GSoC Project | Basic Support for Trace Compass

[Sebastian Huber]

On 16/07/2019 13:06, Ravindra Kumar Meena wrote:
>     Very good, please change now the format of the event header to the one
>     used by LTTNG:
> 
>     struct event_header_compact {
>              enum : uint5_t { compact = 0 ... 30, extended = 31 } id;
>              variant <id> {
>                      struct {
>                              uint27_clock_monotonic_t timestamp;
>                      } compact;
>                      struct {
>                              uint32_t id;
>                              uint64_clock_monotonic_t timestamp;
>                      } extended;
>              } v;
>     } align(8);
> 
> 
> We need it in client-side also. I think C does not have variant data type.

In C you can do everything what software can do.

You should have already a Git clone of lttng-ust. In 
"liblttng-ust/lttng-ring-buffer-client.h" see lttng_write_event_header().

-- 
Sebastian Huber, embedded brains GmbH

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