gdb/testsuite/gdb.base/multi-forks.exp

   1 #   Copyright 2005, 2006, 2007 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 if $tracelevel then {
  17         strace $tracelevel
  18         }
  19
  20 if { [is_remote target] || ![isnative] } then {
  21     continue
  22 }
  23
  24 # Until "set follow-fork-mode" and "catch fork" are implemented on
  25 # other targets...
  26 #
  27 if {![istarget "hppa*-hp-hpux*"] && ![istarget "*-*-linux*"]} then {
  28     continue
  29 }
  30
  31 set prms_id 0
  32 set bug_id 0
  33
  34 set testfile "multi-forks"
  35 set srcfile ${testfile}.c
  36 set binfile ${objdir}/${subdir}/${testfile}
  37
  38 if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
  39      untested multi-forks.exp
  40      return -1
  41 }
  42
  43 # Start with a fresh gdb
  44
  45 gdb_exit
  46 gdb_start
  47 gdb_reinitialize_dir $srcdir/$subdir
  48 gdb_load ${binfile}
  49
  50 global gdb_prompt
  51
  52 # This is a test of gdb's ability to follow the parent, child or both
  53 # parent and child of multiple Unix fork() system calls.
  54 #
  55
  56 # Inferior program calls fork 4 times.  Since each fork
  57 # calls fork 4 times, there will be 16 forks.  Each fork
  58 # saves the return values of its own 4 fork calls.
  59
  60 # First set gdb to follow the child.
  61 # The result should be that each of the 4 forks returns zero.
  62
  63 runto_main
  64 set exit_bp_loc [gdb_get_line_number "Set exit breakpoint here."]
  65 gdb_test "break $exit_bp_loc" "Breakpoint.* at .*" "Break at exit"
  66 gdb_test "set follow child" "" ""
  67
  68 send_gdb "continue\n"
  69 gdb_expect {
  70     -re ".*Break.* main .*$gdb_prompt.*$" {}
  71     -re ".*$gdb_prompt $" {fail "run to exit 1"}
  72     default {fail "run to exit 1 (timeout)"}
  73 }
  74
  75 gdb_test "print pids" "\\$.* = \\{0, 0, 0, 0\\}.*" "follow child, print pids"
  76
  77 # Now set gdb to follow the parent.
  78 # Result should be that none of the 4 forks returns zero.
  79
  80 delete_breakpoints
  81 runto_main
  82 gdb_test "break $exit_bp_loc" "Breakpoint.* at .*" "Break at exit"
  83 gdb_test "set follow parent" "" ""
  84
  85 send_gdb "continue\n"
  86 gdb_expect {
  87     -re ".*Break.* main .*$gdb_prompt.*$" {}
  88     -re ".*$gdb_prompt $" {fail "run to exit 2"}
  89     default {fail "run to exit 2 (timeout)"}
  90 }
  91
  92 gdb_test "print pids\[0\]==0 || pids\[1\]==0 || pids\[2\]==0 || pids\[3\]==0" \
  93     " = 0" "follow parent, print pids"
  94
  95 #
  96 # Now test with detach-on-fork off.
  97 #
  98
  99 runto_main
 100 gdb_test "break $exit_bp_loc" "Breakpoint.* at .*" ""
 101
 102 gdb_test "help set detach-on-fork" "whether gdb will detach the child.*" \
 103     "help set detach"
 104
 105 gdb_test "show detach-on-fork" "on." "show detach default on"
 106
 107 gdb_test "set detach off" "" "set detach off"
 108
 109 #
 110 # We will now run every fork up to the exit bp,
 111 # eventually winding up with 16 forks.
 112 #
 113
 114 for {set i 1} {$i <= 15} {incr i} {
 115   gdb_test "continue" "Breakpoint .* main .*exit.*" "Run to exit $i"
 116   gdb_test "info fork" " 4 .* 3 .* 2 .* 1 .*" "info fork $i"
 117   gdb_test "restart $i" "(_dl_sysinfo_int80|fork|__kernel_(v|)syscall).*" \
 118       "restart $i"
 119 }
 120
 121 gdb_test "continue" "Breakpoint .* main .*exit.*" "Run to exit 16"
 122 gdb_test "info fork" " 4 .* 3 .* 2 .* 1 .*" "info fork 16"
 123 gdb_test "restart 0" " main .*" "restart final"
 124
 125 #
 126 # Now we should examine all the pids.
 127 #
 128
 129 #
 130 # Test detach fork
 131 #
 132
 133 # [assumes we're at #0]
 134 gdb_test "detach fork 1" "Detached .*" "Detach 1"
 135 gdb_test "detach fork 2" "Detached .*" "Detach 2"
 136 gdb_test "detach fork 3" "Detached .*" "Detach 3"
 137 gdb_test "detach fork 4" "Detached .*" "Detach 4"
 138
 139 #
 140 # Test delete fork
 141 #
 142
 143 gdb_test "delete fork 5" "" "Delete 5"
 144 gdb_test "info fork 5"   "No fork number 5." "Did delete 5"
 145 gdb_test "delete fork 6" "" "Delete 6"
 146 gdb_test "info fork 6"   "No fork number 6." "Did delete 6"
 147 gdb_test "delete fork 7" "" "Delete 7"
 148 gdb_test "info fork 7"   "No fork number 7." "Did delete 7"
 149 gdb_test "delete fork 8" "" "Delete 8"
 150 gdb_test "info fork 8"   "No fork number 8." "Did delete 8"
 151 gdb_test "delete fork 9" "" "Delete 9"
 152 gdb_test "info fork 9"   "No fork number 9." "Did delete 9"
 153 gdb_test "delete fork 10" "" "Delete 10"
 154 gdb_test "info fork 10"   "No fork number 10." "Did delete 10"
 155 gdb_test "delete fork 11" "" "Delete 11"
 156 gdb_test "info fork 11"   "No fork number 11." "Did delete 11"
 157 gdb_test "delete fork 12" "" "Delete 12"
 158 gdb_test "info fork 12"   "No fork number 12." "Did delete 12"
 159 gdb_test "delete fork 13" "" "Delete 13"
 160 gdb_test "info fork 13"   "No fork number 13." "Did delete 13"
 161 gdb_test "delete fork 14" "" "Delete 14"
 162 gdb_test "info fork 14"   "No fork number 14." "Did delete 14"
 163 gdb_test "delete fork 15" "" "Delete 15"
 164 gdb_test "info fork 15"   "No fork number 15." "Did delete 15"
 165
 166 return 0
 167