[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/>.

# 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
2d4e0376 YQ	16	# Until "set follow-fork-mode" and "catch fork" are implemented on
	17	# other targets...
	18	#
4727d613 MK	19	if { ![istarget "hppa-hp-hpux"] && ![istarget "--linux*"]
4727d613 MK	20	&& ![istarget "--openbsd*"] } then {
2d4e0376 YQ	21	continue
2d4e0376 YQ	22	}
74cf1395	23
289f9037 TT	24	standard_testfile
	25
	26	if {[prepare_for_testing $testfile.exp $testfile $srcfile debug]} {
	27	untested $testfile.exp
	28	return -1
74cf1395 JM	29	}
74cf1395 JM	30
e85a822c DJ	31	proc check_fork_catchpoints {} {
	32	global gdb_prompt
	33
	34	# Verify that the system supports "catch fork".
	35	gdb_test "catch fork" "Catchpoint \[0-9\]* \\(fork\\)" "insert first fork catchpoint"
	36	set has_fork_catchpoints 0
	37	gdb_test_multiple "continue" "continue to first fork catchpoint" {
77b06cd7	38	-re ".Your system does not support this type\r\nof catchpoint.$gdb_prompt $" {
e85a822c DJ	39	unsupported "continue to first fork catchpoint"
	40	}
	41	-re ".Catchpoint.$gdb_prompt $" {
	42	set has_fork_catchpoints 1
	43	pass "continue to first fork catchpoint"
	44	}
	45	}
	46
	47	if {$has_fork_catchpoints == 0} {
	48	unsupported "fork catchpoints"
	49	return -code return
	50	}
	51	}
	52
a1aa2221 LM	53	# Test follow-fork to ensure that the correct process is followed, that
	54	# the followed process stops where it is expected to stop, that processes
	55	# are detached (or not) as expected, and that the inferior list has the
	56	# expected contents after following the fork. WHO is the argument to
	57	# the 'set follow-fork-mode' command, DETACH is the argument to the
	58	# 'set detach-on-fork' command, and CMD is the GDB command used to
	59	# execute the program past the fork. If the value of WHO or DETACH is
	60	# 'default', the corresponding GDB command is skipped for that test.
	61	# The value of CMD must be either 'next 2' or 'continue'.
	62	proc test_follow_fork { who detach cmd } {
a76e022a	63	global gdb_prompt
a1aa2221 LM	64	global srcfile
a1aa2221 LM	65	global testfile
a76e022a	66
a1aa2221	67	with_test_prefix "follow $who, detach $detach, command \"$cmd\"" {
a76e022a	68
a1aa2221 LM	69	# Start a new debugger session each time so defaults are legitimate.
a1aa2221 LM	70	clean_restart $testfile
a76e022a	71
a1aa2221 LM	72	if ![runto_main] {
	73	untested "could not run to main"
	74	return -1
	75	}
74cf1395	76
a1aa2221 LM	77	# The "Detaching..." and "Attaching..." messages may be hidden by
	78	# default.
	79	gdb_test_no_output "set verbose"
a76e022a	80
a1aa2221 LM	81	# Set follow-fork-mode if we aren't using the default.
	82	if {$who == "default"} {
	83	set who "parent"
	84	} else {
	85	gdb_test_no_output "set follow-fork $who"
	86	}
a76e022a	87
a1aa2221 LM	88	gdb_test "show follow-fork" \
	89	"Debugger response to a program call of fork or vfork is \"$who\"." \
	90	"show follow-fork"
a76e022a	91
a1aa2221 LM	92	# Set detach-on-fork mode if we aren't using the default.
	93	if {$detach == "default"} {
	94	set detach "on"
	95	} else {
	96	gdb_test_no_output "set detach-on-fork $detach"
	97	}
a76e022a	98
a1aa2221 LM	99	gdb_test "show detach-on-fork" \
	100	"Whether gdb will detach.* fork is $detach." \
	101	"show detach-on-fork"
	102
	103	# Set a breakpoint after the fork if we aren't single-stepping
	104	# past the fork.
	105	if {$cmd == "continue"} {
	106	set bp_after_fork [gdb_get_line_number "set breakpoint here"]
	107	gdb_test "break ${srcfile}:$bp_after_fork" \
	108	"Breakpoint., line $bp_after_fork." \
	109	"set breakpoint after fork"
	110	}
74cf1395	111
a1aa2221 LM	112	# Set up the output we expect to see after we run.
	113	set expected_re ""
	114	if {$who == "child"} {
6f259a23 DB	115	set expected_re "Attaching after.* fork to.*"
	116	if {$detach == "on"} {
	117	append expected_re "Detaching after fork from .*"
	118	}
	119	append expected_re "set breakpoint here.*"
a1aa2221 LM	120	} elseif {$who == "parent" && $detach == "on"} {
	121	set expected_re "Detaching after fork from .set breakpoint here."
	122	} else {
	123	set expected_re ".set breakpoint here."
	124	}
a76e022a	125
a1aa2221 LM	126	# Test running past and following the fork, using the parameters
	127	# set above.
	128	gdb_test $cmd $expected_re "$cmd past fork"
a76e022a	129
a1aa2221 LM	130	# Check that we have the inferiors arranged correctly after
	131	# following the fork.
	132	set resume_unfollowed 0
	133	if {$who == "parent" && $detach == "on"} {
a76e022a	134
a1aa2221 LM	135	# Follow parent / detach child: the only inferior is the parent.
	136	gdb_test "info inferiors" "\\* 1 .* process.*" \
	137	"info inferiors"
a76e022a	138
a1aa2221 LM	139	} elseif {$who == "parent" && $detach == "off"} {
	140
	141	# Follow parent / keep child: two inferiors under debug, the
	142	# parent is the current inferior.
7e0aa6aa	143	gdb_test "info inferiors" "\\* 1 .process. 2 .process." \
a1aa2221 LM	144	"info inferiors"
	145
	146	gdb_test "inferior 2" "Switching to inferior 2 .*"
	147	set resume_unfollowed 1
	148
	149	} elseif {$who == "child" && $detach == "on"} {
	150
	151	# Follow child / detach parent: the child is under debug and is
	152	# the current inferior. The parent is listed but is not under
	153	# debug.
7e0aa6aa	154	gdb_test "info inferiors" " 1 .<null>.\\* 2 .process." \
a1aa2221 LM	155	"info inferiors"
	156
	157	} elseif {$who == "child" && $detach == "off"} {
	158
	159	# Follow child / keep parent: two inferiors under debug, the
	160	# child is the current inferior.
7e0aa6aa	161	gdb_test "info inferiors" " 1 .process.\\* 2 .process." \
a1aa2221 LM	162	"info inferiors"
	163
	164	gdb_test "inferior 1" "Switching to inferior 1 .*"
	165	set resume_unfollowed 1
	166	}
	167
	168	if {$resume_unfollowed == 1} {
	169	if {$cmd == "next 2"} {
	170
	171	gdb_continue_to_end "continue unfollowed inferior to end"
	172
	173	} elseif {$cmd == "continue"} {
	174
	175	gdb_continue_to_breakpoint \
	176	"continue unfollowed inferior to bp" \
	177	".* set breakpoint here.*"
	178	}
	179	}
	180	}
74cf1395 JM	181	}
	182
	183	proc catch_fork_child_follow {} {
a76e022a MS	184	global gdb_prompt
	185	global srcfile
	186
	187	set bp_after_fork [gdb_get_line_number "set breakpoint here"]
	188
2c04da0d	189	gdb_test "catch fork" "Catchpoint \[0-9\]* \\(fork\\)" \
a76e022a MS	190	"explicit child follow, set catch fork"
	191
	192	# Verify that the catchpoint is mentioned in an "info breakpoints",
	193	# and further that the catchpoint mentions no process id.
	194	#
	195	set test_name "info shows catchpoint without pid"
	196	gdb_test_multiple "info breakpoints" "$test_name" {
	197	-re ".catchpoint.keep y.*fork\[\r\n\]+$gdb_prompt $" {
	198	pass "$test_name"
	199	}
	200	}
	201
	202	gdb_test "continue" \
2c04da0d	203	"Catchpoint \[0-9\]* \\(forked process \[0-9\]\\),." \
a76e022a MS	204	"explicit child follow, catch fork"
	205
	206	# Verify that the catchpoint is mentioned in an "info breakpoints",
	207	# and further that the catchpoint managed to capture a process id.
	208	#
	209	set test_name "info shows catchpoint without pid"
	210	gdb_test_multiple "info breakpoints" "$test_name" {
	211	-re ".catchpoint.keep y.fork, process.$gdb_prompt $" {
	212	pass "$test_name"
	213	}
	214	}
	215
	216	gdb_test_no_output "set follow-fork child"
	217
	218	gdb_test "tbreak ${srcfile}:$bp_after_fork" \
	219	"Temporary breakpoint., line $bp_after_fork." \
	220	"set follow-fork child, tbreak"
	221
6f259a23 DB	222	set expected_re "Attaching after.* fork to.*Detaching after fork from"
	223	append expected_re ".* at .$bp_after_fork."
	224	gdb_test "continue" $expected_re "set follow-fork child, hit tbreak"
a76e022a MS	225
	226	# The parent has been detached; allow time for any output it might
	227	# generate to arrive, so that output doesn't get confused with
	228	# any expected debugger output from a subsequent testpoint.
	229	#
	230	exec sleep 1
	231
	232	gdb_test "delete breakpoints" \
	233	"" \
	234	"set follow-fork child, cleanup" \
e9101ff5	235	"Delete all breakpoints. \\(y or n\\) $" \
a76e022a	236	"y"
74cf1395 JM	237	}
74cf1395 JM	238
b242c3c2	239	proc catch_fork_unpatch_child {} {
a76e022a MS	240	global gdb_prompt
	241	global srcfile
	242
	243	set bp_exit [gdb_get_line_number "at exit"]
	244
	245	gdb_test "break callee" "file .$srcfile, line ." \
	246	"unpatch child, break at callee"
	247	gdb_test "catch fork" "Catchpoint \[0-9\]* \\(fork\\)" \
	248	"unpatch child, set catch fork"
	249
	250	gdb_test "continue" \
2c04da0d	251	"Catchpoint \[0-9\]* \\(forked process \[0-9\]\\),." \
a76e022a MS	252	"unpatch child, catch fork"
	253
	254	# Delete all breakpoints and catchpoints.
	255	delete_breakpoints
	256
	257	# Force $srcfile as the current GDB source can be in glibc sourcetree.
	258	gdb_test "break $srcfile:$bp_exit" \
	259	"Breakpoint .file .$srcfile, line .*" \
	260	"unpatch child, breakpoint at exit call"
	261
27d3a1a2 MS	262	gdb_test_no_output "set follow-fork child" \
27d3a1a2 MS	263	"unpatch child, set follow-fork child"
a76e022a MS	264
	265	set test "unpatch child, unpatched parent breakpoints from child"
	266	gdb_test_multiple "continue" $test {
	267	-re "at exit.*$gdb_prompt $" {
	268	pass "$test"
	269	}
	270	-re "SIGTRAP.*$gdb_prompt $" {
	271	fail "$test"
	272
	273	# Explicitly kill this child, so we can continue gracefully
	274	# with further testing...
	275	send_gdb "kill\n"
	276	gdb_expect {
	277	-re ".Kill the program being debugged.y or n. $" {
	278	send_gdb "y\n"
	279	gdb_expect -re "$gdb_prompt $" {}
	280	}
	281	}
	282	}
	283	}
b242c3c2 PA	284	}
b242c3c2 PA	285
74cf1395	286	proc tcatch_fork_parent_follow {} {
a76e022a MS	287	global gdb_prompt
	288	global srcfile
	289
	290	set bp_after_fork [gdb_get_line_number "set breakpoint here"]
	291
2c04da0d	292	gdb_test "catch fork" "Catchpoint \[0-9\]* \\(fork\\)" \
a76e022a MS	293	"explicit parent follow, set tcatch fork"
a76e022a MS	294
74cf1395 JM	295	# ??rehrauer: I don't yet know how to get the id of the tcatch
	296	# via this script, so that I can add a -do list to it. For now,
	297	# do the follow stuff after the catch happens.
	298
2c04da0d UW	299	gdb_test "continue" \
2c04da0d UW	300	"Catchpoint \[0-9\]* \\(forked process \[0-9\]\\),." \
a76e022a MS	301	"explicit parent follow, tcatch fork"
	302
	303	gdb_test_no_output "set follow-fork parent"
	304
	305	gdb_test "tbreak ${srcfile}:$bp_after_fork" \
	306	"Temporary breakpoint., line $bp_after_fork." \
	307	"set follow-fork parent, tbreak"
	308
	309	gdb_test "continue" \
	310	"Detaching after fork from.* at .$bp_after_fork." \
	311	"set follow-fork parent, hit tbreak"
	312
	313	# The child has been detached; allow time for any output it might
	314	# generate to arrive, so that output doesn't get confused with
	315	# any expected debugger output from a subsequent testpoint.
	316	#
	317	exec sleep 1
	318
	319	gdb_test "delete breakpoints" \
	320	"" \
	321	"set follow-fork parent, cleanup" \
e9101ff5	322	"Delete all breakpoints. \\(y or n\\) $" \
a76e022a	323	"y"
74cf1395 JM	324	}
	325
	326	proc do_fork_tests {} {
a76e022a	327	global gdb_prompt
a1aa2221	328	global testfile
74cf1395	329
a76e022a MS	330	# Verify that help is available for "set follow-fork-mode".
	331	#
	332	gdb_test "help set follow-fork-mode" \
	333	"Set debugger response to a program call of fork or vfork..*
74cf1395 JM	334	A fork or vfork creates a new process. follow-fork-mode can be:.*
	335	.parent - the original process is debugged after a fork.
	336	.child - the new process is debugged after a fork.
ef04f396	337	The unfollowed process will continue to run..*
a76e022a MS	338	By default, the debugger will follow the parent process..*" \
	339	"help set follow-fork"
	340
	341	# Verify that we can set follow-fork-mode, using an abbreviation
	342	# for both the flag and its value.
	343	#
	344	gdb_test_no_output "set follow-fork ch"
	345
	346	gdb_test "show follow-fork" \
	347	"Debugger response to a program call of fork or vfork is \"child\".*" \
	348	"set follow-fork, using abbreviations"
	349
	350	# Verify that we cannot set follow-fork-mode to nonsense.
	351	#
	352	gdb_test "set follow-fork chork" "Undefined item: \"chork\".*" \
	353	"set follow-fork to nonsense is prohibited"
	354
	355	gdb_test_no_output "set follow-fork parent" "reset parent"
	356
	357	# Check that fork catchpoints are supported, as an indicator for whether
	358	# fork-following is supported.
	359	if [runto_main] then { check_fork_catchpoints }
	360
a1aa2221 LM	361	# Test the basic follow-fork functionality using all combinations of
	362	# values for follow-fork-mode and detach-on-fork, using either a
	363	# breakpoint or single-step to execute past the fork.
a76e022a	364	#
a1aa2221 LM	365	# The first loop should be sufficient to test the defaults. There
	366	# is no need to test using the defaults in other permutations (e.g.
	367	# "default" "on", "parent" "default", etc.).
	368	foreach cmd {"next 2" "continue"} {
	369	test_follow_fork "default" "default" $cmd
	370	}
a76e022a	371
a1aa2221 LM	372	# Now test all explicit permutations.
	373	foreach who {"parent" "child"} {
	374	foreach detach {"on" "off"} {
	375	foreach cmd {"next 2" "continue"} {
	376	test_follow_fork $who $detach $cmd
	377	}
	378	}
	379	}
a76e022a	380
a1aa2221	381	# Catchpoint tests.
a76e022a	382
a1aa2221 LM	383	# Restart to eliminate any effects of the follow-fork tests.
	384	clean_restart $testfile
	385	gdb_test_no_output "set verbose"
a76e022a MS	386
	387	# Test the ability to catch a fork, specify that the child be
	388	# followed, and continue. Make the catchpoint permanent.
	389	#
	390	if [runto_main] then { catch_fork_child_follow }
	391
	392	# Test that parent breakpoints are successfully detached from the
	393	# child at fork time, even if the user removes them from the
	394	# breakpoints list after stopping at a fork catchpoint.
	395	if [runto_main] then { catch_fork_unpatch_child }
	396
	397	# Test the ability to catch a fork, specify via a -do clause that
	398	# the parent be followed, and continue. Make the catchpoint temporary.
	399	#
	400	if [runto_main] then { tcatch_fork_parent_follow }
74cf1395 JM	401	}
74cf1395 JM	402
e85a822c DJ	403	# The "Detaching..." and "Attaching..." messages may be hidden by
e85a822c DJ	404	# default.
27d3a1a2	405	gdb_test_no_output "set verbose"
74cf1395 JM	406
	407	# This is a test of gdb's ability to follow the parent, child or both
	408	# parent and child of a Unix fork() system call.
	409	#
	410	do_fork_tests
	411
	412	return 0