rev 52354 : 8213199: GC abstraction for Assembler::needs_explicit_null_check()
1 /*
2 * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef CPU_AARCH64_GC_SHARED_BARRIERSETASSEMBLER_AARCH64_HPP
26 #define CPU_AARCH64_GC_SHARED_BARRIERSETASSEMBLER_AARCH64_HPP
27
28 #include "asm/macroAssembler.hpp"
29 #include "memory/allocation.hpp"
30 #include "oops/access.hpp"
31
32 class BarrierSetAssembler: public CHeapObj<mtGC> {
33 private:
34 void incr_allocated_bytes(MacroAssembler* masm,
35 Register var_size_in_bytes, int con_size_in_bytes,
36 Register t1 = noreg);
37
38 public:
39 virtual void arraycopy_prologue(MacroAssembler* masm, DecoratorSet decorators, bool is_oop,
40 Register addr, Register count, RegSet saved_regs) {}
41 virtual void arraycopy_epilogue(MacroAssembler* masm, DecoratorSet decorators, bool is_oop,
42 Register start, Register end, Register tmp, RegSet saved_regs) {}
43 virtual void load_at(MacroAssembler* masm, DecoratorSet decorators, BasicType type,
44 Register dst, Address src, Register tmp1, Register tmp_thread);
45 virtual void store_at(MacroAssembler* masm, DecoratorSet decorators, BasicType type,
46 Address dst, Register val, Register tmp1, Register tmp2);
47
48 virtual void obj_equals(MacroAssembler* masm,
49 Register obj1, Register obj2);
50
51 virtual void resolve(MacroAssembler* masm, DecoratorSet decorators, Register obj) {
52 // Default implementation does not need to do anything.
53 }
54
55 virtual void try_resolve_jobject_in_native(MacroAssembler* masm, Register jni_env,
56 Register obj, Register tmp, Label& slowpath);
57
58 virtual void tlab_allocate(MacroAssembler* masm,
59 Register obj, // result: pointer to object after successful allocation
60 Register var_size_in_bytes, // object size in bytes if unknown at compile time; invalid otherwise
61 int con_size_in_bytes, // object size in bytes if known at compile time
62 Register t1, // temp register
63 Register t2, // temp register
64 Label& slow_case // continuation point if fast allocation fails
65 );
66
67 void eden_allocate(MacroAssembler* masm,
68 Register obj, // result: pointer to object after successful allocation
69 Register var_size_in_bytes, // object size in bytes if unknown at compile time; invalid otherwise
70 int con_size_in_bytes, // object size in bytes if known at compile time
71 Register t1, // temp register
72 Label& slow_case // continuation point if fast allocation fails
73 );
74 virtual void barrier_stubs_init() {}
75
76 virtual bool needs_explicit_null_check(intptr_t offset) const;
77 };
78
79 #endif // CPU_AARCH64_GC_SHARED_BARRIERSETASSEMBLER_AARCH64_HPP
--- EOF ---