--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/share/vm/runtime/compilationPolicy.hpp	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,90 @@
+/*
+ * Copyright 2000-2006 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.
+ *
+ */
+
+// The CompilationPolicy selects which method (if any) should be compiled.
+// It also decides which methods must always be compiled (i.e., are never
+// interpreted).
+
+class CompilationPolicy : public CHeapObj {
+ private:
+  static CompilationPolicy* _policy;
+  // Accumulated time
+  static elapsedTimer       _accumulated_time;
+
+  static bool               _in_vm_startup;
+
+ public:
+  virtual void method_invocation_event(methodHandle m, TRAPS) = 0;
+  virtual void method_back_branch_event(methodHandle m, int branch_bci, int loop_top_bci, TRAPS) = 0;
+  virtual int compilation_level(methodHandle m, int branch_bci) = 0;
+
+  void reset_counter_for_invocation_event(methodHandle method);
+  void reset_counter_for_back_branch_event(methodHandle method);
+
+  static  void set_in_vm_startup(bool in_vm_startup) { _in_vm_startup = in_vm_startup; }
+  static  void completed_vm_startup();
+  static  bool delayCompilationDuringStartup() { return _in_vm_startup; }
+
+  static bool mustBeCompiled(methodHandle m);      // m must be compiled before executing it
+  static bool canBeCompiled(methodHandle m);       // m is allowed to be compiled
+
+  static void set_policy(CompilationPolicy* policy) { _policy = policy; }
+  static CompilationPolicy* policy() { return _policy; }
+
+  // Profiling
+  elapsedTimer* accumulated_time() { return &_accumulated_time; }
+  void print_time() PRODUCT_RETURN;
+};
+
+class SimpleCompPolicy : public CompilationPolicy {
+ public:
+  void method_invocation_event( methodHandle m, TRAPS);
+  void method_back_branch_event(methodHandle m, int branch_bci, int loop_top_bci, TRAPS);
+  int compilation_level(methodHandle m, int branch_bci);
+};
+
+// StackWalkCompPolicy - existing C2 policy
+
+#ifdef COMPILER2
+class StackWalkCompPolicy : public CompilationPolicy {
+ public:
+  void method_invocation_event(methodHandle m, TRAPS);
+  void method_back_branch_event(methodHandle m, int branch_bci, int loop_top_bci, TRAPS);
+  int compilation_level(methodHandle m, int branch_bci);
+
+ private:
+  RFrame* findTopInlinableFrame(GrowableArray<RFrame*>* stack);
+  RFrame* senderOf(RFrame* rf, GrowableArray<RFrame*>* stack);
+
+  // the following variables hold values computed by the last inlining decision
+  // they are used for performance debugging only (print better messages)
+  static const char* _msg;            // reason for not inlining
+
+  static const char* shouldInline   (methodHandle callee, float frequency, int cnt);
+  // positive filter: should send be inlined?  returns NULL (--> yes) or rejection msg
+  static const char* shouldNotInline(methodHandle callee);
+  // negative filter: should send NOT be inlined?  returns NULL (--> inline) or rejection msg
+
+};
+#endif