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# Copyright 2008, 2009, 2010 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 .

# 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 ![target_info exists gdb,can_reverse] {

    return

}

set testfile "machinestate"

set srcfile  ${testfile}.c

set srcfile1 ms1.c

if { [prepare_for_testing $testfile.exp $testfile {machinestate.c ms1.c} ] } {

    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 [target_info exists gdb,use_precord] {

    # 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"