int ctf_fs_metadata_set_trace(struct ctf_fs_trace *ctf_fs_trace,
struct ctf_fs_metadata_config *config)
{
int ret = 0;
struct ctf_fs_file *file = NULL;
struct ctf_metadata_decoder *metadata_decoder = NULL;
struct ctf_metadata_decoder_config decoder_config = {
.clock_class_offset_s = config ? config->clock_class_offset_s : 0,
.clock_class_offset_ns = config ? config->clock_class_offset_ns : 0,
};
file = get_file(ctf_fs_trace->path->str);
if (!file) {
BT_LOGE("Cannot create metadata file object");
ret = -1;
goto end;
}
metadata_decoder = ctf_metadata_decoder_create(
config ? &decoder_config : NULL,
ctf_fs_trace->name->str);
if (!metadata_decoder) {
BT_LOGE("Cannot create metadata decoder object");
ret = -1;
goto end;
}
ret = ctf_metadata_decoder_decode(metadata_decoder, file->fp);
if (ret) {
BT_LOGE("Cannot decode metadata file");
goto end;
}
ctf_fs_trace->metadata->trace = ctf_metadata_decoder_get_trace(
metadata_decoder);
assert(ctf_fs_trace->metadata->trace);
end:
ctf_fs_file_destroy(file);
ctf_metadata_decoder_destroy(metadata_decoder);
return ret;
}
int ctf_fs_metadata_init(struct ctf_fs_metadata *metadata)
{
/* Nothing to initialize for the moment. */
return 0;
}
void ctf_fs_metadata_fini(struct ctf_fs_metadata *metadata)
{
if (metadata->text) {
free(metadata->text);
}
if (metadata->trace) {
BT_PUT(metadata->trace);
}
}
BT_HIDDEN
void lttng_live_metadata_fini(struct lttng_live_trace *trace)
{
struct lttng_live_metadata *metadata = trace->metadata;
if (!metadata) {
return;
}
ctf_metadata_decoder_destroy(metadata->decoder);
trace->metadata = NULL;
g_free(metadata);
}
BT_HIDDEN
int lttng_live_metadata_create_stream(struct lttng_live_session *session,
uint64_t ctf_trace_id,
uint64_t stream_id,
const char *trace_name)
{
struct lttng_live_component *lttng_live =
session->lttng_live_msg_iter->lttng_live_comp;
struct lttng_live_metadata *metadata = NULL;
struct lttng_live_trace *trace;
const char *match;
metadata = g_new0(struct lttng_live_metadata, 1);
if (!metadata) {
return -1;
}
metadata->stream_id = stream_id;
match = strstr(trace_name, session->session_name->str);
if (!match) {
goto error;
}
metadata->decoder = ctf_metadata_decoder_create(
lttng_live->self_comp, NULL);
if (!metadata->decoder) {
goto error;
}
trace = lttng_live_borrow_trace(session, ctf_trace_id);
if (!trace) {
goto error;
}
metadata->trace = trace;
trace->metadata = metadata;
return 0;
error:
ctf_metadata_decoder_destroy(metadata->decoder);
g_free(metadata);
return -1;
}
BT_HIDDEN
struct ctf_metadata_decoder *ctf_metadata_decoder_create(
const struct ctf_metadata_decoder_config *config,
const char *name)
{
struct ctf_metadata_decoder *mdec =
g_new0(struct ctf_metadata_decoder, 1);
struct ctf_metadata_decoder_config default_config = {
.clock_class_offset_s = 0,
.clock_class_offset_ns = 0,
};
if (!config) {
config = &default_config;
}
BT_LOGD("Creating CTF metadata decoder: "
"clock-class-offset-s=%" PRId64 ", "
"clock-class-offset-ns=%" PRId64 ", name=\"%s\"",
config->clock_class_offset_s, config->clock_class_offset_ns,
name);
if (!mdec) {
BT_LOGE_STR("Failed to allocate one CTF metadata decoder.");
goto end;
}
mdec->config = *config;
mdec->visitor = ctf_visitor_generate_ir_create(config, name);
if (!mdec->visitor) {
BT_LOGE("Failed to create a CTF IR metadata AST visitor: "
"mdec-addr=%p", mdec);
ctf_metadata_decoder_destroy(mdec);
mdec = NULL;
goto end;
}
BT_LOGD("Creating CTF metadata decoder: "
"clock-class-offset-s=%" PRId64 ", "
"clock-class-offset-ns=%" PRId64 ", "
"name=\"%s\", addr=%p",
config->clock_class_offset_s, config->clock_class_offset_ns,
name, mdec);
end:
return mdec;
}
BT_HIDDEN
void ctf_metadata_decoder_destroy(struct ctf_metadata_decoder *mdec)
{
if (!mdec) {
return;
}
BT_LOGD("Destroying CTF metadata decoder: addr=%p", mdec);
ctf_visitor_generate_ir_destroy(mdec->visitor);
g_free(mdec);
}
BT_HIDDEN
enum ctf_metadata_decoder_status ctf_metadata_decoder_decode(
struct ctf_metadata_decoder *mdec, FILE *fp)
{
enum ctf_metadata_decoder_status status =
CTF_METADATA_DECODER_STATUS_OK;
int ret;
struct ctf_scanner *scanner = NULL;
char *buf = NULL;
bool close_fp = false;
assert(mdec);
if (ctf_metadata_decoder_is_packetized(fp, &mdec->bo)) {
BT_LOGD("Metadata stream is packetized: mdec-addr=%p", mdec);
ret = ctf_metadata_decoder_packetized_file_stream_to_buf_with_mdec(
mdec, fp, &buf, mdec->bo);
if (ret) {
BT_LOGE("Cannot decode packetized metadata packets to metadata text: "
"mdec-addr=%p, ret=%d", mdec, ret);
status = CTF_METADATA_DECODER_STATUS_ERROR;
goto end;
}
if (strlen(buf) == 0) {
/* An empty metadata packet is OK. */
goto end;
}
/* Convert the real file pointer to a memory file pointer */
fp = bt_fmemopen(buf, strlen(buf), "rb");
close_fp = true;
if (!fp) {
BT_LOGE("Cannot memory-open metadata buffer: %s: "
"mdec-addr=%p", strerror(errno), mdec);
status = CTF_METADATA_DECODER_STATUS_ERROR;
goto end;
}
} else {
unsigned int major, minor;
ssize_t nr_items;
const long init_pos = ftell(fp);
BT_LOGD("Metadata stream is plain text: mdec-addr=%p", mdec);
if (init_pos < 0) {
BT_LOGE_ERRNO("Failed to get current file position", ".");
status = CTF_METADATA_DECODER_STATUS_ERROR;
goto end;
}
/* Check text-only metadata header and version */
nr_items = fscanf(fp, "/* CTF %10u.%10u", &major, &minor);
if (nr_items < 2) {
BT_LOGW("Missing \"/* CTF major.minor\" signature in plain text metadata file stream: "
"mdec-addr=%p", mdec);
}
BT_LOGD("Found metadata stream version in signature: version=%u.%u", major, minor);
if (!is_version_valid(major, minor)) {
BT_LOGE("Invalid metadata version found in plain text signature: "
"version=%u.%u, mdec-addr=%p", major, minor,
mdec);
status = CTF_METADATA_DECODER_STATUS_INVAL_VERSION;
goto end;
}
if (fseek(fp, init_pos, SEEK_SET)) {
BT_LOGE("Cannot seek metadata file stream to initial position: %s: "
"mdec-addr=%p", strerror(errno), mdec);
status = CTF_METADATA_DECODER_STATUS_ERROR;
goto end;
}
}
if (BT_LOG_ON_VERBOSE) {
yydebug = 1;
}
/* Allocate a scanner and append the metadata text content */
scanner = ctf_scanner_alloc();
if (!scanner) {
BT_LOGE("Cannot allocate a metadata lexical scanner: "
"mdec-addr=%p", mdec);
status = CTF_METADATA_DECODER_STATUS_ERROR;
goto end;
}
assert(fp);
ret = ctf_scanner_append_ast(scanner, fp);
if (ret) {
BT_LOGE("Cannot create the metadata AST out of the metadata text: "
"mdec-addr=%p", mdec);
status = CTF_METADATA_DECODER_STATUS_INCOMPLETE;
goto end;
}
ret = ctf_visitor_semantic_check(0, &scanner->ast->root);
if (ret) {
BT_LOGE("Validation of the metadata semantics failed: "
"mdec-addr=%p", mdec);
status = CTF_METADATA_DECODER_STATUS_ERROR;
goto end;
}
ret = ctf_visitor_generate_ir_visit_node(mdec->visitor,
&scanner->ast->root);
switch (ret) {
case 0:
/* Success */
break;
case -EINCOMPLETE:
BT_LOGD("While visiting metadata AST: incomplete data: "
"mdec-addr=%p", mdec);
status = CTF_METADATA_DECODER_STATUS_INCOMPLETE;
goto end;
default:
BT_LOGE("Failed to visit AST node to create CTF IR objects: "
"mdec-addr=%p, ret=%d", mdec, ret);
status = CTF_METADATA_DECODER_STATUS_IR_VISITOR_ERROR;
goto end;
}
end:
if (scanner) {
ctf_scanner_free(scanner);
}
yydebug = 0;
if (fp && close_fp) {
if (fclose(fp)) {
BT_LOGE("Cannot close metadata file stream: "
"mdec-addr=%p", mdec);
}
}
if (buf) {
free(buf);
}
return status;
}
BT_HIDDEN
struct bt_trace *ctf_metadata_decoder_get_trace(
struct ctf_metadata_decoder *mdec)
{
return ctf_visitor_generate_ir_get_trace(mdec->visitor);
}
