duke@435: /*
duke@435:  * Copyright 1997-2000 Sun Microsystems, Inc.  All Rights Reserved.
duke@435:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435:  *
duke@435:  * This code is free software; you can redistribute it and/or modify it
duke@435:  * under the terms of the GNU General Public License version 2 only, as
duke@435:  * published by the Free Software Foundation.
duke@435:  *
duke@435:  * This code is distributed in the hope that it will be useful, but WITHOUT
duke@435:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
duke@435:  * version 2 for more details (a copy is included in the LICENSE file that
duke@435:  * accompanied this code).
duke@435:  *
duke@435:  * You should have received a copy of the GNU General Public License version
duke@435:  * 2 along with this work; if not, write to the Free Software Foundation,
duke@435:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435:  *
duke@435:  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435:  * CA 95054 USA or visit www.sun.com if you need additional information or
duke@435:  * have any questions.
duke@435:  *
duke@435:  */
duke@435: 
duke@435: // rframes ("recompiler frames") decorate stack frames with some extra information
duke@435: // needed by the recompiler.  The recompiler views the stack (at the time of recompilation)
duke@435: // as a list of rframes.
duke@435: 
duke@435: class RFrame : public ResourceObj {
duke@435:  protected:
duke@435:   const frame _fr;                  // my frame
duke@435:   JavaThread* const _thread;        // thread where frame resides.
duke@435:   RFrame* _caller;                  // caller / callee rframes (or NULL)
duke@435:   RFrame*const _callee;
duke@435:   const int _num;                   // stack frame number (0 = most recent)
duke@435:   int _invocations;                 // current invocation estimate (for this frame)
duke@435:                                     // (i.e., how often was this frame called)
duke@435:   int _distance;                    // recompilation search "distance" (measured in # of interpreted frames)
duke@435: 
duke@435:   RFrame(frame fr, JavaThread* thread, RFrame*const callee);
duke@435:   virtual void init() = 0;          // compute invocations, loopDepth, etc.
duke@435:   void print(const char* name);
duke@435: 
duke@435:  public:
duke@435: 
duke@435:   static RFrame* new_RFrame(frame fr, JavaThread* thread, RFrame*const callee);
duke@435: 
duke@435:   virtual bool is_interpreted() const     { return false; }
duke@435:   virtual bool is_compiled() const        { return false; }
duke@435:   int distance() const                    { return _distance; }
duke@435:   void set_distance(int d);
duke@435:   int invocations() const                 { return _invocations; }
duke@435:   int num() const                         { return _num; }
duke@435:   frame fr() const                        { return _fr; }
duke@435:   JavaThread* thread() const              { return _thread; }
duke@435:   virtual int cost() const = 0;           // estimated inlining cost (size)
duke@435:   virtual methodHandle top_method() const  = 0;
duke@435:   virtual javaVFrame* top_vframe() const = 0;
duke@435:   virtual nmethod* nm() const             { ShouldNotCallThis(); return NULL; }
duke@435: 
duke@435:   RFrame* caller();
duke@435:   RFrame* callee() const                  { return _callee; }
duke@435:   RFrame* parent() const;                 // rframe containing lexical scope (if any)
duke@435:   virtual void print()                    = 0;
duke@435: 
duke@435:   static int computeSends(methodOop m);
duke@435:   static int computeSends(nmethod* nm);
duke@435:   static int computeCumulSends(methodOop m);
duke@435:   static int computeCumulSends(nmethod* nm);
duke@435: };
duke@435: 
duke@435: class CompiledRFrame : public RFrame {    // frame containing a compiled method
duke@435:  protected:
duke@435:   nmethod*    _nm;
duke@435:   javaVFrame* _vf;                        // top vframe; may be NULL (for most recent frame)
duke@435:   methodHandle _method;                   // top method
duke@435: 
duke@435:   CompiledRFrame(frame fr, JavaThread* thread, RFrame*const  callee);
duke@435:   void init();
duke@435:   friend class RFrame;
duke@435: 
duke@435:  public:
duke@435:   CompiledRFrame(frame fr, JavaThread* thread); // for nmethod triggering its counter (callee == NULL)
duke@435:   bool is_compiled() const                 { return true; }
duke@435:   methodHandle top_method() const          { return _method; }
duke@435:   javaVFrame* top_vframe() const           { return _vf; }
duke@435:   nmethod* nm() const                      { return _nm; }
duke@435:   int cost() const;
duke@435:   void print();
duke@435: };
duke@435: 
duke@435: class InterpretedRFrame : public RFrame {    // interpreter frame
duke@435:  protected:
duke@435:   javaVFrame* _vf;                           // may be NULL (for most recent frame)
duke@435:   methodHandle   _method;
duke@435: 
duke@435:   InterpretedRFrame(frame fr, JavaThread* thread, RFrame*const  callee);
duke@435:   void init();
duke@435:   friend class RFrame;
duke@435: 
duke@435:  public:
duke@435:   InterpretedRFrame(frame fr, JavaThread* thread, methodHandle m); // constructor for method triggering its invocation counter
duke@435:   bool is_interpreted() const                { return true; }
duke@435:   methodHandle top_method() const            { return _method; }
duke@435:   javaVFrame* top_vframe() const             { return _vf; }
duke@435:   int cost() const;
duke@435:   void print();
duke@435: };
duke@435: 
duke@435: // treat deoptimized frames as interpreted
duke@435: class DeoptimizedRFrame : public InterpretedRFrame {
duke@435:  protected:
duke@435:   DeoptimizedRFrame(frame fr, JavaThread* thread, RFrame*const  callee);
duke@435:   friend class RFrame;
duke@435:  public:
duke@435:   void print();
duke@435: };