139 lines
4.7 KiB
C++
139 lines
4.7 KiB
C++
/*
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* Copyright (c) 2018, 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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#ifndef SHARE_GC_G1_C1_G1BARRIERSETC1_HPP
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#define SHARE_GC_G1_C1_G1BARRIERSETC1_HPP
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#include "c1/c1_CodeStubs.hpp"
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#include "gc/shared/c1/modRefBarrierSetC1.hpp"
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class G1PreBarrierStub: public CodeStub {
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friend class G1BarrierSetC1;
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private:
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bool _do_load;
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LIR_Opr _addr;
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LIR_Opr _pre_val;
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LIR_PatchCode _patch_code;
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CodeEmitInfo* _info;
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public:
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// Version that _does_ generate a load of the previous value from addr.
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// addr (the address of the field to be read) must be a LIR_Address
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// pre_val (a temporary register) must be a register;
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G1PreBarrierStub(LIR_Opr addr, LIR_Opr pre_val, LIR_PatchCode patch_code, CodeEmitInfo* info) :
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_do_load(true), _addr(addr), _pre_val(pre_val),
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_patch_code(patch_code), _info(info)
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{
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assert(_pre_val->is_register(), "should be temporary register");
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assert(_addr->is_address(), "should be the address of the field");
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}
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// Version that _does not_ generate load of the previous value; the
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// previous value is assumed to have already been loaded into pre_val.
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G1PreBarrierStub(LIR_Opr pre_val) :
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_do_load(false), _addr(LIR_OprFact::illegalOpr), _pre_val(pre_val),
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_patch_code(lir_patch_none), _info(NULL)
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{
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assert(_pre_val->is_register(), "should be a register");
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}
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LIR_Opr addr() const { return _addr; }
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LIR_Opr pre_val() const { return _pre_val; }
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LIR_PatchCode patch_code() const { return _patch_code; }
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CodeEmitInfo* info() const { return _info; }
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bool do_load() const { return _do_load; }
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virtual void emit_code(LIR_Assembler* e);
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virtual void visit(LIR_OpVisitState* visitor) {
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if (_do_load) {
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// don't pass in the code emit info since it's processed in the fast
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// path
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if (_info != NULL)
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visitor->do_slow_case(_info);
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else
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visitor->do_slow_case();
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visitor->do_input(_addr);
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visitor->do_temp(_pre_val);
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} else {
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visitor->do_slow_case();
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visitor->do_input(_pre_val);
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}
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}
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#ifndef PRODUCT
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virtual void print_name(outputStream* out) const { out->print("G1PreBarrierStub"); }
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#endif // PRODUCT
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};
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class G1PostBarrierStub: public CodeStub {
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friend class G1BarrierSetC1;
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private:
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LIR_Opr _addr;
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LIR_Opr _new_val;
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public:
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// addr (the address of the object head) and new_val must be registers.
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G1PostBarrierStub(LIR_Opr addr, LIR_Opr new_val): _addr(addr), _new_val(new_val) { }
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LIR_Opr addr() const { return _addr; }
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LIR_Opr new_val() const { return _new_val; }
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virtual void emit_code(LIR_Assembler* e);
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virtual void visit(LIR_OpVisitState* visitor) {
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// don't pass in the code emit info since it's processed in the fast path
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visitor->do_slow_case();
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visitor->do_input(_addr);
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visitor->do_input(_new_val);
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}
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#ifndef PRODUCT
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virtual void print_name(outputStream* out) const { out->print("G1PostBarrierStub"); }
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#endif // PRODUCT
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};
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class CodeBlob;
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class G1BarrierSetC1 : public ModRefBarrierSetC1 {
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protected:
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CodeBlob* _pre_barrier_c1_runtime_code_blob;
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CodeBlob* _post_barrier_c1_runtime_code_blob;
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virtual void pre_barrier(LIRAccess& access, LIR_Opr addr_opr,
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LIR_Opr pre_val, CodeEmitInfo* info);
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virtual void post_barrier(LIRAccess& access, LIR_OprDesc* addr, LIR_OprDesc* new_val);
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virtual void load_at_resolved(LIRAccess& access, LIR_Opr result);
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public:
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G1BarrierSetC1()
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: _pre_barrier_c1_runtime_code_blob(NULL),
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_post_barrier_c1_runtime_code_blob(NULL) {}
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CodeBlob* pre_barrier_c1_runtime_code_blob() { return _pre_barrier_c1_runtime_code_blob; }
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CodeBlob* post_barrier_c1_runtime_code_blob() { return _post_barrier_c1_runtime_code_blob; }
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virtual void generate_c1_runtime_stubs(BufferBlob* buffer_blob);
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};
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#endif // SHARE_GC_G1_C1_G1BARRIERSETC1_HPP
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