/*
- * ring_buffer_backend.c
+ * SPDX-License-Identifier: LGPL-2.1-only
*
* Copyright (C) 2005-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; only
- * version 2.1 of the License.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
-#define _GNU_SOURCE
+#define _LGPL_SOURCE
+#include <stddef.h>
+#include <stdint.h>
#include <unistd.h>
#include <urcu/arch.h>
#include <limits.h>
+#include <lttng/align.h>
#include <lttng/ringbuffer-config.h>
#include "vatomic.h"
#include "backend.h"
if (extra_reader_sb)
num_subbuf_alloc++;
- page_size = sysconf(_SC_PAGE_SIZE);
+ page_size = LTTNG_UST_PAGE_SIZE;
if (page_size <= 0) {
goto page_size_error;
}
bufb->buf_rsb.id = subbuffer_id(config, 0, 1, 0);
/* Allocate subbuffer packet counter table */
- align_shm(shmobj, __alignof__(struct lttng_ust_lib_ring_buffer_backend_subbuffer));
+ align_shm(shmobj, __alignof__(struct lttng_ust_lib_ring_buffer_backend_counts));
set_shmp(bufb->buf_cnt, zalloc_shm(shmobj,
sizeof(struct lttng_ust_lib_ring_buffer_backend_counts)
* num_subbuf));
chanb = &shmp(handle, bufb->chan)->backend;
if (!chanb)
- abort();
+ return;
config = &chanb->config;
num_subbuf_alloc = chanb->num_subbuf;
sb = shmp_index(handle, bufb->buf_wsb, i);
if (!sb)
- abort();
+ return;
sb->id = subbuffer_id(config, 0, 1, i);
}
if (chanb->extra_reader_sb)
sbp = shmp_index(handle, bufb->array, i);
if (!sbp)
- abort();
+ return;
pages = shmp(handle, sbp->shmp);
if (!pages)
- abort();
+ return;
/* Don't reset mmap_offset */
v_set(config, &pages->records_commit, 0);
v_set(config, &pages->records_unread, 0);
if (!name)
return -EPERM;
- page_size = sysconf(_SC_PAGE_SIZE);
+ page_size = LTTNG_UST_PAGE_SIZE;
if (page_size <= 0) {
return -ENOMEM;
}
memcpy(&chanb->config, config, sizeof(*config));
/* Per-cpu buffer size: control (prior to backend) */
- shmsize = offset_align(shmsize, __alignof__(struct lttng_ust_lib_ring_buffer));
+ shmsize = lttng_ust_offset_align(shmsize, __alignof__(struct lttng_ust_lib_ring_buffer));
shmsize += sizeof(struct lttng_ust_lib_ring_buffer);
+ shmsize += lttng_ust_offset_align(shmsize, __alignof__(struct commit_counters_hot));
+ shmsize += sizeof(struct commit_counters_hot) * num_subbuf;
+ shmsize += lttng_ust_offset_align(shmsize, __alignof__(struct commit_counters_cold));
+ shmsize += sizeof(struct commit_counters_cold) * num_subbuf;
+ /* Sampled timestamp end */
+ shmsize += lttng_ust_offset_align(shmsize, __alignof__(uint64_t));
+ shmsize += sizeof(uint64_t) * num_subbuf;
/* Per-cpu buffer size: backend */
/* num_subbuf + 1 is the worse case */
num_subbuf_alloc = num_subbuf + 1;
- shmsize += offset_align(shmsize, __alignof__(struct lttng_ust_lib_ring_buffer_backend_pages_shmp));
+ shmsize += lttng_ust_offset_align(shmsize, __alignof__(struct lttng_ust_lib_ring_buffer_backend_pages_shmp));
shmsize += sizeof(struct lttng_ust_lib_ring_buffer_backend_pages_shmp) * num_subbuf_alloc;
- shmsize += offset_align(shmsize, page_size);
+ shmsize += lttng_ust_offset_align(shmsize, page_size);
shmsize += subbuf_size * num_subbuf_alloc;
- shmsize += offset_align(shmsize, __alignof__(struct lttng_ust_lib_ring_buffer_backend_pages));
+ shmsize += lttng_ust_offset_align(shmsize, __alignof__(struct lttng_ust_lib_ring_buffer_backend_pages));
shmsize += sizeof(struct lttng_ust_lib_ring_buffer_backend_pages) * num_subbuf_alloc;
- shmsize += offset_align(shmsize, __alignof__(struct lttng_ust_lib_ring_buffer_backend_subbuffer));
+ shmsize += lttng_ust_offset_align(shmsize, __alignof__(struct lttng_ust_lib_ring_buffer_backend_subbuffer));
shmsize += sizeof(struct lttng_ust_lib_ring_buffer_backend_subbuffer) * num_subbuf;
- /* Per-cpu buffer size: control (after backend) */
- shmsize += offset_align(shmsize, __alignof__(struct commit_counters_hot));
- shmsize += sizeof(struct commit_counters_hot) * num_subbuf;
- shmsize += offset_align(shmsize, __alignof__(struct commit_counters_cold));
- shmsize += sizeof(struct commit_counters_cold) * num_subbuf;
+ shmsize += lttng_ust_offset_align(shmsize, __alignof__(struct lttng_ust_lib_ring_buffer_backend_counts));
+ shmsize += sizeof(struct lttng_ust_lib_ring_buffer_backend_counts) * num_subbuf;
if (config->alloc == RING_BUFFER_ALLOC_PER_CPU) {
struct lttng_ust_lib_ring_buffer *buf;
struct shm_object *shmobj;
shmobj = shm_object_table_alloc(handle->table, shmsize,
- SHM_OBJECT_SHM, stream_fds[i]);
+ SHM_OBJECT_SHM, stream_fds[i], i);
if (!shmobj)
goto end;
align_shm(shmobj, __alignof__(struct lttng_ust_lib_ring_buffer));
struct lttng_ust_lib_ring_buffer *buf;
shmobj = shm_object_table_alloc(handle->table, shmsize,
- SHM_OBJECT_SHM, stream_fds[0]);
+ SHM_OBJECT_SHM, stream_fds[0], -1);
if (!shmobj)
goto end;
align_shm(shmobj, __alignof__(struct lttng_ust_lib_ring_buffer));
const struct lttng_ust_lib_ring_buffer_config *config;
ssize_t orig_len;
struct lttng_ust_lib_ring_buffer_backend_pages_shmp *rpages;
+ struct lttng_ust_lib_ring_buffer_backend_pages *backend_pages;
unsigned long sb_bindex, id;
void *src;
id = bufb->buf_rsb.id;
sb_bindex = subbuffer_id_get_index(config, id);
rpages = shmp_index(handle, bufb->array, sb_bindex);
+ if (!rpages)
+ return 0;
/*
* Underlying layer should never ask for reads across
* subbuffers.
CHAN_WARN_ON(chanb, offset >= chanb->buf_size);
CHAN_WARN_ON(chanb, config->mode == RING_BUFFER_OVERWRITE
&& subbuffer_id_is_noref(config, id));
- src = shmp_index(handle, shmp(handle, rpages->shmp)->p,
- offset & (chanb->subbuf_size - 1));
+ backend_pages = shmp(handle, rpages->shmp);
+ if (!backend_pages)
+ return 0;
+ src = shmp_index(handle, backend_pages->p, offset & (chanb->subbuf_size - 1));
if (caa_unlikely(!src))
return 0;
memcpy(dest, src, len);
ssize_t string_len, orig_offset;
char *str;
struct lttng_ust_lib_ring_buffer_backend_pages_shmp *rpages;
+ struct lttng_ust_lib_ring_buffer_backend_pages *backend_pages;
unsigned long sb_bindex, id;
chanb = &shmp(handle, bufb->chan)->backend;
id = bufb->buf_rsb.id;
sb_bindex = subbuffer_id_get_index(config, id);
rpages = shmp_index(handle, bufb->array, sb_bindex);
+ if (!rpages)
+ return -EINVAL;
/*
* Underlying layer should never ask for reads across
* subbuffers.
CHAN_WARN_ON(chanb, offset >= chanb->buf_size);
CHAN_WARN_ON(chanb, config->mode == RING_BUFFER_OVERWRITE
&& subbuffer_id_is_noref(config, id));
- str = shmp_index(handle, shmp(handle, rpages->shmp)->p, offset & (chanb->subbuf_size - 1));
+ backend_pages = shmp(handle, rpages->shmp);
+ if (!backend_pages)
+ return -EINVAL;
+ str = shmp_index(handle, backend_pages->p, offset & (chanb->subbuf_size - 1));
if (caa_unlikely(!str))
return -EINVAL;
string_len = strnlen(str, len);
struct lttng_ust_shm_handle *handle)
{
struct lttng_ust_lib_ring_buffer_backend_pages_shmp *rpages;
+ struct lttng_ust_lib_ring_buffer_backend_pages *backend_pages;
struct channel_backend *chanb;
const struct lttng_ust_lib_ring_buffer_config *config;
unsigned long sb_bindex, id;
id = bufb->buf_rsb.id;
sb_bindex = subbuffer_id_get_index(config, id);
rpages = shmp_index(handle, bufb->array, sb_bindex);
+ if (!rpages)
+ return NULL;
CHAN_WARN_ON(chanb, config->mode == RING_BUFFER_OVERWRITE
&& subbuffer_id_is_noref(config, id));
- return shmp_index(handle, shmp(handle, rpages->shmp)->p, offset & (chanb->subbuf_size - 1));
+ backend_pages = shmp(handle, rpages->shmp);
+ if (!backend_pages)
+ return NULL;
+ return shmp_index(handle, backend_pages->p, offset & (chanb->subbuf_size - 1));
}
/**
{
size_t sbidx;
struct lttng_ust_lib_ring_buffer_backend_pages_shmp *rpages;
+ struct lttng_ust_lib_ring_buffer_backend_pages *backend_pages;
struct channel_backend *chanb;
const struct lttng_ust_lib_ring_buffer_config *config;
unsigned long sb_bindex, id;
id = sb->id;
sb_bindex = subbuffer_id_get_index(config, id);
rpages = shmp_index(handle, bufb->array, sb_bindex);
+ if (!rpages)
+ return NULL;
CHAN_WARN_ON(chanb, config->mode == RING_BUFFER_OVERWRITE
&& subbuffer_id_is_noref(config, id));
- return shmp_index(handle, shmp(handle, rpages->shmp)->p, offset & (chanb->subbuf_size - 1));
+ backend_pages = shmp(handle, rpages->shmp);
+ if (!backend_pages)
+ return NULL;
+ return shmp_index(handle, backend_pages->p, offset & (chanb->subbuf_size - 1));
}
projects / lttng-ust.git / blobdiff