gdb/testsuite/gdb.dwarf2/dwz-unused-pu.exp

# Copyright 2024-2025 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/>.

# Check that a symbol from an unused PU is not accessible.

load_lib dwarf.exp

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

standard_testfile main.c -dw.S

# Create the DWARF.
set asm_file [standard_output_file $srcfile2]
Dwarf::assemble $asm_file {
    declare_labels partial_label int_label int_label2

    cu {} {
	compile_unit {{language @DW_LANG_C}} {
	    subprogram {
		{MACRO_AT_func { main }}
	    }
	}
    }

    cu {} {
	partial_unit {} {
	    int_label: base_type {
		{name int}
		{byte_size 4 sdata}
		{encoding @DW_ATE_signed}
	    }

	    constant {
		{name the_int}
		{type :$int_label}
		{const_value 99 data1}
	    }
	}
    }
}

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

set cmd "p the_int"
set re \
    [string_to_regexp \
	 {No symbol "the_int" in current context.}]

# Check that the unreferenced PU is not expanded.
gdb_test $cmd $re

# This should expand all CUs and referenced PUs, but not an unreferenced PU.
gdb_test_no_output "maint expand-symtabs"

# Flush the symbol cache to do a new symbol lookup.
gdb_test_no_output "maint flush symbol-cache"

# Check that the unreferenced PU is not expanded after "maint expand-symtabs".
gdb_test $cmd $re "$cmd, again"