hotspot/src/cpu/x86/vm/interp_masm_x86.cpp - edge/openjdk - Git at Google

 /*
  * Copyright (c) 1997, 2016, 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"


 // 8u does not have InterpreterMacroAssembler::load_earlyret_value here

 void InterpreterMacroAssembler::narrow(Register result) {

   // Get method->_constMethod->_result_type
   movptr(rcx, Address(rbp, frame::interpreter_frame_method_offset * wordSize));
   movptr(rcx, Address(rcx, Method::const_offset()));
   load_unsigned_byte(rcx, Address(rcx, ConstMethod::result_type_offset()));

   Label done, notBool, notByte, notChar;

   // common case first
   cmpl(rcx, T_INT);
   jcc(Assembler::equal, done);

   // mask integer result to narrower return type.
   cmpl(rcx, T_BOOLEAN);
   jcc(Assembler::notEqual, notBool);
   andl(result, 0x1);
   jmp(done);

   bind(notBool);
   cmpl(rcx, T_BYTE);
   jcc(Assembler::notEqual, notByte);
   LP64_ONLY(movsbl(result, result);)
   NOT_LP64(shll(result, 24);)      // truncate upper 24 bits
   NOT_LP64(sarl(result, 24);)      // and sign-extend byte
   jmp(done);

   bind(notByte);
   cmpl(rcx, T_CHAR);
   jcc(Assembler::notEqual, notChar);
   LP64_ONLY(movzwl(result, result);)
   NOT_LP64(andl(result, 0xFFFF);)  // truncate upper 16 bits
   jmp(done);

   bind(notChar);
   // cmpl(rcx, T_SHORT);  // all that's left
   // jcc(Assembler::notEqual, done);
   LP64_ONLY(movswl(result, result);)
   NOT_LP64(shll(result, 16);)      // truncate upper 16 bits
   NOT_LP64(sarl(result, 16);)      // and sign-extend short

   // Nothing to do for T_INT
   bind(done);
 }

 #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_mdx_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
	/*
	* Copyright (c) 1997, 2016, 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"


	// 8u does not have InterpreterMacroAssembler::load_earlyret_value here

	void InterpreterMacroAssembler::narrow(Register result) {

	// Get method->_constMethod->_result_type
	movptr(rcx, Address(rbp, frame::interpreter_frame_method_offset * wordSize));
	movptr(rcx, Address(rcx, Method::const_offset()));
	load_unsigned_byte(rcx, Address(rcx, ConstMethod::result_type_offset()));

	Label done, notBool, notByte, notChar;

	// common case first
	cmpl(rcx, T_INT);
	jcc(Assembler::equal, done);

	// mask integer result to narrower return type.
	cmpl(rcx, T_BOOLEAN);
	jcc(Assembler::notEqual, notBool);
	andl(result, 0x1);
	jmp(done);

	bind(notBool);
	cmpl(rcx, T_BYTE);
	jcc(Assembler::notEqual, notByte);
	LP64_ONLY(movsbl(result, result);)
	NOT_LP64(shll(result, 24);) // truncate upper 24 bits
	NOT_LP64(sarl(result, 24);) // and sign-extend byte
	jmp(done);

	bind(notByte);
	cmpl(rcx, T_CHAR);
	jcc(Assembler::notEqual, notChar);
	LP64_ONLY(movzwl(result, result);)
	NOT_LP64(andl(result, 0xFFFF);) // truncate upper 16 bits
	jmp(done);

	bind(notChar);
	// cmpl(rcx, T_SHORT); // all that's left
	// jcc(Assembler::notEqual, done);
	LP64_ONLY(movswl(result, result);)
	NOT_LP64(shll(result, 16);) // truncate upper 16 bits
	NOT_LP64(sarl(result, 16);) // and sign-extend short

	// Nothing to do for T_INT
	bind(done);
	}

	#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_mdx_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