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

   1 # Copyright (C) 2004-2015 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 standard_testfile
  21
  22 if {[gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable [list debug "additional_flags=-DNR_THREADS=$NR_THREADS"]] != "" } {
  23     return -1
  24 }
  25
  26 # Some targets can't do function calls, so don't even bother with this
  27 # test.
  28 if [target_info exists gdb,cannot_call_functions] {
  29     setup_xfail "*-*-*" 2416
  30     fail "This target can not call functions"
  31     continue
  32 }
  33
  34 proc get_dummy_frame_number { } {
  35     global gdb_prompt
  36
  37     gdb_test_multiple "bt" "" {
  38         -re "#(\[0-9\]*) *<function called from gdb>.*$gdb_prompt $" {
  39             return $expect_out(1,string)
  40         }
  41         -re "$gdb_prompt $" {
  42             return ""
  43         }
  44         timeout {
  45             return ""
  46         }
  47     }
  48     return ""
  49 }
  50
  51 clean_restart ${binfile}
  52
  53 if { ![runto_main] } {
  54     fail "Can't run to main"
  55     return 0
  56 }
  57
  58 gdb_test "break all_threads_running" \
  59          "Breakpoint 2 at .*: file .*${srcfile}, line .*" \
  60          "breakpoint on all_threads_running"
  61
  62 gdb_test "break hand_call" \
  63          "Breakpoint 3 at .*: file .*${srcfile}, line .*" \
  64          "breakpoint on hand_call"
  65
  66 # Run the program and make sure GDB reports that we stopped after
  67 # hitting breakpoint 2 in all_threads_running().
  68
  69 gdb_test "continue" \
  70          ".*Breakpoint 2, all_threads_running ().*" \
  71          "run to all_threads_running"
  72
  73 # Before we start making hand function calls, turn on scheduler locking.
  74
  75 gdb_test_no_output "set scheduler-locking on" "enable scheduler locking"
  76 gdb_test "show scheduler-locking" ".* locking scheduler .* is \"on\"." "show scheduler locking on"
  77
  78 # Now hand-call a function in each thread, having the function
  79 # stop without returning.
  80
  81 # Add one for the main thread.
  82 set total_nr_threads [expr $NR_THREADS + 1]
  83
  84 # Thread numbering in gdb is origin-1, so begin numbering at 1.
  85 for { set i 1 } { $i <= $total_nr_threads } { incr i } {
  86     set thread_nr $i
  87     gdb_test "thread $thread_nr" ".*" \
  88         "prepare to make hand call, thread $thread_nr"
  89     gdb_test "call hand_call()" "Breakpoint 3, .*" \
  90         "hand call, thread $thread_nr"
  91 }
  92
  93 # Now have each hand-called function return.
  94
  95 # Turn confirmation off for the "return" command.
  96 gdb_test_no_output "set confirm off"
  97
  98 clear_xfail "*-*-*"
  99
 100 for { set i 1 } { $i <= $total_nr_threads } { incr i } {
 101     set thread_nr $i
 102     gdb_test "thread $thread_nr" ".*" \
 103         "prepare to discard hand call, thread $thread_nr"
 104     set frame_number [get_dummy_frame_number]
 105     if { "$frame_number" == "" } {
 106         fail "dummy stack frame number, thread $thread_nr"
 107         # Need something.
 108         set frame_number 0
 109     } else {
 110         pass "dummy stack frame number, thread $thread_nr"
 111     }
 112     # Pop the dummy frame.
 113     gdb_test "frame $frame_number" ".*" "setting frame, thread $thread_nr"
 114     gdb_test "return" ".*" "discard hand call, thread $thread_nr"
 115     # In case getting the dummy frame number failed, re-enable for next iter.
 116     clear_xfail "*-*-*"
 117 }
 118
 119 # Make sure all dummy frames got popped.
 120
 121 gdb_test_multiple "maint print dummy-frames" "all dummies popped" {
 122     -re ".*stack=.*$gdb_prompt $" {
 123         fail "all dummies popped"
 124     }
 125     -re ".*$gdb_prompt $" {
 126         pass "all dummies popped"
 127     }
 128 }
 129
 130 # Before we resume the full program, turn off scheduler locking.
 131 gdb_test_no_output "set scheduler-locking off" "disable scheduler locking"
 132 gdb_test "show scheduler-locking" ".* locking scheduler .* is \"off\"." "show scheduler locking off"
 133
 134 # Continue one last time, the program should exit normally.
 135 #
 136 # ??? This currently doesn't work because gdb doesn't know how to singlestep
 137 # over reported breakpoints that weren't in the last thread to run.
 138 # Commented out until then.
 139 #
 140 # For reference sake ...
 141 # An alternative is to manually work around the issue by manually setting
 142 # the thread back to the first thread: the program is still at the
 143 # all_threads_running breakpoint, which wasn't the last thread to run,
 144 # and gdb doesn't know how to singlestep over reported breakpoints that
 145 # weren't in the last thread to run.
 146 #gdb_test "thread 1" ".*" "set thread to 1, prepare to resume"
 147 #
 148 #gdb_continue_to_end "hand-call-in-threads"
 149
 150 return 0