[c++-concepts] Trouble bootstrapping concepts branch...

Andrew Sutton andrew.n.sutton@gmail.com
Thu Aug 22 23:09:00 GMT 2013


Sorry for the duplicate send. GMail is misbehaving and caused the
message to bounce from the gcc-help list. I thought I'd resend it.


I did see this. In fact, I have --disable-libsanitizer in my
configuration. So I haven't seen it in a while :/

I figured there was a core c++ change that wasn't compatible with that
library and it would be fixed in time. I actually spent a little time
debugging it and concluded that must have been outside my set of
changes. I think this bug report helped me confirm that:

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45253

It's possible that I'm reusing a field (say DECL_SIZE_UNIT) that is
used with bitfield decls in templates, but I couldn't find any
evidence supporting that.

I'm not sure what a good resolution would be here.

Andrew

On Thu, Aug 22, 2013 at 6:11 PM, Andrew Sutton
<andrew.n.sutton@gmail.com> wrote:
> I did see this. In fact, I have --disable-libsanitizer in my configuration.
> So I haven't seen it in a while :/
>
> I figured there was a core c++ change that wasn't compatible with that
> library and it would be fixed in time. I actually spent a little time
> debugging it and concluded that must have been outside my set of changes. I
> think this bug report helped me confirm that:
>
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45253
>
> It's possible that I'm reusing a field (say DECL_SIZE_UNIT) that is used
> with bitfield decls in templates, but I couldn't find any evidence
> supporting that.
>
> I'm not sure what a good resolution would be here.
>
> Andrew
>
>
> On Thu, Aug 22, 2013 at 5:50 PM, Gabriel Dos Reis
> <gdr@integrable-solutions.net> wrote:
>>
>> Andrew -- are you seeing this too?
>>
>> -- Gaby
>>
>> On Thu, Aug 22, 2013 at 10:45 AM, Ed Smith-Rowland <3dw4rd@verizon.net>
>> wrote:
>> > I checked out a brand new copy of the c++-concepts branch and tried to
>> > build.
>> > The build breaks in stage1 while trying to build libasan:
>> >
>> > -----------------------------------------------------------------------------------------------------------
>> > make[4]: Leaving directory
>> >
>> > `/home/ed/obj_concepts/x86_64-unknown-linux-gnu/libsanitizer/sanitizer_common'
>> > Making all in asan
>> > make[4]: Entering directory
>> > `/home/ed/obj_concepts/x86_64-unknown-linux-gnu/libsanitizer/asan'
>> > /bin/bash ../libtool --tag=CXX --mode=compile
>> > /home/ed/obj_concepts/./gcc/xgcc -shared-libgcc
>> > -B/home/ed/obj_concepts/./gcc -nostdinc++
>> > -L/home/ed/obj_concepts/x86_64-unknown-linux-gnu/libstdc++-v3/src
>> > -L/home/ed/obj_concepts/x86_64-unknown-linux-gnu/libstdc++-v3/src/.libs
>> > -B/home/ed/bin_concepts/x86_64-unknown-linux-gnu/bin/
>> > -B/home/ed/bin_concepts/x86_64-unknown-linux-gnu/lib/ -isystem
>> > /home/ed/bin_concepts/x86_64-unknown-linux-gnu/include -isystem
>> > /home/ed/bin_concepts/x86_64-unknown-linux-gnu/sys-include -D_GNU_SOURCE
>> > -D_DEBUG -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS
>> > -D__STDC_LIMIT_MACROS -DASAN_HAS_EXCEPTIONS=1
>> > -DASAN_FLEXIBLE_MAPPING_AND_OFFSET=0 -DASAN_NEEDS_SEGV=1 -I.
>> > -I../../../../gcc_concepts/libsanitizer/asan -I
>> > ../../../../gcc_concepts/libsanitizer/include -I
>> > ../../../../gcc_concepts/libsanitizer -Wall -W -Wno-unused-parameter
>> > -Wwrite-strings -pedantic -Wno-long-long -fPIC -fno-builtin
>> > -fno-exceptions
>> > -fomit-frame-pointer -funwind-tables -fvisibility=hidden
>> > -Wno-variadic-macros -I../../libstdc++-v3/include
>> > -I../../libstdc++-v3/include/x86_64-unknown-linux-gnu
>> > -I../../../../gcc_concepts/libsanitizer/../libstdc++-v3/libsupc++ -g -O2
>> > -D_GNU_SOURCE -MT asan_allocator2.lo -MD -MP -MF
>> > .deps/asan_allocator2.Tpo
>> > -c -o asan_allocator2.lo
>> > ../../../../gcc_concepts/libsanitizer/asan/asan_allocator2.cc
>> > libtool: compile: /home/ed/obj_concepts/./gcc/xgcc -shared-libgcc
>> > -B/home/ed/obj_concepts/./gcc -nostdinc++
>> > -L/home/ed/obj_concepts/x86_64-unknown-linux-gnu/libstdc++-v3/src
>> > -L/home/ed/obj_concepts/x86_64-unknown-linux-gnu/libstdc++-v3/src/.libs
>> > -B/home/ed/bin_concepts/x86_64-unknown-linux-gnu/bin/
>> > -B/home/ed/bin_concepts/x86_64-unknown-linux-gnu/lib/ -isystem
>> > /home/ed/bin_concepts/x86_64-unknown-linux-gnu/include -isystem
>> > /home/ed/bin_concepts/x86_64-unknown-linux-gnu/sys-include -D_GNU_SOURCE
>> > -D_DEBUG -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS
>> > -D__STDC_LIMIT_MACROS -DASAN_HAS_EXCEPTIONS=1
>> > -DASAN_FLEXIBLE_MAPPING_AND_OFFSET=0 -DASAN_NEEDS_SEGV=1 -I.
>> > -I../../../../gcc_concepts/libsanitizer/asan -I
>> > ../../../../gcc_concepts/libsanitizer/include -I
>> > ../../../../gcc_concepts/libsanitizer -Wall -W -Wno-unused-parameter
>> > -Wwrite-strings -pedantic -Wno-long-long -fPIC -fno-builtin
>> > -fno-exceptions
>> > -fomit-frame-pointer -funwind-tables -fvisibility=hidden
>> > -Wno-variadic-macros -I../../libstdc++-v3/include
>> > -I../../libstdc++-v3/include/x86_64-unknown-linux-gnu
>> > -I../../../../gcc_concepts/libsanitizer/../libstdc++-v3/libsupc++ -g -O2
>> > -D_GNU_SOURCE -MT asan_allocator2.lo -MD -MP -MF
>> > .deps/asan_allocator2.Tpo
>> > -c ../../../../gcc_concepts/libsanitizer/asan/asan_allocator2.cc -fPIC
>> > -DPIC
>> > -o .libs/asan_allocator2.o
>> > In file included from
>> > ../../../../gcc_concepts/libsanitizer/asan/asan_flags.h:16:0,
>> > from ../../../../gcc_concepts/libsanitizer/asan/asan_internal.h:15,
>> > from ../../../../gcc_concepts/libsanitizer/asan/asan_allocator.h:16,
>> > from ../../../../gcc_concepts/libsanitizer/asan/asan_allocator2.cc:16:
>> > ../../../../gcc_concepts/libsanitizer/asan/asan_allocator2.cc: In member
>> > function ‘void __asan::QuarantineCallback::Recycle(__asan::AsanChunk*)’:
>> > ../../../../gcc_concepts/libsanitizer/asan/asan_allocator2.cc:262:17:
>> > error:
>> > cannot bind bitfield
>> >
>> > ‘m->__asan::AsanChunk::<anonymous>.__asan::ChunkBase::<anonymous>.__asan::ChunkHeader::alloc_tid’
>> > to ‘__sanitizer::u32& {aka unsigned int&}’
>> > CHECK_NE(m->alloc_tid, kInvalidTid);
>> > ^
>> >
>> > ../../../../gcc_concepts/libsanitizer/sanitizer_common/sanitizer_internal_defs.h:174:33:
>> > note: in definition of macro ‘CHECK_IMPL’
>> > __sanitizer::u64 v1 = (u64)(c1); \
>> > ^
>> > ../../../../gcc_concepts/libsanitizer/asan/asan_allocator2.cc:262:5:
>> > note:
>> > in expansion of macro ‘CHECK_NE’
>> > CHECK_NE(m->alloc_tid, kInvalidTid);
>> > ^
>> > ../../../../gcc_concepts/libsanitizer/asan/asan_allocator2.cc:263:17:
>> > error:
>> > cannot bind bitfield
>> >
>> > ‘m->__asan::AsanChunk::<anonymous>.__asan::ChunkBase::<anonymous>.__asan::ChunkHeader::free_tid’
>> > to ‘__sanitizer::u32& {aka unsigned int&}’
>> > CHECK_NE(m->free_tid, kInvalidTid);
>> > ^
>> >
>> > ../../../../gcc_concepts/libsanitizer/sanitizer_common/sanitizer_internal_defs.h:174:33:
>> > note: in definition of macro ‘CHECK_IMPL’
>> > __sanitizer::u64 v1 = (u64)(c1); \
>> > ^
>> > ../../../../gcc_concepts/libsanitizer/asan/asan_allocator2.cc:263:5:
>> > note:
>> > in expansion of macro ‘CHECK_NE’
>> > CHECK_NE(m->free_tid, kInvalidTid);
>> > ^
>> > ../../../../gcc_concepts/libsanitizer/asan/asan_allocator2.cc: In
>> > function
>> > ‘void* __asan::Allocate(__sanitizer::uptr, __sanitizer::uptr,
>> > __sanitizer::StackTrace*, __asan::AllocType)’:
>> > ../../../../gcc_concepts/libsanitizer/asan/asan_allocator2.cc:364:26:
>> > error:
>> > cannot bind bitfield
>> >
>> > ‘m->__asan::AsanChunk::<anonymous>.__asan::ChunkBase::<anonymous>.__asan::ChunkHeader::alloc_tid’
>> > to ‘__sanitizer::u32& {aka unsigned int&}’
>> > CHECK_EQ(alloc_tid, m->alloc_tid); // Does alloc_tid fit into the
>> > bitfield?
>> > ^
>> >
>> > ../../../../gcc_concepts/libsanitizer/sanitizer_common/sanitizer_internal_defs.h:175:33:
>> > note: in definition of macro ‘CHECK_IMPL’
>> > __sanitizer::u64 v2 = (u64)(c2); \
>> > ^
>> > ../../../../gcc_concepts/libsanitizer/asan/asan_allocator2.cc:364:3:
>> > note:
>> > in expansion of macro ‘CHECK_EQ’
>> > CHECK_EQ(alloc_tid, m->alloc_tid); // Does alloc_tid fit into the
>> > bitfield?
>> > ^
>> > ../../../../gcc_concepts/libsanitizer/asan/asan_allocator2.cc: In
>> > function
>> > ‘void __asan::Deallocate(void*, __sanitizer::StackTrace*,
>> > __asan::AllocType)’:
>> > ../../../../gcc_concepts/libsanitizer/asan/asan_allocator2.cc:436:15:
>> > error:
>> > cannot bind bitfield
>> >
>> > ‘m->__asan::AsanChunk::<anonymous>.__asan::ChunkBase::<anonymous>.__asan::ChunkHeader::alloc_tid’
>> > to ‘__sanitizer::u32& {aka unsigned int&}’
>> > CHECK_GE(m->alloc_tid, 0);
>> > ^
>> >
>> > ../../../../gcc_concepts/libsanitizer/sanitizer_common/sanitizer_internal_defs.h:174:33:
>> > note: in definition of macro ‘CHECK_IMPL’
>> > __sanitizer::u64 v1 = (u64)(c1); \
>> > ^
>> > ../../../../gcc_concepts/libsanitizer/asan/asan_allocator2.cc:436:3:
>> > note:
>> > in expansion of macro ‘CHECK_GE’
>> > CHECK_GE(m->alloc_tid, 0);
>> > ^
>> > ../../../../gcc_concepts/libsanitizer/asan/asan_allocator2.cc:438:17:
>> > error:
>> > cannot bind bitfield
>> >
>> > ‘m->__asan::AsanChunk::<anonymous>.__asan::ChunkBase::<anonymous>.__asan::ChunkHeader::free_tid’
>> > to ‘__sanitizer::u32& {aka unsigned int&}’
>> > CHECK_EQ(m->free_tid, kInvalidTid);
>> > ^
>> >
>> > ../../../../gcc_concepts/libsanitizer/sanitizer_common/sanitizer_internal_defs.h:174:33:
>> > note: in definition of macro ‘CHECK_IMPL’
>> > __sanitizer::u64 v1 = (u64)(c1); \
>> > ^
>> > ../../../../gcc_concepts/libsanitizer/asan/asan_allocator2.cc:438:5:
>> > note:
>> > in expansion of macro ‘CHECK_EQ’
>> > CHECK_EQ(m->free_tid, kInvalidTid);
>> > ^
>> > ../../../../gcc_concepts/libsanitizer/asan/asan_allocator2.cc: In
>> > function
>> > ‘__asan::AsanChunk* __asan::GetAsanChunkByAddr(__sanitizer::uptr)’:
>> > ../../../../gcc_concepts/libsanitizer/asan/asan_allocator2.cc:500:14:
>> > error:
>> > cannot bind bitfield
>> >
>> > ‘m->__asan::AsanChunk::<anonymous>.__asan::ChunkBase::<anonymous>.__asan::ChunkHeader::from_memalign’
>> > to ‘__sanitizer::u32& {aka unsigned int&}’
>> > CHECK(m->from_memalign);
>> > ^
>> >
>> > ../../../../gcc_concepts/libsanitizer/sanitizer_common/sanitizer_internal_defs.h:174:33:
>> > note: in definition of macro ‘CHECK_IMPL’
>> > __sanitizer::u64 v1 = (u64)(c1); \
>> > ^
>> > ../../../../gcc_concepts/libsanitizer/asan/asan_allocator2.cc:500:5:
>> > note:
>> > in expansion of macro ‘CHECK’
>> > CHECK(m->from_memalign);
>> > ^
>> > make[4]: *** [asan_allocator2.lo] Error 1
>> > make[4]: Leaving directory
>> > `/home/ed/obj_concepts/x86_64-unknown-linux-gnu/libsanitizer/asan'
>> > make[3]: *** [all-recursive] Error 1
>> > make[3]: Leaving directory
>> > `/home/ed/obj_concepts/x86_64-unknown-linux-gnu/libsanitizer'
>> > make[2]: *** [all-stage1-target-libsanitizer] Error 2
>> > make[2]: Leaving directory `/home/ed/obj_concepts'
>> > make[1]: *** [stage1-bubble] Error 2
>> > make[1]: Leaving directory `/home/ed/obj_concepts'
>> > make: *** [bootstrap] Error 2
>> >
>> > -----------------------------------------------------------------------------------------------------------
>> >
>> > Any ideas?
>> >
>> > I'm not having trouble building building trunk at all.
>> >
>> > Could this be *Bug 57644*
>> > <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57644> -[C++1y] Cannot bind
>> > bitfield to lvalue reference? The default compiler for concepts branch
>> > is
>> > c++1y.
>> >
>> > I'm on x86_64 linux. The system compiler is stock (for ubuntu 13.4
>> > Raring):
>> >
>> > ed@bad-horse:~/obj_concepts$ g++ -v
>> > Using built-in specs.
>> > COLLECT_GCC=g++
>> > COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/4.7/lto-wrapper
>> > Target: x86_64-linux-gnu
>> > Configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro
>> > 4.7.3-1ubuntu1' --with-bugurl=file:///usr/share/doc/gcc-4.7/README.Bugs
>> > --enable-languages=c,c++,go,fortran,objc,obj-c++ --prefix=/usr
>> > --program-suffix=-4.7 --enable-shared --enable-linker-build-id
>> > --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
>> > --with-gxx-include-dir=/usr/include/c++/4.7 --libdir=/usr/lib
>> > --enable-nls
>> > --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug
>> > --enable-libstdcxx-time=yes --enable-gnu-unique-object --enable-plugin
>> > --with-system-zlib --enable-objc-gc --with-cloog
>> > --enable-cloog-backend=ppl
>> > --disable-cloog-version-check --disable-ppl-version-check
>> > --enable-multiarch
>> > --disable-werror --with-arch-32=i686 --with-abi=m64
>> > --with-multilib-list=m32,m64,mx32 --with-tune=generic
>> > --enable-checking=release --build=x86_64-linux-gnu
>> > --host=x86_64-linux-gnu
>> > --target=x86_64-linux-gnu
>> > Thread model: posix
>> > gcc version 4.7.3 (Ubuntu/Linaro 4.7.3-1ubuntu1)
>> >
>
>
>
>
> --
> Andrew Sutton
> andrew.n.sutton@gmail.com



-- 
Andrew Sutton
andrew.n.sutton@gmail.com



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