gdb/testsuite/gdb.reverse/time-reverse.c

   1 /* This testcase is part of GDB, the GNU debugger.
   2
   3    Copyright 2008-2024 Free Software Foundation, Inc.
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 3 of the License, or
   8    (at your option) any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  17
  18 #define _GNU_SOURCE
  19 #include <time.h>
  20 #include <sys/syscall.h>
  21 #include <unistd.h>
  22
  23 #ifdef USE_SYSCALL
  24 # define my_time(TLOC) syscall (SYS_time, TLOC)
  25 #else
  26 # define my_time(TLOC) time (TLOC)
  27 #endif
  28
  29 void
  30 marker1 (void)
  31 {
  32 }
  33
  34 void
  35 marker2 (void)
  36 {
  37 }
  38
  39 time_t time_global = -1;
  40
  41 int
  42 main (void)
  43 {
  44   /* Call once before recording to resolve the PLT, if any.  This reduces the
  45      amount of instructions that is recorded.  */
  46   my_time (&time_global);
  47
  48   /* Reset back to initial value.  */
  49   time_global = -1;
  50
  51   /* Start recording here.  */
  52   marker1 ();
  53
  54   my_time (&time_global);
  55
  56   /* Stop recording here.  */
  57   marker2 ();
  58
  59   return 0;
  60 }