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1 | #ifndef TRACE_H |
2 | #define TRACE_H |
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3 | |
4 | #include <ltt/ltt.h> |
5 | |
6 | /* A trace is specified as a pathname to the directory containing all the |
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7 | associated data (control tracefiles, per cpu tracefiles, event |
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8 | descriptions...). |
9 | |
10 | When a trace is closed, all the associated facilities, types and fields |
11 | are released as well. */ |
12 | |
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13 | LttTrace *ltt_trace_open(char *pathname); |
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14 | |
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15 | void ltt_trace_close(LttTrace *t); |
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16 | |
17 | |
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18 | /* The characteristics of the system on which the trace was obtained |
19 | is described in a LttSystemDescription structure. */ |
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20 | |
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21 | struct _LttSystemDescription { |
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22 | char *description; |
23 | char *node_name; |
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24 | char *domain_name; |
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25 | unsigned nb_cpu; |
26 | LttArchSize size; |
27 | LttArchEndian endian; |
28 | char *kernel_name; |
29 | char *kernel_release; |
30 | char *kernel_version; |
31 | char *machine; |
32 | char *processor; |
33 | char *hardware_platform; |
34 | char *operating_system; |
35 | unsigned ltt_major_version; |
36 | unsigned ltt_minor_version; |
37 | unsigned ltt_block_size; |
38 | LttTime trace_start; |
39 | LttTime trace_end; |
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40 | }; |
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41 | |
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42 | LttSystemDescription *ltt_trace_system_description(LttTrace *t); |
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43 | |
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44 | |
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45 | /* Functions to discover the facilities in the trace. Once the number |
46 | of facilities is known, they may be accessed by position. Multiple |
47 | versions of a facility (same name, different checksum) have consecutive |
48 | positions. */ |
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49 | |
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50 | unsigned ltt_trace_facility_number(LttTrace *t); |
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51 | |
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52 | LttFacility *ltt_trace_facility_get(LttTrace *t, unsigned i); |
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53 | |
54 | |
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55 | /* Look for a facility by name. It returns the number of facilities found |
56 | and sets the position argument to the first found. Returning 0, the named |
57 | facility is unknown, returning 1, the named facility is at the specified |
58 | position, returning n, the facilities are from position to |
59 | position + n - 1. */ |
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60 | |
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61 | unsigned ltt_trace_facility_find(LttTrace *t, char *name, unsigned *position); |
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62 | |
63 | |
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64 | /* Functions to discover all the event types in the trace */ |
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65 | |
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66 | unsigned ltt_trace_eventtype_number(LttTrace *t); |
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67 | |
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68 | LttEventType *ltt_trace_eventtype_get(LttTrace *t, unsigned i); |
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69 | |
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70 | |
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71 | /* There is one "per cpu" tracefile for each CPU, numbered from 0 to |
72 | the maximum number of CPU in the system. When the number of CPU installed |
73 | is less than the maximum, some positions are unused. There are also a |
74 | number of "control" tracefiles (facilities, interrupts...). */ |
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75 | |
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76 | unsigned ltt_trace_control_tracefile_number(LttTrace *t); |
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77 | |
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78 | unsigned ltt_trace_per_cpu_tracefile_number(LttTrace *t); |
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79 | |
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80 | |
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81 | /* It is possible to search for the tracefiles by name or by CPU position. |
82 | The index within the tracefiles of the same type is returned if found |
83 | and a negative value otherwise. */ |
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84 | |
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85 | int ltt_trace_control_tracefile_find(LttTrace *t, char *name); |
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86 | |
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87 | int ltt_trace_per_cpu_tracefile_find(LttTrace *t, unsigned i); |
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88 | |
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89 | |
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90 | /* Get a specific tracefile */ |
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91 | |
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92 | LttTracefile *ltt_trace_control_tracefile_get(LttTrace *t, unsigned i); |
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93 | |
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94 | LttTracefile *ltt_trace_per_cpu_tracefile_get(LttTrace *t, unsigned i); |
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95 | |
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96 | |
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97 | /* Get the start time and end time of the trace */ |
98 | |
99 | void ltt_trace_time_span_get(LttTrace *t, LttTime *start, LttTime *end); |
100 | |
101 | |
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102 | /* Get the name of a tracefile */ |
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103 | |
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104 | char *ltt_tracefile_name(LttTracefile *tf); |
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105 | |
106 | |
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107 | /* Get the number of blocks in the tracefile */ |
108 | |
109 | unsigned ltt_tracefile_block_number(LttTracefile *tf); |
110 | |
111 | |
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112 | /* Seek to the first event of the trace with time larger or equal to time */ |
113 | |
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114 | void ltt_tracefile_seek_time(LttTracefile *t, LttTime time); |
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115 | |
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116 | /* Seek to the first event with position equal or larger to ep */ |
117 | |
118 | void ltt_tracefile_seek_position(LttTracefile *t, |
119 | LttEventPosition *ep); |
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120 | |
121 | /* Read the next event */ |
122 | |
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123 | LttEvent *ltt_tracefile_read(LttTracefile *t); |
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124 | |
125 | #endif // TRACE_H |