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/*
* Copyright (c) 2015, 2023, 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_Z_C2_ZBARRIERSETC2_HPP
#define SHARE_GC_Z_C2_ZBARRIERSETC2_HPP
#include "gc/shared/c2/barrierSetC2.hpp"
#include "memory/allocation.hpp"
#include "opto/node.hpp"
#include "utilities/growableArray.hpp"
const uint8_t ZBarrierStrong = 1;
const uint8_t ZBarrierWeak = 2;
const uint8_t ZBarrierPhantom = 4;
const uint8_t ZBarrierNoKeepalive = 8;
const uint8_t ZBarrierNative = 16;
const uint8_t ZBarrierElided = 32;
class Block;
class MachNode;
class MacroAssembler;
class ZBarrierStubC2 : public ArenaObj {
protected:
const MachNode* _node;
Label _entry;
Label _continuation;
static void register_stub(ZBarrierStubC2* stub);
static void inc_trampoline_stubs_count();
static int trampoline_stubs_count();
static int stubs_start_offset();
ZBarrierStubC2(const MachNode* node);
public:
RegMask& live() const;
Label* entry();
Label* continuation();
virtual Register result() const = 0;
virtual void emit_code(MacroAssembler& masm) = 0;
};
class ZLoadBarrierStubC2 : public ZBarrierStubC2 {
private:
const Address _ref_addr;
const Register _ref;
protected:
ZLoadBarrierStubC2(const MachNode* node, Address ref_addr, Register ref);
public:
static ZLoadBarrierStubC2* create(const MachNode* node, Address ref_addr, Register ref);
Address ref_addr() const;
Register ref() const;
address slow_path() const;
virtual Register result() const;
virtual void emit_code(MacroAssembler& masm);
};
class ZStoreBarrierStubC2 : public ZBarrierStubC2 {
private:
const Address _ref_addr;
const Register _new_zaddress;
const Register _new_zpointer;
const bool _is_native;
const bool _is_atomic;
protected:
ZStoreBarrierStubC2(const MachNode* node, Address ref_addr, Register new_zaddress, Register new_zpointer, bool is_native, bool is_atomic);
public:
static ZStoreBarrierStubC2* create(const MachNode* node, Address ref_addr, Register new_zaddress, Register new_zpointer, bool is_native, bool is_atomic);
Address ref_addr() const;
Register new_zaddress() const;
Register new_zpointer() const;
bool is_native() const;
bool is_atomic() const;
virtual Register result() const;
virtual void emit_code(MacroAssembler& masm);
};
class ZBarrierSetC2 : public BarrierSetC2 {
private:
void compute_liveness_at_stubs() const;
void analyze_dominating_barriers_impl(Node_List& accesses, Node_List& access_dominators) const;
void analyze_dominating_barriers() const;
protected:
virtual Node* store_at_resolved(C2Access& access, C2AccessValue& val) const;
virtual Node* load_at_resolved(C2Access& access, const Type* val_type) const;
virtual Node* atomic_cmpxchg_val_at_resolved(C2AtomicParseAccess& access,
Node* expected_val,
Node* new_val,
const Type* val_type) const;
virtual Node* atomic_cmpxchg_bool_at_resolved(C2AtomicParseAccess& access,
Node* expected_val,
Node* new_val,
const Type* value_type) const;
virtual Node* atomic_xchg_at_resolved(C2AtomicParseAccess& access,
Node* new_val,
const Type* val_type) const;
public:
virtual void* create_barrier_state(Arena* comp_arena) const;
virtual bool array_copy_requires_gc_barriers(bool tightly_coupled_alloc,
BasicType type,
bool is_clone,
bool is_clone_instance,
ArrayCopyPhase phase) const;
virtual void clone_at_expansion(PhaseMacroExpand* phase,
ArrayCopyNode* ac) const;
virtual void late_barrier_analysis() const;
virtual int estimate_stub_size() const;
virtual void emit_stubs(CodeBuffer& cb) const;
virtual void eliminate_gc_barrier(PhaseMacroExpand* macro, Node* node) const;
virtual void eliminate_gc_barrier_data(Node* node) const;
#ifndef PRODUCT
virtual void dump_barrier_data(const MachNode* mach, outputStream* st) const;
#endif
};
#endif // SHARE_GC_Z_C2_ZBARRIERSETC2_HPP
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