[Bug go/98504] New: [11 Regression] bootstrap broken in libgo on ia64-linux-gnu

[Bug go/98504] New: [11 Regression] bootstrap broken in libgo on ia64-linux-gnu

[doko at debian dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98504

            Bug ID: 98504
           Summary: [11 Regression] bootstrap broken in libgo on
                    ia64-linux-gnu
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: go
          Assignee: ian at airs dot com
          Reporter: doko at debian dot org
                CC: cmang at google dot com
  Target Milestone: ---

seen with trunk 20210102 on ia64-linux-gnu:

go1: internal compiler error: Segmentation fault
0x400000000126cfcf crash_signal
        ../../src/gcc/toplev.c:327
0x4000000002de14df std::__cxx11::basic_string<char, std::char_traits<char>,
std::allocator<char> >::substr(unsigned long, unsigned long) const
       
/<<PKGBUILDDIR>>/build/ia64-linux-gnu/libstdc++-v3/include/bits/basic_string.h:907
0x400000000036e3ff Gogo::special_name_pos(std::__cxx11::basic_string<char,
std::char_traits<char>, std::allocator<char> > const&)
        ../../src/gcc/go/gofrontend/names.cc:1193
0x400000000023783f should_export
        ../../src/gcc/go/gofrontend/export.cc:464
0x400000000023c99f Export::export_globals(std::__cxx11::basic_string<char,
std::char_traits<char>, std::allocator<char> > const&,
std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >
const&, std::__cxx11::basic_string<char, std::char_traits<char>,
std::allocator<char> > const&, std::map<std::__cxx11::basic_string<char,
std::char_traits<char>, std::allocator<char> >, Package*,
std::less<std::__cxx11::basic_string<char, std::char_traits<char>,
std::allocator<char> > >,
std::allocator<std::pair<std::__cxx11::basic_string<char,
std::char_traits<char>, std::allocator<char> > const, Package*> > > const&,
std::map<std::__cxx11::basic_string<char, std::char_traits<char>,
std::allocator<char> >, Package*, std::less<std::__cxx11::basic_string<char,
std::char_traits<char>, std::allocator<char> > >,
std::allocator<std::pair<std::__cxx11::basic_string<char,
std::char_traits<char>, std::allocator<char> > const, Package*> > > const&,
std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >
const&, Import_init_set const&, Bindings const*,
std::unordered_set<Named_object*, std::hash<Named_object*>,
std::equal_to<Named_object*>, std::allocator<Named_object*> >*)
        ../../src/gcc/go/gofrontend/export.cc:573
0x40000000003ae35f Gogo::do_exports()
       
/<<PKGBUILDDIR>>/build/prev-ia64-linux-gnu/libstdc++-v3/include/bits/basic_string.h:907
0x400000000035dbef Gogo::do_exports()
        ../../src/gcc/go/gofrontend/gogo.cc:5201
0x400000000035dbef go_parse_input_files(char const**, unsigned int, bool, bool)
        ../../src/gcc/go/gofrontend/go.cc:157
0x40000000002f4aff go_langhook_parse_file
        ../../src/gcc/go/go-lang.c:352
Please submit a full bug report,
with preprocessed source if appropriate.

configured with:
         --enable-languages=c,c++,go,d,fortran,objc,obj-c++
         --prefix=/usr/lib/gcc-snapshot
         --with-gcc-major-version-only
         --program-prefix=
         --enable-shared
         --enable-linker-build-id
         --disable-nls
         --enable-clocale=gnu
         --enable-libstdcxx-debug
         --enable-libstdcxx-time=yes
         --with-default-libstdcxx-abi=new
         --enable-gnu-unique-object
         --disable-libssp
         --disable-libitm
         --disable-libsanitizer
         --enable-plugin
         --with-system-zlib
         --disable-libphobos
         --enable-objc-gc=auto
         --enable-multiarch
         --disable-werror
         --with-system-libunwind
         --enable-checking=yes
         --build=ia64-linux-gnu
         --host=ia64-linux-gnu
         --target=ia64-linux-gnu
         --with-build-config=bootstrap-lto-lean
         --enable-link-serialization=1

[Bug go/98504] [11 Regression] bootstrap broken in libgo on ia64-linux-gnu

[doko at debian dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98504

--- Comment #1 from Matthias Klose <doko at debian dot org> ---
make[6]: *** [Makefile:2962: runtime.lo] Error 1
make[6]: Leaving directory '/<<PKGBUILDDIR>>/build/ia64-linux-gnu/libgo'
make[5]: *** [Makefile:2292: all-recursive] Error 1
make[5]: Leaving directory '/<<PKGBUILDDIR>>/build/ia64-linux-gnu/libgo'
make[4]: *** [Makefile:1187: all] Error 2
make[4]: Leaving directory '/<<PKGBUILDDIR>>/build/ia64-linux-gnu/libgo'
make[3]: *** [Makefile:21385: all-target-libgo] Error 2

[Bug go/98504] [11 Regression] bootstrap broken in libgo on ia64-linux-gnu

[schwab@linux-m68k.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98504

--- Comment #2 from Andreas Schwab <schwab@linux-m68k.org> ---
Does it also fail without LTO?

[Bug go/98504] [11 Regression] bootstrap broken in libgo on ia64-linux-gnu

[ian at airs dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98504

--- Comment #3 from Ian Lance Taylor <ian at airs dot com> ---
Maybe I'm missing something obvious, but I don't see how this is possible.  The
code in the Go frontend is

  if (suffix.compare(2, 5, "thunk") == 0
      && Gogo::is_digits(suffix.substr(7)))
    return pos;

The crash is apparently occurring on the call to suffix.substr(7).  Given that
suffix.compare already worked, there should be no way that that code could
crash.

So to me this looks like a miscompilation of the Go frontend code, rather than
a bug in the Go frontend.

[Bug go/98504] [11 Regression] bootstrap broken in libgo on ia64-linux-gnu

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98504

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |11.0

[Bug lto/98504] [11 Regression] bootstrap broken in libgo on ia64-linux-gnu

[doko at debian dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98504

--- Comment #4 from Matthias Klose <doko at debian dot org> ---
a trunk 20210130 build without LTO did succeed.

[Bug lto/98504] [11 Regression] bootstrap broken in libgo on ia64-linux-gnu

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98504

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2021-04-09
             Status|UNCONFIRMED                 |WAITING
     Ever confirmed|0                           |1

--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Matthias, what's the state on current trunk?

[Bug lto/98504] [11 Regression] bootstrap broken in libgo on ia64-linux-gnu

[glaubitz at physik dot fu-berlin.de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98504

John Paul Adrian Glaubitz <glaubitz at physik dot fu-berlin.de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |glaubitz at physik dot fu-berlin.d
                   |                            |e

--- Comment #6 from John Paul Adrian Glaubitz <glaubitz at physik dot fu-berlin.de> ---
(In reply to Richard Biener from comment #5)
> Matthias, what's the state on current trunk?

I can test this for Matthias on my own machine as the new ia64 porterbox that
we set up in Debian is currently having connection issues with the LDAP
database.

I will try to get the machine fixed over the weekend.

[Bug lto/98504] [11/12 Regression] bootstrap broken in libgo on ia64-linux-gnu

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98504

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|11.0                        |11.2

--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 11.1 has been released, retargeting bugs to GCC 11.2.

[Bug lto/98504] [11/12 Regression] bootstrap broken in libgo on ia64-linux-gnu

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98504

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|11.2                        |11.3

--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
GCC 11.2 is being released, retargeting bugs to GCC 11.3

[Bug lto/98504] [11/12 Regression] bootstrap broken in libgo on ia64-linux-gnu

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98504

--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
Any update on the status on current trunk?

[Bug lto/98504] [11/12 Regression] bootstrap broken in libgo on ia64-linux-gnu

[glaubitz at physik dot fu-berlin.de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98504

--- Comment #10 from John Paul Adrian Glaubitz <glaubitz at physik dot fu-berlin.de> ---
(In reply to Richard Biener from comment #9)
> Any update on the status on current trunk?

I can give it a try later this week. We have a new shiny ia64 porterbox in
Debian now :-).

[Bug lto/98504] [11/12 Regression] bootstrap broken in libgo on ia64-linux-gnu

[glaubitz at physik dot fu-berlin.de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98504

--- Comment #11 from John Paul Adrian Glaubitz <glaubitz at physik dot fu-berlin.de> ---
(In reply to John Paul Adrian Glaubitz from comment #10)
> (In reply to Richard Biener from comment #9)
> > Any update on the status on current trunk?
> 
> I can give it a try later this week. We have a new shiny ia64 porterbox in
> Debian now :-).

So, I just did a bootstrap build with

$ ../configure --prefix=$HOME/gcc-install --enable-multilib
--enable-languages=c,c++,go --with-system-libunwind

and it built fine without any issues.

Trying to build a simple Go program failed however due to an unrelated error:

(sid_ia64-dchroot)glaubitz@yttrium:~/gcc-install/bin$ ./gccgo ~/hello.go 
/home/glaubitz/hello.go:5:11: error: import file 'fmt' not found
    5 | import "fmt"
      |           ^
/home/glaubitz/hello.go:10:5: error: reference to undefined name 'fmt'
   10 |     fmt.Println("hello world")
      |     ^
(sid_ia64-dchroot)glaubitz@yttrium:~/gcc-install/bin$

I'm not a GO expert, so no idea how to tell the Go compiler where the libraries
are located.

[Bug lto/98504] [11/12 Regression] bootstrap broken in libgo on ia64-linux-gnu

[ian at airs dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98504

--- Comment #12 from Ian Lance Taylor <ian at airs dot com> ---
You can pass the -I option to tell the compiler where to find the fmt.gox file.

But, of course, you shouldn't have to.  A "make install" should put fmt.gox in
the right place by default.  I don't know why you are seeing a problem there.

[Bug lto/98504] [11/12 Regression] bootstrap broken in libgo on ia64-linux-gnu

[glaubitz at physik dot fu-berlin.de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98504

--- Comment #13 from John Paul Adrian Glaubitz <glaubitz at physik dot fu-berlin.de> ---
(In reply to Ian Lance Taylor from comment #12)
> But, of course, you shouldn't have to.  A "make install" should put fmt.gox
> in the right place by default.  I don't know why you are seeing a problem
> there.

I gave it a try again. Compiling works, but the program crashes:

glaubitz@yttrium:~$ gccgo hello.go -o hello
glaubitz@yttrium:~$ ./hello 
Aborted
glaubitz@yttrium:~$

[Bug lto/98504] [11/12 Regression] bootstrap broken in libgo on ia64-linux-gnu

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98504

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P3                          |P4

--- Comment #14 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to John Paul Adrian Glaubitz from comment #11)
> (In reply to John Paul Adrian Glaubitz from comment #10)
> > (In reply to Richard Biener from comment #9)
> > > Any update on the status on current trunk?
> > 
> > I can give it a try later this week. We have a new shiny ia64 porterbox in
> > Debian now :-).
> 
> So, I just did a bootstrap build with
> 
> $ ../configure --prefix=$HOME/gcc-install --enable-multilib
> --enable-languages=c,c++,go --with-system-libunwind
> 
> and it built fine without any issues.

Btw, that was never broken - broken was a build with
--with-build-config=bootstrap-lto-lean

I'd still be interested if that now works.

P4 as default config bootstrap never was broken and ia64-linux isn't primary or
secondary.

[Bug lto/98504] [11/12 Regression] bootstrap broken in libgo on ia64-linux-gnu

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98504

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|11.3                        |11.4

--- Comment #15 from Richard Biener <rguenth at gcc dot gnu.org> ---
GCC 11.3 is being released, retargeting bugs to GCC 11.4.

[Bug lto/98504] [11/12/13/14 Regression] bootstrap broken in libgo on ia64-linux-gnu

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98504

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|11.4                        |11.5

--- Comment #16 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 11.4 is being released, retargeting bugs to GCC 11.5.