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