1 /*
   2  * Copyright (c) 1997, 2006, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 // This file holds platform-independent bodies of inline functions for frames.
  26 
  27 // Note: The bcx usually contains the bcp; however during GC it contains the bci
  28 //       (changed by gc_prologue() and gc_epilogue()) to be methodOop position
  29 //       independent. These accessors make sure the correct value is returned
  30 //       by testing the range of the bcx value. bcp's are guaranteed to be above
  31 //       max_method_code_size, since methods are always allocated in OldSpace and
  32 //       Eden is allocated before OldSpace.
  33 //
  34 //       The bcp is accessed sometimes during GC for ArgumentDescriptors; than
  35 //       the correct translation has to be performed (was bug).
  36 
  37 inline bool frame::is_bci(intptr_t bcx) {
  38 #ifdef _LP64
  39   return ((uintptr_t) bcx) <= ((uintptr_t) max_method_code_size) ;
  40 #else
  41   return 0 <= bcx && bcx <= max_method_code_size;
  42 #endif
  43 }
  44 
  45 inline bool frame::is_entry_frame() const {
  46   return StubRoutines::returns_to_call_stub(pc());
  47 }
  48 
  49 inline bool frame::is_first_frame() const {
  50   return is_entry_frame() && entry_frame_is_first();
  51 }
  52 
  53 // here are the platform-dependent bodies:
  54 
  55 # include "incls/_frame_pd.inline.hpp.incl"