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annotate src/share/vm/ci/ciSignature.cpp @ 13018:fc1632f5021a
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author | iveresov |
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date | Mon, 28 Oct 2013 17:32:02 -0700 |
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0 | 1 /* |
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2 * Copyright (c) 1999, 2011, 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/ciMethodType.hpp" |
1972 | 27 #include "ci/ciSignature.hpp" |
28 #include "ci/ciUtilities.hpp" | |
29 #include "memory/allocation.inline.hpp" | |
30 #include "oops/oop.inline.hpp" | |
31 #include "runtime/signature.hpp" | |
0 | 32 |
33 // ciSignature | |
34 // | |
35 // This class represents the signature of a method. | |
36 | |
37 // ------------------------------------------------------------------ | |
38 // ciSignature::ciSignature | |
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39 ciSignature::ciSignature(ciKlass* accessing_klass, constantPoolHandle cpool, ciSymbol* symbol) { |
0 | 40 ASSERT_IN_VM; |
41 EXCEPTION_CONTEXT; | |
42 _accessing_klass = accessing_klass; | |
43 _symbol = symbol; | |
44 | |
45 ciEnv* env = CURRENT_ENV; | |
46 Arena* arena = env->arena(); | |
47 _types = new (arena) GrowableArray<ciType*>(arena, 8, 0, NULL); | |
48 | |
49 int size = 0; | |
50 int count = 0; | |
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51 ResourceMark rm(THREAD); |
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52 Symbol* sh = symbol->get_symbol(); |
0 | 53 SignatureStream ss(sh); |
54 for (; ; ss.next()) { | |
55 // Process one element of the signature | |
56 ciType* type; | |
57 if (!ss.is_object()) { | |
58 type = ciType::make(ss.type()); | |
59 } else { | |
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60 Symbol* name = ss.as_symbol(THREAD); |
0 | 61 if (HAS_PENDING_EXCEPTION) { |
62 type = ss.is_array() ? (ciType*)ciEnv::unloaded_ciobjarrayklass() | |
63 : (ciType*)ciEnv::unloaded_ciinstance_klass(); | |
64 env->record_out_of_memory_failure(); | |
65 CLEAR_PENDING_EXCEPTION; | |
66 } else { | |
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67 ciSymbol* klass_name = env->get_symbol(name); |
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68 type = env->get_klass_by_name_impl(_accessing_klass, cpool, klass_name, false); |
0 | 69 } |
70 } | |
71 _types->append(type); | |
72 if (ss.at_return_type()) { | |
73 // Done processing the return type; do not add it into the count. | |
74 break; | |
75 } | |
76 size += type->size(); | |
77 count++; | |
78 } | |
79 _size = size; | |
80 _count = count; | |
81 } | |
82 | |
83 // ------------------------------------------------------------------ | |
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84 // ciSignature::ciSignature |
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85 ciSignature::ciSignature(ciKlass* accessing_klass, ciSymbol* symbol, ciMethodType* method_type) : |
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86 _symbol(symbol), |
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87 _accessing_klass(accessing_klass), |
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88 _size( method_type->ptype_slot_count()), |
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89 _count(method_type->ptype_count()) |
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90 { |
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91 ASSERT_IN_VM; |
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92 EXCEPTION_CONTEXT; |
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93 Arena* arena = CURRENT_ENV->arena(); |
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94 _types = new (arena) GrowableArray<ciType*>(arena, _count + 1, 0, NULL); |
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95 for (int i = 0; i < _count; i++) { |
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96 _types->append(method_type->ptype_at(i)); |
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97 } |
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98 _types->append(method_type->rtype()); |
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99 } |
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100 |
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101 // ------------------------------------------------------------------ |
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102 // ciSignature::return_type |
0 | 103 // |
104 // What is the return type of this signature? | |
105 ciType* ciSignature::return_type() const { | |
106 return _types->at(_count); | |
107 } | |
108 | |
109 // ------------------------------------------------------------------ | |
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110 // ciSignature::type_at |
0 | 111 // |
112 // What is the type of the index'th element of this | |
113 // signature? | |
114 ciType* ciSignature::type_at(int index) const { | |
115 assert(index < _count, "out of bounds"); | |
116 // The first _klasses element holds the return klass. | |
117 return _types->at(index); | |
118 } | |
119 | |
120 // ------------------------------------------------------------------ | |
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121 // ciSignature::equals |
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122 // |
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123 // Compare this signature to another one. Signatures with different |
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124 // accessing classes but with signature-types resolved to the same |
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125 // types are defined to be equal. |
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126 bool ciSignature::equals(ciSignature* that) { |
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127 // Compare signature |
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128 if (!this->as_symbol()->equals(that->as_symbol())) return false; |
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129 // Compare all types of the arguments |
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130 for (int i = 0; i < _count; i++) { |
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131 if (this->type_at(i) != that->type_at(i)) return false; |
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132 } |
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133 // Compare the return type |
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134 if (this->return_type() != that->return_type()) return false; |
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135 return true; |
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136 } |
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137 |
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138 // ------------------------------------------------------------------ |
0 | 139 // ciSignature::print_signature |
140 void ciSignature::print_signature() { | |
141 _symbol->print_symbol(); | |
142 } | |
143 | |
144 // ------------------------------------------------------------------ | |
145 // ciSignature::print | |
146 void ciSignature::print() { | |
147 tty->print("<ciSignature symbol="); | |
148 print_signature(); | |
149 tty->print(" accessing_klass="); | |
150 _accessing_klass->print(); | |
151 tty->print(" address=0x%x>", (address)this); | |
152 } |