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ring buffer: handle shmp errors
[lttng-ust.git]
/
libringbuffer
/
frontend.h
diff --git
a/libringbuffer/frontend.h
b/libringbuffer/frontend.h
index 8c8517086828d1fc5c9cf2bf2c780b8a933fc653..160fd45532f39573b09178f6924bba71b1f65264 100644
(file)
--- a/
libringbuffer/frontend.h
+++ b/
libringbuffer/frontend.h
@@
-162,9
+162,14
@@
static inline
void lib_ring_buffer_put_next_subbuf(struct lttng_ust_lib_ring_buffer *buf,
struct lttng_ust_shm_handle *handle)
{
void lib_ring_buffer_put_next_subbuf(struct lttng_ust_lib_ring_buffer *buf,
struct lttng_ust_shm_handle *handle)
{
+ struct channel *chan;
+
+ chan = shmp(handle, buf->backend.chan);
+ if (!chan)
+ return;
lib_ring_buffer_put_subbuf(buf, handle);
lib_ring_buffer_put_subbuf(buf, handle);
- lib_ring_buffer_move_consumer(buf, subbuf_align(buf->cons_snapshot,
-
shmp(handle, buf->backend.chan)),
handle);
+ lib_ring_buffer_move_consumer(buf, subbuf_align(buf->cons_snapshot,
chan),
+ handle);
}
extern void channel_reset(struct channel *chan);
}
extern void channel_reset(struct channel *chan);
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