aoqi@0: /*
aoqi@0:  * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  *
aoqi@0:  */
aoqi@0: 
aoqi@0: #ifndef SHARE_VM_RUNTIME_RFRAME_HPP
aoqi@0: #define SHARE_VM_RUNTIME_RFRAME_HPP
aoqi@0: 
aoqi@0: #include "memory/allocation.hpp"
aoqi@0: #include "runtime/frame.inline.hpp"
aoqi@0: 
aoqi@0: // rframes ("recompiler frames") decorate stack frames with some extra information
aoqi@0: // needed by the recompiler.  The recompiler views the stack (at the time of recompilation)
aoqi@0: // as a list of rframes.
aoqi@0: 
aoqi@0: class RFrame : public ResourceObj {
aoqi@0:  protected:
aoqi@0:   const frame _fr;                  // my frame
aoqi@0:   JavaThread* const _thread;        // thread where frame resides.
aoqi@0:   RFrame* _caller;                  // caller / callee rframes (or NULL)
aoqi@0:   RFrame*const _callee;
aoqi@0:   const int _num;                   // stack frame number (0 = most recent)
aoqi@0:   int _invocations;                 // current invocation estimate (for this frame)
aoqi@0:                                     // (i.e., how often was this frame called)
aoqi@0:   int _distance;                    // recompilation search "distance" (measured in # of interpreted frames)
aoqi@0: 
aoqi@0:   RFrame(frame fr, JavaThread* thread, RFrame*const callee);
aoqi@0:   virtual void init() = 0;          // compute invocations, loopDepth, etc.
aoqi@0:   void print(const char* name);
aoqi@0: 
aoqi@0:  public:
aoqi@0: 
aoqi@0:   static RFrame* new_RFrame(frame fr, JavaThread* thread, RFrame*const callee);
aoqi@0: 
aoqi@0:   virtual bool is_interpreted() const     { return false; }
aoqi@0:   virtual bool is_compiled() const        { return false; }
aoqi@0:   int distance() const                    { return _distance; }
aoqi@0:   void set_distance(int d);
aoqi@0:   int invocations() const                 { return _invocations; }
aoqi@0:   int num() const                         { return _num; }
aoqi@0:   frame fr() const                        { return _fr; }
aoqi@0:   JavaThread* thread() const              { return _thread; }
aoqi@0:   virtual int cost() const = 0;           // estimated inlining cost (size)
aoqi@0:   virtual methodHandle top_method() const  = 0;
aoqi@0:   virtual javaVFrame* top_vframe() const = 0;
aoqi@0:   virtual nmethod* nm() const             { ShouldNotCallThis(); return NULL; }
aoqi@0: 
aoqi@0:   RFrame* caller();
aoqi@0:   RFrame* callee() const                  { return _callee; }
aoqi@0:   RFrame* parent() const;                 // rframe containing lexical scope (if any)
aoqi@0:   virtual void print()                    = 0;
aoqi@0: 
aoqi@0:   static int computeSends(Method* m);
aoqi@0:   static int computeSends(nmethod* nm);
aoqi@0:   static int computeCumulSends(Method* m);
aoqi@0:   static int computeCumulSends(nmethod* nm);
aoqi@0: };
aoqi@0: 
aoqi@0: class CompiledRFrame : public RFrame {    // frame containing a compiled method
aoqi@0:  protected:
aoqi@0:   nmethod*    _nm;
aoqi@0:   javaVFrame* _vf;                        // top vframe; may be NULL (for most recent frame)
aoqi@0:   methodHandle _method;                   // top method
aoqi@0: 
aoqi@0:   CompiledRFrame(frame fr, JavaThread* thread, RFrame*const  callee);
aoqi@0:   void init();
aoqi@0:   friend class RFrame;
aoqi@0: 
aoqi@0:  public:
aoqi@0:   CompiledRFrame(frame fr, JavaThread* thread); // for nmethod triggering its counter (callee == NULL)
aoqi@0:   bool is_compiled() const                 { return true; }
aoqi@0:   methodHandle top_method() const          { return _method; }
aoqi@0:   javaVFrame* top_vframe() const           { return _vf; }
aoqi@0:   nmethod* nm() const                      { return _nm; }
aoqi@0:   int cost() const;
aoqi@0:   void print();
aoqi@0: };
aoqi@0: 
aoqi@0: class InterpretedRFrame : public RFrame {    // interpreter frame
aoqi@0:  protected:
aoqi@0:   javaVFrame* _vf;                           // may be NULL (for most recent frame)
aoqi@0:   methodHandle   _method;
aoqi@0: 
aoqi@0:   InterpretedRFrame(frame fr, JavaThread* thread, RFrame*const  callee);
aoqi@0:   void init();
aoqi@0:   friend class RFrame;
aoqi@0: 
aoqi@0:  public:
aoqi@0:   InterpretedRFrame(frame fr, JavaThread* thread, methodHandle m); // constructor for method triggering its invocation counter
aoqi@0:   bool is_interpreted() const                { return true; }
aoqi@0:   methodHandle top_method() const            { return _method; }
aoqi@0:   javaVFrame* top_vframe() const             { return _vf; }
aoqi@0:   int cost() const;
aoqi@0:   void print();
aoqi@0: };
aoqi@0: 
aoqi@0: // treat deoptimized frames as interpreted
aoqi@0: class DeoptimizedRFrame : public InterpretedRFrame {
aoqi@0:  protected:
aoqi@0:   DeoptimizedRFrame(frame fr, JavaThread* thread, RFrame*const  callee);
aoqi@0:   friend class RFrame;
aoqi@0:  public:
aoqi@0:   void print();
aoqi@0: };
aoqi@0: 
aoqi@0: #endif // SHARE_VM_RUNTIME_RFRAME_HPP