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b811d2c2 | 1 | # Copyright 2017-2020 Free Software Foundation, Inc. |
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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 | ||
17 | # This test case verifies that GDB gracefully handles a shared library file | |
18 | # vanishing after being dlopen'ed. This consists of three nested function calls: | |
19 | # | |
20 | # main() -> foo() -> bar() | |
21 | # | |
22 | # where: | |
23 | # - foo exists in solib-vanish-lib1.so, which is dlopen'ed by main() | |
24 | # - bar exists in solib-vanish-lib2.so, which is dynamically linked into | |
25 | # solib-vanish-lib1.so | |
26 | # | |
27 | # Immediately after dlopen'ing solib-vanish-lib1.so, the so file is moved aside | |
28 | # by renaming. The main executable and solib-vanish-lib2.so are still | |
29 | # accessible. | |
30 | # | |
31 | # If a breakpoint is set on bar(), gdb throws an error when this breakpoint is | |
32 | # hit: | |
33 | # | |
34 | # (gdb) r | |
35 | # Starting program: /local/gdb/git/pr_16577_repro/simple/solib-vanish-main | |
36 | # | |
37 | # Breakpoint 1, BFD: reopening ./solib-vanish-lib1.so: No such file or directory | |
38 | # | |
39 | # BFD: reopening ./solib-vanish-lib1.so: No such file or directory | |
40 | # | |
41 | # (gdb) | |
42 | # | |
43 | # Notice that this does not print the current frame, i.e.: | |
44 | # bar (y=1) at solib-vanish-lib2.c:19 | |
45 | # 19 return y + 1; /* break here */ | |
46 | # (gdb) | |
47 | # | |
48 | # The current gdb git tip segfaults if we then try to step: | |
49 | # (gdb) n | |
50 | # Segmentation fault | |
51 | ||
52 | # This test verifies that: | |
53 | # 1) GDB does not segfault when stepping | |
54 | # 2) The stack frame is printed | |
55 | ||
56 | if { [skip_shlib_tests] } { | |
57 | return 0 | |
58 | } | |
59 | ||
60 | # Library 2 | |
61 | set lib2name "solib-vanish-lib2" | |
62 | set srcfile_lib2 ${srcdir}/${subdir}/${lib2name}.c | |
63 | set binfile_lib2 [standard_output_file ${lib2name}.so] | |
64 | set lib2_flags {debug} | |
65 | ||
66 | # Library 1 | |
67 | set lib1name "solib-vanish-lib1" | |
68 | set srcfile_lib1 ${srcdir}/${subdir}/${lib1name}.c | |
69 | set binfile_lib1 [standard_output_file ${lib1name}.so] | |
70 | set lib1_flags [list debug shlib=${binfile_lib2}] | |
71 | ||
72 | # Main program | |
73 | set testfile "solib-vanish-main" | |
74 | set srcfile ${srcdir}/${subdir}/${testfile}.c | |
75 | set executable ${testfile} | |
76 | set binfile [standard_output_file ${executable}] | |
77 | set bin_flags [list debug shlib_load additional_flags=-DVANISH_LIB=\"${binfile_lib1}\"] | |
78 | ||
79 | if { [gdb_compile_shlib ${srcfile_lib2} ${binfile_lib2} $lib2_flags] != "" | |
80 | || [gdb_compile_shlib ${srcfile_lib1} ${binfile_lib1} $lib1_flags] != "" | |
81 | || [gdb_compile ${srcfile} ${binfile} executable $bin_flags] != "" } { | |
82 | untested "failed to compile" | |
83 | return -1 | |
84 | } | |
85 | ||
86 | clean_restart $testfile | |
87 | ||
88 | if { ![runto_main] } { | |
89 | fail "can't run to main" | |
90 | return | |
91 | } | |
92 | ||
93 | delete_breakpoints | |
94 | ||
95 | set lib2_lineno [gdb_get_line_number "break here" ${srcfile_lib2}] | |
96 | ||
97 | gdb_breakpoint "${lib2name}.c:${lib2_lineno}" {allow-pending} | |
98 | ||
99 | # Verify that both the location and source code are displayed | |
100 | gdb_continue_to_breakpoint "bar" \ | |
d4330bde | 101 | ".*${lib2name}.c:${lib2_lineno}.*break here.*" |
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102 | |
103 | # This should not segfault | |
104 | gdb_test "next" \ | |
105 | "" \ | |
106 | "next succeeds" | |
107 |