gdb/testsuite/gdb.reverse/func-map-to-same-line.exp

   1 # Copyright 2023-2024 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.  It tests reverse stepping.
  17 # Lots of code borrowed from "step-test.exp".
  18
  19 # This test checks to make sure there is no regression failures for
  20 # the reverse-next command when stepping back over two functions in
  21 # the same line.
  22
  23 require supports_reverse
  24
  25 # This test uses the gcc no-column-info command which was added in gcc 7.1.
  26
  27 proc run_tests {} {
  28     global testfile
  29
  30     clean_restart ${testfile}
  31
  32     if { ![runto_main] } {
  33         return
  34     }
  35
  36     with_test_prefix "next-test" {
  37         gdb_test_no_output "record" "turn on process record"
  38
  39         # This regression test verifies the reverse-step and reverse-next
  40         # commands work properly when executing backwards thru a source line
  41         # containing two function calls on the same source line, i.e.
  42         # func1 (); func2 ();.  This test is compiled so the dwarf info
  43         # does not contain the line table information.
  44
  45         # Test 1, reverse-next command
  46         # Set breakpoint at the line after the function calls.
  47         set bp_start_reverse_test [gdb_get_line_number "START REVERSE TEST"]
  48
  49         gdb_breakpoint $bp_start_reverse_test temporary
  50
  51         # Continue to break point for reverse-next test.
  52         # Command definition:  reverse-next [count]
  53         #   Run backward to the beginning of the previous line executed in
  54         #   the current (innermost) stack frame.  If the line contains
  55         #   function calls, they will be “un-executed” without stopping.
  56         #   Starting from the first line of a function, reverse-next will
  57         #   take you back to the caller of that function, before the
  58         #   function was called, just as the normal next command would take
  59         #   you from the last line of a function back to its return to its
  60         #   caller 2.
  61
  62         gdb_continue_to_breakpoint \
  63         "stopped at command reverse-next test start location" \
  64         ".*$bp_start_reverse_test\r\n.*"
  65
  66         # The reverse-next should step all the way back to the beginning of
  67         # the line, i.e. at the beginning of the func1 call.
  68         gdb_test "reverse-next" ".*func1 \\(\\); func2 \\(\\);.*" \
  69             " reverse-next to line with two functions"
  70
  71         # We should be stopped at the first instruction of the line.  A
  72         # reverse-step should step back and stop at the beginning of the
  73         # previous line b = 2, i.e. not in func1 ().
  74         gdb_test "reverse-stepi" ".*b = 2;.*" \
  75             "reverse-stepi to previous line b = 2"
  76     }
  77
  78     # Setup for test 2
  79     clean_restart ${testfile}
  80
  81     if { ![runto_main] } {
  82         return
  83     }
  84
  85     with_test_prefix "step-test" {
  86         gdb_test_no_output "record" "turn on process record"
  87
  88         # Test 2, reverse-step command
  89         # Set breakpoint at the line after the function calls.
  90         gdb_breakpoint $bp_start_reverse_test temporary
  91
  92         # Continue to the start of the reverse-step test.
  93         # Command definition:  reverse-step [count]
  94         #   Run the program backward until control reaches the start of a
  95         #   different source line; then stop it, and return control to gdb.
  96         #   Like the step command, reverse-step will only stop at the
  97         #   beginning of a source line.  It “un-executes” the previously
  98         #   executed source line.  If the previous source line included calls
  99         #   to debuggable functions, reverse-step will step (backward) into
 100         #   the called function, stopping at the beginning of the last
 101         #   statement in the called function (typically a return statement).
 102         #   Also, as with the step command, if non-debuggable functions are
 103         #   called, reverse-step will run thru them backward without
 104         #   stopping.
 105
 106         gdb_continue_to_breakpoint \
 107             "stopped at command reverse-step test start location" \
 108             ".*$bp_start_reverse_test\r\n.*"
 109
 110         # The first reverse step should take us call of func2 ().
 111         gdb_test "reverse-step" ".*END FUNC2.*" \
 112             "reverse-step into func2 "
 113
 114         # The second reverse step should take us into func1 ().
 115         gdb_test "reverse-step" ".*END FUNC1.*" \
 116             "reverse-step into func1 "
 117
 118         # The third reverse step should take us call of func1 ().
 119         gdb_test "reverse-step" ".*func1 \\(\\); func2 \\(\\);.*" \
 120             "reverse-step to line func1(); func2(), at call for func1 "
 121         # We should be stopped at the first instruction of the line.  A
 122         # reversee stepi should take us to b = 2 ().
 123         gdb_test "reverse-stepi" ".*b = 2;.*" \
 124             "reverse-stepi to line b = 2 "
 125     }
 126 }
 127
 128 standard_testfile  .c
 129
 130 # test with and without gcc column info enabled
 131 foreach_with_prefix column_info_flag {column-info no-column-info} {
 132     set options [list debug $column_info_flag]
 133
 134     if {[prepare_for_testing "failed to prepare" ${testfile} ${srcfile} \
 135              $options]} {
 136         return -1
 137    }
 138
 139     run_tests
 140 }