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1d506c26 | 1 | # Copyright 2020-2024 Free Software Foundation, Inc. |
ecfda20d SM |
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 to reproduce the crash described in PR 26813. | |
17 | # | |
18 | # When reading a list in any table in the .debug_loclists section, GDB would | |
19 | # read the header at offset 0 in the section (the header of the first table). | |
20 | # When the index of the list we read was greater than the number of lists of | |
21 | # the first table, GDB would erroneously report that the index is invalid. | |
22 | # | |
23 | # So this test creates a .debug_loclists section with two tables. The second | |
24 | # table has more lists than the first one and we try to read a high index in | |
25 | # the second table. | |
26 | ||
27 | load_lib dwarf.exp | |
28 | ||
ce8d533e | 29 | require dwarf2_support |
ecfda20d SM |
30 | |
31 | # Test with 32-bit and 64-bit DWARF. | |
32 | foreach_with_prefix is_64 {false true} { | |
33 | if { $is_64 } { | |
34 | standard_testfile .c -dw64.S | |
35 | set testfile ${testfile}-dw64 | |
36 | } else { | |
37 | standard_testfile .c -dw32.S | |
38 | set testfile ${testfile}-dw32 | |
39 | } | |
40 | ||
41 | # Get the addresses / lengths of func1 and func2. | |
42 | lassign [function_range func1 $srcdir/$subdir/$srcfile] func1_addr func1_len | |
43 | lassign [function_range func2 $srcdir/$subdir/$srcfile] func2_addr func2_len | |
44 | ||
45 | set asm_file [standard_output_file $srcfile2] | |
46 | Dwarf::assemble $asm_file { | |
47 | global func1_addr func1_len | |
48 | global func2_addr func2_len | |
49 | global is_64 | |
50 | ||
51 | # The CU uses the DW_FORM_loclistx form to refer to the .debug_loclists | |
52 | # section. | |
53 | cu { | |
54 | version 5 | |
55 | is_64 $is_64 | |
56 | } { | |
57 | declare_labels int_type | |
58 | ||
59 | DW_TAG_compile_unit { | |
60 | {DW_AT_loclists_base cu_table DW_FORM_sec_offset} | |
61 | } { | |
62 | int_type: DW_TAG_base_type { | |
63 | {DW_AT_byte_size 4 DW_FORM_data1} | |
64 | {DW_AT_encoding @DW_ATE_signed} | |
65 | {DW_AT_name "int"} | |
66 | } | |
67 | ||
68 | DW_TAG_variable { | |
69 | {DW_AT_name "foo"} | |
70 | {DW_AT_location 1 DW_FORM_loclistx} | |
71 | {DW_AT_type :$int_type} | |
72 | } | |
73 | ||
74 | DW_TAG_subprogram { | |
75 | {DW_AT_name "func1"} | |
76 | {DW_AT_low_pc $func1_addr} | |
77 | {DW_AT_high_pc $func1_len DW_FORM_udata} | |
78 | } | |
79 | ||
80 | DW_TAG_subprogram { | |
81 | {DW_AT_name "func2"} | |
82 | {DW_AT_low_pc $func2_addr} | |
83 | {DW_AT_high_pc $func2_len DW_FORM_udata} | |
84 | } | |
85 | } | |
86 | } | |
87 | ||
46a5b75b | 88 | loclists {is-64 $is_64} { |
ecfda20d SM |
89 | # This table is unused, but exists so that the used table is not at |
90 | # the beginning of the section. | |
46a5b75b | 91 | table {} { |
ecfda20d SM |
92 | list_ { |
93 | start_length 0x1000 0x1000 { DW_OP_addr 0x100000 } | |
94 | } | |
95 | } | |
96 | ||
97 | # The lists in this table are accessed by index (DW_FORM_rnglistx). | |
46a5b75b | 98 | table {post-header-label cu_table} { |
ecfda20d SM |
99 | # This list is unused, but exists to offset the next ones. |
100 | list_ { | |
101 | start_length 0x1000 0x1000 { DW_OP_addr 0x100000 } | |
102 | } | |
103 | ||
104 | # For variable foo. | |
105 | list_ { | |
7b9f73fa TT |
106 | # This should not affect the following addresses. |
107 | base_address 0xffff | |
108 | ||
ecfda20d SM |
109 | # When in func1. |
110 | start_length $func1_addr $func1_len { | |
111 | DW_OP_constu 0x123456 | |
112 | DW_OP_stack_value | |
113 | } | |
114 | ||
115 | # When in func2. | |
116 | start_length $func2_addr $func2_len { | |
117 | DW_OP_constu 0x234567 | |
118 | DW_OP_stack_value | |
119 | } | |
120 | } | |
121 | } | |
122 | } | |
123 | } | |
124 | ||
125 | if { [prepare_for_testing "failed to prepare" ${testfile} \ | |
126 | [list $srcfile $asm_file] {nodebug}] } { | |
127 | return -1 | |
128 | } | |
129 | ||
130 | if { ![runto_main] } { | |
ecfda20d SM |
131 | return |
132 | } | |
133 | ||
134 | gdb_breakpoint "func1" | |
135 | gdb_breakpoint "func2" | |
136 | ||
137 | gdb_continue_to_breakpoint "func1" | |
138 | with_test_prefix "at func1" { | |
139 | gdb_test "print /x foo" " = 0x123456" | |
140 | } | |
141 | ||
142 | gdb_continue_to_breakpoint "func2" | |
143 | with_test_prefix "at func2" { | |
144 | gdb_test "print /x foo" " = 0x234567" | |
145 | } | |
146 | } |