit) / sizeof(req->req_base[0]));
 147         if (MACH_REQMSG_OVERFLOW(args, req->req_base[end_offset]))
 148                 return mach_msg_error(args, EINVAL);
 149
 150         uprintf("Unimplemented mach_thread_policy\n");
 151
 152         *msglen = sizeof(*rep);
 153         mach_set_header(rep, req, *msglen);
 154
 155         rep->rep_retval = 0;
 156
 157         mach_set_trailer(rep, *msglen);
 158
 159         return 0;
 160 }
 161
 162 /* XXX it might be possible to use this on another task */
 163 int
 164 mach_thread_create_running(struct mach_trap_args *args)
 165 {
 166         mach_thread_create_running_request_t *req = args->smsg;
 167         mach_thread_create_running_reply_t *rep = args->rmsg;
 168         size_t *msglen = args->rsize;
 169         struct lwp *l = args->l;
 170         struct proc *p = l->l_proc;
 171         struct mach_create_thread_child_args mctc;
 172         struct mach_right *child_mr;
 173         struct mach_lwp_emuldata *mle;
 174         vaddr_t uaddr;
 175         int flags;
 176         int error;
 177         int end_offset;
 178
 179         /* Sanity check req_count */
 180         end_offset = req->req_count;
 181         if (MACH_REQMSG_OVERFLOW(args, req->req_state[end_offset]))
 182                 return mach_msg_error(args, EINVAL);
 183
 184         /*
 185          * Prepare the data we want to transmit to the child.
 186          */
 187         mctc.mctc_flavor = req->req_flavor;
 188         mctc.mctc_oldlwp = l;
 189         mctc.mctc_child_done = 0;
 190         mctc.mctc_state = req->req_state;
 191
 192         uaddr = uvm_uarea_alloc();
 193         if (__predict_false(uaddr == 0))
 194                 return ENOMEM;
 195
 196         flags = 0;
 197         if ((error = lwp_create(l, p, uaddr, flags, NULL, 0,
 198             mach_create_thread_child, (void *)&mctc, &mctc.mctc_lwp,
 199             SCHED_OTHER)) != 0)
 200         {
 201                 uvm_uarea_free(uaddr);
 202                 return mach_msg_error(args, error);
 203         }
 204
 205         /*
 206          * Make the child runnable.
 207          */
 208         mutex_enter(p->p_lock);
 209         lwp_lock(mctc.mctc_lwp);
 210         mctc.mctc_lwp->l_private = 0;
 211         mctc.mctc_lwp->l_stat = LSRUN;
 212         sched_enqueue(mctc.mctc_lwp, false);
 213         p->p_nrlwps++;
 214         lwp_unlock(mctc.mctc_lwp);
 215         mutex_exit(p->p_lock);
 216
 217         /*
 218          * Get the child's kernel port
 219          */
 220         mle = mctc.mctc_lwp->l_emuldata;
 221         child_mr = mach_right_get(mle->mle_kernel, l, MACH_PORT_TYPE_SEND, 0);
 222
 223         /*
 224          * The child relies on some values in mctc, so we should not
 225          * exit until it is finished with it. We catch signals so that
 226          * the process can be killed with kill -9, but we loop to avoid
 227          * spurious wakeups due to other signals.
 228          */
 229         while(mctc.mctc_child_done == 0)
 230                 (void)tsleep(&mctc.mctc_child_done,
 231                     PZERO|PCATCH, "mach_thread", 0);
 232
 233         *msglen = sizeof(*rep);
 234         mach_set_header(rep, req, *msglen);
 235         mach_add_port_desc(rep, child_mr->mr_name);
 236         mach_set_trailer(rep, *msglen);
 237
 238         return 0;
 239 }
 240
 241 int
 242 mach_thread_info(struct mach_trap_args *args)
 243 {
 244         mach_thread_info_request_t *req = args->smsg;
 245         mach_thread_info_reply_t *rep = args->rmsg;
 246         size_t *msglen = args->rsize;
 247         struct lwp *l = args->l;
 248         struct lwp *tl = args->tl;
 249         struct proc *tp = tl->l_proc;
 250
 251         /* Sanity check req->req_count */
 252         if (req->req_count > 12)
 253                 return mach_msg_error(args, EINVAL);
 254
 255         rep->rep_count = req->req_count;
 256
 257         *msglen = sizeof(*rep) + ((req->req_count - 12) * sizeof(int));
 258         mach_set_header(rep, req, *msglen);
 259
 260         switch (req->req_flavor) {
 261         case MACH_THREAD_BASIC_INFO: {
 262                 struct mach_thread_basic_info *tbi;
 263
 264                 if (req->req_count != (sizeof(*tbi) / sizeof(int))) /* 10 */
 265                         return mach_msg_error(args, EINVAL);
 266
 267                 tbi = (struct mach_thread_basic_info *)rep->rep_out;
 268                 tbi->user_time.seconds = tp->p_uticks * hz / 1000000;
 269                 tbi->user_time.microseconds =
 270                     (tp->p_uticks) * hz - tbi->user_time.seconds;
 271                 tbi->system_time.seconds = tp->p_sticks * hz / 1000000;
 272                 tbi->system_time.microseconds =
 273                     (tp->p_sticks) * hz - tbi->system_time.seconds;
 274                 tbi->cpu_usage = tp->p_pctcpu;
 275                 tbi->policy = MACH_THREAD_STANDARD_POLICY;
 276
 277                 /* XXX this is not very accurate */
 278                 tbi->run_state = MACH_TH_STATE_RUNNING;
 279                 tbi->flags = 0;
 280                 switch (l->l_stat) {
 281                 case LSRUN:
 282                         tbi->run_state = MACH_TH_STATE_RUNNING;
 283                         break;
 284                 case LSSTOP:
 285                         tbi->run_state = MACH_TH_STATE_STOPPED;
 286                         break;
 287                 case LSSLEEP:
 288                         tbi->run_state = MACH_TH_STATE_WAITING;
 289                         break;
 290                 case LSIDL:
 291                         tbi->run_state = MACH_TH_STATE_RUNNING;
 292                         tbi->flags = MACH_TH_FLAGS_IDLE;
 293                         break;
 294                 default:
 295                         break;
 296                 }
 297
 298                 tbi->suspend_count = 0;
 299                 tbi->sleep_time = tl->l_slptime;
 300                 break;
 301         }
 302
 303         case MACH_THREAD_SCHED_TIMESHARE_INFO: {
 304                 struct mach_policy_timeshare_info *pti;
 305
 306                 if (req->req_count != (sizeof(*pti) / sizeof(int))) /* 5 */
 307                         return mach_msg_error(args, EINVAL);
 308
 309                 pti = (struct mach_policy_timeshare_info *)rep->rep_out;
 310
 311                 pti->max_priority = tl->l_priority;
 312                 pti->base_priority = tl->l_priority;
 313                 pti->cur_priority = tl->l_priority;
 314                 pti->depressed = 0;
 315                 pti->depress_priority = tl->l_priority;
 316                 break;
 317         }
 318
 319         case MACH_THREAD_SCHED_RR_INFO:
 320         case MACH_THREAD_SCHED_FIFO_INFO:
 321                 uprintf("Unimplemented thread_info flavor %d\n",
 322                     req->req_flavor);
 323         default:
 324                 return mach_msg_error(args, EINVAL);
 325                 break;
 326         }
 327
 328         mach_set_trailer(rep, *msglen);
 329
 330         return 0;
 331 }
 332
 333 int
 334 mach_thread_get_state(struct mach_trap_args *args)
 335 {
 336         mach_thread_get_state_request_t *req = args->smsg;
 337         mach_thread_get_state_reply_t *rep = args->rmsg;
 338         size_t *msglen = args->rsize;
 339         struct lwp *tl = args->tl;
 340         int error;
 341         int size;
 342
 343         /* Sanity check req->req_count */
 344         if (req->req_count > 144)
 345                 return mach_msg_error(args, EINVAL);
 346
 347         if ((error = mach_thread_get_state_machdep(tl,
 348             req->req_flavor, &rep->rep_state, &size)) != 0)
 349                 return mach_msg_error(args, error);
 350
 351         rep->rep_count = size / sizeof(int);
 352         *msglen = sizeof(*rep) + ((req->req_count - 144) * sizeof(int));
 353         mach_set_header(rep, req, *msglen);
 354         mach_set_trailer(rep, *msglen);
 355
 356         return 0;
 357 }
 358
 359 int
 360 mach_thread_set_state(struct mach_trap_args *args)
 361 {
 362         mach_thread_set_state_request_t *req = args->smsg;
 363         mach_thread_set_state_reply_t *rep = args->rmsg;
 364         size_t *msglen = args->rsize;
 365         struct lwp *tl = args->tl;
 366         int error;
 367         int end_offset;
 368
 369         /* Sanity check req_count */
 370         end_offset = req->req_count;
 371         if (MACH_REQMSG_OVERFLOW(args, req->req_state[end_offset]))
 372                 return mach_msg_error(args, EINVAL);
 373
 374         if ((error = mach_thread_set_state_machdep(tl,
 375             req->req_flavor, &req->req_state)) != 0)
 376                 return mach_msg_error(args, error);
 377
 378         *msglen = sizeof(*rep);
 379         mach_set_header(rep, req, *msglen);
 380
 381         rep->rep_retval = 0;
 382
 383         mach_set_trailer(rep, *msglen);
 384
 385         return 0;
 386 }
 387
 388 int
 389 mach_thread_suspend(struct mach_trap_args *args)
 390 {
 391         mach_thread_suspend_request_t *req = args->smsg;
 392         mach_thread_suspend_reply_t *rep = args->rmsg;
 393         size_t *msglen = args->rsize;
 394         struct lwp *l = args->l;
 395         struct lwp *tl = args->tl;
 396         struct proc *p = tl->l_proc;
 397         int error;
 398
 399         mutex_enter(p->p_lock);
 400         lwp_lock(tl);
 401         error = lwp_suspend(l, tl);
 402         mutex_exit(p->p_lock);
 403
 404         *msglen = sizeof(*rep);
 405         mach_set_header(rep, req, *msglen);
 406         rep->rep_retval = native_to_mach_errno[error];
 407         mach_set_trailer(rep, *msglen);
 408
 409         return 0;
 410 }
 411
 412 int
 413 mach_thread_resume(struct mach_trap_args *args)
 414 {
 415         mach_thread_resume_request_t *req = args->smsg;
 416         mach_thread_resume_reply_t *rep = args->rmsg;
 417         size_t *msglen = args->rsize;
 418         struct lwp *tl = args->tl;
 419         struct proc *p = tl->l_proc;
 420
 421         mutex_enter(p->p_lock);
 422         lwp_lock(tl);
 423         lwp_continue(tl);
 424         mutex_exit(p->p_lock);
 425
 426         *msglen = sizeof(*rep);
 427         mach_set_header(rep, req, *msglen);
 428         rep->rep_retval = 0;
 429         mach_set_trailer(rep, *msglen);
 430
 431         return 0;
 432 }
 433
 434 int
 435 mach_thread_abort(struct mach_trap_args *args)
 436 {
 437         mach_thread_abort_request_t *req = args->smsg;
 438         mach_thread_abort_reply_t *rep = args->rmsg;
 439         size_t *msglen = args->rsize;
 440         struct lwp *tl = args->tl;
 441
 442         lwp_exit(tl);
 443
 444         *msglen = sizeof(*rep);
 445         mach_set_header(rep, req, *msglen);
 446         rep->rep_retval = 0;
 447         mach_set_trailer(rep, *msglen);
 448
 449         return 0;
 450 }
 451
 452 int
 453 mach_thread_set_policy(struct mach_trap_args *args)
 454 {
 455         mach_thread_set_policy_request_t *req = args->smsg;
 456         mach_thread_set_policy_reply_t *rep = args->rmsg;
 457         size_t *msglen = args->rsize;
 458         struct lwp *tl = args->tl;
 459         mach_port_t mn;
 460         struct mach_right *mr;
 461         int limit_count_offset, limit_offset;
 462         int limit_count;
 463         int *limit;
 464
 465         limit_count_offset = req->req_base_count;
 466         if (MACH_REQMSG_OVERFLOW(args, req->req_base[limit_count_offset]))
 467                 return mach_msg_error(args, EINVAL);
 468
 469         limit_count = req->req_base[limit_count_offset];
 470         limit_offset = limit_count_offset +
 471             (sizeof(req->req_limit_count) / sizeof(req->req_base[0]));
 472         limit = &req->req_base[limit_offset];
 473         if (MACH_REQMSG_OVERFLOW(args, limit[limit_count]))
 474                 return mach_msg_error(args, EINVAL);
 475
 476         mn = req->req_pset.name;
 477         if ((mr = mach_right_check(mn, tl, MACH_PORT_TYPE_ALL_RIGHTS)) == NULL)
 478                 return mach_msg_error(args, EINVAL);
 479
 480         *msglen = sizeof(*rep);
 481         mach_set_header(rep, req, *msglen);
 482         rep->rep_retval = 0;
 483         mach_set_trailer(rep, *msglen);
 484
 485         return 0;
 486 }
 487