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src/hotspot/share/classfile/classLoaderData.cpp
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*** 45,55 ****
//
// The bootstrap loader (represented by NULL) also has a ClassLoaderData,
// the singleton class the_null_class_loader_data().
#include "precompiled.hpp"
- #include "classfile/classLoaderData.hpp"
#include "classfile/classLoaderData.inline.hpp"
#include "classfile/dictionary.hpp"
#include "classfile/javaClasses.hpp"
#include "classfile/metadataOnStackMark.hpp"
#include "classfile/moduleEntry.hpp"
--- 45,54 ----
*** 57,68 ****
#include "classfile/systemDictionary.hpp"
#include "code/codeCache.hpp"
#include "gc/shared/gcLocker.hpp"
#include "logging/log.hpp"
#include "logging/logStream.hpp"
#include "memory/metadataFactory.hpp"
- #include "memory/metaspaceShared.hpp"
#include "memory/oopFactory.hpp"
#include "memory/resourceArea.hpp"
#include "oops/objArrayOop.inline.hpp"
#include "oops/oop.inline.hpp"
#include "runtime/atomic.hpp"
--- 56,67 ----
#include "classfile/systemDictionary.hpp"
#include "code/codeCache.hpp"
#include "gc/shared/gcLocker.hpp"
#include "logging/log.hpp"
#include "logging/logStream.hpp"
+ #include "memory/metaspace.hpp"
#include "memory/metadataFactory.hpp"
#include "memory/oopFactory.hpp"
#include "memory/resourceArea.hpp"
#include "oops/objArrayOop.inline.hpp"
#include "oops/oop.inline.hpp"
#include "runtime/atomic.hpp"
*** 70,140 ****
#include "runtime/jniHandles.hpp"
#include "runtime/mutex.hpp"
#include "runtime/orderAccess.hpp"
#include "runtime/safepoint.hpp"
#include "runtime/synchronizer.hpp"
- #include "utilities/growableArray.hpp"
- #include "utilities/macros.hpp"
#include "utilities/ostream.hpp"
#if INCLUDE_ALL_GCS
#include "gc/g1/g1SATBCardTableModRefBS.hpp"
#endif // INCLUDE_ALL_GCS
#if INCLUDE_TRACE
#include "trace/tracing.hpp"
#endif
! ClassLoaderData * ClassLoaderData::_the_null_class_loader_data = NULL;
!
! ClassLoaderData::ClassLoaderData(Handle h_class_loader, bool is_anonymous, Dependencies dependencies) :
! _class_loader(h_class_loader()),
! _is_anonymous(is_anonymous),
! // An anonymous class loader data doesn't have anything to keep
! // it from being unloaded during parsing of the anonymous class.
! // The null-class-loader should always be kept alive.
! _keep_alive((is_anonymous || h_class_loader.is_null()) ? 1 : 0),
! _metaspace(NULL), _unloading(false), _klasses(NULL),
! _modules(NULL), _packages(NULL),
! _claimed(0), _modified_oops(true), _accumulated_modified_oops(false),
! _jmethod_ids(NULL), _handles(), _deallocate_list(NULL),
! _next(NULL), _dependencies(dependencies),
! _metaspace_lock(new Mutex(Monitor::leaf+1, "Metaspace allocation lock", true,
! Monitor::_safepoint_check_never)) {
! // A ClassLoaderData created solely for an anonymous class should never have a
! // ModuleEntryTable or PackageEntryTable created for it. The defining package
! // and module for an anonymous class will be found in its host class.
! if (!is_anonymous) {
! _packages = new PackageEntryTable(PackageEntryTable::_packagetable_entry_size);
! if (h_class_loader.is_null()) {
! // Create unnamed module for boot loader
! _unnamed_module = ModuleEntry::create_boot_unnamed_module(this);
! } else {
! // Create unnamed module for all other loaders
! _unnamed_module = ModuleEntry::create_unnamed_module(this);
}
! } else {
! _unnamed_module = NULL;
}
! if (!is_anonymous) {
! _dictionary = create_dictionary();
! } else {
! _dictionary = NULL;
! }
! TRACE_INIT_ID(this);
}
! void ClassLoaderData::init_dependencies(TRAPS) {
! assert(!Universe::is_fully_initialized(), "should only be called when initializing");
! assert(is_the_null_class_loader_data(), "should only call this for the null class loader");
! _dependencies.init(CHECK);
}
! void ClassLoaderData::Dependencies::init(TRAPS) {
! // Create empty dependencies array to add to. CMS requires this to be
! // an oop so that it can track additions via card marks. We think.
! _list_head = oopFactory::new_objectArray(2, CHECK);
}
ClassLoaderData::ChunkedHandleList::~ChunkedHandleList() {
Chunk* c = _head;
while (c != NULL) {
--- 69,156 ----
#include "runtime/jniHandles.hpp"
#include "runtime/mutex.hpp"
#include "runtime/orderAccess.hpp"
#include "runtime/safepoint.hpp"
#include "runtime/synchronizer.hpp"
#include "utilities/ostream.hpp"
#if INCLUDE_ALL_GCS
#include "gc/g1/g1SATBCardTableModRefBS.hpp"
#endif // INCLUDE_ALL_GCS
#if INCLUDE_TRACE
#include "trace/tracing.hpp"
+ #include "utilities/ticks.hpp"
#endif
! void ClassLoaderData::Dependencies::init(TRAPS) {
! // Create empty dependencies array to add to. CMS requires this to be
! // an oop so that it can track additions via card marks. We think.
! _list_head = oopFactory::new_objectArray(2, CHECK);
! }
! void ClassLoaderData::Dependencies::add(Handle dependency, TRAPS) {
! // Check first if this dependency is already in the list.
! // Save a pointer to the last to add to under the lock.
! objArrayOop ok = _list_head;
! objArrayOop last = NULL;
! while (ok != NULL) {
! last = ok;
! if (ok->obj_at(0) == dependency()) {
! // Don't need to add it
! return;
}
! ok = (objArrayOop)ok->obj_at(1);
}
! // Must handle over GC points
! assert(last != NULL, "dependencies should be initialized");
! objArrayHandle last_handle(THREAD, last);
!
! // Create a new dependency node with fields for (class_loader or mirror, next)
! objArrayOop deps = oopFactory::new_objectArray(2, CHECK);
! deps->obj_at_put(0, dependency());
!
! // Must handle over GC points
! objArrayHandle new_dependency(THREAD, deps);
!
! // Add the dependency under lock
! locked_add(last_handle, new_dependency, THREAD);
}
! void ClassLoaderData::Dependencies::locked_add(objArrayHandle last_handle,
! objArrayHandle new_dependency,
! Thread* THREAD) {
!
! // Have to lock and put the new dependency on the end of the dependency
! // array so the card mark for CMS sees that this dependency is new.
! // Can probably do this lock free with some effort.
! ObjectLocker ol(Handle(THREAD, _list_head), THREAD);
!
! oop loader_or_mirror = new_dependency->obj_at(0);
!
! // Since the dependencies are only added, add to the end.
! objArrayOop end = last_handle();
! objArrayOop last = NULL;
! while (end != NULL) {
! last = end;
! // check again if another thread added it to the end.
! if (end->obj_at(0) == loader_or_mirror) {
! // Don't need to add it
! return;
! }
! end = (objArrayOop)end->obj_at(1);
! }
! assert(last != NULL, "dependencies should be initialized");
! // fill in the first element with the oop in new_dependency.
! if (last->obj_at(0) == NULL) {
! last->obj_at_put(0, new_dependency->obj_at(0));
! } else {
! last->obj_at_put(1, new_dependency());
! }
}
! void ClassLoaderData::Dependencies::oops_do(OopClosure* f) {
! f->do_oop((oop*)&_list_head);
}
ClassLoaderData::ChunkedHandleList::~ChunkedHandleList() {
Chunk* c = _head;
while (c != NULL) {
*** 153,170 ****
*handle = o;
OrderAccess::release_store(&_head->_size, _head->_size + 1);
return handle;
}
- inline void ClassLoaderData::ChunkedHandleList::oops_do_chunk(OopClosure* f, Chunk* c, const juint size) {
- for (juint i = 0; i < size; i++) {
- if (c->_data[i] != NULL) {
- f->do_oop(&c->_data[i]);
- }
- }
- }
-
void ClassLoaderData::ChunkedHandleList::oops_do(OopClosure* f) {
Chunk* head = OrderAccess::load_acquire(&_head);
if (head != NULL) {
// Must be careful when reading size of head
oops_do_chunk(f, head, OrderAccess::load_acquire(&head->_size));
--- 169,178 ----
*** 172,187 ****
oops_do_chunk(f, c, c->_size);
}
}
}
#ifdef ASSERT
class VerifyContainsOopClosure : public OopClosure {
oop* _target;
bool _found;
! public:
VerifyContainsOopClosure(oop* target) : _target(target), _found(false) {}
void do_oop(oop* p) {
if (p == _target) {
_found = true;
--- 180,203 ----
oops_do_chunk(f, c, c->_size);
}
}
}
+ inline void ClassLoaderData::ChunkedHandleList::oops_do_chunk(OopClosure* f, Chunk* c, const juint size) {
+ for (juint i = 0; i < size; i++) {
+ if (c->_data[i] != NULL) {
+ f->do_oop(&c->_data[i]);
+ }
+ }
+ }
+
#ifdef ASSERT
class VerifyContainsOopClosure : public OopClosure {
oop* _target;
bool _found;
! public:
VerifyContainsOopClosure(oop* target) : _target(target), _found(false) {}
void do_oop(oop* p) {
if (p == _target) {
_found = true;
*** 203,474 ****
oops_do(&cl);
return cl.found();
}
#endif // ASSERT
! bool ClassLoaderData::claim() {
! if (_claimed == 1) {
! return false;
! }
! return (int) Atomic::cmpxchg(1, &_claimed, 0) == 0;
! }
! // Anonymous classes have their own ClassLoaderData that is marked to keep alive
! // while the class is being parsed, and if the class appears on the module fixup list.
! // Due to the uniqueness that no other class shares the anonymous class' name or
! // ClassLoaderData, no other non-GC thread has knowledge of the anonymous class while
! // it is being defined, therefore _keep_alive is not volatile or atomic.
! void ClassLoaderData::inc_keep_alive() {
! if (is_anonymous()) {
! assert(_keep_alive >= 0, "Invalid keep alive increment count");
! _keep_alive++;
}
! }
!
! void ClassLoaderData::dec_keep_alive() {
! if (is_anonymous()) {
! assert(_keep_alive > 0, "Invalid keep alive decrement count");
! _keep_alive--;
}
}
! void ClassLoaderData::oops_do(OopClosure* f, bool must_claim, bool clear_mod_oops) {
! if (must_claim && !claim()) {
! return;
! }
!
! // Only clear modified_oops after the ClassLoaderData is claimed.
! if (clear_mod_oops) {
! clear_modified_oops();
! }
! f->do_oop(&_class_loader);
! _dependencies.oops_do(f);
! _handles.oops_do(f);
}
! void ClassLoaderData::Dependencies::oops_do(OopClosure* f) {
! f->do_oop((oop*)&_list_head);
! }
! void ClassLoaderData::classes_do(KlassClosure* klass_closure) {
! // Lock-free access requires load_acquire
! for (Klass* k = OrderAccess::load_acquire(&_klasses); k != NULL; k = k->next_link()) {
! klass_closure->do_klass(k);
! assert(k != k->next_link(), "no loops!");
}
! }
!
! void ClassLoaderData::classes_do(void f(Klass * const)) {
! // Lock-free access requires load_acquire
! for (Klass* k = OrderAccess::load_acquire(&_klasses); k != NULL; k = k->next_link()) {
! f(k);
! assert(k != k->next_link(), "no loops!");
}
- }
! void ClassLoaderData::methods_do(void f(Method*)) {
! // Lock-free access requires load_acquire
! for (Klass* k = OrderAccess::load_acquire(&_klasses); k != NULL; k = k->next_link()) {
! if (k->is_instance_klass() && InstanceKlass::cast(k)->is_loaded()) {
! InstanceKlass::cast(k)->methods_do(f);
! }
}
}
! void ClassLoaderData::loaded_classes_do(KlassClosure* klass_closure) {
! // Lock-free access requires load_acquire
! for (Klass* k = OrderAccess::load_acquire(&_klasses); k != NULL; k = k->next_link()) {
! // Do not filter ArrayKlass oops here...
! if (k->is_array_klass() || (k->is_instance_klass() && InstanceKlass::cast(k)->is_loaded())) {
! klass_closure->do_klass(k);
! }
! }
! }
! void ClassLoaderData::classes_do(void f(InstanceKlass*)) {
! // Lock-free access requires load_acquire
! for (Klass* k = OrderAccess::load_acquire(&_klasses); k != NULL; k = k->next_link()) {
! if (k->is_instance_klass()) {
! f(InstanceKlass::cast(k));
! }
! assert(k != k->next_link(), "no loops!");
}
- }
! void ClassLoaderData::modules_do(void f(ModuleEntry*)) {
! assert_locked_or_safepoint(Module_lock);
! if (_unnamed_module != NULL) {
! f(_unnamed_module);
! }
if (_modules != NULL) {
! for (int i = 0; i < _modules->table_size(); i++) {
! for (ModuleEntry* entry = _modules->bucket(i);
! entry != NULL;
! entry = entry->next()) {
! f(entry);
! }
! }
}
- }
! void ClassLoaderData::packages_do(void f(PackageEntry*)) {
! assert_locked_or_safepoint(Module_lock);
! if (_packages != NULL) {
! for (int i = 0; i < _packages->table_size(); i++) {
! for (PackageEntry* entry = _packages->bucket(i);
! entry != NULL;
! entry = entry->next()) {
! f(entry);
! }
! }
}
- }
! void ClassLoaderData::record_dependency(const Klass* k, TRAPS) {
! assert(k != NULL, "invariant");
!
! ClassLoaderData * const from_cld = this;
! ClassLoaderData * const to_cld = k->class_loader_data();
!
! // Dependency to the null class loader data doesn't need to be recorded
! // because the null class loader data never goes away.
! if (to_cld->is_the_null_class_loader_data()) {
! return;
}
! oop to;
! if (to_cld->is_anonymous()) {
! // Anonymous class dependencies are through the mirror.
! to = k->java_mirror();
! } else {
! to = to_cld->class_loader();
!
! // If from_cld is anonymous, even if it's class_loader is a parent of 'to'
! // we still have to add it. The class_loader won't keep from_cld alive.
! if (!from_cld->is_anonymous()) {
! // Check that this dependency isn't from the same or parent class_loader
! oop from = from_cld->class_loader();
!
! oop curr = from;
! while (curr != NULL) {
! if (curr == to) {
! return; // this class loader is in the parent list, no need to add it.
! }
! curr = java_lang_ClassLoader::parent(curr);
! }
}
}
! // It's a dependency we won't find through GC, add it. This is relatively rare
! // Must handle over GC point.
! Handle dependency(THREAD, to);
! from_cld->_dependencies.add(dependency, CHECK);
!
! // Added a potentially young gen oop to the ClassLoaderData
! record_modified_oops();
! }
!
!
! void ClassLoaderData::Dependencies::add(Handle dependency, TRAPS) {
! // Check first if this dependency is already in the list.
! // Save a pointer to the last to add to under the lock.
! objArrayOop ok = _list_head;
! objArrayOop last = NULL;
! while (ok != NULL) {
! last = ok;
! if (ok->obj_at(0) == dependency()) {
! // Don't need to add it
! return;
! }
! ok = (objArrayOop)ok->obj_at(1);
}
-
- // Must handle over GC points
- assert (last != NULL, "dependencies should be initialized");
- objArrayHandle last_handle(THREAD, last);
-
- // Create a new dependency node with fields for (class_loader or mirror, next)
- objArrayOop deps = oopFactory::new_objectArray(2, CHECK);
- deps->obj_at_put(0, dependency());
-
- // Must handle over GC points
- objArrayHandle new_dependency(THREAD, deps);
-
- // Add the dependency under lock
- locked_add(last_handle, new_dependency, THREAD);
}
! void ClassLoaderData::Dependencies::locked_add(objArrayHandle last_handle,
! objArrayHandle new_dependency,
! Thread* THREAD) {
!
! // Have to lock and put the new dependency on the end of the dependency
! // array so the card mark for CMS sees that this dependency is new.
! // Can probably do this lock free with some effort.
! ObjectLocker ol(Handle(THREAD, _list_head), THREAD);
!
! oop loader_or_mirror = new_dependency->obj_at(0);
! // Since the dependencies are only added, add to the end.
! objArrayOop end = last_handle();
! objArrayOop last = NULL;
! while (end != NULL) {
! last = end;
! // check again if another thread added it to the end.
! if (end->obj_at(0) == loader_or_mirror) {
! // Don't need to add it
return;
}
! end = (objArrayOop)end->obj_at(1);
}
- assert (last != NULL, "dependencies should be initialized");
- // fill in the first element with the oop in new_dependency.
- if (last->obj_at(0) == NULL) {
- last->obj_at_put(0, new_dependency->obj_at(0));
} else {
! last->obj_at_put(1, new_dependency());
}
- }
-
- void ClassLoaderDataGraph::clear_claimed_marks() {
- for (ClassLoaderData* cld = _head; cld != NULL; cld = cld->next()) {
- cld->clear_claimed();
}
}
! void ClassLoaderData::add_class(Klass* k, bool publicize /* true */) {
! {
! MutexLockerEx ml(metaspace_lock(), Mutex::_no_safepoint_check_flag);
! Klass* old_value = _klasses;
! k->set_next_link(old_value);
! // Link the new item into the list, making sure the linked class is stable
! // since the list can be walked without a lock
! OrderAccess::release_store(&_klasses, k);
}
-
- if (publicize && k->class_loader_data() != NULL) {
- ResourceMark rm;
- log_trace(class, loader, data)("Adding k: " PTR_FORMAT " %s to CLD: "
- PTR_FORMAT " loader: " PTR_FORMAT " %s",
- p2i(k),
- k->external_name(),
- p2i(k->class_loader_data()),
- p2i((void *)k->class_loader()),
- loader_name());
}
}
// Class iterator used by the compiler. It gets some number of classes at
// a safepoint to decay invocation counters on the methods.
class ClassLoaderDataGraphKlassIteratorStatic {
ClassLoaderData* _current_loader_data;
Klass* _current_class_entry;
- public:
-
- ClassLoaderDataGraphKlassIteratorStatic() : _current_loader_data(NULL), _current_class_entry(NULL) {}
InstanceKlass* try_get_next_class() {
assert(SafepointSynchronize::is_at_safepoint(), "only called at safepoint");
int max_classes = InstanceKlass::number_of_instance_classes();
assert(max_classes > 0, "should not be called with no instance classes");
--- 219,431 ----
oops_do(&cl);
return cl.found();
}
#endif // ASSERT
! static const int _boot_loader_dictionary_size = 1009;
! static const int _default_loader_dictionary_size = 107;
! static Dictionary* create_dictionary(ClassLoaderData* cld) {
! assert(cld != NULL, "invariant");
! assert(!cld->is_anonymous(), "anonymous class loader data do not have a dictionary");
! int size;
! bool resizable = false;
! if (ClassLoaderData::the_null_class_loader_data() == NULL) {
! size = _boot_loader_dictionary_size;
! resizable = true;
! } else if (cld->class_loader()->is_a(SystemDictionary::reflect_DelegatingClassLoader_klass())) {
! size = 1; // there's only one class in relection class loader and no initiated classes
! } else if (cld->is_system_class_loader_data()) {
! size = _boot_loader_dictionary_size;
! resizable = true;
! } else {
! size = _default_loader_dictionary_size;
! resizable = true;
}
! if (!DynamicallyResizeSystemDictionaries || DumpSharedSpaces || UseSharedSpaces) {
! resizable = false;
}
+ return new Dictionary(cld, size, resizable);
}
! ClassLoaderData * ClassLoaderData::_the_null_class_loader_data = NULL;
! void ClassLoaderData::init_null_class_loader_data() {
! assert(_the_null_class_loader_data == NULL, "cannot initialize twice");
! assert(ClassLoaderDataGraph::_head == NULL, "cannot initialize twice");
!
! // We explicitly initialize the Dependencies object at a later phase in the initialization
! _the_null_class_loader_data = new ClassLoaderData(Handle(), false, Dependencies());
! ClassLoaderDataGraph::_head = _the_null_class_loader_data;
! assert(_the_null_class_loader_data->is_the_null_class_loader_data(), "Must be");
}
! ClassLoaderData::ClassLoaderData(Handle h_class_loader, bool is_anonymous, Dependencies dependencies) :
! _class_loader(h_class_loader()),
! _is_anonymous(is_anonymous),
! // An anonymous class loader data doesn't have anything to keep
! // it from being unloaded during parsing of the anonymous class.
! // The null-class-loader should always be kept alive.
! _keep_alive((is_anonymous || h_class_loader.is_null()) ? 1 : 0),
! _metaspace(NULL), _unloading(false), _klasses(NULL),
! _modules(NULL), _packages(NULL),
! _claimed(0), _modified_oops(true), _accumulated_modified_oops(false),
! _jmethod_ids(NULL), _handles(), _deallocate_list(NULL),
! _next(NULL), _dependencies(dependencies),
! _metaspace_lock(new Mutex(Monitor::leaf+1, "Metaspace allocation lock", true,
! Monitor::_safepoint_check_never)) {
! // A ClassLoaderData created solely for an anonymous class should never have a
! // ModuleEntryTable or PackageEntryTable created for it. The defining package
! // and module for an anonymous class will be found in its host class.
! if (!is_anonymous) {
! _packages = new PackageEntryTable(PackageEntryTable::_packagetable_entry_size);
! if (h_class_loader.is_null()) {
! // Create unnamed module for boot loader
! _unnamed_module = ModuleEntry::create_boot_unnamed_module(this);
! } else {
! // Create unnamed module for all other loaders
! _unnamed_module = ModuleEntry::create_unnamed_module(this);
}
! } else {
! _unnamed_module = NULL;
}
! if (!is_anonymous) {
! _dictionary = create_dictionary(this);
! } else {
! _dictionary = NULL;
}
+ TRACE_INIT_ID(this);
}
! ClassLoaderData::~ClassLoaderData() {
! // Release C heap structures for all the classes.
! classes_do(InstanceKlass::release_C_heap_structures);
! // Release C heap allocated hashtable for all the packages.
! if (_packages != NULL) {
! // Destroy the table itself
! delete _packages;
! _packages = NULL;
}
! // Release C heap allocated hashtable for all the modules.
if (_modules != NULL) {
! // Destroy the table itself
! delete _modules;
! _modules = NULL;
}
! // Release C heap allocated hashtable for the dictionary
! if (_dictionary != NULL) {
! // Destroy the table itself
! delete _dictionary;
! _dictionary = NULL;
}
! if (_unnamed_module != NULL) {
! _unnamed_module->delete_unnamed_module();
! _unnamed_module = NULL;
}
! // release the metaspace
! Metaspace *m = _metaspace;
! if (m != NULL) {
! _metaspace = NULL;
! delete m;
}
+ // Clear all the JNI handles for methods
+ // These aren't deallocated and are going to look like a leak, but that's
+ // needed because we can't really get rid of jmethodIDs because we don't
+ // know when native code is going to stop using them. The spec says that
+ // they're "invalid" but existing programs likely rely on their being
+ // NULL after class unloading.
+ if (_jmethod_ids != NULL) {
+ Method::clear_jmethod_ids(this);
}
+ // Delete lock
+ delete _metaspace_lock;
! // Delete free list
! if (_deallocate_list != NULL) {
! delete _deallocate_list;
}
}
! void ClassLoaderData::init_dependencies(TRAPS) {
! assert(!Universe::is_fully_initialized(), "should only be called when initializing");
! assert(is_the_null_class_loader_data(), "should only call this for the null class loader");
! _dependencies.init(CHECK);
! }
! // Deallocate free metadata on the free list. How useful the PermGen was!
! void ClassLoaderData::free_deallocate_list() {
! // Don't need lock, at safepoint
! assert(SafepointSynchronize::is_at_safepoint(), "only called at safepoint");
! assert(!is_unloading(), "only called for ClassLoaderData that are not unloading");
! if (_deallocate_list == NULL) {
return;
}
! // Go backwards because this removes entries that are freed.
! for (int i = _deallocate_list->length() - 1; i >= 0; i--) {
! Metadata* m = _deallocate_list->at(i);
! if (!m->on_stack()) {
! _deallocate_list->remove_at(i);
! // There are only three types of metadata that we deallocate directly.
! // Cast them so they can be used by the template function.
! if (m->is_method()) {
! MetadataFactory::free_metadata(this, (Method*)m);
! } else if (m->is_constantPool()) {
! MetadataFactory::free_metadata(this, (ConstantPool*)m);
! } else if (m->is_klass()) {
! MetadataFactory::free_metadata(this, (InstanceKlass*)m);
! } else {
! ShouldNotReachHere();
}
} else {
! // Metadata is alive.
! // If scratch_class is on stack then it shouldn't be on this list!
! assert(!m->is_klass() || !((InstanceKlass*)m)->is_scratch_class(),
! "scratch classes on this list should be dead");
! // Also should assert that other metadata on the list was found in handles.
}
}
}
! // This is distinct from free_deallocate_list. For class loader data that are
! // unloading, this frees the C heap memory for constant pools on the list. If there
! // were C heap memory allocated for methods, it would free that too. The C heap memory
! // for InstanceKlasses on this list is freed in the ClassLoaderData destructor.
! void ClassLoaderData::unload_deallocate_list() {
! // Don't need lock, at safepoint
! assert(SafepointSynchronize::is_at_safepoint(), "only called at safepoint");
! assert(is_unloading(), "only called for ClassLoaderData that are unloading");
! if (_deallocate_list == NULL) {
! return;
! }
! // Go backwards because this removes entries that are freed.
! for (int i = _deallocate_list->length() - 1; i >= 0; i--) {
! Metadata* m = _deallocate_list->at(i);
! assert(!m->on_stack(), "wouldn't be unloading if this were so");
! _deallocate_list->remove_at(i);
! // Only constant pool entries have C heap memory to free.
! if (m->is_constantPool()) {
! ((ConstantPool*)m)->release_C_heap_structures();
}
}
}
// Class iterator used by the compiler. It gets some number of classes at
// a safepoint to decay invocation counters on the methods.
class ClassLoaderDataGraphKlassIteratorStatic {
+ friend class ClassLoaderData;
+ friend class ClassLoaderDataGraph;
+ private:
ClassLoaderData* _current_loader_data;
Klass* _current_class_entry;
InstanceKlass* try_get_next_class() {
assert(SafepointSynchronize::is_at_safepoint(), "only called at safepoint");
int max_classes = InstanceKlass::number_of_instance_classes();
assert(max_classes > 0, "should not be called with no instance classes");
*** 519,562 ****
void adjust_saved_class(Klass* klass) {
if (_current_class_entry == klass) {
_current_class_entry = klass->next_link();
}
}
};
static ClassLoaderDataGraphKlassIteratorStatic static_klass_iterator;
- InstanceKlass* ClassLoaderDataGraph::try_get_next_class() {
- return static_klass_iterator.try_get_next_class();
- }
-
-
- // Remove a klass from the _klasses list for scratch_class during redefinition
- // or parsed class in the case of an error.
- void ClassLoaderData::remove_class(Klass* scratch_class) {
- assert(SafepointSynchronize::is_at_safepoint(), "only called at safepoint");
-
- // Adjust global class iterator.
- static_klass_iterator.adjust_saved_class(scratch_class);
-
- Klass* prev = NULL;
- for (Klass* k = _klasses; k != NULL; k = k->next_link()) {
- if (k == scratch_class) {
- if (prev == NULL) {
- _klasses = k->next_link();
- } else {
- Klass* next = k->next_link();
- prev->set_next_link(next);
- }
- return;
- }
- prev = k;
- assert(k != k->next_link(), "no loops!");
- }
- ShouldNotReachHere(); // should have found this class!!
- }
-
void ClassLoaderData::unload() {
_unloading = true;
// Tell serviceability tools these classes are unloading
classes_do(InstanceKlass::notify_unload_class);
--- 476,492 ----
void adjust_saved_class(Klass* klass) {
if (_current_class_entry == klass) {
_current_class_entry = klass->next_link();
}
}
+
+ public:
+ ClassLoaderDataGraphKlassIteratorStatic() : _current_loader_data(NULL), _current_class_entry(NULL) {}
};
static ClassLoaderDataGraphKlassIteratorStatic static_klass_iterator;
void ClassLoaderData::unload() {
_unloading = true;
// Tell serviceability tools these classes are unloading
classes_do(InstanceKlass::notify_unload_class);
*** 580,719 ****
// Clean up global class iterator for compiler
static_klass_iterator.adjust_saved_class(this);
}
! ModuleEntryTable* ClassLoaderData::modules() {
! // Lazily create the module entry table at first request.
! // Lock-free access requires load_acquire.
! ModuleEntryTable* modules = OrderAccess::load_acquire(&_modules);
! if (modules == NULL) {
! MutexLocker m1(Module_lock);
! // Check if _modules got allocated while we were waiting for this lock.
! if ((modules = _modules) == NULL) {
! modules = new ModuleEntryTable(ModuleEntryTable::_moduletable_entry_size);
! {
! MutexLockerEx m1(metaspace_lock(), Mutex::_no_safepoint_check_flag);
! // Ensure _modules is stable, since it is examined without a lock
! OrderAccess::release_store(&_modules, modules);
}
}
}
- return modules;
}
! const int _boot_loader_dictionary_size = 1009;
! const int _default_loader_dictionary_size = 107;
!
! Dictionary* ClassLoaderData::create_dictionary() {
! assert(!is_anonymous(), "anonymous class loader data do not have a dictionary");
! int size;
! bool resizable = false;
! if (_the_null_class_loader_data == NULL) {
! size = _boot_loader_dictionary_size;
! resizable = true;
! } else if (class_loader()->is_a(SystemDictionary::reflect_DelegatingClassLoader_klass())) {
! size = 1; // there's only one class in relection class loader and no initiated classes
! } else if (is_system_class_loader_data()) {
! size = _boot_loader_dictionary_size;
! resizable = true;
! } else {
! size = _default_loader_dictionary_size;
! resizable = true;
}
- if (!DynamicallyResizeSystemDictionaries || DumpSharedSpaces || UseSharedSpaces) {
- resizable = false;
}
- return new Dictionary(this, size, resizable);
}
! // Unloading support
! oop ClassLoaderData::keep_alive_object() const {
! assert_locked_or_safepoint(_metaspace_lock);
! assert(!keep_alive(), "Don't use with CLDs that are artificially kept alive");
! return is_anonymous() ? _klasses->java_mirror() : class_loader();
}
! bool ClassLoaderData::is_alive(BoolObjectClosure* is_alive_closure) const {
! bool alive = keep_alive() // null class loader and incomplete anonymous klasses.
! || is_alive_closure->do_object_b(keep_alive_object());
!
! return alive;
}
! ClassLoaderData::~ClassLoaderData() {
! // Release C heap structures for all the classes.
! classes_do(InstanceKlass::release_C_heap_structures);
!
! // Release C heap allocated hashtable for all the packages.
if (_packages != NULL) {
! // Destroy the table itself
! delete _packages;
! _packages = NULL;
}
-
- // Release C heap allocated hashtable for all the modules.
- if (_modules != NULL) {
- // Destroy the table itself
- delete _modules;
- _modules = NULL;
}
-
- // Release C heap allocated hashtable for the dictionary
- if (_dictionary != NULL) {
- // Destroy the table itself
- delete _dictionary;
- _dictionary = NULL;
}
! if (_unnamed_module != NULL) {
! _unnamed_module->delete_unnamed_module();
! _unnamed_module = NULL;
}
! // release the metaspace
! Metaspace *m = _metaspace;
! if (m != NULL) {
! _metaspace = NULL;
! delete m;
! }
! // Clear all the JNI handles for methods
! // These aren't deallocated and are going to look like a leak, but that's
! // needed because we can't really get rid of jmethodIDs because we don't
! // know when native code is going to stop using them. The spec says that
! // they're "invalid" but existing programs likely rely on their being
! // NULL after class unloading.
! if (_jmethod_ids != NULL) {
! Method::clear_jmethod_ids(this);
}
- // Delete lock
- delete _metaspace_lock;
! // Delete free list
! if (_deallocate_list != NULL) {
! delete _deallocate_list;
! }
}
! // Returns true if this class loader data is for the system class loader.
! bool ClassLoaderData::is_system_class_loader_data() const {
! return SystemDictionary::is_system_class_loader(class_loader());
}
! // Returns true if this class loader data is for the platform class loader.
! bool ClassLoaderData::is_platform_class_loader_data() const {
! return SystemDictionary::is_platform_class_loader(class_loader());
}
! // Returns true if this class loader data is one of the 3 builtin
! // (boot, application/system or platform) class loaders. Note, the
! // builtin loaders are not freed by a GC.
! bool ClassLoaderData::is_builtin_class_loader_data() const {
! return (is_the_null_class_loader_data() ||
! SystemDictionary::is_system_class_loader(class_loader()) ||
! SystemDictionary::is_platform_class_loader(class_loader()));
}
Metaspace* ClassLoaderData::metaspace_non_null() {
// If the metaspace has not been allocated, create a new one. Might want
// to create smaller arena for Reflection class loaders also.
--- 510,645 ----
// Clean up global class iterator for compiler
static_klass_iterator.adjust_saved_class(this);
}
! void ClassLoaderData::classes_do(KlassClosure* klass_closure) {
! // Lock-free access requires load_acquire
! for (Klass* k = OrderAccess::load_acquire(&_klasses); k != NULL; k = k->next_link()) {
! klass_closure->do_klass(k);
! assert(k != k->next_link(), "no loops!");
! }
! }
! void ClassLoaderData::classes_do(void f(Klass * const)) {
! // Lock-free access requires load_acquire
! for (Klass* k = OrderAccess::load_acquire(&_klasses); k != NULL; k = k->next_link()) {
! f(k);
! assert(k != k->next_link(), "no loops!");
}
+ }
+
+ void ClassLoaderData::classes_do(void f(InstanceKlass*)) {
+ // Lock-free access requires load_acquire
+ for (Klass* k = OrderAccess::load_acquire(&_klasses); k != NULL; k = k->next_link()) {
+ if (k->is_instance_klass()) {
+ f(InstanceKlass::cast(k));
}
+ assert(k != k->next_link(), "no loops!");
}
}
! void ClassLoaderData::loaded_classes_do(KlassClosure* klass_closure) {
! // Lock-free access requires load_acquire
! for (Klass* k = OrderAccess::load_acquire(&_klasses); k != NULL; k = k->next_link()) {
! // Do not filter ArrayKlass oops here...
! if (k->is_array_klass() || (k->is_instance_klass() && InstanceKlass::cast(k)->is_loaded())) {
! klass_closure->do_klass(k);
}
}
}
! void ClassLoaderData::methods_do(void f(Method*)) {
! // Lock-free access requires load_acquire
! for (Klass* k = OrderAccess::load_acquire(&_klasses); k != NULL; k = k->next_link()) {
! if (k->is_instance_klass() && InstanceKlass::cast(k)->is_loaded()) {
! InstanceKlass::cast(k)->methods_do(f);
! }
! }
}
! void ClassLoaderData::modules_do(void f(ModuleEntry*)) {
! assert_locked_or_safepoint(Module_lock);
! if (_unnamed_module != NULL) {
! f(_unnamed_module);
! }
! if (_modules != NULL) {
! for (int i = 0; i < _modules->table_size(); i++) {
! for (ModuleEntry* entry = _modules->bucket(i);
! entry != NULL;
! entry = entry->next()) {
! f(entry);
! }
! }
! }
}
! void ClassLoaderData::packages_do(void f(PackageEntry*)) {
! assert_locked_or_safepoint(Module_lock);
if (_packages != NULL) {
! for (int i = 0; i < _packages->table_size(); i++) {
! for (PackageEntry* entry = _packages->bucket(i);
! entry != NULL;
! entry = entry->next()) {
! f(entry);
}
}
}
+ }
! void ClassLoaderData::oops_do(OopClosure* f, bool must_claim, bool clear_mod_oops) {
! if (must_claim && !claim()) {
! return;
}
! // Only clear modified_oops after the ClassLoaderData is claimed.
! if (clear_mod_oops) {
! clear_modified_oops();
}
! f->do_oop(&_class_loader);
! _dependencies.oops_do(f);
! _handles.oops_do(f);
}
! // Unloading support
! oop ClassLoaderData::keep_alive_object() const {
! assert_locked_or_safepoint(_metaspace_lock);
! assert(!keep_alive(), "Don't use with CLDs that are artificially kept alive");
! return is_anonymous() ? _klasses->java_mirror() : class_loader();
}
! bool ClassLoaderData::is_alive(BoolObjectClosure* is_alive_closure) const {
! return keep_alive() // null class loader and incomplete anonymous klasses.
! || is_alive_closure->do_object_b(keep_alive_object());
}
! // Anonymous classes have their own ClassLoaderData that is marked to keep alive
! // while the class is being parsed, and if the class appears on the module fixup list.
! // Due to the uniqueness that no other class shares the anonymous class' name or
! // ClassLoaderData, no other non-GC thread has knowledge of the anonymous class while
! // it is being defined, therefore _keep_alive is not volatile or atomic.
! void ClassLoaderData::inc_keep_alive() {
! if (is_anonymous()) {
! assert(_keep_alive >= 0, "Invalid keep alive increment count");
! _keep_alive++;
! }
! }
!
! void ClassLoaderData::dec_keep_alive() {
! if (is_anonymous()) {
! assert(_keep_alive > 0, "Invalid keep alive decrement count");
! _keep_alive--;
! }
! }
!
! bool ClassLoaderData::claim() {
! if (_claimed == 1) {
! return false;
! }
!
! return (int)Atomic::cmpxchg(1, &_claimed, 0) == 0;
}
Metaspace* ClassLoaderData::metaspace_non_null() {
// If the metaspace has not been allocated, create a new one. Might want
// to create smaller arena for Reflection class loaders also.
*** 724,734 ****
if (metaspace == NULL) {
MutexLockerEx ml(_metaspace_lock, Mutex::_no_safepoint_check_flag);
// Check if _metaspace got allocated while we were waiting for this lock.
if ((metaspace = _metaspace) == NULL) {
if (this == the_null_class_loader_data()) {
! assert (class_loader() == NULL, "Must be");
metaspace = new Metaspace(_metaspace_lock, Metaspace::BootMetaspaceType);
} else if (is_anonymous()) {
if (class_loader() != NULL) {
log_trace(class, loader, data)("is_anonymous: %s", class_loader()->klass()->internal_name());
}
--- 650,660 ----
if (metaspace == NULL) {
MutexLockerEx ml(_metaspace_lock, Mutex::_no_safepoint_check_flag);
// Check if _metaspace got allocated while we were waiting for this lock.
if ((metaspace = _metaspace) == NULL) {
if (this == the_null_class_loader_data()) {
! assert(class_loader() == NULL, "Must be");
metaspace = new Metaspace(_metaspace_lock, Metaspace::BootMetaspaceType);
} else if (is_anonymous()) {
if (class_loader() != NULL) {
log_trace(class, loader, data)("is_anonymous: %s", class_loader()->klass()->internal_name());
}
*** 746,755 ****
--- 672,725 ----
}
}
return metaspace;
}
+ // Returns true if this class loader data is for the system class loader.
+ bool ClassLoaderData::is_system_class_loader_data() const {
+ return SystemDictionary::is_system_class_loader(class_loader());
+ }
+
+ // Returns true if this class loader data is for the platform class loader.
+ bool ClassLoaderData::is_platform_class_loader_data() const {
+ return SystemDictionary::is_platform_class_loader(class_loader());
+ }
+
+ // Returns true if this class loader data is one of the 3 builtin
+ // (boot, application/system or platform) class loaders. Note, the
+ // builtin loaders are not freed by a GC.
+ bool ClassLoaderData::is_builtin_class_loader_data() const {
+ return (is_the_null_class_loader_data() ||
+ SystemDictionary::is_system_class_loader(class_loader()) ||
+ SystemDictionary::is_platform_class_loader(class_loader()));
+ }
+
+ const char* ClassLoaderData::loader_name() {
+ // Handles null class loader
+ return SystemDictionary::loader_name(class_loader());
+ }
+
+ ModuleEntryTable* ClassLoaderData::modules() {
+ // Lazily create the module entry table at first request.
+ // Lock-free access requires load_acquire.
+ ModuleEntryTable* modules = OrderAccess::load_acquire(&_modules);
+ if (modules == NULL) {
+ MutexLocker m1(Module_lock);
+ // Check if _modules got allocated while we were waiting for this lock.
+ if ((modules = _modules) == NULL) {
+ modules = new ModuleEntryTable(ModuleEntryTable::_moduletable_entry_size);
+
+ {
+ MutexLockerEx m1(metaspace_lock(), Mutex::_no_safepoint_check_flag);
+ // Ensure _modules is stable, since it is examined without a lock
+ OrderAccess::release_store(&_modules, modules);
+ }
+ }
+ }
+ return modules;
+ }
+
OopHandle ClassLoaderData::add_handle(Handle h) {
MutexLockerEx ml(metaspace_lock(), Mutex::_no_safepoint_check_flag);
record_modified_oops();
return OopHandle(_handles.add(h()));
}
*** 781,870 ****
} else {
dest = _handles.add(h());
}
}
! // Add this metadata pointer to be freed when it's safe. This is only during
! // class unloading because Handles might point to this metadata field.
! void ClassLoaderData::add_to_deallocate_list(Metadata* m) {
! // Metadata in shared region isn't deleted.
! if (!m->is_shared()) {
MutexLockerEx ml(metaspace_lock(), Mutex::_no_safepoint_check_flag);
! if (_deallocate_list == NULL) {
! _deallocate_list = new (ResourceObj::C_HEAP, mtClass) GrowableArray<Metadata*>(100, true);
}
! _deallocate_list->append_if_missing(m);
}
}
! // Deallocate free metadata on the free list. How useful the PermGen was!
! void ClassLoaderData::free_deallocate_list() {
! // Don't need lock, at safepoint
assert(SafepointSynchronize::is_at_safepoint(), "only called at safepoint");
! assert(!is_unloading(), "only called for ClassLoaderData that are not unloading");
! if (_deallocate_list == NULL) {
! return;
! }
! // Go backwards because this removes entries that are freed.
! for (int i = _deallocate_list->length() - 1; i >= 0; i--) {
! Metadata* m = _deallocate_list->at(i);
! if (!m->on_stack()) {
! _deallocate_list->remove_at(i);
! // There are only three types of metadata that we deallocate directly.
! // Cast them so they can be used by the template function.
! if (m->is_method()) {
! MetadataFactory::free_metadata(this, (Method*)m);
! } else if (m->is_constantPool()) {
! MetadataFactory::free_metadata(this, (ConstantPool*)m);
! } else if (m->is_klass()) {
! MetadataFactory::free_metadata(this, (InstanceKlass*)m);
} else {
! ShouldNotReachHere();
}
! } else {
! // Metadata is alive.
! // If scratch_class is on stack then it shouldn't be on this list!
! assert(!m->is_klass() || !((InstanceKlass*)m)->is_scratch_class(),
! "scratch classes on this list should be dead");
! // Also should assert that other metadata on the list was found in handles.
}
}
}
! // This is distinct from free_deallocate_list. For class loader data that are
! // unloading, this frees the C heap memory for constant pools on the list. If there
! // were C heap memory allocated for methods, it would free that too. The C heap memory
! // for InstanceKlasses on this list is freed in the ClassLoaderData destructor.
! void ClassLoaderData::unload_deallocate_list() {
! // Don't need lock, at safepoint
! assert(SafepointSynchronize::is_at_safepoint(), "only called at safepoint");
! assert(is_unloading(), "only called for ClassLoaderData that are unloading");
! if (_deallocate_list == NULL) {
return;
}
! // Go backwards because this removes entries that are freed.
! for (int i = _deallocate_list->length() - 1; i >= 0; i--) {
! Metadata* m = _deallocate_list->at(i);
! assert (!m->on_stack(), "wouldn't be unloading if this were so");
! _deallocate_list->remove_at(i);
! // Only constant pool entries have C heap memory to free.
! if (m->is_constantPool()) {
! ((ConstantPool*)m)->release_C_heap_structures();
}
}
- }
! // These anonymous class loaders are to contain classes used for JSR292
! ClassLoaderData* ClassLoaderData::anonymous_class_loader_data(oop loader, TRAPS) {
! // Add a new class loader data to the graph.
! Handle lh(THREAD, loader);
! return ClassLoaderDataGraph::add(lh, true, THREAD);
}
! const char* ClassLoaderData::loader_name() {
! // Handles null class loader
! return SystemDictionary::loader_name(class_loader());
}
#ifndef PRODUCT
// Define to dump klasses
#undef CLD_DUMP_KLASSES
--- 751,870 ----
} else {
dest = _handles.add(h());
}
}
! void ClassLoaderData::add_class(Klass* k, bool publicize /* true */) {
! {
MutexLockerEx ml(metaspace_lock(), Mutex::_no_safepoint_check_flag);
! Klass* old_value = _klasses;
! k->set_next_link(old_value);
! // Link the new item into the list, making sure the linked class is stable
! // since the list can be walked without a lock
! OrderAccess::release_store(&_klasses, k);
}
!
! if (publicize && k->class_loader_data() != NULL) {
! ResourceMark rm;
! log_trace(class, loader, data)("Adding k: " PTR_FORMAT " %s to CLD: "
! PTR_FORMAT " loader: " PTR_FORMAT " %s",
! p2i(k),
! k->external_name(),
! p2i(k->class_loader_data()),
! p2i((void *)k->class_loader()),
! loader_name());
}
}
! // Remove a klass from the _klasses list for scratch_class during redefinition
! // or parsed class in the case of an error.
! void ClassLoaderData::remove_class(Klass* scratch_class) {
assert(SafepointSynchronize::is_at_safepoint(), "only called at safepoint");
!
! // Adjust global class iterator.
! static_klass_iterator.adjust_saved_class(scratch_class);
!
! Klass* prev = NULL;
! for (Klass* k = _klasses; k != NULL; k = k->next_link()) {
! if (k == scratch_class) {
! if (prev == NULL) {
! _klasses = k->next_link();
} else {
! Klass* next = k->next_link();
! prev->set_next_link(next);
}
! return;
}
+ prev = k;
+ assert(k != k->next_link(), "no loops!");
}
+ ShouldNotReachHere(); // should have found this class!!
}
! bool ClassLoaderData::contains_klass(Klass* klass) {
! // Lock-free access requires load_acquire
! for (Klass* k = OrderAccess::load_acquire(&_klasses); k != NULL; k = k->next_link()) {
! if (k == klass) return true;
! }
! return false;
! }
!
! void ClassLoaderData::record_dependency(const Klass* k, TRAPS) {
! assert(k != NULL, "invariant");
!
! ClassLoaderData * const from_cld = this;
! ClassLoaderData * const to_cld = k->class_loader_data();
!
! // Dependency to the null class loader data doesn't need to be recorded
! // because the null class loader data never goes away.
! if (to_cld->is_the_null_class_loader_data()) {
return;
}
!
! oop to;
! if (to_cld->is_anonymous()) {
! // Anonymous class dependencies are through the mirror.
! to = k->java_mirror();
! } else {
! to = to_cld->class_loader();
!
! // If from_cld is anonymous, even if it's class_loader is a parent of 'to'
! // we still have to add it. The class_loader won't keep from_cld alive.
! if (!from_cld->is_anonymous()) {
! // Check that this dependency isn't from the same or parent class_loader
! oop from = from_cld->class_loader();
!
! oop curr = from;
! while (curr != NULL) {
! if (curr == to) {
! return; // this class loader is in the parent list, no need to add it.
! }
! curr = java_lang_ClassLoader::parent(curr);
! }
}
}
! // It's a dependency we won't find through GC, add it. This is relatively rare
! // Must handle over GC point.
! Handle dependency(THREAD, to);
! from_cld->_dependencies.add(dependency, CHECK);
!
! // Added a potentially young gen oop to the ClassLoaderData
! record_modified_oops();
}
! // Add this metadata pointer to be freed when it's safe. This is only during
! // class unloading because Handles might point to this metadata field.
! void ClassLoaderData::add_to_deallocate_list(Metadata* m) {
! // Metadata in shared region isn't deleted.
! if (!m->is_shared()) {
! MutexLockerEx ml(metaspace_lock(), Mutex::_no_safepoint_check_flag);
! if (_deallocate_list == NULL) {
! _deallocate_list = new (ResourceObj::C_HEAP, mtClass) GrowableArray<Metadata*>(100, true);
! }
! _deallocate_list->append_if_missing(m);
! }
}
#ifndef PRODUCT
// Define to dump klasses
#undef CLD_DUMP_KLASSES
*** 897,907 ****
if (_jmethod_ids != NULL) {
Method::print_jmethod_ids(this, out);
}
out->print_cr("}");
}
- #endif // PRODUCT
void ClassLoaderData::verify() {
assert_locked_or_safepoint(_metaspace_lock);
oop cl = class_loader();
--- 897,906 ----
*** 918,933 ****
k->verify();
assert(k != k->next_link(), "no loops!");
}
}
! bool ClassLoaderData::contains_klass(Klass* klass) {
! // Lock-free access requires load_acquire
! for (Klass* k = OrderAccess::load_acquire(&_klasses); k != NULL; k = k->next_link()) {
! if (k == klass) return true;
}
- return false;
}
// GC root of class loader data created.
ClassLoaderData* ClassLoaderDataGraph::_head = NULL;
--- 917,944 ----
k->verify();
assert(k != k->next_link(), "no loops!");
}
}
! #endif // !PRODUCT
!
! void ClassLoaderData::print_value_on(outputStream* out) const {
! if (class_loader() == NULL) {
! out->print("NULL class loader");
! } else {
! out->print("class loader " INTPTR_FORMAT " ", p2i(this));
! class_loader()->print_value_on(out);
! }
! }
!
! void ClassLoaderData::print_on(outputStream* out) const {
! if (class_loader() == NULL) {
! out->print("NULL class loader");
! } else {
! out->print("class loader " INTPTR_FORMAT " ", p2i(this));
! class_loader()->print_on(out);
}
}
// GC root of class loader data created.
ClassLoaderData* ClassLoaderDataGraph::_head = NULL;
*** 936,945 ****
--- 947,985 ----
ClassLoaderData* ClassLoaderDataGraph::_saved_head = NULL;
bool ClassLoaderDataGraph::_should_purge = false;
bool ClassLoaderDataGraph::_metaspace_oom = false;
+ static void print_creation(outputStream* out, Handle loader, ClassLoaderData* cld, TRAPS) {
+ Handle string;
+ if (loader.not_null()) {
+ // Include the result of loader.toString() in the output. This allows
+ // the user of the log to identify the class loader instance.
+ JavaValue result(T_OBJECT);
+ Klass* spec_klass = SystemDictionary::ClassLoader_klass();
+ JavaCalls::call_virtual(&result,
+ loader,
+ spec_klass,
+ vmSymbols::toString_name(),
+ vmSymbols::void_string_signature(),
+ CHECK);
+ assert(result.get_type() == T_OBJECT, "just checking");
+ string = Handle(THREAD, (oop)result.get_jobject());
+ }
+
+ ResourceMark rm;
+ out->print("create class loader data " INTPTR_FORMAT, p2i(cld));
+ out->print(" for instance " INTPTR_FORMAT " of %s", p2i((void *)cld->class_loader()),
+ cld->loader_name());
+
+ if (string.not_null()) {
+ out->print(": ");
+ java_lang_String::print(string(), out);
+ }
+ out->cr();
+ }
+
// Add a new class loader data node to the list. Assign the newly created
// ClassLoaderData into the java/lang/ClassLoader object as a hidden field
ClassLoaderData* ClassLoaderDataGraph::add(Handle loader, bool is_anonymous, TRAPS) {
// We need to allocate all the oops for the ClassLoaderData before allocating the
// actual ClassLoaderData object.
*** 982,1021 ****
}
next = exchanged;
} while (true);
}
- void ClassLoaderDataGraph::print_creation(outputStream* out, Handle loader, ClassLoaderData* cld, TRAPS) {
- Handle string;
- if (loader.not_null()) {
- // Include the result of loader.toString() in the output. This allows
- // the user of the log to identify the class loader instance.
- JavaValue result(T_OBJECT);
- Klass* spec_klass = SystemDictionary::ClassLoader_klass();
- JavaCalls::call_virtual(&result,
- loader,
- spec_klass,
- vmSymbols::toString_name(),
- vmSymbols::void_string_signature(),
- CHECK);
- assert(result.get_type() == T_OBJECT, "just checking");
- string = Handle(THREAD, (oop)result.get_jobject());
- }
-
- ResourceMark rm;
- out->print("create class loader data " INTPTR_FORMAT, p2i(cld));
- out->print(" for instance " INTPTR_FORMAT " of %s", p2i((void *)cld->class_loader()),
- cld->loader_name());
-
- if (string.not_null()) {
- out->print(": ");
- java_lang_String::print(string(), out);
- }
- out->cr();
- }
-
-
void ClassLoaderDataGraph::oops_do(OopClosure* f, bool must_claim) {
for (ClassLoaderData* cld = _head; cld != NULL; cld = cld->next()) {
cld->oops_do(f, must_claim);
}
}
--- 1022,1031 ----
*** 1224,1245 ****
}
}
return false;
}
! #ifndef PRODUCT
! bool ClassLoaderDataGraph::contains_loader_data(ClassLoaderData* loader_data) {
! for (ClassLoaderData* data = _head; data != NULL; data = data->next()) {
! if (loader_data == data) {
! return true;
}
}
!
! return false;
}
- #endif // PRODUCT
-
// Move class loader data from main list to the unloaded list for unloading
// and deallocation later.
bool ClassLoaderDataGraph::do_unloading(BoolObjectClosure* is_alive_closure,
bool clean_previous_versions) {
--- 1234,1267 ----
}
}
return false;
}
! #if INCLUDE_TRACE
! static Ticks class_unload_time;
! static void post_class_unload_event(Klass* const k) {
! assert(k != NULL, "invariant");
! EventClassUnload event(UNTIMED);
! event.set_endtime(class_unload_time);
! event.set_unloadedClass(k);
! event.set_definingClassLoader(k->class_loader_data());
! event.commit();
! }
! #endif // INCLUDE_TRACE
!
! static void post_class_unload_events() {
! #if INCLUDE_TRACE
! assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint!");
! if (Tracing::enabled()) {
! if (Tracing::is_event_enabled(TraceClassUnloadEvent)) {
! class_unload_time = Ticks::now();
! ClassLoaderDataGraph::classes_unloading_do(&post_class_unload_event);
}
+ Tracing::on_unloading_classes();
}
! #endif // INCLUDE_TRACE
}
// Move class loader data from main list to the unloaded list for unloading
// and deallocation later.
bool ClassLoaderDataGraph::do_unloading(BoolObjectClosure* is_alive_closure,
bool clean_previous_versions) {
*** 1335,1344 ****
--- 1357,1372 ----
Metaspace::purge();
set_metaspace_oom(false);
}
}
+ void ClassLoaderDataGraph::clear_claimed_marks() {
+ for (ClassLoaderData* cld = _head; cld != NULL; cld = cld->next()) {
+ cld->clear_claimed();
+ }
+ }
+
int ClassLoaderDataGraph::resize_if_needed() {
assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint!");
int resized = 0;
if (Dictionary::does_any_dictionary_needs_resizing()) {
FOR_ALL_DICTIONARY(cld) {
*** 1348,1371 ****
}
}
return resized;
}
! void ClassLoaderDataGraph::post_class_unload_events() {
! #if INCLUDE_TRACE
! assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint!");
! if (Tracing::enabled()) {
! if (Tracing::is_event_enabled(TraceClassUnloadEvent)) {
! assert(_unloading != NULL, "need class loader data unload list!");
! _class_unload_time = Ticks::now();
! classes_unloading_do(&class_unload_event);
}
! Tracing::on_unloading_classes();
}
! #endif
}
ClassLoaderDataGraphKlassIteratorAtomic::ClassLoaderDataGraphKlassIteratorAtomic()
: _next_klass(NULL) {
ClassLoaderData* cld = ClassLoaderDataGraph::_head;
Klass* klass = NULL;
--- 1376,1420 ----
}
}
return resized;
}
! InstanceKlass* ClassLoaderDataGraph::try_get_next_class() {
! return static_klass_iterator.try_get_next_class();
! }
!
! #ifndef PRODUCT
! void ClassLoaderDataGraph::verify() {
! for (ClassLoaderData* data = _head; data != NULL; data = data->next()) {
! data->verify();
}
! }
!
! void ClassLoaderDataGraph::dump_on(outputStream * const out) {
! for (ClassLoaderData* data = _head; data != NULL; data = data->next()) {
! data->dump(out);
}
! MetaspaceAux::dump(out);
! }
!
! bool ClassLoaderDataGraph::contains_loader_data(ClassLoaderData* loader_data) {
! for (ClassLoaderData* data = _head; data != NULL; data = data->next()) {
! if (loader_data == data) {
! return true;
! }
! }
! return false;
}
+ // callable from debugger
+ extern "C" int print_loader_data_graph() {
+ ClassLoaderDataGraph::dump_on(tty);
+ return 0;
+ }
+
+ #endif // !PRODUCT
+
ClassLoaderDataGraphKlassIteratorAtomic::ClassLoaderDataGraphKlassIteratorAtomic()
: _next_klass(NULL) {
ClassLoaderData* cld = ClassLoaderDataGraph::_head;
Klass* klass = NULL;
*** 1419,1484 ****
// Nothing more for the iterator to hand out.
assert(head == NULL, "head is " PTR_FORMAT ", expected not null:", p2i(head));
return NULL;
}
! ClassLoaderDataGraphMetaspaceIterator::ClassLoaderDataGraphMetaspaceIterator() {
! _data = ClassLoaderDataGraph::_head;
! }
!
! ClassLoaderDataGraphMetaspaceIterator::~ClassLoaderDataGraphMetaspaceIterator() {}
!
! #ifndef PRODUCT
! // callable from debugger
! extern "C" int print_loader_data_graph() {
! ClassLoaderDataGraph::dump_on(tty);
! return 0;
! }
!
! void ClassLoaderDataGraph::verify() {
! for (ClassLoaderData* data = _head; data != NULL; data = data->next()) {
! data->verify();
! }
! }
!
! void ClassLoaderDataGraph::dump_on(outputStream * const out) {
! for (ClassLoaderData* data = _head; data != NULL; data = data->next()) {
! data->dump(out);
! }
! MetaspaceAux::dump(out);
! }
! #endif // PRODUCT
!
! void ClassLoaderData::print_value_on(outputStream* out) const {
! if (class_loader() == NULL) {
! out->print("NULL class loader");
! } else {
! out->print("class loader " INTPTR_FORMAT " ", p2i(this));
! class_loader()->print_value_on(out);
! }
}
-
- void ClassLoaderData::print_on(outputStream* out) const {
- if (class_loader() == NULL) {
- out->print("NULL class loader");
- } else {
- out->print("class loader " INTPTR_FORMAT " ", p2i(this));
- class_loader()->print_on(out);
- }
- }
-
- #if INCLUDE_TRACE
-
- Ticks ClassLoaderDataGraph::_class_unload_time;
-
- void ClassLoaderDataGraph::class_unload_event(Klass* const k) {
- assert(k != NULL, "invariant");
-
- // post class unload event
- EventClassUnload event(UNTIMED);
- event.set_endtime(_class_unload_time);
- event.set_unloadedClass(k);
- event.set_definingClassLoader(k->class_loader_data());
- event.commit();
- }
-
- #endif // INCLUDE_TRACE
--- 1468,1475 ----
// Nothing more for the iterator to hand out.
assert(head == NULL, "head is " PTR_FORMAT ", expected not null:", p2i(head));
return NULL;
}
! ClassLoaderDataGraphMetaspaceIterator::ClassLoaderDataGraphMetaspaceIterator() :
! _data(ClassLoaderDataGraph::_head) {
}
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