# Copyright 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/>.

# Test DW_AT_ranges attributes referencing the .debug_rnglists section using the
# DW_FORM_sec_offset form.

load_lib dwarf.exp

if {![dwarf2_support]} {
    return 0
}

foreach_with_prefix is_64 {false true} {
    if { $is_64 } {
	standard_testfile main.c -dw64.S
	set testfile ${testfile}-dw64
    } else {
	standard_testfile main.c -dw32.S
	set testfile ${testfile}-dw32
    }

    set asm_file [standard_output_file $srcfile2]
    Dwarf::assemble $asm_file {
	global is_64

	declare_labels cu1_range_list cu2_range_list cu3_range_list
	declare_labels foo_range_list bar_range_list baz_range_list

	# This CU uses the DW_FORM_sec_offset form to refer to the .debug_rnglists
	# section.
	cu {
	    version 5
	    is_64 $is_64
	} {
	    DW_TAG_compile_unit {
		{DW_AT_ranges $cu1_range_list DW_FORM_sec_offset}
	    } {
		DW_TAG_subprogram {
		    {DW_AT_name "foo"}
		    {DW_AT_ranges $foo_range_list DW_FORM_sec_offset}
		}
	    }
	}

	# This CU uses the DW_FORM_sec_offset form to refer to the
	# .debug_rnglists section, but also has the DW_AT_rnglists_base
	# attribute present.  The DW_AT_rnglists_base attribute is not used to
	# interpret the DW_AT_ranges value, but it should also do no harm.
	cu {
	    version 5
	    is_64 $is_64
	} {
	    DW_TAG_compile_unit {
		{DW_AT_ranges $cu2_range_list DW_FORM_sec_offset}
		{DW_AT_rnglists_base cu2_table DW_FORM_sec_offset}
	    } {
		DW_TAG_subprogram {
		    {DW_AT_name "bar"}
		    {DW_AT_ranges $bar_range_list DW_FORM_sec_offset}
		}
	    }
	}

	# This CU uses the DW_FORM_sec_offset form to refer to the .debug_rnglists
	# section.  The corresponding contribution in the .debug_rnglists has no
	# offset array.
	cu {
	    version 5
	    is_64 $is_64
	} {
	    DW_TAG_compile_unit {
		{DW_AT_ranges $cu3_range_list DW_FORM_sec_offset}
	    } {
		DW_TAG_subprogram {
		    {DW_AT_name "baz"}
		    {DW_AT_ranges $baz_range_list DW_FORM_sec_offset}
		}
	    }
	}

	rnglists {is-64 $is_64} {
	    # The lists in this table are accessed by direct offset
	    # (DW_FORM_sec_offset).
	    table {} {
		# For the first CU.
		cu1_range_list: list_ {
		    start_end 0x4000 0x5000
		}

		# For function foo.
		foo_range_list: list_ {
		    start_end 0x4000 0x4010
		}
	    }

	    table {post-header-label cu2_table} {
		# For the second CU.
		cu2_range_list: list_ {
		    start_end 0x5000 0x6000
		}

		# For the bar function.
		bar_range_list: list_ {
		    start_end 0x5000 0x5010
		}
	    }

	    table {with-offset-array false} {
		# For the third CU.
		cu3_range_list: list_ {
		    start_end 0x6000 0x7000
		}

		# For the baz function.
		baz_range_list: list_ {
		    start_end 0x6000 0x6010
		}
	    }
	}
    }

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

    # Sanity checks to make sure GDB slurped the symbols correctly.
    gdb_test "p/x &foo" " = 0x4000"
    gdb_test "p/x &bar" " = 0x5000"
    gdb_test "p/x &baz" " = 0x6000"
}