Method read

src/io/mmap_memory_source.cpp:79–88

    const std::string& name() const override { return name_; }

    std::size_t read(u64 offset, void* out, std::size_t len) const override {
        if (offset >= size_) return 0;
        // Overflow-safe clamp: `offset + len` can wrap for a huge len and skip
        // the bound, letting memcpy read past the mapped view (OOB). offset <
        // size_ here, so `size_ - offset` is always a safe positive bound.
        if (len > size_ - offset) len = static_cast<std::size_t>(size_ - offset);
        // Page-fault on demand; OS prefetcher handles streaming patterns.
        std::memcpy(out, static_cast<const u8*>(view_) + offset, len);
        return len;
    }

private:
    std::string name_;