Function to mangle/demangle functions

Question

I have previously, here, been shown that C++ functions aren\'t easily represented in assembly. Now I am interested in reading them one way or another because Callgrind, part

Answer 1

This is a slight variation on Dave's version above. This is a unique_ptr version with a little bit of checking on the return type, though it looks like you could just ignore that, but somehow that just seems unclean.

auto cppDemangle (const char *abiName)
{
    //
    // This function allocates and returns storage in ret
    //
    int status;
    char *ret = abi::__cxa_demangle(abiName, 0 /* output buffer */, 0 /* length */, &status);

    auto deallocator = ( [](char *mem) { if (mem) free((void*)mem); } );

    if (status) {
        // 0: The demangling operation succeeded.
        // -1: A memory allocation failure occurred.
        // -2: mangled_name is not a valid name under the C++ ABI mangling rules.
        // -3: One of the arguments is invalid.
        std::unique_ptr retval(nullptr, deallocator);
    }

    //
    // Create a unique pointer to take ownership of the returned string so it
    // is freed when that pointers goes out of scope
    //
    std::unique_ptr retval(ret, deallocator);
    return retval;
}