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
  31 #include "defs.h"
  32 #ifdef HAVE_MQUEUE_H
  33 # include <mqueue.h>
  34 #endif
  35 #include <fcntl.h>
  36 #include <sys/ipc.h>
  37 #include <sys/sem.h>
  38 #include <sys/msg.h>
  39 #include <sys/shm.h>
  40
  41 #ifndef MSG_STAT
  42 #define MSG_STAT 11
  43 #endif
  44 #ifndef MSG_INFO
  45 #define MSG_INFO 12
  46 #endif
  47 #ifndef SHM_STAT
  48 #define SHM_STAT 13
  49 #endif
  50 #ifndef SHM_INFO
  51 #define SHM_INFO 14
  52 #endif
  53 #ifndef SEM_STAT
  54 #define SEM_STAT 18
  55 #endif
  56 #ifndef SEM_INFO
  57 #define SEM_INFO 19
  58 #endif
  59
  60 #if !defined IPC_64
  61 # define IPC_64 0x100
  62 #endif
  63
  64 extern void printsigevent(struct tcb *tcp, long arg);
  65
  66 #include "xlat/msgctl_flags.h"
  67 #include "xlat/semctl_flags.h"
  68 #include "xlat/shmctl_flags.h"
  69 #include "xlat/resource_flags.h"
  70 #include "xlat/shm_resource_flags.h"
  71 #include "xlat/shm_flags.h"
  72 #include "xlat/ipc_msg_flags.h"
  73 #include "xlat/semop_flags.h"
  74
  75 int sys_msgget(struct tcb *tcp)
  76 {
  77         if (entering(tcp)) {
  78                 if (tcp->u_arg[0])
  79                         tprintf("%#lx, ", tcp->u_arg[0]);
  80                 else
  81                         tprints("IPC_PRIVATE, ");
  82                 if (printflags(resource_flags, tcp->u_arg[1] & ~0777, NULL) != 0)
  83                         tprints("|");
  84                 tprintf("%#lo", tcp->u_arg[1] & 0777);
  85         }
  86         return 0;
  87 }
  88
  89 #ifdef IPC_64
  90 # define PRINTCTL(flagset, arg, dflt) \
  91         if ((arg) & IPC_64) tprints("IPC_64|"); \
  92         printxval((flagset), (arg) &~ IPC_64, dflt)
  93 #else
  94 # define PRINTCTL printxval
  95 #endif
  96
  97 static int
  98 indirect_ipccall(struct tcb *tcp)
  99 {
 100         return tcp->s_ent->sys_flags & TRACE_INDIRECT_SUBCALL;
 101 }
 102
 103 int sys_msgctl(struct tcb *tcp)
 104 {
 105         if (entering(tcp)) {
 106                 tprintf("%lu, ", tcp->u_arg[0]);
 107                 PRINTCTL(msgctl_flags, tcp->u_arg[1], "MSG_???");
 108                 tprintf(", %#lx", tcp->u_arg[indirect_ipccall(tcp) ? 3 : 2]);
 109         }
 110         return 0;
 111 }
 112
 113 static void
 114 tprint_msgsnd(struct tcb *tcp, long addr, unsigned long count,
 115               unsigned long flags)
 116 {
 117         long mtype;
 118
 119         if (umove(tcp, addr, &mtype) < 0) {
 120                 tprintf("%#lx", addr);
 121         } else {
 122                 tprintf("{%lu, ", mtype);
 123                 printstr(tcp, addr + sizeof(mtype), count);
 124                 tprints("}");
 125         }
 126         tprintf(", %lu, ", count);
 127         printflags(ipc_msg_flags, flags, "MSG_???");
 128 }
 129
 130 int sys_msgsnd(struct tcb *tcp)
 131 {
 132         if (entering(tcp)) {
 133                 tprintf("%d, ", (int) tcp->u_arg[0]);
 134                 if (indirect_ipccall(tcp)) {
 135                         tprint_msgsnd(tcp, tcp->u_arg[3], tcp->u_arg[1],
 136                                       tcp->u_arg[2]);
 137                 } else {
 138                         tprint_msgsnd(tcp, tcp->u_arg[1], tcp->u_arg[2],
 139                                       tcp->u_arg[3]);
 140                 }
 141         }
 142         return 0;
 143 }
 144
 145 static void
 146 tprint_msgrcv(struct tcb *tcp, long addr, unsigned long count, long msgtyp)
 147 {
 148         long mtype;
 149
 150         if (syserror(tcp) || umove(tcp, addr, &mtype) < 0) {
 151                 tprintf("%#lx", addr);
 152         } else {
 153                 tprintf("{%lu, ", mtype);
 154                 printstr(tcp, addr + sizeof(mtype), count);
 155                 tprints("}");
 156         }
 157         tprintf(", %lu, %ld, ", count, msgtyp);
 158 }
 159
 160 int sys_msgrcv(struct tcb *tcp)
 161 {
 162         if (entering(tcp)) {
 163                 tprintf("%d, ", (int) tcp->u_arg[0]);
 164         } else {
 165                 if (indirect_ipccall(tcp)) {
 166                         struct ipc_wrapper {
 167                                 struct msgbuf *msgp;
 168                                 long msgtyp;
 169                         } tmp;
 170
 171                         if (umove(tcp, tcp->u_arg[3], &tmp) < 0) {
 172                                 tprintf("%#lx, %lu, ",
 173                                         tcp->u_arg[3], tcp->u_arg[1]);
 174                         } else {
 175                                 tprint_msgrcv(tcp, (long) tmp.msgp,
 176                                         tcp->u_arg[1], tmp.msgtyp);
 177                         }
 178                         printflags(ipc_msg_flags, tcp->u_arg[2], "MSG_???");
 179                 } else {
 180                         tprint_msgrcv(tcp, tcp->u_arg[1],
 181                                 tcp->u_arg[2], tcp->u_arg[3]);
 182                         printflags(ipc_msg_flags, tcp->u_arg[4], "MSG_???");
 183                 }
 184         }
 185         return 0;
 186 }
 187
 188 static void
 189 tprint_sembuf(struct tcb *tcp, long addr, unsigned long count)
 190 {
 191         unsigned long i, max_count;
 192
 193         if (abbrev(tcp))
 194                 max_count = (max_strlen < count) ? max_strlen : count;
 195         else
 196                 max_count = count;
 197
 198         if (!max_count) {
 199                 tprintf("%#lx, %lu", addr, count);
 200                 return;
 201         }
 202
 203         for (i = 0; i < max_count; ++i) {
 204                 struct sembuf sb;
 205                 if (i)
 206                         tprints(", ");
 207                 if (umove(tcp, addr + i * sizeof(struct sembuf), &sb) < 0) {
 208                         if (i) {
 209                                 tprints("{???}");
 210                                 break;
 211                         } else {
 212                                 tprintf("%#lx, %lu", addr, count);
 213                                 return;
 214                         }
 215                 } else {
 216                         if (!i)
 217                                 tprints("{");
 218                         tprintf("{%u, %d, ", sb.sem_num, sb.sem_op);
 219                         printflags(semop_flags, sb.sem_flg, "SEM_???");
 220                         tprints("}");
 221                 }
 222         }
 223
 224         if (i < max_count || max_count < count)
 225                 tprints(", ...");
 226
 227         tprintf("}, %lu", count);
 228 }
 229
 230 int sys_semop(struct tcb *tcp)
 231 {
 232         if (entering(tcp)) {
 233                 tprintf("%lu, ", tcp->u_arg[0]);
 234                 if (indirect_ipccall(tcp)) {
 235                         tprint_sembuf(tcp, tcp->u_arg[3], tcp->u_arg[1]);
 236                 } else {
 237                         tprint_sembuf(tcp, tcp->u_arg[1], tcp->u_arg[2]);
 238                 }
 239         }
 240         return 0;
 241 }
 242
 243 int sys_semtimedop(struct tcb *tcp)
 244 {
 245         if (entering(tcp)) {
 246                 tprintf("%lu, ", tcp->u_arg[0]);
 247                 if (indirect_ipccall(tcp)) {
 248                         tprint_sembuf(tcp, tcp->u_arg[3], tcp->u_arg[1]);
 249                         tprints(", ");
 250 #if defined(S390) || defined(S390X)
 251                         printtv(tcp, tcp->u_arg[2]);
 252 #else
 253                         printtv(tcp, tcp->u_arg[4]);
 254 #endif
 255                 } else {
 256                         tprint_sembuf(tcp, tcp->u_arg[1], tcp->u_arg[2]);
 257                         tprints(", ");
 258                         printtv(tcp, tcp->u_arg[3]);
 259                 }
 260         }
 261         return 0;
 262 }
 263
 264 int sys_semget(struct tcb *tcp)
 265 {
 266         if (entering(tcp)) {
 267                 if (tcp->u_arg[0])
 268                         tprintf("%#lx", tcp->u_arg[0]);
 269                 else
 270                         tprints("IPC_PRIVATE");
 271                 tprintf(", %lu, ", tcp->u_arg[1]);
 272                 if (printflags(resource_flags, tcp->u_arg[2] & ~0777, NULL) != 0)
 273                         tprints("|");
 274                 tprintf("%#lo", tcp->u_arg[2] & 0777);
 275         }
 276         return 0;
 277 }
 278
 279 int sys_semctl(struct tcb *tcp)
 280 {
 281         if (entering(tcp)) {
 282                 tprintf("%lu, %lu, ", tcp->u_arg[0], tcp->u_arg[1]);
 283                 PRINTCTL(semctl_flags, tcp->u_arg[2], "SEM_???");
 284                 tprints(", ");
 285                 if (indirect_ipccall(tcp)) {
 286                         if (current_wordsize == sizeof(int)) {
 287                                 printnum_int(tcp, tcp->u_arg[3], "%#x");
 288                         } else {
 289                                 printnum_long(tcp, tcp->u_arg[3], "%#lx");
 290                         }
 291                 } else {
 292                         tprintf("%#lx", tcp->u_arg[3]);
 293                 }
 294         }
 295         return 0;
 296 }
 297
 298 int sys_shmget(struct tcb *tcp)
 299 {
 300         if (entering(tcp)) {
 301                 if (tcp->u_arg[0])
 302                         tprintf("%#lx", tcp->u_arg[0]);
 303                 else
 304                         tprints("IPC_PRIVATE");
 305                 tprintf(", %lu, ", tcp->u_arg[1]);
 306                 if (printflags(shm_resource_flags, tcp->u_arg[2] & ~0777, NULL) != 0)
 307                         tprints("|");
 308                 tprintf("%#lo", tcp->u_arg[2] & 0777);
 309         }
 310         return 0;
 311 }
 312
 313 int sys_shmctl(struct tcb *tcp)
 314 {
 315         if (entering(tcp)) {
 316                 tprintf("%lu, ", tcp->u_arg[0]);
 317                 PRINTCTL(shmctl_flags, tcp->u_arg[1], "SHM_???");
 318                 if (indirect_ipccall(tcp)) {
 319                         tprintf(", %#lx", tcp->u_arg[3]);
 320                 } else {
 321                         tprintf(", %#lx", tcp->u_arg[2]);
 322                 }
 323         }
 324         return 0;
 325 }
 326
 327 int sys_shmat(struct tcb *tcp)
 328 {
 329         if (exiting(tcp)) {
 330                 tprintf("%lu", tcp->u_arg[0]);
 331                 if (indirect_ipccall(tcp)) {
 332                         tprintf(", %#lx, ", tcp->u_arg[3]);
 333                         printflags(shm_flags, tcp->u_arg[1], "SHM_???");
 334                 } else {
 335                         tprintf(", %#lx, ", tcp->u_arg[1]);
 336                         printflags(shm_flags, tcp->u_arg[2], "SHM_???");
 337                 }
 338                 if (syserror(tcp))
 339                         return 0;
 340                 if (indirect_ipccall(tcp)) {
 341                         unsigned long raddr;
 342                         if (umove(tcp, tcp->u_arg[2], &raddr) < 0)
 343                                 return RVAL_NONE;
 344                         tcp->u_rval = raddr;
 345                 }
 346                 return RVAL_HEX;
 347         }
 348         return 0;
 349 }
 350
 351 int sys_shmdt(struct tcb *tcp)
 352 {
 353         if (entering(tcp)) {
 354                 if (indirect_ipccall(tcp)) {
 355                         tprintf("%#lx", tcp->u_arg[3]);
 356                 } else {
 357                         tprintf("%#lx", tcp->u_arg[0]);
 358                 }
 359         }
 360         return 0;
 361 }
 362
 363 int
 364 sys_mq_open(struct tcb *tcp)
 365 {
 366         if (entering(tcp)) {
 367                 printpath(tcp, tcp->u_arg[0]);
 368                 tprints(", ");
 369                 /* flags */
 370                 tprint_open_modes(tcp->u_arg[1]);
 371                 if (tcp->u_arg[1] & O_CREAT) {
 372 # ifndef HAVE_MQUEUE_H
 373                         tprintf(", %lx", tcp->u_arg[2]);
 374 # else
 375                         struct mq_attr attr;
 376                         /* mode */
 377                         tprintf(", %#lo, ", tcp->u_arg[2]);
 378                         if (umove(tcp, tcp->u_arg[3], &attr) < 0)
 379                                 tprints("{???}");
 380                         else
 381                                 tprintf("{mq_maxmsg=%ld, mq_msgsize=%ld}",
 382                                         (long) attr.mq_maxmsg,
 383                                         (long) attr.mq_msgsize);
 384 # endif
 385                 }
 386         }
 387         return 0;
 388 }
 389
 390 int
 391 sys_mq_timedsend(struct tcb *tcp)
 392 {
 393         if (entering(tcp)) {
 394                 tprintf("%ld, ", tcp->u_arg[0]);
 395                 printstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
 396                 tprintf(", %lu, %ld, ", tcp->u_arg[2], tcp->u_arg[3]);
 397                 printtv(tcp, tcp->u_arg[4]);
 398         }
 399         return 0;
 400 }
 401
 402 int
 403 sys_mq_timedreceive(struct tcb *tcp)
 404 {
 405         if (entering(tcp))
 406                 tprintf("%ld, ", tcp->u_arg[0]);
 407         else {
 408                 printstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
 409                 tprintf(", %lu, %ld, ", tcp->u_arg[2], tcp->u_arg[3]);
 410                 printtv(tcp, tcp->u_arg[4]);
 411         }
 412         return 0;
 413 }
 414
 415 int
 416 sys_mq_notify(struct tcb *tcp)
 417 {
 418         if (entering(tcp)) {
 419                 tprintf("%ld, ", tcp->u_arg[0]);
 420                 printsigevent(tcp, tcp->u_arg[1]);
 421         }
 422         return 0;
 423 }
 424
 425 static void
 426 printmqattr(struct tcb *tcp, long addr)
 427 {
 428         if (addr == 0)
 429                 tprints("NULL");
 430         else {
 431 # ifndef HAVE_MQUEUE_H
 432                 tprintf("%#lx", addr);
 433 # else
 434                 struct mq_attr attr;
 435                 if (umove(tcp, addr, &attr) < 0) {
 436                         tprints("{...}");
 437                         return;
 438                 }
 439                 tprints("{mq_flags=");
 440                 tprint_open_modes(attr.mq_flags);
 441                 tprintf(", mq_maxmsg=%ld, mq_msgsize=%ld, mq_curmsg=%ld}",
 442                         (long) attr.mq_maxmsg, (long) attr.mq_msgsize,
 443                         (long) attr.mq_curmsgs);
 444 # endif
 445         }
 446 }
 447
 448 int
 449 sys_mq_getsetattr(struct tcb *tcp)
 450 {
 451         if (entering(tcp)) {
 452                 tprintf("%ld, ", tcp->u_arg[0]);
 453                 printmqattr(tcp, tcp->u_arg[1]);
 454                 tprints(", ");
 455         } else
 456                 printmqattr(tcp, tcp->u_arg[2]);
 457         return 0;
 458 }
 459
 460 int
 461 sys_ipc(struct tcb *tcp)
 462 {
 463         return printargs(tcp);
 464 }