1 /* 2 * Copyright (c) 1997, 2000, 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 // rframes ("recompiler frames") decorate stack frames with some extra information 26 // needed by the recompiler. The recompiler views the stack (at the time of recompilation) 27 // as a list of rframes. 28 29 class RFrame : public ResourceObj { 30 protected: 31 const frame _fr; // my frame 32 JavaThread* const _thread; // thread where frame resides. 33 RFrame* _caller; // caller / callee rframes (or NULL) 34 RFrame*const _callee; 35 const int _num; // stack frame number (0 = most recent) 36 int _invocations; // current invocation estimate (for this frame) 37 // (i.e., how often was this frame called) 38 int _distance; // recompilation search "distance" (measured in # of interpreted frames) 39 40 RFrame(frame fr, JavaThread* thread, RFrame*const callee); 41 virtual void init() = 0; // compute invocations, loopDepth, etc. 42 void print(const char* name); 43 44 public: 45 46 static RFrame* new_RFrame(frame fr, JavaThread* thread, RFrame*const callee); 47 48 virtual bool is_interpreted() const { return false; } 49 virtual bool is_compiled() const { return false; } 50 int distance() const { return _distance; } 51 void set_distance(int d); 52 int invocations() const { return _invocations; } 53 int num() const { return _num; } 54 frame fr() const { return _fr; } 55 JavaThread* thread() const { return _thread; } 56 virtual int cost() const = 0; // estimated inlining cost (size) 57 virtual methodHandle top_method() const = 0; 58 virtual javaVFrame* top_vframe() const = 0; 59 virtual nmethod* nm() const { ShouldNotCallThis(); return NULL; } 60 61 RFrame* caller(); 62 RFrame* callee() const { return _callee; } 63 RFrame* parent() const; // rframe containing lexical scope (if any) 64 virtual void print() = 0; 65 66 static int computeSends(methodOop m); 67 static int computeSends(nmethod* nm); 68 static int computeCumulSends(methodOop m); 69 static int computeCumulSends(nmethod* nm); 70 }; 71 72 class CompiledRFrame : public RFrame { // frame containing a compiled method 73 protected: 74 nmethod* _nm; 75 javaVFrame* _vf; // top vframe; may be NULL (for most recent frame) 76 methodHandle _method; // top method 77 78 CompiledRFrame(frame fr, JavaThread* thread, RFrame*const callee); 79 void init(); 80 friend class RFrame; 81 82 public: 83 CompiledRFrame(frame fr, JavaThread* thread); // for nmethod triggering its counter (callee == NULL) 84 bool is_compiled() const { return true; } 85 methodHandle top_method() const { return _method; } 86 javaVFrame* top_vframe() const { return _vf; } 87 nmethod* nm() const { return _nm; } 88 int cost() const; 89 void print(); 90 }; 91 92 class InterpretedRFrame : public RFrame { // interpreter frame 93 protected: 94 javaVFrame* _vf; // may be NULL (for most recent frame) 95 methodHandle _method; 96 97 InterpretedRFrame(frame fr, JavaThread* thread, RFrame*const callee); 98 void init(); 99 friend class RFrame; 100 101 public: 102 InterpretedRFrame(frame fr, JavaThread* thread, methodHandle m); // constructor for method triggering its invocation counter 103 bool is_interpreted() const { return true; } 104 methodHandle top_method() const { return _method; } 105 javaVFrame* top_vframe() const { return _vf; } 106 int cost() const; 107 void print(); 108 }; 109 110 // treat deoptimized frames as interpreted 111 class DeoptimizedRFrame : public InterpretedRFrame { 112 protected: 113 DeoptimizedRFrame(frame fr, JavaThread* thread, RFrame*const callee); 114 friend class RFrame; 115 public: 116 void print(); 117 };