+++ /dev/null
-/*
- * SPDX-License-Identifier: LGPL-2.1-only
- *
- * Copyright (C) 2009-2015 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
- * LTTng UST CPU id context.
- *
- * Note: threads can be migrated at any point while executing the
- * tracepoint probe. This means the CPU id field (and filter) is only
- * statistical. For instance, even though a user might select a
- * cpu_id==1 filter, there may be few events recorded into the channel
- * appearing from other CPUs, due to migration.
- */
-
-#define _LGPL_SOURCE
-#include <stddef.h>
-#include <sys/types.h>
-#include <unistd.h>
-#include <lttng/ust-events.h>
-#include <lttng/ust-tracer.h>
-#include <lttng/ringbuffer-config.h>
-#include "../libringbuffer/getcpu.h"
-
-static
-size_t cpu_id_get_size(struct lttng_ctx_field *field, size_t offset)
-{
- size_t size = 0;
-
- size += lib_ring_buffer_align(offset, lttng_alignof(int));
- size += sizeof(int);
- return size;
-}
-
-static
-void cpu_id_record(struct lttng_ctx_field *field,
- struct lttng_ust_lib_ring_buffer_ctx *ctx,
- struct lttng_channel *chan)
-{
- int cpu;
-
- cpu = lttng_ust_get_cpu();
- lib_ring_buffer_align_ctx(ctx, lttng_alignof(cpu));
- chan->ops->event_write(ctx, &cpu, sizeof(cpu));
-}
-
-static
-void cpu_id_get_value(struct lttng_ctx_field *field,
- struct lttng_ctx_value *value)
-{
- value->u.s64 = lttng_ust_get_cpu();
-}
-
-int lttng_add_cpu_id_to_ctx(struct lttng_ctx **ctx)
-{
- struct lttng_ctx_field *field;
-
- field = lttng_append_context(ctx);
- if (!field)
- return -ENOMEM;
- if (lttng_find_context(*ctx, "cpu_id")) {
- lttng_remove_context_field(ctx, field);
- return -EEXIST;
- }
- field->event_field.name = "cpu_id";
- field->event_field.type.atype = atype_integer;
- field->event_field.type.u.integer.size = sizeof(int) * CHAR_BIT;
- field->event_field.type.u.integer.alignment = lttng_alignof(int) * CHAR_BIT;
- field->event_field.type.u.integer.signedness = lttng_is_signed_type(int);
- field->event_field.type.u.integer.reverse_byte_order = 0;
- field->event_field.type.u.integer.base = 10;
- field->event_field.type.u.integer.encoding = lttng_encode_none;
- field->get_size = cpu_id_get_size;
- field->record = cpu_id_record;
- field->get_value = cpu_id_get_value;
- lttng_context_update(*ctx);
- return 0;
-}