# This testcase is part of GDB, the GNU debugger.
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# This testcase is part of GDB, the GNU debugger.
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# Copyright 1998, 1999, 2000, 2001, 2002, 2004, 2007, 2008, 2009, 2010
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# Copyright 1998, 1999, 2000, 2001, 2002, 2004, 2007, 2008, 2009, 2010
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# Free Software Foundation, Inc.
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# Free Software Foundation, Inc.
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# This program is free software; you can redistribute it and/or modify
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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# (at your option) any later version.
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#
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#
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# This program is distributed in the hope that it will be useful,
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# GNU General Public License for more details.
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#
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#
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# You should have received a copy of the GNU General Public License
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see .
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# along with this program. If not, see .
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# Test GDB's ability to restore saved registers from stack frames
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# Test GDB's ability to restore saved registers from stack frames
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# when using the `return' command.
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# when using the `return' command.
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#
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#
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# This file was written by Jim Blandy , with
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# This file was written by Jim Blandy , with
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# fragments borrowed from return.exp.
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# fragments borrowed from return.exp.
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if $tracelevel then {
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if $tracelevel then {
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strace $tracelevel
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strace $tracelevel
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}
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}
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set prms_id 0
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set prms_id 0
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set bug_id 0
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set bug_id 0
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set testfile "restore"
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set testfile "restore"
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set srcfile ${testfile}.c
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set srcfile ${testfile}.c
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set binfile ${objdir}/${subdir}/${testfile}
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set binfile ${objdir}/${subdir}/${testfile}
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if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
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if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
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untested restore.exp
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untested restore.exp
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return -1
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return -1
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}
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}
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proc restore_tests { } {
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proc restore_tests { } {
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global gdb_prompt
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global gdb_prompt
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if { ! [ runto driver ] } {
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if { ! [ runto driver ] } {
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return 0
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return 0
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}
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}
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set limit 5
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set limit 5
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# For each caller function,
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# For each caller function,
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# call each of the callee functions,
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# call each of the callee functions,
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# force a return from the callee, and
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# force a return from the callee, and
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# make sure that the local variables still have the right values.
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# make sure that the local variables still have the right values.
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for {set c 1} {$c <= $limit} {incr c} {
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for {set c 1} {$c <= $limit} {incr c} {
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# Set a breakpoint at the next caller function.
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# Set a breakpoint at the next caller function.
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gdb_test "tbreak caller$c" "Temporary breakpoint.*\[0-9\]*\\." \
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gdb_test "tbreak caller$c" "Temporary breakpoint.*\[0-9\]*\\." \
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"tbreak caller$c"
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"tbreak caller$c"
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# Continue to the next caller function.
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# Continue to the next caller function.
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gdb_test "continue" " caller$c prologue .*" "run to caller$c"
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gdb_test "continue" " caller$c prologue .*" "run to caller$c"
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# Do each callee function.
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# Do each callee function.
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for {set e 1} {$e <= $limit} {incr e} {
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for {set e 1} {$e <= $limit} {incr e} {
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gdb_test "tbreak callee$e" "Temporary breakpoint.*\[0-9\]*\\." \
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gdb_test "tbreak callee$e" "Temporary breakpoint.*\[0-9\]*\\." \
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"caller$c calls callee$e; tbreak callee"
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"caller$c calls callee$e; tbreak callee"
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gdb_test "continue" " callee$e prologue .*/" \
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gdb_test "continue" " callee$e prologue .*/" \
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"caller$c calls callee$e; continue to callee"
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"caller$c calls callee$e; continue to callee"
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# Do a forced return from the callee.
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# Do a forced return from the callee.
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set test "caller$c calls callee$e; return callee now"
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set test "caller$c calls callee$e; return callee now"
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gdb_test_multiple "return 0" "$test" {
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gdb_test_multiple "return 0" "$test" {
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-re "Make .* return now.*y or n. $" {
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-re "Make .* return now.*y or n. $" {
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send_gdb "y\n"
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send_gdb "y\n"
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exp_continue
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exp_continue
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}
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}
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-re " caller$c .*$gdb_prompt $" {
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-re " caller$c .*$gdb_prompt $" {
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pass "$test"
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pass "$test"
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}
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}
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}
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}
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# Check that the values of the local variables are what
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# Check that the values of the local variables are what
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# they should be.
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# they should be.
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for {set var 1} {$var <= $c} {incr var} {
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for {set var 1} {$var <= $c} {incr var} {
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set expected [expr 0x7eeb + $var]
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set expected [expr 0x7eeb + $var]
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gdb_test "print l$var" " = $expected" \
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gdb_test "print l$var" " = $expected" \
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"caller$c calls callee$e; return restored l$var to $expected"
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"caller$c calls callee$e; return restored l$var to $expected"
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}
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}
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}
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}
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}
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}
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if ![gdb_skip_stdio_test "run to completion"] {
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if ![gdb_skip_stdio_test "run to completion"] {
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send_gdb "continue\n"
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send_gdb "continue\n"
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gdb_expect {
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gdb_expect {
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-re "exiting" {
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-re "exiting" {
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pass "run to completion"
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pass "run to completion"
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}
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}
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timeout {
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timeout {
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fail "(timeout) run to completion"
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fail "(timeout) run to completion"
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}
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}
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}
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}
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} else {
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} else {
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gdb_test "continue" "" ""
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gdb_test "continue" "" ""
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}
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}
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}
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}
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# Start with a fresh gdb.
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# Start with a fresh gdb.
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gdb_exit
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gdb_exit
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gdb_start
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gdb_start
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gdb_reinitialize_dir $srcdir/$subdir
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gdb_reinitialize_dir $srcdir/$subdir
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gdb_load ${binfile}
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gdb_load ${binfile}
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set prev_timeout $timeout
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set prev_timeout $timeout
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set timeout 30
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set timeout 30
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restore_tests
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restore_tests
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set timeout $prev_timeout
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set timeout $prev_timeout
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