gdb/testsuite/gdb.dwarf2/corrupt.exp

# Copyright 2014-2026 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 corrupt DWARF input
# PR gdb/15827

load_lib dwarf.exp

require dwarf2_support

standard_testfile main.c .S

# Make the DWARF used for the test.
#
# Here we put DW_AT_sibling DIEs into the output which
# point off into la-la land.  The whole purpose is to simulate
# corrupt DWARF information and make sure that GDB can handle it
# without crashing.

set asm_file [standard_output_file $srcfile2]
Dwarf::assemble $asm_file {
    cu {} {
	compile_unit {} {
	    declare_labels int_label

	    int_label: base_type {
		DW_AT_byte_size 4 sdata
		DW_AT_name "int"
	    }

	    enumeration_type {
		DW_AT_name "ENUM"
		DW_AT_byte_size 4 sdata
	    } {
		enumerator {
		    DW_AT_name "A"
		    DW_AT_const_value 0 sdata
		}
		enumerator {
		    DW_AT_name "B"
		    DW_AT_const_value 1 sdata
		    DW_AT_sibling 12345678 DW_FORM_ref4
		} {
		    base_type {
			DW_AT_byte_size 1 sdata
			DW_AT_name "char"
		    }
		}
		array_type {
		    DW_AT_type :$int_label
		    DW_AT_sibling 12345678 DW_FORM_ref4
		}
	    }
	}
    }
}

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

gdb_test "print 1" "= 1" "recover from corrupt DWARF"