hotspot/src/cpu/x86/vm/c1_CodeStubs_x86.cpp
author johnc
Mon, 18 Apr 2011 16:27:16 -0700
changeset 9186 7e9f22667cfc
parent 9182 ab3e9e0925ad
child 10972 ef164805934c
permissions -rw-r--r--
7036706: G1: Use LIR_OprDesc::as_pointer_register in code changes for 7035117 Summary: Use LIR_OprDesc::as_pointer_register() instead as_register/as_register_lo combination in the code changes for 7035117. Reviewed-by: iveresov
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/*
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 * Copyright (c) 1999, 2011, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 *
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 */
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#include "precompiled.hpp"
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#include "c1/c1_CodeStubs.hpp"
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#include "c1/c1_FrameMap.hpp"
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#include "c1/c1_LIRAssembler.hpp"
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#include "c1/c1_MacroAssembler.hpp"
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#include "c1/c1_Runtime1.hpp"
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#include "nativeInst_x86.hpp"
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#include "runtime/sharedRuntime.hpp"
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#include "vmreg_x86.inline.hpp"
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#ifndef SERIALGC
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#include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp"
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#endif
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#define __ ce->masm()->
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float ConversionStub::float_zero = 0.0;
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double ConversionStub::double_zero = 0.0;
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void ConversionStub::emit_code(LIR_Assembler* ce) {
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  __ bind(_entry);
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  assert(bytecode() == Bytecodes::_f2i || bytecode() == Bytecodes::_d2i, "other conversions do not require stub");
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  if (input()->is_single_xmm()) {
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    __ comiss(input()->as_xmm_float_reg(),
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              ExternalAddress((address)&float_zero));
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  } else if (input()->is_double_xmm()) {
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    __ comisd(input()->as_xmm_double_reg(),
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              ExternalAddress((address)&double_zero));
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  } else {
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    LP64_ONLY(ShouldNotReachHere());
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    __ push(rax);
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    __ ftst();
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    __ fnstsw_ax();
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    __ sahf();
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    __ pop(rax);
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  }
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  Label NaN, do_return;
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  __ jccb(Assembler::parity, NaN);
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  __ jccb(Assembler::below, do_return);
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  // input is > 0 -> return maxInt
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  // result register already contains 0x80000000, so subtracting 1 gives 0x7fffffff
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  __ decrement(result()->as_register());
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  __ jmpb(do_return);
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  // input is NaN -> return 0
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  __ bind(NaN);
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  __ xorptr(result()->as_register(), result()->as_register());
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  __ bind(do_return);
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  __ jmp(_continuation);
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}
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void CounterOverflowStub::emit_code(LIR_Assembler* ce) {
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  __ bind(_entry);
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  ce->store_parameter(_method->as_register(), 1);
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  ce->store_parameter(_bci, 0);
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  __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::counter_overflow_id)));
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  ce->add_call_info_here(_info);
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  ce->verify_oop_map(_info);
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  __ jmp(_continuation);
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}
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RangeCheckStub::RangeCheckStub(CodeEmitInfo* info, LIR_Opr index,
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                               bool throw_index_out_of_bounds_exception)
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  : _throw_index_out_of_bounds_exception(throw_index_out_of_bounds_exception)
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  , _index(index)
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{
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  assert(info != NULL, "must have info");
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  _info = new CodeEmitInfo(info);
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}
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void RangeCheckStub::emit_code(LIR_Assembler* ce) {
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  __ bind(_entry);
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  // pass the array index on stack because all registers must be preserved
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  if (_index->is_cpu_register()) {
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    ce->store_parameter(_index->as_register(), 0);
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  } else {
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    ce->store_parameter(_index->as_jint(), 0);
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  }
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  Runtime1::StubID stub_id;
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  if (_throw_index_out_of_bounds_exception) {
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    stub_id = Runtime1::throw_index_exception_id;
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  } else {
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    stub_id = Runtime1::throw_range_check_failed_id;
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  }
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  __ call(RuntimeAddress(Runtime1::entry_for(stub_id)));
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  ce->add_call_info_here(_info);
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  debug_only(__ should_not_reach_here());
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}
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void DivByZeroStub::emit_code(LIR_Assembler* ce) {
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  if (_offset != -1) {
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    ce->compilation()->implicit_exception_table()->append(_offset, __ offset());
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  }
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  __ bind(_entry);
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  __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::throw_div0_exception_id)));
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  ce->add_call_info_here(_info);
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  debug_only(__ should_not_reach_here());
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}
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// Implementation of NewInstanceStub
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NewInstanceStub::NewInstanceStub(LIR_Opr klass_reg, LIR_Opr result, ciInstanceKlass* klass, CodeEmitInfo* info, Runtime1::StubID stub_id) {
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  _result = result;
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  _klass = klass;
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  _klass_reg = klass_reg;
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  _info = new CodeEmitInfo(info);
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  assert(stub_id == Runtime1::new_instance_id                 ||
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         stub_id == Runtime1::fast_new_instance_id            ||
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         stub_id == Runtime1::fast_new_instance_init_check_id,
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         "need new_instance id");
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  _stub_id   = stub_id;
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}
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void NewInstanceStub::emit_code(LIR_Assembler* ce) {
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  assert(__ rsp_offset() == 0, "frame size should be fixed");
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  __ bind(_entry);
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  __ movptr(rdx, _klass_reg->as_register());
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  __ call(RuntimeAddress(Runtime1::entry_for(_stub_id)));
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  ce->add_call_info_here(_info);
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  ce->verify_oop_map(_info);
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  assert(_result->as_register() == rax, "result must in rax,");
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  __ jmp(_continuation);
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}
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// Implementation of NewTypeArrayStub
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NewTypeArrayStub::NewTypeArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) {
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  _klass_reg = klass_reg;
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  _length = length;
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  _result = result;
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  _info = new CodeEmitInfo(info);
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}
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void NewTypeArrayStub::emit_code(LIR_Assembler* ce) {
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  assert(__ rsp_offset() == 0, "frame size should be fixed");
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  __ bind(_entry);
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  assert(_length->as_register() == rbx, "length must in rbx,");
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  assert(_klass_reg->as_register() == rdx, "klass_reg must in rdx");
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  __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::new_type_array_id)));
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  ce->add_call_info_here(_info);
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  ce->verify_oop_map(_info);
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  assert(_result->as_register() == rax, "result must in rax,");
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  __ jmp(_continuation);
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}
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// Implementation of NewObjectArrayStub
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NewObjectArrayStub::NewObjectArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) {
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  _klass_reg = klass_reg;
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  _result = result;
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  _length = length;
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  _info = new CodeEmitInfo(info);
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}
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void NewObjectArrayStub::emit_code(LIR_Assembler* ce) {
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  assert(__ rsp_offset() == 0, "frame size should be fixed");
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  __ bind(_entry);
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  assert(_length->as_register() == rbx, "length must in rbx,");
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  assert(_klass_reg->as_register() == rdx, "klass_reg must in rdx");
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  __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::new_object_array_id)));
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  ce->add_call_info_here(_info);
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  ce->verify_oop_map(_info);
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  assert(_result->as_register() == rax, "result must in rax,");
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  __ jmp(_continuation);
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}
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// Implementation of MonitorAccessStubs
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MonitorEnterStub::MonitorEnterStub(LIR_Opr obj_reg, LIR_Opr lock_reg, CodeEmitInfo* info)
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: MonitorAccessStub(obj_reg, lock_reg)
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{
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  _info = new CodeEmitInfo(info);
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}
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void MonitorEnterStub::emit_code(LIR_Assembler* ce) {
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  assert(__ rsp_offset() == 0, "frame size should be fixed");
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  __ bind(_entry);
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  ce->store_parameter(_obj_reg->as_register(),  1);
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  ce->store_parameter(_lock_reg->as_register(), 0);
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  Runtime1::StubID enter_id;
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  if (ce->compilation()->has_fpu_code()) {
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    enter_id = Runtime1::monitorenter_id;
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  } else {
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    enter_id = Runtime1::monitorenter_nofpu_id;
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  }
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  __ call(RuntimeAddress(Runtime1::entry_for(enter_id)));
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  ce->add_call_info_here(_info);
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  ce->verify_oop_map(_info);
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  __ jmp(_continuation);
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}
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void MonitorExitStub::emit_code(LIR_Assembler* ce) {
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  __ bind(_entry);
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  if (_compute_lock) {
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    // lock_reg was destroyed by fast unlocking attempt => recompute it
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    ce->monitor_address(_monitor_ix, _lock_reg);
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  }
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  ce->store_parameter(_lock_reg->as_register(), 0);
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  // note: non-blocking leaf routine => no call info needed
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  Runtime1::StubID exit_id;
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  if (ce->compilation()->has_fpu_code()) {
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    exit_id = Runtime1::monitorexit_id;
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  } else {
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    exit_id = Runtime1::monitorexit_nofpu_id;
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  }
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  __ call(RuntimeAddress(Runtime1::entry_for(exit_id)));
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  __ jmp(_continuation);
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}
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// Implementation of patching:
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// - Copy the code at given offset to an inlined buffer (first the bytes, then the number of bytes)
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// - Replace original code with a call to the stub
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// At Runtime:
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// - call to stub, jump to runtime
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// - in runtime: preserve all registers (rspecially objects, i.e., source and destination object)
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// - in runtime: after initializing class, restore original code, reexecute instruction
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int PatchingStub::_patch_info_offset = -NativeGeneralJump::instruction_size;
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void PatchingStub::align_patch_site(MacroAssembler* masm) {
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  // We're patching a 5-7 byte instruction on intel and we need to
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  // make sure that we don't see a piece of the instruction.  It
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  // appears mostly impossible on Intel to simply invalidate other
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  // processors caches and since they may do aggressive prefetch it's
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  // very hard to make a guess about what code might be in the icache.
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  // Force the instruction to be double word aligned so that it
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  // doesn't span a cache line.
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  masm->align(round_to(NativeGeneralJump::instruction_size, wordSize));
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}
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void PatchingStub::emit_code(LIR_Assembler* ce) {
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  assert(NativeCall::instruction_size <= _bytes_to_copy && _bytes_to_copy <= 0xFF, "not enough room for call");
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  Label call_patch;
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  // static field accesses have special semantics while the class
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  // initializer is being run so we emit a test which can be used to
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  // check that this code is being executed by the initializing
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  // thread.
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  address being_initialized_entry = __ pc();
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  if (CommentedAssembly) {
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    __ block_comment(" patch template");
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  }
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  if (_id == load_klass_id) {
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    // produce a copy of the load klass instruction for use by the being initialized case
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    address start = __ pc();
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    jobject o = NULL;
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    __ movoop(_obj, o);
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#ifdef ASSERT
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    for (int i = 0; i < _bytes_to_copy; i++) {
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      address ptr = (address)(_pc_start + i);
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      int a_byte = (*ptr) & 0xFF;
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      assert(a_byte == *start++, "should be the same code");
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    }
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#endif
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  } else {
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    // make a copy the code which is going to be patched.
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   299
    for ( int i = 0; i < _bytes_to_copy; i++) {
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      address ptr = (address)(_pc_start + i);
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      int a_byte = (*ptr) & 0xFF;
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      __ a_byte (a_byte);
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      *ptr = 0x90; // make the site look like a nop
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    }
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  }
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   306
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  address end_of_patch = __ pc();
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   308
  int bytes_to_skip = 0;
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   309
  if (_id == load_klass_id) {
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    int offset = __ offset();
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   311
    if (CommentedAssembly) {
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      __ block_comment(" being_initialized check");
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   313
    }
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    assert(_obj != noreg, "must be a valid register");
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    Register tmp = rax;
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    Register tmp2 = rbx;
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    __ push(tmp);
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    __ push(tmp2);
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    // Load without verification to keep code size small. We need it because
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    // begin_initialized_entry_offset has to fit in a byte. Also, we know it's not null.
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    __ load_heap_oop_not_null(tmp2, Address(_obj, java_lang_Class::klass_offset_in_bytes()));
1
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    __ get_thread(tmp);
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    __ cmpptr(tmp, Address(tmp2, instanceKlass::init_thread_offset_in_bytes() + sizeof(klassOopDesc)));
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    __ pop(tmp2);
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   325
    __ pop(tmp);
1
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   326
    __ jcc(Assembler::notEqual, call_patch);
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   327
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   328
    // access_field patches may execute the patched code before it's
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   329
    // copied back into place so we need to jump back into the main
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   330
    // code of the nmethod to continue execution.
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   331
    __ jmp(_patch_site_continuation);
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   332
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   333
    // make sure this extra code gets skipped
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   334
    bytes_to_skip += __ offset() - offset;
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   335
  }
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   336
  if (CommentedAssembly) {
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   337
    __ block_comment("patch data encoded as movl");
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   338
  }
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   339
  // Now emit the patch record telling the runtime how to find the
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   340
  // pieces of the patch.  We only need 3 bytes but for readability of
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   341
  // the disassembly we make the data look like a movl reg, imm32,
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   342
  // which requires 5 bytes
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   343
  int sizeof_patch_record = 5;
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   344
  bytes_to_skip += sizeof_patch_record;
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   345
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   346
  // emit the offsets needed to find the code to patch
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   347
  int being_initialized_entry_offset = __ pc() - being_initialized_entry + sizeof_patch_record;
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   348
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   349
  __ a_byte(0xB8);
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  __ a_byte(0);
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   351
  __ a_byte(being_initialized_entry_offset);
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   352
  __ a_byte(bytes_to_skip);
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   353
  __ a_byte(_bytes_to_copy);
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   354
  address patch_info_pc = __ pc();
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   355
  assert(patch_info_pc - end_of_patch == bytes_to_skip, "incorrect patch info");
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   356
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   357
  address entry = __ pc();
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   358
  NativeGeneralJump::insert_unconditional((address)_pc_start, entry);
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   359
  address target = NULL;
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   360
  switch (_id) {
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   361
    case access_field_id:  target = Runtime1::entry_for(Runtime1::access_field_patching_id); break;
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   362
    case load_klass_id:    target = Runtime1::entry_for(Runtime1::load_klass_patching_id); break;
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   363
    default: ShouldNotReachHere();
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   364
  }
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   365
  __ bind(call_patch);
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   366
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   367
  if (CommentedAssembly) {
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   368
    __ block_comment("patch entry point");
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   369
  }
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   370
  __ call(RuntimeAddress(target));
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   371
  assert(_patch_info_offset == (patch_info_pc - __ pc()), "must not change");
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   372
  ce->add_call_info_here(_info);
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   373
  int jmp_off = __ offset();
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   374
  __ jmp(_patch_site_entry);
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   375
  // Add enough nops so deoptimization can overwrite the jmp above with a call
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   376
  // and not destroy the world.
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   377
  for (int j = __ offset() ; j < jmp_off + 5 ; j++ ) {
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   378
    __ nop();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   379
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   380
  if (_id == load_klass_id) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   381
    CodeSection* cs = __ code_section();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   382
    RelocIterator iter(cs, (address)_pc_start, (address)(_pc_start + 1));
489c9b5090e2 Initial load
duke
parents:
diff changeset
   383
    relocInfo::change_reloc_info_for_address(&iter, (address) _pc_start, relocInfo::oop_type, relocInfo::none);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   384
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   385
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   386
489c9b5090e2 Initial load
duke
parents:
diff changeset
   387
5046
27e801a857cb 6919934: JSR 292 needs to support x86 C1
twisti
parents: 1412
diff changeset
   388
void DeoptimizeStub::emit_code(LIR_Assembler* ce) {
27e801a857cb 6919934: JSR 292 needs to support x86 C1
twisti
parents: 1412
diff changeset
   389
  __ bind(_entry);
27e801a857cb 6919934: JSR 292 needs to support x86 C1
twisti
parents: 1412
diff changeset
   390
  __ call(RuntimeAddress(SharedRuntime::deopt_blob()->unpack_with_reexecution()));
27e801a857cb 6919934: JSR 292 needs to support x86 C1
twisti
parents: 1412
diff changeset
   391
  ce->add_call_info_here(_info);
27e801a857cb 6919934: JSR 292 needs to support x86 C1
twisti
parents: 1412
diff changeset
   392
  debug_only(__ should_not_reach_here());
27e801a857cb 6919934: JSR 292 needs to support x86 C1
twisti
parents: 1412
diff changeset
   393
}
27e801a857cb 6919934: JSR 292 needs to support x86 C1
twisti
parents: 1412
diff changeset
   394
27e801a857cb 6919934: JSR 292 needs to support x86 C1
twisti
parents: 1412
diff changeset
   395
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   396
void ImplicitNullCheckStub::emit_code(LIR_Assembler* ce) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   397
  ce->compilation()->implicit_exception_table()->append(_offset, __ offset());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   398
  __ bind(_entry);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   399
  __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::throw_null_pointer_exception_id)));
489c9b5090e2 Initial load
duke
parents:
diff changeset
   400
  ce->add_call_info_here(_info);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   401
  debug_only(__ should_not_reach_here());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   402
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   403
489c9b5090e2 Initial load
duke
parents:
diff changeset
   404
489c9b5090e2 Initial load
duke
parents:
diff changeset
   405
void SimpleExceptionStub::emit_code(LIR_Assembler* ce) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   406
  assert(__ rsp_offset() == 0, "frame size should be fixed");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   407
489c9b5090e2 Initial load
duke
parents:
diff changeset
   408
  __ bind(_entry);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   409
  // pass the object on stack because all registers must be preserved
489c9b5090e2 Initial load
duke
parents:
diff changeset
   410
  if (_obj->is_cpu_register()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   411
    ce->store_parameter(_obj->as_register(), 0);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   412
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   413
  __ call(RuntimeAddress(Runtime1::entry_for(_stub)));
489c9b5090e2 Initial load
duke
parents:
diff changeset
   414
  ce->add_call_info_here(_info);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   415
  debug_only(__ should_not_reach_here());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   416
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   417
489c9b5090e2 Initial load
duke
parents:
diff changeset
   418
489c9b5090e2 Initial load
duke
parents:
diff changeset
   419
void ArrayCopyStub::emit_code(LIR_Assembler* ce) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   420
  //---------------slow case: call to native-----------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
   421
  __ bind(_entry);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   422
  // Figure out where the args should go
489c9b5090e2 Initial load
duke
parents:
diff changeset
   423
  // This should really convert the IntrinsicID to the methodOop and signature
489c9b5090e2 Initial load
duke
parents:
diff changeset
   424
  // but I don't know how to do that.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   425
  //
489c9b5090e2 Initial load
duke
parents:
diff changeset
   426
  VMRegPair args[5];
489c9b5090e2 Initial load
duke
parents:
diff changeset
   427
  BasicType signature[5] = { T_OBJECT, T_INT, T_OBJECT, T_INT, T_INT};
489c9b5090e2 Initial load
duke
parents:
diff changeset
   428
  SharedRuntime::java_calling_convention(signature, args, 5, true);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   429
489c9b5090e2 Initial load
duke
parents:
diff changeset
   430
  // push parameters
489c9b5090e2 Initial load
duke
parents:
diff changeset
   431
  // (src, src_pos, dest, destPos, length)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   432
  Register r[5];
489c9b5090e2 Initial load
duke
parents:
diff changeset
   433
  r[0] = src()->as_register();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   434
  r[1] = src_pos()->as_register();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   435
  r[2] = dst()->as_register();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   436
  r[3] = dst_pos()->as_register();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   437
  r[4] = length()->as_register();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   438
489c9b5090e2 Initial load
duke
parents:
diff changeset
   439
  // next registers will get stored on the stack
489c9b5090e2 Initial load
duke
parents:
diff changeset
   440
  for (int i = 0; i < 5 ; i++ ) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   441
    VMReg r_1 = args[i].first();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   442
    if (r_1->is_stack()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   443
      int st_off = r_1->reg2stack() * wordSize;
1066
717c3345024f 5108146: Merge i486 and amd64 cpu directories
never
parents: 1
diff changeset
   444
      __ movptr (Address(rsp, st_off), r[i]);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   445
    } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   446
      assert(r[i] == args[i].first()->as_Register(), "Wrong register for arg ");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   447
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   448
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   449
489c9b5090e2 Initial load
duke
parents:
diff changeset
   450
  ce->align_call(lir_static_call);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   451
489c9b5090e2 Initial load
duke
parents:
diff changeset
   452
  ce->emit_static_call_stub();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   453
  AddressLiteral resolve(SharedRuntime::get_resolve_static_call_stub(),
489c9b5090e2 Initial load
duke
parents:
diff changeset
   454
                         relocInfo::static_call_type);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   455
  __ call(resolve);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   456
  ce->add_call_info_here(info());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   457
489c9b5090e2 Initial load
duke
parents:
diff changeset
   458
#ifndef PRODUCT
1066
717c3345024f 5108146: Merge i486 and amd64 cpu directories
never
parents: 1
diff changeset
   459
  __ incrementl(ExternalAddress((address)&Runtime1::_arraycopy_slowcase_cnt));
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   460
#endif
489c9b5090e2 Initial load
duke
parents:
diff changeset
   461
489c9b5090e2 Initial load
duke
parents:
diff changeset
   462
  __ jmp(_continuation);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   463
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   464
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 1
diff changeset
   465
/////////////////////////////////////////////////////////////////////////////
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 1
diff changeset
   466
#ifndef SERIALGC
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 1
diff changeset
   467
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 1
diff changeset
   468
void G1PreBarrierStub::emit_code(LIR_Assembler* ce) {
9176
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   469
  // At this point we know that marking is in progress.
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   470
  // If do_load() is true then we have to emit the
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   471
  // load of the previous value; otherwise it has already
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   472
  // been loaded into _pre_val.
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 1
diff changeset
   473
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 1
diff changeset
   474
  __ bind(_entry);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 1
diff changeset
   475
  assert(pre_val()->is_register(), "Precondition.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 1
diff changeset
   476
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 1
diff changeset
   477
  Register pre_val_reg = pre_val()->as_register();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 1
diff changeset
   478
9176
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   479
  if (do_load()) {
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   480
    ce->mem2reg(addr(), pre_val(), T_OBJECT, patch_code(), info(), false /*wide*/, false /*unaligned*/);
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   481
  }
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 1
diff changeset
   482
1394
apetrusenko
parents: 1066 1374
diff changeset
   483
  __ cmpptr(pre_val_reg, (int32_t) NULL_WORD);
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 1
diff changeset
   484
  __ jcc(Assembler::equal, _continuation);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 1
diff changeset
   485
  ce->store_parameter(pre_val()->as_register(), 0);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 1
diff changeset
   486
  __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::g1_pre_barrier_slow_id)));
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 1
diff changeset
   487
  __ jmp(_continuation);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 1
diff changeset
   488
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 1
diff changeset
   489
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 1
diff changeset
   490
9176
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   491
void G1UnsafeGetObjSATBBarrierStub::emit_code(LIR_Assembler* ce) {
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   492
  // At this point we know that offset == referent_offset.
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   493
  //
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   494
  // So we might have to emit:
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   495
  //   if (src == null) goto continuation.
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   496
  //
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   497
  // and we definitely have to emit:
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   498
  //   if (klass(src).reference_type == REF_NONE) goto continuation
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   499
  //   if (!marking_active) goto continuation
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   500
  //   if (pre_val == null) goto continuation
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   501
  //   call pre_barrier(pre_val)
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   502
  //   goto continuation
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   503
  //
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   504
  __ bind(_entry);
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   505
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   506
  assert(src()->is_register(), "sanity");
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   507
  Register src_reg = src()->as_register();
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   508
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   509
  if (gen_src_check()) {
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   510
    // The original src operand was not a constant.
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   511
    // Generate src == null?
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   512
    __ cmpptr(src_reg, (int32_t) NULL_WORD);
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   513
    __ jcc(Assembler::equal, _continuation);
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   514
  }
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   515
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   516
  // Generate src->_klass->_reference_type == REF_NONE)?
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   517
  assert(tmp()->is_register(), "sanity");
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   518
  Register tmp_reg = tmp()->as_register();
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   519
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   520
  __ load_klass(tmp_reg, src_reg);
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   521
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   522
  Address ref_type_adr(tmp_reg, instanceKlass::reference_type_offset_in_bytes() + sizeof(oopDesc));
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   523
  __ cmpl(ref_type_adr, REF_NONE);
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   524
  __ jcc(Assembler::equal, _continuation);
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   525
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   526
  // Is marking active?
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   527
  assert(thread()->is_register(), "precondition");
9186
7e9f22667cfc 7036706: G1: Use LIR_OprDesc::as_pointer_register in code changes for 7035117
johnc
parents: 9182
diff changeset
   528
  Register thread_reg = thread()->as_pointer_register();
9176
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   529
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   530
  Address in_progress(thread_reg, in_bytes(JavaThread::satb_mark_queue_offset() +
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   531
                                       PtrQueue::byte_offset_of_active()));
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   532
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   533
  if (in_bytes(PtrQueue::byte_width_of_active()) == 4) {
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   534
    __ cmpl(in_progress, 0);
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   535
  } else {
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   536
    assert(in_bytes(PtrQueue::byte_width_of_active()) == 1, "Assumption");
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   537
    __ cmpb(in_progress, 0);
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   538
  }
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   539
  __ jcc(Assembler::equal, _continuation);
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   540
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   541
  // val == null?
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   542
  assert(val()->is_register(), "Precondition.");
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   543
  Register val_reg = val()->as_register();
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   544
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   545
  __ cmpptr(val_reg, (int32_t) NULL_WORD);
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   546
  __ jcc(Assembler::equal, _continuation);
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   547
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   548
  ce->store_parameter(val()->as_register(), 0);
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   549
  __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::g1_pre_barrier_slow_id)));
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   550
  __ jmp(_continuation);
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   551
}
42d9d1010f38 7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
parents: 8729
diff changeset
   552
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 1
diff changeset
   553
jbyte* G1PostBarrierStub::_byte_map_base = NULL;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 1
diff changeset
   554
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 1
diff changeset
   555
jbyte* G1PostBarrierStub::byte_map_base_slow() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 1
diff changeset
   556
  BarrierSet* bs = Universe::heap()->barrier_set();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 1
diff changeset
   557
  assert(bs->is_a(BarrierSet::G1SATBCTLogging),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 1
diff changeset
   558
         "Must be if we're using this.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 1
diff changeset
   559
  return ((G1SATBCardTableModRefBS*)bs)->byte_map_base;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 1
diff changeset
   560
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 1
diff changeset
   561
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 1
diff changeset
   562
void G1PostBarrierStub::emit_code(LIR_Assembler* ce) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 1
diff changeset
   563
  __ bind(_entry);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 1
diff changeset
   564
  assert(addr()->is_register(), "Precondition.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 1
diff changeset
   565
  assert(new_val()->is_register(), "Precondition.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 1
diff changeset
   566
  Register new_val_reg = new_val()->as_register();
1394
apetrusenko
parents: 1066 1374
diff changeset
   567
  __ cmpptr(new_val_reg, (int32_t) NULL_WORD);
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 1
diff changeset
   568
  __ jcc(Assembler::equal, _continuation);
6970
3ac175042286 6992477: fix for 6991512 broke sparc barriers
never
parents: 6745
diff changeset
   569
  ce->store_parameter(addr()->as_pointer_register(), 0);
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 1
diff changeset
   570
  __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::g1_post_barrier_slow_id)));
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 1
diff changeset
   571
  __ jmp(_continuation);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 1
diff changeset
   572
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 1
diff changeset
   573
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 1
diff changeset
   574
#endif // SERIALGC
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 1
diff changeset
   575
/////////////////////////////////////////////////////////////////////////////
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   576
489c9b5090e2 Initial load
duke
parents:
diff changeset
   577
#undef __