1# Copyright (C) 2004, 2007, 2008, 2010, 2011 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
20if $tracelevel then {
21	strace $tracelevel
22}
23
24set testfile "hand-call-in-threads"
25set srcfile ${testfile}.c
26set binfile ${objdir}/${subdir}/${testfile}
27
28if {[gdb_compile_pthreads "${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.
34if [target_info exists gdb,cannot_call_functions] {
35    setup_xfail "*-*-*" 2416
36    fail "This target can not call functions"
37    continue
38}
39
40proc 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
57gdb_exit
58gdb_start
59gdb_reinitialize_dir $srcdir/$subdir
60gdb_load ${binfile}
61
62if { ![runto_main] } {
63    fail "Can't run to main"
64    return 0
65}
66
67gdb_test "break all_threads_running" \
68         "Breakpoint 2 at .*: file .*${srcfile}, line .*" \
69         "breakpoint on all_threads_running"
70
71gdb_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
78gdb_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
84gdb_test_no_output "set scheduler-locking on" "enable scheduler locking"
85gdb_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.
91set total_nr_threads [expr $NR_THREADS + 1]
92
93# Thread numbering in gdb is origin-1, so begin numbering at 1.
94for { 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.
105gdb_test_no_output "set confirm off"
106
107clear_xfail "*-*-*"
108
109for { 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 $thread_nr"
124    # In case getting the dummy frame number failed, re-enable for next iter.
125    clear_xfail "*-*-*"
126}
127
128# Make sure all dummy frames got popped.
129
130gdb_test_multiple "maint print dummy-frames" "all dummies popped" {
131    -re ".*stack=.*$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.
140gdb_test_no_output "set scheduler-locking off" "disable scheduler locking"
141gdb_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
159return 0
160