[lttngtop.git] / src / lttngtop.c

/*
 * Copyright (C) 2011-2012 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
 * published by the Free Software Foundation;
 *
 * 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.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#define _GNU_SOURCE
#include <config.h>
#include <stdio.h>
#include <stdint.h>
#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>
#include <stdlib.h>
#include <ftw.h>
#include <dirent.h>
#include <ctype.h>
#include <sys/stat.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#include <fts.h>
#include <assert.h>

#include "lttngtoptypes.h"
#include "cputop.h"
#include "iostreamtop.h"
#include "cursesdisplay.h"
#include "common.h"

#define DEFAULT_FILE_ARRAY_SIZE 1

const char *opt_input_path;

struct lttngtop *copy;
pthread_t display_thread;
pthread_t timer_thread;

unsigned long refresh_display = 1 * NSEC_PER_SEC;
unsigned long last_display_update = 0;
int quit = 0;

enum {
	OPT_NONE = 0,
	OPT_HELP,
	OPT_LIST,
	OPT_VERBOSE,
	OPT_DEBUG,
	OPT_NAMES,
};

static struct poptOption long_options[] = {
	/* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
	{ "help", 'h', POPT_ARG_NONE, NULL, OPT_HELP, NULL, NULL },
	{ NULL, 0, 0, NULL, 0, NULL, NULL },
};

void *refresh_thread(void *p)
{
	while (1) {
		if (quit)
			return NULL;
		sem_wait(&pause_sem);
		sem_post(&pause_sem);
		sem_post(&timer);
		sleep(refresh_display/NSEC_PER_SEC);
	}
}

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) {
		sem_wait(&timer);
		sem_wait(&goodtodisplay);
		sem_wait(&pause_sem);

		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);
		}
	}
}

/*
 * hook on each event to check the timestamp and refresh the display if
 * necessary
 */
enum bt_cb_ret check_timestamp(struct bt_ctf_event *call_data, void *private_data)
{
	unsigned long timestamp;

	timestamp = bt_ctf_get_timestamp(call_data);
	if (timestamp == -1ULL)
		goto error;

	if (last_display_update == 0)
		last_display_update = timestamp;

	if (timestamp - last_display_update >= refresh_display) {
		sem_wait(&goodtoupdate);
		g_ptr_array_add(copies, get_copy_lttngtop(last_display_update,
					timestamp));
		sem_post(&goodtodisplay);
		sem_post(&bootstrap);
		last_display_update = timestamp;
	}
	return BT_CB_OK;

error:
	fprintf(stderr, "check_timestamp callback error\n");
	return BT_CB_ERROR_STOP;
}

/*
 * get_perf_counter : get or create and return a perf_counter struct for
 * either a process or a cpu (only one of the 2 parameters mandatory)
 */
struct perfcounter *get_perf_counter(const char *name, struct processtop *proc,
		struct cputime *cpu)
{
	struct perfcounter *ret, *global;
	GHashTable *table;

	if (proc)
		table = proc->perf;
	else if (cpu)
		table = cpu->perf;
	else
		goto error;

	ret = g_hash_table_lookup(table, (gpointer) name);
	if (ret)
		goto end;

	ret = g_new0(struct perfcounter, 1);
	/* by default, make it visible in the UI */
	ret->visible = 1;
	g_hash_table_insert(table, (gpointer) strdup(name), ret);

	global = g_hash_table_lookup(global_perf_liszt, (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(global_perf_liszt) == 0)
			global->sort = 1;
		g_hash_table_insert(global_perf_liszt, (gpointer) strdup(name), global);
	}

end:
	return ret;

error:
	return NULL;
}

void update_perf_value(struct processtop *proc, struct cputime *cpu,
		const char *name, int value)
{
	struct perfcounter *cpu_perf, *process_perf;

	cpu_perf = get_perf_counter(name, NULL, cpu);
	if (cpu_perf->count < value) {
		process_perf = get_perf_counter(name, proc, NULL);
		process_perf->count += value - cpu_perf->count;
		cpu_perf->count = value;
	}
}

void extract_perf_counter_scope(const struct bt_ctf_event *event,
		const struct definition *scope,
		struct processtop *proc,
		struct cputime *cpu)
{
	struct definition const * const *list = NULL;
	unsigned int count;
	int i, ret;

	if (!scope)
		goto end;

	ret = bt_ctf_get_field_list(event, scope, &list, &count);
	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 (bt_ctf_field_get_error())
				continue;
			update_perf_value(proc, cpu, name, value);
		}
	}

end:
	return;
}

void update_perf_counter(struct processtop *proc, const struct bt_ctf_event *event)
{
	struct cputime *cpu;
	const struct definition *scope;

	cpu = get_cpu(get_cpu_id(event));

	scope = bt_ctf_get_top_level_scope(event, BT_STREAM_EVENT_CONTEXT);
	extract_perf_counter_scope(event, scope, proc, cpu);

	scope = bt_ctf_get_top_level_scope(event, BT_STREAM_PACKET_CONTEXT);
	extract_perf_counter_scope(event, scope, proc, cpu);

	scope = bt_ctf_get_top_level_scope(event, BT_EVENT_CONTEXT);
	extract_perf_counter_scope(event, scope, proc, cpu);
}

enum bt_cb_ret fix_process_table(struct bt_ctf_event *call_data,
		void *private_data)
{
	int pid, tid, ppid;
	char *comm;
	struct processtop *parent, *child;
	unsigned long timestamp;

	timestamp = bt_ctf_get_timestamp(call_data);
	if (timestamp == -1ULL)
		goto error;

	pid = get_context_pid(call_data);
	if (pid == -1ULL) {
		goto error;
	}
	tid = get_context_tid(call_data);
	if (tid == -1ULL) {
		goto error;
	}
	ppid = get_context_ppid(call_data);
	if (ppid == -1ULL) {
		goto error;
	}
	comm = get_context_comm(call_data);
	if (!comm) {
		goto error;
	}

	/* 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);

	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;
		}

		/* attach the parent to the current process */
		child->threadparent = parent;
		add_thread(parent, child);
	}

	update_perf_counter(child, call_data);

	return BT_CB_OK;

error:
	return BT_CB_ERROR_STOP;
}

void init_lttngtop()
{
	copies = g_ptr_array_new();
	global_perf_liszt = g_hash_table_new(g_str_hash, g_str_equal);

	sem_init(&goodtodisplay, 0, 0);
	sem_init(&goodtoupdate, 0, 1);
	sem_init(&timer, 0, 1);
	sem_init(&bootstrap, 0, 0);
	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_table = g_ptr_array_new();
	lttngtop.files_table = g_ptr_array_new();
	lttngtop.cpu_table = g_ptr_array_new();
}

void usage(FILE *fp)
{
	fprintf(fp, "LTTngTop %s\n\n", VERSION);
	fprintf(fp, "Usage : lttngtop /path/to/trace\n");
}

/*
 * Return 0 if caller should continue, < 0 if caller should return
 * error, > 0 if caller should exit without reporting error.
 */
static int parse_options(int argc, char **argv)
{
	poptContext pc;
	int opt, ret = 0;

	if (argc == 1) {
		usage(stdout);
		return 1;   /* exit cleanly */
	}

	pc = poptGetContext(NULL, argc, (const char **) argv, long_options, 0);
	poptReadDefaultConfig(pc, 0);

	while ((opt = poptGetNextOpt(pc)) != -1) {
		switch (opt) {
			case OPT_HELP:
				usage(stdout);
				ret = 1;    /* exit cleanly */
				goto end;
			default:
				ret = -EINVAL;
				goto end;
		}
	}

	opt_input_path = poptGetArg(pc);
	if (!opt_input_path) {
		ret = -EINVAL;
		goto end;
	}
end:
	if (pc) {
		poptFreeContext(pc);
	}
	return ret;
}

void iter_trace(struct bt_context *bt_ctx)
{
	struct bt_ctf_iter *iter;
	struct bt_iter_pos begin_pos;
	const struct bt_ctf_event *event;
	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 */
	bt_ctf_iter_add_callback(iter,
			g_quark_from_static_string("sched_switch"),
			NULL, 0, handle_sched_switch, 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);
	/* 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);

	while ((event = bt_ctf_iter_read_event(iter)) != NULL) {
		ret = bt_iter_next(bt_ctf_get_iter(iter));
		if (ret < 0)
			goto end_iter;
	}

	/* block until quit, we reached the end of the trace */
	sem_wait(&end_trace_sem);

end_iter:
	bt_ctf_iter_destroy(iter);
}

/*
 * bt_context_add_traces_recursive: Open a trace recursively
 * (copied from BSD code in converter/babeltrace.c)
 *
 * Find each trace present in the subdirectory starting from the given
 * path, and add them to the context. The packet_seek parameter can be
 * NULL: this specify to use the default format packet_seek.
 *
 * Return: 0 on success, nonzero on failure.
 * Unable to open toplevel: failure.
 * Unable to open some subdirectory or file: warn and continue;
 */
int bt_context_add_traces_recursive(struct bt_context *ctx, const char *path,
		const char *format_str,
		void (*packet_seek)(struct stream_pos *pos,
			size_t offset, int whence))
{
	FTS *tree;
	FTSENT *node;
	GArray *trace_ids;
	char lpath[PATH_MAX];
	char * const paths[2] = { lpath, NULL };
	int ret = -1;

	/*
	 * Need to copy path, because fts_open can change it.
	 * It is the pointer array, not the strings, that are constant.
	 */
	strncpy(lpath, path, PATH_MAX);
	lpath[PATH_MAX - 1] = '\0';

	tree = fts_open(paths, FTS_NOCHDIR | FTS_LOGICAL, 0);
	if (tree == NULL) {
		fprintf(stderr, "[error] [Context] Cannot traverse \"%s\" for reading.\n",
				path);
		return -EINVAL;
	}

	trace_ids = g_array_new(FALSE, TRUE, sizeof(int));

	while ((node = fts_read(tree))) {
		int dirfd, metafd;

		if (!(node->fts_info & FTS_D))
			continue;

		dirfd = open(node->fts_accpath, 0);
		if (dirfd < 0) {
			fprintf(stderr, "[error] [Context] Unable to open trace "
				"directory file descriptor.\n");
			ret = dirfd;
			goto error;
		}
		metafd = openat(dirfd, "metadata", O_RDONLY);
		if (metafd < 0) {
			close(dirfd);
			ret = -1;
			continue;
		} else {
			int trace_id;

			ret = close(metafd);
			if (ret < 0) {
				perror("close");
				goto error;
			}
			ret = close(dirfd);
			if (ret < 0) {
				perror("close");
				goto error;
			}

			trace_id = bt_context_add_trace(ctx,
				node->fts_accpath, format_str,
				packet_seek, NULL, NULL);
			if (trace_id < 0) {
				fprintf(stderr, "[warning] [Context] opening trace \"%s\" from %s "
					"for reading.\n", node->fts_accpath, path);
				/* Allow to skip erroneous traces. */
				continue;
			}
			g_array_append_val(trace_ids, trace_id);
		}
	}

	g_array_free(trace_ids, TRUE);
	return ret;

error:
	return ret;
}

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;

	for (j = 0; j < field_cnt; j++) {
		if (*tid_check == 0) {
			if (strncmp(bt_ctf_get_decl_field_name(field_list[j]), "tid", 3) == 0) {
				(*tid_check)++;
			}
		}
		if (*pid_check == 0) {
			if (strncmp(bt_ctf_get_decl_field_name(field_list[j]), "pid", 3) == 0)
				(*pid_check)++;
		}
		if (*ppid_check == 0) {
			if (strncmp(bt_ctf_get_decl_field_name(field_list[j]), "ppid", 4) == 0)
				(*ppid_check)++;
		}
		if (*procname_check == 0) {
			if (strncmp(bt_ctf_get_decl_field_name(field_list[j]), "procname", 8) == 0)
				(*procname_check)++;
		}
	}
	/* if all checks are OK, no need to continue the checks */
	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;

	bt_ctf_get_event_decl_list(0, ctx, &evt_list, &evt_cnt);
	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);
		if (ret == 0)
			goto end;

		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);
		if (ret == 0)
			goto end;

		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 (ret == 0)
			goto end;
	}

	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;
}

int main(int argc, char **argv)
{
	int ret;
	struct bt_context *bt_ctx = NULL;

	ret = parse_options(argc, argv);
	if (ret < 0) {
		fprintf(stdout, "Error parsing options.\n\n");
		usage(stdout);
		exit(EXIT_FAILURE);
	} else if (ret > 0) {
		exit(EXIT_SUCCESS);
	}

	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;
	}

	ret = check_requirements(bt_ctx);
	if (ret < 0) {
		fprintf(stderr, "[error] some mandatory contexts were missing, exiting.\n");
		goto end;
	}

	pthread_create(&display_thread, NULL, ncurses_display, (void *) NULL);
	pthread_create(&timer_thread, NULL, refresh_thread, (void *) NULL);

	iter_trace(bt_ctx);

	quit = 1;
	pthread_join(display_thread, NULL);
	pthread_join(timer_thread, NULL);

end:
	bt_context_put(bt_ctx);
	return 0;
}
Commit	Line	Data
1fc22eb4	1	/*
aa15ac1c	2	* Copyright (C) 2011-2012 Julien Desfossez
1fc22eb4 JD	3	*
	4	* This program is free software; you can redistribute it and/or modify
	5	* it under the terms of the GNU General Public License Version 2 as
	6	* published by the Free Software Foundation;
	7	*
	8	* This program is distributed in the hope that it will be useful,
	9	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	10	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	11	* GNU General Public License for more details.
	12	*
71bd7ce1 AM	13	* You should have received a copy of the GNU General Public License along
	14	* with this program; if not, write to the Free Software Foundation, Inc.,
	15	* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
1fc22eb4 JD	16	*/
	17
	18	#define _GNU_SOURCE
	19	#include <config.h>
	20	#include <stdio.h>
	21	#include <stdint.h>
	22	#include <babeltrace/babeltrace.h>
	23	#include <babeltrace/ctf/events.h>
	24	#include <babeltrace/ctf/callbacks.h>
3ba84bed	25	#include <babeltrace/ctf/iterator.h>
1fc22eb4 JD	26	#include <fcntl.h>
	27	#include <pthread.h>
	28	#include <popt.h>
	29	#include <stdlib.h>
	30	#include <ftw.h>
	31	#include <dirent.h>
	32	#include <ctype.h>
	33	#include <sys/stat.h>
	34	#include <unistd.h>
	35	#include <string.h>
	36	#include <errno.h>
	37	#include <sys/types.h>
	38	#include <fts.h>
85db4618	39	#include <assert.h>
1fc22eb4 JD	40
	41	#include "lttngtoptypes.h"
	42	#include "cputop.h"
	43	#include "iostreamtop.h"
	44	#include "cursesdisplay.h"
	45	#include "common.h"
	46
	47	#define DEFAULT_FILE_ARRAY_SIZE 1
	48
	49	const char *opt_input_path;
	50
	51	struct lttngtop *copy;
	52	pthread_t display_thread;
	53	pthread_t timer_thread;
	54
	55	unsigned long refresh_display = 1 * NSEC_PER_SEC;
	56	unsigned long last_display_update = 0;
	57	int quit = 0;
	58
	59	enum {
	60	OPT_NONE = 0,
	61	OPT_HELP,
	62	OPT_LIST,
	63	OPT_VERBOSE,
	64	OPT_DEBUG,
	65	OPT_NAMES,
	66	};
	67
	68	static struct poptOption long_options[] = {
	69	/* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
	70	{ "help", 'h', POPT_ARG_NONE, NULL, OPT_HELP, NULL, NULL },
	71	{ NULL, 0, 0, NULL, 0, NULL, NULL },
	72	};
	73
	74	void refresh_thread(void p)
	75	{
	76	while (1) {
85db4618 JD	77	if (quit)
85db4618 JD	78	return NULL;
1fc22eb4 JD	79	sem_wait(&pause_sem);
	80	sem_post(&pause_sem);
	81	sem_post(&timer);
	82	sleep(refresh_display/NSEC_PER_SEC);
	83	}
	84	}
	85
	86	void ncurses_display(void p)
	87	{
	88	unsigned int current_display_index = 0;
	89
	90	sem_wait(&bootstrap);
b332d28f JD	91	/*
	92	* Prevent the 1 second delay when we hit ESC
	93	*/
	94	ESCDELAY = 0;
1fc22eb4 JD	95	init_ncurses();
	96
	97	while (1) {
	98	sem_wait(&timer);
	99	sem_wait(&goodtodisplay);
	100	sem_wait(&pause_sem);
	101
	102	copy = g_ptr_array_index(copies, current_display_index);
85db4618 JD	103	assert(copy);
85db4618 JD	104	display(current_display_index++);
1fc22eb4 JD	105
	106	sem_post(&goodtoupdate);
	107	sem_post(&pause_sem);
	108
	109	if (quit) {
	110	reset_ncurses();
	111	pthread_exit(0);
	112	}
	113	}
	114	}
	115
	116	/*
	117	* hook on each event to check the timestamp and refresh the display if
	118	* necessary
	119	*/
4adc8274	120	enum bt_cb_ret check_timestamp(struct bt_ctf_event call_data, void private_data)
1fc22eb4 JD	121	{
	122	unsigned long timestamp;
	123
	124	timestamp = bt_ctf_get_timestamp(call_data);
	125	if (timestamp == -1ULL)
	126	goto error;
	127
	128	if (last_display_update == 0)
	129	last_display_update = timestamp;
	130
	131	if (timestamp - last_display_update >= refresh_display) {
	132	sem_wait(&goodtoupdate);
	133	g_ptr_array_add(copies, get_copy_lttngtop(last_display_update,
	134	timestamp));
	135	sem_post(&goodtodisplay);
	136	sem_post(&bootstrap);
	137	last_display_update = timestamp;
	138	}
	139	return BT_CB_OK;
	140
	141	error:
	142	fprintf(stderr, "check_timestamp callback error\n");
	143	return BT_CB_ERROR_STOP;
	144	}
	145
	146	/*
	147	* get_perf_counter : get or create and return a perf_counter struct for
	148	* either a process or a cpu (only one of the 2 parameters mandatory)
	149	*/
	150	struct perfcounter get_perf_counter(const char name, struct processtop *proc,
	151	struct cputime *cpu)
	152	{
	153	struct perfcounter ret, global;
	154	GHashTable *table;
	155
	156	if (proc)
	157	table = proc->perf;
	158	else if (cpu)
	159	table = cpu->perf;
	160	else
	161	goto error;
	162
	163	ret = g_hash_table_lookup(table, (gpointer) name);
	164	if (ret)
	165	goto end;
	166
559c9f86	167	ret = g_new0(struct perfcounter, 1);
1fc22eb4 JD	168	/* by default, make it visible in the UI */
1fc22eb4 JD	169	ret->visible = 1;
85db4618	170	g_hash_table_insert(table, (gpointer) strdup(name), ret);
1fc22eb4	171
0d91c12a	172	global = g_hash_table_lookup(global_perf_liszt, (gpointer) name);
1fc22eb4	173	if (!global) {
559c9f86	174	global = g_new0(struct perfcounter, 1);
1fc22eb4 JD	175	memcpy(global, ret, sizeof(struct perfcounter));
1fc22eb4 JD	176	/* by default, sort on the first perf context */
0d91c12a	177	if (g_hash_table_size(global_perf_liszt) == 0)
1fc22eb4	178	global->sort = 1;
0d91c12a	179	g_hash_table_insert(global_perf_liszt, (gpointer) strdup(name), global);
1fc22eb4 JD	180	}
	181
	182	end:
	183	return ret;
	184
	185	error:
	186	return NULL;
	187	}
	188
	189	void update_perf_value(struct processtop proc, struct cputime cpu,
	190	const char *name, int value)
	191	{
	192	struct perfcounter cpu_perf, process_perf;
	193
	194	cpu_perf = get_perf_counter(name, NULL, cpu);
	195	if (cpu_perf->count < value) {
	196	process_perf = get_perf_counter(name, proc, NULL);
	197	process_perf->count += value - cpu_perf->count;
	198	cpu_perf->count = value;
	199	}
	200	}
	201
4adc8274	202	void extract_perf_counter_scope(const struct bt_ctf_event *event,
3ba84bed	203	const struct definition *scope,
1fc22eb4 JD	204	struct processtop *proc,
	205	struct cputime *cpu)
	206	{
	207	struct definition const * const *list = NULL;
	208	unsigned int count;
	209	int i, ret;
	210
	211	if (!scope)
	212	goto end;
	213
	214	ret = bt_ctf_get_field_list(event, scope, &list, &count);
	215	if (ret < 0)
	216	goto end;
	217
	218	for (i = 0; i < count; i++) {
	219	const char *name = bt_ctf_field_name(list[i]);
6419078d	220	if (strncmp(name, "perf_", 5) == 0) {
1fc22eb4 JD	221	int value = bt_ctf_get_uint64(list[i]);
	222	if (bt_ctf_field_get_error())
	223	continue;
	224	update_perf_value(proc, cpu, name, value);
	225	}
	226	}
	227
	228	end:
	229	return;
	230	}
	231
4adc8274	232	void update_perf_counter(struct processtop proc, const struct bt_ctf_event event)
1fc22eb4	233	{
1fc22eb4	234	struct cputime *cpu;
3ba84bed	235	const struct definition *scope;
1fc22eb4	236
d67167cd	237	cpu = get_cpu(get_cpu_id(event));
1fc22eb4 JD	238
	239	scope = bt_ctf_get_top_level_scope(event, BT_STREAM_EVENT_CONTEXT);
	240	extract_perf_counter_scope(event, scope, proc, cpu);
	241
	242	scope = bt_ctf_get_top_level_scope(event, BT_STREAM_PACKET_CONTEXT);
	243	extract_perf_counter_scope(event, scope, proc, cpu);
	244
	245	scope = bt_ctf_get_top_level_scope(event, BT_EVENT_CONTEXT);
	246	extract_perf_counter_scope(event, scope, proc, cpu);
1fc22eb4 JD	247	}
1fc22eb4 JD	248
4adc8274	249	enum bt_cb_ret fix_process_table(struct bt_ctf_event *call_data,
1fc22eb4 JD	250	void *private_data)
	251	{
	252	int pid, tid, ppid;
	253	char *comm;
	254	struct processtop parent, child;
1fc22eb4 JD	255	unsigned long timestamp;
1fc22eb4 JD	256
1fc22eb4 JD	257	timestamp = bt_ctf_get_timestamp(call_data);
	258	if (timestamp == -1ULL)
	259	goto error;
	260
1dec520a JD	261	pid = get_context_pid(call_data);
1dec520a JD	262	if (pid == -1ULL) {
1fc22eb4 JD	263	goto error;
1fc22eb4 JD	264	}
1dec520a JD	265	tid = get_context_tid(call_data);
1dec520a JD	266	if (tid == -1ULL) {
1fc22eb4 JD	267	goto error;
1fc22eb4 JD	268	}
1dec520a JD	269	ppid = get_context_ppid(call_data);
1dec520a JD	270	if (ppid == -1ULL) {
1fc22eb4 JD	271	goto error;
1fc22eb4 JD	272	}
1dec520a JD	273	comm = get_context_comm(call_data);
1dec520a JD	274	if (!comm) {
1fc22eb4 JD	275	goto error;
	276	}
	277
	278	/* find or create the current process */
	279	child = find_process_tid(&lttngtop, tid, comm);
	280	if (!child)
	281	child = add_proc(&lttngtop, tid, comm, timestamp);
	282	update_proc(child, pid, tid, ppid, comm);
	283
	284	if (pid != tid) {
	285	/* find or create the parent */
	286	parent = find_process_tid(&lttngtop, pid, comm);
	287	if (!parent) {
	288	parent = add_proc(&lttngtop, pid, comm, timestamp);
	289	parent->pid = pid;
	290	}
	291
	292	/* attach the parent to the current process */
	293	child->threadparent = parent;
	294	add_thread(parent, child);
	295	}
	296
	297	update_perf_counter(child, call_data);
	298
	299	return BT_CB_OK;
	300
	301	error:
	302	return BT_CB_ERROR_STOP;
	303	}
	304
	305	void init_lttngtop()
	306	{
	307	copies = g_ptr_array_new();
0d91c12a	308	global_perf_liszt = g_hash_table_new(g_str_hash, g_str_equal);
1fc22eb4 JD	309
	310	sem_init(&goodtodisplay, 0, 0);
	311	sem_init(&goodtoupdate, 0, 1);
	312	sem_init(&timer, 0, 1);
	313	sem_init(&bootstrap, 0, 0);
	314	sem_init(&pause_sem, 0, 1);
	315	sem_init(&end_trace_sem, 0, 0);
	316
e05a35a6 JD	317	reset_global_counters();
	318	lttngtop.nbproc = 0;
	319	lttngtop.nbthreads = 0;
	320	lttngtop.nbfiles = 0;
	321
1fc22eb4 JD	322	lttngtop.process_table = g_ptr_array_new();
	323	lttngtop.files_table = g_ptr_array_new();
	324	lttngtop.cpu_table = g_ptr_array_new();
	325	}
	326
c263c4eb	327	void usage(FILE *fp)
1fc22eb4	328	{
c263c4eb JD	329	fprintf(fp, "LTTngTop %s\n\n", VERSION);
c263c4eb JD	330	fprintf(fp, "Usage : lttngtop /path/to/trace\n");
1fc22eb4 JD	331	}
	332
	333	/*
	334	* Return 0 if caller should continue, < 0 if caller should return
	335	* error, > 0 if caller should exit without reporting error.
	336	*/
	337	static int parse_options(int argc, char **argv)
	338	{
	339	poptContext pc;
	340	int opt, ret = 0;
	341
	342	if (argc == 1) {
	343	usage(stdout);
	344	return 1; /* exit cleanly */
	345	}
	346
	347	pc = poptGetContext(NULL, argc, (const char **) argv, long_options, 0);
	348	poptReadDefaultConfig(pc, 0);
	349
	350	while ((opt = poptGetNextOpt(pc)) != -1) {
	351	switch (opt) {
	352	case OPT_HELP:
	353	usage(stdout);
	354	ret = 1; /* exit cleanly */
	355	goto end;
1fc22eb4 JD	356	default:
	357	ret = -EINVAL;
	358	goto end;
	359	}
	360	}
	361
	362	opt_input_path = poptGetArg(pc);
	363	if (!opt_input_path) {
	364	ret = -EINVAL;
	365	goto end;
	366	}
	367	end:
	368	if (pc) {
	369	poptFreeContext(pc);
	370	}
	371	return ret;
	372	}
	373
	374	void iter_trace(struct bt_context *bt_ctx)
	375	{
	376	struct bt_ctf_iter *iter;
	377	struct bt_iter_pos begin_pos;
4adc8274	378	const struct bt_ctf_event *event;
1fc22eb4 JD	379	int ret = 0;
	380
	381	begin_pos.type = BT_SEEK_BEGIN;
	382	iter = bt_ctf_iter_create(bt_ctx, &begin_pos, NULL);
	383
	384	/* at each event check if we need to refresh */
	385	bt_ctf_iter_add_callback(iter, 0, NULL, 0,
	386	check_timestamp,
	387	NULL, NULL, NULL);
	388	/* at each event, verify the status of the process table */
	389	bt_ctf_iter_add_callback(iter, 0, NULL, 0,
	390	fix_process_table,
	391	NULL, NULL, NULL);
	392	/* to handle the scheduling events */
	393	bt_ctf_iter_add_callback(iter,
	394	g_quark_from_static_string("sched_switch"),
	395	NULL, 0, handle_sched_switch, NULL, NULL, NULL);
	396	/* to clean up the process table */
	397	bt_ctf_iter_add_callback(iter,
	398	g_quark_from_static_string("sched_process_free"),
	399	NULL, 0, handle_sched_process_free, NULL, NULL, NULL);
928f18a6 MB	400	/* to get all the process from the statedumps */
	401	bt_ctf_iter_add_callback(iter,
	402	g_quark_from_static_string(
	403	"lttng_statedump_process_state"),
	404	NULL, 0, handle_statedump_process_state,
	405	NULL, NULL, NULL);
1fc22eb4 JD	406
	407	/* for IO top */
	408	bt_ctf_iter_add_callback(iter,
	409	g_quark_from_static_string("exit_syscall"),
	410	NULL, 0, handle_exit_syscall, NULL, NULL, NULL);
	411	bt_ctf_iter_add_callback(iter,
	412	g_quark_from_static_string("sys_write"),
	413	NULL, 0, handle_sys_write, NULL, NULL, NULL);
	414	bt_ctf_iter_add_callback(iter,
	415	g_quark_from_static_string("sys_read"),
	416	NULL, 0, handle_sys_read, NULL, NULL, NULL);
b093de8a MB	417	bt_ctf_iter_add_callback(iter,
	418	g_quark_from_static_string("sys_open"),
	419	NULL, 0, handle_sys_open, NULL, NULL, NULL);
b093de8a MB	420	bt_ctf_iter_add_callback(iter,
	421	g_quark_from_static_string("sys_close"),
	422	NULL, 0, handle_sys_close, NULL, NULL, NULL);
ceb3a221 MB	423	bt_ctf_iter_add_callback(iter,
	424	g_quark_from_static_string(
	425	"lttng_statedump_file_descriptor"),
	426	NULL, 0, handle_statedump_file_descriptor,
	427	NULL, NULL, NULL);
59288610	428
1fc22eb4 JD	429	while ((event = bt_ctf_iter_read_event(iter)) != NULL) {
	430	ret = bt_iter_next(bt_ctf_get_iter(iter));
	431	if (ret < 0)
	432	goto end_iter;
	433	}
	434
	435	/* block until quit, we reached the end of the trace */
	436	sem_wait(&end_trace_sem);
	437
	438	end_iter:
06570214	439	bt_ctf_iter_destroy(iter);
1fc22eb4 JD	440	}
	441
	442	/*
	443	* bt_context_add_traces_recursive: Open a trace recursively
	444	* (copied from BSD code in converter/babeltrace.c)
	445	*
	446	* Find each trace present in the subdirectory starting from the given
	447	* path, and add them to the context. The packet_seek parameter can be
	448	* NULL: this specify to use the default format packet_seek.
	449	*
	450	* Return: 0 on success, nonzero on failure.
	451	* Unable to open toplevel: failure.
	452	* Unable to open some subdirectory or file: warn and continue;
	453	*/
	454	int bt_context_add_traces_recursive(struct bt_context ctx, const char path,
	455	const char *format_str,
	456	void (packet_seek)(struct stream_pos pos,
	457	size_t offset, int whence))
	458	{
	459	FTS *tree;
	460	FTSENT *node;
	461	GArray *trace_ids;
	462	char lpath[PATH_MAX];
	463	char * const paths[2] = { lpath, NULL };
0d567cf1	464	int ret = -1;
1fc22eb4 JD	465
	466	/*
	467	* Need to copy path, because fts_open can change it.
	468	* It is the pointer array, not the strings, that are constant.
	469	*/
	470	strncpy(lpath, path, PATH_MAX);
	471	lpath[PATH_MAX - 1] = '\0';
	472
	473	tree = fts_open(paths, FTS_NOCHDIR \| FTS_LOGICAL, 0);
	474	if (tree == NULL) {
	475	fprintf(stderr, "[error] [Context] Cannot traverse \"%s\" for reading.\n",
	476	path);
	477	return -EINVAL;
	478	}
	479
	480	trace_ids = g_array_new(FALSE, TRUE, sizeof(int));
	481
	482	while ((node = fts_read(tree))) {
	483	int dirfd, metafd;
	484
	485	if (!(node->fts_info & FTS_D))
	486	continue;
	487
	488	dirfd = open(node->fts_accpath, 0);
	489	if (dirfd < 0) {
	490	fprintf(stderr, "[error] [Context] Unable to open trace "
	491	"directory file descriptor.\n");
	492	ret = dirfd;
	493	goto error;
	494	}
	495	metafd = openat(dirfd, "metadata", O_RDONLY);
	496	if (metafd < 0) {
7314c855 JD	497	close(dirfd);
	498	ret = -1;
	499	continue;
1fc22eb4 JD	500	} else {
	501	int trace_id;
	502
	503	ret = close(metafd);
	504	if (ret < 0) {
	505	perror("close");
	506	goto error;
	507	}
	508	ret = close(dirfd);
	509	if (ret < 0) {
	510	perror("close");
	511	goto error;
	512	}
	513
	514	trace_id = bt_context_add_trace(ctx,
	515	node->fts_accpath, format_str,
	516	packet_seek, NULL, NULL);
	517	if (trace_id < 0) {
0d567cf1	518	fprintf(stderr, "[warning] [Context] opening trace \"%s\" from %s "
1fc22eb4	519	"for reading.\n", node->fts_accpath, path);
0d567cf1 JD	520	/* Allow to skip erroneous traces. */
0d567cf1 JD	521	continue;
1fc22eb4 JD	522	}
	523	g_array_append_val(trace_ids, trace_id);
	524	}
	525	}
	526
	527	g_array_free(trace_ids, TRUE);
0d567cf1	528	return ret;
1fc22eb4 JD	529
	530	error:
	531	return ret;
	532	}
	533
4553b4d1	534	static int check_field_requirements(const struct bt_ctf_field_decl const field_list,
a54d0d2c JD	535	int field_cnt, int tid_check, int pid_check,
	536	int procname_check, int ppid_check)
	537	{
	538	int j;
	539
	540	for (j = 0; j < field_cnt; j++) {
	541	if (*tid_check == 0) {
	542	if (strncmp(bt_ctf_get_decl_field_name(field_list[j]), "tid", 3) == 0) {
	543	(*tid_check)++;
	544	}
	545	}
	546	if (*pid_check == 0) {
	547	if (strncmp(bt_ctf_get_decl_field_name(field_list[j]), "pid", 3) == 0)
	548	(*pid_check)++;
	549	}
	550	if (*ppid_check == 0) {
	551	if (strncmp(bt_ctf_get_decl_field_name(field_list[j]), "ppid", 4) == 0)
	552	(*ppid_check)++;
	553	}
	554	if (*procname_check == 0) {
	555	if (strncmp(bt_ctf_get_decl_field_name(field_list[j]), "procname", 8) == 0)
	556	(*procname_check)++;
	557	}
	558	}
	559	/* if all checks are OK, no need to continue the checks */
	560	if (tid_check == 1 && pid_check == 1 && *ppid_check == 1 &&
	561	*procname_check == 1)
	562	return 0;
	563
	564	return -1;
	565	}
	566
	567	/*
	568	* check_requirements: check if the required context informations are available
	569	*
	570	* If each mandatory context information is available for at least in one
	571	* event, return 0 otherwise return -1.
a54d0d2c JD	572	*/
	573	int check_requirements(struct bt_context *ctx)
	574	{
	575	unsigned int i, evt_cnt, field_cnt;
	576	struct bt_ctf_event_decl const evt_list;
	577	const struct bt_ctf_field_decl const field_list;
	578	int tid_check = 0;
	579	int pid_check = 0;
	580	int procname_check = 0;
	581	int ppid_check = 0;
	582	int ret = 0;
	583
	584	bt_ctf_get_event_decl_list(0, ctx, &evt_list, &evt_cnt);
	585	for (i = 0; i < evt_cnt; i++) {
	586	bt_ctf_get_decl_fields(evt_list[i], BT_STREAM_EVENT_CONTEXT,
	587	&field_list, &field_cnt);
	588	ret = check_field_requirements(field_list, field_cnt,
	589	&tid_check, &pid_check, &procname_check,
	590	&ppid_check);
	591	if (ret == 0)
	592	goto end;
	593
	594	bt_ctf_get_decl_fields(evt_list[i], BT_EVENT_CONTEXT,
	595	&field_list, &field_cnt);
	596	ret = check_field_requirements(field_list, field_cnt,
	597	&tid_check, &pid_check, &procname_check,
	598	&ppid_check);
	599	if (ret == 0)
	600	goto end;
	601
	602	bt_ctf_get_decl_fields(evt_list[i], BT_STREAM_PACKET_CONTEXT,
	603	&field_list, &field_cnt);
	604	ret = check_field_requirements(field_list, field_cnt,
	605	&tid_check, &pid_check, &procname_check,
	606	&ppid_check);
	607	if (ret == 0)
	608	goto end;
	609	}
	610
	611	if (tid_check == 0) {
	612	ret = -1;
	613	fprintf(stderr, "[error] missing tid context information\n");
	614	}
	615	if (pid_check == 0) {
	616	ret = -1;
	617	fprintf(stderr, "[error] missing pid context information\n");
	618	}
	619	if (ppid_check == 0) {
	620	ret = -1;
	621	fprintf(stderr, "[error] missing ppid context information\n");
	622	}
	623	if (procname_check == 0) {
	624	ret = -1;
	625	fprintf(stderr, "[error] missing procname context information\n");
	626	}
	627
	628	end:
	629	return ret;
	630	}
	631
1fc22eb4 JD	632	int main(int argc, char **argv)
	633	{
	634	int ret;
	635	struct bt_context *bt_ctx = NULL;
	636
	637	ret = parse_options(argc, argv);
	638	if (ret < 0) {
	639	fprintf(stdout, "Error parsing options.\n\n");
	640	usage(stdout);
	641	exit(EXIT_FAILURE);
	642	} else if (ret > 0) {
	643	exit(EXIT_SUCCESS);
	644	}
	645
	646	init_lttngtop();
	647
	648	bt_ctx = bt_context_create();
	649	ret = bt_context_add_traces_recursive(bt_ctx, opt_input_path, "ctf", NULL);
	650	if (ret < 0) {
a54d0d2c JD	651	fprintf(stderr, "[error] Opening the trace\n");
	652	goto end;
	653	}
	654
	655	ret = check_requirements(bt_ctx);
	656	if (ret < 0) {
6ff9c173	657	fprintf(stderr, "[error] some mandatory contexts were missing, exiting.\n");
1fc22eb4 JD	658	goto end;
	659	}
	660
	661	pthread_create(&display_thread, NULL, ncurses_display, (void *) NULL);
	662	pthread_create(&timer_thread, NULL, refresh_thread, (void *) NULL);
	663
	664	iter_trace(bt_ctx);
	665
	666	quit = 1;
	667	pthread_join(display_thread, NULL);
85db4618	668	pthread_join(timer_thread, NULL);
1fc22eb4 JD	669
1fc22eb4 JD	670	end:
85db4618	671	bt_context_put(bt_ctx);
1fc22eb4 JD	672	return 0;
1fc22eb4 JD	673	}