MaskRay added a comment. In your example, `clang++ a.cc; ./a.out` gives a libstdc++ error:
terminate called after throwing an instance of 'int' libc++'s is similar. footgun is nounwind (due to the GNU pure attribute), so Clang uses `call` instead of `invoke` and the function call does not get a call site entry in `.gcc_except_table`. In `_Unwind_RaiseException` called by `__cxa_throw`, the missing exception handler causes `__terminate`. `g++ a.cc; ./a.out` succeeds, likely because its `footgun` call is caught by `catch (...)`. The patch doesn't implement the runtime correctly (I get a linker error) so I cannot try it out. How expensive if your instrumentation? Does it work with `-fno-exceptions` intermediate functions? (Unwinding through such functions should fail as well). Note that this check can be done today,without any instrumentation: just use `-fno-asynchronous-unwind-tables` (for some targets which default to async unwind tables (aarch64,x86,etc)). Repository: rG LLVM Github Monorepo CHANGES SINCE LAST ACTION https://reviews.llvm.org/D137381/new/ https://reviews.llvm.org/D137381 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
