--- /dev/null
+#ifndef _LTTNG_UST_EVENTS_INTERNAL_H
+#define _LTTNG_UST_EVENTS_INTERNAL_H
+
+/*
+ * ust-events-internal.h
+ *
+ * Copyright 2019 (c) - Francis Deslauriers <francis.deslauriers@efficios.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <stdint.h>
+
+#include <urcu/list.h>
+#include <urcu/hlist.h>
+
+#include <helper.h>
+#include <lttng/ust-events.h>
+
+struct lttng_event_enabler {
+ struct lttng_enabler base;
+ struct cds_list_head node; /* per-session list of enablers */
+ struct lttng_channel *chan;
+ /*
+ * Unused, but kept around to make it explicit that the tracer can do
+ * it.
+ */
+ struct lttng_ctx *ctx;
+};
+
+struct lttng_trigger_enabler {
+ struct lttng_enabler base;
+ uint64_t id;
+ uint64_t error_counter_index;
+ struct cds_list_head node; /* per-app list of trigger enablers */
+ struct cds_list_head capture_bytecode_head;
+ struct lttng_trigger_group *group; /* weak ref */
+ uint64_t num_captures;
+};
+
+enum lttng_ust_bytecode_node_type{
+ LTTNG_UST_BYTECODE_NODE_TYPE_FILTER,
+ LTTNG_UST_BYTECODE_NODE_TYPE_CAPTURE,
+};
+
+
+struct lttng_ust_bytecode_node {
+ enum lttng_ust_bytecode_node_type type;
+ struct cds_list_head node;
+ struct lttng_enabler *enabler;
+ struct {
+ uint32_t len;
+ uint32_t reloc_offset;
+ uint64_t seqnum;
+ char data[];
+ } bc;
+};
+
+struct lttng_ust_excluder_node {
+ struct cds_list_head node;
+ struct lttng_enabler *enabler;
+ /*
+ * struct lttng_ust_event_exclusion had variable sized array,
+ * must be last field.
+ */
+ struct lttng_ust_event_exclusion excluder;
+};
+
+static inline
+struct lttng_enabler *lttng_event_enabler_as_enabler(
+ struct lttng_event_enabler *event_enabler)
+{
+ return &event_enabler->base;
+}
+
+static inline
+struct lttng_enabler *lttng_trigger_enabler_as_enabler(
+ struct lttng_trigger_enabler *trigger_enabler)
+{
+ return &trigger_enabler->base;
+}
+
+/*
+ * Allocate and initialize a `struct lttng_event_enabler` object.
+ *
+ * On success, returns a `struct lttng_event_enabler`,
+ * On memory error, returns NULL.
+ */
+LTTNG_HIDDEN
+struct lttng_event_enabler *lttng_event_enabler_create(
+ enum lttng_enabler_format_type format_type,
+ struct lttng_ust_event *event_param,
+ struct lttng_channel *chan);
+
+/*
+ * Destroy a `struct lttng_event_enabler` object.
+ */
+LTTNG_HIDDEN
+void lttng_event_enabler_destroy(struct lttng_event_enabler *enabler);
+
+/*
+ * Enable a `struct lttng_event_enabler` object and all events related to this
+ * enabler.
+ */
+LTTNG_HIDDEN
+int lttng_event_enabler_enable(struct lttng_event_enabler *enabler);
+
+/*
+ * Disable a `struct lttng_event_enabler` object and all events related to this
+ * enabler.
+ */
+LTTNG_HIDDEN
+int lttng_event_enabler_disable(struct lttng_event_enabler *enabler);
+
+/*
+ * Attach filter bytecode program to `struct lttng_event_enabler` and all
+ * events related to this enabler.
+ */
+LTTNG_HIDDEN
+int lttng_event_enabler_attach_filter_bytecode(
+ struct lttng_event_enabler *enabler,
+ struct lttng_ust_bytecode_node *bytecode);
+
+/*
+ * Attach an application context to an event enabler.
+ *
+ * Not implemented.
+ */
+LTTNG_HIDDEN
+int lttng_event_enabler_attach_context(struct lttng_event_enabler *enabler,
+ struct lttng_ust_context *ctx);
+
+/*
+ * Attach exclusion list to `struct lttng_event_enabler` and all
+ * events related to this enabler.
+ */
+LTTNG_HIDDEN
+int lttng_event_enabler_attach_exclusion(struct lttng_event_enabler *enabler,
+ struct lttng_ust_excluder_node *excluder);
+
+/*
+ * Synchronize bytecodes for the enabler and the instance (event or trigger).
+ *
+ * This function goes over all bytecode programs of the enabler (event or
+ * trigger enabler) to ensure each is linked to the provided instance.
+ */
+LTTNG_HIDDEN
+void lttng_enabler_link_bytecode(const struct lttng_event_desc *event_desc,
+ struct lttng_ctx **ctx,
+ struct cds_list_head *instance_bytecode_runtime_head,
+ struct cds_list_head *enabler_bytecode_runtime_head);
+
+/*
+ * Allocate and initialize a `struct lttng_trigger_group` object.
+ *
+ * On success, returns a `struct lttng_triggre_group`,
+ * on memory error, returns NULL.
+ */
+LTTNG_HIDDEN
+struct lttng_trigger_group *lttng_trigger_group_create(void);
+
+/*
+ * Destroy a `struct lttng_trigger_group` object.
+ */
+LTTNG_HIDDEN
+void lttng_trigger_group_destroy(
+ struct lttng_trigger_group *trigger_group);
+
+/*
+ * Allocate and initialize a `struct lttng_trigger_enabler` object.
+ *
+ * On success, returns a `struct lttng_trigger_enabler`,
+ * On memory error, returns NULL.
+ */
+LTTNG_HIDDEN
+struct lttng_trigger_enabler *lttng_trigger_enabler_create(
+ struct lttng_trigger_group *trigger_group,
+ enum lttng_enabler_format_type format_type,
+ struct lttng_ust_trigger *trigger_param);
+
+/*
+ * Destroy a `struct lttng_trigger_enabler` object.
+ */
+LTTNG_HIDDEN
+void lttng_trigger_enabler_destroy(struct lttng_trigger_enabler *trigger_enabler);
+
+/*
+ * Enable a `struct lttng_trigger_enabler` object and all triggers related to
+ * this enabler.
+ */
+LTTNG_HIDDEN
+int lttng_trigger_enabler_enable(struct lttng_trigger_enabler *trigger_enabler);
+
+/*
+ * Disable a `struct lttng_trigger_enabler` object and all triggers related to
+ * this enabler.
+ */
+LTTNG_HIDDEN
+int lttng_trigger_enabler_disable(struct lttng_trigger_enabler *trigger_enabler);
+
+/*
+ * Attach filter bytecode program to `struct lttng_trigger_enabler` and all
+ * triggers related to this enabler.
+ */
+LTTNG_HIDDEN
+int lttng_trigger_enabler_attach_filter_bytecode(
+ struct lttng_trigger_enabler *trigger_enabler,
+ struct lttng_ust_bytecode_node *bytecode);
+
+/*
+ * Attach capture bytecode program to `struct lttng_trigger_enabler` and all
+ * triggers related to this enabler.
+ */
+LTTNG_HIDDEN
+int lttng_trigger_enabler_attach_capture_bytecode(
+ struct lttng_trigger_enabler *trigger_enabler,
+ struct lttng_ust_bytecode_node *bytecode);
+
+/*
+ * Attach exclusion list to `struct lttng_trigger_enabler` and all
+ * triggers related to this enabler.
+ */
+LTTNG_HIDDEN
+int lttng_trigger_enabler_attach_exclusion(
+ struct lttng_trigger_enabler *trigger_enabler,
+ struct lttng_ust_excluder_node *excluder);
+
+LTTNG_HIDDEN
+void lttng_free_trigger_filter_runtime(struct lttng_trigger *trigger);
+
+/*
+ * Connect the probe on all enablers matching this event description.
+ * Called on library load.
+ */
+LTTNG_HIDDEN
+int lttng_fix_pending_triggers(void);
+
+#endif /* _LTTNG_UST_EVENTS_INTERNAL_H */
projects / deliverable / lttng-ust.git / blobdiff