1 # This testcase is part of GDB, the GNU debugger.
3 # Copyright 1998, 1999, 2000, 2001, 2002, 2004, 2007
4 # Free Software Foundation, Inc.
6 # This program is free software; you can redistribute it and/or modify
7 # it under the terms of the GNU General Public License as published by
8 # the Free Software Foundation; either version 2 of the License, or
9 # (at your option) any later version.
11 # This program is distributed in the hope that it will be useful,
12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 # GNU General Public License for more details.
16 # You should have received a copy of the GNU General Public License
17 # along with this program; if not, write to the Free Software
18 # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20 # Test GDB's ability to restore saved registers from stack frames
21 # when using the `return' command.
23 # This file was written by Jim Blandy <jimb@cygnus.com>, with
24 # fragments borrowed from return.exp.
33 set testfile "restore"
34 set srcfile ${testfile}.c
35 set binfile ${objdir}/${subdir}/${testfile}
36 if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
41 proc restore_tests { } {
44 if { ! [ runto driver ] } {
50 # For each caller function,
51 # call each of the callee functions,
52 # force a return from the callee, and
53 # make sure that the local variables still have the right values.
55 for {set c 1} {$c <= $limit} {incr c} {
57 # Set a breakpoint at the next caller function.
58 gdb_test "tbreak caller$c" "Breakpoint.*\[0-9\]*\\." \
61 # Continue to the next caller function.
62 gdb_test "continue" " caller$c prologue .*" "run to caller$c"
64 # Do each callee function.
65 for {set e 1} {$e <= $limit} {incr e} {
67 gdb_test "tbreak callee$e" "Breakpoint.*\[0-9\]*\\." \
68 "caller$c calls callee$e; tbreak callee"
70 gdb_test "continue" " callee$e prologue .*/" \
71 "caller$c calls callee$e; continue to callee"
73 # Do a forced return from the callee.
74 set test "caller$c calls callee$e; return callee now"
75 gdb_test_multiple "return 0" "$test" {
76 -re "Make .* return now.*y or n. $" {
80 -re " caller$c .*$gdb_prompt $" {
85 # Check that the values of the local variables are what
87 for {set var 1} {$var <= $c} {incr var} {
88 set expected [expr 0x7eeb + $var]
89 gdb_test "print l$var" " = $expected" \
90 "caller$c calls callee$e; return restored l$var to $expected"
95 if ![gdb_skip_stdio_test "run to completion"] {
100 pass "run to completion"
103 fail "(timeout) run to completion"
107 gdb_test "continue" "" ""
113 # Start with a fresh gdb.
117 gdb_reinitialize_dir $srcdir/$subdir