[Bug libitm/52787] New: Segmentation fault on MinGW

[Bug libitm/52787] New: Segmentation fault on MinGW

[i.nixman at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52787

             Bug #: 52787
           Summary: Segmentation fault on MinGW
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libitm
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: i.nixman@gmail.com


This code successfully compiled but on run crashes:

// { dg-do run }

extern "C" void abort ();

int dothrow;
int g;

static void f1()
{
  g++;
  if (dothrow)
    throw 1;
}

static void f2()
{
  __transaction_atomic {
    f1();
  }
}

int main()
{
  dothrow = 0;
  f2();

  dothrow = 1;
  try {
    f2();
  } catch (...) {
  }

  if (g != 2)
    abort ();
  return 0;
}

-------------------------------------------------------------------------

Coompiler:
$ g++ -v

Using built-in specs.
COLLECT_GCC=e:\mingw32\bin\g++.exe
COLLECT_LTO_WRAPPER=e:/mingw32/bin/../libexec/gcc/i686-w64-mingw32/4.7.0/lto-wrapper.exe
Target: i686-w64-mingw32
Configured with: ../../mingw-src/gcc-4.7.0/configure --host=i686-w64-mingw32
--build=i686-w64-mingw32 --target=i686-w64-mingw32 --enable-targets=all
--enable-multilib --prefix=/./mingw-x32 --with-sysroot=/./mingw-x32
--with-tune=generic --enable-languages=c,c++,lto,fortran
--enable-libstdcxx-time=yes --with-host-libstdcxx='-static -lstdc++'
--enable-shared --enable-static --enable-threads=posix --enable-libgomp
--enable-lto --enable-graphite --enable-cloog-backend=isl
--enable-checking=release --enable-fully-dynamic-string
--enable-version-specific-runtime-libs --enable-sjlj-exceptions
--disable-libstdcxx-pch --disable-libstdcxx-debug --disable-debug
--disable-bootstrap --disable-rpath --disable-win32-registry --disable-nls
--disable-werror --disable-symvers --with-libiconv --with-gmp=/./mingw-libs-x32
--with-mpfr=/./mingw-libs-x32 --with-mpc=/./mingw-libs-x32
--with-ppl=/./mingw-libs-x32 --with-cloog=/./mingw-libs-x32 CFLAGS='-O3 -pipe
-fomit-frame-pointer -momit-leaf-frame-pointer -I/./mingw-libs-x32/include'
CXXFLAGS='-O3 -pipe -fomit-frame-pointer -momit-leaf-frame-pointer' CPPFLAGS=
LDFLAGS='-pipe -s -L/./mingw-libs-x32/lib'
Thread model: posix
gcc version 4.7.0

-------------------------------------------------------------------------

Output log from gdb:

Program received signal SIGSEGV, Segmentation fault.
(anonymous namespace)::serialirr_dispatch::ITM_RU4 (this=0x81c0d8, ptr=0x1)
    at E:/msys/mingw-src/gcc-4.7.0/libitm/method-serial.cc:90
90      CREATE_DISPATCH_METHODS(virtual, )


-------------------------------------------------------------------------

[Bug libitm/52787] Segmentation fault on MinGW

[ian at airs dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52787

Ian Lance Taylor <ian at airs dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |ian at airs dot com

--- Comment #1 from Ian Lance Taylor <ian at airs dot com> 2012-03-30 14:38:57 UTC ---
Based to your e-mail on gcc-help, you left out a very important piece of
information.  This is using a build with the following patch:

> Moreover, if I replace line 134 in file gccroot/libitm/configure.tgt [1] from:
> >   | *-*-darwin* | *-*-aix*)
> to:
> >   | *-*-darwin* | *-*-aix* | *-w64-mingw32)

As far as I know libitm is not expected to work on MinGW.

[Bug libitm/52787] Segmentation fault on MinGW

[i.nixman at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52787

--- Comment #2 from niXman <i.nixman at gmail dot com> 2012-03-30 19:55:51 UTC ---
>Based to your e-mail on gcc-help, you left out a very important piece of
information.
Yes, Ian. I had to mention it.
And yes, I'm not saying that libitm is supported by MinGW. And yes, as libitm
is not supported by MinGW - it's not a bug. I hurried with the creation of the
bug report.

I'd really like to make libitm work with MinGW. I would like to understand why
SIGSEGV occurs...

Thanks.

[Bug libitm/52787] Segmentation fault on MinGW

[ktietz at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52787

Kai Tietz <ktietz at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
                 CC|                            |ktietz at gcc dot gnu.org
         Resolution|                            |INVALID

--- Comment #3 from Kai Tietz <ktietz at gcc dot gnu.org> 2012-03-30 20:15:13 UTC ---
(In reply to comment #2)
> >Based to your e-mail on gcc-help, you left out a very important piece of
> information.
> Yes, Ian. I had to mention it.
> And yes, I'm not saying that libitm is supported by MinGW. And yes, as libitm
> is not supported by MinGW - it's not a bug. I hurried with the creation of the
> bug report.
> 
> I'd really like to make libitm work with MinGW. I would like to understand why
> SIGSEGV occurs...
> 
> Thanks.

Well, the configure patch required for this bug-report misses an important part
AFAICS.  You have to make sure that pthread-API is present, as libitm depends
on pthread.
This report is btw invalid, as this feature isn't supported for mingw targets
right now. So I close it.  Please keep discussion about adding support for
libitm on gcc's patches ML.