| /* |
| * Copyright (c) 2018, 2019, 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. |
| * |
| */ |
| |
| #ifndef SHARE_GC_SHARED_C1_BARRIERSETC1_HPP |
| #define SHARE_GC_SHARED_C1_BARRIERSETC1_HPP |
| |
| #include "c1/c1_Decorators.hpp" |
| #include "c1/c1_LIRGenerator.hpp" |
| #include "c1/c1_Instruction.hpp" |
| #include "c1/c1_LIR.hpp" |
| #include "memory/allocation.hpp" |
| |
| class LIRGenerator; |
| class LIRItem; |
| |
| // The LIRAddressOpr comprises either a LIRItem or a LIR_Opr to describe elements |
| // of an access in the C1 Access API. Both of them allow asking for the opr() which |
| // will correspond to either _item.result() or _opr if there is no _item. |
| class LIRAddressOpr: public StackObj { |
| LIRItem* _item; |
| LIR_Opr _opr; |
| public: |
| LIRAddressOpr(LIRItem& item) : _item(&item), _opr(NULL) {} |
| LIRAddressOpr(LIR_Opr opr) : _item(NULL), _opr(opr) {} |
| LIRAddressOpr(const LIRAddressOpr& other) : _item(other._item), _opr(other._opr) {} |
| |
| LIRItem& item() const { |
| assert(_item != NULL, "sanity"); |
| return *_item; |
| } |
| |
| LIR_Opr opr() const { |
| if (_item == NULL) { |
| return _opr; |
| } else { |
| return _item->result(); |
| } |
| } |
| }; |
| |
| // The LIRAccess class wraps shared context parameters required for performing |
| // the right access in C1. This includes the address of the offset and the decorators. |
| class LIRAccess: public StackObj { |
| LIRGenerator* _gen; |
| DecoratorSet _decorators; |
| LIRAddressOpr _base; |
| LIRAddressOpr _offset; |
| BasicType _type; |
| LIR_Opr _resolved_addr; |
| CodeEmitInfo* _patch_emit_info; |
| CodeEmitInfo* _access_emit_info; |
| |
| public: |
| LIRAccess(LIRGenerator* gen, DecoratorSet decorators, |
| LIRAddressOpr base, LIRAddressOpr offset, BasicType type, |
| CodeEmitInfo* patch_emit_info = NULL, CodeEmitInfo* access_emit_info = NULL) : |
| _gen(gen), |
| _decorators(AccessInternal::decorator_fixup(decorators)), |
| _base(base), |
| _offset(offset), |
| _type(type), |
| _resolved_addr(NULL), |
| _patch_emit_info(patch_emit_info), |
| _access_emit_info(access_emit_info) {} |
| |
| void load_base() { _base.item().load_item(); } |
| void load_offset() { _offset.item().load_nonconstant(); } |
| |
| void load_address() { |
| load_base(); |
| load_offset(); |
| } |
| |
| LIRGenerator* gen() const { return _gen; } |
| CodeEmitInfo*& patch_emit_info() { return _patch_emit_info; } |
| CodeEmitInfo*& access_emit_info() { return _access_emit_info; } |
| LIRAddressOpr& base() { return _base; } |
| LIRAddressOpr& offset() { return _offset; } |
| BasicType type() const { return _type; } |
| LIR_Opr resolved_addr() const { return _resolved_addr; } |
| void set_resolved_addr(LIR_Opr addr) { _resolved_addr = addr; } |
| bool is_oop() const { return _type == T_ARRAY || _type == T_OBJECT; } |
| DecoratorSet decorators() const { return _decorators; } |
| void clear_decorators(DecoratorSet ds) { _decorators &= ~ds; } |
| bool is_raw() const { return (_decorators & AS_RAW) != 0; } |
| }; |
| |
| // The BarrierSetC1 class is the main entry point for the GC backend of the Access API in C1. |
| // It is called by the LIRGenerator::access_* functions, which is the main entry poing for |
| // access calls in C1. |
| |
| class BarrierSetC1: public CHeapObj<mtGC> { |
| protected: |
| virtual LIR_Opr resolve_address(LIRAccess& access, bool resolve_in_register); |
| |
| virtual void generate_referent_check(LIRAccess& access, LabelObj* cont); |
| |
| // Accesses with resolved address |
| virtual void store_at_resolved(LIRAccess& access, LIR_Opr value); |
| virtual void load_at_resolved(LIRAccess& access, LIR_Opr result); |
| |
| virtual LIR_Opr atomic_cmpxchg_at_resolved(LIRAccess& access, LIRItem& cmp_value, LIRItem& new_value); |
| |
| virtual LIR_Opr atomic_xchg_at_resolved(LIRAccess& access, LIRItem& value); |
| virtual LIR_Opr atomic_add_at_resolved(LIRAccess& access, LIRItem& value); |
| |
| public: |
| virtual void store_at(LIRAccess& access, LIR_Opr value); |
| virtual void load_at(LIRAccess& access, LIR_Opr result); |
| virtual void load(LIRAccess& access, LIR_Opr result); |
| |
| virtual LIR_Opr atomic_cmpxchg_at(LIRAccess& access, LIRItem& cmp_value, LIRItem& new_value); |
| |
| virtual LIR_Opr atomic_xchg_at(LIRAccess& access, LIRItem& value); |
| virtual LIR_Opr atomic_add_at(LIRAccess& access, LIRItem& value); |
| |
| virtual void generate_c1_runtime_stubs(BufferBlob* buffer_blob) {} |
| }; |
| |
| #endif // SHARE_GC_SHARED_C1_BARRIERSETC1_HPP |