Tue, 15 Mar 2011 06:35:10 -0700
7024234: 2/3 jvmti tests fail assert(!_oops_are_stale) failed: oops are stale on Win-AMD64
Summary: Move initialization of the '_instance' field to avoid race with ServiceThread start.
Reviewed-by: dholmes, kamg, never, dsamersoff, ysr, coleenp, acorn
1 /*
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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
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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
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23 */
25 #ifndef SHARE_VM_RUNTIME_COMPILATIONPOLICY_HPP
26 #define SHARE_VM_RUNTIME_COMPILATIONPOLICY_HPP
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"
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;
40 class CompilationPolicy : public CHeapObj {
41 static CompilationPolicy* _policy;
42 // Accumulated time
43 static elapsedTimer _accumulated_time;
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; }
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 static bool is_compilation_enabled();
56 static void set_policy(CompilationPolicy* policy) { _policy = policy; }
57 static CompilationPolicy* policy() { return _policy; }
59 // Profiling
60 elapsedTimer* accumulated_time() { return &_accumulated_time; }
61 void print_time() PRODUCT_RETURN;
62 virtual int compiler_count(CompLevel comp_level) = 0;
63 // main notification entry, return a pointer to an nmethod if the OSR is required,
64 // returns NULL otherwise.
65 virtual nmethod* event(methodHandle method, methodHandle inlinee, int branch_bci, int bci, CompLevel comp_level, TRAPS) = 0;
66 // safepoint() is called at the end of the safepoint
67 virtual void do_safepoint_work() = 0;
68 // reprofile request
69 virtual void reprofile(ScopeDesc* trap_scope, bool is_osr) = 0;
70 // delay_compilation(method) can be called by any component of the runtime to notify the policy
71 // that it's recommended to delay the complation of this method.
72 virtual void delay_compilation(methodOop method) = 0;
73 // disable_compilation() is called whenever the runtime decides to disable compilation of the
74 // specified method.
75 virtual void disable_compilation(methodOop method) = 0;
76 // Select task is called by CompileBroker. The queue is guaranteed to have at least one
77 // element and is locked. The function should select one and return it.
78 virtual CompileTask* select_task(CompileQueue* compile_queue) = 0;
79 // Tell the runtime if we think a given method is adequately profiled.
80 virtual bool is_mature(methodOop method) = 0;
81 // Do policy initialization
82 virtual void initialize() = 0;
83 };
85 // A base class for baseline policies.
86 class NonTieredCompPolicy : public CompilationPolicy {
87 int _compiler_count;
88 protected:
89 static void trace_frequency_counter_overflow(methodHandle m, int branch_bci, int bci);
90 static void trace_osr_request(methodHandle method, nmethod* osr, int bci);
91 static void trace_osr_completion(nmethod* osr_nm);
92 void reset_counter_for_invocation_event(methodHandle method);
93 void reset_counter_for_back_branch_event(methodHandle method);
94 public:
95 NonTieredCompPolicy() : _compiler_count(0) { }
96 virtual int compiler_count(CompLevel comp_level);
97 virtual void do_safepoint_work();
98 virtual void reprofile(ScopeDesc* trap_scope, bool is_osr);
99 virtual void delay_compilation(methodOop method);
100 virtual void disable_compilation(methodOop method);
101 virtual bool is_mature(methodOop method);
102 virtual void initialize();
103 virtual CompileTask* select_task(CompileQueue* compile_queue);
104 virtual nmethod* event(methodHandle method, methodHandle inlinee, int branch_bci, int bci, CompLevel comp_level, TRAPS);
105 virtual void method_invocation_event(methodHandle m, TRAPS) = 0;
106 virtual void method_back_branch_event(methodHandle m, int bci, TRAPS) = 0;
107 };
109 class SimpleCompPolicy : public NonTieredCompPolicy {
110 public:
111 virtual void method_invocation_event(methodHandle m, TRAPS);
112 virtual void method_back_branch_event(methodHandle m, int bci, TRAPS);
113 };
115 // StackWalkCompPolicy - existing C2 policy
117 #ifdef COMPILER2
118 class StackWalkCompPolicy : public NonTieredCompPolicy {
119 public:
120 virtual void method_invocation_event(methodHandle m, TRAPS);
121 virtual void method_back_branch_event(methodHandle m, int bci, TRAPS);
123 private:
124 RFrame* findTopInlinableFrame(GrowableArray<RFrame*>* stack);
125 RFrame* senderOf(RFrame* rf, GrowableArray<RFrame*>* stack);
127 // the following variables hold values computed by the last inlining decision
128 // they are used for performance debugging only (print better messages)
129 static const char* _msg; // reason for not inlining
131 static const char* shouldInline (methodHandle callee, float frequency, int cnt);
132 // positive filter: should send be inlined? returns NULL (--> yes) or rejection msg
133 static const char* shouldNotInline(methodHandle callee);
134 // negative filter: should send NOT be inlined? returns NULL (--> inline) or rejection msg
136 };
137 #endif
139 #endif // SHARE_VM_RUNTIME_COMPILATIONPOLICY_HPP