try, throw, and catch need extra runtime machinery to create exception objects, unwind the stack, run destructors during unwinding, and transfer control to a matching handler. The bundled WebAssembly C++ runtime does not include that machinery, which is why symbols such as __cxa_throw are missing.
try,throw, andcatchneed extra runtime machinery to create exception objects, unwind the stack, run destructors during unwinding, and transfer control to a matching handler. The bundled WebAssembly C++ runtime does not include that machinery, which is why symbols such as__cxa_throware missing.