2005-12-05 Geoffrey Keating <geoffk@apple.com>
* varasm.c (default_binds_local_p_1): Weakrefs don't bind locally.
A hidden weak object does bind locally. Strong linkonce data
counts like any other strong symbol for binding.
(weak_finish_1): Don't specially handle weakrefs, they no longer
arrive here.
(assemble_alias): Weakrefs can't be TREE_PUBLIC yet.
* c-common.c (handle_alias_attribute): Allow static aliases
of variables.
(handle_weakref_attribute): Don't call declare_weak on weakrefs.
* gthr-dce.h: Make weakrefs static.
* gthr-tpf.h: Likewise.
* gthr-solaris.h: Likewise.
* gthr-posix.h: Likewise.
* gthr-posix95.h: Likewise.
* config/darwin.c (darwin_encode_section_info): static weakref
variables are not necessarily defined in this translation unit.
* doc/extend.texi (Function Attributes): Mention that an alias
attribute creates a definition for the thing it's attached to.
Change the documentation for weakref to say that the thing
it's attached to must be static.
Index: gcc/testsuite/ChangeLog
2005-12-05 Geoffrey Keating <geoffk@apple.com>
* g++.old-deja/g++.abi/vtable2.C: Make weakrefs static.
* gcc.dg/attr-weakref-1.c: Modify to not try to test public weakrefs,
and to work on Darwin.
* gcc.dg/attr-weakref-1b.c: New file.
* gcc.dg/attr-weakref-2.c: New test.
* gcc.dg/darwin-weakref-1.c: New test.
From-SVN: r108074
gcc/ChangeLog:
PR other/4372
* gthr-dce.h, gthr-posix.h, gthr-posix95.h, gthr-solaris.h,
gthr-tpf.h: Define __gthrw. For all identifiers that might
be weak, introduce weakrefs or non-weak aliases with __gthrw,
and prefix all uses with __ghtrw.
libobjc/ChangeLog:
PR other/4372
* thr-objc.c (_XOPEN_SOURCE): Define.
From-SVN: r106704
PR c++/13684
* cp/decl.c (expand_static_init): Use thread-safety API.
(register_dtor_fn): Return the call, don't expand it.
* cp/tree.c (add_stmt_to_compound): New fn.
(stabilize_call): Use it.
* gimplify.c (gimplify_cleanup_point_expr): Handle CLEANUP_EH_ONLY.
(gimple_push_cleanup): Add eh_only parm.
(gimplify_target_expr): Pass it.
* c.opt (-fno-threadsafe-statics): New option.
* c-opts.c (c_common_handle_option): Handle it.
* c-common.h (flag_threadsafe_statics): Declare it.
* c-common.c (flag_threadsafe_statics): Record it.
* doc/invoke.texi: Document it.
* tsystem.h (_GNU_SOURCE): Define.
* gthr-posix.h (__gthread_recursive_mutex_t): New typedef.
(__GTHREAD_RECURSIVE_MUTEX_INIT): New macro.
(__GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION): New macro.
(__gthread_recursive_mutex_init_function): New fn.
(__gthread_recursive_mutex_lock): New fn.
(__gthread_recursive_mutex_trylock): New fn.
(__gthread_recursive_mutex_unlock): New fn.
* gthr-solaris.h, gthr-single.h, gthr-dce.h: Likewise.
* gthr-win32.h, gthr-vxworks.h: Likewise.
* gthr.h: Document.
* libsupc++/guard.cc (static_mutex): Internal class implementing a
recursive mutex which controls initialization of local statics.
(__gnu_cxx::recursive_init): New exception class.
(__cxa_guard_acquire): Deal with locking and recursion detection.
(acquire_1, __cxa_guard_abort, __cxa_guard_release): Likewise.
From-SVN: r86687
* gthr-posix.h (__gthread_active_p): Move __gthread_active_ptr
into the function and constify it.
* gthr-dce.h, gthr-solaris.h: Likewise.
From-SVN: r50741
* gthr-posix.h (__gthread_active_ptr): Cast function pointer
to target type to allow ISO C++ compiler to accept it.
* gthr-dce.h (__gthread_active_ptr): Likewise.
* gthr-solaris.h (__gthread_active_ptr): Likewise.
Co-Authored-By: John David Anglin <dave@hiauly1.hia.nrc.ca>
From-SVN: r42725
* gthr.h: Changed the comment about return values.
* gthr-solaris.h (__gthread_once): Do not use errno; return the
error number instead of -1.
(__gthread_key_create): Any non-zero return value is an error.
* libgcc2.c (eh_context_initialize): Check for non-zero return
value from __gthread_once.
Check that the value of get_eh_context was really changed.
From-SVN: r18480
* Makefile.in (GTHREAD_FLAGS): New var.
(LIBGCC2_CFLAGS): Added $(GTHREAD_FLAGS).
(distclean): Remove gthr-default.h.
* configure.in: Accept dce as a thread package.
Check for thread.h and pthread.h.
Link gthr-default.h to appropriate thread file and set
gthread_flags.
(hppa1.1-*-hpux10*): If --enable-threads, use dce threads and
include multilib definitions from pa/t-dce-thr.
(sparc-*-solaris2*): Enable threads by default, if thread.h or
pthread.h is found, preferring posix threads over solaris ones.
* config/pa/t-dce-thr: New file.
* config/pa/t-pa: Removed multilibs.
* config/sparc/t-sol2: Ditto.
* gthr.h: New file.
* gthr-single.h: New file.
* gthr-posix.h: New file.
* gthr-solaris.h: New file.
* gthr-dce.h: New file.
* libgcc-thr.h: Removed.
* objc/thr-dce.c: New file copied from thr-decosf1.c.
* frame.c: Include gthr.h instead of libgcc-thr.h.
* libgcc2.c: Include gthr.h instead of libgcc-thr.h.
(eh_context_initialize): If __gthread_once fails, use static eh
context.
(eh_context_free): Call __gthread_key_dtor.
From-SVN: r17235