blob: cb629b3b108c501648bd2a4ba855f5489d780a12 [file] [log] [blame]
Steven Rostedtbc0c38d2008-05-12 21:20:42 +02001#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>
Steven Rostedt3928a8a2008-09-29 23:02:41 -04008#include <linux/ring_buffer.h>
Pekka Paalanenbd8ac682008-05-12 21:20:57 +02009#include <linux/mmiotrace.h>
Steven Rostedt4e5292e2009-09-12 19:26:21 -040010#include <linux/tracepoint.h>
Frédéric Weisbeckerd13744c2008-09-23 11:32:08 +010011#include <linux/ftrace.h>
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +020012#include <linux/hw_breakpoint.h>
Steven Rostedt95045042009-04-11 12:59:57 -040013#include <linux/trace_seq.h>
Steven Rostedt97f20252009-04-13 11:20:49 -040014#include <linux/ftrace_event.h>
Steven Rostedt95045042009-04-11 12:59:57 -040015
Thomas Gleixner72829bc2008-05-23 21:37:28 +020016enum trace_type {
17 __TRACE_FIRST_TYPE = 0,
18
19 TRACE_FN,
20 TRACE_CTX,
21 TRACE_WAKE,
22 TRACE_STACK,
Steven Rostedtdd0e5452008-08-01 12:26:41 -040023 TRACE_PRINT,
Frederic Weisbecker48ead022009-03-12 18:24:49 +010024 TRACE_BPRINT,
Thomas Gleixner72829bc2008-05-23 21:37:28 +020025 TRACE_SPECIAL,
Pekka Paalanenbd8ac682008-05-12 21:20:57 +020026 TRACE_MMIO_RW,
27 TRACE_MMIO_MAP,
Steven Rostedt9f029e82008-11-12 15:24:24 -050028 TRACE_BRANCH,
Frederic Weisbecker287b6e62008-11-26 00:57:25 +010029 TRACE_GRAPH_RET,
30 TRACE_GRAPH_ENT,
Török Edwin02b67512008-11-22 13:28:47 +020031 TRACE_USER_STACK,
Arnaldo Carvalho de Meloc71a8962009-01-23 12:06:27 -020032 TRACE_BLK,
Thomas Gleixner72829bc2008-05-23 21:37:28 +020033
Steven Rostedtf0868d12008-12-23 23:24:12 -050034 __TRACE_LAST_TYPE,
Thomas Gleixner72829bc2008-05-23 21:37:28 +020035};
36
Frederic Weisbecker36994e52008-12-29 13:42:23 -080037
Steven Rostedt0a1c49d2009-09-12 19:17:15 -040038#undef __field
39#define __field(type, item) type item;
Frederic Weisbecker36994e52008-12-29 13:42:23 -080040
Steven Rostedtd7315092009-09-12 19:22:23 -040041#undef __field_struct
42#define __field_struct(type, item) __field(type, item)
43
44#undef __field_desc
45#define __field_desc(type, container, item)
46
Steven Rostedt0a1c49d2009-09-12 19:17:15 -040047#undef __array
48#define __array(type, item, size) type item[size];
49
Steven Rostedtd7315092009-09-12 19:22:23 -040050#undef __array_desc
51#define __array_desc(type, container, item, size)
52
Steven Rostedt0a1c49d2009-09-12 19:17:15 -040053#undef __dynamic_array
54#define __dynamic_array(type, item) type item[];
55
56#undef F_STRUCT
57#define F_STRUCT(args...) args
58
59#undef FTRACE_ENTRY
60#define FTRACE_ENTRY(name, struct_name, id, tstruct, print) \
61 struct struct_name { \
62 struct trace_entry ent; \
63 tstruct \
64 }
65
66#undef TP_ARGS
67#define TP_ARGS(args...) args
68
69#undef FTRACE_ENTRY_DUP
70#define FTRACE_ENTRY_DUP(name, name_struct, id, tstruct, printk)
71
72#include "trace_entries.h"
73
74/*
75 * syscalls are special, and need special handling, this is why
76 * they are not included in trace_entries.h
77 */
Frederic Weisbeckerbed1ffc2009-03-13 15:42:11 +010078struct syscall_trace_enter {
79 struct trace_entry ent;
80 int nr;
81 unsigned long args[];
82};
83
84struct syscall_trace_exit {
85 struct trace_entry ent;
86 int nr;
Tom Zanussi99df5a62009-11-25 01:14:59 -060087 long ret;
Frederic Weisbeckerbed1ffc2009-03-13 15:42:11 +010088};
89
Masami Hiramatsu93ccae72010-04-12 13:17:08 -040090struct kprobe_trace_entry_head {
Masami Hiramatsu413d37d2009-08-13 16:35:11 -040091 struct trace_entry ent;
92 unsigned long ip;
Masami Hiramatsu413d37d2009-08-13 16:35:11 -040093};
94
Masami Hiramatsu93ccae72010-04-12 13:17:08 -040095struct kretprobe_trace_entry_head {
Masami Hiramatsu413d37d2009-08-13 16:35:11 -040096 struct trace_entry ent;
97 unsigned long func;
98 unsigned long ret_ip;
Masami Hiramatsu413d37d2009-08-13 16:35:11 -040099};
100
Steven Rostedtdd0e5452008-08-01 12:26:41 -0400101/*
Pekka Paalanenfc5e27a2008-09-16 22:02:27 +0300102 * trace_flag_type is an enumeration that holds different
103 * states when a trace occurs. These are:
Steven Rostedt92444892008-10-24 09:42:59 -0400104 * IRQS_OFF - interrupts were disabled
Ingo Molnar9de36822009-03-06 17:52:03 +0100105 * IRQS_NOSUPPORT - arch does not support irqs_disabled_flags
Li Zefanbd9cfca2009-09-10 09:34:19 +0800106 * NEED_RESCHED - reschedule is requested
Steven Rostedt92444892008-10-24 09:42:59 -0400107 * HARDIRQ - inside an interrupt handler
108 * SOFTIRQ - inside a softirq handler
Pekka Paalanenfc5e27a2008-09-16 22:02:27 +0300109 */
110enum trace_flag_type {
111 TRACE_FLAG_IRQS_OFF = 0x01,
Steven Rostedt92444892008-10-24 09:42:59 -0400112 TRACE_FLAG_IRQS_NOSUPPORT = 0x02,
113 TRACE_FLAG_NEED_RESCHED = 0x04,
114 TRACE_FLAG_HARDIRQ = 0x08,
115 TRACE_FLAG_SOFTIRQ = 0x10,
Pekka Paalanenfc5e27a2008-09-16 22:02:27 +0300116};
117
Pekka Paalanen5bf9a1e2008-09-16 22:06:42 +0300118#define TRACE_BUF_SIZE 1024
Steven Rostedtbc0c38d2008-05-12 21:20:42 +0200119
120/*
121 * The CPU trace array - it consists of thousands of trace entries
122 * plus some other descriptor data: (for example which task started
123 * the trace, etc.)
124 */
125struct trace_array_cpu {
Steven Rostedtbc0c38d2008-05-12 21:20:42 +0200126 atomic_t disabled;
Steven Rostedt2cadf912008-12-01 22:20:19 -0500127 void *buffer_page; /* ring buffer spare */
Ingo Molnar4e3c3332008-05-12 21:20:45 +0200128
Steven Rostedtbc0c38d2008-05-12 21:20:42 +0200129 unsigned long saved_latency;
130 unsigned long critical_start;
131 unsigned long critical_end;
132 unsigned long critical_sequence;
133 unsigned long nice;
134 unsigned long policy;
135 unsigned long rt_priority;
Steven Rostedt2f26ebd2009-09-01 11:06:29 -0400136 unsigned long skipped_entries;
Steven Rostedtbc0c38d2008-05-12 21:20:42 +0200137 cycle_t preempt_timestamp;
138 pid_t pid;
139 uid_t uid;
140 char comm[TASK_COMM_LEN];
141};
142
Steven Rostedtbc0c38d2008-05-12 21:20:42 +0200143/*
144 * The trace array - an array of per-CPU trace arrays. This is the
145 * highest level data structure that individual tracers deal with.
146 * They have on/off state as well:
147 */
148struct trace_array {
Steven Rostedt3928a8a2008-09-29 23:02:41 -0400149 struct ring_buffer *buffer;
Steven Rostedtbc0c38d2008-05-12 21:20:42 +0200150 unsigned long entries;
Steven Rostedtbc0c38d2008-05-12 21:20:42 +0200151 int cpu;
152 cycle_t time_start;
Steven Rostedtb3806b42008-05-12 21:20:46 +0200153 struct task_struct *waiter;
Steven Rostedtbc0c38d2008-05-12 21:20:42 +0200154 struct trace_array_cpu *data[NR_CPUS];
155};
156
Steven Rostedt7104f302008-10-01 10:52:51 -0400157#define FTRACE_CMP_TYPE(var, type) \
158 __builtin_types_compatible_p(typeof(var), type *)
159
160#undef IF_ASSIGN
161#define IF_ASSIGN(var, entry, etype, id) \
162 if (FTRACE_CMP_TYPE(var, etype)) { \
163 var = (typeof(var))(entry); \
164 WARN_ON(id && (entry)->type != id); \
165 break; \
166 }
167
168/* Will cause compile errors if type is not found. */
169extern void __ftrace_bad_type(void);
170
171/*
172 * The trace_assign_type is a verifier that the entry type is
173 * the same as the type being assigned. To add new types simply
174 * add a line with the following format:
175 *
176 * IF_ASSIGN(var, ent, type, id);
177 *
178 * Where "type" is the trace type that includes the trace_entry
179 * as the "ent" item. And "id" is the trace identifier that is
180 * used in the trace_type enum.
181 *
182 * If the type can have more than one id, then use zero.
183 */
184#define trace_assign_type(var, ent) \
185 do { \
186 IF_ASSIGN(var, ent, struct ftrace_entry, TRACE_FN); \
187 IF_ASSIGN(var, ent, struct ctx_switch_entry, 0); \
Steven Rostedt7104f302008-10-01 10:52:51 -0400188 IF_ASSIGN(var, ent, struct stack_entry, TRACE_STACK); \
Török Edwin02b67512008-11-22 13:28:47 +0200189 IF_ASSIGN(var, ent, struct userstack_entry, TRACE_USER_STACK);\
Steven Rostedt7104f302008-10-01 10:52:51 -0400190 IF_ASSIGN(var, ent, struct print_entry, TRACE_PRINT); \
Frederic Weisbecker48ead022009-03-12 18:24:49 +0100191 IF_ASSIGN(var, ent, struct bprint_entry, TRACE_BPRINT); \
Steven Rostedt7104f302008-10-01 10:52:51 -0400192 IF_ASSIGN(var, ent, struct special_entry, 0); \
193 IF_ASSIGN(var, ent, struct trace_mmiotrace_rw, \
194 TRACE_MMIO_RW); \
195 IF_ASSIGN(var, ent, struct trace_mmiotrace_map, \
196 TRACE_MMIO_MAP); \
Steven Rostedt9f029e82008-11-12 15:24:24 -0500197 IF_ASSIGN(var, ent, struct trace_branch, TRACE_BRANCH); \
Frederic Weisbecker287b6e62008-11-26 00:57:25 +0100198 IF_ASSIGN(var, ent, struct ftrace_graph_ent_entry, \
199 TRACE_GRAPH_ENT); \
200 IF_ASSIGN(var, ent, struct ftrace_graph_ret_entry, \
201 TRACE_GRAPH_RET); \
Steven Rostedt7104f302008-10-01 10:52:51 -0400202 __ftrace_bad_type(); \
203 } while (0)
Frederic Weisbecker2c4f0352008-09-29 20:18:34 +0200204
Frederic Weisbeckeradf9f192008-11-17 19:23:42 +0100205/*
206 * An option specific to a tracer. This is a boolean value.
207 * The bit is the bit index that sets its value on the
208 * flags value in struct tracer_flags.
209 */
210struct tracer_opt {
Ingo Molnar9de36822009-03-06 17:52:03 +0100211 const char *name; /* Will appear on the trace_options file */
212 u32 bit; /* Mask assigned in val field in tracer_flags */
Frederic Weisbeckeradf9f192008-11-17 19:23:42 +0100213};
214
215/*
216 * The set of specific options for a tracer. Your tracer
217 * have to set the initial value of the flags val.
218 */
219struct tracer_flags {
220 u32 val;
Ingo Molnar9de36822009-03-06 17:52:03 +0100221 struct tracer_opt *opts;
Frederic Weisbeckeradf9f192008-11-17 19:23:42 +0100222};
223
224/* Makes more easy to define a tracer opt */
225#define TRACER_OPT(s, b) .name = #s, .bit = b
226
Frederic Weisbecker034939b2009-01-08 10:03:56 -0800227
Frederic Weisbecker6eaaa5d2009-02-11 02:25:00 +0100228/**
229 * struct tracer - a specific tracer and its callbacks to interact with debugfs
230 * @name: the name chosen to select it on the available_tracers file
231 * @init: called when one switches to this tracer (echo name > current_tracer)
232 * @reset: called when one switches to another tracer
233 * @start: called when tracing is unpaused (echo 1 > tracing_enabled)
234 * @stop: called when tracing is paused (echo 0 > tracing_enabled)
235 * @open: called when the trace file is opened
236 * @pipe_open: called when the trace_pipe file is opened
237 * @wait_pipe: override how the user waits for traces on trace_pipe
238 * @close: called when the trace file is released
Steven Rostedtc521efd2009-12-07 09:06:24 -0500239 * @pipe_close: called when the trace_pipe file is released
Frederic Weisbecker6eaaa5d2009-02-11 02:25:00 +0100240 * @read: override the default read callback on trace_pipe
241 * @splice_read: override the default splice_read callback on trace_pipe
242 * @selftest: selftest to run on boot (see trace_selftest.c)
243 * @print_headers: override the first lines that describe your columns
244 * @print_line: callback that prints a trace
245 * @set_flag: signals one of your private flags changed (trace_options file)
246 * @flags: your private flags
Steven Rostedtbc0c38d2008-05-12 21:20:42 +0200247 */
248struct tracer {
249 const char *name;
Frederic Weisbecker1c800252008-11-16 05:57:26 +0100250 int (*init)(struct trace_array *tr);
Steven Rostedtbc0c38d2008-05-12 21:20:42 +0200251 void (*reset)(struct trace_array *tr);
Steven Rostedt90369902008-11-05 16:05:44 -0500252 void (*start)(struct trace_array *tr);
253 void (*stop)(struct trace_array *tr);
Steven Rostedtbc0c38d2008-05-12 21:20:42 +0200254 void (*open)(struct trace_iterator *iter);
Steven Rostedt107bad82008-05-12 21:21:01 +0200255 void (*pipe_open)(struct trace_iterator *iter);
Frederic Weisbecker6eaaa5d2009-02-11 02:25:00 +0100256 void (*wait_pipe)(struct trace_iterator *iter);
Steven Rostedtbc0c38d2008-05-12 21:20:42 +0200257 void (*close)(struct trace_iterator *iter);
Steven Rostedtc521efd2009-12-07 09:06:24 -0500258 void (*pipe_close)(struct trace_iterator *iter);
Steven Rostedt107bad82008-05-12 21:21:01 +0200259 ssize_t (*read)(struct trace_iterator *iter,
260 struct file *filp, char __user *ubuf,
261 size_t cnt, loff_t *ppos);
Eduard - Gabriel Munteanu3c568192009-02-09 08:15:56 +0200262 ssize_t (*splice_read)(struct trace_iterator *iter,
263 struct file *filp,
264 loff_t *ppos,
265 struct pipe_inode_info *pipe,
266 size_t len,
267 unsigned int flags);
Steven Rostedt60a11772008-05-12 21:20:44 +0200268#ifdef CONFIG_FTRACE_STARTUP_TEST
269 int (*selftest)(struct tracer *trace,
270 struct trace_array *tr);
271#endif
Markus Metzger8bba1bf2008-11-25 09:12:31 +0100272 void (*print_header)(struct seq_file *m);
Frederic Weisbecker2c4f0352008-09-29 20:18:34 +0200273 enum print_line_t (*print_line)(struct trace_iterator *iter);
Frederic Weisbeckeradf9f192008-11-17 19:23:42 +0100274 /* If you handled the flag setting, return 0 */
275 int (*set_flag)(u32 old_flags, u32 bit, int set);
Steven Rostedtbc0c38d2008-05-12 21:20:42 +0200276 struct tracer *next;
277 int print_max;
Ingo Molnar9de36822009-03-06 17:52:03 +0100278 struct tracer_flags *flags;
KOSAKI Motohiroef710e12010-07-01 14:34:35 +0900279 int use_max_tr;
Steven Rostedtbc0c38d2008-05-12 21:20:42 +0200280};
281
Steven Rostedtf9520752009-03-02 14:04:40 -0500282
Frederic Weisbeckerb04cc6b2009-02-25 03:22:28 +0100283#define TRACE_PIPE_ALL_CPU -1
284
Arnaldo Carvalho de Melob6f11df2009-02-05 18:02:00 -0200285int tracer_init(struct tracer *t, struct trace_array *tr);
Steven Rostedt90369902008-11-05 16:05:44 -0500286int tracing_is_enabled(void);
Pekka Paalanen45dcd8b2008-09-16 21:56:41 +0300287void trace_wake_up(void);
Steven Rostedt3928a8a2008-09-29 23:02:41 -0400288void tracing_reset(struct trace_array *tr, int cpu);
Pekka J Enberg213cc062008-12-19 12:08:39 +0200289void tracing_reset_online_cpus(struct trace_array *tr);
Steven Rostedt9456f0f2009-05-06 21:54:09 -0400290void tracing_reset_current(int cpu);
291void tracing_reset_current_online_cpus(void);
Steven Rostedtbc0c38d2008-05-12 21:20:42 +0200292int tracing_open_generic(struct inode *inode, struct file *filp);
Frederic Weisbecker5452af62009-03-27 00:25:38 +0100293struct dentry *trace_create_file(const char *name,
294 mode_t mode,
295 struct dentry *parent,
296 void *data,
297 const struct file_operations *fops);
298
Steven Rostedtbc0c38d2008-05-12 21:20:42 +0200299struct dentry *tracing_init_dentry(void);
Ingo Molnard618b3e2008-05-12 21:20:49 +0200300void init_tracer_sysprof_debugfs(struct dentry *d_tracer);
301
Arnaldo Carvalho de Melo51a763d2009-02-05 16:14:13 -0200302struct ring_buffer_event;
303
Steven Rostedte77405a2009-09-02 14:17:06 -0400304struct ring_buffer_event *
305trace_buffer_lock_reserve(struct ring_buffer *buffer,
306 int type,
307 unsigned long len,
308 unsigned long flags,
309 int pc);
310void trace_buffer_unlock_commit(struct ring_buffer *buffer,
Arnaldo Carvalho de Melo51a763d2009-02-05 16:14:13 -0200311 struct ring_buffer_event *event,
312 unsigned long flags, int pc);
313
Pekka Paalanen45dcd8b2008-09-16 21:56:41 +0300314struct trace_entry *tracing_get_trace_entry(struct trace_array *tr,
315 struct trace_array_cpu *data);
Frederic Weisbeckerc4a8e8b2009-02-02 20:29:21 -0200316
317struct trace_entry *trace_find_next_entry(struct trace_iterator *iter,
318 int *ent_cpu, u64 *ent_ts);
319
Frederic Weisbecker6eaaa5d2009-02-11 02:25:00 +0100320void default_wait_pipe(struct trace_iterator *iter);
321void poll_wait_pipe(struct trace_iterator *iter);
322
Steven Rostedtbc0c38d2008-05-12 21:20:42 +0200323void ftrace(struct trace_array *tr,
324 struct trace_array_cpu *data,
325 unsigned long ip,
326 unsigned long parent_ip,
Steven Rostedt38697052008-10-01 13:14:09 -0400327 unsigned long flags, int pc);
Steven Rostedtbc0c38d2008-05-12 21:20:42 +0200328void tracing_sched_switch_trace(struct trace_array *tr,
Steven Rostedtbc0c38d2008-05-12 21:20:42 +0200329 struct task_struct *prev,
330 struct task_struct *next,
Steven Rostedt38697052008-10-01 13:14:09 -0400331 unsigned long flags, int pc);
Ingo Molnar57422792008-05-12 21:20:51 +0200332
333void tracing_sched_wakeup_trace(struct trace_array *tr,
Ingo Molnar57422792008-05-12 21:20:51 +0200334 struct task_struct *wakee,
335 struct task_struct *cur,
Steven Rostedt38697052008-10-01 13:14:09 -0400336 unsigned long flags, int pc);
Ingo Molnarf0a920d2008-05-12 21:20:47 +0200337void trace_special(struct trace_array *tr,
338 struct trace_array_cpu *data,
339 unsigned long arg1,
340 unsigned long arg2,
Steven Rostedt38697052008-10-01 13:14:09 -0400341 unsigned long arg3, int pc);
Steven Rostedt6fb44b72008-05-12 21:20:49 +0200342void trace_function(struct trace_array *tr,
Steven Rostedt6fb44b72008-05-12 21:20:49 +0200343 unsigned long ip,
344 unsigned long parent_ip,
Steven Rostedt38697052008-10-01 13:14:09 -0400345 unsigned long flags, int pc);
Jiri Olsa62b915f2010-04-02 19:01:22 +0200346void trace_default_header(struct seq_file *m);
347void print_trace_header(struct seq_file *m, struct trace_iterator *iter);
348int trace_empty(struct trace_iterator *iter);
Steven Rostedtbc0c38d2008-05-12 21:20:42 +0200349
Frederic Weisbecker287b6e62008-11-26 00:57:25 +0100350void trace_graph_return(struct ftrace_graph_ret *trace);
Steven Rostedte49dc192008-12-02 23:50:05 -0500351int trace_graph_entry(struct ftrace_graph_ent *trace);
Frederic Weisbecker1a0799a2009-07-29 18:59:58 +0200352void set_graph_array(struct trace_array *tr);
Markus Metzger1e9b51c2008-11-25 09:24:15 +0100353
Steven Rostedt41bc8142008-05-22 11:49:22 -0400354void tracing_start_cmdline_record(void);
355void tracing_stop_cmdline_record(void);
Steven Rostedte168e052008-11-07 22:36:02 -0500356void tracing_sched_switch_assign_trace(struct trace_array *tr);
357void tracing_stop_sched_switch_record(void);
358void tracing_start_sched_switch_record(void);
Steven Rostedtbc0c38d2008-05-12 21:20:42 +0200359int register_tracer(struct tracer *type);
360void unregister_tracer(struct tracer *type);
Carsten Emdeb5130b12009-09-13 01:43:07 +0200361int is_tracing_stopped(void);
Steven Rostedtbc0c38d2008-05-12 21:20:42 +0200362
363extern unsigned long nsecs_to_usecs(unsigned long nsecs);
364
Tim Bird0e950172010-02-25 15:36:43 -0800365extern unsigned long tracing_thresh;
366
Steven Rostedt5d4a9db2009-08-27 16:52:21 -0400367#ifdef CONFIG_TRACER_MAX_TRACE
Steven Rostedtbc0c38d2008-05-12 21:20:42 +0200368extern unsigned long tracing_max_latency;
Steven Rostedtbc0c38d2008-05-12 21:20:42 +0200369
370void update_max_tr(struct trace_array *tr, struct task_struct *tsk, int cpu);
371void update_max_tr_single(struct trace_array *tr,
372 struct task_struct *tsk, int cpu);
Steven Rostedt5d4a9db2009-08-27 16:52:21 -0400373#endif /* CONFIG_TRACER_MAX_TRACE */
Steven Rostedtbc0c38d2008-05-12 21:20:42 +0200374
Frederic Weisbeckerc0a0d0d2009-07-29 17:51:13 +0200375#ifdef CONFIG_STACKTRACE
Steven Rostedte77405a2009-09-02 14:17:06 -0400376void ftrace_trace_stack(struct ring_buffer *buffer, unsigned long flags,
Frederic Weisbeckerc0a0d0d2009-07-29 17:51:13 +0200377 int skip, int pc);
378
Steven Rostedte77405a2009-09-02 14:17:06 -0400379void ftrace_trace_userstack(struct ring_buffer *buffer, unsigned long flags,
Frederic Weisbeckerc0a0d0d2009-07-29 17:51:13 +0200380 int pc);
381
382void __trace_stack(struct trace_array *tr, unsigned long flags, int skip,
383 int pc);
384#else
Li Zefane1f79922010-05-10 11:23:00 +0800385static inline void ftrace_trace_stack(struct ring_buffer *buffer,
Frederic Weisbeckerc0a0d0d2009-07-29 17:51:13 +0200386 unsigned long flags, int skip, int pc)
387{
388}
389
Li Zefane1f79922010-05-10 11:23:00 +0800390static inline void ftrace_trace_userstack(struct ring_buffer *buffer,
Frederic Weisbeckerc0a0d0d2009-07-29 17:51:13 +0200391 unsigned long flags, int pc)
392{
393}
394
395static inline void __trace_stack(struct trace_array *tr, unsigned long flags,
396 int skip, int pc)
397{
398}
399#endif /* CONFIG_STACKTRACE */
Steven Rostedt53614992009-01-15 19:12:40 -0500400
Ingo Molnare309b412008-05-12 21:20:51 +0200401extern cycle_t ftrace_now(int cpu);
Steven Rostedtbc0c38d2008-05-12 21:20:42 +0200402
Steven Rostedt4ca53082009-03-16 19:20:15 -0400403extern void trace_find_cmdline(int pid, char comm[]);
Ingo Molnarf7d48cb2008-12-29 13:02:17 +0100404
Steven Rostedtbc0c38d2008-05-12 21:20:42 +0200405#ifdef CONFIG_DYNAMIC_FTRACE
406extern unsigned long ftrace_update_tot_cnt;
Steven Rostedtd05cdb22008-05-12 21:20:54 +0200407#define DYN_FTRACE_TEST_NAME trace_selftest_dynamic_test_func
408extern int DYN_FTRACE_TEST_NAME(void);
Steven Rostedtbc0c38d2008-05-12 21:20:42 +0200409#endif
410
Li Zefan020e5f82009-07-01 10:47:05 +0800411extern int ring_buffer_expanded;
412extern bool tracing_selftest_disabled;
Christoph Lameter9288f992009-10-07 19:17:45 -0400413DECLARE_PER_CPU(int, ftrace_cpu_disabled);
Li Zefan020e5f82009-07-01 10:47:05 +0800414
Steven Rostedt60a11772008-05-12 21:20:44 +0200415#ifdef CONFIG_FTRACE_STARTUP_TEST
Steven Rostedt60a11772008-05-12 21:20:44 +0200416extern int trace_selftest_startup_function(struct tracer *trace,
417 struct trace_array *tr);
Frederic Weisbecker7447dce2009-02-07 21:33:57 +0100418extern int trace_selftest_startup_function_graph(struct tracer *trace,
419 struct trace_array *tr);
Steven Rostedt60a11772008-05-12 21:20:44 +0200420extern int trace_selftest_startup_irqsoff(struct tracer *trace,
421 struct trace_array *tr);
Steven Rostedt60a11772008-05-12 21:20:44 +0200422extern int trace_selftest_startup_preemptoff(struct tracer *trace,
423 struct trace_array *tr);
Steven Rostedt60a11772008-05-12 21:20:44 +0200424extern int trace_selftest_startup_preemptirqsoff(struct tracer *trace,
425 struct trace_array *tr);
Steven Rostedt60a11772008-05-12 21:20:44 +0200426extern int trace_selftest_startup_wakeup(struct tracer *trace,
427 struct trace_array *tr);
Steven Noonanfb1b6d82008-09-19 03:06:43 -0700428extern int trace_selftest_startup_nop(struct tracer *trace,
429 struct trace_array *tr);
Steven Rostedt60a11772008-05-12 21:20:44 +0200430extern int trace_selftest_startup_sched_switch(struct tracer *trace,
431 struct trace_array *tr);
Ingo Molnara6dd24f2008-05-12 21:20:47 +0200432extern int trace_selftest_startup_sysprof(struct tracer *trace,
433 struct trace_array *tr);
Steven Rostedt80e5ea42008-11-12 15:24:24 -0500434extern int trace_selftest_startup_branch(struct tracer *trace,
435 struct trace_array *tr);
Steven Rostedt60a11772008-05-12 21:20:44 +0200436#endif /* CONFIG_FTRACE_STARTUP_TEST */
437
Ingo Molnarc7aafc52008-05-12 21:20:45 +0200438extern void *head_page(struct trace_array_cpu *data);
Lai Jiangshancf8e3472009-03-30 13:48:00 +0800439extern unsigned long long ns2usecs(cycle_t nsec);
Frederic Weisbecker1fd8f2a2008-12-03 23:45:11 +0100440extern int
Steven Rostedt40ce74f2009-03-19 14:03:53 -0400441trace_vbprintk(unsigned long ip, const char *fmt, va_list args);
Frederic Weisbecker48ead022009-03-12 18:24:49 +0100442extern int
Steven Rostedt40ce74f2009-03-19 14:03:53 -0400443trace_vprintk(unsigned long ip, const char *fmt, va_list args);
Steven Rostedt659372d2009-09-03 19:11:07 -0400444extern int
445trace_array_vprintk(struct trace_array *tr,
446 unsigned long ip, const char *fmt, va_list args);
447int trace_array_printk(struct trace_array *tr,
448 unsigned long ip, const char *fmt, ...);
Ingo Molnarc7aafc52008-05-12 21:20:45 +0200449
Ingo Molnar4e655512008-05-12 21:20:52 +0200450extern unsigned long trace_flags;
451
Zhaolei5079f322009-08-25 16:12:56 +0800452extern int trace_clock_id;
453
Frederic Weisbecker15e6cb32008-11-11 07:14:25 +0100454/* Standard output formatting function used for function return traces */
Frederic Weisbeckerfb526072008-11-25 21:07:04 +0100455#ifdef CONFIG_FUNCTION_GRAPH_TRACER
Jiri Olsa62b915f2010-04-02 19:01:22 +0200456
457/* Flag options */
458#define TRACE_GRAPH_PRINT_OVERRUN 0x1
459#define TRACE_GRAPH_PRINT_CPU 0x2
460#define TRACE_GRAPH_PRINT_OVERHEAD 0x4
461#define TRACE_GRAPH_PRINT_PROC 0x8
462#define TRACE_GRAPH_PRINT_DURATION 0x10
463#define TRACE_GRAPH_PRINT_ABS_TIME 0x20
464
Jiri Olsad7a8d9e2010-04-02 19:01:21 +0200465extern enum print_line_t
466print_graph_function_flags(struct trace_iterator *iter, u32 flags);
467extern void print_graph_headers_flags(struct seq_file *s, u32 flags);
Steven Rostedt0706f1c2009-03-23 23:12:58 -0400468extern enum print_line_t
469trace_print_graph_duration(unsigned long long duration, struct trace_seq *s);
Jiri Olsa62b915f2010-04-02 19:01:22 +0200470extern void graph_trace_open(struct trace_iterator *iter);
471extern void graph_trace_close(struct trace_iterator *iter);
472extern int __trace_graph_entry(struct trace_array *tr,
473 struct ftrace_graph_ent *trace,
474 unsigned long flags, int pc);
475extern void __trace_graph_return(struct trace_array *tr,
476 struct ftrace_graph_ret *trace,
477 unsigned long flags, int pc);
478
Steven Rostedtea4e2bc2008-12-03 15:36:57 -0500479
480#ifdef CONFIG_DYNAMIC_FTRACE
481/* TODO: make this variable */
482#define FTRACE_GRAPH_MAX_FUNCS 32
Li Zefanc7c6b1f2010-02-10 15:43:04 +0800483extern int ftrace_graph_filter_enabled;
Steven Rostedtea4e2bc2008-12-03 15:36:57 -0500484extern int ftrace_graph_count;
485extern unsigned long ftrace_graph_funcs[FTRACE_GRAPH_MAX_FUNCS];
486
487static inline int ftrace_graph_addr(unsigned long addr)
488{
489 int i;
490
Li Zefanc7c6b1f2010-02-10 15:43:04 +0800491 if (!ftrace_graph_filter_enabled)
Steven Rostedtea4e2bc2008-12-03 15:36:57 -0500492 return 1;
493
494 for (i = 0; i < ftrace_graph_count; i++) {
495 if (addr == ftrace_graph_funcs[i])
496 return 1;
497 }
498
499 return 0;
500}
Frederic Weisbecker15e6cb32008-11-11 07:14:25 +0100501#else
Ingo Molnar6b253932008-12-04 09:18:28 +0100502static inline int ftrace_graph_addr(unsigned long addr)
503{
504 return 1;
Steven Rostedtea4e2bc2008-12-03 15:36:57 -0500505}
506#endif /* CONFIG_DYNAMIC_FTRACE */
Steven Rostedtea4e2bc2008-12-03 15:36:57 -0500507#else /* CONFIG_FUNCTION_GRAPH_TRACER */
Frederic Weisbecker15e6cb32008-11-11 07:14:25 +0100508static inline enum print_line_t
Jiri Olsad7a8d9e2010-04-02 19:01:21 +0200509print_graph_function_flags(struct trace_iterator *iter, u32 flags)
Frederic Weisbecker15e6cb32008-11-11 07:14:25 +0100510{
511 return TRACE_TYPE_UNHANDLED;
512}
Steven Rostedtea4e2bc2008-12-03 15:36:57 -0500513#endif /* CONFIG_FUNCTION_GRAPH_TRACER */
Frederic Weisbecker15e6cb32008-11-11 07:14:25 +0100514
jolsa@redhat.com756d17e2009-10-13 16:33:52 -0400515extern struct list_head ftrace_pids;
Steven Rostedt804a6852008-12-03 15:36:59 -0500516
Paul Mundt1155de42009-06-25 14:30:12 +0900517#ifdef CONFIG_FUNCTION_TRACER
Steven Rostedt804a6852008-12-03 15:36:59 -0500518static inline int ftrace_trace_task(struct task_struct *task)
519{
jolsa@redhat.com756d17e2009-10-13 16:33:52 -0400520 if (list_empty(&ftrace_pids))
Steven Rostedt804a6852008-12-03 15:36:59 -0500521 return 1;
522
523 return test_tsk_trace_trace(task);
524}
Paul Mundt1155de42009-06-25 14:30:12 +0900525#else
526static inline int ftrace_trace_task(struct task_struct *task)
527{
528 return 1;
529}
530#endif
Steven Rostedt804a6852008-12-03 15:36:59 -0500531
Steven Rostedt4fcdae82008-05-12 21:21:00 +0200532/*
jolsa@redhat.comb63f39e2009-09-11 17:29:27 +0200533 * struct trace_parser - servers for reading the user input separated by spaces
534 * @cont: set if the input is not complete - no final space char was found
535 * @buffer: holds the parsed user input
Daniel Mack1537a362010-01-29 15:57:49 +0800536 * @idx: user input length
jolsa@redhat.comb63f39e2009-09-11 17:29:27 +0200537 * @size: buffer size
538 */
539struct trace_parser {
540 bool cont;
541 char *buffer;
542 unsigned idx;
543 unsigned size;
544};
545
546static inline bool trace_parser_loaded(struct trace_parser *parser)
547{
548 return (parser->idx != 0);
549}
550
551static inline bool trace_parser_cont(struct trace_parser *parser)
552{
553 return parser->cont;
554}
555
556static inline void trace_parser_clear(struct trace_parser *parser)
557{
558 parser->cont = false;
559 parser->idx = 0;
560}
561
562extern int trace_parser_get_init(struct trace_parser *parser, int size);
563extern void trace_parser_put(struct trace_parser *parser);
564extern int trace_get_user(struct trace_parser *parser, const char __user *ubuf,
565 size_t cnt, loff_t *ppos);
566
567/*
Steven Rostedt4fcdae82008-05-12 21:21:00 +0200568 * trace_iterator_flags is an enumeration that defines bit
569 * positions into trace_flags that controls the output.
570 *
571 * NOTE: These bits must match the trace_options array in
572 * trace.c.
573 */
Ingo Molnar4e655512008-05-12 21:20:52 +0200574enum trace_iterator_flags {
575 TRACE_ITER_PRINT_PARENT = 0x01,
576 TRACE_ITER_SYM_OFFSET = 0x02,
577 TRACE_ITER_SYM_ADDR = 0x04,
578 TRACE_ITER_VERBOSE = 0x08,
579 TRACE_ITER_RAW = 0x10,
580 TRACE_ITER_HEX = 0x20,
581 TRACE_ITER_BIN = 0x40,
582 TRACE_ITER_BLOCK = 0x80,
583 TRACE_ITER_STACKTRACE = 0x100,
Li Zefan2cbafd62009-12-08 11:16:26 +0800584 TRACE_ITER_PRINTK = 0x200,
585 TRACE_ITER_PREEMPTONLY = 0x400,
586 TRACE_ITER_BRANCH = 0x800,
587 TRACE_ITER_ANNOTATE = 0x1000,
588 TRACE_ITER_USERSTACKTRACE = 0x2000,
589 TRACE_ITER_SYM_USEROBJ = 0x4000,
590 TRACE_ITER_PRINTK_MSGONLY = 0x8000,
591 TRACE_ITER_CONTEXT_INFO = 0x10000, /* Print pid/cpu/time */
592 TRACE_ITER_LATENCY_FMT = 0x20000,
593 TRACE_ITER_SLEEP_TIME = 0x40000,
594 TRACE_ITER_GRAPH_TIME = 0x80000,
Li Zefane870e9a2010-07-02 11:07:32 +0800595 TRACE_ITER_RECORD_CMD = 0x100000,
Ingo Molnar4e655512008-05-12 21:20:52 +0200596};
597
Frederic Weisbecker15e6cb32008-11-11 07:14:25 +0100598/*
599 * TRACE_ITER_SYM_MASK masks the options in trace_flags that
600 * control the output of kernel symbols.
601 */
602#define TRACE_ITER_SYM_MASK \
603 (TRACE_ITER_PRINT_PARENT|TRACE_ITER_SYM_OFFSET|TRACE_ITER_SYM_ADDR)
604
Frédéric Weisbecker43a15382008-09-21 20:16:30 +0200605extern struct tracer nop_trace;
606
Steven Rostedt2ed84ee2008-11-12 15:24:24 -0500607#ifdef CONFIG_BRANCH_TRACER
Steven Rostedt9f029e82008-11-12 15:24:24 -0500608extern int enable_branch_tracing(struct trace_array *tr);
609extern void disable_branch_tracing(void);
610static inline int trace_branch_enable(struct trace_array *tr)
Steven Rostedt52f232c2008-11-12 00:14:40 -0500611{
Steven Rostedt9f029e82008-11-12 15:24:24 -0500612 if (trace_flags & TRACE_ITER_BRANCH)
613 return enable_branch_tracing(tr);
Steven Rostedt52f232c2008-11-12 00:14:40 -0500614 return 0;
615}
Steven Rostedt9f029e82008-11-12 15:24:24 -0500616static inline void trace_branch_disable(void)
Steven Rostedt52f232c2008-11-12 00:14:40 -0500617{
618 /* due to races, always disable */
Steven Rostedt9f029e82008-11-12 15:24:24 -0500619 disable_branch_tracing();
Steven Rostedt52f232c2008-11-12 00:14:40 -0500620}
621#else
Steven Rostedt9f029e82008-11-12 15:24:24 -0500622static inline int trace_branch_enable(struct trace_array *tr)
Steven Rostedt52f232c2008-11-12 00:14:40 -0500623{
624 return 0;
625}
Steven Rostedt9f029e82008-11-12 15:24:24 -0500626static inline void trace_branch_disable(void)
Steven Rostedt52f232c2008-11-12 00:14:40 -0500627{
628}
Steven Rostedt2ed84ee2008-11-12 15:24:24 -0500629#endif /* CONFIG_BRANCH_TRACER */
Steven Rostedt52f232c2008-11-12 00:14:40 -0500630
Steven Rostedt1852fcc2009-03-11 14:33:00 -0400631/* set ring buffers to default size if not already done so */
632int tracing_update_buffers(void);
633
Steven Rostedtfd994982009-02-28 02:41:25 -0500634/* trace event type bit fields, not numeric */
635enum {
636 TRACE_EVENT_TYPE_PRINTF = 1,
637 TRACE_EVENT_TYPE_RAW = 2,
638};
639
Tom Zanussicf027f62009-03-22 03:30:39 -0500640struct ftrace_event_field {
641 struct list_head link;
642 char *name;
643 char *type;
Li Zefanaa38e9f2009-08-07 10:33:02 +0800644 int filter_type;
Tom Zanussicf027f62009-03-22 03:30:39 -0500645 int offset;
646 int size;
Tom Zanussia118e4d2009-04-28 03:04:53 -0500647 int is_signed;
Tom Zanussicf027f62009-03-22 03:30:39 -0500648};
649
Tom Zanussi30e673b2009-04-28 03:04:47 -0500650struct event_filter {
651 int n_preds;
652 struct filter_pred **preds;
Tom Zanussi8b372562009-04-28 03:04:59 -0500653 char *filter_string;
Tom Zanussi30e673b2009-04-28 03:04:47 -0500654};
655
Tom Zanussicfb180f2009-03-22 03:31:17 -0500656struct event_subsystem {
657 struct list_head list;
658 const char *name;
659 struct dentry *entry;
Li Zefan1f9963c2009-07-20 10:20:53 +0800660 struct event_filter *filter;
Xiao Guangrongdc82ec98a2009-07-09 16:22:22 +0800661 int nr_events;
Tom Zanussicfb180f2009-03-22 03:31:17 -0500662};
663
Tom Zanussi7ce7e422009-03-22 03:31:04 -0500664struct filter_pred;
Frederic Weisbecker1889d202009-09-24 21:10:44 +0200665struct regex;
Tom Zanussi7ce7e422009-03-22 03:31:04 -0500666
Tom Zanussi8b372562009-04-28 03:04:59 -0500667typedef int (*filter_pred_fn_t) (struct filter_pred *pred, void *event,
668 int val1, int val2);
Tom Zanussi7ce7e422009-03-22 03:31:04 -0500669
Frederic Weisbecker1889d202009-09-24 21:10:44 +0200670typedef int (*regex_match_func)(char *str, struct regex *r, int len);
671
Frederic Weisbecker3f6fe062009-09-24 21:31:51 +0200672enum regex_type {
Li Zefanb0f1a592009-10-15 11:21:12 +0800673 MATCH_FULL = 0,
Frederic Weisbecker3f6fe062009-09-24 21:31:51 +0200674 MATCH_FRONT_ONLY,
675 MATCH_MIDDLE_ONLY,
676 MATCH_END_ONLY,
Tom Zanussi7ce7e422009-03-22 03:31:04 -0500677};
678
Frederic Weisbecker1889d202009-09-24 21:10:44 +0200679struct regex {
680 char pattern[MAX_FILTER_STR_VAL];
681 int len;
682 int field_len;
683 regex_match_func match;
684};
685
Tom Zanussicf027f62009-03-22 03:30:39 -0500686struct filter_pred {
Frederic Weisbecker1889d202009-09-24 21:10:44 +0200687 filter_pred_fn_t fn;
688 u64 val;
689 struct regex regex;
690 char *field_name;
691 int offset;
692 int not;
693 int op;
694 int pop_n;
Steven Rostedtc32e8272009-02-27 19:12:30 -0500695};
696
Li Zefan8728fe52010-05-24 16:22:49 +0800697extern struct list_head ftrace_common_fields;
698
Frederic Weisbecker3f6fe062009-09-24 21:31:51 +0200699extern enum regex_type
700filter_parse_regex(char *buff, int len, char **search, int *not);
Tom Zanussi8b372562009-04-28 03:04:59 -0500701extern void print_event_filter(struct ftrace_event_call *call,
Tom Zanussi4bda2d52009-03-24 02:14:31 -0500702 struct trace_seq *s);
Tom Zanussi8b372562009-04-28 03:04:59 -0500703extern int apply_event_filter(struct ftrace_event_call *call,
704 char *filter_string);
705extern int apply_subsystem_event_filter(struct event_subsystem *system,
706 char *filter_string);
707extern void print_subsystem_event_filter(struct event_subsystem *system,
Tom Zanussiac1adc52009-04-17 00:27:08 -0500708 struct trace_seq *s);
Li Zefanaa38e9f2009-08-07 10:33:02 +0800709extern int filter_assign_type(const char *type);
Tom Zanussi7ce7e422009-03-22 03:31:04 -0500710
Steven Rostedt2e33af02010-04-22 10:35:55 -0400711struct list_head *
712trace_get_fields(struct ftrace_event_call *event_call);
713
Tom Zanussieb02ce02009-04-08 03:15:54 -0500714static inline int
Tom Zanussie1112b42009-03-31 00:48:49 -0500715filter_check_discard(struct ftrace_event_call *call, void *rec,
Tom Zanussieb02ce02009-04-08 03:15:54 -0500716 struct ring_buffer *buffer,
Tom Zanussie1112b42009-03-31 00:48:49 -0500717 struct ring_buffer_event *event)
718{
Steven Rostedt553552c2010-04-23 11:12:36 -0400719 if (unlikely(call->flags & TRACE_EVENT_FL_FILTERED) &&
Li Zefan6fb29152009-10-15 11:21:42 +0800720 !filter_match_preds(call->filter, rec)) {
Tom Zanussieb02ce02009-04-08 03:15:54 -0500721 ring_buffer_discard_commit(buffer, event);
722 return 1;
723 }
724
725 return 0;
Tom Zanussie1112b42009-03-31 00:48:49 -0500726}
727
Li Zefane870e9a2010-07-02 11:07:32 +0800728extern void trace_event_enable_cmd_record(bool enable);
729
Li Zefan20c89282009-05-06 10:33:45 +0800730extern struct mutex event_mutex;
Steven Rostedta59fd602009-04-10 13:52:20 -0400731extern struct list_head ftrace_events;
Peter Zijlstraac199db2009-03-19 20:26:15 +0100732
Steven Rostedte9fb2b62009-03-12 14:19:25 -0400733extern const char *__start___trace_bprintk_fmt[];
734extern const char *__stop___trace_bprintk_fmt[];
735
Steven Rostedt4e5292e2009-09-12 19:26:21 -0400736#undef FTRACE_ENTRY
737#define FTRACE_ENTRY(call, struct_name, id, tstruct, print) \
Jeff Mahoney86c38a32010-02-24 13:59:23 -0500738 extern struct ftrace_event_call \
739 __attribute__((__aligned__(4))) event_##call;
Steven Rostedt4e5292e2009-09-12 19:26:21 -0400740#undef FTRACE_ENTRY_DUP
741#define FTRACE_ENTRY_DUP(call, struct_name, id, tstruct, print) \
742 FTRACE_ENTRY(call, struct_name, id, PARAMS(tstruct), PARAMS(print))
743#include "trace_entries.h"
Tom Zanussie1112b42009-03-31 00:48:49 -0500744
Steven Rostedtbc0c38d2008-05-12 21:20:42 +0200745#endif /* _LINUX_KERNEL_TRACE_H */