+++ /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 <popt.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <unistd.h>
-#include <inttypes.h>
-
-#include "../cmd.h"
-#include "../conf.h"
-#include "../utils.h"
-
-static char *opt_channels;
-static int opt_kernel;
-static char *opt_cmd_name;
-static char *opt_session_name;
-static int opt_userspace;
-static char *opt_cmd_name;
-static pid_t opt_pid;
-static struct lttng_channel chan;
-
-enum {
- OPT_HELP = 1,
- OPT_DISCARD,
- OPT_OVERWRITE,
- OPT_SUBBUF_SIZE,
- OPT_NUM_SUBBUF,
- OPT_SWITCH_TIMER,
- OPT_READ_TIMER,
- OPT_USERSPACE,
-};
-
-static struct lttng_handle *handle;
-
-static struct poptOption long_options[] = {
- /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
- {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
- {"session", 's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0},
- {"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0},
- {"userspace", 'u', POPT_ARG_STRING | POPT_ARGFLAG_OPTIONAL, &opt_cmd_name, OPT_USERSPACE, 0, 0},
- {"pid", 'p', POPT_ARG_INT, &opt_pid, 0, 0, 0},
- {"discard", 0, POPT_ARG_NONE, 0, OPT_DISCARD, 0, 0},
- {"overwrite", 0, POPT_ARG_NONE, 0, OPT_OVERWRITE, 0, 0},
- {"subbuf-size", 0, POPT_ARG_DOUBLE, 0, OPT_SUBBUF_SIZE, 0, 0},
- {"num-subbuf", 0, POPT_ARG_INT, 0, OPT_NUM_SUBBUF, 0, 0},
- {"switch-timer", 0, POPT_ARG_INT, 0, OPT_SWITCH_TIMER, 0, 0},
- {"read-timer", 0, POPT_ARG_INT, 0, OPT_READ_TIMER, 0, 0},
- {0, 0, 0, 0, 0, 0, 0}
-};
-
-/*
- * usage
- */
-static void usage(FILE *ofp)
-{
- fprintf(ofp, "usage: lttng enable-channel NAME[,NAME2,...] [options] [channel_options]\n");
- fprintf(ofp, "\n");
- fprintf(ofp, " -h, --help Show this help\n");
- fprintf(ofp, " -s, --session Apply on session name\n");
- fprintf(ofp, " -k, --kernel Apply on the kernel tracer\n");
- fprintf(ofp, " -u, --userspace [CMD] Apply for the user-space tracer\n");
- fprintf(ofp, " If no CMD, the domain used is UST global\n");
- fprintf(ofp, " or else the domain is UST EXEC_NAME\n");
- fprintf(ofp, " -p, --pid PID If -u, apply to specific PID (domain: UST PID)\n");
- fprintf(ofp, "\n");
- fprintf(ofp, "Channel options:\n");
- fprintf(ofp, " --discard Discard event when buffers are full%s\n",
- DEFAULT_CHANNEL_OVERWRITE ? "" : " (default)");
- fprintf(ofp, " --overwrite Flight recorder mode%s\n",
- DEFAULT_CHANNEL_OVERWRITE ? " (default)" : "");
- fprintf(ofp, " --subbuf-size Subbuffer size in bytes\n");
- fprintf(ofp, " (default: %u, kernel default: %u)\n",
- DEFAULT_CHANNEL_SUBBUF_SIZE,
- DEFAULT_KERNEL_CHANNEL_SUBBUF_SIZE);
- fprintf(ofp, " --num-subbuf Number of subbufers\n");
- fprintf(ofp, " (default: %u, kernel default: %u)\n",
- DEFAULT_CHANNEL_SUBBUF_NUM,
- DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM);
- fprintf(ofp, " --switch-timer Switch timer interval in usec (default: %u)\n",
- DEFAULT_CHANNEL_SWITCH_TIMER);
- fprintf(ofp, " --read-timer Read timer interval in usec (default: %u)\n",
- DEFAULT_CHANNEL_READ_TIMER);
- fprintf(ofp, "\n");
-}
-
-/*
- * Set default attributes depending on those already defined from the command
- * line.
- */
-static void set_default_attr(struct lttng_domain *dom)
-{
- struct lttng_channel_attr default_attr;
-
- /* Set attributes */
- lttng_channel_set_default_attr(dom, &default_attr);
-
- if (chan.attr.overwrite == -1) {
- chan.attr.overwrite = default_attr.overwrite;
- }
- if (chan.attr.subbuf_size == -1) {
- chan.attr.subbuf_size = default_attr.subbuf_size;
- }
- if (chan.attr.num_subbuf == -1) {
- chan.attr.num_subbuf = default_attr.num_subbuf;
- }
- if (chan.attr.switch_timer_interval == -1) {
- chan.attr.switch_timer_interval = default_attr.switch_timer_interval;
- }
- if (chan.attr.read_timer_interval == -1) {
- chan.attr.read_timer_interval = default_attr.read_timer_interval;
- }
- if (chan.attr.output == -1) {
- chan.attr.output = default_attr.output;
- }
-}
-
-/*
- * Adding channel using the lttng API.
- */
-static int enable_channel(char *session_name)
-{
- int ret = CMD_SUCCESS;
- char *channel_name;
- struct lttng_domain dom;
-
- if (opt_kernel) {
- dom.type = LTTNG_DOMAIN_KERNEL;
- } else if (opt_pid != 0) {
- dom.type = LTTNG_DOMAIN_UST_PID;
- dom.attr.pid = opt_pid;
- DBG("PID %d set to lttng handle", opt_pid);
- } else if (opt_userspace && opt_cmd_name == NULL) {
- dom.type = LTTNG_DOMAIN_UST;
- } else if (opt_userspace && opt_cmd_name != NULL) {
- dom.type = LTTNG_DOMAIN_UST_EXEC_NAME;
- strncpy(dom.attr.exec_name, opt_cmd_name, NAME_MAX);
- } else {
- ERR("Please specify a tracer (-k/--kernel or -u/--userspace)");
- ret = CMD_NOT_IMPLEMENTED;
- goto error;
- }
-
- set_default_attr(&dom);
-
- handle = lttng_create_handle(session_name, &dom);
- if (handle == NULL) {
- ret = -1;
- goto error;
- }
-
- /* Strip channel list (format: chan1,chan2,...) */
- channel_name = strtok(opt_channels, ",");
- while (channel_name != NULL) {
- /* Copy channel name and normalize it */
- strncpy(chan.name, channel_name, NAME_MAX);
- chan.name[NAME_MAX - 1] = '\0';
-
- DBG("Enabling channel %s", channel_name);
-
- ret = lttng_enable_channel(handle, &chan);
- if (ret < 0) {
- goto error;
- } else {
- MSG("%s channel %s enabled for session %s",
- opt_kernel ? "Kernel" : "UST", channel_name,
- session_name);
- }
-
- /* Next event */
- channel_name = strtok(NULL, ",");
- }
-
-error:
- lttng_destroy_handle(handle);
-
- return ret;
-}
-
-/*
- * Default value for channel configuration.
- */
-static void init_channel_config(void)
-{
- /*
- * Put -1 everywhere so we can identify those set by the command line and
- * those needed to be set by the default values.
- */
- memset(&chan.attr, -1, sizeof(chan.attr));
-}
-
-/*
- * Add channel to trace session
- */
-int cmd_enable_channels(int argc, const char **argv)
-{
- int opt, ret;
- static poptContext pc;
- char *session_name = NULL;
-
- init_channel_config();
-
- pc = poptGetContext(NULL, argc, argv, long_options, 0);
- poptReadDefaultConfig(pc, 0);
-
- while ((opt = poptGetNextOpt(pc)) != -1) {
- switch (opt) {
- case OPT_HELP:
- usage(stderr);
- ret = CMD_SUCCESS;
- goto end;
- case OPT_DISCARD:
- chan.attr.overwrite = 0;
- DBG("Channel set to discard");
- break;
- case OPT_OVERWRITE:
- chan.attr.overwrite = 1;
- DBG("Channel set to overwrite");
- break;
- case OPT_SUBBUF_SIZE:
- chan.attr.subbuf_size = atol(poptGetOptArg(pc));
- DBG("Channel subbuf size set to %" PRIu64, chan.attr.subbuf_size);
- break;
- case OPT_NUM_SUBBUF:
- chan.attr.num_subbuf = atoi(poptGetOptArg(pc));
- DBG("Channel subbuf num set to %" PRIu64, chan.attr.num_subbuf);
- break;
- case OPT_SWITCH_TIMER:
- chan.attr.switch_timer_interval = atoi(poptGetOptArg(pc));
- DBG("Channel switch timer interval set to %d", chan.attr.switch_timer_interval);
- break;
- case OPT_READ_TIMER:
- chan.attr.read_timer_interval = atoi(poptGetOptArg(pc));
- DBG("Channel read timer interval set to %d", chan.attr.read_timer_interval);
- break;
- case OPT_USERSPACE:
- opt_userspace = 1;
- break;
- default:
- usage(stderr);
- ret = CMD_UNDEFINED;
- goto end;
- }
- }
-
- opt_channels = (char*) poptGetArg(pc);
- if (opt_channels == NULL) {
- ERR("Missing channel name.\n");
- usage(stderr);
- ret = CMD_SUCCESS;
- goto end;
- }
-
- if (!opt_session_name) {
- session_name = get_session_name();
- if (session_name == NULL) {
- ret = -1;
- goto end;
- }
- } else {
- session_name = opt_session_name;
- }
-
- ret = enable_channel(session_name);
-
-end:
- return ret;
-}
projects / lttng-tools.git / blobdiff