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hotspot/src/share/vm/oops/arrayKlass.cpp
changeset 13952 e3cf184080bc
parent 13728 882756847a04
child 14488 ab48109f7d1b
equal deleted inserted replaced
13918:b01a48301e67 13952:e3cf184080bc 
    34 #include "oops/arrayOop.hpp"
 
    34 #include "oops/arrayOop.hpp"
 
    35 #include "oops/instanceKlass.hpp"
 
    35 #include "oops/instanceKlass.hpp"
 
    36 #include "oops/objArrayOop.hpp"
 
    36 #include "oops/objArrayOop.hpp"
 
    37 #include "oops/oop.inline.hpp"
 
    37 #include "oops/oop.inline.hpp"
 
    38 
    38 
    39 int arrayKlass::static_size(int header_size) {
 
    39 int ArrayKlass::static_size(int header_size) {
 
    40   // size of an array klass object
 
    40   // size of an array klass object
 
    41   assert(header_size <= InstanceKlass::header_size(), "bad header size");
 
    41   assert(header_size <= InstanceKlass::header_size(), "bad header size");
 
    42   // If this assert fails, see comments in base_create_array_klass.
 
    42   // If this assert fails, see comments in base_create_array_klass.
 
    43   header_size = InstanceKlass::header_size();
 
    43   header_size = InstanceKlass::header_size();
 
    44   int vtable_len = Universe::base_vtable_size();
 
    44   int vtable_len = Universe::base_vtable_size();
 
    49 #endif
 
    49 #endif
 
    50   return align_object_size(size);
 
    50   return align_object_size(size);
 
    51 }
 
    51 }
 
    52 
    52 
    53 
    53 
    54 Klass* arrayKlass::java_super() const {
 
    54 Klass* ArrayKlass::java_super() const {
 
    55   if (super() == NULL)  return NULL;  // bootstrap case
 
    55   if (super() == NULL)  return NULL;  // bootstrap case
 
    56   // Array klasses have primary supertypes which are not reported to Java.
 
    56   // Array klasses have primary supertypes which are not reported to Java.
 
    57   // Example super chain:  String[][] -> Object[][] -> Object[] -> Object
 
    57   // Example super chain:  String[][] -> Object[][] -> Object[] -> Object
 
    58   return SystemDictionary::Object_klass();
 
    58   return SystemDictionary::Object_klass();
 
    59 }
 
    59 }
 
    60 
    60 
    61 
    61 
    62 oop arrayKlass::multi_allocate(int rank, jint* sizes, TRAPS) {
 
    62 oop ArrayKlass::multi_allocate(int rank, jint* sizes, TRAPS) {
 
    63   ShouldNotReachHere();
 
    63   ShouldNotReachHere();
 
    64   return NULL;
 
    64   return NULL;
 
    65 }
 
    65 }
 
    66 
    66 
    67 Method* arrayKlass::uncached_lookup_method(Symbol* name, Symbol* signature) const {
 
    67 Method* ArrayKlass::uncached_lookup_method(Symbol* name, Symbol* signature) const {
 
    68   // There are no methods in an array klass but the super class (Object) has some
 
    68   // There are no methods in an array klass but the super class (Object) has some
 
    69   assert(super(), "super klass must be present");
 
    69   assert(super(), "super klass must be present");
 
    70   return Klass::cast(super())->uncached_lookup_method(name, signature);
 
    70   return Klass::cast(super())->uncached_lookup_method(name, signature);
 
    71 }
 
    71 }
 
    72 
    72 
    73 arrayKlass::arrayKlass(Symbol* name) {
 
    73 ArrayKlass::ArrayKlass(Symbol* name) {
 
    74   set_alloc_size(0);
 
    74   set_alloc_size(0);
 
    75   set_name(name);
 
    75   set_name(name);
 
    76 
    76 
    77   set_super(Universe::is_bootstrapping() ? (Klass*)NULL : SystemDictionary::Object_klass());
 
    77   set_super(Universe::is_bootstrapping() ? (Klass*)NULL : SystemDictionary::Object_klass());
 
    78   set_layout_helper(Klass::_lh_neutral_value);
 
    78   set_layout_helper(Klass::_lh_neutral_value);
 
    87   set_is_cloneable(); // All arrays are considered to be cloneable (See JLS 20.1.5)
 
    87   set_is_cloneable(); // All arrays are considered to be cloneable (See JLS 20.1.5)
 
    88 }
 
    88 }
 
    89 
    89 
    90 
    90 
    91 // Initialization of vtables and mirror object is done separatly from base_create_array_klass,
 
    91 // Initialization of vtables and mirror object is done separatly from base_create_array_klass,
 
    92 // since a GC can happen. At this point all instance variables of the arrayKlass must be setup.
 
    92 // since a GC can happen. At this point all instance variables of the ArrayKlass must be setup.
 
    93 void arrayKlass::complete_create_array_klass(arrayKlass* k, KlassHandle super_klass, TRAPS) {
 
    93 void ArrayKlass::complete_create_array_klass(ArrayKlass* k, KlassHandle super_klass, TRAPS) {
 
    94   ResourceMark rm(THREAD);
 
    94   ResourceMark rm(THREAD);
 
    95   k->initialize_supers(super_klass(), CHECK);
 
    95   k->initialize_supers(super_klass(), CHECK);
 
    96   k->vtable()->initialize_vtable(false, CHECK);
 
    96   k->vtable()->initialize_vtable(false, CHECK);
 
    97   java_lang_Class::create_mirror(k, CHECK);
 
    97   java_lang_Class::create_mirror(k, CHECK);
 
    98 }
 
    98 }
 
    99 
    99 
   100 GrowableArray<Klass*>* arrayKlass::compute_secondary_supers(int num_extra_slots) {
 
   100 GrowableArray<Klass*>* ArrayKlass::compute_secondary_supers(int num_extra_slots) {
 
   101   // interfaces = { cloneable_klass, serializable_klass };
 
   101   // interfaces = { cloneable_klass, serializable_klass };
 
   102   assert(num_extra_slots == 0, "sanity of primitive array type");
 
   102   assert(num_extra_slots == 0, "sanity of primitive array type");
 
   103   // Must share this for correct bootstrapping!
 
   103   // Must share this for correct bootstrapping!
 
   104   set_secondary_supers(Universe::the_array_interfaces_array());
 
   104   set_secondary_supers(Universe::the_array_interfaces_array());
 
   105   return NULL;
 
   105   return NULL;
 
   106 }
 
   106 }
 
   107 
   107 
   108 bool arrayKlass::compute_is_subtype_of(Klass* k) {
 
   108 bool ArrayKlass::compute_is_subtype_of(Klass* k) {
 
   109   // An array is a subtype of Serializable, Clonable, and Object
 
   109   // An array is a subtype of Serializable, Clonable, and Object
 
   110   return    k == SystemDictionary::Object_klass()
 
   110   return    k == SystemDictionary::Object_klass()
 
   111          || k == SystemDictionary::Cloneable_klass()
 
   111          || k == SystemDictionary::Cloneable_klass()
 
   112          || k == SystemDictionary::Serializable_klass();
 
   112          || k == SystemDictionary::Serializable_klass();
 
   113 }
 
   113 }
 
   114 
   114 
   115 
   115 
   116 inline intptr_t* arrayKlass::start_of_vtable() const {
 
   116 inline intptr_t* ArrayKlass::start_of_vtable() const {
 
   117   // all vtables start at the same place, that's why we use InstanceKlass::header_size here
 
   117   // all vtables start at the same place, that's why we use InstanceKlass::header_size here
 
   118   return ((intptr_t*)this) + InstanceKlass::header_size();
 
   118   return ((intptr_t*)this) + InstanceKlass::header_size();
 
   119 }
 
   119 }
 
   120 
   120 
   121 
   121 
   122 klassVtable* arrayKlass::vtable() const {
 
   122 klassVtable* ArrayKlass::vtable() const {
 
   123   KlassHandle kh(Thread::current(), this);
 
   123   KlassHandle kh(Thread::current(), this);
 
   124   return new klassVtable(kh, start_of_vtable(), vtable_length() / vtableEntry::size());
 
   124   return new klassVtable(kh, start_of_vtable(), vtable_length() / vtableEntry::size());
 
   125 }
 
   125 }
 
   126 
   126 
   127 
   127 
   128 objArrayOop arrayKlass::allocate_arrayArray(int n, int length, TRAPS) {
 
   128 objArrayOop ArrayKlass::allocate_arrayArray(int n, int length, TRAPS) {
 
   129   if (length < 0) {
 
   129   if (length < 0) {
 
   130     THROW_0(vmSymbols::java_lang_NegativeArraySizeException());
 
   130     THROW_0(vmSymbols::java_lang_NegativeArraySizeException());
 
   131   }
 
   131   }
 
   132   if (length > arrayOopDesc::max_array_length(T_ARRAY)) {
 
   132   if (length > arrayOopDesc::max_array_length(T_ARRAY)) {
 
   133     report_java_out_of_memory("Requested array size exceeds VM limit");
 
   133     report_java_out_of_memory("Requested array size exceeds VM limit");
 
   134     JvmtiExport::post_array_size_exhausted();
 
   134     JvmtiExport::post_array_size_exhausted();
 
   135     THROW_OOP_0(Universe::out_of_memory_error_array_size());
 
   135     THROW_OOP_0(Universe::out_of_memory_error_array_size());
 
   136   }
 
   136   }
 
   137   int size = objArrayOopDesc::object_size(length);
 
   137   int size = objArrayOopDesc::object_size(length);
 
   138   Klass* k = array_klass(n+dimension(), CHECK_0);
 
   138   Klass* k = array_klass(n+dimension(), CHECK_0);
 
   139   arrayKlass* ak = arrayKlass::cast(k);
 
   139   ArrayKlass* ak = ArrayKlass::cast(k);
 
   140   objArrayOop o =
 
   140   objArrayOop o =
 
   141     (objArrayOop)CollectedHeap::array_allocate(ak, size, length, CHECK_0);
 
   141     (objArrayOop)CollectedHeap::array_allocate(ak, size, length, CHECK_0);
 
   142   // initialization to NULL not necessary, area already cleared
 
   142   // initialization to NULL not necessary, area already cleared
 
   143   return o;
 
   143   return o;
 
   144 }
 
   144 }
 
   145 
   145 
   146 void arrayKlass::array_klasses_do(void f(Klass* k, TRAPS), TRAPS) {
 
   146 void ArrayKlass::array_klasses_do(void f(Klass* k, TRAPS), TRAPS) {
 
   147   Klass* k = this;
 
   147   Klass* k = this;
 
   148   // Iterate over this array klass and all higher dimensions
 
   148   // Iterate over this array klass and all higher dimensions
 
   149   while (k != NULL) {
 
   149   while (k != NULL) {
 
   150     f(k, CHECK);
 
   150     f(k, CHECK);
 
   151     k = arrayKlass::cast(k)->higher_dimension();
 
   151     k = ArrayKlass::cast(k)->higher_dimension();
 
   152   }
 
   152   }
 
   153 }
 
   153 }
 
   154 
   154 
   155 void arrayKlass::array_klasses_do(void f(Klass* k)) {
 
   155 void ArrayKlass::array_klasses_do(void f(Klass* k)) {
 
   156   Klass* k = this;
 
   156   Klass* k = this;
 
   157   // Iterate over this array klass and all higher dimensions
 
   157   // Iterate over this array klass and all higher dimensions
 
   158   while (k != NULL) {
 
   158   while (k != NULL) {
 
   159     f(k);
 
   159     f(k);
 
   160     k = arrayKlass::cast(k)->higher_dimension();
 
   160     k = ArrayKlass::cast(k)->higher_dimension();
 
   161   }
 
   161   }
 
   162 }
 
   162 }
 
   163 
   163 
   164 
   164 
   165 void arrayKlass::with_array_klasses_do(void f(Klass* k)) {
 
   165 void ArrayKlass::with_array_klasses_do(void f(Klass* k)) {
 
   166   array_klasses_do(f);
 
   166   array_klasses_do(f);
 
   167 }
 
   167 }
 
   168 
   168 
   169 
   169 
   170 // GC support
 
   170 // GC support
 
   171 
   171 
   172 void arrayKlass::oops_do(OopClosure* cl) {
 
   172 void ArrayKlass::oops_do(OopClosure* cl) {
 
   173   Klass::oops_do(cl);
 
   173   Klass::oops_do(cl);
 
   174 
   174 
   175   cl->do_oop(adr_component_mirror());
 
   175   cl->do_oop(adr_component_mirror());
 
   176 }
 
   176 }
 
   177 
   177 
   178 // JVM support
 
   178 // JVM support
 
   179 
   179 
   180 jint arrayKlass::compute_modifier_flags(TRAPS) const {
 
   180 jint ArrayKlass::compute_modifier_flags(TRAPS) const {
 
   181   return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
 
   181   return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
 
   182 }
 
   182 }
 
   183 
   183 
   184 // JVMTI support
 
   184 // JVMTI support
 
   185 
   185 
   186 jint arrayKlass::jvmti_class_status() const {
 
   186 jint ArrayKlass::jvmti_class_status() const {
 
   187   return JVMTI_CLASS_STATUS_ARRAY;
 
   187   return JVMTI_CLASS_STATUS_ARRAY;
 
   188 }
 
   188 }
 
   189 
   189 
   190 void arrayKlass::remove_unshareable_info() {
 
   190 void ArrayKlass::remove_unshareable_info() {
 
   191   Klass::remove_unshareable_info();
 
   191   Klass::remove_unshareable_info();
 
   192   // Clear the java mirror
 
   192   // Clear the java mirror
 
   193   set_component_mirror(NULL);
 
   193   set_component_mirror(NULL);
 
   194 }
 
   194 }
 
   195 
   195 
   196 void arrayKlass::restore_unshareable_info(TRAPS) {
 
   196 void ArrayKlass::restore_unshareable_info(TRAPS) {
 
   197   Klass::restore_unshareable_info(CHECK);
 
   197   Klass::restore_unshareable_info(CHECK);
 
   198   // Klass recreates the component mirror also
 
   198   // Klass recreates the component mirror also
 
   199 }
 
   199 }
 
   200 
   200 
   201 // Printing
 
   201 // Printing
 
   202 
   202 
   203 void arrayKlass::print_on(outputStream* st) const {
 
   203 void ArrayKlass::print_on(outputStream* st) const {
 
   204   assert(is_klass(), "must be klass");
 
   204   assert(is_klass(), "must be klass");
 
   205   Klass::print_on(st);
 
   205   Klass::print_on(st);
 
   206 }
 
   206 }
 
   207 
   207 
   208 void arrayKlass::print_value_on(outputStream* st) const {
 
   208 void ArrayKlass::print_value_on(outputStream* st) const {
 
   209   assert(is_klass(), "must be klass");
 
   209   assert(is_klass(), "must be klass");
 
   210   for(int index = 0; index < dimension(); index++) {
 
   210   for(int index = 0; index < dimension(); index++) {
 
   211     st->print("[]");
 
   211     st->print("[]");
 
   212   }
 
   212   }
 
   213 }
 
   213 }
 
   214 
   214 
   215 void arrayKlass::oop_print_on(oop obj, outputStream* st) {
 
   215 void ArrayKlass::oop_print_on(oop obj, outputStream* st) {
 
   216   assert(obj->is_array(), "must be array");
 
   216   assert(obj->is_array(), "must be array");
 
   217   Klass::oop_print_on(obj, st);
 
   217   Klass::oop_print_on(obj, st);
 
   218   st->print_cr(" - length: %d", arrayOop(obj)->length());
 
   218   st->print_cr(" - length: %d", arrayOop(obj)->length());
 
   219 }
 
   219 }
 
   220 
   220 
   221 
   221 
   222 // Verification
 
   222 // Verification
 
   223 
   223 
   224 void arrayKlass::verify_on(outputStream* st) {
 
   224 void ArrayKlass::verify_on(outputStream* st) {
 
   225   Klass::verify_on(st);
 
   225   Klass::verify_on(st);
 
   226 
   226 
   227   if (component_mirror() != NULL) {
 
   227   if (component_mirror() != NULL) {
 
   228     guarantee(component_mirror()->klass() != NULL, "should have a class");
 
   228     guarantee(component_mirror()->klass() != NULL, "should have a class");
 
   229   }
 
   229   }
 
   230 }
 
   230 }
 
   231 
   231 
   232 void arrayKlass::oop_verify_on(oop obj, outputStream* st) {
 
   232 void ArrayKlass::oop_verify_on(oop obj, outputStream* st) {
 
   233   guarantee(obj->is_array(), "must be array");
 
   233   guarantee(obj->is_array(), "must be array");
 
   234   arrayOop a = arrayOop(obj);
 
   234   arrayOop a = arrayOop(obj);
 
   235   guarantee(a->length() >= 0, "array with negative length?");
 
   235   guarantee(a->length() >= 0, "array with negative length?");
 
   236 }
 
   236 }
jdk-sandbox