[thirdparty/binutils-gdb.git] / gdb / testsuite / gdb.base / foll-fork.exp

#   Copyright 1997-2015 Free Software Foundation, Inc.

# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

if { [is_remote target] || ![isnative] } then {
    continue
}

# Until "set follow-fork-mode" and "catch fork" are implemented on
# other targets...
#
if { ![istarget "hppa*-hp-hpux*"] && ![istarget "*-*-linux*"]
     && ![istarget "*-*-openbsd*"] } then {
    continue
}

standard_testfile

if {[prepare_for_testing $testfile.exp $testfile $srcfile debug]} {
    untested $testfile.exp
    return -1
}

proc check_fork_catchpoints {} {
  global gdb_prompt

  # Verify that the system supports "catch fork".
  gdb_test "catch fork" "Catchpoint \[0-9\]* \\(fork\\)" "insert first fork catchpoint"
  set has_fork_catchpoints 0
  gdb_test_multiple "continue" "continue to first fork catchpoint" {
    -re ".*Your system does not support this type\r\nof catchpoint.*$gdb_prompt $" {
      unsupported "continue to first fork catchpoint"
    }
    -re ".*Catchpoint.*$gdb_prompt $" {
      set has_fork_catchpoints 1
      pass "continue to first fork catchpoint"
    }
  }

  if {$has_fork_catchpoints == 0} {
    unsupported "fork catchpoints"
    return -code return
  }
}

# Test follow-fork to ensure that the correct process is followed, that
# the followed process stops where it is expected to stop, that processes
# are detached (or not) as expected, and that the inferior list has the
# expected contents after following the fork.  WHO is the argument to
# the 'set follow-fork-mode' command, DETACH is the argument to the 
# 'set detach-on-fork' command, and CMD is the GDB command used to 
# execute the program past the fork.  If the value of WHO or DETACH is
# 'default', the corresponding GDB command is skipped for that test.
# The value of CMD must be either 'next 2' or 'continue'.
proc test_follow_fork { who detach cmd } {
    global gdb_prompt
    global srcfile
    global testfile

    with_test_prefix "follow $who, detach $detach, command \"$cmd\"" {

	# Start a new debugger session each time so defaults are legitimate.
	clean_restart $testfile

	if ![runto_main] {
	    untested "could not run to main"
	    return -1
	}

	# The "Detaching..." and "Attaching..." messages may be hidden by
	# default.
	gdb_test_no_output "set verbose"

	# Set follow-fork-mode if we aren't using the default.
	if {$who == "default"} {
	    set who "parent"
	} else {
	    gdb_test_no_output "set follow-fork $who"
	}

	gdb_test "show follow-fork" \
	"Debugger response to a program call of fork or vfork is \"$who\"." \
	"show follow-fork"

	# Set detach-on-fork mode if we aren't using the default.
	if {$detach == "default"} {
	    set detach "on"
	} else {
	    gdb_test_no_output "set detach-on-fork $detach"
	}

	gdb_test "show detach-on-fork" \
		 "Whether gdb will detach.* fork is $detach." \
		 "show detach-on-fork"

	# Set a breakpoint after the fork if we aren't single-stepping
	# past the fork.
	if {$cmd == "continue"} {
	    set bp_after_fork [gdb_get_line_number "set breakpoint here"]
	    gdb_test "break ${srcfile}:$bp_after_fork" \
		     "Breakpoint.*, line $bp_after_fork.*" \
		     "set breakpoint after fork"
	}

	# Set up the output we expect to see after we run.
	set expected_re ""
	if {$who == "child"} {
	    set expected_re "Attaching after.* fork to.*"
	    if {$detach == "on"} {
		append expected_re "Detaching after fork from .*"
	    }
	    append expected_re "set breakpoint here.*"
	} elseif {$who == "parent" && $detach == "on"} {
	    set expected_re "Detaching after fork from .*set breakpoint here.*"
	} else {
	    set expected_re ".*set breakpoint here.*"
	}

	# Test running past and following the fork, using the parameters
	# set above.
	gdb_test $cmd $expected_re "$cmd past fork"

	# Check that we have the inferiors arranged correctly after 
	# following the fork.
	set resume_unfollowed 0
	if {$who == "parent" && $detach == "on"} {

	    # Follow parent / detach child: the only inferior is the parent.
	    gdb_test "info inferiors" "\\* 1 .* process.*" \
		     "info inferiors"

	} elseif {$who == "parent" && $detach == "off"} {

	    # Follow parent / keep child: two inferiors under debug, the
	    # parent is the current inferior.
	    gdb_test "info inferiors" "\\* 1 .*process.* 2 .*process.*" \
		     "info inferiors"

	    gdb_test "inferior 2" "Switching to inferior 2 .*"
	    set resume_unfollowed 1

	} elseif {$who == "child" && $detach == "on"} {

	    # Follow child / detach parent: the child is under debug and is
	    # the current inferior.  The parent is listed but is not under
	    # debug.
	    gdb_test "info inferiors" " 1 .*<null>.*\\* 2 .*process.*" \
		     "info inferiors"

	} elseif {$who == "child" && $detach == "off"} {

	    # Follow child / keep parent: two inferiors under debug, the
	    # child is the current inferior.
	    gdb_test "info inferiors" " 1 .*process.*\\* 2 .*process.*" \
		     "info inferiors"

	    gdb_test "inferior 1" "Switching to inferior 1 .*"
	    set resume_unfollowed 1
	}

	if {$resume_unfollowed == 1} {
	    if {$cmd == "next 2"} {

		gdb_continue_to_end "continue unfollowed inferior to end"

	    } elseif {$cmd == "continue"} {

		gdb_continue_to_breakpoint \
		    "continue unfollowed inferior to bp" \
		    ".* set breakpoint here.*"
	    }
	}
    }
}

proc catch_fork_child_follow {} {
    global gdb_prompt
    global srcfile

    set bp_after_fork [gdb_get_line_number "set breakpoint here"]

    gdb_test "catch fork" "Catchpoint \[0-9\]* \\(fork\\)" \
	"explicit child follow, set catch fork"

    # Verify that the catchpoint is mentioned in an "info breakpoints",
    # and further that the catchpoint mentions no process id.
    #
    set test_name "info shows catchpoint without pid"
    gdb_test_multiple "info breakpoints" "$test_name" {
	-re ".*catchpoint.*keep y.*fork\[\r\n\]+$gdb_prompt $" {
	    pass "$test_name"
	}
    }

    gdb_test "continue" \
	"Catchpoint \[0-9\]* \\(forked process \[0-9\]*\\),.*" \
	"explicit child follow, catch fork"

    # Verify that the catchpoint is mentioned in an "info breakpoints",
    # and further that the catchpoint managed to capture a process id.
    #
    set test_name "info shows catchpoint without pid"
    gdb_test_multiple "info breakpoints" "$test_name" {
	-re ".*catchpoint.*keep y.*fork, process.*$gdb_prompt $" {
	    pass "$test_name"
	}
    }

    gdb_test_no_output "set follow-fork child"

    gdb_test "tbreak ${srcfile}:$bp_after_fork" \
	"Temporary breakpoint.*, line $bp_after_fork.*" \
	"set follow-fork child, tbreak"

    set expected_re "Attaching after.* fork to.*Detaching after fork from"
    append expected_re ".* at .*$bp_after_fork.*"
    gdb_test "continue" $expected_re "set follow-fork child, hit tbreak"

    # The parent has been detached; allow time for any output it might
    # generate to arrive, so that output doesn't get confused with
    # any expected debugger output from a subsequent testpoint.
    #
    exec sleep 1

    gdb_test "delete breakpoints" \
	"" \
	"set follow-fork child, cleanup" \
	"Delete all breakpoints. \\(y or n\\) $" \
	"y"
}

proc catch_fork_unpatch_child {} {
    global gdb_prompt
    global srcfile

    set bp_exit [gdb_get_line_number "at exit"]

    gdb_test "break callee" "file .*$srcfile, line .*" \
	"unpatch child, break at callee"
    gdb_test "catch fork" "Catchpoint \[0-9\]* \\(fork\\)" \
	"unpatch child, set catch fork"

    gdb_test "continue" \
	"Catchpoint \[0-9\]* \\(forked process \[0-9\]*\\),.*" \
	"unpatch child, catch fork"

    # Delete all breakpoints and catchpoints.
    delete_breakpoints

    # Force $srcfile as the current GDB source can be in glibc sourcetree.
    gdb_test "break $srcfile:$bp_exit" \
	"Breakpoint .*file .*$srcfile, line .*" \
	"unpatch child, breakpoint at exit call"

    gdb_test_no_output "set follow-fork child" \
	"unpatch child, set follow-fork child"

    set test "unpatch child, unpatched parent breakpoints from child"
    gdb_test_multiple "continue" $test {
	-re "at exit.*$gdb_prompt $" {
	    pass "$test"
	}
	-re "SIGTRAP.*$gdb_prompt $" {
	    fail "$test"

	    # Explicitly kill this child, so we can continue gracefully
	    # with further testing...
	    send_gdb "kill\n"
	    gdb_expect {
		-re ".*Kill the program being debugged.*y or n. $" {
		    send_gdb "y\n"
		    gdb_expect -re "$gdb_prompt $" {}
		}
	    }
	}
    }
}

proc tcatch_fork_parent_follow {} {
    global gdb_prompt
    global srcfile

    set bp_after_fork [gdb_get_line_number "set breakpoint here"]

    gdb_test "catch fork" "Catchpoint \[0-9\]* \\(fork\\)" \
	"explicit parent follow, set tcatch fork"

# ??rehrauer: I don't yet know how to get the id of the tcatch
# via this script, so that I can add a -do list to it.  For now,
# do the follow stuff after the catch happens.

    gdb_test "continue" \
	"Catchpoint \[0-9\]* \\(forked process \[0-9\]*\\),.*" \
	"explicit parent follow, tcatch fork"

    gdb_test_no_output "set follow-fork parent"

    gdb_test "tbreak ${srcfile}:$bp_after_fork" \
	"Temporary breakpoint.*, line $bp_after_fork.*" \
	"set follow-fork parent, tbreak"

    gdb_test "continue" \
	"Detaching after fork from.* at .*$bp_after_fork.*" \
	"set follow-fork parent, hit tbreak"

    # The child has been detached; allow time for any output it might
    # generate to arrive, so that output doesn't get confused with
    # any expected debugger output from a subsequent testpoint.
    #
    exec sleep 1

    gdb_test "delete breakpoints" \
	"" \
	"set follow-fork parent, cleanup" \
	"Delete all breakpoints. \\(y or n\\) $" \
	"y"
}

proc do_fork_tests {} {
    global gdb_prompt
    global testfile

    # Verify that help is available for "set follow-fork-mode".
    #
    gdb_test "help set follow-fork-mode" \
	"Set debugger response to a program call of fork or vfork..*
A fork or vfork creates a new process.  follow-fork-mode can be:.*
.*parent  - the original process is debugged after a fork.*
.*child   - the new process is debugged after a fork.*
The unfollowed process will continue to run..*
By default, the debugger will follow the parent process..*" \
	"help set follow-fork"

    # Verify that we can set follow-fork-mode, using an abbreviation
    # for both the flag and its value.
    #
    gdb_test_no_output "set follow-fork ch"

    gdb_test "show follow-fork" \
	"Debugger response to a program call of fork or vfork is \"child\".*" \
	"set follow-fork, using abbreviations"

    # Verify that we cannot set follow-fork-mode to nonsense.
    #
    gdb_test "set follow-fork chork" "Undefined item: \"chork\".*" \
	"set follow-fork to nonsense is prohibited"

    gdb_test_no_output "set follow-fork parent" "reset parent"

    # Check that fork catchpoints are supported, as an indicator for whether
    # fork-following is supported.
    if [runto_main] then { check_fork_catchpoints }

    # Test the basic follow-fork functionality using all combinations of
    # values for follow-fork-mode and detach-on-fork, using either a
    # breakpoint or single-step to execute past the fork.
    #
    # The first loop should be sufficient to test the defaults.  There
    # is no need to test using the defaults in other permutations (e.g.
    # "default" "on", "parent" "default", etc.).
    foreach cmd {"next 2" "continue"} {
        test_follow_fork "default" "default" $cmd
    }

    # Now test all explicit permutations.
    foreach who {"parent" "child"} {
	foreach detach {"on" "off"} {
	    foreach cmd {"next 2" "continue"} {
		test_follow_fork $who $detach $cmd
	    }
	}
    }

    # Catchpoint tests.

    # Restart to eliminate any effects of the follow-fork tests.
    clean_restart $testfile
    gdb_test_no_output "set verbose"

    # Test the ability to catch a fork, specify that the child be
    # followed, and continue.  Make the catchpoint permanent.
    #
    if [runto_main] then { catch_fork_child_follow }

    # Test that parent breakpoints are successfully detached from the
    # child at fork time, even if the user removes them from the
    # breakpoints list after stopping at a fork catchpoint.
    if [runto_main] then { catch_fork_unpatch_child }

    # Test the ability to catch a fork, specify via a -do clause that
    # the parent be followed, and continue.  Make the catchpoint temporary.
    #
    if [runto_main] then { tcatch_fork_parent_follow }
}

# The "Detaching..." and "Attaching..." messages may be hidden by
# default.
gdb_test_no_output "set verbose"

# This is a test of gdb's ability to follow the parent, child or both
# parent and child of a Unix fork() system call.
#
do_fork_tests

return 0
Commit	Line	Data
32d0add0	1	# Copyright 1997-2015 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	#
4727d613 MK	23	if { ![istarget "hppa-hp-hpux"] && ![istarget "--linux*"]
4727d613 MK	24	&& ![istarget "--openbsd*"] } then {
2d4e0376 YQ	25	continue
2d4e0376 YQ	26	}
74cf1395	27
289f9037 TT	28	standard_testfile
	29
	30	if {[prepare_for_testing $testfile.exp $testfile $srcfile debug]} {
	31	untested $testfile.exp
	32	return -1
74cf1395 JM	33	}
74cf1395 JM	34
e85a822c DJ	35	proc check_fork_catchpoints {} {
	36	global gdb_prompt
	37
	38	# Verify that the system supports "catch fork".
	39	gdb_test "catch fork" "Catchpoint \[0-9\]* \\(fork\\)" "insert first fork catchpoint"
	40	set has_fork_catchpoints 0
	41	gdb_test_multiple "continue" "continue to first fork catchpoint" {
77b06cd7	42	-re ".Your system does not support this type\r\nof catchpoint.$gdb_prompt $" {
e85a822c DJ	43	unsupported "continue to first fork catchpoint"
	44	}
	45	-re ".Catchpoint.$gdb_prompt $" {
	46	set has_fork_catchpoints 1
	47	pass "continue to first fork catchpoint"
	48	}
	49	}
	50
	51	if {$has_fork_catchpoints == 0} {
	52	unsupported "fork catchpoints"
	53	return -code return
	54	}
	55	}
	56
a1aa2221 LM	57	# Test follow-fork to ensure that the correct process is followed, that
	58	# the followed process stops where it is expected to stop, that processes
	59	# are detached (or not) as expected, and that the inferior list has the
	60	# expected contents after following the fork. WHO is the argument to
	61	# the 'set follow-fork-mode' command, DETACH is the argument to the
	62	# 'set detach-on-fork' command, and CMD is the GDB command used to
	63	# execute the program past the fork. If the value of WHO or DETACH is
	64	# 'default', the corresponding GDB command is skipped for that test.
	65	# The value of CMD must be either 'next 2' or 'continue'.
	66	proc test_follow_fork { who detach cmd } {
a76e022a	67	global gdb_prompt
a1aa2221 LM	68	global srcfile
a1aa2221 LM	69	global testfile
a76e022a	70
a1aa2221	71	with_test_prefix "follow $who, detach $detach, command \"$cmd\"" {
a76e022a	72
a1aa2221 LM	73	# Start a new debugger session each time so defaults are legitimate.
a1aa2221 LM	74	clean_restart $testfile
a76e022a	75
a1aa2221 LM	76	if ![runto_main] {
	77	untested "could not run to main"
	78	return -1
	79	}
74cf1395	80
a1aa2221 LM	81	# The "Detaching..." and "Attaching..." messages may be hidden by
	82	# default.
	83	gdb_test_no_output "set verbose"
a76e022a	84
a1aa2221 LM	85	# Set follow-fork-mode if we aren't using the default.
	86	if {$who == "default"} {
	87	set who "parent"
	88	} else {
	89	gdb_test_no_output "set follow-fork $who"
	90	}
a76e022a	91
a1aa2221 LM	92	gdb_test "show follow-fork" \
	93	"Debugger response to a program call of fork or vfork is \"$who\"." \
	94	"show follow-fork"
a76e022a	95
a1aa2221 LM	96	# Set detach-on-fork mode if we aren't using the default.
	97	if {$detach == "default"} {
	98	set detach "on"
	99	} else {
	100	gdb_test_no_output "set detach-on-fork $detach"
	101	}
a76e022a	102
a1aa2221 LM	103	gdb_test "show detach-on-fork" \
	104	"Whether gdb will detach.* fork is $detach." \
	105	"show detach-on-fork"
	106
	107	# Set a breakpoint after the fork if we aren't single-stepping
	108	# past the fork.
	109	if {$cmd == "continue"} {
	110	set bp_after_fork [gdb_get_line_number "set breakpoint here"]
	111	gdb_test "break ${srcfile}:$bp_after_fork" \
	112	"Breakpoint., line $bp_after_fork." \
	113	"set breakpoint after fork"
	114	}
74cf1395	115
a1aa2221 LM	116	# Set up the output we expect to see after we run.
	117	set expected_re ""
	118	if {$who == "child"} {
6f259a23 DB	119	set expected_re "Attaching after.* fork to.*"
	120	if {$detach == "on"} {
	121	append expected_re "Detaching after fork from .*"
	122	}
	123	append expected_re "set breakpoint here.*"
a1aa2221 LM	124	} elseif {$who == "parent" && $detach == "on"} {
	125	set expected_re "Detaching after fork from .set breakpoint here."
	126	} else {
	127	set expected_re ".set breakpoint here."
	128	}
a76e022a	129
a1aa2221 LM	130	# Test running past and following the fork, using the parameters
	131	# set above.
	132	gdb_test $cmd $expected_re "$cmd past fork"
a76e022a	133
a1aa2221 LM	134	# Check that we have the inferiors arranged correctly after
	135	# following the fork.
	136	set resume_unfollowed 0
	137	if {$who == "parent" && $detach == "on"} {
a76e022a	138
a1aa2221 LM	139	# Follow parent / detach child: the only inferior is the parent.
	140	gdb_test "info inferiors" "\\* 1 .* process.*" \
	141	"info inferiors"
a76e022a	142
a1aa2221 LM	143	} elseif {$who == "parent" && $detach == "off"} {
	144
	145	# Follow parent / keep child: two inferiors under debug, the
	146	# parent is the current inferior.
7e0aa6aa	147	gdb_test "info inferiors" "\\* 1 .process. 2 .process." \
a1aa2221 LM	148	"info inferiors"
	149
	150	gdb_test "inferior 2" "Switching to inferior 2 .*"
	151	set resume_unfollowed 1
	152
	153	} elseif {$who == "child" && $detach == "on"} {
	154
	155	# Follow child / detach parent: the child is under debug and is
	156	# the current inferior. The parent is listed but is not under
	157	# debug.
7e0aa6aa	158	gdb_test "info inferiors" " 1 .<null>.\\* 2 .process." \
a1aa2221 LM	159	"info inferiors"
	160
	161	} elseif {$who == "child" && $detach == "off"} {
	162
	163	# Follow child / keep parent: two inferiors under debug, the
	164	# child is the current inferior.
7e0aa6aa	165	gdb_test "info inferiors" " 1 .process.\\* 2 .process." \
a1aa2221 LM	166	"info inferiors"
	167
	168	gdb_test "inferior 1" "Switching to inferior 1 .*"
	169	set resume_unfollowed 1
	170	}
	171
	172	if {$resume_unfollowed == 1} {
	173	if {$cmd == "next 2"} {
	174
	175	gdb_continue_to_end "continue unfollowed inferior to end"
	176
	177	} elseif {$cmd == "continue"} {
	178
	179	gdb_continue_to_breakpoint \
	180	"continue unfollowed inferior to bp" \
	181	".* set breakpoint here.*"
	182	}
	183	}
	184	}
74cf1395 JM	185	}
	186
	187	proc catch_fork_child_follow {} {
a76e022a MS	188	global gdb_prompt
	189	global srcfile
	190
	191	set bp_after_fork [gdb_get_line_number "set breakpoint here"]
	192
2c04da0d	193	gdb_test "catch fork" "Catchpoint \[0-9\]* \\(fork\\)" \
a76e022a MS	194	"explicit child follow, set catch fork"
	195
	196	# Verify that the catchpoint is mentioned in an "info breakpoints",
	197	# and further that the catchpoint mentions no process id.
	198	#
	199	set test_name "info shows catchpoint without pid"
	200	gdb_test_multiple "info breakpoints" "$test_name" {
	201	-re ".catchpoint.keep y.*fork\[\r\n\]+$gdb_prompt $" {
	202	pass "$test_name"
	203	}
	204	}
	205
	206	gdb_test "continue" \
2c04da0d	207	"Catchpoint \[0-9\]* \\(forked process \[0-9\]\\),." \
a76e022a MS	208	"explicit child follow, catch fork"
	209
	210	# Verify that the catchpoint is mentioned in an "info breakpoints",
	211	# and further that the catchpoint managed to capture a process id.
	212	#
	213	set test_name "info shows catchpoint without pid"
	214	gdb_test_multiple "info breakpoints" "$test_name" {
	215	-re ".catchpoint.keep y.fork, process.$gdb_prompt $" {
	216	pass "$test_name"
	217	}
	218	}
	219
	220	gdb_test_no_output "set follow-fork child"
	221
	222	gdb_test "tbreak ${srcfile}:$bp_after_fork" \
	223	"Temporary breakpoint., line $bp_after_fork." \
	224	"set follow-fork child, tbreak"
	225
6f259a23 DB	226	set expected_re "Attaching after.* fork to.*Detaching after fork from"
	227	append expected_re ".* at .$bp_after_fork."
	228	gdb_test "continue" $expected_re "set follow-fork child, hit tbreak"
a76e022a MS	229
	230	# The parent has been detached; allow time for any output it might
	231	# generate to arrive, so that output doesn't get confused with
	232	# any expected debugger output from a subsequent testpoint.
	233	#
	234	exec sleep 1
	235
	236	gdb_test "delete breakpoints" \
	237	"" \
	238	"set follow-fork child, cleanup" \
e9101ff5	239	"Delete all breakpoints. \\(y or n\\) $" \
a76e022a	240	"y"
74cf1395 JM	241	}
74cf1395 JM	242
b242c3c2	243	proc catch_fork_unpatch_child {} {
a76e022a MS	244	global gdb_prompt
	245	global srcfile
	246
	247	set bp_exit [gdb_get_line_number "at exit"]
	248
	249	gdb_test "break callee" "file .$srcfile, line ." \
	250	"unpatch child, break at callee"
	251	gdb_test "catch fork" "Catchpoint \[0-9\]* \\(fork\\)" \
	252	"unpatch child, set catch fork"
	253
	254	gdb_test "continue" \
2c04da0d	255	"Catchpoint \[0-9\]* \\(forked process \[0-9\]\\),." \
a76e022a MS	256	"unpatch child, catch fork"
	257
	258	# Delete all breakpoints and catchpoints.
	259	delete_breakpoints
	260
	261	# Force $srcfile as the current GDB source can be in glibc sourcetree.
	262	gdb_test "break $srcfile:$bp_exit" \
	263	"Breakpoint .file .$srcfile, line .*" \
	264	"unpatch child, breakpoint at exit call"
	265
27d3a1a2 MS	266	gdb_test_no_output "set follow-fork child" \
27d3a1a2 MS	267	"unpatch child, set follow-fork child"
a76e022a MS	268
	269	set test "unpatch child, unpatched parent breakpoints from child"
	270	gdb_test_multiple "continue" $test {
	271	-re "at exit.*$gdb_prompt $" {
	272	pass "$test"
	273	}
	274	-re "SIGTRAP.*$gdb_prompt $" {
	275	fail "$test"
	276
	277	# Explicitly kill this child, so we can continue gracefully
	278	# with further testing...
	279	send_gdb "kill\n"
	280	gdb_expect {
	281	-re ".Kill the program being debugged.y or n. $" {
	282	send_gdb "y\n"
	283	gdb_expect -re "$gdb_prompt $" {}
	284	}
	285	}
	286	}
	287	}
b242c3c2 PA	288	}
b242c3c2 PA	289
74cf1395	290	proc tcatch_fork_parent_follow {} {
a76e022a MS	291	global gdb_prompt
	292	global srcfile
	293
	294	set bp_after_fork [gdb_get_line_number "set breakpoint here"]
	295
2c04da0d	296	gdb_test "catch fork" "Catchpoint \[0-9\]* \\(fork\\)" \
a76e022a MS	297	"explicit parent follow, set tcatch fork"
a76e022a MS	298
74cf1395 JM	299	# ??rehrauer: I don't yet know how to get the id of the tcatch
	300	# via this script, so that I can add a -do list to it. For now,
	301	# do the follow stuff after the catch happens.
	302
2c04da0d UW	303	gdb_test "continue" \
2c04da0d UW	304	"Catchpoint \[0-9\]* \\(forked process \[0-9\]\\),." \
a76e022a MS	305	"explicit parent follow, tcatch fork"
	306
	307	gdb_test_no_output "set follow-fork parent"
	308
	309	gdb_test "tbreak ${srcfile}:$bp_after_fork" \
	310	"Temporary breakpoint., line $bp_after_fork." \
	311	"set follow-fork parent, tbreak"
	312
	313	gdb_test "continue" \
	314	"Detaching after fork from.* at .$bp_after_fork." \
	315	"set follow-fork parent, hit tbreak"
	316
	317	# The child has been detached; allow time for any output it might
	318	# generate to arrive, so that output doesn't get confused with
	319	# any expected debugger output from a subsequent testpoint.
	320	#
	321	exec sleep 1
	322
	323	gdb_test "delete breakpoints" \
	324	"" \
	325	"set follow-fork parent, cleanup" \
e9101ff5	326	"Delete all breakpoints. \\(y or n\\) $" \
a76e022a	327	"y"
74cf1395 JM	328	}
	329
	330	proc do_fork_tests {} {
a76e022a	331	global gdb_prompt
a1aa2221	332	global testfile
74cf1395	333
a76e022a MS	334	# Verify that help is available for "set follow-fork-mode".
	335	#
	336	gdb_test "help set follow-fork-mode" \
	337	"Set debugger response to a program call of fork or vfork..*
74cf1395 JM	338	A fork or vfork creates a new process. follow-fork-mode can be:.*
	339	.parent - the original process is debugged after a fork.
	340	.child - the new process is debugged after a fork.
ef04f396	341	The unfollowed process will continue to run..*
a76e022a MS	342	By default, the debugger will follow the parent process..*" \
	343	"help set follow-fork"
	344
	345	# Verify that we can set follow-fork-mode, using an abbreviation
	346	# for both the flag and its value.
	347	#
	348	gdb_test_no_output "set follow-fork ch"
	349
	350	gdb_test "show follow-fork" \
	351	"Debugger response to a program call of fork or vfork is \"child\".*" \
	352	"set follow-fork, using abbreviations"
	353
	354	# Verify that we cannot set follow-fork-mode to nonsense.
	355	#
	356	gdb_test "set follow-fork chork" "Undefined item: \"chork\".*" \
	357	"set follow-fork to nonsense is prohibited"
	358
	359	gdb_test_no_output "set follow-fork parent" "reset parent"
	360
	361	# Check that fork catchpoints are supported, as an indicator for whether
	362	# fork-following is supported.
	363	if [runto_main] then { check_fork_catchpoints }
	364
a1aa2221 LM	365	# Test the basic follow-fork functionality using all combinations of
	366	# values for follow-fork-mode and detach-on-fork, using either a
	367	# breakpoint or single-step to execute past the fork.
a76e022a	368	#
a1aa2221 LM	369	# The first loop should be sufficient to test the defaults. There
	370	# is no need to test using the defaults in other permutations (e.g.
	371	# "default" "on", "parent" "default", etc.).
	372	foreach cmd {"next 2" "continue"} {
	373	test_follow_fork "default" "default" $cmd
	374	}
a76e022a	375
a1aa2221 LM	376	# Now test all explicit permutations.
	377	foreach who {"parent" "child"} {
	378	foreach detach {"on" "off"} {
	379	foreach cmd {"next 2" "continue"} {
	380	test_follow_fork $who $detach $cmd
	381	}
	382	}
	383	}
a76e022a	384
a1aa2221	385	# Catchpoint tests.
a76e022a	386
a1aa2221 LM	387	# Restart to eliminate any effects of the follow-fork tests.
	388	clean_restart $testfile
	389	gdb_test_no_output "set verbose"
a76e022a MS	390
	391	# Test the ability to catch a fork, specify that the child be
	392	# followed, and continue. Make the catchpoint permanent.
	393	#
	394	if [runto_main] then { catch_fork_child_follow }
	395
	396	# Test that parent breakpoints are successfully detached from the
	397	# child at fork time, even if the user removes them from the
	398	# breakpoints list after stopping at a fork catchpoint.
	399	if [runto_main] then { catch_fork_unpatch_child }
	400
	401	# Test the ability to catch a fork, specify via a -do clause that
	402	# the parent be followed, and continue. Make the catchpoint temporary.
	403	#
	404	if [runto_main] then { tcatch_fork_parent_follow }
74cf1395 JM	405	}
74cf1395 JM	406
e85a822c DJ	407	# The "Detaching..." and "Attaching..." messages may be hidden by
e85a822c DJ	408	# default.
27d3a1a2	409	gdb_test_no_output "set verbose"
74cf1395 JM	410
	411	# This is a test of gdb's ability to follow the parent, child or both
	412	# parent and child of a Unix fork() system call.
	413	#
	414	do_fork_tests
	415
	416	return 0