# Copyright 2013-2020 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/>.

# This testcase was originally for PR gdb/15415, a problem with the "run"
# command expanding symlinks in the name of the program being run.
# This test uses pathnames on build to create symbolic links on host and
# expects the test program running on target to see those symbolic links.
# Therefore, it can't work reliably on anything other than configurations 
# where build/host/target are all the same.

if { ![isnative] } {
    unsupported "argv0-symlink.exp not supported on non-native target"
    return -1
}

if { [is_remote host] } {
    unsupported "argv0-symlink.exp not supported on remote host"
    return -1
}

standard_testfile

set has_argv0 [gdb_has_argv0]

if { [build_executable ${testfile}.exp ${testfile} ${srcfile}] == -1 } {
    return -1
}

set test "kept file symbolic link name"
set filelink "${testfile}-filelink"

remote_file host delete [standard_output_file $filelink]
set status [remote_exec host "ln -sf ${testfile} [standard_output_file $filelink]"]
if {[lindex $status 0] != 0} {
    unsupported "$test (host does not support symbolic links)"
    return 0
}

clean_restart "$filelink"

if ![runto_main] {
    untested "could not run to main"
    return -1
}

gdb_test_no_output "set print repeats 10000"
gdb_test_no_output "set print elements 10000"

if { $has_argv0 } {
    gdb_test {print argv[0]} "/$filelink\"" $test
} else {
    unsupported $test
}

# For a link named /PATH/TO/DIR/LINK, we want to check the output
# against "/DIR/LINK", but computed in a way that doesn't make
# assumptions about the test directory layout.
set full_filelink [standard_output_file $filelink]
set lastdir [file tail [file dirname $full_filelink]]

gdb_test "info inferiors" "/$lastdir/$filelink *" "$test for info inferiors"


set test "kept directory symbolic link name"
set dirlink "${testfile}-dirlink"

# 'ln -sf' does not overwrite symbol link to a directory.
# 'remote_file host delete' uses stat (not lstat), therefore it refuses to
# delete a directory.
remote_exec host "rm -f [standard_output_file $dirlink]"
set status [remote_exec host "ln -sf . [standard_output_file $dirlink]"]
if {[lindex $status 0] != 0} {
    unsupported "$test (host does not support symbolic links)"
    return 0
}

clean_restart "$dirlink/$filelink"

if ![runto_main] {
    untested "could not run to main"
    return -1
}

gdb_test_no_output "set print repeats 10000"
gdb_test_no_output "set print elements 10000"

if { $has_argv0 } {
    # gdbserver in extended-remote mode does not have this issue.
    # Plain remote does, however.
    if {[target_info gdb_protocol] != "extended-remote" || ![target_is_gdbserver]} {
	setup_kfail "*-*-*" gdb/15934
    }
    gdb_test {print argv[0]} "/$dirlink/$filelink\"" $test
} else {
    unsupported $test
}

gdb_test "info inferiors" "/$lastdir/$filelink *" "$test for info inferiors"