granicus.if.org Git - strace/blob - ipc.c

   1 /*
   2  * Copyright (c) 1993 Ulrich Pegelow <pegelow@moorea.uni-muenster.de>
   3  * Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
   4  * Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
   5  * Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. The name of the author may not be used to endorse or promote products
  17  *    derived from this software without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  20  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  21  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  22  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  23  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  24  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  28  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29  *
  30  *      $Id$
  31  */
  32
  33 #include "defs.h"
  34
  35 #if defined(LINUX) || defined(SUNOS4) || defined(FREEBSD)
  36
  37 # ifdef HAVE_MQUEUE_H
  38 #  include <mqueue.h>
  39 # endif
  40
  41 #include <fcntl.h>
  42 #include <sys/ipc.h>
  43 #include <sys/sem.h>
  44 #include <sys/msg.h>
  45 #include <sys/shm.h>
  46
  47 #ifndef MSG_STAT
  48 #define MSG_STAT 11
  49 #endif
  50 #ifndef MSG_INFO
  51 #define MSG_INFO 12
  52 #endif
  53 #ifndef SHM_STAT
  54 #define SHM_STAT 13
  55 #endif
  56 #ifndef SHM_INFO
  57 #define SHM_INFO 14
  58 #endif
  59 #ifndef SEM_STAT
  60 #define SEM_STAT 18
  61 #endif
  62 #ifndef SEM_INFO
  63 #define SEM_INFO 19
  64 #endif
  65
  66 #if defined LINUX && !defined IPC_64
  67 # define IPC_64 0x100
  68 #endif
  69
  70 extern void printsigevent(struct tcb *tcp, long arg);
  71
  72 static const struct xlat msgctl_flags[] = {
  73         { IPC_RMID,     "IPC_RMID"      },
  74         { IPC_SET,      "IPC_SET"       },
  75         { IPC_STAT,     "IPC_STAT"      },
  76 #ifdef LINUX
  77         { IPC_INFO,     "IPC_INFO"      },
  78         { MSG_STAT,     "MSG_STAT"      },
  79         { MSG_INFO,     "MSG_INFO"      },
  80 #endif /* LINUX */
  81         { 0,            NULL            },
  82 };
  83
  84 static const struct xlat semctl_flags[] = {
  85         { IPC_RMID,     "IPC_RMID"      },
  86         { IPC_SET,      "IPC_SET"       },
  87         { IPC_STAT,     "IPC_STAT"      },
  88 #ifdef LINUX
  89         { IPC_INFO,     "IPC_INFO"      },
  90         { SEM_STAT,     "SEM_STAT"      },
  91         { SEM_INFO,     "SEM_INFO"      },
  92 #endif /* LINUX */
  93         { GETPID,       "GETPID"        },
  94         { GETVAL,       "GETVAL"        },
  95         { GETALL,       "GETALL"        },
  96         { GETNCNT,      "GETNCNT"       },
  97         { GETZCNT,      "GETZCNT"       },
  98         { SETVAL,       "SETVAL"        },
  99         { SETALL,       "SETALL"        },
 100         { 0,            NULL            },
 101 };
 102
 103 static const struct xlat shmctl_flags[] = {
 104         { IPC_RMID,     "IPC_RMID"      },
 105         { IPC_SET,      "IPC_SET"       },
 106         { IPC_STAT,     "IPC_STAT"      },
 107 #ifdef LINUX
 108         { IPC_INFO,     "IPC_INFO"      },
 109         { SHM_STAT,     "SHM_STAT"      },
 110         { SHM_INFO,     "SHM_INFO"      },
 111 #endif /* LINUX */
 112 #ifdef SHM_LOCK
 113         { SHM_LOCK,     "SHM_LOCK"      },
 114 #endif
 115 #ifdef SHM_UNLOCK
 116         { SHM_UNLOCK,   "SHM_UNLOCK"    },
 117 #endif
 118         { 0,            NULL            },
 119 };
 120
 121 static const struct xlat resource_flags[] = {
 122         { IPC_CREAT,    "IPC_CREAT"     },
 123         { IPC_EXCL,     "IPC_EXCL"      },
 124         { IPC_NOWAIT,   "IPC_NOWAIT"    },
 125         { 0,            NULL            },
 126 };
 127
 128 static const struct xlat shm_resource_flags[] = {
 129         { IPC_CREAT,    "IPC_CREAT"     },
 130         { IPC_EXCL,     "IPC_EXCL"      },
 131 #ifdef SHM_HUGETLB
 132         { SHM_HUGETLB,  "SHM_HUGETLB"   },
 133 #endif
 134         { 0,            NULL            },
 135 };
 136
 137 static const struct xlat shm_flags[] = {
 138 #ifdef LINUX
 139         { SHM_REMAP,    "SHM_REMAP"     },
 140 #endif /* LINUX */
 141         { SHM_RDONLY,   "SHM_RDONLY"    },
 142         { SHM_RND,      "SHM_RND"       },
 143         { 0,            NULL            },
 144 };
 145
 146 static const struct xlat msg_flags[] = {
 147         { MSG_NOERROR,  "MSG_NOERROR"   },
 148 #ifdef LINUX
 149         { MSG_EXCEPT,   "MSG_EXCEPT"    },
 150 #endif /* LINUX */
 151         { IPC_NOWAIT,   "IPC_NOWAIT"    },
 152         { 0,            NULL            },
 153 };
 154
 155 static const struct xlat semop_flags[] = {
 156         { SEM_UNDO,     "SEM_UNDO"      },
 157         { IPC_NOWAIT,   "IPC_NOWAIT"    },
 158         { 0,            NULL            },
 159 };
 160
 161 int sys_msgget(tcp)
 162 struct tcb *tcp;
 163 {
 164         if (entering(tcp)) {
 165                 if (tcp->u_arg[0])
 166                         tprintf("%#lx", tcp->u_arg[0]);
 167                 else
 168                         tprintf("IPC_PRIVATE");
 169                 tprintf(", ");
 170                 if (printflags(resource_flags, tcp->u_arg[1] & ~0777, NULL) != 0)
 171                         tprintf("|");
 172                 tprintf("%#lo", tcp->u_arg[1] & 0777);
 173         }
 174         return 0;
 175 }
 176
 177 #ifdef IPC_64
 178 # define PRINTCTL(flagset, arg, dflt) \
 179         if ((arg) & IPC_64) tprintf("IPC_64|"); \
 180         printxval((flagset), (arg) &~ IPC_64, dflt)
 181 #else
 182 # define PRINTCTL printxval
 183 #endif
 184
 185 static int
 186 indirect_ipccall(tcp)
 187 struct tcb *tcp;
 188 {
 189 #ifdef LINUX
 190 #ifdef X86_64
 191         return current_personality > 0;
 192 #endif
 193 #if defined IA64
 194         return tcp->scno < 1024; /* ia32 emulation syscalls are low */
 195 #endif
 196 #if !defined MIPS && !defined HPPA
 197         return 1;
 198 #endif
 199 #endif  /* LINUX */
 200         return 0;
 201 }
 202
 203 int sys_msgctl(tcp)
 204 struct tcb *tcp;
 205 {
 206         if (entering(tcp)) {
 207                 tprintf("%lu, ", tcp->u_arg[0]);
 208                 PRINTCTL(msgctl_flags, tcp->u_arg[1], "MSG_???");
 209                 tprintf(", %#lx", tcp->u_arg[indirect_ipccall(tcp) ? 3 : 2]);
 210         }
 211         return 0;
 212 }
 213
 214 static void
 215 tprint_msgsnd(struct tcb *tcp, long addr, unsigned long count,
 216               unsigned long flags)
 217 {
 218         long mtype;
 219
 220         if (umove(tcp, addr, &mtype) < 0) {
 221                 tprintf("%#lx", addr);
 222         } else {
 223                 tprintf("{%lu, ", mtype);
 224                 printstr(tcp, addr + sizeof(mtype), count);
 225                 tprintf("}");
 226         }
 227         tprintf(", %lu, ", count);
 228         printflags(msg_flags, flags, "MSG_???");
 229 }
 230
 231 int sys_msgsnd(struct tcb *tcp)
 232 {
 233         if (entering(tcp)) {
 234                 tprintf("%d, ", (int) tcp->u_arg[0]);
 235                 if (indirect_ipccall(tcp)) {
 236                         tprint_msgsnd(tcp, tcp->u_arg[3], tcp->u_arg[1],
 237                                       tcp->u_arg[2]);
 238                 } else {
 239                         tprint_msgsnd(tcp, tcp->u_arg[1], tcp->u_arg[2],
 240                                       tcp->u_arg[3]);
 241                 }
 242         }
 243         return 0;
 244 }
 245
 246 static void
 247 tprint_msgrcv(struct tcb *tcp, long addr, unsigned long count, long msgtyp)
 248 {
 249         long mtype;
 250
 251         if (syserror(tcp) || umove(tcp, addr, &mtype) < 0) {
 252                 tprintf("%#lx", addr);
 253         } else {
 254                 tprintf("{%lu, ", mtype);
 255                 printstr(tcp, addr + sizeof(mtype), count);
 256                 tprintf("}");
 257         }
 258         tprintf(", %lu, %ld, ", count, msgtyp);
 259 }
 260
 261 int sys_msgrcv(struct tcb *tcp)
 262 {
 263         if (entering(tcp)) {
 264                 tprintf("%d, ", (int) tcp->u_arg[0]);
 265         } else {
 266                 if (indirect_ipccall(tcp)) {
 267                         struct ipc_wrapper {
 268                                 struct msgbuf *msgp;
 269                                 long msgtyp;
 270                         } tmp;
 271
 272                         if (umove(tcp, tcp->u_arg[3], &tmp) < 0) {
 273                                 tprintf("%#lx, %lu, ",
 274                                         tcp->u_arg[3], tcp->u_arg[1]);
 275                         } else {
 276                                 tprint_msgrcv(tcp, (long) tmp.msgp,
 277                                         tcp->u_arg[1], tmp.msgtyp);
 278                         }
 279                         printflags(msg_flags, tcp->u_arg[2], "MSG_???");
 280                 } else {
 281                         tprint_msgrcv(tcp, tcp->u_arg[1],
 282                                 tcp->u_arg[2], tcp->u_arg[3]);
 283                         printflags(msg_flags, tcp->u_arg[4], "MSG_???");
 284                 }
 285         }
 286         return 0;
 287 }
 288
 289 static void
 290 tprint_sembuf(struct tcb *tcp, long addr, unsigned long count)
 291 {
 292         unsigned long i, max_count;
 293
 294         if (abbrev(tcp))
 295                 max_count = (max_strlen < count) ? max_strlen : count;
 296         else
 297                 max_count = count;
 298
 299         if (!max_count) {
 300                 tprintf("%#lx, %lu", addr, count);
 301                 return;
 302         }
 303
 304         for(i = 0; i < max_count; ++i) {
 305                 struct sembuf sb;
 306                 if (i)
 307                         tprintf(", ");
 308                 if (umove(tcp, addr + i * sizeof(struct sembuf), &sb) < 0) {
 309                         if (i) {
 310                                 tprintf("{???}");
 311                                 break;
 312                         } else {
 313                                 tprintf("%#lx, %lu", addr, count);
 314                                 return;
 315                         }
 316                 } else {
 317                         if (!i)
 318                                 tprintf("{");
 319                         tprintf("{%u, %d, ", sb.sem_num, sb.sem_op);
 320                         printflags(semop_flags, sb.sem_flg, "SEM_???");
 321                         tprintf("}");
 322                 }
 323         }
 324
 325         if (i < max_count || max_count < count)
 326                 tprintf(", ...");
 327
 328         tprintf("}, %lu", count);
 329 }
 330
 331 int sys_semop(struct tcb *tcp)
 332 {
 333         if (entering(tcp)) {
 334                 tprintf("%lu, ", tcp->u_arg[0]);
 335                 if (indirect_ipccall(tcp)) {
 336                         tprint_sembuf(tcp, tcp->u_arg[3], tcp->u_arg[1]);
 337                 } else {
 338                         tprint_sembuf(tcp, tcp->u_arg[1], tcp->u_arg[2]);
 339                 }
 340         }
 341         return 0;
 342 }
 343
 344 #ifdef LINUX
 345 int sys_semtimedop(struct tcb *tcp)
 346 {
 347         if (entering(tcp)) {
 348                 tprintf("%lu, ", tcp->u_arg[0]);
 349                 if (indirect_ipccall(tcp)) {
 350                         tprint_sembuf(tcp, tcp->u_arg[3], tcp->u_arg[1]);
 351                         tprintf(", ");
 352                         printtv(tcp, tcp->u_arg[5]);
 353                 } else {
 354                         tprint_sembuf(tcp, tcp->u_arg[1], tcp->u_arg[2]);
 355                         tprintf(", ");
 356                         printtv(tcp, tcp->u_arg[3]);
 357                 }
 358         }
 359         return 0;
 360 }
 361 #endif
 362
 363 int sys_semget(tcp)
 364 struct tcb *tcp;
 365 {
 366         if (entering(tcp)) {
 367                 if (tcp->u_arg[0])
 368                         tprintf("%#lx", tcp->u_arg[0]);
 369                 else
 370                         tprintf("IPC_PRIVATE");
 371                 tprintf(", %lu", tcp->u_arg[1]);
 372                 tprintf(", ");
 373                 if (printflags(resource_flags, tcp->u_arg[2] & ~0777, NULL) != 0)
 374                         tprintf("|");
 375                 tprintf("%#lo", tcp->u_arg[2] & 0777);
 376         }
 377         return 0;
 378 }
 379
 380 int sys_semctl(tcp)
 381 struct tcb *tcp;
 382 {
 383         if (entering(tcp)) {
 384                 tprintf("%lu", tcp->u_arg[0]);
 385                 tprintf(", %lu, ", tcp->u_arg[1]);
 386                 PRINTCTL(semctl_flags, tcp->u_arg[2], "SEM_???");
 387                 tprintf(", %#lx", tcp->u_arg[3]);
 388         }
 389         return 0;
 390 }
 391
 392 int sys_shmget(tcp)
 393 struct tcb *tcp;
 394 {
 395         if (entering(tcp)) {
 396                 if (tcp->u_arg[0])
 397                         tprintf("%#lx", tcp->u_arg[0]);
 398                 else
 399                         tprintf("IPC_PRIVATE");
 400                 tprintf(", %lu", tcp->u_arg[1]);
 401                 tprintf(", ");
 402                 if (printflags(shm_resource_flags, tcp->u_arg[2] & ~0777, NULL) != 0)
 403                         tprintf("|");
 404                 tprintf("%#lo", tcp->u_arg[2] & 0777);
 405         }
 406         return 0;
 407 }
 408
 409 int sys_shmctl(tcp)
 410 struct tcb *tcp;
 411 {
 412         if (entering(tcp)) {
 413                 tprintf("%lu, ", tcp->u_arg[0]);
 414                 PRINTCTL(shmctl_flags, tcp->u_arg[1], "SHM_???");
 415                 if (indirect_ipccall(tcp)) {
 416                         tprintf(", %#lx", tcp->u_arg[3]);
 417                 } else {
 418                         tprintf(", %#lx", tcp->u_arg[2]);
 419                 }
 420         }
 421         return 0;
 422 }
 423
 424 int sys_shmat(tcp)
 425 struct tcb *tcp;
 426 {
 427 #ifdef LINUX
 428         unsigned long raddr;
 429 #endif /* LINUX */
 430
 431         if (exiting(tcp)) {
 432                 tprintf("%lu", tcp->u_arg[0]);
 433                 if (indirect_ipccall(tcp)) {
 434                         tprintf(", %#lx", tcp->u_arg[3]);
 435                         tprintf(", ");
 436                         printflags(shm_flags, tcp->u_arg[1], "SHM_???");
 437                 } else {
 438                         tprintf(", %#lx", tcp->u_arg[1]);
 439                         tprintf(", ");
 440                         printflags(shm_flags, tcp->u_arg[2], "SHM_???");
 441                 }
 442                 if (syserror(tcp))
 443                         return 0;
 444 /* HPPA does not use an IPC multiplexer on Linux.  */
 445 #if defined(LINUX) && !defined(HPPA)
 446                 if (umove(tcp, tcp->u_arg[2], &raddr) < 0)
 447                         return RVAL_NONE;
 448                 tcp->u_rval = raddr;
 449 #endif /* LINUX */
 450                 return RVAL_HEX;
 451         }
 452         return 0;
 453 }
 454
 455 int sys_shmdt(tcp)
 456 struct tcb *tcp;
 457 {
 458         if (entering(tcp)) {
 459                 if (indirect_ipccall(tcp)) {
 460                         tprintf("%#lx", tcp->u_arg[3]);
 461                 } else {
 462                         tprintf("%#lx", tcp->u_arg[0]);
 463                 }
 464         }
 465         return 0;
 466 }
 467
 468 #endif /* defined(LINUX) || defined(SUNOS4) || defined(FREEBSD) */
 469
 470 #ifdef LINUX
 471 int
 472 sys_mq_open(struct tcb *tcp)
 473 {
 474         if (entering(tcp)) {
 475                 printpath(tcp, tcp->u_arg[0]);
 476                 tprintf(", ");
 477                 /* flags */
 478                 tprint_open_modes(tcp->u_arg[1]);
 479                 if (tcp->u_arg[1] & O_CREAT) {
 480 # ifndef HAVE_MQUEUE_H
 481                         tprintf(", %lx", tcp->u_arg[2]);
 482 # else
 483                         struct mq_attr attr;
 484                         /* mode */
 485                         tprintf(", %#lo, ", tcp->u_arg[2]);
 486                         if (umove(tcp, tcp->u_arg[3], &attr) < 0)
 487                                 tprintf("{ ??? }");
 488                         else
 489                                 tprintf("{mq_maxmsg=%ld, mq_msgsize=%ld}",
 490                                         attr.mq_maxmsg, attr.mq_msgsize);
 491 # endif
 492                 }
 493         }
 494         return 0;
 495 }
 496
 497 int
 498 sys_mq_timedsend(struct tcb *tcp)
 499 {
 500         if (entering(tcp)) {
 501                 tprintf("%ld, ", tcp->u_arg[0]);
 502                 printstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
 503                 tprintf(", %lu, %ld, ", tcp->u_arg[2], tcp->u_arg[3]);
 504                 printtv(tcp, tcp->u_arg[4]);
 505         }
 506         return 0;
 507 }
 508
 509 int
 510 sys_mq_timedreceive(struct tcb *tcp)
 511 {
 512         if (entering(tcp))
 513                 tprintf("%ld, ", tcp->u_arg[0]);
 514         else {
 515                 printstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
 516                 tprintf(", %lu, %ld, ", tcp->u_arg[2], tcp->u_arg[3]);
 517                 printtv(tcp, tcp->u_arg[4]);
 518         }
 519         return 0;
 520 }
 521
 522 int
 523 sys_mq_notify(struct tcb *tcp)
 524 {
 525         if (entering(tcp)) {
 526                 tprintf("%ld, ", tcp->u_arg[0]);
 527                 printsigevent(tcp, tcp->u_arg[1]);
 528         }
 529         return 0;
 530 }
 531
 532 static void
 533 printmqattr(struct tcb *tcp, long addr)
 534 {
 535         if (addr == 0)
 536                 tprintf("NULL");
 537         else {
 538 # ifndef HAVE_MQUEUE_H
 539                 tprintf("%#lx", addr);
 540 # else
 541                 struct mq_attr attr;
 542                 if (umove(tcp, addr, &attr) < 0) {
 543                         tprintf("{...}");
 544                         return;
 545                 }
 546                 tprintf("{mq_flags=");
 547                 tprint_open_modes(attr.mq_flags);
 548                 tprintf(", mq_maxmsg=%ld, mq_msgsize=%ld, mq_curmsg=%ld}",
 549                         attr.mq_maxmsg, attr.mq_msgsize, attr.mq_curmsgs);
 550 # endif
 551         }
 552 }
 553
 554 int
 555 sys_mq_getsetattr(struct tcb *tcp)
 556 {
 557         if (entering(tcp)) {
 558                 tprintf("%ld, ", tcp->u_arg[0]);
 559                 printmqattr(tcp, tcp->u_arg[1]);
 560                 tprintf(", ");
 561         } else
 562                 printmqattr(tcp, tcp->u_arg[2]);
 563         return 0;
 564 }
 565 #endif