/*
* 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 <sys/ipc.h>
#include <stdint.h>
#include <stddef.h>
+#include <inttypes.h>
+#include <time.h>
+#include <sys/prctl.h>
+#include "clock.h"
#include <urcu-bp.h>
#include <urcu/compiler.h>
#include <helper.h>
#include "error.h"
+#include "tracepoint-internal.h"
#include "ltt-tracer.h"
#include "ltt-tracer-core.h"
#include "wait.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
static CDS_LIST_HEAD(sessions);
+/*
+ * Wildcard list, containing the active wildcards.
+ * Protected by ust lock.
+ */
+static CDS_LIST_HEAD(wildcard_list);
+
/*
* Pending probes hash table, containing the registered ltt events for
* which tracepoint probes are still missing. Protected by the sessions
struct ust_pending_probe {
struct ltt_event *event;
struct cds_hlist_node node;
+ enum lttng_ust_loglevel_type loglevel_type;
+ int loglevel;
char name[];
};
static void _ltt_event_destroy(struct ltt_event *event);
-static void _ltt_loglevel_destroy(struct session_loglevel *sl);
+static void _ltt_wildcard_destroy(struct session_wildcard *sw);
static void _ltt_channel_destroy(struct ltt_channel *chan);
static int _ltt_event_unregister(struct ltt_event *event);
static
static
int _ltt_session_metadata_statedump(struct ltt_session *session);
+int ltt_loglevel_match(const struct lttng_event_desc *desc,
+ enum lttng_ust_loglevel_type req_type,
+ int req_loglevel)
+{
+ int ev_loglevel;
+
+ if (req_type == LTTNG_UST_LOGLEVEL_ALL)
+ return 1;
+ if (!desc->loglevel)
+ ev_loglevel = TRACE_DEFAULT;
+ else
+ ev_loglevel = *(*desc->loglevel);
+ switch (req_type) {
+ case LTTNG_UST_LOGLEVEL_RANGE:
+ if (ev_loglevel <= req_loglevel || req_loglevel == -1)
+ return 1;
+ else
+ return 0;
+ case LTTNG_UST_LOGLEVEL_SINGLE:
+ if (ev_loglevel == req_loglevel || req_loglevel == -1)
+ return 1;
+ else
+ return 0;
+ case LTTNG_UST_LOGLEVEL_ALL:
+ default:
+ return 1;
+ }
+}
+
+/*
+ * Return wildcard for a given event name if the event name match the
+ * one of the wildcards.
+ * Must be called with ust lock held.
+ * Returns NULL if not present.
+ */
+static
+struct wildcard_entry *match_wildcard(const struct lttng_event_desc *desc)
+{
+ struct wildcard_entry *e;
+
+ cds_list_for_each_entry(e, &wildcard_list, list) {
+ /* If only contain '*' */
+ if (strlen(e->name) == 1)
+ goto possible_match;
+ /* Compare excluding final '*' */
+ if (!strncmp(desc->name, e->name, strlen(e->name) - 1))
+ goto possible_match;
+ continue; /* goto next, no match */
+ possible_match:
+ if (ltt_loglevel_match(desc,
+ e->loglevel_type,
+ e->loglevel)) {
+ return e;
+ }
+ /* no match, loop to next */
+ }
+ return NULL;
+}
+
/*
* called at event creation if probe is missing.
* called with session mutex held.
*/
static
-int add_pending_probe(struct ltt_event *event, const char *name)
+int add_pending_probe(struct ltt_event *event, const char *name,
+ enum lttng_ust_loglevel_type loglevel_type,
+ int loglevel)
{
struct cds_hlist_head *head;
struct ust_pending_probe *e;
size_t name_len = strlen(name) + 1;
- uint32_t hash = jhash(name, name_len - 1, 0);
+ uint32_t hash;
+ 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 - 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);
+ e->name[name_len - 1] = '\0';
+ e->loglevel_type = loglevel_type;
+ e->loglevel = loglevel;
cds_hlist_add_head(&e->node, head);
e->event = event;
event->pending_probe = e;
struct cds_hlist_node *node, *p;
struct ust_pending_probe *e;
const char *name = desc->name;
- size_t name_len = strlen(name) + 1;
- uint32_t hash = jhash(name, name_len - 1, 0);
int ret = 0;
+ struct lttng_ust_event event_param;
+ size_t name_len = strlen(name) + 1;
+ uint32_t hash;
- /*
- * For this event, we need to lookup the loglevel. If active (in
- * the active loglevels hash table), we must create the event.
- */
- if (desc->loglevel) {
- const struct tracepoint_loglevel_entry *ev_ll;
- struct loglevel_entry *loglevel;
+ /* Wildcard */
+ {
+ struct wildcard_entry *wildcard;
- ev_ll = *desc->loglevel;
- loglevel = get_loglevel(ev_ll->identifier);
- if (loglevel) {
- struct session_loglevel *sl;
+ wildcard = match_wildcard(desc);
+ if (strcmp(desc->name, "lttng_ust:metadata") && wildcard) {
+ struct session_wildcard *sw;
- cds_list_for_each_entry(sl, &loglevel->session_list,
+ cds_list_for_each_entry(sw, &wildcard->session_list,
session_list) {
struct ltt_event *ev;
int ret;
+ memcpy(&event_param, &sw->event_param,
+ sizeof(event_param));
+ memcpy(event_param.name,
+ desc->name,
+ sizeof(event_param.name));
/* create event */
- ret = ltt_event_create(sl->chan,
- &sl->event_param, NULL,
+ ret = ltt_event_create(sw->chan,
+ &event_param, NULL,
&ev);
- /*
- * TODO: report error.
- */
- if (ret)
+ if (ret) {
+ DBG("Error creating event");
continue;
- cds_list_add(&ev->loglevel_list,
- &sl->events);
+ }
+ cds_list_add(&ev->wildcard_list,
+ &sw->events);
}
}
}
+ 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 - 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;
struct ltt_channel *chan;
- if (strcmp(name, e->name))
+ if (!ltt_loglevel_match(desc,
+ e->loglevel_type,
+ e->loglevel)) {
+ continue;
+ }
+ if (strncmp(name, e->name, LTTNG_UST_SYM_NAME_LEN - 1)) {
continue;
+ }
event = e->event;
chan = event->chan;
assert(!event->desc);
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++;
return NULL;
CDS_INIT_LIST_HEAD(&session->chan);
CDS_INIT_LIST_HEAD(&session->events);
- CDS_INIT_LIST_HEAD(&session->loglevels);
+ CDS_INIT_LIST_HEAD(&session->wildcards);
uuid_generate(session->uuid);
cds_list_add(&session->list, &sessions);
return session;
{
struct ltt_channel *chan, *tmpchan;
struct ltt_event *event, *tmpevent;
- struct session_loglevel *loglevel, *tmploglevel;
+ struct session_wildcard *wildcard, *tmpwildcard;
int ret;
CMM_ACCESS_ONCE(session->active) = 0;
WARN_ON(ret);
}
synchronize_trace(); /* Wait for in-flight events to complete */
- cds_list_for_each_entry_safe(loglevel, tmploglevel, &session->loglevels, list)
- _ltt_loglevel_destroy(loglevel);
+ cds_list_for_each_entry_safe(wildcard, tmpwildcard, &session->wildcards, list)
+ _ltt_wildcard_destroy(wildcard);
cds_list_for_each_entry_safe(event, tmpevent, &session->events, list)
_ltt_event_destroy(event);
cds_list_for_each_entry_safe(chan, tmpchan, &session->chan, list)
size_t subbuf_size, size_t num_subbuf,
unsigned int switch_timer_interval,
unsigned int read_timer_interval,
- int *shm_fd, int *wait_fd,
- uint64_t *memory_map_size,
+ int **shm_fd, int **wait_fd,
+ uint64_t **memory_map_size,
struct ltt_channel *chan_priv_init)
{
struct ltt_channel *chan = NULL;
* 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);
chan->ops->channel_destroy(chan);
}
-int ltt_loglevel_create(struct ltt_channel *chan,
- struct lttng_ust_event *event_param,
- struct session_loglevel **_sl)
-{
- struct session_loglevel *sl;
-
- sl = add_loglevel(event_param->name, chan, event_param);
- if (!sl || IS_ERR(sl)) {
- return PTR_ERR(sl);
- }
- *_sl = sl;
- return 0;
-}
-
-static
-void _ltt_loglevel_destroy(struct session_loglevel *sl)
-{
- _remove_loglevel(sl);
-}
-
/*
* Supports event creation while tracing session is active.
*/
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 */
struct ltt_event *event;
int ret = 0;
- if (chan->used_event_id == -1UL) {
+ if (chan->used_event_id == -1U) {
ret = -ENOMEM;
goto full;
}
* creation). Might require a hash if we have lots of events.
*/
cds_list_for_each_entry(event, &chan->session->events, list) {
- if (event->desc && !strcmp(event->desc->name, event_param->name)) {
+ if (event->desc && !strncmp(event->desc->name,
+ event_param->name,
+ LTTNG_UST_SYM_NAME_LEN - 1)) {
ret = -EEXIST;
goto exist;
}
}
+
+ /*
+ * Check if loglevel match. Refuse to connect event if not.
+ */
+ if (event_param->instrumentation == LTTNG_UST_TRACEPOINT) {
+ desc = ltt_event_get(event_param->name);
+ if (desc) {
+ if (!ltt_loglevel_match(desc,
+ event_param->loglevel_type,
+ event_param->loglevel)) {
+ ret = -EPERM;
+ goto no_loglevel_match;
+ }
+ }
+ /*
+ * If descriptor is not there, it will be added to
+ * pending probes.
+ */
+ }
event = zmalloc(sizeof(struct ltt_event));
if (!event) {
ret = -ENOMEM;
cmm_smp_wmb();
switch (event_param->instrumentation) {
case LTTNG_UST_TRACEPOINT:
- event->desc = ltt_event_get(event_param->name);
+ event->desc = desc;
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++;
* waiting for the probe to register, and the event->id
* stays unallocated.
*/
- ret = add_pending_probe(event, event_param->name);
+ ret = add_pending_probe(event, event_param->name,
+ event_param->loglevel_type,
+ event_param->loglevel);
if (ret)
goto add_pending_error;
}
break;
- case LTTNG_UST_TRACEPOINT_LOGLEVEL:
- assert(0);
- break;
default:
WARN_ON_ONCE(1);
}
register_error:
free(event);
cache_error:
+no_loglevel_match:
exist:
full:
return ret;
struct ltt_event *event)
{
int ret = 0;
+ int loglevel = TRACE_DEFAULT;
if (event->metadata_dumped || !CMM_ACCESS_ONCE(session->active))
return 0;
if (ret)
goto end;
+ if (event->desc->loglevel)
+ loglevel = *(*event->desc->loglevel);
+
+ ret = lttng_metadata_printf(session,
+ " loglevel = %d;\n",
+ loglevel);
+ if (ret)
+ goto end;
+
if (event->ctx) {
ret = lttng_metadata_printf(session,
" context := struct {\n");
{
return lttng_metadata_printf(session,
"struct packet_context {\n"
- " uint64_t timestamp_begin;\n"
- " uint64_t timestamp_end;\n"
+ " uint64_clock_monotonic_t timestamp_begin;\n"
+ " uint64_clock_monotonic_t timestamp_end;\n"
" uint32_t events_discarded;\n"
" uint32_t content_size;\n"
" uint32_t packet_size;\n"
" enum : uint5_t { compact = 0 ... 30, extended = 31 } id;\n"
" variant <id> {\n"
" struct {\n"
- " uint27_t timestamp;\n"
+ " uint27_clock_monotonic_t timestamp;\n"
" } compact;\n"
" struct {\n"
" uint32_t id;\n"
- " uint64_t timestamp;\n"
+ " uint64_clock_monotonic_t timestamp;\n"
" } extended;\n"
" } v;\n"
"} align(%u);\n"
" enum : uint16_t { compact = 0 ... 65534, extended = 65535 } id;\n"
" variant <id> {\n"
" struct {\n"
- " uint32_t timestamp;\n"
+ " uint32_clock_monotonic_t timestamp;\n"
" } compact;\n"
" struct {\n"
" uint32_t id;\n"
- " uint64_t timestamp;\n"
+ " uint64_clock_monotonic_t timestamp;\n"
" } extended;\n"
" } v;\n"
"} align(%u);\n\n",
);
}
+/*
+ * Approximation of NTP time of day to clock monotonic correlation,
+ * taken at start of trace.
+ * Yes, this is only an approximation. Yes, we can (and will) do better
+ * in future versions.
+ */
+static
+uint64_t measure_clock_offset(void)
+{
+ uint64_t offset, monotonic[2], realtime;
+ struct timespec rts = { 0, 0 };
+ int ret;
+
+ monotonic[0] = trace_clock_read64();
+ ret = clock_gettime(CLOCK_REALTIME, &rts);
+ if (ret < 0)
+ return 0;
+ monotonic[1] = trace_clock_read64();
+ offset = (monotonic[0] + monotonic[1]) >> 1;
+ realtime = (uint64_t) rts.tv_sec * 1000000000ULL;
+ realtime += rts.tv_nsec;
+ offset = realtime - offset;
+ return offset;
+}
+
/*
* Output metadata into this session's metadata buffers.
*/
int _ltt_session_metadata_statedump(struct ltt_session *session)
{
unsigned char *uuid_c = session->uuid;
- char uuid_s[37];
+ char uuid_s[37], clock_uuid_s[CLOCK_UUID_LEN];
struct ltt_channel *chan;
struct ltt_event *event;
int ret = 0;
+ char procname[PROCNAME_LEN] = "";
if (!CMM_ACCESS_ONCE(session->active))
return 0;
lttng_alignof(uint16_t) * CHAR_BIT,
lttng_alignof(uint32_t) * CHAR_BIT,
lttng_alignof(uint64_t) * CHAR_BIT,
- CTF_VERSION_MAJOR,
- CTF_VERSION_MINOR,
+ CTF_SPEC_MAJOR,
+ CTF_SPEC_MINOR,
uuid_s,
#if (BYTE_ORDER == BIG_ENDIAN)
"be"
if (ret)
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';
+ ret = lttng_metadata_printf(session,
+ "env {\n"
+ " vpid = %d;\n"
+ " procname = \"%s\";\n"
+ " domain = \"ust\";\n"
+ " tracer_name = \"lttng-ust\";\n"
+ " tracer_major = %u;\n"
+ " tracer_minor = %u;\n"
+ " tracer_patchlevel = %u;\n"
+ "};\n\n",
+ (int) getpid(),
+ procname,
+ LTTNG_UST_MAJOR_VERSION,
+ LTTNG_UST_MINOR_VERSION,
+ LTTNG_UST_PATCHLEVEL_VERSION
+ );
+ if (ret)
+ goto end;
+
+ ret = lttng_metadata_printf(session,
+ "clock {\n"
+ " name = %s;\n",
+ "monotonic"
+ );
+ if (ret)
+ goto end;
+
+ if (!trace_clock_uuid(clock_uuid_s)) {
+ ret = lttng_metadata_printf(session,
+ " uuid = \"%s\";\n",
+ clock_uuid_s
+ );
+ if (ret)
+ goto end;
+ }
+
+ ret = lttng_metadata_printf(session,
+ " description = \"Monotonic Clock\";\n"
+ " freq = %" PRIu64 "; /* Frequency, in Hz */\n"
+ " /* clock value offset from Epoch is: offset * (1/freq) */\n"
+ " offset = %" PRIu64 ";\n"
+ "};\n\n",
+ trace_clock_freq(),
+ measure_clock_offset()
+ );
+ if (ret)
+ goto end;
+
+ ret = lttng_metadata_printf(session,
+ "typealias integer {\n"
+ " size = 27; align = 1; signed = false;\n"
+ " map = clock.monotonic.value;\n"
+ "} := uint27_clock_monotonic_t;\n"
+ "\n"
+ "typealias integer {\n"
+ " size = 32; align = %u; signed = false;\n"
+ " map = clock.monotonic.value;\n"
+ "} := uint32_clock_monotonic_t;\n"
+ "\n"
+ "typealias integer {\n"
+ " size = 64; align = %u; signed = false;\n"
+ " map = clock.monotonic.value;\n"
+ "} := uint64_clock_monotonic_t;\n\n",
+ lttng_alignof(uint32_t) * CHAR_BIT,
+ lttng_alignof(uint64_t) * CHAR_BIT
+ );
+ if (ret)
+ goto end;
+
ret = _ltt_stream_packet_context_declare(session);
if (ret)
goto end;
cds_list_for_each_entry_safe(session, tmpsession, &sessions, list)
ltt_session_destroy(session);
}
+
+/* WILDCARDS */
+
+static
+int wildcard_same_loglevel(struct wildcard_entry *e,
+ enum lttng_ust_loglevel_type loglevel_type,
+ int loglevel)
+{
+ if (e->loglevel_type == loglevel_type && e->loglevel == loglevel)
+ return 1;
+ else
+ return 0;
+}
+
+#if 0
+static
+int wildcard_is_within(struct wildcard_entry *e,
+ enum lttng_ust_loglevel_type loglevel_type,
+ int loglevel)
+{
+ if (e->loglevel_type == LTTNG_UST_LOGLEVEL_ALL
+ || e->loglevel == -1)
+ return 1;
+ switch (e->loglevel_type) {
+ case LTTNG_UST_LOGLEVEL_RANGE:
+ switch (loglevel_type) {
+ case LTTNG_UST_LOGLEVEL_RANGE:
+ if (e->loglevel >= loglevel)
+ return 1;
+ else
+ return 0;
+ case LTTNG_UST_LOGLEVEL_SINGLE:
+ if (e->loglevel <= 0 && loglevel == 0)
+ return 1;
+ else
+ return 0;
+ }
+ case LTTNG_UST_LOGLEVEL_SINGLE:
+ switch (loglevel_type) {
+ case LTTNG_UST_LOGLEVEL_RANGE:
+ if (loglevel <= 0)
+ return 1;
+ else
+ return 0;
+ case LTTNG_UST_LOGLEVEL_SINGLE:
+ if (e->loglevel == loglevel)
+ return 1;
+ else
+ return 0;
+ }
+ }
+}
+#endif
+
+/*
+ * Add the wildcard to the wildcard list. Must be called with
+ * ust lock held.
+ */
+static
+struct session_wildcard *add_wildcard(struct ltt_channel *chan,
+ struct lttng_ust_event *event_param)
+{
+ struct wildcard_entry *e;
+ struct session_wildcard *sw;
+ size_t name_len = strlen(event_param->name) + 1;
+ int found = 0;
+
+ /*
+ * Try to find global wildcard entry. Given that this is shared
+ * across all sessions, we need to check for exact loglevel
+ * match, not just whether contained within the existing ones.
+ */
+ cds_list_for_each_entry(e, &wildcard_list, list) {
+ if (!strncmp(event_param->name, e->name,
+ LTTNG_UST_SYM_NAME_LEN - 1)) {
+ if (wildcard_same_loglevel(e,
+ event_param->loglevel_type,
+ event_param->loglevel)) {
+ found = 1;
+ break;
+ }
+ }
+ }
+
+ if (!found) {
+ /*
+ * Create global wildcard entry if not found. Using
+ * zmalloc here to allocate a variable length element.
+ * Could cause some memory fragmentation if overused.
+ */
+ e = zmalloc(sizeof(struct wildcard_entry) + name_len);
+ 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);
+ }
+
+ /* session wildcard */
+ cds_list_for_each_entry(sw, &e->session_list, session_list) {
+ if (chan == sw->chan) {
+ DBG("wildcard %s busy for this channel",
+ event_param->name);
+ return ERR_PTR(-EEXIST); /* Already there */
+ }
+ }
+ sw = zmalloc(sizeof(struct session_wildcard));
+ if (!sw)
+ return ERR_PTR(-ENOMEM);
+ sw->chan = chan;
+ sw->enabled = 1;
+ memcpy(&sw->event_param, event_param, sizeof(sw->event_param));
+ sw->event_param.instrumentation = LTTNG_UST_TRACEPOINT;
+ sw->event_param.loglevel_type = event_param->loglevel_type;
+ sw->event_param.loglevel = event_param->loglevel;
+ CDS_INIT_LIST_HEAD(&sw->events);
+ cds_list_add(&sw->list, &chan->session->wildcards);
+ cds_list_add(&sw->session_list, &e->session_list);
+ sw->entry = e;
+ ltt_probes_create_wildcard_events(e, sw);
+ return sw;
+}
+
+/*
+ * Remove the wildcard from the wildcard list. Must be called with
+ * ust_lock held. Only called at session teardown.
+ */
+static
+void _remove_wildcard(struct session_wildcard *wildcard)
+{
+ struct ltt_event *ev, *tmp;
+
+ /*
+ * Just remove the events owned (for enable/disable) by this
+ * wildcard from the list. The session teardown will take care
+ * of freeing the event memory.
+ */
+ cds_list_for_each_entry_safe(ev, tmp, &wildcard->events,
+ wildcard_list) {
+ cds_list_del(&ev->wildcard_list);
+ }
+ cds_list_del(&wildcard->session_list);
+ cds_list_del(&wildcard->list);
+ if (cds_list_empty(&wildcard->entry->session_list)) {
+ cds_list_del(&wildcard->entry->list);
+ free(wildcard->entry);
+ }
+ free(wildcard);
+}
+
+int ltt_wildcard_create(struct ltt_channel *chan,
+ struct lttng_ust_event *event_param,
+ struct session_wildcard **_sw)
+{
+ struct session_wildcard *sw;
+
+ sw = add_wildcard(chan, event_param);
+ if (!sw || IS_ERR(sw)) {
+ return PTR_ERR(sw);
+ }
+ *_sw = sw;
+ return 0;
+}
+
+static
+void _ltt_wildcard_destroy(struct session_wildcard *sw)
+{
+ _remove_wildcard(sw);
+}
+
+int ltt_wildcard_enable(struct session_wildcard *wildcard)
+{
+ struct ltt_event *ev;
+ int ret;
+
+ if (wildcard->enabled)
+ return -EEXIST;
+ cds_list_for_each_entry(ev, &wildcard->events, wildcard_list) {
+ ret = ltt_event_enable(ev);
+ if (ret) {
+ DBG("Error: enable error.\n");
+ return ret;
+ }
+ }
+ wildcard->enabled = 1;
+ return 0;
+}
+
+int ltt_wildcard_disable(struct session_wildcard *wildcard)
+{
+ struct ltt_event *ev;
+ int ret;
+
+ if (!wildcard->enabled)
+ return -EEXIST;
+ cds_list_for_each_entry(ev, &wildcard->events, wildcard_list) {
+ ret = ltt_event_disable(ev);
+ if (ret) {
+ DBG("Error: disable error.\n");
+ return ret;
+ }
+ }
+ 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