gdb/testsuite/gdb.arch/ppc64-atomic-inst.exp

   1 # Copyright 2008-2020 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 single stepping through atomic sequences beginning with
  19 # a lwarx/ldarx instruction and ending with a stwcx/stdcx
  20 # instruction.
  21
  22
  23 if {![istarget "powerpc*"] || ![is_lp64_target]} {
  24     verbose "Skipping testing of powerpc64 single stepping over atomic sequences."
  25     return
  26 }
  27
  28 standard_testfile .S
  29
  30 if { [prepare_for_testing "failed to prepare" ${testfile} ${srcfile} {debug quiet}] } {
  31     return -1
  32 }
  33
  34 # The test proper.  DISPLACED is true if we should try with displaced
  35 # stepping.
  36 proc do_test { displaced } {
  37     global decimal hex
  38
  39     if ![runto_main] then {
  40         untested "could not run to main"
  41         return -1
  42     }
  43
  44     gdb_test_no_output "set displaced-stepping $displaced"
  45
  46     set bp1 [gdb_get_line_number "lwarx"]
  47     gdb_breakpoint "$bp1" "Breakpoint $decimal at $hex" \
  48         "set the breakpoint at the start of the lwarx/stwcx sequence"
  49
  50     set bp2 [gdb_get_line_number "ldarx"]
  51     gdb_breakpoint "$bp2" "Breakpoint $decimal at $hex" \
  52         "set the breakpoint at the start of the ldarx/stdcx sequence"
  53
  54     gdb_test continue "Continuing.*Breakpoint $decimal.*" \
  55         "continue until lwarx/stwcx start breakpoint"
  56
  57     gdb_test nexti "bne.*1b" \
  58         "step through the lwarx/stwcx sequence"
  59
  60     gdb_test continue "Continuing.*Breakpoint $decimal.*" \
  61         "continue until ldarx/stdcx start breakpoint"
  62
  63     gdb_test nexti "bne.*1b" \
  64         "step through the ldarx/stdcx sequence"
  65 }
  66
  67 foreach displaced { "off" "on" } {
  68     with_test_prefix "displaced=$displaced" {
  69         do_test $displaced
  70     }
  71 }