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         ".*Switching to thread $thread_nr.*" \
  89         "prepare to make hand call, thread $thread_nr"
  90     gdb_test_multiple "call hand_call()" "" {
  91         -re "Breakpoint 3, .*$gdb_prompt $" {
  92             pass "hand call, thread $thread_nr"
  93         }
  94         -re "$gdb_prompt $" {
  95             fail "hand call, thread $thread_nr (got gdb prompt)"
  96         }
  97         timeout {
  98             # If the target fails to stop at the breakpoint, it just ends
  99             # up in an infinite loop in hand_call().  If this happens
 100             # and we have lost the GDB prompt, no further tests in
 101             # this file will work and there is no point in continuing.
 102             fail "hand call, thread $thread_nr (runaway target)"
 103             return 0
 104         }
 105     }
 106 }
 107
 108 # Now have each hand-called function return.
 109
 110 # Turn confirmation off for the "return" command.
 111 gdb_test_no_output "set confirm off"
 112
 113 clear_xfail "*-*-*"
 114
 115 for { set i 1 } { $i <= $total_nr_threads } { incr i } {
 116     set thread_nr $i
 117     gdb_test "thread $thread_nr" ".*" \
 118         "prepare to discard hand call, thread $thread_nr"
 119     set frame_number [get_dummy_frame_number]
 120     if { "$frame_number" == "" } {
 121         fail "dummy stack frame number, thread $thread_nr"
 122         # Need something.
 123         set frame_number 0
 124     } else {
 125         pass "dummy stack frame number, thread $thread_nr"
 126     }
 127     # Pop the dummy frame.
 128     gdb_test "frame $frame_number" ".*" "setting frame, thread $thread_nr"
 129     gdb_test "return" ".*" "discard hand call, thread $thread_nr"
 130     # In case getting the dummy frame number failed, re-enable for next iter.
 131     clear_xfail "*-*-*"
 132 }
 133
 134 # Make sure all dummy frames got popped.
 135
 136 gdb_test_multiple "maint print dummy-frames" "all dummies popped" {
 137     -re ".*stack=.*$gdb_prompt $" {
 138         fail "all dummies popped"
 139     }
 140     -re ".*$gdb_prompt $" {
 141         pass "all dummies popped"
 142     }
 143 }
 144
 145 # Before we resume the full program, turn off scheduler locking.
 146 gdb_test_no_output "set scheduler-locking off" "disable scheduler locking"
 147 gdb_test "show scheduler-locking" ".* locking scheduler .* is \"off\"." "show scheduler locking off"
 148
 149 # Continue one last time, the program should exit normally.
 150 #
 151 # ??? This currently doesn't work because gdb doesn't know how to singlestep
 152 # over reported breakpoints that weren't in the last thread to run.
 153 # Commented out until then.
 154 #
 155 # For reference sake ...
 156 # An alternative is to manually work around the issue by manually setting
 157 # the thread back to the first thread: the program is still at the
 158 # all_threads_running breakpoint, which wasn't the last thread to run,
 159 # and gdb doesn't know how to singlestep over reported breakpoints that
 160 # weren't in the last thread to run.
 161 #gdb_test "thread 1" ".*" "set thread to 1, prepare to resume"
 162 #
 163 #gdb_continue_to_end "hand-call-in-threads"
 164
 165 return 0