* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
-#define _GNU_SOURCE
+#define _LGPL_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
* Add kernel context to all channel.
*/
static int add_kctx_all_channels(struct ltt_kernel_session *ksession,
- struct lttng_kernel_context *kctx)
+ struct ltt_kernel_context *kctx)
{
int ret;
struct ltt_kernel_channel *kchan;
+ assert(ksession);
+ assert(kctx);
+
DBG("Adding kernel context to all channels");
/* Go over all channels */
/*
* Add kernel context to a specific channel.
*/
-static int add_kctx_to_channel(struct lttng_kernel_context *kctx,
+static int add_kctx_to_channel(struct ltt_kernel_context *kctx,
struct ltt_kernel_channel *kchan)
{
int ret;
+ assert(kchan);
+ assert(kctx);
+
DBG("Add kernel context to channel '%s'", kchan->channel->name);
ret = kernel_add_channel_context(kchan, kctx);
{
int ret;
struct ltt_ust_context *uctx;
- struct lttng_ht_iter iter;
- struct lttng_ht_node_ulong *uctx_node;
+
+ assert(usess);
+ assert(uchan);
+ assert(ctx);
+
+ /* Check if context is duplicate */
+ cds_list_for_each_entry(uctx, &uchan->ctx_list, list) {
+ if (trace_ust_match_context(uctx, ctx)) {
+ ret = -EEXIST;
+ goto duplicate;
+ }
+ }
/* Create ltt UST context */
uctx = trace_ust_create_context(ctx);
goto error;
}
- /* Lookup context before adding it */
- lttng_ht_lookup(uchan->ctx, (void *)((unsigned long)uctx->ctx.ctx), &iter);
- uctx_node = lttng_ht_iter_get_node_ulong(&iter);
- if (uctx_node != NULL) {
- ret = -EEXIST;
- goto error;
- }
+ rcu_read_lock();
/* Add ltt UST context node to ltt UST channel */
- lttng_ht_add_unique_ulong(uchan->ctx, &uctx->node);
+ lttng_ht_add_ulong(uchan->ctx, &uctx->node);
+ rcu_read_unlock();
+ cds_list_add_tail(&uctx->list, &uchan->ctx_list);
DBG("Context UST %d added to channel %s", uctx->ctx.ctx, uchan->name);
error:
free(uctx);
+duplicate:
return ret;
}
{
int ret;
struct ltt_kernel_channel *kchan;
- struct lttng_kernel_context kctx;
+ struct ltt_kernel_context *kctx;
+
+ assert(ksession);
+ assert(ctx);
+ assert(channel_name);
+
+ kctx = trace_kernel_create_context(NULL);
+ if (!kctx) {
+ ret = LTTNG_ERR_NOMEM;
+ goto error;
+ }
/* Setup kernel context structure */
switch (ctx->ctx) {
case LTTNG_EVENT_CONTEXT_PID:
- kctx.ctx = LTTNG_KERNEL_CONTEXT_PID;
- break;
- case LTTNG_EVENT_CONTEXT_PERF_COUNTER:
- kctx.ctx = LTTNG_KERNEL_CONTEXT_PERF_COUNTER;
+ kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_PID;
break;
case LTTNG_EVENT_CONTEXT_PROCNAME:
- kctx.ctx = LTTNG_KERNEL_CONTEXT_PROCNAME;
+ kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_PROCNAME;
break;
case LTTNG_EVENT_CONTEXT_PRIO:
- kctx.ctx = LTTNG_KERNEL_CONTEXT_PRIO;
+ kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_PRIO;
break;
case LTTNG_EVENT_CONTEXT_NICE:
- kctx.ctx = LTTNG_KERNEL_CONTEXT_NICE;
+ kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_NICE;
break;
case LTTNG_EVENT_CONTEXT_VPID:
- kctx.ctx = LTTNG_KERNEL_CONTEXT_VPID;
+ kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_VPID;
break;
case LTTNG_EVENT_CONTEXT_TID:
- kctx.ctx = LTTNG_KERNEL_CONTEXT_TID;
+ kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_TID;
break;
case LTTNG_EVENT_CONTEXT_VTID:
- kctx.ctx = LTTNG_KERNEL_CONTEXT_VTID;
+ kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_VTID;
break;
case LTTNG_EVENT_CONTEXT_PPID:
- kctx.ctx = LTTNG_KERNEL_CONTEXT_PPID;
+ kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_PPID;
break;
case LTTNG_EVENT_CONTEXT_VPPID:
- kctx.ctx = LTTNG_KERNEL_CONTEXT_VPPID;
+ kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_VPPID;
break;
case LTTNG_EVENT_CONTEXT_HOSTNAME:
- kctx.ctx = LTTNG_KERNEL_CONTEXT_HOSTNAME;
+ kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_HOSTNAME;
+ break;
+ case LTTNG_EVENT_CONTEXT_PERF_CPU_COUNTER:
+ case LTTNG_EVENT_CONTEXT_PERF_COUNTER:
+ kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_PERF_CPU_COUNTER;
break;
default:
- return LTTNG_ERR_KERN_CONTEXT_FAIL;
+ ret = LTTNG_ERR_KERN_CONTEXT_FAIL;
+ goto error;
}
- kctx.u.perf_counter.type = ctx->u.perf_counter.type;
- kctx.u.perf_counter.config = ctx->u.perf_counter.config;
- strncpy(kctx.u.perf_counter.name, ctx->u.perf_counter.name,
+ kctx->ctx.u.perf_counter.type = ctx->u.perf_counter.type;
+ kctx->ctx.u.perf_counter.config = ctx->u.perf_counter.config;
+ strncpy(kctx->ctx.u.perf_counter.name, ctx->u.perf_counter.name,
LTTNG_SYMBOL_NAME_LEN);
- kctx.u.perf_counter.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
+ kctx->ctx.u.perf_counter.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
- if (strlen(channel_name) == 0) {
- ret = add_kctx_all_channels(ksession, &kctx);
+ if (*channel_name == '\0') {
+ ret = add_kctx_all_channels(ksession, kctx);
if (ret != LTTNG_OK) {
goto error;
}
goto error;
}
- ret = add_kctx_to_channel(&kctx, kchan);
+ ret = add_kctx_to_channel(kctx, kchan);
if (ret != LTTNG_OK) {
goto error;
}
}
- ret = LTTNG_OK;
+ return LTTNG_OK;
error:
+ if (kctx) {
+ trace_kernel_destroy_context(kctx);
+ }
return ret;
}
struct lttng_ht *chan_ht;
struct ltt_ust_channel *uchan = NULL;
+ assert(usess);
+ assert(ctx);
+ assert(channel_name);
+
+ rcu_read_lock();
+
/*
* Define which channel's hashtable to use from the domain or quit if
* unknown domain.
case LTTNG_DOMAIN_UST:
chan_ht = usess->domain_global.channels;
break;
-#if 0
- case LTTNG_DOMAIN_UST_EXEC_NAME:
- case LTTNG_DOMAIN_UST_PID:
- case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN:
-#endif
default:
ret = LTTNG_ERR_UND;
goto error;
}
/* Get UST channel if defined */
- if (strlen(channel_name) != 0) {
+ if (channel_name[0] != '\0') {
uchan = trace_ust_find_channel_by_name(chan_ht, channel_name);
if (uchan == NULL) {
ret = LTTNG_ERR_UST_CHAN_NOT_FOUND;
/* Add ctx to channel */
ret = add_uctx_to_channel(usess, domain, uchan, ctx);
} else {
+ rcu_read_lock();
/* Add ctx all events, all channels */
cds_lfht_for_each_entry(chan_ht->ht, &iter.iter, uchan, node.node) {
ret = add_uctx_to_channel(usess, domain, uchan, ctx);
continue;
}
}
+ rcu_read_unlock();
}
switch (ret) {
}
error:
+ rcu_read_unlock();
return ret;
}
projects / lttng-tools.git / blobdiff