Date: Mon, 29 Jul 2019 06:13:23 +0000 (UTC) From: Dimitry Andric <dim@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: svn commit: r350400 - in stable: 11/contrib/libcxxrt 11/lib/libcxxrt 12/contrib/libcxxrt 12/lib/libcxxrt Message-ID: <201907290613.x6T6DN3k088289@repo.freebsd.org>
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Author: dim Date: Mon Jul 29 06:13:22 2019 New Revision: 350400 URL: https://svnweb.freebsd.org/changeset/base/350400 Log: MFC r350360: Merge libcxxrt master f96846efbfd508f66d91fcbbef5dd808947c7f6d. Interesting fixes: f96846e Fix std::size_t -> size_t to unbreak build against libc++ 6.0.0 6f4cfa2 Fix the uncaught exception count with rethrowing (PR 239265) db54f53 Added C++14-specific operator delete (#47) PR: 239265 Modified: stable/11/contrib/libcxxrt/exception.cc (contents, props changed) stable/11/contrib/libcxxrt/memory.cc (contents, props changed) stable/11/lib/libcxxrt/Makefile stable/11/lib/libcxxrt/Version.map Directory Properties: stable/11/ (props changed) stable/11/contrib/libcxxrt/abi_namespace.h (props changed) stable/11/contrib/libcxxrt/auxhelper.cc (props changed) stable/11/contrib/libcxxrt/cxxabi.h (props changed) stable/11/contrib/libcxxrt/dwarf_eh.h (props changed) stable/11/contrib/libcxxrt/dynamic_cast.cc (props changed) stable/11/contrib/libcxxrt/guard.cc (props changed) stable/11/contrib/libcxxrt/libelftc_dem_gnu3.c (props changed) stable/11/contrib/libcxxrt/stdexcept.cc (props changed) stable/11/contrib/libcxxrt/stdexcept.h (props changed) stable/11/contrib/libcxxrt/terminate.cc (props changed) stable/11/contrib/libcxxrt/typeinfo.cc (props changed) stable/11/contrib/libcxxrt/typeinfo.h (props changed) Changes in other areas also in this revision: Modified: stable/12/contrib/libcxxrt/exception.cc (contents, props changed) stable/12/contrib/libcxxrt/memory.cc (contents, props changed) stable/12/lib/libcxxrt/Makefile stable/12/lib/libcxxrt/Version.map Directory Properties: stable/12/ (props changed) stable/12/contrib/libcxxrt/abi_namespace.h (props changed) stable/12/contrib/libcxxrt/auxhelper.cc (props changed) stable/12/contrib/libcxxrt/cxxabi.h (props changed) stable/12/contrib/libcxxrt/dwarf_eh.h (props changed) stable/12/contrib/libcxxrt/dynamic_cast.cc (props changed) stable/12/contrib/libcxxrt/guard.cc (props changed) stable/12/contrib/libcxxrt/libelftc_dem_gnu3.c (props changed) stable/12/contrib/libcxxrt/stdexcept.cc (props changed) stable/12/contrib/libcxxrt/stdexcept.h (props changed) stable/12/contrib/libcxxrt/terminate.cc (props changed) stable/12/contrib/libcxxrt/typeinfo.cc (props changed) stable/12/contrib/libcxxrt/typeinfo.h (props changed) Modified: stable/11/contrib/libcxxrt/exception.cc ============================================================================== --- stable/11/contrib/libcxxrt/exception.cc Mon Jul 29 03:28:46 2019 (r350399) +++ stable/11/contrib/libcxxrt/exception.cc Mon Jul 29 06:13:22 2019 (r350400) @@ -879,6 +879,13 @@ extern "C" void __cxa_rethrow() assert(ex->handlerCount > 0 && "Rethrowing uncaught exception!"); + // `globals->uncaughtExceptions` was decremented by `__cxa_begin_catch`. + // It's normally incremented by `throw_exception`, but this path invokes + // `_Unwind_Resume_or_Rethrow` directly to rethrow the exception. + // This path is only reachable if we're rethrowing a C++ exception - + // foreign exceptions don't adjust any of this state. + globals->uncaughtExceptions++; + // ex->handlerCount will be decremented in __cxa_end_catch in enclosing // catch block @@ -1224,11 +1231,13 @@ extern "C" void *__cxa_begin_catch(void *e) // we see is a foreign exception then we won't have called it yet. __cxa_thread_info *ti = thread_info(); __cxa_eh_globals *globals = &ti->globals; - globals->uncaughtExceptions--; _Unwind_Exception *exceptionObject = static_cast<_Unwind_Exception*>(e); if (isCXXException(exceptionObject->exception_class)) { + // Only exceptions thrown with a C++ exception throwing function will + // increment this, so don't decrement it here. + globals->uncaughtExceptions--; __cxa_exception *ex = exceptionFromPointer(exceptionObject); if (ex->handlerCount == 0) @@ -1365,6 +1374,14 @@ extern "C" std::type_info *__cxa_current_exception_typ } /** + * Cleanup, ensures that `__cxa_end_catch` is called to balance an explicit + * `__cxa_begin_catch` call. + */ +static void end_catch(char *) +{ + __cxa_end_catch(); +} +/** * ABI function, called when an exception specification is violated. * * This function does not return. @@ -1372,6 +1389,12 @@ extern "C" std::type_info *__cxa_current_exception_typ extern "C" void __cxa_call_unexpected(void*exception) { _Unwind_Exception *exceptionObject = static_cast<_Unwind_Exception*>(exception); + // Wrap the call to the unexpected handler in calls to `__cxa_begin_catch` + // and `__cxa_end_catch` so that we correctly update exception counts if + // the unexpected handler throws an exception. + __cxa_begin_catch(exceptionObject); + __attribute__((cleanup(end_catch))) + char unused; if (exceptionObject->exception_class == exception_class) { __cxa_exception *ex = exceptionFromPointer(exceptionObject); Modified: stable/11/contrib/libcxxrt/memory.cc ============================================================================== --- stable/11/contrib/libcxxrt/memory.cc Mon Jul 29 03:28:46 2019 (r350399) +++ stable/11/contrib/libcxxrt/memory.cc Mon Jul 29 06:13:22 2019 (r350400) @@ -151,4 +151,21 @@ void operator delete[](void * ptr) NOEXCEPT ::operator delete(ptr); } +// C++14 additional delete operators +#if __cplusplus >= 201402L + +__attribute__((weak)) +void operator delete(void * ptr, size_t) NOEXCEPT +{ + ::operator delete(ptr); +} + + +__attribute__((weak)) +void operator delete[](void * ptr, size_t) NOEXCEPT +{ + ::operator delete(ptr); +} + +#endif Modified: stable/11/lib/libcxxrt/Makefile ============================================================================== --- stable/11/lib/libcxxrt/Makefile Mon Jul 29 03:28:46 2019 (r350399) +++ stable/11/lib/libcxxrt/Makefile Mon Jul 29 06:13:22 2019 (r350400) @@ -23,7 +23,7 @@ SRCS+= libelftc_dem_gnu3.c\ WARNS= 0 CFLAGS+= -isystem ${SRCDIR} -nostdinc++ .if empty(CXXFLAGS:M-std=*) -CXXFLAGS+= -std=c++11 +CXXFLAGS+= -std=c++14 .endif VERSION_MAP= ${.CURDIR}/Version.map Modified: stable/11/lib/libcxxrt/Version.map ============================================================================== --- stable/11/lib/libcxxrt/Version.map Mon Jul 29 03:28:46 2019 (r350399) +++ stable/11/lib/libcxxrt/Version.map Mon Jul 29 06:13:22 2019 (r350400) @@ -277,6 +277,10 @@ CXXABI_1.3.9 { "typeinfo name for unsigned __int128 const*"; "typeinfo name for unsigned __int128"; "typeinfo name for unsigned __int128*"; + "operator delete[](void*, unsigned int)"; + "operator delete(void*, unsigned int)"; + "operator delete[](void*, unsigned long)"; + "operator delete(void*, unsigned long)"; }; } CXXABI_1.3.6;
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