1 /* 2 * Ftrace header. For implementation details beyond the random comments 3 * scattered below, see: Documentation/trace/ftrace-design.txt 4 */ 5 6 #ifndef _LINUX_FTRACE_H 7 #define _LINUX_FTRACE_H 8 9 #include <linux/trace_clock.h> 10 #include <linux/kallsyms.h> 11 #include <linux/linkage.h> 12 #include <linux/bitops.h> 13 #include <linux/ktime.h> 14 #include <linux/sched.h> 15 #include <linux/types.h> 16 #include <linux/init.h> 17 #include <linux/fs.h> 18 19 #include <asm/ftrace.h> 20 21 struct module; 22 struct ftrace_hash; 23 24 #ifdef CONFIG_FUNCTION_TRACER 25 26 extern int ftrace_enabled; 27 extern int 28 ftrace_enable_sysctl(struct ctl_table *table, int write, 29 void __user *buffer, size_t *lenp, 30 loff_t *ppos); 31 32 typedef void (*ftrace_func_t)(unsigned long ip, unsigned long parent_ip); 33 34 /* 35 * FTRACE_OPS_FL_* bits denote the state of ftrace_ops struct and are 36 * set in the flags member. 37 * 38 * ENABLED - set/unset when ftrace_ops is registered/unregistered 39 * GLOBAL - set manualy by ftrace_ops user to denote the ftrace_ops 40 * is part of the global tracers sharing the same filter 41 * via set_ftrace_* debugfs files. 42 * DYNAMIC - set when ftrace_ops is registered to denote dynamically 43 * allocated ftrace_ops which need special care 44 * CONTROL - set manualy by ftrace_ops user to denote the ftrace_ops 45 * could be controled by following calls: 46 * ftrace_function_local_enable 47 * ftrace_function_local_disable 48 */ 49 enum { 50 FTRACE_OPS_FL_ENABLED = 1 << 0, 51 FTRACE_OPS_FL_GLOBAL = 1 << 1, 52 FTRACE_OPS_FL_DYNAMIC = 1 << 2, 53 FTRACE_OPS_FL_CONTROL = 1 << 3, 54 }; 55 56 struct ftrace_ops { 57 ftrace_func_t func; 58 struct ftrace_ops *next; 59 unsigned long flags; 60 int __percpu *disabled; 61 #ifdef CONFIG_DYNAMIC_FTRACE 62 struct ftrace_hash *notrace_hash; 63 struct ftrace_hash *filter_hash; 64 #endif 65 }; 66 67 extern int function_trace_stop; 68 69 /* 70 * Type of the current tracing. 71 */ 72 enum ftrace_tracing_type_t { 73 FTRACE_TYPE_ENTER = 0, /* Hook the call of the function */ 74 FTRACE_TYPE_RETURN, /* Hook the return of the function */ 75 }; 76 77 /* Current tracing type, default is FTRACE_TYPE_ENTER */ 78 extern enum ftrace_tracing_type_t ftrace_tracing_type; 79 80 /** 81 * ftrace_stop - stop function tracer. 82 * 83 * A quick way to stop the function tracer. Note this an on off switch, 84 * it is not something that is recursive like preempt_disable. 85 * This does not disable the calling of mcount, it only stops the 86 * calling of functions from mcount. 87 */ 88 static inline void ftrace_stop(void) 89 { 90 function_trace_stop = 1; 91 } 92 93 /** 94 * ftrace_start - start the function tracer. 95 * 96 * This function is the inverse of ftrace_stop. This does not enable 97 * the function tracing if the function tracer is disabled. This only 98 * sets the function tracer flag to continue calling the functions 99 * from mcount. 100 */ 101 static inline void ftrace_start(void) 102 { 103 function_trace_stop = 0; 104 } 105 106 /* 107 * The ftrace_ops must be a static and should also 108 * be read_mostly. These functions do modify read_mostly variables 109 * so use them sparely. Never free an ftrace_op or modify the 110 * next pointer after it has been registered. Even after unregistering 111 * it, the next pointer may still be used internally. 112 */ 113 int register_ftrace_function(struct ftrace_ops *ops); 114 int unregister_ftrace_function(struct ftrace_ops *ops); 115 void clear_ftrace_function(void); 116 117 /** 118 * ftrace_function_local_enable - enable controlled ftrace_ops on current cpu 119 * 120 * This function enables tracing on current cpu by decreasing 121 * the per cpu control variable. 122 * It must be called with preemption disabled and only on ftrace_ops 123 * registered with FTRACE_OPS_FL_CONTROL. If called without preemption 124 * disabled, this_cpu_ptr will complain when CONFIG_DEBUG_PREEMPT is enabled. 125 */ 126 static inline void ftrace_function_local_enable(struct ftrace_ops *ops) 127 { 128 if (WARN_ON_ONCE(!(ops->flags & FTRACE_OPS_FL_CONTROL))) 129 return; 130 131 (*this_cpu_ptr(ops->disabled))--; 132 } 133 134 /** 135 * ftrace_function_local_disable - enable controlled ftrace_ops on current cpu 136 * 137 * This function enables tracing on current cpu by decreasing 138 * the per cpu control variable. 139 * It must be called with preemption disabled and only on ftrace_ops 140 * registered with FTRACE_OPS_FL_CONTROL. If called without preemption 141 * disabled, this_cpu_ptr will complain when CONFIG_DEBUG_PREEMPT is enabled. 142 */ 143 static inline void ftrace_function_local_disable(struct ftrace_ops *ops) 144 { 145 if (WARN_ON_ONCE(!(ops->flags & FTRACE_OPS_FL_CONTROL))) 146 return; 147 148 (*this_cpu_ptr(ops->disabled))++; 149 } 150 151 /** 152 * ftrace_function_local_disabled - returns ftrace_ops disabled value 153 * on current cpu 154 * 155 * This function returns value of ftrace_ops::disabled on current cpu. 156 * It must be called with preemption disabled and only on ftrace_ops 157 * registered with FTRACE_OPS_FL_CONTROL. If called without preemption 158 * disabled, this_cpu_ptr will complain when CONFIG_DEBUG_PREEMPT is enabled. 159 */ 160 static inline int ftrace_function_local_disabled(struct ftrace_ops *ops) 161 { 162 WARN_ON_ONCE(!(ops->flags & FTRACE_OPS_FL_CONTROL)); 163 return *this_cpu_ptr(ops->disabled); 164 } 165 166 extern void ftrace_stub(unsigned long a0, unsigned long a1); 167 168 #else /* !CONFIG_FUNCTION_TRACER */ 169 /* 170 * (un)register_ftrace_function must be a macro since the ops parameter 171 * must not be evaluated. 172 */ 173 #define register_ftrace_function(ops) ({ 0; }) 174 #define unregister_ftrace_function(ops) ({ 0; }) 175 static inline void clear_ftrace_function(void) { } 176 static inline void ftrace_kill(void) { } 177 static inline void ftrace_stop(void) { } 178 static inline void ftrace_start(void) { } 179 #endif /* CONFIG_FUNCTION_TRACER */ 180 181 #ifdef CONFIG_STACK_TRACER 182 extern int stack_tracer_enabled; 183 int 184 stack_trace_sysctl(struct ctl_table *table, int write, 185 void __user *buffer, size_t *lenp, 186 loff_t *ppos); 187 #endif 188 189 struct ftrace_func_command { 190 struct list_head list; 191 char *name; 192 int (*func)(struct ftrace_hash *hash, 193 char *func, char *cmd, 194 char *params, int enable); 195 }; 196 197 #ifdef CONFIG_DYNAMIC_FTRACE 198 199 int ftrace_arch_code_modify_prepare(void); 200 int ftrace_arch_code_modify_post_process(void); 201 202 void ftrace_bug(int err, unsigned long ip); 203 204 struct seq_file; 205 206 struct ftrace_probe_ops { 207 void (*func)(unsigned long ip, 208 unsigned long parent_ip, 209 void **data); 210 int (*callback)(unsigned long ip, void **data); 211 void (*free)(void **data); 212 int (*print)(struct seq_file *m, 213 unsigned long ip, 214 struct ftrace_probe_ops *ops, 215 void *data); 216 }; 217 218 extern int 219 register_ftrace_function_probe(char *glob, struct ftrace_probe_ops *ops, 220 void *data); 221 extern void 222 unregister_ftrace_function_probe(char *glob, struct ftrace_probe_ops *ops, 223 void *data); 224 extern void 225 unregister_ftrace_function_probe_func(char *glob, struct ftrace_probe_ops *ops); 226 extern void unregister_ftrace_function_probe_all(char *glob); 227 228 extern int ftrace_text_reserved(void *start, void *end); 229 230 enum { 231 FTRACE_FL_ENABLED = (1 << 30), 232 }; 233 234 #define FTRACE_FL_MASK (0x3UL << 30) 235 #define FTRACE_REF_MAX ((1 << 30) - 1) 236 237 struct dyn_ftrace { 238 union { 239 unsigned long ip; /* address of mcount call-site */ 240 struct dyn_ftrace *freelist; 241 }; 242 unsigned long flags; 243 struct dyn_arch_ftrace arch; 244 }; 245 246 int ftrace_force_update(void); 247 int ftrace_set_filter(struct ftrace_ops *ops, unsigned char *buf, 248 int len, int reset); 249 int ftrace_set_notrace(struct ftrace_ops *ops, unsigned char *buf, 250 int len, int reset); 251 void ftrace_set_global_filter(unsigned char *buf, int len, int reset); 252 void ftrace_set_global_notrace(unsigned char *buf, int len, int reset); 253 void ftrace_free_filter(struct ftrace_ops *ops); 254 255 int register_ftrace_command(struct ftrace_func_command *cmd); 256 int unregister_ftrace_command(struct ftrace_func_command *cmd); 257 258 enum { 259 FTRACE_UPDATE_CALLS = (1 << 0), 260 FTRACE_DISABLE_CALLS = (1 << 1), 261 FTRACE_UPDATE_TRACE_FUNC = (1 << 2), 262 FTRACE_START_FUNC_RET = (1 << 3), 263 FTRACE_STOP_FUNC_RET = (1 << 4), 264 }; 265 266 enum { 267 FTRACE_UPDATE_IGNORE, 268 FTRACE_UPDATE_MAKE_CALL, 269 FTRACE_UPDATE_MAKE_NOP, 270 }; 271 272 enum { 273 FTRACE_ITER_FILTER = (1 << 0), 274 FTRACE_ITER_NOTRACE = (1 << 1), 275 FTRACE_ITER_PRINTALL = (1 << 2), 276 FTRACE_ITER_DO_HASH = (1 << 3), 277 FTRACE_ITER_HASH = (1 << 4), 278 FTRACE_ITER_ENABLED = (1 << 5), 279 }; 280 281 void arch_ftrace_update_code(int command); 282 283 struct ftrace_rec_iter; 284 285 struct ftrace_rec_iter *ftrace_rec_iter_start(void); 286 struct ftrace_rec_iter *ftrace_rec_iter_next(struct ftrace_rec_iter *iter); 287 struct dyn_ftrace *ftrace_rec_iter_record(struct ftrace_rec_iter *iter); 288 289 #define for_ftrace_rec_iter(iter) \ 290 for (iter = ftrace_rec_iter_start(); \ 291 iter; \ 292 iter = ftrace_rec_iter_next(iter)) 293 294 295 int ftrace_update_record(struct dyn_ftrace *rec, int enable); 296 int ftrace_test_record(struct dyn_ftrace *rec, int enable); 297 void ftrace_run_stop_machine(int command); 298 unsigned long ftrace_location(unsigned long ip); 299 300 extern ftrace_func_t ftrace_trace_function; 301 302 int ftrace_regex_open(struct ftrace_ops *ops, int flag, 303 struct inode *inode, struct file *file); 304 ssize_t ftrace_filter_write(struct file *file, const char __user *ubuf, 305 size_t cnt, loff_t *ppos); 306 ssize_t ftrace_notrace_write(struct file *file, const char __user *ubuf, 307 size_t cnt, loff_t *ppos); 308 loff_t ftrace_regex_lseek(struct file *file, loff_t offset, int origin); 309 int ftrace_regex_release(struct inode *inode, struct file *file); 310 311 void __init 312 ftrace_set_early_filter(struct ftrace_ops *ops, char *buf, int enable); 313 314 /* defined in arch */ 315 extern int ftrace_ip_converted(unsigned long ip); 316 extern int ftrace_dyn_arch_init(void *data); 317 extern void ftrace_replace_code(int enable); 318 extern int ftrace_update_ftrace_func(ftrace_func_t func); 319 extern void ftrace_caller(void); 320 extern void ftrace_call(void); 321 extern void mcount_call(void); 322 323 void ftrace_modify_all_code(int command); 324 325 #ifndef FTRACE_ADDR 326 #define FTRACE_ADDR ((unsigned long)ftrace_caller) 327 #endif 328 #ifdef CONFIG_FUNCTION_GRAPH_TRACER 329 extern void ftrace_graph_caller(void); 330 extern int ftrace_enable_ftrace_graph_caller(void); 331 extern int ftrace_disable_ftrace_graph_caller(void); 332 #else 333 static inline int ftrace_enable_ftrace_graph_caller(void) { return 0; } 334 static inline int ftrace_disable_ftrace_graph_caller(void) { return 0; } 335 #endif 336 337 /** 338 * ftrace_make_nop - convert code into nop 339 * @mod: module structure if called by module load initialization 340 * @rec: the mcount call site record 341 * @addr: the address that the call site should be calling 342 * 343 * This is a very sensitive operation and great care needs 344 * to be taken by the arch. The operation should carefully 345 * read the location, check to see if what is read is indeed 346 * what we expect it to be, and then on success of the compare, 347 * it should write to the location. 348 * 349 * The code segment at @rec->ip should be a caller to @addr 350 * 351 * Return must be: 352 * 0 on success 353 * -EFAULT on error reading the location 354 * -EINVAL on a failed compare of the contents 355 * -EPERM on error writing to the location 356 * Any other value will be considered a failure. 357 */ 358 extern int ftrace_make_nop(struct module *mod, 359 struct dyn_ftrace *rec, unsigned long addr); 360 361 /** 362 * ftrace_make_call - convert a nop call site into a call to addr 363 * @rec: the mcount call site record 364 * @addr: the address that the call site should call 365 * 366 * This is a very sensitive operation and great care needs 367 * to be taken by the arch. The operation should carefully 368 * read the location, check to see if what is read is indeed 369 * what we expect it to be, and then on success of the compare, 370 * it should write to the location. 371 * 372 * The code segment at @rec->ip should be a nop 373 * 374 * Return must be: 375 * 0 on success 376 * -EFAULT on error reading the location 377 * -EINVAL on a failed compare of the contents 378 * -EPERM on error writing to the location 379 * Any other value will be considered a failure. 380 */ 381 extern int ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr); 382 383 /* May be defined in arch */ 384 extern int ftrace_arch_read_dyn_info(char *buf, int size); 385 386 extern int skip_trace(unsigned long ip); 387 388 extern void ftrace_disable_daemon(void); 389 extern void ftrace_enable_daemon(void); 390 #else 391 static inline int skip_trace(unsigned long ip) { return 0; } 392 static inline int ftrace_force_update(void) { return 0; } 393 static inline void ftrace_disable_daemon(void) { } 394 static inline void ftrace_enable_daemon(void) { } 395 static inline void ftrace_release_mod(struct module *mod) {} 396 static inline int register_ftrace_command(struct ftrace_func_command *cmd) 397 { 398 return -EINVAL; 399 } 400 static inline int unregister_ftrace_command(char *cmd_name) 401 { 402 return -EINVAL; 403 } 404 static inline int ftrace_text_reserved(void *start, void *end) 405 { 406 return 0; 407 } 408 409 /* 410 * Again users of functions that have ftrace_ops may not 411 * have them defined when ftrace is not enabled, but these 412 * functions may still be called. Use a macro instead of inline. 413 */ 414 #define ftrace_regex_open(ops, flag, inod, file) ({ -ENODEV; }) 415 #define ftrace_set_early_filter(ops, buf, enable) do { } while (0) 416 #define ftrace_set_filter(ops, buf, len, reset) ({ -ENODEV; }) 417 #define ftrace_set_notrace(ops, buf, len, reset) ({ -ENODEV; }) 418 #define ftrace_free_filter(ops) do { } while (0) 419 420 static inline ssize_t ftrace_filter_write(struct file *file, const char __user *ubuf, 421 size_t cnt, loff_t *ppos) { return -ENODEV; } 422 static inline ssize_t ftrace_notrace_write(struct file *file, const char __user *ubuf, 423 size_t cnt, loff_t *ppos) { return -ENODEV; } 424 static inline loff_t ftrace_regex_lseek(struct file *file, loff_t offset, int origin) 425 { 426 return -ENODEV; 427 } 428 static inline int 429 ftrace_regex_release(struct inode *inode, struct file *file) { return -ENODEV; } 430 #endif /* CONFIG_DYNAMIC_FTRACE */ 431 432 /* totally disable ftrace - can not re-enable after this */ 433 void ftrace_kill(void); 434 435 static inline void tracer_disable(void) 436 { 437 #ifdef CONFIG_FUNCTION_TRACER 438 ftrace_enabled = 0; 439 #endif 440 } 441 442 /* 443 * Ftrace disable/restore without lock. Some synchronization mechanism 444 * must be used to prevent ftrace_enabled to be changed between 445 * disable/restore. 446 */ 447 static inline int __ftrace_enabled_save(void) 448 { 449 #ifdef CONFIG_FUNCTION_TRACER 450 int saved_ftrace_enabled = ftrace_enabled; 451 ftrace_enabled = 0; 452 return saved_ftrace_enabled; 453 #else 454 return 0; 455 #endif 456 } 457 458 static inline void __ftrace_enabled_restore(int enabled) 459 { 460 #ifdef CONFIG_FUNCTION_TRACER 461 ftrace_enabled = enabled; 462 #endif 463 } 464 465 #ifndef HAVE_ARCH_CALLER_ADDR 466 # ifdef CONFIG_FRAME_POINTER 467 # define CALLER_ADDR0 ((unsigned long)__builtin_return_address(0)) 468 # define CALLER_ADDR1 ((unsigned long)__builtin_return_address(1)) 469 # define CALLER_ADDR2 ((unsigned long)__builtin_return_address(2)) 470 # define CALLER_ADDR3 ((unsigned long)__builtin_return_address(3)) 471 # define CALLER_ADDR4 ((unsigned long)__builtin_return_address(4)) 472 # define CALLER_ADDR5 ((unsigned long)__builtin_return_address(5)) 473 # define CALLER_ADDR6 ((unsigned long)__builtin_return_address(6)) 474 # else 475 # define CALLER_ADDR0 ((unsigned long)__builtin_return_address(0)) 476 # define CALLER_ADDR1 0UL 477 # define CALLER_ADDR2 0UL 478 # define CALLER_ADDR3 0UL 479 # define CALLER_ADDR4 0UL 480 # define CALLER_ADDR5 0UL 481 # define CALLER_ADDR6 0UL 482 # endif 483 #endif /* ifndef HAVE_ARCH_CALLER_ADDR */ 484 485 #ifdef CONFIG_IRQSOFF_TRACER 486 extern void time_hardirqs_on(unsigned long a0, unsigned long a1); 487 extern void time_hardirqs_off(unsigned long a0, unsigned long a1); 488 #else 489 static inline void time_hardirqs_on(unsigned long a0, unsigned long a1) { } 490 static inline void time_hardirqs_off(unsigned long a0, unsigned long a1) { } 491 #endif 492 493 #ifdef CONFIG_PREEMPT_TRACER 494 extern void trace_preempt_on(unsigned long a0, unsigned long a1); 495 extern void trace_preempt_off(unsigned long a0, unsigned long a1); 496 #else 497 /* 498 * Use defines instead of static inlines because some arches will make code out 499 * of the CALLER_ADDR, when we really want these to be a real nop. 500 */ 501 # define trace_preempt_on(a0, a1) do { } while (0) 502 # define trace_preempt_off(a0, a1) do { } while (0) 503 #endif 504 505 #ifdef CONFIG_FTRACE_MCOUNT_RECORD 506 extern void ftrace_init(void); 507 #else 508 static inline void ftrace_init(void) { } 509 #endif 510 511 /* 512 * Structure that defines an entry function trace. 513 */ 514 struct ftrace_graph_ent { 515 unsigned long func; /* Current function */ 516 int depth; 517 }; 518 519 /* 520 * Structure that defines a return function trace. 521 */ 522 struct ftrace_graph_ret { 523 unsigned long func; /* Current function */ 524 unsigned long long calltime; 525 unsigned long long rettime; 526 /* Number of functions that overran the depth limit for current task */ 527 unsigned long overrun; 528 int depth; 529 }; 530 531 /* Type of the callback handlers for tracing function graph*/ 532 typedef void (*trace_func_graph_ret_t)(struct ftrace_graph_ret *); /* return */ 533 typedef int (*trace_func_graph_ent_t)(struct ftrace_graph_ent *); /* entry */ 534 535 #ifdef CONFIG_FUNCTION_GRAPH_TRACER 536 537 /* for init task */ 538 #define INIT_FTRACE_GRAPH .ret_stack = NULL, 539 540 /* 541 * Stack of return addresses for functions 542 * of a thread. 543 * Used in struct thread_info 544 */ 545 struct ftrace_ret_stack { 546 unsigned long ret; 547 unsigned long func; 548 unsigned long long calltime; 549 unsigned long long subtime; 550 unsigned long fp; 551 }; 552 553 /* 554 * Primary handler of a function return. 555 * It relays on ftrace_return_to_handler. 556 * Defined in entry_32/64.S 557 */ 558 extern void return_to_handler(void); 559 560 extern int 561 ftrace_push_return_trace(unsigned long ret, unsigned long func, int *depth, 562 unsigned long frame_pointer); 563 564 /* 565 * Sometimes we don't want to trace a function with the function 566 * graph tracer but we want them to keep traced by the usual function 567 * tracer if the function graph tracer is not configured. 568 */ 569 #define __notrace_funcgraph notrace 570 571 /* 572 * We want to which function is an entrypoint of a hardirq. 573 * That will help us to put a signal on output. 574 */ 575 #define __irq_entry __attribute__((__section__(".irqentry.text"))) 576 577 /* Limits of hardirq entrypoints */ 578 extern char __irqentry_text_start[]; 579 extern char __irqentry_text_end[]; 580 581 #define FTRACE_RETFUNC_DEPTH 50 582 #define FTRACE_RETSTACK_ALLOC_SIZE 32 583 extern int register_ftrace_graph(trace_func_graph_ret_t retfunc, 584 trace_func_graph_ent_t entryfunc); 585 586 extern void ftrace_graph_stop(void); 587 588 /* The current handlers in use */ 589 extern trace_func_graph_ret_t ftrace_graph_return; 590 extern trace_func_graph_ent_t ftrace_graph_entry; 591 592 extern void unregister_ftrace_graph(void); 593 594 extern void ftrace_graph_init_task(struct task_struct *t); 595 extern void ftrace_graph_exit_task(struct task_struct *t); 596 extern void ftrace_graph_init_idle_task(struct task_struct *t, int cpu); 597 598 static inline int task_curr_ret_stack(struct task_struct *t) 599 { 600 return t->curr_ret_stack; 601 } 602 603 static inline void pause_graph_tracing(void) 604 { 605 atomic_inc(¤t->tracing_graph_pause); 606 } 607 608 static inline void unpause_graph_tracing(void) 609 { 610 atomic_dec(¤t->tracing_graph_pause); 611 } 612 #else /* !CONFIG_FUNCTION_GRAPH_TRACER */ 613 614 #define __notrace_funcgraph 615 #define __irq_entry 616 #define INIT_FTRACE_GRAPH 617 618 static inline void ftrace_graph_init_task(struct task_struct *t) { } 619 static inline void ftrace_graph_exit_task(struct task_struct *t) { } 620 static inline void ftrace_graph_init_idle_task(struct task_struct *t, int cpu) { } 621 622 static inline int register_ftrace_graph(trace_func_graph_ret_t retfunc, 623 trace_func_graph_ent_t entryfunc) 624 { 625 return -1; 626 } 627 static inline void unregister_ftrace_graph(void) { } 628 629 static inline int task_curr_ret_stack(struct task_struct *tsk) 630 { 631 return -1; 632 } 633 634 static inline void pause_graph_tracing(void) { } 635 static inline void unpause_graph_tracing(void) { } 636 #endif /* CONFIG_FUNCTION_GRAPH_TRACER */ 637 638 #ifdef CONFIG_TRACING 639 640 /* flags for current->trace */ 641 enum { 642 TSK_TRACE_FL_TRACE_BIT = 0, 643 TSK_TRACE_FL_GRAPH_BIT = 1, 644 }; 645 enum { 646 TSK_TRACE_FL_TRACE = 1 << TSK_TRACE_FL_TRACE_BIT, 647 TSK_TRACE_FL_GRAPH = 1 << TSK_TRACE_FL_GRAPH_BIT, 648 }; 649 650 static inline void set_tsk_trace_trace(struct task_struct *tsk) 651 { 652 set_bit(TSK_TRACE_FL_TRACE_BIT, &tsk->trace); 653 } 654 655 static inline void clear_tsk_trace_trace(struct task_struct *tsk) 656 { 657 clear_bit(TSK_TRACE_FL_TRACE_BIT, &tsk->trace); 658 } 659 660 static inline int test_tsk_trace_trace(struct task_struct *tsk) 661 { 662 return tsk->trace & TSK_TRACE_FL_TRACE; 663 } 664 665 static inline void set_tsk_trace_graph(struct task_struct *tsk) 666 { 667 set_bit(TSK_TRACE_FL_GRAPH_BIT, &tsk->trace); 668 } 669 670 static inline void clear_tsk_trace_graph(struct task_struct *tsk) 671 { 672 clear_bit(TSK_TRACE_FL_GRAPH_BIT, &tsk->trace); 673 } 674 675 static inline int test_tsk_trace_graph(struct task_struct *tsk) 676 { 677 return tsk->trace & TSK_TRACE_FL_GRAPH; 678 } 679 680 enum ftrace_dump_mode; 681 682 extern enum ftrace_dump_mode ftrace_dump_on_oops; 683 684 #ifdef CONFIG_PREEMPT 685 #define INIT_TRACE_RECURSION .trace_recursion = 0, 686 #endif 687 688 #endif /* CONFIG_TRACING */ 689 690 #ifndef INIT_TRACE_RECURSION 691 #define INIT_TRACE_RECURSION 692 #endif 693 694 #ifdef CONFIG_FTRACE_SYSCALLS 695 696 unsigned long arch_syscall_addr(int nr); 697 698 #endif /* CONFIG_FTRACE_SYSCALLS */ 699 700 #endif /* _LINUX_FTRACE_H */ 701