1 /*
 2  * Copyright (c) 2017, 2025, 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 SHARE_VM_CI_CIINLINEKLASS_HPP
26 #define SHARE_VM_CI_CIINLINEKLASS_HPP
27 
28 #include "ci/ciConstantPoolCache.hpp"
29 #include "ci/ciEnv.hpp"
30 #include "ci/ciFlags.hpp"
31 #include "ci/ciInstanceKlass.hpp"
32 #include "ci/ciSymbol.hpp"
33 #include "oops/inlineKlass.hpp"
34 
35 // ciInlineKlass
36 //
37 // Specialized ciInstanceKlass for inline types.
38 class ciInlineKlass : public ciInstanceKlass {
39   CI_PACKAGE_ACCESS
40 
41 private:
42 
43   InlineKlass* to_InlineKlass() const {
44     return InlineKlass::cast(get_Klass());
45   }
46 
47 protected:
48   ciInlineKlass(Klass* h_k) : ciInstanceKlass(h_k) {
49     assert(is_final(), "InlineKlass must be final");
50   };
51 
52   ciInlineKlass(ciSymbol* name, jobject loader) :
53     ciInstanceKlass(name, loader, T_OBJECT) {}
54 
55   const char* type_string() { return "ciInlineKlass"; }
56 
57 public:
58   bool is_inlinetype() const { return true; }
59 
60   // Inline type fields
61   int payload_offset() const;
62 
63   bool maybe_flat_in_array() const;
64   bool can_be_passed_as_fields() const;
65   bool can_be_returned_as_fields() const;
66   bool is_empty();
67   int inline_arg_slots();
68   bool contains_oops() const;
69   int oop_count() const;
70   address pack_handler() const;
71   address unpack_handler() const;
72   InlineKlass* get_InlineKlass() const;
73   int nullable_size_in_bytes() const;
74   bool has_non_atomic_layout() const;
75   bool has_atomic_layout() const;
76   bool has_nullable_atomic_layout() const;
77   int null_marker_offset_in_payload() const;
78   BasicType atomic_size_to_basic_type(bool null_free) const;
79 
80   bool must_be_atomic() const;
81   bool is_naturally_atomic(bool null_free);
82 };
83 
84 #endif // SHARE_VM_CI_CIINLINEKLASS_HPP