Add context support with metadata description

[lttng-modules.git] / probes / lttng-context-pid.c

diff --git a/probes/lttng-context-pid.c b/probes/lttng-context-pid.c
index 669e593fa1d50152362d191955118266f585b458..81dbe4a6c7292f1c568873145d7c3a02dc8baab4 100644 (file)
--- a/probes/lttng-context-pid.c
+++ b/probes/lttng-context-pid.c
@@ -15,6 +15,16 @@
 #include "../wrapper/vmalloc.h"
 #include "../ltt-tracer.h"
 
+static
+size_t pid_get_size(size_t offset)
+{
+       size_t size = 0;
+
+       size += lib_ring_buffer_align(offset, ltt_alignof(pid_t));
+       size += sizeof(pid_t);
+       return size;
+}
+
 static
 void pid_record(struct lttng_ctx_field *field,
                struct lib_ring_buffer_ctx *ctx,
@@ -35,18 +45,20 @@ int lttng_add_pid_to_ctx(struct lttng_ctx **ctx)
        field = lttng_append_context(ctx);
        if (!field)
                return ret;
-       field->name = "pid";
-       field->type.atype = atype_integer;
-       field->type.u.basic.integer.size = sizeof(pid_t) * CHAR_BIT;
-       field->type.u.basic.integer.alignment = ltt_alignof(pid_t) * CHAR_BIT;
-       field->type.u.basic.integer.signedness = is_signed_type(pid_t);
-       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 = pid_record;
+       field->event_field.name = "pid";
+       field->event_field.type.atype = atype_integer;
+       field->event_field.type.u.basic.integer.size = sizeof(pid_t) * CHAR_BIT;
+       field->event_field.type.u.basic.integer.alignment = ltt_alignof(pid_t) * CHAR_BIT;
+       field->event_field.type.u.basic.integer.signedness = is_signed_type(pid_t);
+       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 = pid_get_size;
+       field->record = pid_record;
        wrapper_vmalloc_sync_all();
        return 0;
 }
+EXPORT_SYMBOL_GPL(lttng_add_pid_to_ctx);
 
 MODULE_LICENSE("GPL and additional rights");
 MODULE_AUTHOR("Mathieu Desnoyers");