Azat Khuzhin
bf4df5c6bb
Fix SIGSEGV for build under gcc-11 (due to auto deduction)
...
During building with gcc-11 you will got SIGSEGV for building
InterpretersMySQLDDLQuery (and some others), and it is due to endless
recursion:
(gdb) bt 5
0 0x00000000010978f2 in structural_comptypes (t1=0x7fde028c7dc8, t2=0x7fde028d1e70, strict=0) at ../../src/gcc/cp/typeck.c:1274
1 0x00000000011c3f9d in comp_template_parms (parms1=<optimized out>, parms2=<optimized out>) at ../../src/gcc/cp/pt.c:3369
2 0x0000000001097bd9 in structural_comptypes (t1=0x7fde028c7dc8, t2=0x7fde028d1e70, strict=<optimized out>) at ../../src/gcc/cp/typeck.c:1361
3 0x00000000011c3f9d in comp_template_parms (parms1=<optimized out>, parms2=<optimized out>) at ../../src/gcc/cp/pt.c:3369
4 0x0000000001097bd9 in structural_comptypes (t1=0x7fde028c7dc8, t2=0x7fde028d1e70, strict=<optimized out>) at ../../src/gcc/cp/typeck.c:1361
(gdb) bt -X
1397454 0x0000000001097bd9 in structural_comptypes (t1=0x7fde028d1540, t2=0x7fde028d27e0, strict=<optimized out>) at ../../src/gcc/cp/typeck.c:1361
1397455 0x0000000000f2d8b5 in cp_tree_equal (t1=<optimized out>, t2=<optimized out>) at ../../src/gcc/cp/tree.c:4144
1397456 0x00000000010909cb in template_args_equal (ot=0x7fde028cf578, nt=0x7fde028cfc58, partial_order=<optimized out>) at ../../src/gcc/cp/pt.c:9256
1397457 0x0000000001090422 in template_args_equal (partial_order=false, nt=0x7fde028cfc58, ot=0x7fde028cf578) at ../../src/gcc/cp/pt.c:9295
1397458 comp_template_args (oldargs=0x7fde028cf550, newargs=0x7fde028cfc30, oldarg_ptr=0x0, newarg_ptr=0x0, partial_order=false) at ../../src/gcc/cp/pt.c:9285
1397459 0x00000000010a08f4 in spec_hasher::equal (e1=0x7fde028c95d0, e2=0x7ffd1194e8c0) at ../../src/gcc/cp/pt.c:1726
1397460 0x0000000001085965 in hash_table<spec_hasher, false, xcallocator>::find_with_hash (this=0x7fde36b7f450, comparable=@0x7ffd1194e8b8: 0x7ffd1194e8c0, hash=<optimized out>) at ../../src/gcc/hash-table.h:936
1397461 0x0000000001079698 in lookup_template_class_1 (d1=<optimized out>, arglist=0x7fde028cfc30, in_decl=0x0, context=<optimized out>, entering_scope=<optimized out>, complain=3) at ../../src/gcc/cp/pt.c:9896
1397462 0x000000000109f8ef in lookup_template_class (complain=3, entering_scope=1, context=0x7fde27558e40, in_decl=0x0, arglist=0x7fde028cfc08, d1=0x7fde269bcd20) at ../../src/gcc/cp/pt.c:10251
1397463 tsubst_aggr_type (t=0x7fde269bcd20, args=<optimized out>, complain=3, in_decl=0x0, entering_scope=1) at ../../src/gcc/cp/pt.c:13646
1397464 0x000000000108f797 in tsubst (t=0x7fde269bcdc8, args=0x7fde028cf7a8, complain=3, in_decl=<optimized out>) at ../../src/gcc/cp/pt.c:16108
1397465 0x0000000000e61bf2 in rewrite_template_parm (level=1, complain=3, tsubst_args=0x7fde028cf7a8, index=5, olddecl=0x7fde269b5600) at ../../src/gcc/cp/pt.c:28556
1397466 rewrite_tparm_list(tree_node*, unsigned int, unsigned int, tree_node*, unsigned int, int) [clone .constprop.0] (oldelt=0x7fde269bd190, index=5, targs=0x7fde028cf7a8, targs_index=4, complain=3, level=1) at ../../src/gcc/cp/pt.c:28640
1397467 0x00000000009f3748 in build_deduction_guide (type=type@entry=0x7fde26e13dc8, ctor=0x7fde269ac300, outer_args=outer_args@entry=0x0, complain=complain@entry=3) at ../../src/gcc/cp/pt.c:28769
1397468 0x00000000009f444f in ctor_deduction_guides_for (complain=3, tmpl=<optimized out>) at ../../src/gcc/cp/cp-tree.h:842
1397469 deduction_guides_for (tmpl=<optimized out>, any_dguides_p=<optimized out>, complain=3) at ../../src/gcc/cp/pt.c:29282
1397470 0x00000000008507a8 in do_class_deduction (complain=3, flags=1, init=<optimized out>, tmpl=0x7fde26e0f980, ptype=0x7fde028c7b28) at ../../src/gcc/cp/pt.c:29402
1397471 do_auto_deduction (type=0x7fde028c7b28, init=<optimized out>, auto_node=<optimized out>, complain=3, context=<optimized out>, outer_targs=<optimized out>, flags=1) at ../../src/gcc/cp/pt.c:29572
1397472 0x00000000007c9569 in finish_compound_literal (type=<optimized out>, compound_literal=0x7fde028c95b8, complain=3, fcl_context=fcl_functional) at ../../src/gcc/cp/semantics.c:3060
1397473 0x0000000001123a79 in cp_parser_functional_cast (parser=0x7fde27558da8, type=0x7fde028c7b28) at ../../src/gcc/cp/parser.c:30670
1397474 0x0000000000fd7873 in cp_parser_postfix_expression (parser=0x7fde27558da8, address_p=<optimized out>, cast_p=<optimized out>, member_access_only_p=<optimized out>, decltype_p=false, pidk_return=0x0) at ../../src/gcc/cp/parser.c:7437
1397475 0x0000000000fd4ddf in cp_parser_binary_expression (parser=0x7fde27558da8, cast_p=<optimized out>, no_toplevel_fold_p=false, decltype_p=<optimized out>, prec=PREC_NOT_OPERATOR, pidk=<optimized out>) at ../../src/gcc/cp/parser.c:9842
1397476 0x0000000000fd4595 in cp_parser_assignment_expression (parser=0x7fde27558da8, pidk=<optimized out>, cast_p=<optimized out>, decltype_p=<optimized out>) at ../../src/gcc/cp/parser.c:10146
1397477 0x0000000000fd3b90 in cp_parser_constant_expression (parser=0x7fde27558da8, allow_non_constant_p=2, non_constant_p=0x7ffd1194f1d7, strict_p=<optimized out>) at ../../src/gcc/cp/parser.c:10449
1397478 0x0000000000fcfdd5 in cp_parser_initializer_clause (non_constant_p=<optimized out>, parser=0x7fde27558da8) at ../../src/gcc/cp/parser.c:24253
1397479 cp_parser_initializer (parser=0x7fde27558da8, is_direct_init=<optimized out>, non_constant_p=<optimized out>, subexpression_p=<optimized out>) at ../../src/gcc/cp/parser.c:24193
1397480 0x000000000062e5d8 in cp_parser_decomposition_declaration (init_loc=0x7ffd1194f1d8, maybe_range_for_decl=0x7ffd1194f498, decl_specifiers=0x7ffd1194f1f0, parser=0x7fde27558da8) at ../../src/gcc/cp/parser.c:14734
1397481 cp_parser_simple_declaration (parser=0x7fde27558da8, function_definition_allowed_p=<optimized out>, maybe_range_for_decl=0x7ffd1194f498) at ../../src/gcc/cp/parser.c:14393
1397482 0x000000000109b870 in cp_parser_init_statement (parser=0x7fde27558da8, decl=0x7ffd1194f498) at ../../src/gcc/cp/parser.c:13420
1397483 0x00000000010996f0 in cp_parser_for (unroll=0, ivdep=false, parser=0x7fde27558da8) at ../../src/gcc/cp/parser.c:12708
1397484 cp_parser_iteration_statement (parser=0x7fde27558da8, if_p=0x0, ivdep=<optimized out>, unroll=<optimized out>) at ../../src/gcc/cp/parser.c:13343
1397485 0x0000000000fe5c46 in cp_parser_statement (parser=0x7fde27558da8, in_statement_expr=0x0, in_compound=<optimized out>, if_p=0x0, chain=0x0, loc_after_labels=0x0) at ../../src/gcc/cp/parser.c:11718
1397486 0x0000000000fe15ac in cp_parser_statement_seq_opt (in_statement_expr=<optimized out>, parser=<optimized out>) at ../../src/gcc/cp/parser.c:12201
1397487 cp_parser_compound_statement (parser=0x7fde27558da8, in_statement_expr=0x0, bcs_flags=<optimized out>, function_body=<optimized out>) at ../../src/gcc/cp/parser.c:12150
Interesting frame is 1397471, from which we can extract location:
(gdb) p line_table[0].info_ordinary.maps[line_table[0].info_ordinary.cache]
$54 = {
<line_map> = {
start_location = 1396581280
},
members of line_map_ordinary:
reason = LC_RENAME,
sysp = 0 '\000',
m_column_and_range_bits = 8,
m_range_bits = 0,
to_file = 0x3eb4bb0 "/ch/src/Interpreters/MySQL/InterpretersMySQLDDLQuery.cpp",
to_line = 46,
included_from = 0
}
By replicating SOURCE_LINE() macro from gcc-11 (libcpp/include/line-map.h):
/* Converts a map and a location_t to source line. */
inline linenum_type
SOURCE_LINE (const line_map_ordinary *ord_map, location_t loc)
{
return ((loc - ord_map->start_location)
>> ord_map->m_column_and_range_bits) + ord_map->to_line;
}
We got line 154:
(gdb) p ((input_location-1396581280) >> 8) + 46
$61 = 154
And this is:
auto [column_name_and_type, declare_column_ast] = std::tuple{columns_name_and_type.begin(), columns_definition->children.begin()};
After rewriting it, everything works correctly.
Also here is a reproducer for gcc-11 (and no failures for gcc-12, but
gcc-12 has other issues, like [1] and one more for hash table):
# cat /tmp/test.cpp
#include <tuple>
auto multi()
{
return std::tuple{1, 1};
}
double foo()
{
auto [a, b] = multi();
return a - b;
}
# g++-11 -std=gnu++20 -c -o /dev/null -isystem /ch/contrib/libcxx/include -nostdinc++ /tmp/test.cpp
g++-11: internal compiler error: Segmentation fault signal terminated program cc1plus
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-11/README.Bugs> for instructions.
# g++-12 -std=gnu++20 -c -o /dev/null -isystem /ch/contrib/libcxx/include -nostdinc++ /tmp/test.cpp
[1]: https://reviews.llvm.org/D122598
Signed-off-by: Azat Khuzhin <a.khuzhin@semrush.com>
2022-03-28 22:21:45 +03:00
