Sun, 10 Feb 2013 22:35:38 -0800
8006430: TraceTypeProfile is a product flag while it should be a diagnostic flag
Summary: make sure all diagnostic and experimental flag kinds are checked in Flag::is_unlocked()
Reviewed-by: kvn
1 /*
2 * Copyright (c) 2010, 2012, 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.
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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
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23 */
25 #ifndef SHARE_VM_RUNTIME_SIMPLETHRESHOLDPOLICY_HPP
26 #define SHARE_VM_RUNTIME_SIMPLETHRESHOLDPOLICY_HPP
28 #include "code/nmethod.hpp"
29 #include "oops/methodData.hpp"
30 #include "runtime/compilationPolicy.hpp"
31 #include "utilities/globalDefinitions.hpp"
33 class CompileTask;
34 class CompileQueue;
36 class SimpleThresholdPolicy : public CompilationPolicy {
37 int _c1_count, _c2_count;
39 // Check if the counter is big enough and set carry (effectively infinity).
40 inline void set_carry_if_necessary(InvocationCounter *counter);
41 // Set carry flags in the counters (in Method* and MDO).
42 inline void handle_counter_overflow(Method* method);
43 // Call and loop predicates determine whether a transition to a higher compilation
44 // level should be performed (pointers to predicate functions are passed to common_TF().
45 // Predicates also take compiler load into account.
46 typedef bool (SimpleThresholdPolicy::*Predicate)(int i, int b, CompLevel cur_level);
47 bool call_predicate(int i, int b, CompLevel cur_level);
48 bool loop_predicate(int i, int b, CompLevel cur_level);
49 // Common transition function. Given a predicate determines if a method should transition to another level.
50 CompLevel common(Predicate p, Method* method, CompLevel cur_level);
51 // Transition functions.
52 // call_event determines if a method should be compiled at a different
53 // level with a regular invocation entry.
54 CompLevel call_event(Method* method, CompLevel cur_level);
55 // loop_event checks if a method should be OSR compiled at a different
56 // level.
57 CompLevel loop_event(Method* method, CompLevel cur_level);
58 void print_counters(const char* prefix, methodHandle mh);
59 protected:
60 int c1_count() const { return _c1_count; }
61 int c2_count() const { return _c2_count; }
62 void set_c1_count(int x) { _c1_count = x; }
63 void set_c2_count(int x) { _c2_count = x; }
65 enum EventType { CALL, LOOP, COMPILE, REMOVE_FROM_QUEUE, UPDATE_IN_QUEUE, REPROFILE, MAKE_NOT_ENTRANT };
66 void print_event(EventType type, methodHandle mh, methodHandle imh, int bci, CompLevel level);
67 // Print policy-specific information if necessary
68 virtual void print_specific(EventType type, methodHandle mh, methodHandle imh, int bci, CompLevel level) { }
69 // Check if the method can be compiled, change level if necessary
70 void compile(methodHandle mh, int bci, CompLevel level, JavaThread* thread);
71 // Submit a given method for compilation
72 virtual void submit_compile(methodHandle mh, int bci, CompLevel level, JavaThread* thread);
73 // Simple methods are as good being compiled with C1 as C2.
74 // This function tells if it's such a function.
75 inline bool is_trivial(Method* method);
77 // Predicate helpers are used by .*_predicate() methods as well as others.
78 // They check the given counter values, multiplied by the scale against the thresholds.
79 template<CompLevel level> static inline bool call_predicate_helper(int i, int b, double scale);
80 template<CompLevel level> static inline bool loop_predicate_helper(int i, int b, double scale);
82 // Get a compilation level for a given method.
83 static CompLevel comp_level(Method* method) {
84 nmethod *nm = method->code();
85 if (nm != NULL && nm->is_in_use()) {
86 return (CompLevel)nm->comp_level();
87 }
88 return CompLevel_none;
89 }
90 virtual void method_invocation_event(methodHandle method, methodHandle inlinee,
91 CompLevel level, nmethod* nm, JavaThread* thread);
92 virtual void method_back_branch_event(methodHandle method, methodHandle inlinee,
93 int bci, CompLevel level, nmethod* nm, JavaThread* thread);
94 public:
95 SimpleThresholdPolicy() : _c1_count(0), _c2_count(0) { }
96 virtual int compiler_count(CompLevel comp_level) {
97 if (is_c1_compile(comp_level)) return c1_count();
98 if (is_c2_compile(comp_level)) return c2_count();
99 return 0;
100 }
101 virtual CompLevel initial_compile_level() { return MIN2((CompLevel)TieredStopAtLevel, CompLevel_initial_compile); }
102 virtual void do_safepoint_work() { }
103 virtual void delay_compilation(Method* method) { }
104 virtual void disable_compilation(Method* method) { }
105 virtual void reprofile(ScopeDesc* trap_scope, bool is_osr);
106 virtual nmethod* event(methodHandle method, methodHandle inlinee,
107 int branch_bci, int bci, CompLevel comp_level, nmethod* nm, JavaThread* thread);
108 // Select task is called by CompileBroker. We should return a task or NULL.
109 virtual CompileTask* select_task(CompileQueue* compile_queue);
110 // Tell the runtime if we think a given method is adequately profiled.
111 virtual bool is_mature(Method* method);
112 // Initialize: set compiler thread count
113 virtual void initialize();
114 virtual bool should_not_inline(ciEnv* env, ciMethod* callee) {
115 return (env->comp_level() == CompLevel_limited_profile ||
116 env->comp_level() == CompLevel_full_profile) &&
117 callee->has_loops();
118 }
119 };
121 #endif // SHARE_VM_RUNTIME_SIMPLETHRESHOLDPOLICY_HPP