Fix: pad strings that are modified concurrently with tracing

[lttng-ust.git] / liblttng-ust / lttng-ring-buffer-client.h

diff --git a/liblttng-ust/lttng-ring-buffer-client.h b/liblttng-ust/lttng-ring-buffer-client.h
index 87d1a8cdb3fe98fca98dcc051e4ab591e65a8269..e734632ff05368cb298e23faeeb9fa8bfad0965a 100644 (file)
--- a/liblttng-ust/lttng-ring-buffer-client.h
+++ b/liblttng-ust/lttng-ring-buffer-client.h
@@ -601,6 +601,13 @@ void lttng_event_write(struct lttng_ust_lib_ring_buffer_ctx *ctx, const void *sr
        lib_ring_buffer_write(&client_config, ctx, src, len);
 }
 
+static
+void lttng_event_strcpy(struct lttng_ust_lib_ring_buffer_ctx *ctx, const char *src,
+                    size_t len)
+{
+       lib_ring_buffer_strcpy(&client_config, ctx, src, len, '#');
+}
+
 #if 0
 static
 wait_queue_head_t *lttng_get_reader_wait_queue(struct channel *chan)
@@ -651,6 +658,7 @@ static struct lttng_transport lttng_relay_transport = {
        .ops = {
                .channel_create = _channel_create,
                .channel_destroy = lttng_channel_destroy,
+               .u.has_strcpy = 1,
                .event_reserve = lttng_event_reserve,
                .event_commit = lttng_event_commit,
                .event_write = lttng_event_write,
@@ -660,6 +668,7 @@ static struct lttng_transport lttng_relay_transport = {
                .is_finalized = lttng_is_finalized,
                .is_disabled = lttng_is_disabled,
                .flush_buffer = lttng_flush_buffer,
+               .event_strcpy = lttng_event_strcpy,
        },
        .client_config = &client_config,
 };