/*

 * Copyright (c) 1997, 2012, 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;

  Symbol* sym = NULL;

  if (name_str != NULL) {

    sym = SymbolTable::new_permanent_symbol(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_common(int length, bool do_zero, 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 (do_zero) {

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

      } else {

        t = (typeArrayOop)CollectedHeap::array_allocate_nozero(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");

      JvmtiExport::post_array_size_exhausted();

      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();

}

#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();

}