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 const struct xlat openmodes[];
  71 extern void printsigevent(struct tcb *tcp, long arg);
  72
  73 static const struct xlat msgctl_flags[] = {
  74         { IPC_RMID,     "IPC_RMID"      },
  75         { IPC_SET,      "IPC_SET"       },
  76         { IPC_STAT,     "IPC_STAT"      },
  77 #ifdef LINUX
  78         { IPC_INFO,     "IPC_INFO"      },
  79         { MSG_STAT,     "MSG_STAT"      },
  80         { MSG_INFO,     "MSG_INFO"      },
  81 #endif /* LINUX */
  82         { 0,            NULL            },
  83 };
  84
  85 static const struct xlat semctl_flags[] = {
  86         { IPC_RMID,     "IPC_RMID"      },
  87         { IPC_SET,      "IPC_SET"       },
  88         { IPC_STAT,     "IPC_STAT"      },
  89 #ifdef LINUX
  90         { IPC_INFO,     "IPC_INFO"      },
  91         { SEM_STAT,     "SEM_STAT"      },
  92         { SEM_INFO,     "SEM_INFO"      },
  93 #endif /* LINUX */
  94         { GETPID,       "GETPID"        },
  95         { GETVAL,       "GETVAL"        },
  96         { GETALL,       "GETALL"        },
  97         { GETNCNT,      "GETNCNT"       },
  98         { GETZCNT,      "GETZCNT"       },
  99         { SETVAL,       "SETVAL"        },
 100         { SETALL,       "SETALL"        },
 101         { 0,            NULL            },
 102 };
 103
 104 static const struct xlat shmctl_flags[] = {
 105         { IPC_RMID,     "IPC_RMID"      },
 106         { IPC_SET,      "IPC_SET"       },
 107         { IPC_STAT,     "IPC_STAT"      },
 108 #ifdef LINUX
 109         { IPC_INFO,     "IPC_INFO"      },
 110         { SHM_STAT,     "SHM_STAT"      },
 111         { SHM_INFO,     "SHM_INFO"      },
 112 #endif /* LINUX */
 113 #ifdef SHM_LOCK
 114         { SHM_LOCK,     "SHM_LOCK"      },
 115 #endif
 116 #ifdef SHM_UNLOCK
 117         { SHM_UNLOCK,   "SHM_UNLOCK"    },
 118 #endif
 119         { 0,            NULL            },
 120 };
 121
 122 static const struct xlat resource_flags[] = {
 123         { IPC_CREAT,    "IPC_CREAT"     },
 124         { IPC_EXCL,     "IPC_EXCL"      },
 125         { IPC_NOWAIT,   "IPC_NOWAIT"    },
 126         { 0,            NULL            },
 127 };
 128
 129 static const struct xlat shm_resource_flags[] = {
 130         { IPC_CREAT,    "IPC_CREAT"     },
 131         { IPC_EXCL,     "IPC_EXCL"      },
 132 #ifdef SHM_HUGETLB
 133         { SHM_HUGETLB,  "SHM_HUGETLB"   },
 134 #endif
 135         { 0,            NULL            },
 136 };
 137
 138 static const struct xlat shm_flags[] = {
 139 #ifdef LINUX
 140         { SHM_REMAP,    "SHM_REMAP"     },
 141 #endif /* LINUX */
 142         { SHM_RDONLY,   "SHM_RDONLY"    },
 143         { SHM_RND,      "SHM_RND"       },
 144         { 0,            NULL            },
 145 };
 146
 147 static const struct xlat msg_flags[] = {
 148         { MSG_NOERROR,  "MSG_NOERROR"   },
 149 #ifdef LINUX
 150         { MSG_EXCEPT,   "MSG_EXCEPT"    },
 151 #endif /* LINUX */
 152         { IPC_NOWAIT,   "IPC_NOWAIT"    },
 153         { 0,            NULL            },
 154 };
 155
 156 int sys_msgget(tcp)
 157 struct tcb *tcp;
 158 {
 159         if (entering(tcp)) {
 160                 if (tcp->u_arg[0])
 161                         tprintf("%lu", tcp->u_arg[0]);
 162                 else
 163                         tprintf("IPC_PRIVATE");
 164                 tprintf(", ");
 165                 if (printflags(resource_flags, tcp->u_arg[1] & ~0777, NULL) != 0)
 166                         tprintf("|");
 167                 tprintf("%#lo", tcp->u_arg[1] & 0777);
 168         }
 169         return 0;
 170 }
 171
 172 #ifdef IPC_64
 173 # define PRINTCTL(flagset, arg, dflt) \
 174         if ((arg) & IPC_64) tprintf("IPC_64|"); \
 175         printxval((flagset), (arg) &~ IPC_64, dflt)
 176 #else
 177 # define PRINTCTL printxval
 178 #endif
 179
 180 static int
 181 indirect_ipccall(tcp)
 182 struct tcb *tcp;
 183 {
 184 #ifdef LINUX
 185 #ifdef X86_64
 186         return current_personality > 0;
 187 #endif
 188         return 1;
 189 #endif
 190         return 0;
 191 }
 192
 193 int sys_msgctl(tcp)
 194 struct tcb *tcp;
 195 {
 196         if (entering(tcp)) {
 197                 tprintf("%lu, ", tcp->u_arg[0]);
 198                 PRINTCTL(msgctl_flags, tcp->u_arg[1], "MSG_???");
 199                 tprintf(", %#lx", tcp->u_arg[indirect_ipccall(tcp) ? 3 : 2]);
 200         }
 201         return 0;
 202 }
 203
 204 int sys_msgsnd(tcp)
 205 struct tcb *tcp;
 206 {
 207         long mtype;
 208
 209         if (entering(tcp)) {
 210                 tprintf("%lu", tcp->u_arg[0]);
 211                 if (indirect_ipccall(tcp)) {
 212                         umove(tcp, tcp->u_arg[3], &mtype);
 213                         tprintf(", {%lu, ", mtype);
 214                         printstr(tcp, tcp->u_arg[3] + sizeof(long),
 215                                  tcp->u_arg[1]);
 216                         tprintf("}, %lu", tcp->u_arg[1]);
 217                         tprintf(", ");
 218                         printflags(msg_flags, tcp->u_arg[2], "MSG_???");
 219                 } else {
 220                         umove(tcp, tcp->u_arg[1], &mtype);
 221                         tprintf(", {%lu, ", mtype);
 222                         printstr(tcp, tcp->u_arg[1] + sizeof(long),
 223                                  tcp->u_arg[2]);
 224                         tprintf("}, %lu", tcp->u_arg[2]);
 225                         tprintf(", ");
 226                         printflags(msg_flags, tcp->u_arg[3], "MSG_???");
 227                 }
 228         }
 229         return 0;
 230 }
 231
 232 int sys_msgrcv(tcp)
 233 struct tcb *tcp;
 234 {
 235         long mtype;
 236
 237         if (entering(tcp)) {
 238                 tprintf("%lu, ", tcp->u_arg[0]);
 239         } else {
 240                 tprintf("%lu", tcp->u_arg[0]);
 241                 if (indirect_ipccall(tcp)) {
 242                         struct ipc_wrapper {
 243                                 struct msgbuf *msgp;
 244                                 long msgtyp;
 245                         } tmp;
 246                         umove(tcp, tcp->u_arg[3], &tmp);
 247                         umove(tcp, (long) tmp.msgp, &mtype);
 248                         tprintf(", {%lu, ", mtype);
 249                         printstr(tcp, (long) (tmp.msgp) + sizeof(long),
 250                                  tcp->u_arg[1]);
 251                         tprintf("}, %lu", tcp->u_arg[1]);
 252                         tprintf(", %ld", tmp.msgtyp);
 253                         tprintf(", ");
 254                         printflags(msg_flags, tcp->u_arg[2], "MSG_???");
 255                 } else {
 256                         umove(tcp, tcp->u_arg[1], &mtype);
 257                         tprintf("{%lu, ", mtype);
 258                         printstr(tcp, tcp->u_arg[1] + sizeof(long),
 259                                  tcp->u_arg[2]);
 260                         tprintf("}, %lu", tcp->u_arg[2]);
 261                         tprintf(", %ld", tcp->u_arg[3]);
 262                         tprintf(", ");
 263                         printflags(msg_flags, tcp->u_arg[4], "MSG_???");
 264                 }
 265         }
 266         return 0;
 267 }
 268
 269 int sys_semop(tcp)
 270 struct tcb *tcp;
 271 {
 272         if (entering(tcp)) {
 273                 tprintf("%lu", tcp->u_arg[0]);
 274                 if (indirect_ipccall(tcp)) {
 275                         tprintf(", %#lx", tcp->u_arg[3]);
 276                         tprintf(", %lu", tcp->u_arg[1]);
 277                 } else {
 278                         tprintf(", %#lx", tcp->u_arg[1]);
 279                         tprintf(", %lu", tcp->u_arg[2]);
 280                 }
 281         }
 282         return 0;
 283 }
 284
 285 #ifdef LINUX
 286 int sys_semtimedop(tcp)
 287 struct tcb *tcp;
 288 {
 289         if (entering(tcp)) {
 290                 tprintf("%lu", tcp->u_arg[0]);
 291                 if (!indirect_ipccall(tcp)) {
 292                         tprintf(", %#lx", tcp->u_arg[3]);
 293                         tprintf(", %lu, ", tcp->u_arg[1]);
 294                         printtv(tcp, tcp->u_arg[5]);
 295                 } else {
 296                         tprintf(", %#lx", tcp->u_arg[1]);
 297                         tprintf(", %lu, ", tcp->u_arg[2]);
 298                         printtv(tcp, tcp->u_arg[3]);
 299                 }
 300         }
 301         return 0;
 302 }
 303 #endif
 304
 305 int sys_semget(tcp)
 306 struct tcb *tcp;
 307 {
 308         if (entering(tcp)) {
 309                 if (tcp->u_arg[0])
 310                         tprintf("%lu", tcp->u_arg[0]);
 311                 else
 312                         tprintf("IPC_PRIVATE");
 313                 tprintf(", %lu", tcp->u_arg[1]);
 314                 tprintf(", ");
 315                 if (printflags(resource_flags, tcp->u_arg[2] & ~0777, NULL) != 0)
 316                         tprintf("|");
 317                 tprintf("%#lo", tcp->u_arg[2] & 0777);
 318         }
 319         return 0;
 320 }
 321
 322 int sys_semctl(tcp)
 323 struct tcb *tcp;
 324 {
 325         if (entering(tcp)) {
 326                 tprintf("%lu", tcp->u_arg[0]);
 327                 tprintf(", %lu, ", tcp->u_arg[1]);
 328                 PRINTCTL(semctl_flags, tcp->u_arg[2], "SEM_???");
 329                 tprintf(", %#lx", tcp->u_arg[3]);
 330         }
 331         return 0;
 332 }
 333
 334 int sys_shmget(tcp)
 335 struct tcb *tcp;
 336 {
 337         if (entering(tcp)) {
 338                 if (tcp->u_arg[0])
 339                         tprintf("%lu", tcp->u_arg[0]);
 340                 else
 341                         tprintf("IPC_PRIVATE");
 342                 tprintf(", %lu", tcp->u_arg[1]);
 343                 tprintf(", ");
 344                 if (printflags(shm_resource_flags, tcp->u_arg[2] & ~0777, NULL) != 0)
 345                         tprintf("|");
 346                 tprintf("%#lo", tcp->u_arg[2] & 0777);
 347         }
 348         return 0;
 349 }
 350
 351 int sys_shmctl(tcp)
 352 struct tcb *tcp;
 353 {
 354         if (entering(tcp)) {
 355                 tprintf("%lu, ", tcp->u_arg[0]);
 356                 PRINTCTL(shmctl_flags, tcp->u_arg[1], "SHM_???");
 357                 if (indirect_ipccall(tcp)) {
 358                         tprintf(", %#lx", tcp->u_arg[3]);
 359                 } else {
 360                         tprintf(", %#lx", tcp->u_arg[2]);
 361                 }
 362         }
 363         return 0;
 364 }
 365
 366 int sys_shmat(tcp)
 367 struct tcb *tcp;
 368 {
 369 #ifdef LINUX
 370         unsigned long raddr;
 371 #endif /* LINUX */
 372
 373         if (exiting(tcp)) {
 374                 tprintf("%lu", tcp->u_arg[0]);
 375                 if (indirect_ipccall(tcp)) {
 376                         tprintf(", %#lx", tcp->u_arg[3]);
 377                         tprintf(", ");
 378                         printflags(shm_flags, tcp->u_arg[1], "SHM_???");
 379                 } else {
 380                         tprintf(", %#lx", tcp->u_arg[1]);
 381                         tprintf(", ");
 382                         printflags(shm_flags, tcp->u_arg[2], "SHM_???");
 383                 }
 384                 if (syserror(tcp))
 385                         return 0;
 386 #ifdef LINUX
 387                 if (umove(tcp, tcp->u_arg[2], &raddr) < 0)
 388                         return RVAL_NONE;
 389                 tcp->u_rval = raddr;
 390 #endif /* LINUX */
 391                 return RVAL_HEX;
 392         }
 393         return 0;
 394 }
 395
 396 int sys_shmdt(tcp)
 397 struct tcb *tcp;
 398 {
 399         if (entering(tcp)) {
 400                 if (indirect_ipccall(tcp)) {
 401                         tprintf("%#lx", tcp->u_arg[3]);
 402                 } else {
 403                         tprintf("%#lx", tcp->u_arg[0]);
 404                 }
 405         }
 406         return 0;
 407 }
 408
 409 #endif /* defined(LINUX) || defined(SUNOS4) || defined(FREEBSD) */
 410
 411 #ifdef LINUX
 412 int sys_mq_open(tcp)
 413 struct tcb *tcp;
 414 {
 415         if (entering(tcp)) {
 416                 printpath(tcp, tcp->u_arg[0]);
 417                 tprintf(", ");
 418                 /* flags */
 419                 printflags(openmodes, tcp->u_arg[1] + 1, "O_???");
 420                 if (tcp->u_arg[1] & O_CREAT) {
 421 # ifndef HAVE_MQUEUE_H
 422                         tprintf(", %lx", tcp->u_arg[2]);
 423 # else
 424                         struct mq_attr attr;
 425                         /* mode */
 426                         tprintf(", %#lo, ", tcp->u_arg[2]);
 427                         if (umove(tcp, tcp->u_arg[3], &attr) < 0)
 428                                 tprintf("{ ??? }");
 429                         else
 430                                 tprintf("{mq_maxmsg=%ld, mq_msgsize=%ld}",
 431                                         attr.mq_maxmsg, attr.mq_msgsize);
 432 # endif
 433                 }
 434         }
 435         return 0;
 436 }
 437
 438 int sys_mq_timedsend(tcp)
 439 struct tcb *tcp;
 440 {
 441         if (entering(tcp)) {
 442                 tprintf("%ld, ", tcp->u_arg[0]);
 443                 printstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
 444                 tprintf(", %lu, %ld, ", tcp->u_arg[2], tcp->u_arg[3]);
 445                 printtv(tcp, tcp->u_arg[4]);
 446         }
 447         return 0;
 448 }
 449
 450 int sys_mq_timedreceive(tcp)
 451 struct tcb *tcp;
 452 {
 453         if (entering(tcp))
 454                 tprintf("%ld, ", tcp->u_arg[0]);
 455         else {
 456                 printstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
 457                 tprintf(", %lu, %ld, ", tcp->u_arg[2], tcp->u_arg[3]);
 458                 printtv(tcp, tcp->u_arg[4]);
 459         }
 460         return 0;
 461 }
 462
 463 int sys_mq_notify(tcp)
 464 struct tcb *tcp;
 465 {
 466         if (entering(tcp)) {
 467                 tprintf("%ld, ", tcp->u_arg[0]);
 468                 printsigevent(tcp, tcp->u_arg[1]);
 469         }
 470         return 0;
 471 }
 472
 473 static void printmqattr(tcp, addr)
 474 struct tcb *tcp;
 475 long addr;
 476 {
 477         if (addr == 0)
 478                 tprintf("NULL");
 479         else {
 480 # ifndef HAVE_MQUEUE_H
 481                 tprintf("%#lx", addr);
 482 # else
 483                 struct mq_attr attr;
 484                 if (umove(tcp, addr, &attr) < 0) {
 485                         tprintf("{...}");
 486                         return;
 487                 }
 488                 tprintf("{mq_flags=");
 489                 printflags(openmodes, attr.mq_flags + 1, "O_???");
 490                 tprintf(", mq_maxmsg=%ld, mq_msgsize=%ld, mq_curmsg=%ld}",
 491                         attr.mq_maxmsg, attr.mq_msgsize, attr.mq_curmsgs);
 492 # endif
 493         }
 494 }
 495
 496 int sys_mq_getsetattr(tcp)
 497 struct tcb *tcp;
 498 {
 499         if (entering(tcp)) {
 500                 tprintf("%ld, ", tcp->u_arg[0]);
 501                 printmqattr(tcp, tcp->u_arg[1]);
 502                 tprintf(", ");
 503         } else
 504                 printmqattr(tcp, tcp->u_arg[2]);
 505         return 0;
 506 }
 507 #endif