gdb/testsuite/gdb.reverse/machinestate.exp

   1 # Copyright 2008-2016 Free Software Foundation, Inc.
   2
   3 # This program is free software; you can redistribute it and/or modify
   4 # it under the terms of the GNU General Public License as published by
   5 # the Free Software Foundation; either version 3 of the License, or
   6 # (at your option) any later version.
   7 #
   8 # This program is distributed in the hope that it will be useful,
   9 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  10 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11 # GNU General Public License for more details.
  12 #
  13 # You should have received a copy of the GNU General Public License
  14 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  15
  16 # This file is part of the GDB testsuite.
  17 # This test tests the restoration of various kinds of machine state
  18 # to their original values by reverse execution.  We will execute
  19 # the program forward while it changes various types of data, and
  20 # then execute it backward to see if their values get restored.
  21 #
  22 # The types of machine state (data) that are tested are:
  23 #   register variable
  24 #   auto variable
  25 #   function static variable
  26 #   module static variable
  27 #   module global variable
  28 #
  29 # TODO:
  30 # various, possibly including...
  31 #   .bss variable, .data variable, ...
  32 #   shared library variable
  33 #   heap variable (pointer)...
  34 #   overlay variables...
  35 #   Test forward replay
  36 #
  37
  38 if ![supports_reverse] {
  39     return
  40 }
  41
  42 standard_testfile .c ms1.c
  43
  44 if { [prepare_for_testing "failed to prepare" $testfile \
  45           [list $srcfile $srcfile2]] } {
  46     return -1
  47 }
  48
  49 set newline "\[\r\n\]+"
  50
  51 set beginmain [gdb_get_line_number " begin main " $srcfile]
  52 set endmain   [gdb_get_line_number " end main "   $srcfile]
  53
  54 # Test begins
  55
  56 runto main
  57
  58 if [supports_process_record] {
  59     # Activate process record/replay
  60     gdb_test_no_output "record" "turn on process record"
  61 }
  62
  63 # Proceed to end of main
  64
  65 gdb_test "break $endmain" \
  66     "Breakpoint.* file .*$srcfile, line $endmain.*" ""
  67 gdb_continue_to_breakpoint "end of main" ".*$srcfile:$endmain.*"
  68
  69 ###
  70 ###
  71 ###
  72
  73 # Now run backward to each of several points where data is changed.
  74 #
  75
  76 # Module global variable, reverse
  77
  78 set breakloc [gdb_get_line_number \
  79                   "module_global_state: set breakpoint here" $srcfile]
  80
  81 gdb_test "tbreak $breakloc" ".*$srcfile, line $breakloc.*" ""
  82 gdb_test "reverse-continue" ".*$srcfile:$breakloc.*" "reverse to $breakloc"
  83
  84 gdb_test "print aglobal" ".* = 0$newline"  "module global reverse-breakpoint"
  85 gdb_test "step"          ".* module global post-change .*" ""
  86 gdb_test "print aglobal" ".* = 1$newline"  "module global forward past bp"
  87 gdb_test "reverse-step"  ".*$newline$breakloc.*" ""
  88 gdb_test "print aglobal" ".* = 0$newline"  "module global reverse-step to bp"
  89
  90
  91 # Module static variable, reverse
  92
  93 set breakloc [gdb_get_line_number \
  94                   "module_static_state: set breakpoint here" $srcfile]
  95
  96 gdb_test "tbreak $breakloc" ".*$srcfile, line $breakloc.*" ""
  97 gdb_test "reverse-continue" ".*$srcfile:$breakloc.*" "reverse to $breakloc"
  98
  99 gdb_test "print astatic" ".* = 0$newline"  "module static reverse-breakpoint"
 100 gdb_test "step"          ".* module static post-change .*" ""
 101 gdb_test "print astatic" ".* = 1$newline"  "module static forward"
 102 gdb_test "reverse-step"  ".*$newline$breakloc.*" ""
 103 gdb_test "print astatic" ".* = 0$newline"  "module static reverse-step"
 104
 105 # Function static variable, reverse
 106
 107 set breakloc [gdb_get_line_number \
 108                   "function_static_state: set breakpoint here" $srcfile]
 109
 110 gdb_test "tbreak $breakloc" ".*$srcfile, line $breakloc.*" ""
 111 gdb_test "reverse-continue" ".*$srcfile:$breakloc.*" "reverse to $breakloc"
 112
 113 gdb_test "print a"      ".* = 0$newline"  "function static reverse-breakpoint"
 114 gdb_test "step"         ".* function static post-change .*" ""
 115 gdb_test "print a"      ".* = 1$newline"  "function static forward"
 116 gdb_test "reverse-step" ".*$newline$breakloc.*" ""
 117 gdb_test "print a"      ".* = 0$newline"  "function static reverse-step"
 118
 119 # Auto variable, reverse
 120
 121 set breakloc [gdb_get_line_number \
 122                   "auto_state: set breakpoint here" $srcfile]
 123
 124 gdb_test "tbreak $breakloc" ".*$srcfile, line $breakloc.*" ""
 125 gdb_test "reverse-continue" ".*$srcfile:$breakloc.*" "reverse to $breakloc"
 126
 127 gdb_test "print a"      ".* = 0$newline"  "auto var reverse-breakpoint"
 128 gdb_test "step"         ".* auto post-change .*" ""
 129 gdb_test "print a"      ".* = 1$newline"  "auto var forward"
 130 gdb_test "reverse-step" ".*$newline$breakloc.*" ""
 131 gdb_test "print a"      ".* = 0$newline"  "auto var reverse-step"
 132
 133 # Register variable, reverse
 134
 135 set breakloc [gdb_get_line_number \
 136                   "register_state: set breakpoint here" $srcfile]
 137
 138 gdb_test "tbreak $breakloc" ".*$srcfile, line $breakloc.*" ""
 139 gdb_test "reverse-continue" ".*$srcfile:$breakloc.*" "reverse to $breakloc"
 140
 141 gdb_test "print a"      ".* = 0$newline"  "register var reverse-breakpoint"
 142 gdb_test "step"         ".* register post-change .*" ""
 143 gdb_test "print a"      ".* = 1$newline"  "register var step post-change"
 144 gdb_test "reverse-step" ".*$newline$breakloc.*" ""
 145 gdb_test "print a"      ".* = 0$newline"  "register var reverse step-to"
 146
 147 # Proceed to beginning of main
 148
 149 gdb_test "tbreak $beginmain" ".*$srcfile, line $beginmain.*" ""
 150 gdb_test "reverse-continue"  ".*$srcfile:$beginmain.*" "reverse to main"
 151
 152 # Now repeat tests while replaying forward.
 153
 154 # Register variable, forward
 155
 156 set breakloc [gdb_get_line_number \
 157                   "register_state: set breakpoint here" $srcfile]
 158
 159 gdb_test "tbreak $breakloc" ".*$srcfile, line $breakloc.*" ""
 160 gdb_test "continue"         ".*$srcfile:$breakloc.*" "forward to $breakloc"
 161
 162 gdb_test "print a"      ".* = 0$newline"  "register var forward-breakpoint"
 163 gdb_test "reverse-step" ".*hide.*" ""
 164 gdb_test "step"         ".*$newline$breakloc.*" ""
 165 gdb_test "print a"      ".* = 0$newline"  "register var forward step-to"
 166 gdb_test "step"         ".* register post-change .*" ""
 167 gdb_test "print a"      ".* = 1$newline"  "register var step post-change"
 168
 169 # Auto variable, forward
 170
 171 set breakloc [gdb_get_line_number \
 172                   "auto_state: set breakpoint here" $srcfile]
 173
 174 gdb_test "tbreak $breakloc" ".*$srcfile, line $breakloc.*" ""
 175 gdb_test "continue"         ".*$srcfile:$breakloc.*" "forward to $breakloc"
 176
 177 gdb_test "print a"      ".* = 0$newline"  "auto var forward-breakpoint"
 178 gdb_test "reverse-step" ".*hide.*" ""
 179 gdb_test "step"         ".*$newline$breakloc.*" ""
 180 gdb_test "print a"      ".* = 0$newline"  "auto var forward step-to"
 181 gdb_test "step"         ".* auto post-change .*" ""
 182 gdb_test "print a"      ".* = 1$newline"  "auto var step post-change"
 183
 184 # Function static variable, forward
 185
 186 set breakloc [gdb_get_line_number \
 187                   "function_static_state: set breakpoint here" $srcfile]
 188
 189 gdb_test "tbreak $breakloc" ".*$srcfile, line $breakloc.*" ""
 190 gdb_test "continue"         ".*$srcfile:$breakloc.*" "forward to $breakloc"
 191
 192 gdb_test "print a"      ".* = 0$newline"  "function static forward-breakpoint"
 193 gdb_test "reverse-step" ".*hide.*" ""
 194 gdb_test "step"         ".*$newline$breakloc.*" ""
 195 gdb_test "print a"      ".* = 0$newline"  "function static forward step-to"
 196 gdb_test "step"         ".* function static post-change .*" ""
 197 gdb_test "print a"      ".* = 1$newline"  "function static step post-change"
 198
 199 # Module static variable, forward
 200
 201 set breakloc [gdb_get_line_number \
 202                   "module_static_state: set breakpoint here" $srcfile]
 203
 204 gdb_test "tbreak $breakloc" ".*$srcfile, line $breakloc.*" ""
 205 gdb_test "continue"         ".*$srcfile:$breakloc.*" "forward to $breakloc"
 206
 207 gdb_test "print astatic" ".* = 0$newline"  "module static forward-breakpoint"
 208 gdb_test "reverse-step"  ".*hide.*" ""
 209 gdb_test "step"          ".*$newline$breakloc.*" ""
 210 gdb_test "print astatic" ".* = 0$newline"  "module static forward step-to"
 211 gdb_test "step"          ".* module static post-change .*" ""
 212 gdb_test "print astatic" ".* = 1$newline"  "module static step post-change"
 213
 214 # Module global variable, forward
 215
 216 set breakloc [gdb_get_line_number \
 217                   "module_global_state: set breakpoint here" $srcfile]
 218
 219 gdb_test "tbreak $breakloc" ".*$srcfile, line $breakloc.*" ""
 220 gdb_test "continue"         ".*$srcfile:$breakloc.*" "forward to $breakloc"
 221
 222 gdb_test "print aglobal" ".* = 0$newline"  "module global forward-breakpoint"
 223 gdb_test "reverse-step"  ".*hide.*" ""
 224 gdb_test "step"          ".*$newline$breakloc.*" ""
 225 gdb_test "print aglobal" ".* = 0$newline"  "module global forward step-to"
 226 gdb_test "step"          ".* module global post-change .*" ""
 227 gdb_test "print aglobal" ".* = 1$newline"  "module global step post-change"
 228