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

   1 /*
   2  * Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
   3  * Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
   4  * Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. The name of the author may not be used to endorse or promote products
  16  *    derived from this software without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  21  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  23  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  27  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28  */
  29
  30 #include "defs.h"
  31 #include <fcntl.h>
  32 #include <signal.h>
  33 #include <sys/timex.h>
  34
  35 #ifndef UTIME_NOW
  36 #define UTIME_NOW ((1l << 30) - 1l)
  37 #endif
  38 #ifndef UTIME_OMIT
  39 #define UTIME_OMIT ((1l << 30) - 2l)
  40 #endif
  41
  42 #if SUPPORTED_PERSONALITIES > 1
  43 # if defined X86_64 || defined X32
  44 #  define current_time_t_is_compat (current_personality == 1)
  45 # else
  46 #  define current_time_t_is_compat (current_wordsize == 4)
  47 # endif
  48 #else
  49 # define current_time_t_is_compat 0
  50 #endif
  51
  52 struct timeval32
  53 {
  54         u_int32_t tv_sec, tv_usec;
  55 };
  56
  57 void
  58 printtv_bitness(struct tcb *tcp, long addr, enum bitness_t bitness, int special)
  59 {
  60         char buf[TIMEVAL_TEXT_BUFSIZE];
  61         sprinttv(buf, tcp, addr, bitness, special);
  62         tprints(buf);
  63 }
  64
  65 static char *
  66 do_sprinttv(char *buf, const uintmax_t sec, const uintmax_t usec,
  67             const int special)
  68 {
  69         if (special) {
  70                 switch (usec) {
  71                         case UTIME_NOW:
  72                                 return stpcpy(buf, "UTIME_NOW");
  73                         case UTIME_OMIT:
  74                                 return stpcpy(buf, "UTIME_OMIT");
  75                 }
  76         }
  77         return buf + sprintf(buf, "{%ju, %ju}", sec, usec);
  78 }
  79
  80 char *
  81 sprinttv(char *buf, struct tcb *tcp, long addr, enum bitness_t bitness, int special)
  82 {
  83         if (addr == 0)
  84                 return stpcpy(buf, "NULL");
  85
  86         if (!verbose(tcp) || (exiting(tcp) && syserror(tcp)))
  87                 return buf + sprintf(buf, "%#lx", addr);
  88
  89         if (bitness == BITNESS_32 || current_time_t_is_compat)
  90         {
  91                 struct timeval32 tv;
  92
  93                 if (umove(tcp, addr, &tv) >= 0)
  94                         return do_sprinttv(buf, tv.tv_sec, tv.tv_usec, special);
  95         } else {
  96                 struct timeval tv;
  97
  98                 if (umove(tcp, addr, &tv) >= 0)
  99                         return do_sprinttv(buf, tv.tv_sec, tv.tv_usec, special);
 100         }
 101
 102         return buf + sprintf(buf, "%#lx", addr);
 103 }
 104
 105 void
 106 print_timespec(struct tcb *tcp, long addr)
 107 {
 108         char buf[TIMESPEC_TEXT_BUFSIZE];
 109         sprint_timespec(buf, tcp, addr);
 110         tprints(buf);
 111 }
 112
 113 void
 114 sprint_timespec(char *buf, struct tcb *tcp, long addr)
 115 {
 116         if (addr == 0)
 117                 strcpy(buf, "NULL");
 118         else if (!verbose(tcp))
 119                 sprintf(buf, "%#lx", addr);
 120         else {
 121                 int rc;
 122
 123 #if SUPPORTED_PERSONALITIES > 1
 124                 if (current_time_t_is_compat) {
 125                         struct timeval32 tv;
 126
 127                         rc = umove(tcp, addr, &tv);
 128                         if (rc >= 0)
 129                                 sprintf(buf, "{%u, %u}",
 130                                         tv.tv_sec, tv.tv_usec);
 131                 } else
 132 #endif
 133                 {
 134                         struct timespec ts;
 135
 136                         rc = umove(tcp, addr, &ts);
 137                         if (rc >= 0)
 138                                 sprintf(buf, "{%ju, %ju}",
 139                                         (uintmax_t) ts.tv_sec,
 140                                         (uintmax_t) ts.tv_nsec);
 141                 }
 142                 if (rc < 0)
 143                         strcpy(buf, "{...}");
 144         }
 145 }
 146
 147 SYS_FUNC(gettimeofday)
 148 {
 149         if (exiting(tcp)) {
 150                 printtv(tcp, tcp->u_arg[0]);
 151                 tprints(", ");
 152                 printtv(tcp, tcp->u_arg[1]);
 153         }
 154         return 0;
 155 }
 156
 157 #ifdef ALPHA
 158 SYS_FUNC(osf_gettimeofday)
 159 {
 160         if (exiting(tcp)) {
 161                 printtv_bitness(tcp, tcp->u_arg[0], BITNESS_32, 0);
 162                 tprints(", ");
 163                 printtv_bitness(tcp, tcp->u_arg[1], BITNESS_32, 0);
 164         }
 165         return 0;
 166 }
 167 #endif
 168
 169 SYS_FUNC(settimeofday)
 170 {
 171         printtv(tcp, tcp->u_arg[0]);
 172         tprints(", ");
 173         printtv(tcp, tcp->u_arg[1]);
 174
 175         return RVAL_DECODED;
 176 }
 177
 178 #ifdef ALPHA
 179 SYS_FUNC(osf_settimeofday)
 180 {
 181         printtv_bitness(tcp, tcp->u_arg[0], BITNESS_32, 0);
 182         tprints(", ");
 183         printtv_bitness(tcp, tcp->u_arg[1], BITNESS_32, 0);
 184
 185         return RVAL_DECODED;
 186 }
 187 #endif
 188
 189 SYS_FUNC(nanosleep)
 190 {
 191         if (entering(tcp)) {
 192                 print_timespec(tcp, tcp->u_arg[0]);
 193                 tprints(", ");
 194         } else {
 195
 196                 /*
 197                  * Second (returned) timespec is only significant if syscall
 198                  * was interrupted.  On success and in case of other errors we
 199                  * print only its address, since kernel doesn't modify it,
 200                  * and printing the value may show uninitialized data.
 201                  */
 202                 if (is_erestart(tcp)) {
 203                         temporarily_clear_syserror(tcp);
 204                         print_timespec(tcp, tcp->u_arg[1]);
 205                         restore_cleared_syserror(tcp);
 206                 } else {
 207                         printaddr(tcp->u_arg[1]);
 208                 }
 209         }
 210         return 0;
 211 }
 212
 213 #include "xlat/itimer_which.h"
 214
 215 SYS_FUNC(getitimer)
 216 {
 217         if (entering(tcp)) {
 218                 printxval(itimer_which, tcp->u_arg[0], "ITIMER_???");
 219                 tprints(", ");
 220         } else {
 221                 print_itimerval(tcp, tcp->u_arg[1]);
 222         }
 223         return 0;
 224 }
 225
 226 #ifdef ALPHA
 227 SYS_FUNC(osf_getitimer)
 228 {
 229         if (entering(tcp)) {
 230                 printxval(itimer_which, tcp->u_arg[0], "ITIMER_???");
 231                 tprints(", ");
 232         } else {
 233                 print_itimerval32(tcp, tcp->u_arg[1]);
 234         }
 235         return 0;
 236 }
 237 #endif
 238
 239 SYS_FUNC(setitimer)
 240 {
 241         if (entering(tcp)) {
 242                 printxval(itimer_which, tcp->u_arg[0], "ITIMER_???");
 243                 tprints(", ");
 244                 print_itimerval(tcp, tcp->u_arg[1]);
 245                 tprints(", ");
 246         } else {
 247                 print_itimerval(tcp, tcp->u_arg[2]);
 248         }
 249         return 0;
 250 }
 251
 252 #ifdef ALPHA
 253 SYS_FUNC(osf_setitimer)
 254 {
 255         if (entering(tcp)) {
 256                 printxval(itimer_which, tcp->u_arg[0], "ITIMER_???");
 257                 tprints(", ");
 258                 print_itimerval32(tcp, tcp->u_arg[1]);
 259                 tprints(", ");
 260         } else {
 261                 print_itimerval32(tcp, tcp->u_arg[2]);
 262         }
 263         return 0;
 264 }
 265 #endif
 266
 267 #include "xlat/adjtimex_state.h"
 268
 269 static int
 270 do_adjtimex(struct tcb *tcp, long addr)
 271 {
 272         if (print_timex(tcp, addr))
 273                 return 0;
 274         tcp->auxstr = xlookup(adjtimex_state, tcp->u_rval);
 275         if (tcp->auxstr)
 276                 return RVAL_STR;
 277         return 0;
 278 }
 279
 280 SYS_FUNC(adjtimex)
 281 {
 282         if (exiting(tcp))
 283                 return do_adjtimex(tcp, tcp->u_arg[0]);
 284         return 0;
 285 }
 286
 287 #include "xlat/clockflags.h"
 288 #include "xlat/clocknames.h"
 289
 290 static void
 291 printclockname(int clockid)
 292 {
 293 #ifdef CLOCKID_TO_FD
 294 # include "xlat/cpuclocknames.h"
 295
 296         if (clockid < 0) {
 297                 if ((clockid & CLOCKFD_MASK) == CLOCKFD)
 298                         tprintf("FD_TO_CLOCKID(%d)", CLOCKID_TO_FD(clockid));
 299                 else {
 300                         if(CPUCLOCK_PERTHREAD(clockid))
 301                                 tprintf("MAKE_THREAD_CPUCLOCK(%d,", CPUCLOCK_PID(clockid));
 302                         else
 303                                 tprintf("MAKE_PROCESS_CPUCLOCK(%d,", CPUCLOCK_PID(clockid));
 304                         printxval(cpuclocknames, clockid & CLOCKFD_MASK, "CPUCLOCK_???");
 305                         tprints(")");
 306                 }
 307         }
 308         else
 309 #endif
 310                 printxval(clocknames, clockid, "CLOCK_???");
 311 }
 312
 313 SYS_FUNC(clock_settime)
 314 {
 315         printclockname(tcp->u_arg[0]);
 316         tprints(", ");
 317         printtv(tcp, tcp->u_arg[1]);
 318
 319         return RVAL_DECODED;
 320 }
 321
 322 SYS_FUNC(clock_gettime)
 323 {
 324         if (entering(tcp)) {
 325                 printclockname(tcp->u_arg[0]);
 326                 tprints(", ");
 327         } else {
 328                 printtv(tcp, tcp->u_arg[1]);
 329         }
 330         return 0;
 331 }
 332
 333 SYS_FUNC(clock_nanosleep)
 334 {
 335         if (entering(tcp)) {
 336                 printclockname(tcp->u_arg[0]);
 337                 tprints(", ");
 338                 printflags(clockflags, tcp->u_arg[1], "TIMER_???");
 339                 tprints(", ");
 340                 printtv(tcp, tcp->u_arg[2]);
 341                 tprints(", ");
 342         } else {
 343                 /*
 344                  * Second (returned) timespec is only significant
 345                  * if syscall was interrupted and flags is not TIMER_ABSTIME.
 346                  */
 347                 if (!tcp->u_arg[1] && is_erestart(tcp)) {
 348                         temporarily_clear_syserror(tcp);
 349                         printtv(tcp, tcp->u_arg[3]);
 350                         restore_cleared_syserror(tcp);
 351                 } else {
 352                         printaddr(tcp->u_arg[3]);
 353                 }
 354         }
 355         return 0;
 356 }
 357
 358 SYS_FUNC(clock_adjtime)
 359 {
 360         if (exiting(tcp))
 361                 return do_adjtimex(tcp, tcp->u_arg[1]);
 362         printclockname(tcp->u_arg[0]);
 363         tprints(", ");
 364         return 0;
 365 }
 366
 367 SYS_FUNC(timer_create)
 368 {
 369         if (entering(tcp)) {
 370                 printclockname(tcp->u_arg[0]);
 371                 tprints(", ");
 372                 print_sigevent(tcp, tcp->u_arg[1]);
 373                 tprints(", ");
 374         } else {
 375                 printnum_int(tcp, tcp->u_arg[2], "%d");
 376         }
 377         return 0;
 378 }
 379
 380 SYS_FUNC(timer_settime)
 381 {
 382         if (entering(tcp)) {
 383                 tprintf("%d, ", (int) tcp->u_arg[0]);
 384                 printflags(clockflags, tcp->u_arg[1], "TIMER_???");
 385                 tprints(", ");
 386                 print_itimerspec(tcp, tcp->u_arg[2]);
 387                 tprints(", ");
 388         } else {
 389                 print_itimerspec(tcp, tcp->u_arg[3]);
 390         }
 391         return 0;
 392 }
 393
 394 SYS_FUNC(timer_gettime)
 395 {
 396         if (entering(tcp)) {
 397                 tprintf("%d, ", (int) tcp->u_arg[0]);
 398         } else {
 399                 print_itimerspec(tcp, tcp->u_arg[1]);
 400         }
 401         return 0;
 402 }
 403
 404 #include "xlat/timerfdflags.h"
 405
 406 SYS_FUNC(timerfd)
 407 {
 408         tprintf("%ld, ", tcp->u_arg[0]);
 409         printclockname(tcp->u_arg[0]);
 410         tprints(", ");
 411         printflags(timerfdflags, tcp->u_arg[2], "TFD_???");
 412         tprints(", ");
 413         print_itimerspec(tcp, tcp->u_arg[3]);
 414
 415         return RVAL_DECODED | RVAL_FD;
 416 }
 417
 418 SYS_FUNC(timerfd_create)
 419 {
 420         printclockname(tcp->u_arg[0]);
 421         tprints(", ");
 422         printflags(timerfdflags, tcp->u_arg[1], "TFD_???");
 423
 424         return RVAL_DECODED | RVAL_FD;
 425 }
 426
 427 SYS_FUNC(timerfd_settime)
 428 {
 429         printfd(tcp, tcp->u_arg[0]);
 430         tprints(", ");
 431         printflags(timerfdflags, tcp->u_arg[1], "TFD_???");
 432         tprints(", ");
 433         print_itimerspec(tcp, tcp->u_arg[2]);
 434         tprints(", ");
 435         print_itimerspec(tcp, tcp->u_arg[3]);
 436
 437         return RVAL_DECODED;
 438 }
 439
 440 SYS_FUNC(timerfd_gettime)
 441 {
 442         if (entering(tcp)) {
 443                 printfd(tcp, tcp->u_arg[0]);
 444                 tprints(", ");
 445         } else {
 446                 print_itimerspec(tcp, tcp->u_arg[1]);
 447         }
 448         return 0;
 449 }