| /* |
| * Copyright (c) 2000, 2013, 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_COMPILATIONPOLICY_HPP |
| #define SHARE_VM_RUNTIME_COMPILATIONPOLICY_HPP |
| |
| #include "code/nmethod.hpp" |
| #include "compiler/compileBroker.hpp" |
| #include "memory/allocation.hpp" |
| #include "runtime/vm_operations.hpp" |
| #include "utilities/growableArray.hpp" |
| |
| // 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 CompileTask; |
| class CompileQueue; |
| |
| class CompilationPolicy : public CHeapObj<mtCompiler> { |
| static CompilationPolicy* _policy; |
| // Accumulated time |
| static elapsedTimer _accumulated_time; |
| |
| static bool _in_vm_startup; |
| public: |
| static void set_in_vm_startup(bool in_vm_startup) { _in_vm_startup = in_vm_startup; } |
| static void completed_vm_startup(); |
| static bool delay_compilation_during_startup() { return _in_vm_startup; } |
| |
| // m must be compiled before executing it |
| static bool must_be_compiled(methodHandle m, int comp_level = CompLevel_all); |
| // m is allowed to be compiled |
| static bool can_be_compiled(methodHandle m, int comp_level = CompLevel_all); |
| // m is allowed to be osr compiled |
| static bool can_be_osr_compiled(methodHandle m, int comp_level = CompLevel_all); |
| static bool is_compilation_enabled(); |
| 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; |
| // Return initial compile level that is used with Xcomp |
| virtual CompLevel initial_compile_level() = 0; |
| virtual int compiler_count(CompLevel comp_level) = 0; |
| // main notification entry, return a pointer to an nmethod if the OSR is required, |
| // returns NULL otherwise. |
| virtual nmethod* event(methodHandle method, methodHandle inlinee, int branch_bci, int bci, CompLevel comp_level, nmethod* nm, JavaThread* thread) = 0; |
| // safepoint() is called at the end of the safepoint |
| virtual void do_safepoint_work() = 0; |
| // reprofile request |
| virtual void reprofile(ScopeDesc* trap_scope, bool is_osr) = 0; |
| // delay_compilation(method) can be called by any component of the runtime to notify the policy |
| // that it's recommended to delay the complation of this method. |
| virtual void delay_compilation(Method* method) = 0; |
| // disable_compilation() is called whenever the runtime decides to disable compilation of the |
| // specified method. |
| virtual void disable_compilation(Method* method) = 0; |
| // Select task is called by CompileBroker. The queue is guaranteed to have at least one |
| // element and is locked. The function should select one and return it. |
| virtual CompileTask* select_task(CompileQueue* compile_queue) = 0; |
| // Tell the runtime if we think a given method is adequately profiled. |
| virtual bool is_mature(Method* method) = 0; |
| // Do policy initialization |
| virtual void initialize() = 0; |
| virtual bool should_not_inline(ciEnv* env, ciMethod* method) { return false; } |
| }; |
| |
| // A base class for baseline policies. |
| class NonTieredCompPolicy : public CompilationPolicy { |
| int _compiler_count; |
| protected: |
| static void trace_frequency_counter_overflow(methodHandle m, int branch_bci, int bci); |
| static void trace_osr_request(methodHandle method, nmethod* osr, int bci); |
| static void trace_osr_completion(nmethod* osr_nm); |
| void reset_counter_for_invocation_event(methodHandle method); |
| void reset_counter_for_back_branch_event(methodHandle method); |
| public: |
| NonTieredCompPolicy() : _compiler_count(0) { } |
| virtual CompLevel initial_compile_level() { return CompLevel_highest_tier; } |
| virtual int compiler_count(CompLevel comp_level); |
| virtual void do_safepoint_work(); |
| virtual void reprofile(ScopeDesc* trap_scope, bool is_osr); |
| virtual void delay_compilation(Method* method); |
| virtual void disable_compilation(Method* method); |
| virtual bool is_mature(Method* method); |
| virtual void initialize(); |
| virtual CompileTask* select_task(CompileQueue* compile_queue); |
| virtual nmethod* event(methodHandle method, methodHandle inlinee, int branch_bci, int bci, CompLevel comp_level, nmethod* nm, JavaThread* thread); |
| virtual void method_invocation_event(methodHandle m, JavaThread* thread) = 0; |
| virtual void method_back_branch_event(methodHandle m, int bci, JavaThread* thread) = 0; |
| }; |
| |
| class SimpleCompPolicy : public NonTieredCompPolicy { |
| public: |
| virtual void method_invocation_event(methodHandle m, JavaThread* thread); |
| virtual void method_back_branch_event(methodHandle m, int bci, JavaThread* thread); |
| }; |
| |
| // StackWalkCompPolicy - existing C2 policy |
| |
| #ifdef COMPILER2 |
| class StackWalkCompPolicy : public NonTieredCompPolicy { |
| public: |
| virtual void method_invocation_event(methodHandle m, JavaThread* thread); |
| virtual void method_back_branch_event(methodHandle m, int bci, JavaThread* thread); |
| |
| 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 |
| |
| #endif // SHARE_VM_RUNTIME_COMPILATIONPOLICY_HPP |