Mercurial > jdk8-mips64-public > hotspot / file revision

 /*

  * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.

  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

  *

  * This code is free software; you can redistribute it and/or modify it

  * under the terms of the GNU General Public License version 2 only, as

  * published by the Free Software Foundation.

  *

  * This code is distributed in the hope that it will be useful, but WITHOUT

  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

  * version 2 for more details (a copy is included in the LICENSE file that

  * accompanied this code).

  *

  * You should have received a copy of the GNU General Public License version

  * 2 along with this work; if not, write to the Free Software Foundation,

  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

  *

  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

  * or visit www.oracle.com if you need additional information or have any

  * questions.

  *

  */

 #include "precompiled.hpp"

 #include "classfile/systemDictionary.hpp"

 #include "classfile/vmSymbols.hpp"

 #include "gc_interface/collectedHeap.hpp"

 #include "gc_interface/collectedHeap.inline.hpp"

 #include "memory/resourceArea.hpp"

 #include "memory/universe.hpp"

 #include "memory/universe.inline.hpp"

 #include "oops/instanceKlass.hpp"

 #include "oops/klassOop.hpp"

 #include "oops/objArrayKlassKlass.hpp"

 #include "oops/oop.inline.hpp"

 #include "oops/typeArrayKlass.hpp"

 #include "oops/typeArrayOop.hpp"

 #include "runtime/handles.inline.hpp"

 bool typeArrayKlass::compute_is_subtype_of(klassOop k) {

   if (!k->klass_part()->oop_is_typeArray()) {

     return arrayKlass::compute_is_subtype_of(k);

   }

   typeArrayKlass* tak = typeArrayKlass::cast(k);

   if (dimension() != tak->dimension()) return false;

   return element_type() == tak->element_type();

 }

 klassOop typeArrayKlass::create_klass(BasicType type, int scale,

                                       const char* name_str, TRAPS) {

   typeArrayKlass o;

   symbolHandle sym(symbolOop(NULL));

   // bootstrapping: don't create sym if symbolKlass not created yet

   if (Universe::symbolKlassObj() != NULL && name_str != NULL) {

     sym = oopFactory::new_symbol_handle(name_str, CHECK_NULL);

   }

   KlassHandle klassklass (THREAD, Universe::typeArrayKlassKlassObj());

   arrayKlassHandle k = base_create_array_klass(o.vtbl_value(), header_size(), klassklass, CHECK_NULL);

   typeArrayKlass* ak = typeArrayKlass::cast(k());

   ak->set_name(sym());

   ak->set_layout_helper(array_layout_helper(type));

   assert(scale == (1 << ak->log2_element_size()), "scale must check out");

   assert(ak->oop_is_javaArray(), "sanity");

   assert(ak->oop_is_typeArray(), "sanity");

   ak->set_max_length(arrayOopDesc::max_array_length(type));

   assert(k()->size() > header_size(), "bad size");

   // Call complete_create_array_klass after all instance variables have been initialized.

   KlassHandle super (THREAD, k->super());

   complete_create_array_klass(k, super, CHECK_NULL);

   return k();

 }

 typeArrayOop typeArrayKlass::allocate(int length, TRAPS) {

   assert(log2_element_size() >= 0, "bad scale");

   if (length >= 0) {

     if (length <= max_length()) {

       size_t size = typeArrayOopDesc::object_size(layout_helper(), length);

       KlassHandle h_k(THREAD, as_klassOop());

       typeArrayOop t;

       CollectedHeap* ch = Universe::heap();

       if (size < ch->large_typearray_limit()) {

         t = (typeArrayOop)CollectedHeap::array_allocate(h_k, (int)size, length, CHECK_NULL);

       } else {

         t = (typeArrayOop)CollectedHeap::large_typearray_allocate(h_k, (int)size, length, CHECK_NULL);

       }

       assert(t->is_parsable(), "Don't publish unless parsable");

       return t;

     } else {

       report_java_out_of_memory("Requested array size exceeds VM limit");

       THROW_OOP_0(Universe::out_of_memory_error_array_size());

     }

   } else {

     THROW_0(vmSymbols::java_lang_NegativeArraySizeException());

   }

 }

 typeArrayOop typeArrayKlass::allocate_permanent(int length, TRAPS) {

   if (length < 0) THROW_0(vmSymbols::java_lang_NegativeArraySizeException());

   int size = typeArrayOopDesc::object_size(layout_helper(), length);

   KlassHandle h_k(THREAD, as_klassOop());

   typeArrayOop t = (typeArrayOop)

     CollectedHeap::permanent_array_allocate(h_k, size, length, CHECK_NULL);

   assert(t->is_parsable(), "Can't publish until parsable");

   return t;

 }

 oop typeArrayKlass::multi_allocate(int rank, jint* last_size, TRAPS) {

   // For typeArrays this is only called for the last dimension

   assert(rank == 1, "just checking");

   int length = *last_size;

   return allocate(length, THREAD);

 }

 void typeArrayKlass::copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS) {

   assert(s->is_typeArray(), "must be type array");

   // Check destination

   if (!d->is_typeArray() || element_type() != typeArrayKlass::cast(d->klass())->element_type()) {

     THROW(vmSymbols::java_lang_ArrayStoreException());

   }

   // Check is all offsets and lengths are non negative

   if (src_pos < 0 || dst_pos < 0 || length < 0) {

     THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());

   }

   // Check if the ranges are valid

   if  ( (((unsigned int) length + (unsigned int) src_pos) > (unsigned int) s->length())

      || (((unsigned int) length + (unsigned int) dst_pos) > (unsigned int) d->length()) ) {

     THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());

   }

   // Check zero copy

   if (length == 0)

     return;

   // This is an attempt to make the copy_array fast.

   int l2es = log2_element_size();

   int ihs = array_header_in_bytes() / wordSize;

   char* src = (char*) ((oop*)s + ihs) + ((size_t)src_pos << l2es);

   char* dst = (char*) ((oop*)d + ihs) + ((size_t)dst_pos << l2es);

   Copy::conjoint_memory_atomic(src, dst, (size_t)length << l2es);

 }

 // create a klass of array holding typeArrays

 klassOop typeArrayKlass::array_klass_impl(bool or_null, int n, TRAPS) {

   typeArrayKlassHandle h_this(THREAD, as_klassOop());

   return array_klass_impl(h_this, or_null, n, THREAD);

 }

 klassOop typeArrayKlass::array_klass_impl(typeArrayKlassHandle h_this, bool or_null, int n, TRAPS) {

   int dimension = h_this->dimension();

   assert(dimension <= n, "check order of chain");

     if (dimension == n)

       return h_this();

   objArrayKlassHandle  h_ak(THREAD, h_this->higher_dimension());

   if (h_ak.is_null()) {

     if (or_null)  return NULL;

     ResourceMark rm;

     JavaThread *jt = (JavaThread *)THREAD;

     {

       MutexLocker mc(Compile_lock, THREAD);   // for vtables

       // Atomic create higher dimension and link into list

       MutexLocker mu(MultiArray_lock, THREAD);

       h_ak = objArrayKlassHandle(THREAD, h_this->higher_dimension());

       if (h_ak.is_null()) {

         klassOop oak = objArrayKlassKlass::cast(

           Universe::objArrayKlassKlassObj())->allocate_objArray_klass(

           dimension + 1, h_this, CHECK_NULL);

         h_ak = objArrayKlassHandle(THREAD, oak);

         h_ak->set_lower_dimension(h_this());

         OrderAccess::storestore();

         h_this->set_higher_dimension(h_ak());

         assert(h_ak->oop_is_objArray(), "incorrect initialization of objArrayKlass");

       }

     }

   } else {

     CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());

   }

   if (or_null) {

     return h_ak->array_klass_or_null(n);

   }

   return h_ak->array_klass(n, CHECK_NULL);

 }

 klassOop typeArrayKlass::array_klass_impl(bool or_null, TRAPS) {

   return array_klass_impl(or_null, dimension() +  1, THREAD);

 }

 int typeArrayKlass::oop_size(oop obj) const {

   assert(obj->is_typeArray(),"must be a type array");

   typeArrayOop t = typeArrayOop(obj);

   return t->object_size();

 }

 void typeArrayKlass::oop_follow_contents(oop obj) {

   assert(obj->is_typeArray(),"must be a type array");

   // Performance tweak: We skip iterating over the klass pointer since we

   // know that Universe::typeArrayKlass never moves.

 }

 #ifndef SERIALGC

 void typeArrayKlass::oop_follow_contents(ParCompactionManager* cm, oop obj) {

   assert(obj->is_typeArray(),"must be a type array");

   // Performance tweak: We skip iterating over the klass pointer since we

   // know that Universe::typeArrayKlass never moves.

 }

 #endif // SERIALGC

 int typeArrayKlass::oop_adjust_pointers(oop obj) {

   assert(obj->is_typeArray(),"must be a type array");

   typeArrayOop t = typeArrayOop(obj);

   // Performance tweak: We skip iterating over the klass pointer since we

   // know that Universe::typeArrayKlass never moves.

   return t->object_size();

 }

 int typeArrayKlass::oop_oop_iterate(oop obj, OopClosure* blk) {

   assert(obj->is_typeArray(),"must be a type array");

   typeArrayOop t = typeArrayOop(obj);

   // Performance tweak: We skip iterating over the klass pointer since we

   // know that Universe::typeArrayKlass never moves.

   return t->object_size();

 }

 int typeArrayKlass::oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr) {

   assert(obj->is_typeArray(),"must be a type array");

   typeArrayOop t = typeArrayOop(obj);

   // Performance tweak: We skip iterating over the klass pointer since we

   // know that Universe::typeArrayKlass never moves.

   return t->object_size();

 }

 #ifndef SERIALGC

 void typeArrayKlass::oop_push_contents(PSPromotionManager* pm, oop obj) {

   assert(obj->is_typeArray(),"must be a type array");

 }

 int

 typeArrayKlass::oop_update_pointers(ParCompactionManager* cm, oop obj) {

   assert(obj->is_typeArray(),"must be a type array");

   return typeArrayOop(obj)->object_size();

 }

 int

 typeArrayKlass::oop_update_pointers(ParCompactionManager* cm, oop obj,

                                     HeapWord* beg_addr, HeapWord* end_addr) {

   assert(obj->is_typeArray(),"must be a type array");

   return typeArrayOop(obj)->object_size();

 }

 #endif // SERIALGC

 void typeArrayKlass::initialize(TRAPS) {

   // Nothing to do. Having this function is handy since objArrayKlasses can be

   // initialized by calling initialize on their bottom_klass, see objArrayKlass::initialize

 }

 const char* typeArrayKlass::external_name(BasicType type) {

   switch (type) {

     case T_BOOLEAN: return "[Z";

     case T_CHAR:    return "[C";

     case T_FLOAT:   return "[F";

     case T_DOUBLE:  return "[D";

     case T_BYTE:    return "[B";

     case T_SHORT:   return "[S";

     case T_INT:     return "[I";

     case T_LONG:    return "[J";

     default: ShouldNotReachHere();

   }

   return NULL;

 }

 #ifndef PRODUCT

 // Printing

 static void print_boolean_array(typeArrayOop ta, int print_len, outputStream* st) {

   for (int index = 0; index < print_len; index++) {

     st->print_cr(" - %3d: %s", index, (ta->bool_at(index) == 0) ? "false" : "true");

   }

 }

 static void print_char_array(typeArrayOop ta, int print_len, outputStream* st) {

   for (int index = 0; index < print_len; index++) {

     jchar c = ta->char_at(index);

     st->print_cr(" - %3d: %x %c", index, c, isprint(c) ? c : ' ');

   }

 }

 static void print_float_array(typeArrayOop ta, int print_len, outputStream* st) {

   for (int index = 0; index < print_len; index++) {

     st->print_cr(" - %3d: %g", index, ta->float_at(index));

   }

 }

 static void print_double_array(typeArrayOop ta, int print_len, outputStream* st) {

   for (int index = 0; index < print_len; index++) {

     st->print_cr(" - %3d: %g", index, ta->double_at(index));

   }

 }

 static void print_byte_array(typeArrayOop ta, int print_len, outputStream* st) {

   for (int index = 0; index < print_len; index++) {

     jbyte c = ta->byte_at(index);

     st->print_cr(" - %3d: %x %c", index, c, isprint(c) ? c : ' ');

   }

 }

 static void print_short_array(typeArrayOop ta, int print_len, outputStream* st) {

   for (int index = 0; index < print_len; index++) {

     int v = ta->ushort_at(index);

     st->print_cr(" - %3d: 0x%x\t %d", index, v, v);

   }

 }

 static void print_int_array(typeArrayOop ta, int print_len, outputStream* st) {

   for (int index = 0; index < print_len; index++) {

     jint v = ta->int_at(index);

     st->print_cr(" - %3d: 0x%x %d", index, v, v);

   }

 }

 static void print_long_array(typeArrayOop ta, int print_len, outputStream* st) {

   for (int index = 0; index < print_len; index++) {

     jlong v = ta->long_at(index);

     st->print_cr(" - %3d: 0x%x 0x%x", index, high(v), low(v));

   }

 }

 void typeArrayKlass::oop_print_on(oop obj, outputStream* st) {

   arrayKlass::oop_print_on(obj, st);

   typeArrayOop ta = typeArrayOop(obj);

   int print_len = MIN2((intx) ta->length(), MaxElementPrintSize);

   switch (element_type()) {

     case T_BOOLEAN: print_boolean_array(ta, print_len, st); break;

     case T_CHAR:    print_char_array(ta, print_len, st);    break;

     case T_FLOAT:   print_float_array(ta, print_len, st);   break;

     case T_DOUBLE:  print_double_array(ta, print_len, st);  break;

     case T_BYTE:    print_byte_array(ta, print_len, st);    break;

     case T_SHORT:   print_short_array(ta, print_len, st);   break;

     case T_INT:     print_int_array(ta, print_len, st);     break;

     case T_LONG:    print_long_array(ta, print_len, st);    break;

     default: ShouldNotReachHere();

   }

   int remaining = ta->length() - print_len;

   if (remaining > 0) {

     tty->print_cr(" - <%d more elements, increase MaxElementPrintSize to print>", remaining);

   }

 }

 #endif // PRODUCT

 const char* typeArrayKlass::internal_name() const {

   return Klass::external_name();

 }