1 # Copyright 1997-2013 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 # Various tests of gdb's ability to follow the parent or child of a
17 # Unix vfork system call. A vfork parent is blocked until the child
18 # either execs or exits --- since those events take somewhat different
19 # code paths in GDB, both variants are exercised.
21 if { [is_remote target] || ![isnative] } then {
25 # Until "set follow-fork-mode" and "catch vfork" are implemented on
28 if {![istarget "hppa*-hp-hpux*"] && ![istarget "*-linux*"]} then {
32 # Test to see if we are on an HP-UX 10.20 and if so,
33 # do not run these tests as catching vfork is disabled for
36 if [istarget "hppa*-hp-hpux10.20"] then {
40 # NOTE drow/2002-12-06: I don't know what the referenced kernel problem
41 # is, but it appears to be fixed in recent HP/UX versions.
43 ##if [istarget "hppa2.0w-hp-hpux*"] {
44 ## warning "Don't run gdb.base/foll-vfork.exp until JAGaa43495 kernel problem is fixed."
50 set compile_options debug
51 set dirname [relative_filename [pwd] [file dirname $binfile]]
52 lappend compile_options "additional_flags=-DBASEDIR=\"$dirname\""
54 if {[build_executable $testfile.exp $testfile $srcfile $compile_options] == -1} {
55 untested "failed to compile $testfile"
59 set testfile2 "vforked-prog"
60 set srcfile2 ${testfile2}.c
62 if {[build_executable $testfile.exp $testfile2 $srcfile2 $compile_options] == -1} {
63 untested "failed to compile $testfile2"
67 # A few of these tests require a little more time than the standard
69 set oldtimeout $timeout
70 set timeout [expr "$timeout + 10"]
72 # Start with a fresh GDB, with verbosity enabled, and run to main. On
73 # error, behave as "return", so we don't try to continue testing with
78 clean_restart $testfile
80 # The "Detaching..." and "Attaching..." messages may be hidden by
82 gdb_test_no_output "set verbose"
89 proc check_vfork_catchpoints {} {
91 global has_vfork_catchpoints
95 # Verify that the system supports "catch vfork".
96 gdb_test "catch vfork" "Catchpoint \[0-9\]* \\(vfork\\)" "insert first vfork catchpoint"
97 set has_vfork_catchpoints 0
98 gdb_test_multiple "continue" "continue to first vfork catchpoint" {
99 -re ".*Your system does not support this type\r\nof catchpoint.*$gdb_prompt $" {
100 unsupported "continue to first vfork catchpoint"
102 -re ".*Catchpoint.*$gdb_prompt $" {
103 set has_vfork_catchpoints 1
104 pass "continue to first vfork catchpoint"
108 if {$has_vfork_catchpoints == 0} {
109 unsupported "vfork catchpoints"
114 proc vfork_parent_follow_through_step {} {
115 with_test_prefix "vfork parent follow, through step" {
120 gdb_test_no_output "set follow-fork parent"
123 gdb_test_multiple "next" $test {
124 -re "Detaching after fork from.*if \\(pid == 0\\).*$gdb_prompt " {
128 # The child has been detached; allow time for any output it might
129 # generate to arrive, so that output doesn't get confused with
130 # any gdb_expected debugger output from a subsequent testpoint.
135 proc vfork_parent_follow_to_bp {} {
136 with_test_prefix "vfork parent follow, to bp" {
142 gdb_test_no_output "set follow-fork parent"
144 set bp_location [gdb_get_line_number "printf (\"I'm the proud parent of child"]
145 gdb_test "break ${srcfile}:${bp_location}" ".*" "break, vfork to bp"
147 set test "continue to bp"
148 gdb_test_multiple "continue" $test {
149 -re ".*Detaching after fork from child process.*Breakpoint.*${bp_location}.*$gdb_prompt " {
153 # The child has been detached; allow time for any output it might
154 # generate to arrive, so that output doesn't get confused with
155 # any expected debugger output from a subsequent testpoint.
160 proc vfork_child_follow_to_exit {} {
161 with_test_prefix "vfork child follow, to exit" {
166 gdb_test_no_output "set follow-fork child"
168 set test "continue to child exit"
169 gdb_test_multiple "continue" $test {
170 -re "Couldn't get registers.*$gdb_prompt " {
174 -re "Attaching after.* vfork to.*Detaching vfork parent .* after child exit.*$gdb_prompt " {
178 # The parent has been detached; allow time for any output it might
179 # generate to arrive, so that output doesn't get confused with
180 # any gdb_expected debugger output from a subsequent testpoint.
185 proc vfork_and_exec_child_follow_to_main_bp {} {
186 with_test_prefix "vfork and exec child follow, to main bp" {
192 gdb_test_no_output "set follow-fork child"
194 set linenum [gdb_get_line_number "printf(\"Hello from vforked-prog" ${srcfile2}]
196 set test "continue to bp"
197 gdb_test_multiple "continue" $test {
198 -re "Attaching after.* vfork to.*xecuting new program.*Breakpoint.*vforked-prog.c:${linenum}.*$gdb_prompt " {
202 # The parent has been detached; allow time for any output it might
203 # generate to arrive, so that output doesn't get confused with
204 # any gdb_expected debugger output from a subsequent testpoint.
209 proc vfork_and_exec_child_follow_through_step {} {
210 with_test_prefix "vfork and exec child follow, through step" {
214 if { [istarget "hppa*-*-hpux*"] && ![istarget "hppa*-*-hpux11.*"] } {
215 # This test cannot be performed prior to HP-UX 10.30, because
216 # ptrace-based debugging of a vforking program basically doesn't
217 # allow the child to do things like hit a breakpoint between a
218 # vfork and exec. This means that saying "set follow-fork
219 # child; next" at a vfork() call won't work, because the
220 # implementation of "next" sets a "step resume" breakpoint at
221 # the return from the vfork(), which the child will hit on its
224 verbose "vfork child-following next test ignored for pre-HP/UX-10.30 targets."
230 gdb_test_no_output "set follow-fork child"
232 set test "step over vfork"
233 if { [istarget "hppa*-*-hpux*"]} {
234 # Since the child cannot be debugged until after it has exec'd,
235 # and since there's a bp on "main" in the parent, and since the
236 # bp's for the parent are recomputed in the exec'd child, the
237 # step through a vfork should land us in the "main" for the
240 set linenum [gdb_get_line_number "printf(\"Hello from vforked-prog" ${srcfile2}]
241 gdb_test_multiple "next" $test {
242 -re "Attaching after fork to.*Executing new program.*Breakpoint.*vforked-prog.c:${linenum}.*$gdb_prompt " {
247 # The ideal support is to be able to debug the child even
248 # before it execs. Thus, "next" lands on the next line after
250 gdb_test_multiple "next" $test {
251 -re "Attaching after .* vfork to child.*if \\(pid == 0\\).*$gdb_prompt " {
256 # The parent has been detached; allow time for any output it might
257 # generate to arrive, so that output doesn't get confused with
258 # any expected debugger output from a subsequent testpoint.
263 proc tcatch_vfork_then_parent_follow {} {
264 with_test_prefix "vfork parent follow, finish after tcatch vfork" {
270 gdb_test_no_output "set follow-fork parent"
272 gdb_test "tcatch vfork" "Catchpoint .*(vfork).*"
274 # HP-UX 10.20 seems to stop you in "vfork", while more recent
275 # HP-UXs stop you in "_vfork".
276 set test "continue to vfork"
277 gdb_test_multiple "continue" $test {
278 -re "0x\[0-9a-fA-F\]*.*(vfork|__kernel_v?syscall).*$gdb_prompt " {
281 -re "vfork \\(\\) at.*$gdb_prompt " {
286 set linenum [gdb_get_line_number "pid = vfork ();"]
288 gdb_test_multiple "finish" $test {
289 -re "Run till exit from.*vfork.*0x\[0-9a-fA-F\]* in main .* at .*${srcfile}:${linenum}.*$gdb_prompt " {
292 -re "Run till exit from.*__kernel_v?syscall.*0x\[0-9a-fA-F\]* in vfork .*$gdb_prompt " {
297 # The child has been detached; allow time for any output it might
298 # generate to arrive, so that output doesn't get confused with
299 # any expected debugger output from a subsequent testpoint.
304 proc tcatch_vfork_then_child_follow_exec {} {
305 with_test_prefix "vfork child follow, finish after tcatch vfork" {
312 gdb_test_no_output "set follow-fork child"
314 gdb_test "tcatch vfork" "Catchpoint .*(vfork).*"
316 # HP-UX 10.20 seems to stop you in "vfork", while more recent HP-UXs
317 # stop you in "_vfork".
318 set test "continue to vfork"
319 gdb_test_multiple "continue" $test {
320 -re "vfork \\(\\) at .*$gdb_prompt $" {
323 -re "0x\[0-9a-fA-F\]*.*(vfork|__kernel_v?syscall).*$gdb_prompt " {
328 set linenum1 [gdb_get_line_number "pid = vfork ();"]
329 set linenum2 [gdb_get_line_number "printf(\"Hello from vforked-prog" ${srcfile2}]
332 gdb_test_multiple "finish" $test {
333 -re "Run till exit from.*vfork.*${srcfile}:${linenum1}.*$gdb_prompt " {
336 -re "Run till exit from.*__kernel_v?syscall.*0x\[0-9a-fA-F\]* in vfork .*$gdb_prompt " {
340 -re "Run till exit from.*vfork.*${srcfile2}:${linenum2}.*$gdb_prompt " {
341 pass "$test (followed exec)"
344 # The parent has been detached; allow time for any output it might
345 # generate to arrive, so that output doesn't get confused with
346 # any expected debugger output from a subsequent testpoint.
351 proc tcatch_vfork_then_child_follow_exit {} {
352 with_test_prefix "vfork child follow, finish after tcatch vfork" {
358 gdb_test_no_output "set follow-fork child"
360 gdb_test "tcatch vfork" "Catchpoint .*(vfork).*"
362 # HP-UX 10.20 seems to stop you in "vfork", while more recent HP-UXs
363 # stop you in "_vfork".
364 set test "continue to vfork"
365 gdb_test_multiple "continue" $test {
366 -re "vfork \\(\\) at .*$gdb_prompt $" {
369 -re "0x\[0-9a-fA-F\]*.*(vfork|__kernel_v?syscall).*$gdb_prompt " {
375 gdb_test_multiple "finish" $test {
376 -re "Run till exit from.*vfork.*exited normally.*$gdb_prompt " {
377 setup_kfail "gdb/14762" *-*-*
380 -re "Run till exit from.*vfork.*pid = vfork \\(\\).*$gdb_prompt " {
383 -re "Run till exit from.*__kernel_v?syscall.*0x\[0-9a-fA-F\]* in vfork .*$gdb_prompt " {
388 # The parent has been detached; allow time for any output it might
389 # generate to arrive, so that output doesn't get confused with
390 # any expected debugger output from a subsequent testpoint.
395 proc vfork_relations_in_info_inferiors { variant } {
396 with_test_prefix "vfork relations in info inferiors" {
401 gdb_test_no_output "set follow-fork child"
403 set test "step over vfork"
404 gdb_test_multiple "next" $test {
405 -re "Attaching after .* vfork to child.*if \\(pid == 0\\).*$gdb_prompt " {
410 gdb_test "info inferiors" \
411 ".*is vfork child of inferior 1.*is vfork parent of inferior 2" \
412 "info inferiors shows vfork parent/child relation"
414 if { $variant == "exec" } {
417 set linenum [gdb_get_line_number "printf(\"Hello from vforked-prog" ${srcfile2}]
418 set test "continue to bp"
419 gdb_test_multiple "continue" $test {
420 -re ".*xecuting new program.*Breakpoint.*vforked-prog.c:${linenum}.*$gdb_prompt " {
425 set test "continue to child exit"
426 gdb_test_multiple "continue" $test {
427 -re "exited normally.*$gdb_prompt " {
433 set test "vfork relation no longer appears in info inferiors"
434 gdb_test_multiple "info inferiors" $test {
435 -re "is vfork child of inferior 1.*$gdb_prompt $" {
438 -re "is vfork parent of inferior 2.*$gdb_prompt $" {
441 -re "$gdb_prompt $" {
447 proc do_vfork_and_follow_parent_tests {} {
450 # Try following the parent process by stepping through a call to
451 # vfork. Do this without catchpoints.
452 vfork_parent_follow_through_step
454 # Try following the parent process by setting a breakpoint on the
455 # other side of a vfork, and running to that point. Do this
456 # without catchpoints.
457 vfork_parent_follow_to_bp
459 # Try catching a vfork, and stepping out to the parent.
461 tcatch_vfork_then_parent_follow
464 proc do_vfork_and_follow_child_tests_exec {} {
465 # Try following the child process by just continuing through the
466 # vfork, and letting the parent's breakpoint on "main" be auto-
467 # magically reset in the child.
469 vfork_and_exec_child_follow_to_main_bp
471 # Try following the child process by stepping through a call to
472 # vfork. The child also executes an exec. Since the child cannot
473 # be debugged until after it has exec'd, and since there's a bp on
474 # "main" in the parent, and since the bp's for the parent are
475 # recomputed in the exec'd child, the step through a vfork should
476 # land us in the "main" for the exec'd child, too.
478 vfork_and_exec_child_follow_through_step
480 # Try catching a vfork, and stepping out to the child.
482 tcatch_vfork_then_child_follow_exec
484 # Test the ability to follow both child and parent of a vfork. Do
485 # this without catchpoints.
486 # ??rehrauer: NYI. Will add testpoints here when implemented.
489 # Test the ability to have the debugger ask the user at vfork-time
490 # whether to follow the parent, child or both. Do this without
492 # ??rehrauer: NYI. Will add testpoints here when implemented.
495 # Step over a vfork in the child, do "info inferiors" and check the
496 # parent/child relation is displayed. Run the child over the exec,
497 # and confirm the relation is no longer displayed in "info
500 vfork_relations_in_info_inferiors "exec"
503 proc do_vfork_and_follow_child_tests_exit {} {
504 # Try following the child process by just continuing through the
505 # vfork, and letting the child exit.
507 vfork_child_follow_to_exit
509 # Try catching a vfork, and stepping out to the child.
511 tcatch_vfork_then_child_follow_exit
513 # Step over a vfork in the child, do "info inferiors" and check the
514 # parent/child relation is displayed. Run the child to completion,
515 # and confirm the relation is no longer displayed in "info
518 vfork_relations_in_info_inferiors "exit"
521 with_test_prefix "check vfork support" {
522 # Check that vfork catchpoints are supported, as an indicator for
523 # whether vfork-following is supported.
524 check_vfork_catchpoints
527 # Follow parent and follow child vfork tests with a child that execs.
528 with_test_prefix "exec" {
529 # These are tests of gdb's ability to follow the parent of a Unix
530 # vfork system call. The child will subsequently call a variant
531 # of the Unix exec system call.
532 do_vfork_and_follow_parent_tests
534 # These are tests of gdb's ability to follow the child of a Unix
535 # vfork system call. The child will subsequently call a variant
536 # of a Unix exec system call.
538 do_vfork_and_follow_child_tests_exec
541 # Switch to test the case of the child exiting. We can't use
542 # standard_testfile here because we don't want to overwrite the binary
543 # of the previous tests.
544 set testfile "foll-vfork-exit"
545 set srcfile ${testfile}.c
546 set binfile [standard_output_file ${testfile}]
548 if {[build_executable $testfile.exp $testfile $srcfile] == -1} {
549 untested "failed to build $testfile"
553 # Follow parent and follow child vfork tests with a child that exits.
554 with_test_prefix "exit" {
555 # These are tests of gdb's ability to follow the parent of a Unix
556 # vfork system call. The child will subsequently exit.
557 do_vfork_and_follow_parent_tests
559 # These are tests of gdb's ability to follow the child of a Unix
560 # vfork system call. The child will subsequently exit.
562 do_vfork_and_follow_child_tests_exit
565 set timeout $oldtimeout