1 # Copyright 2005, 2006, 2007, 2008, 2009, 2010
2 # Free Software Foundation, Inc.
4 # This program is free software; you can redistribute it and/or modify
5 # it under the terms of the GNU General Public License as published by
6 # the Free Software Foundation; either version 3 of the License, or
7 # (at your option) any later version.
9 # This program is distributed in the hope that it will be useful,
10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 # GNU General Public License for more details.
14 # You should have received a copy of the GNU General Public License
15 # along with this program. If not, see <http://www.gnu.org/licenses/>.
21 if { [is_remote target] || ![isnative] } then {
25 # Until "set follow-fork-mode" and "catch fork" are implemented on
28 if {![istarget "hppa*-hp-hpux*"] && ![istarget "*-*-linux*"]} then {
35 set testfile "multi-forks"
36 set srcfile ${testfile}.c
37 set binfile ${objdir}/${subdir}/${testfile}
39 if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
40 untested multi-forks.exp
44 # Start with a fresh gdb
48 gdb_reinitialize_dir $srcdir/$subdir
53 # This is a test of gdb's ability to follow the parent, child or both
54 # parent and child of multiple Unix fork() system calls.
56 set exit_bp_loc [gdb_get_line_number "Set exit breakpoint here."]
58 # Insert a breakpoint at the location provided by the exit_bp_loc global
59 # and resume the execution until hitting that breakpoint. We also make
60 # sure to consume all the expected output from all processes as well,
61 # to make sure it doesn't cause trouble during a subsequent test.
63 proc continue_to_exit_bp_loc {} {
64 global exit_bp_loc decimal gdb_prompt
66 gdb_breakpoint $exit_bp_loc
70 # The output from the child processes can be interleaved arbitrarily
71 # with the output from GDB and the parent process. If we don't
72 # consume it all now, it can confuse later interactions.
77 while { ($seen_done < 16 || ! $seen_prompt) && ! $seen_timeout } {
78 # We don't know what order the interesting things will arrive in.
79 # Using a pattern of the form 'x|y|z' instead of -re x ... -re y
80 # ... -re z ensures that expect always chooses the match that
81 # occurs leftmost in the input, and not the pattern appearing
82 # first in the script that occurs anywhere in the input, so that
83 # we don't skip anything.
85 -re "($decimal done)|(Breakpoint)|($gdb_prompt)" {
86 if {[info exists expect_out(1,string)]} {
88 } elseif {[info exists expect_out(2,string)]} {
90 } elseif {[info exists expect_out(3,string)]} {
93 array unset expect_out
95 timeout { set seen_timeout 1 }
99 if { $seen_timeout } {
100 fail "run to exit 2 (timeout)"
101 } elseif { ! $seen_prompt } {
102 fail "run to exit 2 (no prompt)"
103 } elseif { ! $seen_break } {
104 fail "run to exit 2 (no breakpoint hit)"
105 } elseif { $seen_done != 16 } {
106 fail "run to exit 2 (missing done messages)"
112 # The inferior program builds a tree of processes by executing a loop
113 # four times, calling fork at each iteration. Thus, at each
114 # iteration, the total number of processes doubles; after four
115 # iterations, we have 16 processes. Each process saves the results
116 # from its 'fork' calls, so we can tell which leaf a given process is
117 # by looking at which forks returned zero and which returned a pid: a
118 # zero means to take the child's branch; a pid means to take the
121 # First set gdb to follow the child.
122 # The result should be that each of the 4 forks returns zero.
125 gdb_test "set follow-fork child"
126 continue_to_exit_bp_loc
128 gdb_test "print pids" "\\$.* = \\{0, 0, 0, 0\\}.*" "follow child, print pids"
130 # Now set gdb to follow the parent.
131 # Result should be that none of the 4 forks returns zero.
134 gdb_test "set follow-fork parent" "" ""
135 continue_to_exit_bp_loc
137 gdb_test "print pids\[0\]==0 || pids\[1\]==0 || pids\[2\]==0 || pids\[3\]==0" \
138 " = 0" "follow parent, print pids"
141 # Now test with detach-on-fork off.
144 # detach-on-fork isn't implemented on hpux.
146 if {![istarget "*-*-linux*"]} then {
150 # Start with a fresh gdb
154 gdb_reinitialize_dir $srcdir/$subdir
158 gdb_breakpoint $exit_bp_loc
160 gdb_test "help set detach-on-fork" "whether gdb will detach the child.*" \
163 gdb_test "show detach-on-fork" "on." "show detach default on"
165 gdb_test "set detach off" "" "set detach off"
168 # We will now run every fork up to the exit bp,
169 # eventually winding up with 16 inferiors.
172 for {set i 1} {$i <= 15} {incr i} {
173 gdb_test "continue" "Breakpoint .* main .*exit.*" "Run to exit $i"
174 gdb_test "info inferior" " 5 .* 4 .* 3 .* 2 .*" "info inferior $i"
175 gdb_test "inferior $i + 1" "(_dl_sysinfo_int80|fork|__kernel_(v|)syscall).*" \
179 gdb_test "continue" "Breakpoint .* main .*exit.*" "Run to exit 16"
180 gdb_test "info inferiors" " 5 .* 4 .* 3 .* 2 .*" "info inferior 16"
181 gdb_test "inferior 2" " main .*" "restart final"
184 # Now we should examine all the pids.
188 # Test detach inferior
191 # [assumes we're at #1]
192 gdb_test "detach inferior 2" "Detaching .*" "Detach 2"
193 gdb_test "detach inferior 3" "Detaching .*" "Detach 3"
194 gdb_test "detach inferior 4" "Detaching .*" "Detach 4"
195 gdb_test "detach inferior 5" "Detaching .*" "Detach 5"
201 gdb_test "kill inferior 6" "" "Kill 6"
202 gdb_test "info inferior 6" "<null>.*" "Did kill 6"
203 gdb_test "kill inferior 7" "" "Kill 7"
204 gdb_test "info inferior 7" "<null>.*" "Did kill 7"
205 gdb_test "kill inferior 8" "" "Kill 8"
206 gdb_test "info inferior 8" "<null>.*" "Did kill 8"
207 gdb_test "kill inferior 9" "" "Kill 9"
208 gdb_test "info inferior 9" "<null>.*" "Did kill 9"
209 gdb_test "kill inferior 10" "" "Kill 10"
210 gdb_test "info inferior 10" "<null>.*" "Did kill 10"
211 gdb_test "kill inferior 11" "" "Kill 11"
212 gdb_test "info inferior 11" "<null>.*" "Did kill 11"
213 gdb_test "kill inferior 12" "" "Kill 12"
214 gdb_test "info inferior 12" "<null>.*" "Did kill 12"
215 gdb_test "kill inferior 13" "" "Kill 13"
216 gdb_test "info inferior 13" "<null>.*" "Did kill 13"
217 gdb_test "kill inferior 14" "" "Kill 14"
218 gdb_test "info inferior 14" "<null>.*" "Did kill 14"
219 gdb_test "kill inferior 15" "" "Kill 15"
220 gdb_test "info inferior 15" "<null>.*" "Did kill 15"
221 gdb_test "kill inferior 16" "" "Kill 16"
222 gdb_test "info inferior 16" "<null>.*" "Did kill 16"