Method alloc

src/instrument.cpp:238–245

    // Writer

    u8* alloc(int bytes) {
        if (_dst_len + bytes > _dst_capacity) {
            grow(_dst_len + bytes + 2000);
        }
        u8* result = _dst + _dst_len;
        _dst_len += bytes;
        return result;
    }

    void grow(int new_capacity) {
        u8* new_dst = NULL;