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42a4f53d | 1 | # Copyright 2018-2019 Free Software Foundation, Inc. |
6f0ffe50 AB |
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 | # Test that GDB can support accesing fields of a structure if the | |
17 | # fields have non-standard names. Specifically, if the names are | |
18 | # reserved C type names like 'double', 'float', 'int', etc. | |
19 | # | |
20 | # We don't expect to that such structures should be seen in real C | |
21 | # code, but in some cases GDB will generate artificial structures, and | |
22 | # in some cases, these type names are the obvious choice for field | |
23 | # names. | |
24 | # | |
25 | # One specific example is RISC-V, the 64-bit floating point registers | |
26 | # are represented as a structure with the field names 'float' and | |
27 | # 'double'. | |
28 | ||
29 | load_lib dwarf.exp | |
30 | ||
31 | # This test can only be run on targets which support DWARF-2 and use | |
32 | # gas. | |
33 | if {![dwarf2_support]} { | |
34 | return 0 | |
35 | } | |
36 | ||
37 | standard_testfile dw2-unusual-field-names.c dw2-unusual-field-names.S | |
38 | set asm_file [standard_output_file $srcfile2] | |
39 | ||
40 | # We need to know the size of integer and address types in order to | |
41 | # write some of the debugging info we'd like to generate. | |
42 | # | |
43 | # For that, we ask GDB by debugging our test program. Any program | |
44 | # would do, but since we already have one specifically for this | |
45 | # testcase, might as well use that. | |
46 | if [prepare_for_testing "failed to prepare" ${testfile} ${srcfile}] { | |
47 | return -1 | |
48 | } | |
49 | set int_size [get_sizeof "int" -1] | |
50 | ||
51 | # Rebuild the test binary with the single field within the structure | |
52 | # renamed to FIELD_NAME, then test that we can access the field | |
53 | # through '.' and through '->'. | |
54 | proc run_test { field_name } { | |
55 | global asm_file testfile srcfile subdir srcdir | |
56 | global int_size | |
57 | ||
58 | Dwarf::assemble $asm_file { | |
59 | global srcdir subdir srcfile | |
60 | global field_name int_size | |
61 | ||
62 | cu {} { | |
63 | DW_TAG_compile_unit { | |
64 | {DW_AT_language @DW_LANG_C} | |
65 | {DW_AT_name dw2-unusual-field-names.c} | |
66 | {DW_AT_comp_dir /tmp} | |
67 | } { | |
68 | declare_labels itype ptype stype | |
69 | ||
70 | itype: DW_TAG_base_type { | |
71 | {DW_AT_byte_size $int_size DW_FORM_sdata} | |
72 | {DW_AT_encoding @DW_ATE_signed} | |
73 | {DW_AT_name int} | |
74 | } | |
75 | ||
76 | stype: DW_TAG_structure_type { | |
77 | {DW_AT_name "foo"} | |
78 | {DW_AT_byte_size $int_size DW_FORM_sdata} | |
79 | } { | |
80 | member { | |
81 | {name $field_name} | |
82 | {type :$itype} | |
83 | {data_member_location 0 data1} | |
84 | } | |
85 | } | |
86 | ||
87 | ptype: DW_TAG_pointer_type { | |
88 | {DW_AT_type :$stype} | |
89 | } | |
90 | ||
91 | DW_TAG_variable { | |
92 | {DW_AT_name obj} | |
93 | {DW_AT_type :$stype} | |
94 | {DW_AT_location { | |
95 | DW_OP_addr [gdb_target_symbol obj] | |
96 | } SPECIAL_expr} | |
97 | {external 1 flag} | |
98 | } | |
99 | ||
100 | DW_TAG_variable { | |
101 | {DW_AT_name ptr} | |
102 | {DW_AT_type :$ptype} | |
103 | {DW_AT_location { | |
104 | DW_OP_addr [gdb_target_symbol ptr] | |
105 | } SPECIAL_expr} | |
106 | {external 1 flag} | |
107 | } | |
108 | } | |
109 | } | |
110 | } | |
111 | ||
112 | if { [prepare_for_testing "failed to prepare" ${testfile} \ | |
113 | [list $srcfile $asm_file] {nodebug}] } { | |
114 | return -1 | |
115 | } | |
116 | ||
117 | if ![runto_main] { | |
118 | return -1 | |
119 | } | |
120 | ||
121 | gdb_test "p obj.$field_name" " = 0" \ | |
122 | "access a field named '$field_name' directly" | |
123 | ||
124 | gdb_test "p ptr->$field_name" " = 0" \ | |
125 | "access a field named '$field_name' through a pointer" | |
126 | ||
127 | gdb_exit | |
128 | } | |
129 | ||
130 | foreach field_name { double float char byte long int short unsigned signed } { | |
131 | run_test $field_name | |
132 | } |