duke@435: /*
duke@435:  * Copyright 2000-2006 Sun Microsystems, Inc.  All Rights Reserved.
duke@435:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435:  *
duke@435:  * This code is free software; you can redistribute it and/or modify it
duke@435:  * under the terms of the GNU General Public License version 2 only, as
duke@435:  * published by the Free Software Foundation.
duke@435:  *
duke@435:  * This code is distributed in the hope that it will be useful, but WITHOUT
duke@435:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
duke@435:  * version 2 for more details (a copy is included in the LICENSE file that
duke@435:  * accompanied this code).
duke@435:  *
duke@435:  * You should have received a copy of the GNU General Public License version
duke@435:  * 2 along with this work; if not, write to the Free Software Foundation,
duke@435:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435:  *
duke@435:  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435:  * CA 95054 USA or visit www.sun.com if you need additional information or
duke@435:  * have any questions.
duke@435:  *
duke@435:  */
duke@435: 
duke@435: // The CompilationPolicy selects which method (if any) should be compiled.
duke@435: // It also decides which methods must always be compiled (i.e., are never
duke@435: // interpreted).
duke@435: 
duke@435: class CompilationPolicy : public CHeapObj {
duke@435:  private:
duke@435:   static CompilationPolicy* _policy;
duke@435:   // Accumulated time
duke@435:   static elapsedTimer       _accumulated_time;
duke@435: 
duke@435:   static bool               _in_vm_startup;
duke@435: 
duke@435:  public:
duke@435:   virtual void method_invocation_event(methodHandle m, TRAPS) = 0;
duke@435:   virtual void method_back_branch_event(methodHandle m, int branch_bci, int loop_top_bci, TRAPS) = 0;
duke@435:   virtual int compilation_level(methodHandle m, int branch_bci) = 0;
duke@435: 
duke@435:   void reset_counter_for_invocation_event(methodHandle method);
duke@435:   void reset_counter_for_back_branch_event(methodHandle method);
duke@435: 
duke@435:   static  void set_in_vm_startup(bool in_vm_startup) { _in_vm_startup = in_vm_startup; }
duke@435:   static  void completed_vm_startup();
duke@435:   static  bool delayCompilationDuringStartup() { return _in_vm_startup; }
duke@435: 
duke@435:   static bool mustBeCompiled(methodHandle m);      // m must be compiled before executing it
duke@435:   static bool canBeCompiled(methodHandle m);       // m is allowed to be compiled
duke@435: 
duke@435:   static void set_policy(CompilationPolicy* policy) { _policy = policy; }
duke@435:   static CompilationPolicy* policy() { return _policy; }
duke@435: 
duke@435:   // Profiling
duke@435:   elapsedTimer* accumulated_time() { return &_accumulated_time; }
duke@435:   void print_time() PRODUCT_RETURN;
duke@435: };
duke@435: 
duke@435: class SimpleCompPolicy : public CompilationPolicy {
duke@435:  public:
duke@435:   void method_invocation_event( methodHandle m, TRAPS);
duke@435:   void method_back_branch_event(methodHandle m, int branch_bci, int loop_top_bci, TRAPS);
duke@435:   int compilation_level(methodHandle m, int branch_bci);
duke@435: };
duke@435: 
duke@435: // StackWalkCompPolicy - existing C2 policy
duke@435: 
duke@435: #ifdef COMPILER2
duke@435: class StackWalkCompPolicy : public CompilationPolicy {
duke@435:  public:
duke@435:   void method_invocation_event(methodHandle m, TRAPS);
duke@435:   void method_back_branch_event(methodHandle m, int branch_bci, int loop_top_bci, TRAPS);
duke@435:   int compilation_level(methodHandle m, int branch_bci);
duke@435: 
duke@435:  private:
duke@435:   RFrame* findTopInlinableFrame(GrowableArray<RFrame*>* stack);
duke@435:   RFrame* senderOf(RFrame* rf, GrowableArray<RFrame*>* stack);
duke@435: 
duke@435:   // the following variables hold values computed by the last inlining decision
duke@435:   // they are used for performance debugging only (print better messages)
duke@435:   static const char* _msg;            // reason for not inlining
duke@435: 
duke@435:   static const char* shouldInline   (methodHandle callee, float frequency, int cnt);
duke@435:   // positive filter: should send be inlined?  returns NULL (--> yes) or rejection msg
duke@435:   static const char* shouldNotInline(methodHandle callee);
duke@435:   // negative filter: should send NOT be inlined?  returns NULL (--> inline) or rejection msg
duke@435: 
duke@435: };
duke@435: #endif