Mercurial > hg > graal-jvmci-8
annotate src/share/vm/oops/instanceKlass.cpp @ 8714:35ef86296a5d
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author | dcubed |
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date | Fri, 08 Mar 2013 17:49:52 -0800 |
parents | 3efdfd6ddbf2 872b3feace55 |
children | c8b31b461e1a |
rev | line source |
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0 | 1 /* |
7956 | 2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "classfile/javaClasses.hpp" | |
27 #include "classfile/systemDictionary.hpp" | |
28 #include "classfile/verifier.hpp" | |
29 #include "classfile/vmSymbols.hpp" | |
30 #include "compiler/compileBroker.hpp" | |
31 #include "gc_implementation/shared/markSweep.inline.hpp" | |
32 #include "gc_interface/collectedHeap.inline.hpp" | |
33 #include "interpreter/oopMapCache.hpp" | |
34 #include "interpreter/rewriter.hpp" | |
35 #include "jvmtifiles/jvmti.h" | |
36 #include "memory/genOopClosures.inline.hpp" | |
7956 | 37 #include "memory/heapInspection.hpp" |
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38 #include "memory/metadataFactory.hpp" |
1972 | 39 #include "memory/oopFactory.hpp" |
3938 | 40 #include "oops/fieldStreams.hpp" |
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41 #include "oops/instanceClassLoaderKlass.hpp" |
1972 | 42 #include "oops/instanceKlass.hpp" |
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43 #include "oops/instanceMirrorKlass.hpp" |
1972 | 44 #include "oops/instanceOop.hpp" |
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45 #include "oops/klass.inline.hpp" |
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46 #include "oops/method.hpp" |
1972 | 47 #include "oops/oop.inline.hpp" |
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48 #include "oops/symbol.hpp" |
1972 | 49 #include "prims/jvmtiExport.hpp" |
50 #include "prims/jvmtiRedefineClassesTrace.hpp" | |
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51 #include "prims/methodComparator.hpp" |
1972 | 52 #include "runtime/fieldDescriptor.hpp" |
53 #include "runtime/handles.inline.hpp" | |
54 #include "runtime/javaCalls.hpp" | |
55 #include "runtime/mutexLocker.hpp" | |
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56 #include "runtime/thread.inline.hpp" |
1972 | 57 #include "services/threadService.hpp" |
58 #include "utilities/dtrace.hpp" | |
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59 #include "utilities/macros.hpp" |
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60 #if INCLUDE_ALL_GCS |
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61 #include "gc_implementation/concurrentMarkSweep/cmsOopClosures.inline.hpp" |
1972 | 62 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" |
63 #include "gc_implementation/g1/g1OopClosures.inline.hpp" | |
64 #include "gc_implementation/g1/g1RemSet.inline.hpp" | |
65 #include "gc_implementation/g1/heapRegionSeq.inline.hpp" | |
66 #include "gc_implementation/parNew/parOopClosures.inline.hpp" | |
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67 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.inline.hpp" |
1972 | 68 #include "gc_implementation/parallelScavenge/psPromotionManager.inline.hpp" |
69 #include "gc_implementation/parallelScavenge/psScavenge.inline.hpp" | |
70 #include "oops/oop.pcgc.inline.hpp" | |
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71 #endif // INCLUDE_ALL_GCS |
1972 | 72 #ifdef COMPILER1 |
73 #include "c1/c1_Compiler.hpp" | |
74 #endif | |
0 | 75 |
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76 #ifdef DTRACE_ENABLED |
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77 |
4006 | 78 #ifndef USDT2 |
79 | |
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80 HS_DTRACE_PROBE_DECL4(hotspot, class__initialization__required, |
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81 char*, intptr_t, oop, intptr_t); |
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82 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__recursive, |
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83 char*, intptr_t, oop, intptr_t, int); |
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84 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__concurrent, |
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85 char*, intptr_t, oop, intptr_t, int); |
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86 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__erroneous, |
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87 char*, intptr_t, oop, intptr_t, int); |
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88 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__super__failed, |
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89 char*, intptr_t, oop, intptr_t, int); |
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90 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__clinit, |
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91 char*, intptr_t, oop, intptr_t, int); |
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92 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__error, |
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93 char*, intptr_t, oop, intptr_t, int); |
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94 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__end, |
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95 char*, intptr_t, oop, intptr_t, int); |
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96 |
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97 #define DTRACE_CLASSINIT_PROBE(type, clss, thread_type) \ |
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98 { \ |
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99 char* data = NULL; \ |
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100 int len = 0; \ |
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101 Symbol* name = (clss)->name(); \ |
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102 if (name != NULL) { \ |
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103 data = (char*)name->bytes(); \ |
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104 len = name->utf8_length(); \ |
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105 } \ |
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106 HS_DTRACE_PROBE4(hotspot, class__initialization__##type, \ |
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107 data, len, (clss)->class_loader(), thread_type); \ |
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108 } |
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109 |
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110 #define DTRACE_CLASSINIT_PROBE_WAIT(type, clss, thread_type, wait) \ |
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111 { \ |
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112 char* data = NULL; \ |
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113 int len = 0; \ |
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114 Symbol* name = (clss)->name(); \ |
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115 if (name != NULL) { \ |
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116 data = (char*)name->bytes(); \ |
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117 len = name->utf8_length(); \ |
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118 } \ |
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119 HS_DTRACE_PROBE5(hotspot, class__initialization__##type, \ |
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120 data, len, (clss)->class_loader(), thread_type, wait); \ |
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121 } |
4006 | 122 #else /* USDT2 */ |
123 | |
124 #define HOTSPOT_CLASS_INITIALIZATION_required HOTSPOT_CLASS_INITIALIZATION_REQUIRED | |
125 #define HOTSPOT_CLASS_INITIALIZATION_recursive HOTSPOT_CLASS_INITIALIZATION_RECURSIVE | |
126 #define HOTSPOT_CLASS_INITIALIZATION_concurrent HOTSPOT_CLASS_INITIALIZATION_CONCURRENT | |
127 #define HOTSPOT_CLASS_INITIALIZATION_erroneous HOTSPOT_CLASS_INITIALIZATION_ERRONEOUS | |
128 #define HOTSPOT_CLASS_INITIALIZATION_super__failed HOTSPOT_CLASS_INITIALIZATION_SUPER_FAILED | |
129 #define HOTSPOT_CLASS_INITIALIZATION_clinit HOTSPOT_CLASS_INITIALIZATION_CLINIT | |
130 #define HOTSPOT_CLASS_INITIALIZATION_error HOTSPOT_CLASS_INITIALIZATION_ERROR | |
131 #define HOTSPOT_CLASS_INITIALIZATION_end HOTSPOT_CLASS_INITIALIZATION_END | |
132 #define DTRACE_CLASSINIT_PROBE(type, clss, thread_type) \ | |
133 { \ | |
134 char* data = NULL; \ | |
135 int len = 0; \ | |
136 Symbol* name = (clss)->name(); \ | |
137 if (name != NULL) { \ | |
138 data = (char*)name->bytes(); \ | |
139 len = name->utf8_length(); \ | |
140 } \ | |
141 HOTSPOT_CLASS_INITIALIZATION_##type( \ | |
142 data, len, (clss)->class_loader(), thread_type); \ | |
143 } | |
144 | |
145 #define DTRACE_CLASSINIT_PROBE_WAIT(type, clss, thread_type, wait) \ | |
146 { \ | |
147 char* data = NULL; \ | |
148 int len = 0; \ | |
149 Symbol* name = (clss)->name(); \ | |
150 if (name != NULL) { \ | |
151 data = (char*)name->bytes(); \ | |
152 len = name->utf8_length(); \ | |
153 } \ | |
154 HOTSPOT_CLASS_INITIALIZATION_##type( \ | |
155 data, len, (clss)->class_loader(), thread_type, wait); \ | |
156 } | |
157 #endif /* USDT2 */ | |
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158 |
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159 #else // ndef DTRACE_ENABLED |
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160 |
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161 #define DTRACE_CLASSINIT_PROBE(type, clss, thread_type) |
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162 #define DTRACE_CLASSINIT_PROBE_WAIT(type, clss, thread_type, wait) |
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163 |
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164 #endif // ndef DTRACE_ENABLED |
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165 |
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166 volatile int InstanceKlass::_total_instanceKlass_count = 0; |
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167 |
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168 Klass* InstanceKlass::allocate_instance_klass(ClassLoaderData* loader_data, |
8031 | 169 int vtable_len, |
170 int itable_len, | |
171 int static_field_size, | |
172 int nonstatic_oop_map_size, | |
173 ReferenceType rt, | |
174 AccessFlags access_flags, | |
175 Symbol* name, | |
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176 Klass* super_klass, |
8031 | 177 bool is_anonymous, |
178 TRAPS) { | |
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179 |
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180 int size = InstanceKlass::size(vtable_len, itable_len, nonstatic_oop_map_size, |
8031 | 181 access_flags.is_interface(), is_anonymous); |
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182 |
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183 // Allocation |
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184 InstanceKlass* ik; |
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185 if (rt == REF_NONE) { |
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186 if (name == vmSymbols::java_lang_Class()) { |
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187 ik = new (loader_data, size, THREAD) InstanceMirrorKlass( |
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188 vtable_len, itable_len, static_field_size, nonstatic_oop_map_size, rt, |
8031 | 189 access_flags, is_anonymous); |
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190 } else if (name == vmSymbols::java_lang_ClassLoader() || |
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191 (SystemDictionary::ClassLoader_klass_loaded() && |
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192 super_klass != NULL && |
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193 super_klass->is_subtype_of(SystemDictionary::ClassLoader_klass()))) { |
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194 ik = new (loader_data, size, THREAD) InstanceClassLoaderKlass( |
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195 vtable_len, itable_len, static_field_size, nonstatic_oop_map_size, rt, |
8031 | 196 access_flags, is_anonymous); |
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197 } else { |
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198 // normal class |
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199 ik = new (loader_data, size, THREAD) InstanceKlass( |
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200 vtable_len, itable_len, static_field_size, nonstatic_oop_map_size, rt, |
8031 | 201 access_flags, is_anonymous); |
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202 } |
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203 } else { |
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204 // reference klass |
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205 ik = new (loader_data, size, THREAD) InstanceRefKlass( |
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206 vtable_len, itable_len, static_field_size, nonstatic_oop_map_size, rt, |
8031 | 207 access_flags, is_anonymous); |
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208 } |
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209 |
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210 Atomic::inc(&_total_instanceKlass_count); |
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211 return ik; |
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212 } |
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213 |
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214 InstanceKlass::InstanceKlass(int vtable_len, |
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215 int itable_len, |
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216 int static_field_size, |
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217 int nonstatic_oop_map_size, |
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218 ReferenceType rt, |
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219 AccessFlags access_flags, |
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220 bool is_anonymous) { |
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221 No_Safepoint_Verifier no_safepoint; // until k becomes parsable |
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222 |
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223 int iksize = InstanceKlass::size(vtable_len, itable_len, nonstatic_oop_map_size, |
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224 access_flags.is_interface(), is_anonymous); |
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225 |
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226 // The sizes of these these three variables are used for determining the |
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227 // size of the instanceKlassOop. It is critical that these are set to the right |
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228 // sizes before the first GC, i.e., when we allocate the mirror. |
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229 set_vtable_length(vtable_len); |
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230 set_itable_length(itable_len); |
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231 set_static_field_size(static_field_size); |
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232 set_nonstatic_oop_map_size(nonstatic_oop_map_size); |
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233 set_access_flags(access_flags); |
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234 _misc_flags = 0; // initialize to zero |
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235 set_is_anonymous(is_anonymous); |
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236 assert(size() == iksize, "wrong size for object"); |
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237 |
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238 set_array_klasses(NULL); |
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239 set_methods(NULL); |
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240 set_method_ordering(NULL); |
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241 set_local_interfaces(NULL); |
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242 set_transitive_interfaces(NULL); |
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243 init_implementor(); |
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244 set_fields(NULL, 0); |
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245 set_constants(NULL); |
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246 set_class_loader_data(NULL); |
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247 set_protection_domain(NULL); |
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248 set_signers(NULL); |
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249 set_source_file_name(NULL); |
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250 set_source_debug_extension(NULL, 0); |
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251 set_array_name(NULL); |
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252 set_inner_classes(NULL); |
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253 set_static_oop_field_count(0); |
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254 set_nonstatic_field_size(0); |
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255 set_is_marked_dependent(false); |
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256 set_init_state(InstanceKlass::allocated); |
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257 set_init_thread(NULL); |
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258 set_init_lock(NULL); |
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259 set_reference_type(rt); |
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260 set_oop_map_cache(NULL); |
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261 set_jni_ids(NULL); |
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262 set_osr_nmethods_head(NULL); |
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263 set_breakpoints(NULL); |
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264 init_previous_versions(); |
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265 set_generic_signature(NULL); |
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266 release_set_methods_jmethod_ids(NULL); |
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267 release_set_methods_cached_itable_indices(NULL); |
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268 set_annotations(NULL); |
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269 set_jvmti_cached_class_field_map(NULL); |
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270 set_initial_method_idnum(0); |
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271 _dependencies = NULL; |
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272 set_jvmti_cached_class_field_map(NULL); |
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273 set_cached_class_file(NULL, 0); |
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274 set_initial_method_idnum(0); |
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275 set_minor_version(0); |
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276 set_major_version(0); |
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277 NOT_PRODUCT(_verify_count = 0;) |
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278 |
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279 // initialize the non-header words to zero |
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280 intptr_t* p = (intptr_t*)this; |
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281 for (int index = InstanceKlass::header_size(); index < iksize; index++) { |
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282 p[index] = NULL_WORD; |
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283 } |
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284 |
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285 // Set temporary value until parseClassFile updates it with the real instance |
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286 // size. |
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287 set_layout_helper(Klass::instance_layout_helper(0, true)); |
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288 } |
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289 |
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290 |
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291 // This function deallocates the metadata and C heap pointers that the |
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292 // InstanceKlass points to. |
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293 void InstanceKlass::deallocate_contents(ClassLoaderData* loader_data) { |
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294 |
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295 // Orphan the mirror first, CMS thinks it's still live. |
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296 java_lang_Class::set_klass(java_mirror(), NULL); |
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297 |
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298 // Need to take this class off the class loader data list. |
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299 loader_data->remove_class(this); |
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300 |
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301 // The array_klass for this class is created later, after error handling. |
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302 // For class redefinition, we keep the original class so this scratch class |
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303 // doesn't have an array class. Either way, assert that there is nothing |
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304 // to deallocate. |
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305 assert(array_klasses() == NULL, "array classes shouldn't be created for this class yet"); |
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306 |
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307 // Release C heap allocated data that this might point to, which includes |
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308 // reference counting symbol names. |
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309 release_C_heap_structures(); |
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310 |
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311 Array<Method*>* ms = methods(); |
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312 if (ms != Universe::the_empty_method_array()) { |
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313 for (int i = 0; i <= methods()->length() -1 ; i++) { |
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314 Method* method = methods()->at(i); |
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315 // Only want to delete methods that are not executing for RedefineClasses. |
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316 // The previous version will point to them so they're not totally dangling |
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317 assert (!method->on_stack(), "shouldn't be called with methods on stack"); |
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318 MetadataFactory::free_metadata(loader_data, method); |
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319 } |
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320 MetadataFactory::free_array<Method*>(loader_data, methods()); |
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321 } |
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322 set_methods(NULL); |
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323 |
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324 if (method_ordering() != Universe::the_empty_int_array()) { |
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325 MetadataFactory::free_array<int>(loader_data, method_ordering()); |
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326 } |
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327 set_method_ordering(NULL); |
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328 |
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329 // This array is in Klass, but remove it with the InstanceKlass since |
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330 // this place would be the only caller and it can share memory with transitive |
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331 // interfaces. |
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332 if (secondary_supers() != Universe::the_empty_klass_array() && |
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333 secondary_supers() != transitive_interfaces()) { |
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334 MetadataFactory::free_array<Klass*>(loader_data, secondary_supers()); |
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335 } |
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336 set_secondary_supers(NULL); |
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337 |
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338 // Only deallocate transitive interfaces if not empty, same as super class |
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339 // or same as local interfaces. See code in parseClassFile. |
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340 Array<Klass*>* ti = transitive_interfaces(); |
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341 if (ti != Universe::the_empty_klass_array() && ti != local_interfaces()) { |
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342 // check that the interfaces don't come from super class |
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343 Array<Klass*>* sti = (super() == NULL) ? NULL : |
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344 InstanceKlass::cast(super())->transitive_interfaces(); |
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345 if (ti != sti) { |
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346 MetadataFactory::free_array<Klass*>(loader_data, ti); |
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347 } |
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348 } |
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349 set_transitive_interfaces(NULL); |
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350 |
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351 // local interfaces can be empty |
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352 Array<Klass*>* li = local_interfaces(); |
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353 if (li != Universe::the_empty_klass_array()) { |
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354 MetadataFactory::free_array<Klass*>(loader_data, li); |
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355 } |
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356 set_local_interfaces(NULL); |
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357 |
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358 MetadataFactory::free_array<jushort>(loader_data, fields()); |
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359 set_fields(NULL, 0); |
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360 |
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361 // If a method from a redefined class is using this constant pool, don't |
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362 // delete it, yet. The new class's previous version will point to this. |
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363 assert (!constants()->on_stack(), "shouldn't be called if anything is onstack"); |
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364 MetadataFactory::free_metadata(loader_data, constants()); |
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365 set_constants(NULL); |
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366 |
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367 if (inner_classes() != Universe::the_empty_short_array()) { |
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368 MetadataFactory::free_array<jushort>(loader_data, inner_classes()); |
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369 } |
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370 set_inner_classes(NULL); |
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371 |
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372 // Null out Java heap objects, although these won't be walked to keep |
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373 // alive once this InstanceKlass is deallocated. |
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374 set_protection_domain(NULL); |
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375 set_signers(NULL); |
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376 set_init_lock(NULL); |
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377 |
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378 // We should deallocate the Annotations instance |
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379 MetadataFactory::free_metadata(loader_data, annotations()); |
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380 set_annotations(NULL); |
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381 } |
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382 |
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383 volatile oop InstanceKlass::init_lock() const { |
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384 volatile oop lock = _init_lock; // read once |
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385 assert((oop)lock != NULL || !is_not_initialized(), // initialized or in_error state |
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386 "only fully initialized state can have a null lock"); |
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387 return lock; |
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388 } |
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389 |
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390 // Set the initialization lock to null so the object can be GC'ed. Any racing |
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391 // threads to get this lock will see a null lock and will not lock. |
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392 // That's okay because they all check for initialized state after getting |
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393 // the lock and return. |
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394 void InstanceKlass::fence_and_clear_init_lock() { |
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395 // make sure previous stores are all done, notably the init_state. |
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396 OrderAccess::storestore(); |
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397 klass_oop_store(&_init_lock, NULL); |
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398 assert(!is_not_initialized(), "class must be initialized now"); |
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399 } |
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400 |
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401 |
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402 bool InstanceKlass::should_be_initialized() const { |
0 | 403 return !is_initialized(); |
404 } | |
405 | |
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406 klassVtable* InstanceKlass::vtable() const { |
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407 return new klassVtable(this, start_of_vtable(), vtable_length() / vtableEntry::size()); |
0 | 408 } |
409 | |
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410 klassItable* InstanceKlass::itable() const { |
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411 return new klassItable(instanceKlassHandle(this)); |
0 | 412 } |
413 | |
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414 void InstanceKlass::eager_initialize(Thread *thread) { |
0 | 415 if (!EagerInitialization) return; |
416 | |
417 if (this->is_not_initialized()) { | |
418 // abort if the the class has a class initializer | |
419 if (this->class_initializer() != NULL) return; | |
420 | |
421 // abort if it is java.lang.Object (initialization is handled in genesis) | |
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422 Klass* super = this->super(); |
0 | 423 if (super == NULL) return; |
424 | |
425 // abort if the super class should be initialized | |
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426 if (!InstanceKlass::cast(super)->is_initialized()) return; |
0 | 427 |
428 // call body to expose the this pointer | |
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429 instanceKlassHandle this_oop(thread, this); |
0 | 430 eager_initialize_impl(this_oop); |
431 } | |
432 } | |
433 | |
434 | |
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435 void InstanceKlass::eager_initialize_impl(instanceKlassHandle this_oop) { |
0 | 436 EXCEPTION_MARK; |
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437 volatile oop init_lock = this_oop->init_lock(); |
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438 ObjectLocker ol(init_lock, THREAD, init_lock != NULL); |
0 | 439 |
440 // abort if someone beat us to the initialization | |
441 if (!this_oop->is_not_initialized()) return; // note: not equivalent to is_initialized() | |
442 | |
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443 ClassState old_state = this_oop->init_state(); |
0 | 444 link_class_impl(this_oop, true, THREAD); |
445 if (HAS_PENDING_EXCEPTION) { | |
446 CLEAR_PENDING_EXCEPTION; | |
447 // Abort if linking the class throws an exception. | |
448 | |
449 // Use a test to avoid redundantly resetting the state if there's | |
450 // no change. Set_init_state() asserts that state changes make | |
451 // progress, whereas here we might just be spinning in place. | |
452 if( old_state != this_oop->_init_state ) | |
453 this_oop->set_init_state (old_state); | |
454 } else { | |
455 // linking successfull, mark class as initialized | |
456 this_oop->set_init_state (fully_initialized); | |
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457 this_oop->fence_and_clear_init_lock(); |
0 | 458 // trace |
459 if (TraceClassInitialization) { | |
460 ResourceMark rm(THREAD); | |
461 tty->print_cr("[Initialized %s without side effects]", this_oop->external_name()); | |
462 } | |
463 } | |
464 } | |
465 | |
466 | |
467 // See "The Virtual Machine Specification" section 2.16.5 for a detailed explanation of the class initialization | |
468 // process. The step comments refers to the procedure described in that section. | |
469 // Note: implementation moved to static method to expose the this pointer. | |
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470 void InstanceKlass::initialize(TRAPS) { |
0 | 471 if (this->should_be_initialized()) { |
472 HandleMark hm(THREAD); | |
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473 instanceKlassHandle this_oop(THREAD, this); |
0 | 474 initialize_impl(this_oop, CHECK); |
475 // Note: at this point the class may be initialized | |
476 // OR it may be in the state of being initialized | |
477 // in case of recursive initialization! | |
478 } else { | |
479 assert(is_initialized(), "sanity check"); | |
480 } | |
481 } | |
482 | |
483 | |
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484 bool InstanceKlass::verify_code( |
0 | 485 instanceKlassHandle this_oop, bool throw_verifyerror, TRAPS) { |
486 // 1) Verify the bytecodes | |
487 Verifier::Mode mode = | |
488 throw_verifyerror ? Verifier::ThrowException : Verifier::NoException; | |
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489 return Verifier::verify(this_oop, mode, this_oop->should_verify_class(), CHECK_false); |
0 | 490 } |
491 | |
492 | |
493 // Used exclusively by the shared spaces dump mechanism to prevent | |
494 // classes mapped into the shared regions in new VMs from appearing linked. | |
495 | |
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496 void InstanceKlass::unlink_class() { |
0 | 497 assert(is_linked(), "must be linked"); |
498 _init_state = loaded; | |
499 } | |
500 | |
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501 void InstanceKlass::link_class(TRAPS) { |
0 | 502 assert(is_loaded(), "must be loaded"); |
503 if (!is_linked()) { | |
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504 HandleMark hm(THREAD); |
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505 instanceKlassHandle this_oop(THREAD, this); |
0 | 506 link_class_impl(this_oop, true, CHECK); |
507 } | |
508 } | |
509 | |
510 // Called to verify that a class can link during initialization, without | |
511 // throwing a VerifyError. | |
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512 bool InstanceKlass::link_class_or_fail(TRAPS) { |
0 | 513 assert(is_loaded(), "must be loaded"); |
514 if (!is_linked()) { | |
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515 HandleMark hm(THREAD); |
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516 instanceKlassHandle this_oop(THREAD, this); |
0 | 517 link_class_impl(this_oop, false, CHECK_false); |
518 } | |
519 return is_linked(); | |
520 } | |
521 | |
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522 bool InstanceKlass::link_class_impl( |
0 | 523 instanceKlassHandle this_oop, bool throw_verifyerror, TRAPS) { |
524 // check for error state | |
525 if (this_oop->is_in_error_state()) { | |
526 ResourceMark rm(THREAD); | |
527 THROW_MSG_(vmSymbols::java_lang_NoClassDefFoundError(), | |
528 this_oop->external_name(), false); | |
529 } | |
530 // return if already verified | |
531 if (this_oop->is_linked()) { | |
532 return true; | |
533 } | |
534 | |
535 // Timing | |
536 // timer handles recursion | |
537 assert(THREAD->is_Java_thread(), "non-JavaThread in link_class_impl"); | |
538 JavaThread* jt = (JavaThread*)THREAD; | |
539 | |
540 // link super class before linking this class | |
541 instanceKlassHandle super(THREAD, this_oop->super()); | |
542 if (super.not_null()) { | |
543 if (super->is_interface()) { // check if super class is an interface | |
544 ResourceMark rm(THREAD); | |
545 Exceptions::fthrow( | |
546 THREAD_AND_LOCATION, | |
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547 vmSymbols::java_lang_IncompatibleClassChangeError(), |
0 | 548 "class %s has interface %s as super class", |
549 this_oop->external_name(), | |
550 super->external_name() | |
551 ); | |
552 return false; | |
553 } | |
554 | |
555 link_class_impl(super, throw_verifyerror, CHECK_false); | |
556 } | |
557 | |
558 // link all interfaces implemented by this class before linking this class | |
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559 Array<Klass*>* interfaces = this_oop->local_interfaces(); |
0 | 560 int num_interfaces = interfaces->length(); |
561 for (int index = 0; index < num_interfaces; index++) { | |
562 HandleMark hm(THREAD); | |
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563 instanceKlassHandle ih(THREAD, interfaces->at(index)); |
0 | 564 link_class_impl(ih, throw_verifyerror, CHECK_false); |
565 } | |
566 | |
567 // in case the class is linked in the process of linking its superclasses | |
568 if (this_oop->is_linked()) { | |
569 return true; | |
570 } | |
571 | |
875
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572 // trace only the link time for this klass that includes |
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573 // the verification time |
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574 PerfClassTraceTime vmtimer(ClassLoader::perf_class_link_time(), |
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575 ClassLoader::perf_class_link_selftime(), |
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576 ClassLoader::perf_classes_linked(), |
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577 jt->get_thread_stat()->perf_recursion_counts_addr(), |
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578 jt->get_thread_stat()->perf_timers_addr(), |
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579 PerfClassTraceTime::CLASS_LINK); |
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580 |
0 | 581 // verification & rewriting |
582 { | |
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583 volatile oop init_lock = this_oop->init_lock(); |
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584 ObjectLocker ol(init_lock, THREAD, init_lock != NULL); |
0 | 585 // rewritten will have been set if loader constraint error found |
586 // on an earlier link attempt | |
587 // don't verify or rewrite if already rewritten | |
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588 |
0 | 589 if (!this_oop->is_linked()) { |
590 if (!this_oop->is_rewritten()) { | |
591 { | |
592 // Timer includes any side effects of class verification (resolution, | |
593 // etc), but not recursive entry into verify_code(). | |
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594 PerfClassTraceTime timer(ClassLoader::perf_class_verify_time(), |
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595 ClassLoader::perf_class_verify_selftime(), |
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596 ClassLoader::perf_classes_verified(), |
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597 jt->get_thread_stat()->perf_recursion_counts_addr(), |
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598 jt->get_thread_stat()->perf_timers_addr(), |
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599 PerfClassTraceTime::CLASS_VERIFY); |
0 | 600 bool verify_ok = verify_code(this_oop, throw_verifyerror, THREAD); |
601 if (!verify_ok) { | |
602 return false; | |
603 } | |
604 } | |
605 | |
606 // Just in case a side-effect of verify linked this class already | |
607 // (which can sometimes happen since the verifier loads classes | |
608 // using custom class loaders, which are free to initialize things) | |
609 if (this_oop->is_linked()) { | |
610 return true; | |
611 } | |
612 | |
613 // also sets rewritten | |
614 this_oop->rewrite_class(CHECK_false); | |
615 } | |
616 | |
3748 | 617 // relocate jsrs and link methods after they are all rewritten |
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618 this_oop->link_methods(CHECK_false); |
3748 | 619 |
0 | 620 // Initialize the vtable and interface table after |
621 // methods have been rewritten since rewrite may | |
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622 // fabricate new Method*s. |
0 | 623 // also does loader constraint checking |
624 if (!this_oop()->is_shared()) { | |
625 ResourceMark rm(THREAD); | |
626 this_oop->vtable()->initialize_vtable(true, CHECK_false); | |
627 this_oop->itable()->initialize_itable(true, CHECK_false); | |
628 } | |
629 #ifdef ASSERT | |
630 else { | |
631 ResourceMark rm(THREAD); | |
632 this_oop->vtable()->verify(tty, true); | |
633 // In case itable verification is ever added. | |
634 // this_oop->itable()->verify(tty, true); | |
635 } | |
636 #endif | |
637 this_oop->set_init_state(linked); | |
638 if (JvmtiExport::should_post_class_prepare()) { | |
639 Thread *thread = THREAD; | |
640 assert(thread->is_Java_thread(), "thread->is_Java_thread()"); | |
641 JvmtiExport::post_class_prepare((JavaThread *) thread, this_oop()); | |
642 } | |
643 } | |
644 } | |
645 return true; | |
646 } | |
647 | |
648 | |
649 // Rewrite the byte codes of all of the methods of a class. | |
650 // The rewriter must be called exactly once. Rewriting must happen after | |
651 // verification but before the first method of the class is executed. | |
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652 void InstanceKlass::rewrite_class(TRAPS) { |
0 | 653 assert(is_loaded(), "must be loaded"); |
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654 instanceKlassHandle this_oop(THREAD, this); |
0 | 655 if (this_oop->is_rewritten()) { |
656 assert(this_oop()->is_shared(), "rewriting an unshared class?"); | |
657 return; | |
658 } | |
3748 | 659 Rewriter::rewrite(this_oop, CHECK); |
0 | 660 this_oop->set_rewritten(); |
661 } | |
662 | |
3748 | 663 // Now relocate and link method entry points after class is rewritten. |
664 // This is outside is_rewritten flag. In case of an exception, it can be | |
665 // executed more than once. | |
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666 void InstanceKlass::link_methods(TRAPS) { |
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667 int len = methods()->length(); |
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668 for (int i = len-1; i >= 0; i--) { |
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669 methodHandle m(THREAD, methods()->at(i)); |
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670 |
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671 // Set up method entry points for compiler and interpreter . |
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672 m->link_method(m, CHECK); |
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673 |
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674 // This is for JVMTI and unrelated to relocator but the last thing we do |
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675 #ifdef ASSERT |
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676 if (StressMethodComparator) { |
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677 ResourceMark rm(THREAD); |
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678 static int nmc = 0; |
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679 for (int j = i; j >= 0 && j >= i-4; j--) { |
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680 if ((++nmc % 1000) == 0) tty->print_cr("Have run MethodComparator %d times...", nmc); |
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681 bool z = MethodComparator::methods_EMCP(m(), |
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682 methods()->at(j)); |
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683 if (j == i && !z) { |
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684 tty->print("MethodComparator FAIL: "); m->print(); m->print_codes(); |
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685 assert(z, "method must compare equal to itself"); |
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686 } |
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687 } |
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688 } |
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689 #endif //ASSERT |
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690 } |
3748 | 691 } |
692 | |
0 | 693 |
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694 void InstanceKlass::initialize_impl(instanceKlassHandle this_oop, TRAPS) { |
0 | 695 // Make sure klass is linked (verified) before initialization |
696 // A class could already be verified, since it has been reflected upon. | |
697 this_oop->link_class(CHECK); | |
698 | |
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699 DTRACE_CLASSINIT_PROBE(required, InstanceKlass::cast(this_oop()), -1); |
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700 |
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701 bool wait = false; |
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702 |
0 | 703 // refer to the JVM book page 47 for description of steps |
704 // Step 1 | |
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705 { |
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706 volatile oop init_lock = this_oop->init_lock(); |
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707 ObjectLocker ol(init_lock, THREAD, init_lock != NULL); |
0 | 708 |
709 Thread *self = THREAD; // it's passed the current thread | |
710 | |
711 // Step 2 | |
712 // If we were to use wait() instead of waitInterruptibly() then | |
713 // we might end up throwing IE from link/symbol resolution sites | |
714 // that aren't expected to throw. This would wreak havoc. See 6320309. | |
715 while(this_oop->is_being_initialized() && !this_oop->is_reentrant_initialization(self)) { | |
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716 wait = true; |
0 | 717 ol.waitUninterruptibly(CHECK); |
718 } | |
719 | |
720 // Step 3 | |
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721 if (this_oop->is_being_initialized() && this_oop->is_reentrant_initialization(self)) { |
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722 DTRACE_CLASSINIT_PROBE_WAIT(recursive, InstanceKlass::cast(this_oop()), -1,wait); |
0 | 723 return; |
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724 } |
0 | 725 |
726 // Step 4 | |
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727 if (this_oop->is_initialized()) { |
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728 DTRACE_CLASSINIT_PROBE_WAIT(concurrent, InstanceKlass::cast(this_oop()), -1,wait); |
0 | 729 return; |
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730 } |
0 | 731 |
732 // Step 5 | |
733 if (this_oop->is_in_error_state()) { | |
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734 DTRACE_CLASSINIT_PROBE_WAIT(erroneous, InstanceKlass::cast(this_oop()), -1,wait); |
0 | 735 ResourceMark rm(THREAD); |
736 const char* desc = "Could not initialize class "; | |
737 const char* className = this_oop->external_name(); | |
738 size_t msglen = strlen(desc) + strlen(className) + 1; | |
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739 char* message = NEW_RESOURCE_ARRAY(char, msglen); |
0 | 740 if (NULL == message) { |
741 // Out of memory: can't create detailed error message | |
742 THROW_MSG(vmSymbols::java_lang_NoClassDefFoundError(), className); | |
743 } else { | |
744 jio_snprintf(message, msglen, "%s%s", desc, className); | |
745 THROW_MSG(vmSymbols::java_lang_NoClassDefFoundError(), message); | |
746 } | |
747 } | |
748 | |
749 // Step 6 | |
750 this_oop->set_init_state(being_initialized); | |
751 this_oop->set_init_thread(self); | |
752 } | |
753 | |
754 // Step 7 | |
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755 Klass* super_klass = this_oop->super(); |
6983 | 756 if (super_klass != NULL && !this_oop->is_interface() && super_klass->should_be_initialized()) { |
757 super_klass->initialize(THREAD); | |
0 | 758 |
759 if (HAS_PENDING_EXCEPTION) { | |
760 Handle e(THREAD, PENDING_EXCEPTION); | |
761 CLEAR_PENDING_EXCEPTION; | |
762 { | |
763 EXCEPTION_MARK; | |
764 this_oop->set_initialization_state_and_notify(initialization_error, THREAD); // Locks object, set state, and notify all waiting threads | |
765 CLEAR_PENDING_EXCEPTION; // ignore any exception thrown, superclass initialization error is thrown below | |
766 } | |
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767 DTRACE_CLASSINIT_PROBE_WAIT(super__failed, InstanceKlass::cast(this_oop()), -1,wait); |
0 | 768 THROW_OOP(e()); |
769 } | |
770 } | |
771 | |
6934 | 772 if (this_oop->has_default_methods()) { |
773 // Step 7.5: initialize any interfaces which have default methods | |
774 for (int i = 0; i < this_oop->local_interfaces()->length(); ++i) { | |
775 Klass* iface = this_oop->local_interfaces()->at(i); | |
776 InstanceKlass* ik = InstanceKlass::cast(iface); | |
777 if (ik->has_default_methods() && ik->should_be_initialized()) { | |
778 ik->initialize(THREAD); | |
779 | |
780 if (HAS_PENDING_EXCEPTION) { | |
781 Handle e(THREAD, PENDING_EXCEPTION); | |
782 CLEAR_PENDING_EXCEPTION; | |
783 { | |
784 EXCEPTION_MARK; | |
785 // Locks object, set state, and notify all waiting threads | |
786 this_oop->set_initialization_state_and_notify( | |
787 initialization_error, THREAD); | |
788 | |
789 // ignore any exception thrown, superclass initialization error is | |
790 // thrown below | |
791 CLEAR_PENDING_EXCEPTION; | |
792 } | |
793 DTRACE_CLASSINIT_PROBE_WAIT( | |
794 super__failed, InstanceKlass::cast(this_oop()), -1, wait); | |
795 THROW_OOP(e()); | |
796 } | |
797 } | |
798 } | |
799 } | |
800 | |
0 | 801 // Step 8 |
802 { | |
803 assert(THREAD->is_Java_thread(), "non-JavaThread in initialize_impl"); | |
804 JavaThread* jt = (JavaThread*)THREAD; | |
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805 DTRACE_CLASSINIT_PROBE_WAIT(clinit, InstanceKlass::cast(this_oop()), -1,wait); |
0 | 806 // Timer includes any side effects of class initialization (resolution, |
807 // etc), but not recursive entry into call_class_initializer(). | |
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808 PerfClassTraceTime timer(ClassLoader::perf_class_init_time(), |
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809 ClassLoader::perf_class_init_selftime(), |
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810 ClassLoader::perf_classes_inited(), |
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811 jt->get_thread_stat()->perf_recursion_counts_addr(), |
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812 jt->get_thread_stat()->perf_timers_addr(), |
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813 PerfClassTraceTime::CLASS_CLINIT); |
0 | 814 this_oop->call_class_initializer(THREAD); |
815 } | |
816 | |
817 // Step 9 | |
818 if (!HAS_PENDING_EXCEPTION) { | |
819 this_oop->set_initialization_state_and_notify(fully_initialized, CHECK); | |
820 { ResourceMark rm(THREAD); | |
821 debug_only(this_oop->vtable()->verify(tty, true);) | |
822 } | |
823 } | |
824 else { | |
825 // Step 10 and 11 | |
826 Handle e(THREAD, PENDING_EXCEPTION); | |
827 CLEAR_PENDING_EXCEPTION; | |
828 { | |
829 EXCEPTION_MARK; | |
830 this_oop->set_initialization_state_and_notify(initialization_error, THREAD); | |
831 CLEAR_PENDING_EXCEPTION; // ignore any exception thrown, class initialization error is thrown below | |
832 } | |
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833 DTRACE_CLASSINIT_PROBE_WAIT(error, InstanceKlass::cast(this_oop()), -1,wait); |
1142 | 834 if (e->is_a(SystemDictionary::Error_klass())) { |
0 | 835 THROW_OOP(e()); |
836 } else { | |
837 JavaCallArguments args(e); | |
2177
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838 THROW_ARG(vmSymbols::java_lang_ExceptionInInitializerError(), |
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839 vmSymbols::throwable_void_signature(), |
0 | 840 &args); |
841 } | |
842 } | |
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843 DTRACE_CLASSINIT_PROBE_WAIT(end, InstanceKlass::cast(this_oop()), -1,wait); |
0 | 844 } |
845 | |
846 | |
847 // Note: implementation moved to static method to expose the this pointer. | |
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848 void InstanceKlass::set_initialization_state_and_notify(ClassState state, TRAPS) { |
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849 instanceKlassHandle kh(THREAD, this); |
0 | 850 set_initialization_state_and_notify_impl(kh, state, CHECK); |
851 } | |
852 | |
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853 void InstanceKlass::set_initialization_state_and_notify_impl(instanceKlassHandle this_oop, ClassState state, TRAPS) { |
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854 volatile oop init_lock = this_oop->init_lock(); |
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855 ObjectLocker ol(init_lock, THREAD, init_lock != NULL); |
0 | 856 this_oop->set_init_state(state); |
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857 this_oop->fence_and_clear_init_lock(); |
0 | 858 ol.notify_all(CHECK); |
859 } | |
860 | |
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861 // The embedded _implementor field can only record one implementor. |
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862 // When there are more than one implementors, the _implementor field |
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863 // is set to the interface Klass* itself. Following are the possible |
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864 // values for the _implementor field: |
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865 // NULL - no implementor |
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866 // implementor Klass* - one implementor |
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867 // self - more than one implementor |
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868 // |
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869 // The _implementor field only exists for interfaces. |
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870 void InstanceKlass::add_implementor(Klass* k) { |
0 | 871 assert(Compile_lock->owned_by_self(), ""); |
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872 assert(is_interface(), "not interface"); |
0 | 873 // Filter out my subinterfaces. |
874 // (Note: Interfaces are never on the subklass list.) | |
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875 if (InstanceKlass::cast(k)->is_interface()) return; |
0 | 876 |
877 // Filter out subclasses whose supers already implement me. | |
878 // (Note: CHA must walk subclasses of direct implementors | |
879 // in order to locate indirect implementors.) | |
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880 Klass* sk = InstanceKlass::cast(k)->super(); |
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881 if (sk != NULL && InstanceKlass::cast(sk)->implements_interface(this)) |
0 | 882 // We only need to check one immediate superclass, since the |
883 // implements_interface query looks at transitive_interfaces. | |
884 // Any supers of the super have the same (or fewer) transitive_interfaces. | |
885 return; | |
886 | |
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887 Klass* ik = implementor(); |
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888 if (ik == NULL) { |
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889 set_implementor(k); |
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890 } else if (ik != this) { |
5998
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891 // There is already an implementor. Use itself as an indicator of |
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892 // more than one implementors. |
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893 set_implementor(this); |
0 | 894 } |
895 | |
896 // The implementor also implements the transitive_interfaces | |
897 for (int index = 0; index < local_interfaces()->length(); index++) { | |
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898 InstanceKlass::cast(local_interfaces()->at(index))->add_implementor(k); |
0 | 899 } |
900 } | |
901 | |
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902 void InstanceKlass::init_implementor() { |
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903 if (is_interface()) { |
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904 set_implementor(NULL); |
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905 } |
0 | 906 } |
907 | |
908 | |
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909 void InstanceKlass::process_interfaces(Thread *thread) { |
0 | 910 // link this class into the implementors list of every interface it implements |
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911 Klass* this_as_klass_oop = this; |
0 | 912 for (int i = local_interfaces()->length() - 1; i >= 0; i--) { |
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913 assert(local_interfaces()->at(i)->is_klass(), "must be a klass"); |
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914 InstanceKlass* interf = InstanceKlass::cast(local_interfaces()->at(i)); |
0 | 915 assert(interf->is_interface(), "expected interface"); |
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916 interf->add_implementor(this_as_klass_oop); |
0 | 917 } |
918 } | |
919 | |
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920 bool InstanceKlass::can_be_primary_super_slow() const { |
0 | 921 if (is_interface()) |
922 return false; | |
923 else | |
924 return Klass::can_be_primary_super_slow(); | |
925 } | |
926 | |
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927 GrowableArray<Klass*>* InstanceKlass::compute_secondary_supers(int num_extra_slots) { |
0 | 928 // The secondaries are the implemented interfaces. |
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929 InstanceKlass* ik = InstanceKlass::cast(this); |
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930 Array<Klass*>* interfaces = ik->transitive_interfaces(); |
0 | 931 int num_secondaries = num_extra_slots + interfaces->length(); |
932 if (num_secondaries == 0) { | |
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933 // Must share this for correct bootstrapping! |
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934 set_secondary_supers(Universe::the_empty_klass_array()); |
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935 return NULL; |
0 | 936 } else if (num_extra_slots == 0) { |
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937 // The secondary super list is exactly the same as the transitive interfaces. |
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938 // Redefine classes has to be careful not to delete this! |
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939 set_secondary_supers(interfaces); |
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940 return NULL; |
0 | 941 } else { |
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942 // Copy transitive interfaces to a temporary growable array to be constructed |
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943 // into the secondary super list with extra slots. |
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944 GrowableArray<Klass*>* secondaries = new GrowableArray<Klass*>(interfaces->length()); |
0 | 945 for (int i = 0; i < interfaces->length(); i++) { |
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946 secondaries->push(interfaces->at(i)); |
0 | 947 } |
948 return secondaries; | |
949 } | |
950 } | |
951 | |
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952 bool InstanceKlass::compute_is_subtype_of(Klass* k) { |
6983 | 953 if (k->is_interface()) { |
0 | 954 return implements_interface(k); |
955 } else { | |
956 return Klass::compute_is_subtype_of(k); | |
957 } | |
958 } | |
959 | |
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960 bool InstanceKlass::implements_interface(Klass* k) const { |
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961 if (this == k) return true; |
6983 | 962 assert(k->is_interface(), "should be an interface class"); |
0 | 963 for (int i = 0; i < transitive_interfaces()->length(); i++) { |
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964 if (transitive_interfaces()->at(i) == k) { |
0 | 965 return true; |
966 } | |
967 } | |
968 return false; | |
969 } | |
970 | |
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971 objArrayOop InstanceKlass::allocate_objArray(int n, int length, TRAPS) { |
0 | 972 if (length < 0) THROW_0(vmSymbols::java_lang_NegativeArraySizeException()); |
973 if (length > arrayOopDesc::max_array_length(T_OBJECT)) { | |
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974 report_java_out_of_memory("Requested array size exceeds VM limit"); |
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975 JvmtiExport::post_array_size_exhausted(); |
0 | 976 THROW_OOP_0(Universe::out_of_memory_error_array_size()); |
977 } | |
978 int size = objArrayOopDesc::object_size(length); | |
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979 Klass* ak = array_klass(n, CHECK_NULL); |
0 | 980 KlassHandle h_ak (THREAD, ak); |
981 objArrayOop o = | |
982 (objArrayOop)CollectedHeap::array_allocate(h_ak, size, length, CHECK_NULL); | |
983 return o; | |
984 } | |
985 | |
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986 instanceOop InstanceKlass::register_finalizer(instanceOop i, TRAPS) { |
0 | 987 if (TraceFinalizerRegistration) { |
988 tty->print("Registered "); | |
989 i->print_value_on(tty); | |
990 tty->print_cr(" (" INTPTR_FORMAT ") as finalizable", (address)i); | |
991 } | |
992 instanceHandle h_i(THREAD, i); | |
993 // Pass the handle as argument, JavaCalls::call expects oop as jobjects | |
994 JavaValue result(T_VOID); | |
995 JavaCallArguments args(h_i); | |
996 methodHandle mh (THREAD, Universe::finalizer_register_method()); | |
997 JavaCalls::call(&result, mh, &args, CHECK_NULL); | |
998 return h_i(); | |
999 } | |
1000 | |
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1001 instanceOop InstanceKlass::allocate_instance(TRAPS) { |
0 | 1002 bool has_finalizer_flag = has_finalizer(); // Query before possible GC |
1003 int size = size_helper(); // Query before forming handle. | |
1004 | |
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1005 KlassHandle h_k(THREAD, this); |
0 | 1006 |
1007 instanceOop i; | |
1008 | |
1009 i = (instanceOop)CollectedHeap::obj_allocate(h_k, size, CHECK_NULL); | |
1010 if (has_finalizer_flag && !RegisterFinalizersAtInit) { | |
1011 i = register_finalizer(i, CHECK_NULL); | |
1012 } | |
1013 return i; | |
1014 } | |
1015 | |
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1016 void InstanceKlass::check_valid_for_instantiation(bool throwError, TRAPS) { |
0 | 1017 if (is_interface() || is_abstract()) { |
1018 ResourceMark rm(THREAD); | |
1019 THROW_MSG(throwError ? vmSymbols::java_lang_InstantiationError() | |
1020 : vmSymbols::java_lang_InstantiationException(), external_name()); | |
1021 } | |
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1022 if (this == SystemDictionary::Class_klass()) { |
0 | 1023 ResourceMark rm(THREAD); |
1024 THROW_MSG(throwError ? vmSymbols::java_lang_IllegalAccessError() | |
1025 : vmSymbols::java_lang_IllegalAccessException(), external_name()); | |
1026 } | |
1027 } | |
1028 | |
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1029 Klass* InstanceKlass::array_klass_impl(bool or_null, int n, TRAPS) { |
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1030 instanceKlassHandle this_oop(THREAD, this); |
0 | 1031 return array_klass_impl(this_oop, or_null, n, THREAD); |
1032 } | |
1033 | |
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1034 Klass* InstanceKlass::array_klass_impl(instanceKlassHandle this_oop, bool or_null, int n, TRAPS) { |
0 | 1035 if (this_oop->array_klasses() == NULL) { |
1036 if (or_null) return NULL; | |
1037 | |
1038 ResourceMark rm; | |
1039 JavaThread *jt = (JavaThread *)THREAD; | |
1040 { | |
1041 // Atomic creation of array_klasses | |
1042 MutexLocker mc(Compile_lock, THREAD); // for vtables | |
1043 MutexLocker ma(MultiArray_lock, THREAD); | |
1044 | |
1045 // Check if update has already taken place | |
1046 if (this_oop->array_klasses() == NULL) { | |
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1047 Klass* k = ObjArrayKlass::allocate_objArray_klass(this_oop->class_loader_data(), 1, this_oop, CHECK_NULL); |
0 | 1048 this_oop->set_array_klasses(k); |
1049 } | |
1050 } | |
1051 } | |
1052 // _this will always be set at this point | |
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1053 ObjArrayKlass* oak = (ObjArrayKlass*)this_oop->array_klasses(); |
0 | 1054 if (or_null) { |
1055 return oak->array_klass_or_null(n); | |
1056 } | |
1057 return oak->array_klass(n, CHECK_NULL); | |
1058 } | |
1059 | |
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1060 Klass* InstanceKlass::array_klass_impl(bool or_null, TRAPS) { |
0 | 1061 return array_klass_impl(or_null, 1, THREAD); |
1062 } | |
1063 | |
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1064 void InstanceKlass::call_class_initializer(TRAPS) { |
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1065 instanceKlassHandle ik (THREAD, this); |
0 | 1066 call_class_initializer_impl(ik, THREAD); |
1067 } | |
1068 | |
1069 static int call_class_initializer_impl_counter = 0; // for debugging | |
1070 | |
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1071 Method* InstanceKlass::class_initializer() { |
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1072 Method* clinit = find_method( |
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1073 vmSymbols::class_initializer_name(), vmSymbols::void_method_signature()); |
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1074 if (clinit != NULL && clinit->has_valid_initializer_flags()) { |
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1075 return clinit; |
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1076 } |
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1077 return NULL; |
0 | 1078 } |
1079 | |
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1080 void InstanceKlass::call_class_initializer_impl(instanceKlassHandle this_oop, TRAPS) { |
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1081 if (ReplayCompiles && |
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1082 (ReplaySuppressInitializers == 1 || |
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1083 ReplaySuppressInitializers >= 2 && this_oop->class_loader() != NULL)) { |
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1084 // Hide the existence of the initializer for the purpose of replaying the compile |
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1085 return; |
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1086 } |
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1087 |
0 | 1088 methodHandle h_method(THREAD, this_oop->class_initializer()); |
1089 assert(!this_oop->is_initialized(), "we cannot initialize twice"); | |
1090 if (TraceClassInitialization) { | |
1091 tty->print("%d Initializing ", call_class_initializer_impl_counter++); | |
1092 this_oop->name()->print_value(); | |
1093 tty->print_cr("%s (" INTPTR_FORMAT ")", h_method() == NULL ? "(no method)" : "", (address)this_oop()); | |
1094 } | |
1095 if (h_method() != NULL) { | |
1096 JavaCallArguments args; // No arguments | |
1097 JavaValue result(T_VOID); | |
1098 JavaCalls::call(&result, h_method, &args, CHECK); // Static call (no args) | |
1099 } | |
1100 } | |
1101 | |
1102 | |
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1103 void InstanceKlass::mask_for(methodHandle method, int bci, |
0 | 1104 InterpreterOopMap* entry_for) { |
1105 // Dirty read, then double-check under a lock. | |
1106 if (_oop_map_cache == NULL) { | |
1107 // Otherwise, allocate a new one. | |
1108 MutexLocker x(OopMapCacheAlloc_lock); | |
1109 // First time use. Allocate a cache in C heap | |
1110 if (_oop_map_cache == NULL) { | |
1111 _oop_map_cache = new OopMapCache(); | |
1112 } | |
1113 } | |
1114 // _oop_map_cache is constant after init; lookup below does is own locking. | |
1115 _oop_map_cache->lookup(method, bci, entry_for); | |
1116 } | |
1117 | |
1118 | |
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1119 bool InstanceKlass::find_local_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const { |
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1120 for (JavaFieldStream fs(this); !fs.done(); fs.next()) { |
3938 | 1121 Symbol* f_name = fs.name(); |
1122 Symbol* f_sig = fs.signature(); | |
0 | 1123 if (f_name == name && f_sig == sig) { |
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1124 fd->initialize(const_cast<InstanceKlass*>(this), fs.index()); |
0 | 1125 return true; |
1126 } | |
1127 } | |
1128 return false; | |
1129 } | |
1130 | |
1131 | |
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1132 Klass* InstanceKlass::find_interface_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const { |
0 | 1133 const int n = local_interfaces()->length(); |
1134 for (int i = 0; i < n; i++) { | |
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1135 Klass* intf1 = local_interfaces()->at(i); |
6983 | 1136 assert(intf1->is_interface(), "just checking type"); |
0 | 1137 // search for field in current interface |
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1138 if (InstanceKlass::cast(intf1)->find_local_field(name, sig, fd)) { |
0 | 1139 assert(fd->is_static(), "interface field must be static"); |
1140 return intf1; | |
1141 } | |
1142 // search for field in direct superinterfaces | |
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1143 Klass* intf2 = InstanceKlass::cast(intf1)->find_interface_field(name, sig, fd); |
0 | 1144 if (intf2 != NULL) return intf2; |
1145 } | |
1146 // otherwise field lookup fails | |
1147 return NULL; | |
1148 } | |
1149 | |
1150 | |
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1151 Klass* InstanceKlass::find_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const { |
0 | 1152 // search order according to newest JVM spec (5.4.3.2, p.167). |
1153 // 1) search for field in current klass | |
1154 if (find_local_field(name, sig, fd)) { | |
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1155 return const_cast<InstanceKlass*>(this); |
0 | 1156 } |
1157 // 2) search for field recursively in direct superinterfaces | |
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1158 { Klass* intf = find_interface_field(name, sig, fd); |
0 | 1159 if (intf != NULL) return intf; |
1160 } | |
1161 // 3) apply field lookup recursively if superclass exists | |
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1162 { Klass* supr = super(); |
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1163 if (supr != NULL) return InstanceKlass::cast(supr)->find_field(name, sig, fd); |
0 | 1164 } |
1165 // 4) otherwise field lookup fails | |
1166 return NULL; | |
1167 } | |
1168 | |
1169 | |
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1170 Klass* InstanceKlass::find_field(Symbol* name, Symbol* sig, bool is_static, fieldDescriptor* fd) const { |
0 | 1171 // search order according to newest JVM spec (5.4.3.2, p.167). |
1172 // 1) search for field in current klass | |
1173 if (find_local_field(name, sig, fd)) { | |
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1174 if (fd->is_static() == is_static) return const_cast<InstanceKlass*>(this); |
0 | 1175 } |
1176 // 2) search for field recursively in direct superinterfaces | |
1177 if (is_static) { | |
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1178 Klass* intf = find_interface_field(name, sig, fd); |
0 | 1179 if (intf != NULL) return intf; |
1180 } | |
1181 // 3) apply field lookup recursively if superclass exists | |
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1182 { Klass* supr = super(); |
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1183 if (supr != NULL) return InstanceKlass::cast(supr)->find_field(name, sig, is_static, fd); |
0 | 1184 } |
1185 // 4) otherwise field lookup fails | |
1186 return NULL; | |
1187 } | |
1188 | |
1189 | |
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1190 bool InstanceKlass::find_local_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const { |
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1191 for (JavaFieldStream fs(this); !fs.done(); fs.next()) { |
3938 | 1192 if (fs.offset() == offset) { |
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1193 fd->initialize(const_cast<InstanceKlass*>(this), fs.index()); |
0 | 1194 if (fd->is_static() == is_static) return true; |
1195 } | |
1196 } | |
1197 return false; | |
1198 } | |
1199 | |
1200 | |
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1201 bool InstanceKlass::find_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const { |
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1202 Klass* klass = const_cast<InstanceKlass*>(this); |
0 | 1203 while (klass != NULL) { |
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1204 if (InstanceKlass::cast(klass)->find_local_field_from_offset(offset, is_static, fd)) { |
0 | 1205 return true; |
1206 } | |
6983 | 1207 klass = klass->super(); |
0 | 1208 } |
1209 return false; | |
1210 } | |
1211 | |
1212 | |
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1213 void InstanceKlass::methods_do(void f(Method* method)) { |
0 | 1214 int len = methods()->length(); |
1215 for (int index = 0; index < len; index++) { | |
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1216 Method* m = methods()->at(index); |
0 | 1217 assert(m->is_method(), "must be method"); |
1218 f(m); | |
1219 } | |
1220 } | |
1221 | |
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1222 |
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1223 void InstanceKlass::do_local_static_fields(FieldClosure* cl) { |
3938 | 1224 for (JavaFieldStream fs(this); !fs.done(); fs.next()) { |
1225 if (fs.access_flags().is_static()) { | |
1226 fieldDescriptor fd; | |
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1227 fd.initialize(this, fs.index()); |
3938 | 1228 cl->do_field(&fd); |
1229 } | |
0 | 1230 } |
1231 } | |
1232 | |
1233 | |
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1234 void InstanceKlass::do_local_static_fields(void f(fieldDescriptor*, TRAPS), TRAPS) { |
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1235 instanceKlassHandle h_this(THREAD, this); |
0 | 1236 do_local_static_fields_impl(h_this, f, CHECK); |
1237 } | |
1238 | |
1239 | |
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1240 void InstanceKlass::do_local_static_fields_impl(instanceKlassHandle this_oop, void f(fieldDescriptor* fd, TRAPS), TRAPS) { |
3938 | 1241 for (JavaFieldStream fs(this_oop()); !fs.done(); fs.next()) { |
1242 if (fs.access_flags().is_static()) { | |
1243 fieldDescriptor fd; | |
1244 fd.initialize(this_oop(), fs.index()); | |
1245 f(&fd, CHECK); | |
1246 } | |
0 | 1247 } |
1248 } | |
1249 | |
1250 | |
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1251 static int compare_fields_by_offset(int* a, int* b) { |
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1252 return a[0] - b[0]; |
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1253 } |
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1254 |
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1255 void InstanceKlass::do_nonstatic_fields(FieldClosure* cl) { |
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1256 InstanceKlass* super = superklass(); |
0 | 1257 if (super != NULL) { |
1258 super->do_nonstatic_fields(cl); | |
1259 } | |
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1260 fieldDescriptor fd; |
3938 | 1261 int length = java_fields_count(); |
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1262 // In DebugInfo nonstatic fields are sorted by offset. |
6197 | 1263 int* fields_sorted = NEW_C_HEAP_ARRAY(int, 2*(length+1), mtClass); |
44
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1264 int j = 0; |
3938 | 1265 for (int i = 0; i < length; i += 1) { |
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1266 fd.initialize(this, i); |
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1267 if (!fd.is_static()) { |
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1268 fields_sorted[j + 0] = fd.offset(); |
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1269 fields_sorted[j + 1] = i; |
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1270 j += 2; |
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1271 } |
0 | 1272 } |
44
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1273 if (j > 0) { |
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1274 length = j; |
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1275 // _sort_Fn is defined in growableArray.hpp. |
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1276 qsort(fields_sorted, length/2, 2*sizeof(int), (_sort_Fn)compare_fields_by_offset); |
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1277 for (int i = 0; i < length; i += 2) { |
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1278 fd.initialize(this, fields_sorted[i + 1]); |
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1279 assert(!fd.is_static() && fd.offset() == fields_sorted[i], "only nonstatic fields"); |
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1280 cl->do_field(&fd); |
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1281 } |
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1282 } |
6197 | 1283 FREE_C_HEAP_ARRAY(int, fields_sorted, mtClass); |
0 | 1284 } |
1285 | |
1286 | |
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1287 void InstanceKlass::array_klasses_do(void f(Klass* k, TRAPS), TRAPS) { |
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1288 if (array_klasses() != NULL) |
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1289 ArrayKlass::cast(array_klasses())->array_klasses_do(f, THREAD); |
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1290 } |
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1291 |
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1292 void InstanceKlass::array_klasses_do(void f(Klass* k)) { |
0 | 1293 if (array_klasses() != NULL) |
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1294 ArrayKlass::cast(array_klasses())->array_klasses_do(f); |
0 | 1295 } |
1296 | |
1297 | |
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1298 void InstanceKlass::with_array_klasses_do(void f(Klass* k)) { |
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1299 f(this); |
0 | 1300 array_klasses_do(f); |
1301 } | |
1302 | |
1303 #ifdef ASSERT | |
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1304 static int linear_search(Array<Method*>* methods, Symbol* name, Symbol* signature) { |
0 | 1305 int len = methods->length(); |
1306 for (int index = 0; index < len; index++) { | |
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1307 Method* m = methods->at(index); |
0 | 1308 assert(m->is_method(), "must be method"); |
1309 if (m->signature() == signature && m->name() == name) { | |
1310 return index; | |
1311 } | |
1312 } | |
1313 return -1; | |
1314 } | |
1315 #endif | |
1316 | |
6934 | 1317 static int binary_search(Array<Method*>* methods, Symbol* name) { |
0 | 1318 int len = methods->length(); |
1319 // methods are sorted, so do binary search | |
1320 int l = 0; | |
1321 int h = len - 1; | |
1322 while (l <= h) { | |
1323 int mid = (l + h) >> 1; | |
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1324 Method* m = methods->at(mid); |
0 | 1325 assert(m->is_method(), "must be method"); |
1326 int res = m->name()->fast_compare(name); | |
1327 if (res == 0) { | |
6934 | 1328 return mid; |
0 | 1329 } else if (res < 0) { |
1330 l = mid + 1; | |
1331 } else { | |
1332 h = mid - 1; | |
1333 } | |
1334 } | |
6934 | 1335 return -1; |
1336 } | |
1337 | |
1338 Method* InstanceKlass::find_method(Symbol* name, Symbol* signature) const { | |
1339 return InstanceKlass::find_method(methods(), name, signature); | |
1340 } | |
1341 | |
1342 Method* InstanceKlass::find_method( | |
1343 Array<Method*>* methods, Symbol* name, Symbol* signature) { | |
1344 int hit = binary_search(methods, name); | |
1345 if (hit != -1) { | |
1346 Method* m = methods->at(hit); | |
1347 // Do linear search to find matching signature. First, quick check | |
1348 // for common case | |
1349 if (m->signature() == signature) return m; | |
1350 // search downwards through overloaded methods | |
1351 int i; | |
1352 for (i = hit - 1; i >= 0; --i) { | |
1353 Method* m = methods->at(i); | |
1354 assert(m->is_method(), "must be method"); | |
1355 if (m->name() != name) break; | |
1356 if (m->signature() == signature) return m; | |
1357 } | |
1358 // search upwards | |
1359 for (i = hit + 1; i < methods->length(); ++i) { | |
1360 Method* m = methods->at(i); | |
1361 assert(m->is_method(), "must be method"); | |
1362 if (m->name() != name) break; | |
1363 if (m->signature() == signature) return m; | |
1364 } | |
1365 // not found | |
0 | 1366 #ifdef ASSERT |
6934 | 1367 int index = linear_search(methods, name, signature); |
1368 assert(index == -1, err_msg("binary search should have found entry %d", index)); | |
0 | 1369 #endif |
6934 | 1370 } |
0 | 1371 return NULL; |
1372 } | |
1373 | |
6934 | 1374 int InstanceKlass::find_method_by_name(Symbol* name, int* end) { |
1375 return find_method_by_name(methods(), name, end); | |
1376 } | |
1377 | |
1378 int InstanceKlass::find_method_by_name( | |
1379 Array<Method*>* methods, Symbol* name, int* end_ptr) { | |
1380 assert(end_ptr != NULL, "just checking"); | |
1381 int start = binary_search(methods, name); | |
1382 int end = start + 1; | |
1383 if (start != -1) { | |
1384 while (start - 1 >= 0 && (methods->at(start - 1))->name() == name) --start; | |
1385 while (end < methods->length() && (methods->at(end))->name() == name) ++end; | |
1386 *end_ptr = end; | |
1387 return start; | |
1388 } | |
1389 return -1; | |
1390 } | |
1391 | |
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1392 Method* InstanceKlass::uncached_lookup_method(Symbol* name, Symbol* signature) const { |
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1393 Klass* klass = const_cast<InstanceKlass*>(this); |
0 | 1394 while (klass != NULL) { |
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1395 Method* method = InstanceKlass::cast(klass)->find_method(name, signature); |
0 | 1396 if (method != NULL) return method; |
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1397 klass = InstanceKlass::cast(klass)->super(); |
0 | 1398 } |
1399 return NULL; | |
1400 } | |
1401 | |
1402 // lookup a method in all the interfaces that this class implements | |
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1403 Method* InstanceKlass::lookup_method_in_all_interfaces(Symbol* name, |
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1404 Symbol* signature) const { |
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1405 Array<Klass*>* all_ifs = transitive_interfaces(); |
0 | 1406 int num_ifs = all_ifs->length(); |
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1407 InstanceKlass *ik = NULL; |
0 | 1408 for (int i = 0; i < num_ifs; i++) { |
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1409 ik = InstanceKlass::cast(all_ifs->at(i)); |
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1410 Method* m = ik->lookup_method(name, signature); |
0 | 1411 if (m != NULL) { |
1412 return m; | |
1413 } | |
1414 } | |
1415 return NULL; | |
1416 } | |
1417 | |
1418 /* jni_id_for_impl for jfieldIds only */ | |
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1419 JNIid* InstanceKlass::jni_id_for_impl(instanceKlassHandle this_oop, int offset) { |
0 | 1420 MutexLocker ml(JfieldIdCreation_lock); |
1421 // Retry lookup after we got the lock | |
1422 JNIid* probe = this_oop->jni_ids() == NULL ? NULL : this_oop->jni_ids()->find(offset); | |
1423 if (probe == NULL) { | |
1424 // Slow case, allocate new static field identifier | |
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1425 probe = new JNIid(this_oop(), offset, this_oop->jni_ids()); |
0 | 1426 this_oop->set_jni_ids(probe); |
1427 } | |
1428 return probe; | |
1429 } | |
1430 | |
1431 | |
1432 /* jni_id_for for jfieldIds only */ | |
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1433 JNIid* InstanceKlass::jni_id_for(int offset) { |
0 | 1434 JNIid* probe = jni_ids() == NULL ? NULL : jni_ids()->find(offset); |
1435 if (probe == NULL) { | |
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1436 probe = jni_id_for_impl(this, offset); |
0 | 1437 } |
1438 return probe; | |
1439 } | |
1440 | |
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1441 u2 InstanceKlass::enclosing_method_data(int offset) { |
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1442 Array<jushort>* inner_class_list = inner_classes(); |
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1443 if (inner_class_list == NULL) { |
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1444 return 0; |
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1445 } |
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1446 int length = inner_class_list->length(); |
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1447 if (length % inner_class_next_offset == 0) { |
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1448 return 0; |
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1449 } else { |
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1450 int index = length - enclosing_method_attribute_size; |
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1451 assert(offset < enclosing_method_attribute_size, "invalid offset"); |
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1452 return inner_class_list->at(index + offset); |
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1453 } |
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1454 } |
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1455 |
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1456 void InstanceKlass::set_enclosing_method_indices(u2 class_index, |
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1457 u2 method_index) { |
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1458 Array<jushort>* inner_class_list = inner_classes(); |
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1459 assert (inner_class_list != NULL, "_inner_classes list is not set up"); |
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1460 int length = inner_class_list->length(); |
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1461 if (length % inner_class_next_offset == enclosing_method_attribute_size) { |
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1462 int index = length - enclosing_method_attribute_size; |
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1463 inner_class_list->at_put( |
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1464 index + enclosing_method_class_index_offset, class_index); |
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1465 inner_class_list->at_put( |
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1466 index + enclosing_method_method_index_offset, method_index); |
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1467 } |
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1468 } |
0 | 1469 |
1470 // Lookup or create a jmethodID. | |
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1471 // This code is called by the VMThread and JavaThreads so the |
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1472 // locking has to be done very carefully to avoid deadlocks |
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1473 // and/or other cache consistency problems. |
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1474 // |
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1475 jmethodID InstanceKlass::get_jmethod_id(instanceKlassHandle ik_h, methodHandle method_h) { |
0 | 1476 size_t idnum = (size_t)method_h->method_idnum(); |
1477 jmethodID* jmeths = ik_h->methods_jmethod_ids_acquire(); | |
1478 size_t length = 0; | |
1479 jmethodID id = NULL; | |
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1480 |
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1481 // We use a double-check locking idiom here because this cache is |
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1482 // performance sensitive. In the normal system, this cache only |
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1483 // transitions from NULL to non-NULL which is safe because we use |
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1484 // release_set_methods_jmethod_ids() to advertise the new cache. |
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1485 // A partially constructed cache should never be seen by a racing |
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1486 // thread. We also use release_store_ptr() to save a new jmethodID |
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1487 // in the cache so a partially constructed jmethodID should never be |
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1488 // seen either. Cache reads of existing jmethodIDs proceed without a |
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1489 // lock, but cache writes of a new jmethodID requires uniqueness and |
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1490 // creation of the cache itself requires no leaks so a lock is |
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1491 // generally acquired in those two cases. |
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1492 // |
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1493 // If the RedefineClasses() API has been used, then this cache can |
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1494 // grow and we'll have transitions from non-NULL to bigger non-NULL. |
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1495 // Cache creation requires no leaks and we require safety between all |
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1496 // cache accesses and freeing of the old cache so a lock is generally |
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1497 // acquired when the RedefineClasses() API has been used. |
0 | 1498 |
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1499 if (jmeths != NULL) { |
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1500 // the cache already exists |
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1501 if (!ik_h->idnum_can_increment()) { |
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1502 // the cache can't grow so we can just get the current values |
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1503 get_jmethod_id_length_value(jmeths, idnum, &length, &id); |
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1504 } else { |
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1505 // cache can grow so we have to be more careful |
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1506 if (Threads::number_of_threads() == 0 || |
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1507 SafepointSynchronize::is_at_safepoint()) { |
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1508 // we're single threaded or at a safepoint - no locking needed |
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1509 get_jmethod_id_length_value(jmeths, idnum, &length, &id); |
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1510 } else { |
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1511 MutexLocker ml(JmethodIdCreation_lock); |
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1512 get_jmethod_id_length_value(jmeths, idnum, &length, &id); |
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1513 } |
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1514 } |
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1515 } |
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1516 // implied else: |
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1517 // we need to allocate a cache so default length and id values are good |
0 | 1518 |
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1519 if (jmeths == NULL || // no cache yet |
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1520 length <= idnum || // cache is too short |
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1521 id == NULL) { // cache doesn't contain entry |
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1522 |
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1523 // This function can be called by the VMThread so we have to do all |
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1524 // things that might block on a safepoint before grabbing the lock. |
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1525 // Otherwise, we can deadlock with the VMThread or have a cache |
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1526 // consistency issue. These vars keep track of what we might have |
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1527 // to free after the lock is dropped. |
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1528 jmethodID to_dealloc_id = NULL; |
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1529 jmethodID* to_dealloc_jmeths = NULL; |
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1530 |
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1531 // may not allocate new_jmeths or use it if we allocate it |
0 | 1532 jmethodID* new_jmeths = NULL; |
1533 if (length <= idnum) { | |
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1534 // allocate a new cache that might be used |
0 | 1535 size_t size = MAX2(idnum+1, (size_t)ik_h->idnum_allocated_count()); |
6197 | 1536 new_jmeths = NEW_C_HEAP_ARRAY(jmethodID, size+1, mtClass); |
0 | 1537 memset(new_jmeths, 0, (size+1)*sizeof(jmethodID)); |
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1538 // cache size is stored in element[0], other elements offset by one |
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1539 new_jmeths[0] = (jmethodID)size; |
0 | 1540 } |
1541 | |
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1542 // allocate a new jmethodID that might be used |
0 | 1543 jmethodID new_id = NULL; |
1544 if (method_h->is_old() && !method_h->is_obsolete()) { | |
1545 // The method passed in is old (but not obsolete), we need to use the current version | |
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1546 Method* current_method = ik_h->method_with_idnum((int)idnum); |
0 | 1547 assert(current_method != NULL, "old and but not obsolete, so should exist"); |
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1548 new_id = Method::make_jmethod_id(ik_h->class_loader_data(), current_method); |
0 | 1549 } else { |
1550 // It is the current version of the method or an obsolete method, | |
1551 // use the version passed in | |
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1552 new_id = Method::make_jmethod_id(ik_h->class_loader_data(), method_h()); |
0 | 1553 } |
1554 | |
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1555 if (Threads::number_of_threads() == 0 || |
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1556 SafepointSynchronize::is_at_safepoint()) { |
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1557 // we're single threaded or at a safepoint - no locking needed |
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1558 id = get_jmethod_id_fetch_or_update(ik_h, idnum, new_id, new_jmeths, |
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1559 &to_dealloc_id, &to_dealloc_jmeths); |
49
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1560 } else { |
0 | 1561 MutexLocker ml(JmethodIdCreation_lock); |
977
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1562 id = get_jmethod_id_fetch_or_update(ik_h, idnum, new_id, new_jmeths, |
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|
1563 &to_dealloc_id, &to_dealloc_jmeths); |
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1564 } |
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|
1565 |
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1566 // The lock has been dropped so we can free resources. |
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1567 // Free up either the old cache or the new cache if we allocated one. |
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1568 if (to_dealloc_jmeths != NULL) { |
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1569 FreeHeap(to_dealloc_jmeths); |
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|
1570 } |
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1571 // free up the new ID since it wasn't needed |
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1572 if (to_dealloc_id != NULL) { |
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1573 Method::destroy_jmethod_id(ik_h->class_loader_data(), to_dealloc_id); |
49
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1574 } |
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1575 } |
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1576 return id; |
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1577 } |
0 | 1578 |
49
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1579 |
977
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1580 // Common code to fetch the jmethodID from the cache or update the |
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1581 // cache with the new jmethodID. This function should never do anything |
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1582 // that causes the caller to go to a safepoint or we can deadlock with |
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1583 // the VMThread or have cache consistency issues. |
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1584 // |
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1585 jmethodID InstanceKlass::get_jmethod_id_fetch_or_update( |
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1586 instanceKlassHandle ik_h, size_t idnum, jmethodID new_id, |
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1587 jmethodID* new_jmeths, jmethodID* to_dealloc_id_p, |
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1588 jmethodID** to_dealloc_jmeths_p) { |
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1589 assert(new_id != NULL, "sanity check"); |
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1590 assert(to_dealloc_id_p != NULL, "sanity check"); |
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|
1591 assert(to_dealloc_jmeths_p != NULL, "sanity check"); |
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1592 assert(Threads::number_of_threads() == 0 || |
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1593 SafepointSynchronize::is_at_safepoint() || |
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1594 JmethodIdCreation_lock->owned_by_self(), "sanity check"); |
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1595 |
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1596 // reacquire the cache - we are locked, single threaded or at a safepoint |
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1597 jmethodID* jmeths = ik_h->methods_jmethod_ids_acquire(); |
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1598 jmethodID id = NULL; |
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1599 size_t length = 0; |
0 | 1600 |
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1601 if (jmeths == NULL || // no cache yet |
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1602 (length = (size_t)jmeths[0]) <= idnum) { // cache is too short |
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1603 if (jmeths != NULL) { |
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1604 // copy any existing entries from the old cache |
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1605 for (size_t index = 0; index < length; index++) { |
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1606 new_jmeths[index+1] = jmeths[index+1]; |
0 | 1607 } |
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1608 *to_dealloc_jmeths_p = jmeths; // save old cache for later delete |
0 | 1609 } |
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1610 ik_h->release_set_methods_jmethod_ids(jmeths = new_jmeths); |
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1611 } else { |
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1612 // fetch jmethodID (if any) from the existing cache |
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1613 id = jmeths[idnum+1]; |
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1614 *to_dealloc_jmeths_p = new_jmeths; // save new cache for later delete |
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1615 } |
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1616 if (id == NULL) { |
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1617 // No matching jmethodID in the existing cache or we have a new |
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1618 // cache or we just grew the cache. This cache write is done here |
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1619 // by the first thread to win the foot race because a jmethodID |
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1620 // needs to be unique once it is generally available. |
49
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1621 id = new_id; |
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1622 |
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1623 // The jmethodID cache can be read while unlocked so we have to |
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1624 // make sure the new jmethodID is complete before installing it |
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1625 // in the cache. |
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1626 OrderAccess::release_store_ptr(&jmeths[idnum+1], id); |
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1627 } else { |
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1628 *to_dealloc_id_p = new_id; // save new id for later delete |
0 | 1629 } |
1630 return id; | |
1631 } | |
1632 | |
1633 | |
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1634 // Common code to get the jmethodID cache length and the jmethodID |
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1635 // value at index idnum if there is one. |
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1636 // |
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1637 void InstanceKlass::get_jmethod_id_length_value(jmethodID* cache, |
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1638 size_t idnum, size_t *length_p, jmethodID* id_p) { |
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1639 assert(cache != NULL, "sanity check"); |
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1640 assert(length_p != NULL, "sanity check"); |
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1641 assert(id_p != NULL, "sanity check"); |
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1642 |
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1643 // cache size is stored in element[0], other elements offset by one |
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1644 *length_p = (size_t)cache[0]; |
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1645 if (*length_p <= idnum) { // cache is too short |
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|
1646 *id_p = NULL; |
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1647 } else { |
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1648 *id_p = cache[idnum+1]; // fetch jmethodID (if any) |
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1649 } |
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1650 } |
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1651 |
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1652 |
0 | 1653 // Lookup a jmethodID, NULL if not found. Do no blocking, no allocations, no handles |
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1654 jmethodID InstanceKlass::jmethod_id_or_null(Method* method) { |
0 | 1655 size_t idnum = (size_t)method->method_idnum(); |
1656 jmethodID* jmeths = methods_jmethod_ids_acquire(); | |
1657 size_t length; // length assigned as debugging crumb | |
1658 jmethodID id = NULL; | |
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1659 if (jmeths != NULL && // If there is a cache |
0 | 1660 (length = (size_t)jmeths[0]) > idnum) { // and if it is long enough, |
1661 id = jmeths[idnum+1]; // Look up the id (may be NULL) | |
1662 } | |
1663 return id; | |
1664 } | |
1665 | |
1666 | |
1667 // Cache an itable index | |
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1668 void InstanceKlass::set_cached_itable_index(size_t idnum, int index) { |
0 | 1669 int* indices = methods_cached_itable_indices_acquire(); |
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1670 int* to_dealloc_indices = NULL; |
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1671 |
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1672 // We use a double-check locking idiom here because this cache is |
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1673 // performance sensitive. In the normal system, this cache only |
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1674 // transitions from NULL to non-NULL which is safe because we use |
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1675 // release_set_methods_cached_itable_indices() to advertise the |
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1676 // new cache. A partially constructed cache should never be seen |
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1677 // by a racing thread. Cache reads and writes proceed without a |
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1678 // lock, but creation of the cache itself requires no leaks so a |
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1679 // lock is generally acquired in that case. |
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1680 // |
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1681 // If the RedefineClasses() API has been used, then this cache can |
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1682 // grow and we'll have transitions from non-NULL to bigger non-NULL. |
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1683 // Cache creation requires no leaks and we require safety between all |
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1684 // cache accesses and freeing of the old cache so a lock is generally |
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1685 // acquired when the RedefineClasses() API has been used. |
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1686 |
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1687 if (indices == NULL || idnum_can_increment()) { |
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1688 // we need a cache or the cache can grow |
0 | 1689 MutexLocker ml(JNICachedItableIndex_lock); |
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1690 // reacquire the cache to see if another thread already did the work |
0 | 1691 indices = methods_cached_itable_indices_acquire(); |
1692 size_t length = 0; | |
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1693 // cache size is stored in element[0], other elements offset by one |
0 | 1694 if (indices == NULL || (length = (size_t)indices[0]) <= idnum) { |
1695 size_t size = MAX2(idnum+1, (size_t)idnum_allocated_count()); | |
6197 | 1696 int* new_indices = NEW_C_HEAP_ARRAY(int, size+1, mtClass); |
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1697 new_indices[0] = (int)size; |
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1698 // copy any existing entries |
0 | 1699 size_t i; |
1700 for (i = 0; i < length; i++) { | |
1701 new_indices[i+1] = indices[i+1]; | |
1702 } | |
1703 // Set all the rest to -1 | |
1704 for (i = length; i < size; i++) { | |
1705 new_indices[i+1] = -1; | |
1706 } | |
1707 if (indices != NULL) { | |
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1708 // We have an old cache to delete so save it for after we |
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1709 // drop the lock. |
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1710 to_dealloc_indices = indices; |
0 | 1711 } |
1712 release_set_methods_cached_itable_indices(indices = new_indices); | |
1713 } | |
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1714 |
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1715 if (idnum_can_increment()) { |
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1716 // this cache can grow so we have to write to it safely |
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1717 indices[idnum+1] = index; |
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1718 } |
0 | 1719 } else { |
1720 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); | |
1721 } | |
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1722 |
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1723 if (!idnum_can_increment()) { |
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1724 // The cache cannot grow and this JNI itable index value does not |
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1725 // have to be unique like a jmethodID. If there is a race to set it, |
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1726 // it doesn't matter. |
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1727 indices[idnum+1] = index; |
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1728 } |
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1729 |
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1730 if (to_dealloc_indices != NULL) { |
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1731 // we allocated a new cache so free the old one |
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1732 FreeHeap(to_dealloc_indices); |
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1733 } |
0 | 1734 } |
1735 | |
1736 | |
1737 // Retrieve a cached itable index | |
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1738 int InstanceKlass::cached_itable_index(size_t idnum) { |
0 | 1739 int* indices = methods_cached_itable_indices_acquire(); |
1740 if (indices != NULL && ((size_t)indices[0]) > idnum) { | |
1741 // indices exist and are long enough, retrieve possible cached | |
1742 return indices[idnum+1]; | |
1743 } | |
1744 return -1; | |
1745 } | |
1746 | |
1747 | |
1748 // | |
1749 // Walk the list of dependent nmethods searching for nmethods which | |
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1750 // are dependent on the changes that were passed in and mark them for |
0 | 1751 // deoptimization. Returns the number of nmethods found. |
1752 // | |
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1753 int InstanceKlass::mark_dependent_nmethods(DepChange& changes) { |
0 | 1754 assert_locked_or_safepoint(CodeCache_lock); |
1755 int found = 0; | |
1756 nmethodBucket* b = _dependencies; | |
1757 while (b != NULL) { | |
1758 nmethod* nm = b->get_nmethod(); | |
1759 // since dependencies aren't removed until an nmethod becomes a zombie, | |
1760 // the dependency list may contain nmethods which aren't alive. | |
1761 if (nm->is_alive() && !nm->is_marked_for_deoptimization() && nm->check_dependency_on(changes)) { | |
1762 if (TraceDependencies) { | |
1763 ResourceMark rm; | |
1764 tty->print_cr("Marked for deoptimization"); | |
1765 tty->print_cr(" context = %s", this->external_name()); | |
1766 changes.print(); | |
1767 nm->print(); | |
1768 nm->print_dependencies(); | |
1769 } | |
1770 nm->mark_for_deoptimization(); | |
1771 found++; | |
1772 } | |
1773 b = b->next(); | |
1774 } | |
1775 return found; | |
1776 } | |
1777 | |
1778 | |
1779 // | |
1780 // Add an nmethodBucket to the list of dependencies for this nmethod. | |
1781 // It's possible that an nmethod has multiple dependencies on this klass | |
1782 // so a count is kept for each bucket to guarantee that creation and | |
1783 // deletion of dependencies is consistent. | |
1784 // | |
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1785 void InstanceKlass::add_dependent_nmethod(nmethod* nm) { |
0 | 1786 assert_locked_or_safepoint(CodeCache_lock); |
1787 nmethodBucket* b = _dependencies; | |
1788 nmethodBucket* last = NULL; | |
1789 while (b != NULL) { | |
1790 if (nm == b->get_nmethod()) { | |
1791 b->increment(); | |
1792 return; | |
1793 } | |
1794 b = b->next(); | |
1795 } | |
1796 _dependencies = new nmethodBucket(nm, _dependencies); | |
1797 } | |
1798 | |
1799 | |
1800 // | |
1801 // Decrement count of the nmethod in the dependency list and remove | |
1802 // the bucket competely when the count goes to 0. This method must | |
1803 // find a corresponding bucket otherwise there's a bug in the | |
1804 // recording of dependecies. | |
1805 // | |
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1806 void InstanceKlass::remove_dependent_nmethod(nmethod* nm) { |
0 | 1807 assert_locked_or_safepoint(CodeCache_lock); |
1808 nmethodBucket* b = _dependencies; | |
1809 nmethodBucket* last = NULL; | |
1810 while (b != NULL) { | |
1811 if (nm == b->get_nmethod()) { | |
1812 if (b->decrement() == 0) { | |
1813 if (last == NULL) { | |
1814 _dependencies = b->next(); | |
1815 } else { | |
1816 last->set_next(b->next()); | |
1817 } | |
1818 delete b; | |
1819 } | |
1820 return; | |
1821 } | |
1822 last = b; | |
1823 b = b->next(); | |
1824 } | |
1825 #ifdef ASSERT | |
1826 tty->print_cr("### %s can't find dependent nmethod:", this->external_name()); | |
1827 nm->print(); | |
1828 #endif // ASSERT | |
1829 ShouldNotReachHere(); | |
1830 } | |
1831 | |
1832 | |
1833 #ifndef PRODUCT | |
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1834 void InstanceKlass::print_dependent_nmethods(bool verbose) { |
0 | 1835 nmethodBucket* b = _dependencies; |
1836 int idx = 0; | |
1837 while (b != NULL) { | |
1838 nmethod* nm = b->get_nmethod(); | |
1839 tty->print("[%d] count=%d { ", idx++, b->count()); | |
1840 if (!verbose) { | |
1841 nm->print_on(tty, "nmethod"); | |
1842 tty->print_cr(" } "); | |
1843 } else { | |
1844 nm->print(); | |
1845 nm->print_dependencies(); | |
1846 tty->print_cr("--- } "); | |
1847 } | |
1848 b = b->next(); | |
1849 } | |
1850 } | |
1851 | |
1852 | |
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1853 bool InstanceKlass::is_dependent_nmethod(nmethod* nm) { |
0 | 1854 nmethodBucket* b = _dependencies; |
1855 while (b != NULL) { | |
1856 if (nm == b->get_nmethod()) { | |
1857 return true; | |
1858 } | |
1859 b = b->next(); | |
1860 } | |
1861 return false; | |
1862 } | |
1863 #endif //PRODUCT | |
1864 | |
1865 | |
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1866 // Garbage collection |
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1867 |
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1868 void InstanceKlass::oops_do(OopClosure* cl) { |
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1869 Klass::oops_do(cl); |
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1870 |
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1871 cl->do_oop(adr_protection_domain()); |
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1872 cl->do_oop(adr_signers()); |
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1873 cl->do_oop(adr_init_lock()); |
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1874 |
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1875 // Don't walk the arrays since they are walked from the ClassLoaderData objects. |
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1876 } |
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1877 |
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1878 #ifdef ASSERT |
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1879 template <class T> void assert_is_in(T *p) { |
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1880 T heap_oop = oopDesc::load_heap_oop(p); |
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1881 if (!oopDesc::is_null(heap_oop)) { |
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1882 oop o = oopDesc::decode_heap_oop_not_null(heap_oop); |
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1883 assert(Universe::heap()->is_in(o), "should be in heap"); |
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1884 } |
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1885 } |
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1886 template <class T> void assert_is_in_closed_subset(T *p) { |
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1887 T heap_oop = oopDesc::load_heap_oop(p); |
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1888 if (!oopDesc::is_null(heap_oop)) { |
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1889 oop o = oopDesc::decode_heap_oop_not_null(heap_oop); |
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1890 assert(Universe::heap()->is_in_closed_subset(o), |
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1891 err_msg("should be in closed *p " INTPTR_FORMAT " " INTPTR_FORMAT, (address)p, (address)o)); |
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1892 } |
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1893 } |
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1894 template <class T> void assert_is_in_reserved(T *p) { |
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1895 T heap_oop = oopDesc::load_heap_oop(p); |
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1896 if (!oopDesc::is_null(heap_oop)) { |
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1897 oop o = oopDesc::decode_heap_oop_not_null(heap_oop); |
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1898 assert(Universe::heap()->is_in_reserved(o), "should be in reserved"); |
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1899 } |
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1900 } |
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1901 template <class T> void assert_nothing(T *p) {} |
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1902 |
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1903 #else |
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1904 template <class T> void assert_is_in(T *p) {} |
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1905 template <class T> void assert_is_in_closed_subset(T *p) {} |
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1906 template <class T> void assert_is_in_reserved(T *p) {} |
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1907 template <class T> void assert_nothing(T *p) {} |
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1908 #endif // ASSERT |
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1909 |
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1910 // |
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1911 // Macros that iterate over areas of oops which are specialized on type of |
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1912 // oop pointer either narrow or wide, depending on UseCompressedOops |
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1913 // |
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1914 // Parameters are: |
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1915 // T - type of oop to point to (either oop or narrowOop) |
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1916 // start_p - starting pointer for region to iterate over |
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1917 // count - number of oops or narrowOops to iterate over |
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1918 // do_oop - action to perform on each oop (it's arbitrary C code which |
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1919 // makes it more efficient to put in a macro rather than making |
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1920 // it a template function) |
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1921 // assert_fn - assert function which is template function because performance |
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1922 // doesn't matter when enabled. |
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1923 #define InstanceKlass_SPECIALIZED_OOP_ITERATE( \ |
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1924 T, start_p, count, do_oop, \ |
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1925 assert_fn) \ |
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1926 { \ |
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1927 T* p = (T*)(start_p); \ |
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1928 T* const end = p + (count); \ |
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1929 while (p < end) { \ |
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1930 (assert_fn)(p); \ |
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1931 do_oop; \ |
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1932 ++p; \ |
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1933 } \ |
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1934 } |
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1935 |
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1936 #define InstanceKlass_SPECIALIZED_OOP_REVERSE_ITERATE( \ |
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1937 T, start_p, count, do_oop, \ |
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1938 assert_fn) \ |
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1939 { \ |
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1940 T* const start = (T*)(start_p); \ |
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1941 T* p = start + (count); \ |
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1942 while (start < p) { \ |
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1943 --p; \ |
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1944 (assert_fn)(p); \ |
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1945 do_oop; \ |
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1946 } \ |
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1947 } |
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1948 |
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1949 #define InstanceKlass_SPECIALIZED_BOUNDED_OOP_ITERATE( \ |
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1950 T, start_p, count, low, high, \ |
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1951 do_oop, assert_fn) \ |
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1952 { \ |
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1953 T* const l = (T*)(low); \ |
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1954 T* const h = (T*)(high); \ |
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1955 assert(mask_bits((intptr_t)l, sizeof(T)-1) == 0 && \ |
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1956 mask_bits((intptr_t)h, sizeof(T)-1) == 0, \ |
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1957 "bounded region must be properly aligned"); \ |
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1958 T* p = (T*)(start_p); \ |
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1959 T* end = p + (count); \ |
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1960 if (p < l) p = l; \ |
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1961 if (end > h) end = h; \ |
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1962 while (p < end) { \ |
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1963 (assert_fn)(p); \ |
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1964 do_oop; \ |
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1965 ++p; \ |
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1966 } \ |
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1967 } |
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1968 |
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1969 |
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1970 // The following macros call specialized macros, passing either oop or |
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1971 // narrowOop as the specialization type. These test the UseCompressedOops |
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1972 // flag. |
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1973 #define InstanceKlass_OOP_MAP_ITERATE(obj, do_oop, assert_fn) \ |
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1974 { \ |
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1975 /* Compute oopmap block range. The common case \ |
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1976 is nonstatic_oop_map_size == 1. */ \ |
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1977 OopMapBlock* map = start_of_nonstatic_oop_maps(); \ |
938 | 1978 OopMapBlock* const end_map = map + nonstatic_oop_map_count(); \ |
113
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1979 if (UseCompressedOops) { \ |
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1980 while (map < end_map) { \ |
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1981 InstanceKlass_SPECIALIZED_OOP_ITERATE(narrowOop, \ |
938 | 1982 obj->obj_field_addr<narrowOop>(map->offset()), map->count(), \ |
113
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1983 do_oop, assert_fn) \ |
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1984 ++map; \ |
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1985 } \ |
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1986 } else { \ |
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1987 while (map < end_map) { \ |
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1988 InstanceKlass_SPECIALIZED_OOP_ITERATE(oop, \ |
938 | 1989 obj->obj_field_addr<oop>(map->offset()), map->count(), \ |
113
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1990 do_oop, assert_fn) \ |
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1991 ++map; \ |
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1992 } \ |
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1993 } \ |
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1994 } |
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1995 |
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1996 #define InstanceKlass_OOP_MAP_REVERSE_ITERATE(obj, do_oop, assert_fn) \ |
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1997 { \ |
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1998 OopMapBlock* const start_map = start_of_nonstatic_oop_maps(); \ |
938 | 1999 OopMapBlock* map = start_map + nonstatic_oop_map_count(); \ |
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2000 if (UseCompressedOops) { \ |
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2001 while (start_map < map) { \ |
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2002 --map; \ |
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2003 InstanceKlass_SPECIALIZED_OOP_REVERSE_ITERATE(narrowOop, \ |
938 | 2004 obj->obj_field_addr<narrowOop>(map->offset()), map->count(), \ |
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2005 do_oop, assert_fn) \ |
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2006 } \ |
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2007 } else { \ |
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2008 while (start_map < map) { \ |
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2009 --map; \ |
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2010 InstanceKlass_SPECIALIZED_OOP_REVERSE_ITERATE(oop, \ |
938 | 2011 obj->obj_field_addr<oop>(map->offset()), map->count(), \ |
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2012 do_oop, assert_fn) \ |
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2013 } \ |
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2014 } \ |
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2015 } |
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2016 |
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2017 #define InstanceKlass_BOUNDED_OOP_MAP_ITERATE(obj, low, high, do_oop, \ |
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2018 assert_fn) \ |
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2019 { \ |
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2020 /* Compute oopmap block range. The common case is \ |
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2021 nonstatic_oop_map_size == 1, so we accept the \ |
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2022 usually non-existent extra overhead of examining \ |
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2023 all the maps. */ \ |
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2024 OopMapBlock* map = start_of_nonstatic_oop_maps(); \ |
938 | 2025 OopMapBlock* const end_map = map + nonstatic_oop_map_count(); \ |
113
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2026 if (UseCompressedOops) { \ |
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2027 while (map < end_map) { \ |
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2028 InstanceKlass_SPECIALIZED_BOUNDED_OOP_ITERATE(narrowOop, \ |
938 | 2029 obj->obj_field_addr<narrowOop>(map->offset()), map->count(), \ |
113
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2030 low, high, \ |
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2031 do_oop, assert_fn) \ |
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2032 ++map; \ |
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2033 } \ |
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2034 } else { \ |
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2035 while (map < end_map) { \ |
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2036 InstanceKlass_SPECIALIZED_BOUNDED_OOP_ITERATE(oop, \ |
938 | 2037 obj->obj_field_addr<oop>(map->offset()), map->count(), \ |
113
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2038 low, high, \ |
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2039 do_oop, assert_fn) \ |
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2040 ++map; \ |
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2041 } \ |
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2042 } \ |
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2043 } |
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2044 |
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2045 void InstanceKlass::oop_follow_contents(oop obj) { |
113
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2046 assert(obj != NULL, "can't follow the content of NULL object"); |
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2047 MarkSweep::follow_klass(obj->klass()); |
113
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2048 InstanceKlass_OOP_MAP_ITERATE( \ |
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2049 obj, \ |
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2050 MarkSweep::mark_and_push(p), \ |
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2051 assert_is_in_closed_subset) |
0 | 2052 } |
2053 | |
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2054 #if INCLUDE_ALL_GCS |
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2055 void InstanceKlass::oop_follow_contents(ParCompactionManager* cm, |
0 | 2056 oop obj) { |
113
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2057 assert(obj != NULL, "can't follow the content of NULL object"); |
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2058 PSParallelCompact::follow_klass(cm, obj->klass()); |
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2059 // Only mark the header and let the scan of the meta-data mark |
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2060 // everything else. |
113
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2061 InstanceKlass_OOP_MAP_ITERATE( \ |
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2062 obj, \ |
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2063 PSParallelCompact::mark_and_push(cm, p), \ |
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2064 assert_is_in) |
0 | 2065 } |
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2066 #endif // INCLUDE_ALL_GCS |
0 | 2067 |
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2068 // closure's do_metadata() method dictates whether the given closure should be |
0 | 2069 // applied to the klass ptr in the object header. |
2070 | |
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2071 #define if_do_metadata_checked(closure, nv_suffix) \ |
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2072 /* Make sure the non-virtual and the virtual versions match. */ \ |
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2073 assert(closure->do_metadata##nv_suffix() == closure->do_metadata(), \ |
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2074 "Inconsistency in do_metadata"); \ |
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2075 if (closure->do_metadata##nv_suffix()) |
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2076 |
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2077 #define InstanceKlass_OOP_OOP_ITERATE_DEFN(OopClosureType, nv_suffix) \ |
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2078 \ |
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2079 int InstanceKlass::oop_oop_iterate##nv_suffix(oop obj, OopClosureType* closure) { \ |
113
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2080 SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::ik);\ |
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2081 /* header */ \ |
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2082 if_do_metadata_checked(closure, nv_suffix) { \ |
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2083 closure->do_klass##nv_suffix(obj->klass()); \ |
113
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2084 } \ |
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2085 InstanceKlass_OOP_MAP_ITERATE( \ |
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2086 obj, \ |
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2087 SpecializationStats:: \ |
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2088 record_do_oop_call##nv_suffix(SpecializationStats::ik); \ |
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2089 (closure)->do_oop##nv_suffix(p), \ |
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2090 assert_is_in_closed_subset) \ |
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2091 return size_helper(); \ |
0 | 2092 } |
2093 | |
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2094 #if INCLUDE_ALL_GCS |
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2095 #define InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DEFN(OopClosureType, nv_suffix) \ |
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2096 \ |
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2097 int InstanceKlass::oop_oop_iterate_backwards##nv_suffix(oop obj, \ |
342
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2098 OopClosureType* closure) { \ |
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2099 SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::ik); \ |
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2100 /* header */ \ |
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2101 if_do_metadata_checked(closure, nv_suffix) { \ |
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2102 closure->do_klass##nv_suffix(obj->klass()); \ |
342
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2103 } \ |
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2104 /* instance variables */ \ |
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2105 InstanceKlass_OOP_MAP_REVERSE_ITERATE( \ |
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2106 obj, \ |
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2107 SpecializationStats::record_do_oop_call##nv_suffix(SpecializationStats::ik);\ |
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2108 (closure)->do_oop##nv_suffix(p), \ |
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|
2109 assert_is_in_closed_subset) \ |
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2110 return size_helper(); \ |
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2111 } |
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2112 #endif // INCLUDE_ALL_GCS |
342
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2113 |
113
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2114 #define InstanceKlass_OOP_OOP_ITERATE_DEFN_m(OopClosureType, nv_suffix) \ |
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2115 \ |
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2116 int InstanceKlass::oop_oop_iterate##nv_suffix##_m(oop obj, \ |
113
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2117 OopClosureType* closure, \ |
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2118 MemRegion mr) { \ |
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2119 SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::ik);\ |
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2120 if_do_metadata_checked(closure, nv_suffix) { \ |
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2121 if (mr.contains(obj)) { \ |
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2122 closure->do_klass##nv_suffix(obj->klass()); \ |
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2123 } \ |
113
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2124 } \ |
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2125 InstanceKlass_BOUNDED_OOP_MAP_ITERATE( \ |
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2126 obj, mr.start(), mr.end(), \ |
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2127 (closure)->do_oop##nv_suffix(p), \ |
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2128 assert_is_in_closed_subset) \ |
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2129 return size_helper(); \ |
0 | 2130 } |
2131 | |
2132 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_DEFN) | |
342
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2133 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_DEFN) |
0 | 2134 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_DEFN_m) |
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2135 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_DEFN_m) |
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2136 #if INCLUDE_ALL_GCS |
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2137 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DEFN) |
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2138 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DEFN) |
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2139 #endif // INCLUDE_ALL_GCS |
0 | 2140 |
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2141 int InstanceKlass::oop_adjust_pointers(oop obj) { |
0 | 2142 int size = size_helper(); |
113
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2143 InstanceKlass_OOP_MAP_ITERATE( \ |
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2144 obj, \ |
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2145 MarkSweep::adjust_pointer(p), \ |
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2146 assert_is_in) |
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2147 MarkSweep::adjust_klass(obj->klass()); |
0 | 2148 return size; |
2149 } | |
2150 | |
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2151 #if INCLUDE_ALL_GCS |
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2152 void InstanceKlass::oop_push_contents(PSPromotionManager* pm, oop obj) { |
113
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2153 InstanceKlass_OOP_MAP_REVERSE_ITERATE( \ |
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2154 obj, \ |
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2155 if (PSScavenge::should_scavenge(p)) { \ |
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2156 pm->claim_or_forward_depth(p); \ |
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2157 }, \ |
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2158 assert_nothing ) |
0 | 2159 } |
2160 | |
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2161 int InstanceKlass::oop_update_pointers(ParCompactionManager* cm, oop obj) { |
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2162 int size = size_helper(); |
113
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2163 InstanceKlass_OOP_MAP_ITERATE( \ |
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2164 obj, \ |
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2165 PSParallelCompact::adjust_pointer(p), \ |
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2166 assert_is_in) |
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2167 obj->update_header(cm); |
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2168 return size; |
0 | 2169 } |
2170 | |
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2171 #endif // INCLUDE_ALL_GCS |
0 | 2172 |
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2173 void InstanceKlass::clean_implementors_list(BoolObjectClosure* is_alive) { |
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2174 assert(is_loader_alive(is_alive), "this klass should be live"); |
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2175 if (is_interface()) { |
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2176 if (ClassUnloading) { |
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2177 Klass* impl = implementor(); |
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2178 if (impl != NULL) { |
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2179 if (!impl->is_loader_alive(is_alive)) { |
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2180 // remove this guy |
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2181 Klass** klass = adr_implementor(); |
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2182 assert(klass != NULL, "null klass"); |
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2183 if (klass != NULL) { |
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2184 *klass = NULL; |
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2185 } |
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2186 } |
0 | 2187 } |
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2188 } |
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2189 } |
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2190 } |
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2191 |
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2192 void InstanceKlass::clean_method_data(BoolObjectClosure* is_alive) { |
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2193 #ifdef COMPILER2 |
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2194 // Currently only used by C2. |
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2195 for (int m = 0; m < methods()->length(); m++) { |
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2196 MethodData* mdo = methods()->at(m)->method_data(); |
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2197 if (mdo != NULL) { |
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2198 for (ProfileData* data = mdo->first_data(); |
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2199 mdo->is_valid(data); |
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2200 data = mdo->next_data(data)) { |
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2201 data->clean_weak_klass_links(is_alive); |
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2202 } |
0 | 2203 } |
2204 } | |
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2205 #else |
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2206 #ifdef ASSERT |
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2207 // Verify that we haven't started to use MDOs for C1. |
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2208 for (int m = 0; m < methods()->length(); m++) { |
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2209 MethodData* mdo = methods()->at(m)->method_data(); |
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2210 assert(mdo == NULL, "Didn't expect C1 to use MDOs"); |
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2211 } |
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2212 #endif // ASSERT |
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2213 #endif // !COMPILER2 |
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2214 } |
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2215 |
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2216 |
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2217 static void remove_unshareable_in_class(Klass* k) { |
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2218 // remove klass's unshareable info |
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2219 k->remove_unshareable_info(); |
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2220 } |
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2221 |
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2222 void InstanceKlass::remove_unshareable_info() { |
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2223 Klass::remove_unshareable_info(); |
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2224 // Unlink the class |
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2225 if (is_linked()) { |
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2226 unlink_class(); |
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2227 } |
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2228 init_implementor(); |
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2229 |
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2230 constants()->remove_unshareable_info(); |
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2231 |
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2232 for (int i = 0; i < methods()->length(); i++) { |
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2233 Method* m = methods()->at(i); |
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2234 m->remove_unshareable_info(); |
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2235 } |
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2236 |
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2237 // Need to reinstate when reading back the class. |
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2238 set_init_lock(NULL); |
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2239 |
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2240 // do array classes also. |
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2241 array_klasses_do(remove_unshareable_in_class); |
0 | 2242 } |
2243 | |
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2244 void restore_unshareable_in_class(Klass* k, TRAPS) { |
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2245 k->restore_unshareable_info(CHECK); |
0 | 2246 } |
2247 | |
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2248 void InstanceKlass::restore_unshareable_info(TRAPS) { |
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2249 Klass::restore_unshareable_info(CHECK); |
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2250 instanceKlassHandle ik(THREAD, this); |
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2251 |
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2252 Array<Method*>* methods = ik->methods(); |
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2253 int num_methods = methods->length(); |
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2254 for (int index2 = 0; index2 < num_methods; ++index2) { |
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2255 methodHandle m(THREAD, methods->at(index2)); |
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2256 m()->link_method(m, CHECK); |
6733
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2257 // restore method's vtable by calling a virtual function |
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2258 m->restore_vtable(); |
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2259 } |
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2260 if (JvmtiExport::has_redefined_a_class()) { |
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2261 // Reinitialize vtable because RedefineClasses may have changed some |
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2262 // entries in this vtable for super classes so the CDS vtable might |
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2263 // point to old or obsolete entries. RedefineClasses doesn't fix up |
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2264 // vtables in the shared system dictionary, only the main one. |
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2265 // It also redefines the itable too so fix that too. |
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2266 ResourceMark rm(THREAD); |
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2267 ik->vtable()->initialize_vtable(false, CHECK); |
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2268 ik->itable()->initialize_itable(false, CHECK); |
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2269 } |
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2270 |
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2271 // Allocate a simple java object for a lock. |
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2272 // This needs to be a java object because during class initialization |
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2273 // it can be held across a java call. |
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2274 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK); |
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2275 Handle h(THREAD, (oop)r); |
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2276 ik->set_init_lock(h()); |
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2277 |
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2278 // restore constant pool resolved references |
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2279 ik->constants()->restore_unshareable_info(CHECK); |
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2280 |
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2281 ik->array_klasses_do(restore_unshareable_in_class, CHECK); |
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2282 } |
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2283 |
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2284 static void clear_all_breakpoints(Method* m) { |
0 | 2285 m->clear_all_breakpoints(); |
2286 } | |
2287 | |
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2288 void InstanceKlass::release_C_heap_structures() { |
0 | 2289 // Deallocate oop map cache |
2290 if (_oop_map_cache != NULL) { | |
2291 delete _oop_map_cache; | |
2292 _oop_map_cache = NULL; | |
2293 } | |
2294 | |
2295 // Deallocate JNI identifiers for jfieldIDs | |
2296 JNIid::deallocate(jni_ids()); | |
2297 set_jni_ids(NULL); | |
2298 | |
2299 jmethodID* jmeths = methods_jmethod_ids_acquire(); | |
2300 if (jmeths != (jmethodID*)NULL) { | |
2301 release_set_methods_jmethod_ids(NULL); | |
2302 FreeHeap(jmeths); | |
2303 } | |
2304 | |
2305 int* indices = methods_cached_itable_indices_acquire(); | |
2306 if (indices != (int*)NULL) { | |
2307 release_set_methods_cached_itable_indices(NULL); | |
2308 FreeHeap(indices); | |
2309 } | |
2310 | |
2311 // release dependencies | |
2312 nmethodBucket* b = _dependencies; | |
2313 _dependencies = NULL; | |
2314 while (b != NULL) { | |
2315 nmethodBucket* next = b->next(); | |
2316 delete b; | |
2317 b = next; | |
2318 } | |
2319 | |
2320 // Deallocate breakpoint records | |
2321 if (breakpoints() != 0x0) { | |
2322 methods_do(clear_all_breakpoints); | |
2323 assert(breakpoints() == 0x0, "should have cleared breakpoints"); | |
2324 } | |
2325 | |
2326 // deallocate information about previous versions | |
2327 if (_previous_versions != NULL) { | |
2328 for (int i = _previous_versions->length() - 1; i >= 0; i--) { | |
2329 PreviousVersionNode * pv_node = _previous_versions->at(i); | |
2330 delete pv_node; | |
2331 } | |
2332 delete _previous_versions; | |
2333 _previous_versions = NULL; | |
2334 } | |
2335 | |
2336 // deallocate the cached class file | |
2337 if (_cached_class_file_bytes != NULL) { | |
6197 | 2338 os::free(_cached_class_file_bytes, mtClass); |
0 | 2339 _cached_class_file_bytes = NULL; |
2340 _cached_class_file_len = 0; | |
2341 } | |
2177
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2342 |
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2343 // Decrement symbol reference counts associated with the unloaded class. |
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2344 if (_name != NULL) _name->decrement_refcount(); |
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2345 // unreference array name derived from this class name (arrays of an unloaded |
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diff
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|
2346 // class can't be referenced anymore). |
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2347 if (_array_name != NULL) _array_name->decrement_refcount(); |
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2348 if (_source_file_name != NULL) _source_file_name->decrement_refcount(); |
6203
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|
2349 if (_source_debug_extension != NULL) FREE_C_HEAP_ARRAY(char, _source_debug_extension, mtClass); |
7464
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|
2350 |
ecd24264898b
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|
2351 assert(_total_instanceKlass_count >= 1, "Sanity check"); |
ecd24264898b
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2352 Atomic::dec(&_total_instanceKlass_count); |
2177
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2353 } |
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2354 |
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2355 void InstanceKlass::set_source_file_name(Symbol* n) { |
2177
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2356 _source_file_name = n; |
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2357 if (_source_file_name != NULL) _source_file_name->increment_refcount(); |
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|
2358 } |
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|
2359 |
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2360 void InstanceKlass::set_source_debug_extension(char* array, int length) { |
6203
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2361 if (array == NULL) { |
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|
2362 _source_debug_extension = NULL; |
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|
2363 } else { |
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|
2364 // Adding one to the attribute length in order to store a null terminator |
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2365 // character could cause an overflow because the attribute length is |
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|
2366 // already coded with an u4 in the classfile, but in practice, it's |
04ade88d9712
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|
2367 // unlikely to happen. |
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|
2368 assert((length+1) > length, "Overflow checking"); |
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|
2369 char* sde = NEW_C_HEAP_ARRAY(char, (length + 1), mtClass); |
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2370 for (int i = 0; i < length; i++) { |
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|
2371 sde[i] = array[i]; |
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|
2372 } |
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|
2373 sde[length] = '\0'; |
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|
2374 _source_debug_extension = sde; |
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|
2375 } |
0 | 2376 } |
2377 | |
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|
2378 address InstanceKlass::static_field_addr(int offset) { |
6735
aed758eda82a
7195833: NPG: Rename instanceClassLoaderKlass, instanceRefKlass and instanceMirrorKlass
coleenp
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6733
diff
changeset
|
2379 return (address)(offset + InstanceMirrorKlass::offset_of_static_fields() + (intptr_t)java_mirror()); |
2376
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
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diff
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|
2380 } |
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diff
changeset
|
2381 |
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7017732: move static fields into Class to prepare for perm gen removal
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diff
changeset
|
2382 |
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|
2383 const char* InstanceKlass::signature_name() const { |
0 | 2384 const char* src = (const char*) (name()->as_C_string()); |
2385 const int src_length = (int)strlen(src); | |
2386 char* dest = NEW_RESOURCE_ARRAY(char, src_length + 3); | |
2387 int src_index = 0; | |
2388 int dest_index = 0; | |
2389 dest[dest_index++] = 'L'; | |
2390 while (src_index < src_length) { | |
2391 dest[dest_index++] = src[src_index++]; | |
2392 } | |
2393 dest[dest_index++] = ';'; | |
2394 dest[dest_index] = '\0'; | |
2395 return dest; | |
2396 } | |
2397 | |
2398 // different verisons of is_same_class_package | |
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|
2399 bool InstanceKlass::is_same_class_package(Klass* class2) { |
da91efe96a93
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diff
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|
2400 Klass* class1 = this; |
da91efe96a93
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diff
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|
2401 oop classloader1 = InstanceKlass::cast(class1)->class_loader(); |
6983 | 2402 Symbol* classname1 = class1->name(); |
2403 | |
2404 if (class2->oop_is_objArray()) { | |
6831
d8ce2825b193
8000213: NPG: Should have renamed arrayKlass and typeArrayKlass
coleenp
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6735
diff
changeset
|
2405 class2 = ObjArrayKlass::cast(class2)->bottom_klass(); |
0 | 2406 } |
2407 oop classloader2; | |
6983 | 2408 if (class2->oop_is_instance()) { |
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|
2409 classloader2 = InstanceKlass::cast(class2)->class_loader(); |
0 | 2410 } else { |
6983 | 2411 assert(class2->oop_is_typeArray(), "should be type array"); |
0 | 2412 classloader2 = NULL; |
2413 } | |
6983 | 2414 Symbol* classname2 = class2->name(); |
0 | 2415 |
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|
2416 return InstanceKlass::is_same_class_package(classloader1, classname1, |
0 | 2417 classloader2, classname2); |
2418 } | |
2419 | |
6725
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|
2420 bool InstanceKlass::is_same_class_package(oop classloader2, Symbol* classname2) { |
da91efe96a93
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|
2421 Klass* class1 = this; |
da91efe96a93
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|
2422 oop classloader1 = InstanceKlass::cast(class1)->class_loader(); |
6983 | 2423 Symbol* classname1 = class1->name(); |
0 | 2424 |
6725
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|
2425 return InstanceKlass::is_same_class_package(classloader1, classname1, |
0 | 2426 classloader2, classname2); |
2427 } | |
2428 | |
2429 // return true if two classes are in the same package, classloader | |
2430 // and classname information is enough to determine a class's package | |
6725
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|
2431 bool InstanceKlass::is_same_class_package(oop class_loader1, Symbol* class_name1, |
2177
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6990754: Use native memory and reference counting to implement SymbolTable
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diff
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|
2432 oop class_loader2, Symbol* class_name2) { |
0 | 2433 if (class_loader1 != class_loader2) { |
2434 return false; | |
665
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6814659: separable cleanups and subroutines for 6655638
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|
2435 } else if (class_name1 == class_name2) { |
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6814659: separable cleanups and subroutines for 6655638
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|
2436 return true; // skip painful bytewise comparison |
0 | 2437 } else { |
2438 ResourceMark rm; | |
2439 | |
2177
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diff
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|
2440 // The Symbol*'s are in UTF8 encoding. Since we only need to check explicitly |
0 | 2441 // for ASCII characters ('/', 'L', '['), we can keep them in UTF8 encoding. |
2442 // Otherwise, we just compare jbyte values between the strings. | |
2177
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|
2443 const jbyte *name1 = class_name1->base(); |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
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diff
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|
2444 const jbyte *name2 = class_name2->base(); |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
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diff
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|
2445 |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
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diff
changeset
|
2446 const jbyte *last_slash1 = UTF8::strrchr(name1, class_name1->utf8_length(), '/'); |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
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diff
changeset
|
2447 const jbyte *last_slash2 = UTF8::strrchr(name2, class_name2->utf8_length(), '/'); |
0 | 2448 |
2449 if ((last_slash1 == NULL) || (last_slash2 == NULL)) { | |
2450 // One of the two doesn't have a package. Only return true | |
2451 // if the other one also doesn't have a package. | |
2452 return last_slash1 == last_slash2; | |
2453 } else { | |
2454 // Skip over '['s | |
2455 if (*name1 == '[') { | |
2456 do { | |
2457 name1++; | |
2458 } while (*name1 == '['); | |
2459 if (*name1 != 'L') { | |
2460 // Something is terribly wrong. Shouldn't be here. | |
2461 return false; | |
2462 } | |
2463 } | |
2464 if (*name2 == '[') { | |
2465 do { | |
2466 name2++; | |
2467 } while (*name2 == '['); | |
2468 if (*name2 != 'L') { | |
2469 // Something is terribly wrong. Shouldn't be here. | |
2470 return false; | |
2471 } | |
2472 } | |
2473 | |
2474 // Check that package part is identical | |
2475 int length1 = last_slash1 - name1; | |
2476 int length2 = last_slash2 - name2; | |
2477 | |
2478 return UTF8::equal(name1, length1, name2, length2); | |
2479 } | |
2480 } | |
2481 } | |
2482 | |
652
4aaa9f5e02a8
4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
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diff
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|
2483 // Returns true iff super_method can be overridden by a method in targetclassname |
4aaa9f5e02a8
4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
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605
diff
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|
2484 // See JSL 3rd edition 8.4.6.1 |
4aaa9f5e02a8
4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
acorn
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diff
changeset
|
2485 // Assumes name-signature match |
6725
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|
2486 // "this" is InstanceKlass of super_method which must exist |
da91efe96a93
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coleenp
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|
2487 // note that the InstanceKlass of the method in the targetclassname has not always been created yet |
da91efe96a93
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|
2488 bool InstanceKlass::is_override(methodHandle super_method, Handle targetclassloader, Symbol* targetclassname, TRAPS) { |
652
4aaa9f5e02a8
4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
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diff
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|
2489 // Private methods can not be overridden |
4aaa9f5e02a8
4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
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diff
changeset
|
2490 if (super_method->is_private()) { |
4aaa9f5e02a8
4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
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diff
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|
2491 return false; |
4aaa9f5e02a8
4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
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diff
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|
2492 } |
4aaa9f5e02a8
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diff
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|
2493 // If super method is accessible, then override |
4aaa9f5e02a8
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diff
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|
2494 if ((super_method->is_protected()) || |
4aaa9f5e02a8
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diff
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|
2495 (super_method->is_public())) { |
4aaa9f5e02a8
4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
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605
diff
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|
2496 return true; |
4aaa9f5e02a8
4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
acorn
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diff
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|
2497 } |
4aaa9f5e02a8
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diff
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|
2498 // Package-private methods are not inherited outside of package |
4aaa9f5e02a8
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diff
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|
2499 assert(super_method->is_package_private(), "must be package private"); |
2177
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diff
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|
2500 return(is_same_class_package(targetclassloader(), targetclassname)); |
652
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4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
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|
2501 } |
0 | 2502 |
665
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6814659: separable cleanups and subroutines for 6655638
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|
2503 /* defined for now in jvm.cpp, for historical reasons *-- |
6725
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|
2504 Klass* InstanceKlass::compute_enclosing_class_impl(instanceKlassHandle self, |
2177
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6990754: Use native memory and reference counting to implement SymbolTable
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diff
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|
2505 Symbol*& simple_name_result, TRAPS) { |
665
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6814659: separable cleanups and subroutines for 6655638
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diff
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|
2506 ... |
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6814659: separable cleanups and subroutines for 6655638
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diff
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|
2507 } |
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6814659: separable cleanups and subroutines for 6655638
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|
2508 */ |
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6814659: separable cleanups and subroutines for 6655638
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|
2509 |
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6814659: separable cleanups and subroutines for 6655638
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diff
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|
2510 // tell if two classes have the same enclosing class (at package level) |
6725
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|
2511 bool InstanceKlass::is_same_package_member_impl(instanceKlassHandle class1, |
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|
2512 Klass* class2_oop, TRAPS) { |
da91efe96a93
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|
2513 if (class2_oop == class1()) return true; |
6983 | 2514 if (!class2_oop->oop_is_instance()) return false; |
665
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6814659: separable cleanups and subroutines for 6655638
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|
2515 instanceKlassHandle class2(THREAD, class2_oop); |
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6814659: separable cleanups and subroutines for 6655638
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|
2516 |
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2517 // must be in same package before we try anything else |
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2518 if (!class1->is_same_class_package(class2->class_loader(), class2->name())) |
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2519 return false; |
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|
2520 |
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2521 // As long as there is an outer1.getEnclosingClass, |
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2522 // shift the search outward. |
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|
2523 instanceKlassHandle outer1 = class1; |
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|
2524 for (;;) { |
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|
2525 // As we walk along, look for equalities between outer1 and class2. |
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2526 // Eventually, the walks will terminate as outer1 stops |
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|
2527 // at the top-level class around the original class. |
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2528 bool ignore_inner_is_member; |
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2529 Klass* next = outer1->compute_enclosing_class(&ignore_inner_is_member, |
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2530 CHECK_false); |
665
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2531 if (next == NULL) break; |
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2532 if (next == class2()) return true; |
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2533 outer1 = instanceKlassHandle(THREAD, next); |
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|
2534 } |
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|
2535 |
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2536 // Now do the same for class2. |
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2537 instanceKlassHandle outer2 = class2; |
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2538 for (;;) { |
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2539 bool ignore_inner_is_member; |
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2540 Klass* next = outer2->compute_enclosing_class(&ignore_inner_is_member, |
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2541 CHECK_false); |
665
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|
2542 if (next == NULL) break; |
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2543 // Might as well check the new outer against all available values. |
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2544 if (next == class1()) return true; |
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2545 if (next == outer1()) return true; |
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2546 outer2 = instanceKlassHandle(THREAD, next); |
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|
2547 } |
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2548 |
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2549 // If by this point we have not found an equality between the |
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2550 // two classes, we know they are in separate package members. |
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|
2551 return false; |
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|
2552 } |
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2553 |
0 | 2554 |
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2555 jint InstanceKlass::compute_modifier_flags(TRAPS) const { |
0 | 2556 jint access = access_flags().as_int(); |
2557 | |
2558 // But check if it happens to be member class. | |
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2559 instanceKlassHandle ik(THREAD, this); |
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2560 InnerClassesIterator iter(ik); |
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2561 for (; !iter.done(); iter.next()) { |
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2562 int ioff = iter.inner_class_info_index(); |
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2563 // Inner class attribute can be zero, skip it. |
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2564 // Strange but true: JVM spec. allows null inner class refs. |
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2565 if (ioff == 0) continue; |
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2566 |
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2567 // only look at classes that are already loaded |
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2568 // since we are looking for the flags for our self. |
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2569 Symbol* inner_name = ik->constants()->klass_name_at(ioff); |
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2570 if ((ik->name() == inner_name)) { |
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|
2571 // This is really a member class. |
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|
2572 access = iter.inner_access_flags(); |
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|
2573 break; |
0 | 2574 } |
2575 } | |
2576 // Remember to strip ACC_SUPER bit | |
2577 return (access & (~JVM_ACC_SUPER)) & JVM_ACC_WRITTEN_FLAGS; | |
2578 } | |
2579 | |
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2580 jint InstanceKlass::jvmti_class_status() const { |
0 | 2581 jint result = 0; |
2582 | |
2583 if (is_linked()) { | |
2584 result |= JVMTI_CLASS_STATUS_VERIFIED | JVMTI_CLASS_STATUS_PREPARED; | |
2585 } | |
2586 | |
2587 if (is_initialized()) { | |
2588 assert(is_linked(), "Class status is not consistent"); | |
2589 result |= JVMTI_CLASS_STATUS_INITIALIZED; | |
2590 } | |
2591 if (is_in_error_state()) { | |
2592 result |= JVMTI_CLASS_STATUS_ERROR; | |
2593 } | |
2594 return result; | |
2595 } | |
2596 | |
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2597 Method* InstanceKlass::method_at_itable(Klass* holder, int index, TRAPS) { |
0 | 2598 itableOffsetEntry* ioe = (itableOffsetEntry*)start_of_itable(); |
2599 int method_table_offset_in_words = ioe->offset()/wordSize; | |
2600 int nof_interfaces = (method_table_offset_in_words - itable_offset_in_words()) | |
2601 / itableOffsetEntry::size(); | |
2602 | |
2603 for (int cnt = 0 ; ; cnt ++, ioe ++) { | |
605 | 2604 // If the interface isn't implemented by the receiver class, |
0 | 2605 // the VM should throw IncompatibleClassChangeError. |
2606 if (cnt >= nof_interfaces) { | |
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2607 THROW_NULL(vmSymbols::java_lang_IncompatibleClassChangeError()); |
0 | 2608 } |
2609 | |
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2610 Klass* ik = ioe->interface_klass(); |
0 | 2611 if (ik == holder) break; |
2612 } | |
2613 | |
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2614 itableMethodEntry* ime = ioe->first_method_entry(this); |
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2615 Method* m = ime[index].method(); |
0 | 2616 if (m == NULL) { |
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2617 THROW_NULL(vmSymbols::java_lang_AbstractMethodError()); |
0 | 2618 } |
2619 return m; | |
2620 } | |
2621 | |
2622 // On-stack replacement stuff | |
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2623 void InstanceKlass::add_osr_nmethod(nmethod* n) { |
0 | 2624 // only one compilation can be active |
2625 NEEDS_CLEANUP | |
2626 // This is a short non-blocking critical region, so the no safepoint check is ok. | |
2627 OsrList_lock->lock_without_safepoint_check(); | |
2628 assert(n->is_osr_method(), "wrong kind of nmethod"); | |
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2629 n->set_osr_link(osr_nmethods_head()); |
0 | 2630 set_osr_nmethods_head(n); |
1783 | 2631 // Raise the highest osr level if necessary |
2632 if (TieredCompilation) { | |
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2633 Method* m = n->method(); |
1783 | 2634 m->set_highest_osr_comp_level(MAX2(m->highest_osr_comp_level(), n->comp_level())); |
2635 } | |
0 | 2636 // Remember to unlock again |
2637 OsrList_lock->unlock(); | |
1783 | 2638 |
2639 // Get rid of the osr methods for the same bci that have lower levels. | |
2640 if (TieredCompilation) { | |
2641 for (int l = CompLevel_limited_profile; l < n->comp_level(); l++) { | |
2642 nmethod *inv = lookup_osr_nmethod(n->method(), n->osr_entry_bci(), l, true); | |
2643 if (inv != NULL && inv->is_in_use()) { | |
2644 inv->make_not_entrant(); | |
2645 } | |
2646 } | |
2647 } | |
0 | 2648 } |
2649 | |
2650 | |
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2651 void InstanceKlass::remove_osr_nmethod(nmethod* n) { |
0 | 2652 // This is a short non-blocking critical region, so the no safepoint check is ok. |
2653 OsrList_lock->lock_without_safepoint_check(); | |
2654 assert(n->is_osr_method(), "wrong kind of nmethod"); | |
2655 nmethod* last = NULL; | |
2656 nmethod* cur = osr_nmethods_head(); | |
1783 | 2657 int max_level = CompLevel_none; // Find the max comp level excluding n |
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2658 Method* m = n->method(); |
0 | 2659 // Search for match |
2660 while(cur != NULL && cur != n) { | |
1783 | 2661 if (TieredCompilation) { |
2662 // Find max level before n | |
2663 max_level = MAX2(max_level, cur->comp_level()); | |
2664 } | |
0 | 2665 last = cur; |
989
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2666 cur = cur->osr_link(); |
0 | 2667 } |
1783 | 2668 nmethod* next = NULL; |
0 | 2669 if (cur == n) { |
1783 | 2670 next = cur->osr_link(); |
0 | 2671 if (last == NULL) { |
2672 // Remove first element | |
1783 | 2673 set_osr_nmethods_head(next); |
0 | 2674 } else { |
1783 | 2675 last->set_osr_link(next); |
0 | 2676 } |
2677 } | |
989
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2678 n->set_osr_link(NULL); |
1783 | 2679 if (TieredCompilation) { |
2680 cur = next; | |
2681 while (cur != NULL) { | |
2682 // Find max level after n | |
2683 max_level = MAX2(max_level, cur->comp_level()); | |
2684 cur = cur->osr_link(); | |
2685 } | |
2686 m->set_highest_osr_comp_level(max_level); | |
2687 } | |
0 | 2688 // Remember to unlock again |
2689 OsrList_lock->unlock(); | |
2690 } | |
2691 | |
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2692 nmethod* InstanceKlass::lookup_osr_nmethod(Method* const m, int bci, int comp_level, bool match_level) const { |
0 | 2693 // This is a short non-blocking critical region, so the no safepoint check is ok. |
2694 OsrList_lock->lock_without_safepoint_check(); | |
2695 nmethod* osr = osr_nmethods_head(); | |
1783 | 2696 nmethod* best = NULL; |
0 | 2697 while (osr != NULL) { |
2698 assert(osr->is_osr_method(), "wrong kind of nmethod found in chain"); | |
1783 | 2699 // There can be a time when a c1 osr method exists but we are waiting |
2700 // for a c2 version. When c2 completes its osr nmethod we will trash | |
2701 // the c1 version and only be able to find the c2 version. However | |
2702 // while we overflow in the c1 code at back branches we don't want to | |
2703 // try and switch to the same code as we are already running | |
2704 | |
0 | 2705 if (osr->method() == m && |
2706 (bci == InvocationEntryBci || osr->osr_entry_bci() == bci)) { | |
1783 | 2707 if (match_level) { |
2708 if (osr->comp_level() == comp_level) { | |
2709 // Found a match - return it. | |
2710 OsrList_lock->unlock(); | |
2711 return osr; | |
2712 } | |
2713 } else { | |
2714 if (best == NULL || (osr->comp_level() > best->comp_level())) { | |
2715 if (osr->comp_level() == CompLevel_highest_tier) { | |
2716 // Found the best possible - return it. | |
2717 OsrList_lock->unlock(); | |
2718 return osr; | |
2719 } | |
2720 best = osr; | |
2721 } | |
2722 } | |
0 | 2723 } |
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2724 osr = osr->osr_link(); |
0 | 2725 } |
2726 OsrList_lock->unlock(); | |
1783 | 2727 if (best != NULL && best->comp_level() >= comp_level && match_level == false) { |
2728 return best; | |
2729 } | |
0 | 2730 return NULL; |
2731 } | |
2732 | |
2733 // ----------------------------------------------------------------------------------------------------- | |
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2734 // Printing |
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2735 |
0 | 2736 #ifndef PRODUCT |
2737 | |
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|
2738 #define BULLET " - " |
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|
2739 |
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2740 static const char* state_names[] = { |
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2741 "allocated", "loaded", "linked", "being_initialized", "fully_initialized", "initialization_error" |
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2742 }; |
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2743 |
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2744 void InstanceKlass::print_on(outputStream* st) const { |
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2745 assert(is_klass(), "must be klass"); |
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2746 Klass::print_on(st); |
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2747 |
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2748 st->print(BULLET"instance size: %d", size_helper()); st->cr(); |
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2749 st->print(BULLET"klass size: %d", size()); st->cr(); |
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2750 st->print(BULLET"access: "); access_flags().print_on(st); st->cr(); |
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2751 st->print(BULLET"state: "); st->print_cr(state_names[_init_state]); |
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2752 st->print(BULLET"name: "); name()->print_value_on(st); st->cr(); |
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2753 st->print(BULLET"super: "); super()->print_value_on_maybe_null(st); st->cr(); |
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2754 st->print(BULLET"sub: "); |
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2755 Klass* sub = subklass(); |
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2756 int n; |
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2757 for (n = 0; sub != NULL; n++, sub = sub->next_sibling()) { |
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2758 if (n < MaxSubklassPrintSize) { |
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2759 sub->print_value_on(st); |
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2760 st->print(" "); |
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|
2761 } |
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|
2762 } |
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2763 if (n >= MaxSubklassPrintSize) st->print("(%d more klasses...)", n - MaxSubklassPrintSize); |
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2764 st->cr(); |
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|
2765 |
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2766 if (is_interface()) { |
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2767 st->print_cr(BULLET"nof implementors: %d", nof_implementors()); |
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2768 if (nof_implementors() == 1) { |
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2769 st->print_cr(BULLET"implementor: "); |
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2770 st->print(" "); |
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2771 implementor()->print_value_on(st); |
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2772 st->cr(); |
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|
2773 } |
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|
2774 } |
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|
2775 |
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2776 st->print(BULLET"arrays: "); array_klasses()->print_value_on_maybe_null(st); st->cr(); |
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2777 st->print(BULLET"methods: "); methods()->print_value_on(st); st->cr(); |
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2778 if (Verbose) { |
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2779 Array<Method*>* method_array = methods(); |
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2780 for(int i = 0; i < method_array->length(); i++) { |
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2781 st->print("%d : ", i); method_array->at(i)->print_value(); st->cr(); |
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2782 } |
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|
2783 } |
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2784 st->print(BULLET"method ordering: "); method_ordering()->print_value_on(st); st->cr(); |
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2785 st->print(BULLET"local interfaces: "); local_interfaces()->print_value_on(st); st->cr(); |
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2786 st->print(BULLET"trans. interfaces: "); transitive_interfaces()->print_value_on(st); st->cr(); |
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2787 st->print(BULLET"constants: "); constants()->print_value_on(st); st->cr(); |
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2788 if (class_loader_data() != NULL) { |
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2789 st->print(BULLET"class loader data: "); |
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2790 class_loader_data()->print_value_on(st); |
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2791 st->cr(); |
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|
2792 } |
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2793 st->print(BULLET"protection domain: "); ((InstanceKlass*)this)->protection_domain()->print_value_on(st); st->cr(); |
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2794 st->print(BULLET"host class: "); host_klass()->print_value_on_maybe_null(st); st->cr(); |
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2795 st->print(BULLET"signers: "); signers()->print_value_on(st); st->cr(); |
8712
3efdfd6ddbf2
8003553: NPG: metaspace objects should be zeroed in constructors
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|
2796 st->print(BULLET"init_lock: "); ((oop)_init_lock)->print_value_on(st); st->cr(); |
6725
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2797 if (source_file_name() != NULL) { |
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|
2798 st->print(BULLET"source file: "); |
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2799 source_file_name()->print_value_on(st); |
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2800 st->cr(); |
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|
2801 } |
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2802 if (source_debug_extension() != NULL) { |
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2803 st->print(BULLET"source debug extension: "); |
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2804 st->print("%s", source_debug_extension()); |
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|
2805 st->cr(); |
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2806 } |
8031 | 2807 st->print(BULLET"class annotations: "); class_annotations()->print_value_on(st); st->cr(); |
2808 st->print(BULLET"class type annotations: "); class_type_annotations()->print_value_on(st); st->cr(); | |
2809 st->print(BULLET"field annotations: "); fields_annotations()->print_value_on(st); st->cr(); | |
2810 st->print(BULLET"field type annotations: "); fields_type_annotations()->print_value_on(st); st->cr(); | |
6725
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2811 { |
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|
2812 ResourceMark rm; |
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|
2813 // PreviousVersionInfo objects returned via PreviousVersionWalker |
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2814 // contain a GrowableArray of handles. We have to clean up the |
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2815 // GrowableArray _after_ the PreviousVersionWalker destructor |
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2816 // has destroyed the handles. |
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2817 { |
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|
2818 bool have_pv = false; |
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|
2819 PreviousVersionWalker pvw((InstanceKlass*)this); |
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2820 for (PreviousVersionInfo * pv_info = pvw.next_previous_version(); |
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2821 pv_info != NULL; pv_info = pvw.next_previous_version()) { |
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|
2822 if (!have_pv) |
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|
2823 st->print(BULLET"previous version: "); |
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|
2824 have_pv = true; |
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|
2825 pv_info->prev_constant_pool_handle()()->print_value_on(st); |
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|
2826 } |
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|
2827 if (have_pv) st->cr(); |
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|
2828 } // pvw is cleaned up |
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|
2829 } // rm is cleaned up |
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|
2830 |
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|
2831 if (generic_signature() != NULL) { |
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|
2832 st->print(BULLET"generic signature: "); |
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|
2833 generic_signature()->print_value_on(st); |
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|
2834 st->cr(); |
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|
2835 } |
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|
2836 st->print(BULLET"inner classes: "); inner_classes()->print_value_on(st); st->cr(); |
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2837 st->print(BULLET"java mirror: "); java_mirror()->print_value_on(st); st->cr(); |
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2838 st->print(BULLET"vtable length %d (start addr: " INTPTR_FORMAT ")", vtable_length(), start_of_vtable()); st->cr(); |
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|
2839 st->print(BULLET"itable length %d (start addr: " INTPTR_FORMAT ")", itable_length(), start_of_itable()); st->cr(); |
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|
2840 st->print_cr(BULLET"---- static fields (%d words):", static_field_size()); |
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|
2841 FieldPrinter print_static_field(st); |
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|
2842 ((InstanceKlass*)this)->do_local_static_fields(&print_static_field); |
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2843 st->print_cr(BULLET"---- non-static fields (%d words):", nonstatic_field_size()); |
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|
2844 FieldPrinter print_nonstatic_field(st); |
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|
2845 ((InstanceKlass*)this)->do_nonstatic_fields(&print_nonstatic_field); |
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|
2846 |
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|
2847 st->print(BULLET"non-static oop maps: "); |
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|
2848 OopMapBlock* map = start_of_nonstatic_oop_maps(); |
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|
2849 OopMapBlock* end_map = map + nonstatic_oop_map_count(); |
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|
2850 while (map < end_map) { |
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|
2851 st->print("%d-%d ", map->offset(), map->offset() + heapOopSize*(map->count() - 1)); |
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|
2852 map++; |
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|
2853 } |
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|
2854 st->cr(); |
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|
2855 } |
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|
2856 |
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|
2857 #endif //PRODUCT |
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|
2858 |
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|
2859 void InstanceKlass::print_value_on(outputStream* st) const { |
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|
2860 assert(is_klass(), "must be klass"); |
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|
2861 name()->print_value_on(st); |
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|
2862 } |
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|
2863 |
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|
2864 #ifndef PRODUCT |
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|
2865 |
0 | 2866 void FieldPrinter::do_field(fieldDescriptor* fd) { |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
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|
2867 _st->print(BULLET); |
2376
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2357
diff
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|
2868 if (_obj == NULL) { |
0 | 2869 fd->print_on(_st); |
2870 _st->cr(); | |
2871 } else { | |
2872 fd->print_on_for(_st, _obj); | |
2873 _st->cr(); | |
2874 } | |
2875 } | |
2876 | |
2877 | |
6725
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|
2878 void InstanceKlass::oop_print_on(oop obj, outputStream* st) { |
0 | 2879 Klass::oop_print_on(obj, st); |
2880 | |
6725
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|
2881 if (this == SystemDictionary::String_klass()) { |
0 | 2882 typeArrayOop value = java_lang_String::value(obj); |
2883 juint offset = java_lang_String::offset(obj); | |
2884 juint length = java_lang_String::length(obj); | |
2885 if (value != NULL && | |
2886 value->is_typeArray() && | |
2887 offset <= (juint) value->length() && | |
2888 offset + length <= (juint) value->length()) { | |
665
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6814659: separable cleanups and subroutines for 6655638
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parents:
605
diff
changeset
|
2889 st->print(BULLET"string: "); |
0 | 2890 Handle h_obj(obj); |
2891 java_lang_String::print(h_obj, st); | |
2892 st->cr(); | |
2893 if (!WizardMode) return; // that is enough | |
2894 } | |
2895 } | |
2896 | |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2897 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
|
2898 FieldPrinter print_field(st, obj); |
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2357
diff
changeset
|
2899 do_nonstatic_fields(&print_field); |
0 | 2900 |
6725
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
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diff
changeset
|
2901 if (this == SystemDictionary::Class_klass()) { |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2902 st->print(BULLET"signature: "); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
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diff
changeset
|
2903 java_lang_Class::print_signature(obj, st); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
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diff
changeset
|
2904 st->cr(); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
2905 Klass* mirrored_klass = java_lang_Class::as_Klass(obj); |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2906 st->print(BULLET"fake entry for mirror: "); |
6725
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diff
changeset
|
2907 mirrored_klass->print_value_on_maybe_null(st); |
0 | 2908 st->cr(); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
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diff
changeset
|
2909 Klass* array_klass = java_lang_Class::array_klass(obj); |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2910 st->print(BULLET"fake entry for array: "); |
6725
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
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diff
changeset
|
2911 array_klass->print_value_on_maybe_null(st); |
0 | 2912 st->cr(); |
2376
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2357
diff
changeset
|
2913 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
|
2914 st->print_cr(BULLET"fake entry for static_oop_field_count: %d", java_lang_Class::static_oop_field_count(obj)); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
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changeset
|
2915 Klass* real_klass = java_lang_Class::as_Klass(obj); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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changeset
|
2916 if (real_klass != NULL && real_klass->oop_is_instance()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
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changeset
|
2917 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
|
2918 } |
6725
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6964458: Reimplement class meta-data storage to use native memory
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|
2919 } else if (this == SystemDictionary::MethodType_klass()) { |
1039
987e948ebbc8
6815692: method handle code needs some cleanup (post-6655638)
jrose
parents:
997
diff
changeset
|
2920 st->print(BULLET"signature: "); |
2357
8033953d67ff
7012648: move JSR 292 to package java.lang.invoke and adjust names
jrose
parents:
2334
diff
changeset
|
2921 java_lang_invoke_MethodType::print_signature(obj, st); |
1039
987e948ebbc8
6815692: method handle code needs some cleanup (post-6655638)
jrose
parents:
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diff
changeset
|
2922 st->cr(); |
0 | 2923 } |
2924 } | |
2925 | |
1155
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1144
diff
changeset
|
2926 #endif //PRODUCT |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1144
diff
changeset
|
2927 |
6725
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6964458: Reimplement class meta-data storage to use native memory
coleenp
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|
2928 void InstanceKlass::oop_print_value_on(oop obj, outputStream* st) { |
0 | 2929 st->print("a "); |
2930 name()->print_value_on(st); | |
2931 obj->print_address_on(st); | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
2932 if (this == SystemDictionary::String_klass() |
665
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6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2933 && java_lang_String::value(obj) != NULL) { |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2934 ResourceMark rm; |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
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diff
changeset
|
2935 int len = java_lang_String::length(obj); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2936 int plen = (len < 24 ? len : 12); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2937 char* str = java_lang_String::as_utf8_string(obj, 0, plen); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2938 st->print(" = \"%s\"", str); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2939 if (len > plen) |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2940 st->print("...[%d]", len); |
6725
da91efe96a93
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coleenp
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diff
changeset
|
2941 } else if (this == SystemDictionary::Class_klass()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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changeset
|
2942 Klass* k = java_lang_Class::as_Klass(obj); |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2943 st->print(" = "); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2944 if (k != NULL) { |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2945 k->print_value_on(st); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2946 } else { |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
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diff
changeset
|
2947 const char* tname = type2name(java_lang_Class::primitive_type(obj)); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
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diff
changeset
|
2948 st->print("%s", tname ? tname : "type?"); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2949 } |
6725
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|
2950 } else if (this == SystemDictionary::MethodType_klass()) { |
1039
987e948ebbc8
6815692: method handle code needs some cleanup (post-6655638)
jrose
parents:
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diff
changeset
|
2951 st->print(" = "); |
2357
8033953d67ff
7012648: move JSR 292 to package java.lang.invoke and adjust names
jrose
parents:
2334
diff
changeset
|
2952 java_lang_invoke_MethodType::print_signature(obj, st); |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2953 } else if (java_lang_boxing_object::is_instance(obj)) { |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
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diff
changeset
|
2954 st->print(" = "); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
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diff
changeset
|
2955 java_lang_boxing_object::print(obj, st); |
6725
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6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
2956 } else if (this == SystemDictionary::LambdaForm_klass()) { |
6266
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
2957 oop vmentry = java_lang_invoke_LambdaForm::vmentry(obj); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
2958 if (vmentry != NULL) { |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
2959 st->print(" => "); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
2960 vmentry->print_value_on(st); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
2961 } |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
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|
2962 } else if (this == SystemDictionary::MemberName_klass()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
2963 Metadata* vmtarget = java_lang_invoke_MemberName::vmtarget(obj); |
6266
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
2964 if (vmtarget != NULL) { |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
2965 st->print(" = "); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
2966 vmtarget->print_value_on(st); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
2967 } else { |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
2968 java_lang_invoke_MemberName::clazz(obj)->print_value_on(st); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
2969 st->print("."); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
2970 java_lang_invoke_MemberName::name(obj)->print_value_on(st); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
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|
2971 } |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
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diff
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|
2972 } |
0 | 2973 } |
2974 | |
6725
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coleenp
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|
2975 const char* InstanceKlass::internal_name() const { |
0 | 2976 return external_name(); |
2977 } | |
2978 | |
7956 | 2979 #if INCLUDE_SERVICES |
2980 // Size Statistics | |
2981 void InstanceKlass::collect_statistics(KlassSizeStats *sz) const { | |
2982 Klass::collect_statistics(sz); | |
2983 | |
2984 sz->_inst_size = HeapWordSize * size_helper(); | |
2985 sz->_vtab_bytes = HeapWordSize * align_object_offset(vtable_length()); | |
2986 sz->_itab_bytes = HeapWordSize * align_object_offset(itable_length()); | |
2987 sz->_nonstatic_oopmap_bytes = HeapWordSize * | |
2988 ((is_interface() || is_anonymous()) ? | |
2989 align_object_offset(nonstatic_oop_map_size()) : | |
2990 nonstatic_oop_map_size()); | |
2991 | |
2992 int n = 0; | |
2993 n += (sz->_methods_array_bytes = sz->count_array(methods())); | |
2994 n += (sz->_method_ordering_bytes = sz->count_array(method_ordering())); | |
2995 n += (sz->_local_interfaces_bytes = sz->count_array(local_interfaces())); | |
2996 n += (sz->_transitive_interfaces_bytes = sz->count_array(transitive_interfaces())); | |
2997 n += (sz->_signers_bytes = sz->count_array(signers())); | |
2998 n += (sz->_fields_bytes = sz->count_array(fields())); | |
2999 n += (sz->_inner_classes_bytes = sz->count_array(inner_classes())); | |
3000 sz->_ro_bytes += n; | |
3001 | |
3002 const ConstantPool* cp = constants(); | |
3003 if (cp) { | |
3004 cp->collect_statistics(sz); | |
3005 } | |
3006 | |
3007 const Annotations* anno = annotations(); | |
3008 if (anno) { | |
3009 anno->collect_statistics(sz); | |
3010 } | |
3011 | |
3012 const Array<Method*>* methods_array = methods(); | |
3013 if (methods()) { | |
3014 for (int i = 0; i < methods_array->length(); i++) { | |
3015 Method* method = methods_array->at(i); | |
3016 if (method) { | |
3017 sz->_method_count ++; | |
3018 method->collect_statistics(sz); | |
3019 } | |
3020 } | |
3021 } | |
3022 } | |
3023 #endif // INCLUDE_SERVICES | |
3024 | |
0 | 3025 // Verification |
3026 | |
3027 class VerifyFieldClosure: public OopClosure { | |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
52
diff
changeset
|
3028 protected: |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
52
diff
changeset
|
3029 template <class T> void do_oop_work(T* p) { |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
52
diff
changeset
|
3030 oop obj = oopDesc::load_decode_heap_oop(p); |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
52
diff
changeset
|
3031 if (!obj->is_oop_or_null()) { |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
52
diff
changeset
|
3032 tty->print_cr("Failed: " PTR_FORMAT " -> " PTR_FORMAT, p, (address)obj); |
0 | 3033 Universe::print(); |
3034 guarantee(false, "boom"); | |
3035 } | |
3036 } | |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
52
diff
changeset
|
3037 public: |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
52
diff
changeset
|
3038 virtual void do_oop(oop* p) { VerifyFieldClosure::do_oop_work(p); } |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
52
diff
changeset
|
3039 virtual void do_oop(narrowOop* p) { VerifyFieldClosure::do_oop_work(p); } |
0 | 3040 }; |
3041 | |
6725
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6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
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|
3042 void InstanceKlass::verify_on(outputStream* st) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
3043 Klass::verify_on(st); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
3044 Thread *thread = Thread::current(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
3045 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
3046 #ifndef PRODUCT |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
3047 // Avoid redundant verifies |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
3048 if (_verify_count == Universe::verify_count()) return; |
da91efe96a93
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coleenp
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6266
diff
changeset
|
3049 _verify_count = Universe::verify_count(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
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|
3050 #endif |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
3051 // Verify that klass is present in SystemDictionary |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
3052 if (is_loaded() && !is_anonymous()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
3053 Symbol* h_name = name(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
3054 SystemDictionary::verify_obj_klass_present(h_name, class_loader_data()); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
3055 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
3056 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
3057 // Verify static fields |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
3058 VerifyFieldClosure blk; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
3059 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
3060 // Verify vtables |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
3061 if (is_linked()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
3062 ResourceMark rm(thread); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
3063 // $$$ This used to be done only for m/s collections. Doing it |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
3064 // always seemed a valid generalization. (DLD -- 6/00) |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
3065 vtable()->verify(st); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
3066 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
3067 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
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|
3068 // Verify first subklass |
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3069 if (subklass_oop() != NULL) { |
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3070 guarantee(subklass_oop()->is_metadata(), "should be in metaspace"); |
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3071 guarantee(subklass_oop()->is_klass(), "should be klass"); |
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3072 } |
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|
3073 |
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3074 // Verify siblings |
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3075 Klass* super = this->super(); |
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3076 Klass* sib = next_sibling(); |
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3077 if (sib != NULL) { |
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3078 if (sib == this) { |
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3079 fatal(err_msg("subclass points to itself " PTR_FORMAT, sib)); |
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3080 } |
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|
3081 |
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3082 guarantee(sib->is_metadata(), "should be in metaspace"); |
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3083 guarantee(sib->is_klass(), "should be klass"); |
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3084 guarantee(sib->super() == super, "siblings should have same superklass"); |
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|
3085 } |
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|
3086 |
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3087 // Verify implementor fields |
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|
3088 Klass* im = implementor(); |
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|
3089 if (im != NULL) { |
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3090 guarantee(is_interface(), "only interfaces should have implementor set"); |
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3091 guarantee(im->is_klass(), "should be klass"); |
6983 | 3092 guarantee(!im->is_interface() || im == this, |
6725
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3093 "implementors cannot be interfaces"); |
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|
3094 } |
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|
3095 |
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3096 // Verify local interfaces |
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3097 if (local_interfaces()) { |
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3098 Array<Klass*>* local_interfaces = this->local_interfaces(); |
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3099 for (int j = 0; j < local_interfaces->length(); j++) { |
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3100 Klass* e = local_interfaces->at(j); |
6983 | 3101 guarantee(e->is_klass() && e->is_interface(), "invalid local interface"); |
6725
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3102 } |
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|
3103 } |
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|
3104 |
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3105 // Verify transitive interfaces |
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3106 if (transitive_interfaces() != NULL) { |
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3107 Array<Klass*>* transitive_interfaces = this->transitive_interfaces(); |
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3108 for (int j = 0; j < transitive_interfaces->length(); j++) { |
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3109 Klass* e = transitive_interfaces->at(j); |
6983 | 3110 guarantee(e->is_klass() && e->is_interface(), "invalid transitive interface"); |
6725
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|
3111 } |
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|
3112 } |
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|
3113 |
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3114 // Verify methods |
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3115 if (methods() != NULL) { |
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3116 Array<Method*>* methods = this->methods(); |
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3117 for (int j = 0; j < methods->length(); j++) { |
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3118 guarantee(methods->at(j)->is_metadata(), "should be in metaspace"); |
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3119 guarantee(methods->at(j)->is_method(), "non-method in methods array"); |
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|
3120 } |
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|
3121 for (int j = 0; j < methods->length() - 1; j++) { |
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3122 Method* m1 = methods->at(j); |
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3123 Method* m2 = methods->at(j + 1); |
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3124 guarantee(m1->name()->fast_compare(m2->name()) <= 0, "methods not sorted correctly"); |
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|
3125 } |
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|
3126 } |
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|
3127 |
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3128 // Verify method ordering |
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|
3129 if (method_ordering() != NULL) { |
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3130 Array<int>* method_ordering = this->method_ordering(); |
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3131 int length = method_ordering->length(); |
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3132 if (JvmtiExport::can_maintain_original_method_order() || |
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|
3133 (UseSharedSpaces && length != 0)) { |
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|
3134 guarantee(length == methods()->length(), "invalid method ordering length"); |
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|
3135 jlong sum = 0; |
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|
3136 for (int j = 0; j < length; j++) { |
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|
3137 int original_index = method_ordering->at(j); |
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|
3138 guarantee(original_index >= 0, "invalid method ordering index"); |
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|
3139 guarantee(original_index < length, "invalid method ordering index"); |
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|
3140 sum += original_index; |
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|
3141 } |
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|
3142 // Verify sum of indices 0,1,...,length-1 |
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|
3143 guarantee(sum == ((jlong)length*(length-1))/2, "invalid method ordering sum"); |
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|
3144 } else { |
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|
3145 guarantee(length == 0, "invalid method ordering length"); |
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|
3146 } |
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|
3147 } |
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|
3148 |
da91efe96a93
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|
3149 // Verify JNI static field identifiers |
da91efe96a93
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|
3150 if (jni_ids() != NULL) { |
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|
3151 jni_ids()->verify(this); |
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|
3152 } |
da91efe96a93
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|
3153 |
da91efe96a93
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|
3154 // Verify other fields |
da91efe96a93
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|
3155 if (array_klasses() != NULL) { |
da91efe96a93
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|
3156 guarantee(array_klasses()->is_metadata(), "should be in metaspace"); |
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|
3157 guarantee(array_klasses()->is_klass(), "should be klass"); |
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|
3158 } |
da91efe96a93
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|
3159 if (constants() != NULL) { |
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|
3160 guarantee(constants()->is_metadata(), "should be in metaspace"); |
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|
3161 guarantee(constants()->is_constantPool(), "should be constant pool"); |
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|
3162 } |
da91efe96a93
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|
3163 if (protection_domain() != NULL) { |
da91efe96a93
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|
3164 guarantee(protection_domain()->is_oop(), "should be oop"); |
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|
3165 } |
8693
872b3feace55
8008750: [partfait] Null pointer deference in hotspot/src/share/vm/oops/instanceKlass.hpp
morris
parents:
8031
diff
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|
3166 const Klass* host = host_klass(); |
872b3feace55
8008750: [partfait] Null pointer deference in hotspot/src/share/vm/oops/instanceKlass.hpp
morris
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|
3167 if (host != NULL) { |
872b3feace55
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morris
parents:
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diff
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|
3168 guarantee(host->is_metadata(), "should be in metaspace"); |
872b3feace55
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morris
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|
3169 guarantee(host->is_klass(), "should be klass"); |
6725
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|
3170 } |
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|
3171 if (signers() != NULL) { |
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|
3172 guarantee(signers()->is_objArray(), "should be obj array"); |
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|
3173 } |
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|
3174 } |
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|
3175 |
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|
3176 void InstanceKlass::oop_verify_on(oop obj, outputStream* st) { |
0 | 3177 Klass::oop_verify_on(obj, st); |
3178 VerifyFieldClosure blk; | |
6725
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|
3179 obj->oop_iterate_no_header(&blk); |
0 | 3180 } |
3181 | |
6725
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|
3182 |
113
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|
3183 // JNIid class for jfieldIDs only |
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|
3184 // Note to reviewers: |
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|
3185 // These JNI functions are just moved over to column 1 and not changed |
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|
3186 // in the compressed oops workspace. |
6725
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|
3187 JNIid::JNIid(Klass* holder, int offset, JNIid* next) { |
113
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|
3188 _holder = holder; |
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|
3189 _offset = offset; |
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|
3190 _next = next; |
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|
3191 debug_only(_is_static_field_id = false;) |
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|
3192 } |
0 | 3193 |
3194 | |
113
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|
3195 JNIid* JNIid::find(int offset) { |
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|
3196 JNIid* current = this; |
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|
3197 while (current != NULL) { |
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|
3198 if (current->offset() == offset) return current; |
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3199 current = current->next(); |
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3200 } |
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|
3201 return NULL; |
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3202 } |
0 | 3203 |
3204 void JNIid::deallocate(JNIid* current) { | |
113
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3205 while (current != NULL) { |
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3206 JNIid* next = current->next(); |
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3207 delete current; |
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3208 current = next; |
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3209 } |
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3210 } |
0 | 3211 |
3212 | |
6725
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3213 void JNIid::verify(Klass* holder) { |
6735
aed758eda82a
7195833: NPG: Rename instanceClassLoaderKlass, instanceRefKlass and instanceMirrorKlass
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3214 int first_field_offset = InstanceMirrorKlass::offset_of_static_fields(); |
113
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3215 int end_field_offset; |
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3216 end_field_offset = first_field_offset + (InstanceKlass::cast(holder)->static_field_size() * wordSize); |
0 | 3217 |
113
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3218 JNIid* current = this; |
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3219 while (current != NULL) { |
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3220 guarantee(current->holder() == holder, "Invalid klass in JNIid"); |
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3221 #ifdef ASSERT |
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3222 int o = current->offset(); |
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3223 if (current->is_static_field_id()) { |
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3224 guarantee(o >= first_field_offset && o < end_field_offset, "Invalid static field offset in JNIid"); |
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3225 } |
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|
3226 #endif |
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3227 current = current->next(); |
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3228 } |
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3229 } |
0 | 3230 |
3231 | |
3232 #ifdef ASSERT | |
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3233 void InstanceKlass::set_init_state(ClassState state) { |
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3234 bool good_state = is_shared() ? (_init_state <= state) |
113
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3235 : (_init_state < state); |
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3236 assert(good_state || state == allocated, "illegal state transition"); |
4739
52b5d32fbfaf
7117052: instanceKlass::_init_state can be u1 type
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3237 _init_state = (u1)state; |
113
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3238 } |
0 | 3239 #endif |
3240 | |
3241 | |
3242 // RedefineClasses() support for previous versions: | |
3243 | |
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3244 // Purge previous versions |
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3245 static void purge_previous_versions_internal(InstanceKlass* ik, int emcp_method_count) { |
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3246 if (ik->previous_versions() != NULL) { |
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3247 // This klass has previous versions so see what we can cleanup |
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3248 // while it is safe to do so. |
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3249 |
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3250 int deleted_count = 0; // leave debugging breadcrumbs |
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3251 int live_count = 0; |
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3252 ClassLoaderData* loader_data = ik->class_loader_data() == NULL ? |
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3253 ClassLoaderData::the_null_class_loader_data() : |
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3254 ik->class_loader_data(); |
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3255 |
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3256 // RC_TRACE macro has an embedded ResourceMark |
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3257 RC_TRACE(0x00000200, ("purge: %s: previous version length=%d", |
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3258 ik->external_name(), ik->previous_versions()->length())); |
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3259 |
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3260 for (int i = ik->previous_versions()->length() - 1; i >= 0; i--) { |
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3261 // check the previous versions array |
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3262 PreviousVersionNode * pv_node = ik->previous_versions()->at(i); |
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3263 ConstantPool* cp_ref = pv_node->prev_constant_pool(); |
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3264 assert(cp_ref != NULL, "cp ref was unexpectedly cleared"); |
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3265 |
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3266 ConstantPool* pvcp = cp_ref; |
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3267 if (!pvcp->on_stack()) { |
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3268 // If the constant pool isn't on stack, none of the methods |
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3269 // are executing. Delete all the methods, the constant pool and |
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3270 // and this previous version node. |
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3271 GrowableArray<Method*>* method_refs = pv_node->prev_EMCP_methods(); |
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3272 if (method_refs != NULL) { |
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3273 for (int j = method_refs->length() - 1; j >= 0; j--) { |
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3274 Method* method = method_refs->at(j); |
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3275 assert(method != NULL, "method ref was unexpectedly cleared"); |
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3276 method_refs->remove_at(j); |
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3277 // method will be freed with associated class. |
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|
3278 } |
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|
3279 } |
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|
3280 // Remove the constant pool |
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|
3281 delete pv_node; |
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|
3282 // Since we are traversing the array backwards, we don't have to |
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3283 // do anything special with the index. |
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|
3284 ik->previous_versions()->remove_at(i); |
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|
3285 deleted_count++; |
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|
3286 continue; |
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3287 } else { |
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3288 RC_TRACE(0x00000200, ("purge: previous version @%d is alive", i)); |
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3289 assert(pvcp->pool_holder() != NULL, "Constant pool with no holder"); |
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3290 guarantee (!loader_data->is_unloading(), "unloaded classes can't be on the stack"); |
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|
3291 live_count++; |
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|
3292 } |
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|
3293 |
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3294 // At least one method is live in this previous version, clean out |
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3295 // the others or mark them as obsolete. |
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3296 GrowableArray<Method*>* method_refs = pv_node->prev_EMCP_methods(); |
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3297 if (method_refs != NULL) { |
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3298 RC_TRACE(0x00000200, ("purge: previous methods length=%d", |
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3299 method_refs->length())); |
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3300 for (int j = method_refs->length() - 1; j >= 0; j--) { |
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3301 Method* method = method_refs->at(j); |
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3302 assert(method != NULL, "method ref was unexpectedly cleared"); |
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|
3303 |
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|
3304 // Remove the emcp method if it's not executing |
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3305 // If it's been made obsolete by a redefinition of a non-emcp |
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3306 // method, mark it as obsolete but leave it to clean up later. |
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3307 if (!method->on_stack()) { |
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3308 method_refs->remove_at(j); |
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3309 } else if (emcp_method_count == 0) { |
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3310 method->set_is_obsolete(); |
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3311 } else { |
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3312 // RC_TRACE macro has an embedded ResourceMark |
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3313 RC_TRACE(0x00000200, |
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3314 ("purge: %s(%s): prev method @%d in version @%d is alive", |
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3315 method->name()->as_C_string(), |
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3316 method->signature()->as_C_string(), j, i)); |
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|
3317 } |
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|
3318 } |
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|
3319 } |
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|
3320 } |
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3321 assert(ik->previous_versions()->length() == live_count, "sanity check"); |
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|
3322 RC_TRACE(0x00000200, |
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3323 ("purge: previous version stats: live=%d, deleted=%d", live_count, |
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|
3324 deleted_count)); |
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|
3325 } |
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|
3326 } |
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|
3327 |
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3328 // External interface for use during class unloading. |
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3329 void InstanceKlass::purge_previous_versions(InstanceKlass* ik) { |
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3330 // Call with >0 emcp methods since they are not currently being redefined. |
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3331 purge_previous_versions_internal(ik, 1); |
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3332 } |
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3333 |
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3334 |
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3335 // Potentially add an information node that contains pointers to the |
0 | 3336 // interesting parts of the previous version of the_class. |
6725
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3337 // This is also where we clean out any unused references. |
977
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3338 // Note that while we delete nodes from the _previous_versions |
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3339 // array, we never delete the array itself until the klass is |
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3340 // unloaded. The has_been_redefined() query depends on that fact. |
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3341 // |
6725
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3342 void InstanceKlass::add_previous_version(instanceKlassHandle ikh, |
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3343 BitMap* emcp_methods, int emcp_method_count) { |
0 | 3344 assert(Thread::current()->is_VM_thread(), |
113
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3345 "only VMThread can add previous versions"); |
0 | 3346 |
3347 if (_previous_versions == NULL) { | |
3348 // This is the first previous version so make some space. | |
3349 // Start with 2 elements under the assumption that the class | |
3350 // won't be redefined much. | |
6197 | 3351 _previous_versions = new (ResourceObj::C_HEAP, mtClass) |
0 | 3352 GrowableArray<PreviousVersionNode *>(2, true); |
3353 } | |
3354 | |
6725
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3355 ConstantPool* cp_ref = ikh->constants(); |
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3356 |
0 | 3357 // RC_TRACE macro has an embedded ResourceMark |
6725
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3358 RC_TRACE(0x00000400, ("adding previous version ref for %s @%d, EMCP_cnt=%d " |
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3359 "on_stack=%d", |
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3360 ikh->external_name(), _previous_versions->length(), emcp_method_count, |
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3361 cp_ref->on_stack())); |
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3362 |
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3363 // If the constant pool for this previous version of the class |
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3364 // is not marked as being on the stack, then none of the methods |
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3365 // in this previous version of the class are on the stack so |
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3366 // we don't need to create a new PreviousVersionNode. However, |
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3367 // we still need to examine older previous versions below. |
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3368 Array<Method*>* old_methods = ikh->methods(); |
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3369 |
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3370 if (cp_ref->on_stack()) { |
0 | 3371 PreviousVersionNode * pv_node = NULL; |
3372 if (emcp_method_count == 0) { | |
6725
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3373 // non-shared ConstantPool gets a reference |
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3374 pv_node = new PreviousVersionNode(cp_ref, !cp_ref->is_shared(), NULL); |
0 | 3375 RC_TRACE(0x00000400, |
6725
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3376 ("add: all methods are obsolete; flushing any EMCP refs")); |
0 | 3377 } else { |
3378 int local_count = 0; | |
6725
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3379 GrowableArray<Method*>* method_refs = new (ResourceObj::C_HEAP, mtClass) |
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3380 GrowableArray<Method*>(emcp_method_count, true); |
0 | 3381 for (int i = 0; i < old_methods->length(); i++) { |
3382 if (emcp_methods->at(i)) { | |
6725
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3383 // this old method is EMCP. Save it only if it's on the stack |
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3384 Method* old_method = old_methods->at(i); |
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3385 if (old_method->on_stack()) { |
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3386 method_refs->append(old_method); |
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3387 } |
0 | 3388 if (++local_count >= emcp_method_count) { |
3389 // no more EMCP methods so bail out now | |
3390 break; | |
3391 } | |
3392 } | |
3393 } | |
6725
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3394 // non-shared ConstantPool gets a reference |
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3395 pv_node = new PreviousVersionNode(cp_ref, !cp_ref->is_shared(), method_refs); |
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3396 } |
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3397 // append new previous version. |
0 | 3398 _previous_versions->append(pv_node); |
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3399 } |
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3400 |
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3401 // Since the caller is the VMThread and we are at a safepoint, this |
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3402 // is a good time to clear out unused references. |
0 | 3403 |
3404 RC_TRACE(0x00000400, ("add: previous version length=%d", | |
3405 _previous_versions->length())); | |
3406 | |
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3407 // Purge previous versions not executing on the stack |
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3408 purge_previous_versions_internal(this, emcp_method_count); |
0 | 3409 |
3410 int obsolete_method_count = old_methods->length() - emcp_method_count; | |
3411 | |
3412 if (emcp_method_count != 0 && obsolete_method_count != 0 && | |
6725
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3413 _previous_versions->length() > 0) { |
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3414 // We have a mix of obsolete and EMCP methods so we have to |
0 | 3415 // clear out any matching EMCP method entries the hard way. |
3416 int local_count = 0; | |
3417 for (int i = 0; i < old_methods->length(); i++) { | |
3418 if (!emcp_methods->at(i)) { | |
3419 // only obsolete methods are interesting | |
6725
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3420 Method* old_method = old_methods->at(i); |
2177
3582bf76420e
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|
3421 Symbol* m_name = old_method->name(); |
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3422 Symbol* m_signature = old_method->signature(); |
0 | 3423 |
6725
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3424 // we might not have added the last entry |
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3425 for (int j = _previous_versions->length() - 1; j >= 0; j--) { |
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3426 // check the previous versions array for non executing obsolete methods |
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3427 PreviousVersionNode * pv_node = _previous_versions->at(j); |
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3428 |
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3429 GrowableArray<Method*>* method_refs = pv_node->prev_EMCP_methods(); |
0 | 3430 if (method_refs == NULL) { |
3431 // We have run into a PreviousVersion generation where | |
3432 // all methods were made obsolete during that generation's | |
3433 // RedefineClasses() operation. At the time of that | |
3434 // operation, all EMCP methods were flushed so we don't | |
3435 // have to go back any further. | |
3436 // | |
3437 // A NULL method_refs is different than an empty method_refs. | |
3438 // We cannot infer any optimizations about older generations | |
3439 // from an empty method_refs for the current generation. | |
3440 break; | |
3441 } | |
3442 | |
3443 for (int k = method_refs->length() - 1; k >= 0; k--) { | |
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3444 Method* method = method_refs->at(k); |
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3445 |
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3446 if (!method->is_obsolete() && |
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3447 method->name() == m_name && |
0 | 3448 method->signature() == m_signature) { |
3449 // The current RedefineClasses() call has made all EMCP | |
3450 // versions of this method obsolete so mark it as obsolete | |
6725
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3451 // and remove the reference. |
0 | 3452 RC_TRACE(0x00000400, |
3453 ("add: %s(%s): flush obsolete method @%d in version @%d", | |
3454 m_name->as_C_string(), m_signature->as_C_string(), k, j)); | |
3455 | |
3456 method->set_is_obsolete(); | |
6725
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3457 // Leave obsolete methods on the previous version list to |
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|
3458 // clean up later. |
0 | 3459 break; |
3460 } | |
3461 } | |
3462 | |
3463 // The previous loop may not find a matching EMCP method, but | |
3464 // that doesn't mean that we can optimize and not go any | |
3465 // further back in the PreviousVersion generations. The EMCP | |
6725
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3466 // method for this generation could have already been deleted, |
0 | 3467 // but there still may be an older EMCP method that has not |
6725
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3468 // been deleted. |
0 | 3469 } |
3470 | |
3471 if (++local_count >= obsolete_method_count) { | |
3472 // no more obsolete methods so bail out now | |
3473 break; | |
3474 } | |
3475 } | |
3476 } | |
3477 } | |
3478 } // end add_previous_version() | |
3479 | |
3480 | |
6725
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3481 // Determine if InstanceKlass has a previous version. |
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3482 bool InstanceKlass::has_previous_version() const { |
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3483 return (_previous_versions != NULL && _previous_versions->length() > 0); |
0 | 3484 } // end has_previous_version() |
3485 | |
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3486 |
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3487 Method* InstanceKlass::method_with_idnum(int idnum) { |
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3488 Method* m = NULL; |
0 | 3489 if (idnum < methods()->length()) { |
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3490 m = methods()->at(idnum); |
0 | 3491 } |
3492 if (m == NULL || m->method_idnum() != idnum) { | |
3493 for (int index = 0; index < methods()->length(); ++index) { | |
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3494 m = methods()->at(index); |
0 | 3495 if (m->method_idnum() == idnum) { |
3496 return m; | |
3497 } | |
3498 } | |
3499 } | |
3500 return m; | |
3501 } | |
3502 | |
3503 | |
3504 // Construct a PreviousVersionNode entry for the array hung off | |
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3505 // the InstanceKlass. |
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3506 PreviousVersionNode::PreviousVersionNode(ConstantPool* prev_constant_pool, |
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3507 bool prev_cp_is_weak, GrowableArray<Method*>* prev_EMCP_methods) { |
0 | 3508 |
3509 _prev_constant_pool = prev_constant_pool; | |
47
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|
3510 _prev_cp_is_weak = prev_cp_is_weak; |
0 | 3511 _prev_EMCP_methods = prev_EMCP_methods; |
3512 } | |
3513 | |
3514 | |
3515 // Destroy a PreviousVersionNode | |
3516 PreviousVersionNode::~PreviousVersionNode() { | |
3517 if (_prev_constant_pool != NULL) { | |
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3518 _prev_constant_pool = NULL; |
0 | 3519 } |
3520 | |
3521 if (_prev_EMCP_methods != NULL) { | |
3522 delete _prev_EMCP_methods; | |
3523 } | |
3524 } | |
3525 | |
3526 | |
3527 // Construct a PreviousVersionInfo entry | |
3528 PreviousVersionInfo::PreviousVersionInfo(PreviousVersionNode *pv_node) { | |
3529 _prev_constant_pool_handle = constantPoolHandle(); // NULL handle | |
3530 _prev_EMCP_method_handles = NULL; | |
3531 | |
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3532 ConstantPool* cp = pv_node->prev_constant_pool(); |
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3533 assert(cp != NULL, "constant pool ref was unexpectedly cleared"); |
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3534 if (cp == NULL) { |
0 | 3535 return; // robustness |
3536 } | |
3537 | |
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3538 // make the ConstantPool* safe to return |
0 | 3539 _prev_constant_pool_handle = constantPoolHandle(cp); |
3540 | |
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3541 GrowableArray<Method*>* method_refs = pv_node->prev_EMCP_methods(); |
0 | 3542 if (method_refs == NULL) { |
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3543 // the InstanceKlass did not have any EMCP methods |
0 | 3544 return; |
3545 } | |
3546 | |
3547 _prev_EMCP_method_handles = new GrowableArray<methodHandle>(10); | |
3548 | |
3549 int n_methods = method_refs->length(); | |
3550 for (int i = 0; i < n_methods; i++) { | |
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3551 Method* method = method_refs->at(i); |
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3552 assert (method != NULL, "method has been cleared"); |
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3553 if (method == NULL) { |
0 | 3554 continue; // robustness |
3555 } | |
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3556 // make the Method* safe to return |
0 | 3557 _prev_EMCP_method_handles->append(methodHandle(method)); |
3558 } | |
3559 } | |
3560 | |
3561 | |
3562 // Destroy a PreviousVersionInfo | |
3563 PreviousVersionInfo::~PreviousVersionInfo() { | |
3564 // Since _prev_EMCP_method_handles is not C-heap allocated, we | |
3565 // don't have to delete it. | |
3566 } | |
3567 | |
3568 | |
3569 // Construct a helper for walking the previous versions array | |
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3570 PreviousVersionWalker::PreviousVersionWalker(InstanceKlass *ik) { |
0 | 3571 _previous_versions = ik->previous_versions(); |
3572 _current_index = 0; | |
3573 // _hm needs no initialization | |
3574 _current_p = NULL; | |
3575 } | |
3576 | |
3577 | |
3578 // Destroy a PreviousVersionWalker | |
3579 PreviousVersionWalker::~PreviousVersionWalker() { | |
3580 // Delete the current info just in case the caller didn't walk to | |
3581 // the end of the previous versions list. No harm if _current_p is | |
3582 // already NULL. | |
3583 delete _current_p; | |
3584 | |
3585 // When _hm is destroyed, all the Handles returned in | |
3586 // PreviousVersionInfo objects will be destroyed. | |
3587 // Also, after this destructor is finished it will be | |
3588 // safe to delete the GrowableArray allocated in the | |
3589 // PreviousVersionInfo objects. | |
3590 } | |
3591 | |
3592 | |
3593 // Return the interesting information for the next previous version | |
3594 // of the klass. Returns NULL if there are no more previous versions. | |
3595 PreviousVersionInfo* PreviousVersionWalker::next_previous_version() { | |
3596 if (_previous_versions == NULL) { | |
3597 // no previous versions so nothing to return | |
3598 return NULL; | |
3599 } | |
3600 | |
3601 delete _current_p; // cleanup the previous info for the caller | |
3602 _current_p = NULL; // reset to NULL so we don't delete same object twice | |
3603 | |
3604 int length = _previous_versions->length(); | |
3605 | |
3606 while (_current_index < length) { | |
3607 PreviousVersionNode * pv_node = _previous_versions->at(_current_index++); | |
6197 | 3608 PreviousVersionInfo * pv_info = new (ResourceObj::C_HEAP, mtClass) |
0 | 3609 PreviousVersionInfo(pv_node); |
3610 | |
3611 constantPoolHandle cp_h = pv_info->prev_constant_pool_handle(); | |
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3612 assert (!cp_h.is_null(), "null cp found in previous version"); |
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3613 |
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3614 // The caller will need to delete pv_info when they are done with it. |
0 | 3615 _current_p = pv_info; |
3616 return pv_info; | |
3617 } | |
3618 | |
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3619 // all of the underlying nodes' info has been deleted |
0 | 3620 return NULL; |
3621 } // end next_previous_version() |