|
1 /* |
|
2 * Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved. |
|
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
|
4 * |
|
5 * This code is free software; you can redistribute it and/or modify it |
|
6 * under the terms of the GNU General Public License version 2 only, as |
|
7 * published by the Free Software Foundation. |
|
8 * |
|
9 * This code is distributed in the hope that it will be useful, but WITHOUT |
|
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
|
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
|
12 * version 2 for more details (a copy is included in the LICENSE file that |
|
13 * accompanied this code). |
|
14 * |
|
15 * You should have received a copy of the GNU General Public License version |
|
16 * 2 along with this work; if not, write to the Free Software Foundation, |
|
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
|
18 * |
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
|
20 * or visit www.oracle.com if you need additional information or have any |
|
21 * questions. |
|
22 * |
|
23 */ |
|
24 |
|
25 #ifndef SHARE_VM_RUNTIME_COMPILATIONPOLICY_HPP |
|
26 #define SHARE_VM_RUNTIME_COMPILATIONPOLICY_HPP |
|
27 |
|
28 #include "code/nmethod.hpp" |
|
29 #include "compiler/compileBroker.hpp" |
|
30 #include "memory/allocation.hpp" |
|
31 #include "runtime/vm_operations.hpp" |
|
32 #include "utilities/growableArray.hpp" |
|
33 |
|
34 // The CompilationPolicy selects which method (if any) should be compiled. |
|
35 // It also decides which methods must always be compiled (i.e., are never |
|
36 // interpreted). |
|
37 class CompileTask; |
|
38 class CompileQueue; |
|
39 |
|
40 class CompilationPolicy : public CHeapObj<mtCompiler> { |
|
41 static CompilationPolicy* _policy; |
|
42 // Accumulated time |
|
43 static elapsedTimer _accumulated_time; |
|
44 |
|
45 static bool _in_vm_startup; |
|
46 public: |
|
47 static void set_in_vm_startup(bool in_vm_startup) { _in_vm_startup = in_vm_startup; } |
|
48 static void completed_vm_startup(); |
|
49 static bool delay_compilation_during_startup() { return _in_vm_startup; } |
|
50 |
|
51 // m must be compiled before executing it |
|
52 static bool must_be_compiled(methodHandle m, int comp_level = CompLevel_all); |
|
53 // m is allowed to be compiled |
|
54 static bool can_be_compiled(methodHandle m, int comp_level = CompLevel_all); |
|
55 // m is allowed to be osr compiled |
|
56 static bool can_be_osr_compiled(methodHandle m, int comp_level = CompLevel_all); |
|
57 static bool is_compilation_enabled(); |
|
58 static void set_policy(CompilationPolicy* policy) { _policy = policy; } |
|
59 static CompilationPolicy* policy() { return _policy; } |
|
60 |
|
61 // Profiling |
|
62 elapsedTimer* accumulated_time() { return &_accumulated_time; } |
|
63 void print_time() PRODUCT_RETURN; |
|
64 // Return initial compile level that is used with Xcomp |
|
65 virtual CompLevel initial_compile_level() = 0; |
|
66 virtual int compiler_count(CompLevel comp_level) = 0; |
|
67 // main notification entry, return a pointer to an nmethod if the OSR is required, |
|
68 // returns NULL otherwise. |
|
69 virtual nmethod* event(methodHandle method, methodHandle inlinee, int branch_bci, int bci, CompLevel comp_level, nmethod* nm, JavaThread* thread) = 0; |
|
70 // safepoint() is called at the end of the safepoint |
|
71 virtual void do_safepoint_work() = 0; |
|
72 // reprofile request |
|
73 virtual void reprofile(ScopeDesc* trap_scope, bool is_osr) = 0; |
|
74 // delay_compilation(method) can be called by any component of the runtime to notify the policy |
|
75 // that it's recommended to delay the complation of this method. |
|
76 virtual void delay_compilation(Method* method) = 0; |
|
77 // disable_compilation() is called whenever the runtime decides to disable compilation of the |
|
78 // specified method. |
|
79 virtual void disable_compilation(Method* method) = 0; |
|
80 // Select task is called by CompileBroker. The queue is guaranteed to have at least one |
|
81 // element and is locked. The function should select one and return it. |
|
82 virtual CompileTask* select_task(CompileQueue* compile_queue) = 0; |
|
83 // Tell the runtime if we think a given method is adequately profiled. |
|
84 virtual bool is_mature(Method* method) = 0; |
|
85 // Do policy initialization |
|
86 virtual void initialize() = 0; |
|
87 virtual bool should_not_inline(ciEnv* env, ciMethod* method) { return false; } |
|
88 }; |
|
89 |
|
90 // A base class for baseline policies. |
|
91 class NonTieredCompPolicy : public CompilationPolicy { |
|
92 int _compiler_count; |
|
93 protected: |
|
94 static void trace_frequency_counter_overflow(methodHandle m, int branch_bci, int bci); |
|
95 static void trace_osr_request(methodHandle method, nmethod* osr, int bci); |
|
96 static void trace_osr_completion(nmethod* osr_nm); |
|
97 void reset_counter_for_invocation_event(methodHandle method); |
|
98 void reset_counter_for_back_branch_event(methodHandle method); |
|
99 public: |
|
100 NonTieredCompPolicy() : _compiler_count(0) { } |
|
101 virtual CompLevel initial_compile_level() { return CompLevel_highest_tier; } |
|
102 virtual int compiler_count(CompLevel comp_level); |
|
103 virtual void do_safepoint_work(); |
|
104 virtual void reprofile(ScopeDesc* trap_scope, bool is_osr); |
|
105 virtual void delay_compilation(Method* method); |
|
106 virtual void disable_compilation(Method* method); |
|
107 virtual bool is_mature(Method* method); |
|
108 virtual void initialize(); |
|
109 virtual CompileTask* select_task(CompileQueue* compile_queue); |
|
110 virtual nmethod* event(methodHandle method, methodHandle inlinee, int branch_bci, int bci, CompLevel comp_level, nmethod* nm, JavaThread* thread); |
|
111 virtual void method_invocation_event(methodHandle m, JavaThread* thread) = 0; |
|
112 virtual void method_back_branch_event(methodHandle m, int bci, JavaThread* thread) = 0; |
|
113 }; |
|
114 |
|
115 class SimpleCompPolicy : public NonTieredCompPolicy { |
|
116 public: |
|
117 virtual void method_invocation_event(methodHandle m, JavaThread* thread); |
|
118 virtual void method_back_branch_event(methodHandle m, int bci, JavaThread* thread); |
|
119 }; |
|
120 |
|
121 // StackWalkCompPolicy - existing C2 policy |
|
122 |
|
123 #ifdef COMPILER2 |
|
124 class StackWalkCompPolicy : public NonTieredCompPolicy { |
|
125 public: |
|
126 virtual void method_invocation_event(methodHandle m, JavaThread* thread); |
|
127 virtual void method_back_branch_event(methodHandle m, int bci, JavaThread* thread); |
|
128 |
|
129 private: |
|
130 RFrame* findTopInlinableFrame(GrowableArray<RFrame*>* stack); |
|
131 RFrame* senderOf(RFrame* rf, GrowableArray<RFrame*>* stack); |
|
132 |
|
133 // the following variables hold values computed by the last inlining decision |
|
134 // they are used for performance debugging only (print better messages) |
|
135 static const char* _msg; // reason for not inlining |
|
136 |
|
137 static const char* shouldInline (methodHandle callee, float frequency, int cnt); |
|
138 // positive filter: should send be inlined? returns NULL (--> yes) or rejection msg |
|
139 static const char* shouldNotInline(methodHandle callee); |
|
140 // negative filter: should send NOT be inlined? returns NULL (--> inline) or rejection msg |
|
141 |
|
142 }; |
|
143 #endif |
|
144 |
|
145 #endif // SHARE_VM_RUNTIME_COMPILATIONPOLICY_HPP |