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b811d2c2 | 1 | # Copyright 2017-2020 Free Software Foundation, Inc. |
e379cee6 PA |
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 | # Test that GDB tolerates being started with libSegFault.so preloaded | |
19 | # with LD_PRELOAD, and that GDB warns about a custom SIGSEGV custom | |
20 | # handler. See PR gdb/18653 | |
21 | # <https://sourceware.org/bugzilla/show_bug.cgi?id=18653#c7>. | |
22 | ||
23 | # We cannot expect remote hosts to see environment variables set on | |
24 | # the local machine. | |
25 | if { [is_remote host] } { | |
26 | unsupported "can't set environment variables on remote host" | |
27 | return -1 | |
28 | } | |
29 | ||
30 | # Spawn GDB with LIB preloaded with LD_PRELOAD. CMDLINE_OPTS are | |
31 | # command line options passed to GDB. | |
32 | ||
33 | proc gdb_spawn_with_ld_preload {lib cmdline_opts} { | |
34 | global env | |
35 | ||
36 | save_vars { env(LD_PRELOAD) } { | |
37 | if { ![info exists env(LD_PRELOAD) ] | |
38 | || $env(LD_PRELOAD) == "" } { | |
39 | set env(LD_PRELOAD) "$lib" | |
40 | } else { | |
41 | append env(LD_PRELOAD) ":$lib" | |
42 | } | |
43 | ||
44 | gdb_spawn_with_cmdline_opts $cmdline_opts | |
45 | } | |
46 | } | |
47 | ||
48 | proc test_libsegfault {} { | |
49 | global gdb_prompt | |
50 | ||
51 | set libsegfault "libSegFault.so" | |
52 | ||
53 | # When started normally, if libSegFault.so is preloaded, GDB | |
54 | # should warn about not being able to propagate the signal | |
55 | # disposition of SIGSEGV. | |
56 | gdb_exit | |
57 | gdb_spawn_with_ld_preload $libsegfault "" | |
58 | ||
59 | set test "gdb emits custom handler warning" | |
60 | gdb_test_multiple "" $test { | |
61 | -re "cannot be preloaded.*\r\n$gdb_prompt $" { | |
62 | # Glibc 2.22 outputs: | |
63 | # ERROR: ld.so: object 'libSegFault.so' from LD_PRELOAD cannot be preloaded (cannot open shared object file): ignored. | |
64 | untested "cannot preload libSegFault.so" | |
65 | return | |
66 | } | |
67 | -re "Found custom handler.*won't be propagated.*\r\n$gdb_prompt $" { | |
68 | pass $test | |
69 | } | |
70 | } | |
71 | ||
72 | # "-q" should disable the warning, though. | |
73 | gdb_exit | |
74 | gdb_spawn_with_ld_preload $libsegfault "-q" | |
75 | ||
76 | set test "quiet suppresses custom handler warning" | |
77 | gdb_test_multiple "" $test { | |
78 | -re "^$gdb_prompt $" { | |
79 | pass $test | |
80 | } | |
81 | } | |
82 | } | |
83 | ||
84 | test_libsegfault |