1 /* 2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #ifndef SHARE_VM_RUNTIME_RFRAME_HPP 26 #define SHARE_VM_RUNTIME_RFRAME_HPP 27 28 #include "memory/allocation.hpp" 29 #include "runtime/frame.hpp" 30 31 // rframes ("recompiler frames") decorate stack frames with some extra information 32 // needed by the recompiler. The recompiler views the stack (at the time of recompilation) 33 // as a list of rframes. 34 35 class RFrame : public ResourceObj { 36 protected: 37 const frame _fr; // my frame 38 JavaThread* const _thread; // thread where frame resides. 39 RFrame* _caller; // caller / callee rframes (or NULL) 40 RFrame*const _callee; 41 const int _num; // stack frame number (0 = most recent) 42 int _invocations; // current invocation estimate (for this frame) 43 // (i.e., how often was this frame called) 44 int _distance; // recompilation search "distance" (measured in # of interpreted frames) 45 46 RFrame(frame fr, JavaThread* thread, RFrame*const callee); 47 virtual void init() = 0; // compute invocations, loopDepth, etc. 48 void print(const char* name); 49 50 public: 51 52 static RFrame* new_RFrame(frame fr, JavaThread* thread, RFrame*const callee); 53 54 virtual bool is_interpreted() const { return false; } 55 virtual bool is_compiled() const { return false; } 56 int distance() const { return _distance; } 57 void set_distance(int d); 58 int invocations() const { return _invocations; } 59 int num() const { return _num; } 60 frame fr() const { return _fr; } 61 JavaThread* thread() const { return _thread; } 62 virtual int cost() const = 0; // estimated inlining cost (size) 63 virtual Method* top_method() const = 0; 64 virtual javaVFrame* top_vframe() const = 0; 65 virtual nmethod* nm() const { ShouldNotCallThis(); return NULL; } 66 67 RFrame* caller(); 68 RFrame* callee() const { return _callee; } 69 RFrame* parent() const; // rframe containing lexical scope (if any) 70 virtual void print() = 0; 71 72 static int computeSends(Method* m); 73 static int computeSends(nmethod* nm); 74 static int computeCumulSends(Method* m); 75 static int computeCumulSends(nmethod* nm); 76 }; 77 78 class CompiledRFrame : public RFrame { // frame containing a compiled method 79 protected: 80 nmethod* _nm; 81 javaVFrame* _vf; // top vframe; may be NULL (for most recent frame) 82 Method* _method; // top method 83 84 CompiledRFrame(frame fr, JavaThread* thread, RFrame*const callee); 85 void init(); 86 friend class RFrame; 87 88 public: 89 CompiledRFrame(frame fr, JavaThread* thread); // for nmethod triggering its counter (callee == NULL) 90 bool is_compiled() const { return true; } 91 Method* top_method() const { return _method; } 92 javaVFrame* top_vframe() const { return _vf; } 93 nmethod* nm() const { return _nm; } 94 int cost() const; 95 void print(); 96 }; 97 98 class InterpretedRFrame : public RFrame { // interpreter frame 99 protected: 100 javaVFrame* _vf; // may be NULL (for most recent frame) 101 Method* _method; 102 103 InterpretedRFrame(frame fr, JavaThread* thread, RFrame*const callee); 104 void init(); 105 friend class RFrame; 106 107 public: 108 InterpretedRFrame(frame fr, JavaThread* thread, Method* m); // constructor for method triggering its invocation counter 109 bool is_interpreted() const { return true; } 110 Method* top_method() const { return _method; } 111 javaVFrame* top_vframe() const { return _vf; } 112 int cost() const; 113 void print(); 114 }; 115 116 // treat deoptimized frames as interpreted 117 class DeoptimizedRFrame : public InterpretedRFrame { 118 protected: 119 DeoptimizedRFrame(frame fr, JavaThread* thread, RFrame*const callee); 120 friend class RFrame; 121 public: 122 void print(); 123 }; 124 125 #endif // SHARE_VM_RUNTIME_RFRAME_HPP