Mercurial > hg > truffle
annotate src/share/vm/ci/ciInstance.cpp @ 1744:f8c5d1bdaad4
6885308: The incorrect -XX:StackRedPages, -XX:StackShadowPages, -XX:StackYellowPages could cause VM crash
Summary: Test minimal stack sizes given (also fixed linux compilation error)
Reviewed-by: never, phh, coleenp
author | ptisnovs |
---|---|
date | Thu, 19 Aug 2010 14:23:59 -0400 |
parents | c18cbe5936b8 |
children | f95d63e2154a |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1999, 2005, 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 |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
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parents:
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20 * or visit www.oracle.com if you need additional information or have any |
c18cbe5936b8
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
25 #include "incls/_precompiled.incl" | |
26 #include "incls/_ciInstance.cpp.incl" | |
27 | |
28 // ciInstance | |
29 // | |
30 // This class represents an instanceOop in the HotSpot virtual | |
31 // machine. | |
32 | |
33 // ------------------------------------------------------------------ | |
34 // ciObject::java_mirror_type | |
35 ciType* ciInstance::java_mirror_type() { | |
36 VM_ENTRY_MARK; | |
37 oop m = get_oop(); | |
38 // Return NULL if it is not java.lang.Class. | |
1142 | 39 if (m == NULL || m->klass() != SystemDictionary::Class_klass()) { |
0 | 40 return NULL; |
41 } | |
42 // Return either a primitive type or a klass. | |
43 if (java_lang_Class::is_primitive(m)) { | |
44 return ciType::make(java_lang_Class::primitive_type(m)); | |
45 } else { | |
46 klassOop k = java_lang_Class::as_klassOop(m); | |
47 assert(k != NULL, ""); | |
48 return CURRENT_THREAD_ENV->get_object(k)->as_klass(); | |
49 } | |
50 } | |
51 | |
52 // ------------------------------------------------------------------ | |
53 // ciInstance::field_value | |
54 // | |
55 // Constant value of a field. | |
56 ciConstant ciInstance::field_value(ciField* field) { | |
57 assert(is_loaded() && | |
58 field->holder()->is_loaded() && | |
59 klass()->is_subclass_of(field->holder()), | |
60 "invalid access"); | |
61 VM_ENTRY_MARK; | |
62 ciConstant result; | |
63 oop obj = get_oop(); | |
64 assert(obj != NULL, "bad oop"); | |
65 BasicType field_btype = field->type()->basic_type(); | |
66 int offset = field->offset(); | |
67 | |
68 switch(field_btype) { | |
69 case T_BYTE: | |
70 return ciConstant(field_btype, obj->byte_field(offset)); | |
71 break; | |
72 case T_CHAR: | |
73 return ciConstant(field_btype, obj->char_field(offset)); | |
74 break; | |
75 case T_SHORT: | |
76 return ciConstant(field_btype, obj->short_field(offset)); | |
77 break; | |
78 case T_BOOLEAN: | |
79 return ciConstant(field_btype, obj->bool_field(offset)); | |
80 break; | |
81 case T_INT: | |
82 return ciConstant(field_btype, obj->int_field(offset)); | |
83 break; | |
84 case T_FLOAT: | |
85 return ciConstant(obj->float_field(offset)); | |
86 break; | |
87 case T_DOUBLE: | |
88 return ciConstant(obj->double_field(offset)); | |
89 break; | |
90 case T_LONG: | |
91 return ciConstant(obj->long_field(offset)); | |
92 break; | |
93 case T_OBJECT: | |
94 case T_ARRAY: | |
95 { | |
96 oop o = obj->obj_field(offset); | |
97 | |
98 // A field will be "constant" if it is known always to be | |
99 // a non-null reference to an instance of a particular class, | |
100 // or to a particular array. This can happen even if the instance | |
101 // or array is not perm. In such a case, an "unloaded" ciArray | |
102 // or ciInstance is created. The compiler may be able to use | |
103 // information about the object's class (which is exact) or length. | |
104 | |
105 if (o == NULL) { | |
106 return ciConstant(field_btype, ciNullObject::make()); | |
107 } else { | |
108 return ciConstant(field_btype, CURRENT_ENV->get_object(o)); | |
109 } | |
110 } | |
111 } | |
112 ShouldNotReachHere(); | |
113 // to shut up the compiler | |
114 return ciConstant(); | |
115 } | |
116 | |
117 // ------------------------------------------------------------------ | |
118 // ciInstance::field_value_by_offset | |
119 // | |
120 // Constant value of a field at the specified offset. | |
121 ciConstant ciInstance::field_value_by_offset(int field_offset) { | |
122 ciInstanceKlass* ik = klass()->as_instance_klass(); | |
123 ciField* field = ik->get_field_by_offset(field_offset, false); | |
124 return field_value(field); | |
125 } | |
126 | |
127 // ------------------------------------------------------------------ | |
128 // ciInstance::print_impl | |
129 // | |
130 // Implementation of the print method. | |
131 void ciInstance::print_impl(outputStream* st) { | |
132 st->print(" type="); | |
133 klass()->print(st); | |
134 } |