gdb/testsuite/gdb.reverse/time-reverse.exp

   1 # Copyright 2015-2024 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
  18 #
  19 # This test tests time syscall for reverse execution.
  20 #
  21
  22 require supports_reverse
  23
  24 standard_testfile
  25
  26 # MODE is either "syscall" for testing the time syscall explicitly, or
  27 # "c" for testing the C time(2) function.
  28 proc test {mode} {
  29     set options {debug}
  30
  31     if {$mode == "syscall"} {
  32         lappend options additional_flags=-DUSE_SYSCALL
  33     } elseif {$mode != "c"} {
  34         error "unrecognized mode: $mode"
  35     }
  36
  37     if { [prepare_for_testing "failed to prepare" $::testfile-$mode $::srcfile $options] } {
  38         return
  39     }
  40
  41     runto_main
  42
  43     if [supports_process_record] {
  44         # Activate process record/replay
  45         gdb_test_no_output "record" "turn on process record"
  46     }
  47
  48     gdb_test "break marker2" \
  49         "Breakpoint $::decimal at $::hex: file .*$::srcfile, line $::decimal.*" \
  50         "set breakpoint at marker2"
  51
  52     gdb_continue_to_breakpoint "marker2" ".*$::srcfile:.*"
  53
  54     gdb_test "break marker1" \
  55         "Breakpoint $::decimal at $::hex: file .*$::srcfile, line $::decimal.*" \
  56         "set breakpoint at marker1"
  57
  58     gdb_test "reverse-continue" ".*$::srcfile:$::decimal.*" "reverse to marker1"
  59
  60     # If the variable was recorded properly, the old contents (-1)
  61     # will be remembered.  If not, new contents (current time) will be
  62     # used, and the test will fail.
  63
  64     gdb_test "print time_global" ".* = -1" "check time record"
  65 }
  66
  67 # Test both using the syscall explicitly, and using the time(2) C
  68 # function.
  69 #
  70 # The C variant ensures that if some platform uses some syscall we are
  71 # not aware of yet, we'll still exercise it (and likely fail).
  72 #
  73 # The explicit syscall variant is useful on platforms where the C
  74 # function does not call a syscall at all by default, e.g., on some
  75 # systems the C time function wraps an implementation provided by the
  76 # vDSO.
  77
  78 foreach_with_prefix mode {syscall c} {
  79     if {$mode == "syscall" && ![have_syscall time]} {
  80         continue
  81     }
  82
  83     test $mode
  84 }