projects / ust.git / blame
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|---|---|---|
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1 | /* |
| 2 | * Copyright (C) 2005,2006 Mathieu Desnoyers (mathieu.desnoyers@polymtl.ca) | |
| 3 | * | |
| 4 | * This contains the core definitions for the Linux Trace Toolkit. | |
| 8fc2d8db PMF |
5 | * |
| 6 | * This library is free software; you can redistribute it and/or | |
| 7 | * modify it under the terms of the GNU Lesser General Public | |
| 8 | * License as published by the Free Software Foundation; either | |
| 9 | * version 2.1 of the License, or (at your option) any later version. | |
| 10 | * | |
| 11 | * This library is distributed in the hope that it will be useful, | |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 14 | * Lesser General Public License for more details. | |
| 15 | * | |
| 16 | * You should have received a copy of the GNU Lesser General Public | |
| 17 | * License along with this library; if not, write to the Free Software | |
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
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19 | */ |
| 20 | ||
| 21 | #ifndef LTT_CORE_H | |
| 22 | #define LTT_CORE_H | |
| 23 | ||
| fbca6b62 | 24 | #include <ust/kernelcompat.h> |
| 183646e6 PMF |
25 | //ust// #include <linux/percpu.h> |
| 26 | ||
| 27 | /* ltt's root dir in debugfs */ | |
| 28 | #define LTT_ROOT "ltt" | |
| 29 | ||
| 30 | /* | |
| 31 | * All modifications of ltt_traces must be done by ltt-tracer.c, while holding | |
| 32 | * the semaphore. Only reading of this information can be done elsewhere, with | |
| 33 | * the RCU mechanism : the preemption must be disabled while reading the | |
| 34 | * list. | |
| 35 | */ | |
| 36 | struct ltt_traces { | |
| 37 | struct list_head setup_head; /* Pre-allocated traces list */ | |
| 38 | struct list_head head; /* Allocated Traces list */ | |
| 39 | unsigned int num_active_traces; /* Number of active traces */ | |
| 40 | } ____cacheline_aligned; | |
| 41 | ||
| 42 | extern struct ltt_traces ltt_traces; | |
| 43 | ||
| 44 | /* | |
| 45 | * get dentry of ltt's root dir | |
| 46 | */ | |
| 47 | struct dentry *get_ltt_root(void); | |
| 48 | ||
| 49 | /* Keep track of trap nesting inside LTT */ | |
| 50 | //ust// DECLARE_PER_CPU(unsigned int, ltt_nesting); | |
| bb07823d | 51 | extern unsigned int ltt_nesting; |
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52 | |
| 53 | typedef int (*ltt_run_filter_functor)(void *trace, uint16_t eID); | |
| 1ae7f074 | 54 | //typedef int (*ltt_run_filter_functor)(void *, __u16); |
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55 | |
| 56 | extern ltt_run_filter_functor ltt_run_filter; | |
| 57 | ||
| 58 | extern void ltt_filter_register(ltt_run_filter_functor func); | |
| 59 | extern void ltt_filter_unregister(void); | |
| 60 | ||
| 61 | #if defined(CONFIG_LTT) && defined(CONFIG_LTT_ALIGNMENT) | |
| 62 | ||
| 63 | /* | |
| 64 | * Calculate the offset needed to align the type. | |
| 65 | * size_of_type must be non-zero. | |
| 66 | */ | |
| 67 | static inline unsigned int ltt_align(size_t align_drift, size_t size_of_type) | |
| 68 | { | |
| 69 | size_t alignment = min(sizeof(void *), size_of_type); | |
| 70 | return (alignment - align_drift) & (alignment - 1); | |
| 71 | } | |
| 72 | /* Default arch alignment */ | |
| 73 | #define LTT_ALIGN | |
| 74 | ||
| 75 | static inline int ltt_get_alignment(void) | |
| 76 | { | |
| 77 | return sizeof(void *); | |
| 78 | } | |
| 79 | ||
| 80 | #else | |
| 81 | ||
| 82 | static inline unsigned int ltt_align(size_t align_drift, | |
| 83 | size_t size_of_type) | |
| 84 | { | |
| 85 | return 0; | |
| 86 | } | |
| 87 | ||
| 88 | #define LTT_ALIGN __attribute__((packed)) | |
| 89 | ||
| 90 | static inline int ltt_get_alignment(void) | |
| 91 | { | |
| 92 | return 0; | |
| 93 | } | |
| 94 | #endif /* defined(CONFIG_LTT) && defined(CONFIG_LTT_ALIGNMENT) */ | |
| 95 | ||
| 96 | #endif /* LTT_CORE_H */ |