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# Copyright 2008-2017 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 3 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, see <http://www.gnu.org/licenses/>.
# This file is part of the GDB testsuite.
# This test tests the restoration of various kinds of machine state
# to their original values by reverse execution. We will execute
# the program forward while it changes various types of data, and
# then execute it backward to see if their values get restored.
#
# The types of machine state (data) that are tested are:
# register variable
# auto variable
# function static variable
# module static variable
# module global variable
#
# TODO:
# various, possibly including...
# .bss variable, .data variable, ...
# shared library variable
# heap variable (pointer)...
# overlay variables...
# Test forward replay
#
if ![supports_reverse] {
return
}
standard_testfile .c ms1.c
if { [prepare_for_testing "failed to prepare" $testfile \
[list $srcfile $srcfile2]] } {
return -1
}
set newline "\[\r\n\]+"
set beginmain [gdb_get_line_number " begin main " $srcfile]
set endmain [gdb_get_line_number " end main " $srcfile]
# Test begins
runto main
if [supports_process_record] {
# Activate process record/replay
gdb_test_no_output "record" "turn on process record"
}
# Proceed to end of main
gdb_test "break $endmain" \
"Breakpoint.* file .*$srcfile, line $endmain.*" ""
gdb_continue_to_breakpoint "end of main" ".*$srcfile:$endmain.*"
###
###
###
# Now run backward to each of several points where data is changed.
#
# Module global variable, reverse
set breakloc [gdb_get_line_number \
"module_global_state: set breakpoint here" $srcfile]
gdb_test "tbreak $breakloc" ".*$srcfile, line $breakloc.*" ""
gdb_test "reverse-continue" ".*$srcfile:$breakloc.*" "reverse to $breakloc"
gdb_test "print aglobal" ".* = 0$newline" "module global reverse-breakpoint"
gdb_test "step" ".* module global post-change .*" ""
gdb_test "print aglobal" ".* = 1$newline" "module global forward past bp"
gdb_test "reverse-step" ".*$newline$breakloc.*" ""
gdb_test "print aglobal" ".* = 0$newline" "module global reverse-step to bp"
# Module static variable, reverse
set breakloc [gdb_get_line_number \
"module_static_state: set breakpoint here" $srcfile]
gdb_test "tbreak $breakloc" ".*$srcfile, line $breakloc.*" ""
gdb_test "reverse-continue" ".*$srcfile:$breakloc.*" "reverse to $breakloc"
gdb_test "print astatic" ".* = 0$newline" "module static reverse-breakpoint"
gdb_test "step" ".* module static post-change .*" ""
gdb_test "print astatic" ".* = 1$newline" "module static forward"
gdb_test "reverse-step" ".*$newline$breakloc.*" ""
gdb_test "print astatic" ".* = 0$newline" "module static reverse-step"
# Function static variable, reverse
set breakloc [gdb_get_line_number \
"function_static_state: set breakpoint here" $srcfile]
gdb_test "tbreak $breakloc" ".*$srcfile, line $breakloc.*" ""
gdb_test "reverse-continue" ".*$srcfile:$breakloc.*" "reverse to $breakloc"
gdb_test "print a" ".* = 0$newline" "function static reverse-breakpoint"
gdb_test "step" ".* function static post-change .*" ""
gdb_test "print a" ".* = 1$newline" "function static forward"
gdb_test "reverse-step" ".*$newline$breakloc.*" ""
gdb_test "print a" ".* = 0$newline" "function static reverse-step"
# Auto variable, reverse
set breakloc [gdb_get_line_number \
"auto_state: set breakpoint here" $srcfile]
gdb_test "tbreak $breakloc" ".*$srcfile, line $breakloc.*" ""
gdb_test "reverse-continue" ".*$srcfile:$breakloc.*" "reverse to $breakloc"
gdb_test "print a" ".* = 0$newline" "auto var reverse-breakpoint"
gdb_test "step" ".* auto post-change .*" ""
gdb_test "print a" ".* = 1$newline" "auto var forward"
gdb_test "reverse-step" ".*$newline$breakloc.*" ""
gdb_test "print a" ".* = 0$newline" "auto var reverse-step"
# Register variable, reverse
set breakloc [gdb_get_line_number \
"register_state: set breakpoint here" $srcfile]
gdb_test "tbreak $breakloc" ".*$srcfile, line $breakloc.*" ""
gdb_test "reverse-continue" ".*$srcfile:$breakloc.*" "reverse to $breakloc"
gdb_test "print a" ".* = 0$newline" "register var reverse-breakpoint"
gdb_test "step" ".* register post-change .*" ""
gdb_test "print a" ".* = 1$newline" "register var step post-change"
gdb_test "reverse-step" ".*$newline$breakloc.*" ""
gdb_test "print a" ".* = 0$newline" "register var reverse step-to"
# Proceed to beginning of main
gdb_test "tbreak $beginmain" ".*$srcfile, line $beginmain.*" ""
gdb_test "reverse-continue" ".*$srcfile:$beginmain.*" "reverse to main"
# Now repeat tests while replaying forward.
# Register variable, forward
set breakloc [gdb_get_line_number \
"register_state: set breakpoint here" $srcfile]
gdb_test "tbreak $breakloc" ".*$srcfile, line $breakloc.*" ""
gdb_test "continue" ".*$srcfile:$breakloc.*" "forward to $breakloc"
gdb_test "print a" ".* = 0$newline" "register var forward-breakpoint"
gdb_test "reverse-step" ".*hide.*" ""
gdb_test "step" ".*$newline$breakloc.*" ""
gdb_test "print a" ".* = 0$newline" "register var forward step-to"
gdb_test "step" ".* register post-change .*" ""
gdb_test "print a" ".* = 1$newline" "register var step post-change"
# Auto variable, forward
set breakloc [gdb_get_line_number \
"auto_state: set breakpoint here" $srcfile]
gdb_test "tbreak $breakloc" ".*$srcfile, line $breakloc.*" ""
gdb_test "continue" ".*$srcfile:$breakloc.*" "forward to $breakloc"
gdb_test "print a" ".* = 0$newline" "auto var forward-breakpoint"
gdb_test "reverse-step" ".*hide.*" ""
gdb_test "step" ".*$newline$breakloc.*" ""
gdb_test "print a" ".* = 0$newline" "auto var forward step-to"
gdb_test "step" ".* auto post-change .*" ""
gdb_test "print a" ".* = 1$newline" "auto var step post-change"
# Function static variable, forward
set breakloc [gdb_get_line_number \
"function_static_state: set breakpoint here" $srcfile]
gdb_test "tbreak $breakloc" ".*$srcfile, line $breakloc.*" ""
gdb_test "continue" ".*$srcfile:$breakloc.*" "forward to $breakloc"
gdb_test "print a" ".* = 0$newline" "function static forward-breakpoint"
gdb_test "reverse-step" ".*hide.*" ""
gdb_test "step" ".*$newline$breakloc.*" ""
gdb_test "print a" ".* = 0$newline" "function static forward step-to"
gdb_test "step" ".* function static post-change .*" ""
gdb_test "print a" ".* = 1$newline" "function static step post-change"
# Module static variable, forward
set breakloc [gdb_get_line_number \
"module_static_state: set breakpoint here" $srcfile]
gdb_test "tbreak $breakloc" ".*$srcfile, line $breakloc.*" ""
gdb_test "continue" ".*$srcfile:$breakloc.*" "forward to $breakloc"
gdb_test "print astatic" ".* = 0$newline" "module static forward-breakpoint"
gdb_test "reverse-step" ".*hide.*" ""
gdb_test "step" ".*$newline$breakloc.*" ""
gdb_test "print astatic" ".* = 0$newline" "module static forward step-to"
gdb_test "step" ".* module static post-change .*" ""
gdb_test "print astatic" ".* = 1$newline" "module static step post-change"
# Module global variable, forward
set breakloc [gdb_get_line_number \
"module_global_state: set breakpoint here" $srcfile]
gdb_test "tbreak $breakloc" ".*$srcfile, line $breakloc.*" ""
gdb_test "continue" ".*$srcfile:$breakloc.*" "forward to $breakloc"
gdb_test "print aglobal" ".* = 0$newline" "module global forward-breakpoint"
gdb_test "reverse-step" ".*hide.*" ""
gdb_test "step" ".*$newline$breakloc.*" ""
gdb_test "print aglobal" ".* = 0$newline" "module global forward step-to"
gdb_test "step" ".* module global post-change .*" ""
gdb_test "print aglobal" ".* = 1$newline" "module global step post-change"
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