Method rewrite

src/instrument.cpp:342–377

    }

    void rewrite(u8** new_class_data, int* new_class_data_len) {
        if (VM::jvmti()->Allocate(_dst_capacity, &_dst) != 0) {
            return;
        }

        Result res = rewriteClass();
        if (res == Result::OK) {
            *new_class_data = _dst;
            *new_class_data_len = _dst_len;
            return;
        }

        VM::jvmti()->Deallocate(_dst);

        std::string class_name = _class_name->toString();
        std::string method_name = _method_name ? _method_name->toString() : "n/a";
        switch (res) {
            case Result::METHOD_TOO_LARGE:
                Log::warn("Method too large: %s.%s", class_name.c_str(), method_name.c_str());
                break;
            case Result::BAD_FULL_FRAME:
                Log::warn("Unsupported full_frame: %s.%s", class_name.c_str(), method_name.c_str());
                break;
            case Result::JUMP_OVERFLOW:
                Log::warn("Jump overflow: %s.%s", class_name.c_str(), method_name.c_str());
                break;
            case Result::PROFILER_CLASS:
                Log::trace("Skipping instrumentation of %s: internal profiler class", class_name.c_str());
                break;
            case Result::ABORTED:
                // Nothing to do
                break;
            default:
                break;
        }
    }

    static u16 instructionBytes(const u8* code, u16 index) {
        static constexpr unsigned char OPCODE_LENGTH[JVM_OPC_MAX+1] = JVM_OPCODE_LENGTH_INITIALIZER;