gdb/testsuite/gdb.threads/forking-threads-plus-breakpoint.exp

   1 # Copyright (C) 2015-2016 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 verifies that several threads forking while another thread
  17 # is constantly stepping over a breakpoint is properly handled.
  18
  19 standard_testfile
  20
  21 set linenum [gdb_get_line_number "set break here"]
  22
  23 if {[build_executable "failed to prepare" $testfile $srcfile {debug pthreads}] == -1} {
  24     return -1
  25 }
  26
  27 # The test proper.  If COND_BP_TARGET is true, then test with
  28 # conditional breakpoints evaluated on the target side, if possible.
  29 # DETACH_ON_FORK is used as value for the "set detach-on-fork"
  30 # setting.  If "on", this exercises GDB explicitly continuing the fork
  31 # child until exit.  If "off", this exercises GDB detaching the fork
  32 # child.
  33 proc do_test { cond_bp_target detach_on_fork } {
  34     global GDBFLAGS
  35     global srcfile testfile binfile
  36     global decimal gdb_prompt
  37     global linenum
  38     global is_remote_target
  39
  40     set saved_gdbflags $GDBFLAGS
  41     set GDBFLAGS [concat $GDBFLAGS " -ex \"set non-stop on\""]
  42     clean_restart $binfile
  43     set GDBFLAGS $saved_gdbflags
  44
  45     if ![runto_main] then {
  46         fail "Can't run to main"
  47         return 0
  48     }
  49
  50     gdb_test_no_output "set detach-on-fork $detach_on_fork"
  51
  52     gdb_test "break $linenum if zero == 1" \
  53         "Breakpoint .*" \
  54         "set breakpoint that evals false"
  55
  56     set test "continue &"
  57     gdb_test_multiple $test $test {
  58         -re "$gdb_prompt " {
  59             pass $test
  60         }
  61     }
  62
  63     set fork_count 0
  64     set ok 0
  65
  66     set test "inferior 1 exited"
  67     gdb_test_multiple "" $test {
  68         -re "Inferior 1 \(\[^\r\n\]+\) exited normally" {
  69             set ok 1
  70             pass $test
  71         }
  72         -re "Inferior $decimal \(\[^\r\n\]+\) exited normally" {
  73             incr fork_count
  74             if {$fork_count <= 100} {
  75                 exp_continue
  76             } else {
  77                 fail "$test (too many forks)"
  78             }
  79         }
  80     }
  81
  82     if {!$ok} {
  83         # No use testing further.
  84         return
  85     }
  86
  87     gdb_test "info threads" "No threads\." \
  88         "no threads left"
  89
  90     gdb_test "info inferiors" \
  91         "Num\[ \t\]+Description\[ \t\]+Executable\[ \t\]+\r\n\\* 1 \[^\r\n\]+" \
  92         "only inferior 1 left"
  93 }
  94
  95 foreach_with_prefix cond_bp_target {1 0} {
  96     foreach_with_prefix detach_on_fork {"on" "off"} {
  97         do_test $cond_bp_target $detach_on_fork
  98
  99         # Disable "off" for now.  The test does pass with
 100         # detach-on-fork off (at the time of writing), but gdb seems
 101         # to slow down quadratically as inferiors are created, and
 102         # then the test takes annoyingly long to complete...
 103         break
 104     }
 105 }