include/babeltrace/ctf-ir/metadata.h

   1 #ifndef _BABELTRACE_CTF_IR_METADATA_H
   2 #define _BABELTRACE_CTF_IR_METADATA_H
   3
   4 /*
   5  * BabelTrace
   6  *
   7  * CTF Intermediate Representation Metadata Header
   8  *
   9  * Copyright 2011 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
  10  *
  11  * Permission is hereby granted, free of charge, to any person obtaining a copy
  12  * of this software and associated documentation files (the "Software"), to deal
  13  * in the Software without restriction, including without limitation the rights
  14  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  15  * copies of the Software, and to permit persons to whom the Software is
  16  * furnished to do so, subject to the following conditions:
  17  *
  18  * The above copyright notice and this permission notice shall be included in
  19  * all copies or substantial portions of the Software.
  20  */
  21
  22 #include <babeltrace/types.h>
  23 #include <babeltrace/format.h>
  24 #include <babeltrace/ctf/types.h>
  25 #include <sys/types.h>
  26 #include <dirent.h>
  27 #include <babeltrace/uuid.h>
  28 #include <assert.h>
  29 #include <glib.h>
  30
  31 struct ctf_trace;
  32 struct ctf_stream_declaration;
  33 struct ctf_event_declaration;
  34 struct ctf_clock;
  35
  36 struct ctf_stream_definition {
  37         struct ctf_stream_declaration *stream_class;
  38         uint64_t real_timestamp;                /* Current timestamp, in ns */
  39         uint64_t cycles_timestamp;              /* Current timestamp, in cycles */
  40         uint64_t event_id;                      /* Current event ID */
  41         int has_timestamp;
  42         uint64_t stream_id;
  43
  44         struct definition_struct *trace_packet_header;
  45         struct definition_struct *stream_packet_context;
  46         struct definition_struct *stream_event_header;
  47         struct definition_struct *stream_event_context;
  48         GPtrArray *events_by_id;                /* Array of struct ctf_event_definition pointers indexed by id */
  49         struct definition_scope *parent_def_scope;      /* for initialization */
  50         int stream_definitions_created;
  51
  52         struct ctf_clock *current_clock;
  53
  54         /* Event discarded information */
  55         uint64_t events_discarded;
  56         uint64_t prev_real_timestamp;           /* Start-of-last-packet timestamp in ns */
  57         uint64_t prev_real_timestamp_end;       /* End-of-last-packet timestamp in ns */
  58         uint64_t prev_cycles_timestamp;         /* Start-of-last-packet timestamp in cycles */
  59         uint64_t prev_cycles_timestamp_end;     /* End-of-last-packet timestamp in cycles */
  60 };
  61
  62 struct ctf_event_definition {
  63         struct ctf_stream_definition *stream;
  64         struct definition_struct *event_context;
  65         struct definition_struct *event_fields;
  66 };
  67
  68 #define CTF_CLOCK_SET_FIELD(ctf_clock, field)                           \
  69         do {                                                            \
  70                 (ctf_clock)->field_mask |= CTF_CLOCK_ ## field;         \
  71         } while (0)
  72
  73 #define CTF_CLOCK_FIELD_IS_SET(ctf_clock, field)                        \
  74                 ((ctf_clock)->field_mask & CTF_CLOCK_ ## field)
  75
  76 #define CTF_CLOCK_GET_FIELD(ctf_clock, field)                           \
  77         ({                                                              \
  78                 assert(CTF_CLOCK_FIELD_IS_SET(ctf_clock, field));       \
  79                 (ctf_clock)->(field);                                   \
  80         })
  81
  82 struct ctf_clock {
  83         GQuark name;
  84         GQuark uuid;
  85         char *description;
  86         uint64_t freq;  /* frequency, in HZ */
  87         /* precision in seconds is: precision * (1/freq) */
  88         uint64_t precision;
  89         /*
  90          * The offset from Epoch is: offset_s + (offset * (1/freq))
  91          * Coarse clock offset from Epoch (in seconds).
  92          */
  93         uint64_t offset_s;
  94         /* Fine clock offset from Epoch, in (1/freq) units. */
  95         uint64_t offset;
  96         int absolute;
  97
  98         enum {                                  /* Fields populated mask */
  99                 CTF_CLOCK_name          =       (1U << 0),
 100                 CTF_CLOCK_freq          =       (1U << 1),
 101         } field_mask;
 102 };
 103
 104 #define CTF_TRACE_SET_FIELD(ctf_trace, field)                           \
 105         do {                                                            \
 106                 (ctf_trace)->field_mask |= CTF_TRACE_ ## field;         \
 107         } while (0)
 108
 109 #define CTF_TRACE_FIELD_IS_SET(ctf_trace, field)                        \
 110                 ((ctf_trace)->field_mask & CTF_TRACE_ ## field)
 111
 112 #define CTF_TRACE_GET_FIELD(ctf_trace, field)                           \
 113         ({                                                              \
 114                 assert(CTF_TRACE_FIELD_IS_SET(ctf_trace, field));       \
 115                 (ctf_trace)->(field);                                   \
 116         })
 117
 118 #define TRACER_ENV_LEN  128
 119
 120 /* tracer-specific environment */
 121 struct ctf_tracer_env {
 122         int vpid;               /* negative if unset */
 123
 124         /* All strings below: "" if unset. */
 125         char procname[TRACER_ENV_LEN];
 126         char domain[TRACER_ENV_LEN];
 127         char sysname[TRACER_ENV_LEN];
 128         char release[TRACER_ENV_LEN];
 129         char version[TRACER_ENV_LEN];
 130 };
 131
 132 struct ctf_trace {
 133         struct trace_descriptor parent;
 134         /* root scope */
 135         struct declaration_scope *root_declaration_scope;
 136
 137         struct declaration_scope *declaration_scope;
 138         /* innermost definition scope. to be used as parent of stream. */
 139         struct definition_scope *definition_scope;
 140         GPtrArray *streams;                     /* Array of struct ctf_stream_declaration pointers */
 141         struct ctf_stream_definition *metadata;
 142         GHashTable *clocks;
 143         struct ctf_clock *single_clock;         /* currently supports only one clock */
 144         struct trace_collection *collection;    /* Container of this trace */
 145         GPtrArray *event_declarations;          /* Array of all the struct bt_ctf_event_decl */
 146
 147         struct declaration_struct *packet_header_decl;
 148
 149         uint64_t major;
 150         uint64_t minor;
 151         unsigned char uuid[BABELTRACE_UUID_LEN];
 152         int byte_order;         /* trace BYTE_ORDER. 0 if unset. */
 153         struct ctf_tracer_env env;
 154
 155         enum {                                  /* Fields populated mask */
 156                 CTF_TRACE_major         =       (1U << 0),
 157                 CTF_TRACE_minor         =       (1U << 1),
 158                 CTF_TRACE_uuid          =       (1U << 2),
 159                 CTF_TRACE_byte_order    =       (1U << 3),
 160                 CTF_TRACE_packet_header =       (1U << 4),
 161         } field_mask;
 162
 163         /* Information about trace backing directory and files */
 164         DIR *dir;
 165         int dirfd;
 166         int flags;              /* open flags */
 167
 168         /* Heap of streams, ordered to always get the lowest timestam */
 169         struct ptr_heap *stream_heap;
 170         char path[PATH_MAX];
 171
 172         struct bt_context *ctx;
 173         struct bt_trace_handle *handle;
 174 };
 175
 176 #define CTF_STREAM_SET_FIELD(ctf_stream, field)                         \
 177         do {                                                            \
 178                 (ctf_stream)->field_mask |= CTF_STREAM_ ## field;       \
 179         } while (0)
 180
 181 #define CTF_STREAM_FIELD_IS_SET(ctf_stream, field)                      \
 182                 ((ctf_stream)->field_mask & CTF_STREAM_ ## field)
 183
 184 #define CTF_STREAM_GET_FIELD(ctf_stream, field)                         \
 185         ({                                                              \
 186                 assert(CTF_STREAM_FIELD_IS_SET(ctf_stream, field));     \
 187                 (ctf_stream)->(field);                                  \
 188         })
 189
 190 struct ctf_stream_declaration {
 191         struct ctf_trace *trace;
 192         /* parent is lexical scope conaining the stream scope */
 193         struct declaration_scope *declaration_scope;
 194         /* innermost definition scope. to be used as parent of event. */
 195         struct definition_scope *definition_scope;
 196         GPtrArray *events_by_id;                /* Array of struct ctf_event_declaration pointers indexed by id */
 197         GHashTable *event_quark_to_id;          /* GQuark to numeric id */
 198
 199         struct declaration_struct *packet_context_decl;
 200         struct declaration_struct *event_header_decl;
 201         struct declaration_struct *event_context_decl;
 202
 203         uint64_t stream_id;
 204
 205         enum {                                  /* Fields populated mask */
 206                 CTF_STREAM_stream_id =  (1 << 0),
 207         } field_mask;
 208
 209         GPtrArray *streams;     /* Array of struct ctf_stream_definition pointers */
 210 };
 211
 212 #define CTF_EVENT_SET_FIELD(ctf_event, field)                           \
 213         do {                                                            \
 214                 (ctf_event)->field_mask |= CTF_EVENT_ ## field;         \
 215         } while (0)
 216
 217 #define CTF_EVENT_FIELD_IS_SET(ctf_event, field)                        \
 218                 ((ctf_event)->field_mask & CTF_EVENT_ ## field)
 219
 220 #define CTF_EVENT_GET_FIELD(ctf_event, field)                           \
 221         ({                                                              \
 222                 assert(CTF_EVENT_FIELD_IS_SET(ctf_event, field));       \
 223                 (ctf_event)->(field);                                   \
 224         })
 225
 226 struct ctf_event_declaration {
 227         /* stream mapped by stream_id */
 228         struct ctf_stream_declaration *stream;
 229         /* parent is lexical scope conaining the event scope */
 230         struct declaration_scope *declaration_scope;
 231
 232         struct declaration_struct *context_decl;
 233         struct declaration_struct *fields_decl;
 234
 235         GQuark name;
 236         uint64_t id;            /* Numeric identifier within the stream */
 237         uint64_t stream_id;
 238         int loglevel;
 239
 240         enum {                                  /* Fields populated mask */
 241                 CTF_EVENT_name  =               (1 << 0),
 242                 CTF_EVENT_id    =               (1 << 1),
 243                 CTF_EVENT_stream_id =           (1 << 2),
 244                 CTF_EVENT_loglevel =            (1 << 4),
 245         } field_mask;
 246 };
 247
 248 #endif /* _BABELTRACE_CTF_IR_METADATA_H */