[GitHub/moto-9609/android_kernel_motorola_exynos9610.git] /

#define _FILE_OFFSET_BITS 64

#include <sys/types.h>
#include <byteswap.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <linux/list.h>
#include <linux/kernel.h>

#include "util.h"
#include "header.h"
#include "../perf.h"
#include "trace-event.h"
#include "session.h"
#include "symbol.h"
#include "debug.h"

/*
 * Create new perf.data header attribute:
 */
struct perf_header_attr *perf_header_attr__new(struct perf_event_attr *attr)
{
        struct perf_header_attr *self = malloc(sizeof(*self));

        if (self != NULL) {
                self->attr = *attr;
                self->ids  = 0;
                self->size = 1;
                self->id   = malloc(sizeof(u64));
                if (self->id == NULL) {
                        free(self);
                        self = NULL;
                }
        }

        return self;
}

void perf_header_attr__delete(struct perf_header_attr *self)
{
        free(self->id);
        free(self);
}

int perf_header_attr__add_id(struct perf_header_attr *self, u64 id)
{
        int pos = self->ids;

        self->ids++;
        if (self->ids > self->size) {
                int nsize = self->size * 2;
                u64 *nid = realloc(self->id, nsize * sizeof(u64));

                if (nid == NULL)
                        return -1;

                self->size = nsize;
                self->id = nid;
        }
        self->id[pos] = id;
        return 0;
}

int perf_header__init(struct perf_header *self)
{
        self->size = 1;
        self->attr = malloc(sizeof(void *));
        return self->attr == NULL ? -ENOMEM : 0;
}

void perf_header__exit(struct perf_header *self)
{
        int i;
        for (i = 0; i < self->attrs; ++i)
                perf_header_attr__delete(self->attr[i]);
        free(self->attr);
}

int perf_header__add_attr(struct perf_header *self,
                          struct perf_header_attr *attr)
{
        if (self->frozen)
                return -1;

        if (self->attrs == self->size) {
                int nsize = self->size * 2;
                struct perf_header_attr **nattr;

                nattr = realloc(self->attr, nsize * sizeof(void *));
                if (nattr == NULL)
                        return -1;

                self->size = nsize;
                self->attr = nattr;
        }

        self->attr[self->attrs++] = attr;
        return 0;
}

static int event_count;
static struct perf_trace_event_type *events;

int perf_header__push_event(u64 id, const char *name)
{
        if (strlen(name) > MAX_EVENT_NAME)
                pr_warning("Event %s will be truncated\n", name);

        if (!events) {
                events = malloc(sizeof(struct perf_trace_event_type));
                if (events == NULL)
                        return -ENOMEM;
        } else {
                struct perf_trace_event_type *nevents;

                nevents = realloc(events, (event_count + 1) * sizeof(*events));
                if (nevents == NULL)
                        return -ENOMEM;
                events = nevents;
        }
        memset(&events[event_count], 0, sizeof(struct perf_trace_event_type));
        events[event_count].event_id = id;
        strncpy(events[event_count].name, name, MAX_EVENT_NAME - 1);
        event_count++;
        return 0;
}

char *perf_header__find_event(u64 id)
{
        int i;
        for (i = 0 ; i < event_count; i++) {
                if (events[i].event_id == id)
                        return events[i].name;
        }
        return NULL;
}

static const char *__perf_magic = "PERFFILE";

#define PERF_MAGIC      (*(u64 *)__perf_magic)

struct perf_file_attr {
        struct perf_event_attr  attr;
        struct perf_file_section        ids;
};

void perf_header__set_feat(struct perf_header *self, int feat)
{
        set_bit(feat, self->adds_features);
}

bool perf_header__has_feat(const struct perf_header *self, int feat)
{
        return test_bit(feat, self->adds_features);
}

static int do_write(int fd, const void *buf, size_t size)
{
        while (size) {
                int ret = write(fd, buf, size);

                if (ret < 0)
                        return -errno;

                size -= ret;
                buf += ret;
        }

        return 0;
}

#define NAME_ALIGN 64

static int write_padded(int fd, const void *bf, size_t count,
                        size_t count_aligned)
{
        static const char zero_buf[NAME_ALIGN];
        int err = do_write(fd, bf, count);

        if (!err)
                err = do_write(fd, zero_buf, count_aligned - count);

        return err;
}

#define dsos__for_each_with_build_id(pos, head) \
        list_for_each_entry(pos, head, node)    \
                if (!pos->has_build_id)         \
                        continue;               \
                else

static int __dsos__write_buildid_table(struct list_head *head, u16 misc, int fd)
{
        struct dso *pos;

        dsos__for_each_with_build_id(pos, head) {
                int err;
                struct build_id_event b;
                size_t len;

                if (!pos->hit)
                        continue;
                len = pos->long_name_len + 1;
                len = ALIGN(len, NAME_ALIGN);
                memset(&b, 0, sizeof(b));
                memcpy(&b.build_id, pos->build_id, sizeof(pos->build_id));
                b.header.misc = misc;
                b.header.size = sizeof(b) + len;
                err = do_write(fd, &b, sizeof(b));
                if (err < 0)
                        return err;
                err = write_padded(fd, pos->long_name,
                                   pos->long_name_len + 1, len);
                if (err < 0)
                        return err;
        }

        return 0;
}

static int dsos__write_buildid_table(int fd)
{
        int err = __dsos__write_buildid_table(&dsos__kernel,
                                              PERF_RECORD_MISC_KERNEL, fd);
        if (err == 0)
                err = __dsos__write_buildid_table(&dsos__user,
                                                  PERF_RECORD_MISC_USER, fd);
        return err;
}

int build_id_cache__add_s(const char *sbuild_id, const char *debugdir,
                          const char *name, bool is_kallsyms)
{
        const size_t size = PATH_MAX;
        char *filename = malloc(size),
             *linkname = malloc(size), *targetname;
        int len, err = -1;

        if (filename == NULL || linkname == NULL)
                goto out_free;

        len = snprintf(filename, size, "%s%s%s",
                       debugdir, is_kallsyms ? "/" : "", name);
        if (mkdir_p(filename, 0755))
                goto out_free;

        snprintf(filename + len, sizeof(filename) - len, "/%s", sbuild_id);

        if (access(filename, F_OK)) {
                if (is_kallsyms) {
                         if (copyfile("/proc/kallsyms", filename))
                                goto out_free;
                } else if (link(name, filename) && copyfile(name, filename))
                        goto out_free;
        }

        len = snprintf(linkname, size, "%s/.build-id/%.2s",
                       debugdir, sbuild_id);

        if (access(linkname, X_OK) && mkdir_p(linkname, 0755))
                goto out_free;

        snprintf(linkname + len, size - len, "/%s", sbuild_id + 2);
        targetname = filename + strlen(debugdir) - 5;
        memcpy(targetname, "../..", 5);

        if (symlink(targetname, linkname) == 0)
                err = 0;
out_free:
        free(filename);
        free(linkname);
        return err;
}

static int build_id_cache__add_b(const u8 *build_id, size_t build_id_size,
                                 const char *name, const char *debugdir,
                                 bool is_kallsyms)
{
        char sbuild_id[BUILD_ID_SIZE * 2 + 1];

        build_id__sprintf(build_id, build_id_size, sbuild_id);

        return build_id_cache__add_s(sbuild_id, debugdir, name, is_kallsyms);
}

int build_id_cache__remove_s(const char *sbuild_id, const char *debugdir)
{
        const size_t size = PATH_MAX;
        char *filename = malloc(size),
             *linkname = malloc(size);
        int err = -1;

        if (filename == NULL || linkname == NULL)
                goto out_free;

        snprintf(linkname, size, "%s/.build-id/%.2s/%s",
                 debugdir, sbuild_id, sbuild_id + 2);

        if (access(linkname, F_OK))
                goto out_free;

        if (readlink(linkname, filename, size) < 0)
                goto out_free;

        if (unlink(linkname))
                goto out_free;

        /*
         * Since the link is relative, we must make it absolute:
         */
        snprintf(linkname, size, "%s/.build-id/%.2s/%s",
                 debugdir, sbuild_id, filename);

        if (unlink(linkname))
                goto out_free;

        err = 0;
out_free:
        free(filename);
        free(linkname);
        return err;
}

static int dso__cache_build_id(struct dso *self, const char *debugdir)
{
        bool is_kallsyms = self->kernel && self->long_name[0] != '/';

        return build_id_cache__add_b(self->build_id, sizeof(self->build_id),
                                     self->long_name, debugdir, is_kallsyms);
}

static int __dsos__cache_build_ids(struct list_head *head, const char *debugdir)
{
        struct dso *pos;
        int err = 0;

        dsos__for_each_with_build_id(pos, head)
                if (dso__cache_build_id(pos, debugdir))
                        err = -1;

        return err;
}

static int dsos__cache_build_ids(void)
{
        int err_kernel, err_user;
        char debugdir[PATH_MAX];

        snprintf(debugdir, sizeof(debugdir), "%s/%s", getenv("HOME"),
                 DEBUG_CACHE_DIR);

        if (mkdir(debugdir, 0755) != 0 && errno != EEXIST)
                return -1;

        err_kernel = __dsos__cache_build_ids(&dsos__kernel, debugdir);
        err_user   = __dsos__cache_build_ids(&dsos__user, debugdir);
        return err_kernel || err_user ? -1 : 0;
}

static int perf_header__adds_write(struct perf_header *self, int fd)
{
        int nr_sections;
        struct perf_file_section *feat_sec;
        int sec_size;
        u64 sec_start;
        int idx = 0, err;

        if (dsos__read_build_ids(true))
                perf_header__set_feat(self, HEADER_BUILD_ID);

        nr_sections = bitmap_weight(self->adds_features, HEADER_FEAT_BITS);
        if (!nr_sections)
                return 0;

        feat_sec = calloc(sizeof(*feat_sec), nr_sections);
        if (feat_sec == NULL)
                return -ENOMEM;

        sec_size = sizeof(*feat_sec) * nr_sections;

        sec_start = self->data_offset + self->data_size;
        lseek(fd, sec_start + sec_size, SEEK_SET);

        if (perf_header__has_feat(self, HEADER_TRACE_INFO)) {
                struct perf_file_section *trace_sec;

                trace_sec = &feat_sec[idx++];

                /* Write trace info */
                trace_sec->offset = lseek(fd, 0, SEEK_CUR);
                read_tracing_data(fd, attrs, nr_counters);
                trace_sec->size = lseek(fd, 0, SEEK_CUR) - trace_sec->offset;
        }


        if (perf_header__has_feat(self, HEADER_BUILD_ID)) {
                struct perf_file_section *buildid_sec;

                buildid_sec = &feat_sec[idx++];

                /* Write build-ids */
                buildid_sec->offset = lseek(fd, 0, SEEK_CUR);
                err = dsos__write_buildid_table(fd);
                if (err < 0) {
                        pr_debug("failed to write buildid table\n");
                        goto out_free;
                }
                buildid_sec->size = lseek(fd, 0, SEEK_CUR) -
                                          buildid_sec->offset;
                dsos__cache_build_ids();
        }

        lseek(fd, sec_start, SEEK_SET);
        err = do_write(fd, feat_sec, sec_size);
        if (err < 0)
                pr_debug("failed to write feature section\n");
out_free:
        free(feat_sec);
        return err;
}

int perf_header__write_pipe(int fd)
{
        struct perf_pipe_file_header f_header;
        int err;

        f_header = (struct perf_pipe_file_header){
                .magic     = PERF_MAGIC,
                .size      = sizeof(f_header),
        };

        err = do_write(fd, &f_header, sizeof(f_header));
        if (err < 0) {
                pr_debug("failed to write perf pipe header\n");
                return err;
        }

        return 0;
}

int perf_header__write(struct perf_header *self, int fd, bool at_exit)
{
        struct perf_file_header f_header;
        struct perf_file_attr   f_attr;
        struct perf_header_attr *attr;
        int i, err;

        lseek(fd, sizeof(f_header), SEEK_SET);


        for (i = 0; i < self->attrs; i++) {
                attr = self->attr[i];

                attr->id_offset = lseek(fd, 0, SEEK_CUR);
                err = do_write(fd, attr->id, attr->ids * sizeof(u64));
                if (err < 0) {
                        pr_debug("failed to write perf header\n");
                        return err;
                }
        }


        self->attr_offset = lseek(fd, 0, SEEK_CUR);

        for (i = 0; i < self->attrs; i++) {
                attr = self->attr[i];

                f_attr = (struct perf_file_attr){
                        .attr = attr->attr,
                        .ids  = {
                                .offset = attr->id_offset,
                                .size   = attr->ids * sizeof(u64),
                        }
                };
                err = do_write(fd, &f_attr, sizeof(f_attr));
                if (err < 0) {
                        pr_debug("failed to write perf header attribute\n");
                        return err;
                }
        }

        self->event_offset = lseek(fd, 0, SEEK_CUR);
        self->event_size = event_count * sizeof(struct perf_trace_event_type);
        if (events) {
                err = do_write(fd, events, self->event_size);
                if (err < 0) {
                        pr_debug("failed to write perf header events\n");
                        return err;
                }
        }

        self->data_offset = lseek(fd, 0, SEEK_CUR);

        if (at_exit) {
                err = perf_header__adds_write(self, fd);
                if (err < 0)
                        return err;
        }

        f_header = (struct perf_file_header){
                .magic     = PERF_MAGIC,
                .size      = sizeof(f_header),
                .attr_size = sizeof(f_attr),
                .attrs = {
                        .offset = self->attr_offset,
                        .size   = self->attrs * sizeof(f_attr),
                },
                .data = {
                        .offset = self->data_offset,
                        .size   = self->data_size,
                },
                .event_types = {
                        .offset = self->event_offset,
                        .size   = self->event_size,
                },
        };

        memcpy(&f_header.adds_features, &self->adds_features, sizeof(self->adds_features));

        lseek(fd, 0, SEEK_SET);
        err = do_write(fd, &f_header, sizeof(f_header));
        if (err < 0) {
                pr_debug("failed to write perf header\n");
                return err;
        }
        lseek(fd, self->data_offset + self->data_size, SEEK_SET);

        self->frozen = 1;
        return 0;
}

static int perf_header__getbuffer64(struct perf_header *self,
                                    int fd, void *buf, size_t size)
{
        if (do_read(fd, buf, size) <= 0)
                return -1;

        if (self->needs_swap)
                mem_bswap_64(buf, size);

        return 0;
}

int perf_header__process_sections(struct perf_header *self, int fd,
                                  int (*process)(struct perf_file_section *self,
                                                 struct perf_header *ph,
                                                 int feat, int fd))
{
        struct perf_file_section *feat_sec;
        int nr_sections;
        int sec_size;
        int idx = 0;
        int err = -1, feat = 1;

        nr_sections = bitmap_weight(self->adds_features, HEADER_FEAT_BITS);
        if (!nr_sections)
                return 0;

        feat_sec = calloc(sizeof(*feat_sec), nr_sections);
        if (!feat_sec)
                return -1;

        sec_size = sizeof(*feat_sec) * nr_sections;

        lseek(fd, self->data_offset + self->data_size, SEEK_SET);

        if (perf_header__getbuffer64(self, fd, feat_sec, sec_size))
                goto out_free;

        err = 0;
        while (idx < nr_sections && feat < HEADER_LAST_FEATURE) {
                if (perf_header__has_feat(self, feat)) {
                        struct perf_file_section *sec = &feat_sec[idx++];

                        err = process(sec, self, feat, fd);
                        if (err < 0)
                                break;
                }
                ++feat;
        }
out_free:
        free(feat_sec);
        return err;
}

int perf_file_header__read(struct perf_file_header *self,
                           struct perf_header *ph, int fd)
{
        lseek(fd, 0, SEEK_SET);

        if (do_read(fd, self, sizeof(*self)) <= 0 ||
            memcmp(&self->magic, __perf_magic, sizeof(self->magic)))
                return -1;

        if (self->attr_size != sizeof(struct perf_file_attr)) {
                u64 attr_size = bswap_64(self->attr_size);

                if (attr_size != sizeof(struct perf_file_attr))
                        return -1;

                mem_bswap_64(self, offsetof(struct perf_file_header,
                                            adds_features));
                ph->needs_swap = true;
        }

        if (self->size != sizeof(*self)) {
                /* Support the previous format */
                if (self->size == offsetof(typeof(*self), adds_features))
                        bitmap_zero(self->adds_features, HEADER_FEAT_BITS);
                else
                        return -1;
        }

        memcpy(&ph->adds_features, &self->adds_features,
               sizeof(ph->adds_features));
        /*
         * FIXME: hack that assumes that if we need swap the perf.data file
         * may be coming from an arch with a different word-size, ergo different
         * DEFINE_BITMAP format, investigate more later, but for now its mostly
         * safe to assume that we have a build-id section. Trace files probably
         * have several other issues in this realm anyway...
         */
        if (ph->needs_swap) {
                memset(&ph->adds_features, 0, sizeof(ph->adds_features));
                perf_header__set_feat(ph, HEADER_BUILD_ID);
        }

        ph->event_offset = self->event_types.offset;
        ph->event_size   = self->event_types.size;
        ph->data_offset  = self->data.offset;
        ph->data_size    = self->data.size;
        return 0;
}

static int perf_file_section__process(struct perf_file_section *self,
                                      struct perf_header *ph,
                                      int feat, int fd)
{
        if (lseek(fd, self->offset, SEEK_SET) == (off_t)-1) {
                pr_debug("Failed to lseek to %Ld offset for feature %d, "
                         "continuing...\n", self->offset, feat);
                return 0;
        }

        switch (feat) {
        case HEADER_TRACE_INFO:
                trace_report(fd);
                break;

        case HEADER_BUILD_ID:
                if (perf_header__read_build_ids(ph, fd, self->offset, self->size))
                        pr_debug("Failed to read buildids, continuing...\n");
                break;
        default:
                pr_debug("unknown feature %d, continuing...\n", feat);
        }

        return 0;
}

static int perf_file_header__read_pipe(struct perf_pipe_file_header *self,
                                       struct perf_header *ph, int fd)
{
        if (do_read(fd, self, sizeof(*self)) <= 0 ||
            memcmp(&self->magic, __perf_magic, sizeof(self->magic)))
                return -1;

        if (self->size != sizeof(*self)) {
                u64 size = bswap_64(self->size);

                if (size != sizeof(*self))
                        return -1;

                ph->needs_swap = true;
        }

        return 0;
}

static int perf_header__read_pipe(struct perf_session *session, int fd)
{
        struct perf_header *self = &session->header;
        struct perf_pipe_file_header f_header;

        if (perf_file_header__read_pipe(&f_header, self, fd) < 0) {
                pr_debug("incompatible file format\n");
                return -EINVAL;
        }

        session->fd = fd;

        return 0;
}

int perf_header__read(struct perf_session *session, int fd)
{
        struct perf_header *self = &session->header;
        struct perf_file_header f_header;
        struct perf_file_attr   f_attr;
        u64                     f_id;
        int nr_attrs, nr_ids, i, j;

        if (session->fd_pipe)
                return perf_header__read_pipe(session, fd);

        if (perf_file_header__read(&f_header, self, fd) < 0) {
                pr_debug("incompatible file format\n");
                return -EINVAL;
        }

        nr_attrs = f_header.attrs.size / sizeof(f_attr);
        lseek(fd, f_header.attrs.offset, SEEK_SET);

        for (i = 0; i < nr_attrs; i++) {
                struct perf_header_attr *attr;
                off_t tmp;

                if (perf_header__getbuffer64(self, fd, &f_attr, sizeof(f_attr)))
                        goto out_errno;

                tmp = lseek(fd, 0, SEEK_CUR);

                attr = perf_header_attr__new(&f_attr.attr);
                if (attr == NULL)
                         return -ENOMEM;

                nr_ids = f_attr.ids.size / sizeof(u64);
                lseek(fd, f_attr.ids.offset, SEEK_SET);

                for (j = 0; j < nr_ids; j++) {
                        if (perf_header__getbuffer64(self, fd, &f_id, sizeof(f_id)))
                                goto out_errno;

                        if (perf_header_attr__add_id(attr, f_id) < 0) {
                                perf_header_attr__delete(attr);
                                return -ENOMEM;
                        }
                }
                if (perf_header__add_attr(self, attr) < 0) {
                        perf_header_attr__delete(attr);
                        return -ENOMEM;
                }

                lseek(fd, tmp, SEEK_SET);
        }

        if (f_header.event_types.size) {
                lseek(fd, f_header.event_types.offset, SEEK_SET);
                events = malloc(f_header.event_types.size);
                if (events == NULL)
                        return -ENOMEM;
                if (perf_header__getbuffer64(self, fd, events,
                                             f_header.event_types.size))
                        goto out_errno;
                event_count =  f_header.event_types.size / sizeof(struct perf_trace_event_type);
        }

        perf_header__process_sections(self, fd, perf_file_section__process);

        lseek(fd, self->data_offset, SEEK_SET);

        self->frozen = 1;
        return 0;
out_errno:
        return -errno;
}

u64 perf_header__sample_type(struct perf_header *header)
{
        u64 type = 0;
        int i;

        for (i = 0; i < header->attrs; i++) {
                struct perf_header_attr *attr = header->attr[i];

                if (!type)
                        type = attr->attr.sample_type;
                else if (type != attr->attr.sample_type)
                        die("non matching sample_type");
        }

        return type;
}

struct perf_event_attr *
perf_header__find_attr(u64 id, struct perf_header *header)
{
        int i;

        for (i = 0; i < header->attrs; i++) {
                struct perf_header_attr *attr = header->attr[i];
                int j;

                for (j = 0; j < attr->ids; j++) {
                        if (attr->id[j] == id)
                                return &attr->attr;
                }
        }

        return NULL;
}

int event__synthesize_attr(struct perf_event_attr *attr, u16 ids, u64 *id,
                           event__handler_t process,
                           struct perf_session *session)
{
        event_t *ev;
        size_t size;
        int err;

        size = sizeof(struct perf_event_attr);
        size = ALIGN(size, sizeof(u64));
        size += sizeof(struct perf_event_header);
        size += ids * sizeof(u64);

        ev = malloc(size);

        ev->attr.attr = *attr;
        memcpy(ev->attr.id, id, ids * sizeof(u64));

        ev->attr.header.type = PERF_RECORD_HEADER_ATTR;
        ev->attr.header.size = size;

        err = process(ev, session);

        free(ev);

        return err;
}

int event__synthesize_attrs(struct perf_header *self,
                            event__handler_t process,
                            struct perf_session *session)
{
        struct perf_header_attr *attr;
        int i, err = 0;

        for (i = 0; i < self->attrs; i++) {
                attr = self->attr[i];

                err = event__synthesize_attr(&attr->attr, attr->ids, attr->id,
                                             process, session);
                if (err) {
                        pr_debug("failed to create perf header attribute\n");
                        return err;
                }
        }

        return err;
}

int event__process_attr(event_t *self, struct perf_session *session)
{
        struct perf_header_attr *attr;
        unsigned int i, ids, n_ids;

        attr = perf_header_attr__new(&self->attr.attr);
        if (attr == NULL)
                return -ENOMEM;

        ids = self->header.size;
        ids -= (void *)&self->attr.id - (void *)self;
        n_ids = ids / sizeof(u64);

        for (i = 0; i < n_ids; i++) {
                if (perf_header_attr__add_id(attr, self->attr.id[i]) < 0) {
                        perf_header_attr__delete(attr);
                        return -ENOMEM;
                }
        }

        if (perf_header__add_attr(&session->header, attr) < 0) {
                perf_header_attr__delete(attr);
                return -ENOMEM;
        }

        perf_session__update_sample_type(session);

        return 0;
}

int event__synthesize_event_type(u64 event_id, char *name,
                                 event__handler_t process,
                                 struct perf_session *session)
{
        event_t ev;
        size_t size = 0;
        int err = 0;

        memset(&ev, 0, sizeof(ev));

        ev.event_type.event_type.event_id = event_id;
        memset(ev.event_type.event_type.name, 0, MAX_EVENT_NAME);
        strncpy(ev.event_type.event_type.name, name, MAX_EVENT_NAME - 1);

        ev.event_type.header.type = PERF_RECORD_HEADER_EVENT_TYPE;
        size = strlen(name);
        size = ALIGN(size, sizeof(u64));
        ev.event_type.header.size = sizeof(ev.event_type) -
                (sizeof(ev.event_type.event_type.name) - size);

        err = process(&ev, session);

        return err;
}

int event__synthesize_event_types(event__handler_t process,
                                  struct perf_session *session)
{
        struct perf_trace_event_type *type;
        int i, err = 0;

        for (i = 0; i < event_count; i++) {
                type = &events[i];

                err = event__synthesize_event_type(type->event_id, type->name,
                                                   process, session);
                if (err) {
                        pr_debug("failed to create perf header event type\n");
                        return err;
                }
        }

        return err;
}

int event__process_event_type(event_t *self,
                              struct perf_session *session __unused)
{
        if (perf_header__push_event(self->event_type.event_type.event_id,
                                    self->event_type.event_type.name) < 0)
                return -ENOMEM;

        return 0;
}