netdata/collectors/ebpf.plugin/ebpf_process.c

// SPDX-License-Identifier: GPL-3.0-or-later

#include <sys/resource.h>

#include "ebpf.h"
#include "ebpf_process.h"

/*****************************************************************
 *
 *  GLOBAL VARIABLES
 *
 *****************************************************************/

static char *process_dimension_names[NETDATA_KEY_PUBLISH_PROCESS_END] = { "process", "task",  "process", "thread" };
static char *process_id_names[NETDATA_KEY_PUBLISH_PROCESS_END] = { "do_exit", "release_task", "_do_fork", "sys_clone" };
static char *status[] = { "process", "zombie" };

static ebpf_local_maps_t process_maps[] = {{.name = "tbl_pid_stats", .internal_input = ND_EBPF_DEFAULT_PID_SIZE,
                                            .user_input = 0,
                                            .type = NETDATA_EBPF_MAP_RESIZABLE  | NETDATA_EBPF_MAP_PID,
                                            .map_fd = ND_EBPF_MAP_FD_NOT_INITIALIZED,
#ifdef LIBBPF_MAJOR_VERSION
                                            .map_type = BPF_MAP_TYPE_PERCPU_HASH
#endif
                                           },
                                           {.name = "tbl_total_stats", .internal_input = NETDATA_KEY_END_VECTOR,
                                            .user_input = 0, .type = NETDATA_EBPF_MAP_STATIC,
                                            .map_fd = ND_EBPF_MAP_FD_NOT_INITIALIZED,
#ifdef LIBBPF_MAJOR_VERSION
                                            .map_type = BPF_MAP_TYPE_PERCPU_ARRAY
#endif
                                           },
                                           {.name = "process_ctrl", .internal_input = NETDATA_CONTROLLER_END,
                                            .user_input = 0,
                                            .type = NETDATA_EBPF_MAP_CONTROLLER,
                                            .map_fd = ND_EBPF_MAP_FD_NOT_INITIALIZED,
#ifdef LIBBPF_MAJOR_VERSION
                                            .map_type = BPF_MAP_TYPE_PERCPU_ARRAY
#endif
                                           },
                                           {.name = NULL, .internal_input = 0, .user_input = 0,
                                            .type = NETDATA_EBPF_MAP_CONTROLLER,
                                            .map_fd = ND_EBPF_MAP_FD_NOT_INITIALIZED,
#ifdef LIBBPF_MAJOR_VERSION
                                            .map_type = BPF_MAP_TYPE_PERCPU_ARRAY
#endif
                                            }};

char *tracepoint_sched_type = { "sched" } ;
char *tracepoint_sched_process_exit = { "sched_process_exit" };
char *tracepoint_sched_process_exec = { "sched_process_exec" };
char *tracepoint_sched_process_fork = { "sched_process_fork" };
static int was_sched_process_exit_enabled = 0;
static int was_sched_process_exec_enabled = 0;
static int was_sched_process_fork_enabled = 0;

static netdata_idx_t *process_hash_values = NULL;
ebpf_process_stat_t *process_stat_vector = NULL;
static netdata_syscall_stat_t process_aggregated_data[NETDATA_KEY_PUBLISH_PROCESS_END];
static netdata_publish_syscall_t process_publish_aggregated[NETDATA_KEY_PUBLISH_PROCESS_END];

struct config process_config = { .first_section = NULL,
    .last_section = NULL,
    .mutex = NETDATA_MUTEX_INITIALIZER,
    .index = { .avl_tree = { .root = NULL, .compar = appconfig_section_compare },
        .rwlock = AVL_LOCK_INITIALIZER } };

#ifdef NETDATA_DEV_MODE
int process_disable_priority;
#endif

/*****************************************************************
 *
 *  PROCESS DATA AND SEND TO NETDATA
 *
 *****************************************************************/

/**
 * Update publish structure before to send data to Netdata.
 *
 * @param publish  the first output structure with independent dimensions
 * @param pvc      the second output structure with correlated dimensions
 * @param input    the structure with the input data.
 */
static void ebpf_update_global_publish(netdata_publish_syscall_t *publish, netdata_publish_vfs_common_t *pvc,
                                       netdata_syscall_stat_t *input)
{
    netdata_publish_syscall_t *move = publish;
    int selector = NETDATA_KEY_PUBLISH_PROCESS_EXIT;
    while (move) {
        move->ncall = (input->call > move->pcall) ? input->call - move->pcall : move->pcall - input->call;
        move->nbyte = (input->bytes > move->pbyte) ? input->bytes - move->pbyte : move->pbyte - input->bytes;
        move->nerr = (input->ecall > move->nerr) ? input->ecall - move->perr : move->perr - input->ecall;

        move->pcall = input->call;
        move->pbyte = input->bytes;
        move->perr = input->ecall;

        input = input->next;
        move = move->next;
        selector++;
    }

    pvc->running = (long)publish[NETDATA_KEY_PUBLISH_PROCESS_FORK].ncall -
                   (long)publish[NETDATA_KEY_PUBLISH_PROCESS_CLONE].ncall;
    publish[NETDATA_KEY_PUBLISH_PROCESS_RELEASE_TASK].ncall = -publish[NETDATA_KEY_PUBLISH_PROCESS_RELEASE_TASK].ncall;
    pvc->zombie = (long)publish[NETDATA_KEY_PUBLISH_PROCESS_EXIT].ncall +
                  (long)publish[NETDATA_KEY_PUBLISH_PROCESS_RELEASE_TASK].ncall;
}

/**
 * Call the necessary functions to create a chart.
 *
 * @param family  the chart family
 * @param move    the pointer with the values that will be published
 */
static void write_status_chart(char *family, netdata_publish_vfs_common_t *pvc)
{
    ebpf_write_begin_chart(family, NETDATA_PROCESS_STATUS_NAME, "");

    write_chart_dimension(status[0], (long long)pvc->running);
    write_chart_dimension(status[1], (long long)pvc->zombie);

    ebpf_write_end_chart();
}

/**
 * Send data to Netdata calling auxiliary functions.
 *
 * @param em the structure with thread information
 */
static void ebpf_process_send_data(ebpf_module_t *em)
{
    netdata_publish_vfs_common_t pvc;
    ebpf_update_global_publish(process_publish_aggregated, &pvc, process_aggregated_data);

    write_count_chart(NETDATA_EXIT_SYSCALL, NETDATA_EBPF_SYSTEM_GROUP,
                      &process_publish_aggregated[NETDATA_KEY_PUBLISH_PROCESS_EXIT], 2);
    write_count_chart(NETDATA_PROCESS_SYSCALL, NETDATA_EBPF_SYSTEM_GROUP,
                      &process_publish_aggregated[NETDATA_KEY_PUBLISH_PROCESS_FORK], 2);

    write_status_chart(NETDATA_EBPF_SYSTEM_GROUP, &pvc);
    if (em->mode < MODE_ENTRY) {
        write_err_chart(NETDATA_PROCESS_ERROR_NAME, NETDATA_EBPF_SYSTEM_GROUP,
                        &process_publish_aggregated[NETDATA_KEY_PUBLISH_PROCESS_FORK], 2);
    }
}

/**
 * Sum values for pid
 *
 * @param root the structure with all available PIDs
 * @param offset the address that we are reading
 *
 * @return it returns the sum of all PIDs
 */
long long ebpf_process_sum_values_for_pids(struct ebpf_pid_on_target *root, size_t offset)
{
    long long ret = 0;
    while (root) {
        int32_t pid = root->pid;
        ebpf_process_stat_t *w = global_process_stats[pid];
        if (w) {
            uint32_t *value = (uint32_t *)((char *)w + offset);
            ret += *value;
        }

        root = root->next;
    }

    return ret;
}

/**
 * Remove process pid
 *
 * Remove from PID task table when task_release was called.
 */
void ebpf_process_remove_pids()
{
    struct ebpf_pid_stat *pids = ebpf_root_of_pids;
    int pid_fd = process_maps[NETDATA_PROCESS_PID_TABLE].map_fd;
    while (pids) {
        uint32_t pid = pids->pid;
        ebpf_process_stat_t *w = global_process_stats[pid];
        if (w) {
            ebpf_process_stat_release(w);
            global_process_stats[pid] = NULL;
            bpf_map_delete_elem(pid_fd, &pid);
        }

        pids = pids->next;
    }
}

/**
 * Send data to Netdata calling auxiliary functions.
 *
 * @param root the target list.
 */
void ebpf_process_send_apps_data(struct ebpf_target *root, ebpf_module_t *em)
{
    struct ebpf_target *w;
    // This algorithm is improved in https://github.com/netdata/netdata/pull/16030
    collected_number values[5];

    for (w = root; w; w = w->next) {
        if (unlikely(!(w->charts_created & (1<<EBPF_MODULE_PROCESS_IDX))))
            continue;

        values[0] = ebpf_process_sum_values_for_pids(w->root_pid, offsetof(ebpf_process_stat_t, create_process));
        values[1] = ebpf_process_sum_values_for_pids(w->root_pid, offsetof(ebpf_process_stat_t, create_thread));
        values[2] = ebpf_process_sum_values_for_pids(w->root_pid, offsetof(ebpf_process_stat_t,
                                                                           exit_call));
        values[3] = ebpf_process_sum_values_for_pids(w->root_pid, offsetof(ebpf_process_stat_t,
                                                                           release_call));
        values[4] = ebpf_process_sum_values_for_pids(w->root_pid, offsetof(ebpf_process_stat_t,
                                                                           task_err));

        ebpf_write_begin_chart(NETDATA_APP_FAMILY, w->clean_name, "_ebpf_process_start");
        write_chart_dimension("calls", values[0]);
        ebpf_write_end_chart();

        ebpf_write_begin_chart(NETDATA_APP_FAMILY, w->clean_name, "_ebpf_thread_start");
        write_chart_dimension("calls", values[1]);
        ebpf_write_end_chart();

        ebpf_write_begin_chart(NETDATA_APP_FAMILY, w->clean_name, "_ebpf_task_exit");
        write_chart_dimension("calls", values[2]);
        ebpf_write_end_chart();

        ebpf_write_begin_chart(NETDATA_APP_FAMILY, w->clean_name, "_ebpf_task_released");
        write_chart_dimension("calls", values[3]);
        ebpf_write_end_chart();

        if (em->mode < MODE_ENTRY) {
            ebpf_write_begin_chart(NETDATA_APP_FAMILY, w->clean_name, "_ebpf_task_error");
            write_chart_dimension("calls", values[4]);
            ebpf_write_end_chart();
        }
    }

    ebpf_process_remove_pids();
}

/*****************************************************************
 *
 *  READ INFORMATION FROM KERNEL RING
 *
 *****************************************************************/

/**
 * Read the hash table and store data to allocated vectors.
 *
 * @param maps_per_core do I need to read all cores?
 */
static void ebpf_read_process_hash_global_tables(netdata_idx_t *stats, int maps_per_core)
{
    netdata_idx_t res[NETDATA_KEY_END_VECTOR];
    ebpf_read_global_table_stats(res,
                                 process_hash_values,
                                 process_maps[NETDATA_PROCESS_GLOBAL_TABLE].map_fd,
                                 maps_per_core,
                                 0,
                                 NETDATA_KEY_END_VECTOR);

    ebpf_read_global_table_stats(stats,
                                 process_hash_values,
                                 process_maps[NETDATA_PROCESS_CTRL_TABLE].map_fd,
                                 maps_per_core,
                                 NETDATA_CONTROLLER_PID_TABLE_ADD,
                                 NETDATA_CONTROLLER_END);

    process_aggregated_data[NETDATA_KEY_PUBLISH_PROCESS_EXIT].call = res[NETDATA_KEY_CALLS_DO_EXIT];
    process_aggregated_data[NETDATA_KEY_PUBLISH_PROCESS_RELEASE_TASK].call = res[NETDATA_KEY_CALLS_RELEASE_TASK];
    process_aggregated_data[NETDATA_KEY_PUBLISH_PROCESS_FORK].call = res[NETDATA_KEY_CALLS_DO_FORK];
    process_aggregated_data[NETDATA_KEY_PUBLISH_PROCESS_CLONE].call = res[NETDATA_KEY_CALLS_SYS_CLONE];

    process_aggregated_data[NETDATA_KEY_PUBLISH_PROCESS_FORK].ecall = res[NETDATA_KEY_ERROR_DO_FORK];
    process_aggregated_data[NETDATA_KEY_PUBLISH_PROCESS_CLONE].ecall = res[NETDATA_KEY_ERROR_SYS_CLONE];
}

/**
 * Update cgroup
 *
 * Update cgroup data based in PID running.
 *
 * @param maps_per_core do I need to read all cores?
 */
static void ebpf_update_process_cgroup(int maps_per_core)
{
    ebpf_cgroup_target_t *ect ;
    int pid_fd = process_maps[NETDATA_PROCESS_PID_TABLE].map_fd;

    size_t length =  sizeof(ebpf_process_stat_t);
    if (maps_per_core)
        length *= ebpf_nprocs;
    pthread_mutex_lock(&mutex_cgroup_shm);
    for (ect = ebpf_cgroup_pids; ect; ect = ect->next) {
        struct pid_on_target2 *pids;
        for (pids = ect->pids; pids; pids = pids->next) {
            int pid = pids->pid;
            ebpf_process_stat_t *out = &pids->ps;
            if (global_process_stats[pid]) {
                ebpf_process_stat_t *in = global_process_stats[pid];

                memcpy(out, in, sizeof(ebpf_process_stat_t));
            } else {
                if (bpf_map_lookup_elem(pid_fd, &pid, process_stat_vector)) {
                    memset(out, 0, sizeof(ebpf_process_stat_t));
                }

                ebpf_process_apps_accumulator(process_stat_vector, maps_per_core);

                memcpy(out, process_stat_vector, sizeof(ebpf_process_stat_t));

                memset(process_stat_vector, 0, length);
            }
        }
    }
    pthread_mutex_unlock(&mutex_cgroup_shm);
}

/*****************************************************************
 *
 *  FUNCTIONS TO CREATE CHARTS
 *
 *****************************************************************/

/**
 * Create process status chart
 *
 * @param family the chart family
 * @param name   the chart name
 * @param axis   the axis label
 * @param web    the group name used to attach the chart on dashboard
 * @param order  the order number of the specified chart
 * @param update_every value to overwrite the update frequency set by the server.
 */
static void ebpf_process_status_chart(char *family, char *name, char *axis,
                                      char *web, char *algorithm, int order, int update_every)
{
    printf("CHART %s.%s '' 'Process not closed' '%s' '%s' '' line %d %d '' 'ebpf.plugin' 'process'\n",
           family,
           name,
           axis,
           web,
           order,
           update_every);

    printf("DIMENSION %s '' %s 1 1\n", status[0], algorithm);
    printf("DIMENSION %s '' %s 1 1\n", status[1], algorithm);
}

/**
 * Create global charts
 *
 * Call ebpf_create_chart to create the charts for the collector.
 *
 * @param em a pointer to the structure with the default values.
 */
static void ebpf_create_global_charts(ebpf_module_t *em)
{
    ebpf_create_chart(NETDATA_EBPF_SYSTEM_GROUP,
                      NETDATA_PROCESS_SYSCALL,
                      "Start process",
                      EBPF_COMMON_DIMENSION_CALL,
                      NETDATA_PROCESS_GROUP,
                      NULL,
                      NETDATA_EBPF_CHART_TYPE_LINE,
                      21002,
                      ebpf_create_global_dimension,
                      &process_publish_aggregated[NETDATA_KEY_PUBLISH_PROCESS_FORK],
                      2, em->update_every, NETDATA_EBPF_MODULE_NAME_PROCESS);

    ebpf_create_chart(NETDATA_EBPF_SYSTEM_GROUP,
                      NETDATA_EXIT_SYSCALL,
                      "Exit process",
                      EBPF_COMMON_DIMENSION_CALL,
                      NETDATA_PROCESS_GROUP,
                      NULL,
                      NETDATA_EBPF_CHART_TYPE_LINE,
                      21003,
                      ebpf_create_global_dimension,
                      &process_publish_aggregated[NETDATA_KEY_PUBLISH_PROCESS_EXIT],
                      2, em->update_every, NETDATA_EBPF_MODULE_NAME_PROCESS);

    ebpf_process_status_chart(NETDATA_EBPF_SYSTEM_GROUP,
                              NETDATA_PROCESS_STATUS_NAME,
                              EBPF_COMMON_DIMENSION_DIFFERENCE,
                              NETDATA_PROCESS_GROUP,
                              ebpf_algorithms[NETDATA_EBPF_ABSOLUTE_IDX],
                              21004, em->update_every);

    if (em->mode < MODE_ENTRY) {
        ebpf_create_chart(NETDATA_EBPF_SYSTEM_GROUP,
                          NETDATA_PROCESS_ERROR_NAME,
                          "Fails to create process",
                          EBPF_COMMON_DIMENSION_CALL,
                          NETDATA_PROCESS_GROUP,
                          NULL,
                          NETDATA_EBPF_CHART_TYPE_LINE,
                          21005,
                          ebpf_create_global_dimension,
                          &process_publish_aggregated[NETDATA_KEY_PUBLISH_PROCESS_FORK],
                          2, em->update_every, NETDATA_EBPF_MODULE_NAME_PROCESS);
    }

    fflush(stdout);
}

/**
 * Create process apps charts
 *
 * Call ebpf_create_chart to create the charts on apps submenu.
 *
 * @param em   a pointer to the structure with the default values.
 * @param ptr  a pointer for the targets.
 */
void ebpf_process_create_apps_charts(struct ebpf_module *em, void *ptr)
{
    struct ebpf_target *root = ptr;
    struct ebpf_target *w;
    int update_every = em->update_every;
    for (w = root; w; w = w->next) {
        if (unlikely(!w->exposed))
            continue;

        ebpf_write_chart_cmd(NETDATA_APP_FAMILY,
                             w->clean_name,
                             "_ebpf_process_start",
                             "Process started.",
                             EBPF_COMMON_DIMENSION_CALL,
                             NETDATA_PROCESS_GROUP,
                             NETDATA_EBPF_CHART_TYPE_STACKED,
                             "app.ebpf_process_start",
                             20161,
                             update_every,
                             NETDATA_EBPF_MODULE_NAME_PROCESS);
        ebpf_create_chart_labels("app_group", w->name, 1);
        ebpf_commit_label();
        fprintf(stdout, "DIMENSION calls '' %s 1 1\n", ebpf_algorithms[NETDATA_EBPF_ABSOLUTE_IDX]);

        ebpf_write_chart_cmd(NETDATA_APP_FAMILY,
                             w->clean_name,
                             "_ebpf_thread_start",
                             "Threads started.",
                             EBPF_COMMON_DIMENSION_CALL,
                             NETDATA_PROCESS_GROUP,
                             NETDATA_EBPF_CHART_TYPE_STACKED,
                             "app.ebpf_thread_start",
                             20162,
                             update_every,
                             NETDATA_EBPF_MODULE_NAME_PROCESS);
        ebpf_create_chart_labels("app_group", w->name, 1);
        ebpf_commit_label();
        fprintf(stdout, "DIMENSION calls '' %s 1 1\n", ebpf_algorithms[NETDATA_EBPF_ABSOLUTE_IDX]);

        ebpf_write_chart_cmd(NETDATA_APP_FAMILY,
                             w->clean_name,
                             "_ebpf_task_exit",
                             "Tasks starts exit process.",
                             EBPF_COMMON_DIMENSION_CALL,
                             NETDATA_PROCESS_GROUP,
                             NETDATA_EBPF_CHART_TYPE_STACKED,
                             "app.ebpf_task_exit",
                             20163,
                             update_every,
                             NETDATA_EBPF_MODULE_NAME_PROCESS);
        ebpf_create_chart_labels("app_group", w->name, 1);
        ebpf_commit_label();
        fprintf(stdout, "DIMENSION calls '' %s 1 1\n", ebpf_algorithms[NETDATA_EBPF_ABSOLUTE_IDX]);

        ebpf_write_chart_cmd(NETDATA_APP_FAMILY,
                             w->clean_name,
                             "_ebpf_task_released",
                             "Tasks released.",
                             EBPF_COMMON_DIMENSION_CALL,
                             NETDATA_PROCESS_GROUP,
                             NETDATA_EBPF_CHART_TYPE_STACKED,
                             "app.ebpf_task_released",
                             20164,
                             update_every,
                             NETDATA_EBPF_MODULE_NAME_PROCESS);
        ebpf_create_chart_labels("app_group", w->name, 1);
        ebpf_commit_label();
        fprintf(stdout, "DIMENSION calls '' %s 1 1\n", ebpf_algorithms[NETDATA_EBPF_ABSOLUTE_IDX]);

        if (em->mode < MODE_ENTRY) {
            ebpf_write_chart_cmd(NETDATA_APP_FAMILY,
                                 w->clean_name,
                                 "_ebpf_task_error",
                                 "Errors to create process or threads.",
                                 EBPF_COMMON_DIMENSION_CALL,
                                 NETDATA_PROCESS_GROUP,
                                 NETDATA_EBPF_CHART_TYPE_STACKED,
                                 "app.ebpf_task_error",
                                 20165,
                                 update_every,
                                 NETDATA_EBPF_MODULE_NAME_PROCESS);
            ebpf_create_chart_labels("app_group", w->name, 1);
            ebpf_commit_label();
            fprintf(stdout, "DIMENSION calls '' %s 1 1\n", ebpf_algorithms[NETDATA_EBPF_ABSOLUTE_IDX]);
        }
        w->charts_created |= 1<<EBPF_MODULE_PROCESS_IDX;
    }

    em->apps_charts |= NETDATA_EBPF_APPS_FLAG_CHART_CREATED;
}

/*****************************************************************
 *
 *  FUNCTIONS TO CLOSE THE THREAD
 *
 *****************************************************************/

static void ebpf_obsolete_specific_process_charts(char *type, ebpf_module_t *em);

/**
 * Obsolete services
 *
 * Obsolete all service charts created
 *
 * @param em a pointer to `struct ebpf_module`
 */
static void ebpf_obsolete_process_services(ebpf_module_t *em)
{
    ebpf_write_chart_obsolete(NETDATA_SERVICE_FAMILY,
                              NETDATA_SYSCALL_APPS_TASK_PROCESS,
                              "",
                              "Process started",
                              EBPF_COMMON_DIMENSION_CALL,
                              NETDATA_APPS_PROCESS_GROUP,
                              NETDATA_EBPF_CHART_TYPE_STACKED,
                              NULL,
                              20065,
                              em->update_every);

    ebpf_write_chart_obsolete(NETDATA_SERVICE_FAMILY,
                              NETDATA_SYSCALL_APPS_TASK_THREAD,
                              "",
                              "Threads started",
                              EBPF_COMMON_DIMENSION_CALL,
                              NETDATA_APPS_PROCESS_GROUP,
                              NETDATA_EBPF_CHART_TYPE_STACKED,
                              NULL,
                              20066,
                              em->update_every);

    ebpf_write_chart_obsolete(NETDATA_SERVICE_FAMILY,
                              NETDATA_SYSCALL_APPS_TASK_CLOSE,
                              "",
                              "Tasks starts exit process.",
                              EBPF_COMMON_DIMENSION_CALL,
                              NETDATA_APPS_PROCESS_GROUP,
                              NETDATA_EBPF_CHART_TYPE_STACKED,
                              NULL,
                              20067,
                              em->update_every);

    ebpf_write_chart_obsolete(NETDATA_SERVICE_FAMILY,
                              NETDATA_SYSCALL_APPS_TASK_EXIT,
                              "",
                              "Tasks closed",
                              EBPF_COMMON_DIMENSION_CALL,
                              NETDATA_APPS_PROCESS_GROUP,
                              NETDATA_EBPF_CHART_TYPE_STACKED,
                              NULL,
                              20068,
                              em->update_every);

    if (em->mode < MODE_ENTRY) {
        ebpf_write_chart_obsolete(NETDATA_SERVICE_FAMILY,
                                  NETDATA_SYSCALL_APPS_TASK_ERROR,
                                  "",
                                  "Errors to create process or threads.",
                                  EBPF_COMMON_DIMENSION_CALL,
                                  NETDATA_APPS_PROCESS_GROUP,
                                  NETDATA_EBPF_CHART_TYPE_STACKED,
                                  NULL,
                                  20069,
                                  em->update_every);
    }
}

/**
 * Obsolete cgroup chart
 *
 * Send obsolete for all charts created before to close.
 *
 * @param em a pointer to `struct ebpf_module`
 */
static inline void ebpf_obsolete_process_cgroup_charts(ebpf_module_t *em) {
    pthread_mutex_lock(&mutex_cgroup_shm);

    ebpf_obsolete_process_services(em);

    ebpf_cgroup_target_t *ect;
    for (ect = ebpf_cgroup_pids; ect ; ect = ect->next) {
        if (ect->systemd)
            continue;

        ebpf_obsolete_specific_process_charts(ect->name, em);
    }
    pthread_mutex_unlock(&mutex_cgroup_shm);
}

/**
 * Obsolette apps charts
 *
 * Obsolete apps charts.
 *
 * @param em a pointer to the structure with the default values.
 */
void ebpf_obsolete_process_apps_charts(struct ebpf_module *em)
{
    struct ebpf_target *w;
    int update_every = em->update_every;
    for (w = apps_groups_root_target; w; w = w->next) {
        if (unlikely(!(w->charts_created & (1<<EBPF_MODULE_PROCESS_IDX))))
            continue;

        ebpf_write_chart_obsolete(NETDATA_APP_FAMILY,
                                  w->clean_name,
                                  "_ebpf_process_start",
                                  "Process started.",
                                  EBPF_COMMON_DIMENSION_CALL,
                                  NETDATA_PROCESS_GROUP,
                                  NETDATA_EBPF_CHART_TYPE_STACKED,
                                  "app.ebpf_process_start",
                                  20161,
                                  update_every);

        ebpf_write_chart_obsolete(NETDATA_APP_FAMILY,
                                  w->clean_name,
                                  "_ebpf_thread_start",
                                  "Threads started.",
                                  EBPF_COMMON_DIMENSION_CALL,
                                  NETDATA_PROCESS_GROUP,
                                  NETDATA_EBPF_CHART_TYPE_STACKED,
                                  "app.ebpf_thread_start",
                                  20162,
                                  update_every);

        ebpf_write_chart_obsolete(NETDATA_APP_FAMILY,
                                  w->clean_name,
                                  "_ebpf_task_exit",
                                  "Tasks starts exit process.",
                                  EBPF_COMMON_DIMENSION_CALL,
                                  NETDATA_PROCESS_GROUP,
                                  NETDATA_EBPF_CHART_TYPE_STACKED,
                                  "app.ebpf_task_exit",
                                  20163,
                                  update_every);

        ebpf_write_chart_obsolete(NETDATA_APP_FAMILY,
                                  w->clean_name,
                                  "_ebpf_task_released",
                                  "Tasks released.",
                                  EBPF_COMMON_DIMENSION_CALL,
                                  NETDATA_PROCESS_GROUP,
                                  NETDATA_EBPF_CHART_TYPE_STACKED,
                                  "app.ebpf_task_released",
                                  20164,
                                  update_every);

        if (em->mode < MODE_ENTRY) {
            ebpf_write_chart_obsolete(NETDATA_APP_FAMILY,
                                      w->clean_name,
                                      "_ebpf_task_error",
                                      "Errors to create process or threads.",
                                      EBPF_COMMON_DIMENSION_CALL,
                                      NETDATA_PROCESS_GROUP,
                                      NETDATA_EBPF_CHART_TYPE_STACKED,
                                      "app.ebpf_task_error",
                                      20165,
                                      update_every);
        }

        w->charts_created &= ~(1<<EBPF_MODULE_PROCESS_IDX);
    }
}

/**
 * Obsolete global
 *
 * Obsolete global charts created by thread.
 *
 * @param em a pointer to `struct ebpf_module`
 */
static void ebpf_obsolete_process_global(ebpf_module_t *em)
{
    ebpf_write_chart_obsolete(NETDATA_EBPF_SYSTEM_GROUP,
                              NETDATA_PROCESS_SYSCALL,
                              "",
                              "Start process",
                              EBPF_COMMON_DIMENSION_CALL,
                              NETDATA_PROCESS_GROUP,
                              NETDATA_EBPF_CHART_TYPE_LINE,
                              NULL,
                              21002,
                              em->update_every);

    ebpf_write_chart_obsolete(NETDATA_EBPF_SYSTEM_GROUP,
                              NETDATA_EXIT_SYSCALL,
                              "",
                              "Exit process",
                              EBPF_COMMON_DIMENSION_CALL,
                              NETDATA_PROCESS_GROUP,
                              NETDATA_EBPF_CHART_TYPE_LINE,
                              NULL,
                              21003,
                              em->update_every);

    ebpf_write_chart_obsolete(NETDATA_EBPF_SYSTEM_GROUP,
                              NETDATA_PROCESS_STATUS_NAME,
                              "",
                              "Process not closed",
                              EBPF_COMMON_DIMENSION_DIFFERENCE,
                              NETDATA_PROCESS_GROUP,
                              NETDATA_EBPF_CHART_TYPE_LINE,
                              NULL,
                              21004,
                              em->update_every);

    if (em->mode < MODE_ENTRY) {
        ebpf_write_chart_obsolete(NETDATA_EBPF_SYSTEM_GROUP,
                                  NETDATA_PROCESS_ERROR_NAME,
                                  "",
                                  "Fails to create process",
                                  EBPF_COMMON_DIMENSION_CALL,
                                  NETDATA_PROCESS_GROUP,
                                  NETDATA_EBPF_CHART_TYPE_LINE,
                                  NULL,
                                  21005,
                                  em->update_every);
    }
}

/**
 * Process disable tracepoints
 *
 * Disable tracepoints when the plugin was responsible to enable it.
 */
static void ebpf_process_disable_tracepoints()
{
    char *default_message = { "Cannot disable the tracepoint" };
    if (!was_sched_process_exit_enabled) {
        if (ebpf_disable_tracing_values(tracepoint_sched_type, tracepoint_sched_process_exit))
            netdata_log_error("%s %s/%s.", default_message, tracepoint_sched_type, tracepoint_sched_process_exit);
    }

    if (!was_sched_process_exec_enabled) {
        if (ebpf_disable_tracing_values(tracepoint_sched_type, tracepoint_sched_process_exec))
            netdata_log_error("%s %s/%s.", default_message, tracepoint_sched_type, tracepoint_sched_process_exec);
    }

    if (!was_sched_process_fork_enabled) {
        if (ebpf_disable_tracing_values(tracepoint_sched_type, tracepoint_sched_process_fork))
            netdata_log_error("%s %s/%s.", default_message, tracepoint_sched_type, tracepoint_sched_process_fork);
    }
}

/**
 * Process Exit
 *
 * Cancel child thread.
 *
 * @param ptr thread data.
 */
static void ebpf_process_exit(void *ptr)
{
    ebpf_module_t *em = (ebpf_module_t *)ptr;

    if (em->enabled == NETDATA_THREAD_EBPF_FUNCTION_RUNNING) {
        pthread_mutex_lock(&lock);
        if (em->cgroup_charts) {
            ebpf_obsolete_process_cgroup_charts(em);
            fflush(stdout);
        }

        if (em->apps_charts & NETDATA_EBPF_APPS_FLAG_CHART_CREATED) {
            ebpf_obsolete_process_apps_charts(em);
        }

        ebpf_obsolete_process_global(em);

#ifdef NETDATA_DEV_MODE
    if (ebpf_aral_process_stat)
        ebpf_statistic_obsolete_aral_chart(em, process_disable_priority);
#endif

        fflush(stdout);
        pthread_mutex_unlock(&lock);
    }

    ebpf_update_kernel_memory_with_vector(&plugin_statistics, em->maps, EBPF_ACTION_STAT_REMOVE);

    if (em->objects) {
        ebpf_unload_legacy_code(em->objects, em->probe_links);
        em->objects = NULL;
        em->probe_links = NULL;
    }

    freez(process_hash_values);
    freez(process_stat_vector);

    ebpf_process_disable_tracepoints();

    pthread_mutex_lock(&ebpf_exit_cleanup);
    process_pid_fd = -1;
    em->enabled = NETDATA_THREAD_EBPF_STOPPED;
    ebpf_update_stats(&plugin_statistics, em);
    pthread_mutex_unlock(&ebpf_exit_cleanup);
}

/*****************************************************************
 *
 *  FUNCTIONS WITH THE MAIN LOOP
 *
 *****************************************************************/


/**
 * Sum PIDs
 *
 * Sum values for all targets.
 *
 * @param ps  structure used to store data
 * @param pids input data
 */
static void ebpf_process_sum_cgroup_pids(ebpf_process_stat_t *ps, struct pid_on_target2 *pids)
{
    ebpf_process_stat_t accumulator;
    memset(&accumulator, 0, sizeof(accumulator));

    while (pids) {
        ebpf_process_stat_t *pps = &pids->ps;

        accumulator.exit_call += pps->exit_call;
        accumulator.release_call += pps->release_call;
        accumulator.create_process += pps->create_process;
        accumulator.create_thread += pps->create_thread;

        accumulator.task_err += pps->task_err;

        pids = pids->next;
    }

    ps->exit_call = (accumulator.exit_call >= ps->exit_call) ? accumulator.exit_call : ps->exit_call;
    ps->release_call = (accumulator.release_call >= ps->release_call) ? accumulator.release_call : ps->release_call;
    ps->create_process = (accumulator.create_process >= ps->create_process) ? accumulator.create_process : ps->create_process;
    ps->create_thread = (accumulator.create_thread >= ps->create_thread) ? accumulator.create_thread : ps->create_thread;

    ps->task_err = (accumulator.task_err >= ps->task_err) ? accumulator.task_err : ps->task_err;
}

/*
 * Send Specific Process data
 *
 * Send data for specific cgroup/apps.
 *
 * @param type   chart type
 * @param values structure with values that will be sent to netdata
 * @param em   the structure with thread information
 */
static void ebpf_send_specific_process_data(char *type, ebpf_process_stat_t *values, ebpf_module_t *em)
{
    ebpf_write_begin_chart(type, NETDATA_SYSCALL_APPS_TASK_PROCESS, "");
    write_chart_dimension(process_publish_aggregated[NETDATA_KEY_PUBLISH_PROCESS_FORK].name,
                          (long long) values->create_process);
    ebpf_write_end_chart();

    ebpf_write_begin_chart(type, NETDATA_SYSCALL_APPS_TASK_THREAD, "");
    write_chart_dimension(process_publish_aggregated[NETDATA_KEY_PUBLISH_PROCESS_CLONE].name,
                          (long long) values->create_thread);
    ebpf_write_end_chart();

    ebpf_write_begin_chart(type, NETDATA_SYSCALL_APPS_TASK_EXIT, "");
    write_chart_dimension(process_publish_aggregated[NETDATA_KEY_PUBLISH_PROCESS_EXIT].name,
                          (long long) values->release_call);
    ebpf_write_end_chart();

    ebpf_write_begin_chart(type, NETDATA_SYSCALL_APPS_TASK_CLOSE, "");
    write_chart_dimension(process_publish_aggregated[NETDATA_KEY_PUBLISH_PROCESS_RELEASE_TASK].name,
                          (long long) values->release_call);
    ebpf_write_end_chart();

    if (em->mode < MODE_ENTRY) {
        ebpf_write_begin_chart(type, NETDATA_SYSCALL_APPS_TASK_ERROR, "");
        write_chart_dimension(process_publish_aggregated[NETDATA_KEY_PUBLISH_PROCESS_EXIT].name,
                              (long long) values->task_err);
        ebpf_write_end_chart();
    }
}

/**
 * Create specific process charts
 *
 * Create charts for cgroup/application
 *
 * @param type the chart type.
 * @param em   the structure with thread information
 */
static void ebpf_create_specific_process_charts(char *type, ebpf_module_t *em)
{
    ebpf_create_chart(type, NETDATA_SYSCALL_APPS_TASK_PROCESS, "Process started",
                      EBPF_COMMON_DIMENSION_CALL, NETDATA_PROCESS_CGROUP_GROUP,
                      NETDATA_CGROUP_PROCESS_CREATE_CONTEXT, NETDATA_EBPF_CHART_TYPE_LINE,
                      NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5000,
                      ebpf_create_global_dimension, &process_publish_aggregated[NETDATA_KEY_PUBLISH_PROCESS_FORK],
                      1, em->update_every, NETDATA_EBPF_MODULE_NAME_PROCESS);

    ebpf_create_chart(type, NETDATA_SYSCALL_APPS_TASK_THREAD, "Threads started",
                      EBPF_COMMON_DIMENSION_CALL, NETDATA_PROCESS_CGROUP_GROUP,
                      NETDATA_CGROUP_THREAD_CREATE_CONTEXT, NETDATA_EBPF_CHART_TYPE_LINE,
                      NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5001,
                      ebpf_create_global_dimension,
                      &process_publish_aggregated[NETDATA_KEY_PUBLISH_PROCESS_CLONE],
                      1, em->update_every, NETDATA_EBPF_MODULE_NAME_PROCESS);

    ebpf_create_chart(type, NETDATA_SYSCALL_APPS_TASK_EXIT, "Tasks starts exit process.",
                      EBPF_COMMON_DIMENSION_CALL, NETDATA_PROCESS_CGROUP_GROUP,
                      NETDATA_CGROUP_PROCESS_EXIT_CONTEXT,
                      NETDATA_EBPF_CHART_TYPE_LINE, NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5002,
                      ebpf_create_global_dimension,
                      &process_publish_aggregated[NETDATA_KEY_PUBLISH_PROCESS_EXIT],
                      1, em->update_every, NETDATA_EBPF_MODULE_NAME_PROCESS);

    ebpf_create_chart(type, NETDATA_SYSCALL_APPS_TASK_CLOSE, "Tasks closed",
                      EBPF_COMMON_DIMENSION_CALL, NETDATA_PROCESS_CGROUP_GROUP,
                      NETDATA_CGROUP_PROCESS_CLOSE_CONTEXT,
                      NETDATA_EBPF_CHART_TYPE_LINE, NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5003,
                      ebpf_create_global_dimension,
                      &process_publish_aggregated[NETDATA_KEY_PUBLISH_PROCESS_RELEASE_TASK],
                      1, em->update_every, NETDATA_EBPF_MODULE_NAME_PROCESS);

    if (em->mode < MODE_ENTRY) {
        ebpf_create_chart(type, NETDATA_SYSCALL_APPS_TASK_ERROR, "Errors to create process or threads.",
                          EBPF_COMMON_DIMENSION_CALL, NETDATA_PROCESS_CGROUP_GROUP,
                          NETDATA_CGROUP_PROCESS_ERROR_CONTEXT,
                          NETDATA_EBPF_CHART_TYPE_LINE, NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5004,
                          ebpf_create_global_dimension,
                          &process_publish_aggregated[NETDATA_KEY_PUBLISH_PROCESS_EXIT],
                          1, em->update_every, NETDATA_EBPF_MODULE_NAME_PROCESS);
    }
}

/**
 * Obsolete specific process charts
 *
 * Obsolete charts for cgroup/application
 *
 * @param type the chart type.
 * @param em   the structure with thread information
 */
static void ebpf_obsolete_specific_process_charts(char *type, ebpf_module_t *em)
{
    ebpf_write_chart_obsolete(type, NETDATA_SYSCALL_APPS_TASK_PROCESS, "", "Process started",
                              EBPF_COMMON_DIMENSION_CALL, NETDATA_PROCESS_GROUP, NETDATA_EBPF_CHART_TYPE_LINE,
                              NETDATA_CGROUP_PROCESS_CREATE_CONTEXT, NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5000,
                              em->update_every);

    ebpf_write_chart_obsolete(type, NETDATA_SYSCALL_APPS_TASK_THREAD, "", "Threads started",
                              EBPF_COMMON_DIMENSION_CALL, NETDATA_PROCESS_GROUP, NETDATA_EBPF_CHART_TYPE_LINE,
                              NETDATA_CGROUP_THREAD_CREATE_CONTEXT, NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5001,
                              em->update_every);

    ebpf_write_chart_obsolete(type, NETDATA_SYSCALL_APPS_TASK_EXIT, "","Tasks starts exit process.",
                              EBPF_COMMON_DIMENSION_CALL, NETDATA_PROCESS_GROUP, NETDATA_EBPF_CHART_TYPE_LINE,
                              NETDATA_CGROUP_PROCESS_EXIT_CONTEXT, NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5002,
                              em->update_every);

    ebpf_write_chart_obsolete(type, NETDATA_SYSCALL_APPS_TASK_CLOSE, "","Tasks closed",
                              EBPF_COMMON_DIMENSION_CALL, NETDATA_PROCESS_GROUP, NETDATA_EBPF_CHART_TYPE_LINE,
                              NETDATA_CGROUP_PROCESS_CLOSE_CONTEXT, NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5003,
                              em->update_every);

    if (em->mode < MODE_ENTRY) {
        ebpf_write_chart_obsolete(type, NETDATA_SYSCALL_APPS_TASK_ERROR, "","Errors to create process or threads.",
                                  EBPF_COMMON_DIMENSION_CALL, NETDATA_PROCESS_GROUP, NETDATA_EBPF_CHART_TYPE_LINE,
                                  NETDATA_CGROUP_PROCESS_ERROR_CONTEXT, NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5004,
                                  em->update_every);
    }
}

/**
 *  Create Systemd process Charts
 *
 *  Create charts when systemd is enabled
 *
 *  @param em   the structure with thread information
 **/
static void ebpf_create_systemd_process_charts(ebpf_module_t *em)
{
    ebpf_create_charts_on_systemd(NETDATA_SYSCALL_APPS_TASK_PROCESS, "Process started",
                                  EBPF_COMMON_DIMENSION_CALL, NETDATA_APPS_PROCESS_GROUP,
                                  NETDATA_EBPF_CHART_TYPE_STACKED, 20065,
                                  ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX], NETDATA_SYSTEMD_PROCESS_CREATE_CONTEXT,
                                  NETDATA_EBPF_MODULE_NAME_PROCESS, em->update_every);

    ebpf_create_charts_on_systemd(NETDATA_SYSCALL_APPS_TASK_THREAD, "Threads started",
                                  EBPF_COMMON_DIMENSION_CALL, NETDATA_APPS_PROCESS_GROUP,
                                  NETDATA_EBPF_CHART_TYPE_STACKED, 20066,
                                  ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX], NETDATA_SYSTEMD_THREAD_CREATE_CONTEXT,
                                  NETDATA_EBPF_MODULE_NAME_PROCESS, em->update_every);

    ebpf_create_charts_on_systemd(NETDATA_SYSCALL_APPS_TASK_CLOSE, "Tasks starts exit process.",
                                  EBPF_COMMON_DIMENSION_CALL, NETDATA_APPS_PROCESS_GROUP,
                                  NETDATA_EBPF_CHART_TYPE_STACKED, 20067,
                                  ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX], NETDATA_SYSTEMD_PROCESS_EXIT_CONTEXT,
                                  NETDATA_EBPF_MODULE_NAME_PROCESS, em->update_every);

    ebpf_create_charts_on_systemd(NETDATA_SYSCALL_APPS_TASK_EXIT, "Tasks closed",
                                  EBPF_COMMON_DIMENSION_CALL, NETDATA_APPS_PROCESS_GROUP,
                                  NETDATA_EBPF_CHART_TYPE_STACKED, 20068,
                                  ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX], NETDATA_SYSTEMD_PROCESS_CLOSE_CONTEXT,
                                  NETDATA_EBPF_MODULE_NAME_PROCESS, em->update_every);

    if (em->mode < MODE_ENTRY) {
        ebpf_create_charts_on_systemd(NETDATA_SYSCALL_APPS_TASK_ERROR, "Errors to create process or threads.",
                                      EBPF_COMMON_DIMENSION_CALL, NETDATA_APPS_PROCESS_GROUP,
                                      NETDATA_EBPF_CHART_TYPE_STACKED, 20069,
                                      ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX], NETDATA_SYSTEMD_PROCESS_ERROR_CONTEXT,
                                      NETDATA_EBPF_MODULE_NAME_PROCESS, em->update_every);
    }
}

/**
 * Send Systemd charts
 *
 * Send collected data to Netdata.
 *
 *  @param em   the structure with thread information
 */
static void ebpf_send_systemd_process_charts(ebpf_module_t *em)
{
    ebpf_cgroup_target_t *ect;
    ebpf_write_begin_chart(NETDATA_SERVICE_FAMILY, NETDATA_SYSCALL_APPS_TASK_PROCESS, "");
    for (ect = ebpf_cgroup_pids; ect ; ect = ect->next) {
        if (unlikely(ect->systemd) && unlikely(ect->updated)) {
            write_chart_dimension(ect->name, ect->publish_systemd_ps.create_process);
        }
    }
    ebpf_write_end_chart();

    ebpf_write_begin_chart(NETDATA_SERVICE_FAMILY, NETDATA_SYSCALL_APPS_TASK_THREAD, "");
    for (ect = ebpf_cgroup_pids; ect ; ect = ect->next) {
        if (unlikely(ect->systemd) && unlikely(ect->updated)) {
            write_chart_dimension(ect->name, ect->publish_systemd_ps.create_thread);
        }
    }
    ebpf_write_end_chart();

    ebpf_write_begin_chart(NETDATA_SERVICE_FAMILY, NETDATA_SYSCALL_APPS_TASK_EXIT, "");
    for (ect = ebpf_cgroup_pids; ect ; ect = ect->next) {
        if (unlikely(ect->systemd) && unlikely(ect->updated)) {
            write_chart_dimension(ect->name, ect->publish_systemd_ps.exit_call);
        }
    }
    ebpf_write_end_chart();

    ebpf_write_begin_chart(NETDATA_SERVICE_FAMILY, NETDATA_SYSCALL_APPS_TASK_CLOSE, "");
    for (ect = ebpf_cgroup_pids; ect ; ect = ect->next) {
        if (unlikely(ect->systemd) && unlikely(ect->updated)) {
            write_chart_dimension(ect->name, ect->publish_systemd_ps.release_call);
        }
    }
    ebpf_write_end_chart();

    if (em->mode < MODE_ENTRY) {
        ebpf_write_begin_chart(NETDATA_SERVICE_FAMILY, NETDATA_SYSCALL_APPS_TASK_ERROR, "");
        for (ect = ebpf_cgroup_pids; ect ; ect = ect->next) {
            if (unlikely(ect->systemd) && unlikely(ect->updated)) {
                write_chart_dimension(ect->name, ect->publish_systemd_ps.task_err);
            }
        }
        ebpf_write_end_chart();
    }
}

/**
 * Send data to Netdata calling auxiliary functions.
 *
 * @param em   the structure with thread information
*/
static void ebpf_process_send_cgroup_data(ebpf_module_t *em)
{
    if (!ebpf_cgroup_pids)
        return;

    pthread_mutex_lock(&mutex_cgroup_shm);
    ebpf_cgroup_target_t *ect;
    for (ect = ebpf_cgroup_pids; ect ; ect = ect->next) {
        ebpf_process_sum_cgroup_pids(&ect->publish_systemd_ps, ect->pids);
    }

    int has_systemd = shm_ebpf_cgroup.header->systemd_enabled;

    if (has_systemd) {
        if (send_cgroup_chart) {
            ebpf_create_systemd_process_charts(em);
        }

        ebpf_send_systemd_process_charts(em);
    }

    for (ect = ebpf_cgroup_pids; ect ; ect = ect->next) {
        if (ect->systemd)
            continue;

        if (!(ect->flags & NETDATA_EBPF_CGROUP_HAS_PROCESS_CHART) && ect->updated) {
            ebpf_create_specific_process_charts(ect->name, em);
            ect->flags |= NETDATA_EBPF_CGROUP_HAS_PROCESS_CHART;
        }

        if (ect->flags & NETDATA_EBPF_CGROUP_HAS_PROCESS_CHART) {
            if (ect->updated) {
                ebpf_send_specific_process_data(ect->name, &ect->publish_systemd_ps, em);
            } else {
                ebpf_obsolete_specific_process_charts(ect->name, em);
                ect->flags &= ~NETDATA_EBPF_CGROUP_HAS_PROCESS_CHART;
            }
        }
    }

    pthread_mutex_unlock(&mutex_cgroup_shm);
}

/**
 * Update Cgroup algorithm
 *
 * Change algorithm from absolute to incremental
 */
void ebpf_process_update_cgroup_algorithm()
{
    int i;
    for (i = 0; i < NETDATA_KEY_PUBLISH_PROCESS_END; i++)  {
        netdata_publish_syscall_t *ptr = &process_publish_aggregated[i];
        ptr->algorithm = ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX];
    }
}

/**
 * Main loop for this collector.
 *
 * @param em   the structure with thread information
 */
static void process_collector(ebpf_module_t *em)
{
    heartbeat_t hb;
    heartbeat_init(&hb);
    int publish_global = em->global_charts;
    int cgroups = em->cgroup_charts;
    pthread_mutex_lock(&ebpf_exit_cleanup);
    process_pid_fd = process_maps[NETDATA_PROCESS_PID_TABLE].map_fd;
    pthread_mutex_unlock(&ebpf_exit_cleanup);
    if (cgroups)
        ebpf_process_update_cgroup_algorithm();

    int update_every = em->update_every;
    int counter = update_every - 1;
    int maps_per_core = em->maps_per_core;
    uint32_t running_time = 0;
    uint32_t lifetime = em->lifetime;
    netdata_idx_t *stats = em->hash_table_stats;
    memset(stats, 0, sizeof(em->hash_table_stats));
    while (!ebpf_plugin_exit && running_time < lifetime) {
        usec_t dt = heartbeat_next(&hb, USEC_PER_SEC);
        (void)dt;
        if (ebpf_plugin_exit)
            break;

        if (++counter == update_every) {
            counter = 0;

            ebpf_read_process_hash_global_tables(stats, maps_per_core);

            netdata_apps_integration_flags_t apps_enabled = em->apps_charts;
            pthread_mutex_lock(&collect_data_mutex);

            if (ebpf_all_pids_count > 0) {
                if (cgroups && shm_ebpf_cgroup.header) {
                    ebpf_update_process_cgroup(maps_per_core);
                }
            }

            pthread_mutex_lock(&lock);

            if (publish_global) {
                ebpf_process_send_data(em);
            }

            if (apps_enabled & NETDATA_EBPF_APPS_FLAG_CHART_CREATED) {
                ebpf_process_send_apps_data(apps_groups_root_target, em);
            }

#ifdef NETDATA_DEV_MODE
            if (ebpf_aral_process_stat)
                ebpf_send_data_aral_chart(ebpf_aral_process_stat, em);
#endif

            if (cgroups && shm_ebpf_cgroup.header) {
                ebpf_process_send_cgroup_data(em);
            }

            pthread_mutex_unlock(&lock);
            pthread_mutex_unlock(&collect_data_mutex);

            pthread_mutex_lock(&ebpf_exit_cleanup);
            if (running_time && !em->running_time)
                running_time = update_every;
            else
                running_time += update_every;

            em->running_time = running_time;
            pthread_mutex_unlock(&ebpf_exit_cleanup);
        }

        fflush(stdout);
    }
}

/*****************************************************************
 *
 *  FUNCTIONS TO START THREAD
 *
 *****************************************************************/

/**
 * Allocate vectors used with this thread.
 * We are not testing the return, because callocz does this and shutdown the software
 * case it was not possible to allocate.
 *
 *  @param length is the length for the vectors used inside the collector.
 */
static void ebpf_process_allocate_global_vectors(size_t length)
{
    memset(process_aggregated_data, 0, length * sizeof(netdata_syscall_stat_t));
    memset(process_publish_aggregated, 0, length * sizeof(netdata_publish_syscall_t));
    process_hash_values = callocz(ebpf_nprocs, sizeof(netdata_idx_t));
    process_stat_vector = callocz(ebpf_nprocs, sizeof(ebpf_process_stat_t));

    global_process_stats = callocz((size_t)pid_max, sizeof(ebpf_process_stat_t *));
}

static void change_syscalls()
{
    static char *lfork = { "do_fork" };
    process_id_names[NETDATA_KEY_PUBLISH_PROCESS_FORK] = lfork;
}

/**
 * Set local variables
 *
 */
static void set_local_pointers()
{
    if (isrh >= NETDATA_MINIMUM_RH_VERSION && isrh < NETDATA_RH_8)
        change_syscalls();
}

/*****************************************************************
 *
 *  EBPF PROCESS THREAD
 *
 *****************************************************************/

/**
 * Enable tracepoints
 *
 * Enable necessary tracepoints for thread.
 *
 * @return  It returns 0 on success and -1 otherwise
 */
static int ebpf_process_enable_tracepoints()
{
    int test = ebpf_is_tracepoint_enabled(tracepoint_sched_type, tracepoint_sched_process_exit);
    if (test == -1)
        return -1;
    else if (!test) {
        if (ebpf_enable_tracing_values(tracepoint_sched_type, tracepoint_sched_process_exit))
            return -1;
    }
    was_sched_process_exit_enabled = test;

    test = ebpf_is_tracepoint_enabled(tracepoint_sched_type, tracepoint_sched_process_exec);
    if (test == -1)
        return -1;
    else if (!test) {
        if (ebpf_enable_tracing_values(tracepoint_sched_type, tracepoint_sched_process_exec))
            return -1;
    }
    was_sched_process_exec_enabled = test;

    test = ebpf_is_tracepoint_enabled(tracepoint_sched_type, tracepoint_sched_process_fork);
    if (test == -1)
        return -1;
    else if (!test) {
        if (ebpf_enable_tracing_values(tracepoint_sched_type, tracepoint_sched_process_fork))
            return -1;
    }
    was_sched_process_fork_enabled = test;

    return 0;
}

/**
 * Process thread
 *
 * Thread used to generate process charts.
 *
 * @param ptr a pointer to `struct ebpf_module`
 *
 * @return It always return NULL
 */
void *ebpf_process_thread(void *ptr)
{
    netdata_thread_cleanup_push(ebpf_process_exit, ptr);

    ebpf_module_t *em = (ebpf_module_t *)ptr;
    em->maps = process_maps;

    pthread_mutex_lock(&ebpf_exit_cleanup);
    if (ebpf_process_enable_tracepoints()) {
        em->enabled = em->global_charts = em->apps_charts = em->cgroup_charts = NETDATA_THREAD_EBPF_STOPPING;
    }
    pthread_mutex_unlock(&ebpf_exit_cleanup);

    pthread_mutex_lock(&lock);
    ebpf_process_allocate_global_vectors(NETDATA_KEY_PUBLISH_PROCESS_END);

    ebpf_update_pid_table(&process_maps[0], em);

    set_local_pointers();
    em->probe_links = ebpf_load_program(ebpf_plugin_dir, em, running_on_kernel, isrh, &em->objects);
    if (!em->probe_links) {
        em->enabled = em->global_charts = em->apps_charts = em->cgroup_charts = NETDATA_THREAD_EBPF_STOPPING;
    }

    int algorithms[NETDATA_KEY_PUBLISH_PROCESS_END] = {
        NETDATA_EBPF_ABSOLUTE_IDX, NETDATA_EBPF_ABSOLUTE_IDX, NETDATA_EBPF_ABSOLUTE_IDX, NETDATA_EBPF_ABSOLUTE_IDX
    };

    ebpf_global_labels(
        process_aggregated_data, process_publish_aggregated, process_dimension_names, process_id_names,
        algorithms, NETDATA_KEY_PUBLISH_PROCESS_END);

    ebpf_create_global_charts(em);

    ebpf_update_stats(&plugin_statistics, em);
    ebpf_update_kernel_memory_with_vector(&plugin_statistics, em->maps, EBPF_ACTION_STAT_ADD);

#ifdef NETDATA_DEV_MODE
    if (ebpf_aral_process_stat)
        process_disable_priority = ebpf_statistic_create_aral_chart(NETDATA_EBPF_PROC_ARAL_NAME, em);
#endif

    pthread_mutex_unlock(&lock);

    process_collector(em);

    pthread_mutex_lock(&ebpf_exit_cleanup);
    ebpf_update_disabled_plugin_stats(em);
    pthread_mutex_unlock(&ebpf_exit_cleanup);

    netdata_thread_cleanup_pop(1);
    return NULL;
}