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 18set NR_THREADS 4 19 20standard_testfile 21 22if {[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. 28if [target_info exists gdb,cannot_call_functions] { 29 setup_xfail "*-*-*" 2416 30 fail "This target can not call functions" 31 continue 32} 33 34proc 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 51clean_restart ${binfile} 52 53if { ![runto_main] } { 54 fail "Can't run to main" 55 return 0 56} 57 58gdb_test "break all_threads_running" \ 59 "Breakpoint 2 at .*: file .*${srcfile}, line .*" \ 60 "breakpoint on all_threads_running" 61 62gdb_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 69gdb_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 75gdb_test_no_output "set scheduler-locking on" "enable scheduler locking" 76gdb_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. 82set total_nr_threads [expr $NR_THREADS + 1] 83 84# Thread numbering in gdb is origin-1, so begin numbering at 1. 85for { 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. 96gdb_test_no_output "set confirm off" 97 98clear_xfail "*-*-*" 99 100for { 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 $thread_nr" 115 # In case getting the dummy frame number failed, re-enable for next iter. 116 clear_xfail "*-*-*" 117} 118 119# Make sure all dummy frames got popped. 120 121gdb_test_multiple "maint print dummy-frames" "all dummies popped" { 122 -re ".*stack=.*$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. 131gdb_test_no_output "set scheduler-locking off" "disable scheduler locking" 132gdb_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 150return 0 151