+ out = open_memstream(buf, &size);
+ if (out == NULL)
+ return -errno;
+
+ for (;;) {
+ ret = ctf_open_trace_metadata_packet_read(td, in, out);
+ if (ret) {
+ break;
+ }
+ if (feof(in)) {
+ ret = 0;
+ break;
+ }
+ }
+ fclose(out); /* flush the buffer */
+ fclose(in);
+ /* open for reading */
+ *fp = fmemopen(*buf, strlen(*buf), "rb");
+ return 0;
+}
+
+static
+int ctf_open_trace_metadata_read(struct ctf_trace *td)
+{
+ struct ctf_scanner *scanner;
+ FILE *fp;
+ char *buf = NULL;
+ int ret = 0;
+
+ td->metadata.pos.fd = openat(td->dirfd, "metadata", O_RDONLY);
+ if (td->metadata.pos.fd < 0) {
+ fprintf(stdout, "Unable to open metadata.\n");
+ return td->metadata.pos.fd;
+ }
+
+ if (babeltrace_debug)
+ yydebug = 1;
+
+ fp = fdopen(td->metadata.pos.fd, "r");
+ if (!fp) {
+ fprintf(stdout, "[error] Unable to open metadata stream.\n");
+ ret = -errno;
+ goto end_stream;
+ }
+
+ if (packet_metadata(td, fp)) {
+ ret = ctf_open_trace_metadata_stream_read(td, &fp, &buf);
+ if (ret)
+ goto end_packet_read;
+ }
+
+ scanner = ctf_scanner_alloc(fp);
+ if (!scanner) {
+ fprintf(stdout, "[error] Error allocating scanner\n");
+ ret = -ENOMEM;
+ goto end_scanner_alloc;
+ }
+ ret = ctf_scanner_append_ast(scanner);
+ if (ret) {
+ fprintf(stdout, "[error] Error creating AST\n");
+ goto end;
+ }
+
+ if (babeltrace_debug) {
+ ret = ctf_visitor_print_xml(stdout, 0, &scanner->ast->root);
+ if (ret) {
+ fprintf(stdout, "[error] Error visiting AST for XML output\n");
+ goto end;
+ }
+ }
+
+ ret = ctf_visitor_semantic_check(stdout, 0, &scanner->ast->root);
+ if (ret) {
+ fprintf(stdout, "[error] Error in CTF semantic validation %d\n", ret);
+ goto end;
+ }
+ ret = ctf_visitor_construct_metadata(stdout, 0, &scanner->ast->root,
+ td, BYTE_ORDER);
+ if (ret) {
+ fprintf(stdout, "[error] Error in CTF metadata constructor %d\n", ret);
+ goto end;
+ }
+end:
+ ctf_scanner_free(scanner);
+end_scanner_alloc:
+end_packet_read:
+ fclose(fp);
+ free(buf);
+end_stream:
+ close(td->metadata.pos.fd);
+ return ret;
+}
+
+
+static
+int create_stream_packet_index(struct ctf_trace *td,
+ struct ctf_file_stream *file_stream)
+{
+ struct ctf_stream_class *stream;
+ int len_index;
+ struct ctf_stream_pos *pos;
+ struct stat filestats;
+ struct packet_index packet_index;
+ int first_packet = 1;
+ int ret;
+
+ pos = &file_stream->pos;
+
+ ret = fstat(pos->fd, &filestats);
+ if (ret < 0)
+ return ret;
+
+ for (pos->mmap_offset = 0; pos->mmap_offset < filestats.st_size; ) {
+ uint64_t stream_id = 0;
+
+ if (pos->base) {
+ /* unmap old base */
+ ret = munmap(pos->base, pos->packet_size / CHAR_BIT);
+ if (ret) {
+ fprintf(stdout, "[error] Unable to unmap old base: %s.\n",
+ strerror(errno));
+ return ret;
+ }
+ pos->base = NULL;
+ }
+ /* map new base. Need mapping length from header. */
+ pos->base = mmap(NULL, MAX_PACKET_HEADER_LEN / CHAR_BIT, PROT_READ,
+ MAP_PRIVATE, pos->fd, pos->mmap_offset);
+ pos->content_size = MAX_PACKET_HEADER_LEN; /* Unknown at this point */
+ pos->packet_size = MAX_PACKET_HEADER_LEN; /* Unknown at this point */
+ pos->offset = 0; /* Position of the packet header */
+
+ packet_index.offset = pos->mmap_offset;
+ packet_index.content_size = 0;
+ packet_index.packet_size = 0;
+
+ /* read and check header, set stream id (and check) */
+ if (td->packet_header) {
+ /* Read packet header */
+ ret = generic_rw(&pos->parent, &td->packet_header->p);
+ if (ret)
+ return ret;
+ len_index = struct_declaration_lookup_field_index(td->packet_header->declaration, g_quark_from_static_string("magic"));
+ if (len_index >= 0) {
+ struct definition_integer *defint;
+ struct definition *field;
+
+ field = struct_definition_get_field_from_index(td->packet_header, len_index);
+ assert(field->declaration->id == CTF_TYPE_INTEGER);
+ defint = container_of(field, struct definition_integer, p);
+ assert(defint->declaration->signedness == FALSE);
+ if (defint->value._unsigned != CTF_MAGIC) {
+ fprintf(stdout, "[error] Invalid magic number 0x%" PRIX64 " at packet %u (file offset %zd).\n",
+ defint->value._unsigned,
+ file_stream->pos.packet_index->len,
+ (ssize_t) pos->mmap_offset);
+ return -EINVAL;
+ }
+ }
+
+ /* check uuid */
+ len_index = struct_declaration_lookup_field_index(td->packet_header->declaration, g_quark_from_static_string("uuid"));
+ if (len_index >= 0) {
+ struct definition_array *defarray;
+ struct definition *field;
+ uint64_t i;
+ uint8_t uuidval[UUID_LEN];
+
+ field = struct_definition_get_field_from_index(td->packet_header, len_index);
+ assert(field->declaration->id == CTF_TYPE_ARRAY);
+ defarray = container_of(field, struct definition_array, p);
+ assert(array_len(defarray) == UUID_LEN);
+ assert(defarray->declaration->elem->id == CTF_TYPE_INTEGER);
+
+ for (i = 0; i < UUID_LEN; i++) {
+ struct definition *elem;
+ struct definition_integer *defint;
+
+ elem = array_index(defarray, i);
+ assert(elem);
+ defint = container_of(elem, struct definition_integer, p);
+ uuidval[i] = defint->value._unsigned;
+ }
+ ret = uuid_compare(td->uuid, uuidval);
+ if (ret) {
+ fprintf(stdout, "[error] Unique Universal Identifiers do not match.\n");
+ return -EINVAL;
+ }
+ }
+
+
+ len_index = struct_declaration_lookup_field_index(td->packet_header->declaration, g_quark_from_static_string("stream_id"));
+ if (len_index >= 0) {
+ struct definition_integer *defint;
+ struct definition *field;
+
+ field = struct_definition_get_field_from_index(td->packet_header, len_index);
+ assert(field->declaration->id == CTF_TYPE_INTEGER);
+ defint = container_of(field, struct definition_integer, p);
+ assert(defint->declaration->signedness == FALSE);
+ stream_id = defint->value._unsigned;
+ }
+ }
+
+ if (!first_packet && file_stream->stream_id != stream_id) {
+ fprintf(stdout, "[error] Stream ID is changing within a stream.\n");
+ return -EINVAL;
+ }
+ if (first_packet) {
+ file_stream->stream_id = stream_id;
+ if (stream_id >= td->streams->len) {
+ fprintf(stdout, "[error] Stream %" PRIu64 " is not declared in metadata.\n", stream_id);
+ return -EINVAL;
+ }
+ stream = g_ptr_array_index(td->streams, stream_id);
+ if (!stream) {
+ fprintf(stdout, "[error] Stream %" PRIu64 " is not declared in metadata.\n", stream_id);
+ return -EINVAL;
+ }
+ file_stream->stream.stream_class = stream;
+ }
+ first_packet = 0;
+
+ if (stream->packet_context) {
+ /* Read packet context */
+ ret = generic_rw(&pos->parent, &stream->packet_context->p);
+ if (ret)
+ return ret;
+ /* read content size from header */
+ len_index = struct_declaration_lookup_field_index(stream->packet_context->declaration, g_quark_from_static_string("content_size"));
+ if (len_index >= 0) {
+ struct definition_integer *defint;
+ struct definition *field;
+
+ field = struct_definition_get_field_from_index(stream->packet_context, len_index);
+ assert(field->declaration->id == CTF_TYPE_INTEGER);
+ defint = container_of(field, struct definition_integer, p);
+ assert(defint->declaration->signedness == FALSE);
+ packet_index.content_size = defint->value._unsigned;
+ } else {
+ /* Use file size for packet size */
+ packet_index.content_size = filestats.st_size * CHAR_BIT;
+ }
+
+ /* read packet size from header */
+ len_index = struct_declaration_lookup_field_index(stream->packet_context->declaration, g_quark_from_static_string("packet_size"));
+ if (len_index >= 0) {
+ struct definition_integer *defint;
+ struct definition *field;
+
+ field = struct_definition_get_field_from_index(stream->packet_context, len_index);
+ assert(field->declaration->id == CTF_TYPE_INTEGER);
+ defint = container_of(field, struct definition_integer, p);
+ assert(defint->declaration->signedness == FALSE);
+ packet_index.packet_size = defint->value._unsigned;
+ } else {
+ /* Use content size if non-zero, else file size */
+ packet_index.packet_size = packet_index.content_size ? : filestats.st_size * CHAR_BIT;
+ }
+ } else {
+ /* Use file size for packet size */
+ packet_index.content_size = filestats.st_size * CHAR_BIT;
+ /* Use content size if non-zero, else file size */
+ packet_index.packet_size = packet_index.content_size ? : filestats.st_size * CHAR_BIT;
+ }