include/lttng/condition/on-event-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 <common/optional.h>
  15 #include <lttng/condition/evaluation-internal.h>
  16 #include <common/dynamic-array.h>
  17 #include <lttng/event-field-value.h>
  18
  19 struct lttng_capture_descriptor {
  20         struct lttng_event_expr *event_expression;
  21         struct lttng_bytecode *bytecode;
  22 };
  23
  24 struct lttng_condition_on_event {
  25         struct lttng_condition parent;
  26         struct lttng_event_rule *rule;
  27
  28         /*
  29          * Internal use only.
  30          * Error accounting counter index.
  31          */
  32         LTTNG_OPTIONAL(uint64_t) error_counter_index;
  33
  34         /* Array of `struct lttng_capture_descriptor *`. */
  35         struct lttng_dynamic_pointer_array capture_descriptors;
  36 };
  37
  38 struct lttng_evaluation_on_event {
  39         struct lttng_evaluation parent;
  40
  41         /* MessagePack-encoded captured event field values. */
  42         struct lttng_dynamic_buffer capture_payload;
  43
  44         /*
  45          * The content of this array event field value is the decoded
  46          * version of `capture_payload` above.
  47          *
  48          * This is a cache: it's not serialized/deserialized in
  49          * communications from/to the library and the session daemon.
  50          */
  51         struct lttng_event_field_value *captured_values;
  52 };
  53
  54 LTTNG_HIDDEN
  55 ssize_t lttng_condition_on_event_create_from_payload(
  56                 struct lttng_payload_view *view,
  57                 struct lttng_condition **condition);
  58
  59 LTTNG_HIDDEN
  60 enum lttng_condition_status
  61 lttng_condition_on_event_borrow_rule_mutable(
  62                 const struct lttng_condition *condition,
  63                 struct lttng_event_rule **rule);
  64
  65 LTTNG_HIDDEN
  66 void lttng_condition_on_event_set_error_counter_index(
  67                 struct lttng_condition *condition, uint64_t error_counter_index);
  68
  69 LTTNG_HIDDEN
  70 uint64_t lttng_condition_on_event_get_error_counter_index(
  71                 const struct lttng_condition *condition);
  72
  73 LTTNG_HIDDEN
  74 struct lttng_evaluation *lttng_evaluation_on_event_create(
  75                 const struct lttng_condition_on_event *condition,
  76                 const char *capture_payload, size_t capture_payload_size,
  77                 bool decode_capture_payload);
  78
  79 LTTNG_HIDDEN
  80 ssize_t lttng_evaluation_on_event_create_from_payload(
  81                 const struct lttng_condition_on_event *condition,
  82                 struct lttng_payload_view *view,
  83                 struct lttng_evaluation **_evaluation);
  84
  85 LTTNG_HIDDEN
  86 enum lttng_error_code
  87 lttng_condition_on_event_generate_capture_descriptor_bytecode(
  88                 struct lttng_condition *condition);
  89
  90 LTTNG_HIDDEN
  91 const struct lttng_bytecode *
  92 lttng_condition_on_event_get_capture_bytecode_at_index(
  93                 const struct lttng_condition *condition, unsigned int index);
  94
  95 #endif /* LTTNG_CONDITION_ON_EVENT_INTERNAL_H */