Mercurial > hg > truffle
annotate src/share/vm/ci/ciInstance.cpp @ 14518:d8041d695d19
Merged with jdk9/dev/hotspot changeset 3812c088b945
| author | twisti |
|---|---|
| date | Tue, 11 Mar 2014 18:45:59 -0700 |
| parents | de6a9e811145 |
| children | 4ca6dc0799b6 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1999, 2013, 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" |
| 26 #include "ci/ciConstant.hpp" | |
| 27 #include "ci/ciField.hpp" | |
| 28 #include "ci/ciInstance.hpp" | |
| 29 #include "ci/ciInstanceKlass.hpp" | |
| 30 #include "ci/ciUtilities.hpp" | |
| 31 #include "classfile/systemDictionary.hpp" | |
| 32 #include "oops/oop.inline.hpp" | |
| 0 | 33 |
| 34 // ciInstance | |
| 35 // | |
| 36 // This class represents an instanceOop in the HotSpot virtual | |
| 37 // machine. | |
| 38 | |
| 39 // ------------------------------------------------------------------ | |
| 40 // ciObject::java_mirror_type | |
| 41 ciType* ciInstance::java_mirror_type() { | |
| 42 VM_ENTRY_MARK; | |
| 43 oop m = get_oop(); | |
| 44 // Return NULL if it is not java.lang.Class. | |
| 1142 | 45 if (m == NULL || m->klass() != SystemDictionary::Class_klass()) { |
| 0 | 46 return NULL; |
| 47 } | |
| 48 // Return either a primitive type or a klass. | |
| 49 if (java_lang_Class::is_primitive(m)) { | |
| 50 return ciType::make(java_lang_Class::primitive_type(m)); | |
| 51 } else { | |
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52 Klass* k = java_lang_Class::as_Klass(m); |
| 0 | 53 assert(k != NULL, ""); |
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54 return CURRENT_THREAD_ENV->get_klass(k); |
| 0 | 55 } |
| 56 } | |
| 57 | |
| 58 // ------------------------------------------------------------------ | |
| 59 // ciInstance::field_value | |
| 60 // | |
| 61 // Constant value of a field. | |
| 62 ciConstant ciInstance::field_value(ciField* field) { | |
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63 assert(is_loaded(), "invalid access - must be loaded"); |
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64 assert(field->holder()->is_loaded(), "invalid access - holder must be loaded"); |
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65 assert(klass()->is_subclass_of(field->holder()), "invalid access - must be subclass"); |
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66 |
| 0 | 67 VM_ENTRY_MARK; |
| 68 ciConstant result; | |
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69 Handle obj = get_oop(); |
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70 assert(!obj.is_null(), "bad oop"); |
| 0 | 71 BasicType field_btype = field->type()->basic_type(); |
| 72 int offset = field->offset(); | |
| 73 | |
| 74 switch(field_btype) { | |
| 75 case T_BYTE: | |
| 76 return ciConstant(field_btype, obj->byte_field(offset)); | |
| 77 break; | |
| 78 case T_CHAR: | |
| 79 return ciConstant(field_btype, obj->char_field(offset)); | |
| 80 break; | |
| 81 case T_SHORT: | |
| 82 return ciConstant(field_btype, obj->short_field(offset)); | |
| 83 break; | |
| 84 case T_BOOLEAN: | |
| 85 return ciConstant(field_btype, obj->bool_field(offset)); | |
| 86 break; | |
| 87 case T_INT: | |
| 88 return ciConstant(field_btype, obj->int_field(offset)); | |
| 89 break; | |
| 90 case T_FLOAT: | |
| 91 return ciConstant(obj->float_field(offset)); | |
| 92 break; | |
| 93 case T_DOUBLE: | |
| 94 return ciConstant(obj->double_field(offset)); | |
| 95 break; | |
| 96 case T_LONG: | |
| 97 return ciConstant(obj->long_field(offset)); | |
| 98 break; | |
| 99 case T_OBJECT: | |
| 100 case T_ARRAY: | |
| 101 { | |
| 102 oop o = obj->obj_field(offset); | |
| 103 | |
| 104 // A field will be "constant" if it is known always to be | |
| 105 // a non-null reference to an instance of a particular class, | |
| 106 // or to a particular array. This can happen even if the instance | |
| 107 // or array is not perm. In such a case, an "unloaded" ciArray | |
| 108 // or ciInstance is created. The compiler may be able to use | |
| 109 // information about the object's class (which is exact) or length. | |
| 110 | |
| 111 if (o == NULL) { | |
| 112 return ciConstant(field_btype, ciNullObject::make()); | |
| 113 } else { | |
| 114 return ciConstant(field_btype, CURRENT_ENV->get_object(o)); | |
| 115 } | |
| 116 } | |
| 117 } | |
| 118 ShouldNotReachHere(); | |
| 119 // to shut up the compiler | |
| 120 return ciConstant(); | |
| 121 } | |
| 122 | |
| 123 // ------------------------------------------------------------------ | |
| 124 // ciInstance::field_value_by_offset | |
| 125 // | |
| 126 // Constant value of a field at the specified offset. | |
| 127 ciConstant ciInstance::field_value_by_offset(int field_offset) { | |
| 128 ciInstanceKlass* ik = klass()->as_instance_klass(); | |
| 129 ciField* field = ik->get_field_by_offset(field_offset, false); | |
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130 if (field == NULL) |
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131 return ciConstant(); // T_ILLEGAL |
| 0 | 132 return field_value(field); |
| 133 } | |
| 134 | |
| 135 // ------------------------------------------------------------------ | |
| 136 // ciInstance::print_impl | |
| 137 // | |
| 138 // Implementation of the print method. | |
| 139 void ciInstance::print_impl(outputStream* st) { | |
| 140 st->print(" type="); | |
| 141 klass()->print(st); | |
| 142 } | |
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143 |
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144 |
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145 ciKlass* ciInstance::java_lang_Class_klass() { |
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146 VM_ENTRY_MARK; |
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147 return CURRENT_ENV->get_metadata(java_lang_Class::as_Klass(get_oop()))->as_klass(); |
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148 } |