[Bug c++/44059] New: Static initializers executed more than once when using unique global symbols

[ivan dot stankovic at avl dot com]

With g++ 4.5.0 static initializers can be executed more than once.
Here's how. Let a.cc contain the following code:

#include <stdio.h>

struct A {
  A() {
    static int x = printf("x initialized at @%p\n", &x);
  }
};

extern "C" void inita();

void inita()
{
  A x;
  A y;
}

And let b.cc be the copy of a.cc where 'inita' has been renamed
to 'initb'. Then make a shared library a.so from a.cc and b.so from
b.cc. Finally, make a program that dynamically loads a.so and b.so
and calls inita and initb functions.

Since 'x' ends up as a unique global symbol, there will be only one
object in the process, but the initialization code will be run twice
(the address printed will be the same).


-- 
           Summary: Static initializers executed more than once when using
                    unique global symbols
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Severity: major
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: ivan dot stankovic at avl dot com
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44059