1 /* This file is part of the Linux Trace Toolkit viewer
2 * Copyright (C) 2003-2004 Xiangxiu Yang
3 * 2006 Mathieu Desnoyers
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License Version 2.1 as published by the Free Software Foundation.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
24 #include <sys/types.h>
27 #include <ltt/event.h>
30 #define max(a,b) ((a)>(b)?(a):(b))
34 #define min(a,b) ((a)<(b)?(a):(b))
39 #define LTT_MAGIC_NUMBER 0x00D6B7ED
40 #define LTT_REV_MAGIC_NUMBER 0xEDB7D600
42 #define NSEC_PER_USEC 1000
44 #define LTT_PACKED_STRUCT __attribute__ ((packed))
47 #define LTT_GET_BO(t) ((t)->reverse_bo)
49 #define LTT_HAS_FLOAT(t) ((t)->float_word_order!=0)
50 #define LTT_GET_FLOAT_BO(t) \
51 (((t)->float_word_order==__BYTE_ORDER)?0:1)
53 #define SEQUENCE_AVG_ELEMENTS 1000
55 typedef guint8
uint8_t;
56 typedef guint16
uint16_t;
57 typedef guint32
uint32_t;
58 typedef guint64
uint64_t;
60 /* Block and trace headers */
62 struct ltt_trace_header_any
{
63 uint32_t magic_number
;
65 uint32_t arch_variant
;
66 uint32_t float_word_order
;
68 uint8_t major_version
;
69 uint8_t minor_version
;
70 uint8_t flight_recorder
;
71 uint8_t alignment
; /* Architecture alignment */
74 struct ltt_trace_header_2_0
{
75 uint32_t magic_number
;
77 uint32_t arch_variant
;
78 uint32_t float_word_order
;
80 uint8_t major_version
;
81 uint8_t minor_version
;
82 uint8_t flight_recorder
;
83 uint8_t alignment
; /* Architecture alignment */
90 uint64_t start_monotonic
;
91 uint64_t start_time_sec
;
92 uint64_t start_time_usec
;
95 struct ltt_block_start_header
{
101 uint64_t cycle_count
;
104 uint32_t lost_size
; /* Size unused at the end of the buffer */
105 uint32_t buf_size
; /* The size of this sub-buffer */
106 struct ltt_trace_header_any trace
[0];
110 enum field_status
{ FIELD_UNKNOWN
, FIELD_VARIABLE
, FIELD_FIXED
};
112 typedef struct _LttBuffer
{
118 uint64_t cycle_count
;
119 uint64_t freq
; /* Frequency in khz */
123 uint64_t cycle_count
;
124 uint64_t freq
; /* Frequency in khz */
126 uint32_t lost_size
; /* Size unused at the end of the buffer */
129 uint64_t tsc
; /* Current timestamp counter */
130 uint64_t freq
; /* Frequency in khz */
131 //double nsecs_per_cycle; /* Precalculated from freq */
132 guint32 cyc2ns_scale
;
135 struct LttTracefile
{
136 gboolean cpu_online
; //is the cpu online ?
137 GQuark long_name
; //tracefile complete filename
138 GQuark name
; //tracefile name
139 guint cpu_num
; //cpu number of the tracefile
140 guint tid
; //Usertrace tid, else 0
141 guint pgid
; //Usertrace pgid, else 0
142 guint64 creation
; //Usertrace creation, else 0
143 LttTrace
* trace
; //trace containing the tracefile
144 int fd
; //file descriptor
145 off_t file_size
; //file size
146 //unsigned block_size; //block_size
147 guint num_blocks
; //number of blocks in the file
148 gboolean reverse_bo
; //must we reverse byte order ?
149 gboolean float_word_order
; //what is the byte order of floats ?
150 size_t alignment
; //alignment of events in the tracefile.
151 // 0 or the architecture size in bytes.
153 size_t buffer_header_size
;
157 uint64_t tsc_mask_next_bit
; //next MSB after the mask
160 LttEvent event
; //Event currently accessible in the trace
163 LttBuffer buffer
; //current buffer
164 guint32 buf_size
; /* The size of blocks */
167 /* The characteristics of the system on which the trace was obtained
168 is described in a LttSystemDescription structure. */
170 struct LttSystemDescription
{
176 LttArchEndian endian
;
178 gchar
*kernel_release
;
179 gchar
*kernel_version
;
182 gchar
*hardware_platform
;
183 gchar
*operating_system
;
188 /* Calculate the offset needed to align the type.
189 * If alignment is 0, alignment is disactivated.
190 * else, the function returns the offset needed to
191 * align align_drift on the alignment value (should be
192 * the size of the architecture). */
193 static inline unsigned int ltt_align(size_t align_drift
,
197 size_t align_offset
= min(alignment
, size_of_type
);
202 g_assert(size_of_type
!= 0);
203 return ((align_offset
- align_drift
) & (align_offset
-1));
207 #endif /* LTT_PRIVATE_H */