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 int sys_msgctl(tcp)
 181 struct tcb *tcp;
 182 {
 183         if (entering(tcp)) {
 184                 tprintf("%lu, ", tcp->u_arg[0]);
 185                 PRINTCTL(msgctl_flags, tcp->u_arg[1], "MSG_???");
 186 #ifdef LINUX
 187                 tprintf(", %#lx", tcp->u_arg[3]);
 188 #else /* !LINUX */
 189                 tprintf(", %#lx", tcp->u_arg[2]);
 190 #endif /* !LINUX */
 191         }
 192         return 0;
 193 }
 194
 195 int sys_msgsnd(tcp)
 196 struct tcb *tcp;
 197 {
 198         long mtype;
 199
 200         if (entering(tcp)) {
 201                 tprintf("%lu", tcp->u_arg[0]);
 202 #ifdef LINUX
 203                 umove(tcp, tcp->u_arg[3], &mtype);
 204                 tprintf(", {%lu, ", mtype);
 205                 printstr(tcp, tcp->u_arg[3] + sizeof(long),
 206                         tcp->u_arg[1]);
 207                 tprintf("}, %lu", tcp->u_arg[1]);
 208                 tprintf(", ");
 209                 printflags(msg_flags, tcp->u_arg[2], "MSG_???");
 210 #else /* !LINUX */
 211                 umove(tcp, tcp->u_arg[1], &mtype);
 212                 tprintf(", {%lu, ", mtype);
 213                 printstr(tcp, tcp->u_arg[1] + sizeof(long),
 214                         tcp->u_arg[2]);
 215                 tprintf("}, %lu", tcp->u_arg[2]);
 216                 tprintf(", ");
 217                 printflags(msg_flags, tcp->u_arg[3], "MSG_???");
 218 #endif /* !LINUX */
 219         }
 220         return 0;
 221 }
 222
 223 int sys_msgrcv(tcp)
 224 struct tcb *tcp;
 225 {
 226         long mtype;
 227 #ifdef LINUX
 228         struct ipc_wrapper {
 229                 struct msgbuf *msgp;
 230                 long msgtyp;
 231         } tmp;
 232 #endif
 233
 234
 235         if (exiting(tcp)) {
 236                 tprintf("%lu", tcp->u_arg[0]);
 237 #ifdef LINUX
 238                 umove(tcp, tcp->u_arg[3], &tmp);
 239                 umove(tcp, (long) tmp.msgp, &mtype);
 240                 tprintf(", {%lu, ", mtype);
 241                 printstr(tcp, (long) (tmp.msgp) + sizeof(long),
 242                         tcp->u_arg[1]);
 243                 tprintf("}, %lu", tcp->u_arg[1]);
 244                 tprintf(", %ld", tmp.msgtyp);
 245                 tprintf(", ");
 246                 printflags(msg_flags, tcp->u_arg[2], "MSG_???");
 247 #else /* !LINUX */
 248                 umove(tcp, tcp->u_arg[1], &mtype);
 249                 tprintf(", {%lu, ", mtype);
 250                 printstr(tcp, tcp->u_arg[1] + sizeof(long),
 251                         tcp->u_arg[2]);
 252                 tprintf("}, %lu", tcp->u_arg[2]);
 253                 tprintf(", %ld", tcp->u_arg[3]);
 254                 tprintf(", ");
 255                 printflags(msg_flags, tcp->u_arg[4], "MSG_???");
 256 #endif /* !LINUX */
 257         }
 258         return 0;
 259 }
 260
 261 int sys_semop(tcp)
 262 struct tcb *tcp;
 263 {
 264         if (entering(tcp)) {
 265                 tprintf("%lu", tcp->u_arg[0]);
 266 #ifdef LINUX
 267                 tprintf(", %#lx", tcp->u_arg[3]);
 268                 tprintf(", %lu", tcp->u_arg[1]);
 269 #else /* !LINUX */
 270                 tprintf(", %#lx", tcp->u_arg[1]);
 271                 tprintf(", %lu", tcp->u_arg[2]);
 272 #endif /* !LINUX */
 273         }
 274         return 0;
 275 }
 276
 277 #ifdef LINUX
 278 int sys_semtimedop(tcp)
 279 struct tcb *tcp;
 280 {
 281         if (entering(tcp)) {
 282                 tprintf("%lu", tcp->u_arg[0]);
 283                 tprintf(", %#lx", tcp->u_arg[3]);
 284                 tprintf(", %lu, ", tcp->u_arg[1]);
 285                 printtv(tcp, tcp->u_arg[5]);
 286         }
 287         return 0;
 288 }
 289 #endif
 290
 291 int sys_semget(tcp)
 292 struct tcb *tcp;
 293 {
 294         if (entering(tcp)) {
 295                 if (tcp->u_arg[0])
 296                         tprintf("%lu", tcp->u_arg[0]);
 297                 else
 298                         tprintf("IPC_PRIVATE");
 299                 tprintf(", %lu", tcp->u_arg[1]);
 300                 tprintf(", ");
 301                 if (printflags(resource_flags, tcp->u_arg[2] & ~0777, NULL) != 0)
 302                         tprintf("|");
 303                 tprintf("%#lo", tcp->u_arg[2] & 0777);
 304         }
 305         return 0;
 306 }
 307
 308 int sys_semctl(tcp)
 309 struct tcb *tcp;
 310 {
 311         if (entering(tcp)) {
 312                 tprintf("%lu", tcp->u_arg[0]);
 313                 tprintf(", %lu, ", tcp->u_arg[1]);
 314                 PRINTCTL(semctl_flags, tcp->u_arg[2], "SEM_???");
 315                 tprintf(", %#lx", tcp->u_arg[3]);
 316         }
 317         return 0;
 318 }
 319
 320 int sys_shmget(tcp)
 321 struct tcb *tcp;
 322 {
 323         if (entering(tcp)) {
 324                 if (tcp->u_arg[0])
 325                         tprintf("%lu", tcp->u_arg[0]);
 326                 else
 327                         tprintf("IPC_PRIVATE");
 328                 tprintf(", %lu", tcp->u_arg[1]);
 329                 tprintf(", ");
 330                 if (printflags(shm_resource_flags, tcp->u_arg[2] & ~0777, NULL) != 0)
 331                         tprintf("|");
 332                 tprintf("%#lo", tcp->u_arg[2] & 0777);
 333         }
 334         return 0;
 335 }
 336
 337 int sys_shmctl(tcp)
 338 struct tcb *tcp;
 339 {
 340         if (entering(tcp)) {
 341                 tprintf("%lu, ", tcp->u_arg[0]);
 342                 PRINTCTL(shmctl_flags, tcp->u_arg[1], "SHM_???");
 343 #ifdef LINUX
 344                 tprintf(", %#lx", tcp->u_arg[3]);
 345 #else /* !LINUX */
 346                 tprintf(", %#lx", tcp->u_arg[2]);
 347 #endif /* !LINUX */
 348         }
 349         return 0;
 350 }
 351
 352 int sys_shmat(tcp)
 353 struct tcb *tcp;
 354 {
 355 #ifdef LINUX
 356         unsigned long raddr;
 357 #endif /* LINUX */
 358
 359         if (exiting(tcp)) {
 360                 tprintf("%lu", tcp->u_arg[0]);
 361 #ifdef LINUX
 362                 tprintf(", %#lx", tcp->u_arg[3]);
 363                 tprintf(", ");
 364                 printflags(shm_flags, tcp->u_arg[1], "SHM_???");
 365 #else /* !LINUX */
 366                 tprintf(", %#lx", tcp->u_arg[1]);
 367                 tprintf(", ");
 368                 printflags(shm_flags, tcp->u_arg[2], "SHM_???");
 369 #endif /* !LINUX */
 370                 if (syserror(tcp))
 371                         return 0;
 372 #ifdef LINUX
 373                 if (umove(tcp, tcp->u_arg[2], &raddr) < 0)
 374                         return RVAL_NONE;
 375                 tcp->u_rval = raddr;
 376 #endif /* LINUX */
 377                 return RVAL_HEX;
 378         }
 379         return 0;
 380 }
 381
 382 int sys_shmdt(tcp)
 383 struct tcb *tcp;
 384 {
 385         if (entering(tcp))
 386 #ifdef LINUX
 387                 tprintf("%#lx", tcp->u_arg[3]);
 388 #else /* !LINUX */
 389                 tprintf("%#lx", tcp->u_arg[0]);
 390 #endif /* !LINUX */
 391         return 0;
 392 }
 393
 394 #endif /* defined(LINUX) || defined(SUNOS4) || defined(FREEBSD) */
 395
 396 #ifdef LINUX
 397 int sys_mq_open(tcp)
 398 struct tcb *tcp;
 399 {
 400         if (entering(tcp)) {
 401                 printpath(tcp, tcp->u_arg[0]);
 402                 tprintf(", ");
 403                 /* flags */
 404                 printflags(openmodes, tcp->u_arg[1] + 1, "O_???");
 405                 if (tcp->u_arg[1] & O_CREAT) {
 406 # ifndef HAVE_MQUEUE_H
 407                         tprintf(", %lx", tcp->u_arg[2]);
 408 # else
 409                         struct mq_attr attr;
 410                         /* mode */
 411                         tprintf(", %#lo, ", tcp->u_arg[2]);
 412                         if (umove(tcp, tcp->u_arg[3], &attr) < 0)
 413                                 tprintf("{ ??? }");
 414                         else
 415                                 tprintf("{mq_maxmsg=%ld, mq_msgsize=%ld}",
 416                                         attr.mq_maxmsg, attr.mq_msgsize);
 417 # endif
 418                 }
 419         }
 420         return 0;
 421 }
 422
 423 int sys_mq_timedsend(tcp)
 424 struct tcb *tcp;
 425 {
 426         if (entering(tcp)) {
 427                 tprintf("%ld, ", tcp->u_arg[0]);
 428                 printstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
 429                 tprintf(", %lu, %ld, ", tcp->u_arg[2], tcp->u_arg[3]);
 430                 printtv(tcp, tcp->u_arg[4]);
 431         }
 432         return 0;
 433 }
 434
 435 int sys_mq_timedreceive(tcp)
 436 struct tcb *tcp;
 437 {
 438         if (entering(tcp))
 439                 tprintf("%ld, ", tcp->u_arg[0]);
 440         else {
 441                 printstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
 442                 tprintf(", %lu, %ld, ", tcp->u_arg[2], tcp->u_arg[3]);
 443                 printtv(tcp, tcp->u_arg[4]);
 444         }
 445         return 0;
 446 }
 447
 448 int sys_mq_notify(tcp)
 449 struct tcb *tcp;
 450 {
 451         if (entering(tcp)) {
 452                 tprintf("%ld, ", tcp->u_arg[0]);
 453                 printsigevent(tcp, tcp->u_arg[1]);
 454         }
 455         return 0;
 456 }
 457
 458 static void printmqattr(tcp, addr)
 459 struct tcb *tcp;
 460 long addr;
 461 {
 462         if (addr == 0)
 463                 tprintf("NULL");
 464         else {
 465 # ifndef HAVE_MQUEUE_H
 466                 tprintf("%#lx", addr);
 467 # else
 468                 struct mq_attr attr;
 469                 if (umove(tcp, addr, &attr) < 0) {
 470                         tprintf("{...}");
 471                         return;
 472                 }
 473                 tprintf("{mq_flags=");
 474                 printflags(openmodes, attr.mq_flags + 1, "O_???");
 475                 tprintf(", mq_maxmsg=%ld, mq_msgsize=%ld, mq_curmsg=%ld}",
 476                         attr.mq_maxmsg, attr.mq_msgsize, attr.mq_curmsgs);
 477 # endif
 478         }
 479 }
 480
 481 int sys_mq_getsetattr(tcp)
 482 struct tcb *tcp;
 483 {
 484         if (entering(tcp)) {
 485                 tprintf("%ld, ", tcp->u_arg[0]);
 486                 printmqattr(tcp, tcp->u_arg[1]);
 487                 tprintf(", ");
 488         } else
 489                 printmqattr(tcp, tcp->u_arg[2]);
 490         return 0;
 491 }
 492 #endif