2 * Copyright 2016 - Philippe Proulx <pproulx@efficios.com>
3 * Copyright 2016 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
4 * Copyright 2010-2011 - EfficiOS Inc. and Linux Foundation
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
32 #include <babeltrace/ctf-ir/stream.h>
33 #include <babeltrace/plugin/notification/iterator.h>
36 #include "../common/notif-iter/notif-iter.h"
38 #include "data-stream.h"
40 #define PRINT_ERR_STREAM ctf_fs->error_fp
41 #define PRINT_PREFIX "ctf-fs-data-stream"
45 size_t remaining_mmap_bytes(struct ctf_fs_stream
*stream
)
47 return stream
->mmap_valid_len
- stream
->request_offset
;
51 int stream_munmap(struct ctf_fs_stream
*stream
)
54 struct ctf_fs_component
*ctf_fs
= stream
->file
->ctf_fs
;
56 if (munmap(stream
->mmap_addr
, stream
->mmap_len
)) {
57 PERR("Cannot memory-unmap address %p (size %zu) of file \"%s\" (%p): %s\n",
58 stream
->mmap_addr
, stream
->mmap_len
,
59 stream
->file
->path
->str
, stream
->file
->fp
,
69 int mmap_next(struct ctf_fs_stream
*stream
)
72 struct ctf_fs_component
*ctf_fs
= stream
->file
->ctf_fs
;
74 /* Unmap old region */
75 if (stream
->mmap_addr
) {
76 if (stream_munmap(stream
)) {
80 stream
->mmap_offset
+= stream
->mmap_valid_len
;
81 stream
->request_offset
= 0;
84 stream
->mmap_valid_len
= MIN(stream
->file
->size
- stream
->mmap_offset
,
85 stream
->mmap_max_len
);
86 /* Round up to next page, assuming page size being a power of 2. */
87 stream
->mmap_len
= (stream
->mmap_valid_len
+ ctf_fs
->page_size
- 1)
88 & ~(ctf_fs
->page_size
- 1);
90 stream
->mmap_addr
= mmap((void *) 0, stream
->mmap_len
,
91 PROT_READ
, MAP_PRIVATE
, fileno(stream
->file
->fp
),
93 if (stream
->mmap_addr
== MAP_FAILED
) {
94 PERR("Cannot memory-map address (size %zu) of file \"%s\" (%p) at offset %zu: %s\n",
95 stream
->mmap_len
, stream
->file
->path
->str
,
96 stream
->file
->fp
, stream
->mmap_offset
,
103 stream_munmap(stream
);
110 enum bt_ctf_notif_iter_medium_status
medop_request_bytes(
111 size_t request_sz
, uint8_t **buffer_addr
,
112 size_t *buffer_sz
, void *data
)
114 enum bt_ctf_notif_iter_medium_status status
=
115 BT_CTF_NOTIF_ITER_MEDIUM_STATUS_OK
;
116 struct ctf_fs_stream
*stream
= data
;
117 struct ctf_fs_component
*ctf_fs
= stream
->file
->ctf_fs
;
119 if (request_sz
== 0) {
123 /* Check if we have at least one memory-mapped byte left */
124 if (remaining_mmap_bytes(stream
) == 0) {
125 /* Are we at the end of the file? */
126 if (stream
->request_offset
>= stream
->file
->size
) {
127 PDBG("Reached end of file \"%s\" (%p)\n",
128 stream
->file
->path
->str
, stream
->file
->fp
);
129 status
= BT_CTF_NOTIF_ITER_MEDIUM_STATUS_EOF
;
133 if (mmap_next(stream
)) {
134 PERR("Cannot memory-map next region of file \"%s\" (%p)\n",
135 stream
->file
->path
->str
, stream
->file
->fp
);
140 *buffer_sz
= MIN(remaining_mmap_bytes(stream
), request_sz
);
141 *buffer_addr
= ((uint8_t *) stream
->mmap_addr
) + stream
->request_offset
;
142 stream
->request_offset
+= *buffer_sz
;
146 status
= BT_CTF_NOTIF_ITER_MEDIUM_STATUS_ERROR
;
153 struct bt_ctf_stream
*medop_get_stream(
154 struct bt_ctf_stream_class
*stream_class
, void *data
)
156 struct ctf_fs_stream
*fs_stream
= data
;
157 struct ctf_fs_component
*ctf_fs
= fs_stream
->file
->ctf_fs
;
159 if (!fs_stream
->stream
) {
160 int64_t id
= bt_ctf_stream_class_get_id(stream_class
);
162 PDBG("Creating stream out of stream class %" PRId64
"\n", id
);
163 fs_stream
->stream
= bt_ctf_stream_create(stream_class
,
164 fs_stream
->file
->path
->str
);
165 if (!fs_stream
->stream
) {
166 PERR("Cannot create stream (stream class %" PRId64
")\n",
171 return fs_stream
->stream
;
174 static struct bt_ctf_notif_iter_medium_ops medops
= {
175 .request_bytes
= medop_request_bytes
,
176 .get_stream
= medop_get_stream
,
180 struct ctf_fs_stream
*ctf_fs_stream_create(
181 struct ctf_fs_component
*ctf_fs
, struct ctf_fs_file
*file
)
183 struct ctf_fs_stream
*stream
= g_new0(struct ctf_fs_stream
, 1);
190 stream
->notif_iter
= bt_ctf_notif_iter_create(ctf_fs
->metadata
->trace
,
191 ctf_fs
->page_size
, medops
, stream
, ctf_fs
->error_fp
);
192 if (!stream
->notif_iter
) {
196 stream
->mmap_max_len
= ctf_fs
->page_size
* 2048;
199 /* Do not touch "borrowed" file. */
201 ctf_fs_stream_destroy(stream
);
208 void ctf_fs_stream_destroy(struct ctf_fs_stream
*stream
)
215 ctf_fs_file_destroy(stream
->file
);
218 if (stream
->stream
) {
219 BT_PUT(stream
->stream
);
222 if (stream
->notif_iter
) {
223 bt_ctf_notif_iter_destroy(stream
->notif_iter
);