1 /* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1)
7 * Copyright (C) 2009-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
10 #include <linux/module.h>
11 #include <linux/slab.h>
12 #include <linux/sched.h>
13 #include <lttng-events.h>
14 #include <wrapper/ringbuffer/frontend_types.h>
15 #include <wrapper/vmalloc.h>
16 #include <lttng-tracer.h>
19 size_t tid_get_size(size_t offset
)
23 size
+= lib_ring_buffer_align(offset
, lttng_alignof(pid_t
));
24 size
+= sizeof(pid_t
);
29 void tid_record(struct lttng_ctx_field
*field
,
30 struct lib_ring_buffer_ctx
*ctx
,
31 struct lttng_channel
*chan
)
35 tid
= task_pid_nr(current
);
36 lib_ring_buffer_align_ctx(ctx
, lttng_alignof(tid
));
37 chan
->ops
->event_write(ctx
, &tid
, sizeof(tid
));
41 void tid_get_value(struct lttng_ctx_field
*field
,
42 struct lttng_probe_ctx
*lttng_probe_ctx
,
43 union lttng_ctx_value
*value
)
47 tid
= task_pid_nr(current
);
51 int lttng_add_tid_to_ctx(struct lttng_ctx
**ctx
)
53 struct lttng_ctx_field
*field
;
55 field
= lttng_append_context(ctx
);
58 if (lttng_find_context(*ctx
, "tid")) {
59 lttng_remove_context_field(ctx
, field
);
62 field
->event_field
.name
= "tid";
63 field
->event_field
.type
.atype
= atype_integer
;
64 field
->event_field
.type
.u
.basic
.integer
.size
= sizeof(pid_t
) * CHAR_BIT
;
65 field
->event_field
.type
.u
.basic
.integer
.alignment
= lttng_alignof(pid_t
) * CHAR_BIT
;
66 field
->event_field
.type
.u
.basic
.integer
.signedness
= lttng_is_signed_type(pid_t
);
67 field
->event_field
.type
.u
.basic
.integer
.reverse_byte_order
= 0;
68 field
->event_field
.type
.u
.basic
.integer
.base
= 10;
69 field
->event_field
.type
.u
.basic
.integer
.encoding
= lttng_encode_none
;
70 field
->get_size
= tid_get_size
;
71 field
->record
= tid_record
;
72 field
->get_value
= tid_get_value
;
73 lttng_context_update(*ctx
);
74 wrapper_vmalloc_sync_all();
77 EXPORT_SYMBOL_GPL(lttng_add_tid_to_ctx
);
This page took 0.032137 seconds and 4 git commands to generate.