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3666a04883
This commits the result of running gdb/copyright.py as per our Start
of New Year procedure...
gdb/ChangeLog
Update copyright year range in copyright header of all GDB files.
509 lines
15 KiB
Plaintext
509 lines
15 KiB
Plaintext
# Copyright 1997-2021 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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# Various tests of gdb's ability to follow the parent or child of a
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# Unix vfork system call. A vfork parent is blocked until the child
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# either execs or exits --- since those events take somewhat different
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# code paths in GDB, both variants are exercised.
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# Until "set follow-fork-mode" and "catch vfork" are implemented on
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# other targets...
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#
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if {![istarget "*-linux*"]} then {
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continue
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}
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# Test relies on checking follow-fork output. Do not run if gdb debug is
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# enabled as it will be redirected to the log.
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if [gdb_debug_enabled] {
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untested "debug is enabled"
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return 0
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}
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standard_testfile
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set compile_options debug
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if {[build_executable $testfile.exp $testfile $srcfile $compile_options] == -1} {
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untested "failed to compile main testcase"
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return -1
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}
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set testfile2 "vforked-prog"
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set srcfile2 ${testfile2}.c
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if {[build_executable $testfile.exp $testfile2 $srcfile2 $compile_options] == -1} {
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untested "failed to compile secondary testcase"
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return -1
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}
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# A few of these tests require a little more time than the standard
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# timeout allows.
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set oldtimeout $timeout
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set timeout [expr "$timeout + 10"]
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# Start with a fresh GDB, with verbosity enabled, and run to main. On
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# error, behave as "return", so we don't try to continue testing with
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# a borked session.
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proc setup_gdb {} {
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global testfile srcfile
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clean_restart $testfile
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if ![runto_main] {
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return -code return
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}
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set tbreak_line [gdb_get_line_number " VFORK " $srcfile]
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gdb_test "tbreak ${tbreak_line}"
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gdb_continue_to_breakpoint ".*"
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}
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proc check_vfork_catchpoints {} {
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global gdb_prompt
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global has_vfork_catchpoints
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setup_gdb
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# Verify that the system supports "catch vfork".
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gdb_test "catch vfork" "Catchpoint \[0-9\]* \\(vfork\\)" "insert first vfork catchpoint"
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set has_vfork_catchpoints 0
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gdb_test_multiple "continue" "continue to first vfork catchpoint" {
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-re ".*Your system does not support this type\r\nof catchpoint.*$gdb_prompt $" {
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unsupported "continue to first vfork catchpoint"
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}
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-re ".*Catchpoint.*$gdb_prompt $" {
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set has_vfork_catchpoints 1
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pass "continue to first vfork catchpoint"
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}
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}
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if {$has_vfork_catchpoints == 0} {
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unsupported "vfork catchpoints"
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return -code return
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}
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}
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proc vfork_parent_follow_through_step {} {
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with_test_prefix "vfork parent follow, through step" {
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global gdb_prompt
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setup_gdb
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gdb_test_no_output "set follow-fork parent"
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set test "step"
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gdb_test_multiple "next" $test {
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-re "\\\[Detaching after vfork from.*if \\(pid == 0\\).*$gdb_prompt " {
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pass $test
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}
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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 vfork_parent_follow_to_bp {} {
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with_test_prefix "vfork parent follow, to bp" {
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global gdb_prompt
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global srcfile
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setup_gdb
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gdb_test_no_output "set follow-fork parent"
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set bp_location [gdb_get_line_number "printf (\"I'm the proud parent of child"]
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gdb_test "break ${srcfile}:${bp_location}" ".*" "break, vfork to bp"
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set test "continue to bp"
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gdb_test_multiple "continue" $test {
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-re ".*\\\[Detaching after vfork from child process.*Breakpoint.*${bp_location}.*$gdb_prompt " {
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pass $test
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}
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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 vfork_child_follow_to_exit {} {
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with_test_prefix "vfork child follow, to exit" {
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global gdb_prompt
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setup_gdb
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gdb_test_no_output "set follow-fork child"
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set test "continue to child exit"
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gdb_test_multiple "continue" $test {
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-re "Couldn't get registers.*$gdb_prompt " {
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# PR gdb/14766
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fail "$test"
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}
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-re "\\\[Attaching after.* vfork to.*\\\[Detaching vfork parent .* after child exit.*$gdb_prompt " {
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pass $test
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}
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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 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 vfork_and_exec_child_follow_to_main_bp {} {
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with_test_prefix "vfork and exec child follow, to main bp" {
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global gdb_prompt
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global srcfile2
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setup_gdb
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gdb_test_no_output "set follow-fork child"
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set linenum [gdb_get_line_number "printf(\"Hello from vforked-prog" ${srcfile2}]
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set test "continue to bp"
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gdb_test_multiple "continue" $test {
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-re "\\\[Attaching after.* vfork to.*\\\[Detaching vfork parent.*xecuting new program.*Breakpoint.*vforked-prog.c:${linenum}.*$gdb_prompt " {
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pass $test
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}
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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 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 vfork_and_exec_child_follow_through_step {} {
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with_test_prefix "vfork and exec child follow, through step" {
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global gdb_prompt
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global srcfile2
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setup_gdb
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gdb_test_no_output "set follow-fork child"
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set test "step over vfork"
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# The ideal support is to be able to debug the child even
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# before it execs. Thus, "next" lands on the next line after
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# the vfork.
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gdb_test_multiple "next" $test {
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-re "\\\[Attaching after .* vfork to child.*if \\(pid == 0\\).*$gdb_prompt " {
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pass "$test"
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}
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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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}}
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proc continue_to_vfork {} {
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global gdb_prompt
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# A vfork catchpoint may stop in either "vfork" or "_vfork".
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set test "continue to vfork"
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gdb_test_multiple "continue" $test {
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-re "vfork \\(\\) at .*$gdb_prompt $" {
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pass $test
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}
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-re "0x\[0-9a-fA-F\]*.*(vfork|__kernel_v?syscall).*$gdb_prompt " {
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pass $test
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}
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}
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}
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proc tcatch_vfork_then_parent_follow {} {
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with_test_prefix "vfork parent follow, finish after tcatch vfork" {
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global gdb_prompt
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global srcfile
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setup_gdb
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gdb_test_no_output "set follow-fork parent"
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gdb_test "tcatch vfork" "Catchpoint .*(vfork).*"
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continue_to_vfork
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set linenum [gdb_get_line_number "pid = vfork ();"]
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set test "finish"
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gdb_test_multiple "finish" $test {
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-re "Run till exit from.*vfork.*0x\[0-9a-fA-F\]* in main .* at .*${srcfile}:${linenum}.*$gdb_prompt " {
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pass $test
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}
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-re "Run till exit from.*__kernel_v?syscall.*0x\[0-9a-fA-F\]* in vfork .*$gdb_prompt " {
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send_gdb "finish\n"
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exp_continue
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}
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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 tcatch_vfork_then_child_follow_exec {} {
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with_test_prefix "vfork child follow, finish after tcatch vfork" {
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global gdb_prompt
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global srcfile
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global srcfile2
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setup_gdb
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gdb_test_no_output "set follow-fork child"
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gdb_test "tcatch vfork" "Catchpoint .*(vfork).*"
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continue_to_vfork
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set linenum1 [gdb_get_line_number "pid = vfork ();"]
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set linenum2 [gdb_get_line_number "printf(\"Hello from vforked-prog" ${srcfile2}]
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set test "finish"
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gdb_test_multiple "finish" $test {
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-re "Run till exit from.*vfork.*${srcfile}:${linenum1}.*$gdb_prompt " {
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pass $test
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}
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-re "Run till exit from.*__kernel_v?syscall.*0x\[0-9a-fA-F\]* in vfork .*$gdb_prompt " {
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send_gdb "finish\n"
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exp_continue
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}
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-re "Run till exit from.*vfork.*${srcfile2}:${linenum2}.*$gdb_prompt " {
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pass "$test (followed exec)"
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}
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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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}}
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proc tcatch_vfork_then_child_follow_exit {} {
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with_test_prefix "vfork child follow, finish after tcatch vfork" {
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global gdb_prompt
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global srcfile
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setup_gdb
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gdb_test_no_output "set follow-fork child"
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gdb_test "tcatch vfork" "Catchpoint .*(vfork).*"
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continue_to_vfork
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set test "finish"
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gdb_test_multiple "finish" $test {
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-re "Run till exit from.*vfork.*exited normally.*$gdb_prompt " {
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setup_kfail "gdb/14762" *-*-*
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fail $test
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}
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-re "Run till exit from.*vfork.*pid = vfork \\(\\).*$gdb_prompt " {
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pass $test
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}
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-re "Run till exit from.*__kernel_v?syscall.*0x\[0-9a-fA-F\]* in vfork .*$gdb_prompt " {
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send_gdb "finish\n"
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exp_continue
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}
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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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}}
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proc vfork_relations_in_info_inferiors { variant } {
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with_test_prefix "vfork relations in info inferiors" {
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global gdb_prompt
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setup_gdb
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gdb_test_no_output "set follow-fork child"
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set test "step over vfork"
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gdb_test_multiple "next" $test {
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-re "\\\[Attaching after .* vfork to child.*if \\(pid == 0\\).*$gdb_prompt " {
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pass "$test"
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}
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}
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gdb_test "info inferiors" \
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".*is vfork parent of inferior 2.*is vfork child of inferior 1" \
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"info inferiors shows vfork parent/child relation"
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if { $variant == "exec" } {
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global srcfile2
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set linenum [gdb_get_line_number "printf(\"Hello from vforked-prog" ${srcfile2}]
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set test "continue to bp"
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gdb_test_multiple "continue" $test {
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-re ".*xecuting new program.*Breakpoint.*vforked-prog.c:${linenum}.*$gdb_prompt " {
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pass $test
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}
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}
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} else {
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set test "continue to child exit"
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gdb_test_multiple "continue" $test {
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-re "exited normally.*$gdb_prompt " {
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pass $test
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}
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}
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}
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set test "vfork relation no longer appears in info inferiors"
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gdb_test_multiple "info inferiors" $test {
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-re "is vfork child of inferior 1.*$gdb_prompt $" {
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fail $test
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}
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-re "is vfork parent of inferior 2.*$gdb_prompt $" {
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fail $test
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}
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-re "$gdb_prompt $" {
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pass $test
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}
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}
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}}
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proc do_vfork_and_follow_parent_tests {} {
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global gdb_prompt
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# Try following the parent process by stepping through a call to
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# vfork. Do this without catchpoints.
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vfork_parent_follow_through_step
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# Try following the parent process by setting a breakpoint on the
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# other side of a vfork, and running to that point. Do this
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# without catchpoints.
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vfork_parent_follow_to_bp
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# Try catching a vfork, and stepping out to the parent.
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#
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tcatch_vfork_then_parent_follow
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}
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proc do_vfork_and_follow_child_tests_exec {} {
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# Try following the child process by just continuing through the
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# vfork, and letting the parent's breakpoint on "main" be auto-
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# magically reset in the child.
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#
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vfork_and_exec_child_follow_to_main_bp
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# Try following the child process by stepping through a call to
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# vfork. The child also executes an exec. Since the child cannot
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# be debugged until after it has exec'd, and since there's a bp on
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# "main" in the parent, and since the bp's for the parent are
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# recomputed in the exec'd child, the step through a vfork should
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# land us in the "main" for the exec'd child, too.
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#
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vfork_and_exec_child_follow_through_step
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# Try catching a vfork, and stepping out to the child.
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#
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tcatch_vfork_then_child_follow_exec
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# Test the ability to follow both child and parent of a vfork. 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 vfork-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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# Step over a vfork in the child, do "info inferiors" and check the
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# parent/child relation is displayed. Run the child over the exec,
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# and confirm the relation is no longer displayed in "info
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# inferiors".
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#
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vfork_relations_in_info_inferiors "exec"
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}
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proc do_vfork_and_follow_child_tests_exit {} {
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# Try following the child process by just continuing through the
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# vfork, and letting the child exit.
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#
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vfork_child_follow_to_exit
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# Try catching a vfork, and stepping out to the child.
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#
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tcatch_vfork_then_child_follow_exit
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# Step over a vfork in the child, do "info inferiors" and check the
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# parent/child relation is displayed. Run the child to completion,
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# and confirm the relation is no longer displayed in "info
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# inferiors".
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#
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vfork_relations_in_info_inferiors "exit"
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}
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with_test_prefix "check vfork support" {
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# Check that vfork catchpoints are supported, as an indicator for
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# whether vfork-following is supported.
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check_vfork_catchpoints
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}
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# Follow parent and follow child vfork tests with a child that execs.
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with_test_prefix "exec" {
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# These are tests of gdb's ability to follow the parent of a Unix
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# vfork system call. The child will subsequently call a variant
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# of the Unix exec system call.
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do_vfork_and_follow_parent_tests
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# These are tests of gdb's ability to follow the child of a Unix
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# vfork system call. The child will subsequently call a variant
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# of a Unix exec system call.
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#
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do_vfork_and_follow_child_tests_exec
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}
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# Switch to test the case of the child exiting. We can't use
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# standard_testfile here because we don't want to overwrite the binary
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# of the previous tests.
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set testfile "foll-vfork-exit"
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set srcfile ${testfile}.c
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set binfile [standard_output_file ${testfile}]
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if {[build_executable $testfile.exp $testfile $srcfile] == -1} {
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untested "failed to build $testfile"
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return
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}
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# Follow parent and follow child vfork tests with a child that exits.
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with_test_prefix "exit" {
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# These are tests of gdb's ability to follow the parent of a Unix
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# vfork system call. The child will subsequently exit.
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do_vfork_and_follow_parent_tests
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# These are tests of gdb's ability to follow the child of a Unix
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# vfork system call. The child will subsequently exit.
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#
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do_vfork_and_follow_child_tests_exit
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}
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set timeout $oldtimeout
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return 0
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