sysdeps/unix/sysv/linux/x86_64/profil-counter.h

   1 /* Low-level statistical profiling support function.  Linux/x86-64 version.
   2    Copyright (C) 2001-2014 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, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <signal.h>
  20 #include <sigcontextinfo.h>
  21
  22 static void
  23 profil_counter (int signo, SIGCONTEXT scp)
  24 {
  25   profil_count ((void *) GET_PC (scp));
  26
  27   /* This is a hack to prevent the compiler from implementing the
  28      above function call as a sibcall.  The sibcall would overwrite
  29      the signal context.  */
  30   asm volatile ("");
  31 }