Write context fields into trace

[lttng-modules.git] / ltt-ring-buffer-client.h

diff --git a/ltt-ring-buffer-client.h b/ltt-ring-buffer-client.h
index 1c3d014d43cd8248a2aca5d65faff48f8935193a..8095eb6e73abf53a242abafc424559f7ddb3f54a 100644 (file)
--- a/ltt-ring-buffer-client.h
+++ b/ltt-ring-buffer-client.h
@@ -55,6 +55,32 @@ static inline notrace u64 lib_ring_buffer_clock_read(struct channel *chan)
        return trace_clock_read64();
 }
 
+static inline
+size_t ctx_get_size(size_t offset, struct lttng_ctx *ctx)
+{
+       int i;
+       size_t orig_offset = offset;
+
+       if (likely(!ctx))
+               return 0;
+       for (i = 0; i < ctx->nr_fields; i++)
+               offset += ctx->fields[i].get_size(offset);
+       return offset - orig_offset;
+}
+
+static inline
+void ctx_record(struct lib_ring_buffer_ctx *bufctx,
+               struct ltt_channel *chan,
+               struct lttng_ctx *ctx)
+{
+       int i;
+
+       if (likely(!ctx))
+               return;
+       for (i = 0; i < ctx->nr_fields; i++)
+               ctx->fields[i].record(&ctx->fields[i], bufctx, chan);
+}
+
 /*
  * record_header_size - Calculate the header size and padding necessary.
  * @config: ring buffer instance configuration
@@ -75,6 +101,7 @@ unsigned char record_header_size(const struct lib_ring_buffer_config *config,
                                 struct lib_ring_buffer_ctx *ctx)
 {
        struct ltt_channel *ltt_chan = channel_get_private(chan);
+       struct ltt_event *event = ctx->priv;
        size_t orig_offset = offset;
        size_t padding;
 
@@ -113,6 +140,9 @@ unsigned char record_header_size(const struct lib_ring_buffer_config *config,
        default:
                WARN_ON_ONCE(1);
        }
+       offset += ctx_get_size(offset, event->ctx);
+       offset += ctx_get_size(offset, ltt_chan->ctx);
+       offset += ctx_get_size(offset, ltt_chan->session->ctx);
 
        *pre_header_padding = padding;
        return offset - orig_offset;
@@ -140,6 +170,7 @@ void ltt_write_event_header(const struct lib_ring_buffer_config *config,
                            uint32_t event_id)
 {
        struct ltt_channel *ltt_chan = channel_get_private(ctx->chan);
+       struct ltt_event *event = ctx->priv;
 
        if (unlikely(ctx->rflags))
                goto slow_path;
@@ -166,6 +197,11 @@ void ltt_write_event_header(const struct lib_ring_buffer_config *config,
        default:
                WARN_ON_ONCE(1);
        }
+
+       ctx_record(ctx, ltt_chan, event->ctx);
+       ctx_record(ctx, ltt_chan, ltt_chan->ctx);
+       ctx_record(ctx, ltt_chan, ltt_chan->session->ctx);
+
        return;
 
 slow_path:
@@ -177,6 +213,7 @@ void ltt_write_event_header_slow(const struct lib_ring_buffer_config *config,
                                 uint32_t event_id)
 {
        struct ltt_channel *ltt_chan = channel_get_private(ctx->chan);
+       struct ltt_event *event = ctx->priv;
 
        switch (ltt_chan->header_type) {
        case 1: /* compact */
@@ -223,6 +260,9 @@ void ltt_write_event_header_slow(const struct lib_ring_buffer_config *config,
        default:
                WARN_ON_ONCE(1);
        }
+       ctx_record(ctx, ltt_chan, event->ctx);
+       ctx_record(ctx, ltt_chan, ltt_chan->ctx);
+       ctx_record(ctx, ltt_chan, ltt_chan->session->ctx);
 }
 
 static const struct lib_ring_buffer_config client_config;