aoqi@0: /*
aoqi@0:  * Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  *
aoqi@0:  */
aoqi@0: 
aoqi@0: #ifndef SHARE_VM_RUNTIME_COMPILATIONPOLICY_HPP
aoqi@0: #define SHARE_VM_RUNTIME_COMPILATIONPOLICY_HPP
aoqi@0: 
aoqi@0: #include "code/nmethod.hpp"
aoqi@0: #include "compiler/compileBroker.hpp"
aoqi@0: #include "memory/allocation.hpp"
aoqi@0: #include "runtime/vm_operations.hpp"
aoqi@0: #include "utilities/growableArray.hpp"
aoqi@0: 
aoqi@0: // The CompilationPolicy selects which method (if any) should be compiled.
aoqi@0: // It also decides which methods must always be compiled (i.e., are never
aoqi@0: // interpreted).
aoqi@0: class CompileTask;
aoqi@0: class CompileQueue;
aoqi@0: 
aoqi@0: class CompilationPolicy : public CHeapObj<mtCompiler> {
aoqi@0:   static CompilationPolicy* _policy;
aoqi@0:   // Accumulated time
aoqi@0:   static elapsedTimer       _accumulated_time;
aoqi@0: 
aoqi@0:   static bool               _in_vm_startup;
aoqi@0: public:
aoqi@0:   static  void set_in_vm_startup(bool in_vm_startup) { _in_vm_startup = in_vm_startup; }
aoqi@0:   static  void completed_vm_startup();
aoqi@0:   static  bool delay_compilation_during_startup()    { return _in_vm_startup; }
aoqi@0: 
aoqi@0:   // m must be compiled before executing it
aoqi@0:   static bool must_be_compiled(methodHandle m, int comp_level = CompLevel_all);
aoqi@0:   // m is allowed to be compiled
aoqi@0:   static bool can_be_compiled(methodHandle m, int comp_level = CompLevel_all);
aoqi@0:   // m is allowed to be osr compiled
aoqi@0:   static bool can_be_osr_compiled(methodHandle m, int comp_level = CompLevel_all);
aoqi@0:   static bool is_compilation_enabled();
aoqi@0:   static void set_policy(CompilationPolicy* policy) { _policy = policy; }
aoqi@0:   static CompilationPolicy* policy()                { return _policy; }
aoqi@0: 
aoqi@0:   // Profiling
aoqi@0:   elapsedTimer* accumulated_time() { return &_accumulated_time; }
aoqi@0:   void print_time() PRODUCT_RETURN;
aoqi@0:   // Return initial compile level that is used with Xcomp
aoqi@0:   virtual CompLevel initial_compile_level() = 0;
aoqi@0:   virtual int compiler_count(CompLevel comp_level) = 0;
aoqi@0:   // main notification entry, return a pointer to an nmethod if the OSR is required,
aoqi@0:   // returns NULL otherwise.
aoqi@0:   virtual nmethod* event(methodHandle method, methodHandle inlinee, int branch_bci, int bci, CompLevel comp_level, nmethod* nm, JavaThread* thread) = 0;
aoqi@0:   // safepoint() is called at the end of the safepoint
aoqi@0:   virtual void do_safepoint_work() = 0;
aoqi@0:   // reprofile request
aoqi@0:   virtual void reprofile(ScopeDesc* trap_scope, bool is_osr) = 0;
aoqi@0:   // delay_compilation(method) can be called by any component of the runtime to notify the policy
aoqi@0:   // that it's recommended to delay the complation of this method.
aoqi@0:   virtual void delay_compilation(Method* method) = 0;
aoqi@0:   // disable_compilation() is called whenever the runtime decides to disable compilation of the
aoqi@0:   // specified method.
aoqi@0:   virtual void disable_compilation(Method* method) = 0;
aoqi@0:   // Select task is called by CompileBroker. The queue is guaranteed to have at least one
aoqi@0:   // element and is locked. The function should select one and return it.
aoqi@0:   virtual CompileTask* select_task(CompileQueue* compile_queue) = 0;
aoqi@0:   // Tell the runtime if we think a given method is adequately profiled.
aoqi@0:   virtual bool is_mature(Method* method) = 0;
aoqi@0:   // Do policy initialization
aoqi@0:   virtual void initialize() = 0;
aoqi@0:   virtual bool should_not_inline(ciEnv* env, ciMethod* method) { return false; }
aoqi@0: };
aoqi@0: 
aoqi@0: // A base class for baseline policies.
aoqi@0: class NonTieredCompPolicy : public CompilationPolicy {
aoqi@0:   int _compiler_count;
aoqi@0: protected:
aoqi@0:   static void trace_frequency_counter_overflow(methodHandle m, int branch_bci, int bci);
aoqi@0:   static void trace_osr_request(methodHandle method, nmethod* osr, int bci);
aoqi@0:   static void trace_osr_completion(nmethod* osr_nm);
aoqi@0:   void reset_counter_for_invocation_event(methodHandle method);
aoqi@0:   void reset_counter_for_back_branch_event(methodHandle method);
aoqi@0: public:
aoqi@0:   NonTieredCompPolicy() : _compiler_count(0) { }
aoqi@0:   virtual CompLevel initial_compile_level() { return CompLevel_highest_tier; }
aoqi@0:   virtual int compiler_count(CompLevel comp_level);
aoqi@0:   virtual void do_safepoint_work();
aoqi@0:   virtual void reprofile(ScopeDesc* trap_scope, bool is_osr);
aoqi@0:   virtual void delay_compilation(Method* method);
aoqi@0:   virtual void disable_compilation(Method* method);
aoqi@0:   virtual bool is_mature(Method* method);
aoqi@0:   virtual void initialize();
aoqi@0:   virtual CompileTask* select_task(CompileQueue* compile_queue);
aoqi@0:   virtual nmethod* event(methodHandle method, methodHandle inlinee, int branch_bci, int bci, CompLevel comp_level, nmethod* nm, JavaThread* thread);
aoqi@0:   virtual void method_invocation_event(methodHandle m, JavaThread* thread) = 0;
aoqi@0:   virtual void method_back_branch_event(methodHandle m, int bci, JavaThread* thread) = 0;
aoqi@0: };
aoqi@0: 
aoqi@0: class SimpleCompPolicy : public NonTieredCompPolicy {
aoqi@0:  public:
aoqi@0:   virtual void method_invocation_event(methodHandle m, JavaThread* thread);
aoqi@0:   virtual void method_back_branch_event(methodHandle m, int bci, JavaThread* thread);
aoqi@0: };
aoqi@0: 
aoqi@0: // StackWalkCompPolicy - existing C2 policy
aoqi@0: 
aoqi@0: #ifdef COMPILER2
aoqi@0: class StackWalkCompPolicy : public NonTieredCompPolicy {
aoqi@0:  public:
aoqi@0:   virtual void method_invocation_event(methodHandle m, JavaThread* thread);
aoqi@0:   virtual void method_back_branch_event(methodHandle m, int bci, JavaThread* thread);
aoqi@0: 
aoqi@0:  private:
aoqi@0:   RFrame* findTopInlinableFrame(GrowableArray<RFrame*>* stack);
aoqi@0:   RFrame* senderOf(RFrame* rf, GrowableArray<RFrame*>* stack);
aoqi@0: 
aoqi@0:   // the following variables hold values computed by the last inlining decision
aoqi@0:   // they are used for performance debugging only (print better messages)
aoqi@0:   static const char* _msg;            // reason for not inlining
aoqi@0: 
aoqi@0:   static const char* shouldInline   (methodHandle callee, float frequency, int cnt);
aoqi@0:   // positive filter: should send be inlined?  returns NULL (--> yes) or rejection msg
aoqi@0:   static const char* shouldNotInline(methodHandle callee);
aoqi@0:   // negative filter: should send NOT be inlined?  returns NULL (--> inline) or rejection msg
aoqi@0: 
aoqi@0: };
aoqi@0: #endif
aoqi@0: 
aoqi@0: #endif // SHARE_VM_RUNTIME_COMPILATIONPOLICY_HPP