/*

 * Copyright (c) 1997, 2014, 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 "ci/ciMethod.hpp"

#include "interpreter/interpreter.hpp"

#include "runtime/frame.inline.hpp"

#ifndef CC_INTERP

// asm based interpreter deoptimization helpers

int AbstractInterpreter::size_activation(int max_stack,

                                         int temps,

                                         int extra_args,

                                         int monitors,

                                         int callee_params,

                                         int callee_locals,

                                         bool is_top_frame) {

  // Note: This calculation must exactly parallel the frame setup

  // in AbstractInterpreterGenerator::generate_method_entry.

  // fixed size of an interpreter frame:

  int overhead = frame::sender_sp_offset -

                 frame::interpreter_frame_initial_sp_offset;

  // Our locals were accounted for by the caller (or last_frame_adjust

  // on the transistion) Since the callee parameters already account

  // for the callee's params we only need to account for the extra

  // locals.

  int size = overhead +

         (callee_locals - callee_params)*Interpreter::stackElementWords +

         monitors * frame::interpreter_frame_monitor_size() +

         temps* Interpreter::stackElementWords + extra_args;

  return size;

}

void AbstractInterpreter::layout_activation(Method* method,

                                            int tempcount,

                                            int popframe_extra_args,

                                            int moncount,

                                            int caller_actual_parameters,

                                            int callee_param_count,

                                            int callee_locals,

                                            frame* caller,

                                            frame* interpreter_frame,

                                            bool is_top_frame,

                                            bool is_bottom_frame) {

  // The frame interpreter_frame is guaranteed to be the right size,

  // as determined by a previous call to the size_activation() method.

  // It is also guaranteed to be walkable even though it is in a

  // skeletal state

  int max_locals = method->max_locals() * Interpreter::stackElementWords;

  int extra_locals = (method->max_locals() - method->size_of_parameters()) *

    Interpreter::stackElementWords;

#ifdef ASSERT

  if (!EnableInvokeDynamic) {

    // @@@ FIXME: Should we correct interpreter_frame_sender_sp in the calling sequences?

    // Probably, since deoptimization doesn't work yet.

    assert(caller->unextended_sp() == interpreter_frame->interpreter_frame_sender_sp(), "Frame not properly walkable");

  }

  assert(caller->sp() == interpreter_frame->sender_sp(), "Frame not properly walkable(2)");

#endif

  interpreter_frame->interpreter_frame_set_method(method);

  // NOTE the difference in using sender_sp and

  // interpreter_frame_sender_sp interpreter_frame_sender_sp is

  // the original sp of the caller (the unextended_sp) and

  // sender_sp is fp+8/16 (32bit/64bit) XXX

  intptr_t* locals = interpreter_frame->sender_sp() + max_locals - 1;

#ifdef ASSERT

  if (caller->is_interpreted_frame()) {

    assert(locals < caller->fp() + frame::interpreter_frame_initial_sp_offset, "bad placement");

  }

#endif

  interpreter_frame->interpreter_frame_set_locals(locals);

  BasicObjectLock* montop = interpreter_frame->interpreter_frame_monitor_begin();

  BasicObjectLock* monbot = montop - moncount;

  interpreter_frame->interpreter_frame_set_monitor_end(monbot);

  // Set last_sp

  intptr_t*  esp = (intptr_t*) monbot -

    tempcount*Interpreter::stackElementWords -

    popframe_extra_args;

  interpreter_frame->interpreter_frame_set_last_sp(esp);

  // All frames but the initial (oldest) interpreter frame we fill in have

  // a value for sender_sp that allows walking the stack but isn't

  // truly correct. Correct the value here.

  if (extra_locals != 0 &&

      interpreter_frame->sender_sp() ==

      interpreter_frame->interpreter_frame_sender_sp()) {

    interpreter_frame->set_interpreter_frame_sender_sp(caller->sp() +

                                                       extra_locals);

  }

  *interpreter_frame->interpreter_frame_cache_addr() =

    method->constants()->cache();

}

#endif // CC_INTERP