# 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/>.

# Setup a line table where:
#
# | Addr | File | Line | Stmt | Inline |
# |------|------|------|------|--------|
# | 1    | 1    | 16   | Y    |        |
# | 2    | 1    | 17   | Y    |        |
# | 3    | 2    | 21   | Y    | X      |
# | 4    | 2    | 22   | Y    | X      |
# | 4    | 1    | 18   | N    | X      |
# | 5    | 1    | 19   | Y    |        |
# | 6    | 1    | 20   | Y    |        |
# | 7    | 1    | END  | Y    |        |
# |------|------|------|------|--------|
#
#
# Place the first brekpoint at file 2, line 22 and a second breakpoint
# at file 1, line 19.  A third breakpoint is placed at file 1, line
# 18, but as this line table entry will have been discarded[1] the
# third breakpoint will actually be placed at the same location as the
# second breakpoint.
#
# This test is designed to test GDB's internal behaviour with respect
# to discarding particular line table entries.  GCC and DWARF are
# starting to introduce the idea of line table views.  As the views
# information becomes better supported within GDB it is likely that
# this will become out of date.  This is fine, the test will have
# served its purpose by that point and can be deleted.
#
# [1] The entry for file 1, line 18 is discarded because it is at the
# same address as the previous entry, but the previous entry is-stmt,
# while line 18 is a non-stmt.

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 [get_compiler_info] {
    return -1
}
if !$gcc_compiled {
    return 0
}

standard_testfile dw2-inline-header-lbls.c dw2-inline-header.S \
    dw2-inline-header.c dw2-inline-header.h

set build_options {nodebug optimize=-O1}

set asm_file [standard_output_file $srcfile2]
Dwarf::assemble $asm_file {
    global srcdir subdir srcfile srcfile3 srcfile4
    global build_options
    declare_labels lines_label callee_subprog_label

    get_func_info main $build_options

    cu {} {
	compile_unit {
	    {producer "gcc" }
	    {language @DW_LANG_C}
	    {name ${srcfile3}}
	    {low_pc 0 addr}
	    {stmt_list ${lines_label} DW_FORM_sec_offset}
	} {
	    callee_subprog_label: subprogram {
		{external 1 flag}
		{name callee}
		{inline 3 data1}
	    }
	    subprogram {
		{external 1 flag}
		{name main}
		{low_pc $main_start addr}
		{high_pc "$main_start + $main_len" addr}
	    } {
		inlined_subroutine {
		    {abstract_origin %$callee_subprog_label}
		    {low_pc line_label_3 addr}
		    {high_pc line_label_5 addr}
		    {call_file 1 data1}
		    {call_line 18 data1}
		}
	    }
	}
    }

    lines {version 2 default_is_stmt 1} lines_label {
	include_dir "${srcdir}/${subdir}"
	file_name "$srcfile3" 1
	file_name "$srcfile4" 1

	program {
	    {DW_LNE_set_address line_label_1}
	    {DW_LNS_advance_line 15}
	    {DW_LNS_copy}

	    {DW_LNE_set_address line_label_2}
	    {DW_LNS_advance_line 1}
	    {DW_LNS_copy}

	    {DW_LNS_set_file 2}
	    {DW_LNE_set_address line_label_3}
	    {DW_LNS_advance_line 4}
	    {DW_LNS_copy}

	    {DW_LNE_set_address line_label_4}
	    {DW_LNS_advance_line 1}
	    {DW_LNS_copy}

	    {DW_LNS_advance_line -4}
	    {DW_LNS_set_file 1}
	    {DW_LNS_negate_stmt}
	    {DW_LNS_copy}

	    {DW_LNE_set_address line_label_5}
	    {DW_LNS_advance_line 1}
	    {DW_LNS_negate_stmt}
	    {DW_LNS_copy}

	    {DW_LNE_set_address line_label_6}
	    {DW_LNS_advance_line 1}
	    {DW_LNS_copy}

	    {DW_LNE_set_address line_label_7}
	    {DW_LNE_end_sequence}
	}
    }
}

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

if ![runto_main] {
    return -1
}

# Delete all breakpoints so that the output of "info breakpoints"
# below will only contain a single breakpoint.
delete_breakpoints

# Place a breakpoint within the function in the header file.
gdb_breakpoint "${srcfile4}:22"

# Check that the breakpoint was placed where we expected.  It should
# appear at the requested line.  When the bug in GDB was present the
# breakpoint would be placed on one of the following lines instead.
gdb_test "info breakpoints" \
    ".* in callee at \[^\r\n\]+${srcfile4}:22\\y.*" \
    "check for breakpoint at ${srcfile4}"

# Delete all breakpoints so that the output of "info breakpoints"
# below will only contain a single breakpoint.
delete_breakpoints

# Place a breakpoint within the function in the header file.
gdb_breakpoint "${srcfile3}:19"

# Check that the breakpoint was placed where we expected.  It should
# appear at the requested line.  When the bug in GDB was present the
# breakpoint would be placed on one of the following lines instead.
gdb_test "info breakpoints" \
    ".* in main at \[^\r\n\]+${srcfile3}:19\\y.*" \
    "check for breakpoint at ${srcfile3}"

# Line table entry for line 18 will have been discarded, so this
# brekpoint will be at the same location as line 19.
gdb_test "break ${srcfile3}:18" \
    "Note: breakpoint $decimal also set at pc $hex.*"