Mercurial > hg > truffle
annotate src/share/vm/ci/ciType.cpp @ 9126:bc26f978b0ce
HotSpotResolvedObjectType: implement hasFinalizeSubclass() correctly
don't use the (wrong) cached value, but ask the runtime on each request.
Fixes regression on xml.* benchmarks @ specjvm2008. The problem was:
After the constructor of Object was deoptimized due to an assumption violation,
it was recompiled again after some time. However, on recompilation, the value
of hasFinalizeSubclass for the class was not updated and it was compiled again
with a, now wrong, assumption, which then triggers deoptimization again.
This was repeated until it hit the recompilation limit (defined by
PerMethodRecompilationCutoff), and therefore only executed by the interpreter
from now on, causing the performance regression.
author | Bernhard Urban <bernhard.urban@jku.at> |
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date | Mon, 15 Apr 2013 19:54:58 +0200 |
parents | f1de9dbc914e |
children | de6a9e811145 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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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. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
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26 #include "ci/ciEnv.hpp" |
1972 | 27 #include "ci/ciType.hpp" |
28 #include "ci/ciUtilities.hpp" | |
29 #include "classfile/systemDictionary.hpp" | |
30 #include "oops/oop.inline.hpp" | |
0 | 31 |
32 ciType* ciType::_basic_types[T_CONFLICT+1]; | |
33 | |
34 // ciType | |
35 // | |
36 // This class represents either a class (T_OBJECT), array (T_ARRAY), | |
37 // or one of the primitive types such as T_INT. | |
38 | |
39 // ------------------------------------------------------------------ | |
40 // ciType::ciType | |
41 // | |
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42 ciType::ciType(BasicType basic_type) : ciMetadata() { |
0 | 43 assert(basic_type >= T_BOOLEAN && basic_type <= T_CONFLICT, "range check"); |
44 _basic_type = basic_type; | |
45 } | |
46 | |
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47 ciType::ciType(KlassHandle k) : ciMetadata(k()) { |
6983 | 48 _basic_type = k()->oop_is_array() ? T_ARRAY : T_OBJECT; |
0 | 49 } |
50 | |
51 | |
52 // ------------------------------------------------------------------ | |
53 // ciType::is_subtype_of | |
54 // | |
55 bool ciType::is_subtype_of(ciType* type) { | |
56 if (this == type) return true; | |
57 if (is_klass() && type->is_klass()) | |
58 return this->as_klass()->is_subtype_of(type->as_klass()); | |
59 return false; | |
60 } | |
61 | |
62 // ------------------------------------------------------------------ | |
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63 // ciType::name |
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64 // |
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65 // Return the name of this type |
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66 const char* ciType::name() { |
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67 if (is_primitive_type()) { |
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68 return type2name(basic_type()); |
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69 } else { |
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70 assert(is_klass(), "must be"); |
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71 return as_klass()->name()->as_utf8(); |
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72 } |
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73 } |
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74 |
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75 // ------------------------------------------------------------------ |
0 | 76 // ciType::print_impl |
77 // | |
78 // Implementation of the print method. | |
79 void ciType::print_impl(outputStream* st) { | |
80 st->print(" type="); | |
81 print_name_on(st); | |
82 } | |
83 | |
84 // ------------------------------------------------------------------ | |
85 // ciType::print_name | |
86 // | |
87 // Print the name of this type | |
88 void ciType::print_name_on(outputStream* st) { | |
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89 ResourceMark rm; |
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90 st->print(name()); |
0 | 91 } |
92 | |
93 | |
94 | |
95 // ------------------------------------------------------------------ | |
96 // ciType::java_mirror | |
97 // | |
98 ciInstance* ciType::java_mirror() { | |
99 VM_ENTRY_MARK; | |
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100 return CURRENT_THREAD_ENV->get_instance(Universe::java_mirror(basic_type())); |
0 | 101 } |
102 | |
103 // ------------------------------------------------------------------ | |
104 // ciType::box_klass | |
105 // | |
106 ciKlass* ciType::box_klass() { | |
107 if (!is_primitive_type()) return this->as_klass(); // reference types are "self boxing" | |
108 | |
109 // Void is "boxed" with a null. | |
110 if (basic_type() == T_VOID) return NULL; | |
111 | |
112 VM_ENTRY_MARK; | |
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113 return CURRENT_THREAD_ENV->get_instance_klass(SystemDictionary::box_klass(basic_type())); |
0 | 114 } |
115 | |
116 | |
117 // ------------------------------------------------------------------ | |
118 // ciType::make | |
119 // | |
120 // Produce the ciType for a given primitive BasicType. | |
121 // As a bonus, produce the right reference type for T_OBJECT. | |
122 // Does not work on T_ARRAY. | |
123 ciType* ciType::make(BasicType t) { | |
124 // short, etc. | |
125 // Note: Bare T_ADDRESS means a raw pointer type, not a return_address. | |
126 assert((uint)t < T_CONFLICT+1, "range check"); | |
1142 | 127 if (t == T_OBJECT) return ciEnv::_Object_klass; // java/lang/Object |
0 | 128 assert(_basic_types[t] != NULL, "domain check"); |
129 return _basic_types[t]; | |
130 } | |
131 | |
132 // ciReturnAddress | |
133 // | |
134 // This class represents the type of a specific return address in the | |
135 // bytecodes. | |
136 | |
137 // ------------------------------------------------------------------ | |
138 // ciReturnAddress::ciReturnAddress | |
139 // | |
140 ciReturnAddress::ciReturnAddress(int bci) : ciType(T_ADDRESS) { | |
141 assert(0 <= bci, "bci cannot be negative"); | |
142 _bci = bci; | |
143 } | |
144 | |
145 // ------------------------------------------------------------------ | |
146 // ciReturnAddress::print_impl | |
147 // | |
148 // Implementation of the print method. | |
149 void ciReturnAddress::print_impl(outputStream* st) { | |
150 st->print(" bci=%d", _bci); | |
151 } | |
152 | |
153 // ------------------------------------------------------------------ | |
154 // ciReturnAddress::make | |
155 ciReturnAddress* ciReturnAddress::make(int bci) { | |
156 GUARDED_VM_ENTRY(return CURRENT_ENV->get_return_address(bci);) | |
157 } |