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ecd75fc8 | 1 | # Copyright 1997-2014 Free Software Foundation, Inc. |
74cf1395 JM |
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 |
74cf1395 | 6 | # (at your option) any later version. |
e22f8b7c | 7 | # |
74cf1395 JM |
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 | # |
74cf1395 | 13 | # You should have received a copy of the GNU General Public License |
e85a822c | 14 | # along with this program. If not, see <http://www.gnu.org/licenses/>. |
74cf1395 | 15 | |
e85a822c | 16 | if { [is_remote target] || ![isnative] } then { |
5a2468f5 JM |
17 | continue |
18 | } | |
19 | ||
2d4e0376 YQ |
20 | # Until "set follow-fork-mode" and "catch fork" are implemented on |
21 | # other targets... | |
22 | # | |
23 | if {![istarget "hppa*-hp-hpux*"] && ![istarget "*-linux*"]} then { | |
24 | continue | |
25 | } | |
74cf1395 | 26 | |
289f9037 TT |
27 | standard_testfile |
28 | ||
29 | if {[prepare_for_testing $testfile.exp $testfile $srcfile debug]} { | |
30 | untested $testfile.exp | |
31 | return -1 | |
74cf1395 JM |
32 | } |
33 | ||
e85a822c DJ |
34 | proc check_fork_catchpoints {} { |
35 | global gdb_prompt | |
36 | ||
37 | # Verify that the system supports "catch fork". | |
38 | gdb_test "catch fork" "Catchpoint \[0-9\]* \\(fork\\)" "insert first fork catchpoint" | |
39 | set has_fork_catchpoints 0 | |
40 | gdb_test_multiple "continue" "continue to first fork catchpoint" { | |
77b06cd7 | 41 | -re ".*Your system does not support this type\r\nof catchpoint.*$gdb_prompt $" { |
e85a822c DJ |
42 | unsupported "continue to first fork catchpoint" |
43 | } | |
44 | -re ".*Catchpoint.*$gdb_prompt $" { | |
45 | set has_fork_catchpoints 1 | |
46 | pass "continue to first fork catchpoint" | |
47 | } | |
48 | } | |
49 | ||
50 | if {$has_fork_catchpoints == 0} { | |
51 | unsupported "fork catchpoints" | |
52 | return -code return | |
53 | } | |
54 | } | |
55 | ||
a1aa2221 LM |
56 | # Test follow-fork to ensure that the correct process is followed, that |
57 | # the followed process stops where it is expected to stop, that processes | |
58 | # are detached (or not) as expected, and that the inferior list has the | |
59 | # expected contents after following the fork. WHO is the argument to | |
60 | # the 'set follow-fork-mode' command, DETACH is the argument to the | |
61 | # 'set detach-on-fork' command, and CMD is the GDB command used to | |
62 | # execute the program past the fork. If the value of WHO or DETACH is | |
63 | # 'default', the corresponding GDB command is skipped for that test. | |
64 | # The value of CMD must be either 'next 2' or 'continue'. | |
65 | proc test_follow_fork { who detach cmd } { | |
a76e022a | 66 | global gdb_prompt |
a1aa2221 LM |
67 | global srcfile |
68 | global testfile | |
a76e022a | 69 | |
a1aa2221 | 70 | with_test_prefix "follow $who, detach $detach, command \"$cmd\"" { |
a76e022a | 71 | |
a1aa2221 LM |
72 | # Start a new debugger session each time so defaults are legitimate. |
73 | clean_restart $testfile | |
a76e022a | 74 | |
a1aa2221 LM |
75 | if ![runto_main] { |
76 | untested "could not run to main" | |
77 | return -1 | |
78 | } | |
74cf1395 | 79 | |
a1aa2221 LM |
80 | # The "Detaching..." and "Attaching..." messages may be hidden by |
81 | # default. | |
82 | gdb_test_no_output "set verbose" | |
a76e022a | 83 | |
a1aa2221 LM |
84 | # Set follow-fork-mode if we aren't using the default. |
85 | if {$who == "default"} { | |
86 | set who "parent" | |
87 | } else { | |
88 | gdb_test_no_output "set follow-fork $who" | |
89 | } | |
a76e022a | 90 | |
a1aa2221 LM |
91 | gdb_test "show follow-fork" \ |
92 | "Debugger response to a program call of fork or vfork is \"$who\"." \ | |
93 | "show follow-fork" | |
a76e022a | 94 | |
a1aa2221 LM |
95 | # Set detach-on-fork mode if we aren't using the default. |
96 | if {$detach == "default"} { | |
97 | set detach "on" | |
98 | } else { | |
99 | gdb_test_no_output "set detach-on-fork $detach" | |
100 | } | |
a76e022a | 101 | |
a1aa2221 LM |
102 | gdb_test "show detach-on-fork" \ |
103 | "Whether gdb will detach.* fork is $detach." \ | |
104 | "show detach-on-fork" | |
105 | ||
106 | # Set a breakpoint after the fork if we aren't single-stepping | |
107 | # past the fork. | |
108 | if {$cmd == "continue"} { | |
109 | set bp_after_fork [gdb_get_line_number "set breakpoint here"] | |
110 | gdb_test "break ${srcfile}:$bp_after_fork" \ | |
111 | "Breakpoint.*, line $bp_after_fork.*" \ | |
112 | "set breakpoint after fork" | |
113 | } | |
74cf1395 | 114 | |
a1aa2221 LM |
115 | # Set up the output we expect to see after we run. |
116 | set expected_re "" | |
117 | if {$who == "child"} { | |
118 | set expected_re "Attaching after.* fork to.*set breakpoint here.*" | |
119 | } elseif {$who == "parent" && $detach == "on"} { | |
120 | set expected_re "Detaching after fork from .*set breakpoint here.*" | |
121 | } else { | |
122 | set expected_re ".*set breakpoint here.*" | |
123 | } | |
a76e022a | 124 | |
a1aa2221 LM |
125 | # Test running past and following the fork, using the parameters |
126 | # set above. | |
127 | gdb_test $cmd $expected_re "$cmd past fork" | |
a76e022a | 128 | |
a1aa2221 LM |
129 | # Check that we have the inferiors arranged correctly after |
130 | # following the fork. | |
131 | set resume_unfollowed 0 | |
132 | if {$who == "parent" && $detach == "on"} { | |
a76e022a | 133 | |
a1aa2221 LM |
134 | # Follow parent / detach child: the only inferior is the parent. |
135 | gdb_test "info inferiors" "\\* 1 .* process.*" \ | |
136 | "info inferiors" | |
a76e022a | 137 | |
a1aa2221 LM |
138 | } elseif {$who == "parent" && $detach == "off"} { |
139 | ||
140 | # Follow parent / keep child: two inferiors under debug, the | |
141 | # parent is the current inferior. | |
142 | gdb_test "info inferiors" " 2 .*process.*\\* 1 .*process.*" \ | |
143 | "info inferiors" | |
144 | ||
145 | gdb_test "inferior 2" "Switching to inferior 2 .*" | |
146 | set resume_unfollowed 1 | |
147 | ||
148 | } elseif {$who == "child" && $detach == "on"} { | |
149 | ||
150 | # Follow child / detach parent: the child is under debug and is | |
151 | # the current inferior. The parent is listed but is not under | |
152 | # debug. | |
153 | gdb_test "info inferiors" "\\* 2 .*process.* 1 .*<null>.*" \ | |
154 | "info inferiors" | |
155 | ||
156 | } elseif {$who == "child" && $detach == "off"} { | |
157 | ||
158 | # Follow child / keep parent: two inferiors under debug, the | |
159 | # child is the current inferior. | |
160 | gdb_test "info inferiors" "\\* 2 .*process.* 1 .*process.*" \ | |
161 | "info inferiors" | |
162 | ||
163 | gdb_test "inferior 1" "Switching to inferior 1 .*" | |
164 | set resume_unfollowed 1 | |
165 | } | |
166 | ||
167 | if {$resume_unfollowed == 1} { | |
168 | if {$cmd == "next 2"} { | |
169 | ||
170 | gdb_continue_to_end "continue unfollowed inferior to end" | |
171 | ||
172 | } elseif {$cmd == "continue"} { | |
173 | ||
174 | gdb_continue_to_breakpoint \ | |
175 | "continue unfollowed inferior to bp" \ | |
176 | ".* set breakpoint here.*" | |
177 | } | |
178 | } | |
179 | } | |
74cf1395 JM |
180 | } |
181 | ||
182 | proc catch_fork_child_follow {} { | |
a76e022a MS |
183 | global gdb_prompt |
184 | global srcfile | |
185 | ||
186 | set bp_after_fork [gdb_get_line_number "set breakpoint here"] | |
187 | ||
2c04da0d | 188 | gdb_test "catch fork" "Catchpoint \[0-9\]* \\(fork\\)" \ |
a76e022a MS |
189 | "explicit child follow, set catch fork" |
190 | ||
191 | # Verify that the catchpoint is mentioned in an "info breakpoints", | |
192 | # and further that the catchpoint mentions no process id. | |
193 | # | |
194 | set test_name "info shows catchpoint without pid" | |
195 | gdb_test_multiple "info breakpoints" "$test_name" { | |
196 | -re ".*catchpoint.*keep y.*fork\[\r\n\]+$gdb_prompt $" { | |
197 | pass "$test_name" | |
198 | } | |
199 | } | |
200 | ||
201 | gdb_test "continue" \ | |
2c04da0d | 202 | "Catchpoint \[0-9\]* \\(forked process \[0-9\]*\\),.*" \ |
a76e022a MS |
203 | "explicit child follow, catch fork" |
204 | ||
205 | # Verify that the catchpoint is mentioned in an "info breakpoints", | |
206 | # and further that the catchpoint managed to capture a process id. | |
207 | # | |
208 | set test_name "info shows catchpoint without pid" | |
209 | gdb_test_multiple "info breakpoints" "$test_name" { | |
210 | -re ".*catchpoint.*keep y.*fork, process.*$gdb_prompt $" { | |
211 | pass "$test_name" | |
212 | } | |
213 | } | |
214 | ||
215 | gdb_test_no_output "set follow-fork child" | |
216 | ||
217 | gdb_test "tbreak ${srcfile}:$bp_after_fork" \ | |
218 | "Temporary breakpoint.*, line $bp_after_fork.*" \ | |
219 | "set follow-fork child, tbreak" | |
220 | ||
221 | gdb_test "continue" \ | |
222 | "Attaching after.* fork to.* at .*$bp_after_fork.*" \ | |
223 | "set follow-fork child, hit tbreak" | |
224 | ||
225 | # The parent has been detached; allow time for any output it might | |
226 | # generate to arrive, so that output doesn't get confused with | |
227 | # any expected debugger output from a subsequent testpoint. | |
228 | # | |
229 | exec sleep 1 | |
230 | ||
231 | gdb_test "delete breakpoints" \ | |
232 | "" \ | |
233 | "set follow-fork child, cleanup" \ | |
e9101ff5 | 234 | "Delete all breakpoints. \\(y or n\\) $" \ |
a76e022a | 235 | "y" |
74cf1395 JM |
236 | } |
237 | ||
b242c3c2 | 238 | proc catch_fork_unpatch_child {} { |
a76e022a MS |
239 | global gdb_prompt |
240 | global srcfile | |
241 | ||
242 | set bp_exit [gdb_get_line_number "at exit"] | |
243 | ||
244 | gdb_test "break callee" "file .*$srcfile, line .*" \ | |
245 | "unpatch child, break at callee" | |
246 | gdb_test "catch fork" "Catchpoint \[0-9\]* \\(fork\\)" \ | |
247 | "unpatch child, set catch fork" | |
248 | ||
249 | gdb_test "continue" \ | |
2c04da0d | 250 | "Catchpoint \[0-9\]* \\(forked process \[0-9\]*\\),.*" \ |
a76e022a MS |
251 | "unpatch child, catch fork" |
252 | ||
253 | # Delete all breakpoints and catchpoints. | |
254 | delete_breakpoints | |
255 | ||
256 | # Force $srcfile as the current GDB source can be in glibc sourcetree. | |
257 | gdb_test "break $srcfile:$bp_exit" \ | |
258 | "Breakpoint .*file .*$srcfile, line .*" \ | |
259 | "unpatch child, breakpoint at exit call" | |
260 | ||
27d3a1a2 MS |
261 | gdb_test_no_output "set follow-fork child" \ |
262 | "unpatch child, set follow-fork child" | |
a76e022a MS |
263 | |
264 | set test "unpatch child, unpatched parent breakpoints from child" | |
265 | gdb_test_multiple "continue" $test { | |
266 | -re "at exit.*$gdb_prompt $" { | |
267 | pass "$test" | |
268 | } | |
269 | -re "SIGTRAP.*$gdb_prompt $" { | |
270 | fail "$test" | |
271 | ||
272 | # Explicitly kill this child, so we can continue gracefully | |
273 | # with further testing... | |
274 | send_gdb "kill\n" | |
275 | gdb_expect { | |
276 | -re ".*Kill the program being debugged.*y or n. $" { | |
277 | send_gdb "y\n" | |
278 | gdb_expect -re "$gdb_prompt $" {} | |
279 | } | |
280 | } | |
281 | } | |
282 | } | |
b242c3c2 PA |
283 | } |
284 | ||
74cf1395 | 285 | proc tcatch_fork_parent_follow {} { |
a76e022a MS |
286 | global gdb_prompt |
287 | global srcfile | |
288 | ||
289 | set bp_after_fork [gdb_get_line_number "set breakpoint here"] | |
290 | ||
2c04da0d | 291 | gdb_test "catch fork" "Catchpoint \[0-9\]* \\(fork\\)" \ |
a76e022a MS |
292 | "explicit parent follow, set tcatch fork" |
293 | ||
74cf1395 JM |
294 | # ??rehrauer: I don't yet know how to get the id of the tcatch |
295 | # via this script, so that I can add a -do list to it. For now, | |
296 | # do the follow stuff after the catch happens. | |
297 | ||
2c04da0d UW |
298 | gdb_test "continue" \ |
299 | "Catchpoint \[0-9\]* \\(forked process \[0-9\]*\\),.*" \ | |
a76e022a MS |
300 | "explicit parent follow, tcatch fork" |
301 | ||
302 | gdb_test_no_output "set follow-fork parent" | |
303 | ||
304 | gdb_test "tbreak ${srcfile}:$bp_after_fork" \ | |
305 | "Temporary breakpoint.*, line $bp_after_fork.*" \ | |
306 | "set follow-fork parent, tbreak" | |
307 | ||
308 | gdb_test "continue" \ | |
309 | "Detaching after fork from.* at .*$bp_after_fork.*" \ | |
310 | "set follow-fork parent, hit tbreak" | |
311 | ||
312 | # The child has been detached; allow time for any output it might | |
313 | # generate to arrive, so that output doesn't get confused with | |
314 | # any expected debugger output from a subsequent testpoint. | |
315 | # | |
316 | exec sleep 1 | |
317 | ||
318 | gdb_test "delete breakpoints" \ | |
319 | "" \ | |
320 | "set follow-fork parent, cleanup" \ | |
e9101ff5 | 321 | "Delete all breakpoints. \\(y or n\\) $" \ |
a76e022a | 322 | "y" |
74cf1395 JM |
323 | } |
324 | ||
325 | proc do_fork_tests {} { | |
a76e022a | 326 | global gdb_prompt |
a1aa2221 | 327 | global testfile |
74cf1395 | 328 | |
a76e022a MS |
329 | # Verify that help is available for "set follow-fork-mode". |
330 | # | |
331 | gdb_test "help set follow-fork-mode" \ | |
332 | "Set debugger response to a program call of fork or vfork..* | |
74cf1395 JM |
333 | A fork or vfork creates a new process. follow-fork-mode can be:.* |
334 | .*parent - the original process is debugged after a fork.* | |
335 | .*child - the new process is debugged after a fork.* | |
ef04f396 | 336 | The unfollowed process will continue to run..* |
a76e022a MS |
337 | By default, the debugger will follow the parent process..*" \ |
338 | "help set follow-fork" | |
339 | ||
340 | # Verify that we can set follow-fork-mode, using an abbreviation | |
341 | # for both the flag and its value. | |
342 | # | |
343 | gdb_test_no_output "set follow-fork ch" | |
344 | ||
345 | gdb_test "show follow-fork" \ | |
346 | "Debugger response to a program call of fork or vfork is \"child\".*" \ | |
347 | "set follow-fork, using abbreviations" | |
348 | ||
349 | # Verify that we cannot set follow-fork-mode to nonsense. | |
350 | # | |
351 | gdb_test "set follow-fork chork" "Undefined item: \"chork\".*" \ | |
352 | "set follow-fork to nonsense is prohibited" | |
353 | ||
354 | gdb_test_no_output "set follow-fork parent" "reset parent" | |
355 | ||
356 | # Check that fork catchpoints are supported, as an indicator for whether | |
357 | # fork-following is supported. | |
358 | if [runto_main] then { check_fork_catchpoints } | |
359 | ||
a1aa2221 LM |
360 | # Test the basic follow-fork functionality using all combinations of |
361 | # values for follow-fork-mode and detach-on-fork, using either a | |
362 | # breakpoint or single-step to execute past the fork. | |
a76e022a | 363 | # |
a1aa2221 LM |
364 | # The first loop should be sufficient to test the defaults. There |
365 | # is no need to test using the defaults in other permutations (e.g. | |
366 | # "default" "on", "parent" "default", etc.). | |
367 | foreach cmd {"next 2" "continue"} { | |
368 | test_follow_fork "default" "default" $cmd | |
369 | } | |
a76e022a | 370 | |
a1aa2221 LM |
371 | # Now test all explicit permutations. |
372 | foreach who {"parent" "child"} { | |
373 | foreach detach {"on" "off"} { | |
374 | foreach cmd {"next 2" "continue"} { | |
375 | test_follow_fork $who $detach $cmd | |
376 | } | |
377 | } | |
378 | } | |
a76e022a | 379 | |
a1aa2221 | 380 | # Catchpoint tests. |
a76e022a | 381 | |
a1aa2221 LM |
382 | # Restart to eliminate any effects of the follow-fork tests. |
383 | clean_restart $testfile | |
384 | gdb_test_no_output "set verbose" | |
a76e022a MS |
385 | |
386 | # Test the ability to catch a fork, specify that the child be | |
387 | # followed, and continue. Make the catchpoint permanent. | |
388 | # | |
389 | if [runto_main] then { catch_fork_child_follow } | |
390 | ||
391 | # Test that parent breakpoints are successfully detached from the | |
392 | # child at fork time, even if the user removes them from the | |
393 | # breakpoints list after stopping at a fork catchpoint. | |
394 | if [runto_main] then { catch_fork_unpatch_child } | |
395 | ||
396 | # Test the ability to catch a fork, specify via a -do clause that | |
397 | # the parent be followed, and continue. Make the catchpoint temporary. | |
398 | # | |
399 | if [runto_main] then { tcatch_fork_parent_follow } | |
74cf1395 JM |
400 | } |
401 | ||
e85a822c DJ |
402 | # The "Detaching..." and "Attaching..." messages may be hidden by |
403 | # default. | |
27d3a1a2 | 404 | gdb_test_no_output "set verbose" |
74cf1395 JM |
405 | |
406 | # This is a test of gdb's ability to follow the parent, child or both | |
407 | # parent and child of a Unix fork() system call. | |
408 | # | |
409 | do_fork_tests | |
410 | ||
411 | return 0 |