Thu, 11 Apr 2013 09:08:15 -0700
8011972: Field can be erroneously marked as contended when @Contended annotation isn't present
Reviewed-by: kvn, kmo, shade
coleenp@4037 | 1 | /* |
coleenp@4490 | 2 | * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved. |
coleenp@4037 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
coleenp@4037 | 4 | * |
coleenp@4037 | 5 | * This code is free software; you can redistribute it and/or modify it |
coleenp@4037 | 6 | * under the terms of the GNU General Public License version 2 only, as |
coleenp@4037 | 7 | * published by the Free Software Foundation. |
coleenp@4037 | 8 | * |
coleenp@4037 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
coleenp@4037 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
coleenp@4037 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
coleenp@4037 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
coleenp@4037 | 13 | * accompanied this code). |
coleenp@4037 | 14 | * |
coleenp@4037 | 15 | * You should have received a copy of the GNU General Public License version |
coleenp@4037 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
coleenp@4037 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
coleenp@4037 | 18 | * |
coleenp@4037 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
coleenp@4037 | 20 | * or visit www.oracle.com if you need additional information or have any |
coleenp@4037 | 21 | * questions. |
coleenp@4037 | 22 | * |
coleenp@4037 | 23 | */ |
coleenp@4037 | 24 | |
coleenp@4037 | 25 | // A ClassLoaderData identifies the full set of class types that a class |
coleenp@4037 | 26 | // loader's name resolution strategy produces for a given configuration of the |
coleenp@4037 | 27 | // class loader. |
coleenp@4037 | 28 | // Class types in the ClassLoaderData may be defined by from class file binaries |
coleenp@4037 | 29 | // provided by the class loader, or from other class loader it interacts with |
coleenp@4037 | 30 | // according to its name resolution strategy. |
coleenp@4037 | 31 | // |
coleenp@4037 | 32 | // Class loaders that implement a deterministic name resolution strategy |
coleenp@4037 | 33 | // (including with respect to their delegation behavior), such as the boot, the |
coleenp@4037 | 34 | // extension, and the system loaders of the JDK's built-in class loader |
coleenp@4037 | 35 | // hierarchy, always produce the same linkset for a given configuration. |
coleenp@4037 | 36 | // |
coleenp@4037 | 37 | // ClassLoaderData carries information related to a linkset (e.g., |
coleenp@4037 | 38 | // metaspace holding its klass definitions). |
coleenp@4037 | 39 | // The System Dictionary and related data structures (e.g., placeholder table, |
coleenp@4037 | 40 | // loader constraints table) as well as the runtime representation of classes |
coleenp@4037 | 41 | // only reference ClassLoaderData. |
coleenp@4037 | 42 | // |
coleenp@4037 | 43 | // Instances of java.lang.ClassLoader holds a pointer to a ClassLoaderData that |
coleenp@4037 | 44 | // that represent the loader's "linking domain" in the JVM. |
coleenp@4037 | 45 | // |
coleenp@4037 | 46 | // The bootstrap loader (represented by NULL) also has a ClassLoaderData, |
coleenp@4037 | 47 | // the singleton class the_null_class_loader_data(). |
coleenp@4037 | 48 | |
coleenp@4037 | 49 | #include "precompiled.hpp" |
coleenp@4037 | 50 | #include "classfile/classLoaderData.hpp" |
coleenp@4037 | 51 | #include "classfile/classLoaderData.inline.hpp" |
coleenp@4037 | 52 | #include "classfile/javaClasses.hpp" |
coleenp@4490 | 53 | #include "classfile/metadataOnStackMark.hpp" |
coleenp@4037 | 54 | #include "classfile/systemDictionary.hpp" |
coleenp@4037 | 55 | #include "code/codeCache.hpp" |
coleenp@4037 | 56 | #include "memory/metadataFactory.hpp" |
coleenp@4037 | 57 | #include "memory/metaspaceShared.hpp" |
coleenp@4490 | 58 | #include "memory/oopFactory.hpp" |
coleenp@4037 | 59 | #include "runtime/jniHandles.hpp" |
coleenp@4037 | 60 | #include "runtime/mutex.hpp" |
coleenp@4037 | 61 | #include "runtime/safepoint.hpp" |
coleenp@4037 | 62 | #include "runtime/synchronizer.hpp" |
coleenp@4037 | 63 | #include "utilities/growableArray.hpp" |
coleenp@4037 | 64 | #include "utilities/ostream.hpp" |
coleenp@4037 | 65 | |
coleenp@4037 | 66 | ClassLoaderData * ClassLoaderData::_the_null_class_loader_data = NULL; |
coleenp@4037 | 67 | |
coleenp@4345 | 68 | ClassLoaderData::ClassLoaderData(Handle h_class_loader, bool is_anonymous) : |
coleenp@4345 | 69 | _class_loader(h_class_loader()), |
coleenp@4345 | 70 | _is_anonymous(is_anonymous), _keep_alive(is_anonymous), // initially |
coleenp@4345 | 71 | _metaspace(NULL), _unloading(false), _klasses(NULL), |
coleenp@4304 | 72 | _claimed(0), _jmethod_ids(NULL), _handles(NULL), _deallocate_list(NULL), |
coleenp@4304 | 73 | _next(NULL), _dependencies(NULL), |
coleenp@4037 | 74 | _metaspace_lock(new Mutex(Monitor::leaf+1, "Metaspace allocation lock", true)) { |
coleenp@4037 | 75 | // empty |
coleenp@4037 | 76 | } |
coleenp@4037 | 77 | |
coleenp@4304 | 78 | void ClassLoaderData::init_dependencies(TRAPS) { |
coleenp@4304 | 79 | // Create empty dependencies array to add to. CMS requires this to be |
coleenp@4304 | 80 | // an oop so that it can track additions via card marks. We think. |
coleenp@4304 | 81 | _dependencies = (oop)oopFactory::new_objectArray(2, CHECK); |
coleenp@4304 | 82 | } |
coleenp@4304 | 83 | |
coleenp@4037 | 84 | bool ClassLoaderData::claim() { |
coleenp@4037 | 85 | if (_claimed == 1) { |
coleenp@4037 | 86 | return false; |
coleenp@4037 | 87 | } |
coleenp@4037 | 88 | |
coleenp@4037 | 89 | return (int) Atomic::cmpxchg(1, &_claimed, 0) == 0; |
coleenp@4037 | 90 | } |
coleenp@4037 | 91 | |
coleenp@4037 | 92 | void ClassLoaderData::oops_do(OopClosure* f, KlassClosure* klass_closure, bool must_claim) { |
coleenp@4037 | 93 | if (must_claim && !claim()) { |
coleenp@4037 | 94 | return; |
coleenp@4037 | 95 | } |
coleenp@4037 | 96 | |
coleenp@4037 | 97 | f->do_oop(&_class_loader); |
coleenp@4304 | 98 | f->do_oop(&_dependencies); |
coleenp@4037 | 99 | _handles->oops_do(f); |
coleenp@4037 | 100 | if (klass_closure != NULL) { |
coleenp@4037 | 101 | classes_do(klass_closure); |
coleenp@4037 | 102 | } |
coleenp@4037 | 103 | } |
coleenp@4037 | 104 | |
coleenp@4037 | 105 | void ClassLoaderData::classes_do(KlassClosure* klass_closure) { |
coleenp@4037 | 106 | for (Klass* k = _klasses; k != NULL; k = k->next_link()) { |
coleenp@4037 | 107 | klass_closure->do_klass(k); |
coleenp@4751 | 108 | assert(k != k->next_link(), "no loops!"); |
coleenp@4037 | 109 | } |
coleenp@4037 | 110 | } |
coleenp@4037 | 111 | |
coleenp@4037 | 112 | void ClassLoaderData::classes_do(void f(InstanceKlass*)) { |
coleenp@4037 | 113 | for (Klass* k = _klasses; k != NULL; k = k->next_link()) { |
coleenp@4037 | 114 | if (k->oop_is_instance()) { |
coleenp@4037 | 115 | f(InstanceKlass::cast(k)); |
coleenp@4037 | 116 | } |
coleenp@4751 | 117 | assert(k != k->next_link(), "no loops!"); |
coleenp@4037 | 118 | } |
coleenp@4037 | 119 | } |
coleenp@4037 | 120 | |
coleenp@4037 | 121 | void ClassLoaderData::record_dependency(Klass* k, TRAPS) { |
coleenp@4037 | 122 | ClassLoaderData * const from_cld = this; |
coleenp@4037 | 123 | ClassLoaderData * const to_cld = k->class_loader_data(); |
coleenp@4037 | 124 | |
coleenp@4304 | 125 | // Dependency to the null class loader data doesn't need to be recorded |
coleenp@4304 | 126 | // because the null class loader data never goes away. |
coleenp@4304 | 127 | if (to_cld->is_the_null_class_loader_data()) { |
coleenp@4037 | 128 | return; |
coleenp@4037 | 129 | } |
coleenp@4037 | 130 | |
coleenp@4304 | 131 | oop to; |
coleenp@4304 | 132 | if (to_cld->is_anonymous()) { |
coleenp@4304 | 133 | // Anonymous class dependencies are through the mirror. |
coleenp@4304 | 134 | to = k->java_mirror(); |
coleenp@4304 | 135 | } else { |
coleenp@4304 | 136 | to = to_cld->class_loader(); |
coleenp@4037 | 137 | |
coleenp@4304 | 138 | // If from_cld is anonymous, even if it's class_loader is a parent of 'to' |
coleenp@4304 | 139 | // we still have to add it. The class_loader won't keep from_cld alive. |
coleenp@4304 | 140 | if (!from_cld->is_anonymous()) { |
coleenp@4304 | 141 | // Check that this dependency isn't from the same or parent class_loader |
coleenp@4304 | 142 | oop from = from_cld->class_loader(); |
coleenp@4304 | 143 | |
coleenp@4304 | 144 | oop curr = from; |
coleenp@4304 | 145 | while (curr != NULL) { |
coleenp@4304 | 146 | if (curr == to) { |
coleenp@4304 | 147 | return; // this class loader is in the parent list, no need to add it. |
coleenp@4304 | 148 | } |
coleenp@4304 | 149 | curr = java_lang_ClassLoader::parent(curr); |
coleenp@4304 | 150 | } |
coleenp@4037 | 151 | } |
coleenp@4037 | 152 | } |
coleenp@4037 | 153 | |
coleenp@4037 | 154 | // It's a dependency we won't find through GC, add it. This is relatively rare |
coleenp@4304 | 155 | // Must handle over GC point. |
coleenp@4304 | 156 | Handle dependency(THREAD, to); |
coleenp@4304 | 157 | from_cld->add_dependency(dependency, CHECK); |
coleenp@4037 | 158 | } |
coleenp@4037 | 159 | |
coleenp@4037 | 160 | |
coleenp@4304 | 161 | void ClassLoaderData::add_dependency(Handle dependency, TRAPS) { |
coleenp@4304 | 162 | // Check first if this dependency is already in the list. |
coleenp@4304 | 163 | // Save a pointer to the last to add to under the lock. |
coleenp@4304 | 164 | objArrayOop ok = (objArrayOop)_dependencies; |
coleenp@4304 | 165 | objArrayOop last = NULL; |
coleenp@4037 | 166 | while (ok != NULL) { |
coleenp@4304 | 167 | last = ok; |
coleenp@4304 | 168 | if (ok->obj_at(0) == dependency()) { |
coleenp@4304 | 169 | // Don't need to add it |
coleenp@4304 | 170 | return; |
coleenp@4037 | 171 | } |
coleenp@4037 | 172 | ok = (objArrayOop)ok->obj_at(1); |
coleenp@4037 | 173 | } |
coleenp@4304 | 174 | |
stefank@4353 | 175 | // Must handle over GC points |
stefank@4353 | 176 | assert (last != NULL, "dependencies should be initialized"); |
stefank@4353 | 177 | objArrayHandle last_handle(THREAD, last); |
stefank@4353 | 178 | |
coleenp@4304 | 179 | // Create a new dependency node with fields for (class_loader or mirror, next) |
coleenp@4304 | 180 | objArrayOop deps = oopFactory::new_objectArray(2, CHECK); |
coleenp@4304 | 181 | deps->obj_at_put(0, dependency()); |
coleenp@4304 | 182 | |
stefank@4353 | 183 | // Must handle over GC points |
coleenp@4304 | 184 | objArrayHandle new_dependency(THREAD, deps); |
coleenp@4304 | 185 | |
coleenp@4304 | 186 | // Add the dependency under lock |
coleenp@4304 | 187 | locked_add_dependency(last_handle, new_dependency); |
coleenp@4037 | 188 | } |
coleenp@4037 | 189 | |
coleenp@4304 | 190 | void ClassLoaderData::locked_add_dependency(objArrayHandle last_handle, |
coleenp@4304 | 191 | objArrayHandle new_dependency) { |
coleenp@4304 | 192 | |
coleenp@4304 | 193 | // Have to lock and put the new dependency on the end of the dependency |
coleenp@4304 | 194 | // array so the card mark for CMS sees that this dependency is new. |
coleenp@4304 | 195 | // Can probably do this lock free with some effort. |
coleenp@4304 | 196 | MutexLockerEx ml(metaspace_lock(), Mutex::_no_safepoint_check_flag); |
coleenp@4304 | 197 | |
coleenp@4304 | 198 | oop loader_or_mirror = new_dependency->obj_at(0); |
coleenp@4304 | 199 | |
coleenp@4304 | 200 | // Since the dependencies are only added, add to the end. |
coleenp@4304 | 201 | objArrayOop end = last_handle(); |
coleenp@4304 | 202 | objArrayOop last = NULL; |
coleenp@4304 | 203 | while (end != NULL) { |
coleenp@4304 | 204 | last = end; |
coleenp@4304 | 205 | // check again if another thread added it to the end. |
coleenp@4304 | 206 | if (end->obj_at(0) == loader_or_mirror) { |
coleenp@4304 | 207 | // Don't need to add it |
coleenp@4304 | 208 | return; |
coleenp@4304 | 209 | } |
coleenp@4304 | 210 | end = (objArrayOop)end->obj_at(1); |
coleenp@4037 | 211 | } |
coleenp@4304 | 212 | assert (last != NULL, "dependencies should be initialized"); |
coleenp@4304 | 213 | // fill in the first element with the oop in new_dependency. |
coleenp@4304 | 214 | if (last->obj_at(0) == NULL) { |
coleenp@4304 | 215 | last->obj_at_put(0, new_dependency->obj_at(0)); |
coleenp@4304 | 216 | } else { |
coleenp@4304 | 217 | last->obj_at_put(1, new_dependency()); |
coleenp@4037 | 218 | } |
coleenp@4037 | 219 | } |
coleenp@4037 | 220 | |
coleenp@4037 | 221 | void ClassLoaderDataGraph::clear_claimed_marks() { |
coleenp@4037 | 222 | for (ClassLoaderData* cld = _head; cld != NULL; cld = cld->next()) { |
coleenp@4037 | 223 | cld->clear_claimed(); |
coleenp@4037 | 224 | } |
coleenp@4037 | 225 | } |
coleenp@4037 | 226 | |
coleenp@4037 | 227 | void ClassLoaderData::add_class(Klass* k) { |
coleenp@4037 | 228 | MutexLockerEx ml(metaspace_lock(), Mutex::_no_safepoint_check_flag); |
coleenp@4037 | 229 | Klass* old_value = _klasses; |
coleenp@4037 | 230 | k->set_next_link(old_value); |
coleenp@4037 | 231 | // link the new item into the list |
coleenp@4037 | 232 | _klasses = k; |
coleenp@4037 | 233 | |
coleenp@4304 | 234 | if (TraceClassLoaderData && Verbose && k->class_loader_data() != NULL) { |
coleenp@4037 | 235 | ResourceMark rm; |
coleenp@4037 | 236 | tty->print_cr("[TraceClassLoaderData] Adding k: " PTR_FORMAT " %s to CLD: " |
coleenp@4037 | 237 | PTR_FORMAT " loader: " PTR_FORMAT " %s", |
coleenp@4037 | 238 | k, |
coleenp@4037 | 239 | k->external_name(), |
coleenp@4037 | 240 | k->class_loader_data(), |
coleenp@4037 | 241 | k->class_loader(), |
coleenp@4304 | 242 | loader_name()); |
coleenp@4037 | 243 | } |
coleenp@4037 | 244 | } |
coleenp@4037 | 245 | |
coleenp@4037 | 246 | // This is called by InstanceKlass::deallocate_contents() to remove the |
coleenp@4037 | 247 | // scratch_class for redefine classes. We need a lock because there it may not |
coleenp@4037 | 248 | // be called at a safepoint if there's an error. |
coleenp@4037 | 249 | void ClassLoaderData::remove_class(Klass* scratch_class) { |
coleenp@4037 | 250 | MutexLockerEx ml(metaspace_lock(), Mutex::_no_safepoint_check_flag); |
coleenp@4037 | 251 | Klass* prev = NULL; |
coleenp@4037 | 252 | for (Klass* k = _klasses; k != NULL; k = k->next_link()) { |
coleenp@4037 | 253 | if (k == scratch_class) { |
coleenp@4037 | 254 | if (prev == NULL) { |
coleenp@4037 | 255 | _klasses = k->next_link(); |
coleenp@4037 | 256 | } else { |
coleenp@4037 | 257 | Klass* next = k->next_link(); |
coleenp@4037 | 258 | prev->set_next_link(next); |
coleenp@4037 | 259 | } |
coleenp@4037 | 260 | return; |
coleenp@4037 | 261 | } |
coleenp@4037 | 262 | prev = k; |
coleenp@4751 | 263 | assert(k != k->next_link(), "no loops!"); |
coleenp@4037 | 264 | } |
coleenp@4037 | 265 | ShouldNotReachHere(); // should have found this class!! |
coleenp@4037 | 266 | } |
coleenp@4037 | 267 | |
coleenp@4304 | 268 | void ClassLoaderData::unload() { |
coleenp@4304 | 269 | _unloading = true; |
coleenp@4304 | 270 | |
coleenp@4304 | 271 | if (TraceClassLoaderData) { |
coleenp@4304 | 272 | ResourceMark rm; |
coleenp@4304 | 273 | tty->print("[ClassLoaderData: unload loader data "PTR_FORMAT, this); |
coleenp@4304 | 274 | tty->print(" for instance "PTR_FORMAT" of %s", class_loader(), |
coleenp@4304 | 275 | loader_name()); |
coleenp@4304 | 276 | if (is_anonymous()) { |
coleenp@4304 | 277 | tty->print(" for anonymous class "PTR_FORMAT " ", _klasses); |
coleenp@4304 | 278 | } |
coleenp@4304 | 279 | tty->print_cr("]"); |
coleenp@4304 | 280 | } |
coleenp@4304 | 281 | } |
coleenp@4304 | 282 | |
coleenp@4304 | 283 | bool ClassLoaderData::is_alive(BoolObjectClosure* is_alive_closure) const { |
coleenp@4304 | 284 | bool alive = |
coleenp@4304 | 285 | is_anonymous() ? |
coleenp@4304 | 286 | is_alive_closure->do_object_b(_klasses->java_mirror()) : |
coleenp@4304 | 287 | class_loader() == NULL || is_alive_closure->do_object_b(class_loader()); |
coleenp@4304 | 288 | assert(!alive || claimed(), "must be claimed"); |
coleenp@4304 | 289 | return alive; |
coleenp@4304 | 290 | } |
coleenp@4304 | 291 | |
coleenp@4304 | 292 | |
coleenp@4037 | 293 | ClassLoaderData::~ClassLoaderData() { |
coleenp@4037 | 294 | Metaspace *m = _metaspace; |
coleenp@4037 | 295 | if (m != NULL) { |
coleenp@4037 | 296 | _metaspace = NULL; |
coleenp@4037 | 297 | // release the metaspace |
coleenp@4037 | 298 | delete m; |
coleenp@4037 | 299 | // release the handles |
coleenp@4037 | 300 | if (_handles != NULL) { |
coleenp@4037 | 301 | JNIHandleBlock::release_block(_handles); |
coleenp@4037 | 302 | _handles = NULL; |
coleenp@4037 | 303 | } |
coleenp@4037 | 304 | } |
coleenp@4037 | 305 | |
coleenp@4037 | 306 | // Clear all the JNI handles for methods |
coleenp@4037 | 307 | // These aren't deallocated and are going to look like a leak, but that's |
coleenp@4037 | 308 | // needed because we can't really get rid of jmethodIDs because we don't |
coleenp@4037 | 309 | // know when native code is going to stop using them. The spec says that |
coleenp@4037 | 310 | // they're "invalid" but existing programs likely rely on their being |
coleenp@4037 | 311 | // NULL after class unloading. |
coleenp@4037 | 312 | if (_jmethod_ids != NULL) { |
coleenp@4037 | 313 | Method::clear_jmethod_ids(this); |
coleenp@4037 | 314 | } |
coleenp@4037 | 315 | // Delete lock |
coleenp@4037 | 316 | delete _metaspace_lock; |
coleenp@4037 | 317 | |
coleenp@4037 | 318 | // Delete free list |
coleenp@4037 | 319 | if (_deallocate_list != NULL) { |
coleenp@4037 | 320 | delete _deallocate_list; |
coleenp@4037 | 321 | } |
coleenp@4037 | 322 | } |
coleenp@4037 | 323 | |
twisti@4866 | 324 | /** |
twisti@4866 | 325 | * Returns true if this class loader data is for the extension class loader. |
twisti@4866 | 326 | */ |
twisti@4866 | 327 | bool ClassLoaderData::is_ext_class_loader_data() const { |
twisti@4866 | 328 | return SystemDictionary::is_ext_class_loader(class_loader()); |
twisti@4866 | 329 | } |
twisti@4866 | 330 | |
coleenp@4037 | 331 | Metaspace* ClassLoaderData::metaspace_non_null() { |
jmasa@4457 | 332 | assert(!DumpSharedSpaces, "wrong metaspace!"); |
coleenp@4037 | 333 | // If the metaspace has not been allocated, create a new one. Might want |
coleenp@4037 | 334 | // to create smaller arena for Reflection class loaders also. |
coleenp@4037 | 335 | // The reason for the delayed allocation is because some class loaders are |
coleenp@4037 | 336 | // simply for delegating with no metadata of their own. |
coleenp@4037 | 337 | if (_metaspace == NULL) { |
coleenp@4037 | 338 | MutexLockerEx ml(metaspace_lock(), Mutex::_no_safepoint_check_flag); |
coleenp@4037 | 339 | // Check again if metaspace has been allocated while we were getting this lock. |
coleenp@4037 | 340 | if (_metaspace != NULL) { |
coleenp@4037 | 341 | return _metaspace; |
coleenp@4037 | 342 | } |
coleenp@4304 | 343 | if (this == the_null_class_loader_data()) { |
coleenp@4304 | 344 | assert (class_loader() == NULL, "Must be"); |
jmasa@4382 | 345 | set_metaspace(new Metaspace(_metaspace_lock, Metaspace::BootMetaspaceType)); |
jmasa@4382 | 346 | } else if (is_anonymous()) { |
jmasa@4382 | 347 | if (TraceClassLoaderData && Verbose && class_loader() != NULL) { |
jmasa@4382 | 348 | tty->print_cr("is_anonymous: %s", class_loader()->klass()->internal_name()); |
jmasa@4382 | 349 | } |
jmasa@4382 | 350 | set_metaspace(new Metaspace(_metaspace_lock, Metaspace::AnonymousMetaspaceType)); |
jmasa@4382 | 351 | } else if (class_loader()->is_a(SystemDictionary::reflect_DelegatingClassLoader_klass())) { |
jmasa@4382 | 352 | if (TraceClassLoaderData && Verbose && class_loader() != NULL) { |
jmasa@4382 | 353 | tty->print_cr("is_reflection: %s", class_loader()->klass()->internal_name()); |
jmasa@4382 | 354 | } |
jmasa@4382 | 355 | set_metaspace(new Metaspace(_metaspace_lock, Metaspace::ReflectionMetaspaceType)); |
coleenp@4037 | 356 | } else { |
jmasa@4382 | 357 | set_metaspace(new Metaspace(_metaspace_lock, Metaspace::StandardMetaspaceType)); |
coleenp@4037 | 358 | } |
coleenp@4037 | 359 | } |
coleenp@4037 | 360 | return _metaspace; |
coleenp@4037 | 361 | } |
coleenp@4037 | 362 | |
coleenp@4037 | 363 | JNIHandleBlock* ClassLoaderData::handles() const { return _handles; } |
coleenp@4037 | 364 | void ClassLoaderData::set_handles(JNIHandleBlock* handles) { _handles = handles; } |
coleenp@4037 | 365 | |
coleenp@4037 | 366 | jobject ClassLoaderData::add_handle(Handle h) { |
coleenp@4037 | 367 | MutexLockerEx ml(metaspace_lock(), Mutex::_no_safepoint_check_flag); |
coleenp@4037 | 368 | if (handles() == NULL) { |
coleenp@4037 | 369 | set_handles(JNIHandleBlock::allocate_block()); |
coleenp@4037 | 370 | } |
coleenp@4037 | 371 | return handles()->allocate_handle(h()); |
coleenp@4037 | 372 | } |
coleenp@4037 | 373 | |
coleenp@4037 | 374 | // Add this metadata pointer to be freed when it's safe. This is only during |
coleenp@4037 | 375 | // class unloading because Handles might point to this metadata field. |
coleenp@4037 | 376 | void ClassLoaderData::add_to_deallocate_list(Metadata* m) { |
coleenp@4037 | 377 | // Metadata in shared region isn't deleted. |
coleenp@4037 | 378 | if (!m->is_shared()) { |
coleenp@4037 | 379 | MutexLockerEx ml(metaspace_lock(), Mutex::_no_safepoint_check_flag); |
coleenp@4037 | 380 | if (_deallocate_list == NULL) { |
coleenp@4037 | 381 | _deallocate_list = new (ResourceObj::C_HEAP, mtClass) GrowableArray<Metadata*>(100, true); |
coleenp@4037 | 382 | } |
coleenp@4037 | 383 | _deallocate_list->append_if_missing(m); |
coleenp@4037 | 384 | } |
coleenp@4037 | 385 | } |
coleenp@4037 | 386 | |
coleenp@4037 | 387 | // Deallocate free metadata on the free list. How useful the PermGen was! |
coleenp@4037 | 388 | void ClassLoaderData::free_deallocate_list() { |
coleenp@4037 | 389 | // Don't need lock, at safepoint |
coleenp@4037 | 390 | assert(SafepointSynchronize::is_at_safepoint(), "only called at safepoint"); |
coleenp@4037 | 391 | if (_deallocate_list == NULL) { |
coleenp@4037 | 392 | return; |
coleenp@4037 | 393 | } |
coleenp@4037 | 394 | // Go backwards because this removes entries that are freed. |
coleenp@4037 | 395 | for (int i = _deallocate_list->length() - 1; i >= 0; i--) { |
coleenp@4037 | 396 | Metadata* m = _deallocate_list->at(i); |
coleenp@4037 | 397 | if (!m->on_stack()) { |
coleenp@4037 | 398 | _deallocate_list->remove_at(i); |
coleenp@4037 | 399 | // There are only three types of metadata that we deallocate directly. |
coleenp@4037 | 400 | // Cast them so they can be used by the template function. |
coleenp@4037 | 401 | if (m->is_method()) { |
coleenp@4037 | 402 | MetadataFactory::free_metadata(this, (Method*)m); |
coleenp@4037 | 403 | } else if (m->is_constantPool()) { |
coleenp@4037 | 404 | MetadataFactory::free_metadata(this, (ConstantPool*)m); |
coleenp@4037 | 405 | } else if (m->is_klass()) { |
coleenp@4037 | 406 | MetadataFactory::free_metadata(this, (InstanceKlass*)m); |
coleenp@4037 | 407 | } else { |
coleenp@4037 | 408 | ShouldNotReachHere(); |
coleenp@4037 | 409 | } |
coleenp@4037 | 410 | } |
coleenp@4037 | 411 | } |
coleenp@4037 | 412 | } |
coleenp@4037 | 413 | |
coleenp@4304 | 414 | // These anonymous class loaders are to contain classes used for JSR292 |
coleenp@4304 | 415 | ClassLoaderData* ClassLoaderData::anonymous_class_loader_data(oop loader, TRAPS) { |
coleenp@4304 | 416 | // Add a new class loader data to the graph. |
coleenp@4345 | 417 | return ClassLoaderDataGraph::add(NULL, loader, CHECK_NULL); |
coleenp@4037 | 418 | } |
coleenp@4037 | 419 | |
coleenp@4304 | 420 | const char* ClassLoaderData::loader_name() { |
coleenp@4304 | 421 | // Handles null class loader |
coleenp@4304 | 422 | return SystemDictionary::loader_name(class_loader()); |
coleenp@4304 | 423 | } |
coleenp@4304 | 424 | |
coleenp@4304 | 425 | #ifndef PRODUCT |
coleenp@4037 | 426 | // Define to dump klasses |
coleenp@4037 | 427 | #undef CLD_DUMP_KLASSES |
coleenp@4037 | 428 | |
coleenp@4037 | 429 | void ClassLoaderData::dump(outputStream * const out) { |
coleenp@4037 | 430 | ResourceMark rm; |
coleenp@4037 | 431 | out->print("ClassLoaderData CLD: "PTR_FORMAT", loader: "PTR_FORMAT", loader_klass: "PTR_FORMAT" %s {", |
coleenp@4037 | 432 | this, class_loader(), |
coleenp@4304 | 433 | class_loader() != NULL ? class_loader()->klass() : NULL, loader_name()); |
coleenp@4037 | 434 | if (claimed()) out->print(" claimed "); |
coleenp@4037 | 435 | if (is_unloading()) out->print(" unloading "); |
coleenp@4037 | 436 | out->print(" handles " INTPTR_FORMAT, handles()); |
coleenp@4037 | 437 | out->cr(); |
coleenp@4037 | 438 | if (metaspace_or_null() != NULL) { |
coleenp@4037 | 439 | out->print_cr("metaspace: " PTR_FORMAT, metaspace_or_null()); |
coleenp@4037 | 440 | metaspace_or_null()->dump(out); |
coleenp@4037 | 441 | } else { |
coleenp@4037 | 442 | out->print_cr("metaspace: NULL"); |
coleenp@4037 | 443 | } |
coleenp@4037 | 444 | |
coleenp@4037 | 445 | #ifdef CLD_DUMP_KLASSES |
coleenp@4037 | 446 | if (Verbose) { |
coleenp@4037 | 447 | ResourceMark rm; |
coleenp@4037 | 448 | Klass* k = _klasses; |
coleenp@4037 | 449 | while (k != NULL) { |
coleenp@4037 | 450 | out->print_cr("klass "PTR_FORMAT", %s, CT: %d, MUT: %d", k, k->name()->as_C_string(), |
coleenp@4037 | 451 | k->has_modified_oops(), k->has_accumulated_modified_oops()); |
coleenp@4751 | 452 | assert(k != k->next_link(), "no loops!"); |
coleenp@4037 | 453 | k = k->next_link(); |
coleenp@4037 | 454 | } |
coleenp@4037 | 455 | } |
coleenp@4037 | 456 | #endif // CLD_DUMP_KLASSES |
coleenp@4037 | 457 | #undef CLD_DUMP_KLASSES |
coleenp@4037 | 458 | if (_jmethod_ids != NULL) { |
coleenp@4037 | 459 | Method::print_jmethod_ids(this, out); |
coleenp@4037 | 460 | } |
coleenp@4037 | 461 | out->print_cr("}"); |
coleenp@4037 | 462 | } |
coleenp@4037 | 463 | #endif // PRODUCT |
coleenp@4037 | 464 | |
coleenp@4037 | 465 | void ClassLoaderData::verify() { |
coleenp@4037 | 466 | oop cl = class_loader(); |
coleenp@4037 | 467 | |
coleenp@4304 | 468 | guarantee(this == class_loader_data(cl) || is_anonymous(), "Must be the same"); |
coleenp@4304 | 469 | guarantee(cl != NULL || this == ClassLoaderData::the_null_class_loader_data() || is_anonymous(), "must be"); |
coleenp@4037 | 470 | |
coleenp@4037 | 471 | // Verify the integrity of the allocated space. |
coleenp@4037 | 472 | if (metaspace_or_null() != NULL) { |
coleenp@4037 | 473 | metaspace_or_null()->verify(); |
coleenp@4037 | 474 | } |
coleenp@4037 | 475 | |
coleenp@4037 | 476 | for (Klass* k = _klasses; k != NULL; k = k->next_link()) { |
coleenp@4037 | 477 | guarantee(k->class_loader_data() == this, "Must be the same"); |
coleenp@4037 | 478 | k->verify(); |
coleenp@4751 | 479 | assert(k != k->next_link(), "no loops!"); |
coleenp@4037 | 480 | } |
coleenp@4037 | 481 | } |
coleenp@4037 | 482 | |
coleenp@4304 | 483 | |
coleenp@4037 | 484 | // GC root of class loader data created. |
coleenp@4037 | 485 | ClassLoaderData* ClassLoaderDataGraph::_head = NULL; |
coleenp@4037 | 486 | ClassLoaderData* ClassLoaderDataGraph::_unloading = NULL; |
coleenp@4037 | 487 | ClassLoaderData* ClassLoaderDataGraph::_saved_head = NULL; |
coleenp@4037 | 488 | |
coleenp@4037 | 489 | |
coleenp@4037 | 490 | // Add a new class loader data node to the list. Assign the newly created |
coleenp@4037 | 491 | // ClassLoaderData into the java/lang/ClassLoader object as a hidden field |
coleenp@4304 | 492 | ClassLoaderData* ClassLoaderDataGraph::add(ClassLoaderData** cld_addr, Handle loader, TRAPS) { |
coleenp@4037 | 493 | // Not assigned a class loader data yet. |
coleenp@4037 | 494 | // Create one. |
coleenp@4037 | 495 | ClassLoaderData* *list_head = &_head; |
coleenp@4037 | 496 | ClassLoaderData* next = _head; |
coleenp@4345 | 497 | |
coleenp@4345 | 498 | bool is_anonymous = (cld_addr == NULL); |
coleenp@4345 | 499 | ClassLoaderData* cld = new ClassLoaderData(loader, is_anonymous); |
coleenp@4037 | 500 | |
coleenp@4304 | 501 | if (cld_addr != NULL) { |
coleenp@4304 | 502 | // First, Atomically set it |
coleenp@4304 | 503 | ClassLoaderData* old = (ClassLoaderData*) Atomic::cmpxchg_ptr(cld, cld_addr, NULL); |
coleenp@4304 | 504 | if (old != NULL) { |
coleenp@4304 | 505 | delete cld; |
coleenp@4304 | 506 | // Returns the data. |
coleenp@4304 | 507 | return old; |
coleenp@4304 | 508 | } |
coleenp@4037 | 509 | } |
coleenp@4037 | 510 | |
coleenp@4037 | 511 | // We won the race, and therefore the task of adding the data to the list of |
coleenp@4037 | 512 | // class loader data |
coleenp@4037 | 513 | do { |
coleenp@4037 | 514 | cld->set_next(next); |
coleenp@4037 | 515 | ClassLoaderData* exchanged = (ClassLoaderData*)Atomic::cmpxchg_ptr(cld, list_head, next); |
coleenp@4037 | 516 | if (exchanged == next) { |
coleenp@4037 | 517 | if (TraceClassLoaderData) { |
coleenp@4304 | 518 | ResourceMark rm; |
coleenp@4037 | 519 | tty->print("[ClassLoaderData: "); |
coleenp@4037 | 520 | tty->print("create class loader data "PTR_FORMAT, cld); |
coleenp@4304 | 521 | tty->print(" for instance "PTR_FORMAT" of %s", cld->class_loader(), |
coleenp@4304 | 522 | cld->loader_name()); |
coleenp@4037 | 523 | tty->print_cr("]"); |
coleenp@4037 | 524 | } |
coleenp@4304 | 525 | // Create dependencies after the CLD is added to the list. Otherwise, |
coleenp@4304 | 526 | // the GC GC will not find the CLD and the _class_loader field will |
coleenp@4304 | 527 | // not be updated. |
coleenp@4304 | 528 | cld->init_dependencies(CHECK_NULL); |
coleenp@4037 | 529 | return cld; |
coleenp@4037 | 530 | } |
coleenp@4037 | 531 | next = exchanged; |
coleenp@4037 | 532 | } while (true); |
coleenp@4304 | 533 | |
coleenp@4037 | 534 | } |
coleenp@4037 | 535 | |
coleenp@4037 | 536 | void ClassLoaderDataGraph::oops_do(OopClosure* f, KlassClosure* klass_closure, bool must_claim) { |
coleenp@4037 | 537 | for (ClassLoaderData* cld = _head; cld != NULL; cld = cld->next()) { |
coleenp@4037 | 538 | cld->oops_do(f, klass_closure, must_claim); |
coleenp@4037 | 539 | } |
coleenp@4037 | 540 | } |
coleenp@4037 | 541 | |
coleenp@4304 | 542 | void ClassLoaderDataGraph::keep_alive_oops_do(OopClosure* f, KlassClosure* klass_closure, bool must_claim) { |
coleenp@4304 | 543 | for (ClassLoaderData* cld = _head; cld != NULL; cld = cld->next()) { |
coleenp@4304 | 544 | if (cld->keep_alive()) { |
coleenp@4304 | 545 | cld->oops_do(f, klass_closure, must_claim); |
coleenp@4304 | 546 | } |
coleenp@4304 | 547 | } |
coleenp@4304 | 548 | } |
coleenp@4304 | 549 | |
coleenp@4037 | 550 | void ClassLoaderDataGraph::always_strong_oops_do(OopClosure* f, KlassClosure* klass_closure, bool must_claim) { |
coleenp@4037 | 551 | if (ClassUnloading) { |
coleenp@4037 | 552 | ClassLoaderData::the_null_class_loader_data()->oops_do(f, klass_closure, must_claim); |
coleenp@4304 | 553 | // keep any special CLDs alive. |
coleenp@4304 | 554 | ClassLoaderDataGraph::keep_alive_oops_do(f, klass_closure, must_claim); |
coleenp@4037 | 555 | } else { |
coleenp@4037 | 556 | ClassLoaderDataGraph::oops_do(f, klass_closure, must_claim); |
coleenp@4037 | 557 | } |
coleenp@4037 | 558 | } |
coleenp@4037 | 559 | |
coleenp@4037 | 560 | void ClassLoaderDataGraph::classes_do(KlassClosure* klass_closure) { |
coleenp@4037 | 561 | for (ClassLoaderData* cld = _head; cld != NULL; cld = cld->next()) { |
coleenp@4037 | 562 | cld->classes_do(klass_closure); |
coleenp@4037 | 563 | } |
coleenp@4037 | 564 | } |
coleenp@4037 | 565 | |
coleenp@4037 | 566 | GrowableArray<ClassLoaderData*>* ClassLoaderDataGraph::new_clds() { |
coleenp@4037 | 567 | assert(_head == NULL || _saved_head != NULL, "remember_new_clds(true) not called?"); |
coleenp@4037 | 568 | |
coleenp@4037 | 569 | GrowableArray<ClassLoaderData*>* array = new GrowableArray<ClassLoaderData*>(); |
coleenp@4037 | 570 | |
coleenp@4037 | 571 | // The CLDs in [_head, _saved_head] were all added during last call to remember_new_clds(true); |
coleenp@4037 | 572 | ClassLoaderData* curr = _head; |
coleenp@4037 | 573 | while (curr != _saved_head) { |
coleenp@4037 | 574 | if (!curr->claimed()) { |
coleenp@4037 | 575 | array->push(curr); |
coleenp@4037 | 576 | |
coleenp@4037 | 577 | if (TraceClassLoaderData) { |
coleenp@4037 | 578 | tty->print("[ClassLoaderData] found new CLD: "); |
coleenp@4037 | 579 | curr->print_value_on(tty); |
coleenp@4037 | 580 | tty->cr(); |
coleenp@4037 | 581 | } |
coleenp@4037 | 582 | } |
coleenp@4037 | 583 | |
coleenp@4037 | 584 | curr = curr->_next; |
coleenp@4037 | 585 | } |
coleenp@4037 | 586 | |
coleenp@4037 | 587 | return array; |
coleenp@4037 | 588 | } |
coleenp@4037 | 589 | |
coleenp@4037 | 590 | #ifndef PRODUCT |
coleenp@4037 | 591 | // for debugging and hsfind(x) |
coleenp@4037 | 592 | bool ClassLoaderDataGraph::contains(address x) { |
coleenp@4037 | 593 | // I think we need the _metaspace_lock taken here because the class loader |
coleenp@4037 | 594 | // data graph could be changing while we are walking it (new entries added, |
coleenp@4037 | 595 | // new entries being unloaded, etc). |
coleenp@4037 | 596 | if (DumpSharedSpaces) { |
coleenp@4037 | 597 | // There are only two metaspaces to worry about. |
coleenp@4037 | 598 | ClassLoaderData* ncld = ClassLoaderData::the_null_class_loader_data(); |
coleenp@4037 | 599 | return (ncld->ro_metaspace()->contains(x) || ncld->rw_metaspace()->contains(x)); |
coleenp@4037 | 600 | } |
coleenp@4037 | 601 | |
coleenp@4037 | 602 | if (UseSharedSpaces && MetaspaceShared::is_in_shared_space(x)) { |
coleenp@4037 | 603 | return true; |
coleenp@4037 | 604 | } |
coleenp@4037 | 605 | |
coleenp@4037 | 606 | for (ClassLoaderData* cld = _head; cld != NULL; cld = cld->next()) { |
coleenp@4037 | 607 | if (cld->metaspace_or_null() != NULL && cld->metaspace_or_null()->contains(x)) { |
coleenp@4037 | 608 | return true; |
coleenp@4037 | 609 | } |
coleenp@4037 | 610 | } |
coleenp@4037 | 611 | |
coleenp@4037 | 612 | // Could also be on an unloading list which is okay, ie. still allocated |
coleenp@4037 | 613 | // for a little while. |
coleenp@4037 | 614 | for (ClassLoaderData* ucld = _unloading; ucld != NULL; ucld = ucld->next()) { |
coleenp@4037 | 615 | if (ucld->metaspace_or_null() != NULL && ucld->metaspace_or_null()->contains(x)) { |
coleenp@4037 | 616 | return true; |
coleenp@4037 | 617 | } |
coleenp@4037 | 618 | } |
coleenp@4037 | 619 | return false; |
coleenp@4037 | 620 | } |
coleenp@4037 | 621 | |
coleenp@4037 | 622 | bool ClassLoaderDataGraph::contains_loader_data(ClassLoaderData* loader_data) { |
coleenp@4037 | 623 | for (ClassLoaderData* data = _head; data != NULL; data = data->next()) { |
coleenp@4037 | 624 | if (loader_data == data) { |
coleenp@4037 | 625 | return true; |
coleenp@4037 | 626 | } |
coleenp@4037 | 627 | } |
coleenp@4037 | 628 | |
coleenp@4037 | 629 | return false; |
coleenp@4037 | 630 | } |
coleenp@4037 | 631 | #endif // PRODUCT |
coleenp@4037 | 632 | |
coleenp@4304 | 633 | |
coleenp@4037 | 634 | // Move class loader data from main list to the unloaded list for unloading |
coleenp@4037 | 635 | // and deallocation later. |
coleenp@4304 | 636 | bool ClassLoaderDataGraph::do_unloading(BoolObjectClosure* is_alive_closure) { |
coleenp@4037 | 637 | ClassLoaderData* data = _head; |
coleenp@4037 | 638 | ClassLoaderData* prev = NULL; |
coleenp@4037 | 639 | bool seen_dead_loader = false; |
coleenp@4037 | 640 | // mark metadata seen on the stack and code cache so we can delete |
coleenp@4037 | 641 | // unneeded entries. |
coleenp@4037 | 642 | bool has_redefined_a_class = JvmtiExport::has_redefined_a_class(); |
coleenp@4037 | 643 | MetadataOnStackMark md_on_stack; |
coleenp@4037 | 644 | while (data != NULL) { |
coleenp@4304 | 645 | if (data->keep_alive() || data->is_alive(is_alive_closure)) { |
coleenp@4037 | 646 | if (has_redefined_a_class) { |
coleenp@4037 | 647 | data->classes_do(InstanceKlass::purge_previous_versions); |
coleenp@4037 | 648 | } |
coleenp@4037 | 649 | data->free_deallocate_list(); |
coleenp@4037 | 650 | prev = data; |
coleenp@4037 | 651 | data = data->next(); |
coleenp@4037 | 652 | continue; |
coleenp@4037 | 653 | } |
coleenp@4037 | 654 | seen_dead_loader = true; |
coleenp@4037 | 655 | ClassLoaderData* dead = data; |
coleenp@4304 | 656 | dead->unload(); |
coleenp@4037 | 657 | data = data->next(); |
coleenp@4037 | 658 | // Remove from loader list. |
coleenp@4037 | 659 | if (prev != NULL) { |
coleenp@4037 | 660 | prev->set_next(data); |
coleenp@4037 | 661 | } else { |
coleenp@4037 | 662 | assert(dead == _head, "sanity check"); |
coleenp@4037 | 663 | _head = data; |
coleenp@4037 | 664 | } |
coleenp@4037 | 665 | dead->set_next(_unloading); |
coleenp@4037 | 666 | _unloading = dead; |
coleenp@4037 | 667 | } |
coleenp@4037 | 668 | return seen_dead_loader; |
coleenp@4037 | 669 | } |
coleenp@4037 | 670 | |
coleenp@4037 | 671 | void ClassLoaderDataGraph::purge() { |
coleenp@4037 | 672 | ClassLoaderData* list = _unloading; |
coleenp@4037 | 673 | _unloading = NULL; |
coleenp@4037 | 674 | ClassLoaderData* next = list; |
coleenp@4037 | 675 | while (next != NULL) { |
coleenp@4037 | 676 | ClassLoaderData* purge_me = next; |
coleenp@4037 | 677 | next = purge_me->next(); |
coleenp@4037 | 678 | delete purge_me; |
coleenp@4037 | 679 | } |
coleenp@4037 | 680 | } |
coleenp@4037 | 681 | |
coleenp@4037 | 682 | // CDS support |
coleenp@4037 | 683 | |
coleenp@4037 | 684 | // Global metaspaces for writing information to the shared archive. When |
coleenp@4037 | 685 | // application CDS is supported, we may need one per metaspace, so this |
coleenp@4037 | 686 | // sort of looks like it. |
coleenp@4037 | 687 | Metaspace* ClassLoaderData::_ro_metaspace = NULL; |
coleenp@4037 | 688 | Metaspace* ClassLoaderData::_rw_metaspace = NULL; |
coleenp@4037 | 689 | static bool _shared_metaspaces_initialized = false; |
coleenp@4037 | 690 | |
coleenp@4037 | 691 | // Initialize shared metaspaces (change to call from somewhere not lazily) |
coleenp@4037 | 692 | void ClassLoaderData::initialize_shared_metaspaces() { |
coleenp@4037 | 693 | assert(DumpSharedSpaces, "only use this for dumping shared spaces"); |
coleenp@4037 | 694 | assert(this == ClassLoaderData::the_null_class_loader_data(), |
coleenp@4037 | 695 | "only supported for null loader data for now"); |
coleenp@4037 | 696 | assert (!_shared_metaspaces_initialized, "only initialize once"); |
coleenp@4037 | 697 | MutexLockerEx ml(metaspace_lock(), Mutex::_no_safepoint_check_flag); |
jmasa@4382 | 698 | _ro_metaspace = new Metaspace(_metaspace_lock, Metaspace::ROMetaspaceType); |
jmasa@4382 | 699 | _rw_metaspace = new Metaspace(_metaspace_lock, Metaspace::ReadWriteMetaspaceType); |
coleenp@4037 | 700 | _shared_metaspaces_initialized = true; |
coleenp@4037 | 701 | } |
coleenp@4037 | 702 | |
coleenp@4037 | 703 | Metaspace* ClassLoaderData::ro_metaspace() { |
coleenp@4037 | 704 | assert(_ro_metaspace != NULL, "should already be initialized"); |
coleenp@4037 | 705 | return _ro_metaspace; |
coleenp@4037 | 706 | } |
coleenp@4037 | 707 | |
coleenp@4037 | 708 | Metaspace* ClassLoaderData::rw_metaspace() { |
coleenp@4037 | 709 | assert(_rw_metaspace != NULL, "should already be initialized"); |
coleenp@4037 | 710 | return _rw_metaspace; |
coleenp@4037 | 711 | } |
coleenp@4037 | 712 | |
coleenp@4037 | 713 | |
coleenp@4037 | 714 | ClassLoaderDataGraphMetaspaceIterator::ClassLoaderDataGraphMetaspaceIterator() { |
coleenp@4037 | 715 | _data = ClassLoaderDataGraph::_head; |
coleenp@4037 | 716 | } |
coleenp@4037 | 717 | |
coleenp@4037 | 718 | ClassLoaderDataGraphMetaspaceIterator::~ClassLoaderDataGraphMetaspaceIterator() {} |
coleenp@4037 | 719 | |
coleenp@4037 | 720 | #ifndef PRODUCT |
coleenp@4037 | 721 | // callable from debugger |
coleenp@4037 | 722 | extern "C" int print_loader_data_graph() { |
coleenp@4037 | 723 | ClassLoaderDataGraph::dump_on(tty); |
coleenp@4037 | 724 | return 0; |
coleenp@4037 | 725 | } |
coleenp@4037 | 726 | |
coleenp@4037 | 727 | void ClassLoaderDataGraph::verify() { |
coleenp@4037 | 728 | for (ClassLoaderData* data = _head; data != NULL; data = data->next()) { |
coleenp@4037 | 729 | data->verify(); |
coleenp@4037 | 730 | } |
coleenp@4037 | 731 | } |
coleenp@4037 | 732 | |
coleenp@4037 | 733 | void ClassLoaderDataGraph::dump_on(outputStream * const out) { |
coleenp@4037 | 734 | for (ClassLoaderData* data = _head; data != NULL; data = data->next()) { |
coleenp@4037 | 735 | data->dump(out); |
coleenp@4037 | 736 | } |
coleenp@4037 | 737 | MetaspaceAux::dump(out); |
coleenp@4037 | 738 | } |
acorn@4497 | 739 | #endif // PRODUCT |
coleenp@4037 | 740 | |
coleenp@4037 | 741 | void ClassLoaderData::print_value_on(outputStream* out) const { |
coleenp@4037 | 742 | if (class_loader() == NULL) { |
acorn@4497 | 743 | out->print("NULL class_loader"); |
coleenp@4037 | 744 | } else { |
coleenp@4037 | 745 | out->print("class loader "PTR_FORMAT, this); |
coleenp@4037 | 746 | class_loader()->print_value_on(out); |
coleenp@4037 | 747 | } |
coleenp@4037 | 748 | } |