projects / deliverable / binutils-gdb.git / blame
| Commit | Line | Data |
|---|---|---|
| 10abb1d4 JB |
1 | # Copyright 2002 Free Software Foundation, Inc. |
| 2 | ||
| 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 2 of the License, or | |
| 6 | # (at your option) any later version. | |
| 7 | # | |
| 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. | |
| 12 | # | |
| 13 | # You should have received a copy of the GNU General Public License | |
| 14 | # along with this program; if not, write to the Free Software | |
| 15 | # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
| 16 | ||
| 17 | # Please email any bugs, comments, and/or additions to this file to: | |
| 18 | # bug-gdb@prep.ai.mit.edu | |
| 19 | ||
| 20 | # This file is part of the gdb testsuite | |
| 21 | ||
| 22 | # Test casting, especially between class types or pointer-to-class | |
| 23 | # types. | |
| 24 | ||
| 25 | # This file is part of the gdb testsuite | |
| 26 | ||
| 27 | if $tracelevel then { | |
| 28 | strace $tracelevel | |
| 29 | } | |
| 30 | ||
| 31 | # | |
| 32 | # test running programs | |
| 33 | # | |
| 34 | ||
| 35 | set prms_id 0 | |
| 36 | set bug_id 0 | |
| 37 | ||
| 38 | if { [skip_cplus_tests] } { continue } | |
| 39 | ||
| 40 | set testfile "casts" | |
| 41 | set srcfile ${testfile}.cc | |
| 42 | set binfile ${objdir}/${subdir}/${testfile} | |
| 43 | ||
| 44 | if [get_compiler_info ${binfile} "c++"] { | |
| 45 | return -1; | |
| 46 | } | |
| 47 | ||
| 48 | if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug c++}] != "" } { | |
| 49 | gdb_suppress_entire_file "Testcase compile failed, so all tests in this file will automatically fail." | |
| 50 | } | |
| 51 | ||
| 52 | ||
| 53 | gdb_exit | |
| 54 | gdb_start | |
| 55 | gdb_reinitialize_dir $srcdir/$subdir | |
| 56 | gdb_load ${binfile} | |
| 57 | ||
| 58 | gdb_test "break [gdb_get_line_number "casts.exp: 1"]" \ | |
| 59 | "Breakpoint.*at.* file .*" \ | |
| 60 | "" | |
| 61 | ||
| 62 | gdb_test "run" "Breakpoint .* at casts.cc" "" | |
| 63 | ||
| 64 | # Casting a pointer to a base class to a pointer to a derived class | |
| 65 | # should yield the entire derived class. Until August 2002, GDB got | |
| 66 | # the enclosing type on `(B *) a' wrong: while the value's static type | |
| 67 | # was `B *', as it should be, the enclosing type (which is supposed to | |
| 68 | # be the dynamic type) was `A *'. It's senseless to have a static | |
| 69 | # type derived from the dynamic type; it should be the other way | |
| 70 | # 'round. Dereferencing this oddly typed pointer yielded a value in | |
| 71 | # which only the base class's members were initialized, since GDB uses | |
| 72 | # the enclosing type to decide how many bytes to read. Members from | |
| 73 | # the derived class were garbage, from GDB's address space. | |
| 74 | gdb_test "print * (B *) a" ".* = {<A> = {a = 42}, b = 1729}" \ | |
| 75 | "cast base class pointer to derived class pointer" | |
| 76 | ||
| 77 | # Check also that we get the same results from letting the compiler do | |
| 78 | # the dereference. | |
| 79 | gdb_test "print * b" ".* = {<A> = {a = 42}, b = 1729}" \ | |
| 80 | "let compiler cast base class pointer to derived class pointer" |