Mercurial > hg > graal-jvmci-8
annotate src/share/vm/oops/instanceKlass.cpp @ 7154:5d0bb7d52783
changes to support Graal co-existing with the other HotSpot compiler(s) and being used for explicit compilation requests and code installation via the Graal API
author | Doug Simon <doug.simon@oracle.com> |
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date | Wed, 12 Dec 2012 21:36:40 +0100 |
parents | 2cb439954abf |
children | 291ffc492eb6 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 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" |
26 #include "classfile/javaClasses.hpp" | |
27 #include "classfile/systemDictionary.hpp" | |
28 #include "classfile/verifier.hpp" | |
29 #include "classfile/vmSymbols.hpp" | |
30 #include "compiler/compileBroker.hpp" | |
31 #include "gc_implementation/shared/markSweep.inline.hpp" | |
32 #include "gc_interface/collectedHeap.inline.hpp" | |
33 #include "interpreter/oopMapCache.hpp" | |
34 #include "interpreter/rewriter.hpp" | |
35 #include "jvmtifiles/jvmti.h" | |
36 #include "memory/genOopClosures.inline.hpp" | |
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37 #include "memory/metadataFactory.hpp" |
1972 | 38 #include "memory/oopFactory.hpp" |
3938 | 39 #include "oops/fieldStreams.hpp" |
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40 #include "oops/instanceClassLoaderKlass.hpp" |
1972 | 41 #include "oops/instanceKlass.hpp" |
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42 #include "oops/instanceMirrorKlass.hpp" |
1972 | 43 #include "oops/instanceOop.hpp" |
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44 #include "oops/klass.inline.hpp" |
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45 #include "oops/method.hpp" |
1972 | 46 #include "oops/oop.inline.hpp" |
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47 #include "oops/symbol.hpp" |
1972 | 48 #include "prims/jvmtiExport.hpp" |
49 #include "prims/jvmtiRedefineClassesTrace.hpp" | |
50 #include "runtime/fieldDescriptor.hpp" | |
51 #include "runtime/handles.inline.hpp" | |
52 #include "runtime/javaCalls.hpp" | |
53 #include "runtime/mutexLocker.hpp" | |
54 #include "services/threadService.hpp" | |
55 #include "utilities/dtrace.hpp" | |
56 #ifdef TARGET_OS_FAMILY_linux | |
57 # include "thread_linux.inline.hpp" | |
58 #endif | |
59 #ifdef TARGET_OS_FAMILY_solaris | |
60 # include "thread_solaris.inline.hpp" | |
61 #endif | |
62 #ifdef TARGET_OS_FAMILY_windows | |
63 # include "thread_windows.inline.hpp" | |
64 #endif | |
3960 | 65 #ifdef TARGET_OS_FAMILY_bsd |
66 # include "thread_bsd.inline.hpp" | |
67 #endif | |
1972 | 68 #ifndef SERIALGC |
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69 #include "gc_implementation/concurrentMarkSweep/cmsOopClosures.inline.hpp" |
1972 | 70 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" |
71 #include "gc_implementation/g1/g1OopClosures.inline.hpp" | |
72 #include "gc_implementation/g1/g1RemSet.inline.hpp" | |
73 #include "gc_implementation/g1/heapRegionSeq.inline.hpp" | |
74 #include "gc_implementation/parNew/parOopClosures.inline.hpp" | |
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75 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.inline.hpp" |
1972 | 76 #include "gc_implementation/parallelScavenge/psPromotionManager.inline.hpp" |
77 #include "gc_implementation/parallelScavenge/psScavenge.inline.hpp" | |
78 #include "oops/oop.pcgc.inline.hpp" | |
79 #endif | |
80 #ifdef COMPILER1 | |
81 #include "c1/c1_Compiler.hpp" | |
82 #endif | |
0 | 83 |
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84 #ifdef DTRACE_ENABLED |
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85 |
4006 | 86 #ifndef USDT2 |
87 | |
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88 HS_DTRACE_PROBE_DECL4(hotspot, class__initialization__required, |
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89 char*, intptr_t, oop, intptr_t); |
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90 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__recursive, |
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91 char*, intptr_t, oop, intptr_t, int); |
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92 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__concurrent, |
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93 char*, intptr_t, oop, intptr_t, int); |
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94 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__erroneous, |
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95 char*, intptr_t, oop, intptr_t, int); |
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96 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__super__failed, |
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97 char*, intptr_t, oop, intptr_t, int); |
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98 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__clinit, |
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99 char*, intptr_t, oop, intptr_t, int); |
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100 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__error, |
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101 char*, intptr_t, oop, intptr_t, int); |
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102 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__end, |
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103 char*, intptr_t, oop, intptr_t, int); |
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104 |
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105 #define DTRACE_CLASSINIT_PROBE(type, clss, thread_type) \ |
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106 { \ |
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107 char* data = NULL; \ |
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108 int len = 0; \ |
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109 Symbol* name = (clss)->name(); \ |
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110 if (name != NULL) { \ |
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111 data = (char*)name->bytes(); \ |
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112 len = name->utf8_length(); \ |
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113 } \ |
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114 HS_DTRACE_PROBE4(hotspot, class__initialization__##type, \ |
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115 data, len, (clss)->class_loader(), thread_type); \ |
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116 } |
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117 |
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118 #define DTRACE_CLASSINIT_PROBE_WAIT(type, clss, thread_type, wait) \ |
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119 { \ |
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120 char* data = NULL; \ |
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121 int len = 0; \ |
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122 Symbol* name = (clss)->name(); \ |
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123 if (name != NULL) { \ |
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124 data = (char*)name->bytes(); \ |
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125 len = name->utf8_length(); \ |
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126 } \ |
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127 HS_DTRACE_PROBE5(hotspot, class__initialization__##type, \ |
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128 data, len, (clss)->class_loader(), thread_type, wait); \ |
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129 } |
4006 | 130 #else /* USDT2 */ |
131 | |
132 #define HOTSPOT_CLASS_INITIALIZATION_required HOTSPOT_CLASS_INITIALIZATION_REQUIRED | |
133 #define HOTSPOT_CLASS_INITIALIZATION_recursive HOTSPOT_CLASS_INITIALIZATION_RECURSIVE | |
134 #define HOTSPOT_CLASS_INITIALIZATION_concurrent HOTSPOT_CLASS_INITIALIZATION_CONCURRENT | |
135 #define HOTSPOT_CLASS_INITIALIZATION_erroneous HOTSPOT_CLASS_INITIALIZATION_ERRONEOUS | |
136 #define HOTSPOT_CLASS_INITIALIZATION_super__failed HOTSPOT_CLASS_INITIALIZATION_SUPER_FAILED | |
137 #define HOTSPOT_CLASS_INITIALIZATION_clinit HOTSPOT_CLASS_INITIALIZATION_CLINIT | |
138 #define HOTSPOT_CLASS_INITIALIZATION_error HOTSPOT_CLASS_INITIALIZATION_ERROR | |
139 #define HOTSPOT_CLASS_INITIALIZATION_end HOTSPOT_CLASS_INITIALIZATION_END | |
140 #define DTRACE_CLASSINIT_PROBE(type, clss, thread_type) \ | |
141 { \ | |
142 char* data = NULL; \ | |
143 int len = 0; \ | |
144 Symbol* name = (clss)->name(); \ | |
145 if (name != NULL) { \ | |
146 data = (char*)name->bytes(); \ | |
147 len = name->utf8_length(); \ | |
148 } \ | |
149 HOTSPOT_CLASS_INITIALIZATION_##type( \ | |
150 data, len, (clss)->class_loader(), thread_type); \ | |
151 } | |
152 | |
153 #define DTRACE_CLASSINIT_PROBE_WAIT(type, clss, thread_type, wait) \ | |
154 { \ | |
155 char* data = NULL; \ | |
156 int len = 0; \ | |
157 Symbol* name = (clss)->name(); \ | |
158 if (name != NULL) { \ | |
159 data = (char*)name->bytes(); \ | |
160 len = name->utf8_length(); \ | |
161 } \ | |
162 HOTSPOT_CLASS_INITIALIZATION_##type( \ | |
163 data, len, (clss)->class_loader(), thread_type, wait); \ | |
164 } | |
165 #endif /* USDT2 */ | |
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166 |
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167 #else // ndef DTRACE_ENABLED |
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168 |
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169 #define DTRACE_CLASSINIT_PROBE(type, clss, thread_type) |
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170 #define DTRACE_CLASSINIT_PROBE_WAIT(type, clss, thread_type, wait) |
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171 |
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172 #endif // ndef DTRACE_ENABLED |
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173 |
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174 Klass* InstanceKlass::allocate_instance_klass(ClassLoaderData* loader_data, |
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175 int vtable_len, |
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176 int itable_len, |
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177 int static_field_size, |
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178 int nonstatic_oop_map_size, |
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179 ReferenceType rt, |
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180 AccessFlags access_flags, |
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181 Symbol* name, |
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182 Klass* super_klass, |
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183 KlassHandle host_klass, |
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184 TRAPS) { |
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185 |
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186 int size = InstanceKlass::size(vtable_len, itable_len, nonstatic_oop_map_size, |
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187 access_flags.is_interface(), |
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188 !host_klass.is_null()); |
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189 |
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190 // Allocation |
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191 InstanceKlass* ik; |
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192 if (rt == REF_NONE) { |
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193 if (name == vmSymbols::java_lang_Class()) { |
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194 ik = new (loader_data, size, THREAD) InstanceMirrorKlass( |
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195 vtable_len, itable_len, static_field_size, nonstatic_oop_map_size, rt, |
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196 access_flags, !host_klass.is_null()); |
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197 } else if (name == vmSymbols::java_lang_ClassLoader() || |
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198 (SystemDictionary::ClassLoader_klass_loaded() && |
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199 super_klass != NULL && |
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200 super_klass->is_subtype_of(SystemDictionary::ClassLoader_klass()))) { |
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201 ik = new (loader_data, size, THREAD) InstanceClassLoaderKlass( |
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202 vtable_len, itable_len, static_field_size, nonstatic_oop_map_size, rt, |
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203 access_flags, !host_klass.is_null()); |
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204 } else { |
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205 // normal class |
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206 ik = new (loader_data, size, THREAD) InstanceKlass( |
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207 vtable_len, itable_len, static_field_size, nonstatic_oop_map_size, rt, |
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208 access_flags, !host_klass.is_null()); |
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209 } |
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210 } else { |
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211 // reference klass |
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212 ik = new (loader_data, size, THREAD) InstanceRefKlass( |
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213 vtable_len, itable_len, static_field_size, nonstatic_oop_map_size, rt, |
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214 access_flags, !host_klass.is_null()); |
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215 } |
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216 |
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217 return ik; |
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218 } |
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219 |
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220 InstanceKlass::InstanceKlass(int vtable_len, |
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221 int itable_len, |
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222 int static_field_size, |
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223 int nonstatic_oop_map_size, |
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224 ReferenceType rt, |
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225 AccessFlags access_flags, |
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226 bool is_anonymous) { |
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227 No_Safepoint_Verifier no_safepoint; // until k becomes parsable |
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228 |
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229 int size = InstanceKlass::size(vtable_len, itable_len, nonstatic_oop_map_size, |
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230 access_flags.is_interface(), is_anonymous); |
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231 |
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232 // The sizes of these these three variables are used for determining the |
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233 // size of the instanceKlassOop. It is critical that these are set to the right |
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234 // sizes before the first GC, i.e., when we allocate the mirror. |
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235 this->set_vtable_length(vtable_len); |
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236 this->set_itable_length(itable_len); |
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237 this->set_static_field_size(static_field_size); |
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238 this->set_nonstatic_oop_map_size(nonstatic_oop_map_size); |
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239 this->set_access_flags(access_flags); |
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240 this->set_is_anonymous(is_anonymous); |
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241 assert(this->size() == size, "wrong size for object"); |
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242 |
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243 this->set_array_klasses(NULL); |
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244 this->set_methods(NULL); |
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245 this->set_method_ordering(NULL); |
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246 this->set_local_interfaces(NULL); |
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247 this->set_transitive_interfaces(NULL); |
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248 this->init_implementor(); |
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249 this->set_fields(NULL, 0); |
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250 this->set_constants(NULL); |
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251 this->set_class_loader_data(NULL); |
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252 this->set_protection_domain(NULL); |
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253 this->set_signers(NULL); |
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254 this->set_source_file_name(NULL); |
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255 this->set_source_debug_extension(NULL, 0); |
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256 this->set_array_name(NULL); |
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257 this->set_inner_classes(NULL); |
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258 this->set_static_oop_field_count(0); |
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259 this->set_nonstatic_field_size(0); |
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260 this->set_is_marked_dependent(false); |
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261 this->set_init_state(InstanceKlass::allocated); |
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262 this->set_init_thread(NULL); |
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263 this->set_init_lock(NULL); |
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264 this->set_reference_type(rt); |
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265 this->set_oop_map_cache(NULL); |
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266 this->set_jni_ids(NULL); |
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267 this->set_osr_nmethods_head(NULL); |
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268 this->set_breakpoints(NULL); |
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269 this->init_previous_versions(); |
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270 this->set_generic_signature(NULL); |
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271 this->release_set_methods_jmethod_ids(NULL); |
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272 this->release_set_methods_cached_itable_indices(NULL); |
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273 this->set_annotations(NULL); |
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274 this->set_jvmti_cached_class_field_map(NULL); |
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275 this->set_initial_method_idnum(0); |
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276 |
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277 // initialize the non-header words to zero |
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278 intptr_t* p = (intptr_t*)this; |
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279 for (int index = InstanceKlass::header_size(); index < size; index++) { |
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280 p[index] = NULL_WORD; |
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281 } |
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282 |
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283 // Set temporary value until parseClassFile updates it with the real instance |
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284 // size. |
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285 this->set_layout_helper(Klass::instance_layout_helper(0, true)); |
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286 } |
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287 |
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288 |
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289 // This function deallocates the metadata and C heap pointers that the |
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290 // InstanceKlass points to. |
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291 void InstanceKlass::deallocate_contents(ClassLoaderData* loader_data) { |
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292 |
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293 // Orphan the mirror first, CMS thinks it's still live. |
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294 java_lang_Class::set_klass(java_mirror(), NULL); |
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295 |
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296 // Need to take this class off the class loader data list. |
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297 loader_data->remove_class(this); |
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298 |
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299 // The array_klass for this class is created later, after error handling. |
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300 // For class redefinition, we keep the original class so this scratch class |
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301 // doesn't have an array class. Either way, assert that there is nothing |
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302 // to deallocate. |
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303 assert(array_klasses() == NULL, "array classes shouldn't be created for this class yet"); |
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304 |
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305 // Release C heap allocated data that this might point to, which includes |
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306 // reference counting symbol names. |
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307 release_C_heap_structures(); |
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308 |
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309 Array<Method*>* ms = methods(); |
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310 if (ms != Universe::the_empty_method_array()) { |
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311 for (int i = 0; i <= methods()->length() -1 ; i++) { |
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312 Method* method = methods()->at(i); |
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313 // Only want to delete methods that are not executing for RedefineClasses. |
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314 // The previous version will point to them so they're not totally dangling |
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315 assert (!method->on_stack(), "shouldn't be called with methods on stack"); |
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316 MetadataFactory::free_metadata(loader_data, method); |
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317 } |
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318 MetadataFactory::free_array<Method*>(loader_data, methods()); |
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319 } |
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320 set_methods(NULL); |
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321 |
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322 if (method_ordering() != Universe::the_empty_int_array()) { |
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323 MetadataFactory::free_array<int>(loader_data, method_ordering()); |
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324 } |
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325 set_method_ordering(NULL); |
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326 |
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327 // This array is in Klass, but remove it with the InstanceKlass since |
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328 // this place would be the only caller and it can share memory with transitive |
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329 // interfaces. |
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330 if (secondary_supers() != Universe::the_empty_klass_array() && |
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331 secondary_supers() != transitive_interfaces()) { |
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332 MetadataFactory::free_array<Klass*>(loader_data, secondary_supers()); |
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333 } |
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334 set_secondary_supers(NULL); |
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335 |
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336 // Only deallocate transitive interfaces if not empty, same as super class |
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337 // or same as local interfaces. See code in parseClassFile. |
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338 Array<Klass*>* ti = transitive_interfaces(); |
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339 if (ti != Universe::the_empty_klass_array() && ti != local_interfaces()) { |
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340 // check that the interfaces don't come from super class |
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341 Array<Klass*>* sti = (super() == NULL) ? NULL : |
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342 InstanceKlass::cast(super())->transitive_interfaces(); |
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343 if (ti != sti) { |
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344 MetadataFactory::free_array<Klass*>(loader_data, ti); |
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345 } |
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346 } |
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347 set_transitive_interfaces(NULL); |
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348 |
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349 // local interfaces can be empty |
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350 Array<Klass*>* li = local_interfaces(); |
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351 if (li != Universe::the_empty_klass_array()) { |
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352 MetadataFactory::free_array<Klass*>(loader_data, li); |
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353 } |
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354 set_local_interfaces(NULL); |
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355 |
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356 MetadataFactory::free_array<jushort>(loader_data, fields()); |
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357 set_fields(NULL, 0); |
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358 |
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359 // If a method from a redefined class is using this constant pool, don't |
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360 // delete it, yet. The new class's previous version will point to this. |
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361 assert (!constants()->on_stack(), "shouldn't be called if anything is onstack"); |
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362 MetadataFactory::free_metadata(loader_data, constants()); |
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363 set_constants(NULL); |
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364 |
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365 if (inner_classes() != Universe::the_empty_short_array()) { |
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366 MetadataFactory::free_array<jushort>(loader_data, inner_classes()); |
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367 } |
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368 set_inner_classes(NULL); |
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369 |
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370 // Null out Java heap objects, although these won't be walked to keep |
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371 // alive once this InstanceKlass is deallocated. |
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372 set_protection_domain(NULL); |
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373 set_signers(NULL); |
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374 set_init_lock(NULL); |
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375 set_annotations(NULL); |
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376 } |
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377 |
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378 volatile oop InstanceKlass::init_lock() const { |
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379 volatile oop lock = _init_lock; // read once |
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380 assert((oop)lock != NULL || !is_not_initialized(), // initialized or in_error state |
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381 "only fully initialized state can have a null lock"); |
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382 return lock; |
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383 } |
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384 |
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385 // Set the initialization lock to null so the object can be GC'ed. Any racing |
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386 // threads to get this lock will see a null lock and will not lock. |
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387 // That's okay because they all check for initialized state after getting |
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388 // the lock and return. |
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389 void InstanceKlass::fence_and_clear_init_lock() { |
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390 // make sure previous stores are all done, notably the init_state. |
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391 OrderAccess::storestore(); |
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392 klass_oop_store(&_init_lock, NULL); |
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393 assert(!is_not_initialized(), "class must be initialized now"); |
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394 } |
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395 |
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396 |
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397 bool InstanceKlass::should_be_initialized() const { |
0 | 398 return !is_initialized(); |
399 } | |
400 | |
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401 klassVtable* InstanceKlass::vtable() const { |
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402 return new klassVtable(this, start_of_vtable(), vtable_length() / vtableEntry::size()); |
0 | 403 } |
404 | |
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405 klassItable* InstanceKlass::itable() const { |
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406 return new klassItable(instanceKlassHandle(this)); |
0 | 407 } |
408 | |
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409 void InstanceKlass::eager_initialize(Thread *thread) { |
0 | 410 if (!EagerInitialization) return; |
411 | |
412 if (this->is_not_initialized()) { | |
413 // abort if the the class has a class initializer | |
414 if (this->class_initializer() != NULL) return; | |
415 | |
416 // abort if it is java.lang.Object (initialization is handled in genesis) | |
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417 Klass* super = this->super(); |
0 | 418 if (super == NULL) return; |
419 | |
420 // abort if the super class should be initialized | |
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421 if (!InstanceKlass::cast(super)->is_initialized()) return; |
0 | 422 |
423 // call body to expose the this pointer | |
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424 instanceKlassHandle this_oop(thread, this); |
0 | 425 eager_initialize_impl(this_oop); |
426 } | |
427 } | |
428 | |
429 | |
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430 void InstanceKlass::eager_initialize_impl(instanceKlassHandle this_oop) { |
0 | 431 EXCEPTION_MARK; |
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432 volatile oop init_lock = this_oop->init_lock(); |
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433 ObjectLocker ol(init_lock, THREAD, init_lock != NULL); |
0 | 434 |
435 // abort if someone beat us to the initialization | |
436 if (!this_oop->is_not_initialized()) return; // note: not equivalent to is_initialized() | |
437 | |
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438 ClassState old_state = this_oop->init_state(); |
0 | 439 link_class_impl(this_oop, true, THREAD); |
440 if (HAS_PENDING_EXCEPTION) { | |
441 CLEAR_PENDING_EXCEPTION; | |
442 // Abort if linking the class throws an exception. | |
443 | |
444 // Use a test to avoid redundantly resetting the state if there's | |
445 // no change. Set_init_state() asserts that state changes make | |
446 // progress, whereas here we might just be spinning in place. | |
447 if( old_state != this_oop->_init_state ) | |
448 this_oop->set_init_state (old_state); | |
449 } else { | |
450 // linking successfull, mark class as initialized | |
451 this_oop->set_init_state (fully_initialized); | |
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452 this_oop->fence_and_clear_init_lock(); |
0 | 453 // trace |
454 if (TraceClassInitialization) { | |
455 ResourceMark rm(THREAD); | |
456 tty->print_cr("[Initialized %s without side effects]", this_oop->external_name()); | |
457 } | |
458 } | |
459 } | |
460 | |
461 | |
462 // See "The Virtual Machine Specification" section 2.16.5 for a detailed explanation of the class initialization | |
463 // process. The step comments refers to the procedure described in that section. | |
464 // Note: implementation moved to static method to expose the this pointer. | |
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465 void InstanceKlass::initialize(TRAPS) { |
0 | 466 if (this->should_be_initialized()) { |
467 HandleMark hm(THREAD); | |
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468 instanceKlassHandle this_oop(THREAD, this); |
0 | 469 initialize_impl(this_oop, CHECK); |
470 // Note: at this point the class may be initialized | |
471 // OR it may be in the state of being initialized | |
472 // in case of recursive initialization! | |
473 } else { | |
474 assert(is_initialized(), "sanity check"); | |
475 } | |
476 } | |
477 | |
478 | |
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479 bool InstanceKlass::verify_code( |
0 | 480 instanceKlassHandle this_oop, bool throw_verifyerror, TRAPS) { |
481 // 1) Verify the bytecodes | |
482 Verifier::Mode mode = | |
483 throw_verifyerror ? Verifier::ThrowException : Verifier::NoException; | |
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484 return Verifier::verify(this_oop, mode, this_oop->should_verify_class(), CHECK_false); |
0 | 485 } |
486 | |
487 | |
488 // Used exclusively by the shared spaces dump mechanism to prevent | |
489 // classes mapped into the shared regions in new VMs from appearing linked. | |
490 | |
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491 void InstanceKlass::unlink_class() { |
0 | 492 assert(is_linked(), "must be linked"); |
493 _init_state = loaded; | |
494 } | |
495 | |
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496 void InstanceKlass::link_class(TRAPS) { |
0 | 497 assert(is_loaded(), "must be loaded"); |
498 if (!is_linked()) { | |
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499 HandleMark hm(THREAD); |
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500 instanceKlassHandle this_oop(THREAD, this); |
0 | 501 link_class_impl(this_oop, true, CHECK); |
502 } | |
503 } | |
504 | |
505 // Called to verify that a class can link during initialization, without | |
506 // throwing a VerifyError. | |
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507 bool InstanceKlass::link_class_or_fail(TRAPS) { |
0 | 508 assert(is_loaded(), "must be loaded"); |
509 if (!is_linked()) { | |
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510 HandleMark hm(THREAD); |
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511 instanceKlassHandle this_oop(THREAD, this); |
0 | 512 link_class_impl(this_oop, false, CHECK_false); |
513 } | |
514 return is_linked(); | |
515 } | |
516 | |
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517 bool InstanceKlass::link_class_impl( |
0 | 518 instanceKlassHandle this_oop, bool throw_verifyerror, TRAPS) { |
519 // check for error state | |
520 if (this_oop->is_in_error_state()) { | |
521 ResourceMark rm(THREAD); | |
522 THROW_MSG_(vmSymbols::java_lang_NoClassDefFoundError(), | |
523 this_oop->external_name(), false); | |
524 } | |
525 // return if already verified | |
526 if (this_oop->is_linked()) { | |
527 return true; | |
528 } | |
529 | |
530 // Timing | |
531 // timer handles recursion | |
532 assert(THREAD->is_Java_thread(), "non-JavaThread in link_class_impl"); | |
533 JavaThread* jt = (JavaThread*)THREAD; | |
534 | |
535 // link super class before linking this class | |
536 instanceKlassHandle super(THREAD, this_oop->super()); | |
537 if (super.not_null()) { | |
538 if (super->is_interface()) { // check if super class is an interface | |
539 ResourceMark rm(THREAD); | |
540 Exceptions::fthrow( | |
541 THREAD_AND_LOCATION, | |
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542 vmSymbols::java_lang_IncompatibleClassChangeError(), |
0 | 543 "class %s has interface %s as super class", |
544 this_oop->external_name(), | |
545 super->external_name() | |
546 ); | |
547 return false; | |
548 } | |
549 | |
550 link_class_impl(super, throw_verifyerror, CHECK_false); | |
551 } | |
552 | |
553 // link all interfaces implemented by this class before linking this class | |
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554 Array<Klass*>* interfaces = this_oop->local_interfaces(); |
0 | 555 int num_interfaces = interfaces->length(); |
556 for (int index = 0; index < num_interfaces; index++) { | |
557 HandleMark hm(THREAD); | |
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558 instanceKlassHandle ih(THREAD, interfaces->at(index)); |
0 | 559 link_class_impl(ih, throw_verifyerror, CHECK_false); |
560 } | |
561 | |
562 // in case the class is linked in the process of linking its superclasses | |
563 if (this_oop->is_linked()) { | |
564 return true; | |
565 } | |
566 | |
875
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567 // trace only the link time for this klass that includes |
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568 // the verification time |
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569 PerfClassTraceTime vmtimer(ClassLoader::perf_class_link_time(), |
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570 ClassLoader::perf_class_link_selftime(), |
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571 ClassLoader::perf_classes_linked(), |
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572 jt->get_thread_stat()->perf_recursion_counts_addr(), |
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573 jt->get_thread_stat()->perf_timers_addr(), |
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574 PerfClassTraceTime::CLASS_LINK); |
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575 |
0 | 576 // verification & rewriting |
577 { | |
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578 volatile oop init_lock = this_oop->init_lock(); |
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579 ObjectLocker ol(init_lock, THREAD, init_lock != NULL); |
0 | 580 // rewritten will have been set if loader constraint error found |
581 // on an earlier link attempt | |
582 // don't verify or rewrite if already rewritten | |
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583 |
0 | 584 if (!this_oop->is_linked()) { |
585 if (!this_oop->is_rewritten()) { | |
586 { | |
587 // Timer includes any side effects of class verification (resolution, | |
588 // etc), but not recursive entry into verify_code(). | |
875
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589 PerfClassTraceTime timer(ClassLoader::perf_class_verify_time(), |
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590 ClassLoader::perf_class_verify_selftime(), |
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591 ClassLoader::perf_classes_verified(), |
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592 jt->get_thread_stat()->perf_recursion_counts_addr(), |
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593 jt->get_thread_stat()->perf_timers_addr(), |
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594 PerfClassTraceTime::CLASS_VERIFY); |
0 | 595 bool verify_ok = verify_code(this_oop, throw_verifyerror, THREAD); |
596 if (!verify_ok) { | |
597 return false; | |
598 } | |
599 } | |
600 | |
601 // Just in case a side-effect of verify linked this class already | |
602 // (which can sometimes happen since the verifier loads classes | |
603 // using custom class loaders, which are free to initialize things) | |
604 if (this_oop->is_linked()) { | |
605 return true; | |
606 } | |
607 | |
608 // also sets rewritten | |
609 this_oop->rewrite_class(CHECK_false); | |
610 } | |
611 | |
3404 | 612 // relocate jsrs and link methods after they are all rewritten |
613 this_oop->relocate_and_link_methods(CHECK_false); | |
614 | |
0 | 615 // Initialize the vtable and interface table after |
616 // methods have been rewritten since rewrite may | |
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617 // fabricate new Method*s. |
0 | 618 // also does loader constraint checking |
619 if (!this_oop()->is_shared()) { | |
620 ResourceMark rm(THREAD); | |
621 this_oop->vtable()->initialize_vtable(true, CHECK_false); | |
622 this_oop->itable()->initialize_itable(true, CHECK_false); | |
623 } | |
624 #ifdef ASSERT | |
625 else { | |
626 ResourceMark rm(THREAD); | |
627 this_oop->vtable()->verify(tty, true); | |
628 // In case itable verification is ever added. | |
629 // this_oop->itable()->verify(tty, true); | |
630 } | |
631 #endif | |
632 this_oop->set_init_state(linked); | |
633 if (JvmtiExport::should_post_class_prepare()) { | |
634 Thread *thread = THREAD; | |
635 assert(thread->is_Java_thread(), "thread->is_Java_thread()"); | |
636 JvmtiExport::post_class_prepare((JavaThread *) thread, this_oop()); | |
637 } | |
638 } | |
639 } | |
640 return true; | |
641 } | |
642 | |
643 | |
644 // Rewrite the byte codes of all of the methods of a class. | |
645 // The rewriter must be called exactly once. Rewriting must happen after | |
646 // verification but before the first method of the class is executed. | |
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647 void InstanceKlass::rewrite_class(TRAPS) { |
0 | 648 assert(is_loaded(), "must be loaded"); |
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649 instanceKlassHandle this_oop(THREAD, this); |
0 | 650 if (this_oop->is_rewritten()) { |
651 assert(this_oop()->is_shared(), "rewriting an unshared class?"); | |
652 return; | |
653 } | |
3404 | 654 Rewriter::rewrite(this_oop, CHECK); |
0 | 655 this_oop->set_rewritten(); |
656 } | |
657 | |
3404 | 658 // Now relocate and link method entry points after class is rewritten. |
659 // This is outside is_rewritten flag. In case of an exception, it can be | |
660 // executed more than once. | |
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661 void InstanceKlass::relocate_and_link_methods(TRAPS) { |
3404 | 662 assert(is_loaded(), "must be loaded"); |
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663 instanceKlassHandle this_oop(THREAD, this); |
3404 | 664 Rewriter::relocate_and_link(this_oop, CHECK); |
665 } | |
666 | |
0 | 667 |
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668 void InstanceKlass::initialize_impl(instanceKlassHandle this_oop, TRAPS) { |
0 | 669 // Make sure klass is linked (verified) before initialization |
670 // A class could already be verified, since it has been reflected upon. | |
671 this_oop->link_class(CHECK); | |
672 | |
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673 DTRACE_CLASSINIT_PROBE(required, InstanceKlass::cast(this_oop()), -1); |
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674 |
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675 bool wait = false; |
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676 |
0 | 677 // refer to the JVM book page 47 for description of steps |
678 // Step 1 | |
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679 { |
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680 volatile oop init_lock = this_oop->init_lock(); |
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681 ObjectLocker ol(init_lock, THREAD, init_lock != NULL); |
0 | 682 |
683 Thread *self = THREAD; // it's passed the current thread | |
684 | |
685 // Step 2 | |
686 // If we were to use wait() instead of waitInterruptibly() then | |
687 // we might end up throwing IE from link/symbol resolution sites | |
688 // that aren't expected to throw. This would wreak havoc. See 6320309. | |
689 while(this_oop->is_being_initialized() && !this_oop->is_reentrant_initialization(self)) { | |
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690 wait = true; |
0 | 691 ol.waitUninterruptibly(CHECK); |
692 } | |
693 | |
694 // Step 3 | |
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695 if (this_oop->is_being_initialized() && this_oop->is_reentrant_initialization(self)) { |
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696 DTRACE_CLASSINIT_PROBE_WAIT(recursive, InstanceKlass::cast(this_oop()), -1,wait); |
0 | 697 return; |
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698 } |
0 | 699 |
700 // Step 4 | |
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701 if (this_oop->is_initialized()) { |
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702 DTRACE_CLASSINIT_PROBE_WAIT(concurrent, InstanceKlass::cast(this_oop()), -1,wait); |
0 | 703 return; |
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704 } |
0 | 705 |
706 // Step 5 | |
707 if (this_oop->is_in_error_state()) { | |
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708 DTRACE_CLASSINIT_PROBE_WAIT(erroneous, InstanceKlass::cast(this_oop()), -1,wait); |
0 | 709 ResourceMark rm(THREAD); |
710 const char* desc = "Could not initialize class "; | |
711 const char* className = this_oop->external_name(); | |
712 size_t msglen = strlen(desc) + strlen(className) + 1; | |
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713 char* message = NEW_RESOURCE_ARRAY(char, msglen); |
0 | 714 if (NULL == message) { |
715 // Out of memory: can't create detailed error message | |
716 THROW_MSG(vmSymbols::java_lang_NoClassDefFoundError(), className); | |
717 } else { | |
718 jio_snprintf(message, msglen, "%s%s", desc, className); | |
719 THROW_MSG(vmSymbols::java_lang_NoClassDefFoundError(), message); | |
720 } | |
721 } | |
722 | |
723 // Step 6 | |
724 this_oop->set_init_state(being_initialized); | |
725 this_oop->set_init_thread(self); | |
726 } | |
727 | |
728 // Step 7 | |
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729 Klass* super_klass = this_oop->super(); |
6983 | 730 if (super_klass != NULL && !this_oop->is_interface() && super_klass->should_be_initialized()) { |
731 super_klass->initialize(THREAD); | |
0 | 732 |
733 if (HAS_PENDING_EXCEPTION) { | |
734 Handle e(THREAD, PENDING_EXCEPTION); | |
735 CLEAR_PENDING_EXCEPTION; | |
736 { | |
737 EXCEPTION_MARK; | |
738 this_oop->set_initialization_state_and_notify(initialization_error, THREAD); // Locks object, set state, and notify all waiting threads | |
739 CLEAR_PENDING_EXCEPTION; // ignore any exception thrown, superclass initialization error is thrown below | |
740 } | |
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741 DTRACE_CLASSINIT_PROBE_WAIT(super__failed, InstanceKlass::cast(this_oop()), -1,wait); |
0 | 742 THROW_OOP(e()); |
743 } | |
744 } | |
745 | |
6934 | 746 if (this_oop->has_default_methods()) { |
747 // Step 7.5: initialize any interfaces which have default methods | |
748 for (int i = 0; i < this_oop->local_interfaces()->length(); ++i) { | |
749 Klass* iface = this_oop->local_interfaces()->at(i); | |
750 InstanceKlass* ik = InstanceKlass::cast(iface); | |
751 if (ik->has_default_methods() && ik->should_be_initialized()) { | |
752 ik->initialize(THREAD); | |
753 | |
754 if (HAS_PENDING_EXCEPTION) { | |
755 Handle e(THREAD, PENDING_EXCEPTION); | |
756 CLEAR_PENDING_EXCEPTION; | |
757 { | |
758 EXCEPTION_MARK; | |
759 // Locks object, set state, and notify all waiting threads | |
760 this_oop->set_initialization_state_and_notify( | |
761 initialization_error, THREAD); | |
762 | |
763 // ignore any exception thrown, superclass initialization error is | |
764 // thrown below | |
765 CLEAR_PENDING_EXCEPTION; | |
766 } | |
767 DTRACE_CLASSINIT_PROBE_WAIT( | |
768 super__failed, InstanceKlass::cast(this_oop()), -1, wait); | |
769 THROW_OOP(e()); | |
770 } | |
771 } | |
772 } | |
773 } | |
774 | |
0 | 775 // Step 8 |
776 { | |
777 assert(THREAD->is_Java_thread(), "non-JavaThread in initialize_impl"); | |
778 JavaThread* jt = (JavaThread*)THREAD; | |
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779 DTRACE_CLASSINIT_PROBE_WAIT(clinit, InstanceKlass::cast(this_oop()), -1,wait); |
0 | 780 // Timer includes any side effects of class initialization (resolution, |
781 // etc), but not recursive entry into call_class_initializer(). | |
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782 PerfClassTraceTime timer(ClassLoader::perf_class_init_time(), |
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783 ClassLoader::perf_class_init_selftime(), |
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784 ClassLoader::perf_classes_inited(), |
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785 jt->get_thread_stat()->perf_recursion_counts_addr(), |
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786 jt->get_thread_stat()->perf_timers_addr(), |
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787 PerfClassTraceTime::CLASS_CLINIT); |
0 | 788 this_oop->call_class_initializer(THREAD); |
789 } | |
790 | |
791 // Step 9 | |
792 if (!HAS_PENDING_EXCEPTION) { | |
793 this_oop->set_initialization_state_and_notify(fully_initialized, CHECK); | |
794 { ResourceMark rm(THREAD); | |
795 debug_only(this_oop->vtable()->verify(tty, true);) | |
796 } | |
797 } | |
798 else { | |
799 // Step 10 and 11 | |
800 Handle e(THREAD, PENDING_EXCEPTION); | |
801 CLEAR_PENDING_EXCEPTION; | |
802 { | |
803 EXCEPTION_MARK; | |
804 this_oop->set_initialization_state_and_notify(initialization_error, THREAD); | |
805 CLEAR_PENDING_EXCEPTION; // ignore any exception thrown, class initialization error is thrown below | |
806 } | |
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807 DTRACE_CLASSINIT_PROBE_WAIT(error, InstanceKlass::cast(this_oop()), -1,wait); |
1142 | 808 if (e->is_a(SystemDictionary::Error_klass())) { |
0 | 809 THROW_OOP(e()); |
810 } else { | |
811 JavaCallArguments args(e); | |
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812 THROW_ARG(vmSymbols::java_lang_ExceptionInInitializerError(), |
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813 vmSymbols::throwable_void_signature(), |
0 | 814 &args); |
815 } | |
816 } | |
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817 DTRACE_CLASSINIT_PROBE_WAIT(end, InstanceKlass::cast(this_oop()), -1,wait); |
0 | 818 } |
819 | |
820 | |
821 // Note: implementation moved to static method to expose the this pointer. | |
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822 void InstanceKlass::set_initialization_state_and_notify(ClassState state, TRAPS) { |
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823 instanceKlassHandle kh(THREAD, this); |
0 | 824 set_initialization_state_and_notify_impl(kh, state, CHECK); |
825 } | |
826 | |
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827 void InstanceKlass::set_initialization_state_and_notify_impl(instanceKlassHandle this_oop, ClassState state, TRAPS) { |
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828 volatile oop init_lock = this_oop->init_lock(); |
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829 ObjectLocker ol(init_lock, THREAD, init_lock != NULL); |
0 | 830 this_oop->set_init_state(state); |
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831 this_oop->fence_and_clear_init_lock(); |
0 | 832 ol.notify_all(CHECK); |
833 } | |
834 | |
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835 // The embedded _implementor field can only record one implementor. |
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836 // When there are more than one implementors, the _implementor field |
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837 // is set to the interface Klass* itself. Following are the possible |
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838 // values for the _implementor field: |
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839 // NULL - no implementor |
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840 // implementor Klass* - one implementor |
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841 // self - more than one implementor |
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842 // |
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843 // The _implementor field only exists for interfaces. |
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844 void InstanceKlass::add_implementor(Klass* k) { |
0 | 845 assert(Compile_lock->owned_by_self(), ""); |
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846 assert(is_interface(), "not interface"); |
0 | 847 // Filter out my subinterfaces. |
848 // (Note: Interfaces are never on the subklass list.) | |
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849 if (InstanceKlass::cast(k)->is_interface()) return; |
0 | 850 |
851 // Filter out subclasses whose supers already implement me. | |
852 // (Note: CHA must walk subclasses of direct implementors | |
853 // in order to locate indirect implementors.) | |
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854 Klass* sk = InstanceKlass::cast(k)->super(); |
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855 if (sk != NULL && InstanceKlass::cast(sk)->implements_interface(this)) |
0 | 856 // We only need to check one immediate superclass, since the |
857 // implements_interface query looks at transitive_interfaces. | |
858 // Any supers of the super have the same (or fewer) transitive_interfaces. | |
859 return; | |
860 | |
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861 Klass* ik = implementor(); |
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862 if (ik == NULL) { |
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863 set_implementor(k); |
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864 } else if (ik != this) { |
5998
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865 // There is already an implementor. Use itself as an indicator of |
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866 // more than one implementors. |
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867 set_implementor(this); |
0 | 868 } |
869 | |
870 // The implementor also implements the transitive_interfaces | |
871 for (int index = 0; index < local_interfaces()->length(); index++) { | |
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872 InstanceKlass::cast(local_interfaces()->at(index))->add_implementor(k); |
0 | 873 } |
874 } | |
875 | |
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876 void InstanceKlass::init_implementor() { |
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877 if (is_interface()) { |
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878 set_implementor(NULL); |
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879 } |
0 | 880 } |
881 | |
882 | |
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883 void InstanceKlass::process_interfaces(Thread *thread) { |
0 | 884 // link this class into the implementors list of every interface it implements |
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885 Klass* this_as_klass_oop = this; |
0 | 886 for (int i = local_interfaces()->length() - 1; i >= 0; i--) { |
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887 assert(local_interfaces()->at(i)->is_klass(), "must be a klass"); |
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888 InstanceKlass* interf = InstanceKlass::cast(local_interfaces()->at(i)); |
0 | 889 assert(interf->is_interface(), "expected interface"); |
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890 interf->add_implementor(this_as_klass_oop); |
0 | 891 } |
892 } | |
893 | |
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894 bool InstanceKlass::can_be_primary_super_slow() const { |
0 | 895 if (is_interface()) |
896 return false; | |
897 else | |
898 return Klass::can_be_primary_super_slow(); | |
899 } | |
900 | |
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901 GrowableArray<Klass*>* InstanceKlass::compute_secondary_supers(int num_extra_slots) { |
0 | 902 // The secondaries are the implemented interfaces. |
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903 InstanceKlass* ik = InstanceKlass::cast(this); |
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904 Array<Klass*>* interfaces = ik->transitive_interfaces(); |
0 | 905 int num_secondaries = num_extra_slots + interfaces->length(); |
906 if (num_secondaries == 0) { | |
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907 // Must share this for correct bootstrapping! |
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908 set_secondary_supers(Universe::the_empty_klass_array()); |
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909 return NULL; |
0 | 910 } else if (num_extra_slots == 0) { |
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911 // The secondary super list is exactly the same as the transitive interfaces. |
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912 // Redefine classes has to be careful not to delete this! |
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913 set_secondary_supers(interfaces); |
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914 return NULL; |
0 | 915 } else { |
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916 // Copy transitive interfaces to a temporary growable array to be constructed |
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917 // into the secondary super list with extra slots. |
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918 GrowableArray<Klass*>* secondaries = new GrowableArray<Klass*>(interfaces->length()); |
0 | 919 for (int i = 0; i < interfaces->length(); i++) { |
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920 secondaries->push(interfaces->at(i)); |
0 | 921 } |
922 return secondaries; | |
923 } | |
924 } | |
925 | |
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926 bool InstanceKlass::compute_is_subtype_of(Klass* k) { |
6983 | 927 if (k->is_interface()) { |
0 | 928 return implements_interface(k); |
929 } else { | |
930 return Klass::compute_is_subtype_of(k); | |
931 } | |
932 } | |
933 | |
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934 bool InstanceKlass::implements_interface(Klass* k) const { |
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935 if (this == k) return true; |
6983 | 936 assert(k->is_interface(), "should be an interface class"); |
0 | 937 for (int i = 0; i < transitive_interfaces()->length(); i++) { |
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938 if (transitive_interfaces()->at(i) == k) { |
0 | 939 return true; |
940 } | |
941 } | |
942 return false; | |
943 } | |
944 | |
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945 objArrayOop InstanceKlass::allocate_objArray(int n, int length, TRAPS) { |
0 | 946 if (length < 0) THROW_0(vmSymbols::java_lang_NegativeArraySizeException()); |
947 if (length > arrayOopDesc::max_array_length(T_OBJECT)) { | |
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948 report_java_out_of_memory("Requested array size exceeds VM limit"); |
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949 JvmtiExport::post_array_size_exhausted(); |
0 | 950 THROW_OOP_0(Universe::out_of_memory_error_array_size()); |
951 } | |
952 int size = objArrayOopDesc::object_size(length); | |
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953 Klass* ak = array_klass(n, CHECK_NULL); |
0 | 954 KlassHandle h_ak (THREAD, ak); |
955 objArrayOop o = | |
956 (objArrayOop)CollectedHeap::array_allocate(h_ak, size, length, CHECK_NULL); | |
957 return o; | |
958 } | |
959 | |
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960 instanceOop InstanceKlass::register_finalizer(instanceOop i, TRAPS) { |
0 | 961 if (TraceFinalizerRegistration) { |
962 tty->print("Registered "); | |
963 i->print_value_on(tty); | |
964 tty->print_cr(" (" INTPTR_FORMAT ") as finalizable", (address)i); | |
965 } | |
966 instanceHandle h_i(THREAD, i); | |
967 // Pass the handle as argument, JavaCalls::call expects oop as jobjects | |
968 JavaValue result(T_VOID); | |
969 JavaCallArguments args(h_i); | |
970 methodHandle mh (THREAD, Universe::finalizer_register_method()); | |
971 JavaCalls::call(&result, mh, &args, CHECK_NULL); | |
972 return h_i(); | |
973 } | |
974 | |
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975 instanceOop InstanceKlass::allocate_instance(TRAPS) { |
0 | 976 bool has_finalizer_flag = has_finalizer(); // Query before possible GC |
977 int size = size_helper(); // Query before forming handle. | |
978 | |
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979 KlassHandle h_k(THREAD, this); |
0 | 980 |
981 instanceOop i; | |
982 | |
983 i = (instanceOop)CollectedHeap::obj_allocate(h_k, size, CHECK_NULL); | |
984 if (has_finalizer_flag && !RegisterFinalizersAtInit) { | |
985 i = register_finalizer(i, CHECK_NULL); | |
986 } | |
987 return i; | |
988 } | |
989 | |
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990 void InstanceKlass::check_valid_for_instantiation(bool throwError, TRAPS) { |
0 | 991 if (is_interface() || is_abstract()) { |
992 ResourceMark rm(THREAD); | |
993 THROW_MSG(throwError ? vmSymbols::java_lang_InstantiationError() | |
994 : vmSymbols::java_lang_InstantiationException(), external_name()); | |
995 } | |
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996 if (this == SystemDictionary::Class_klass()) { |
0 | 997 ResourceMark rm(THREAD); |
998 THROW_MSG(throwError ? vmSymbols::java_lang_IllegalAccessError() | |
999 : vmSymbols::java_lang_IllegalAccessException(), external_name()); | |
1000 } | |
1001 } | |
1002 | |
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1003 Klass* InstanceKlass::array_klass_impl(bool or_null, int n, TRAPS) { |
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1004 instanceKlassHandle this_oop(THREAD, this); |
0 | 1005 return array_klass_impl(this_oop, or_null, n, THREAD); |
1006 } | |
1007 | |
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1008 Klass* InstanceKlass::array_klass_impl(instanceKlassHandle this_oop, bool or_null, int n, TRAPS) { |
0 | 1009 if (this_oop->array_klasses() == NULL) { |
1010 if (or_null) return NULL; | |
1011 | |
1012 ResourceMark rm; | |
1013 JavaThread *jt = (JavaThread *)THREAD; | |
1014 { | |
1015 // Atomic creation of array_klasses | |
1016 MutexLocker mc(Compile_lock, THREAD); // for vtables | |
1017 MutexLocker ma(MultiArray_lock, THREAD); | |
1018 | |
1019 // Check if update has already taken place | |
1020 if (this_oop->array_klasses() == NULL) { | |
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1021 Klass* k = ObjArrayKlass::allocate_objArray_klass(this_oop->class_loader_data(), 1, this_oop, CHECK_NULL); |
0 | 1022 this_oop->set_array_klasses(k); |
1023 } | |
1024 } | |
1025 } | |
1026 // _this will always be set at this point | |
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1027 ObjArrayKlass* oak = (ObjArrayKlass*)this_oop->array_klasses(); |
0 | 1028 if (or_null) { |
1029 return oak->array_klass_or_null(n); | |
1030 } | |
1031 return oak->array_klass(n, CHECK_NULL); | |
1032 } | |
1033 | |
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1034 Klass* InstanceKlass::array_klass_impl(bool or_null, TRAPS) { |
0 | 1035 return array_klass_impl(or_null, 1, THREAD); |
1036 } | |
1037 | |
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1038 void InstanceKlass::call_class_initializer(TRAPS) { |
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1039 instanceKlassHandle ik (THREAD, this); |
0 | 1040 call_class_initializer_impl(ik, THREAD); |
1041 } | |
1042 | |
1043 static int call_class_initializer_impl_counter = 0; // for debugging | |
1044 | |
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1045 Method* InstanceKlass::class_initializer() { |
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1046 Method* clinit = find_method( |
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1047 vmSymbols::class_initializer_name(), vmSymbols::void_method_signature()); |
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1048 if (clinit != NULL && clinit->has_valid_initializer_flags()) { |
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1049 return clinit; |
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1050 } |
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1051 return NULL; |
0 | 1052 } |
1053 | |
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1054 void InstanceKlass::call_class_initializer_impl(instanceKlassHandle this_oop, TRAPS) { |
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1055 if (ReplayCompiles && |
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1056 (ReplaySuppressInitializers == 1 || |
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1057 ReplaySuppressInitializers >= 2 && this_oop->class_loader() != NULL)) { |
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1058 // Hide the existence of the initializer for the purpose of replaying the compile |
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1059 return; |
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1060 } |
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1061 |
0 | 1062 methodHandle h_method(THREAD, this_oop->class_initializer()); |
1063 assert(!this_oop->is_initialized(), "we cannot initialize twice"); | |
1064 if (TraceClassInitialization) { | |
1065 tty->print("%d Initializing ", call_class_initializer_impl_counter++); | |
1066 this_oop->name()->print_value(); | |
1067 tty->print_cr("%s (" INTPTR_FORMAT ")", h_method() == NULL ? "(no method)" : "", (address)this_oop()); | |
1068 } | |
1069 if (h_method() != NULL) { | |
1070 JavaCallArguments args; // No arguments | |
1071 JavaValue result(T_VOID); | |
1072 JavaCalls::call(&result, h_method, &args, CHECK); // Static call (no args) | |
1073 } | |
1074 } | |
1075 | |
1076 | |
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1077 void InstanceKlass::mask_for(methodHandle method, int bci, |
0 | 1078 InterpreterOopMap* entry_for) { |
1079 // Dirty read, then double-check under a lock. | |
1080 if (_oop_map_cache == NULL) { | |
1081 // Otherwise, allocate a new one. | |
1082 MutexLocker x(OopMapCacheAlloc_lock); | |
1083 // First time use. Allocate a cache in C heap | |
1084 if (_oop_map_cache == NULL) { | |
1085 _oop_map_cache = new OopMapCache(); | |
1086 } | |
1087 } | |
1088 // _oop_map_cache is constant after init; lookup below does is own locking. | |
1089 _oop_map_cache->lookup(method, bci, entry_for); | |
1090 } | |
1091 | |
1092 | |
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1093 bool InstanceKlass::find_local_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const { |
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1094 for (JavaFieldStream fs(this); !fs.done(); fs.next()) { |
3938 | 1095 Symbol* f_name = fs.name(); |
1096 Symbol* f_sig = fs.signature(); | |
0 | 1097 if (f_name == name && f_sig == sig) { |
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1098 fd->initialize(const_cast<InstanceKlass*>(this), fs.index()); |
0 | 1099 return true; |
1100 } | |
1101 } | |
1102 return false; | |
1103 } | |
1104 | |
1105 | |
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1106 Klass* InstanceKlass::find_interface_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const { |
0 | 1107 const int n = local_interfaces()->length(); |
1108 for (int i = 0; i < n; i++) { | |
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1109 Klass* intf1 = local_interfaces()->at(i); |
6983 | 1110 assert(intf1->is_interface(), "just checking type"); |
0 | 1111 // search for field in current interface |
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1112 if (InstanceKlass::cast(intf1)->find_local_field(name, sig, fd)) { |
0 | 1113 assert(fd->is_static(), "interface field must be static"); |
1114 return intf1; | |
1115 } | |
1116 // search for field in direct superinterfaces | |
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1117 Klass* intf2 = InstanceKlass::cast(intf1)->find_interface_field(name, sig, fd); |
0 | 1118 if (intf2 != NULL) return intf2; |
1119 } | |
1120 // otherwise field lookup fails | |
1121 return NULL; | |
1122 } | |
1123 | |
1124 | |
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1125 Klass* InstanceKlass::find_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const { |
0 | 1126 // search order according to newest JVM spec (5.4.3.2, p.167). |
1127 // 1) search for field in current klass | |
1128 if (find_local_field(name, sig, fd)) { | |
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1129 return const_cast<InstanceKlass*>(this); |
0 | 1130 } |
1131 // 2) search for field recursively in direct superinterfaces | |
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1132 { Klass* intf = find_interface_field(name, sig, fd); |
0 | 1133 if (intf != NULL) return intf; |
1134 } | |
1135 // 3) apply field lookup recursively if superclass exists | |
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1136 { Klass* supr = super(); |
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1137 if (supr != NULL) return InstanceKlass::cast(supr)->find_field(name, sig, fd); |
0 | 1138 } |
1139 // 4) otherwise field lookup fails | |
1140 return NULL; | |
1141 } | |
1142 | |
1143 | |
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1144 Klass* InstanceKlass::find_field(Symbol* name, Symbol* sig, bool is_static, fieldDescriptor* fd) const { |
0 | 1145 // search order according to newest JVM spec (5.4.3.2, p.167). |
1146 // 1) search for field in current klass | |
1147 if (find_local_field(name, sig, fd)) { | |
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1148 if (fd->is_static() == is_static) return const_cast<InstanceKlass*>(this); |
0 | 1149 } |
1150 // 2) search for field recursively in direct superinterfaces | |
1151 if (is_static) { | |
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1152 Klass* intf = find_interface_field(name, sig, fd); |
0 | 1153 if (intf != NULL) return intf; |
1154 } | |
1155 // 3) apply field lookup recursively if superclass exists | |
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1156 { Klass* supr = super(); |
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1157 if (supr != NULL) return InstanceKlass::cast(supr)->find_field(name, sig, is_static, fd); |
0 | 1158 } |
1159 // 4) otherwise field lookup fails | |
1160 return NULL; | |
1161 } | |
1162 | |
1163 | |
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1164 bool InstanceKlass::find_local_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const { |
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1165 for (JavaFieldStream fs(this); !fs.done(); fs.next()) { |
3938 | 1166 if (fs.offset() == offset) { |
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1167 fd->initialize(const_cast<InstanceKlass*>(this), fs.index()); |
0 | 1168 if (fd->is_static() == is_static) return true; |
1169 } | |
1170 } | |
1171 return false; | |
1172 } | |
1173 | |
1174 | |
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1175 bool InstanceKlass::find_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const { |
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1176 Klass* klass = const_cast<InstanceKlass*>(this); |
0 | 1177 while (klass != NULL) { |
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1178 if (InstanceKlass::cast(klass)->find_local_field_from_offset(offset, is_static, fd)) { |
0 | 1179 return true; |
1180 } | |
6983 | 1181 klass = klass->super(); |
0 | 1182 } |
1183 return false; | |
1184 } | |
1185 | |
1186 | |
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1187 void InstanceKlass::methods_do(void f(Method* method)) { |
0 | 1188 int len = methods()->length(); |
1189 for (int index = 0; index < len; index++) { | |
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1190 Method* m = methods()->at(index); |
0 | 1191 assert(m->is_method(), "must be method"); |
1192 f(m); | |
1193 } | |
1194 } | |
1195 | |
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1196 |
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1197 void InstanceKlass::do_local_static_fields(FieldClosure* cl) { |
3938 | 1198 for (JavaFieldStream fs(this); !fs.done(); fs.next()) { |
1199 if (fs.access_flags().is_static()) { | |
1200 fieldDescriptor fd; | |
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1201 fd.initialize(this, fs.index()); |
3938 | 1202 cl->do_field(&fd); |
1203 } | |
0 | 1204 } |
1205 } | |
1206 | |
1207 | |
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1208 void InstanceKlass::do_local_static_fields(void f(fieldDescriptor*, TRAPS), TRAPS) { |
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1209 instanceKlassHandle h_this(THREAD, this); |
0 | 1210 do_local_static_fields_impl(h_this, f, CHECK); |
1211 } | |
1212 | |
1213 | |
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1214 void InstanceKlass::do_local_static_fields_impl(instanceKlassHandle this_oop, void f(fieldDescriptor* fd, TRAPS), TRAPS) { |
3938 | 1215 for (JavaFieldStream fs(this_oop()); !fs.done(); fs.next()) { |
1216 if (fs.access_flags().is_static()) { | |
1217 fieldDescriptor fd; | |
1218 fd.initialize(this_oop(), fs.index()); | |
1219 f(&fd, CHECK); | |
1220 } | |
0 | 1221 } |
1222 } | |
1223 | |
1224 | |
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1225 static int compare_fields_by_offset(int* a, int* b) { |
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1226 return a[0] - b[0]; |
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1227 } |
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1228 |
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1229 void InstanceKlass::do_nonstatic_fields(FieldClosure* cl) { |
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1230 InstanceKlass* super = superklass(); |
0 | 1231 if (super != NULL) { |
1232 super->do_nonstatic_fields(cl); | |
1233 } | |
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1234 fieldDescriptor fd; |
3938 | 1235 int length = java_fields_count(); |
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1236 // In DebugInfo nonstatic fields are sorted by offset. |
6197 | 1237 int* fields_sorted = NEW_C_HEAP_ARRAY(int, 2*(length+1), mtClass); |
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1238 int j = 0; |
3938 | 1239 for (int i = 0; i < length; i += 1) { |
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1240 fd.initialize(this, i); |
44
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1241 if (!fd.is_static()) { |
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1242 fields_sorted[j + 0] = fd.offset(); |
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1243 fields_sorted[j + 1] = i; |
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1244 j += 2; |
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1245 } |
0 | 1246 } |
44
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1247 if (j > 0) { |
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1248 length = j; |
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1249 // _sort_Fn is defined in growableArray.hpp. |
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1250 qsort(fields_sorted, length/2, 2*sizeof(int), (_sort_Fn)compare_fields_by_offset); |
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1251 for (int i = 0; i < length; i += 2) { |
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1252 fd.initialize(this, fields_sorted[i + 1]); |
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1253 assert(!fd.is_static() && fd.offset() == fields_sorted[i], "only nonstatic fields"); |
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1254 cl->do_field(&fd); |
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1255 } |
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1256 } |
6197 | 1257 FREE_C_HEAP_ARRAY(int, fields_sorted, mtClass); |
0 | 1258 } |
1259 | |
1260 | |
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1261 void InstanceKlass::array_klasses_do(void f(Klass* k, TRAPS), TRAPS) { |
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1262 if (array_klasses() != NULL) |
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1263 ArrayKlass::cast(array_klasses())->array_klasses_do(f, THREAD); |
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1264 } |
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1265 |
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1266 void InstanceKlass::array_klasses_do(void f(Klass* k)) { |
0 | 1267 if (array_klasses() != NULL) |
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1268 ArrayKlass::cast(array_klasses())->array_klasses_do(f); |
0 | 1269 } |
1270 | |
1271 | |
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1272 void InstanceKlass::with_array_klasses_do(void f(Klass* k)) { |
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1273 f(this); |
0 | 1274 array_klasses_do(f); |
1275 } | |
1276 | |
1277 #ifdef ASSERT | |
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1278 static int linear_search(Array<Method*>* methods, Symbol* name, Symbol* signature) { |
0 | 1279 int len = methods->length(); |
1280 for (int index = 0; index < len; index++) { | |
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1281 Method* m = methods->at(index); |
0 | 1282 assert(m->is_method(), "must be method"); |
1283 if (m->signature() == signature && m->name() == name) { | |
1284 return index; | |
1285 } | |
1286 } | |
1287 return -1; | |
1288 } | |
1289 #endif | |
1290 | |
6934 | 1291 static int binary_search(Array<Method*>* methods, Symbol* name) { |
0 | 1292 int len = methods->length(); |
1293 // methods are sorted, so do binary search | |
1294 int l = 0; | |
1295 int h = len - 1; | |
1296 while (l <= h) { | |
1297 int mid = (l + h) >> 1; | |
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1298 Method* m = methods->at(mid); |
0 | 1299 assert(m->is_method(), "must be method"); |
1300 int res = m->name()->fast_compare(name); | |
1301 if (res == 0) { | |
6934 | 1302 return mid; |
0 | 1303 } else if (res < 0) { |
1304 l = mid + 1; | |
1305 } else { | |
1306 h = mid - 1; | |
1307 } | |
1308 } | |
6934 | 1309 return -1; |
1310 } | |
1311 | |
1312 Method* InstanceKlass::find_method(Symbol* name, Symbol* signature) const { | |
1313 return InstanceKlass::find_method(methods(), name, signature); | |
1314 } | |
1315 | |
1316 Method* InstanceKlass::find_method( | |
1317 Array<Method*>* methods, Symbol* name, Symbol* signature) { | |
1318 int hit = binary_search(methods, name); | |
1319 if (hit != -1) { | |
1320 Method* m = methods->at(hit); | |
1321 // Do linear search to find matching signature. First, quick check | |
1322 // for common case | |
1323 if (m->signature() == signature) return m; | |
1324 // search downwards through overloaded methods | |
1325 int i; | |
1326 for (i = hit - 1; i >= 0; --i) { | |
1327 Method* m = methods->at(i); | |
1328 assert(m->is_method(), "must be method"); | |
1329 if (m->name() != name) break; | |
1330 if (m->signature() == signature) return m; | |
1331 } | |
1332 // search upwards | |
1333 for (i = hit + 1; i < methods->length(); ++i) { | |
1334 Method* m = methods->at(i); | |
1335 assert(m->is_method(), "must be method"); | |
1336 if (m->name() != name) break; | |
1337 if (m->signature() == signature) return m; | |
1338 } | |
1339 // not found | |
0 | 1340 #ifdef ASSERT |
6934 | 1341 int index = linear_search(methods, name, signature); |
1342 assert(index == -1, err_msg("binary search should have found entry %d", index)); | |
0 | 1343 #endif |
6934 | 1344 } |
0 | 1345 return NULL; |
1346 } | |
1347 | |
6934 | 1348 int InstanceKlass::find_method_by_name(Symbol* name, int* end) { |
1349 return find_method_by_name(methods(), name, end); | |
1350 } | |
1351 | |
1352 int InstanceKlass::find_method_by_name( | |
1353 Array<Method*>* methods, Symbol* name, int* end_ptr) { | |
1354 assert(end_ptr != NULL, "just checking"); | |
1355 int start = binary_search(methods, name); | |
1356 int end = start + 1; | |
1357 if (start != -1) { | |
1358 while (start - 1 >= 0 && (methods->at(start - 1))->name() == name) --start; | |
1359 while (end < methods->length() && (methods->at(end))->name() == name) ++end; | |
1360 *end_ptr = end; | |
1361 return start; | |
1362 } | |
1363 return -1; | |
1364 } | |
1365 | |
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1366 Method* InstanceKlass::uncached_lookup_method(Symbol* name, Symbol* signature) const { |
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1367 Klass* klass = const_cast<InstanceKlass*>(this); |
0 | 1368 while (klass != NULL) { |
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1369 Method* method = InstanceKlass::cast(klass)->find_method(name, signature); |
0 | 1370 if (method != NULL) return method; |
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1371 klass = InstanceKlass::cast(klass)->super(); |
0 | 1372 } |
1373 return NULL; | |
1374 } | |
1375 | |
1376 // lookup a method in all the interfaces that this class implements | |
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1377 Method* InstanceKlass::lookup_method_in_all_interfaces(Symbol* name, |
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1378 Symbol* signature) const { |
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1379 Array<Klass*>* all_ifs = transitive_interfaces(); |
0 | 1380 int num_ifs = all_ifs->length(); |
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1381 InstanceKlass *ik = NULL; |
0 | 1382 for (int i = 0; i < num_ifs; i++) { |
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1383 ik = InstanceKlass::cast(all_ifs->at(i)); |
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1384 Method* m = ik->lookup_method(name, signature); |
0 | 1385 if (m != NULL) { |
1386 return m; | |
1387 } | |
1388 } | |
1389 return NULL; | |
1390 } | |
1391 | |
1392 /* jni_id_for_impl for jfieldIds only */ | |
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1393 JNIid* InstanceKlass::jni_id_for_impl(instanceKlassHandle this_oop, int offset) { |
0 | 1394 MutexLocker ml(JfieldIdCreation_lock); |
1395 // Retry lookup after we got the lock | |
1396 JNIid* probe = this_oop->jni_ids() == NULL ? NULL : this_oop->jni_ids()->find(offset); | |
1397 if (probe == NULL) { | |
1398 // Slow case, allocate new static field identifier | |
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1399 probe = new JNIid(this_oop(), offset, this_oop->jni_ids()); |
0 | 1400 this_oop->set_jni_ids(probe); |
1401 } | |
1402 return probe; | |
1403 } | |
1404 | |
1405 | |
1406 /* jni_id_for for jfieldIds only */ | |
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1407 JNIid* InstanceKlass::jni_id_for(int offset) { |
0 | 1408 JNIid* probe = jni_ids() == NULL ? NULL : jni_ids()->find(offset); |
1409 if (probe == NULL) { | |
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1410 probe = jni_id_for_impl(this, offset); |
0 | 1411 } |
1412 return probe; | |
1413 } | |
1414 | |
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1415 u2 InstanceKlass::enclosing_method_data(int offset) { |
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1416 Array<jushort>* inner_class_list = inner_classes(); |
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1417 if (inner_class_list == NULL) { |
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1418 return 0; |
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1419 } |
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1420 int length = inner_class_list->length(); |
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1421 if (length % inner_class_next_offset == 0) { |
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1422 return 0; |
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1423 } else { |
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1424 int index = length - enclosing_method_attribute_size; |
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1425 assert(offset < enclosing_method_attribute_size, "invalid offset"); |
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1426 return inner_class_list->at(index + offset); |
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1427 } |
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1428 } |
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1429 |
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1430 void InstanceKlass::set_enclosing_method_indices(u2 class_index, |
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1431 u2 method_index) { |
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1432 Array<jushort>* inner_class_list = inner_classes(); |
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1433 assert (inner_class_list != NULL, "_inner_classes list is not set up"); |
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1434 int length = inner_class_list->length(); |
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1435 if (length % inner_class_next_offset == enclosing_method_attribute_size) { |
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1436 int index = length - enclosing_method_attribute_size; |
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1437 inner_class_list->at_put( |
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1438 index + enclosing_method_class_index_offset, class_index); |
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1439 inner_class_list->at_put( |
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1440 index + enclosing_method_method_index_offset, method_index); |
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1441 } |
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1442 } |
0 | 1443 |
1444 // Lookup or create a jmethodID. | |
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1445 // This code is called by the VMThread and JavaThreads so the |
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1446 // locking has to be done very carefully to avoid deadlocks |
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1447 // and/or other cache consistency problems. |
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1448 // |
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1449 jmethodID InstanceKlass::get_jmethod_id(instanceKlassHandle ik_h, methodHandle method_h) { |
0 | 1450 size_t idnum = (size_t)method_h->method_idnum(); |
1451 jmethodID* jmeths = ik_h->methods_jmethod_ids_acquire(); | |
1452 size_t length = 0; | |
1453 jmethodID id = NULL; | |
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1454 |
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1455 // We use a double-check locking idiom here because this cache is |
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1456 // performance sensitive. In the normal system, this cache only |
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1457 // transitions from NULL to non-NULL which is safe because we use |
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1458 // release_set_methods_jmethod_ids() to advertise the new cache. |
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1459 // A partially constructed cache should never be seen by a racing |
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1460 // thread. We also use release_store_ptr() to save a new jmethodID |
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1461 // in the cache so a partially constructed jmethodID should never be |
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1462 // seen either. Cache reads of existing jmethodIDs proceed without a |
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1463 // lock, but cache writes of a new jmethodID requires uniqueness and |
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1464 // creation of the cache itself requires no leaks so a lock is |
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1465 // generally acquired in those two cases. |
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1466 // |
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1467 // If the RedefineClasses() API has been used, then this cache can |
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1468 // grow and we'll have transitions from non-NULL to bigger non-NULL. |
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1469 // Cache creation requires no leaks and we require safety between all |
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1470 // cache accesses and freeing of the old cache so a lock is generally |
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1471 // acquired when the RedefineClasses() API has been used. |
0 | 1472 |
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1473 if (jmeths != NULL) { |
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1474 // the cache already exists |
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1475 if (!ik_h->idnum_can_increment()) { |
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1476 // the cache can't grow so we can just get the current values |
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1477 get_jmethod_id_length_value(jmeths, idnum, &length, &id); |
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1478 } else { |
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1479 // cache can grow so we have to be more careful |
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1480 if (Threads::number_of_threads() == 0 || |
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1481 SafepointSynchronize::is_at_safepoint()) { |
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1482 // we're single threaded or at a safepoint - no locking needed |
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1483 get_jmethod_id_length_value(jmeths, idnum, &length, &id); |
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1484 } else { |
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1485 MutexLocker ml(JmethodIdCreation_lock); |
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1486 get_jmethod_id_length_value(jmeths, idnum, &length, &id); |
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1487 } |
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1488 } |
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1489 } |
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1490 // implied else: |
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1491 // we need to allocate a cache so default length and id values are good |
0 | 1492 |
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1493 if (jmeths == NULL || // no cache yet |
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1494 length <= idnum || // cache is too short |
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1495 id == NULL) { // cache doesn't contain entry |
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1496 |
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1497 // This function can be called by the VMThread so we have to do all |
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1498 // things that might block on a safepoint before grabbing the lock. |
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1499 // Otherwise, we can deadlock with the VMThread or have a cache |
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1500 // consistency issue. These vars keep track of what we might have |
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1501 // to free after the lock is dropped. |
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1502 jmethodID to_dealloc_id = NULL; |
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1503 jmethodID* to_dealloc_jmeths = NULL; |
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1504 |
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1505 // may not allocate new_jmeths or use it if we allocate it |
0 | 1506 jmethodID* new_jmeths = NULL; |
1507 if (length <= idnum) { | |
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1508 // allocate a new cache that might be used |
0 | 1509 size_t size = MAX2(idnum+1, (size_t)ik_h->idnum_allocated_count()); |
6197 | 1510 new_jmeths = NEW_C_HEAP_ARRAY(jmethodID, size+1, mtClass); |
0 | 1511 memset(new_jmeths, 0, (size+1)*sizeof(jmethodID)); |
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1512 // cache size is stored in element[0], other elements offset by one |
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1513 new_jmeths[0] = (jmethodID)size; |
0 | 1514 } |
1515 | |
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1516 // allocate a new jmethodID that might be used |
0 | 1517 jmethodID new_id = NULL; |
1518 if (method_h->is_old() && !method_h->is_obsolete()) { | |
1519 // The method passed in is old (but not obsolete), we need to use the current version | |
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1520 Method* current_method = ik_h->method_with_idnum((int)idnum); |
0 | 1521 assert(current_method != NULL, "old and but not obsolete, so should exist"); |
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1522 new_id = Method::make_jmethod_id(ik_h->class_loader_data(), current_method); |
0 | 1523 } else { |
1524 // It is the current version of the method or an obsolete method, | |
1525 // use the version passed in | |
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1526 new_id = Method::make_jmethod_id(ik_h->class_loader_data(), method_h()); |
0 | 1527 } |
1528 | |
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1529 if (Threads::number_of_threads() == 0 || |
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1530 SafepointSynchronize::is_at_safepoint()) { |
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1531 // we're single threaded or at a safepoint - no locking needed |
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1532 id = get_jmethod_id_fetch_or_update(ik_h, idnum, new_id, new_jmeths, |
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1533 &to_dealloc_id, &to_dealloc_jmeths); |
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1534 } else { |
0 | 1535 MutexLocker ml(JmethodIdCreation_lock); |
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1536 id = get_jmethod_id_fetch_or_update(ik_h, idnum, new_id, new_jmeths, |
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1537 &to_dealloc_id, &to_dealloc_jmeths); |
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1538 } |
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1539 |
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1540 // The lock has been dropped so we can free resources. |
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1541 // Free up either the old cache or the new cache if we allocated one. |
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1542 if (to_dealloc_jmeths != NULL) { |
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1543 FreeHeap(to_dealloc_jmeths); |
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1544 } |
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1545 // free up the new ID since it wasn't needed |
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1546 if (to_dealloc_id != NULL) { |
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1547 Method::destroy_jmethod_id(ik_h->class_loader_data(), to_dealloc_id); |
49
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1548 } |
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1549 } |
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1550 return id; |
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1551 } |
0 | 1552 |
49
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1553 |
977
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1554 // Common code to fetch the jmethodID from the cache or update the |
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1555 // cache with the new jmethodID. This function should never do anything |
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1556 // that causes the caller to go to a safepoint or we can deadlock with |
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1557 // the VMThread or have cache consistency issues. |
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1558 // |
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1559 jmethodID InstanceKlass::get_jmethod_id_fetch_or_update( |
977
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1560 instanceKlassHandle ik_h, size_t idnum, jmethodID new_id, |
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1561 jmethodID* new_jmeths, jmethodID* to_dealloc_id_p, |
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1562 jmethodID** to_dealloc_jmeths_p) { |
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1563 assert(new_id != NULL, "sanity check"); |
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1564 assert(to_dealloc_id_p != NULL, "sanity check"); |
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|
1565 assert(to_dealloc_jmeths_p != NULL, "sanity check"); |
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1566 assert(Threads::number_of_threads() == 0 || |
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1567 SafepointSynchronize::is_at_safepoint() || |
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1568 JmethodIdCreation_lock->owned_by_self(), "sanity check"); |
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1569 |
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1570 // reacquire the cache - we are locked, single threaded or at a safepoint |
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1571 jmethodID* jmeths = ik_h->methods_jmethod_ids_acquire(); |
977
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1572 jmethodID id = NULL; |
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1573 size_t length = 0; |
0 | 1574 |
977
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1575 if (jmeths == NULL || // no cache yet |
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1576 (length = (size_t)jmeths[0]) <= idnum) { // cache is too short |
49
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1577 if (jmeths != NULL) { |
977
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|
1578 // copy any existing entries from the old cache |
49
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1579 for (size_t index = 0; index < length; index++) { |
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1580 new_jmeths[index+1] = jmeths[index+1]; |
0 | 1581 } |
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1582 *to_dealloc_jmeths_p = jmeths; // save old cache for later delete |
0 | 1583 } |
49
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1584 ik_h->release_set_methods_jmethod_ids(jmeths = new_jmeths); |
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1585 } else { |
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1586 // fetch jmethodID (if any) from the existing cache |
49
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1587 id = jmeths[idnum+1]; |
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1588 *to_dealloc_jmeths_p = new_jmeths; // save new cache for later delete |
49
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1589 } |
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1590 if (id == NULL) { |
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1591 // No matching jmethodID in the existing cache or we have a new |
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1592 // cache or we just grew the cache. This cache write is done here |
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1593 // by the first thread to win the foot race because a jmethodID |
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1594 // needs to be unique once it is generally available. |
49
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1595 id = new_id; |
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1596 |
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1597 // The jmethodID cache can be read while unlocked so we have to |
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1598 // make sure the new jmethodID is complete before installing it |
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1599 // in the cache. |
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1600 OrderAccess::release_store_ptr(&jmeths[idnum+1], id); |
49
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1601 } else { |
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1602 *to_dealloc_id_p = new_id; // save new id for later delete |
0 | 1603 } |
1604 return id; | |
1605 } | |
1606 | |
1607 | |
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1608 // Common code to get the jmethodID cache length and the jmethodID |
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1609 // value at index idnum if there is one. |
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1610 // |
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1611 void InstanceKlass::get_jmethod_id_length_value(jmethodID* cache, |
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1612 size_t idnum, size_t *length_p, jmethodID* id_p) { |
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1613 assert(cache != NULL, "sanity check"); |
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1614 assert(length_p != NULL, "sanity check"); |
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1615 assert(id_p != NULL, "sanity check"); |
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1616 |
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1617 // cache size is stored in element[0], other elements offset by one |
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1618 *length_p = (size_t)cache[0]; |
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1619 if (*length_p <= idnum) { // cache is too short |
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1620 *id_p = NULL; |
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1621 } else { |
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1622 *id_p = cache[idnum+1]; // fetch jmethodID (if any) |
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1623 } |
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1624 } |
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|
1625 |
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1626 |
0 | 1627 // Lookup a jmethodID, NULL if not found. Do no blocking, no allocations, no handles |
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1628 jmethodID InstanceKlass::jmethod_id_or_null(Method* method) { |
0 | 1629 size_t idnum = (size_t)method->method_idnum(); |
1630 jmethodID* jmeths = methods_jmethod_ids_acquire(); | |
1631 size_t length; // length assigned as debugging crumb | |
1632 jmethodID id = NULL; | |
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1633 if (jmeths != NULL && // If there is a cache |
0 | 1634 (length = (size_t)jmeths[0]) > idnum) { // and if it is long enough, |
1635 id = jmeths[idnum+1]; // Look up the id (may be NULL) | |
1636 } | |
1637 return id; | |
1638 } | |
1639 | |
1640 | |
1641 // Cache an itable index | |
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1642 void InstanceKlass::set_cached_itable_index(size_t idnum, int index) { |
0 | 1643 int* indices = methods_cached_itable_indices_acquire(); |
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1644 int* to_dealloc_indices = NULL; |
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1645 |
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1646 // We use a double-check locking idiom here because this cache is |
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1647 // performance sensitive. In the normal system, this cache only |
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1648 // transitions from NULL to non-NULL which is safe because we use |
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1649 // release_set_methods_cached_itable_indices() to advertise the |
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1650 // new cache. A partially constructed cache should never be seen |
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1651 // by a racing thread. Cache reads and writes proceed without a |
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1652 // lock, but creation of the cache itself requires no leaks so a |
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1653 // lock is generally acquired in that case. |
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|
1654 // |
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|
1655 // If the RedefineClasses() API has been used, then this cache can |
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1656 // grow and we'll have transitions from non-NULL to bigger non-NULL. |
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1657 // Cache creation requires no leaks and we require safety between all |
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1658 // cache accesses and freeing of the old cache so a lock is generally |
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1659 // acquired when the RedefineClasses() API has been used. |
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|
1660 |
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|
1661 if (indices == NULL || idnum_can_increment()) { |
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1662 // we need a cache or the cache can grow |
0 | 1663 MutexLocker ml(JNICachedItableIndex_lock); |
977
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|
1664 // reacquire the cache to see if another thread already did the work |
0 | 1665 indices = methods_cached_itable_indices_acquire(); |
1666 size_t length = 0; | |
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1667 // cache size is stored in element[0], other elements offset by one |
0 | 1668 if (indices == NULL || (length = (size_t)indices[0]) <= idnum) { |
1669 size_t size = MAX2(idnum+1, (size_t)idnum_allocated_count()); | |
6197 | 1670 int* new_indices = NEW_C_HEAP_ARRAY(int, size+1, mtClass); |
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1671 new_indices[0] = (int)size; |
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|
1672 // copy any existing entries |
0 | 1673 size_t i; |
1674 for (i = 0; i < length; i++) { | |
1675 new_indices[i+1] = indices[i+1]; | |
1676 } | |
1677 // Set all the rest to -1 | |
1678 for (i = length; i < size; i++) { | |
1679 new_indices[i+1] = -1; | |
1680 } | |
1681 if (indices != NULL) { | |
977
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1682 // We have an old cache to delete so save it for after we |
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|
1683 // drop the lock. |
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|
1684 to_dealloc_indices = indices; |
0 | 1685 } |
1686 release_set_methods_cached_itable_indices(indices = new_indices); | |
1687 } | |
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1688 |
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1689 if (idnum_can_increment()) { |
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1690 // this cache can grow so we have to write to it safely |
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1691 indices[idnum+1] = index; |
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1692 } |
0 | 1693 } else { |
1694 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); | |
1695 } | |
977
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1696 |
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1697 if (!idnum_can_increment()) { |
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1698 // The cache cannot grow and this JNI itable index value does not |
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1699 // have to be unique like a jmethodID. If there is a race to set it, |
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1700 // it doesn't matter. |
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1701 indices[idnum+1] = index; |
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1702 } |
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1703 |
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1704 if (to_dealloc_indices != NULL) { |
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1705 // we allocated a new cache so free the old one |
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1706 FreeHeap(to_dealloc_indices); |
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1707 } |
0 | 1708 } |
1709 | |
1710 | |
1711 // Retrieve a cached itable index | |
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1712 int InstanceKlass::cached_itable_index(size_t idnum) { |
0 | 1713 int* indices = methods_cached_itable_indices_acquire(); |
1714 if (indices != NULL && ((size_t)indices[0]) > idnum) { | |
1715 // indices exist and are long enough, retrieve possible cached | |
1716 return indices[idnum+1]; | |
1717 } | |
1718 return -1; | |
1719 } | |
1720 | |
1721 | |
1722 // | |
1723 // Walk the list of dependent nmethods searching for nmethods which | |
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1724 // are dependent on the changes that were passed in and mark them for |
0 | 1725 // deoptimization. Returns the number of nmethods found. |
1726 // | |
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1727 int InstanceKlass::mark_dependent_nmethods(DepChange& changes) { |
0 | 1728 assert_locked_or_safepoint(CodeCache_lock); |
1729 int found = 0; | |
1730 nmethodBucket* b = _dependencies; | |
1731 while (b != NULL) { | |
1732 nmethod* nm = b->get_nmethod(); | |
1733 // since dependencies aren't removed until an nmethod becomes a zombie, | |
1734 // the dependency list may contain nmethods which aren't alive. | |
1735 if (nm->is_alive() && !nm->is_marked_for_deoptimization() && nm->check_dependency_on(changes)) { | |
1736 if (TraceDependencies) { | |
1737 ResourceMark rm; | |
1738 tty->print_cr("Marked for deoptimization"); | |
1739 tty->print_cr(" context = %s", this->external_name()); | |
1740 changes.print(); | |
1741 nm->print(); | |
1742 nm->print_dependencies(); | |
1743 } | |
1744 nm->mark_for_deoptimization(); | |
1745 found++; | |
1746 } | |
1747 b = b->next(); | |
1748 } | |
1749 return found; | |
1750 } | |
1751 | |
1752 | |
1753 // | |
1754 // Add an nmethodBucket to the list of dependencies for this nmethod. | |
1755 // It's possible that an nmethod has multiple dependencies on this klass | |
1756 // so a count is kept for each bucket to guarantee that creation and | |
1757 // deletion of dependencies is consistent. | |
1758 // | |
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1759 void InstanceKlass::add_dependent_nmethod(nmethod* nm) { |
0 | 1760 assert_locked_or_safepoint(CodeCache_lock); |
1761 nmethodBucket* b = _dependencies; | |
1762 nmethodBucket* last = NULL; | |
1763 while (b != NULL) { | |
1764 if (nm == b->get_nmethod()) { | |
1765 b->increment(); | |
1766 return; | |
1767 } | |
1768 b = b->next(); | |
1769 } | |
1770 _dependencies = new nmethodBucket(nm, _dependencies); | |
1771 } | |
1772 | |
1773 | |
1774 // | |
1775 // Decrement count of the nmethod in the dependency list and remove | |
1776 // the bucket competely when the count goes to 0. This method must | |
1777 // find a corresponding bucket otherwise there's a bug in the | |
1778 // recording of dependecies. | |
1779 // | |
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1780 void InstanceKlass::remove_dependent_nmethod(nmethod* nm) { |
0 | 1781 assert_locked_or_safepoint(CodeCache_lock); |
1782 nmethodBucket* b = _dependencies; | |
1783 nmethodBucket* last = NULL; | |
1784 while (b != NULL) { | |
1785 if (nm == b->get_nmethod()) { | |
1786 if (b->decrement() == 0) { | |
1787 if (last == NULL) { | |
1788 _dependencies = b->next(); | |
1789 } else { | |
1790 last->set_next(b->next()); | |
1791 } | |
1792 delete b; | |
1793 } | |
1794 return; | |
1795 } | |
1796 last = b; | |
1797 b = b->next(); | |
1798 } | |
1799 #ifdef ASSERT | |
1800 tty->print_cr("### %s can't find dependent nmethod:", this->external_name()); | |
1801 nm->print(); | |
1802 #endif // ASSERT | |
1803 ShouldNotReachHere(); | |
1804 } | |
1805 | |
1806 | |
1807 #ifndef PRODUCT | |
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1808 void InstanceKlass::print_dependent_nmethods(bool verbose) { |
0 | 1809 nmethodBucket* b = _dependencies; |
1810 int idx = 0; | |
1811 while (b != NULL) { | |
1812 nmethod* nm = b->get_nmethod(); | |
1813 tty->print("[%d] count=%d { ", idx++, b->count()); | |
1814 if (!verbose) { | |
1815 nm->print_on(tty, "nmethod"); | |
1816 tty->print_cr(" } "); | |
1817 } else { | |
1818 nm->print(); | |
1819 nm->print_dependencies(); | |
1820 tty->print_cr("--- } "); | |
1821 } | |
1822 b = b->next(); | |
1823 } | |
1824 } | |
1825 | |
1826 | |
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1827 bool InstanceKlass::is_dependent_nmethod(nmethod* nm) { |
0 | 1828 nmethodBucket* b = _dependencies; |
1829 while (b != NULL) { | |
1830 if (nm == b->get_nmethod()) { | |
1831 return true; | |
1832 } | |
1833 b = b->next(); | |
1834 } | |
1835 return false; | |
1836 } | |
1837 #endif //PRODUCT | |
1838 | |
1839 | |
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1840 // Garbage collection |
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1841 |
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1842 void InstanceKlass::oops_do(OopClosure* cl) { |
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1843 Klass::oops_do(cl); |
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1844 |
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1845 cl->do_oop(adr_protection_domain()); |
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1846 cl->do_oop(adr_signers()); |
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1847 cl->do_oop(adr_init_lock()); |
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1848 |
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1849 // Don't walk the arrays since they are walked from the ClassLoaderData objects. |
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1850 } |
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1851 |
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1852 #ifdef ASSERT |
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1853 template <class T> void assert_is_in(T *p) { |
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1854 T heap_oop = oopDesc::load_heap_oop(p); |
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1855 if (!oopDesc::is_null(heap_oop)) { |
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1856 oop o = oopDesc::decode_heap_oop_not_null(heap_oop); |
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1857 assert(Universe::heap()->is_in(o), "should be in heap"); |
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1858 } |
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1859 } |
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1860 template <class T> void assert_is_in_closed_subset(T *p) { |
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1861 T heap_oop = oopDesc::load_heap_oop(p); |
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1862 if (!oopDesc::is_null(heap_oop)) { |
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1863 oop o = oopDesc::decode_heap_oop_not_null(heap_oop); |
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1864 assert(Universe::heap()->is_in_closed_subset(o), |
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1865 err_msg("should be in closed *p " INTPTR_FORMAT " " INTPTR_FORMAT, (address)p, (address)o)); |
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1866 } |
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1867 } |
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1868 template <class T> void assert_is_in_reserved(T *p) { |
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1869 T heap_oop = oopDesc::load_heap_oop(p); |
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1870 if (!oopDesc::is_null(heap_oop)) { |
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1871 oop o = oopDesc::decode_heap_oop_not_null(heap_oop); |
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1872 assert(Universe::heap()->is_in_reserved(o), "should be in reserved"); |
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1873 } |
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1874 } |
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1875 template <class T> void assert_nothing(T *p) {} |
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1876 |
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1877 #else |
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1878 template <class T> void assert_is_in(T *p) {} |
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1879 template <class T> void assert_is_in_closed_subset(T *p) {} |
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1880 template <class T> void assert_is_in_reserved(T *p) {} |
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1881 template <class T> void assert_nothing(T *p) {} |
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1882 #endif // ASSERT |
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1883 |
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1884 // |
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1885 // Macros that iterate over areas of oops which are specialized on type of |
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1886 // oop pointer either narrow or wide, depending on UseCompressedOops |
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1887 // |
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1888 // Parameters are: |
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1889 // T - type of oop to point to (either oop or narrowOop) |
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1890 // start_p - starting pointer for region to iterate over |
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1891 // count - number of oops or narrowOops to iterate over |
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1892 // do_oop - action to perform on each oop (it's arbitrary C code which |
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1893 // makes it more efficient to put in a macro rather than making |
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1894 // it a template function) |
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1895 // assert_fn - assert function which is template function because performance |
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1896 // doesn't matter when enabled. |
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1897 #define InstanceKlass_SPECIALIZED_OOP_ITERATE( \ |
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1898 T, start_p, count, do_oop, \ |
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1899 assert_fn) \ |
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1900 { \ |
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1901 T* p = (T*)(start_p); \ |
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1902 T* const end = p + (count); \ |
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1903 while (p < end) { \ |
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1904 (assert_fn)(p); \ |
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1905 do_oop; \ |
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1906 ++p; \ |
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1907 } \ |
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1908 } |
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1909 |
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1910 #define InstanceKlass_SPECIALIZED_OOP_REVERSE_ITERATE( \ |
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1911 T, start_p, count, do_oop, \ |
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1912 assert_fn) \ |
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1913 { \ |
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1914 T* const start = (T*)(start_p); \ |
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1915 T* p = start + (count); \ |
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1916 while (start < p) { \ |
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1917 --p; \ |
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1918 (assert_fn)(p); \ |
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1919 do_oop; \ |
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1920 } \ |
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1921 } |
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1922 |
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1923 #define InstanceKlass_SPECIALIZED_BOUNDED_OOP_ITERATE( \ |
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1924 T, start_p, count, low, high, \ |
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1925 do_oop, assert_fn) \ |
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1926 { \ |
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1927 T* const l = (T*)(low); \ |
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1928 T* const h = (T*)(high); \ |
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1929 assert(mask_bits((intptr_t)l, sizeof(T)-1) == 0 && \ |
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1930 mask_bits((intptr_t)h, sizeof(T)-1) == 0, \ |
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1931 "bounded region must be properly aligned"); \ |
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1932 T* p = (T*)(start_p); \ |
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1933 T* end = p + (count); \ |
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1934 if (p < l) p = l; \ |
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1935 if (end > h) end = h; \ |
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1936 while (p < end) { \ |
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1937 (assert_fn)(p); \ |
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1938 do_oop; \ |
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1939 ++p; \ |
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1940 } \ |
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1941 } |
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1942 |
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1943 |
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1944 // The following macros call specialized macros, passing either oop or |
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1945 // narrowOop as the specialization type. These test the UseCompressedOops |
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1946 // flag. |
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1947 #define InstanceKlass_OOP_MAP_ITERATE(obj, do_oop, assert_fn) \ |
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1948 { \ |
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1949 /* Compute oopmap block range. The common case \ |
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1950 is nonstatic_oop_map_size == 1. */ \ |
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1951 OopMapBlock* map = start_of_nonstatic_oop_maps(); \ |
938 | 1952 OopMapBlock* const end_map = map + nonstatic_oop_map_count(); \ |
113
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1953 if (UseCompressedOops) { \ |
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1954 while (map < end_map) { \ |
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1955 InstanceKlass_SPECIALIZED_OOP_ITERATE(narrowOop, \ |
938 | 1956 obj->obj_field_addr<narrowOop>(map->offset()), map->count(), \ |
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1957 do_oop, assert_fn) \ |
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1958 ++map; \ |
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1959 } \ |
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1960 } else { \ |
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1961 while (map < end_map) { \ |
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1962 InstanceKlass_SPECIALIZED_OOP_ITERATE(oop, \ |
938 | 1963 obj->obj_field_addr<oop>(map->offset()), map->count(), \ |
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1964 do_oop, assert_fn) \ |
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1965 ++map; \ |
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1966 } \ |
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1967 } \ |
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1968 } |
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1969 |
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1970 #define InstanceKlass_OOP_MAP_REVERSE_ITERATE(obj, do_oop, assert_fn) \ |
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1971 { \ |
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1972 OopMapBlock* const start_map = start_of_nonstatic_oop_maps(); \ |
938 | 1973 OopMapBlock* map = start_map + nonstatic_oop_map_count(); \ |
113
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1974 if (UseCompressedOops) { \ |
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1975 while (start_map < map) { \ |
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1976 --map; \ |
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1977 InstanceKlass_SPECIALIZED_OOP_REVERSE_ITERATE(narrowOop, \ |
938 | 1978 obj->obj_field_addr<narrowOop>(map->offset()), map->count(), \ |
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1979 do_oop, assert_fn) \ |
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1980 } \ |
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1981 } else { \ |
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1982 while (start_map < map) { \ |
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1983 --map; \ |
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1984 InstanceKlass_SPECIALIZED_OOP_REVERSE_ITERATE(oop, \ |
938 | 1985 obj->obj_field_addr<oop>(map->offset()), map->count(), \ |
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1986 do_oop, assert_fn) \ |
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1987 } \ |
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1988 } \ |
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1989 } |
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1990 |
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1991 #define InstanceKlass_BOUNDED_OOP_MAP_ITERATE(obj, low, high, do_oop, \ |
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1992 assert_fn) \ |
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1993 { \ |
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1994 /* Compute oopmap block range. The common case is \ |
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1995 nonstatic_oop_map_size == 1, so we accept the \ |
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1996 usually non-existent extra overhead of examining \ |
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1997 all the maps. */ \ |
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1998 OopMapBlock* map = start_of_nonstatic_oop_maps(); \ |
938 | 1999 OopMapBlock* const end_map = map + nonstatic_oop_map_count(); \ |
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2000 if (UseCompressedOops) { \ |
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2001 while (map < end_map) { \ |
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2002 InstanceKlass_SPECIALIZED_BOUNDED_OOP_ITERATE(narrowOop, \ |
938 | 2003 obj->obj_field_addr<narrowOop>(map->offset()), map->count(), \ |
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2004 low, high, \ |
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2005 do_oop, assert_fn) \ |
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2006 ++map; \ |
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2007 } \ |
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2008 } else { \ |
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2009 while (map < end_map) { \ |
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2010 InstanceKlass_SPECIALIZED_BOUNDED_OOP_ITERATE(oop, \ |
938 | 2011 obj->obj_field_addr<oop>(map->offset()), map->count(), \ |
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2012 low, high, \ |
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2013 do_oop, assert_fn) \ |
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2014 ++map; \ |
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2015 } \ |
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2016 } \ |
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2017 } |
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2018 |
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2019 void InstanceKlass::oop_follow_contents(oop obj) { |
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2020 assert(obj != NULL, "can't follow the content of NULL object"); |
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2021 MarkSweep::follow_klass(obj->klass()); |
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2022 InstanceKlass_OOP_MAP_ITERATE( \ |
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2023 obj, \ |
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2024 MarkSweep::mark_and_push(p), \ |
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2025 assert_is_in_closed_subset) |
0 | 2026 } |
2027 | |
2028 #ifndef SERIALGC | |
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2029 void InstanceKlass::oop_follow_contents(ParCompactionManager* cm, |
0 | 2030 oop obj) { |
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2031 assert(obj != NULL, "can't follow the content of NULL object"); |
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2032 PSParallelCompact::follow_klass(cm, obj->klass()); |
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2033 // Only mark the header and let the scan of the meta-data mark |
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2034 // everything else. |
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2035 InstanceKlass_OOP_MAP_ITERATE( \ |
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2036 obj, \ |
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2037 PSParallelCompact::mark_and_push(cm, p), \ |
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2038 assert_is_in) |
0 | 2039 } |
2040 #endif // SERIALGC | |
2041 | |
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2042 // closure's do_metadata() method dictates whether the given closure should be |
0 | 2043 // applied to the klass ptr in the object header. |
2044 | |
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2045 #define if_do_metadata_checked(closure, nv_suffix) \ |
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2046 /* Make sure the non-virtual and the virtual versions match. */ \ |
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2047 assert(closure->do_metadata##nv_suffix() == closure->do_metadata(), \ |
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2048 "Inconsistency in do_metadata"); \ |
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2049 if (closure->do_metadata##nv_suffix()) |
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2050 |
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2051 #define InstanceKlass_OOP_OOP_ITERATE_DEFN(OopClosureType, nv_suffix) \ |
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2052 \ |
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2053 int InstanceKlass::oop_oop_iterate##nv_suffix(oop obj, OopClosureType* closure) { \ |
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2054 SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::ik);\ |
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2055 /* header */ \ |
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2056 if_do_metadata_checked(closure, nv_suffix) { \ |
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2057 closure->do_klass##nv_suffix(obj->klass()); \ |
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2058 } \ |
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2059 InstanceKlass_OOP_MAP_ITERATE( \ |
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2060 obj, \ |
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2061 SpecializationStats:: \ |
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2062 record_do_oop_call##nv_suffix(SpecializationStats::ik); \ |
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2063 (closure)->do_oop##nv_suffix(p), \ |
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2064 assert_is_in_closed_subset) \ |
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2065 return size_helper(); \ |
0 | 2066 } |
2067 | |
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2068 #ifndef SERIALGC |
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2069 #define InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DEFN(OopClosureType, nv_suffix) \ |
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2070 \ |
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2071 int InstanceKlass::oop_oop_iterate_backwards##nv_suffix(oop obj, \ |
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2072 OopClosureType* closure) { \ |
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2073 SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::ik); \ |
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2074 /* header */ \ |
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2075 if_do_metadata_checked(closure, nv_suffix) { \ |
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2076 closure->do_klass##nv_suffix(obj->klass()); \ |
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2077 } \ |
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2078 /* instance variables */ \ |
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2079 InstanceKlass_OOP_MAP_REVERSE_ITERATE( \ |
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2080 obj, \ |
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2081 SpecializationStats::record_do_oop_call##nv_suffix(SpecializationStats::ik);\ |
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2082 (closure)->do_oop##nv_suffix(p), \ |
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2083 assert_is_in_closed_subset) \ |
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2084 return size_helper(); \ |
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2085 } |
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2086 #endif // !SERIALGC |
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2087 |
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2088 #define InstanceKlass_OOP_OOP_ITERATE_DEFN_m(OopClosureType, nv_suffix) \ |
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2089 \ |
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2090 int InstanceKlass::oop_oop_iterate##nv_suffix##_m(oop obj, \ |
113
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2091 OopClosureType* closure, \ |
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2092 MemRegion mr) { \ |
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2093 SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::ik);\ |
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2094 if_do_metadata_checked(closure, nv_suffix) { \ |
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2095 if (mr.contains(obj)) { \ |
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2096 closure->do_klass##nv_suffix(obj->klass()); \ |
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2097 } \ |
113
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2098 } \ |
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2099 InstanceKlass_BOUNDED_OOP_MAP_ITERATE( \ |
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2100 obj, mr.start(), mr.end(), \ |
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2101 (closure)->do_oop##nv_suffix(p), \ |
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2102 assert_is_in_closed_subset) \ |
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2103 return size_helper(); \ |
0 | 2104 } |
2105 | |
2106 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_DEFN) | |
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2107 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_DEFN) |
0 | 2108 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_DEFN_m) |
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2109 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_DEFN_m) |
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2110 #ifndef SERIALGC |
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2111 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DEFN) |
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2112 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DEFN) |
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2113 #endif // !SERIALGC |
0 | 2114 |
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2115 int InstanceKlass::oop_adjust_pointers(oop obj) { |
0 | 2116 int size = size_helper(); |
113
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2117 InstanceKlass_OOP_MAP_ITERATE( \ |
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2118 obj, \ |
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2119 MarkSweep::adjust_pointer(p), \ |
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2120 assert_is_in) |
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2121 MarkSweep::adjust_klass(obj->klass()); |
0 | 2122 return size; |
2123 } | |
2124 | |
2125 #ifndef SERIALGC | |
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2126 void InstanceKlass::oop_push_contents(PSPromotionManager* pm, oop obj) { |
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2127 InstanceKlass_OOP_MAP_REVERSE_ITERATE( \ |
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2128 obj, \ |
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2129 if (PSScavenge::should_scavenge(p)) { \ |
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2130 pm->claim_or_forward_depth(p); \ |
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2131 }, \ |
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2132 assert_nothing ) |
0 | 2133 } |
2134 | |
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2135 int InstanceKlass::oop_update_pointers(ParCompactionManager* cm, oop obj) { |
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2136 int size = size_helper(); |
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2137 InstanceKlass_OOP_MAP_ITERATE( \ |
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2138 obj, \ |
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2139 PSParallelCompact::adjust_pointer(p), \ |
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2140 assert_is_in) |
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2141 obj->update_header(cm); |
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2142 return size; |
0 | 2143 } |
2144 | |
2145 #endif // SERIALGC | |
2146 | |
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2147 void InstanceKlass::clean_implementors_list(BoolObjectClosure* is_alive) { |
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2148 assert(is_loader_alive(is_alive), "this klass should be live"); |
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2149 if (is_interface()) { |
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2150 if (ClassUnloading) { |
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2151 Klass* impl = implementor(); |
5998
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2152 if (impl != NULL) { |
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2153 if (!impl->is_loader_alive(is_alive)) { |
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2154 // remove this guy |
6038
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2155 *adr_implementor() = NULL; |
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2156 } |
0 | 2157 } |
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2158 } |
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2159 } |
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2160 } |
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2161 |
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2162 void InstanceKlass::clean_method_data(BoolObjectClosure* is_alive) { |
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2163 #if defined(COMPILER2) || defined(GRAAL) |
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2164 // Currently only used by C2 and Graal |
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2165 for (int m = 0; m < methods()->length(); m++) { |
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2166 MethodData* mdo = methods()->at(m)->method_data(); |
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2167 if (mdo != NULL) { |
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2168 for (ProfileData* data = mdo->first_data(); |
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2169 mdo->is_valid(data); |
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2170 data = mdo->next_data(data)) { |
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2171 data->clean_weak_klass_links(is_alive); |
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2172 } |
0 | 2173 } |
2174 } | |
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2175 #else |
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2176 #ifdef ASSERT |
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2177 // Verify that we haven't started to use MDOs for C1. |
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2178 for (int m = 0; m < methods()->length(); m++) { |
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2179 MethodData* mdo = methods()->at(m)->method_data(); |
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2180 assert(mdo == NULL, "Didn't expect C1 to use MDOs"); |
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2181 } |
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2182 #endif // ASSERT |
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2183 #endif // !COMPILER2 |
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2184 } |
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2185 |
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2186 |
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2187 static void remove_unshareable_in_class(Klass* k) { |
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2188 // remove klass's unshareable info |
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2189 k->remove_unshareable_info(); |
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2190 } |
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2191 |
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2192 void InstanceKlass::remove_unshareable_info() { |
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2193 Klass::remove_unshareable_info(); |
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2194 // Unlink the class |
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2195 if (is_linked()) { |
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2196 unlink_class(); |
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2197 } |
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2198 init_implementor(); |
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2199 |
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2200 constants()->remove_unshareable_info(); |
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2201 |
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2202 for (int i = 0; i < methods()->length(); i++) { |
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2203 Method* m = methods()->at(i); |
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2204 m->remove_unshareable_info(); |
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2205 } |
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2206 |
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2207 // Need to reinstate when reading back the class. |
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2208 set_init_lock(NULL); |
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2209 |
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2210 // do array classes also. |
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2211 array_klasses_do(remove_unshareable_in_class); |
0 | 2212 } |
2213 | |
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2214 void restore_unshareable_in_class(Klass* k, TRAPS) { |
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2215 k->restore_unshareable_info(CHECK); |
0 | 2216 } |
2217 | |
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2218 void InstanceKlass::restore_unshareable_info(TRAPS) { |
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2219 Klass::restore_unshareable_info(CHECK); |
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2220 instanceKlassHandle ik(THREAD, this); |
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2221 |
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2222 Array<Method*>* methods = ik->methods(); |
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2223 int num_methods = methods->length(); |
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2224 for (int index2 = 0; index2 < num_methods; ++index2) { |
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2225 methodHandle m(THREAD, methods->at(index2)); |
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2226 m()->link_method(m, CHECK); |
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2227 // restore method's vtable by calling a virtual function |
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2228 m->restore_vtable(); |
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2229 } |
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2230 if (JvmtiExport::has_redefined_a_class()) { |
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2231 // Reinitialize vtable because RedefineClasses may have changed some |
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2232 // entries in this vtable for super classes so the CDS vtable might |
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2233 // point to old or obsolete entries. RedefineClasses doesn't fix up |
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2234 // vtables in the shared system dictionary, only the main one. |
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2235 // It also redefines the itable too so fix that too. |
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2236 ResourceMark rm(THREAD); |
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2237 ik->vtable()->initialize_vtable(false, CHECK); |
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2238 ik->itable()->initialize_itable(false, CHECK); |
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2239 } |
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2240 |
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2241 // Allocate a simple java object for a lock. |
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2242 // This needs to be a java object because during class initialization |
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2243 // it can be held across a java call. |
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2244 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK); |
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2245 Handle h(THREAD, (oop)r); |
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2246 ik->set_init_lock(h()); |
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2247 |
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2248 // restore constant pool resolved references |
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2249 ik->constants()->restore_unshareable_info(CHECK); |
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2250 |
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2251 ik->array_klasses_do(restore_unshareable_in_class, CHECK); |
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2252 } |
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2253 |
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2254 static void clear_all_breakpoints(Method* m) { |
0 | 2255 m->clear_all_breakpoints(); |
2256 } | |
2257 | |
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2258 void InstanceKlass::release_C_heap_structures() { |
0 | 2259 // Deallocate oop map cache |
2260 if (_oop_map_cache != NULL) { | |
2261 delete _oop_map_cache; | |
2262 _oop_map_cache = NULL; | |
2263 } | |
2264 | |
2265 // Deallocate JNI identifiers for jfieldIDs | |
2266 JNIid::deallocate(jni_ids()); | |
2267 set_jni_ids(NULL); | |
2268 | |
2269 jmethodID* jmeths = methods_jmethod_ids_acquire(); | |
2270 if (jmeths != (jmethodID*)NULL) { | |
2271 release_set_methods_jmethod_ids(NULL); | |
2272 FreeHeap(jmeths); | |
2273 } | |
2274 | |
2275 int* indices = methods_cached_itable_indices_acquire(); | |
2276 if (indices != (int*)NULL) { | |
2277 release_set_methods_cached_itable_indices(NULL); | |
2278 FreeHeap(indices); | |
2279 } | |
2280 | |
2281 // release dependencies | |
2282 nmethodBucket* b = _dependencies; | |
2283 _dependencies = NULL; | |
2284 while (b != NULL) { | |
2285 nmethodBucket* next = b->next(); | |
2286 delete b; | |
2287 b = next; | |
2288 } | |
2289 | |
2290 // Deallocate breakpoint records | |
2291 if (breakpoints() != 0x0) { | |
2292 methods_do(clear_all_breakpoints); | |
2293 assert(breakpoints() == 0x0, "should have cleared breakpoints"); | |
2294 } | |
2295 | |
2296 // deallocate information about previous versions | |
2297 if (_previous_versions != NULL) { | |
2298 for (int i = _previous_versions->length() - 1; i >= 0; i--) { | |
2299 PreviousVersionNode * pv_node = _previous_versions->at(i); | |
2300 delete pv_node; | |
2301 } | |
2302 delete _previous_versions; | |
2303 _previous_versions = NULL; | |
2304 } | |
2305 | |
2306 // deallocate the cached class file | |
2307 if (_cached_class_file_bytes != NULL) { | |
6197 | 2308 os::free(_cached_class_file_bytes, mtClass); |
0 | 2309 _cached_class_file_bytes = NULL; |
2310 _cached_class_file_len = 0; | |
2311 } | |
2177
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2312 |
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2313 // Decrement symbol reference counts associated with the unloaded class. |
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2314 if (_name != NULL) _name->decrement_refcount(); |
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2315 // unreference array name derived from this class name (arrays of an unloaded |
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2316 // class can't be referenced anymore). |
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2317 if (_array_name != NULL) _array_name->decrement_refcount(); |
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2318 if (_source_file_name != NULL) _source_file_name->decrement_refcount(); |
6203
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2319 if (_source_debug_extension != NULL) FREE_C_HEAP_ARRAY(char, _source_debug_extension, mtClass); |
2177
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2320 } |
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2321 |
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2322 void InstanceKlass::set_source_file_name(Symbol* n) { |
2177
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2323 _source_file_name = n; |
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2324 if (_source_file_name != NULL) _source_file_name->increment_refcount(); |
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2325 } |
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2326 |
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2327 void InstanceKlass::set_source_debug_extension(char* array, int length) { |
6203
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2328 if (array == NULL) { |
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2329 _source_debug_extension = NULL; |
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2330 } else { |
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2331 // Adding one to the attribute length in order to store a null terminator |
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2332 // character could cause an overflow because the attribute length is |
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2333 // already coded with an u4 in the classfile, but in practice, it's |
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2334 // unlikely to happen. |
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2335 assert((length+1) > length, "Overflow checking"); |
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2336 char* sde = NEW_C_HEAP_ARRAY(char, (length + 1), mtClass); |
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2337 for (int i = 0; i < length; i++) { |
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2338 sde[i] = array[i]; |
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2339 } |
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2340 sde[length] = '\0'; |
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2341 _source_debug_extension = sde; |
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2342 } |
0 | 2343 } |
2344 | |
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2345 address InstanceKlass::static_field_addr(int offset) { |
6735
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|
2346 return (address)(offset + InstanceMirrorKlass::offset_of_static_fields() + (intptr_t)java_mirror()); |
2376
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|
2347 } |
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|
2348 |
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|
2349 |
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2350 const char* InstanceKlass::signature_name() const { |
0 | 2351 const char* src = (const char*) (name()->as_C_string()); |
2352 const int src_length = (int)strlen(src); | |
2353 char* dest = NEW_RESOURCE_ARRAY(char, src_length + 3); | |
2354 int src_index = 0; | |
2355 int dest_index = 0; | |
2356 dest[dest_index++] = 'L'; | |
2357 while (src_index < src_length) { | |
2358 dest[dest_index++] = src[src_index++]; | |
2359 } | |
2360 dest[dest_index++] = ';'; | |
2361 dest[dest_index] = '\0'; | |
2362 return dest; | |
2363 } | |
2364 | |
2365 // different verisons of is_same_class_package | |
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2366 bool InstanceKlass::is_same_class_package(Klass* class2) { |
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2367 Klass* class1 = this; |
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2368 oop classloader1 = InstanceKlass::cast(class1)->class_loader(); |
6983 | 2369 Symbol* classname1 = class1->name(); |
2370 | |
2371 if (class2->oop_is_objArray()) { | |
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2372 class2 = ObjArrayKlass::cast(class2)->bottom_klass(); |
0 | 2373 } |
2374 oop classloader2; | |
6983 | 2375 if (class2->oop_is_instance()) { |
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2376 classloader2 = InstanceKlass::cast(class2)->class_loader(); |
0 | 2377 } else { |
6983 | 2378 assert(class2->oop_is_typeArray(), "should be type array"); |
0 | 2379 classloader2 = NULL; |
2380 } | |
6983 | 2381 Symbol* classname2 = class2->name(); |
0 | 2382 |
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2383 return InstanceKlass::is_same_class_package(classloader1, classname1, |
0 | 2384 classloader2, classname2); |
2385 } | |
2386 | |
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2387 bool InstanceKlass::is_same_class_package(oop classloader2, Symbol* classname2) { |
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2388 Klass* class1 = this; |
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2389 oop classloader1 = InstanceKlass::cast(class1)->class_loader(); |
6983 | 2390 Symbol* classname1 = class1->name(); |
0 | 2391 |
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2392 return InstanceKlass::is_same_class_package(classloader1, classname1, |
0 | 2393 classloader2, classname2); |
2394 } | |
2395 | |
2396 // return true if two classes are in the same package, classloader | |
2397 // and classname information is enough to determine a class's package | |
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2398 bool InstanceKlass::is_same_class_package(oop class_loader1, Symbol* class_name1, |
2177
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2399 oop class_loader2, Symbol* class_name2) { |
0 | 2400 if (class_loader1 != class_loader2) { |
2401 return false; | |
665
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2402 } else if (class_name1 == class_name2) { |
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2403 return true; // skip painful bytewise comparison |
0 | 2404 } else { |
2405 ResourceMark rm; | |
2406 | |
2177
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6990754: Use native memory and reference counting to implement SymbolTable
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|
2407 // The Symbol*'s are in UTF8 encoding. Since we only need to check explicitly |
0 | 2408 // for ASCII characters ('/', 'L', '['), we can keep them in UTF8 encoding. |
2409 // Otherwise, we just compare jbyte values between the strings. | |
2177
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2410 const jbyte *name1 = class_name1->base(); |
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|
2411 const jbyte *name2 = class_name2->base(); |
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|
2412 |
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|
2413 const jbyte *last_slash1 = UTF8::strrchr(name1, class_name1->utf8_length(), '/'); |
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diff
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|
2414 const jbyte *last_slash2 = UTF8::strrchr(name2, class_name2->utf8_length(), '/'); |
0 | 2415 |
2416 if ((last_slash1 == NULL) || (last_slash2 == NULL)) { | |
2417 // One of the two doesn't have a package. Only return true | |
2418 // if the other one also doesn't have a package. | |
2419 return last_slash1 == last_slash2; | |
2420 } else { | |
2421 // Skip over '['s | |
2422 if (*name1 == '[') { | |
2423 do { | |
2424 name1++; | |
2425 } while (*name1 == '['); | |
2426 if (*name1 != 'L') { | |
2427 // Something is terribly wrong. Shouldn't be here. | |
2428 return false; | |
2429 } | |
2430 } | |
2431 if (*name2 == '[') { | |
2432 do { | |
2433 name2++; | |
2434 } while (*name2 == '['); | |
2435 if (*name2 != 'L') { | |
2436 // Something is terribly wrong. Shouldn't be here. | |
2437 return false; | |
2438 } | |
2439 } | |
2440 | |
2441 // Check that package part is identical | |
2442 int length1 = last_slash1 - name1; | |
2443 int length2 = last_slash2 - name2; | |
2444 | |
2445 return UTF8::equal(name1, length1, name2, length2); | |
2446 } | |
2447 } | |
2448 } | |
2449 | |
652
4aaa9f5e02a8
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parents:
605
diff
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|
2450 // Returns true iff super_method can be overridden by a method in targetclassname |
4aaa9f5e02a8
4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
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diff
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|
2451 // See JSL 3rd edition 8.4.6.1 |
4aaa9f5e02a8
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acorn
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diff
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|
2452 // Assumes name-signature match |
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2453 // "this" is InstanceKlass of super_method which must exist |
da91efe96a93
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|
2454 // note that the InstanceKlass of the method in the targetclassname has not always been created yet |
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|
2455 bool InstanceKlass::is_override(methodHandle super_method, Handle targetclassloader, Symbol* targetclassname, TRAPS) { |
652
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diff
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|
2456 // Private methods can not be overridden |
4aaa9f5e02a8
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diff
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|
2457 if (super_method->is_private()) { |
4aaa9f5e02a8
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diff
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|
2458 return false; |
4aaa9f5e02a8
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acorn
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diff
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|
2459 } |
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parents:
605
diff
changeset
|
2460 // If super method is accessible, then override |
4aaa9f5e02a8
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acorn
parents:
605
diff
changeset
|
2461 if ((super_method->is_protected()) || |
4aaa9f5e02a8
4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
acorn
parents:
605
diff
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|
2462 (super_method->is_public())) { |
4aaa9f5e02a8
4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
acorn
parents:
605
diff
changeset
|
2463 return true; |
4aaa9f5e02a8
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acorn
parents:
605
diff
changeset
|
2464 } |
4aaa9f5e02a8
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parents:
605
diff
changeset
|
2465 // Package-private methods are not inherited outside of package |
4aaa9f5e02a8
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acorn
parents:
605
diff
changeset
|
2466 assert(super_method->is_package_private(), "must be package private"); |
2177
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6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
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diff
changeset
|
2467 return(is_same_class_package(targetclassloader(), targetclassname)); |
652
4aaa9f5e02a8
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605
diff
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|
2468 } |
0 | 2469 |
665
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6814659: separable cleanups and subroutines for 6655638
jrose
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diff
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|
2470 /* defined for now in jvm.cpp, for historical reasons *-- |
6725
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6964458: Reimplement class meta-data storage to use native memory
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|
2471 Klass* InstanceKlass::compute_enclosing_class_impl(instanceKlassHandle self, |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
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1972
diff
changeset
|
2472 Symbol*& simple_name_result, TRAPS) { |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2473 ... |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
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diff
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|
2474 } |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
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diff
changeset
|
2475 */ |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
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diff
changeset
|
2476 |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
changeset
|
2477 // tell if two classes have the same enclosing class (at package level) |
6725
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6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
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|
2478 bool InstanceKlass::is_same_package_member_impl(instanceKlassHandle class1, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
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|
2479 Klass* class2_oop, TRAPS) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
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|
2480 if (class2_oop == class1()) return true; |
6983 | 2481 if (!class2_oop->oop_is_instance()) return false; |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
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|
2482 instanceKlassHandle class2(THREAD, class2_oop); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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diff
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|
2483 |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
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|
2484 // must be in same package before we try anything else |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
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|
2485 if (!class1->is_same_class_package(class2->class_loader(), class2->name())) |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
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|
2486 return false; |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
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605
diff
changeset
|
2487 |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
changeset
|
2488 // As long as there is an outer1.getEnclosingClass, |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2489 // shift the search outward. |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
changeset
|
2490 instanceKlassHandle outer1 = class1; |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
changeset
|
2491 for (;;) { |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
changeset
|
2492 // As we walk along, look for equalities between outer1 and class2. |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2493 // Eventually, the walks will terminate as outer1 stops |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
changeset
|
2494 // at the top-level class around the original class. |
1126
933a3e806ce6
6895168: JCK api/signaturetest/sigtest.basic.html#basic test fails for jdk 5.0 with HS 16 in nightly build
xlu
parents:
1039
diff
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|
2495 bool ignore_inner_is_member; |
6725
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coleenp
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|
2496 Klass* next = outer1->compute_enclosing_class(&ignore_inner_is_member, |
1126
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6895168: JCK api/signaturetest/sigtest.basic.html#basic test fails for jdk 5.0 with HS 16 in nightly build
xlu
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1039
diff
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|
2497 CHECK_false); |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
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605
diff
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|
2498 if (next == NULL) break; |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
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605
diff
changeset
|
2499 if (next == class2()) return true; |
c89f86385056
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diff
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|
2500 outer1 = instanceKlassHandle(THREAD, next); |
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diff
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|
2501 } |
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diff
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|
2502 |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
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diff
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|
2503 // Now do the same for class2. |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
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diff
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|
2504 instanceKlassHandle outer2 = class2; |
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diff
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|
2505 for (;;) { |
1126
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xlu
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1039
diff
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|
2506 bool ignore_inner_is_member; |
6725
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|
2507 Klass* next = outer2->compute_enclosing_class(&ignore_inner_is_member, |
1126
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diff
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|
2508 CHECK_false); |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
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605
diff
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|
2509 if (next == NULL) break; |
c89f86385056
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605
diff
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|
2510 // Might as well check the new outer against all available values. |
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6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
changeset
|
2511 if (next == class1()) return true; |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
changeset
|
2512 if (next == outer1()) return true; |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
changeset
|
2513 outer2 = instanceKlassHandle(THREAD, next); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
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|
2514 } |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
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605
diff
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|
2515 |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
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|
2516 // If by this point we have not found an equality between the |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
changeset
|
2517 // two classes, we know they are in separate package members. |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
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parents:
605
diff
changeset
|
2518 return false; |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
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|
2519 } |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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diff
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|
2520 |
0 | 2521 |
6725
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coleenp
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6266
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|
2522 jint InstanceKlass::compute_modifier_flags(TRAPS) const { |
0 | 2523 jint access = access_flags().as_int(); |
2524 | |
2525 // But check if it happens to be member class. | |
6725
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coleenp
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6266
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|
2526 instanceKlassHandle ik(THREAD, this); |
5967
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
diff
changeset
|
2527 InnerClassesIterator iter(ik); |
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
diff
changeset
|
2528 for (; !iter.done(); iter.next()) { |
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
diff
changeset
|
2529 int ioff = iter.inner_class_info_index(); |
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
diff
changeset
|
2530 // Inner class attribute can be zero, skip it. |
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
diff
changeset
|
2531 // Strange but true: JVM spec. allows null inner class refs. |
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
diff
changeset
|
2532 if (ioff == 0) continue; |
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2533 |
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2534 // only look at classes that are already loaded |
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2535 // since we are looking for the flags for our self. |
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2536 Symbol* inner_name = ik->constants()->klass_name_at(ioff); |
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2537 if ((ik->name() == inner_name)) { |
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2538 // This is really a member class. |
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2539 access = iter.inner_access_flags(); |
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2540 break; |
0 | 2541 } |
2542 } | |
2543 // Remember to strip ACC_SUPER bit | |
2544 return (access & (~JVM_ACC_SUPER)) & JVM_ACC_WRITTEN_FLAGS; | |
2545 } | |
2546 | |
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2547 jint InstanceKlass::jvmti_class_status() const { |
0 | 2548 jint result = 0; |
2549 | |
2550 if (is_linked()) { | |
2551 result |= JVMTI_CLASS_STATUS_VERIFIED | JVMTI_CLASS_STATUS_PREPARED; | |
2552 } | |
2553 | |
2554 if (is_initialized()) { | |
2555 assert(is_linked(), "Class status is not consistent"); | |
2556 result |= JVMTI_CLASS_STATUS_INITIALIZED; | |
2557 } | |
2558 if (is_in_error_state()) { | |
2559 result |= JVMTI_CLASS_STATUS_ERROR; | |
2560 } | |
2561 return result; | |
2562 } | |
2563 | |
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2564 Method* InstanceKlass::method_at_itable(Klass* holder, int index, TRAPS) { |
0 | 2565 itableOffsetEntry* ioe = (itableOffsetEntry*)start_of_itable(); |
2566 int method_table_offset_in_words = ioe->offset()/wordSize; | |
2567 int nof_interfaces = (method_table_offset_in_words - itable_offset_in_words()) | |
2568 / itableOffsetEntry::size(); | |
2569 | |
2570 for (int cnt = 0 ; ; cnt ++, ioe ++) { | |
605 | 2571 // If the interface isn't implemented by the receiver class, |
0 | 2572 // the VM should throw IncompatibleClassChangeError. |
2573 if (cnt >= nof_interfaces) { | |
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2574 THROW_NULL(vmSymbols::java_lang_IncompatibleClassChangeError()); |
0 | 2575 } |
2576 | |
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2577 Klass* ik = ioe->interface_klass(); |
0 | 2578 if (ik == holder) break; |
2579 } | |
2580 | |
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2581 itableMethodEntry* ime = ioe->first_method_entry(this); |
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2582 Method* m = ime[index].method(); |
0 | 2583 if (m == NULL) { |
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2584 THROW_NULL(vmSymbols::java_lang_AbstractMethodError()); |
0 | 2585 } |
2586 return m; | |
2587 } | |
2588 | |
2589 // On-stack replacement stuff | |
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2590 void InstanceKlass::add_osr_nmethod(nmethod* n) { |
0 | 2591 // only one compilation can be active |
2592 NEEDS_CLEANUP | |
2593 // This is a short non-blocking critical region, so the no safepoint check is ok. | |
2594 OsrList_lock->lock_without_safepoint_check(); | |
2595 assert(n->is_osr_method(), "wrong kind of nmethod"); | |
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2596 n->set_osr_link(osr_nmethods_head()); |
0 | 2597 set_osr_nmethods_head(n); |
1783 | 2598 // Raise the highest osr level if necessary |
2599 if (TieredCompilation) { | |
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2600 Method* m = n->method(); |
1783 | 2601 m->set_highest_osr_comp_level(MAX2(m->highest_osr_comp_level(), n->comp_level())); |
2602 } | |
0 | 2603 // Remember to unlock again |
2604 OsrList_lock->unlock(); | |
1783 | 2605 |
2606 // Get rid of the osr methods for the same bci that have lower levels. | |
2607 if (TieredCompilation) { | |
2608 for (int l = CompLevel_limited_profile; l < n->comp_level(); l++) { | |
2609 nmethod *inv = lookup_osr_nmethod(n->method(), n->osr_entry_bci(), l, true); | |
2610 if (inv != NULL && inv->is_in_use()) { | |
2611 inv->make_not_entrant(); | |
2612 } | |
2613 } | |
2614 } | |
0 | 2615 } |
2616 | |
2617 | |
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2618 void InstanceKlass::remove_osr_nmethod(nmethod* n) { |
0 | 2619 // This is a short non-blocking critical region, so the no safepoint check is ok. |
2620 OsrList_lock->lock_without_safepoint_check(); | |
2621 assert(n->is_osr_method(), "wrong kind of nmethod"); | |
2622 nmethod* last = NULL; | |
2623 nmethod* cur = osr_nmethods_head(); | |
1783 | 2624 int max_level = CompLevel_none; // Find the max comp level excluding n |
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2625 Method* m = n->method(); |
0 | 2626 // Search for match |
2627 while(cur != NULL && cur != n) { | |
1783 | 2628 if (TieredCompilation) { |
2629 // Find max level before n | |
2630 max_level = MAX2(max_level, cur->comp_level()); | |
2631 } | |
0 | 2632 last = cur; |
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2633 cur = cur->osr_link(); |
0 | 2634 } |
1783 | 2635 nmethod* next = NULL; |
0 | 2636 if (cur == n) { |
1783 | 2637 next = cur->osr_link(); |
0 | 2638 if (last == NULL) { |
2639 // Remove first element | |
1783 | 2640 set_osr_nmethods_head(next); |
0 | 2641 } else { |
1783 | 2642 last->set_osr_link(next); |
0 | 2643 } |
2644 } | |
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2645 n->set_osr_link(NULL); |
1783 | 2646 if (TieredCompilation) { |
2647 cur = next; | |
2648 while (cur != NULL) { | |
2649 // Find max level after n | |
2650 max_level = MAX2(max_level, cur->comp_level()); | |
2651 cur = cur->osr_link(); | |
2652 } | |
2653 m->set_highest_osr_comp_level(max_level); | |
2654 } | |
0 | 2655 // Remember to unlock again |
2656 OsrList_lock->unlock(); | |
2657 } | |
2658 | |
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2659 nmethod* InstanceKlass::lookup_osr_nmethod(Method* const m, int bci, int comp_level, bool match_level) const { |
0 | 2660 // This is a short non-blocking critical region, so the no safepoint check is ok. |
2661 OsrList_lock->lock_without_safepoint_check(); | |
2662 nmethod* osr = osr_nmethods_head(); | |
1783 | 2663 nmethod* best = NULL; |
0 | 2664 while (osr != NULL) { |
2665 assert(osr->is_osr_method(), "wrong kind of nmethod found in chain"); | |
1783 | 2666 // There can be a time when a c1 osr method exists but we are waiting |
2667 // for a c2 version. When c2 completes its osr nmethod we will trash | |
2668 // the c1 version and only be able to find the c2 version. However | |
2669 // while we overflow in the c1 code at back branches we don't want to | |
2670 // try and switch to the same code as we are already running | |
2671 | |
0 | 2672 if (osr->method() == m && |
2673 (bci == InvocationEntryBci || osr->osr_entry_bci() == bci)) { | |
1783 | 2674 if (match_level) { |
2675 if (osr->comp_level() == comp_level) { | |
2676 // Found a match - return it. | |
2677 OsrList_lock->unlock(); | |
2678 return osr; | |
2679 } | |
2680 } else { | |
2681 if (best == NULL || (osr->comp_level() > best->comp_level())) { | |
2682 if (osr->comp_level() == CompLevel_highest_tier) { | |
2683 // Found the best possible - return it. | |
2684 OsrList_lock->unlock(); | |
2685 return osr; | |
2686 } | |
2687 best = osr; | |
2688 } | |
2689 } | |
0 | 2690 } |
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2691 osr = osr->osr_link(); |
0 | 2692 } |
2693 OsrList_lock->unlock(); | |
1783 | 2694 if (best != NULL && best->comp_level() >= comp_level && match_level == false) { |
2695 return best; | |
2696 } | |
0 | 2697 return NULL; |
2698 } | |
2699 | |
2700 // ----------------------------------------------------------------------------------------------------- | |
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2701 // Printing |
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2702 |
0 | 2703 #ifndef PRODUCT |
2704 | |
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2705 #define BULLET " - " |
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2706 |
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2707 static const char* state_names[] = { |
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2708 "allocated", "loaded", "linked", "being_initialized", "fully_initialized", "initialization_error" |
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2709 }; |
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2710 |
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2711 void InstanceKlass::print_on(outputStream* st) const { |
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2712 assert(is_klass(), "must be klass"); |
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2713 Klass::print_on(st); |
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2714 |
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2715 st->print(BULLET"instance size: %d", size_helper()); st->cr(); |
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2716 st->print(BULLET"klass size: %d", size()); st->cr(); |
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2717 st->print(BULLET"access: "); access_flags().print_on(st); st->cr(); |
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2718 st->print(BULLET"state: "); st->print_cr(state_names[_init_state]); |
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2719 st->print(BULLET"name: "); name()->print_value_on(st); st->cr(); |
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2720 st->print(BULLET"super: "); super()->print_value_on_maybe_null(st); st->cr(); |
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2721 st->print(BULLET"sub: "); |
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2722 Klass* sub = subklass(); |
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2723 int n; |
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2724 for (n = 0; sub != NULL; n++, sub = sub->next_sibling()) { |
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2725 if (n < MaxSubklassPrintSize) { |
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2726 sub->print_value_on(st); |
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2727 st->print(" "); |
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2728 } |
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2729 } |
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2730 if (n >= MaxSubklassPrintSize) st->print("(%d more klasses...)", n - MaxSubklassPrintSize); |
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2731 st->cr(); |
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2732 |
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2733 if (is_interface()) { |
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2734 st->print_cr(BULLET"nof implementors: %d", nof_implementors()); |
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2735 if (nof_implementors() == 1) { |
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2736 st->print_cr(BULLET"implementor: "); |
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2737 st->print(" "); |
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2738 implementor()->print_value_on(st); |
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2739 st->cr(); |
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2740 } |
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2741 } |
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2742 |
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2743 st->print(BULLET"arrays: "); array_klasses()->print_value_on_maybe_null(st); st->cr(); |
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2744 st->print(BULLET"methods: "); methods()->print_value_on(st); st->cr(); |
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2745 if (Verbose) { |
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2746 Array<Method*>* method_array = methods(); |
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2747 for(int i = 0; i < method_array->length(); i++) { |
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2748 st->print("%d : ", i); method_array->at(i)->print_value(); st->cr(); |
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2749 } |
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2750 } |
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2751 st->print(BULLET"method ordering: "); method_ordering()->print_value_on(st); st->cr(); |
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2752 st->print(BULLET"local interfaces: "); local_interfaces()->print_value_on(st); st->cr(); |
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2753 st->print(BULLET"trans. interfaces: "); transitive_interfaces()->print_value_on(st); st->cr(); |
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2754 st->print(BULLET"constants: "); constants()->print_value_on(st); st->cr(); |
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2755 if (class_loader_data() != NULL) { |
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2756 st->print(BULLET"class loader data: "); |
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2757 class_loader_data()->print_value_on(st); |
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2758 st->cr(); |
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2759 } |
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2760 st->print(BULLET"protection domain: "); ((InstanceKlass*)this)->protection_domain()->print_value_on(st); st->cr(); |
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2761 st->print(BULLET"host class: "); host_klass()->print_value_on_maybe_null(st); st->cr(); |
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2762 st->print(BULLET"signers: "); signers()->print_value_on(st); st->cr(); |
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2763 st->print(BULLET"init_lock: "); ((oop)init_lock())->print_value_on(st); st->cr(); |
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2764 if (source_file_name() != NULL) { |
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2765 st->print(BULLET"source file: "); |
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2766 source_file_name()->print_value_on(st); |
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2767 st->cr(); |
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|
2768 } |
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2769 if (source_debug_extension() != NULL) { |
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2770 st->print(BULLET"source debug extension: "); |
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2771 st->print("%s", source_debug_extension()); |
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2772 st->cr(); |
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2773 } |
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2774 st->print(BULLET"annotations: "); annotations()->print_value_on(st); st->cr(); |
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2775 { |
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2776 ResourceMark rm; |
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2777 // PreviousVersionInfo objects returned via PreviousVersionWalker |
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2778 // contain a GrowableArray of handles. We have to clean up the |
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2779 // GrowableArray _after_ the PreviousVersionWalker destructor |
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2780 // has destroyed the handles. |
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|
2781 { |
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|
2782 bool have_pv = false; |
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|
2783 PreviousVersionWalker pvw((InstanceKlass*)this); |
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2784 for (PreviousVersionInfo * pv_info = pvw.next_previous_version(); |
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2785 pv_info != NULL; pv_info = pvw.next_previous_version()) { |
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2786 if (!have_pv) |
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2787 st->print(BULLET"previous version: "); |
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2788 have_pv = true; |
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2789 pv_info->prev_constant_pool_handle()()->print_value_on(st); |
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|
2790 } |
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|
2791 if (have_pv) st->cr(); |
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2792 } // pvw is cleaned up |
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2793 } // rm is cleaned up |
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|
2794 |
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|
2795 if (generic_signature() != NULL) { |
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|
2796 st->print(BULLET"generic signature: "); |
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|
2797 generic_signature()->print_value_on(st); |
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|
2798 st->cr(); |
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|
2799 } |
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2800 st->print(BULLET"inner classes: "); inner_classes()->print_value_on(st); st->cr(); |
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2801 st->print(BULLET"java mirror: "); java_mirror()->print_value_on(st); st->cr(); |
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2802 st->print(BULLET"vtable length %d (start addr: " INTPTR_FORMAT ")", vtable_length(), start_of_vtable()); st->cr(); |
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2803 st->print(BULLET"itable length %d (start addr: " INTPTR_FORMAT ")", itable_length(), start_of_itable()); st->cr(); |
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|
2804 st->print_cr(BULLET"---- static fields (%d words):", static_field_size()); |
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|
2805 FieldPrinter print_static_field(st); |
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|
2806 ((InstanceKlass*)this)->do_local_static_fields(&print_static_field); |
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2807 st->print_cr(BULLET"---- non-static fields (%d words):", nonstatic_field_size()); |
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|
2808 FieldPrinter print_nonstatic_field(st); |
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|
2809 ((InstanceKlass*)this)->do_nonstatic_fields(&print_nonstatic_field); |
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|
2810 |
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|
2811 st->print(BULLET"non-static oop maps: "); |
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|
2812 OopMapBlock* map = start_of_nonstatic_oop_maps(); |
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|
2813 OopMapBlock* end_map = map + nonstatic_oop_map_count(); |
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|
2814 while (map < end_map) { |
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|
2815 st->print("%d-%d ", map->offset(), map->offset() + heapOopSize*(map->count() - 1)); |
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|
2816 map++; |
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|
2817 } |
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|
2818 st->cr(); |
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|
2819 } |
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|
2820 |
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|
2821 #endif //PRODUCT |
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|
2822 |
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|
2823 void InstanceKlass::print_value_on(outputStream* st) const { |
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|
2824 assert(is_klass(), "must be klass"); |
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|
2825 name()->print_value_on(st); |
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|
2826 } |
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|
2827 |
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|
2828 #ifndef PRODUCT |
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|
2829 |
0 | 2830 void FieldPrinter::do_field(fieldDescriptor* fd) { |
665
c89f86385056
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jrose
parents:
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diff
changeset
|
2831 _st->print(BULLET); |
2376
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
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parents:
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diff
changeset
|
2832 if (_obj == NULL) { |
0 | 2833 fd->print_on(_st); |
2834 _st->cr(); | |
2835 } else { | |
2836 fd->print_on_for(_st, _obj); | |
2837 _st->cr(); | |
2838 } | |
2839 } | |
2840 | |
2841 | |
6725
da91efe96a93
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coleenp
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|
2842 void InstanceKlass::oop_print_on(oop obj, outputStream* st) { |
0 | 2843 Klass::oop_print_on(obj, st); |
2844 | |
6725
da91efe96a93
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|
2845 if (this == SystemDictionary::String_klass()) { |
0 | 2846 typeArrayOop value = java_lang_String::value(obj); |
2847 juint offset = java_lang_String::offset(obj); | |
2848 juint length = java_lang_String::length(obj); | |
2849 if (value != NULL && | |
2850 value->is_typeArray() && | |
2851 offset <= (juint) value->length() && | |
2852 offset + length <= (juint) value->length()) { | |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
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parents:
605
diff
changeset
|
2853 st->print(BULLET"string: "); |
0 | 2854 Handle h_obj(obj); |
2855 java_lang_String::print(h_obj, st); | |
2856 st->cr(); | |
2857 if (!WizardMode) return; // that is enough | |
2858 } | |
2859 } | |
2860 | |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2861 st->print_cr(BULLET"---- fields (total size %d words):", oop_size(obj)); |
2376
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2357
diff
changeset
|
2862 FieldPrinter print_field(st, obj); |
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2357
diff
changeset
|
2863 do_nonstatic_fields(&print_field); |
0 | 2864 |
6725
da91efe96a93
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changeset
|
2865 if (this == SystemDictionary::Class_klass()) { |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2866 st->print(BULLET"signature: "); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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diff
changeset
|
2867 java_lang_Class::print_signature(obj, st); |
c89f86385056
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jrose
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diff
changeset
|
2868 st->cr(); |
6725
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changeset
|
2869 Klass* mirrored_klass = java_lang_Class::as_Klass(obj); |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2870 st->print(BULLET"fake entry for mirror: "); |
6725
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changeset
|
2871 mirrored_klass->print_value_on_maybe_null(st); |
0 | 2872 st->cr(); |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
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diff
changeset
|
2873 st->print(BULLET"fake entry resolved_constructor: "); |
6725
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|
2874 Method* ctor = java_lang_Class::resolved_constructor(obj); |
da91efe96a93
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|
2875 ctor->print_value_on_maybe_null(st); |
da91efe96a93
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|
2876 Klass* array_klass = java_lang_Class::array_klass(obj); |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2877 st->cr(); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
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605
diff
changeset
|
2878 st->print(BULLET"fake entry for array: "); |
6725
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diff
changeset
|
2879 array_klass->print_value_on_maybe_null(st); |
0 | 2880 st->cr(); |
2376
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7017732: move static fields into Class to prepare for perm gen removal
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2357
diff
changeset
|
2881 st->print_cr(BULLET"fake entry for oop_size: %d", java_lang_Class::oop_size(obj)); |
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
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parents:
2357
diff
changeset
|
2882 st->print_cr(BULLET"fake entry for static_oop_field_count: %d", java_lang_Class::static_oop_field_count(obj)); |
6725
da91efe96a93
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|
2883 Klass* real_klass = java_lang_Class::as_Klass(obj); |
da91efe96a93
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|
2884 if (real_klass != NULL && real_klass->oop_is_instance()) { |
da91efe96a93
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diff
changeset
|
2885 InstanceKlass::cast(real_klass)->do_local_static_fields(&print_field); |
2376
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never
parents:
2357
diff
changeset
|
2886 } |
6725
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|
2887 } else if (this == SystemDictionary::MethodType_klass()) { |
1039
987e948ebbc8
6815692: method handle code needs some cleanup (post-6655638)
jrose
parents:
997
diff
changeset
|
2888 st->print(BULLET"signature: "); |
2357
8033953d67ff
7012648: move JSR 292 to package java.lang.invoke and adjust names
jrose
parents:
2334
diff
changeset
|
2889 java_lang_invoke_MethodType::print_signature(obj, st); |
1039
987e948ebbc8
6815692: method handle code needs some cleanup (post-6655638)
jrose
parents:
997
diff
changeset
|
2890 st->cr(); |
0 | 2891 } |
2892 } | |
2893 | |
6948
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
2894 #endif |
1155
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1144
diff
changeset
|
2895 |
6725
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diff
changeset
|
2896 void InstanceKlass::oop_print_value_on(oop obj, outputStream* st) { |
0 | 2897 st->print("a "); |
2898 name()->print_value_on(st); | |
2899 obj->print_address_on(st); | |
6725
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diff
changeset
|
2900 if (this == SystemDictionary::String_klass() |
665
c89f86385056
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605
diff
changeset
|
2901 && java_lang_String::value(obj) != NULL) { |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2902 ResourceMark rm; |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
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parents:
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diff
changeset
|
2903 int len = java_lang_String::length(obj); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
changeset
|
2904 int plen = (len < 24 ? len : 12); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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diff
changeset
|
2905 char* str = java_lang_String::as_utf8_string(obj, 0, plen); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2906 st->print(" = \"%s\"", str); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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diff
changeset
|
2907 if (len > plen) |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
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diff
changeset
|
2908 st->print("...[%d]", len); |
6725
da91efe96a93
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diff
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|
2909 } else if (this == SystemDictionary::Class_klass()) { |
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2910 Klass* k = java_lang_Class::as_Klass(obj); |
665
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2911 st->print(" = "); |
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|
2912 if (k != NULL) { |
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6814659: separable cleanups and subroutines for 6655638
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|
2913 k->print_value_on(st); |
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|
2914 } else { |
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|
2915 const char* tname = type2name(java_lang_Class::primitive_type(obj)); |
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2916 st->print("%s", tname ? tname : "type?"); |
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2917 } |
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2918 } else if (this == SystemDictionary::MethodType_klass()) { |
1039
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2919 st->print(" = "); |
2357
8033953d67ff
7012648: move JSR 292 to package java.lang.invoke and adjust names
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2920 java_lang_invoke_MethodType::print_signature(obj, st); |
665
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2921 } else if (java_lang_boxing_object::is_instance(obj)) { |
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2922 st->print(" = "); |
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2923 java_lang_boxing_object::print(obj, st); |
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2924 } else if (this == SystemDictionary::LambdaForm_klass()) { |
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2925 oop vmentry = java_lang_invoke_LambdaForm::vmentry(obj); |
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|
2926 if (vmentry != NULL) { |
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|
2927 st->print(" => "); |
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|
2928 vmentry->print_value_on(st); |
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2929 } |
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2930 } else if (this == SystemDictionary::MemberName_klass()) { |
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2931 Metadata* vmtarget = java_lang_invoke_MemberName::vmtarget(obj); |
6266
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2932 if (vmtarget != NULL) { |
1d7922586cf6
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|
2933 st->print(" = "); |
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|
2934 vmtarget->print_value_on(st); |
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|
2935 } else { |
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|
2936 java_lang_invoke_MemberName::clazz(obj)->print_value_on(st); |
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|
2937 st->print("."); |
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|
2938 java_lang_invoke_MemberName::name(obj)->print_value_on(st); |
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2939 } |
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2940 } |
0 | 2941 } |
2942 | |
6725
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2943 const char* InstanceKlass::internal_name() const { |
0 | 2944 return external_name(); |
2945 } | |
2946 | |
2947 // Verification | |
2948 | |
2949 class VerifyFieldClosure: public OopClosure { | |
113
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2950 protected: |
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|
2951 template <class T> void do_oop_work(T* p) { |
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2952 oop obj = oopDesc::load_decode_heap_oop(p); |
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2953 if (!obj->is_oop_or_null()) { |
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|
2954 tty->print_cr("Failed: " PTR_FORMAT " -> " PTR_FORMAT, p, (address)obj); |
0 | 2955 Universe::print(); |
2956 guarantee(false, "boom"); | |
2957 } | |
2958 } | |
113
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|
2959 public: |
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|
2960 virtual void do_oop(oop* p) { VerifyFieldClosure::do_oop_work(p); } |
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2961 virtual void do_oop(narrowOop* p) { VerifyFieldClosure::do_oop_work(p); } |
0 | 2962 }; |
2963 | |
6725
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2964 void InstanceKlass::verify_on(outputStream* st) { |
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2965 Klass::verify_on(st); |
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2966 Thread *thread = Thread::current(); |
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|
2967 |
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|
2968 #ifndef PRODUCT |
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2969 // Avoid redundant verifies |
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2970 if (_verify_count == Universe::verify_count()) return; |
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2971 _verify_count = Universe::verify_count(); |
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2972 #endif |
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2973 // Verify that klass is present in SystemDictionary |
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2974 if (is_loaded() && !is_anonymous()) { |
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2975 Symbol* h_name = name(); |
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2976 SystemDictionary::verify_obj_klass_present(h_name, class_loader_data()); |
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|
2977 } |
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|
2978 |
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|
2979 // Verify static fields |
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|
2980 VerifyFieldClosure blk; |
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|
2981 |
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|
2982 // Verify vtables |
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|
2983 if (is_linked()) { |
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|
2984 ResourceMark rm(thread); |
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|
2985 // $$$ This used to be done only for m/s collections. Doing it |
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2986 // always seemed a valid generalization. (DLD -- 6/00) |
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|
2987 vtable()->verify(st); |
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|
2988 } |
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|
2989 |
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|
2990 // Verify first subklass |
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|
2991 if (subklass_oop() != NULL) { |
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|
2992 guarantee(subklass_oop()->is_metadata(), "should be in metaspace"); |
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|
2993 guarantee(subklass_oop()->is_klass(), "should be klass"); |
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|
2994 } |
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|
2995 |
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|
2996 // Verify siblings |
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|
2997 Klass* super = this->super(); |
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2998 Klass* sib = next_sibling(); |
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|
2999 if (sib != NULL) { |
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|
3000 if (sib == this) { |
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|
3001 fatal(err_msg("subclass points to itself " PTR_FORMAT, sib)); |
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|
3002 } |
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|
3003 |
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|
3004 guarantee(sib->is_metadata(), "should be in metaspace"); |
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|
3005 guarantee(sib->is_klass(), "should be klass"); |
da91efe96a93
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|
3006 guarantee(sib->super() == super, "siblings should have same superklass"); |
da91efe96a93
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|
3007 } |
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|
3008 |
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|
3009 // Verify implementor fields |
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|
3010 Klass* im = implementor(); |
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|
3011 if (im != NULL) { |
da91efe96a93
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|
3012 guarantee(is_interface(), "only interfaces should have implementor set"); |
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|
3013 guarantee(im->is_klass(), "should be klass"); |
6983 | 3014 guarantee(!im->is_interface() || im == this, |
6725
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|
3015 "implementors cannot be interfaces"); |
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|
3016 } |
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|
3017 |
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|
3018 // Verify local interfaces |
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|
3019 if (local_interfaces()) { |
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|
3020 Array<Klass*>* local_interfaces = this->local_interfaces(); |
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|
3021 for (int j = 0; j < local_interfaces->length(); j++) { |
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|
3022 Klass* e = local_interfaces->at(j); |
6983 | 3023 guarantee(e->is_klass() && e->is_interface(), "invalid local interface"); |
6725
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|
3024 } |
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|
3025 } |
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|
3026 |
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|
3027 // Verify transitive interfaces |
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|
3028 if (transitive_interfaces() != NULL) { |
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|
3029 Array<Klass*>* transitive_interfaces = this->transitive_interfaces(); |
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3030 for (int j = 0; j < transitive_interfaces->length(); j++) { |
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|
3031 Klass* e = transitive_interfaces->at(j); |
6983 | 3032 guarantee(e->is_klass() && e->is_interface(), "invalid transitive interface"); |
6725
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|
3033 } |
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|
3034 } |
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|
3035 |
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|
3036 // Verify methods |
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|
3037 if (methods() != NULL) { |
da91efe96a93
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|
3038 Array<Method*>* methods = this->methods(); |
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|
3039 for (int j = 0; j < methods->length(); j++) { |
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|
3040 guarantee(methods->at(j)->is_metadata(), "should be in metaspace"); |
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|
3041 guarantee(methods->at(j)->is_method(), "non-method in methods array"); |
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|
3042 } |
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|
3043 for (int j = 0; j < methods->length() - 1; j++) { |
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|
3044 Method* m1 = methods->at(j); |
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|
3045 Method* m2 = methods->at(j + 1); |
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|
3046 guarantee(m1->name()->fast_compare(m2->name()) <= 0, "methods not sorted correctly"); |
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3047 } |
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|
3048 } |
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|
3049 |
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3050 // Verify method ordering |
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3051 if (method_ordering() != NULL) { |
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3052 Array<int>* method_ordering = this->method_ordering(); |
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3053 int length = method_ordering->length(); |
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3054 if (JvmtiExport::can_maintain_original_method_order() || |
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3055 (UseSharedSpaces && length != 0)) { |
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3056 guarantee(length == methods()->length(), "invalid method ordering length"); |
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3057 jlong sum = 0; |
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3058 for (int j = 0; j < length; j++) { |
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3059 int original_index = method_ordering->at(j); |
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3060 guarantee(original_index >= 0, "invalid method ordering index"); |
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3061 guarantee(original_index < length, "invalid method ordering index"); |
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3062 sum += original_index; |
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|
3063 } |
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3064 // Verify sum of indices 0,1,...,length-1 |
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3065 guarantee(sum == ((jlong)length*(length-1))/2, "invalid method ordering sum"); |
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3066 } else { |
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3067 guarantee(length == 0, "invalid method ordering length"); |
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3068 } |
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|
3069 } |
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|
3070 |
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3071 // Verify JNI static field identifiers |
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3072 if (jni_ids() != NULL) { |
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3073 jni_ids()->verify(this); |
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3074 } |
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|
3075 |
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3076 // Verify other fields |
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3077 if (array_klasses() != NULL) { |
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3078 guarantee(array_klasses()->is_metadata(), "should be in metaspace"); |
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3079 guarantee(array_klasses()->is_klass(), "should be klass"); |
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|
3080 } |
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|
3081 if (constants() != NULL) { |
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3082 guarantee(constants()->is_metadata(), "should be in metaspace"); |
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3083 guarantee(constants()->is_constantPool(), "should be constant pool"); |
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|
3084 } |
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|
3085 if (protection_domain() != NULL) { |
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|
3086 guarantee(protection_domain()->is_oop(), "should be oop"); |
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|
3087 } |
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|
3088 if (host_klass() != NULL) { |
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|
3089 guarantee(host_klass()->is_metadata(), "should be in metaspace"); |
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3090 guarantee(host_klass()->is_klass(), "should be klass"); |
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|
3091 } |
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|
3092 if (signers() != NULL) { |
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|
3093 guarantee(signers()->is_objArray(), "should be obj array"); |
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|
3094 } |
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|
3095 } |
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|
3096 |
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|
3097 void InstanceKlass::oop_verify_on(oop obj, outputStream* st) { |
0 | 3098 Klass::oop_verify_on(obj, st); |
3099 VerifyFieldClosure blk; | |
6725
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3100 obj->oop_iterate_no_header(&blk); |
0 | 3101 } |
3102 | |
6725
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3103 |
113
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|
3104 // JNIid class for jfieldIDs only |
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|
3105 // Note to reviewers: |
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3106 // These JNI functions are just moved over to column 1 and not changed |
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|
3107 // in the compressed oops workspace. |
6725
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3108 JNIid::JNIid(Klass* holder, int offset, JNIid* next) { |
113
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|
3109 _holder = holder; |
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3110 _offset = offset; |
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|
3111 _next = next; |
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|
3112 debug_only(_is_static_field_id = false;) |
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|
3113 } |
0 | 3114 |
3115 | |
113
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|
3116 JNIid* JNIid::find(int offset) { |
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|
3117 JNIid* current = this; |
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|
3118 while (current != NULL) { |
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|
3119 if (current->offset() == offset) return current; |
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|
3120 current = current->next(); |
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diff
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|
3121 } |
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diff
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|
3122 return NULL; |
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diff
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|
3123 } |
0 | 3124 |
3125 void JNIid::deallocate(JNIid* current) { | |
113
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|
3126 while (current != NULL) { |
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diff
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|
3127 JNIid* next = current->next(); |
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diff
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|
3128 delete current; |
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diff
changeset
|
3129 current = next; |
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|
3130 } |
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diff
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|
3131 } |
0 | 3132 |
3133 | |
6725
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|
3134 void JNIid::verify(Klass* holder) { |
6735
aed758eda82a
7195833: NPG: Rename instanceClassLoaderKlass, instanceRefKlass and instanceMirrorKlass
coleenp
parents:
6733
diff
changeset
|
3135 int first_field_offset = InstanceMirrorKlass::offset_of_static_fields(); |
113
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|
3136 int end_field_offset; |
6725
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3137 end_field_offset = first_field_offset + (InstanceKlass::cast(holder)->static_field_size() * wordSize); |
0 | 3138 |
113
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|
3139 JNIid* current = this; |
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diff
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|
3140 while (current != NULL) { |
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diff
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|
3141 guarantee(current->holder() == holder, "Invalid klass in JNIid"); |
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diff
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|
3142 #ifdef ASSERT |
ba764ed4b6f2
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diff
changeset
|
3143 int o = current->offset(); |
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|
3144 if (current->is_static_field_id()) { |
ba764ed4b6f2
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diff
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|
3145 guarantee(o >= first_field_offset && o < end_field_offset, "Invalid static field offset in JNIid"); |
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diff
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|
3146 } |
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diff
changeset
|
3147 #endif |
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diff
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|
3148 current = current->next(); |
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diff
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|
3149 } |
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diff
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|
3150 } |
0 | 3151 |
3152 | |
3153 #ifdef ASSERT | |
6725
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|
3154 void InstanceKlass::set_init_state(ClassState state) { |
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|
3155 bool good_state = is_shared() ? (_init_state <= state) |
113
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|
3156 : (_init_state < state); |
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|
3157 assert(good_state || state == allocated, "illegal state transition"); |
4739
52b5d32fbfaf
7117052: instanceKlass::_init_state can be u1 type
coleenp
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4006
diff
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|
3158 _init_state = (u1)state; |
113
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|
3159 } |
0 | 3160 #endif |
3161 | |
3162 | |
3163 // RedefineClasses() support for previous versions: | |
3164 | |
6725
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|
3165 // Purge previous versions |
da91efe96a93
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|
3166 static void purge_previous_versions_internal(InstanceKlass* ik, int emcp_method_count) { |
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|
3167 if (ik->previous_versions() != NULL) { |
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|
3168 // This klass has previous versions so see what we can cleanup |
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|
3169 // while it is safe to do so. |
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|
3170 |
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|
3171 int deleted_count = 0; // leave debugging breadcrumbs |
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|
3172 int live_count = 0; |
da91efe96a93
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|
3173 ClassLoaderData* loader_data = ik->class_loader_data() == NULL ? |
da91efe96a93
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|
3174 ClassLoaderData::the_null_class_loader_data() : |
da91efe96a93
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|
3175 ik->class_loader_data(); |
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|
3176 |
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|
3177 // RC_TRACE macro has an embedded ResourceMark |
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|
3178 RC_TRACE(0x00000200, ("purge: %s: previous version length=%d", |
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|
3179 ik->external_name(), ik->previous_versions()->length())); |
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|
3180 |
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|
3181 for (int i = ik->previous_versions()->length() - 1; i >= 0; i--) { |
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|
3182 // check the previous versions array |
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|
3183 PreviousVersionNode * pv_node = ik->previous_versions()->at(i); |
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3184 ConstantPool* cp_ref = pv_node->prev_constant_pool(); |
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3185 assert(cp_ref != NULL, "cp ref was unexpectedly cleared"); |
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3186 |
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3187 ConstantPool* pvcp = cp_ref; |
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3188 if (!pvcp->on_stack()) { |
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3189 // If the constant pool isn't on stack, none of the methods |
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3190 // are executing. Delete all the methods, the constant pool and |
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3191 // and this previous version node. |
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3192 GrowableArray<Method*>* method_refs = pv_node->prev_EMCP_methods(); |
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3193 if (method_refs != NULL) { |
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3194 for (int j = method_refs->length() - 1; j >= 0; j--) { |
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3195 Method* method = method_refs->at(j); |
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3196 assert(method != NULL, "method ref was unexpectedly cleared"); |
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3197 method_refs->remove_at(j); |
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3198 // method will be freed with associated class. |
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3199 } |
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3200 } |
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3201 // Remove the constant pool |
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3202 delete pv_node; |
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3203 // Since we are traversing the array backwards, we don't have to |
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3204 // do anything special with the index. |
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3205 ik->previous_versions()->remove_at(i); |
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3206 deleted_count++; |
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3207 continue; |
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3208 } else { |
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3209 RC_TRACE(0x00000200, ("purge: previous version @%d is alive", i)); |
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3210 assert(pvcp->pool_holder() != NULL, "Constant pool with no holder"); |
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3211 guarantee (!loader_data->is_unloading(), "unloaded classes can't be on the stack"); |
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3212 live_count++; |
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3213 } |
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3214 |
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3215 // At least one method is live in this previous version, clean out |
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3216 // the others or mark them as obsolete. |
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3217 GrowableArray<Method*>* method_refs = pv_node->prev_EMCP_methods(); |
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3218 if (method_refs != NULL) { |
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3219 RC_TRACE(0x00000200, ("purge: previous methods length=%d", |
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3220 method_refs->length())); |
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3221 for (int j = method_refs->length() - 1; j >= 0; j--) { |
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3222 Method* method = method_refs->at(j); |
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3223 assert(method != NULL, "method ref was unexpectedly cleared"); |
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3224 |
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3225 // Remove the emcp method if it's not executing |
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3226 // If it's been made obsolete by a redefinition of a non-emcp |
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3227 // method, mark it as obsolete but leave it to clean up later. |
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3228 if (!method->on_stack()) { |
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3229 method_refs->remove_at(j); |
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3230 } else if (emcp_method_count == 0) { |
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3231 method->set_is_obsolete(); |
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3232 } else { |
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3233 // RC_TRACE macro has an embedded ResourceMark |
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3234 RC_TRACE(0x00000200, |
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3235 ("purge: %s(%s): prev method @%d in version @%d is alive", |
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3236 method->name()->as_C_string(), |
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3237 method->signature()->as_C_string(), j, i)); |
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3238 } |
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3239 } |
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3240 } |
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3241 } |
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3242 assert(ik->previous_versions()->length() == live_count, "sanity check"); |
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3243 RC_TRACE(0x00000200, |
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3244 ("purge: previous version stats: live=%d, deleted=%d", live_count, |
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3245 deleted_count)); |
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3246 } |
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3247 } |
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3248 |
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3249 // External interface for use during class unloading. |
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3250 void InstanceKlass::purge_previous_versions(InstanceKlass* ik) { |
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3251 // Call with >0 emcp methods since they are not currently being redefined. |
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3252 purge_previous_versions_internal(ik, 1); |
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3253 } |
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3254 |
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3255 |
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3256 // Potentially add an information node that contains pointers to the |
0 | 3257 // interesting parts of the previous version of the_class. |
6725
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3258 // This is also where we clean out any unused references. |
977
74a5db69c1fe
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|
3259 // Note that while we delete nodes from the _previous_versions |
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diff
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|
3260 // array, we never delete the array itself until the klass is |
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diff
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|
3261 // unloaded. The has_been_redefined() query depends on that fact. |
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|
3262 // |
6725
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3263 void InstanceKlass::add_previous_version(instanceKlassHandle ikh, |
113
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|
3264 BitMap* emcp_methods, int emcp_method_count) { |
0 | 3265 assert(Thread::current()->is_VM_thread(), |
113
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|
3266 "only VMThread can add previous versions"); |
0 | 3267 |
3268 if (_previous_versions == NULL) { | |
3269 // This is the first previous version so make some space. | |
3270 // Start with 2 elements under the assumption that the class | |
3271 // won't be redefined much. | |
6197 | 3272 _previous_versions = new (ResourceObj::C_HEAP, mtClass) |
0 | 3273 GrowableArray<PreviousVersionNode *>(2, true); |
3274 } | |
3275 | |
6725
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3276 ConstantPool* cp_ref = ikh->constants(); |
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3277 |
0 | 3278 // RC_TRACE macro has an embedded ResourceMark |
6725
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3279 RC_TRACE(0x00000400, ("adding previous version ref for %s @%d, EMCP_cnt=%d " |
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3280 "on_stack=%d", |
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3281 ikh->external_name(), _previous_versions->length(), emcp_method_count, |
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3282 cp_ref->on_stack())); |
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|
3283 |
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3284 // If the constant pool for this previous version of the class |
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3285 // is not marked as being on the stack, then none of the methods |
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3286 // in this previous version of the class are on the stack so |
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3287 // we don't need to create a new PreviousVersionNode. However, |
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3288 // we still need to examine older previous versions below. |
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3289 Array<Method*>* old_methods = ikh->methods(); |
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3290 |
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3291 if (cp_ref->on_stack()) { |
0 | 3292 PreviousVersionNode * pv_node = NULL; |
3293 if (emcp_method_count == 0) { | |
6725
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3294 // non-shared ConstantPool gets a reference |
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3295 pv_node = new PreviousVersionNode(cp_ref, !cp_ref->is_shared(), NULL); |
0 | 3296 RC_TRACE(0x00000400, |
6725
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3297 ("add: all methods are obsolete; flushing any EMCP refs")); |
0 | 3298 } else { |
3299 int local_count = 0; | |
6725
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3300 GrowableArray<Method*>* method_refs = new (ResourceObj::C_HEAP, mtClass) |
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3301 GrowableArray<Method*>(emcp_method_count, true); |
0 | 3302 for (int i = 0; i < old_methods->length(); i++) { |
3303 if (emcp_methods->at(i)) { | |
6725
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3304 // this old method is EMCP. Save it only if it's on the stack |
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3305 Method* old_method = old_methods->at(i); |
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3306 if (old_method->on_stack()) { |
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3307 method_refs->append(old_method); |
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|
3308 } |
0 | 3309 if (++local_count >= emcp_method_count) { |
3310 // no more EMCP methods so bail out now | |
3311 break; | |
3312 } | |
3313 } | |
3314 } | |
6725
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3315 // non-shared ConstantPool gets a reference |
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3316 pv_node = new PreviousVersionNode(cp_ref, !cp_ref->is_shared(), method_refs); |
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3317 } |
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3318 // append new previous version. |
0 | 3319 _previous_versions->append(pv_node); |
6725
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|
3320 } |
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|
3321 |
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|
3322 // Since the caller is the VMThread and we are at a safepoint, this |
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|
3323 // is a good time to clear out unused references. |
0 | 3324 |
3325 RC_TRACE(0x00000400, ("add: previous version length=%d", | |
3326 _previous_versions->length())); | |
3327 | |
6725
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3328 // Purge previous versions not executing on the stack |
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3329 purge_previous_versions_internal(this, emcp_method_count); |
0 | 3330 |
3331 int obsolete_method_count = old_methods->length() - emcp_method_count; | |
3332 | |
3333 if (emcp_method_count != 0 && obsolete_method_count != 0 && | |
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3334 _previous_versions->length() > 0) { |
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3335 // We have a mix of obsolete and EMCP methods so we have to |
0 | 3336 // clear out any matching EMCP method entries the hard way. |
3337 int local_count = 0; | |
3338 for (int i = 0; i < old_methods->length(); i++) { | |
3339 if (!emcp_methods->at(i)) { | |
3340 // only obsolete methods are interesting | |
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3341 Method* old_method = old_methods->at(i); |
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3342 Symbol* m_name = old_method->name(); |
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3343 Symbol* m_signature = old_method->signature(); |
0 | 3344 |
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3345 // we might not have added the last entry |
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3346 for (int j = _previous_versions->length() - 1; j >= 0; j--) { |
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3347 // check the previous versions array for non executing obsolete methods |
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3348 PreviousVersionNode * pv_node = _previous_versions->at(j); |
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3349 |
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3350 GrowableArray<Method*>* method_refs = pv_node->prev_EMCP_methods(); |
0 | 3351 if (method_refs == NULL) { |
3352 // We have run into a PreviousVersion generation where | |
3353 // all methods were made obsolete during that generation's | |
3354 // RedefineClasses() operation. At the time of that | |
3355 // operation, all EMCP methods were flushed so we don't | |
3356 // have to go back any further. | |
3357 // | |
3358 // A NULL method_refs is different than an empty method_refs. | |
3359 // We cannot infer any optimizations about older generations | |
3360 // from an empty method_refs for the current generation. | |
3361 break; | |
3362 } | |
3363 | |
3364 for (int k = method_refs->length() - 1; k >= 0; k--) { | |
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3365 Method* method = method_refs->at(k); |
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3366 |
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3367 if (!method->is_obsolete() && |
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3368 method->name() == m_name && |
0 | 3369 method->signature() == m_signature) { |
3370 // The current RedefineClasses() call has made all EMCP | |
3371 // versions of this method obsolete so mark it as obsolete | |
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3372 // and remove the reference. |
0 | 3373 RC_TRACE(0x00000400, |
3374 ("add: %s(%s): flush obsolete method @%d in version @%d", | |
3375 m_name->as_C_string(), m_signature->as_C_string(), k, j)); | |
3376 | |
3377 method->set_is_obsolete(); | |
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3378 // Leave obsolete methods on the previous version list to |
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3379 // clean up later. |
0 | 3380 break; |
3381 } | |
3382 } | |
3383 | |
3384 // The previous loop may not find a matching EMCP method, but | |
3385 // that doesn't mean that we can optimize and not go any | |
3386 // further back in the PreviousVersion generations. The EMCP | |
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3387 // method for this generation could have already been deleted, |
0 | 3388 // but there still may be an older EMCP method that has not |
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3389 // been deleted. |
0 | 3390 } |
3391 | |
3392 if (++local_count >= obsolete_method_count) { | |
3393 // no more obsolete methods so bail out now | |
3394 break; | |
3395 } | |
3396 } | |
3397 } | |
3398 } | |
3399 } // end add_previous_version() | |
3400 | |
3401 | |
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3402 // Determine if InstanceKlass has a previous version. |
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3403 bool InstanceKlass::has_previous_version() const { |
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3404 return (_previous_versions != NULL && _previous_versions->length() > 0); |
0 | 3405 } // end has_previous_version() |
3406 | |
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3407 |
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3408 Method* InstanceKlass::method_with_idnum(int idnum) { |
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3409 Method* m = NULL; |
0 | 3410 if (idnum < methods()->length()) { |
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3411 m = methods()->at(idnum); |
0 | 3412 } |
3413 if (m == NULL || m->method_idnum() != idnum) { | |
3414 for (int index = 0; index < methods()->length(); ++index) { | |
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3415 m = methods()->at(index); |
0 | 3416 if (m->method_idnum() == idnum) { |
3417 return m; | |
3418 } | |
3419 } | |
3420 } | |
3421 return m; | |
3422 } | |
3423 | |
3424 | |
3425 // Construct a PreviousVersionNode entry for the array hung off | |
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3426 // the InstanceKlass. |
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3427 PreviousVersionNode::PreviousVersionNode(ConstantPool* prev_constant_pool, |
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3428 bool prev_cp_is_weak, GrowableArray<Method*>* prev_EMCP_methods) { |
0 | 3429 |
3430 _prev_constant_pool = prev_constant_pool; | |
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3431 _prev_cp_is_weak = prev_cp_is_weak; |
0 | 3432 _prev_EMCP_methods = prev_EMCP_methods; |
3433 } | |
3434 | |
3435 | |
3436 // Destroy a PreviousVersionNode | |
3437 PreviousVersionNode::~PreviousVersionNode() { | |
3438 if (_prev_constant_pool != NULL) { | |
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3439 _prev_constant_pool = NULL; |
0 | 3440 } |
3441 | |
3442 if (_prev_EMCP_methods != NULL) { | |
3443 delete _prev_EMCP_methods; | |
3444 } | |
3445 } | |
3446 | |
3447 | |
3448 // Construct a PreviousVersionInfo entry | |
3449 PreviousVersionInfo::PreviousVersionInfo(PreviousVersionNode *pv_node) { | |
3450 _prev_constant_pool_handle = constantPoolHandle(); // NULL handle | |
3451 _prev_EMCP_method_handles = NULL; | |
3452 | |
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3453 ConstantPool* cp = pv_node->prev_constant_pool(); |
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3454 assert(cp != NULL, "constant pool ref was unexpectedly cleared"); |
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3455 if (cp == NULL) { |
0 | 3456 return; // robustness |
3457 } | |
3458 | |
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3459 // make the ConstantPool* safe to return |
0 | 3460 _prev_constant_pool_handle = constantPoolHandle(cp); |
3461 | |
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3462 GrowableArray<Method*>* method_refs = pv_node->prev_EMCP_methods(); |
0 | 3463 if (method_refs == NULL) { |
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3464 // the InstanceKlass did not have any EMCP methods |
0 | 3465 return; |
3466 } | |
3467 | |
3468 _prev_EMCP_method_handles = new GrowableArray<methodHandle>(10); | |
3469 | |
3470 int n_methods = method_refs->length(); | |
3471 for (int i = 0; i < n_methods; i++) { | |
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3472 Method* method = method_refs->at(i); |
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3473 assert (method != NULL, "method has been cleared"); |
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3474 if (method == NULL) { |
0 | 3475 continue; // robustness |
3476 } | |
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3477 // make the Method* safe to return |
0 | 3478 _prev_EMCP_method_handles->append(methodHandle(method)); |
3479 } | |
3480 } | |
3481 | |
3482 | |
3483 // Destroy a PreviousVersionInfo | |
3484 PreviousVersionInfo::~PreviousVersionInfo() { | |
3485 // Since _prev_EMCP_method_handles is not C-heap allocated, we | |
3486 // don't have to delete it. | |
3487 } | |
3488 | |
3489 | |
3490 // Construct a helper for walking the previous versions array | |
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3491 PreviousVersionWalker::PreviousVersionWalker(InstanceKlass *ik) { |
0 | 3492 _previous_versions = ik->previous_versions(); |
3493 _current_index = 0; | |
3494 // _hm needs no initialization | |
3495 _current_p = NULL; | |
3496 } | |
3497 | |
3498 | |
3499 // Destroy a PreviousVersionWalker | |
3500 PreviousVersionWalker::~PreviousVersionWalker() { | |
3501 // Delete the current info just in case the caller didn't walk to | |
3502 // the end of the previous versions list. No harm if _current_p is | |
3503 // already NULL. | |
3504 delete _current_p; | |
3505 | |
3506 // When _hm is destroyed, all the Handles returned in | |
3507 // PreviousVersionInfo objects will be destroyed. | |
3508 // Also, after this destructor is finished it will be | |
3509 // safe to delete the GrowableArray allocated in the | |
3510 // PreviousVersionInfo objects. | |
3511 } | |
3512 | |
3513 | |
3514 // Return the interesting information for the next previous version | |
3515 // of the klass. Returns NULL if there are no more previous versions. | |
3516 PreviousVersionInfo* PreviousVersionWalker::next_previous_version() { | |
3517 if (_previous_versions == NULL) { | |
3518 // no previous versions so nothing to return | |
3519 return NULL; | |
3520 } | |
3521 | |
3522 delete _current_p; // cleanup the previous info for the caller | |
3523 _current_p = NULL; // reset to NULL so we don't delete same object twice | |
3524 | |
3525 int length = _previous_versions->length(); | |
3526 | |
3527 while (_current_index < length) { | |
3528 PreviousVersionNode * pv_node = _previous_versions->at(_current_index++); | |
6197 | 3529 PreviousVersionInfo * pv_info = new (ResourceObj::C_HEAP, mtClass) |
0 | 3530 PreviousVersionInfo(pv_node); |
3531 | |
3532 constantPoolHandle cp_h = pv_info->prev_constant_pool_handle(); | |
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3533 assert (!cp_h.is_null(), "null cp found in previous version"); |
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3534 |
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3535 // The caller will need to delete pv_info when they are done with it. |
0 | 3536 _current_p = pv_info; |
3537 return pv_info; | |
3538 } | |
3539 | |
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3540 // all of the underlying nodes' info has been deleted |
0 | 3541 return NULL; |
3542 } // end next_previous_version() |