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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> |
14 | #include <linux/unistd.h> |
15 | #include <asm/atomic.h> |
16 | #include <string.h> |
17 | #include <sys/types.h> |
18 | #include <stdint.h> |
19 | |
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20 | #ifdef LTT_TRACE_FAST |
21 | #include <ltt/ltt-usertrace-fast.h> |
22 | #endif //LTT_TRACE_FAST |
23 | |
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24 | #ifndef min |
25 | #define min(a,b) ((a)<(b)?(a):(b)) |
26 | #endif |
27 | |
28 | //Put in asm-i486/unistd.h |
29 | #define __NR_ltt_trace_generic 294 |
30 | #define __NR_ltt_register_generic 295 |
31 | |
32 | #undef NR_syscalls |
33 | #define NR_syscalls 296 |
34 | |
35 | //FIXME : setup for ARM |
36 | //FIXME : setup for MIPS |
37 | |
38 | #ifndef _LIBC |
39 | // Put in bits/syscall.h |
40 | #define SYS_ltt_trace_generic __NR_ltt_trace_generic |
41 | #define SYS_ltt_register_generic __NR_ltt_register_generic |
42 | #endif |
43 | |
44 | #define FACNAME_LEN 32 |
45 | |
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46 | /* LTT userspace tracing is non blocking by default when buffers are full */ |
47 | #ifndef LTT_BLOCKING |
48 | #define LTT_BLOCKING 0 |
49 | #endif //LTT_BLOCKING |
50 | |
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51 | typedef unsigned int ltt_facility_t; |
52 | |
53 | struct user_facility_info { |
54 | char name[FACNAME_LEN]; |
55 | unsigned int num_events; |
56 | size_t alignment; |
57 | uint32_t checksum; |
58 | size_t int_size; |
59 | size_t long_size; |
60 | size_t pointer_size; |
61 | size_t size_t_size; |
62 | }; |
63 | |
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64 | static inline __attribute__((no_instrument_function)) |
65 | _syscall5(int, ltt_trace_generic, unsigned int, facility_id, |
66 | unsigned int, event_id, void *, data, size_t, data_size, int, blocking) |
67 | static inline __attribute__((no_instrument_function)) |
68 | _syscall2(int, ltt_register_generic, unsigned int *, facility_id, |
69 | const struct user_facility_info *, info) |
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70 | |
71 | #ifndef LTT_PACK |
72 | /* Calculate the offset needed to align the type */ |
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73 | static inline unsigned int __attribute__((no_instrument_function)) |
74 | ltt_align(size_t align_drift, |
75 | size_t size_of_type) |
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76 | { |
77 | size_t alignment = min(sizeof(void*), size_of_type); |
78 | |
79 | return ((alignment - align_drift) & (alignment-1)); |
80 | } |
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81 | #define LTT_ALIGN |
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82 | #else |
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83 | static inline unsigned int __attribute__((no_instrument_function)) |
84 | ltt_align(size_t align_drift, |
85 | size_t size_of_type) |
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86 | { |
87 | return 0; |
88 | } |
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89 | #define LTT_ALIGN __attribute__((packed)) |
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90 | #endif //LTT_PACK |
91 | |
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92 | #endif //_LTT_USERTRACE_H |
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93 | |
94 | |