445cf5eb0d
libstdc++:
Add memory barriers to the double-checked locking used for static
initialization.
* libsupc++/guard.cc (__test_and_acquire): Define default.
(_GLIBCXX_GUARD_TEST_AND_ACQUIRE, __set_and_release)
(_GLIBCXX_GUARD_SET_AND_RELEASE): Likewise.
(recursion_push, recursion_pop): New abstraction functions.
(__cxa_guard_acquire): Use _GLIBCXX_GUARD_TEST_AND_ACQUIRE.
(__cxa_guard_release): Use _GLIBCXX_GUARD_SET_AND_RELEASE.
* config/cpu/generic/cxxabi_tweaks.h (_GLIBCXX_GUARD_TEST): Rename
from _GLIBCXX_GUARD_ACQUIRE and reverse sense.
(_GLIBCXX_GUARD_SET): Rename from _GLIBCXX_GUARD_RELEASE.
* config/cpu/arm/cxxabi_tweaks.h: Likewise.
* config/cpu/alpha/atomic_word.h (_GLIBCXX_READ_MEM_BARRIER)
(_GLIBCXX_WRITE_MEM_BARRIER): Define.
* config/cpu/powerpc/atomic_word.h: Likewise.
* config/cpu/sparc/atomic_word.h: Likewise.
* config/cpu/generic/atomic_word.h: Define them, commented out.
* include/bits/atomicity.h: Define defaults.
* config/cpu/ia64/atomic_word.h (__test_and_acquire)
(__set_and_release): New inlines.
(_GLIBCXX_GUARD_TEST_AND_ACQUIRE): Define.
(_GLIBCXX_GUARD_SET_AND_RELEASE): Define.
* libsupc++/guard.cc (acquire_1): Use __builtin_trap instead of
abort();
gcc:
* doc/tm.texi (TARGET_RELAXED_ORDERING): Document.
* target.h (struct gcc_target): Add relaxed_ordering field.
* target-def.h (TARGET_RELAXED_ORDERING): Define default.
(TARGET_INITIALIZER): Add it.
* config/alpha/alpha.c (TARGET_RELAXED_ORDERING): Define.
* config/ia64/ia64.c (TARGET_RELAXED_ORDERING): Define.
* config/rs6000/rs6000.c (TARGET_RELAXED_ORDERING): Define.
* config/sparc/sparc.c (TARGET_RELAXED_ORDERING): Define.
* cp/decl.c (expand_static_init): Don't use shortcut if
targetm.relaxed_ordering.
From-SVN: r92659
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|---|---|---|
| .. | ||
| cxxabi.h | ||
| del_op.cc | ||
| del_opnt.cc | ||
| del_opv.cc | ||
| del_opvnt.cc | ||
| eh_alloc.cc | ||
| eh_aux_runtime.cc | ||
| eh_catch.cc | ||
| eh_exception.cc | ||
| eh_globals.cc | ||
| eh_personality.cc | ||
| eh_term_handler.cc | ||
| eh_terminate.cc | ||
| eh_throw.cc | ||
| eh_type.cc | ||
| eh_unex_handler.cc | ||
| exception | ||
| exception_defines.h | ||
| guard.cc | ||
| Makefile.am | ||
| Makefile.in | ||
| new | ||
| new_handler.cc | ||
| new_op.cc | ||
| new_opnt.cc | ||
| new_opv.cc | ||
| new_opvnt.cc | ||
| pure.cc | ||
| tinfo2.cc | ||
| tinfo.cc | ||
| tinfo.h | ||
| typeinfo | ||
| unwind-cxx.h | ||
| vec.cc | ||
| vterminate.cc | ||