return ret;
}
+static ssize_t lttng_event_context_app_populate_from_payload(
+ const struct lttng_payload_view *view,
+ struct lttng_event_context *event_ctx)
+{
+ ssize_t ret, offset = 0;
+ const struct lttng_event_context_app_comm *comm;
+ char *provider_name = NULL, *context_name = NULL;
+ size_t provider_name_len, context_name_len;
+ const struct lttng_buffer_view comm_view = lttng_buffer_view_from_view(
+ &view->buffer, offset, sizeof(*comm));
+
+ assert(event_ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT);
+
+ if (!lttng_buffer_view_is_valid(&comm_view)) {
+ ret = -1;
+ goto end;
+ }
+
+ comm = (typeof(comm)) comm_view.data;
+ offset += sizeof(*comm);
+
+ provider_name_len = comm->provider_name_len;
+ context_name_len = comm->ctx_name_len;
+
+ if (provider_name_len == 0 || context_name_len == 0) {
+ /*
+ * Application provider and context names MUST
+ * be provided.
+ */
+ ret = -1;
+ goto end;
+ }
+
+ {
+ const char *name;
+ const struct lttng_buffer_view provider_name_view =
+ lttng_buffer_view_from_view(&view->buffer,
+ offset,
+ provider_name_len);
+
+ if (!lttng_buffer_view_is_valid(&provider_name_view)) {
+ ret = -1;
+ goto end;
+ }
+
+ name = provider_name_view.data;
+
+ if (!lttng_buffer_view_contains_string(&provider_name_view,
+ name, provider_name_len)) {
+ ret = -1;
+ goto end;
+ }
+
+ provider_name = lttng_strndup(name, provider_name_len);
+ if (!provider_name) {
+ ret = -1;
+ goto end;
+ }
+
+ offset += provider_name_len;
+ }
+
+ {
+ const char *name;
+ const struct lttng_buffer_view context_name_view =
+ lttng_buffer_view_from_view(
+ &view->buffer, offset,
+ context_name_len);
+
+ if (!lttng_buffer_view_is_valid(&context_name_view)) {
+ ret = -1;
+ goto end;
+ }
+
+ name = context_name_view.data;
+
+ if (!lttng_buffer_view_contains_string(&context_name_view, name,
+ context_name_len)) {
+ ret = -1;
+ goto end;
+ }
+
+ context_name = lttng_strndup(name, context_name_len);
+ if (!context_name) {
+ ret = -1;
+ goto end;
+ }
+
+ offset += context_name_len;
+ }
+
+ /* Transfer ownership of the strings */
+ event_ctx->u.app_ctx.provider_name = provider_name;
+ event_ctx->u.app_ctx.ctx_name = context_name;
+ provider_name = NULL;
+ context_name = NULL;
+
+ ret = offset;
+end:
+ free(provider_name);
+ free(context_name);
+
+ return ret;
+}
+
+static ssize_t lttng_event_context_perf_counter_populate_from_payload(
+ const struct lttng_payload_view *view,
+ struct lttng_event_context *event_ctx)
+{
+ ssize_t ret, offset = 0;
+ const struct lttng_event_context_perf_counter_comm *comm;
+ size_t name_len;
+ const struct lttng_buffer_view comm_view = lttng_buffer_view_from_view(
+ &view->buffer, offset, sizeof(*comm));
+
+ assert(event_ctx->ctx == LTTNG_EVENT_CONTEXT_PERF_COUNTER ||
+ event_ctx->ctx ==
+ LTTNG_EVENT_CONTEXT_PERF_THREAD_COUNTER ||
+ event_ctx->ctx == LTTNG_EVENT_CONTEXT_PERF_CPU_COUNTER);
+
+ if (!lttng_buffer_view_is_valid(&comm_view)) {
+ ret = -1;
+ goto end;
+ }
+
+ comm = (typeof(comm)) comm_view.data;
+ offset += sizeof(*comm);
+
+ name_len = comm->name_len;
+
+ {
+ const char *name;
+ const struct lttng_buffer_view provider_name_view =
+ lttng_buffer_view_from_view(
+ &view->buffer, offset,
+ name_len);
+
+ if (!lttng_buffer_view_is_valid(&provider_name_view)) {
+ ret = -1;
+ goto end;
+ }
+
+ name = provider_name_view.data;
+
+ if (!lttng_buffer_view_contains_string(
+ &provider_name_view, name, name_len)) {
+ ret = -1;
+ goto end;
+ }
+
+ lttng_strncpy(event_ctx->u.perf_counter.name, name, name_len);
+ offset += name_len;
+ }
+
+ event_ctx->u.perf_counter.config = comm->config;
+ event_ctx->u.perf_counter.type = comm->type;
+
+ ret = offset;
+
+end:
+ return ret;
+}
+
+ssize_t lttng_event_context_create_from_payload(
+ struct lttng_payload_view *view,
+ struct lttng_event_context **event_ctx)
+{
+ ssize_t ret, offset = 0;
+ const struct lttng_event_context_comm *comm;
+ struct lttng_event_context *local_context = NULL;
+ struct lttng_buffer_view comm_view = lttng_buffer_view_from_view(
+ &view->buffer, offset, sizeof(*comm));
+
+ assert(event_ctx);
+ assert(view);
+
+ if (!lttng_buffer_view_is_valid(&comm_view)) {
+ ret = -1;
+ goto end;
+ }
+
+ comm = (typeof(comm)) comm_view.data;
+ offset += sizeof(*comm);
+
+ local_context = (struct lttng_event_context *)
+ zmalloc(sizeof(*local_context));
+ if (!local_context) {
+ ret = -1;
+ goto end;
+ }
+
+ local_context->ctx = (lttng_event_context_type) comm->type;
+
+ {
+ struct lttng_payload_view subtype_view =
+ lttng_payload_view_from_view(view, offset, -1);
+
+ switch (local_context->ctx) {
+ case LTTNG_EVENT_CONTEXT_APP_CONTEXT:
+ ret = lttng_event_context_app_populate_from_payload(
+ &subtype_view, local_context);
+ break;
+ case LTTNG_EVENT_CONTEXT_PERF_COUNTER:
+ case LTTNG_EVENT_CONTEXT_PERF_THREAD_COUNTER:
+ case LTTNG_EVENT_CONTEXT_PERF_CPU_COUNTER:
+ ret = lttng_event_context_perf_counter_populate_from_payload(
+ &subtype_view, local_context);
+ break;
+ default:
+ /* Nothing else to deserialize. */
+ ret = 0;
+ break;
+ }
+ }
+
+ if (ret < 0) {
+ goto end;
+ }
+
+ offset += ret;
+
+ *event_ctx = local_context;
+ local_context = NULL;
+ ret = offset;
+
+end:
+ free(local_context);
+ return ret;
+}
+
+static int lttng_event_context_app_serialize(
+ struct lttng_event_context *context,
+ struct lttng_payload *payload)
+{
+ int ret;
+ struct lttng_event_context_app_comm comm = { 0 };
+ size_t provider_len, ctx_len;
+ const char *provider_name;
+ const char *ctx_name;
+
+ assert(payload);
+ assert(context);
+ assert(context->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT);
+
+ provider_name = context->u.app_ctx.provider_name;
+ ctx_name = context->u.app_ctx.ctx_name;
+
+ if (!provider_name || !ctx_name) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+
+ provider_len = strlen(provider_name);
+ if (provider_len == 0) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+
+ /* Include the null terminator. */
+ comm.provider_name_len = provider_len + 1;
+
+ ctx_len = strlen(ctx_name);
+ if (ctx_len == 0) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+
+ /* Include the null terminator. */
+ comm.ctx_name_len = ctx_len + 1;
+
+ /* Header */
+ ret = lttng_dynamic_buffer_append(&payload->buffer, &comm,
+ sizeof(comm));
+ if (ret) {
+ ret = -1;
+ goto end;
+ }
+
+ ret = lttng_dynamic_buffer_append(&payload->buffer, provider_name,
+ provider_len);
+ if (ret) {
+ ret = -1;
+ goto end;
+ }
+
+ ret = lttng_dynamic_buffer_append(&payload->buffer, ctx_name,
+ ctx_len);
+ if (ret) {
+ ret = -1;
+ goto end;
+ }
+
+end:
+ return ret;
+}
+
+static int lttng_event_context_perf_counter_serialize(
+ struct lttng_event_perf_counter_ctx *context,
+ struct lttng_payload *payload)
+{
+ int ret;
+ struct lttng_event_context_perf_counter_comm comm = { 0 };
+
+ assert(payload);
+ assert(context);
+
+ comm.config = context->config;
+ comm.type = context->type;
+ comm.name_len = lttng_strnlen(context->name, LTTNG_SYMBOL_NAME_LEN);
+
+ if (comm.name_len == LTTNG_SYMBOL_NAME_LEN) {
+ ret = -1;
+ goto end;
+ }
+
+ /* Include the null terminator. */
+ comm.name_len += 1;
+
+ /* Header */
+ ret = lttng_dynamic_buffer_append(&payload->buffer, &comm,
+ sizeof(comm));
+ if (ret) {
+ ret = -1;
+ goto end;
+ }
+
+ ret = lttng_dynamic_buffer_append(&payload->buffer, context->name,
+ comm.name_len);
+ if (ret) {
+ ret = -1;
+ goto end;
+ }
+
+end:
+ return ret;
+}
+
+int lttng_event_context_serialize(struct lttng_event_context *context,
+ struct lttng_payload *payload)
+{
+ int ret;
+ struct lttng_event_context_comm context_comm = { 0 };
+
+ assert(context);
+ assert(payload);
+
+ context_comm.type = (uint32_t) context->ctx;
+
+ /* Header */
+ ret = lttng_dynamic_buffer_append(
+ &payload->buffer, &context_comm, sizeof(context_comm));
+ if (ret) {
+ goto end;
+ }
+
+ switch (context->ctx) {
+ case LTTNG_EVENT_CONTEXT_APP_CONTEXT:
+ ret = lttng_event_context_app_serialize(context, payload);
+ break;
+ case LTTNG_EVENT_CONTEXT_PERF_COUNTER:
+ case LTTNG_EVENT_CONTEXT_PERF_THREAD_COUNTER:
+ case LTTNG_EVENT_CONTEXT_PERF_CPU_COUNTER:
+ ret = lttng_event_context_perf_counter_serialize(
+ &context->u.perf_counter, payload);
+ break;
+ default:
+ /* Nothing else to serialize. */
+ break;
+ }
+
+ if (ret) {
+ goto end;
+ }
+
+end:
+ return ret;
+}
+
+void lttng_event_context_destroy(struct lttng_event_context *context)
+{
+ if (!context) {
+ return;
+ }
+
+ if (context->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) {
+ free(context->u.app_ctx.provider_name);
+ free(context->u.app_ctx.ctx_name);
+ }
+
+ free(context);
+}
+
static enum lttng_error_code compute_flattened_size(
struct lttng_dynamic_pointer_array *events, size_t *size)
{
projects / lttng-tools.git / blobdiff