sysdeps/stub/profil.c

   1 /* Low-level statistical profiling support function.  Stub version.
   2 Copyright (C) 1995, 1996 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 Library General Public License as
   7 published by the Free Software Foundation; either version 2 of the
   8 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 Library General Public License for more details.
  14
  15 You should have received a copy of the GNU Library General Public
  16 License along with the GNU C Library; see the file COPYING.LIB.  If
  17 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
  18 Cambridge, MA 02139, 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 stub_warning (profil)