On Wed, Mar 13, 2013 at 03:32:24PM -0400, Jason Merrill wrote: > We can't pass the address of __dso_handle to __cxa_thread_atexit if > the target doesn't provide that symbol in the crt files. Fixed by > passing NULL if the target doesn't use __cxa_atexit. > > Tested x86_64-pc-linux-gnu and hppa2.0w-hp-hpux11.11. This fixes > broken new functionality on a secondary target; is it OK for 4.8.0 > or should it wait for 4.8.1?
This is ok for 4.8.0. > commit 145dab2e1e46ac025414e1a225e29caa2c3b41c1 > Author: Jason Merrill <[email protected]> > Date: Mon Mar 11 12:31:16 2013 -0400 > > PR c++/56346 > * decl.c (register_dtor_fn): Pass null to __cxa_thread_atexit > dso_handle parm on targets without __cxa_atexit. > > diff --git a/gcc/cp/decl.c b/gcc/cp/decl.c > index 150e866..92114ff 100644 > --- a/gcc/cp/decl.c > +++ b/gcc/cp/decl.c > @@ -6758,10 +6758,9 @@ register_dtor_fn (tree decl) > "__aeabi_atexit"), and DECL is a class object, we can just pass the > destructor to "__cxa_atexit"; we don't have to build a temporary > function to do the cleanup. */ > - ob_parm = (DECL_THREAD_LOCAL_P (decl) > - || (flag_use_cxa_atexit > - && !targetm.cxx.use_atexit_for_cxa_atexit ())); > - dso_parm = ob_parm; > + dso_parm = (flag_use_cxa_atexit > + && !targetm.cxx.use_atexit_for_cxa_atexit ()); > + ob_parm = (DECL_THREAD_LOCAL_P (decl) || dso_parm); > use_dtor = ob_parm && CLASS_TYPE_P (type); > if (use_dtor) > { > @@ -6825,7 +6824,7 @@ register_dtor_fn (tree decl) > before passing it in, to avoid spurious errors. */ > addr = build_nop (ptr_type_node, addr); > } > - else if (ob_parm) > + else > /* Since the cleanup functions we build ignore the address > they're given, there's no reason to pass the actual address > in, and, in general, it's cheaper to pass NULL than any > @@ -6835,6 +6834,10 @@ register_dtor_fn (tree decl) > if (dso_parm) > arg2 = cp_build_addr_expr (get_dso_handle_node (), > tf_warning_or_error); > + else if (ob_parm) > + /* Just pass NULL to the dso handle parm if we don't actually > + have a DSO handle on this target. */ > + arg2 = null_pointer_node; > else > arg2 = NULL_TREE; > Jakub
