gdb/testsuite/gdb.dwarf2/dw2-inline-with-lexical-scope.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 that scoped local variables in an inlined function are printed
# properly.

load_lib dwarf.exp

# This test can only be run on targets that support DWARF-2 and use
# gas.
if {![dwarf2_support]} {
    return 0
}

standard_testfile .c .S

# Make some DWARF for the test.  The concrete inlined instance
# (i.e. the DW_TAG_inlined_subroutine) has a DW_TAG_lexical_block that
# does not contain a DW_AT_abstract_origin attribute.  This is
# deliberate.  Bad GDB printed duplicate local variables with
# "optimized out" values in this case.

set asm_file [standard_output_file $srcfile2]
Dwarf::assemble $asm_file {
    global srcfile srcdir subdir
    declare_labels int_label func_label num_label value_label lines_label

    get_func_info main
    set func_call [gdb_get_line_number "func call"]

    set global_num_addr [gdb_target_symbol global_num]
    set global_value_addr [gdb_target_symbol global_value]

    cu {} {
	compile_unit {
	    {language @DW_LANG_C99}
	    {name $srcfile}
	    {low_pc $main_start addr}
	    {high_pc "$main_start + $main_len" addr}
	    {stmt_list ${lines_label} DW_FORM_sec_offset}
	} {
	    int_label: base_type {
		{name "int"}
		{byte_size 4 sdata}
		{encoding @DW_ATE_signed}
	    }

	    func_label: subprogram {
		{name func}
		{inline @DW_INL_declared_inlined}
	    } {
		num_label: DW_TAG_variable {
		    {name num}
		    {type :$int_label}
		}
		lexical_block {
		} {
		    value_label: DW_TAG_variable {
			{name value}
			{type :$int_label}
		    }
		}
	    }

	    subprogram {
		{name main}
		{external 1 flag}
		{low_pc $main_start addr}
		{high_pc "$main_start + $main_len" addr}
	    } {
		inlined_subroutine {
		    {abstract_origin %$func_label}
		    {low_pc main_label addr}
		    {high_pc main_label2 addr}
		    {call_file 1 data1}
		    {call_line $func_call data1}
		} {
		    DW_TAG_variable {
			{abstract_origin %$num_label}
			{location {addr $global_num_addr} SPECIAL_expr}
		    }
		    lexical_block {
			{low_pc scope_label1 addr}
			{high_pc scope_label2 addr}
		    } {
			DW_TAG_variable {
			    {abstract_origin %$value_label}
			    {location {addr $global_value_addr} SPECIAL_expr}
			}
		    }
		}
	    }
	}
    }

    lines {version 2} lines_label {
	include_dir "${srcdir}/${subdir}"
	file_name "$srcfile" 1

	program {
	    {DW_LNE_set_address $main_start}
	    {line [gdb_get_line_number "main prologue"]}
	    {DW_LNS_copy}
	    {DW_LNE_set_address main_label}
	    {line [gdb_get_line_number "func call"]}
	    {DW_LNS_copy}
	    {DW_LNE_set_address main_label}
	    {line [gdb_get_line_number "func end"]}
	    {DW_LNS_copy}
	    {DW_LNE_set_address main_label2}
	    {line [gdb_get_line_number "main end"]}
	    {DW_LNS_copy}
	    {DW_LNE_set_address $main_end}
	    {DW_LNE_end_sequence}
	}
    }
}

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

runto breakpoint_label

# Bad GDB was printing an additional "value = <optimized out>".
gdb_test "info locals" "value = 42\r\nnum = 42"