/*

 * Copyright (c) 1997, 2013, 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 "code/codeCache.hpp"

#include "code/compiledIC.hpp"

#include "code/icBuffer.hpp"

#include "code/nmethod.hpp"

#include "code/vtableStubs.hpp"

#include "interpreter/interpreter.hpp"

#include "interpreter/linkResolver.hpp"

#include "memory/metadataFactory.hpp"

#include "memory/oopFactory.hpp"

#include "oops/method.hpp"

#include "oops/oop.inline.hpp"

#include "oops/symbol.hpp"

#include "runtime/icache.hpp"

#include "runtime/sharedRuntime.hpp"

#include "runtime/stubRoutines.hpp"

#include "utilities/events.hpp"

// Release the CompiledICHolder* associated with this call site is there is one.

void CompiledIC::cleanup_call_site(virtual_call_Relocation* call_site) {

  // This call site might have become stale so inspect it carefully.

  NativeCall* call = nativeCall_at(call_site->addr());

  if (is_icholder_entry(call->destination())) {

    NativeMovConstReg* value = nativeMovConstReg_at(call_site->cached_value());

    InlineCacheBuffer::queue_for_release((CompiledICHolder*)value->data());

  }

}

bool CompiledIC::is_icholder_call_site(virtual_call_Relocation* call_site) {

  // This call site might have become stale so inspect it carefully.

  NativeCall* call = nativeCall_at(call_site->addr());

  return is_icholder_entry(call->destination());

}

//-----------------------------------------------------------------------------

// High-level access to an inline cache. Guaranteed to be MT-safe.

CompiledIC::CompiledIC(nmethod* nm, NativeCall* call)

  : _ic_call(call)

{

  address ic_call = call->instruction_address();

  assert(ic_call != NULL, "ic_call address must be set");

  assert(nm != NULL, "must pass nmethod");

  assert(nm->contains(ic_call), "must be in nmethod");

  // Search for the ic_call at the given address.

  RelocIterator iter(nm, ic_call, ic_call+1);

  bool ret = iter.next();

  assert(ret == true, "relocInfo must exist at this address");

  assert(iter.addr() == ic_call, "must find ic_call");

  if (iter.type() == relocInfo::virtual_call_type) {

    virtual_call_Relocation* r = iter.virtual_call_reloc();

    _is_optimized = false;

    _value = nativeMovConstReg_at(r->cached_value());

  } else {

    assert(iter.type() == relocInfo::opt_virtual_call_type, "must be a virtual call");

    _is_optimized = true;

    _value = NULL;

  }

}

// ----------------------------------------------------------------------------

void CompiledStaticCall::emit_to_interp_stub(CodeBuffer &cbuf) {

  ShouldNotReachHere(); // Only needed for COMPILER2.

}

int CompiledStaticCall::to_interp_stub_size() {

  ShouldNotReachHere(); // Only needed for COMPILER2.

  return 0;

}

// Relocation entries for call stub, compiled java to interpreter.

int CompiledStaticCall::reloc_to_interp_stub() {

  ShouldNotReachHere(); // Only needed for COMPILER2.

  return 0;

}

void CompiledStaticCall::set_to_interpreted(methodHandle callee, address entry) {

  ShouldNotReachHere(); // Only needed for COMPILER2.

}

void CompiledStaticCall::set_stub_to_clean(static_stub_Relocation* static_stub) {

  ShouldNotReachHere(); // Only needed for COMPILER2.

}

//-----------------------------------------------------------------------------

// Non-product mode code.

#ifndef PRODUCT

void CompiledStaticCall::verify() {

  ShouldNotReachHere(); // Only needed for COMPILER2.

}

#endif // !PRODUCT