1# This testcase is part of GDB, the GNU debugger.
2
3# Copyright 2002-2015 Free Software Foundation, Inc.
4
5# This program is free software; you can redistribute it and/or modify
6# it under the terms of the GNU General Public License as published by
7# the Free Software Foundation; either version 3 of the License, or
8# (at your option) any later version.
9#
10# This program is distributed in the hope that it will be useful,
11# but WITHOUT ANY WARRANTY; without even the implied warranty of
12# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13# GNU General Public License for more details.
14#
15# You should have received a copy of the GNU General Public License
16# along with this program.  If not, see <http://www.gnu.org/licenses/>.
17
18standard_testfile
19set executable $testfile
20
21if { [prepare_for_testing $testfile.exp $executable $srcfile] } {
22    return -1
23}
24
25if [get_compiler_info] {
26    return -1
27}
28
29#
30# set it up at a breakpoint so we can play with the variable values
31#
32
33if ![runto_main] then {
34    perror "couldn't run to breakpoint"
35    continue
36}
37
38#
39
40proc check_set { t l r new add } {
41    global gdb_prompt
42
43    set prefix "var ${t} l"
44    gdb_test "tbreak wack_${t}"
45
46    set test "continue to wack_${t}"
47    gdb_test_multiple "continue" $test {
48	-re "register ${t} l = u, r = v;\r\n$gdb_prompt $" {
49	    # See GCC PR debug/53948.
50	    send_gdb "next\n"
51	    exp_continue
52	}
53	-re "l = add_${t} .l, r.;\r\n$gdb_prompt $" {
54	    pass $test
55	}
56    }
57
58    gdb_test "print l" " = ${l}" \
59	"${prefix}; print old l, expecting ${l}"
60    gdb_test "print r" " = ${r}" \
61	"${prefix}; print old r, expecting ${r}"
62    gdb_test_no_output "set variable l = 4" \
63	"${prefix}; setting l to 4"
64    gdb_test "print l" " = ${new}" \
65	"${prefix}; print new l, expecting ${new}"
66    gdb_test "next" "return l \\+ r;" \
67	"${prefix}; next over add call"
68    gdb_test "print l" " = ${add}" \
69	"${prefix}; print incremented l, expecting ${add}"
70}
71
72check_set "charest" "-1 .*" "-2 .*" "4 ..004." "2 ..002."
73check_set "short" "-1" "-2" "4" "2"
74check_set "int" "-1" "-2" "4" "2"
75check_set "long" "-1" "-2" "4" "2"
76check_set "longest" "-1" "-2" "4" "2"
77check_set "float" "-1" "-2" "4" "2"
78check_set "double" "-1" "-2" "4" "2"
79check_set "doublest" "-1" "-2" "4" "2"
80
81#
82
83proc up_set { t l r new } {
84    set prefix "upvar ${t} l"
85    gdb_test "tbreak add_${t}"
86    gdb_test "continue" "return u . v;" \
87	"continue to add_${t}"
88    gdb_test "up" "l = add_${t} .l, r.;" \
89	"${prefix}; up"
90    gdb_test "print l" " = ${l}" \
91	"${prefix}; print old l, expecting ${l}"
92    gdb_test "print r" " = ${r}" \
93	"${prefix}; print old r, expecting ${r}"
94    gdb_test_no_output "set variable l = 4" \
95	"${prefix}; set l to 4"
96    gdb_test "print l" " = ${new}" \
97	"${prefix}; print new l, expecting ${new}"
98}
99
100up_set "charest" "-1 .*" "-2 .*" "4 ..004."
101up_set "short" "-1" "-2" "4"
102up_set "int" "-1" "-2" "4"
103up_set "long" "-1" "-2" "4"
104up_set "longest" "-1" "-2" "4"
105up_set "float" "-1" "-2" "4"
106up_set "double" "-1" "-2" "4"
107up_set "doublest" "-1" "-2" "4"
108
109#
110
111proc check_struct { t old new } {
112    set prefix "var struct ${t} u"
113    gdb_test "tbreak wack_struct_${t}"
114    gdb_test "continue" "int i; register struct s_${t} u = z_${t};" \
115	"continue to wack_struct_${t}"
116    gdb_test "next 2" "add_struct_${t} .u.;" \
117	"${prefix}; next to add_struct_${t} call"
118    gdb_test "print u" " = ${old}" \
119	"${prefix}; print old u, expecting ${old}"
120    gdb_test_no_output "set variable u = s_${t}" \
121	"${prefix}; set u to s_${t}"
122    gdb_test "print u" " = ${new}" \
123	"${prefix}; print new u, expecting ${new}"
124}
125
126check_struct "1" "{s = \\{0}}" "{s = \\{1}}"
127check_struct "2" "{s = \\{0, 0}}" "{s = \\{1, 2}}"
128check_struct "3" "{s = \\{0, 0, 0}}" "{s = \\{1, 2, 3}}"
129check_struct "4" "{s = \\{0, 0, 0, 0}}" "{s = \\{1, 2, 3, 4}}"
130
131proc up_struct { t old new } {
132    set prefix "up struct ${t} u"
133    gdb_test "tbreak add_struct_${t}"
134    gdb_test "continue" "for .i = 0; i < sizeof .s. / sizeof .s.s.0..; i..." \
135	"continue to add_struct_${t}"
136    gdb_test "up" "u = add_struct_${t} .u.;" \
137	"${prefix}; up"
138    gdb_test "print u" " = ${old}" \
139	"${prefix}; print old u, expecting ${old}"
140    gdb_test_no_output "set variable u = s_${t}" \
141	"${prefix}; set u to s_${t}"
142    gdb_test "print u" " = ${new}" \
143	"${prefix}; print new u, expecting ${new}"
144}
145
146up_struct "1" "{s = \\{0}}" "{s = \\{1}}"
147up_struct "2" "{s = \\{0, 0}}" "{s = \\{1, 2}}"
148up_struct "3" "{s = \\{0, 0, 0}}" "{s = \\{1, 2, 3}}"
149up_struct "4" "{s = \\{0, 0, 0, 0}}" "{s = \\{1, 2, 3, 4}}"
150
151#
152
153proc check_field { t } {
154    global gdb_prompt
155    gdb_test "tbreak wack_field_${t}"
156    gdb_test "continue" "register struct f_${t} u = f_${t};" \
157	    "continue field ${t}"
158
159    # Match either the return statement, or the line immediatly after
160    # it.  The compiler can end up merging the return statement into
161    # the return instruction.
162    gdb_test "next" "(return u;|\})" "next field ${t}"
163
164    gdb_test "print u" " = {i = 1, j = 1, k = 1}" "old field ${t}"
165    gdb_test_no_output "set variable u = F_${t}"
166    gdb_test "print u" " = {i = 0, j = 0, k = 0}" "new field ${t}"
167
168    gdb_test_no_output "set variable u = F_${t}, u.i = f_${t}.i"
169    gdb_test "print u" " = {i = 1, j = 0, k = 0}" "f_${t}.i"
170
171    gdb_test_no_output "set variable u = F_${t}, u.j = f_${t}.j"
172    gdb_test "print u" " = {i = 0, j = 1, k = 0}" "f_${t}.j"
173
174    gdb_test_no_output "set variable u = F_${t}, u.k = f_${t}.k"
175    gdb_test "print u" " = {i = 0, j = 0, k = 1}" "f_${t}.k"
176
177    gdb_test_no_output "set variable u = f_${t}, u.i = F_${t}.i"
178    gdb_test "print u" " = {i = 0, j = 1, k = 1}" "F_${t}.i"
179
180    gdb_test_no_output "set variable u = f_${t}, u.j = F_${t}.j"
181    gdb_test "print u" " = {i = 1, j = 0, k = 1}" "F_${t}.j"
182
183    gdb_test_no_output "set variable u = f_${t}, u.k = F_${t}.k"
184    gdb_test "print u" " = {i = 1, j = 1, k = 0}" "F_${t}.k"
185
186}
187
188check_field 1
189check_field 2
190check_field 3
191check_field 4
192
193#
194
195# WANTED: A fairly portable way of convincing the compiler to split a
196# value across memory and registers.
197
198