C++ (Cpp) perf_session__read_header Examples

Example #1

File: session.c Project: allfs/linux

static int perf_session__open(struct perf_session *session)
{
	struct perf_data_file *file = session->file;

	if (perf_session__read_header(session) < 0) {
		pr_err("incompatible file format (rerun with -v to learn more)");
		return -1;
	}

	if (perf_data_file__is_pipe(file))
		return 0;

	if (!perf_evlist__valid_sample_type(session->evlist)) {
		pr_err("non matching sample_type");
		return -1;
	}

	if (!perf_evlist__valid_sample_id_all(session->evlist)) {
		pr_err("non matching sample_id_all");
		return -1;
	}

	if (!perf_evlist__valid_read_format(session->evlist)) {
		pr_err("non matching read_format");
		return -1;
	}

	return 0;
}

Example #2

File: session.c Project: OliverGesch/linux

static int perf_session__open(struct perf_session *self, bool force)
{
	struct stat input_stat;

	if (!strcmp(self->filename, "-")) {
		self->fd_pipe = true;
		self->fd = STDIN_FILENO;

		if (perf_session__read_header(self) < 0)
			pr_err("incompatible file format (rerun with -v to learn more)");

		return 0;
	}

	self->fd = open(self->filename, O_RDONLY);
	if (self->fd < 0) {
		int err = errno;

		pr_err("failed to open %s: %s", self->filename, strerror(err));
		if (err == ENOENT && !strcmp(self->filename, "perf.data"))
			pr_err("  (try 'perf record' first)");
		pr_err("\n");
		return -errno;
	}

	if (fstat(self->fd, &input_stat) < 0)
		goto out_close;

	if (!force && input_stat.st_uid && (input_stat.st_uid != geteuid())) {
		pr_err("file %s not owned by current user or root\n",
		       self->filename);
		goto out_close;
	}

	if (!input_stat.st_size) {
		pr_info("zero-sized file (%s), nothing to do!\n",
			self->filename);
		goto out_close;
	}

	if (perf_session__read_header(self) < 0) {
		pr_err("incompatible file format (rerun with -v to learn more)");
		goto out_close;
	}

	if (!perf_evlist__valid_sample_type(self->evlist)) {
		pr_err("non matching sample_type");
		goto out_close;
	}

	if (!perf_evlist__valid_sample_id_all(self->evlist)) {
		pr_err("non matching sample_id_all");
		goto out_close;
	}

	if (!perf_evlist__valid_read_format(self->evlist)) {
		pr_err("non matching read_format");
		goto out_close;
	}

	self->size = input_stat.st_size;
	return 0;

out_close:
	close(self->fd);
	self->fd = -1;
	return -1;
}