1 /*
   2  * Copyright (c) 2003, 2012, Oracle and/or its affiliates. All rights reserved.
   3  * Copyright 2008, 2009, 2010 Red Hat, Inc.
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This code is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License version 2 only, as
   8  * published by the Free Software Foundation.
   9  *
  10  * This code is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * version 2 for more details (a copy is included in the LICENSE file that
  14  * accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License version
  17  * 2 along with this work; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  21  * or visit www.oracle.com if you need additional information or have any
  22  * questions.
  23  *
  24  */
  25 
  26 #ifndef CPU_ZERO_VM_ENTRY_ZERO_HPP
  27 #define CPU_ZERO_VM_ENTRY_ZERO_HPP
  28 
  29 #include "interpreter/cppInterpreter.hpp"
  30 
  31 class ZeroEntry {
  32  public:
  33   ZeroEntry() {
  34     ShouldNotCallThis();
  35   }
  36 
  37  private:
  38   address _entry_point;
  39 
  40  public:
  41   address entry_point() const {
  42     return _entry_point;
  43   }
  44   void set_entry_point(address entry_point) {
  45     _entry_point = entry_point;
  46   }
  47 
  48  private:
  49   typedef int (*NormalEntryFunc)(Method* method,
  50                                  intptr_t  base_pc,
  51                                  TRAPS);
  52   typedef int (*OSREntryFunc)(Method* method,
  53                               address   osr_buf,
  54                               intptr_t  base_pc,
  55                               TRAPS);
  56 
  57  public:
  58   void invoke(Method* method, TRAPS) const {
  59     maybe_deoptimize(
  60       ((NormalEntryFunc) entry_point())(method, (intptr_t) this, THREAD),
  61       THREAD);
  62   }
  63   void invoke_osr(Method* method, address osr_buf, TRAPS) const {
  64     maybe_deoptimize(
  65       ((OSREntryFunc) entry_point())(method, osr_buf, (intptr_t) this, THREAD),
  66       THREAD);
  67   }
  68 
  69  private:
  70   static void maybe_deoptimize(int deoptimized_frames, TRAPS) {
  71     if (deoptimized_frames)
  72       CppInterpreter::main_loop(deoptimized_frames - 1, THREAD);
  73   }
  74 
  75  public:
  76   static ByteSize entry_point_offset() {
  77     return byte_offset_of(ZeroEntry, _entry_point);
  78   }
  79 };
  80 
  81 #endif // CPU_ZERO_VM_ENTRY_ZERO_HPP