gdb/testsuite/gdb.arch/aarch64-brk-patterns.exp

   1 # Copyright 2020-2022 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 # This file is part of the gdb testsuite.
  17
  18 # Test if GDB stops at various BRK instruction patterns inserted into
  19 # the code.
  20
  21 if {![is_aarch64_target]} {
  22     verbose "Skipping ${gdb_test_file_name}."
  23     return
  24 }
  25
  26 standard_testfile
  27 if {[prepare_for_testing "failed to prepare" ${testfile} ${srcfile}]} {
  28     return -1
  29 }
  30
  31 if {![runto_main]} {
  32     untested "could not run to main"
  33     return -1
  34 }
  35
  36 # Number of expected SIGTRAP's to get.  This needs to be kept in sync
  37 # with the source file.
  38 set expected_traps 3
  39 set keep_going 1
  40 set count 0
  41
  42 # Make sure we have a lower timeout in case GDB doesn't support a particular
  43 # instruction.  Such instruction will cause GDB to loop infinitely.
  44 while {$keep_going} {
  45     # Continue to next program breakpoint instruction.
  46     gdb_test_multiple "continue" "brk instruction $count causes SIGTRAP" {
  47         -re "Program received signal SIGTRAP, Trace/breakpoint trap.*$gdb_prompt $" {
  48             pass $gdb_test_name
  49
  50             # Insert a breakpoint at the program breakpoint instruction so
  51             # GDB can step over it.
  52             gdb_test "break" \
  53                 "Breakpoint $decimal at $hex: file .*$srcfile, line $decimal.*" \
  54                 "insert breakpoint at brk instruction $count"
  55             incr count
  56         }
  57         # We've reached the end of the test.
  58         -re "exited normally.*$gdb_prompt $" {
  59             set keep_going 0
  60         }
  61         timeout {
  62             fail $gdb_test_name
  63             set keep_going 0
  64         }
  65     }
  66 }
  67
  68 # Verify we stopped at the expected number of SIGTRAP's.
  69 gdb_assert {$count == $expected_traps} "all brk instructions triggered"