1 /*
2 * Copyright (c) 2026, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2018, 2021, Red Hat, Inc. All rights reserved.
4 * Copyright Amazon.com Inc. or its affiliates. All Rights Reserved.
5 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 *
7 * This code is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License version 2 only, as
9 * published by the Free Software Foundation.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 *
25 */
26
27 #ifndef CPU_X86_GC_SHENANDOAH_SHENANDOAHBARRIERSETASSEMBLER_X86_HPP
28 #define CPU_X86_GC_SHENANDOAH_SHENANDOAHBARRIERSETASSEMBLER_X86_HPP
29
30 #include "asm/macroAssembler.hpp"
31 #include "gc/shared/barrierSetAssembler.hpp"
32 #include "gc/shenandoah/shenandoahBarrierSet.hpp"
33
34 #ifdef COMPILER1
35 class LIR_Assembler;
36 class ShenandoahKeepaliveBarrierStub;
37 class ShenandoahLoadReferenceBarrierStub;
38 class StubAssembler;
39 #endif
40 #ifdef COMPILER2
41 class MachNode;
42 #endif
43 class StubCodeGenerator;
44
45 class ShenandoahBarrierSetAssembler: public BarrierSetAssembler {
46 private:
47
48 void satb_barrier(MacroAssembler* masm,
49 Register obj,
50 Register pre_val,
51 Register tmp);
52
53 void card_barrier(MacroAssembler* masm, Register obj);
54
55 void gen_write_ref_array_post_barrier(MacroAssembler* masm, DecoratorSet decorators,
56 Register addr, Register count,
57 Register tmp);
58
59 public:
60
61 void load_reference_barrier(MacroAssembler* masm, Register dst, Address src, DecoratorSet decorators);
62
63 virtual void arraycopy_prologue(MacroAssembler* masm, DecoratorSet decorators, BasicType type,
64 Register src, Register dst, Register count);
65 virtual void arraycopy_epilogue(MacroAssembler* masm, DecoratorSet decorators, BasicType type,
66 Register src, Register dst, Register count);
67 virtual void load_at(MacroAssembler* masm, DecoratorSet decorators, BasicType type,
68 Register dst, Address src, Register tmp1);
69 virtual void store_at(MacroAssembler* masm, DecoratorSet decorators, BasicType type,
70 Address dst, Register val, Register tmp1, Register tmp2, Register tmp3);
71 virtual void try_resolve_jobject_in_native(MacroAssembler* masm, Register jni_env,
72 Register obj, Register tmp, Label& slowpath);
73 virtual void try_peek_weak_handle_in_nmethod(MacroAssembler* masm, Register weak_handle, Register obj, Label& slowpath);
74 virtual void check_oop(MacroAssembler* masm, Register obj, Register tmp1, Register tmp2, Label& L_error);
75
76 // Barrier hotpatching
77 static address parse_jump_address(address pc);
78 static void insert_patchable_nop(address pc);
79 static bool is_patchable_nop(address pc);
80 static void insert_patchable_jump(address pc, address target_pc);
81 static bool is_patchable_jump(address pc, address target_pc);
82
83 #ifdef COMPILER1
84 void keepalive_barrier_c1_stub(LIR_Assembler* ce, ShenandoahKeepaliveBarrierStub* stub);
85 void keepalive_barrier_c1_runtime_stub(StubAssembler* sasm);
86
87 void load_reference_barrier_c1_stub(LIR_Assembler* ce, ShenandoahLoadReferenceBarrierStub* stub);
88 void load_reference_barrier_c1_runtime_stub(StubAssembler* sasm, DecoratorSet decorators);
89 #endif
90
91 #ifdef COMPILER2
92 // Entry points from Matcher
93 void load_c2(const MachNode* node, MacroAssembler* masm, Register dst, Address src, bool narrow);
94 void store_c2(const MachNode* node, MacroAssembler* masm,
95 Address dst, bool dst_narrow, Register src, bool src_narrow, Register tmp);
96 void compare_and_set_c2(const MachNode* node, MacroAssembler* masm, Register res, Address addr, Register oldval, Register newval,
97 Register tmp, bool narrow);
98 void get_and_set_c2(const MachNode* node, MacroAssembler* masm, Register newval, Address addr, Register tmp, bool narrow);
99 #endif
100 };
101
102 #endif // CPU_X86_GC_SHENANDOAH_SHENANDOAHBARRIERSETASSEMBLER_X86_HPP