gdb/testsuite/gdb.ada/array_of_variable_length.exp

# Copyright 2015-2021 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/>.

load_lib "ada.exp"

if { [skip_ada_tests] } { return -1 }

standard_ada_testfile foo

foreach_with_prefix scenario {all minimal} {
    set flags [list debug additional_flags=-fgnat-encodings=$scenario]

    if {[gdb_compile_ada "${srcfile}" "${binfile}" executable $flags] != ""} {
	return -1
    }

    clean_restart ${testfile}

    set bp_location [gdb_get_line_number "BREAK" ${testdir}/foo.adb]
    runto "foo.adb:$bp_location"

    # Pck.A is an array that embeds elements with variable size so compilers will
    # emit DWARF attributes such as DW_AT_byte_stride to tell GDB how to fetch
    # individual elements.  Array stride is also a way to describe packed arrays:
    # make sure we do not consider Pck.A as a packed array.
    gdb_test "ptype pck.a" "array \\(1 \\.\\. 2\\) of pck\\.r_type"

    # Make sure this also works with a type from a fully evaluated value.  During
    # evaluation, dynamic types can be "resolved" so GDB internals could "forget"
    # that elements have variable size.  Fortunately, type resolution of array
    # elements happens only when processing individual elements (i.e. the resolved
    # array type is still associated to the dynamic element type), so the following
    # is supposed to work.
    gdb_test "print pck.a" \
	"= \\(\\(l => 0, s => \"\"\\), \\(l => 2, s => \"ab\"\\)\\)"
    gdb_test "ptype $"\
	"array \\(1 \\.\\. 2\\) of pck\\.r_type"
}