Mercurial > hg > graal-jvmci-8
annotate src/share/vm/oops/instanceKlass.cpp @ 7180:f34d701e952e
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Reviewed-by: dholmes, rbackman, coleenp
| author | stefank |
|---|---|
| date | Tue, 27 Nov 2012 14:20:21 +0100 |
| parents | 80e866b1d053 |
| children | 291ffc492eb6 35431a769282 ecd24264898b |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "classfile/javaClasses.hpp" | |
| 27 #include "classfile/systemDictionary.hpp" | |
| 28 #include "classfile/verifier.hpp" | |
| 29 #include "classfile/vmSymbols.hpp" | |
| 30 #include "compiler/compileBroker.hpp" | |
| 31 #include "gc_implementation/shared/markSweep.inline.hpp" | |
| 32 #include "gc_interface/collectedHeap.inline.hpp" | |
| 33 #include "interpreter/oopMapCache.hpp" | |
| 34 #include "interpreter/rewriter.hpp" | |
| 35 #include "jvmtifiles/jvmti.h" | |
| 36 #include "memory/genOopClosures.inline.hpp" | |
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37 #include "memory/metadataFactory.hpp" |
| 1972 | 38 #include "memory/oopFactory.hpp" |
| 3938 | 39 #include "oops/fieldStreams.hpp" |
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40 #include "oops/instanceClassLoaderKlass.hpp" |
| 1972 | 41 #include "oops/instanceKlass.hpp" |
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42 #include "oops/instanceMirrorKlass.hpp" |
| 1972 | 43 #include "oops/instanceOop.hpp" |
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44 #include "oops/klass.inline.hpp" |
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45 #include "oops/method.hpp" |
| 1972 | 46 #include "oops/oop.inline.hpp" |
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47 #include "oops/symbol.hpp" |
| 1972 | 48 #include "prims/jvmtiExport.hpp" |
| 49 #include "prims/jvmtiRedefineClassesTrace.hpp" | |
| 50 #include "runtime/fieldDescriptor.hpp" | |
| 51 #include "runtime/handles.inline.hpp" | |
| 52 #include "runtime/javaCalls.hpp" | |
| 53 #include "runtime/mutexLocker.hpp" | |
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54 #include "runtime/thread.inline.hpp" |
| 1972 | 55 #include "services/threadService.hpp" |
| 56 #include "utilities/dtrace.hpp" | |
| 57 #ifndef SERIALGC | |
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58 #include "gc_implementation/concurrentMarkSweep/cmsOopClosures.inline.hpp" |
| 1972 | 59 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" |
| 60 #include "gc_implementation/g1/g1OopClosures.inline.hpp" | |
| 61 #include "gc_implementation/g1/g1RemSet.inline.hpp" | |
| 62 #include "gc_implementation/g1/heapRegionSeq.inline.hpp" | |
| 63 #include "gc_implementation/parNew/parOopClosures.inline.hpp" | |
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64 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.inline.hpp" |
| 1972 | 65 #include "gc_implementation/parallelScavenge/psPromotionManager.inline.hpp" |
| 66 #include "gc_implementation/parallelScavenge/psScavenge.inline.hpp" | |
| 67 #include "oops/oop.pcgc.inline.hpp" | |
| 68 #endif | |
| 69 #ifdef COMPILER1 | |
| 70 #include "c1/c1_Compiler.hpp" | |
| 71 #endif | |
| 0 | 72 |
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73 #ifdef DTRACE_ENABLED |
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74 |
| 4006 | 75 #ifndef USDT2 |
| 76 | |
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77 HS_DTRACE_PROBE_DECL4(hotspot, class__initialization__required, |
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78 char*, intptr_t, oop, intptr_t); |
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79 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__recursive, |
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80 char*, intptr_t, oop, intptr_t, int); |
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81 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__concurrent, |
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82 char*, intptr_t, oop, intptr_t, int); |
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83 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__erroneous, |
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84 char*, intptr_t, oop, intptr_t, int); |
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85 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__super__failed, |
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86 char*, intptr_t, oop, intptr_t, int); |
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87 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__clinit, |
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88 char*, intptr_t, oop, intptr_t, int); |
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89 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__error, |
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90 char*, intptr_t, oop, intptr_t, int); |
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91 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__end, |
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92 char*, intptr_t, oop, intptr_t, int); |
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93 |
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94 #define DTRACE_CLASSINIT_PROBE(type, clss, thread_type) \ |
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95 { \ |
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96 char* data = NULL; \ |
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97 int len = 0; \ |
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98 Symbol* name = (clss)->name(); \ |
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99 if (name != NULL) { \ |
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100 data = (char*)name->bytes(); \ |
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101 len = name->utf8_length(); \ |
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102 } \ |
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103 HS_DTRACE_PROBE4(hotspot, class__initialization__##type, \ |
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104 data, len, (clss)->class_loader(), thread_type); \ |
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105 } |
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106 |
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107 #define DTRACE_CLASSINIT_PROBE_WAIT(type, clss, thread_type, wait) \ |
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108 { \ |
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109 char* data = NULL; \ |
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110 int len = 0; \ |
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111 Symbol* name = (clss)->name(); \ |
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112 if (name != NULL) { \ |
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113 data = (char*)name->bytes(); \ |
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114 len = name->utf8_length(); \ |
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115 } \ |
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116 HS_DTRACE_PROBE5(hotspot, class__initialization__##type, \ |
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117 data, len, (clss)->class_loader(), thread_type, wait); \ |
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118 } |
| 4006 | 119 #else /* USDT2 */ |
| 120 | |
| 121 #define HOTSPOT_CLASS_INITIALIZATION_required HOTSPOT_CLASS_INITIALIZATION_REQUIRED | |
| 122 #define HOTSPOT_CLASS_INITIALIZATION_recursive HOTSPOT_CLASS_INITIALIZATION_RECURSIVE | |
| 123 #define HOTSPOT_CLASS_INITIALIZATION_concurrent HOTSPOT_CLASS_INITIALIZATION_CONCURRENT | |
| 124 #define HOTSPOT_CLASS_INITIALIZATION_erroneous HOTSPOT_CLASS_INITIALIZATION_ERRONEOUS | |
| 125 #define HOTSPOT_CLASS_INITIALIZATION_super__failed HOTSPOT_CLASS_INITIALIZATION_SUPER_FAILED | |
| 126 #define HOTSPOT_CLASS_INITIALIZATION_clinit HOTSPOT_CLASS_INITIALIZATION_CLINIT | |
| 127 #define HOTSPOT_CLASS_INITIALIZATION_error HOTSPOT_CLASS_INITIALIZATION_ERROR | |
| 128 #define HOTSPOT_CLASS_INITIALIZATION_end HOTSPOT_CLASS_INITIALIZATION_END | |
| 129 #define DTRACE_CLASSINIT_PROBE(type, clss, thread_type) \ | |
| 130 { \ | |
| 131 char* data = NULL; \ | |
| 132 int len = 0; \ | |
| 133 Symbol* name = (clss)->name(); \ | |
| 134 if (name != NULL) { \ | |
| 135 data = (char*)name->bytes(); \ | |
| 136 len = name->utf8_length(); \ | |
| 137 } \ | |
| 138 HOTSPOT_CLASS_INITIALIZATION_##type( \ | |
| 139 data, len, (clss)->class_loader(), thread_type); \ | |
| 140 } | |
| 141 | |
| 142 #define DTRACE_CLASSINIT_PROBE_WAIT(type, clss, thread_type, wait) \ | |
| 143 { \ | |
| 144 char* data = NULL; \ | |
| 145 int len = 0; \ | |
| 146 Symbol* name = (clss)->name(); \ | |
| 147 if (name != NULL) { \ | |
| 148 data = (char*)name->bytes(); \ | |
| 149 len = name->utf8_length(); \ | |
| 150 } \ | |
| 151 HOTSPOT_CLASS_INITIALIZATION_##type( \ | |
| 152 data, len, (clss)->class_loader(), thread_type, wait); \ | |
| 153 } | |
| 154 #endif /* USDT2 */ | |
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155 |
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156 #else // ndef DTRACE_ENABLED |
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157 |
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158 #define DTRACE_CLASSINIT_PROBE(type, clss, thread_type) |
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159 #define DTRACE_CLASSINIT_PROBE_WAIT(type, clss, thread_type, wait) |
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160 |
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161 #endif // ndef DTRACE_ENABLED |
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162 |
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163 Klass* InstanceKlass::allocate_instance_klass(ClassLoaderData* loader_data, |
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164 int vtable_len, |
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165 int itable_len, |
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166 int static_field_size, |
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167 int nonstatic_oop_map_size, |
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168 ReferenceType rt, |
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169 AccessFlags access_flags, |
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170 Symbol* name, |
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171 Klass* super_klass, |
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172 KlassHandle host_klass, |
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173 TRAPS) { |
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174 |
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175 int size = InstanceKlass::size(vtable_len, itable_len, nonstatic_oop_map_size, |
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176 access_flags.is_interface(), |
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177 !host_klass.is_null()); |
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178 |
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179 // Allocation |
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180 InstanceKlass* ik; |
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181 if (rt == REF_NONE) { |
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182 if (name == vmSymbols::java_lang_Class()) { |
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183 ik = new (loader_data, size, THREAD) InstanceMirrorKlass( |
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184 vtable_len, itable_len, static_field_size, nonstatic_oop_map_size, rt, |
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185 access_flags, !host_klass.is_null()); |
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186 } else if (name == vmSymbols::java_lang_ClassLoader() || |
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187 (SystemDictionary::ClassLoader_klass_loaded() && |
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188 super_klass != NULL && |
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189 super_klass->is_subtype_of(SystemDictionary::ClassLoader_klass()))) { |
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190 ik = new (loader_data, size, THREAD) InstanceClassLoaderKlass( |
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191 vtable_len, itable_len, static_field_size, nonstatic_oop_map_size, rt, |
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192 access_flags, !host_klass.is_null()); |
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193 } else { |
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194 // normal class |
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195 ik = new (loader_data, size, THREAD) InstanceKlass( |
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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 } |
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199 } else { |
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200 // reference klass |
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201 ik = new (loader_data, size, THREAD) InstanceRefKlass( |
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202 vtable_len, itable_len, static_field_size, nonstatic_oop_map_size, rt, |
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203 access_flags, !host_klass.is_null()); |
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204 } |
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205 |
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206 return ik; |
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207 } |
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208 |
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209 InstanceKlass::InstanceKlass(int vtable_len, |
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210 int itable_len, |
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211 int static_field_size, |
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212 int nonstatic_oop_map_size, |
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213 ReferenceType rt, |
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214 AccessFlags access_flags, |
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215 bool is_anonymous) { |
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216 No_Safepoint_Verifier no_safepoint; // until k becomes parsable |
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217 |
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218 int size = InstanceKlass::size(vtable_len, itable_len, nonstatic_oop_map_size, |
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219 access_flags.is_interface(), is_anonymous); |
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220 |
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221 // The sizes of these these three variables are used for determining the |
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222 // size of the instanceKlassOop. It is critical that these are set to the right |
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223 // sizes before the first GC, i.e., when we allocate the mirror. |
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224 this->set_vtable_length(vtable_len); |
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225 this->set_itable_length(itable_len); |
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226 this->set_static_field_size(static_field_size); |
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227 this->set_nonstatic_oop_map_size(nonstatic_oop_map_size); |
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228 this->set_access_flags(access_flags); |
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229 this->set_is_anonymous(is_anonymous); |
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230 assert(this->size() == size, "wrong size for object"); |
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231 |
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232 this->set_array_klasses(NULL); |
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233 this->set_methods(NULL); |
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234 this->set_method_ordering(NULL); |
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235 this->set_local_interfaces(NULL); |
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236 this->set_transitive_interfaces(NULL); |
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237 this->init_implementor(); |
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238 this->set_fields(NULL, 0); |
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239 this->set_constants(NULL); |
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240 this->set_class_loader_data(NULL); |
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241 this->set_protection_domain(NULL); |
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242 this->set_signers(NULL); |
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243 this->set_source_file_name(NULL); |
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244 this->set_source_debug_extension(NULL, 0); |
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245 this->set_array_name(NULL); |
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246 this->set_inner_classes(NULL); |
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247 this->set_static_oop_field_count(0); |
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248 this->set_nonstatic_field_size(0); |
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249 this->set_is_marked_dependent(false); |
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250 this->set_init_state(InstanceKlass::allocated); |
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251 this->set_init_thread(NULL); |
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252 this->set_init_lock(NULL); |
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253 this->set_reference_type(rt); |
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254 this->set_oop_map_cache(NULL); |
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255 this->set_jni_ids(NULL); |
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256 this->set_osr_nmethods_head(NULL); |
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257 this->set_breakpoints(NULL); |
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258 this->init_previous_versions(); |
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259 this->set_generic_signature(NULL); |
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260 this->release_set_methods_jmethod_ids(NULL); |
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261 this->release_set_methods_cached_itable_indices(NULL); |
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262 this->set_annotations(NULL); |
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263 this->set_jvmti_cached_class_field_map(NULL); |
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264 this->set_initial_method_idnum(0); |
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265 |
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266 // initialize the non-header words to zero |
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267 intptr_t* p = (intptr_t*)this; |
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268 for (int index = InstanceKlass::header_size(); index < size; index++) { |
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269 p[index] = NULL_WORD; |
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270 } |
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271 |
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272 // Set temporary value until parseClassFile updates it with the real instance |
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273 // size. |
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274 this->set_layout_helper(Klass::instance_layout_helper(0, true)); |
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275 } |
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276 |
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277 |
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278 // This function deallocates the metadata and C heap pointers that the |
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279 // InstanceKlass points to. |
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280 void InstanceKlass::deallocate_contents(ClassLoaderData* loader_data) { |
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281 |
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282 // Orphan the mirror first, CMS thinks it's still live. |
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283 java_lang_Class::set_klass(java_mirror(), NULL); |
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284 |
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285 // Need to take this class off the class loader data list. |
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286 loader_data->remove_class(this); |
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287 |
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288 // The array_klass for this class is created later, after error handling. |
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289 // For class redefinition, we keep the original class so this scratch class |
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290 // doesn't have an array class. Either way, assert that there is nothing |
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291 // to deallocate. |
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292 assert(array_klasses() == NULL, "array classes shouldn't be created for this class yet"); |
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293 |
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294 // Release C heap allocated data that this might point to, which includes |
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295 // reference counting symbol names. |
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296 release_C_heap_structures(); |
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297 |
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298 Array<Method*>* ms = methods(); |
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299 if (ms != Universe::the_empty_method_array()) { |
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300 for (int i = 0; i <= methods()->length() -1 ; i++) { |
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301 Method* method = methods()->at(i); |
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302 // Only want to delete methods that are not executing for RedefineClasses. |
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303 // The previous version will point to them so they're not totally dangling |
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304 assert (!method->on_stack(), "shouldn't be called with methods on stack"); |
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305 MetadataFactory::free_metadata(loader_data, method); |
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306 } |
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307 MetadataFactory::free_array<Method*>(loader_data, methods()); |
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308 } |
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309 set_methods(NULL); |
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310 |
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311 if (method_ordering() != Universe::the_empty_int_array()) { |
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312 MetadataFactory::free_array<int>(loader_data, method_ordering()); |
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313 } |
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314 set_method_ordering(NULL); |
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315 |
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316 // This array is in Klass, but remove it with the InstanceKlass since |
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317 // this place would be the only caller and it can share memory with transitive |
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318 // interfaces. |
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319 if (secondary_supers() != Universe::the_empty_klass_array() && |
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320 secondary_supers() != transitive_interfaces()) { |
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321 MetadataFactory::free_array<Klass*>(loader_data, secondary_supers()); |
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322 } |
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323 set_secondary_supers(NULL); |
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324 |
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325 // Only deallocate transitive interfaces if not empty, same as super class |
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326 // or same as local interfaces. See code in parseClassFile. |
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327 Array<Klass*>* ti = transitive_interfaces(); |
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328 if (ti != Universe::the_empty_klass_array() && ti != local_interfaces()) { |
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329 // check that the interfaces don't come from super class |
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330 Array<Klass*>* sti = (super() == NULL) ? NULL : |
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331 InstanceKlass::cast(super())->transitive_interfaces(); |
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332 if (ti != sti) { |
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333 MetadataFactory::free_array<Klass*>(loader_data, ti); |
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334 } |
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335 } |
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336 set_transitive_interfaces(NULL); |
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337 |
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338 // local interfaces can be empty |
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339 Array<Klass*>* li = local_interfaces(); |
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340 if (li != Universe::the_empty_klass_array()) { |
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341 MetadataFactory::free_array<Klass*>(loader_data, li); |
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342 } |
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343 set_local_interfaces(NULL); |
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344 |
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345 MetadataFactory::free_array<jushort>(loader_data, fields()); |
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346 set_fields(NULL, 0); |
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347 |
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348 // If a method from a redefined class is using this constant pool, don't |
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349 // delete it, yet. The new class's previous version will point to this. |
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350 assert (!constants()->on_stack(), "shouldn't be called if anything is onstack"); |
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351 MetadataFactory::free_metadata(loader_data, constants()); |
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352 set_constants(NULL); |
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353 |
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354 if (inner_classes() != Universe::the_empty_short_array()) { |
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355 MetadataFactory::free_array<jushort>(loader_data, inner_classes()); |
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356 } |
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357 set_inner_classes(NULL); |
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358 |
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359 // Null out Java heap objects, although these won't be walked to keep |
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360 // alive once this InstanceKlass is deallocated. |
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361 set_protection_domain(NULL); |
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362 set_signers(NULL); |
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363 set_init_lock(NULL); |
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364 set_annotations(NULL); |
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365 } |
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366 |
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367 volatile oop InstanceKlass::init_lock() const { |
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368 volatile oop lock = _init_lock; // read once |
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369 assert((oop)lock != NULL || !is_not_initialized(), // initialized or in_error state |
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370 "only fully initialized state can have a null lock"); |
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371 return lock; |
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372 } |
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373 |
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374 // Set the initialization lock to null so the object can be GC'ed. Any racing |
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375 // threads to get this lock will see a null lock and will not lock. |
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376 // That's okay because they all check for initialized state after getting |
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377 // the lock and return. |
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378 void InstanceKlass::fence_and_clear_init_lock() { |
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379 // make sure previous stores are all done, notably the init_state. |
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380 OrderAccess::storestore(); |
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381 klass_oop_store(&_init_lock, NULL); |
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382 assert(!is_not_initialized(), "class must be initialized now"); |
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383 } |
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384 |
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385 |
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386 bool InstanceKlass::should_be_initialized() const { |
| 0 | 387 return !is_initialized(); |
| 388 } | |
| 389 | |
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390 klassVtable* InstanceKlass::vtable() const { |
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391 return new klassVtable(this, start_of_vtable(), vtable_length() / vtableEntry::size()); |
| 0 | 392 } |
| 393 | |
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394 klassItable* InstanceKlass::itable() const { |
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395 return new klassItable(instanceKlassHandle(this)); |
| 0 | 396 } |
| 397 | |
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398 void InstanceKlass::eager_initialize(Thread *thread) { |
| 0 | 399 if (!EagerInitialization) return; |
| 400 | |
| 401 if (this->is_not_initialized()) { | |
| 402 // abort if the the class has a class initializer | |
| 403 if (this->class_initializer() != NULL) return; | |
| 404 | |
| 405 // abort if it is java.lang.Object (initialization is handled in genesis) | |
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406 Klass* super = this->super(); |
| 0 | 407 if (super == NULL) return; |
| 408 | |
| 409 // abort if the super class should be initialized | |
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410 if (!InstanceKlass::cast(super)->is_initialized()) return; |
| 0 | 411 |
| 412 // call body to expose the this pointer | |
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413 instanceKlassHandle this_oop(thread, this); |
| 0 | 414 eager_initialize_impl(this_oop); |
| 415 } | |
| 416 } | |
| 417 | |
| 418 | |
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419 void InstanceKlass::eager_initialize_impl(instanceKlassHandle this_oop) { |
| 0 | 420 EXCEPTION_MARK; |
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421 volatile oop init_lock = this_oop->init_lock(); |
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422 ObjectLocker ol(init_lock, THREAD, init_lock != NULL); |
| 0 | 423 |
| 424 // abort if someone beat us to the initialization | |
| 425 if (!this_oop->is_not_initialized()) return; // note: not equivalent to is_initialized() | |
| 426 | |
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427 ClassState old_state = this_oop->init_state(); |
| 0 | 428 link_class_impl(this_oop, true, THREAD); |
| 429 if (HAS_PENDING_EXCEPTION) { | |
| 430 CLEAR_PENDING_EXCEPTION; | |
| 431 // Abort if linking the class throws an exception. | |
| 432 | |
| 433 // Use a test to avoid redundantly resetting the state if there's | |
| 434 // no change. Set_init_state() asserts that state changes make | |
| 435 // progress, whereas here we might just be spinning in place. | |
| 436 if( old_state != this_oop->_init_state ) | |
| 437 this_oop->set_init_state (old_state); | |
| 438 } else { | |
| 439 // linking successfull, mark class as initialized | |
| 440 this_oop->set_init_state (fully_initialized); | |
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441 this_oop->fence_and_clear_init_lock(); |
| 0 | 442 // trace |
| 443 if (TraceClassInitialization) { | |
| 444 ResourceMark rm(THREAD); | |
| 445 tty->print_cr("[Initialized %s without side effects]", this_oop->external_name()); | |
| 446 } | |
| 447 } | |
| 448 } | |
| 449 | |
| 450 | |
| 451 // See "The Virtual Machine Specification" section 2.16.5 for a detailed explanation of the class initialization | |
| 452 // process. The step comments refers to the procedure described in that section. | |
| 453 // Note: implementation moved to static method to expose the this pointer. | |
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454 void InstanceKlass::initialize(TRAPS) { |
| 0 | 455 if (this->should_be_initialized()) { |
| 456 HandleMark hm(THREAD); | |
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457 instanceKlassHandle this_oop(THREAD, this); |
| 0 | 458 initialize_impl(this_oop, CHECK); |
| 459 // Note: at this point the class may be initialized | |
| 460 // OR it may be in the state of being initialized | |
| 461 // in case of recursive initialization! | |
| 462 } else { | |
| 463 assert(is_initialized(), "sanity check"); | |
| 464 } | |
| 465 } | |
| 466 | |
| 467 | |
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468 bool InstanceKlass::verify_code( |
| 0 | 469 instanceKlassHandle this_oop, bool throw_verifyerror, TRAPS) { |
| 470 // 1) Verify the bytecodes | |
| 471 Verifier::Mode mode = | |
| 472 throw_verifyerror ? Verifier::ThrowException : Verifier::NoException; | |
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473 return Verifier::verify(this_oop, mode, this_oop->should_verify_class(), CHECK_false); |
| 0 | 474 } |
| 475 | |
| 476 | |
| 477 // Used exclusively by the shared spaces dump mechanism to prevent | |
| 478 // classes mapped into the shared regions in new VMs from appearing linked. | |
| 479 | |
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480 void InstanceKlass::unlink_class() { |
| 0 | 481 assert(is_linked(), "must be linked"); |
| 482 _init_state = loaded; | |
| 483 } | |
| 484 | |
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485 void InstanceKlass::link_class(TRAPS) { |
| 0 | 486 assert(is_loaded(), "must be loaded"); |
| 487 if (!is_linked()) { | |
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488 HandleMark hm(THREAD); |
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489 instanceKlassHandle this_oop(THREAD, this); |
| 0 | 490 link_class_impl(this_oop, true, CHECK); |
| 491 } | |
| 492 } | |
| 493 | |
| 494 // Called to verify that a class can link during initialization, without | |
| 495 // throwing a VerifyError. | |
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496 bool InstanceKlass::link_class_or_fail(TRAPS) { |
| 0 | 497 assert(is_loaded(), "must be loaded"); |
| 498 if (!is_linked()) { | |
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499 HandleMark hm(THREAD); |
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500 instanceKlassHandle this_oop(THREAD, this); |
| 0 | 501 link_class_impl(this_oop, false, CHECK_false); |
| 502 } | |
| 503 return is_linked(); | |
| 504 } | |
| 505 | |
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506 bool InstanceKlass::link_class_impl( |
| 0 | 507 instanceKlassHandle this_oop, bool throw_verifyerror, TRAPS) { |
| 508 // check for error state | |
| 509 if (this_oop->is_in_error_state()) { | |
| 510 ResourceMark rm(THREAD); | |
| 511 THROW_MSG_(vmSymbols::java_lang_NoClassDefFoundError(), | |
| 512 this_oop->external_name(), false); | |
| 513 } | |
| 514 // return if already verified | |
| 515 if (this_oop->is_linked()) { | |
| 516 return true; | |
| 517 } | |
| 518 | |
| 519 // Timing | |
| 520 // timer handles recursion | |
| 521 assert(THREAD->is_Java_thread(), "non-JavaThread in link_class_impl"); | |
| 522 JavaThread* jt = (JavaThread*)THREAD; | |
| 523 | |
| 524 // link super class before linking this class | |
| 525 instanceKlassHandle super(THREAD, this_oop->super()); | |
| 526 if (super.not_null()) { | |
| 527 if (super->is_interface()) { // check if super class is an interface | |
| 528 ResourceMark rm(THREAD); | |
| 529 Exceptions::fthrow( | |
| 530 THREAD_AND_LOCATION, | |
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531 vmSymbols::java_lang_IncompatibleClassChangeError(), |
| 0 | 532 "class %s has interface %s as super class", |
| 533 this_oop->external_name(), | |
| 534 super->external_name() | |
| 535 ); | |
| 536 return false; | |
| 537 } | |
| 538 | |
| 539 link_class_impl(super, throw_verifyerror, CHECK_false); | |
| 540 } | |
| 541 | |
| 542 // link all interfaces implemented by this class before linking this class | |
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543 Array<Klass*>* interfaces = this_oop->local_interfaces(); |
| 0 | 544 int num_interfaces = interfaces->length(); |
| 545 for (int index = 0; index < num_interfaces; index++) { | |
| 546 HandleMark hm(THREAD); | |
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547 instanceKlassHandle ih(THREAD, interfaces->at(index)); |
| 0 | 548 link_class_impl(ih, throw_verifyerror, CHECK_false); |
| 549 } | |
| 550 | |
| 551 // in case the class is linked in the process of linking its superclasses | |
| 552 if (this_oop->is_linked()) { | |
| 553 return true; | |
| 554 } | |
| 555 | |
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556 // trace only the link time for this klass that includes |
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557 // the verification time |
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558 PerfClassTraceTime vmtimer(ClassLoader::perf_class_link_time(), |
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559 ClassLoader::perf_class_link_selftime(), |
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560 ClassLoader::perf_classes_linked(), |
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561 jt->get_thread_stat()->perf_recursion_counts_addr(), |
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562 jt->get_thread_stat()->perf_timers_addr(), |
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563 PerfClassTraceTime::CLASS_LINK); |
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564 |
| 0 | 565 // verification & rewriting |
| 566 { | |
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567 volatile oop init_lock = this_oop->init_lock(); |
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568 ObjectLocker ol(init_lock, THREAD, init_lock != NULL); |
| 0 | 569 // rewritten will have been set if loader constraint error found |
| 570 // on an earlier link attempt | |
| 571 // don't verify or rewrite if already rewritten | |
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572 |
| 0 | 573 if (!this_oop->is_linked()) { |
| 574 if (!this_oop->is_rewritten()) { | |
| 575 { | |
| 576 // Timer includes any side effects of class verification (resolution, | |
| 577 // etc), but not recursive entry into verify_code(). | |
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578 PerfClassTraceTime timer(ClassLoader::perf_class_verify_time(), |
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579 ClassLoader::perf_class_verify_selftime(), |
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580 ClassLoader::perf_classes_verified(), |
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581 jt->get_thread_stat()->perf_recursion_counts_addr(), |
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582 jt->get_thread_stat()->perf_timers_addr(), |
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583 PerfClassTraceTime::CLASS_VERIFY); |
| 0 | 584 bool verify_ok = verify_code(this_oop, throw_verifyerror, THREAD); |
| 585 if (!verify_ok) { | |
| 586 return false; | |
| 587 } | |
| 588 } | |
| 589 | |
| 590 // Just in case a side-effect of verify linked this class already | |
| 591 // (which can sometimes happen since the verifier loads classes | |
| 592 // using custom class loaders, which are free to initialize things) | |
| 593 if (this_oop->is_linked()) { | |
| 594 return true; | |
| 595 } | |
| 596 | |
| 597 // also sets rewritten | |
| 598 this_oop->rewrite_class(CHECK_false); | |
| 599 } | |
| 600 | |
| 3748 | 601 // relocate jsrs and link methods after they are all rewritten |
| 602 this_oop->relocate_and_link_methods(CHECK_false); | |
| 603 | |
| 0 | 604 // Initialize the vtable and interface table after |
| 605 // methods have been rewritten since rewrite may | |
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606 // fabricate new Method*s. |
| 0 | 607 // also does loader constraint checking |
| 608 if (!this_oop()->is_shared()) { | |
| 609 ResourceMark rm(THREAD); | |
| 610 this_oop->vtable()->initialize_vtable(true, CHECK_false); | |
| 611 this_oop->itable()->initialize_itable(true, CHECK_false); | |
| 612 } | |
| 613 #ifdef ASSERT | |
| 614 else { | |
| 615 ResourceMark rm(THREAD); | |
| 616 this_oop->vtable()->verify(tty, true); | |
| 617 // In case itable verification is ever added. | |
| 618 // this_oop->itable()->verify(tty, true); | |
| 619 } | |
| 620 #endif | |
| 621 this_oop->set_init_state(linked); | |
| 622 if (JvmtiExport::should_post_class_prepare()) { | |
| 623 Thread *thread = THREAD; | |
| 624 assert(thread->is_Java_thread(), "thread->is_Java_thread()"); | |
| 625 JvmtiExport::post_class_prepare((JavaThread *) thread, this_oop()); | |
| 626 } | |
| 627 } | |
| 628 } | |
| 629 return true; | |
| 630 } | |
| 631 | |
| 632 | |
| 633 // Rewrite the byte codes of all of the methods of a class. | |
| 634 // The rewriter must be called exactly once. Rewriting must happen after | |
| 635 // verification but before the first method of the class is executed. | |
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636 void InstanceKlass::rewrite_class(TRAPS) { |
| 0 | 637 assert(is_loaded(), "must be loaded"); |
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638 instanceKlassHandle this_oop(THREAD, this); |
| 0 | 639 if (this_oop->is_rewritten()) { |
| 640 assert(this_oop()->is_shared(), "rewriting an unshared class?"); | |
| 641 return; | |
| 642 } | |
| 3748 | 643 Rewriter::rewrite(this_oop, CHECK); |
| 0 | 644 this_oop->set_rewritten(); |
| 645 } | |
| 646 | |
| 3748 | 647 // Now relocate and link method entry points after class is rewritten. |
| 648 // This is outside is_rewritten flag. In case of an exception, it can be | |
| 649 // executed more than once. | |
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650 void InstanceKlass::relocate_and_link_methods(TRAPS) { |
| 3748 | 651 assert(is_loaded(), "must be loaded"); |
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652 instanceKlassHandle this_oop(THREAD, this); |
| 3748 | 653 Rewriter::relocate_and_link(this_oop, CHECK); |
| 654 } | |
| 655 | |
| 0 | 656 |
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657 void InstanceKlass::initialize_impl(instanceKlassHandle this_oop, TRAPS) { |
| 0 | 658 // Make sure klass is linked (verified) before initialization |
| 659 // A class could already be verified, since it has been reflected upon. | |
| 660 this_oop->link_class(CHECK); | |
| 661 | |
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662 DTRACE_CLASSINIT_PROBE(required, InstanceKlass::cast(this_oop()), -1); |
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663 |
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664 bool wait = false; |
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665 |
| 0 | 666 // refer to the JVM book page 47 for description of steps |
| 667 // Step 1 | |
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668 { |
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669 volatile oop init_lock = this_oop->init_lock(); |
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670 ObjectLocker ol(init_lock, THREAD, init_lock != NULL); |
| 0 | 671 |
| 672 Thread *self = THREAD; // it's passed the current thread | |
| 673 | |
| 674 // Step 2 | |
| 675 // If we were to use wait() instead of waitInterruptibly() then | |
| 676 // we might end up throwing IE from link/symbol resolution sites | |
| 677 // that aren't expected to throw. This would wreak havoc. See 6320309. | |
| 678 while(this_oop->is_being_initialized() && !this_oop->is_reentrant_initialization(self)) { | |
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679 wait = true; |
| 0 | 680 ol.waitUninterruptibly(CHECK); |
| 681 } | |
| 682 | |
| 683 // Step 3 | |
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684 if (this_oop->is_being_initialized() && this_oop->is_reentrant_initialization(self)) { |
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685 DTRACE_CLASSINIT_PROBE_WAIT(recursive, InstanceKlass::cast(this_oop()), -1,wait); |
| 0 | 686 return; |
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687 } |
| 0 | 688 |
| 689 // Step 4 | |
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690 if (this_oop->is_initialized()) { |
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691 DTRACE_CLASSINIT_PROBE_WAIT(concurrent, InstanceKlass::cast(this_oop()), -1,wait); |
| 0 | 692 return; |
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693 } |
| 0 | 694 |
| 695 // Step 5 | |
| 696 if (this_oop->is_in_error_state()) { | |
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697 DTRACE_CLASSINIT_PROBE_WAIT(erroneous, InstanceKlass::cast(this_oop()), -1,wait); |
| 0 | 698 ResourceMark rm(THREAD); |
| 699 const char* desc = "Could not initialize class "; | |
| 700 const char* className = this_oop->external_name(); | |
| 701 size_t msglen = strlen(desc) + strlen(className) + 1; | |
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702 char* message = NEW_RESOURCE_ARRAY(char, msglen); |
| 0 | 703 if (NULL == message) { |
| 704 // Out of memory: can't create detailed error message | |
| 705 THROW_MSG(vmSymbols::java_lang_NoClassDefFoundError(), className); | |
| 706 } else { | |
| 707 jio_snprintf(message, msglen, "%s%s", desc, className); | |
| 708 THROW_MSG(vmSymbols::java_lang_NoClassDefFoundError(), message); | |
| 709 } | |
| 710 } | |
| 711 | |
| 712 // Step 6 | |
| 713 this_oop->set_init_state(being_initialized); | |
| 714 this_oop->set_init_thread(self); | |
| 715 } | |
| 716 | |
| 717 // Step 7 | |
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718 Klass* super_klass = this_oop->super(); |
| 6983 | 719 if (super_klass != NULL && !this_oop->is_interface() && super_klass->should_be_initialized()) { |
| 720 super_klass->initialize(THREAD); | |
| 0 | 721 |
| 722 if (HAS_PENDING_EXCEPTION) { | |
| 723 Handle e(THREAD, PENDING_EXCEPTION); | |
| 724 CLEAR_PENDING_EXCEPTION; | |
| 725 { | |
| 726 EXCEPTION_MARK; | |
| 727 this_oop->set_initialization_state_and_notify(initialization_error, THREAD); // Locks object, set state, and notify all waiting threads | |
| 728 CLEAR_PENDING_EXCEPTION; // ignore any exception thrown, superclass initialization error is thrown below | |
| 729 } | |
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730 DTRACE_CLASSINIT_PROBE_WAIT(super__failed, InstanceKlass::cast(this_oop()), -1,wait); |
| 0 | 731 THROW_OOP(e()); |
| 732 } | |
| 733 } | |
| 734 | |
| 6934 | 735 if (this_oop->has_default_methods()) { |
| 736 // Step 7.5: initialize any interfaces which have default methods | |
| 737 for (int i = 0; i < this_oop->local_interfaces()->length(); ++i) { | |
| 738 Klass* iface = this_oop->local_interfaces()->at(i); | |
| 739 InstanceKlass* ik = InstanceKlass::cast(iface); | |
| 740 if (ik->has_default_methods() && ik->should_be_initialized()) { | |
| 741 ik->initialize(THREAD); | |
| 742 | |
| 743 if (HAS_PENDING_EXCEPTION) { | |
| 744 Handle e(THREAD, PENDING_EXCEPTION); | |
| 745 CLEAR_PENDING_EXCEPTION; | |
| 746 { | |
| 747 EXCEPTION_MARK; | |
| 748 // Locks object, set state, and notify all waiting threads | |
| 749 this_oop->set_initialization_state_and_notify( | |
| 750 initialization_error, THREAD); | |
| 751 | |
| 752 // ignore any exception thrown, superclass initialization error is | |
| 753 // thrown below | |
| 754 CLEAR_PENDING_EXCEPTION; | |
| 755 } | |
| 756 DTRACE_CLASSINIT_PROBE_WAIT( | |
| 757 super__failed, InstanceKlass::cast(this_oop()), -1, wait); | |
| 758 THROW_OOP(e()); | |
| 759 } | |
| 760 } | |
| 761 } | |
| 762 } | |
| 763 | |
| 0 | 764 // Step 8 |
| 765 { | |
| 766 assert(THREAD->is_Java_thread(), "non-JavaThread in initialize_impl"); | |
| 767 JavaThread* jt = (JavaThread*)THREAD; | |
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768 DTRACE_CLASSINIT_PROBE_WAIT(clinit, InstanceKlass::cast(this_oop()), -1,wait); |
| 0 | 769 // Timer includes any side effects of class initialization (resolution, |
| 770 // etc), but not recursive entry into call_class_initializer(). | |
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771 PerfClassTraceTime timer(ClassLoader::perf_class_init_time(), |
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772 ClassLoader::perf_class_init_selftime(), |
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773 ClassLoader::perf_classes_inited(), |
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774 jt->get_thread_stat()->perf_recursion_counts_addr(), |
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775 jt->get_thread_stat()->perf_timers_addr(), |
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776 PerfClassTraceTime::CLASS_CLINIT); |
| 0 | 777 this_oop->call_class_initializer(THREAD); |
| 778 } | |
| 779 | |
| 780 // Step 9 | |
| 781 if (!HAS_PENDING_EXCEPTION) { | |
| 782 this_oop->set_initialization_state_and_notify(fully_initialized, CHECK); | |
| 783 { ResourceMark rm(THREAD); | |
| 784 debug_only(this_oop->vtable()->verify(tty, true);) | |
| 785 } | |
| 786 } | |
| 787 else { | |
| 788 // Step 10 and 11 | |
| 789 Handle e(THREAD, PENDING_EXCEPTION); | |
| 790 CLEAR_PENDING_EXCEPTION; | |
| 791 { | |
| 792 EXCEPTION_MARK; | |
| 793 this_oop->set_initialization_state_and_notify(initialization_error, THREAD); | |
| 794 CLEAR_PENDING_EXCEPTION; // ignore any exception thrown, class initialization error is thrown below | |
| 795 } | |
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796 DTRACE_CLASSINIT_PROBE_WAIT(error, InstanceKlass::cast(this_oop()), -1,wait); |
| 1142 | 797 if (e->is_a(SystemDictionary::Error_klass())) { |
| 0 | 798 THROW_OOP(e()); |
| 799 } else { | |
| 800 JavaCallArguments args(e); | |
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801 THROW_ARG(vmSymbols::java_lang_ExceptionInInitializerError(), |
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802 vmSymbols::throwable_void_signature(), |
| 0 | 803 &args); |
| 804 } | |
| 805 } | |
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806 DTRACE_CLASSINIT_PROBE_WAIT(end, InstanceKlass::cast(this_oop()), -1,wait); |
| 0 | 807 } |
| 808 | |
| 809 | |
| 810 // Note: implementation moved to static method to expose the this pointer. | |
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811 void InstanceKlass::set_initialization_state_and_notify(ClassState state, TRAPS) { |
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812 instanceKlassHandle kh(THREAD, this); |
| 0 | 813 set_initialization_state_and_notify_impl(kh, state, CHECK); |
| 814 } | |
| 815 | |
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816 void InstanceKlass::set_initialization_state_and_notify_impl(instanceKlassHandle this_oop, ClassState state, TRAPS) { |
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817 volatile oop init_lock = this_oop->init_lock(); |
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818 ObjectLocker ol(init_lock, THREAD, init_lock != NULL); |
| 0 | 819 this_oop->set_init_state(state); |
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820 this_oop->fence_and_clear_init_lock(); |
| 0 | 821 ol.notify_all(CHECK); |
| 822 } | |
| 823 | |
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824 // The embedded _implementor field can only record one implementor. |
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825 // When there are more than one implementors, the _implementor field |
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826 // is set to the interface Klass* itself. Following are the possible |
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827 // values for the _implementor field: |
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828 // NULL - no implementor |
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829 // implementor Klass* - one implementor |
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830 // self - more than one implementor |
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831 // |
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832 // The _implementor field only exists for interfaces. |
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833 void InstanceKlass::add_implementor(Klass* k) { |
| 0 | 834 assert(Compile_lock->owned_by_self(), ""); |
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835 assert(is_interface(), "not interface"); |
| 0 | 836 // Filter out my subinterfaces. |
| 837 // (Note: Interfaces are never on the subklass list.) | |
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838 if (InstanceKlass::cast(k)->is_interface()) return; |
| 0 | 839 |
| 840 // Filter out subclasses whose supers already implement me. | |
| 841 // (Note: CHA must walk subclasses of direct implementors | |
| 842 // in order to locate indirect implementors.) | |
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843 Klass* sk = InstanceKlass::cast(k)->super(); |
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844 if (sk != NULL && InstanceKlass::cast(sk)->implements_interface(this)) |
| 0 | 845 // We only need to check one immediate superclass, since the |
| 846 // implements_interface query looks at transitive_interfaces. | |
| 847 // Any supers of the super have the same (or fewer) transitive_interfaces. | |
| 848 return; | |
| 849 | |
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850 Klass* ik = implementor(); |
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851 if (ik == NULL) { |
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852 set_implementor(k); |
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853 } else if (ik != this) { |
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854 // There is already an implementor. Use itself as an indicator of |
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855 // more than one implementors. |
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856 set_implementor(this); |
| 0 | 857 } |
| 858 | |
| 859 // The implementor also implements the transitive_interfaces | |
| 860 for (int index = 0; index < local_interfaces()->length(); index++) { | |
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861 InstanceKlass::cast(local_interfaces()->at(index))->add_implementor(k); |
| 0 | 862 } |
| 863 } | |
| 864 | |
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865 void InstanceKlass::init_implementor() { |
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866 if (is_interface()) { |
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867 set_implementor(NULL); |
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868 } |
| 0 | 869 } |
| 870 | |
| 871 | |
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872 void InstanceKlass::process_interfaces(Thread *thread) { |
| 0 | 873 // link this class into the implementors list of every interface it implements |
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874 Klass* this_as_klass_oop = this; |
| 0 | 875 for (int i = local_interfaces()->length() - 1; i >= 0; i--) { |
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876 assert(local_interfaces()->at(i)->is_klass(), "must be a klass"); |
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877 InstanceKlass* interf = InstanceKlass::cast(local_interfaces()->at(i)); |
| 0 | 878 assert(interf->is_interface(), "expected interface"); |
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879 interf->add_implementor(this_as_klass_oop); |
| 0 | 880 } |
| 881 } | |
| 882 | |
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883 bool InstanceKlass::can_be_primary_super_slow() const { |
| 0 | 884 if (is_interface()) |
| 885 return false; | |
| 886 else | |
| 887 return Klass::can_be_primary_super_slow(); | |
| 888 } | |
| 889 | |
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890 GrowableArray<Klass*>* InstanceKlass::compute_secondary_supers(int num_extra_slots) { |
| 0 | 891 // The secondaries are the implemented interfaces. |
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892 InstanceKlass* ik = InstanceKlass::cast(this); |
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893 Array<Klass*>* interfaces = ik->transitive_interfaces(); |
| 0 | 894 int num_secondaries = num_extra_slots + interfaces->length(); |
| 895 if (num_secondaries == 0) { | |
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896 // Must share this for correct bootstrapping! |
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897 set_secondary_supers(Universe::the_empty_klass_array()); |
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898 return NULL; |
| 0 | 899 } else if (num_extra_slots == 0) { |
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900 // The secondary super list is exactly the same as the transitive interfaces. |
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901 // Redefine classes has to be careful not to delete this! |
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902 set_secondary_supers(interfaces); |
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903 return NULL; |
| 0 | 904 } else { |
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905 // Copy transitive interfaces to a temporary growable array to be constructed |
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906 // into the secondary super list with extra slots. |
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907 GrowableArray<Klass*>* secondaries = new GrowableArray<Klass*>(interfaces->length()); |
| 0 | 908 for (int i = 0; i < interfaces->length(); i++) { |
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909 secondaries->push(interfaces->at(i)); |
| 0 | 910 } |
| 911 return secondaries; | |
| 912 } | |
| 913 } | |
| 914 | |
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915 bool InstanceKlass::compute_is_subtype_of(Klass* k) { |
| 6983 | 916 if (k->is_interface()) { |
| 0 | 917 return implements_interface(k); |
| 918 } else { | |
| 919 return Klass::compute_is_subtype_of(k); | |
| 920 } | |
| 921 } | |
| 922 | |
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923 bool InstanceKlass::implements_interface(Klass* k) const { |
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924 if (this == k) return true; |
| 6983 | 925 assert(k->is_interface(), "should be an interface class"); |
| 0 | 926 for (int i = 0; i < transitive_interfaces()->length(); i++) { |
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927 if (transitive_interfaces()->at(i) == k) { |
| 0 | 928 return true; |
| 929 } | |
| 930 } | |
| 931 return false; | |
| 932 } | |
| 933 | |
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934 objArrayOop InstanceKlass::allocate_objArray(int n, int length, TRAPS) { |
| 0 | 935 if (length < 0) THROW_0(vmSymbols::java_lang_NegativeArraySizeException()); |
| 936 if (length > arrayOopDesc::max_array_length(T_OBJECT)) { | |
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937 report_java_out_of_memory("Requested array size exceeds VM limit"); |
|
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938 JvmtiExport::post_array_size_exhausted(); |
| 0 | 939 THROW_OOP_0(Universe::out_of_memory_error_array_size()); |
| 940 } | |
| 941 int size = objArrayOopDesc::object_size(length); | |
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942 Klass* ak = array_klass(n, CHECK_NULL); |
| 0 | 943 KlassHandle h_ak (THREAD, ak); |
| 944 objArrayOop o = | |
| 945 (objArrayOop)CollectedHeap::array_allocate(h_ak, size, length, CHECK_NULL); | |
| 946 return o; | |
| 947 } | |
| 948 | |
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949 instanceOop InstanceKlass::register_finalizer(instanceOop i, TRAPS) { |
| 0 | 950 if (TraceFinalizerRegistration) { |
| 951 tty->print("Registered "); | |
| 952 i->print_value_on(tty); | |
| 953 tty->print_cr(" (" INTPTR_FORMAT ") as finalizable", (address)i); | |
| 954 } | |
| 955 instanceHandle h_i(THREAD, i); | |
| 956 // Pass the handle as argument, JavaCalls::call expects oop as jobjects | |
| 957 JavaValue result(T_VOID); | |
| 958 JavaCallArguments args(h_i); | |
| 959 methodHandle mh (THREAD, Universe::finalizer_register_method()); | |
| 960 JavaCalls::call(&result, mh, &args, CHECK_NULL); | |
| 961 return h_i(); | |
| 962 } | |
| 963 | |
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964 instanceOop InstanceKlass::allocate_instance(TRAPS) { |
| 0 | 965 bool has_finalizer_flag = has_finalizer(); // Query before possible GC |
| 966 int size = size_helper(); // Query before forming handle. | |
| 967 | |
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968 KlassHandle h_k(THREAD, this); |
| 0 | 969 |
| 970 instanceOop i; | |
| 971 | |
| 972 i = (instanceOop)CollectedHeap::obj_allocate(h_k, size, CHECK_NULL); | |
| 973 if (has_finalizer_flag && !RegisterFinalizersAtInit) { | |
| 974 i = register_finalizer(i, CHECK_NULL); | |
| 975 } | |
| 976 return i; | |
| 977 } | |
| 978 | |
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979 void InstanceKlass::check_valid_for_instantiation(bool throwError, TRAPS) { |
| 0 | 980 if (is_interface() || is_abstract()) { |
| 981 ResourceMark rm(THREAD); | |
| 982 THROW_MSG(throwError ? vmSymbols::java_lang_InstantiationError() | |
| 983 : vmSymbols::java_lang_InstantiationException(), external_name()); | |
| 984 } | |
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985 if (this == SystemDictionary::Class_klass()) { |
| 0 | 986 ResourceMark rm(THREAD); |
| 987 THROW_MSG(throwError ? vmSymbols::java_lang_IllegalAccessError() | |
| 988 : vmSymbols::java_lang_IllegalAccessException(), external_name()); | |
| 989 } | |
| 990 } | |
| 991 | |
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992 Klass* InstanceKlass::array_klass_impl(bool or_null, int n, TRAPS) { |
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993 instanceKlassHandle this_oop(THREAD, this); |
| 0 | 994 return array_klass_impl(this_oop, or_null, n, THREAD); |
| 995 } | |
| 996 | |
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997 Klass* InstanceKlass::array_klass_impl(instanceKlassHandle this_oop, bool or_null, int n, TRAPS) { |
| 0 | 998 if (this_oop->array_klasses() == NULL) { |
| 999 if (or_null) return NULL; | |
| 1000 | |
| 1001 ResourceMark rm; | |
| 1002 JavaThread *jt = (JavaThread *)THREAD; | |
| 1003 { | |
| 1004 // Atomic creation of array_klasses | |
| 1005 MutexLocker mc(Compile_lock, THREAD); // for vtables | |
| 1006 MutexLocker ma(MultiArray_lock, THREAD); | |
| 1007 | |
| 1008 // Check if update has already taken place | |
| 1009 if (this_oop->array_klasses() == NULL) { | |
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1010 Klass* k = ObjArrayKlass::allocate_objArray_klass(this_oop->class_loader_data(), 1, this_oop, CHECK_NULL); |
| 0 | 1011 this_oop->set_array_klasses(k); |
| 1012 } | |
| 1013 } | |
| 1014 } | |
| 1015 // _this will always be set at this point | |
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1016 ObjArrayKlass* oak = (ObjArrayKlass*)this_oop->array_klasses(); |
| 0 | 1017 if (or_null) { |
| 1018 return oak->array_klass_or_null(n); | |
| 1019 } | |
| 1020 return oak->array_klass(n, CHECK_NULL); | |
| 1021 } | |
| 1022 | |
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1023 Klass* InstanceKlass::array_klass_impl(bool or_null, TRAPS) { |
| 0 | 1024 return array_klass_impl(or_null, 1, THREAD); |
| 1025 } | |
| 1026 | |
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1027 void InstanceKlass::call_class_initializer(TRAPS) { |
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1028 instanceKlassHandle ik (THREAD, this); |
| 0 | 1029 call_class_initializer_impl(ik, THREAD); |
| 1030 } | |
| 1031 | |
| 1032 static int call_class_initializer_impl_counter = 0; // for debugging | |
| 1033 | |
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1034 Method* InstanceKlass::class_initializer() { |
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1035 Method* clinit = find_method( |
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1036 vmSymbols::class_initializer_name(), vmSymbols::void_method_signature()); |
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1037 if (clinit != NULL && clinit->has_valid_initializer_flags()) { |
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1038 return clinit; |
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1039 } |
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1040 return NULL; |
| 0 | 1041 } |
| 1042 | |
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1043 void InstanceKlass::call_class_initializer_impl(instanceKlassHandle this_oop, TRAPS) { |
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1044 if (ReplayCompiles && |
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1045 (ReplaySuppressInitializers == 1 || |
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1046 ReplaySuppressInitializers >= 2 && this_oop->class_loader() != NULL)) { |
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1047 // Hide the existence of the initializer for the purpose of replaying the compile |
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1048 return; |
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1049 } |
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1050 |
| 0 | 1051 methodHandle h_method(THREAD, this_oop->class_initializer()); |
| 1052 assert(!this_oop->is_initialized(), "we cannot initialize twice"); | |
| 1053 if (TraceClassInitialization) { | |
| 1054 tty->print("%d Initializing ", call_class_initializer_impl_counter++); | |
| 1055 this_oop->name()->print_value(); | |
| 1056 tty->print_cr("%s (" INTPTR_FORMAT ")", h_method() == NULL ? "(no method)" : "", (address)this_oop()); | |
| 1057 } | |
| 1058 if (h_method() != NULL) { | |
| 1059 JavaCallArguments args; // No arguments | |
| 1060 JavaValue result(T_VOID); | |
| 1061 JavaCalls::call(&result, h_method, &args, CHECK); // Static call (no args) | |
| 1062 } | |
| 1063 } | |
| 1064 | |
| 1065 | |
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1066 void InstanceKlass::mask_for(methodHandle method, int bci, |
| 0 | 1067 InterpreterOopMap* entry_for) { |
| 1068 // Dirty read, then double-check under a lock. | |
| 1069 if (_oop_map_cache == NULL) { | |
| 1070 // Otherwise, allocate a new one. | |
| 1071 MutexLocker x(OopMapCacheAlloc_lock); | |
| 1072 // First time use. Allocate a cache in C heap | |
| 1073 if (_oop_map_cache == NULL) { | |
| 1074 _oop_map_cache = new OopMapCache(); | |
| 1075 } | |
| 1076 } | |
| 1077 // _oop_map_cache is constant after init; lookup below does is own locking. | |
| 1078 _oop_map_cache->lookup(method, bci, entry_for); | |
| 1079 } | |
| 1080 | |
| 1081 | |
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1082 bool InstanceKlass::find_local_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const { |
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1083 for (JavaFieldStream fs(this); !fs.done(); fs.next()) { |
| 3938 | 1084 Symbol* f_name = fs.name(); |
| 1085 Symbol* f_sig = fs.signature(); | |
| 0 | 1086 if (f_name == name && f_sig == sig) { |
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1087 fd->initialize(const_cast<InstanceKlass*>(this), fs.index()); |
| 0 | 1088 return true; |
| 1089 } | |
| 1090 } | |
| 1091 return false; | |
| 1092 } | |
| 1093 | |
| 1094 | |
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1095 Klass* InstanceKlass::find_interface_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const { |
| 0 | 1096 const int n = local_interfaces()->length(); |
| 1097 for (int i = 0; i < n; i++) { | |
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1098 Klass* intf1 = local_interfaces()->at(i); |
| 6983 | 1099 assert(intf1->is_interface(), "just checking type"); |
| 0 | 1100 // search for field in current interface |
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1101 if (InstanceKlass::cast(intf1)->find_local_field(name, sig, fd)) { |
| 0 | 1102 assert(fd->is_static(), "interface field must be static"); |
| 1103 return intf1; | |
| 1104 } | |
| 1105 // search for field in direct superinterfaces | |
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1106 Klass* intf2 = InstanceKlass::cast(intf1)->find_interface_field(name, sig, fd); |
| 0 | 1107 if (intf2 != NULL) return intf2; |
| 1108 } | |
| 1109 // otherwise field lookup fails | |
| 1110 return NULL; | |
| 1111 } | |
| 1112 | |
| 1113 | |
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1114 Klass* InstanceKlass::find_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const { |
| 0 | 1115 // search order according to newest JVM spec (5.4.3.2, p.167). |
| 1116 // 1) search for field in current klass | |
| 1117 if (find_local_field(name, sig, fd)) { | |
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1118 return const_cast<InstanceKlass*>(this); |
| 0 | 1119 } |
| 1120 // 2) search for field recursively in direct superinterfaces | |
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1121 { Klass* intf = find_interface_field(name, sig, fd); |
| 0 | 1122 if (intf != NULL) return intf; |
| 1123 } | |
| 1124 // 3) apply field lookup recursively if superclass exists | |
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1125 { Klass* supr = super(); |
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1126 if (supr != NULL) return InstanceKlass::cast(supr)->find_field(name, sig, fd); |
| 0 | 1127 } |
| 1128 // 4) otherwise field lookup fails | |
| 1129 return NULL; | |
| 1130 } | |
| 1131 | |
| 1132 | |
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1133 Klass* InstanceKlass::find_field(Symbol* name, Symbol* sig, bool is_static, fieldDescriptor* fd) const { |
| 0 | 1134 // search order according to newest JVM spec (5.4.3.2, p.167). |
| 1135 // 1) search for field in current klass | |
| 1136 if (find_local_field(name, sig, fd)) { | |
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1137 if (fd->is_static() == is_static) return const_cast<InstanceKlass*>(this); |
| 0 | 1138 } |
| 1139 // 2) search for field recursively in direct superinterfaces | |
| 1140 if (is_static) { | |
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1141 Klass* intf = find_interface_field(name, sig, fd); |
| 0 | 1142 if (intf != NULL) return intf; |
| 1143 } | |
| 1144 // 3) apply field lookup recursively if superclass exists | |
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1145 { Klass* supr = super(); |
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1146 if (supr != NULL) return InstanceKlass::cast(supr)->find_field(name, sig, is_static, fd); |
| 0 | 1147 } |
| 1148 // 4) otherwise field lookup fails | |
| 1149 return NULL; | |
| 1150 } | |
| 1151 | |
| 1152 | |
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1153 bool InstanceKlass::find_local_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const { |
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1154 for (JavaFieldStream fs(this); !fs.done(); fs.next()) { |
| 3938 | 1155 if (fs.offset() == offset) { |
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1156 fd->initialize(const_cast<InstanceKlass*>(this), fs.index()); |
| 0 | 1157 if (fd->is_static() == is_static) return true; |
| 1158 } | |
| 1159 } | |
| 1160 return false; | |
| 1161 } | |
| 1162 | |
| 1163 | |
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1164 bool InstanceKlass::find_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const { |
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1165 Klass* klass = const_cast<InstanceKlass*>(this); |
| 0 | 1166 while (klass != NULL) { |
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1167 if (InstanceKlass::cast(klass)->find_local_field_from_offset(offset, is_static, fd)) { |
| 0 | 1168 return true; |
| 1169 } | |
| 6983 | 1170 klass = klass->super(); |
| 0 | 1171 } |
| 1172 return false; | |
| 1173 } | |
| 1174 | |
| 1175 | |
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1176 void InstanceKlass::methods_do(void f(Method* method)) { |
| 0 | 1177 int len = methods()->length(); |
| 1178 for (int index = 0; index < len; index++) { | |
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1179 Method* m = methods()->at(index); |
| 0 | 1180 assert(m->is_method(), "must be method"); |
| 1181 f(m); | |
| 1182 } | |
| 1183 } | |
| 1184 | |
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1185 |
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1186 void InstanceKlass::do_local_static_fields(FieldClosure* cl) { |
| 3938 | 1187 for (JavaFieldStream fs(this); !fs.done(); fs.next()) { |
| 1188 if (fs.access_flags().is_static()) { | |
| 1189 fieldDescriptor fd; | |
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1190 fd.initialize(this, fs.index()); |
| 3938 | 1191 cl->do_field(&fd); |
| 1192 } | |
| 0 | 1193 } |
| 1194 } | |
| 1195 | |
| 1196 | |
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1197 void InstanceKlass::do_local_static_fields(void f(fieldDescriptor*, TRAPS), TRAPS) { |
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1198 instanceKlassHandle h_this(THREAD, this); |
| 0 | 1199 do_local_static_fields_impl(h_this, f, CHECK); |
| 1200 } | |
| 1201 | |
| 1202 | |
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1203 void InstanceKlass::do_local_static_fields_impl(instanceKlassHandle this_oop, void f(fieldDescriptor* fd, TRAPS), TRAPS) { |
| 3938 | 1204 for (JavaFieldStream fs(this_oop()); !fs.done(); fs.next()) { |
| 1205 if (fs.access_flags().is_static()) { | |
| 1206 fieldDescriptor fd; | |
| 1207 fd.initialize(this_oop(), fs.index()); | |
| 1208 f(&fd, CHECK); | |
| 1209 } | |
| 0 | 1210 } |
| 1211 } | |
| 1212 | |
| 1213 | |
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1214 static int compare_fields_by_offset(int* a, int* b) { |
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1215 return a[0] - b[0]; |
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1216 } |
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1217 |
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1218 void InstanceKlass::do_nonstatic_fields(FieldClosure* cl) { |
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1219 InstanceKlass* super = superklass(); |
| 0 | 1220 if (super != NULL) { |
| 1221 super->do_nonstatic_fields(cl); | |
| 1222 } | |
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1223 fieldDescriptor fd; |
| 3938 | 1224 int length = java_fields_count(); |
|
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1225 // In DebugInfo nonstatic fields are sorted by offset. |
| 6197 | 1226 int* fields_sorted = NEW_C_HEAP_ARRAY(int, 2*(length+1), mtClass); |
|
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1227 int j = 0; |
| 3938 | 1228 for (int i = 0; i < length; i += 1) { |
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1229 fd.initialize(this, i); |
|
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1230 if (!fd.is_static()) { |
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1231 fields_sorted[j + 0] = fd.offset(); |
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1232 fields_sorted[j + 1] = i; |
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1233 j += 2; |
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1234 } |
| 0 | 1235 } |
|
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1236 if (j > 0) { |
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1237 length = j; |
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1238 // _sort_Fn is defined in growableArray.hpp. |
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1239 qsort(fields_sorted, length/2, 2*sizeof(int), (_sort_Fn)compare_fields_by_offset); |
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1240 for (int i = 0; i < length; i += 2) { |
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1241 fd.initialize(this, fields_sorted[i + 1]); |
|
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1242 assert(!fd.is_static() && fd.offset() == fields_sorted[i], "only nonstatic fields"); |
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1243 cl->do_field(&fd); |
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1244 } |
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1245 } |
| 6197 | 1246 FREE_C_HEAP_ARRAY(int, fields_sorted, mtClass); |
| 0 | 1247 } |
| 1248 | |
| 1249 | |
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1250 void InstanceKlass::array_klasses_do(void f(Klass* k, TRAPS), TRAPS) { |
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1251 if (array_klasses() != NULL) |
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1252 ArrayKlass::cast(array_klasses())->array_klasses_do(f, THREAD); |
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1253 } |
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1254 |
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1255 void InstanceKlass::array_klasses_do(void f(Klass* k)) { |
| 0 | 1256 if (array_klasses() != NULL) |
|
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1257 ArrayKlass::cast(array_klasses())->array_klasses_do(f); |
| 0 | 1258 } |
| 1259 | |
| 1260 | |
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1261 void InstanceKlass::with_array_klasses_do(void f(Klass* k)) { |
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1262 f(this); |
| 0 | 1263 array_klasses_do(f); |
| 1264 } | |
| 1265 | |
| 1266 #ifdef ASSERT | |
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1267 static int linear_search(Array<Method*>* methods, Symbol* name, Symbol* signature) { |
| 0 | 1268 int len = methods->length(); |
| 1269 for (int index = 0; index < len; index++) { | |
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1270 Method* m = methods->at(index); |
| 0 | 1271 assert(m->is_method(), "must be method"); |
| 1272 if (m->signature() == signature && m->name() == name) { | |
| 1273 return index; | |
| 1274 } | |
| 1275 } | |
| 1276 return -1; | |
| 1277 } | |
| 1278 #endif | |
| 1279 | |
| 6934 | 1280 static int binary_search(Array<Method*>* methods, Symbol* name) { |
| 0 | 1281 int len = methods->length(); |
| 1282 // methods are sorted, so do binary search | |
| 1283 int l = 0; | |
| 1284 int h = len - 1; | |
| 1285 while (l <= h) { | |
| 1286 int mid = (l + h) >> 1; | |
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1287 Method* m = methods->at(mid); |
| 0 | 1288 assert(m->is_method(), "must be method"); |
| 1289 int res = m->name()->fast_compare(name); | |
| 1290 if (res == 0) { | |
| 6934 | 1291 return mid; |
| 0 | 1292 } else if (res < 0) { |
| 1293 l = mid + 1; | |
| 1294 } else { | |
| 1295 h = mid - 1; | |
| 1296 } | |
| 1297 } | |
| 6934 | 1298 return -1; |
| 1299 } | |
| 1300 | |
| 1301 Method* InstanceKlass::find_method(Symbol* name, Symbol* signature) const { | |
| 1302 return InstanceKlass::find_method(methods(), name, signature); | |
| 1303 } | |
| 1304 | |
| 1305 Method* InstanceKlass::find_method( | |
| 1306 Array<Method*>* methods, Symbol* name, Symbol* signature) { | |
| 1307 int hit = binary_search(methods, name); | |
| 1308 if (hit != -1) { | |
| 1309 Method* m = methods->at(hit); | |
| 1310 // Do linear search to find matching signature. First, quick check | |
| 1311 // for common case | |
| 1312 if (m->signature() == signature) return m; | |
| 1313 // search downwards through overloaded methods | |
| 1314 int i; | |
| 1315 for (i = hit - 1; i >= 0; --i) { | |
| 1316 Method* m = methods->at(i); | |
| 1317 assert(m->is_method(), "must be method"); | |
| 1318 if (m->name() != name) break; | |
| 1319 if (m->signature() == signature) return m; | |
| 1320 } | |
| 1321 // search upwards | |
| 1322 for (i = hit + 1; i < methods->length(); ++i) { | |
| 1323 Method* m = methods->at(i); | |
| 1324 assert(m->is_method(), "must be method"); | |
| 1325 if (m->name() != name) break; | |
| 1326 if (m->signature() == signature) return m; | |
| 1327 } | |
| 1328 // not found | |
| 0 | 1329 #ifdef ASSERT |
| 6934 | 1330 int index = linear_search(methods, name, signature); |
| 1331 assert(index == -1, err_msg("binary search should have found entry %d", index)); | |
| 0 | 1332 #endif |
| 6934 | 1333 } |
| 0 | 1334 return NULL; |
| 1335 } | |
| 1336 | |
| 6934 | 1337 int InstanceKlass::find_method_by_name(Symbol* name, int* end) { |
| 1338 return find_method_by_name(methods(), name, end); | |
| 1339 } | |
| 1340 | |
| 1341 int InstanceKlass::find_method_by_name( | |
| 1342 Array<Method*>* methods, Symbol* name, int* end_ptr) { | |
| 1343 assert(end_ptr != NULL, "just checking"); | |
| 1344 int start = binary_search(methods, name); | |
| 1345 int end = start + 1; | |
| 1346 if (start != -1) { | |
| 1347 while (start - 1 >= 0 && (methods->at(start - 1))->name() == name) --start; | |
| 1348 while (end < methods->length() && (methods->at(end))->name() == name) ++end; | |
| 1349 *end_ptr = end; | |
| 1350 return start; | |
| 1351 } | |
| 1352 return -1; | |
| 1353 } | |
| 1354 | |
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1355 Method* InstanceKlass::uncached_lookup_method(Symbol* name, Symbol* signature) const { |
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1356 Klass* klass = const_cast<InstanceKlass*>(this); |
| 0 | 1357 while (klass != NULL) { |
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1358 Method* method = InstanceKlass::cast(klass)->find_method(name, signature); |
| 0 | 1359 if (method != NULL) return method; |
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1360 klass = InstanceKlass::cast(klass)->super(); |
| 0 | 1361 } |
| 1362 return NULL; | |
| 1363 } | |
| 1364 | |
| 1365 // lookup a method in all the interfaces that this class implements | |
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1366 Method* InstanceKlass::lookup_method_in_all_interfaces(Symbol* name, |
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1367 Symbol* signature) const { |
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1368 Array<Klass*>* all_ifs = transitive_interfaces(); |
| 0 | 1369 int num_ifs = all_ifs->length(); |
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1370 InstanceKlass *ik = NULL; |
| 0 | 1371 for (int i = 0; i < num_ifs; i++) { |
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1372 ik = InstanceKlass::cast(all_ifs->at(i)); |
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1373 Method* m = ik->lookup_method(name, signature); |
| 0 | 1374 if (m != NULL) { |
| 1375 return m; | |
| 1376 } | |
| 1377 } | |
| 1378 return NULL; | |
| 1379 } | |
| 1380 | |
| 1381 /* jni_id_for_impl for jfieldIds only */ | |
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1382 JNIid* InstanceKlass::jni_id_for_impl(instanceKlassHandle this_oop, int offset) { |
| 0 | 1383 MutexLocker ml(JfieldIdCreation_lock); |
| 1384 // Retry lookup after we got the lock | |
| 1385 JNIid* probe = this_oop->jni_ids() == NULL ? NULL : this_oop->jni_ids()->find(offset); | |
| 1386 if (probe == NULL) { | |
| 1387 // Slow case, allocate new static field identifier | |
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1388 probe = new JNIid(this_oop(), offset, this_oop->jni_ids()); |
| 0 | 1389 this_oop->set_jni_ids(probe); |
| 1390 } | |
| 1391 return probe; | |
| 1392 } | |
| 1393 | |
| 1394 | |
| 1395 /* jni_id_for for jfieldIds only */ | |
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1396 JNIid* InstanceKlass::jni_id_for(int offset) { |
| 0 | 1397 JNIid* probe = jni_ids() == NULL ? NULL : jni_ids()->find(offset); |
| 1398 if (probe == NULL) { | |
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1399 probe = jni_id_for_impl(this, offset); |
| 0 | 1400 } |
| 1401 return probe; | |
| 1402 } | |
| 1403 | |
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1404 u2 InstanceKlass::enclosing_method_data(int offset) { |
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1405 Array<jushort>* inner_class_list = inner_classes(); |
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1406 if (inner_class_list == NULL) { |
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1407 return 0; |
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1408 } |
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1409 int length = inner_class_list->length(); |
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1410 if (length % inner_class_next_offset == 0) { |
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1411 return 0; |
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1412 } else { |
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1413 int index = length - enclosing_method_attribute_size; |
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1414 assert(offset < enclosing_method_attribute_size, "invalid offset"); |
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1415 return inner_class_list->at(index + offset); |
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1416 } |
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1417 } |
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1418 |
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1419 void InstanceKlass::set_enclosing_method_indices(u2 class_index, |
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1420 u2 method_index) { |
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1421 Array<jushort>* inner_class_list = inner_classes(); |
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1422 assert (inner_class_list != NULL, "_inner_classes list is not set up"); |
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1423 int length = inner_class_list->length(); |
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1424 if (length % inner_class_next_offset == enclosing_method_attribute_size) { |
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1425 int index = length - enclosing_method_attribute_size; |
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1426 inner_class_list->at_put( |
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1427 index + enclosing_method_class_index_offset, class_index); |
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1428 inner_class_list->at_put( |
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1429 index + enclosing_method_method_index_offset, method_index); |
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1430 } |
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1431 } |
| 0 | 1432 |
| 1433 // Lookup or create a jmethodID. | |
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1434 // This code is called by the VMThread and JavaThreads so the |
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1435 // locking has to be done very carefully to avoid deadlocks |
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1436 // and/or other cache consistency problems. |
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1437 // |
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1438 jmethodID InstanceKlass::get_jmethod_id(instanceKlassHandle ik_h, methodHandle method_h) { |
| 0 | 1439 size_t idnum = (size_t)method_h->method_idnum(); |
| 1440 jmethodID* jmeths = ik_h->methods_jmethod_ids_acquire(); | |
| 1441 size_t length = 0; | |
| 1442 jmethodID id = NULL; | |
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1443 |
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1444 // We use a double-check locking idiom here because this cache is |
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1445 // performance sensitive. In the normal system, this cache only |
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1446 // transitions from NULL to non-NULL which is safe because we use |
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1447 // release_set_methods_jmethod_ids() to advertise the new cache. |
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1448 // A partially constructed cache should never be seen by a racing |
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1449 // thread. We also use release_store_ptr() to save a new jmethodID |
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1450 // in the cache so a partially constructed jmethodID should never be |
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1451 // seen either. Cache reads of existing jmethodIDs proceed without a |
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1452 // lock, but cache writes of a new jmethodID requires uniqueness and |
|
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1453 // creation of the cache itself requires no leaks so a lock is |
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1454 // generally acquired in those two cases. |
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1455 // |
|
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1456 // If the RedefineClasses() API has been used, then this cache can |
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1457 // grow and we'll have transitions from non-NULL to bigger non-NULL. |
|
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1458 // Cache creation requires no leaks and we require safety between all |
|
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1459 // cache accesses and freeing of the old cache so a lock is generally |
|
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1460 // acquired when the RedefineClasses() API has been used. |
| 0 | 1461 |
|
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1462 if (jmeths != NULL) { |
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1463 // the cache already exists |
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1464 if (!ik_h->idnum_can_increment()) { |
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1465 // the cache can't grow so we can just get the current values |
|
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1466 get_jmethod_id_length_value(jmeths, idnum, &length, &id); |
|
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1467 } else { |
|
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1468 // cache can grow so we have to be more careful |
|
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1469 if (Threads::number_of_threads() == 0 || |
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1470 SafepointSynchronize::is_at_safepoint()) { |
|
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1471 // we're single threaded or at a safepoint - no locking needed |
|
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|
1472 get_jmethod_id_length_value(jmeths, idnum, &length, &id); |
|
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1473 } else { |
|
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|
1474 MutexLocker ml(JmethodIdCreation_lock); |
|
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|
1475 get_jmethod_id_length_value(jmeths, idnum, &length, &id); |
|
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1476 } |
|
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1477 } |
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1478 } |
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|
1479 // implied else: |
|
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1480 // we need to allocate a cache so default length and id values are good |
| 0 | 1481 |
|
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1482 if (jmeths == NULL || // no cache yet |
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1483 length <= idnum || // cache is too short |
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1484 id == NULL) { // cache doesn't contain entry |
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1485 |
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|
1486 // This function can be called by the VMThread so we have to do all |
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1487 // things that might block on a safepoint before grabbing the lock. |
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1488 // Otherwise, we can deadlock with the VMThread or have a cache |
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1489 // consistency issue. These vars keep track of what we might have |
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1490 // to free after the lock is dropped. |
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1491 jmethodID to_dealloc_id = NULL; |
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1492 jmethodID* to_dealloc_jmeths = NULL; |
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1493 |
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1494 // may not allocate new_jmeths or use it if we allocate it |
| 0 | 1495 jmethodID* new_jmeths = NULL; |
| 1496 if (length <= idnum) { | |
|
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1497 // allocate a new cache that might be used |
| 0 | 1498 size_t size = MAX2(idnum+1, (size_t)ik_h->idnum_allocated_count()); |
| 6197 | 1499 new_jmeths = NEW_C_HEAP_ARRAY(jmethodID, size+1, mtClass); |
| 0 | 1500 memset(new_jmeths, 0, (size+1)*sizeof(jmethodID)); |
|
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1501 // cache size is stored in element[0], other elements offset by one |
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1502 new_jmeths[0] = (jmethodID)size; |
| 0 | 1503 } |
| 1504 | |
|
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1505 // allocate a new jmethodID that might be used |
| 0 | 1506 jmethodID new_id = NULL; |
| 1507 if (method_h->is_old() && !method_h->is_obsolete()) { | |
| 1508 // The method passed in is old (but not obsolete), we need to use the current version | |
|
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1509 Method* current_method = ik_h->method_with_idnum((int)idnum); |
| 0 | 1510 assert(current_method != NULL, "old and but not obsolete, so should exist"); |
|
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1511 new_id = Method::make_jmethod_id(ik_h->class_loader_data(), current_method); |
| 0 | 1512 } else { |
| 1513 // It is the current version of the method or an obsolete method, | |
| 1514 // use the version passed in | |
|
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1515 new_id = Method::make_jmethod_id(ik_h->class_loader_data(), method_h()); |
| 0 | 1516 } |
| 1517 | |
|
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1518 if (Threads::number_of_threads() == 0 || |
|
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1519 SafepointSynchronize::is_at_safepoint()) { |
|
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1520 // we're single threaded or at a safepoint - no locking needed |
|
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1521 id = get_jmethod_id_fetch_or_update(ik_h, idnum, new_id, new_jmeths, |
|
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1522 &to_dealloc_id, &to_dealloc_jmeths); |
|
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1523 } else { |
| 0 | 1524 MutexLocker ml(JmethodIdCreation_lock); |
|
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1525 id = get_jmethod_id_fetch_or_update(ik_h, idnum, new_id, new_jmeths, |
|
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1526 &to_dealloc_id, &to_dealloc_jmeths); |
|
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1527 } |
|
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|
1528 |
|
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1529 // The lock has been dropped so we can free resources. |
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1530 // Free up either the old cache or the new cache if we allocated one. |
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1531 if (to_dealloc_jmeths != NULL) { |
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|
1532 FreeHeap(to_dealloc_jmeths); |
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|
1533 } |
|
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1534 // free up the new ID since it wasn't needed |
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1535 if (to_dealloc_id != NULL) { |
|
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1536 Method::destroy_jmethod_id(ik_h->class_loader_data(), to_dealloc_id); |
|
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1537 } |
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|
1538 } |
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|
1539 return id; |
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1540 } |
| 0 | 1541 |
|
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1542 |
|
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|
1543 // Common code to fetch the jmethodID from the cache or update the |
|
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1544 // cache with the new jmethodID. This function should never do anything |
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1545 // that causes the caller to go to a safepoint or we can deadlock with |
|
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1546 // the VMThread or have cache consistency issues. |
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1547 // |
|
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1548 jmethodID InstanceKlass::get_jmethod_id_fetch_or_update( |
|
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1549 instanceKlassHandle ik_h, size_t idnum, jmethodID new_id, |
|
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|
1550 jmethodID* new_jmeths, jmethodID* to_dealloc_id_p, |
|
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1551 jmethodID** to_dealloc_jmeths_p) { |
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|
1552 assert(new_id != NULL, "sanity check"); |
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|
1553 assert(to_dealloc_id_p != NULL, "sanity check"); |
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|
1554 assert(to_dealloc_jmeths_p != NULL, "sanity check"); |
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|
1555 assert(Threads::number_of_threads() == 0 || |
|
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|
1556 SafepointSynchronize::is_at_safepoint() || |
|
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|
1557 JmethodIdCreation_lock->owned_by_self(), "sanity check"); |
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|
1558 |
|
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|
1559 // reacquire the cache - we are locked, single threaded or at a safepoint |
|
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|
1560 jmethodID* jmeths = ik_h->methods_jmethod_ids_acquire(); |
|
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|
1561 jmethodID id = NULL; |
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|
1562 size_t length = 0; |
| 0 | 1563 |
|
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|
1564 if (jmeths == NULL || // no cache yet |
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|
1565 (length = (size_t)jmeths[0]) <= idnum) { // cache is too short |
|
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|
1566 if (jmeths != NULL) { |
|
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|
1567 // copy any existing entries from the old cache |
|
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|
1568 for (size_t index = 0; index < length; index++) { |
|
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|
1569 new_jmeths[index+1] = jmeths[index+1]; |
| 0 | 1570 } |
|
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|
1571 *to_dealloc_jmeths_p = jmeths; // save old cache for later delete |
| 0 | 1572 } |
|
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|
1573 ik_h->release_set_methods_jmethod_ids(jmeths = new_jmeths); |
|
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|
1574 } else { |
|
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|
1575 // fetch jmethodID (if any) from the existing cache |
|
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|
1576 id = jmeths[idnum+1]; |
|
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|
1577 *to_dealloc_jmeths_p = new_jmeths; // save new cache for later delete |
|
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|
1578 } |
|
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|
1579 if (id == NULL) { |
|
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|
1580 // No matching jmethodID in the existing cache or we have a new |
|
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|
1581 // cache or we just grew the cache. This cache write is done here |
|
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|
1582 // by the first thread to win the foot race because a jmethodID |
|
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|
1583 // needs to be unique once it is generally available. |
|
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|
1584 id = new_id; |
|
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|
1585 |
|
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|
1586 // The jmethodID cache can be read while unlocked so we have to |
|
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|
1587 // make sure the new jmethodID is complete before installing it |
|
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|
1588 // in the cache. |
|
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|
1589 OrderAccess::release_store_ptr(&jmeths[idnum+1], id); |
|
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|
1590 } else { |
|
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|
1591 *to_dealloc_id_p = new_id; // save new id for later delete |
| 0 | 1592 } |
| 1593 return id; | |
| 1594 } | |
| 1595 | |
| 1596 | |
|
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|
1597 // Common code to get the jmethodID cache length and the jmethodID |
|
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|
1598 // value at index idnum if there is one. |
|
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|
1599 // |
|
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1600 void InstanceKlass::get_jmethod_id_length_value(jmethodID* cache, |
|
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|
1601 size_t idnum, size_t *length_p, jmethodID* id_p) { |
|
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|
1602 assert(cache != NULL, "sanity check"); |
|
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|
1603 assert(length_p != NULL, "sanity check"); |
|
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|
1604 assert(id_p != NULL, "sanity check"); |
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1605 |
|
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|
1606 // cache size is stored in element[0], other elements offset by one |
|
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1607 *length_p = (size_t)cache[0]; |
|
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|
1608 if (*length_p <= idnum) { // cache is too short |
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1609 *id_p = NULL; |
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1610 } else { |
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1611 *id_p = cache[idnum+1]; // fetch jmethodID (if any) |
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1612 } |
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1613 } |
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1614 |
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1615 |
| 0 | 1616 // Lookup a jmethodID, NULL if not found. Do no blocking, no allocations, no handles |
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1617 jmethodID InstanceKlass::jmethod_id_or_null(Method* method) { |
| 0 | 1618 size_t idnum = (size_t)method->method_idnum(); |
| 1619 jmethodID* jmeths = methods_jmethod_ids_acquire(); | |
| 1620 size_t length; // length assigned as debugging crumb | |
| 1621 jmethodID id = NULL; | |
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1622 if (jmeths != NULL && // If there is a cache |
| 0 | 1623 (length = (size_t)jmeths[0]) > idnum) { // and if it is long enough, |
| 1624 id = jmeths[idnum+1]; // Look up the id (may be NULL) | |
| 1625 } | |
| 1626 return id; | |
| 1627 } | |
| 1628 | |
| 1629 | |
| 1630 // Cache an itable index | |
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1631 void InstanceKlass::set_cached_itable_index(size_t idnum, int index) { |
| 0 | 1632 int* indices = methods_cached_itable_indices_acquire(); |
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1633 int* to_dealloc_indices = NULL; |
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1634 |
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1635 // We use a double-check locking idiom here because this cache is |
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1636 // performance sensitive. In the normal system, this cache only |
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1637 // transitions from NULL to non-NULL which is safe because we use |
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1638 // release_set_methods_cached_itable_indices() to advertise the |
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1639 // new cache. A partially constructed cache should never be seen |
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1640 // by a racing thread. Cache reads and writes proceed without a |
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1641 // lock, but creation of the cache itself requires no leaks so a |
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1642 // lock is generally acquired in that case. |
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1643 // |
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1644 // If the RedefineClasses() API has been used, then this cache can |
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1645 // grow and we'll have transitions from non-NULL to bigger non-NULL. |
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1646 // Cache creation requires no leaks and we require safety between all |
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1647 // cache accesses and freeing of the old cache so a lock is generally |
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1648 // acquired when the RedefineClasses() API has been used. |
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1649 |
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1650 if (indices == NULL || idnum_can_increment()) { |
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1651 // we need a cache or the cache can grow |
| 0 | 1652 MutexLocker ml(JNICachedItableIndex_lock); |
|
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1653 // reacquire the cache to see if another thread already did the work |
| 0 | 1654 indices = methods_cached_itable_indices_acquire(); |
| 1655 size_t length = 0; | |
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1656 // cache size is stored in element[0], other elements offset by one |
| 0 | 1657 if (indices == NULL || (length = (size_t)indices[0]) <= idnum) { |
| 1658 size_t size = MAX2(idnum+1, (size_t)idnum_allocated_count()); | |
| 6197 | 1659 int* new_indices = NEW_C_HEAP_ARRAY(int, size+1, mtClass); |
|
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1660 new_indices[0] = (int)size; |
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1661 // copy any existing entries |
| 0 | 1662 size_t i; |
| 1663 for (i = 0; i < length; i++) { | |
| 1664 new_indices[i+1] = indices[i+1]; | |
| 1665 } | |
| 1666 // Set all the rest to -1 | |
| 1667 for (i = length; i < size; i++) { | |
| 1668 new_indices[i+1] = -1; | |
| 1669 } | |
| 1670 if (indices != NULL) { | |
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1671 // We have an old cache to delete so save it for after we |
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1672 // drop the lock. |
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1673 to_dealloc_indices = indices; |
| 0 | 1674 } |
| 1675 release_set_methods_cached_itable_indices(indices = new_indices); | |
| 1676 } | |
|
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1677 |
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1678 if (idnum_can_increment()) { |
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1679 // this cache can grow so we have to write to it safely |
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1680 indices[idnum+1] = index; |
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1681 } |
| 0 | 1682 } else { |
| 1683 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); | |
| 1684 } | |
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1685 |
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1686 if (!idnum_can_increment()) { |
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1687 // The cache cannot grow and this JNI itable index value does not |
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1688 // have to be unique like a jmethodID. If there is a race to set it, |
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1689 // it doesn't matter. |
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1690 indices[idnum+1] = index; |
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1691 } |
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1692 |
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1693 if (to_dealloc_indices != NULL) { |
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1694 // we allocated a new cache so free the old one |
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1695 FreeHeap(to_dealloc_indices); |
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1696 } |
| 0 | 1697 } |
| 1698 | |
| 1699 | |
| 1700 // Retrieve a cached itable index | |
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1701 int InstanceKlass::cached_itable_index(size_t idnum) { |
| 0 | 1702 int* indices = methods_cached_itable_indices_acquire(); |
| 1703 if (indices != NULL && ((size_t)indices[0]) > idnum) { | |
| 1704 // indices exist and are long enough, retrieve possible cached | |
| 1705 return indices[idnum+1]; | |
| 1706 } | |
| 1707 return -1; | |
| 1708 } | |
| 1709 | |
| 1710 | |
| 1711 // | |
| 1712 // Walk the list of dependent nmethods searching for nmethods which | |
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1713 // are dependent on the changes that were passed in and mark them for |
| 0 | 1714 // deoptimization. Returns the number of nmethods found. |
| 1715 // | |
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1716 int InstanceKlass::mark_dependent_nmethods(DepChange& changes) { |
| 0 | 1717 assert_locked_or_safepoint(CodeCache_lock); |
| 1718 int found = 0; | |
| 1719 nmethodBucket* b = _dependencies; | |
| 1720 while (b != NULL) { | |
| 1721 nmethod* nm = b->get_nmethod(); | |
| 1722 // since dependencies aren't removed until an nmethod becomes a zombie, | |
| 1723 // the dependency list may contain nmethods which aren't alive. | |
| 1724 if (nm->is_alive() && !nm->is_marked_for_deoptimization() && nm->check_dependency_on(changes)) { | |
| 1725 if (TraceDependencies) { | |
| 1726 ResourceMark rm; | |
| 1727 tty->print_cr("Marked for deoptimization"); | |
| 1728 tty->print_cr(" context = %s", this->external_name()); | |
| 1729 changes.print(); | |
| 1730 nm->print(); | |
| 1731 nm->print_dependencies(); | |
| 1732 } | |
| 1733 nm->mark_for_deoptimization(); | |
| 1734 found++; | |
| 1735 } | |
| 1736 b = b->next(); | |
| 1737 } | |
| 1738 return found; | |
| 1739 } | |
| 1740 | |
| 1741 | |
| 1742 // | |
| 1743 // Add an nmethodBucket to the list of dependencies for this nmethod. | |
| 1744 // It's possible that an nmethod has multiple dependencies on this klass | |
| 1745 // so a count is kept for each bucket to guarantee that creation and | |
| 1746 // deletion of dependencies is consistent. | |
| 1747 // | |
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1748 void InstanceKlass::add_dependent_nmethod(nmethod* nm) { |
| 0 | 1749 assert_locked_or_safepoint(CodeCache_lock); |
| 1750 nmethodBucket* b = _dependencies; | |
| 1751 nmethodBucket* last = NULL; | |
| 1752 while (b != NULL) { | |
| 1753 if (nm == b->get_nmethod()) { | |
| 1754 b->increment(); | |
| 1755 return; | |
| 1756 } | |
| 1757 b = b->next(); | |
| 1758 } | |
| 1759 _dependencies = new nmethodBucket(nm, _dependencies); | |
| 1760 } | |
| 1761 | |
| 1762 | |
| 1763 // | |
| 1764 // Decrement count of the nmethod in the dependency list and remove | |
| 1765 // the bucket competely when the count goes to 0. This method must | |
| 1766 // find a corresponding bucket otherwise there's a bug in the | |
| 1767 // recording of dependecies. | |
| 1768 // | |
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1769 void InstanceKlass::remove_dependent_nmethod(nmethod* nm) { |
| 0 | 1770 assert_locked_or_safepoint(CodeCache_lock); |
| 1771 nmethodBucket* b = _dependencies; | |
| 1772 nmethodBucket* last = NULL; | |
| 1773 while (b != NULL) { | |
| 1774 if (nm == b->get_nmethod()) { | |
| 1775 if (b->decrement() == 0) { | |
| 1776 if (last == NULL) { | |
| 1777 _dependencies = b->next(); | |
| 1778 } else { | |
| 1779 last->set_next(b->next()); | |
| 1780 } | |
| 1781 delete b; | |
| 1782 } | |
| 1783 return; | |
| 1784 } | |
| 1785 last = b; | |
| 1786 b = b->next(); | |
| 1787 } | |
| 1788 #ifdef ASSERT | |
| 1789 tty->print_cr("### %s can't find dependent nmethod:", this->external_name()); | |
| 1790 nm->print(); | |
| 1791 #endif // ASSERT | |
| 1792 ShouldNotReachHere(); | |
| 1793 } | |
| 1794 | |
| 1795 | |
| 1796 #ifndef PRODUCT | |
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1797 void InstanceKlass::print_dependent_nmethods(bool verbose) { |
| 0 | 1798 nmethodBucket* b = _dependencies; |
| 1799 int idx = 0; | |
| 1800 while (b != NULL) { | |
| 1801 nmethod* nm = b->get_nmethod(); | |
| 1802 tty->print("[%d] count=%d { ", idx++, b->count()); | |
| 1803 if (!verbose) { | |
| 1804 nm->print_on(tty, "nmethod"); | |
| 1805 tty->print_cr(" } "); | |
| 1806 } else { | |
| 1807 nm->print(); | |
| 1808 nm->print_dependencies(); | |
| 1809 tty->print_cr("--- } "); | |
| 1810 } | |
| 1811 b = b->next(); | |
| 1812 } | |
| 1813 } | |
| 1814 | |
| 1815 | |
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1816 bool InstanceKlass::is_dependent_nmethod(nmethod* nm) { |
| 0 | 1817 nmethodBucket* b = _dependencies; |
| 1818 while (b != NULL) { | |
| 1819 if (nm == b->get_nmethod()) { | |
| 1820 return true; | |
| 1821 } | |
| 1822 b = b->next(); | |
| 1823 } | |
| 1824 return false; | |
| 1825 } | |
| 1826 #endif //PRODUCT | |
| 1827 | |
| 1828 | |
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1829 // Garbage collection |
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1830 |
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1831 void InstanceKlass::oops_do(OopClosure* cl) { |
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1832 Klass::oops_do(cl); |
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1833 |
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1834 cl->do_oop(adr_protection_domain()); |
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1835 cl->do_oop(adr_signers()); |
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1836 cl->do_oop(adr_init_lock()); |
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1837 |
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1838 // Don't walk the arrays since they are walked from the ClassLoaderData objects. |
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1839 } |
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1840 |
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1841 #ifdef ASSERT |
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1842 template <class T> void assert_is_in(T *p) { |
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1843 T heap_oop = oopDesc::load_heap_oop(p); |
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1844 if (!oopDesc::is_null(heap_oop)) { |
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1845 oop o = oopDesc::decode_heap_oop_not_null(heap_oop); |
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1846 assert(Universe::heap()->is_in(o), "should be in heap"); |
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1847 } |
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1848 } |
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1849 template <class T> void assert_is_in_closed_subset(T *p) { |
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1850 T heap_oop = oopDesc::load_heap_oop(p); |
|
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1851 if (!oopDesc::is_null(heap_oop)) { |
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1852 oop o = oopDesc::decode_heap_oop_not_null(heap_oop); |
|
6725
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1853 assert(Universe::heap()->is_in_closed_subset(o), |
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1854 err_msg("should be in closed *p " INTPTR_FORMAT " " INTPTR_FORMAT, (address)p, (address)o)); |
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1855 } |
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1856 } |
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1857 template <class T> void assert_is_in_reserved(T *p) { |
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1858 T heap_oop = oopDesc::load_heap_oop(p); |
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1859 if (!oopDesc::is_null(heap_oop)) { |
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1860 oop o = oopDesc::decode_heap_oop_not_null(heap_oop); |
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1861 assert(Universe::heap()->is_in_reserved(o), "should be in reserved"); |
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1862 } |
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1863 } |
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1864 template <class T> void assert_nothing(T *p) {} |
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1865 |
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1866 #else |
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1867 template <class T> void assert_is_in(T *p) {} |
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1868 template <class T> void assert_is_in_closed_subset(T *p) {} |
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1869 template <class T> void assert_is_in_reserved(T *p) {} |
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1870 template <class T> void assert_nothing(T *p) {} |
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1871 #endif // ASSERT |
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1872 |
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1873 // |
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1874 // Macros that iterate over areas of oops which are specialized on type of |
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1875 // oop pointer either narrow or wide, depending on UseCompressedOops |
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1876 // |
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1877 // Parameters are: |
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1878 // T - type of oop to point to (either oop or narrowOop) |
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1879 // start_p - starting pointer for region to iterate over |
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1880 // count - number of oops or narrowOops to iterate over |
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1881 // do_oop - action to perform on each oop (it's arbitrary C code which |
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1882 // makes it more efficient to put in a macro rather than making |
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1883 // it a template function) |
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1884 // assert_fn - assert function which is template function because performance |
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1885 // doesn't matter when enabled. |
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1886 #define InstanceKlass_SPECIALIZED_OOP_ITERATE( \ |
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1887 T, start_p, count, do_oop, \ |
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1888 assert_fn) \ |
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1889 { \ |
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1890 T* p = (T*)(start_p); \ |
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1891 T* const end = p + (count); \ |
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1892 while (p < end) { \ |
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1893 (assert_fn)(p); \ |
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1894 do_oop; \ |
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1895 ++p; \ |
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1896 } \ |
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1897 } |
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1898 |
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1899 #define InstanceKlass_SPECIALIZED_OOP_REVERSE_ITERATE( \ |
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1900 T, start_p, count, do_oop, \ |
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1901 assert_fn) \ |
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1902 { \ |
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1903 T* const start = (T*)(start_p); \ |
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1904 T* p = start + (count); \ |
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1905 while (start < p) { \ |
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1906 --p; \ |
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1907 (assert_fn)(p); \ |
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1908 do_oop; \ |
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1909 } \ |
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1910 } |
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1911 |
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1912 #define InstanceKlass_SPECIALIZED_BOUNDED_OOP_ITERATE( \ |
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1913 T, start_p, count, low, high, \ |
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1914 do_oop, assert_fn) \ |
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1915 { \ |
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1916 T* const l = (T*)(low); \ |
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1917 T* const h = (T*)(high); \ |
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1918 assert(mask_bits((intptr_t)l, sizeof(T)-1) == 0 && \ |
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1919 mask_bits((intptr_t)h, sizeof(T)-1) == 0, \ |
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1920 "bounded region must be properly aligned"); \ |
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1921 T* p = (T*)(start_p); \ |
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1922 T* end = p + (count); \ |
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1923 if (p < l) p = l; \ |
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1924 if (end > h) end = h; \ |
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1925 while (p < end) { \ |
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1926 (assert_fn)(p); \ |
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1927 do_oop; \ |
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1928 ++p; \ |
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1929 } \ |
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1930 } |
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1931 |
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1932 |
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1933 // The following macros call specialized macros, passing either oop or |
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1934 // narrowOop as the specialization type. These test the UseCompressedOops |
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1935 // flag. |
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1936 #define InstanceKlass_OOP_MAP_ITERATE(obj, do_oop, assert_fn) \ |
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1937 { \ |
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1938 /* Compute oopmap block range. The common case \ |
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1939 is nonstatic_oop_map_size == 1. */ \ |
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1940 OopMapBlock* map = start_of_nonstatic_oop_maps(); \ |
| 938 | 1941 OopMapBlock* const end_map = map + nonstatic_oop_map_count(); \ |
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1942 if (UseCompressedOops) { \ |
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1943 while (map < end_map) { \ |
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1944 InstanceKlass_SPECIALIZED_OOP_ITERATE(narrowOop, \ |
| 938 | 1945 obj->obj_field_addr<narrowOop>(map->offset()), map->count(), \ |
|
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1946 do_oop, assert_fn) \ |
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1947 ++map; \ |
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1948 } \ |
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1949 } else { \ |
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1950 while (map < end_map) { \ |
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1951 InstanceKlass_SPECIALIZED_OOP_ITERATE(oop, \ |
| 938 | 1952 obj->obj_field_addr<oop>(map->offset()), map->count(), \ |
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1953 do_oop, assert_fn) \ |
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1954 ++map; \ |
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1955 } \ |
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1956 } \ |
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1957 } |
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1958 |
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1959 #define InstanceKlass_OOP_MAP_REVERSE_ITERATE(obj, do_oop, assert_fn) \ |
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1960 { \ |
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1961 OopMapBlock* const start_map = start_of_nonstatic_oop_maps(); \ |
| 938 | 1962 OopMapBlock* map = start_map + nonstatic_oop_map_count(); \ |
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1963 if (UseCompressedOops) { \ |
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1964 while (start_map < map) { \ |
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1965 --map; \ |
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1966 InstanceKlass_SPECIALIZED_OOP_REVERSE_ITERATE(narrowOop, \ |
| 938 | 1967 obj->obj_field_addr<narrowOop>(map->offset()), map->count(), \ |
|
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1968 do_oop, assert_fn) \ |
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1969 } \ |
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1970 } else { \ |
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1971 while (start_map < map) { \ |
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1972 --map; \ |
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1973 InstanceKlass_SPECIALIZED_OOP_REVERSE_ITERATE(oop, \ |
| 938 | 1974 obj->obj_field_addr<oop>(map->offset()), map->count(), \ |
|
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1975 do_oop, assert_fn) \ |
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1976 } \ |
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1977 } \ |
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1978 } |
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1979 |
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1980 #define InstanceKlass_BOUNDED_OOP_MAP_ITERATE(obj, low, high, do_oop, \ |
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1981 assert_fn) \ |
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1982 { \ |
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1983 /* Compute oopmap block range. The common case is \ |
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1984 nonstatic_oop_map_size == 1, so we accept the \ |
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1985 usually non-existent extra overhead of examining \ |
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1986 all the maps. */ \ |
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1987 OopMapBlock* map = start_of_nonstatic_oop_maps(); \ |
| 938 | 1988 OopMapBlock* const end_map = map + nonstatic_oop_map_count(); \ |
|
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1989 if (UseCompressedOops) { \ |
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1990 while (map < end_map) { \ |
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1991 InstanceKlass_SPECIALIZED_BOUNDED_OOP_ITERATE(narrowOop, \ |
| 938 | 1992 obj->obj_field_addr<narrowOop>(map->offset()), map->count(), \ |
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1993 low, high, \ |
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1994 do_oop, assert_fn) \ |
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1995 ++map; \ |
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1996 } \ |
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1997 } else { \ |
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1998 while (map < end_map) { \ |
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1999 InstanceKlass_SPECIALIZED_BOUNDED_OOP_ITERATE(oop, \ |
| 938 | 2000 obj->obj_field_addr<oop>(map->offset()), map->count(), \ |
|
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2001 low, high, \ |
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2002 do_oop, assert_fn) \ |
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2003 ++map; \ |
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2004 } \ |
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2005 } \ |
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2006 } |
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2007 |
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2008 void InstanceKlass::oop_follow_contents(oop obj) { |
|
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2009 assert(obj != NULL, "can't follow the content of NULL object"); |
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2010 MarkSweep::follow_klass(obj->klass()); |
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2011 InstanceKlass_OOP_MAP_ITERATE( \ |
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2012 obj, \ |
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2013 MarkSweep::mark_and_push(p), \ |
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2014 assert_is_in_closed_subset) |
| 0 | 2015 } |
| 2016 | |
| 2017 #ifndef SERIALGC | |
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2018 void InstanceKlass::oop_follow_contents(ParCompactionManager* cm, |
| 0 | 2019 oop obj) { |
|
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2020 assert(obj != NULL, "can't follow the content of NULL object"); |
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2021 PSParallelCompact::follow_klass(cm, obj->klass()); |
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2022 // Only mark the header and let the scan of the meta-data mark |
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2023 // everything else. |
|
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2024 InstanceKlass_OOP_MAP_ITERATE( \ |
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2025 obj, \ |
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2026 PSParallelCompact::mark_and_push(cm, p), \ |
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2027 assert_is_in) |
| 0 | 2028 } |
| 2029 #endif // SERIALGC | |
| 2030 | |
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2031 // closure's do_metadata() method dictates whether the given closure should be |
| 0 | 2032 // applied to the klass ptr in the object header. |
| 2033 | |
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2034 #define if_do_metadata_checked(closure, nv_suffix) \ |
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2035 /* Make sure the non-virtual and the virtual versions match. */ \ |
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2036 assert(closure->do_metadata##nv_suffix() == closure->do_metadata(), \ |
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2037 "Inconsistency in do_metadata"); \ |
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2038 if (closure->do_metadata##nv_suffix()) |
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2039 |
|
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2040 #define InstanceKlass_OOP_OOP_ITERATE_DEFN(OopClosureType, nv_suffix) \ |
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2041 \ |
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2042 int InstanceKlass::oop_oop_iterate##nv_suffix(oop obj, OopClosureType* closure) { \ |
|
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2043 SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::ik);\ |
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2044 /* header */ \ |
|
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2045 if_do_metadata_checked(closure, nv_suffix) { \ |
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2046 closure->do_klass##nv_suffix(obj->klass()); \ |
|
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2047 } \ |
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2048 InstanceKlass_OOP_MAP_ITERATE( \ |
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2049 obj, \ |
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2050 SpecializationStats:: \ |
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2051 record_do_oop_call##nv_suffix(SpecializationStats::ik); \ |
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2052 (closure)->do_oop##nv_suffix(p), \ |
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2053 assert_is_in_closed_subset) \ |
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2054 return size_helper(); \ |
| 0 | 2055 } |
| 2056 | |
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2057 #ifndef SERIALGC |
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2058 #define InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DEFN(OopClosureType, nv_suffix) \ |
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2059 \ |
|
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2060 int InstanceKlass::oop_oop_iterate_backwards##nv_suffix(oop obj, \ |
|
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2061 OopClosureType* closure) { \ |
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2062 SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::ik); \ |
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2063 /* header */ \ |
|
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2064 if_do_metadata_checked(closure, nv_suffix) { \ |
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2065 closure->do_klass##nv_suffix(obj->klass()); \ |
|
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2066 } \ |
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2067 /* instance variables */ \ |
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2068 InstanceKlass_OOP_MAP_REVERSE_ITERATE( \ |
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2069 obj, \ |
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2070 SpecializationStats::record_do_oop_call##nv_suffix(SpecializationStats::ik);\ |
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2071 (closure)->do_oop##nv_suffix(p), \ |
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2072 assert_is_in_closed_subset) \ |
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2073 return size_helper(); \ |
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2074 } |
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2075 #endif // !SERIALGC |
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2076 |
|
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2077 #define InstanceKlass_OOP_OOP_ITERATE_DEFN_m(OopClosureType, nv_suffix) \ |
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2078 \ |
|
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2079 int InstanceKlass::oop_oop_iterate##nv_suffix##_m(oop obj, \ |
|
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2080 OopClosureType* closure, \ |
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2081 MemRegion mr) { \ |
|
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2082 SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::ik);\ |
|
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2083 if_do_metadata_checked(closure, nv_suffix) { \ |
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2084 if (mr.contains(obj)) { \ |
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2085 closure->do_klass##nv_suffix(obj->klass()); \ |
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2086 } \ |
|
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2087 } \ |
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2088 InstanceKlass_BOUNDED_OOP_MAP_ITERATE( \ |
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2089 obj, mr.start(), mr.end(), \ |
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2090 (closure)->do_oop##nv_suffix(p), \ |
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2091 assert_is_in_closed_subset) \ |
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2092 return size_helper(); \ |
| 0 | 2093 } |
| 2094 | |
| 2095 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_DEFN) | |
|
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2096 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_DEFN) |
| 0 | 2097 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_DEFN_m) |
|
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2098 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_DEFN_m) |
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2099 #ifndef SERIALGC |
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2100 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DEFN) |
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2101 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DEFN) |
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2102 #endif // !SERIALGC |
| 0 | 2103 |
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2104 int InstanceKlass::oop_adjust_pointers(oop obj) { |
| 0 | 2105 int size = size_helper(); |
|
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2106 InstanceKlass_OOP_MAP_ITERATE( \ |
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2107 obj, \ |
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2108 MarkSweep::adjust_pointer(p), \ |
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2109 assert_is_in) |
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2110 MarkSweep::adjust_klass(obj->klass()); |
| 0 | 2111 return size; |
| 2112 } | |
| 2113 | |
| 2114 #ifndef SERIALGC | |
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2115 void InstanceKlass::oop_push_contents(PSPromotionManager* pm, oop obj) { |
|
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2116 InstanceKlass_OOP_MAP_REVERSE_ITERATE( \ |
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2117 obj, \ |
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2118 if (PSScavenge::should_scavenge(p)) { \ |
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2119 pm->claim_or_forward_depth(p); \ |
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2120 }, \ |
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2121 assert_nothing ) |
| 0 | 2122 } |
| 2123 | |
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2124 int InstanceKlass::oop_update_pointers(ParCompactionManager* cm, oop obj) { |
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2125 int size = size_helper(); |
|
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2126 InstanceKlass_OOP_MAP_ITERATE( \ |
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2127 obj, \ |
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2128 PSParallelCompact::adjust_pointer(p), \ |
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2129 assert_is_in) |
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2130 obj->update_header(cm); |
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2131 return size; |
| 0 | 2132 } |
| 2133 | |
| 2134 #endif // SERIALGC | |
| 2135 | |
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2136 void InstanceKlass::clean_implementors_list(BoolObjectClosure* is_alive) { |
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2137 assert(is_loader_alive(is_alive), "this klass should be live"); |
|
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2138 if (is_interface()) { |
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2139 if (ClassUnloading) { |
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2140 Klass* impl = implementor(); |
|
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2141 if (impl != NULL) { |
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2142 if (!impl->is_loader_alive(is_alive)) { |
|
5998
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2143 // remove this guy |
|
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2144 *adr_implementor() = NULL; |
|
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2145 } |
| 0 | 2146 } |
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2147 } |
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2148 } |
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2149 } |
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2150 |
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2151 void InstanceKlass::clean_method_data(BoolObjectClosure* is_alive) { |
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2152 #ifdef COMPILER2 |
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2153 // Currently only used by C2. |
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2154 for (int m = 0; m < methods()->length(); m++) { |
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2155 MethodData* mdo = methods()->at(m)->method_data(); |
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2156 if (mdo != NULL) { |
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2157 for (ProfileData* data = mdo->first_data(); |
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2158 mdo->is_valid(data); |
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2159 data = mdo->next_data(data)) { |
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2160 data->clean_weak_klass_links(is_alive); |
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2161 } |
| 0 | 2162 } |
| 2163 } | |
|
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2164 #else |
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2165 #ifdef ASSERT |
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2166 // Verify that we haven't started to use MDOs for C1. |
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2167 for (int m = 0; m < methods()->length(); m++) { |
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2168 MethodData* mdo = methods()->at(m)->method_data(); |
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2169 assert(mdo == NULL, "Didn't expect C1 to use MDOs"); |
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2170 } |
|
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2171 #endif // ASSERT |
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2172 #endif // !COMPILER2 |
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2173 } |
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2174 |
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2175 |
|
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2176 static void remove_unshareable_in_class(Klass* k) { |
|
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2177 // remove klass's unshareable info |
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2178 k->remove_unshareable_info(); |
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2179 } |
|
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2180 |
|
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2181 void InstanceKlass::remove_unshareable_info() { |
|
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2182 Klass::remove_unshareable_info(); |
|
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2183 // Unlink the class |
|
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2184 if (is_linked()) { |
|
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2185 unlink_class(); |
|
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2186 } |
|
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2187 init_implementor(); |
|
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2188 |
|
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2189 constants()->remove_unshareable_info(); |
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2190 |
|
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2191 for (int i = 0; i < methods()->length(); i++) { |
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2192 Method* m = methods()->at(i); |
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2193 m->remove_unshareable_info(); |
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2194 } |
|
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2195 |
|
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2196 // Need to reinstate when reading back the class. |
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2197 set_init_lock(NULL); |
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2198 |
|
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2199 // do array classes also. |
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2200 array_klasses_do(remove_unshareable_in_class); |
| 0 | 2201 } |
| 2202 | |
|
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2203 void restore_unshareable_in_class(Klass* k, TRAPS) { |
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2204 k->restore_unshareable_info(CHECK); |
| 0 | 2205 } |
| 2206 | |
|
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2207 void InstanceKlass::restore_unshareable_info(TRAPS) { |
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2208 Klass::restore_unshareable_info(CHECK); |
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2209 instanceKlassHandle ik(THREAD, this); |
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2210 |
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2211 Array<Method*>* methods = ik->methods(); |
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2212 int num_methods = methods->length(); |
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2213 for (int index2 = 0; index2 < num_methods; ++index2) { |
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2214 methodHandle m(THREAD, methods->at(index2)); |
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2215 m()->link_method(m, CHECK); |
|
6733
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2216 // restore method's vtable by calling a virtual function |
|
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2217 m->restore_vtable(); |
|
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2218 } |
|
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2219 if (JvmtiExport::has_redefined_a_class()) { |
|
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2220 // Reinitialize vtable because RedefineClasses may have changed some |
|
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2221 // entries in this vtable for super classes so the CDS vtable might |
|
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2222 // point to old or obsolete entries. RedefineClasses doesn't fix up |
|
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2223 // vtables in the shared system dictionary, only the main one. |
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2224 // It also redefines the itable too so fix that too. |
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2225 ResourceMark rm(THREAD); |
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2226 ik->vtable()->initialize_vtable(false, CHECK); |
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2227 ik->itable()->initialize_itable(false, CHECK); |
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2228 } |
|
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2229 |
|
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2230 // Allocate a simple java object for a lock. |
|
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2231 // This needs to be a java object because during class initialization |
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2232 // it can be held across a java call. |
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2233 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK); |
|
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2234 Handle h(THREAD, (oop)r); |
|
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2235 ik->set_init_lock(h()); |
|
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2236 |
|
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2237 // restore constant pool resolved references |
|
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2238 ik->constants()->restore_unshareable_info(CHECK); |
|
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2239 |
|
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2240 ik->array_klasses_do(restore_unshareable_in_class, CHECK); |
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2241 } |
|
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2242 |
|
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2243 static void clear_all_breakpoints(Method* m) { |
| 0 | 2244 m->clear_all_breakpoints(); |
| 2245 } | |
| 2246 | |
|
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2247 void InstanceKlass::release_C_heap_structures() { |
| 0 | 2248 // Deallocate oop map cache |
| 2249 if (_oop_map_cache != NULL) { | |
| 2250 delete _oop_map_cache; | |
| 2251 _oop_map_cache = NULL; | |
| 2252 } | |
| 2253 | |
| 2254 // Deallocate JNI identifiers for jfieldIDs | |
| 2255 JNIid::deallocate(jni_ids()); | |
| 2256 set_jni_ids(NULL); | |
| 2257 | |
| 2258 jmethodID* jmeths = methods_jmethod_ids_acquire(); | |
| 2259 if (jmeths != (jmethodID*)NULL) { | |
| 2260 release_set_methods_jmethod_ids(NULL); | |
| 2261 FreeHeap(jmeths); | |
| 2262 } | |
| 2263 | |
| 2264 int* indices = methods_cached_itable_indices_acquire(); | |
| 2265 if (indices != (int*)NULL) { | |
| 2266 release_set_methods_cached_itable_indices(NULL); | |
| 2267 FreeHeap(indices); | |
| 2268 } | |
| 2269 | |
| 2270 // release dependencies | |
| 2271 nmethodBucket* b = _dependencies; | |
| 2272 _dependencies = NULL; | |
| 2273 while (b != NULL) { | |
| 2274 nmethodBucket* next = b->next(); | |
| 2275 delete b; | |
| 2276 b = next; | |
| 2277 } | |
| 2278 | |
| 2279 // Deallocate breakpoint records | |
| 2280 if (breakpoints() != 0x0) { | |
| 2281 methods_do(clear_all_breakpoints); | |
| 2282 assert(breakpoints() == 0x0, "should have cleared breakpoints"); | |
| 2283 } | |
| 2284 | |
| 2285 // deallocate information about previous versions | |
| 2286 if (_previous_versions != NULL) { | |
| 2287 for (int i = _previous_versions->length() - 1; i >= 0; i--) { | |
| 2288 PreviousVersionNode * pv_node = _previous_versions->at(i); | |
| 2289 delete pv_node; | |
| 2290 } | |
| 2291 delete _previous_versions; | |
| 2292 _previous_versions = NULL; | |
| 2293 } | |
| 2294 | |
| 2295 // deallocate the cached class file | |
| 2296 if (_cached_class_file_bytes != NULL) { | |
| 6197 | 2297 os::free(_cached_class_file_bytes, mtClass); |
| 0 | 2298 _cached_class_file_bytes = NULL; |
| 2299 _cached_class_file_len = 0; | |
| 2300 } | |
|
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2301 |
|
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2302 // Decrement symbol reference counts associated with the unloaded class. |
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2303 if (_name != NULL) _name->decrement_refcount(); |
|
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2304 // unreference array name derived from this class name (arrays of an unloaded |
|
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2305 // class can't be referenced anymore). |
|
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2306 if (_array_name != NULL) _array_name->decrement_refcount(); |
|
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2307 if (_source_file_name != NULL) _source_file_name->decrement_refcount(); |
|
6203
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2308 if (_source_debug_extension != NULL) FREE_C_HEAP_ARRAY(char, _source_debug_extension, mtClass); |
|
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2309 } |
|
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2310 |
|
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2311 void InstanceKlass::set_source_file_name(Symbol* n) { |
|
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2312 _source_file_name = n; |
|
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2313 if (_source_file_name != NULL) _source_file_name->increment_refcount(); |
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2314 } |
|
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2315 |
|
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2316 void InstanceKlass::set_source_debug_extension(char* array, int length) { |
|
6203
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2317 if (array == NULL) { |
|
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2318 _source_debug_extension = NULL; |
|
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2319 } else { |
|
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2320 // Adding one to the attribute length in order to store a null terminator |
|
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2321 // character could cause an overflow because the attribute length is |
|
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2322 // already coded with an u4 in the classfile, but in practice, it's |
|
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2323 // unlikely to happen. |
|
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|
2324 assert((length+1) > length, "Overflow checking"); |
|
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2325 char* sde = NEW_C_HEAP_ARRAY(char, (length + 1), mtClass); |
|
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2326 for (int i = 0; i < length; i++) { |
|
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2327 sde[i] = array[i]; |
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|
2328 } |
|
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|
2329 sde[length] = '\0'; |
|
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|
2330 _source_debug_extension = sde; |
|
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|
2331 } |
| 0 | 2332 } |
| 2333 | |
|
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2334 address InstanceKlass::static_field_addr(int offset) { |
|
6735
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|
2335 return (address)(offset + InstanceMirrorKlass::offset_of_static_fields() + (intptr_t)java_mirror()); |
|
2376
c7f3d0b4570f
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|
2336 } |
|
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|
2337 |
|
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|
2338 |
|
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2339 const char* InstanceKlass::signature_name() const { |
| 0 | 2340 const char* src = (const char*) (name()->as_C_string()); |
| 2341 const int src_length = (int)strlen(src); | |
| 2342 char* dest = NEW_RESOURCE_ARRAY(char, src_length + 3); | |
| 2343 int src_index = 0; | |
| 2344 int dest_index = 0; | |
| 2345 dest[dest_index++] = 'L'; | |
| 2346 while (src_index < src_length) { | |
| 2347 dest[dest_index++] = src[src_index++]; | |
| 2348 } | |
| 2349 dest[dest_index++] = ';'; | |
| 2350 dest[dest_index] = '\0'; | |
| 2351 return dest; | |
| 2352 } | |
| 2353 | |
| 2354 // different verisons of is_same_class_package | |
|
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2355 bool InstanceKlass::is_same_class_package(Klass* class2) { |
|
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2356 Klass* class1 = this; |
|
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2357 oop classloader1 = InstanceKlass::cast(class1)->class_loader(); |
| 6983 | 2358 Symbol* classname1 = class1->name(); |
| 2359 | |
| 2360 if (class2->oop_is_objArray()) { | |
|
6831
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|
2361 class2 = ObjArrayKlass::cast(class2)->bottom_klass(); |
| 0 | 2362 } |
| 2363 oop classloader2; | |
| 6983 | 2364 if (class2->oop_is_instance()) { |
|
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2365 classloader2 = InstanceKlass::cast(class2)->class_loader(); |
| 0 | 2366 } else { |
| 6983 | 2367 assert(class2->oop_is_typeArray(), "should be type array"); |
| 0 | 2368 classloader2 = NULL; |
| 2369 } | |
| 6983 | 2370 Symbol* classname2 = class2->name(); |
| 0 | 2371 |
|
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2372 return InstanceKlass::is_same_class_package(classloader1, classname1, |
| 0 | 2373 classloader2, classname2); |
| 2374 } | |
| 2375 | |
|
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2376 bool InstanceKlass::is_same_class_package(oop classloader2, Symbol* classname2) { |
|
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2377 Klass* class1 = this; |
|
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2378 oop classloader1 = InstanceKlass::cast(class1)->class_loader(); |
| 6983 | 2379 Symbol* classname1 = class1->name(); |
| 0 | 2380 |
|
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2381 return InstanceKlass::is_same_class_package(classloader1, classname1, |
| 0 | 2382 classloader2, classname2); |
| 2383 } | |
| 2384 | |
| 2385 // return true if two classes are in the same package, classloader | |
| 2386 // and classname information is enough to determine a class's package | |
|
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2387 bool InstanceKlass::is_same_class_package(oop class_loader1, Symbol* class_name1, |
|
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|
2388 oop class_loader2, Symbol* class_name2) { |
| 0 | 2389 if (class_loader1 != class_loader2) { |
| 2390 return false; | |
|
665
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|
2391 } else if (class_name1 == class_name2) { |
|
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|
2392 return true; // skip painful bytewise comparison |
| 0 | 2393 } else { |
| 2394 ResourceMark rm; | |
| 2395 | |
|
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|
2396 // The Symbol*'s are in UTF8 encoding. Since we only need to check explicitly |
| 0 | 2397 // for ASCII characters ('/', 'L', '['), we can keep them in UTF8 encoding. |
| 2398 // Otherwise, we just compare jbyte values between the strings. | |
|
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|
2399 const jbyte *name1 = class_name1->base(); |
|
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|
2400 const jbyte *name2 = class_name2->base(); |
|
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|
2401 |
|
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|
2402 const jbyte *last_slash1 = UTF8::strrchr(name1, class_name1->utf8_length(), '/'); |
|
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|
2403 const jbyte *last_slash2 = UTF8::strrchr(name2, class_name2->utf8_length(), '/'); |
| 0 | 2404 |
| 2405 if ((last_slash1 == NULL) || (last_slash2 == NULL)) { | |
| 2406 // One of the two doesn't have a package. Only return true | |
| 2407 // if the other one also doesn't have a package. | |
| 2408 return last_slash1 == last_slash2; | |
| 2409 } else { | |
| 2410 // Skip over '['s | |
| 2411 if (*name1 == '[') { | |
| 2412 do { | |
| 2413 name1++; | |
| 2414 } while (*name1 == '['); | |
| 2415 if (*name1 != 'L') { | |
| 2416 // Something is terribly wrong. Shouldn't be here. | |
| 2417 return false; | |
| 2418 } | |
| 2419 } | |
| 2420 if (*name2 == '[') { | |
| 2421 do { | |
| 2422 name2++; | |
| 2423 } while (*name2 == '['); | |
| 2424 if (*name2 != 'L') { | |
| 2425 // Something is terribly wrong. Shouldn't be here. | |
| 2426 return false; | |
| 2427 } | |
| 2428 } | |
| 2429 | |
| 2430 // Check that package part is identical | |
| 2431 int length1 = last_slash1 - name1; | |
| 2432 int length2 = last_slash2 - name2; | |
| 2433 | |
| 2434 return UTF8::equal(name1, length1, name2, length2); | |
| 2435 } | |
| 2436 } | |
| 2437 } | |
| 2438 | |
|
652
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|
2439 // Returns true iff super_method can be overridden by a method in targetclassname |
|
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|
2440 // See JSL 3rd edition 8.4.6.1 |
|
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|
2441 // Assumes name-signature match |
|
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2442 // "this" is InstanceKlass of super_method which must exist |
|
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|
2443 // note that the InstanceKlass of the method in the targetclassname has not always been created yet |
|
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|
2444 bool InstanceKlass::is_override(methodHandle super_method, Handle targetclassloader, Symbol* targetclassname, TRAPS) { |
|
652
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|
2445 // Private methods can not be overridden |
|
4aaa9f5e02a8
4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
acorn
parents:
605
diff
changeset
|
2446 if (super_method->is_private()) { |
|
4aaa9f5e02a8
4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
acorn
parents:
605
diff
changeset
|
2447 return false; |
|
4aaa9f5e02a8
4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
acorn
parents:
605
diff
changeset
|
2448 } |
|
4aaa9f5e02a8
4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
acorn
parents:
605
diff
changeset
|
2449 // If super method is accessible, then override |
|
4aaa9f5e02a8
4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
acorn
parents:
605
diff
changeset
|
2450 if ((super_method->is_protected()) || |
|
4aaa9f5e02a8
4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
acorn
parents:
605
diff
changeset
|
2451 (super_method->is_public())) { |
|
4aaa9f5e02a8
4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
acorn
parents:
605
diff
changeset
|
2452 return true; |
|
4aaa9f5e02a8
4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
acorn
parents:
605
diff
changeset
|
2453 } |
|
4aaa9f5e02a8
4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
acorn
parents:
605
diff
changeset
|
2454 // Package-private methods are not inherited outside of package |
|
4aaa9f5e02a8
4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
acorn
parents:
605
diff
changeset
|
2455 assert(super_method->is_package_private(), "must be package private"); |
|
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
2456 return(is_same_class_package(targetclassloader(), targetclassname)); |
|
652
4aaa9f5e02a8
4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
acorn
parents:
605
diff
changeset
|
2457 } |
| 0 | 2458 |
|
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2459 /* defined for now in jvm.cpp, for historical reasons *-- |
|
6725
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6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
2460 Klass* InstanceKlass::compute_enclosing_class_impl(instanceKlassHandle self, |
|
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
2461 Symbol*& simple_name_result, TRAPS) { |
|
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2462 ... |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2463 } |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2464 */ |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2465 |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2466 // tell if two classes have the same enclosing class (at package level) |
|
6725
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coleenp
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|
2467 bool InstanceKlass::is_same_package_member_impl(instanceKlassHandle class1, |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
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|
2468 Klass* class2_oop, TRAPS) { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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|
2469 if (class2_oop == class1()) return true; |
| 6983 | 2470 if (!class2_oop->oop_is_instance()) return false; |
|
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2471 instanceKlassHandle class2(THREAD, class2_oop); |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
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|
2472 |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2473 // must be in same package before we try anything else |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2474 if (!class1->is_same_class_package(class2->class_loader(), class2->name())) |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2475 return false; |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2476 |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2477 // As long as there is an outer1.getEnclosingClass, |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2478 // shift the search outward. |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
changeset
|
2479 instanceKlassHandle outer1 = class1; |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2480 for (;;) { |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2481 // As we walk along, look for equalities between outer1 and class2. |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2482 // Eventually, the walks will terminate as outer1 stops |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2483 // at the top-level class around the original class. |
|
1126
933a3e806ce6
6895168: JCK api/signaturetest/sigtest.basic.html#basic test fails for jdk 5.0 with HS 16 in nightly build
xlu
parents:
1039
diff
changeset
|
2484 bool ignore_inner_is_member; |
|
6725
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6964458: Reimplement class meta-data storage to use native memory
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|
2485 Klass* next = outer1->compute_enclosing_class(&ignore_inner_is_member, |
|
1126
933a3e806ce6
6895168: JCK api/signaturetest/sigtest.basic.html#basic test fails for jdk 5.0 with HS 16 in nightly build
xlu
parents:
1039
diff
changeset
|
2486 CHECK_false); |
|
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2487 if (next == NULL) break; |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2488 if (next == class2()) return true; |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2489 outer1 = instanceKlassHandle(THREAD, next); |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2490 } |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2491 |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2492 // Now do the same for class2. |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2493 instanceKlassHandle outer2 = class2; |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2494 for (;;) { |
|
1126
933a3e806ce6
6895168: JCK api/signaturetest/sigtest.basic.html#basic test fails for jdk 5.0 with HS 16 in nightly build
xlu
parents:
1039
diff
changeset
|
2495 bool ignore_inner_is_member; |
|
6725
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|
2496 Klass* next = outer2->compute_enclosing_class(&ignore_inner_is_member, |
|
1126
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6895168: JCK api/signaturetest/sigtest.basic.html#basic test fails for jdk 5.0 with HS 16 in nightly build
xlu
parents:
1039
diff
changeset
|
2497 CHECK_false); |
|
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2498 if (next == NULL) break; |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2499 // Might as well check the new outer against all available values. |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2500 if (next == class1()) return true; |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2501 if (next == outer1()) return true; |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2502 outer2 = instanceKlassHandle(THREAD, next); |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2503 } |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2504 |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2505 // If by this point we have not found an equality between the |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2506 // two classes, we know they are in separate package members. |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2507 return false; |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2508 } |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2509 |
| 0 | 2510 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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6266
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changeset
|
2511 jint InstanceKlass::compute_modifier_flags(TRAPS) const { |
| 0 | 2512 jint access = access_flags().as_int(); |
| 2513 | |
| 2514 // But check if it happens to be member class. | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
2515 instanceKlassHandle ik(THREAD, this); |
|
5967
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
diff
changeset
|
2516 InnerClassesIterator iter(ik); |
|
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
diff
changeset
|
2517 for (; !iter.done(); iter.next()) { |
|
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
diff
changeset
|
2518 int ioff = iter.inner_class_info_index(); |
|
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
diff
changeset
|
2519 // Inner class attribute can be zero, skip it. |
|
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
diff
changeset
|
2520 // Strange but true: JVM spec. allows null inner class refs. |
|
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
diff
changeset
|
2521 if (ioff == 0) continue; |
|
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
diff
changeset
|
2522 |
|
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
diff
changeset
|
2523 // only look at classes that are already loaded |
|
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
diff
changeset
|
2524 // since we are looking for the flags for our self. |
|
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
diff
changeset
|
2525 Symbol* inner_name = ik->constants()->klass_name_at(ioff); |
|
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
diff
changeset
|
2526 if ((ik->name() == inner_name)) { |
|
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
diff
changeset
|
2527 // This is really a member class. |
|
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
diff
changeset
|
2528 access = iter.inner_access_flags(); |
|
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
diff
changeset
|
2529 break; |
| 0 | 2530 } |
| 2531 } | |
| 2532 // Remember to strip ACC_SUPER bit | |
| 2533 return (access & (~JVM_ACC_SUPER)) & JVM_ACC_WRITTEN_FLAGS; | |
| 2534 } | |
| 2535 | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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6266
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|
2536 jint InstanceKlass::jvmti_class_status() const { |
| 0 | 2537 jint result = 0; |
| 2538 | |
| 2539 if (is_linked()) { | |
| 2540 result |= JVMTI_CLASS_STATUS_VERIFIED | JVMTI_CLASS_STATUS_PREPARED; | |
| 2541 } | |
| 2542 | |
| 2543 if (is_initialized()) { | |
| 2544 assert(is_linked(), "Class status is not consistent"); | |
| 2545 result |= JVMTI_CLASS_STATUS_INITIALIZED; | |
| 2546 } | |
| 2547 if (is_in_error_state()) { | |
| 2548 result |= JVMTI_CLASS_STATUS_ERROR; | |
| 2549 } | |
| 2550 return result; | |
| 2551 } | |
| 2552 | |
|
6725
da91efe96a93
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6266
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changeset
|
2553 Method* InstanceKlass::method_at_itable(Klass* holder, int index, TRAPS) { |
| 0 | 2554 itableOffsetEntry* ioe = (itableOffsetEntry*)start_of_itable(); |
| 2555 int method_table_offset_in_words = ioe->offset()/wordSize; | |
| 2556 int nof_interfaces = (method_table_offset_in_words - itable_offset_in_words()) | |
| 2557 / itableOffsetEntry::size(); | |
| 2558 | |
| 2559 for (int cnt = 0 ; ; cnt ++, ioe ++) { | |
| 605 | 2560 // If the interface isn't implemented by the receiver class, |
| 0 | 2561 // the VM should throw IncompatibleClassChangeError. |
| 2562 if (cnt >= nof_interfaces) { | |
|
6725
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6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
2563 THROW_NULL(vmSymbols::java_lang_IncompatibleClassChangeError()); |
| 0 | 2564 } |
| 2565 | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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6266
diff
changeset
|
2566 Klass* ik = ioe->interface_klass(); |
| 0 | 2567 if (ik == holder) break; |
| 2568 } | |
| 2569 | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
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changeset
|
2570 itableMethodEntry* ime = ioe->first_method_entry(this); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
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|
2571 Method* m = ime[index].method(); |
| 0 | 2572 if (m == NULL) { |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
2573 THROW_NULL(vmSymbols::java_lang_AbstractMethodError()); |
| 0 | 2574 } |
| 2575 return m; | |
| 2576 } | |
| 2577 | |
| 2578 // On-stack replacement stuff | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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6266
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|
2579 void InstanceKlass::add_osr_nmethod(nmethod* n) { |
| 0 | 2580 // only one compilation can be active |
| 2581 NEEDS_CLEANUP | |
| 2582 // This is a short non-blocking critical region, so the no safepoint check is ok. | |
| 2583 OsrList_lock->lock_without_safepoint_check(); | |
| 2584 assert(n->is_osr_method(), "wrong kind of nmethod"); | |
|
989
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6863023: need non-perm oops in code cache for JSR 292
jrose
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diff
changeset
|
2585 n->set_osr_link(osr_nmethods_head()); |
| 0 | 2586 set_osr_nmethods_head(n); |
| 1783 | 2587 // Raise the highest osr level if necessary |
| 2588 if (TieredCompilation) { | |
|
6725
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6266
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|
2589 Method* m = n->method(); |
| 1783 | 2590 m->set_highest_osr_comp_level(MAX2(m->highest_osr_comp_level(), n->comp_level())); |
| 2591 } | |
| 0 | 2592 // Remember to unlock again |
| 2593 OsrList_lock->unlock(); | |
| 1783 | 2594 |
| 2595 // Get rid of the osr methods for the same bci that have lower levels. | |
| 2596 if (TieredCompilation) { | |
| 2597 for (int l = CompLevel_limited_profile; l < n->comp_level(); l++) { | |
| 2598 nmethod *inv = lookup_osr_nmethod(n->method(), n->osr_entry_bci(), l, true); | |
| 2599 if (inv != NULL && inv->is_in_use()) { | |
| 2600 inv->make_not_entrant(); | |
| 2601 } | |
| 2602 } | |
| 2603 } | |
| 0 | 2604 } |
| 2605 | |
| 2606 | |
|
6725
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6266
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|
2607 void InstanceKlass::remove_osr_nmethod(nmethod* n) { |
| 0 | 2608 // This is a short non-blocking critical region, so the no safepoint check is ok. |
| 2609 OsrList_lock->lock_without_safepoint_check(); | |
| 2610 assert(n->is_osr_method(), "wrong kind of nmethod"); | |
| 2611 nmethod* last = NULL; | |
| 2612 nmethod* cur = osr_nmethods_head(); | |
| 1783 | 2613 int max_level = CompLevel_none; // Find the max comp level excluding n |
|
6725
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6266
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|
2614 Method* m = n->method(); |
| 0 | 2615 // Search for match |
| 2616 while(cur != NULL && cur != n) { | |
| 1783 | 2617 if (TieredCompilation) { |
| 2618 // Find max level before n | |
| 2619 max_level = MAX2(max_level, cur->comp_level()); | |
| 2620 } | |
| 0 | 2621 last = cur; |
|
989
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jrose
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diff
changeset
|
2622 cur = cur->osr_link(); |
| 0 | 2623 } |
| 1783 | 2624 nmethod* next = NULL; |
| 0 | 2625 if (cur == n) { |
| 1783 | 2626 next = cur->osr_link(); |
| 0 | 2627 if (last == NULL) { |
| 2628 // Remove first element | |
| 1783 | 2629 set_osr_nmethods_head(next); |
| 0 | 2630 } else { |
| 1783 | 2631 last->set_osr_link(next); |
| 0 | 2632 } |
| 2633 } | |
|
989
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jrose
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876
diff
changeset
|
2634 n->set_osr_link(NULL); |
| 1783 | 2635 if (TieredCompilation) { |
| 2636 cur = next; | |
| 2637 while (cur != NULL) { | |
| 2638 // Find max level after n | |
| 2639 max_level = MAX2(max_level, cur->comp_level()); | |
| 2640 cur = cur->osr_link(); | |
| 2641 } | |
| 2642 m->set_highest_osr_comp_level(max_level); | |
| 2643 } | |
| 0 | 2644 // Remember to unlock again |
| 2645 OsrList_lock->unlock(); | |
| 2646 } | |
| 2647 | |
|
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2648 nmethod* InstanceKlass::lookup_osr_nmethod(Method* const m, int bci, int comp_level, bool match_level) const { |
| 0 | 2649 // This is a short non-blocking critical region, so the no safepoint check is ok. |
| 2650 OsrList_lock->lock_without_safepoint_check(); | |
| 2651 nmethod* osr = osr_nmethods_head(); | |
| 1783 | 2652 nmethod* best = NULL; |
| 0 | 2653 while (osr != NULL) { |
| 2654 assert(osr->is_osr_method(), "wrong kind of nmethod found in chain"); | |
| 1783 | 2655 // There can be a time when a c1 osr method exists but we are waiting |
| 2656 // for a c2 version. When c2 completes its osr nmethod we will trash | |
| 2657 // the c1 version and only be able to find the c2 version. However | |
| 2658 // while we overflow in the c1 code at back branches we don't want to | |
| 2659 // try and switch to the same code as we are already running | |
| 2660 | |
| 0 | 2661 if (osr->method() == m && |
| 2662 (bci == InvocationEntryBci || osr->osr_entry_bci() == bci)) { | |
| 1783 | 2663 if (match_level) { |
| 2664 if (osr->comp_level() == comp_level) { | |
| 2665 // Found a match - return it. | |
| 2666 OsrList_lock->unlock(); | |
| 2667 return osr; | |
| 2668 } | |
| 2669 } else { | |
| 2670 if (best == NULL || (osr->comp_level() > best->comp_level())) { | |
| 2671 if (osr->comp_level() == CompLevel_highest_tier) { | |
| 2672 // Found the best possible - return it. | |
| 2673 OsrList_lock->unlock(); | |
| 2674 return osr; | |
| 2675 } | |
| 2676 best = osr; | |
| 2677 } | |
| 2678 } | |
| 0 | 2679 } |
|
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2680 osr = osr->osr_link(); |
| 0 | 2681 } |
| 2682 OsrList_lock->unlock(); | |
| 1783 | 2683 if (best != NULL && best->comp_level() >= comp_level && match_level == false) { |
| 2684 return best; | |
| 2685 } | |
| 0 | 2686 return NULL; |
| 2687 } | |
| 2688 | |
| 2689 // ----------------------------------------------------------------------------------------------------- | |
|
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2690 // Printing |
|
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2691 |
| 0 | 2692 #ifndef PRODUCT |
| 2693 | |
|
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2694 #define BULLET " - " |
|
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2695 |
|
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2696 static const char* state_names[] = { |
|
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2697 "allocated", "loaded", "linked", "being_initialized", "fully_initialized", "initialization_error" |
|
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2698 }; |
|
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2699 |
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2700 void InstanceKlass::print_on(outputStream* st) const { |
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2701 assert(is_klass(), "must be klass"); |
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2702 Klass::print_on(st); |
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2703 |
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2704 st->print(BULLET"instance size: %d", size_helper()); st->cr(); |
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2705 st->print(BULLET"klass size: %d", size()); st->cr(); |
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2706 st->print(BULLET"access: "); access_flags().print_on(st); st->cr(); |
|
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2707 st->print(BULLET"state: "); st->print_cr(state_names[_init_state]); |
|
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2708 st->print(BULLET"name: "); name()->print_value_on(st); st->cr(); |
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2709 st->print(BULLET"super: "); super()->print_value_on_maybe_null(st); st->cr(); |
|
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2710 st->print(BULLET"sub: "); |
|
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2711 Klass* sub = subklass(); |
|
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2712 int n; |
|
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2713 for (n = 0; sub != NULL; n++, sub = sub->next_sibling()) { |
|
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2714 if (n < MaxSubklassPrintSize) { |
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2715 sub->print_value_on(st); |
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2716 st->print(" "); |
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2717 } |
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2718 } |
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2719 if (n >= MaxSubklassPrintSize) st->print("(%d more klasses...)", n - MaxSubklassPrintSize); |
|
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2720 st->cr(); |
|
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2721 |
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2722 if (is_interface()) { |
|
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2723 st->print_cr(BULLET"nof implementors: %d", nof_implementors()); |
|
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2724 if (nof_implementors() == 1) { |
|
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2725 st->print_cr(BULLET"implementor: "); |
|
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2726 st->print(" "); |
|
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2727 implementor()->print_value_on(st); |
|
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2728 st->cr(); |
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2729 } |
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2730 } |
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2731 |
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2732 st->print(BULLET"arrays: "); array_klasses()->print_value_on_maybe_null(st); st->cr(); |
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2733 st->print(BULLET"methods: "); methods()->print_value_on(st); st->cr(); |
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2734 if (Verbose) { |
|
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2735 Array<Method*>* method_array = methods(); |
|
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2736 for(int i = 0; i < method_array->length(); i++) { |
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2737 st->print("%d : ", i); method_array->at(i)->print_value(); st->cr(); |
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2738 } |
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2739 } |
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2740 st->print(BULLET"method ordering: "); method_ordering()->print_value_on(st); st->cr(); |
|
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2741 st->print(BULLET"local interfaces: "); local_interfaces()->print_value_on(st); st->cr(); |
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2742 st->print(BULLET"trans. interfaces: "); transitive_interfaces()->print_value_on(st); st->cr(); |
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2743 st->print(BULLET"constants: "); constants()->print_value_on(st); st->cr(); |
|
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2744 if (class_loader_data() != NULL) { |
|
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2745 st->print(BULLET"class loader data: "); |
|
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2746 class_loader_data()->print_value_on(st); |
|
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2747 st->cr(); |
|
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2748 } |
|
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2749 st->print(BULLET"protection domain: "); ((InstanceKlass*)this)->protection_domain()->print_value_on(st); st->cr(); |
|
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2750 st->print(BULLET"host class: "); host_klass()->print_value_on_maybe_null(st); st->cr(); |
|
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2751 st->print(BULLET"signers: "); signers()->print_value_on(st); st->cr(); |
|
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2752 st->print(BULLET"init_lock: "); ((oop)init_lock())->print_value_on(st); st->cr(); |
|
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2753 if (source_file_name() != NULL) { |
|
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2754 st->print(BULLET"source file: "); |
|
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2755 source_file_name()->print_value_on(st); |
|
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2756 st->cr(); |
|
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2757 } |
|
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2758 if (source_debug_extension() != NULL) { |
|
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|
2759 st->print(BULLET"source debug extension: "); |
|
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2760 st->print("%s", source_debug_extension()); |
|
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2761 st->cr(); |
|
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|
2762 } |
|
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2763 st->print(BULLET"annotations: "); annotations()->print_value_on(st); st->cr(); |
|
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2764 { |
|
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|
2765 ResourceMark rm; |
|
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|
2766 // PreviousVersionInfo objects returned via PreviousVersionWalker |
|
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2767 // contain a GrowableArray of handles. We have to clean up the |
|
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2768 // GrowableArray _after_ the PreviousVersionWalker destructor |
|
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2769 // has destroyed the handles. |
|
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2770 { |
|
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|
2771 bool have_pv = false; |
|
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2772 PreviousVersionWalker pvw((InstanceKlass*)this); |
|
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2773 for (PreviousVersionInfo * pv_info = pvw.next_previous_version(); |
|
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2774 pv_info != NULL; pv_info = pvw.next_previous_version()) { |
|
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|
2775 if (!have_pv) |
|
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2776 st->print(BULLET"previous version: "); |
|
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|
2777 have_pv = true; |
|
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2778 pv_info->prev_constant_pool_handle()()->print_value_on(st); |
|
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|
2779 } |
|
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|
2780 if (have_pv) st->cr(); |
|
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|
2781 } // pvw is cleaned up |
|
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|
2782 } // rm is cleaned up |
|
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2783 |
|
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|
2784 if (generic_signature() != NULL) { |
|
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|
2785 st->print(BULLET"generic signature: "); |
|
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|
2786 generic_signature()->print_value_on(st); |
|
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|
2787 st->cr(); |
|
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|
2788 } |
|
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|
2789 st->print(BULLET"inner classes: "); inner_classes()->print_value_on(st); st->cr(); |
|
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2790 st->print(BULLET"java mirror: "); java_mirror()->print_value_on(st); st->cr(); |
|
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changeset
|
2791 st->print(BULLET"vtable length %d (start addr: " INTPTR_FORMAT ")", vtable_length(), start_of_vtable()); st->cr(); |
|
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|
2792 st->print(BULLET"itable length %d (start addr: " INTPTR_FORMAT ")", itable_length(), start_of_itable()); st->cr(); |
|
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|
2793 st->print_cr(BULLET"---- static fields (%d words):", static_field_size()); |
|
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|
2794 FieldPrinter print_static_field(st); |
|
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|
2795 ((InstanceKlass*)this)->do_local_static_fields(&print_static_field); |
|
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|
2796 st->print_cr(BULLET"---- non-static fields (%d words):", nonstatic_field_size()); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
2797 FieldPrinter print_nonstatic_field(st); |
|
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|
2798 ((InstanceKlass*)this)->do_nonstatic_fields(&print_nonstatic_field); |
|
da91efe96a93
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|
2799 |
|
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|
2800 st->print(BULLET"non-static oop maps: "); |
|
da91efe96a93
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|
2801 OopMapBlock* map = start_of_nonstatic_oop_maps(); |
|
da91efe96a93
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|
2802 OopMapBlock* end_map = map + nonstatic_oop_map_count(); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
2803 while (map < end_map) { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
2804 st->print("%d-%d ", map->offset(), map->offset() + heapOopSize*(map->count() - 1)); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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changeset
|
2805 map++; |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
2806 } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
2807 st->cr(); |
|
da91efe96a93
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changeset
|
2808 } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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changeset
|
2809 |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
2810 #endif //PRODUCT |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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changeset
|
2811 |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
2812 void InstanceKlass::print_value_on(outputStream* st) const { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
2813 assert(is_klass(), "must be klass"); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
2814 name()->print_value_on(st); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
2815 } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
2816 |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
2817 #ifndef PRODUCT |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
2818 |
| 0 | 2819 void FieldPrinter::do_field(fieldDescriptor* fd) { |
|
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
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parents:
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diff
changeset
|
2820 _st->print(BULLET); |
|
2376
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2357
diff
changeset
|
2821 if (_obj == NULL) { |
| 0 | 2822 fd->print_on(_st); |
| 2823 _st->cr(); | |
| 2824 } else { | |
| 2825 fd->print_on_for(_st, _obj); | |
| 2826 _st->cr(); | |
| 2827 } | |
| 2828 } | |
| 2829 | |
| 2830 | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
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diff
changeset
|
2831 void InstanceKlass::oop_print_on(oop obj, outputStream* st) { |
| 0 | 2832 Klass::oop_print_on(obj, st); |
| 2833 | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
2834 if (this == SystemDictionary::String_klass()) { |
| 0 | 2835 typeArrayOop value = java_lang_String::value(obj); |
| 2836 juint offset = java_lang_String::offset(obj); | |
| 2837 juint length = java_lang_String::length(obj); | |
| 2838 if (value != NULL && | |
| 2839 value->is_typeArray() && | |
| 2840 offset <= (juint) value->length() && | |
| 2841 offset + length <= (juint) value->length()) { | |
|
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2842 st->print(BULLET"string: "); |
| 0 | 2843 Handle h_obj(obj); |
| 2844 java_lang_String::print(h_obj, st); | |
| 2845 st->cr(); | |
| 2846 if (!WizardMode) return; // that is enough | |
| 2847 } | |
| 2848 } | |
| 2849 | |
|
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2850 st->print_cr(BULLET"---- fields (total size %d words):", oop_size(obj)); |
|
2376
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2357
diff
changeset
|
2851 FieldPrinter print_field(st, obj); |
|
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2357
diff
changeset
|
2852 do_nonstatic_fields(&print_field); |
| 0 | 2853 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
2854 if (this == SystemDictionary::Class_klass()) { |
|
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2855 st->print(BULLET"signature: "); |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2856 java_lang_Class::print_signature(obj, st); |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2857 st->cr(); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2858 Klass* mirrored_klass = java_lang_Class::as_Klass(obj); |
|
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2859 st->print(BULLET"fake entry for mirror: "); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
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diff
changeset
|
2860 mirrored_klass->print_value_on_maybe_null(st); |
| 0 | 2861 st->cr(); |
|
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2862 st->print(BULLET"fake entry resolved_constructor: "); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2863 Method* ctor = java_lang_Class::resolved_constructor(obj); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2864 ctor->print_value_on_maybe_null(st); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
2865 Klass* array_klass = java_lang_Class::array_klass(obj); |
|
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2866 st->cr(); |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2867 st->print(BULLET"fake entry for array: "); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2868 array_klass->print_value_on_maybe_null(st); |
| 0 | 2869 st->cr(); |
|
2376
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2357
diff
changeset
|
2870 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:
2357
diff
changeset
|
2871 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
coleenp
parents:
6266
diff
changeset
|
2872 Klass* real_klass = java_lang_Class::as_Klass(obj); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2873 if (real_klass != NULL && real_klass->oop_is_instance()) { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2874 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
|
2875 } |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2876 } else if (this == SystemDictionary::MethodType_klass()) { |
|
1039
987e948ebbc8
6815692: method handle code needs some cleanup (post-6655638)
jrose
parents:
997
diff
changeset
|
2877 st->print(BULLET"signature: "); |
|
2357
8033953d67ff
7012648: move JSR 292 to package java.lang.invoke and adjust names
jrose
parents:
2334
diff
changeset
|
2878 java_lang_invoke_MethodType::print_signature(obj, st); |
|
1039
987e948ebbc8
6815692: method handle code needs some cleanup (post-6655638)
jrose
parents:
997
diff
changeset
|
2879 st->cr(); |
| 0 | 2880 } |
| 2881 } | |
| 2882 | |
|
1155
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1144
diff
changeset
|
2883 #endif //PRODUCT |
|
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1144
diff
changeset
|
2884 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2885 void InstanceKlass::oop_print_value_on(oop obj, outputStream* st) { |
| 0 | 2886 st->print("a "); |
| 2887 name()->print_value_on(st); | |
| 2888 obj->print_address_on(st); | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2889 if (this == SystemDictionary::String_klass() |
|
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2890 && java_lang_String::value(obj) != NULL) { |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2891 ResourceMark rm; |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2892 int len = java_lang_String::length(obj); |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2893 int plen = (len < 24 ? len : 12); |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2894 char* str = java_lang_String::as_utf8_string(obj, 0, plen); |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2895 st->print(" = \"%s\"", str); |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2896 if (len > plen) |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2897 st->print("...[%d]", len); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2898 } else if (this == SystemDictionary::Class_klass()) { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2899 Klass* k = java_lang_Class::as_Klass(obj); |
|
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2900 st->print(" = "); |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2901 if (k != NULL) { |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2902 k->print_value_on(st); |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2903 } else { |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2904 const char* tname = type2name(java_lang_Class::primitive_type(obj)); |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2905 st->print("%s", tname ? tname : "type?"); |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2906 } |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2907 } else if (this == SystemDictionary::MethodType_klass()) { |
|
1039
987e948ebbc8
6815692: method handle code needs some cleanup (post-6655638)
jrose
parents:
997
diff
changeset
|
2908 st->print(" = "); |
|
2357
8033953d67ff
7012648: move JSR 292 to package java.lang.invoke and adjust names
jrose
parents:
2334
diff
changeset
|
2909 java_lang_invoke_MethodType::print_signature(obj, st); |
|
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2910 } else if (java_lang_boxing_object::is_instance(obj)) { |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2911 st->print(" = "); |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2912 java_lang_boxing_object::print(obj, st); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2913 } 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
|
2914 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
|
2915 if (vmentry != NULL) { |
|
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
2916 st->print(" => "); |
|
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
2917 vmentry->print_value_on(st); |
|
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
2918 } |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2919 } else if (this == SystemDictionary::MemberName_klass()) { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2920 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
|
2921 if (vmtarget != NULL) { |
|
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
2922 st->print(" = "); |
|
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
2923 vmtarget->print_value_on(st); |
|
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
2924 } else { |
|
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
2925 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
|
2926 st->print("."); |
|
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
2927 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
changeset
|
2928 } |
|
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2929 } |
| 0 | 2930 } |
| 2931 | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2932 const char* InstanceKlass::internal_name() const { |
| 0 | 2933 return external_name(); |
| 2934 } | |
| 2935 | |
| 2936 // Verification | |
| 2937 | |
| 2938 class VerifyFieldClosure: public OopClosure { | |
|
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
52
diff
changeset
|
2939 protected: |
|
ba764ed4b6f2
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|
2940 template <class T> void do_oop_work(T* p) { |
|
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2941 oop obj = oopDesc::load_decode_heap_oop(p); |
|
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|
2942 if (!obj->is_oop_or_null()) { |
|
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|
2943 tty->print_cr("Failed: " PTR_FORMAT " -> " PTR_FORMAT, p, (address)obj); |
| 0 | 2944 Universe::print(); |
| 2945 guarantee(false, "boom"); | |
| 2946 } | |
| 2947 } | |
|
113
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2948 public: |
|
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|
2949 virtual void do_oop(oop* p) { VerifyFieldClosure::do_oop_work(p); } |
|
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2950 virtual void do_oop(narrowOop* p) { VerifyFieldClosure::do_oop_work(p); } |
| 0 | 2951 }; |
| 2952 | |
|
6725
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2953 void InstanceKlass::verify_on(outputStream* st) { |
|
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2954 Klass::verify_on(st); |
|
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2955 Thread *thread = Thread::current(); |
|
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2956 |
|
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|
2957 #ifndef PRODUCT |
|
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|
2958 // Avoid redundant verifies |
|
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|
2959 if (_verify_count == Universe::verify_count()) return; |
|
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2960 _verify_count = Universe::verify_count(); |
|
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2961 #endif |
|
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|
2962 // Verify that klass is present in SystemDictionary |
|
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|
2963 if (is_loaded() && !is_anonymous()) { |
|
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2964 Symbol* h_name = name(); |
|
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2965 SystemDictionary::verify_obj_klass_present(h_name, class_loader_data()); |
|
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|
2966 } |
|
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|
2967 |
|
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|
2968 // Verify static fields |
|
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|
2969 VerifyFieldClosure blk; |
|
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2970 |
|
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|
2971 // Verify vtables |
|
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|
2972 if (is_linked()) { |
|
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|
2973 ResourceMark rm(thread); |
|
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|
2974 // $$$ This used to be done only for m/s collections. Doing it |
|
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2975 // always seemed a valid generalization. (DLD -- 6/00) |
|
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|
2976 vtable()->verify(st); |
|
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|
2977 } |
|
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|
2978 |
|
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|
2979 // Verify first subklass |
|
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|
2980 if (subklass_oop() != NULL) { |
|
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|
2981 guarantee(subklass_oop()->is_metadata(), "should be in metaspace"); |
|
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|
2982 guarantee(subklass_oop()->is_klass(), "should be klass"); |
|
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|
2983 } |
|
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|
2984 |
|
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|
2985 // Verify siblings |
|
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|
2986 Klass* super = this->super(); |
|
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|
2987 Klass* sib = next_sibling(); |
|
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|
2988 if (sib != NULL) { |
|
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|
2989 if (sib == this) { |
|
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|
2990 fatal(err_msg("subclass points to itself " PTR_FORMAT, sib)); |
|
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|
2991 } |
|
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|
2992 |
|
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|
2993 guarantee(sib->is_metadata(), "should be in metaspace"); |
|
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|
2994 guarantee(sib->is_klass(), "should be klass"); |
|
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|
2995 guarantee(sib->super() == super, "siblings should have same superklass"); |
|
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|
2996 } |
|
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|
2997 |
|
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|
2998 // Verify implementor fields |
|
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|
2999 Klass* im = implementor(); |
|
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|
3000 if (im != NULL) { |
|
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|
3001 guarantee(is_interface(), "only interfaces should have implementor set"); |
|
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|
3002 guarantee(im->is_klass(), "should be klass"); |
| 6983 | 3003 guarantee(!im->is_interface() || im == this, |
|
6725
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|
3004 "implementors cannot be interfaces"); |
|
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|
3005 } |
|
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|
3006 |
|
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|
3007 // Verify local interfaces |
|
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|
3008 if (local_interfaces()) { |
|
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|
3009 Array<Klass*>* local_interfaces = this->local_interfaces(); |
|
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|
3010 for (int j = 0; j < local_interfaces->length(); j++) { |
|
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|
3011 Klass* e = local_interfaces->at(j); |
| 6983 | 3012 guarantee(e->is_klass() && e->is_interface(), "invalid local interface"); |
|
6725
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|
3013 } |
|
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|
3014 } |
|
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|
3015 |
|
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|
3016 // Verify transitive interfaces |
|
da91efe96a93
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|
3017 if (transitive_interfaces() != NULL) { |
|
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|
3018 Array<Klass*>* transitive_interfaces = this->transitive_interfaces(); |
|
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|
3019 for (int j = 0; j < transitive_interfaces->length(); j++) { |
|
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|
3020 Klass* e = transitive_interfaces->at(j); |
| 6983 | 3021 guarantee(e->is_klass() && e->is_interface(), "invalid transitive interface"); |
|
6725
da91efe96a93
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|
3022 } |
|
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|
3023 } |
|
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|
3024 |
|
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|
3025 // Verify methods |
|
da91efe96a93
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|
3026 if (methods() != NULL) { |
|
da91efe96a93
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|
3027 Array<Method*>* methods = this->methods(); |
|
da91efe96a93
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|
3028 for (int j = 0; j < methods->length(); j++) { |
|
da91efe96a93
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|
3029 guarantee(methods->at(j)->is_metadata(), "should be in metaspace"); |
|
da91efe96a93
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|
3030 guarantee(methods->at(j)->is_method(), "non-method in methods array"); |
|
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|
3031 } |
|
da91efe96a93
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|
3032 for (int j = 0; j < methods->length() - 1; j++) { |
|
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|
3033 Method* m1 = methods->at(j); |
|
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|
3034 Method* m2 = methods->at(j + 1); |
|
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|
3035 guarantee(m1->name()->fast_compare(m2->name()) <= 0, "methods not sorted correctly"); |
|
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|
3036 } |
|
da91efe96a93
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|
3037 } |
|
da91efe96a93
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|
3038 |
|
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|
3039 // Verify method ordering |
|
da91efe96a93
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|
3040 if (method_ordering() != NULL) { |
|
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|
3041 Array<int>* method_ordering = this->method_ordering(); |
|
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|
3042 int length = method_ordering->length(); |
|
da91efe96a93
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|
3043 if (JvmtiExport::can_maintain_original_method_order() || |
|
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|
3044 (UseSharedSpaces && length != 0)) { |
|
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|
3045 guarantee(length == methods()->length(), "invalid method ordering length"); |
|
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|
3046 jlong sum = 0; |
|
da91efe96a93
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|
3047 for (int j = 0; j < length; j++) { |
|
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|
3048 int original_index = method_ordering->at(j); |
|
da91efe96a93
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|
3049 guarantee(original_index >= 0, "invalid method ordering index"); |
|
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|
3050 guarantee(original_index < length, "invalid method ordering index"); |
|
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|
3051 sum += original_index; |
|
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|
3052 } |
|
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|
3053 // Verify sum of indices 0,1,...,length-1 |
|
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|
3054 guarantee(sum == ((jlong)length*(length-1))/2, "invalid method ordering sum"); |
|
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|
3055 } else { |
|
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|
3056 guarantee(length == 0, "invalid method ordering length"); |
|
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|
3057 } |
|
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|
3058 } |
|
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|
3059 |
|
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|
3060 // Verify JNI static field identifiers |
|
da91efe96a93
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|
3061 if (jni_ids() != NULL) { |
|
da91efe96a93
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|
3062 jni_ids()->verify(this); |
|
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|
3063 } |
|
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|
3064 |
|
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|
3065 // Verify other fields |
|
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3066 if (array_klasses() != NULL) { |
|
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3067 guarantee(array_klasses()->is_metadata(), "should be in metaspace"); |
|
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3068 guarantee(array_klasses()->is_klass(), "should be klass"); |
|
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3069 } |
|
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3070 if (constants() != NULL) { |
|
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3071 guarantee(constants()->is_metadata(), "should be in metaspace"); |
|
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3072 guarantee(constants()->is_constantPool(), "should be constant pool"); |
|
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3073 } |
|
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|
3074 if (protection_domain() != NULL) { |
|
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|
3075 guarantee(protection_domain()->is_oop(), "should be oop"); |
|
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3076 } |
|
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3077 if (host_klass() != NULL) { |
|
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|
3078 guarantee(host_klass()->is_metadata(), "should be in metaspace"); |
|
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3079 guarantee(host_klass()->is_klass(), "should be klass"); |
|
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|
3080 } |
|
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3081 if (signers() != NULL) { |
|
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3082 guarantee(signers()->is_objArray(), "should be obj array"); |
|
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3083 } |
|
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|
3084 } |
|
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|
3085 |
|
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3086 void InstanceKlass::oop_verify_on(oop obj, outputStream* st) { |
| 0 | 3087 Klass::oop_verify_on(obj, st); |
| 3088 VerifyFieldClosure blk; | |
|
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3089 obj->oop_iterate_no_header(&blk); |
| 0 | 3090 } |
| 3091 | |
|
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3092 |
|
113
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3093 // JNIid class for jfieldIDs only |
|
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|
3094 // Note to reviewers: |
|
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3095 // These JNI functions are just moved over to column 1 and not changed |
|
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3096 // in the compressed oops workspace. |
|
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3097 JNIid::JNIid(Klass* holder, int offset, JNIid* next) { |
|
113
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3098 _holder = holder; |
|
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3099 _offset = offset; |
|
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3100 _next = next; |
|
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3101 debug_only(_is_static_field_id = false;) |
|
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3102 } |
| 0 | 3103 |
| 3104 | |
|
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|
3105 JNIid* JNIid::find(int offset) { |
|
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|
3106 JNIid* current = this; |
|
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|
3107 while (current != NULL) { |
|
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|
3108 if (current->offset() == offset) return current; |
|
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|
3109 current = current->next(); |
|
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|
3110 } |
|
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|
3111 return NULL; |
|
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|
3112 } |
| 0 | 3113 |
| 3114 void JNIid::deallocate(JNIid* current) { | |
|
113
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|
3115 while (current != NULL) { |
|
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|
3116 JNIid* next = current->next(); |
|
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|
3117 delete current; |
|
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|
3118 current = next; |
|
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|
3119 } |
|
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|
3120 } |
| 0 | 3121 |
| 3122 | |
|
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3123 void JNIid::verify(Klass* holder) { |
|
6735
aed758eda82a
7195833: NPG: Rename instanceClassLoaderKlass, instanceRefKlass and instanceMirrorKlass
coleenp
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6733
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|
3124 int first_field_offset = InstanceMirrorKlass::offset_of_static_fields(); |
|
113
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|
3125 int end_field_offset; |
|
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3126 end_field_offset = first_field_offset + (InstanceKlass::cast(holder)->static_field_size() * wordSize); |
| 0 | 3127 |
|
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|
3128 JNIid* current = this; |
|
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|
3129 while (current != NULL) { |
|
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|
3130 guarantee(current->holder() == holder, "Invalid klass in JNIid"); |
|
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|
3131 #ifdef ASSERT |
|
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|
3132 int o = current->offset(); |
|
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|
3133 if (current->is_static_field_id()) { |
|
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|
3134 guarantee(o >= first_field_offset && o < end_field_offset, "Invalid static field offset in JNIid"); |
|
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|
3135 } |
|
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|
3136 #endif |
|
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|
3137 current = current->next(); |
|
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|
3138 } |
|
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|
3139 } |
| 0 | 3140 |
| 3141 | |
| 3142 #ifdef ASSERT | |
|
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|
3143 void InstanceKlass::set_init_state(ClassState state) { |
|
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|
3144 bool good_state = is_shared() ? (_init_state <= state) |
|
113
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|
3145 : (_init_state < state); |
|
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|
3146 assert(good_state || state == allocated, "illegal state transition"); |
|
4739
52b5d32fbfaf
7117052: instanceKlass::_init_state can be u1 type
coleenp
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|
3147 _init_state = (u1)state; |
|
113
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|
3148 } |
| 0 | 3149 #endif |
| 3150 | |
| 3151 | |
| 3152 // RedefineClasses() support for previous versions: | |
| 3153 | |
|
6725
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|
3154 // Purge previous versions |
|
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|
3155 static void purge_previous_versions_internal(InstanceKlass* ik, int emcp_method_count) { |
|
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|
3156 if (ik->previous_versions() != NULL) { |
|
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|
3157 // This klass has previous versions so see what we can cleanup |
|
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|
3158 // while it is safe to do so. |
|
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|
3159 |
|
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|
3160 int deleted_count = 0; // leave debugging breadcrumbs |
|
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|
3161 int live_count = 0; |
|
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|
3162 ClassLoaderData* loader_data = ik->class_loader_data() == NULL ? |
|
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|
3163 ClassLoaderData::the_null_class_loader_data() : |
|
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|
3164 ik->class_loader_data(); |
|
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|
3165 |
|
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|
3166 // RC_TRACE macro has an embedded ResourceMark |
|
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|
3167 RC_TRACE(0x00000200, ("purge: %s: previous version length=%d", |
|
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|
3168 ik->external_name(), ik->previous_versions()->length())); |
|
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|
3169 |
|
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|
3170 for (int i = ik->previous_versions()->length() - 1; i >= 0; i--) { |
|
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|
3171 // check the previous versions array |
|
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|
3172 PreviousVersionNode * pv_node = ik->previous_versions()->at(i); |
|
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|
3173 ConstantPool* cp_ref = pv_node->prev_constant_pool(); |
|
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|
3174 assert(cp_ref != NULL, "cp ref was unexpectedly cleared"); |
|
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|
3175 |
|
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|
3176 ConstantPool* pvcp = cp_ref; |
|
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|
3177 if (!pvcp->on_stack()) { |
|
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|
3178 // If the constant pool isn't on stack, none of the methods |
|
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|
3179 // are executing. Delete all the methods, the constant pool and |
|
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|
3180 // and this previous version node. |
|
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|
3181 GrowableArray<Method*>* method_refs = pv_node->prev_EMCP_methods(); |
|
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|
3182 if (method_refs != NULL) { |
|
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|
3183 for (int j = method_refs->length() - 1; j >= 0; j--) { |
|
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|
3184 Method* method = method_refs->at(j); |
|
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|
3185 assert(method != NULL, "method ref was unexpectedly cleared"); |
|
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|
3186 method_refs->remove_at(j); |
|
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|
3187 // method will be freed with associated class. |
|
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|
3188 } |
|
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|
3189 } |
|
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|
3190 // Remove the constant pool |
|
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|
3191 delete pv_node; |
|
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|
3192 // Since we are traversing the array backwards, we don't have to |
|
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|
3193 // do anything special with the index. |
|
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|
3194 ik->previous_versions()->remove_at(i); |
|
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|
3195 deleted_count++; |
|
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|
3196 continue; |
|
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|
3197 } else { |
|
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|
3198 RC_TRACE(0x00000200, ("purge: previous version @%d is alive", i)); |
|
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|
3199 assert(pvcp->pool_holder() != NULL, "Constant pool with no holder"); |
|
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|
3200 guarantee (!loader_data->is_unloading(), "unloaded classes can't be on the stack"); |
|
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|
3201 live_count++; |
|
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|
3202 } |
|
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|
3203 |
|
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|
3204 // At least one method is live in this previous version, clean out |
|
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|
3205 // the others or mark them as obsolete. |
|
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|
3206 GrowableArray<Method*>* method_refs = pv_node->prev_EMCP_methods(); |
|
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|
3207 if (method_refs != NULL) { |
|
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|
3208 RC_TRACE(0x00000200, ("purge: previous methods length=%d", |
|
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|
3209 method_refs->length())); |
|
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|
3210 for (int j = method_refs->length() - 1; j >= 0; j--) { |
|
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|
3211 Method* method = method_refs->at(j); |
|
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|
3212 assert(method != NULL, "method ref was unexpectedly cleared"); |
|
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|
3213 |
|
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|
3214 // Remove the emcp method if it's not executing |
|
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|
3215 // If it's been made obsolete by a redefinition of a non-emcp |
|
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3216 // method, mark it as obsolete but leave it to clean up later. |
|
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|
3217 if (!method->on_stack()) { |
|
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|
3218 method_refs->remove_at(j); |
|
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|
3219 } else if (emcp_method_count == 0) { |
|
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|
3220 method->set_is_obsolete(); |
|
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|
3221 } else { |
|
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|
3222 // RC_TRACE macro has an embedded ResourceMark |
|
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|
3223 RC_TRACE(0x00000200, |
|
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|
3224 ("purge: %s(%s): prev method @%d in version @%d is alive", |
|
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|
3225 method->name()->as_C_string(), |
|
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|
3226 method->signature()->as_C_string(), j, i)); |
|
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|
3227 } |
|
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|
3228 } |
|
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|
3229 } |
|
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|
3230 } |
|
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|
3231 assert(ik->previous_versions()->length() == live_count, "sanity check"); |
|
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|
3232 RC_TRACE(0x00000200, |
|
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|
3233 ("purge: previous version stats: live=%d, deleted=%d", live_count, |
|
da91efe96a93
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|
3234 deleted_count)); |
|
da91efe96a93
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|
3235 } |
|
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|
3236 } |
|
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|
3237 |
|
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|
3238 // External interface for use during class unloading. |
|
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|
3239 void InstanceKlass::purge_previous_versions(InstanceKlass* ik) { |
|
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|
3240 // Call with >0 emcp methods since they are not currently being redefined. |
|
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|
3241 purge_previous_versions_internal(ik, 1); |
|
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|
3242 } |
|
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|
3243 |
|
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|
3244 |
|
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|
3245 // Potentially add an information node that contains pointers to the |
| 0 | 3246 // interesting parts of the previous version of the_class. |
|
6725
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|
3247 // This is also where we clean out any unused references. |
|
977
74a5db69c1fe
6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents:
974
diff
changeset
|
3248 // Note that while we delete nodes from the _previous_versions |
|
74a5db69c1fe
6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents:
974
diff
changeset
|
3249 // array, we never delete the array itself until the klass is |
|
74a5db69c1fe
6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents:
974
diff
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|
3250 // unloaded. The has_been_redefined() query depends on that fact. |
|
74a5db69c1fe
6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents:
974
diff
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|
3251 // |
|
6725
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|
3252 void InstanceKlass::add_previous_version(instanceKlassHandle ikh, |
|
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
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52
diff
changeset
|
3253 BitMap* emcp_methods, int emcp_method_count) { |
| 0 | 3254 assert(Thread::current()->is_VM_thread(), |
|
113
ba764ed4b6f2
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diff
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|
3255 "only VMThread can add previous versions"); |
| 0 | 3256 |
| 3257 if (_previous_versions == NULL) { | |
| 3258 // This is the first previous version so make some space. | |
| 3259 // Start with 2 elements under the assumption that the class | |
| 3260 // won't be redefined much. | |
| 6197 | 3261 _previous_versions = new (ResourceObj::C_HEAP, mtClass) |
| 0 | 3262 GrowableArray<PreviousVersionNode *>(2, true); |
| 3263 } | |
| 3264 | |
|
6725
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|
3265 ConstantPool* cp_ref = ikh->constants(); |
|
da91efe96a93
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|
3266 |
| 0 | 3267 // RC_TRACE macro has an embedded ResourceMark |
|
6725
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|
3268 RC_TRACE(0x00000400, ("adding previous version ref for %s @%d, EMCP_cnt=%d " |
|
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|
3269 "on_stack=%d", |
|
da91efe96a93
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diff
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|
3270 ikh->external_name(), _previous_versions->length(), emcp_method_count, |
|
da91efe96a93
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|
3271 cp_ref->on_stack())); |
|
da91efe96a93
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|
3272 |
|
da91efe96a93
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|
3273 // If the constant pool for this previous version of the class |
|
da91efe96a93
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|
3274 // is not marked as being on the stack, then none of the methods |
|
da91efe96a93
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diff
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|
3275 // in this previous version of the class are on the stack so |
|
da91efe96a93
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|
3276 // we don't need to create a new PreviousVersionNode. However, |
|
da91efe96a93
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coleenp
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diff
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|
3277 // we still need to examine older previous versions below. |
|
da91efe96a93
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|
3278 Array<Method*>* old_methods = ikh->methods(); |
|
da91efe96a93
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diff
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|
3279 |
|
da91efe96a93
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diff
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|
3280 if (cp_ref->on_stack()) { |
| 0 | 3281 PreviousVersionNode * pv_node = NULL; |
| 3282 if (emcp_method_count == 0) { | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
3283 // non-shared ConstantPool gets a reference |
|
da91efe96a93
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coleenp
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diff
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|
3284 pv_node = new PreviousVersionNode(cp_ref, !cp_ref->is_shared(), NULL); |
| 0 | 3285 RC_TRACE(0x00000400, |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
3286 ("add: all methods are obsolete; flushing any EMCP refs")); |
| 0 | 3287 } else { |
| 3288 int local_count = 0; | |
|
6725
da91efe96a93
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coleenp
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|
3289 GrowableArray<Method*>* method_refs = new (ResourceObj::C_HEAP, mtClass) |
|
da91efe96a93
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coleenp
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diff
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|
3290 GrowableArray<Method*>(emcp_method_count, true); |
| 0 | 3291 for (int i = 0; i < old_methods->length(); i++) { |
| 3292 if (emcp_methods->at(i)) { | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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6266
diff
changeset
|
3293 // this old method is EMCP. Save it only if it's on the stack |
|
da91efe96a93
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|
3294 Method* old_method = old_methods->at(i); |
|
da91efe96a93
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diff
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|
3295 if (old_method->on_stack()) { |
|
da91efe96a93
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diff
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|
3296 method_refs->append(old_method); |
|
da91efe96a93
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6266
diff
changeset
|
3297 } |
| 0 | 3298 if (++local_count >= emcp_method_count) { |
| 3299 // no more EMCP methods so bail out now | |
| 3300 break; | |
| 3301 } | |
| 3302 } | |
| 3303 } | |
|
6725
da91efe96a93
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coleenp
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6266
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|
3304 // non-shared ConstantPool gets a reference |
|
da91efe96a93
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|
3305 pv_node = new PreviousVersionNode(cp_ref, !cp_ref->is_shared(), method_refs); |
|
da91efe96a93
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coleenp
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|
3306 } |
|
da91efe96a93
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diff
changeset
|
3307 // append new previous version. |
| 0 | 3308 _previous_versions->append(pv_node); |
|
6725
da91efe96a93
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6266
diff
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|
3309 } |
|
da91efe96a93
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6266
diff
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|
3310 |
|
da91efe96a93
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6266
diff
changeset
|
3311 // Since the caller is the VMThread and we are at a safepoint, this |
|
da91efe96a93
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coleenp
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6266
diff
changeset
|
3312 // is a good time to clear out unused references. |
| 0 | 3313 |
| 3314 RC_TRACE(0x00000400, ("add: previous version length=%d", | |
| 3315 _previous_versions->length())); | |
| 3316 | |
|
6725
da91efe96a93
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changeset
|
3317 // Purge previous versions not executing on the stack |
|
da91efe96a93
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6266
diff
changeset
|
3318 purge_previous_versions_internal(this, emcp_method_count); |
| 0 | 3319 |
| 3320 int obsolete_method_count = old_methods->length() - emcp_method_count; | |
| 3321 | |
| 3322 if (emcp_method_count != 0 && obsolete_method_count != 0 && | |
|
6725
da91efe96a93
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coleenp
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6266
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changeset
|
3323 _previous_versions->length() > 0) { |
|
da91efe96a93
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coleenp
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diff
changeset
|
3324 // We have a mix of obsolete and EMCP methods so we have to |
| 0 | 3325 // clear out any matching EMCP method entries the hard way. |
| 3326 int local_count = 0; | |
| 3327 for (int i = 0; i < old_methods->length(); i++) { | |
| 3328 if (!emcp_methods->at(i)) { | |
| 3329 // only obsolete methods are interesting | |
|
6725
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6266
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|
3330 Method* old_method = old_methods->at(i); |
|
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
3331 Symbol* m_name = old_method->name(); |
|
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
3332 Symbol* m_signature = old_method->signature(); |
| 0 | 3333 |
|
6725
da91efe96a93
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coleenp
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6266
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|
3334 // we might not have added the last entry |
|
da91efe96a93
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coleenp
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6266
diff
changeset
|
3335 for (int j = _previous_versions->length() - 1; j >= 0; j--) { |
|
da91efe96a93
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coleenp
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diff
changeset
|
3336 // check the previous versions array for non executing obsolete methods |
|
da91efe96a93
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diff
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|
3337 PreviousVersionNode * pv_node = _previous_versions->at(j); |
|
da91efe96a93
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6266
diff
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|
3338 |
|
da91efe96a93
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diff
changeset
|
3339 GrowableArray<Method*>* method_refs = pv_node->prev_EMCP_methods(); |
| 0 | 3340 if (method_refs == NULL) { |
| 3341 // We have run into a PreviousVersion generation where | |
| 3342 // all methods were made obsolete during that generation's | |
| 3343 // RedefineClasses() operation. At the time of that | |
| 3344 // operation, all EMCP methods were flushed so we don't | |
| 3345 // have to go back any further. | |
| 3346 // | |
| 3347 // A NULL method_refs is different than an empty method_refs. | |
| 3348 // We cannot infer any optimizations about older generations | |
| 3349 // from an empty method_refs for the current generation. | |
| 3350 break; | |
| 3351 } | |
| 3352 | |
| 3353 for (int k = method_refs->length() - 1; k >= 0; k--) { | |
|
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3354 Method* method = method_refs->at(k); |
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3355 |
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3356 if (!method->is_obsolete() && |
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3357 method->name() == m_name && |
| 0 | 3358 method->signature() == m_signature) { |
| 3359 // The current RedefineClasses() call has made all EMCP | |
| 3360 // versions of this method obsolete so mark it as obsolete | |
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3361 // and remove the reference. |
| 0 | 3362 RC_TRACE(0x00000400, |
| 3363 ("add: %s(%s): flush obsolete method @%d in version @%d", | |
| 3364 m_name->as_C_string(), m_signature->as_C_string(), k, j)); | |
| 3365 | |
| 3366 method->set_is_obsolete(); | |
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3367 // Leave obsolete methods on the previous version list to |
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3368 // clean up later. |
| 0 | 3369 break; |
| 3370 } | |
| 3371 } | |
| 3372 | |
| 3373 // The previous loop may not find a matching EMCP method, but | |
| 3374 // that doesn't mean that we can optimize and not go any | |
| 3375 // further back in the PreviousVersion generations. The EMCP | |
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3376 // method for this generation could have already been deleted, |
| 0 | 3377 // but there still may be an older EMCP method that has not |
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3378 // been deleted. |
| 0 | 3379 } |
| 3380 | |
| 3381 if (++local_count >= obsolete_method_count) { | |
| 3382 // no more obsolete methods so bail out now | |
| 3383 break; | |
| 3384 } | |
| 3385 } | |
| 3386 } | |
| 3387 } | |
| 3388 } // end add_previous_version() | |
| 3389 | |
| 3390 | |
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3391 // Determine if InstanceKlass has a previous version. |
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3392 bool InstanceKlass::has_previous_version() const { |
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3393 return (_previous_versions != NULL && _previous_versions->length() > 0); |
| 0 | 3394 } // end has_previous_version() |
| 3395 | |
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3396 |
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3397 Method* InstanceKlass::method_with_idnum(int idnum) { |
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3398 Method* m = NULL; |
| 0 | 3399 if (idnum < methods()->length()) { |
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3400 m = methods()->at(idnum); |
| 0 | 3401 } |
| 3402 if (m == NULL || m->method_idnum() != idnum) { | |
| 3403 for (int index = 0; index < methods()->length(); ++index) { | |
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3404 m = methods()->at(index); |
| 0 | 3405 if (m->method_idnum() == idnum) { |
| 3406 return m; | |
| 3407 } | |
| 3408 } | |
| 3409 } | |
| 3410 return m; | |
| 3411 } | |
| 3412 | |
| 3413 | |
| 3414 // Construct a PreviousVersionNode entry for the array hung off | |
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3415 // the InstanceKlass. |
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3416 PreviousVersionNode::PreviousVersionNode(ConstantPool* prev_constant_pool, |
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3417 bool prev_cp_is_weak, GrowableArray<Method*>* prev_EMCP_methods) { |
| 0 | 3418 |
| 3419 _prev_constant_pool = prev_constant_pool; | |
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3420 _prev_cp_is_weak = prev_cp_is_weak; |
| 0 | 3421 _prev_EMCP_methods = prev_EMCP_methods; |
| 3422 } | |
| 3423 | |
| 3424 | |
| 3425 // Destroy a PreviousVersionNode | |
| 3426 PreviousVersionNode::~PreviousVersionNode() { | |
| 3427 if (_prev_constant_pool != NULL) { | |
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3428 _prev_constant_pool = NULL; |
| 0 | 3429 } |
| 3430 | |
| 3431 if (_prev_EMCP_methods != NULL) { | |
| 3432 delete _prev_EMCP_methods; | |
| 3433 } | |
| 3434 } | |
| 3435 | |
| 3436 | |
| 3437 // Construct a PreviousVersionInfo entry | |
| 3438 PreviousVersionInfo::PreviousVersionInfo(PreviousVersionNode *pv_node) { | |
| 3439 _prev_constant_pool_handle = constantPoolHandle(); // NULL handle | |
| 3440 _prev_EMCP_method_handles = NULL; | |
| 3441 | |
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3442 ConstantPool* cp = pv_node->prev_constant_pool(); |
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3443 assert(cp != NULL, "constant pool ref was unexpectedly cleared"); |
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3444 if (cp == NULL) { |
| 0 | 3445 return; // robustness |
| 3446 } | |
| 3447 | |
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3448 // make the ConstantPool* safe to return |
| 0 | 3449 _prev_constant_pool_handle = constantPoolHandle(cp); |
| 3450 | |
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3451 GrowableArray<Method*>* method_refs = pv_node->prev_EMCP_methods(); |
| 0 | 3452 if (method_refs == NULL) { |
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3453 // the InstanceKlass did not have any EMCP methods |
| 0 | 3454 return; |
| 3455 } | |
| 3456 | |
| 3457 _prev_EMCP_method_handles = new GrowableArray<methodHandle>(10); | |
| 3458 | |
| 3459 int n_methods = method_refs->length(); | |
| 3460 for (int i = 0; i < n_methods; i++) { | |
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3461 Method* method = method_refs->at(i); |
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3462 assert (method != NULL, "method has been cleared"); |
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3463 if (method == NULL) { |
| 0 | 3464 continue; // robustness |
| 3465 } | |
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3466 // make the Method* safe to return |
| 0 | 3467 _prev_EMCP_method_handles->append(methodHandle(method)); |
| 3468 } | |
| 3469 } | |
| 3470 | |
| 3471 | |
| 3472 // Destroy a PreviousVersionInfo | |
| 3473 PreviousVersionInfo::~PreviousVersionInfo() { | |
| 3474 // Since _prev_EMCP_method_handles is not C-heap allocated, we | |
| 3475 // don't have to delete it. | |
| 3476 } | |
| 3477 | |
| 3478 | |
| 3479 // Construct a helper for walking the previous versions array | |
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3480 PreviousVersionWalker::PreviousVersionWalker(InstanceKlass *ik) { |
| 0 | 3481 _previous_versions = ik->previous_versions(); |
| 3482 _current_index = 0; | |
| 3483 // _hm needs no initialization | |
| 3484 _current_p = NULL; | |
| 3485 } | |
| 3486 | |
| 3487 | |
| 3488 // Destroy a PreviousVersionWalker | |
| 3489 PreviousVersionWalker::~PreviousVersionWalker() { | |
| 3490 // Delete the current info just in case the caller didn't walk to | |
| 3491 // the end of the previous versions list. No harm if _current_p is | |
| 3492 // already NULL. | |
| 3493 delete _current_p; | |
| 3494 | |
| 3495 // When _hm is destroyed, all the Handles returned in | |
| 3496 // PreviousVersionInfo objects will be destroyed. | |
| 3497 // Also, after this destructor is finished it will be | |
| 3498 // safe to delete the GrowableArray allocated in the | |
| 3499 // PreviousVersionInfo objects. | |
| 3500 } | |
| 3501 | |
| 3502 | |
| 3503 // Return the interesting information for the next previous version | |
| 3504 // of the klass. Returns NULL if there are no more previous versions. | |
| 3505 PreviousVersionInfo* PreviousVersionWalker::next_previous_version() { | |
| 3506 if (_previous_versions == NULL) { | |
| 3507 // no previous versions so nothing to return | |
| 3508 return NULL; | |
| 3509 } | |
| 3510 | |
| 3511 delete _current_p; // cleanup the previous info for the caller | |
| 3512 _current_p = NULL; // reset to NULL so we don't delete same object twice | |
| 3513 | |
| 3514 int length = _previous_versions->length(); | |
| 3515 | |
| 3516 while (_current_index < length) { | |
| 3517 PreviousVersionNode * pv_node = _previous_versions->at(_current_index++); | |
| 6197 | 3518 PreviousVersionInfo * pv_info = new (ResourceObj::C_HEAP, mtClass) |
| 0 | 3519 PreviousVersionInfo(pv_node); |
| 3520 | |
| 3521 constantPoolHandle cp_h = pv_info->prev_constant_pool_handle(); | |
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3522 assert (!cp_h.is_null(), "null cp found in previous version"); |
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3523 |
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3524 // The caller will need to delete pv_info when they are done with it. |
| 0 | 3525 _current_p = pv_info; |
| 3526 return pv_info; | |
| 3527 } | |
| 3528 | |
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3529 // all of the underlying nodes' info has been deleted |
| 0 | 3530 return NULL; |
| 3531 } // end next_previous_version() |