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4aa866af LS |
1 | /* This testcase is part of GDB, the GNU debugger. |
2 | ||
1d506c26 | 3 | Copyright 2019-2024 Free Software Foundation, Inc. |
4aa866af LS |
4 | |
5 | This program is free software; you can redistribute it and/or modify | |
6 | it under the terms of the GNU General Public License as published by | |
7 | the Free Software Foundation; either version 3 of the License, or | |
8 | (at your option) any later version. | |
9 | ||
10 | This program is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | GNU General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License | |
16 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
17 | ||
18 | #include <cstdint> | |
19 | #include <cstdio> | |
20 | #include <cstdlib> | |
21 | #include <cassert> | |
22 | ||
23 | /* A simple structure with a single integer field. Should be returned in | |
24 | a register. */ | |
25 | struct SimpleBase | |
26 | { | |
27 | SimpleBase (int32_t x) : x (x) {} | |
28 | ||
29 | int32_t x; | |
30 | }; | |
31 | ||
32 | /* A simple structure derived from the simple base. Should be returned in | |
33 | a register. */ | |
34 | struct SimpleDerived : public SimpleBase | |
35 | { | |
36 | SimpleDerived (int32_t x) : SimpleBase (x) {} | |
37 | }; | |
38 | ||
39 | /* A structure derived from the simple base with a non-trivial destructor. | |
40 | Should be returned on the stack. */ | |
41 | struct NonTrivialDestructorDerived : public SimpleBase | |
42 | { | |
43 | NonTrivialDestructorDerived (int32_t x) : SimpleBase (x) {} | |
44 | ~NonTrivialDestructorDerived() { x = 1; } | |
45 | }; | |
46 | ||
47 | /* A structure with unaligned fields. Should be returned on the stack. */ | |
48 | struct UnalignedFields | |
49 | { | |
50 | UnalignedFields (int32_t x, double y) : x (x), y (y) {} | |
51 | ||
52 | int32_t x; | |
53 | double y; | |
54 | } __attribute__((packed)); | |
55 | ||
56 | /* A structure with unaligned fields in its base class. Should be | |
57 | returned on the stack. */ | |
58 | struct UnalignedFieldsInBase : public UnalignedFields | |
59 | { | |
60 | UnalignedFieldsInBase (int32_t x, double y, int32_t x2) | |
61 | : UnalignedFields (x, y), x2 (x2) {} | |
62 | ||
63 | int32_t x2; | |
64 | }; | |
65 | ||
a59240a4 TT |
66 | struct Bitfields |
67 | { | |
68 | Bitfields(unsigned int x, unsigned int y) | |
69 | : fld(x), fld2(y) | |
70 | {} | |
71 | ||
72 | unsigned fld : 7; | |
73 | unsigned fld2 : 7; | |
74 | }; | |
75 | ||
4aa866af LS |
76 | class Foo |
77 | { | |
78 | public: | |
79 | SimpleBase | |
80 | return_simple_base (int32_t x) | |
81 | { | |
82 | assert (this->tag == EXPECTED_TAG); | |
83 | return SimpleBase (x); | |
84 | } | |
85 | ||
86 | SimpleDerived | |
87 | return_simple_derived (int32_t x) | |
88 | { | |
89 | assert (this->tag == EXPECTED_TAG); | |
90 | return SimpleDerived (x); | |
91 | } | |
92 | ||
93 | NonTrivialDestructorDerived | |
94 | return_non_trivial_destructor (int32_t x) | |
95 | { | |
96 | assert (this->tag == EXPECTED_TAG); | |
97 | return NonTrivialDestructorDerived (x); | |
98 | } | |
99 | ||
100 | UnalignedFields | |
101 | return_unaligned (int32_t x, double y) | |
102 | { | |
103 | assert (this->tag == EXPECTED_TAG); | |
104 | return UnalignedFields (x, y); | |
105 | } | |
106 | ||
107 | UnalignedFieldsInBase | |
108 | return_unaligned_in_base (int32_t x, double y, int32_t x2) | |
109 | { | |
110 | assert (this->tag == EXPECTED_TAG); | |
111 | return UnalignedFieldsInBase (x, y, x2); | |
112 | } | |
113 | ||
a59240a4 TT |
114 | Bitfields |
115 | return_bitfields (unsigned int x, unsigned int y) | |
116 | { | |
117 | assert (this->tag == EXPECTED_TAG); | |
118 | return Bitfields(x, y); | |
119 | } | |
120 | ||
4aa866af LS |
121 | private: |
122 | /* Use a tag to detect if the "this" value is correct. */ | |
123 | static const int EXPECTED_TAG = 0xF00F00F0; | |
124 | int tag = EXPECTED_TAG; | |
125 | }; | |
126 | ||
127 | int | |
128 | main (int argc, char *argv[]) | |
129 | { | |
130 | Foo foo; | |
131 | foo.return_simple_base(1); | |
132 | foo.return_simple_derived(2); | |
133 | foo.return_non_trivial_destructor(3); | |
134 | foo.return_unaligned(4, 5); | |
135 | foo.return_unaligned_in_base(6, 7, 8); | |
a59240a4 | 136 | foo.return_bitfields(23, 74); |
4aa866af LS |
137 | return 0; // break-here |
138 | } |