8d83f51b91
Building gdb with gcc 7.5.0 and -flto -O2 -flto-partition=one generates a
self-referencing DIE:
...
<2><91dace>: Abbrev Number: 405 (DW_TAG_label)
<91dad0> DW_AT_abstract_origin: <0x91dace>
...
When encountering the self-reference DIE in inherit_abstract_dies we loop
following the abstract origin, effectively hanging gdb.
Fix this by handling self-referencing DIEs in the loop in
inherit_abstract_dies.
Tested on x86_64-linux.
Approved-By: Tom Tromey <tom@tromey.com>
PR symtab/30799
https://sourceware.org/bugzilla/show_bug.cgi?id=30799
66 lines
1.8 KiB
Text
66 lines
1.8 KiB
Text
# Copyright 2023 Free Software Foundation, Inc.
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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# Check that gdb doesn't hang or segfault on reading a DIE with a
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# specification/abstract_origin reference to itself.
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load_lib dwarf.exp
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require dwarf2_support
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standard_testfile main.c .S
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# Create the DWARF.
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set asm_file [standard_output_file $srcfile2]
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Dwarf::assemble $asm_file {
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cu {} {
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compile_unit {{language @DW_LANG_C_plus_plus}} {
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# Check handling of self-referencing DIE.
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declare_labels c1
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c1: class_type {
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{name c1}
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{specification :$c1}
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}
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# Check handling of self-referencing child DIE. Regression test
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# for PR30799.
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declare_labels f1 abstract_f1 f1_l
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abstract_f1: subprogram {}
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f1: subprogram {
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{MACRO_AT_func {main}}
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{abstract_origin :$abstract_f1}
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} {
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f1_l: label {
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{abstract_origin :$f1_l}
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}
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}
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}
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}
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}
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if [prepare_for_testing "failed to prepare" $testfile "${asm_file} ${srcfile}" {}] {
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return -1
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}
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set index [have_index $binfile]
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require {string eq $index ""}
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require !readnow
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gdb_test "maint print objfiles $testfile" \
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"\r\n *qualified: *c1\r\n.*" \
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"class c1 in cooked index"
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gdb_test "maint expand-symtabs"
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