Commit | Line | Data |
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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 |
9af5d97a | 10 | #include <limits.h> |
b4051ad8 | 11 | #include <stddef.h> |
8173ec7c | 12 | #include <pthread.h> |
4318ae1b MD |
13 | #include <lttng/ust-events.h> |
14 | #include <lttng/ust-tracer.h> | |
0466ac28 | 15 | #include <lttng/ringbuffer-context.h> |
8173ec7c | 16 | |
fc80554e MJ |
17 | #include "context-internal.h" |
18 | ||
8173ec7c | 19 | static |
4e48b5d2 | 20 | size_t pthread_id_get_size(void *priv __attribute__((unused)), |
2208d8b5 | 21 | size_t offset) |
8173ec7c MD |
22 | { |
23 | size_t size = 0; | |
24 | ||
dc325c1d | 25 | size += lttng_ust_lib_ring_buffer_align(offset, lttng_ust_rb_alignof(unsigned long)); |
8de38cf7 | 26 | size += sizeof(unsigned long); |
8173ec7c MD |
27 | return size; |
28 | } | |
29 | ||
30 | static | |
4e48b5d2 | 31 | void pthread_id_record(void *priv __attribute__((unused)), |
4cfec15c | 32 | struct lttng_ust_lib_ring_buffer_ctx *ctx, |
e7bc0ef6 | 33 | struct lttng_ust_channel_buffer *chan) |
8173ec7c MD |
34 | { |
35 | unsigned long pthread_id; | |
36 | ||
37 | pthread_id = (unsigned long) pthread_self(); | |
8936b6c0 | 38 | chan->ops->event_write(ctx, &pthread_id, sizeof(pthread_id), lttng_ust_rb_alignof(pthread_id)); |
8173ec7c MD |
39 | } |
40 | ||
77aa5901 | 41 | static |
4e48b5d2 | 42 | void pthread_id_get_value(void *priv __attribute__((unused)), |
daacdbfc | 43 | struct lttng_ust_ctx_value *value) |
77aa5901 | 44 | { |
6e9ac4ae | 45 | value->u.s64 = (unsigned long) pthread_self(); |
77aa5901 MD |
46 | } |
47 | ||
4e48b5d2 MD |
48 | static const struct lttng_ust_ctx_field *ctx_field = lttng_ust_static_ctx_field( |
49 | lttng_ust_static_event_field("pthread_id", | |
50 | lttng_ust_static_type_integer(sizeof(unsigned long) * CHAR_BIT, | |
51 | lttng_ust_rb_alignof(unsigned long) * CHAR_BIT, | |
52 | lttng_ust_is_signed_type(unsigned long), | |
53 | BYTE_ORDER, 10), | |
54 | false, false), | |
55 | pthread_id_get_size, | |
56 | pthread_id_record, | |
57 | pthread_id_get_value, | |
58 | NULL, NULL); | |
59 | ||
daacdbfc | 60 | int lttng_add_pthread_id_to_ctx(struct lttng_ust_ctx **ctx) |
8173ec7c | 61 | { |
a084756d | 62 | int ret; |
8173ec7c | 63 | |
4e48b5d2 | 64 | if (lttng_find_context(*ctx, ctx_field->event_field->name)) { |
a084756d MD |
65 | ret = -EEXIST; |
66 | goto error_find_context; | |
8173ec7c | 67 | } |
4e48b5d2 MD |
68 | ret = lttng_ust_context_append(ctx, ctx_field); |
69 | if (ret) | |
70 | return ret; | |
8173ec7c | 71 | return 0; |
a084756d | 72 | |
a084756d | 73 | error_find_context: |
a084756d | 74 | return ret; |
8173ec7c | 75 | } |