448 lines
16 KiB
Plaintext
448 lines
16 KiB
Plaintext
# Copyright 1997, 1999, 2007, 2008, 2009, 2010
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# Free Software Foundation, Inc.
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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if { [is_remote target] || ![isnative] } then {
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continue
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}
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set prms_id 0
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set bug_id 0
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global srcfile
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set testfile "foll-fork"
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set srcfile ${testfile}.c
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set binfile ${objdir}/${subdir}/${testfile}
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if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
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untested foll-fork.exp
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return -1
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}
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# Until "set follow-fork-mode" and "catch fork" are implemented on
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# other targets...
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#
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if {![istarget "hppa*-hp-hpux*"] && ![istarget "*-linux*"]} then {
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continue
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}
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proc check_fork_catchpoints {} {
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global gdb_prompt
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# Verify that the system supports "catch fork".
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gdb_test "catch fork" "Catchpoint \[0-9\]* \\(fork\\)" "insert first fork catchpoint"
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set has_fork_catchpoints 0
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gdb_test_multiple "continue" "continue to first fork catchpoint" {
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-re ".*Your system does not support fork catchpoints.*$gdb_prompt $" {
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unsupported "continue to first fork catchpoint"
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}
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-re ".*Catchpoint.*$gdb_prompt $" {
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set has_fork_catchpoints 1
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pass "continue to first fork catchpoint"
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}
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}
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if {$has_fork_catchpoints == 0} {
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unsupported "fork catchpoints"
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return -code return
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}
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}
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proc default_fork_parent_follow {} {
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global gdb_prompt
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send_gdb "show follow-fork\n"
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gdb_expect {
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-re "Debugger response to a program call of fork or vfork is \"parent\"..*$gdb_prompt $"\
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{pass "default show parent follow, no catchpoints"}
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-re "$gdb_prompt $" {fail "default show parent follow, no catchpoints"}
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timeout {fail "(timeout) default show parent follow, no catchpoints"}
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}
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send_gdb "next 2\n"
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gdb_expect {
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-re "Detaching after fork from.*$gdb_prompt $"\
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{pass "default parent follow, no catchpoints"}
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-re "$gdb_prompt $" {fail "default parent follow, no catchpoints"}
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timeout {fail "(timeout) default parent follow, no catchpoints" }
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}
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# The child has been detached; allow time for any output it might
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# generate to arrive, so that output doesn't get confused with
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# any expected debugger output from a subsequent testpoint.
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#
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exec sleep 1
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}
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proc explicit_fork_parent_follow {} {
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global gdb_prompt
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send_gdb "set follow-fork parent\n"
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gdb_expect {
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-re "$gdb_prompt $" {pass "set follow-fork parent"}
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timeout {fail "(timeout) set follow-fork parent"}
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}
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send_gdb "show follow-fork\n"
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gdb_expect {
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-re "Debugger response to a program call of fork or vfork is \"parent\"..*$gdb_prompt $"\
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{pass "explicit show parent follow, no catchpoints"}
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-re "$gdb_prompt $" {fail "explicit show parent follow, no catchpoints"}
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timeout {fail "(timeout) explicit show parent follow, no catchpoints"}
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}
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send_gdb "next 2\n"
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gdb_expect {
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-re "Detaching after fork from.*$gdb_prompt $"\
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{pass "explicit parent follow, no catchpoints"}
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-re "$gdb_prompt $" {fail "explicit parent follow, no catchpoints"}
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timeout {fail "(timeout) explicit parent follow, no catchpoints"}
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}
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# The child has been detached; allow time for any output it might
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# generate to arrive, so that output doesn't get confused with
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# any expected debugger output from a subsequent testpoint.
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#
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exec sleep 1
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}
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proc explicit_fork_child_follow {} {
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global gdb_prompt
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send_gdb "set follow-fork child\n"
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gdb_expect {
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-re "$gdb_prompt $" {pass "set follow-fork child"}
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timeout {fail "(timeout) set follow-fork child"}
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}
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send_gdb "show follow-fork\n"
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gdb_expect {
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-re "Debugger response to a program call of fork or vfork is \"child\"..*$gdb_prompt $"\
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{pass "explicit show child follow, no catchpoints"}
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-re "$gdb_prompt $" {fail "explicit show child follow, no catchpoints"}
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timeout {fail "(timeout) explicit show child follow, no catchpoints"}
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}
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send_gdb "next 2\n"
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gdb_expect {
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-re "Attaching after.* fork to.*$gdb_prompt $"\
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{pass "explicit child follow, no catchpoints"}
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-re "$gdb_prompt $" {fail "explicit child follow, no catchpoints"}
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timeout {fail "(timeout) explicit child follow, no catchpoints"}
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}
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# The child has been detached; allow time for any output it might
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# generate to arrive, so that output doesn't get confused with
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# any gdb_expected debugger output from a subsequent testpoint.
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#
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exec sleep 1
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}
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proc catch_fork_child_follow {} {
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global gdb_prompt
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global srcfile
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set bp_after_fork [gdb_get_line_number "set breakpoint here"]
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send_gdb "catch fork\n"
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gdb_expect {
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-re "Catchpoint .*(fork).*$gdb_prompt $"\
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{pass "explicit child follow, set catch fork"}
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-re "$gdb_prompt $" {fail "explicit child follow, set catch fork"}
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timeout {fail "(timeout) explicit child follow, set catch fork"}
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}
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# Verify that the catchpoint is mentioned in an "info breakpoints",
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# and further that the catchpoint mentions no process id.
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#
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set test_name "info shows catchpoint without pid"
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gdb_test_multiple "info breakpoints" "$test_name" {
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-re ".*catchpoint.*keep y.*fork\[\r\n\]+$gdb_prompt $" {
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pass "$test_name"
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}
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}
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send_gdb "continue\n"
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gdb_expect {
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-re "Catchpoint.*(forked process.*),.*in .*(fork|__kernel_v?syscall).*$gdb_prompt $"\
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{pass "explicit child follow, catch fork"}
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-re "$gdb_prompt $" {fail "explicit child follow, catch fork"}
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timeout {fail "(timeout) explicit child follow, catch fork"}
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}
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# Verify that the catchpoint is mentioned in an "info breakpoints",
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# and further that the catchpoint managed to capture a process id.
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#
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set test_name "info shows catchpoint without pid"
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gdb_test_multiple "info breakpoints" "$test_name" {
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-re ".*catchpoint.*keep y.*fork, process.*$gdb_prompt $" {
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pass "$test_name"
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}
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}
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send_gdb "set follow-fork child\n"
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gdb_expect {
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-re "$gdb_prompt $" {pass "set follow-fork child"}
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timeout {fail "(timeout) set follow-fork child"}
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}
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send_gdb "tbreak ${srcfile}:$bp_after_fork\n"
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gdb_expect {
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-re "Temporary breakpoint.*, line $bp_after_fork.*$gdb_prompt $"\
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{pass "set follow-fork child, tbreak"}
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-re "$gdb_prompt $" {fail "set follow-fork child, tbreak"}
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timeout {fail "(timeout) set follow-fork child, tbreak"}
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}
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send_gdb "continue\n"
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gdb_expect {
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-re "Attaching after.* fork to.* at .*$bp_after_fork.*$gdb_prompt $"\
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{pass "set follow-fork child, hit tbreak"}
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-re "$gdb_prompt $" {fail "set follow-fork child, hit tbreak"}
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timeout {fail "(timeout) set follow-fork child, hit tbreak"}
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}
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# The parent has been detached; allow time for any output it might
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# generate to arrive, so that output doesn't get confused with
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# any expected debugger output from a subsequent testpoint.
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#
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exec sleep 1
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send_gdb "delete breakpoints\n"
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gdb_expect {
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-re "Delete all breakpoints.*$" {
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send_gdb "y\n"
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gdb_expect {
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-re "$gdb_prompt $"\
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{pass "set follow-fork child, cleanup"}
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timeout {fail "(timeout) set follow-fork child, cleanup"}
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}
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}
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-re "$gdb_prompt $" {fail "set follow-fork child, cleanup"}
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timeout {fail "(timeout) set follow-fork child, cleanup"}
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}
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}
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proc catch_fork_unpatch_child {} {
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global gdb_prompt
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global srcfile
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set bp_exit [gdb_get_line_number "at exit"]
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gdb_test "break callee" "file .*$srcfile, line .*" "unpatch child, break at callee"
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gdb_test "catch fork" "Catchpoint \[0-9\]* \\(fork\\)" "unpatch child, set catch fork"
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gdb_test "continue" \
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"Catchpoint.*\\(forked process.*\\).*,.*in .*(fork|__kernel_v?syscall).*" \
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"unpatch child, catch fork"
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# Delete all breakpoints and catchpoints.
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delete_breakpoints
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# Force $srcfile as the current GDB source can be in glibc sourcetree.
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gdb_test "break $srcfile:$bp_exit" \
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"Breakpoint .*file .*$srcfile, line .*" \
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"unpatch child, breakpoint at exit call"
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gdb_test "set follow-fork child" "" "unpatch child, set follow-fork child"
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set test "unpatch child, unpatched parent breakpoints from child"
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gdb_test_multiple "continue" $test {
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-re "at exit.*$gdb_prompt $" {
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pass "$test"
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}
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-re "SIGTRAP.*$gdb_prompt $" {
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fail "$test"
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# Explicitly kill this child, so we can continue gracefully
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# with further testing...
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send_gdb "kill\n"
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gdb_expect {
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-re ".*Kill the program being debugged.*y or n. $" {
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send_gdb "y\n"
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gdb_expect -re "$gdb_prompt $" {}
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}
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}
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}
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-re ".*$gdb_prompt $" {
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fail "$test (unknown output)"
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}
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timeout {
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fail "$test (timeout)"
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}
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}
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}
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proc tcatch_fork_parent_follow {} {
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global gdb_prompt
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global srcfile
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set bp_after_fork [gdb_get_line_number "set breakpoint here"]
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send_gdb "catch fork\n"
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gdb_expect {
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-re "Catchpoint .*(fork).*$gdb_prompt $"\
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{pass "explicit parent follow, set tcatch fork"}
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-re "$gdb_prompt $" {fail "explicit parent follow, set tcatch fork"}
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timeout {fail "(timeout) explicit parent follow, set tcatch fork"}
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}
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# ??rehrauer: I don't yet know how to get the id of the tcatch
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# via this script, so that I can add a -do list to it. For now,
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# do the follow stuff after the catch happens.
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send_gdb "continue\n"
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gdb_expect {
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-re ".*in .*(fork|__kernel_v?syscall).*$gdb_prompt $"\
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{pass "explicit parent follow, tcatch fork"}
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-re "$gdb_prompt $" {fail "explicit parent follow, tcatch fork"}
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timeout {fail "(timeout) explicit parent follow, tcatch fork"}
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}
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send_gdb "set follow-fork parent\n"
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gdb_expect {
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-re "$gdb_prompt $" {pass "set follow-fork parent"}
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timeout {fail "(timeout) set follow-fork parent"}
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}
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send_gdb "tbreak ${srcfile}:$bp_after_fork\n"
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gdb_expect {
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-re "Temporary breakpoint.*, line $bp_after_fork.*$gdb_prompt $"\
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{pass "set follow-fork parent, tbreak"}
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-re "$gdb_prompt $" {fail "set follow-fork parent, tbreak"}
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timeout {fail "(timeout) set follow-fork child, tbreak"}
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}
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send_gdb "continue\n"
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gdb_expect {
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-re ".*Detaching after fork from.* at .*$bp_after_fork.*$gdb_prompt $"\
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{pass "set follow-fork parent, hit tbreak"}
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-re "$gdb_prompt $" {fail "set follow-fork parent, hit tbreak"}
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timeout {fail "(timeout) set follow-fork parent, hit tbreak"}
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}
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# The child has been detached; allow time for any output it might
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# generate to arrive, so that output doesn't get confused with
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# any expected debugger output from a subsequent testpoint.
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#
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exec sleep 1
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send_gdb "delete breakpoints\n"
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gdb_expect {
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-re "Delete all breakpoints.*$" {
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send_gdb "y\n"
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gdb_expect {
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-re "$gdb_prompt $"\
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{pass "set follow-fork parent, cleanup"}
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timeout {fail "(timeout) set follow-fork parent, cleanup"}
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}
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}
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-re "$gdb_prompt $" {fail "set follow-fork parent, cleanup"}
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timeout {fail "(timeout) set follow-fork parent, cleanup"}
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}
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}
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proc do_fork_tests {} {
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global gdb_prompt
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# Verify that help is available for "set follow-fork-mode".
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#
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send_gdb "help set follow-fork-mode\n"
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gdb_expect {
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-re "Set debugger response to a program call of fork or vfork..*
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A fork or vfork creates a new process. follow-fork-mode can be:.*
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.*parent - the original process is debugged after a fork.*
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.*child - the new process is debugged after a fork.*
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The unfollowed process will continue to run..*
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By default, the debugger will follow the parent process..*$gdb_prompt $"\
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{ pass "help set follow-fork" }
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-re "$gdb_prompt $" { fail "help set follow" }
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timeout { fail "(timeout) help set follow-fork" }
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}
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# Verify that we can set follow-fork-mode, using an abbreviation
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# for both the flag and its value.
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#
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send_gdb "set follow-fork ch\n"
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send_gdb "show follow-fork\n"
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gdb_expect {
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-re "Debugger response to a program call of fork or vfork is \"child\".*$gdb_prompt $"\
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{pass "set follow-fork, using abbreviations"}
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timeout {fail "(timeout) set follow-fork, using abbreviations"}
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}
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# Verify that we cannot set follow-fork-mode to nonsense.
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#
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send_gdb "set follow-fork chork\n"
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gdb_expect {
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-re "Undefined item: \"chork\".*$gdb_prompt $"\
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{pass "set follow-fork to nonsense is prohibited"}
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-re "$gdb_prompt $" {fail "set follow-fork to nonsense is prohibited"}
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timeout {fail "(timeout) set follow-fork to nonsense is prohibited"}
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}
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send_gdb "set follow-fork parent\n"
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gdb_expect {
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-re "$gdb_prompt $" {pass "set follow-fork to nonsense is prohibited (reset parent)"}
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timeout {fail "set follow-fork to nonsense is prohibited (reset parent)"}
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}
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# Check that fork catchpoints are supported, as an indicator for whether
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# fork-following is supported.
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if [runto_main] then { check_fork_catchpoints }
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# Test the default behaviour, which is to follow the parent of a
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# fork, and detach from the child. Do this without catchpoints.
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#
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if [runto_main] then { default_fork_parent_follow }
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# Test the ability to explicitly follow the parent of a fork, and
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# detach from the child. Do this without catchpoints.
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#
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if [runto_main] then { explicit_fork_parent_follow }
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# Test the ability to follow the child of a fork, and detach from
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# the parent. Do this without catchpoints.
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#
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if [runto_main] then { explicit_fork_child_follow }
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# Test the ability to follow both child and parent of a fork. Do
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# this without catchpoints.
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# ??rehrauer: NYI. Will add testpoints here when implemented.
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#
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# Test the ability to have the debugger ask the user at fork-time
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# whether to follow the parent, child or both. Do this without
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# catchpoints.
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# ??rehrauer: NYI. Will add testpoints here when implemented.
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#
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# Test the ability to catch a fork, specify that the child be
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# followed, and continue. Make the catchpoint permanent.
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#
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if [runto_main] then { catch_fork_child_follow }
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# Test that parent breakpoints are successfully detached from the
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# child at fork time, even if the user removes them from the
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# breakpoints list after stopping at a fork catchpoint.
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if [runto_main] then { catch_fork_unpatch_child }
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# Test the ability to catch a fork, specify via a -do clause that
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# the parent be followed, and continue. Make the catchpoint temporary.
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#
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if [runto_main] then { tcatch_fork_parent_follow }
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}
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# Start with a fresh gdb
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gdb_exit
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gdb_start
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gdb_reinitialize_dir $srcdir/$subdir
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gdb_load ${binfile}
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# The "Detaching..." and "Attaching..." messages may be hidden by
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# default.
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gdb_test "set verbose" ""
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# This is a test of gdb's ability to follow the parent, child or both
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# parent and child of a Unix fork() system call.
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#
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do_fork_tests
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return 0
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