1 # This testcase is part of GDB, the GNU debugger.
3 # Copyright 1998-2013 Free Software Foundation, Inc.
5 # This program is free software; you can redistribute it and/or modify
6 # it under the terms of the GNU General Public License as published by
7 # the Free Software Foundation; either version 3 of the License, or
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10 # This program is distributed in the hope that it will be useful,
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12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 # GNU General Public License for more details.
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18 # Test GDB's ability to restore saved registers from stack frames
19 # when using the `return' command.
21 # This file was written by Jim Blandy <jimb@cygnus.com>, with
22 # fragments borrowed from return.exp.
25 set testfile "restore"
26 set srcfile ${testfile}.c
27 set binfile ${objdir}/${subdir}/${testfile}
28 if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
33 proc restore_tests { } {
36 if { ! [ runto driver ] } {
42 # For each caller function,
43 # call each of the callee functions,
44 # force a return from the callee, and
45 # make sure that the local variables still have the right values.
47 for {set c 1} {$c <= $limit} {incr c} {
49 # Set a breakpoint at the next caller function.
50 gdb_test "tbreak caller$c" "Temporary breakpoint.*\[0-9\]*\\." \
53 # Continue to the next caller function.
54 gdb_test "continue" " caller$c prologue .*" "run to caller$c"
56 # Do each callee function.
57 for {set e 1} {$e <= $limit} {incr e} {
59 gdb_test "tbreak callee$e" "Temporary breakpoint.*\[0-9\]*\\." \
60 "caller$c calls callee$e; tbreak callee"
62 gdb_test "continue" " callee$e prologue .*/" \
63 "caller$c calls callee$e; continue to callee"
65 # Do a forced return from the callee.
66 set test "caller$c calls callee$e; return callee now"
71 "Make .* return now.*y or n. $" \
74 # Check that the values of the local variables are what
76 for {set var 1} {$var <= $c} {incr var} {
77 set expected [expr 0x7eeb + $var]
78 gdb_test "print l$var" " = $expected" \
79 "caller$c calls callee$e; return restored l$var to $expected"
84 if ![gdb_skip_stdio_test "run to completion"] {
89 pass "run to completion"
92 fail "(timeout) run to completion"
96 gdb_test "continue" ".*" ""
102 # Start with a fresh gdb.
106 gdb_reinitialize_dir $srcdir/$subdir
109 set prev_timeout $timeout
112 set timeout $prev_timeout