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

   1 # Copyright 2014-2019 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 #
  17 # Regression test for a bug where GDB would internal error if a thread
  18 # runs into a breakpoint that needs stepping over, just after stepping
  19 # over another breakpoint, without a user visible stop in between.
  20 #
  21 standard_testfile
  22
  23 if {[prepare_for_testing "failed to prepare" $testfile $srcfile debug]} {
  24     return -1
  25 }
  26
  27 if ![runto_main] then {
  28     fail "can't run to main"
  29     return 0
  30 }
  31
  32 # Make sure the target doesn't hide the breakpoint hits (that don't
  33 # cause a user visible stop) from GDB.
  34 gdb_test_no_output "set breakpoint condition-evaluation host"
  35
  36 set up_to_nl "\[^\r\n\]+\[\r\n\]+"
  37
  38 # Number of consecutive breakpoints in a row to try.
  39 set n_insns 3
  40
  41 # Extract addresses of a few consecutive instructions.
  42 set test "get breakpoint addresses"
  43 if { [gdb_test_multiple "x /[expr $n_insns + 1]i \$pc" $test {
  44     -re "=> $hex${up_to_nl}   ($hex)${up_to_nl}   ($hex)${up_to_nl}   ($hex)${up_to_nl}$gdb_prompt $" {
  45         for {set i 1} {$i <= $n_insns} {incr i} {
  46             set bp_addrs($i) $expect_out($i,string)
  47         }
  48         pass $test
  49     }
  50 }] != 0 } {
  51     # No use proceeding if bp_addrs wasn't set.
  52     return
  53 }
  54
  55 for {set i 1} {$i <= $n_insns} {incr i} {
  56     with_test_prefix "insn $i" {
  57         gdb_test "break \*$bp_addrs($i)" \
  58             "Breakpoint $decimal at $bp_addrs($i): file .*" \
  59             "set breakpoint"
  60
  61         # Give the breakpoint a condition that always fails, so that
  62         # the thread is immediately re-resumed.
  63         gdb_test_no_output "condition \$bpnum condition" \
  64             "set condition"
  65     }
  66 }
  67
  68 set lineno [gdb_get_line_number "break here"]
  69 gdb_breakpoint $lineno
  70 gdb_continue_to_breakpoint "break here" ".*break here.*"