@@ -7103,6 +7103,8 @@ skip_one_die (const struct die_reader_specs *reader, const gdb_byte *info_ptr,
if (sibling_ptr < info_ptr)
complaint (&symfile_complaints,
_("DW_AT_sibling points backwards"));
+ else if (sibling_ptr > reader->buffer_end)
+ dwarf2_section_buffer_overflow_complaint (reader->die_section);
else
return sibling_ptr;
}
@@ -15416,6 +15418,8 @@ read_partial_die (const struct die_reader_specs *reader,
if (sibling_ptr < info_ptr)
complaint (&symfile_complaints,
_("DW_AT_sibling points backwards"));
+ else if (sibling_ptr > reader->buffer_end)
+ dwarf2_section_buffer_overflow_complaint (reader->die_section);
else
part_die->sibling = sibling_ptr;
}
new file mode 100644
@@ -0,0 +1,24 @@
+/* This testcase is part of GDB, the GNU debugger.
+
+ Copyright 2014 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/>. */
+
+/* Dummy main function. */
+
+int
+main()
+{
+ return 0;
+}
new file mode 100644
@@ -0,0 +1,78 @@
+# Copyright 2014 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
+
+if {![dwarf2_support]} {
+ return 0
+}
+
+standard_testfile corrupt.c corrupt.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 $asm_file {
+ cu {} {
+ compile_unit {} {
+ declare_labels int_label
+
+ int_label: base_type {
+ {byte_size 4}
+ {name "int"}
+ }
+
+ enumeration_type {
+ {name "ENUM"}
+ {byte_size 4}
+ } {
+ enumerator {
+ {name "A"}
+ {const_value 0}
+ }
+ enumerator {
+ {name "B"}
+ {const_value 1}
+ {sibling 12345678 DW_FORM_ref4}
+ } {
+ base_type {
+ {byte_size 1}
+ {name "char"}
+ }
+ }
+ array_type {
+ {type :$int_label}
+ {sibling 12345678 DW_FORM_ref4}
+ }
+ }
+ }
+ }
+}
+
+if {[prepare_for_testing $testfile.exp $testfile \
+ [list $srcfile $asm_file] {nodebug}]} {
+ return -1
+}
+
+# If we get here and gdb hasn't crashed, the tests pass.
+pass "corrupt DWARF"