Commit | Line | Data |
---|---|---|
bc0c38d1 SR |
1 | #ifndef _LINUX_KERNEL_TRACE_H |
2 | #define _LINUX_KERNEL_TRACE_H | |
3 | ||
4 | #include <linux/fs.h> | |
5 | #include <asm/atomic.h> | |
6 | #include <linux/sched.h> | |
7 | #include <linux/clocksource.h> | |
8 | ||
9 | /* | |
10 | * Function trace entry - function address and parent function addres: | |
11 | */ | |
12 | struct ftrace_entry { | |
13 | unsigned long ip; | |
14 | unsigned long parent_ip; | |
15 | }; | |
16 | ||
17 | /* | |
18 | * Context switch trace entry - which task (and prio) we switched from/to: | |
19 | */ | |
20 | struct ctx_switch_entry { | |
21 | unsigned int prev_pid; | |
22 | unsigned char prev_prio; | |
23 | unsigned char prev_state; | |
24 | unsigned int next_pid; | |
25 | unsigned char next_prio; | |
bac524d3 | 26 | unsigned char next_state; |
bc0c38d1 SR |
27 | }; |
28 | ||
f0a920d5 IM |
29 | /* |
30 | * Special (free-form) trace entry: | |
31 | */ | |
32 | struct special_entry { | |
33 | unsigned long arg1; | |
34 | unsigned long arg2; | |
35 | unsigned long arg3; | |
36 | }; | |
37 | ||
86387f7e IM |
38 | /* |
39 | * Stack-trace entry: | |
40 | */ | |
41 | ||
42 | #define FTRACE_STACK_ENTRIES 5 | |
43 | ||
44 | struct stack_entry { | |
45 | unsigned long caller[FTRACE_STACK_ENTRIES]; | |
46 | }; | |
47 | ||
bc0c38d1 SR |
48 | /* |
49 | * The trace entry - the most basic unit of tracing. This is what | |
50 | * is printed in the end as a single line in the trace output, such as: | |
51 | * | |
52 | * bash-15816 [01] 235.197585: idle_cpu <- irq_enter | |
53 | */ | |
54 | struct trace_entry { | |
55 | char type; | |
56 | char cpu; | |
57 | char flags; | |
58 | char preempt_count; | |
59 | int pid; | |
60 | cycle_t t; | |
bc0c38d1 SR |
61 | union { |
62 | struct ftrace_entry fn; | |
63 | struct ctx_switch_entry ctx; | |
f0a920d5 | 64 | struct special_entry special; |
86387f7e | 65 | struct stack_entry stack; |
bc0c38d1 SR |
66 | }; |
67 | }; | |
68 | ||
69 | #define TRACE_ENTRY_SIZE sizeof(struct trace_entry) | |
70 | ||
71 | /* | |
72 | * The CPU trace array - it consists of thousands of trace entries | |
73 | * plus some other descriptor data: (for example which task started | |
74 | * the trace, etc.) | |
75 | */ | |
76 | struct trace_array_cpu { | |
4c11d7ae | 77 | struct list_head trace_pages; |
bc0c38d1 | 78 | atomic_t disabled; |
b3806b43 | 79 | spinlock_t lock; |
d4c5a2f5 | 80 | struct lock_class_key lock_key; |
4e3c3333 | 81 | |
c7aafc54 | 82 | /* these fields get copied into max-trace: */ |
93a588f4 SR |
83 | unsigned trace_head_idx; |
84 | unsigned trace_tail_idx; | |
85 | void *trace_head; /* producer */ | |
86 | void *trace_tail; /* consumer */ | |
c7aafc54 | 87 | unsigned long trace_idx; |
bc0c38d1 SR |
88 | unsigned long saved_latency; |
89 | unsigned long critical_start; | |
90 | unsigned long critical_end; | |
91 | unsigned long critical_sequence; | |
92 | unsigned long nice; | |
93 | unsigned long policy; | |
94 | unsigned long rt_priority; | |
95 | cycle_t preempt_timestamp; | |
96 | pid_t pid; | |
97 | uid_t uid; | |
98 | char comm[TASK_COMM_LEN]; | |
99 | }; | |
100 | ||
101 | struct trace_iterator; | |
102 | ||
103 | /* | |
104 | * The trace array - an array of per-CPU trace arrays. This is the | |
105 | * highest level data structure that individual tracers deal with. | |
106 | * They have on/off state as well: | |
107 | */ | |
108 | struct trace_array { | |
109 | unsigned long entries; | |
110 | long ctrl; | |
111 | int cpu; | |
112 | cycle_t time_start; | |
b3806b43 | 113 | struct task_struct *waiter; |
bc0c38d1 SR |
114 | struct trace_array_cpu *data[NR_CPUS]; |
115 | }; | |
116 | ||
117 | /* | |
118 | * A specific tracer, represented by methods that operate on a trace array: | |
119 | */ | |
120 | struct tracer { | |
121 | const char *name; | |
122 | void (*init)(struct trace_array *tr); | |
123 | void (*reset)(struct trace_array *tr); | |
124 | void (*open)(struct trace_iterator *iter); | |
125 | void (*close)(struct trace_iterator *iter); | |
126 | void (*start)(struct trace_iterator *iter); | |
127 | void (*stop)(struct trace_iterator *iter); | |
128 | void (*ctrl_update)(struct trace_array *tr); | |
60a11774 SR |
129 | #ifdef CONFIG_FTRACE_STARTUP_TEST |
130 | int (*selftest)(struct tracer *trace, | |
131 | struct trace_array *tr); | |
132 | #endif | |
bc0c38d1 SR |
133 | struct tracer *next; |
134 | int print_max; | |
135 | }; | |
136 | ||
214023c3 SR |
137 | struct trace_seq { |
138 | unsigned char buffer[PAGE_SIZE]; | |
139 | unsigned int len; | |
140 | }; | |
141 | ||
bc0c38d1 SR |
142 | /* |
143 | * Trace iterator - used by printout routines who present trace | |
144 | * results to users and which routines might sleep, etc: | |
145 | */ | |
146 | struct trace_iterator { | |
214023c3 | 147 | struct trace_seq seq; |
bc0c38d1 SR |
148 | struct trace_array *tr; |
149 | struct tracer *trace; | |
4e3c3333 | 150 | |
bc0c38d1 | 151 | struct trace_entry *ent; |
4e3c3333 IM |
152 | int cpu; |
153 | ||
154 | struct trace_entry *prev_ent; | |
155 | int prev_cpu; | |
156 | ||
bc0c38d1 SR |
157 | unsigned long iter_flags; |
158 | loff_t pos; | |
159 | unsigned long next_idx[NR_CPUS]; | |
4c11d7ae SR |
160 | struct list_head *next_page[NR_CPUS]; |
161 | unsigned next_page_idx[NR_CPUS]; | |
162 | long idx; | |
bc0c38d1 SR |
163 | }; |
164 | ||
e309b41d | 165 | void tracing_reset(struct trace_array_cpu *data); |
bc0c38d1 SR |
166 | int tracing_open_generic(struct inode *inode, struct file *filp); |
167 | struct dentry *tracing_init_dentry(void); | |
168 | void ftrace(struct trace_array *tr, | |
169 | struct trace_array_cpu *data, | |
170 | unsigned long ip, | |
171 | unsigned long parent_ip, | |
172 | unsigned long flags); | |
173 | void tracing_sched_switch_trace(struct trace_array *tr, | |
174 | struct trace_array_cpu *data, | |
175 | struct task_struct *prev, | |
176 | struct task_struct *next, | |
177 | unsigned long flags); | |
178 | void tracing_record_cmdline(struct task_struct *tsk); | |
57422797 IM |
179 | |
180 | void tracing_sched_wakeup_trace(struct trace_array *tr, | |
181 | struct trace_array_cpu *data, | |
182 | struct task_struct *wakee, | |
183 | struct task_struct *cur, | |
184 | unsigned long flags); | |
f0a920d5 IM |
185 | void trace_special(struct trace_array *tr, |
186 | struct trace_array_cpu *data, | |
187 | unsigned long arg1, | |
188 | unsigned long arg2, | |
189 | unsigned long arg3); | |
6fb44b71 SR |
190 | void trace_function(struct trace_array *tr, |
191 | struct trace_array_cpu *data, | |
192 | unsigned long ip, | |
193 | unsigned long parent_ip, | |
194 | unsigned long flags); | |
bc0c38d1 SR |
195 | |
196 | void tracing_start_function_trace(void); | |
197 | void tracing_stop_function_trace(void); | |
198 | int register_tracer(struct tracer *type); | |
199 | void unregister_tracer(struct tracer *type); | |
200 | ||
201 | extern unsigned long nsecs_to_usecs(unsigned long nsecs); | |
202 | ||
203 | extern unsigned long tracing_max_latency; | |
204 | extern unsigned long tracing_thresh; | |
205 | ||
206 | void update_max_tr(struct trace_array *tr, struct task_struct *tsk, int cpu); | |
207 | void update_max_tr_single(struct trace_array *tr, | |
208 | struct task_struct *tsk, int cpu); | |
209 | ||
e309b41d | 210 | extern cycle_t ftrace_now(int cpu); |
bc0c38d1 SR |
211 | |
212 | #ifdef CONFIG_SCHED_TRACER | |
e309b41d | 213 | extern void |
bc0c38d1 | 214 | wakeup_sched_switch(struct task_struct *prev, struct task_struct *next); |
57422797 IM |
215 | extern void |
216 | wakeup_sched_wakeup(struct task_struct *wakee, struct task_struct *curr); | |
bc0c38d1 SR |
217 | #else |
218 | static inline void | |
219 | wakeup_sched_switch(struct task_struct *prev, struct task_struct *next) | |
220 | { | |
221 | } | |
57422797 IM |
222 | static inline void |
223 | wakeup_sched_wakeup(struct task_struct *wakee, struct task_struct *curr) | |
224 | { | |
225 | } | |
bc0c38d1 SR |
226 | #endif |
227 | ||
228 | #ifdef CONFIG_CONTEXT_SWITCH_TRACER | |
229 | typedef void | |
230 | (*tracer_switch_func_t)(void *private, | |
231 | struct task_struct *prev, | |
232 | struct task_struct *next); | |
233 | ||
234 | struct tracer_switch_ops { | |
235 | tracer_switch_func_t func; | |
236 | void *private; | |
237 | struct tracer_switch_ops *next; | |
238 | }; | |
239 | ||
240 | extern int register_tracer_switch(struct tracer_switch_ops *ops); | |
241 | extern int unregister_tracer_switch(struct tracer_switch_ops *ops); | |
242 | ||
243 | #endif /* CONFIG_CONTEXT_SWITCH_TRACER */ | |
244 | ||
245 | #ifdef CONFIG_DYNAMIC_FTRACE | |
246 | extern unsigned long ftrace_update_tot_cnt; | |
d05cdb25 SR |
247 | #define DYN_FTRACE_TEST_NAME trace_selftest_dynamic_test_func |
248 | extern int DYN_FTRACE_TEST_NAME(void); | |
bc0c38d1 SR |
249 | #endif |
250 | ||
60a11774 SR |
251 | #ifdef CONFIG_FTRACE_STARTUP_TEST |
252 | #ifdef CONFIG_FTRACE | |
253 | extern int trace_selftest_startup_function(struct tracer *trace, | |
254 | struct trace_array *tr); | |
255 | #endif | |
256 | #ifdef CONFIG_IRQSOFF_TRACER | |
257 | extern int trace_selftest_startup_irqsoff(struct tracer *trace, | |
258 | struct trace_array *tr); | |
259 | #endif | |
260 | #ifdef CONFIG_PREEMPT_TRACER | |
261 | extern int trace_selftest_startup_preemptoff(struct tracer *trace, | |
262 | struct trace_array *tr); | |
263 | #endif | |
264 | #if defined(CONFIG_IRQSOFF_TRACER) && defined(CONFIG_PREEMPT_TRACER) | |
265 | extern int trace_selftest_startup_preemptirqsoff(struct tracer *trace, | |
266 | struct trace_array *tr); | |
267 | #endif | |
268 | #ifdef CONFIG_SCHED_TRACER | |
269 | extern int trace_selftest_startup_wakeup(struct tracer *trace, | |
270 | struct trace_array *tr); | |
271 | #endif | |
272 | #ifdef CONFIG_CONTEXT_SWITCH_TRACER | |
273 | extern int trace_selftest_startup_sched_switch(struct tracer *trace, | |
274 | struct trace_array *tr); | |
275 | #endif | |
276 | #endif /* CONFIG_FTRACE_STARTUP_TEST */ | |
277 | ||
c7aafc54 IM |
278 | extern void *head_page(struct trace_array_cpu *data); |
279 | ||
4e655519 IM |
280 | extern unsigned long trace_flags; |
281 | ||
282 | enum trace_iterator_flags { | |
283 | TRACE_ITER_PRINT_PARENT = 0x01, | |
284 | TRACE_ITER_SYM_OFFSET = 0x02, | |
285 | TRACE_ITER_SYM_ADDR = 0x04, | |
286 | TRACE_ITER_VERBOSE = 0x08, | |
287 | TRACE_ITER_RAW = 0x10, | |
288 | TRACE_ITER_HEX = 0x20, | |
289 | TRACE_ITER_BIN = 0x40, | |
290 | TRACE_ITER_BLOCK = 0x80, | |
291 | TRACE_ITER_STACKTRACE = 0x100, | |
4ac3ba41 | 292 | TRACE_ITER_SCHED_TREE = 0x200, |
4e655519 IM |
293 | }; |
294 | ||
bc0c38d1 | 295 | #endif /* _LINUX_KERNEL_TRACE_H */ |