Mercurial > hg > truffle
annotate src/share/vm/oops/instanceKlass.cpp @ 10370:47bdfb3d010f
8015486: PSScavenge::is_obj_in_young is unnecessarily slow with UseCompressedOops
Summary: Compare compressed oops to a compressed young gen boundary instead of uncompressing the oops before doing the young gen boundary check.
Reviewed-by: brutisso, jmasa
author | stefank |
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date | Thu, 30 May 2013 10:58:16 +0200 |
parents | 92ef81e2f571 |
children | 6bd680e9ea35 |
rev | line source |
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0 | 1 /* |
7956 | 2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "classfile/javaClasses.hpp" | |
27 #include "classfile/systemDictionary.hpp" | |
28 #include "classfile/verifier.hpp" | |
29 #include "classfile/vmSymbols.hpp" | |
30 #include "compiler/compileBroker.hpp" | |
31 #include "gc_implementation/shared/markSweep.inline.hpp" | |
32 #include "gc_interface/collectedHeap.inline.hpp" | |
33 #include "interpreter/oopMapCache.hpp" | |
34 #include "interpreter/rewriter.hpp" | |
35 #include "jvmtifiles/jvmti.h" | |
36 #include "memory/genOopClosures.inline.hpp" | |
7956 | 37 #include "memory/heapInspection.hpp" |
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38 #include "memory/metadataFactory.hpp" |
1972 | 39 #include "memory/oopFactory.hpp" |
3938 | 40 #include "oops/fieldStreams.hpp" |
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41 #include "oops/instanceClassLoaderKlass.hpp" |
1972 | 42 #include "oops/instanceKlass.hpp" |
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43 #include "oops/instanceMirrorKlass.hpp" |
1972 | 44 #include "oops/instanceOop.hpp" |
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45 #include "oops/klass.inline.hpp" |
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46 #include "oops/method.hpp" |
1972 | 47 #include "oops/oop.inline.hpp" |
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48 #include "oops/symbol.hpp" |
1972 | 49 #include "prims/jvmtiExport.hpp" |
50 #include "prims/jvmtiRedefineClassesTrace.hpp" | |
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51 #include "prims/methodComparator.hpp" |
1972 | 52 #include "runtime/fieldDescriptor.hpp" |
53 #include "runtime/handles.inline.hpp" | |
54 #include "runtime/javaCalls.hpp" | |
55 #include "runtime/mutexLocker.hpp" | |
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56 #include "runtime/thread.inline.hpp" |
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57 #include "services/classLoadingService.hpp" |
1972 | 58 #include "services/threadService.hpp" |
59 #include "utilities/dtrace.hpp" | |
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60 #include "utilities/macros.hpp" |
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61 #if INCLUDE_ALL_GCS |
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62 #include "gc_implementation/concurrentMarkSweep/cmsOopClosures.inline.hpp" |
1972 | 63 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" |
64 #include "gc_implementation/g1/g1OopClosures.inline.hpp" | |
65 #include "gc_implementation/g1/g1RemSet.inline.hpp" | |
66 #include "gc_implementation/g1/heapRegionSeq.inline.hpp" | |
67 #include "gc_implementation/parNew/parOopClosures.inline.hpp" | |
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68 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.inline.hpp" |
1972 | 69 #include "gc_implementation/parallelScavenge/psPromotionManager.inline.hpp" |
70 #include "gc_implementation/parallelScavenge/psScavenge.inline.hpp" | |
71 #include "oops/oop.pcgc.inline.hpp" | |
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72 #endif // INCLUDE_ALL_GCS |
1972 | 73 #ifdef COMPILER1 |
74 #include "c1/c1_Compiler.hpp" | |
75 #endif | |
0 | 76 |
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77 #ifdef DTRACE_ENABLED |
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78 |
4006 | 79 #ifndef USDT2 |
80 | |
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81 HS_DTRACE_PROBE_DECL4(hotspot, class__initialization__required, |
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82 char*, intptr_t, oop, intptr_t); |
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83 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__recursive, |
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84 char*, intptr_t, oop, intptr_t, int); |
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85 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__concurrent, |
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86 char*, intptr_t, oop, intptr_t, int); |
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87 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__erroneous, |
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88 char*, intptr_t, oop, intptr_t, int); |
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89 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__super__failed, |
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90 char*, intptr_t, oop, intptr_t, int); |
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91 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__clinit, |
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92 char*, intptr_t, oop, intptr_t, int); |
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93 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__error, |
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94 char*, intptr_t, oop, intptr_t, int); |
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95 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__end, |
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96 char*, intptr_t, oop, intptr_t, int); |
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97 |
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98 #define DTRACE_CLASSINIT_PROBE(type, clss, thread_type) \ |
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99 { \ |
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100 char* data = NULL; \ |
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101 int len = 0; \ |
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102 Symbol* name = (clss)->name(); \ |
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103 if (name != NULL) { \ |
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104 data = (char*)name->bytes(); \ |
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105 len = name->utf8_length(); \ |
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106 } \ |
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107 HS_DTRACE_PROBE4(hotspot, class__initialization__##type, \ |
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108 data, len, (clss)->class_loader(), thread_type); \ |
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109 } |
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110 |
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111 #define DTRACE_CLASSINIT_PROBE_WAIT(type, clss, thread_type, wait) \ |
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112 { \ |
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113 char* data = NULL; \ |
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114 int len = 0; \ |
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115 Symbol* name = (clss)->name(); \ |
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116 if (name != NULL) { \ |
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117 data = (char*)name->bytes(); \ |
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118 len = name->utf8_length(); \ |
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119 } \ |
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120 HS_DTRACE_PROBE5(hotspot, class__initialization__##type, \ |
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121 data, len, (clss)->class_loader(), thread_type, wait); \ |
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122 } |
4006 | 123 #else /* USDT2 */ |
124 | |
125 #define HOTSPOT_CLASS_INITIALIZATION_required HOTSPOT_CLASS_INITIALIZATION_REQUIRED | |
126 #define HOTSPOT_CLASS_INITIALIZATION_recursive HOTSPOT_CLASS_INITIALIZATION_RECURSIVE | |
127 #define HOTSPOT_CLASS_INITIALIZATION_concurrent HOTSPOT_CLASS_INITIALIZATION_CONCURRENT | |
128 #define HOTSPOT_CLASS_INITIALIZATION_erroneous HOTSPOT_CLASS_INITIALIZATION_ERRONEOUS | |
129 #define HOTSPOT_CLASS_INITIALIZATION_super__failed HOTSPOT_CLASS_INITIALIZATION_SUPER_FAILED | |
130 #define HOTSPOT_CLASS_INITIALIZATION_clinit HOTSPOT_CLASS_INITIALIZATION_CLINIT | |
131 #define HOTSPOT_CLASS_INITIALIZATION_error HOTSPOT_CLASS_INITIALIZATION_ERROR | |
132 #define HOTSPOT_CLASS_INITIALIZATION_end HOTSPOT_CLASS_INITIALIZATION_END | |
133 #define DTRACE_CLASSINIT_PROBE(type, clss, thread_type) \ | |
134 { \ | |
135 char* data = NULL; \ | |
136 int len = 0; \ | |
137 Symbol* name = (clss)->name(); \ | |
138 if (name != NULL) { \ | |
139 data = (char*)name->bytes(); \ | |
140 len = name->utf8_length(); \ | |
141 } \ | |
142 HOTSPOT_CLASS_INITIALIZATION_##type( \ | |
143 data, len, (clss)->class_loader(), thread_type); \ | |
144 } | |
145 | |
146 #define DTRACE_CLASSINIT_PROBE_WAIT(type, clss, thread_type, wait) \ | |
147 { \ | |
148 char* data = NULL; \ | |
149 int len = 0; \ | |
150 Symbol* name = (clss)->name(); \ | |
151 if (name != NULL) { \ | |
152 data = (char*)name->bytes(); \ | |
153 len = name->utf8_length(); \ | |
154 } \ | |
155 HOTSPOT_CLASS_INITIALIZATION_##type( \ | |
156 data, len, (clss)->class_loader(), thread_type, wait); \ | |
157 } | |
158 #endif /* USDT2 */ | |
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159 |
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160 #else // ndef DTRACE_ENABLED |
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161 |
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162 #define DTRACE_CLASSINIT_PROBE(type, clss, thread_type) |
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163 #define DTRACE_CLASSINIT_PROBE_WAIT(type, clss, thread_type, wait) |
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164 |
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165 #endif // ndef DTRACE_ENABLED |
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166 |
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167 volatile int InstanceKlass::_total_instanceKlass_count = 0; |
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168 |
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169 InstanceKlass* InstanceKlass::allocate_instance_klass( |
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170 ClassLoaderData* loader_data, |
8031 | 171 int vtable_len, |
172 int itable_len, | |
173 int static_field_size, | |
174 int nonstatic_oop_map_size, | |
175 ReferenceType rt, | |
176 AccessFlags access_flags, | |
177 Symbol* name, | |
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178 Klass* super_klass, |
8031 | 179 bool is_anonymous, |
180 TRAPS) { | |
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181 |
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182 int size = InstanceKlass::size(vtable_len, itable_len, nonstatic_oop_map_size, |
8031 | 183 access_flags.is_interface(), is_anonymous); |
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184 |
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185 // Allocation |
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186 InstanceKlass* ik; |
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187 if (rt == REF_NONE) { |
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188 if (name == vmSymbols::java_lang_Class()) { |
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189 ik = new (loader_data, size, THREAD) InstanceMirrorKlass( |
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190 vtable_len, itable_len, static_field_size, nonstatic_oop_map_size, rt, |
8031 | 191 access_flags, is_anonymous); |
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192 } else if (name == vmSymbols::java_lang_ClassLoader() || |
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193 (SystemDictionary::ClassLoader_klass_loaded() && |
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194 super_klass != NULL && |
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195 super_klass->is_subtype_of(SystemDictionary::ClassLoader_klass()))) { |
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196 ik = new (loader_data, size, THREAD) InstanceClassLoaderKlass( |
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197 vtable_len, itable_len, static_field_size, nonstatic_oop_map_size, rt, |
8031 | 198 access_flags, is_anonymous); |
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199 } else { |
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200 // normal class |
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201 ik = new (loader_data, size, THREAD) InstanceKlass( |
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202 vtable_len, itable_len, static_field_size, nonstatic_oop_map_size, rt, |
8031 | 203 access_flags, is_anonymous); |
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204 } |
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205 } else { |
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206 // reference klass |
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207 ik = new (loader_data, size, THREAD) InstanceRefKlass( |
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208 vtable_len, itable_len, static_field_size, nonstatic_oop_map_size, rt, |
8031 | 209 access_flags, is_anonymous); |
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210 } |
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211 |
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212 // Check for pending exception before adding to the loader data and incrementing |
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213 // class count. Can get OOM here. |
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214 if (HAS_PENDING_EXCEPTION) { |
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215 return NULL; |
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216 } |
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217 |
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218 // Add all classes to our internal class loader list here, |
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219 // including classes in the bootstrap (NULL) class loader. |
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220 loader_data->add_class(ik); |
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221 |
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222 Atomic::inc(&_total_instanceKlass_count); |
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223 return ik; |
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224 } |
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225 |
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226 |
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227 // copy method ordering from resource area to Metaspace |
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228 void InstanceKlass::copy_method_ordering(intArray* m, TRAPS) { |
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229 if (m != NULL) { |
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230 // allocate a new array and copy contents (memcpy?) |
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231 _method_ordering = MetadataFactory::new_array<int>(class_loader_data(), m->length(), CHECK); |
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232 for (int i = 0; i < m->length(); i++) { |
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233 _method_ordering->at_put(i, m->at(i)); |
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234 } |
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235 } else { |
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236 _method_ordering = Universe::the_empty_int_array(); |
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237 } |
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238 } |
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239 |
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240 |
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241 InstanceKlass::InstanceKlass(int vtable_len, |
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242 int itable_len, |
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243 int static_field_size, |
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244 int nonstatic_oop_map_size, |
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245 ReferenceType rt, |
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246 AccessFlags access_flags, |
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247 bool is_anonymous) { |
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248 No_Safepoint_Verifier no_safepoint; // until k becomes parsable |
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249 |
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250 int iksize = InstanceKlass::size(vtable_len, itable_len, nonstatic_oop_map_size, |
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251 access_flags.is_interface(), is_anonymous); |
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252 |
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253 set_vtable_length(vtable_len); |
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254 set_itable_length(itable_len); |
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255 set_static_field_size(static_field_size); |
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256 set_nonstatic_oop_map_size(nonstatic_oop_map_size); |
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257 set_access_flags(access_flags); |
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258 _misc_flags = 0; // initialize to zero |
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259 set_is_anonymous(is_anonymous); |
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260 assert(size() == iksize, "wrong size for object"); |
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261 |
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262 set_array_klasses(NULL); |
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263 set_methods(NULL); |
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264 set_method_ordering(NULL); |
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265 set_local_interfaces(NULL); |
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266 set_transitive_interfaces(NULL); |
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267 init_implementor(); |
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268 set_fields(NULL, 0); |
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269 set_constants(NULL); |
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270 set_class_loader_data(NULL); |
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271 set_protection_domain(NULL); |
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272 set_signers(NULL); |
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273 set_source_file_name(NULL); |
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274 set_source_debug_extension(NULL, 0); |
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275 set_array_name(NULL); |
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276 set_inner_classes(NULL); |
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277 set_static_oop_field_count(0); |
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278 set_nonstatic_field_size(0); |
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279 set_is_marked_dependent(false); |
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280 set_init_state(InstanceKlass::allocated); |
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281 set_init_thread(NULL); |
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282 set_init_lock(NULL); |
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283 set_reference_type(rt); |
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284 set_oop_map_cache(NULL); |
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285 set_jni_ids(NULL); |
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286 set_osr_nmethods_head(NULL); |
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287 set_breakpoints(NULL); |
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288 init_previous_versions(); |
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289 set_generic_signature(NULL); |
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290 release_set_methods_jmethod_ids(NULL); |
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291 release_set_methods_cached_itable_indices(NULL); |
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292 set_annotations(NULL); |
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293 set_jvmti_cached_class_field_map(NULL); |
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294 set_initial_method_idnum(0); |
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295 _dependencies = NULL; |
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296 set_jvmti_cached_class_field_map(NULL); |
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297 set_cached_class_file(NULL, 0); |
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298 set_initial_method_idnum(0); |
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299 set_minor_version(0); |
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300 set_major_version(0); |
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301 NOT_PRODUCT(_verify_count = 0;) |
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302 |
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303 // initialize the non-header words to zero |
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304 intptr_t* p = (intptr_t*)this; |
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305 for (int index = InstanceKlass::header_size(); index < iksize; index++) { |
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306 p[index] = NULL_WORD; |
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307 } |
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308 |
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309 // Set temporary value until parseClassFile updates it with the real instance |
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310 // size. |
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311 set_layout_helper(Klass::instance_layout_helper(0, true)); |
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312 } |
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313 |
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314 |
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315 void InstanceKlass::deallocate_methods(ClassLoaderData* loader_data, |
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316 Array<Method*>* methods) { |
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317 if (methods != NULL && methods != Universe::the_empty_method_array()) { |
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318 for (int i = 0; i < methods->length(); i++) { |
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319 Method* method = methods->at(i); |
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320 if (method == NULL) continue; // maybe null if error processing |
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321 // Only want to delete methods that are not executing for RedefineClasses. |
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322 // The previous version will point to them so they're not totally dangling |
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323 assert (!method->on_stack(), "shouldn't be called with methods on stack"); |
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324 MetadataFactory::free_metadata(loader_data, method); |
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325 } |
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326 MetadataFactory::free_array<Method*>(loader_data, methods); |
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327 } |
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328 } |
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329 |
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330 void InstanceKlass::deallocate_interfaces(ClassLoaderData* loader_data, |
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331 Klass* super_klass, |
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332 Array<Klass*>* local_interfaces, |
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333 Array<Klass*>* transitive_interfaces) { |
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334 // Only deallocate transitive interfaces if not empty, same as super class |
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335 // or same as local interfaces. See code in parseClassFile. |
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336 Array<Klass*>* ti = transitive_interfaces; |
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337 if (ti != Universe::the_empty_klass_array() && ti != local_interfaces) { |
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338 // check that the interfaces don't come from super class |
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339 Array<Klass*>* sti = (super_klass == NULL) ? NULL : |
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340 InstanceKlass::cast(super_klass)->transitive_interfaces(); |
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341 if (ti != sti) { |
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342 MetadataFactory::free_array<Klass*>(loader_data, ti); |
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343 } |
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344 } |
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345 |
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346 // local interfaces can be empty |
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347 if (local_interfaces != Universe::the_empty_klass_array()) { |
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348 MetadataFactory::free_array<Klass*>(loader_data, local_interfaces); |
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349 } |
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350 } |
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351 |
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352 // This function deallocates the metadata and C heap pointers that the |
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353 // InstanceKlass points to. |
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354 void InstanceKlass::deallocate_contents(ClassLoaderData* loader_data) { |
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355 |
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356 // Orphan the mirror first, CMS thinks it's still live. |
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357 if (java_mirror() != NULL) { |
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358 java_lang_Class::set_klass(java_mirror(), NULL); |
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359 } |
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360 |
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361 // Need to take this class off the class loader data list. |
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362 loader_data->remove_class(this); |
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363 |
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364 // The array_klass for this class is created later, after error handling. |
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365 // For class redefinition, we keep the original class so this scratch class |
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366 // doesn't have an array class. Either way, assert that there is nothing |
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367 // to deallocate. |
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368 assert(array_klasses() == NULL, "array classes shouldn't be created for this class yet"); |
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369 |
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370 // Release C heap allocated data that this might point to, which includes |
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371 // reference counting symbol names. |
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372 release_C_heap_structures(); |
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373 |
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374 deallocate_methods(loader_data, methods()); |
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375 set_methods(NULL); |
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376 |
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377 if (method_ordering() != Universe::the_empty_int_array()) { |
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378 MetadataFactory::free_array<int>(loader_data, method_ordering()); |
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379 } |
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380 set_method_ordering(NULL); |
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381 |
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382 // This array is in Klass, but remove it with the InstanceKlass since |
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383 // this place would be the only caller and it can share memory with transitive |
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384 // interfaces. |
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385 if (secondary_supers() != Universe::the_empty_klass_array() && |
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386 secondary_supers() != transitive_interfaces()) { |
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387 MetadataFactory::free_array<Klass*>(loader_data, secondary_supers()); |
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388 } |
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389 set_secondary_supers(NULL); |
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390 |
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391 deallocate_interfaces(loader_data, super(), local_interfaces(), transitive_interfaces()); |
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392 set_transitive_interfaces(NULL); |
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393 set_local_interfaces(NULL); |
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394 |
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395 MetadataFactory::free_array<jushort>(loader_data, fields()); |
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396 set_fields(NULL, 0); |
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397 |
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398 // If a method from a redefined class is using this constant pool, don't |
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399 // delete it, yet. The new class's previous version will point to this. |
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400 if (constants() != NULL) { |
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401 assert (!constants()->on_stack(), "shouldn't be called if anything is onstack"); |
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402 MetadataFactory::free_metadata(loader_data, constants()); |
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403 set_constants(NULL); |
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404 } |
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405 |
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406 if (inner_classes() != Universe::the_empty_short_array()) { |
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407 MetadataFactory::free_array<jushort>(loader_data, inner_classes()); |
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408 } |
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409 set_inner_classes(NULL); |
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410 |
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411 // Null out Java heap objects, although these won't be walked to keep |
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412 // alive once this InstanceKlass is deallocated. |
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413 set_protection_domain(NULL); |
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414 set_signers(NULL); |
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415 set_init_lock(NULL); |
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416 |
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417 // We should deallocate the Annotations instance |
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418 MetadataFactory::free_metadata(loader_data, annotations()); |
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419 set_annotations(NULL); |
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420 } |
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421 |
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422 bool InstanceKlass::should_be_initialized() const { |
0 | 423 return !is_initialized(); |
424 } | |
425 | |
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426 klassVtable* InstanceKlass::vtable() const { |
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427 return new klassVtable(this, start_of_vtable(), vtable_length() / vtableEntry::size()); |
0 | 428 } |
429 | |
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430 klassItable* InstanceKlass::itable() const { |
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431 return new klassItable(instanceKlassHandle(this)); |
0 | 432 } |
433 | |
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434 void InstanceKlass::eager_initialize(Thread *thread) { |
0 | 435 if (!EagerInitialization) return; |
436 | |
437 if (this->is_not_initialized()) { | |
438 // abort if the the class has a class initializer | |
439 if (this->class_initializer() != NULL) return; | |
440 | |
441 // abort if it is java.lang.Object (initialization is handled in genesis) | |
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442 Klass* super = this->super(); |
0 | 443 if (super == NULL) return; |
444 | |
445 // abort if the super class should be initialized | |
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446 if (!InstanceKlass::cast(super)->is_initialized()) return; |
0 | 447 |
448 // call body to expose the this pointer | |
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449 instanceKlassHandle this_oop(thread, this); |
0 | 450 eager_initialize_impl(this_oop); |
451 } | |
452 } | |
453 | |
454 | |
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455 void InstanceKlass::eager_initialize_impl(instanceKlassHandle this_oop) { |
0 | 456 EXCEPTION_MARK; |
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457 volatile oop init_lock = this_oop->init_lock(); |
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458 ObjectLocker ol(init_lock, THREAD); |
0 | 459 |
460 // abort if someone beat us to the initialization | |
461 if (!this_oop->is_not_initialized()) return; // note: not equivalent to is_initialized() | |
462 | |
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463 ClassState old_state = this_oop->init_state(); |
0 | 464 link_class_impl(this_oop, true, THREAD); |
465 if (HAS_PENDING_EXCEPTION) { | |
466 CLEAR_PENDING_EXCEPTION; | |
467 // Abort if linking the class throws an exception. | |
468 | |
469 // Use a test to avoid redundantly resetting the state if there's | |
470 // no change. Set_init_state() asserts that state changes make | |
471 // progress, whereas here we might just be spinning in place. | |
472 if( old_state != this_oop->_init_state ) | |
473 this_oop->set_init_state (old_state); | |
474 } else { | |
475 // linking successfull, mark class as initialized | |
476 this_oop->set_init_state (fully_initialized); | |
477 // trace | |
478 if (TraceClassInitialization) { | |
479 ResourceMark rm(THREAD); | |
480 tty->print_cr("[Initialized %s without side effects]", this_oop->external_name()); | |
481 } | |
482 } | |
483 } | |
484 | |
485 | |
486 // See "The Virtual Machine Specification" section 2.16.5 for a detailed explanation of the class initialization | |
487 // process. The step comments refers to the procedure described in that section. | |
488 // Note: implementation moved to static method to expose the this pointer. | |
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489 void InstanceKlass::initialize(TRAPS) { |
0 | 490 if (this->should_be_initialized()) { |
491 HandleMark hm(THREAD); | |
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492 instanceKlassHandle this_oop(THREAD, this); |
0 | 493 initialize_impl(this_oop, CHECK); |
494 // Note: at this point the class may be initialized | |
495 // OR it may be in the state of being initialized | |
496 // in case of recursive initialization! | |
497 } else { | |
498 assert(is_initialized(), "sanity check"); | |
499 } | |
500 } | |
501 | |
502 | |
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503 bool InstanceKlass::verify_code( |
0 | 504 instanceKlassHandle this_oop, bool throw_verifyerror, TRAPS) { |
505 // 1) Verify the bytecodes | |
506 Verifier::Mode mode = | |
507 throw_verifyerror ? Verifier::ThrowException : Verifier::NoException; | |
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508 return Verifier::verify(this_oop, mode, this_oop->should_verify_class(), CHECK_false); |
0 | 509 } |
510 | |
511 | |
512 // Used exclusively by the shared spaces dump mechanism to prevent | |
513 // classes mapped into the shared regions in new VMs from appearing linked. | |
514 | |
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515 void InstanceKlass::unlink_class() { |
0 | 516 assert(is_linked(), "must be linked"); |
517 _init_state = loaded; | |
518 } | |
519 | |
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520 void InstanceKlass::link_class(TRAPS) { |
0 | 521 assert(is_loaded(), "must be loaded"); |
522 if (!is_linked()) { | |
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523 HandleMark hm(THREAD); |
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524 instanceKlassHandle this_oop(THREAD, this); |
0 | 525 link_class_impl(this_oop, true, CHECK); |
526 } | |
527 } | |
528 | |
529 // Called to verify that a class can link during initialization, without | |
530 // throwing a VerifyError. | |
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531 bool InstanceKlass::link_class_or_fail(TRAPS) { |
0 | 532 assert(is_loaded(), "must be loaded"); |
533 if (!is_linked()) { | |
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534 HandleMark hm(THREAD); |
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535 instanceKlassHandle this_oop(THREAD, this); |
0 | 536 link_class_impl(this_oop, false, CHECK_false); |
537 } | |
538 return is_linked(); | |
539 } | |
540 | |
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541 bool InstanceKlass::link_class_impl( |
0 | 542 instanceKlassHandle this_oop, bool throw_verifyerror, TRAPS) { |
543 // check for error state | |
544 if (this_oop->is_in_error_state()) { | |
545 ResourceMark rm(THREAD); | |
546 THROW_MSG_(vmSymbols::java_lang_NoClassDefFoundError(), | |
547 this_oop->external_name(), false); | |
548 } | |
549 // return if already verified | |
550 if (this_oop->is_linked()) { | |
551 return true; | |
552 } | |
553 | |
554 // Timing | |
555 // timer handles recursion | |
556 assert(THREAD->is_Java_thread(), "non-JavaThread in link_class_impl"); | |
557 JavaThread* jt = (JavaThread*)THREAD; | |
558 | |
559 // link super class before linking this class | |
560 instanceKlassHandle super(THREAD, this_oop->super()); | |
561 if (super.not_null()) { | |
562 if (super->is_interface()) { // check if super class is an interface | |
563 ResourceMark rm(THREAD); | |
564 Exceptions::fthrow( | |
565 THREAD_AND_LOCATION, | |
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566 vmSymbols::java_lang_IncompatibleClassChangeError(), |
0 | 567 "class %s has interface %s as super class", |
568 this_oop->external_name(), | |
569 super->external_name() | |
570 ); | |
571 return false; | |
572 } | |
573 | |
574 link_class_impl(super, throw_verifyerror, CHECK_false); | |
575 } | |
576 | |
577 // link all interfaces implemented by this class before linking this class | |
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578 Array<Klass*>* interfaces = this_oop->local_interfaces(); |
0 | 579 int num_interfaces = interfaces->length(); |
580 for (int index = 0; index < num_interfaces; index++) { | |
581 HandleMark hm(THREAD); | |
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582 instanceKlassHandle ih(THREAD, interfaces->at(index)); |
0 | 583 link_class_impl(ih, throw_verifyerror, CHECK_false); |
584 } | |
585 | |
586 // in case the class is linked in the process of linking its superclasses | |
587 if (this_oop->is_linked()) { | |
588 return true; | |
589 } | |
590 | |
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591 // trace only the link time for this klass that includes |
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592 // the verification time |
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593 PerfClassTraceTime vmtimer(ClassLoader::perf_class_link_time(), |
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594 ClassLoader::perf_class_link_selftime(), |
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595 ClassLoader::perf_classes_linked(), |
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596 jt->get_thread_stat()->perf_recursion_counts_addr(), |
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597 jt->get_thread_stat()->perf_timers_addr(), |
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598 PerfClassTraceTime::CLASS_LINK); |
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599 |
0 | 600 // verification & rewriting |
601 { | |
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602 volatile oop init_lock = this_oop->init_lock(); |
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603 ObjectLocker ol(init_lock, THREAD); |
0 | 604 // rewritten will have been set if loader constraint error found |
605 // on an earlier link attempt | |
606 // don't verify or rewrite if already rewritten | |
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607 |
0 | 608 if (!this_oop->is_linked()) { |
609 if (!this_oop->is_rewritten()) { | |
610 { | |
611 // Timer includes any side effects of class verification (resolution, | |
612 // etc), but not recursive entry into verify_code(). | |
875
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613 PerfClassTraceTime timer(ClassLoader::perf_class_verify_time(), |
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614 ClassLoader::perf_class_verify_selftime(), |
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615 ClassLoader::perf_classes_verified(), |
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616 jt->get_thread_stat()->perf_recursion_counts_addr(), |
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617 jt->get_thread_stat()->perf_timers_addr(), |
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618 PerfClassTraceTime::CLASS_VERIFY); |
0 | 619 bool verify_ok = verify_code(this_oop, throw_verifyerror, THREAD); |
620 if (!verify_ok) { | |
621 return false; | |
622 } | |
623 } | |
624 | |
625 // Just in case a side-effect of verify linked this class already | |
626 // (which can sometimes happen since the verifier loads classes | |
627 // using custom class loaders, which are free to initialize things) | |
628 if (this_oop->is_linked()) { | |
629 return true; | |
630 } | |
631 | |
632 // also sets rewritten | |
633 this_oop->rewrite_class(CHECK_false); | |
634 } | |
635 | |
3748 | 636 // relocate jsrs and link methods after they are all rewritten |
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637 this_oop->link_methods(CHECK_false); |
3748 | 638 |
0 | 639 // Initialize the vtable and interface table after |
640 // methods have been rewritten since rewrite may | |
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641 // fabricate new Method*s. |
0 | 642 // also does loader constraint checking |
643 if (!this_oop()->is_shared()) { | |
644 ResourceMark rm(THREAD); | |
645 this_oop->vtable()->initialize_vtable(true, CHECK_false); | |
646 this_oop->itable()->initialize_itable(true, CHECK_false); | |
647 } | |
648 #ifdef ASSERT | |
649 else { | |
650 ResourceMark rm(THREAD); | |
651 this_oop->vtable()->verify(tty, true); | |
652 // In case itable verification is ever added. | |
653 // this_oop->itable()->verify(tty, true); | |
654 } | |
655 #endif | |
656 this_oop->set_init_state(linked); | |
657 if (JvmtiExport::should_post_class_prepare()) { | |
658 Thread *thread = THREAD; | |
659 assert(thread->is_Java_thread(), "thread->is_Java_thread()"); | |
660 JvmtiExport::post_class_prepare((JavaThread *) thread, this_oop()); | |
661 } | |
662 } | |
663 } | |
664 return true; | |
665 } | |
666 | |
667 | |
668 // Rewrite the byte codes of all of the methods of a class. | |
669 // The rewriter must be called exactly once. Rewriting must happen after | |
670 // verification but before the first method of the class is executed. | |
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671 void InstanceKlass::rewrite_class(TRAPS) { |
0 | 672 assert(is_loaded(), "must be loaded"); |
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673 instanceKlassHandle this_oop(THREAD, this); |
0 | 674 if (this_oop->is_rewritten()) { |
675 assert(this_oop()->is_shared(), "rewriting an unshared class?"); | |
676 return; | |
677 } | |
3748 | 678 Rewriter::rewrite(this_oop, CHECK); |
0 | 679 this_oop->set_rewritten(); |
680 } | |
681 | |
3748 | 682 // Now relocate and link method entry points after class is rewritten. |
683 // This is outside is_rewritten flag. In case of an exception, it can be | |
684 // executed more than once. | |
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685 void InstanceKlass::link_methods(TRAPS) { |
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686 int len = methods()->length(); |
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687 for (int i = len-1; i >= 0; i--) { |
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688 methodHandle m(THREAD, methods()->at(i)); |
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689 |
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690 // Set up method entry points for compiler and interpreter . |
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691 m->link_method(m, CHECK); |
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692 |
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693 // This is for JVMTI and unrelated to relocator but the last thing we do |
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694 #ifdef ASSERT |
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695 if (StressMethodComparator) { |
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696 ResourceMark rm(THREAD); |
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697 static int nmc = 0; |
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698 for (int j = i; j >= 0 && j >= i-4; j--) { |
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699 if ((++nmc % 1000) == 0) tty->print_cr("Have run MethodComparator %d times...", nmc); |
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700 bool z = MethodComparator::methods_EMCP(m(), |
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701 methods()->at(j)); |
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702 if (j == i && !z) { |
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703 tty->print("MethodComparator FAIL: "); m->print(); m->print_codes(); |
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704 assert(z, "method must compare equal to itself"); |
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705 } |
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706 } |
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707 } |
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708 #endif //ASSERT |
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709 } |
3748 | 710 } |
711 | |
0 | 712 |
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713 void InstanceKlass::initialize_impl(instanceKlassHandle this_oop, TRAPS) { |
0 | 714 // Make sure klass is linked (verified) before initialization |
715 // A class could already be verified, since it has been reflected upon. | |
716 this_oop->link_class(CHECK); | |
717 | |
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718 DTRACE_CLASSINIT_PROBE(required, InstanceKlass::cast(this_oop()), -1); |
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719 |
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720 bool wait = false; |
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721 |
0 | 722 // refer to the JVM book page 47 for description of steps |
723 // Step 1 | |
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724 { |
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725 volatile oop init_lock = this_oop->init_lock(); |
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726 ObjectLocker ol(init_lock, THREAD); |
0 | 727 |
728 Thread *self = THREAD; // it's passed the current thread | |
729 | |
730 // Step 2 | |
731 // If we were to use wait() instead of waitInterruptibly() then | |
732 // we might end up throwing IE from link/symbol resolution sites | |
733 // that aren't expected to throw. This would wreak havoc. See 6320309. | |
734 while(this_oop->is_being_initialized() && !this_oop->is_reentrant_initialization(self)) { | |
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735 wait = true; |
0 | 736 ol.waitUninterruptibly(CHECK); |
737 } | |
738 | |
739 // Step 3 | |
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740 if (this_oop->is_being_initialized() && this_oop->is_reentrant_initialization(self)) { |
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741 DTRACE_CLASSINIT_PROBE_WAIT(recursive, InstanceKlass::cast(this_oop()), -1,wait); |
0 | 742 return; |
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743 } |
0 | 744 |
745 // Step 4 | |
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746 if (this_oop->is_initialized()) { |
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747 DTRACE_CLASSINIT_PROBE_WAIT(concurrent, InstanceKlass::cast(this_oop()), -1,wait); |
0 | 748 return; |
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749 } |
0 | 750 |
751 // Step 5 | |
752 if (this_oop->is_in_error_state()) { | |
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753 DTRACE_CLASSINIT_PROBE_WAIT(erroneous, InstanceKlass::cast(this_oop()), -1,wait); |
0 | 754 ResourceMark rm(THREAD); |
755 const char* desc = "Could not initialize class "; | |
756 const char* className = this_oop->external_name(); | |
757 size_t msglen = strlen(desc) + strlen(className) + 1; | |
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758 char* message = NEW_RESOURCE_ARRAY(char, msglen); |
0 | 759 if (NULL == message) { |
760 // Out of memory: can't create detailed error message | |
761 THROW_MSG(vmSymbols::java_lang_NoClassDefFoundError(), className); | |
762 } else { | |
763 jio_snprintf(message, msglen, "%s%s", desc, className); | |
764 THROW_MSG(vmSymbols::java_lang_NoClassDefFoundError(), message); | |
765 } | |
766 } | |
767 | |
768 // Step 6 | |
769 this_oop->set_init_state(being_initialized); | |
770 this_oop->set_init_thread(self); | |
771 } | |
772 | |
773 // Step 7 | |
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774 Klass* super_klass = this_oop->super(); |
6983 | 775 if (super_klass != NULL && !this_oop->is_interface() && super_klass->should_be_initialized()) { |
776 super_klass->initialize(THREAD); | |
0 | 777 |
778 if (HAS_PENDING_EXCEPTION) { | |
779 Handle e(THREAD, PENDING_EXCEPTION); | |
780 CLEAR_PENDING_EXCEPTION; | |
781 { | |
782 EXCEPTION_MARK; | |
783 this_oop->set_initialization_state_and_notify(initialization_error, THREAD); // Locks object, set state, and notify all waiting threads | |
784 CLEAR_PENDING_EXCEPTION; // ignore any exception thrown, superclass initialization error is thrown below | |
785 } | |
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786 DTRACE_CLASSINIT_PROBE_WAIT(super__failed, InstanceKlass::cast(this_oop()), -1,wait); |
0 | 787 THROW_OOP(e()); |
788 } | |
789 } | |
790 | |
6934 | 791 if (this_oop->has_default_methods()) { |
792 // Step 7.5: initialize any interfaces which have default methods | |
793 for (int i = 0; i < this_oop->local_interfaces()->length(); ++i) { | |
794 Klass* iface = this_oop->local_interfaces()->at(i); | |
795 InstanceKlass* ik = InstanceKlass::cast(iface); | |
796 if (ik->has_default_methods() && ik->should_be_initialized()) { | |
797 ik->initialize(THREAD); | |
798 | |
799 if (HAS_PENDING_EXCEPTION) { | |
800 Handle e(THREAD, PENDING_EXCEPTION); | |
801 CLEAR_PENDING_EXCEPTION; | |
802 { | |
803 EXCEPTION_MARK; | |
804 // Locks object, set state, and notify all waiting threads | |
805 this_oop->set_initialization_state_and_notify( | |
806 initialization_error, THREAD); | |
807 | |
808 // ignore any exception thrown, superclass initialization error is | |
809 // thrown below | |
810 CLEAR_PENDING_EXCEPTION; | |
811 } | |
812 DTRACE_CLASSINIT_PROBE_WAIT( | |
813 super__failed, InstanceKlass::cast(this_oop()), -1, wait); | |
814 THROW_OOP(e()); | |
815 } | |
816 } | |
817 } | |
818 } | |
819 | |
0 | 820 // Step 8 |
821 { | |
822 assert(THREAD->is_Java_thread(), "non-JavaThread in initialize_impl"); | |
823 JavaThread* jt = (JavaThread*)THREAD; | |
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824 DTRACE_CLASSINIT_PROBE_WAIT(clinit, InstanceKlass::cast(this_oop()), -1,wait); |
0 | 825 // Timer includes any side effects of class initialization (resolution, |
826 // etc), but not recursive entry into call_class_initializer(). | |
875
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827 PerfClassTraceTime timer(ClassLoader::perf_class_init_time(), |
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828 ClassLoader::perf_class_init_selftime(), |
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829 ClassLoader::perf_classes_inited(), |
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830 jt->get_thread_stat()->perf_recursion_counts_addr(), |
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831 jt->get_thread_stat()->perf_timers_addr(), |
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832 PerfClassTraceTime::CLASS_CLINIT); |
0 | 833 this_oop->call_class_initializer(THREAD); |
834 } | |
835 | |
836 // Step 9 | |
837 if (!HAS_PENDING_EXCEPTION) { | |
838 this_oop->set_initialization_state_and_notify(fully_initialized, CHECK); | |
839 { ResourceMark rm(THREAD); | |
840 debug_only(this_oop->vtable()->verify(tty, true);) | |
841 } | |
842 } | |
843 else { | |
844 // Step 10 and 11 | |
845 Handle e(THREAD, PENDING_EXCEPTION); | |
846 CLEAR_PENDING_EXCEPTION; | |
847 { | |
848 EXCEPTION_MARK; | |
849 this_oop->set_initialization_state_and_notify(initialization_error, THREAD); | |
850 CLEAR_PENDING_EXCEPTION; // ignore any exception thrown, class initialization error is thrown below | |
851 } | |
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852 DTRACE_CLASSINIT_PROBE_WAIT(error, InstanceKlass::cast(this_oop()), -1,wait); |
1142 | 853 if (e->is_a(SystemDictionary::Error_klass())) { |
0 | 854 THROW_OOP(e()); |
855 } else { | |
856 JavaCallArguments args(e); | |
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857 THROW_ARG(vmSymbols::java_lang_ExceptionInInitializerError(), |
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858 vmSymbols::throwable_void_signature(), |
0 | 859 &args); |
860 } | |
861 } | |
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862 DTRACE_CLASSINIT_PROBE_WAIT(end, InstanceKlass::cast(this_oop()), -1,wait); |
0 | 863 } |
864 | |
865 | |
866 // Note: implementation moved to static method to expose the this pointer. | |
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867 void InstanceKlass::set_initialization_state_and_notify(ClassState state, TRAPS) { |
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868 instanceKlassHandle kh(THREAD, this); |
0 | 869 set_initialization_state_and_notify_impl(kh, state, CHECK); |
870 } | |
871 | |
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872 void InstanceKlass::set_initialization_state_and_notify_impl(instanceKlassHandle this_oop, ClassState state, TRAPS) { |
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873 volatile oop init_lock = this_oop->init_lock(); |
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874 ObjectLocker ol(init_lock, THREAD); |
0 | 875 this_oop->set_init_state(state); |
876 ol.notify_all(CHECK); | |
877 } | |
878 | |
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879 // The embedded _implementor field can only record one implementor. |
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880 // When there are more than one implementors, the _implementor field |
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881 // is set to the interface Klass* itself. Following are the possible |
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882 // values for the _implementor field: |
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883 // NULL - no implementor |
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884 // implementor Klass* - one implementor |
5998
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885 // self - more than one implementor |
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886 // |
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887 // The _implementor field only exists for interfaces. |
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888 void InstanceKlass::add_implementor(Klass* k) { |
0 | 889 assert(Compile_lock->owned_by_self(), ""); |
5998
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890 assert(is_interface(), "not interface"); |
0 | 891 // Filter out my subinterfaces. |
892 // (Note: Interfaces are never on the subklass list.) | |
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893 if (InstanceKlass::cast(k)->is_interface()) return; |
0 | 894 |
895 // Filter out subclasses whose supers already implement me. | |
896 // (Note: CHA must walk subclasses of direct implementors | |
897 // in order to locate indirect implementors.) | |
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898 Klass* sk = InstanceKlass::cast(k)->super(); |
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899 if (sk != NULL && InstanceKlass::cast(sk)->implements_interface(this)) |
0 | 900 // We only need to check one immediate superclass, since the |
901 // implements_interface query looks at transitive_interfaces. | |
902 // Any supers of the super have the same (or fewer) transitive_interfaces. | |
903 return; | |
904 | |
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905 Klass* ik = implementor(); |
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906 if (ik == NULL) { |
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907 set_implementor(k); |
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908 } else if (ik != this) { |
5998
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909 // There is already an implementor. Use itself as an indicator of |
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910 // more than one implementors. |
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911 set_implementor(this); |
0 | 912 } |
913 | |
914 // The implementor also implements the transitive_interfaces | |
915 for (int index = 0; index < local_interfaces()->length(); index++) { | |
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916 InstanceKlass::cast(local_interfaces()->at(index))->add_implementor(k); |
0 | 917 } |
918 } | |
919 | |
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920 void InstanceKlass::init_implementor() { |
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921 if (is_interface()) { |
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922 set_implementor(NULL); |
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923 } |
0 | 924 } |
925 | |
926 | |
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927 void InstanceKlass::process_interfaces(Thread *thread) { |
0 | 928 // link this class into the implementors list of every interface it implements |
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929 Klass* this_as_klass_oop = this; |
0 | 930 for (int i = local_interfaces()->length() - 1; i >= 0; i--) { |
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931 assert(local_interfaces()->at(i)->is_klass(), "must be a klass"); |
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932 InstanceKlass* interf = InstanceKlass::cast(local_interfaces()->at(i)); |
0 | 933 assert(interf->is_interface(), "expected interface"); |
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934 interf->add_implementor(this_as_klass_oop); |
0 | 935 } |
936 } | |
937 | |
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938 bool InstanceKlass::can_be_primary_super_slow() const { |
0 | 939 if (is_interface()) |
940 return false; | |
941 else | |
942 return Klass::can_be_primary_super_slow(); | |
943 } | |
944 | |
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945 GrowableArray<Klass*>* InstanceKlass::compute_secondary_supers(int num_extra_slots) { |
0 | 946 // The secondaries are the implemented interfaces. |
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947 InstanceKlass* ik = InstanceKlass::cast(this); |
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948 Array<Klass*>* interfaces = ik->transitive_interfaces(); |
0 | 949 int num_secondaries = num_extra_slots + interfaces->length(); |
950 if (num_secondaries == 0) { | |
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951 // Must share this for correct bootstrapping! |
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952 set_secondary_supers(Universe::the_empty_klass_array()); |
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953 return NULL; |
0 | 954 } else if (num_extra_slots == 0) { |
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955 // The secondary super list is exactly the same as the transitive interfaces. |
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956 // Redefine classes has to be careful not to delete this! |
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957 set_secondary_supers(interfaces); |
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958 return NULL; |
0 | 959 } else { |
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960 // Copy transitive interfaces to a temporary growable array to be constructed |
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961 // into the secondary super list with extra slots. |
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962 GrowableArray<Klass*>* secondaries = new GrowableArray<Klass*>(interfaces->length()); |
0 | 963 for (int i = 0; i < interfaces->length(); i++) { |
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964 secondaries->push(interfaces->at(i)); |
0 | 965 } |
966 return secondaries; | |
967 } | |
968 } | |
969 | |
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970 bool InstanceKlass::compute_is_subtype_of(Klass* k) { |
6983 | 971 if (k->is_interface()) { |
0 | 972 return implements_interface(k); |
973 } else { | |
974 return Klass::compute_is_subtype_of(k); | |
975 } | |
976 } | |
977 | |
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978 bool InstanceKlass::implements_interface(Klass* k) const { |
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979 if (this == k) return true; |
6983 | 980 assert(k->is_interface(), "should be an interface class"); |
0 | 981 for (int i = 0; i < transitive_interfaces()->length(); i++) { |
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982 if (transitive_interfaces()->at(i) == k) { |
0 | 983 return true; |
984 } | |
985 } | |
986 return false; | |
987 } | |
988 | |
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989 objArrayOop InstanceKlass::allocate_objArray(int n, int length, TRAPS) { |
0 | 990 if (length < 0) THROW_0(vmSymbols::java_lang_NegativeArraySizeException()); |
991 if (length > arrayOopDesc::max_array_length(T_OBJECT)) { | |
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992 report_java_out_of_memory("Requested array size exceeds VM limit"); |
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993 JvmtiExport::post_array_size_exhausted(); |
0 | 994 THROW_OOP_0(Universe::out_of_memory_error_array_size()); |
995 } | |
996 int size = objArrayOopDesc::object_size(length); | |
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997 Klass* ak = array_klass(n, CHECK_NULL); |
0 | 998 KlassHandle h_ak (THREAD, ak); |
999 objArrayOop o = | |
1000 (objArrayOop)CollectedHeap::array_allocate(h_ak, size, length, CHECK_NULL); | |
1001 return o; | |
1002 } | |
1003 | |
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1004 instanceOop InstanceKlass::register_finalizer(instanceOop i, TRAPS) { |
0 | 1005 if (TraceFinalizerRegistration) { |
1006 tty->print("Registered "); | |
1007 i->print_value_on(tty); | |
1008 tty->print_cr(" (" INTPTR_FORMAT ") as finalizable", (address)i); | |
1009 } | |
1010 instanceHandle h_i(THREAD, i); | |
1011 // Pass the handle as argument, JavaCalls::call expects oop as jobjects | |
1012 JavaValue result(T_VOID); | |
1013 JavaCallArguments args(h_i); | |
1014 methodHandle mh (THREAD, Universe::finalizer_register_method()); | |
1015 JavaCalls::call(&result, mh, &args, CHECK_NULL); | |
1016 return h_i(); | |
1017 } | |
1018 | |
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1019 instanceOop InstanceKlass::allocate_instance(TRAPS) { |
0 | 1020 bool has_finalizer_flag = has_finalizer(); // Query before possible GC |
1021 int size = size_helper(); // Query before forming handle. | |
1022 | |
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1023 KlassHandle h_k(THREAD, this); |
0 | 1024 |
1025 instanceOop i; | |
1026 | |
1027 i = (instanceOop)CollectedHeap::obj_allocate(h_k, size, CHECK_NULL); | |
1028 if (has_finalizer_flag && !RegisterFinalizersAtInit) { | |
1029 i = register_finalizer(i, CHECK_NULL); | |
1030 } | |
1031 return i; | |
1032 } | |
1033 | |
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1034 void InstanceKlass::check_valid_for_instantiation(bool throwError, TRAPS) { |
0 | 1035 if (is_interface() || is_abstract()) { |
1036 ResourceMark rm(THREAD); | |
1037 THROW_MSG(throwError ? vmSymbols::java_lang_InstantiationError() | |
1038 : vmSymbols::java_lang_InstantiationException(), external_name()); | |
1039 } | |
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1040 if (this == SystemDictionary::Class_klass()) { |
0 | 1041 ResourceMark rm(THREAD); |
1042 THROW_MSG(throwError ? vmSymbols::java_lang_IllegalAccessError() | |
1043 : vmSymbols::java_lang_IllegalAccessException(), external_name()); | |
1044 } | |
1045 } | |
1046 | |
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1047 Klass* InstanceKlass::array_klass_impl(bool or_null, int n, TRAPS) { |
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1048 instanceKlassHandle this_oop(THREAD, this); |
0 | 1049 return array_klass_impl(this_oop, or_null, n, THREAD); |
1050 } | |
1051 | |
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1052 Klass* InstanceKlass::array_klass_impl(instanceKlassHandle this_oop, bool or_null, int n, TRAPS) { |
0 | 1053 if (this_oop->array_klasses() == NULL) { |
1054 if (or_null) return NULL; | |
1055 | |
1056 ResourceMark rm; | |
1057 JavaThread *jt = (JavaThread *)THREAD; | |
1058 { | |
1059 // Atomic creation of array_klasses | |
1060 MutexLocker mc(Compile_lock, THREAD); // for vtables | |
1061 MutexLocker ma(MultiArray_lock, THREAD); | |
1062 | |
1063 // Check if update has already taken place | |
1064 if (this_oop->array_klasses() == NULL) { | |
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1065 Klass* k = ObjArrayKlass::allocate_objArray_klass(this_oop->class_loader_data(), 1, this_oop, CHECK_NULL); |
0 | 1066 this_oop->set_array_klasses(k); |
1067 } | |
1068 } | |
1069 } | |
1070 // _this will always be set at this point | |
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1071 ObjArrayKlass* oak = (ObjArrayKlass*)this_oop->array_klasses(); |
0 | 1072 if (or_null) { |
1073 return oak->array_klass_or_null(n); | |
1074 } | |
1075 return oak->array_klass(n, CHECK_NULL); | |
1076 } | |
1077 | |
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1078 Klass* InstanceKlass::array_klass_impl(bool or_null, TRAPS) { |
0 | 1079 return array_klass_impl(or_null, 1, THREAD); |
1080 } | |
1081 | |
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1082 void InstanceKlass::call_class_initializer(TRAPS) { |
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1083 instanceKlassHandle ik (THREAD, this); |
0 | 1084 call_class_initializer_impl(ik, THREAD); |
1085 } | |
1086 | |
1087 static int call_class_initializer_impl_counter = 0; // for debugging | |
1088 | |
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1089 Method* InstanceKlass::class_initializer() { |
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1090 Method* clinit = find_method( |
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1091 vmSymbols::class_initializer_name(), vmSymbols::void_method_signature()); |
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1092 if (clinit != NULL && clinit->has_valid_initializer_flags()) { |
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1093 return clinit; |
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1094 } |
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1095 return NULL; |
0 | 1096 } |
1097 | |
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1098 void InstanceKlass::call_class_initializer_impl(instanceKlassHandle this_oop, TRAPS) { |
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1099 if (ReplayCompiles && |
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1100 (ReplaySuppressInitializers == 1 || |
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1101 ReplaySuppressInitializers >= 2 && this_oop->class_loader() != NULL)) { |
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1102 // Hide the existence of the initializer for the purpose of replaying the compile |
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1103 return; |
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1104 } |
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1105 |
0 | 1106 methodHandle h_method(THREAD, this_oop->class_initializer()); |
1107 assert(!this_oop->is_initialized(), "we cannot initialize twice"); | |
1108 if (TraceClassInitialization) { | |
1109 tty->print("%d Initializing ", call_class_initializer_impl_counter++); | |
1110 this_oop->name()->print_value(); | |
1111 tty->print_cr("%s (" INTPTR_FORMAT ")", h_method() == NULL ? "(no method)" : "", (address)this_oop()); | |
1112 } | |
1113 if (h_method() != NULL) { | |
1114 JavaCallArguments args; // No arguments | |
1115 JavaValue result(T_VOID); | |
1116 JavaCalls::call(&result, h_method, &args, CHECK); // Static call (no args) | |
1117 } | |
1118 } | |
1119 | |
1120 | |
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1121 void InstanceKlass::mask_for(methodHandle method, int bci, |
0 | 1122 InterpreterOopMap* entry_for) { |
1123 // Dirty read, then double-check under a lock. | |
1124 if (_oop_map_cache == NULL) { | |
1125 // Otherwise, allocate a new one. | |
1126 MutexLocker x(OopMapCacheAlloc_lock); | |
1127 // First time use. Allocate a cache in C heap | |
1128 if (_oop_map_cache == NULL) { | |
1129 _oop_map_cache = new OopMapCache(); | |
1130 } | |
1131 } | |
1132 // _oop_map_cache is constant after init; lookup below does is own locking. | |
1133 _oop_map_cache->lookup(method, bci, entry_for); | |
1134 } | |
1135 | |
1136 | |
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1137 bool InstanceKlass::find_local_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const { |
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1138 for (JavaFieldStream fs(this); !fs.done(); fs.next()) { |
3938 | 1139 Symbol* f_name = fs.name(); |
1140 Symbol* f_sig = fs.signature(); | |
0 | 1141 if (f_name == name && f_sig == sig) { |
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1142 fd->initialize(const_cast<InstanceKlass*>(this), fs.index()); |
0 | 1143 return true; |
1144 } | |
1145 } | |
1146 return false; | |
1147 } | |
1148 | |
1149 | |
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1150 Klass* InstanceKlass::find_interface_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const { |
0 | 1151 const int n = local_interfaces()->length(); |
1152 for (int i = 0; i < n; i++) { | |
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1153 Klass* intf1 = local_interfaces()->at(i); |
6983 | 1154 assert(intf1->is_interface(), "just checking type"); |
0 | 1155 // search for field in current interface |
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1156 if (InstanceKlass::cast(intf1)->find_local_field(name, sig, fd)) { |
0 | 1157 assert(fd->is_static(), "interface field must be static"); |
1158 return intf1; | |
1159 } | |
1160 // search for field in direct superinterfaces | |
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1161 Klass* intf2 = InstanceKlass::cast(intf1)->find_interface_field(name, sig, fd); |
0 | 1162 if (intf2 != NULL) return intf2; |
1163 } | |
1164 // otherwise field lookup fails | |
1165 return NULL; | |
1166 } | |
1167 | |
1168 | |
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1169 Klass* InstanceKlass::find_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const { |
0 | 1170 // search order according to newest JVM spec (5.4.3.2, p.167). |
1171 // 1) search for field in current klass | |
1172 if (find_local_field(name, sig, fd)) { | |
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1173 return const_cast<InstanceKlass*>(this); |
0 | 1174 } |
1175 // 2) search for field recursively in direct superinterfaces | |
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1176 { Klass* intf = find_interface_field(name, sig, fd); |
0 | 1177 if (intf != NULL) return intf; |
1178 } | |
1179 // 3) apply field lookup recursively if superclass exists | |
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1180 { Klass* supr = super(); |
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1181 if (supr != NULL) return InstanceKlass::cast(supr)->find_field(name, sig, fd); |
0 | 1182 } |
1183 // 4) otherwise field lookup fails | |
1184 return NULL; | |
1185 } | |
1186 | |
1187 | |
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1188 Klass* InstanceKlass::find_field(Symbol* name, Symbol* sig, bool is_static, fieldDescriptor* fd) const { |
0 | 1189 // search order according to newest JVM spec (5.4.3.2, p.167). |
1190 // 1) search for field in current klass | |
1191 if (find_local_field(name, sig, fd)) { | |
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1192 if (fd->is_static() == is_static) return const_cast<InstanceKlass*>(this); |
0 | 1193 } |
1194 // 2) search for field recursively in direct superinterfaces | |
1195 if (is_static) { | |
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1196 Klass* intf = find_interface_field(name, sig, fd); |
0 | 1197 if (intf != NULL) return intf; |
1198 } | |
1199 // 3) apply field lookup recursively if superclass exists | |
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1200 { Klass* supr = super(); |
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1201 if (supr != NULL) return InstanceKlass::cast(supr)->find_field(name, sig, is_static, fd); |
0 | 1202 } |
1203 // 4) otherwise field lookup fails | |
1204 return NULL; | |
1205 } | |
1206 | |
1207 | |
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1208 bool InstanceKlass::find_local_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const { |
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1209 for (JavaFieldStream fs(this); !fs.done(); fs.next()) { |
3938 | 1210 if (fs.offset() == offset) { |
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1211 fd->initialize(const_cast<InstanceKlass*>(this), fs.index()); |
0 | 1212 if (fd->is_static() == is_static) return true; |
1213 } | |
1214 } | |
1215 return false; | |
1216 } | |
1217 | |
1218 | |
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1219 bool InstanceKlass::find_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const { |
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1220 Klass* klass = const_cast<InstanceKlass*>(this); |
0 | 1221 while (klass != NULL) { |
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1222 if (InstanceKlass::cast(klass)->find_local_field_from_offset(offset, is_static, fd)) { |
0 | 1223 return true; |
1224 } | |
6983 | 1225 klass = klass->super(); |
0 | 1226 } |
1227 return false; | |
1228 } | |
1229 | |
1230 | |
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1231 void InstanceKlass::methods_do(void f(Method* method)) { |
0 | 1232 int len = methods()->length(); |
1233 for (int index = 0; index < len; index++) { | |
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1234 Method* m = methods()->at(index); |
0 | 1235 assert(m->is_method(), "must be method"); |
1236 f(m); | |
1237 } | |
1238 } | |
1239 | |
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1240 |
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1241 void InstanceKlass::do_local_static_fields(FieldClosure* cl) { |
3938 | 1242 for (JavaFieldStream fs(this); !fs.done(); fs.next()) { |
1243 if (fs.access_flags().is_static()) { | |
1244 fieldDescriptor fd; | |
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1245 fd.initialize(this, fs.index()); |
3938 | 1246 cl->do_field(&fd); |
1247 } | |
0 | 1248 } |
1249 } | |
1250 | |
1251 | |
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1252 void InstanceKlass::do_local_static_fields(void f(fieldDescriptor*, TRAPS), TRAPS) { |
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1253 instanceKlassHandle h_this(THREAD, this); |
0 | 1254 do_local_static_fields_impl(h_this, f, CHECK); |
1255 } | |
1256 | |
1257 | |
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1258 void InstanceKlass::do_local_static_fields_impl(instanceKlassHandle this_oop, void f(fieldDescriptor* fd, TRAPS), TRAPS) { |
3938 | 1259 for (JavaFieldStream fs(this_oop()); !fs.done(); fs.next()) { |
1260 if (fs.access_flags().is_static()) { | |
1261 fieldDescriptor fd; | |
1262 fd.initialize(this_oop(), fs.index()); | |
1263 f(&fd, CHECK); | |
1264 } | |
0 | 1265 } |
1266 } | |
1267 | |
1268 | |
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1269 static int compare_fields_by_offset(int* a, int* b) { |
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1270 return a[0] - b[0]; |
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1271 } |
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1272 |
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1273 void InstanceKlass::do_nonstatic_fields(FieldClosure* cl) { |
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1274 InstanceKlass* super = superklass(); |
0 | 1275 if (super != NULL) { |
1276 super->do_nonstatic_fields(cl); | |
1277 } | |
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1278 fieldDescriptor fd; |
3938 | 1279 int length = java_fields_count(); |
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1280 // In DebugInfo nonstatic fields are sorted by offset. |
6197 | 1281 int* fields_sorted = NEW_C_HEAP_ARRAY(int, 2*(length+1), mtClass); |
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1282 int j = 0; |
3938 | 1283 for (int i = 0; i < length; i += 1) { |
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1284 fd.initialize(this, i); |
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1285 if (!fd.is_static()) { |
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1286 fields_sorted[j + 0] = fd.offset(); |
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1287 fields_sorted[j + 1] = i; |
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1288 j += 2; |
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1289 } |
0 | 1290 } |
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1291 if (j > 0) { |
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1292 length = j; |
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1293 // _sort_Fn is defined in growableArray.hpp. |
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1294 qsort(fields_sorted, length/2, 2*sizeof(int), (_sort_Fn)compare_fields_by_offset); |
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1295 for (int i = 0; i < length; i += 2) { |
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1296 fd.initialize(this, fields_sorted[i + 1]); |
44
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1297 assert(!fd.is_static() && fd.offset() == fields_sorted[i], "only nonstatic fields"); |
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1298 cl->do_field(&fd); |
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1299 } |
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1300 } |
6197 | 1301 FREE_C_HEAP_ARRAY(int, fields_sorted, mtClass); |
0 | 1302 } |
1303 | |
1304 | |
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1305 void InstanceKlass::array_klasses_do(void f(Klass* k, TRAPS), TRAPS) { |
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1306 if (array_klasses() != NULL) |
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1307 ArrayKlass::cast(array_klasses())->array_klasses_do(f, THREAD); |
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1308 } |
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1309 |
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1310 void InstanceKlass::array_klasses_do(void f(Klass* k)) { |
0 | 1311 if (array_klasses() != NULL) |
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1312 ArrayKlass::cast(array_klasses())->array_klasses_do(f); |
0 | 1313 } |
1314 | |
1315 | |
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1316 void InstanceKlass::with_array_klasses_do(void f(Klass* k)) { |
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1317 f(this); |
0 | 1318 array_klasses_do(f); |
1319 } | |
1320 | |
1321 #ifdef ASSERT | |
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1322 static int linear_search(Array<Method*>* methods, Symbol* name, Symbol* signature) { |
0 | 1323 int len = methods->length(); |
1324 for (int index = 0; index < len; index++) { | |
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1325 Method* m = methods->at(index); |
0 | 1326 assert(m->is_method(), "must be method"); |
1327 if (m->signature() == signature && m->name() == name) { | |
1328 return index; | |
1329 } | |
1330 } | |
1331 return -1; | |
1332 } | |
1333 #endif | |
1334 | |
6934 | 1335 static int binary_search(Array<Method*>* methods, Symbol* name) { |
0 | 1336 int len = methods->length(); |
1337 // methods are sorted, so do binary search | |
1338 int l = 0; | |
1339 int h = len - 1; | |
1340 while (l <= h) { | |
1341 int mid = (l + h) >> 1; | |
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1342 Method* m = methods->at(mid); |
0 | 1343 assert(m->is_method(), "must be method"); |
1344 int res = m->name()->fast_compare(name); | |
1345 if (res == 0) { | |
6934 | 1346 return mid; |
0 | 1347 } else if (res < 0) { |
1348 l = mid + 1; | |
1349 } else { | |
1350 h = mid - 1; | |
1351 } | |
1352 } | |
6934 | 1353 return -1; |
1354 } | |
1355 | |
1356 Method* InstanceKlass::find_method(Symbol* name, Symbol* signature) const { | |
1357 return InstanceKlass::find_method(methods(), name, signature); | |
1358 } | |
1359 | |
1360 Method* InstanceKlass::find_method( | |
1361 Array<Method*>* methods, Symbol* name, Symbol* signature) { | |
1362 int hit = binary_search(methods, name); | |
1363 if (hit != -1) { | |
1364 Method* m = methods->at(hit); | |
1365 // Do linear search to find matching signature. First, quick check | |
1366 // for common case | |
1367 if (m->signature() == signature) return m; | |
1368 // search downwards through overloaded methods | |
1369 int i; | |
1370 for (i = hit - 1; i >= 0; --i) { | |
1371 Method* m = methods->at(i); | |
1372 assert(m->is_method(), "must be method"); | |
1373 if (m->name() != name) break; | |
1374 if (m->signature() == signature) return m; | |
1375 } | |
1376 // search upwards | |
1377 for (i = hit + 1; i < methods->length(); ++i) { | |
1378 Method* m = methods->at(i); | |
1379 assert(m->is_method(), "must be method"); | |
1380 if (m->name() != name) break; | |
1381 if (m->signature() == signature) return m; | |
1382 } | |
1383 // not found | |
0 | 1384 #ifdef ASSERT |
6934 | 1385 int index = linear_search(methods, name, signature); |
1386 assert(index == -1, err_msg("binary search should have found entry %d", index)); | |
0 | 1387 #endif |
6934 | 1388 } |
0 | 1389 return NULL; |
1390 } | |
1391 | |
6934 | 1392 int InstanceKlass::find_method_by_name(Symbol* name, int* end) { |
1393 return find_method_by_name(methods(), name, end); | |
1394 } | |
1395 | |
1396 int InstanceKlass::find_method_by_name( | |
1397 Array<Method*>* methods, Symbol* name, int* end_ptr) { | |
1398 assert(end_ptr != NULL, "just checking"); | |
1399 int start = binary_search(methods, name); | |
1400 int end = start + 1; | |
1401 if (start != -1) { | |
1402 while (start - 1 >= 0 && (methods->at(start - 1))->name() == name) --start; | |
1403 while (end < methods->length() && (methods->at(end))->name() == name) ++end; | |
1404 *end_ptr = end; | |
1405 return start; | |
1406 } | |
1407 return -1; | |
1408 } | |
1409 | |
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1410 Method* InstanceKlass::uncached_lookup_method(Symbol* name, Symbol* signature) const { |
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1411 Klass* klass = const_cast<InstanceKlass*>(this); |
0 | 1412 while (klass != NULL) { |
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1413 Method* method = InstanceKlass::cast(klass)->find_method(name, signature); |
0 | 1414 if (method != NULL) return method; |
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1415 klass = InstanceKlass::cast(klass)->super(); |
0 | 1416 } |
1417 return NULL; | |
1418 } | |
1419 | |
1420 // lookup a method in all the interfaces that this class implements | |
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1421 Method* InstanceKlass::lookup_method_in_all_interfaces(Symbol* name, |
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1422 Symbol* signature) const { |
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1423 Array<Klass*>* all_ifs = transitive_interfaces(); |
0 | 1424 int num_ifs = all_ifs->length(); |
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1425 InstanceKlass *ik = NULL; |
0 | 1426 for (int i = 0; i < num_ifs; i++) { |
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1427 ik = InstanceKlass::cast(all_ifs->at(i)); |
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1428 Method* m = ik->lookup_method(name, signature); |
0 | 1429 if (m != NULL) { |
1430 return m; | |
1431 } | |
1432 } | |
1433 return NULL; | |
1434 } | |
1435 | |
1436 /* jni_id_for_impl for jfieldIds only */ | |
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1437 JNIid* InstanceKlass::jni_id_for_impl(instanceKlassHandle this_oop, int offset) { |
0 | 1438 MutexLocker ml(JfieldIdCreation_lock); |
1439 // Retry lookup after we got the lock | |
1440 JNIid* probe = this_oop->jni_ids() == NULL ? NULL : this_oop->jni_ids()->find(offset); | |
1441 if (probe == NULL) { | |
1442 // Slow case, allocate new static field identifier | |
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1443 probe = new JNIid(this_oop(), offset, this_oop->jni_ids()); |
0 | 1444 this_oop->set_jni_ids(probe); |
1445 } | |
1446 return probe; | |
1447 } | |
1448 | |
1449 | |
1450 /* jni_id_for for jfieldIds only */ | |
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1451 JNIid* InstanceKlass::jni_id_for(int offset) { |
0 | 1452 JNIid* probe = jni_ids() == NULL ? NULL : jni_ids()->find(offset); |
1453 if (probe == NULL) { | |
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1454 probe = jni_id_for_impl(this, offset); |
0 | 1455 } |
1456 return probe; | |
1457 } | |
1458 | |
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1459 u2 InstanceKlass::enclosing_method_data(int offset) { |
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1460 Array<jushort>* inner_class_list = inner_classes(); |
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1461 if (inner_class_list == NULL) { |
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1462 return 0; |
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1463 } |
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1464 int length = inner_class_list->length(); |
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1465 if (length % inner_class_next_offset == 0) { |
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1466 return 0; |
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1467 } else { |
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1468 int index = length - enclosing_method_attribute_size; |
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1469 assert(offset < enclosing_method_attribute_size, "invalid offset"); |
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1470 return inner_class_list->at(index + offset); |
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1471 } |
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1472 } |
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1473 |
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1474 void InstanceKlass::set_enclosing_method_indices(u2 class_index, |
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1475 u2 method_index) { |
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1476 Array<jushort>* inner_class_list = inner_classes(); |
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1477 assert (inner_class_list != NULL, "_inner_classes list is not set up"); |
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1478 int length = inner_class_list->length(); |
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1479 if (length % inner_class_next_offset == enclosing_method_attribute_size) { |
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1480 int index = length - enclosing_method_attribute_size; |
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1481 inner_class_list->at_put( |
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1482 index + enclosing_method_class_index_offset, class_index); |
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1483 inner_class_list->at_put( |
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1484 index + enclosing_method_method_index_offset, method_index); |
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1485 } |
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1486 } |
0 | 1487 |
1488 // Lookup or create a jmethodID. | |
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1489 // This code is called by the VMThread and JavaThreads so the |
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1490 // locking has to be done very carefully to avoid deadlocks |
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1491 // and/or other cache consistency problems. |
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1492 // |
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1493 jmethodID InstanceKlass::get_jmethod_id(instanceKlassHandle ik_h, methodHandle method_h) { |
0 | 1494 size_t idnum = (size_t)method_h->method_idnum(); |
1495 jmethodID* jmeths = ik_h->methods_jmethod_ids_acquire(); | |
1496 size_t length = 0; | |
1497 jmethodID id = NULL; | |
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1498 |
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1499 // We use a double-check locking idiom here because this cache is |
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1500 // performance sensitive. In the normal system, this cache only |
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1501 // transitions from NULL to non-NULL which is safe because we use |
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1502 // release_set_methods_jmethod_ids() to advertise the new cache. |
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1503 // A partially constructed cache should never be seen by a racing |
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1504 // thread. We also use release_store_ptr() to save a new jmethodID |
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1505 // in the cache so a partially constructed jmethodID should never be |
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1506 // seen either. Cache reads of existing jmethodIDs proceed without a |
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1507 // lock, but cache writes of a new jmethodID requires uniqueness and |
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1508 // creation of the cache itself requires no leaks so a lock is |
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1509 // generally acquired in those two cases. |
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1510 // |
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1511 // If the RedefineClasses() API has been used, then this cache can |
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1512 // grow and we'll have transitions from non-NULL to bigger non-NULL. |
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1513 // Cache creation requires no leaks and we require safety between all |
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1514 // cache accesses and freeing of the old cache so a lock is generally |
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1515 // acquired when the RedefineClasses() API has been used. |
0 | 1516 |
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1517 if (jmeths != NULL) { |
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1518 // the cache already exists |
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1519 if (!ik_h->idnum_can_increment()) { |
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1520 // the cache can't grow so we can just get the current values |
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1521 get_jmethod_id_length_value(jmeths, idnum, &length, &id); |
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1522 } else { |
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1523 // cache can grow so we have to be more careful |
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1524 if (Threads::number_of_threads() == 0 || |
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1525 SafepointSynchronize::is_at_safepoint()) { |
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1526 // we're single threaded or at a safepoint - no locking needed |
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1527 get_jmethod_id_length_value(jmeths, idnum, &length, &id); |
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1528 } else { |
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1529 MutexLocker ml(JmethodIdCreation_lock); |
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1530 get_jmethod_id_length_value(jmeths, idnum, &length, &id); |
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1531 } |
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1532 } |
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1533 } |
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1534 // implied else: |
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1535 // we need to allocate a cache so default length and id values are good |
0 | 1536 |
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1537 if (jmeths == NULL || // no cache yet |
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1538 length <= idnum || // cache is too short |
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1539 id == NULL) { // cache doesn't contain entry |
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1540 |
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1541 // This function can be called by the VMThread so we have to do all |
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1542 // things that might block on a safepoint before grabbing the lock. |
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1543 // Otherwise, we can deadlock with the VMThread or have a cache |
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1544 // consistency issue. These vars keep track of what we might have |
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1545 // to free after the lock is dropped. |
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1546 jmethodID to_dealloc_id = NULL; |
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1547 jmethodID* to_dealloc_jmeths = NULL; |
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1548 |
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1549 // may not allocate new_jmeths or use it if we allocate it |
0 | 1550 jmethodID* new_jmeths = NULL; |
1551 if (length <= idnum) { | |
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1552 // allocate a new cache that might be used |
0 | 1553 size_t size = MAX2(idnum+1, (size_t)ik_h->idnum_allocated_count()); |
6197 | 1554 new_jmeths = NEW_C_HEAP_ARRAY(jmethodID, size+1, mtClass); |
0 | 1555 memset(new_jmeths, 0, (size+1)*sizeof(jmethodID)); |
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1556 // cache size is stored in element[0], other elements offset by one |
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1557 new_jmeths[0] = (jmethodID)size; |
0 | 1558 } |
1559 | |
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1560 // allocate a new jmethodID that might be used |
0 | 1561 jmethodID new_id = NULL; |
1562 if (method_h->is_old() && !method_h->is_obsolete()) { | |
1563 // The method passed in is old (but not obsolete), we need to use the current version | |
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1564 Method* current_method = ik_h->method_with_idnum((int)idnum); |
0 | 1565 assert(current_method != NULL, "old and but not obsolete, so should exist"); |
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1566 new_id = Method::make_jmethod_id(ik_h->class_loader_data(), current_method); |
0 | 1567 } else { |
1568 // It is the current version of the method or an obsolete method, | |
1569 // use the version passed in | |
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1570 new_id = Method::make_jmethod_id(ik_h->class_loader_data(), method_h()); |
0 | 1571 } |
1572 | |
977
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1573 if (Threads::number_of_threads() == 0 || |
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1574 SafepointSynchronize::is_at_safepoint()) { |
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1575 // we're single threaded or at a safepoint - no locking needed |
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1576 id = get_jmethod_id_fetch_or_update(ik_h, idnum, new_id, new_jmeths, |
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1577 &to_dealloc_id, &to_dealloc_jmeths); |
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1578 } else { |
0 | 1579 MutexLocker ml(JmethodIdCreation_lock); |
977
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1580 id = get_jmethod_id_fetch_or_update(ik_h, idnum, new_id, new_jmeths, |
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1581 &to_dealloc_id, &to_dealloc_jmeths); |
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1582 } |
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1583 |
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1584 // The lock has been dropped so we can free resources. |
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1585 // Free up either the old cache or the new cache if we allocated one. |
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1586 if (to_dealloc_jmeths != NULL) { |
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1587 FreeHeap(to_dealloc_jmeths); |
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1588 } |
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1589 // free up the new ID since it wasn't needed |
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1590 if (to_dealloc_id != NULL) { |
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1591 Method::destroy_jmethod_id(ik_h->class_loader_data(), to_dealloc_id); |
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1592 } |
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1593 } |
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1594 return id; |
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1595 } |
0 | 1596 |
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1597 |
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1598 // Common code to fetch the jmethodID from the cache or update the |
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1599 // cache with the new jmethodID. This function should never do anything |
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1600 // that causes the caller to go to a safepoint or we can deadlock with |
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1601 // the VMThread or have cache consistency issues. |
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1602 // |
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1603 jmethodID InstanceKlass::get_jmethod_id_fetch_or_update( |
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1604 instanceKlassHandle ik_h, size_t idnum, jmethodID new_id, |
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1605 jmethodID* new_jmeths, jmethodID* to_dealloc_id_p, |
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1606 jmethodID** to_dealloc_jmeths_p) { |
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1607 assert(new_id != NULL, "sanity check"); |
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1608 assert(to_dealloc_id_p != NULL, "sanity check"); |
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1609 assert(to_dealloc_jmeths_p != NULL, "sanity check"); |
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1610 assert(Threads::number_of_threads() == 0 || |
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1611 SafepointSynchronize::is_at_safepoint() || |
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1612 JmethodIdCreation_lock->owned_by_self(), "sanity check"); |
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1613 |
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1614 // reacquire the cache - we are locked, single threaded or at a safepoint |
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1615 jmethodID* jmeths = ik_h->methods_jmethod_ids_acquire(); |
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1616 jmethodID id = NULL; |
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1617 size_t length = 0; |
0 | 1618 |
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1619 if (jmeths == NULL || // no cache yet |
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1620 (length = (size_t)jmeths[0]) <= idnum) { // cache is too short |
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1621 if (jmeths != NULL) { |
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1622 // copy any existing entries from the old cache |
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1623 for (size_t index = 0; index < length; index++) { |
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1624 new_jmeths[index+1] = jmeths[index+1]; |
0 | 1625 } |
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1626 *to_dealloc_jmeths_p = jmeths; // save old cache for later delete |
0 | 1627 } |
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1628 ik_h->release_set_methods_jmethod_ids(jmeths = new_jmeths); |
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1629 } else { |
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1630 // fetch jmethodID (if any) from the existing cache |
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1631 id = jmeths[idnum+1]; |
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1632 *to_dealloc_jmeths_p = new_jmeths; // save new cache for later delete |
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1633 } |
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1634 if (id == NULL) { |
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1635 // No matching jmethodID in the existing cache or we have a new |
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1636 // cache or we just grew the cache. This cache write is done here |
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1637 // by the first thread to win the foot race because a jmethodID |
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1638 // needs to be unique once it is generally available. |
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1639 id = new_id; |
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1640 |
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1641 // The jmethodID cache can be read while unlocked so we have to |
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1642 // make sure the new jmethodID is complete before installing it |
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1643 // in the cache. |
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1644 OrderAccess::release_store_ptr(&jmeths[idnum+1], id); |
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1645 } else { |
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1646 *to_dealloc_id_p = new_id; // save new id for later delete |
0 | 1647 } |
1648 return id; | |
1649 } | |
1650 | |
1651 | |
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1652 // Common code to get the jmethodID cache length and the jmethodID |
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1653 // value at index idnum if there is one. |
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1654 // |
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1655 void InstanceKlass::get_jmethod_id_length_value(jmethodID* cache, |
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1656 size_t idnum, size_t *length_p, jmethodID* id_p) { |
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1657 assert(cache != NULL, "sanity check"); |
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1658 assert(length_p != NULL, "sanity check"); |
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1659 assert(id_p != NULL, "sanity check"); |
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1660 |
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1661 // cache size is stored in element[0], other elements offset by one |
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1662 *length_p = (size_t)cache[0]; |
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1663 if (*length_p <= idnum) { // cache is too short |
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1664 *id_p = NULL; |
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1665 } else { |
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1666 *id_p = cache[idnum+1]; // fetch jmethodID (if any) |
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1667 } |
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1668 } |
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1669 |
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1670 |
0 | 1671 // Lookup a jmethodID, NULL if not found. Do no blocking, no allocations, no handles |
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1672 jmethodID InstanceKlass::jmethod_id_or_null(Method* method) { |
0 | 1673 size_t idnum = (size_t)method->method_idnum(); |
1674 jmethodID* jmeths = methods_jmethod_ids_acquire(); | |
1675 size_t length; // length assigned as debugging crumb | |
1676 jmethodID id = NULL; | |
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1677 if (jmeths != NULL && // If there is a cache |
0 | 1678 (length = (size_t)jmeths[0]) > idnum) { // and if it is long enough, |
1679 id = jmeths[idnum+1]; // Look up the id (may be NULL) | |
1680 } | |
1681 return id; | |
1682 } | |
1683 | |
1684 | |
1685 // Cache an itable index | |
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1686 void InstanceKlass::set_cached_itable_index(size_t idnum, int index) { |
0 | 1687 int* indices = methods_cached_itable_indices_acquire(); |
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1688 int* to_dealloc_indices = NULL; |
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1689 |
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1690 // We use a double-check locking idiom here because this cache is |
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1691 // performance sensitive. In the normal system, this cache only |
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1692 // transitions from NULL to non-NULL which is safe because we use |
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1693 // release_set_methods_cached_itable_indices() to advertise the |
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1694 // new cache. A partially constructed cache should never be seen |
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1695 // by a racing thread. Cache reads and writes proceed without a |
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1696 // lock, but creation of the cache itself requires no leaks so a |
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1697 // lock is generally acquired in that case. |
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1698 // |
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1699 // If the RedefineClasses() API has been used, then this cache can |
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1700 // grow and we'll have transitions from non-NULL to bigger non-NULL. |
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1701 // Cache creation requires no leaks and we require safety between all |
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1702 // cache accesses and freeing of the old cache so a lock is generally |
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1703 // acquired when the RedefineClasses() API has been used. |
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1704 |
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1705 if (indices == NULL || idnum_can_increment()) { |
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1706 // we need a cache or the cache can grow |
0 | 1707 MutexLocker ml(JNICachedItableIndex_lock); |
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1708 // reacquire the cache to see if another thread already did the work |
0 | 1709 indices = methods_cached_itable_indices_acquire(); |
1710 size_t length = 0; | |
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1711 // cache size is stored in element[0], other elements offset by one |
0 | 1712 if (indices == NULL || (length = (size_t)indices[0]) <= idnum) { |
1713 size_t size = MAX2(idnum+1, (size_t)idnum_allocated_count()); | |
6197 | 1714 int* new_indices = NEW_C_HEAP_ARRAY(int, size+1, mtClass); |
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1715 new_indices[0] = (int)size; |
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1716 // copy any existing entries |
0 | 1717 size_t i; |
1718 for (i = 0; i < length; i++) { | |
1719 new_indices[i+1] = indices[i+1]; | |
1720 } | |
1721 // Set all the rest to -1 | |
1722 for (i = length; i < size; i++) { | |
1723 new_indices[i+1] = -1; | |
1724 } | |
1725 if (indices != NULL) { | |
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1726 // We have an old cache to delete so save it for after we |
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1727 // drop the lock. |
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1728 to_dealloc_indices = indices; |
0 | 1729 } |
1730 release_set_methods_cached_itable_indices(indices = new_indices); | |
1731 } | |
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1732 |
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1733 if (idnum_can_increment()) { |
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1734 // this cache can grow so we have to write to it safely |
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1735 indices[idnum+1] = index; |
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1736 } |
0 | 1737 } else { |
1738 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); | |
1739 } | |
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1740 |
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1741 if (!idnum_can_increment()) { |
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1742 // The cache cannot grow and this JNI itable index value does not |
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1743 // have to be unique like a jmethodID. If there is a race to set it, |
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1744 // it doesn't matter. |
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1745 indices[idnum+1] = index; |
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1746 } |
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1747 |
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1748 if (to_dealloc_indices != NULL) { |
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1749 // we allocated a new cache so free the old one |
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1750 FreeHeap(to_dealloc_indices); |
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1751 } |
0 | 1752 } |
1753 | |
1754 | |
1755 // Retrieve a cached itable index | |
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1756 int InstanceKlass::cached_itable_index(size_t idnum) { |
0 | 1757 int* indices = methods_cached_itable_indices_acquire(); |
1758 if (indices != NULL && ((size_t)indices[0]) > idnum) { | |
1759 // indices exist and are long enough, retrieve possible cached | |
1760 return indices[idnum+1]; | |
1761 } | |
1762 return -1; | |
1763 } | |
1764 | |
1765 | |
1766 // | |
1767 // Walk the list of dependent nmethods searching for nmethods which | |
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1768 // are dependent on the changes that were passed in and mark them for |
0 | 1769 // deoptimization. Returns the number of nmethods found. |
1770 // | |
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1771 int InstanceKlass::mark_dependent_nmethods(DepChange& changes) { |
0 | 1772 assert_locked_or_safepoint(CodeCache_lock); |
1773 int found = 0; | |
1774 nmethodBucket* b = _dependencies; | |
1775 while (b != NULL) { | |
1776 nmethod* nm = b->get_nmethod(); | |
1777 // since dependencies aren't removed until an nmethod becomes a zombie, | |
1778 // the dependency list may contain nmethods which aren't alive. | |
1779 if (nm->is_alive() && !nm->is_marked_for_deoptimization() && nm->check_dependency_on(changes)) { | |
1780 if (TraceDependencies) { | |
1781 ResourceMark rm; | |
1782 tty->print_cr("Marked for deoptimization"); | |
1783 tty->print_cr(" context = %s", this->external_name()); | |
1784 changes.print(); | |
1785 nm->print(); | |
1786 nm->print_dependencies(); | |
1787 } | |
1788 nm->mark_for_deoptimization(); | |
1789 found++; | |
1790 } | |
1791 b = b->next(); | |
1792 } | |
1793 return found; | |
1794 } | |
1795 | |
1796 | |
1797 // | |
1798 // Add an nmethodBucket to the list of dependencies for this nmethod. | |
1799 // It's possible that an nmethod has multiple dependencies on this klass | |
1800 // so a count is kept for each bucket to guarantee that creation and | |
1801 // deletion of dependencies is consistent. | |
1802 // | |
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1803 void InstanceKlass::add_dependent_nmethod(nmethod* nm) { |
0 | 1804 assert_locked_or_safepoint(CodeCache_lock); |
1805 nmethodBucket* b = _dependencies; | |
1806 nmethodBucket* last = NULL; | |
1807 while (b != NULL) { | |
1808 if (nm == b->get_nmethod()) { | |
1809 b->increment(); | |
1810 return; | |
1811 } | |
1812 b = b->next(); | |
1813 } | |
1814 _dependencies = new nmethodBucket(nm, _dependencies); | |
1815 } | |
1816 | |
1817 | |
1818 // | |
1819 // Decrement count of the nmethod in the dependency list and remove | |
1820 // the bucket competely when the count goes to 0. This method must | |
1821 // find a corresponding bucket otherwise there's a bug in the | |
1822 // recording of dependecies. | |
1823 // | |
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1824 void InstanceKlass::remove_dependent_nmethod(nmethod* nm) { |
0 | 1825 assert_locked_or_safepoint(CodeCache_lock); |
1826 nmethodBucket* b = _dependencies; | |
1827 nmethodBucket* last = NULL; | |
1828 while (b != NULL) { | |
1829 if (nm == b->get_nmethod()) { | |
1830 if (b->decrement() == 0) { | |
1831 if (last == NULL) { | |
1832 _dependencies = b->next(); | |
1833 } else { | |
1834 last->set_next(b->next()); | |
1835 } | |
1836 delete b; | |
1837 } | |
1838 return; | |
1839 } | |
1840 last = b; | |
1841 b = b->next(); | |
1842 } | |
1843 #ifdef ASSERT | |
1844 tty->print_cr("### %s can't find dependent nmethod:", this->external_name()); | |
1845 nm->print(); | |
1846 #endif // ASSERT | |
1847 ShouldNotReachHere(); | |
1848 } | |
1849 | |
1850 | |
1851 #ifndef PRODUCT | |
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1852 void InstanceKlass::print_dependent_nmethods(bool verbose) { |
0 | 1853 nmethodBucket* b = _dependencies; |
1854 int idx = 0; | |
1855 while (b != NULL) { | |
1856 nmethod* nm = b->get_nmethod(); | |
1857 tty->print("[%d] count=%d { ", idx++, b->count()); | |
1858 if (!verbose) { | |
1859 nm->print_on(tty, "nmethod"); | |
1860 tty->print_cr(" } "); | |
1861 } else { | |
1862 nm->print(); | |
1863 nm->print_dependencies(); | |
1864 tty->print_cr("--- } "); | |
1865 } | |
1866 b = b->next(); | |
1867 } | |
1868 } | |
1869 | |
1870 | |
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1871 bool InstanceKlass::is_dependent_nmethod(nmethod* nm) { |
0 | 1872 nmethodBucket* b = _dependencies; |
1873 while (b != NULL) { | |
1874 if (nm == b->get_nmethod()) { | |
1875 return true; | |
1876 } | |
1877 b = b->next(); | |
1878 } | |
1879 return false; | |
1880 } | |
1881 #endif //PRODUCT | |
1882 | |
1883 | |
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1884 // Garbage collection |
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1885 |
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1886 void InstanceKlass::oops_do(OopClosure* cl) { |
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1887 Klass::oops_do(cl); |
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1888 |
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1889 cl->do_oop(adr_protection_domain()); |
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1890 cl->do_oop(adr_signers()); |
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1891 cl->do_oop(adr_init_lock()); |
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1892 |
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1893 // Don't walk the arrays since they are walked from the ClassLoaderData objects. |
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1894 } |
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1895 |
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1896 #ifdef ASSERT |
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1897 template <class T> void assert_is_in(T *p) { |
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1898 T heap_oop = oopDesc::load_heap_oop(p); |
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1899 if (!oopDesc::is_null(heap_oop)) { |
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1900 oop o = oopDesc::decode_heap_oop_not_null(heap_oop); |
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1901 assert(Universe::heap()->is_in(o), "should be in heap"); |
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1902 } |
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1903 } |
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1904 template <class T> void assert_is_in_closed_subset(T *p) { |
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1905 T heap_oop = oopDesc::load_heap_oop(p); |
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1906 if (!oopDesc::is_null(heap_oop)) { |
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1907 oop o = oopDesc::decode_heap_oop_not_null(heap_oop); |
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1908 assert(Universe::heap()->is_in_closed_subset(o), |
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1909 err_msg("should be in closed *p " INTPTR_FORMAT " " INTPTR_FORMAT, (address)p, (address)o)); |
113
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1910 } |
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1911 } |
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1912 template <class T> void assert_is_in_reserved(T *p) { |
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1913 T heap_oop = oopDesc::load_heap_oop(p); |
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1914 if (!oopDesc::is_null(heap_oop)) { |
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1915 oop o = oopDesc::decode_heap_oop_not_null(heap_oop); |
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1916 assert(Universe::heap()->is_in_reserved(o), "should be in reserved"); |
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1917 } |
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1918 } |
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1919 template <class T> void assert_nothing(T *p) {} |
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1920 |
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1921 #else |
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1922 template <class T> void assert_is_in(T *p) {} |
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1923 template <class T> void assert_is_in_closed_subset(T *p) {} |
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1924 template <class T> void assert_is_in_reserved(T *p) {} |
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1925 template <class T> void assert_nothing(T *p) {} |
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1926 #endif // ASSERT |
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1927 |
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1928 // |
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1929 // Macros that iterate over areas of oops which are specialized on type of |
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1930 // oop pointer either narrow or wide, depending on UseCompressedOops |
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1931 // |
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1932 // Parameters are: |
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1933 // T - type of oop to point to (either oop or narrowOop) |
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1934 // start_p - starting pointer for region to iterate over |
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1935 // count - number of oops or narrowOops to iterate over |
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1936 // do_oop - action to perform on each oop (it's arbitrary C code which |
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1937 // makes it more efficient to put in a macro rather than making |
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1938 // it a template function) |
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1939 // assert_fn - assert function which is template function because performance |
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1940 // doesn't matter when enabled. |
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1941 #define InstanceKlass_SPECIALIZED_OOP_ITERATE( \ |
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1942 T, start_p, count, do_oop, \ |
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1943 assert_fn) \ |
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1944 { \ |
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1945 T* p = (T*)(start_p); \ |
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1946 T* const end = p + (count); \ |
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1947 while (p < end) { \ |
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1948 (assert_fn)(p); \ |
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1949 do_oop; \ |
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1950 ++p; \ |
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1951 } \ |
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1952 } |
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1953 |
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1954 #define InstanceKlass_SPECIALIZED_OOP_REVERSE_ITERATE( \ |
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1955 T, start_p, count, do_oop, \ |
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1956 assert_fn) \ |
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1957 { \ |
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1958 T* const start = (T*)(start_p); \ |
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1959 T* p = start + (count); \ |
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1960 while (start < p) { \ |
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1961 --p; \ |
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1962 (assert_fn)(p); \ |
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1963 do_oop; \ |
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1964 } \ |
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1965 } |
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1966 |
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1967 #define InstanceKlass_SPECIALIZED_BOUNDED_OOP_ITERATE( \ |
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1968 T, start_p, count, low, high, \ |
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1969 do_oop, assert_fn) \ |
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1970 { \ |
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1971 T* const l = (T*)(low); \ |
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1972 T* const h = (T*)(high); \ |
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1973 assert(mask_bits((intptr_t)l, sizeof(T)-1) == 0 && \ |
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1974 mask_bits((intptr_t)h, sizeof(T)-1) == 0, \ |
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1975 "bounded region must be properly aligned"); \ |
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1976 T* p = (T*)(start_p); \ |
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1977 T* end = p + (count); \ |
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1978 if (p < l) p = l; \ |
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1979 if (end > h) end = h; \ |
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1980 while (p < end) { \ |
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1981 (assert_fn)(p); \ |
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1982 do_oop; \ |
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1983 ++p; \ |
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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 // The following macros call specialized macros, passing either oop or |
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1989 // narrowOop as the specialization type. These test the UseCompressedOops |
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1990 // flag. |
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1991 #define InstanceKlass_OOP_MAP_ITERATE(obj, do_oop, assert_fn) \ |
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1992 { \ |
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1993 /* Compute oopmap block range. The common case \ |
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1994 is nonstatic_oop_map_size == 1. */ \ |
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1995 OopMapBlock* map = start_of_nonstatic_oop_maps(); \ |
938 | 1996 OopMapBlock* const end_map = map + nonstatic_oop_map_count(); \ |
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1997 if (UseCompressedOops) { \ |
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1998 while (map < end_map) { \ |
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1999 InstanceKlass_SPECIALIZED_OOP_ITERATE(narrowOop, \ |
938 | 2000 obj->obj_field_addr<narrowOop>(map->offset()), map->count(), \ |
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2001 do_oop, assert_fn) \ |
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2002 ++map; \ |
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2003 } \ |
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2004 } else { \ |
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2005 while (map < end_map) { \ |
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2006 InstanceKlass_SPECIALIZED_OOP_ITERATE(oop, \ |
938 | 2007 obj->obj_field_addr<oop>(map->offset()), map->count(), \ |
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2008 do_oop, assert_fn) \ |
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2009 ++map; \ |
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2010 } \ |
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2011 } \ |
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2012 } |
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2013 |
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2014 #define InstanceKlass_OOP_MAP_REVERSE_ITERATE(obj, do_oop, assert_fn) \ |
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2015 { \ |
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2016 OopMapBlock* const start_map = start_of_nonstatic_oop_maps(); \ |
938 | 2017 OopMapBlock* map = start_map + nonstatic_oop_map_count(); \ |
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2018 if (UseCompressedOops) { \ |
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2019 while (start_map < map) { \ |
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2020 --map; \ |
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2021 InstanceKlass_SPECIALIZED_OOP_REVERSE_ITERATE(narrowOop, \ |
938 | 2022 obj->obj_field_addr<narrowOop>(map->offset()), map->count(), \ |
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2023 do_oop, assert_fn) \ |
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2024 } \ |
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2025 } else { \ |
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2026 while (start_map < map) { \ |
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2027 --map; \ |
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2028 InstanceKlass_SPECIALIZED_OOP_REVERSE_ITERATE(oop, \ |
938 | 2029 obj->obj_field_addr<oop>(map->offset()), map->count(), \ |
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2030 do_oop, assert_fn) \ |
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2031 } \ |
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2032 } \ |
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2033 } |
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2034 |
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2035 #define InstanceKlass_BOUNDED_OOP_MAP_ITERATE(obj, low, high, do_oop, \ |
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2036 assert_fn) \ |
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2037 { \ |
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2038 /* Compute oopmap block range. The common case is \ |
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2039 nonstatic_oop_map_size == 1, so we accept the \ |
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2040 usually non-existent extra overhead of examining \ |
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2041 all the maps. */ \ |
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2042 OopMapBlock* map = start_of_nonstatic_oop_maps(); \ |
938 | 2043 OopMapBlock* const end_map = map + nonstatic_oop_map_count(); \ |
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2044 if (UseCompressedOops) { \ |
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2045 while (map < end_map) { \ |
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2046 InstanceKlass_SPECIALIZED_BOUNDED_OOP_ITERATE(narrowOop, \ |
938 | 2047 obj->obj_field_addr<narrowOop>(map->offset()), map->count(), \ |
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2048 low, high, \ |
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2049 do_oop, assert_fn) \ |
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2050 ++map; \ |
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2051 } \ |
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2052 } else { \ |
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2053 while (map < end_map) { \ |
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2054 InstanceKlass_SPECIALIZED_BOUNDED_OOP_ITERATE(oop, \ |
938 | 2055 obj->obj_field_addr<oop>(map->offset()), map->count(), \ |
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2056 low, high, \ |
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2057 do_oop, assert_fn) \ |
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2058 ++map; \ |
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2059 } \ |
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2060 } \ |
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2061 } |
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2062 |
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2063 void InstanceKlass::oop_follow_contents(oop obj) { |
113
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2064 assert(obj != NULL, "can't follow the content of NULL object"); |
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2065 MarkSweep::follow_klass(obj->klass()); |
113
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2066 InstanceKlass_OOP_MAP_ITERATE( \ |
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2067 obj, \ |
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2068 MarkSweep::mark_and_push(p), \ |
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2069 assert_is_in_closed_subset) |
0 | 2070 } |
2071 | |
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2072 #if INCLUDE_ALL_GCS |
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2073 void InstanceKlass::oop_follow_contents(ParCompactionManager* cm, |
0 | 2074 oop obj) { |
113
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2075 assert(obj != NULL, "can't follow the content of NULL object"); |
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2076 PSParallelCompact::follow_klass(cm, obj->klass()); |
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2077 // Only mark the header and let the scan of the meta-data mark |
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2078 // everything else. |
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2079 InstanceKlass_OOP_MAP_ITERATE( \ |
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2080 obj, \ |
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2081 PSParallelCompact::mark_and_push(cm, p), \ |
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2082 assert_is_in) |
0 | 2083 } |
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2084 #endif // INCLUDE_ALL_GCS |
0 | 2085 |
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2086 // closure's do_metadata() method dictates whether the given closure should be |
0 | 2087 // applied to the klass ptr in the object header. |
2088 | |
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2089 #define if_do_metadata_checked(closure, nv_suffix) \ |
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2090 /* Make sure the non-virtual and the virtual versions match. */ \ |
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2091 assert(closure->do_metadata##nv_suffix() == closure->do_metadata(), \ |
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2092 "Inconsistency in do_metadata"); \ |
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2093 if (closure->do_metadata##nv_suffix()) |
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2094 |
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2095 #define InstanceKlass_OOP_OOP_ITERATE_DEFN(OopClosureType, nv_suffix) \ |
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2096 \ |
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2097 int InstanceKlass::oop_oop_iterate##nv_suffix(oop obj, OopClosureType* closure) { \ |
113
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2098 SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::ik);\ |
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2099 /* header */ \ |
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2100 if_do_metadata_checked(closure, nv_suffix) { \ |
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2101 closure->do_klass##nv_suffix(obj->klass()); \ |
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2102 } \ |
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2103 InstanceKlass_OOP_MAP_ITERATE( \ |
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2104 obj, \ |
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2105 SpecializationStats:: \ |
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2106 record_do_oop_call##nv_suffix(SpecializationStats::ik); \ |
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2107 (closure)->do_oop##nv_suffix(p), \ |
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2108 assert_is_in_closed_subset) \ |
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2109 return size_helper(); \ |
0 | 2110 } |
2111 | |
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2112 #if INCLUDE_ALL_GCS |
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2113 #define InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DEFN(OopClosureType, nv_suffix) \ |
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2114 \ |
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2115 int InstanceKlass::oop_oop_iterate_backwards##nv_suffix(oop obj, \ |
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2116 OopClosureType* closure) { \ |
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2117 SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::ik); \ |
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2118 /* header */ \ |
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2119 if_do_metadata_checked(closure, nv_suffix) { \ |
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2120 closure->do_klass##nv_suffix(obj->klass()); \ |
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2121 } \ |
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2122 /* instance variables */ \ |
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2123 InstanceKlass_OOP_MAP_REVERSE_ITERATE( \ |
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2124 obj, \ |
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2125 SpecializationStats::record_do_oop_call##nv_suffix(SpecializationStats::ik);\ |
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2126 (closure)->do_oop##nv_suffix(p), \ |
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2127 assert_is_in_closed_subset) \ |
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2128 return size_helper(); \ |
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2129 } |
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2130 #endif // INCLUDE_ALL_GCS |
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2131 |
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2132 #define InstanceKlass_OOP_OOP_ITERATE_DEFN_m(OopClosureType, nv_suffix) \ |
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2133 \ |
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2134 int InstanceKlass::oop_oop_iterate##nv_suffix##_m(oop obj, \ |
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2135 OopClosureType* closure, \ |
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2136 MemRegion mr) { \ |
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2137 SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::ik);\ |
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2138 if_do_metadata_checked(closure, nv_suffix) { \ |
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2139 if (mr.contains(obj)) { \ |
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2140 closure->do_klass##nv_suffix(obj->klass()); \ |
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2141 } \ |
113
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2142 } \ |
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2143 InstanceKlass_BOUNDED_OOP_MAP_ITERATE( \ |
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2144 obj, mr.start(), mr.end(), \ |
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2145 (closure)->do_oop##nv_suffix(p), \ |
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2146 assert_is_in_closed_subset) \ |
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2147 return size_helper(); \ |
0 | 2148 } |
2149 | |
2150 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_DEFN) | |
342
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2151 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_DEFN) |
0 | 2152 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_DEFN_m) |
342
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2153 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_DEFN_m) |
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2154 #if INCLUDE_ALL_GCS |
342
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2155 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DEFN) |
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2156 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DEFN) |
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2157 #endif // INCLUDE_ALL_GCS |
0 | 2158 |
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2159 int InstanceKlass::oop_adjust_pointers(oop obj) { |
0 | 2160 int size = size_helper(); |
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2161 InstanceKlass_OOP_MAP_ITERATE( \ |
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2162 obj, \ |
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2163 MarkSweep::adjust_pointer(p), \ |
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2164 assert_is_in) |
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2165 MarkSweep::adjust_klass(obj->klass()); |
0 | 2166 return size; |
2167 } | |
2168 | |
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2169 #if INCLUDE_ALL_GCS |
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2170 void InstanceKlass::oop_push_contents(PSPromotionManager* pm, oop obj) { |
113
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2171 InstanceKlass_OOP_MAP_REVERSE_ITERATE( \ |
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2172 obj, \ |
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2173 if (PSScavenge::should_scavenge(p)) { \ |
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2174 pm->claim_or_forward_depth(p); \ |
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2175 }, \ |
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2176 assert_nothing ) |
0 | 2177 } |
2178 | |
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2179 int InstanceKlass::oop_update_pointers(ParCompactionManager* cm, oop obj) { |
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2180 int size = size_helper(); |
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2181 InstanceKlass_OOP_MAP_ITERATE( \ |
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2182 obj, \ |
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2183 PSParallelCompact::adjust_pointer(p), \ |
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2184 assert_is_in) |
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2185 obj->update_header(cm); |
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2186 return size; |
0 | 2187 } |
2188 | |
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2189 #endif // INCLUDE_ALL_GCS |
0 | 2190 |
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2191 void InstanceKlass::clean_implementors_list(BoolObjectClosure* is_alive) { |
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2192 assert(is_loader_alive(is_alive), "this klass should be live"); |
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2193 if (is_interface()) { |
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2194 if (ClassUnloading) { |
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2195 Klass* impl = implementor(); |
5998
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2196 if (impl != NULL) { |
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2197 if (!impl->is_loader_alive(is_alive)) { |
5998
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2198 // remove this guy |
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2199 Klass** klass = adr_implementor(); |
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2200 assert(klass != NULL, "null klass"); |
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2201 if (klass != NULL) { |
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2202 *klass = NULL; |
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2203 } |
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2204 } |
0 | 2205 } |
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2206 } |
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2207 } |
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2208 } |
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2209 |
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2210 void InstanceKlass::clean_method_data(BoolObjectClosure* is_alive) { |
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2211 for (int m = 0; m < methods()->length(); m++) { |
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2212 MethodData* mdo = methods()->at(m)->method_data(); |
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2213 if (mdo != NULL) { |
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2214 for (ProfileData* data = mdo->first_data(); |
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2215 mdo->is_valid(data); |
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2216 data = mdo->next_data(data)) { |
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2217 data->clean_weak_klass_links(is_alive); |
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2218 } |
0 | 2219 } |
2220 } | |
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2221 } |
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2222 |
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2223 |
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2224 static void remove_unshareable_in_class(Klass* k) { |
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2225 // remove klass's unshareable info |
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2226 k->remove_unshareable_info(); |
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2227 } |
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2228 |
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2229 void InstanceKlass::remove_unshareable_info() { |
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2230 Klass::remove_unshareable_info(); |
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2231 // Unlink the class |
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2232 if (is_linked()) { |
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2233 unlink_class(); |
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2234 } |
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2235 init_implementor(); |
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2236 |
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2237 constants()->remove_unshareable_info(); |
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2238 |
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2239 for (int i = 0; i < methods()->length(); i++) { |
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2240 Method* m = methods()->at(i); |
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2241 m->remove_unshareable_info(); |
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2242 } |
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2243 |
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2244 // Need to reinstate when reading back the class. |
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2245 set_init_lock(NULL); |
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2246 |
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2247 // do array classes also. |
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2248 array_klasses_do(remove_unshareable_in_class); |
0 | 2249 } |
2250 | |
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2251 void restore_unshareable_in_class(Klass* k, TRAPS) { |
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2252 k->restore_unshareable_info(CHECK); |
0 | 2253 } |
2254 | |
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2255 void InstanceKlass::restore_unshareable_info(TRAPS) { |
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2256 Klass::restore_unshareable_info(CHECK); |
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2257 instanceKlassHandle ik(THREAD, this); |
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2258 |
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2259 Array<Method*>* methods = ik->methods(); |
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2260 int num_methods = methods->length(); |
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2261 for (int index2 = 0; index2 < num_methods; ++index2) { |
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2262 methodHandle m(THREAD, methods->at(index2)); |
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2263 m()->link_method(m, CHECK); |
6733
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2264 // restore method's vtable by calling a virtual function |
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2265 m->restore_vtable(); |
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2266 } |
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2267 if (JvmtiExport::has_redefined_a_class()) { |
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2268 // Reinitialize vtable because RedefineClasses may have changed some |
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2269 // entries in this vtable for super classes so the CDS vtable might |
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2270 // point to old or obsolete entries. RedefineClasses doesn't fix up |
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2271 // vtables in the shared system dictionary, only the main one. |
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2272 // It also redefines the itable too so fix that too. |
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2273 ResourceMark rm(THREAD); |
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2274 ik->vtable()->initialize_vtable(false, CHECK); |
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2275 ik->itable()->initialize_itable(false, CHECK); |
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2276 } |
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|
2277 |
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2278 // Allocate a simple java object for a lock. |
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2279 // This needs to be a java object because during class initialization |
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2280 // it can be held across a java call. |
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2281 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK); |
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2282 Handle h(THREAD, (oop)r); |
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2283 ik->set_init_lock(h()); |
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2284 |
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2285 // restore constant pool resolved references |
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|
2286 ik->constants()->restore_unshareable_info(CHECK); |
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|
2287 |
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|
2288 ik->array_klasses_do(restore_unshareable_in_class, CHECK); |
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|
2289 } |
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|
2290 |
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|
2291 static void clear_all_breakpoints(Method* m) { |
0 | 2292 m->clear_all_breakpoints(); |
2293 } | |
2294 | |
10149
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8011803: release_C_heap_structures is never called for anonymous classes.
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|
2295 |
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8011803: release_C_heap_structures is never called for anonymous classes.
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|
2296 void InstanceKlass::notify_unload_class(InstanceKlass* ik) { |
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|
2297 // notify the debugger |
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8011803: release_C_heap_structures is never called for anonymous classes.
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|
2298 if (JvmtiExport::should_post_class_unload()) { |
d587a5c30bd8
8011803: release_C_heap_structures is never called for anonymous classes.
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|
2299 JvmtiExport::post_class_unload(ik); |
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8011803: release_C_heap_structures is never called for anonymous classes.
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|
2300 } |
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|
2301 |
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|
2302 // notify ClassLoadingService of class unload |
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8011803: release_C_heap_structures is never called for anonymous classes.
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|
2303 ClassLoadingService::notify_class_unloaded(ik); |
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8011803: release_C_heap_structures is never called for anonymous classes.
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|
2304 } |
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|
2305 |
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|
2306 void InstanceKlass::release_C_heap_structures(InstanceKlass* ik) { |
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8011803: release_C_heap_structures is never called for anonymous classes.
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|
2307 // Clean up C heap |
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|
2308 ik->release_C_heap_structures(); |
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|
2309 ik->constants()->release_C_heap_structures(); |
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|
2310 } |
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|
2311 |
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2312 void InstanceKlass::release_C_heap_structures() { |
10149
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|
2313 |
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|
2314 // Can't release the constant pool here because the constant pool can be |
d587a5c30bd8
8011803: release_C_heap_structures is never called for anonymous classes.
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|
2315 // deallocated separately from the InstanceKlass for default methods and |
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|
2316 // redefine classes. |
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|
2317 |
0 | 2318 // Deallocate oop map cache |
2319 if (_oop_map_cache != NULL) { | |
2320 delete _oop_map_cache; | |
2321 _oop_map_cache = NULL; | |
2322 } | |
2323 | |
2324 // Deallocate JNI identifiers for jfieldIDs | |
2325 JNIid::deallocate(jni_ids()); | |
2326 set_jni_ids(NULL); | |
2327 | |
2328 jmethodID* jmeths = methods_jmethod_ids_acquire(); | |
2329 if (jmeths != (jmethodID*)NULL) { | |
2330 release_set_methods_jmethod_ids(NULL); | |
2331 FreeHeap(jmeths); | |
2332 } | |
2333 | |
10133
6337ca4dcad8
8008511: JSR 292: MemberName vmtarget refs to methods must be updated at class redefinition
sspitsyn
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diff
changeset
|
2334 MemberNameTable* mnt = member_names(); |
6337ca4dcad8
8008511: JSR 292: MemberName vmtarget refs to methods must be updated at class redefinition
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|
2335 if (mnt != NULL) { |
6337ca4dcad8
8008511: JSR 292: MemberName vmtarget refs to methods must be updated at class redefinition
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changeset
|
2336 delete mnt; |
6337ca4dcad8
8008511: JSR 292: MemberName vmtarget refs to methods must be updated at class redefinition
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diff
changeset
|
2337 set_member_names(NULL); |
6337ca4dcad8
8008511: JSR 292: MemberName vmtarget refs to methods must be updated at class redefinition
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|
2338 } |
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|
2339 |
0 | 2340 int* indices = methods_cached_itable_indices_acquire(); |
2341 if (indices != (int*)NULL) { | |
2342 release_set_methods_cached_itable_indices(NULL); | |
2343 FreeHeap(indices); | |
2344 } | |
2345 | |
2346 // release dependencies | |
2347 nmethodBucket* b = _dependencies; | |
2348 _dependencies = NULL; | |
2349 while (b != NULL) { | |
2350 nmethodBucket* next = b->next(); | |
2351 delete b; | |
2352 b = next; | |
2353 } | |
2354 | |
2355 // Deallocate breakpoint records | |
2356 if (breakpoints() != 0x0) { | |
2357 methods_do(clear_all_breakpoints); | |
2358 assert(breakpoints() == 0x0, "should have cleared breakpoints"); | |
2359 } | |
2360 | |
2361 // deallocate information about previous versions | |
2362 if (_previous_versions != NULL) { | |
2363 for (int i = _previous_versions->length() - 1; i >= 0; i--) { | |
2364 PreviousVersionNode * pv_node = _previous_versions->at(i); | |
2365 delete pv_node; | |
2366 } | |
2367 delete _previous_versions; | |
2368 _previous_versions = NULL; | |
2369 } | |
2370 | |
2371 // deallocate the cached class file | |
2372 if (_cached_class_file_bytes != NULL) { | |
6197 | 2373 os::free(_cached_class_file_bytes, mtClass); |
0 | 2374 _cached_class_file_bytes = NULL; |
2375 _cached_class_file_len = 0; | |
2376 } | |
2177
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|
2377 |
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diff
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|
2378 // Decrement symbol reference counts associated with the unloaded class. |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
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diff
changeset
|
2379 if (_name != NULL) _name->decrement_refcount(); |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
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diff
changeset
|
2380 // unreference array name derived from this class name (arrays of an unloaded |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
2381 // class can't be referenced anymore). |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
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diff
changeset
|
2382 if (_array_name != NULL) _array_name->decrement_refcount(); |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
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diff
changeset
|
2383 if (_source_file_name != NULL) _source_file_name->decrement_refcount(); |
6203
04ade88d9712
6294277: java -Xdebug crashes on SourceDebugExtension attribute larger than 64K
fparain
parents:
6197
diff
changeset
|
2384 if (_source_debug_extension != NULL) FREE_C_HEAP_ARRAY(char, _source_debug_extension, mtClass); |
7464
ecd24264898b
8005048: NMT: #loaded classes needs to just show the # defined classes
zgu
parents:
7180
diff
changeset
|
2385 |
ecd24264898b
8005048: NMT: #loaded classes needs to just show the # defined classes
zgu
parents:
7180
diff
changeset
|
2386 assert(_total_instanceKlass_count >= 1, "Sanity check"); |
ecd24264898b
8005048: NMT: #loaded classes needs to just show the # defined classes
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parents:
7180
diff
changeset
|
2387 Atomic::dec(&_total_instanceKlass_count); |
2177
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6990754: Use native memory and reference counting to implement SymbolTable
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diff
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|
2388 } |
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diff
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|
2389 |
6725
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|
2390 void InstanceKlass::set_source_file_name(Symbol* n) { |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
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diff
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|
2391 _source_file_name = n; |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
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diff
changeset
|
2392 if (_source_file_name != NULL) _source_file_name->increment_refcount(); |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
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diff
changeset
|
2393 } |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
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diff
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|
2394 |
6725
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|
2395 void InstanceKlass::set_source_debug_extension(char* array, int length) { |
6203
04ade88d9712
6294277: java -Xdebug crashes on SourceDebugExtension attribute larger than 64K
fparain
parents:
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diff
changeset
|
2396 if (array == NULL) { |
04ade88d9712
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parents:
6197
diff
changeset
|
2397 _source_debug_extension = NULL; |
04ade88d9712
6294277: java -Xdebug crashes on SourceDebugExtension attribute larger than 64K
fparain
parents:
6197
diff
changeset
|
2398 } else { |
04ade88d9712
6294277: java -Xdebug crashes on SourceDebugExtension attribute larger than 64K
fparain
parents:
6197
diff
changeset
|
2399 // Adding one to the attribute length in order to store a null terminator |
04ade88d9712
6294277: java -Xdebug crashes on SourceDebugExtension attribute larger than 64K
fparain
parents:
6197
diff
changeset
|
2400 // character could cause an overflow because the attribute length is |
04ade88d9712
6294277: java -Xdebug crashes on SourceDebugExtension attribute larger than 64K
fparain
parents:
6197
diff
changeset
|
2401 // already coded with an u4 in the classfile, but in practice, it's |
04ade88d9712
6294277: java -Xdebug crashes on SourceDebugExtension attribute larger than 64K
fparain
parents:
6197
diff
changeset
|
2402 // unlikely to happen. |
04ade88d9712
6294277: java -Xdebug crashes on SourceDebugExtension attribute larger than 64K
fparain
parents:
6197
diff
changeset
|
2403 assert((length+1) > length, "Overflow checking"); |
04ade88d9712
6294277: java -Xdebug crashes on SourceDebugExtension attribute larger than 64K
fparain
parents:
6197
diff
changeset
|
2404 char* sde = NEW_C_HEAP_ARRAY(char, (length + 1), mtClass); |
04ade88d9712
6294277: java -Xdebug crashes on SourceDebugExtension attribute larger than 64K
fparain
parents:
6197
diff
changeset
|
2405 for (int i = 0; i < length; i++) { |
04ade88d9712
6294277: java -Xdebug crashes on SourceDebugExtension attribute larger than 64K
fparain
parents:
6197
diff
changeset
|
2406 sde[i] = array[i]; |
04ade88d9712
6294277: java -Xdebug crashes on SourceDebugExtension attribute larger than 64K
fparain
parents:
6197
diff
changeset
|
2407 } |
04ade88d9712
6294277: java -Xdebug crashes on SourceDebugExtension attribute larger than 64K
fparain
parents:
6197
diff
changeset
|
2408 sde[length] = '\0'; |
04ade88d9712
6294277: java -Xdebug crashes on SourceDebugExtension attribute larger than 64K
fparain
parents:
6197
diff
changeset
|
2409 _source_debug_extension = sde; |
04ade88d9712
6294277: java -Xdebug crashes on SourceDebugExtension attribute larger than 64K
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parents:
6197
diff
changeset
|
2410 } |
0 | 2411 } |
2412 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
2413 address InstanceKlass::static_field_addr(int offset) { |
6735
aed758eda82a
7195833: NPG: Rename instanceClassLoaderKlass, instanceRefKlass and instanceMirrorKlass
coleenp
parents:
6733
diff
changeset
|
2414 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
never
parents:
2357
diff
changeset
|
2415 } |
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2357
diff
changeset
|
2416 |
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2357
diff
changeset
|
2417 |
6725
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diff
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|
2418 const char* InstanceKlass::signature_name() const { |
0 | 2419 const char* src = (const char*) (name()->as_C_string()); |
2420 const int src_length = (int)strlen(src); | |
2421 char* dest = NEW_RESOURCE_ARRAY(char, src_length + 3); | |
2422 int src_index = 0; | |
2423 int dest_index = 0; | |
2424 dest[dest_index++] = 'L'; | |
2425 while (src_index < src_length) { | |
2426 dest[dest_index++] = src[src_index++]; | |
2427 } | |
2428 dest[dest_index++] = ';'; | |
2429 dest[dest_index] = '\0'; | |
2430 return dest; | |
2431 } | |
2432 | |
2433 // different verisons of is_same_class_package | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
2434 bool InstanceKlass::is_same_class_package(Klass* class2) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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6266
diff
changeset
|
2435 Klass* class1 = this; |
da91efe96a93
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diff
changeset
|
2436 oop classloader1 = InstanceKlass::cast(class1)->class_loader(); |
6983 | 2437 Symbol* classname1 = class1->name(); |
2438 | |
2439 if (class2->oop_is_objArray()) { | |
6831
d8ce2825b193
8000213: NPG: Should have renamed arrayKlass and typeArrayKlass
coleenp
parents:
6735
diff
changeset
|
2440 class2 = ObjArrayKlass::cast(class2)->bottom_klass(); |
0 | 2441 } |
2442 oop classloader2; | |
6983 | 2443 if (class2->oop_is_instance()) { |
6725
da91efe96a93
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coleenp
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6266
diff
changeset
|
2444 classloader2 = InstanceKlass::cast(class2)->class_loader(); |
0 | 2445 } else { |
6983 | 2446 assert(class2->oop_is_typeArray(), "should be type array"); |
0 | 2447 classloader2 = NULL; |
2448 } | |
6983 | 2449 Symbol* classname2 = class2->name(); |
0 | 2450 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
2451 return InstanceKlass::is_same_class_package(classloader1, classname1, |
0 | 2452 classloader2, classname2); |
2453 } | |
2454 | |
6725
da91efe96a93
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diff
changeset
|
2455 bool InstanceKlass::is_same_class_package(oop classloader2, Symbol* classname2) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
2456 Klass* class1 = this; |
da91efe96a93
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diff
changeset
|
2457 oop classloader1 = InstanceKlass::cast(class1)->class_loader(); |
6983 | 2458 Symbol* classname1 = class1->name(); |
0 | 2459 |
6725
da91efe96a93
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diff
changeset
|
2460 return InstanceKlass::is_same_class_package(classloader1, classname1, |
0 | 2461 classloader2, classname2); |
2462 } | |
2463 | |
2464 // return true if two classes are in the same package, classloader | |
2465 // and classname information is enough to determine a class's package | |
6725
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6266
diff
changeset
|
2466 bool InstanceKlass::is_same_class_package(oop class_loader1, Symbol* class_name1, |
2177
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6990754: Use native memory and reference counting to implement SymbolTable
coleenp
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diff
changeset
|
2467 oop class_loader2, Symbol* class_name2) { |
0 | 2468 if (class_loader1 != class_loader2) { |
2469 return false; | |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2470 } else if (class_name1 == class_name2) { |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2471 return true; // skip painful bytewise comparison |
0 | 2472 } else { |
2473 ResourceMark rm; | |
2474 | |
2177
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coleenp
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1972
diff
changeset
|
2475 // The Symbol*'s are in UTF8 encoding. Since we only need to check explicitly |
0 | 2476 // for ASCII characters ('/', 'L', '['), we can keep them in UTF8 encoding. |
2477 // Otherwise, we just compare jbyte values between the strings. | |
2177
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diff
changeset
|
2478 const jbyte *name1 = class_name1->base(); |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
2479 const jbyte *name2 = class_name2->base(); |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
2480 |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
2481 const jbyte *last_slash1 = UTF8::strrchr(name1, class_name1->utf8_length(), '/'); |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
2482 const jbyte *last_slash2 = UTF8::strrchr(name2, class_name2->utf8_length(), '/'); |
0 | 2483 |
2484 if ((last_slash1 == NULL) || (last_slash2 == NULL)) { | |
2485 // One of the two doesn't have a package. Only return true | |
2486 // if the other one also doesn't have a package. | |
2487 return last_slash1 == last_slash2; | |
2488 } else { | |
2489 // Skip over '['s | |
2490 if (*name1 == '[') { | |
2491 do { | |
2492 name1++; | |
2493 } while (*name1 == '['); | |
2494 if (*name1 != 'L') { | |
2495 // Something is terribly wrong. Shouldn't be here. | |
2496 return false; | |
2497 } | |
2498 } | |
2499 if (*name2 == '[') { | |
2500 do { | |
2501 name2++; | |
2502 } while (*name2 == '['); | |
2503 if (*name2 != 'L') { | |
2504 // Something is terribly wrong. Shouldn't be here. | |
2505 return false; | |
2506 } | |
2507 } | |
2508 | |
2509 // Check that package part is identical | |
2510 int length1 = last_slash1 - name1; | |
2511 int length2 = last_slash2 - name2; | |
2512 | |
2513 return UTF8::equal(name1, length1, name2, length2); | |
2514 } | |
2515 } | |
2516 } | |
2517 | |
652
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acorn
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diff
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|
2518 // Returns true iff super_method can be overridden by a method in targetclassname |
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|
2519 // See JSL 3rd edition 8.4.6.1 |
4aaa9f5e02a8
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|
2520 // Assumes name-signature match |
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2521 // "this" is InstanceKlass of super_method which must exist |
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2522 // note that the InstanceKlass of the method in the targetclassname has not always been created yet |
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2523 bool InstanceKlass::is_override(methodHandle super_method, Handle targetclassloader, Symbol* targetclassname, TRAPS) { |
652
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|
2524 // Private methods can not be overridden |
4aaa9f5e02a8
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|
2525 if (super_method->is_private()) { |
4aaa9f5e02a8
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|
2526 return false; |
4aaa9f5e02a8
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acorn
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605
diff
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|
2527 } |
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parents:
605
diff
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|
2528 // If super method is accessible, then override |
4aaa9f5e02a8
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parents:
605
diff
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|
2529 if ((super_method->is_protected()) || |
4aaa9f5e02a8
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parents:
605
diff
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|
2530 (super_method->is_public())) { |
4aaa9f5e02a8
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parents:
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|
2531 return true; |
4aaa9f5e02a8
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acorn
parents:
605
diff
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|
2532 } |
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diff
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|
2533 // Package-private methods are not inherited outside of package |
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|
2534 assert(super_method->is_package_private(), "must be package private"); |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
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diff
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|
2535 return(is_same_class_package(targetclassloader(), targetclassname)); |
652
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|
2536 } |
0 | 2537 |
665
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6814659: separable cleanups and subroutines for 6655638
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|
2538 /* defined for now in jvm.cpp, for historical reasons *-- |
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|
2539 Klass* InstanceKlass::compute_enclosing_class_impl(instanceKlassHandle self, |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
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1972
diff
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|
2540 Symbol*& simple_name_result, TRAPS) { |
665
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diff
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|
2541 ... |
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|
2542 } |
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|
2543 */ |
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diff
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|
2544 |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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diff
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|
2545 // tell if two classes have the same enclosing class (at package level) |
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|
2546 bool InstanceKlass::is_same_package_member_impl(instanceKlassHandle class1, |
da91efe96a93
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|
2547 Klass* class2_oop, TRAPS) { |
da91efe96a93
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|
2548 if (class2_oop == class1()) return true; |
6983 | 2549 if (!class2_oop->oop_is_instance()) return false; |
665
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6814659: separable cleanups and subroutines for 6655638
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|
2550 instanceKlassHandle class2(THREAD, class2_oop); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
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diff
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|
2551 |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
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|
2552 // must be in same package before we try anything else |
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jrose
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diff
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|
2553 if (!class1->is_same_class_package(class2->class_loader(), class2->name())) |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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|
2554 return false; |
c89f86385056
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605
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|
2555 |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
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|
2556 // As long as there is an outer1.getEnclosingClass, |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
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|
2557 // shift the search outward. |
c89f86385056
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jrose
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605
diff
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|
2558 instanceKlassHandle outer1 = class1; |
c89f86385056
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jrose
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605
diff
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|
2559 for (;;) { |
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6814659: separable cleanups and subroutines for 6655638
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diff
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|
2560 // As we walk along, look for equalities between outer1 and class2. |
c89f86385056
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605
diff
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|
2561 // Eventually, the walks will terminate as outer1 stops |
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jrose
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605
diff
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|
2562 // 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
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diff
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|
2563 bool ignore_inner_is_member; |
6725
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|
2564 Klass* next = outer1->compute_enclosing_class(&ignore_inner_is_member, |
1126
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diff
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|
2565 CHECK_false); |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
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605
diff
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|
2566 if (next == NULL) break; |
c89f86385056
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diff
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|
2567 if (next == class2()) return true; |
c89f86385056
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|
2568 outer1 = instanceKlassHandle(THREAD, next); |
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jrose
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|
2569 } |
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diff
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|
2570 |
c89f86385056
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jrose
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diff
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|
2571 // Now do the same for class2. |
c89f86385056
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jrose
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diff
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|
2572 instanceKlassHandle outer2 = class2; |
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605
diff
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|
2573 for (;;) { |
1126
933a3e806ce6
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xlu
parents:
1039
diff
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|
2574 bool ignore_inner_is_member; |
6725
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|
2575 Klass* next = outer2->compute_enclosing_class(&ignore_inner_is_member, |
1126
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xlu
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1039
diff
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|
2576 CHECK_false); |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
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605
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|
2577 if (next == NULL) break; |
c89f86385056
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jrose
parents:
605
diff
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|
2578 // Might as well check the new outer against all available values. |
c89f86385056
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jrose
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605
diff
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|
2579 if (next == class1()) return true; |
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jrose
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605
diff
changeset
|
2580 if (next == outer1()) return true; |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
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|
2581 outer2 = instanceKlassHandle(THREAD, next); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
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|
2582 } |
c89f86385056
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jrose
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605
diff
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|
2583 |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
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|
2584 // If by this point we have not found an equality between the |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
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|
2585 // two classes, we know they are in separate package members. |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
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|
2586 return false; |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2587 } |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
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|
2588 |
0 | 2589 |
6725
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|
2590 jint InstanceKlass::compute_modifier_flags(TRAPS) const { |
0 | 2591 jint access = access_flags().as_int(); |
2592 | |
2593 // But check if it happens to be member class. | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
2594 instanceKlassHandle ik(THREAD, this); |
5967
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
diff
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|
2595 InnerClassesIterator iter(ik); |
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
diff
changeset
|
2596 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
|
2597 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
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|
2598 // 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
|
2599 // 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
|
2600 if (ioff == 0) continue; |
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
diff
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|
2601 |
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
diff
changeset
|
2602 // 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
|
2603 // 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
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|
2604 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
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|
2605 if ((ik->name() == inner_name)) { |
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
diff
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|
2606 // 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
|
2607 access = iter.inner_access_flags(); |
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
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4739
diff
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|
2608 break; |
0 | 2609 } |
2610 } | |
2611 // Remember to strip ACC_SUPER bit | |
2612 return (access & (~JVM_ACC_SUPER)) & JVM_ACC_WRITTEN_FLAGS; | |
2613 } | |
2614 | |
6725
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|
2615 jint InstanceKlass::jvmti_class_status() const { |
0 | 2616 jint result = 0; |
2617 | |
2618 if (is_linked()) { | |
2619 result |= JVMTI_CLASS_STATUS_VERIFIED | JVMTI_CLASS_STATUS_PREPARED; | |
2620 } | |
2621 | |
2622 if (is_initialized()) { | |
2623 assert(is_linked(), "Class status is not consistent"); | |
2624 result |= JVMTI_CLASS_STATUS_INITIALIZED; | |
2625 } | |
2626 if (is_in_error_state()) { | |
2627 result |= JVMTI_CLASS_STATUS_ERROR; | |
2628 } | |
2629 return result; | |
2630 } | |
2631 | |
6725
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|
2632 Method* InstanceKlass::method_at_itable(Klass* holder, int index, TRAPS) { |
0 | 2633 itableOffsetEntry* ioe = (itableOffsetEntry*)start_of_itable(); |
2634 int method_table_offset_in_words = ioe->offset()/wordSize; | |
2635 int nof_interfaces = (method_table_offset_in_words - itable_offset_in_words()) | |
2636 / itableOffsetEntry::size(); | |
2637 | |
2638 for (int cnt = 0 ; ; cnt ++, ioe ++) { | |
605 | 2639 // If the interface isn't implemented by the receiver class, |
0 | 2640 // the VM should throw IncompatibleClassChangeError. |
2641 if (cnt >= nof_interfaces) { | |
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|
2642 THROW_NULL(vmSymbols::java_lang_IncompatibleClassChangeError()); |
0 | 2643 } |
2644 | |
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|
2645 Klass* ik = ioe->interface_klass(); |
0 | 2646 if (ik == holder) break; |
2647 } | |
2648 | |
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|
2649 itableMethodEntry* ime = ioe->first_method_entry(this); |
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|
2650 Method* m = ime[index].method(); |
0 | 2651 if (m == NULL) { |
6725
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|
2652 THROW_NULL(vmSymbols::java_lang_AbstractMethodError()); |
0 | 2653 } |
2654 return m; | |
2655 } | |
2656 | |
2657 // On-stack replacement stuff | |
6725
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coleenp
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|
2658 void InstanceKlass::add_osr_nmethod(nmethod* n) { |
0 | 2659 // only one compilation can be active |
2660 NEEDS_CLEANUP | |
2661 // This is a short non-blocking critical region, so the no safepoint check is ok. | |
2662 OsrList_lock->lock_without_safepoint_check(); | |
2663 assert(n->is_osr_method(), "wrong kind of nmethod"); | |
989
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6863023: need non-perm oops in code cache for JSR 292
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|
2664 n->set_osr_link(osr_nmethods_head()); |
0 | 2665 set_osr_nmethods_head(n); |
1783 | 2666 // Raise the highest osr level if necessary |
2667 if (TieredCompilation) { | |
6725
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|
2668 Method* m = n->method(); |
1783 | 2669 m->set_highest_osr_comp_level(MAX2(m->highest_osr_comp_level(), n->comp_level())); |
2670 } | |
0 | 2671 // Remember to unlock again |
2672 OsrList_lock->unlock(); | |
1783 | 2673 |
2674 // Get rid of the osr methods for the same bci that have lower levels. | |
2675 if (TieredCompilation) { | |
2676 for (int l = CompLevel_limited_profile; l < n->comp_level(); l++) { | |
2677 nmethod *inv = lookup_osr_nmethod(n->method(), n->osr_entry_bci(), l, true); | |
2678 if (inv != NULL && inv->is_in_use()) { | |
2679 inv->make_not_entrant(); | |
2680 } | |
2681 } | |
2682 } | |
0 | 2683 } |
2684 | |
2685 | |
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|
2686 void InstanceKlass::remove_osr_nmethod(nmethod* n) { |
0 | 2687 // This is a short non-blocking critical region, so the no safepoint check is ok. |
2688 OsrList_lock->lock_without_safepoint_check(); | |
2689 assert(n->is_osr_method(), "wrong kind of nmethod"); | |
2690 nmethod* last = NULL; | |
2691 nmethod* cur = osr_nmethods_head(); | |
1783 | 2692 int max_level = CompLevel_none; // Find the max comp level excluding n |
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|
2693 Method* m = n->method(); |
0 | 2694 // Search for match |
2695 while(cur != NULL && cur != n) { | |
1783 | 2696 if (TieredCompilation) { |
2697 // Find max level before n | |
2698 max_level = MAX2(max_level, cur->comp_level()); | |
2699 } | |
0 | 2700 last = cur; |
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2701 cur = cur->osr_link(); |
0 | 2702 } |
1783 | 2703 nmethod* next = NULL; |
0 | 2704 if (cur == n) { |
1783 | 2705 next = cur->osr_link(); |
0 | 2706 if (last == NULL) { |
2707 // Remove first element | |
1783 | 2708 set_osr_nmethods_head(next); |
0 | 2709 } else { |
1783 | 2710 last->set_osr_link(next); |
0 | 2711 } |
2712 } | |
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2713 n->set_osr_link(NULL); |
1783 | 2714 if (TieredCompilation) { |
2715 cur = next; | |
2716 while (cur != NULL) { | |
2717 // Find max level after n | |
2718 max_level = MAX2(max_level, cur->comp_level()); | |
2719 cur = cur->osr_link(); | |
2720 } | |
2721 m->set_highest_osr_comp_level(max_level); | |
2722 } | |
0 | 2723 // Remember to unlock again |
2724 OsrList_lock->unlock(); | |
2725 } | |
2726 | |
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2727 nmethod* InstanceKlass::lookup_osr_nmethod(const Method* m, int bci, int comp_level, bool match_level) const { |
0 | 2728 // This is a short non-blocking critical region, so the no safepoint check is ok. |
2729 OsrList_lock->lock_without_safepoint_check(); | |
2730 nmethod* osr = osr_nmethods_head(); | |
1783 | 2731 nmethod* best = NULL; |
0 | 2732 while (osr != NULL) { |
2733 assert(osr->is_osr_method(), "wrong kind of nmethod found in chain"); | |
1783 | 2734 // There can be a time when a c1 osr method exists but we are waiting |
2735 // for a c2 version. When c2 completes its osr nmethod we will trash | |
2736 // the c1 version and only be able to find the c2 version. However | |
2737 // while we overflow in the c1 code at back branches we don't want to | |
2738 // try and switch to the same code as we are already running | |
2739 | |
0 | 2740 if (osr->method() == m && |
2741 (bci == InvocationEntryBci || osr->osr_entry_bci() == bci)) { | |
1783 | 2742 if (match_level) { |
2743 if (osr->comp_level() == comp_level) { | |
2744 // Found a match - return it. | |
2745 OsrList_lock->unlock(); | |
2746 return osr; | |
2747 } | |
2748 } else { | |
2749 if (best == NULL || (osr->comp_level() > best->comp_level())) { | |
2750 if (osr->comp_level() == CompLevel_highest_tier) { | |
2751 // Found the best possible - return it. | |
2752 OsrList_lock->unlock(); | |
2753 return osr; | |
2754 } | |
2755 best = osr; | |
2756 } | |
2757 } | |
0 | 2758 } |
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2759 osr = osr->osr_link(); |
0 | 2760 } |
2761 OsrList_lock->unlock(); | |
1783 | 2762 if (best != NULL && best->comp_level() >= comp_level && match_level == false) { |
2763 return best; | |
2764 } | |
0 | 2765 return NULL; |
2766 } | |
2767 | |
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2768 void InstanceKlass::add_member_name(Handle mem_name) { |
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2769 jweak mem_name_wref = JNIHandles::make_weak_global(mem_name); |
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2770 MutexLocker ml(MemberNameTable_lock); |
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2771 DEBUG_ONLY(No_Safepoint_Verifier nsv); |
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2772 |
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2773 if (_member_names == NULL) { |
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2774 _member_names = new (ResourceObj::C_HEAP, mtClass) MemberNameTable(); |
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2775 } |
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2776 _member_names->add_member_name(mem_name_wref); |
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2777 } |
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2778 |
0 | 2779 // ----------------------------------------------------------------------------------------------------- |
6725
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2780 // Printing |
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2781 |
0 | 2782 #ifndef PRODUCT |
2783 | |
665
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2784 #define BULLET " - " |
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2785 |
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2786 static const char* state_names[] = { |
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2787 "allocated", "loaded", "linked", "being_initialized", "fully_initialized", "initialization_error" |
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2788 }; |
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2789 |
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2790 void InstanceKlass::print_on(outputStream* st) const { |
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2791 assert(is_klass(), "must be klass"); |
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2792 Klass::print_on(st); |
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2793 |
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2794 st->print(BULLET"instance size: %d", size_helper()); st->cr(); |
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2795 st->print(BULLET"klass size: %d", size()); st->cr(); |
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2796 st->print(BULLET"access: "); access_flags().print_on(st); st->cr(); |
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2797 st->print(BULLET"state: "); st->print_cr(state_names[_init_state]); |
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2798 st->print(BULLET"name: "); name()->print_value_on(st); st->cr(); |
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2799 st->print(BULLET"super: "); super()->print_value_on_maybe_null(st); st->cr(); |
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2800 st->print(BULLET"sub: "); |
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2801 Klass* sub = subklass(); |
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2802 int n; |
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2803 for (n = 0; sub != NULL; n++, sub = sub->next_sibling()) { |
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2804 if (n < MaxSubklassPrintSize) { |
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2805 sub->print_value_on(st); |
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2806 st->print(" "); |
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2807 } |
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2808 } |
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2809 if (n >= MaxSubklassPrintSize) st->print("(%d more klasses...)", n - MaxSubklassPrintSize); |
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2810 st->cr(); |
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2811 |
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2812 if (is_interface()) { |
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2813 st->print_cr(BULLET"nof implementors: %d", nof_implementors()); |
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2814 if (nof_implementors() == 1) { |
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2815 st->print_cr(BULLET"implementor: "); |
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2816 st->print(" "); |
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2817 implementor()->print_value_on(st); |
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2818 st->cr(); |
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2819 } |
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|
2820 } |
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|
2821 |
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2822 st->print(BULLET"arrays: "); array_klasses()->print_value_on_maybe_null(st); st->cr(); |
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2823 st->print(BULLET"methods: "); methods()->print_value_on(st); st->cr(); |
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2824 if (Verbose) { |
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2825 Array<Method*>* method_array = methods(); |
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2826 for(int i = 0; i < method_array->length(); i++) { |
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2827 st->print("%d : ", i); method_array->at(i)->print_value(); st->cr(); |
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2828 } |
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2829 } |
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2830 st->print(BULLET"method ordering: "); method_ordering()->print_value_on(st); st->cr(); |
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2831 st->print(BULLET"local interfaces: "); local_interfaces()->print_value_on(st); st->cr(); |
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2832 st->print(BULLET"trans. interfaces: "); transitive_interfaces()->print_value_on(st); st->cr(); |
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2833 st->print(BULLET"constants: "); constants()->print_value_on(st); st->cr(); |
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2834 if (class_loader_data() != NULL) { |
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2835 st->print(BULLET"class loader data: "); |
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2836 class_loader_data()->print_value_on(st); |
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2837 st->cr(); |
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2838 } |
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2839 st->print(BULLET"protection domain: "); ((InstanceKlass*)this)->protection_domain()->print_value_on(st); st->cr(); |
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2840 st->print(BULLET"host class: "); host_klass()->print_value_on_maybe_null(st); st->cr(); |
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2841 st->print(BULLET"signers: "); signers()->print_value_on(st); st->cr(); |
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2842 st->print(BULLET"init_lock: "); ((oop)_init_lock)->print_value_on(st); st->cr(); |
6725
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2843 if (source_file_name() != NULL) { |
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2844 st->print(BULLET"source file: "); |
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2845 source_file_name()->print_value_on(st); |
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2846 st->cr(); |
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2847 } |
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2848 if (source_debug_extension() != NULL) { |
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2849 st->print(BULLET"source debug extension: "); |
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2850 st->print("%s", source_debug_extension()); |
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2851 st->cr(); |
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2852 } |
8031 | 2853 st->print(BULLET"class annotations: "); class_annotations()->print_value_on(st); st->cr(); |
2854 st->print(BULLET"class type annotations: "); class_type_annotations()->print_value_on(st); st->cr(); | |
2855 st->print(BULLET"field annotations: "); fields_annotations()->print_value_on(st); st->cr(); | |
2856 st->print(BULLET"field type annotations: "); fields_type_annotations()->print_value_on(st); st->cr(); | |
6725
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2857 { |
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2858 ResourceMark rm; |
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2859 // PreviousVersionInfo objects returned via PreviousVersionWalker |
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2860 // contain a GrowableArray of handles. We have to clean up the |
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2861 // GrowableArray _after_ the PreviousVersionWalker destructor |
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2862 // has destroyed the handles. |
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2863 { |
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2864 bool have_pv = false; |
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2865 PreviousVersionWalker pvw((InstanceKlass*)this); |
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2866 for (PreviousVersionInfo * pv_info = pvw.next_previous_version(); |
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2867 pv_info != NULL; pv_info = pvw.next_previous_version()) { |
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2868 if (!have_pv) |
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2869 st->print(BULLET"previous version: "); |
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2870 have_pv = true; |
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|
2871 pv_info->prev_constant_pool_handle()()->print_value_on(st); |
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6964458: Reimplement class meta-data storage to use native memory
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|
2872 } |
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6964458: Reimplement class meta-data storage to use native memory
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|
2873 if (have_pv) st->cr(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
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|
2874 } // pvw is cleaned up |
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6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
2875 } // rm is cleaned up |
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6964458: Reimplement class meta-data storage to use native memory
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diff
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|
2876 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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changeset
|
2877 if (generic_signature() != NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
2878 st->print(BULLET"generic signature: "); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
2879 generic_signature()->print_value_on(st); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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|
2880 st->cr(); |
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6964458: Reimplement class meta-data storage to use native memory
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diff
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|
2881 } |
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6964458: Reimplement class meta-data storage to use native memory
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changeset
|
2882 st->print(BULLET"inner classes: "); inner_classes()->print_value_on(st); st->cr(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
2883 st->print(BULLET"java mirror: "); java_mirror()->print_value_on(st); st->cr(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
2884 st->print(BULLET"vtable length %d (start addr: " INTPTR_FORMAT ")", vtable_length(), start_of_vtable()); st->cr(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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changeset
|
2885 st->print(BULLET"itable length %d (start addr: " INTPTR_FORMAT ")", itable_length(), start_of_itable()); st->cr(); |
da91efe96a93
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|
2886 st->print_cr(BULLET"---- static fields (%d words):", static_field_size()); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
2887 FieldPrinter print_static_field(st); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
2888 ((InstanceKlass*)this)->do_local_static_fields(&print_static_field); |
da91efe96a93
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|
2889 st->print_cr(BULLET"---- non-static fields (%d words):", nonstatic_field_size()); |
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|
2890 FieldPrinter print_nonstatic_field(st); |
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6964458: Reimplement class meta-data storage to use native memory
coleenp
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|
2891 ((InstanceKlass*)this)->do_nonstatic_fields(&print_nonstatic_field); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
2892 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
2893 st->print(BULLET"non-static oop maps: "); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
2894 OopMapBlock* map = start_of_nonstatic_oop_maps(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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changeset
|
2895 OopMapBlock* end_map = map + nonstatic_oop_map_count(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
2896 while (map < end_map) { |
da91efe96a93
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changeset
|
2897 st->print("%d-%d ", map->offset(), map->offset() + heapOopSize*(map->count() - 1)); |
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6964458: Reimplement class meta-data storage to use native memory
coleenp
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changeset
|
2898 map++; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
2899 } |
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changeset
|
2900 st->cr(); |
da91efe96a93
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diff
changeset
|
2901 } |
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|
2902 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
2903 #endif //PRODUCT |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
2904 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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changeset
|
2905 void InstanceKlass::print_value_on(outputStream* st) const { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
2906 assert(is_klass(), "must be klass"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
2907 name()->print_value_on(st); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
2908 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
2909 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
2910 #ifndef PRODUCT |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
2911 |
0 | 2912 void FieldPrinter::do_field(fieldDescriptor* fd) { |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2913 _st->print(BULLET); |
2376
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
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diff
changeset
|
2914 if (_obj == NULL) { |
0 | 2915 fd->print_on(_st); |
2916 _st->cr(); | |
2917 } else { | |
2918 fd->print_on_for(_st, _obj); | |
2919 _st->cr(); | |
2920 } | |
2921 } | |
2922 | |
2923 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
2924 void InstanceKlass::oop_print_on(oop obj, outputStream* st) { |
0 | 2925 Klass::oop_print_on(obj, st); |
2926 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
2927 if (this == SystemDictionary::String_klass()) { |
0 | 2928 typeArrayOop value = java_lang_String::value(obj); |
2929 juint offset = java_lang_String::offset(obj); | |
2930 juint length = java_lang_String::length(obj); | |
2931 if (value != NULL && | |
2932 value->is_typeArray() && | |
2933 offset <= (juint) value->length() && | |
2934 offset + length <= (juint) value->length()) { | |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2935 st->print(BULLET"string: "); |
0 | 2936 Handle h_obj(obj); |
2937 java_lang_String::print(h_obj, st); | |
2938 st->cr(); | |
2939 if (!WizardMode) return; // that is enough | |
2940 } | |
2941 } | |
2942 | |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2943 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
|
2944 FieldPrinter print_field(st, obj); |
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2357
diff
changeset
|
2945 do_nonstatic_fields(&print_field); |
0 | 2946 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
2947 if (this == SystemDictionary::Class_klass()) { |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2948 st->print(BULLET"signature: "); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2949 java_lang_Class::print_signature(obj, st); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2950 st->cr(); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
2951 Klass* mirrored_klass = java_lang_Class::as_Klass(obj); |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2952 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
|
2953 mirrored_klass->print_value_on_maybe_null(st); |
0 | 2954 st->cr(); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
2955 Klass* array_klass = java_lang_Class::array_klass(obj); |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2956 st->print(BULLET"fake entry for array: "); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2957 array_klass->print_value_on_maybe_null(st); |
0 | 2958 st->cr(); |
2376
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2357
diff
changeset
|
2959 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
|
2960 st->print_cr(BULLET"fake entry for static_oop_field_count: %d", java_lang_Class::static_oop_field_count(obj)); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2961 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
|
2962 if (real_klass != NULL && real_klass->oop_is_instance()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2963 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
|
2964 } |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2965 } else if (this == SystemDictionary::MethodType_klass()) { |
1039
987e948ebbc8
6815692: method handle code needs some cleanup (post-6655638)
jrose
parents:
997
diff
changeset
|
2966 st->print(BULLET"signature: "); |
2357
8033953d67ff
7012648: move JSR 292 to package java.lang.invoke and adjust names
jrose
parents:
2334
diff
changeset
|
2967 java_lang_invoke_MethodType::print_signature(obj, st); |
1039
987e948ebbc8
6815692: method handle code needs some cleanup (post-6655638)
jrose
parents:
997
diff
changeset
|
2968 st->cr(); |
0 | 2969 } |
2970 } | |
2971 | |
1155
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1144
diff
changeset
|
2972 #endif //PRODUCT |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1144
diff
changeset
|
2973 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2974 void InstanceKlass::oop_print_value_on(oop obj, outputStream* st) { |
0 | 2975 st->print("a "); |
2976 name()->print_value_on(st); | |
2977 obj->print_address_on(st); | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2978 if (this == SystemDictionary::String_klass() |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2979 && java_lang_String::value(obj) != NULL) { |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2980 ResourceMark rm; |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2981 int len = java_lang_String::length(obj); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2982 int plen = (len < 24 ? len : 12); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2983 char* str = java_lang_String::as_utf8_string(obj, 0, plen); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2984 st->print(" = \"%s\"", str); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2985 if (len > plen) |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2986 st->print("...[%d]", len); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2987 } else if (this == SystemDictionary::Class_klass()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2988 Klass* k = java_lang_Class::as_Klass(obj); |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2989 st->print(" = "); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2990 if (k != NULL) { |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2991 k->print_value_on(st); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2992 } else { |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2993 const char* tname = type2name(java_lang_Class::primitive_type(obj)); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2994 st->print("%s", tname ? tname : "type?"); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2995 } |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
2996 } else if (this == SystemDictionary::MethodType_klass()) { |
1039
987e948ebbc8
6815692: method handle code needs some cleanup (post-6655638)
jrose
parents:
997
diff
changeset
|
2997 st->print(" = "); |
2357
8033953d67ff
7012648: move JSR 292 to package java.lang.invoke and adjust names
jrose
parents:
2334
diff
changeset
|
2998 java_lang_invoke_MethodType::print_signature(obj, st); |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2999 } else if (java_lang_boxing_object::is_instance(obj)) { |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
3000 st->print(" = "); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
3001 java_lang_boxing_object::print(obj, st); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
3002 } else if (this == SystemDictionary::LambdaForm_klass()) { |
6266
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
3003 oop vmentry = java_lang_invoke_LambdaForm::vmentry(obj); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
3004 if (vmentry != NULL) { |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
3005 st->print(" => "); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
3006 vmentry->print_value_on(st); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
3007 } |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
3008 } else if (this == SystemDictionary::MemberName_klass()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
3009 Metadata* vmtarget = java_lang_invoke_MemberName::vmtarget(obj); |
6266
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
3010 if (vmtarget != NULL) { |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
3011 st->print(" = "); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
3012 vmtarget->print_value_on(st); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
3013 } else { |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
3014 java_lang_invoke_MemberName::clazz(obj)->print_value_on(st); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
3015 st->print("."); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
3016 java_lang_invoke_MemberName::name(obj)->print_value_on(st); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
3017 } |
665
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3018 } |
0 | 3019 } |
3020 | |
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3021 const char* InstanceKlass::internal_name() const { |
0 | 3022 return external_name(); |
3023 } | |
3024 | |
7956 | 3025 #if INCLUDE_SERVICES |
3026 // Size Statistics | |
3027 void InstanceKlass::collect_statistics(KlassSizeStats *sz) const { | |
3028 Klass::collect_statistics(sz); | |
3029 | |
3030 sz->_inst_size = HeapWordSize * size_helper(); | |
3031 sz->_vtab_bytes = HeapWordSize * align_object_offset(vtable_length()); | |
3032 sz->_itab_bytes = HeapWordSize * align_object_offset(itable_length()); | |
3033 sz->_nonstatic_oopmap_bytes = HeapWordSize * | |
3034 ((is_interface() || is_anonymous()) ? | |
3035 align_object_offset(nonstatic_oop_map_size()) : | |
3036 nonstatic_oop_map_size()); | |
3037 | |
3038 int n = 0; | |
3039 n += (sz->_methods_array_bytes = sz->count_array(methods())); | |
3040 n += (sz->_method_ordering_bytes = sz->count_array(method_ordering())); | |
3041 n += (sz->_local_interfaces_bytes = sz->count_array(local_interfaces())); | |
3042 n += (sz->_transitive_interfaces_bytes = sz->count_array(transitive_interfaces())); | |
3043 n += (sz->_signers_bytes = sz->count_array(signers())); | |
3044 n += (sz->_fields_bytes = sz->count_array(fields())); | |
3045 n += (sz->_inner_classes_bytes = sz->count_array(inner_classes())); | |
3046 sz->_ro_bytes += n; | |
3047 | |
3048 const ConstantPool* cp = constants(); | |
3049 if (cp) { | |
3050 cp->collect_statistics(sz); | |
3051 } | |
3052 | |
3053 const Annotations* anno = annotations(); | |
3054 if (anno) { | |
3055 anno->collect_statistics(sz); | |
3056 } | |
3057 | |
3058 const Array<Method*>* methods_array = methods(); | |
3059 if (methods()) { | |
3060 for (int i = 0; i < methods_array->length(); i++) { | |
3061 Method* method = methods_array->at(i); | |
3062 if (method) { | |
3063 sz->_method_count ++; | |
3064 method->collect_statistics(sz); | |
3065 } | |
3066 } | |
3067 } | |
3068 } | |
3069 #endif // INCLUDE_SERVICES | |
3070 | |
0 | 3071 // Verification |
3072 | |
3073 class VerifyFieldClosure: public OopClosure { | |
113
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3074 protected: |
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3075 template <class T> void do_oop_work(T* p) { |
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3076 oop obj = oopDesc::load_decode_heap_oop(p); |
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3077 if (!obj->is_oop_or_null()) { |
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3078 tty->print_cr("Failed: " PTR_FORMAT " -> " PTR_FORMAT, p, (address)obj); |
0 | 3079 Universe::print(); |
3080 guarantee(false, "boom"); | |
3081 } | |
3082 } | |
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3083 public: |
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3084 virtual void do_oop(oop* p) { VerifyFieldClosure::do_oop_work(p); } |
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3085 virtual void do_oop(narrowOop* p) { VerifyFieldClosure::do_oop_work(p); } |
0 | 3086 }; |
3087 | |
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3088 void InstanceKlass::verify_on(outputStream* st) { |
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3089 Klass::verify_on(st); |
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3090 Thread *thread = Thread::current(); |
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3091 |
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3092 #ifndef PRODUCT |
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3093 // Avoid redundant verifies |
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3094 if (_verify_count == Universe::verify_count()) return; |
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3095 _verify_count = Universe::verify_count(); |
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3096 #endif |
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3097 // Verify that klass is present in SystemDictionary |
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3098 if (is_loaded() && !is_anonymous()) { |
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3099 Symbol* h_name = name(); |
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3100 SystemDictionary::verify_obj_klass_present(h_name, class_loader_data()); |
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3101 } |
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3102 |
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3103 // Verify static fields |
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3104 VerifyFieldClosure blk; |
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3105 |
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3106 // Verify vtables |
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3107 if (is_linked()) { |
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3108 ResourceMark rm(thread); |
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3109 // $$$ This used to be done only for m/s collections. Doing it |
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3110 // always seemed a valid generalization. (DLD -- 6/00) |
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3111 vtable()->verify(st); |
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3112 } |
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3113 |
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3114 // Verify first subklass |
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3115 if (subklass_oop() != NULL) { |
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3116 guarantee(subklass_oop()->is_metadata(), "should be in metaspace"); |
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3117 guarantee(subklass_oop()->is_klass(), "should be klass"); |
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3118 } |
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3119 |
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3120 // Verify siblings |
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3121 Klass* super = this->super(); |
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3122 Klass* sib = next_sibling(); |
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3123 if (sib != NULL) { |
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3124 if (sib == this) { |
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3125 fatal(err_msg("subclass points to itself " PTR_FORMAT, sib)); |
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3126 } |
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3127 |
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3128 guarantee(sib->is_metadata(), "should be in metaspace"); |
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3129 guarantee(sib->is_klass(), "should be klass"); |
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3130 guarantee(sib->super() == super, "siblings should have same superklass"); |
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3131 } |
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3132 |
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3133 // Verify implementor fields |
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3134 Klass* im = implementor(); |
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3135 if (im != NULL) { |
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3136 guarantee(is_interface(), "only interfaces should have implementor set"); |
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3137 guarantee(im->is_klass(), "should be klass"); |
6983 | 3138 guarantee(!im->is_interface() || im == this, |
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3139 "implementors cannot be interfaces"); |
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3140 } |
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3141 |
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3142 // Verify local interfaces |
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3143 if (local_interfaces()) { |
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3144 Array<Klass*>* local_interfaces = this->local_interfaces(); |
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3145 for (int j = 0; j < local_interfaces->length(); j++) { |
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3146 Klass* e = local_interfaces->at(j); |
6983 | 3147 guarantee(e->is_klass() && e->is_interface(), "invalid local interface"); |
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3148 } |
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3149 } |
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3150 |
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3151 // Verify transitive interfaces |
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3152 if (transitive_interfaces() != NULL) { |
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3153 Array<Klass*>* transitive_interfaces = this->transitive_interfaces(); |
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3154 for (int j = 0; j < transitive_interfaces->length(); j++) { |
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3155 Klass* e = transitive_interfaces->at(j); |
6983 | 3156 guarantee(e->is_klass() && e->is_interface(), "invalid transitive interface"); |
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3157 } |
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3158 } |
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3159 |
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3160 // Verify methods |
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3161 if (methods() != NULL) { |
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3162 Array<Method*>* methods = this->methods(); |
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3163 for (int j = 0; j < methods->length(); j++) { |
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3164 guarantee(methods->at(j)->is_metadata(), "should be in metaspace"); |
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3165 guarantee(methods->at(j)->is_method(), "non-method in methods array"); |
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3166 } |
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3167 for (int j = 0; j < methods->length() - 1; j++) { |
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3168 Method* m1 = methods->at(j); |
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3169 Method* m2 = methods->at(j + 1); |
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3170 guarantee(m1->name()->fast_compare(m2->name()) <= 0, "methods not sorted correctly"); |
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3171 } |
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3172 } |
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3173 |
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3174 // Verify method ordering |
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3175 if (method_ordering() != NULL) { |
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3176 Array<int>* method_ordering = this->method_ordering(); |
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3177 int length = method_ordering->length(); |
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3178 if (JvmtiExport::can_maintain_original_method_order() || |
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3179 ((UseSharedSpaces || DumpSharedSpaces) && length != 0)) { |
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3180 guarantee(length == methods()->length(), "invalid method ordering length"); |
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3181 jlong sum = 0; |
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3182 for (int j = 0; j < length; j++) { |
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3183 int original_index = method_ordering->at(j); |
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3184 guarantee(original_index >= 0, "invalid method ordering index"); |
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3185 guarantee(original_index < length, "invalid method ordering index"); |
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3186 sum += original_index; |
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3187 } |
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3188 // Verify sum of indices 0,1,...,length-1 |
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3189 guarantee(sum == ((jlong)length*(length-1))/2, "invalid method ordering sum"); |
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3190 } else { |
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3191 guarantee(length == 0, "invalid method ordering length"); |
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3192 } |
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3193 } |
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3194 |
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3195 // Verify JNI static field identifiers |
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3196 if (jni_ids() != NULL) { |
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3197 jni_ids()->verify(this); |
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3198 } |
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3199 |
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3200 // Verify other fields |
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3201 if (array_klasses() != NULL) { |
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3202 guarantee(array_klasses()->is_metadata(), "should be in metaspace"); |
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3203 guarantee(array_klasses()->is_klass(), "should be klass"); |
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3204 } |
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3205 if (constants() != NULL) { |
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3206 guarantee(constants()->is_metadata(), "should be in metaspace"); |
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3207 guarantee(constants()->is_constantPool(), "should be constant pool"); |
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3208 } |
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3209 if (protection_domain() != NULL) { |
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3210 guarantee(protection_domain()->is_oop(), "should be oop"); |
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3211 } |
8693
872b3feace55
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3212 const Klass* host = host_klass(); |
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3213 if (host != NULL) { |
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3214 guarantee(host->is_metadata(), "should be in metaspace"); |
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3215 guarantee(host->is_klass(), "should be klass"); |
6725
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3216 } |
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3217 if (signers() != NULL) { |
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3218 guarantee(signers()->is_objArray(), "should be obj array"); |
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3219 } |
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3220 } |
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3221 |
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3222 void InstanceKlass::oop_verify_on(oop obj, outputStream* st) { |
0 | 3223 Klass::oop_verify_on(obj, st); |
3224 VerifyFieldClosure blk; | |
6725
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3225 obj->oop_iterate_no_header(&blk); |
0 | 3226 } |
3227 | |
6725
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3228 |
113
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3229 // JNIid class for jfieldIDs only |
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3230 // Note to reviewers: |
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3231 // These JNI functions are just moved over to column 1 and not changed |
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3232 // in the compressed oops workspace. |
6725
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3233 JNIid::JNIid(Klass* holder, int offset, JNIid* next) { |
113
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3234 _holder = holder; |
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3235 _offset = offset; |
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3236 _next = next; |
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3237 debug_only(_is_static_field_id = false;) |
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3238 } |
0 | 3239 |
3240 | |
113
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3241 JNIid* JNIid::find(int offset) { |
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3242 JNIid* current = this; |
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3243 while (current != NULL) { |
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3244 if (current->offset() == offset) return current; |
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3245 current = current->next(); |
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3246 } |
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|
3247 return NULL; |
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3248 } |
0 | 3249 |
3250 void JNIid::deallocate(JNIid* current) { | |
113
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3251 while (current != NULL) { |
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3252 JNIid* next = current->next(); |
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3253 delete current; |
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|
3254 current = next; |
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3255 } |
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3256 } |
0 | 3257 |
3258 | |
6725
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3259 void JNIid::verify(Klass* holder) { |
6735
aed758eda82a
7195833: NPG: Rename instanceClassLoaderKlass, instanceRefKlass and instanceMirrorKlass
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|
3260 int first_field_offset = InstanceMirrorKlass::offset_of_static_fields(); |
113
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3261 int end_field_offset; |
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3262 end_field_offset = first_field_offset + (InstanceKlass::cast(holder)->static_field_size() * wordSize); |
0 | 3263 |
113
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3264 JNIid* current = this; |
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3265 while (current != NULL) { |
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3266 guarantee(current->holder() == holder, "Invalid klass in JNIid"); |
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|
3267 #ifdef ASSERT |
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3268 int o = current->offset(); |
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3269 if (current->is_static_field_id()) { |
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3270 guarantee(o >= first_field_offset && o < end_field_offset, "Invalid static field offset in JNIid"); |
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|
3271 } |
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|
3272 #endif |
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|
3273 current = current->next(); |
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|
3274 } |
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|
3275 } |
0 | 3276 |
3277 | |
3278 #ifdef ASSERT | |
6725
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3279 void InstanceKlass::set_init_state(ClassState state) { |
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3280 bool good_state = is_shared() ? (_init_state <= state) |
113
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3281 : (_init_state < state); |
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|
3282 assert(good_state || state == allocated, "illegal state transition"); |
4739
52b5d32fbfaf
7117052: instanceKlass::_init_state can be u1 type
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|
3283 _init_state = (u1)state; |
113
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3284 } |
0 | 3285 #endif |
3286 | |
3287 | |
3288 // RedefineClasses() support for previous versions: | |
3289 | |
6725
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3290 // Purge previous versions |
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|
3291 static void purge_previous_versions_internal(InstanceKlass* ik, int emcp_method_count) { |
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3292 if (ik->previous_versions() != NULL) { |
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3293 // This klass has previous versions so see what we can cleanup |
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3294 // while it is safe to do so. |
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3295 |
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3296 int deleted_count = 0; // leave debugging breadcrumbs |
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3297 int live_count = 0; |
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3298 ClassLoaderData* loader_data = ik->class_loader_data() == NULL ? |
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3299 ClassLoaderData::the_null_class_loader_data() : |
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3300 ik->class_loader_data(); |
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|
3301 |
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|
3302 // RC_TRACE macro has an embedded ResourceMark |
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3303 RC_TRACE(0x00000200, ("purge: %s: previous version length=%d", |
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3304 ik->external_name(), ik->previous_versions()->length())); |
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3305 |
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3306 for (int i = ik->previous_versions()->length() - 1; i >= 0; i--) { |
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3307 // check the previous versions array |
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3308 PreviousVersionNode * pv_node = ik->previous_versions()->at(i); |
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3309 ConstantPool* cp_ref = pv_node->prev_constant_pool(); |
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3310 assert(cp_ref != NULL, "cp ref was unexpectedly cleared"); |
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3311 |
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3312 ConstantPool* pvcp = cp_ref; |
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3313 if (!pvcp->on_stack()) { |
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3314 // If the constant pool isn't on stack, none of the methods |
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3315 // are executing. Delete all the methods, the constant pool and |
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3316 // and this previous version node. |
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3317 GrowableArray<Method*>* method_refs = pv_node->prev_EMCP_methods(); |
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3318 if (method_refs != NULL) { |
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3319 for (int j = method_refs->length() - 1; j >= 0; j--) { |
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3320 Method* method = method_refs->at(j); |
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3321 assert(method != NULL, "method ref was unexpectedly cleared"); |
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3322 method_refs->remove_at(j); |
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3323 // method will be freed with associated class. |
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|
3324 } |
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3325 } |
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|
3326 // Remove the constant pool |
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|
3327 delete pv_node; |
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|
3328 // Since we are traversing the array backwards, we don't have to |
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|
3329 // do anything special with the index. |
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|
3330 ik->previous_versions()->remove_at(i); |
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|
3331 deleted_count++; |
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|
3332 continue; |
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|
3333 } else { |
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|
3334 RC_TRACE(0x00000200, ("purge: previous version @%d is alive", i)); |
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3335 assert(pvcp->pool_holder() != NULL, "Constant pool with no holder"); |
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3336 guarantee (!loader_data->is_unloading(), "unloaded classes can't be on the stack"); |
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|
3337 live_count++; |
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|
3338 } |
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|
3339 |
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3340 // At least one method is live in this previous version, clean out |
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3341 // the others or mark them as obsolete. |
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|
3342 GrowableArray<Method*>* method_refs = pv_node->prev_EMCP_methods(); |
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|
3343 if (method_refs != NULL) { |
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3344 RC_TRACE(0x00000200, ("purge: previous methods length=%d", |
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|
3345 method_refs->length())); |
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|
3346 for (int j = method_refs->length() - 1; j >= 0; j--) { |
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3347 Method* method = method_refs->at(j); |
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3348 assert(method != NULL, "method ref was unexpectedly cleared"); |
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|
3349 |
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|
3350 // Remove the emcp method if it's not executing |
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3351 // If it's been made obsolete by a redefinition of a non-emcp |
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3352 // method, mark it as obsolete but leave it to clean up later. |
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|
3353 if (!method->on_stack()) { |
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|
3354 method_refs->remove_at(j); |
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3355 } else if (emcp_method_count == 0) { |
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|
3356 method->set_is_obsolete(); |
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|
3357 } else { |
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|
3358 // RC_TRACE macro has an embedded ResourceMark |
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|
3359 RC_TRACE(0x00000200, |
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3360 ("purge: %s(%s): prev method @%d in version @%d is alive", |
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|
3361 method->name()->as_C_string(), |
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|
3362 method->signature()->as_C_string(), j, i)); |
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|
3363 } |
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|
3364 } |
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|
3365 } |
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|
3366 } |
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|
3367 assert(ik->previous_versions()->length() == live_count, "sanity check"); |
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|
3368 RC_TRACE(0x00000200, |
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3369 ("purge: previous version stats: live=%d, deleted=%d", live_count, |
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|
3370 deleted_count)); |
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|
3371 } |
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|
3372 } |
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|
3373 |
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|
3374 // External interface for use during class unloading. |
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3375 void InstanceKlass::purge_previous_versions(InstanceKlass* ik) { |
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3376 // Call with >0 emcp methods since they are not currently being redefined. |
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3377 purge_previous_versions_internal(ik, 1); |
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|
3378 } |
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|
3379 |
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|
3380 |
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|
3381 // Potentially add an information node that contains pointers to the |
0 | 3382 // interesting parts of the previous version of the_class. |
6725
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|
3383 // This is also where we clean out any unused references. |
977
74a5db69c1fe
6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents:
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diff
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|
3384 // Note that while we delete nodes from the _previous_versions |
74a5db69c1fe
6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents:
974
diff
changeset
|
3385 // array, we never delete the array itself until the klass is |
74a5db69c1fe
6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents:
974
diff
changeset
|
3386 // unloaded. The has_been_redefined() query depends on that fact. |
74a5db69c1fe
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dcubed
parents:
974
diff
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|
3387 // |
6725
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|
3388 void InstanceKlass::add_previous_version(instanceKlassHandle ikh, |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
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52
diff
changeset
|
3389 BitMap* emcp_methods, int emcp_method_count) { |
0 | 3390 assert(Thread::current()->is_VM_thread(), |
113
ba764ed4b6f2
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52
diff
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|
3391 "only VMThread can add previous versions"); |
0 | 3392 |
3393 if (_previous_versions == NULL) { | |
3394 // This is the first previous version so make some space. | |
3395 // Start with 2 elements under the assumption that the class | |
3396 // won't be redefined much. | |
6197 | 3397 _previous_versions = new (ResourceObj::C_HEAP, mtClass) |
0 | 3398 GrowableArray<PreviousVersionNode *>(2, true); |
3399 } | |
3400 | |
6725
da91efe96a93
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|
3401 ConstantPool* cp_ref = ikh->constants(); |
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|
3402 |
0 | 3403 // RC_TRACE macro has an embedded ResourceMark |
6725
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|
3404 RC_TRACE(0x00000400, ("adding previous version ref for %s @%d, EMCP_cnt=%d " |
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|
3405 "on_stack=%d", |
da91efe96a93
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|
3406 ikh->external_name(), _previous_versions->length(), emcp_method_count, |
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|
3407 cp_ref->on_stack())); |
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|
3408 |
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|
3409 // If the constant pool for this previous version of the class |
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|
3410 // is not marked as being on the stack, then none of the methods |
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|
3411 // in this previous version of the class are on the stack so |
da91efe96a93
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|
3412 // we don't need to create a new PreviousVersionNode. However, |
da91efe96a93
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diff
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|
3413 // we still need to examine older previous versions below. |
da91efe96a93
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|
3414 Array<Method*>* old_methods = ikh->methods(); |
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|
3415 |
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|
3416 if (cp_ref->on_stack()) { |
0 | 3417 PreviousVersionNode * pv_node = NULL; |
3418 if (emcp_method_count == 0) { | |
6725
da91efe96a93
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|
3419 // non-shared ConstantPool gets a reference |
da91efe96a93
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|
3420 pv_node = new PreviousVersionNode(cp_ref, !cp_ref->is_shared(), NULL); |
0 | 3421 RC_TRACE(0x00000400, |
6725
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|
3422 ("add: all methods are obsolete; flushing any EMCP refs")); |
0 | 3423 } else { |
3424 int local_count = 0; | |
6725
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|
3425 GrowableArray<Method*>* method_refs = new (ResourceObj::C_HEAP, mtClass) |
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|
3426 GrowableArray<Method*>(emcp_method_count, true); |
0 | 3427 for (int i = 0; i < old_methods->length(); i++) { |
3428 if (emcp_methods->at(i)) { | |
6725
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|
3429 // this old method is EMCP. Save it only if it's on the stack |
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|
3430 Method* old_method = old_methods->at(i); |
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|
3431 if (old_method->on_stack()) { |
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|
3432 method_refs->append(old_method); |
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|
3433 } |
0 | 3434 if (++local_count >= emcp_method_count) { |
3435 // no more EMCP methods so bail out now | |
3436 break; | |
3437 } | |
3438 } | |
3439 } | |
6725
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|
3440 // non-shared ConstantPool gets a reference |
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|
3441 pv_node = new PreviousVersionNode(cp_ref, !cp_ref->is_shared(), method_refs); |
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|
3442 } |
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|
3443 // append new previous version. |
0 | 3444 _previous_versions->append(pv_node); |
6725
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|
3445 } |
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diff
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|
3446 |
da91efe96a93
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|
3447 // Since the caller is the VMThread and we are at a safepoint, this |
da91efe96a93
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diff
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|
3448 // is a good time to clear out unused references. |
0 | 3449 |
3450 RC_TRACE(0x00000400, ("add: previous version length=%d", | |
3451 _previous_versions->length())); | |
3452 | |
6725
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diff
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|
3453 // Purge previous versions not executing on the stack |
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|
3454 purge_previous_versions_internal(this, emcp_method_count); |
0 | 3455 |
3456 int obsolete_method_count = old_methods->length() - emcp_method_count; | |
3457 | |
3458 if (emcp_method_count != 0 && obsolete_method_count != 0 && | |
6725
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|
3459 _previous_versions->length() > 0) { |
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|
3460 // We have a mix of obsolete and EMCP methods so we have to |
0 | 3461 // clear out any matching EMCP method entries the hard way. |
3462 int local_count = 0; | |
3463 for (int i = 0; i < old_methods->length(); i++) { | |
3464 if (!emcp_methods->at(i)) { | |
3465 // only obsolete methods are interesting | |
6725
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|
3466 Method* old_method = old_methods->at(i); |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
3467 Symbol* m_name = old_method->name(); |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
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1972
diff
changeset
|
3468 Symbol* m_signature = old_method->signature(); |
0 | 3469 |
6725
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|
3470 // we might not have added the last entry |
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|
3471 for (int j = _previous_versions->length() - 1; j >= 0; j--) { |
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|
3472 // check the previous versions array for non executing obsolete methods |
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|
3473 PreviousVersionNode * pv_node = _previous_versions->at(j); |
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|
3474 |
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|
3475 GrowableArray<Method*>* method_refs = pv_node->prev_EMCP_methods(); |
0 | 3476 if (method_refs == NULL) { |
3477 // We have run into a PreviousVersion generation where | |
3478 // all methods were made obsolete during that generation's | |
3479 // RedefineClasses() operation. At the time of that | |
3480 // operation, all EMCP methods were flushed so we don't | |
3481 // have to go back any further. | |
3482 // | |
3483 // A NULL method_refs is different than an empty method_refs. | |
3484 // We cannot infer any optimizations about older generations | |
3485 // from an empty method_refs for the current generation. | |
3486 break; | |
3487 } | |
3488 | |
3489 for (int k = method_refs->length() - 1; k >= 0; k--) { | |
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3490 Method* method = method_refs->at(k); |
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3491 |
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3492 if (!method->is_obsolete() && |
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3493 method->name() == m_name && |
0 | 3494 method->signature() == m_signature) { |
3495 // The current RedefineClasses() call has made all EMCP | |
3496 // versions of this method obsolete so mark it as obsolete | |
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3497 // and remove the reference. |
0 | 3498 RC_TRACE(0x00000400, |
3499 ("add: %s(%s): flush obsolete method @%d in version @%d", | |
3500 m_name->as_C_string(), m_signature->as_C_string(), k, j)); | |
3501 | |
3502 method->set_is_obsolete(); | |
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3503 // Leave obsolete methods on the previous version list to |
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3504 // clean up later. |
0 | 3505 break; |
3506 } | |
3507 } | |
3508 | |
3509 // The previous loop may not find a matching EMCP method, but | |
3510 // that doesn't mean that we can optimize and not go any | |
3511 // further back in the PreviousVersion generations. The EMCP | |
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3512 // method for this generation could have already been deleted, |
0 | 3513 // but there still may be an older EMCP method that has not |
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3514 // been deleted. |
0 | 3515 } |
3516 | |
3517 if (++local_count >= obsolete_method_count) { | |
3518 // no more obsolete methods so bail out now | |
3519 break; | |
3520 } | |
3521 } | |
3522 } | |
3523 } | |
3524 } // end add_previous_version() | |
3525 | |
3526 | |
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3527 // Determine if InstanceKlass has a previous version. |
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3528 bool InstanceKlass::has_previous_version() const { |
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3529 return (_previous_versions != NULL && _previous_versions->length() > 0); |
0 | 3530 } // end has_previous_version() |
3531 | |
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3532 |
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3533 Method* InstanceKlass::method_with_idnum(int idnum) { |
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3534 Method* m = NULL; |
0 | 3535 if (idnum < methods()->length()) { |
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3536 m = methods()->at(idnum); |
0 | 3537 } |
3538 if (m == NULL || m->method_idnum() != idnum) { | |
3539 for (int index = 0; index < methods()->length(); ++index) { | |
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3540 m = methods()->at(index); |
0 | 3541 if (m->method_idnum() == idnum) { |
3542 return m; | |
3543 } | |
3544 } | |
3545 } | |
3546 return m; | |
3547 } | |
3548 | |
3549 | |
3550 // Construct a PreviousVersionNode entry for the array hung off | |
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3551 // the InstanceKlass. |
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3552 PreviousVersionNode::PreviousVersionNode(ConstantPool* prev_constant_pool, |
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3553 bool prev_cp_is_weak, GrowableArray<Method*>* prev_EMCP_methods) { |
0 | 3554 |
3555 _prev_constant_pool = prev_constant_pool; | |
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3556 _prev_cp_is_weak = prev_cp_is_weak; |
0 | 3557 _prev_EMCP_methods = prev_EMCP_methods; |
3558 } | |
3559 | |
3560 | |
3561 // Destroy a PreviousVersionNode | |
3562 PreviousVersionNode::~PreviousVersionNode() { | |
3563 if (_prev_constant_pool != NULL) { | |
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3564 _prev_constant_pool = NULL; |
0 | 3565 } |
3566 | |
3567 if (_prev_EMCP_methods != NULL) { | |
3568 delete _prev_EMCP_methods; | |
3569 } | |
3570 } | |
3571 | |
3572 | |
3573 // Construct a PreviousVersionInfo entry | |
3574 PreviousVersionInfo::PreviousVersionInfo(PreviousVersionNode *pv_node) { | |
3575 _prev_constant_pool_handle = constantPoolHandle(); // NULL handle | |
3576 _prev_EMCP_method_handles = NULL; | |
3577 | |
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3578 ConstantPool* cp = pv_node->prev_constant_pool(); |
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3579 assert(cp != NULL, "constant pool ref was unexpectedly cleared"); |
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3580 if (cp == NULL) { |
0 | 3581 return; // robustness |
3582 } | |
3583 | |
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3584 // make the ConstantPool* safe to return |
0 | 3585 _prev_constant_pool_handle = constantPoolHandle(cp); |
3586 | |
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3587 GrowableArray<Method*>* method_refs = pv_node->prev_EMCP_methods(); |
0 | 3588 if (method_refs == NULL) { |
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3589 // the InstanceKlass did not have any EMCP methods |
0 | 3590 return; |
3591 } | |
3592 | |
3593 _prev_EMCP_method_handles = new GrowableArray<methodHandle>(10); | |
3594 | |
3595 int n_methods = method_refs->length(); | |
3596 for (int i = 0; i < n_methods; i++) { | |
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3597 Method* method = method_refs->at(i); |
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3598 assert (method != NULL, "method has been cleared"); |
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3599 if (method == NULL) { |
0 | 3600 continue; // robustness |
3601 } | |
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3602 // make the Method* safe to return |
0 | 3603 _prev_EMCP_method_handles->append(methodHandle(method)); |
3604 } | |
3605 } | |
3606 | |
3607 | |
3608 // Destroy a PreviousVersionInfo | |
3609 PreviousVersionInfo::~PreviousVersionInfo() { | |
3610 // Since _prev_EMCP_method_handles is not C-heap allocated, we | |
3611 // don't have to delete it. | |
3612 } | |
3613 | |
3614 | |
3615 // Construct a helper for walking the previous versions array | |
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3616 PreviousVersionWalker::PreviousVersionWalker(InstanceKlass *ik) { |
0 | 3617 _previous_versions = ik->previous_versions(); |
3618 _current_index = 0; | |
3619 // _hm needs no initialization | |
3620 _current_p = NULL; | |
3621 } | |
3622 | |
3623 | |
3624 // Destroy a PreviousVersionWalker | |
3625 PreviousVersionWalker::~PreviousVersionWalker() { | |
3626 // Delete the current info just in case the caller didn't walk to | |
3627 // the end of the previous versions list. No harm if _current_p is | |
3628 // already NULL. | |
3629 delete _current_p; | |
3630 | |
3631 // When _hm is destroyed, all the Handles returned in | |
3632 // PreviousVersionInfo objects will be destroyed. | |
3633 // Also, after this destructor is finished it will be | |
3634 // safe to delete the GrowableArray allocated in the | |
3635 // PreviousVersionInfo objects. | |
3636 } | |
3637 | |
3638 | |
3639 // Return the interesting information for the next previous version | |
3640 // of the klass. Returns NULL if there are no more previous versions. | |
3641 PreviousVersionInfo* PreviousVersionWalker::next_previous_version() { | |
3642 if (_previous_versions == NULL) { | |
3643 // no previous versions so nothing to return | |
3644 return NULL; | |
3645 } | |
3646 | |
3647 delete _current_p; // cleanup the previous info for the caller | |
3648 _current_p = NULL; // reset to NULL so we don't delete same object twice | |
3649 | |
3650 int length = _previous_versions->length(); | |
3651 | |
3652 while (_current_index < length) { | |
3653 PreviousVersionNode * pv_node = _previous_versions->at(_current_index++); | |
6197 | 3654 PreviousVersionInfo * pv_info = new (ResourceObj::C_HEAP, mtClass) |
0 | 3655 PreviousVersionInfo(pv_node); |
3656 | |
3657 constantPoolHandle cp_h = pv_info->prev_constant_pool_handle(); | |
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3658 assert (!cp_h.is_null(), "null cp found in previous version"); |
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3659 |
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3660 // The caller will need to delete pv_info when they are done with it. |
0 | 3661 _current_p = pv_info; |
3662 return pv_info; | |
3663 } | |
3664 | |
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3665 // all of the underlying nodes' info has been deleted |
0 | 3666 return NULL; |
3667 } // end next_previous_version() |