diff options
author | Stephan Bergmann <sbergman@redhat.com> | 2013-02-14 15:21:46 +0100 |
---|---|---|
committer | Miklos Vajna <vmiklos@suse.cz> | 2013-02-18 11:05:34 +0000 |
commit | 963f9d31675706ac46a71687f6e6d561ba147c9d (patch) | |
tree | 3983298c4d0795e60cc0b36b47f8be8347b2d5da | |
parent | 2c4d36b7d6da9f9b578d903499844930f90c8faf (diff) |
rhbz#908674: Adapt rtl::Allocator::construct to C++11
...otherwise, at least with some --with-system-boost versions and C++11
compilers, like with Fedora's boost-1.50.0-4.fc18.x86_64 and
gcc-c++-4.7.2-8.fc18.x86_64, using this to copy-construct an instance of
boost::unordered::detail::ptr_node<std::pair<rtl::OUString,Bootstrap_Impl*>> in
the call to p_bootstrap_map->insert(...) in rtl_bootstrap_args_open
(sal/rtl/source/bootstrap.cxx) would memcopy the ptr_node and fail to call
rtl_uString_acquire, leading to memory corruption later on when
rtl_uString_release is called one time too often.
It is not entirely clear to me whether this is a shortcoming of the given Boost
version, but this patch solves the problem and brings rtl::Allocator::construct
in line with the (changed) Allocator requirements of C++11 anyway.
The problem potentially lurks with every use of rtl::Allocator, but only showed
now begining with LO 4.0 where e5111574fd904b38a3980ca4ea3d21cfcb22dea6 "Revert
'sb140: sb140: #i116981# clean up memory upon exit'" re-introduced code into
rtl_bootstrap_args_open that inserts into a boost::unordered_map that uses
rtl::Allocator.
(cherry picked from commit c91d353872b7d4e1a39192bff1444b46cab6e5eb)
Conflicts:
config_host/config_global.h.in
...solved by resorting to the old -DHAVE_CXX11_PERFECT_FORWARDING logic spread
across various solenv/.../*.mk instead.
(cherry picked from commit https://gerrit.libreoffice.org/#/c/2166/1)
Conflicts:
configure.ac
solenv/gbuild/platform/com_GCC_defs.mk
solenv/gbuild/platform/com_MSC_defs.mk
Change-Id: I3be22f59a8eb49d31458480c27f3ce15803c7fd4
Reviewed-on: https://gerrit.libreoffice.org/2167
Reviewed-by: Eike Rathke <erack@redhat.com>
Tested-by: Miklos Vajna <vmiklos@suse.cz>
-rw-r--r-- | config_host.mk.in | 1 | ||||
-rw-r--r-- | configure.in | 26 | ||||
-rw-r--r-- | sal/inc/rtl/allocator.hxx | 8 | ||||
-rw-r--r-- | solenv/gbuild/platform/com_GCC_defs.mk | 6 | ||||
-rw-r--r-- | solenv/inc/settings.mk | 4 |
5 files changed, 45 insertions, 0 deletions
diff --git a/config_host.mk.in b/config_host.mk.in index 4fb80d1f8679..27f260ec86f0 100644 --- a/config_host.mk.in +++ b/config_host.mk.in @@ -196,6 +196,7 @@ export GUIBASE_FOR_BUILD=@GUIBASE_FOR_BUILD@ export GUI_FOR_BUILD=@GUI_FOR_BUILD@ export GXX_INCLUDE_PATH=@GXX_INCLUDE_PATH@ export HAVE_CXX0X=@HAVE_CXX0X@ +export HAVE_CXX11_PERFECT_FORWARDING=@HAVE_CXX11_PERFECT_FORWARDING@ export HAVE_GCC_AVX=@HAVE_GCC_AVX@ export HAVE_GCC_GGDB2=@HAVE_GCC_GGDB2@ export HAVE_GCC_FINLINE_LIMIT=@HAVE_GCC_FINLINE_LIMIT@ diff --git a/configure.in b/configure.in index e81566e1710f..071380a92638 100644 --- a/configure.in +++ b/configure.in @@ -4781,6 +4781,32 @@ AC_SUBST(HAVE_GCC_NO_LONG_DOUBLE) AC_SUBST(HAVE_GCC_AVX) dnl =================================================================== +dnl Check for C++11 perfect forwarding support +dnl =================================================================== +HAVE_CXX11_PERFECT_FORWARDING= +AC_MSG_CHECKING([whether $CXX supports C++11 perfect forwarding]) +save_CXXFLAGS=$CXXFLAGS +if test "$HAVE_CXX0X" = TRUE; then + CXXFLAGS="$CXXFLAGS -std=gnu++0x" +fi +AC_LANG_PUSH([C++]) +AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ + #include <utility> + template<typename T, typename... Args> T * f(Args &&... v) { + return new T(std::forward<Args>(v)...); + } + ]], [[ + f<int>(0); + ]])], [perfect_forwarding=yes], [perfect_forwarding=no]) +AC_LANG_POP([C++]) +CXXFLAGS=$save_CXXFLAGS +AC_MSG_RESULT([$perfect_forwarding]) +if test "$perfect_forwarding" = yes; then + HAVE_CXX11_PERFECT_FORWARDING=TRUE +fi +AC_SUBST([HAVE_CXX11_PERFECT_FORWARDING]) + +dnl =================================================================== dnl system stl sanity tests dnl =================================================================== HAVE_GCC_VISIBILITY_BROKEN= diff --git a/sal/inc/rtl/allocator.hxx b/sal/inc/rtl/allocator.hxx index 36bbd0036685..10f298a22637 100644 --- a/sal/inc/rtl/allocator.hxx +++ b/sal/inc/rtl/allocator.hxx @@ -139,10 +139,18 @@ public: } //----------------------------------------- +#if defined HAVE_CXX11_PERFECT_FORWARDING + template< typename... Args > + void construct (pointer p, Args &&... value) + { + new ((void*)p)T(std::forward< Args >(value)...); + } +#else void construct (pointer p, const T& value) { new ((void*)p)T(value); } +#endif //----------------------------------------- void destroy (pointer p) diff --git a/solenv/gbuild/platform/com_GCC_defs.mk b/solenv/gbuild/platform/com_GCC_defs.mk index 60ae0c355f31..58d8b2928420 100644 --- a/solenv/gbuild/platform/com_GCC_defs.mk +++ b/solenv/gbuild/platform/com_GCC_defs.mk @@ -57,6 +57,12 @@ gb_COMPILERDEFS := \ -DCPPU_ENV=gcc3 \ -DGXX_INCLUDE_PATH=$(GXX_INCLUDE_PATH) \ +ifeq ($(HAVE_CXX11_PERFECT_FORWARDING),TRUE) +gb_COMPILERDEFS += \ + -DHAVE_CXX11_PERFECT_FORWARDING \ + +endif + gb_CFLAGS_COMMON := \ -Wall \ -Wendif-labels \ diff --git a/solenv/inc/settings.mk b/solenv/inc/settings.mk index ea4bb0ed6652..2f940f82c1ac 100644 --- a/solenv/inc/settings.mk +++ b/solenv/inc/settings.mk @@ -815,6 +815,10 @@ CDEFS+=$(CDEFS_PRESET) CDEFS+=-DTIMELOG .ENDIF +.IF "$(HAVE_CXX11_PERFECT_FORWARDING)" == "TRUE" +CDEFS += -DHAVE_CXX11_PERFECT_FORWARDING +.ENDIF + CDEFSCXX= CDEFSOBJ= #CDEFSMT=-DMULTITHREAD |