X-Git-Url: https://git.lttng.org/?p=lttngtop.git;a=blobdiff_plain;f=src%2Flttngtop.c;h=d7bf627a702376fb952b04f7c3e9f113730cf0fa;hp=95bd383e6d8b4f4b8f8d5c11cfe114b7f16b5052;hb=a15e6a1039a885e137a08948593da8383777b6d5;hpb=06570214a7aa236670706a1aac01c3f352e7454d

diff --git a/src/lttngtop.c b/src/lttngtop.c
index 95bd383..d7bf627 100644
--- a/src/lttngtop.c
+++ b/src/lttngtop.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2011 Julien Desfossez
+ * Copyright (C) 2013 Julien Desfossez
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License Version 2 as
@@ -22,6 +22,7 @@
 #include <babeltrace/babeltrace.h>
 #include <babeltrace/ctf/events.h>
 #include <babeltrace/ctf/callbacks.h>
+#include <babeltrace/ctf/iterator.h>
 #include <fcntl.h>
 #include <pthread.h>
 #include <popt.h>
@@ -36,16 +37,34 @@
 #include <sys/types.h>
 #include <fts.h>
 #include <assert.h>
+#include <sys/mman.h>
+#include <sys/wait.h>
+#include <lttng/lttng.h>
+#ifdef LTTNGTOP_MMAP_LIVE
+#include <lttng/lttngtop-helper.h>
+#include <babeltrace/lttngtopmmappacketseek.h>
+#include "mmap-live.h"
+#endif /* LTTNGTOP_MMAP_LIVE */
 
 #include "lttngtoptypes.h"
 #include "cputop.h"
 #include "iostreamtop.h"
 #include "cursesdisplay.h"
 #include "common.h"
+#include "network-live.h"
+
+#define NET_URL_PREFIX	"net://"
+#define NET4_URL_PREFIX	"net4://"
+#define NET6_URL_PREFIX	"net6://"
 
 #define DEFAULT_FILE_ARRAY_SIZE 1
 
 const char *opt_input_path;
+int opt_textdump;
+int opt_child;
+int opt_begin;
+
+int quit = 0;
 
 struct lttngtop *copy;
 pthread_t display_thread;
@@ -53,28 +72,70 @@ pthread_t timer_thread;
 
 unsigned long refresh_display = 1 * NSEC_PER_SEC;
 unsigned long last_display_update = 0;
-int quit = 0;
+unsigned long last_event_ts = 0;
+
+/* list of FDs available for being read with snapshots */
+struct bt_mmap_stream_list mmap_list;
+GPtrArray *lttng_consumer_stream_array;
+int sessiond_metadata, consumerd_metadata;
+struct lttng_consumer_local_data *ctx = NULL;
+/* list of snapshots currently not consumed */
+GPtrArray *available_snapshots;
+sem_t metadata_available;
+int reload_trace = 0;
+
+uint64_t prev_ts = 0;
 
 enum {
 	OPT_NONE = 0,
 	OPT_HELP,
-	OPT_LIST,
-	OPT_VERBOSE,
-	OPT_DEBUG,
-	OPT_NAMES,
+	OPT_TEXTDUMP,
+	OPT_PID,
+	OPT_CHILD,
+	OPT_HOSTNAME,
+	OPT_RELAY_HOSTNAME,
+	OPT_KPROBES,
+	OPT_BEGIN,
 };
 
 static struct poptOption long_options[] = {
 	/* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
 	{ "help", 'h', POPT_ARG_NONE, NULL, OPT_HELP, NULL, NULL },
+	{ "textdump", 't', POPT_ARG_NONE, NULL, OPT_TEXTDUMP, NULL, NULL },
+	{ "child", 'f', POPT_ARG_NONE, NULL, OPT_CHILD, NULL, NULL },
+	{ "begin", 'b', POPT_ARG_NONE, NULL, OPT_BEGIN, NULL, NULL },
+	{ "pid", 'p', POPT_ARG_STRING, &opt_tid, OPT_PID, NULL, NULL },
+	{ "hostname", 'n', POPT_ARG_STRING, &opt_hostname, OPT_HOSTNAME, NULL, NULL },
+	{ "relay-hostname", 'r', POPT_ARG_STRING, &opt_relay_hostname,
+		OPT_RELAY_HOSTNAME, NULL, NULL },
+	{ "kprobes", 'k', POPT_ARG_STRING, &opt_kprobes, OPT_KPROBES, NULL, NULL },
 	{ NULL, 0, 0, NULL, 0, NULL, NULL },
 };
 
+#ifdef LTTNGTOP_MMAP_LIVE
+static void handle_textdump_sigterm(int signal)
+{
+	quit = 1;
+	lttng_destroy_session("test");
+}
+#endif
+
 void *refresh_thread(void *p)
 {
 	while (1) {
-		if (quit)
-			return NULL;
+		if (quit) {
+			sem_post(&pause_sem);
+			sem_post(&timer);
+			sem_post(&end_trace_sem);
+			sem_post(&goodtodisplay);
+			sem_post(&goodtoupdate);
+			pthread_exit(0);
+		}
+		if (!opt_input_path) {
+#ifdef LTTNGTOP_MMAP_LIVE 
+			mmap_live_flush(mmap_list);
+#endif
+		}
 		sem_wait(&pause_sem);
 		sem_post(&pause_sem);
 		sem_post(&timer);
@@ -87,6 +148,10 @@ void *ncurses_display(void *p)
 	unsigned int current_display_index = 0;
 
 	sem_wait(&bootstrap);
+	/*
+	 * Prevent the 1 second delay when we hit ESC
+	 */
+	ESCDELAY = 0;
 	init_ncurses();
 
 	while (1) {
@@ -94,18 +159,185 @@ void *ncurses_display(void *p)
 		sem_wait(&goodtodisplay);
 		sem_wait(&pause_sem);
 
+		if (quit) {
+			sem_post(&pause_sem);
+			sem_post(&timer);
+			reset_ncurses();
+			pthread_exit(0);
+		}
+
 		copy = g_ptr_array_index(copies, current_display_index);
 		assert(copy);
 		display(current_display_index++);
 
 		sem_post(&goodtoupdate);
 		sem_post(&pause_sem);
+	}
+}
 
-		if (quit) {
-			reset_ncurses();
-			pthread_exit(0);
+void print_fields(struct bt_ctf_event *event)
+{
+	unsigned int cnt, i;
+	const struct bt_definition *const * list;
+	const struct bt_declaration *l;
+	const struct bt_definition *scope;
+	enum ctf_type_id type;
+	const char *str;
+
+	scope = bt_ctf_get_top_level_scope(event, BT_EVENT_FIELDS);
+
+	bt_ctf_get_field_list(event, scope, &list, &cnt);
+	for (i = 0; i < cnt; i++) {
+		if (i != 0)
+			printf(", ");
+		printf("%s = ", bt_ctf_field_name(list[i]));
+		l = bt_ctf_get_decl_from_def(list[i]);
+		type = bt_ctf_field_type(l);
+		if (type == CTF_TYPE_INTEGER) {
+			if (bt_ctf_get_int_signedness(l) == 0)
+				printf("%" PRIu64 "", bt_ctf_get_uint64(list[i]));
+			else
+				printf("%" PRId64 "", bt_ctf_get_int64(list[i]));
+		} else if (type == CTF_TYPE_STRING) {
+			printf("%s", bt_ctf_get_string(list[i]));
+		} else if (type == CTF_TYPE_ARRAY) {
+			str = bt_ctf_get_char_array(list[i]);
+			if (!bt_ctf_field_get_error() && str)
+				printf("%s", str);
+		}
+	}
+}
+
+/*
+ * hook on each event to check the timestamp and refresh the display if
+ * necessary
+ */
+enum bt_cb_ret print_timestamp(struct bt_ctf_event *call_data, void *private_data)
+{
+	unsigned long timestamp;
+	uint64_t delta;
+	struct tm start;
+	uint64_t ts_nsec_start;
+	int pid, cpu_id, tid, ret, lookup;
+	const struct bt_definition *scope;
+	const char *hostname, *procname;
+	struct cputime *cpu;
+	char *from_syscall = NULL;
+
+	timestamp = bt_ctf_get_timestamp(call_data);
+
+	/* can happen in network live when tracing is idle */
+	if (timestamp < last_event_ts)
+		goto end_stop;
+
+	last_event_ts = timestamp;
+
+	start = format_timestamp(timestamp);
+	ts_nsec_start = timestamp % NSEC_PER_SEC;
+
+	pid = get_context_pid(call_data);
+	if (pid == -1ULL && opt_tid) {
+		goto error;
+	}
+
+	tid = get_context_tid(call_data);
+	
+	hostname = get_context_hostname(call_data);
+	if (opt_child)
+		lookup = pid;
+	else
+		lookup = tid;
+	if (opt_tid || opt_hostname || opt_exec_name) {
+		if (!lookup_filter_tid_list(lookup)) {
+			/* To display when a process of ours in getting scheduled in */
+			if (strcmp(bt_ctf_event_name(call_data), "sched_switch") == 0) {
+				int next_tid;
+
+				scope = bt_ctf_get_top_level_scope(call_data,
+						BT_EVENT_FIELDS);
+				next_tid = bt_ctf_get_int64(bt_ctf_get_field(call_data,
+							scope, "_next_tid"));
+				if (bt_ctf_field_get_error()) {
+					fprintf(stderr, "Missing next_tid field\n");
+					goto error;
+				}
+				if (!lookup_filter_tid_list(next_tid)) {
+					goto end;
+				}
+			} else {
+				goto end;
+			}
+		}
+	}
+
+	cpu_id = get_cpu_id(call_data);
+	procname = get_context_comm(call_data);
+	if (strncmp(bt_ctf_event_name(call_data), "sys_", 4) == 0) {
+		cpu = get_cpu(cpu_id);
+		cpu->current_syscall = g_new0(struct syscall, 1);
+		cpu->current_syscall->name = strdup(bt_ctf_event_name(call_data));
+		cpu->current_syscall->ts_start = timestamp;
+	} else if ((strncmp(bt_ctf_event_name(call_data), "exit_syscall", 12)) == 0) {
+		struct tm start_ts;
+
+		cpu = get_cpu(cpu_id);
+		if (cpu->current_syscall) {
+			delta = timestamp - cpu->current_syscall->ts_start;
+			start_ts = format_timestamp(cpu->current_syscall->ts_start);
+			ret = asprintf(&from_syscall, " [from %02d:%02d:%02d.%09" PRIu64
+					" (+%" PRIu64 ".%09" PRIu64 ") (cpu %d) %s]\n",
+					start_ts.tm_hour, start_ts.tm_min, start_ts.tm_sec,
+					cpu->current_syscall->ts_start % NSEC_PER_SEC,
+					delta / NSEC_PER_SEC, delta % NSEC_PER_SEC,
+					cpu_id, cpu->current_syscall->name);
+			if (ret < 0) {
+				goto error;
+			}
+			free(cpu->current_syscall->name);
+			g_free(cpu->current_syscall);
+			cpu->current_syscall = NULL;
+		}
+	}
+
+	if (prev_ts == 0)
+		prev_ts = timestamp;
+	delta = timestamp - prev_ts;
+	prev_ts = timestamp;
+
+	printf("%02d:%02d:%02d.%09" PRIu64 " (+%" PRIu64 ".%09" PRIu64 ") %s%s"
+			"(cpu %d) [%s (%d/%d)] %s (",
+			start.tm_hour, start.tm_min, start.tm_sec,
+			ts_nsec_start, delta / NSEC_PER_SEC,
+			delta % NSEC_PER_SEC, (hostname) ? hostname : "",
+			(hostname) ? " ": "", cpu_id, procname, pid, tid,
+			bt_ctf_event_name(call_data));
+	print_fields(call_data);
+	printf(")%s", (from_syscall) ? from_syscall : "\n");
+
+	free(from_syscall);
+
+end:
+	return BT_CB_OK;
+error:
+	return BT_CB_ERROR_STOP;
+end_stop:
+	return BT_CB_OK_STOP;
+}
+
+enum bt_cb_ret handle_kprobes(struct bt_ctf_event *call_data, void *private_data)
+{
+	int i;
+	struct kprobes *kprobe;
+
+	/* for kprobes */
+	for (i = 0; i < lttngtop.kprobes_table->len; i++) {
+		kprobe = g_ptr_array_index(lttngtop.kprobes_table, i);
+		if (strcmp(bt_ctf_event_name(call_data), kprobe->probe_name) == 0) {
+			kprobe->count++;
 		}
 	}
+
+	return BT_CB_OK;
 }
 
 /*
@@ -120,6 +352,12 @@ enum bt_cb_ret check_timestamp(struct bt_ctf_event *call_data, void *private_dat
 	if (timestamp == -1ULL)
 		goto error;
 
+	/* can happen in network live when tracing is idle */
+	if (timestamp < last_event_ts)
+		goto end_stop;
+
+	last_event_ts = timestamp;
+
 	if (last_display_update == 0)
 		last_display_update = timestamp;
 
@@ -136,6 +374,9 @@ enum bt_cb_ret check_timestamp(struct bt_ctf_event *call_data, void *private_dat
 error:
 	fprintf(stderr, "check_timestamp callback error\n");
 	return BT_CB_ERROR_STOP;
+
+end_stop:
+	return BT_CB_OK_STOP;
 }
 
 /*
@@ -145,7 +386,7 @@ error:
 struct perfcounter *get_perf_counter(const char *name, struct processtop *proc,
 		struct cputime *cpu)
 {
-	struct perfcounter *ret, *global;
+	struct perfcounter *ret;
 	GHashTable *table;
 
 	if (proc)
@@ -164,16 +405,6 @@ struct perfcounter *get_perf_counter(const char *name, struct processtop *proc,
 	ret->visible = 1;
 	g_hash_table_insert(table, (gpointer) strdup(name), ret);
 
-	global = g_hash_table_lookup(lttngtop.perf_list, (gpointer) name);
-	if (!global) {
-		global = g_new0(struct perfcounter, 1);
-		memcpy(global, ret, sizeof(struct perfcounter));
-		/* by default, sort on the first perf context */
-		if (g_hash_table_size(lttngtop.perf_list) == 0)
-			global->sort = 1;
-		g_hash_table_insert(lttngtop.perf_list, (gpointer) strdup(name), global);
-	}
-
 end:
 	return ret;
 
@@ -194,14 +425,18 @@ void update_perf_value(struct processtop *proc, struct cputime *cpu,
 	}
 }
 
-void extract_perf_counter_scope(struct bt_ctf_event *event,
-		struct definition *scope,
+void extract_perf_counter_scope(const struct bt_ctf_event *event,
+		const struct bt_definition *scope,
 		struct processtop *proc,
 		struct cputime *cpu)
 {
-	struct definition const * const *list = NULL;
+	struct bt_definition const * const *list = NULL;
+	const struct bt_definition *field;
 	unsigned int count;
-	int i, ret;
+	struct perfcounter *perfcounter;
+	GHashTableIter iter;
+	gpointer key;
+	int ret;
 
 	if (!scope)
 		goto end;
@@ -210,13 +445,17 @@ void extract_perf_counter_scope(struct bt_ctf_event *event,
 	if (ret < 0)
 		goto end;
 
-	for (i = 0; i < count; i++) {
-		const char *name = bt_ctf_field_name(list[i]);
-		if (strncmp(name, "perf_", 5) == 0) {
-			int value = bt_ctf_get_uint64(list[i]);
+	if (count == 0)
+		goto end;
+
+	g_hash_table_iter_init(&iter, global_perf_liszt);
+	while (g_hash_table_iter_next (&iter, &key, (gpointer) &perfcounter)) {
+		field = bt_ctf_get_field(event, scope, (char *) key);
+		if (field) {
+			int value = bt_ctf_get_uint64(field);
 			if (bt_ctf_field_get_error())
 				continue;
-			update_perf_value(proc, cpu, name, value);
+			update_perf_value(proc, cpu, (char *) key, value);
 		}
 	}
 
@@ -224,10 +463,10 @@ end:
 	return;
 }
 
-void update_perf_counter(struct processtop *proc, struct bt_ctf_event *event)
+void update_perf_counter(struct processtop *proc, const struct bt_ctf_event *event)
 {
 	struct cputime *cpu;
-	struct definition *scope;
+	const struct bt_definition *scope;
 
 	cpu = get_cpu(get_cpu_id(event));
 
@@ -244,50 +483,62 @@ void update_perf_counter(struct processtop *proc, struct bt_ctf_event *event)
 enum bt_cb_ret fix_process_table(struct bt_ctf_event *call_data,
 		void *private_data)
 {
-	int pid, tid, ppid;
-	char *comm;
+	int pid, tid, ppid, vpid, vtid, vppid;
+	char *comm, *hostname;
 	struct processtop *parent, *child;
 	unsigned long timestamp;
 
-	/* FIXME : display nice error when missing context pid, tid, ppid and comm */
-
 	timestamp = bt_ctf_get_timestamp(call_data);
 	if (timestamp == -1ULL)
 		goto error;
 
 	pid = get_context_pid(call_data);
 	if (pid == -1ULL) {
-//		fprintf(stderr, "Missing pid context info\n");
 		goto error;
 	}
+
 	tid = get_context_tid(call_data);
 	if (tid == -1ULL) {
-//		fprintf(stderr, "Missing tid context info\n");
 		goto error;
 	}
 	ppid = get_context_ppid(call_data);
 	if (ppid == -1ULL) {
-//		fprintf(stderr, "Missing ppid context info\n");
 		goto error;
 	}
+	vpid = get_context_vpid(call_data);
+	if (pid == -1ULL) {
+		vpid = -1;
+	}
+	vtid = get_context_vtid(call_data);
+	if (tid == -1ULL) {
+		vtid = -1;
+	}
+	vppid = get_context_vppid(call_data);
+	if (ppid == -1ULL) {
+		vppid = -1;
+	}
 	comm = get_context_comm(call_data);
 	if (!comm) {
-//		fprintf(stderr, "Missing procname context info\n");
 		goto error;
 	}
+	/* optional */
+	hostname = get_context_hostname(call_data);
 
 	/* find or create the current process */
 	child = find_process_tid(&lttngtop, tid, comm);
 	if (!child)
-		child = add_proc(&lttngtop, tid, comm, timestamp);
-	update_proc(child, pid, tid, ppid, comm);
+		child = add_proc(&lttngtop, tid, comm, timestamp, hostname);
+	if (!child)
+		goto end;
+	update_proc(child, pid, tid, ppid, vpid, vtid, vppid, comm, hostname);
 
 	if (pid != tid) {
 		/* find or create the parent */
 		parent = find_process_tid(&lttngtop, pid, comm);
 		if (!parent) {
-			parent = add_proc(&lttngtop, pid, comm, timestamp);
-			parent->pid = pid;
+			parent = add_proc(&lttngtop, pid, comm, timestamp, hostname);
+			if (parent)
+				parent->pid = pid;
 		}
 
 		/* attach the parent to the current process */
@@ -297,6 +548,7 @@ enum bt_cb_ret fix_process_table(struct bt_ctf_event *call_data,
 
 	update_perf_counter(child, call_data);
 
+end:
 	return BT_CB_OK;
 
 error:
@@ -306,7 +558,11 @@ error:
 void init_lttngtop()
 {
 	copies = g_ptr_array_new();
-	lttngtop.perf_list = g_hash_table_new(g_str_hash, g_str_equal);
+	global_perf_liszt = g_hash_table_new(g_str_hash, g_str_equal);
+	global_filter_list = g_hash_table_new(g_str_hash, g_str_equal);
+	global_host_list = g_hash_table_new(g_str_hash, g_str_equal);
+	tid_filter_list = g_hash_table_new(g_str_hash,
+			g_str_equal);
 
 	sem_init(&goodtodisplay, 0, 0);
 	sem_init(&goodtoupdate, 0, 1);
@@ -315,15 +571,108 @@ void init_lttngtop()
 	sem_init(&pause_sem, 0, 1);
 	sem_init(&end_trace_sem, 0, 0);
 
+	reset_global_counters();
+	lttngtop.nbproc = 0;
+	lttngtop.nbthreads = 0;
+	lttngtop.nbfiles = 0;
+
+	lttngtop.process_hash_table = g_hash_table_new(g_direct_hash,
+			g_direct_equal);
 	lttngtop.process_table = g_ptr_array_new();
 	lttngtop.files_table = g_ptr_array_new();
 	lttngtop.cpu_table = g_ptr_array_new();
+
+	toggle_filter = -1;
 }
 
 void usage(FILE *fp)
 {
 	fprintf(fp, "LTTngTop %s\n\n", VERSION);
-	fprintf(fp, "Usage : lttngtop /path/to/trace\n");
+	fprintf(fp, "Usage : lttngtop [OPTIONS] TRACE\n");
+	fprintf(fp, "  TRACE                    Path to the trace to analyse (-r for network live tracing, nothing for mmap live streaming)\n");
+	fprintf(fp, "  -h, --help               This help message\n");
+	fprintf(fp, "  -t, --textdump           Display live events in text-only\n");
+	fprintf(fp, "  -p, --pid                Comma-separated list of PIDs to display\n");
+	fprintf(fp, "  -f, --child              Follow threads associated with selected PIDs\n");
+	fprintf(fp, "  -n, --hostname           Comma-separated list of hostnames to display (require hostname context in trace)\n");
+	fprintf(fp, "  -k, --kprobes            Comma-separated list of kprobes to insert (same format as lttng enable-event)\n");
+	fprintf(fp, "  -r, --relay-hostname     Network live streaming : hostname of the lttng-relayd (default port)\n");
+	fprintf(fp, "  -b, --begin              Network live streaming : read the trace for the beginning of the recording\n");
+}
+
+/*
+ * Parse probe options.
+ * Shamelessly stolen from lttng-tools :
+ * src/bin/lttng/commands/enable_events.c
+ */
+static struct kprobes *parse_probe_opts(char *opt)
+{
+	char s_hex[19];
+	char name[LTTNG_SYMBOL_NAME_LEN];
+	struct kprobes *kprobe;
+	int ret;
+
+	/*
+	kprobe->probe_addr = 0;
+	kprobe->probe_offset = 0;
+	asprintf(&kprobe->probe_name, "probe_sys_open");
+	asprintf(&kprobe->symbol_name, "sys_open");
+	*/
+
+	if (opt == NULL) {
+		kprobe = NULL;
+		goto end;
+	}
+
+	kprobe = g_new0(struct kprobes, 1);
+
+	/* Check for symbol+offset */
+	ret = sscanf(opt, "%[^'+']+%s", name, s_hex);
+	if (ret == 2) {
+		ret = asprintf(&kprobe->probe_name, "probe_%s", name);
+		ret = asprintf(&kprobe->symbol_name, "%s", name);
+
+		if (strlen(s_hex) == 0) {
+			fprintf(stderr, "Invalid probe offset %s", s_hex);
+			ret = -1;
+			goto end;
+		}
+		kprobe->probe_offset = strtoul(s_hex, NULL, 0);
+		kprobe->probe_addr = 0;
+		goto end;
+	}
+
+	/* Check for symbol */
+	if (isalpha(name[0])) {
+		ret = sscanf(opt, "%s", name);
+		if (ret == 1) {
+			ret = asprintf(&kprobe->probe_name, "probe_%s", name);
+			ret = asprintf(&kprobe->symbol_name, "%s", name);
+			kprobe->probe_offset = 0;
+			kprobe->probe_addr = 0;
+			goto end;
+		}
+	}
+
+	/* Check for address */
+	ret = sscanf(opt, "%s", s_hex);
+	if (ret > 0) {
+		if (strlen(s_hex) == 0) {
+			fprintf(stderr, "Invalid probe address %s", s_hex);
+			ret = -1;
+			goto end;
+		}
+		ret = asprintf(&kprobe->probe_name, "probe_%s", s_hex);
+		kprobe->probe_offset = 0;
+		kprobe->probe_addr = strtoul(s_hex, NULL, 0);
+		goto end;
+	}
+
+	/* No match */
+	kprobe = NULL;
+
+end:
+	return kprobe;
 }
 
 /*
@@ -334,11 +683,11 @@ static int parse_options(int argc, char **argv)
 {
 	poptContext pc;
 	int opt, ret = 0;
+	char *tmp_str;
+	int *tid;
+	int i;
 
-	if (argc == 1) {
-		usage(stdout);
-		return 1;   /* exit cleanly */
-	}
+	remote_live = 0;
 
 	pc = poptGetContext(NULL, argc, (const char **) argv, long_options, 0);
 	poptReadDefaultConfig(pc, 0);
@@ -349,18 +698,55 @@ static int parse_options(int argc, char **argv)
 				usage(stdout);
 				ret = 1;    /* exit cleanly */
 				goto end;
-			case OPT_LIST:
-			//	list_formats(stdout);
-				ret = 1;
-				goto end;
-			case OPT_VERBOSE:
-//				babeltrace_verbose = 1;
+			case OPT_TEXTDUMP:
+				opt_textdump = 1;
 				break;
-			case OPT_DEBUG:
-//				babeltrace_debug = 1;
+			case OPT_CHILD:
+				opt_child = 1;
 				break;
-			case OPT_NAMES:
-//				opt_field_names = 1;
+			case OPT_PID:
+				toggle_filter = 1;
+				tmp_str = strtok(opt_tid, ",");
+				while (tmp_str) {
+					tid = malloc(sizeof(int));
+					*tid = atoi(tmp_str);
+					g_hash_table_insert(tid_filter_list,
+							(gpointer) tid, tid);
+					tmp_str = strtok(NULL, ",");
+				}
+				break;
+			case OPT_BEGIN:
+				/* start reading the live trace from the beginning */
+				opt_begin = 1;
+				break;
+			case OPT_HOSTNAME:
+				toggle_filter = 1;
+				tmp_str = strtok(opt_hostname, ",");
+				while (tmp_str) {
+					add_hostname_list(tmp_str, 1);
+					tmp_str = strtok(NULL, ",");
+				}
+				break;
+			case OPT_RELAY_HOSTNAME:
+				remote_live = 1;
+				break;
+			case OPT_KPROBES:
+				lttngtop.kprobes_table = g_ptr_array_new();
+				tmp_str = strtok(opt_kprobes, ",");
+				while (tmp_str) {
+					struct kprobes *kprobe;
+
+					kprobe = parse_probe_opts(tmp_str);
+					if (kprobe) {
+						g_ptr_array_add(
+							lttngtop.kprobes_table,
+							kprobe);
+					} else {
+						ret = -EINVAL;
+						goto end;
+					}
+					tmp_str = strtok(NULL, ",");
+				}
 				break;
 			default:
 				ret = -EINVAL;
@@ -368,11 +754,19 @@ static int parse_options(int argc, char **argv)
 		}
 	}
 
-	opt_input_path = poptGetArg(pc);
-	if (!opt_input_path) {
-		ret = -EINVAL;
-		goto end;
+	opt_exec_name = NULL;
+	opt_exec_argv = NULL;
+	for (i = 0; i < argc; i++) {
+		if (argv[i][0] == '-' && argv[i][1] == '-') {
+			opt_exec_name = argv[i + 1];
+			opt_exec_argv = &argv[i + 1];
+			break;
+		}
+	}
+	if (!opt_exec_name) {
+		opt_input_path = poptGetArg(pc);
 	}
+
 end:
 	if (pc) {
 		poptFreeContext(pc);
@@ -384,47 +778,102 @@ void iter_trace(struct bt_context *bt_ctx)
 {
 	struct bt_ctf_iter *iter;
 	struct bt_iter_pos begin_pos;
-	struct bt_ctf_event *event;
+	struct kprobes *kprobe;
+	const struct bt_ctf_event *event;
+	int i;
 	int ret = 0;
 
 	begin_pos.type = BT_SEEK_BEGIN;
 	iter = bt_ctf_iter_create(bt_ctx, &begin_pos, NULL);
 
-	/* at each event check if we need to refresh */
-	bt_ctf_iter_add_callback(iter, 0, NULL, 0,
-			check_timestamp,
-			NULL, NULL, NULL);
 	/* at each event, verify the status of the process table */
 	bt_ctf_iter_add_callback(iter, 0, NULL, 0,
 			fix_process_table,
 			NULL, NULL, NULL);
-	/* to handle the scheduling events */
+	/* to handle the follow child option */
 	bt_ctf_iter_add_callback(iter,
-			g_quark_from_static_string("sched_switch"),
-			NULL, 0, handle_sched_switch, NULL, NULL, NULL);
+			g_quark_from_static_string("sched_process_fork"),
+			NULL, 0, handle_sched_process_fork, NULL, NULL, NULL);
 	/* to clean up the process table */
 	bt_ctf_iter_add_callback(iter,
 			g_quark_from_static_string("sched_process_free"),
 			NULL, 0, handle_sched_process_free, NULL, NULL, NULL);
+	if (opt_textdump) {
+		bt_ctf_iter_add_callback(iter, 0, NULL, 0,
+				print_timestamp,
+				NULL, NULL, NULL);
+	} else {
+		/* at each event check if we need to refresh */
+		bt_ctf_iter_add_callback(iter, 0, NULL, 0,
+				check_timestamp,
+				NULL, NULL, NULL);
+		/* to handle the scheduling events */
+		bt_ctf_iter_add_callback(iter,
+				g_quark_from_static_string("sched_switch"),
+				NULL, 0, handle_sched_switch, NULL, NULL, NULL);
+		/* to get all the process from the statedumps */
+		bt_ctf_iter_add_callback(iter,
+				g_quark_from_static_string(
+					"lttng_statedump_process_state"),
+				NULL, 0, handle_statedump_process_state,
+				NULL, NULL, NULL);
+
+		/* for IO top */
+		bt_ctf_iter_add_callback(iter,
+				g_quark_from_static_string("exit_syscall"),
+				NULL, 0, handle_exit_syscall, NULL, NULL, NULL);
+		bt_ctf_iter_add_callback(iter,
+				g_quark_from_static_string("sys_write"),
+				NULL, 0, handle_sys_write, NULL, NULL, NULL);
+		bt_ctf_iter_add_callback(iter,
+				g_quark_from_static_string("sys_read"),
+				NULL, 0, handle_sys_read, NULL, NULL, NULL);
+		bt_ctf_iter_add_callback(iter,
+				g_quark_from_static_string("sys_open"),
+				NULL, 0, handle_sys_open, NULL, NULL, NULL);
+		bt_ctf_iter_add_callback(iter,
+				g_quark_from_static_string("sys_close"),
+				NULL, 0, handle_sys_close, NULL, NULL, NULL);
+		bt_ctf_iter_add_callback(iter,
+				g_quark_from_static_string(
+					"lttng_statedump_file_descriptor"),
+				NULL, 0, handle_statedump_file_descriptor,
+				NULL, NULL, NULL);
+
+		/* for kprobes */
+		if (lttngtop.kprobes_table) {
+			for (i = 0; i < lttngtop.kprobes_table->len; i++) {
+				kprobe = g_ptr_array_index(lttngtop.kprobes_table, i);
+				bt_ctf_iter_add_callback(iter,
+						g_quark_from_static_string(
+							kprobe->probe_name),
+						NULL, 0, handle_kprobes,
+						NULL, NULL, NULL);
+			}
+		}
+	}
 
-	/* for IO top */
-	bt_ctf_iter_add_callback(iter,
-			g_quark_from_static_string("exit_syscall"),
-			NULL, 0, handle_exit_syscall, NULL, NULL, NULL);
-	bt_ctf_iter_add_callback(iter,
-			g_quark_from_static_string("sys_write"),
-			NULL, 0, handle_sys_write, NULL, NULL, NULL);
-	bt_ctf_iter_add_callback(iter,
-			g_quark_from_static_string("sys_read"),
-			NULL, 0, handle_sys_read, NULL, NULL, NULL);
-	bt_ctf_iter_add_callback(iter,
-			g_quark_from_static_string("sys_open"),
-			NULL, 0, handle_sys_open, NULL, NULL, NULL);
+	if (opt_exec_name) {
+		pid_t pid;
+
+		pid = fork();
+		if (pid == 0) {
+			execvpe(opt_exec_name, opt_exec_argv, opt_exec_env);
+			exit(EXIT_SUCCESS);
+		} else if (pid > 0) {
+			opt_exec_pid = pid;
+			g_hash_table_insert(tid_filter_list,
+					(gpointer) &pid,
+					&pid);
+		} else {
+			perror("fork");
+			exit(EXIT_FAILURE);
+		}
+	}
 
-	bt_ctf_iter_add_callback(iter,
-			g_quark_from_static_string("sys_close"),
-			NULL, 0, handle_sys_close, NULL, NULL, NULL);
 	while ((event = bt_ctf_iter_read_event(iter)) != NULL) {
+		if (quit || reload_trace)
+			goto end_iter;
 		ret = bt_iter_next(bt_ctf_get_iter(iter));
 		if (ret < 0)
 			goto end_iter;
@@ -451,7 +900,7 @@ end_iter:
  */
 int bt_context_add_traces_recursive(struct bt_context *ctx, const char *path,
 		const char *format_str,
-		void (*packet_seek)(struct stream_pos *pos,
+		void (*packet_seek)(struct bt_stream_pos *pos,
 			size_t offset, int whence))
 {
 	FTS *tree;
@@ -459,8 +908,21 @@ int bt_context_add_traces_recursive(struct bt_context *ctx, const char *path,
 	GArray *trace_ids;
 	char lpath[PATH_MAX];
 	char * const paths[2] = { lpath, NULL };
-	int ret;
-
+	int ret = -1;
+
+	if ((strncmp(path, NET4_URL_PREFIX, sizeof(NET4_URL_PREFIX) - 1)) == 0 ||
+			(strncmp(path, NET6_URL_PREFIX, sizeof(NET6_URL_PREFIX) - 1)) == 0 ||
+			(strncmp(path, NET_URL_PREFIX, sizeof(NET_URL_PREFIX) - 1)) == 0) {
+		ret = bt_context_add_trace(ctx,
+				path, format_str, packet_seek, NULL, NULL);
+		if (ret < 0) {
+			fprintf(stderr, "[warning] [Context] cannot open trace \"%s\" "
+					"for reading.\n", path);
+			/* Allow to skip erroneous traces. */
+			ret = 1;	/* partial error */
+		}
+		return ret;
+	}
 	/*
 	 * Need to copy path, because fts_open can change it.
 	 * It is the pointer array, not the strings, that are constant.
@@ -492,11 +954,8 @@ int bt_context_add_traces_recursive(struct bt_context *ctx, const char *path,
 		}
 		metafd = openat(dirfd, "metadata", O_RDONLY);
 		if (metafd < 0) {
-			ret = close(dirfd);
-			if (ret < 0) {
-				perror("close");
-				goto error;
-			}
+			close(dirfd);
+			continue;
 		} else {
 			int trace_id;
 
@@ -515,27 +974,145 @@ int bt_context_add_traces_recursive(struct bt_context *ctx, const char *path,
 				node->fts_accpath, format_str,
 				packet_seek, NULL, NULL);
 			if (trace_id < 0) {
-				fprintf(stderr, "[error] [Context] opening trace \"%s\" from %s "
+				fprintf(stderr, "[warning] [Context] opening trace \"%s\" from %s "
 					"for reading.\n", node->fts_accpath, path);
-				ret = trace_id;
-				goto error;
+				/* Allow to skip erroneous traces. */
+				continue;
 			}
 			g_array_append_val(trace_ids, trace_id);
 		}
 	}
 
 	g_array_free(trace_ids, TRUE);
-	return 0;
+	return ret;
 
 error:
 	return ret;
 }
 
-int main(int argc, char **argv)
+static int check_field_requirements(const struct bt_ctf_field_decl *const * field_list,
+		int field_cnt, int *tid_check, int *pid_check,
+		int *procname_check, int *ppid_check)
+{
+	int j;
+	struct perfcounter *global;
+	const char *name;
+
+	for (j = 0; j < field_cnt; j++) {
+		name = bt_ctf_get_decl_field_name(field_list[j]);
+		if (*tid_check == 0) {
+			if (strncmp(name, "tid", 3) == 0)
+				(*tid_check)++;
+		}
+		if (*pid_check == 0) {
+			if (strncmp(name, "pid", 3) == 0)
+				(*pid_check)++;
+		}
+		if (*ppid_check == 0) {
+			if (strncmp(name, "ppid", 4) == 0)
+				(*ppid_check)++;
+		}
+		if (*procname_check == 0) {
+			if (strncmp(name, "procname", 8) == 0)
+				(*procname_check)++;
+		}
+		if (strncmp(name, "perf_", 5) == 0) {
+			global = g_hash_table_lookup(global_perf_liszt, (gpointer) name);
+			if (!global) {
+				global = g_new0(struct perfcounter, 1);
+				/* by default, sort on the first perf context */
+				if (g_hash_table_size(global_perf_liszt) == 0)
+					global->sort = 1;
+				global->visible = 1;
+				g_hash_table_insert(global_perf_liszt, (gpointer) strdup(name), global);
+			}
+		}
+	}
+
+	if (*tid_check == 1 && *pid_check == 1 && *ppid_check == 1 &&
+			*procname_check == 1)
+		return 0;
+
+	return -1;
+}
+
+/*
+ * check_requirements: check if the required context informations are available
+ *
+ * If each mandatory context information is available for at least in one
+ * event, return 0 otherwise return -1.
+ */
+int check_requirements(struct bt_context *ctx)
+{
+	unsigned int i, evt_cnt, field_cnt;
+	struct bt_ctf_event_decl *const * evt_list;
+	const struct bt_ctf_field_decl *const * field_list;
+	int tid_check = 0;
+	int pid_check = 0;
+	int procname_check = 0;
+	int ppid_check = 0;
+	int ret = 0;
+
+	ret = bt_ctf_get_event_decl_list(0, ctx, &evt_list, &evt_cnt);
+	if (ret < 0) {
+		goto end;
+	}
+
+	for (i = 0; i < evt_cnt; i++) {
+		bt_ctf_get_decl_fields(evt_list[i], BT_STREAM_EVENT_CONTEXT,
+				&field_list, &field_cnt);
+		ret = check_field_requirements(field_list, field_cnt,
+				&tid_check, &pid_check, &procname_check,
+				&ppid_check);
+
+		bt_ctf_get_decl_fields(evt_list[i], BT_EVENT_CONTEXT,
+				&field_list, &field_cnt);
+		ret = check_field_requirements(field_list, field_cnt,
+				&tid_check, &pid_check, &procname_check,
+				&ppid_check);
+
+		bt_ctf_get_decl_fields(evt_list[i], BT_STREAM_PACKET_CONTEXT,
+				&field_list, &field_cnt);
+		ret = check_field_requirements(field_list, field_cnt,
+				&tid_check, &pid_check, &procname_check,
+				&ppid_check);
+	}
+
+	if (tid_check == 0) {
+		ret = -1;
+		fprintf(stderr, "[error] missing tid context information\n");
+	}
+	if (pid_check == 0) {
+		ret = -1;
+		fprintf(stderr, "[error] missing pid context information\n");
+	}
+	if (ppid_check == 0) {
+		ret = -1;
+		fprintf(stderr, "[error] missing ppid context information\n");
+	}
+	if (procname_check == 0) {
+		ret = -1;
+		fprintf(stderr, "[error] missing procname context information\n");
+	}
+
+end:
+	return ret;
+}
+
+static void handle_sigchild(int signal)
+{
+	int status;
+
+	waitpid(opt_exec_pid, &status, 0);
+}
+
+int main(int argc, char **argv, char **envp)
 {
 	int ret;
 	struct bt_context *bt_ctx = NULL;
 
+	//babeltrace_verbose = 1;
+	init_lttngtop();
 	ret = parse_options(argc, argv);
 	if (ret < 0) {
 		fprintf(stdout, "Error parsing options.\n\n");
@@ -545,25 +1122,80 @@ int main(int argc, char **argv)
 		exit(EXIT_SUCCESS);
 	}
 
-	init_lttngtop();
+	if (opt_exec_name) {
+		opt_exec_env = envp;
+		signal(SIGCHLD, handle_sigchild);
+	}
+
+	if (!opt_input_path && !remote_live && !opt_exec_name) {
+		/* mmap live */
+#ifdef LTTNGTOP_MMAP_LIVE
+		if (opt_textdump) {
+			signal(SIGTERM, handle_textdump_sigterm);
+			signal(SIGINT, handle_textdump_sigterm);
+		}
+		mmap_live_loop(bt_ctx);
+		pthread_join(timer_thread, NULL);
+		quit = 1;
+		pthread_join(display_thread, NULL);
+
+		lttng_stop_tracing("test");
+		lttng_destroy_session("test");
 
-	bt_ctx = bt_context_create();
-	ret = bt_context_add_traces_recursive(bt_ctx, opt_input_path, "ctf", NULL);
-	if (ret < 0) {
-		printf("[error] Opening the trace\n");
 		goto end;
-	}
+#else
+		fprintf(stderr, "[ERROR] Mmap live support not compiled, specify a "
+				"trace directory or -r <relayd hostname/IP>\n");
+		usage(stdout);
+		ret = -1;
+		goto end;
+#endif /* LTTNGTOP_MMAP_LIVE */
+	} else if (!opt_input_path && remote_live) {
+		/* network live */
+		bt_ctx = bt_context_create();
+		ret = bt_context_add_traces_recursive(bt_ctx, opt_relay_hostname,
+				"lttng-live", NULL);
+		if (ret < 0) {
+			fprintf(stderr, "[error] Opening the trace\n");
+			goto end;
+		}
+	} else {
+		//init_lttngtop();
+
+		bt_ctx = bt_context_create();
+		ret = bt_context_add_traces_recursive(bt_ctx, opt_input_path, "ctf", NULL);
+		if (ret < 0) {
+			fprintf(stderr, "[error] Opening the trace\n");
+			goto end;
+		}
 
-	pthread_create(&display_thread, NULL, ncurses_display, (void *) NULL);
-	pthread_create(&timer_thread, NULL, refresh_thread, (void *) NULL);
+		ret = check_requirements(bt_ctx);
+		if (ret < 0) {
+			fprintf(stderr, "[error] some mandatory contexts "
+					"were missing, exiting.\n");
+			goto end;
+		}
+
+		if (!opt_textdump) {
+			pthread_create(&display_thread, NULL, ncurses_display,
+					(void *) NULL);
+			pthread_create(&timer_thread, NULL, refresh_thread,
+					(void *) NULL);
+		}
+
+		iter_trace(bt_ctx);
+	}
 
-	iter_trace(bt_ctx);
 
-	quit = 1;
 	pthread_join(display_thread, NULL);
+	quit = 1;
 	pthread_join(timer_thread, NULL);
 
+	ret = 0;
+
 end:
-	bt_context_put(bt_ctx);
-	return 0;
+	if (bt_ctx)
+		bt_context_put(bt_ctx);
+
+	return ret;
 }