/*
* ltt-events.c
*
- * Copyright 2010 (c) - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
* Holds LTTng per-session event registry.
*
- * Dual LGPL v2.1/GPL v2 license.
+ * Copyright (C) 2010-2012 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
#include <stdio.h>
-#include <endian.h>
#include <urcu/list.h>
#include <urcu/hlist.h>
#include <pthread.h>
#include <stddef.h>
#include <inttypes.h>
#include <time.h>
-#include <sys/prctl.h>
+#include <lttng/ust-endian.h>
#include "clock.h"
#include <urcu-bp.h>
#include <usterr-signal-safe.h>
#include <helper.h>
#include "error.h"
+#include "compat.h"
#include "tracepoint-internal.h"
#include "ltt-tracer.h"
#include "../libringbuffer/shm.h"
#include "jhash.h"
-#define PROCNAME_LEN 17
-
/*
* The sessions mutex is the centralized mutex across UST tracing
* control and probe registration. All operations within this file are
{
struct cds_hlist_head *head;
struct ust_pending_probe *e;
- size_t name_len = strlen(name);
+ size_t name_len = strlen(name) + 1;
uint32_t hash;
- if (name_len > LTTNG_UST_SYM_NAME_LEN - 1) {
- WARN("Truncating tracepoint name %s which exceeds size limits of %u chars", name, LTTNG_UST_SYM_NAME_LEN - 1);
- name_len = LTTNG_UST_SYM_NAME_LEN - 1;
+ if (name_len > LTTNG_UST_SYM_NAME_LEN) {
+ WARN("Truncating tracepoint name %s which exceeds size limits of %u chars", name, LTTNG_UST_SYM_NAME_LEN);
+ name_len = LTTNG_UST_SYM_NAME_LEN;
}
- hash = jhash(name, name_len, 0);
+ hash = jhash(name, name_len - 1, 0);
head = &pending_probe_table[hash & (PENDING_PROBE_HASH_SIZE - 1)];
e = zmalloc(sizeof(struct ust_pending_probe) + name_len);
if (!e)
return -ENOMEM;
- memcpy(&e->name[0], name, name_len + 1);
- e->name[name_len] = '\0';
+ memcpy(&e->name[0], name, name_len);
+ e->name[name_len - 1] = '\0';
e->loglevel_type = loglevel_type;
e->loglevel = loglevel;
cds_hlist_add_head(&e->node, head);
const char *name = desc->name;
int ret = 0;
struct lttng_ust_event event_param;
- size_t name_len = strlen(name);
+ size_t name_len = strlen(name) + 1;
uint32_t hash;
/* Wildcard */
memcpy(&event_param, &sw->event_param,
sizeof(event_param));
- memcpy(event_param.name,
+ strncpy(event_param.name,
desc->name,
sizeof(event_param.name));
+ event_param.name[sizeof(event_param.name) - 1] = '\0';
/* create event */
ret = ltt_event_create(sw->chan,
&event_param, NULL,
}
}
- if (name_len > LTTNG_UST_SYM_NAME_LEN - 1) {
- WARN("Truncating tracepoint name %s which exceeds size limits of %u chars", name, LTTNG_UST_SYM_NAME_LEN - 1);
- name_len = LTTNG_UST_SYM_NAME_LEN - 1;
+ if (name_len > LTTNG_UST_SYM_NAME_LEN) {
+ WARN("Truncating tracepoint name %s which exceeds size limits of %u chars", name, LTTNG_UST_SYM_NAME_LEN);
+ name_len = LTTNG_UST_SYM_NAME_LEN;
}
- hash = jhash(name, name_len, 0);
+ hash = jhash(name, name_len - 1, 0);
head = &pending_probe_table[hash & (PENDING_PROBE_HASH_SIZE - 1)];
cds_hlist_for_each_entry_safe(e, node, p, head, node) {
struct ltt_event *event;
remove_pending_probe(e);
ret |= __tracepoint_probe_register(name,
event->desc->probe_callback,
- event);
+ event, event->desc->signature);
if (ret)
continue;
event->id = chan->free_event_id++;
* headers. Therefore the "chan" information used as input
* should be already accessible.
*/
- chan = transport->ops.channel_create("[lttng]", buf_addr,
+ chan = transport->ops.channel_create(transport_name, buf_addr,
subbuf_size, num_subbuf, switch_timer_interval,
read_timer_interval, shm_fd, wait_fd,
memory_map_size, chan_priv_init);
*/
int ltt_event_create(struct ltt_channel *chan,
struct lttng_ust_event *event_param,
- void *filter,
+ void (*filter)(struct ltt_event *event),
struct ltt_event **_event)
{
const struct lttng_event_desc *desc = NULL; /* silence gcc */
if (event->desc) {
ret = __tracepoint_probe_register(event_param->name,
event->desc->probe_callback,
- event);
+ event, event->desc->signature);
if (ret)
goto register_error;
event->id = chan->free_event_id++;
return 0;
monotonic[1] = trace_clock_read64();
offset = (monotonic[0] + monotonic[1]) >> 1;
- realtime = rts.tv_sec * 1000000000ULL;
+ realtime = (uint64_t) rts.tv_sec * 1000000000ULL;
realtime += rts.tv_nsec;
offset = realtime - offset;
return offset;
struct ltt_channel *chan;
struct ltt_event *event;
int ret = 0;
- char procname[PROCNAME_LEN] = "";
+ char procname[LTTNG_UST_PROCNAME_LEN] = "";
if (!CMM_ACCESS_ONCE(session->active))
return 0;
goto end;
/* ignore error, just use empty string if error. */
- (void) prctl(PR_GET_NAME, (unsigned long) procname, 0, 0, 0);
- procname[PROCNAME_LEN - 1] = '\0';
+ lttng_ust_getprocname(procname);
+ procname[LTTNG_UST_PROCNAME_LEN - 1] = '\0';
ret = lttng_metadata_printf(session,
"env {\n"
" vpid = %d;\n"
if (!e)
return ERR_PTR(-ENOMEM);
memcpy(&e->name[0], event_param->name, name_len);
+ e->loglevel_type = event_param->loglevel_type;
+ e->loglevel = event_param->loglevel;
cds_list_add(&e->list, &wildcard_list);
CDS_INIT_LIST_HEAD(&e->session_list);
}
wildcard->enabled = 0;
return 0;
}
+
+/*
+ * Take the TLS "fault" in libuuid if dlopen'd, which can take the
+ * dynamic linker mutex, outside of the UST lock, since the UST lock is
+ * taken in constructors, which are called with dynamic linker mutex
+ * held.
+ */
+void lttng_fixup_event_tls(void)
+{
+ unsigned char uuid[37];
+
+ (void) uuid_generate(uuid);
+}
projects / lttng-ust.git / blobdiff