X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=lttng-sessiond%2Ftrace-ust.c;fp=lttng-sessiond%2Ftrace-ust.c;h=0000000000000000000000000000000000000000;hp=c85e79ce14fba897c280d1efaefa3d3602664cc0;hb=10a8a2237343699e3923d87e24dbf2d7fe225377;hpb=734f79bf717d87817623d382c59086dc9e8ef610

diff --git a/lttng-sessiond/trace-ust.c b/lttng-sessiond/trace-ust.c
deleted file mode 100644
index c85e79ce1..000000000
--- a/lttng-sessiond/trace-ust.c
+++ /dev/null
@@ -1,513 +0,0 @@
-/*
- * 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 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.
- */
-
-#define _GNU_SOURCE
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-
-#include <lttngerr.h>
-#include <lttng-ht.h>
-#include <lttng-share.h>
-
-#include "trace-ust.h"
-
-/*
- * Find the channel in the hashtable.
- */
-struct ltt_ust_channel *trace_ust_find_channel_by_name(struct lttng_ht *ht,
-		char *name)
-{
-	struct lttng_ht_node_str *node;
-	struct lttng_ht_iter iter;
-
-	rcu_read_lock();
-	lttng_ht_lookup(ht, (void *)name, &iter);
-	node = lttng_ht_iter_get_node_str(&iter);
-	if (node == NULL) {
-		rcu_read_unlock();
-		goto error;
-	}
-	rcu_read_unlock();
-
-	DBG2("Trace UST channel %s found by name", name);
-
-	return caa_container_of(node, struct ltt_ust_channel, node);
-
-error:
-	DBG2("Trace UST channel %s not found by name", name);
-	return NULL;
-}
-
-/*
- * Find the event in the hashtable.
- */
-struct ltt_ust_event *trace_ust_find_event_by_name(struct lttng_ht *ht,
-		char *name)
-{
-	struct lttng_ht_node_str *node;
-	struct lttng_ht_iter iter;
-
-	rcu_read_lock();
-	lttng_ht_lookup(ht, (void *) name, &iter);
-	node = lttng_ht_iter_get_node_str(&iter);
-	if (node == NULL) {
-		rcu_read_unlock();
-		goto error;
-	}
-	rcu_read_unlock();
-
-	DBG2("Trace UST event found by name %s", name);
-
-	return caa_container_of(node, struct ltt_ust_event, node);
-
-error:
-	DBG2("Trace UST event NOT found by name %s", name);
-	return NULL;
-}
-
-/*
- * Allocate and initialize a ust session data structure.
- *
- * Return pointer to structure or NULL.
- */
-struct ltt_ust_session *trace_ust_create_session(char *path, int session_id,
-		struct lttng_domain *domain)
-{
-	int ret;
-	struct ltt_ust_session *lus;
-
-	/* Allocate a new ltt ust session */
-	lus = zmalloc(sizeof(struct ltt_ust_session));
-	if (lus == NULL) {
-		PERROR("create ust session zmalloc");
-		goto error;
-	}
-
-	/* Init data structure */
-	lus->id = session_id;
-	lus->start_trace = 0;
-
-	/* Alloc UST domain hash tables */
-	lus->domain_pid = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG);
-	lus->domain_exec = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG);
-
-	/* Alloc UST global domain channels' HT */
-	lus->domain_global.channels = lttng_ht_new(0, LTTNG_HT_TYPE_STRING);
-
-	/* Set session path */
-	ret = snprintf(lus->pathname, PATH_MAX, "%s/ust", path);
-	if (ret < 0) {
-		PERROR("snprintf kernel traces path");
-		goto error_free_session;
-	}
-
-	DBG2("UST trace session create successful");
-
-	return lus;
-
-error_free_session:
-	free(lus);
-error:
-	return NULL;
-}
-
-/*
- * Allocate and initialize a ust channel data structure.
- *
- * Return pointer to structure or NULL.
- */
-struct ltt_ust_channel *trace_ust_create_channel(struct lttng_channel *chan,
-		char *path)
-{
-	int ret;
-	struct ltt_ust_channel *luc;
-
-	luc = zmalloc(sizeof(struct ltt_ust_channel));
-	if (luc == NULL) {
-		perror("ltt_ust_channel zmalloc");
-		goto error;
-	}
-
-	/* Copy UST channel attributes */
-	luc->attr.overwrite = chan->attr.overwrite;
-	luc->attr.subbuf_size = chan->attr.subbuf_size;
-	luc->attr.num_subbuf = chan->attr.num_subbuf;
-	luc->attr.switch_timer_interval = chan->attr.switch_timer_interval;
-	luc->attr.read_timer_interval = chan->attr.read_timer_interval;
-	luc->attr.output = chan->attr.output;
-
-	/* Translate to UST output enum */
-	switch (luc->attr.output) {
-	default:
-		luc->attr.output = LTTNG_UST_MMAP;
-		break;
-	}
-
-	/* Copy channel name */
-	strncpy(luc->name, chan->name, sizeof(luc->name));
-	luc->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0';
-
-	/* Init node */
-	lttng_ht_node_init_str(&luc->node, luc->name);
-	/* Alloc hash tables */
-	luc->events = lttng_ht_new(0, LTTNG_HT_TYPE_STRING);
-	luc->ctx = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG);
-
-	/* Set trace output path */
-	ret = snprintf(luc->pathname, PATH_MAX, "%s", path);
-	if (ret < 0) {
-		perror("asprintf ust create channel");
-		goto error_free_channel;
-	}
-
-	DBG2("Trace UST channel %s created", luc->name);
-
-	return luc;
-
-error_free_channel:
-	free(luc);
-error:
-	return NULL;
-}
-
-/*
- * Allocate and initialize a ust event. Set name and event type.
- *
- * Return pointer to structure or NULL.
- */
-struct ltt_ust_event *trace_ust_create_event(struct lttng_event *ev)
-{
-	struct ltt_ust_event *lue;
-
-	lue = zmalloc(sizeof(struct ltt_ust_event));
-	if (lue == NULL) {
-		PERROR("ust event zmalloc");
-		goto error;
-	}
-
-	switch (ev->type) {
-	case LTTNG_EVENT_PROBE:
-		lue->attr.instrumentation = LTTNG_UST_PROBE;
-		break;
-	case LTTNG_EVENT_FUNCTION:
-		lue->attr.instrumentation = LTTNG_UST_FUNCTION;
-		break;
-	case LTTNG_EVENT_FUNCTION_ENTRY:
-		lue->attr.instrumentation = LTTNG_UST_FUNCTION;
-		break;
-	case LTTNG_EVENT_TRACEPOINT:
-		lue->attr.instrumentation = LTTNG_UST_TRACEPOINT;
-		break;
-	case LTTNG_EVENT_TRACEPOINT_LOGLEVEL:
-		lue->attr.instrumentation = LTTNG_UST_TRACEPOINT_LOGLEVEL;
-		break;
-	default:
-		ERR("Unknown ust instrumentation type (%d)", ev->type);
-		goto error_free_event;
-	}
-
-	/* Copy event name */
-	strncpy(lue->attr.name, ev->name, LTTNG_UST_SYM_NAME_LEN);
-	lue->attr.name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0';
-
-	/* Init node */
-	lttng_ht_node_init_str(&lue->node, lue->attr.name);
-	/* Alloc context hash tables */
-	lue->ctx = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG);
-
-	DBG2("Trace UST event %s created", lue->attr.name);
-
-	return lue;
-
-error_free_event:
-	free(lue);
-error:
-	return NULL;
-}
-
-/*
- * Allocate and initialize a ust metadata.
- *
- * Return pointer to structure or NULL.
- */
-struct ltt_ust_metadata *trace_ust_create_metadata(char *path)
-{
-	int ret;
-	struct ltt_ust_metadata *lum;
-
-	lum = zmalloc(sizeof(struct ltt_ust_metadata));
-	if (lum == NULL) {
-		perror("ust metadata zmalloc");
-		goto error;
-	}
-
-	/* Set default attributes */
-	lum->attr.overwrite = DEFAULT_CHANNEL_OVERWRITE;
-	lum->attr.subbuf_size = DEFAULT_METADATA_SUBBUF_SIZE;
-	lum->attr.num_subbuf = DEFAULT_METADATA_SUBBUF_NUM;
-	lum->attr.switch_timer_interval = DEFAULT_CHANNEL_SWITCH_TIMER;
-	lum->attr.read_timer_interval = DEFAULT_CHANNEL_READ_TIMER;
-	lum->attr.output = LTTNG_UST_MMAP;
-
-	lum->handle = -1;
-	/* Set metadata trace path */
-	ret = snprintf(lum->pathname, PATH_MAX, "%s/metadata", path);
-	if (ret < 0) {
-		perror("asprintf ust metadata");
-		goto error_free_metadata;
-	}
-
-	return lum;
-
-error_free_metadata:
-	free(lum);
-error:
-	return NULL;
-}
-
-/*
- * Allocate and initialize an UST context.
- *
- * Return pointer to structure or NULL.
- */
-struct ltt_ust_context *trace_ust_create_context(
-		struct lttng_event_context *ctx)
-{
-	struct ltt_ust_context *uctx;
-
-	uctx = zmalloc(sizeof(struct ltt_ust_context));
-	if (uctx == NULL) {
-		PERROR("zmalloc ltt_ust_context");
-		goto error;
-	}
-
-	uctx->ctx.ctx = ctx->ctx;
-	lttng_ht_node_init_ulong(&uctx->node, (unsigned long) uctx->ctx.ctx);
-
-	return uctx;
-
-error:
-	return NULL;
-}
-
-/*
- * RCU safe free context structure.
- */
-static void destroy_context_rcu(struct rcu_head *head)
-{
-	struct lttng_ht_node_ulong *node =
-		caa_container_of(head, struct lttng_ht_node_ulong, head);
-	struct ltt_ust_context *ctx =
-		caa_container_of(node, struct ltt_ust_context, node);
-
-	free(ctx);
-}
-
-/*
- * Cleanup UST context hash table.
- */
-static void destroy_contexts(struct lttng_ht *ht)
-{
-	int ret;
-	struct lttng_ht_node_ulong *node;
-	struct lttng_ht_iter iter;
-
-	cds_lfht_for_each_entry(ht->ht, &iter.iter, node, node) {
-		ret = lttng_ht_del(ht, &iter);
-		if (!ret) {
-			call_rcu(&node->head, destroy_context_rcu);
-		}
-	}
-
-	lttng_ht_destroy(ht);
-}
-
-/*
- * Cleanup ust event structure.
- */
-void trace_ust_destroy_event(struct ltt_ust_event *event)
-{
-	DBG2("Trace destroy UST event %s", event->attr.name);
-	destroy_contexts(event->ctx);
-
-	free(event);
-}
-
-/*
- * URCU intermediate call to complete destroy event.
- */
-static void destroy_event_rcu(struct rcu_head *head)
-{
-	struct lttng_ht_node_str *node =
-		caa_container_of(head, struct lttng_ht_node_str, head);
-	struct ltt_ust_event *event =
-		caa_container_of(node, struct ltt_ust_event, node);
-
-	trace_ust_destroy_event(event);
-}
-
-/*
- * Cleanup UST events hashtable.
- */
-static void destroy_events(struct lttng_ht *events)
-{
-	int ret;
-	struct lttng_ht_node_str *node;
-	struct lttng_ht_iter iter;
-
-	cds_lfht_for_each_entry(events->ht, &iter.iter, node, node) {
-		ret = lttng_ht_del(events, &iter);
-		assert(!ret);
-		call_rcu(&node->head, destroy_event_rcu);
-	}
-
-	lttng_ht_destroy(events);
-}
-
-/*
- * Cleanup ust channel structure.
- */
-void trace_ust_destroy_channel(struct ltt_ust_channel *channel)
-{
-	DBG2("Trace destroy UST channel %s", channel->name);
-
-	rcu_read_lock();
-
-	/* Destroying all events of the channel */
-	destroy_events(channel->events);
-	/* Destroying all context of the channel */
-	destroy_contexts(channel->ctx);
-
-	free(channel);
-
-	rcu_read_unlock();
-}
-
-/*
- * URCU intermediate call to complete destroy channel.
- */
-static void destroy_channel_rcu(struct rcu_head *head)
-{
-	struct lttng_ht_node_str *node =
-		caa_container_of(head, struct lttng_ht_node_str, head);
-	struct ltt_ust_channel *channel =
-		caa_container_of(node, struct ltt_ust_channel, node);
-
-	trace_ust_destroy_channel(channel);
-}
-
-/*
- * Cleanup ust metadata structure.
- */
-void trace_ust_destroy_metadata(struct ltt_ust_metadata *metadata)
-{
-	DBG2("Trace UST destroy metadata %d", metadata->handle);
-
-	free(metadata);
-}
-
-/*
- * Iterate over a hash table containing channels and cleanup safely.
- */
-static void destroy_channels(struct lttng_ht *channels)
-{
-	int ret;
-	struct lttng_ht_node_str *node;
-	struct lttng_ht_iter iter;
-
-	rcu_read_lock();
-
-	cds_lfht_for_each_entry(channels->ht, &iter.iter, node, node) {
-		ret = lttng_ht_del(channels, &iter);
-		assert(!ret);
-		call_rcu(&node->head, destroy_channel_rcu);
-	}
-
-	lttng_ht_destroy(channels);
-
-	rcu_read_unlock();
-}
-
-/*
- * Cleanup UST pid domain.
- */
-static void destroy_domain_pid(struct lttng_ht *ht)
-{
-	int ret;
-	struct lttng_ht_iter iter;
-	struct ltt_ust_domain_pid *dpid;
-
-	cds_lfht_for_each_entry(ht->ht, &iter.iter, dpid, node.node) {
-		ret = lttng_ht_del(ht , &iter);
-		assert(!ret);
-		destroy_channels(dpid->channels);
-	}
-
-	lttng_ht_destroy(ht);
-}
-
-/*
- * Cleanup UST exec name domain.
- */
-static void destroy_domain_exec(struct lttng_ht *ht)
-{
-	int ret;
-	struct lttng_ht_iter iter;
-	struct ltt_ust_domain_exec *dexec;
-
-	cds_lfht_for_each_entry(ht->ht, &iter.iter, dexec, node.node) {
-		ret = lttng_ht_del(ht , &iter);
-		assert(!ret);
-		destroy_channels(dexec->channels);
-	}
-
-	lttng_ht_destroy(ht);
-}
-
-/*
- * Cleanup UST global domain.
- */
-static void destroy_domain_global(struct ltt_ust_domain_global *dom)
-{
-	destroy_channels(dom->channels);
-}
-
-/*
- * Cleanup ust session structure
- */
-void trace_ust_destroy_session(struct ltt_ust_session *session)
-{
-	/* Extra protection */
-	if (session == NULL) {
-		return;
-	}
-
-	rcu_read_lock();
-
-	DBG2("Trace UST destroy session %d", session->id);
-
-	/* Cleaning up UST domain */
-	destroy_domain_global(&session->domain_global);
-	destroy_domain_pid(session->domain_pid);
-	destroy_domain_exec(session->domain_exec);
-
-	free(session);
-
-	rcu_read_unlock();
-}