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

#   Copyright 1997-2018 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/>.

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

standard_testfile

if {[prepare_for_testing "failed to prepare" $testfile $srcfile debug]} {
    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
e2882c85	1	# Copyright 1997-2018 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
2d4e0376 YQ	16	# Until "set follow-fork-mode" and "catch fork" are implemented on
	17	# other targets...
	18	#
3ca22649	19	if { ![istarget "--linux"] && ![istarget "--openbsd"] } then {
2d4e0376 YQ	20	continue
2d4e0376 YQ	21	}
74cf1395	22
289f9037 TT	23	standard_testfile
289f9037 TT	24
5b362f04	25	if {[prepare_for_testing "failed to prepare" $testfile $srcfile debug]} {
289f9037	26	return -1
74cf1395 JM	27	}
74cf1395 JM	28
e85a822c DJ	29	proc check_fork_catchpoints {} {
	30	global gdb_prompt
	31
	32	# Verify that the system supports "catch fork".
	33	gdb_test "catch fork" "Catchpoint \[0-9\]* \\(fork\\)" "insert first fork catchpoint"
	34	set has_fork_catchpoints 0
	35	gdb_test_multiple "continue" "continue to first fork catchpoint" {
77b06cd7	36	-re ".Your system does not support this type\r\nof catchpoint.$gdb_prompt $" {
e85a822c DJ	37	unsupported "continue to first fork catchpoint"
	38	}
	39	-re ".Catchpoint.$gdb_prompt $" {
	40	set has_fork_catchpoints 1
	41	pass "continue to first fork catchpoint"
	42	}
	43	}
	44
	45	if {$has_fork_catchpoints == 0} {
	46	unsupported "fork catchpoints"
	47	return -code return
	48	}
	49	}
	50
a1aa2221 LM	51	# Test follow-fork to ensure that the correct process is followed, that
	52	# the followed process stops where it is expected to stop, that processes
	53	# are detached (or not) as expected, and that the inferior list has the
	54	# expected contents after following the fork. WHO is the argument to
	55	# the 'set follow-fork-mode' command, DETACH is the argument to the
	56	# 'set detach-on-fork' command, and CMD is the GDB command used to
	57	# execute the program past the fork. If the value of WHO or DETACH is
	58	# 'default', the corresponding GDB command is skipped for that test.
	59	# The value of CMD must be either 'next 2' or 'continue'.
	60	proc test_follow_fork { who detach cmd } {
a76e022a	61	global gdb_prompt
a1aa2221 LM	62	global srcfile
a1aa2221 LM	63	global testfile
a76e022a	64
a1aa2221	65	with_test_prefix "follow $who, detach $detach, command \"$cmd\"" {
a76e022a	66
a1aa2221 LM	67	# Start a new debugger session each time so defaults are legitimate.
a1aa2221 LM	68	clean_restart $testfile
a76e022a	69
a1aa2221 LM	70	if ![runto_main] {
	71	untested "could not run to main"
	72	return -1
	73	}
74cf1395	74
a1aa2221 LM	75	# The "Detaching..." and "Attaching..." messages may be hidden by
	76	# default.
	77	gdb_test_no_output "set verbose"
a76e022a	78
a1aa2221 LM	79	# Set follow-fork-mode if we aren't using the default.
	80	if {$who == "default"} {
	81	set who "parent"
	82	} else {
	83	gdb_test_no_output "set follow-fork $who"
	84	}
a76e022a	85
a1aa2221 LM	86	gdb_test "show follow-fork" \
	87	"Debugger response to a program call of fork or vfork is \"$who\"." \
	88	"show follow-fork"
a76e022a	89
a1aa2221 LM	90	# Set detach-on-fork mode if we aren't using the default.
	91	if {$detach == "default"} {
	92	set detach "on"
	93	} else {
	94	gdb_test_no_output "set detach-on-fork $detach"
	95	}
a76e022a	96
a1aa2221 LM	97	gdb_test "show detach-on-fork" \
	98	"Whether gdb will detach.* fork is $detach." \
	99	"show detach-on-fork"
	100
	101	# Set a breakpoint after the fork if we aren't single-stepping
	102	# past the fork.
	103	if {$cmd == "continue"} {
	104	set bp_after_fork [gdb_get_line_number "set breakpoint here"]
	105	gdb_test "break ${srcfile}:$bp_after_fork" \
	106	"Breakpoint., line $bp_after_fork." \
	107	"set breakpoint after fork"
	108	}
74cf1395	109
a1aa2221 LM	110	# Set up the output we expect to see after we run.
	111	set expected_re ""
	112	if {$who == "child"} {
6f259a23 DB	113	set expected_re "Attaching after.* fork to.*"
	114	if {$detach == "on"} {
	115	append expected_re "Detaching after fork from .*"
	116	}
	117	append expected_re "set breakpoint here.*"
a1aa2221 LM	118	} elseif {$who == "parent" && $detach == "on"} {
	119	set expected_re "Detaching after fork from .set breakpoint here."
	120	} else {
	121	set expected_re ".set breakpoint here."
	122	}
a76e022a	123
a1aa2221 LM	124	# Test running past and following the fork, using the parameters
	125	# set above.
	126	gdb_test $cmd $expected_re "$cmd past fork"
a76e022a	127
a1aa2221 LM	128	# Check that we have the inferiors arranged correctly after
	129	# following the fork.
	130	set resume_unfollowed 0
	131	if {$who == "parent" && $detach == "on"} {
a76e022a	132
a1aa2221 LM	133	# Follow parent / detach child: the only inferior is the parent.
	134	gdb_test "info inferiors" "\\* 1 .* process.*" \
	135	"info inferiors"
a76e022a	136
a1aa2221 LM	137	} elseif {$who == "parent" && $detach == "off"} {
	138
	139	# Follow parent / keep child: two inferiors under debug, the
	140	# parent is the current inferior.
b05b1202	141	gdb_test "info inferiors" "\\* 1 .process. 2 .process." \
a1aa2221 LM	142	"info inferiors"
	143
	144	gdb_test "inferior 2" "Switching to inferior 2 .*"
	145	set resume_unfollowed 1
	146
	147	} elseif {$who == "child" && $detach == "on"} {
	148
	149	# Follow child / detach parent: the child is under debug and is
	150	# the current inferior. The parent is listed but is not under
	151	# debug.
b05b1202	152	gdb_test "info inferiors" " 1 .<null>.\\* 2 .process." \
a1aa2221 LM	153	"info inferiors"
	154
	155	} elseif {$who == "child" && $detach == "off"} {
	156
	157	# Follow child / keep parent: two inferiors under debug, the
	158	# child is the current inferior.
b05b1202	159	gdb_test "info inferiors" " 1 .process.\\* 2 .process." \
a1aa2221 LM	160	"info inferiors"
	161
	162	gdb_test "inferior 1" "Switching to inferior 1 .*"
	163	set resume_unfollowed 1
	164	}
	165
	166	if {$resume_unfollowed == 1} {
	167	if {$cmd == "next 2"} {
	168
	169	gdb_continue_to_end "continue unfollowed inferior to end"
	170
	171	} elseif {$cmd == "continue"} {
	172
	173	gdb_continue_to_breakpoint \
	174	"continue unfollowed inferior to bp" \
	175	".* set breakpoint here.*"
	176	}
	177	}
	178	}
74cf1395 JM	179	}
	180
	181	proc catch_fork_child_follow {} {
a76e022a MS	182	global gdb_prompt
	183	global srcfile
	184
	185	set bp_after_fork [gdb_get_line_number "set breakpoint here"]
	186
2c04da0d	187	gdb_test "catch fork" "Catchpoint \[0-9\]* \\(fork\\)" \
a76e022a MS	188	"explicit child follow, set catch fork"
	189
	190	# Verify that the catchpoint is mentioned in an "info breakpoints",
	191	# and further that the catchpoint mentions no process id.
	192	#
	193	set test_name "info shows catchpoint without pid"
	194	gdb_test_multiple "info breakpoints" "$test_name" {
	195	-re ".catchpoint.keep y.*fork\[\r\n\]+$gdb_prompt $" {
	196	pass "$test_name"
	197	}
	198	}
	199
	200	gdb_test "continue" \
2c04da0d	201	"Catchpoint \[0-9\]* \\(forked process \[0-9\]\\),." \
a76e022a MS	202	"explicit child follow, catch fork"
	203
	204	# Verify that the catchpoint is mentioned in an "info breakpoints",
	205	# and further that the catchpoint managed to capture a process id.
	206	#
	207	set test_name "info shows catchpoint without pid"
	208	gdb_test_multiple "info breakpoints" "$test_name" {
	209	-re ".catchpoint.keep y.fork, process.$gdb_prompt $" {
	210	pass "$test_name"
	211	}
	212	}
	213
	214	gdb_test_no_output "set follow-fork child"
	215
	216	gdb_test "tbreak ${srcfile}:$bp_after_fork" \
	217	"Temporary breakpoint., line $bp_after_fork." \
	218	"set follow-fork child, tbreak"
	219
6f259a23 DB	220	set expected_re "Attaching after.* fork to.*Detaching after fork from"
	221	append expected_re ".* at .$bp_after_fork."
	222	gdb_test "continue" $expected_re "set follow-fork child, hit tbreak"
a76e022a MS	223
	224	# The parent has been detached; allow time for any output it might
	225	# generate to arrive, so that output doesn't get confused with
	226	# any expected debugger output from a subsequent testpoint.
	227	#
	228	exec sleep 1
	229
	230	gdb_test "delete breakpoints" \
	231	"" \
	232	"set follow-fork child, cleanup" \
e9101ff5	233	"Delete all breakpoints. \\(y or n\\) $" \
a76e022a	234	"y"
74cf1395 JM	235	}
74cf1395 JM	236
b242c3c2	237	proc catch_fork_unpatch_child {} {
a76e022a MS	238	global gdb_prompt
	239	global srcfile
	240
	241	set bp_exit [gdb_get_line_number "at exit"]
	242
	243	gdb_test "break callee" "file .$srcfile, line ." \
	244	"unpatch child, break at callee"
	245	gdb_test "catch fork" "Catchpoint \[0-9\]* \\(fork\\)" \
	246	"unpatch child, set catch fork"
	247
	248	gdb_test "continue" \
2c04da0d	249	"Catchpoint \[0-9\]* \\(forked process \[0-9\]\\),." \
a76e022a MS	250	"unpatch child, catch fork"
	251
	252	# Delete all breakpoints and catchpoints.
	253	delete_breakpoints
	254
	255	# Force $srcfile as the current GDB source can be in glibc sourcetree.
	256	gdb_test "break $srcfile:$bp_exit" \
	257	"Breakpoint .file .$srcfile, line .*" \
	258	"unpatch child, breakpoint at exit call"
	259
27d3a1a2 MS	260	gdb_test_no_output "set follow-fork child" \
27d3a1a2 MS	261	"unpatch child, set follow-fork child"
a76e022a MS	262
	263	set test "unpatch child, unpatched parent breakpoints from child"
	264	gdb_test_multiple "continue" $test {
	265	-re "at exit.*$gdb_prompt $" {
	266	pass "$test"
	267	}
	268	-re "SIGTRAP.*$gdb_prompt $" {
	269	fail "$test"
	270
	271	# Explicitly kill this child, so we can continue gracefully
	272	# with further testing...
	273	send_gdb "kill\n"
	274	gdb_expect {
	275	-re ".Kill the program being debugged.y or n. $" {
	276	send_gdb "y\n"
	277	gdb_expect -re "$gdb_prompt $" {}
	278	}
	279	}
	280	}
	281	}
b242c3c2 PA	282	}
b242c3c2 PA	283
74cf1395	284	proc tcatch_fork_parent_follow {} {
a76e022a MS	285	global gdb_prompt
	286	global srcfile
	287
	288	set bp_after_fork [gdb_get_line_number "set breakpoint here"]
	289
2c04da0d	290	gdb_test "catch fork" "Catchpoint \[0-9\]* \\(fork\\)" \
a76e022a MS	291	"explicit parent follow, set tcatch fork"
a76e022a MS	292
74cf1395 JM	293	# ??rehrauer: I don't yet know how to get the id of the tcatch
	294	# via this script, so that I can add a -do list to it. For now,
	295	# do the follow stuff after the catch happens.
	296
2c04da0d UW	297	gdb_test "continue" \
2c04da0d UW	298	"Catchpoint \[0-9\]* \\(forked process \[0-9\]\\),." \
a76e022a MS	299	"explicit parent follow, tcatch fork"
	300
	301	gdb_test_no_output "set follow-fork parent"
	302
	303	gdb_test "tbreak ${srcfile}:$bp_after_fork" \
	304	"Temporary breakpoint., line $bp_after_fork." \
	305	"set follow-fork parent, tbreak"
	306
	307	gdb_test "continue" \
	308	"Detaching after fork from.* at .$bp_after_fork." \
	309	"set follow-fork parent, hit tbreak"
	310
	311	# The child has been detached; allow time for any output it might
	312	# generate to arrive, so that output doesn't get confused with
	313	# any expected debugger output from a subsequent testpoint.
	314	#
	315	exec sleep 1
	316
	317	gdb_test "delete breakpoints" \
	318	"" \
	319	"set follow-fork parent, cleanup" \
e9101ff5	320	"Delete all breakpoints. \\(y or n\\) $" \
a76e022a	321	"y"
74cf1395 JM	322	}
	323
	324	proc do_fork_tests {} {
a76e022a	325	global gdb_prompt
a1aa2221	326	global testfile
74cf1395	327
a76e022a MS	328	# Verify that help is available for "set follow-fork-mode".
	329	#
	330	gdb_test "help set follow-fork-mode" \
	331	"Set debugger response to a program call of fork or vfork..*
74cf1395 JM	332	A fork or vfork creates a new process. follow-fork-mode can be:.*
	333	.parent - the original process is debugged after a fork.
	334	.child - the new process is debugged after a fork.
ef04f396	335	The unfollowed process will continue to run..*
a76e022a MS	336	By default, the debugger will follow the parent process..*" \
	337	"help set follow-fork"
	338
	339	# Verify that we can set follow-fork-mode, using an abbreviation
	340	# for both the flag and its value.
	341	#
	342	gdb_test_no_output "set follow-fork ch"
	343
	344	gdb_test "show follow-fork" \
	345	"Debugger response to a program call of fork or vfork is \"child\".*" \
	346	"set follow-fork, using abbreviations"
	347
	348	# Verify that we cannot set follow-fork-mode to nonsense.
	349	#
	350	gdb_test "set follow-fork chork" "Undefined item: \"chork\".*" \
	351	"set follow-fork to nonsense is prohibited"
	352
	353	gdb_test_no_output "set follow-fork parent" "reset parent"
	354
	355	# Check that fork catchpoints are supported, as an indicator for whether
	356	# fork-following is supported.
	357	if [runto_main] then { check_fork_catchpoints }
	358
a1aa2221 LM	359	# Test the basic follow-fork functionality using all combinations of
	360	# values for follow-fork-mode and detach-on-fork, using either a
	361	# breakpoint or single-step to execute past the fork.
a76e022a	362	#
a1aa2221 LM	363	# The first loop should be sufficient to test the defaults. There
	364	# is no need to test using the defaults in other permutations (e.g.
	365	# "default" "on", "parent" "default", etc.).
	366	foreach cmd {"next 2" "continue"} {
	367	test_follow_fork "default" "default" $cmd
	368	}
a76e022a	369
a1aa2221 LM	370	# Now test all explicit permutations.
	371	foreach who {"parent" "child"} {
	372	foreach detach {"on" "off"} {
	373	foreach cmd {"next 2" "continue"} {
	374	test_follow_fork $who $detach $cmd
	375	}
	376	}
	377	}
a76e022a	378
a1aa2221	379	# Catchpoint tests.
a76e022a	380
a1aa2221 LM	381	# Restart to eliminate any effects of the follow-fork tests.
	382	clean_restart $testfile
	383	gdb_test_no_output "set verbose"
a76e022a MS	384
	385	# Test the ability to catch a fork, specify that the child be
	386	# followed, and continue. Make the catchpoint permanent.
	387	#
	388	if [runto_main] then { catch_fork_child_follow }
	389
	390	# Test that parent breakpoints are successfully detached from the
	391	# child at fork time, even if the user removes them from the
	392	# breakpoints list after stopping at a fork catchpoint.
	393	if [runto_main] then { catch_fork_unpatch_child }
	394
	395	# Test the ability to catch a fork, specify via a -do clause that
	396	# the parent be followed, and continue. Make the catchpoint temporary.
	397	#
	398	if [runto_main] then { tcatch_fork_parent_follow }
74cf1395 JM	399	}
74cf1395 JM	400
e85a822c DJ	401	# The "Detaching..." and "Attaching..." messages may be hidden by
e85a822c DJ	402	# default.
27d3a1a2	403	gdb_test_no_output "set verbose"
74cf1395 JM	404
	405	# This is a test of gdb's ability to follow the parent, child or both
	406	# parent and child of a Unix fork() system call.
	407	#
	408	do_fork_tests
	409
	410	return 0