liblttng-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 <ust-helper.h>
  16 #include <ust-dynamic-type.h>
  17
  18 #define ctf_enum_value(_string, _value)                                 \
  19         __LTTNG_COMPOUND_LITERAL(struct lttng_ust_enum_entry, {         \
  20                 .struct_size = sizeof(struct lttng_ust_enum_entry),             \
  21                 .start = {                                              \
  22                         .signedness = lttng_is_signed_type(__typeof__(_value)), \
  23                         .value = lttng_is_signed_type(__typeof__(_value)) ? \
  24                                 (long long) (_value) : (_value),        \
  25                 },                                                      \
  26                 .end = {                                                \
  27                         .signedness = lttng_is_signed_type(__typeof__(_value)), \
  28                         .value = lttng_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] = ctf_enum_value("_none", 0)
  36         [LTTNG_UST_DYNAMIC_TYPE_S8] = ctf_enum_value("_int8", 1)
  37         [LTTNG_UST_DYNAMIC_TYPE_S16] = ctf_enum_value("_int16", 2)
  38         [LTTNG_UST_DYNAMIC_TYPE_S32] = ctf_enum_value("_int32", 3)
  39         [LTTNG_UST_DYNAMIC_TYPE_S64] = ctf_enum_value("_int64", 4)
  40         [LTTNG_UST_DYNAMIC_TYPE_U8] = ctf_enum_value("_uint8", 5)
  41         [LTTNG_UST_DYNAMIC_TYPE_U16] = ctf_enum_value("_uint16", 6)
  42         [LTTNG_UST_DYNAMIC_TYPE_U32] = ctf_enum_value("_uint32", 7)
  43         [LTTNG_UST_DYNAMIC_TYPE_U64] = ctf_enum_value("_uint64", 8)
  44         [LTTNG_UST_DYNAMIC_TYPE_FLOAT] = ctf_enum_value("_float", 9)
  45         [LTTNG_UST_DYNAMIC_TYPE_DOUBLE] = ctf_enum_value("_double", 10)
  46         [LTTNG_UST_DYNAMIC_TYPE_STRING] = ctf_enum_value("_string", 11)
  47 };
  48
  49 static const 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_COMPOUND_LITERAL(struct lttng_ust_event_field, {
  57                 .struct_size = sizeof(struct lttng_ust_event_field),
  58                 .name = "none",
  59                 .type = {
  60                         .atype = atype_struct_nestable,
  61                         .u.struct_nestable.nr_fields = 0,       /* empty struct. */
  62                         .u.struct_nestable.alignment = 0,
  63                 },
  64                 .nowrite = 0,
  65         }),
  66         [LTTNG_UST_DYNAMIC_TYPE_S8] = __LTTNG_COMPOUND_LITERAL(struct lttng_ust_event_field, {
  67                 .struct_size = sizeof(struct lttng_ust_event_field),
  68                 .name = "int8",
  69                 .type = __type_integer(int8_t, BYTE_ORDER, 10, none),
  70                 .nowrite = 0,
  71         }),
  72         [LTTNG_UST_DYNAMIC_TYPE_S16] = __LTTNG_COMPOUND_LITERAL(struct lttng_ust_event_field, {
  73                 .struct_size = sizeof(struct lttng_ust_event_field),
  74                 .name = "int16",
  75                 .type = __type_integer(int16_t, BYTE_ORDER, 10, none),
  76                 .nowrite = 0,
  77         }),
  78         [LTTNG_UST_DYNAMIC_TYPE_S32] = __LTTNG_COMPOUND_LITERAL(struct lttng_ust_event_field, {
  79                 .struct_size = sizeof(struct lttng_ust_event_field),
  80                 .name = "int32",
  81                 .type = __type_integer(int32_t, BYTE_ORDER, 10, none),
  82                 .nowrite = 0,
  83         }),
  84         [LTTNG_UST_DYNAMIC_TYPE_S64] = __LTTNG_COMPOUND_LITERAL(struct lttng_ust_event_field, {
  85                 .struct_size = sizeof(struct lttng_ust_event_field),
  86                 .name = "int64",
  87                 .type = __type_integer(int64_t, BYTE_ORDER, 10, none),
  88                 .nowrite = 0,
  89         }),
  90         [LTTNG_UST_DYNAMIC_TYPE_U8] = __LTTNG_COMPOUND_LITERAL(struct lttng_ust_event_field, {
  91                 .struct_size = sizeof(struct lttng_ust_event_field),
  92                 .name = "uint8",
  93                 .type = __type_integer(uint8_t, BYTE_ORDER, 10, none),
  94                 .nowrite = 0,
  95         }),
  96         [LTTNG_UST_DYNAMIC_TYPE_U16] = __LTTNG_COMPOUND_LITERAL(struct lttng_ust_event_field, {
  97                 .struct_size = sizeof(struct lttng_ust_event_field),
  98                 .name = "uint16",
  99                 .type = __type_integer(uint16_t, BYTE_ORDER, 10, none),
 100                 .nowrite = 0,
 101         }),
 102         [LTTNG_UST_DYNAMIC_TYPE_U32] = __LTTNG_COMPOUND_LITERAL(struct lttng_ust_event_field, {
 103                 .struct_size = sizeof(struct lttng_ust_event_field),
 104                 .name = "uint32",
 105                 .type = __type_integer(uint32_t, BYTE_ORDER, 10, none),
 106                 .nowrite = 0,
 107         }),
 108         [LTTNG_UST_DYNAMIC_TYPE_U64] = __LTTNG_COMPOUND_LITERAL(struct lttng_ust_event_field, {
 109                 .struct_size = sizeof(struct lttng_ust_event_field),
 110                 .name = "uint64",
 111                 .type = __type_integer(uint64_t, BYTE_ORDER, 10, none),
 112                 .nowrite = 0,
 113         }),
 114         [LTTNG_UST_DYNAMIC_TYPE_FLOAT] = __LTTNG_COMPOUND_LITERAL(struct lttng_ust_event_field, {
 115                 .struct_size = sizeof(struct lttng_ust_event_field),
 116                 .name = "float",
 117                 .type = __type_float(float),
 118                 .nowrite = 0,
 119         }),
 120         [LTTNG_UST_DYNAMIC_TYPE_DOUBLE] = __LTTNG_COMPOUND_LITERAL(struct lttng_ust_event_field, {
 121                 .struct_size = sizeof(struct lttng_ust_event_field),
 122                 .name = "double",
 123                 .type = __type_float(double),
 124                 .nowrite = 0,
 125         }),
 126         [LTTNG_UST_DYNAMIC_TYPE_STRING] = __LTTNG_COMPOUND_LITERAL(struct lttng_ust_event_field, {
 127                 .struct_size = sizeof(struct lttng_ust_event_field),
 128                 .name = "string",
 129                 .type = {
 130                         .atype = atype_string,
 131                         .u.string.encoding = lttng_encode_UTF8,
 132                 },
 133                 .nowrite = 0,
 134         }),
 135 };
 136
 137 static const struct lttng_ust_event_field dt_enum_field = {
 138         .name = NULL,
 139         .type.atype = atype_enum_nestable,
 140         .type.u.enum_nestable.desc = &dt_enum_desc,
 141         .type.u.enum_nestable.container_type =
 142                 __LTTNG_COMPOUND_LITERAL(struct lttng_type,
 143                         __type_integer(char, BYTE_ORDER, 10, none)),
 144         .nowrite = 0,
 145 };
 146
 147 const struct lttng_ust_event_field *lttng_ust_dynamic_type_field(int64_t value)
 148 {
 149         if (value >= _NR_LTTNG_UST_DYNAMIC_TYPES || value < 0)
 150                 return NULL;
 151         return dt_var_fields[value];
 152 }
 153
 154 int lttng_ust_dynamic_type_choices(size_t *nr_choices, const struct lttng_ust_event_field ***choices)
 155 {
 156         *nr_choices = _NR_LTTNG_UST_DYNAMIC_TYPES;
 157         *choices = dt_var_fields;
 158         return 0;
 159 }
 160
 161 const struct lttng_ust_event_field *lttng_ust_dynamic_type_tag_field(void)
 162 {
 163         return &dt_enum_field;
 164 }