问题
I have read this blog post, this documentation page and this example, but I still don't understand how to throw a basic exception using the LLVM's IRBuilder for a non-C++ oriented language.
From my understanding, I have to :
- Create a
llvm::Valuecontaining the throwed value. - Call "a function", passing it the throwed value. This function will not return.
The example is using a system rewinding function (_Unwind_RaiseException) in order to throw a C++ exception, and I don't really understand how to use my own raising function instead (since I only need to throw an object pointer). What am I missing ?
回答1:
Short answer is that _Unwind_RaiseException is not a C++-specific function. It comes from the libunwind library, and allows to throw any type of exception.
More details can be found on these blog posts.
回答2:
As you don't want to use existing C++ exception handling infrastructure, you'll need to replicate parts of it for your language.
You can use the implementation of C unwinder in compiler-rt (or significantly more complex one in libstdc++), and invocation of an unwinder in libstdc++ to start with.
来源：https://stackoverflow.com/questions/14824906/llvm-exception-throwing