gdb/testsuite/gdb.base/attach.exp - binutils-gdb - Git at Google

 # Copyright 1997-2021 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/>.  */

 if {![can_spawn_for_attach]} {
     return 0
 }

 standard_testfile attach.c attach2.c attach3.c
 set binfile2 ${binfile}2
 set binfile3 ${binfile}3
 set escapedbinfile  [string_to_regexp $binfile]

 #execute_anywhere "rm -f ${binfile} ${binfile2}"
 remote_exec build "rm -f ${binfile} ${binfile2} ${binfile3}"
 # For debugging this test
 #
 #log_user 1

 # build the first test case
 #
 if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
     untested "failed to compile"
     return -1
 }

 # Build the in-system-call test

 if  { [gdb_compile "${srcdir}/${subdir}/${srcfile2}" "${binfile2}" executable {debug}] != "" } {
     untested "failed to compile in-system-call test"
     return -1
 }

 # Build the third file, used to check attach when the exec-file has changed.

 if  { [gdb_compile "${srcdir}/${subdir}/${srcfile3}" "${binfile3}" executable {debug}] != "" } {
     untested "failed to compile attach exec-file changed test"
     return -1
 }

 if [get_compiler_info] {
     return -1
 }

 # This is a test of the error cases for gdb's ability to attach to a
 # running process.

 proc_with_prefix do_attach_failure_tests {} {
     global gdb_prompt
     global binfile
     global escapedbinfile
     global srcfile

     clean_restart $binfile

     # Figure out a regular expression that will match the sysroot,
     # noting that the default sysroot is "target:", and also noting
     # that GDB will strip "target:" from the start of filenames when
     # operating on the local filesystem.  However the default sysroot
     # can be set via configure option --with-sysroot, which can be "/".
     # If $binfile is a absolute path, so pattern
     # "$sysroot$escapedbinfile" below is wrong.  Use [^\r\n]* to make
     # $sysroot simple.
     set sysroot "\[^\r\n\]*"

     # Start the program running and then wait for a bit, to be sure
     # that it can be attached to.

     set test_spawn_id [spawn_wait_for_attach $binfile]
     set testpid [spawn_id_get_pid $test_spawn_id]

     # Verify that we cannot attach to nonsense.

     set test "attach to nonsense is prohibited"
     gdb_test_multiple "attach abc" "$test" {
 	-re "Illegal process-id: abc\\.\r\n$gdb_prompt $" {
 	    pass "$test"
 	}
 	-re "Attaching to.*, process .*couldn't open /proc file.*$gdb_prompt $" {
 	    # Response expected from /proc-based systems.
 	    pass "$test"
 	}
 	-re "Can't attach to process..*$gdb_prompt $" {
 	    # Response expected on Cygwin
 	    pass "$test"
 	}
 	-re "Attaching to.*$gdb_prompt $" {
 	    fail "$test (bogus pid allowed)"
 	}
     }

     # Verify that we cannot attach to nonsense even if its initial part is
     # a valid PID.

     set test "attach to digits-starting nonsense is prohibited"
     gdb_test_multiple "attach ${testpid}x" "$test" {
 	-re "Illegal process-id: ${testpid}x\\.\r\n$gdb_prompt $" {
 	    pass "$test"
 	}
 	-re "Attaching to.*, process .*couldn't open /proc file.*$gdb_prompt $" {
 	    # Response expected from /proc-based systems.
 	    pass "$test"
 	}
 	-re "Can't attach to process..*$gdb_prompt $" {
 	    # Response expected on Cygwin
 	    pass "$test"
 	}
 	-re "Attaching to.*$gdb_prompt $" {
 	    fail "$test (bogus pid allowed)"
 	}
     }

     # Verify that we cannot attach to what appears to be a valid
     # process ID, but is a process that doesn't exist.  Traditionally,
     # most systems didn't have a process with ID 0, so we take that as
     # the default.  However, there are a few exceptions.

     set boguspid 0
     if { [istarget "*-*-*bsd*"] } {
 	# In FreeBSD 5.0, PID 0 is used for "swapper".  Use -1 instead
 	# (which should have the desired effect on any version of
 	# FreeBSD, and probably other *BSD's too).
 	set boguspid -1
     }
     set test "attach to nonexistent process is prohibited"
     gdb_test_multiple "attach $boguspid" "$test" {
 	-re "Attaching to.*, process $boguspid.*No such process.*$gdb_prompt $" {
 	    # Response expected on ptrace-based systems (i.e. HP-UX 10.20).
 	    pass "$test"
 	}
 	-re "Attaching to.*, process $boguspid failed.*Hint.*$gdb_prompt $" {
 	    # Response expected on ttrace-based systems (i.e. HP-UX 11.0).
 	    pass "$test"
 	}
 	-re "Attaching to.*, process $boguspid.*denied.*$gdb_prompt $" {
 	    pass "$test"
 	}
 	-re "Attaching to.*, process $boguspid.*not permitted.*$gdb_prompt $" {
 	    pass "$test"
 	}
 	-re "Attaching to.*, process .*couldn't open /proc file.*$gdb_prompt $" {
 	    # Response expected from /proc-based systems.
 	    pass "$test"
 	}
 	-re "Can't attach to process..*$gdb_prompt $" {
 	    # Response expected on Cygwin
 	    pass "$test"
 	}
 	-re "Attaching to.*, process $boguspid.*failed.*$gdb_prompt $" {
 	    # Response expected on the extended-remote target.
 	    pass "$test"
 	}
     }

     # Verify that we can't double attach to the process.

     set test "first attach"
     gdb_test_multiple "attach $testpid" "$test" {
 	-re "Attaching to program.*`?$escapedbinfile'?, process $testpid.*main.*at .*$srcfile:.*$gdb_prompt $" {
 	    pass "$test"
 	}
 	-re "Attaching to program.*`?$escapedbinfile\.exe'?, process $testpid.*\[Switching to thread $testpid\..*\].*$gdb_prompt $" {
 	    # Response expected on Cygwin.
 	    pass "$test"
 	}
     }

     gdb_test "add-inferior" "Added inferior 2.*" "add empty inferior 2"
     gdb_test "inferior 2" "Switching to inferior 2.*" "switch to inferior 2"

     # Probe this before the failing attach: the failed attach against GDBserver
     # currently leaves the extended-remote target in a bad state.
     set do_kfail [target_is_gdbserver]

     set test "fail to attach again"
     gdb_test_multiple "attach $testpid" "$test" {
 	-re "Attaching to process $testpid.*warning: process .* is already traced by process .*$gdb_prompt $" {
 	    pass "$test"
 	}
 	-re "Attaching to process .* failed.*$gdb_prompt $" {
 	    # Response expected when using gdbserver.
 	    pass "$test"
 	}
     }

     # To ensure the target is still alive and working after this, try to run
     # inferior 1.
     gdb_test_no_output "set confirm off"
     gdb_test "inferior 1" "Switching to inferior 1.*" "switch to inferior 1"

     if { $do_kfail } { setup_kfail "gdb/19558" "*-*-*" }
     gdb_test "kill" "killed.*" "exit after attach failures"

     # This can probably be replaced with a call to runto or runto_main once
     # the kfail is removed.
     gdb_breakpoint "main"
     gdb_run_cmd
     if { $do_kfail } { setup_kfail "gdb/19558" "*-*-*" }
     gdb_test_multiple "" "stop at main" {
 	-wrap -re "Breakpoint $::decimal, main .*" {
 	    pass $gdb_test_name
 	}
     }

     # Another "don't leave a process around"
     kill_wait_spawned_process $test_spawn_id
 }

 # This is a test of gdb's ability to attach to a running process.

 proc_with_prefix do_attach_tests {} {
     global gdb_prompt
     global binfile
     global escapedbinfile
     global srcfile
     global timeout
     global decimal

     clean_restart $binfile

     # Figure out a regular expression that will match the sysroot,
     # noting that the default sysroot is "target:", and also noting
     # that GDB will strip "target:" from the start of filenames when
     # operating on the local filesystem.  However the default sysroot
     # can be set via configure option --with-sysroot, which can be "/".
     # If $binfile is a absolute path, so pattern
     # "$sysroot$escapedbinfile" below is wrong.  Use [^\r\n]* to make
     # $sysroot simple.
     set sysroot "\[^\r\n\]*"

     # Start the program running and then wait for a bit, to be sure
     # that it can be attached to.

     set test_spawn_id [spawn_wait_for_attach $binfile]
     set testpid [spawn_id_get_pid $test_spawn_id]

     # Verify that we can attach to the process by first giving its
     # executable name via the file command, and using attach with the
     # process ID.

     # (Actually, the test system appears to do this automatically for
     # us.  So, we must also be prepared to be asked if we want to
     # discard an existing set of symbols.)

     set test "set file, before attach1"
     gdb_test_multiple "file $binfile" "$test" {
 	-re "Load new symbol table from.*y or n. $" {
 	    gdb_test "y" "Reading symbols from $escapedbinfile\.\.\.*" \
 		"$test (re-read)"
 	}
 	-re "Reading symbols from $escapedbinfile\.\.\.*$gdb_prompt $" {
 	    pass "$test"
 	}
     }

     set test "attach1, after setting file"
     gdb_test_multiple "attach $testpid" "$test" {
 	-re "Attaching to program.*`?$escapedbinfile'?, process $testpid.*main.*at .*$srcfile:.*$gdb_prompt $" {
 	    pass "$test"
 	}
 	-re "Attaching to program.*`?$escapedbinfile\.exe'?, process $testpid.*\[Switching to thread $testpid\..*\].*$gdb_prompt $" {
 	    # Response expected on Cygwin
 	    pass "$test"
 	}
     }

     # Verify that we can "see" the variable "should_exit" in the
     # program, and that it is zero.

     gdb_test "print should_exit" " = 0" "after attach1, print should_exit"

     # Detach the process.

     gdb_test "detach" \
 	"Detaching from program: .*$escapedbinfile, process $testpid\r\n\\\[Inferior $decimal \\(.*\\) detached\\\]" \
 	"attach1 detach"

     # Wait a bit for gdb to finish detaching

     exec sleep 5

     # Purge the symbols from gdb's brain.  (We want to be certain the
     # next attach, which won't be preceded by a "file" command, is
     # really getting the executable file without our help.)

     set old_timeout $timeout
     set timeout 15
     set test "attach1, purging symbols after detach"
     gdb_test_multiple "file" "$test" {
 	-re "No executable file now.*Discard symbol table.*y or n. $" {
 	    gdb_test "y" "No symbol file now." "$test"
 	}
     }
     set timeout $old_timeout

     # Verify that we can attach to the process just by giving the
     # process ID.

     set test "attach2, with no file"
     set found_exec_file 0
     gdb_test_multiple "attach $testpid" "$test" {
 	-re "Attaching to process $testpid.*Load new symbol table from \"$sysroot$escapedbinfile\.exe\".*y or n. $" {
 	    # On Cygwin, the DLL's symbol tables are loaded prior to the
 	    # executable's symbol table.  This in turn always results in
 	    # asking the user for actually loading the symbol table of the
 	    # executable.
 	    gdb_test "y" "Reading symbols from $sysroot$escapedbinfile\.\.\.*" \
 		"$test (reset file)"

 	    set found_exec_file 1
 	}
 	-re "Attaching to process $testpid.*Reading symbols from $sysroot$escapedbinfile.*main.*at .*$gdb_prompt $" {
 	    pass "$test"
 	    set found_exec_file 1
 	}
     }

     if {$found_exec_file == 0} {
 	set test "load file manually, after attach2"
 	gdb_test_multiple "file $binfile" "$test" {
 	    -re "A program is being debugged already..*Are you sure you want to change the file.*y or n. $" {
 		gdb_test "y" "Reading symbols from $escapedbinfile\.\.\.*" \
 		    "$test (re-read)"
 	    }
 	    -re "Reading symbols from $escapedbinfile\.\.\.*$gdb_prompt $" {
 		pass "$test"
 	    }
 	}
     }

     # Verify that we can modify the variable "should_exit" in the
     # program.

     gdb_test_no_output "set should_exit=1" "after attach2, set should_exit"

     # Verify that the modification really happened.

     gdb_breakpoint [gdb_get_line_number "postloop"] temporary
     gdb_continue_to_breakpoint "postloop" ".* postloop .*"

     # Allow the test process to exit, to cleanup after ourselves.

     gdb_continue_to_end "after attach2, exit"

     # Make sure we don't leave a process around to confuse
     # the next test run (and prevent the compile by keeping
     # the text file busy), in case the "set should_exit" didn't
     # work.

     kill_wait_spawned_process $test_spawn_id

     set test_spawn_id [spawn_wait_for_attach $binfile]
     set testpid [spawn_id_get_pid $test_spawn_id]

     # Verify that we can attach to the process, and find its a.out
     # when we're cd'd to some directory that doesn't contain the
     # a.out.  (We use the source path set by the "dir" command.)

     gdb_test "dir [standard_output_file {}]" "Source directories searched: .*" \
 	"set source path"

     gdb_test "cd /tmp" "Working directory /tmp." \
 	"cd away from process working directory"

     # Explicitly flush out any knowledge of the previous attachment.

     set test "before attach3, flush symbols"
     gdb_test_multiple "symbol-file" "$test" {
 	-re "Discard symbol table from.*y or n. $" {
 	    gdb_test "y" "No symbol file now." \
 		"$test"
 	}
 	-re "No symbol file now.*$gdb_prompt $" {
 	    pass "$test"
 	}
     }

     gdb_test "exec" "No executable file now." \
 	"before attach3, flush exec"

     gdb_test "attach $testpid" \
 	"Attaching to process $testpid.*Reading symbols from $sysroot$escapedbinfile.*main.*at .*" \
 	"attach when process' a.out not in cwd"

     set test "after attach3, exit"
     gdb_test "kill" \
 	"" \
 	"$test" \
 	"Kill the program being debugged.*y or n. $" \
 	"y"

     # Another "don't leave a process around"
     kill_wait_spawned_process $test_spawn_id
 }

 # Test attaching when the target is inside a system call.

 proc_with_prefix do_call_attach_tests {} {
     global gdb_prompt
     global binfile2

     clean_restart

     set test_spawn_id [spawn_wait_for_attach $binfile2]
     set testpid [spawn_id_get_pid $test_spawn_id]

     # Attach

     gdb_test "file $binfile2" ".*" "load file"
     set test "attach call"
     gdb_test_multiple "attach $testpid" "$test" {
 	-re "warning: reading register.*I.*O error.*$gdb_prompt $" {
 	    fail "$test (read register error)"
 	}
 	-re "Attaching to.*process $testpid.*libc.*$gdb_prompt $" {
 	    pass "$test"
 	}
 	-re "Attaching to.*process $testpid.*\[Switching to thread $testpid\..*\].*$gdb_prompt $" {
 	    pass "$test"
 	}
     }

     # See if other registers are problems

     set test "info other register"
     gdb_test_multiple "i r r3" "$test" {
 	-re "warning: reading register.*$gdb_prompt $" {
 	    fail "$test"
 	}
 	-re "r3.*$gdb_prompt $" {
 	    pass "$test"
 	}
     }

     # Get rid of the process

     gdb_test "p should_exit = 1"
     gdb_continue_to_end

     # Be paranoid

     kill_wait_spawned_process $test_spawn_id
 }

 proc_with_prefix do_command_attach_tests {} {
     global gdb_prompt
     global binfile

     if ![isnative] then {
 	unsupported "command attach test"
 	return 0
     }

     set test_spawn_id [spawn_wait_for_attach $binfile]
     set testpid [spawn_id_get_pid $test_spawn_id]

     gdb_exit

     set res [gdb_spawn_with_cmdline_opts \
 		 "-quiet -iex \"set height 0\" -iex \"set width 0\" --pid=$testpid"]
     set test "starting with --pid"
     gdb_test_multiple "" $test {
 	-re "Reading symbols from.*$gdb_prompt $" {
 	    pass "$test"
 	}
     }

     # Get rid of the process
     kill_wait_spawned_process $test_spawn_id
 }

 # Test ' gdb --pid PID -ex "run" '.  GDB used to have a bug where
 # "run" would run before the attach finished - PR17347.

 proc_with_prefix test_command_line_attach_run {} {
     global gdb_prompt
     global binfile

     # The --pid option is used to attach to a process using the native target.
     # Start GDB and run to main just to see what the execution target is, skip
     # if it's not the native target.
     clean_restart $binfile

     if { ![runto_main] } {
 	return
     }

     if { ![gdb_is_target_native] } {
 	unsupported "commandline attach run test"
 	return
     }

     set test_spawn_id [spawn_wait_for_attach $binfile]
     set testpid [spawn_id_get_pid $test_spawn_id]

     set test "run to prompt"
     gdb_exit

     set res [gdb_spawn_with_cmdline_opts \
 		 "-quiet -iex \"set height 0\" -iex \"set width 0\" --pid=$testpid -ex \"start\""]
     if { $res != 0} {
 	fail $test
 	kill_wait_spawned_process $test_spawn_id
 	return $res
     }
     gdb_test_multiple "" $test {
 	-re {Attaching to.*Start it from the beginning\? \(y or n\) } {
 	    pass $test
 	}
     }

     send_gdb "y\n"

     set test "run to main"
     gdb_test_multiple "" $test {
 	-re "Temporary breakpoint .* main .*$gdb_prompt $" {
 	    pass $test
 	}
     }

     # Get rid of the process
     kill_wait_spawned_process $test_spawn_id
 }


 # This is a test of 'set exec-file-mismatch' handling.

 proc_with_prefix do_attach_exec_mismatch_handling_tests {} {
     global gdb_prompt
     global binfile
     global binfile2
     global binfile3

     clean_restart $binfile

     # Start two programs that can be attached to.
     # The first program contains a 'int bidule' variable, the second a 'float bidule'.

     set test_spawn_id [spawn_wait_for_attach $binfile]
     set testpid [spawn_id_get_pid $test_spawn_id]
     set test_spawn_id2 [spawn_wait_for_attach $binfile2]
     set testpid2 [spawn_id_get_pid $test_spawn_id2]


     # Test with the default value of 'set exec-file-mismatch load".
     set test "mismatch load"
     gdb_test "attach $testpid" "Attaching to program.*" "$test attach1"
     # Verify that we can "see" the variable "bidule" in the
     # program, and that it is an integer.
     gdb_test "ptype bidule" " = int" "$test after attach1, bidule is int"
     # Detach the process.
     gdb_test "detach" "Detaching from program: .* detached\\\]" "$test detach1"
     gdb_test_multiple "attach $testpid2" "$test attach2" {
 	-re "Attaching to program.*exec-file-mismatch handling is currently \"ask\".*Load new symbol table from .*attach2\".*\(y or n\)" {
 	    pass "$test attach2"
 	}
     }
     gdb_test "y" "Reading symbols from .*attach2.*" "$test load attach2"
     # Verify that we can "see" the variable "bidule" in the
     # program, and that it is a float.
     gdb_test "ptype bidule" " = float" "$test after attach2 and load, bidule is float"
     # Detach the process.
     gdb_test "detach" "Detaching from program: .* detached\\\]" "$test detach attach2"


     # Test with 'set exec-file-mismatch warn".
     set test "mismatch warn"
     gdb_test_no_output "set exec-file-mismatch warn"
     gdb_test_multiple "attach $testpid" "$test attach" {
 	-re "Attaching to program.*exec-file-mismatch handling is currently \"warn\".*$gdb_prompt" {
 	    pass "$test attach"
 	}
     }
     # Verify that we still (wrongly) "see" the variable "bidule" as a float,
     # as we have not loaded the correct exec-file.
     gdb_test "ptype bidule" " = float" "$test after attach and warn, bidule is float"
     # Detach the process.
     gdb_test "detach" "Detaching from program: .* detached\\\]" "$test detach attach"


     # Same test but with 'set exec-file-mismatch off".
     set test "mismatch off"
     gdb_test_no_output "set exec-file-mismatch off"
     gdb_test_multiple "attach $testpid" "$test attach" {
 	-re "Attaching to program.*$gdb_prompt" {
 	    pass "$test attach"
 	}
     }
     # Verify that we still (wrongly) "see" the variable "bidule" as a float,
     # as we have not warned the user and not loaded the correct exec-file
     gdb_test "ptype bidule" " = float" "$test after attach and warn, bidule is float"
     # Detach the process.
     gdb_test "detach" "Detaching from program: .* detached\\\]" "$test detach attach"

     # Test that the 'exec-file' changed is checked before exec-file-mismatch.
     set test "mismatch exec-file changed has priority"
     gdb_test_no_output "set exec-file-mismatch ask"
     gdb_test_multiple "attach $testpid" "$test attach1 again, initial exec-file" {
 	-re "Attaching to program.*exec-file-mismatch handling is currently \"ask\".*Load new symbol table from .*attach\".*\(y or n\)" {
 	    gdb_test "y" "Reading symbols from .*attach.*" $gdb_test_name
 	}
     }


     gdb_test "detach" "Detaching from program: .* detached\\\]" "$test detach attach initial exec-file"

     # Change the exec-file and attach to a new process using the changed file.
     remote_exec build "mv ${binfile} ${binfile}.initial"
     remote_exec build "mv ${binfile3} ${binfile}"
     # Ensure GDB detects ${binfile} has changed when checking timestamp.
     sleep 1
     remote_exec build "touch ${binfile}"
     set test_spawn_id3 [spawn_wait_for_attach $binfile]
     set testpid3 [spawn_id_get_pid $test_spawn_id3]

     gdb_test "attach $testpid3" "Attaching to program.*attach' has changed; re-reading symbols.*" \
 	"$test attach1 again, after changing exec-file"
     gdb_test "detach" "Detaching from program: .* detached\\\]" "$test detach after attach changed exec-file"

     # Now, test the situation when current exec-file has changed
     # and we attach to a pid using another file.
     # Ensure GDB detects ${binfile} has changed when checking timestamp.
     sleep 1
     remote_exec build "touch ${binfile}"

     gdb_test_multiple "attach $testpid2" "$test attach2" {
 	-re "Attaching to program.*exec-file-mismatch handling is currently \"ask\".*Load new symbol table from .*attach2\".*\(y or n\)" {
 	    gdb_test "y" "Reading symbols from .*attach2.*" $gdb_test_name
 	}
     }

     # Restore initial build situation.
     remote_exec build "mv ${binfile} ${binfile3}"
     remote_exec build "mv ${binfile}.initial ${binfile}"

     # Don't leave a process around
     kill_wait_spawned_process $test_spawn_id
     kill_wait_spawned_process $test_spawn_id2
     kill_wait_spawned_process $test_spawn_id3
 }

 do_attach_tests
 do_attach_failure_tests
 do_call_attach_tests
 do_attach_exec_mismatch_handling_tests

 # Test "gdb --pid"

 do_command_attach_tests


 test_command_line_attach_run

 return 0
	# Copyright 1997-2021 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/>. */

	if {![can_spawn_for_attach]} {
	return 0
	}

	standard_testfile attach.c attach2.c attach3.c
	set binfile2 ${binfile}2
	set binfile3 ${binfile}3
	set escapedbinfile [string_to_regexp $binfile]

	#execute_anywhere "rm -f ${binfile} ${binfile2}"
	remote_exec build "rm -f ${binfile} ${binfile2} ${binfile3}"
	# For debugging this test
	#
	#log_user 1

	# build the first test case
	#
	if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
	untested "failed to compile"
	return -1
	}

	# Build the in-system-call test

	if { [gdb_compile "${srcdir}/${subdir}/${srcfile2}" "${binfile2}" executable {debug}] != "" } {
	untested "failed to compile in-system-call test"
	return -1
	}

	# Build the third file, used to check attach when the exec-file has changed.

	if { [gdb_compile "${srcdir}/${subdir}/${srcfile3}" "${binfile3}" executable {debug}] != "" } {
	untested "failed to compile attach exec-file changed test"
	return -1
	}

	if [get_compiler_info] {
	return -1
	}

	# This is a test of the error cases for gdb's ability to attach to a
	# running process.

	proc_with_prefix do_attach_failure_tests {} {
	global gdb_prompt
	global binfile
	global escapedbinfile
	global srcfile

	clean_restart $binfile

	# Figure out a regular expression that will match the sysroot,
	# noting that the default sysroot is "target:", and also noting
	# that GDB will strip "target:" from the start of filenames when
	# operating on the local filesystem. However the default sysroot
	# can be set via configure option --with-sysroot, which can be "/".
	# If $binfile is a absolute path, so pattern
	# "$sysroot$escapedbinfile" below is wrong. Use [^\r\n]* to make
	# $sysroot simple.
	set sysroot "\[^\r\n\]*"

	# Start the program running and then wait for a bit, to be sure
	# that it can be attached to.

	set test_spawn_id [spawn_wait_for_attach $binfile]
	set testpid [spawn_id_get_pid $test_spawn_id]

	# Verify that we cannot attach to nonsense.

	set test "attach to nonsense is prohibited"
	gdb_test_multiple "attach abc" "$test" {
	-re "Illegal process-id: abc\\.\r\n$gdb_prompt $" {
	pass "$test"
	}
	-re "Attaching to., process .couldn't open /proc file.*$gdb_prompt $" {
	# Response expected from /proc-based systems.
	pass "$test"
	}
	-re "Can't attach to process..*$gdb_prompt $" {
	# Response expected on Cygwin
	pass "$test"
	}
	-re "Attaching to.*$gdb_prompt $" {
	fail "$test (bogus pid allowed)"
	}
	}

	# Verify that we cannot attach to nonsense even if its initial part is
	# a valid PID.

	set test "attach to digits-starting nonsense is prohibited"
	gdb_test_multiple "attach ${testpid}x" "$test" {
	-re "Illegal process-id: ${testpid}x\\.\r\n$gdb_prompt $" {
	pass "$test"
	}
	-re "Attaching to., process .couldn't open /proc file.*$gdb_prompt $" {
	# Response expected from /proc-based systems.
	pass "$test"
	}
	-re "Can't attach to process..*$gdb_prompt $" {
	# Response expected on Cygwin
	pass "$test"
	}
	-re "Attaching to.*$gdb_prompt $" {
	fail "$test (bogus pid allowed)"
	}
	}

	# Verify that we cannot attach to what appears to be a valid
	# process ID, but is a process that doesn't exist. Traditionally,
	# most systems didn't have a process with ID 0, so we take that as
	# the default. However, there are a few exceptions.

	set boguspid 0
	if { [istarget "--bsd"] } {
	# In FreeBSD 5.0, PID 0 is used for "swapper". Use -1 instead
	# (which should have the desired effect on any version of
	# FreeBSD, and probably other *BSD's too).
	set boguspid -1
	}
	set test "attach to nonexistent process is prohibited"
	gdb_test_multiple "attach $boguspid" "$test" {
	-re "Attaching to., process $boguspid.No such process.*$gdb_prompt $" {
	# Response expected on ptrace-based systems (i.e. HP-UX 10.20).
	pass "$test"
	}
	-re "Attaching to., process $boguspid failed.Hint.*$gdb_prompt $" {
	# Response expected on ttrace-based systems (i.e. HP-UX 11.0).
	pass "$test"
	}
	-re "Attaching to., process $boguspid.denied.*$gdb_prompt $" {
	pass "$test"
	}
	-re "Attaching to., process $boguspid.not permitted.*$gdb_prompt $" {
	pass "$test"
	}
	-re "Attaching to., process .couldn't open /proc file.*$gdb_prompt $" {
	# Response expected from /proc-based systems.
	pass "$test"
	}
	-re "Can't attach to process..*$gdb_prompt $" {
	# Response expected on Cygwin
	pass "$test"
	}
	-re "Attaching to., process $boguspid.failed.*$gdb_prompt $" {
	# Response expected on the extended-remote target.
	pass "$test"
	}
	}

	# Verify that we can't double attach to the process.

	set test "first attach"
	gdb_test_multiple "attach $testpid" "$test" {
	-re "Attaching to program.`?$escapedbinfile'?, process $testpid.main.at .$srcfile:.*$gdb_prompt $" {
	pass "$test"
	}
	-re "Attaching to program.`?$escapedbinfile\.exe'?, process $testpid.\[Switching to thread $testpid\..\].$gdb_prompt $" {
	# Response expected on Cygwin.
	pass "$test"
	}
	}

	gdb_test "add-inferior" "Added inferior 2.*" "add empty inferior 2"
	gdb_test "inferior 2" "Switching to inferior 2.*" "switch to inferior 2"

	# Probe this before the failing attach: the failed attach against GDBserver
	# currently leaves the extended-remote target in a bad state.
	set do_kfail [target_is_gdbserver]

	set test "fail to attach again"
	gdb_test_multiple "attach $testpid" "$test" {
	-re "Attaching to process $testpid.warning: process . is already traced by process .*$gdb_prompt $" {
	pass "$test"
	}
	-re "Attaching to process .* failed.*$gdb_prompt $" {
	# Response expected when using gdbserver.
	pass "$test"
	}
	}

	# To ensure the target is still alive and working after this, try to run
	# inferior 1.
	gdb_test_no_output "set confirm off"
	gdb_test "inferior 1" "Switching to inferior 1.*" "switch to inferior 1"

	if { $do_kfail } { setup_kfail "gdb/19558" "--*" }
	gdb_test "kill" "killed.*" "exit after attach failures"

	# This can probably be replaced with a call to runto or runto_main once
	# the kfail is removed.
	gdb_breakpoint "main"
	gdb_run_cmd
	if { $do_kfail } { setup_kfail "gdb/19558" "--*" }
	gdb_test_multiple "" "stop at main" {
	-wrap -re "Breakpoint $::decimal, main .*" {
	pass $gdb_test_name
	}
	}

	# Another "don't leave a process around"
	kill_wait_spawned_process $test_spawn_id
	}

	# This is a test of gdb's ability to attach to a running process.

	proc_with_prefix do_attach_tests {} {
	global gdb_prompt
	global binfile
	global escapedbinfile
	global srcfile
	global timeout
	global decimal

	clean_restart $binfile

	# Figure out a regular expression that will match the sysroot,
	# noting that the default sysroot is "target:", and also noting
	# that GDB will strip "target:" from the start of filenames when
	# operating on the local filesystem. However the default sysroot
	# can be set via configure option --with-sysroot, which can be "/".
	# If $binfile is a absolute path, so pattern
	# "$sysroot$escapedbinfile" below is wrong. Use [^\r\n]* to make
	# $sysroot simple.
	set sysroot "\[^\r\n\]*"

	# Start the program running and then wait for a bit, to be sure
	# that it can be attached to.

	set test_spawn_id [spawn_wait_for_attach $binfile]
	set testpid [spawn_id_get_pid $test_spawn_id]

	# Verify that we can attach to the process by first giving its
	# executable name via the file command, and using attach with the
	# process ID.

	# (Actually, the test system appears to do this automatically for
	# us. So, we must also be prepared to be asked if we want to
	# discard an existing set of symbols.)

	set test "set file, before attach1"
	gdb_test_multiple "file $binfile" "$test" {
	-re "Load new symbol table from.*y or n. $" {
	gdb_test "y" "Reading symbols from $escapedbinfile\.\.\.*" \
	"$test (re-read)"
	}
	-re "Reading symbols from $escapedbinfile\.\.\.*$gdb_prompt $" {
	pass "$test"
	}
	}

	set test "attach1, after setting file"
	gdb_test_multiple "attach $testpid" "$test" {
	-re "Attaching to program.`?$escapedbinfile'?, process $testpid.main.at .$srcfile:.*$gdb_prompt $" {
	pass "$test"
	}
	-re "Attaching to program.`?$escapedbinfile\.exe'?, process $testpid.\[Switching to thread $testpid\..\].$gdb_prompt $" {
	# Response expected on Cygwin
	pass "$test"
	}
	}

	# Verify that we can "see" the variable "should_exit" in the
	# program, and that it is zero.

	gdb_test "print should_exit" " = 0" "after attach1, print should_exit"

	# Detach the process.

	gdb_test "detach" \
	"Detaching from program: .$escapedbinfile, process $testpid\r\n\\\[Inferior $decimal \\(.\\) detached\\\]" \
	"attach1 detach"

	# Wait a bit for gdb to finish detaching

	exec sleep 5

	# Purge the symbols from gdb's brain. (We want to be certain the
	# next attach, which won't be preceded by a "file" command, is
	# really getting the executable file without our help.)

	set old_timeout $timeout
	set timeout 15
	set test "attach1, purging symbols after detach"
	gdb_test_multiple "file" "$test" {
	-re "No executable file now.Discard symbol table.y or n. $" {
	gdb_test "y" "No symbol file now." "$test"
	}
	}
	set timeout $old_timeout

	# Verify that we can attach to the process just by giving the
	# process ID.

	set test "attach2, with no file"
	set found_exec_file 0
	gdb_test_multiple "attach $testpid" "$test" {
	-re "Attaching to process $testpid.Load new symbol table from \"$sysroot$escapedbinfile\.exe\".y or n. $" {
	# On Cygwin, the DLL's symbol tables are loaded prior to the
	# executable's symbol table. This in turn always results in
	# asking the user for actually loading the symbol table of the
	# executable.
	gdb_test "y" "Reading symbols from $sysroot$escapedbinfile\.\.\.*" \
	"$test (reset file)"

	set found_exec_file 1
	}
	-re "Attaching to process $testpid.Reading symbols from $sysroot$escapedbinfile.main.at .$gdb_prompt $" {
	pass "$test"
	set found_exec_file 1
	}
	}

	if {$found_exec_file == 0} {
	set test "load file manually, after attach2"
	gdb_test_multiple "file $binfile" "$test" {
	-re "A program is being debugged already..Are you sure you want to change the file.y or n. $" {
	gdb_test "y" "Reading symbols from $escapedbinfile\.\.\.*" \
	"$test (re-read)"
	}
	-re "Reading symbols from $escapedbinfile\.\.\.*$gdb_prompt $" {
	pass "$test"
	}
	}
	}

	# Verify that we can modify the variable "should_exit" in the
	# program.

	gdb_test_no_output "set should_exit=1" "after attach2, set should_exit"

	# Verify that the modification really happened.

	gdb_breakpoint [gdb_get_line_number "postloop"] temporary
	gdb_continue_to_breakpoint "postloop" ".* postloop .*"

	# Allow the test process to exit, to cleanup after ourselves.

	gdb_continue_to_end "after attach2, exit"

	# Make sure we don't leave a process around to confuse
	# the next test run (and prevent the compile by keeping
	# the text file busy), in case the "set should_exit" didn't
	# work.

	kill_wait_spawned_process $test_spawn_id

	set test_spawn_id [spawn_wait_for_attach $binfile]
	set testpid [spawn_id_get_pid $test_spawn_id]

	# Verify that we can attach to the process, and find its a.out
	# when we're cd'd to some directory that doesn't contain the
	# a.out. (We use the source path set by the "dir" command.)

	gdb_test "dir [standard_output_file {}]" "Source directories searched: .*" \
	"set source path"

	gdb_test "cd /tmp" "Working directory /tmp." \
	"cd away from process working directory"

	# Explicitly flush out any knowledge of the previous attachment.

	set test "before attach3, flush symbols"
	gdb_test_multiple "symbol-file" "$test" {
	-re "Discard symbol table from.*y or n. $" {
	gdb_test "y" "No symbol file now." \
	"$test"
	}
	-re "No symbol file now.*$gdb_prompt $" {
	pass "$test"
	}
	}

	gdb_test "exec" "No executable file now." \
	"before attach3, flush exec"

	gdb_test "attach $testpid" \
	"Attaching to process $testpid.Reading symbols from $sysroot$escapedbinfile.main.at ." \
	"attach when process' a.out not in cwd"

	set test "after attach3, exit"
	gdb_test "kill" \
	"" \
	"$test" \
	"Kill the program being debugged.*y or n. $" \
	"y"

	# Another "don't leave a process around"
	kill_wait_spawned_process $test_spawn_id
	}

	# Test attaching when the target is inside a system call.

	proc_with_prefix do_call_attach_tests {} {
	global gdb_prompt
	global binfile2

	clean_restart

	set test_spawn_id [spawn_wait_for_attach $binfile2]
	set testpid [spawn_id_get_pid $test_spawn_id]

	# Attach

	gdb_test "file $binfile2" ".*" "load file"
	set test "attach call"
	gdb_test_multiple "attach $testpid" "$test" {
	-re "warning: reading register.I.O error.*$gdb_prompt $" {
	fail "$test (read register error)"
	}
	-re "Attaching to.process $testpid.libc.*$gdb_prompt $" {
	pass "$test"
	}
	-re "Attaching to.process $testpid.\[Switching to thread $testpid\..\].$gdb_prompt $" {
	pass "$test"
	}
	}

	# See if other registers are problems

	set test "info other register"
	gdb_test_multiple "i r r3" "$test" {
	-re "warning: reading register.*$gdb_prompt $" {
	fail "$test"
	}
	-re "r3.*$gdb_prompt $" {
	pass "$test"
	}
	}

	# Get rid of the process

	gdb_test "p should_exit = 1"
	gdb_continue_to_end

	# Be paranoid

	kill_wait_spawned_process $test_spawn_id
	}

	proc_with_prefix do_command_attach_tests {} {
	global gdb_prompt
	global binfile

	if ![isnative] then {
	unsupported "command attach test"
	return 0
	}

	set test_spawn_id [spawn_wait_for_attach $binfile]
	set testpid [spawn_id_get_pid $test_spawn_id]

	gdb_exit

	set res [gdb_spawn_with_cmdline_opts \
	"-quiet -iex \"set height 0\" -iex \"set width 0\" --pid=$testpid"]
	set test "starting with --pid"
	gdb_test_multiple "" $test {
	-re "Reading symbols from.*$gdb_prompt $" {
	pass "$test"
	}
	}

	# Get rid of the process
	kill_wait_spawned_process $test_spawn_id
	}

	# Test ' gdb --pid PID -ex "run" '. GDB used to have a bug where
	# "run" would run before the attach finished - PR17347.

	proc_with_prefix test_command_line_attach_run {} {
	global gdb_prompt
	global binfile

	# The --pid option is used to attach to a process using the native target.
	# Start GDB and run to main just to see what the execution target is, skip
	# if it's not the native target.
	clean_restart $binfile

	if { ![runto_main] } {
	return
	}

	if { ![gdb_is_target_native] } {
	unsupported "commandline attach run test"
	return
	}

	set test_spawn_id [spawn_wait_for_attach $binfile]
	set testpid [spawn_id_get_pid $test_spawn_id]

	set test "run to prompt"
	gdb_exit

	set res [gdb_spawn_with_cmdline_opts \
	"-quiet -iex \"set height 0\" -iex \"set width 0\" --pid=$testpid -ex \"start\""]
	if { $res != 0} {
	fail $test
	kill_wait_spawned_process $test_spawn_id
	return $res
	}
	gdb_test_multiple "" $test {
	-re {Attaching to.*Start it from the beginning\? \(y or n\) } {
	pass $test
	}
	}

	send_gdb "y\n"

	set test "run to main"
	gdb_test_multiple "" $test {
	-re "Temporary breakpoint .* main .*$gdb_prompt $" {
	pass $test
	}
	}

	# Get rid of the process
	kill_wait_spawned_process $test_spawn_id
	}


	# This is a test of 'set exec-file-mismatch' handling.

	proc_with_prefix do_attach_exec_mismatch_handling_tests {} {
	global gdb_prompt
	global binfile
	global binfile2
	global binfile3

	clean_restart $binfile

	# Start two programs that can be attached to.
	# The first program contains a 'int bidule' variable, the second a 'float bidule'.

	set test_spawn_id [spawn_wait_for_attach $binfile]
	set testpid [spawn_id_get_pid $test_spawn_id]
	set test_spawn_id2 [spawn_wait_for_attach $binfile2]
	set testpid2 [spawn_id_get_pid $test_spawn_id2]


	# Test with the default value of 'set exec-file-mismatch load".
	set test "mismatch load"
	gdb_test "attach $testpid" "Attaching to program.*" "$test attach1"
	# Verify that we can "see" the variable "bidule" in the
	# program, and that it is an integer.
	gdb_test "ptype bidule" " = int" "$test after attach1, bidule is int"
	# Detach the process.
	gdb_test "detach" "Detaching from program: .* detached\\\]" "$test detach1"
	gdb_test_multiple "attach $testpid2" "$test attach2" {
	-re "Attaching to program.exec-file-mismatch handling is currently \"ask\".Load new symbol table from .attach2\".\(y or n\)" {
	pass "$test attach2"
	}
	}
	gdb_test "y" "Reading symbols from .attach2." "$test load attach2"
	# Verify that we can "see" the variable "bidule" in the
	# program, and that it is a float.
	gdb_test "ptype bidule" " = float" "$test after attach2 and load, bidule is float"
	# Detach the process.
	gdb_test "detach" "Detaching from program: .* detached\\\]" "$test detach attach2"


	# Test with 'set exec-file-mismatch warn".
	set test "mismatch warn"
	gdb_test_no_output "set exec-file-mismatch warn"
	gdb_test_multiple "attach $testpid" "$test attach" {
	-re "Attaching to program.exec-file-mismatch handling is currently \"warn\".$gdb_prompt" {
	pass "$test attach"
	}
	}
	# Verify that we still (wrongly) "see" the variable "bidule" as a float,
	# as we have not loaded the correct exec-file.
	gdb_test "ptype bidule" " = float" "$test after attach and warn, bidule is float"
	# Detach the process.
	gdb_test "detach" "Detaching from program: .* detached\\\]" "$test detach attach"


	# Same test but with 'set exec-file-mismatch off".
	set test "mismatch off"
	gdb_test_no_output "set exec-file-mismatch off"
	gdb_test_multiple "attach $testpid" "$test attach" {
	-re "Attaching to program.*$gdb_prompt" {
	pass "$test attach"
	}
	}
	# Verify that we still (wrongly) "see" the variable "bidule" as a float,
	# as we have not warned the user and not loaded the correct exec-file
	gdb_test "ptype bidule" " = float" "$test after attach and warn, bidule is float"
	# Detach the process.
	gdb_test "detach" "Detaching from program: .* detached\\\]" "$test detach attach"

	# Test that the 'exec-file' changed is checked before exec-file-mismatch.
	set test "mismatch exec-file changed has priority"
	gdb_test_no_output "set exec-file-mismatch ask"
	gdb_test_multiple "attach $testpid" "$test attach1 again, initial exec-file" {
	-re "Attaching to program.exec-file-mismatch handling is currently \"ask\".Load new symbol table from .attach\".\(y or n\)" {
	gdb_test "y" "Reading symbols from .attach." $gdb_test_name
	}
	}


	gdb_test "detach" "Detaching from program: .* detached\\\]" "$test detach attach initial exec-file"

	# Change the exec-file and attach to a new process using the changed file.
	remote_exec build "mv ${binfile} ${binfile}.initial"
	remote_exec build "mv ${binfile3} ${binfile}"
	# Ensure GDB detects ${binfile} has changed when checking timestamp.
	sleep 1
	remote_exec build "touch ${binfile}"
	set test_spawn_id3 [spawn_wait_for_attach $binfile]
	set testpid3 [spawn_id_get_pid $test_spawn_id3]

	gdb_test "attach $testpid3" "Attaching to program.attach' has changed; re-reading symbols." \
	"$test attach1 again, after changing exec-file"
	gdb_test "detach" "Detaching from program: .* detached\\\]" "$test detach after attach changed exec-file"

	# Now, test the situation when current exec-file has changed
	# and we attach to a pid using another file.
	# Ensure GDB detects ${binfile} has changed when checking timestamp.
	sleep 1
	remote_exec build "touch ${binfile}"

	gdb_test_multiple "attach $testpid2" "$test attach2" {
	-re "Attaching to program.exec-file-mismatch handling is currently \"ask\".Load new symbol table from .attach2\".\(y or n\)" {
	gdb_test "y" "Reading symbols from .attach2." $gdb_test_name
	}
	}

	# Restore initial build situation.
	remote_exec build "mv ${binfile} ${binfile3}"
	remote_exec build "mv ${binfile}.initial ${binfile}"

	# Don't leave a process around
	kill_wait_spawned_process $test_spawn_id
	kill_wait_spawned_process $test_spawn_id2
	kill_wait_spawned_process $test_spawn_id3
	}

	do_attach_tests
	do_attach_failure_tests
	do_call_attach_tests
	do_attach_exec_mismatch_handling_tests

	# Test "gdb --pid"

	do_command_attach_tests


	test_command_line_attach_run

	return 0