probes/lttng-types.h

   1 /*
   2  * Protect against multiple inclusion of structure declarations, but run the
   3  * stages below each time.
   4  */
   5 #ifndef _LTTNG_PROBES_LTTNG_TYPES_H
   6 #define _LTTNG_PROBES_LTTNG_TYPES_H
   7
   8 #include <lttng.h>
   9
  10 enum abstract_types {
  11         atype_integer,
  12         atype_enum,
  13         atype_array,
  14         NR_ABSTRACT_TYPES,
  15 };
  16
  17 struct lttng_enum_entry {
  18         unsigned long long start, end;  /* start and end are inclusive */
  19         const char *string;
  20 };
  21
  22 struct lttng_enum {
  23         const struct lttng_enum_entry *entries;
  24         unsigned int len;
  25 };
  26
  27 struct lttng_type {
  28         enum abstract_types atype;
  29         const char *name;
  30         union {
  31                 struct {
  32                         unsigned int size;              /* in bits */
  33                         unsigned short alignment;       /* in bits */
  34                         unsigned int signedness:1;
  35                 } integer;
  36                 struct {
  37                         const char *parent_type;
  38                         const struct lttng_enum def;
  39                 } enumeration;
  40                 struct {
  41                         const char *elem_type;
  42                         unsigned int length;            /* num. elems. */
  43                 } array;
  44         } u;
  45 } __attribute__((packed));
  46
  47 #endif /* _LTTNG_PROBES_LTTNG_TYPES_H */
  48
  49
  50 /* Export enumerations */
  51
  52 #ifdef STAGE_EXPORT_ENUMS
  53
  54 #undef TRACE_EVENT_TYPE
  55 #define TRACE_EVENT_TYPE(_name, _abstract_type, args...)
  56
  57 #undef TRACE_EVENT_ENUM
  58 #define TRACE_EVENT_ENUM(_name, _entries...)                            \
  59         const struct lttng_enum_entry __trace_event_enum_##_name[] = {  \
  60                 PARAMS(_entries)                                        \
  61         };
  62
  63 /* Enumeration entry (single value) */
  64 #undef V
  65 #define V(_string)              { _string, _string, #_string}
  66
  67 /* Enumeration entry (range) */
  68 #undef R
  69 #define R(_string, _range_start, _range_end)                            \
  70         { _range_start, _range_end, #_string }
  71
  72 #endif /* STAGE_EXPORT_ENUMS */
  73
  74
  75 /* Export named types */
  76
  77 #ifdef STAGE_EXPORT_TYPES
  78
  79 #undef TRACE_EVENT_TYPE___integer
  80 #define TRACE_EVENT_TYPE___integer(_name, _unused)              \
  81                 {                                               \
  82                   .atype = atype_integer,                       \
  83                   .name = #_name,                               \
  84                   .u.integer.size = sizeof(_name) * 8,          \
  85                   .u.integer.alignment = __alignof__(_name) * 8,\
  86                   .u.integer.signedness = is_signed_type(_name),\
  87                 },
  88
  89 #undef TRACE_EVENT_TYPE___enum
  90 #define TRACE_EVENT_TYPE___enum(_name, _parent_type)            \
  91                 {                                               \
  92                   .atype = atype_enum,                          \
  93                   .name = #_name,                               \
  94                   .u.enumeration.parent_type = #_parent_type,   \
  95                   .u.enumeration.def.entries = __trace_event_enum_##_name, \
  96                   .u.enumeration.def.len = ARRAY_SIZE(__trace_event_enum_##_name), \
  97                 },
  98
  99 #undef TRACE_EVENT_TYPE___array
 100 #define TRACE_EVENT_TYPE___array(_name, _elem_type, _length)    \
 101                 {                                               \
 102                   .atype = atype_array,                         \
 103                   .name = #_name,                               \
 104                   .u.array.elem_type = #_elem_type,             \
 105                   .u.array.length = _length,                    \
 106                 },
 107
 108 /* Local declaration */
 109 #undef TRACE_EVENT_TYPE
 110 #define TRACE_EVENT_TYPE(_name, _abstract_type, args...)        \
 111                 TRACE_EVENT_TYPE___##_abstract_type(_name, args)
 112
 113 #undef TRACE_EVENT_ENUM
 114 #define TRACE_EVENT_ENUM(_name, _entries...)
 115
 116 #endif /* STAGE_EXPORT_TYPES */