[lttngtop.git] / src / common.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.
 */

#include <babeltrace/ctf/events.h>
#include <stdlib.h>
#include <linux/unistd.h>
#include <string.h>
#include "common.h"

uint64_t get_cpu_id(const struct bt_ctf_event *event)
{
	const struct bt_definition *scope;
	uint64_t cpu_id;

	scope = bt_ctf_get_top_level_scope(event, BT_STREAM_PACKET_CONTEXT);
	cpu_id = bt_ctf_get_uint64(bt_ctf_get_field(event, scope, "cpu_id"));
	if (bt_ctf_field_get_error()) {
		fprintf(stderr, "[error] get cpu_id\n");
		return -1ULL;
	}

	return cpu_id;
}

uint64_t get_context_tid(const struct bt_ctf_event *event)
{
	const struct bt_definition *scope;
	uint64_t tid;

	scope = bt_ctf_get_top_level_scope(event, BT_STREAM_EVENT_CONTEXT);
	tid = bt_ctf_get_int64(bt_ctf_get_field(event,
				scope, "_tid"));
	if (bt_ctf_field_get_error()) {
		tid = bt_ctf_get_int64(bt_ctf_get_field(event,
					scope, "_vtid"));
		if (bt_ctf_field_get_error()) {
			fprintf(stderr, "Missing tid context info\n");
			return -1ULL;
		}
	}

	return tid;
}

uint64_t get_context_pid(const struct bt_ctf_event *event)
{
	const struct bt_definition *scope;
	uint64_t pid;

	scope = bt_ctf_get_top_level_scope(event, BT_STREAM_EVENT_CONTEXT);
	pid = bt_ctf_get_int64(bt_ctf_get_field(event,
				scope, "_pid"));
	if (bt_ctf_field_get_error()) {
		/* Try UST pid */
		pid = bt_ctf_get_int64(bt_ctf_get_field(event,
					scope, "_vpid"));
		if (bt_ctf_field_get_error()) {
			fprintf(stderr, "Missing pid context info\n");
			return -1ULL;
		}
	}

	return pid;
}

uint64_t get_context_ppid(const struct bt_ctf_event *event)
{
	const struct bt_definition *scope;
	uint64_t ppid;

	scope = bt_ctf_get_top_level_scope(event, BT_STREAM_EVENT_CONTEXT);
	ppid = bt_ctf_get_int64(bt_ctf_get_field(event,
				scope, "_ppid"));
	if (bt_ctf_field_get_error()) {
		return -1ULL;
	}

	return ppid;
}

uint64_t get_context_vtid(const struct bt_ctf_event *event)
{
	const struct bt_definition *scope;
	uint64_t vtid;

	scope = bt_ctf_get_top_level_scope(event, BT_STREAM_EVENT_CONTEXT);
	vtid = bt_ctf_get_int64(bt_ctf_get_field(event,
				scope, "_vtid"));
	if (bt_ctf_field_get_error()) {
		return -1ULL;
	}

	return vtid;
}

uint64_t get_context_vpid(const struct bt_ctf_event *event)
{
	const struct bt_definition *scope;
	uint64_t vpid;

	scope = bt_ctf_get_top_level_scope(event, BT_STREAM_EVENT_CONTEXT);
	vpid = bt_ctf_get_int64(bt_ctf_get_field(event,
				scope, "_vpid"));
	if (bt_ctf_field_get_error()) {
		return -1ULL;
	}

	return vpid;
}

uint64_t get_context_vppid(const struct bt_ctf_event *event)
{
	const struct bt_definition *scope;
	uint64_t vppid;

	scope = bt_ctf_get_top_level_scope(event, BT_STREAM_EVENT_CONTEXT);
	vppid = bt_ctf_get_int64(bt_ctf_get_field(event,
				scope, "_vppid"));
	if (bt_ctf_field_get_error()) {
		return -1ULL;
	}

	return vppid;
}

char *get_context_comm(const struct bt_ctf_event *event)
{
	const struct bt_definition *scope;
	char *comm;

	scope = bt_ctf_get_top_level_scope(event, BT_STREAM_EVENT_CONTEXT);
	comm = bt_ctf_get_char_array(bt_ctf_get_field(event,
				scope, "_procname"));
	if (bt_ctf_field_get_error()) {
		fprintf(stderr, "Missing comm context info\n");
		return NULL;
	}

	return comm;
}

char *get_context_hostname(const struct bt_ctf_event *event)
{
	const struct bt_definition *scope;
	char *hostname;

	scope = bt_ctf_get_top_level_scope(event, BT_STREAM_EVENT_CONTEXT);
	hostname = bt_ctf_get_char_array(bt_ctf_get_field(event,
				scope, "_hostname"));
	if (bt_ctf_field_get_error()) {
		return NULL;
	}

	return hostname;
}

/*
 * To get the parent process, put the pid in the tid field
 * because the parent process gets pid = tid
 */
struct processtop *find_process_tid(struct lttngtop *ctx, int tid, const char *comm)
{
	struct processtop *tmp;

	tmp = g_hash_table_lookup(ctx->process_hash_table,
			(gconstpointer) (unsigned long) tid);

	return tmp;
}

struct processtop* add_proc(struct lttngtop *ctx, int tid, char *comm,
		unsigned long timestamp, char *hostname)
{
	struct processtop *newproc;
	struct host *host;

	/* if the PID already exists, we just rename the process */
	/* FIXME : need to integrate with clone/fork/exit to be accurate */
	newproc = find_process_tid(ctx, tid, comm);

	if (!newproc) {
		newproc = g_new0(struct processtop, 1);
		newproc->tid = tid;
		newproc->birth = timestamp;
		newproc->process_files_table = g_ptr_array_new();
		newproc->files_history = NULL;
		newproc->totalfileread = 0;
		newproc->totalfilewrite = 0;
		newproc->fileread = 0;
		newproc->filewrite = 0;
		newproc->syscall_info = NULL;
		newproc->threadparent = NULL;
		newproc->threads = g_ptr_array_new();
		newproc->perf = g_hash_table_new(g_str_hash, g_str_equal);
		g_ptr_array_add(ctx->process_table, newproc);
		g_hash_table_insert(ctx->process_hash_table,
				(gpointer) (unsigned long) tid, newproc);
		if (lookup_tid_list(tid)) {
			add_filter_tid_list(newproc);
		}
		ctx->nbnewthreads++;
		ctx->nbthreads++;
	}
	newproc->comm = strdup(comm);
	if (hostname) {
		host = lookup_hostname_list(hostname);
		if (!host)
			host = add_hostname_list(hostname, 0);
		if (!newproc->host || (newproc->host != host))
			newproc->host = host;
		if (is_hostname_filtered(hostname)) {
			add_filter_tid_list(newproc);
		}
	}

	return newproc;
}

struct processtop* update_proc(struct processtop* proc, int pid, int tid,
		int ppid, int vpid, int vtid, int vppid, char *comm, char *hostname)
{
	struct host *host;

	if (proc) {
		proc->pid = pid;
		proc->tid = tid;
		proc->ppid = ppid;
		proc->vpid = vpid;
		proc->vtid = vtid;
		proc->vppid = vppid;
		if (strcmp(proc->comm, comm) != 0) {
			free(proc->comm);
			proc->comm = strdup(comm);
		}
		if (hostname && !proc->host) {
			host = lookup_hostname_list(hostname);
			if (!host)
				host = add_hostname_list(hostname, 0);
			if (!proc->host || (proc->host != host))
				proc->host = host;
			if (is_hostname_filtered(hostname)) {
				add_filter_tid_list(proc);
			}
		}
	}
	return proc;
}

/*
 * This function just sets the time of death of a process.
 * When we rotate the cputime we remove it from the process list.
 */
void death_proc(struct lttngtop *ctx, int tid, char *comm,
		unsigned long timestamp)
{
	struct processtop *tmp;
	tmp = find_process_tid(ctx, tid, comm);

	g_hash_table_remove(ctx->process_hash_table,
			(gpointer) (unsigned long) tid);
	if (tmp && strcmp(tmp->comm, comm) == 0) {
		tmp->death = timestamp;
		ctx->nbdeadthreads++;
		ctx->nbthreads--;
	}
}

struct processtop* get_proc(struct lttngtop *ctx, int tid, char *comm,
		unsigned long timestamp, char *hostname)
{
	struct processtop *tmp;

	tmp = find_process_tid(ctx, tid, comm);
	if (tmp && strcmp(tmp->comm, comm) == 0) {
		return tmp;
	}
	return add_proc(ctx, tid, comm, timestamp, hostname);
}

struct processtop *get_proc_pid(struct lttngtop *ctx, int tid, int pid,
		unsigned long timestamp, char *hostname)
{
	struct processtop *tmp;
	tmp = find_process_tid(ctx, tid, NULL);
	if (tmp && tmp->pid == pid)
		return tmp;
	return add_proc(ctx, tid, "Unknown", timestamp, hostname);
}

void add_thread(struct processtop *parent, struct processtop *thread)
{
	gint i;
	struct processtop *tmp;

	if (!parent)
		return;

	for (i = 0; i < parent->threads->len; i++) {
		tmp = g_ptr_array_index(parent->threads, i);
		if (tmp == thread)
			return;
	}
	g_ptr_array_add(parent->threads, thread);
}

struct cputime* add_cpu(int cpu)
{
	struct cputime *newcpu;

	newcpu = g_new0(struct cputime, 1);
	newcpu->id = cpu;
	newcpu->current_task = NULL;
	newcpu->perf = g_hash_table_new(g_str_hash, g_str_equal);

	g_ptr_array_add(lttngtop.cpu_table, newcpu);

	return newcpu;
}
struct cputime* get_cpu(int cpu)
{
	gint i;
	struct cputime *tmp;

	for (i = 0; i < lttngtop.cpu_table->len; i++) {
		tmp = g_ptr_array_index(lttngtop.cpu_table, i);
		if (tmp->id == cpu)
			return tmp;
	}

	return add_cpu(cpu);
}

/*
 * At the end of a sampling period, we need to display the cpu time for each
 * process and to reset it to zero for the next period
 */
void rotate_cputime(unsigned long end)
{
	gint i;
	struct cputime *tmp;
	unsigned long elapsed;

	for (i = 0; i < lttngtop.cpu_table->len; i++) {
		tmp = g_ptr_array_index(lttngtop.cpu_table, i);
		elapsed = end - tmp->task_start;
		if (tmp->current_task) {
			tmp->current_task->totalcpunsec += elapsed;
			tmp->current_task->threadstotalcpunsec += elapsed;
			if (tmp->current_task->pid != tmp->current_task->tid &&
					tmp->current_task->threadparent) {
				tmp->current_task->threadparent->threadstotalcpunsec += elapsed;
			}
		}
		tmp->task_start = end;
	}
}

void reset_perf_counter(gpointer key, gpointer value, gpointer user_data)
{
	((struct perfcounter*) value)->count = 0;
}

void copy_perf_counter(gpointer key, gpointer value, gpointer new_table)
{
	struct perfcounter *newperf;

	newperf = g_new0(struct perfcounter, 1);
	newperf->count = ((struct perfcounter *) value)->count;
	newperf->visible = ((struct perfcounter *) value)->visible;
	newperf->sort = ((struct perfcounter *) value)->sort;
	g_hash_table_insert((GHashTable *) new_table, strdup(key), newperf);
}

void copy_process_table(gpointer key, gpointer value, gpointer new_table)
{
	g_hash_table_insert((GHashTable *) new_table, key, value);
}

void rotate_perfcounter() {
	int i;
	struct processtop *tmp;

	for (i = 0; i < lttngtop.process_table->len; i++) {
		tmp = g_ptr_array_index(lttngtop.process_table, i);
		g_hash_table_foreach(tmp->perf, reset_perf_counter, NULL);
	}
}

void cleanup_processtop()
{
	gint i, j;
	struct processtop *tmp;
	struct files *tmpf; /* a temporary file */

	for (i = 0; i < lttngtop.process_table->len; i++) {
		tmp = g_ptr_array_index(lttngtop.process_table, i);
		tmp->totalcpunsec = 0;
		tmp->threadstotalcpunsec = 0;
		tmp->fileread = 0;
		tmp->filewrite = 0;

		for (j = 0; j < tmp->process_files_table->len; j++) {
			tmpf = g_ptr_array_index(tmp->process_files_table, j);
			if (tmpf != NULL) {
				tmpf->read = 0;
				tmpf->write = 0;

				if (tmpf->flag == __NR_close)
					g_ptr_array_index(
						tmp->process_files_table, j
					) = NULL;
			}
		}
	}
}

void reset_global_counters()
{
	lttngtop.nbnewproc = 0;
	lttngtop.nbdeadproc = 0;
	lttngtop.nbnewthreads = 0;
	lttngtop.nbdeadthreads = 0;
	lttngtop.nbnewfiles = 0;
	lttngtop.nbclosedfiles = 0;
}

void copy_global_counters(struct lttngtop *dst)
{
	dst->nbproc = lttngtop.nbproc;
	dst->nbnewproc = lttngtop.nbnewproc;
	dst->nbdeadproc = lttngtop.nbdeadproc;
	dst->nbthreads = lttngtop.nbthreads;
	dst->nbnewthreads = lttngtop.nbnewthreads;
	dst->nbdeadthreads = lttngtop.nbdeadthreads;
	dst->nbfiles = lttngtop.nbfiles;
	dst->nbnewfiles = lttngtop.nbnewfiles;
	dst->nbclosedfiles = lttngtop.nbclosedfiles;
	reset_global_counters();
}

struct lttngtop* get_copy_lttngtop(unsigned long start, unsigned long end)
{
	gint i, j;
	unsigned long time;
	struct lttngtop *dst;
	struct processtop *tmp, *tmp2, *new;
	struct cputime *tmpcpu, *newcpu;
	struct files *tmpfile, *newfile;
	struct kprobes *tmpprobe, *newprobe;

	dst = g_new0(struct lttngtop, 1);
	dst->start = start;
	dst->end = end;
	copy_global_counters(dst);
	dst->process_table = g_ptr_array_new();
	dst->files_table = g_ptr_array_new();
	dst->cpu_table = g_ptr_array_new();
	dst->kprobes_table = g_ptr_array_new();
	dst->process_hash_table = g_hash_table_new(g_direct_hash, g_direct_equal);
	g_hash_table_foreach(lttngtop.process_hash_table, copy_process_table,
			dst->process_hash_table);

	rotate_cputime(end);

	for (i = 0; i < lttngtop.process_table->len; i++) {
		tmp = g_ptr_array_index(lttngtop.process_table, i);
		new = g_new0(struct processtop, 1);

		memcpy(new, tmp, sizeof(struct processtop));
		new->threads = g_ptr_array_new();
		new->comm = strdup(tmp->comm);
		new->process_files_table = g_ptr_array_new();
		new->files_history = tmp->files_history;
		new->perf = g_hash_table_new(g_str_hash, g_str_equal);
		g_hash_table_foreach(tmp->perf, copy_perf_counter, new->perf);

		/* compute the stream speed */
		if (end - start != 0) {
			time = (end - start) / NSEC_PER_SEC;
			new->fileread = new->fileread/(time);
			new->filewrite = new->filewrite/(time);
		}

		for (j = 0; j < tmp->process_files_table->len; j++) {
			tmpfile = g_ptr_array_index(tmp->process_files_table, j);

			newfile = malloc(sizeof(struct files));

			if (tmpfile != NULL) {
				memcpy(newfile, tmpfile, sizeof(struct files));
				newfile->name = strdup(tmpfile->name);
				newfile->ref = new;
				g_ptr_array_add(new->process_files_table,
						newfile);
				g_ptr_array_add(dst->files_table, newfile);
			} else {
				g_ptr_array_add(new->process_files_table, NULL);
				g_ptr_array_add(dst->files_table, NULL);
			}
			/*
			 * if the process died during the last period, we remove all
			 * files associated with if after the copy
			 */
			if (tmp->death > 0 && tmp->death < end) {
				/* FIXME : close the files before */
				g_ptr_array_remove(tmp->process_files_table, tmpfile);
				g_free(tmpfile);
			}
		}
		g_ptr_array_add(dst->process_table, new);

		/*
		 * if the process died during the last period, we remove it from
		 * the current process list after the copy
		 */
		if (tmp->death > 0 && tmp->death < end) {
			g_ptr_array_remove(lttngtop.process_table, tmp);
			/* FIXME : TRUE does not mean clears the object in it */
			g_ptr_array_free(tmp->threads, TRUE);
			free(tmp->comm);
			g_ptr_array_free(tmp->process_files_table, TRUE);
			/* FIXME : clear elements */
			g_hash_table_destroy(tmp->perf);
			g_free(tmp);
		}
	}
	rotate_perfcounter();

	for (i = 0; i < lttngtop.cpu_table->len; i++) {
		tmpcpu = g_ptr_array_index(lttngtop.cpu_table, i);
		newcpu = g_new0(struct cputime, 1);
		memcpy(newcpu, tmpcpu, sizeof(struct cputime));
		newcpu->perf = g_hash_table_new(g_str_hash, g_str_equal);
		g_hash_table_foreach(tmpcpu->perf, copy_perf_counter, newcpu->perf);
		/*
		 * note : we don't care about the current process pointer in the copy
		 * so the reference is invalid after the memcpy
		 */
		g_ptr_array_add(dst->cpu_table, newcpu);
	}
	if (lttngtop.kprobes_table) {
		for (i = 0; i < lttngtop.kprobes_table->len; i++) {
			tmpprobe = g_ptr_array_index(lttngtop.kprobes_table, i);
			newprobe = g_new0(struct kprobes, 1);
			memcpy(newprobe, tmpprobe, sizeof(struct kprobes));
			tmpprobe->count = 0;
			g_ptr_array_add(dst->kprobes_table, newprobe);
		}
	}
	/* FIXME : better algo */
	/* create the threads index if required */
	for (i = 0; i < dst->process_table->len; i++) {
		tmp = g_ptr_array_index(dst->process_table, i);
		if (tmp->pid == tmp->tid) {
			for (j = 0; j < dst->process_table->len; j++) {
				tmp2 = g_ptr_array_index(dst->process_table, j);
				if (tmp2->pid == tmp->pid) {
					tmp2->threadparent = tmp;
					g_ptr_array_add(tmp->threads, tmp2);
				}
			}
		}
	}

	//  update_global_stats(dst);
	cleanup_processtop();

	return dst;
}


enum bt_cb_ret handle_statedump_process_state(struct bt_ctf_event *call_data,
		void *private_data)
{
	const struct bt_definition *scope;
	struct processtop *proc;
	unsigned long timestamp;
	int64_t pid, tid, ppid, vtid, vpid, vppid;
	char *procname, *hostname = NULL;

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

	scope = bt_ctf_get_top_level_scope(call_data,
			 BT_EVENT_FIELDS);
	pid = bt_ctf_get_int64(bt_ctf_get_field(call_data,
			     scope, "_pid"));
	if (bt_ctf_field_get_error()) {
		fprintf(stderr, "Missing pid context info\n");
		goto error;
	}
	ppid = bt_ctf_get_int64(bt_ctf_get_field(call_data,
				scope, "_ppid"));
	if (bt_ctf_field_get_error()) {
		goto end;
	}
	tid = bt_ctf_get_int64(bt_ctf_get_field(call_data,
				scope, "_tid"));
	if (bt_ctf_field_get_error()) {
		fprintf(stderr, "Missing tid context info\n");
		goto error;
	}
	vtid = bt_ctf_get_int64(bt_ctf_get_field(call_data,
				scope, "_vtid"));
	if (bt_ctf_field_get_error()) {
		fprintf(stderr, "Missing vtid context info\n");
		goto error;
	}
	vpid = bt_ctf_get_int64(bt_ctf_get_field(call_data,
				scope, "_vpid"));
	if (bt_ctf_field_get_error()) {
		fprintf(stderr, "Missing vpid context info\n");
		goto error;
	}
	vppid = bt_ctf_get_int64(bt_ctf_get_field(call_data,
				scope, "_vppid"));
	if (bt_ctf_field_get_error()) {
		fprintf(stderr, "Missing vppid context info\n");
		goto error;
	}

	scope = bt_ctf_get_top_level_scope(call_data,
			BT_EVENT_FIELDS);
	procname = bt_ctf_get_char_array(bt_ctf_get_field(call_data,
				scope, "_name"));
	if (bt_ctf_field_get_error()) {
		fprintf(stderr, "Missing process name context info\n");
		goto error;
	}

	proc = find_process_tid(&lttngtop, tid, procname);
	if (proc == NULL)
		proc = add_proc(&lttngtop, tid, procname, timestamp, hostname);
	update_proc(proc, pid, tid, ppid, vpid, vtid, vppid, procname, hostname);

	if (proc) {
		free(proc->comm);
		proc->comm = strdup(procname);
		proc->pid = pid;
	}

end:
	return BT_CB_OK;

error:
	return BT_CB_ERROR_STOP;
}

struct tm format_timestamp(uint64_t timestamp)
{
	struct tm tm;
	uint64_t ts_sec = 0, ts_nsec;
	time_t time_s;

	ts_nsec = timestamp;
	ts_sec += ts_nsec / NSEC_PER_SEC;
	ts_nsec = ts_nsec % NSEC_PER_SEC;

	time_s = (time_t) ts_sec;

	localtime_r(&time_s, &tm);

	return tm;
}

int *lookup_tid_list(int tid)
{
	if (!tid_filter_list)
		return NULL;

	return g_hash_table_lookup(tid_filter_list, (gpointer) &tid);
}

struct host *lookup_hostname_list(const char *hostname)
{
	if (!hostname || !global_host_list)
		return NULL;

	return g_hash_table_lookup(global_host_list, (gpointer) hostname);
}

int is_hostname_filtered(const char *hostname)
{
	struct host *host;

	host = lookup_hostname_list(hostname);
	if (host)
		return host->filter;
	return 0;
}

int *lookup_filter_tid_list(int tid)
{
	return g_hash_table_lookup(global_filter_list, (gpointer) &tid);
}

void add_filter_tid_list(struct processtop *proc)
{
	unsigned long *hash_tid;

	hash_tid = malloc(sizeof(unsigned long));
	*hash_tid = proc->tid;
	g_hash_table_insert(global_filter_list,
			(gpointer) (unsigned long) hash_tid, proc);
}

void remove_filter_tid_list(int tid)
{
	g_hash_table_remove(global_filter_list,
			(gpointer) (unsigned long) &tid);
}

struct host *add_hostname_list(char *hostname, int filter)
{
	struct host *host;

	host = lookup_hostname_list(hostname);
	if (host)
		return host;

	host = g_new0(struct host, 1);
	host->hostname = strdup(hostname);
	host->filter = filter;
	g_hash_table_insert(global_host_list,
			(gpointer) host->hostname,
			(gpointer) host);

	return host;
}

void update_hostname_filter(struct host *host)
{
	struct processtop *tmp;
	int i;

	for (i = 0; i < lttngtop.process_table->len; i++) {
		tmp = g_ptr_array_index(lttngtop.process_table, i);
		if (tmp->host == host) {
			if (host->filter)
				add_filter_tid_list(tmp);
			else
				remove_filter_tid_list(tmp->tid);
		}
	}
}
Commit	Line	Data
	1	/*
	2	* Copyright (C) 2011-2012 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	*
	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.
	16	*/
	17
	18	#include <babeltrace/ctf/events.h>
	19	#include <stdlib.h>
	20	#include <linux/unistd.h>
	21	#include <string.h>
	22	#include "common.h"
	23
	24	uint64_t get_cpu_id(const struct bt_ctf_event *event)
	25	{
	26	const struct bt_definition *scope;
	27	uint64_t cpu_id;
	28
	29	scope = bt_ctf_get_top_level_scope(event, BT_STREAM_PACKET_CONTEXT);
	30	cpu_id = bt_ctf_get_uint64(bt_ctf_get_field(event, scope, "cpu_id"));
	31	if (bt_ctf_field_get_error()) {
	32	fprintf(stderr, "[error] get cpu_id\n");
	33	return -1ULL;
	34	}
	35
	36	return cpu_id;
	37	}
	38
	39	uint64_t get_context_tid(const struct bt_ctf_event *event)
	40	{
	41	const struct bt_definition *scope;
	42	uint64_t tid;
	43
	44	scope = bt_ctf_get_top_level_scope(event, BT_STREAM_EVENT_CONTEXT);
	45	tid = bt_ctf_get_int64(bt_ctf_get_field(event,
	46	scope, "_tid"));
	47	if (bt_ctf_field_get_error()) {
	48	tid = bt_ctf_get_int64(bt_ctf_get_field(event,
	49	scope, "_vtid"));
	50	if (bt_ctf_field_get_error()) {
	51	fprintf(stderr, "Missing tid context info\n");
	52	return -1ULL;
	53	}
	54	}
	55
	56	return tid;
	57	}
	58
	59	uint64_t get_context_pid(const struct bt_ctf_event *event)
	60	{
	61	const struct bt_definition *scope;
	62	uint64_t pid;
	63
	64	scope = bt_ctf_get_top_level_scope(event, BT_STREAM_EVENT_CONTEXT);
	65	pid = bt_ctf_get_int64(bt_ctf_get_field(event,
	66	scope, "_pid"));
	67	if (bt_ctf_field_get_error()) {
	68	/* Try UST pid */
	69	pid = bt_ctf_get_int64(bt_ctf_get_field(event,
	70	scope, "_vpid"));
	71	if (bt_ctf_field_get_error()) {
	72	fprintf(stderr, "Missing pid context info\n");
	73	return -1ULL;
	74	}
	75	}
	76
	77	return pid;
	78	}
	79
	80	uint64_t get_context_ppid(const struct bt_ctf_event *event)
	81	{
	82	const struct bt_definition *scope;
	83	uint64_t ppid;
	84
	85	scope = bt_ctf_get_top_level_scope(event, BT_STREAM_EVENT_CONTEXT);
	86	ppid = bt_ctf_get_int64(bt_ctf_get_field(event,
	87	scope, "_ppid"));
	88	if (bt_ctf_field_get_error()) {
	89	return -1ULL;
	90	}
	91
	92	return ppid;
	93	}
	94
	95	uint64_t get_context_vtid(const struct bt_ctf_event *event)
	96	{
	97	const struct bt_definition *scope;
	98	uint64_t vtid;
	99
	100	scope = bt_ctf_get_top_level_scope(event, BT_STREAM_EVENT_CONTEXT);
	101	vtid = bt_ctf_get_int64(bt_ctf_get_field(event,
	102	scope, "_vtid"));
	103	if (bt_ctf_field_get_error()) {
	104	return -1ULL;
	105	}
	106
	107	return vtid;
	108	}
	109
	110	uint64_t get_context_vpid(const struct bt_ctf_event *event)
	111	{
	112	const struct bt_definition *scope;
	113	uint64_t vpid;
	114
	115	scope = bt_ctf_get_top_level_scope(event, BT_STREAM_EVENT_CONTEXT);
	116	vpid = bt_ctf_get_int64(bt_ctf_get_field(event,
	117	scope, "_vpid"));
	118	if (bt_ctf_field_get_error()) {
	119	return -1ULL;
	120	}
	121
	122	return vpid;
	123	}
	124
	125	uint64_t get_context_vppid(const struct bt_ctf_event *event)
	126	{
	127	const struct bt_definition *scope;
	128	uint64_t vppid;
	129
	130	scope = bt_ctf_get_top_level_scope(event, BT_STREAM_EVENT_CONTEXT);
	131	vppid = bt_ctf_get_int64(bt_ctf_get_field(event,
	132	scope, "_vppid"));
	133	if (bt_ctf_field_get_error()) {
	134	return -1ULL;
	135	}
	136
	137	return vppid;
	138	}
	139
	140	char get_context_comm(const struct bt_ctf_event event)
	141	{
	142	const struct bt_definition *scope;
	143	char *comm;
	144
	145	scope = bt_ctf_get_top_level_scope(event, BT_STREAM_EVENT_CONTEXT);
	146	comm = bt_ctf_get_char_array(bt_ctf_get_field(event,
	147	scope, "_procname"));
	148	if (bt_ctf_field_get_error()) {
	149	fprintf(stderr, "Missing comm context info\n");
	150	return NULL;
	151	}
	152
	153	return comm;
	154	}
	155
	156	char get_context_hostname(const struct bt_ctf_event event)
	157	{
	158	const struct bt_definition *scope;
	159	char *hostname;
	160
	161	scope = bt_ctf_get_top_level_scope(event, BT_STREAM_EVENT_CONTEXT);
	162	hostname = bt_ctf_get_char_array(bt_ctf_get_field(event,
	163	scope, "_hostname"));
	164	if (bt_ctf_field_get_error()) {
	165	return NULL;
	166	}
	167
	168	return hostname;
	169	}
	170
	171	/*
	172	* To get the parent process, put the pid in the tid field
	173	* because the parent process gets pid = tid
	174	*/
	175	struct processtop find_process_tid(struct lttngtop ctx, int tid, const char *comm)
	176	{
	177	struct processtop *tmp;
	178
	179	tmp = g_hash_table_lookup(ctx->process_hash_table,
	180	(gconstpointer) (unsigned long) tid);
	181
	182	return tmp;
	183	}
	184
	185	struct processtop* add_proc(struct lttngtop ctx, int tid, char comm,
	186	unsigned long timestamp, char *hostname)
	187	{
	188	struct processtop *newproc;
	189	struct host *host;
	190
	191	/* if the PID already exists, we just rename the process */
	192	/* FIXME : need to integrate with clone/fork/exit to be accurate */
	193	newproc = find_process_tid(ctx, tid, comm);
	194
	195	if (!newproc) {
	196	newproc = g_new0(struct processtop, 1);
	197	newproc->tid = tid;
	198	newproc->birth = timestamp;
	199	newproc->process_files_table = g_ptr_array_new();
	200	newproc->files_history = NULL;
	201	newproc->totalfileread = 0;
	202	newproc->totalfilewrite = 0;
	203	newproc->fileread = 0;
	204	newproc->filewrite = 0;
	205	newproc->syscall_info = NULL;
	206	newproc->threadparent = NULL;
	207	newproc->threads = g_ptr_array_new();
	208	newproc->perf = g_hash_table_new(g_str_hash, g_str_equal);
	209	g_ptr_array_add(ctx->process_table, newproc);
	210	g_hash_table_insert(ctx->process_hash_table,
	211	(gpointer) (unsigned long) tid, newproc);
	212	if (lookup_tid_list(tid)) {
	213	add_filter_tid_list(newproc);
	214	}
	215	ctx->nbnewthreads++;
	216	ctx->nbthreads++;
	217	}
	218	newproc->comm = strdup(comm);
	219	if (hostname) {
	220	host = lookup_hostname_list(hostname);
	221	if (!host)
	222	host = add_hostname_list(hostname, 0);
	223	if (!newproc->host \|\| (newproc->host != host))
	224	newproc->host = host;
	225	if (is_hostname_filtered(hostname)) {
	226	add_filter_tid_list(newproc);
	227	}
	228	}
	229
	230	return newproc;
	231	}
	232
	233	struct processtop* update_proc(struct processtop* proc, int pid, int tid,
	234	int ppid, int vpid, int vtid, int vppid, char comm, char hostname)
	235	{
	236	struct host *host;
	237
	238	if (proc) {
	239	proc->pid = pid;
	240	proc->tid = tid;
	241	proc->ppid = ppid;
	242	proc->vpid = vpid;
	243	proc->vtid = vtid;
	244	proc->vppid = vppid;
	245	if (strcmp(proc->comm, comm) != 0) {
	246	free(proc->comm);
	247	proc->comm = strdup(comm);
	248	}
	249	if (hostname && !proc->host) {
	250	host = lookup_hostname_list(hostname);
	251	if (!host)
	252	host = add_hostname_list(hostname, 0);
	253	if (!proc->host \|\| (proc->host != host))
	254	proc->host = host;
	255	if (is_hostname_filtered(hostname)) {
	256	add_filter_tid_list(proc);
	257	}
	258	}
	259	}
	260	return proc;
	261	}
	262
	263	/*
	264	* This function just sets the time of death of a process.
	265	* When we rotate the cputime we remove it from the process list.
	266	*/
	267	void death_proc(struct lttngtop ctx, int tid, char comm,
	268	unsigned long timestamp)
	269	{
	270	struct processtop *tmp;
	271	tmp = find_process_tid(ctx, tid, comm);
	272
	273	g_hash_table_remove(ctx->process_hash_table,
	274	(gpointer) (unsigned long) tid);
	275	if (tmp && strcmp(tmp->comm, comm) == 0) {
	276	tmp->death = timestamp;
	277	ctx->nbdeadthreads++;
	278	ctx->nbthreads--;
	279	}
	280	}
	281
	282	struct processtop* get_proc(struct lttngtop ctx, int tid, char comm,
	283	unsigned long timestamp, char *hostname)
	284	{
	285	struct processtop *tmp;
	286
	287	tmp = find_process_tid(ctx, tid, comm);
	288	if (tmp && strcmp(tmp->comm, comm) == 0) {
	289	return tmp;
	290	}
	291	return add_proc(ctx, tid, comm, timestamp, hostname);
	292	}
	293
	294	struct processtop get_proc_pid(struct lttngtop ctx, int tid, int pid,
	295	unsigned long timestamp, char *hostname)
	296	{
	297	struct processtop *tmp;
	298	tmp = find_process_tid(ctx, tid, NULL);
	299	if (tmp && tmp->pid == pid)
	300	return tmp;
	301	return add_proc(ctx, tid, "Unknown", timestamp, hostname);
	302	}
	303
	304	void add_thread(struct processtop parent, struct processtop thread)
	305	{
	306	gint i;
	307	struct processtop *tmp;
	308
	309	if (!parent)
	310	return;
	311
	312	for (i = 0; i < parent->threads->len; i++) {
	313	tmp = g_ptr_array_index(parent->threads, i);
	314	if (tmp == thread)
	315	return;
	316	}
	317	g_ptr_array_add(parent->threads, thread);
	318	}
	319
	320	struct cputime* add_cpu(int cpu)
	321	{
	322	struct cputime *newcpu;
	323
	324	newcpu = g_new0(struct cputime, 1);
	325	newcpu->id = cpu;
	326	newcpu->current_task = NULL;
	327	newcpu->perf = g_hash_table_new(g_str_hash, g_str_equal);
	328
	329	g_ptr_array_add(lttngtop.cpu_table, newcpu);
	330
	331	return newcpu;
	332	}
	333	struct cputime* get_cpu(int cpu)
	334	{
	335	gint i;
	336	struct cputime *tmp;
	337
	338	for (i = 0; i < lttngtop.cpu_table->len; i++) {
	339	tmp = g_ptr_array_index(lttngtop.cpu_table, i);
	340	if (tmp->id == cpu)
	341	return tmp;
	342	}
	343
	344	return add_cpu(cpu);
	345	}
	346
	347	/*
	348	* At the end of a sampling period, we need to display the cpu time for each
	349	* process and to reset it to zero for the next period
	350	*/
	351	void rotate_cputime(unsigned long end)
	352	{
	353	gint i;
	354	struct cputime *tmp;
	355	unsigned long elapsed;
	356
	357	for (i = 0; i < lttngtop.cpu_table->len; i++) {
	358	tmp = g_ptr_array_index(lttngtop.cpu_table, i);
	359	elapsed = end - tmp->task_start;
	360	if (tmp->current_task) {
	361	tmp->current_task->totalcpunsec += elapsed;
	362	tmp->current_task->threadstotalcpunsec += elapsed;
	363	if (tmp->current_task->pid != tmp->current_task->tid &&
	364	tmp->current_task->threadparent) {
	365	tmp->current_task->threadparent->threadstotalcpunsec += elapsed;
	366	}
	367	}
	368	tmp->task_start = end;
	369	}
	370	}
	371
	372	void reset_perf_counter(gpointer key, gpointer value, gpointer user_data)
	373	{
	374	((struct perfcounter*) value)->count = 0;
	375	}
	376
	377	void copy_perf_counter(gpointer key, gpointer value, gpointer new_table)
	378	{
	379	struct perfcounter *newperf;
	380
	381	newperf = g_new0(struct perfcounter, 1);
	382	newperf->count = ((struct perfcounter *) value)->count;
	383	newperf->visible = ((struct perfcounter *) value)->visible;
	384	newperf->sort = ((struct perfcounter *) value)->sort;
	385	g_hash_table_insert((GHashTable *) new_table, strdup(key), newperf);
	386	}
	387
	388	void copy_process_table(gpointer key, gpointer value, gpointer new_table)
	389	{
	390	g_hash_table_insert((GHashTable *) new_table, key, value);
	391	}
	392
	393	void rotate_perfcounter() {
	394	int i;
	395	struct processtop *tmp;
	396
	397	for (i = 0; i < lttngtop.process_table->len; i++) {
	398	tmp = g_ptr_array_index(lttngtop.process_table, i);
	399	g_hash_table_foreach(tmp->perf, reset_perf_counter, NULL);
	400	}
	401	}
	402
	403	void cleanup_processtop()
	404	{
	405	gint i, j;
	406	struct processtop *tmp;
	407	struct files tmpf; / a temporary file */
	408
	409	for (i = 0; i < lttngtop.process_table->len; i++) {
	410	tmp = g_ptr_array_index(lttngtop.process_table, i);
	411	tmp->totalcpunsec = 0;
	412	tmp->threadstotalcpunsec = 0;
	413	tmp->fileread = 0;
	414	tmp->filewrite = 0;
	415
	416	for (j = 0; j < tmp->process_files_table->len; j++) {
	417	tmpf = g_ptr_array_index(tmp->process_files_table, j);
	418	if (tmpf != NULL) {
	419	tmpf->read = 0;
	420	tmpf->write = 0;
	421
	422	if (tmpf->flag == __NR_close)
	423	g_ptr_array_index(
	424	tmp->process_files_table, j
	425	) = NULL;
	426	}
	427	}
	428	}
	429	}
	430
	431	void reset_global_counters()
	432	{
	433	lttngtop.nbnewproc = 0;
	434	lttngtop.nbdeadproc = 0;
	435	lttngtop.nbnewthreads = 0;
	436	lttngtop.nbdeadthreads = 0;
	437	lttngtop.nbnewfiles = 0;
	438	lttngtop.nbclosedfiles = 0;
	439	}
	440
	441	void copy_global_counters(struct lttngtop *dst)
	442	{
	443	dst->nbproc = lttngtop.nbproc;
	444	dst->nbnewproc = lttngtop.nbnewproc;
	445	dst->nbdeadproc = lttngtop.nbdeadproc;
	446	dst->nbthreads = lttngtop.nbthreads;
	447	dst->nbnewthreads = lttngtop.nbnewthreads;
	448	dst->nbdeadthreads = lttngtop.nbdeadthreads;
	449	dst->nbfiles = lttngtop.nbfiles;
	450	dst->nbnewfiles = lttngtop.nbnewfiles;
	451	dst->nbclosedfiles = lttngtop.nbclosedfiles;
	452	reset_global_counters();
	453	}
	454
	455	struct lttngtop* get_copy_lttngtop(unsigned long start, unsigned long end)
	456	{
	457	gint i, j;
	458	unsigned long time;
	459	struct lttngtop *dst;
	460	struct processtop tmp, tmp2, *new;
	461	struct cputime tmpcpu, newcpu;
	462	struct files tmpfile, newfile;
	463	struct kprobes tmpprobe, newprobe;
	464
	465	dst = g_new0(struct lttngtop, 1);
	466	dst->start = start;
	467	dst->end = end;
	468	copy_global_counters(dst);
	469	dst->process_table = g_ptr_array_new();
	470	dst->files_table = g_ptr_array_new();
	471	dst->cpu_table = g_ptr_array_new();
	472	dst->kprobes_table = g_ptr_array_new();
	473	dst->process_hash_table = g_hash_table_new(g_direct_hash, g_direct_equal);
	474	g_hash_table_foreach(lttngtop.process_hash_table, copy_process_table,
	475	dst->process_hash_table);
	476
	477	rotate_cputime(end);
	478
	479	for (i = 0; i < lttngtop.process_table->len; i++) {
	480	tmp = g_ptr_array_index(lttngtop.process_table, i);
	481	new = g_new0(struct processtop, 1);
	482
	483	memcpy(new, tmp, sizeof(struct processtop));
	484	new->threads = g_ptr_array_new();
	485	new->comm = strdup(tmp->comm);
	486	new->process_files_table = g_ptr_array_new();
	487	new->files_history = tmp->files_history;
	488	new->perf = g_hash_table_new(g_str_hash, g_str_equal);
	489	g_hash_table_foreach(tmp->perf, copy_perf_counter, new->perf);
	490
	491	/* compute the stream speed */
	492	if (end - start != 0) {
	493	time = (end - start) / NSEC_PER_SEC;
	494	new->fileread = new->fileread/(time);
	495	new->filewrite = new->filewrite/(time);
	496	}
	497
	498	for (j = 0; j < tmp->process_files_table->len; j++) {
	499	tmpfile = g_ptr_array_index(tmp->process_files_table, j);
	500
	501	newfile = malloc(sizeof(struct files));
	502
	503	if (tmpfile != NULL) {
	504	memcpy(newfile, tmpfile, sizeof(struct files));
	505	newfile->name = strdup(tmpfile->name);
	506	newfile->ref = new;
	507	g_ptr_array_add(new->process_files_table,
	508	newfile);
	509	g_ptr_array_add(dst->files_table, newfile);
	510	} else {
	511	g_ptr_array_add(new->process_files_table, NULL);
	512	g_ptr_array_add(dst->files_table, NULL);
	513	}
	514	/*
	515	* if the process died during the last period, we remove all
	516	* files associated with if after the copy
	517	*/
	518	if (tmp->death > 0 && tmp->death < end) {
	519	/* FIXME : close the files before */
	520	g_ptr_array_remove(tmp->process_files_table, tmpfile);
	521	g_free(tmpfile);
	522	}
	523	}
	524	g_ptr_array_add(dst->process_table, new);
	525
	526	/*
	527	* if the process died during the last period, we remove it from
	528	* the current process list after the copy
	529	*/
	530	if (tmp->death > 0 && tmp->death < end) {
	531	g_ptr_array_remove(lttngtop.process_table, tmp);
	532	/* FIXME : TRUE does not mean clears the object in it */
	533	g_ptr_array_free(tmp->threads, TRUE);
	534	free(tmp->comm);
	535	g_ptr_array_free(tmp->process_files_table, TRUE);
	536	/* FIXME : clear elements */
	537	g_hash_table_destroy(tmp->perf);
	538	g_free(tmp);
	539	}
	540	}
	541	rotate_perfcounter();
	542
	543	for (i = 0; i < lttngtop.cpu_table->len; i++) {
	544	tmpcpu = g_ptr_array_index(lttngtop.cpu_table, i);
	545	newcpu = g_new0(struct cputime, 1);
	546	memcpy(newcpu, tmpcpu, sizeof(struct cputime));
	547	newcpu->perf = g_hash_table_new(g_str_hash, g_str_equal);
	548	g_hash_table_foreach(tmpcpu->perf, copy_perf_counter, newcpu->perf);
	549	/*
	550	* note : we don't care about the current process pointer in the copy
	551	* so the reference is invalid after the memcpy
	552	*/
	553	g_ptr_array_add(dst->cpu_table, newcpu);
	554	}
	555	if (lttngtop.kprobes_table) {
	556	for (i = 0; i < lttngtop.kprobes_table->len; i++) {
	557	tmpprobe = g_ptr_array_index(lttngtop.kprobes_table, i);
	558	newprobe = g_new0(struct kprobes, 1);
	559	memcpy(newprobe, tmpprobe, sizeof(struct kprobes));
	560	tmpprobe->count = 0;
	561	g_ptr_array_add(dst->kprobes_table, newprobe);
	562	}
	563	}
	564	/* FIXME : better algo */
	565	/* create the threads index if required */
	566	for (i = 0; i < dst->process_table->len; i++) {
	567	tmp = g_ptr_array_index(dst->process_table, i);
	568	if (tmp->pid == tmp->tid) {
	569	for (j = 0; j < dst->process_table->len; j++) {
	570	tmp2 = g_ptr_array_index(dst->process_table, j);
	571	if (tmp2->pid == tmp->pid) {
	572	tmp2->threadparent = tmp;
	573	g_ptr_array_add(tmp->threads, tmp2);
	574	}
	575	}
	576	}
	577	}
	578
	579	// update_global_stats(dst);
	580	cleanup_processtop();
	581
	582	return dst;
	583	}
	584
	585
	586	enum bt_cb_ret handle_statedump_process_state(struct bt_ctf_event *call_data,
	587	void *private_data)
	588	{
	589	const struct bt_definition *scope;
	590	struct processtop *proc;
	591	unsigned long timestamp;
	592	int64_t pid, tid, ppid, vtid, vpid, vppid;
	593	char procname, hostname = NULL;
	594
	595	timestamp = bt_ctf_get_timestamp(call_data);
	596	if (timestamp == -1ULL)
	597	goto error;
	598
	599	scope = bt_ctf_get_top_level_scope(call_data,
	600	BT_EVENT_FIELDS);
	601	pid = bt_ctf_get_int64(bt_ctf_get_field(call_data,
	602	scope, "_pid"));
	603	if (bt_ctf_field_get_error()) {
	604	fprintf(stderr, "Missing pid context info\n");
	605	goto error;
	606	}
	607	ppid = bt_ctf_get_int64(bt_ctf_get_field(call_data,
	608	scope, "_ppid"));
	609	if (bt_ctf_field_get_error()) {
	610	goto end;
	611	}
	612	tid = bt_ctf_get_int64(bt_ctf_get_field(call_data,
	613	scope, "_tid"));
	614	if (bt_ctf_field_get_error()) {
	615	fprintf(stderr, "Missing tid context info\n");
	616	goto error;
	617	}
	618	vtid = bt_ctf_get_int64(bt_ctf_get_field(call_data,
	619	scope, "_vtid"));
	620	if (bt_ctf_field_get_error()) {
	621	fprintf(stderr, "Missing vtid context info\n");
	622	goto error;
	623	}
	624	vpid = bt_ctf_get_int64(bt_ctf_get_field(call_data,
	625	scope, "_vpid"));
	626	if (bt_ctf_field_get_error()) {
	627	fprintf(stderr, "Missing vpid context info\n");
	628	goto error;
	629	}
	630	vppid = bt_ctf_get_int64(bt_ctf_get_field(call_data,
	631	scope, "_vppid"));
	632	if (bt_ctf_field_get_error()) {
	633	fprintf(stderr, "Missing vppid context info\n");
	634	goto error;
	635	}
	636
	637	scope = bt_ctf_get_top_level_scope(call_data,
	638	BT_EVENT_FIELDS);
	639	procname = bt_ctf_get_char_array(bt_ctf_get_field(call_data,
	640	scope, "_name"));
	641	if (bt_ctf_field_get_error()) {
	642	fprintf(stderr, "Missing process name context info\n");
	643	goto error;
	644	}
	645
	646	proc = find_process_tid(&lttngtop, tid, procname);
	647	if (proc == NULL)
	648	proc = add_proc(&lttngtop, tid, procname, timestamp, hostname);
	649	update_proc(proc, pid, tid, ppid, vpid, vtid, vppid, procname, hostname);
	650
	651	if (proc) {
	652	free(proc->comm);
	653	proc->comm = strdup(procname);
	654	proc->pid = pid;
	655	}
	656
	657	end:
	658	return BT_CB_OK;
	659
	660	error:
	661	return BT_CB_ERROR_STOP;
	662	}
	663
	664	struct tm format_timestamp(uint64_t timestamp)
	665	{
	666	struct tm tm;
	667	uint64_t ts_sec = 0, ts_nsec;
	668	time_t time_s;
	669
	670	ts_nsec = timestamp;
	671	ts_sec += ts_nsec / NSEC_PER_SEC;
	672	ts_nsec = ts_nsec % NSEC_PER_SEC;
	673
	674	time_s = (time_t) ts_sec;
	675
	676	localtime_r(&time_s, &tm);
	677
	678	return tm;
	679	}
	680
	681	int *lookup_tid_list(int tid)
	682	{
	683	if (!tid_filter_list)
	684	return NULL;
	685
	686	return g_hash_table_lookup(tid_filter_list, (gpointer) &tid);
	687	}
	688
	689	struct host lookup_hostname_list(const char hostname)
	690	{
	691	if (!hostname \|\| !global_host_list)
	692	return NULL;
	693
	694	return g_hash_table_lookup(global_host_list, (gpointer) hostname);
	695	}
	696
	697	int is_hostname_filtered(const char *hostname)
	698	{
	699	struct host *host;
	700
	701	host = lookup_hostname_list(hostname);
	702	if (host)
	703	return host->filter;
	704	return 0;
	705	}
	706
	707	int *lookup_filter_tid_list(int tid)
	708	{
	709	return g_hash_table_lookup(global_filter_list, (gpointer) &tid);
	710	}
	711
	712	void add_filter_tid_list(struct processtop *proc)
	713	{
	714	unsigned long *hash_tid;
	715
	716	hash_tid = malloc(sizeof(unsigned long));
	717	*hash_tid = proc->tid;
	718	g_hash_table_insert(global_filter_list,
	719	(gpointer) (unsigned long) hash_tid, proc);
	720	}
	721
	722	void remove_filter_tid_list(int tid)
	723	{
	724	g_hash_table_remove(global_filter_list,
	725	(gpointer) (unsigned long) &tid);
	726	}
	727
	728	struct host add_hostname_list(char hostname, int filter)
	729	{
	730	struct host *host;
	731
	732	host = lookup_hostname_list(hostname);
	733	if (host)
	734	return host;
	735
	736	host = g_new0(struct host, 1);
	737	host->hostname = strdup(hostname);
	738	host->filter = filter;
	739	g_hash_table_insert(global_host_list,
	740	(gpointer) host->hostname,
	741	(gpointer) host);
	742
	743	return host;
	744	}
	745
	746	void update_hostname_filter(struct host *host)
	747	{
	748	struct processtop *tmp;
	749	int i;
	750
	751	for (i = 0; i < lttngtop.process_table->len; i++) {
	752	tmp = g_ptr_array_index(lttngtop.process_table, i);
	753	if (tmp->host == host) {
	754	if (host->filter)
	755	add_filter_tid_list(tmp);
	756	else
	757	remove_filter_tid_list(tmp->tid);
	758	}
	759	}
	760	}