Mercurial > hg > graal-compiler
annotate src/share/vm/oops/instanceKlass.cpp @ 8124:5fc51c1ecdeb
Merge.
| author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
|---|---|
| date | Tue, 05 Mar 2013 23:44:54 +0100 |
| parents | 3ac7d10a6572 927a311d00f9 |
| children | b9a918201d47 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 7956 | 2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "classfile/javaClasses.hpp" | |
| 27 #include "classfile/systemDictionary.hpp" | |
| 28 #include "classfile/verifier.hpp" | |
| 29 #include "classfile/vmSymbols.hpp" | |
| 30 #include "compiler/compileBroker.hpp" | |
| 31 #include "gc_implementation/shared/markSweep.inline.hpp" | |
| 32 #include "gc_interface/collectedHeap.inline.hpp" | |
| 33 #include "interpreter/oopMapCache.hpp" | |
| 34 #include "interpreter/rewriter.hpp" | |
| 35 #include "jvmtifiles/jvmti.h" | |
| 36 #include "memory/genOopClosures.inline.hpp" | |
| 7956 | 37 #include "memory/heapInspection.hpp" |
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38 #include "memory/metadataFactory.hpp" |
| 1972 | 39 #include "memory/oopFactory.hpp" |
| 3938 | 40 #include "oops/fieldStreams.hpp" |
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41 #include "oops/instanceClassLoaderKlass.hpp" |
| 1972 | 42 #include "oops/instanceKlass.hpp" |
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43 #include "oops/instanceMirrorKlass.hpp" |
| 1972 | 44 #include "oops/instanceOop.hpp" |
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45 #include "oops/klass.inline.hpp" |
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46 #include "oops/method.hpp" |
| 1972 | 47 #include "oops/oop.inline.hpp" |
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48 #include "oops/symbol.hpp" |
| 1972 | 49 #include "prims/jvmtiExport.hpp" |
| 50 #include "prims/jvmtiRedefineClassesTrace.hpp" | |
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51 #include "prims/methodComparator.hpp" |
| 1972 | 52 #include "runtime/fieldDescriptor.hpp" |
| 53 #include "runtime/handles.inline.hpp" | |
| 54 #include "runtime/javaCalls.hpp" | |
| 55 #include "runtime/mutexLocker.hpp" | |
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56 #include "runtime/thread.inline.hpp" |
| 1972 | 57 #include "services/threadService.hpp" |
| 58 #include "utilities/dtrace.hpp" | |
|
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59 #include "utilities/macros.hpp" |
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60 #if INCLUDE_ALL_GCS |
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61 #include "gc_implementation/concurrentMarkSweep/cmsOopClosures.inline.hpp" |
| 1972 | 62 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" |
| 63 #include "gc_implementation/g1/g1OopClosures.inline.hpp" | |
| 64 #include "gc_implementation/g1/g1RemSet.inline.hpp" | |
| 65 #include "gc_implementation/g1/heapRegionSeq.inline.hpp" | |
| 66 #include "gc_implementation/parNew/parOopClosures.inline.hpp" | |
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67 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.inline.hpp" |
| 1972 | 68 #include "gc_implementation/parallelScavenge/psPromotionManager.inline.hpp" |
| 69 #include "gc_implementation/parallelScavenge/psScavenge.inline.hpp" | |
| 70 #include "oops/oop.pcgc.inline.hpp" | |
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71 #endif // INCLUDE_ALL_GCS |
| 1972 | 72 #ifdef COMPILER1 |
| 73 #include "c1/c1_Compiler.hpp" | |
| 74 #endif | |
| 0 | 75 |
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76 #ifdef DTRACE_ENABLED |
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77 |
| 4006 | 78 #ifndef USDT2 |
| 79 | |
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80 HS_DTRACE_PROBE_DECL4(hotspot, class__initialization__required, |
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81 char*, intptr_t, oop, intptr_t); |
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82 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__recursive, |
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83 char*, intptr_t, oop, intptr_t, int); |
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84 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__concurrent, |
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85 char*, intptr_t, oop, intptr_t, int); |
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86 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__erroneous, |
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87 char*, intptr_t, oop, intptr_t, int); |
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88 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__super__failed, |
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89 char*, intptr_t, oop, intptr_t, int); |
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90 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__clinit, |
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91 char*, intptr_t, oop, intptr_t, int); |
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92 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__error, |
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93 char*, intptr_t, oop, intptr_t, int); |
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94 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__end, |
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95 char*, intptr_t, oop, intptr_t, int); |
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96 |
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97 #define DTRACE_CLASSINIT_PROBE(type, clss, thread_type) \ |
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98 { \ |
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99 char* data = NULL; \ |
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100 int len = 0; \ |
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101 Symbol* name = (clss)->name(); \ |
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102 if (name != NULL) { \ |
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103 data = (char*)name->bytes(); \ |
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104 len = name->utf8_length(); \ |
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105 } \ |
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106 HS_DTRACE_PROBE4(hotspot, class__initialization__##type, \ |
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107 data, len, (clss)->class_loader(), thread_type); \ |
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108 } |
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109 |
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110 #define DTRACE_CLASSINIT_PROBE_WAIT(type, clss, thread_type, wait) \ |
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111 { \ |
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112 char* data = NULL; \ |
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113 int len = 0; \ |
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114 Symbol* name = (clss)->name(); \ |
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115 if (name != NULL) { \ |
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116 data = (char*)name->bytes(); \ |
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117 len = name->utf8_length(); \ |
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118 } \ |
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119 HS_DTRACE_PROBE5(hotspot, class__initialization__##type, \ |
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120 data, len, (clss)->class_loader(), thread_type, wait); \ |
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121 } |
| 4006 | 122 #else /* USDT2 */ |
| 123 | |
| 124 #define HOTSPOT_CLASS_INITIALIZATION_required HOTSPOT_CLASS_INITIALIZATION_REQUIRED | |
| 125 #define HOTSPOT_CLASS_INITIALIZATION_recursive HOTSPOT_CLASS_INITIALIZATION_RECURSIVE | |
| 126 #define HOTSPOT_CLASS_INITIALIZATION_concurrent HOTSPOT_CLASS_INITIALIZATION_CONCURRENT | |
| 127 #define HOTSPOT_CLASS_INITIALIZATION_erroneous HOTSPOT_CLASS_INITIALIZATION_ERRONEOUS | |
| 128 #define HOTSPOT_CLASS_INITIALIZATION_super__failed HOTSPOT_CLASS_INITIALIZATION_SUPER_FAILED | |
| 129 #define HOTSPOT_CLASS_INITIALIZATION_clinit HOTSPOT_CLASS_INITIALIZATION_CLINIT | |
| 130 #define HOTSPOT_CLASS_INITIALIZATION_error HOTSPOT_CLASS_INITIALIZATION_ERROR | |
| 131 #define HOTSPOT_CLASS_INITIALIZATION_end HOTSPOT_CLASS_INITIALIZATION_END | |
| 132 #define DTRACE_CLASSINIT_PROBE(type, clss, thread_type) \ | |
| 133 { \ | |
| 134 char* data = NULL; \ | |
| 135 int len = 0; \ | |
| 136 Symbol* name = (clss)->name(); \ | |
| 137 if (name != NULL) { \ | |
| 138 data = (char*)name->bytes(); \ | |
| 139 len = name->utf8_length(); \ | |
| 140 } \ | |
| 141 HOTSPOT_CLASS_INITIALIZATION_##type( \ | |
| 142 data, len, (clss)->class_loader(), thread_type); \ | |
| 143 } | |
| 144 | |
| 145 #define DTRACE_CLASSINIT_PROBE_WAIT(type, clss, thread_type, wait) \ | |
| 146 { \ | |
| 147 char* data = NULL; \ | |
| 148 int len = 0; \ | |
| 149 Symbol* name = (clss)->name(); \ | |
| 150 if (name != NULL) { \ | |
| 151 data = (char*)name->bytes(); \ | |
| 152 len = name->utf8_length(); \ | |
| 153 } \ | |
| 154 HOTSPOT_CLASS_INITIALIZATION_##type( \ | |
| 155 data, len, (clss)->class_loader(), thread_type, wait); \ | |
| 156 } | |
| 157 #endif /* USDT2 */ | |
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158 |
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159 #else // ndef DTRACE_ENABLED |
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160 |
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161 #define DTRACE_CLASSINIT_PROBE(type, clss, thread_type) |
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162 #define DTRACE_CLASSINIT_PROBE_WAIT(type, clss, thread_type, wait) |
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163 |
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164 #endif // ndef DTRACE_ENABLED |
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165 |
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166 volatile int InstanceKlass::_total_instanceKlass_count = 0; |
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167 |
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168 Klass* InstanceKlass::allocate_instance_klass(ClassLoaderData* loader_data, |
| 8031 | 169 int vtable_len, |
| 170 int itable_len, | |
| 171 int static_field_size, | |
| 172 int nonstatic_oop_map_size, | |
| 173 ReferenceType rt, | |
| 174 AccessFlags access_flags, | |
| 175 Symbol* name, | |
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176 Klass* super_klass, |
| 8031 | 177 bool is_anonymous, |
| 178 TRAPS) { | |
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179 |
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180 int size = InstanceKlass::size(vtable_len, itable_len, nonstatic_oop_map_size, |
| 8031 | 181 access_flags.is_interface(), is_anonymous); |
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182 |
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183 // Allocation |
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184 InstanceKlass* ik; |
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185 if (rt == REF_NONE) { |
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186 if (name == vmSymbols::java_lang_Class()) { |
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187 ik = new (loader_data, size, THREAD) InstanceMirrorKlass( |
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188 vtable_len, itable_len, static_field_size, nonstatic_oop_map_size, rt, |
| 8031 | 189 access_flags, is_anonymous); |
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190 } else if (name == vmSymbols::java_lang_ClassLoader() || |
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191 (SystemDictionary::ClassLoader_klass_loaded() && |
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192 super_klass != NULL && |
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193 super_klass->is_subtype_of(SystemDictionary::ClassLoader_klass()))) { |
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194 ik = new (loader_data, size, THREAD) InstanceClassLoaderKlass( |
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195 vtable_len, itable_len, static_field_size, nonstatic_oop_map_size, rt, |
| 8031 | 196 access_flags, is_anonymous); |
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197 } else { |
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198 // normal class |
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199 ik = new (loader_data, size, THREAD) InstanceKlass( |
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200 vtable_len, itable_len, static_field_size, nonstatic_oop_map_size, rt, |
| 8031 | 201 access_flags, is_anonymous); |
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202 } |
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203 } else { |
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204 // reference klass |
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205 ik = new (loader_data, size, THREAD) InstanceRefKlass( |
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206 vtable_len, itable_len, static_field_size, nonstatic_oop_map_size, rt, |
| 8031 | 207 access_flags, is_anonymous); |
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208 } |
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209 |
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210 Atomic::inc(&_total_instanceKlass_count); |
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211 return ik; |
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212 } |
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213 |
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214 InstanceKlass::InstanceKlass(int vtable_len, |
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215 int itable_len, |
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216 int static_field_size, |
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217 int nonstatic_oop_map_size, |
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218 ReferenceType rt, |
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219 AccessFlags access_flags, |
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220 bool is_anonymous) { |
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221 No_Safepoint_Verifier no_safepoint; // until k becomes parsable |
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222 |
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223 int size = InstanceKlass::size(vtable_len, itable_len, nonstatic_oop_map_size, |
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224 access_flags.is_interface(), is_anonymous); |
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225 |
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226 // The sizes of these these three variables are used for determining the |
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227 // size of the instanceKlassOop. It is critical that these are set to the right |
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228 // sizes before the first GC, i.e., when we allocate the mirror. |
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229 this->set_vtable_length(vtable_len); |
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230 this->set_itable_length(itable_len); |
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231 this->set_static_field_size(static_field_size); |
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232 this->set_nonstatic_oop_map_size(nonstatic_oop_map_size); |
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233 this->set_access_flags(access_flags); |
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234 this->set_is_anonymous(is_anonymous); |
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235 assert(this->size() == size, "wrong size for object"); |
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236 |
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237 this->set_array_klasses(NULL); |
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238 this->set_methods(NULL); |
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239 this->set_method_ordering(NULL); |
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240 this->set_local_interfaces(NULL); |
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241 this->set_transitive_interfaces(NULL); |
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242 this->init_implementor(); |
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243 this->set_fields(NULL, 0); |
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244 this->set_constants(NULL); |
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245 this->set_class_loader_data(NULL); |
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246 this->set_protection_domain(NULL); |
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247 this->set_signers(NULL); |
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248 this->set_source_file_name(NULL); |
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249 this->set_source_debug_extension(NULL, 0); |
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250 this->set_array_name(NULL); |
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251 this->set_inner_classes(NULL); |
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252 this->set_static_oop_field_count(0); |
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253 this->set_nonstatic_field_size(0); |
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254 this->set_is_marked_dependent(false); |
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255 this->set_init_state(InstanceKlass::allocated); |
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256 this->set_init_thread(NULL); |
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257 this->set_init_lock(NULL); |
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258 this->set_reference_type(rt); |
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259 this->set_oop_map_cache(NULL); |
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260 this->set_jni_ids(NULL); |
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261 this->set_osr_nmethods_head(NULL); |
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262 this->set_breakpoints(NULL); |
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263 this->init_previous_versions(); |
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264 this->set_generic_signature(NULL); |
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265 this->release_set_methods_jmethod_ids(NULL); |
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266 this->release_set_methods_cached_itable_indices(NULL); |
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267 this->set_annotations(NULL); |
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268 this->set_jvmti_cached_class_field_map(NULL); |
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269 this->set_initial_method_idnum(0); |
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270 |
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271 // initialize the non-header words to zero |
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272 intptr_t* p = (intptr_t*)this; |
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273 for (int index = InstanceKlass::header_size(); index < size; index++) { |
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274 p[index] = NULL_WORD; |
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275 } |
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276 |
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277 // Set temporary value until parseClassFile updates it with the real instance |
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278 // size. |
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279 this->set_layout_helper(Klass::instance_layout_helper(0, true)); |
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280 } |
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281 |
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282 |
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283 // This function deallocates the metadata and C heap pointers that the |
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284 // InstanceKlass points to. |
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285 void InstanceKlass::deallocate_contents(ClassLoaderData* loader_data) { |
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286 |
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287 // Orphan the mirror first, CMS thinks it's still live. |
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288 java_lang_Class::set_klass(java_mirror(), NULL); |
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289 |
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290 // Need to take this class off the class loader data list. |
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291 loader_data->remove_class(this); |
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292 |
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293 // The array_klass for this class is created later, after error handling. |
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294 // For class redefinition, we keep the original class so this scratch class |
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295 // doesn't have an array class. Either way, assert that there is nothing |
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296 // to deallocate. |
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297 assert(array_klasses() == NULL, "array classes shouldn't be created for this class yet"); |
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298 |
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299 // Release C heap allocated data that this might point to, which includes |
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300 // reference counting symbol names. |
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301 release_C_heap_structures(); |
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302 |
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303 Array<Method*>* ms = methods(); |
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304 if (ms != Universe::the_empty_method_array()) { |
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305 for (int i = 0; i <= methods()->length() -1 ; i++) { |
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306 Method* method = methods()->at(i); |
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307 // Only want to delete methods that are not executing for RedefineClasses. |
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308 // The previous version will point to them so they're not totally dangling |
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309 assert (!method->on_stack(), "shouldn't be called with methods on stack"); |
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310 MetadataFactory::free_metadata(loader_data, method); |
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311 } |
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312 MetadataFactory::free_array<Method*>(loader_data, methods()); |
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313 } |
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314 set_methods(NULL); |
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315 |
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316 if (method_ordering() != Universe::the_empty_int_array()) { |
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317 MetadataFactory::free_array<int>(loader_data, method_ordering()); |
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318 } |
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319 set_method_ordering(NULL); |
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320 |
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321 // This array is in Klass, but remove it with the InstanceKlass since |
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322 // this place would be the only caller and it can share memory with transitive |
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323 // interfaces. |
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324 if (secondary_supers() != Universe::the_empty_klass_array() && |
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325 secondary_supers() != transitive_interfaces()) { |
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326 MetadataFactory::free_array<Klass*>(loader_data, secondary_supers()); |
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327 } |
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328 set_secondary_supers(NULL); |
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329 |
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330 // Only deallocate transitive interfaces if not empty, same as super class |
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331 // or same as local interfaces. See code in parseClassFile. |
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332 Array<Klass*>* ti = transitive_interfaces(); |
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333 if (ti != Universe::the_empty_klass_array() && ti != local_interfaces()) { |
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334 // check that the interfaces don't come from super class |
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335 Array<Klass*>* sti = (super() == NULL) ? NULL : |
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336 InstanceKlass::cast(super())->transitive_interfaces(); |
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337 if (ti != sti) { |
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338 MetadataFactory::free_array<Klass*>(loader_data, ti); |
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339 } |
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340 } |
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341 set_transitive_interfaces(NULL); |
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342 |
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343 // local interfaces can be empty |
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344 Array<Klass*>* li = local_interfaces(); |
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345 if (li != Universe::the_empty_klass_array()) { |
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346 MetadataFactory::free_array<Klass*>(loader_data, li); |
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347 } |
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348 set_local_interfaces(NULL); |
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349 |
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350 MetadataFactory::free_array<jushort>(loader_data, fields()); |
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351 set_fields(NULL, 0); |
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352 |
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353 // If a method from a redefined class is using this constant pool, don't |
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354 // delete it, yet. The new class's previous version will point to this. |
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355 assert (!constants()->on_stack(), "shouldn't be called if anything is onstack"); |
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356 MetadataFactory::free_metadata(loader_data, constants()); |
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357 set_constants(NULL); |
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358 |
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359 if (inner_classes() != Universe::the_empty_short_array()) { |
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360 MetadataFactory::free_array<jushort>(loader_data, inner_classes()); |
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361 } |
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362 set_inner_classes(NULL); |
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363 |
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364 // Null out Java heap objects, although these won't be walked to keep |
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365 // alive once this InstanceKlass is deallocated. |
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366 set_protection_domain(NULL); |
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367 set_signers(NULL); |
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368 set_init_lock(NULL); |
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369 |
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370 // We should deallocate the Annotations instance |
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371 MetadataFactory::free_metadata(loader_data, annotations()); |
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372 set_annotations(NULL); |
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373 } |
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374 |
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375 volatile oop InstanceKlass::init_lock() const { |
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376 volatile oop lock = _init_lock; // read once |
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377 assert((oop)lock != NULL || !is_not_initialized(), // initialized or in_error state |
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378 "only fully initialized state can have a null lock"); |
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379 return lock; |
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380 } |
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381 |
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382 // Set the initialization lock to null so the object can be GC'ed. Any racing |
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383 // threads to get this lock will see a null lock and will not lock. |
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384 // That's okay because they all check for initialized state after getting |
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385 // the lock and return. |
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386 void InstanceKlass::fence_and_clear_init_lock() { |
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387 // make sure previous stores are all done, notably the init_state. |
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388 OrderAccess::storestore(); |
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389 klass_oop_store(&_init_lock, NULL); |
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390 assert(!is_not_initialized(), "class must be initialized now"); |
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391 } |
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392 |
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393 |
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394 bool InstanceKlass::should_be_initialized() const { |
| 0 | 395 return !is_initialized(); |
| 396 } | |
| 397 | |
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398 klassVtable* InstanceKlass::vtable() const { |
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399 return new klassVtable(this, start_of_vtable(), vtable_length() / vtableEntry::size()); |
| 0 | 400 } |
| 401 | |
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402 klassItable* InstanceKlass::itable() const { |
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403 return new klassItable(instanceKlassHandle(this)); |
| 0 | 404 } |
| 405 | |
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406 void InstanceKlass::eager_initialize(Thread *thread) { |
| 0 | 407 if (!EagerInitialization) return; |
| 408 | |
| 409 if (this->is_not_initialized()) { | |
| 410 // abort if the the class has a class initializer | |
| 411 if (this->class_initializer() != NULL) return; | |
| 412 | |
| 413 // abort if it is java.lang.Object (initialization is handled in genesis) | |
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414 Klass* super = this->super(); |
| 0 | 415 if (super == NULL) return; |
| 416 | |
| 417 // abort if the super class should be initialized | |
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418 if (!InstanceKlass::cast(super)->is_initialized()) return; |
| 0 | 419 |
| 420 // call body to expose the this pointer | |
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421 instanceKlassHandle this_oop(thread, this); |
| 0 | 422 eager_initialize_impl(this_oop); |
| 423 } | |
| 424 } | |
| 425 | |
| 426 | |
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427 void InstanceKlass::eager_initialize_impl(instanceKlassHandle this_oop) { |
| 0 | 428 EXCEPTION_MARK; |
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429 volatile oop init_lock = this_oop->init_lock(); |
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430 ObjectLocker ol(init_lock, THREAD, init_lock != NULL); |
| 0 | 431 |
| 432 // abort if someone beat us to the initialization | |
| 433 if (!this_oop->is_not_initialized()) return; // note: not equivalent to is_initialized() | |
| 434 | |
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435 ClassState old_state = this_oop->init_state(); |
| 0 | 436 link_class_impl(this_oop, true, THREAD); |
| 437 if (HAS_PENDING_EXCEPTION) { | |
| 438 CLEAR_PENDING_EXCEPTION; | |
| 439 // Abort if linking the class throws an exception. | |
| 440 | |
| 441 // Use a test to avoid redundantly resetting the state if there's | |
| 442 // no change. Set_init_state() asserts that state changes make | |
| 443 // progress, whereas here we might just be spinning in place. | |
| 444 if( old_state != this_oop->_init_state ) | |
| 445 this_oop->set_init_state (old_state); | |
| 446 } else { | |
| 447 // linking successfull, mark class as initialized | |
| 448 this_oop->set_init_state (fully_initialized); | |
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449 this_oop->fence_and_clear_init_lock(); |
| 0 | 450 // trace |
| 451 if (TraceClassInitialization) { | |
| 452 ResourceMark rm(THREAD); | |
| 453 tty->print_cr("[Initialized %s without side effects]", this_oop->external_name()); | |
| 454 } | |
| 455 } | |
| 456 } | |
| 457 | |
| 458 | |
| 459 // See "The Virtual Machine Specification" section 2.16.5 for a detailed explanation of the class initialization | |
| 460 // process. The step comments refers to the procedure described in that section. | |
| 461 // Note: implementation moved to static method to expose the this pointer. | |
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462 void InstanceKlass::initialize(TRAPS) { |
| 0 | 463 if (this->should_be_initialized()) { |
| 464 HandleMark hm(THREAD); | |
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465 instanceKlassHandle this_oop(THREAD, this); |
| 0 | 466 initialize_impl(this_oop, CHECK); |
| 467 // Note: at this point the class may be initialized | |
| 468 // OR it may be in the state of being initialized | |
| 469 // in case of recursive initialization! | |
| 470 } else { | |
| 471 assert(is_initialized(), "sanity check"); | |
| 472 } | |
| 473 } | |
| 474 | |
| 475 | |
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476 bool InstanceKlass::verify_code( |
| 0 | 477 instanceKlassHandle this_oop, bool throw_verifyerror, TRAPS) { |
| 478 // 1) Verify the bytecodes | |
| 479 Verifier::Mode mode = | |
| 480 throw_verifyerror ? Verifier::ThrowException : Verifier::NoException; | |
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481 return Verifier::verify(this_oop, mode, this_oop->should_verify_class(), CHECK_false); |
| 0 | 482 } |
| 483 | |
| 484 | |
| 485 // Used exclusively by the shared spaces dump mechanism to prevent | |
| 486 // classes mapped into the shared regions in new VMs from appearing linked. | |
| 487 | |
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488 void InstanceKlass::unlink_class() { |
| 0 | 489 assert(is_linked(), "must be linked"); |
| 490 _init_state = loaded; | |
| 491 } | |
| 492 | |
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493 void InstanceKlass::link_class(TRAPS) { |
| 0 | 494 assert(is_loaded(), "must be loaded"); |
| 495 if (!is_linked()) { | |
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496 HandleMark hm(THREAD); |
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497 instanceKlassHandle this_oop(THREAD, this); |
| 0 | 498 link_class_impl(this_oop, true, CHECK); |
| 499 } | |
| 500 } | |
| 501 | |
| 502 // Called to verify that a class can link during initialization, without | |
| 503 // throwing a VerifyError. | |
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504 bool InstanceKlass::link_class_or_fail(TRAPS) { |
| 0 | 505 assert(is_loaded(), "must be loaded"); |
| 506 if (!is_linked()) { | |
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507 HandleMark hm(THREAD); |
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508 instanceKlassHandle this_oop(THREAD, this); |
| 0 | 509 link_class_impl(this_oop, false, CHECK_false); |
| 510 } | |
| 511 return is_linked(); | |
| 512 } | |
| 513 | |
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514 bool InstanceKlass::link_class_impl( |
| 0 | 515 instanceKlassHandle this_oop, bool throw_verifyerror, TRAPS) { |
| 516 // check for error state | |
| 517 if (this_oop->is_in_error_state()) { | |
| 518 ResourceMark rm(THREAD); | |
| 519 THROW_MSG_(vmSymbols::java_lang_NoClassDefFoundError(), | |
| 520 this_oop->external_name(), false); | |
| 521 } | |
| 522 // return if already verified | |
| 523 if (this_oop->is_linked()) { | |
| 524 return true; | |
| 525 } | |
| 526 | |
| 527 // Timing | |
| 528 // timer handles recursion | |
| 529 assert(THREAD->is_Java_thread(), "non-JavaThread in link_class_impl"); | |
| 530 JavaThread* jt = (JavaThread*)THREAD; | |
| 531 | |
| 532 // link super class before linking this class | |
| 533 instanceKlassHandle super(THREAD, this_oop->super()); | |
| 534 if (super.not_null()) { | |
| 535 if (super->is_interface()) { // check if super class is an interface | |
| 536 ResourceMark rm(THREAD); | |
| 537 Exceptions::fthrow( | |
| 538 THREAD_AND_LOCATION, | |
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539 vmSymbols::java_lang_IncompatibleClassChangeError(), |
| 0 | 540 "class %s has interface %s as super class", |
| 541 this_oop->external_name(), | |
| 542 super->external_name() | |
| 543 ); | |
| 544 return false; | |
| 545 } | |
| 546 | |
| 547 link_class_impl(super, throw_verifyerror, CHECK_false); | |
| 548 } | |
| 549 | |
| 550 // link all interfaces implemented by this class before linking this class | |
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551 Array<Klass*>* interfaces = this_oop->local_interfaces(); |
| 0 | 552 int num_interfaces = interfaces->length(); |
| 553 for (int index = 0; index < num_interfaces; index++) { | |
| 554 HandleMark hm(THREAD); | |
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555 instanceKlassHandle ih(THREAD, interfaces->at(index)); |
| 0 | 556 link_class_impl(ih, throw_verifyerror, CHECK_false); |
| 557 } | |
| 558 | |
| 559 // in case the class is linked in the process of linking its superclasses | |
| 560 if (this_oop->is_linked()) { | |
| 561 return true; | |
| 562 } | |
| 563 | |
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564 // trace only the link time for this klass that includes |
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565 // the verification time |
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566 PerfClassTraceTime vmtimer(ClassLoader::perf_class_link_time(), |
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567 ClassLoader::perf_class_link_selftime(), |
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568 ClassLoader::perf_classes_linked(), |
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569 jt->get_thread_stat()->perf_recursion_counts_addr(), |
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570 jt->get_thread_stat()->perf_timers_addr(), |
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571 PerfClassTraceTime::CLASS_LINK); |
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572 |
| 0 | 573 // verification & rewriting |
| 574 { | |
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575 volatile oop init_lock = this_oop->init_lock(); |
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576 ObjectLocker ol(init_lock, THREAD, init_lock != NULL); |
| 0 | 577 // rewritten will have been set if loader constraint error found |
| 578 // on an earlier link attempt | |
| 579 // don't verify or rewrite if already rewritten | |
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580 |
| 0 | 581 if (!this_oop->is_linked()) { |
| 582 if (!this_oop->is_rewritten()) { | |
| 583 { | |
| 584 // Timer includes any side effects of class verification (resolution, | |
| 585 // etc), but not recursive entry into verify_code(). | |
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586 PerfClassTraceTime timer(ClassLoader::perf_class_verify_time(), |
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587 ClassLoader::perf_class_verify_selftime(), |
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588 ClassLoader::perf_classes_verified(), |
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589 jt->get_thread_stat()->perf_recursion_counts_addr(), |
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590 jt->get_thread_stat()->perf_timers_addr(), |
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591 PerfClassTraceTime::CLASS_VERIFY); |
| 0 | 592 bool verify_ok = verify_code(this_oop, throw_verifyerror, THREAD); |
| 593 if (!verify_ok) { | |
| 594 return false; | |
| 595 } | |
| 596 } | |
| 597 | |
| 598 // Just in case a side-effect of verify linked this class already | |
| 599 // (which can sometimes happen since the verifier loads classes | |
| 600 // using custom class loaders, which are free to initialize things) | |
| 601 if (this_oop->is_linked()) { | |
| 602 return true; | |
| 603 } | |
| 604 | |
| 605 // also sets rewritten | |
| 606 this_oop->rewrite_class(CHECK_false); | |
| 607 } | |
| 608 | |
| 3404 | 609 // relocate jsrs and link methods after they are all rewritten |
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610 this_oop->link_methods(CHECK_false); |
| 3404 | 611 |
| 0 | 612 // Initialize the vtable and interface table after |
| 613 // methods have been rewritten since rewrite may | |
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614 // fabricate new Method*s. |
| 0 | 615 // also does loader constraint checking |
| 616 if (!this_oop()->is_shared()) { | |
| 617 ResourceMark rm(THREAD); | |
| 618 this_oop->vtable()->initialize_vtable(true, CHECK_false); | |
| 619 this_oop->itable()->initialize_itable(true, CHECK_false); | |
| 620 } | |
| 621 #ifdef ASSERT | |
| 622 else { | |
| 623 ResourceMark rm(THREAD); | |
| 624 this_oop->vtable()->verify(tty, true); | |
| 625 // In case itable verification is ever added. | |
| 626 // this_oop->itable()->verify(tty, true); | |
| 627 } | |
| 628 #endif | |
| 629 this_oop->set_init_state(linked); | |
| 630 if (JvmtiExport::should_post_class_prepare()) { | |
| 631 Thread *thread = THREAD; | |
| 632 assert(thread->is_Java_thread(), "thread->is_Java_thread()"); | |
| 633 JvmtiExport::post_class_prepare((JavaThread *) thread, this_oop()); | |
| 634 } | |
| 635 } | |
| 636 } | |
| 637 return true; | |
| 638 } | |
| 639 | |
| 640 | |
| 641 // Rewrite the byte codes of all of the methods of a class. | |
| 642 // The rewriter must be called exactly once. Rewriting must happen after | |
| 643 // verification but before the first method of the class is executed. | |
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644 void InstanceKlass::rewrite_class(TRAPS) { |
| 0 | 645 assert(is_loaded(), "must be loaded"); |
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646 instanceKlassHandle this_oop(THREAD, this); |
| 0 | 647 if (this_oop->is_rewritten()) { |
| 648 assert(this_oop()->is_shared(), "rewriting an unshared class?"); | |
| 649 return; | |
| 650 } | |
| 3404 | 651 Rewriter::rewrite(this_oop, CHECK); |
| 0 | 652 this_oop->set_rewritten(); |
| 653 } | |
| 654 | |
| 3404 | 655 // Now relocate and link method entry points after class is rewritten. |
| 656 // This is outside is_rewritten flag. In case of an exception, it can be | |
| 657 // executed more than once. | |
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658 void InstanceKlass::link_methods(TRAPS) { |
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659 int len = methods()->length(); |
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660 for (int i = len-1; i >= 0; i--) { |
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661 methodHandle m(THREAD, methods()->at(i)); |
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662 |
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663 // Set up method entry points for compiler and interpreter . |
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664 m->link_method(m, CHECK); |
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665 |
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666 // This is for JVMTI and unrelated to relocator but the last thing we do |
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667 #ifdef ASSERT |
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668 if (StressMethodComparator) { |
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669 ResourceMark rm(THREAD); |
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670 static int nmc = 0; |
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671 for (int j = i; j >= 0 && j >= i-4; j--) { |
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672 if ((++nmc % 1000) == 0) tty->print_cr("Have run MethodComparator %d times...", nmc); |
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673 bool z = MethodComparator::methods_EMCP(m(), |
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674 methods()->at(j)); |
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675 if (j == i && !z) { |
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676 tty->print("MethodComparator FAIL: "); m->print(); m->print_codes(); |
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677 assert(z, "method must compare equal to itself"); |
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678 } |
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679 } |
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680 } |
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681 #endif //ASSERT |
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682 } |
| 3404 | 683 } |
| 684 | |
| 0 | 685 |
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686 void InstanceKlass::initialize_impl(instanceKlassHandle this_oop, TRAPS) { |
| 0 | 687 // Make sure klass is linked (verified) before initialization |
| 688 // A class could already be verified, since it has been reflected upon. | |
| 689 this_oop->link_class(CHECK); | |
| 690 | |
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691 DTRACE_CLASSINIT_PROBE(required, InstanceKlass::cast(this_oop()), -1); |
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692 |
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693 bool wait = false; |
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694 |
| 0 | 695 // refer to the JVM book page 47 for description of steps |
| 696 // Step 1 | |
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697 { |
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698 volatile oop init_lock = this_oop->init_lock(); |
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699 ObjectLocker ol(init_lock, THREAD, init_lock != NULL); |
| 0 | 700 |
| 701 Thread *self = THREAD; // it's passed the current thread | |
| 702 | |
| 703 // Step 2 | |
| 704 // If we were to use wait() instead of waitInterruptibly() then | |
| 705 // we might end up throwing IE from link/symbol resolution sites | |
| 706 // that aren't expected to throw. This would wreak havoc. See 6320309. | |
| 707 while(this_oop->is_being_initialized() && !this_oop->is_reentrant_initialization(self)) { | |
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708 wait = true; |
| 0 | 709 ol.waitUninterruptibly(CHECK); |
| 710 } | |
| 711 | |
| 712 // Step 3 | |
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713 if (this_oop->is_being_initialized() && this_oop->is_reentrant_initialization(self)) { |
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714 DTRACE_CLASSINIT_PROBE_WAIT(recursive, InstanceKlass::cast(this_oop()), -1,wait); |
| 0 | 715 return; |
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716 } |
| 0 | 717 |
| 718 // Step 4 | |
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719 if (this_oop->is_initialized()) { |
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720 DTRACE_CLASSINIT_PROBE_WAIT(concurrent, InstanceKlass::cast(this_oop()), -1,wait); |
| 0 | 721 return; |
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722 } |
| 0 | 723 |
| 724 // Step 5 | |
| 725 if (this_oop->is_in_error_state()) { | |
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726 DTRACE_CLASSINIT_PROBE_WAIT(erroneous, InstanceKlass::cast(this_oop()), -1,wait); |
| 0 | 727 ResourceMark rm(THREAD); |
| 728 const char* desc = "Could not initialize class "; | |
| 729 const char* className = this_oop->external_name(); | |
| 730 size_t msglen = strlen(desc) + strlen(className) + 1; | |
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731 char* message = NEW_RESOURCE_ARRAY(char, msglen); |
| 0 | 732 if (NULL == message) { |
| 733 // Out of memory: can't create detailed error message | |
| 734 THROW_MSG(vmSymbols::java_lang_NoClassDefFoundError(), className); | |
| 735 } else { | |
| 736 jio_snprintf(message, msglen, "%s%s", desc, className); | |
| 737 THROW_MSG(vmSymbols::java_lang_NoClassDefFoundError(), message); | |
| 738 } | |
| 739 } | |
| 740 | |
| 741 // Step 6 | |
| 742 this_oop->set_init_state(being_initialized); | |
| 743 this_oop->set_init_thread(self); | |
| 744 } | |
| 745 | |
| 746 // Step 7 | |
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747 Klass* super_klass = this_oop->super(); |
| 6983 | 748 if (super_klass != NULL && !this_oop->is_interface() && super_klass->should_be_initialized()) { |
| 749 super_klass->initialize(THREAD); | |
| 0 | 750 |
| 751 if (HAS_PENDING_EXCEPTION) { | |
| 752 Handle e(THREAD, PENDING_EXCEPTION); | |
| 753 CLEAR_PENDING_EXCEPTION; | |
| 754 { | |
| 755 EXCEPTION_MARK; | |
| 756 this_oop->set_initialization_state_and_notify(initialization_error, THREAD); // Locks object, set state, and notify all waiting threads | |
| 757 CLEAR_PENDING_EXCEPTION; // ignore any exception thrown, superclass initialization error is thrown below | |
| 758 } | |
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759 DTRACE_CLASSINIT_PROBE_WAIT(super__failed, InstanceKlass::cast(this_oop()), -1,wait); |
| 0 | 760 THROW_OOP(e()); |
| 761 } | |
| 762 } | |
| 763 | |
| 6934 | 764 if (this_oop->has_default_methods()) { |
| 765 // Step 7.5: initialize any interfaces which have default methods | |
| 766 for (int i = 0; i < this_oop->local_interfaces()->length(); ++i) { | |
| 767 Klass* iface = this_oop->local_interfaces()->at(i); | |
| 768 InstanceKlass* ik = InstanceKlass::cast(iface); | |
| 769 if (ik->has_default_methods() && ik->should_be_initialized()) { | |
| 770 ik->initialize(THREAD); | |
| 771 | |
| 772 if (HAS_PENDING_EXCEPTION) { | |
| 773 Handle e(THREAD, PENDING_EXCEPTION); | |
| 774 CLEAR_PENDING_EXCEPTION; | |
| 775 { | |
| 776 EXCEPTION_MARK; | |
| 777 // Locks object, set state, and notify all waiting threads | |
| 778 this_oop->set_initialization_state_and_notify( | |
| 779 initialization_error, THREAD); | |
| 780 | |
| 781 // ignore any exception thrown, superclass initialization error is | |
| 782 // thrown below | |
| 783 CLEAR_PENDING_EXCEPTION; | |
| 784 } | |
| 785 DTRACE_CLASSINIT_PROBE_WAIT( | |
| 786 super__failed, InstanceKlass::cast(this_oop()), -1, wait); | |
| 787 THROW_OOP(e()); | |
| 788 } | |
| 789 } | |
| 790 } | |
| 791 } | |
| 792 | |
| 0 | 793 // Step 8 |
| 794 { | |
| 795 assert(THREAD->is_Java_thread(), "non-JavaThread in initialize_impl"); | |
| 796 JavaThread* jt = (JavaThread*)THREAD; | |
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797 DTRACE_CLASSINIT_PROBE_WAIT(clinit, InstanceKlass::cast(this_oop()), -1,wait); |
| 0 | 798 // Timer includes any side effects of class initialization (resolution, |
| 799 // etc), but not recursive entry into call_class_initializer(). | |
|
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800 PerfClassTraceTime timer(ClassLoader::perf_class_init_time(), |
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801 ClassLoader::perf_class_init_selftime(), |
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802 ClassLoader::perf_classes_inited(), |
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803 jt->get_thread_stat()->perf_recursion_counts_addr(), |
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804 jt->get_thread_stat()->perf_timers_addr(), |
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805 PerfClassTraceTime::CLASS_CLINIT); |
| 0 | 806 this_oop->call_class_initializer(THREAD); |
| 807 } | |
| 808 | |
| 809 // Step 9 | |
| 810 if (!HAS_PENDING_EXCEPTION) { | |
| 811 this_oop->set_initialization_state_and_notify(fully_initialized, CHECK); | |
| 812 { ResourceMark rm(THREAD); | |
| 813 debug_only(this_oop->vtable()->verify(tty, true);) | |
| 814 } | |
| 815 } | |
| 816 else { | |
| 817 // Step 10 and 11 | |
| 818 Handle e(THREAD, PENDING_EXCEPTION); | |
| 819 CLEAR_PENDING_EXCEPTION; | |
| 820 { | |
| 821 EXCEPTION_MARK; | |
| 822 this_oop->set_initialization_state_and_notify(initialization_error, THREAD); | |
| 823 CLEAR_PENDING_EXCEPTION; // ignore any exception thrown, class initialization error is thrown below | |
| 824 } | |
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825 DTRACE_CLASSINIT_PROBE_WAIT(error, InstanceKlass::cast(this_oop()), -1,wait); |
| 1142 | 826 if (e->is_a(SystemDictionary::Error_klass())) { |
| 0 | 827 THROW_OOP(e()); |
| 828 } else { | |
| 829 JavaCallArguments args(e); | |
|
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830 THROW_ARG(vmSymbols::java_lang_ExceptionInInitializerError(), |
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831 vmSymbols::throwable_void_signature(), |
| 0 | 832 &args); |
| 833 } | |
| 834 } | |
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835 DTRACE_CLASSINIT_PROBE_WAIT(end, InstanceKlass::cast(this_oop()), -1,wait); |
| 0 | 836 } |
| 837 | |
| 838 | |
| 839 // Note: implementation moved to static method to expose the this pointer. | |
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840 void InstanceKlass::set_initialization_state_and_notify(ClassState state, TRAPS) { |
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841 instanceKlassHandle kh(THREAD, this); |
| 0 | 842 set_initialization_state_and_notify_impl(kh, state, CHECK); |
| 843 } | |
| 844 | |
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845 void InstanceKlass::set_initialization_state_and_notify_impl(instanceKlassHandle this_oop, ClassState state, TRAPS) { |
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846 volatile oop init_lock = this_oop->init_lock(); |
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847 ObjectLocker ol(init_lock, THREAD, init_lock != NULL); |
| 0 | 848 this_oop->set_init_state(state); |
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849 this_oop->fence_and_clear_init_lock(); |
| 0 | 850 ol.notify_all(CHECK); |
| 851 } | |
| 852 | |
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853 // The embedded _implementor field can only record one implementor. |
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854 // When there are more than one implementors, the _implementor field |
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855 // is set to the interface Klass* itself. Following are the possible |
|
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856 // values for the _implementor field: |
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857 // NULL - no implementor |
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858 // implementor Klass* - one implementor |
|
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859 // self - more than one implementor |
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860 // |
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861 // The _implementor field only exists for interfaces. |
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862 void InstanceKlass::add_implementor(Klass* k) { |
| 0 | 863 assert(Compile_lock->owned_by_self(), ""); |
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864 assert(is_interface(), "not interface"); |
| 0 | 865 // Filter out my subinterfaces. |
| 866 // (Note: Interfaces are never on the subklass list.) | |
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867 if (InstanceKlass::cast(k)->is_interface()) return; |
| 0 | 868 |
| 869 // Filter out subclasses whose supers already implement me. | |
| 870 // (Note: CHA must walk subclasses of direct implementors | |
| 871 // in order to locate indirect implementors.) | |
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872 Klass* sk = InstanceKlass::cast(k)->super(); |
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873 if (sk != NULL && InstanceKlass::cast(sk)->implements_interface(this)) |
| 0 | 874 // We only need to check one immediate superclass, since the |
| 875 // implements_interface query looks at transitive_interfaces. | |
| 876 // Any supers of the super have the same (or fewer) transitive_interfaces. | |
| 877 return; | |
| 878 | |
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879 Klass* ik = implementor(); |
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880 if (ik == NULL) { |
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881 set_implementor(k); |
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882 } else if (ik != this) { |
|
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883 // There is already an implementor. Use itself as an indicator of |
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884 // more than one implementors. |
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885 set_implementor(this); |
| 0 | 886 } |
| 887 | |
| 888 // The implementor also implements the transitive_interfaces | |
| 889 for (int index = 0; index < local_interfaces()->length(); index++) { | |
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890 InstanceKlass::cast(local_interfaces()->at(index))->add_implementor(k); |
| 0 | 891 } |
| 892 } | |
| 893 | |
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894 void InstanceKlass::init_implementor() { |
|
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895 if (is_interface()) { |
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896 set_implementor(NULL); |
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897 } |
| 0 | 898 } |
| 899 | |
| 900 | |
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901 void InstanceKlass::process_interfaces(Thread *thread) { |
| 0 | 902 // link this class into the implementors list of every interface it implements |
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903 Klass* this_as_klass_oop = this; |
| 0 | 904 for (int i = local_interfaces()->length() - 1; i >= 0; i--) { |
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905 assert(local_interfaces()->at(i)->is_klass(), "must be a klass"); |
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906 InstanceKlass* interf = InstanceKlass::cast(local_interfaces()->at(i)); |
| 0 | 907 assert(interf->is_interface(), "expected interface"); |
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908 interf->add_implementor(this_as_klass_oop); |
| 0 | 909 } |
| 910 } | |
| 911 | |
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912 bool InstanceKlass::can_be_primary_super_slow() const { |
| 0 | 913 if (is_interface()) |
| 914 return false; | |
| 915 else | |
| 916 return Klass::can_be_primary_super_slow(); | |
| 917 } | |
| 918 | |
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919 GrowableArray<Klass*>* InstanceKlass::compute_secondary_supers(int num_extra_slots) { |
| 0 | 920 // The secondaries are the implemented interfaces. |
|
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921 InstanceKlass* ik = InstanceKlass::cast(this); |
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922 Array<Klass*>* interfaces = ik->transitive_interfaces(); |
| 0 | 923 int num_secondaries = num_extra_slots + interfaces->length(); |
| 924 if (num_secondaries == 0) { | |
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925 // Must share this for correct bootstrapping! |
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926 set_secondary_supers(Universe::the_empty_klass_array()); |
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927 return NULL; |
| 0 | 928 } else if (num_extra_slots == 0) { |
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929 // The secondary super list is exactly the same as the transitive interfaces. |
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930 // Redefine classes has to be careful not to delete this! |
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931 set_secondary_supers(interfaces); |
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932 return NULL; |
| 0 | 933 } else { |
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934 // Copy transitive interfaces to a temporary growable array to be constructed |
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935 // into the secondary super list with extra slots. |
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936 GrowableArray<Klass*>* secondaries = new GrowableArray<Klass*>(interfaces->length()); |
| 0 | 937 for (int i = 0; i < interfaces->length(); i++) { |
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938 secondaries->push(interfaces->at(i)); |
| 0 | 939 } |
| 940 return secondaries; | |
| 941 } | |
| 942 } | |
| 943 | |
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944 bool InstanceKlass::compute_is_subtype_of(Klass* k) { |
| 6983 | 945 if (k->is_interface()) { |
| 0 | 946 return implements_interface(k); |
| 947 } else { | |
| 948 return Klass::compute_is_subtype_of(k); | |
| 949 } | |
| 950 } | |
| 951 | |
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952 bool InstanceKlass::implements_interface(Klass* k) const { |
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953 if (this == k) return true; |
| 6983 | 954 assert(k->is_interface(), "should be an interface class"); |
| 0 | 955 for (int i = 0; i < transitive_interfaces()->length(); i++) { |
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956 if (transitive_interfaces()->at(i) == k) { |
| 0 | 957 return true; |
| 958 } | |
| 959 } | |
| 960 return false; | |
| 961 } | |
| 962 | |
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963 objArrayOop InstanceKlass::allocate_objArray(int n, int length, TRAPS) { |
| 0 | 964 if (length < 0) THROW_0(vmSymbols::java_lang_NegativeArraySizeException()); |
| 965 if (length > arrayOopDesc::max_array_length(T_OBJECT)) { | |
|
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966 report_java_out_of_memory("Requested array size exceeds VM limit"); |
|
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967 JvmtiExport::post_array_size_exhausted(); |
| 0 | 968 THROW_OOP_0(Universe::out_of_memory_error_array_size()); |
| 969 } | |
| 970 int size = objArrayOopDesc::object_size(length); | |
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971 Klass* ak = array_klass(n, CHECK_NULL); |
| 0 | 972 KlassHandle h_ak (THREAD, ak); |
| 973 objArrayOop o = | |
| 974 (objArrayOop)CollectedHeap::array_allocate(h_ak, size, length, CHECK_NULL); | |
| 975 return o; | |
| 976 } | |
| 977 | |
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978 instanceOop InstanceKlass::register_finalizer(instanceOop i, TRAPS) { |
| 0 | 979 if (TraceFinalizerRegistration) { |
| 980 tty->print("Registered "); | |
| 981 i->print_value_on(tty); | |
| 982 tty->print_cr(" (" INTPTR_FORMAT ") as finalizable", (address)i); | |
| 983 } | |
| 984 instanceHandle h_i(THREAD, i); | |
| 985 // Pass the handle as argument, JavaCalls::call expects oop as jobjects | |
| 986 JavaValue result(T_VOID); | |
| 987 JavaCallArguments args(h_i); | |
| 988 methodHandle mh (THREAD, Universe::finalizer_register_method()); | |
| 989 JavaCalls::call(&result, mh, &args, CHECK_NULL); | |
| 990 return h_i(); | |
| 991 } | |
| 992 | |
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993 instanceOop InstanceKlass::allocate_instance(TRAPS) { |
| 0 | 994 bool has_finalizer_flag = has_finalizer(); // Query before possible GC |
| 995 int size = size_helper(); // Query before forming handle. | |
| 996 | |
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997 KlassHandle h_k(THREAD, this); |
| 0 | 998 |
| 999 instanceOop i; | |
| 1000 | |
| 1001 i = (instanceOop)CollectedHeap::obj_allocate(h_k, size, CHECK_NULL); | |
| 1002 if (has_finalizer_flag && !RegisterFinalizersAtInit) { | |
| 1003 i = register_finalizer(i, CHECK_NULL); | |
| 1004 } | |
| 1005 return i; | |
| 1006 } | |
| 1007 | |
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1008 void InstanceKlass::check_valid_for_instantiation(bool throwError, TRAPS) { |
| 0 | 1009 if (is_interface() || is_abstract()) { |
| 1010 ResourceMark rm(THREAD); | |
| 1011 THROW_MSG(throwError ? vmSymbols::java_lang_InstantiationError() | |
| 1012 : vmSymbols::java_lang_InstantiationException(), external_name()); | |
| 1013 } | |
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1014 if (this == SystemDictionary::Class_klass()) { |
| 0 | 1015 ResourceMark rm(THREAD); |
| 1016 THROW_MSG(throwError ? vmSymbols::java_lang_IllegalAccessError() | |
| 1017 : vmSymbols::java_lang_IllegalAccessException(), external_name()); | |
| 1018 } | |
| 1019 } | |
| 1020 | |
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1021 Klass* InstanceKlass::array_klass_impl(bool or_null, int n, TRAPS) { |
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1022 instanceKlassHandle this_oop(THREAD, this); |
| 0 | 1023 return array_klass_impl(this_oop, or_null, n, THREAD); |
| 1024 } | |
| 1025 | |
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1026 Klass* InstanceKlass::array_klass_impl(instanceKlassHandle this_oop, bool or_null, int n, TRAPS) { |
| 0 | 1027 if (this_oop->array_klasses() == NULL) { |
| 1028 if (or_null) return NULL; | |
| 1029 | |
| 1030 ResourceMark rm; | |
| 1031 JavaThread *jt = (JavaThread *)THREAD; | |
| 1032 { | |
| 1033 // Atomic creation of array_klasses | |
| 1034 MutexLocker mc(Compile_lock, THREAD); // for vtables | |
| 1035 MutexLocker ma(MultiArray_lock, THREAD); | |
| 1036 | |
| 1037 // Check if update has already taken place | |
| 1038 if (this_oop->array_klasses() == NULL) { | |
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1039 Klass* k = ObjArrayKlass::allocate_objArray_klass(this_oop->class_loader_data(), 1, this_oop, CHECK_NULL); |
| 0 | 1040 this_oop->set_array_klasses(k); |
| 1041 } | |
| 1042 } | |
| 1043 } | |
| 1044 // _this will always be set at this point | |
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1045 ObjArrayKlass* oak = (ObjArrayKlass*)this_oop->array_klasses(); |
| 0 | 1046 if (or_null) { |
| 1047 return oak->array_klass_or_null(n); | |
| 1048 } | |
| 1049 return oak->array_klass(n, CHECK_NULL); | |
| 1050 } | |
| 1051 | |
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1052 Klass* InstanceKlass::array_klass_impl(bool or_null, TRAPS) { |
| 0 | 1053 return array_klass_impl(or_null, 1, THREAD); |
| 1054 } | |
| 1055 | |
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1056 void InstanceKlass::call_class_initializer(TRAPS) { |
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1057 instanceKlassHandle ik (THREAD, this); |
| 0 | 1058 call_class_initializer_impl(ik, THREAD); |
| 1059 } | |
| 1060 | |
| 1061 static int call_class_initializer_impl_counter = 0; // for debugging | |
| 1062 | |
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1063 Method* InstanceKlass::class_initializer() { |
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1064 Method* clinit = find_method( |
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1065 vmSymbols::class_initializer_name(), vmSymbols::void_method_signature()); |
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1066 if (clinit != NULL && clinit->has_valid_initializer_flags()) { |
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1067 return clinit; |
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1068 } |
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1069 return NULL; |
| 0 | 1070 } |
| 1071 | |
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1072 void InstanceKlass::call_class_initializer_impl(instanceKlassHandle this_oop, TRAPS) { |
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1073 if (ReplayCompiles && |
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1074 (ReplaySuppressInitializers == 1 || |
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1075 ReplaySuppressInitializers >= 2 && this_oop->class_loader() != NULL)) { |
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1076 // Hide the existence of the initializer for the purpose of replaying the compile |
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1077 return; |
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1078 } |
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1079 |
| 0 | 1080 methodHandle h_method(THREAD, this_oop->class_initializer()); |
| 1081 assert(!this_oop->is_initialized(), "we cannot initialize twice"); | |
| 1082 if (TraceClassInitialization) { | |
| 1083 tty->print("%d Initializing ", call_class_initializer_impl_counter++); | |
| 1084 this_oop->name()->print_value(); | |
| 1085 tty->print_cr("%s (" INTPTR_FORMAT ")", h_method() == NULL ? "(no method)" : "", (address)this_oop()); | |
| 1086 } | |
| 1087 if (h_method() != NULL) { | |
| 1088 JavaCallArguments args; // No arguments | |
| 1089 JavaValue result(T_VOID); | |
| 1090 JavaCalls::call(&result, h_method, &args, CHECK); // Static call (no args) | |
| 1091 } | |
| 1092 } | |
| 1093 | |
| 1094 | |
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1095 void InstanceKlass::mask_for(methodHandle method, int bci, |
| 0 | 1096 InterpreterOopMap* entry_for) { |
| 1097 // Dirty read, then double-check under a lock. | |
| 1098 if (_oop_map_cache == NULL) { | |
| 1099 // Otherwise, allocate a new one. | |
| 1100 MutexLocker x(OopMapCacheAlloc_lock); | |
| 1101 // First time use. Allocate a cache in C heap | |
| 1102 if (_oop_map_cache == NULL) { | |
| 1103 _oop_map_cache = new OopMapCache(); | |
| 1104 } | |
| 1105 } | |
| 1106 // _oop_map_cache is constant after init; lookup below does is own locking. | |
| 1107 _oop_map_cache->lookup(method, bci, entry_for); | |
| 1108 } | |
| 1109 | |
| 1110 | |
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1111 bool InstanceKlass::find_local_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const { |
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1112 for (JavaFieldStream fs(this); !fs.done(); fs.next()) { |
| 3938 | 1113 Symbol* f_name = fs.name(); |
| 1114 Symbol* f_sig = fs.signature(); | |
| 0 | 1115 if (f_name == name && f_sig == sig) { |
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1116 fd->initialize(const_cast<InstanceKlass*>(this), fs.index()); |
| 0 | 1117 return true; |
| 1118 } | |
| 1119 } | |
| 1120 return false; | |
| 1121 } | |
| 1122 | |
| 1123 | |
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1124 Klass* InstanceKlass::find_interface_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const { |
| 0 | 1125 const int n = local_interfaces()->length(); |
| 1126 for (int i = 0; i < n; i++) { | |
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1127 Klass* intf1 = local_interfaces()->at(i); |
| 6983 | 1128 assert(intf1->is_interface(), "just checking type"); |
| 0 | 1129 // search for field in current interface |
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1130 if (InstanceKlass::cast(intf1)->find_local_field(name, sig, fd)) { |
| 0 | 1131 assert(fd->is_static(), "interface field must be static"); |
| 1132 return intf1; | |
| 1133 } | |
| 1134 // search for field in direct superinterfaces | |
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1135 Klass* intf2 = InstanceKlass::cast(intf1)->find_interface_field(name, sig, fd); |
| 0 | 1136 if (intf2 != NULL) return intf2; |
| 1137 } | |
| 1138 // otherwise field lookup fails | |
| 1139 return NULL; | |
| 1140 } | |
| 1141 | |
| 1142 | |
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1143 Klass* InstanceKlass::find_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const { |
| 0 | 1144 // search order according to newest JVM spec (5.4.3.2, p.167). |
| 1145 // 1) search for field in current klass | |
| 1146 if (find_local_field(name, sig, fd)) { | |
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1147 return const_cast<InstanceKlass*>(this); |
| 0 | 1148 } |
| 1149 // 2) search for field recursively in direct superinterfaces | |
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1150 { Klass* intf = find_interface_field(name, sig, fd); |
| 0 | 1151 if (intf != NULL) return intf; |
| 1152 } | |
| 1153 // 3) apply field lookup recursively if superclass exists | |
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1154 { Klass* supr = super(); |
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1155 if (supr != NULL) return InstanceKlass::cast(supr)->find_field(name, sig, fd); |
| 0 | 1156 } |
| 1157 // 4) otherwise field lookup fails | |
| 1158 return NULL; | |
| 1159 } | |
| 1160 | |
| 1161 | |
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1162 Klass* InstanceKlass::find_field(Symbol* name, Symbol* sig, bool is_static, fieldDescriptor* fd) const { |
| 0 | 1163 // search order according to newest JVM spec (5.4.3.2, p.167). |
| 1164 // 1) search for field in current klass | |
| 1165 if (find_local_field(name, sig, fd)) { | |
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1166 if (fd->is_static() == is_static) return const_cast<InstanceKlass*>(this); |
| 0 | 1167 } |
| 1168 // 2) search for field recursively in direct superinterfaces | |
| 1169 if (is_static) { | |
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1170 Klass* intf = find_interface_field(name, sig, fd); |
| 0 | 1171 if (intf != NULL) return intf; |
| 1172 } | |
| 1173 // 3) apply field lookup recursively if superclass exists | |
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1174 { Klass* supr = super(); |
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1175 if (supr != NULL) return InstanceKlass::cast(supr)->find_field(name, sig, is_static, fd); |
| 0 | 1176 } |
| 1177 // 4) otherwise field lookup fails | |
| 1178 return NULL; | |
| 1179 } | |
| 1180 | |
| 1181 | |
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1182 bool InstanceKlass::find_local_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const { |
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1183 for (JavaFieldStream fs(this); !fs.done(); fs.next()) { |
| 3938 | 1184 if (fs.offset() == offset) { |
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1185 fd->initialize(const_cast<InstanceKlass*>(this), fs.index()); |
| 0 | 1186 if (fd->is_static() == is_static) return true; |
| 1187 } | |
| 1188 } | |
| 1189 return false; | |
| 1190 } | |
| 1191 | |
| 1192 | |
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1193 bool InstanceKlass::find_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const { |
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1194 Klass* klass = const_cast<InstanceKlass*>(this); |
| 0 | 1195 while (klass != NULL) { |
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1196 if (InstanceKlass::cast(klass)->find_local_field_from_offset(offset, is_static, fd)) { |
| 0 | 1197 return true; |
| 1198 } | |
| 6983 | 1199 klass = klass->super(); |
| 0 | 1200 } |
| 1201 return false; | |
| 1202 } | |
| 1203 | |
| 1204 | |
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1205 void InstanceKlass::methods_do(void f(Method* method)) { |
| 0 | 1206 int len = methods()->length(); |
| 1207 for (int index = 0; index < len; index++) { | |
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1208 Method* m = methods()->at(index); |
| 0 | 1209 assert(m->is_method(), "must be method"); |
| 1210 f(m); | |
| 1211 } | |
| 1212 } | |
| 1213 | |
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1214 |
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1215 void InstanceKlass::do_local_static_fields(FieldClosure* cl) { |
| 3938 | 1216 for (JavaFieldStream fs(this); !fs.done(); fs.next()) { |
| 1217 if (fs.access_flags().is_static()) { | |
| 1218 fieldDescriptor fd; | |
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1219 fd.initialize(this, fs.index()); |
| 3938 | 1220 cl->do_field(&fd); |
| 1221 } | |
| 0 | 1222 } |
| 1223 } | |
| 1224 | |
| 1225 | |
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1226 void InstanceKlass::do_local_static_fields(void f(fieldDescriptor*, TRAPS), TRAPS) { |
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1227 instanceKlassHandle h_this(THREAD, this); |
| 0 | 1228 do_local_static_fields_impl(h_this, f, CHECK); |
| 1229 } | |
| 1230 | |
| 1231 | |
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1232 void InstanceKlass::do_local_static_fields_impl(instanceKlassHandle this_oop, void f(fieldDescriptor* fd, TRAPS), TRAPS) { |
| 3938 | 1233 for (JavaFieldStream fs(this_oop()); !fs.done(); fs.next()) { |
| 1234 if (fs.access_flags().is_static()) { | |
| 1235 fieldDescriptor fd; | |
| 1236 fd.initialize(this_oop(), fs.index()); | |
| 1237 f(&fd, CHECK); | |
| 1238 } | |
| 0 | 1239 } |
| 1240 } | |
| 1241 | |
| 1242 | |
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1243 static int compare_fields_by_offset(int* a, int* b) { |
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1244 return a[0] - b[0]; |
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1245 } |
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1246 |
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1247 void InstanceKlass::do_nonstatic_fields(FieldClosure* cl) { |
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1248 InstanceKlass* super = superklass(); |
| 0 | 1249 if (super != NULL) { |
| 1250 super->do_nonstatic_fields(cl); | |
| 1251 } | |
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1252 fieldDescriptor fd; |
| 3938 | 1253 int length = java_fields_count(); |
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1254 // In DebugInfo nonstatic fields are sorted by offset. |
| 6197 | 1255 int* fields_sorted = NEW_C_HEAP_ARRAY(int, 2*(length+1), mtClass); |
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1256 int j = 0; |
| 3938 | 1257 for (int i = 0; i < length; i += 1) { |
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1258 fd.initialize(this, i); |
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1259 if (!fd.is_static()) { |
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1260 fields_sorted[j + 0] = fd.offset(); |
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1261 fields_sorted[j + 1] = i; |
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1262 j += 2; |
|
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1263 } |
| 0 | 1264 } |
|
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1265 if (j > 0) { |
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1266 length = j; |
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1267 // _sort_Fn is defined in growableArray.hpp. |
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1268 qsort(fields_sorted, length/2, 2*sizeof(int), (_sort_Fn)compare_fields_by_offset); |
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1269 for (int i = 0; i < length; i += 2) { |
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1270 fd.initialize(this, fields_sorted[i + 1]); |
|
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1271 assert(!fd.is_static() && fd.offset() == fields_sorted[i], "only nonstatic fields"); |
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1272 cl->do_field(&fd); |
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1273 } |
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1274 } |
| 6197 | 1275 FREE_C_HEAP_ARRAY(int, fields_sorted, mtClass); |
| 0 | 1276 } |
| 1277 | |
| 1278 | |
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1279 void InstanceKlass::array_klasses_do(void f(Klass* k, TRAPS), TRAPS) { |
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1280 if (array_klasses() != NULL) |
|
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1281 ArrayKlass::cast(array_klasses())->array_klasses_do(f, THREAD); |
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1282 } |
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1283 |
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1284 void InstanceKlass::array_klasses_do(void f(Klass* k)) { |
| 0 | 1285 if (array_klasses() != NULL) |
|
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1286 ArrayKlass::cast(array_klasses())->array_klasses_do(f); |
| 0 | 1287 } |
| 1288 | |
| 1289 | |
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1290 void InstanceKlass::with_array_klasses_do(void f(Klass* k)) { |
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1291 f(this); |
| 0 | 1292 array_klasses_do(f); |
| 1293 } | |
| 1294 | |
| 1295 #ifdef ASSERT | |
|
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1296 static int linear_search(Array<Method*>* methods, Symbol* name, Symbol* signature) { |
| 0 | 1297 int len = methods->length(); |
| 1298 for (int index = 0; index < len; index++) { | |
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1299 Method* m = methods->at(index); |
| 0 | 1300 assert(m->is_method(), "must be method"); |
| 1301 if (m->signature() == signature && m->name() == name) { | |
| 1302 return index; | |
| 1303 } | |
| 1304 } | |
| 1305 return -1; | |
| 1306 } | |
| 1307 #endif | |
| 1308 | |
| 6934 | 1309 static int binary_search(Array<Method*>* methods, Symbol* name) { |
| 0 | 1310 int len = methods->length(); |
| 1311 // methods are sorted, so do binary search | |
| 1312 int l = 0; | |
| 1313 int h = len - 1; | |
| 1314 while (l <= h) { | |
| 1315 int mid = (l + h) >> 1; | |
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1316 Method* m = methods->at(mid); |
| 0 | 1317 assert(m->is_method(), "must be method"); |
| 1318 int res = m->name()->fast_compare(name); | |
| 1319 if (res == 0) { | |
| 6934 | 1320 return mid; |
| 0 | 1321 } else if (res < 0) { |
| 1322 l = mid + 1; | |
| 1323 } else { | |
| 1324 h = mid - 1; | |
| 1325 } | |
| 1326 } | |
| 6934 | 1327 return -1; |
| 1328 } | |
| 1329 | |
| 1330 Method* InstanceKlass::find_method(Symbol* name, Symbol* signature) const { | |
| 1331 return InstanceKlass::find_method(methods(), name, signature); | |
| 1332 } | |
| 1333 | |
| 1334 Method* InstanceKlass::find_method( | |
| 1335 Array<Method*>* methods, Symbol* name, Symbol* signature) { | |
| 1336 int hit = binary_search(methods, name); | |
| 1337 if (hit != -1) { | |
| 1338 Method* m = methods->at(hit); | |
| 1339 // Do linear search to find matching signature. First, quick check | |
| 1340 // for common case | |
| 1341 if (m->signature() == signature) return m; | |
| 1342 // search downwards through overloaded methods | |
| 1343 int i; | |
| 1344 for (i = hit - 1; i >= 0; --i) { | |
| 1345 Method* m = methods->at(i); | |
| 1346 assert(m->is_method(), "must be method"); | |
| 1347 if (m->name() != name) break; | |
| 1348 if (m->signature() == signature) return m; | |
| 1349 } | |
| 1350 // search upwards | |
| 1351 for (i = hit + 1; i < methods->length(); ++i) { | |
| 1352 Method* m = methods->at(i); | |
| 1353 assert(m->is_method(), "must be method"); | |
| 1354 if (m->name() != name) break; | |
| 1355 if (m->signature() == signature) return m; | |
| 1356 } | |
| 1357 // not found | |
| 0 | 1358 #ifdef ASSERT |
| 6934 | 1359 int index = linear_search(methods, name, signature); |
| 1360 assert(index == -1, err_msg("binary search should have found entry %d", index)); | |
| 0 | 1361 #endif |
| 6934 | 1362 } |
| 0 | 1363 return NULL; |
| 1364 } | |
| 1365 | |
| 6934 | 1366 int InstanceKlass::find_method_by_name(Symbol* name, int* end) { |
| 1367 return find_method_by_name(methods(), name, end); | |
| 1368 } | |
| 1369 | |
| 1370 int InstanceKlass::find_method_by_name( | |
| 1371 Array<Method*>* methods, Symbol* name, int* end_ptr) { | |
| 1372 assert(end_ptr != NULL, "just checking"); | |
| 1373 int start = binary_search(methods, name); | |
| 1374 int end = start + 1; | |
| 1375 if (start != -1) { | |
| 1376 while (start - 1 >= 0 && (methods->at(start - 1))->name() == name) --start; | |
| 1377 while (end < methods->length() && (methods->at(end))->name() == name) ++end; | |
| 1378 *end_ptr = end; | |
| 1379 return start; | |
| 1380 } | |
| 1381 return -1; | |
| 1382 } | |
| 1383 | |
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1384 Method* InstanceKlass::uncached_lookup_method(Symbol* name, Symbol* signature) const { |
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1385 Klass* klass = const_cast<InstanceKlass*>(this); |
| 0 | 1386 while (klass != NULL) { |
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1387 Method* method = InstanceKlass::cast(klass)->find_method(name, signature); |
| 0 | 1388 if (method != NULL) return method; |
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1389 klass = InstanceKlass::cast(klass)->super(); |
| 0 | 1390 } |
| 1391 return NULL; | |
| 1392 } | |
| 1393 | |
| 1394 // lookup a method in all the interfaces that this class implements | |
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1395 Method* InstanceKlass::lookup_method_in_all_interfaces(Symbol* name, |
|
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1396 Symbol* signature) const { |
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1397 Array<Klass*>* all_ifs = transitive_interfaces(); |
| 0 | 1398 int num_ifs = all_ifs->length(); |
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1399 InstanceKlass *ik = NULL; |
| 0 | 1400 for (int i = 0; i < num_ifs; i++) { |
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1401 ik = InstanceKlass::cast(all_ifs->at(i)); |
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1402 Method* m = ik->lookup_method(name, signature); |
| 0 | 1403 if (m != NULL) { |
| 1404 return m; | |
| 1405 } | |
| 1406 } | |
| 1407 return NULL; | |
| 1408 } | |
| 1409 | |
| 1410 /* jni_id_for_impl for jfieldIds only */ | |
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1411 JNIid* InstanceKlass::jni_id_for_impl(instanceKlassHandle this_oop, int offset) { |
| 0 | 1412 MutexLocker ml(JfieldIdCreation_lock); |
| 1413 // Retry lookup after we got the lock | |
| 1414 JNIid* probe = this_oop->jni_ids() == NULL ? NULL : this_oop->jni_ids()->find(offset); | |
| 1415 if (probe == NULL) { | |
| 1416 // Slow case, allocate new static field identifier | |
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1417 probe = new JNIid(this_oop(), offset, this_oop->jni_ids()); |
| 0 | 1418 this_oop->set_jni_ids(probe); |
| 1419 } | |
| 1420 return probe; | |
| 1421 } | |
| 1422 | |
| 1423 | |
| 1424 /* jni_id_for for jfieldIds only */ | |
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1425 JNIid* InstanceKlass::jni_id_for(int offset) { |
| 0 | 1426 JNIid* probe = jni_ids() == NULL ? NULL : jni_ids()->find(offset); |
| 1427 if (probe == NULL) { | |
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1428 probe = jni_id_for_impl(this, offset); |
| 0 | 1429 } |
| 1430 return probe; | |
| 1431 } | |
| 1432 | |
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1433 u2 InstanceKlass::enclosing_method_data(int offset) { |
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1434 Array<jushort>* inner_class_list = inner_classes(); |
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1435 if (inner_class_list == NULL) { |
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1436 return 0; |
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1437 } |
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1438 int length = inner_class_list->length(); |
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1439 if (length % inner_class_next_offset == 0) { |
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1440 return 0; |
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1441 } else { |
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1442 int index = length - enclosing_method_attribute_size; |
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1443 assert(offset < enclosing_method_attribute_size, "invalid offset"); |
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1444 return inner_class_list->at(index + offset); |
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1445 } |
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1446 } |
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1447 |
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1448 void InstanceKlass::set_enclosing_method_indices(u2 class_index, |
|
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1449 u2 method_index) { |
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1450 Array<jushort>* inner_class_list = inner_classes(); |
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1451 assert (inner_class_list != NULL, "_inner_classes list is not set up"); |
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1452 int length = inner_class_list->length(); |
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1453 if (length % inner_class_next_offset == enclosing_method_attribute_size) { |
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1454 int index = length - enclosing_method_attribute_size; |
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1455 inner_class_list->at_put( |
|
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1456 index + enclosing_method_class_index_offset, class_index); |
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1457 inner_class_list->at_put( |
|
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1458 index + enclosing_method_method_index_offset, method_index); |
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1459 } |
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1460 } |
| 0 | 1461 |
| 1462 // Lookup or create a jmethodID. | |
|
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1463 // This code is called by the VMThread and JavaThreads so the |
|
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1464 // locking has to be done very carefully to avoid deadlocks |
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1465 // and/or other cache consistency problems. |
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1466 // |
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1467 jmethodID InstanceKlass::get_jmethod_id(instanceKlassHandle ik_h, methodHandle method_h) { |
| 0 | 1468 size_t idnum = (size_t)method_h->method_idnum(); |
| 1469 jmethodID* jmeths = ik_h->methods_jmethod_ids_acquire(); | |
| 1470 size_t length = 0; | |
| 1471 jmethodID id = NULL; | |
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1472 |
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1473 // We use a double-check locking idiom here because this cache is |
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1474 // performance sensitive. In the normal system, this cache only |
|
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1475 // transitions from NULL to non-NULL which is safe because we use |
|
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1476 // release_set_methods_jmethod_ids() to advertise the new cache. |
|
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1477 // A partially constructed cache should never be seen by a racing |
|
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1478 // thread. We also use release_store_ptr() to save a new jmethodID |
|
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1479 // in the cache so a partially constructed jmethodID should never be |
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1480 // seen either. Cache reads of existing jmethodIDs proceed without a |
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1481 // lock, but cache writes of a new jmethodID requires uniqueness and |
|
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1482 // creation of the cache itself requires no leaks so a lock is |
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1483 // generally acquired in those two cases. |
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1484 // |
|
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1485 // If the RedefineClasses() API has been used, then this cache can |
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1486 // grow and we'll have transitions from non-NULL to bigger non-NULL. |
|
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1487 // Cache creation requires no leaks and we require safety between all |
|
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1488 // cache accesses and freeing of the old cache so a lock is generally |
|
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1489 // acquired when the RedefineClasses() API has been used. |
| 0 | 1490 |
|
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1491 if (jmeths != NULL) { |
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1492 // the cache already exists |
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1493 if (!ik_h->idnum_can_increment()) { |
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1494 // the cache can't grow so we can just get the current values |
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1495 get_jmethod_id_length_value(jmeths, idnum, &length, &id); |
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1496 } else { |
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1497 // cache can grow so we have to be more careful |
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1498 if (Threads::number_of_threads() == 0 || |
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1499 SafepointSynchronize::is_at_safepoint()) { |
|
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1500 // we're single threaded or at a safepoint - no locking needed |
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1501 get_jmethod_id_length_value(jmeths, idnum, &length, &id); |
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1502 } else { |
|
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1503 MutexLocker ml(JmethodIdCreation_lock); |
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1504 get_jmethod_id_length_value(jmeths, idnum, &length, &id); |
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1505 } |
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1506 } |
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1507 } |
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1508 // implied else: |
|
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1509 // we need to allocate a cache so default length and id values are good |
| 0 | 1510 |
|
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1511 if (jmeths == NULL || // no cache yet |
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1512 length <= idnum || // cache is too short |
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1513 id == NULL) { // cache doesn't contain entry |
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1514 |
|
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1515 // This function can be called by the VMThread so we have to do all |
|
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1516 // things that might block on a safepoint before grabbing the lock. |
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1517 // Otherwise, we can deadlock with the VMThread or have a cache |
|
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1518 // consistency issue. These vars keep track of what we might have |
|
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1519 // to free after the lock is dropped. |
|
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1520 jmethodID to_dealloc_id = NULL; |
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1521 jmethodID* to_dealloc_jmeths = NULL; |
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1522 |
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1523 // may not allocate new_jmeths or use it if we allocate it |
| 0 | 1524 jmethodID* new_jmeths = NULL; |
| 1525 if (length <= idnum) { | |
|
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1526 // allocate a new cache that might be used |
| 0 | 1527 size_t size = MAX2(idnum+1, (size_t)ik_h->idnum_allocated_count()); |
| 6197 | 1528 new_jmeths = NEW_C_HEAP_ARRAY(jmethodID, size+1, mtClass); |
| 0 | 1529 memset(new_jmeths, 0, (size+1)*sizeof(jmethodID)); |
|
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1530 // cache size is stored in element[0], other elements offset by one |
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1531 new_jmeths[0] = (jmethodID)size; |
| 0 | 1532 } |
| 1533 | |
|
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1534 // allocate a new jmethodID that might be used |
| 0 | 1535 jmethodID new_id = NULL; |
| 1536 if (method_h->is_old() && !method_h->is_obsolete()) { | |
| 1537 // The method passed in is old (but not obsolete), we need to use the current version | |
|
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1538 Method* current_method = ik_h->method_with_idnum((int)idnum); |
| 0 | 1539 assert(current_method != NULL, "old and but not obsolete, so should exist"); |
|
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1540 new_id = Method::make_jmethod_id(ik_h->class_loader_data(), current_method); |
| 0 | 1541 } else { |
| 1542 // It is the current version of the method or an obsolete method, | |
| 1543 // use the version passed in | |
|
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1544 new_id = Method::make_jmethod_id(ik_h->class_loader_data(), method_h()); |
| 0 | 1545 } |
| 1546 | |
|
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1547 if (Threads::number_of_threads() == 0 || |
|
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|
1548 SafepointSynchronize::is_at_safepoint()) { |
|
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1549 // we're single threaded or at a safepoint - no locking needed |
|
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1550 id = get_jmethod_id_fetch_or_update(ik_h, idnum, new_id, new_jmeths, |
|
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1551 &to_dealloc_id, &to_dealloc_jmeths); |
|
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1552 } else { |
| 0 | 1553 MutexLocker ml(JmethodIdCreation_lock); |
|
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1554 id = get_jmethod_id_fetch_or_update(ik_h, idnum, new_id, new_jmeths, |
|
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|
1555 &to_dealloc_id, &to_dealloc_jmeths); |
|
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|
1556 } |
|
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|
1557 |
|
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1558 // The lock has been dropped so we can free resources. |
|
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|
1559 // Free up either the old cache or the new cache if we allocated one. |
|
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1560 if (to_dealloc_jmeths != NULL) { |
|
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|
1561 FreeHeap(to_dealloc_jmeths); |
|
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|
1562 } |
|
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|
1563 // free up the new ID since it wasn't needed |
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|
1564 if (to_dealloc_id != NULL) { |
|
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1565 Method::destroy_jmethod_id(ik_h->class_loader_data(), to_dealloc_id); |
|
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|
1566 } |
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|
1567 } |
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|
1568 return id; |
|
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|
1569 } |
| 0 | 1570 |
|
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|
1571 |
|
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|
1572 // Common code to fetch the jmethodID from the cache or update the |
|
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|
1573 // cache with the new jmethodID. This function should never do anything |
|
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|
1574 // that causes the caller to go to a safepoint or we can deadlock with |
|
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|
1575 // the VMThread or have cache consistency issues. |
|
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1576 // |
|
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|
1577 jmethodID InstanceKlass::get_jmethod_id_fetch_or_update( |
|
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1578 instanceKlassHandle ik_h, size_t idnum, jmethodID new_id, |
|
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|
1579 jmethodID* new_jmeths, jmethodID* to_dealloc_id_p, |
|
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|
1580 jmethodID** to_dealloc_jmeths_p) { |
|
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|
1581 assert(new_id != NULL, "sanity check"); |
|
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|
1582 assert(to_dealloc_id_p != NULL, "sanity check"); |
|
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|
1583 assert(to_dealloc_jmeths_p != NULL, "sanity check"); |
|
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|
1584 assert(Threads::number_of_threads() == 0 || |
|
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|
1585 SafepointSynchronize::is_at_safepoint() || |
|
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|
1586 JmethodIdCreation_lock->owned_by_self(), "sanity check"); |
|
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|
1587 |
|
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|
1588 // reacquire the cache - we are locked, single threaded or at a safepoint |
|
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1589 jmethodID* jmeths = ik_h->methods_jmethod_ids_acquire(); |
|
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1590 jmethodID id = NULL; |
|
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1591 size_t length = 0; |
| 0 | 1592 |
|
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1593 if (jmeths == NULL || // no cache yet |
|
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|
1594 (length = (size_t)jmeths[0]) <= idnum) { // cache is too short |
|
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1595 if (jmeths != NULL) { |
|
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|
1596 // copy any existing entries from the old cache |
|
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1597 for (size_t index = 0; index < length; index++) { |
|
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1598 new_jmeths[index+1] = jmeths[index+1]; |
| 0 | 1599 } |
|
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1600 *to_dealloc_jmeths_p = jmeths; // save old cache for later delete |
| 0 | 1601 } |
|
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|
1602 ik_h->release_set_methods_jmethod_ids(jmeths = new_jmeths); |
|
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1603 } else { |
|
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1604 // fetch jmethodID (if any) from the existing cache |
|
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1605 id = jmeths[idnum+1]; |
|
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1606 *to_dealloc_jmeths_p = new_jmeths; // save new cache for later delete |
|
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|
1607 } |
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1608 if (id == NULL) { |
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1609 // No matching jmethodID in the existing cache or we have a new |
|
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1610 // cache or we just grew the cache. This cache write is done here |
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1611 // by the first thread to win the foot race because a jmethodID |
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1612 // needs to be unique once it is generally available. |
|
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1613 id = new_id; |
|
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1614 |
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1615 // The jmethodID cache can be read while unlocked so we have to |
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1616 // make sure the new jmethodID is complete before installing it |
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1617 // in the cache. |
|
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1618 OrderAccess::release_store_ptr(&jmeths[idnum+1], id); |
|
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1619 } else { |
|
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1620 *to_dealloc_id_p = new_id; // save new id for later delete |
| 0 | 1621 } |
| 1622 return id; | |
| 1623 } | |
| 1624 | |
| 1625 | |
|
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1626 // Common code to get the jmethodID cache length and the jmethodID |
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1627 // value at index idnum if there is one. |
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1628 // |
|
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1629 void InstanceKlass::get_jmethod_id_length_value(jmethodID* cache, |
|
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1630 size_t idnum, size_t *length_p, jmethodID* id_p) { |
|
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1631 assert(cache != NULL, "sanity check"); |
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1632 assert(length_p != NULL, "sanity check"); |
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1633 assert(id_p != NULL, "sanity check"); |
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1634 |
|
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1635 // cache size is stored in element[0], other elements offset by one |
|
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1636 *length_p = (size_t)cache[0]; |
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1637 if (*length_p <= idnum) { // cache is too short |
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1638 *id_p = NULL; |
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1639 } else { |
|
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1640 *id_p = cache[idnum+1]; // fetch jmethodID (if any) |
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1641 } |
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1642 } |
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1643 |
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1644 |
| 0 | 1645 // Lookup a jmethodID, NULL if not found. Do no blocking, no allocations, no handles |
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1646 jmethodID InstanceKlass::jmethod_id_or_null(Method* method) { |
| 0 | 1647 size_t idnum = (size_t)method->method_idnum(); |
| 1648 jmethodID* jmeths = methods_jmethod_ids_acquire(); | |
| 1649 size_t length; // length assigned as debugging crumb | |
| 1650 jmethodID id = NULL; | |
|
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1651 if (jmeths != NULL && // If there is a cache |
| 0 | 1652 (length = (size_t)jmeths[0]) > idnum) { // and if it is long enough, |
| 1653 id = jmeths[idnum+1]; // Look up the id (may be NULL) | |
| 1654 } | |
| 1655 return id; | |
| 1656 } | |
| 1657 | |
| 1658 | |
| 1659 // Cache an itable index | |
|
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1660 void InstanceKlass::set_cached_itable_index(size_t idnum, int index) { |
| 0 | 1661 int* indices = methods_cached_itable_indices_acquire(); |
|
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1662 int* to_dealloc_indices = NULL; |
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1663 |
|
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1664 // We use a double-check locking idiom here because this cache is |
|
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1665 // performance sensitive. In the normal system, this cache only |
|
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1666 // transitions from NULL to non-NULL which is safe because we use |
|
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1667 // release_set_methods_cached_itable_indices() to advertise the |
|
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1668 // new cache. A partially constructed cache should never be seen |
|
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1669 // by a racing thread. Cache reads and writes proceed without a |
|
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1670 // lock, but creation of the cache itself requires no leaks so a |
|
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1671 // lock is generally acquired in that case. |
|
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1672 // |
|
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1673 // If the RedefineClasses() API has been used, then this cache can |
|
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1674 // grow and we'll have transitions from non-NULL to bigger non-NULL. |
|
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1675 // Cache creation requires no leaks and we require safety between all |
|
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1676 // cache accesses and freeing of the old cache so a lock is generally |
|
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|
1677 // acquired when the RedefineClasses() API has been used. |
|
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1678 |
|
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|
1679 if (indices == NULL || idnum_can_increment()) { |
|
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1680 // we need a cache or the cache can grow |
| 0 | 1681 MutexLocker ml(JNICachedItableIndex_lock); |
|
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1682 // reacquire the cache to see if another thread already did the work |
| 0 | 1683 indices = methods_cached_itable_indices_acquire(); |
| 1684 size_t length = 0; | |
|
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1685 // cache size is stored in element[0], other elements offset by one |
| 0 | 1686 if (indices == NULL || (length = (size_t)indices[0]) <= idnum) { |
| 1687 size_t size = MAX2(idnum+1, (size_t)idnum_allocated_count()); | |
| 6197 | 1688 int* new_indices = NEW_C_HEAP_ARRAY(int, size+1, mtClass); |
|
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1689 new_indices[0] = (int)size; |
|
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1690 // copy any existing entries |
| 0 | 1691 size_t i; |
| 1692 for (i = 0; i < length; i++) { | |
| 1693 new_indices[i+1] = indices[i+1]; | |
| 1694 } | |
| 1695 // Set all the rest to -1 | |
| 1696 for (i = length; i < size; i++) { | |
| 1697 new_indices[i+1] = -1; | |
| 1698 } | |
| 1699 if (indices != NULL) { | |
|
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1700 // We have an old cache to delete so save it for after we |
|
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|
1701 // drop the lock. |
|
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1702 to_dealloc_indices = indices; |
| 0 | 1703 } |
| 1704 release_set_methods_cached_itable_indices(indices = new_indices); | |
| 1705 } | |
|
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1706 |
|
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1707 if (idnum_can_increment()) { |
|
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1708 // this cache can grow so we have to write to it safely |
|
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1709 indices[idnum+1] = index; |
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1710 } |
| 0 | 1711 } else { |
| 1712 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); | |
| 1713 } | |
|
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1714 |
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1715 if (!idnum_can_increment()) { |
|
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1716 // The cache cannot grow and this JNI itable index value does not |
|
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1717 // have to be unique like a jmethodID. If there is a race to set it, |
|
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1718 // it doesn't matter. |
|
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|
1719 indices[idnum+1] = index; |
|
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1720 } |
|
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1721 |
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1722 if (to_dealloc_indices != NULL) { |
|
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1723 // we allocated a new cache so free the old one |
|
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|
1724 FreeHeap(to_dealloc_indices); |
|
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1725 } |
| 0 | 1726 } |
| 1727 | |
| 1728 | |
| 1729 // Retrieve a cached itable index | |
|
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1730 int InstanceKlass::cached_itable_index(size_t idnum) { |
| 0 | 1731 int* indices = methods_cached_itable_indices_acquire(); |
| 1732 if (indices != NULL && ((size_t)indices[0]) > idnum) { | |
| 1733 // indices exist and are long enough, retrieve possible cached | |
| 1734 return indices[idnum+1]; | |
| 1735 } | |
| 1736 return -1; | |
| 1737 } | |
| 1738 | |
| 1739 | |
| 1740 // | |
| 1741 // Walk the list of dependent nmethods searching for nmethods which | |
|
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1742 // are dependent on the changes that were passed in and mark them for |
| 0 | 1743 // deoptimization. Returns the number of nmethods found. |
| 1744 // | |
|
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1745 int InstanceKlass::mark_dependent_nmethods(DepChange& changes) { |
| 0 | 1746 assert_locked_or_safepoint(CodeCache_lock); |
| 1747 int found = 0; | |
| 1748 nmethodBucket* b = _dependencies; | |
| 1749 while (b != NULL) { | |
| 1750 nmethod* nm = b->get_nmethod(); | |
| 1751 // since dependencies aren't removed until an nmethod becomes a zombie, | |
| 1752 // the dependency list may contain nmethods which aren't alive. | |
| 1753 if (nm->is_alive() && !nm->is_marked_for_deoptimization() && nm->check_dependency_on(changes)) { | |
| 1754 if (TraceDependencies) { | |
| 1755 ResourceMark rm; | |
| 1756 tty->print_cr("Marked for deoptimization"); | |
| 1757 tty->print_cr(" context = %s", this->external_name()); | |
| 1758 changes.print(); | |
| 1759 nm->print(); | |
| 1760 nm->print_dependencies(); | |
| 1761 } | |
| 1762 nm->mark_for_deoptimization(); | |
| 1763 found++; | |
| 1764 } | |
| 1765 b = b->next(); | |
| 1766 } | |
| 1767 return found; | |
| 1768 } | |
| 1769 | |
| 1770 | |
| 1771 // | |
| 1772 // Add an nmethodBucket to the list of dependencies for this nmethod. | |
| 1773 // It's possible that an nmethod has multiple dependencies on this klass | |
| 1774 // so a count is kept for each bucket to guarantee that creation and | |
| 1775 // deletion of dependencies is consistent. | |
| 1776 // | |
|
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1777 void InstanceKlass::add_dependent_nmethod(nmethod* nm) { |
| 0 | 1778 assert_locked_or_safepoint(CodeCache_lock); |
| 1779 nmethodBucket* b = _dependencies; | |
| 1780 nmethodBucket* last = NULL; | |
| 1781 while (b != NULL) { | |
| 1782 if (nm == b->get_nmethod()) { | |
| 1783 b->increment(); | |
| 1784 return; | |
| 1785 } | |
| 1786 b = b->next(); | |
| 1787 } | |
| 1788 _dependencies = new nmethodBucket(nm, _dependencies); | |
| 1789 } | |
| 1790 | |
| 1791 | |
| 1792 // | |
| 1793 // Decrement count of the nmethod in the dependency list and remove | |
| 1794 // the bucket competely when the count goes to 0. This method must | |
| 1795 // find a corresponding bucket otherwise there's a bug in the | |
| 1796 // recording of dependecies. | |
| 1797 // | |
|
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1798 void InstanceKlass::remove_dependent_nmethod(nmethod* nm) { |
| 0 | 1799 assert_locked_or_safepoint(CodeCache_lock); |
| 1800 nmethodBucket* b = _dependencies; | |
| 1801 nmethodBucket* last = NULL; | |
| 1802 while (b != NULL) { | |
| 1803 if (nm == b->get_nmethod()) { | |
| 1804 if (b->decrement() == 0) { | |
| 1805 if (last == NULL) { | |
| 1806 _dependencies = b->next(); | |
| 1807 } else { | |
| 1808 last->set_next(b->next()); | |
| 1809 } | |
| 1810 delete b; | |
| 1811 } | |
| 1812 return; | |
| 1813 } | |
| 1814 last = b; | |
| 1815 b = b->next(); | |
| 1816 } | |
| 1817 #ifdef ASSERT | |
| 1818 tty->print_cr("### %s can't find dependent nmethod:", this->external_name()); | |
| 1819 nm->print(); | |
| 1820 #endif // ASSERT | |
| 1821 ShouldNotReachHere(); | |
| 1822 } | |
| 1823 | |
| 1824 | |
| 1825 #ifndef PRODUCT | |
|
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1826 void InstanceKlass::print_dependent_nmethods(bool verbose) { |
| 0 | 1827 nmethodBucket* b = _dependencies; |
| 1828 int idx = 0; | |
| 1829 while (b != NULL) { | |
| 1830 nmethod* nm = b->get_nmethod(); | |
| 1831 tty->print("[%d] count=%d { ", idx++, b->count()); | |
| 1832 if (!verbose) { | |
| 1833 nm->print_on(tty, "nmethod"); | |
| 1834 tty->print_cr(" } "); | |
| 1835 } else { | |
| 1836 nm->print(); | |
| 1837 nm->print_dependencies(); | |
| 1838 tty->print_cr("--- } "); | |
| 1839 } | |
| 1840 b = b->next(); | |
| 1841 } | |
| 1842 } | |
| 1843 | |
| 1844 | |
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1845 bool InstanceKlass::is_dependent_nmethod(nmethod* nm) { |
| 0 | 1846 nmethodBucket* b = _dependencies; |
| 1847 while (b != NULL) { | |
| 1848 if (nm == b->get_nmethod()) { | |
| 1849 return true; | |
| 1850 } | |
| 1851 b = b->next(); | |
| 1852 } | |
| 1853 return false; | |
| 1854 } | |
| 1855 #endif //PRODUCT | |
| 1856 | |
| 1857 | |
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1858 // Garbage collection |
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1859 |
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1860 void InstanceKlass::oops_do(OopClosure* cl) { |
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1861 Klass::oops_do(cl); |
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1862 |
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1863 cl->do_oop(adr_protection_domain()); |
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1864 cl->do_oop(adr_signers()); |
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1865 cl->do_oop(adr_init_lock()); |
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1866 |
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1867 // Don't walk the arrays since they are walked from the ClassLoaderData objects. |
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1868 } |
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1869 |
|
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1870 #ifdef ASSERT |
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1871 template <class T> void assert_is_in(T *p) { |
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1872 T heap_oop = oopDesc::load_heap_oop(p); |
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1873 if (!oopDesc::is_null(heap_oop)) { |
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1874 oop o = oopDesc::decode_heap_oop_not_null(heap_oop); |
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1875 assert(Universe::heap()->is_in(o), "should be in heap"); |
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1876 } |
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1877 } |
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1878 template <class T> void assert_is_in_closed_subset(T *p) { |
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1879 T heap_oop = oopDesc::load_heap_oop(p); |
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1880 if (!oopDesc::is_null(heap_oop)) { |
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1881 oop o = oopDesc::decode_heap_oop_not_null(heap_oop); |
|
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1882 assert(Universe::heap()->is_in_closed_subset(o), |
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1883 err_msg("should be in closed *p " INTPTR_FORMAT " " INTPTR_FORMAT, (address)p, (address)o)); |
|
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1884 } |
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1885 } |
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1886 template <class T> void assert_is_in_reserved(T *p) { |
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1887 T heap_oop = oopDesc::load_heap_oop(p); |
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1888 if (!oopDesc::is_null(heap_oop)) { |
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1889 oop o = oopDesc::decode_heap_oop_not_null(heap_oop); |
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1890 assert(Universe::heap()->is_in_reserved(o), "should be in reserved"); |
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1891 } |
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1892 } |
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1893 template <class T> void assert_nothing(T *p) {} |
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1894 |
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1895 #else |
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1896 template <class T> void assert_is_in(T *p) {} |
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1897 template <class T> void assert_is_in_closed_subset(T *p) {} |
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1898 template <class T> void assert_is_in_reserved(T *p) {} |
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1899 template <class T> void assert_nothing(T *p) {} |
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1900 #endif // ASSERT |
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1901 |
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1902 // |
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1903 // Macros that iterate over areas of oops which are specialized on type of |
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1904 // oop pointer either narrow or wide, depending on UseCompressedOops |
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1905 // |
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1906 // Parameters are: |
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1907 // T - type of oop to point to (either oop or narrowOop) |
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1908 // start_p - starting pointer for region to iterate over |
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1909 // count - number of oops or narrowOops to iterate over |
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1910 // do_oop - action to perform on each oop (it's arbitrary C code which |
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1911 // makes it more efficient to put in a macro rather than making |
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1912 // it a template function) |
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1913 // assert_fn - assert function which is template function because performance |
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1914 // doesn't matter when enabled. |
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1915 #define InstanceKlass_SPECIALIZED_OOP_ITERATE( \ |
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1916 T, start_p, count, do_oop, \ |
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1917 assert_fn) \ |
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1918 { \ |
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1919 T* p = (T*)(start_p); \ |
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1920 T* const end = p + (count); \ |
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1921 while (p < end) { \ |
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1922 (assert_fn)(p); \ |
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1923 do_oop; \ |
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1924 ++p; \ |
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1925 } \ |
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1926 } |
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1927 |
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1928 #define InstanceKlass_SPECIALIZED_OOP_REVERSE_ITERATE( \ |
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1929 T, start_p, count, do_oop, \ |
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1930 assert_fn) \ |
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1931 { \ |
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1932 T* const start = (T*)(start_p); \ |
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1933 T* p = start + (count); \ |
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1934 while (start < p) { \ |
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1935 --p; \ |
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1936 (assert_fn)(p); \ |
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1937 do_oop; \ |
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1938 } \ |
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1939 } |
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1940 |
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1941 #define InstanceKlass_SPECIALIZED_BOUNDED_OOP_ITERATE( \ |
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1942 T, start_p, count, low, high, \ |
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1943 do_oop, assert_fn) \ |
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1944 { \ |
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1945 T* const l = (T*)(low); \ |
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1946 T* const h = (T*)(high); \ |
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1947 assert(mask_bits((intptr_t)l, sizeof(T)-1) == 0 && \ |
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1948 mask_bits((intptr_t)h, sizeof(T)-1) == 0, \ |
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1949 "bounded region must be properly aligned"); \ |
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1950 T* p = (T*)(start_p); \ |
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1951 T* end = p + (count); \ |
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1952 if (p < l) p = l; \ |
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1953 if (end > h) end = h; \ |
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1954 while (p < end) { \ |
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1955 (assert_fn)(p); \ |
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1956 do_oop; \ |
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1957 ++p; \ |
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1958 } \ |
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1959 } |
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1960 |
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1961 |
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1962 // The following macros call specialized macros, passing either oop or |
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1963 // narrowOop as the specialization type. These test the UseCompressedOops |
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1964 // flag. |
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1965 #define InstanceKlass_OOP_MAP_ITERATE(obj, do_oop, assert_fn) \ |
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1966 { \ |
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1967 /* Compute oopmap block range. The common case \ |
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1968 is nonstatic_oop_map_size == 1. */ \ |
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1969 OopMapBlock* map = start_of_nonstatic_oop_maps(); \ |
| 938 | 1970 OopMapBlock* const end_map = map + nonstatic_oop_map_count(); \ |
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1971 if (UseCompressedOops) { \ |
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1972 while (map < end_map) { \ |
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1973 InstanceKlass_SPECIALIZED_OOP_ITERATE(narrowOop, \ |
| 938 | 1974 obj->obj_field_addr<narrowOop>(map->offset()), map->count(), \ |
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1975 do_oop, assert_fn) \ |
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1976 ++map; \ |
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1977 } \ |
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1978 } else { \ |
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1979 while (map < end_map) { \ |
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1980 InstanceKlass_SPECIALIZED_OOP_ITERATE(oop, \ |
| 938 | 1981 obj->obj_field_addr<oop>(map->offset()), map->count(), \ |
|
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1982 do_oop, assert_fn) \ |
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1983 ++map; \ |
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1984 } \ |
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1985 } \ |
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1986 } |
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1987 |
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1988 #define InstanceKlass_OOP_MAP_REVERSE_ITERATE(obj, do_oop, assert_fn) \ |
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1989 { \ |
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1990 OopMapBlock* const start_map = start_of_nonstatic_oop_maps(); \ |
| 938 | 1991 OopMapBlock* map = start_map + nonstatic_oop_map_count(); \ |
|
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1992 if (UseCompressedOops) { \ |
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1993 while (start_map < map) { \ |
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1994 --map; \ |
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1995 InstanceKlass_SPECIALIZED_OOP_REVERSE_ITERATE(narrowOop, \ |
| 938 | 1996 obj->obj_field_addr<narrowOop>(map->offset()), map->count(), \ |
|
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1997 do_oop, assert_fn) \ |
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1998 } \ |
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1999 } else { \ |
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2000 while (start_map < map) { \ |
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2001 --map; \ |
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2002 InstanceKlass_SPECIALIZED_OOP_REVERSE_ITERATE(oop, \ |
| 938 | 2003 obj->obj_field_addr<oop>(map->offset()), map->count(), \ |
|
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2004 do_oop, assert_fn) \ |
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2005 } \ |
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2006 } \ |
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2007 } |
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2008 |
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2009 #define InstanceKlass_BOUNDED_OOP_MAP_ITERATE(obj, low, high, do_oop, \ |
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2010 assert_fn) \ |
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2011 { \ |
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2012 /* Compute oopmap block range. The common case is \ |
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2013 nonstatic_oop_map_size == 1, so we accept the \ |
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2014 usually non-existent extra overhead of examining \ |
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2015 all the maps. */ \ |
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2016 OopMapBlock* map = start_of_nonstatic_oop_maps(); \ |
| 938 | 2017 OopMapBlock* const end_map = map + nonstatic_oop_map_count(); \ |
|
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2018 if (UseCompressedOops) { \ |
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2019 while (map < end_map) { \ |
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2020 InstanceKlass_SPECIALIZED_BOUNDED_OOP_ITERATE(narrowOop, \ |
| 938 | 2021 obj->obj_field_addr<narrowOop>(map->offset()), map->count(), \ |
|
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2022 low, high, \ |
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2023 do_oop, assert_fn) \ |
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2024 ++map; \ |
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2025 } \ |
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2026 } else { \ |
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2027 while (map < end_map) { \ |
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2028 InstanceKlass_SPECIALIZED_BOUNDED_OOP_ITERATE(oop, \ |
| 938 | 2029 obj->obj_field_addr<oop>(map->offset()), map->count(), \ |
|
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2030 low, high, \ |
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2031 do_oop, assert_fn) \ |
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2032 ++map; \ |
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2033 } \ |
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2034 } \ |
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2035 } |
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2036 |
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2037 void InstanceKlass::oop_follow_contents(oop obj) { |
|
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2038 assert(obj != NULL, "can't follow the content of NULL object"); |
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2039 MarkSweep::follow_klass(obj->klass()); |
|
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2040 InstanceKlass_OOP_MAP_ITERATE( \ |
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2041 obj, \ |
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2042 MarkSweep::mark_and_push(p), \ |
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2043 assert_is_in_closed_subset) |
| 0 | 2044 } |
| 2045 | |
|
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2046 #if INCLUDE_ALL_GCS |
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2047 void InstanceKlass::oop_follow_contents(ParCompactionManager* cm, |
| 0 | 2048 oop obj) { |
|
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2049 assert(obj != NULL, "can't follow the content of NULL object"); |
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2050 PSParallelCompact::follow_klass(cm, obj->klass()); |
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2051 // Only mark the header and let the scan of the meta-data mark |
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2052 // everything else. |
|
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2053 InstanceKlass_OOP_MAP_ITERATE( \ |
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2054 obj, \ |
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2055 PSParallelCompact::mark_and_push(cm, p), \ |
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2056 assert_is_in) |
| 0 | 2057 } |
|
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2058 #endif // INCLUDE_ALL_GCS |
| 0 | 2059 |
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2060 // closure's do_metadata() method dictates whether the given closure should be |
| 0 | 2061 // applied to the klass ptr in the object header. |
| 2062 | |
|
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2063 #define if_do_metadata_checked(closure, nv_suffix) \ |
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2064 /* Make sure the non-virtual and the virtual versions match. */ \ |
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2065 assert(closure->do_metadata##nv_suffix() == closure->do_metadata(), \ |
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2066 "Inconsistency in do_metadata"); \ |
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2067 if (closure->do_metadata##nv_suffix()) |
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2068 |
|
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2069 #define InstanceKlass_OOP_OOP_ITERATE_DEFN(OopClosureType, nv_suffix) \ |
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2070 \ |
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2071 int InstanceKlass::oop_oop_iterate##nv_suffix(oop obj, OopClosureType* closure) { \ |
|
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2072 SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::ik);\ |
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2073 /* header */ \ |
|
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2074 if_do_metadata_checked(closure, nv_suffix) { \ |
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2075 closure->do_klass##nv_suffix(obj->klass()); \ |
|
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2076 } \ |
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2077 InstanceKlass_OOP_MAP_ITERATE( \ |
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2078 obj, \ |
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2079 SpecializationStats:: \ |
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2080 record_do_oop_call##nv_suffix(SpecializationStats::ik); \ |
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2081 (closure)->do_oop##nv_suffix(p), \ |
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2082 assert_is_in_closed_subset) \ |
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2083 return size_helper(); \ |
| 0 | 2084 } |
| 2085 | |
|
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2086 #if INCLUDE_ALL_GCS |
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2087 #define InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DEFN(OopClosureType, nv_suffix) \ |
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2088 \ |
|
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2089 int InstanceKlass::oop_oop_iterate_backwards##nv_suffix(oop obj, \ |
|
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2090 OopClosureType* closure) { \ |
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2091 SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::ik); \ |
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2092 /* header */ \ |
|
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2093 if_do_metadata_checked(closure, nv_suffix) { \ |
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2094 closure->do_klass##nv_suffix(obj->klass()); \ |
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2095 } \ |
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2096 /* instance variables */ \ |
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2097 InstanceKlass_OOP_MAP_REVERSE_ITERATE( \ |
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2098 obj, \ |
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2099 SpecializationStats::record_do_oop_call##nv_suffix(SpecializationStats::ik);\ |
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2100 (closure)->do_oop##nv_suffix(p), \ |
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2101 assert_is_in_closed_subset) \ |
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2102 return size_helper(); \ |
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2103 } |
|
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2104 #endif // INCLUDE_ALL_GCS |
|
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2105 |
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2106 #define InstanceKlass_OOP_OOP_ITERATE_DEFN_m(OopClosureType, nv_suffix) \ |
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2107 \ |
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2108 int InstanceKlass::oop_oop_iterate##nv_suffix##_m(oop obj, \ |
|
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2109 OopClosureType* closure, \ |
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2110 MemRegion mr) { \ |
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2111 SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::ik);\ |
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2112 if_do_metadata_checked(closure, nv_suffix) { \ |
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2113 if (mr.contains(obj)) { \ |
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2114 closure->do_klass##nv_suffix(obj->klass()); \ |
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2115 } \ |
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2116 } \ |
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2117 InstanceKlass_BOUNDED_OOP_MAP_ITERATE( \ |
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2118 obj, mr.start(), mr.end(), \ |
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2119 (closure)->do_oop##nv_suffix(p), \ |
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2120 assert_is_in_closed_subset) \ |
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2121 return size_helper(); \ |
| 0 | 2122 } |
| 2123 | |
| 2124 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_DEFN) | |
|
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2125 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_DEFN) |
| 0 | 2126 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_DEFN_m) |
|
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2127 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_DEFN_m) |
|
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2128 #if INCLUDE_ALL_GCS |
|
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2129 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DEFN) |
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2130 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DEFN) |
|
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2131 #endif // INCLUDE_ALL_GCS |
| 0 | 2132 |
|
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2133 int InstanceKlass::oop_adjust_pointers(oop obj) { |
| 0 | 2134 int size = size_helper(); |
|
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2135 InstanceKlass_OOP_MAP_ITERATE( \ |
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2136 obj, \ |
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2137 MarkSweep::adjust_pointer(p), \ |
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2138 assert_is_in) |
|
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2139 MarkSweep::adjust_klass(obj->klass()); |
| 0 | 2140 return size; |
| 2141 } | |
| 2142 | |
|
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2143 #if INCLUDE_ALL_GCS |
|
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2144 void InstanceKlass::oop_push_contents(PSPromotionManager* pm, oop obj) { |
|
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2145 InstanceKlass_OOP_MAP_REVERSE_ITERATE( \ |
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2146 obj, \ |
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2147 if (PSScavenge::should_scavenge(p)) { \ |
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2148 pm->claim_or_forward_depth(p); \ |
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|
2149 }, \ |
|
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|
2150 assert_nothing ) |
| 0 | 2151 } |
| 2152 | |
|
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2153 int InstanceKlass::oop_update_pointers(ParCompactionManager* cm, oop obj) { |
|
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2154 int size = size_helper(); |
|
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2155 InstanceKlass_OOP_MAP_ITERATE( \ |
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2156 obj, \ |
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2157 PSParallelCompact::adjust_pointer(p), \ |
|
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|
2158 assert_is_in) |
|
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|
2159 obj->update_header(cm); |
|
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2160 return size; |
| 0 | 2161 } |
| 2162 | |
|
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|
2163 #endif // INCLUDE_ALL_GCS |
| 0 | 2164 |
|
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2165 void InstanceKlass::clean_implementors_list(BoolObjectClosure* is_alive) { |
|
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2166 assert(is_loader_alive(is_alive), "this klass should be live"); |
|
5998
49036505ab5f
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|
2167 if (is_interface()) { |
|
49036505ab5f
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|
2168 if (ClassUnloading) { |
|
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|
2169 Klass* impl = implementor(); |
|
5998
49036505ab5f
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|
2170 if (impl != NULL) { |
|
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2171 if (!impl->is_loader_alive(is_alive)) { |
|
5998
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|
2172 // remove this guy |
|
6038
8bafad97cd26
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|
2173 *adr_implementor() = NULL; |
|
5998
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|
2174 } |
| 0 | 2175 } |
|
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2176 } |
|
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2177 } |
|
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2178 } |
|
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2179 |
|
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|
2180 void InstanceKlass::clean_method_data(BoolObjectClosure* is_alive) { |
|
6950
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|
2181 #if defined(COMPILER2) || defined(GRAAL) |
|
7154
5d0bb7d52783
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|
2182 // Currently only used by C2 and Graal |
|
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2183 for (int m = 0; m < methods()->length(); m++) { |
|
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2184 MethodData* mdo = methods()->at(m)->method_data(); |
|
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2185 if (mdo != NULL) { |
|
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2186 for (ProfileData* data = mdo->first_data(); |
|
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2187 mdo->is_valid(data); |
|
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2188 data = mdo->next_data(data)) { |
|
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2189 data->clean_weak_klass_links(is_alive); |
|
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2190 } |
| 0 | 2191 } |
| 2192 } | |
|
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2193 #else |
|
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2194 #ifdef ASSERT |
|
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2195 // Verify that we haven't started to use MDOs for C1. |
|
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2196 for (int m = 0; m < methods()->length(); m++) { |
|
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2197 MethodData* mdo = methods()->at(m)->method_data(); |
|
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2198 assert(mdo == NULL, "Didn't expect C1 to use MDOs"); |
|
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|
2199 } |
|
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|
2200 #endif // ASSERT |
|
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|
2201 #endif // !COMPILER2 |
|
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2202 } |
|
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2203 |
|
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2204 |
|
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|
2205 static void remove_unshareable_in_class(Klass* k) { |
|
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2206 // remove klass's unshareable info |
|
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2207 k->remove_unshareable_info(); |
|
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2208 } |
|
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|
2209 |
|
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2210 void InstanceKlass::remove_unshareable_info() { |
|
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|
2211 Klass::remove_unshareable_info(); |
|
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2212 // Unlink the class |
|
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|
2213 if (is_linked()) { |
|
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|
2214 unlink_class(); |
|
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|
2215 } |
|
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2216 init_implementor(); |
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2217 |
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2218 constants()->remove_unshareable_info(); |
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2219 |
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2220 for (int i = 0; i < methods()->length(); i++) { |
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2221 Method* m = methods()->at(i); |
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2222 m->remove_unshareable_info(); |
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2223 } |
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2224 |
|
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2225 // Need to reinstate when reading back the class. |
|
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2226 set_init_lock(NULL); |
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2227 |
|
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2228 // do array classes also. |
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2229 array_klasses_do(remove_unshareable_in_class); |
| 0 | 2230 } |
| 2231 | |
|
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2232 void restore_unshareable_in_class(Klass* k, TRAPS) { |
|
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2233 k->restore_unshareable_info(CHECK); |
| 0 | 2234 } |
| 2235 | |
|
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2236 void InstanceKlass::restore_unshareable_info(TRAPS) { |
|
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2237 Klass::restore_unshareable_info(CHECK); |
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2238 instanceKlassHandle ik(THREAD, this); |
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2239 |
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2240 Array<Method*>* methods = ik->methods(); |
|
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2241 int num_methods = methods->length(); |
|
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2242 for (int index2 = 0; index2 < num_methods; ++index2) { |
|
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2243 methodHandle m(THREAD, methods->at(index2)); |
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2244 m()->link_method(m, CHECK); |
|
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2245 // restore method's vtable by calling a virtual function |
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2246 m->restore_vtable(); |
|
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2247 } |
|
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2248 if (JvmtiExport::has_redefined_a_class()) { |
|
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2249 // Reinitialize vtable because RedefineClasses may have changed some |
|
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2250 // entries in this vtable for super classes so the CDS vtable might |
|
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2251 // point to old or obsolete entries. RedefineClasses doesn't fix up |
|
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2252 // vtables in the shared system dictionary, only the main one. |
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2253 // It also redefines the itable too so fix that too. |
|
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2254 ResourceMark rm(THREAD); |
|
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2255 ik->vtable()->initialize_vtable(false, CHECK); |
|
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2256 ik->itable()->initialize_itable(false, CHECK); |
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2257 } |
|
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2258 |
|
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2259 // Allocate a simple java object for a lock. |
|
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2260 // This needs to be a java object because during class initialization |
|
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2261 // it can be held across a java call. |
|
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2262 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK); |
|
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2263 Handle h(THREAD, (oop)r); |
|
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2264 ik->set_init_lock(h()); |
|
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2265 |
|
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|
2266 // restore constant pool resolved references |
|
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|
2267 ik->constants()->restore_unshareable_info(CHECK); |
|
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2268 |
|
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|
2269 ik->array_klasses_do(restore_unshareable_in_class, CHECK); |
|
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|
2270 } |
|
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|
2271 |
|
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2272 static void clear_all_breakpoints(Method* m) { |
| 0 | 2273 m->clear_all_breakpoints(); |
| 2274 } | |
| 2275 | |
|
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2276 void InstanceKlass::release_C_heap_structures() { |
| 0 | 2277 // Deallocate oop map cache |
| 2278 if (_oop_map_cache != NULL) { | |
| 2279 delete _oop_map_cache; | |
| 2280 _oop_map_cache = NULL; | |
| 2281 } | |
| 2282 | |
| 2283 // Deallocate JNI identifiers for jfieldIDs | |
| 2284 JNIid::deallocate(jni_ids()); | |
| 2285 set_jni_ids(NULL); | |
| 2286 | |
| 2287 jmethodID* jmeths = methods_jmethod_ids_acquire(); | |
| 2288 if (jmeths != (jmethodID*)NULL) { | |
| 2289 release_set_methods_jmethod_ids(NULL); | |
| 2290 FreeHeap(jmeths); | |
| 2291 } | |
| 2292 | |
| 2293 int* indices = methods_cached_itable_indices_acquire(); | |
| 2294 if (indices != (int*)NULL) { | |
| 2295 release_set_methods_cached_itable_indices(NULL); | |
| 2296 FreeHeap(indices); | |
| 2297 } | |
| 2298 | |
| 2299 // release dependencies | |
| 2300 nmethodBucket* b = _dependencies; | |
| 2301 _dependencies = NULL; | |
| 2302 while (b != NULL) { | |
| 2303 nmethodBucket* next = b->next(); | |
| 2304 delete b; | |
| 2305 b = next; | |
| 2306 } | |
| 2307 | |
| 2308 // Deallocate breakpoint records | |
| 2309 if (breakpoints() != 0x0) { | |
| 2310 methods_do(clear_all_breakpoints); | |
| 2311 assert(breakpoints() == 0x0, "should have cleared breakpoints"); | |
| 2312 } | |
| 2313 | |
| 2314 // deallocate information about previous versions | |
| 2315 if (_previous_versions != NULL) { | |
| 2316 for (int i = _previous_versions->length() - 1; i >= 0; i--) { | |
| 2317 PreviousVersionNode * pv_node = _previous_versions->at(i); | |
| 2318 delete pv_node; | |
| 2319 } | |
| 2320 delete _previous_versions; | |
| 2321 _previous_versions = NULL; | |
| 2322 } | |
| 2323 | |
| 2324 // deallocate the cached class file | |
| 2325 if (_cached_class_file_bytes != NULL) { | |
| 6197 | 2326 os::free(_cached_class_file_bytes, mtClass); |
| 0 | 2327 _cached_class_file_bytes = NULL; |
| 2328 _cached_class_file_len = 0; | |
| 2329 } | |
|
2177
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|
2330 |
|
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|
2331 // Decrement symbol reference counts associated with the unloaded class. |
|
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|
2332 if (_name != NULL) _name->decrement_refcount(); |
|
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|
2333 // unreference array name derived from this class name (arrays of an unloaded |
|
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|
2334 // class can't be referenced anymore). |
|
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|
2335 if (_array_name != NULL) _array_name->decrement_refcount(); |
|
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|
2336 if (_source_file_name != NULL) _source_file_name->decrement_refcount(); |
|
6203
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|
2337 if (_source_debug_extension != NULL) FREE_C_HEAP_ARRAY(char, _source_debug_extension, mtClass); |
|
7464
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8005048: NMT: #loaded classes needs to just show the # defined classes
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|
2338 |
|
ecd24264898b
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|
2339 assert(_total_instanceKlass_count >= 1, "Sanity check"); |
|
ecd24264898b
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|
2340 Atomic::dec(&_total_instanceKlass_count); |
|
2177
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|
2341 } |
|
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|
2342 |
|
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|
2343 void InstanceKlass::set_source_file_name(Symbol* n) { |
|
2177
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|
2344 _source_file_name = n; |
|
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|
2345 if (_source_file_name != NULL) _source_file_name->increment_refcount(); |
|
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|
2346 } |
|
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|
2347 |
|
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|
2348 void InstanceKlass::set_source_debug_extension(char* array, int length) { |
|
6203
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|
2349 if (array == NULL) { |
|
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|
2350 _source_debug_extension = NULL; |
|
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|
2351 } else { |
|
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|
2352 // Adding one to the attribute length in order to store a null terminator |
|
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|
2353 // character could cause an overflow because the attribute length is |
|
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|
2354 // already coded with an u4 in the classfile, but in practice, it's |
|
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|
2355 // unlikely to happen. |
|
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|
2356 assert((length+1) > length, "Overflow checking"); |
|
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|
2357 char* sde = NEW_C_HEAP_ARRAY(char, (length + 1), mtClass); |
|
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|
2358 for (int i = 0; i < length; i++) { |
|
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|
2359 sde[i] = array[i]; |
|
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|
2360 } |
|
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|
2361 sde[length] = '\0'; |
|
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|
2362 _source_debug_extension = sde; |
|
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|
2363 } |
| 0 | 2364 } |
| 2365 | |
|
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|
2366 address InstanceKlass::static_field_addr(int offset) { |
|
6735
aed758eda82a
7195833: NPG: Rename instanceClassLoaderKlass, instanceRefKlass and instanceMirrorKlass
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|
2367 return (address)(offset + InstanceMirrorKlass::offset_of_static_fields() + (intptr_t)java_mirror()); |
|
2376
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
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|
2368 } |
|
c7f3d0b4570f
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|
2369 |
|
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|
2370 |
|
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|
2371 const char* InstanceKlass::signature_name() const { |
| 0 | 2372 const char* src = (const char*) (name()->as_C_string()); |
| 2373 const int src_length = (int)strlen(src); | |
| 2374 char* dest = NEW_RESOURCE_ARRAY(char, src_length + 3); | |
| 2375 int src_index = 0; | |
| 2376 int dest_index = 0; | |
| 2377 dest[dest_index++] = 'L'; | |
| 2378 while (src_index < src_length) { | |
| 2379 dest[dest_index++] = src[src_index++]; | |
| 2380 } | |
| 2381 dest[dest_index++] = ';'; | |
| 2382 dest[dest_index] = '\0'; | |
| 2383 return dest; | |
| 2384 } | |
| 2385 | |
| 2386 // different verisons of is_same_class_package | |
|
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|
2387 bool InstanceKlass::is_same_class_package(Klass* class2) { |
|
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|
2388 Klass* class1 = this; |
|
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|
2389 oop classloader1 = InstanceKlass::cast(class1)->class_loader(); |
| 6983 | 2390 Symbol* classname1 = class1->name(); |
| 2391 | |
| 2392 if (class2->oop_is_objArray()) { | |
|
6831
d8ce2825b193
8000213: NPG: Should have renamed arrayKlass and typeArrayKlass
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|
2393 class2 = ObjArrayKlass::cast(class2)->bottom_klass(); |
| 0 | 2394 } |
| 2395 oop classloader2; | |
| 6983 | 2396 if (class2->oop_is_instance()) { |
|
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|
2397 classloader2 = InstanceKlass::cast(class2)->class_loader(); |
| 0 | 2398 } else { |
| 6983 | 2399 assert(class2->oop_is_typeArray(), "should be type array"); |
| 0 | 2400 classloader2 = NULL; |
| 2401 } | |
| 6983 | 2402 Symbol* classname2 = class2->name(); |
| 0 | 2403 |
|
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|
2404 return InstanceKlass::is_same_class_package(classloader1, classname1, |
| 0 | 2405 classloader2, classname2); |
| 2406 } | |
| 2407 | |
|
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|
2408 bool InstanceKlass::is_same_class_package(oop classloader2, Symbol* classname2) { |
|
da91efe96a93
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|
2409 Klass* class1 = this; |
|
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|
2410 oop classloader1 = InstanceKlass::cast(class1)->class_loader(); |
| 6983 | 2411 Symbol* classname1 = class1->name(); |
| 0 | 2412 |
|
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|
2413 return InstanceKlass::is_same_class_package(classloader1, classname1, |
| 0 | 2414 classloader2, classname2); |
| 2415 } | |
| 2416 | |
| 2417 // return true if two classes are in the same package, classloader | |
| 2418 // and classname information is enough to determine a class's package | |
|
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|
2419 bool InstanceKlass::is_same_class_package(oop class_loader1, Symbol* class_name1, |
|
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diff
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|
2420 oop class_loader2, Symbol* class_name2) { |
| 0 | 2421 if (class_loader1 != class_loader2) { |
| 2422 return false; | |
|
665
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|
2423 } else if (class_name1 == class_name2) { |
|
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|
2424 return true; // skip painful bytewise comparison |
| 0 | 2425 } else { |
| 2426 ResourceMark rm; | |
| 2427 | |
|
2177
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diff
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|
2428 // The Symbol*'s are in UTF8 encoding. Since we only need to check explicitly |
| 0 | 2429 // for ASCII characters ('/', 'L', '['), we can keep them in UTF8 encoding. |
| 2430 // Otherwise, we just compare jbyte values between the strings. | |
|
2177
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diff
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|
2431 const jbyte *name1 = class_name1->base(); |
|
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diff
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|
2432 const jbyte *name2 = class_name2->base(); |
|
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diff
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|
2433 |
|
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
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diff
changeset
|
2434 const jbyte *last_slash1 = UTF8::strrchr(name1, class_name1->utf8_length(), '/'); |
|
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
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diff
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|
2435 const jbyte *last_slash2 = UTF8::strrchr(name2, class_name2->utf8_length(), '/'); |
| 0 | 2436 |
| 2437 if ((last_slash1 == NULL) || (last_slash2 == NULL)) { | |
| 2438 // One of the two doesn't have a package. Only return true | |
| 2439 // if the other one also doesn't have a package. | |
| 2440 return last_slash1 == last_slash2; | |
| 2441 } else { | |
| 2442 // Skip over '['s | |
| 2443 if (*name1 == '[') { | |
| 2444 do { | |
| 2445 name1++; | |
| 2446 } while (*name1 == '['); | |
| 2447 if (*name1 != 'L') { | |
| 2448 // Something is terribly wrong. Shouldn't be here. | |
| 2449 return false; | |
| 2450 } | |
| 2451 } | |
| 2452 if (*name2 == '[') { | |
| 2453 do { | |
| 2454 name2++; | |
| 2455 } while (*name2 == '['); | |
| 2456 if (*name2 != 'L') { | |
| 2457 // Something is terribly wrong. Shouldn't be here. | |
| 2458 return false; | |
| 2459 } | |
| 2460 } | |
| 2461 | |
| 2462 // Check that package part is identical | |
| 2463 int length1 = last_slash1 - name1; | |
| 2464 int length2 = last_slash2 - name2; | |
| 2465 | |
| 2466 return UTF8::equal(name1, length1, name2, length2); | |
| 2467 } | |
| 2468 } | |
| 2469 } | |
| 2470 | |
|
652
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diff
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|
2471 // Returns true iff super_method can be overridden by a method in targetclassname |
|
4aaa9f5e02a8
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acorn
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diff
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|
2472 // See JSL 3rd edition 8.4.6.1 |
|
4aaa9f5e02a8
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acorn
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diff
changeset
|
2473 // Assumes name-signature match |
|
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|
2474 // "this" is InstanceKlass of super_method which must exist |
|
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|
2475 // note that the InstanceKlass of the method in the targetclassname has not always been created yet |
|
da91efe96a93
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|
2476 bool InstanceKlass::is_override(methodHandle super_method, Handle targetclassloader, Symbol* targetclassname, TRAPS) { |
|
652
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605
diff
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|
2477 // Private methods can not be overridden |
|
4aaa9f5e02a8
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diff
changeset
|
2478 if (super_method->is_private()) { |
|
4aaa9f5e02a8
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parents:
605
diff
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|
2479 return false; |
|
4aaa9f5e02a8
4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
acorn
parents:
605
diff
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|
2480 } |
|
4aaa9f5e02a8
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acorn
parents:
605
diff
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|
2481 // If super method is accessible, then override |
|
4aaa9f5e02a8
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acorn
parents:
605
diff
changeset
|
2482 if ((super_method->is_protected()) || |
|
4aaa9f5e02a8
4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
acorn
parents:
605
diff
changeset
|
2483 (super_method->is_public())) { |
|
4aaa9f5e02a8
4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
acorn
parents:
605
diff
changeset
|
2484 return true; |
|
4aaa9f5e02a8
4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
acorn
parents:
605
diff
changeset
|
2485 } |
|
4aaa9f5e02a8
4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
acorn
parents:
605
diff
changeset
|
2486 // Package-private methods are not inherited outside of package |
|
4aaa9f5e02a8
4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
acorn
parents:
605
diff
changeset
|
2487 assert(super_method->is_package_private(), "must be package private"); |
|
2177
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6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
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|
2488 return(is_same_class_package(targetclassloader(), targetclassname)); |
|
652
4aaa9f5e02a8
4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
acorn
parents:
605
diff
changeset
|
2489 } |
| 0 | 2490 |
|
665
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6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2491 /* 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
|
2492 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
|
2493 Symbol*& simple_name_result, TRAPS) { |
|
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2494 ... |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2495 } |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2496 */ |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2497 |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2498 // tell if two classes have the same enclosing class (at package level) |
|
6725
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6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
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|
2499 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
diff
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|
2500 Klass* class2_oop, TRAPS) { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
2501 if (class2_oop == class1()) return true; |
| 6983 | 2502 if (!class2_oop->oop_is_instance()) return false; |
|
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2503 instanceKlassHandle class2(THREAD, class2_oop); |
|
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 // must be in same package before we try anything else |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2506 if (!class1->is_same_class_package(class2->class_loader(), class2->name())) |
|
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 // As long as there is an outer1.getEnclosingClass, |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2510 // shift the search outward. |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2511 instanceKlassHandle outer1 = class1; |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2512 for (;;) { |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2513 // As we walk along, look for equalities between outer1 and class2. |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2514 // Eventually, the walks will terminate as outer1 stops |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2515 // 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
|
2516 bool ignore_inner_is_member; |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
2517 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
|
2518 CHECK_false); |
|
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2519 if (next == NULL) break; |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2520 if (next == class2()) return true; |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2521 outer1 = instanceKlassHandle(THREAD, next); |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2522 } |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2523 |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2524 // Now do the same for class2. |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2525 instanceKlassHandle outer2 = class2; |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2526 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
|
2527 bool ignore_inner_is_member; |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
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|
2528 Klass* next = outer2->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
|
2529 CHECK_false); |
|
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2530 if (next == NULL) break; |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2531 // Might as well check the new outer against all available values. |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2532 if (next == class1()) return true; |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2533 if (next == outer1()) return true; |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2534 outer2 = instanceKlassHandle(THREAD, next); |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2535 } |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2536 |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2537 // 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
|
2538 // two classes, we know they are in separate package members. |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2539 return false; |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2540 } |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2541 |
| 0 | 2542 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
2543 jint InstanceKlass::compute_modifier_flags(TRAPS) const { |
| 0 | 2544 jint access = access_flags().as_int(); |
| 2545 | |
| 2546 // 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
|
2547 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
|
2548 InnerClassesIterator iter(ik); |
|
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
diff
changeset
|
2549 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
|
2550 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
|
2551 // 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
|
2552 // 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
|
2553 if (ioff == 0) continue; |
|
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
diff
changeset
|
2554 |
|
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
diff
changeset
|
2555 // 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
|
2556 // 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
|
2557 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
|
2558 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
|
2559 // 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
|
2560 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
|
2561 break; |
| 0 | 2562 } |
| 2563 } | |
| 2564 // Remember to strip ACC_SUPER bit | |
| 2565 return (access & (~JVM_ACC_SUPER)) & JVM_ACC_WRITTEN_FLAGS; | |
| 2566 } | |
| 2567 | |
|
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2568 jint InstanceKlass::jvmti_class_status() const { |
| 0 | 2569 jint result = 0; |
| 2570 | |
| 2571 if (is_linked()) { | |
| 2572 result |= JVMTI_CLASS_STATUS_VERIFIED | JVMTI_CLASS_STATUS_PREPARED; | |
| 2573 } | |
| 2574 | |
| 2575 if (is_initialized()) { | |
| 2576 assert(is_linked(), "Class status is not consistent"); | |
| 2577 result |= JVMTI_CLASS_STATUS_INITIALIZED; | |
| 2578 } | |
| 2579 if (is_in_error_state()) { | |
| 2580 result |= JVMTI_CLASS_STATUS_ERROR; | |
| 2581 } | |
| 2582 return result; | |
| 2583 } | |
| 2584 | |
|
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2585 Method* InstanceKlass::method_at_itable(Klass* holder, int index, TRAPS) { |
| 0 | 2586 itableOffsetEntry* ioe = (itableOffsetEntry*)start_of_itable(); |
| 2587 int method_table_offset_in_words = ioe->offset()/wordSize; | |
| 2588 int nof_interfaces = (method_table_offset_in_words - itable_offset_in_words()) | |
| 2589 / itableOffsetEntry::size(); | |
| 2590 | |
| 2591 for (int cnt = 0 ; ; cnt ++, ioe ++) { | |
| 605 | 2592 // If the interface isn't implemented by the receiver class, |
| 0 | 2593 // the VM should throw IncompatibleClassChangeError. |
| 2594 if (cnt >= nof_interfaces) { | |
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2595 THROW_NULL(vmSymbols::java_lang_IncompatibleClassChangeError()); |
| 0 | 2596 } |
| 2597 | |
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2598 Klass* ik = ioe->interface_klass(); |
| 0 | 2599 if (ik == holder) break; |
| 2600 } | |
| 2601 | |
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2602 itableMethodEntry* ime = ioe->first_method_entry(this); |
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2603 Method* m = ime[index].method(); |
| 0 | 2604 if (m == NULL) { |
|
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2605 THROW_NULL(vmSymbols::java_lang_AbstractMethodError()); |
| 0 | 2606 } |
| 2607 return m; | |
| 2608 } | |
| 2609 | |
| 2610 // On-stack replacement stuff | |
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2611 void InstanceKlass::add_osr_nmethod(nmethod* n) { |
| 0 | 2612 // only one compilation can be active |
| 2613 NEEDS_CLEANUP | |
| 2614 // This is a short non-blocking critical region, so the no safepoint check is ok. | |
| 2615 OsrList_lock->lock_without_safepoint_check(); | |
| 2616 assert(n->is_osr_method(), "wrong kind of nmethod"); | |
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2617 n->set_osr_link(osr_nmethods_head()); |
| 0 | 2618 set_osr_nmethods_head(n); |
| 1783 | 2619 // Raise the highest osr level if necessary |
| 2620 if (TieredCompilation) { | |
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2621 Method* m = n->method(); |
| 1783 | 2622 m->set_highest_osr_comp_level(MAX2(m->highest_osr_comp_level(), n->comp_level())); |
| 2623 } | |
| 0 | 2624 // Remember to unlock again |
| 2625 OsrList_lock->unlock(); | |
| 1783 | 2626 |
| 2627 // Get rid of the osr methods for the same bci that have lower levels. | |
| 2628 if (TieredCompilation) { | |
| 2629 for (int l = CompLevel_limited_profile; l < n->comp_level(); l++) { | |
| 2630 nmethod *inv = lookup_osr_nmethod(n->method(), n->osr_entry_bci(), l, true); | |
| 2631 if (inv != NULL && inv->is_in_use()) { | |
| 2632 inv->make_not_entrant(); | |
| 2633 } | |
| 2634 } | |
| 2635 } | |
| 0 | 2636 } |
| 2637 | |
| 2638 | |
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2639 void InstanceKlass::remove_osr_nmethod(nmethod* n) { |
| 0 | 2640 // This is a short non-blocking critical region, so the no safepoint check is ok. |
| 2641 OsrList_lock->lock_without_safepoint_check(); | |
| 2642 assert(n->is_osr_method(), "wrong kind of nmethod"); | |
| 2643 nmethod* last = NULL; | |
| 2644 nmethod* cur = osr_nmethods_head(); | |
| 1783 | 2645 int max_level = CompLevel_none; // Find the max comp level excluding n |
|
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2646 Method* m = n->method(); |
| 0 | 2647 // Search for match |
| 2648 while(cur != NULL && cur != n) { | |
| 1783 | 2649 if (TieredCompilation) { |
| 2650 // Find max level before n | |
| 2651 max_level = MAX2(max_level, cur->comp_level()); | |
| 2652 } | |
| 0 | 2653 last = cur; |
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2654 cur = cur->osr_link(); |
| 0 | 2655 } |
| 1783 | 2656 nmethod* next = NULL; |
| 0 | 2657 if (cur == n) { |
| 1783 | 2658 next = cur->osr_link(); |
| 0 | 2659 if (last == NULL) { |
| 2660 // Remove first element | |
| 1783 | 2661 set_osr_nmethods_head(next); |
| 0 | 2662 } else { |
| 1783 | 2663 last->set_osr_link(next); |
| 0 | 2664 } |
| 2665 } | |
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2666 n->set_osr_link(NULL); |
| 1783 | 2667 if (TieredCompilation) { |
| 2668 cur = next; | |
| 2669 while (cur != NULL) { | |
| 2670 // Find max level after n | |
| 2671 max_level = MAX2(max_level, cur->comp_level()); | |
| 2672 cur = cur->osr_link(); | |
| 2673 } | |
| 2674 m->set_highest_osr_comp_level(max_level); | |
| 2675 } | |
| 0 | 2676 // Remember to unlock again |
| 2677 OsrList_lock->unlock(); | |
| 2678 } | |
| 2679 | |
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2680 nmethod* InstanceKlass::lookup_osr_nmethod(Method* const m, int bci, int comp_level, bool match_level) const { |
| 0 | 2681 // This is a short non-blocking critical region, so the no safepoint check is ok. |
| 2682 OsrList_lock->lock_without_safepoint_check(); | |
| 2683 nmethod* osr = osr_nmethods_head(); | |
| 1783 | 2684 nmethod* best = NULL; |
| 0 | 2685 while (osr != NULL) { |
| 2686 assert(osr->is_osr_method(), "wrong kind of nmethod found in chain"); | |
| 1783 | 2687 // There can be a time when a c1 osr method exists but we are waiting |
| 2688 // for a c2 version. When c2 completes its osr nmethod we will trash | |
| 2689 // the c1 version and only be able to find the c2 version. However | |
| 2690 // while we overflow in the c1 code at back branches we don't want to | |
| 2691 // try and switch to the same code as we are already running | |
| 2692 | |
| 0 | 2693 if (osr->method() == m && |
| 2694 (bci == InvocationEntryBci || osr->osr_entry_bci() == bci)) { | |
| 1783 | 2695 if (match_level) { |
| 2696 if (osr->comp_level() == comp_level) { | |
| 2697 // Found a match - return it. | |
| 2698 OsrList_lock->unlock(); | |
| 2699 return osr; | |
| 2700 } | |
| 2701 } else { | |
| 2702 if (best == NULL || (osr->comp_level() > best->comp_level())) { | |
| 2703 if (osr->comp_level() == CompLevel_highest_tier) { | |
| 2704 // Found the best possible - return it. | |
| 2705 OsrList_lock->unlock(); | |
| 2706 return osr; | |
| 2707 } | |
| 2708 best = osr; | |
| 2709 } | |
| 2710 } | |
| 0 | 2711 } |
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2712 osr = osr->osr_link(); |
| 0 | 2713 } |
| 2714 OsrList_lock->unlock(); | |
| 1783 | 2715 if (best != NULL && best->comp_level() >= comp_level && match_level == false) { |
| 2716 return best; | |
| 2717 } | |
| 0 | 2718 return NULL; |
| 2719 } | |
| 2720 | |
| 2721 // ----------------------------------------------------------------------------------------------------- | |
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2722 // Printing |
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2723 |
| 0 | 2724 #ifndef PRODUCT |
| 2725 | |
|
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2726 #define BULLET " - " |
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2727 |
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2728 static const char* state_names[] = { |
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2729 "allocated", "loaded", "linked", "being_initialized", "fully_initialized", "initialization_error" |
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2730 }; |
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2731 |
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2732 void InstanceKlass::print_on(outputStream* st) const { |
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2733 assert(is_klass(), "must be klass"); |
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2734 Klass::print_on(st); |
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2735 |
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2736 st->print(BULLET"instance size: %d", size_helper()); st->cr(); |
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2737 st->print(BULLET"klass size: %d", size()); st->cr(); |
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2738 st->print(BULLET"access: "); access_flags().print_on(st); st->cr(); |
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2739 st->print(BULLET"state: "); st->print_cr(state_names[_init_state]); |
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2740 st->print(BULLET"name: "); name()->print_value_on(st); st->cr(); |
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2741 st->print(BULLET"super: "); super()->print_value_on_maybe_null(st); st->cr(); |
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2742 st->print(BULLET"sub: "); |
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2743 Klass* sub = subklass(); |
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2744 int n; |
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2745 for (n = 0; sub != NULL; n++, sub = sub->next_sibling()) { |
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2746 if (n < MaxSubklassPrintSize) { |
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2747 sub->print_value_on(st); |
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2748 st->print(" "); |
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2749 } |
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2750 } |
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2751 if (n >= MaxSubklassPrintSize) st->print("(%d more klasses...)", n - MaxSubklassPrintSize); |
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2752 st->cr(); |
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2753 |
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2754 if (is_interface()) { |
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2755 st->print_cr(BULLET"nof implementors: %d", nof_implementors()); |
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2756 if (nof_implementors() == 1) { |
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2757 st->print_cr(BULLET"implementor: "); |
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2758 st->print(" "); |
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2759 implementor()->print_value_on(st); |
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2760 st->cr(); |
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2761 } |
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2762 } |
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2763 |
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2764 st->print(BULLET"arrays: "); array_klasses()->print_value_on_maybe_null(st); st->cr(); |
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2765 st->print(BULLET"methods: "); methods()->print_value_on(st); st->cr(); |
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2766 if (Verbose) { |
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2767 Array<Method*>* method_array = methods(); |
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2768 for(int i = 0; i < method_array->length(); i++) { |
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2769 st->print("%d : ", i); method_array->at(i)->print_value(); st->cr(); |
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2770 } |
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2771 } |
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2772 st->print(BULLET"method ordering: "); method_ordering()->print_value_on(st); st->cr(); |
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2773 st->print(BULLET"local interfaces: "); local_interfaces()->print_value_on(st); st->cr(); |
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2774 st->print(BULLET"trans. interfaces: "); transitive_interfaces()->print_value_on(st); st->cr(); |
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2775 st->print(BULLET"constants: "); constants()->print_value_on(st); st->cr(); |
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2776 if (class_loader_data() != NULL) { |
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2777 st->print(BULLET"class loader data: "); |
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2778 class_loader_data()->print_value_on(st); |
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2779 st->cr(); |
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2780 } |
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2781 st->print(BULLET"protection domain: "); ((InstanceKlass*)this)->protection_domain()->print_value_on(st); st->cr(); |
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2782 st->print(BULLET"host class: "); host_klass()->print_value_on_maybe_null(st); st->cr(); |
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2783 st->print(BULLET"signers: "); signers()->print_value_on(st); st->cr(); |
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2784 st->print(BULLET"init_lock: "); ((oop)init_lock())->print_value_on(st); st->cr(); |
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2785 if (source_file_name() != NULL) { |
|
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2786 st->print(BULLET"source file: "); |
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2787 source_file_name()->print_value_on(st); |
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2788 st->cr(); |
|
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|
2789 } |
|
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|
2790 if (source_debug_extension() != NULL) { |
|
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|
2791 st->print(BULLET"source debug extension: "); |
|
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|
2792 st->print("%s", source_debug_extension()); |
|
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|
2793 st->cr(); |
|
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|
2794 } |
| 8031 | 2795 st->print(BULLET"class annotations: "); class_annotations()->print_value_on(st); st->cr(); |
| 2796 st->print(BULLET"class type annotations: "); class_type_annotations()->print_value_on(st); st->cr(); | |
| 2797 st->print(BULLET"field annotations: "); fields_annotations()->print_value_on(st); st->cr(); | |
| 2798 st->print(BULLET"field type annotations: "); fields_type_annotations()->print_value_on(st); st->cr(); | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
2799 { |
|
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|
2800 ResourceMark rm; |
|
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|
2801 // PreviousVersionInfo objects returned via PreviousVersionWalker |
|
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|
2802 // contain a GrowableArray of handles. We have to clean up the |
|
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|
2803 // GrowableArray _after_ the PreviousVersionWalker destructor |
|
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|
2804 // has destroyed the handles. |
|
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|
2805 { |
|
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|
2806 bool have_pv = false; |
|
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|
2807 PreviousVersionWalker pvw((InstanceKlass*)this); |
|
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|
2808 for (PreviousVersionInfo * pv_info = pvw.next_previous_version(); |
|
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|
2809 pv_info != NULL; pv_info = pvw.next_previous_version()) { |
|
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|
2810 if (!have_pv) |
|
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|
2811 st->print(BULLET"previous version: "); |
|
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|
2812 have_pv = true; |
|
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|
2813 pv_info->prev_constant_pool_handle()()->print_value_on(st); |
|
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|
2814 } |
|
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|
2815 if (have_pv) st->cr(); |
|
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|
2816 } // pvw is cleaned up |
|
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|
2817 } // rm is cleaned up |
|
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|
2818 |
|
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|
2819 if (generic_signature() != NULL) { |
|
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|
2820 st->print(BULLET"generic signature: "); |
|
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|
2821 generic_signature()->print_value_on(st); |
|
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|
2822 st->cr(); |
|
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|
2823 } |
|
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|
2824 st->print(BULLET"inner classes: "); inner_classes()->print_value_on(st); st->cr(); |
|
da91efe96a93
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|
2825 st->print(BULLET"java mirror: "); java_mirror()->print_value_on(st); st->cr(); |
|
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|
2826 st->print(BULLET"vtable length %d (start addr: " INTPTR_FORMAT ")", vtable_length(), start_of_vtable()); st->cr(); |
|
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diff
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|
2827 st->print(BULLET"itable length %d (start addr: " INTPTR_FORMAT ")", itable_length(), start_of_itable()); st->cr(); |
|
da91efe96a93
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|
2828 st->print_cr(BULLET"---- static fields (%d words):", static_field_size()); |
|
da91efe96a93
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|
2829 FieldPrinter print_static_field(st); |
|
da91efe96a93
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diff
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|
2830 ((InstanceKlass*)this)->do_local_static_fields(&print_static_field); |
|
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|
2831 st->print_cr(BULLET"---- non-static fields (%d words):", nonstatic_field_size()); |
|
da91efe96a93
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|
2832 FieldPrinter print_nonstatic_field(st); |
|
da91efe96a93
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|
2833 ((InstanceKlass*)this)->do_nonstatic_fields(&print_nonstatic_field); |
|
da91efe96a93
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|
2834 |
|
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|
2835 st->print(BULLET"non-static oop maps: "); |
|
da91efe96a93
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diff
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|
2836 OopMapBlock* map = start_of_nonstatic_oop_maps(); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
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|
2837 OopMapBlock* end_map = map + nonstatic_oop_map_count(); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
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|
2838 while (map < end_map) { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
2839 st->print("%d-%d ", map->offset(), map->offset() + heapOopSize*(map->count() - 1)); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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changeset
|
2840 map++; |
|
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diff
changeset
|
2841 } |
|
da91efe96a93
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diff
changeset
|
2842 st->cr(); |
|
da91efe96a93
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diff
changeset
|
2843 } |
|
da91efe96a93
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diff
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|
2844 |
|
da91efe96a93
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diff
changeset
|
2845 #endif //PRODUCT |
|
da91efe96a93
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diff
changeset
|
2846 |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
2847 void InstanceKlass::print_value_on(outputStream* st) const { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
2848 assert(is_klass(), "must be klass"); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
2849 name()->print_value_on(st); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
2850 } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
2851 |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
2852 #ifndef PRODUCT |
|
da91efe96a93
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diff
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|
2853 |
| 0 | 2854 void FieldPrinter::do_field(fieldDescriptor* fd) { |
|
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2855 _st->print(BULLET); |
|
2376
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2357
diff
changeset
|
2856 if (_obj == NULL) { |
| 0 | 2857 fd->print_on(_st); |
| 2858 _st->cr(); | |
| 2859 } else { | |
| 2860 fd->print_on_for(_st, _obj); | |
| 2861 _st->cr(); | |
| 2862 } | |
| 2863 } | |
| 2864 | |
| 2865 | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2866 void InstanceKlass::oop_print_on(oop obj, outputStream* st) { |
| 0 | 2867 Klass::oop_print_on(obj, st); |
| 2868 | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
2869 if (this == SystemDictionary::String_klass()) { |
| 0 | 2870 typeArrayOop value = java_lang_String::value(obj); |
| 2871 juint offset = java_lang_String::offset(obj); | |
| 2872 juint length = java_lang_String::length(obj); | |
| 2873 if (value != NULL && | |
| 2874 value->is_typeArray() && | |
| 2875 offset <= (juint) value->length() && | |
| 2876 offset + length <= (juint) value->length()) { | |
|
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2877 st->print(BULLET"string: "); |
| 0 | 2878 Handle h_obj(obj); |
| 2879 java_lang_String::print(h_obj, st); | |
| 2880 st->cr(); | |
| 2881 if (!WizardMode) return; // that is enough | |
| 2882 } | |
| 2883 } | |
| 2884 | |
|
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2885 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
|
2886 FieldPrinter print_field(st, obj); |
|
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2357
diff
changeset
|
2887 do_nonstatic_fields(&print_field); |
| 0 | 2888 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
2889 if (this == SystemDictionary::Class_klass()) { |
|
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2890 st->print(BULLET"signature: "); |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2891 java_lang_Class::print_signature(obj, st); |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2892 st->cr(); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
2893 Klass* mirrored_klass = java_lang_Class::as_Klass(obj); |
|
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2894 st->print(BULLET"fake entry for mirror: "); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
2895 mirrored_klass->print_value_on_maybe_null(st); |
| 0 | 2896 st->cr(); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
2897 Klass* array_klass = java_lang_Class::array_klass(obj); |
|
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2898 st->print(BULLET"fake entry for array: "); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
2899 array_klass->print_value_on_maybe_null(st); |
| 0 | 2900 st->cr(); |
|
2376
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2357
diff
changeset
|
2901 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
|
2902 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
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6266
diff
changeset
|
2903 Klass* real_klass = java_lang_Class::as_Klass(obj); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
2904 if (real_klass != NULL && real_klass->oop_is_instance()) { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
2905 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
|
2906 } |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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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(BULLET"signature: "); |
|
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); |
|
1039
987e948ebbc8
6815692: method handle code needs some cleanup (post-6655638)
jrose
parents:
997
diff
changeset
|
2910 st->cr(); |
| 0 | 2911 } |
| 2912 } | |
| 2913 | |
|
6948
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
2914 #endif |
|
1155
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1144
diff
changeset
|
2915 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
2916 void InstanceKlass::oop_print_value_on(oop obj, outputStream* st) { |
| 0 | 2917 st->print("a "); |
| 2918 name()->print_value_on(st); | |
| 2919 obj->print_address_on(st); | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
2920 if (this == SystemDictionary::String_klass() |
|
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2921 && java_lang_String::value(obj) != NULL) { |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2922 ResourceMark rm; |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2923 int len = java_lang_String::length(obj); |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2924 int plen = (len < 24 ? len : 12); |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2925 char* str = java_lang_String::as_utf8_string(obj, 0, plen); |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2926 st->print(" = \"%s\"", str); |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2927 if (len > plen) |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2928 st->print("...[%d]", len); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
2929 } else if (this == SystemDictionary::Class_klass()) { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
2930 Klass* k = java_lang_Class::as_Klass(obj); |
|
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2931 st->print(" = "); |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2932 if (k != NULL) { |
|
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|
2933 k->print_value_on(st); |
|
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|
2934 } else { |
|
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|
2935 const char* tname = type2name(java_lang_Class::primitive_type(obj)); |
|
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|
2936 st->print("%s", tname ? tname : "type?"); |
|
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|
2937 } |
|
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2938 } else if (this == SystemDictionary::MethodType_klass()) { |
|
1039
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|
2939 st->print(" = "); |
|
2357
8033953d67ff
7012648: move JSR 292 to package java.lang.invoke and adjust names
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diff
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|
2940 java_lang_invoke_MethodType::print_signature(obj, st); |
|
665
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|
2941 } else if (java_lang_boxing_object::is_instance(obj)) { |
|
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|
2942 st->print(" = "); |
|
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|
2943 java_lang_boxing_object::print(obj, st); |
|
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2944 } else if (this == SystemDictionary::LambdaForm_klass()) { |
|
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2945 oop vmentry = java_lang_invoke_LambdaForm::vmentry(obj); |
|
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2946 if (vmentry != NULL) { |
|
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|
2947 st->print(" => "); |
|
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|
2948 vmentry->print_value_on(st); |
|
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|
2949 } |
|
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|
2950 } else if (this == SystemDictionary::MemberName_klass()) { |
|
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2951 Metadata* vmtarget = java_lang_invoke_MemberName::vmtarget(obj); |
|
6266
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|
2952 if (vmtarget != NULL) { |
|
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|
2953 st->print(" = "); |
|
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|
2954 vmtarget->print_value_on(st); |
|
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|
2955 } else { |
|
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|
2956 java_lang_invoke_MemberName::clazz(obj)->print_value_on(st); |
|
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|
2957 st->print("."); |
|
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|
2958 java_lang_invoke_MemberName::name(obj)->print_value_on(st); |
|
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|
2959 } |
|
665
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|
2960 } |
| 0 | 2961 } |
| 2962 | |
|
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2963 const char* InstanceKlass::internal_name() const { |
| 0 | 2964 return external_name(); |
| 2965 } | |
| 2966 | |
| 7956 | 2967 #if INCLUDE_SERVICES |
| 2968 // Size Statistics | |
| 2969 void InstanceKlass::collect_statistics(KlassSizeStats *sz) const { | |
| 2970 Klass::collect_statistics(sz); | |
| 2971 | |
| 2972 sz->_inst_size = HeapWordSize * size_helper(); | |
| 2973 sz->_vtab_bytes = HeapWordSize * align_object_offset(vtable_length()); | |
| 2974 sz->_itab_bytes = HeapWordSize * align_object_offset(itable_length()); | |
| 2975 sz->_nonstatic_oopmap_bytes = HeapWordSize * | |
| 2976 ((is_interface() || is_anonymous()) ? | |
| 2977 align_object_offset(nonstatic_oop_map_size()) : | |
| 2978 nonstatic_oop_map_size()); | |
| 2979 | |
| 2980 int n = 0; | |
| 2981 n += (sz->_methods_array_bytes = sz->count_array(methods())); | |
| 2982 n += (sz->_method_ordering_bytes = sz->count_array(method_ordering())); | |
| 2983 n += (sz->_local_interfaces_bytes = sz->count_array(local_interfaces())); | |
| 2984 n += (sz->_transitive_interfaces_bytes = sz->count_array(transitive_interfaces())); | |
| 2985 n += (sz->_signers_bytes = sz->count_array(signers())); | |
| 2986 n += (sz->_fields_bytes = sz->count_array(fields())); | |
| 2987 n += (sz->_inner_classes_bytes = sz->count_array(inner_classes())); | |
| 2988 sz->_ro_bytes += n; | |
| 2989 | |
| 2990 const ConstantPool* cp = constants(); | |
| 2991 if (cp) { | |
| 2992 cp->collect_statistics(sz); | |
| 2993 } | |
| 2994 | |
| 2995 const Annotations* anno = annotations(); | |
| 2996 if (anno) { | |
| 2997 anno->collect_statistics(sz); | |
| 2998 } | |
| 2999 | |
| 3000 const Array<Method*>* methods_array = methods(); | |
| 3001 if (methods()) { | |
| 3002 for (int i = 0; i < methods_array->length(); i++) { | |
| 3003 Method* method = methods_array->at(i); | |
| 3004 if (method) { | |
| 3005 sz->_method_count ++; | |
| 3006 method->collect_statistics(sz); | |
| 3007 } | |
| 3008 } | |
| 3009 } | |
| 3010 } | |
| 3011 #endif // INCLUDE_SERVICES | |
| 3012 | |
| 0 | 3013 // Verification |
| 3014 | |
| 3015 class VerifyFieldClosure: public OopClosure { | |
|
113
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|
3016 protected: |
|
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|
3017 template <class T> void do_oop_work(T* p) { |
|
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|
3018 oop obj = oopDesc::load_decode_heap_oop(p); |
|
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|
3019 if (!obj->is_oop_or_null()) { |
|
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|
3020 tty->print_cr("Failed: " PTR_FORMAT " -> " PTR_FORMAT, p, (address)obj); |
| 0 | 3021 Universe::print(); |
| 3022 guarantee(false, "boom"); | |
| 3023 } | |
| 3024 } | |
|
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|
3025 public: |
|
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|
3026 virtual void do_oop(oop* p) { VerifyFieldClosure::do_oop_work(p); } |
|
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|
3027 virtual void do_oop(narrowOop* p) { VerifyFieldClosure::do_oop_work(p); } |
| 0 | 3028 }; |
| 3029 | |
|
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|
3030 void InstanceKlass::verify_on(outputStream* st) { |
|
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|
3031 Klass::verify_on(st); |
|
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|
3032 Thread *thread = Thread::current(); |
|
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|
3033 |
|
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|
3034 #ifndef PRODUCT |
|
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|
3035 // Avoid redundant verifies |
|
da91efe96a93
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|
3036 if (_verify_count == Universe::verify_count()) return; |
|
da91efe96a93
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|
3037 _verify_count = Universe::verify_count(); |
|
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|
3038 #endif |
|
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|
3039 // Verify that klass is present in SystemDictionary |
|
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|
3040 if (is_loaded() && !is_anonymous()) { |
|
da91efe96a93
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|
3041 Symbol* h_name = name(); |
|
da91efe96a93
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|
3042 SystemDictionary::verify_obj_klass_present(h_name, class_loader_data()); |
|
da91efe96a93
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|
3043 } |
|
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|
3044 |
|
da91efe96a93
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|
3045 // Verify static fields |
|
da91efe96a93
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|
3046 VerifyFieldClosure blk; |
|
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|
3047 |
|
da91efe96a93
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|
3048 // Verify vtables |
|
da91efe96a93
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|
3049 if (is_linked()) { |
|
da91efe96a93
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|
3050 ResourceMark rm(thread); |
|
da91efe96a93
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|
3051 // $$$ This used to be done only for m/s collections. Doing it |
|
da91efe96a93
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|
3052 // always seemed a valid generalization. (DLD -- 6/00) |
|
da91efe96a93
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|
3053 vtable()->verify(st); |
|
da91efe96a93
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|
3054 } |
|
da91efe96a93
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|
3055 |
|
da91efe96a93
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|
3056 // Verify first subklass |
|
da91efe96a93
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diff
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|
3057 if (subklass_oop() != NULL) { |
|
da91efe96a93
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|
3058 guarantee(subklass_oop()->is_metadata(), "should be in metaspace"); |
|
da91efe96a93
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|
3059 guarantee(subklass_oop()->is_klass(), "should be klass"); |
|
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|
3060 } |
|
da91efe96a93
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|
3061 |
|
da91efe96a93
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|
3062 // Verify siblings |
|
da91efe96a93
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|
3063 Klass* super = this->super(); |
|
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|
3064 Klass* sib = next_sibling(); |
|
da91efe96a93
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|
3065 if (sib != NULL) { |
|
da91efe96a93
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|
3066 if (sib == this) { |
|
da91efe96a93
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|
3067 fatal(err_msg("subclass points to itself " PTR_FORMAT, sib)); |
|
da91efe96a93
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|
3068 } |
|
da91efe96a93
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|
3069 |
|
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|
3070 guarantee(sib->is_metadata(), "should be in metaspace"); |
|
da91efe96a93
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|
3071 guarantee(sib->is_klass(), "should be klass"); |
|
da91efe96a93
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|
3072 guarantee(sib->super() == super, "siblings should have same superklass"); |
|
da91efe96a93
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|
3073 } |
|
da91efe96a93
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|
3074 |
|
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|
3075 // Verify implementor fields |
|
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|
3076 Klass* im = implementor(); |
|
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|
3077 if (im != NULL) { |
|
da91efe96a93
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|
3078 guarantee(is_interface(), "only interfaces should have implementor set"); |
|
da91efe96a93
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|
3079 guarantee(im->is_klass(), "should be klass"); |
| 6983 | 3080 guarantee(!im->is_interface() || im == this, |
|
6725
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|
3081 "implementors cannot be interfaces"); |
|
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|
3082 } |
|
da91efe96a93
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|
3083 |
|
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|
3084 // Verify local interfaces |
|
da91efe96a93
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|
3085 if (local_interfaces()) { |
|
da91efe96a93
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|
3086 Array<Klass*>* local_interfaces = this->local_interfaces(); |
|
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|
3087 for (int j = 0; j < local_interfaces->length(); j++) { |
|
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|
3088 Klass* e = local_interfaces->at(j); |
| 6983 | 3089 guarantee(e->is_klass() && e->is_interface(), "invalid local interface"); |
|
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|
3090 } |
|
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|
3091 } |
|
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|
3092 |
|
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|
3093 // Verify transitive interfaces |
|
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|
3094 if (transitive_interfaces() != NULL) { |
|
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|
3095 Array<Klass*>* transitive_interfaces = this->transitive_interfaces(); |
|
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|
3096 for (int j = 0; j < transitive_interfaces->length(); j++) { |
|
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|
3097 Klass* e = transitive_interfaces->at(j); |
| 6983 | 3098 guarantee(e->is_klass() && e->is_interface(), "invalid transitive interface"); |
|
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3099 } |
|
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3100 } |
|
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3101 |
|
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3102 // Verify methods |
|
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3103 if (methods() != NULL) { |
|
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3104 Array<Method*>* methods = this->methods(); |
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3105 for (int j = 0; j < methods->length(); j++) { |
|
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3106 guarantee(methods->at(j)->is_metadata(), "should be in metaspace"); |
|
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3107 guarantee(methods->at(j)->is_method(), "non-method in methods array"); |
|
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3108 } |
|
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3109 for (int j = 0; j < methods->length() - 1; j++) { |
|
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3110 Method* m1 = methods->at(j); |
|
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3111 Method* m2 = methods->at(j + 1); |
|
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3112 guarantee(m1->name()->fast_compare(m2->name()) <= 0, "methods not sorted correctly"); |
|
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3113 } |
|
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3114 } |
|
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3115 |
|
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3116 // Verify method ordering |
|
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3117 if (method_ordering() != NULL) { |
|
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3118 Array<int>* method_ordering = this->method_ordering(); |
|
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3119 int length = method_ordering->length(); |
|
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3120 if (JvmtiExport::can_maintain_original_method_order() || |
|
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3121 (UseSharedSpaces && length != 0)) { |
|
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3122 guarantee(length == methods()->length(), "invalid method ordering length"); |
|
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3123 jlong sum = 0; |
|
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3124 for (int j = 0; j < length; j++) { |
|
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3125 int original_index = method_ordering->at(j); |
|
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3126 guarantee(original_index >= 0, "invalid method ordering index"); |
|
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3127 guarantee(original_index < length, "invalid method ordering index"); |
|
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3128 sum += original_index; |
|
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3129 } |
|
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3130 // Verify sum of indices 0,1,...,length-1 |
|
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3131 guarantee(sum == ((jlong)length*(length-1))/2, "invalid method ordering sum"); |
|
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3132 } else { |
|
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3133 guarantee(length == 0, "invalid method ordering length"); |
|
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3134 } |
|
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|
3135 } |
|
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|
3136 |
|
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3137 // Verify JNI static field identifiers |
|
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3138 if (jni_ids() != NULL) { |
|
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3139 jni_ids()->verify(this); |
|
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3140 } |
|
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|
3141 |
|
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|
3142 // Verify other fields |
|
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|
3143 if (array_klasses() != NULL) { |
|
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|
3144 guarantee(array_klasses()->is_metadata(), "should be in metaspace"); |
|
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3145 guarantee(array_klasses()->is_klass(), "should be klass"); |
|
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3146 } |
|
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|
3147 if (constants() != NULL) { |
|
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|
3148 guarantee(constants()->is_metadata(), "should be in metaspace"); |
|
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3149 guarantee(constants()->is_constantPool(), "should be constant pool"); |
|
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|
3150 } |
|
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|
3151 if (protection_domain() != NULL) { |
|
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|
3152 guarantee(protection_domain()->is_oop(), "should be oop"); |
|
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|
3153 } |
|
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|
3154 if (host_klass() != NULL) { |
|
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|
3155 guarantee(host_klass()->is_metadata(), "should be in metaspace"); |
|
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|
3156 guarantee(host_klass()->is_klass(), "should be klass"); |
|
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|
3157 } |
|
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|
3158 if (signers() != NULL) { |
|
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|
3159 guarantee(signers()->is_objArray(), "should be obj array"); |
|
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|
3160 } |
|
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|
3161 } |
|
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|
3162 |
|
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|
3163 void InstanceKlass::oop_verify_on(oop obj, outputStream* st) { |
| 0 | 3164 Klass::oop_verify_on(obj, st); |
| 3165 VerifyFieldClosure blk; | |
|
6725
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|
3166 obj->oop_iterate_no_header(&blk); |
| 0 | 3167 } |
| 3168 | |
|
6725
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|
3169 |
|
113
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|
3170 // JNIid class for jfieldIDs only |
|
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|
3171 // Note to reviewers: |
|
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|
3172 // These JNI functions are just moved over to column 1 and not changed |
|
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|
3173 // in the compressed oops workspace. |
|
6725
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3174 JNIid::JNIid(Klass* holder, int offset, JNIid* next) { |
|
113
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|
3175 _holder = holder; |
|
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|
3176 _offset = offset; |
|
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|
3177 _next = next; |
|
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|
3178 debug_only(_is_static_field_id = false;) |
|
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|
3179 } |
| 0 | 3180 |
| 3181 | |
|
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|
3182 JNIid* JNIid::find(int offset) { |
|
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|
3183 JNIid* current = this; |
|
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|
3184 while (current != NULL) { |
|
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|
3185 if (current->offset() == offset) return current; |
|
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|
3186 current = current->next(); |
|
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|
3187 } |
|
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|
3188 return NULL; |
|
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|
3189 } |
| 0 | 3190 |
| 3191 void JNIid::deallocate(JNIid* current) { | |
|
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|
3192 while (current != NULL) { |
|
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|
3193 JNIid* next = current->next(); |
|
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|
3194 delete current; |
|
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|
3195 current = next; |
|
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|
3196 } |
|
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|
3197 } |
| 0 | 3198 |
| 3199 | |
|
6725
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|
3200 void JNIid::verify(Klass* holder) { |
|
6735
aed758eda82a
7195833: NPG: Rename instanceClassLoaderKlass, instanceRefKlass and instanceMirrorKlass
coleenp
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6733
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|
3201 int first_field_offset = InstanceMirrorKlass::offset_of_static_fields(); |
|
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|
3202 int end_field_offset; |
|
6725
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3203 end_field_offset = first_field_offset + (InstanceKlass::cast(holder)->static_field_size() * wordSize); |
| 0 | 3204 |
|
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|
3205 JNIid* current = this; |
|
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|
3206 while (current != NULL) { |
|
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|
3207 guarantee(current->holder() == holder, "Invalid klass in JNIid"); |
|
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|
3208 #ifdef ASSERT |
|
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|
3209 int o = current->offset(); |
|
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|
3210 if (current->is_static_field_id()) { |
|
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|
3211 guarantee(o >= first_field_offset && o < end_field_offset, "Invalid static field offset in JNIid"); |
|
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|
3212 } |
|
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|
3213 #endif |
|
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|
3214 current = current->next(); |
|
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|
3215 } |
|
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|
3216 } |
| 0 | 3217 |
| 3218 | |
| 3219 #ifdef ASSERT | |
|
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3220 void InstanceKlass::set_init_state(ClassState state) { |
|
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3221 bool good_state = is_shared() ? (_init_state <= state) |
|
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3222 : (_init_state < state); |
|
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|
3223 assert(good_state || state == allocated, "illegal state transition"); |
|
4739
52b5d32fbfaf
7117052: instanceKlass::_init_state can be u1 type
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|
3224 _init_state = (u1)state; |
|
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|
3225 } |
| 0 | 3226 #endif |
| 3227 | |
| 3228 | |
| 3229 // RedefineClasses() support for previous versions: | |
| 3230 | |
|
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3231 // Purge previous versions |
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3232 static void purge_previous_versions_internal(InstanceKlass* ik, int emcp_method_count) { |
|
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3233 if (ik->previous_versions() != NULL) { |
|
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3234 // This klass has previous versions so see what we can cleanup |
|
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3235 // while it is safe to do so. |
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3236 |
|
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3237 int deleted_count = 0; // leave debugging breadcrumbs |
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3238 int live_count = 0; |
|
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3239 ClassLoaderData* loader_data = ik->class_loader_data() == NULL ? |
|
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3240 ClassLoaderData::the_null_class_loader_data() : |
|
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3241 ik->class_loader_data(); |
|
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3242 |
|
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3243 // RC_TRACE macro has an embedded ResourceMark |
|
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3244 RC_TRACE(0x00000200, ("purge: %s: previous version length=%d", |
|
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3245 ik->external_name(), ik->previous_versions()->length())); |
|
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3246 |
|
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3247 for (int i = ik->previous_versions()->length() - 1; i >= 0; i--) { |
|
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3248 // check the previous versions array |
|
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3249 PreviousVersionNode * pv_node = ik->previous_versions()->at(i); |
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3250 ConstantPool* cp_ref = pv_node->prev_constant_pool(); |
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3251 assert(cp_ref != NULL, "cp ref was unexpectedly cleared"); |
|
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3252 |
|
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3253 ConstantPool* pvcp = cp_ref; |
|
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3254 if (!pvcp->on_stack()) { |
|
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3255 // If the constant pool isn't on stack, none of the methods |
|
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3256 // are executing. Delete all the methods, the constant pool and |
|
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3257 // and this previous version node. |
|
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3258 GrowableArray<Method*>* method_refs = pv_node->prev_EMCP_methods(); |
|
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3259 if (method_refs != NULL) { |
|
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3260 for (int j = method_refs->length() - 1; j >= 0; j--) { |
|
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3261 Method* method = method_refs->at(j); |
|
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3262 assert(method != NULL, "method ref was unexpectedly cleared"); |
|
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3263 method_refs->remove_at(j); |
|
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3264 // method will be freed with associated class. |
|
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3265 } |
|
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|
3266 } |
|
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3267 // Remove the constant pool |
|
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|
3268 delete pv_node; |
|
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3269 // Since we are traversing the array backwards, we don't have to |
|
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3270 // do anything special with the index. |
|
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3271 ik->previous_versions()->remove_at(i); |
|
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3272 deleted_count++; |
|
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3273 continue; |
|
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|
3274 } else { |
|
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|
3275 RC_TRACE(0x00000200, ("purge: previous version @%d is alive", i)); |
|
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3276 assert(pvcp->pool_holder() != NULL, "Constant pool with no holder"); |
|
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3277 guarantee (!loader_data->is_unloading(), "unloaded classes can't be on the stack"); |
|
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3278 live_count++; |
|
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|
3279 } |
|
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|
3280 |
|
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3281 // At least one method is live in this previous version, clean out |
|
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3282 // the others or mark them as obsolete. |
|
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3283 GrowableArray<Method*>* method_refs = pv_node->prev_EMCP_methods(); |
|
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3284 if (method_refs != NULL) { |
|
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|
3285 RC_TRACE(0x00000200, ("purge: previous methods length=%d", |
|
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|
3286 method_refs->length())); |
|
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3287 for (int j = method_refs->length() - 1; j >= 0; j--) { |
|
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3288 Method* method = method_refs->at(j); |
|
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|
3289 assert(method != NULL, "method ref was unexpectedly cleared"); |
|
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3290 |
|
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|
3291 // Remove the emcp method if it's not executing |
|
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3292 // If it's been made obsolete by a redefinition of a non-emcp |
|
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3293 // method, mark it as obsolete but leave it to clean up later. |
|
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3294 if (!method->on_stack()) { |
|
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|
3295 method_refs->remove_at(j); |
|
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|
3296 } else if (emcp_method_count == 0) { |
|
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|
3297 method->set_is_obsolete(); |
|
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|
3298 } else { |
|
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|
3299 // RC_TRACE macro has an embedded ResourceMark |
|
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|
3300 RC_TRACE(0x00000200, |
|
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|
3301 ("purge: %s(%s): prev method @%d in version @%d is alive", |
|
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|
3302 method->name()->as_C_string(), |
|
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|
3303 method->signature()->as_C_string(), j, i)); |
|
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|
3304 } |
|
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|
3305 } |
|
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|
3306 } |
|
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|
3307 } |
|
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|
3308 assert(ik->previous_versions()->length() == live_count, "sanity check"); |
|
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|
3309 RC_TRACE(0x00000200, |
|
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|
3310 ("purge: previous version stats: live=%d, deleted=%d", live_count, |
|
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|
3311 deleted_count)); |
|
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|
3312 } |
|
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|
3313 } |
|
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|
3314 |
|
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|
3315 // External interface for use during class unloading. |
|
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|
3316 void InstanceKlass::purge_previous_versions(InstanceKlass* ik) { |
|
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3317 // Call with >0 emcp methods since they are not currently being redefined. |
|
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|
3318 purge_previous_versions_internal(ik, 1); |
|
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|
3319 } |
|
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|
3320 |
|
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|
3321 |
|
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|
3322 // Potentially add an information node that contains pointers to the |
| 0 | 3323 // interesting parts of the previous version of the_class. |
|
6725
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|
3324 // This is also where we clean out any unused references. |
|
977
74a5db69c1fe
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diff
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|
3325 // Note that while we delete nodes from the _previous_versions |
|
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dcubed
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diff
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|
3326 // array, we never delete the array itself until the klass is |
|
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diff
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|
3327 // unloaded. The has_been_redefined() query depends on that fact. |
|
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|
3328 // |
|
6725
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|
3329 void InstanceKlass::add_previous_version(instanceKlassHandle ikh, |
|
113
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|
3330 BitMap* emcp_methods, int emcp_method_count) { |
| 0 | 3331 assert(Thread::current()->is_VM_thread(), |
|
113
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|
3332 "only VMThread can add previous versions"); |
| 0 | 3333 |
| 3334 if (_previous_versions == NULL) { | |
| 3335 // This is the first previous version so make some space. | |
| 3336 // Start with 2 elements under the assumption that the class | |
| 3337 // won't be redefined much. | |
| 6197 | 3338 _previous_versions = new (ResourceObj::C_HEAP, mtClass) |
| 0 | 3339 GrowableArray<PreviousVersionNode *>(2, true); |
| 3340 } | |
| 3341 | |
|
6725
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|
3342 ConstantPool* cp_ref = ikh->constants(); |
|
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|
3343 |
| 0 | 3344 // RC_TRACE macro has an embedded ResourceMark |
|
6725
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|
3345 RC_TRACE(0x00000400, ("adding previous version ref for %s @%d, EMCP_cnt=%d " |
|
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|
3346 "on_stack=%d", |
|
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|
3347 ikh->external_name(), _previous_versions->length(), emcp_method_count, |
|
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|
3348 cp_ref->on_stack())); |
|
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|
3349 |
|
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|
3350 // If the constant pool for this previous version of the class |
|
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|
3351 // is not marked as being on the stack, then none of the methods |
|
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|
3352 // in this previous version of the class are on the stack so |
|
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|
3353 // we don't need to create a new PreviousVersionNode. However, |
|
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|
3354 // we still need to examine older previous versions below. |
|
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|
3355 Array<Method*>* old_methods = ikh->methods(); |
|
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|
3356 |
|
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|
3357 if (cp_ref->on_stack()) { |
| 0 | 3358 PreviousVersionNode * pv_node = NULL; |
| 3359 if (emcp_method_count == 0) { | |
|
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3360 // non-shared ConstantPool gets a reference |
|
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3361 pv_node = new PreviousVersionNode(cp_ref, !cp_ref->is_shared(), NULL); |
| 0 | 3362 RC_TRACE(0x00000400, |
|
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3363 ("add: all methods are obsolete; flushing any EMCP refs")); |
| 0 | 3364 } else { |
| 3365 int local_count = 0; | |
|
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3366 GrowableArray<Method*>* method_refs = new (ResourceObj::C_HEAP, mtClass) |
|
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3367 GrowableArray<Method*>(emcp_method_count, true); |
| 0 | 3368 for (int i = 0; i < old_methods->length(); i++) { |
| 3369 if (emcp_methods->at(i)) { | |
|
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3370 // this old method is EMCP. Save it only if it's on the stack |
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3371 Method* old_method = old_methods->at(i); |
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3372 if (old_method->on_stack()) { |
|
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3373 method_refs->append(old_method); |
|
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3374 } |
| 0 | 3375 if (++local_count >= emcp_method_count) { |
| 3376 // no more EMCP methods so bail out now | |
| 3377 break; | |
| 3378 } | |
| 3379 } | |
| 3380 } | |
|
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3381 // non-shared ConstantPool gets a reference |
|
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3382 pv_node = new PreviousVersionNode(cp_ref, !cp_ref->is_shared(), method_refs); |
|
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3383 } |
|
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3384 // append new previous version. |
| 0 | 3385 _previous_versions->append(pv_node); |
|
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3386 } |
|
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3387 |
|
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3388 // Since the caller is the VMThread and we are at a safepoint, this |
|
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|
3389 // is a good time to clear out unused references. |
| 0 | 3390 |
| 3391 RC_TRACE(0x00000400, ("add: previous version length=%d", | |
| 3392 _previous_versions->length())); | |
| 3393 | |
|
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3394 // Purge previous versions not executing on the stack |
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3395 purge_previous_versions_internal(this, emcp_method_count); |
| 0 | 3396 |
| 3397 int obsolete_method_count = old_methods->length() - emcp_method_count; | |
| 3398 | |
| 3399 if (emcp_method_count != 0 && obsolete_method_count != 0 && | |
|
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3400 _previous_versions->length() > 0) { |
|
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3401 // We have a mix of obsolete and EMCP methods so we have to |
| 0 | 3402 // clear out any matching EMCP method entries the hard way. |
| 3403 int local_count = 0; | |
| 3404 for (int i = 0; i < old_methods->length(); i++) { | |
| 3405 if (!emcp_methods->at(i)) { | |
| 3406 // only obsolete methods are interesting | |
|
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3407 Method* old_method = old_methods->at(i); |
|
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|
3408 Symbol* m_name = old_method->name(); |
|
3582bf76420e
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|
3409 Symbol* m_signature = old_method->signature(); |
| 0 | 3410 |
|
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3411 // we might not have added the last entry |
|
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|
3412 for (int j = _previous_versions->length() - 1; j >= 0; j--) { |
|
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3413 // check the previous versions array for non executing obsolete methods |
|
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3414 PreviousVersionNode * pv_node = _previous_versions->at(j); |
|
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3415 |
|
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3416 GrowableArray<Method*>* method_refs = pv_node->prev_EMCP_methods(); |
| 0 | 3417 if (method_refs == NULL) { |
| 3418 // We have run into a PreviousVersion generation where | |
| 3419 // all methods were made obsolete during that generation's | |
| 3420 // RedefineClasses() operation. At the time of that | |
| 3421 // operation, all EMCP methods were flushed so we don't | |
| 3422 // have to go back any further. | |
| 3423 // | |
| 3424 // A NULL method_refs is different than an empty method_refs. | |
| 3425 // We cannot infer any optimizations about older generations | |
| 3426 // from an empty method_refs for the current generation. | |
| 3427 break; | |
| 3428 } | |
| 3429 | |
| 3430 for (int k = method_refs->length() - 1; k >= 0; k--) { | |
|
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3431 Method* method = method_refs->at(k); |
|
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3432 |
|
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|
3433 if (!method->is_obsolete() && |
|
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|
3434 method->name() == m_name && |
| 0 | 3435 method->signature() == m_signature) { |
| 3436 // The current RedefineClasses() call has made all EMCP | |
| 3437 // versions of this method obsolete so mark it as obsolete | |
|
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|
3438 // and remove the reference. |
| 0 | 3439 RC_TRACE(0x00000400, |
| 3440 ("add: %s(%s): flush obsolete method @%d in version @%d", | |
| 3441 m_name->as_C_string(), m_signature->as_C_string(), k, j)); | |
| 3442 | |
| 3443 method->set_is_obsolete(); | |
|
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|
3444 // Leave obsolete methods on the previous version list to |
|
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|
3445 // clean up later. |
| 0 | 3446 break; |
| 3447 } | |
| 3448 } | |
| 3449 | |
| 3450 // The previous loop may not find a matching EMCP method, but | |
| 3451 // that doesn't mean that we can optimize and not go any | |
| 3452 // further back in the PreviousVersion generations. The EMCP | |
|
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3453 // method for this generation could have already been deleted, |
| 0 | 3454 // but there still may be an older EMCP method that has not |
|
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|
3455 // been deleted. |
| 0 | 3456 } |
| 3457 | |
| 3458 if (++local_count >= obsolete_method_count) { | |
| 3459 // no more obsolete methods so bail out now | |
| 3460 break; | |
| 3461 } | |
| 3462 } | |
| 3463 } | |
| 3464 } | |
| 3465 } // end add_previous_version() | |
| 3466 | |
| 3467 | |
|
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|
3468 // Determine if InstanceKlass has a previous version. |
|
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|
3469 bool InstanceKlass::has_previous_version() const { |
|
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|
3470 return (_previous_versions != NULL && _previous_versions->length() > 0); |
| 0 | 3471 } // end has_previous_version() |
| 3472 | |
|
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|
3473 |
|
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|
3474 Method* InstanceKlass::method_with_idnum(int idnum) { |
|
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3475 Method* m = NULL; |
| 0 | 3476 if (idnum < methods()->length()) { |
|
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|
3477 m = methods()->at(idnum); |
| 0 | 3478 } |
| 3479 if (m == NULL || m->method_idnum() != idnum) { | |
| 3480 for (int index = 0; index < methods()->length(); ++index) { | |
|
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|
3481 m = methods()->at(index); |
| 0 | 3482 if (m->method_idnum() == idnum) { |
| 3483 return m; | |
| 3484 } | |
| 3485 } | |
| 3486 } | |
| 3487 return m; | |
| 3488 } | |
| 3489 | |
| 3490 | |
| 3491 // Construct a PreviousVersionNode entry for the array hung off | |
|
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|
3492 // the InstanceKlass. |
|
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|
3493 PreviousVersionNode::PreviousVersionNode(ConstantPool* prev_constant_pool, |
|
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|
3494 bool prev_cp_is_weak, GrowableArray<Method*>* prev_EMCP_methods) { |
| 0 | 3495 |
| 3496 _prev_constant_pool = prev_constant_pool; | |
|
47
2c106685d6d0
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diff
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|
3497 _prev_cp_is_weak = prev_cp_is_weak; |
| 0 | 3498 _prev_EMCP_methods = prev_EMCP_methods; |
| 3499 } | |
| 3500 | |
| 3501 | |
| 3502 // Destroy a PreviousVersionNode | |
| 3503 PreviousVersionNode::~PreviousVersionNode() { | |
| 3504 if (_prev_constant_pool != NULL) { | |
|
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|
3505 _prev_constant_pool = NULL; |
| 0 | 3506 } |
| 3507 | |
| 3508 if (_prev_EMCP_methods != NULL) { | |
| 3509 delete _prev_EMCP_methods; | |
| 3510 } | |
| 3511 } | |
| 3512 | |
| 3513 | |
| 3514 // Construct a PreviousVersionInfo entry | |
| 3515 PreviousVersionInfo::PreviousVersionInfo(PreviousVersionNode *pv_node) { | |
| 3516 _prev_constant_pool_handle = constantPoolHandle(); // NULL handle | |
| 3517 _prev_EMCP_method_handles = NULL; | |
| 3518 | |
|
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|
3519 ConstantPool* cp = pv_node->prev_constant_pool(); |
|
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|
3520 assert(cp != NULL, "constant pool ref was unexpectedly cleared"); |
|
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|
3521 if (cp == NULL) { |
| 0 | 3522 return; // robustness |
| 3523 } | |
| 3524 | |
|
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|
3525 // make the ConstantPool* safe to return |
| 0 | 3526 _prev_constant_pool_handle = constantPoolHandle(cp); |
| 3527 | |
|
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|
3528 GrowableArray<Method*>* method_refs = pv_node->prev_EMCP_methods(); |
| 0 | 3529 if (method_refs == NULL) { |
|
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|
3530 // the InstanceKlass did not have any EMCP methods |
| 0 | 3531 return; |
| 3532 } | |
| 3533 | |
| 3534 _prev_EMCP_method_handles = new GrowableArray<methodHandle>(10); | |
| 3535 | |
| 3536 int n_methods = method_refs->length(); | |
| 3537 for (int i = 0; i < n_methods; i++) { | |
|
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|
3538 Method* method = method_refs->at(i); |
|
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|
3539 assert (method != NULL, "method has been cleared"); |
|
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|
3540 if (method == NULL) { |
| 0 | 3541 continue; // robustness |
| 3542 } | |
|
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|
3543 // make the Method* safe to return |
| 0 | 3544 _prev_EMCP_method_handles->append(methodHandle(method)); |
| 3545 } | |
| 3546 } | |
| 3547 | |
| 3548 | |
| 3549 // Destroy a PreviousVersionInfo | |
| 3550 PreviousVersionInfo::~PreviousVersionInfo() { | |
| 3551 // Since _prev_EMCP_method_handles is not C-heap allocated, we | |
| 3552 // don't have to delete it. | |
| 3553 } | |
| 3554 | |
| 3555 | |
| 3556 // Construct a helper for walking the previous versions array | |
|
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|
3557 PreviousVersionWalker::PreviousVersionWalker(InstanceKlass *ik) { |
| 0 | 3558 _previous_versions = ik->previous_versions(); |
| 3559 _current_index = 0; | |
| 3560 // _hm needs no initialization | |
| 3561 _current_p = NULL; | |
| 3562 } | |
| 3563 | |
| 3564 | |
| 3565 // Destroy a PreviousVersionWalker | |
| 3566 PreviousVersionWalker::~PreviousVersionWalker() { | |
| 3567 // Delete the current info just in case the caller didn't walk to | |
| 3568 // the end of the previous versions list. No harm if _current_p is | |
| 3569 // already NULL. | |
| 3570 delete _current_p; | |
| 3571 | |
| 3572 // When _hm is destroyed, all the Handles returned in | |
| 3573 // PreviousVersionInfo objects will be destroyed. | |
| 3574 // Also, after this destructor is finished it will be | |
| 3575 // safe to delete the GrowableArray allocated in the | |
| 3576 // PreviousVersionInfo objects. | |
| 3577 } | |
| 3578 | |
| 3579 | |
| 3580 // Return the interesting information for the next previous version | |
| 3581 // of the klass. Returns NULL if there are no more previous versions. | |
| 3582 PreviousVersionInfo* PreviousVersionWalker::next_previous_version() { | |
| 3583 if (_previous_versions == NULL) { | |
| 3584 // no previous versions so nothing to return | |
| 3585 return NULL; | |
| 3586 } | |
| 3587 | |
| 3588 delete _current_p; // cleanup the previous info for the caller | |
| 3589 _current_p = NULL; // reset to NULL so we don't delete same object twice | |
| 3590 | |
| 3591 int length = _previous_versions->length(); | |
| 3592 | |
| 3593 while (_current_index < length) { | |
| 3594 PreviousVersionNode * pv_node = _previous_versions->at(_current_index++); | |
| 6197 | 3595 PreviousVersionInfo * pv_info = new (ResourceObj::C_HEAP, mtClass) |
| 0 | 3596 PreviousVersionInfo(pv_node); |
| 3597 | |
| 3598 constantPoolHandle cp_h = pv_info->prev_constant_pool_handle(); | |
|
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|
3599 assert (!cp_h.is_null(), "null cp found in previous version"); |
|
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|
3600 |
|
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|
3601 // The caller will need to delete pv_info when they are done with it. |
| 0 | 3602 _current_p = pv_info; |
| 3603 return pv_info; | |
| 3604 } | |
| 3605 | |
|
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|
3606 // all of the underlying nodes' info has been deleted |
| 0 | 3607 return NULL; |
| 3608 } // end next_previous_version() |