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1 | # Copyright 2002, 2003, 2004, 2007, 2008, 2009, 2010 |
2 | # Free Software Foundation, Inc. | |
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3 | |
4 | # This program is free software; you can redistribute it and/or modify | |
5 | # it under the terms of the GNU General Public License as published by | |
e22f8b7c | 6 | # the Free Software Foundation; either version 3 of the License, or |
10abb1d4 | 7 | # (at your option) any later version. |
e22f8b7c | 8 | # |
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9 | # This program is distributed in the hope that it will be useful, |
10 | # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | # GNU General Public License for more details. | |
e22f8b7c | 13 | # |
10abb1d4 | 14 | # You should have received a copy of the GNU General Public License |
e22f8b7c | 15 | # along with this program. If not, see <http://www.gnu.org/licenses/>. |
10abb1d4 | 16 | |
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17 | # This file is part of the gdb testsuite |
18 | ||
19 | # Test casting, especially between class types or pointer-to-class | |
20 | # types. | |
21 | ||
22 | # This file is part of the gdb testsuite | |
23 | ||
24 | if $tracelevel then { | |
25 | strace $tracelevel | |
26 | } | |
27 | ||
28 | # | |
29 | # test running programs | |
30 | # | |
31 | ||
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32 | |
33 | if { [skip_cplus_tests] } { continue } | |
34 | ||
35 | set testfile "casts" | |
36 | set srcfile ${testfile}.cc | |
37 | set binfile ${objdir}/${subdir}/${testfile} | |
38 | ||
39 | if [get_compiler_info ${binfile} "c++"] { | |
40 | return -1; | |
41 | } | |
42 | ||
43 | if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug c++}] != "" } { | |
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44 | untested casts.exp |
45 | return -1 | |
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46 | } |
47 | ||
48 | ||
49 | gdb_exit | |
50 | gdb_start | |
51 | gdb_reinitialize_dir $srcdir/$subdir | |
52 | gdb_load ${binfile} | |
53 | ||
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54 | if ![runto_main] then { |
55 | perror "couldn't run to breakpoint" | |
56 | continue | |
57 | } | |
58 | ||
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59 | gdb_test "break [gdb_get_line_number "casts.exp: 1"]" \ |
60 | "Breakpoint.*at.* file .*" \ | |
61 | "" | |
62 | ||
6eac95e3 | 63 | gdb_test "continue" "Breakpoint .* at .*casts.cc.*" "" |
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64 | |
65 | # Casting a pointer to a base class to a pointer to a derived class | |
66 | # should yield the entire derived class. Until August 2002, GDB got | |
67 | # the enclosing type on `(B *) a' wrong: while the value's static type | |
68 | # was `B *', as it should be, the enclosing type (which is supposed to | |
69 | # be the dynamic type) was `A *'. It's senseless to have a static | |
70 | # type derived from the dynamic type; it should be the other way | |
71 | # 'round. Dereferencing this oddly typed pointer yielded a value in | |
72 | # which only the base class's members were initialized, since GDB uses | |
73 | # the enclosing type to decide how many bytes to read. Members from | |
74 | # the derived class were garbage, from GDB's address space. | |
75 | gdb_test "print * (B *) a" ".* = {<A> = {a = 42}, b = 1729}" \ | |
76 | "cast base class pointer to derived class pointer" | |
77 | ||
78 | # Check also that we get the same results from letting the compiler do | |
79 | # the dereference. | |
80 | gdb_test "print * b" ".* = {<A> = {a = 42}, b = 1729}" \ | |
81 | "let compiler cast base class pointer to derived class pointer" | |
f0050c20 AR |
82 | |
83 | # Check upcasting (it is trivial but still). | |
84 | gdb_test "print * (A *) b" ".* = {a = 42}" \ | |
85 | "cast derived class pointer to base class pointer" | |
86 | ||
87 | # Casting References. | |
88 | # Check upcasting. | |
89 | gdb_test "print (A &) br" ".* = .A &.* {a = 42}" \ | |
90 | "cast derived class reference to base class reference" | |
91 | ||
92 | # Check downcasting. | |
93 | gdb_test "print (B &) ar" ".* = .B.* {<A> = {a = 42}, b = 1729}" \ | |
94 | "cast base class reference to derived class reference" | |
95 | ||
96 | # Check compiler casting | |
97 | gdb_test "print br" ".* = .B.* {<A> = {a = 42}, b = 1729}" \ | |
98 | "let compiler cast base class reference to derived class reference" | |
4e8f195d TT |
99 | |
100 | ||
101 | # A few basic tests of "new" casts. | |
102 | ||
103 | gdb_test "print const_cast<const B *> (b)" " = \\(const B \\*\\) $hex" \ | |
104 | "basic test of const_cast" | |
105 | ||
106 | gdb_test "print const_cast<void *> (0)" " = \\(void \\*\\) 0x0" \ | |
107 | "const_cast of 0" | |
108 | ||
109 | gdb_test "print static_cast<A *> (b)" " = \\(A \\*\\) $hex" \ | |
110 | "basic test of static_cast" | |
111 | ||
112 | gdb_test "print static_cast<A &> (*b)" " = \\(A \\&\\) @$hex: {a = 42}" \ | |
113 | "static_cast to reference type" | |
114 | ||
115 | gdb_test "print reinterpret_cast<A *> (b)" " = \\(A \\*\\) $hex" \ | |
116 | "basic test of reinterpret_cast" | |
117 | ||
118 | gdb_test "print reinterpret_cast<void> (b)" "Invalid reinterpret_cast" \ | |
119 | "test invalid reinterpret_cast" | |
120 | ||
121 | gdb_test "print reinterpret_cast<A &> (*b)" " = \\(A \\&\\) @$hex: {a = 42}" \ | |
122 | "reinterpret_cast to reference type" | |
123 | ||
124 | # Tests of dynamic_cast. | |
125 | ||
126 | set nonzero_hex "0x\[0-9A-Fa-f\]\[0-9A-Fa-f\]+" | |
127 | ||
128 | gdb_test "print dynamic_cast<void> (a)" \ | |
129 | ".*must be a pointer or reference type" \ | |
130 | "invalid dynamic_cast" | |
131 | ||
132 | gdb_test "print dynamic_cast<void *> (0)" \ | |
133 | " = \\(void \\*\\) 0x0" \ | |
134 | "dynamic_cast of 0 to void*" | |
135 | ||
136 | gdb_test "print dynamic_cast<Alpha *> (&derived)" \ | |
137 | " = \\(Alpha \\*\\) $nonzero_hex" \ | |
138 | "dynamic_cast simple upcast" | |
139 | ||
140 | gdb_test "print dynamic_cast<Alpha *> (&doublyderived)" \ | |
141 | " = \\(Alpha \\*\\) $nonzero_hex" \ | |
142 | "dynamic_cast upcast to unique base" | |
143 | ||
144 | gdb_test "print dynamic_cast<Alpha &> (derived)" \ | |
145 | " = \\(Alpha \\&\\) @$nonzero_hex: {.* = $nonzero_hex}" \ | |
146 | "dynamic_cast simple upcast to reference" | |
147 | ||
148 | gdb_test "print dynamic_cast<Derived *> (ad)" \ | |
149 | " = \\(Derived \\*\\) $nonzero_hex" \ | |
150 | "dynamic_cast simple downcast" | |
151 | ||
152 | gdb_test "print dynamic_cast<VirtuallyDerived *> (add)" \ | |
153 | " = \\(VirtuallyDerived \\*\\) $nonzero_hex" \ | |
154 | "dynamic_cast simple downcast to intermediate class" | |
155 | ||
156 | gdb_test "print dynamic_cast<VirtuallyDerived *> (ad)" \ | |
157 | " = \\(VirtuallyDerived \\*\\) 0x0" \ | |
158 | "dynamic_cast to non-existing base" | |
159 | ||
160 | gdb_test "print dynamic_cast<VirtuallyDerived &> (*ad)" \ | |
161 | "dynamic_cast failed" \ | |
162 | "dynamic_cast to reference to non-existing base" | |
163 | ||
164 | gdb_test "print dynamic_cast<DoublyDerived *> (add)" \ | |
165 | " = \\(DoublyDerived \\*\\) $nonzero_hex" \ | |
166 | "dynamic_cast unique downcast" | |
167 | ||
168 | gdb_test "print dynamic_cast<Gamma *> (add)" \ | |
169 | " = \\(Gamma \\*\\) $nonzero_hex" \ | |
170 | "dynamic_cast to sibling" |