Right... So then I imagine even the 'fix' where I'm compiling exception destructor into a separate .so file is still subject to breakage and std::exception catching works because every C++ program actually links against libstdc++ and not just dlopens it, yes? Dimitri. On Mon, Aug 30, 2010 at 4:51 PM, Ian Lance Taylor <iant@xxxxxxxxxx> wrote: > Dimitri Tcaciuc <dtcaciuc@xxxxxxxxx> writes: > >> Now, according to `dlopen` manual, I have to load with RTLD_GLOBAL for >> RTTI to function properly. > > Yes. Anything else is unsupported. Even if we explain how it all works > today, it may change tomorrow. > > Basically, it works by doing pointer comparisons on the RTTI > information. That works reliably when using RTLD_GLOBAL. When using > RTLD_LOCAL, whether it works depends on exactly where the code creating > the object runs, because where that code runs determines which pointer > it will get when it refers to the symbol containing the type > information. > > Ian >
