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# Copyright (C) 1998 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
# Test GDB's ability to restore saved registers from stack frames
# when using the `return' command.
#
# This file was written by Jim Blandy <jimb@cygnus.com>, with
# fragments borrowed from return.exp.
if $tracelevel then {
strace $tracelevel
}
set prms_id 0
set bug_id 0
set testfile "restore"
set srcfile ${testfile}.c
set binfile ${objdir}/${subdir}/${testfile}
if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
gdb_suppress_entire_file "Testcase compile failed, so all tests in this file will automatically fail."
}
proc restore_tests { } {
global gdb_prompt
if { ! [ runto driver ] } then { return 0 }
set limit 5
# Set breakpoints at each of the `caller' functions.
for {set c 1} {$c <= $limit} {incr c} {
gdb_test "break caller$c" "Breakpoint.*\[0-9\]*\\." "break caller$c"
}
# Set breakpoints at each of the `callee' functions.
for {set c 1} {$c <= $limit} {incr c} {
gdb_test "break callee$c" "Breakpoint.*\[0-9\]*\\." "break caller$c"
}
# For each caller function,
# call each of the callee functions,
# force a return from the callee, and
# make sure that the local variables still have the right values.
for {set c 1} {$c <= $limit} {incr c} {
# Continue to the next caller function.
gdb_test "continue" ".*/\\* caller$c \\*/" "run to caller$c"
# Do each callee function.
for {set e 1} {$e <= $limit} {incr e} {
gdb_test " continue" ".*/\\* callee$e \\*/" "run to callee$e"
# Do a forced return from the callee.
send_gdb "return 0\n"
gdb_expect {
-re "Make .* return now.*y or n. $" {
send_gdb "y\n"
exp_continue
}
-re "$gdb_prompt $" { }
}
# Check that the values of the local variables are what
# they should be.
for {set var 1} {$var <= $c} {incr var} {
set expected [expr 0x7eeb + $var]
gdb_test "print l$var" " = $expected" \
"caller$c called callee$e; variable l$var restored"
}
}
}
if ![gdb_skip_stdio_test "run to completion"] {
send_gdb "continue\n"
gdb_expect {
-re "exiting" {
pass "run to completion"
}
timeout {
fail "(timeout) run to completion"
}
}
} else {
gdb_test "continue" "" ""
}
}
# Start with a fresh gdb.
gdb_exit
gdb_start
gdb_reinitialize_dir $srcdir/$subdir
gdb_load ${binfile}
set timeout 30
restore_tests
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