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
45 #define LTT_GET_BO(t) ((t)->reverse_bo)
47 #define LTT_HAS_FLOAT(t) ((t)->float_word_order ! =0)
48 #define LTT_GET_FLOAT_BO(t) \
49 (((t)->float_word_order == __BYTE_ORDER) ? 0 : 1)
51 #define SEQUENCE_AVG_ELEMENTS 1000
54 * offsetof taken from Linux kernel.
57 #ifdef __compiler_offsetof
58 #define offsetof(TYPE,MEMBER) __compiler_offsetof(TYPE,MEMBER)
60 #define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
63 typedef guint8
uint8_t;
64 typedef guint16
uint16_t;
65 typedef guint32
uint32_t;
66 typedef guint64
uint64_t;
68 /* Subbuffer header */
69 struct ltt_subbuffer_header_2_6
{
70 uint64_t cycle_count_begin
; /* Cycle count at subbuffer start */
71 uint64_t cycle_count_end
; /* Cycle count at subbuffer end */
72 uint32_t magic_number
; /*
74 * contains endianness information.
76 uint8_t major_version
;
77 uint8_t minor_version
;
78 uint8_t arch_size
; /* Architecture pointer size */
79 uint8_t alignment
; /* LTT data alignment */
80 uint64_t start_time_sec
; /* NTP-corrected start time */
81 uint64_t start_time_usec
;
82 uint64_t start_freq
; /*
83 * Frequency at trace start,
84 * used all along the trace.
86 uint32_t freq_scale
; /* Frequency scaling (divide freq) */
87 uint32_t data_size
; /* Size of data in subbuffer */
88 uint32_t sb_size
; /* Subbuffer size (page aligned) */
89 uint32_t events_lost
; /*
90 * Events lost in this subbuffer since
91 * the beginning of the trace.
94 uint32_t subbuf_corrupt
; /*
95 * Corrupted (lost) subbuffers since
96 * the begginig of the trace.
99 char header_end
[0]; /* End of header */
102 typedef struct ltt_subbuffer_header_2_6 ltt_subbuffer_header_t
;
105 * Return header size without padding after the structure. Don't use packed
106 * structure because gcc generates inefficient code on some architectures
109 static inline size_t ltt_subbuffer_header_size(void)
111 return offsetof(ltt_subbuffer_header_t
, header_end
);
114 enum field_status
{ FIELD_UNKNOWN
, FIELD_VARIABLE
, FIELD_FIXED
};
116 typedef struct _LttBuffer
{
118 guint64 offset
; /* Offset of the current subbuffer */
119 guint32 size
; /* The size of the current subbuffer */
121 uint32_t data_size
; /* Size of data in the subbuffer */
125 uint64_t cycle_count
;
126 uint64_t freq
; /* Frequency in khz */
130 uint64_t cycle_count
;
131 uint64_t freq
; /* Frequency in khz */
135 uint64_t tsc
; /* Current timestamp counter */
136 uint64_t freq
; /* Frequency in khz */
137 guint32 cyc2ns_scale
;
140 struct LttTracefile
{
141 gboolean cpu_online
; //is the cpu online ?
142 GQuark long_name
; //tracefile complete filename
143 GQuark name
; //tracefile name
144 guint cpu_num
; //cpu number of the tracefile
145 guint tid
; //Usertrace tid, else 0
146 guint pgid
; //Usertrace pgid, else 0
147 guint64 creation
; //Usertrace creation, else 0
148 LttTrace
* trace
; //trace containing the tracefile
149 struct marker_data
*mdata
; // marker id/name/fields mapping
150 int fd
; //file descriptor
151 off_t file_size
; //file size
152 //unsigned block_size; //block_size
153 guint num_blocks
; //number of blocks in the file
154 gboolean reverse_bo
; //must we reverse byte order ?
155 gboolean float_word_order
; //what is the byte order of floats ?
156 size_t alignment
; //alignment of events in the tracefile.
157 // 0 or the architecture size in bytes.
159 size_t buffer_header_size
;
163 uint64_t tsc_mask_next_bit
; //next MSB after the mask<
164 uint32_t events_lost
;
165 uint32_t subbuf_corrupt
;
167 GArray
*buf_index
; /* index mapping buffer index to offset */
170 LttEvent event
; //Event currently accessible in the trace
173 LttBuffer buffer
; //current buffer
176 /* The characteristics of the system on which the trace was obtained
177 is described in a LttSystemDescription structure. */
179 struct LttSystemDescription
{
185 LttArchEndian endian
;
187 gchar
*kernel_release
;
188 gchar
*kernel_version
;
191 gchar
*hardware_platform
;
192 gchar
*operating_system
;
198 * Calculate the offset needed to align the type.
199 * If alignment is 0, alignment is deactivated.
200 * else, the function returns the offset needed to
201 * align align_drift on the alignment value.
203 * align align_drift on the alignment value (should be
204 * the size of the architecture).
206 static inline unsigned int ltt_align(size_t align_drift
,
210 size_t align_offset
= min(alignment
, size_of_type
);
215 g_assert(size_of_type
!= 0);
216 return ((align_offset
- align_drift
) & (align_offset
-1));
220 #endif /* LTT_PRIVATE_H */