+static
+struct format ctf_format = {
+ .open_trace = ctf_open_trace,
+ .close_trace = ctf_close_trace,
+};
+
+static
+int ctf_read_event(struct stream_pos *ppos, struct ctf_stream *stream)
+{
+ struct ctf_stream_pos *pos =
+ container_of(ppos, struct ctf_stream_pos, parent);
+ struct ctf_stream_class *stream_class = stream->stream_class;
+ struct ctf_event *event_class;
+ uint64_t id = 0;
+ int ret;
+
+ if (pos->offset == EOF)
+ return EOF;
+
+ /* Read event header */
+ if (stream_class->event_header) {
+ struct definition_integer *integer_definition;
+
+ ret = generic_rw(ppos, &stream_class->event_header->p);
+ if (ret)
+ goto error;
+ /* lookup event id */
+ integer_definition = lookup_integer(&stream_class->event_header->p, "id", FALSE);
+ if (integer_definition) {
+ id = integer_definition->value._unsigned;
+ } else {
+ struct definition_enum *enum_definition;
+
+ enum_definition = lookup_enum(&stream_class->event_header->p, "id", FALSE);
+ if (enum_definition) {
+ id = enum_definition->integer->value._unsigned;
+ }
+ }
+
+ /* lookup timestamp */
+ integer_definition = lookup_integer(&stream_class->event_header->p, "timestamp", FALSE);
+ if (integer_definition) {
+ stream->timestamp = integer_definition->value._unsigned;
+ } else {
+ struct definition *definition;
+
+ definition = lookup_variant(&stream_class->event_header->p, "v");
+ if (definition) {
+ integer_definition = lookup_integer(definition, "id", FALSE);
+ if (integer_definition) {
+ id = integer_definition->value._unsigned;
+ }
+ integer_definition = lookup_integer(definition, "timestamp", FALSE);
+ if (integer_definition) {
+ stream->timestamp = integer_definition->value._unsigned;
+ }
+ }
+ }
+ }
+
+ /* Read stream-declared event context */
+ if (stream_class->event_context) {
+ ret = generic_rw(ppos, &stream_class->event_context->p);
+ if (ret)
+ goto error;
+ }
+
+ if (id >= stream_class->events_by_id->len) {
+ fprintf(stdout, "[error] Event id %" PRIu64 " is outside range.\n", id);
+ return -EINVAL;
+ }
+ event_class = g_ptr_array_index(stream_class->events_by_id, id);
+ if (!event_class) {
+ fprintf(stdout, "[error] Event id %" PRIu64 " is unknown.\n", id);
+ return -EINVAL;
+ }
+
+ /* Read event-declared event context */
+ if (event_class->context) {
+ ret = generic_rw(ppos, &event_class->context->p);
+ if (ret)
+ goto error;
+ }
+
+ /* Read event payload */
+ if (event_class->fields) {
+ ret = generic_rw(ppos, &event_class->fields->p);
+ if (ret)
+ goto error;
+ }
+
+ return 0;
+
+error:
+ fprintf(stdout, "[error] Unexpected end of stream. Either the trace data stream is corrupted or metadata description does not match data layout.\n");
+ return ret;
+}
+
+static
+int ctf_write_event(struct stream_pos *pos, struct ctf_stream *stream)
+{
+ struct ctf_stream_class *stream_class = stream->stream_class;
+ struct ctf_event *event_class;
+ uint64_t id = 0;
+ int len_index;
+ int ret;
+
+ /* print event header */
+ if (stream_class->event_header) {
+ /* lookup event id */
+ len_index = struct_declaration_lookup_field_index(stream_class->event_header_decl,
+ g_quark_from_static_string("id"));
+ if (len_index >= 0) {
+ struct definition_integer *defint;
+ struct definition *field;
+
+ field = struct_definition_get_field_from_index(stream_class->event_header, len_index);
+ assert(field->declaration->id == CTF_TYPE_INTEGER);
+ defint = container_of(field, struct definition_integer, p);
+ assert(defint->declaration->signedness == FALSE);
+ id = defint->value._unsigned; /* set id */
+ }
+
+ ret = generic_rw(pos, &stream_class->event_header->p);
+ if (ret)
+ goto error;
+ }
+
+ /* print stream-declared event context */
+ if (stream_class->event_context) {
+ ret = generic_rw(pos, &stream_class->event_context->p);
+ if (ret)
+ goto error;
+ }
+
+ if (id >= stream_class->events_by_id->len) {
+ fprintf(stdout, "[error] Event id %" PRIu64 " is outside range.\n", id);
+ return -EINVAL;
+ }
+ event_class = g_ptr_array_index(stream_class->events_by_id, id);
+ if (!event_class) {
+ fprintf(stdout, "[error] Event id %" PRIu64 " is unknown.\n", id);
+ return -EINVAL;
+ }
+
+ /* print event-declared event context */
+ if (event_class->context) {
+ ret = generic_rw(pos, &event_class->context->p);
+ if (ret)
+ goto error;
+ }
+
+ /* Read and print event payload */
+ if (event_class->fields) {
+ ret = generic_rw(pos, &event_class->fields->p);
+ if (ret)
+ goto error;
+ }
+
+ return 0;
+
+error:
+ fprintf(stdout, "[error] Unexpected end of stream. Either the trace data stream is corrupted or metadata description does not match data layout.\n");
+ return ret;
+}
+
+void ctf_init_pos(struct ctf_stream_pos *pos, int fd, int open_flags)
+{
+ pos->fd = fd;
+ pos->mmap_offset = 0;
+ pos->packet_size = 0;
+ pos->content_size = 0;
+ pos->content_size_loc = NULL;
+ pos->base = NULL;
+ pos->offset = 0;
+ pos->dummy = false;
+ pos->cur_index = 0;
+ if (fd >= 0)
+ pos->packet_index = g_array_new(FALSE, TRUE,
+ sizeof(struct packet_index));
+ else
+ pos->packet_index = NULL;
+ switch (open_flags & O_ACCMODE) {
+ case O_RDONLY:
+ pos->prot = PROT_READ;
+ pos->flags = MAP_PRIVATE;
+ pos->parent.rw_table = read_dispatch_table;
+ pos->parent.event_cb = ctf_read_event;
+ break;
+ case O_RDWR:
+ pos->prot = PROT_WRITE; /* Write has priority */
+ pos->flags = MAP_SHARED;
+ pos->parent.rw_table = write_dispatch_table;
+ pos->parent.event_cb = ctf_write_event;
+ if (fd >= 0)
+ ctf_move_pos_slow(pos, 0, SEEK_SET); /* position for write */
+ break;
+ default:
+ assert(0);
+ }
+}
+
+void ctf_fini_pos(struct ctf_stream_pos *pos)
+{
+ int ret;
+
+ if (pos->prot == PROT_WRITE && pos->content_size_loc)
+ *pos->content_size_loc = pos->offset;
+ 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));
+ assert(0);
+ }
+ }
+ (void) g_array_free(pos->packet_index, TRUE);
+}
+
+void ctf_move_pos_slow(struct ctf_stream_pos *pos, size_t offset, int whence)
+{
+ int ret;
+ off_t off;
+ struct packet_index *index;
+
+ if (pos->prot == PROT_WRITE && pos->content_size_loc)
+ *pos->content_size_loc = pos->offset;
+
+ 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));
+ assert(0);
+ }
+ pos->base = NULL;
+ }
+
+ /*
+ * The caller should never ask for ctf_move_pos across packets,
+ * except to get exactly at the beginning of the next packet.
+ */
+ if (pos->prot == PROT_WRITE) {
+ switch (whence) {
+ case SEEK_CUR:
+ /* The writer will add padding */
+ assert(pos->offset + offset == pos->packet_size);
+ pos->mmap_offset += WRITE_PACKET_LEN / CHAR_BIT;
+ break;
+ case SEEK_SET:
+ assert(offset == 0); /* only seek supported for now */
+ pos->cur_index = 0;
+ break;
+ default:
+ assert(0);
+ }
+ pos->content_size = -1U; /* Unknown at this point */
+ pos->packet_size = WRITE_PACKET_LEN;
+ off = posix_fallocate(pos->fd, pos->mmap_offset,
+ pos->packet_size / CHAR_BIT);
+ assert(off >= 0);
+ pos->offset = 0;
+ } else {
+ switch (whence) {
+ case SEEK_CUR:
+ /* The reader will expect us to skip padding */
+ assert(pos->offset + offset == pos->content_size);
+ ++pos->cur_index;
+ break;
+ case SEEK_SET:
+ assert(offset == 0); /* only seek supported for now */
+ pos->cur_index = 0;
+ break;
+ default:
+ assert(0);
+ }
+ if (pos->cur_index >= pos->packet_index->len) {
+ pos->offset = EOF;
+ return;
+ }
+ index = &g_array_index(pos->packet_index, struct packet_index,
+ pos->cur_index);
+ pos->mmap_offset = index->offset;
+
+ /* Lookup context/packet size in index */
+ pos->content_size = index->content_size;
+ pos->packet_size = index->packet_size;
+ pos->offset = index->data_offset;
+ }
+ /* map new base. Need mapping length from header. */
+ pos->base = mmap(NULL, pos->packet_size / CHAR_BIT, pos->prot,
+ pos->flags, pos->fd, pos->mmap_offset);
+ if (pos->base == MAP_FAILED) {
+ fprintf(stdout, "[error] mmap error %s.\n",
+ strerror(errno));
+ assert(0);
+ }
+}
+
+static
+int packet_metadata(struct ctf_trace *td, FILE *fp)
+{
+ uint32_t magic;
+ size_t len;
+ int ret = 0;
+
+ len = fread(&magic, sizeof(magic), 1, fp);
+ if (len != 1) {
+ goto end;
+ }
+ if (magic == TSDL_MAGIC) {
+ ret = 1;
+ td->byte_order = BYTE_ORDER;
+ } else if (magic == GUINT32_SWAP_LE_BE(TSDL_MAGIC)) {
+ ret = 1;
+ td->byte_order = (BYTE_ORDER == BIG_ENDIAN) ?
+ LITTLE_ENDIAN : BIG_ENDIAN;
+ }
+ CTF_TRACE_SET_FIELD(td, byte_order);
+end:
+ rewind(fp);
+ return ret;
+}
+
+static
+int ctf_open_trace_metadata_packet_read(struct ctf_trace *td, FILE *in,
+ FILE *out)
+{
+ struct metadata_packet_header header;
+ size_t readlen, writelen, toread;
+ char buf[4096];
+ int ret = 0;
+
+ readlen = fread(&header, header_sizeof(header), 1, in);
+ if (readlen < 1)
+ return -EINVAL;
+
+ if (td->byte_order != BYTE_ORDER) {
+ header.magic = GUINT32_SWAP_LE_BE(header.magic);
+ header.checksum = GUINT32_SWAP_LE_BE(header.checksum);
+ header.content_size = GUINT32_SWAP_LE_BE(header.content_size);
+ header.packet_size = GUINT32_SWAP_LE_BE(header.packet_size);
+ }
+ if (header.checksum)
+ fprintf(stdout, "[warning] checksum verification not supported yet.\n");
+ if (header.compression_scheme) {
+ fprintf(stdout, "[error] compression (%u) not supported yet.\n",
+ header.compression_scheme);
+ return -EINVAL;
+ }
+ if (header.encryption_scheme) {
+ fprintf(stdout, "[error] encryption (%u) not supported yet.\n",
+ header.encryption_scheme);
+ return -EINVAL;
+ }
+ if (header.checksum_scheme) {
+ fprintf(stdout, "[error] checksum (%u) not supported yet.\n",
+ header.checksum_scheme);
+ return -EINVAL;
+ }
+ if (!CTF_TRACE_FIELD_IS_SET(td, uuid)) {
+ memcpy(td->uuid, header.uuid, sizeof(header.uuid));
+ CTF_TRACE_SET_FIELD(td, uuid);
+ } else {
+ if (uuid_compare(header.uuid, td->uuid))
+ return -EINVAL;
+ }
+
+ toread = header.content_size / CHAR_BIT;
+
+ for (;;) {
+ readlen = fread(buf, sizeof(char), min(sizeof(buf), toread), in);
+ if (ferror(in)) {
+ ret = -EINVAL;
+ break;
+ }
+ printf("read %s\n", buf);
+ writelen = fwrite(buf, sizeof(char), readlen, out);
+ if (writelen < readlen) {
+ ret = -EIO;
+ break;
+ }
+ if (ferror(out)) {
+ ret = -EINVAL;
+ break;
+ }
+ toread -= readlen;
+ if (!toread) {
+ ret = 0; /* continue reading next packet */
+ break;
+ }
+ }
+ return ret;
+}
+
+static
+int ctf_open_trace_metadata_stream_read(struct ctf_trace *td, FILE **fp,
+ char **buf)
+{
+ FILE *in, *out;
+ size_t size;
+ int ret;
+
+ in = *fp;
+ 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, size, "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)