Mercurial > hg > truffle
annotate src/share/vm/oops/instanceKlass.cpp @ 7464:ecd24264898b
8005048: NMT: #loaded classes needs to just show the # defined classes
Summary: Count number of instance classes so that it matches class metadata size
Reviewed-by: coleenp, acorn
author | zgu |
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date | Tue, 08 Jan 2013 14:04:25 -0500 |
parents | f34d701e952e |
children | 37a3e8b7a1e9 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "classfile/javaClasses.hpp" | |
27 #include "classfile/systemDictionary.hpp" | |
28 #include "classfile/verifier.hpp" | |
29 #include "classfile/vmSymbols.hpp" | |
30 #include "compiler/compileBroker.hpp" | |
31 #include "gc_implementation/shared/markSweep.inline.hpp" | |
32 #include "gc_interface/collectedHeap.inline.hpp" | |
33 #include "interpreter/oopMapCache.hpp" | |
34 #include "interpreter/rewriter.hpp" | |
35 #include "jvmtifiles/jvmti.h" | |
36 #include "memory/genOopClosures.inline.hpp" | |
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37 #include "memory/metadataFactory.hpp" |
1972 | 38 #include "memory/oopFactory.hpp" |
3938 | 39 #include "oops/fieldStreams.hpp" |
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40 #include "oops/instanceClassLoaderKlass.hpp" |
1972 | 41 #include "oops/instanceKlass.hpp" |
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42 #include "oops/instanceMirrorKlass.hpp" |
1972 | 43 #include "oops/instanceOop.hpp" |
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44 #include "oops/klass.inline.hpp" |
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45 #include "oops/method.hpp" |
1972 | 46 #include "oops/oop.inline.hpp" |
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47 #include "oops/symbol.hpp" |
1972 | 48 #include "prims/jvmtiExport.hpp" |
49 #include "prims/jvmtiRedefineClassesTrace.hpp" | |
50 #include "runtime/fieldDescriptor.hpp" | |
51 #include "runtime/handles.inline.hpp" | |
52 #include "runtime/javaCalls.hpp" | |
53 #include "runtime/mutexLocker.hpp" | |
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54 #include "runtime/thread.inline.hpp" |
1972 | 55 #include "services/threadService.hpp" |
56 #include "utilities/dtrace.hpp" | |
57 #ifndef SERIALGC | |
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58 #include "gc_implementation/concurrentMarkSweep/cmsOopClosures.inline.hpp" |
1972 | 59 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" |
60 #include "gc_implementation/g1/g1OopClosures.inline.hpp" | |
61 #include "gc_implementation/g1/g1RemSet.inline.hpp" | |
62 #include "gc_implementation/g1/heapRegionSeq.inline.hpp" | |
63 #include "gc_implementation/parNew/parOopClosures.inline.hpp" | |
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64 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.inline.hpp" |
1972 | 65 #include "gc_implementation/parallelScavenge/psPromotionManager.inline.hpp" |
66 #include "gc_implementation/parallelScavenge/psScavenge.inline.hpp" | |
67 #include "oops/oop.pcgc.inline.hpp" | |
68 #endif | |
69 #ifdef COMPILER1 | |
70 #include "c1/c1_Compiler.hpp" | |
71 #endif | |
0 | 72 |
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73 #ifdef DTRACE_ENABLED |
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74 |
4006 | 75 #ifndef USDT2 |
76 | |
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77 HS_DTRACE_PROBE_DECL4(hotspot, class__initialization__required, |
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78 char*, intptr_t, oop, intptr_t); |
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79 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__recursive, |
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80 char*, intptr_t, oop, intptr_t, int); |
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81 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__concurrent, |
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82 char*, intptr_t, oop, intptr_t, int); |
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83 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__erroneous, |
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84 char*, intptr_t, oop, intptr_t, int); |
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85 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__super__failed, |
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86 char*, intptr_t, oop, intptr_t, int); |
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87 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__clinit, |
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88 char*, intptr_t, oop, intptr_t, int); |
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89 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__error, |
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90 char*, intptr_t, oop, intptr_t, int); |
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91 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__end, |
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92 char*, intptr_t, oop, intptr_t, int); |
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93 |
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94 #define DTRACE_CLASSINIT_PROBE(type, clss, thread_type) \ |
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95 { \ |
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96 char* data = NULL; \ |
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97 int len = 0; \ |
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98 Symbol* name = (clss)->name(); \ |
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99 if (name != NULL) { \ |
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100 data = (char*)name->bytes(); \ |
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101 len = name->utf8_length(); \ |
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102 } \ |
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103 HS_DTRACE_PROBE4(hotspot, class__initialization__##type, \ |
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104 data, len, (clss)->class_loader(), thread_type); \ |
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105 } |
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106 |
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107 #define DTRACE_CLASSINIT_PROBE_WAIT(type, clss, thread_type, wait) \ |
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108 { \ |
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109 char* data = NULL; \ |
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110 int len = 0; \ |
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111 Symbol* name = (clss)->name(); \ |
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112 if (name != NULL) { \ |
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113 data = (char*)name->bytes(); \ |
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114 len = name->utf8_length(); \ |
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115 } \ |
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116 HS_DTRACE_PROBE5(hotspot, class__initialization__##type, \ |
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117 data, len, (clss)->class_loader(), thread_type, wait); \ |
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118 } |
4006 | 119 #else /* USDT2 */ |
120 | |
121 #define HOTSPOT_CLASS_INITIALIZATION_required HOTSPOT_CLASS_INITIALIZATION_REQUIRED | |
122 #define HOTSPOT_CLASS_INITIALIZATION_recursive HOTSPOT_CLASS_INITIALIZATION_RECURSIVE | |
123 #define HOTSPOT_CLASS_INITIALIZATION_concurrent HOTSPOT_CLASS_INITIALIZATION_CONCURRENT | |
124 #define HOTSPOT_CLASS_INITIALIZATION_erroneous HOTSPOT_CLASS_INITIALIZATION_ERRONEOUS | |
125 #define HOTSPOT_CLASS_INITIALIZATION_super__failed HOTSPOT_CLASS_INITIALIZATION_SUPER_FAILED | |
126 #define HOTSPOT_CLASS_INITIALIZATION_clinit HOTSPOT_CLASS_INITIALIZATION_CLINIT | |
127 #define HOTSPOT_CLASS_INITIALIZATION_error HOTSPOT_CLASS_INITIALIZATION_ERROR | |
128 #define HOTSPOT_CLASS_INITIALIZATION_end HOTSPOT_CLASS_INITIALIZATION_END | |
129 #define DTRACE_CLASSINIT_PROBE(type, clss, thread_type) \ | |
130 { \ | |
131 char* data = NULL; \ | |
132 int len = 0; \ | |
133 Symbol* name = (clss)->name(); \ | |
134 if (name != NULL) { \ | |
135 data = (char*)name->bytes(); \ | |
136 len = name->utf8_length(); \ | |
137 } \ | |
138 HOTSPOT_CLASS_INITIALIZATION_##type( \ | |
139 data, len, (clss)->class_loader(), thread_type); \ | |
140 } | |
141 | |
142 #define DTRACE_CLASSINIT_PROBE_WAIT(type, clss, thread_type, wait) \ | |
143 { \ | |
144 char* data = NULL; \ | |
145 int len = 0; \ | |
146 Symbol* name = (clss)->name(); \ | |
147 if (name != NULL) { \ | |
148 data = (char*)name->bytes(); \ | |
149 len = name->utf8_length(); \ | |
150 } \ | |
151 HOTSPOT_CLASS_INITIALIZATION_##type( \ | |
152 data, len, (clss)->class_loader(), thread_type, wait); \ | |
153 } | |
154 #endif /* USDT2 */ | |
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155 |
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156 #else // ndef DTRACE_ENABLED |
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157 |
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158 #define DTRACE_CLASSINIT_PROBE(type, clss, thread_type) |
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159 #define DTRACE_CLASSINIT_PROBE_WAIT(type, clss, thread_type, wait) |
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160 |
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161 #endif // ndef DTRACE_ENABLED |
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162 |
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163 volatile int InstanceKlass::_total_instanceKlass_count = 0; |
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164 |
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165 Klass* InstanceKlass::allocate_instance_klass(ClassLoaderData* loader_data, |
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166 int vtable_len, |
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167 int itable_len, |
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168 int static_field_size, |
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169 int nonstatic_oop_map_size, |
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170 ReferenceType rt, |
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171 AccessFlags access_flags, |
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172 Symbol* name, |
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173 Klass* super_klass, |
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174 KlassHandle host_klass, |
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175 TRAPS) { |
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176 |
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177 int size = InstanceKlass::size(vtable_len, itable_len, nonstatic_oop_map_size, |
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178 access_flags.is_interface(), |
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179 !host_klass.is_null()); |
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180 |
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181 // Allocation |
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182 InstanceKlass* ik; |
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183 if (rt == REF_NONE) { |
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184 if (name == vmSymbols::java_lang_Class()) { |
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185 ik = new (loader_data, size, THREAD) InstanceMirrorKlass( |
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186 vtable_len, itable_len, static_field_size, nonstatic_oop_map_size, rt, |
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187 access_flags, !host_klass.is_null()); |
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188 } else if (name == vmSymbols::java_lang_ClassLoader() || |
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189 (SystemDictionary::ClassLoader_klass_loaded() && |
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190 super_klass != NULL && |
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191 super_klass->is_subtype_of(SystemDictionary::ClassLoader_klass()))) { |
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192 ik = new (loader_data, size, THREAD) InstanceClassLoaderKlass( |
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193 vtable_len, itable_len, static_field_size, nonstatic_oop_map_size, rt, |
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194 access_flags, !host_klass.is_null()); |
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195 } else { |
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196 // normal class |
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197 ik = new (loader_data, size, THREAD) InstanceKlass( |
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198 vtable_len, itable_len, static_field_size, nonstatic_oop_map_size, rt, |
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199 access_flags, !host_klass.is_null()); |
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200 } |
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201 } else { |
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202 // reference klass |
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203 ik = new (loader_data, size, THREAD) InstanceRefKlass( |
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204 vtable_len, itable_len, static_field_size, nonstatic_oop_map_size, rt, |
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205 access_flags, !host_klass.is_null()); |
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206 } |
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207 |
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208 Atomic::inc(&_total_instanceKlass_count); |
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209 return ik; |
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210 } |
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211 |
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212 InstanceKlass::InstanceKlass(int vtable_len, |
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213 int itable_len, |
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214 int static_field_size, |
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215 int nonstatic_oop_map_size, |
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216 ReferenceType rt, |
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217 AccessFlags access_flags, |
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218 bool is_anonymous) { |
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219 No_Safepoint_Verifier no_safepoint; // until k becomes parsable |
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220 |
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221 int size = InstanceKlass::size(vtable_len, itable_len, nonstatic_oop_map_size, |
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222 access_flags.is_interface(), is_anonymous); |
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223 |
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224 // The sizes of these these three variables are used for determining the |
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225 // size of the instanceKlassOop. It is critical that these are set to the right |
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226 // sizes before the first GC, i.e., when we allocate the mirror. |
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227 this->set_vtable_length(vtable_len); |
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228 this->set_itable_length(itable_len); |
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229 this->set_static_field_size(static_field_size); |
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230 this->set_nonstatic_oop_map_size(nonstatic_oop_map_size); |
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231 this->set_access_flags(access_flags); |
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232 this->set_is_anonymous(is_anonymous); |
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233 assert(this->size() == size, "wrong size for object"); |
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234 |
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235 this->set_array_klasses(NULL); |
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236 this->set_methods(NULL); |
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237 this->set_method_ordering(NULL); |
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238 this->set_local_interfaces(NULL); |
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239 this->set_transitive_interfaces(NULL); |
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240 this->init_implementor(); |
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241 this->set_fields(NULL, 0); |
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242 this->set_constants(NULL); |
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243 this->set_class_loader_data(NULL); |
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244 this->set_protection_domain(NULL); |
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245 this->set_signers(NULL); |
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246 this->set_source_file_name(NULL); |
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247 this->set_source_debug_extension(NULL, 0); |
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248 this->set_array_name(NULL); |
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249 this->set_inner_classes(NULL); |
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250 this->set_static_oop_field_count(0); |
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251 this->set_nonstatic_field_size(0); |
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252 this->set_is_marked_dependent(false); |
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253 this->set_init_state(InstanceKlass::allocated); |
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254 this->set_init_thread(NULL); |
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255 this->set_init_lock(NULL); |
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256 this->set_reference_type(rt); |
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257 this->set_oop_map_cache(NULL); |
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258 this->set_jni_ids(NULL); |
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259 this->set_osr_nmethods_head(NULL); |
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260 this->set_breakpoints(NULL); |
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261 this->init_previous_versions(); |
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262 this->set_generic_signature(NULL); |
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263 this->release_set_methods_jmethod_ids(NULL); |
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264 this->release_set_methods_cached_itable_indices(NULL); |
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265 this->set_annotations(NULL); |
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266 this->set_jvmti_cached_class_field_map(NULL); |
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267 this->set_initial_method_idnum(0); |
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268 |
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269 // initialize the non-header words to zero |
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270 intptr_t* p = (intptr_t*)this; |
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271 for (int index = InstanceKlass::header_size(); index < size; index++) { |
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272 p[index] = NULL_WORD; |
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273 } |
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274 |
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275 // Set temporary value until parseClassFile updates it with the real instance |
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276 // size. |
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277 this->set_layout_helper(Klass::instance_layout_helper(0, true)); |
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278 } |
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279 |
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280 |
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281 // This function deallocates the metadata and C heap pointers that the |
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282 // InstanceKlass points to. |
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283 void InstanceKlass::deallocate_contents(ClassLoaderData* loader_data) { |
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284 |
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285 // Orphan the mirror first, CMS thinks it's still live. |
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286 java_lang_Class::set_klass(java_mirror(), NULL); |
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287 |
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288 // Need to take this class off the class loader data list. |
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289 loader_data->remove_class(this); |
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290 |
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291 // The array_klass for this class is created later, after error handling. |
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292 // For class redefinition, we keep the original class so this scratch class |
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293 // doesn't have an array class. Either way, assert that there is nothing |
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294 // to deallocate. |
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295 assert(array_klasses() == NULL, "array classes shouldn't be created for this class yet"); |
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296 |
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297 // Release C heap allocated data that this might point to, which includes |
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298 // reference counting symbol names. |
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299 release_C_heap_structures(); |
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300 |
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301 Array<Method*>* ms = methods(); |
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302 if (ms != Universe::the_empty_method_array()) { |
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303 for (int i = 0; i <= methods()->length() -1 ; i++) { |
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304 Method* method = methods()->at(i); |
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305 // Only want to delete methods that are not executing for RedefineClasses. |
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306 // The previous version will point to them so they're not totally dangling |
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307 assert (!method->on_stack(), "shouldn't be called with methods on stack"); |
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308 MetadataFactory::free_metadata(loader_data, method); |
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309 } |
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310 MetadataFactory::free_array<Method*>(loader_data, methods()); |
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311 } |
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312 set_methods(NULL); |
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313 |
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314 if (method_ordering() != Universe::the_empty_int_array()) { |
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315 MetadataFactory::free_array<int>(loader_data, method_ordering()); |
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316 } |
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317 set_method_ordering(NULL); |
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318 |
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319 // This array is in Klass, but remove it with the InstanceKlass since |
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320 // this place would be the only caller and it can share memory with transitive |
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321 // interfaces. |
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322 if (secondary_supers() != Universe::the_empty_klass_array() && |
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323 secondary_supers() != transitive_interfaces()) { |
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324 MetadataFactory::free_array<Klass*>(loader_data, secondary_supers()); |
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325 } |
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326 set_secondary_supers(NULL); |
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327 |
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328 // Only deallocate transitive interfaces if not empty, same as super class |
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329 // or same as local interfaces. See code in parseClassFile. |
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330 Array<Klass*>* ti = transitive_interfaces(); |
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331 if (ti != Universe::the_empty_klass_array() && ti != local_interfaces()) { |
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332 // check that the interfaces don't come from super class |
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333 Array<Klass*>* sti = (super() == NULL) ? NULL : |
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334 InstanceKlass::cast(super())->transitive_interfaces(); |
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335 if (ti != sti) { |
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336 MetadataFactory::free_array<Klass*>(loader_data, ti); |
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337 } |
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338 } |
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339 set_transitive_interfaces(NULL); |
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340 |
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341 // local interfaces can be empty |
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342 Array<Klass*>* li = local_interfaces(); |
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343 if (li != Universe::the_empty_klass_array()) { |
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344 MetadataFactory::free_array<Klass*>(loader_data, li); |
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345 } |
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346 set_local_interfaces(NULL); |
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347 |
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348 MetadataFactory::free_array<jushort>(loader_data, fields()); |
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349 set_fields(NULL, 0); |
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350 |
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351 // If a method from a redefined class is using this constant pool, don't |
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352 // delete it, yet. The new class's previous version will point to this. |
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353 assert (!constants()->on_stack(), "shouldn't be called if anything is onstack"); |
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354 MetadataFactory::free_metadata(loader_data, constants()); |
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355 set_constants(NULL); |
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356 |
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357 if (inner_classes() != Universe::the_empty_short_array()) { |
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358 MetadataFactory::free_array<jushort>(loader_data, inner_classes()); |
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359 } |
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360 set_inner_classes(NULL); |
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361 |
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362 // Null out Java heap objects, although these won't be walked to keep |
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363 // alive once this InstanceKlass is deallocated. |
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364 set_protection_domain(NULL); |
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365 set_signers(NULL); |
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366 set_init_lock(NULL); |
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367 set_annotations(NULL); |
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368 } |
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369 |
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370 volatile oop InstanceKlass::init_lock() const { |
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371 volatile oop lock = _init_lock; // read once |
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372 assert((oop)lock != NULL || !is_not_initialized(), // initialized or in_error state |
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373 "only fully initialized state can have a null lock"); |
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374 return lock; |
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375 } |
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376 |
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377 // Set the initialization lock to null so the object can be GC'ed. Any racing |
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378 // threads to get this lock will see a null lock and will not lock. |
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379 // That's okay because they all check for initialized state after getting |
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380 // the lock and return. |
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381 void InstanceKlass::fence_and_clear_init_lock() { |
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382 // make sure previous stores are all done, notably the init_state. |
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383 OrderAccess::storestore(); |
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384 klass_oop_store(&_init_lock, NULL); |
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385 assert(!is_not_initialized(), "class must be initialized now"); |
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386 } |
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387 |
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388 |
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389 bool InstanceKlass::should_be_initialized() const { |
0 | 390 return !is_initialized(); |
391 } | |
392 | |
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393 klassVtable* InstanceKlass::vtable() const { |
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394 return new klassVtable(this, start_of_vtable(), vtable_length() / vtableEntry::size()); |
0 | 395 } |
396 | |
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397 klassItable* InstanceKlass::itable() const { |
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398 return new klassItable(instanceKlassHandle(this)); |
0 | 399 } |
400 | |
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401 void InstanceKlass::eager_initialize(Thread *thread) { |
0 | 402 if (!EagerInitialization) return; |
403 | |
404 if (this->is_not_initialized()) { | |
405 // abort if the the class has a class initializer | |
406 if (this->class_initializer() != NULL) return; | |
407 | |
408 // abort if it is java.lang.Object (initialization is handled in genesis) | |
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409 Klass* super = this->super(); |
0 | 410 if (super == NULL) return; |
411 | |
412 // abort if the super class should be initialized | |
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413 if (!InstanceKlass::cast(super)->is_initialized()) return; |
0 | 414 |
415 // call body to expose the this pointer | |
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416 instanceKlassHandle this_oop(thread, this); |
0 | 417 eager_initialize_impl(this_oop); |
418 } | |
419 } | |
420 | |
421 | |
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422 void InstanceKlass::eager_initialize_impl(instanceKlassHandle this_oop) { |
0 | 423 EXCEPTION_MARK; |
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424 volatile oop init_lock = this_oop->init_lock(); |
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425 ObjectLocker ol(init_lock, THREAD, init_lock != NULL); |
0 | 426 |
427 // abort if someone beat us to the initialization | |
428 if (!this_oop->is_not_initialized()) return; // note: not equivalent to is_initialized() | |
429 | |
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430 ClassState old_state = this_oop->init_state(); |
0 | 431 link_class_impl(this_oop, true, THREAD); |
432 if (HAS_PENDING_EXCEPTION) { | |
433 CLEAR_PENDING_EXCEPTION; | |
434 // Abort if linking the class throws an exception. | |
435 | |
436 // Use a test to avoid redundantly resetting the state if there's | |
437 // no change. Set_init_state() asserts that state changes make | |
438 // progress, whereas here we might just be spinning in place. | |
439 if( old_state != this_oop->_init_state ) | |
440 this_oop->set_init_state (old_state); | |
441 } else { | |
442 // linking successfull, mark class as initialized | |
443 this_oop->set_init_state (fully_initialized); | |
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444 this_oop->fence_and_clear_init_lock(); |
0 | 445 // trace |
446 if (TraceClassInitialization) { | |
447 ResourceMark rm(THREAD); | |
448 tty->print_cr("[Initialized %s without side effects]", this_oop->external_name()); | |
449 } | |
450 } | |
451 } | |
452 | |
453 | |
454 // See "The Virtual Machine Specification" section 2.16.5 for a detailed explanation of the class initialization | |
455 // process. The step comments refers to the procedure described in that section. | |
456 // Note: implementation moved to static method to expose the this pointer. | |
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457 void InstanceKlass::initialize(TRAPS) { |
0 | 458 if (this->should_be_initialized()) { |
459 HandleMark hm(THREAD); | |
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460 instanceKlassHandle this_oop(THREAD, this); |
0 | 461 initialize_impl(this_oop, CHECK); |
462 // Note: at this point the class may be initialized | |
463 // OR it may be in the state of being initialized | |
464 // in case of recursive initialization! | |
465 } else { | |
466 assert(is_initialized(), "sanity check"); | |
467 } | |
468 } | |
469 | |
470 | |
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471 bool InstanceKlass::verify_code( |
0 | 472 instanceKlassHandle this_oop, bool throw_verifyerror, TRAPS) { |
473 // 1) Verify the bytecodes | |
474 Verifier::Mode mode = | |
475 throw_verifyerror ? Verifier::ThrowException : Verifier::NoException; | |
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476 return Verifier::verify(this_oop, mode, this_oop->should_verify_class(), CHECK_false); |
0 | 477 } |
478 | |
479 | |
480 // Used exclusively by the shared spaces dump mechanism to prevent | |
481 // classes mapped into the shared regions in new VMs from appearing linked. | |
482 | |
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483 void InstanceKlass::unlink_class() { |
0 | 484 assert(is_linked(), "must be linked"); |
485 _init_state = loaded; | |
486 } | |
487 | |
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488 void InstanceKlass::link_class(TRAPS) { |
0 | 489 assert(is_loaded(), "must be loaded"); |
490 if (!is_linked()) { | |
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491 HandleMark hm(THREAD); |
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492 instanceKlassHandle this_oop(THREAD, this); |
0 | 493 link_class_impl(this_oop, true, CHECK); |
494 } | |
495 } | |
496 | |
497 // Called to verify that a class can link during initialization, without | |
498 // throwing a VerifyError. | |
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499 bool InstanceKlass::link_class_or_fail(TRAPS) { |
0 | 500 assert(is_loaded(), "must be loaded"); |
501 if (!is_linked()) { | |
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502 HandleMark hm(THREAD); |
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503 instanceKlassHandle this_oop(THREAD, this); |
0 | 504 link_class_impl(this_oop, false, CHECK_false); |
505 } | |
506 return is_linked(); | |
507 } | |
508 | |
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509 bool InstanceKlass::link_class_impl( |
0 | 510 instanceKlassHandle this_oop, bool throw_verifyerror, TRAPS) { |
511 // check for error state | |
512 if (this_oop->is_in_error_state()) { | |
513 ResourceMark rm(THREAD); | |
514 THROW_MSG_(vmSymbols::java_lang_NoClassDefFoundError(), | |
515 this_oop->external_name(), false); | |
516 } | |
517 // return if already verified | |
518 if (this_oop->is_linked()) { | |
519 return true; | |
520 } | |
521 | |
522 // Timing | |
523 // timer handles recursion | |
524 assert(THREAD->is_Java_thread(), "non-JavaThread in link_class_impl"); | |
525 JavaThread* jt = (JavaThread*)THREAD; | |
526 | |
527 // link super class before linking this class | |
528 instanceKlassHandle super(THREAD, this_oop->super()); | |
529 if (super.not_null()) { | |
530 if (super->is_interface()) { // check if super class is an interface | |
531 ResourceMark rm(THREAD); | |
532 Exceptions::fthrow( | |
533 THREAD_AND_LOCATION, | |
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534 vmSymbols::java_lang_IncompatibleClassChangeError(), |
0 | 535 "class %s has interface %s as super class", |
536 this_oop->external_name(), | |
537 super->external_name() | |
538 ); | |
539 return false; | |
540 } | |
541 | |
542 link_class_impl(super, throw_verifyerror, CHECK_false); | |
543 } | |
544 | |
545 // link all interfaces implemented by this class before linking this class | |
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546 Array<Klass*>* interfaces = this_oop->local_interfaces(); |
0 | 547 int num_interfaces = interfaces->length(); |
548 for (int index = 0; index < num_interfaces; index++) { | |
549 HandleMark hm(THREAD); | |
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550 instanceKlassHandle ih(THREAD, interfaces->at(index)); |
0 | 551 link_class_impl(ih, throw_verifyerror, CHECK_false); |
552 } | |
553 | |
554 // in case the class is linked in the process of linking its superclasses | |
555 if (this_oop->is_linked()) { | |
556 return true; | |
557 } | |
558 | |
875
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559 // trace only the link time for this klass that includes |
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560 // the verification time |
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561 PerfClassTraceTime vmtimer(ClassLoader::perf_class_link_time(), |
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562 ClassLoader::perf_class_link_selftime(), |
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563 ClassLoader::perf_classes_linked(), |
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564 jt->get_thread_stat()->perf_recursion_counts_addr(), |
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565 jt->get_thread_stat()->perf_timers_addr(), |
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566 PerfClassTraceTime::CLASS_LINK); |
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567 |
0 | 568 // verification & rewriting |
569 { | |
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570 volatile oop init_lock = this_oop->init_lock(); |
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571 ObjectLocker ol(init_lock, THREAD, init_lock != NULL); |
0 | 572 // rewritten will have been set if loader constraint error found |
573 // on an earlier link attempt | |
574 // don't verify or rewrite if already rewritten | |
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575 |
0 | 576 if (!this_oop->is_linked()) { |
577 if (!this_oop->is_rewritten()) { | |
578 { | |
579 // Timer includes any side effects of class verification (resolution, | |
580 // etc), but not recursive entry into verify_code(). | |
875
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581 PerfClassTraceTime timer(ClassLoader::perf_class_verify_time(), |
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582 ClassLoader::perf_class_verify_selftime(), |
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583 ClassLoader::perf_classes_verified(), |
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584 jt->get_thread_stat()->perf_recursion_counts_addr(), |
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585 jt->get_thread_stat()->perf_timers_addr(), |
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586 PerfClassTraceTime::CLASS_VERIFY); |
0 | 587 bool verify_ok = verify_code(this_oop, throw_verifyerror, THREAD); |
588 if (!verify_ok) { | |
589 return false; | |
590 } | |
591 } | |
592 | |
593 // Just in case a side-effect of verify linked this class already | |
594 // (which can sometimes happen since the verifier loads classes | |
595 // using custom class loaders, which are free to initialize things) | |
596 if (this_oop->is_linked()) { | |
597 return true; | |
598 } | |
599 | |
600 // also sets rewritten | |
601 this_oop->rewrite_class(CHECK_false); | |
602 } | |
603 | |
3748 | 604 // relocate jsrs and link methods after they are all rewritten |
605 this_oop->relocate_and_link_methods(CHECK_false); | |
606 | |
0 | 607 // Initialize the vtable and interface table after |
608 // methods have been rewritten since rewrite may | |
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609 // fabricate new Method*s. |
0 | 610 // also does loader constraint checking |
611 if (!this_oop()->is_shared()) { | |
612 ResourceMark rm(THREAD); | |
613 this_oop->vtable()->initialize_vtable(true, CHECK_false); | |
614 this_oop->itable()->initialize_itable(true, CHECK_false); | |
615 } | |
616 #ifdef ASSERT | |
617 else { | |
618 ResourceMark rm(THREAD); | |
619 this_oop->vtable()->verify(tty, true); | |
620 // In case itable verification is ever added. | |
621 // this_oop->itable()->verify(tty, true); | |
622 } | |
623 #endif | |
624 this_oop->set_init_state(linked); | |
625 if (JvmtiExport::should_post_class_prepare()) { | |
626 Thread *thread = THREAD; | |
627 assert(thread->is_Java_thread(), "thread->is_Java_thread()"); | |
628 JvmtiExport::post_class_prepare((JavaThread *) thread, this_oop()); | |
629 } | |
630 } | |
631 } | |
632 return true; | |
633 } | |
634 | |
635 | |
636 // Rewrite the byte codes of all of the methods of a class. | |
637 // The rewriter must be called exactly once. Rewriting must happen after | |
638 // verification but before the first method of the class is executed. | |
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639 void InstanceKlass::rewrite_class(TRAPS) { |
0 | 640 assert(is_loaded(), "must be loaded"); |
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641 instanceKlassHandle this_oop(THREAD, this); |
0 | 642 if (this_oop->is_rewritten()) { |
643 assert(this_oop()->is_shared(), "rewriting an unshared class?"); | |
644 return; | |
645 } | |
3748 | 646 Rewriter::rewrite(this_oop, CHECK); |
0 | 647 this_oop->set_rewritten(); |
648 } | |
649 | |
3748 | 650 // Now relocate and link method entry points after class is rewritten. |
651 // This is outside is_rewritten flag. In case of an exception, it can be | |
652 // executed more than once. | |
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653 void InstanceKlass::relocate_and_link_methods(TRAPS) { |
3748 | 654 assert(is_loaded(), "must be loaded"); |
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655 instanceKlassHandle this_oop(THREAD, this); |
3748 | 656 Rewriter::relocate_and_link(this_oop, CHECK); |
657 } | |
658 | |
0 | 659 |
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660 void InstanceKlass::initialize_impl(instanceKlassHandle this_oop, TRAPS) { |
0 | 661 // Make sure klass is linked (verified) before initialization |
662 // A class could already be verified, since it has been reflected upon. | |
663 this_oop->link_class(CHECK); | |
664 | |
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665 DTRACE_CLASSINIT_PROBE(required, InstanceKlass::cast(this_oop()), -1); |
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666 |
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667 bool wait = false; |
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668 |
0 | 669 // refer to the JVM book page 47 for description of steps |
670 // Step 1 | |
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671 { |
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672 volatile oop init_lock = this_oop->init_lock(); |
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673 ObjectLocker ol(init_lock, THREAD, init_lock != NULL); |
0 | 674 |
675 Thread *self = THREAD; // it's passed the current thread | |
676 | |
677 // Step 2 | |
678 // If we were to use wait() instead of waitInterruptibly() then | |
679 // we might end up throwing IE from link/symbol resolution sites | |
680 // that aren't expected to throw. This would wreak havoc. See 6320309. | |
681 while(this_oop->is_being_initialized() && !this_oop->is_reentrant_initialization(self)) { | |
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682 wait = true; |
0 | 683 ol.waitUninterruptibly(CHECK); |
684 } | |
685 | |
686 // Step 3 | |
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687 if (this_oop->is_being_initialized() && this_oop->is_reentrant_initialization(self)) { |
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688 DTRACE_CLASSINIT_PROBE_WAIT(recursive, InstanceKlass::cast(this_oop()), -1,wait); |
0 | 689 return; |
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690 } |
0 | 691 |
692 // Step 4 | |
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693 if (this_oop->is_initialized()) { |
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694 DTRACE_CLASSINIT_PROBE_WAIT(concurrent, InstanceKlass::cast(this_oop()), -1,wait); |
0 | 695 return; |
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696 } |
0 | 697 |
698 // Step 5 | |
699 if (this_oop->is_in_error_state()) { | |
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700 DTRACE_CLASSINIT_PROBE_WAIT(erroneous, InstanceKlass::cast(this_oop()), -1,wait); |
0 | 701 ResourceMark rm(THREAD); |
702 const char* desc = "Could not initialize class "; | |
703 const char* className = this_oop->external_name(); | |
704 size_t msglen = strlen(desc) + strlen(className) + 1; | |
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705 char* message = NEW_RESOURCE_ARRAY(char, msglen); |
0 | 706 if (NULL == message) { |
707 // Out of memory: can't create detailed error message | |
708 THROW_MSG(vmSymbols::java_lang_NoClassDefFoundError(), className); | |
709 } else { | |
710 jio_snprintf(message, msglen, "%s%s", desc, className); | |
711 THROW_MSG(vmSymbols::java_lang_NoClassDefFoundError(), message); | |
712 } | |
713 } | |
714 | |
715 // Step 6 | |
716 this_oop->set_init_state(being_initialized); | |
717 this_oop->set_init_thread(self); | |
718 } | |
719 | |
720 // Step 7 | |
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721 Klass* super_klass = this_oop->super(); |
6983 | 722 if (super_klass != NULL && !this_oop->is_interface() && super_klass->should_be_initialized()) { |
723 super_klass->initialize(THREAD); | |
0 | 724 |
725 if (HAS_PENDING_EXCEPTION) { | |
726 Handle e(THREAD, PENDING_EXCEPTION); | |
727 CLEAR_PENDING_EXCEPTION; | |
728 { | |
729 EXCEPTION_MARK; | |
730 this_oop->set_initialization_state_and_notify(initialization_error, THREAD); // Locks object, set state, and notify all waiting threads | |
731 CLEAR_PENDING_EXCEPTION; // ignore any exception thrown, superclass initialization error is thrown below | |
732 } | |
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733 DTRACE_CLASSINIT_PROBE_WAIT(super__failed, InstanceKlass::cast(this_oop()), -1,wait); |
0 | 734 THROW_OOP(e()); |
735 } | |
736 } | |
737 | |
6934 | 738 if (this_oop->has_default_methods()) { |
739 // Step 7.5: initialize any interfaces which have default methods | |
740 for (int i = 0; i < this_oop->local_interfaces()->length(); ++i) { | |
741 Klass* iface = this_oop->local_interfaces()->at(i); | |
742 InstanceKlass* ik = InstanceKlass::cast(iface); | |
743 if (ik->has_default_methods() && ik->should_be_initialized()) { | |
744 ik->initialize(THREAD); | |
745 | |
746 if (HAS_PENDING_EXCEPTION) { | |
747 Handle e(THREAD, PENDING_EXCEPTION); | |
748 CLEAR_PENDING_EXCEPTION; | |
749 { | |
750 EXCEPTION_MARK; | |
751 // Locks object, set state, and notify all waiting threads | |
752 this_oop->set_initialization_state_and_notify( | |
753 initialization_error, THREAD); | |
754 | |
755 // ignore any exception thrown, superclass initialization error is | |
756 // thrown below | |
757 CLEAR_PENDING_EXCEPTION; | |
758 } | |
759 DTRACE_CLASSINIT_PROBE_WAIT( | |
760 super__failed, InstanceKlass::cast(this_oop()), -1, wait); | |
761 THROW_OOP(e()); | |
762 } | |
763 } | |
764 } | |
765 } | |
766 | |
0 | 767 // Step 8 |
768 { | |
769 assert(THREAD->is_Java_thread(), "non-JavaThread in initialize_impl"); | |
770 JavaThread* jt = (JavaThread*)THREAD; | |
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771 DTRACE_CLASSINIT_PROBE_WAIT(clinit, InstanceKlass::cast(this_oop()), -1,wait); |
0 | 772 // Timer includes any side effects of class initialization (resolution, |
773 // etc), but not recursive entry into call_class_initializer(). | |
875
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774 PerfClassTraceTime timer(ClassLoader::perf_class_init_time(), |
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775 ClassLoader::perf_class_init_selftime(), |
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776 ClassLoader::perf_classes_inited(), |
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777 jt->get_thread_stat()->perf_recursion_counts_addr(), |
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778 jt->get_thread_stat()->perf_timers_addr(), |
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779 PerfClassTraceTime::CLASS_CLINIT); |
0 | 780 this_oop->call_class_initializer(THREAD); |
781 } | |
782 | |
783 // Step 9 | |
784 if (!HAS_PENDING_EXCEPTION) { | |
785 this_oop->set_initialization_state_and_notify(fully_initialized, CHECK); | |
786 { ResourceMark rm(THREAD); | |
787 debug_only(this_oop->vtable()->verify(tty, true);) | |
788 } | |
789 } | |
790 else { | |
791 // Step 10 and 11 | |
792 Handle e(THREAD, PENDING_EXCEPTION); | |
793 CLEAR_PENDING_EXCEPTION; | |
794 { | |
795 EXCEPTION_MARK; | |
796 this_oop->set_initialization_state_and_notify(initialization_error, THREAD); | |
797 CLEAR_PENDING_EXCEPTION; // ignore any exception thrown, class initialization error is thrown below | |
798 } | |
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799 DTRACE_CLASSINIT_PROBE_WAIT(error, InstanceKlass::cast(this_oop()), -1,wait); |
1142 | 800 if (e->is_a(SystemDictionary::Error_klass())) { |
0 | 801 THROW_OOP(e()); |
802 } else { | |
803 JavaCallArguments args(e); | |
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804 THROW_ARG(vmSymbols::java_lang_ExceptionInInitializerError(), |
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805 vmSymbols::throwable_void_signature(), |
0 | 806 &args); |
807 } | |
808 } | |
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809 DTRACE_CLASSINIT_PROBE_WAIT(end, InstanceKlass::cast(this_oop()), -1,wait); |
0 | 810 } |
811 | |
812 | |
813 // Note: implementation moved to static method to expose the this pointer. | |
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814 void InstanceKlass::set_initialization_state_and_notify(ClassState state, TRAPS) { |
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815 instanceKlassHandle kh(THREAD, this); |
0 | 816 set_initialization_state_and_notify_impl(kh, state, CHECK); |
817 } | |
818 | |
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819 void InstanceKlass::set_initialization_state_and_notify_impl(instanceKlassHandle this_oop, ClassState state, TRAPS) { |
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820 volatile oop init_lock = this_oop->init_lock(); |
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821 ObjectLocker ol(init_lock, THREAD, init_lock != NULL); |
0 | 822 this_oop->set_init_state(state); |
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823 this_oop->fence_and_clear_init_lock(); |
0 | 824 ol.notify_all(CHECK); |
825 } | |
826 | |
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827 // The embedded _implementor field can only record one implementor. |
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828 // When there are more than one implementors, the _implementor field |
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829 // is set to the interface Klass* itself. Following are the possible |
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830 // values for the _implementor field: |
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831 // NULL - no implementor |
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832 // implementor Klass* - one implementor |
5998
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833 // self - more than one implementor |
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834 // |
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835 // The _implementor field only exists for interfaces. |
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836 void InstanceKlass::add_implementor(Klass* k) { |
0 | 837 assert(Compile_lock->owned_by_self(), ""); |
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838 assert(is_interface(), "not interface"); |
0 | 839 // Filter out my subinterfaces. |
840 // (Note: Interfaces are never on the subklass list.) | |
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841 if (InstanceKlass::cast(k)->is_interface()) return; |
0 | 842 |
843 // Filter out subclasses whose supers already implement me. | |
844 // (Note: CHA must walk subclasses of direct implementors | |
845 // in order to locate indirect implementors.) | |
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846 Klass* sk = InstanceKlass::cast(k)->super(); |
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847 if (sk != NULL && InstanceKlass::cast(sk)->implements_interface(this)) |
0 | 848 // We only need to check one immediate superclass, since the |
849 // implements_interface query looks at transitive_interfaces. | |
850 // Any supers of the super have the same (or fewer) transitive_interfaces. | |
851 return; | |
852 | |
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853 Klass* ik = implementor(); |
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854 if (ik == NULL) { |
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855 set_implementor(k); |
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856 } else if (ik != this) { |
5998
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857 // There is already an implementor. Use itself as an indicator of |
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858 // more than one implementors. |
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859 set_implementor(this); |
0 | 860 } |
861 | |
862 // The implementor also implements the transitive_interfaces | |
863 for (int index = 0; index < local_interfaces()->length(); index++) { | |
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864 InstanceKlass::cast(local_interfaces()->at(index))->add_implementor(k); |
0 | 865 } |
866 } | |
867 | |
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868 void InstanceKlass::init_implementor() { |
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869 if (is_interface()) { |
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870 set_implementor(NULL); |
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871 } |
0 | 872 } |
873 | |
874 | |
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875 void InstanceKlass::process_interfaces(Thread *thread) { |
0 | 876 // link this class into the implementors list of every interface it implements |
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877 Klass* this_as_klass_oop = this; |
0 | 878 for (int i = local_interfaces()->length() - 1; i >= 0; i--) { |
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879 assert(local_interfaces()->at(i)->is_klass(), "must be a klass"); |
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880 InstanceKlass* interf = InstanceKlass::cast(local_interfaces()->at(i)); |
0 | 881 assert(interf->is_interface(), "expected interface"); |
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882 interf->add_implementor(this_as_klass_oop); |
0 | 883 } |
884 } | |
885 | |
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886 bool InstanceKlass::can_be_primary_super_slow() const { |
0 | 887 if (is_interface()) |
888 return false; | |
889 else | |
890 return Klass::can_be_primary_super_slow(); | |
891 } | |
892 | |
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893 GrowableArray<Klass*>* InstanceKlass::compute_secondary_supers(int num_extra_slots) { |
0 | 894 // The secondaries are the implemented interfaces. |
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895 InstanceKlass* ik = InstanceKlass::cast(this); |
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896 Array<Klass*>* interfaces = ik->transitive_interfaces(); |
0 | 897 int num_secondaries = num_extra_slots + interfaces->length(); |
898 if (num_secondaries == 0) { | |
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899 // Must share this for correct bootstrapping! |
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900 set_secondary_supers(Universe::the_empty_klass_array()); |
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901 return NULL; |
0 | 902 } else if (num_extra_slots == 0) { |
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903 // The secondary super list is exactly the same as the transitive interfaces. |
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904 // Redefine classes has to be careful not to delete this! |
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905 set_secondary_supers(interfaces); |
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906 return NULL; |
0 | 907 } else { |
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908 // Copy transitive interfaces to a temporary growable array to be constructed |
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909 // into the secondary super list with extra slots. |
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910 GrowableArray<Klass*>* secondaries = new GrowableArray<Klass*>(interfaces->length()); |
0 | 911 for (int i = 0; i < interfaces->length(); i++) { |
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912 secondaries->push(interfaces->at(i)); |
0 | 913 } |
914 return secondaries; | |
915 } | |
916 } | |
917 | |
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918 bool InstanceKlass::compute_is_subtype_of(Klass* k) { |
6983 | 919 if (k->is_interface()) { |
0 | 920 return implements_interface(k); |
921 } else { | |
922 return Klass::compute_is_subtype_of(k); | |
923 } | |
924 } | |
925 | |
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926 bool InstanceKlass::implements_interface(Klass* k) const { |
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927 if (this == k) return true; |
6983 | 928 assert(k->is_interface(), "should be an interface class"); |
0 | 929 for (int i = 0; i < transitive_interfaces()->length(); i++) { |
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930 if (transitive_interfaces()->at(i) == k) { |
0 | 931 return true; |
932 } | |
933 } | |
934 return false; | |
935 } | |
936 | |
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937 objArrayOop InstanceKlass::allocate_objArray(int n, int length, TRAPS) { |
0 | 938 if (length < 0) THROW_0(vmSymbols::java_lang_NegativeArraySizeException()); |
939 if (length > arrayOopDesc::max_array_length(T_OBJECT)) { | |
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940 report_java_out_of_memory("Requested array size exceeds VM limit"); |
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941 JvmtiExport::post_array_size_exhausted(); |
0 | 942 THROW_OOP_0(Universe::out_of_memory_error_array_size()); |
943 } | |
944 int size = objArrayOopDesc::object_size(length); | |
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945 Klass* ak = array_klass(n, CHECK_NULL); |
0 | 946 KlassHandle h_ak (THREAD, ak); |
947 objArrayOop o = | |
948 (objArrayOop)CollectedHeap::array_allocate(h_ak, size, length, CHECK_NULL); | |
949 return o; | |
950 } | |
951 | |
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952 instanceOop InstanceKlass::register_finalizer(instanceOop i, TRAPS) { |
0 | 953 if (TraceFinalizerRegistration) { |
954 tty->print("Registered "); | |
955 i->print_value_on(tty); | |
956 tty->print_cr(" (" INTPTR_FORMAT ") as finalizable", (address)i); | |
957 } | |
958 instanceHandle h_i(THREAD, i); | |
959 // Pass the handle as argument, JavaCalls::call expects oop as jobjects | |
960 JavaValue result(T_VOID); | |
961 JavaCallArguments args(h_i); | |
962 methodHandle mh (THREAD, Universe::finalizer_register_method()); | |
963 JavaCalls::call(&result, mh, &args, CHECK_NULL); | |
964 return h_i(); | |
965 } | |
966 | |
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967 instanceOop InstanceKlass::allocate_instance(TRAPS) { |
0 | 968 bool has_finalizer_flag = has_finalizer(); // Query before possible GC |
969 int size = size_helper(); // Query before forming handle. | |
970 | |
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971 KlassHandle h_k(THREAD, this); |
0 | 972 |
973 instanceOop i; | |
974 | |
975 i = (instanceOop)CollectedHeap::obj_allocate(h_k, size, CHECK_NULL); | |
976 if (has_finalizer_flag && !RegisterFinalizersAtInit) { | |
977 i = register_finalizer(i, CHECK_NULL); | |
978 } | |
979 return i; | |
980 } | |
981 | |
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982 void InstanceKlass::check_valid_for_instantiation(bool throwError, TRAPS) { |
0 | 983 if (is_interface() || is_abstract()) { |
984 ResourceMark rm(THREAD); | |
985 THROW_MSG(throwError ? vmSymbols::java_lang_InstantiationError() | |
986 : vmSymbols::java_lang_InstantiationException(), external_name()); | |
987 } | |
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988 if (this == SystemDictionary::Class_klass()) { |
0 | 989 ResourceMark rm(THREAD); |
990 THROW_MSG(throwError ? vmSymbols::java_lang_IllegalAccessError() | |
991 : vmSymbols::java_lang_IllegalAccessException(), external_name()); | |
992 } | |
993 } | |
994 | |
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995 Klass* InstanceKlass::array_klass_impl(bool or_null, int n, TRAPS) { |
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996 instanceKlassHandle this_oop(THREAD, this); |
0 | 997 return array_klass_impl(this_oop, or_null, n, THREAD); |
998 } | |
999 | |
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1000 Klass* InstanceKlass::array_klass_impl(instanceKlassHandle this_oop, bool or_null, int n, TRAPS) { |
0 | 1001 if (this_oop->array_klasses() == NULL) { |
1002 if (or_null) return NULL; | |
1003 | |
1004 ResourceMark rm; | |
1005 JavaThread *jt = (JavaThread *)THREAD; | |
1006 { | |
1007 // Atomic creation of array_klasses | |
1008 MutexLocker mc(Compile_lock, THREAD); // for vtables | |
1009 MutexLocker ma(MultiArray_lock, THREAD); | |
1010 | |
1011 // Check if update has already taken place | |
1012 if (this_oop->array_klasses() == NULL) { | |
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1013 Klass* k = ObjArrayKlass::allocate_objArray_klass(this_oop->class_loader_data(), 1, this_oop, CHECK_NULL); |
0 | 1014 this_oop->set_array_klasses(k); |
1015 } | |
1016 } | |
1017 } | |
1018 // _this will always be set at this point | |
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1019 ObjArrayKlass* oak = (ObjArrayKlass*)this_oop->array_klasses(); |
0 | 1020 if (or_null) { |
1021 return oak->array_klass_or_null(n); | |
1022 } | |
1023 return oak->array_klass(n, CHECK_NULL); | |
1024 } | |
1025 | |
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1026 Klass* InstanceKlass::array_klass_impl(bool or_null, TRAPS) { |
0 | 1027 return array_klass_impl(or_null, 1, THREAD); |
1028 } | |
1029 | |
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1030 void InstanceKlass::call_class_initializer(TRAPS) { |
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1031 instanceKlassHandle ik (THREAD, this); |
0 | 1032 call_class_initializer_impl(ik, THREAD); |
1033 } | |
1034 | |
1035 static int call_class_initializer_impl_counter = 0; // for debugging | |
1036 | |
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1037 Method* InstanceKlass::class_initializer() { |
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1038 Method* clinit = find_method( |
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1039 vmSymbols::class_initializer_name(), vmSymbols::void_method_signature()); |
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1040 if (clinit != NULL && clinit->has_valid_initializer_flags()) { |
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1041 return clinit; |
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1042 } |
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1043 return NULL; |
0 | 1044 } |
1045 | |
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1046 void InstanceKlass::call_class_initializer_impl(instanceKlassHandle this_oop, TRAPS) { |
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1047 if (ReplayCompiles && |
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1048 (ReplaySuppressInitializers == 1 || |
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1049 ReplaySuppressInitializers >= 2 && this_oop->class_loader() != NULL)) { |
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1050 // Hide the existence of the initializer for the purpose of replaying the compile |
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1051 return; |
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1052 } |
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1053 |
0 | 1054 methodHandle h_method(THREAD, this_oop->class_initializer()); |
1055 assert(!this_oop->is_initialized(), "we cannot initialize twice"); | |
1056 if (TraceClassInitialization) { | |
1057 tty->print("%d Initializing ", call_class_initializer_impl_counter++); | |
1058 this_oop->name()->print_value(); | |
1059 tty->print_cr("%s (" INTPTR_FORMAT ")", h_method() == NULL ? "(no method)" : "", (address)this_oop()); | |
1060 } | |
1061 if (h_method() != NULL) { | |
1062 JavaCallArguments args; // No arguments | |
1063 JavaValue result(T_VOID); | |
1064 JavaCalls::call(&result, h_method, &args, CHECK); // Static call (no args) | |
1065 } | |
1066 } | |
1067 | |
1068 | |
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1069 void InstanceKlass::mask_for(methodHandle method, int bci, |
0 | 1070 InterpreterOopMap* entry_for) { |
1071 // Dirty read, then double-check under a lock. | |
1072 if (_oop_map_cache == NULL) { | |
1073 // Otherwise, allocate a new one. | |
1074 MutexLocker x(OopMapCacheAlloc_lock); | |
1075 // First time use. Allocate a cache in C heap | |
1076 if (_oop_map_cache == NULL) { | |
1077 _oop_map_cache = new OopMapCache(); | |
1078 } | |
1079 } | |
1080 // _oop_map_cache is constant after init; lookup below does is own locking. | |
1081 _oop_map_cache->lookup(method, bci, entry_for); | |
1082 } | |
1083 | |
1084 | |
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1085 bool InstanceKlass::find_local_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const { |
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1086 for (JavaFieldStream fs(this); !fs.done(); fs.next()) { |
3938 | 1087 Symbol* f_name = fs.name(); |
1088 Symbol* f_sig = fs.signature(); | |
0 | 1089 if (f_name == name && f_sig == sig) { |
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1090 fd->initialize(const_cast<InstanceKlass*>(this), fs.index()); |
0 | 1091 return true; |
1092 } | |
1093 } | |
1094 return false; | |
1095 } | |
1096 | |
1097 | |
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1098 Klass* InstanceKlass::find_interface_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const { |
0 | 1099 const int n = local_interfaces()->length(); |
1100 for (int i = 0; i < n; i++) { | |
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1101 Klass* intf1 = local_interfaces()->at(i); |
6983 | 1102 assert(intf1->is_interface(), "just checking type"); |
0 | 1103 // search for field in current interface |
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1104 if (InstanceKlass::cast(intf1)->find_local_field(name, sig, fd)) { |
0 | 1105 assert(fd->is_static(), "interface field must be static"); |
1106 return intf1; | |
1107 } | |
1108 // search for field in direct superinterfaces | |
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1109 Klass* intf2 = InstanceKlass::cast(intf1)->find_interface_field(name, sig, fd); |
0 | 1110 if (intf2 != NULL) return intf2; |
1111 } | |
1112 // otherwise field lookup fails | |
1113 return NULL; | |
1114 } | |
1115 | |
1116 | |
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1117 Klass* InstanceKlass::find_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const { |
0 | 1118 // search order according to newest JVM spec (5.4.3.2, p.167). |
1119 // 1) search for field in current klass | |
1120 if (find_local_field(name, sig, fd)) { | |
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1121 return const_cast<InstanceKlass*>(this); |
0 | 1122 } |
1123 // 2) search for field recursively in direct superinterfaces | |
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1124 { Klass* intf = find_interface_field(name, sig, fd); |
0 | 1125 if (intf != NULL) return intf; |
1126 } | |
1127 // 3) apply field lookup recursively if superclass exists | |
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1128 { Klass* supr = super(); |
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1129 if (supr != NULL) return InstanceKlass::cast(supr)->find_field(name, sig, fd); |
0 | 1130 } |
1131 // 4) otherwise field lookup fails | |
1132 return NULL; | |
1133 } | |
1134 | |
1135 | |
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1136 Klass* InstanceKlass::find_field(Symbol* name, Symbol* sig, bool is_static, fieldDescriptor* fd) const { |
0 | 1137 // search order according to newest JVM spec (5.4.3.2, p.167). |
1138 // 1) search for field in current klass | |
1139 if (find_local_field(name, sig, fd)) { | |
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1140 if (fd->is_static() == is_static) return const_cast<InstanceKlass*>(this); |
0 | 1141 } |
1142 // 2) search for field recursively in direct superinterfaces | |
1143 if (is_static) { | |
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1144 Klass* intf = find_interface_field(name, sig, fd); |
0 | 1145 if (intf != NULL) return intf; |
1146 } | |
1147 // 3) apply field lookup recursively if superclass exists | |
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1148 { Klass* supr = super(); |
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1149 if (supr != NULL) return InstanceKlass::cast(supr)->find_field(name, sig, is_static, fd); |
0 | 1150 } |
1151 // 4) otherwise field lookup fails | |
1152 return NULL; | |
1153 } | |
1154 | |
1155 | |
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1156 bool InstanceKlass::find_local_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const { |
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1157 for (JavaFieldStream fs(this); !fs.done(); fs.next()) { |
3938 | 1158 if (fs.offset() == offset) { |
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1159 fd->initialize(const_cast<InstanceKlass*>(this), fs.index()); |
0 | 1160 if (fd->is_static() == is_static) return true; |
1161 } | |
1162 } | |
1163 return false; | |
1164 } | |
1165 | |
1166 | |
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1167 bool InstanceKlass::find_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const { |
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1168 Klass* klass = const_cast<InstanceKlass*>(this); |
0 | 1169 while (klass != NULL) { |
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1170 if (InstanceKlass::cast(klass)->find_local_field_from_offset(offset, is_static, fd)) { |
0 | 1171 return true; |
1172 } | |
6983 | 1173 klass = klass->super(); |
0 | 1174 } |
1175 return false; | |
1176 } | |
1177 | |
1178 | |
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1179 void InstanceKlass::methods_do(void f(Method* method)) { |
0 | 1180 int len = methods()->length(); |
1181 for (int index = 0; index < len; index++) { | |
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1182 Method* m = methods()->at(index); |
0 | 1183 assert(m->is_method(), "must be method"); |
1184 f(m); | |
1185 } | |
1186 } | |
1187 | |
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1188 |
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1189 void InstanceKlass::do_local_static_fields(FieldClosure* cl) { |
3938 | 1190 for (JavaFieldStream fs(this); !fs.done(); fs.next()) { |
1191 if (fs.access_flags().is_static()) { | |
1192 fieldDescriptor fd; | |
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1193 fd.initialize(this, fs.index()); |
3938 | 1194 cl->do_field(&fd); |
1195 } | |
0 | 1196 } |
1197 } | |
1198 | |
1199 | |
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1200 void InstanceKlass::do_local_static_fields(void f(fieldDescriptor*, TRAPS), TRAPS) { |
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1201 instanceKlassHandle h_this(THREAD, this); |
0 | 1202 do_local_static_fields_impl(h_this, f, CHECK); |
1203 } | |
1204 | |
1205 | |
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1206 void InstanceKlass::do_local_static_fields_impl(instanceKlassHandle this_oop, void f(fieldDescriptor* fd, TRAPS), TRAPS) { |
3938 | 1207 for (JavaFieldStream fs(this_oop()); !fs.done(); fs.next()) { |
1208 if (fs.access_flags().is_static()) { | |
1209 fieldDescriptor fd; | |
1210 fd.initialize(this_oop(), fs.index()); | |
1211 f(&fd, CHECK); | |
1212 } | |
0 | 1213 } |
1214 } | |
1215 | |
1216 | |
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1217 static int compare_fields_by_offset(int* a, int* b) { |
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1218 return a[0] - b[0]; |
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1219 } |
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1220 |
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1221 void InstanceKlass::do_nonstatic_fields(FieldClosure* cl) { |
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1222 InstanceKlass* super = superklass(); |
0 | 1223 if (super != NULL) { |
1224 super->do_nonstatic_fields(cl); | |
1225 } | |
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1226 fieldDescriptor fd; |
3938 | 1227 int length = java_fields_count(); |
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1228 // In DebugInfo nonstatic fields are sorted by offset. |
6197 | 1229 int* fields_sorted = NEW_C_HEAP_ARRAY(int, 2*(length+1), mtClass); |
44
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1230 int j = 0; |
3938 | 1231 for (int i = 0; i < length; i += 1) { |
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1232 fd.initialize(this, i); |
44
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1233 if (!fd.is_static()) { |
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1234 fields_sorted[j + 0] = fd.offset(); |
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1235 fields_sorted[j + 1] = i; |
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1236 j += 2; |
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1237 } |
0 | 1238 } |
44
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1239 if (j > 0) { |
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1240 length = j; |
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1241 // _sort_Fn is defined in growableArray.hpp. |
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1242 qsort(fields_sorted, length/2, 2*sizeof(int), (_sort_Fn)compare_fields_by_offset); |
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1243 for (int i = 0; i < length; i += 2) { |
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1244 fd.initialize(this, fields_sorted[i + 1]); |
44
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1245 assert(!fd.is_static() && fd.offset() == fields_sorted[i], "only nonstatic fields"); |
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1246 cl->do_field(&fd); |
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1247 } |
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1248 } |
6197 | 1249 FREE_C_HEAP_ARRAY(int, fields_sorted, mtClass); |
0 | 1250 } |
1251 | |
1252 | |
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1253 void InstanceKlass::array_klasses_do(void f(Klass* k, TRAPS), TRAPS) { |
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1254 if (array_klasses() != NULL) |
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1255 ArrayKlass::cast(array_klasses())->array_klasses_do(f, THREAD); |
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1256 } |
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1257 |
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1258 void InstanceKlass::array_klasses_do(void f(Klass* k)) { |
0 | 1259 if (array_klasses() != NULL) |
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1260 ArrayKlass::cast(array_klasses())->array_klasses_do(f); |
0 | 1261 } |
1262 | |
1263 | |
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1264 void InstanceKlass::with_array_klasses_do(void f(Klass* k)) { |
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1265 f(this); |
0 | 1266 array_klasses_do(f); |
1267 } | |
1268 | |
1269 #ifdef ASSERT | |
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1270 static int linear_search(Array<Method*>* methods, Symbol* name, Symbol* signature) { |
0 | 1271 int len = methods->length(); |
1272 for (int index = 0; index < len; index++) { | |
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1273 Method* m = methods->at(index); |
0 | 1274 assert(m->is_method(), "must be method"); |
1275 if (m->signature() == signature && m->name() == name) { | |
1276 return index; | |
1277 } | |
1278 } | |
1279 return -1; | |
1280 } | |
1281 #endif | |
1282 | |
6934 | 1283 static int binary_search(Array<Method*>* methods, Symbol* name) { |
0 | 1284 int len = methods->length(); |
1285 // methods are sorted, so do binary search | |
1286 int l = 0; | |
1287 int h = len - 1; | |
1288 while (l <= h) { | |
1289 int mid = (l + h) >> 1; | |
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1290 Method* m = methods->at(mid); |
0 | 1291 assert(m->is_method(), "must be method"); |
1292 int res = m->name()->fast_compare(name); | |
1293 if (res == 0) { | |
6934 | 1294 return mid; |
0 | 1295 } else if (res < 0) { |
1296 l = mid + 1; | |
1297 } else { | |
1298 h = mid - 1; | |
1299 } | |
1300 } | |
6934 | 1301 return -1; |
1302 } | |
1303 | |
1304 Method* InstanceKlass::find_method(Symbol* name, Symbol* signature) const { | |
1305 return InstanceKlass::find_method(methods(), name, signature); | |
1306 } | |
1307 | |
1308 Method* InstanceKlass::find_method( | |
1309 Array<Method*>* methods, Symbol* name, Symbol* signature) { | |
1310 int hit = binary_search(methods, name); | |
1311 if (hit != -1) { | |
1312 Method* m = methods->at(hit); | |
1313 // Do linear search to find matching signature. First, quick check | |
1314 // for common case | |
1315 if (m->signature() == signature) return m; | |
1316 // search downwards through overloaded methods | |
1317 int i; | |
1318 for (i = hit - 1; i >= 0; --i) { | |
1319 Method* m = methods->at(i); | |
1320 assert(m->is_method(), "must be method"); | |
1321 if (m->name() != name) break; | |
1322 if (m->signature() == signature) return m; | |
1323 } | |
1324 // search upwards | |
1325 for (i = hit + 1; i < methods->length(); ++i) { | |
1326 Method* m = methods->at(i); | |
1327 assert(m->is_method(), "must be method"); | |
1328 if (m->name() != name) break; | |
1329 if (m->signature() == signature) return m; | |
1330 } | |
1331 // not found | |
0 | 1332 #ifdef ASSERT |
6934 | 1333 int index = linear_search(methods, name, signature); |
1334 assert(index == -1, err_msg("binary search should have found entry %d", index)); | |
0 | 1335 #endif |
6934 | 1336 } |
0 | 1337 return NULL; |
1338 } | |
1339 | |
6934 | 1340 int InstanceKlass::find_method_by_name(Symbol* name, int* end) { |
1341 return find_method_by_name(methods(), name, end); | |
1342 } | |
1343 | |
1344 int InstanceKlass::find_method_by_name( | |
1345 Array<Method*>* methods, Symbol* name, int* end_ptr) { | |
1346 assert(end_ptr != NULL, "just checking"); | |
1347 int start = binary_search(methods, name); | |
1348 int end = start + 1; | |
1349 if (start != -1) { | |
1350 while (start - 1 >= 0 && (methods->at(start - 1))->name() == name) --start; | |
1351 while (end < methods->length() && (methods->at(end))->name() == name) ++end; | |
1352 *end_ptr = end; | |
1353 return start; | |
1354 } | |
1355 return -1; | |
1356 } | |
1357 | |
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1358 Method* InstanceKlass::uncached_lookup_method(Symbol* name, Symbol* signature) const { |
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1359 Klass* klass = const_cast<InstanceKlass*>(this); |
0 | 1360 while (klass != NULL) { |
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1361 Method* method = InstanceKlass::cast(klass)->find_method(name, signature); |
0 | 1362 if (method != NULL) return method; |
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1363 klass = InstanceKlass::cast(klass)->super(); |
0 | 1364 } |
1365 return NULL; | |
1366 } | |
1367 | |
1368 // lookup a method in all the interfaces that this class implements | |
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1369 Method* InstanceKlass::lookup_method_in_all_interfaces(Symbol* name, |
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1370 Symbol* signature) const { |
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1371 Array<Klass*>* all_ifs = transitive_interfaces(); |
0 | 1372 int num_ifs = all_ifs->length(); |
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1373 InstanceKlass *ik = NULL; |
0 | 1374 for (int i = 0; i < num_ifs; i++) { |
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1375 ik = InstanceKlass::cast(all_ifs->at(i)); |
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1376 Method* m = ik->lookup_method(name, signature); |
0 | 1377 if (m != NULL) { |
1378 return m; | |
1379 } | |
1380 } | |
1381 return NULL; | |
1382 } | |
1383 | |
1384 /* jni_id_for_impl for jfieldIds only */ | |
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1385 JNIid* InstanceKlass::jni_id_for_impl(instanceKlassHandle this_oop, int offset) { |
0 | 1386 MutexLocker ml(JfieldIdCreation_lock); |
1387 // Retry lookup after we got the lock | |
1388 JNIid* probe = this_oop->jni_ids() == NULL ? NULL : this_oop->jni_ids()->find(offset); | |
1389 if (probe == NULL) { | |
1390 // Slow case, allocate new static field identifier | |
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1391 probe = new JNIid(this_oop(), offset, this_oop->jni_ids()); |
0 | 1392 this_oop->set_jni_ids(probe); |
1393 } | |
1394 return probe; | |
1395 } | |
1396 | |
1397 | |
1398 /* jni_id_for for jfieldIds only */ | |
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1399 JNIid* InstanceKlass::jni_id_for(int offset) { |
0 | 1400 JNIid* probe = jni_ids() == NULL ? NULL : jni_ids()->find(offset); |
1401 if (probe == NULL) { | |
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1402 probe = jni_id_for_impl(this, offset); |
0 | 1403 } |
1404 return probe; | |
1405 } | |
1406 | |
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1407 u2 InstanceKlass::enclosing_method_data(int offset) { |
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1408 Array<jushort>* inner_class_list = inner_classes(); |
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1409 if (inner_class_list == NULL) { |
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1410 return 0; |
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1411 } |
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1412 int length = inner_class_list->length(); |
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1413 if (length % inner_class_next_offset == 0) { |
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1414 return 0; |
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1415 } else { |
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1416 int index = length - enclosing_method_attribute_size; |
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1417 assert(offset < enclosing_method_attribute_size, "invalid offset"); |
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1418 return inner_class_list->at(index + offset); |
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1419 } |
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1420 } |
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1421 |
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1422 void InstanceKlass::set_enclosing_method_indices(u2 class_index, |
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1423 u2 method_index) { |
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1424 Array<jushort>* inner_class_list = inner_classes(); |
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1425 assert (inner_class_list != NULL, "_inner_classes list is not set up"); |
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1426 int length = inner_class_list->length(); |
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1427 if (length % inner_class_next_offset == enclosing_method_attribute_size) { |
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1428 int index = length - enclosing_method_attribute_size; |
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1429 inner_class_list->at_put( |
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1430 index + enclosing_method_class_index_offset, class_index); |
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1431 inner_class_list->at_put( |
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1432 index + enclosing_method_method_index_offset, method_index); |
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1433 } |
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1434 } |
0 | 1435 |
1436 // Lookup or create a jmethodID. | |
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1437 // This code is called by the VMThread and JavaThreads so the |
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1438 // locking has to be done very carefully to avoid deadlocks |
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1439 // and/or other cache consistency problems. |
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1440 // |
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1441 jmethodID InstanceKlass::get_jmethod_id(instanceKlassHandle ik_h, methodHandle method_h) { |
0 | 1442 size_t idnum = (size_t)method_h->method_idnum(); |
1443 jmethodID* jmeths = ik_h->methods_jmethod_ids_acquire(); | |
1444 size_t length = 0; | |
1445 jmethodID id = NULL; | |
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1446 |
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1447 // We use a double-check locking idiom here because this cache is |
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1448 // performance sensitive. In the normal system, this cache only |
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1449 // transitions from NULL to non-NULL which is safe because we use |
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1450 // release_set_methods_jmethod_ids() to advertise the new cache. |
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1451 // A partially constructed cache should never be seen by a racing |
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1452 // thread. We also use release_store_ptr() to save a new jmethodID |
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1453 // in the cache so a partially constructed jmethodID should never be |
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1454 // seen either. Cache reads of existing jmethodIDs proceed without a |
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1455 // lock, but cache writes of a new jmethodID requires uniqueness and |
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1456 // creation of the cache itself requires no leaks so a lock is |
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1457 // generally acquired in those two cases. |
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1458 // |
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1459 // If the RedefineClasses() API has been used, then this cache can |
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1460 // grow and we'll have transitions from non-NULL to bigger non-NULL. |
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1461 // Cache creation requires no leaks and we require safety between all |
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1462 // cache accesses and freeing of the old cache so a lock is generally |
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1463 // acquired when the RedefineClasses() API has been used. |
0 | 1464 |
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1465 if (jmeths != NULL) { |
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1466 // the cache already exists |
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1467 if (!ik_h->idnum_can_increment()) { |
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1468 // the cache can't grow so we can just get the current values |
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1469 get_jmethod_id_length_value(jmeths, idnum, &length, &id); |
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1470 } else { |
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1471 // cache can grow so we have to be more careful |
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1472 if (Threads::number_of_threads() == 0 || |
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1473 SafepointSynchronize::is_at_safepoint()) { |
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1474 // we're single threaded or at a safepoint - no locking needed |
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1475 get_jmethod_id_length_value(jmeths, idnum, &length, &id); |
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1476 } else { |
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1477 MutexLocker ml(JmethodIdCreation_lock); |
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1478 get_jmethod_id_length_value(jmeths, idnum, &length, &id); |
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1479 } |
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1480 } |
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1481 } |
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1482 // implied else: |
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1483 // we need to allocate a cache so default length and id values are good |
0 | 1484 |
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1485 if (jmeths == NULL || // no cache yet |
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1486 length <= idnum || // cache is too short |
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1487 id == NULL) { // cache doesn't contain entry |
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1488 |
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1489 // This function can be called by the VMThread so we have to do all |
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1490 // things that might block on a safepoint before grabbing the lock. |
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1491 // Otherwise, we can deadlock with the VMThread or have a cache |
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1492 // consistency issue. These vars keep track of what we might have |
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1493 // to free after the lock is dropped. |
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1494 jmethodID to_dealloc_id = NULL; |
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1495 jmethodID* to_dealloc_jmeths = NULL; |
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1496 |
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1497 // may not allocate new_jmeths or use it if we allocate it |
0 | 1498 jmethodID* new_jmeths = NULL; |
1499 if (length <= idnum) { | |
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1500 // allocate a new cache that might be used |
0 | 1501 size_t size = MAX2(idnum+1, (size_t)ik_h->idnum_allocated_count()); |
6197 | 1502 new_jmeths = NEW_C_HEAP_ARRAY(jmethodID, size+1, mtClass); |
0 | 1503 memset(new_jmeths, 0, (size+1)*sizeof(jmethodID)); |
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1504 // cache size is stored in element[0], other elements offset by one |
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1505 new_jmeths[0] = (jmethodID)size; |
0 | 1506 } |
1507 | |
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1508 // allocate a new jmethodID that might be used |
0 | 1509 jmethodID new_id = NULL; |
1510 if (method_h->is_old() && !method_h->is_obsolete()) { | |
1511 // The method passed in is old (but not obsolete), we need to use the current version | |
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1512 Method* current_method = ik_h->method_with_idnum((int)idnum); |
0 | 1513 assert(current_method != NULL, "old and but not obsolete, so should exist"); |
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1514 new_id = Method::make_jmethod_id(ik_h->class_loader_data(), current_method); |
0 | 1515 } else { |
1516 // It is the current version of the method or an obsolete method, | |
1517 // use the version passed in | |
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1518 new_id = Method::make_jmethod_id(ik_h->class_loader_data(), method_h()); |
0 | 1519 } |
1520 | |
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1521 if (Threads::number_of_threads() == 0 || |
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1522 SafepointSynchronize::is_at_safepoint()) { |
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1523 // we're single threaded or at a safepoint - no locking needed |
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1524 id = get_jmethod_id_fetch_or_update(ik_h, idnum, new_id, new_jmeths, |
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1525 &to_dealloc_id, &to_dealloc_jmeths); |
49
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1526 } else { |
0 | 1527 MutexLocker ml(JmethodIdCreation_lock); |
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1528 id = get_jmethod_id_fetch_or_update(ik_h, idnum, new_id, new_jmeths, |
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1529 &to_dealloc_id, &to_dealloc_jmeths); |
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|
1530 } |
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1531 |
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1532 // The lock has been dropped so we can free resources. |
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1533 // Free up either the old cache or the new cache if we allocated one. |
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1534 if (to_dealloc_jmeths != NULL) { |
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1535 FreeHeap(to_dealloc_jmeths); |
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1536 } |
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1537 // free up the new ID since it wasn't needed |
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1538 if (to_dealloc_id != NULL) { |
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1539 Method::destroy_jmethod_id(ik_h->class_loader_data(), to_dealloc_id); |
49
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1540 } |
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1541 } |
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1542 return id; |
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1543 } |
0 | 1544 |
49
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1545 |
977
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1546 // Common code to fetch the jmethodID from the cache or update the |
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1547 // cache with the new jmethodID. This function should never do anything |
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1548 // that causes the caller to go to a safepoint or we can deadlock with |
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1549 // the VMThread or have cache consistency issues. |
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1550 // |
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1551 jmethodID InstanceKlass::get_jmethod_id_fetch_or_update( |
977
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1552 instanceKlassHandle ik_h, size_t idnum, jmethodID new_id, |
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1553 jmethodID* new_jmeths, jmethodID* to_dealloc_id_p, |
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1554 jmethodID** to_dealloc_jmeths_p) { |
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1555 assert(new_id != NULL, "sanity check"); |
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1556 assert(to_dealloc_id_p != NULL, "sanity check"); |
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|
1557 assert(to_dealloc_jmeths_p != NULL, "sanity check"); |
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1558 assert(Threads::number_of_threads() == 0 || |
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1559 SafepointSynchronize::is_at_safepoint() || |
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1560 JmethodIdCreation_lock->owned_by_self(), "sanity check"); |
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1561 |
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1562 // reacquire the cache - we are locked, single threaded or at a safepoint |
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1563 jmethodID* jmeths = ik_h->methods_jmethod_ids_acquire(); |
977
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1564 jmethodID id = NULL; |
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1565 size_t length = 0; |
0 | 1566 |
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1567 if (jmeths == NULL || // no cache yet |
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1568 (length = (size_t)jmeths[0]) <= idnum) { // cache is too short |
49
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1569 if (jmeths != NULL) { |
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1570 // copy any existing entries from the old cache |
49
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1571 for (size_t index = 0; index < length; index++) { |
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1572 new_jmeths[index+1] = jmeths[index+1]; |
0 | 1573 } |
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1574 *to_dealloc_jmeths_p = jmeths; // save old cache for later delete |
0 | 1575 } |
49
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1576 ik_h->release_set_methods_jmethod_ids(jmeths = new_jmeths); |
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1577 } else { |
977
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1578 // fetch jmethodID (if any) from the existing cache |
49
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1579 id = jmeths[idnum+1]; |
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1580 *to_dealloc_jmeths_p = new_jmeths; // save new cache for later delete |
49
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1581 } |
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1582 if (id == NULL) { |
977
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1583 // No matching jmethodID in the existing cache or we have a new |
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1584 // cache or we just grew the cache. This cache write is done here |
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1585 // by the first thread to win the foot race because a jmethodID |
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1586 // needs to be unique once it is generally available. |
49
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1587 id = new_id; |
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1588 |
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1589 // The jmethodID cache can be read while unlocked so we have to |
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1590 // make sure the new jmethodID is complete before installing it |
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1591 // in the cache. |
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1592 OrderAccess::release_store_ptr(&jmeths[idnum+1], id); |
49
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1593 } else { |
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1594 *to_dealloc_id_p = new_id; // save new id for later delete |
0 | 1595 } |
1596 return id; | |
1597 } | |
1598 | |
1599 | |
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1600 // Common code to get the jmethodID cache length and the jmethodID |
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1601 // value at index idnum if there is one. |
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1602 // |
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1603 void InstanceKlass::get_jmethod_id_length_value(jmethodID* cache, |
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1604 size_t idnum, size_t *length_p, jmethodID* id_p) { |
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1605 assert(cache != NULL, "sanity check"); |
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1606 assert(length_p != NULL, "sanity check"); |
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1607 assert(id_p != NULL, "sanity check"); |
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1608 |
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1609 // cache size is stored in element[0], other elements offset by one |
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1610 *length_p = (size_t)cache[0]; |
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1611 if (*length_p <= idnum) { // cache is too short |
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|
1612 *id_p = NULL; |
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1613 } else { |
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1614 *id_p = cache[idnum+1]; // fetch jmethodID (if any) |
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1615 } |
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1616 } |
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|
1617 |
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1618 |
0 | 1619 // Lookup a jmethodID, NULL if not found. Do no blocking, no allocations, no handles |
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1620 jmethodID InstanceKlass::jmethod_id_or_null(Method* method) { |
0 | 1621 size_t idnum = (size_t)method->method_idnum(); |
1622 jmethodID* jmeths = methods_jmethod_ids_acquire(); | |
1623 size_t length; // length assigned as debugging crumb | |
1624 jmethodID id = NULL; | |
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1625 if (jmeths != NULL && // If there is a cache |
0 | 1626 (length = (size_t)jmeths[0]) > idnum) { // and if it is long enough, |
1627 id = jmeths[idnum+1]; // Look up the id (may be NULL) | |
1628 } | |
1629 return id; | |
1630 } | |
1631 | |
1632 | |
1633 // Cache an itable index | |
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1634 void InstanceKlass::set_cached_itable_index(size_t idnum, int index) { |
0 | 1635 int* indices = methods_cached_itable_indices_acquire(); |
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1636 int* to_dealloc_indices = NULL; |
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|
1637 |
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1638 // We use a double-check locking idiom here because this cache is |
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1639 // performance sensitive. In the normal system, this cache only |
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1640 // transitions from NULL to non-NULL which is safe because we use |
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1641 // release_set_methods_cached_itable_indices() to advertise the |
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1642 // new cache. A partially constructed cache should never be seen |
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1643 // by a racing thread. Cache reads and writes proceed without a |
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1644 // lock, but creation of the cache itself requires no leaks so a |
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1645 // lock is generally acquired in that case. |
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|
1646 // |
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|
1647 // If the RedefineClasses() API has been used, then this cache can |
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1648 // grow and we'll have transitions from non-NULL to bigger non-NULL. |
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1649 // Cache creation requires no leaks and we require safety between all |
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|
1650 // cache accesses and freeing of the old cache so a lock is generally |
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|
1651 // acquired when the RedefineClasses() API has been used. |
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|
1652 |
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|
1653 if (indices == NULL || idnum_can_increment()) { |
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|
1654 // we need a cache or the cache can grow |
0 | 1655 MutexLocker ml(JNICachedItableIndex_lock); |
977
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|
1656 // reacquire the cache to see if another thread already did the work |
0 | 1657 indices = methods_cached_itable_indices_acquire(); |
1658 size_t length = 0; | |
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1659 // cache size is stored in element[0], other elements offset by one |
0 | 1660 if (indices == NULL || (length = (size_t)indices[0]) <= idnum) { |
1661 size_t size = MAX2(idnum+1, (size_t)idnum_allocated_count()); | |
6197 | 1662 int* new_indices = NEW_C_HEAP_ARRAY(int, size+1, mtClass); |
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|
1663 new_indices[0] = (int)size; |
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|
1664 // copy any existing entries |
0 | 1665 size_t i; |
1666 for (i = 0; i < length; i++) { | |
1667 new_indices[i+1] = indices[i+1]; | |
1668 } | |
1669 // Set all the rest to -1 | |
1670 for (i = length; i < size; i++) { | |
1671 new_indices[i+1] = -1; | |
1672 } | |
1673 if (indices != NULL) { | |
977
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1674 // We have an old cache to delete so save it for after we |
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|
1675 // drop the lock. |
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|
1676 to_dealloc_indices = indices; |
0 | 1677 } |
1678 release_set_methods_cached_itable_indices(indices = new_indices); | |
1679 } | |
977
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1680 |
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1681 if (idnum_can_increment()) { |
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1682 // this cache can grow so we have to write to it safely |
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1683 indices[idnum+1] = index; |
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1684 } |
0 | 1685 } else { |
1686 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); | |
1687 } | |
977
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1688 |
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1689 if (!idnum_can_increment()) { |
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1690 // The cache cannot grow and this JNI itable index value does not |
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1691 // have to be unique like a jmethodID. If there is a race to set it, |
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1692 // it doesn't matter. |
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1693 indices[idnum+1] = index; |
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1694 } |
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1695 |
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1696 if (to_dealloc_indices != NULL) { |
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1697 // we allocated a new cache so free the old one |
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1698 FreeHeap(to_dealloc_indices); |
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1699 } |
0 | 1700 } |
1701 | |
1702 | |
1703 // Retrieve a cached itable index | |
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1704 int InstanceKlass::cached_itable_index(size_t idnum) { |
0 | 1705 int* indices = methods_cached_itable_indices_acquire(); |
1706 if (indices != NULL && ((size_t)indices[0]) > idnum) { | |
1707 // indices exist and are long enough, retrieve possible cached | |
1708 return indices[idnum+1]; | |
1709 } | |
1710 return -1; | |
1711 } | |
1712 | |
1713 | |
1714 // | |
1715 // Walk the list of dependent nmethods searching for nmethods which | |
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1716 // are dependent on the changes that were passed in and mark them for |
0 | 1717 // deoptimization. Returns the number of nmethods found. |
1718 // | |
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1719 int InstanceKlass::mark_dependent_nmethods(DepChange& changes) { |
0 | 1720 assert_locked_or_safepoint(CodeCache_lock); |
1721 int found = 0; | |
1722 nmethodBucket* b = _dependencies; | |
1723 while (b != NULL) { | |
1724 nmethod* nm = b->get_nmethod(); | |
1725 // since dependencies aren't removed until an nmethod becomes a zombie, | |
1726 // the dependency list may contain nmethods which aren't alive. | |
1727 if (nm->is_alive() && !nm->is_marked_for_deoptimization() && nm->check_dependency_on(changes)) { | |
1728 if (TraceDependencies) { | |
1729 ResourceMark rm; | |
1730 tty->print_cr("Marked for deoptimization"); | |
1731 tty->print_cr(" context = %s", this->external_name()); | |
1732 changes.print(); | |
1733 nm->print(); | |
1734 nm->print_dependencies(); | |
1735 } | |
1736 nm->mark_for_deoptimization(); | |
1737 found++; | |
1738 } | |
1739 b = b->next(); | |
1740 } | |
1741 return found; | |
1742 } | |
1743 | |
1744 | |
1745 // | |
1746 // Add an nmethodBucket to the list of dependencies for this nmethod. | |
1747 // It's possible that an nmethod has multiple dependencies on this klass | |
1748 // so a count is kept for each bucket to guarantee that creation and | |
1749 // deletion of dependencies is consistent. | |
1750 // | |
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1751 void InstanceKlass::add_dependent_nmethod(nmethod* nm) { |
0 | 1752 assert_locked_or_safepoint(CodeCache_lock); |
1753 nmethodBucket* b = _dependencies; | |
1754 nmethodBucket* last = NULL; | |
1755 while (b != NULL) { | |
1756 if (nm == b->get_nmethod()) { | |
1757 b->increment(); | |
1758 return; | |
1759 } | |
1760 b = b->next(); | |
1761 } | |
1762 _dependencies = new nmethodBucket(nm, _dependencies); | |
1763 } | |
1764 | |
1765 | |
1766 // | |
1767 // Decrement count of the nmethod in the dependency list and remove | |
1768 // the bucket competely when the count goes to 0. This method must | |
1769 // find a corresponding bucket otherwise there's a bug in the | |
1770 // recording of dependecies. | |
1771 // | |
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1772 void InstanceKlass::remove_dependent_nmethod(nmethod* nm) { |
0 | 1773 assert_locked_or_safepoint(CodeCache_lock); |
1774 nmethodBucket* b = _dependencies; | |
1775 nmethodBucket* last = NULL; | |
1776 while (b != NULL) { | |
1777 if (nm == b->get_nmethod()) { | |
1778 if (b->decrement() == 0) { | |
1779 if (last == NULL) { | |
1780 _dependencies = b->next(); | |
1781 } else { | |
1782 last->set_next(b->next()); | |
1783 } | |
1784 delete b; | |
1785 } | |
1786 return; | |
1787 } | |
1788 last = b; | |
1789 b = b->next(); | |
1790 } | |
1791 #ifdef ASSERT | |
1792 tty->print_cr("### %s can't find dependent nmethod:", this->external_name()); | |
1793 nm->print(); | |
1794 #endif // ASSERT | |
1795 ShouldNotReachHere(); | |
1796 } | |
1797 | |
1798 | |
1799 #ifndef PRODUCT | |
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1800 void InstanceKlass::print_dependent_nmethods(bool verbose) { |
0 | 1801 nmethodBucket* b = _dependencies; |
1802 int idx = 0; | |
1803 while (b != NULL) { | |
1804 nmethod* nm = b->get_nmethod(); | |
1805 tty->print("[%d] count=%d { ", idx++, b->count()); | |
1806 if (!verbose) { | |
1807 nm->print_on(tty, "nmethod"); | |
1808 tty->print_cr(" } "); | |
1809 } else { | |
1810 nm->print(); | |
1811 nm->print_dependencies(); | |
1812 tty->print_cr("--- } "); | |
1813 } | |
1814 b = b->next(); | |
1815 } | |
1816 } | |
1817 | |
1818 | |
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1819 bool InstanceKlass::is_dependent_nmethod(nmethod* nm) { |
0 | 1820 nmethodBucket* b = _dependencies; |
1821 while (b != NULL) { | |
1822 if (nm == b->get_nmethod()) { | |
1823 return true; | |
1824 } | |
1825 b = b->next(); | |
1826 } | |
1827 return false; | |
1828 } | |
1829 #endif //PRODUCT | |
1830 | |
1831 | |
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1832 // Garbage collection |
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1833 |
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1834 void InstanceKlass::oops_do(OopClosure* cl) { |
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1835 Klass::oops_do(cl); |
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1836 |
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1837 cl->do_oop(adr_protection_domain()); |
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1838 cl->do_oop(adr_signers()); |
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1839 cl->do_oop(adr_init_lock()); |
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1840 |
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1841 // Don't walk the arrays since they are walked from the ClassLoaderData objects. |
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1842 } |
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1843 |
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1844 #ifdef ASSERT |
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1845 template <class T> void assert_is_in(T *p) { |
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1846 T heap_oop = oopDesc::load_heap_oop(p); |
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1847 if (!oopDesc::is_null(heap_oop)) { |
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1848 oop o = oopDesc::decode_heap_oop_not_null(heap_oop); |
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1849 assert(Universe::heap()->is_in(o), "should be in heap"); |
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1850 } |
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1851 } |
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1852 template <class T> void assert_is_in_closed_subset(T *p) { |
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1853 T heap_oop = oopDesc::load_heap_oop(p); |
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1854 if (!oopDesc::is_null(heap_oop)) { |
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1855 oop o = oopDesc::decode_heap_oop_not_null(heap_oop); |
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1856 assert(Universe::heap()->is_in_closed_subset(o), |
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1857 err_msg("should be in closed *p " INTPTR_FORMAT " " INTPTR_FORMAT, (address)p, (address)o)); |
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1858 } |
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1859 } |
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1860 template <class T> void assert_is_in_reserved(T *p) { |
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1861 T heap_oop = oopDesc::load_heap_oop(p); |
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1862 if (!oopDesc::is_null(heap_oop)) { |
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1863 oop o = oopDesc::decode_heap_oop_not_null(heap_oop); |
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1864 assert(Universe::heap()->is_in_reserved(o), "should be in reserved"); |
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1865 } |
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1866 } |
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1867 template <class T> void assert_nothing(T *p) {} |
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1868 |
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1869 #else |
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1870 template <class T> void assert_is_in(T *p) {} |
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1871 template <class T> void assert_is_in_closed_subset(T *p) {} |
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1872 template <class T> void assert_is_in_reserved(T *p) {} |
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1873 template <class T> void assert_nothing(T *p) {} |
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1874 #endif // ASSERT |
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1875 |
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1876 // |
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1877 // Macros that iterate over areas of oops which are specialized on type of |
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1878 // oop pointer either narrow or wide, depending on UseCompressedOops |
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1879 // |
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1880 // Parameters are: |
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1881 // T - type of oop to point to (either oop or narrowOop) |
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1882 // start_p - starting pointer for region to iterate over |
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1883 // count - number of oops or narrowOops to iterate over |
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1884 // do_oop - action to perform on each oop (it's arbitrary C code which |
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1885 // makes it more efficient to put in a macro rather than making |
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1886 // it a template function) |
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1887 // assert_fn - assert function which is template function because performance |
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1888 // doesn't matter when enabled. |
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1889 #define InstanceKlass_SPECIALIZED_OOP_ITERATE( \ |
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1890 T, start_p, count, do_oop, \ |
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1891 assert_fn) \ |
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1892 { \ |
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1893 T* p = (T*)(start_p); \ |
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1894 T* const end = p + (count); \ |
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1895 while (p < end) { \ |
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1896 (assert_fn)(p); \ |
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1897 do_oop; \ |
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1898 ++p; \ |
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1899 } \ |
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1900 } |
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1901 |
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1902 #define InstanceKlass_SPECIALIZED_OOP_REVERSE_ITERATE( \ |
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1903 T, start_p, count, do_oop, \ |
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1904 assert_fn) \ |
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1905 { \ |
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1906 T* const start = (T*)(start_p); \ |
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1907 T* p = start + (count); \ |
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1908 while (start < p) { \ |
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1909 --p; \ |
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1910 (assert_fn)(p); \ |
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1911 do_oop; \ |
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1912 } \ |
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1913 } |
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1914 |
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1915 #define InstanceKlass_SPECIALIZED_BOUNDED_OOP_ITERATE( \ |
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1916 T, start_p, count, low, high, \ |
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1917 do_oop, assert_fn) \ |
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1918 { \ |
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1919 T* const l = (T*)(low); \ |
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1920 T* const h = (T*)(high); \ |
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1921 assert(mask_bits((intptr_t)l, sizeof(T)-1) == 0 && \ |
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1922 mask_bits((intptr_t)h, sizeof(T)-1) == 0, \ |
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1923 "bounded region must be properly aligned"); \ |
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1924 T* p = (T*)(start_p); \ |
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1925 T* end = p + (count); \ |
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1926 if (p < l) p = l; \ |
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1927 if (end > h) end = h; \ |
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1928 while (p < end) { \ |
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1929 (assert_fn)(p); \ |
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1930 do_oop; \ |
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1931 ++p; \ |
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1932 } \ |
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1933 } |
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1934 |
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1935 |
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1936 // The following macros call specialized macros, passing either oop or |
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1937 // narrowOop as the specialization type. These test the UseCompressedOops |
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1938 // flag. |
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1939 #define InstanceKlass_OOP_MAP_ITERATE(obj, do_oop, assert_fn) \ |
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1940 { \ |
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1941 /* Compute oopmap block range. The common case \ |
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1942 is nonstatic_oop_map_size == 1. */ \ |
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1943 OopMapBlock* map = start_of_nonstatic_oop_maps(); \ |
938 | 1944 OopMapBlock* const end_map = map + nonstatic_oop_map_count(); \ |
113
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1945 if (UseCompressedOops) { \ |
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1946 while (map < end_map) { \ |
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1947 InstanceKlass_SPECIALIZED_OOP_ITERATE(narrowOop, \ |
938 | 1948 obj->obj_field_addr<narrowOop>(map->offset()), map->count(), \ |
113
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1949 do_oop, assert_fn) \ |
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1950 ++map; \ |
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1951 } \ |
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1952 } else { \ |
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1953 while (map < end_map) { \ |
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1954 InstanceKlass_SPECIALIZED_OOP_ITERATE(oop, \ |
938 | 1955 obj->obj_field_addr<oop>(map->offset()), map->count(), \ |
113
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1956 do_oop, assert_fn) \ |
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1957 ++map; \ |
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1958 } \ |
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1959 } \ |
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1960 } |
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1961 |
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1962 #define InstanceKlass_OOP_MAP_REVERSE_ITERATE(obj, do_oop, assert_fn) \ |
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1963 { \ |
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1964 OopMapBlock* const start_map = start_of_nonstatic_oop_maps(); \ |
938 | 1965 OopMapBlock* map = start_map + nonstatic_oop_map_count(); \ |
113
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1966 if (UseCompressedOops) { \ |
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1967 while (start_map < map) { \ |
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1968 --map; \ |
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1969 InstanceKlass_SPECIALIZED_OOP_REVERSE_ITERATE(narrowOop, \ |
938 | 1970 obj->obj_field_addr<narrowOop>(map->offset()), map->count(), \ |
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1971 do_oop, assert_fn) \ |
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1972 } \ |
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1973 } else { \ |
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1974 while (start_map < map) { \ |
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1975 --map; \ |
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1976 InstanceKlass_SPECIALIZED_OOP_REVERSE_ITERATE(oop, \ |
938 | 1977 obj->obj_field_addr<oop>(map->offset()), map->count(), \ |
113
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1978 do_oop, assert_fn) \ |
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1979 } \ |
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1980 } \ |
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1981 } |
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1982 |
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1983 #define InstanceKlass_BOUNDED_OOP_MAP_ITERATE(obj, low, high, do_oop, \ |
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1984 assert_fn) \ |
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1985 { \ |
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1986 /* Compute oopmap block range. The common case is \ |
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1987 nonstatic_oop_map_size == 1, so we accept the \ |
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1988 usually non-existent extra overhead of examining \ |
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1989 all the maps. */ \ |
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1990 OopMapBlock* map = start_of_nonstatic_oop_maps(); \ |
938 | 1991 OopMapBlock* const end_map = map + nonstatic_oop_map_count(); \ |
113
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1992 if (UseCompressedOops) { \ |
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1993 while (map < end_map) { \ |
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1994 InstanceKlass_SPECIALIZED_BOUNDED_OOP_ITERATE(narrowOop, \ |
938 | 1995 obj->obj_field_addr<narrowOop>(map->offset()), map->count(), \ |
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1996 low, high, \ |
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1997 do_oop, assert_fn) \ |
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1998 ++map; \ |
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1999 } \ |
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2000 } else { \ |
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2001 while (map < end_map) { \ |
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2002 InstanceKlass_SPECIALIZED_BOUNDED_OOP_ITERATE(oop, \ |
938 | 2003 obj->obj_field_addr<oop>(map->offset()), map->count(), \ |
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2004 low, high, \ |
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2005 do_oop, assert_fn) \ |
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2006 ++map; \ |
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2007 } \ |
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2008 } \ |
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2009 } |
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2010 |
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2011 void InstanceKlass::oop_follow_contents(oop obj) { |
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2012 assert(obj != NULL, "can't follow the content of NULL object"); |
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2013 MarkSweep::follow_klass(obj->klass()); |
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2014 InstanceKlass_OOP_MAP_ITERATE( \ |
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2015 obj, \ |
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2016 MarkSweep::mark_and_push(p), \ |
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2017 assert_is_in_closed_subset) |
0 | 2018 } |
2019 | |
2020 #ifndef SERIALGC | |
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2021 void InstanceKlass::oop_follow_contents(ParCompactionManager* cm, |
0 | 2022 oop obj) { |
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2023 assert(obj != NULL, "can't follow the content of NULL object"); |
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2024 PSParallelCompact::follow_klass(cm, obj->klass()); |
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2025 // Only mark the header and let the scan of the meta-data mark |
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2026 // everything else. |
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2027 InstanceKlass_OOP_MAP_ITERATE( \ |
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2028 obj, \ |
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2029 PSParallelCompact::mark_and_push(cm, p), \ |
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2030 assert_is_in) |
0 | 2031 } |
2032 #endif // SERIALGC | |
2033 | |
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2034 // closure's do_metadata() method dictates whether the given closure should be |
0 | 2035 // applied to the klass ptr in the object header. |
2036 | |
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2037 #define if_do_metadata_checked(closure, nv_suffix) \ |
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2038 /* Make sure the non-virtual and the virtual versions match. */ \ |
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2039 assert(closure->do_metadata##nv_suffix() == closure->do_metadata(), \ |
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2040 "Inconsistency in do_metadata"); \ |
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2041 if (closure->do_metadata##nv_suffix()) |
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2042 |
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2043 #define InstanceKlass_OOP_OOP_ITERATE_DEFN(OopClosureType, nv_suffix) \ |
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2044 \ |
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2045 int InstanceKlass::oop_oop_iterate##nv_suffix(oop obj, OopClosureType* closure) { \ |
113
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2046 SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::ik);\ |
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2047 /* header */ \ |
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2048 if_do_metadata_checked(closure, nv_suffix) { \ |
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2049 closure->do_klass##nv_suffix(obj->klass()); \ |
113
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2050 } \ |
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2051 InstanceKlass_OOP_MAP_ITERATE( \ |
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2052 obj, \ |
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2053 SpecializationStats:: \ |
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2054 record_do_oop_call##nv_suffix(SpecializationStats::ik); \ |
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2055 (closure)->do_oop##nv_suffix(p), \ |
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2056 assert_is_in_closed_subset) \ |
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2057 return size_helper(); \ |
0 | 2058 } |
2059 | |
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2060 #ifndef SERIALGC |
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2061 #define InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DEFN(OopClosureType, nv_suffix) \ |
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2062 \ |
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2063 int InstanceKlass::oop_oop_iterate_backwards##nv_suffix(oop obj, \ |
342
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2064 OopClosureType* closure) { \ |
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2065 SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::ik); \ |
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2066 /* header */ \ |
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2067 if_do_metadata_checked(closure, nv_suffix) { \ |
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2068 closure->do_klass##nv_suffix(obj->klass()); \ |
342
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2069 } \ |
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2070 /* instance variables */ \ |
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2071 InstanceKlass_OOP_MAP_REVERSE_ITERATE( \ |
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2072 obj, \ |
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2073 SpecializationStats::record_do_oop_call##nv_suffix(SpecializationStats::ik);\ |
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2074 (closure)->do_oop##nv_suffix(p), \ |
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2075 assert_is_in_closed_subset) \ |
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2076 return size_helper(); \ |
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2077 } |
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2078 #endif // !SERIALGC |
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2079 |
113
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2080 #define InstanceKlass_OOP_OOP_ITERATE_DEFN_m(OopClosureType, nv_suffix) \ |
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2081 \ |
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2082 int InstanceKlass::oop_oop_iterate##nv_suffix##_m(oop obj, \ |
113
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2083 OopClosureType* closure, \ |
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2084 MemRegion mr) { \ |
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2085 SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::ik);\ |
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2086 if_do_metadata_checked(closure, nv_suffix) { \ |
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2087 if (mr.contains(obj)) { \ |
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2088 closure->do_klass##nv_suffix(obj->klass()); \ |
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2089 } \ |
113
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2090 } \ |
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2091 InstanceKlass_BOUNDED_OOP_MAP_ITERATE( \ |
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2092 obj, mr.start(), mr.end(), \ |
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2093 (closure)->do_oop##nv_suffix(p), \ |
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2094 assert_is_in_closed_subset) \ |
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2095 return size_helper(); \ |
0 | 2096 } |
2097 | |
2098 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_DEFN) | |
342
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2099 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_DEFN) |
0 | 2100 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_DEFN_m) |
342
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2101 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_DEFN_m) |
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2102 #ifndef SERIALGC |
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2103 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DEFN) |
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2104 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DEFN) |
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2105 #endif // !SERIALGC |
0 | 2106 |
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2107 int InstanceKlass::oop_adjust_pointers(oop obj) { |
0 | 2108 int size = size_helper(); |
113
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2109 InstanceKlass_OOP_MAP_ITERATE( \ |
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2110 obj, \ |
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2111 MarkSweep::adjust_pointer(p), \ |
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2112 assert_is_in) |
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2113 MarkSweep::adjust_klass(obj->klass()); |
0 | 2114 return size; |
2115 } | |
2116 | |
2117 #ifndef SERIALGC | |
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2118 void InstanceKlass::oop_push_contents(PSPromotionManager* pm, oop obj) { |
113
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2119 InstanceKlass_OOP_MAP_REVERSE_ITERATE( \ |
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2120 obj, \ |
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2121 if (PSScavenge::should_scavenge(p)) { \ |
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2122 pm->claim_or_forward_depth(p); \ |
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2123 }, \ |
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2124 assert_nothing ) |
0 | 2125 } |
2126 | |
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2127 int InstanceKlass::oop_update_pointers(ParCompactionManager* cm, oop obj) { |
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2128 int size = size_helper(); |
113
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2129 InstanceKlass_OOP_MAP_ITERATE( \ |
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2130 obj, \ |
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2131 PSParallelCompact::adjust_pointer(p), \ |
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2132 assert_is_in) |
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2133 obj->update_header(cm); |
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2134 return size; |
0 | 2135 } |
2136 | |
2137 #endif // SERIALGC | |
2138 | |
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2139 void InstanceKlass::clean_implementors_list(BoolObjectClosure* is_alive) { |
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2140 assert(is_loader_alive(is_alive), "this klass should be live"); |
5998
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2141 if (is_interface()) { |
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2142 if (ClassUnloading) { |
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2143 Klass* impl = implementor(); |
5998
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2144 if (impl != NULL) { |
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2145 if (!impl->is_loader_alive(is_alive)) { |
5998
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2146 // remove this guy |
6038
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2147 *adr_implementor() = NULL; |
5998
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2148 } |
0 | 2149 } |
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2150 } |
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2151 } |
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2152 } |
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2153 |
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2154 void InstanceKlass::clean_method_data(BoolObjectClosure* is_alive) { |
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2155 #ifdef COMPILER2 |
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2156 // Currently only used by C2. |
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2157 for (int m = 0; m < methods()->length(); m++) { |
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2158 MethodData* mdo = methods()->at(m)->method_data(); |
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2159 if (mdo != NULL) { |
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2160 for (ProfileData* data = mdo->first_data(); |
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2161 mdo->is_valid(data); |
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2162 data = mdo->next_data(data)) { |
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2163 data->clean_weak_klass_links(is_alive); |
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2164 } |
0 | 2165 } |
2166 } | |
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2167 #else |
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2168 #ifdef ASSERT |
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2169 // Verify that we haven't started to use MDOs for C1. |
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2170 for (int m = 0; m < methods()->length(); m++) { |
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2171 MethodData* mdo = methods()->at(m)->method_data(); |
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2172 assert(mdo == NULL, "Didn't expect C1 to use MDOs"); |
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2173 } |
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2174 #endif // ASSERT |
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2175 #endif // !COMPILER2 |
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2176 } |
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2177 |
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2178 |
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2179 static void remove_unshareable_in_class(Klass* k) { |
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2180 // remove klass's unshareable info |
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2181 k->remove_unshareable_info(); |
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2182 } |
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2183 |
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2184 void InstanceKlass::remove_unshareable_info() { |
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2185 Klass::remove_unshareable_info(); |
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2186 // Unlink the class |
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2187 if (is_linked()) { |
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2188 unlink_class(); |
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2189 } |
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2190 init_implementor(); |
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2191 |
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2192 constants()->remove_unshareable_info(); |
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2193 |
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2194 for (int i = 0; i < methods()->length(); i++) { |
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2195 Method* m = methods()->at(i); |
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2196 m->remove_unshareable_info(); |
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2197 } |
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2198 |
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2199 // Need to reinstate when reading back the class. |
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2200 set_init_lock(NULL); |
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2201 |
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2202 // do array classes also. |
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2203 array_klasses_do(remove_unshareable_in_class); |
0 | 2204 } |
2205 | |
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2206 void restore_unshareable_in_class(Klass* k, TRAPS) { |
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2207 k->restore_unshareable_info(CHECK); |
0 | 2208 } |
2209 | |
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2210 void InstanceKlass::restore_unshareable_info(TRAPS) { |
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2211 Klass::restore_unshareable_info(CHECK); |
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2212 instanceKlassHandle ik(THREAD, this); |
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2213 |
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2214 Array<Method*>* methods = ik->methods(); |
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2215 int num_methods = methods->length(); |
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2216 for (int index2 = 0; index2 < num_methods; ++index2) { |
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2217 methodHandle m(THREAD, methods->at(index2)); |
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2218 m()->link_method(m, CHECK); |
6733
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2219 // restore method's vtable by calling a virtual function |
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2220 m->restore_vtable(); |
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2221 } |
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2222 if (JvmtiExport::has_redefined_a_class()) { |
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2223 // Reinitialize vtable because RedefineClasses may have changed some |
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2224 // entries in this vtable for super classes so the CDS vtable might |
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2225 // point to old or obsolete entries. RedefineClasses doesn't fix up |
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2226 // vtables in the shared system dictionary, only the main one. |
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2227 // It also redefines the itable too so fix that too. |
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2228 ResourceMark rm(THREAD); |
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2229 ik->vtable()->initialize_vtable(false, CHECK); |
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2230 ik->itable()->initialize_itable(false, CHECK); |
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2231 } |
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2232 |
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2233 // Allocate a simple java object for a lock. |
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2234 // This needs to be a java object because during class initialization |
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2235 // it can be held across a java call. |
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2236 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK); |
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2237 Handle h(THREAD, (oop)r); |
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2238 ik->set_init_lock(h()); |
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2239 |
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2240 // restore constant pool resolved references |
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2241 ik->constants()->restore_unshareable_info(CHECK); |
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2242 |
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2243 ik->array_klasses_do(restore_unshareable_in_class, CHECK); |
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2244 } |
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2245 |
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2246 static void clear_all_breakpoints(Method* m) { |
0 | 2247 m->clear_all_breakpoints(); |
2248 } | |
2249 | |
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2250 void InstanceKlass::release_C_heap_structures() { |
0 | 2251 // Deallocate oop map cache |
2252 if (_oop_map_cache != NULL) { | |
2253 delete _oop_map_cache; | |
2254 _oop_map_cache = NULL; | |
2255 } | |
2256 | |
2257 // Deallocate JNI identifiers for jfieldIDs | |
2258 JNIid::deallocate(jni_ids()); | |
2259 set_jni_ids(NULL); | |
2260 | |
2261 jmethodID* jmeths = methods_jmethod_ids_acquire(); | |
2262 if (jmeths != (jmethodID*)NULL) { | |
2263 release_set_methods_jmethod_ids(NULL); | |
2264 FreeHeap(jmeths); | |
2265 } | |
2266 | |
2267 int* indices = methods_cached_itable_indices_acquire(); | |
2268 if (indices != (int*)NULL) { | |
2269 release_set_methods_cached_itable_indices(NULL); | |
2270 FreeHeap(indices); | |
2271 } | |
2272 | |
2273 // release dependencies | |
2274 nmethodBucket* b = _dependencies; | |
2275 _dependencies = NULL; | |
2276 while (b != NULL) { | |
2277 nmethodBucket* next = b->next(); | |
2278 delete b; | |
2279 b = next; | |
2280 } | |
2281 | |
2282 // Deallocate breakpoint records | |
2283 if (breakpoints() != 0x0) { | |
2284 methods_do(clear_all_breakpoints); | |
2285 assert(breakpoints() == 0x0, "should have cleared breakpoints"); | |
2286 } | |
2287 | |
2288 // deallocate information about previous versions | |
2289 if (_previous_versions != NULL) { | |
2290 for (int i = _previous_versions->length() - 1; i >= 0; i--) { | |
2291 PreviousVersionNode * pv_node = _previous_versions->at(i); | |
2292 delete pv_node; | |
2293 } | |
2294 delete _previous_versions; | |
2295 _previous_versions = NULL; | |
2296 } | |
2297 | |
2298 // deallocate the cached class file | |
2299 if (_cached_class_file_bytes != NULL) { | |
6197 | 2300 os::free(_cached_class_file_bytes, mtClass); |
0 | 2301 _cached_class_file_bytes = NULL; |
2302 _cached_class_file_len = 0; | |
2303 } | |
2177
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2304 |
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2305 // Decrement symbol reference counts associated with the unloaded class. |
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2306 if (_name != NULL) _name->decrement_refcount(); |
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2307 // unreference array name derived from this class name (arrays of an unloaded |
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2308 // class can't be referenced anymore). |
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2309 if (_array_name != NULL) _array_name->decrement_refcount(); |
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2310 if (_source_file_name != NULL) _source_file_name->decrement_refcount(); |
6203
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2311 if (_source_debug_extension != NULL) FREE_C_HEAP_ARRAY(char, _source_debug_extension, mtClass); |
7464
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|
2312 |
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2313 assert(_total_instanceKlass_count >= 1, "Sanity check"); |
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2314 Atomic::dec(&_total_instanceKlass_count); |
2177
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2315 } |
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2316 |
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2317 void InstanceKlass::set_source_file_name(Symbol* n) { |
2177
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2318 _source_file_name = n; |
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2319 if (_source_file_name != NULL) _source_file_name->increment_refcount(); |
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2320 } |
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2321 |
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2322 void InstanceKlass::set_source_debug_extension(char* array, int length) { |
6203
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2323 if (array == NULL) { |
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2324 _source_debug_extension = NULL; |
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2325 } else { |
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2326 // Adding one to the attribute length in order to store a null terminator |
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2327 // character could cause an overflow because the attribute length is |
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2328 // already coded with an u4 in the classfile, but in practice, it's |
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2329 // unlikely to happen. |
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2330 assert((length+1) > length, "Overflow checking"); |
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2331 char* sde = NEW_C_HEAP_ARRAY(char, (length + 1), mtClass); |
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2332 for (int i = 0; i < length; i++) { |
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2333 sde[i] = array[i]; |
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2334 } |
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2335 sde[length] = '\0'; |
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2336 _source_debug_extension = sde; |
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2337 } |
0 | 2338 } |
2339 | |
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2340 address InstanceKlass::static_field_addr(int offset) { |
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2341 return (address)(offset + InstanceMirrorKlass::offset_of_static_fields() + (intptr_t)java_mirror()); |
2376
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|
2342 } |
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|
2343 |
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|
2344 |
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2345 const char* InstanceKlass::signature_name() const { |
0 | 2346 const char* src = (const char*) (name()->as_C_string()); |
2347 const int src_length = (int)strlen(src); | |
2348 char* dest = NEW_RESOURCE_ARRAY(char, src_length + 3); | |
2349 int src_index = 0; | |
2350 int dest_index = 0; | |
2351 dest[dest_index++] = 'L'; | |
2352 while (src_index < src_length) { | |
2353 dest[dest_index++] = src[src_index++]; | |
2354 } | |
2355 dest[dest_index++] = ';'; | |
2356 dest[dest_index] = '\0'; | |
2357 return dest; | |
2358 } | |
2359 | |
2360 // different verisons of is_same_class_package | |
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2361 bool InstanceKlass::is_same_class_package(Klass* class2) { |
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2362 Klass* class1 = this; |
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2363 oop classloader1 = InstanceKlass::cast(class1)->class_loader(); |
6983 | 2364 Symbol* classname1 = class1->name(); |
2365 | |
2366 if (class2->oop_is_objArray()) { | |
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2367 class2 = ObjArrayKlass::cast(class2)->bottom_klass(); |
0 | 2368 } |
2369 oop classloader2; | |
6983 | 2370 if (class2->oop_is_instance()) { |
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2371 classloader2 = InstanceKlass::cast(class2)->class_loader(); |
0 | 2372 } else { |
6983 | 2373 assert(class2->oop_is_typeArray(), "should be type array"); |
0 | 2374 classloader2 = NULL; |
2375 } | |
6983 | 2376 Symbol* classname2 = class2->name(); |
0 | 2377 |
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2378 return InstanceKlass::is_same_class_package(classloader1, classname1, |
0 | 2379 classloader2, classname2); |
2380 } | |
2381 | |
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2382 bool InstanceKlass::is_same_class_package(oop classloader2, Symbol* classname2) { |
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2383 Klass* class1 = this; |
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2384 oop classloader1 = InstanceKlass::cast(class1)->class_loader(); |
6983 | 2385 Symbol* classname1 = class1->name(); |
0 | 2386 |
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2387 return InstanceKlass::is_same_class_package(classloader1, classname1, |
0 | 2388 classloader2, classname2); |
2389 } | |
2390 | |
2391 // return true if two classes are in the same package, classloader | |
2392 // and classname information is enough to determine a class's package | |
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2393 bool InstanceKlass::is_same_class_package(oop class_loader1, Symbol* class_name1, |
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2394 oop class_loader2, Symbol* class_name2) { |
0 | 2395 if (class_loader1 != class_loader2) { |
2396 return false; | |
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2397 } else if (class_name1 == class_name2) { |
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2398 return true; // skip painful bytewise comparison |
0 | 2399 } else { |
2400 ResourceMark rm; | |
2401 | |
2177
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2402 // The Symbol*'s are in UTF8 encoding. Since we only need to check explicitly |
0 | 2403 // for ASCII characters ('/', 'L', '['), we can keep them in UTF8 encoding. |
2404 // Otherwise, we just compare jbyte values between the strings. | |
2177
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2405 const jbyte *name1 = class_name1->base(); |
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2406 const jbyte *name2 = class_name2->base(); |
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2407 |
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|
2408 const jbyte *last_slash1 = UTF8::strrchr(name1, class_name1->utf8_length(), '/'); |
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2409 const jbyte *last_slash2 = UTF8::strrchr(name2, class_name2->utf8_length(), '/'); |
0 | 2410 |
2411 if ((last_slash1 == NULL) || (last_slash2 == NULL)) { | |
2412 // One of the two doesn't have a package. Only return true | |
2413 // if the other one also doesn't have a package. | |
2414 return last_slash1 == last_slash2; | |
2415 } else { | |
2416 // Skip over '['s | |
2417 if (*name1 == '[') { | |
2418 do { | |
2419 name1++; | |
2420 } while (*name1 == '['); | |
2421 if (*name1 != 'L') { | |
2422 // Something is terribly wrong. Shouldn't be here. | |
2423 return false; | |
2424 } | |
2425 } | |
2426 if (*name2 == '[') { | |
2427 do { | |
2428 name2++; | |
2429 } while (*name2 == '['); | |
2430 if (*name2 != 'L') { | |
2431 // Something is terribly wrong. Shouldn't be here. | |
2432 return false; | |
2433 } | |
2434 } | |
2435 | |
2436 // Check that package part is identical | |
2437 int length1 = last_slash1 - name1; | |
2438 int length2 = last_slash2 - name2; | |
2439 | |
2440 return UTF8::equal(name1, length1, name2, length2); | |
2441 } | |
2442 } | |
2443 } | |
2444 | |
652
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|
2445 // Returns true iff super_method can be overridden by a method in targetclassname |
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|
2446 // See JSL 3rd edition 8.4.6.1 |
4aaa9f5e02a8
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|
2447 // Assumes name-signature match |
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2448 // "this" is InstanceKlass of super_method which must exist |
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2449 // note that the InstanceKlass of the method in the targetclassname has not always been created yet |
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2450 bool InstanceKlass::is_override(methodHandle super_method, Handle targetclassloader, Symbol* targetclassname, TRAPS) { |
652
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|
2451 // Private methods can not be overridden |
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|
2452 if (super_method->is_private()) { |
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|
2453 return false; |
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|
2454 } |
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|
2455 // If super method is accessible, then override |
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|
2456 if ((super_method->is_protected()) || |
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|
2457 (super_method->is_public())) { |
4aaa9f5e02a8
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|
2458 return true; |
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|
2459 } |
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|
2460 // Package-private methods are not inherited outside of package |
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|
2461 assert(super_method->is_package_private(), "must be package private"); |
2177
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diff
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|
2462 return(is_same_class_package(targetclassloader(), targetclassname)); |
652
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|
2463 } |
0 | 2464 |
665
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|
2465 /* defined for now in jvm.cpp, for historical reasons *-- |
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|
2466 Klass* InstanceKlass::compute_enclosing_class_impl(instanceKlassHandle self, |
2177
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6990754: Use native memory and reference counting to implement SymbolTable
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|
2467 Symbol*& simple_name_result, TRAPS) { |
665
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|
2468 ... |
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|
2469 } |
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|
2470 */ |
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|
2471 |
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6814659: separable cleanups and subroutines for 6655638
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605
diff
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|
2472 // tell if two classes have the same enclosing class (at package level) |
6725
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|
2473 bool InstanceKlass::is_same_package_member_impl(instanceKlassHandle class1, |
da91efe96a93
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|
2474 Klass* class2_oop, TRAPS) { |
da91efe96a93
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|
2475 if (class2_oop == class1()) return true; |
6983 | 2476 if (!class2_oop->oop_is_instance()) return false; |
665
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6814659: separable cleanups and subroutines for 6655638
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|
2477 instanceKlassHandle class2(THREAD, class2_oop); |
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6814659: separable cleanups and subroutines for 6655638
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|
2478 |
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diff
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|
2479 // must be in same package before we try anything else |
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|
2480 if (!class1->is_same_class_package(class2->class_loader(), class2->name())) |
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|
2481 return false; |
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|
2482 |
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|
2483 // As long as there is an outer1.getEnclosingClass, |
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diff
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|
2484 // shift the search outward. |
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diff
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|
2485 instanceKlassHandle outer1 = class1; |
c89f86385056
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|
2486 for (;;) { |
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|
2487 // As we walk along, look for equalities between outer1 and class2. |
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|
2488 // Eventually, the walks will terminate as outer1 stops |
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|
2489 // at the top-level class around the original class. |
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|
2490 bool ignore_inner_is_member; |
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2491 Klass* next = outer1->compute_enclosing_class(&ignore_inner_is_member, |
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|
2492 CHECK_false); |
665
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|
2493 if (next == NULL) break; |
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|
2494 if (next == class2()) return true; |
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|
2495 outer1 = instanceKlassHandle(THREAD, next); |
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|
2496 } |
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|
2497 |
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|
2498 // Now do the same for class2. |
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|
2499 instanceKlassHandle outer2 = class2; |
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|
2500 for (;;) { |
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|
2501 bool ignore_inner_is_member; |
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2502 Klass* next = outer2->compute_enclosing_class(&ignore_inner_is_member, |
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|
2503 CHECK_false); |
665
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|
2504 if (next == NULL) break; |
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|
2505 // Might as well check the new outer against all available values. |
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|
2506 if (next == class1()) return true; |
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|
2507 if (next == outer1()) return true; |
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|
2508 outer2 = instanceKlassHandle(THREAD, next); |
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|
2509 } |
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|
2510 |
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|
2511 // If by this point we have not found an equality between the |
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|
2512 // two classes, we know they are in separate package members. |
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|
2513 return false; |
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|
2514 } |
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|
2515 |
0 | 2516 |
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2517 jint InstanceKlass::compute_modifier_flags(TRAPS) const { |
0 | 2518 jint access = access_flags().as_int(); |
2519 | |
2520 // But check if it happens to be member class. | |
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2521 instanceKlassHandle ik(THREAD, this); |
5967
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|
2522 InnerClassesIterator iter(ik); |
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
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|
2523 for (; !iter.done(); iter.next()) { |
f7c4174b33ba
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jiangli
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4739
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|
2524 int ioff = iter.inner_class_info_index(); |
f7c4174b33ba
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diff
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|
2525 // Inner class attribute can be zero, skip it. |
f7c4174b33ba
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2526 // Strange but true: JVM spec. allows null inner class refs. |
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2527 if (ioff == 0) continue; |
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2528 |
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2529 // only look at classes that are already loaded |
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2530 // since we are looking for the flags for our self. |
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2531 Symbol* inner_name = ik->constants()->klass_name_at(ioff); |
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2532 if ((ik->name() == inner_name)) { |
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2533 // This is really a member class. |
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2534 access = iter.inner_access_flags(); |
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2535 break; |
0 | 2536 } |
2537 } | |
2538 // Remember to strip ACC_SUPER bit | |
2539 return (access & (~JVM_ACC_SUPER)) & JVM_ACC_WRITTEN_FLAGS; | |
2540 } | |
2541 | |
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2542 jint InstanceKlass::jvmti_class_status() const { |
0 | 2543 jint result = 0; |
2544 | |
2545 if (is_linked()) { | |
2546 result |= JVMTI_CLASS_STATUS_VERIFIED | JVMTI_CLASS_STATUS_PREPARED; | |
2547 } | |
2548 | |
2549 if (is_initialized()) { | |
2550 assert(is_linked(), "Class status is not consistent"); | |
2551 result |= JVMTI_CLASS_STATUS_INITIALIZED; | |
2552 } | |
2553 if (is_in_error_state()) { | |
2554 result |= JVMTI_CLASS_STATUS_ERROR; | |
2555 } | |
2556 return result; | |
2557 } | |
2558 | |
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2559 Method* InstanceKlass::method_at_itable(Klass* holder, int index, TRAPS) { |
0 | 2560 itableOffsetEntry* ioe = (itableOffsetEntry*)start_of_itable(); |
2561 int method_table_offset_in_words = ioe->offset()/wordSize; | |
2562 int nof_interfaces = (method_table_offset_in_words - itable_offset_in_words()) | |
2563 / itableOffsetEntry::size(); | |
2564 | |
2565 for (int cnt = 0 ; ; cnt ++, ioe ++) { | |
605 | 2566 // If the interface isn't implemented by the receiver class, |
0 | 2567 // the VM should throw IncompatibleClassChangeError. |
2568 if (cnt >= nof_interfaces) { | |
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2569 THROW_NULL(vmSymbols::java_lang_IncompatibleClassChangeError()); |
0 | 2570 } |
2571 | |
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2572 Klass* ik = ioe->interface_klass(); |
0 | 2573 if (ik == holder) break; |
2574 } | |
2575 | |
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2576 itableMethodEntry* ime = ioe->first_method_entry(this); |
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2577 Method* m = ime[index].method(); |
0 | 2578 if (m == NULL) { |
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2579 THROW_NULL(vmSymbols::java_lang_AbstractMethodError()); |
0 | 2580 } |
2581 return m; | |
2582 } | |
2583 | |
2584 // On-stack replacement stuff | |
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2585 void InstanceKlass::add_osr_nmethod(nmethod* n) { |
0 | 2586 // only one compilation can be active |
2587 NEEDS_CLEANUP | |
2588 // This is a short non-blocking critical region, so the no safepoint check is ok. | |
2589 OsrList_lock->lock_without_safepoint_check(); | |
2590 assert(n->is_osr_method(), "wrong kind of nmethod"); | |
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2591 n->set_osr_link(osr_nmethods_head()); |
0 | 2592 set_osr_nmethods_head(n); |
1783 | 2593 // Raise the highest osr level if necessary |
2594 if (TieredCompilation) { | |
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2595 Method* m = n->method(); |
1783 | 2596 m->set_highest_osr_comp_level(MAX2(m->highest_osr_comp_level(), n->comp_level())); |
2597 } | |
0 | 2598 // Remember to unlock again |
2599 OsrList_lock->unlock(); | |
1783 | 2600 |
2601 // Get rid of the osr methods for the same bci that have lower levels. | |
2602 if (TieredCompilation) { | |
2603 for (int l = CompLevel_limited_profile; l < n->comp_level(); l++) { | |
2604 nmethod *inv = lookup_osr_nmethod(n->method(), n->osr_entry_bci(), l, true); | |
2605 if (inv != NULL && inv->is_in_use()) { | |
2606 inv->make_not_entrant(); | |
2607 } | |
2608 } | |
2609 } | |
0 | 2610 } |
2611 | |
2612 | |
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2613 void InstanceKlass::remove_osr_nmethod(nmethod* n) { |
0 | 2614 // This is a short non-blocking critical region, so the no safepoint check is ok. |
2615 OsrList_lock->lock_without_safepoint_check(); | |
2616 assert(n->is_osr_method(), "wrong kind of nmethod"); | |
2617 nmethod* last = NULL; | |
2618 nmethod* cur = osr_nmethods_head(); | |
1783 | 2619 int max_level = CompLevel_none; // Find the max comp level excluding n |
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2620 Method* m = n->method(); |
0 | 2621 // Search for match |
2622 while(cur != NULL && cur != n) { | |
1783 | 2623 if (TieredCompilation) { |
2624 // Find max level before n | |
2625 max_level = MAX2(max_level, cur->comp_level()); | |
2626 } | |
0 | 2627 last = cur; |
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2628 cur = cur->osr_link(); |
0 | 2629 } |
1783 | 2630 nmethod* next = NULL; |
0 | 2631 if (cur == n) { |
1783 | 2632 next = cur->osr_link(); |
0 | 2633 if (last == NULL) { |
2634 // Remove first element | |
1783 | 2635 set_osr_nmethods_head(next); |
0 | 2636 } else { |
1783 | 2637 last->set_osr_link(next); |
0 | 2638 } |
2639 } | |
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2640 n->set_osr_link(NULL); |
1783 | 2641 if (TieredCompilation) { |
2642 cur = next; | |
2643 while (cur != NULL) { | |
2644 // Find max level after n | |
2645 max_level = MAX2(max_level, cur->comp_level()); | |
2646 cur = cur->osr_link(); | |
2647 } | |
2648 m->set_highest_osr_comp_level(max_level); | |
2649 } | |
0 | 2650 // Remember to unlock again |
2651 OsrList_lock->unlock(); | |
2652 } | |
2653 | |
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2654 nmethod* InstanceKlass::lookup_osr_nmethod(Method* const m, int bci, int comp_level, bool match_level) const { |
0 | 2655 // This is a short non-blocking critical region, so the no safepoint check is ok. |
2656 OsrList_lock->lock_without_safepoint_check(); | |
2657 nmethod* osr = osr_nmethods_head(); | |
1783 | 2658 nmethod* best = NULL; |
0 | 2659 while (osr != NULL) { |
2660 assert(osr->is_osr_method(), "wrong kind of nmethod found in chain"); | |
1783 | 2661 // There can be a time when a c1 osr method exists but we are waiting |
2662 // for a c2 version. When c2 completes its osr nmethod we will trash | |
2663 // the c1 version and only be able to find the c2 version. However | |
2664 // while we overflow in the c1 code at back branches we don't want to | |
2665 // try and switch to the same code as we are already running | |
2666 | |
0 | 2667 if (osr->method() == m && |
2668 (bci == InvocationEntryBci || osr->osr_entry_bci() == bci)) { | |
1783 | 2669 if (match_level) { |
2670 if (osr->comp_level() == comp_level) { | |
2671 // Found a match - return it. | |
2672 OsrList_lock->unlock(); | |
2673 return osr; | |
2674 } | |
2675 } else { | |
2676 if (best == NULL || (osr->comp_level() > best->comp_level())) { | |
2677 if (osr->comp_level() == CompLevel_highest_tier) { | |
2678 // Found the best possible - return it. | |
2679 OsrList_lock->unlock(); | |
2680 return osr; | |
2681 } | |
2682 best = osr; | |
2683 } | |
2684 } | |
0 | 2685 } |
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2686 osr = osr->osr_link(); |
0 | 2687 } |
2688 OsrList_lock->unlock(); | |
1783 | 2689 if (best != NULL && best->comp_level() >= comp_level && match_level == false) { |
2690 return best; | |
2691 } | |
0 | 2692 return NULL; |
2693 } | |
2694 | |
2695 // ----------------------------------------------------------------------------------------------------- | |
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2696 // Printing |
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2697 |
0 | 2698 #ifndef PRODUCT |
2699 | |
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2700 #define BULLET " - " |
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2701 |
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2702 static const char* state_names[] = { |
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2703 "allocated", "loaded", "linked", "being_initialized", "fully_initialized", "initialization_error" |
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2704 }; |
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2705 |
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2706 void InstanceKlass::print_on(outputStream* st) const { |
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2707 assert(is_klass(), "must be klass"); |
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2708 Klass::print_on(st); |
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2709 |
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2710 st->print(BULLET"instance size: %d", size_helper()); st->cr(); |
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2711 st->print(BULLET"klass size: %d", size()); st->cr(); |
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2712 st->print(BULLET"access: "); access_flags().print_on(st); st->cr(); |
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2713 st->print(BULLET"state: "); st->print_cr(state_names[_init_state]); |
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2714 st->print(BULLET"name: "); name()->print_value_on(st); st->cr(); |
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2715 st->print(BULLET"super: "); super()->print_value_on_maybe_null(st); st->cr(); |
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2716 st->print(BULLET"sub: "); |
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2717 Klass* sub = subklass(); |
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2718 int n; |
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2719 for (n = 0; sub != NULL; n++, sub = sub->next_sibling()) { |
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2720 if (n < MaxSubklassPrintSize) { |
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2721 sub->print_value_on(st); |
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2722 st->print(" "); |
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2723 } |
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2724 } |
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2725 if (n >= MaxSubklassPrintSize) st->print("(%d more klasses...)", n - MaxSubklassPrintSize); |
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2726 st->cr(); |
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2727 |
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2728 if (is_interface()) { |
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2729 st->print_cr(BULLET"nof implementors: %d", nof_implementors()); |
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2730 if (nof_implementors() == 1) { |
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2731 st->print_cr(BULLET"implementor: "); |
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2732 st->print(" "); |
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2733 implementor()->print_value_on(st); |
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2734 st->cr(); |
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2735 } |
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2736 } |
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2737 |
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2738 st->print(BULLET"arrays: "); array_klasses()->print_value_on_maybe_null(st); st->cr(); |
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2739 st->print(BULLET"methods: "); methods()->print_value_on(st); st->cr(); |
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2740 if (Verbose) { |
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2741 Array<Method*>* method_array = methods(); |
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2742 for(int i = 0; i < method_array->length(); i++) { |
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2743 st->print("%d : ", i); method_array->at(i)->print_value(); st->cr(); |
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2744 } |
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2745 } |
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2746 st->print(BULLET"method ordering: "); method_ordering()->print_value_on(st); st->cr(); |
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2747 st->print(BULLET"local interfaces: "); local_interfaces()->print_value_on(st); st->cr(); |
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2748 st->print(BULLET"trans. interfaces: "); transitive_interfaces()->print_value_on(st); st->cr(); |
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2749 st->print(BULLET"constants: "); constants()->print_value_on(st); st->cr(); |
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2750 if (class_loader_data() != NULL) { |
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2751 st->print(BULLET"class loader data: "); |
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2752 class_loader_data()->print_value_on(st); |
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2753 st->cr(); |
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2754 } |
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2755 st->print(BULLET"protection domain: "); ((InstanceKlass*)this)->protection_domain()->print_value_on(st); st->cr(); |
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2756 st->print(BULLET"host class: "); host_klass()->print_value_on_maybe_null(st); st->cr(); |
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2757 st->print(BULLET"signers: "); signers()->print_value_on(st); st->cr(); |
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2758 st->print(BULLET"init_lock: "); ((oop)init_lock())->print_value_on(st); st->cr(); |
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2759 if (source_file_name() != NULL) { |
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2760 st->print(BULLET"source file: "); |
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2761 source_file_name()->print_value_on(st); |
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2762 st->cr(); |
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|
2763 } |
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2764 if (source_debug_extension() != NULL) { |
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2765 st->print(BULLET"source debug extension: "); |
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2766 st->print("%s", source_debug_extension()); |
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2767 st->cr(); |
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|
2768 } |
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2769 st->print(BULLET"annotations: "); annotations()->print_value_on(st); st->cr(); |
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2770 { |
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2771 ResourceMark rm; |
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|
2772 // PreviousVersionInfo objects returned via PreviousVersionWalker |
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2773 // contain a GrowableArray of handles. We have to clean up the |
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2774 // GrowableArray _after_ the PreviousVersionWalker destructor |
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2775 // has destroyed the handles. |
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|
2776 { |
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|
2777 bool have_pv = false; |
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|
2778 PreviousVersionWalker pvw((InstanceKlass*)this); |
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2779 for (PreviousVersionInfo * pv_info = pvw.next_previous_version(); |
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2780 pv_info != NULL; pv_info = pvw.next_previous_version()) { |
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2781 if (!have_pv) |
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2782 st->print(BULLET"previous version: "); |
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2783 have_pv = true; |
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2784 pv_info->prev_constant_pool_handle()()->print_value_on(st); |
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|
2785 } |
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|
2786 if (have_pv) st->cr(); |
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2787 } // pvw is cleaned up |
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|
2788 } // rm is cleaned up |
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|
2789 |
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|
2790 if (generic_signature() != NULL) { |
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|
2791 st->print(BULLET"generic signature: "); |
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|
2792 generic_signature()->print_value_on(st); |
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|
2793 st->cr(); |
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|
2794 } |
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|
2795 st->print(BULLET"inner classes: "); inner_classes()->print_value_on(st); st->cr(); |
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|
2796 st->print(BULLET"java mirror: "); java_mirror()->print_value_on(st); st->cr(); |
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|
2797 st->print(BULLET"vtable length %d (start addr: " INTPTR_FORMAT ")", vtable_length(), start_of_vtable()); st->cr(); |
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|
2798 st->print(BULLET"itable length %d (start addr: " INTPTR_FORMAT ")", itable_length(), start_of_itable()); st->cr(); |
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|
2799 st->print_cr(BULLET"---- static fields (%d words):", static_field_size()); |
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|
2800 FieldPrinter print_static_field(st); |
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|
2801 ((InstanceKlass*)this)->do_local_static_fields(&print_static_field); |
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2802 st->print_cr(BULLET"---- non-static fields (%d words):", nonstatic_field_size()); |
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|
2803 FieldPrinter print_nonstatic_field(st); |
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|
2804 ((InstanceKlass*)this)->do_nonstatic_fields(&print_nonstatic_field); |
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|
2805 |
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|
2806 st->print(BULLET"non-static oop maps: "); |
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|
2807 OopMapBlock* map = start_of_nonstatic_oop_maps(); |
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|
2808 OopMapBlock* end_map = map + nonstatic_oop_map_count(); |
da91efe96a93
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|
2809 while (map < end_map) { |
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|
2810 st->print("%d-%d ", map->offset(), map->offset() + heapOopSize*(map->count() - 1)); |
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|
2811 map++; |
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|
2812 } |
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|
2813 st->cr(); |
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|
2814 } |
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|
2815 |
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|
2816 #endif //PRODUCT |
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|
2817 |
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|
2818 void InstanceKlass::print_value_on(outputStream* st) const { |
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|
2819 assert(is_klass(), "must be klass"); |
da91efe96a93
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|
2820 name()->print_value_on(st); |
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|
2821 } |
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|
2822 |
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6964458: Reimplement class meta-data storage to use native memory
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|
2823 #ifndef PRODUCT |
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|
2824 |
0 | 2825 void FieldPrinter::do_field(fieldDescriptor* fd) { |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
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diff
changeset
|
2826 _st->print(BULLET); |
2376
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
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diff
changeset
|
2827 if (_obj == NULL) { |
0 | 2828 fd->print_on(_st); |
2829 _st->cr(); | |
2830 } else { | |
2831 fd->print_on_for(_st, _obj); | |
2832 _st->cr(); | |
2833 } | |
2834 } | |
2835 | |
2836 | |
6725
da91efe96a93
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coleenp
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|
2837 void InstanceKlass::oop_print_on(oop obj, outputStream* st) { |
0 | 2838 Klass::oop_print_on(obj, st); |
2839 | |
6725
da91efe96a93
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|
2840 if (this == SystemDictionary::String_klass()) { |
0 | 2841 typeArrayOop value = java_lang_String::value(obj); |
2842 juint offset = java_lang_String::offset(obj); | |
2843 juint length = java_lang_String::length(obj); | |
2844 if (value != NULL && | |
2845 value->is_typeArray() && | |
2846 offset <= (juint) value->length() && | |
2847 offset + length <= (juint) value->length()) { | |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
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parents:
605
diff
changeset
|
2848 st->print(BULLET"string: "); |
0 | 2849 Handle h_obj(obj); |
2850 java_lang_String::print(h_obj, st); | |
2851 st->cr(); | |
2852 if (!WizardMode) return; // that is enough | |
2853 } | |
2854 } | |
2855 | |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2856 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
|
2857 FieldPrinter print_field(st, obj); |
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2357
diff
changeset
|
2858 do_nonstatic_fields(&print_field); |
0 | 2859 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
2860 if (this == SystemDictionary::Class_klass()) { |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
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605
diff
changeset
|
2861 st->print(BULLET"signature: "); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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diff
changeset
|
2862 java_lang_Class::print_signature(obj, st); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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diff
changeset
|
2863 st->cr(); |
6725
da91efe96a93
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changeset
|
2864 Klass* mirrored_klass = java_lang_Class::as_Klass(obj); |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2865 st->print(BULLET"fake entry for mirror: "); |
6725
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changeset
|
2866 mirrored_klass->print_value_on_maybe_null(st); |
0 | 2867 st->cr(); |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
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parents:
605
diff
changeset
|
2868 st->print(BULLET"fake entry resolved_constructor: "); |
6725
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diff
changeset
|
2869 Method* ctor = java_lang_Class::resolved_constructor(obj); |
da91efe96a93
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|
2870 ctor->print_value_on_maybe_null(st); |
da91efe96a93
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|
2871 Klass* array_klass = java_lang_Class::array_klass(obj); |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
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parents:
605
diff
changeset
|
2872 st->cr(); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
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diff
changeset
|
2873 st->print(BULLET"fake entry for array: "); |
6725
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changeset
|
2874 array_klass->print_value_on_maybe_null(st); |
0 | 2875 st->cr(); |
2376
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
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2357
diff
changeset
|
2876 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
|
2877 st->print_cr(BULLET"fake entry for static_oop_field_count: %d", java_lang_Class::static_oop_field_count(obj)); |
6725
da91efe96a93
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|
2878 Klass* real_klass = java_lang_Class::as_Klass(obj); |
da91efe96a93
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|
2879 if (real_klass != NULL && real_klass->oop_is_instance()) { |
da91efe96a93
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coleenp
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diff
changeset
|
2880 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
|
2881 } |
6725
da91efe96a93
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|
2882 } else if (this == SystemDictionary::MethodType_klass()) { |
1039
987e948ebbc8
6815692: method handle code needs some cleanup (post-6655638)
jrose
parents:
997
diff
changeset
|
2883 st->print(BULLET"signature: "); |
2357
8033953d67ff
7012648: move JSR 292 to package java.lang.invoke and adjust names
jrose
parents:
2334
diff
changeset
|
2884 java_lang_invoke_MethodType::print_signature(obj, st); |
1039
987e948ebbc8
6815692: method handle code needs some cleanup (post-6655638)
jrose
parents:
997
diff
changeset
|
2885 st->cr(); |
0 | 2886 } |
2887 } | |
2888 | |
1155
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1144
diff
changeset
|
2889 #endif //PRODUCT |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1144
diff
changeset
|
2890 |
6725
da91efe96a93
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diff
changeset
|
2891 void InstanceKlass::oop_print_value_on(oop obj, outputStream* st) { |
0 | 2892 st->print("a "); |
2893 name()->print_value_on(st); | |
2894 obj->print_address_on(st); | |
6725
da91efe96a93
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coleenp
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6266
diff
changeset
|
2895 if (this == SystemDictionary::String_klass() |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
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605
diff
changeset
|
2896 && java_lang_String::value(obj) != NULL) { |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2897 ResourceMark rm; |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2898 int len = java_lang_String::length(obj); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2899 int plen = (len < 24 ? len : 12); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2900 char* str = java_lang_String::as_utf8_string(obj, 0, plen); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2901 st->print(" = \"%s\"", str); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2902 if (len > plen) |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2903 st->print("...[%d]", len); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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2904 } else if (this == SystemDictionary::Class_klass()) { |
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2905 Klass* k = java_lang_Class::as_Klass(obj); |
665
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2906 st->print(" = "); |
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|
2907 if (k != NULL) { |
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|
2908 k->print_value_on(st); |
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|
2909 } else { |
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|
2910 const char* tname = type2name(java_lang_Class::primitive_type(obj)); |
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2911 st->print("%s", tname ? tname : "type?"); |
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|
2912 } |
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2913 } else if (this == SystemDictionary::MethodType_klass()) { |
1039
987e948ebbc8
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2914 st->print(" = "); |
2357
8033953d67ff
7012648: move JSR 292 to package java.lang.invoke and adjust names
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2915 java_lang_invoke_MethodType::print_signature(obj, st); |
665
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2916 } else if (java_lang_boxing_object::is_instance(obj)) { |
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|
2917 st->print(" = "); |
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|
2918 java_lang_boxing_object::print(obj, st); |
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2919 } else if (this == SystemDictionary::LambdaForm_klass()) { |
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2920 oop vmentry = java_lang_invoke_LambdaForm::vmentry(obj); |
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2921 if (vmentry != NULL) { |
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|
2922 st->print(" => "); |
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|
2923 vmentry->print_value_on(st); |
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2924 } |
6725
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2925 } else if (this == SystemDictionary::MemberName_klass()) { |
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2926 Metadata* vmtarget = java_lang_invoke_MemberName::vmtarget(obj); |
6266
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2927 if (vmtarget != NULL) { |
1d7922586cf6
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parents:
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|
2928 st->print(" = "); |
1d7922586cf6
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|
2929 vmtarget->print_value_on(st); |
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|
2930 } else { |
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|
2931 java_lang_invoke_MemberName::clazz(obj)->print_value_on(st); |
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|
2932 st->print("."); |
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|
2933 java_lang_invoke_MemberName::name(obj)->print_value_on(st); |
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2934 } |
665
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2935 } |
0 | 2936 } |
2937 | |
6725
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2938 const char* InstanceKlass::internal_name() const { |
0 | 2939 return external_name(); |
2940 } | |
2941 | |
2942 // Verification | |
2943 | |
2944 class VerifyFieldClosure: public OopClosure { | |
113
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|
2945 protected: |
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|
2946 template <class T> void do_oop_work(T* p) { |
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2947 oop obj = oopDesc::load_decode_heap_oop(p); |
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2948 if (!obj->is_oop_or_null()) { |
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|
2949 tty->print_cr("Failed: " PTR_FORMAT " -> " PTR_FORMAT, p, (address)obj); |
0 | 2950 Universe::print(); |
2951 guarantee(false, "boom"); | |
2952 } | |
2953 } | |
113
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|
2954 public: |
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|
2955 virtual void do_oop(oop* p) { VerifyFieldClosure::do_oop_work(p); } |
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2956 virtual void do_oop(narrowOop* p) { VerifyFieldClosure::do_oop_work(p); } |
0 | 2957 }; |
2958 | |
6725
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2959 void InstanceKlass::verify_on(outputStream* st) { |
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2960 Klass::verify_on(st); |
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2961 Thread *thread = Thread::current(); |
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|
2962 |
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|
2963 #ifndef PRODUCT |
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2964 // Avoid redundant verifies |
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2965 if (_verify_count == Universe::verify_count()) return; |
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2966 _verify_count = Universe::verify_count(); |
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2967 #endif |
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2968 // Verify that klass is present in SystemDictionary |
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2969 if (is_loaded() && !is_anonymous()) { |
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2970 Symbol* h_name = name(); |
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2971 SystemDictionary::verify_obj_klass_present(h_name, class_loader_data()); |
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|
2972 } |
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|
2973 |
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2974 // Verify static fields |
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|
2975 VerifyFieldClosure blk; |
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|
2976 |
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|
2977 // Verify vtables |
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|
2978 if (is_linked()) { |
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|
2979 ResourceMark rm(thread); |
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|
2980 // $$$ This used to be done only for m/s collections. Doing it |
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2981 // always seemed a valid generalization. (DLD -- 6/00) |
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|
2982 vtable()->verify(st); |
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|
2983 } |
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|
2984 |
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|
2985 // Verify first subklass |
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|
2986 if (subklass_oop() != NULL) { |
da91efe96a93
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|
2987 guarantee(subklass_oop()->is_metadata(), "should be in metaspace"); |
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|
2988 guarantee(subklass_oop()->is_klass(), "should be klass"); |
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|
2989 } |
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|
2990 |
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|
2991 // Verify siblings |
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|
2992 Klass* super = this->super(); |
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|
2993 Klass* sib = next_sibling(); |
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|
2994 if (sib != NULL) { |
da91efe96a93
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diff
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|
2995 if (sib == this) { |
da91efe96a93
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|
2996 fatal(err_msg("subclass points to itself " PTR_FORMAT, sib)); |
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|
2997 } |
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|
2998 |
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|
2999 guarantee(sib->is_metadata(), "should be in metaspace"); |
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|
3000 guarantee(sib->is_klass(), "should be klass"); |
da91efe96a93
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|
3001 guarantee(sib->super() == super, "siblings should have same superklass"); |
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|
3002 } |
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|
3003 |
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|
3004 // Verify implementor fields |
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|
3005 Klass* im = implementor(); |
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|
3006 if (im != NULL) { |
da91efe96a93
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|
3007 guarantee(is_interface(), "only interfaces should have implementor set"); |
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|
3008 guarantee(im->is_klass(), "should be klass"); |
6983 | 3009 guarantee(!im->is_interface() || im == this, |
6725
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|
3010 "implementors cannot be interfaces"); |
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|
3011 } |
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|
3012 |
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|
3013 // Verify local interfaces |
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diff
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|
3014 if (local_interfaces()) { |
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|
3015 Array<Klass*>* local_interfaces = this->local_interfaces(); |
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|
3016 for (int j = 0; j < local_interfaces->length(); j++) { |
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|
3017 Klass* e = local_interfaces->at(j); |
6983 | 3018 guarantee(e->is_klass() && e->is_interface(), "invalid local interface"); |
6725
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|
3019 } |
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|
3020 } |
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|
3021 |
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|
3022 // Verify transitive interfaces |
da91efe96a93
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|
3023 if (transitive_interfaces() != NULL) { |
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|
3024 Array<Klass*>* transitive_interfaces = this->transitive_interfaces(); |
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|
3025 for (int j = 0; j < transitive_interfaces->length(); j++) { |
da91efe96a93
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|
3026 Klass* e = transitive_interfaces->at(j); |
6983 | 3027 guarantee(e->is_klass() && e->is_interface(), "invalid transitive interface"); |
6725
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|
3028 } |
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|
3029 } |
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|
3030 |
da91efe96a93
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|
3031 // Verify methods |
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|
3032 if (methods() != NULL) { |
da91efe96a93
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|
3033 Array<Method*>* methods = this->methods(); |
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|
3034 for (int j = 0; j < methods->length(); j++) { |
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|
3035 guarantee(methods->at(j)->is_metadata(), "should be in metaspace"); |
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|
3036 guarantee(methods->at(j)->is_method(), "non-method in methods array"); |
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|
3037 } |
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|
3038 for (int j = 0; j < methods->length() - 1; j++) { |
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|
3039 Method* m1 = methods->at(j); |
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|
3040 Method* m2 = methods->at(j + 1); |
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3041 guarantee(m1->name()->fast_compare(m2->name()) <= 0, "methods not sorted correctly"); |
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3042 } |
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3043 } |
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3044 |
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3045 // Verify method ordering |
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3046 if (method_ordering() != NULL) { |
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3047 Array<int>* method_ordering = this->method_ordering(); |
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3048 int length = method_ordering->length(); |
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3049 if (JvmtiExport::can_maintain_original_method_order() || |
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3050 (UseSharedSpaces && length != 0)) { |
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3051 guarantee(length == methods()->length(), "invalid method ordering length"); |
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3052 jlong sum = 0; |
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3053 for (int j = 0; j < length; j++) { |
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3054 int original_index = method_ordering->at(j); |
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3055 guarantee(original_index >= 0, "invalid method ordering index"); |
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3056 guarantee(original_index < length, "invalid method ordering index"); |
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3057 sum += original_index; |
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3058 } |
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3059 // Verify sum of indices 0,1,...,length-1 |
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3060 guarantee(sum == ((jlong)length*(length-1))/2, "invalid method ordering sum"); |
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3061 } else { |
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3062 guarantee(length == 0, "invalid method ordering length"); |
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3063 } |
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|
3064 } |
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|
3065 |
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3066 // Verify JNI static field identifiers |
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3067 if (jni_ids() != NULL) { |
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3068 jni_ids()->verify(this); |
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3069 } |
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|
3070 |
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3071 // Verify other fields |
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3072 if (array_klasses() != NULL) { |
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3073 guarantee(array_klasses()->is_metadata(), "should be in metaspace"); |
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3074 guarantee(array_klasses()->is_klass(), "should be klass"); |
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3075 } |
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3076 if (constants() != NULL) { |
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3077 guarantee(constants()->is_metadata(), "should be in metaspace"); |
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3078 guarantee(constants()->is_constantPool(), "should be constant pool"); |
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|
3079 } |
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|
3080 if (protection_domain() != NULL) { |
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|
3081 guarantee(protection_domain()->is_oop(), "should be oop"); |
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|
3082 } |
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3083 if (host_klass() != NULL) { |
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|
3084 guarantee(host_klass()->is_metadata(), "should be in metaspace"); |
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3085 guarantee(host_klass()->is_klass(), "should be klass"); |
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|
3086 } |
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|
3087 if (signers() != NULL) { |
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3088 guarantee(signers()->is_objArray(), "should be obj array"); |
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|
3089 } |
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|
3090 } |
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|
3091 |
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|
3092 void InstanceKlass::oop_verify_on(oop obj, outputStream* st) { |
0 | 3093 Klass::oop_verify_on(obj, st); |
3094 VerifyFieldClosure blk; | |
6725
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3095 obj->oop_iterate_no_header(&blk); |
0 | 3096 } |
3097 | |
6725
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3098 |
113
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|
3099 // JNIid class for jfieldIDs only |
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|
3100 // Note to reviewers: |
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3101 // These JNI functions are just moved over to column 1 and not changed |
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3102 // in the compressed oops workspace. |
6725
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3103 JNIid::JNIid(Klass* holder, int offset, JNIid* next) { |
113
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3104 _holder = holder; |
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3105 _offset = offset; |
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3106 _next = next; |
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|
3107 debug_only(_is_static_field_id = false;) |
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3108 } |
0 | 3109 |
3110 | |
113
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|
3111 JNIid* JNIid::find(int offset) { |
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|
3112 JNIid* current = this; |
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|
3113 while (current != NULL) { |
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|
3114 if (current->offset() == offset) return current; |
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|
3115 current = current->next(); |
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|
3116 } |
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diff
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|
3117 return NULL; |
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|
3118 } |
0 | 3119 |
3120 void JNIid::deallocate(JNIid* current) { | |
113
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|
3121 while (current != NULL) { |
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|
3122 JNIid* next = current->next(); |
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|
3123 delete current; |
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|
3124 current = next; |
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|
3125 } |
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|
3126 } |
0 | 3127 |
3128 | |
6725
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|
3129 void JNIid::verify(Klass* holder) { |
6735
aed758eda82a
7195833: NPG: Rename instanceClassLoaderKlass, instanceRefKlass and instanceMirrorKlass
coleenp
parents:
6733
diff
changeset
|
3130 int first_field_offset = InstanceMirrorKlass::offset_of_static_fields(); |
113
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|
3131 int end_field_offset; |
6725
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3132 end_field_offset = first_field_offset + (InstanceKlass::cast(holder)->static_field_size() * wordSize); |
0 | 3133 |
113
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|
3134 JNIid* current = this; |
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|
3135 while (current != NULL) { |
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diff
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|
3136 guarantee(current->holder() == holder, "Invalid klass in JNIid"); |
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diff
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|
3137 #ifdef ASSERT |
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|
3138 int o = current->offset(); |
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|
3139 if (current->is_static_field_id()) { |
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diff
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|
3140 guarantee(o >= first_field_offset && o < end_field_offset, "Invalid static field offset in JNIid"); |
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|
3141 } |
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diff
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|
3142 #endif |
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|
3143 current = current->next(); |
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|
3144 } |
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|
3145 } |
0 | 3146 |
3147 | |
3148 #ifdef ASSERT | |
6725
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|
3149 void InstanceKlass::set_init_state(ClassState state) { |
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3150 bool good_state = is_shared() ? (_init_state <= state) |
113
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|
3151 : (_init_state < state); |
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|
3152 assert(good_state || state == allocated, "illegal state transition"); |
4739
52b5d32fbfaf
7117052: instanceKlass::_init_state can be u1 type
coleenp
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4006
diff
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|
3153 _init_state = (u1)state; |
113
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|
3154 } |
0 | 3155 #endif |
3156 | |
3157 | |
3158 // RedefineClasses() support for previous versions: | |
3159 | |
6725
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|
3160 // Purge previous versions |
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|
3161 static void purge_previous_versions_internal(InstanceKlass* ik, int emcp_method_count) { |
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|
3162 if (ik->previous_versions() != NULL) { |
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|
3163 // This klass has previous versions so see what we can cleanup |
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|
3164 // while it is safe to do so. |
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|
3165 |
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|
3166 int deleted_count = 0; // leave debugging breadcrumbs |
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|
3167 int live_count = 0; |
da91efe96a93
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|
3168 ClassLoaderData* loader_data = ik->class_loader_data() == NULL ? |
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|
3169 ClassLoaderData::the_null_class_loader_data() : |
da91efe96a93
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|
3170 ik->class_loader_data(); |
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|
3171 |
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|
3172 // RC_TRACE macro has an embedded ResourceMark |
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|
3173 RC_TRACE(0x00000200, ("purge: %s: previous version length=%d", |
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|
3174 ik->external_name(), ik->previous_versions()->length())); |
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|
3175 |
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|
3176 for (int i = ik->previous_versions()->length() - 1; i >= 0; i--) { |
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|
3177 // check the previous versions array |
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3178 PreviousVersionNode * pv_node = ik->previous_versions()->at(i); |
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3179 ConstantPool* cp_ref = pv_node->prev_constant_pool(); |
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3180 assert(cp_ref != NULL, "cp ref was unexpectedly cleared"); |
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3181 |
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3182 ConstantPool* pvcp = cp_ref; |
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3183 if (!pvcp->on_stack()) { |
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3184 // If the constant pool isn't on stack, none of the methods |
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3185 // are executing. Delete all the methods, the constant pool and |
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3186 // and this previous version node. |
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3187 GrowableArray<Method*>* method_refs = pv_node->prev_EMCP_methods(); |
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3188 if (method_refs != NULL) { |
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3189 for (int j = method_refs->length() - 1; j >= 0; j--) { |
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3190 Method* method = method_refs->at(j); |
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3191 assert(method != NULL, "method ref was unexpectedly cleared"); |
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3192 method_refs->remove_at(j); |
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3193 // method will be freed with associated class. |
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3194 } |
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3195 } |
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3196 // Remove the constant pool |
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3197 delete pv_node; |
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3198 // Since we are traversing the array backwards, we don't have to |
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3199 // do anything special with the index. |
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3200 ik->previous_versions()->remove_at(i); |
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3201 deleted_count++; |
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3202 continue; |
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3203 } else { |
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3204 RC_TRACE(0x00000200, ("purge: previous version @%d is alive", i)); |
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3205 assert(pvcp->pool_holder() != NULL, "Constant pool with no holder"); |
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3206 guarantee (!loader_data->is_unloading(), "unloaded classes can't be on the stack"); |
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3207 live_count++; |
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3208 } |
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3209 |
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3210 // At least one method is live in this previous version, clean out |
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3211 // the others or mark them as obsolete. |
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3212 GrowableArray<Method*>* method_refs = pv_node->prev_EMCP_methods(); |
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3213 if (method_refs != NULL) { |
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3214 RC_TRACE(0x00000200, ("purge: previous methods length=%d", |
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3215 method_refs->length())); |
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3216 for (int j = method_refs->length() - 1; j >= 0; j--) { |
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3217 Method* method = method_refs->at(j); |
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3218 assert(method != NULL, "method ref was unexpectedly cleared"); |
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3219 |
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3220 // Remove the emcp method if it's not executing |
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3221 // If it's been made obsolete by a redefinition of a non-emcp |
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3222 // method, mark it as obsolete but leave it to clean up later. |
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3223 if (!method->on_stack()) { |
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3224 method_refs->remove_at(j); |
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3225 } else if (emcp_method_count == 0) { |
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3226 method->set_is_obsolete(); |
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3227 } else { |
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3228 // RC_TRACE macro has an embedded ResourceMark |
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3229 RC_TRACE(0x00000200, |
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3230 ("purge: %s(%s): prev method @%d in version @%d is alive", |
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3231 method->name()->as_C_string(), |
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3232 method->signature()->as_C_string(), j, i)); |
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3233 } |
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3234 } |
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|
3235 } |
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|
3236 } |
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3237 assert(ik->previous_versions()->length() == live_count, "sanity check"); |
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3238 RC_TRACE(0x00000200, |
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3239 ("purge: previous version stats: live=%d, deleted=%d", live_count, |
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3240 deleted_count)); |
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|
3241 } |
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3242 } |
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3243 |
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3244 // External interface for use during class unloading. |
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3245 void InstanceKlass::purge_previous_versions(InstanceKlass* ik) { |
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3246 // Call with >0 emcp methods since they are not currently being redefined. |
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3247 purge_previous_versions_internal(ik, 1); |
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|
3248 } |
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|
3249 |
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|
3250 |
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3251 // Potentially add an information node that contains pointers to the |
0 | 3252 // interesting parts of the previous version of the_class. |
6725
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3253 // This is also where we clean out any unused references. |
977
74a5db69c1fe
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|
3254 // Note that while we delete nodes from the _previous_versions |
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|
3255 // array, we never delete the array itself until the klass is |
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|
3256 // unloaded. The has_been_redefined() query depends on that fact. |
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|
3257 // |
6725
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|
3258 void InstanceKlass::add_previous_version(instanceKlassHandle ikh, |
113
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|
3259 BitMap* emcp_methods, int emcp_method_count) { |
0 | 3260 assert(Thread::current()->is_VM_thread(), |
113
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|
3261 "only VMThread can add previous versions"); |
0 | 3262 |
3263 if (_previous_versions == NULL) { | |
3264 // This is the first previous version so make some space. | |
3265 // Start with 2 elements under the assumption that the class | |
3266 // won't be redefined much. | |
6197 | 3267 _previous_versions = new (ResourceObj::C_HEAP, mtClass) |
0 | 3268 GrowableArray<PreviousVersionNode *>(2, true); |
3269 } | |
3270 | |
6725
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3271 ConstantPool* cp_ref = ikh->constants(); |
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3272 |
0 | 3273 // RC_TRACE macro has an embedded ResourceMark |
6725
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3274 RC_TRACE(0x00000400, ("adding previous version ref for %s @%d, EMCP_cnt=%d " |
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3275 "on_stack=%d", |
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3276 ikh->external_name(), _previous_versions->length(), emcp_method_count, |
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|
3277 cp_ref->on_stack())); |
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|
3278 |
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3279 // If the constant pool for this previous version of the class |
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3280 // is not marked as being on the stack, then none of the methods |
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3281 // in this previous version of the class are on the stack so |
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3282 // we don't need to create a new PreviousVersionNode. However, |
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3283 // we still need to examine older previous versions below. |
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|
3284 Array<Method*>* old_methods = ikh->methods(); |
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3285 |
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3286 if (cp_ref->on_stack()) { |
0 | 3287 PreviousVersionNode * pv_node = NULL; |
3288 if (emcp_method_count == 0) { | |
6725
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3289 // non-shared ConstantPool gets a reference |
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3290 pv_node = new PreviousVersionNode(cp_ref, !cp_ref->is_shared(), NULL); |
0 | 3291 RC_TRACE(0x00000400, |
6725
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3292 ("add: all methods are obsolete; flushing any EMCP refs")); |
0 | 3293 } else { |
3294 int local_count = 0; | |
6725
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3295 GrowableArray<Method*>* method_refs = new (ResourceObj::C_HEAP, mtClass) |
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3296 GrowableArray<Method*>(emcp_method_count, true); |
0 | 3297 for (int i = 0; i < old_methods->length(); i++) { |
3298 if (emcp_methods->at(i)) { | |
6725
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3299 // this old method is EMCP. Save it only if it's on the stack |
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3300 Method* old_method = old_methods->at(i); |
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3301 if (old_method->on_stack()) { |
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|
3302 method_refs->append(old_method); |
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|
3303 } |
0 | 3304 if (++local_count >= emcp_method_count) { |
3305 // no more EMCP methods so bail out now | |
3306 break; | |
3307 } | |
3308 } | |
3309 } | |
6725
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3310 // non-shared ConstantPool gets a reference |
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3311 pv_node = new PreviousVersionNode(cp_ref, !cp_ref->is_shared(), method_refs); |
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|
3312 } |
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3313 // append new previous version. |
0 | 3314 _previous_versions->append(pv_node); |
6725
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|
3315 } |
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|
3316 |
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|
3317 // Since the caller is the VMThread and we are at a safepoint, this |
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|
3318 // is a good time to clear out unused references. |
0 | 3319 |
3320 RC_TRACE(0x00000400, ("add: previous version length=%d", | |
3321 _previous_versions->length())); | |
3322 | |
6725
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3323 // Purge previous versions not executing on the stack |
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3324 purge_previous_versions_internal(this, emcp_method_count); |
0 | 3325 |
3326 int obsolete_method_count = old_methods->length() - emcp_method_count; | |
3327 | |
3328 if (emcp_method_count != 0 && obsolete_method_count != 0 && | |
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3329 _previous_versions->length() > 0) { |
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3330 // We have a mix of obsolete and EMCP methods so we have to |
0 | 3331 // clear out any matching EMCP method entries the hard way. |
3332 int local_count = 0; | |
3333 for (int i = 0; i < old_methods->length(); i++) { | |
3334 if (!emcp_methods->at(i)) { | |
3335 // only obsolete methods are interesting | |
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3336 Method* old_method = old_methods->at(i); |
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3337 Symbol* m_name = old_method->name(); |
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3338 Symbol* m_signature = old_method->signature(); |
0 | 3339 |
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3340 // we might not have added the last entry |
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3341 for (int j = _previous_versions->length() - 1; j >= 0; j--) { |
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3342 // check the previous versions array for non executing obsolete methods |
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3343 PreviousVersionNode * pv_node = _previous_versions->at(j); |
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3344 |
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3345 GrowableArray<Method*>* method_refs = pv_node->prev_EMCP_methods(); |
0 | 3346 if (method_refs == NULL) { |
3347 // We have run into a PreviousVersion generation where | |
3348 // all methods were made obsolete during that generation's | |
3349 // RedefineClasses() operation. At the time of that | |
3350 // operation, all EMCP methods were flushed so we don't | |
3351 // have to go back any further. | |
3352 // | |
3353 // A NULL method_refs is different than an empty method_refs. | |
3354 // We cannot infer any optimizations about older generations | |
3355 // from an empty method_refs for the current generation. | |
3356 break; | |
3357 } | |
3358 | |
3359 for (int k = method_refs->length() - 1; k >= 0; k--) { | |
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3360 Method* method = method_refs->at(k); |
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3361 |
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3362 if (!method->is_obsolete() && |
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3363 method->name() == m_name && |
0 | 3364 method->signature() == m_signature) { |
3365 // The current RedefineClasses() call has made all EMCP | |
3366 // versions of this method obsolete so mark it as obsolete | |
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3367 // and remove the reference. |
0 | 3368 RC_TRACE(0x00000400, |
3369 ("add: %s(%s): flush obsolete method @%d in version @%d", | |
3370 m_name->as_C_string(), m_signature->as_C_string(), k, j)); | |
3371 | |
3372 method->set_is_obsolete(); | |
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3373 // Leave obsolete methods on the previous version list to |
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3374 // clean up later. |
0 | 3375 break; |
3376 } | |
3377 } | |
3378 | |
3379 // The previous loop may not find a matching EMCP method, but | |
3380 // that doesn't mean that we can optimize and not go any | |
3381 // further back in the PreviousVersion generations. The EMCP | |
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3382 // method for this generation could have already been deleted, |
0 | 3383 // but there still may be an older EMCP method that has not |
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3384 // been deleted. |
0 | 3385 } |
3386 | |
3387 if (++local_count >= obsolete_method_count) { | |
3388 // no more obsolete methods so bail out now | |
3389 break; | |
3390 } | |
3391 } | |
3392 } | |
3393 } | |
3394 } // end add_previous_version() | |
3395 | |
3396 | |
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3397 // Determine if InstanceKlass has a previous version. |
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3398 bool InstanceKlass::has_previous_version() const { |
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3399 return (_previous_versions != NULL && _previous_versions->length() > 0); |
0 | 3400 } // end has_previous_version() |
3401 | |
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3402 |
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3403 Method* InstanceKlass::method_with_idnum(int idnum) { |
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3404 Method* m = NULL; |
0 | 3405 if (idnum < methods()->length()) { |
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3406 m = methods()->at(idnum); |
0 | 3407 } |
3408 if (m == NULL || m->method_idnum() != idnum) { | |
3409 for (int index = 0; index < methods()->length(); ++index) { | |
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3410 m = methods()->at(index); |
0 | 3411 if (m->method_idnum() == idnum) { |
3412 return m; | |
3413 } | |
3414 } | |
3415 } | |
3416 return m; | |
3417 } | |
3418 | |
3419 | |
3420 // Construct a PreviousVersionNode entry for the array hung off | |
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3421 // the InstanceKlass. |
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3422 PreviousVersionNode::PreviousVersionNode(ConstantPool* prev_constant_pool, |
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3423 bool prev_cp_is_weak, GrowableArray<Method*>* prev_EMCP_methods) { |
0 | 3424 |
3425 _prev_constant_pool = prev_constant_pool; | |
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3426 _prev_cp_is_weak = prev_cp_is_weak; |
0 | 3427 _prev_EMCP_methods = prev_EMCP_methods; |
3428 } | |
3429 | |
3430 | |
3431 // Destroy a PreviousVersionNode | |
3432 PreviousVersionNode::~PreviousVersionNode() { | |
3433 if (_prev_constant_pool != NULL) { | |
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3434 _prev_constant_pool = NULL; |
0 | 3435 } |
3436 | |
3437 if (_prev_EMCP_methods != NULL) { | |
3438 delete _prev_EMCP_methods; | |
3439 } | |
3440 } | |
3441 | |
3442 | |
3443 // Construct a PreviousVersionInfo entry | |
3444 PreviousVersionInfo::PreviousVersionInfo(PreviousVersionNode *pv_node) { | |
3445 _prev_constant_pool_handle = constantPoolHandle(); // NULL handle | |
3446 _prev_EMCP_method_handles = NULL; | |
3447 | |
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3448 ConstantPool* cp = pv_node->prev_constant_pool(); |
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3449 assert(cp != NULL, "constant pool ref was unexpectedly cleared"); |
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3450 if (cp == NULL) { |
0 | 3451 return; // robustness |
3452 } | |
3453 | |
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3454 // make the ConstantPool* safe to return |
0 | 3455 _prev_constant_pool_handle = constantPoolHandle(cp); |
3456 | |
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3457 GrowableArray<Method*>* method_refs = pv_node->prev_EMCP_methods(); |
0 | 3458 if (method_refs == NULL) { |
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3459 // the InstanceKlass did not have any EMCP methods |
0 | 3460 return; |
3461 } | |
3462 | |
3463 _prev_EMCP_method_handles = new GrowableArray<methodHandle>(10); | |
3464 | |
3465 int n_methods = method_refs->length(); | |
3466 for (int i = 0; i < n_methods; i++) { | |
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3467 Method* method = method_refs->at(i); |
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3468 assert (method != NULL, "method has been cleared"); |
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3469 if (method == NULL) { |
0 | 3470 continue; // robustness |
3471 } | |
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3472 // make the Method* safe to return |
0 | 3473 _prev_EMCP_method_handles->append(methodHandle(method)); |
3474 } | |
3475 } | |
3476 | |
3477 | |
3478 // Destroy a PreviousVersionInfo | |
3479 PreviousVersionInfo::~PreviousVersionInfo() { | |
3480 // Since _prev_EMCP_method_handles is not C-heap allocated, we | |
3481 // don't have to delete it. | |
3482 } | |
3483 | |
3484 | |
3485 // Construct a helper for walking the previous versions array | |
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3486 PreviousVersionWalker::PreviousVersionWalker(InstanceKlass *ik) { |
0 | 3487 _previous_versions = ik->previous_versions(); |
3488 _current_index = 0; | |
3489 // _hm needs no initialization | |
3490 _current_p = NULL; | |
3491 } | |
3492 | |
3493 | |
3494 // Destroy a PreviousVersionWalker | |
3495 PreviousVersionWalker::~PreviousVersionWalker() { | |
3496 // Delete the current info just in case the caller didn't walk to | |
3497 // the end of the previous versions list. No harm if _current_p is | |
3498 // already NULL. | |
3499 delete _current_p; | |
3500 | |
3501 // When _hm is destroyed, all the Handles returned in | |
3502 // PreviousVersionInfo objects will be destroyed. | |
3503 // Also, after this destructor is finished it will be | |
3504 // safe to delete the GrowableArray allocated in the | |
3505 // PreviousVersionInfo objects. | |
3506 } | |
3507 | |
3508 | |
3509 // Return the interesting information for the next previous version | |
3510 // of the klass. Returns NULL if there are no more previous versions. | |
3511 PreviousVersionInfo* PreviousVersionWalker::next_previous_version() { | |
3512 if (_previous_versions == NULL) { | |
3513 // no previous versions so nothing to return | |
3514 return NULL; | |
3515 } | |
3516 | |
3517 delete _current_p; // cleanup the previous info for the caller | |
3518 _current_p = NULL; // reset to NULL so we don't delete same object twice | |
3519 | |
3520 int length = _previous_versions->length(); | |
3521 | |
3522 while (_current_index < length) { | |
3523 PreviousVersionNode * pv_node = _previous_versions->at(_current_index++); | |
6197 | 3524 PreviousVersionInfo * pv_info = new (ResourceObj::C_HEAP, mtClass) |
0 | 3525 PreviousVersionInfo(pv_node); |
3526 | |
3527 constantPoolHandle cp_h = pv_info->prev_constant_pool_handle(); | |
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3528 assert (!cp_h.is_null(), "null cp found in previous version"); |
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3529 |
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3530 // The caller will need to delete pv_info when they are done with it. |
0 | 3531 _current_p = pv_info; |
3532 return pv_info; | |
3533 } | |
3534 | |
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3535 // all of the underlying nodes' info has been deleted |
0 | 3536 return NULL; |
3537 } // end next_previous_version() |