testsuite/gdb.base/set-cwd.exp

# This testcase is part of GDB, the GNU debugger.

# Copyright 2017-2019 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 { [use_gdb_stub] } {
    untested "skipping tests due to use_gdb_stub"
    return
}

standard_testfile

if { [prepare_for_testing "failed to prepare" $testfile $srcfile debug] } {
    return -1
}

# Test that tilde expansion works fine.

proc_with_prefix test_tilde_expansion { } {
    global decimal gdb_prompt hex

    gdb_test_no_output "set cwd ~/" "set inferior cwd to ~/ dir"

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

    gdb_breakpoint [gdb_get_line_number "break-here"]
    gdb_continue_to_breakpoint "break-here" ".* break-here .*"

    set home ""
    set test "print home var"
    gdb_test_multiple "print home" $test {
    	-re "\\\$$decimal = $hex \"\(.+\)\"\r\n$gdb_prompt $" {
    	    set home $expect_out(1,string)
    	    pass $test
    	}
    }

    if { $home == "" } {
    	untested "could not retrieve home var"
    	return
    }

    set curdir ""
    set test "print dir var"
    gdb_test_multiple "print dir" $test {
	-re "\\\$$decimal = \"\(.+\)\"\(, .*repeats.*\)?\r\n$gdb_prompt $" {
	    set curdir $expect_out(1,string)
	    pass $test
	}
    }

    if { $curdir == "" } {
	untested "could not retrieve dir var"
	return
    }

    gdb_assert [string equal $curdir $home] \
	"successfully chdir'd into home"
}

# The temporary directory that we will use to start the inferior.
set tmpdir [standard_output_file ""]

# Test that when we "set cwd" the inferior will be started under the
# correct working directory and GDB will not be affected by this.

proc_with_prefix test_cd_into_dir { } {
    global decimal gdb_prompt tmpdir

    set gdb_cwd_before_run ""
    set test "pwd before run"
    gdb_test_multiple "pwd" $test {
	-re "Working directory \(.*\)\.\r\n$gdb_prompt $" {
	    set gdb_cwd_before_run $expect_out(1,string)
	    pass $test
	}
    }

    if { $gdb_cwd_before_run == "" } {
	untested "could not obtain GDB cwd before run"
	return
    }

    # This test only makes sense if $tmpdir != $gdb_cwd_before_run
    if { ![gdb_assert ![string equal $tmpdir $gdb_cwd_before_run] \
	       "make sure that tmpdir and GDB's cwd are different"] } {
	return -1
    }

    gdb_test_no_output "set cwd $tmpdir" "set inferior cwd to temp dir"

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

    gdb_breakpoint [gdb_get_line_number "break-here"]
    gdb_continue_to_breakpoint "break-here" ".* break-here .*"

    gdb_test "print dir" "\\\$$decimal = \"$tmpdir\", .*" \
	"inferior cwd is correctly set"

    set gdb_cwd_after_run ""
    set test "pwd after run"
    gdb_test_multiple "pwd" $test {
	-re "Working directory \(.*\)\.\r\n$gdb_prompt $" {
	    set gdb_cwd_after_run $expect_out(1,string)
	    pass $test
	}
    }

    if { $gdb_cwd_after_run == "" } {
	untested "could not obtain GDB cwd after run"
	return
    }

    gdb_assert [string equal $gdb_cwd_before_run $gdb_cwd_after_run] \
	"GDB cwd is unchanged after running inferior"
}

# Test that executing "set cwd" without arguments will reset the
# inferior's cwd setting to its previous state.

proc_with_prefix test_cwd_reset { } {
    global decimal gdb_prompt tmpdir

    set gdb_cwd ""
    set test "GDB cwd"
    gdb_test_multiple "pwd" $test {
	-re "Working directory \(.*\)\.\r\n$gdb_prompt $" {
	    set gdb_cwd $expect_out(1,string)
	}
    }

    if { $gdb_cwd == "" } {
	untested "could not obtain GDB cwd"
	return
    }

    # This test only makes sense if $tmpdir != $gdb_cwd.
    if { ![gdb_assert ![string equal $tmpdir $gdb_cwd] \
	       "make sure that tmpdir and GDB's cwd are different"] } {
	return -1
    }

    gdb_test_no_output "set cwd $tmpdir" "set inferior cwd to temp dir"

    with_test_prefix "running with set cwd" {
	if { ![runto_main] } {
	    untested "could not run to main"
	    return -1
	}
    }

    gdb_breakpoint [gdb_get_line_number "break-here"]
    gdb_continue_to_breakpoint "break-here" ".* break-here .*"

    gdb_test "print dir" "\\\$$decimal = \"$tmpdir\", .*" \
	"inferior cwd is correctly set"

    # Reset the inferior's cwd.
    gdb_test_no_output "set cwd" "resetting inferior cwd"

    with_test_prefix "running without set cwd" {
	if { ![runto_main] } {
	    untested "could not run to main"
	    return -1
	}
    }

    gdb_breakpoint [gdb_get_line_number "break-here"]
    gdb_continue_to_breakpoint "break-here" ".* break-here .*"

    gdb_test "print dir" "\\\$$decimal = \"$gdb_cwd\", .*" \
	"inferior cwd got reset correctly"
}

test_cd_into_dir
clean_restart $binfile
test_tilde_expansion
clean_restart $binfile
test_cwd_reset