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annotate src/share/vm/ci/ciObjArrayKlass.cpp @ 1616:38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
Reviewed-by: dcubed, kvn, twisti
author | never |
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date | Mon, 21 Jun 2010 14:26:17 -0700 |
parents | c18cbe5936b8 |
children | f95d63e2154a |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1999, 2007, Oracle and/or its affiliates. All rights reserved. |
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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 | |
25 #include "incls/_precompiled.incl" | |
26 #include "incls/_ciObjArrayKlass.cpp.incl" | |
27 | |
28 // ciObjArrayKlass | |
29 // | |
30 // This class represents a klassOop in the HotSpot virtual machine | |
31 // whose Klass part is an objArrayKlass. | |
32 | |
33 // ------------------------------------------------------------------ | |
34 // ciObjArrayKlass::ciObjArrayKlass | |
35 // | |
36 // Constructor for loaded object array klasses. | |
37 ciObjArrayKlass::ciObjArrayKlass(KlassHandle h_k) : ciArrayKlass(h_k) { | |
38 assert(get_Klass()->oop_is_objArray(), "wrong type"); | |
39 klassOop element_klassOop = get_objArrayKlass()->bottom_klass(); | |
40 _base_element_klass = CURRENT_ENV->get_object(element_klassOop)->as_klass(); | |
41 assert(_base_element_klass->is_instance_klass() || | |
42 _base_element_klass->is_type_array_klass(), "bad base klass"); | |
43 if (dimension() == 1) { | |
44 _element_klass = _base_element_klass; | |
45 } else { | |
46 _element_klass = NULL; | |
47 } | |
48 if (!ciObjectFactory::is_initialized()) { | |
49 assert(_element_klass->is_java_lang_Object(), "only arrays of object are shared"); | |
50 } | |
51 } | |
52 | |
53 // ------------------------------------------------------------------ | |
54 // ciObjArrayKlass::ciObjArrayKlass | |
55 // | |
56 // Constructor for unloaded object array klasses. | |
57 ciObjArrayKlass::ciObjArrayKlass(ciSymbol* array_name, | |
58 ciKlass* base_element_klass, | |
59 int dimension) | |
60 : ciArrayKlass(array_name, | |
61 dimension, | |
62 ciObjArrayKlassKlass::make()) { | |
63 _base_element_klass = base_element_klass; | |
64 assert(_base_element_klass->is_instance_klass() || | |
65 _base_element_klass->is_type_array_klass(), "bad base klass"); | |
66 if (dimension == 1) { | |
67 _element_klass = base_element_klass; | |
68 } else { | |
69 _element_klass = NULL; | |
70 } | |
71 } | |
72 | |
73 // ------------------------------------------------------------------ | |
74 // ciObjArrayKlass::element_klass | |
75 // | |
76 // What is the one-level element type of this array? | |
77 ciKlass* ciObjArrayKlass::element_klass() { | |
78 if (_element_klass == NULL) { | |
79 assert(dimension() > 1, "_element_klass should not be NULL"); | |
80 // Produce the element klass. | |
81 if (is_loaded()) { | |
82 VM_ENTRY_MARK; | |
83 klassOop element_klassOop = get_objArrayKlass()->element_klass(); | |
84 _element_klass = CURRENT_THREAD_ENV->get_object(element_klassOop)->as_klass(); | |
85 } else { | |
86 VM_ENTRY_MARK; | |
87 // We are an unloaded array klass. Attempt to fetch our | |
88 // element klass by name. | |
89 _element_klass = CURRENT_THREAD_ENV->get_klass_by_name_impl( | |
90 this, | |
91 construct_array_name(base_element_klass()->name(), | |
92 dimension() - 1), | |
93 false); | |
94 } | |
95 } | |
96 return _element_klass; | |
97 } | |
98 | |
99 // ------------------------------------------------------------------ | |
100 // ciObjArrayKlass::construct_array_name | |
101 // | |
102 // Build an array name from an element name and a dimension. | |
103 ciSymbol* ciObjArrayKlass::construct_array_name(ciSymbol* element_name, | |
104 int dimension) { | |
105 EXCEPTION_CONTEXT; | |
106 int element_len = element_name->utf8_length(); | |
107 | |
108 symbolOop base_name_sym = element_name->get_symbolOop(); | |
109 char* name; | |
110 | |
111 if (base_name_sym->byte_at(0) == '[' || | |
112 (base_name_sym->byte_at(0) == 'L' && // watch package name 'Lxx' | |
113 base_name_sym->byte_at(element_len-1) == ';')) { | |
114 | |
115 int new_len = element_len + dimension + 1; // for the ['s and '\0' | |
116 name = CURRENT_THREAD_ENV->name_buffer(new_len); | |
117 | |
118 int pos = 0; | |
119 for ( ; pos < dimension; pos++) { | |
120 name[pos] = '['; | |
121 } | |
122 strncpy(name+pos, (char*)element_name->base(), element_len); | |
123 name[new_len-1] = '\0'; | |
124 } else { | |
125 int new_len = 3 // for L, ;, and '\0' | |
126 + dimension // for ['s | |
127 + element_len; | |
128 | |
129 name = CURRENT_THREAD_ENV->name_buffer(new_len); | |
130 int pos = 0; | |
131 for ( ; pos < dimension; pos++) { | |
132 name[pos] = '['; | |
133 } | |
134 name[pos++] = 'L'; | |
135 strncpy(name+pos, (char*)element_name->base(), element_len); | |
136 name[new_len-2] = ';'; | |
137 name[new_len-1] = '\0'; | |
138 } | |
139 return ciSymbol::make(name); | |
140 } | |
141 | |
142 // ------------------------------------------------------------------ | |
143 // ciObjArrayKlass::make_impl | |
144 // | |
145 // Implementation of make. | |
146 ciObjArrayKlass* ciObjArrayKlass::make_impl(ciKlass* element_klass) { | |
147 | |
148 if (element_klass->is_loaded()) { | |
149 EXCEPTION_CONTEXT; | |
150 // The element klass is loaded | |
151 klassOop array = element_klass->get_Klass()->array_klass(THREAD); | |
152 if (HAS_PENDING_EXCEPTION) { | |
153 CLEAR_PENDING_EXCEPTION; | |
154 CURRENT_THREAD_ENV->record_out_of_memory_failure(); | |
155 return ciEnv::unloaded_ciobjarrayklass(); | |
156 } | |
157 return CURRENT_THREAD_ENV->get_object(array)->as_obj_array_klass(); | |
158 } | |
159 | |
160 // The array klass was unable to be made or the element klass was | |
161 // not loaded. | |
162 ciSymbol* array_name = construct_array_name(element_klass->name(), 1); | |
163 if (array_name == ciEnv::unloaded_cisymbol()) { | |
164 return ciEnv::unloaded_ciobjarrayklass(); | |
165 } | |
166 return | |
167 CURRENT_ENV->get_unloaded_klass(element_klass, array_name) | |
168 ->as_obj_array_klass(); | |
169 } | |
170 | |
171 // ------------------------------------------------------------------ | |
172 // ciObjArrayKlass::make | |
173 // | |
174 // Make an array klass corresponding to the specified primitive type. | |
175 ciObjArrayKlass* ciObjArrayKlass::make(ciKlass* element_klass) { | |
176 assert(element_klass->is_java_klass(), "wrong kind of klass"); | |
177 GUARDED_VM_ENTRY(return make_impl(element_klass);) | |
178 } |