/*
* Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
*
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; only version 2
- * of the License.
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License, version 2 only,
+ * as published by the Free Software Foundation.
*
* This program 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 General Public License for more details.
*
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#define _GNU_SOURCE
#include <string.h>
#include <unistd.h>
-#include <common/lttngerr.h>
#include <common/common.h>
#include <common/defaults.h>
+#include "consumer.h"
#include "trace-kernel.h"
/*
{
struct ltt_kernel_channel *chan;
- if (session == NULL) {
- ERR("Undefine session");
- goto error;
- }
+ assert(session);
+ assert(name);
+
+ /*
+ * If we receive an empty string for channel name, it means the
+ * default channel name is requested.
+ */
+ if (name[0] == '\0')
+ name = DEFAULT_CHANNEL_NAME;
DBG("Trying to find channel %s", name);
}
}
-error:
return NULL;
}
{
struct ltt_kernel_event *ev;
- if (channel == NULL) {
- ERR("Undefine channel");
- goto error;
- }
+ assert(name);
+ assert(channel);
cds_list_for_each_entry(ev, &channel->events_list.head, list) {
if (strcmp(name, ev->event->name) == 0) {
}
}
-error:
return NULL;
}
*
* Return pointer to structure or NULL.
*/
-struct ltt_kernel_session *trace_kernel_create_session(char *path)
+struct ltt_kernel_session *trace_kernel_create_session(void)
{
- int ret;
- struct ltt_kernel_session *lks;
+ struct ltt_kernel_session *lks = NULL;
/* Allocate a new ltt kernel session */
lks = zmalloc(sizeof(struct ltt_kernel_session));
if (lks == NULL) {
- perror("create kernel session zmalloc");
- goto error;
+ PERROR("create kernel session zmalloc");
+ goto alloc_error;
}
/* Init data structure */
- lks->fd = 0;
- lks->metadata_stream_fd = 0;
+ lks->fd = -1;
+ lks->metadata_stream_fd = -1;
lks->channel_count = 0;
lks->stream_count_global = 0;
lks->metadata = NULL;
- lks->consumer_fd = 0;
CDS_INIT_LIST_HEAD(&lks->channel_list.head);
- /* Set session path */
- ret = asprintf(&lks->trace_path, "%s/kernel", path);
- if (ret < 0) {
- perror("asprintf kernel traces path");
+ lks->consumer = consumer_create_output(CONSUMER_DST_LOCAL);
+ if (lks->consumer == NULL) {
goto error;
}
+ /*
+ * The tmp_consumer stays NULL until a set_consumer_uri command is
+ * executed. At this point, the consumer should be nullify until an
+ * enable_consumer command. This assignment is symbolic since we've zmalloc
+ * the struct.
+ */
+ lks->tmp_consumer = NULL;
+
return lks;
error:
+ free(lks);
+
+alloc_error:
return NULL;
}
*
* Return pointer to structure or NULL.
*/
-struct ltt_kernel_channel *trace_kernel_create_channel(struct lttng_channel *chan, char *path)
+struct ltt_kernel_channel *trace_kernel_create_channel(
+ struct lttng_channel *chan)
{
- int ret;
struct ltt_kernel_channel *lkc;
+ assert(chan);
+
lkc = zmalloc(sizeof(struct ltt_kernel_channel));
if (lkc == NULL) {
- perror("ltt_kernel_channel zmalloc");
+ PERROR("ltt_kernel_channel zmalloc");
goto error;
}
lkc->channel = zmalloc(sizeof(struct lttng_channel));
if (lkc->channel == NULL) {
- perror("lttng_channel zmalloc");
+ PERROR("lttng_channel zmalloc");
+ free(lkc);
goto error;
}
memcpy(lkc->channel, chan, sizeof(struct lttng_channel));
- lkc->fd = 0;
+ /*
+ * If we receive an empty string for channel name, it means the
+ * default channel name is requested.
+ */
+ if (chan->name[0] == '\0') {
+ strncpy(lkc->channel->name, DEFAULT_CHANNEL_NAME,
+ sizeof(lkc->channel->name));
+ }
+ lkc->channel->name[LTTNG_KERNEL_SYM_NAME_LEN - 1] = '\0';
+
+ lkc->fd = -1;
lkc->stream_count = 0;
lkc->event_count = 0;
lkc->enabled = 1;
/* Init linked list */
CDS_INIT_LIST_HEAD(&lkc->events_list.head);
CDS_INIT_LIST_HEAD(&lkc->stream_list.head);
- /* Set default trace output path */
- ret = asprintf(&lkc->pathname, "%s", path);
- if (ret < 0) {
- perror("asprintf kernel create channel");
- goto error;
- }
return lkc;
struct ltt_kernel_event *lke;
struct lttng_kernel_event *attr;
+ assert(ev);
+
lke = zmalloc(sizeof(struct ltt_kernel_event));
attr = zmalloc(sizeof(struct lttng_kernel_event));
if (lke == NULL || attr == NULL) {
- perror("kernel event zmalloc");
+ PERROR("kernel event zmalloc");
goto error;
}
attr->u.kprobe.addr = ev->attr.probe.addr;
attr->u.kprobe.offset = ev->attr.probe.offset;
strncpy(attr->u.kprobe.symbol_name,
- ev->attr.probe.symbol_name, LTTNG_SYM_NAME_LEN);
- attr->u.kprobe.symbol_name[LTTNG_SYM_NAME_LEN - 1] = '\0';
+ ev->attr.probe.symbol_name, LTTNG_KERNEL_SYM_NAME_LEN);
+ attr->u.kprobe.symbol_name[LTTNG_KERNEL_SYM_NAME_LEN - 1] = '\0';
break;
case LTTNG_EVENT_FUNCTION:
attr->instrumentation = LTTNG_KERNEL_KRETPROBE;
attr->u.kretprobe.addr = ev->attr.probe.addr;
attr->u.kretprobe.offset = ev->attr.probe.offset;
- attr->u.kretprobe.offset = ev->attr.probe.offset;
strncpy(attr->u.kretprobe.symbol_name,
- ev->attr.probe.symbol_name, LTTNG_SYM_NAME_LEN);
- attr->u.kretprobe.symbol_name[LTTNG_SYM_NAME_LEN - 1] = '\0';
+ ev->attr.probe.symbol_name, LTTNG_KERNEL_SYM_NAME_LEN);
+ attr->u.kretprobe.symbol_name[LTTNG_KERNEL_SYM_NAME_LEN - 1] = '\0';
break;
case LTTNG_EVENT_FUNCTION_ENTRY:
attr->instrumentation = LTTNG_KERNEL_FUNCTION;
strncpy(attr->u.ftrace.symbol_name,
- ev->attr.ftrace.symbol_name, LTTNG_SYM_NAME_LEN);
- attr->u.ftrace.symbol_name[LTTNG_SYM_NAME_LEN - 1] = '\0';
+ ev->attr.ftrace.symbol_name, LTTNG_KERNEL_SYM_NAME_LEN);
+ attr->u.ftrace.symbol_name[LTTNG_KERNEL_SYM_NAME_LEN - 1] = '\0';
break;
case LTTNG_EVENT_TRACEPOINT:
attr->instrumentation = LTTNG_KERNEL_TRACEPOINT;
}
/* Copy event name */
- strncpy(attr->name, ev->name, LTTNG_SYM_NAME_LEN);
- attr->name[LTTNG_SYM_NAME_LEN - 1] = '\0';
+ strncpy(attr->name, ev->name, LTTNG_KERNEL_SYM_NAME_LEN);
+ attr->name[LTTNG_KERNEL_SYM_NAME_LEN - 1] = '\0';
/* Setting up a kernel event */
- lke->fd = 0;
+ lke->fd = -1;
lke->event = attr;
lke->enabled = 1;
- lke->ctx = NULL;
return lke;
error:
+ free(lke);
+ free(attr);
return NULL;
}
*
* Return pointer to structure or NULL.
*/
-struct ltt_kernel_metadata *trace_kernel_create_metadata(char *path)
+struct ltt_kernel_metadata *trace_kernel_create_metadata(void)
{
- int ret;
struct ltt_kernel_metadata *lkm;
struct lttng_channel *chan;
lkm = zmalloc(sizeof(struct ltt_kernel_metadata));
chan = zmalloc(sizeof(struct lttng_channel));
if (lkm == NULL || chan == NULL) {
- perror("kernel metadata zmalloc");
+ PERROR("kernel metadata zmalloc");
goto error;
}
/* Set default attributes */
chan->attr.overwrite = DEFAULT_CHANNEL_OVERWRITE;
- chan->attr.subbuf_size = DEFAULT_METADATA_SUBBUF_SIZE;
+ chan->attr.subbuf_size = default_get_metadata_subbuf_size();
chan->attr.num_subbuf = DEFAULT_METADATA_SUBBUF_NUM;
- chan->attr.switch_timer_interval = DEFAULT_CHANNEL_SWITCH_TIMER;
- chan->attr.read_timer_interval = DEFAULT_CHANNEL_READ_TIMER;
+ chan->attr.switch_timer_interval = DEFAULT_KERNEL_CHANNEL_SWITCH_TIMER;
+ chan->attr.read_timer_interval = DEFAULT_KERNEL_CHANNEL_READ_TIMER;
chan->attr.output = DEFAULT_KERNEL_CHANNEL_OUTPUT;
/* Init metadata */
- lkm->fd = 0;
+ lkm->fd = -1;
lkm->conf = chan;
- /* Set default metadata path */
- ret = asprintf(&lkm->pathname, "%s/metadata", path);
- if (ret < 0) {
- perror("asprintf kernel metadata");
- goto error;
- }
return lkm;
error:
+ free(lkm);
+ free(chan);
return NULL;
}
*
* Return pointer to structure or NULL.
*/
-struct ltt_kernel_stream *trace_kernel_create_stream(void)
+struct ltt_kernel_stream *trace_kernel_create_stream(const char *name,
+ unsigned int count)
{
+ int ret;
struct ltt_kernel_stream *lks;
+ assert(name);
+
lks = zmalloc(sizeof(struct ltt_kernel_stream));
if (lks == NULL) {
- perror("kernel stream zmalloc");
+ PERROR("kernel stream zmalloc");
goto error;
}
+ /* Set name */
+ ret = snprintf(lks->name, sizeof(lks->name), "%s_%d", name, count);
+ if (ret < 0) {
+ PERROR("snprintf stream name");
+ goto error;
+ }
+ lks->name[sizeof(lks->name) - 1] = '\0';
+
/* Init stream */
- lks->fd = 0;
- lks->pathname = NULL;
+ lks->fd = -1;
lks->state = 0;
+ lks->cpu = count;
return lks;
*/
void trace_kernel_destroy_stream(struct ltt_kernel_stream *stream)
{
+ assert(stream);
+
DBG("[trace] Closing stream fd %d", stream->fd);
/* Close kernel fd */
- close(stream->fd);
+ if (stream->fd >= 0) {
+ int ret;
+
+ ret = close(stream->fd);
+ if (ret) {
+ PERROR("close");
+ }
+ }
/* Remove from stream list */
cds_list_del(&stream->list);
- free(stream->pathname);
free(stream);
}
*/
void trace_kernel_destroy_event(struct ltt_kernel_event *event)
{
- DBG("[trace] Closing event fd %d", event->fd);
- /* Close kernel fd */
- close(event->fd);
+ assert(event);
+
+ if (event->fd >= 0) {
+ int ret;
+
+ DBG("[trace] Closing event fd %d", event->fd);
+ /* Close kernel fd */
+ ret = close(event->fd);
+ if (ret) {
+ PERROR("close");
+ }
+ } else {
+ DBG("[trace] Tearing down event (no associated fd)");
+ }
/* Remove from event list */
cds_list_del(&event->list);
free(event->event);
- free(event->ctx);
free(event);
}
{
struct ltt_kernel_stream *stream, *stmp;
struct ltt_kernel_event *event, *etmp;
+ int ret;
+
+ assert(channel);
DBG("[trace] Closing channel fd %d", channel->fd);
/* Close kernel fd */
- close(channel->fd);
+ if (channel->fd >= 0) {
+ ret = close(channel->fd);
+ if (ret) {
+ PERROR("close");
+ }
+ }
/* For each stream in the channel list */
cds_list_for_each_entry_safe(stream, stmp, &channel->stream_list.head, list) {
/* Remove from channel list */
cds_list_del(&channel->list);
- free(channel->pathname);
free(channel->channel);
free(channel->ctx);
free(channel);
*/
void trace_kernel_destroy_metadata(struct ltt_kernel_metadata *metadata)
{
+ assert(metadata);
+
DBG("[trace] Closing metadata fd %d", metadata->fd);
/* Close kernel fd */
- close(metadata->fd);
+ if (metadata->fd >= 0) {
+ int ret;
+
+ ret = close(metadata->fd);
+ if (ret) {
+ PERROR("close");
+ }
+ }
free(metadata->conf);
- free(metadata->pathname);
free(metadata);
}
/*
* Cleanup kernel session structure
+ *
+ * Should *NOT* be called with RCU read-side lock held.
*/
void trace_kernel_destroy_session(struct ltt_kernel_session *session)
{
struct ltt_kernel_channel *channel, *ctmp;
+ int ret;
+
+ assert(session);
DBG("[trace] Closing session fd %d", session->fd);
/* Close kernel fds */
- close(session->fd);
+ if (session->fd >= 0) {
+ ret = close(session->fd);
+ if (ret) {
+ PERROR("close");
+ }
+ }
- if (session->metadata_stream_fd != 0) {
+ if (session->metadata_stream_fd >= 0) {
DBG("[trace] Closing metadata stream fd %d", session->metadata_stream_fd);
- close(session->metadata_stream_fd);
+ ret = close(session->metadata_stream_fd);
+ if (ret) {
+ PERROR("close");
+ }
}
if (session->metadata != NULL) {
trace_kernel_destroy_channel(channel);
}
- free(session->trace_path);
+ /* Wipe consumer output object */
+ consumer_destroy_output(session->consumer);
+ consumer_destroy_output(session->tmp_consumer);
+
free(session);
}
projects / lttng-tools.git / blobdiff