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Re: [Mingw-users] Pending new mingwrt and w32api releases




> From: Chris Johns <chrisj@xxxxxxxxx>
> Date: Tue, 7 Mar 2017 12:20:13 +1100
> 
> >  998  const fde *
> >  999  _Unwind_Find_FDE (void *pc, struct dwarf_eh_bases *bases)
> > 1000  {
> > 1001    struct object *ob;
> > 1002    const fde *f = NULL;
> > 1003
> > 1004    init_object_mutex_once ();
> > 1005    __gthread_mutex_lock (&object_mutex);
> > 1006
> > 1007    /* Linear search through the classified objects, to find the one
> > 1008    containing the pc.  Note that pc_begin is sorted descending, and
> > 1009    we expect objects to be non-overlapping.  */
> 
> This is the runtime support in GCC to manage exceptions and this looks 
> like the DWARF, ie ELF support.

MinGW GCC produces DWARF debug info inside a COFF-PE executable, so
DWARF is used with MinGW even though ELF isn't.

> I did not know Windows executables used dwarf based information for 
> exceptions?

DWARF is used by MinGW since long ago.

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