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1 | /***************************************************************************** |
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2 | * ltt-usertrace.h |
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3 | * |
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4 | * LTT userspace tracing header |
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5 | * |
6 | * Mathieu Desnoyers, March 2006 |
7 | */ |
8 | |
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9 | #ifndef _LTT_USERTRACE_H |
10 | #define _LTT_USERTRACE_H |
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11 | |
12 | #include <errno.h> |
13 | #include <syscall.h> |
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14 | #include <string.h> |
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15 | #include <stdint.h> |
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16 | #include <sys/types.h> |
17 | #include <linux/unistd.h> |
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18 | #if defined(__powerpc__) || defined(__powerpc64__) |
19 | #include "ltt/ltt-usertrace-ppc.h" |
20 | #else |
21 | #include <asm/atomic.h> |
22 | #endif |
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23 | |
24 | #ifndef min |
25 | #define min(a,b) ((a)<(b)?(a):(b)) |
26 | #endif |
27 | |
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28 | #ifdef i386 |
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29 | #define __NR_ltt_trace_generic 311 |
30 | #define __NR_ltt_register_generic 312 |
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31 | #undef NR_syscalls |
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32 | #define NR_syscalls 313 |
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33 | #endif |
34 | |
35 | #ifdef powerpc |
36 | #define __NR_ltt_trace_generic 283 |
37 | #define __NR_ltt_register_generic 284 |
38 | #undef NR_syscalls |
39 | #define NR_syscalls 285 |
40 | #endif |
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41 | |
42 | //FIXME : setup for ARM |
43 | //FIXME : setup for MIPS |
44 | |
45 | #ifndef _LIBC |
46 | // Put in bits/syscall.h |
47 | #define SYS_ltt_trace_generic __NR_ltt_trace_generic |
48 | #define SYS_ltt_register_generic __NR_ltt_register_generic |
49 | #endif |
50 | |
51 | #define FACNAME_LEN 32 |
52 | |
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53 | /* LTT userspace tracing is non blocking by default when buffers are full */ |
54 | #ifndef LTT_BLOCKING |
55 | #define LTT_BLOCKING 0 |
56 | #endif //LTT_BLOCKING |
57 | |
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58 | typedef unsigned int ltt_facility_t; |
59 | |
60 | struct user_facility_info { |
61 | char name[FACNAME_LEN]; |
62 | unsigned int num_events; |
63 | size_t alignment; |
64 | uint32_t checksum; |
65 | size_t int_size; |
66 | size_t long_size; |
67 | size_t pointer_size; |
68 | size_t size_t_size; |
69 | }; |
70 | |
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71 | static inline __attribute__((no_instrument_function)) |
72 | _syscall5(int, ltt_trace_generic, unsigned int, facility_id, |
73 | unsigned int, event_id, void *, data, size_t, data_size, int, blocking) |
74 | static inline __attribute__((no_instrument_function)) |
75 | _syscall2(int, ltt_register_generic, unsigned int *, facility_id, |
76 | const struct user_facility_info *, info) |
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77 | |
78 | #ifndef LTT_PACK |
79 | /* Calculate the offset needed to align the type */ |
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80 | static inline unsigned int __attribute__((no_instrument_function)) |
81 | ltt_align(size_t align_drift, |
82 | size_t size_of_type) |
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83 | { |
84 | size_t alignment = min(sizeof(void*), size_of_type); |
85 | |
86 | return ((alignment - align_drift) & (alignment-1)); |
87 | } |
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88 | #define LTT_ALIGN |
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89 | #else |
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90 | static inline unsigned int __attribute__((no_instrument_function)) |
91 | ltt_align(size_t align_drift, |
92 | size_t size_of_type) |
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93 | { |
94 | return 0; |
95 | } |
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96 | #define LTT_ALIGN __attribute__((packed)) |
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97 | #endif //LTT_PACK |
98 | |
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99 | #ifdef LTT_TRACE_FAST |
100 | #include <ltt/ltt-usertrace-fast.h> |
101 | #endif //LTT_TRACE_FAST |
102 | |
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103 | #endif //_LTT_USERTRACE_H |
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104 | |
105 | |