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96f85541 | 1 | /* |
c0c0989a | 2 | * SPDX-License-Identifier: LGPL-2.1-only |
96f85541 MD |
3 | * |
4 | * Copyright (C) 2009-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
5 | * | |
c0c0989a | 6 | * LTTng UST Instruction Pointer Context. |
96f85541 MD |
7 | */ |
8 | ||
3fbec7dc | 9 | #define _LGPL_SOURCE |
b4051ad8 | 10 | #include <stddef.h> |
96f85541 MD |
11 | #include <sys/types.h> |
12 | #include <unistd.h> | |
13 | #include <lttng/ust-events.h> | |
14 | #include <lttng/ust-tracer.h> | |
15 | #include <lttng/ringbuffer-config.h> | |
16 | ||
17 | static | |
53569322 | 18 | size_t ip_get_size(struct lttng_ctx_field *field, size_t offset) |
96f85541 MD |
19 | { |
20 | size_t size = 0; | |
21 | ||
22 | size += lib_ring_buffer_align(offset, lttng_alignof(void *)); | |
23 | size += sizeof(void *); | |
24 | return size; | |
25 | } | |
26 | ||
27 | static | |
28 | void ip_record(struct lttng_ctx_field *field, | |
29 | struct lttng_ust_lib_ring_buffer_ctx *ctx, | |
30 | struct lttng_channel *chan) | |
31 | { | |
32 | void *ip; | |
33 | ||
34 | ip = ctx->ip; | |
35 | lib_ring_buffer_align_ctx(ctx, lttng_alignof(ip)); | |
36 | chan->ops->event_write(ctx, &ip, sizeof(ip)); | |
37 | } | |
38 | ||
39 | int lttng_add_ip_to_ctx(struct lttng_ctx **ctx) | |
40 | { | |
41 | struct lttng_ctx_field *field; | |
42 | ||
43 | field = lttng_append_context(ctx); | |
44 | if (!field) | |
45 | return -ENOMEM; | |
46 | if (lttng_find_context(*ctx, "ip")) { | |
47 | lttng_remove_context_field(ctx, field); | |
48 | return -EEXIST; | |
49 | } | |
50 | field->event_field.name = "ip"; | |
51 | field->event_field.type.atype = atype_integer; | |
218deb69 MD |
52 | field->event_field.type.u.integer.size = sizeof(void *) * CHAR_BIT; |
53 | field->event_field.type.u.integer.alignment = lttng_alignof(void *) * CHAR_BIT; | |
54 | field->event_field.type.u.integer.signedness = lttng_is_signed_type(void *); | |
55 | field->event_field.type.u.integer.reverse_byte_order = 0; | |
56 | field->event_field.type.u.integer.base = 16; | |
57 | field->event_field.type.u.integer.encoding = lttng_encode_none; | |
96f85541 MD |
58 | field->get_size = ip_get_size; |
59 | field->record = ip_record; | |
b2cc986a | 60 | lttng_context_update(*ctx); |
96f85541 MD |
61 | return 0; |
62 | } |