author | lfoltan |
Mon, 23 Sep 2019 14:49:04 -0400 | |
changeset 58273 | 08a5148e7c4e |
parent 58219 | bc0648405d67 |
child 58679 | 9c3209ff7550 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2018, 2019, Red Hat, Inc. All rights reserved. |
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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_LIRAssembler.hpp" |
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#include "c1/c1_MacroAssembler.hpp" |
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#include "gc/shenandoah/shenandoahBarrierSet.hpp" |
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#include "gc/shenandoah/shenandoahBarrierSetAssembler.hpp" |
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#include "gc/shenandoah/c1/shenandoahBarrierSetC1.hpp" |
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#define __ masm->masm()-> |
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void LIR_OpShenandoahCompareAndSwap::emit_code(LIR_Assembler* masm) { |
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Register addr = _addr->as_register_lo(); |
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Register newval = _new_value->as_register(); |
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Register cmpval = _cmp_value->as_register(); |
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Register tmp1 = _tmp1->as_register(); |
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Register tmp2 = _tmp2->as_register(); |
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Register result = result_opr()->as_register(); |
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ShenandoahBarrierSet::assembler()->storeval_barrier(masm->masm(), newval, rscratch2); |
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if (UseCompressedOops) { |
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__ encode_heap_oop(tmp1, cmpval); |
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cmpval = tmp1; |
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__ encode_heap_oop(tmp2, newval); |
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newval = tmp2; |
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} |
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ShenandoahBarrierSet::assembler()->cmpxchg_oop(masm->masm(), addr, cmpval, newval, /*acquire*/ false, /*release*/ true, /*weak*/ false, /*is_cae*/ false, result); |
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} |
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#undef __ |
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#ifdef ASSERT |
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#define __ gen->lir(__FILE__, __LINE__)-> |
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#else |
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#define __ gen->lir()-> |
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#endif |
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LIR_Opr ShenandoahBarrierSetC1::atomic_cmpxchg_at_resolved(LIRAccess& access, LIRItem& cmp_value, LIRItem& new_value) { |
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BasicType bt = access.type(); |
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if (access.is_oop()) { |
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LIRGenerator *gen = access.gen(); |
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if (ShenandoahSATBBarrier) { |
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pre_barrier(gen, access.access_emit_info(), access.decorators(), access.resolved_addr(), |
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LIR_OprFact::illegalOpr /* pre_val */); |
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} |
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if (ShenandoahCASBarrier) { |
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cmp_value.load_item(); |
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new_value.load_item(); |
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LIR_Opr t1 = gen->new_register(T_OBJECT); |
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LIR_Opr t2 = gen->new_register(T_OBJECT); |
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LIR_Opr addr = access.resolved_addr()->as_address_ptr()->base(); |
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LIR_Opr result = gen->new_register(T_INT); |
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__ append(new LIR_OpShenandoahCompareAndSwap(addr, cmp_value.result(), new_value.result(), t1, t2, result)); |
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return result; |
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} |
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} |
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return BarrierSetC1::atomic_cmpxchg_at_resolved(access, cmp_value, new_value); |
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} |
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LIR_Opr ShenandoahBarrierSetC1::atomic_xchg_at_resolved(LIRAccess& access, LIRItem& value) { |
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LIRGenerator* gen = access.gen(); |
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BasicType type = access.type(); |
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LIR_Opr result = gen->new_register(type); |
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value.load_item(); |
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LIR_Opr value_opr = value.result(); |
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if (access.is_oop()) { |
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value_opr = storeval_barrier(access.gen(), value_opr, access.access_emit_info(), access.decorators()); |
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} |
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assert(type == T_INT || is_reference_type(type) LP64_ONLY( || type == T_LONG ), "unexpected type"); |
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LIR_Opr tmp = gen->new_register(T_INT); |
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__ xchg(access.resolved_addr(), value_opr, result, tmp); |
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if (access.is_oop()) { |
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result = load_reference_barrier(access.gen(), result, LIR_OprFact::addressConst(0)); |
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LIR_Opr tmp = gen->new_register(type); |
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__ move(result, tmp); |
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8229470: Shenandoah: Fix C1 getAndSetObject() failure
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105 |
result = tmp; |
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8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
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106 |
if (ShenandoahSATBBarrier) { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
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107 |
pre_barrier(access.gen(), access.access_emit_info(), access.decorators(), LIR_OprFact::illegalOpr, |
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8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
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108 |
result /* pre_val */); |
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109 |
} |
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110 |
} |
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111 |
|
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112 |
return result; |
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113 |
} |