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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 Weisbecker3f5ec132008-11-11 23:21:31 +010012#include <trace/boot.h>
Zhaolei02af61b2009-04-10 14:26:18 +080013#include <linux/kmemtrace.h>
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +020014#include <linux/hw_breakpoint.h>
Steven Rostedtbc0c38d2008-05-12 21:20:42 +020015
Steven Rostedt95045042009-04-11 12:59:57 -040016#include <linux/trace_seq.h>
Steven Rostedt97f20252009-04-13 11:20:49 -040017#include <linux/ftrace_event.h>
Steven Rostedt95045042009-04-11 12:59:57 -040018
Thomas Gleixner72829bc2008-05-23 21:37:28 +020019enum trace_type {
20 __TRACE_FIRST_TYPE = 0,
21
22 TRACE_FN,
23 TRACE_CTX,
24 TRACE_WAKE,
25 TRACE_STACK,
Steven Rostedtdd0e5452008-08-01 12:26:41 -040026 TRACE_PRINT,
Frederic Weisbecker48ead022009-03-12 18:24:49 +010027 TRACE_BPRINT,
Thomas Gleixner72829bc2008-05-23 21:37:28 +020028 TRACE_SPECIAL,
Pekka Paalanenbd8ac682008-05-12 21:20:57 +020029 TRACE_MMIO_RW,
30 TRACE_MMIO_MAP,
Steven Rostedt9f029e82008-11-12 15:24:24 -050031 TRACE_BRANCH,
Frederic Weisbecker74239072008-11-11 23:24:42 +010032 TRACE_BOOT_CALL,
33 TRACE_BOOT_RET,
Frederic Weisbecker287b6e62008-11-26 00:57:25 +010034 TRACE_GRAPH_RET,
35 TRACE_GRAPH_ENT,
Török Edwin02b67512008-11-22 13:28:47 +020036 TRACE_USER_STACK,
Frederic Weisbecker36994e52008-12-29 13:42:23 -080037 TRACE_KMEM_ALLOC,
38 TRACE_KMEM_FREE,
Arnaldo Carvalho de Meloc71a8962009-01-23 12:06:27 -020039 TRACE_BLK,
K.Prasad0722db02009-06-01 23:46:40 +053040 TRACE_KSYM,
Thomas Gleixner72829bc2008-05-23 21:37:28 +020041
Steven Rostedtf0868d12008-12-23 23:24:12 -050042 __TRACE_LAST_TYPE,
Thomas Gleixner72829bc2008-05-23 21:37:28 +020043};
44
Eduard - Gabriel Munteanuca2b84cb2009-03-23 15:12:24 +020045enum kmemtrace_type_id {
46 KMEMTRACE_TYPE_KMALLOC = 0, /* kmalloc() or kfree(). */
47 KMEMTRACE_TYPE_CACHE, /* kmem_cache_*(). */
48 KMEMTRACE_TYPE_PAGES, /* __get_free_pages() and friends. */
49};
50
Steven Rostedt0a1c49d2009-09-12 19:17:15 -040051extern struct tracer boot_tracer;
Frederic Weisbecker36994e52008-12-29 13:42:23 -080052
Steven Rostedt0a1c49d2009-09-12 19:17:15 -040053#undef __field
54#define __field(type, item) type item;
Frederic Weisbecker36994e52008-12-29 13:42:23 -080055
Steven Rostedtd7315092009-09-12 19:22:23 -040056#undef __field_struct
57#define __field_struct(type, item) __field(type, item)
58
59#undef __field_desc
60#define __field_desc(type, container, item)
61
Steven Rostedt0a1c49d2009-09-12 19:17:15 -040062#undef __array
63#define __array(type, item, size) type item[size];
64
Steven Rostedtd7315092009-09-12 19:22:23 -040065#undef __array_desc
66#define __array_desc(type, container, item, size)
67
Steven Rostedt0a1c49d2009-09-12 19:17:15 -040068#undef __dynamic_array
69#define __dynamic_array(type, item) type item[];
70
71#undef F_STRUCT
72#define F_STRUCT(args...) args
73
74#undef FTRACE_ENTRY
75#define FTRACE_ENTRY(name, struct_name, id, tstruct, print) \
76 struct struct_name { \
77 struct trace_entry ent; \
78 tstruct \
79 }
80
81#undef TP_ARGS
82#define TP_ARGS(args...) args
83
84#undef FTRACE_ENTRY_DUP
85#define FTRACE_ENTRY_DUP(name, name_struct, id, tstruct, printk)
86
87#include "trace_entries.h"
88
89/*
90 * syscalls are special, and need special handling, this is why
91 * they are not included in trace_entries.h
92 */
Frederic Weisbeckerbed1ffc2009-03-13 15:42:11 +010093struct syscall_trace_enter {
94 struct trace_entry ent;
95 int nr;
96 unsigned long args[];
97};
98
99struct syscall_trace_exit {
100 struct trace_entry ent;
101 int nr;
Tom Zanussi99df5a62009-11-25 01:14:59 -0600102 long ret;
Frederic Weisbeckerbed1ffc2009-03-13 15:42:11 +0100103};
104
Masami Hiramatsu93ccae72010-04-12 13:17:08 -0400105struct kprobe_trace_entry_head {
Masami Hiramatsu413d37d2009-08-13 16:35:11 -0400106 struct trace_entry ent;
107 unsigned long ip;
Masami Hiramatsu413d37d2009-08-13 16:35:11 -0400108};
109
Masami Hiramatsu93ccae72010-04-12 13:17:08 -0400110struct kretprobe_trace_entry_head {
Masami Hiramatsu413d37d2009-08-13 16:35:11 -0400111 struct trace_entry ent;
112 unsigned long func;
113 unsigned long ret_ip;
Masami Hiramatsu413d37d2009-08-13 16:35:11 -0400114};
115
Steven Rostedtdd0e5452008-08-01 12:26:41 -0400116/*
Pekka Paalanenfc5e27a2008-09-16 22:02:27 +0300117 * trace_flag_type is an enumeration that holds different
118 * states when a trace occurs. These are:
Steven Rostedt92444892008-10-24 09:42:59 -0400119 * IRQS_OFF - interrupts were disabled
Ingo Molnar9de36822009-03-06 17:52:03 +0100120 * IRQS_NOSUPPORT - arch does not support irqs_disabled_flags
Li Zefanbd9cfca2009-09-10 09:34:19 +0800121 * NEED_RESCHED - reschedule is requested
Steven Rostedt92444892008-10-24 09:42:59 -0400122 * HARDIRQ - inside an interrupt handler
123 * SOFTIRQ - inside a softirq handler
Pekka Paalanenfc5e27a2008-09-16 22:02:27 +0300124 */
125enum trace_flag_type {
126 TRACE_FLAG_IRQS_OFF = 0x01,
Steven Rostedt92444892008-10-24 09:42:59 -0400127 TRACE_FLAG_IRQS_NOSUPPORT = 0x02,
128 TRACE_FLAG_NEED_RESCHED = 0x04,
129 TRACE_FLAG_HARDIRQ = 0x08,
130 TRACE_FLAG_SOFTIRQ = 0x10,
Pekka Paalanenfc5e27a2008-09-16 22:02:27 +0300131};
132
Pekka Paalanen5bf9a1e2008-09-16 22:06:42 +0300133#define TRACE_BUF_SIZE 1024
Steven Rostedtbc0c38d2008-05-12 21:20:42 +0200134
135/*
136 * The CPU trace array - it consists of thousands of trace entries
137 * plus some other descriptor data: (for example which task started
138 * the trace, etc.)
139 */
140struct trace_array_cpu {
Steven Rostedtbc0c38d2008-05-12 21:20:42 +0200141 atomic_t disabled;
Steven Rostedt2cadf912008-12-01 22:20:19 -0500142 void *buffer_page; /* ring buffer spare */
Ingo Molnar4e3c3332008-05-12 21:20:45 +0200143
Steven Rostedtbc0c38d2008-05-12 21:20:42 +0200144 unsigned long saved_latency;
145 unsigned long critical_start;
146 unsigned long critical_end;
147 unsigned long critical_sequence;
148 unsigned long nice;
149 unsigned long policy;
150 unsigned long rt_priority;
Steven Rostedt2f26ebd2009-09-01 11:06:29 -0400151 unsigned long skipped_entries;
Steven Rostedtbc0c38d2008-05-12 21:20:42 +0200152 cycle_t preempt_timestamp;
153 pid_t pid;
154 uid_t uid;
155 char comm[TASK_COMM_LEN];
156};
157
Steven Rostedtbc0c38d2008-05-12 21:20:42 +0200158/*
159 * The trace array - an array of per-CPU trace arrays. This is the
160 * highest level data structure that individual tracers deal with.
161 * They have on/off state as well:
162 */
163struct trace_array {
Steven Rostedt3928a8a2008-09-29 23:02:41 -0400164 struct ring_buffer *buffer;
Steven Rostedtbc0c38d2008-05-12 21:20:42 +0200165 unsigned long entries;
Steven Rostedtbc0c38d2008-05-12 21:20:42 +0200166 int cpu;
167 cycle_t time_start;
Steven Rostedtb3806b42008-05-12 21:20:46 +0200168 struct task_struct *waiter;
Steven Rostedtbc0c38d2008-05-12 21:20:42 +0200169 struct trace_array_cpu *data[NR_CPUS];
170};
171
Steven Rostedt7104f302008-10-01 10:52:51 -0400172#define FTRACE_CMP_TYPE(var, type) \
173 __builtin_types_compatible_p(typeof(var), type *)
174
175#undef IF_ASSIGN
176#define IF_ASSIGN(var, entry, etype, id) \
177 if (FTRACE_CMP_TYPE(var, etype)) { \
178 var = (typeof(var))(entry); \
179 WARN_ON(id && (entry)->type != id); \
180 break; \
181 }
182
183/* Will cause compile errors if type is not found. */
184extern void __ftrace_bad_type(void);
185
186/*
187 * The trace_assign_type is a verifier that the entry type is
188 * the same as the type being assigned. To add new types simply
189 * add a line with the following format:
190 *
191 * IF_ASSIGN(var, ent, type, id);
192 *
193 * Where "type" is the trace type that includes the trace_entry
194 * as the "ent" item. And "id" is the trace identifier that is
195 * used in the trace_type enum.
196 *
197 * If the type can have more than one id, then use zero.
198 */
199#define trace_assign_type(var, ent) \
200 do { \
201 IF_ASSIGN(var, ent, struct ftrace_entry, TRACE_FN); \
202 IF_ASSIGN(var, ent, struct ctx_switch_entry, 0); \
Steven Rostedt7104f302008-10-01 10:52:51 -0400203 IF_ASSIGN(var, ent, struct stack_entry, TRACE_STACK); \
Török Edwin02b67512008-11-22 13:28:47 +0200204 IF_ASSIGN(var, ent, struct userstack_entry, TRACE_USER_STACK);\
Steven Rostedt7104f302008-10-01 10:52:51 -0400205 IF_ASSIGN(var, ent, struct print_entry, TRACE_PRINT); \
Frederic Weisbecker48ead022009-03-12 18:24:49 +0100206 IF_ASSIGN(var, ent, struct bprint_entry, TRACE_BPRINT); \
Steven Rostedt7104f302008-10-01 10:52:51 -0400207 IF_ASSIGN(var, ent, struct special_entry, 0); \
208 IF_ASSIGN(var, ent, struct trace_mmiotrace_rw, \
209 TRACE_MMIO_RW); \
210 IF_ASSIGN(var, ent, struct trace_mmiotrace_map, \
211 TRACE_MMIO_MAP); \
Frederic Weisbecker74239072008-11-11 23:24:42 +0100212 IF_ASSIGN(var, ent, struct trace_boot_call, TRACE_BOOT_CALL);\
213 IF_ASSIGN(var, ent, struct trace_boot_ret, TRACE_BOOT_RET);\
Steven Rostedt9f029e82008-11-12 15:24:24 -0500214 IF_ASSIGN(var, ent, struct trace_branch, TRACE_BRANCH); \
Frederic Weisbecker287b6e62008-11-26 00:57:25 +0100215 IF_ASSIGN(var, ent, struct ftrace_graph_ent_entry, \
216 TRACE_GRAPH_ENT); \
217 IF_ASSIGN(var, ent, struct ftrace_graph_ret_entry, \
218 TRACE_GRAPH_RET); \
Frederic Weisbecker36994e52008-12-29 13:42:23 -0800219 IF_ASSIGN(var, ent, struct kmemtrace_alloc_entry, \
220 TRACE_KMEM_ALLOC); \
221 IF_ASSIGN(var, ent, struct kmemtrace_free_entry, \
222 TRACE_KMEM_FREE); \
Li Zefandb595042009-07-07 13:52:36 +0800223 IF_ASSIGN(var, ent, struct ksym_trace_entry, TRACE_KSYM);\
Steven Rostedt7104f302008-10-01 10:52:51 -0400224 __ftrace_bad_type(); \
225 } while (0)
Frederic Weisbecker2c4f0352008-09-29 20:18:34 +0200226
Frederic Weisbeckeradf9f192008-11-17 19:23:42 +0100227/*
228 * An option specific to a tracer. This is a boolean value.
229 * The bit is the bit index that sets its value on the
230 * flags value in struct tracer_flags.
231 */
232struct tracer_opt {
Ingo Molnar9de36822009-03-06 17:52:03 +0100233 const char *name; /* Will appear on the trace_options file */
234 u32 bit; /* Mask assigned in val field in tracer_flags */
Frederic Weisbeckeradf9f192008-11-17 19:23:42 +0100235};
236
237/*
238 * The set of specific options for a tracer. Your tracer
239 * have to set the initial value of the flags val.
240 */
241struct tracer_flags {
242 u32 val;
Ingo Molnar9de36822009-03-06 17:52:03 +0100243 struct tracer_opt *opts;
Frederic Weisbeckeradf9f192008-11-17 19:23:42 +0100244};
245
246/* Makes more easy to define a tracer opt */
247#define TRACER_OPT(s, b) .name = #s, .bit = b
248
Frederic Weisbecker034939b2009-01-08 10:03:56 -0800249
Frederic Weisbecker6eaaa5d2009-02-11 02:25:00 +0100250/**
251 * struct tracer - a specific tracer and its callbacks to interact with debugfs
252 * @name: the name chosen to select it on the available_tracers file
253 * @init: called when one switches to this tracer (echo name > current_tracer)
254 * @reset: called when one switches to another tracer
255 * @start: called when tracing is unpaused (echo 1 > tracing_enabled)
256 * @stop: called when tracing is paused (echo 0 > tracing_enabled)
257 * @open: called when the trace file is opened
258 * @pipe_open: called when the trace_pipe file is opened
259 * @wait_pipe: override how the user waits for traces on trace_pipe
260 * @close: called when the trace file is released
Steven Rostedtc521efd2009-12-07 09:06:24 -0500261 * @pipe_close: called when the trace_pipe file is released
Frederic Weisbecker6eaaa5d2009-02-11 02:25:00 +0100262 * @read: override the default read callback on trace_pipe
263 * @splice_read: override the default splice_read callback on trace_pipe
264 * @selftest: selftest to run on boot (see trace_selftest.c)
265 * @print_headers: override the first lines that describe your columns
266 * @print_line: callback that prints a trace
267 * @set_flag: signals one of your private flags changed (trace_options file)
268 * @flags: your private flags
Steven Rostedtbc0c38d2008-05-12 21:20:42 +0200269 */
270struct tracer {
271 const char *name;
Frederic Weisbecker1c800252008-11-16 05:57:26 +0100272 int (*init)(struct trace_array *tr);
Steven Rostedtbc0c38d2008-05-12 21:20:42 +0200273 void (*reset)(struct trace_array *tr);
Steven Rostedt90369902008-11-05 16:05:44 -0500274 void (*start)(struct trace_array *tr);
275 void (*stop)(struct trace_array *tr);
Steven Rostedtbc0c38d2008-05-12 21:20:42 +0200276 void (*open)(struct trace_iterator *iter);
Steven Rostedt107bad82008-05-12 21:21:01 +0200277 void (*pipe_open)(struct trace_iterator *iter);
Frederic Weisbecker6eaaa5d2009-02-11 02:25:00 +0100278 void (*wait_pipe)(struct trace_iterator *iter);
Steven Rostedtbc0c38d2008-05-12 21:20:42 +0200279 void (*close)(struct trace_iterator *iter);
Steven Rostedtc521efd2009-12-07 09:06:24 -0500280 void (*pipe_close)(struct trace_iterator *iter);
Steven Rostedt107bad82008-05-12 21:21:01 +0200281 ssize_t (*read)(struct trace_iterator *iter,
282 struct file *filp, char __user *ubuf,
283 size_t cnt, loff_t *ppos);
Eduard - Gabriel Munteanu3c568192009-02-09 08:15:56 +0200284 ssize_t (*splice_read)(struct trace_iterator *iter,
285 struct file *filp,
286 loff_t *ppos,
287 struct pipe_inode_info *pipe,
288 size_t len,
289 unsigned int flags);
Steven Rostedt60a11772008-05-12 21:20:44 +0200290#ifdef CONFIG_FTRACE_STARTUP_TEST
291 int (*selftest)(struct tracer *trace,
292 struct trace_array *tr);
293#endif
Markus Metzger8bba1bf2008-11-25 09:12:31 +0100294 void (*print_header)(struct seq_file *m);
Frederic Weisbecker2c4f0352008-09-29 20:18:34 +0200295 enum print_line_t (*print_line)(struct trace_iterator *iter);
Frederic Weisbeckeradf9f192008-11-17 19:23:42 +0100296 /* If you handled the flag setting, return 0 */
297 int (*set_flag)(u32 old_flags, u32 bit, int set);
Steven Rostedtbc0c38d2008-05-12 21:20:42 +0200298 struct tracer *next;
299 int print_max;
Ingo Molnar9de36822009-03-06 17:52:03 +0100300 struct tracer_flags *flags;
Steven Rostedtbc0c38d2008-05-12 21:20:42 +0200301};
302
Steven Rostedtf9520752009-03-02 14:04:40 -0500303
Frederic Weisbeckerb04cc6b2009-02-25 03:22:28 +0100304#define TRACE_PIPE_ALL_CPU -1
305
Arnaldo Carvalho de Melob6f11df2009-02-05 18:02:00 -0200306int tracer_init(struct tracer *t, struct trace_array *tr);
Steven Rostedt90369902008-11-05 16:05:44 -0500307int tracing_is_enabled(void);
Pekka Paalanen45dcd8b2008-09-16 21:56:41 +0300308void trace_wake_up(void);
Steven Rostedt3928a8a2008-09-29 23:02:41 -0400309void tracing_reset(struct trace_array *tr, int cpu);
Pekka J Enberg213cc062008-12-19 12:08:39 +0200310void tracing_reset_online_cpus(struct trace_array *tr);
Steven Rostedt9456f0f2009-05-06 21:54:09 -0400311void tracing_reset_current(int cpu);
312void tracing_reset_current_online_cpus(void);
Steven Rostedtbc0c38d2008-05-12 21:20:42 +0200313int tracing_open_generic(struct inode *inode, struct file *filp);
Frederic Weisbecker5452af62009-03-27 00:25:38 +0100314struct dentry *trace_create_file(const char *name,
315 mode_t mode,
316 struct dentry *parent,
317 void *data,
318 const struct file_operations *fops);
319
Steven Rostedtbc0c38d2008-05-12 21:20:42 +0200320struct dentry *tracing_init_dentry(void);
Ingo Molnard618b3e2008-05-12 21:20:49 +0200321void init_tracer_sysprof_debugfs(struct dentry *d_tracer);
322
Arnaldo Carvalho de Melo51a763d2009-02-05 16:14:13 -0200323struct ring_buffer_event;
324
Steven Rostedte77405a2009-09-02 14:17:06 -0400325struct ring_buffer_event *
326trace_buffer_lock_reserve(struct ring_buffer *buffer,
327 int type,
328 unsigned long len,
329 unsigned long flags,
330 int pc);
331void trace_buffer_unlock_commit(struct ring_buffer *buffer,
Arnaldo Carvalho de Melo51a763d2009-02-05 16:14:13 -0200332 struct ring_buffer_event *event,
333 unsigned long flags, int pc);
334
Pekka Paalanen45dcd8b2008-09-16 21:56:41 +0300335struct trace_entry *tracing_get_trace_entry(struct trace_array *tr,
336 struct trace_array_cpu *data);
Frederic Weisbeckerc4a8e8b2009-02-02 20:29:21 -0200337
338struct trace_entry *trace_find_next_entry(struct trace_iterator *iter,
339 int *ent_cpu, u64 *ent_ts);
340
Frederic Weisbecker6eaaa5d2009-02-11 02:25:00 +0100341void default_wait_pipe(struct trace_iterator *iter);
342void poll_wait_pipe(struct trace_iterator *iter);
343
Steven Rostedtbc0c38d2008-05-12 21:20:42 +0200344void ftrace(struct trace_array *tr,
345 struct trace_array_cpu *data,
346 unsigned long ip,
347 unsigned long parent_ip,
Steven Rostedt38697052008-10-01 13:14:09 -0400348 unsigned long flags, int pc);
Steven Rostedtbc0c38d2008-05-12 21:20:42 +0200349void tracing_sched_switch_trace(struct trace_array *tr,
Steven Rostedtbc0c38d2008-05-12 21:20:42 +0200350 struct task_struct *prev,
351 struct task_struct *next,
Steven Rostedt38697052008-10-01 13:14:09 -0400352 unsigned long flags, int pc);
Ingo Molnar57422792008-05-12 21:20:51 +0200353
354void tracing_sched_wakeup_trace(struct trace_array *tr,
Ingo Molnar57422792008-05-12 21:20:51 +0200355 struct task_struct *wakee,
356 struct task_struct *cur,
Steven Rostedt38697052008-10-01 13:14:09 -0400357 unsigned long flags, int pc);
Ingo Molnarf0a920d2008-05-12 21:20:47 +0200358void trace_special(struct trace_array *tr,
359 struct trace_array_cpu *data,
360 unsigned long arg1,
361 unsigned long arg2,
Steven Rostedt38697052008-10-01 13:14:09 -0400362 unsigned long arg3, int pc);
Steven Rostedt6fb44b72008-05-12 21:20:49 +0200363void trace_function(struct trace_array *tr,
Steven Rostedt6fb44b72008-05-12 21:20:49 +0200364 unsigned long ip,
365 unsigned long parent_ip,
Steven Rostedt38697052008-10-01 13:14:09 -0400366 unsigned long flags, int pc);
Jiri Olsa62b915f2010-04-02 19:01:22 +0200367void trace_default_header(struct seq_file *m);
368void print_trace_header(struct seq_file *m, struct trace_iterator *iter);
369int trace_empty(struct trace_iterator *iter);
Steven Rostedtbc0c38d2008-05-12 21:20:42 +0200370
Frederic Weisbecker287b6e62008-11-26 00:57:25 +0100371void trace_graph_return(struct ftrace_graph_ret *trace);
Steven Rostedte49dc192008-12-02 23:50:05 -0500372int trace_graph_entry(struct ftrace_graph_ent *trace);
Frederic Weisbecker1a0799a2009-07-29 18:59:58 +0200373void set_graph_array(struct trace_array *tr);
Markus Metzger1e9b51c2008-11-25 09:24:15 +0100374
Steven Rostedt41bc8142008-05-22 11:49:22 -0400375void tracing_start_cmdline_record(void);
376void tracing_stop_cmdline_record(void);
Steven Rostedte168e052008-11-07 22:36:02 -0500377void tracing_sched_switch_assign_trace(struct trace_array *tr);
378void tracing_stop_sched_switch_record(void);
379void tracing_start_sched_switch_record(void);
Steven Rostedtbc0c38d2008-05-12 21:20:42 +0200380int register_tracer(struct tracer *type);
381void unregister_tracer(struct tracer *type);
Carsten Emdeb5130b12009-09-13 01:43:07 +0200382int is_tracing_stopped(void);
Steven Rostedtbc0c38d2008-05-12 21:20:42 +0200383
Frederic Weisbecker0f8f86c2009-10-18 01:09:09 +0200384extern int process_new_ksym_entry(char *ksymname, int op, unsigned long addr);
Steven Rostedtbc0c38d2008-05-12 21:20:42 +0200385
386extern unsigned long nsecs_to_usecs(unsigned long nsecs);
387
Tim Bird0e950172010-02-25 15:36:43 -0800388extern unsigned long tracing_thresh;
389
Steven Rostedt5d4a9db2009-08-27 16:52:21 -0400390#ifdef CONFIG_TRACER_MAX_TRACE
Steven Rostedtbc0c38d2008-05-12 21:20:42 +0200391extern unsigned long tracing_max_latency;
Steven Rostedtbc0c38d2008-05-12 21:20:42 +0200392
393void update_max_tr(struct trace_array *tr, struct task_struct *tsk, int cpu);
394void update_max_tr_single(struct trace_array *tr,
395 struct task_struct *tsk, int cpu);
Steven Rostedt5d4a9db2009-08-27 16:52:21 -0400396#endif /* CONFIG_TRACER_MAX_TRACE */
Steven Rostedtbc0c38d2008-05-12 21:20:42 +0200397
Frederic Weisbeckerc0a0d0d2009-07-29 17:51:13 +0200398#ifdef CONFIG_STACKTRACE
Steven Rostedte77405a2009-09-02 14:17:06 -0400399void ftrace_trace_stack(struct ring_buffer *buffer, unsigned long flags,
Frederic Weisbeckerc0a0d0d2009-07-29 17:51:13 +0200400 int skip, int pc);
401
Steven Rostedte77405a2009-09-02 14:17:06 -0400402void ftrace_trace_userstack(struct ring_buffer *buffer, unsigned long flags,
Frederic Weisbeckerc0a0d0d2009-07-29 17:51:13 +0200403 int pc);
404
405void __trace_stack(struct trace_array *tr, unsigned long flags, int skip,
406 int pc);
407#else
408static inline void ftrace_trace_stack(struct trace_array *tr,
409 unsigned long flags, int skip, int pc)
410{
411}
412
413static inline void ftrace_trace_userstack(struct trace_array *tr,
414 unsigned long flags, int pc)
415{
416}
417
418static inline void __trace_stack(struct trace_array *tr, unsigned long flags,
419 int skip, int pc)
420{
421}
422#endif /* CONFIG_STACKTRACE */
Steven Rostedt53614992009-01-15 19:12:40 -0500423
Ingo Molnare309b412008-05-12 21:20:51 +0200424extern cycle_t ftrace_now(int cpu);
Steven Rostedtbc0c38d2008-05-12 21:20:42 +0200425
Steven Rostedt4ca530852009-03-16 19:20:15 -0400426extern void trace_find_cmdline(int pid, char comm[]);
Ingo Molnarf7d48cb2008-12-29 13:02:17 +0100427
Steven Rostedtbc0c38d2008-05-12 21:20:42 +0200428#ifdef CONFIG_DYNAMIC_FTRACE
429extern unsigned long ftrace_update_tot_cnt;
Steven Rostedtd05cdb22008-05-12 21:20:54 +0200430#define DYN_FTRACE_TEST_NAME trace_selftest_dynamic_test_func
431extern int DYN_FTRACE_TEST_NAME(void);
Steven Rostedtbc0c38d2008-05-12 21:20:42 +0200432#endif
433
Li Zefan020e5f82009-07-01 10:47:05 +0800434extern int ring_buffer_expanded;
435extern bool tracing_selftest_disabled;
Christoph Lameter9288f992009-10-07 19:17:45 -0400436DECLARE_PER_CPU(int, ftrace_cpu_disabled);
Li Zefan020e5f82009-07-01 10:47:05 +0800437
Steven Rostedt60a11772008-05-12 21:20:44 +0200438#ifdef CONFIG_FTRACE_STARTUP_TEST
Steven Rostedt60a11772008-05-12 21:20:44 +0200439extern int trace_selftest_startup_function(struct tracer *trace,
440 struct trace_array *tr);
Frederic Weisbecker7447dce2009-02-07 21:33:57 +0100441extern int trace_selftest_startup_function_graph(struct tracer *trace,
442 struct trace_array *tr);
Steven Rostedt60a11772008-05-12 21:20:44 +0200443extern int trace_selftest_startup_irqsoff(struct tracer *trace,
444 struct trace_array *tr);
Steven Rostedt60a11772008-05-12 21:20:44 +0200445extern int trace_selftest_startup_preemptoff(struct tracer *trace,
446 struct trace_array *tr);
Steven Rostedt60a11772008-05-12 21:20:44 +0200447extern int trace_selftest_startup_preemptirqsoff(struct tracer *trace,
448 struct trace_array *tr);
Steven Rostedt60a11772008-05-12 21:20:44 +0200449extern int trace_selftest_startup_wakeup(struct tracer *trace,
450 struct trace_array *tr);
Steven Noonanfb1b6d82008-09-19 03:06:43 -0700451extern int trace_selftest_startup_nop(struct tracer *trace,
452 struct trace_array *tr);
Steven Rostedt60a11772008-05-12 21:20:44 +0200453extern int trace_selftest_startup_sched_switch(struct tracer *trace,
454 struct trace_array *tr);
Ingo Molnara6dd24f2008-05-12 21:20:47 +0200455extern int trace_selftest_startup_sysprof(struct tracer *trace,
456 struct trace_array *tr);
Steven Rostedt80e5ea42008-11-12 15:24:24 -0500457extern int trace_selftest_startup_branch(struct tracer *trace,
458 struct trace_array *tr);
K.Prasad0722db02009-06-01 23:46:40 +0530459extern int trace_selftest_startup_ksym(struct tracer *trace,
460 struct trace_array *tr);
Steven Rostedt60a11772008-05-12 21:20:44 +0200461#endif /* CONFIG_FTRACE_STARTUP_TEST */
462
Ingo Molnarc7aafc52008-05-12 21:20:45 +0200463extern void *head_page(struct trace_array_cpu *data);
Lai Jiangshancf8e3472009-03-30 13:48:00 +0800464extern unsigned long long ns2usecs(cycle_t nsec);
Frederic Weisbecker1fd8f2a2008-12-03 23:45:11 +0100465extern int
Steven Rostedt40ce74f2009-03-19 14:03:53 -0400466trace_vbprintk(unsigned long ip, const char *fmt, va_list args);
Frederic Weisbecker48ead022009-03-12 18:24:49 +0100467extern int
Steven Rostedt40ce74f2009-03-19 14:03:53 -0400468trace_vprintk(unsigned long ip, const char *fmt, va_list args);
Steven Rostedt659372d2009-09-03 19:11:07 -0400469extern int
470trace_array_vprintk(struct trace_array *tr,
471 unsigned long ip, const char *fmt, va_list args);
472int trace_array_printk(struct trace_array *tr,
473 unsigned long ip, const char *fmt, ...);
Ingo Molnarc7aafc52008-05-12 21:20:45 +0200474
Ingo Molnar4e655512008-05-12 21:20:52 +0200475extern unsigned long trace_flags;
476
Zhaolei5079f322009-08-25 16:12:56 +0800477extern int trace_clock_id;
478
Frederic Weisbecker15e6cb32008-11-11 07:14:25 +0100479/* Standard output formatting function used for function return traces */
Frederic Weisbeckerfb526072008-11-25 21:07:04 +0100480#ifdef CONFIG_FUNCTION_GRAPH_TRACER
Jiri Olsa62b915f2010-04-02 19:01:22 +0200481
482/* Flag options */
483#define TRACE_GRAPH_PRINT_OVERRUN 0x1
484#define TRACE_GRAPH_PRINT_CPU 0x2
485#define TRACE_GRAPH_PRINT_OVERHEAD 0x4
486#define TRACE_GRAPH_PRINT_PROC 0x8
487#define TRACE_GRAPH_PRINT_DURATION 0x10
488#define TRACE_GRAPH_PRINT_ABS_TIME 0x20
489
Jiri Olsad7a8d9e2010-04-02 19:01:21 +0200490extern enum print_line_t
491print_graph_function_flags(struct trace_iterator *iter, u32 flags);
492extern void print_graph_headers_flags(struct seq_file *s, u32 flags);
Steven Rostedt0706f1c2009-03-23 23:12:58 -0400493extern enum print_line_t
494trace_print_graph_duration(unsigned long long duration, struct trace_seq *s);
Jiri Olsa62b915f2010-04-02 19:01:22 +0200495extern void graph_trace_open(struct trace_iterator *iter);
496extern void graph_trace_close(struct trace_iterator *iter);
497extern int __trace_graph_entry(struct trace_array *tr,
498 struct ftrace_graph_ent *trace,
499 unsigned long flags, int pc);
500extern void __trace_graph_return(struct trace_array *tr,
501 struct ftrace_graph_ret *trace,
502 unsigned long flags, int pc);
503
Steven Rostedtea4e2bc2008-12-03 15:36:57 -0500504
505#ifdef CONFIG_DYNAMIC_FTRACE
506/* TODO: make this variable */
507#define FTRACE_GRAPH_MAX_FUNCS 32
Li Zefanc7c6b1f2010-02-10 15:43:04 +0800508extern int ftrace_graph_filter_enabled;
Steven Rostedtea4e2bc2008-12-03 15:36:57 -0500509extern int ftrace_graph_count;
510extern unsigned long ftrace_graph_funcs[FTRACE_GRAPH_MAX_FUNCS];
511
512static inline int ftrace_graph_addr(unsigned long addr)
513{
514 int i;
515
Li Zefanc7c6b1f2010-02-10 15:43:04 +0800516 if (!ftrace_graph_filter_enabled)
Steven Rostedtea4e2bc2008-12-03 15:36:57 -0500517 return 1;
518
519 for (i = 0; i < ftrace_graph_count; i++) {
520 if (addr == ftrace_graph_funcs[i])
521 return 1;
522 }
523
524 return 0;
525}
Frederic Weisbecker15e6cb32008-11-11 07:14:25 +0100526#else
Ingo Molnar6b253932008-12-04 09:18:28 +0100527static inline int ftrace_graph_addr(unsigned long addr)
528{
529 return 1;
Steven Rostedtea4e2bc2008-12-03 15:36:57 -0500530}
531#endif /* CONFIG_DYNAMIC_FTRACE */
Steven Rostedtea4e2bc2008-12-03 15:36:57 -0500532#else /* CONFIG_FUNCTION_GRAPH_TRACER */
Frederic Weisbecker15e6cb32008-11-11 07:14:25 +0100533static inline enum print_line_t
Jiri Olsad7a8d9e2010-04-02 19:01:21 +0200534print_graph_function_flags(struct trace_iterator *iter, u32 flags)
Frederic Weisbecker15e6cb32008-11-11 07:14:25 +0100535{
536 return TRACE_TYPE_UNHANDLED;
537}
Steven Rostedtea4e2bc2008-12-03 15:36:57 -0500538#endif /* CONFIG_FUNCTION_GRAPH_TRACER */
Frederic Weisbecker15e6cb32008-11-11 07:14:25 +0100539
jolsa@redhat.com756d17e2009-10-13 16:33:52 -0400540extern struct list_head ftrace_pids;
Steven Rostedt804a6852008-12-03 15:36:59 -0500541
Paul Mundt1155de42009-06-25 14:30:12 +0900542#ifdef CONFIG_FUNCTION_TRACER
Steven Rostedt804a6852008-12-03 15:36:59 -0500543static inline int ftrace_trace_task(struct task_struct *task)
544{
jolsa@redhat.com756d17e2009-10-13 16:33:52 -0400545 if (list_empty(&ftrace_pids))
Steven Rostedt804a6852008-12-03 15:36:59 -0500546 return 1;
547
548 return test_tsk_trace_trace(task);
549}
Paul Mundt1155de42009-06-25 14:30:12 +0900550#else
551static inline int ftrace_trace_task(struct task_struct *task)
552{
553 return 1;
554}
555#endif
Steven Rostedt804a6852008-12-03 15:36:59 -0500556
Steven Rostedt4fcdae82008-05-12 21:21:00 +0200557/*
jolsa@redhat.comb63f39e2009-09-11 17:29:27 +0200558 * struct trace_parser - servers for reading the user input separated by spaces
559 * @cont: set if the input is not complete - no final space char was found
560 * @buffer: holds the parsed user input
Daniel Mack1537a362010-01-29 15:57:49 +0800561 * @idx: user input length
jolsa@redhat.comb63f39e2009-09-11 17:29:27 +0200562 * @size: buffer size
563 */
564struct trace_parser {
565 bool cont;
566 char *buffer;
567 unsigned idx;
568 unsigned size;
569};
570
571static inline bool trace_parser_loaded(struct trace_parser *parser)
572{
573 return (parser->idx != 0);
574}
575
576static inline bool trace_parser_cont(struct trace_parser *parser)
577{
578 return parser->cont;
579}
580
581static inline void trace_parser_clear(struct trace_parser *parser)
582{
583 parser->cont = false;
584 parser->idx = 0;
585}
586
587extern int trace_parser_get_init(struct trace_parser *parser, int size);
588extern void trace_parser_put(struct trace_parser *parser);
589extern int trace_get_user(struct trace_parser *parser, const char __user *ubuf,
590 size_t cnt, loff_t *ppos);
591
592/*
Steven Rostedt4fcdae82008-05-12 21:21:00 +0200593 * trace_iterator_flags is an enumeration that defines bit
594 * positions into trace_flags that controls the output.
595 *
596 * NOTE: These bits must match the trace_options array in
597 * trace.c.
598 */
Ingo Molnar4e655512008-05-12 21:20:52 +0200599enum trace_iterator_flags {
600 TRACE_ITER_PRINT_PARENT = 0x01,
601 TRACE_ITER_SYM_OFFSET = 0x02,
602 TRACE_ITER_SYM_ADDR = 0x04,
603 TRACE_ITER_VERBOSE = 0x08,
604 TRACE_ITER_RAW = 0x10,
605 TRACE_ITER_HEX = 0x20,
606 TRACE_ITER_BIN = 0x40,
607 TRACE_ITER_BLOCK = 0x80,
608 TRACE_ITER_STACKTRACE = 0x100,
Li Zefan2cbafd62009-12-08 11:16:26 +0800609 TRACE_ITER_PRINTK = 0x200,
610 TRACE_ITER_PREEMPTONLY = 0x400,
611 TRACE_ITER_BRANCH = 0x800,
612 TRACE_ITER_ANNOTATE = 0x1000,
613 TRACE_ITER_USERSTACKTRACE = 0x2000,
614 TRACE_ITER_SYM_USEROBJ = 0x4000,
615 TRACE_ITER_PRINTK_MSGONLY = 0x8000,
616 TRACE_ITER_CONTEXT_INFO = 0x10000, /* Print pid/cpu/time */
617 TRACE_ITER_LATENCY_FMT = 0x20000,
618 TRACE_ITER_SLEEP_TIME = 0x40000,
619 TRACE_ITER_GRAPH_TIME = 0x80000,
Ingo Molnar4e655512008-05-12 21:20:52 +0200620};
621
Frederic Weisbecker15e6cb32008-11-11 07:14:25 +0100622/*
623 * TRACE_ITER_SYM_MASK masks the options in trace_flags that
624 * control the output of kernel symbols.
625 */
626#define TRACE_ITER_SYM_MASK \
627 (TRACE_ITER_PRINT_PARENT|TRACE_ITER_SYM_OFFSET|TRACE_ITER_SYM_ADDR)
628
Frédéric Weisbecker43a15382008-09-21 20:16:30 +0200629extern struct tracer nop_trace;
630
Steven Rostedt8f0a0562008-11-03 23:15:55 -0500631/**
632 * ftrace_preempt_disable - disable preemption scheduler safe
633 *
634 * When tracing can happen inside the scheduler, there exists
635 * cases that the tracing might happen before the need_resched
636 * flag is checked. If this happens and the tracer calls
637 * preempt_enable (after a disable), a schedule might take place
638 * causing an infinite recursion.
639 *
Wenji Huang57794a92009-02-06 17:33:27 +0800640 * To prevent this, we read the need_resched flag before
Steven Rostedt8f0a0562008-11-03 23:15:55 -0500641 * disabling preemption. When we want to enable preemption we
642 * check the flag, if it is set, then we call preempt_enable_no_resched.
643 * Otherwise, we call preempt_enable.
644 *
Wenji Huang57794a92009-02-06 17:33:27 +0800645 * The rational for doing the above is that if need_resched is set
Steven Rostedt8f0a0562008-11-03 23:15:55 -0500646 * and we have yet to reschedule, we are either in an atomic location
647 * (where we do not need to check for scheduling) or we are inside
648 * the scheduler and do not want to resched.
649 */
650static inline int ftrace_preempt_disable(void)
651{
652 int resched;
653
654 resched = need_resched();
655 preempt_disable_notrace();
656
657 return resched;
658}
659
660/**
661 * ftrace_preempt_enable - enable preemption scheduler safe
662 * @resched: the return value from ftrace_preempt_disable
663 *
664 * This is a scheduler safe way to enable preemption and not miss
665 * any preemption checks. The disabled saved the state of preemption.
Wenji Huang57794a92009-02-06 17:33:27 +0800666 * If resched is set, then we are either inside an atomic or
Steven Rostedt8f0a0562008-11-03 23:15:55 -0500667 * are inside the scheduler (we would have already scheduled
668 * otherwise). In this case, we do not want to call normal
669 * preempt_enable, but preempt_enable_no_resched instead.
670 */
671static inline void ftrace_preempt_enable(int resched)
672{
673 if (resched)
674 preempt_enable_no_resched_notrace();
675 else
676 preempt_enable_notrace();
677}
678
Steven Rostedt2ed84ee2008-11-12 15:24:24 -0500679#ifdef CONFIG_BRANCH_TRACER
Steven Rostedt9f029e82008-11-12 15:24:24 -0500680extern int enable_branch_tracing(struct trace_array *tr);
681extern void disable_branch_tracing(void);
682static inline int trace_branch_enable(struct trace_array *tr)
Steven Rostedt52f232c2008-11-12 00:14:40 -0500683{
Steven Rostedt9f029e82008-11-12 15:24:24 -0500684 if (trace_flags & TRACE_ITER_BRANCH)
685 return enable_branch_tracing(tr);
Steven Rostedt52f232c2008-11-12 00:14:40 -0500686 return 0;
687}
Steven Rostedt9f029e82008-11-12 15:24:24 -0500688static inline void trace_branch_disable(void)
Steven Rostedt52f232c2008-11-12 00:14:40 -0500689{
690 /* due to races, always disable */
Steven Rostedt9f029e82008-11-12 15:24:24 -0500691 disable_branch_tracing();
Steven Rostedt52f232c2008-11-12 00:14:40 -0500692}
693#else
Steven Rostedt9f029e82008-11-12 15:24:24 -0500694static inline int trace_branch_enable(struct trace_array *tr)
Steven Rostedt52f232c2008-11-12 00:14:40 -0500695{
696 return 0;
697}
Steven Rostedt9f029e82008-11-12 15:24:24 -0500698static inline void trace_branch_disable(void)
Steven Rostedt52f232c2008-11-12 00:14:40 -0500699{
700}
Steven Rostedt2ed84ee2008-11-12 15:24:24 -0500701#endif /* CONFIG_BRANCH_TRACER */
Steven Rostedt52f232c2008-11-12 00:14:40 -0500702
Steven Rostedt1852fcc2009-03-11 14:33:00 -0400703/* set ring buffers to default size if not already done so */
704int tracing_update_buffers(void);
705
Steven Rostedtfd994982009-02-28 02:41:25 -0500706/* trace event type bit fields, not numeric */
707enum {
708 TRACE_EVENT_TYPE_PRINTF = 1,
709 TRACE_EVENT_TYPE_RAW = 2,
710};
711
Tom Zanussicf027f62009-03-22 03:30:39 -0500712struct ftrace_event_field {
713 struct list_head link;
714 char *name;
715 char *type;
Li Zefanaa38e9f2009-08-07 10:33:02 +0800716 int filter_type;
Tom Zanussicf027f62009-03-22 03:30:39 -0500717 int offset;
718 int size;
Tom Zanussia118e4d2009-04-28 03:04:53 -0500719 int is_signed;
Tom Zanussicf027f62009-03-22 03:30:39 -0500720};
721
Tom Zanussi30e673b2009-04-28 03:04:47 -0500722struct event_filter {
723 int n_preds;
724 struct filter_pred **preds;
Tom Zanussi8b372562009-04-28 03:04:59 -0500725 char *filter_string;
Tom Zanussi30e673b2009-04-28 03:04:47 -0500726};
727
Tom Zanussicfb180f2009-03-22 03:31:17 -0500728struct event_subsystem {
729 struct list_head list;
730 const char *name;
731 struct dentry *entry;
Li Zefan1f9963c2009-07-20 10:20:53 +0800732 struct event_filter *filter;
Xiao Guangrongdc82ec98a2009-07-09 16:22:22 +0800733 int nr_events;
Tom Zanussicfb180f2009-03-22 03:31:17 -0500734};
735
Tom Zanussi7ce7e422009-03-22 03:31:04 -0500736struct filter_pred;
Frederic Weisbecker1889d202009-09-24 21:10:44 +0200737struct regex;
Tom Zanussi7ce7e422009-03-22 03:31:04 -0500738
Tom Zanussi8b372562009-04-28 03:04:59 -0500739typedef int (*filter_pred_fn_t) (struct filter_pred *pred, void *event,
740 int val1, int val2);
Tom Zanussi7ce7e422009-03-22 03:31:04 -0500741
Frederic Weisbecker1889d202009-09-24 21:10:44 +0200742typedef int (*regex_match_func)(char *str, struct regex *r, int len);
743
Frederic Weisbecker3f6fe062009-09-24 21:31:51 +0200744enum regex_type {
Li Zefanb0f1a592009-10-15 11:21:12 +0800745 MATCH_FULL = 0,
Frederic Weisbecker3f6fe062009-09-24 21:31:51 +0200746 MATCH_FRONT_ONLY,
747 MATCH_MIDDLE_ONLY,
748 MATCH_END_ONLY,
Tom Zanussi7ce7e422009-03-22 03:31:04 -0500749};
750
Frederic Weisbecker1889d202009-09-24 21:10:44 +0200751struct regex {
752 char pattern[MAX_FILTER_STR_VAL];
753 int len;
754 int field_len;
755 regex_match_func match;
756};
757
Tom Zanussicf027f62009-03-22 03:30:39 -0500758struct filter_pred {
Frederic Weisbecker1889d202009-09-24 21:10:44 +0200759 filter_pred_fn_t fn;
760 u64 val;
761 struct regex regex;
762 char *field_name;
763 int offset;
764 int not;
765 int op;
766 int pop_n;
Steven Rostedtc32e8272009-02-27 19:12:30 -0500767};
768
Frederic Weisbecker3f6fe062009-09-24 21:31:51 +0200769extern enum regex_type
770filter_parse_regex(char *buff, int len, char **search, int *not);
Tom Zanussi8b372562009-04-28 03:04:59 -0500771extern void print_event_filter(struct ftrace_event_call *call,
Tom Zanussi4bda2d52009-03-24 02:14:31 -0500772 struct trace_seq *s);
Tom Zanussi8b372562009-04-28 03:04:59 -0500773extern int apply_event_filter(struct ftrace_event_call *call,
774 char *filter_string);
775extern int apply_subsystem_event_filter(struct event_subsystem *system,
776 char *filter_string);
777extern void print_subsystem_event_filter(struct event_subsystem *system,
Tom Zanussiac1adc52009-04-17 00:27:08 -0500778 struct trace_seq *s);
Li Zefanaa38e9f2009-08-07 10:33:02 +0800779extern int filter_assign_type(const char *type);
Tom Zanussi7ce7e422009-03-22 03:31:04 -0500780
Tom Zanussieb02ce02009-04-08 03:15:54 -0500781static inline int
Tom Zanussie1112b42009-03-31 00:48:49 -0500782filter_check_discard(struct ftrace_event_call *call, void *rec,
Tom Zanussieb02ce02009-04-08 03:15:54 -0500783 struct ring_buffer *buffer,
Tom Zanussie1112b42009-03-31 00:48:49 -0500784 struct ring_buffer_event *event)
785{
Li Zefan6fb29152009-10-15 11:21:42 +0800786 if (unlikely(call->filter_active) &&
787 !filter_match_preds(call->filter, rec)) {
Tom Zanussieb02ce02009-04-08 03:15:54 -0500788 ring_buffer_discard_commit(buffer, event);
789 return 1;
790 }
791
792 return 0;
Tom Zanussie1112b42009-03-31 00:48:49 -0500793}
794
Li Zefan20c89282009-05-06 10:33:45 +0800795extern struct mutex event_mutex;
Steven Rostedta59fd602009-04-10 13:52:20 -0400796extern struct list_head ftrace_events;
Peter Zijlstraac199db2009-03-19 20:26:15 +0100797
Steven Rostedte9fb2b62009-03-12 14:19:25 -0400798extern const char *__start___trace_bprintk_fmt[];
799extern const char *__stop___trace_bprintk_fmt[];
800
Steven Rostedt4e5292e2009-09-12 19:26:21 -0400801#undef FTRACE_ENTRY
802#define FTRACE_ENTRY(call, struct_name, id, tstruct, print) \
Jeff Mahoney86c38a32010-02-24 13:59:23 -0500803 extern struct ftrace_event_call \
804 __attribute__((__aligned__(4))) event_##call;
Steven Rostedt4e5292e2009-09-12 19:26:21 -0400805#undef FTRACE_ENTRY_DUP
806#define FTRACE_ENTRY_DUP(call, struct_name, id, tstruct, print) \
807 FTRACE_ENTRY(call, struct_name, id, PARAMS(tstruct), PARAMS(print))
808#include "trace_entries.h"
Tom Zanussie1112b42009-03-31 00:48:49 -0500809
Steven Rostedtbc0c38d2008-05-12 21:20:42 +0200810#endif /* _LINUX_KERNEL_TRACE_H */