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61baf725 | 1 | # Copyright 2016-2017 Free Software Foundation, Inc. |
da5b30da AA |
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 accessing "non-variable" variables, i.e., variables which are | |
17 | # optimized to a constant DWARF location expression and/or | |
18 | # partially/fully optimized out. | |
19 | ||
20 | load_lib dwarf.exp | |
21 | ||
22 | if {![dwarf2_support]} { return 0 } | |
23 | ||
24 | standard_testfile main.c nonvar-access-dw.S | |
25 | ||
26 | # Make some DWARF for the test. | |
27 | set asm_file [standard_output_file $srcfile2] | |
28 | ||
29 | Dwarf::assemble $asm_file { | |
30 | cu {} { | |
31 | compile_unit { | |
32 | {DW_AT_name main.c} | |
33 | } { | |
7346ef59 AA |
34 | declare_labels int_type_label char_type_label \ |
35 | struct_s_label struct_t_label array_a9_label \ | |
7942e96e | 36 | char_ptr_label implicit_a_label stack_b_label |
da5b30da AA |
37 | |
38 | int_type_label: base_type { | |
39 | {name "int"} | |
40 | {encoding @DW_ATE_signed} | |
41 | {byte_size 4 DW_FORM_sdata} | |
42 | } | |
7346ef59 AA |
43 | char_type_label: base_type { |
44 | {name "char"} | |
45 | {encoding @DW_ATE_unsigned} | |
46 | {byte_size 1 DW_FORM_sdata} | |
47 | } | |
48 | char_ptr_label: pointer_type { | |
49 | {type :$char_type_label} | |
50 | } | |
da5b30da AA |
51 | |
52 | struct_s_label: structure_type { | |
53 | {name s} | |
54 | {byte_size 4 DW_FORM_sdata} | |
55 | } { | |
56 | member { | |
57 | {name a} | |
58 | {type :$int_type_label} | |
59 | {data_member_location 0 DW_FORM_udata} | |
60 | {bit_size 8 DW_FORM_udata} | |
61 | } | |
62 | member { | |
63 | {name b} | |
64 | {type :$int_type_label} | |
65 | {data_bit_offset 8 DW_FORM_udata} | |
66 | {bit_size 24 DW_FORM_udata} | |
67 | } | |
68 | } | |
69 | ||
22347e55 AA |
70 | struct_t_label: structure_type { |
71 | {name t} | |
72 | {byte_size 4 DW_FORM_sdata} | |
73 | } { | |
74 | member { | |
75 | {name a} | |
76 | {type :$int_type_label} | |
77 | {data_member_location 0 DW_FORM_udata} | |
78 | {bit_size 9 DW_FORM_udata} | |
79 | } | |
80 | member { | |
81 | {name b} | |
82 | {type :$int_type_label} | |
83 | {data_bit_offset 9 DW_FORM_udata} | |
84 | {bit_size 23 DW_FORM_udata} | |
85 | } | |
86 | } | |
87 | ||
7346ef59 AA |
88 | array_a9_label: array_type { |
89 | {type :$char_type_label} | |
90 | } { | |
91 | subrange_type { | |
92 | {type :$int_type_label} | |
93 | {upper_bound 8 DW_FORM_udata} | |
94 | } | |
95 | } | |
96 | ||
da5b30da AA |
97 | DW_TAG_subprogram { |
98 | {name main} | |
99 | {DW_AT_external 1 flag} | |
100 | {low_pc [gdb_target_symbol main] DW_FORM_addr} | |
101 | {high_pc [gdb_target_symbol main]+0x10000 DW_FORM_addr} | |
102 | } { | |
7346ef59 | 103 | # Simple variable without location. |
da5b30da AA |
104 | DW_TAG_variable { |
105 | {name undef_int} | |
106 | {type :$int_type_label} | |
107 | } | |
7346ef59 | 108 | # Struct variable without location. |
da5b30da AA |
109 | DW_TAG_variable { |
110 | {name undef_s} | |
111 | {type :$struct_s_label} | |
112 | } | |
7346ef59 | 113 | # Composite location: byte-aligned pieces. |
da5b30da AA |
114 | DW_TAG_variable { |
115 | {name def_s} | |
116 | {type :$struct_s_label} | |
117 | {location { | |
118 | const1u 0 | |
119 | stack_value | |
120 | bit_piece 8 0 | |
121 | const1s -1 | |
122 | stack_value | |
123 | bit_piece 24 0 | |
124 | } SPECIAL_expr} | |
125 | } | |
7346ef59 | 126 | # Composite location: non-byte-aligned pieces. |
22347e55 AA |
127 | DW_TAG_variable { |
128 | {name def_t} | |
129 | {type :$struct_t_label} | |
130 | {location { | |
e9352324 | 131 | const2s -184 |
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132 | stack_value |
133 | bit_piece 9 0 | |
e9352324 | 134 | const4u 1752286 |
22347e55 AA |
135 | stack_value |
136 | bit_piece 23 0 | |
137 | } SPECIAL_expr} | |
138 | } | |
e9352324 AA |
139 | # Composite location with some empty pieces. |
140 | DW_TAG_variable { | |
141 | {name part_def_a} | |
142 | {type :$array_a9_label} | |
143 | {location { | |
144 | piece 3 | |
145 | const4u 0xf1927314 | |
146 | stack_value | |
147 | piece 4 | |
148 | piece 2 | |
149 | } SPECIAL_expr} | |
150 | } | |
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151 | # Implicit location: immediate value. |
152 | DW_TAG_variable { | |
153 | {name def_implicit_s} | |
154 | {type :$struct_s_label} | |
155 | {location { | |
156 | implicit_value 0x12 0x34 0x56 0x78 | |
157 | } SPECIAL_expr} | |
158 | } | |
159 | # Implicit location: immediate value for whole array, with | |
160 | # excess bytes. | |
161 | implicit_a_label: DW_TAG_variable { | |
162 | {name def_implicit_a} | |
163 | {type :$array_a9_label} | |
164 | {location { | |
165 | implicit_value 0x1 0x12 0x23 0x34 0x45 \ | |
166 | 0x56 0x67 0x78 0x89 0x9a 0xab | |
167 | } SPECIAL_expr} | |
168 | } | |
169 | # Implicit pointer into immediate value. | |
170 | DW_TAG_variable { | |
171 | {name implicit_a_ptr} | |
172 | {type :$char_ptr_label} | |
173 | {location { | |
7942e96e AA |
174 | implicit_pointer $implicit_a_label 5 |
175 | } SPECIAL_expr} | |
176 | } | |
177 | # Stack-value location. | |
178 | stack_b_label: DW_TAG_variable { | |
179 | {name def_stack_b} | |
180 | {type :$struct_t_label} | |
181 | {location { | |
182 | const4u 0x1a2b3c4d | |
183 | stack_value | |
184 | } SPECIAL_expr} | |
185 | } | |
186 | # Implicit pointer into stack value. | |
187 | DW_TAG_variable { | |
188 | {name implicit_b_ptr} | |
189 | {type :$char_ptr_label} | |
190 | {location { | |
191 | implicit_pointer $stack_b_label 1 | |
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192 | } SPECIAL_expr} |
193 | } | |
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194 | } |
195 | } | |
196 | } | |
197 | } | |
198 | ||
5b362f04 | 199 | if { [prepare_for_testing "failed to prepare" ${testfile} \ |
da5b30da AA |
200 | [list $srcfile $asm_file] {nodebug}] } { |
201 | return -1 | |
202 | } | |
203 | ||
204 | if ![runto_main] { | |
205 | return -1 | |
206 | } | |
207 | ||
7346ef59 AA |
208 | # Determine endianness. |
209 | set endian "little" | |
210 | gdb_test_multiple "show endian" "determine endianness" { | |
211 | -re ".* (big|little) endian.*$gdb_prompt $" { | |
212 | set endian $expect_out(1,string) | |
213 | pass "endianness: $endian" | |
214 | } | |
215 | } | |
216 | ||
217 | # Byte-aligned objects with simple location descriptions. | |
218 | switch $endian { big {set val 0x345678} little {set val 0x785634} } | |
219 | gdb_test "print/x def_implicit_s" " = \\{a = 0x12, b = $val\\}" | |
220 | gdb_test "print/x def_implicit_s.b" " = $val" | |
221 | gdb_test "print/x def_implicit_a" \ | |
222 | " = \\{0x1, 0x12, 0x23, 0x34, 0x45, 0x56, 0x67, 0x78, 0x89\\}" | |
223 | gdb_test "print/x def_implicit_a\[5\]" " = 0x56" | |
224 | gdb_test "print/x *(char (*)\[5\]) implicit_a_ptr" \ | |
225 | " = \\{0x56, 0x67, 0x78, 0x89, 0x9a\\}" | |
7942e96e AA |
226 | switch $endian { |
227 | big {set val "a = 52, b = 2833485"} | |
228 | little {set val "a = 77, b = 857502"} | |
229 | } | |
230 | gdb_test "print def_stack_b" " = \\{$val\\}" | |
231 | switch $endian {big {set val 0x2b} little {set val 0x3c}} | |
232 | gdb_test "print/x *implicit_b_ptr" " = $val" | |
7346ef59 AA |
233 | |
234 | # Byte-aligned fields, pieced together from DWARF stack values. | |
da5b30da | 235 | gdb_test "print def_s" " = \\{a = 0, b = -1\\}" |
e9352324 AA |
236 | switch $endian { big {set val 0x92} little {set val 0x73} } |
237 | gdb_test "print/x part_def_a\[4\]" " = $val" | |
238 | gdb_test "print/x part_def_a\[8\]" " = <optimized out>" | |
7346ef59 AA |
239 | |
240 | # Non-byte-aligned fields, pieced together from DWARF stack values. | |
e9352324 | 241 | gdb_test "print def_t" " = \\{a = -184, b = 1752286\\}" |
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242 | |
243 | # Simple variable without location. | |
da5b30da | 244 | gdb_test "print undef_int" " = <optimized out>" |
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245 | |
246 | # Member of a structure without location. | |
da5b30da | 247 | gdb_test "print undef_s.a" " = <optimized out>" |