gdb/testsuite/gdb.threads/stop-with-handle.exp

   1 # Copyright 2019-2020 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 test covers a case where SIGSTOP has been configured to be
  17 # passed to the target with GDB's 'handle' command, and then a
  18 # multi-threaded inferior encounters an event that causes all threads
  19 # to be stopped.
  20 #
  21 # The problem that (used) to exist was that GDB would see the SIGSTOP,
  22 # but decide to ignore the signal based on the handle table.
  23
  24 standard_testfile
  25
  26 if {[prepare_for_testing "failed to prepare" \
  27          "${testfile}" "${srcfile}" {debug pthreads}]} {
  28     return -1
  29 }
  30
  31 if ![runto_main] then {
  32     fail "can't run to main"
  33     return 0
  34 }
  35
  36 # Have SIGSTOP sent to the inferior.
  37 gdb_test "handle SIGSTOP nostop noprint pass" \
  38     [multi_line \
  39          "Signal\[ \t\]+Stop\[ \t\]+Print\[ \t\]+Pass to program\[ \t\]+Description" \
  40          "SIGSTOP\[ \t\]+No\[ \t\]+No\[ \t\]+Yes\[ \t\]+Stopped \\(signal\\)"]
  41
  42 # Create a breakpoint, and when we hit it automatically finish the
  43 # current frame.
  44 gdb_breakpoint breakpt
  45
  46 # When the bug triggers this continue never completes.  GDB hits the
  47 # breakpoint in thread 1, and then tries to stop the second thread by
  48 # sending it SIGSTOP.  GDB sees the SIGSTOP arrive in thread 2 but
  49 # incorrect decides to pass the SIGSTOP to the thread rather than
  50 # bringing the thread to a stop.
  51 gdb_continue_to_breakpoint breakpt