# Copyright 2019-2023 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/>.

# This test shows the importance of not corrupting the order of line
# table information.  When multiple lines are given for the same
# address the compiler usually lists these in the order in which we
# would expect to encounter them.  When stepping through nested inline
# frames the last line given for an address is assumed by GDB to be
# the most inner frame, and this is what GDB displays.
#
# If we corrupt the order of the line table entries then GDB will
# display the wrong line as being the inner most frame.

load_lib dwarf.exp

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

# The .c files use __attribute__.
if ![is_c_compiler_gcc] {
    return 0
}

standard_testfile .c .S

set asm_file [standard_output_file $srcfile2]
Dwarf::assemble $asm_file {
    global srcdir subdir srcfile srcfile2
    declare_labels ranges_label lines_label
    declare_labels aaa_label bbb_label ccc_label
    declare_labels ggg_label hhh_label iii_label

    get_func_info main
    get_func_info ddd
    get_func_info eee
    get_func_info fff
    get_func_info jjj
    get_func_info kkk

    set call_in_main [gdb_get_line_number "main call aaa"]
    set call_in_aaa [gdb_get_line_number "aaa return"]
    set call_in_bbb [gdb_get_line_number "bbb return"]
    set call_in_ccc [gdb_get_line_number "ccc return"]
    set call_in_fff [gdb_get_line_number "fff return"]
    set call_in_ggg [gdb_get_line_number "ggg return"]
    set call_in_hhh [gdb_get_line_number "hhh return"]
    set call_in_iii [gdb_get_line_number "iii return"]

    cu {} {
	compile_unit {
	    {language @DW_LANG_C}
	    {name dw2-inline-stepping.c}
	    {low_pc 0 addr}
	    {stmt_list ${lines_label} DW_FORM_sec_offset}
	    {ranges ${ranges_label} DW_FORM_sec_offset}
	} {
	    subprogram {
		{external 1 flag}
		{name ddd}
		{low_pc $ddd_start addr}
		{high_pc "$ddd_start + $ddd_len" addr}
	    }
	    subprogram {
		{external 1 flag}
		{name eee}
		{low_pc $eee_start addr}
		{high_pc "$eee_start + $eee_len" addr}
	    }
	    subprogram {
		{external 1 flag}
		{name jjj}
		{low_pc $jjj_start addr}
		{high_pc "$jjj_start + $jjj_len" addr}
	    }
	    subprogram {
		{external 1 flag}
		{name kkk}
		{low_pc $kkk_start addr}
		{high_pc "$kkk_start + $kkk_len" addr}
	    }
	    aaa_label: subprogram {
		{name aaa}
		{inline 3 data1}
	    }
	    bbb_label: subprogram {
		{name bbb}
		{inline 3 data1}
	    }
	    ccc_label: subprogram {
		{name ccc}
		{inline 3 data1}
	    }
	    ggg_label: subprogram {
		{name ggg}
		{inline 3 data1}
	    }
	    hhh_label: subprogram {
		{name hhh}
		{inline 3 data1}
	    }
	    iii_label: subprogram {
		{name iii}
		{inline 3 data1}
	    }
	    subprogram {
		{external 1 flag}
		{name main}
		{low_pc $main_start addr}
		{high_pc "$main_start + $main_len" addr}
	    } {
		inlined_subroutine {
		    {abstract_origin %$aaa_label}
		    {low_pc main_label2 addr}
		    {high_pc main_label3 addr}
		    {call_file 1 data1}
		    {call_line $call_in_main data1}
		} {
		    inlined_subroutine {
			{abstract_origin %$bbb_label}
			{low_pc main_label2 addr}
			{high_pc main_label3 addr}
			{call_file 1 data1}
			{call_line $call_in_aaa data1}
		    }  {
			inlined_subroutine {
			    {abstract_origin %$ccc_label}
			    {low_pc main_label2 addr}
			    {high_pc main_label3 addr}
			    {call_file 1 data1}
			    {call_line $call_in_bbb data1}
			}
		    }
		}
	    }
	    subprogram {
		{external 1 flag}
		{name fff}
		{low_pc $fff_start addr}
		{high_pc "$fff_start + $fff_len" addr}
	    }  {
		inlined_subroutine {
		    {abstract_origin %$ggg_label}
		    {low_pc fff_label addr}
		    {high_pc main_label2 addr}
		    {call_file 1 data1}
		    {call_line $call_in_fff data1}
		} {
		    inlined_subroutine {
			{abstract_origin %$hhh_label}
			{low_pc fff_label addr}
			{high_pc fff_label2 addr}
			{call_file 1 data1}
			{call_line $call_in_ggg data1}
		    }  {
			inlined_subroutine {
			    {abstract_origin %$iii_label}
			    {low_pc fff_label addr}
			    {high_pc fff_label2 addr}
			    {call_file 1 data1}
			    {call_line $call_in_hhh data1}
			}
		    }
		}
	    }
	}
    }

    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 "main set global_var"]
	    DW_LNS_copy
	    DW_LNE_set_address main_label2
	    line [gdb_get_line_number "main call aaa"]
	    DW_LNS_copy
	    DW_LNE_set_address main_label2
	    line [gdb_get_line_number "aaa return"]
	    DW_LNS_copy
	    DW_LNE_set_address main_label2
	    line [gdb_get_line_number "bbb return"]
	    DW_LNS_copy
	    DW_LNE_set_address main_label2
	    line [gdb_get_line_number "ccc return"]
	    DW_LNS_copy
	    DW_LNE_set_address main_label3
	    line [gdb_get_line_number "main end"]
	    DW_LNS_copy
	    DW_LNE_set_address $main_end
	    DW_LNE_end_sequence

	    DW_LNE_set_address $ddd_start
	    line [gdb_get_line_number "ddd prologue"]
	    DW_LNS_copy
	    DW_LNE_set_address ddd_label
	    line [gdb_get_line_number "ddd return"]
	    DW_LNS_copy
	    DW_LNE_set_address ddd_label2
	    line [gdb_get_line_number "ddd end"]
	    DW_LNS_copy
	    DW_LNE_set_address $ddd_end
	    DW_LNE_end_sequence

	    DW_LNE_set_address $eee_start
	    line [gdb_get_line_number "eee prologue"]
	    DW_LNS_copy
	    DW_LNE_set_address eee_label
	    line [gdb_get_line_number "eee return"]
	    DW_LNS_copy
	    DW_LNE_set_address eee_label2
	    line [gdb_get_line_number "eee end"]
	    DW_LNS_copy
	    DW_LNE_set_address $eee_end
	    DW_LNE_end_sequence

	    DW_LNE_set_address $fff_start
	    line [gdb_get_line_number "fff prologue"]
	    DW_LNS_copy
	    DW_LNE_set_address fff_label
	    line [gdb_get_line_number "fff return"]
	    DW_LNS_copy
	    DW_LNE_set_address fff_label
	    line [gdb_get_line_number "ggg return"]
	    DW_LNS_copy
	    DW_LNE_set_address fff_label
	    line [gdb_get_line_number "hhh return"]
	    DW_LNS_copy
	    DW_LNE_set_address fff_label
	    line [gdb_get_line_number "iii return"]
	    DW_LNS_copy
	    DW_LNE_set_address fff_label2
	    line [gdb_get_line_number "fff end"]
	    DW_LNS_copy
	    DW_LNE_set_address $fff_end
	    DW_LNE_end_sequence

	    DW_LNE_set_address $jjj_start
	    line [gdb_get_line_number "jjj prologue"]
	    DW_LNS_copy
	    DW_LNE_set_address jjj_label
	    line [gdb_get_line_number "jjj return"]
	    DW_LNS_copy
	    DW_LNE_set_address jjj_label2
	    line [gdb_get_line_number "jjj end"]
	    DW_LNS_copy
	    DW_LNE_set_address $jjj_end
	    DW_LNE_end_sequence

	    DW_LNE_set_address $kkk_start
	    line [gdb_get_line_number "kkk prologue"]
	    DW_LNS_copy
	    DW_LNE_set_address kkk_label
	    line [gdb_get_line_number "kkk return"]
	    DW_LNS_copy
	    DW_LNE_set_address $kkk_end
	    DW_LNE_end_sequence
	}
    }

    ranges {is_64 [is_64_target]} {
	ranges_label: sequence {
	    range ${main_start} ${main_end}
	    range ${ddd_start} ${ddd_end}
	    range ${eee_start} ${eee_end}
	    range ${fff_start} ${fff_end}
	    range ${jjj_start} ${jjj_end}
	    range ${kkk_start} ${kkk_end}
	}
    }
}

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

if ![runto_main] {
    return -1
}

# First we step through all of the functions until we get the 'kkk'.
set patterns [list "main call aaa" \
		  "aaa return" \
		  "bbb return" \
		  "ccc return" \
		  "ddd return" \
		  "eee return" \
		  "fff return" \
		  "ggg return" \
		  "hhh return" \
		  "iii return" \
		  "jjj return" \
		  "kkk return" ]
foreach p $patterns {
    gdb_test "step" "/\\* $p \\*/" \
	"step to '$p'"
}

# Now check the backtrace.
set line_in_main [gdb_get_line_number "main call aaa"]
set line_in_aaa [gdb_get_line_number "aaa return"]
set line_in_bbb [gdb_get_line_number "bbb return"]
set line_in_ccc [gdb_get_line_number "ccc return"]
set line_in_ddd [gdb_get_line_number "ddd return"]
set line_in_eee [gdb_get_line_number "eee return"]
set line_in_fff [gdb_get_line_number "fff return"]
set line_in_ggg [gdb_get_line_number "ggg return"]
set line_in_hhh [gdb_get_line_number "hhh return"]
set line_in_iii [gdb_get_line_number "iii return"]
set line_in_jjj [gdb_get_line_number "jjj return"]
set line_in_kkk [gdb_get_line_number "kkk return"]

gdb_test "bt" [multi_line \
		   "#0  kkk \\(\\) at \[^\r\n\]+${srcfile}:${line_in_kkk}" \
		   "#1  $hex in jjj \\(\\) at \[^\r\n\]+${srcfile}:${line_in_jjj}" \
		   "#2  $hex in iii \\(\\) at \[^\r\n\]+${srcfile}:${line_in_iii}" \
		   "#3  hhh \\(\\) at \[^\r\n\]+${srcfile}:${line_in_hhh}" \
		   "#4  ggg \\(\\) at \[^\r\n\]+${srcfile}:${line_in_ggg}" \
		   "#5  fff \\(\\) at \[^\r\n\]+${srcfile}:${line_in_fff}" \
		   "#6  $hex in eee \\(\\) at \[^\r\n\]+${srcfile}:${line_in_eee}" \
		   "#7  $hex in ddd \\(\\) at \[^\r\n\]+${srcfile}:${line_in_ddd}" \
		   "#8  $hex in ccc \\(\\) at \[^\r\n\]+${srcfile}:${line_in_ccc}" \
		   "#9  bbb \\(\\) at \[^\r\n\]+${srcfile}:${line_in_bbb}" \
		   "#10 aaa \\(\\) at \[^\r\n\]+${srcfile}:${line_in_aaa}" \
		   "#11 main \\(\\) at \[^\r\n\]+${srcfile}:${line_in_main}" ]

# Now check we can use 'up' to inspect each frame correctly.
set patterns [list  \
		  "jjj return" \
		  "iii return" \
		  "hhh return" \
		  "ggg return" \
		  "fff return" \
		  "eee return" \
		  "ddd return" \
		  "ccc return" \
		  "bbb return" \
		  "aaa return" \
		  "main call aaa" ]
foreach p $patterns {
    gdb_test "up" "/\\* $p \\*/" \
	"up to '$p'"
}