1 /*
   2  * Copyright (c) 2003, 2012, Oracle and/or its affiliates. All rights reserved.
   3  * Copyright 2008, 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_INTERPRETERFRAME_ZERO_HPP
  27 #define CPU_ZERO_VM_INTERPRETERFRAME_ZERO_HPP
  28 
  29 #include "interpreter/bytecodeInterpreter.hpp"
  30 #include "oops/method.hpp"
  31 #include "runtime/thread.hpp"
  32 #include "stack_zero.hpp"
  33 
  34 #ifdef CC_INTERP
  35 // |  ...               |
  36 // +--------------------+  ------------------
  37 // | stack slot n-1     |       low addresses
  38 // |  ...               |
  39 // | stack slot 0       |
  40 // | monitor 0 (maybe)  |
  41 // |  ...               |
  42 // | interpreter state  |
  43 // |  ...               |
  44 // | frame_type         |
  45 // | next_frame         |      high addresses
  46 // +--------------------+  ------------------
  47 // |  ...               |
  48 
  49 class InterpreterFrame : public ZeroFrame {
  50   friend class AbstractInterpreter;
  51 
  52  private:
  53   InterpreterFrame() : ZeroFrame() {
  54     ShouldNotCallThis();
  55   }
  56 
  57  protected:
  58   enum Layout {
  59     istate_off = jf_header_words +
  60       (align_up_(sizeof(BytecodeInterpreter),
  61                  wordSize) >> LogBytesPerWord) - 1,
  62     header_words
  63   };
  64 
  65  public:
  66   static InterpreterFrame *build(Method* const method, TRAPS);
  67   static InterpreterFrame *build(int size, TRAPS);
  68 
  69  public:
  70   interpreterState interpreter_state() const {
  71     return (interpreterState) addr_of_word(istate_off);
  72   }
  73 
  74  public:
  75   void identify_word(int   frame_index,
  76                      int   offset,
  77                      char* fieldbuf,
  78                      char* valuebuf,
  79                      int   buflen) const;
  80 };
  81 #endif // CC_INTERP
  82 
  83 #endif // CPU_ZERO_VM_INTERPRETERFRAME_ZERO_HPP