[lttngtop.git] / src / lttngtop.c

/*
 * Copyright (C) 2011 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);
	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(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;

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;

	/* 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;
	}
	comm = get_context_comm(call_data);
	if (!comm) {
//		fprintf(stderr, "Missing procname context info\n");
		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();
	lttngtop.perf_list = 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;
			case OPT_LIST:
			//	list_formats(stdout);
				ret = 1;
				goto end;
			case OPT_VERBOSE:
//				babeltrace_verbose = 1;
				break;
			case OPT_DEBUG:
//				babeltrace_debug = 1;
				break;
			case OPT_NAMES:
//				opt_field_names = 1;
				break;
			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) {
			ret = close(dirfd);
			if (ret < 0) {
				perror("close");
				goto error;
			}
		} 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] missing mandatory context informations\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 JD	1	/*
	2	* Copyright (C) 2011 Julien Desfossez
	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);
	91	init_ncurses();
	92
	93	while (1) {
	94	sem_wait(&timer);
	95	sem_wait(&goodtodisplay);
	96	sem_wait(&pause_sem);
	97
	98	copy = g_ptr_array_index(copies, current_display_index);
85db4618 JD	99	assert(copy);
85db4618 JD	100	display(current_display_index++);
1fc22eb4 JD	101
	102	sem_post(&goodtoupdate);
	103	sem_post(&pause_sem);
	104
	105	if (quit) {
	106	reset_ncurses();
	107	pthread_exit(0);
	108	}
	109	}
	110	}
	111
	112	/*
	113	* hook on each event to check the timestamp and refresh the display if
	114	* necessary
	115	*/
4adc8274	116	enum bt_cb_ret check_timestamp(struct bt_ctf_event call_data, void private_data)
1fc22eb4 JD	117	{
	118	unsigned long timestamp;
	119
	120	timestamp = bt_ctf_get_timestamp(call_data);
	121	if (timestamp == -1ULL)
	122	goto error;
	123
	124	if (last_display_update == 0)
	125	last_display_update = timestamp;
	126
	127	if (timestamp - last_display_update >= refresh_display) {
	128	sem_wait(&goodtoupdate);
	129	g_ptr_array_add(copies, get_copy_lttngtop(last_display_update,
	130	timestamp));
	131	sem_post(&goodtodisplay);
	132	sem_post(&bootstrap);
	133	last_display_update = timestamp;
	134	}
	135	return BT_CB_OK;
	136
	137	error:
	138	fprintf(stderr, "check_timestamp callback error\n");
	139	return BT_CB_ERROR_STOP;
	140	}
	141
	142	/*
	143	* get_perf_counter : get or create and return a perf_counter struct for
	144	* either a process or a cpu (only one of the 2 parameters mandatory)
	145	*/
	146	struct perfcounter get_perf_counter(const char name, struct processtop *proc,
	147	struct cputime *cpu)
	148	{
	149	struct perfcounter ret, global;
	150	GHashTable *table;
	151
	152	if (proc)
	153	table = proc->perf;
	154	else if (cpu)
	155	table = cpu->perf;
	156	else
	157	goto error;
	158
	159	ret = g_hash_table_lookup(table, (gpointer) name);
	160	if (ret)
	161	goto end;
	162
559c9f86	163	ret = g_new0(struct perfcounter, 1);
1fc22eb4 JD	164	/* by default, make it visible in the UI */
1fc22eb4 JD	165	ret->visible = 1;
85db4618	166	g_hash_table_insert(table, (gpointer) strdup(name), ret);
1fc22eb4 JD	167
	168	global = g_hash_table_lookup(lttngtop.perf_list, (gpointer) name);
	169	if (!global) {
559c9f86	170	global = g_new0(struct perfcounter, 1);
1fc22eb4 JD	171	memcpy(global, ret, sizeof(struct perfcounter));
	172	/* by default, sort on the first perf context */
	173	if (g_hash_table_size(lttngtop.perf_list) == 0)
	174	global->sort = 1;
85db4618	175	g_hash_table_insert(lttngtop.perf_list, (gpointer) strdup(name), global);
1fc22eb4 JD	176	}
	177
	178	end:
	179	return ret;
	180
	181	error:
	182	return NULL;
	183	}
	184
	185	void update_perf_value(struct processtop proc, struct cputime cpu,
	186	const char *name, int value)
	187	{
	188	struct perfcounter cpu_perf, process_perf;
	189
	190	cpu_perf = get_perf_counter(name, NULL, cpu);
	191	if (cpu_perf->count < value) {
	192	process_perf = get_perf_counter(name, proc, NULL);
	193	process_perf->count += value - cpu_perf->count;
	194	cpu_perf->count = value;
	195	}
	196	}
	197
4adc8274	198	void extract_perf_counter_scope(const struct bt_ctf_event *event,
3ba84bed	199	const struct definition *scope,
1fc22eb4 JD	200	struct processtop *proc,
	201	struct cputime *cpu)
	202	{
	203	struct definition const * const *list = NULL;
	204	unsigned int count;
	205	int i, ret;
	206
	207	if (!scope)
	208	goto end;
	209
	210	ret = bt_ctf_get_field_list(event, scope, &list, &count);
	211	if (ret < 0)
	212	goto end;
	213
	214	for (i = 0; i < count; i++) {
	215	const char *name = bt_ctf_field_name(list[i]);
6419078d	216	if (strncmp(name, "perf_", 5) == 0) {
1fc22eb4 JD	217	int value = bt_ctf_get_uint64(list[i]);
	218	if (bt_ctf_field_get_error())
	219	continue;
	220	update_perf_value(proc, cpu, name, value);
	221	}
	222	}
	223
	224	end:
	225	return;
	226	}
	227
4adc8274	228	void update_perf_counter(struct processtop proc, const struct bt_ctf_event event)
1fc22eb4	229	{
1fc22eb4	230	struct cputime *cpu;
3ba84bed	231	const struct definition *scope;
1fc22eb4	232
d67167cd	233	cpu = get_cpu(get_cpu_id(event));
1fc22eb4 JD	234
	235	scope = bt_ctf_get_top_level_scope(event, BT_STREAM_EVENT_CONTEXT);
	236	extract_perf_counter_scope(event, scope, proc, cpu);
	237
	238	scope = bt_ctf_get_top_level_scope(event, BT_STREAM_PACKET_CONTEXT);
	239	extract_perf_counter_scope(event, scope, proc, cpu);
	240
	241	scope = bt_ctf_get_top_level_scope(event, BT_EVENT_CONTEXT);
	242	extract_perf_counter_scope(event, scope, proc, cpu);
1fc22eb4 JD	243	}
1fc22eb4 JD	244
4adc8274	245	enum bt_cb_ret fix_process_table(struct bt_ctf_event *call_data,
1fc22eb4 JD	246	void *private_data)
	247	{
	248	int pid, tid, ppid;
	249	char *comm;
	250	struct processtop parent, child;
1fc22eb4 JD	251	unsigned long timestamp;
1fc22eb4 JD	252
85db4618	253	/* FIXME : display nice error when missing context pid, tid, ppid and comm */
1fc22eb4 JD	254
	255	timestamp = bt_ctf_get_timestamp(call_data);
	256	if (timestamp == -1ULL)
	257	goto error;
	258
1dec520a JD	259	pid = get_context_pid(call_data);
1dec520a JD	260	if (pid == -1ULL) {
1fc22eb4 JD	261	// fprintf(stderr, "Missing pid context info\n");
	262	goto error;
	263	}
1dec520a JD	264	tid = get_context_tid(call_data);
1dec520a JD	265	if (tid == -1ULL) {
1fc22eb4 JD	266	// fprintf(stderr, "Missing tid context info\n");
	267	goto error;
	268	}
1dec520a JD	269	ppid = get_context_ppid(call_data);
1dec520a JD	270	if (ppid == -1ULL) {
1fc22eb4 JD	271	// fprintf(stderr, "Missing ppid context info\n");
	272	goto error;
	273	}
1dec520a JD	274	comm = get_context_comm(call_data);
1dec520a JD	275	if (!comm) {
1fc22eb4 JD	276	// fprintf(stderr, "Missing procname context info\n");
	277	goto error;
	278	}
	279
	280	/* find or create the current process */
	281	child = find_process_tid(&lttngtop, tid, comm);
	282	if (!child)
	283	child = add_proc(&lttngtop, tid, comm, timestamp);
	284	update_proc(child, pid, tid, ppid, comm);
	285
	286	if (pid != tid) {
	287	/* find or create the parent */
	288	parent = find_process_tid(&lttngtop, pid, comm);
	289	if (!parent) {
	290	parent = add_proc(&lttngtop, pid, comm, timestamp);
	291	parent->pid = pid;
	292	}
	293
	294	/* attach the parent to the current process */
	295	child->threadparent = parent;
	296	add_thread(parent, child);
	297	}
	298
	299	update_perf_counter(child, call_data);
	300
	301	return BT_CB_OK;
	302
	303	error:
	304	return BT_CB_ERROR_STOP;
	305	}
	306
	307	void init_lttngtop()
	308	{
	309	copies = g_ptr_array_new();
85db4618	310	lttngtop.perf_list = g_hash_table_new(g_str_hash, g_str_equal);
1fc22eb4 JD	311
	312	sem_init(&goodtodisplay, 0, 0);
	313	sem_init(&goodtoupdate, 0, 1);
	314	sem_init(&timer, 0, 1);
	315	sem_init(&bootstrap, 0, 0);
	316	sem_init(&pause_sem, 0, 1);
	317	sem_init(&end_trace_sem, 0, 0);
	318
e05a35a6 JD	319	reset_global_counters();
	320	lttngtop.nbproc = 0;
	321	lttngtop.nbthreads = 0;
	322	lttngtop.nbfiles = 0;
	323
1fc22eb4 JD	324	lttngtop.process_table = g_ptr_array_new();
	325	lttngtop.files_table = g_ptr_array_new();
	326	lttngtop.cpu_table = g_ptr_array_new();
	327	}
	328
c263c4eb	329	void usage(FILE *fp)
1fc22eb4	330	{
c263c4eb JD	331	fprintf(fp, "LTTngTop %s\n\n", VERSION);
c263c4eb JD	332	fprintf(fp, "Usage : lttngtop /path/to/trace\n");
1fc22eb4 JD	333	}
	334
	335	/*
	336	* Return 0 if caller should continue, < 0 if caller should return
	337	* error, > 0 if caller should exit without reporting error.
	338	*/
	339	static int parse_options(int argc, char **argv)
	340	{
	341	poptContext pc;
	342	int opt, ret = 0;
	343
	344	if (argc == 1) {
	345	usage(stdout);
	346	return 1; /* exit cleanly */
	347	}
	348
	349	pc = poptGetContext(NULL, argc, (const char **) argv, long_options, 0);
	350	poptReadDefaultConfig(pc, 0);
	351
	352	while ((opt = poptGetNextOpt(pc)) != -1) {
	353	switch (opt) {
	354	case OPT_HELP:
	355	usage(stdout);
	356	ret = 1; /* exit cleanly */
	357	goto end;
	358	case OPT_LIST:
	359	// list_formats(stdout);
	360	ret = 1;
	361	goto end;
	362	case OPT_VERBOSE:
	363	// babeltrace_verbose = 1;
	364	break;
	365	case OPT_DEBUG:
	366	// babeltrace_debug = 1;
	367	break;
	368	case OPT_NAMES:
	369	// opt_field_names = 1;
	370	break;
	371	default:
	372	ret = -EINVAL;
	373	goto end;
	374	}
	375	}
	376
	377	opt_input_path = poptGetArg(pc);
	378	if (!opt_input_path) {
	379	ret = -EINVAL;
	380	goto end;
	381	}
	382	end:
	383	if (pc) {
	384	poptFreeContext(pc);
	385	}
	386	return ret;
	387	}
	388
	389	void iter_trace(struct bt_context *bt_ctx)
	390	{
	391	struct bt_ctf_iter *iter;
	392	struct bt_iter_pos begin_pos;
4adc8274	393	const struct bt_ctf_event *event;
1fc22eb4 JD	394	int ret = 0;
	395
	396	begin_pos.type = BT_SEEK_BEGIN;
	397	iter = bt_ctf_iter_create(bt_ctx, &begin_pos, NULL);
	398
	399	/* at each event check if we need to refresh */
	400	bt_ctf_iter_add_callback(iter, 0, NULL, 0,
	401	check_timestamp,
	402	NULL, NULL, NULL);
	403	/* at each event, verify the status of the process table */
	404	bt_ctf_iter_add_callback(iter, 0, NULL, 0,
	405	fix_process_table,
	406	NULL, NULL, NULL);
	407	/* to handle the scheduling events */
	408	bt_ctf_iter_add_callback(iter,
	409	g_quark_from_static_string("sched_switch"),
	410	NULL, 0, handle_sched_switch, NULL, NULL, NULL);
	411	/* to clean up the process table */
	412	bt_ctf_iter_add_callback(iter,
	413	g_quark_from_static_string("sched_process_free"),
	414	NULL, 0, handle_sched_process_free, NULL, NULL, NULL);
928f18a6 MB	415	/* to get all the process from the statedumps */
	416	bt_ctf_iter_add_callback(iter,
	417	g_quark_from_static_string(
	418	"lttng_statedump_process_state"),
	419	NULL, 0, handle_statedump_process_state,
	420	NULL, NULL, NULL);
1fc22eb4 JD	421
	422	/* for IO top */
	423	bt_ctf_iter_add_callback(iter,
	424	g_quark_from_static_string("exit_syscall"),
	425	NULL, 0, handle_exit_syscall, NULL, NULL, NULL);
	426	bt_ctf_iter_add_callback(iter,
	427	g_quark_from_static_string("sys_write"),
	428	NULL, 0, handle_sys_write, NULL, NULL, NULL);
	429	bt_ctf_iter_add_callback(iter,
	430	g_quark_from_static_string("sys_read"),
	431	NULL, 0, handle_sys_read, NULL, NULL, NULL);
b093de8a MB	432	bt_ctf_iter_add_callback(iter,
	433	g_quark_from_static_string("sys_open"),
	434	NULL, 0, handle_sys_open, NULL, NULL, NULL);
b093de8a MB	435	bt_ctf_iter_add_callback(iter,
	436	g_quark_from_static_string("sys_close"),
	437	NULL, 0, handle_sys_close, NULL, NULL, NULL);
ceb3a221 MB	438	bt_ctf_iter_add_callback(iter,
	439	g_quark_from_static_string(
	440	"lttng_statedump_file_descriptor"),
	441	NULL, 0, handle_statedump_file_descriptor,
	442	NULL, NULL, NULL);
59288610	443
1fc22eb4 JD	444	while ((event = bt_ctf_iter_read_event(iter)) != NULL) {
	445	ret = bt_iter_next(bt_ctf_get_iter(iter));
	446	if (ret < 0)
	447	goto end_iter;
	448	}
	449
	450	/* block until quit, we reached the end of the trace */
	451	sem_wait(&end_trace_sem);
	452
	453	end_iter:
06570214	454	bt_ctf_iter_destroy(iter);
1fc22eb4 JD	455	}
	456
	457	/*
	458	* bt_context_add_traces_recursive: Open a trace recursively
	459	* (copied from BSD code in converter/babeltrace.c)
	460	*
	461	* Find each trace present in the subdirectory starting from the given
	462	* path, and add them to the context. The packet_seek parameter can be
	463	* NULL: this specify to use the default format packet_seek.
	464	*
	465	* Return: 0 on success, nonzero on failure.
	466	* Unable to open toplevel: failure.
	467	* Unable to open some subdirectory or file: warn and continue;
	468	*/
	469	int bt_context_add_traces_recursive(struct bt_context ctx, const char path,
	470	const char *format_str,
	471	void (packet_seek)(struct stream_pos pos,
	472	size_t offset, int whence))
	473	{
	474	FTS *tree;
	475	FTSENT *node;
	476	GArray *trace_ids;
	477	char lpath[PATH_MAX];
	478	char * const paths[2] = { lpath, NULL };
0d567cf1	479	int ret = -1;
1fc22eb4 JD	480
	481	/*
	482	* Need to copy path, because fts_open can change it.
	483	* It is the pointer array, not the strings, that are constant.
	484	*/
	485	strncpy(lpath, path, PATH_MAX);
	486	lpath[PATH_MAX - 1] = '\0';
	487
	488	tree = fts_open(paths, FTS_NOCHDIR \| FTS_LOGICAL, 0);
	489	if (tree == NULL) {
	490	fprintf(stderr, "[error] [Context] Cannot traverse \"%s\" for reading.\n",
	491	path);
	492	return -EINVAL;
	493	}
	494
	495	trace_ids = g_array_new(FALSE, TRUE, sizeof(int));
	496
	497	while ((node = fts_read(tree))) {
	498	int dirfd, metafd;
	499
	500	if (!(node->fts_info & FTS_D))
	501	continue;
	502
	503	dirfd = open(node->fts_accpath, 0);
	504	if (dirfd < 0) {
	505	fprintf(stderr, "[error] [Context] Unable to open trace "
	506	"directory file descriptor.\n");
	507	ret = dirfd;
	508	goto error;
	509	}
	510	metafd = openat(dirfd, "metadata", O_RDONLY);
	511	if (metafd < 0) {
	512	ret = close(dirfd);
	513	if (ret < 0) {
	514	perror("close");
	515	goto error;
	516	}
	517	} else {
	518	int trace_id;
	519
	520	ret = close(metafd);
	521	if (ret < 0) {
	522	perror("close");
	523	goto error;
	524	}
	525	ret = close(dirfd);
	526	if (ret < 0) {
	527	perror("close");
	528	goto error;
	529	}
	530
	531	trace_id = bt_context_add_trace(ctx,
	532	node->fts_accpath, format_str,
	533	packet_seek, NULL, NULL);
	534	if (trace_id < 0) {
0d567cf1	535	fprintf(stderr, "[warning] [Context] opening trace \"%s\" from %s "
1fc22eb4	536	"for reading.\n", node->fts_accpath, path);
0d567cf1 JD	537	/* Allow to skip erroneous traces. */
0d567cf1 JD	538	continue;
1fc22eb4 JD	539	}
	540	g_array_append_val(trace_ids, trace_id);
	541	}
	542	}
	543
	544	g_array_free(trace_ids, TRUE);
0d567cf1	545	return ret;
1fc22eb4 JD	546
	547	error:
	548	return ret;
	549	}
	550
4553b4d1	551	static int check_field_requirements(const struct bt_ctf_field_decl const field_list,
a54d0d2c JD	552	int field_cnt, int tid_check, int pid_check,
	553	int procname_check, int ppid_check)
	554	{
	555	int j;
	556
	557	for (j = 0; j < field_cnt; j++) {
	558	if (*tid_check == 0) {
	559	if (strncmp(bt_ctf_get_decl_field_name(field_list[j]), "tid", 3) == 0) {
	560	(*tid_check)++;
	561	}
	562	}
	563	if (*pid_check == 0) {
	564	if (strncmp(bt_ctf_get_decl_field_name(field_list[j]), "pid", 3) == 0)
	565	(*pid_check)++;
	566	}
	567	if (*ppid_check == 0) {
	568	if (strncmp(bt_ctf_get_decl_field_name(field_list[j]), "ppid", 4) == 0)
	569	(*ppid_check)++;
	570	}
	571	if (*procname_check == 0) {
	572	if (strncmp(bt_ctf_get_decl_field_name(field_list[j]), "procname", 8) == 0)
	573	(*procname_check)++;
	574	}
	575	}
	576	/* if all checks are OK, no need to continue the checks */
	577	if (tid_check == 1 && pid_check == 1 && *ppid_check == 1 &&
	578	*procname_check == 1)
	579	return 0;
	580
	581	return -1;
	582	}
	583
	584	/*
	585	* check_requirements: check if the required context informations are available
	586	*
	587	* If each mandatory context information is available for at least in one
	588	* event, return 0 otherwise return -1.
a54d0d2c JD	589	*/
	590	int check_requirements(struct bt_context *ctx)
	591	{
	592	unsigned int i, evt_cnt, field_cnt;
	593	struct bt_ctf_event_decl const evt_list;
	594	const struct bt_ctf_field_decl const field_list;
	595	int tid_check = 0;
	596	int pid_check = 0;
	597	int procname_check = 0;
	598	int ppid_check = 0;
	599	int ret = 0;
	600
	601	bt_ctf_get_event_decl_list(0, ctx, &evt_list, &evt_cnt);
	602	for (i = 0; i < evt_cnt; i++) {
	603	bt_ctf_get_decl_fields(evt_list[i], BT_STREAM_EVENT_CONTEXT,
	604	&field_list, &field_cnt);
	605	ret = check_field_requirements(field_list, field_cnt,
	606	&tid_check, &pid_check, &procname_check,
	607	&ppid_check);
	608	if (ret == 0)
	609	goto end;
	610
	611	bt_ctf_get_decl_fields(evt_list[i], BT_EVENT_CONTEXT,
	612	&field_list, &field_cnt);
	613	ret = check_field_requirements(field_list, field_cnt,
	614	&tid_check, &pid_check, &procname_check,
	615	&ppid_check);
	616	if (ret == 0)
	617	goto end;
	618
	619	bt_ctf_get_decl_fields(evt_list[i], BT_STREAM_PACKET_CONTEXT,
	620	&field_list, &field_cnt);
	621	ret = check_field_requirements(field_list, field_cnt,
	622	&tid_check, &pid_check, &procname_check,
	623	&ppid_check);
	624	if (ret == 0)
	625	goto end;
	626	}
	627
	628	if (tid_check == 0) {
	629	ret = -1;
	630	fprintf(stderr, "[error] missing tid context information\n");
	631	}
	632	if (pid_check == 0) {
	633	ret = -1;
	634	fprintf(stderr, "[error] missing pid context information\n");
	635	}
	636	if (ppid_check == 0) {
	637	ret = -1;
	638	fprintf(stderr, "[error] missing ppid context information\n");
	639	}
	640	if (procname_check == 0) {
	641	ret = -1;
	642	fprintf(stderr, "[error] missing procname context information\n");
	643	}
	644
	645	end:
	646	return ret;
	647	}
	648
1fc22eb4 JD	649	int main(int argc, char **argv)
	650	{
	651	int ret;
	652	struct bt_context *bt_ctx = NULL;
	653
	654	ret = parse_options(argc, argv);
	655	if (ret < 0) {
	656	fprintf(stdout, "Error parsing options.\n\n");
	657	usage(stdout);
	658	exit(EXIT_FAILURE);
	659	} else if (ret > 0) {
	660	exit(EXIT_SUCCESS);
	661	}
	662
	663	init_lttngtop();
	664
	665	bt_ctx = bt_context_create();
	666	ret = bt_context_add_traces_recursive(bt_ctx, opt_input_path, "ctf", NULL);
	667	if (ret < 0) {
a54d0d2c JD	668	fprintf(stderr, "[error] Opening the trace\n");
	669	goto end;
	670	}
	671
	672	ret = check_requirements(bt_ctx);
	673	if (ret < 0) {
	674	fprintf(stderr, "[error] missing mandatory context informations\n");
1fc22eb4 JD	675	goto end;
	676	}
	677
	678	pthread_create(&display_thread, NULL, ncurses_display, (void *) NULL);
	679	pthread_create(&timer_thread, NULL, refresh_thread, (void *) NULL);
	680
	681	iter_trace(bt_ctx);
	682
	683	quit = 1;
	684	pthread_join(display_thread, NULL);
85db4618	685	pthread_join(timer_thread, NULL);
1fc22eb4 JD	686
1fc22eb4 JD	687	end:
85db4618	688	bt_context_put(bt_ctx);
1fc22eb4 JD	689	return 0;
1fc22eb4 JD	690	}