gmon/profil.c

   1 /* Low-level statistical profiling support function.  Stub version.
   2    Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library 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 GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #include <sys/types.h>
  21 #include <unistd.h>
  22 #include <errno.h>
  23
  24 /* Enable statistical profiling, writing samples of the PC into at most
  25    SIZE bytes of SAMPLE_BUFFER; every processor clock tick while profiling
  26    is enabled, the system examines the user PC and increments
  27    SAMPLE_BUFFER[((PC - OFFSET) / 2) * SCALE / 65536].  If SCALE is zero,
  28    disable profiling.  Returns zero on success, -1 on error.  */
  29
  30 int
  31 __profil (u_short *sample_buffer, size_t size, size_t offset, u_int scale)
  32 {
  33   if (scale == 0)
  34     /* Disable profiling.  */
  35     return 0;
  36
  37   __set_errno (ENOSYS);
  38   return -1;
  39 }
  40 weak_alias (__profil, profil)
  41 stub_warning (profil)
  42 #include <stub-tag.h>