Commit | Line | Data |
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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 |
9af5d97a | 10 | #include <limits.h> |
b4051ad8 | 11 | #include <stddef.h> |
96f85541 MD |
12 | #include <sys/types.h> |
13 | #include <unistd.h> | |
14 | #include <lttng/ust-events.h> | |
15 | #include <lttng/ust-tracer.h> | |
0b4b8811 | 16 | #include <lttng/ust-ringbuffer-context.h> |
96f85541 | 17 | |
fc80554e MJ |
18 | #include "context-internal.h" |
19 | ||
96f85541 | 20 | static |
4e48b5d2 | 21 | size_t ip_get_size(void *priv __attribute__((unused)), |
b2e37d27 | 22 | struct lttng_ust_probe_ctx *probe_ctx __attribute__((unused)), |
2208d8b5 | 23 | size_t offset) |
96f85541 MD |
24 | { |
25 | size_t size = 0; | |
26 | ||
b5457df5 | 27 | size += lttng_ust_ring_buffer_align(offset, lttng_ust_rb_alignof(void *)); |
96f85541 MD |
28 | size += sizeof(void *); |
29 | return size; | |
30 | } | |
31 | ||
32 | static | |
4e48b5d2 | 33 | void ip_record(void *priv __attribute__((unused)), |
b2e37d27 MD |
34 | struct lttng_ust_probe_ctx *probe_ctx, |
35 | struct lttng_ust_ring_buffer_ctx *ctx, | |
36 | struct lttng_ust_channel_buffer *chan) | |
96f85541 MD |
37 | { |
38 | void *ip; | |
39 | ||
b2e37d27 | 40 | ip = probe_ctx->ip; |
8936b6c0 | 41 | chan->ops->event_write(ctx, &ip, sizeof(ip), lttng_ust_rb_alignof(ip)); |
96f85541 MD |
42 | } |
43 | ||
b2e37d27 MD |
44 | static |
45 | void ip_get_value(void *priv __attribute__((unused)), | |
46 | struct lttng_ust_probe_ctx *probe_ctx, | |
47 | struct lttng_ust_ctx_value *value) | |
48 | { | |
49 | value->u.u64 = (unsigned long) probe_ctx->ip; | |
50 | } | |
51 | ||
4e48b5d2 MD |
52 | static const struct lttng_ust_ctx_field *ctx_field = lttng_ust_static_ctx_field( |
53 | lttng_ust_static_event_field("ip", | |
54 | lttng_ust_static_type_integer(sizeof(void *) * CHAR_BIT, | |
55 | lttng_ust_rb_alignof(void *) * CHAR_BIT, | |
56 | lttng_ust_is_signed_type(void *), | |
7d1077f8 | 57 | LTTNG_UST_BYTE_ORDER, 16), |
4e48b5d2 MD |
58 | false, false), |
59 | ip_get_size, | |
60 | ip_record, | |
b2e37d27 MD |
61 | ip_get_value, |
62 | NULL, NULL); | |
4e48b5d2 | 63 | |
daacdbfc | 64 | int lttng_add_ip_to_ctx(struct lttng_ust_ctx **ctx) |
96f85541 | 65 | { |
a084756d | 66 | int ret; |
96f85541 | 67 | |
4e48b5d2 | 68 | if (lttng_find_context(*ctx, ctx_field->event_field->name)) { |
a084756d MD |
69 | ret = -EEXIST; |
70 | goto error_find_context; | |
96f85541 | 71 | } |
4e48b5d2 MD |
72 | ret = lttng_ust_context_append(ctx, ctx_field); |
73 | if (ret) | |
74 | return ret; | |
96f85541 | 75 | return 0; |
a084756d | 76 | |
a084756d | 77 | error_find_context: |
a084756d | 78 | return ret; |
96f85541 | 79 | } |