gdb/testsuite/gdb.base/step-over-exit.exp

   1 #   Copyright 2016-2022 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 standard_testfile
  17
  18 # Test a thread is doing step-over a syscall instruction which is exit,
  19 # and GDBserver should cleanup its state of step-over properly.
  20
  21 set syscall_insn ""
  22
  23 # Define the syscall instruction for each target.
  24
  25 if { [istarget "i\[34567\]86-*-linux*"] || [istarget "x86_64-*-linux*"] } {
  26     set syscall_insn "\[ \t\](int|syscall|sysenter)\[ \t\]*"
  27 } elseif { [istarget "aarch64*-*-linux*"] || [istarget "arm*-*-linux*"] } {
  28     set syscall_insn "\[ \t\](swi|svc)\[ \t\]"
  29 } else {
  30     unsupported "unknown syscall instruction"
  31     return -1
  32 }
  33
  34 if {[prepare_for_testing "failed to prepare" $testfile $srcfile debug]} {
  35     return -1
  36 }
  37
  38 if ![runto_main] {
  39     return -1
  40 }
  41
  42 gdb_test "set follow-fork-mode child"
  43 gdb_test "set detach-on-fork off"
  44
  45 # Step 1, find the syscall instruction address.
  46
  47 gdb_test "break _exit" "Breakpoint $decimal at .*"
  48
  49 # Hit the breakpoint on _exit.  The address of syscall insn is recorded.
  50
  51 gdb_test "continue" \
  52     "Continuing\\..*Breakpoint $decimal.*_exit \\(.*\\).*" \
  53     "continue to exit"
  54
  55 gdb_test "display/i \$pc" ".*"
  56
  57 # Single step until we see a syscall insn or we reach the
  58 # upper bound of loop iterations.
  59 set msg "find syscall insn in exit"
  60 set steps 0
  61 set max_steps 1000
  62 gdb_test_multiple "stepi" $msg {
  63     -re ".*$syscall_insn.*$gdb_prompt $" {
  64         pass $msg
  65     }
  66     -re "x/i .*=>.*\r\n$gdb_prompt $" {
  67         incr steps
  68         if {$steps == $max_steps} {
  69             fail $msg
  70         } else {
  71             send_gdb "stepi\n"
  72             exp_continue
  73         }
  74     }
  75 }
  76
  77 if {$steps == $max_steps} {
  78     return
  79 }
  80
  81 # Remove the display
  82 gdb_test_no_output "delete display 1"
  83
  84 set syscall_insn_addr [get_hexadecimal_valueof "\$pc" "0"]
  85
  86 gdb_test "continue" "exited normally.*" "continue to end, first time"
  87 gdb_test "inferior 1" ".*Switching to inferior 1.*" \
  88     "switch back to inferior 1, first time"
  89
  90 delete_breakpoints
  91
  92 gdb_test "break marker"
  93
  94 gdb_test "continue" "Continuing\\..*Breakpoint $bkptno_num_re, .*" \
  95     "continue to marker, first time"
  96
  97 # Step 2, create a breakpoint which evaluates false, and force it
  98 # evaluated on the target side.
  99
 100 set test "set breakpoint condition-evaluation target"
 101 gdb_test_multiple $test $test {
 102     -re "warning: Target does not support breakpoint condition evaluation.\r\nUsing host evaluation mode instead.\r\n$gdb_prompt $" {
 103         # Target doesn't support breakpoint condition evaluation
 104         # on its side, but it is no harm to run the test.
 105     }
 106     -re "^$test\r\n$gdb_prompt $" {
 107     }
 108 }
 109
 110 gdb_test "break \*$syscall_insn_addr if main == 0" \
 111     "Breakpoint \[0-9\]* at .*" \
 112     "set conditional break at syscall address"
 113
 114 # Resume the child process, and the step-over is being done.
 115
 116 gdb_test "continue" "exited normally.*" "continue to end, second time"
 117 gdb_test "inferior 1" ".*Switching to inferior 1.*" \
 118     "switch back to inferior 1, second time"
 119
 120 # Switch back to the parent process, continue to the marker to
 121 # test GDBserver's state is still correct.
 122
 123 gdb_test "continue" "Continuing\\..*Breakpoint $bkptno_numopt_re, .*" \
 124     "continue to marker, second time"