39 // The System Dictionary and related data structures (e.g., placeholder table,
  40 // loader constraints table) as well as the runtime representation of classes
  41 // only reference ClassLoaderData.
  42 //
  43 // Instances of java.lang.ClassLoader holds a pointer to a ClassLoaderData that
  44 // that represent the loader's "linking domain" in the JVM.
  45 //
  46 // The bootstrap loader (represented by NULL) also has a ClassLoaderData,
  47 // the singleton class the_null_class_loader_data().
  48 
  49 #include "precompiled.hpp"
  50 #include "classfile/classLoaderData.hpp"
  51 #include "classfile/classLoaderData.inline.hpp"
  52 #include "classfile/dictionary.hpp"
  53 #include "classfile/javaClasses.hpp"
  54 #include "classfile/metadataOnStackMark.hpp"
  55 #include "classfile/moduleEntry.hpp"
  56 #include "classfile/packageEntry.hpp"
  57 #include "classfile/systemDictionary.hpp"
  58 #include "code/codeCache.hpp"
  59 #include "gc/shared/gcLocker.hpp"
  60 #include "logging/log.hpp"
  61 #include "logging/logStream.hpp"
  62 #include "memory/allocation.inline.hpp"
  63 #include "memory/metadataFactory.hpp"
  64 #include "memory/metaspaceShared.hpp"
  65 #include "memory/oopFactory.hpp"
  66 #include "memory/resourceArea.hpp"
  67 #include "oops/access.inline.hpp"
  68 #include "oops/objArrayOop.inline.hpp"
  69 #include "oops/oop.inline.hpp"
  70 #include "runtime/atomic.hpp"
  71 #include "runtime/handles.inline.hpp"
  72 #include "runtime/javaCalls.hpp"
  73 #include "runtime/jniHandles.hpp"
  74 #include "runtime/mutex.hpp"
  75 #include "runtime/orderAccess.hpp"
  76 #include "runtime/safepoint.hpp"

  77 #include "runtime/synchronizer.hpp"
  78 #include "utilities/growableArray.hpp"
  79 #include "utilities/macros.hpp"
  80 #include "utilities/ostream.hpp"
  81 #if INCLUDE_TRACE
  82 #include "trace/tracing.hpp"
  83 #endif
  84 
  85 volatile size_t ClassLoaderDataGraph::_num_array_classes = 0;
  86 volatile size_t ClassLoaderDataGraph::_num_instance_classes = 0;
  87 
  88 ClassLoaderData * ClassLoaderData::_the_null_class_loader_data = NULL;
  89 
  90 void ClassLoaderData::init_null_class_loader_data() {
  91   assert(_the_null_class_loader_data == NULL, "cannot initialize twice");
  92   assert(ClassLoaderDataGraph::_head == NULL, "cannot initialize twice");
  93 
  94   _the_null_class_loader_data = new ClassLoaderData(Handle(), false);
  95   ClassLoaderDataGraph::_head = _the_null_class_loader_data;
  96   assert(_the_null_class_loader_data->is_the_null_class_loader_data(), "Must be");

  39 // The System Dictionary and related data structures (e.g., placeholder table,
  40 // loader constraints table) as well as the runtime representation of classes
  41 // only reference ClassLoaderData.
  42 //
  43 // Instances of java.lang.ClassLoader holds a pointer to a ClassLoaderData that
  44 // that represent the loader's "linking domain" in the JVM.
  45 //
  46 // The bootstrap loader (represented by NULL) also has a ClassLoaderData,
  47 // the singleton class the_null_class_loader_data().
  48 
  49 #include "precompiled.hpp"
  50 #include "classfile/classLoaderData.hpp"
  51 #include "classfile/classLoaderData.inline.hpp"
  52 #include "classfile/dictionary.hpp"
  53 #include "classfile/javaClasses.hpp"
  54 #include "classfile/metadataOnStackMark.hpp"
  55 #include "classfile/moduleEntry.hpp"
  56 #include "classfile/packageEntry.hpp"
  57 #include "classfile/systemDictionary.hpp"
  58 #include "code/codeCache.hpp"

  59 #include "logging/log.hpp"
  60 #include "logging/logStream.hpp"
  61 #include "memory/allocation.inline.hpp"
  62 #include "memory/metadataFactory.hpp"
  63 #include "memory/metaspaceShared.hpp"
  64 #include "memory/oopFactory.hpp"
  65 #include "memory/resourceArea.hpp"
  66 #include "oops/access.inline.hpp"
  67 #include "oops/objArrayOop.inline.hpp"
  68 #include "oops/oop.inline.hpp"
  69 #include "runtime/atomic.hpp"
  70 #include "runtime/handles.inline.hpp"
  71 #include "runtime/javaCalls.hpp"
  72 #include "runtime/jniHandles.hpp"
  73 #include "runtime/mutex.hpp"
  74 #include "runtime/orderAccess.hpp"
  75 #include "runtime/safepoint.hpp"
  76 #include "runtime/safepointVerifiers.hpp"
  77 #include "runtime/synchronizer.hpp"
  78 #include "utilities/growableArray.hpp"
  79 #include "utilities/macros.hpp"
  80 #include "utilities/ostream.hpp"
  81 #if INCLUDE_TRACE
  82 #include "trace/tracing.hpp"
  83 #endif
  84 
  85 volatile size_t ClassLoaderDataGraph::_num_array_classes = 0;
  86 volatile size_t ClassLoaderDataGraph::_num_instance_classes = 0;
  87 
  88 ClassLoaderData * ClassLoaderData::_the_null_class_loader_data = NULL;
  89 
  90 void ClassLoaderData::init_null_class_loader_data() {
  91   assert(_the_null_class_loader_data == NULL, "cannot initialize twice");
  92   assert(ClassLoaderDataGraph::_head == NULL, "cannot initialize twice");
  93 
  94   _the_null_class_loader_data = new ClassLoaderData(Handle(), false);
  95   ClassLoaderDataGraph::_head = _the_null_class_loader_data;
  96   assert(_the_null_class_loader_data->is_the_null_class_loader_data(), "Must be");