1 # Copyright 1998-2023 Free Software Foundation, Inc.
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.
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.
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/>.
16 # This file is part of the gdb testsuite
18 # Print out various class objects' members and check that the error
19 # about the field or baseclass being ambiguous is emitted at the right
22 if { [skip_cplus_tests] } { return }
26 set additional_flags ""
27 if {[test_compiler_info {gcc-[0-9]-*}]} {
28 # GCCs prior to 10.1 do not support -Wno-inaccessible-base.
29 set additional_flags "additional_flags=-w"
30 } elseif {[test_compiler_info gcc*] || [test_compiler_info clang*]} {
31 set additional_flags "additional_flags=-Wno-inaccessible-base"
34 if {[prepare_for_testing "failed to prepare" $testfile $srcfile \
35 [list debug c++ $additional_flags]]} {
43 # Run to a breakpoint after the variables have been initialized so we
44 # can play with the variable values.
46 set lineno [gdb_get_line_number "set breakpoint here"]
48 gdb_breakpoint $lineno
49 gdb_continue_to_breakpoint "breakpoint here"
53 with_test_prefix "all vars" {
64 " = \{<A1> = \{x = 1, y = 2\}, <A2> = \{x = 3, y = 4\}, z = 5\}"
67 " = \{<A1> = \{x = 1, y = 2\}, z = 3\}"
70 " = \{<A2> = \{x = 1, y = 2\}, w = 3\}"
73 " = \{<L> = \{<A1> = \{x = 1, y = 2\}, z = 7\}, <M> = \{<A2> = \{x = 3, y = 4\}, w = 5\}, r = 6\}"
76 " = \{<A1> = \{x = 1, y = 2\}, i = 3\}"
79 " = {<K> = {<A1> = {x = 1, y = 2}, i = 5}, <L> = {<A1> = {x = 3, y = 4}, z = 6}, j = 7}"
82 " = \{<KV> = \{<A1> = \{x = 1, y = 2\}, _vptr.KV = $hex <vtable for JV.*>, i = 3\}, <LV> = \{_vptr.LV = $hex <VTT for JV>, z = 4\}, jv = 5\}"
84 # No way to initialize one of the A1's, so just take any number there.
85 gdb_test "print jva1" \
86 " = \{<KV> = \{<A1> = \{x = 3, y = 4\}, _vptr.KV = $hex <vtable for JVA1.*>, i = 6\}, <LV> = \{_vptr.LV = $hex <VTT for JVA1>, z = 5\}, <A1> = \{x = $number, y = $number\}, jva1 = 7\}"
88 gdb_test "print jva2" \
89 " = \{<KV> = \{<A1> = \{x = 3, y = 4\}, _vptr.KV = $hex <vtable for JVA2.*>, i = 8\}, <LV> = \{_vptr.LV = $hex <VTT for JVA2>, z = 7\}, <A2> = \{x = 5, y = 6\}, jva2 = 9\}"
91 gdb_test "print jva1v" \
92 " = \{<KV> = \{<A1> = \{x = 1, y = 2\}, _vptr.KV = $hex <vtable for JVA1V+.*>, i = 4\}, <LV> = \{_vptr.LV = $hex <VTT for JVA1V>, z = 3\}, jva1v = 5\}"
95 # Check that we can access all the fields correctly, using the same
96 # syntax as used in the .cc file. Keep the order here in sync with
98 with_test_prefix "all fields" {
99 gdb_test "print a1.x" " = 1"
100 gdb_test "print a1.y" " = 2"
102 gdb_test "print a2.x" " = 1"
103 gdb_test "print a2.y" " = 2"
105 gdb_test "print a3.x" " = 1"
106 gdb_test "print a3.y" " = 2"
108 gdb_test "print x.A1::x" " = 1"
109 gdb_test "print x.A1::y" " = 2"
110 gdb_test "print x.A2::x" " = 3"
111 gdb_test "print x.A2::y" " = 4"
112 gdb_test "print x.z" " = 5"
114 gdb_test "print l.x" " = 1"
115 gdb_test "print l.y" " = 2"
116 gdb_test "print l.z" " = 3"
118 gdb_test "print m.x" " = 1"
119 gdb_test "print m.y" " = 2"
120 gdb_test "print m.w" " = 3"
122 gdb_test "print n.A1::x" " = 1"
123 gdb_test "print n.A1::y" " = 2"
124 gdb_test "print n.A2::x" " = 3"
125 gdb_test "print n.A2::y" " = 4"
126 gdb_test "print n.w" " = 5"
127 gdb_test "print n.r" " = 6"
128 gdb_test "print n.z" " = 7"
130 gdb_test "print k.x" " = 1"
131 gdb_test "print k.y" " = 2"
132 gdb_test "print k.i" " = 3"
134 gdb_test "print j.K::x" " = 1"
135 gdb_test "print j.K::y" " = 2"
136 gdb_test "print j.L::x" " = 3"
137 gdb_test "print j.L::y" " = 4"
138 gdb_test "print j.i" " = 5"
139 gdb_test "print j.z" " = 6"
140 gdb_test "print j.j" " = 7"
142 gdb_test "print jv.x" " = 1"
143 gdb_test "print jv.y" " = 2"
144 gdb_test "print jv.i" " = 3"
145 gdb_test "print jv.z" " = 4"
146 gdb_test "print jv.jv" " = 5"
148 setup_kfail "c++/26550" *-*-*
149 gdb_test "print jva1.KV::x" " = 1"
150 setup_kfail "c++/26550" *-*-*
151 gdb_test "print jva1.KV::y" " = 2"
152 setup_kfail "c++/26550" *-*-*
153 gdb_test "print jva1.LV::x" " = 3"
154 setup_kfail "c++/26550" *-*-*
155 gdb_test "print jva1.LV::y" " = 4"
156 gdb_test "print jva1.z" " = 5"
157 gdb_test "print jva1.i" " = 6"
158 gdb_test "print jva1.jva1" "= 7"
160 setup_kfail "c++/26550" *-*-*
161 gdb_test "print jva2.KV::x" " = 1"
162 setup_kfail "c++/26550" *-*-*
163 gdb_test "print jva2.KV::y" " = 2"
164 setup_kfail "c++/26550" *-*-*
165 gdb_test "print jva2.LV::x" " = 3"
166 setup_kfail "c++/26550" *-*-*
167 gdb_test "print jva2.LV::y" " = 4"
168 gdb_test "print jva2.A2::x" " = 5"
169 gdb_test "print jva2.A2::y" " = 6"
170 gdb_test "print jva2.z" " = 7"
171 gdb_test "print jva2.i" " = 8"
172 gdb_test "print jva2.jva2" "= 9"
174 gdb_test "print jva1v.x" " = 1"
175 gdb_test "print jva1v.y" " = 2"
176 gdb_test "print jva1v.z" " = 3"
177 gdb_test "print jva1v.i" " = 4"
178 gdb_test "print jva1v.jva1v" " = 5"
181 # Test that printing WHAT reports an error about FIELD being ambiguous
182 # in TYPE, and that the candidates are CANDIDATES.
183 proc test_ambiguous {what field type candidates} {
184 set msg "Request for member '$field' is ambiguous in type '$type'. Candidates are:"
186 foreach c $candidates {
187 set c_re [string_to_regexp $c]
188 append msg "\r\n $c_re"
191 gdb_test "print $what" $msg
194 # X is derived from A1 and A2; both A1 and A2 have a member 'x'
195 test_ambiguous "x.x" "x" "X" {
196 "'int A1::x' (X -> A1)"
197 "'int A2::x' (X -> A2)"
200 # N is derived from A1 and A2, but not immediately -- two steps
201 # up in the hierarchy. Both A1 and A2 have a member 'x'.
202 test_ambiguous "n.x" "x" "N" {
203 "'int A1::x' (N -> L -> A1)"
204 "'int A2::x' (N -> M -> A2)"
207 # J is derived from A1 twice. A1 has a member x.
208 test_ambiguous "j.x" "x" "J" {
209 "'int A1::x' (J -> K -> A1)"
210 "'int A1::x' (J -> L -> A1)"
213 # JV is derived from A1 but A1 is a virtual base. Should not
214 # report an ambiguity in this case.
215 gdb_test "print jv.x" " = 1"
217 # JVA1 is derived from A1; A1 occurs as a virtual base in two
218 # ancestors, and as a non-virtual immediate base. Ambiguity must
220 test_ambiguous "jva1.x" "x" "JVA1" {
221 "'int A1::x' (JVA1 -> KV -> A1)"
222 "'int A1::x' (JVA1 -> A1)"
225 # JVA2 is derived from A1 & A2; A1 occurs as a virtual base in two
226 # ancestors, and A2 is a non-virtual immediate base. Ambiguity must
227 # be reported as A1 and A2 both have a member 'x'.
228 test_ambiguous "jva2.x" "x" "JVA2" {
229 "'int A1::x' (JVA2 -> KV -> A1)"
230 "'int A2::x' (JVA2 -> A2)"
233 # JVA1V is derived from A1; A1 occurs as a virtual base in two
234 # ancestors, and also as a virtual immediate base. Ambiguity must
236 gdb_test "print jva1v.x" " = 1"
238 # Now check for ambiguous bases.
240 # J is derived from A1 twice; report ambiguity if a J is
242 gdb_test "print (A1)j" "base class 'A1' is ambiguous in type 'J'"
244 # JV is derived from A1 twice, but A1 is a virtual base; should
245 # not report ambiguity when a JV is cast to an A1.
246 gdb_test "print (A1)jv" " = {x = 1, y = 2}"
248 # JVA1 is derived from A1; A1 is a virtual base and also a
249 # non-virtual base. Must report ambiguity if a JVA1 is cast to an A1.
250 gdb_test "print (A1)jva1" "base class 'A1' is ambiguous in type 'JVA1'"
252 # Add an intermediate cast to KV, and it should work.
253 setup_kfail "c++/26550" *-*-*
254 gdb_test "print (KV)jva1" " = \{<A1> = \{x = 3, y = 4\}, _vptr.KV = $hex <VTT for KV>, i = 6\}"
255 setup_kfail "c++/26550" *-*-*
256 gdb_test "print (A1)(KV)jva1" " = \{x = 3, y = 4\}"
258 # JVA1V is derived from A1; A1 is a virtual base indirectly
259 # and also directly; must not report ambiguity when a JVA1V is cast to an A1.
260 gdb_test "print (A1)jva1v" " = {x = 1, y = 2}"
262 # C++20 introduced a way to have ambiguous fields with the same byte offset.
263 # This class explicitly tests for that.
264 # if this is tested with a compiler that can't handle [[no_unique_address]]
265 # the code should still correctly identify the ambiguity because of
266 # different byte offsets.
267 test_ambiguous "je.x" "x" "JE" {
268 "'int A1::x' (JE -> A1)"
269 "'empty A4::x' (JE -> A4)"