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 #if defined IA64
 189         return tcp->scno < 1024; /* ia32 emulation syscalls are low */
 190 #endif
 191         return 0;
 192 }
 193
 194 int sys_msgctl(tcp)
 195 struct tcb *tcp;
 196 {
 197         if (entering(tcp)) {
 198                 tprintf("%lu, ", tcp->u_arg[0]);
 199                 PRINTCTL(msgctl_flags, tcp->u_arg[1], "MSG_???");
 200                 tprintf(", %#lx", tcp->u_arg[indirect_ipccall(tcp) ? 3 : 2]);
 201         }
 202         return 0;
 203 }
 204
 205 int sys_msgsnd(tcp)
 206 struct tcb *tcp;
 207 {
 208         long mtype;
 209
 210         if (entering(tcp)) {
 211                 tprintf("%lu", tcp->u_arg[0]);
 212                 if (indirect_ipccall(tcp)) {
 213                         umove(tcp, tcp->u_arg[3], &mtype);
 214                         tprintf(", {%lu, ", mtype);
 215                         printstr(tcp, tcp->u_arg[3] + sizeof(long),
 216                                  tcp->u_arg[1]);
 217                         tprintf("}, %lu", tcp->u_arg[1]);
 218                         tprintf(", ");
 219                         printflags(msg_flags, tcp->u_arg[2], "MSG_???");
 220                 } else {
 221                         umove(tcp, tcp->u_arg[1], &mtype);
 222                         tprintf(", {%lu, ", mtype);
 223                         printstr(tcp, tcp->u_arg[1] + sizeof(long),
 224                                  tcp->u_arg[2]);
 225                         tprintf("}, %lu", tcp->u_arg[2]);
 226                         tprintf(", ");
 227                         printflags(msg_flags, tcp->u_arg[3], "MSG_???");
 228                 }
 229         }
 230         return 0;
 231 }
 232
 233 int sys_msgrcv(tcp)
 234 struct tcb *tcp;
 235 {
 236         long mtype;
 237
 238         if (entering(tcp)) {
 239                 tprintf("%lu, ", tcp->u_arg[0]);
 240         } else {
 241                 tprintf("%lu", tcp->u_arg[0]);
 242                 if (indirect_ipccall(tcp)) {
 243                         struct ipc_wrapper {
 244                                 struct msgbuf *msgp;
 245                                 long msgtyp;
 246                         } tmp;
 247                         umove(tcp, tcp->u_arg[3], &tmp);
 248                         umove(tcp, (long) tmp.msgp, &mtype);
 249                         tprintf(", {%lu, ", mtype);
 250                         printstr(tcp, (long) (tmp.msgp) + sizeof(long),
 251                                  tcp->u_arg[1]);
 252                         tprintf("}, %lu", tcp->u_arg[1]);
 253                         tprintf(", %ld", tmp.msgtyp);
 254                         tprintf(", ");
 255                         printflags(msg_flags, tcp->u_arg[2], "MSG_???");
 256                 } else {
 257                         umove(tcp, tcp->u_arg[1], &mtype);
 258                         tprintf("{%lu, ", mtype);
 259                         printstr(tcp, tcp->u_arg[1] + sizeof(long),
 260                                  tcp->u_arg[2]);
 261                         tprintf("}, %lu", tcp->u_arg[2]);
 262                         tprintf(", %ld", tcp->u_arg[3]);
 263                         tprintf(", ");
 264                         printflags(msg_flags, tcp->u_arg[4], "MSG_???");
 265                 }
 266         }
 267         return 0;
 268 }
 269
 270 int sys_semop(tcp)
 271 struct tcb *tcp;
 272 {
 273         if (entering(tcp)) {
 274                 tprintf("%lu", tcp->u_arg[0]);
 275                 if (indirect_ipccall(tcp)) {
 276                         tprintf(", %#lx", tcp->u_arg[3]);
 277                         tprintf(", %lu", tcp->u_arg[1]);
 278                 } else {
 279                         tprintf(", %#lx", tcp->u_arg[1]);
 280                         tprintf(", %lu", tcp->u_arg[2]);
 281                 }
 282         }
 283         return 0;
 284 }
 285
 286 #ifdef LINUX
 287 int sys_semtimedop(tcp)
 288 struct tcb *tcp;
 289 {
 290         if (entering(tcp)) {
 291                 tprintf("%lu", tcp->u_arg[0]);
 292                 if (!indirect_ipccall(tcp)) {
 293                         tprintf(", %#lx", tcp->u_arg[3]);
 294                         tprintf(", %lu, ", tcp->u_arg[1]);
 295                         printtv(tcp, tcp->u_arg[5]);
 296                 } else {
 297                         tprintf(", %#lx", tcp->u_arg[1]);
 298                         tprintf(", %lu, ", tcp->u_arg[2]);
 299                         printtv(tcp, tcp->u_arg[3]);
 300                 }
 301         }
 302         return 0;
 303 }
 304 #endif
 305
 306 int sys_semget(tcp)
 307 struct tcb *tcp;
 308 {
 309         if (entering(tcp)) {
 310                 if (tcp->u_arg[0])
 311                         tprintf("%lu", tcp->u_arg[0]);
 312                 else
 313                         tprintf("IPC_PRIVATE");
 314                 tprintf(", %lu", tcp->u_arg[1]);
 315                 tprintf(", ");
 316                 if (printflags(resource_flags, tcp->u_arg[2] & ~0777, NULL) != 0)
 317                         tprintf("|");
 318                 tprintf("%#lo", tcp->u_arg[2] & 0777);
 319         }
 320         return 0;
 321 }
 322
 323 int sys_semctl(tcp)
 324 struct tcb *tcp;
 325 {
 326         if (entering(tcp)) {
 327                 tprintf("%lu", tcp->u_arg[0]);
 328                 tprintf(", %lu, ", tcp->u_arg[1]);
 329                 PRINTCTL(semctl_flags, tcp->u_arg[2], "SEM_???");
 330                 tprintf(", %#lx", tcp->u_arg[3]);
 331         }
 332         return 0;
 333 }
 334
 335 int sys_shmget(tcp)
 336 struct tcb *tcp;
 337 {
 338         if (entering(tcp)) {
 339                 if (tcp->u_arg[0])
 340                         tprintf("%lu", tcp->u_arg[0]);
 341                 else
 342                         tprintf("IPC_PRIVATE");
 343                 tprintf(", %lu", tcp->u_arg[1]);
 344                 tprintf(", ");
 345                 if (printflags(shm_resource_flags, tcp->u_arg[2] & ~0777, NULL) != 0)
 346                         tprintf("|");
 347                 tprintf("%#lo", tcp->u_arg[2] & 0777);
 348         }
 349         return 0;
 350 }
 351
 352 int sys_shmctl(tcp)
 353 struct tcb *tcp;
 354 {
 355         if (entering(tcp)) {
 356                 tprintf("%lu, ", tcp->u_arg[0]);
 357                 PRINTCTL(shmctl_flags, tcp->u_arg[1], "SHM_???");
 358                 if (indirect_ipccall(tcp)) {
 359                         tprintf(", %#lx", tcp->u_arg[3]);
 360                 } else {
 361                         tprintf(", %#lx", tcp->u_arg[2]);
 362                 }
 363         }
 364         return 0;
 365 }
 366
 367 int sys_shmat(tcp)
 368 struct tcb *tcp;
 369 {
 370 #ifdef LINUX
 371         unsigned long raddr;
 372 #endif /* LINUX */
 373
 374         if (exiting(tcp)) {
 375                 tprintf("%lu", tcp->u_arg[0]);
 376                 if (indirect_ipccall(tcp)) {
 377                         tprintf(", %#lx", tcp->u_arg[3]);
 378                         tprintf(", ");
 379                         printflags(shm_flags, tcp->u_arg[1], "SHM_???");
 380                 } else {
 381                         tprintf(", %#lx", tcp->u_arg[1]);
 382                         tprintf(", ");
 383                         printflags(shm_flags, tcp->u_arg[2], "SHM_???");
 384                 }
 385                 if (syserror(tcp))
 386                         return 0;
 387 #ifdef LINUX
 388                 if (umove(tcp, tcp->u_arg[2], &raddr) < 0)
 389                         return RVAL_NONE;
 390                 tcp->u_rval = raddr;
 391 #endif /* LINUX */
 392                 return RVAL_HEX;
 393         }
 394         return 0;
 395 }
 396
 397 int sys_shmdt(tcp)
 398 struct tcb *tcp;
 399 {
 400         if (entering(tcp)) {
 401                 if (indirect_ipccall(tcp)) {
 402                         tprintf("%#lx", tcp->u_arg[3]);
 403                 } else {
 404                         tprintf("%#lx", tcp->u_arg[0]);
 405                 }
 406         }
 407         return 0;
 408 }
 409
 410 #endif /* defined(LINUX) || defined(SUNOS4) || defined(FREEBSD) */
 411
 412 #ifdef LINUX
 413 int sys_mq_open(tcp)
 414 struct tcb *tcp;
 415 {
 416         if (entering(tcp)) {
 417                 printpath(tcp, tcp->u_arg[0]);
 418                 tprintf(", ");
 419                 /* flags */
 420                 printflags(openmodes, tcp->u_arg[1] + 1, "O_???");
 421                 if (tcp->u_arg[1] & O_CREAT) {
 422 # ifndef HAVE_MQUEUE_H
 423                         tprintf(", %lx", tcp->u_arg[2]);
 424 # else
 425                         struct mq_attr attr;
 426                         /* mode */
 427                         tprintf(", %#lo, ", tcp->u_arg[2]);
 428                         if (umove(tcp, tcp->u_arg[3], &attr) < 0)
 429                                 tprintf("{ ??? }");
 430                         else
 431                                 tprintf("{mq_maxmsg=%ld, mq_msgsize=%ld}",
 432                                         attr.mq_maxmsg, attr.mq_msgsize);
 433 # endif
 434                 }
 435         }
 436         return 0;
 437 }
 438
 439 int sys_mq_timedsend(tcp)
 440 struct tcb *tcp;
 441 {
 442         if (entering(tcp)) {
 443                 tprintf("%ld, ", tcp->u_arg[0]);
 444                 printstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
 445                 tprintf(", %lu, %ld, ", tcp->u_arg[2], tcp->u_arg[3]);
 446                 printtv(tcp, tcp->u_arg[4]);
 447         }
 448         return 0;
 449 }
 450
 451 int sys_mq_timedreceive(tcp)
 452 struct tcb *tcp;
 453 {
 454         if (entering(tcp))
 455                 tprintf("%ld, ", tcp->u_arg[0]);
 456         else {
 457                 printstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
 458                 tprintf(", %lu, %ld, ", tcp->u_arg[2], tcp->u_arg[3]);
 459                 printtv(tcp, tcp->u_arg[4]);
 460         }
 461         return 0;
 462 }
 463
 464 int sys_mq_notify(tcp)
 465 struct tcb *tcp;
 466 {
 467         if (entering(tcp)) {
 468                 tprintf("%ld, ", tcp->u_arg[0]);
 469                 printsigevent(tcp, tcp->u_arg[1]);
 470         }
 471         return 0;
 472 }
 473
 474 static void printmqattr(tcp, addr)
 475 struct tcb *tcp;
 476 long addr;
 477 {
 478         if (addr == 0)
 479                 tprintf("NULL");
 480         else {
 481 # ifndef HAVE_MQUEUE_H
 482                 tprintf("%#lx", addr);
 483 # else
 484                 struct mq_attr attr;
 485                 if (umove(tcp, addr, &attr) < 0) {
 486                         tprintf("{...}");
 487                         return;
 488                 }
 489                 tprintf("{mq_flags=");
 490                 printflags(openmodes, attr.mq_flags + 1, "O_???");
 491                 tprintf(", mq_maxmsg=%ld, mq_msgsize=%ld, mq_curmsg=%ld}",
 492                         attr.mq_maxmsg, attr.mq_msgsize, attr.mq_curmsgs);
 493 # endif
 494         }
 495 }
 496
 497 int sys_mq_getsetattr(tcp)
 498 struct tcb *tcp;
 499 {
 500         if (entering(tcp)) {
 501                 tprintf("%ld, ", tcp->u_arg[0]);
 502                 printmqattr(tcp, tcp->u_arg[1]);
 503                 tprintf(", ");
 504         } else
 505                 printmqattr(tcp, tcp->u_arg[2]);
 506         return 0;
 507 }
 508 #endif