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         LTTNG_OPTIONAL(uint64_t) error_count;
  29         /*
  30          * Internal use only.
  31          * Error accounting counter index.
  32          */
  33         LTTNG_OPTIONAL(uint64_t) error_counter_index;
  34
  35         /* Array of `struct lttng_capture_descriptor *`. */
  36         struct lttng_dynamic_pointer_array capture_descriptors;
  37 };
  38
  39 struct lttng_evaluation_on_event {
  40         struct lttng_evaluation parent;
  41
  42         /* MessagePack-encoded captured event field values. */
  43         struct lttng_dynamic_buffer capture_payload;
  44
  45         /*
  46          * The content of this array event field value is the decoded
  47          * version of `capture_payload` above.
  48          *
  49          * This is a cache: it's not serialized/deserialized in
  50          * communications from/to the library and the session daemon.
  51          */
  52         struct lttng_event_field_value *captured_values;
  53 };
  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 void lttng_condition_on_event_set_error_counter_index(
  68                 struct lttng_condition *condition, uint64_t error_counter_index);
  69
  70 LTTNG_HIDDEN
  71 uint64_t lttng_condition_on_event_get_error_counter_index(
  72                 const struct lttng_condition *condition);
  73
  74 LTTNG_HIDDEN
  75 uint64_t lttng_condition_on_event_get_error_count(
  76                 const struct lttng_condition *condition);
  77
  78 LTTNG_HIDDEN
  79 void lttng_condition_on_event_set_error_count(struct lttng_condition *condition,
  80                 uint64_t error_count);
  81
  82 LTTNG_HIDDEN
  83 struct lttng_evaluation *lttng_evaluation_on_event_create(
  84                 const struct lttng_condition_on_event *condition,
  85                 const char *capture_payload, size_t capture_payload_size,
  86                 bool decode_capture_payload);
  87
  88 LTTNG_HIDDEN
  89 ssize_t lttng_evaluation_on_event_create_from_payload(
  90                 const struct lttng_condition_on_event *condition,
  91                 struct lttng_payload_view *view,
  92                 struct lttng_evaluation **_evaluation);
  93
  94 LTTNG_HIDDEN
  95 enum lttng_error_code
  96 lttng_condition_on_event_generate_capture_descriptor_bytecode(
  97                 struct lttng_condition *condition);
  98
  99 LTTNG_HIDDEN
 100 const struct lttng_bytecode *
 101 lttng_condition_on_event_get_capture_bytecode_at_index(
 102                 const struct lttng_condition *condition, unsigned int index);
 103
 104 #endif /* LTTNG_CONDITION_ON_EVENT_INTERNAL_H */