testsuite/gdb.dwarf2/dw2-lines.exp

# Copyright 2021-2024 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/>.

# Test line number information in various configurations.

load_lib dwarf.exp

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

standard_testfile .c

with_shared_gdb {
    set func_info_vars \
	[concat \
	     [get_func_info main] \
	     [get_func_info bar]]
}

# Helper function.
proc line_for { l } {
    global srcfile
    set line [gdb_get_line_number "$l:" $srcfile]
    return [expr $line + 1]
}

# Execute test.
proc test_1 { _cv _cdw64 _lv _ldw64 {_string_form ""}} {
    global srcfile srcfile2 testfile
    global cv cdw64 lv ldw64 string_form
    set cv $_cv
    set cdw64 $_cdw64
    set lv $_lv
    set ldw64 $_ldw64
    set string_form $_string_form

    standard_testfile .c [prefix_id]-dw.S

    set asm_file [standard_output_file $srcfile2]
    Dwarf::assemble $asm_file {
	declare_labels Llines
	global srcdir subdir srcfile cv cdw64 lv ldw64 string_form
	global func_info_vars
	foreach var $func_info_vars {
	    global $var
	}

	cu { version $cv is_64 $cdw64 } {
	    compile_unit {
		{language @DW_LANG_C}
		{name $srcfile}
		{stmt_list $Llines DW_FORM_sec_offset}
	    } {
		subprogram {
		    {external 1 flag}
		    {name main}
		    {low_pc $main_start addr}
		    {high_pc "$main_start + $main_len" addr}
		}
		subprogram {
		    {external 1 flag}
		    {name bar}
		    {low_pc $bar_start addr}
		    {high_pc "$bar_start + $bar_len" addr}
		}
	    }
	}

	lines [list version $lv is_64 $ldw64 string_form $string_form] Llines {
	    set diridx [include_dir "${srcdir}/${subdir}"]
	    file_name "$srcfile" $diridx

	    program {
		# If using DWARF 5, we want to refer to file 0, but the LNP
		# state machine is still initialized with file 1.  So we need
		# to set the current file explicitly.
		DW_LNS_set_file $diridx

		DW_LNE_set_address bar_label
		line [line_for bar_label]
		DW_LNS_copy

		DW_LNE_set_address bar_label_2
		line [line_for bar_label_2]
		DW_LNS_copy

		DW_LNE_set_address bar_label_3
		line [line_for bar_label_3]
		DW_LNS_copy

		DW_LNE_set_address bar_label_4
		line [line_for bar_label_4]
		DW_LNS_copy

		DW_LNE_set_address "$bar_start + $bar_len"
		DW_LNE_end_sequence
	    }
	}
    }

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

    if ![runto_main] {
	return -1
    }

    gdb_breakpoint "bar_label"
    gdb_continue_to_breakpoint "foo \\(1\\)"

    gdb_test "next" "foo \\(2\\).*" "next to foo (2)"
    gdb_test "next" "foo \\(3\\).*" "next to foo (3)"
    gdb_test "next" "foo \\(4\\).*" "next to foo (4)"
}


# Add unique test prefix.
proc test { cv cdw64 lv ldw64 {string_form ""}} {
    with_test_prefix cv=$cv {
	with_test_prefix cdw=[expr $cdw64 ? 64 : 32] {
	    with_test_prefix lv=$lv {
		with_test_prefix ldw=[expr $ldw64 ? 64 : 32] {
		    if { $string_form == "" } {
			test_1 $cv $cdw64 $lv $ldw64
		    } else {
			with_test_prefix string_form=$string_form {
			    test_1 $cv $cdw64 $lv $ldw64 $string_form
			}
		    }
		}
	    }
	}
    }
}

set cv_low 2
set cv_high 4

set lv_low 2
set lv_high 4

for { set cv $cv_low } { $cv <= $cv_high } { incr cv } {
    for { set lv $lv_low } { $lv <= $lv_high } { incr lv } {
	# I'm not sure if it makes sense to have a dwarf vx CU with
	# a dwarf vx+1 line unit.
	if { $lv > $lv } {
	    continue
	}

	foreach cdw64 { 0 1 } {
	    foreach ldw64 { 0 1 } {
		test $cv $cdw64 $lv $ldw64
	    }
	}
    }
}

foreach cdw64 { 0 1 } {
    foreach ldw64 { 0 1 } {
	test 5 $cdw64 5 $ldw64 string
	test 5 $cdw64 5 $ldw64 line_strp
    }
}