/*

 * Copyright (c) 1999, 2012, Oracle and/or its affiliates. All rights reserved.

 * Copyright 2008, 2009, 2010 Red Hat, Inc.

 * 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 "runtime/biasedLocking.hpp"

#include "runtime/deoptimization.hpp"

#include "runtime/thread.hpp"

#include "shark/llvmHeaders.hpp"

#include "shark/sharkRuntime.hpp"

#ifdef TARGET_ARCH_zero

# include "stack_zero.inline.hpp"

#endif

using namespace llvm;

JRT_ENTRY(int, SharkRuntime::find_exception_handler(JavaThread* thread,

                                                    int*        indexes,

                                                    int         num_indexes))

  constantPoolHandle pool(thread, method(thread)->constants());

  KlassHandle exc_klass(thread, ((oop) tos_at(thread, 0))->klass());

  for (int i = 0; i < num_indexes; i++) {

    Klass* tmp = pool->klass_at(indexes[i], CHECK_0);

    KlassHandle chk_klass(thread, tmp);

    if (exc_klass() == chk_klass())

      return i;

    if (exc_klass()->is_subtype_of(chk_klass()))

      return i;

  }

  return -1;

JRT_END

JRT_ENTRY(void, SharkRuntime::monitorenter(JavaThread*      thread,

                                           BasicObjectLock* lock))

  if (PrintBiasedLockingStatistics)

    Atomic::inc(BiasedLocking::slow_path_entry_count_addr());

  Handle object(thread, lock->obj());

  assert(Universe::heap()->is_in_reserved_or_null(object()), "should be");

  if (UseBiasedLocking) {

    // Retry fast entry if bias is revoked to avoid unnecessary inflation

    ObjectSynchronizer::fast_enter(object, lock->lock(), true, CHECK);

  } else {

    ObjectSynchronizer::slow_enter(object, lock->lock(), CHECK);

  }

  assert(Universe::heap()->is_in_reserved_or_null(lock->obj()), "should be");

JRT_END

JRT_ENTRY(void, SharkRuntime::monitorexit(JavaThread*      thread,

                                          BasicObjectLock* lock))

  Handle object(thread, lock->obj());

  assert(Universe::heap()->is_in_reserved_or_null(object()), "should be");

  if (lock == NULL || object()->is_unlocked()) {

    THROW(vmSymbols::java_lang_IllegalMonitorStateException());

  }

  ObjectSynchronizer::slow_exit(object(), lock->lock(), thread);

JRT_END

JRT_ENTRY(void, SharkRuntime::new_instance(JavaThread* thread, int index))

  Klass* k_oop = method(thread)->constants()->klass_at(index, CHECK);

  instanceKlassHandle klass(THREAD, k_oop);

  // Make sure we are not instantiating an abstract klass

  klass->check_valid_for_instantiation(true, CHECK);

  // Make sure klass is initialized

  klass->initialize(CHECK);

  // At this point the class may not be fully initialized

  // because of recursive initialization. If it is fully

  // initialized & has_finalized is not set, we rewrite

  // it into its fast version (Note: no locking is needed

  // here since this is an atomic byte write and can be

  // done more than once).

  //

  // Note: In case of classes with has_finalized we don't

  //       rewrite since that saves us an extra check in

  //       the fast version which then would call the

  //       slow version anyway (and do a call back into

  //       Java).

  //       If we have a breakpoint, then we don't rewrite

  //       because the _breakpoint bytecode would be lost.

  oop obj = klass->allocate_instance(CHECK);

  thread->set_vm_result(obj);

JRT_END

JRT_ENTRY(void, SharkRuntime::newarray(JavaThread* thread,

                                       BasicType   type,

                                       int         size))

  oop obj = oopFactory::new_typeArray(type, size, CHECK);

  thread->set_vm_result(obj);

JRT_END

JRT_ENTRY(void, SharkRuntime::anewarray(JavaThread* thread,

                                        int         index,

                                        int         size))

  Klass* klass = method(thread)->constants()->klass_at(index, CHECK);

  objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK);

  thread->set_vm_result(obj);

JRT_END

JRT_ENTRY(void, SharkRuntime::multianewarray(JavaThread* thread,

                                             int         index,

                                             int         ndims,

                                             int*        dims))

  Klass* klass = method(thread)->constants()->klass_at(index, CHECK);

  oop obj = ArrayKlass::cast(klass)->multi_allocate(ndims, dims, CHECK);

  thread->set_vm_result(obj);

JRT_END

JRT_ENTRY(void, SharkRuntime::register_finalizer(JavaThread* thread,

                                                 oop         object))

  assert(object->is_oop(), "should be");

  assert(object->klass()->has_finalizer(), "should have");

  InstanceKlass::register_finalizer(instanceOop(object), CHECK);

JRT_END

JRT_ENTRY(void, SharkRuntime::throw_ArithmeticException(JavaThread* thread,

                                                        const char* file,

                                                        int         line))

  Exceptions::_throw_msg(

    thread, file, line,

    vmSymbols::java_lang_ArithmeticException(),

    "");

JRT_END

JRT_ENTRY(void, SharkRuntime::throw_ArrayIndexOutOfBoundsException(

                                                     JavaThread* thread,

                                                     const char* file,

                                                     int         line,

                                                     int         index))

  char msg[jintAsStringSize];

  snprintf(msg, sizeof(msg), "%d", index);

  Exceptions::_throw_msg(

    thread, file, line,

    vmSymbols::java_lang_ArrayIndexOutOfBoundsException(),

    msg);

JRT_END

JRT_ENTRY(void, SharkRuntime::throw_ClassCastException(JavaThread* thread,

                                                       const char* file,

                                                       int         line))

  Exceptions::_throw_msg(

    thread, file, line,

    vmSymbols::java_lang_ClassCastException(),

    "");

JRT_END

JRT_ENTRY(void, SharkRuntime::throw_NullPointerException(JavaThread* thread,

                                                         const char* file,

                                                         int         line))

  Exceptions::_throw_msg(

    thread, file, line,

    vmSymbols::java_lang_NullPointerException(),

    "");

JRT_END

// Non-VM calls

// Nothing in these must ever GC!

void SharkRuntime::dump(const char *name, intptr_t value) {

  oop valueOop = (oop) value;

  tty->print("%s = ", name);

  if (valueOop->is_oop(true))

    valueOop->print_on(tty);

  else if (value >= ' ' && value <= '~')

    tty->print("'%c' (%d)", value, value);

  else

    tty->print("%p", value);

  tty->print_cr("");

}

bool SharkRuntime::is_subtype_of(Klass* check_klass, Klass* object_klass) {

  return object_klass->is_subtype_of(check_klass);

}

int SharkRuntime::uncommon_trap(JavaThread* thread, int trap_request) {

  Thread *THREAD = thread;

  // In C2, uncommon_trap_blob creates a frame, so all the various

  // deoptimization functions expect to find the frame of the method

  // being deopted one frame down on the stack.  We create a dummy

  // frame to mirror this.

  FakeStubFrame *stubframe = FakeStubFrame::build(CHECK_0);

  thread->push_zero_frame(stubframe);

  // Initiate the trap

  thread->set_last_Java_frame();

  Deoptimization::UnrollBlock *urb =

    Deoptimization::uncommon_trap(thread, trap_request);

  thread->reset_last_Java_frame();

  // Pop our dummy frame and the frame being deoptimized

  thread->pop_zero_frame();

  thread->pop_zero_frame();

  // Push skeleton frames

  int number_of_frames = urb->number_of_frames();

  for (int i = 0; i < number_of_frames; i++) {

    intptr_t size = urb->frame_sizes()[i];

    InterpreterFrame *frame = InterpreterFrame::build(size, CHECK_0);

    thread->push_zero_frame(frame);

  }

  // Push another dummy frame

  stubframe = FakeStubFrame::build(CHECK_0);

  thread->push_zero_frame(stubframe);

  // Fill in the skeleton frames

  thread->set_last_Java_frame();

  Deoptimization::unpack_frames(thread, Deoptimization::Unpack_uncommon_trap);

  thread->reset_last_Java_frame();

  // Pop our dummy frame

  thread->pop_zero_frame();

  // Fall back into the interpreter

  return number_of_frames;

}

FakeStubFrame* FakeStubFrame::build(TRAPS) {

  ZeroStack *stack = ((JavaThread *) THREAD)->zero_stack();

  stack->overflow_check(header_words, CHECK_NULL);

  stack->push(0); // next_frame, filled in later

  intptr_t *fp = stack->sp();

  assert(fp - stack->sp() == next_frame_off, "should be");

  stack->push(FAKE_STUB_FRAME);

  assert(fp - stack->sp() == frame_type_off, "should be");

  return (FakeStubFrame *) fp;

}