+++ /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 <ctype.h>
-
-#include "../cmd.h"
-#include "../conf.h"
-#include "../utils.h"
-
-static char *opt_event_list;
-static int opt_event_type;
-static int opt_kernel;
-static char *opt_session_name;
-static int opt_userspace;
-static char *opt_cmd_name;
-static int opt_enable_all;
-static pid_t opt_pid;
-static char *opt_probe;
-static char *opt_function;
-static char *opt_function_entry_symbol;
-static char *opt_channel_name;
-
-enum {
- OPT_HELP = 1,
- OPT_TRACEPOINT,
- OPT_PROBE,
- OPT_FUNCTION,
- OPT_FUNCTION_ENTRY,
- OPT_SYSCALL,
- OPT_USERSPACE,
- OPT_TRACEPOINT_LOGLEVEL,
-};
-
-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},
- {"all", '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, &opt_cmd_name, OPT_USERSPACE, 0, 0},
- {"pid", 'p', POPT_ARG_INT, &opt_pid, 0, 0, 0},
- {"tracepoint", 0, POPT_ARG_NONE, 0, OPT_TRACEPOINT, 0, 0},
- {"probe", 0, POPT_ARG_STRING, &opt_probe, OPT_PROBE, 0, 0},
- {"function", 0, POPT_ARG_STRING, &opt_function, OPT_FUNCTION, 0, 0},
-#if 0
- /*
- * Currently removed from lttng kernel tracer. Removed from
- * lttng UI to discourage its use.
- */
- {"function:entry", 0, POPT_ARG_STRING, &opt_function_entry_symbol, OPT_FUNCTION_ENTRY, 0, 0},
-#endif
- {"syscall", 0, POPT_ARG_NONE, 0, OPT_SYSCALL, 0, 0},
- {"loglevel", 0, POPT_ARG_NONE, 0, OPT_TRACEPOINT_LOGLEVEL, 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 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, " 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, "Event options:\n");
- fprintf(ofp, " --tracepoint Tracepoint event (default)\n");
- fprintf(ofp, " - userspace tracer supports wildcards at end of string.\n");
- fprintf(ofp, " Don't forget to quote to deal with bash expansion.\n");
- fprintf(ofp, " e.g.:\n");
- fprintf(ofp, " \"*\"\n");
- fprintf(ofp, " \"app_component:na*\"\n");
- fprintf(ofp, " --loglevel Tracepoint loglevel\n");
- fprintf(ofp, " --probe [addr | symbol | symbol+offset]\n");
- fprintf(ofp, " Dynamic probe.\n");
- fprintf(ofp, " Addr and offset can be octal (0NNN...),\n");
- fprintf(ofp, " decimal (NNN...) or hexadecimal (0xNNN...)\n");
- fprintf(ofp, " --function [addr | symbol | symbol+offset]\n");
- fprintf(ofp, " Dynamic function entry/return probe.\n");
- fprintf(ofp, " Addr and offset can be octal (0NNN...),\n");
- fprintf(ofp, " decimal (NNN...) or hexadecimal (0xNNN...)\n");
-#if 0
- fprintf(ofp, " --function:entry symbol\n");
- fprintf(ofp, " Function tracer event\n");
-#endif
- fprintf(ofp, " --syscall System call event\n");
- fprintf(ofp, "\n");
-}
-
-/*
- * Parse probe options.
- */
-static int parse_probe_opts(struct lttng_event *ev, char *opt)
-{
- int ret;
- char s_hex[19];
- char name[LTTNG_SYMBOL_NAME_LEN];
-
- if (opt == NULL) {
- ret = -1;
- goto end;
- }
-
- /* Check for symbol+offset */
- ret = sscanf(opt, "%[^'+']+%s", name, s_hex);
- if (ret == 2) {
- strncpy(ev->attr.probe.symbol_name, name, LTTNG_SYMBOL_NAME_LEN);
- ev->attr.probe.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
- DBG("probe symbol %s", ev->attr.probe.symbol_name);
- if (strlen(s_hex) == 0) {
- ERR("Invalid probe offset %s", s_hex);
- ret = -1;
- goto end;
- }
- ev->attr.probe.offset = strtoul(s_hex, NULL, 0);
- DBG("probe offset %" PRIu64, ev->attr.probe.offset);
- ev->attr.probe.addr = 0;
- goto end;
- }
-
- /* Check for symbol */
- if (isalpha(name[0])) {
- ret = sscanf(opt, "%s", name);
- if (ret == 1) {
- strncpy(ev->attr.probe.symbol_name, name, LTTNG_SYMBOL_NAME_LEN);
- ev->attr.probe.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
- DBG("probe symbol %s", ev->attr.probe.symbol_name);
- ev->attr.probe.offset = 0;
- DBG("probe offset %" PRIu64, ev->attr.probe.offset);
- ev->attr.probe.addr = 0;
- goto end;
- }
- }
-
- /* Check for address */
- ret = sscanf(opt, "%s", s_hex);
- if (ret > 0) {
- if (strlen(s_hex) == 0) {
- ERR("Invalid probe address %s", s_hex);
- ret = -1;
- goto end;
- }
- ev->attr.probe.addr = strtoul(s_hex, NULL, 0);
- DBG("probe addr %" PRIu64, ev->attr.probe.addr);
- ev->attr.probe.offset = 0;
- memset(ev->attr.probe.symbol_name, 0, LTTNG_SYMBOL_NAME_LEN);
- goto end;
- }
-
- /* No match */
- ret = -1;
-
-end:
- return ret;
-}
-
-/*
- * Enabling event using the lttng API.
- */
-static int enable_events(char *session_name)
-{
- int err, ret = CMD_SUCCESS;
- char *event_name, *channel_name = NULL;
- struct lttng_event ev;
- struct lttng_domain dom;
-
- 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_kernel && opt_userspace) {
- ERR("Can't use -k/--kernel and -u/--userspace together");
- ret = CMD_FATAL;
- goto error;
- }
-
- /* Create lttng domain */
- 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;
- }
-
- handle = lttng_create_handle(session_name, &dom);
- if (handle == NULL) {
- ret = -1;
- goto error;
- }
-
- if (opt_enable_all) {
- /* Default setup for enable all */
-
- if (opt_kernel) {
- ev.type = opt_event_type;
- ev.name[0] = '\0';
- } else {
- ev.type = LTTNG_EVENT_TRACEPOINT;
- strcpy(ev.name, "*");
- }
-
- ret = lttng_enable_event(handle, &ev, channel_name);
- if (ret < 0) {
- goto error;
- }
-
- switch (opt_event_type) {
- case LTTNG_EVENT_TRACEPOINT:
- MSG("All %s tracepoints are enabled in channel %s",
- opt_kernel ? "kernel" : "UST", channel_name);
- break;
- case LTTNG_EVENT_SYSCALL:
- if (opt_kernel) {
- MSG("All kernel system calls are enabled in channel %s",
- channel_name);
- }
- break;
- case LTTNG_EVENT_ALL:
- MSG("All %s events are enabled in channel %s",
- opt_kernel ? "kernel" : "UST", channel_name);
- break;
- default:
- /*
- * We should not be here since lttng_enable_event should have
- * failed on the event type.
- */
- goto error;
- }
- goto end;
- }
-
- /* Strip event list */
- event_name = strtok(opt_event_list, ",");
- while (event_name != NULL) {
- /* Copy name and type of the event */
- strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
- ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
- ev.type = opt_event_type;
-
- /* Kernel tracer action */
- if (opt_kernel) {
- DBG("Enabling kernel event %s for channel %s",
- event_name, channel_name);
-
- switch (opt_event_type) {
- case LTTNG_EVENT_ALL: /* Default behavior is tracepoint */
- ev.type = LTTNG_EVENT_TRACEPOINT;
- /* Fall-through */
- case LTTNG_EVENT_TRACEPOINT:
- break;
- case LTTNG_EVENT_PROBE:
- ret = parse_probe_opts(&ev, opt_probe);
- if (ret < 0) {
- ERR("Unable to parse probe options");
- ret = 0;
- goto error;
- }
- break;
- case LTTNG_EVENT_FUNCTION:
- ret = parse_probe_opts(&ev, opt_function);
- if (ret < 0) {
- ERR("Unable to parse function probe options");
- ret = 0;
- goto error;
- }
- break;
- case LTTNG_EVENT_FUNCTION_ENTRY:
- strncpy(ev.attr.ftrace.symbol_name, opt_function_entry_symbol,
- LTTNG_SYMBOL_NAME_LEN);
- ev.attr.ftrace.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
- break;
- case LTTNG_EVENT_SYSCALL:
- MSG("per-syscall selection not supported yet. Use \"-a\" "
- "for all syscalls.");
- default:
- ret = CMD_NOT_IMPLEMENTED;
- goto error;
- }
- } else if (opt_userspace) { /* User-space tracer action */
- if (opt_cmd_name != NULL || opt_pid) {
- MSG("Only supporting tracing all UST processes (-u) for now.");
- ret = CMD_NOT_IMPLEMENTED;
- goto error;
- }
-
- DBG("Enabling UST event %s for channel %s", event_name,
- channel_name);
-
- switch (opt_event_type) {
- case LTTNG_EVENT_ALL: /* Default behavior is tracepoint */
- /* Fall-through */
- case LTTNG_EVENT_TRACEPOINT:
- /* Copy name and type of the event */
- ev.type = LTTNG_EVENT_TRACEPOINT;
- strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
- ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
- break;
- case LTTNG_EVENT_TRACEPOINT_LOGLEVEL:
- /* Copy name and type of the event */
- ev.type = LTTNG_EVENT_TRACEPOINT_LOGLEVEL;
- strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
- ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
- break;
- case LTTNG_EVENT_PROBE:
- case LTTNG_EVENT_FUNCTION:
- case LTTNG_EVENT_FUNCTION_ENTRY:
- case LTTNG_EVENT_SYSCALL:
- default:
- ret = CMD_NOT_IMPLEMENTED;
- goto error;
- }
- } else {
- ERR("Please specify a tracer (-k/--kernel or -u/--userspace)");
- goto error;
- }
-
- ret = lttng_enable_event(handle, &ev, channel_name);
- if (ret == 0) {
- MSG("%s event %s created in channel %s",
- opt_kernel ? "kernel": "UST", event_name, channel_name);
- }
-
- /* Next event */
- event_name = strtok(NULL, ",");
- }
-
-end:
-error:
- if (opt_channel_name == NULL) {
- free(channel_name);
- }
- lttng_destroy_handle(handle);
-
- return ret;
-}
-
-/*
- * Add event to trace session
- */
-int cmd_enable_events(int argc, const char **argv)
-{
- int opt, ret;
- static poptContext pc;
- char *session_name = NULL;
-
- pc = poptGetContext(NULL, argc, argv, long_options, 0);
- poptReadDefaultConfig(pc, 0);
-
- /* Default event type */
- opt_event_type = LTTNG_EVENT_ALL;
-
- while ((opt = poptGetNextOpt(pc)) != -1) {
- switch (opt) {
- case OPT_HELP:
- usage(stderr);
- ret = CMD_SUCCESS;
- goto end;
- case OPT_TRACEPOINT:
- opt_event_type = LTTNG_EVENT_TRACEPOINT;
- break;
- case OPT_PROBE:
- opt_event_type = LTTNG_EVENT_PROBE;
- break;
- case OPT_FUNCTION:
- opt_event_type = LTTNG_EVENT_FUNCTION;
- break;
- case OPT_FUNCTION_ENTRY:
- opt_event_type = LTTNG_EVENT_FUNCTION_ENTRY;
- break;
- case OPT_SYSCALL:
- opt_event_type = LTTNG_EVENT_SYSCALL;
- break;
- case OPT_USERSPACE:
- opt_userspace = 1;
- break;
- case OPT_TRACEPOINT_LOGLEVEL:
- opt_event_type = LTTNG_EVENT_TRACEPOINT_LOGLEVEL;
- 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;
- }
-
- 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_events(session_name);
-
-end:
- if (opt_session_name == NULL) {
- free(session_name);
- }
-
- return ret;
-}
projects / lttng-tools.git / blobdiff