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
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
|
# Copyright 2009-2017 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/>.
# Test multi-exec / multi-process features that work for all configurations,
# even ones that cannot run multiple processes simultaneously.
set testfile "multi-arch-exec"
# The plain remote target can't do multiple inferiors.
if [target_info exists use_gdb_stub] {
return
}
# The 64-bit compile may succeed for i386-linux, but gdb won't be able
# to load the file.
if [istarget "i?86-*linux*"] {
return
}
# The testcase builds two programs, each of its own architecture. For
# example, one built with -m64, another with -m32. The exact compiler
# options depends on target triplet. We generically refer to the
# architectures simply as 'architecture 1' and 'architecture 2'. Each
# program is actually built twice, once for each architecture, because
# we test both execing from arch1 to arch2 and from arch2 to arch1.
# The architecture of the executable that execs is encoded in the
# binaries' names, like so:
#
# $first_arch-multi-arch-exec # execing program
# $first_arch-multi-arch-exec-hello # execed program
# Append the options necessary to build a program for architecture 1
# to the OPTIONS_VAR list.
proc append_arch1_options {options_var} {
upvar 1 $options_var options
if { [istarget "aarch64*-*-*"] } {
return 1
}
lappend options "additional_flags=-m64"
return 1
}
# Append the options necessary to build a program for architecture 2
# to the OPTIONS_VAR list.
proc append_arch2_options {options_var} {
upvar 1 $options_var options
if { [istarget "aarch64*-*-*"] } {
if {[info exists ARM_CC_FOR_TARGET]} {
lappend options "compiler=${ARM_CC_FOR_TARGET}"
return 1
} else {
unsupported "ARM compiler is not known"
return 0
}
}
if [istarget "s390*-*-*"] {
set march "-m31"
} else {
set march "-m32"
}
lappend options "additional_flags=${march}"
return 1
}
# Append the options necessary to build a program for architecture
# ARCH to the OPTIONS_VAR list. Returns true on success.
proc append_arch_options {arch options_var} {
upvar 1 $options_var options
if {$arch == 1} {
return [append_arch1_options options]
} elseif {$arch == 2} {
return [append_arch2_options options]
} else {
error "unhandled architecture: $arch"
}
}
# Build the executables for testing with FIRST_ARCH (either 1 or 2) as
# the architecture before the exec. Returns true on success.
proc build_executables { first_arch } {
# Can't use standard_testfile, we want executables with specialized
# names.
set from_exec "$first_arch-multi-arch-exec"
set from_srcfile multi-arch-exec.c
set from_binfile [standard_output_file ${from_exec}]
set to_exec "$first_arch-multi-arch-exec-hello"
set to_srcfile hello.c
set to_binfile [standard_output_file ${to_exec}]
# Build two executables, one for each arch.
if {$first_arch == 1} {
set from_arch 1
set to_arch 2
} elseif {$first_arch == 2} {
set from_arch 2
set to_arch 1
} else {
error "unhandled first architecture: $first_arch"
}
set from_options [list debug pthreads]
if {![append_arch_options $from_arch from_options]} {
return 0
}
if { [build_executable "failed to prepare" ${from_exec} "${from_srcfile}" \
$from_options] } {
return 0
}
set to_options [list debug]
if {![append_arch_options $to_arch to_options]} {
return 0
}
if { [build_executable "failed to prepare" ${to_exec} "${to_srcfile}" \
$to_options] } {
return 0
}
return 1
}
proc do_test { first_arch mode selected_thread } {
set from_exec "$first_arch-multi-arch-exec"
clean_restart ${from_exec}
if ![runto all_started] then {
fail "couldn't run to all_started"
return -1
}
# Delete the breakpoint at 'all_started' otherwise GDB may
# switch context back to thread 1 to step over the breakpoint.
delete_breakpoints
# A location for this breakpoint should be found in the new
# post-exec image too.
gdb_breakpoint main
gdb_test "thread $selected_thread" "Switching to thread $selected_thread .*"
gdb_test_no_output "set follow-exec-mode $mode"
# Test that GDB updates the target description / arch successfuly
# after the exec.
gdb_test "continue" "Breakpoint 2, main.*" "continue across exec that changes architecture"
}
# Test both arch1=>arch2 and arch2=>arch1.
foreach_with_prefix first_arch {1 2} {
if {![build_executables $first_arch]} {
continue
}
# Test handling the exec event with either the main thread or the
# second thread selected. This tries to ensure that GDB doesn't read
# registers off of the execing thread before figuring out its
# architecture.
foreach_with_prefix selected_thread {1 2} {
foreach_with_prefix follow_exec_mode {"same" "new"} {
do_test $first_arch $follow_exec_mode $selected_thread
}
}
}
|
