binutils-gdb/gdb/testsuite/gdb.base/foll-vfork.exp

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# Copyright 1997-2014 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/>.
# Various tests of gdb's ability to follow the parent or child of a
# Unix vfork system call. A vfork parent is blocked until the child
# either execs or exits --- since those events take somewhat different
# code paths in GDB, both variants are exercised.
if { [is_remote target] || ![isnative] } then {
continue
}
# Until "set follow-fork-mode" and "catch vfork" are implemented on
# other targets...
#
if {![istarget "hppa*-hp-hpux*"] && ![istarget "*-linux*"]} then {
continue
}
# Test to see if we are on an HP-UX 10.20 and if so,
# do not run these tests as catching vfork is disabled for
# 10.20.
if [istarget "hppa*-hp-hpux10.20"] then {
return 0
}
# NOTE drow/2002-12-06: I don't know what the referenced kernel problem
# is, but it appears to be fixed in recent HP/UX versions.
##if [istarget "hppa2.0w-hp-hpux*"] {
## warning "Don't run gdb.base/foll-vfork.exp until JAGaa43495 kernel problem is fixed."
## return 0
##}
standard_testfile
set compile_options debug
set dirname [relative_filename [pwd] [file dirname $binfile]]
lappend compile_options "additional_flags=-DBASEDIR=\"$dirname\""
if {[build_executable $testfile.exp $testfile $srcfile $compile_options] == -1} {
untested "failed to compile $testfile"
return -1
}
set testfile2 "vforked-prog"
set srcfile2 ${testfile2}.c
if {[build_executable $testfile.exp $testfile2 $srcfile2 $compile_options] == -1} {
untested "failed to compile $testfile2"
return -1
}
# A few of these tests require a little more time than the standard
# timeout allows.
set oldtimeout $timeout
set timeout [expr "$timeout + 10"]
# Start with a fresh GDB, with verbosity enabled, and run to main. On
# error, behave as "return", so we don't try to continue testing with
# a borked session.
proc setup_gdb {} {
global testfile
clean_restart $testfile
# The "Detaching..." and "Attaching..." messages may be hidden by
# default.
gdb_test_no_output "set verbose"
if ![runto_main] {
return -code return
}
}
proc check_vfork_catchpoints {} {
global gdb_prompt
global has_vfork_catchpoints
setup_gdb
# Verify that the system supports "catch vfork".
gdb_test "catch vfork" "Catchpoint \[0-9\]* \\(vfork\\)" "insert first vfork catchpoint"
set has_vfork_catchpoints 0
gdb_test_multiple "continue" "continue to first vfork catchpoint" {
-re ".*Your system does not support this type\r\nof catchpoint.*$gdb_prompt $" {
unsupported "continue to first vfork catchpoint"
}
-re ".*Catchpoint.*$gdb_prompt $" {
set has_vfork_catchpoints 1
pass "continue to first vfork catchpoint"
}
}
if {$has_vfork_catchpoints == 0} {
unsupported "vfork catchpoints"
return -code return
}
}
proc vfork_parent_follow_through_step {} {
with_test_prefix "vfork parent follow, through step" {
global gdb_prompt
setup_gdb
gdb_test_no_output "set follow-fork parent"
set test "step"
gdb_test_multiple "next" $test {
-re "Detaching after fork from.*if \\(pid == 0\\).*$gdb_prompt " {
pass $test
}
}
# The child has been detached; allow time for any output it might
# generate to arrive, so that output doesn't get confused with
# any gdb_expected debugger output from a subsequent testpoint.
#
exec sleep 1
}}
proc vfork_parent_follow_to_bp {} {
with_test_prefix "vfork parent follow, to bp" {
global gdb_prompt
global srcfile
setup_gdb
gdb_test_no_output "set follow-fork parent"
set bp_location [gdb_get_line_number "printf (\"I'm the proud parent of child"]
gdb_test "break ${srcfile}:${bp_location}" ".*" "break, vfork to bp"
set test "continue to bp"
gdb_test_multiple "continue" $test {
-re ".*Detaching after fork from child process.*Breakpoint.*${bp_location}.*$gdb_prompt " {
pass $test
}
}
# 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
}}
proc vfork_child_follow_to_exit {} {
with_test_prefix "vfork child follow, to exit" {
global gdb_prompt
setup_gdb
gdb_test_no_output "set follow-fork child"
set test "continue to child exit"
gdb_test_multiple "continue" $test {
-re "Couldn't get registers.*$gdb_prompt " {
# PR gdb/14766
fail "$test"
}
-re "Attaching after.* vfork to.*Detaching vfork parent .* after child exit.*$gdb_prompt " {
pass $test
}
}
# The parent has been detached; allow time for any output it might
# generate to arrive, so that output doesn't get confused with
# any gdb_expected debugger output from a subsequent testpoint.
#
exec sleep 1
}}
proc vfork_and_exec_child_follow_to_main_bp {} {
with_test_prefix "vfork and exec child follow, to main bp" {
global gdb_prompt
global srcfile2
setup_gdb
gdb_test_no_output "set follow-fork child"
set linenum [gdb_get_line_number "printf(\"Hello from vforked-prog" ${srcfile2}]
set test "continue to bp"
gdb_test_multiple "continue" $test {
-re "Attaching after.* vfork to.*xecuting new program.*Breakpoint.*vforked-prog.c:${linenum}.*$gdb_prompt " {
pass $test
}
}
# The parent has been detached; allow time for any output it might
# generate to arrive, so that output doesn't get confused with
# any gdb_expected debugger output from a subsequent testpoint.
#
exec sleep 1
}}
proc vfork_and_exec_child_follow_through_step {} {
with_test_prefix "vfork and exec child follow, through step" {
global gdb_prompt
global srcfile2
if { [istarget "hppa*-*-hpux*"] && ![istarget "hppa*-*-hpux11.*"] } {
# This test cannot be performed prior to HP-UX 10.30, because
# ptrace-based debugging of a vforking program basically doesn't
# allow the child to do things like hit a breakpoint between a
# vfork and exec. This means that saying "set follow-fork
# child; next" at a vfork() call won't work, because the
# implementation of "next" sets a "step resume" breakpoint at
# the return from the vfork(), which the child will hit on its
# way to exec'ing.
#
verbose "vfork child-following next test ignored for pre-HP/UX-10.30 targets."
return 0
}
setup_gdb
gdb_test_no_output "set follow-fork child"
set test "step over vfork"
if { [istarget "hppa*-*-hpux*"]} {
# Since the child cannot be debugged until after it has exec'd,
# and since there's a bp on "main" in the parent, and since the
# bp's for the parent are recomputed in the exec'd child, the
# step through a vfork should land us in the "main" for the
# exec'd child, too.
#
set linenum [gdb_get_line_number "printf(\"Hello from vforked-prog" ${srcfile2}]
gdb_test_multiple "next" $test {
-re "Attaching after fork to.*Executing new program.*Breakpoint.*vforked-prog.c:${linenum}.*$gdb_prompt " {
pass "$test"
}
}
} else {
# The ideal support is to be able to debug the child even
# before it execs. Thus, "next" lands on the next line after
# the vfork.
gdb_test_multiple "next" $test {
-re "Attaching after .* vfork to child.*if \\(pid == 0\\).*$gdb_prompt " {
pass "$test"
}
}
}
# 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
}}
proc tcatch_vfork_then_parent_follow {} {
with_test_prefix "vfork parent follow, finish after tcatch vfork" {
global gdb_prompt
global srcfile
setup_gdb
gdb_test_no_output "set follow-fork parent"
gdb_test "tcatch vfork" "Catchpoint .*(vfork).*"
# HP-UX 10.20 seems to stop you in "vfork", while more recent
# HP-UXs stop you in "_vfork".
set test "continue to vfork"
gdb_test_multiple "continue" $test {
-re "0x\[0-9a-fA-F\]*.*(vfork|__kernel_v?syscall).*$gdb_prompt " {
pass $test
}
-re "vfork \\(\\) at.*$gdb_prompt " {
pass $test
}
}
set linenum [gdb_get_line_number "pid = vfork ();"]
set test "finish"
gdb_test_multiple "finish" $test {
-re "Run till exit from.*vfork.*0x\[0-9a-fA-F\]* in main .* at .*${srcfile}:${linenum}.*$gdb_prompt " {
pass $test
}
-re "Run till exit from.*__kernel_v?syscall.*0x\[0-9a-fA-F\]* in vfork .*$gdb_prompt " {
send_gdb "finish\n"
exp_continue
}
}
# 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
}}
proc tcatch_vfork_then_child_follow_exec {} {
with_test_prefix "vfork child follow, finish after tcatch vfork" {
global gdb_prompt
global srcfile
global srcfile2
setup_gdb
gdb_test_no_output "set follow-fork child"
gdb_test "tcatch vfork" "Catchpoint .*(vfork).*"
# HP-UX 10.20 seems to stop you in "vfork", while more recent HP-UXs
# stop you in "_vfork".
set test "continue to vfork"
gdb_test_multiple "continue" $test {
-re "vfork \\(\\) at .*$gdb_prompt $" {
pass $test
}
-re "0x\[0-9a-fA-F\]*.*(vfork|__kernel_v?syscall).*$gdb_prompt " {
pass $test
}
}
set linenum1 [gdb_get_line_number "pid = vfork ();"]
set linenum2 [gdb_get_line_number "printf(\"Hello from vforked-prog" ${srcfile2}]
set test "finish"
gdb_test_multiple "finish" $test {
-re "Run till exit from.*vfork.*${srcfile}:${linenum1}.*$gdb_prompt " {
pass $test
}
-re "Run till exit from.*__kernel_v?syscall.*0x\[0-9a-fA-F\]* in vfork .*$gdb_prompt " {
send_gdb "finish\n"
exp_continue
}
-re "Run till exit from.*vfork.*${srcfile2}:${linenum2}.*$gdb_prompt " {
pass "$test (followed exec)"
}
}
# 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
}}
proc tcatch_vfork_then_child_follow_exit {} {
with_test_prefix "vfork child follow, finish after tcatch vfork" {
global gdb_prompt
global srcfile
setup_gdb
gdb_test_no_output "set follow-fork child"
gdb_test "tcatch vfork" "Catchpoint .*(vfork).*"
# HP-UX 10.20 seems to stop you in "vfork", while more recent HP-UXs
# stop you in "_vfork".
set test "continue to vfork"
gdb_test_multiple "continue" $test {
-re "vfork \\(\\) at .*$gdb_prompt $" {
pass $test
}
-re "0x\[0-9a-fA-F\]*.*(vfork|__kernel_v?syscall).*$gdb_prompt " {
pass $test
}
}
set test "finish"
gdb_test_multiple "finish" $test {
-re "Run till exit from.*vfork.*exited normally.*$gdb_prompt " {
setup_kfail "gdb/14762" *-*-*
fail $test
}
-re "Run till exit from.*vfork.*pid = vfork \\(\\).*$gdb_prompt " {
pass $test
}
-re "Run till exit from.*__kernel_v?syscall.*0x\[0-9a-fA-F\]* in vfork .*$gdb_prompt " {
send_gdb "finish\n"
exp_continue
}
}
# 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
}}
proc vfork_relations_in_info_inferiors { variant } {
with_test_prefix "vfork relations in info inferiors" {
global gdb_prompt
setup_gdb
gdb_test_no_output "set follow-fork child"
set test "step over vfork"
gdb_test_multiple "next" $test {
-re "Attaching after .* vfork to child.*if \\(pid == 0\\).*$gdb_prompt " {
pass "$test"
}
}
gdb_test "info inferiors" \
".*is vfork child of inferior 1.*is vfork parent of inferior 2" \
"info inferiors shows vfork parent/child relation"
if { $variant == "exec" } {
global srcfile2
set linenum [gdb_get_line_number "printf(\"Hello from vforked-prog" ${srcfile2}]
set test "continue to bp"
gdb_test_multiple "continue" $test {
-re ".*xecuting new program.*Breakpoint.*vforked-prog.c:${linenum}.*$gdb_prompt " {
pass $test
}
}
} else {
set test "continue to child exit"
gdb_test_multiple "continue" $test {
-re "exited normally.*$gdb_prompt " {
pass $test
}
}
}
set test "vfork relation no longer appears in info inferiors"
gdb_test_multiple "info inferiors" $test {
-re "is vfork child of inferior 1.*$gdb_prompt $" {
fail $test
}
-re "is vfork parent of inferior 2.*$gdb_prompt $" {
fail $test
}
-re "$gdb_prompt $" {
pass $test
}
}
}}
proc do_vfork_and_follow_parent_tests {} {
global gdb_prompt
# Try following the parent process by stepping through a call to
# vfork. Do this without catchpoints.
vfork_parent_follow_through_step
# Try following the parent process by setting a breakpoint on the
# other side of a vfork, and running to that point. Do this
# without catchpoints.
vfork_parent_follow_to_bp
# Try catching a vfork, and stepping out to the parent.
#
tcatch_vfork_then_parent_follow
}
proc do_vfork_and_follow_child_tests_exec {} {
# Try following the child process by just continuing through the
# vfork, and letting the parent's breakpoint on "main" be auto-
# magically reset in the child.
#
vfork_and_exec_child_follow_to_main_bp
# Try following the child process by stepping through a call to
# vfork. The child also executes an exec. Since the child cannot
# be debugged until after it has exec'd, and since there's a bp on
# "main" in the parent, and since the bp's for the parent are
# recomputed in the exec'd child, the step through a vfork should
# land us in the "main" for the exec'd child, too.
#
vfork_and_exec_child_follow_through_step
# Try catching a vfork, and stepping out to the child.
#
tcatch_vfork_then_child_follow_exec
# Test the ability to follow both child and parent of a vfork. Do
# this without catchpoints.
# ??rehrauer: NYI. Will add testpoints here when implemented.
#
# Test the ability to have the debugger ask the user at vfork-time
# whether to follow the parent, child or both. Do this without
# catchpoints.
# ??rehrauer: NYI. Will add testpoints here when implemented.
#
# Step over a vfork in the child, do "info inferiors" and check the
# parent/child relation is displayed. Run the child over the exec,
# and confirm the relation is no longer displayed in "info
# inferiors".
#
vfork_relations_in_info_inferiors "exec"
}
proc do_vfork_and_follow_child_tests_exit {} {
# Try following the child process by just continuing through the
# vfork, and letting the child exit.
#
vfork_child_follow_to_exit
# Try catching a vfork, and stepping out to the child.
#
tcatch_vfork_then_child_follow_exit
# Step over a vfork in the child, do "info inferiors" and check the
# parent/child relation is displayed. Run the child to completion,
# and confirm the relation is no longer displayed in "info
# inferiors".
#
vfork_relations_in_info_inferiors "exit"
}
with_test_prefix "check vfork support" {
# Check that vfork catchpoints are supported, as an indicator for
# whether vfork-following is supported.
check_vfork_catchpoints
}
# Follow parent and follow child vfork tests with a child that execs.
with_test_prefix "exec" {
# These are tests of gdb's ability to follow the parent of a Unix
# vfork system call. The child will subsequently call a variant
# of the Unix exec system call.
do_vfork_and_follow_parent_tests
# These are tests of gdb's ability to follow the child of a Unix
# vfork system call. The child will subsequently call a variant
# of a Unix exec system call.
#
do_vfork_and_follow_child_tests_exec
}
# Switch to test the case of the child exiting. We can't use
# standard_testfile here because we don't want to overwrite the binary
# of the previous tests.
set testfile "foll-vfork-exit"
set srcfile ${testfile}.c
set binfile [standard_output_file ${testfile}]
if {[build_executable $testfile.exp $testfile $srcfile] == -1} {
untested "failed to build $testfile"
return
}
# Follow parent and follow child vfork tests with a child that exits.
with_test_prefix "exit" {
# These are tests of gdb's ability to follow the parent of a Unix
# vfork system call. The child will subsequently exit.
do_vfork_and_follow_parent_tests
# These are tests of gdb's ability to follow the child of a Unix
# vfork system call. The child will subsequently exit.
#
do_vfork_and_follow_child_tests_exit
}
set timeout $oldtimeout
return 0