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618f726f | 1 | # Copyright 2005-2016 Free Software Foundation, Inc. |
099ac3dd MS |
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 | |
e22f8b7c | 5 | # the Free Software Foundation; either version 3 of the License, or |
099ac3dd | 6 | # (at your option) any later version. |
e22f8b7c | 7 | # |
099ac3dd MS |
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. | |
e22f8b7c | 12 | # |
099ac3dd | 13 | # You should have received a copy of the GNU General Public License |
e22f8b7c | 14 | # along with this program. If not, see <http://www.gnu.org/licenses/>. |
099ac3dd | 15 | |
099ac3dd MS |
16 | # Until "set follow-fork-mode" and "catch fork" are implemented on |
17 | # other targets... | |
18 | # | |
3ca22649 | 19 | if { ![istarget "*-*-linux*"] } then { |
099ac3dd MS |
20 | continue |
21 | } | |
22 | ||
099ac3dd | 23 | |
f8b41b00 | 24 | standard_testfile .c |
099ac3dd MS |
25 | |
26 | if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } { | |
b60f0898 JB |
27 | untested multi-forks.exp |
28 | return -1 | |
099ac3dd MS |
29 | } |
30 | ||
31 | # Start with a fresh gdb | |
32 | ||
f8b41b00 | 33 | clean_restart ${binfile} |
099ac3dd MS |
34 | |
35 | global gdb_prompt | |
36 | ||
37 | # This is a test of gdb's ability to follow the parent, child or both | |
38 | # parent and child of multiple Unix fork() system calls. | |
cb4dce93 JK |
39 | |
40 | set exit_bp_loc [gdb_get_line_number "Set exit breakpoint here."] | |
41 | ||
42 | # Insert a breakpoint at the location provided by the exit_bp_loc global | |
43 | # and resume the execution until hitting that breakpoint. We also make | |
44 | # sure to consume all the expected output from all processes as well, | |
45 | # to make sure it doesn't cause trouble during a subsequent test. | |
46 | ||
47 | proc continue_to_exit_bp_loc {} { | |
48 | global exit_bp_loc decimal gdb_prompt | |
1eef6428 | 49 | global inferior_spawn_id gdb_spawn_id |
cb4dce93 JK |
50 | |
51 | gdb_breakpoint $exit_bp_loc | |
52 | ||
53 | send_gdb "continue\n" | |
54 | ||
55 | # The output from the child processes can be interleaved arbitrarily | |
56 | # with the output from GDB and the parent process. If we don't | |
57 | # consume it all now, it can confuse later interactions. | |
58 | set seen_done 0 | |
59 | set seen_break 0 | |
60 | set seen_prompt 0 | |
61 | set seen_timeout 0 | |
62 | while { ($seen_done < 16 || ! $seen_prompt) && ! $seen_timeout } { | |
63 | # We don't know what order the interesting things will arrive in. | |
64 | # Using a pattern of the form 'x|y|z' instead of -re x ... -re y | |
65 | # ... -re z ensures that expect always chooses the match that | |
66 | # occurs leftmost in the input, and not the pattern appearing | |
67 | # first in the script that occurs anywhere in the input, so that | |
68 | # we don't skip anything. | |
69 | gdb_expect { | |
1eef6428 | 70 | -i "$inferior_spawn_id $gdb_spawn_id" |
cb4dce93 JK |
71 | -re "($decimal done)|(Breakpoint)|($gdb_prompt)" { |
72 | if {[info exists expect_out(1,string)]} { | |
73 | incr seen_done | |
74 | } elseif {[info exists expect_out(2,string)]} { | |
75 | set seen_break 1 | |
76 | } elseif {[info exists expect_out(3,string)]} { | |
77 | set seen_prompt 1 | |
78 | } | |
79 | array unset expect_out | |
80 | } | |
81 | timeout { set seen_timeout 1 } | |
82 | } | |
83 | } | |
84 | ||
85 | if { $seen_timeout } { | |
86 | fail "run to exit 2 (timeout)" | |
87 | } elseif { ! $seen_prompt } { | |
88 | fail "run to exit 2 (no prompt)" | |
89 | } elseif { ! $seen_break } { | |
90 | fail "run to exit 2 (no breakpoint hit)" | |
91 | } elseif { $seen_done != 16 } { | |
92 | fail "run to exit 2 (missing done messages)" | |
93 | } else { | |
94 | pass "run to exit 2" | |
95 | } | |
96 | } | |
099ac3dd | 97 | |
aad9a193 JB |
98 | # The inferior program builds a tree of processes by executing a loop |
99 | # four times, calling fork at each iteration. Thus, at each | |
100 | # iteration, the total number of processes doubles; after four | |
101 | # iterations, we have 16 processes. Each process saves the results | |
102 | # from its 'fork' calls, so we can tell which leaf a given process is | |
103 | # by looking at which forks returned zero and which returned a pid: a | |
104 | # zero means to take the child's branch; a pid means to take the | |
105 | # parent's branch. | |
099ac3dd MS |
106 | |
107 | # First set gdb to follow the child. | |
108 | # The result should be that each of the 4 forks returns zero. | |
109 | ||
a8f077dc | 110 | clean_restart ${binfile} |
099ac3dd | 111 | runto_main |
27d3a1a2 | 112 | gdb_test_no_output "set follow-fork child" |
cb4dce93 | 113 | continue_to_exit_bp_loc |
099ac3dd MS |
114 | |
115 | gdb_test "print pids" "\\$.* = \\{0, 0, 0, 0\\}.*" "follow child, print pids" | |
116 | ||
117 | # Now set gdb to follow the parent. | |
118 | # Result should be that none of the 4 forks returns zero. | |
119 | ||
a8f077dc | 120 | clean_restart ${binfile} |
099ac3dd | 121 | runto_main |
35ec993f | 122 | gdb_test_no_output "set follow-fork parent" "" |
cb4dce93 | 123 | continue_to_exit_bp_loc |
099ac3dd MS |
124 | |
125 | gdb_test "print pids\[0\]==0 || pids\[1\]==0 || pids\[2\]==0 || pids\[3\]==0" \ | |
126 | " = 0" "follow parent, print pids" | |
127 | ||
128 | # | |
129 | # Now test with detach-on-fork off. | |
130 | # | |
131 | ||
2277426b PA |
132 | # Start with a fresh gdb |
133 | ||
f8b41b00 | 134 | clean_restart ${binfile} |
2277426b | 135 | |
099ac3dd | 136 | runto_main |
cb4dce93 | 137 | gdb_breakpoint $exit_bp_loc |
099ac3dd MS |
138 | |
139 | gdb_test "help set detach-on-fork" "whether gdb will detach the child.*" \ | |
140 | "help set detach" | |
141 | ||
142 | gdb_test "show detach-on-fork" "on." "show detach default on" | |
143 | ||
27d3a1a2 | 144 | gdb_test_no_output "set detach off" "set detach off" |
099ac3dd MS |
145 | |
146 | # | |
147 | # We will now run every fork up to the exit bp, | |
2277426b | 148 | # eventually winding up with 16 inferiors. |
099ac3dd MS |
149 | # |
150 | ||
9078e690 DJ |
151 | for {set i 1} {$i <= 15} {incr i} { |
152 | gdb_test "continue" "Breakpoint .* main .*exit.*" "Run to exit $i" | |
b05b1202 | 153 | gdb_test "info inferior" " 2 .* 3 .* 4 .* 5 .*" "info inferior $i" |
2277426b PA |
154 | gdb_test "inferior $i + 1" "(_dl_sysinfo_int80|fork|__kernel_(v|)syscall).*" \ |
155 | "inferior $i" | |
9078e690 | 156 | } |
099ac3dd MS |
157 | |
158 | gdb_test "continue" "Breakpoint .* main .*exit.*" "Run to exit 16" | |
b05b1202 | 159 | gdb_test "info inferior" " 2 .* 3 .* 4 .* 5 .*" "info inferior 16" |
2277426b | 160 | gdb_test "inferior 2" " main .*" "restart final" |
099ac3dd MS |
161 | |
162 | # | |
163 | # Now we should examine all the pids. | |
164 | # | |
165 | ||
166 | # | |
2277426b | 167 | # Test detach inferior |
099ac3dd MS |
168 | # |
169 | ||
2277426b PA |
170 | # [assumes we're at #1] |
171 | gdb_test "detach inferior 2" "Detaching .*" "Detach 2" | |
172 | gdb_test "detach inferior 3" "Detaching .*" "Detach 3" | |
173 | gdb_test "detach inferior 4" "Detaching .*" "Detach 4" | |
174 | gdb_test "detach inferior 5" "Detaching .*" "Detach 5" | |
099ac3dd MS |
175 | |
176 | # | |
2277426b PA |
177 | # Test kill inferior |
178 | # | |
099ac3dd | 179 | |
b05b1202 PA |
180 | for {set i 6} { $i <= 16} {incr i} { |
181 | gdb_test_no_output "kill inferior $i" "Kill $i" | |
182 | gdb_test "info inferior $i" "<null>.*" "Did kill $i" | |
183 | } | |
099ac3dd MS |
184 | |
185 | return 0 |