include/lttng/condition/event-rule-internal.h

   1 /*
   2  * Copyright (C) 2019 Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
   3  *
   4  * SPDX-License-Identifier: LGPL-2.1-only
   5  *
   6  */
   7
   8 #ifndef LTTNG_CONDITION_ON_EVENT_INTERNAL_H
   9 #define LTTNG_CONDITION_ON_EVENT_INTERNAL_H
  10
  11 #include <lttng/condition/condition-internal.h>
  12 #include <common/buffer-view.h>
  13 #include <common/macros.h>
  14 #include <lttng/condition/evaluation-internal.h>
  15 #include <common/dynamic-array.h>
  16 #include <lttng/event-field-value.h>
  17
  18 struct lttng_capture_descriptor {
  19         struct lttng_event_expr *event_expression;
  20         struct lttng_bytecode *bytecode;
  21 };
  22
  23 struct lttng_condition_on_event {
  24         struct lttng_condition parent;
  25         struct lttng_event_rule *rule;
  26
  27         /* Array of `struct lttng_capture_descriptor *`. */
  28         struct lttng_dynamic_pointer_array capture_descriptors;
  29 };
  30
  31 struct lttng_evaluation_on_event {
  32         struct lttng_evaluation parent;
  33         char *name;
  34
  35         /* MessagePack-encoded captured event field values. */
  36         struct lttng_dynamic_buffer capture_payload;
  37
  38         /*
  39          * The content of this array event field value is the decoded
  40          * version of `capture_payload` above.
  41          *
  42          * This is a cache: it's not serialized/deserialized in
  43          * communications from/to the library and the session daemon.
  44          */
  45         struct lttng_event_field_value *captured_values;
  46 };
  47
  48 struct lttng_evaluation_on_event_comm {
  49         /* Includes the null terminator. */
  50         uint32_t trigger_name_length;
  51         /* Trigger name. */
  52         char payload[];
  53 } LTTNG_PACKED;
  54
  55 LTTNG_HIDDEN
  56 ssize_t lttng_condition_on_event_create_from_payload(
  57                 struct lttng_payload_view *view,
  58                 struct lttng_condition **condition);
  59
  60 LTTNG_HIDDEN
  61 enum lttng_condition_status
  62 lttng_condition_on_event_borrow_rule_mutable(
  63                 const struct lttng_condition *condition,
  64                 struct lttng_event_rule **rule);
  65
  66 LTTNG_HIDDEN
  67 struct lttng_evaluation *lttng_evaluation_on_event_create(
  68                 const struct lttng_condition_on_event *condition,
  69                 const char* trigger_name,
  70                 const char *capture_payload, size_t capture_payload_size,
  71                 bool decode_capture_payload);
  72
  73 LTTNG_HIDDEN
  74 ssize_t lttng_evaluation_on_event_create_from_payload(
  75                 const struct lttng_condition_on_event *condition,
  76                 struct lttng_payload_view *view,
  77                 struct lttng_evaluation **_evaluation);
  78
  79 LTTNG_HIDDEN
  80 enum lttng_error_code
  81 lttng_condition_on_event_generate_capture_descriptor_bytecode(
  82                 struct lttng_condition *condition);
  83
  84 LTTNG_HIDDEN
  85 const struct lttng_bytecode *
  86 lttng_condition_on_event_get_capture_bytecode_at_index(
  87                 const struct lttng_condition *condition, unsigned int index);
  88
  89 #endif /* LTTNG_CONDITION_ON_EVENT_INTERNAL_H */