/*

 * 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 "interp_masm_x86.hpp"

#include "interpreter/interpreter.hpp"

#include "oops/methodData.hpp"

#ifndef CC_INTERP

void InterpreterMacroAssembler::profile_obj_type(Register obj, const Address& mdo_addr) {

  Label update, next, none;

  verify_oop(obj);

  testptr(obj, obj);

  jccb(Assembler::notZero, update);

  orptr(mdo_addr, TypeEntries::null_seen);

  jmpb(next);

  bind(update);

  load_klass(obj, obj);

  xorptr(obj, mdo_addr);

  testptr(obj, TypeEntries::type_klass_mask);

  jccb(Assembler::zero, next); // klass seen before, nothing to

                               // do. The unknown bit may have been

                               // set already but no need to check.

  testptr(obj, TypeEntries::type_unknown);

  jccb(Assembler::notZero, next); // already unknown. Nothing to do anymore.

  cmpptr(mdo_addr, 0);

  jccb(Assembler::equal, none);

  cmpptr(mdo_addr, TypeEntries::null_seen);

  jccb(Assembler::equal, none);

  // There is a chance that the checks above (re-reading profiling

  // data from memory) fail if another thread has just set the

  // profiling to this obj's klass

  xorptr(obj, mdo_addr);

  testptr(obj, TypeEntries::type_klass_mask);

  jccb(Assembler::zero, next);

  // different than before. Cannot keep accurate profile.

  orptr(mdo_addr, TypeEntries::type_unknown);

  jmpb(next);

  bind(none);

  // first time here. Set profile type.

  movptr(mdo_addr, obj);

  bind(next);

}

void InterpreterMacroAssembler::profile_arguments_type(Register mdp, Register callee, Register tmp, bool is_virtual) {

  if (!ProfileInterpreter) {

    return;

  }

  if (MethodData::profile_arguments() || MethodData::profile_return()) {

    Label profile_continue;

    test_method_data_pointer(mdp, profile_continue);

    int off_to_start = is_virtual ? in_bytes(VirtualCallData::virtual_call_data_size()) : in_bytes(CounterData::counter_data_size());

    cmpb(Address(mdp, in_bytes(DataLayout::tag_offset()) - off_to_start), is_virtual ? DataLayout::virtual_call_type_data_tag : DataLayout::call_type_data_tag);

    jcc(Assembler::notEqual, profile_continue);

    if (MethodData::profile_arguments()) {

      Label done;

      int off_to_args = in_bytes(TypeEntriesAtCall::args_data_offset());

      addptr(mdp, off_to_args);

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

        if (i > 0 || MethodData::profile_return()) {

          // If return value type is profiled we may have no argument to profile

          movptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::cell_count_offset())-off_to_args));

          subl(tmp, i*TypeStackSlotEntries::per_arg_count());

          cmpl(tmp, TypeStackSlotEntries::per_arg_count());

          jcc(Assembler::less, done);

        }

        movptr(tmp, Address(callee, Method::const_offset()));

        load_unsigned_short(tmp, Address(tmp, ConstMethod::size_of_parameters_offset()));

        // stack offset o (zero based) from the start of the argument

        // list, for n arguments translates into offset n - o - 1 from

        // the end of the argument list

        subptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::stack_slot_offset(i))-off_to_args));

        subl(tmp, 1);

        Address arg_addr = argument_address(tmp);

        movptr(tmp, arg_addr);

        Address mdo_arg_addr(mdp, in_bytes(TypeEntriesAtCall::argument_type_offset(i))-off_to_args);

        profile_obj_type(tmp, mdo_arg_addr);

        int to_add = in_bytes(TypeStackSlotEntries::per_arg_size());

        addptr(mdp, to_add);

        off_to_args += to_add;

      }

      if (MethodData::profile_return()) {

        movptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::cell_count_offset())-off_to_args));

        subl(tmp, TypeProfileArgsLimit*TypeStackSlotEntries::per_arg_count());

      }

      bind(done);

      if (MethodData::profile_return()) {

        // We're right after the type profile for the last

        // argument. tmp is the number of cells left in the

        // CallTypeData/VirtualCallTypeData to reach its end. Non null

        // if there's a return to profile.

        assert(ReturnTypeEntry::static_cell_count() < TypeStackSlotEntries::per_arg_count(), "can't move past ret type");

        shll(tmp, exact_log2(DataLayout::cell_size));

        addptr(mdp, tmp);

      }

      movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp);

    } else {

      assert(MethodData::profile_return(), "either profile call args or call ret");

      update_mdp_by_constant(mdp, in_bytes(TypeEntriesAtCall::return_only_size()));

    }

    // mdp points right after the end of the

    // CallTypeData/VirtualCallTypeData, right after the cells for the

    // return value type if there's one

    bind(profile_continue);

  }

}

void InterpreterMacroAssembler::profile_return_type(Register mdp, Register ret, Register tmp) {

  assert_different_registers(mdp, ret, tmp, _bcp_register);

  if (ProfileInterpreter && MethodData::profile_return()) {

    Label profile_continue, done;

    test_method_data_pointer(mdp, profile_continue);

    if (MethodData::profile_return_jsr292_only()) {

      // If we don't profile all invoke bytecodes we must make sure

      // it's a bytecode we indeed profile. We can't go back to the

      // begining of the ProfileData we intend to update to check its

      // type because we're right after it and we don't known its

      // length

      Label do_profile;

      cmpb(Address(_bcp_register, 0), Bytecodes::_invokedynamic);

      jcc(Assembler::equal, do_profile);

      cmpb(Address(_bcp_register, 0), Bytecodes::_invokehandle);

      jcc(Assembler::equal, do_profile);

      get_method(tmp);

      cmpb(Address(tmp, Method::intrinsic_id_offset_in_bytes()), vmIntrinsics::_compiledLambdaForm);

      jcc(Assembler::notEqual, profile_continue);

      bind(do_profile);

    }

    Address mdo_ret_addr(mdp, -in_bytes(ReturnTypeEntry::size()));

    mov(tmp, ret);

    profile_obj_type(tmp, mdo_ret_addr);

    bind(profile_continue);

  }

}

void InterpreterMacroAssembler::profile_parameters_type(Register mdp, Register tmp1, Register tmp2) {

  if (ProfileInterpreter && MethodData::profile_parameters()) {

    Label profile_continue, done;

    test_method_data_pointer(mdp, profile_continue);

    // Load the offset of the area within the MDO used for

    // parameters. If it's negative we're not profiling any parameters

    movl(tmp1, Address(mdp, in_bytes(MethodData::parameters_type_data_di_offset()) - in_bytes(MethodData::data_offset())));

    testl(tmp1, tmp1);

    jcc(Assembler::negative, profile_continue);

    // Compute a pointer to the area for parameters from the offset

    // and move the pointer to the slot for the last

    // parameters. Collect profiling from last parameter down.

    // mdo start + parameters offset + array length - 1

    addptr(mdp, tmp1);

    movptr(tmp1, Address(mdp, ArrayData::array_len_offset()));

    decrement(tmp1, TypeStackSlotEntries::per_arg_count());

    Label loop;

    bind(loop);

    int off_base = in_bytes(ParametersTypeData::stack_slot_offset(0));

    int type_base = in_bytes(ParametersTypeData::type_offset(0));

    Address::ScaleFactor per_arg_scale = Address::times(DataLayout::cell_size);

    Address arg_off(mdp, tmp1, per_arg_scale, off_base);

    Address arg_type(mdp, tmp1, per_arg_scale, type_base);

    // load offset on the stack from the slot for this parameter

    movptr(tmp2, arg_off);

    negptr(tmp2);

    // read the parameter from the local area

    movptr(tmp2, Address(_locals_register, tmp2, Interpreter::stackElementScale()));

    // profile the parameter

    profile_obj_type(tmp2, arg_type);

    // go to next parameter

    decrement(tmp1, TypeStackSlotEntries::per_arg_count());

    jcc(Assembler::positive, loop);

    bind(profile_continue);

  }

}

#endif