gdb/testsuite/gdb.dwarf2/loc-sec-offset.exp

# Copyright 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/>.

# Test DW_AT_location attribute referencing the .debug_loc section using
# the DW_FORM_sec_offset form.

load_lib dwarf.exp

if {![dwarf2_support]} {
    return 0
}

# Test with 32-bit and 64-bit DWARF.
foreach_with_prefix is_64 {false true} {
    if { $is_64 } {
	standard_testfile .c -dw64.S
	set testfile ${testfile}-dw64
    } else {
	standard_testfile .c -dw32.S
	set testfile ${testfile}-dw32
    }

    lassign [function_range func1 $srcdir/$subdir/$srcfile] \
	func1_addr func1_len
    lassign [function_range func2 $srcdir/$subdir/$srcfile] \
	func2_addr func2_len

    set asm_file [standard_output_file $srcfile2]
    Dwarf::assemble $asm_file {
	global func1_addr func1_len
	global func2_addr func2_len
	global is_64

	set cu_version 4

	cu {
	    version $cu_version
	    is_64 $is_64
	} {
	    declare_labels int_type1
	    declare_labels foo_location_list

	    DW_TAG_compile_unit {
	    } {
		int_type1: DW_TAG_base_type {
		    {DW_AT_byte_size 4 DW_FORM_data1}
		    {DW_AT_encoding @DW_ATE_signed}
		    {DW_AT_name "int"}
		}

		DW_TAG_variable {
		    {DW_AT_name "foo"}
		    {DW_AT_location $foo_location_list DW_FORM_sec_offset}
		    {DW_AT_type :$int_type1}
		}

		DW_TAG_subprogram {
		    {DW_AT_name "func1"}
		    {DW_AT_low_pc $func1_addr}
		    {DW_AT_high_pc $func1_len DW_FORM_udata}
		}

		DW_TAG_subprogram {
		    {DW_AT_name "func2"}
		    {DW_AT_low_pc $func2_addr}
		    {DW_AT_high_pc $func2_len DW_FORM_udata}
		}
	    }
	}

	# Generate a .debug_loc contribution.
	loc {
	    cu_is_64 $is_64
	    cu_version $cu_version
	} {
	    foo_location_list:
	    entry $func1_addr "$func1_addr + $func1_len" {
		DW_OP_constu 0x123456
		DW_OP_stack_value
	    }
	    entry $func2_addr "$func2_addr + $func2_len" {
		DW_OP_constu 0x234567
		DW_OP_stack_value
	    }
	}
    }

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

    if { ![runto_main] } {
	return
    }

    gdb_breakpoint "func1"
    gdb_breakpoint "func2"

    gdb_continue_to_breakpoint "func1"
    with_test_prefix "at func1" {
	gdb_test "print /x foo" " = 0x123456"
    }

    gdb_continue_to_breakpoint "func2"
    with_test_prefix "at func2" {
	gdb_test "print /x foo" " = 0x234567"
    }
}