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1d506c26 | 1 | # Copyright 2018-2024 Free Software Foundation, Inc. |
007e1530 TT |
2 | |
3 | # This program is free software; you can redistribute it and/or modify | |
4 | # it under the terms of the GNU General Public License as published by | |
5 | # the Free Software Foundation; either version 3 of the License, or | |
6 | # (at your option) any later version. | |
7 | # | |
8 | # This program is distributed in the hope that it will be useful, | |
9 | # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | # GNU General Public License for more details. | |
12 | # | |
13 | # You should have received a copy of the GNU General Public License | |
14 | # along with this program. If not, see <http://www.gnu.org/licenses/>. | |
15 | ||
16 | # This file is part of the gdb testsuite | |
17 | ||
18 | # This tests that C++ alignof works in gdb, and that it agrees with | |
19 | # the compiler. | |
20 | ||
0b94d2b9 | 21 | require allow_cplus_tests |
007e1530 TT |
22 | |
23 | # The types we're going to test. | |
24 | ||
25 | set typelist { | |
26 | char {unsigned char} | |
27 | short {unsigned short} | |
28 | int {unsigned int} | |
29 | long {unsigned long} | |
30 | {long long} {unsigned long long} | |
31 | float | |
32 | double {long double} | |
33 | empty | |
34 | bigenum | |
35 | vstruct | |
36 | bfstruct | |
37 | arrstruct | |
38 | derived | |
39 | derived2 | |
40 | } | |
41 | ||
42 | if {[has_int128_cxx]} { | |
43 | # Note we don't check "unsigned __int128" yet because at least gcc | |
44 | # canonicalizes the name to "__int128 unsigned", and there isn't a | |
45 | # c-exp.y production for this. | |
46 | # https://sourceware.org/bugzilla/show_bug.cgi?id=20991 | |
47 | lappend typelist __int128 | |
48 | } | |
49 | ||
50 | # Create the test file. | |
51 | ||
52 | set filename [standard_output_file align.cc] | |
53 | set outfile [open $filename w] | |
54 | ||
55 | # Prologue. | |
56 | puts $outfile { | |
57 | template<typename T, typename U> | |
58 | struct align_pair | |
59 | { | |
60 | T one; | |
61 | U two; | |
62 | }; | |
63 | ||
64 | template<typename T, typename U> | |
65 | struct align_union | |
66 | { | |
67 | T one; | |
68 | U two; | |
69 | }; | |
70 | ||
71 | enum bigenum { VALUE = 0xffffffffull }; | |
72 | ||
73 | struct empty { }; | |
74 | ||
75 | struct vstruct { virtual ~vstruct() {} char c; }; | |
76 | ||
77 | struct bfstruct { unsigned b : 3; }; | |
78 | ||
79 | struct arrstruct { short fld[7]; }; | |
80 | ||
81 | unsigned a_int3 = alignof (int[3]); | |
82 | ||
5335b043 TV |
83 | #if defined __GNUC__ && !defined __clang__ |
84 | /* As a GNU C extension, GCC allows void pointer arithmetic, with | |
85 | sizeof (void) == 1. | |
86 | Another GNU C extension is __alignof__, which can be used to get | |
87 | __alignof__ (void), which is also 1. This is unavailabe on clang. | |
88 | GCC used to only warn for alignof (void), but starting with GCC 12.1, | |
89 | as well as GCC 11.3, it will generate an error (note that using | |
90 | -std=gnu++11 does not prevent the error). | |
91 | So we avoid using alignof, and use __alignof__ instead. */ | |
92 | unsigned a_void = __alignof__ (void); | |
93 | #else | |
94 | /* No support for __alignof__ (void), hardcode value. */ | |
95 | unsigned a_void = 1; | |
c14b4913 | 96 | #endif |
007e1530 TT |
97 | |
98 | struct base { char c; }; | |
99 | struct derived : public virtual base { int i; }; | |
100 | ||
101 | struct b2 : public virtual base { char d; }; | |
102 | struct derived2 : public b2, derived { char e; }; | |
103 | } | |
104 | ||
105 | # First emit single items. | |
106 | foreach type $typelist { | |
107 | set utype [join [split $type] _] | |
108 | puts $outfile "$type item_$utype;" | |
109 | puts $outfile "unsigned a_$utype\n = alignof ($type);" | |
110 | puts $outfile "typedef $type t_$utype;" | |
111 | puts $outfile "t_$utype item_t_$utype;" | |
112 | } | |
113 | ||
114 | # Now emit all pairs. | |
115 | foreach type $typelist { | |
116 | set utype [join [split $type] _] | |
117 | foreach inner $typelist { | |
118 | set uinner [join [split $inner] _] | |
119 | puts $outfile "align_pair<$type, $inner> item_${utype}_x_${uinner};" | |
120 | puts $outfile "unsigned a_${utype}_x_${uinner}" | |
121 | puts $outfile " = alignof (align_pair<$type, $inner>);" | |
122 | ||
123 | puts $outfile "align_union<$type, $inner> item_${utype}_u_${uinner};" | |
124 | puts $outfile "unsigned a_${utype}_u_${uinner}" | |
125 | puts $outfile " = alignof (align_union<$type, $inner>);" | |
126 | } | |
127 | } | |
128 | ||
129 | # Epilogue. | |
130 | puts $outfile { | |
131 | int main() { | |
132 | return 0; | |
133 | } | |
134 | } | |
135 | ||
136 | close $outfile | |
137 | ||
138 | standard_testfile $filename | |
139 | ||
140 | if {[prepare_for_testing "failed to prepare" $testfile $srcfile \ | |
141 | {debug nowarnings c++ additional_flags=-std=c++11}]} { | |
142 | return -1 | |
143 | } | |
144 | ||
145 | if {![runto_main]} { | |
146 | perror "test suppressed" | |
147 | return | |
148 | } | |
149 | ||
150 | proc maybe_xfail {type} { | |
151 | # See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69560 | |
152 | # The g++ implementation of alignof is changing to match C11. | |
153 | if {[is_x86_like_target] | |
154 | && [test_compiler_info {gcc-[0-8]-*}] | |
155 | && ($type == "double" || $type == "long long" | |
156 | || $type == "unsigned long long")} { | |
157 | setup_xfail *-*-* | |
158 | } | |
159 | } | |
160 | ||
161 | foreach type $typelist { | |
162 | set utype [join [split $type] _] | |
163 | set expected [get_integer_valueof a_$utype 0] | |
164 | ||
165 | maybe_xfail $type | |
166 | gdb_test "print alignof($type)" " = $expected" | |
167 | ||
168 | maybe_xfail $type | |
169 | gdb_test "print alignof(t_$utype)" " = $expected" | |
170 | ||
171 | maybe_xfail $type | |
172 | gdb_test "print alignof(typeof(item_$utype))" " = $expected" | |
173 | ||
174 | foreach inner $typelist { | |
175 | set uinner [join [split $inner] _] | |
176 | set expected [get_integer_valueof a_${utype}_x_${uinner} 0] | |
177 | gdb_test "print alignof(align_pair<${type},${inner}>)" " = $expected" | |
178 | ||
179 | set expected [get_integer_valueof a_${utype}_u_${uinner} 0] | |
180 | gdb_test "print alignof(align_union<${type},${inner}>)" " = $expected" | |
181 | } | |
182 | } | |
183 | ||
184 | set expected [get_integer_valueof a_int3 0] | |
185 | gdb_test "print alignof(int\[3\])" " = $expected" | |
c14b4913 | 186 | |
5335b043 | 187 | set expected [get_integer_valueof a_void 0] |
007e1530 | 188 | gdb_test "print alignof(void)" " = $expected" |