Recent changes to 13: Clang + libc++ crash

#13 Clang + libc++ crash

khizmax — Mon, 07 Jul 2014 16:31:06 -0000

See http://llvm.org/bugs/show_bug.cgi?id=18097

#13 Clang + libc++ crash

khizmax — Sun, 27 Oct 2013 16:05:49 -0000

Description has changed:

Diff:

--- old
+++ new
@@ -1,8 +1,10 @@
 Workaround: use libcds atomics. For that, in libcds 1.4 comment this lines in cds/comiler/clang/defs.h:

+~~~~~~
 // C++11 atomic support - only for libc++
 #if __has_feature(cxx_atomic) && defined(_LIBCPP_VERSION)
 #   define CDS_CXX11_ATOMIC_SUPPORT     1
-#endif 
+#endif
+~~~~~~ 

 It seems the problem in libc++ atomic implementation. Maybe, clang admits more aggresive optimization around "native" atomics. The problem is observed even in single-threaded apps. The core dumps point to inside of cds::memory::michael::Heap.

Group: 1.5.0 --> 1.6.0

Clang + libc++ crash

khizmax — Sun, 27 Oct 2013 16:00:32 -0000

Ticket 13 has been modified: Clang + libc++ crash
Edited By: khizmax (khizmax)
_milestone updated: u'1.5.0' => u'1.6.0'
Description updated:
--- description-old

+++ description-new

@@ -1,8 +1,10 @@

Workaround: use libcds atomics. For that, in libcds 1.4 comment this lines in cds/comiler/clang/defs.h:

+~~~~~~
// C++11 atomic support - only for libc++
#if __has_feature(cxx_atomic) && defined(_LIBCPP_VERSION)
# define CDS_CXX11_ATOMIC_SUPPORT 1
-#endif
+#endif
+~~~~~~

It seems the problem in libc++ atomic implementation. Maybe, clang admits more aggresive optimization around "native" atomics. The problem is observed even in single-threaded apps. The core dumps point to inside of cds::memory::michael::Heap.

Clang + libc++ crash

khizmax — Sun, 27 Oct 2013 16:00:32 -0000

Workaround: use libcds atomics. For that, in libcds 1.4 comment this lines in cds/comiler/clang/defs.h:

// C++11 atomic support - only for libc++

if __has_feature(cxx_atomic) && defined(_LIBCPP_VERSION)

define CDS_CXX11_ATOMIC_SUPPORT 1