Core dump on 32-bit Cygwin if program calls dlopen

[Corinna Vinschen]

On Jul 14 19:42, Ken Brown wrote:
> I'm getting a core dump on exit from a program that does nothing but call
> dlopen.  (But the call to dlopen succeeds.)  This happens only in the 32-bit
> case.  Here's a simple test case.
> 
> $ cat test_dlopen.c
> #include <stdio.h>
> #include <dlfcn.h>
> int
> main()
> {
>   const char *dllname = "cyggs-9.dll";
>   void *handle;
>   printf ("Trying to dlopen %s...", dllname);
>   handle = dlopen (dllname, RTLD_LAZY);
>   if (handle)
>     {
>       printf ("succeeded.\n");
>       return 0;
>     }
>   else
>     {
>       printf ("failed.\n");
>       return 1;
>     }
> }
> 
> $ gcc test_dlopen.c
> 
> $ ./a
> Trying to dlopen cyggs-9.dll...succeeded.
> Aborted (core dumped)

The crash occurs when calling the destructors from do_global_dtors.
The crash address points to a crash inside a destructor of libgcc
(actually cyggcc_1-1.dll) which has been pulled in by cyggs-9.dll.

What destructor in libgcc would that be?  And what is it expecting
which is apparently missing?


Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Maintainer                 cygwin AT cygwin DOT com
Red Hat
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