1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
|
# Copyright 2012 Free Software Foundation, Inc.
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>. */
if {[skip_shlib_tests]} {
return -1
}
set executable ctxobj-m
# The sources used to build two shared libraries (SO). We use the exact
# same sources to build both SOs, but differentiate them through the use
# of macros defined when calling the compiler.
#
# We need two source files per SO, because we need to test the situation
# where we are trying to print the value of a global variable defined
# in that SO while the variable's associated symtab has not been created
# yet.
set libsrc [list "${srcdir}/${subdir}/ctxobj-v.c" \
"${srcdir}/${subdir}/ctxobj-f.c"]
set libobj1 "${objdir}/${subdir}/libctxobj1.so"
set libobj2 "${objdir}/${subdir}/libctxobj2.so"
set libobj1_opts { debug additional_flags=-fPIC
additional_flags=-DVERSION=104
additional_flags=-DGET_VERSION=get_version_1 }
set libobj2_opts { debug additional_flags=-fPIC
additional_flags=-DVERSION=203
additional_flags=-DGET_VERSION=get_version_2 }
if { [gdb_compile_shlib $libsrc $libobj1 $libobj1_opts ] != "" } {
return -1
}
if { [gdb_compile_shlib $libsrc $libobj2 $libobj2_opts ] != "" } {
return -1
}
if { [gdb_compile "${srcdir}/${subdir}/${executable}.c" \
"${objdir}/${subdir}/${executable}" \
executable \
[list debug shlib=${libobj1} shlib=${libobj2}]]
!= ""} {
return -1
}
clean_restart $executable
gdb_load_shlibs $libobj1 $libobj2
if ![runto_main] {
untested "could not run to main"
return -1
}
set bp_location [gdb_get_line_number "STOP" "ctxobj-f.c"]
gdb_test "break ctxobj-f.c:$bp_location" \
"Breakpoint \[0-9\]+ at 0x\[0-9a-fA-F\]+: .*" \
"break in get_version functions"
gdb_test "continue" \
"Breakpoint $decimal, get_version_1 \\(\\).*" \
"continue to get_version_1"
# Try printing "this_version_num". There are two global variables
# with that name, and some systems such as GNU/Linux merge them
# into one single entity, while some other systems such as Windows
# keep them separate. In the first situation, we have to verify
# that GDB does not randomly select the wrong instance. And in
# the second case, we have to verify that GDB prints the value
# of the instance from the current debugging context (the shared
# library currently being debugged).
#
# We perform two tests: The first print test verifies that we are
# doing things right when the partial symtab hasn't been expanded.
# And the second print test will do the same, but after the partial
# symtab has been expanded.
#
# To avoid adding target-specific code in this testcase, the program
# sets a local variable named 'v' with the value of the global
# variable 'this_version_number'. This allows us to compare the value
# that GDB thinks 'this_version_num' has, against the actual value
# seen by the program itself.
gdb_test "print this_version_num == v" \
" = 1" \
"print libctxobj1's this_version_num from partial symtab"
gdb_test "print this_version_num == v" \
" = 1" \
"print libctxobj1's this_version_num from symtab"
# Do the same, but from get_version_2.
gdb_test "continue" \
"Breakpoint $decimal, get_version_2 \\(\\).*" \
"continue to get_version_2"
gdb_test "print this_version_num == v" \
" = 1" \
"print libctxobj2's this_version_num from partial symtab"
gdb_test "print this_version_num == v" \
" = 1" \
"print libctxobj2's this_version_num from symtab"
|
