Add context support with metadata description

[lttng-modules.git] / probes / lttng-perf-counters.c

diff --git a/probes/lttng-perf-counters.c b/probes/lttng-perf-counters.c
index c6620713c44d72f8f3ed8d082cb1e8ee65062ae3..cb0bdfc663f762c3e9fe7e29fa616e98b7915bbc 100644 (file)
--- a/probes/lttng-perf-counters.c
+++ b/probes/lttng-perf-counters.c
@@ -23,6 +23,16 @@
 static DEFINE_MUTEX(perf_counter_mutex);
 static LIST_HEAD(perf_counter_contexts);
 
+static
+size_t perf_counter_get_size(size_t offset)
+{
+       size_t size = 0;
+
+       size += lib_ring_buffer_align(offset, ltt_alignof(uint64_t));
+       size += sizeof(uint64_t);
+       return size;
+}
+
 static
 void perf_counter_record(struct lttng_ctx_field *field,
                         struct lib_ring_buffer_ctx *ctx,
@@ -34,8 +44,7 @@ void perf_counter_record(struct lttng_ctx_field *field,
        event = field->u.perf_counter.e[ctx->cpu];
        event->pmu->read(event);
        value = local64_read(&event->count);
-       lib_ring_buffer_align_ctx(ctx,
-               ltt_alignof(field->type.u.basic.integer.alignment / CHAR_BIT));
+       lib_ring_buffer_align_ctx(ctx, ltt_alignof(value));
        chan->ops->event_write(ctx, &value, sizeof(value));
 }
 
@@ -105,15 +114,16 @@ int lttng_add_perf_counter_to_ctx(uint32_t type,
        }
        field->destroy = lttng_destroy_perf_counter_field;
 
-       field->name = "dummyname";//TODO: lookup_counter_name(type, config);
-       field->type.atype = atype_integer;
-       field->type.u.basic.integer.size = sizeof(unsigned long) * CHAR_BIT;
-       field->type.u.basic.integer.alignment = ltt_alignof(unsigned long) * CHAR_BIT;
-       field->type.u.basic.integer.signedness = 0;
-       field->type.u.basic.integer.reverse_byte_order = 0;
-       field->type.u.basic.integer.base = 10;
-       field->type.u.basic.integer.encoding = lttng_encode_none;
-       field->callback = perf_counter_record;
+       field->event_field.name = "dummyname";//TODO: lookup_counter_name(type, config);
+       field->event_field.type.atype = atype_integer;
+       field->event_field.type.u.basic.integer.size = sizeof(unsigned long) * CHAR_BIT;
+       field->event_field.type.u.basic.integer.alignment = ltt_alignof(unsigned long) * CHAR_BIT;
+       field->event_field.type.u.basic.integer.signedness = is_signed_type(unsigned long);
+       field->event_field.type.u.basic.integer.reverse_byte_order = 0;
+       field->event_field.type.u.basic.integer.base = 10;
+       field->event_field.type.u.basic.integer.encoding = lttng_encode_none;
+       field->get_size = perf_counter_get_size;
+       field->record = perf_counter_record;
        field->u.perf_counter.e = events;
        field->u.perf_counter.attr = attr;