Stefan Hajnoczi <stefa...@gmail.com> writes:
[...]
> So forget I said "self-describing" :). I think the only changes from
> the v1 format we need are:
>
> 1. New magic number to mark v2 format.
>
> 2. Trace records are no longer fixed-length, they include a size field:
>
> typedef struct {
> uint32_t length; /* in bytes */
> uint32_t reserved; /* unused */
> uint64_t event;
> uint64_t timestamp_ns;
> uint8_t arguments[];
> } TraceRecord;
>
> 3. Strings are serialized like this:
>
> uint16_t length;
> char chars[length];
16 bit length? Sure you want that?
> These changes enable:
>
> 1. Variable number of trace event arguments.
>
> 2. Variable-length strings.
Byte strings, i.e. zero bytes not special.
