| 1 | /* |
| 2 | * event-internal.h |
| 3 | * |
| 4 | * Linux Trace Toolkit Control Library |
| 5 | * |
| 6 | * Copyright (C) 2017 Jérémie Galarneau <jeremie.galarneau@efficios.com> |
| 7 | * |
| 8 | * SPDX-License-Identifier: LGPL-2.1-only |
| 9 | * |
| 10 | */ |
| 11 | |
| 12 | #ifndef LTTNG_EVENT_INTERNAL_H |
| 13 | #define LTTNG_EVENT_INTERNAL_H |
| 14 | |
| 15 | #include <common/macros.h> |
| 16 | #include <lttng/event.h> |
| 17 | #include <lttng/lttng-error.h> |
| 18 | |
| 19 | struct lttng_event_exclusion; |
| 20 | struct lttng_userspace_probe_location; |
| 21 | struct lttng_dynamic_buffer; |
| 22 | struct lttng_buffer_view; |
| 23 | |
| 24 | struct lttng_event_comm { |
| 25 | int8_t event_type; |
| 26 | int8_t loglevel_type; |
| 27 | int32_t loglevel; |
| 28 | int8_t enabled; |
| 29 | int32_t pid; |
| 30 | uint32_t flags; |
| 31 | |
| 32 | /* Payload. */ |
| 33 | /* Includes terminator `\0`. */ |
| 34 | uint32_t name_len; |
| 35 | uint32_t exclusion_count; |
| 36 | /* Includes terminator `\0`. */ |
| 37 | uint32_t filter_expression_len; |
| 38 | uint32_t bytecode_len; |
| 39 | |
| 40 | /* Type specific payload. */ |
| 41 | uint32_t userspace_probe_location_len; |
| 42 | uint32_t lttng_event_probe_attr_len; |
| 43 | uint32_t lttng_event_function_attr_len; |
| 44 | |
| 45 | /* |
| 46 | * Contain: |
| 47 | * - name [name_len], |
| 48 | * - exclusions if any |
| 49 | * - char filter_expression[filter_expression_len], |
| 50 | * - unsigned char filter_bytecode[bytecode_len], |
| 51 | * - userspace probe location [userspace_probe_location_len], |
| 52 | * - probe or ftrace based on event type. |
| 53 | */ |
| 54 | |
| 55 | char payload[]; |
| 56 | } LTTNG_PACKED; |
| 57 | |
| 58 | struct lttng_event_exclusion_comm { |
| 59 | /* Includes terminator `\0`. */ |
| 60 | uint32_t len; |
| 61 | char payload []; |
| 62 | } LTTNG_PACKED; |
| 63 | |
| 64 | struct lttng_event_probe_attr_comm { |
| 65 | uint64_t addr; |
| 66 | uint64_t offset; |
| 67 | /* Includes terminator `\0`. */ |
| 68 | uint32_t symbol_name_len; |
| 69 | |
| 70 | char payload[]; |
| 71 | } LTTNG_PACKED; |
| 72 | |
| 73 | struct lttng_event_function_attr_comm { |
| 74 | /* Includes terminator `\0`. */ |
| 75 | uint32_t symbol_name_len; |
| 76 | |
| 77 | char payload[]; |
| 78 | } LTTNG_PACKED; |
| 79 | |
| 80 | struct lttng_event_extended { |
| 81 | /* |
| 82 | * exclusions and filter_expression are only set when the lttng_event |
| 83 | * was created/allocated by a list operation. These two elements must |
| 84 | * not be free'd as they are part of the same contiguous buffer that |
| 85 | * contains all events returned by the listing. |
| 86 | */ |
| 87 | char *filter_expression; |
| 88 | struct { |
| 89 | unsigned int count; |
| 90 | /* Array of strings of fixed LTTNG_SYMBOL_NAME_LEN length. */ |
| 91 | char *strings; |
| 92 | } exclusions; |
| 93 | struct lttng_userspace_probe_location *probe_location; |
| 94 | }; |
| 95 | |
| 96 | LTTNG_HIDDEN |
| 97 | struct lttng_event *lttng_event_copy(const struct lttng_event *event); |
| 98 | |
| 99 | ssize_t lttng_event_create_from_payload(struct lttng_payload_view *view, |
| 100 | struct lttng_event **out_event, |
| 101 | struct lttng_event_exclusion **out_exclusion, |
| 102 | char **out_filter_expression, |
| 103 | struct lttng_bytecode **out_bytecode); |
| 104 | |
| 105 | int lttng_event_serialize(const struct lttng_event *event, |
| 106 | unsigned int exclusion_count, |
| 107 | char **exclusion_list, |
| 108 | char *filter_expression, |
| 109 | size_t bytecode_len, |
| 110 | struct lttng_bytecode *bytecode, |
| 111 | struct lttng_payload *payload); |
| 112 | |
| 113 | enum lttng_error_code lttng_events_create_and_flatten_from_payload( |
| 114 | struct lttng_payload_view *view, |
| 115 | unsigned int count, |
| 116 | struct lttng_event **events); |
| 117 | |
| 118 | #endif /* LTTNG_EVENT_INTERNAL_H */ |