Re: Exception handling in clang

[David Chisnall]

Did you remember to update the LLVM tree too?  Clang trunk requires  
LLVM trunk. The exception stuff was committed with r71198, and I've  
just sent a patch to the cfe-dev list which fixes @catch(RealClassName  
*foo) as well.

The only thing missing now is @sychronized.  For me, gcc emits code  
which fails to link.  Is anyone using @synchronized with GNUstep?  If  
so, where do you get your implementations of the two functions which  
acquire and release a mutex identified by a given object?

David

On 8 May 2009, at 13:58, Pete French wrote:

> > I've just committed initial support for 'zero-cost' exception  
> > handling
> > in clang.  Currently this only works for @finally and for @catch'ing
> > id types (I plan on fixing that limitation soon).  I'd appreciate it
> > if anyone who has code which uses exceptions could test this.  The
> > support should currently be enough for anything using NS_DURING and
> > friends to compile with zero-cost exceptions, rather than setjmp/
> > longjmp.
>
> Is this in the llvm/clang svn tree ? I've been trying to do an update
> and get this compiled today (revision 71215), but it fails for me:
>
> llvm[4]: Compiling ASTContext.cpp for Debug build
> In file included from /usr/home/petefrench/llvm-clang/llvm/tools/ 
> clang/lib/AST/../../include/clang/AST/DeclBase.h:18,
>                 from /usr/home/petefrench/llvm-clang/llvm/tools/ 
> clang/lib/AST/../../include/clang/AST/Decl.h:17,
>                 from /usr/home/petefrench/llvm-clang/llvm/tools/ 
> clang/lib/AST/../../include/clang/AST/ASTContext.h:21,
>                 from ASTContext.cpp:14:
> /usr/home/petefrench/llvm-clang/llvm/include/llvm/ADT/ 
> PointerIntPair.h: In instantiation of  
> 'llvm::PointerIntPair<clang::Type*, 3u, unsigned int,  
> llvm::PointerLikeTypeTraits<clang::Type*> >':
> /usr/home/petefrench/llvm-clang/llvm/tools/clang/lib/AST/../../ 
> include/clang/AST/Type.h:76:   instantiated from here
> /usr/home/petefrench/llvm-clang/llvm/include/llvm/ADT/ 
> PointerIntPair.h:43: warning: left shift count >= width of type
> /usr/home/petefrench/llvm-clang/llvm/include/llvm/ADT/ 
> PointerIntPair.h:43: error: overflow in constant expression
> /usr/home/petefrench/llvm-clang/llvm/include/llvm/ADT/ 
> PointerIntPair.h: In member function 'IntType  
> llvm::PointerIntPair<PointerTy, IntBits, IntType,  
> PtrTraits>::getInt() const [with PointerTy = clang::Type*, unsigned  
> int IntBits = 3u, IntType = unsigned int, PtrTraits =  
> llvm::PointerLikeTypeTraits<clang::Type*>]':
> /usr/home/petefrench/llvm-clang/llvm/tools/clang/lib/AST/../../ 
> include/clang/AST/Type.h:96:   instantiated from here
> /usr/home/petefrench/llvm-clang/llvm/include/llvm/ADT/ 
> PointerIntPair.h:72: warning: right shift count >= width of type
> /usr/home/petefrench/llvm-clang/llvm/include/llvm/ADT/ 
> PointerIntPair.h: In member function 'void  
> llvm::PointerIntPair<PointerTy, IntBits, IntType,  
> PtrTraits>::setInt(IntType) [with PointerTy = clang::Type*, unsigned  
> int IntBits = 3u, IntType = unsigned int, PtrTraits =  
> llvm::PointerLikeTypeTraits<clang::Type*>]':
> /usr/home/petefrench/llvm-clang/llvm/tools/clang/lib/AST/../../ 
> include/clang/AST/Type.h:97:   instantiated from here
> /usr/home/petefrench/llvm-clang/llvm/include/llvm/ADT/ 
> PointerIntPair.h:88: warning: overflow in implicit constant conversion
> /usr/home/petefrench/llvm-clang/llvm/include/llvm/ADT/ 
> PointerIntPair.h:89: warning: left shift count >= width of type
> gmake[4]: *** [/usr/home/petefrench/llvm-clang/llvm/tools/clang/lib/ 
> AST/Debug/ASTContext.o] Error 1
>
> -pete.
>
>
> _______________________________________________
> Gnustep-dev mailing list
> address@hidden
> http://lists.gnu.org/mailman/listinfo/gnustep-dev