1#   Copyright 2005, 2006, 2007 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
16if $tracelevel then {
17	strace $tracelevel
18	}
19
20if { [is_remote target] || ![isnative] } then {
21    continue
22}
23
24# Until "set follow-fork-mode" and "catch fork" are implemented on
25# other targets...
26#
27if {![istarget "hppa*-hp-hpux*"] && ![istarget "*-*-linux*"]} then {
28    continue
29}
30
31set prms_id 0
32set bug_id 0
33
34set testfile "multi-forks"
35set srcfile ${testfile}.c
36set binfile ${objdir}/${subdir}/${testfile}
37
38if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
39     untested multi-forks.exp
40     return -1
41}
42
43# Start with a fresh gdb
44
45gdb_exit
46gdb_start
47gdb_reinitialize_dir $srcdir/$subdir
48gdb_load ${binfile}
49
50global gdb_prompt
51
52# This is a test of gdb's ability to follow the parent, child or both
53# parent and child of multiple Unix fork() system calls.
54#
55
56# Inferior program calls fork 4 times.  Since each fork
57# calls fork 4 times, there will be 16 forks.  Each fork
58# saves the return values of its own 4 fork calls.
59
60# First set gdb to follow the child.
61# The result should be that each of the 4 forks returns zero.
62
63runto_main
64set exit_bp_loc [gdb_get_line_number "Set exit breakpoint here."]
65gdb_test "break $exit_bp_loc" "Breakpoint.* at .*" "Break at exit"
66gdb_test "set follow child" "" ""
67
68send_gdb "continue\n"
69gdb_expect {
70    -re ".*Break.* main .*$gdb_prompt.*$" {}
71    -re ".*$gdb_prompt $" {fail "run to exit 1"}
72    default {fail "run to exit 1 (timeout)"}
73}
74
75gdb_test "print pids" "\\$.* = \\{0, 0, 0, 0\\}.*" "follow child, print pids"
76
77# Now set gdb to follow the parent.
78# Result should be that none of the 4 forks returns zero.
79
80delete_breakpoints
81runto_main
82gdb_test "break $exit_bp_loc" "Breakpoint.* at .*" "Break at exit"
83gdb_test "set follow parent" "" ""
84
85send_gdb "continue\n"
86gdb_expect {
87    -re ".*Break.* main .*$gdb_prompt.*$" {}
88    -re ".*$gdb_prompt $" {fail "run to exit 2"}
89    default {fail "run to exit 2 (timeout)"}
90}
91
92gdb_test "print pids\[0\]==0 || pids\[1\]==0 || pids\[2\]==0 || pids\[3\]==0" \
93    " = 0" "follow parent, print pids"
94
95#
96# Now test with detach-on-fork off.
97#
98
99runto_main
100gdb_test "break $exit_bp_loc" "Breakpoint.* at .*" ""
101
102gdb_test "help set detach-on-fork" "whether gdb will detach the child.*" \
103    "help set detach"
104
105gdb_test "show detach-on-fork" "on." "show detach default on"
106
107gdb_test "set detach off" "" "set detach off"
108
109#
110# We will now run every fork up to the exit bp,
111# eventually winding up with 16 forks.
112#
113
114for {set i 1} {$i <= 15} {incr i} {
115  gdb_test "continue" "Breakpoint .* main .*exit.*" "Run to exit $i"
116  gdb_test "info fork" " 4 .* 3 .* 2 .* 1 .*" "info fork $i"
117  gdb_test "restart $i" "(_dl_sysinfo_int80|fork|__kernel_(v|)syscall).*" \
118      "restart $i"
119}
120
121gdb_test "continue" "Breakpoint .* main .*exit.*" "Run to exit 16"
122gdb_test "info fork" " 4 .* 3 .* 2 .* 1 .*" "info fork 16"
123gdb_test "restart 0" " main .*" "restart final"
124
125#
126# Now we should examine all the pids.
127#
128
129#
130# Test detach fork
131#
132
133# [assumes we're at #0]
134gdb_test "detach fork 1" "Detached .*" "Detach 1"
135gdb_test "detach fork 2" "Detached .*" "Detach 2"
136gdb_test "detach fork 3" "Detached .*" "Detach 3"
137gdb_test "detach fork 4" "Detached .*" "Detach 4"
138
139#
140# Test delete fork
141#
142
143gdb_test "delete fork 5" "" "Delete 5"
144gdb_test "info fork 5"   "No fork number 5." "Did delete 5"
145gdb_test "delete fork 6" "" "Delete 6"
146gdb_test "info fork 6"   "No fork number 6." "Did delete 6"
147gdb_test "delete fork 7" "" "Delete 7"
148gdb_test "info fork 7"   "No fork number 7." "Did delete 7"
149gdb_test "delete fork 8" "" "Delete 8"
150gdb_test "info fork 8"   "No fork number 8." "Did delete 8"
151gdb_test "delete fork 9" "" "Delete 9"
152gdb_test "info fork 9"   "No fork number 9." "Did delete 9"
153gdb_test "delete fork 10" "" "Delete 10"
154gdb_test "info fork 10"   "No fork number 10." "Did delete 10"
155gdb_test "delete fork 11" "" "Delete 11"
156gdb_test "info fork 11"   "No fork number 11." "Did delete 11"
157gdb_test "delete fork 12" "" "Delete 12"
158gdb_test "info fork 12"   "No fork number 12." "Did delete 12"
159gdb_test "delete fork 13" "" "Delete 13"
160gdb_test "info fork 13"   "No fork number 13." "Did delete 13"
161gdb_test "delete fork 14" "" "Delete 14"
162gdb_test "info fork 14"   "No fork number 14." "Did delete 14"
163gdb_test "delete fork 15" "" "Delete 15"
164gdb_test "info fork 15"   "No fork number 15." "Did delete 15"
165
166return 0
167
168