gdb/testsuite/gdb.threads/hand-call-in-threads.exp

   1 # Copyright (C) 2004, 2007, 2008, 2010 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 # Test making hand function calls in multiple threads.
  17
  18 set NR_THREADS 4
  19
  20 if $tracelevel then {
  21         strace $tracelevel
  22 }
  23
  24 set testfile "hand-call-in-threads"
  25 set srcfile ${testfile}.c
  26 set binfile ${objdir}/${subdir}/${testfile}
  27
  28 if {[gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable [list debug "incdir=${objdir}" "additional_flags=-DNR_THREADS=$NR_THREADS"]] != "" } {
  29     return -1
  30 }
  31
  32 # Some targets can't do function calls, so don't even bother with this
  33 # test.
  34 if [target_info exists gdb,cannot_call_functions] {
  35     setup_xfail "*-*-*" 2416
  36     fail "This target can not call functions"
  37     continue
  38 }
  39
  40 proc get_dummy_frame_number { } {
  41     global gdb_prompt
  42
  43     gdb_test_multiple "bt" "" {
  44         -re "#(\[0-9\]*) *<function called from gdb>.*$gdb_prompt $" {
  45             return $expect_out(1,string)
  46         }
  47         -re "$gdb_prompt $" {
  48             return ""
  49         }
  50         timeout {
  51             return ""
  52         }
  53     }
  54     return ""
  55 }
  56
  57 gdb_exit
  58 gdb_start
  59 gdb_reinitialize_dir $srcdir/$subdir
  60 gdb_load ${binfile}
  61
  62 if { ![runto_main] } {
  63     fail "Can't run to main"
  64     return 0
  65 }
  66
  67 gdb_test "break all_threads_running" \
  68          "Breakpoint 2 at .*: file .*${srcfile}, line .*" \
  69          "breakpoint on all_threads_running"
  70
  71 gdb_test "break hand_call" \
  72          "Breakpoint 3 at .*: file .*${srcfile}, line .*" \
  73          "breakpoint on hand_call"
  74
  75 # Run the program and make sure GDB reports that we stopped after
  76 # hitting breakpoint 2 in all_threads_running().
  77
  78 gdb_test "continue" \
  79          ".*Breakpoint 2, all_threads_running ().*" \
  80          "run to all_threads_running"
  81
  82 # Before we start making hand function calls, turn on scheduler locking.
  83
  84 gdb_test_no_output "set scheduler-locking on" "enable scheduler locking"
  85 gdb_test "show scheduler-locking" ".* locking scheduler .* is \"on\"." "show scheduler locking on"
  86
  87 # Now hand-call a function in each thread, having the function
  88 # stop without returning.
  89
  90 # Add one for the main thread.
  91 set total_nr_threads [expr $NR_THREADS + 1]
  92
  93 # Thread numbering in gdb is origin-1, so begin numbering at 1.
  94 for { set i 1 } { $i <= $total_nr_threads } { incr i } {
  95     set thread_nr $i
  96     gdb_test "thread $thread_nr" ".*" \
  97         "prepare to make hand call, thread $thread_nr"
  98     gdb_test "call hand_call()" "Breakpoint 3, .*" \
  99         "hand call, thread $thread_nr"
 100 }
 101
 102 # Now have each hand-called function return.
 103
 104 # Turn confirmation off for the "return" command.
 105 gdb_test_no_output "set confirm off"
 106
 107 clear_xfail "*-*-*"
 108
 109 for { set i 1 } { $i <= $total_nr_threads } { incr i } {
 110     set thread_nr $i
 111     gdb_test "thread $thread_nr" ".*" \
 112         "prepare to discard hand call, thread $thread_nr"
 113     set frame_number [get_dummy_frame_number]
 114     if { "$frame_number" == "" } {
 115         fail "dummy stack frame number, thread $thread_nr"
 116         # Need something.
 117         set frame_number 0
 118     } else {
 119         pass "dummy stack frame number, thread $thread_nr"
 120     }
 121     # Pop the dummy frame.
 122     gdb_test "frame $frame_number" ".*" "setting frame, thread $thread_nr"
 123     gdb_test "return" ".*" "discard hand call, thread $thread_nr"
 124     # In case getting the dummy frame number failed, re-enable for next iter.
 125     clear_xfail "*-*-*"
 126 }
 127
 128 # Make sure all dummy frames got popped.
 129
 130 gdb_test_multiple "maint print dummy-frames" "all dummies popped" {
 131     -re ".*stack=.*$gdb_prompt $" {
 132         fail "all dummies popped"
 133     }
 134     -re ".*$gdb_prompt $" {
 135         pass "all dummies popped"
 136     }
 137 }
 138
 139 # Before we resume the full program, turn off scheduler locking.
 140 gdb_test_no_output "set scheduler-locking off" "disable scheduler locking"
 141 gdb_test "show scheduler-locking" ".* locking scheduler .* is \"off\"." "show scheduler locking off"
 142
 143 # Continue one last time, the program should exit normally.
 144 #
 145 # ??? This currently doesn't work because gdb doesn't know how to singlestep
 146 # over reported breakpoints that weren't in the last thread to run.
 147 # Commented out until then.
 148 #
 149 # For reference sake ...
 150 # An alternative is to manually work around the issue by manually setting
 151 # the thread back to the first thread: the program is still at the
 152 # all_threads_running breakpoint, which wasn't the last thread to run,
 153 # and gdb doesn't know how to singlestep over reported breakpoints that
 154 # weren't in the last thread to run.
 155 #gdb_test "thread 1" ".*" "set thread to 1, prepare to resume"
 156 #
 157 #gdb_continue_to_end "hand-call-in-threads"
 158
 159 return 0