8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
Reviewed-by: kvn, roland, shade, coleenp, lmesnik, pliden, jgeorge, ihse, erikj
Contributed-by: Christine Flood <chf@redhat.com>, Aleksey Shipilev <shade@redhat.com>, Roland Westrelin <rwestrel@redhat.com>, Zhenygu Gu <zgu@redhat.com>, Andrew Haley <aph@redhat.com>, Andrew Dinn <adinn@redhat.com>, Mario Torre <mtorre@redhat.com>, Roman Kennke <rkennke@redhat.com>
/*
* Copyright (c) 2018, Red Hat, Inc. All rights reserved.
*
* 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.
*
*/
#ifndef CPU_AARCH64_GC_SHENANDOAH_SHENANDOAHBARRIERSETASSEMBLER_AARCH64_HPP
#define CPU_AARCH64_GC_SHENANDOAH_SHENANDOAHBARRIERSETASSEMBLER_AARCH64_HPP
#include "asm/macroAssembler.hpp"
#include "gc/shared/barrierSetAssembler.hpp"
#ifdef COMPILER1
class LIR_Assembler;
class ShenandoahPreBarrierStub;
class ShenandoahWriteBarrierStub;
class StubAssembler;
class StubCodeGenerator;
#endif
class ShenandoahBarrierSetAssembler: public BarrierSetAssembler {
private:
static address _shenandoah_wb;
void satb_write_barrier_pre(MacroAssembler* masm,
Register obj,
Register pre_val,
Register thread,
Register tmp,
bool tosca_live,
bool expand_call);
void shenandoah_write_barrier_pre(MacroAssembler* masm,
Register obj,
Register pre_val,
Register thread,
Register tmp,
bool tosca_live,
bool expand_call);
void read_barrier(MacroAssembler* masm, Register dst);
void read_barrier_impl(MacroAssembler* masm, Register dst);
void read_barrier_not_null(MacroAssembler* masm, Register dst);
void read_barrier_not_null_impl(MacroAssembler* masm, Register dst);
void write_barrier(MacroAssembler* masm, Register dst);
void write_barrier_impl(MacroAssembler* masm, Register dst);
void storeval_barrier(MacroAssembler* masm, Register dst, Register tmp);
void asm_acmp_barrier(MacroAssembler* masm, Register op1, Register op2);
address generate_shenandoah_wb(StubCodeGenerator* cgen);
public:
static address shenandoah_wb();
#ifdef COMPILER1
void gen_pre_barrier_stub(LIR_Assembler* ce, ShenandoahPreBarrierStub* stub);
void gen_write_barrier_stub(LIR_Assembler* ce, ShenandoahWriteBarrierStub* stub);
void generate_c1_pre_barrier_runtime_stub(StubAssembler* sasm);
#endif
virtual void arraycopy_prologue(MacroAssembler* masm, DecoratorSet decorators, bool is_oop,
Register addr, Register count, RegSet saved_regs);
virtual void arraycopy_epilogue(MacroAssembler* masm, DecoratorSet decorators, bool is_oop,
Register start, Register end, Register tmp, RegSet saved_regs);
virtual void load_at(MacroAssembler* masm, DecoratorSet decorators, BasicType type,
Register dst, Address src, Register tmp1, Register tmp_thread);
virtual void store_at(MacroAssembler* masm, DecoratorSet decorators, BasicType type,
Address dst, Register val, Register tmp1, Register tmp2);
virtual void obj_equals(MacroAssembler* masm, Register src1, Register src2);
virtual void resolve(MacroAssembler* masm, DecoratorSet decorators, Register obj);
virtual void tlab_allocate(MacroAssembler* masm, Register obj,
Register var_size_in_bytes,
int con_size_in_bytes,
Register t1,
Register t2,
Label& slow_case);
void cmpxchg_oop(MacroAssembler* masm, Register addr, Register expected, Register new_val,
bool acquire, bool release, bool weak, bool encode,
Register tmp1, Register tmp2, Register tmp3 = rscratch2,
Register result = noreg);
virtual void barrier_stubs_init();
};
#endif // CPU_AARCH64_GC_SHENANDOAH_SHENANDOAHBARRIERSETASSEMBLER_AARCH64_HPP