1 /* |
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2 * Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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18 * |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 * |
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23 */ |
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24 |
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25 #ifndef SHARE_RUNTIME_COMPILATIONPOLICY_HPP |
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26 #define SHARE_RUNTIME_COMPILATIONPOLICY_HPP |
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27 |
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28 #include "code/nmethod.hpp" |
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29 #include "compiler/compileBroker.hpp" |
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30 #include "memory/allocation.hpp" |
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31 #include "runtime/vmOperations.hpp" |
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32 #include "utilities/growableArray.hpp" |
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33 |
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34 // The CompilationPolicy selects which method (if any) should be compiled. |
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35 // It also decides which methods must always be compiled (i.e., are never |
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36 // interpreted). |
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37 class CompileTask; |
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38 class CompileQueue; |
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39 |
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40 class CompilationPolicy : public CHeapObj<mtCompiler> { |
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41 static CompilationPolicy* _policy; |
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42 |
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43 // m must be compiled before executing it |
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44 static bool must_be_compiled(const methodHandle& m, int comp_level = CompLevel_all); |
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45 |
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46 public: |
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47 // If m must_be_compiled then request a compilation from the CompileBroker. |
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48 // This supports the -Xcomp option. |
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49 static void compile_if_required(const methodHandle& m, TRAPS); |
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50 |
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51 // m is allowed to be compiled |
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52 static bool can_be_compiled(const methodHandle& m, int comp_level = CompLevel_all); |
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53 // m is allowed to be osr compiled |
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54 static bool can_be_osr_compiled(const methodHandle& m, int comp_level = CompLevel_all); |
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55 static bool is_compilation_enabled(); |
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56 static void set_policy(CompilationPolicy* policy) { _policy = policy; } |
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57 static CompilationPolicy* policy() { return _policy; } |
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58 |
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59 static CompileTask* select_task_helper(CompileQueue* compile_queue); |
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60 |
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61 // Return initial compile level that is used with Xcomp |
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62 virtual CompLevel initial_compile_level() = 0; |
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63 virtual int compiler_count(CompLevel comp_level) = 0; |
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64 // main notification entry, return a pointer to an nmethod if the OSR is required, |
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65 // returns NULL otherwise. |
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66 virtual nmethod* event(const methodHandle& method, const methodHandle& inlinee, int branch_bci, int bci, CompLevel comp_level, CompiledMethod* nm, JavaThread* thread) = 0; |
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67 // safepoint() is called at the end of the safepoint |
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68 virtual void do_safepoint_work() = 0; |
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69 // reprofile request |
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70 virtual void reprofile(ScopeDesc* trap_scope, bool is_osr) = 0; |
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71 // delay_compilation(method) can be called by any component of the runtime to notify the policy |
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72 // that it's recommended to delay the compilation of this method. |
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73 virtual void delay_compilation(Method* method) = 0; |
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74 // disable_compilation() is called whenever the runtime decides to disable compilation of the |
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75 // specified method. |
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76 virtual void disable_compilation(Method* method) = 0; |
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77 // Select task is called by CompileBroker. The queue is guaranteed to have at least one |
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78 // element and is locked. The function should select one and return it. |
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79 virtual CompileTask* select_task(CompileQueue* compile_queue) = 0; |
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80 // Tell the runtime if we think a given method is adequately profiled. |
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81 virtual bool is_mature(Method* method) = 0; |
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82 // Do policy initialization |
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83 virtual void initialize() = 0; |
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84 virtual bool should_not_inline(ciEnv* env, ciMethod* method) { return false; } |
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85 }; |
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86 |
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87 // A simple compilation policy. |
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88 class SimpleCompPolicy : public CompilationPolicy { |
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89 int _compiler_count; |
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90 private: |
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91 static void trace_frequency_counter_overflow(const methodHandle& m, int branch_bci, int bci); |
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92 static void trace_osr_request(const methodHandle& method, nmethod* osr, int bci); |
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93 static void trace_osr_completion(nmethod* osr_nm); |
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94 void reset_counter_for_invocation_event(const methodHandle& method); |
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95 void reset_counter_for_back_branch_event(const methodHandle& method); |
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96 void method_invocation_event(const methodHandle& m, JavaThread* thread); |
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97 void method_back_branch_event(const methodHandle& m, int bci, JavaThread* thread); |
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98 public: |
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99 SimpleCompPolicy() : _compiler_count(0) { } |
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100 virtual CompLevel initial_compile_level() { return CompLevel_highest_tier; } |
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101 virtual int compiler_count(CompLevel comp_level); |
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102 virtual void do_safepoint_work(); |
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103 virtual void reprofile(ScopeDesc* trap_scope, bool is_osr); |
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104 virtual void delay_compilation(Method* method); |
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105 virtual void disable_compilation(Method* method); |
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106 virtual bool is_mature(Method* method); |
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107 virtual void initialize(); |
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108 virtual CompileTask* select_task(CompileQueue* compile_queue); |
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109 virtual nmethod* event(const methodHandle& method, const methodHandle& inlinee, int branch_bci, int bci, CompLevel comp_level, CompiledMethod* nm, JavaThread* thread); |
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110 }; |
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111 |
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112 |
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113 #endif // SHARE_RUNTIME_COMPILATIONPOLICY_HPP |
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