[LLVMdev] dynamic_cast error detection

[Somorjai, Akos]

Hello Duncan,

Grazie! I've already did that.

Best, Akos

On Sep 2, 2012, at 10:02 AM, Duncan Sands <baldrick at free.fr> wrote:

> Hi Akos, you should send this to the clang mailing list instead.
> 
> Ciao, Duncan.
> 
>> I'm trying to convert our code base from GCC 4.0 to LLVM (on mac OS X), and ran
>> into a problem. In the past we used mach_override and the dynamic_cast source to
>> override the built-in dynamic_cast operator to detect shared library issues
>> (http://gcc.gnu.org/faq.html#dso). Basically we'd assert at runtime when a
>> duplicated RTTI is found, giving us a chance to backtrace the offending class.
>> 
>> I'm looking for a better solution with llvm; I know about -Wweak–vtables, but
>> compiling with it gives me hundreds of errors, and some of them are false positives.
>> So is there any legal way of catching dynamic_cast problems? Maybe
>> dyld_interposing? I'd like to avoid replacing all dynamic_casts with another
>> call if possible (because there are several hundreds of those calls).
>> 
>> Thanks in advance, Akos
>> 
>> 
>> 
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> 
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