1 /*
   2  * Copyright 2003-2007 Sun Microsystems, Inc.  All Rights Reserved.
   3  * Copyright 2008 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  */
  25 
  26 #ifdef CC_INTERP
  27 // |  ...               |
  28 // +--------------------+  ------------------
  29 // | stack slot n-1     |       low addresses
  30 // |  ...               |
  31 // | stack slot 0       |
  32 // | monitor 0 (maybe)  |
  33 // |  ...               |
  34 // | interpreter state  |
  35 // |  ...               |
  36 // | frame_type         |
  37 // | next_frame         |      high addresses
  38 // +--------------------+  ------------------
  39 // |  ...               |
  40 
  41 class InterpreterFrame : public ZeroFrame {
  42   friend class AbstractInterpreter;
  43 
  44  private:
  45   InterpreterFrame() : ZeroFrame() {
  46     ShouldNotCallThis();
  47   }
  48 
  49  protected:
  50   enum Layout {
  51     istate_off = jf_header_words +
  52       (align_size_up_(sizeof(BytecodeInterpreter),
  53                       wordSize) >> LogBytesPerWord) - 1,
  54     header_words
  55   };
  56 
  57  public:
  58   static InterpreterFrame *build(ZeroStack*      stack,
  59                                  const methodOop method,
  60                                  JavaThread*     thread);
  61   static InterpreterFrame *build(ZeroStack* stack, int size);
  62 
  63  public:
  64   interpreterState interpreter_state() const {
  65     return (interpreterState) addr_of_word(istate_off);
  66   }
  67 
  68  public:
  69   void identify_word(int   frame_index,
  70                      int   offset,
  71                      char* fieldbuf,
  72                      char* valuebuf,
  73                      int   buflen) const;
  74 };
  75 #endif // CC_INTERP