On Tue, Jul 17, 2018 at 3:08 PM Paul Koning <paulkon...@comcast.net> wrote:
>
>
> > On Jul 17, 2018, at 5:46 AM, Richard Biener <richard.guent...@gmail.com>
> > wrote:
> >
> >> ...
> >
> > There is not enough information for anyone to help you without
> > reproducing the issue which is maybe too much to ask for ;)
> >
> > Can you debug_tree () the offending decl in gdb?
>
> Yes, here it is. I don't know anything about debugging in this area, so
> tools like debug_tree are good to learn about. How would I interpret its
> output?
>
> pkoning:gcc pkoning$ lldb ./cc1plus -- new_opa.ii -fno-implicit-templates
> -Wall -Wextra -Wwrite-strings -Wcast-qual -Wabi
> -fdiagnostics-show-location=once -frandom-seed=new_opa.lo -g -O2 -std=gnu++1z
> (lldb) target create "./cc1plus"
> Current executable set to './cc1plus' (x86_64).
> (lldb) settings set -- target.run-args "new_opa.ii"
> "-fno-implicit-templates" "-Wall" "-Wextra" "-Wwrite-strings" "-Wcast-qual"
> "-Wabi" "-fdiagnostics-show-location=once" "-frandom-seed=new_opa.lo" "-g"
> "-O2" "-std=gnu++1z"
> (lldb) b internal_error
> Breakpoint 1: where = cc1plus`internal_error(char const*, ...) + 104 at
> diagnostic.c:1441, address = 0x0000000100c21378
> (lldb) run
> Process 10880 launched: './cc1plus' (x86_64)
> cc1plus: warning: -Wabi won't warn about anything [-Wabi]
> cc1plus: note: -Wabi warns about differences from the most up-to-date ABI,
> which is also used by default
> cc1plus: note: use e.g. -Wabi=11 to warn about changes from GCC 7
> long int std::abs(long int) long long int std::abs(long long int) constexpr
> double std::abs(double) constexpr float std::abs(float) constexpr long double
> std::abs(long double) ldiv_t std::div(long int, long int)
> std::exception::exception() std::exception::exception()
> std::exception::exception() std::bad_exception::bad_exception()
> std::bad_exception::bad_exception() std::bad_exception::bad_exception() const
> char* std::type_info::name() const bool std::type_info::operator!=(const
> std::type_info&) const std::size_t std::type_info::hash_code() const
> std::type_info::type_info(const char*) std::type_info::type_info(const char*)
> std::type_info::type_info(const char*) std::bad_cast::bad_cast()
> std::bad_cast::bad_cast() std::bad_cast::bad_cast()
> std::bad_typeid::bad_typeid() std::bad_typeid::bad_typeid()
> std::bad_typeid::bad_typeid()
> std::__exception_ptr::exception_ptr::exception_ptr(std::nullptr_t)
> std::__exception_ptr::exception_ptr::exception_ptr(std::nullptr_t)
> std::__exception_ptr::exception_ptr::exception_ptr(std::nullptr_t)
> std::__exception_ptr::exception_ptr::exception_ptr(std::__exception_ptr::exception_ptr&&)
>
> std::__exception_ptr::exception_ptr::exception_ptr(std::__exception_ptr::exception_ptr&&)
>
> std::__exception_ptr::exception_ptr::exception_ptr(std::__exception_ptr::exception_ptr&&)
> std::__exception_ptr::exception_ptr&
> std::__exception_ptr::exception_ptr::operator=(std::__exception_ptr::exception_ptr&&)
> std::__exception_ptr::exception_ptr::operator bool() const void
> std::__exception_ptr::swap(std::__exception_ptr::exception_ptr&,
> std::__exception_ptr::exception_ptr&) void
> std::__exception_ptr::__dest_thunk(void*) std::__exception_ptr::exception_ptr
> std::make_exception_ptr(_Ex) constexpr _Tp* std::__addressof(_Tp&) constexpr
> std::integral_constant<_Tp, __v>::operator std::integral_constant<_Tp,
> __v>::value_type() const constexpr std::integral_constant<_Tp,
> __v>::value_type std::integral_constant<_Tp, __v>::operator()() const
> std::integral_constant<bool, false> constexpr const bool
> std::integral_constant<bool, false>::value constexpr const bool
> std::integral_constant<bool, false>::value std::integral_constant<bool, true>
> constexpr const bool std::integral_constant<bool, true>::value constexpr
> const bool std::integral_constant<bool, true>::value
> std::integral_constant<short unsigned int, 0> constexpr const short unsigned
> int std::integral_constant<short unsigned int, 0>::value constexpr const
> short unsigned int std::integral_constant<short unsigned int, 0>::value
> std::__make_unsigned_selector_base::_List<unsigned char, short unsigned int,
> unsigned int, long unsigned int, long long unsigned int>
> std::__make_unsigned_selector_base::_List<short unsigned int, unsigned int,
> long unsigned int, long long unsigned int>
> std::__make_unsigned_selector_base::_List<unsigned int, long unsigned int,
> long long unsigned int> std::__make_unsigned_selector_base::_List<long
> unsigned int, long long unsigned int>
> std::__make_unsigned_selector_base::_List<long long unsigned int>
> std::__make_unsigned_selector_base::_List<> constexpr const size_t
> std::__make_unsigned_selector_base::_List<long long unsigned int>::__size
> constexpr const size_t std::__make_unsigned_selector_base::_List<long long
> unsigned int>::__size constexpr const size_t
> std::__make_unsigned_selector_base::_List<long unsigned int, long long
> unsigned int>::__size constexpr const size_t
> std::__make_unsigned_selector_base::_List<long unsigned int, long long
> unsigned int>::__size constexpr const size_t
> std::__make_unsigned_selector_base::_List<unsigned int, long unsigned int,
> long long unsigned int>::__size constexpr const size_t
> std::__make_unsigned_selector_base::_List<unsigned int, long unsigned int,
> long long unsigned int>::__size constexpr const size_t
> std::__make_unsigned_selector_base::_List<short unsigned int, unsigned int,
> long unsigned int, long long unsigned int>::__size constexpr const size_t
> std::__make_unsigned_selector_base::_List<short unsigned int, unsigned int,
> long unsigned int, long long unsigned int>::__size constexpr const size_t
> std::__make_unsigned_selector_base::_List<unsigned char, short unsigned int,
> unsigned int, long unsigned int, long long unsigned int>::__size constexpr
> const size_t std::__make_unsigned_selector_base::_List<unsigned char, short
> unsigned int, unsigned int, long unsigned int, long long unsigned
> int>::__size constexpr const size_t
> std::__make_unsigned_selector_base::_List<unsigned char, short unsigned int,
> unsigned int, long unsigned int, long long unsigned int>::__size
> std::__make_unsigned_selector<wchar_t, false, true>
> std::__make_unsigned_selector_base::__select<2,
> std::__make_unsigned_selector_base::_List<unsigned char, short unsigned int,
> unsigned int, long unsigned int, long long unsigned int>, false> constexpr
> const size_t std::__make_unsigned_selector_base::_List<short unsigned int,
> unsigned int, long unsigned int, long long unsigned int>::__size
> std::__make_unsigned_selector_base::__select<2,
> std::__make_unsigned_selector_base::_List<short unsigned int, unsigned int,
> long unsigned int, long long unsigned int>, true> std::is_const<wchar_t>
> constexpr const bool std::integral_constant<bool, false>::value
> std::is_volatile<wchar_t> std::__match_cv_qualifiers<wchar_t, short unsigned
> int, false, false> std::__cv_selector<short unsigned int, false, false>
> std::__make_unsigned_selector<char16_t, false, true> std::is_const<char16_t>
> std::is_volatile<char16_t> std::__match_cv_qualifiers<char16_t, short
> unsigned int, false, false> std::__make_unsigned_selector<char32_t, false,
> true> std::__make_unsigned_selector_base::__select<4,
> std::__make_unsigned_selector_base::_List<unsigned char, short unsigned int,
> unsigned int, long unsigned int, long long unsigned int>, false>
> std::__make_unsigned_selector_base::__select<4,
> std::__make_unsigned_selector_base::_List<short unsigned int, unsigned int,
> long unsigned int, long long unsigned int>, false> constexpr const size_t
> std::__make_unsigned_selector_base::_List<unsigned int, long unsigned int,
> long long unsigned int>::__size
> std::__make_unsigned_selector_base::__select<4,
> std::__make_unsigned_selector_base::_List<unsigned int, long unsigned int,
> long long unsigned int>, false> constexpr const size_t
> std::__make_unsigned_selector_base::_List<long unsigned int, long long
> unsigned int>::__size std::__make_unsigned_selector_base::__select<4,
> std::__make_unsigned_selector_base::_List<long unsigned int, long long
> unsigned int>, true> std::is_const<char32_t> std::is_volatile<char32_t>
> std::__match_cv_qualifiers<char32_t, long unsigned int, false, false>
> std::__cv_selector<long unsigned int, false, false>
> std::__make_signed_selector<wchar_t, false, true> std::is_integral<wchar_t>
> std::remove_cv<wchar_t> std::remove_volatile<wchar_t>
> std::remove_const<wchar_t> constexpr const bool std::integral_constant<bool,
> true>::value std::is_enum<wchar_t> std::__make_unsigned_selector<wchar_t,
> true, false> std::is_integral<short unsigned int> std::remove_cv<short
> unsigned int> std::remove_volatile<short unsigned int>
> std::remove_const<short unsigned int> std::is_enum<short unsigned int>
> std::__make_signed_selector<short unsigned int, true, false>
> std::is_const<short unsigned int> std::is_volatile<short unsigned int>
> std::__match_cv_qualifiers<short unsigned int, short int, false, false>
> std::__cv_selector<short int, false, false>
> std::__make_signed_selector<char16_t, false, true> std::is_integral<char16_t>
> std::remove_cv<char16_t> std::remove_volatile<char16_t>
> std::remove_const<char16_t> std::is_enum<char16_t>
> std::__make_unsigned_selector<char16_t, true, false>
> std::__make_signed_selector<char32_t, false, true> std::is_integral<char32_t>
> std::remove_cv<char32_t> std::remove_volatile<char32_t>
> std::remove_const<char32_t> std::is_enum<char32_t>
> std::__make_unsigned_selector<char32_t, true, false> std::is_integral<long
> unsigned int> std::remove_cv<long unsigned int> std::remove_volatile<long
> unsigned int> std::remove_const<long unsigned int> std::is_enum<long unsigned
> int> std::__make_signed_selector<long unsigned int, true, false>
> std::is_const<long unsigned int> std::is_volatile<long unsigned int>
> std::__match_cv_qualifiers<long unsigned int, long int, false, false>
> std::__cv_selector<long int, false, false> decltype (__declval<_Tp>(0))
> std::declval() constexpr bool std::__call_is_nt(std::__invoke_memfun_ref)
> constexpr bool std::__call_is_nt(std::__invoke_memfun_deref) constexpr bool
> std::__call_is_nt(std::__invoke_memobj_ref) constexpr bool
> std::__call_is_nt(std::__invoke_memobj_deref) constexpr bool
> std::__call_is_nt(std::__invoke_other) constexpr _Tp&& std::forward(typename
> std::remove_reference<_Tp>::type&) constexpr _Tp&& std::forward(typename
> std::remove_reference<_Tp>::type&&) constexpr typename
> std::remove_reference<_Tp>::type&& std::move(_Tp&&) constexpr typename
> std::conditional<std::__move_if_noexcept_cond<_Tp>::value, const _Tp&,
> _Tp&&>::type std::move_if_noexcept(_Tp&) constexpr _Tp* std::addressof(_Tp&)
> _Tp std::__exchange(_Tp&, _Up&&) typename
> std::enable_if<std::__and_<std::__not_<std::__is_tuple_like<_Tp> >,
> std::is_move_constructible<_Tp>, std::is_move_assignable<_Tp> >::value>::type
> std::swap(_Tp&, _Tp&) typename
> std::enable_if<std::__is_swappable<_Tp>::value>::type std::swap(_Tp (&)[_Nm],
> _Tp (&)[_Nm]) std::nested_exception::nested_exception()
> std::nested_exception::nested_exception()
> std::nested_exception::nested_exception() void
> std::nested_exception::rethrow_nested() const
> std::__exception_ptr::exception_ptr std::nested_exception::nested_ptr() const
> std::_Nested_exception<_Except>::_Nested_exception(const _Except&)
> std::_Nested_exception<_Except>::_Nested_exception(_Except&&) void
> std::__throw_with_nested_impl(_Tp&&, std::true_type) void
> std::__throw_with_nested_impl(_Tp&&, std::false_type) void
> std::throw_with_nested(_Tp&&) std::__rethrow_if_nested_cond<_Ex>
> std::__rethrow_if_nested_impl(const _Ex*) void
> std::__rethrow_if_nested_impl(const void*) void std::rethrow_if_nested(const
> _Ex&) std::bad_alloc::bad_alloc() std::bad_alloc::bad_alloc()
> std::bad_alloc::bad_alloc() std::bad_array_new_length::bad_array_new_length()
> std::bad_array_new_length::bad_array_new_length()
> std::bad_array_new_length::bad_array_new_length() void* operator
> new(std::size_t, void*) void* operator new [](std::size_t, void*) void
> operator delete(void*, void*) void operator delete [](void*, void*) constexpr
> _Tp* std::launder(_Tp*) void* operator new(std::size_t,
> std::align_val_t)cc1plus was compiled with optimization - stepping may behave
> oddly; variables may not be available.
> Process 10880 stopped
> * thread #1, queue = 'com.apple.main-thread', stop reason = breakpoint 1.1
> frame #0: 0x0000000100c21378 cc1plus`internal_error(gmsgid="in %s, at
> %s:%d") at diagnostic.c:1441 [opt]
> 1438 internal_error (const char *gmsgid, ...)
> 1439 {
> 1440 va_list ap;
> -> 1441 va_start (ap, gmsgid);
> 1442 rich_location richloc (line_table, input_location);
> 1443 diagnostic_impl (&richloc, -1, gmsgid, &ap, DK_ICE);
> 1444 va_end (ap);
> Target 0: (cc1plus) stopped.
> (lldb) frame sel 2
> frame #2: 0x0000000100074b36
> cc1plus`import_export_decl(decl=0x000000014269c750) at decl2.c:2877 [opt]
> 2874 gcc_assert (VAR_OR_FUNCTION_DECL_P (decl));
> 2875 /* Any code that creates entities with TREE_PUBLIC cleared should
> 2876 also set DECL_INTERFACE_KNOWN. */
> -> 2877 gcc_assert (TREE_PUBLIC (decl));
> 2878 if (TREE_CODE (decl) == FUNCTION_DECL)
> 2879 gcc_assert (DECL_IMPLICIT_INSTANTIATION (decl)
> 2880 || DECL_FRIEND_PSEUDO_TEMPLATE_INSTANTIATION (decl)
> (lldb) call debug_tree(decl)
> <var_decl 0x14269c750 value
> type <boolean_type 0x1426aa5e8 bool readonly unsigned type_6 QI
> size <integer_cst 0x142502768 constant 8>
> unit-size <integer_cst 0x142502780 constant 1>
> align:8 warn_if_not_align:0 symtab:150 alias-set -1 canonical-type
> 0x1426aa5e8 precision:1 min <integer_cst 0x1425029d8 0> max <integer_cst
> 0x142502a08 1>>
> readonly constant used static tree_1 tree_2 tree_3 unsigned nonlocal
> in_system_header read decl_1 QI
> /Users/pkoning/Documents/svn/buildpdp/pdp11-aout/libstdc++-v3/include/type_traits:59:28
> size <integer_cst 0x142502768 8> unit-size <integer_cst 0x142502780 1>
> align:8 warn_if_not_align:0 context <record_type 0x1426a7e70
> integral_constant> initial <integer_cst 0x1425029d8 0>
> template-info 0x1426a64e0 chain <function_decl 0x1426a0600 __conv_op >>
> (lldb)
lldb? eh ... ;)
anyhow, this is
namespace std
{
# 56
"/Users/pkoning/Documents/svn/buildpdp/pdp11-aout/libstdc++-v3/include/type_traits"
3
template<typename _Tp, _Tp __v>
struct integral_constant
{
static constexpr _Tp value = __v;
^^^
which should have TREE_PUBLIC set. My next step would be to watch how
this flag changes (if it does...)
break at ggc-page.c:1442 (the return stmt of ggc_internal_alloc)
conditional on result == 0x14269c750
and then watch *&the-decl->base.public_flag printing said flag when
the watchpoint hits
(because you're watching the whole integer containing the bitfield bit).
If that doesn't go anywhere try reducing the source file using creduce
or by other means.
Maybe look at reset_decl_linkage () and visibility support in general.
Richard.
> Build/configure info:
>
> pkoning:gcc pkoning$ ./xg++ --verbose
> Using built-in specs.
> COLLECT_GCC=./xg++
> Target: pdp11-aout
> Configured with: ../gcc/configure --target=pdp11-aout
> --prefix=/usr/local/pdp11-aout --without-x target_alias=pdp11-aout
> --with-mpc=/usr/local --with-mpfr=/usr/local --with-gmp=/usr/local
> --disable-libssp --disable-shared --with-newlib
> --enable-languages=c,c++,fortran --enable-checking=rtl
> Thread model: single
> gcc version 9.0.0 20180716 (experimental) (GCC)
>
> The new_opa.ii file is attached.
>
> paul
>
