* gdb.c++/casts.cc, gdb.c++/casts.exp: New test.
This commit is contained in:
parent
36dc181bba
commit
10abb1d48f
|
@ -1,3 +1,7 @@
|
||||||
|
2002-10-02 Jim Blandy <jimb@redhat.com>
|
||||||
|
|
||||||
|
* gdb.c++/casts.cc, gdb.c++/casts.exp: New test.
|
||||||
|
|
||||||
2002-10-01 Andrew Cagney <ac131313@redhat.com>
|
2002-10-01 Andrew Cagney <ac131313@redhat.com>
|
||||||
|
|
||||||
* mi1-basics.exp: Copy of mi1-basics.exp MIFLAGS set "-i=mi1".
|
* mi1-basics.exp: Copy of mi1-basics.exp MIFLAGS set "-i=mi1".
|
||||||
|
|
|
@ -0,0 +1,20 @@
|
||||||
|
struct A
|
||||||
|
{
|
||||||
|
int a;
|
||||||
|
A (int aa): a (aa) {}
|
||||||
|
};
|
||||||
|
|
||||||
|
struct B: public A
|
||||||
|
{
|
||||||
|
int b;
|
||||||
|
B (int aa, int bb): A (aa), b(bb) {}
|
||||||
|
};
|
||||||
|
|
||||||
|
int
|
||||||
|
main (int argc, char **argv)
|
||||||
|
{
|
||||||
|
A *a = new B(42, 1729);
|
||||||
|
B *b = (B *) a;
|
||||||
|
|
||||||
|
return 0; /* breakpoint spot: casts.exp: 1 */
|
||||||
|
}
|
|
@ -0,0 +1,80 @@
|
||||||
|
# Copyright 2002 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 2 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, write to the Free Software
|
||||||
|
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
||||||
|
|
||||||
|
# Please email any bugs, comments, and/or additions to this file to:
|
||||||
|
# bug-gdb@prep.ai.mit.edu
|
||||||
|
|
||||||
|
# This file is part of the gdb testsuite
|
||||||
|
|
||||||
|
# Test casting, especially between class types or pointer-to-class
|
||||||
|
# types.
|
||||||
|
|
||||||
|
# This file is part of the gdb testsuite
|
||||||
|
|
||||||
|
if $tracelevel then {
|
||||||
|
strace $tracelevel
|
||||||
|
}
|
||||||
|
|
||||||
|
#
|
||||||
|
# test running programs
|
||||||
|
#
|
||||||
|
|
||||||
|
set prms_id 0
|
||||||
|
set bug_id 0
|
||||||
|
|
||||||
|
if { [skip_cplus_tests] } { continue }
|
||||||
|
|
||||||
|
set testfile "casts"
|
||||||
|
set srcfile ${testfile}.cc
|
||||||
|
set binfile ${objdir}/${subdir}/${testfile}
|
||||||
|
|
||||||
|
if [get_compiler_info ${binfile} "c++"] {
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
|
||||||
|
if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug c++}] != "" } {
|
||||||
|
gdb_suppress_entire_file "Testcase compile failed, so all tests in this file will automatically fail."
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
gdb_exit
|
||||||
|
gdb_start
|
||||||
|
gdb_reinitialize_dir $srcdir/$subdir
|
||||||
|
gdb_load ${binfile}
|
||||||
|
|
||||||
|
gdb_test "break [gdb_get_line_number "casts.exp: 1"]" \
|
||||||
|
"Breakpoint.*at.* file .*" \
|
||||||
|
""
|
||||||
|
|
||||||
|
gdb_test "run" "Breakpoint .* at casts.cc" ""
|
||||||
|
|
||||||
|
# Casting a pointer to a base class to a pointer to a derived class
|
||||||
|
# should yield the entire derived class. Until August 2002, GDB got
|
||||||
|
# the enclosing type on `(B *) a' wrong: while the value's static type
|
||||||
|
# was `B *', as it should be, the enclosing type (which is supposed to
|
||||||
|
# be the dynamic type) was `A *'. It's senseless to have a static
|
||||||
|
# type derived from the dynamic type; it should be the other way
|
||||||
|
# 'round. Dereferencing this oddly typed pointer yielded a value in
|
||||||
|
# which only the base class's members were initialized, since GDB uses
|
||||||
|
# the enclosing type to decide how many bytes to read. Members from
|
||||||
|
# the derived class were garbage, from GDB's address space.
|
||||||
|
gdb_test "print * (B *) a" ".* = {<A> = {a = 42}, b = 1729}" \
|
||||||
|
"cast base class pointer to derived class pointer"
|
||||||
|
|
||||||
|
# Check also that we get the same results from letting the compiler do
|
||||||
|
# the dereference.
|
||||||
|
gdb_test "print * b" ".* = {<A> = {a = 42}, b = 1729}" \
|
||||||
|
"let compiler cast base class pointer to derived class pointer"
|
Loading…
Reference in New Issue