+++ /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; either version 2
- * of the License, or (at your option) any later version.
- *
- * 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 "cmd.h"
-#include "conf.h"
-#include "utils.h"
-
-static char *opt_event_list;
-static int opt_event_type;
-static char *opt_kernel;
-static char *opt_cmd_name;
-static char *opt_session_name;
-static int opt_pid_all;
-static int opt_userspace;
-static int opt_enable_all;
-static pid_t opt_pid;
-static char *opt_kprobe;
-static char *opt_function_symbol;
-static char *opt_channel_name;
-
-enum {
- OPT_HELP = 1,
- OPT_USERSPACE,
- OPT_TRACEPOINT,
- OPT_MARKER,
- OPT_KPROBE,
- OPT_FUNCTION,
-};
-
-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},
- {"all-events", 'a', POPT_ARG_VAL, &opt_enable_all, 1, 0, 0},
- {"channel", 'c', POPT_ARG_STRING, &opt_channel_name, 0, 0, 0},
- {"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0},
- {"userspace", 'u', POPT_ARG_STRING | POPT_ARGFLAG_OPTIONAL, 0, OPT_USERSPACE, 0, 0},
- {"all", 0, POPT_ARG_VAL, &opt_pid_all, 1, 0, 0},
- {"pid", 'p', POPT_ARG_INT, &opt_pid, 0, 0, 0},
- {"tracepoint", 0, POPT_ARG_NONE, 0, OPT_TRACEPOINT, 0, 0},
- {"marker", 0, POPT_ARG_NONE, 0, OPT_MARKER, 0, 0},
- {"kprobe", 0, POPT_ARG_STRING, 0, OPT_KPROBE, 0, 0},
- {"function", 0, POPT_ARG_STRING, 0, OPT_FUNCTION, 0, 0},
- {0, 0, 0, 0, 0, 0, 0}
-};
-
-/*
- * usage
- */
-static void usage(FILE *ofp)
-{
- fprintf(ofp, "usage: lttng enable-event NAME[,NAME2,...] [options] [event_options]\n");
- fprintf(ofp, "\n");
- fprintf(ofp, " -h, --help Show this help\n");
- fprintf(ofp, " -s, --session Apply on session name\n");
- fprintf(ofp, " -c, --channel Apply on this channel\n");
- fprintf(ofp, " -a, --all-events Enable all tracepoints\n");
- fprintf(ofp, " -k, --kernel Apply for the kernel tracer\n");
- fprintf(ofp, " -u, --userspace [CMD] Apply for the user-space tracer\n");
- fprintf(ofp, " --all If -u, apply on all traceable apps\n");
- fprintf(ofp, " -p, --pid PID If -u, apply on a specific PID\n");
- fprintf(ofp, "\n");
- fprintf(ofp, "Event options:\n");
- fprintf(ofp, " --tracepoint Tracepoint event (default)\n");
- fprintf(ofp, " --kprobe [addr | symbol+offset]\n");
- fprintf(ofp, " Kernel Kprobe. (addr or offset can be base 8,10 and 16)\n");
- fprintf(ofp, " --function SYMBOL Function tracer event\n");
- fprintf(ofp, " --marker User-space marker (deprecated)\n");
- fprintf(ofp, "\n");
-}
-
-/*
- * parse_kprobe_addr
- *
- * Parse kprobe options.
- */
-static int parse_kprobe_opts(struct lttng_event *ev, char *opt)
-{
- int ret;
- uint64_t hex;
- char name[LTTNG_SYMBOL_NAME_LEN];
-
- if (opt == NULL) {
- ret = -1;
- goto error;
- }
-
- /* Check for symbol+offset */
- ret = sscanf(opt, "%[^'+']+%li", name, &hex);
- if (ret == 2) {
- strncpy(ev->attr.kprobe.symbol_name, name, LTTNG_SYMBOL_NAME_LEN);
- DBG("kprobe symbol %s", ev->attr.kprobe.symbol_name);
- if (hex == 0) {
- ERR("Invalid kprobe offset %lu", hex);
- ret = -1;
- goto error;
- }
- ev->attr.kprobe.offset = hex;
- DBG("kprobe offset %lu", ev->attr.kprobe.offset);
- goto error;
- }
-
- /* Check for address */
- ret = sscanf(opt, "%li", &hex);
- if (ret > 0) {
- if (hex == 0) {
- ERR("Invalid kprobe address %lu", hex);
- ret = -1;
- goto error;
- }
- ev->attr.kprobe.addr = hex;
- DBG("kprobe addr %lu", ev->attr.kprobe.addr);
- goto error;
- }
-
- /* No match */
- ret = -1;
-
-error:
- return ret;
-}
-
-/*
- * enable_events
- *
- * Enabling event using the lttng API.
- */
-static int enable_events(void)
-{
- int err, ret = CMD_SUCCESS;
- char *event_name, *channel_name = NULL;
- struct lttng_event ev;
-
- if (set_session_name(opt_session_name) < 0) {
- ret = CMD_ERROR;
- goto error;
- }
-
- if (opt_channel_name == NULL) {
- err = asprintf(&channel_name, DEFAULT_CHANNEL_NAME);
- if (err < 0) {
- ret = CMD_FATAL;
- goto error;
- }
- } else {
- channel_name = opt_channel_name;
- }
-
- if (opt_enable_all) {
- if (opt_kernel) {
- ret = lttng_kernel_enable_event(NULL, channel_name);
- goto error;
- }
-
- /* TODO: User-space tracer */
- }
-
- /* Strip event list */
- event_name = strtok(opt_event_list, ",");
- while (event_name != NULL) {
- /* Kernel tracer action */
- if (opt_kernel) {
- DBG("Enabling kernel event %s for channel %s",
- event_name, channel_name);
- /* Copy name and type of the event */
- strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
- ev.type = opt_event_type;
-
- switch (opt_event_type) {
- case LTTNG_EVENT_TRACEPOINTS:
- ret = lttng_kernel_enable_event(&ev, channel_name);
- break;
- case LTTNG_EVENT_KPROBES:
- ret = parse_kprobe_opts(&ev, opt_kprobe);
- if (ret < 0) {
- ERR("Unable to parse kprobe options");
- ret = 0;
- goto error;
- }
-
- ret = lttng_kernel_enable_event(&ev, channel_name);
- break;
- case LTTNG_EVENT_FUNCTION:
- strncpy(ev.attr.ftrace.symbol_name, opt_function_symbol, LTTNG_SYMBOL_NAME_LEN);
- ret = lttng_kernel_enable_event(&ev, channel_name);
- break;
- default:
- ret = CMD_NOT_IMPLEMENTED;
- goto error;
- }
-
- if (ret > 0) {
- MSG("Kernel event %s created in channel %s", event_name, channel_name);
- }
- } else if (opt_userspace) { /* User-space tracer action */
- /*
- * TODO: Waiting on lttng UST 2.0
- */
- if (opt_pid_all) {
- } else if (opt_pid != 0) {
- }
- ret = CMD_NOT_IMPLEMENTED;
- goto error;
- } else {
- ERR("Please specify a tracer (kernel or user-space)");
- goto error;
- }
-
- /* Next event */
- event_name = strtok(NULL, ",");
- }
-
-error:
- if (opt_channel_name == NULL) {
- free(channel_name);
- }
- return ret;
-}
-
-/*
- * cmd_enable_events
- *
- * Add event to trace session
- */
-int cmd_enable_events(int argc, const char **argv)
-{
- int opt, ret;
- static poptContext pc;
-
- pc = poptGetContext(NULL, argc, argv, long_options, 0);
- poptReadDefaultConfig(pc, 0);
-
- /* Default event type */
- opt_event_type = LTTNG_KERNEL_TRACEPOINTS;
-
- while ((opt = poptGetNextOpt(pc)) != -1) {
- switch (opt) {
- case OPT_HELP:
- usage(stderr);
- ret = CMD_SUCCESS;
- goto end;
- case OPT_USERSPACE:
- opt_userspace = 1;
- opt_cmd_name = poptGetOptArg(pc);
- break;
- case OPT_TRACEPOINT:
- opt_event_type = LTTNG_EVENT_TRACEPOINTS;
- break;
- case OPT_MARKER:
- ret = CMD_NOT_IMPLEMENTED;
- goto end;
- case OPT_KPROBE:
- opt_event_type = LTTNG_EVENT_KPROBES;
- opt_kprobe = poptGetOptArg(pc);
- break;
- case OPT_FUNCTION:
- opt_event_type = LTTNG_EVENT_FUNCTION;
- opt_function_symbol = poptGetOptArg(pc);
- break;
- default:
- usage(stderr);
- ret = CMD_UNDEFINED;
- goto end;
- }
- }
-
- opt_event_list = (char*) poptGetArg(pc);
- if (opt_event_list == NULL && opt_enable_all == 0) {
- ERR("Missing event name(s).\n");
- usage(stderr);
- ret = CMD_SUCCESS;
- goto end;
- }
-
- ret = enable_events();
-
-end:
- return ret;
-}
projects / lttng-tools.git / blobdiff