src/lib/lttng-ust/lttng-ust-dynamic-type.c

   1 /*
   2  * SPDX-License-Identifier: LGPL-2.1-only
   3  *
   4  * Copyright (C) 2016 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   5  *
   6  * UST dynamic type implementation.
   7  */
   8
   9 #define _LGPL_SOURCE
  10 #include <stdio.h>
  11 #include <stdint.h>
  12 #include <stddef.h>
  13 #include <inttypes.h>
  14
  15 #include "common/macros.h"
  16 #include "common/dynamic-type.h"
  17
  18 #define lttng_ust_field_enum_value(_string, _value)                                     \
  19         LTTNG_UST_COMPOUND_LITERAL(struct lttng_ust_enum_entry, {               \
  20                 .struct_size = sizeof(struct lttng_ust_enum_entry),             \
  21                 .start = {                                              \
  22                         .signedness = lttng_ust_is_signed_type(__typeof__(_value)), \
  23                         .value = lttng_ust_is_signed_type(__typeof__(_value)) ? \
  24                                 (long long) (_value) : (_value),        \
  25                 },                                                      \
  26                 .end = {                                                \
  27                         .signedness = lttng_ust_is_signed_type(__typeof__(_value)), \
  28                         .value = lttng_ust_is_signed_type(__typeof__(_value)) ? \
  29                                 (long long) (_value) : (_value),        \
  30                 },                                                      \
  31                 .string = (_string),                                    \
  32         }),
  33
  34 static const struct lttng_ust_enum_entry *dt_enum[_NR_LTTNG_UST_DYNAMIC_TYPES] = {
  35         [LTTNG_UST_DYNAMIC_TYPE_NONE] = lttng_ust_field_enum_value("_none", 0)
  36         [LTTNG_UST_DYNAMIC_TYPE_S8] = lttng_ust_field_enum_value("_int8", 1)
  37         [LTTNG_UST_DYNAMIC_TYPE_S16] = lttng_ust_field_enum_value("_int16", 2)
  38         [LTTNG_UST_DYNAMIC_TYPE_S32] = lttng_ust_field_enum_value("_int32", 3)
  39         [LTTNG_UST_DYNAMIC_TYPE_S64] = lttng_ust_field_enum_value("_int64", 4)
  40         [LTTNG_UST_DYNAMIC_TYPE_U8] = lttng_ust_field_enum_value("_uint8", 5)
  41         [LTTNG_UST_DYNAMIC_TYPE_U16] = lttng_ust_field_enum_value("_uint16", 6)
  42         [LTTNG_UST_DYNAMIC_TYPE_U32] = lttng_ust_field_enum_value("_uint32", 7)
  43         [LTTNG_UST_DYNAMIC_TYPE_U64] = lttng_ust_field_enum_value("_uint64", 8)
  44         [LTTNG_UST_DYNAMIC_TYPE_FLOAT] = lttng_ust_field_enum_value("_float", 9)
  45         [LTTNG_UST_DYNAMIC_TYPE_DOUBLE] = lttng_ust_field_enum_value("_double", 10)
  46         [LTTNG_UST_DYNAMIC_TYPE_STRING] = lttng_ust_field_enum_value("_string", 11)
  47 };
  48
  49 static struct lttng_ust_enum_desc dt_enum_desc = {
  50         .name = "dynamic_type_enum",
  51         .entries = dt_enum,
  52         .nr_entries = LTTNG_ARRAY_SIZE(dt_enum),
  53 };
  54
  55 const struct lttng_ust_event_field *dt_var_fields[_NR_LTTNG_UST_DYNAMIC_TYPES] = {
  56         [LTTNG_UST_DYNAMIC_TYPE_NONE] = LTTNG_UST_COMPOUND_LITERAL(const struct lttng_ust_event_field, {
  57                 .struct_size = sizeof(struct lttng_ust_event_field),
  58                 .name = "none",
  59                 .type = (struct lttng_ust_type_common *) LTTNG_UST_COMPOUND_LITERAL(struct lttng_ust_type_struct, {
  60                         .parent = {
  61                                 .type = lttng_ust_type_struct,
  62                         },
  63                         .struct_size = sizeof(struct lttng_ust_type_struct),
  64                         .nr_fields = 0, /* empty struct */
  65                         .alignment = 0,
  66                 }),
  67                 .nowrite = 0,
  68         }),
  69         [LTTNG_UST_DYNAMIC_TYPE_S8] = LTTNG_UST_COMPOUND_LITERAL(const struct lttng_ust_event_field, {
  70                 .struct_size = sizeof(struct lttng_ust_event_field),
  71                 .name = "int8",
  72                 .type = lttng_ust_type_integer_define(int8_t, LTTNG_UST_BYTE_ORDER, 10),
  73                 .nowrite = 0,
  74         }),
  75         [LTTNG_UST_DYNAMIC_TYPE_S16] = LTTNG_UST_COMPOUND_LITERAL(const struct lttng_ust_event_field, {
  76                 .struct_size = sizeof(struct lttng_ust_event_field),
  77                 .name = "int16",
  78                 .type = lttng_ust_type_integer_define(int16_t, LTTNG_UST_BYTE_ORDER, 10),
  79                 .nowrite = 0,
  80         }),
  81         [LTTNG_UST_DYNAMIC_TYPE_S32] = LTTNG_UST_COMPOUND_LITERAL(const struct lttng_ust_event_field, {
  82                 .struct_size = sizeof(struct lttng_ust_event_field),
  83                 .name = "int32",
  84                 .type = lttng_ust_type_integer_define(int32_t, LTTNG_UST_BYTE_ORDER, 10),
  85                 .nowrite = 0,
  86         }),
  87         [LTTNG_UST_DYNAMIC_TYPE_S64] = LTTNG_UST_COMPOUND_LITERAL(const struct lttng_ust_event_field, {
  88                 .struct_size = sizeof(struct lttng_ust_event_field),
  89                 .name = "int64",
  90                 .type = lttng_ust_type_integer_define(int64_t, LTTNG_UST_BYTE_ORDER, 10),
  91                 .nowrite = 0,
  92         }),
  93         [LTTNG_UST_DYNAMIC_TYPE_U8] = LTTNG_UST_COMPOUND_LITERAL(const struct lttng_ust_event_field, {
  94                 .struct_size = sizeof(struct lttng_ust_event_field),
  95                 .name = "uint8",
  96                 .type = lttng_ust_type_integer_define(uint8_t, LTTNG_UST_BYTE_ORDER, 10),
  97                 .nowrite = 0,
  98         }),
  99         [LTTNG_UST_DYNAMIC_TYPE_U16] = LTTNG_UST_COMPOUND_LITERAL(const struct lttng_ust_event_field, {
 100                 .struct_size = sizeof(struct lttng_ust_event_field),
 101                 .name = "uint16",
 102                 .type = lttng_ust_type_integer_define(uint16_t, LTTNG_UST_BYTE_ORDER, 10),
 103                 .nowrite = 0,
 104         }),
 105         [LTTNG_UST_DYNAMIC_TYPE_U32] = LTTNG_UST_COMPOUND_LITERAL(const struct lttng_ust_event_field, {
 106                 .struct_size = sizeof(struct lttng_ust_event_field),
 107                 .name = "uint32",
 108                 .type = lttng_ust_type_integer_define(uint32_t, LTTNG_UST_BYTE_ORDER, 10),
 109                 .nowrite = 0,
 110         }),
 111         [LTTNG_UST_DYNAMIC_TYPE_U64] = LTTNG_UST_COMPOUND_LITERAL(const struct lttng_ust_event_field, {
 112                 .struct_size = sizeof(struct lttng_ust_event_field),
 113                 .name = "uint64",
 114                 .type = lttng_ust_type_integer_define(uint64_t, LTTNG_UST_BYTE_ORDER, 10),
 115                 .nowrite = 0,
 116         }),
 117         [LTTNG_UST_DYNAMIC_TYPE_FLOAT] = LTTNG_UST_COMPOUND_LITERAL(const struct lttng_ust_event_field, {
 118                 .struct_size = sizeof(struct lttng_ust_event_field),
 119                 .name = "float",
 120                 .type = lttng_ust_type_float_define(float),
 121                 .nowrite = 0,
 122         }),
 123         [LTTNG_UST_DYNAMIC_TYPE_DOUBLE] = LTTNG_UST_COMPOUND_LITERAL(const struct lttng_ust_event_field, {
 124                 .struct_size = sizeof(struct lttng_ust_event_field),
 125                 .name = "double",
 126                 .type = lttng_ust_type_float_define(double),
 127                 .nowrite = 0,
 128         }),
 129         [LTTNG_UST_DYNAMIC_TYPE_STRING] = LTTNG_UST_COMPOUND_LITERAL(const struct lttng_ust_event_field, {
 130                 .struct_size = sizeof(struct lttng_ust_event_field),
 131                 .name = "string",
 132                 .type = (struct lttng_ust_type_common *) LTTNG_UST_COMPOUND_LITERAL(struct lttng_ust_type_string, {
 133                         .parent = {
 134                                 .type = lttng_ust_type_string,
 135                         },
 136                         .struct_size = sizeof(struct lttng_ust_type_string),
 137                         .encoding = lttng_ust_string_encoding_UTF8,
 138                 }),
 139                 .nowrite = 0,
 140         }),
 141 };
 142
 143 static const struct lttng_ust_event_field dt_enum_field = {
 144         .struct_size = sizeof(struct lttng_ust_event_field),
 145         .name = NULL,
 146         .type = (struct lttng_ust_type_common *) LTTNG_UST_COMPOUND_LITERAL(struct lttng_ust_type_enum, {
 147                 .parent = {
 148                         .type = lttng_ust_type_enum,
 149                 },
 150                 .struct_size = sizeof(struct lttng_ust_type_enum),
 151                 .desc = &dt_enum_desc,
 152                 .container_type = lttng_ust_type_integer_define(char, LTTNG_UST_BYTE_ORDER, 10),
 153         }),
 154         .nowrite = 0,
 155 };
 156
 157 const struct lttng_ust_event_field *lttng_ust_dynamic_type_field(int64_t value)
 158 {
 159         if (value >= _NR_LTTNG_UST_DYNAMIC_TYPES || value < 0)
 160                 return NULL;
 161         return dt_var_fields[value];
 162 }
 163
 164 int lttng_ust_dynamic_type_choices(size_t *nr_choices, const struct lttng_ust_event_field * const **choices)
 165 {
 166         *nr_choices = _NR_LTTNG_UST_DYNAMIC_TYPES;
 167         *choices = dt_var_fields;
 168         return 0;
 169 }
 170
 171 const struct lttng_ust_event_field *lttng_ust_dynamic_type_tag_field(void)
 172 {
 173         return &dt_enum_field;
 174 }