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8173ec7c | 1 | /* |
c0c0989a | 2 | * SPDX-License-Identifier: LGPL-2.1-only |
8173ec7c | 3 | * |
e92f3e28 MD |
4 | * Copyright (C) 2009-2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
5 | * | |
c0c0989a | 6 | * LTTng UST pthread_id context. |
8173ec7c MD |
7 | */ |
8 | ||
3fbec7dc | 9 | #define _LGPL_SOURCE |
b4051ad8 | 10 | #include <stddef.h> |
8173ec7c | 11 | #include <pthread.h> |
4318ae1b MD |
12 | #include <lttng/ust-events.h> |
13 | #include <lttng/ust-tracer.h> | |
14 | #include <lttng/ringbuffer-config.h> | |
8173ec7c MD |
15 | |
16 | static | |
53569322 | 17 | size_t pthread_id_get_size(struct lttng_ctx_field *field, size_t offset) |
8173ec7c MD |
18 | { |
19 | size_t size = 0; | |
20 | ||
8de38cf7 MD |
21 | size += lib_ring_buffer_align(offset, lttng_alignof(unsigned long)); |
22 | size += sizeof(unsigned long); | |
8173ec7c MD |
23 | return size; |
24 | } | |
25 | ||
26 | static | |
27 | void pthread_id_record(struct lttng_ctx_field *field, | |
4cfec15c | 28 | struct lttng_ust_lib_ring_buffer_ctx *ctx, |
7dd08bec | 29 | struct lttng_channel *chan) |
8173ec7c MD |
30 | { |
31 | unsigned long pthread_id; | |
32 | ||
33 | pthread_id = (unsigned long) pthread_self(); | |
34 | lib_ring_buffer_align_ctx(ctx, lttng_alignof(pthread_id)); | |
35 | chan->ops->event_write(ctx, &pthread_id, sizeof(pthread_id)); | |
36 | } | |
37 | ||
77aa5901 MD |
38 | static |
39 | void pthread_id_get_value(struct lttng_ctx_field *field, | |
53569322 | 40 | struct lttng_ctx_value *value) |
77aa5901 | 41 | { |
6e9ac4ae | 42 | value->u.s64 = (unsigned long) pthread_self(); |
77aa5901 MD |
43 | } |
44 | ||
8173ec7c MD |
45 | int lttng_add_pthread_id_to_ctx(struct lttng_ctx **ctx) |
46 | { | |
47 | struct lttng_ctx_field *field; | |
48 | ||
49 | field = lttng_append_context(ctx); | |
50 | if (!field) | |
51 | return -ENOMEM; | |
52 | if (lttng_find_context(*ctx, "pthread_id")) { | |
53 | lttng_remove_context_field(ctx, field); | |
54 | return -EEXIST; | |
55 | } | |
56 | field->event_field.name = "pthread_id"; | |
57 | field->event_field.type.atype = atype_integer; | |
218deb69 MD |
58 | field->event_field.type.u.integer.size = sizeof(unsigned long) * CHAR_BIT; |
59 | field->event_field.type.u.integer.alignment = lttng_alignof(unsigned long) * CHAR_BIT; | |
60 | field->event_field.type.u.integer.signedness = lttng_is_signed_type(unsigned long); | |
61 | field->event_field.type.u.integer.reverse_byte_order = 0; | |
62 | field->event_field.type.u.integer.base = 10; | |
63 | field->event_field.type.u.integer.encoding = lttng_encode_none; | |
8173ec7c MD |
64 | field->get_size = pthread_id_get_size; |
65 | field->record = pthread_id_record; | |
77aa5901 | 66 | field->get_value = pthread_id_get_value; |
b2cc986a | 67 | lttng_context_update(*ctx); |
8173ec7c MD |
68 | return 0; |
69 | } |