1 # Copyright 1997, 1999, 2007, 2008, 2009 Free Software Foundation, Inc.
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.
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.
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/>.
16 if { [is_remote target] || ![isnative] } then {
24 set testfile "foll-fork"
25 set srcfile ${testfile}.c
26 set binfile ${objdir}/${subdir}/${testfile}
28 if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
29 untested foll-fork.exp
35 # Until "set follow-fork-mode" and "catch fork" are implemented on
38 if {![istarget "hppa*-hp-hpux*"] && ![istarget "*-linux*"]} then {
42 proc check_fork_catchpoints {} {
45 # Verify that the system supports "catch fork".
46 gdb_test "catch fork" "Catchpoint \[0-9\]* \\(fork\\)" "insert first fork catchpoint"
47 set has_fork_catchpoints 0
48 gdb_test_multiple "continue" "continue to first fork catchpoint" {
49 -re ".*Your system does not support fork catchpoints.*$gdb_prompt $" {
50 unsupported "continue to first fork catchpoint"
52 -re ".*Catchpoint.*$gdb_prompt $" {
53 set has_fork_catchpoints 1
54 pass "continue to first fork catchpoint"
58 if {$has_fork_catchpoints == 0} {
59 unsupported "fork catchpoints"
64 proc default_fork_parent_follow {} {
67 send_gdb "show follow-fork\n"
69 -re "Debugger response to a program call of fork or vfork is \"parent\"..*$gdb_prompt $"\
70 {pass "default show parent follow, no catchpoints"}
71 -re "$gdb_prompt $" {fail "default show parent follow, no catchpoints"}
72 timeout {fail "(timeout) default show parent follow, no catchpoints"}
76 -re "Detaching after fork from.*$gdb_prompt $"\
77 {pass "default parent follow, no catchpoints"}
78 -re "$gdb_prompt $" {fail "default parent follow, no catchpoints"}
79 timeout {fail "(timeout) default parent follow, no catchpoints" }
81 # The child has been detached; allow time for any output it might
82 # generate to arrive, so that output doesn't get confused with
83 # any expected debugger output from a subsequent testpoint.
88 proc explicit_fork_parent_follow {} {
91 send_gdb "set follow-fork parent\n"
93 -re "$gdb_prompt $" {pass "set follow-fork parent"}
94 timeout {fail "(timeout) set follow-fork parent"}
96 send_gdb "show follow-fork\n"
98 -re "Debugger response to a program call of fork or vfork is \"parent\"..*$gdb_prompt $"\
99 {pass "explicit show parent follow, no catchpoints"}
100 -re "$gdb_prompt $" {fail "explicit show parent follow, no catchpoints"}
101 timeout {fail "(timeout) explicit show parent follow, no catchpoints"}
105 -re "Detaching after fork from.*$gdb_prompt $"\
106 {pass "explicit parent follow, no catchpoints"}
107 -re "$gdb_prompt $" {fail "explicit parent follow, no catchpoints"}
108 timeout {fail "(timeout) explicit parent follow, no catchpoints"}
110 # The child has been detached; allow time for any output it might
111 # generate to arrive, so that output doesn't get confused with
112 # any expected debugger output from a subsequent testpoint.
117 proc explicit_fork_child_follow {} {
120 send_gdb "set follow-fork child\n"
122 -re "$gdb_prompt $" {pass "set follow-fork child"}
123 timeout {fail "(timeout) set follow-fork child"}
125 send_gdb "show follow-fork\n"
127 -re "Debugger response to a program call of fork or vfork is \"child\"..*$gdb_prompt $"\
128 {pass "explicit show child follow, no catchpoints"}
129 -re "$gdb_prompt $" {fail "explicit show child follow, no catchpoints"}
130 timeout {fail "(timeout) explicit show child follow, no catchpoints"}
134 -re "Attaching after.* fork to.*$gdb_prompt $"\
135 {pass "explicit child follow, no catchpoints"}
136 -re "$gdb_prompt $" {fail "explicit child follow, no catchpoints"}
137 timeout {fail "(timeout) explicit child follow, no catchpoints"}
139 # The child has been detached; allow time for any output it might
140 # generate to arrive, so that output doesn't get confused with
141 # any gdb_expected debugger output from a subsequent testpoint.
146 proc catch_fork_child_follow {} {
150 set bp_after_fork [gdb_get_line_number "set breakpoint here"]
152 send_gdb "catch fork\n"
154 -re "Catchpoint .*(fork).*$gdb_prompt $"\
155 {pass "explicit child follow, set catch fork"}
156 -re "$gdb_prompt $" {fail "explicit child follow, set catch fork"}
157 timeout {fail "(timeout) explicit child follow, set catch fork"}
160 # Verify that the catchpoint is mentioned in an "info breakpoints",
161 # and further that the catchpoint mentions no process id.
163 set test_name "info shows catchpoint without pid"
164 gdb_test_multiple "info breakpoints" "$test_name" {
165 -re ".*catchpoint.*keep y.*fork\[\r\n\]+$gdb_prompt $" {
170 send_gdb "continue\n"
172 -re "Catchpoint.*(forked process.*),.*in .*(fork|__kernel_v?syscall).*$gdb_prompt $"\
173 {pass "explicit child follow, catch fork"}
174 -re "$gdb_prompt $" {fail "explicit child follow, catch fork"}
175 timeout {fail "(timeout) explicit child follow, catch fork"}
178 # Verify that the catchpoint is mentioned in an "info breakpoints",
179 # and further that the catchpoint managed to capture a process id.
181 set test_name "info shows catchpoint without pid"
182 gdb_test_multiple "info breakpoints" "$test_name" {
183 -re ".*catchpoint.*keep y.*fork, process.*$gdb_prompt $" {
188 send_gdb "set follow-fork child\n"
190 -re "$gdb_prompt $" {pass "set follow-fork child"}
191 timeout {fail "(timeout) set follow-fork child"}
193 send_gdb "tbreak ${srcfile}:$bp_after_fork\n"
195 -re "Temporary breakpoint.*, line $bp_after_fork.*$gdb_prompt $"\
196 {pass "set follow-fork child, tbreak"}
197 -re "$gdb_prompt $" {fail "set follow-fork child, tbreak"}
198 timeout {fail "(timeout) set follow-fork child, tbreak"}
200 send_gdb "continue\n"
202 -re "Attaching after.* fork to.* at .*$bp_after_fork.*$gdb_prompt $"\
203 {pass "set follow-fork child, hit tbreak"}
204 -re "$gdb_prompt $" {fail "set follow-fork child, hit tbreak"}
205 timeout {fail "(timeout) set follow-fork child, hit tbreak"}
207 # The parent has been detached; allow time for any output it might
208 # generate to arrive, so that output doesn't get confused with
209 # any expected debugger output from a subsequent testpoint.
212 send_gdb "delete breakpoints\n"
214 -re "Delete all breakpoints.*$" {
218 {pass "set follow-fork child, cleanup"}
219 timeout {fail "(timeout) set follow-fork child, cleanup"}
222 -re "$gdb_prompt $" {fail "set follow-fork child, cleanup"}
223 timeout {fail "(timeout) set follow-fork child, cleanup"}
227 proc catch_fork_unpatch_child {} {
231 set bp_exit [gdb_get_line_number "at exit"]
233 gdb_test "break callee" "file .*$srcfile, line .*" "unpatch child, break at callee"
234 gdb_test "catch fork" "Catchpoint \[0-9\]* \\(fork\\)" "unpatch child, set catch fork"
236 gdb_test "continue" \
237 "Catchpoint.*\\(forked process.*\\).*,.*in .*(fork|__kernel_v?syscall).*" \
238 "unpatch child, catch fork"
240 # Delete all breakpoints and catchpoints.
243 gdb_test "break $bp_exit" \
244 "Breakpoint .*file .*$srcfile, line .*" \
245 "unpatch child, breakpoint at exit call"
247 gdb_test "set follow-fork child" "" "unpatch child, set follow-fork child"
249 set test "unpatch child, unpatched parent breakpoints from child"
250 gdb_test_multiple "continue" $test {
251 -re "at exit.*$gdb_prompt $" {
254 -re "SIGTRAP.*$gdb_prompt $" {
257 # Explicitly kill this child, so we can continue gracefully
258 # with further testing...
261 -re ".*Kill the program being debugged.*y or n. $" {
263 gdb_expect -re "$gdb_prompt $" {}
267 -re ".*$gdb_prompt $" {
268 fail "$test (unknown output)"
271 fail "$test (timeout)"
276 proc tcatch_fork_parent_follow {} {
280 set bp_after_fork [gdb_get_line_number "set breakpoint here"]
282 send_gdb "catch fork\n"
284 -re "Catchpoint .*(fork).*$gdb_prompt $"\
285 {pass "explicit parent follow, set tcatch fork"}
286 -re "$gdb_prompt $" {fail "explicit parent follow, set tcatch fork"}
287 timeout {fail "(timeout) explicit parent follow, set tcatch fork"}
289 # ??rehrauer: I don't yet know how to get the id of the tcatch
290 # via this script, so that I can add a -do list to it. For now,
291 # do the follow stuff after the catch happens.
293 send_gdb "continue\n"
295 -re ".*in .*(fork|__kernel_v?syscall).*$gdb_prompt $"\
296 {pass "explicit parent follow, tcatch fork"}
297 -re "$gdb_prompt $" {fail "explicit parent follow, tcatch fork"}
298 timeout {fail "(timeout) explicit parent follow, tcatch fork"}
300 send_gdb "set follow-fork parent\n"
302 -re "$gdb_prompt $" {pass "set follow-fork parent"}
303 timeout {fail "(timeout) set follow-fork parent"}
305 send_gdb "tbreak ${srcfile}:$bp_after_fork\n"
307 -re "Temporary breakpoint.*, line $bp_after_fork.*$gdb_prompt $"\
308 {pass "set follow-fork parent, tbreak"}
309 -re "$gdb_prompt $" {fail "set follow-fork parent, tbreak"}
310 timeout {fail "(timeout) set follow-fork child, tbreak"}
312 send_gdb "continue\n"
314 -re ".*Detaching after fork from.* at .*$bp_after_fork.*$gdb_prompt $"\
315 {pass "set follow-fork parent, hit tbreak"}
316 -re "$gdb_prompt $" {fail "set follow-fork parent, hit tbreak"}
317 timeout {fail "(timeout) set follow-fork parent, hit tbreak"}
319 # The child has been detached; allow time for any output it might
320 # generate to arrive, so that output doesn't get confused with
321 # any expected debugger output from a subsequent testpoint.
324 send_gdb "delete breakpoints\n"
326 -re "Delete all breakpoints.*$" {
330 {pass "set follow-fork parent, cleanup"}
331 timeout {fail "(timeout) set follow-fork parent, cleanup"}
334 -re "$gdb_prompt $" {fail "set follow-fork parent, cleanup"}
335 timeout {fail "(timeout) set follow-fork parent, cleanup"}
339 proc do_fork_tests {} {
342 # Verify that help is available for "set follow-fork-mode".
344 send_gdb "help set follow-fork-mode\n"
346 -re "Set debugger response to a program call of fork or vfork..*
347 A fork or vfork creates a new process. follow-fork-mode can be:.*
348 .*parent - the original process is debugged after a fork.*
349 .*child - the new process is debugged after a fork.*
350 The unfollowed process will continue to run..*
351 By default, the debugger will follow the parent process..*$gdb_prompt $"\
352 { pass "help set follow-fork" }
353 -re "$gdb_prompt $" { fail "help set follow" }
354 timeout { fail "(timeout) help set follow-fork" }
357 # Verify that we can set follow-fork-mode, using an abbreviation
358 # for both the flag and its value.
360 send_gdb "set follow-fork ch\n"
361 send_gdb "show follow-fork\n"
363 -re "Debugger response to a program call of fork or vfork is \"child\".*$gdb_prompt $"\
364 {pass "set follow-fork, using abbreviations"}
365 timeout {fail "(timeout) set follow-fork, using abbreviations"}
368 # Verify that we cannot set follow-fork-mode to nonsense.
370 send_gdb "set follow-fork chork\n"
372 -re "Undefined item: \"chork\".*$gdb_prompt $"\
373 {pass "set follow-fork to nonsense is prohibited"}
374 -re "$gdb_prompt $" {fail "set follow-fork to nonsense is prohibited"}
375 timeout {fail "(timeout) set follow-fork to nonsense is prohibited"}
377 send_gdb "set follow-fork parent\n"
379 -re "$gdb_prompt $" {pass "set follow-fork to nonsense is prohibited (reset parent)"}
380 timeout {fail "set follow-fork to nonsense is prohibited (reset parent)"}
383 # Check that fork catchpoints are supported, as an indicator for whether
384 # fork-following is supported.
385 if [runto_main] then { check_fork_catchpoints }
387 # Test the default behaviour, which is to follow the parent of a
388 # fork, and detach from the child. Do this without catchpoints.
390 if [runto_main] then { default_fork_parent_follow }
392 # Test the ability to explicitly follow the parent of a fork, and
393 # detach from the child. Do this without catchpoints.
395 if [runto_main] then { explicit_fork_parent_follow }
397 # Test the ability to follow the child of a fork, and detach from
398 # the parent. Do this without catchpoints.
400 if [runto_main] then { explicit_fork_child_follow }
402 # Test the ability to follow both child and parent of a fork. Do
403 # this without catchpoints.
404 # ??rehrauer: NYI. Will add testpoints here when implemented.
407 # Test the ability to have the debugger ask the user at fork-time
408 # whether to follow the parent, child or both. Do this without
410 # ??rehrauer: NYI. Will add testpoints here when implemented.
413 # Test the ability to catch a fork, specify that the child be
414 # followed, and continue. Make the catchpoint permanent.
416 if [runto_main] then { catch_fork_child_follow }
418 # Test that parent breakpoints are successfully detached from the
419 # child at fork time, even if the user removes them from the
420 # breakpoints list after stopping at a fork catchpoint.
421 if [runto_main] then { catch_fork_unpatch_child }
423 # Test the ability to catch a fork, specify via a -do clause that
424 # the parent be followed, and continue. Make the catchpoint temporary.
426 if [runto_main] then { tcatch_fork_parent_follow }
429 # Start with a fresh gdb
433 gdb_reinitialize_dir $srcdir/$subdir
436 # The "Detaching..." and "Attaching..." messages may be hidden by
438 gdb_test "set verbose" ""
440 # This is a test of gdb's ability to follow the parent, child or both
441 # parent and child of a Unix fork() system call.