1 # Copyright (C) 2004-2024 Free Software Foundation, Inc.
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.
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.
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/>.
16 # Test making hand function calls in multiple threads.
22 # Some targets can't do function calls, so don't even bother with this
24 require {!target_info exists gdb,cannot_call_functions}
26 if {[gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable [list debug "additional_flags=-DNR_THREADS=$NR_THREADS"]] != "" } {
30 proc get_dummy_frame_number { } {
33 gdb_test_multiple "bt" "" {
34 -re "#(\[0-9\]*) *<function called from gdb>.*$gdb_prompt $" {
35 return $expect_out(1,string)
47 clean_restart ${binfile}
49 if { ![runto_main] } {
53 gdb_test "break all_threads_running" \
54 "Breakpoint 2 at .*: file .*${srcfile}, line .*" \
55 "breakpoint on all_threads_running"
57 gdb_test "break hand_call" \
58 "Breakpoint 3 at .*: file .*${srcfile}, line .*" \
59 "breakpoint on hand_call"
61 # Run the program and make sure GDB reports that we stopped after
62 # hitting breakpoint 2 in all_threads_running().
65 ".*Breakpoint 2, all_threads_running ().*" \
66 "run to all_threads_running"
68 # Before we start making hand function calls, turn on scheduler locking.
70 gdb_test_no_output "set scheduler-locking on" "enable scheduler locking"
71 gdb_test "show scheduler-locking" ".* locking scheduler .* is \"on\"." "show scheduler locking on"
73 # Now hand-call a function in each thread, having the function
74 # stop without returning.
76 # Add one for the main thread.
77 set total_nr_threads [expr $NR_THREADS + 1]
79 # Thread numbering in gdb is origin-1, so begin numbering at 1.
80 for { set i 1 } { $i <= $total_nr_threads } { incr i } {
82 gdb_test "thread $thread_nr" \
83 ".*Switching to thread $thread_nr.*" \
84 "prepare to make hand call, thread $thread_nr"
85 gdb_test_multiple "call hand_call()" "" {
86 -re "Breakpoint 3, .*$gdb_prompt $" {
87 pass "hand call, thread $thread_nr"
90 fail "hand call, thread $thread_nr (got gdb prompt)"
93 # If the target fails to stop at the breakpoint, it just ends
94 # up in an infinite loop in hand_call(). If this happens
95 # and we have lost the GDB prompt, no further tests in
96 # this file will work and there is no point in continuing.
97 fail "hand call, thread $thread_nr (runaway target)"
103 # Now have each hand-called function return.
105 # Turn confirmation off for the "return" command.
106 gdb_test_no_output "set confirm off"
110 for { set i 1 } { $i <= $total_nr_threads } { incr i } {
112 gdb_test "thread $thread_nr" ".*" \
113 "prepare to discard hand call, thread $thread_nr"
114 set frame_number [get_dummy_frame_number]
115 if { "$frame_number" == "" } {
116 fail "dummy stack frame number, thread $thread_nr"
120 pass "dummy stack frame number, thread $thread_nr"
122 # Pop the dummy frame.
123 gdb_test "frame $frame_number" ".*" "setting frame, thread $thread_nr"
124 gdb_test "return" ".*" "discard hand call, thread $thread_nr"
125 # In case getting the dummy frame number failed, re-enable for next iter.
129 # Make sure all dummy frames got popped.
131 gdb_test_multiple "maint print dummy-frames" "all dummies popped" {
132 -re ".*stack=.*$gdb_prompt $" {
133 fail "all dummies popped"
135 -re ".*$gdb_prompt $" {
136 pass "all dummies popped"
140 # Before we resume the full program, turn off scheduler locking.
141 gdb_test_no_output "set scheduler-locking off" "disable scheduler locking"
142 gdb_test "show scheduler-locking" ".* locking scheduler .* is \"off\"." "show scheduler locking off"
144 # Continue one last time, the program should exit normally.
146 # ??? This currently doesn't work because gdb doesn't know how to singlestep
147 # over reported breakpoints that weren't in the last thread to run.
148 # Commented out until then.
150 # For reference sake ...
151 # An alternative is to manually work around the issue by manually setting
152 # the thread back to the first thread: the program is still at the
153 # all_threads_running breakpoint, which wasn't the last thread to run,
154 # and gdb doesn't know how to singlestep over reported breakpoints that
155 # weren't in the last thread to run.
156 #gdb_test "thread 1" ".*" "set thread to 1, prepare to resume"
158 #gdb_continue_to_end "hand-call-in-threads"