gdb/testsuite/gdb.dwarf2/main-subprogram.exp

# Copyright 2016-2021 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/>.
load_lib dwarf.exp

# This test can only be run on targets which support DWARF-4 and use gas.
if {![dwarf2_support]} {
    return 0
}

standard_testfile .c -dw.S

# Make some DWARF for the test.
set asm_file [standard_output_file $srcfile2]
Dwarf::assemble $asm_file {
    global srcfile

    cu {} {
	DW_TAG_compile_unit {
                {DW_AT_language @DW_LANG_C}
                {DW_AT_name     $srcfile}
                {DW_AT_comp_dir /tmp}
        } {
	    declare_labels type

            type: DW_TAG_base_type {
                {DW_AT_byte_size 4 DW_FORM_sdata}
                {DW_AT_encoding  @DW_ATE_signed}
                {DW_AT_name      int}
            }

	    DW_TAG_subprogram {
		{MACRO_AT_func {mymain}}
		{type :$type}
		{DW_AT_main_subprogram 1 flag}
	    } {
	    }
	}
    }
}

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

set have_index [exec_has_index_section $binfile]

# Test that the "start" command stops in the "mymain" function.
# This should happen because we used DW_AT_main_subprogram to tell gdb
# that this was the real "main".

if {[gdb_start_cmd] < 0} {
    untested "could not start ${testfile}"
    return -1
}

gdb_test_multiple "" "stopped at mymain" {
    -re -wrap "Temporary breakpoint .* mymain.*" {
	pass $gdb_test_name
    }
    -re -wrap "Temporary breakpoint .* main.*" {
	if { $have_index } {
	    setup_kfail "gdb/24549" *-*-*
	}
	fail $gdb_test_name
    }
}