| 1 | #ifndef _LTT_MARKERS_H |
| 2 | #define _LTT_MARKERS_H |
| 3 | |
| 4 | /* |
| 5 | * Marker support header. |
| 6 | * |
| 7 | * Mathieu Desnoyers, August 2007 |
| 8 | * License: LGPL. |
| 9 | */ |
| 10 | |
| 11 | #include <glib.h> |
| 12 | #include <ltt/trace.h> |
| 13 | #include <ltt/compiler.h> |
| 14 | #include <ltt/marker-field.h> |
| 15 | #include <ltt/trace.h> |
| 16 | |
| 17 | #define LTT_ATTRIBUTE_NETWORK_BYTE_ORDER (1<<1) |
| 18 | |
| 19 | /* static ids 0-7 reserved for internal use. */ |
| 20 | #define MARKER_CORE_IDS 8 |
| 21 | |
| 22 | struct marker_info; |
| 23 | |
| 24 | struct marker_info { |
| 25 | GQuark name; |
| 26 | char *format; |
| 27 | long size; /* size if known statically, else -1 */ |
| 28 | guint8 largest_align; /* Size of the largest alignment needed in the |
| 29 | payload. */ |
| 30 | GArray *fields; /* Array of struct marker_field */ |
| 31 | guint8 int_size, long_size, pointer_size, size_t_size; |
| 32 | guint8 alignment; /* Size on which the architecture alignment must be |
| 33 | done. Useful to encapsulate x86_32 events on |
| 34 | x86_64 kernels. */ |
| 35 | struct marker_info *next; /* Linked list of markers with the same name */ |
| 36 | }; |
| 37 | |
| 38 | struct marker_data { |
| 39 | GArray *markers; //indexed by marker id |
| 40 | GHashTable *markers_hash; //indexed by name hash |
| 41 | GHashTable *markers_format_hash; //indexed by name hash |
| 42 | }; |
| 43 | |
| 44 | enum marker_id { |
| 45 | MARKER_ID_SET_MARKER_ID = 0, /* Static IDs available (range 0-7) */ |
| 46 | MARKER_ID_SET_MARKER_FORMAT, |
| 47 | }; |
| 48 | |
| 49 | static inline guint16 marker_get_id_from_info(struct marker_data *data, |
| 50 | struct marker_info *info) |
| 51 | { |
| 52 | return ((unsigned long)info - (unsigned long)data->markers->data) |
| 53 | / sizeof(struct marker_info); |
| 54 | } |
| 55 | |
| 56 | static inline struct marker_info *marker_get_info_from_id( |
| 57 | struct marker_data *data, guint16 id) |
| 58 | { |
| 59 | if (unlikely(data->markers->len <= id)) |
| 60 | return NULL; |
| 61 | return &g_array_index(data->markers, struct marker_info, id); |
| 62 | } |
| 63 | |
| 64 | /* |
| 65 | * Returns the head of the marker info list for that name. |
| 66 | */ |
| 67 | static inline struct marker_info *marker_get_info_from_name( |
| 68 | struct marker_data *data, GQuark name) |
| 69 | { |
| 70 | gpointer orig_key, value; |
| 71 | int res; |
| 72 | |
| 73 | res = g_hash_table_lookup_extended(data->markers_hash, |
| 74 | (gconstpointer)(gulong)name, &orig_key, &value); |
| 75 | if (!res) |
| 76 | return NULL; |
| 77 | return marker_get_info_from_id(data, (guint16)(gulong)value); |
| 78 | } |
| 79 | |
| 80 | static inline char *marker_get_format_from_name(struct marker_data *data, |
| 81 | GQuark name) |
| 82 | { |
| 83 | gpointer orig_key, value; |
| 84 | int res; |
| 85 | |
| 86 | res = g_hash_table_lookup_extended(data->markers_format_hash, |
| 87 | (gconstpointer)(gulong)name, &orig_key, &value); |
| 88 | if (!res) |
| 89 | return NULL; |
| 90 | return (char *)value; |
| 91 | } |
| 92 | |
| 93 | static inline struct marker_field *marker_get_field(struct marker_info *info, |
| 94 | guint i) |
| 95 | { |
| 96 | return &g_array_index(info->fields, struct marker_field, i); |
| 97 | } |
| 98 | |
| 99 | static inline unsigned int marker_get_num_fields(struct marker_info *info) |
| 100 | { |
| 101 | return info->fields->len; |
| 102 | } |
| 103 | |
| 104 | /* |
| 105 | * for_each_marker_field - iterate over fields of a marker |
| 106 | * @field: struct marker_field * to use as iterator |
| 107 | * @info: marker info pointer |
| 108 | */ |
| 109 | #define for_each_marker_field(field, info) \ |
| 110 | for (field = marker_get_field(info, 0); \ |
| 111 | field != marker_get_field(info, marker_get_num_fields(info)); \ |
| 112 | field++) |
| 113 | |
| 114 | int marker_format_event(LttTrace *trace, GQuark channel, GQuark name, |
| 115 | const char *format); |
| 116 | int marker_id_event(LttTrace *trace, GQuark channel, GQuark name, guint16 id, |
| 117 | uint8_t int_size, uint8_t long_size, uint8_t pointer_size, |
| 118 | uint8_t size_t_size, uint8_t alignment); |
| 119 | struct marker_data *allocate_marker_data(void); |
| 120 | void destroy_marker_data(struct marker_data *data); |
| 121 | |
| 122 | #endif //_LTT_MARKERS_H |