Arnaldo Carvalho de Melo | 16444a8 | 2008-05-12 21:20:42 +0200 | [diff] [blame] | 1 | #ifndef _LINUX_FTRACE_H |
| 2 | #define _LINUX_FTRACE_H |
| 3 | |
Arnaldo Carvalho de Melo | 16444a8 | 2008-05-12 21:20:42 +0200 | [diff] [blame] | 4 | #include <linux/linkage.h> |
Ingo Molnar | d49dbf3 | 2008-05-16 10:41:53 +0200 | [diff] [blame] | 5 | #include <linux/fs.h> |
Steven Noonan | eb7fa93 | 2008-10-02 12:00:07 -0700 | [diff] [blame] | 6 | #include <linux/ktime.h> |
Frédéric Weisbecker | d13744c | 2008-09-23 11:32:08 +0100 | [diff] [blame] | 7 | #include <linux/init.h> |
| 8 | #include <linux/types.h> |
Frederic Weisbecker | 5601020 | 2008-10-02 13:26:05 +0200 | [diff] [blame] | 9 | #include <linux/kallsyms.h> |
Arnaldo Carvalho de Melo | 16444a8 | 2008-05-12 21:20:42 +0200 | [diff] [blame] | 10 | |
Steven Rostedt | 606576c | 2008-10-06 19:06:12 -0400 | [diff] [blame] | 11 | #ifdef CONFIG_FUNCTION_TRACER |
Ingo Molnar | 3e1932a | 2008-10-02 17:45:47 +0200 | [diff] [blame] | 12 | |
Steven Rostedt | b0fc494 | 2008-05-12 21:20:43 +0200 | [diff] [blame] | 13 | extern int ftrace_enabled; |
| 14 | extern int |
| 15 | ftrace_enable_sysctl(struct ctl_table *table, int write, |
| 16 | struct file *filp, void __user *buffer, size_t *lenp, |
| 17 | loff_t *ppos); |
| 18 | |
Arnaldo Carvalho de Melo | 16444a8 | 2008-05-12 21:20:42 +0200 | [diff] [blame] | 19 | typedef void (*ftrace_func_t)(unsigned long ip, unsigned long parent_ip); |
| 20 | |
| 21 | struct ftrace_ops { |
| 22 | ftrace_func_t func; |
| 23 | struct ftrace_ops *next; |
| 24 | }; |
| 25 | |
Steven Rostedt | 60a7ecf | 2008-11-05 16:05:44 -0500 | [diff] [blame] | 26 | extern int function_trace_stop; |
| 27 | |
Frederic Weisbecker | e7d3737 | 2008-11-16 06:02:06 +0100 | [diff] [blame] | 28 | /* |
| 29 | * Type of the current tracing. |
| 30 | */ |
| 31 | enum ftrace_tracing_type_t { |
| 32 | FTRACE_TYPE_ENTER = 0, /* Hook the call of the function */ |
| 33 | FTRACE_TYPE_RETURN, /* Hook the return of the function */ |
| 34 | }; |
| 35 | |
| 36 | /* Current tracing type, default is FTRACE_TYPE_ENTER */ |
| 37 | extern enum ftrace_tracing_type_t ftrace_tracing_type; |
| 38 | |
Steven Rostedt | 60a7ecf | 2008-11-05 16:05:44 -0500 | [diff] [blame] | 39 | /** |
| 40 | * ftrace_stop - stop function tracer. |
| 41 | * |
| 42 | * A quick way to stop the function tracer. Note this an on off switch, |
| 43 | * it is not something that is recursive like preempt_disable. |
| 44 | * This does not disable the calling of mcount, it only stops the |
| 45 | * calling of functions from mcount. |
| 46 | */ |
| 47 | static inline void ftrace_stop(void) |
| 48 | { |
| 49 | function_trace_stop = 1; |
| 50 | } |
| 51 | |
| 52 | /** |
| 53 | * ftrace_start - start the function tracer. |
| 54 | * |
| 55 | * This function is the inverse of ftrace_stop. This does not enable |
| 56 | * the function tracing if the function tracer is disabled. This only |
| 57 | * sets the function tracer flag to continue calling the functions |
| 58 | * from mcount. |
| 59 | */ |
| 60 | static inline void ftrace_start(void) |
| 61 | { |
| 62 | function_trace_stop = 0; |
| 63 | } |
| 64 | |
Arnaldo Carvalho de Melo | 16444a8 | 2008-05-12 21:20:42 +0200 | [diff] [blame] | 65 | /* |
| 66 | * The ftrace_ops must be a static and should also |
| 67 | * be read_mostly. These functions do modify read_mostly variables |
| 68 | * so use them sparely. Never free an ftrace_op or modify the |
| 69 | * next pointer after it has been registered. Even after unregistering |
| 70 | * it, the next pointer may still be used internally. |
| 71 | */ |
| 72 | int register_ftrace_function(struct ftrace_ops *ops); |
| 73 | int unregister_ftrace_function(struct ftrace_ops *ops); |
| 74 | void clear_ftrace_function(void); |
| 75 | |
| 76 | extern void ftrace_stub(unsigned long a0, unsigned long a1); |
Arnaldo Carvalho de Melo | 16444a8 | 2008-05-12 21:20:42 +0200 | [diff] [blame] | 77 | |
Steven Rostedt | 606576c | 2008-10-06 19:06:12 -0400 | [diff] [blame] | 78 | #else /* !CONFIG_FUNCTION_TRACER */ |
Arnaldo Carvalho de Melo | 16444a8 | 2008-05-12 21:20:42 +0200 | [diff] [blame] | 79 | # define register_ftrace_function(ops) do { } while (0) |
| 80 | # define unregister_ftrace_function(ops) do { } while (0) |
| 81 | # define clear_ftrace_function(ops) do { } while (0) |
Steven Rostedt | 81adbdc | 2008-10-23 09:33:02 -0400 | [diff] [blame] | 82 | static inline void ftrace_kill(void) { } |
Steven Rostedt | 60a7ecf | 2008-11-05 16:05:44 -0500 | [diff] [blame] | 83 | static inline void ftrace_stop(void) { } |
| 84 | static inline void ftrace_start(void) { } |
Steven Rostedt | 606576c | 2008-10-06 19:06:12 -0400 | [diff] [blame] | 85 | #endif /* CONFIG_FUNCTION_TRACER */ |
Steven Rostedt | 352ad25 | 2008-05-12 21:20:42 +0200 | [diff] [blame] | 86 | |
Steven Rostedt | 3d08339 | 2008-05-12 21:20:42 +0200 | [diff] [blame] | 87 | #ifdef CONFIG_DYNAMIC_FTRACE |
Steven Rostedt | 31e8890 | 2008-11-14 16:21:19 -0800 | [diff] [blame] | 88 | /* asm/ftrace.h must be defined for archs supporting dynamic ftrace */ |
| 89 | #include <asm/ftrace.h> |
| 90 | |
Steven Rostedt | 3c1720f | 2008-05-12 21:20:43 +0200 | [diff] [blame] | 91 | enum { |
Steven Rostedt | 37ad508 | 2008-05-12 21:20:48 +0200 | [diff] [blame] | 92 | FTRACE_FL_FREE = (1 << 0), |
| 93 | FTRACE_FL_FAILED = (1 << 1), |
| 94 | FTRACE_FL_FILTER = (1 << 2), |
| 95 | FTRACE_FL_ENABLED = (1 << 3), |
Steven Rostedt | 41c52c0 | 2008-05-22 11:46:33 -0400 | [diff] [blame] | 96 | FTRACE_FL_NOTRACE = (1 << 4), |
Abhishek Sagar | 0eb9670 | 2008-06-01 21:47:30 +0530 | [diff] [blame] | 97 | FTRACE_FL_CONVERTED = (1 << 5), |
Abhishek Sagar | ecea656 | 2008-06-21 23:47:53 +0530 | [diff] [blame] | 98 | FTRACE_FL_FROZEN = (1 << 6), |
Steven Rostedt | 3c1720f | 2008-05-12 21:20:43 +0200 | [diff] [blame] | 99 | }; |
| 100 | |
Steven Rostedt | 3d08339 | 2008-05-12 21:20:42 +0200 | [diff] [blame] | 101 | struct dyn_ftrace { |
Steven Rostedt | 08f5ac90 | 2008-10-23 09:33:07 -0400 | [diff] [blame] | 102 | struct list_head list; |
| 103 | unsigned long ip; /* address of mcount call-site */ |
| 104 | unsigned long flags; |
Steven Rostedt | 31e8890 | 2008-11-14 16:21:19 -0800 | [diff] [blame] | 105 | struct dyn_arch_ftrace arch; |
Steven Rostedt | 3d08339 | 2008-05-12 21:20:42 +0200 | [diff] [blame] | 106 | }; |
| 107 | |
Steven Rostedt | e1c08bd | 2008-05-12 21:20:44 +0200 | [diff] [blame] | 108 | int ftrace_force_update(void); |
Steven Rostedt | 77a2b37 | 2008-05-12 21:20:45 +0200 | [diff] [blame] | 109 | void ftrace_set_filter(unsigned char *buf, int len, int reset); |
Steven Rostedt | e1c08bd | 2008-05-12 21:20:44 +0200 | [diff] [blame] | 110 | |
Steven Rostedt | 3d08339 | 2008-05-12 21:20:42 +0200 | [diff] [blame] | 111 | /* defined in arch */ |
Steven Rostedt | 3c1720f | 2008-05-12 21:20:43 +0200 | [diff] [blame] | 112 | extern int ftrace_ip_converted(unsigned long ip); |
Steven Rostedt | d61f82d | 2008-05-12 21:20:43 +0200 | [diff] [blame] | 113 | extern int ftrace_dyn_arch_init(void *data); |
Steven Rostedt | d61f82d | 2008-05-12 21:20:43 +0200 | [diff] [blame] | 114 | extern int ftrace_update_ftrace_func(ftrace_func_t func); |
| 115 | extern void ftrace_caller(void); |
| 116 | extern void ftrace_call(void); |
| 117 | extern void mcount_call(void); |
Frederic Weisbecker | fb52607 | 2008-11-25 21:07:04 +0100 | [diff] [blame] | 118 | #ifdef CONFIG_FUNCTION_GRAPH_TRACER |
| 119 | extern void ftrace_graph_caller(void); |
Steven Rostedt | 5a45cfe | 2008-11-26 00:16:24 -0500 | [diff] [blame^] | 120 | extern int ftrace_enable_ftrace_graph_caller(void); |
| 121 | extern int ftrace_disable_ftrace_graph_caller(void); |
| 122 | #else |
| 123 | static inline int ftrace_enable_ftrace_graph_caller(void) { return 0; } |
| 124 | static inline int ftrace_disable_ftrace_graph_caller(void) { return 0; } |
Frederic Weisbecker | e7d3737 | 2008-11-16 06:02:06 +0100 | [diff] [blame] | 125 | #endif |
Steven Rostedt | ad90c0e | 2008-05-27 20:48:37 -0400 | [diff] [blame] | 126 | |
Steven Rostedt | 593eb8a | 2008-10-23 09:32:59 -0400 | [diff] [blame] | 127 | /** |
Steven Rostedt | 31e8890 | 2008-11-14 16:21:19 -0800 | [diff] [blame] | 128 | * ftrace_make_nop - convert code into top |
| 129 | * @mod: module structure if called by module load initialization |
| 130 | * @rec: the mcount call site record |
| 131 | * @addr: the address that the call site should be calling |
Steven Rostedt | 593eb8a | 2008-10-23 09:32:59 -0400 | [diff] [blame] | 132 | * |
| 133 | * This is a very sensitive operation and great care needs |
| 134 | * to be taken by the arch. The operation should carefully |
| 135 | * read the location, check to see if what is read is indeed |
| 136 | * what we expect it to be, and then on success of the compare, |
| 137 | * it should write to the location. |
| 138 | * |
Steven Rostedt | 31e8890 | 2008-11-14 16:21:19 -0800 | [diff] [blame] | 139 | * The code segment at @rec->ip should be a caller to @addr |
| 140 | * |
Steven Rostedt | 593eb8a | 2008-10-23 09:32:59 -0400 | [diff] [blame] | 141 | * Return must be: |
| 142 | * 0 on success |
| 143 | * -EFAULT on error reading the location |
| 144 | * -EINVAL on a failed compare of the contents |
| 145 | * -EPERM on error writing to the location |
| 146 | * Any other value will be considered a failure. |
| 147 | */ |
Steven Rostedt | 31e8890 | 2008-11-14 16:21:19 -0800 | [diff] [blame] | 148 | extern int ftrace_make_nop(struct module *mod, |
| 149 | struct dyn_ftrace *rec, unsigned long addr); |
| 150 | |
| 151 | /** |
| 152 | * ftrace_make_call - convert a nop call site into a call to addr |
| 153 | * @rec: the mcount call site record |
| 154 | * @addr: the address that the call site should call |
| 155 | * |
| 156 | * This is a very sensitive operation and great care needs |
| 157 | * to be taken by the arch. The operation should carefully |
| 158 | * read the location, check to see if what is read is indeed |
| 159 | * what we expect it to be, and then on success of the compare, |
| 160 | * it should write to the location. |
| 161 | * |
| 162 | * The code segment at @rec->ip should be a nop |
| 163 | * |
| 164 | * Return must be: |
| 165 | * 0 on success |
| 166 | * -EFAULT on error reading the location |
| 167 | * -EINVAL on a failed compare of the contents |
| 168 | * -EPERM on error writing to the location |
| 169 | * Any other value will be considered a failure. |
| 170 | */ |
| 171 | extern int ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr); |
| 172 | |
| 173 | |
| 174 | /* May be defined in arch */ |
| 175 | extern int ftrace_arch_read_dyn_info(char *buf, int size); |
Steven Rostedt | 593eb8a | 2008-10-23 09:32:59 -0400 | [diff] [blame] | 176 | |
Abhishek Sagar | ecea656 | 2008-06-21 23:47:53 +0530 | [diff] [blame] | 177 | extern int skip_trace(unsigned long ip); |
| 178 | |
Steven Rostedt | c0719e5 | 2008-09-06 01:06:03 -0400 | [diff] [blame] | 179 | extern void ftrace_release(void *start, unsigned long size); |
| 180 | |
| 181 | extern void ftrace_disable_daemon(void); |
| 182 | extern void ftrace_enable_daemon(void); |
Steven Rostedt | e1c08bd | 2008-05-12 21:20:44 +0200 | [diff] [blame] | 183 | #else |
Abhishek Sagar | ecea656 | 2008-06-21 23:47:53 +0530 | [diff] [blame] | 184 | # define skip_trace(ip) ({ 0; }) |
Ingo Molnar | aeaee8a | 2008-05-12 21:20:49 +0200 | [diff] [blame] | 185 | # define ftrace_force_update() ({ 0; }) |
| 186 | # define ftrace_set_filter(buf, len, reset) do { } while (0) |
Steven Rostedt | ad90c0e | 2008-05-27 20:48:37 -0400 | [diff] [blame] | 187 | # define ftrace_disable_daemon() do { } while (0) |
| 188 | # define ftrace_enable_daemon() do { } while (0) |
Steven Rostedt | c0719e5 | 2008-09-06 01:06:03 -0400 | [diff] [blame] | 189 | static inline void ftrace_release(void *start, unsigned long size) { } |
Abhishek Sagar | ecea656 | 2008-06-21 23:47:53 +0530 | [diff] [blame] | 190 | #endif /* CONFIG_DYNAMIC_FTRACE */ |
Steven Rostedt | 352ad25 | 2008-05-12 21:20:42 +0200 | [diff] [blame] | 191 | |
Ingo Molnar | aeaee8a | 2008-05-12 21:20:49 +0200 | [diff] [blame] | 192 | /* totally disable ftrace - can not re-enable after this */ |
| 193 | void ftrace_kill(void); |
| 194 | |
Ingo Molnar | f43fdad | 2008-05-12 21:20:43 +0200 | [diff] [blame] | 195 | static inline void tracer_disable(void) |
| 196 | { |
Steven Rostedt | 606576c | 2008-10-06 19:06:12 -0400 | [diff] [blame] | 197 | #ifdef CONFIG_FUNCTION_TRACER |
Ingo Molnar | f43fdad | 2008-05-12 21:20:43 +0200 | [diff] [blame] | 198 | ftrace_enabled = 0; |
| 199 | #endif |
| 200 | } |
| 201 | |
Huang Ying | 3700273 | 2008-08-18 16:24:56 +0800 | [diff] [blame] | 202 | /* |
| 203 | * Ftrace disable/restore without lock. Some synchronization mechanism |
Huang Ying | 9bdeb7b | 2008-08-15 00:40:25 -0700 | [diff] [blame] | 204 | * must be used to prevent ftrace_enabled to be changed between |
Huang Ying | 3700273 | 2008-08-18 16:24:56 +0800 | [diff] [blame] | 205 | * disable/restore. |
| 206 | */ |
Huang Ying | 9bdeb7b | 2008-08-15 00:40:25 -0700 | [diff] [blame] | 207 | static inline int __ftrace_enabled_save(void) |
| 208 | { |
Steven Rostedt | 606576c | 2008-10-06 19:06:12 -0400 | [diff] [blame] | 209 | #ifdef CONFIG_FUNCTION_TRACER |
Huang Ying | 9bdeb7b | 2008-08-15 00:40:25 -0700 | [diff] [blame] | 210 | int saved_ftrace_enabled = ftrace_enabled; |
| 211 | ftrace_enabled = 0; |
| 212 | return saved_ftrace_enabled; |
| 213 | #else |
| 214 | return 0; |
| 215 | #endif |
| 216 | } |
| 217 | |
| 218 | static inline void __ftrace_enabled_restore(int enabled) |
| 219 | { |
Steven Rostedt | 606576c | 2008-10-06 19:06:12 -0400 | [diff] [blame] | 220 | #ifdef CONFIG_FUNCTION_TRACER |
Huang Ying | 9bdeb7b | 2008-08-15 00:40:25 -0700 | [diff] [blame] | 221 | ftrace_enabled = enabled; |
| 222 | #endif |
| 223 | } |
| 224 | |
Steven Rostedt | 352ad25 | 2008-05-12 21:20:42 +0200 | [diff] [blame] | 225 | #ifdef CONFIG_FRAME_POINTER |
| 226 | /* TODO: need to fix this for ARM */ |
| 227 | # define CALLER_ADDR0 ((unsigned long)__builtin_return_address(0)) |
| 228 | # define CALLER_ADDR1 ((unsigned long)__builtin_return_address(1)) |
| 229 | # define CALLER_ADDR2 ((unsigned long)__builtin_return_address(2)) |
| 230 | # define CALLER_ADDR3 ((unsigned long)__builtin_return_address(3)) |
| 231 | # define CALLER_ADDR4 ((unsigned long)__builtin_return_address(4)) |
| 232 | # define CALLER_ADDR5 ((unsigned long)__builtin_return_address(5)) |
Ingo Molnar | 86387f7 | 2008-05-12 21:20:51 +0200 | [diff] [blame] | 233 | # define CALLER_ADDR6 ((unsigned long)__builtin_return_address(6)) |
Steven Rostedt | 352ad25 | 2008-05-12 21:20:42 +0200 | [diff] [blame] | 234 | #else |
| 235 | # define CALLER_ADDR0 ((unsigned long)__builtin_return_address(0)) |
| 236 | # define CALLER_ADDR1 0UL |
| 237 | # define CALLER_ADDR2 0UL |
| 238 | # define CALLER_ADDR3 0UL |
| 239 | # define CALLER_ADDR4 0UL |
| 240 | # define CALLER_ADDR5 0UL |
Ingo Molnar | 86387f7 | 2008-05-12 21:20:51 +0200 | [diff] [blame] | 241 | # define CALLER_ADDR6 0UL |
Steven Rostedt | 352ad25 | 2008-05-12 21:20:42 +0200 | [diff] [blame] | 242 | #endif |
| 243 | |
Steven Rostedt | 81d68a9 | 2008-05-12 21:20:42 +0200 | [diff] [blame] | 244 | #ifdef CONFIG_IRQSOFF_TRACER |
Ingo Molnar | 489f139 | 2008-02-25 13:38:05 +0100 | [diff] [blame] | 245 | extern void time_hardirqs_on(unsigned long a0, unsigned long a1); |
| 246 | extern void time_hardirqs_off(unsigned long a0, unsigned long a1); |
Steven Rostedt | 81d68a9 | 2008-05-12 21:20:42 +0200 | [diff] [blame] | 247 | #else |
| 248 | # define time_hardirqs_on(a0, a1) do { } while (0) |
| 249 | # define time_hardirqs_off(a0, a1) do { } while (0) |
| 250 | #endif |
| 251 | |
Steven Rostedt | 6cd8a4b | 2008-05-12 21:20:42 +0200 | [diff] [blame] | 252 | #ifdef CONFIG_PREEMPT_TRACER |
Ingo Molnar | 489f139 | 2008-02-25 13:38:05 +0100 | [diff] [blame] | 253 | extern void trace_preempt_on(unsigned long a0, unsigned long a1); |
| 254 | extern void trace_preempt_off(unsigned long a0, unsigned long a1); |
Steven Rostedt | 6cd8a4b | 2008-05-12 21:20:42 +0200 | [diff] [blame] | 255 | #else |
| 256 | # define trace_preempt_on(a0, a1) do { } while (0) |
| 257 | # define trace_preempt_off(a0, a1) do { } while (0) |
| 258 | #endif |
| 259 | |
Ingo Molnar | b1829d2 | 2008-05-28 01:22:08 +0200 | [diff] [blame] | 260 | #ifdef CONFIG_TRACING |
Steven Rostedt | 944ac42 | 2008-10-23 19:26:08 -0400 | [diff] [blame] | 261 | extern int ftrace_dump_on_oops; |
| 262 | |
Steven Rostedt | 0f04870 | 2008-11-05 16:05:44 -0500 | [diff] [blame] | 263 | extern void tracing_start(void); |
| 264 | extern void tracing_stop(void); |
Steven Rostedt | 69bb54e | 2008-11-21 12:59:38 -0500 | [diff] [blame] | 265 | extern void ftrace_off_permanent(void); |
Steven Rostedt | 0f04870 | 2008-11-05 16:05:44 -0500 | [diff] [blame] | 266 | |
Ingo Molnar | 74f4e36 | 2008-05-12 21:21:15 +0200 | [diff] [blame] | 267 | extern void |
| 268 | ftrace_special(unsigned long arg1, unsigned long arg2, unsigned long arg3); |
Steven Rostedt | 2f2c99d | 2008-08-01 16:45:49 -0400 | [diff] [blame] | 269 | |
| 270 | /** |
| 271 | * ftrace_printk - printf formatting in the ftrace buffer |
| 272 | * @fmt: the printf format for printing |
| 273 | * |
| 274 | * Note: __ftrace_printk is an internal function for ftrace_printk and |
| 275 | * the @ip is passed in via the ftrace_printk macro. |
| 276 | * |
| 277 | * This function allows a kernel developer to debug fast path sections |
| 278 | * that printk is not appropriate for. By scattering in various |
| 279 | * printk like tracing in the code, a developer can quickly see |
| 280 | * where problems are occurring. |
| 281 | * |
| 282 | * This is intended as a debugging tool for the developer only. |
| 283 | * Please refrain from leaving ftrace_printks scattered around in |
| 284 | * your code. |
| 285 | */ |
| 286 | # define ftrace_printk(fmt...) __ftrace_printk(_THIS_IP_, fmt) |
Steven Rostedt | dd0e545 | 2008-08-01 12:26:41 -0400 | [diff] [blame] | 287 | extern int |
| 288 | __ftrace_printk(unsigned long ip, const char *fmt, ...) |
| 289 | __attribute__ ((format (printf, 2, 3))); |
Steven Rostedt | 3f5a54e | 2008-07-30 22:36:46 -0400 | [diff] [blame] | 290 | extern void ftrace_dump(void); |
Ingo Molnar | 74f4e36 | 2008-05-12 21:21:15 +0200 | [diff] [blame] | 291 | #else |
| 292 | static inline void |
| 293 | ftrace_special(unsigned long arg1, unsigned long arg2, unsigned long arg3) { } |
Steven Rostedt | dd0e545 | 2008-08-01 12:26:41 -0400 | [diff] [blame] | 294 | static inline int |
Ingo Molnar | 7b928c2 | 2008-08-15 17:48:02 +0200 | [diff] [blame] | 295 | ftrace_printk(const char *fmt, ...) __attribute__ ((format (printf, 1, 0))); |
| 296 | |
Steven Rostedt | 0f04870 | 2008-11-05 16:05:44 -0500 | [diff] [blame] | 297 | static inline void tracing_start(void) { } |
| 298 | static inline void tracing_stop(void) { } |
Steven Rostedt | 69bb54e | 2008-11-21 12:59:38 -0500 | [diff] [blame] | 299 | static inline void ftrace_off_permanent(void) { } |
Ingo Molnar | 7b928c2 | 2008-08-15 17:48:02 +0200 | [diff] [blame] | 300 | static inline int |
| 301 | ftrace_printk(const char *fmt, ...) |
Steven Rostedt | dd0e545 | 2008-08-01 12:26:41 -0400 | [diff] [blame] | 302 | { |
| 303 | return 0; |
| 304 | } |
Steven Rostedt | 3f5a54e | 2008-07-30 22:36:46 -0400 | [diff] [blame] | 305 | static inline void ftrace_dump(void) { } |
Ingo Molnar | 74f4e36 | 2008-05-12 21:21:15 +0200 | [diff] [blame] | 306 | #endif |
| 307 | |
Steven Rostedt | 68bf21a | 2008-08-14 15:45:08 -0400 | [diff] [blame] | 308 | #ifdef CONFIG_FTRACE_MCOUNT_RECORD |
| 309 | extern void ftrace_init(void); |
Steven Rostedt | 31e8890 | 2008-11-14 16:21:19 -0800 | [diff] [blame] | 310 | extern void ftrace_init_module(struct module *mod, |
| 311 | unsigned long *start, unsigned long *end); |
Steven Rostedt | 68bf21a | 2008-08-14 15:45:08 -0400 | [diff] [blame] | 312 | #else |
| 313 | static inline void ftrace_init(void) { } |
Steven Rostedt | 90d595f | 2008-08-14 15:45:09 -0400 | [diff] [blame] | 314 | static inline void |
Steven Rostedt | 31e8890 | 2008-11-14 16:21:19 -0800 | [diff] [blame] | 315 | ftrace_init_module(struct module *mod, |
| 316 | unsigned long *start, unsigned long *end) { } |
Steven Rostedt | 68bf21a | 2008-08-14 15:45:08 -0400 | [diff] [blame] | 317 | #endif |
| 318 | |
Steven Rostedt | dd0e545 | 2008-08-01 12:26:41 -0400 | [diff] [blame] | 319 | |
Frederic Weisbecker | 71566a0 | 2008-10-31 12:57:20 +0100 | [diff] [blame] | 320 | /* |
Frederic Weisbecker | 287b6e6 | 2008-11-26 00:57:25 +0100 | [diff] [blame] | 321 | * Structure that defines an entry function trace. |
| 322 | */ |
| 323 | struct ftrace_graph_ent { |
| 324 | unsigned long func; /* Current function */ |
| 325 | int depth; |
| 326 | }; |
| 327 | |
| 328 | /* |
Frederic Weisbecker | caf4b32 | 2008-11-11 07:03:45 +0100 | [diff] [blame] | 329 | * Structure that defines a return function trace. |
| 330 | */ |
Frederic Weisbecker | fb52607 | 2008-11-25 21:07:04 +0100 | [diff] [blame] | 331 | struct ftrace_graph_ret { |
Frederic Weisbecker | caf4b32 | 2008-11-11 07:03:45 +0100 | [diff] [blame] | 332 | unsigned long func; /* Current function */ |
| 333 | unsigned long long calltime; |
| 334 | unsigned long long rettime; |
Frederic Weisbecker | 0231022 | 2008-11-17 03:22:41 +0100 | [diff] [blame] | 335 | /* Number of functions that overran the depth limit for current task */ |
| 336 | unsigned long overrun; |
Frederic Weisbecker | 287b6e6 | 2008-11-26 00:57:25 +0100 | [diff] [blame] | 337 | int depth; |
Frederic Weisbecker | caf4b32 | 2008-11-11 07:03:45 +0100 | [diff] [blame] | 338 | }; |
| 339 | |
Frederic Weisbecker | fb52607 | 2008-11-25 21:07:04 +0100 | [diff] [blame] | 340 | #ifdef CONFIG_FUNCTION_GRAPH_TRACER |
Frederic Weisbecker | f201ae2 | 2008-11-23 06:22:56 +0100 | [diff] [blame] | 341 | #define FTRACE_RETFUNC_DEPTH 50 |
| 342 | #define FTRACE_RETSTACK_ALLOC_SIZE 32 |
Frederic Weisbecker | 287b6e6 | 2008-11-26 00:57:25 +0100 | [diff] [blame] | 343 | /* Type of the callback handlers for tracing function graph*/ |
| 344 | typedef void (*trace_func_graph_ret_t)(struct ftrace_graph_ret *); /* return */ |
| 345 | typedef void (*trace_func_graph_ent_t)(struct ftrace_graph_ent *); /* entry */ |
Frederic Weisbecker | caf4b32 | 2008-11-11 07:03:45 +0100 | [diff] [blame] | 346 | |
Frederic Weisbecker | 287b6e6 | 2008-11-26 00:57:25 +0100 | [diff] [blame] | 347 | extern int register_ftrace_graph(trace_func_graph_ret_t retfunc, |
| 348 | trace_func_graph_ent_t entryfunc); |
| 349 | |
| 350 | /* The current handlers in use */ |
| 351 | extern trace_func_graph_ret_t ftrace_graph_return; |
| 352 | extern trace_func_graph_ent_t ftrace_graph_entry; |
| 353 | |
Frederic Weisbecker | fb52607 | 2008-11-25 21:07:04 +0100 | [diff] [blame] | 354 | extern void unregister_ftrace_graph(void); |
Frederic Weisbecker | f201ae2 | 2008-11-23 06:22:56 +0100 | [diff] [blame] | 355 | |
Frederic Weisbecker | fb52607 | 2008-11-25 21:07:04 +0100 | [diff] [blame] | 356 | extern void ftrace_graph_init_task(struct task_struct *t); |
| 357 | extern void ftrace_graph_exit_task(struct task_struct *t); |
Ingo Molnar | 82f60f0 | 2008-11-23 09:18:56 +0100 | [diff] [blame] | 358 | #else |
Frederic Weisbecker | fb52607 | 2008-11-25 21:07:04 +0100 | [diff] [blame] | 359 | static inline void ftrace_graph_init_task(struct task_struct *t) { } |
| 360 | static inline void ftrace_graph_exit_task(struct task_struct *t) { } |
Frederic Weisbecker | caf4b32 | 2008-11-11 07:03:45 +0100 | [diff] [blame] | 361 | #endif |
| 362 | |
Arnaldo Carvalho de Melo | 16444a8 | 2008-05-12 21:20:42 +0200 | [diff] [blame] | 363 | #endif /* _LINUX_FTRACE_H */ |