Mercurial > hg > graal-compiler
view src/share/vm/runtime/compilationPolicy.hpp @ 12350:ab68fc0101ce
8025855: Simplify GenRemSet code slightly
Summary: Remove a few redundant switch-statements
Reviewed-by: jcoomes, tschatzl
author | jwilhelm |
---|---|
date | Thu, 03 Oct 2013 13:19:19 +0200 |
parents | f99558245e5c |
children | cefad50507d8 de6a9e811145 |
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/* * Copyright (c) 2000, 2012, 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