Mercurial > hg > truffle
annotate src/share/vm/oops/instanceKlass.cpp @ 8003:3c9bc17b9403
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author | bpittore |
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date | Thu, 07 Feb 2013 16:05:48 -0500 |
parents | 16fb9f942703 db9981fd3124 |
children | 927a311d00f9 |
rev | line source |
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0 | 1 /* |
7956 | 2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "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" | |
7956 | 37 #include "memory/heapInspection.hpp" |
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38 #include "memory/metadataFactory.hpp" |
1972 | 39 #include "memory/oopFactory.hpp" |
3938 | 40 #include "oops/fieldStreams.hpp" |
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41 #include "oops/instanceClassLoaderKlass.hpp" |
1972 | 42 #include "oops/instanceKlass.hpp" |
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43 #include "oops/instanceMirrorKlass.hpp" |
1972 | 44 #include "oops/instanceOop.hpp" |
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45 #include "oops/klass.inline.hpp" |
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46 #include "oops/method.hpp" |
1972 | 47 #include "oops/oop.inline.hpp" |
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48 #include "oops/symbol.hpp" |
1972 | 49 #include "prims/jvmtiExport.hpp" |
50 #include "prims/jvmtiRedefineClassesTrace.hpp" | |
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51 #include "prims/methodComparator.hpp" |
1972 | 52 #include "runtime/fieldDescriptor.hpp" |
53 #include "runtime/handles.inline.hpp" | |
54 #include "runtime/javaCalls.hpp" | |
55 #include "runtime/mutexLocker.hpp" | |
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56 #include "runtime/thread.inline.hpp" |
1972 | 57 #include "services/threadService.hpp" |
58 #include "utilities/dtrace.hpp" | |
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59 #include "utilities/macros.hpp" |
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60 #if INCLUDE_ALL_GCS |
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61 #include "gc_implementation/concurrentMarkSweep/cmsOopClosures.inline.hpp" |
1972 | 62 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" |
63 #include "gc_implementation/g1/g1OopClosures.inline.hpp" | |
64 #include "gc_implementation/g1/g1RemSet.inline.hpp" | |
65 #include "gc_implementation/g1/heapRegionSeq.inline.hpp" | |
66 #include "gc_implementation/parNew/parOopClosures.inline.hpp" | |
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67 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.inline.hpp" |
1972 | 68 #include "gc_implementation/parallelScavenge/psPromotionManager.inline.hpp" |
69 #include "gc_implementation/parallelScavenge/psScavenge.inline.hpp" | |
70 #include "oops/oop.pcgc.inline.hpp" | |
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71 #endif // INCLUDE_ALL_GCS |
1972 | 72 #ifdef COMPILER1 |
73 #include "c1/c1_Compiler.hpp" | |
74 #endif | |
0 | 75 |
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76 #ifdef DTRACE_ENABLED |
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77 |
4006 | 78 #ifndef USDT2 |
79 | |
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80 HS_DTRACE_PROBE_DECL4(hotspot, class__initialization__required, |
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81 char*, intptr_t, oop, intptr_t); |
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82 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__recursive, |
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83 char*, intptr_t, oop, intptr_t, int); |
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84 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__concurrent, |
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85 char*, intptr_t, oop, intptr_t, int); |
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86 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__erroneous, |
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87 char*, intptr_t, oop, intptr_t, int); |
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88 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__super__failed, |
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89 char*, intptr_t, oop, intptr_t, int); |
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90 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__clinit, |
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91 char*, intptr_t, oop, intptr_t, int); |
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92 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__error, |
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93 char*, intptr_t, oop, intptr_t, int); |
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94 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__end, |
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95 char*, intptr_t, oop, intptr_t, int); |
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96 |
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97 #define DTRACE_CLASSINIT_PROBE(type, clss, thread_type) \ |
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98 { \ |
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99 char* data = NULL; \ |
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100 int len = 0; \ |
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101 Symbol* name = (clss)->name(); \ |
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102 if (name != NULL) { \ |
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103 data = (char*)name->bytes(); \ |
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104 len = name->utf8_length(); \ |
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105 } \ |
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106 HS_DTRACE_PROBE4(hotspot, class__initialization__##type, \ |
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107 data, len, (clss)->class_loader(), thread_type); \ |
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108 } |
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109 |
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110 #define DTRACE_CLASSINIT_PROBE_WAIT(type, clss, thread_type, wait) \ |
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111 { \ |
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112 char* data = NULL; \ |
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113 int len = 0; \ |
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114 Symbol* name = (clss)->name(); \ |
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115 if (name != NULL) { \ |
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116 data = (char*)name->bytes(); \ |
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117 len = name->utf8_length(); \ |
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118 } \ |
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119 HS_DTRACE_PROBE5(hotspot, class__initialization__##type, \ |
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120 data, len, (clss)->class_loader(), thread_type, wait); \ |
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121 } |
4006 | 122 #else /* USDT2 */ |
123 | |
124 #define HOTSPOT_CLASS_INITIALIZATION_required HOTSPOT_CLASS_INITIALIZATION_REQUIRED | |
125 #define HOTSPOT_CLASS_INITIALIZATION_recursive HOTSPOT_CLASS_INITIALIZATION_RECURSIVE | |
126 #define HOTSPOT_CLASS_INITIALIZATION_concurrent HOTSPOT_CLASS_INITIALIZATION_CONCURRENT | |
127 #define HOTSPOT_CLASS_INITIALIZATION_erroneous HOTSPOT_CLASS_INITIALIZATION_ERRONEOUS | |
128 #define HOTSPOT_CLASS_INITIALIZATION_super__failed HOTSPOT_CLASS_INITIALIZATION_SUPER_FAILED | |
129 #define HOTSPOT_CLASS_INITIALIZATION_clinit HOTSPOT_CLASS_INITIALIZATION_CLINIT | |
130 #define HOTSPOT_CLASS_INITIALIZATION_error HOTSPOT_CLASS_INITIALIZATION_ERROR | |
131 #define HOTSPOT_CLASS_INITIALIZATION_end HOTSPOT_CLASS_INITIALIZATION_END | |
132 #define DTRACE_CLASSINIT_PROBE(type, clss, thread_type) \ | |
133 { \ | |
134 char* data = NULL; \ | |
135 int len = 0; \ | |
136 Symbol* name = (clss)->name(); \ | |
137 if (name != NULL) { \ | |
138 data = (char*)name->bytes(); \ | |
139 len = name->utf8_length(); \ | |
140 } \ | |
141 HOTSPOT_CLASS_INITIALIZATION_##type( \ | |
142 data, len, (clss)->class_loader(), thread_type); \ | |
143 } | |
144 | |
145 #define DTRACE_CLASSINIT_PROBE_WAIT(type, clss, thread_type, wait) \ | |
146 { \ | |
147 char* data = NULL; \ | |
148 int len = 0; \ | |
149 Symbol* name = (clss)->name(); \ | |
150 if (name != NULL) { \ | |
151 data = (char*)name->bytes(); \ | |
152 len = name->utf8_length(); \ | |
153 } \ | |
154 HOTSPOT_CLASS_INITIALIZATION_##type( \ | |
155 data, len, (clss)->class_loader(), thread_type, wait); \ | |
156 } | |
157 #endif /* USDT2 */ | |
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158 |
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159 #else // ndef DTRACE_ENABLED |
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160 |
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161 #define DTRACE_CLASSINIT_PROBE(type, clss, thread_type) |
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162 #define DTRACE_CLASSINIT_PROBE_WAIT(type, clss, thread_type, wait) |
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163 |
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164 #endif // ndef DTRACE_ENABLED |
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165 |
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166 volatile int InstanceKlass::_total_instanceKlass_count = 0; |
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167 |
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168 Klass* InstanceKlass::allocate_instance_klass(ClassLoaderData* loader_data, |
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169 int vtable_len, |
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170 int itable_len, |
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171 int static_field_size, |
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172 int nonstatic_oop_map_size, |
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173 ReferenceType rt, |
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174 AccessFlags access_flags, |
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175 Symbol* name, |
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176 Klass* super_klass, |
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177 KlassHandle host_klass, |
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178 TRAPS) { |
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179 |
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180 int size = InstanceKlass::size(vtable_len, itable_len, nonstatic_oop_map_size, |
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181 access_flags.is_interface(), |
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182 !host_klass.is_null()); |
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183 |
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184 // Allocation |
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185 InstanceKlass* ik; |
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186 if (rt == REF_NONE) { |
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187 if (name == vmSymbols::java_lang_Class()) { |
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188 ik = new (loader_data, size, THREAD) InstanceMirrorKlass( |
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189 vtable_len, itable_len, static_field_size, nonstatic_oop_map_size, rt, |
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190 access_flags, !host_klass.is_null()); |
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191 } else if (name == vmSymbols::java_lang_ClassLoader() || |
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192 (SystemDictionary::ClassLoader_klass_loaded() && |
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193 super_klass != NULL && |
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194 super_klass->is_subtype_of(SystemDictionary::ClassLoader_klass()))) { |
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195 ik = new (loader_data, size, THREAD) InstanceClassLoaderKlass( |
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196 vtable_len, itable_len, static_field_size, nonstatic_oop_map_size, rt, |
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197 access_flags, !host_klass.is_null()); |
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198 } else { |
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199 // normal class |
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200 ik = new (loader_data, size, THREAD) InstanceKlass( |
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201 vtable_len, itable_len, static_field_size, nonstatic_oop_map_size, rt, |
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202 access_flags, !host_klass.is_null()); |
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203 } |
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204 } else { |
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205 // reference klass |
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206 ik = new (loader_data, size, THREAD) InstanceRefKlass( |
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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 |
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211 Atomic::inc(&_total_instanceKlass_count); |
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212 return ik; |
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213 } |
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214 |
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215 InstanceKlass::InstanceKlass(int vtable_len, |
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216 int itable_len, |
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217 int static_field_size, |
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218 int nonstatic_oop_map_size, |
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219 ReferenceType rt, |
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220 AccessFlags access_flags, |
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221 bool is_anonymous) { |
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222 No_Safepoint_Verifier no_safepoint; // until k becomes parsable |
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223 |
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224 int size = InstanceKlass::size(vtable_len, itable_len, nonstatic_oop_map_size, |
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225 access_flags.is_interface(), is_anonymous); |
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226 |
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227 // The sizes of these these three variables are used for determining the |
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228 // size of the instanceKlassOop. It is critical that these are set to the right |
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229 // sizes before the first GC, i.e., when we allocate the mirror. |
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230 this->set_vtable_length(vtable_len); |
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231 this->set_itable_length(itable_len); |
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232 this->set_static_field_size(static_field_size); |
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233 this->set_nonstatic_oop_map_size(nonstatic_oop_map_size); |
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234 this->set_access_flags(access_flags); |
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235 this->set_is_anonymous(is_anonymous); |
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236 assert(this->size() == size, "wrong size for object"); |
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237 |
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238 this->set_array_klasses(NULL); |
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239 this->set_methods(NULL); |
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240 this->set_method_ordering(NULL); |
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241 this->set_local_interfaces(NULL); |
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242 this->set_transitive_interfaces(NULL); |
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243 this->init_implementor(); |
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244 this->set_fields(NULL, 0); |
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245 this->set_constants(NULL); |
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246 this->set_class_loader_data(NULL); |
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247 this->set_protection_domain(NULL); |
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248 this->set_signers(NULL); |
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249 this->set_source_file_name(NULL); |
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250 this->set_source_debug_extension(NULL, 0); |
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251 this->set_array_name(NULL); |
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252 this->set_inner_classes(NULL); |
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253 this->set_static_oop_field_count(0); |
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254 this->set_nonstatic_field_size(0); |
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255 this->set_is_marked_dependent(false); |
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256 this->set_init_state(InstanceKlass::allocated); |
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257 this->set_init_thread(NULL); |
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258 this->set_init_lock(NULL); |
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259 this->set_reference_type(rt); |
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260 this->set_oop_map_cache(NULL); |
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261 this->set_jni_ids(NULL); |
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262 this->set_osr_nmethods_head(NULL); |
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263 this->set_breakpoints(NULL); |
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264 this->init_previous_versions(); |
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265 this->set_generic_signature(NULL); |
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266 this->release_set_methods_jmethod_ids(NULL); |
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267 this->release_set_methods_cached_itable_indices(NULL); |
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268 this->set_annotations(NULL); |
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269 this->set_jvmti_cached_class_field_map(NULL); |
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270 this->set_initial_method_idnum(0); |
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271 |
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272 // initialize the non-header words to zero |
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273 intptr_t* p = (intptr_t*)this; |
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274 for (int index = InstanceKlass::header_size(); index < size; index++) { |
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275 p[index] = NULL_WORD; |
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276 } |
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277 |
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278 // Set temporary value until parseClassFile updates it with the real instance |
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279 // size. |
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280 this->set_layout_helper(Klass::instance_layout_helper(0, true)); |
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281 } |
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282 |
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283 |
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284 // This function deallocates the metadata and C heap pointers that the |
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285 // InstanceKlass points to. |
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286 void InstanceKlass::deallocate_contents(ClassLoaderData* loader_data) { |
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287 |
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288 // Orphan the mirror first, CMS thinks it's still live. |
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289 java_lang_Class::set_klass(java_mirror(), NULL); |
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290 |
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291 // Need to take this class off the class loader data list. |
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292 loader_data->remove_class(this); |
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293 |
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294 // The array_klass for this class is created later, after error handling. |
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295 // For class redefinition, we keep the original class so this scratch class |
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296 // doesn't have an array class. Either way, assert that there is nothing |
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297 // to deallocate. |
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298 assert(array_klasses() == NULL, "array classes shouldn't be created for this class yet"); |
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299 |
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300 // Release C heap allocated data that this might point to, which includes |
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301 // reference counting symbol names. |
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302 release_C_heap_structures(); |
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303 |
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304 Array<Method*>* ms = methods(); |
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305 if (ms != Universe::the_empty_method_array()) { |
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306 for (int i = 0; i <= methods()->length() -1 ; i++) { |
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307 Method* method = methods()->at(i); |
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308 // Only want to delete methods that are not executing for RedefineClasses. |
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309 // The previous version will point to them so they're not totally dangling |
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310 assert (!method->on_stack(), "shouldn't be called with methods on stack"); |
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311 MetadataFactory::free_metadata(loader_data, method); |
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312 } |
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313 MetadataFactory::free_array<Method*>(loader_data, methods()); |
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314 } |
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315 set_methods(NULL); |
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316 |
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317 if (method_ordering() != Universe::the_empty_int_array()) { |
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318 MetadataFactory::free_array<int>(loader_data, method_ordering()); |
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319 } |
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320 set_method_ordering(NULL); |
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321 |
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322 // This array is in Klass, but remove it with the InstanceKlass since |
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323 // this place would be the only caller and it can share memory with transitive |
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324 // interfaces. |
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325 if (secondary_supers() != Universe::the_empty_klass_array() && |
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326 secondary_supers() != transitive_interfaces()) { |
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327 MetadataFactory::free_array<Klass*>(loader_data, secondary_supers()); |
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328 } |
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329 set_secondary_supers(NULL); |
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330 |
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331 // Only deallocate transitive interfaces if not empty, same as super class |
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332 // or same as local interfaces. See code in parseClassFile. |
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333 Array<Klass*>* ti = transitive_interfaces(); |
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334 if (ti != Universe::the_empty_klass_array() && ti != local_interfaces()) { |
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335 // check that the interfaces don't come from super class |
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336 Array<Klass*>* sti = (super() == NULL) ? NULL : |
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337 InstanceKlass::cast(super())->transitive_interfaces(); |
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338 if (ti != sti) { |
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339 MetadataFactory::free_array<Klass*>(loader_data, ti); |
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340 } |
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341 } |
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342 set_transitive_interfaces(NULL); |
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343 |
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344 // local interfaces can be empty |
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345 Array<Klass*>* li = local_interfaces(); |
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346 if (li != Universe::the_empty_klass_array()) { |
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347 MetadataFactory::free_array<Klass*>(loader_data, li); |
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348 } |
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349 set_local_interfaces(NULL); |
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350 |
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351 MetadataFactory::free_array<jushort>(loader_data, fields()); |
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352 set_fields(NULL, 0); |
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353 |
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354 // If a method from a redefined class is using this constant pool, don't |
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355 // delete it, yet. The new class's previous version will point to this. |
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356 assert (!constants()->on_stack(), "shouldn't be called if anything is onstack"); |
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357 MetadataFactory::free_metadata(loader_data, constants()); |
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358 set_constants(NULL); |
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359 |
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360 if (inner_classes() != Universe::the_empty_short_array()) { |
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361 MetadataFactory::free_array<jushort>(loader_data, inner_classes()); |
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362 } |
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363 set_inner_classes(NULL); |
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364 |
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365 // Null out Java heap objects, although these won't be walked to keep |
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366 // alive once this InstanceKlass is deallocated. |
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367 set_protection_domain(NULL); |
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368 set_signers(NULL); |
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369 set_init_lock(NULL); |
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370 |
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371 // We should deallocate the Annotations instance |
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372 MetadataFactory::free_metadata(loader_data, annotations()); |
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373 set_annotations(NULL); |
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374 } |
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375 |
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376 volatile oop InstanceKlass::init_lock() const { |
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377 volatile oop lock = _init_lock; // read once |
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378 assert((oop)lock != NULL || !is_not_initialized(), // initialized or in_error state |
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379 "only fully initialized state can have a null lock"); |
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380 return lock; |
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381 } |
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382 |
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383 // Set the initialization lock to null so the object can be GC'ed. Any racing |
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384 // threads to get this lock will see a null lock and will not lock. |
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385 // That's okay because they all check for initialized state after getting |
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386 // the lock and return. |
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387 void InstanceKlass::fence_and_clear_init_lock() { |
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388 // make sure previous stores are all done, notably the init_state. |
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389 OrderAccess::storestore(); |
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390 klass_oop_store(&_init_lock, NULL); |
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391 assert(!is_not_initialized(), "class must be initialized now"); |
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392 } |
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393 |
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394 |
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395 bool InstanceKlass::should_be_initialized() const { |
0 | 396 return !is_initialized(); |
397 } | |
398 | |
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399 klassVtable* InstanceKlass::vtable() const { |
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400 return new klassVtable(this, start_of_vtable(), vtable_length() / vtableEntry::size()); |
0 | 401 } |
402 | |
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403 klassItable* InstanceKlass::itable() const { |
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404 return new klassItable(instanceKlassHandle(this)); |
0 | 405 } |
406 | |
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407 void InstanceKlass::eager_initialize(Thread *thread) { |
0 | 408 if (!EagerInitialization) return; |
409 | |
410 if (this->is_not_initialized()) { | |
411 // abort if the the class has a class initializer | |
412 if (this->class_initializer() != NULL) return; | |
413 | |
414 // abort if it is java.lang.Object (initialization is handled in genesis) | |
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415 Klass* super = this->super(); |
0 | 416 if (super == NULL) return; |
417 | |
418 // abort if the super class should be initialized | |
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419 if (!InstanceKlass::cast(super)->is_initialized()) return; |
0 | 420 |
421 // call body to expose the this pointer | |
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422 instanceKlassHandle this_oop(thread, this); |
0 | 423 eager_initialize_impl(this_oop); |
424 } | |
425 } | |
426 | |
427 | |
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428 void InstanceKlass::eager_initialize_impl(instanceKlassHandle this_oop) { |
0 | 429 EXCEPTION_MARK; |
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430 volatile oop init_lock = this_oop->init_lock(); |
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431 ObjectLocker ol(init_lock, THREAD, init_lock != NULL); |
0 | 432 |
433 // abort if someone beat us to the initialization | |
434 if (!this_oop->is_not_initialized()) return; // note: not equivalent to is_initialized() | |
435 | |
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436 ClassState old_state = this_oop->init_state(); |
0 | 437 link_class_impl(this_oop, true, THREAD); |
438 if (HAS_PENDING_EXCEPTION) { | |
439 CLEAR_PENDING_EXCEPTION; | |
440 // Abort if linking the class throws an exception. | |
441 | |
442 // Use a test to avoid redundantly resetting the state if there's | |
443 // no change. Set_init_state() asserts that state changes make | |
444 // progress, whereas here we might just be spinning in place. | |
445 if( old_state != this_oop->_init_state ) | |
446 this_oop->set_init_state (old_state); | |
447 } else { | |
448 // linking successfull, mark class as initialized | |
449 this_oop->set_init_state (fully_initialized); | |
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450 this_oop->fence_and_clear_init_lock(); |
0 | 451 // trace |
452 if (TraceClassInitialization) { | |
453 ResourceMark rm(THREAD); | |
454 tty->print_cr("[Initialized %s without side effects]", this_oop->external_name()); | |
455 } | |
456 } | |
457 } | |
458 | |
459 | |
460 // See "The Virtual Machine Specification" section 2.16.5 for a detailed explanation of the class initialization | |
461 // process. The step comments refers to the procedure described in that section. | |
462 // Note: implementation moved to static method to expose the this pointer. | |
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463 void InstanceKlass::initialize(TRAPS) { |
0 | 464 if (this->should_be_initialized()) { |
465 HandleMark hm(THREAD); | |
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466 instanceKlassHandle this_oop(THREAD, this); |
0 | 467 initialize_impl(this_oop, CHECK); |
468 // Note: at this point the class may be initialized | |
469 // OR it may be in the state of being initialized | |
470 // in case of recursive initialization! | |
471 } else { | |
472 assert(is_initialized(), "sanity check"); | |
473 } | |
474 } | |
475 | |
476 | |
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477 bool InstanceKlass::verify_code( |
0 | 478 instanceKlassHandle this_oop, bool throw_verifyerror, TRAPS) { |
479 // 1) Verify the bytecodes | |
480 Verifier::Mode mode = | |
481 throw_verifyerror ? Verifier::ThrowException : Verifier::NoException; | |
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482 return Verifier::verify(this_oop, mode, this_oop->should_verify_class(), CHECK_false); |
0 | 483 } |
484 | |
485 | |
486 // Used exclusively by the shared spaces dump mechanism to prevent | |
487 // classes mapped into the shared regions in new VMs from appearing linked. | |
488 | |
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489 void InstanceKlass::unlink_class() { |
0 | 490 assert(is_linked(), "must be linked"); |
491 _init_state = loaded; | |
492 } | |
493 | |
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494 void InstanceKlass::link_class(TRAPS) { |
0 | 495 assert(is_loaded(), "must be loaded"); |
496 if (!is_linked()) { | |
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497 HandleMark hm(THREAD); |
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498 instanceKlassHandle this_oop(THREAD, this); |
0 | 499 link_class_impl(this_oop, true, CHECK); |
500 } | |
501 } | |
502 | |
503 // Called to verify that a class can link during initialization, without | |
504 // throwing a VerifyError. | |
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505 bool InstanceKlass::link_class_or_fail(TRAPS) { |
0 | 506 assert(is_loaded(), "must be loaded"); |
507 if (!is_linked()) { | |
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508 HandleMark hm(THREAD); |
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509 instanceKlassHandle this_oop(THREAD, this); |
0 | 510 link_class_impl(this_oop, false, CHECK_false); |
511 } | |
512 return is_linked(); | |
513 } | |
514 | |
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515 bool InstanceKlass::link_class_impl( |
0 | 516 instanceKlassHandle this_oop, bool throw_verifyerror, TRAPS) { |
517 // check for error state | |
518 if (this_oop->is_in_error_state()) { | |
519 ResourceMark rm(THREAD); | |
520 THROW_MSG_(vmSymbols::java_lang_NoClassDefFoundError(), | |
521 this_oop->external_name(), false); | |
522 } | |
523 // return if already verified | |
524 if (this_oop->is_linked()) { | |
525 return true; | |
526 } | |
527 | |
528 // Timing | |
529 // timer handles recursion | |
530 assert(THREAD->is_Java_thread(), "non-JavaThread in link_class_impl"); | |
531 JavaThread* jt = (JavaThread*)THREAD; | |
532 | |
533 // link super class before linking this class | |
534 instanceKlassHandle super(THREAD, this_oop->super()); | |
535 if (super.not_null()) { | |
536 if (super->is_interface()) { // check if super class is an interface | |
537 ResourceMark rm(THREAD); | |
538 Exceptions::fthrow( | |
539 THREAD_AND_LOCATION, | |
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540 vmSymbols::java_lang_IncompatibleClassChangeError(), |
0 | 541 "class %s has interface %s as super class", |
542 this_oop->external_name(), | |
543 super->external_name() | |
544 ); | |
545 return false; | |
546 } | |
547 | |
548 link_class_impl(super, throw_verifyerror, CHECK_false); | |
549 } | |
550 | |
551 // link all interfaces implemented by this class before linking this class | |
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552 Array<Klass*>* interfaces = this_oop->local_interfaces(); |
0 | 553 int num_interfaces = interfaces->length(); |
554 for (int index = 0; index < num_interfaces; index++) { | |
555 HandleMark hm(THREAD); | |
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556 instanceKlassHandle ih(THREAD, interfaces->at(index)); |
0 | 557 link_class_impl(ih, throw_verifyerror, CHECK_false); |
558 } | |
559 | |
560 // in case the class is linked in the process of linking its superclasses | |
561 if (this_oop->is_linked()) { | |
562 return true; | |
563 } | |
564 | |
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565 // trace only the link time for this klass that includes |
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566 // the verification time |
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567 PerfClassTraceTime vmtimer(ClassLoader::perf_class_link_time(), |
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568 ClassLoader::perf_class_link_selftime(), |
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569 ClassLoader::perf_classes_linked(), |
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570 jt->get_thread_stat()->perf_recursion_counts_addr(), |
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571 jt->get_thread_stat()->perf_timers_addr(), |
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572 PerfClassTraceTime::CLASS_LINK); |
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573 |
0 | 574 // verification & rewriting |
575 { | |
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576 volatile oop init_lock = this_oop->init_lock(); |
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577 ObjectLocker ol(init_lock, THREAD, init_lock != NULL); |
0 | 578 // rewritten will have been set if loader constraint error found |
579 // on an earlier link attempt | |
580 // don't verify or rewrite if already rewritten | |
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581 |
0 | 582 if (!this_oop->is_linked()) { |
583 if (!this_oop->is_rewritten()) { | |
584 { | |
585 // Timer includes any side effects of class verification (resolution, | |
586 // etc), but not recursive entry into verify_code(). | |
875
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587 PerfClassTraceTime timer(ClassLoader::perf_class_verify_time(), |
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588 ClassLoader::perf_class_verify_selftime(), |
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589 ClassLoader::perf_classes_verified(), |
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590 jt->get_thread_stat()->perf_recursion_counts_addr(), |
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591 jt->get_thread_stat()->perf_timers_addr(), |
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592 PerfClassTraceTime::CLASS_VERIFY); |
0 | 593 bool verify_ok = verify_code(this_oop, throw_verifyerror, THREAD); |
594 if (!verify_ok) { | |
595 return false; | |
596 } | |
597 } | |
598 | |
599 // Just in case a side-effect of verify linked this class already | |
600 // (which can sometimes happen since the verifier loads classes | |
601 // using custom class loaders, which are free to initialize things) | |
602 if (this_oop->is_linked()) { | |
603 return true; | |
604 } | |
605 | |
606 // also sets rewritten | |
607 this_oop->rewrite_class(CHECK_false); | |
608 } | |
609 | |
3748 | 610 // relocate jsrs and link methods after they are all rewritten |
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611 this_oop->link_methods(CHECK_false); |
3748 | 612 |
0 | 613 // Initialize the vtable and interface table after |
614 // methods have been rewritten since rewrite may | |
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615 // fabricate new Method*s. |
0 | 616 // also does loader constraint checking |
617 if (!this_oop()->is_shared()) { | |
618 ResourceMark rm(THREAD); | |
619 this_oop->vtable()->initialize_vtable(true, CHECK_false); | |
620 this_oop->itable()->initialize_itable(true, CHECK_false); | |
621 } | |
622 #ifdef ASSERT | |
623 else { | |
624 ResourceMark rm(THREAD); | |
625 this_oop->vtable()->verify(tty, true); | |
626 // In case itable verification is ever added. | |
627 // this_oop->itable()->verify(tty, true); | |
628 } | |
629 #endif | |
630 this_oop->set_init_state(linked); | |
631 if (JvmtiExport::should_post_class_prepare()) { | |
632 Thread *thread = THREAD; | |
633 assert(thread->is_Java_thread(), "thread->is_Java_thread()"); | |
634 JvmtiExport::post_class_prepare((JavaThread *) thread, this_oop()); | |
635 } | |
636 } | |
637 } | |
638 return true; | |
639 } | |
640 | |
641 | |
642 // Rewrite the byte codes of all of the methods of a class. | |
643 // The rewriter must be called exactly once. Rewriting must happen after | |
644 // verification but before the first method of the class is executed. | |
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645 void InstanceKlass::rewrite_class(TRAPS) { |
0 | 646 assert(is_loaded(), "must be loaded"); |
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647 instanceKlassHandle this_oop(THREAD, this); |
0 | 648 if (this_oop->is_rewritten()) { |
649 assert(this_oop()->is_shared(), "rewriting an unshared class?"); | |
650 return; | |
651 } | |
3748 | 652 Rewriter::rewrite(this_oop, CHECK); |
0 | 653 this_oop->set_rewritten(); |
654 } | |
655 | |
3748 | 656 // Now relocate and link method entry points after class is rewritten. |
657 // This is outside is_rewritten flag. In case of an exception, it can be | |
658 // executed more than once. | |
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659 void InstanceKlass::link_methods(TRAPS) { |
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660 int len = methods()->length(); |
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661 for (int i = len-1; i >= 0; i--) { |
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662 methodHandle m(THREAD, methods()->at(i)); |
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663 |
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664 // Set up method entry points for compiler and interpreter . |
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665 m->link_method(m, CHECK); |
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666 |
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667 // This is for JVMTI and unrelated to relocator but the last thing we do |
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668 #ifdef ASSERT |
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669 if (StressMethodComparator) { |
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670 ResourceMark rm(THREAD); |
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671 static int nmc = 0; |
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672 for (int j = i; j >= 0 && j >= i-4; j--) { |
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673 if ((++nmc % 1000) == 0) tty->print_cr("Have run MethodComparator %d times...", nmc); |
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674 bool z = MethodComparator::methods_EMCP(m(), |
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675 methods()->at(j)); |
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676 if (j == i && !z) { |
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677 tty->print("MethodComparator FAIL: "); m->print(); m->print_codes(); |
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678 assert(z, "method must compare equal to itself"); |
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679 } |
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680 } |
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681 } |
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682 #endif //ASSERT |
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683 } |
3748 | 684 } |
685 | |
0 | 686 |
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687 void InstanceKlass::initialize_impl(instanceKlassHandle this_oop, TRAPS) { |
0 | 688 // Make sure klass is linked (verified) before initialization |
689 // A class could already be verified, since it has been reflected upon. | |
690 this_oop->link_class(CHECK); | |
691 | |
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692 DTRACE_CLASSINIT_PROBE(required, InstanceKlass::cast(this_oop()), -1); |
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693 |
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694 bool wait = false; |
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695 |
0 | 696 // refer to the JVM book page 47 for description of steps |
697 // Step 1 | |
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698 { |
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699 volatile oop init_lock = this_oop->init_lock(); |
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700 ObjectLocker ol(init_lock, THREAD, init_lock != NULL); |
0 | 701 |
702 Thread *self = THREAD; // it's passed the current thread | |
703 | |
704 // Step 2 | |
705 // If we were to use wait() instead of waitInterruptibly() then | |
706 // we might end up throwing IE from link/symbol resolution sites | |
707 // that aren't expected to throw. This would wreak havoc. See 6320309. | |
708 while(this_oop->is_being_initialized() && !this_oop->is_reentrant_initialization(self)) { | |
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709 wait = true; |
0 | 710 ol.waitUninterruptibly(CHECK); |
711 } | |
712 | |
713 // Step 3 | |
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714 if (this_oop->is_being_initialized() && this_oop->is_reentrant_initialization(self)) { |
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715 DTRACE_CLASSINIT_PROBE_WAIT(recursive, InstanceKlass::cast(this_oop()), -1,wait); |
0 | 716 return; |
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717 } |
0 | 718 |
719 // Step 4 | |
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720 if (this_oop->is_initialized()) { |
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721 DTRACE_CLASSINIT_PROBE_WAIT(concurrent, InstanceKlass::cast(this_oop()), -1,wait); |
0 | 722 return; |
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723 } |
0 | 724 |
725 // Step 5 | |
726 if (this_oop->is_in_error_state()) { | |
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727 DTRACE_CLASSINIT_PROBE_WAIT(erroneous, InstanceKlass::cast(this_oop()), -1,wait); |
0 | 728 ResourceMark rm(THREAD); |
729 const char* desc = "Could not initialize class "; | |
730 const char* className = this_oop->external_name(); | |
731 size_t msglen = strlen(desc) + strlen(className) + 1; | |
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732 char* message = NEW_RESOURCE_ARRAY(char, msglen); |
0 | 733 if (NULL == message) { |
734 // Out of memory: can't create detailed error message | |
735 THROW_MSG(vmSymbols::java_lang_NoClassDefFoundError(), className); | |
736 } else { | |
737 jio_snprintf(message, msglen, "%s%s", desc, className); | |
738 THROW_MSG(vmSymbols::java_lang_NoClassDefFoundError(), message); | |
739 } | |
740 } | |
741 | |
742 // Step 6 | |
743 this_oop->set_init_state(being_initialized); | |
744 this_oop->set_init_thread(self); | |
745 } | |
746 | |
747 // Step 7 | |
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748 Klass* super_klass = this_oop->super(); |
6983 | 749 if (super_klass != NULL && !this_oop->is_interface() && super_klass->should_be_initialized()) { |
750 super_klass->initialize(THREAD); | |
0 | 751 |
752 if (HAS_PENDING_EXCEPTION) { | |
753 Handle e(THREAD, PENDING_EXCEPTION); | |
754 CLEAR_PENDING_EXCEPTION; | |
755 { | |
756 EXCEPTION_MARK; | |
757 this_oop->set_initialization_state_and_notify(initialization_error, THREAD); // Locks object, set state, and notify all waiting threads | |
758 CLEAR_PENDING_EXCEPTION; // ignore any exception thrown, superclass initialization error is thrown below | |
759 } | |
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760 DTRACE_CLASSINIT_PROBE_WAIT(super__failed, InstanceKlass::cast(this_oop()), -1,wait); |
0 | 761 THROW_OOP(e()); |
762 } | |
763 } | |
764 | |
6934 | 765 if (this_oop->has_default_methods()) { |
766 // Step 7.5: initialize any interfaces which have default methods | |
767 for (int i = 0; i < this_oop->local_interfaces()->length(); ++i) { | |
768 Klass* iface = this_oop->local_interfaces()->at(i); | |
769 InstanceKlass* ik = InstanceKlass::cast(iface); | |
770 if (ik->has_default_methods() && ik->should_be_initialized()) { | |
771 ik->initialize(THREAD); | |
772 | |
773 if (HAS_PENDING_EXCEPTION) { | |
774 Handle e(THREAD, PENDING_EXCEPTION); | |
775 CLEAR_PENDING_EXCEPTION; | |
776 { | |
777 EXCEPTION_MARK; | |
778 // Locks object, set state, and notify all waiting threads | |
779 this_oop->set_initialization_state_and_notify( | |
780 initialization_error, THREAD); | |
781 | |
782 // ignore any exception thrown, superclass initialization error is | |
783 // thrown below | |
784 CLEAR_PENDING_EXCEPTION; | |
785 } | |
786 DTRACE_CLASSINIT_PROBE_WAIT( | |
787 super__failed, InstanceKlass::cast(this_oop()), -1, wait); | |
788 THROW_OOP(e()); | |
789 } | |
790 } | |
791 } | |
792 } | |
793 | |
0 | 794 // Step 8 |
795 { | |
796 assert(THREAD->is_Java_thread(), "non-JavaThread in initialize_impl"); | |
797 JavaThread* jt = (JavaThread*)THREAD; | |
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798 DTRACE_CLASSINIT_PROBE_WAIT(clinit, InstanceKlass::cast(this_oop()), -1,wait); |
0 | 799 // Timer includes any side effects of class initialization (resolution, |
800 // etc), but not recursive entry into call_class_initializer(). | |
875
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801 PerfClassTraceTime timer(ClassLoader::perf_class_init_time(), |
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802 ClassLoader::perf_class_init_selftime(), |
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803 ClassLoader::perf_classes_inited(), |
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804 jt->get_thread_stat()->perf_recursion_counts_addr(), |
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805 jt->get_thread_stat()->perf_timers_addr(), |
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806 PerfClassTraceTime::CLASS_CLINIT); |
0 | 807 this_oop->call_class_initializer(THREAD); |
808 } | |
809 | |
810 // Step 9 | |
811 if (!HAS_PENDING_EXCEPTION) { | |
812 this_oop->set_initialization_state_and_notify(fully_initialized, CHECK); | |
813 { ResourceMark rm(THREAD); | |
814 debug_only(this_oop->vtable()->verify(tty, true);) | |
815 } | |
816 } | |
817 else { | |
818 // Step 10 and 11 | |
819 Handle e(THREAD, PENDING_EXCEPTION); | |
820 CLEAR_PENDING_EXCEPTION; | |
821 { | |
822 EXCEPTION_MARK; | |
823 this_oop->set_initialization_state_and_notify(initialization_error, THREAD); | |
824 CLEAR_PENDING_EXCEPTION; // ignore any exception thrown, class initialization error is thrown below | |
825 } | |
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826 DTRACE_CLASSINIT_PROBE_WAIT(error, InstanceKlass::cast(this_oop()), -1,wait); |
1142 | 827 if (e->is_a(SystemDictionary::Error_klass())) { |
0 | 828 THROW_OOP(e()); |
829 } else { | |
830 JavaCallArguments args(e); | |
2177
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831 THROW_ARG(vmSymbols::java_lang_ExceptionInInitializerError(), |
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832 vmSymbols::throwable_void_signature(), |
0 | 833 &args); |
834 } | |
835 } | |
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836 DTRACE_CLASSINIT_PROBE_WAIT(end, InstanceKlass::cast(this_oop()), -1,wait); |
0 | 837 } |
838 | |
839 | |
840 // Note: implementation moved to static method to expose the this pointer. | |
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841 void InstanceKlass::set_initialization_state_and_notify(ClassState state, TRAPS) { |
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842 instanceKlassHandle kh(THREAD, this); |
0 | 843 set_initialization_state_and_notify_impl(kh, state, CHECK); |
844 } | |
845 | |
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846 void InstanceKlass::set_initialization_state_and_notify_impl(instanceKlassHandle this_oop, ClassState state, TRAPS) { |
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847 volatile oop init_lock = this_oop->init_lock(); |
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848 ObjectLocker ol(init_lock, THREAD, init_lock != NULL); |
0 | 849 this_oop->set_init_state(state); |
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850 this_oop->fence_and_clear_init_lock(); |
0 | 851 ol.notify_all(CHECK); |
852 } | |
853 | |
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854 // The embedded _implementor field can only record one implementor. |
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855 // When there are more than one implementors, the _implementor field |
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856 // is set to the interface Klass* itself. Following are the possible |
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857 // values for the _implementor field: |
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858 // NULL - no implementor |
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859 // implementor Klass* - one implementor |
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860 // self - more than one implementor |
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861 // |
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862 // The _implementor field only exists for interfaces. |
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863 void InstanceKlass::add_implementor(Klass* k) { |
0 | 864 assert(Compile_lock->owned_by_self(), ""); |
5998
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865 assert(is_interface(), "not interface"); |
0 | 866 // Filter out my subinterfaces. |
867 // (Note: Interfaces are never on the subklass list.) | |
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868 if (InstanceKlass::cast(k)->is_interface()) return; |
0 | 869 |
870 // Filter out subclasses whose supers already implement me. | |
871 // (Note: CHA must walk subclasses of direct implementors | |
872 // in order to locate indirect implementors.) | |
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873 Klass* sk = InstanceKlass::cast(k)->super(); |
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874 if (sk != NULL && InstanceKlass::cast(sk)->implements_interface(this)) |
0 | 875 // We only need to check one immediate superclass, since the |
876 // implements_interface query looks at transitive_interfaces. | |
877 // Any supers of the super have the same (or fewer) transitive_interfaces. | |
878 return; | |
879 | |
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880 Klass* ik = implementor(); |
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881 if (ik == NULL) { |
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882 set_implementor(k); |
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883 } else if (ik != this) { |
5998
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884 // There is already an implementor. Use itself as an indicator of |
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885 // more than one implementors. |
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886 set_implementor(this); |
0 | 887 } |
888 | |
889 // The implementor also implements the transitive_interfaces | |
890 for (int index = 0; index < local_interfaces()->length(); index++) { | |
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891 InstanceKlass::cast(local_interfaces()->at(index))->add_implementor(k); |
0 | 892 } |
893 } | |
894 | |
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895 void InstanceKlass::init_implementor() { |
5998
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896 if (is_interface()) { |
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897 set_implementor(NULL); |
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898 } |
0 | 899 } |
900 | |
901 | |
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902 void InstanceKlass::process_interfaces(Thread *thread) { |
0 | 903 // link this class into the implementors list of every interface it implements |
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904 Klass* this_as_klass_oop = this; |
0 | 905 for (int i = local_interfaces()->length() - 1; i >= 0; i--) { |
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906 assert(local_interfaces()->at(i)->is_klass(), "must be a klass"); |
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907 InstanceKlass* interf = InstanceKlass::cast(local_interfaces()->at(i)); |
0 | 908 assert(interf->is_interface(), "expected interface"); |
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909 interf->add_implementor(this_as_klass_oop); |
0 | 910 } |
911 } | |
912 | |
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913 bool InstanceKlass::can_be_primary_super_slow() const { |
0 | 914 if (is_interface()) |
915 return false; | |
916 else | |
917 return Klass::can_be_primary_super_slow(); | |
918 } | |
919 | |
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920 GrowableArray<Klass*>* InstanceKlass::compute_secondary_supers(int num_extra_slots) { |
0 | 921 // The secondaries are the implemented interfaces. |
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922 InstanceKlass* ik = InstanceKlass::cast(this); |
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923 Array<Klass*>* interfaces = ik->transitive_interfaces(); |
0 | 924 int num_secondaries = num_extra_slots + interfaces->length(); |
925 if (num_secondaries == 0) { | |
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926 // Must share this for correct bootstrapping! |
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927 set_secondary_supers(Universe::the_empty_klass_array()); |
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928 return NULL; |
0 | 929 } else if (num_extra_slots == 0) { |
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930 // The secondary super list is exactly the same as the transitive interfaces. |
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931 // Redefine classes has to be careful not to delete this! |
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932 set_secondary_supers(interfaces); |
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933 return NULL; |
0 | 934 } else { |
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935 // Copy transitive interfaces to a temporary growable array to be constructed |
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936 // into the secondary super list with extra slots. |
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937 GrowableArray<Klass*>* secondaries = new GrowableArray<Klass*>(interfaces->length()); |
0 | 938 for (int i = 0; i < interfaces->length(); i++) { |
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939 secondaries->push(interfaces->at(i)); |
0 | 940 } |
941 return secondaries; | |
942 } | |
943 } | |
944 | |
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945 bool InstanceKlass::compute_is_subtype_of(Klass* k) { |
6983 | 946 if (k->is_interface()) { |
0 | 947 return implements_interface(k); |
948 } else { | |
949 return Klass::compute_is_subtype_of(k); | |
950 } | |
951 } | |
952 | |
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953 bool InstanceKlass::implements_interface(Klass* k) const { |
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954 if (this == k) return true; |
6983 | 955 assert(k->is_interface(), "should be an interface class"); |
0 | 956 for (int i = 0; i < transitive_interfaces()->length(); i++) { |
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957 if (transitive_interfaces()->at(i) == k) { |
0 | 958 return true; |
959 } | |
960 } | |
961 return false; | |
962 } | |
963 | |
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964 objArrayOop InstanceKlass::allocate_objArray(int n, int length, TRAPS) { |
0 | 965 if (length < 0) THROW_0(vmSymbols::java_lang_NegativeArraySizeException()); |
966 if (length > arrayOopDesc::max_array_length(T_OBJECT)) { | |
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967 report_java_out_of_memory("Requested array size exceeds VM limit"); |
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968 JvmtiExport::post_array_size_exhausted(); |
0 | 969 THROW_OOP_0(Universe::out_of_memory_error_array_size()); |
970 } | |
971 int size = objArrayOopDesc::object_size(length); | |
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972 Klass* ak = array_klass(n, CHECK_NULL); |
0 | 973 KlassHandle h_ak (THREAD, ak); |
974 objArrayOop o = | |
975 (objArrayOop)CollectedHeap::array_allocate(h_ak, size, length, CHECK_NULL); | |
976 return o; | |
977 } | |
978 | |
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979 instanceOop InstanceKlass::register_finalizer(instanceOop i, TRAPS) { |
0 | 980 if (TraceFinalizerRegistration) { |
981 tty->print("Registered "); | |
982 i->print_value_on(tty); | |
983 tty->print_cr(" (" INTPTR_FORMAT ") as finalizable", (address)i); | |
984 } | |
985 instanceHandle h_i(THREAD, i); | |
986 // Pass the handle as argument, JavaCalls::call expects oop as jobjects | |
987 JavaValue result(T_VOID); | |
988 JavaCallArguments args(h_i); | |
989 methodHandle mh (THREAD, Universe::finalizer_register_method()); | |
990 JavaCalls::call(&result, mh, &args, CHECK_NULL); | |
991 return h_i(); | |
992 } | |
993 | |
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994 instanceOop InstanceKlass::allocate_instance(TRAPS) { |
0 | 995 bool has_finalizer_flag = has_finalizer(); // Query before possible GC |
996 int size = size_helper(); // Query before forming handle. | |
997 | |
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998 KlassHandle h_k(THREAD, this); |
0 | 999 |
1000 instanceOop i; | |
1001 | |
1002 i = (instanceOop)CollectedHeap::obj_allocate(h_k, size, CHECK_NULL); | |
1003 if (has_finalizer_flag && !RegisterFinalizersAtInit) { | |
1004 i = register_finalizer(i, CHECK_NULL); | |
1005 } | |
1006 return i; | |
1007 } | |
1008 | |
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1009 void InstanceKlass::check_valid_for_instantiation(bool throwError, TRAPS) { |
0 | 1010 if (is_interface() || is_abstract()) { |
1011 ResourceMark rm(THREAD); | |
1012 THROW_MSG(throwError ? vmSymbols::java_lang_InstantiationError() | |
1013 : vmSymbols::java_lang_InstantiationException(), external_name()); | |
1014 } | |
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1015 if (this == SystemDictionary::Class_klass()) { |
0 | 1016 ResourceMark rm(THREAD); |
1017 THROW_MSG(throwError ? vmSymbols::java_lang_IllegalAccessError() | |
1018 : vmSymbols::java_lang_IllegalAccessException(), external_name()); | |
1019 } | |
1020 } | |
1021 | |
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1022 Klass* InstanceKlass::array_klass_impl(bool or_null, int n, TRAPS) { |
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1023 instanceKlassHandle this_oop(THREAD, this); |
0 | 1024 return array_klass_impl(this_oop, or_null, n, THREAD); |
1025 } | |
1026 | |
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1027 Klass* InstanceKlass::array_klass_impl(instanceKlassHandle this_oop, bool or_null, int n, TRAPS) { |
0 | 1028 if (this_oop->array_klasses() == NULL) { |
1029 if (or_null) return NULL; | |
1030 | |
1031 ResourceMark rm; | |
1032 JavaThread *jt = (JavaThread *)THREAD; | |
1033 { | |
1034 // Atomic creation of array_klasses | |
1035 MutexLocker mc(Compile_lock, THREAD); // for vtables | |
1036 MutexLocker ma(MultiArray_lock, THREAD); | |
1037 | |
1038 // Check if update has already taken place | |
1039 if (this_oop->array_klasses() == NULL) { | |
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1040 Klass* k = ObjArrayKlass::allocate_objArray_klass(this_oop->class_loader_data(), 1, this_oop, CHECK_NULL); |
0 | 1041 this_oop->set_array_klasses(k); |
1042 } | |
1043 } | |
1044 } | |
1045 // _this will always be set at this point | |
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1046 ObjArrayKlass* oak = (ObjArrayKlass*)this_oop->array_klasses(); |
0 | 1047 if (or_null) { |
1048 return oak->array_klass_or_null(n); | |
1049 } | |
1050 return oak->array_klass(n, CHECK_NULL); | |
1051 } | |
1052 | |
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1053 Klass* InstanceKlass::array_klass_impl(bool or_null, TRAPS) { |
0 | 1054 return array_klass_impl(or_null, 1, THREAD); |
1055 } | |
1056 | |
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1057 void InstanceKlass::call_class_initializer(TRAPS) { |
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1058 instanceKlassHandle ik (THREAD, this); |
0 | 1059 call_class_initializer_impl(ik, THREAD); |
1060 } | |
1061 | |
1062 static int call_class_initializer_impl_counter = 0; // for debugging | |
1063 | |
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1064 Method* InstanceKlass::class_initializer() { |
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1065 Method* clinit = find_method( |
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1066 vmSymbols::class_initializer_name(), vmSymbols::void_method_signature()); |
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1067 if (clinit != NULL && clinit->has_valid_initializer_flags()) { |
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1068 return clinit; |
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1069 } |
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1070 return NULL; |
0 | 1071 } |
1072 | |
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1073 void InstanceKlass::call_class_initializer_impl(instanceKlassHandle this_oop, TRAPS) { |
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1074 if (ReplayCompiles && |
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1075 (ReplaySuppressInitializers == 1 || |
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1076 ReplaySuppressInitializers >= 2 && this_oop->class_loader() != NULL)) { |
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1077 // Hide the existence of the initializer for the purpose of replaying the compile |
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1078 return; |
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1079 } |
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1080 |
0 | 1081 methodHandle h_method(THREAD, this_oop->class_initializer()); |
1082 assert(!this_oop->is_initialized(), "we cannot initialize twice"); | |
1083 if (TraceClassInitialization) { | |
1084 tty->print("%d Initializing ", call_class_initializer_impl_counter++); | |
1085 this_oop->name()->print_value(); | |
1086 tty->print_cr("%s (" INTPTR_FORMAT ")", h_method() == NULL ? "(no method)" : "", (address)this_oop()); | |
1087 } | |
1088 if (h_method() != NULL) { | |
1089 JavaCallArguments args; // No arguments | |
1090 JavaValue result(T_VOID); | |
1091 JavaCalls::call(&result, h_method, &args, CHECK); // Static call (no args) | |
1092 } | |
1093 } | |
1094 | |
1095 | |
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1096 void InstanceKlass::mask_for(methodHandle method, int bci, |
0 | 1097 InterpreterOopMap* entry_for) { |
1098 // Dirty read, then double-check under a lock. | |
1099 if (_oop_map_cache == NULL) { | |
1100 // Otherwise, allocate a new one. | |
1101 MutexLocker x(OopMapCacheAlloc_lock); | |
1102 // First time use. Allocate a cache in C heap | |
1103 if (_oop_map_cache == NULL) { | |
1104 _oop_map_cache = new OopMapCache(); | |
1105 } | |
1106 } | |
1107 // _oop_map_cache is constant after init; lookup below does is own locking. | |
1108 _oop_map_cache->lookup(method, bci, entry_for); | |
1109 } | |
1110 | |
1111 | |
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1112 bool InstanceKlass::find_local_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const { |
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1113 for (JavaFieldStream fs(this); !fs.done(); fs.next()) { |
3938 | 1114 Symbol* f_name = fs.name(); |
1115 Symbol* f_sig = fs.signature(); | |
0 | 1116 if (f_name == name && f_sig == sig) { |
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1117 fd->initialize(const_cast<InstanceKlass*>(this), fs.index()); |
0 | 1118 return true; |
1119 } | |
1120 } | |
1121 return false; | |
1122 } | |
1123 | |
1124 | |
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1125 Klass* InstanceKlass::find_interface_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const { |
0 | 1126 const int n = local_interfaces()->length(); |
1127 for (int i = 0; i < n; i++) { | |
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1128 Klass* intf1 = local_interfaces()->at(i); |
6983 | 1129 assert(intf1->is_interface(), "just checking type"); |
0 | 1130 // search for field in current interface |
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1131 if (InstanceKlass::cast(intf1)->find_local_field(name, sig, fd)) { |
0 | 1132 assert(fd->is_static(), "interface field must be static"); |
1133 return intf1; | |
1134 } | |
1135 // search for field in direct superinterfaces | |
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1136 Klass* intf2 = InstanceKlass::cast(intf1)->find_interface_field(name, sig, fd); |
0 | 1137 if (intf2 != NULL) return intf2; |
1138 } | |
1139 // otherwise field lookup fails | |
1140 return NULL; | |
1141 } | |
1142 | |
1143 | |
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1144 Klass* InstanceKlass::find_field(Symbol* name, Symbol* sig, 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 return const_cast<InstanceKlass*>(this); |
0 | 1149 } |
1150 // 2) search for field recursively in direct superinterfaces | |
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1151 { Klass* intf = find_interface_field(name, sig, fd); |
0 | 1152 if (intf != NULL) return intf; |
1153 } | |
1154 // 3) apply field lookup recursively if superclass exists | |
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1155 { Klass* supr = super(); |
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1156 if (supr != NULL) return InstanceKlass::cast(supr)->find_field(name, sig, fd); |
0 | 1157 } |
1158 // 4) otherwise field lookup fails | |
1159 return NULL; | |
1160 } | |
1161 | |
1162 | |
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1163 Klass* InstanceKlass::find_field(Symbol* name, Symbol* sig, bool is_static, fieldDescriptor* fd) const { |
0 | 1164 // search order according to newest JVM spec (5.4.3.2, p.167). |
1165 // 1) search for field in current klass | |
1166 if (find_local_field(name, sig, fd)) { | |
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1167 if (fd->is_static() == is_static) return const_cast<InstanceKlass*>(this); |
0 | 1168 } |
1169 // 2) search for field recursively in direct superinterfaces | |
1170 if (is_static) { | |
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1171 Klass* intf = find_interface_field(name, sig, fd); |
0 | 1172 if (intf != NULL) return intf; |
1173 } | |
1174 // 3) apply field lookup recursively if superclass exists | |
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1175 { Klass* supr = super(); |
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1176 if (supr != NULL) return InstanceKlass::cast(supr)->find_field(name, sig, is_static, fd); |
0 | 1177 } |
1178 // 4) otherwise field lookup fails | |
1179 return NULL; | |
1180 } | |
1181 | |
1182 | |
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1183 bool InstanceKlass::find_local_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const { |
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1184 for (JavaFieldStream fs(this); !fs.done(); fs.next()) { |
3938 | 1185 if (fs.offset() == offset) { |
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1186 fd->initialize(const_cast<InstanceKlass*>(this), fs.index()); |
0 | 1187 if (fd->is_static() == is_static) return true; |
1188 } | |
1189 } | |
1190 return false; | |
1191 } | |
1192 | |
1193 | |
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1194 bool InstanceKlass::find_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const { |
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1195 Klass* klass = const_cast<InstanceKlass*>(this); |
0 | 1196 while (klass != NULL) { |
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1197 if (InstanceKlass::cast(klass)->find_local_field_from_offset(offset, is_static, fd)) { |
0 | 1198 return true; |
1199 } | |
6983 | 1200 klass = klass->super(); |
0 | 1201 } |
1202 return false; | |
1203 } | |
1204 | |
1205 | |
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1206 void InstanceKlass::methods_do(void f(Method* method)) { |
0 | 1207 int len = methods()->length(); |
1208 for (int index = 0; index < len; index++) { | |
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1209 Method* m = methods()->at(index); |
0 | 1210 assert(m->is_method(), "must be method"); |
1211 f(m); | |
1212 } | |
1213 } | |
1214 | |
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1215 |
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1216 void InstanceKlass::do_local_static_fields(FieldClosure* cl) { |
3938 | 1217 for (JavaFieldStream fs(this); !fs.done(); fs.next()) { |
1218 if (fs.access_flags().is_static()) { | |
1219 fieldDescriptor fd; | |
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1220 fd.initialize(this, fs.index()); |
3938 | 1221 cl->do_field(&fd); |
1222 } | |
0 | 1223 } |
1224 } | |
1225 | |
1226 | |
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1227 void InstanceKlass::do_local_static_fields(void f(fieldDescriptor*, TRAPS), TRAPS) { |
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1228 instanceKlassHandle h_this(THREAD, this); |
0 | 1229 do_local_static_fields_impl(h_this, f, CHECK); |
1230 } | |
1231 | |
1232 | |
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1233 void InstanceKlass::do_local_static_fields_impl(instanceKlassHandle this_oop, void f(fieldDescriptor* fd, TRAPS), TRAPS) { |
3938 | 1234 for (JavaFieldStream fs(this_oop()); !fs.done(); fs.next()) { |
1235 if (fs.access_flags().is_static()) { | |
1236 fieldDescriptor fd; | |
1237 fd.initialize(this_oop(), fs.index()); | |
1238 f(&fd, CHECK); | |
1239 } | |
0 | 1240 } |
1241 } | |
1242 | |
1243 | |
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1244 static int compare_fields_by_offset(int* a, int* b) { |
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1245 return a[0] - b[0]; |
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1246 } |
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1247 |
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1248 void InstanceKlass::do_nonstatic_fields(FieldClosure* cl) { |
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1249 InstanceKlass* super = superklass(); |
0 | 1250 if (super != NULL) { |
1251 super->do_nonstatic_fields(cl); | |
1252 } | |
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1253 fieldDescriptor fd; |
3938 | 1254 int length = java_fields_count(); |
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1255 // In DebugInfo nonstatic fields are sorted by offset. |
6197 | 1256 int* fields_sorted = NEW_C_HEAP_ARRAY(int, 2*(length+1), mtClass); |
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1257 int j = 0; |
3938 | 1258 for (int i = 0; i < length; i += 1) { |
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1259 fd.initialize(this, i); |
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1260 if (!fd.is_static()) { |
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1261 fields_sorted[j + 0] = fd.offset(); |
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1262 fields_sorted[j + 1] = i; |
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1263 j += 2; |
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1264 } |
0 | 1265 } |
44
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1266 if (j > 0) { |
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1267 length = j; |
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1268 // _sort_Fn is defined in growableArray.hpp. |
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1269 qsort(fields_sorted, length/2, 2*sizeof(int), (_sort_Fn)compare_fields_by_offset); |
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1270 for (int i = 0; i < length; i += 2) { |
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1271 fd.initialize(this, fields_sorted[i + 1]); |
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1272 assert(!fd.is_static() && fd.offset() == fields_sorted[i], "only nonstatic fields"); |
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1273 cl->do_field(&fd); |
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1274 } |
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1275 } |
6197 | 1276 FREE_C_HEAP_ARRAY(int, fields_sorted, mtClass); |
0 | 1277 } |
1278 | |
1279 | |
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1280 void InstanceKlass::array_klasses_do(void f(Klass* k, TRAPS), TRAPS) { |
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1281 if (array_klasses() != NULL) |
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1282 ArrayKlass::cast(array_klasses())->array_klasses_do(f, THREAD); |
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1283 } |
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1284 |
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1285 void InstanceKlass::array_klasses_do(void f(Klass* k)) { |
0 | 1286 if (array_klasses() != NULL) |
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1287 ArrayKlass::cast(array_klasses())->array_klasses_do(f); |
0 | 1288 } |
1289 | |
1290 | |
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1291 void InstanceKlass::with_array_klasses_do(void f(Klass* k)) { |
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1292 f(this); |
0 | 1293 array_klasses_do(f); |
1294 } | |
1295 | |
1296 #ifdef ASSERT | |
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1297 static int linear_search(Array<Method*>* methods, Symbol* name, Symbol* signature) { |
0 | 1298 int len = methods->length(); |
1299 for (int index = 0; index < len; index++) { | |
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1300 Method* m = methods->at(index); |
0 | 1301 assert(m->is_method(), "must be method"); |
1302 if (m->signature() == signature && m->name() == name) { | |
1303 return index; | |
1304 } | |
1305 } | |
1306 return -1; | |
1307 } | |
1308 #endif | |
1309 | |
6934 | 1310 static int binary_search(Array<Method*>* methods, Symbol* name) { |
0 | 1311 int len = methods->length(); |
1312 // methods are sorted, so do binary search | |
1313 int l = 0; | |
1314 int h = len - 1; | |
1315 while (l <= h) { | |
1316 int mid = (l + h) >> 1; | |
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1317 Method* m = methods->at(mid); |
0 | 1318 assert(m->is_method(), "must be method"); |
1319 int res = m->name()->fast_compare(name); | |
1320 if (res == 0) { | |
6934 | 1321 return mid; |
0 | 1322 } else if (res < 0) { |
1323 l = mid + 1; | |
1324 } else { | |
1325 h = mid - 1; | |
1326 } | |
1327 } | |
6934 | 1328 return -1; |
1329 } | |
1330 | |
1331 Method* InstanceKlass::find_method(Symbol* name, Symbol* signature) const { | |
1332 return InstanceKlass::find_method(methods(), name, signature); | |
1333 } | |
1334 | |
1335 Method* InstanceKlass::find_method( | |
1336 Array<Method*>* methods, Symbol* name, Symbol* signature) { | |
1337 int hit = binary_search(methods, name); | |
1338 if (hit != -1) { | |
1339 Method* m = methods->at(hit); | |
1340 // Do linear search to find matching signature. First, quick check | |
1341 // for common case | |
1342 if (m->signature() == signature) return m; | |
1343 // search downwards through overloaded methods | |
1344 int i; | |
1345 for (i = hit - 1; i >= 0; --i) { | |
1346 Method* m = methods->at(i); | |
1347 assert(m->is_method(), "must be method"); | |
1348 if (m->name() != name) break; | |
1349 if (m->signature() == signature) return m; | |
1350 } | |
1351 // search upwards | |
1352 for (i = hit + 1; i < methods->length(); ++i) { | |
1353 Method* m = methods->at(i); | |
1354 assert(m->is_method(), "must be method"); | |
1355 if (m->name() != name) break; | |
1356 if (m->signature() == signature) return m; | |
1357 } | |
1358 // not found | |
0 | 1359 #ifdef ASSERT |
6934 | 1360 int index = linear_search(methods, name, signature); |
1361 assert(index == -1, err_msg("binary search should have found entry %d", index)); | |
0 | 1362 #endif |
6934 | 1363 } |
0 | 1364 return NULL; |
1365 } | |
1366 | |
6934 | 1367 int InstanceKlass::find_method_by_name(Symbol* name, int* end) { |
1368 return find_method_by_name(methods(), name, end); | |
1369 } | |
1370 | |
1371 int InstanceKlass::find_method_by_name( | |
1372 Array<Method*>* methods, Symbol* name, int* end_ptr) { | |
1373 assert(end_ptr != NULL, "just checking"); | |
1374 int start = binary_search(methods, name); | |
1375 int end = start + 1; | |
1376 if (start != -1) { | |
1377 while (start - 1 >= 0 && (methods->at(start - 1))->name() == name) --start; | |
1378 while (end < methods->length() && (methods->at(end))->name() == name) ++end; | |
1379 *end_ptr = end; | |
1380 return start; | |
1381 } | |
1382 return -1; | |
1383 } | |
1384 | |
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1385 Method* InstanceKlass::uncached_lookup_method(Symbol* name, Symbol* signature) const { |
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1386 Klass* klass = const_cast<InstanceKlass*>(this); |
0 | 1387 while (klass != NULL) { |
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1388 Method* method = InstanceKlass::cast(klass)->find_method(name, signature); |
0 | 1389 if (method != NULL) return method; |
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1390 klass = InstanceKlass::cast(klass)->super(); |
0 | 1391 } |
1392 return NULL; | |
1393 } | |
1394 | |
1395 // lookup a method in all the interfaces that this class implements | |
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1396 Method* InstanceKlass::lookup_method_in_all_interfaces(Symbol* name, |
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1397 Symbol* signature) const { |
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1398 Array<Klass*>* all_ifs = transitive_interfaces(); |
0 | 1399 int num_ifs = all_ifs->length(); |
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1400 InstanceKlass *ik = NULL; |
0 | 1401 for (int i = 0; i < num_ifs; i++) { |
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1402 ik = InstanceKlass::cast(all_ifs->at(i)); |
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1403 Method* m = ik->lookup_method(name, signature); |
0 | 1404 if (m != NULL) { |
1405 return m; | |
1406 } | |
1407 } | |
1408 return NULL; | |
1409 } | |
1410 | |
1411 /* jni_id_for_impl for jfieldIds only */ | |
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1412 JNIid* InstanceKlass::jni_id_for_impl(instanceKlassHandle this_oop, int offset) { |
0 | 1413 MutexLocker ml(JfieldIdCreation_lock); |
1414 // Retry lookup after we got the lock | |
1415 JNIid* probe = this_oop->jni_ids() == NULL ? NULL : this_oop->jni_ids()->find(offset); | |
1416 if (probe == NULL) { | |
1417 // Slow case, allocate new static field identifier | |
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1418 probe = new JNIid(this_oop(), offset, this_oop->jni_ids()); |
0 | 1419 this_oop->set_jni_ids(probe); |
1420 } | |
1421 return probe; | |
1422 } | |
1423 | |
1424 | |
1425 /* jni_id_for for jfieldIds only */ | |
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1426 JNIid* InstanceKlass::jni_id_for(int offset) { |
0 | 1427 JNIid* probe = jni_ids() == NULL ? NULL : jni_ids()->find(offset); |
1428 if (probe == NULL) { | |
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1429 probe = jni_id_for_impl(this, offset); |
0 | 1430 } |
1431 return probe; | |
1432 } | |
1433 | |
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1434 u2 InstanceKlass::enclosing_method_data(int offset) { |
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1435 Array<jushort>* inner_class_list = inner_classes(); |
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1436 if (inner_class_list == NULL) { |
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1437 return 0; |
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1438 } |
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1439 int length = inner_class_list->length(); |
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1440 if (length % inner_class_next_offset == 0) { |
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1441 return 0; |
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1442 } else { |
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1443 int index = length - enclosing_method_attribute_size; |
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1444 assert(offset < enclosing_method_attribute_size, "invalid offset"); |
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1445 return inner_class_list->at(index + offset); |
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1446 } |
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1447 } |
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1448 |
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1449 void InstanceKlass::set_enclosing_method_indices(u2 class_index, |
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1450 u2 method_index) { |
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1451 Array<jushort>* inner_class_list = inner_classes(); |
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1452 assert (inner_class_list != NULL, "_inner_classes list is not set up"); |
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1453 int length = inner_class_list->length(); |
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1454 if (length % inner_class_next_offset == enclosing_method_attribute_size) { |
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1455 int index = length - enclosing_method_attribute_size; |
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1456 inner_class_list->at_put( |
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1457 index + enclosing_method_class_index_offset, class_index); |
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1458 inner_class_list->at_put( |
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1459 index + enclosing_method_method_index_offset, method_index); |
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1460 } |
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1461 } |
0 | 1462 |
1463 // Lookup or create a jmethodID. | |
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1464 // This code is called by the VMThread and JavaThreads so the |
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1465 // locking has to be done very carefully to avoid deadlocks |
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1466 // and/or other cache consistency problems. |
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1467 // |
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1468 jmethodID InstanceKlass::get_jmethod_id(instanceKlassHandle ik_h, methodHandle method_h) { |
0 | 1469 size_t idnum = (size_t)method_h->method_idnum(); |
1470 jmethodID* jmeths = ik_h->methods_jmethod_ids_acquire(); | |
1471 size_t length = 0; | |
1472 jmethodID id = NULL; | |
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1473 |
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1474 // We use a double-check locking idiom here because this cache is |
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1475 // performance sensitive. In the normal system, this cache only |
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1476 // transitions from NULL to non-NULL which is safe because we use |
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1477 // release_set_methods_jmethod_ids() to advertise the new cache. |
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1478 // A partially constructed cache should never be seen by a racing |
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1479 // thread. We also use release_store_ptr() to save a new jmethodID |
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1480 // in the cache so a partially constructed jmethodID should never be |
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1481 // seen either. Cache reads of existing jmethodIDs proceed without a |
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1482 // lock, but cache writes of a new jmethodID requires uniqueness and |
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1483 // creation of the cache itself requires no leaks so a lock is |
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1484 // generally acquired in those two cases. |
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1485 // |
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1486 // If the RedefineClasses() API has been used, then this cache can |
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1487 // grow and we'll have transitions from non-NULL to bigger non-NULL. |
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1488 // Cache creation requires no leaks and we require safety between all |
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1489 // cache accesses and freeing of the old cache so a lock is generally |
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1490 // acquired when the RedefineClasses() API has been used. |
0 | 1491 |
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1492 if (jmeths != NULL) { |
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1493 // the cache already exists |
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1494 if (!ik_h->idnum_can_increment()) { |
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1495 // the cache can't grow so we can just get the current values |
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1496 get_jmethod_id_length_value(jmeths, idnum, &length, &id); |
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1497 } else { |
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1498 // cache can grow so we have to be more careful |
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1499 if (Threads::number_of_threads() == 0 || |
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1500 SafepointSynchronize::is_at_safepoint()) { |
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1501 // we're single threaded or at a safepoint - no locking needed |
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1502 get_jmethod_id_length_value(jmeths, idnum, &length, &id); |
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1503 } else { |
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1504 MutexLocker ml(JmethodIdCreation_lock); |
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1505 get_jmethod_id_length_value(jmeths, idnum, &length, &id); |
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1506 } |
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1507 } |
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1508 } |
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1509 // implied else: |
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1510 // we need to allocate a cache so default length and id values are good |
0 | 1511 |
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1512 if (jmeths == NULL || // no cache yet |
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1513 length <= idnum || // cache is too short |
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1514 id == NULL) { // cache doesn't contain entry |
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1515 |
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1516 // This function can be called by the VMThread so we have to do all |
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1517 // things that might block on a safepoint before grabbing the lock. |
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1518 // Otherwise, we can deadlock with the VMThread or have a cache |
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1519 // consistency issue. These vars keep track of what we might have |
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1520 // to free after the lock is dropped. |
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1521 jmethodID to_dealloc_id = NULL; |
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1522 jmethodID* to_dealloc_jmeths = NULL; |
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1523 |
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1524 // may not allocate new_jmeths or use it if we allocate it |
0 | 1525 jmethodID* new_jmeths = NULL; |
1526 if (length <= idnum) { | |
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1527 // allocate a new cache that might be used |
0 | 1528 size_t size = MAX2(idnum+1, (size_t)ik_h->idnum_allocated_count()); |
6197 | 1529 new_jmeths = NEW_C_HEAP_ARRAY(jmethodID, size+1, mtClass); |
0 | 1530 memset(new_jmeths, 0, (size+1)*sizeof(jmethodID)); |
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1531 // cache size is stored in element[0], other elements offset by one |
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1532 new_jmeths[0] = (jmethodID)size; |
0 | 1533 } |
1534 | |
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1535 // allocate a new jmethodID that might be used |
0 | 1536 jmethodID new_id = NULL; |
1537 if (method_h->is_old() && !method_h->is_obsolete()) { | |
1538 // The method passed in is old (but not obsolete), we need to use the current version | |
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1539 Method* current_method = ik_h->method_with_idnum((int)idnum); |
0 | 1540 assert(current_method != NULL, "old and but not obsolete, so should exist"); |
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1541 new_id = Method::make_jmethod_id(ik_h->class_loader_data(), current_method); |
0 | 1542 } else { |
1543 // It is the current version of the method or an obsolete method, | |
1544 // use the version passed in | |
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1545 new_id = Method::make_jmethod_id(ik_h->class_loader_data(), method_h()); |
0 | 1546 } |
1547 | |
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1548 if (Threads::number_of_threads() == 0 || |
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1549 SafepointSynchronize::is_at_safepoint()) { |
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1550 // we're single threaded or at a safepoint - no locking needed |
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1551 id = get_jmethod_id_fetch_or_update(ik_h, idnum, new_id, new_jmeths, |
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1552 &to_dealloc_id, &to_dealloc_jmeths); |
49
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1553 } else { |
0 | 1554 MutexLocker ml(JmethodIdCreation_lock); |
977
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1555 id = get_jmethod_id_fetch_or_update(ik_h, idnum, new_id, new_jmeths, |
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1556 &to_dealloc_id, &to_dealloc_jmeths); |
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1557 } |
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1558 |
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1559 // The lock has been dropped so we can free resources. |
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1560 // Free up either the old cache or the new cache if we allocated one. |
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1561 if (to_dealloc_jmeths != NULL) { |
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1562 FreeHeap(to_dealloc_jmeths); |
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1563 } |
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1564 // free up the new ID since it wasn't needed |
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1565 if (to_dealloc_id != NULL) { |
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1566 Method::destroy_jmethod_id(ik_h->class_loader_data(), to_dealloc_id); |
49
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1567 } |
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1568 } |
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1569 return id; |
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1570 } |
0 | 1571 |
49
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1572 |
977
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1573 // Common code to fetch the jmethodID from the cache or update the |
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1574 // cache with the new jmethodID. This function should never do anything |
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1575 // that causes the caller to go to a safepoint or we can deadlock with |
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1576 // the VMThread or have cache consistency issues. |
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1577 // |
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1578 jmethodID InstanceKlass::get_jmethod_id_fetch_or_update( |
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1579 instanceKlassHandle ik_h, size_t idnum, jmethodID new_id, |
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1580 jmethodID* new_jmeths, jmethodID* to_dealloc_id_p, |
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1581 jmethodID** to_dealloc_jmeths_p) { |
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1582 assert(new_id != NULL, "sanity check"); |
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1583 assert(to_dealloc_id_p != NULL, "sanity check"); |
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|
1584 assert(to_dealloc_jmeths_p != NULL, "sanity check"); |
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1585 assert(Threads::number_of_threads() == 0 || |
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1586 SafepointSynchronize::is_at_safepoint() || |
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1587 JmethodIdCreation_lock->owned_by_self(), "sanity check"); |
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1588 |
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1589 // reacquire the cache - we are locked, single threaded or at a safepoint |
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1590 jmethodID* jmeths = ik_h->methods_jmethod_ids_acquire(); |
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1591 jmethodID id = NULL; |
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1592 size_t length = 0; |
0 | 1593 |
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1594 if (jmeths == NULL || // no cache yet |
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1595 (length = (size_t)jmeths[0]) <= idnum) { // cache is too short |
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1596 if (jmeths != NULL) { |
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1597 // copy any existing entries from the old cache |
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1598 for (size_t index = 0; index < length; index++) { |
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1599 new_jmeths[index+1] = jmeths[index+1]; |
0 | 1600 } |
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1601 *to_dealloc_jmeths_p = jmeths; // save old cache for later delete |
0 | 1602 } |
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1603 ik_h->release_set_methods_jmethod_ids(jmeths = new_jmeths); |
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1604 } else { |
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1605 // fetch jmethodID (if any) from the existing cache |
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1606 id = jmeths[idnum+1]; |
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1607 *to_dealloc_jmeths_p = new_jmeths; // save new cache for later delete |
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1608 } |
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1609 if (id == NULL) { |
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1610 // No matching jmethodID in the existing cache or we have a new |
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1611 // cache or we just grew the cache. This cache write is done here |
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1612 // by the first thread to win the foot race because a jmethodID |
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1613 // needs to be unique once it is generally available. |
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1614 id = new_id; |
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1615 |
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1616 // The jmethodID cache can be read while unlocked so we have to |
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1617 // make sure the new jmethodID is complete before installing it |
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1618 // in the cache. |
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1619 OrderAccess::release_store_ptr(&jmeths[idnum+1], id); |
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1620 } else { |
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1621 *to_dealloc_id_p = new_id; // save new id for later delete |
0 | 1622 } |
1623 return id; | |
1624 } | |
1625 | |
1626 | |
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1627 // Common code to get the jmethodID cache length and the jmethodID |
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1628 // value at index idnum if there is one. |
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1629 // |
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1630 void InstanceKlass::get_jmethod_id_length_value(jmethodID* cache, |
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1631 size_t idnum, size_t *length_p, jmethodID* id_p) { |
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1632 assert(cache != NULL, "sanity check"); |
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1633 assert(length_p != NULL, "sanity check"); |
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1634 assert(id_p != NULL, "sanity check"); |
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1635 |
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1636 // cache size is stored in element[0], other elements offset by one |
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1637 *length_p = (size_t)cache[0]; |
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1638 if (*length_p <= idnum) { // cache is too short |
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1639 *id_p = NULL; |
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1640 } else { |
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1641 *id_p = cache[idnum+1]; // fetch jmethodID (if any) |
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1642 } |
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1643 } |
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1644 |
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1645 |
0 | 1646 // Lookup a jmethodID, NULL if not found. Do no blocking, no allocations, no handles |
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1647 jmethodID InstanceKlass::jmethod_id_or_null(Method* method) { |
0 | 1648 size_t idnum = (size_t)method->method_idnum(); |
1649 jmethodID* jmeths = methods_jmethod_ids_acquire(); | |
1650 size_t length; // length assigned as debugging crumb | |
1651 jmethodID id = NULL; | |
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1652 if (jmeths != NULL && // If there is a cache |
0 | 1653 (length = (size_t)jmeths[0]) > idnum) { // and if it is long enough, |
1654 id = jmeths[idnum+1]; // Look up the id (may be NULL) | |
1655 } | |
1656 return id; | |
1657 } | |
1658 | |
1659 | |
1660 // Cache an itable index | |
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1661 void InstanceKlass::set_cached_itable_index(size_t idnum, int index) { |
0 | 1662 int* indices = methods_cached_itable_indices_acquire(); |
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1663 int* to_dealloc_indices = NULL; |
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1664 |
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1665 // We use a double-check locking idiom here because this cache is |
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1666 // performance sensitive. In the normal system, this cache only |
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1667 // transitions from NULL to non-NULL which is safe because we use |
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1668 // release_set_methods_cached_itable_indices() to advertise the |
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1669 // new cache. A partially constructed cache should never be seen |
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1670 // by a racing thread. Cache reads and writes proceed without a |
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1671 // lock, but creation of the cache itself requires no leaks so a |
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1672 // lock is generally acquired in that case. |
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1673 // |
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1674 // If the RedefineClasses() API has been used, then this cache can |
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1675 // grow and we'll have transitions from non-NULL to bigger non-NULL. |
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1676 // Cache creation requires no leaks and we require safety between all |
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1677 // cache accesses and freeing of the old cache so a lock is generally |
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1678 // acquired when the RedefineClasses() API has been used. |
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1679 |
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1680 if (indices == NULL || idnum_can_increment()) { |
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1681 // we need a cache or the cache can grow |
0 | 1682 MutexLocker ml(JNICachedItableIndex_lock); |
977
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1683 // reacquire the cache to see if another thread already did the work |
0 | 1684 indices = methods_cached_itable_indices_acquire(); |
1685 size_t length = 0; | |
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1686 // cache size is stored in element[0], other elements offset by one |
0 | 1687 if (indices == NULL || (length = (size_t)indices[0]) <= idnum) { |
1688 size_t size = MAX2(idnum+1, (size_t)idnum_allocated_count()); | |
6197 | 1689 int* new_indices = NEW_C_HEAP_ARRAY(int, size+1, mtClass); |
977
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1690 new_indices[0] = (int)size; |
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1691 // copy any existing entries |
0 | 1692 size_t i; |
1693 for (i = 0; i < length; i++) { | |
1694 new_indices[i+1] = indices[i+1]; | |
1695 } | |
1696 // Set all the rest to -1 | |
1697 for (i = length; i < size; i++) { | |
1698 new_indices[i+1] = -1; | |
1699 } | |
1700 if (indices != NULL) { | |
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1701 // We have an old cache to delete so save it for after we |
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1702 // drop the lock. |
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1703 to_dealloc_indices = indices; |
0 | 1704 } |
1705 release_set_methods_cached_itable_indices(indices = new_indices); | |
1706 } | |
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1707 |
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1708 if (idnum_can_increment()) { |
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1709 // this cache can grow so we have to write to it safely |
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1710 indices[idnum+1] = index; |
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1711 } |
0 | 1712 } else { |
1713 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); | |
1714 } | |
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1715 |
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1716 if (!idnum_can_increment()) { |
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1717 // The cache cannot grow and this JNI itable index value does not |
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1718 // have to be unique like a jmethodID. If there is a race to set it, |
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1719 // it doesn't matter. |
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1720 indices[idnum+1] = index; |
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1721 } |
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1722 |
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1723 if (to_dealloc_indices != NULL) { |
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1724 // we allocated a new cache so free the old one |
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1725 FreeHeap(to_dealloc_indices); |
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1726 } |
0 | 1727 } |
1728 | |
1729 | |
1730 // Retrieve a cached itable index | |
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1731 int InstanceKlass::cached_itable_index(size_t idnum) { |
0 | 1732 int* indices = methods_cached_itable_indices_acquire(); |
1733 if (indices != NULL && ((size_t)indices[0]) > idnum) { | |
1734 // indices exist and are long enough, retrieve possible cached | |
1735 return indices[idnum+1]; | |
1736 } | |
1737 return -1; | |
1738 } | |
1739 | |
1740 | |
1741 // | |
1742 // Walk the list of dependent nmethods searching for nmethods which | |
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1743 // are dependent on the changes that were passed in and mark them for |
0 | 1744 // deoptimization. Returns the number of nmethods found. |
1745 // | |
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1746 int InstanceKlass::mark_dependent_nmethods(DepChange& changes) { |
0 | 1747 assert_locked_or_safepoint(CodeCache_lock); |
1748 int found = 0; | |
1749 nmethodBucket* b = _dependencies; | |
1750 while (b != NULL) { | |
1751 nmethod* nm = b->get_nmethod(); | |
1752 // since dependencies aren't removed until an nmethod becomes a zombie, | |
1753 // the dependency list may contain nmethods which aren't alive. | |
1754 if (nm->is_alive() && !nm->is_marked_for_deoptimization() && nm->check_dependency_on(changes)) { | |
1755 if (TraceDependencies) { | |
1756 ResourceMark rm; | |
1757 tty->print_cr("Marked for deoptimization"); | |
1758 tty->print_cr(" context = %s", this->external_name()); | |
1759 changes.print(); | |
1760 nm->print(); | |
1761 nm->print_dependencies(); | |
1762 } | |
1763 nm->mark_for_deoptimization(); | |
1764 found++; | |
1765 } | |
1766 b = b->next(); | |
1767 } | |
1768 return found; | |
1769 } | |
1770 | |
1771 | |
1772 // | |
1773 // Add an nmethodBucket to the list of dependencies for this nmethod. | |
1774 // It's possible that an nmethod has multiple dependencies on this klass | |
1775 // so a count is kept for each bucket to guarantee that creation and | |
1776 // deletion of dependencies is consistent. | |
1777 // | |
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1778 void InstanceKlass::add_dependent_nmethod(nmethod* nm) { |
0 | 1779 assert_locked_or_safepoint(CodeCache_lock); |
1780 nmethodBucket* b = _dependencies; | |
1781 nmethodBucket* last = NULL; | |
1782 while (b != NULL) { | |
1783 if (nm == b->get_nmethod()) { | |
1784 b->increment(); | |
1785 return; | |
1786 } | |
1787 b = b->next(); | |
1788 } | |
1789 _dependencies = new nmethodBucket(nm, _dependencies); | |
1790 } | |
1791 | |
1792 | |
1793 // | |
1794 // Decrement count of the nmethod in the dependency list and remove | |
1795 // the bucket competely when the count goes to 0. This method must | |
1796 // find a corresponding bucket otherwise there's a bug in the | |
1797 // recording of dependecies. | |
1798 // | |
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1799 void InstanceKlass::remove_dependent_nmethod(nmethod* nm) { |
0 | 1800 assert_locked_or_safepoint(CodeCache_lock); |
1801 nmethodBucket* b = _dependencies; | |
1802 nmethodBucket* last = NULL; | |
1803 while (b != NULL) { | |
1804 if (nm == b->get_nmethod()) { | |
1805 if (b->decrement() == 0) { | |
1806 if (last == NULL) { | |
1807 _dependencies = b->next(); | |
1808 } else { | |
1809 last->set_next(b->next()); | |
1810 } | |
1811 delete b; | |
1812 } | |
1813 return; | |
1814 } | |
1815 last = b; | |
1816 b = b->next(); | |
1817 } | |
1818 #ifdef ASSERT | |
1819 tty->print_cr("### %s can't find dependent nmethod:", this->external_name()); | |
1820 nm->print(); | |
1821 #endif // ASSERT | |
1822 ShouldNotReachHere(); | |
1823 } | |
1824 | |
1825 | |
1826 #ifndef PRODUCT | |
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1827 void InstanceKlass::print_dependent_nmethods(bool verbose) { |
0 | 1828 nmethodBucket* b = _dependencies; |
1829 int idx = 0; | |
1830 while (b != NULL) { | |
1831 nmethod* nm = b->get_nmethod(); | |
1832 tty->print("[%d] count=%d { ", idx++, b->count()); | |
1833 if (!verbose) { | |
1834 nm->print_on(tty, "nmethod"); | |
1835 tty->print_cr(" } "); | |
1836 } else { | |
1837 nm->print(); | |
1838 nm->print_dependencies(); | |
1839 tty->print_cr("--- } "); | |
1840 } | |
1841 b = b->next(); | |
1842 } | |
1843 } | |
1844 | |
1845 | |
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1846 bool InstanceKlass::is_dependent_nmethod(nmethod* nm) { |
0 | 1847 nmethodBucket* b = _dependencies; |
1848 while (b != NULL) { | |
1849 if (nm == b->get_nmethod()) { | |
1850 return true; | |
1851 } | |
1852 b = b->next(); | |
1853 } | |
1854 return false; | |
1855 } | |
1856 #endif //PRODUCT | |
1857 | |
1858 | |
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1859 // Garbage collection |
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1860 |
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1861 void InstanceKlass::oops_do(OopClosure* cl) { |
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1862 Klass::oops_do(cl); |
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1863 |
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1864 cl->do_oop(adr_protection_domain()); |
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1865 cl->do_oop(adr_signers()); |
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1866 cl->do_oop(adr_init_lock()); |
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1867 |
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1868 // Don't walk the arrays since they are walked from the ClassLoaderData objects. |
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1869 } |
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1870 |
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1871 #ifdef ASSERT |
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1872 template <class T> void assert_is_in(T *p) { |
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1873 T heap_oop = oopDesc::load_heap_oop(p); |
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1874 if (!oopDesc::is_null(heap_oop)) { |
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1875 oop o = oopDesc::decode_heap_oop_not_null(heap_oop); |
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1876 assert(Universe::heap()->is_in(o), "should be in heap"); |
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1877 } |
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1878 } |
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1879 template <class T> void assert_is_in_closed_subset(T *p) { |
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1880 T heap_oop = oopDesc::load_heap_oop(p); |
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1881 if (!oopDesc::is_null(heap_oop)) { |
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1882 oop o = oopDesc::decode_heap_oop_not_null(heap_oop); |
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1883 assert(Universe::heap()->is_in_closed_subset(o), |
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1884 err_msg("should be in closed *p " INTPTR_FORMAT " " INTPTR_FORMAT, (address)p, (address)o)); |
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1885 } |
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1886 } |
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1887 template <class T> void assert_is_in_reserved(T *p) { |
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1888 T heap_oop = oopDesc::load_heap_oop(p); |
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1889 if (!oopDesc::is_null(heap_oop)) { |
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1890 oop o = oopDesc::decode_heap_oop_not_null(heap_oop); |
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1891 assert(Universe::heap()->is_in_reserved(o), "should be in reserved"); |
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1892 } |
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1893 } |
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1894 template <class T> void assert_nothing(T *p) {} |
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1895 |
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1896 #else |
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1897 template <class T> void assert_is_in(T *p) {} |
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1898 template <class T> void assert_is_in_closed_subset(T *p) {} |
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1899 template <class T> void assert_is_in_reserved(T *p) {} |
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1900 template <class T> void assert_nothing(T *p) {} |
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1901 #endif // ASSERT |
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1902 |
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1903 // |
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1904 // Macros that iterate over areas of oops which are specialized on type of |
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1905 // oop pointer either narrow or wide, depending on UseCompressedOops |
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1906 // |
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1907 // Parameters are: |
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1908 // T - type of oop to point to (either oop or narrowOop) |
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1909 // start_p - starting pointer for region to iterate over |
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1910 // count - number of oops or narrowOops to iterate over |
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1911 // do_oop - action to perform on each oop (it's arbitrary C code which |
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1912 // makes it more efficient to put in a macro rather than making |
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1913 // it a template function) |
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1914 // assert_fn - assert function which is template function because performance |
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1915 // doesn't matter when enabled. |
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1916 #define InstanceKlass_SPECIALIZED_OOP_ITERATE( \ |
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1917 T, start_p, count, do_oop, \ |
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1918 assert_fn) \ |
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1919 { \ |
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1920 T* p = (T*)(start_p); \ |
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1921 T* const end = p + (count); \ |
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1922 while (p < end) { \ |
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1923 (assert_fn)(p); \ |
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1924 do_oop; \ |
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1925 ++p; \ |
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1926 } \ |
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1927 } |
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1928 |
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1929 #define InstanceKlass_SPECIALIZED_OOP_REVERSE_ITERATE( \ |
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1930 T, start_p, count, do_oop, \ |
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1931 assert_fn) \ |
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1932 { \ |
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1933 T* const start = (T*)(start_p); \ |
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1934 T* p = start + (count); \ |
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1935 while (start < p) { \ |
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1936 --p; \ |
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1937 (assert_fn)(p); \ |
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1938 do_oop; \ |
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1939 } \ |
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1940 } |
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1941 |
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1942 #define InstanceKlass_SPECIALIZED_BOUNDED_OOP_ITERATE( \ |
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1943 T, start_p, count, low, high, \ |
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1944 do_oop, assert_fn) \ |
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1945 { \ |
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1946 T* const l = (T*)(low); \ |
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1947 T* const h = (T*)(high); \ |
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1948 assert(mask_bits((intptr_t)l, sizeof(T)-1) == 0 && \ |
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1949 mask_bits((intptr_t)h, sizeof(T)-1) == 0, \ |
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1950 "bounded region must be properly aligned"); \ |
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1951 T* p = (T*)(start_p); \ |
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1952 T* end = p + (count); \ |
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1953 if (p < l) p = l; \ |
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1954 if (end > h) end = h; \ |
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1955 while (p < end) { \ |
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1956 (assert_fn)(p); \ |
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1957 do_oop; \ |
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1958 ++p; \ |
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1959 } \ |
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1960 } |
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1961 |
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1962 |
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1963 // The following macros call specialized macros, passing either oop or |
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1964 // narrowOop as the specialization type. These test the UseCompressedOops |
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1965 // flag. |
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1966 #define InstanceKlass_OOP_MAP_ITERATE(obj, do_oop, assert_fn) \ |
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1967 { \ |
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1968 /* Compute oopmap block range. The common case \ |
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1969 is nonstatic_oop_map_size == 1. */ \ |
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1970 OopMapBlock* map = start_of_nonstatic_oop_maps(); \ |
938 | 1971 OopMapBlock* const end_map = map + nonstatic_oop_map_count(); \ |
113
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1972 if (UseCompressedOops) { \ |
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1973 while (map < end_map) { \ |
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1974 InstanceKlass_SPECIALIZED_OOP_ITERATE(narrowOop, \ |
938 | 1975 obj->obj_field_addr<narrowOop>(map->offset()), map->count(), \ |
113
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1976 do_oop, assert_fn) \ |
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1977 ++map; \ |
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1978 } \ |
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1979 } else { \ |
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1980 while (map < end_map) { \ |
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1981 InstanceKlass_SPECIALIZED_OOP_ITERATE(oop, \ |
938 | 1982 obj->obj_field_addr<oop>(map->offset()), map->count(), \ |
113
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1983 do_oop, assert_fn) \ |
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1984 ++map; \ |
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1985 } \ |
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1986 } \ |
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1987 } |
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1988 |
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1989 #define InstanceKlass_OOP_MAP_REVERSE_ITERATE(obj, do_oop, assert_fn) \ |
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1990 { \ |
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1991 OopMapBlock* const start_map = start_of_nonstatic_oop_maps(); \ |
938 | 1992 OopMapBlock* map = start_map + nonstatic_oop_map_count(); \ |
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1993 if (UseCompressedOops) { \ |
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1994 while (start_map < map) { \ |
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1995 --map; \ |
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1996 InstanceKlass_SPECIALIZED_OOP_REVERSE_ITERATE(narrowOop, \ |
938 | 1997 obj->obj_field_addr<narrowOop>(map->offset()), map->count(), \ |
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1998 do_oop, assert_fn) \ |
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1999 } \ |
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2000 } else { \ |
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2001 while (start_map < map) { \ |
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2002 --map; \ |
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2003 InstanceKlass_SPECIALIZED_OOP_REVERSE_ITERATE(oop, \ |
938 | 2004 obj->obj_field_addr<oop>(map->offset()), map->count(), \ |
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2005 do_oop, assert_fn) \ |
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2006 } \ |
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2007 } \ |
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2008 } |
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2009 |
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2010 #define InstanceKlass_BOUNDED_OOP_MAP_ITERATE(obj, low, high, do_oop, \ |
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2011 assert_fn) \ |
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2012 { \ |
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2013 /* Compute oopmap block range. The common case is \ |
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2014 nonstatic_oop_map_size == 1, so we accept the \ |
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2015 usually non-existent extra overhead of examining \ |
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2016 all the maps. */ \ |
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2017 OopMapBlock* map = start_of_nonstatic_oop_maps(); \ |
938 | 2018 OopMapBlock* const end_map = map + nonstatic_oop_map_count(); \ |
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2019 if (UseCompressedOops) { \ |
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2020 while (map < end_map) { \ |
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2021 InstanceKlass_SPECIALIZED_BOUNDED_OOP_ITERATE(narrowOop, \ |
938 | 2022 obj->obj_field_addr<narrowOop>(map->offset()), map->count(), \ |
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2023 low, high, \ |
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2024 do_oop, assert_fn) \ |
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2025 ++map; \ |
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2026 } \ |
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2027 } else { \ |
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2028 while (map < end_map) { \ |
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2029 InstanceKlass_SPECIALIZED_BOUNDED_OOP_ITERATE(oop, \ |
938 | 2030 obj->obj_field_addr<oop>(map->offset()), map->count(), \ |
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2031 low, high, \ |
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2032 do_oop, assert_fn) \ |
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2033 ++map; \ |
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2034 } \ |
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2035 } \ |
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2036 } |
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2037 |
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2038 void InstanceKlass::oop_follow_contents(oop obj) { |
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2039 assert(obj != NULL, "can't follow the content of NULL object"); |
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2040 MarkSweep::follow_klass(obj->klass()); |
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2041 InstanceKlass_OOP_MAP_ITERATE( \ |
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2042 obj, \ |
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2043 MarkSweep::mark_and_push(p), \ |
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2044 assert_is_in_closed_subset) |
0 | 2045 } |
2046 | |
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2047 #if INCLUDE_ALL_GCS |
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2048 void InstanceKlass::oop_follow_contents(ParCompactionManager* cm, |
0 | 2049 oop obj) { |
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2050 assert(obj != NULL, "can't follow the content of NULL object"); |
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2051 PSParallelCompact::follow_klass(cm, obj->klass()); |
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2052 // Only mark the header and let the scan of the meta-data mark |
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2053 // everything else. |
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2054 InstanceKlass_OOP_MAP_ITERATE( \ |
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2055 obj, \ |
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2056 PSParallelCompact::mark_and_push(cm, p), \ |
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2057 assert_is_in) |
0 | 2058 } |
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2059 #endif // INCLUDE_ALL_GCS |
0 | 2060 |
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2061 // closure's do_metadata() method dictates whether the given closure should be |
0 | 2062 // applied to the klass ptr in the object header. |
2063 | |
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2064 #define if_do_metadata_checked(closure, nv_suffix) \ |
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2065 /* Make sure the non-virtual and the virtual versions match. */ \ |
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2066 assert(closure->do_metadata##nv_suffix() == closure->do_metadata(), \ |
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2067 "Inconsistency in do_metadata"); \ |
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2068 if (closure->do_metadata##nv_suffix()) |
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2069 |
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2070 #define InstanceKlass_OOP_OOP_ITERATE_DEFN(OopClosureType, nv_suffix) \ |
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2071 \ |
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2072 int InstanceKlass::oop_oop_iterate##nv_suffix(oop obj, 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 InstanceKlass_OOP_MAP_ITERATE( \ |
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2079 obj, \ |
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2080 SpecializationStats:: \ |
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2081 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(); \ |
0 | 2085 } |
2086 | |
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2087 #if INCLUDE_ALL_GCS |
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2088 #define InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DEFN(OopClosureType, nv_suffix) \ |
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2089 \ |
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2090 int InstanceKlass::oop_oop_iterate_backwards##nv_suffix(oop obj, \ |
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2091 OopClosureType* closure) { \ |
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2092 SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::ik); \ |
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2093 /* header */ \ |
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2094 if_do_metadata_checked(closure, nv_suffix) { \ |
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2095 closure->do_klass##nv_suffix(obj->klass()); \ |
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2096 } \ |
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2097 /* instance variables */ \ |
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2098 InstanceKlass_OOP_MAP_REVERSE_ITERATE( \ |
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2099 obj, \ |
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2100 SpecializationStats::record_do_oop_call##nv_suffix(SpecializationStats::ik);\ |
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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(); \ |
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2104 } |
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2105 #endif // INCLUDE_ALL_GCS |
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2106 |
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2107 #define InstanceKlass_OOP_OOP_ITERATE_DEFN_m(OopClosureType, nv_suffix) \ |
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2108 \ |
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2109 int InstanceKlass::oop_oop_iterate##nv_suffix##_m(oop obj, \ |
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2110 OopClosureType* closure, \ |
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2111 MemRegion mr) { \ |
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2112 SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::ik);\ |
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2113 if_do_metadata_checked(closure, nv_suffix) { \ |
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2114 if (mr.contains(obj)) { \ |
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2115 closure->do_klass##nv_suffix(obj->klass()); \ |
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2116 } \ |
113
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2117 } \ |
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2118 InstanceKlass_BOUNDED_OOP_MAP_ITERATE( \ |
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2119 obj, mr.start(), mr.end(), \ |
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2120 (closure)->do_oop##nv_suffix(p), \ |
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2121 assert_is_in_closed_subset) \ |
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2122 return size_helper(); \ |
0 | 2123 } |
2124 | |
2125 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_DEFN) | |
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2126 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_DEFN) |
0 | 2127 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_DEFN_m) |
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2128 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_DEFN_m) |
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2129 #if INCLUDE_ALL_GCS |
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2130 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DEFN) |
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2131 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DEFN) |
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2132 #endif // INCLUDE_ALL_GCS |
0 | 2133 |
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2134 int InstanceKlass::oop_adjust_pointers(oop obj) { |
0 | 2135 int size = size_helper(); |
113
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2136 InstanceKlass_OOP_MAP_ITERATE( \ |
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2137 obj, \ |
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2138 MarkSweep::adjust_pointer(p), \ |
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2139 assert_is_in) |
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2140 MarkSweep::adjust_klass(obj->klass()); |
0 | 2141 return size; |
2142 } | |
2143 | |
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2144 #if INCLUDE_ALL_GCS |
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2145 void InstanceKlass::oop_push_contents(PSPromotionManager* pm, oop obj) { |
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2146 InstanceKlass_OOP_MAP_REVERSE_ITERATE( \ |
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2147 obj, \ |
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2148 if (PSScavenge::should_scavenge(p)) { \ |
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2149 pm->claim_or_forward_depth(p); \ |
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2150 }, \ |
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2151 assert_nothing ) |
0 | 2152 } |
2153 | |
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2154 int InstanceKlass::oop_update_pointers(ParCompactionManager* cm, oop obj) { |
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2155 int size = size_helper(); |
113
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2156 InstanceKlass_OOP_MAP_ITERATE( \ |
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2157 obj, \ |
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2158 PSParallelCompact::adjust_pointer(p), \ |
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2159 assert_is_in) |
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2160 obj->update_header(cm); |
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2161 return size; |
0 | 2162 } |
2163 | |
8001
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2164 #endif // INCLUDE_ALL_GCS |
0 | 2165 |
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2166 void InstanceKlass::clean_implementors_list(BoolObjectClosure* is_alive) { |
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2167 assert(is_loader_alive(is_alive), "this klass should be live"); |
5998
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2168 if (is_interface()) { |
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2169 if (ClassUnloading) { |
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2170 Klass* impl = implementor(); |
5998
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2171 if (impl != NULL) { |
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2172 if (!impl->is_loader_alive(is_alive)) { |
5998
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2173 // remove this guy |
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2174 *adr_implementor() = NULL; |
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2175 } |
0 | 2176 } |
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2177 } |
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2178 } |
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2179 } |
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2180 |
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2181 void InstanceKlass::clean_method_data(BoolObjectClosure* is_alive) { |
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2182 #ifdef COMPILER2 |
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2183 // Currently only used by C2. |
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2184 for (int m = 0; m < methods()->length(); m++) { |
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2185 MethodData* mdo = methods()->at(m)->method_data(); |
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2186 if (mdo != NULL) { |
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2187 for (ProfileData* data = mdo->first_data(); |
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2188 mdo->is_valid(data); |
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2189 data = mdo->next_data(data)) { |
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2190 data->clean_weak_klass_links(is_alive); |
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2191 } |
0 | 2192 } |
2193 } | |
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2194 #else |
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2195 #ifdef ASSERT |
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2196 // Verify that we haven't started to use MDOs for C1. |
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2197 for (int m = 0; m < methods()->length(); m++) { |
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2198 MethodData* mdo = methods()->at(m)->method_data(); |
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2199 assert(mdo == NULL, "Didn't expect C1 to use MDOs"); |
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2200 } |
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2201 #endif // ASSERT |
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2202 #endif // !COMPILER2 |
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2203 } |
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2204 |
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2205 |
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2206 static void remove_unshareable_in_class(Klass* k) { |
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2207 // remove klass's unshareable info |
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2208 k->remove_unshareable_info(); |
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2209 } |
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2210 |
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2211 void InstanceKlass::remove_unshareable_info() { |
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2212 Klass::remove_unshareable_info(); |
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2213 // Unlink the class |
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2214 if (is_linked()) { |
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2215 unlink_class(); |
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2216 } |
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2217 init_implementor(); |
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2218 |
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2219 constants()->remove_unshareable_info(); |
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2220 |
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2221 for (int i = 0; i < methods()->length(); i++) { |
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2222 Method* m = methods()->at(i); |
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2223 m->remove_unshareable_info(); |
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2224 } |
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2225 |
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2226 // Need to reinstate when reading back the class. |
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2227 set_init_lock(NULL); |
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2228 |
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2229 // do array classes also. |
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2230 array_klasses_do(remove_unshareable_in_class); |
0 | 2231 } |
2232 | |
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2233 void restore_unshareable_in_class(Klass* k, TRAPS) { |
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2234 k->restore_unshareable_info(CHECK); |
0 | 2235 } |
2236 | |
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2237 void InstanceKlass::restore_unshareable_info(TRAPS) { |
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2238 Klass::restore_unshareable_info(CHECK); |
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2239 instanceKlassHandle ik(THREAD, this); |
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2240 |
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2241 Array<Method*>* methods = ik->methods(); |
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2242 int num_methods = methods->length(); |
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2243 for (int index2 = 0; index2 < num_methods; ++index2) { |
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2244 methodHandle m(THREAD, methods->at(index2)); |
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2245 m()->link_method(m, CHECK); |
6733
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2246 // restore method's vtable by calling a virtual function |
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2247 m->restore_vtable(); |
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2248 } |
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2249 if (JvmtiExport::has_redefined_a_class()) { |
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2250 // Reinitialize vtable because RedefineClasses may have changed some |
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2251 // entries in this vtable for super classes so the CDS vtable might |
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2252 // point to old or obsolete entries. RedefineClasses doesn't fix up |
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2253 // vtables in the shared system dictionary, only the main one. |
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2254 // It also redefines the itable too so fix that too. |
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2255 ResourceMark rm(THREAD); |
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2256 ik->vtable()->initialize_vtable(false, CHECK); |
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2257 ik->itable()->initialize_itable(false, CHECK); |
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2258 } |
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2259 |
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2260 // Allocate a simple java object for a lock. |
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2261 // This needs to be a java object because during class initialization |
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2262 // it can be held across a java call. |
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2263 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK); |
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2264 Handle h(THREAD, (oop)r); |
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2265 ik->set_init_lock(h()); |
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2266 |
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2267 // restore constant pool resolved references |
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2268 ik->constants()->restore_unshareable_info(CHECK); |
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2269 |
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2270 ik->array_klasses_do(restore_unshareable_in_class, CHECK); |
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2271 } |
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2272 |
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2273 static void clear_all_breakpoints(Method* m) { |
0 | 2274 m->clear_all_breakpoints(); |
2275 } | |
2276 | |
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2277 void InstanceKlass::release_C_heap_structures() { |
0 | 2278 // Deallocate oop map cache |
2279 if (_oop_map_cache != NULL) { | |
2280 delete _oop_map_cache; | |
2281 _oop_map_cache = NULL; | |
2282 } | |
2283 | |
2284 // Deallocate JNI identifiers for jfieldIDs | |
2285 JNIid::deallocate(jni_ids()); | |
2286 set_jni_ids(NULL); | |
2287 | |
2288 jmethodID* jmeths = methods_jmethod_ids_acquire(); | |
2289 if (jmeths != (jmethodID*)NULL) { | |
2290 release_set_methods_jmethod_ids(NULL); | |
2291 FreeHeap(jmeths); | |
2292 } | |
2293 | |
2294 int* indices = methods_cached_itable_indices_acquire(); | |
2295 if (indices != (int*)NULL) { | |
2296 release_set_methods_cached_itable_indices(NULL); | |
2297 FreeHeap(indices); | |
2298 } | |
2299 | |
2300 // release dependencies | |
2301 nmethodBucket* b = _dependencies; | |
2302 _dependencies = NULL; | |
2303 while (b != NULL) { | |
2304 nmethodBucket* next = b->next(); | |
2305 delete b; | |
2306 b = next; | |
2307 } | |
2308 | |
2309 // Deallocate breakpoint records | |
2310 if (breakpoints() != 0x0) { | |
2311 methods_do(clear_all_breakpoints); | |
2312 assert(breakpoints() == 0x0, "should have cleared breakpoints"); | |
2313 } | |
2314 | |
2315 // deallocate information about previous versions | |
2316 if (_previous_versions != NULL) { | |
2317 for (int i = _previous_versions->length() - 1; i >= 0; i--) { | |
2318 PreviousVersionNode * pv_node = _previous_versions->at(i); | |
2319 delete pv_node; | |
2320 } | |
2321 delete _previous_versions; | |
2322 _previous_versions = NULL; | |
2323 } | |
2324 | |
2325 // deallocate the cached class file | |
2326 if (_cached_class_file_bytes != NULL) { | |
6197 | 2327 os::free(_cached_class_file_bytes, mtClass); |
0 | 2328 _cached_class_file_bytes = NULL; |
2329 _cached_class_file_len = 0; | |
2330 } | |
2177
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2331 |
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2332 // Decrement symbol reference counts associated with the unloaded class. |
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2333 if (_name != NULL) _name->decrement_refcount(); |
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2334 // unreference array name derived from this class name (arrays of an unloaded |
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diff
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|
2335 // class can't be referenced anymore). |
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2336 if (_array_name != NULL) _array_name->decrement_refcount(); |
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|
2337 if (_source_file_name != NULL) _source_file_name->decrement_refcount(); |
6203
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6294277: java -Xdebug crashes on SourceDebugExtension attribute larger than 64K
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diff
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|
2338 if (_source_debug_extension != NULL) FREE_C_HEAP_ARRAY(char, _source_debug_extension, mtClass); |
7464
ecd24264898b
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|
2339 |
ecd24264898b
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diff
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|
2340 assert(_total_instanceKlass_count >= 1, "Sanity check"); |
ecd24264898b
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2341 Atomic::dec(&_total_instanceKlass_count); |
2177
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2342 } |
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|
2343 |
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2344 void InstanceKlass::set_source_file_name(Symbol* n) { |
2177
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2345 _source_file_name = n; |
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2346 if (_source_file_name != NULL) _source_file_name->increment_refcount(); |
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|
2347 } |
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|
2348 |
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2349 void InstanceKlass::set_source_debug_extension(char* array, int length) { |
6203
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2350 if (array == NULL) { |
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|
2351 _source_debug_extension = NULL; |
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|
2352 } else { |
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|
2353 // Adding one to the attribute length in order to store a null terminator |
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2354 // character could cause an overflow because the attribute length is |
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2355 // already coded with an u4 in the classfile, but in practice, it's |
04ade88d9712
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|
2356 // unlikely to happen. |
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|
2357 assert((length+1) > length, "Overflow checking"); |
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|
2358 char* sde = NEW_C_HEAP_ARRAY(char, (length + 1), mtClass); |
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|
2359 for (int i = 0; i < length; i++) { |
04ade88d9712
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|
2360 sde[i] = array[i]; |
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|
2361 } |
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|
2362 sde[length] = '\0'; |
04ade88d9712
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diff
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|
2363 _source_debug_extension = sde; |
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|
2364 } |
0 | 2365 } |
2366 | |
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|
2367 address InstanceKlass::static_field_addr(int offset) { |
6735
aed758eda82a
7195833: NPG: Rename instanceClassLoaderKlass, instanceRefKlass and instanceMirrorKlass
coleenp
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6733
diff
changeset
|
2368 return (address)(offset + InstanceMirrorKlass::offset_of_static_fields() + (intptr_t)java_mirror()); |
2376
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
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2357
diff
changeset
|
2369 } |
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
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2357
diff
changeset
|
2370 |
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
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diff
changeset
|
2371 |
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|
2372 const char* InstanceKlass::signature_name() const { |
0 | 2373 const char* src = (const char*) (name()->as_C_string()); |
2374 const int src_length = (int)strlen(src); | |
2375 char* dest = NEW_RESOURCE_ARRAY(char, src_length + 3); | |
2376 int src_index = 0; | |
2377 int dest_index = 0; | |
2378 dest[dest_index++] = 'L'; | |
2379 while (src_index < src_length) { | |
2380 dest[dest_index++] = src[src_index++]; | |
2381 } | |
2382 dest[dest_index++] = ';'; | |
2383 dest[dest_index] = '\0'; | |
2384 return dest; | |
2385 } | |
2386 | |
2387 // different verisons of is_same_class_package | |
6725
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|
2388 bool InstanceKlass::is_same_class_package(Klass* class2) { |
da91efe96a93
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diff
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|
2389 Klass* class1 = this; |
da91efe96a93
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diff
changeset
|
2390 oop classloader1 = InstanceKlass::cast(class1)->class_loader(); |
6983 | 2391 Symbol* classname1 = class1->name(); |
2392 | |
2393 if (class2->oop_is_objArray()) { | |
6831
d8ce2825b193
8000213: NPG: Should have renamed arrayKlass and typeArrayKlass
coleenp
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6735
diff
changeset
|
2394 class2 = ObjArrayKlass::cast(class2)->bottom_klass(); |
0 | 2395 } |
2396 oop classloader2; | |
6983 | 2397 if (class2->oop_is_instance()) { |
6725
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|
2398 classloader2 = InstanceKlass::cast(class2)->class_loader(); |
0 | 2399 } else { |
6983 | 2400 assert(class2->oop_is_typeArray(), "should be type array"); |
0 | 2401 classloader2 = NULL; |
2402 } | |
6983 | 2403 Symbol* classname2 = class2->name(); |
0 | 2404 |
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|
2405 return InstanceKlass::is_same_class_package(classloader1, classname1, |
0 | 2406 classloader2, classname2); |
2407 } | |
2408 | |
6725
da91efe96a93
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|
2409 bool InstanceKlass::is_same_class_package(oop classloader2, Symbol* classname2) { |
da91efe96a93
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diff
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|
2410 Klass* class1 = this; |
da91efe96a93
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|
2411 oop classloader1 = InstanceKlass::cast(class1)->class_loader(); |
6983 | 2412 Symbol* classname1 = class1->name(); |
0 | 2413 |
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|
2414 return InstanceKlass::is_same_class_package(classloader1, classname1, |
0 | 2415 classloader2, classname2); |
2416 } | |
2417 | |
2418 // return true if two classes are in the same package, classloader | |
2419 // and classname information is enough to determine a class's package | |
6725
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|
2420 bool InstanceKlass::is_same_class_package(oop class_loader1, Symbol* class_name1, |
2177
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6990754: Use native memory and reference counting to implement SymbolTable
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|
2421 oop class_loader2, Symbol* class_name2) { |
0 | 2422 if (class_loader1 != class_loader2) { |
2423 return false; | |
665
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6814659: separable cleanups and subroutines for 6655638
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|
2424 } else if (class_name1 == class_name2) { |
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6814659: separable cleanups and subroutines for 6655638
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|
2425 return true; // skip painful bytewise comparison |
0 | 2426 } else { |
2427 ResourceMark rm; | |
2428 | |
2177
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6990754: Use native memory and reference counting to implement SymbolTable
coleenp
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diff
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|
2429 // The Symbol*'s are in UTF8 encoding. Since we only need to check explicitly |
0 | 2430 // for ASCII characters ('/', 'L', '['), we can keep them in UTF8 encoding. |
2431 // Otherwise, we just compare jbyte values between the strings. | |
2177
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diff
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|
2432 const jbyte *name1 = class_name1->base(); |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
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diff
changeset
|
2433 const jbyte *name2 = class_name2->base(); |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
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diff
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|
2434 |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
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diff
changeset
|
2435 const jbyte *last_slash1 = UTF8::strrchr(name1, class_name1->utf8_length(), '/'); |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
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diff
changeset
|
2436 const jbyte *last_slash2 = UTF8::strrchr(name2, class_name2->utf8_length(), '/'); |
0 | 2437 |
2438 if ((last_slash1 == NULL) || (last_slash2 == NULL)) { | |
2439 // One of the two doesn't have a package. Only return true | |
2440 // if the other one also doesn't have a package. | |
2441 return last_slash1 == last_slash2; | |
2442 } else { | |
2443 // Skip over '['s | |
2444 if (*name1 == '[') { | |
2445 do { | |
2446 name1++; | |
2447 } while (*name1 == '['); | |
2448 if (*name1 != 'L') { | |
2449 // Something is terribly wrong. Shouldn't be here. | |
2450 return false; | |
2451 } | |
2452 } | |
2453 if (*name2 == '[') { | |
2454 do { | |
2455 name2++; | |
2456 } while (*name2 == '['); | |
2457 if (*name2 != 'L') { | |
2458 // Something is terribly wrong. Shouldn't be here. | |
2459 return false; | |
2460 } | |
2461 } | |
2462 | |
2463 // Check that package part is identical | |
2464 int length1 = last_slash1 - name1; | |
2465 int length2 = last_slash2 - name2; | |
2466 | |
2467 return UTF8::equal(name1, length1, name2, length2); | |
2468 } | |
2469 } | |
2470 } | |
2471 | |
652
4aaa9f5e02a8
4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
acorn
parents:
605
diff
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|
2472 // Returns true iff super_method can be overridden by a method in targetclassname |
4aaa9f5e02a8
4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
acorn
parents:
605
diff
changeset
|
2473 // See JSL 3rd edition 8.4.6.1 |
4aaa9f5e02a8
4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
acorn
parents:
605
diff
changeset
|
2474 // Assumes name-signature match |
6725
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|
2475 // "this" is InstanceKlass of super_method which must exist |
da91efe96a93
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coleenp
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diff
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|
2476 // note that the InstanceKlass of the method in the targetclassname has not always been created yet |
da91efe96a93
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coleenp
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|
2477 bool InstanceKlass::is_override(methodHandle super_method, Handle targetclassloader, Symbol* targetclassname, TRAPS) { |
652
4aaa9f5e02a8
4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
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605
diff
changeset
|
2478 // Private methods can not be overridden |
4aaa9f5e02a8
4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
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parents:
605
diff
changeset
|
2479 if (super_method->is_private()) { |
4aaa9f5e02a8
4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
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diff
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|
2480 return false; |
4aaa9f5e02a8
4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
acorn
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diff
changeset
|
2481 } |
4aaa9f5e02a8
4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
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diff
changeset
|
2482 // If super method is accessible, then override |
4aaa9f5e02a8
4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
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605
diff
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|
2483 if ((super_method->is_protected()) || |
4aaa9f5e02a8
4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
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605
diff
changeset
|
2484 (super_method->is_public())) { |
4aaa9f5e02a8
4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
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605
diff
changeset
|
2485 return true; |
4aaa9f5e02a8
4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
acorn
parents:
605
diff
changeset
|
2486 } |
4aaa9f5e02a8
4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
acorn
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diff
changeset
|
2487 // Package-private methods are not inherited outside of package |
4aaa9f5e02a8
4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
acorn
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605
diff
changeset
|
2488 assert(super_method->is_package_private(), "must be package private"); |
2177
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diff
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|
2489 return(is_same_class_package(targetclassloader(), targetclassname)); |
652
4aaa9f5e02a8
4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
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diff
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|
2490 } |
0 | 2491 |
665
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6814659: separable cleanups and subroutines for 6655638
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|
2492 /* defined for now in jvm.cpp, for historical reasons *-- |
6725
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|
2493 Klass* InstanceKlass::compute_enclosing_class_impl(instanceKlassHandle self, |
2177
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6990754: Use native memory and reference counting to implement SymbolTable
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diff
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|
2494 Symbol*& simple_name_result, TRAPS) { |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
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diff
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|
2495 ... |
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6814659: separable cleanups and subroutines for 6655638
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|
2496 } |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
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diff
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|
2497 */ |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
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|
2498 |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
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605
diff
changeset
|
2499 // tell if two classes have the same enclosing class (at package level) |
6725
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|
2500 bool InstanceKlass::is_same_package_member_impl(instanceKlassHandle class1, |
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|
2501 Klass* class2_oop, TRAPS) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
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|
2502 if (class2_oop == class1()) return true; |
6983 | 2503 if (!class2_oop->oop_is_instance()) return false; |
665
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6814659: separable cleanups and subroutines for 6655638
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diff
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|
2504 instanceKlassHandle class2(THREAD, class2_oop); |
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6814659: separable cleanups and subroutines for 6655638
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|
2505 |
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diff
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|
2506 // must be in same package before we try anything else |
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diff
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|
2507 if (!class1->is_same_class_package(class2->class_loader(), class2->name())) |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
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diff
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|
2508 return false; |
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6814659: separable cleanups and subroutines for 6655638
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|
2509 |
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2510 // As long as there is an outer1.getEnclosingClass, |
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2511 // shift the search outward. |
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2512 instanceKlassHandle outer1 = class1; |
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2513 for (;;) { |
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2514 // As we walk along, look for equalities between outer1 and class2. |
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2515 // Eventually, the walks will terminate as outer1 stops |
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2516 // at the top-level class around the original class. |
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2517 bool ignore_inner_is_member; |
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2518 Klass* next = outer1->compute_enclosing_class(&ignore_inner_is_member, |
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2519 CHECK_false); |
665
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2520 if (next == NULL) break; |
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2521 if (next == class2()) return true; |
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2522 outer1 = instanceKlassHandle(THREAD, next); |
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2523 } |
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2524 |
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2525 // Now do the same for class2. |
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2526 instanceKlassHandle outer2 = class2; |
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2527 for (;;) { |
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2528 bool ignore_inner_is_member; |
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2529 Klass* next = outer2->compute_enclosing_class(&ignore_inner_is_member, |
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2530 CHECK_false); |
665
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2531 if (next == NULL) break; |
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2532 // Might as well check the new outer against all available values. |
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2533 if (next == class1()) return true; |
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2534 if (next == outer1()) return true; |
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2535 outer2 = instanceKlassHandle(THREAD, next); |
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2536 } |
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2537 |
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2538 // If by this point we have not found an equality between the |
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2539 // two classes, we know they are in separate package members. |
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2540 return false; |
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2541 } |
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2542 |
0 | 2543 |
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2544 jint InstanceKlass::compute_modifier_flags(TRAPS) const { |
0 | 2545 jint access = access_flags().as_int(); |
2546 | |
2547 // But check if it happens to be member class. | |
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2548 instanceKlassHandle ik(THREAD, this); |
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2549 InnerClassesIterator iter(ik); |
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2550 for (; !iter.done(); iter.next()) { |
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2551 int ioff = iter.inner_class_info_index(); |
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2552 // Inner class attribute can be zero, skip it. |
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2553 // Strange but true: JVM spec. allows null inner class refs. |
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2554 if (ioff == 0) continue; |
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2555 |
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2556 // only look at classes that are already loaded |
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2557 // since we are looking for the flags for our self. |
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2558 Symbol* inner_name = ik->constants()->klass_name_at(ioff); |
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2559 if ((ik->name() == inner_name)) { |
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2560 // This is really a member class. |
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2561 access = iter.inner_access_flags(); |
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2562 break; |
0 | 2563 } |
2564 } | |
2565 // Remember to strip ACC_SUPER bit | |
2566 return (access & (~JVM_ACC_SUPER)) & JVM_ACC_WRITTEN_FLAGS; | |
2567 } | |
2568 | |
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2569 jint InstanceKlass::jvmti_class_status() const { |
0 | 2570 jint result = 0; |
2571 | |
2572 if (is_linked()) { | |
2573 result |= JVMTI_CLASS_STATUS_VERIFIED | JVMTI_CLASS_STATUS_PREPARED; | |
2574 } | |
2575 | |
2576 if (is_initialized()) { | |
2577 assert(is_linked(), "Class status is not consistent"); | |
2578 result |= JVMTI_CLASS_STATUS_INITIALIZED; | |
2579 } | |
2580 if (is_in_error_state()) { | |
2581 result |= JVMTI_CLASS_STATUS_ERROR; | |
2582 } | |
2583 return result; | |
2584 } | |
2585 | |
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2586 Method* InstanceKlass::method_at_itable(Klass* holder, int index, TRAPS) { |
0 | 2587 itableOffsetEntry* ioe = (itableOffsetEntry*)start_of_itable(); |
2588 int method_table_offset_in_words = ioe->offset()/wordSize; | |
2589 int nof_interfaces = (method_table_offset_in_words - itable_offset_in_words()) | |
2590 / itableOffsetEntry::size(); | |
2591 | |
2592 for (int cnt = 0 ; ; cnt ++, ioe ++) { | |
605 | 2593 // If the interface isn't implemented by the receiver class, |
0 | 2594 // the VM should throw IncompatibleClassChangeError. |
2595 if (cnt >= nof_interfaces) { | |
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2596 THROW_NULL(vmSymbols::java_lang_IncompatibleClassChangeError()); |
0 | 2597 } |
2598 | |
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2599 Klass* ik = ioe->interface_klass(); |
0 | 2600 if (ik == holder) break; |
2601 } | |
2602 | |
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2603 itableMethodEntry* ime = ioe->first_method_entry(this); |
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2604 Method* m = ime[index].method(); |
0 | 2605 if (m == NULL) { |
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2606 THROW_NULL(vmSymbols::java_lang_AbstractMethodError()); |
0 | 2607 } |
2608 return m; | |
2609 } | |
2610 | |
2611 // On-stack replacement stuff | |
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2612 void InstanceKlass::add_osr_nmethod(nmethod* n) { |
0 | 2613 // only one compilation can be active |
2614 NEEDS_CLEANUP | |
2615 // This is a short non-blocking critical region, so the no safepoint check is ok. | |
2616 OsrList_lock->lock_without_safepoint_check(); | |
2617 assert(n->is_osr_method(), "wrong kind of nmethod"); | |
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2618 n->set_osr_link(osr_nmethods_head()); |
0 | 2619 set_osr_nmethods_head(n); |
1783 | 2620 // Raise the highest osr level if necessary |
2621 if (TieredCompilation) { | |
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2622 Method* m = n->method(); |
1783 | 2623 m->set_highest_osr_comp_level(MAX2(m->highest_osr_comp_level(), n->comp_level())); |
2624 } | |
0 | 2625 // Remember to unlock again |
2626 OsrList_lock->unlock(); | |
1783 | 2627 |
2628 // Get rid of the osr methods for the same bci that have lower levels. | |
2629 if (TieredCompilation) { | |
2630 for (int l = CompLevel_limited_profile; l < n->comp_level(); l++) { | |
2631 nmethod *inv = lookup_osr_nmethod(n->method(), n->osr_entry_bci(), l, true); | |
2632 if (inv != NULL && inv->is_in_use()) { | |
2633 inv->make_not_entrant(); | |
2634 } | |
2635 } | |
2636 } | |
0 | 2637 } |
2638 | |
2639 | |
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2640 void InstanceKlass::remove_osr_nmethod(nmethod* n) { |
0 | 2641 // This is a short non-blocking critical region, so the no safepoint check is ok. |
2642 OsrList_lock->lock_without_safepoint_check(); | |
2643 assert(n->is_osr_method(), "wrong kind of nmethod"); | |
2644 nmethod* last = NULL; | |
2645 nmethod* cur = osr_nmethods_head(); | |
1783 | 2646 int max_level = CompLevel_none; // Find the max comp level excluding n |
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2647 Method* m = n->method(); |
0 | 2648 // Search for match |
2649 while(cur != NULL && cur != n) { | |
1783 | 2650 if (TieredCompilation) { |
2651 // Find max level before n | |
2652 max_level = MAX2(max_level, cur->comp_level()); | |
2653 } | |
0 | 2654 last = cur; |
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2655 cur = cur->osr_link(); |
0 | 2656 } |
1783 | 2657 nmethod* next = NULL; |
0 | 2658 if (cur == n) { |
1783 | 2659 next = cur->osr_link(); |
0 | 2660 if (last == NULL) { |
2661 // Remove first element | |
1783 | 2662 set_osr_nmethods_head(next); |
0 | 2663 } else { |
1783 | 2664 last->set_osr_link(next); |
0 | 2665 } |
2666 } | |
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2667 n->set_osr_link(NULL); |
1783 | 2668 if (TieredCompilation) { |
2669 cur = next; | |
2670 while (cur != NULL) { | |
2671 // Find max level after n | |
2672 max_level = MAX2(max_level, cur->comp_level()); | |
2673 cur = cur->osr_link(); | |
2674 } | |
2675 m->set_highest_osr_comp_level(max_level); | |
2676 } | |
0 | 2677 // Remember to unlock again |
2678 OsrList_lock->unlock(); | |
2679 } | |
2680 | |
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2681 nmethod* InstanceKlass::lookup_osr_nmethod(Method* const m, int bci, int comp_level, bool match_level) const { |
0 | 2682 // This is a short non-blocking critical region, so the no safepoint check is ok. |
2683 OsrList_lock->lock_without_safepoint_check(); | |
2684 nmethod* osr = osr_nmethods_head(); | |
1783 | 2685 nmethod* best = NULL; |
0 | 2686 while (osr != NULL) { |
2687 assert(osr->is_osr_method(), "wrong kind of nmethod found in chain"); | |
1783 | 2688 // There can be a time when a c1 osr method exists but we are waiting |
2689 // for a c2 version. When c2 completes its osr nmethod we will trash | |
2690 // the c1 version and only be able to find the c2 version. However | |
2691 // while we overflow in the c1 code at back branches we don't want to | |
2692 // try and switch to the same code as we are already running | |
2693 | |
0 | 2694 if (osr->method() == m && |
2695 (bci == InvocationEntryBci || osr->osr_entry_bci() == bci)) { | |
1783 | 2696 if (match_level) { |
2697 if (osr->comp_level() == comp_level) { | |
2698 // Found a match - return it. | |
2699 OsrList_lock->unlock(); | |
2700 return osr; | |
2701 } | |
2702 } else { | |
2703 if (best == NULL || (osr->comp_level() > best->comp_level())) { | |
2704 if (osr->comp_level() == CompLevel_highest_tier) { | |
2705 // Found the best possible - return it. | |
2706 OsrList_lock->unlock(); | |
2707 return osr; | |
2708 } | |
2709 best = osr; | |
2710 } | |
2711 } | |
0 | 2712 } |
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2713 osr = osr->osr_link(); |
0 | 2714 } |
2715 OsrList_lock->unlock(); | |
1783 | 2716 if (best != NULL && best->comp_level() >= comp_level && match_level == false) { |
2717 return best; | |
2718 } | |
0 | 2719 return NULL; |
2720 } | |
2721 | |
2722 // ----------------------------------------------------------------------------------------------------- | |
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2723 // Printing |
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2724 |
0 | 2725 #ifndef PRODUCT |
2726 | |
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2727 #define BULLET " - " |
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2728 |
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2729 static const char* state_names[] = { |
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2730 "allocated", "loaded", "linked", "being_initialized", "fully_initialized", "initialization_error" |
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2731 }; |
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2732 |
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2733 void InstanceKlass::print_on(outputStream* st) const { |
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2734 assert(is_klass(), "must be klass"); |
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2735 Klass::print_on(st); |
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2736 |
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2737 st->print(BULLET"instance size: %d", size_helper()); st->cr(); |
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2738 st->print(BULLET"klass size: %d", size()); st->cr(); |
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2739 st->print(BULLET"access: "); access_flags().print_on(st); st->cr(); |
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2740 st->print(BULLET"state: "); st->print_cr(state_names[_init_state]); |
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2741 st->print(BULLET"name: "); name()->print_value_on(st); st->cr(); |
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2742 st->print(BULLET"super: "); super()->print_value_on_maybe_null(st); st->cr(); |
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2743 st->print(BULLET"sub: "); |
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2744 Klass* sub = subklass(); |
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2745 int n; |
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2746 for (n = 0; sub != NULL; n++, sub = sub->next_sibling()) { |
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2747 if (n < MaxSubklassPrintSize) { |
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2748 sub->print_value_on(st); |
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2749 st->print(" "); |
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2750 } |
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2751 } |
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2752 if (n >= MaxSubklassPrintSize) st->print("(%d more klasses...)", n - MaxSubklassPrintSize); |
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2753 st->cr(); |
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2754 |
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2755 if (is_interface()) { |
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2756 st->print_cr(BULLET"nof implementors: %d", nof_implementors()); |
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2757 if (nof_implementors() == 1) { |
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2758 st->print_cr(BULLET"implementor: "); |
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2759 st->print(" "); |
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2760 implementor()->print_value_on(st); |
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2761 st->cr(); |
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|
2762 } |
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|
2763 } |
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|
2764 |
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2765 st->print(BULLET"arrays: "); array_klasses()->print_value_on_maybe_null(st); st->cr(); |
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2766 st->print(BULLET"methods: "); methods()->print_value_on(st); st->cr(); |
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2767 if (Verbose) { |
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2768 Array<Method*>* method_array = methods(); |
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2769 for(int i = 0; i < method_array->length(); i++) { |
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2770 st->print("%d : ", i); method_array->at(i)->print_value(); st->cr(); |
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2771 } |
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|
2772 } |
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2773 st->print(BULLET"method ordering: "); method_ordering()->print_value_on(st); st->cr(); |
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2774 st->print(BULLET"local interfaces: "); local_interfaces()->print_value_on(st); st->cr(); |
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2775 st->print(BULLET"trans. interfaces: "); transitive_interfaces()->print_value_on(st); st->cr(); |
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2776 st->print(BULLET"constants: "); constants()->print_value_on(st); st->cr(); |
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2777 if (class_loader_data() != NULL) { |
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2778 st->print(BULLET"class loader data: "); |
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2779 class_loader_data()->print_value_on(st); |
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2780 st->cr(); |
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|
2781 } |
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2782 st->print(BULLET"protection domain: "); ((InstanceKlass*)this)->protection_domain()->print_value_on(st); st->cr(); |
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2783 st->print(BULLET"host class: "); host_klass()->print_value_on_maybe_null(st); st->cr(); |
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2784 st->print(BULLET"signers: "); signers()->print_value_on(st); st->cr(); |
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2785 st->print(BULLET"init_lock: "); ((oop)init_lock())->print_value_on(st); st->cr(); |
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2786 if (source_file_name() != NULL) { |
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2787 st->print(BULLET"source file: "); |
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2788 source_file_name()->print_value_on(st); |
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2789 st->cr(); |
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|
2790 } |
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2791 if (source_debug_extension() != NULL) { |
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|
2792 st->print(BULLET"source debug extension: "); |
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2793 st->print("%s", source_debug_extension()); |
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|
2794 st->cr(); |
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|
2795 } |
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2796 st->print(BULLET"annotations: "); annotations()->print_value_on(st); st->cr(); |
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2797 { |
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|
2798 ResourceMark rm; |
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|
2799 // PreviousVersionInfo objects returned via PreviousVersionWalker |
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2800 // contain a GrowableArray of handles. We have to clean up the |
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2801 // GrowableArray _after_ the PreviousVersionWalker destructor |
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2802 // has destroyed the handles. |
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|
2803 { |
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|
2804 bool have_pv = false; |
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|
2805 PreviousVersionWalker pvw((InstanceKlass*)this); |
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2806 for (PreviousVersionInfo * pv_info = pvw.next_previous_version(); |
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2807 pv_info != NULL; pv_info = pvw.next_previous_version()) { |
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2808 if (!have_pv) |
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2809 st->print(BULLET"previous version: "); |
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|
2810 have_pv = true; |
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2811 pv_info->prev_constant_pool_handle()()->print_value_on(st); |
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|
2812 } |
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|
2813 if (have_pv) st->cr(); |
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2814 } // pvw is cleaned up |
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2815 } // rm is cleaned up |
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|
2816 |
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|
2817 if (generic_signature() != NULL) { |
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|
2818 st->print(BULLET"generic signature: "); |
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|
2819 generic_signature()->print_value_on(st); |
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|
2820 st->cr(); |
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|
2821 } |
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2822 st->print(BULLET"inner classes: "); inner_classes()->print_value_on(st); st->cr(); |
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2823 st->print(BULLET"java mirror: "); java_mirror()->print_value_on(st); st->cr(); |
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2824 st->print(BULLET"vtable length %d (start addr: " INTPTR_FORMAT ")", vtable_length(), start_of_vtable()); st->cr(); |
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2825 st->print(BULLET"itable length %d (start addr: " INTPTR_FORMAT ")", itable_length(), start_of_itable()); st->cr(); |
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2826 st->print_cr(BULLET"---- static fields (%d words):", static_field_size()); |
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|
2827 FieldPrinter print_static_field(st); |
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|
2828 ((InstanceKlass*)this)->do_local_static_fields(&print_static_field); |
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2829 st->print_cr(BULLET"---- non-static fields (%d words):", nonstatic_field_size()); |
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|
2830 FieldPrinter print_nonstatic_field(st); |
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|
2831 ((InstanceKlass*)this)->do_nonstatic_fields(&print_nonstatic_field); |
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|
2832 |
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|
2833 st->print(BULLET"non-static oop maps: "); |
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2834 OopMapBlock* map = start_of_nonstatic_oop_maps(); |
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|
2835 OopMapBlock* end_map = map + nonstatic_oop_map_count(); |
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|
2836 while (map < end_map) { |
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2837 st->print("%d-%d ", map->offset(), map->offset() + heapOopSize*(map->count() - 1)); |
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|
2838 map++; |
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|
2839 } |
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|
2840 st->cr(); |
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|
2841 } |
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|
2842 |
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|
2843 #endif //PRODUCT |
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|
2844 |
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|
2845 void InstanceKlass::print_value_on(outputStream* st) const { |
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|
2846 assert(is_klass(), "must be klass"); |
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|
2847 name()->print_value_on(st); |
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|
2848 } |
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|
2849 |
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|
2850 #ifndef PRODUCT |
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|
2851 |
0 | 2852 void FieldPrinter::do_field(fieldDescriptor* fd) { |
665
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|
2853 _st->print(BULLET); |
2376
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2357
diff
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|
2854 if (_obj == NULL) { |
0 | 2855 fd->print_on(_st); |
2856 _st->cr(); | |
2857 } else { | |
2858 fd->print_on_for(_st, _obj); | |
2859 _st->cr(); | |
2860 } | |
2861 } | |
2862 | |
2863 | |
6725
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|
2864 void InstanceKlass::oop_print_on(oop obj, outputStream* st) { |
0 | 2865 Klass::oop_print_on(obj, st); |
2866 | |
6725
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|
2867 if (this == SystemDictionary::String_klass()) { |
0 | 2868 typeArrayOop value = java_lang_String::value(obj); |
2869 juint offset = java_lang_String::offset(obj); | |
2870 juint length = java_lang_String::length(obj); | |
2871 if (value != NULL && | |
2872 value->is_typeArray() && | |
2873 offset <= (juint) value->length() && | |
2874 offset + length <= (juint) value->length()) { | |
665
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|
2875 st->print(BULLET"string: "); |
0 | 2876 Handle h_obj(obj); |
2877 java_lang_String::print(h_obj, st); | |
2878 st->cr(); | |
2879 if (!WizardMode) return; // that is enough | |
2880 } | |
2881 } | |
2882 | |
665
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|
2883 st->print_cr(BULLET"---- fields (total size %d words):", oop_size(obj)); |
2376
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|
2884 FieldPrinter print_field(st, obj); |
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7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2357
diff
changeset
|
2885 do_nonstatic_fields(&print_field); |
0 | 2886 |
6725
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6964458: Reimplement class meta-data storage to use native memory
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2887 if (this == SystemDictionary::Class_klass()) { |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
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parents:
605
diff
changeset
|
2888 st->print(BULLET"signature: "); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
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diff
changeset
|
2889 java_lang_Class::print_signature(obj, st); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
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diff
changeset
|
2890 st->cr(); |
6725
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6964458: Reimplement class meta-data storage to use native memory
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changeset
|
2891 Klass* mirrored_klass = java_lang_Class::as_Klass(obj); |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2892 st->print(BULLET"fake entry for mirror: "); |
6725
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coleenp
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changeset
|
2893 mirrored_klass->print_value_on_maybe_null(st); |
0 | 2894 st->cr(); |
6725
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|
2895 Klass* array_klass = java_lang_Class::array_klass(obj); |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2896 st->print(BULLET"fake entry for array: "); |
6725
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6964458: Reimplement class meta-data storage to use native memory
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changeset
|
2897 array_klass->print_value_on_maybe_null(st); |
0 | 2898 st->cr(); |
2376
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7017732: move static fields into Class to prepare for perm gen removal
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parents:
2357
diff
changeset
|
2899 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
never
parents:
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diff
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|
2900 st->print_cr(BULLET"fake entry for static_oop_field_count: %d", java_lang_Class::static_oop_field_count(obj)); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
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|
2901 Klass* real_klass = java_lang_Class::as_Klass(obj); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
2902 if (real_klass != NULL && real_klass->oop_is_instance()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
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|
2903 InstanceKlass::cast(real_klass)->do_local_static_fields(&print_field); |
2376
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2357
diff
changeset
|
2904 } |
6725
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6964458: Reimplement class meta-data storage to use native memory
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parents:
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|
2905 } else if (this == SystemDictionary::MethodType_klass()) { |
1039
987e948ebbc8
6815692: method handle code needs some cleanup (post-6655638)
jrose
parents:
997
diff
changeset
|
2906 st->print(BULLET"signature: "); |
2357
8033953d67ff
7012648: move JSR 292 to package java.lang.invoke and adjust names
jrose
parents:
2334
diff
changeset
|
2907 java_lang_invoke_MethodType::print_signature(obj, st); |
1039
987e948ebbc8
6815692: method handle code needs some cleanup (post-6655638)
jrose
parents:
997
diff
changeset
|
2908 st->cr(); |
0 | 2909 } |
2910 } | |
2911 | |
1155
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1144
diff
changeset
|
2912 #endif //PRODUCT |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1144
diff
changeset
|
2913 |
6725
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|
2914 void InstanceKlass::oop_print_value_on(oop obj, outputStream* st) { |
0 | 2915 st->print("a "); |
2916 name()->print_value_on(st); | |
2917 obj->print_address_on(st); | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
2918 if (this == SystemDictionary::String_klass() |
665
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6814659: separable cleanups and subroutines for 6655638
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parents:
605
diff
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|
2919 && java_lang_String::value(obj) != NULL) { |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
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diff
changeset
|
2920 ResourceMark rm; |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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diff
changeset
|
2921 int len = java_lang_String::length(obj); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
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diff
changeset
|
2922 int plen = (len < 24 ? len : 12); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
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diff
changeset
|
2923 char* str = java_lang_String::as_utf8_string(obj, 0, plen); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
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diff
changeset
|
2924 st->print(" = \"%s\"", str); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
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diff
changeset
|
2925 if (len > plen) |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2926 st->print("...[%d]", len); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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|
2927 } else if (this == SystemDictionary::Class_klass()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
2928 Klass* k = java_lang_Class::as_Klass(obj); |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2929 st->print(" = "); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
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diff
changeset
|
2930 if (k != NULL) { |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2931 k->print_value_on(st); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2932 } else { |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
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diff
changeset
|
2933 const char* tname = type2name(java_lang_Class::primitive_type(obj)); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
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diff
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|
2934 st->print("%s", tname ? tname : "type?"); |
c89f86385056
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jrose
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diff
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|
2935 } |
6725
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|
2936 } else if (this == SystemDictionary::MethodType_klass()) { |
1039
987e948ebbc8
6815692: method handle code needs some cleanup (post-6655638)
jrose
parents:
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diff
changeset
|
2937 st->print(" = "); |
2357
8033953d67ff
7012648: move JSR 292 to package java.lang.invoke and adjust names
jrose
parents:
2334
diff
changeset
|
2938 java_lang_invoke_MethodType::print_signature(obj, st); |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
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parents:
605
diff
changeset
|
2939 } else if (java_lang_boxing_object::is_instance(obj)) { |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
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diff
changeset
|
2940 st->print(" = "); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
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diff
changeset
|
2941 java_lang_boxing_object::print(obj, st); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
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|
2942 } else if (this == SystemDictionary::LambdaForm_klass()) { |
6266
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
2943 oop vmentry = java_lang_invoke_LambdaForm::vmentry(obj); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
2944 if (vmentry != NULL) { |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
2945 st->print(" => "); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
2946 vmentry->print_value_on(st); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
2947 } |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
2948 } else if (this == SystemDictionary::MemberName_klass()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
2949 Metadata* vmtarget = java_lang_invoke_MemberName::vmtarget(obj); |
6266
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
2950 if (vmtarget != NULL) { |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
2951 st->print(" = "); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
2952 vmtarget->print_value_on(st); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
2953 } else { |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
2954 java_lang_invoke_MemberName::clazz(obj)->print_value_on(st); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
2955 st->print("."); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
2956 java_lang_invoke_MemberName::name(obj)->print_value_on(st); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
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|
2957 } |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
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parents:
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diff
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|
2958 } |
0 | 2959 } |
2960 | |
6725
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coleenp
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|
2961 const char* InstanceKlass::internal_name() const { |
0 | 2962 return external_name(); |
2963 } | |
2964 | |
7956 | 2965 #if INCLUDE_SERVICES |
2966 // Size Statistics | |
2967 void InstanceKlass::collect_statistics(KlassSizeStats *sz) const { | |
2968 Klass::collect_statistics(sz); | |
2969 | |
2970 sz->_inst_size = HeapWordSize * size_helper(); | |
2971 sz->_vtab_bytes = HeapWordSize * align_object_offset(vtable_length()); | |
2972 sz->_itab_bytes = HeapWordSize * align_object_offset(itable_length()); | |
2973 sz->_nonstatic_oopmap_bytes = HeapWordSize * | |
2974 ((is_interface() || is_anonymous()) ? | |
2975 align_object_offset(nonstatic_oop_map_size()) : | |
2976 nonstatic_oop_map_size()); | |
2977 | |
2978 int n = 0; | |
2979 n += (sz->_methods_array_bytes = sz->count_array(methods())); | |
2980 n += (sz->_method_ordering_bytes = sz->count_array(method_ordering())); | |
2981 n += (sz->_local_interfaces_bytes = sz->count_array(local_interfaces())); | |
2982 n += (sz->_transitive_interfaces_bytes = sz->count_array(transitive_interfaces())); | |
2983 n += (sz->_signers_bytes = sz->count_array(signers())); | |
2984 n += (sz->_fields_bytes = sz->count_array(fields())); | |
2985 n += (sz->_inner_classes_bytes = sz->count_array(inner_classes())); | |
2986 sz->_ro_bytes += n; | |
2987 | |
2988 const ConstantPool* cp = constants(); | |
2989 if (cp) { | |
2990 cp->collect_statistics(sz); | |
2991 } | |
2992 | |
2993 const Annotations* anno = annotations(); | |
2994 if (anno) { | |
2995 anno->collect_statistics(sz); | |
2996 } | |
2997 | |
2998 const Array<Method*>* methods_array = methods(); | |
2999 if (methods()) { | |
3000 for (int i = 0; i < methods_array->length(); i++) { | |
3001 Method* method = methods_array->at(i); | |
3002 if (method) { | |
3003 sz->_method_count ++; | |
3004 method->collect_statistics(sz); | |
3005 } | |
3006 } | |
3007 } | |
3008 } | |
3009 #endif // INCLUDE_SERVICES | |
3010 | |
0 | 3011 // Verification |
3012 | |
3013 class VerifyFieldClosure: public OopClosure { | |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
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52
diff
changeset
|
3014 protected: |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
52
diff
changeset
|
3015 template <class T> void do_oop_work(T* p) { |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
52
diff
changeset
|
3016 oop obj = oopDesc::load_decode_heap_oop(p); |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
52
diff
changeset
|
3017 if (!obj->is_oop_or_null()) { |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
52
diff
changeset
|
3018 tty->print_cr("Failed: " PTR_FORMAT " -> " PTR_FORMAT, p, (address)obj); |
0 | 3019 Universe::print(); |
3020 guarantee(false, "boom"); | |
3021 } | |
3022 } | |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
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52
diff
changeset
|
3023 public: |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
52
diff
changeset
|
3024 virtual void do_oop(oop* p) { VerifyFieldClosure::do_oop_work(p); } |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
52
diff
changeset
|
3025 virtual void do_oop(narrowOop* p) { VerifyFieldClosure::do_oop_work(p); } |
0 | 3026 }; |
3027 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
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|
3028 void InstanceKlass::verify_on(outputStream* st) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
3029 Klass::verify_on(st); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
3030 Thread *thread = Thread::current(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
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|
3031 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
3032 #ifndef PRODUCT |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
3033 // Avoid redundant verifies |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
3034 if (_verify_count == Universe::verify_count()) return; |
da91efe96a93
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coleenp
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6266
diff
changeset
|
3035 _verify_count = Universe::verify_count(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
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|
3036 #endif |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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6266
diff
changeset
|
3037 // Verify that klass is present in SystemDictionary |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
3038 if (is_loaded() && !is_anonymous()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
3039 Symbol* h_name = name(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
3040 SystemDictionary::verify_obj_klass_present(h_name, class_loader_data()); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
3041 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
3042 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
3043 // Verify static fields |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
3044 VerifyFieldClosure blk; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
3045 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
3046 // Verify vtables |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
3047 if (is_linked()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
3048 ResourceMark rm(thread); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
3049 // $$$ This used to be done only for m/s collections. Doing it |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
3050 // always seemed a valid generalization. (DLD -- 6/00) |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
3051 vtable()->verify(st); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
3052 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
3053 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
3054 // Verify first subklass |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
3055 if (subklass_oop() != NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
3056 guarantee(subklass_oop()->is_metadata(), "should be in metaspace"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
3057 guarantee(subklass_oop()->is_klass(), "should be klass"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
3058 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
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|
3059 |
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3060 // Verify siblings |
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3061 Klass* super = this->super(); |
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3062 Klass* sib = next_sibling(); |
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3063 if (sib != NULL) { |
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3064 if (sib == this) { |
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3065 fatal(err_msg("subclass points to itself " PTR_FORMAT, sib)); |
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3066 } |
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|
3067 |
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3068 guarantee(sib->is_metadata(), "should be in metaspace"); |
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3069 guarantee(sib->is_klass(), "should be klass"); |
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3070 guarantee(sib->super() == super, "siblings should have same superklass"); |
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3071 } |
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|
3072 |
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3073 // Verify implementor fields |
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|
3074 Klass* im = implementor(); |
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3075 if (im != NULL) { |
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3076 guarantee(is_interface(), "only interfaces should have implementor set"); |
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3077 guarantee(im->is_klass(), "should be klass"); |
6983 | 3078 guarantee(!im->is_interface() || im == this, |
6725
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3079 "implementors cannot be interfaces"); |
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|
3080 } |
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|
3081 |
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3082 // Verify local interfaces |
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|
3083 if (local_interfaces()) { |
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3084 Array<Klass*>* local_interfaces = this->local_interfaces(); |
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3085 for (int j = 0; j < local_interfaces->length(); j++) { |
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3086 Klass* e = local_interfaces->at(j); |
6983 | 3087 guarantee(e->is_klass() && e->is_interface(), "invalid local interface"); |
6725
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3088 } |
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|
3089 } |
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|
3090 |
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3091 // Verify transitive interfaces |
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3092 if (transitive_interfaces() != NULL) { |
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3093 Array<Klass*>* transitive_interfaces = this->transitive_interfaces(); |
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3094 for (int j = 0; j < transitive_interfaces->length(); j++) { |
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3095 Klass* e = transitive_interfaces->at(j); |
6983 | 3096 guarantee(e->is_klass() && e->is_interface(), "invalid transitive interface"); |
6725
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|
3097 } |
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|
3098 } |
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|
3099 |
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3100 // Verify methods |
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|
3101 if (methods() != NULL) { |
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|
3102 Array<Method*>* methods = this->methods(); |
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3103 for (int j = 0; j < methods->length(); j++) { |
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3104 guarantee(methods->at(j)->is_metadata(), "should be in metaspace"); |
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3105 guarantee(methods->at(j)->is_method(), "non-method in methods array"); |
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|
3106 } |
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|
3107 for (int j = 0; j < methods->length() - 1; j++) { |
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3108 Method* m1 = methods->at(j); |
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3109 Method* m2 = methods->at(j + 1); |
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3110 guarantee(m1->name()->fast_compare(m2->name()) <= 0, "methods not sorted correctly"); |
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|
3111 } |
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|
3112 } |
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|
3113 |
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3114 // Verify method ordering |
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|
3115 if (method_ordering() != NULL) { |
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3116 Array<int>* method_ordering = this->method_ordering(); |
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3117 int length = method_ordering->length(); |
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3118 if (JvmtiExport::can_maintain_original_method_order() || |
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|
3119 (UseSharedSpaces && length != 0)) { |
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|
3120 guarantee(length == methods()->length(), "invalid method ordering length"); |
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|
3121 jlong sum = 0; |
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|
3122 for (int j = 0; j < length; j++) { |
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3123 int original_index = method_ordering->at(j); |
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|
3124 guarantee(original_index >= 0, "invalid method ordering index"); |
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|
3125 guarantee(original_index < length, "invalid method ordering index"); |
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|
3126 sum += original_index; |
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|
3127 } |
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|
3128 // Verify sum of indices 0,1,...,length-1 |
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|
3129 guarantee(sum == ((jlong)length*(length-1))/2, "invalid method ordering sum"); |
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|
3130 } else { |
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|
3131 guarantee(length == 0, "invalid method ordering length"); |
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|
3132 } |
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|
3133 } |
da91efe96a93
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|
3134 |
da91efe96a93
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|
3135 // Verify JNI static field identifiers |
da91efe96a93
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|
3136 if (jni_ids() != NULL) { |
da91efe96a93
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|
3137 jni_ids()->verify(this); |
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|
3138 } |
da91efe96a93
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|
3139 |
da91efe96a93
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|
3140 // Verify other fields |
da91efe96a93
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|
3141 if (array_klasses() != NULL) { |
da91efe96a93
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|
3142 guarantee(array_klasses()->is_metadata(), "should be in metaspace"); |
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|
3143 guarantee(array_klasses()->is_klass(), "should be klass"); |
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|
3144 } |
da91efe96a93
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|
3145 if (constants() != NULL) { |
da91efe96a93
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|
3146 guarantee(constants()->is_metadata(), "should be in metaspace"); |
da91efe96a93
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|
3147 guarantee(constants()->is_constantPool(), "should be constant pool"); |
da91efe96a93
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|
3148 } |
da91efe96a93
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|
3149 if (protection_domain() != NULL) { |
da91efe96a93
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|
3150 guarantee(protection_domain()->is_oop(), "should be oop"); |
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|
3151 } |
da91efe96a93
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|
3152 if (host_klass() != NULL) { |
da91efe96a93
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|
3153 guarantee(host_klass()->is_metadata(), "should be in metaspace"); |
da91efe96a93
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|
3154 guarantee(host_klass()->is_klass(), "should be klass"); |
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|
3155 } |
da91efe96a93
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|
3156 if (signers() != NULL) { |
da91efe96a93
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|
3157 guarantee(signers()->is_objArray(), "should be obj array"); |
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|
3158 } |
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|
3159 } |
da91efe96a93
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|
3160 |
da91efe96a93
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|
3161 void InstanceKlass::oop_verify_on(oop obj, outputStream* st) { |
0 | 3162 Klass::oop_verify_on(obj, st); |
3163 VerifyFieldClosure blk; | |
6725
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|
3164 obj->oop_iterate_no_header(&blk); |
0 | 3165 } |
3166 | |
6725
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|
3167 |
113
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|
3168 // JNIid class for jfieldIDs only |
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|
3169 // Note to reviewers: |
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|
3170 // These JNI functions are just moved over to column 1 and not changed |
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|
3171 // in the compressed oops workspace. |
6725
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|
3172 JNIid::JNIid(Klass* holder, int offset, JNIid* next) { |
113
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|
3173 _holder = holder; |
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|
3174 _offset = offset; |
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|
3175 _next = next; |
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|
3176 debug_only(_is_static_field_id = false;) |
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|
3177 } |
0 | 3178 |
3179 | |
113
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|
3180 JNIid* JNIid::find(int offset) { |
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|
3181 JNIid* current = this; |
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|
3182 while (current != NULL) { |
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|
3183 if (current->offset() == offset) return current; |
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|
3184 current = current->next(); |
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diff
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|
3185 } |
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diff
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|
3186 return NULL; |
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diff
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|
3187 } |
0 | 3188 |
3189 void JNIid::deallocate(JNIid* current) { | |
113
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|
3190 while (current != NULL) { |
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|
3191 JNIid* next = current->next(); |
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3192 delete current; |
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3193 current = next; |
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3194 } |
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3195 } |
0 | 3196 |
3197 | |
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3198 void JNIid::verify(Klass* holder) { |
6735
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3199 int first_field_offset = InstanceMirrorKlass::offset_of_static_fields(); |
113
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3200 int end_field_offset; |
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3201 end_field_offset = first_field_offset + (InstanceKlass::cast(holder)->static_field_size() * wordSize); |
0 | 3202 |
113
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3203 JNIid* current = this; |
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3204 while (current != NULL) { |
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3205 guarantee(current->holder() == holder, "Invalid klass in JNIid"); |
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3206 #ifdef ASSERT |
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3207 int o = current->offset(); |
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3208 if (current->is_static_field_id()) { |
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3209 guarantee(o >= first_field_offset && o < end_field_offset, "Invalid static field offset in JNIid"); |
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3210 } |
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3211 #endif |
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3212 current = current->next(); |
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3213 } |
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3214 } |
0 | 3215 |
3216 | |
3217 #ifdef ASSERT | |
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3218 void InstanceKlass::set_init_state(ClassState state) { |
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3219 bool good_state = is_shared() ? (_init_state <= state) |
113
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3220 : (_init_state < state); |
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3221 assert(good_state || state == allocated, "illegal state transition"); |
4739
52b5d32fbfaf
7117052: instanceKlass::_init_state can be u1 type
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3222 _init_state = (u1)state; |
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3223 } |
0 | 3224 #endif |
3225 | |
3226 | |
3227 // RedefineClasses() support for previous versions: | |
3228 | |
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3229 // Purge previous versions |
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3230 static void purge_previous_versions_internal(InstanceKlass* ik, int emcp_method_count) { |
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3231 if (ik->previous_versions() != NULL) { |
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3232 // This klass has previous versions so see what we can cleanup |
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3233 // while it is safe to do so. |
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3234 |
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3235 int deleted_count = 0; // leave debugging breadcrumbs |
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3236 int live_count = 0; |
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3237 ClassLoaderData* loader_data = ik->class_loader_data() == NULL ? |
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3238 ClassLoaderData::the_null_class_loader_data() : |
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3239 ik->class_loader_data(); |
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3240 |
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3241 // RC_TRACE macro has an embedded ResourceMark |
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3242 RC_TRACE(0x00000200, ("purge: %s: previous version length=%d", |
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3243 ik->external_name(), ik->previous_versions()->length())); |
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3244 |
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3245 for (int i = ik->previous_versions()->length() - 1; i >= 0; i--) { |
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3246 // check the previous versions array |
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3247 PreviousVersionNode * pv_node = ik->previous_versions()->at(i); |
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3248 ConstantPool* cp_ref = pv_node->prev_constant_pool(); |
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3249 assert(cp_ref != NULL, "cp ref was unexpectedly cleared"); |
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3250 |
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3251 ConstantPool* pvcp = cp_ref; |
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3252 if (!pvcp->on_stack()) { |
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3253 // If the constant pool isn't on stack, none of the methods |
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3254 // are executing. Delete all the methods, the constant pool and |
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3255 // and this previous version node. |
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3256 GrowableArray<Method*>* method_refs = pv_node->prev_EMCP_methods(); |
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3257 if (method_refs != NULL) { |
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3258 for (int j = method_refs->length() - 1; j >= 0; j--) { |
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3259 Method* method = method_refs->at(j); |
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3260 assert(method != NULL, "method ref was unexpectedly cleared"); |
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3261 method_refs->remove_at(j); |
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3262 // method will be freed with associated class. |
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3263 } |
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3264 } |
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3265 // Remove the constant pool |
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3266 delete pv_node; |
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3267 // Since we are traversing the array backwards, we don't have to |
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3268 // do anything special with the index. |
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3269 ik->previous_versions()->remove_at(i); |
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3270 deleted_count++; |
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3271 continue; |
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3272 } else { |
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3273 RC_TRACE(0x00000200, ("purge: previous version @%d is alive", i)); |
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3274 assert(pvcp->pool_holder() != NULL, "Constant pool with no holder"); |
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3275 guarantee (!loader_data->is_unloading(), "unloaded classes can't be on the stack"); |
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3276 live_count++; |
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3277 } |
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|
3278 |
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3279 // At least one method is live in this previous version, clean out |
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3280 // the others or mark them as obsolete. |
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3281 GrowableArray<Method*>* method_refs = pv_node->prev_EMCP_methods(); |
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3282 if (method_refs != NULL) { |
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3283 RC_TRACE(0x00000200, ("purge: previous methods length=%d", |
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3284 method_refs->length())); |
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3285 for (int j = method_refs->length() - 1; j >= 0; j--) { |
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3286 Method* method = method_refs->at(j); |
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3287 assert(method != NULL, "method ref was unexpectedly cleared"); |
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3288 |
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3289 // Remove the emcp method if it's not executing |
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3290 // If it's been made obsolete by a redefinition of a non-emcp |
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3291 // method, mark it as obsolete but leave it to clean up later. |
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3292 if (!method->on_stack()) { |
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3293 method_refs->remove_at(j); |
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3294 } else if (emcp_method_count == 0) { |
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3295 method->set_is_obsolete(); |
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3296 } else { |
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3297 // RC_TRACE macro has an embedded ResourceMark |
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3298 RC_TRACE(0x00000200, |
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3299 ("purge: %s(%s): prev method @%d in version @%d is alive", |
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3300 method->name()->as_C_string(), |
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3301 method->signature()->as_C_string(), j, i)); |
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3302 } |
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3303 } |
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3304 } |
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3305 } |
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3306 assert(ik->previous_versions()->length() == live_count, "sanity check"); |
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3307 RC_TRACE(0x00000200, |
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3308 ("purge: previous version stats: live=%d, deleted=%d", live_count, |
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3309 deleted_count)); |
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3310 } |
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3311 } |
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3312 |
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3313 // External interface for use during class unloading. |
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3314 void InstanceKlass::purge_previous_versions(InstanceKlass* ik) { |
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3315 // Call with >0 emcp methods since they are not currently being redefined. |
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3316 purge_previous_versions_internal(ik, 1); |
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3317 } |
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3318 |
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3319 |
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3320 // Potentially add an information node that contains pointers to the |
0 | 3321 // interesting parts of the previous version of the_class. |
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3322 // This is also where we clean out any unused references. |
977
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|
3323 // Note that while we delete nodes from the _previous_versions |
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3324 // array, we never delete the array itself until the klass is |
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3325 // unloaded. The has_been_redefined() query depends on that fact. |
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3326 // |
6725
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3327 void InstanceKlass::add_previous_version(instanceKlassHandle ikh, |
113
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3328 BitMap* emcp_methods, int emcp_method_count) { |
0 | 3329 assert(Thread::current()->is_VM_thread(), |
113
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3330 "only VMThread can add previous versions"); |
0 | 3331 |
3332 if (_previous_versions == NULL) { | |
3333 // This is the first previous version so make some space. | |
3334 // Start with 2 elements under the assumption that the class | |
3335 // won't be redefined much. | |
6197 | 3336 _previous_versions = new (ResourceObj::C_HEAP, mtClass) |
0 | 3337 GrowableArray<PreviousVersionNode *>(2, true); |
3338 } | |
3339 | |
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3340 ConstantPool* cp_ref = ikh->constants(); |
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3341 |
0 | 3342 // RC_TRACE macro has an embedded ResourceMark |
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3343 RC_TRACE(0x00000400, ("adding previous version ref for %s @%d, EMCP_cnt=%d " |
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3344 "on_stack=%d", |
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3345 ikh->external_name(), _previous_versions->length(), emcp_method_count, |
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3346 cp_ref->on_stack())); |
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3347 |
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3348 // If the constant pool for this previous version of the class |
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3349 // is not marked as being on the stack, then none of the methods |
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3350 // in this previous version of the class are on the stack so |
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3351 // we don't need to create a new PreviousVersionNode. However, |
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3352 // we still need to examine older previous versions below. |
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3353 Array<Method*>* old_methods = ikh->methods(); |
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3354 |
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3355 if (cp_ref->on_stack()) { |
0 | 3356 PreviousVersionNode * pv_node = NULL; |
3357 if (emcp_method_count == 0) { | |
6725
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3358 // non-shared ConstantPool gets a reference |
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3359 pv_node = new PreviousVersionNode(cp_ref, !cp_ref->is_shared(), NULL); |
0 | 3360 RC_TRACE(0x00000400, |
6725
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3361 ("add: all methods are obsolete; flushing any EMCP refs")); |
0 | 3362 } else { |
3363 int local_count = 0; | |
6725
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3364 GrowableArray<Method*>* method_refs = new (ResourceObj::C_HEAP, mtClass) |
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3365 GrowableArray<Method*>(emcp_method_count, true); |
0 | 3366 for (int i = 0; i < old_methods->length(); i++) { |
3367 if (emcp_methods->at(i)) { | |
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3368 // this old method is EMCP. Save it only if it's on the stack |
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3369 Method* old_method = old_methods->at(i); |
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3370 if (old_method->on_stack()) { |
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3371 method_refs->append(old_method); |
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3372 } |
0 | 3373 if (++local_count >= emcp_method_count) { |
3374 // no more EMCP methods so bail out now | |
3375 break; | |
3376 } | |
3377 } | |
3378 } | |
6725
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3379 // non-shared ConstantPool gets a reference |
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3380 pv_node = new PreviousVersionNode(cp_ref, !cp_ref->is_shared(), method_refs); |
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3381 } |
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3382 // append new previous version. |
0 | 3383 _previous_versions->append(pv_node); |
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3384 } |
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3385 |
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3386 // Since the caller is the VMThread and we are at a safepoint, this |
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3387 // is a good time to clear out unused references. |
0 | 3388 |
3389 RC_TRACE(0x00000400, ("add: previous version length=%d", | |
3390 _previous_versions->length())); | |
3391 | |
6725
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3392 // Purge previous versions not executing on the stack |
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3393 purge_previous_versions_internal(this, emcp_method_count); |
0 | 3394 |
3395 int obsolete_method_count = old_methods->length() - emcp_method_count; | |
3396 | |
3397 if (emcp_method_count != 0 && obsolete_method_count != 0 && | |
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3398 _previous_versions->length() > 0) { |
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3399 // We have a mix of obsolete and EMCP methods so we have to |
0 | 3400 // clear out any matching EMCP method entries the hard way. |
3401 int local_count = 0; | |
3402 for (int i = 0; i < old_methods->length(); i++) { | |
3403 if (!emcp_methods->at(i)) { | |
3404 // only obsolete methods are interesting | |
6725
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3405 Method* old_method = old_methods->at(i); |
2177
3582bf76420e
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|
3406 Symbol* m_name = old_method->name(); |
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|
3407 Symbol* m_signature = old_method->signature(); |
0 | 3408 |
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3409 // we might not have added the last entry |
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3410 for (int j = _previous_versions->length() - 1; j >= 0; j--) { |
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3411 // check the previous versions array for non executing obsolete methods |
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3412 PreviousVersionNode * pv_node = _previous_versions->at(j); |
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3413 |
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3414 GrowableArray<Method*>* method_refs = pv_node->prev_EMCP_methods(); |
0 | 3415 if (method_refs == NULL) { |
3416 // We have run into a PreviousVersion generation where | |
3417 // all methods were made obsolete during that generation's | |
3418 // RedefineClasses() operation. At the time of that | |
3419 // operation, all EMCP methods were flushed so we don't | |
3420 // have to go back any further. | |
3421 // | |
3422 // A NULL method_refs is different than an empty method_refs. | |
3423 // We cannot infer any optimizations about older generations | |
3424 // from an empty method_refs for the current generation. | |
3425 break; | |
3426 } | |
3427 | |
3428 for (int k = method_refs->length() - 1; k >= 0; k--) { | |
6725
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3429 Method* method = method_refs->at(k); |
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3430 |
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3431 if (!method->is_obsolete() && |
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3432 method->name() == m_name && |
0 | 3433 method->signature() == m_signature) { |
3434 // The current RedefineClasses() call has made all EMCP | |
3435 // versions of this method obsolete so mark it as obsolete | |
6725
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3436 // and remove the reference. |
0 | 3437 RC_TRACE(0x00000400, |
3438 ("add: %s(%s): flush obsolete method @%d in version @%d", | |
3439 m_name->as_C_string(), m_signature->as_C_string(), k, j)); | |
3440 | |
3441 method->set_is_obsolete(); | |
6725
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3442 // Leave obsolete methods on the previous version list to |
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|
3443 // clean up later. |
0 | 3444 break; |
3445 } | |
3446 } | |
3447 | |
3448 // The previous loop may not find a matching EMCP method, but | |
3449 // that doesn't mean that we can optimize and not go any | |
3450 // further back in the PreviousVersion generations. The EMCP | |
6725
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3451 // method for this generation could have already been deleted, |
0 | 3452 // but there still may be an older EMCP method that has not |
6725
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|
3453 // been deleted. |
0 | 3454 } |
3455 | |
3456 if (++local_count >= obsolete_method_count) { | |
3457 // no more obsolete methods so bail out now | |
3458 break; | |
3459 } | |
3460 } | |
3461 } | |
3462 } | |
3463 } // end add_previous_version() | |
3464 | |
3465 | |
6725
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3466 // Determine if InstanceKlass has a previous version. |
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3467 bool InstanceKlass::has_previous_version() const { |
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3468 return (_previous_versions != NULL && _previous_versions->length() > 0); |
0 | 3469 } // end has_previous_version() |
3470 | |
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3471 |
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3472 Method* InstanceKlass::method_with_idnum(int idnum) { |
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3473 Method* m = NULL; |
0 | 3474 if (idnum < methods()->length()) { |
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3475 m = methods()->at(idnum); |
0 | 3476 } |
3477 if (m == NULL || m->method_idnum() != idnum) { | |
3478 for (int index = 0; index < methods()->length(); ++index) { | |
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3479 m = methods()->at(index); |
0 | 3480 if (m->method_idnum() == idnum) { |
3481 return m; | |
3482 } | |
3483 } | |
3484 } | |
3485 return m; | |
3486 } | |
3487 | |
3488 | |
3489 // Construct a PreviousVersionNode entry for the array hung off | |
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3490 // the InstanceKlass. |
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3491 PreviousVersionNode::PreviousVersionNode(ConstantPool* prev_constant_pool, |
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3492 bool prev_cp_is_weak, GrowableArray<Method*>* prev_EMCP_methods) { |
0 | 3493 |
3494 _prev_constant_pool = prev_constant_pool; | |
47
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|
3495 _prev_cp_is_weak = prev_cp_is_weak; |
0 | 3496 _prev_EMCP_methods = prev_EMCP_methods; |
3497 } | |
3498 | |
3499 | |
3500 // Destroy a PreviousVersionNode | |
3501 PreviousVersionNode::~PreviousVersionNode() { | |
3502 if (_prev_constant_pool != NULL) { | |
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3503 _prev_constant_pool = NULL; |
0 | 3504 } |
3505 | |
3506 if (_prev_EMCP_methods != NULL) { | |
3507 delete _prev_EMCP_methods; | |
3508 } | |
3509 } | |
3510 | |
3511 | |
3512 // Construct a PreviousVersionInfo entry | |
3513 PreviousVersionInfo::PreviousVersionInfo(PreviousVersionNode *pv_node) { | |
3514 _prev_constant_pool_handle = constantPoolHandle(); // NULL handle | |
3515 _prev_EMCP_method_handles = NULL; | |
3516 | |
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3517 ConstantPool* cp = pv_node->prev_constant_pool(); |
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3518 assert(cp != NULL, "constant pool ref was unexpectedly cleared"); |
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3519 if (cp == NULL) { |
0 | 3520 return; // robustness |
3521 } | |
3522 | |
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3523 // make the ConstantPool* safe to return |
0 | 3524 _prev_constant_pool_handle = constantPoolHandle(cp); |
3525 | |
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3526 GrowableArray<Method*>* method_refs = pv_node->prev_EMCP_methods(); |
0 | 3527 if (method_refs == NULL) { |
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3528 // the InstanceKlass did not have any EMCP methods |
0 | 3529 return; |
3530 } | |
3531 | |
3532 _prev_EMCP_method_handles = new GrowableArray<methodHandle>(10); | |
3533 | |
3534 int n_methods = method_refs->length(); | |
3535 for (int i = 0; i < n_methods; i++) { | |
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3536 Method* method = method_refs->at(i); |
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3537 assert (method != NULL, "method has been cleared"); |
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3538 if (method == NULL) { |
0 | 3539 continue; // robustness |
3540 } | |
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3541 // make the Method* safe to return |
0 | 3542 _prev_EMCP_method_handles->append(methodHandle(method)); |
3543 } | |
3544 } | |
3545 | |
3546 | |
3547 // Destroy a PreviousVersionInfo | |
3548 PreviousVersionInfo::~PreviousVersionInfo() { | |
3549 // Since _prev_EMCP_method_handles is not C-heap allocated, we | |
3550 // don't have to delete it. | |
3551 } | |
3552 | |
3553 | |
3554 // Construct a helper for walking the previous versions array | |
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|
3555 PreviousVersionWalker::PreviousVersionWalker(InstanceKlass *ik) { |
0 | 3556 _previous_versions = ik->previous_versions(); |
3557 _current_index = 0; | |
3558 // _hm needs no initialization | |
3559 _current_p = NULL; | |
3560 } | |
3561 | |
3562 | |
3563 // Destroy a PreviousVersionWalker | |
3564 PreviousVersionWalker::~PreviousVersionWalker() { | |
3565 // Delete the current info just in case the caller didn't walk to | |
3566 // the end of the previous versions list. No harm if _current_p is | |
3567 // already NULL. | |
3568 delete _current_p; | |
3569 | |
3570 // When _hm is destroyed, all the Handles returned in | |
3571 // PreviousVersionInfo objects will be destroyed. | |
3572 // Also, after this destructor is finished it will be | |
3573 // safe to delete the GrowableArray allocated in the | |
3574 // PreviousVersionInfo objects. | |
3575 } | |
3576 | |
3577 | |
3578 // Return the interesting information for the next previous version | |
3579 // of the klass. Returns NULL if there are no more previous versions. | |
3580 PreviousVersionInfo* PreviousVersionWalker::next_previous_version() { | |
3581 if (_previous_versions == NULL) { | |
3582 // no previous versions so nothing to return | |
3583 return NULL; | |
3584 } | |
3585 | |
3586 delete _current_p; // cleanup the previous info for the caller | |
3587 _current_p = NULL; // reset to NULL so we don't delete same object twice | |
3588 | |
3589 int length = _previous_versions->length(); | |
3590 | |
3591 while (_current_index < length) { | |
3592 PreviousVersionNode * pv_node = _previous_versions->at(_current_index++); | |
6197 | 3593 PreviousVersionInfo * pv_info = new (ResourceObj::C_HEAP, mtClass) |
0 | 3594 PreviousVersionInfo(pv_node); |
3595 | |
3596 constantPoolHandle cp_h = pv_info->prev_constant_pool_handle(); | |
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3597 assert (!cp_h.is_null(), "null cp found in previous version"); |
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3598 |
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3599 // The caller will need to delete pv_info when they are done with it. |
0 | 3600 _current_p = pv_info; |
3601 return pv_info; | |
3602 } | |
3603 | |
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3604 // all of the underlying nodes' info has been deleted |
0 | 3605 return NULL; |
3606 } // end next_previous_version() |