--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/share/vm/runtime/rframe.hpp Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,117 @@
+/*
+ * Copyright 1997-2000 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+// 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(methodOop m);
+ static int computeSends(nmethod* nm);
+ static int computeCumulSends(methodOop 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();
+};