__lttng_ctx.struct_size = sizeof(struct lttng_ust_stack_ctx); \
__lttng_ctx.event_recorder = __event_recorder; \
lib_ring_buffer_ctx_init(&__ctx, __chan->chan, &__lttng_ctx, __event_len, \
__lttng_ctx.struct_size = sizeof(struct lttng_ust_stack_ctx); \
__lttng_ctx.event_recorder = __event_recorder; \
lib_ring_buffer_ctx_init(&__ctx, __chan->chan, &__lttng_ctx, __event_len, \