# Copyright 2022-2024 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 dwarf.exp

# This test can only be run on targets which support DWARF-2 and use gas.
require dwarf2_support

standard_testfile _start.c debug-names.S

set func_info_vars \
    [get_func_info _start [list debug additional_flags=-nostartfiles]]

# Create the DWARF.
set asm_file [standard_output_file $srcfile2]
Dwarf::assemble {
    filename $asm_file
    add_dummy_cus 0
} {
    global func_info_vars
    foreach var $func_info_vars {
	global $var
    }

    cu { label cu_label } {
	compile_unit {{language @DW_LANG_C}} {
	    subprogram {
		{DW_AT_name _start}
		{DW_AT_low_pc $_start_start DW_FORM_addr}
		{DW_AT_high_pc $_start_end DW_FORM_addr}
	    }
	    base_type {
		{name int}
		{byte_size 4 sdata}
		{encoding @DW_ATE_signed}
	    }
	}
    }

    # This CU is missing from the cu list in .debug_names.
    cu {} {
    }

    debug_names {} {
	cu cu_label
	name _start subprogram cu_label 0xEDDB6232
	name int base_type cu_label 0xB888030
    }
}

if [prepare_for_testing "failed to prepare" $testfile "${asm_file} ${srcfile}" \
	[list additional_flags=-nostartfiles]] {
    return -1
}

# Verify that .debug_names section is not ignored.
set index [have_index $binfile]
gdb_assert { [string equal $index ""] } ".debug_names not used"

# Verify that initially no symtab is expanded.
gdb_test_no_output "maint info symtabs"

# Verify that _start is found in the debuginfo, rather than in the minimal
# symbols, which would result instead in:
#   $1 = {<text variable, no debug info>} $hex <_start>
gdb_test "print _start" " = {void \\(\\)} $hex <_start>"