+++ /dev/null
-/*
- * 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 <urcu/list.h>
-
-#include <common/error.h>
-#include <common/sessiond-comm/sessiond-comm.h>
-
-#include "context.h"
-#include "kernel.h"
-#include "ust-app.h"
-#include "trace-ust.h"
-
-/*
- * Add kernel context to an event of a specific channel.
- */
-static int add_kctx_to_event(struct lttng_kernel_context *kctx,
- struct ltt_kernel_channel *kchan, char *event_name)
-{
- int ret, found = 0;
- struct ltt_kernel_event *kevent;
-
- DBG("Add kernel context to event %s", event_name);
-
- kevent = trace_kernel_get_event_by_name(event_name, kchan);
- if (kevent != NULL) {
- ret = kernel_add_event_context(kevent, kctx);
- if (ret < 0) {
- goto error;
- }
- found = 1;
- }
-
- ret = found;
-
-error:
- return ret;
-}
-
-/*
- * Add kernel context to all channel.
- *
- * If event_name is specified, add context to event instead.
- */
-static int add_kctx_all_channels(struct ltt_kernel_session *ksession,
- struct lttng_kernel_context *kctx, char *event_name)
-{
- int ret, no_event = 0, found = 0;
- struct ltt_kernel_channel *kchan;
-
- if (strlen(event_name) == 0) {
- no_event = 1;
- }
-
- DBG("Adding kernel context to all channels (event: %s)", event_name);
-
- /* Go over all channels */
- cds_list_for_each_entry(kchan, &ksession->channel_list.head, list) {
- if (no_event) {
- ret = kernel_add_channel_context(kchan, kctx);
- if (ret < 0) {
- ret = LTTCOMM_KERN_CONTEXT_FAIL;
- goto error;
- }
- } else {
- ret = add_kctx_to_event(kctx, kchan, event_name);
- if (ret < 0) {
- ret = LTTCOMM_KERN_CONTEXT_FAIL;
- goto error;
- } else if (ret == 1) {
- /* Event found and context added */
- found = 1;
- break;
- }
- }
- }
-
- if (!found && !no_event) {
- ret = LTTCOMM_NO_EVENT;
- goto error;
- }
-
- ret = LTTCOMM_OK;
-
-error:
- return ret;
-}
-
-/*
- * Add kernel context to a specific channel.
- *
- * If event_name is specified, add context to that event.
- */
-static int add_kctx_to_channel(struct lttng_kernel_context *kctx,
- struct ltt_kernel_channel *kchan, char *event_name)
-{
- int ret, no_event = 0, found = 0;
-
- if (strlen(event_name) == 0) {
- no_event = 1;
- }
-
- DBG("Add kernel context to channel '%s', event '%s'",
- kchan->channel->name, event_name);
-
- if (no_event) {
- ret = kernel_add_channel_context(kchan, kctx);
- if (ret < 0) {
- ret = LTTCOMM_KERN_CONTEXT_FAIL;
- goto error;
- }
- } else {
- ret = add_kctx_to_event(kctx, kchan, event_name);
- if (ret < 0) {
- ret = LTTCOMM_KERN_CONTEXT_FAIL;
- goto error;
- } else if (ret == 1) {
- /* Event found and context added */
- found = 1;
- }
- }
-
- if (!found && !no_event) {
- ret = LTTCOMM_NO_EVENT;
- goto error;
- }
-
- ret = LTTCOMM_OK;
-
-error:
- return ret;
-}
-
-/*
- * Add UST context to channel.
- */
-static int add_uctx_to_channel(struct ltt_ust_session *usess, int domain,
- struct ltt_ust_channel *uchan, struct lttng_event_context *ctx)
-{
- int ret;
- struct ltt_ust_context *uctx;
- struct lttng_ht_iter iter;
- struct lttng_ht_node_ulong *uctx_node;
-
- /* Create ltt UST context */
- uctx = trace_ust_create_context(ctx);
- if (uctx == NULL) {
- ret = -EINVAL;
- goto error;
- }
-
- switch (domain) {
- case LTTNG_DOMAIN_UST:
- ret = ust_app_add_ctx_channel_glb(usess, uchan, uctx);
- if (ret < 0) {
- goto error;
- }
- break;
- default:
- ret = -ENOSYS;
- 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;
- }
-
- /* Add ltt UST context node to ltt UST channel */
- lttng_ht_add_unique_ulong(uchan->ctx, &uctx->node);
-
- DBG("Context UST %d added to channel %s", uctx->ctx.ctx, uchan->name);
-
- return 0;
-
-error:
- free(uctx);
- return ret;
-}
-
-/*
- * Add UST context to event.
- */
-static int add_uctx_to_event(struct ltt_ust_session *usess, int domain,
- struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent,
- struct lttng_event_context *ctx)
-{
- int ret;
- struct ltt_ust_context *uctx;
- struct lttng_ht_iter iter;
- struct lttng_ht_node_ulong *uctx_node;
-
- /* Create ltt UST context */
- uctx = trace_ust_create_context(ctx);
- if (uctx == NULL) {
- /* Context values are invalid. */
- ret = -EINVAL;
- goto error;
- }
-
- switch (domain) {
- case LTTNG_DOMAIN_UST:
- ret = ust_app_add_ctx_event_glb(usess, uchan, uevent, uctx);
- if (ret < 0) {
- goto error;
- }
- break;
- default:
- ret = -ENOSYS;
- goto error;
- }
-
- /* Lookup context before adding it */
- lttng_ht_lookup(uevent->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;
- }
-
- /* Add ltt UST context node to ltt UST event */
- lttng_ht_add_unique_ulong(uevent->ctx, &uctx->node);
-
- DBG("Context UST %d added to event %s", uctx->ctx.ctx, uevent->attr.name);
-
- return 0;
-
-error:
- free(uctx);
- return ret;
-}
-
-/*
- * Add kernel context to tracer.
- */
-int context_kernel_add(struct ltt_kernel_session *ksession,
- struct lttng_event_context *ctx, char *event_name,
- char *channel_name)
-{
- int ret;
- struct ltt_kernel_channel *kchan;
- struct lttng_kernel_context kctx;
-
- /* 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;
- break;
- case LTTNG_EVENT_CONTEXT_PROCNAME:
- kctx.ctx = LTTNG_KERNEL_CONTEXT_PROCNAME;
- break;
- case LTTNG_EVENT_CONTEXT_PRIO:
- kctx.ctx = LTTNG_KERNEL_CONTEXT_PRIO;
- break;
- case LTTNG_EVENT_CONTEXT_NICE:
- kctx.ctx = LTTNG_KERNEL_CONTEXT_NICE;
- break;
- case LTTNG_EVENT_CONTEXT_VPID:
- kctx.ctx = LTTNG_KERNEL_CONTEXT_VPID;
- break;
- case LTTNG_EVENT_CONTEXT_TID:
- kctx.ctx = LTTNG_KERNEL_CONTEXT_TID;
- break;
- case LTTNG_EVENT_CONTEXT_VTID:
- kctx.ctx = LTTNG_KERNEL_CONTEXT_VTID;
- break;
- case LTTNG_EVENT_CONTEXT_PPID:
- kctx.ctx = LTTNG_KERNEL_CONTEXT_PPID;
- break;
- case LTTNG_EVENT_CONTEXT_VPPID:
- kctx.ctx = LTTNG_KERNEL_CONTEXT_VPPID;
- break;
- default:
- return LTTCOMM_KERN_CONTEXT_FAIL;
- }
-
- 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,
- LTTNG_SYMBOL_NAME_LEN);
- kctx.u.perf_counter.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
-
- if (strlen(channel_name) == 0) {
- ret = add_kctx_all_channels(ksession, &kctx, event_name);
- if (ret != LTTCOMM_OK) {
- goto error;
- }
- } else {
- /* Get kernel channel */
- kchan = trace_kernel_get_channel_by_name(channel_name, ksession);
- if (kchan == NULL) {
- ret = LTTCOMM_KERN_CHAN_NOT_FOUND;
- goto error;
- }
-
- ret = add_kctx_to_channel(&kctx, kchan, event_name);
- if (ret != LTTCOMM_OK) {
- goto error;
- }
- }
-
- ret = LTTCOMM_OK;
-
-error:
- return ret;
-}
-
-/*
- * Add UST context to tracer.
- */
-int context_ust_add(struct ltt_ust_session *usess, int domain,
- struct lttng_event_context *ctx, char *event_name,
- char *channel_name)
-{
- int ret = LTTCOMM_OK, have_event = 0, no_chan = 1;
- struct lttng_ht_iter iter;
- struct lttng_ht *chan_ht;
- struct ltt_ust_channel *uchan = NULL;
- struct ltt_ust_event *uevent = NULL;
-
- /*
- * Define which channel's hashtable to use from the domain or quit if
- * unknown domain.
- */
- switch (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 = LTTCOMM_UND;
- goto error;
- }
-
- /* Do we have an event name */
- if (strlen(event_name) != 0) {
- have_event = 1;
- }
-
- /* Get UST channel if defined */
- if (strlen(channel_name) != 0) {
- uchan = trace_ust_find_channel_by_name(chan_ht, channel_name);
- if (uchan == NULL) {
- ret = LTTCOMM_UST_CHAN_NOT_FOUND;
- goto error;
- }
- }
-
- /* If UST channel specified and event name, get UST event ref */
- if (uchan && have_event) {
- uevent = trace_ust_find_event_by_name(uchan->events, event_name);
- if (uevent == NULL) {
- ret = LTTCOMM_UST_EVENT_NOT_FOUND;
- goto error;
- }
- }
-
- /* At this point, we have 4 possibilities */
-
- if (uchan && uevent) { /* Add ctx to event in channel */
- ret = add_uctx_to_event(usess, domain, uchan, uevent, ctx);
- } else if (uchan && !have_event) { /* Add ctx to channel */
- ret = add_uctx_to_channel(usess, domain, uchan, ctx);
- } else if (!uchan && have_event) { /* Add ctx to event */
- /* Add context to event without having the channel name */
- cds_lfht_for_each_entry(chan_ht->ht, &iter.iter, uchan, node.node) {
- uevent = trace_ust_find_event_by_name(uchan->events, event_name);
- if (uevent != NULL) {
- ret = add_uctx_to_event(usess, domain, uchan, uevent, ctx);
- /*
- * LTTng UST does not allowed the same event to be registered
- * multiple time in different or the same channel. So, if we
- * found our event, we stop.
- */
- goto end;
- }
- }
- ret = LTTCOMM_UST_EVENT_NOT_FOUND;
- goto error;
- } else if (!uchan && !have_event) { /* Add ctx all events, all channels */
- /* For all channels */
- cds_lfht_for_each_entry(chan_ht->ht, &iter.iter, uchan, node.node) {
- no_chan = 0;
- ret = add_uctx_to_channel(usess, domain, uchan, ctx);
- if (ret < 0) {
- ERR("Context failed for channel %s", uchan->name);
- continue;
- }
- }
- }
-
-end:
- switch (ret) {
- case -EEXIST:
- ret = LTTCOMM_UST_CONTEXT_EXIST;
- break;
- case -ENOMEM:
- ret = LTTCOMM_FATAL;
- break;
- case -EINVAL:
- ret = LTTCOMM_UST_CONTEXT_INVAL;
- break;
- case -ENOSYS:
- ret = LTTCOMM_UNKNOWN_DOMAIN;
- break;
- default:
- ret = LTTCOMM_OK;
- break;
- }
-
-error:
- return ret;
-}
projects / lttng-tools.git / blobdiff