1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* |
3 | * Common header file for probe-based Dynamic events. |
4 | * |
5 | * This code was copied from kernel/trace/trace_kprobe.h written by |
6 | * Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> |
7 | * |
8 | * Updates to make this generic: |
9 | * Copyright (C) IBM Corporation, 2010-2011 |
10 | * Author: Srikar Dronamraju |
11 | */ |
12 | |
13 | #include <linux/seq_file.h> |
14 | #include <linux/slab.h> |
15 | #include <linux/smp.h> |
16 | #include <linux/tracefs.h> |
17 | #include <linux/types.h> |
18 | #include <linux/string.h> |
19 | #include <linux/ptrace.h> |
20 | #include <linux/perf_event.h> |
21 | #include <linux/kprobes.h> |
22 | #include <linux/stringify.h> |
23 | #include <linux/limits.h> |
24 | #include <linux/uaccess.h> |
25 | #include <linux/bitops.h> |
26 | #include <linux/btf.h> |
27 | #include <asm/bitsperlong.h> |
28 | |
29 | #include "trace.h" |
30 | #include "trace_output.h" |
31 | |
32 | #define MAX_TRACE_ARGS 128 |
33 | #define MAX_ARGSTR_LEN 63 |
34 | #define MAX_ARRAY_LEN 64 |
35 | #define MAX_ARG_NAME_LEN 32 |
36 | #define MAX_BTF_ARGS_LEN 128 |
37 | #define MAX_STRING_SIZE PATH_MAX |
38 | #define MAX_ARG_BUF_LEN (MAX_TRACE_ARGS * MAX_ARG_NAME_LEN) |
39 | |
40 | /* Reserved field names */ |
41 | #define FIELD_STRING_IP "__probe_ip" |
42 | #define FIELD_STRING_RETIP "__probe_ret_ip" |
43 | #define FIELD_STRING_FUNC "__probe_func" |
44 | |
45 | #undef DEFINE_FIELD |
46 | #define DEFINE_FIELD(type, item, name, is_signed) \ |
47 | do { \ |
48 | ret = trace_define_field(event_call, #type, name, \ |
49 | offsetof(typeof(field), item), \ |
50 | sizeof(field.item), is_signed, \ |
51 | FILTER_OTHER); \ |
52 | if (ret) \ |
53 | return ret; \ |
54 | } while (0) |
55 | |
56 | |
57 | /* Flags for trace_probe */ |
58 | #define TP_FLAG_TRACE 1 |
59 | #define TP_FLAG_PROFILE 2 |
60 | |
61 | /* data_loc: data location, compatible with u32 */ |
62 | #define make_data_loc(len, offs) \ |
63 | (((u32)(len) << 16) | ((u32)(offs) & 0xffff)) |
64 | #define get_loc_len(dl) ((u32)(dl) >> 16) |
65 | #define get_loc_offs(dl) ((u32)(dl) & 0xffff) |
66 | |
67 | static nokprobe_inline void *get_loc_data(u32 *dl, void *ent) |
68 | { |
69 | return (u8 *)ent + get_loc_offs(*dl); |
70 | } |
71 | |
72 | static nokprobe_inline u32 update_data_loc(u32 loc, int consumed) |
73 | { |
74 | u32 maxlen = get_loc_len(loc); |
75 | u32 offset = get_loc_offs(loc); |
76 | |
77 | return make_data_loc(maxlen - consumed, offset + consumed); |
78 | } |
79 | |
80 | /* Printing function type */ |
81 | typedef int (*print_type_func_t)(struct trace_seq *, void *, void *); |
82 | |
83 | enum fetch_op { |
84 | FETCH_OP_NOP = 0, |
85 | // Stage 1 (load) ops |
86 | FETCH_OP_REG, /* Register : .param = offset */ |
87 | FETCH_OP_STACK, /* Stack : .param = index */ |
88 | FETCH_OP_STACKP, /* Stack pointer */ |
89 | FETCH_OP_RETVAL, /* Return value */ |
90 | FETCH_OP_IMM, /* Immediate : .immediate */ |
91 | FETCH_OP_COMM, /* Current comm */ |
92 | FETCH_OP_ARG, /* Function argument : .param */ |
93 | FETCH_OP_FOFFS, /* File offset: .immediate */ |
94 | FETCH_OP_DATA, /* Allocated data: .data */ |
95 | // Stage 2 (dereference) op |
96 | FETCH_OP_DEREF, /* Dereference: .offset */ |
97 | FETCH_OP_UDEREF, /* User-space Dereference: .offset */ |
98 | // Stage 3 (store) ops |
99 | FETCH_OP_ST_RAW, /* Raw: .size */ |
100 | FETCH_OP_ST_MEM, /* Mem: .offset, .size */ |
101 | FETCH_OP_ST_UMEM, /* Mem: .offset, .size */ |
102 | FETCH_OP_ST_STRING, /* String: .offset, .size */ |
103 | FETCH_OP_ST_USTRING, /* User String: .offset, .size */ |
104 | FETCH_OP_ST_SYMSTR, /* Kernel Symbol String: .offset, .size */ |
105 | // Stage 4 (modify) op |
106 | FETCH_OP_MOD_BF, /* Bitfield: .basesize, .lshift, .rshift */ |
107 | // Stage 5 (loop) op |
108 | FETCH_OP_LP_ARRAY, /* Array: .param = loop count */ |
109 | FETCH_OP_TP_ARG, /* Trace Point argument */ |
110 | FETCH_OP_END, |
111 | FETCH_NOP_SYMBOL, /* Unresolved Symbol holder */ |
112 | }; |
113 | |
114 | struct fetch_insn { |
115 | enum fetch_op op; |
116 | union { |
117 | unsigned int param; |
118 | struct { |
119 | unsigned int size; |
120 | int offset; |
121 | }; |
122 | struct { |
123 | unsigned char basesize; |
124 | unsigned char lshift; |
125 | unsigned char rshift; |
126 | }; |
127 | unsigned long immediate; |
128 | void *data; |
129 | }; |
130 | }; |
131 | |
132 | /* fetch + deref*N + store + mod + end <= 16, this allows N=12, enough */ |
133 | #define FETCH_INSN_MAX 16 |
134 | #define FETCH_TOKEN_COMM (-ECOMM) |
135 | |
136 | /* Fetch type information table */ |
137 | struct fetch_type { |
138 | const char *name; /* Name of type */ |
139 | size_t size; /* Byte size of type */ |
140 | bool is_signed; /* Signed flag */ |
141 | bool is_string; /* String flag */ |
142 | print_type_func_t print; /* Print functions */ |
143 | const char *fmt; /* Format string */ |
144 | const char *fmttype; /* Name in format file */ |
145 | }; |
146 | |
147 | /* For defining macros, define string/string_size types */ |
148 | typedef u32 string; |
149 | typedef u32 string_size; |
150 | |
151 | #define PRINT_TYPE_FUNC_NAME(type) print_type_##type |
152 | #define PRINT_TYPE_FMT_NAME(type) print_type_format_##type |
153 | |
154 | /* Printing in basic type function template */ |
155 | #define DECLARE_BASIC_PRINT_TYPE_FUNC(type) \ |
156 | int PRINT_TYPE_FUNC_NAME(type)(struct trace_seq *s, void *data, void *ent);\ |
157 | extern const char PRINT_TYPE_FMT_NAME(type)[] |
158 | |
159 | DECLARE_BASIC_PRINT_TYPE_FUNC(u8); |
160 | DECLARE_BASIC_PRINT_TYPE_FUNC(u16); |
161 | DECLARE_BASIC_PRINT_TYPE_FUNC(u32); |
162 | DECLARE_BASIC_PRINT_TYPE_FUNC(u64); |
163 | DECLARE_BASIC_PRINT_TYPE_FUNC(s8); |
164 | DECLARE_BASIC_PRINT_TYPE_FUNC(s16); |
165 | DECLARE_BASIC_PRINT_TYPE_FUNC(s32); |
166 | DECLARE_BASIC_PRINT_TYPE_FUNC(s64); |
167 | DECLARE_BASIC_PRINT_TYPE_FUNC(x8); |
168 | DECLARE_BASIC_PRINT_TYPE_FUNC(x16); |
169 | DECLARE_BASIC_PRINT_TYPE_FUNC(x32); |
170 | DECLARE_BASIC_PRINT_TYPE_FUNC(x64); |
171 | |
172 | DECLARE_BASIC_PRINT_TYPE_FUNC(char); |
173 | DECLARE_BASIC_PRINT_TYPE_FUNC(string); |
174 | DECLARE_BASIC_PRINT_TYPE_FUNC(symbol); |
175 | |
176 | /* Default (unsigned long) fetch type */ |
177 | #define __DEFAULT_FETCH_TYPE(t) x##t |
178 | #define _DEFAULT_FETCH_TYPE(t) __DEFAULT_FETCH_TYPE(t) |
179 | #define DEFAULT_FETCH_TYPE _DEFAULT_FETCH_TYPE(BITS_PER_LONG) |
180 | #define DEFAULT_FETCH_TYPE_STR __stringify(DEFAULT_FETCH_TYPE) |
181 | |
182 | #define __ADDR_FETCH_TYPE(t) u##t |
183 | #define _ADDR_FETCH_TYPE(t) __ADDR_FETCH_TYPE(t) |
184 | #define ADDR_FETCH_TYPE _ADDR_FETCH_TYPE(BITS_PER_LONG) |
185 | |
186 | #define __ASSIGN_FETCH_TYPE(_name, ptype, ftype, _size, sign, str, _fmttype) \ |
187 | {.name = _name, \ |
188 | .size = _size, \ |
189 | .is_signed = (bool)sign, \ |
190 | .is_string = (bool)str, \ |
191 | .print = PRINT_TYPE_FUNC_NAME(ptype), \ |
192 | .fmt = PRINT_TYPE_FMT_NAME(ptype), \ |
193 | .fmttype = _fmttype, \ |
194 | } |
195 | |
196 | /* Non string types can use these macros */ |
197 | #define _ASSIGN_FETCH_TYPE(_name, ptype, ftype, _size, sign, _fmttype) \ |
198 | __ASSIGN_FETCH_TYPE(_name, ptype, ftype, _size, sign, 0, #_fmttype) |
199 | #define ASSIGN_FETCH_TYPE(ptype, ftype, sign) \ |
200 | _ASSIGN_FETCH_TYPE(#ptype, ptype, ftype, sizeof(ftype), sign, ptype) |
201 | |
202 | /* If ptype is an alias of atype, use this macro (show atype in format) */ |
203 | #define ASSIGN_FETCH_TYPE_ALIAS(ptype, atype, ftype, sign) \ |
204 | _ASSIGN_FETCH_TYPE(#ptype, ptype, ftype, sizeof(ftype), sign, atype) |
205 | |
206 | #define ASSIGN_FETCH_TYPE_END {} |
207 | #define MAX_ARRAY_LEN 64 |
208 | |
209 | #ifdef CONFIG_KPROBE_EVENTS |
210 | bool trace_kprobe_on_func_entry(struct trace_event_call *call); |
211 | bool trace_kprobe_error_injectable(struct trace_event_call *call); |
212 | #else |
213 | static inline bool trace_kprobe_on_func_entry(struct trace_event_call *call) |
214 | { |
215 | return false; |
216 | } |
217 | |
218 | static inline bool trace_kprobe_error_injectable(struct trace_event_call *call) |
219 | { |
220 | return false; |
221 | } |
222 | #endif /* CONFIG_KPROBE_EVENTS */ |
223 | |
224 | struct probe_arg { |
225 | struct fetch_insn *code; |
226 | bool dynamic;/* Dynamic array (string) is used */ |
227 | unsigned int offset; /* Offset from argument entry */ |
228 | unsigned int count; /* Array count */ |
229 | const char *name; /* Name of this argument */ |
230 | const char *comm; /* Command of this argument */ |
231 | char *fmt; /* Format string if needed */ |
232 | const struct fetch_type *type; /* Type of this argument */ |
233 | }; |
234 | |
235 | struct trace_uprobe_filter { |
236 | rwlock_t rwlock; |
237 | int nr_systemwide; |
238 | struct list_head perf_events; |
239 | }; |
240 | |
241 | /* Event call and class holder */ |
242 | struct trace_probe_event { |
243 | unsigned int flags; /* For TP_FLAG_* */ |
244 | struct trace_event_class class; |
245 | struct trace_event_call call; |
246 | struct list_head files; |
247 | struct list_head probes; |
248 | struct trace_uprobe_filter filter[]; |
249 | }; |
250 | |
251 | struct trace_probe { |
252 | struct list_head list; |
253 | struct trace_probe_event *event; |
254 | ssize_t size; /* trace entry size */ |
255 | unsigned int nr_args; |
256 | struct probe_arg args[]; |
257 | }; |
258 | |
259 | struct event_file_link { |
260 | struct trace_event_file *file; |
261 | struct list_head list; |
262 | }; |
263 | |
264 | static inline bool trace_probe_test_flag(struct trace_probe *tp, |
265 | unsigned int flag) |
266 | { |
267 | return !!(tp->event->flags & flag); |
268 | } |
269 | |
270 | static inline void trace_probe_set_flag(struct trace_probe *tp, |
271 | unsigned int flag) |
272 | { |
273 | tp->event->flags |= flag; |
274 | } |
275 | |
276 | static inline void trace_probe_clear_flag(struct trace_probe *tp, |
277 | unsigned int flag) |
278 | { |
279 | tp->event->flags &= ~flag; |
280 | } |
281 | |
282 | static inline bool trace_probe_is_enabled(struct trace_probe *tp) |
283 | { |
284 | return trace_probe_test_flag(tp, TP_FLAG_TRACE | TP_FLAG_PROFILE); |
285 | } |
286 | |
287 | static inline const char *trace_probe_name(struct trace_probe *tp) |
288 | { |
289 | return trace_event_name(call: &tp->event->call); |
290 | } |
291 | |
292 | static inline const char *trace_probe_group_name(struct trace_probe *tp) |
293 | { |
294 | return tp->event->call.class->system; |
295 | } |
296 | |
297 | static inline struct trace_event_call * |
298 | trace_probe_event_call(struct trace_probe *tp) |
299 | { |
300 | return &tp->event->call; |
301 | } |
302 | |
303 | static inline struct trace_probe_event * |
304 | trace_probe_event_from_call(struct trace_event_call *event_call) |
305 | { |
306 | return container_of(event_call, struct trace_probe_event, call); |
307 | } |
308 | |
309 | static inline struct trace_probe * |
310 | trace_probe_primary_from_call(struct trace_event_call *call) |
311 | { |
312 | struct trace_probe_event *tpe = trace_probe_event_from_call(event_call: call); |
313 | |
314 | return list_first_entry_or_null(&tpe->probes, struct trace_probe, list); |
315 | } |
316 | |
317 | static inline struct list_head *trace_probe_probe_list(struct trace_probe *tp) |
318 | { |
319 | return &tp->event->probes; |
320 | } |
321 | |
322 | static inline bool trace_probe_has_sibling(struct trace_probe *tp) |
323 | { |
324 | struct list_head *list = trace_probe_probe_list(tp); |
325 | |
326 | return !list_empty(head: list) && !list_is_singular(head: list); |
327 | } |
328 | |
329 | static inline int trace_probe_unregister_event_call(struct trace_probe *tp) |
330 | { |
331 | /* tp->event is unregistered in trace_remove_event_call() */ |
332 | return trace_remove_event_call(call: &tp->event->call); |
333 | } |
334 | |
335 | static inline bool trace_probe_has_single_file(struct trace_probe *tp) |
336 | { |
337 | return !!list_is_singular(head: &tp->event->files); |
338 | } |
339 | |
340 | int trace_probe_init(struct trace_probe *tp, const char *event, |
341 | const char *group, bool alloc_filter); |
342 | void trace_probe_cleanup(struct trace_probe *tp); |
343 | int trace_probe_append(struct trace_probe *tp, struct trace_probe *to); |
344 | void trace_probe_unlink(struct trace_probe *tp); |
345 | int trace_probe_register_event_call(struct trace_probe *tp); |
346 | int trace_probe_add_file(struct trace_probe *tp, struct trace_event_file *file); |
347 | int trace_probe_remove_file(struct trace_probe *tp, |
348 | struct trace_event_file *file); |
349 | struct event_file_link *trace_probe_get_file_link(struct trace_probe *tp, |
350 | struct trace_event_file *file); |
351 | int trace_probe_compare_arg_type(struct trace_probe *a, struct trace_probe *b); |
352 | bool trace_probe_match_command_args(struct trace_probe *tp, |
353 | int argc, const char **argv); |
354 | int trace_probe_create(const char *raw_command, int (*createfn)(int, const char **)); |
355 | int trace_probe_print_args(struct trace_seq *s, struct probe_arg *args, int nr_args, |
356 | u8 *data, void *field); |
357 | |
358 | #define trace_probe_for_each_link(pos, tp) \ |
359 | list_for_each_entry(pos, &(tp)->event->files, list) |
360 | #define trace_probe_for_each_link_rcu(pos, tp) \ |
361 | list_for_each_entry_rcu(pos, &(tp)->event->files, list) |
362 | |
363 | /* |
364 | * The flags used for parsing trace_probe arguments. |
365 | * TPARG_FL_RETURN, TPARG_FL_FENTRY and TPARG_FL_TEVENT are mutually exclusive. |
366 | * TPARG_FL_KERNEL and TPARG_FL_USER are also mutually exclusive. |
367 | * TPARG_FL_FPROBE and TPARG_FL_TPOINT are optional but it should be with |
368 | * TPARG_FL_KERNEL. |
369 | */ |
370 | #define TPARG_FL_RETURN BIT(0) |
371 | #define TPARG_FL_KERNEL BIT(1) |
372 | #define TPARG_FL_FENTRY BIT(2) |
373 | #define TPARG_FL_TEVENT BIT(3) |
374 | #define TPARG_FL_USER BIT(4) |
375 | #define TPARG_FL_FPROBE BIT(5) |
376 | #define TPARG_FL_TPOINT BIT(6) |
377 | #define TPARG_FL_LOC_MASK GENMASK(4, 0) |
378 | |
379 | static inline bool tparg_is_function_entry(unsigned int flags) |
380 | { |
381 | return (flags & TPARG_FL_LOC_MASK) == (TPARG_FL_KERNEL | TPARG_FL_FENTRY); |
382 | } |
383 | |
384 | struct traceprobe_parse_context { |
385 | struct trace_event_call *event; |
386 | /* BTF related parameters */ |
387 | const char *funcname; /* Function name in BTF */ |
388 | const struct btf_type *proto; /* Prototype of the function */ |
389 | const struct btf_param *params; /* Parameter of the function */ |
390 | s32 nr_params; /* The number of the parameters */ |
391 | struct btf *btf; /* The BTF to be used */ |
392 | const struct btf_type *last_type; /* Saved type */ |
393 | u32 last_bitoffs; /* Saved bitoffs */ |
394 | u32 last_bitsize; /* Saved bitsize */ |
395 | unsigned int flags; |
396 | int offset; |
397 | }; |
398 | |
399 | extern int traceprobe_parse_probe_arg(struct trace_probe *tp, int i, |
400 | const char *argv, |
401 | struct traceprobe_parse_context *ctx); |
402 | const char **traceprobe_expand_meta_args(int argc, const char *argv[], |
403 | int *new_argc, char *buf, int bufsize, |
404 | struct traceprobe_parse_context *ctx); |
405 | |
406 | extern int traceprobe_update_arg(struct probe_arg *arg); |
407 | extern void traceprobe_free_probe_arg(struct probe_arg *arg); |
408 | |
409 | /* |
410 | * If either traceprobe_parse_probe_arg() or traceprobe_expand_meta_args() is called, |
411 | * this MUST be called for clean up the context and return a resource. |
412 | */ |
413 | void traceprobe_finish_parse(struct traceprobe_parse_context *ctx); |
414 | |
415 | extern int traceprobe_split_symbol_offset(char *symbol, long *offset); |
416 | int traceprobe_parse_event_name(const char **pevent, const char **pgroup, |
417 | char *buf, int offset); |
418 | |
419 | enum probe_print_type { |
420 | PROBE_PRINT_NORMAL, |
421 | PROBE_PRINT_RETURN, |
422 | PROBE_PRINT_EVENT, |
423 | }; |
424 | |
425 | extern int traceprobe_set_print_fmt(struct trace_probe *tp, enum probe_print_type ptype); |
426 | |
427 | #ifdef CONFIG_PERF_EVENTS |
428 | extern struct trace_event_call * |
429 | create_local_trace_kprobe(char *func, void *addr, unsigned long offs, |
430 | bool is_return); |
431 | extern void destroy_local_trace_kprobe(struct trace_event_call *event_call); |
432 | |
433 | extern struct trace_event_call * |
434 | create_local_trace_uprobe(char *name, unsigned long offs, |
435 | unsigned long ref_ctr_offset, bool is_return); |
436 | extern void destroy_local_trace_uprobe(struct trace_event_call *event_call); |
437 | #endif |
438 | extern int traceprobe_define_arg_fields(struct trace_event_call *event_call, |
439 | size_t offset, struct trace_probe *tp); |
440 | |
441 | #undef ERRORS |
442 | #define ERRORS \ |
443 | C(FILE_NOT_FOUND, "Failed to find the given file"), \ |
444 | C(NO_REGULAR_FILE, "Not a regular file"), \ |
445 | C(BAD_REFCNT, "Invalid reference counter offset"), \ |
446 | C(REFCNT_OPEN_BRACE, "Reference counter brace is not closed"), \ |
447 | C(BAD_REFCNT_SUFFIX, "Reference counter has wrong suffix"), \ |
448 | C(BAD_UPROBE_OFFS, "Invalid uprobe offset"), \ |
449 | C(BAD_MAXACT_TYPE, "Maxactive is only for function exit"), \ |
450 | C(BAD_MAXACT, "Invalid maxactive number"), \ |
451 | C(MAXACT_TOO_BIG, "Maxactive is too big"), \ |
452 | C(BAD_PROBE_ADDR, "Invalid probed address or symbol"), \ |
453 | C(NON_UNIQ_SYMBOL, "The symbol is not unique"), \ |
454 | C(BAD_RETPROBE, "Retprobe address must be an function entry"), \ |
455 | C(NO_TRACEPOINT, "Tracepoint is not found"), \ |
456 | C(BAD_ADDR_SUFFIX, "Invalid probed address suffix"), \ |
457 | C(NO_GROUP_NAME, "Group name is not specified"), \ |
458 | C(GROUP_TOO_LONG, "Group name is too long"), \ |
459 | C(BAD_GROUP_NAME, "Group name must follow the same rules as C identifiers"), \ |
460 | C(NO_EVENT_NAME, "Event name is not specified"), \ |
461 | C(EVENT_TOO_LONG, "Event name is too long"), \ |
462 | C(BAD_EVENT_NAME, "Event name must follow the same rules as C identifiers"), \ |
463 | C(EVENT_EXIST, "Given group/event name is already used by another event"), \ |
464 | C(RETVAL_ON_PROBE, "$retval is not available on probe"), \ |
465 | C(NO_RETVAL, "This function returns 'void' type"), \ |
466 | C(BAD_STACK_NUM, "Invalid stack number"), \ |
467 | C(BAD_ARG_NUM, "Invalid argument number"), \ |
468 | C(BAD_VAR, "Invalid $-valiable specified"), \ |
469 | C(BAD_REG_NAME, "Invalid register name"), \ |
470 | C(BAD_MEM_ADDR, "Invalid memory address"), \ |
471 | C(BAD_IMM, "Invalid immediate value"), \ |
472 | C(IMMSTR_NO_CLOSE, "String is not closed with '\"'"), \ |
473 | C(FILE_ON_KPROBE, "File offset is not available with kprobe"), \ |
474 | C(BAD_FILE_OFFS, "Invalid file offset value"), \ |
475 | C(SYM_ON_UPROBE, "Symbol is not available with uprobe"), \ |
476 | C(TOO_MANY_OPS, "Dereference is too much nested"), \ |
477 | C(DEREF_NEED_BRACE, "Dereference needs a brace"), \ |
478 | C(BAD_DEREF_OFFS, "Invalid dereference offset"), \ |
479 | C(DEREF_OPEN_BRACE, "Dereference brace is not closed"), \ |
480 | C(COMM_CANT_DEREF, "$comm can not be dereferenced"), \ |
481 | C(BAD_FETCH_ARG, "Invalid fetch argument"), \ |
482 | C(ARRAY_NO_CLOSE, "Array is not closed"), \ |
483 | C(BAD_ARRAY_SUFFIX, "Array has wrong suffix"), \ |
484 | C(BAD_ARRAY_NUM, "Invalid array size"), \ |
485 | C(ARRAY_TOO_BIG, "Array number is too big"), \ |
486 | C(BAD_TYPE, "Unknown type is specified"), \ |
487 | C(BAD_STRING, "String accepts only memory argument"), \ |
488 | C(BAD_SYMSTRING, "Symbol String doesn't accept data/userdata"), \ |
489 | C(BAD_BITFIELD, "Invalid bitfield"), \ |
490 | C(ARG_NAME_TOO_LONG, "Argument name is too long"), \ |
491 | C(NO_ARG_NAME, "Argument name is not specified"), \ |
492 | C(BAD_ARG_NAME, "Argument name must follow the same rules as C identifiers"), \ |
493 | C(USED_ARG_NAME, "This argument name is already used"), \ |
494 | C(ARG_TOO_LONG, "Argument expression is too long"), \ |
495 | C(NO_ARG_BODY, "No argument expression"), \ |
496 | C(BAD_INSN_BNDRY, "Probe point is not an instruction boundary"),\ |
497 | C(FAIL_REG_PROBE, "Failed to register probe event"),\ |
498 | C(DIFF_PROBE_TYPE, "Probe type is different from existing probe"),\ |
499 | C(DIFF_ARG_TYPE, "Argument type or name is different from existing probe"),\ |
500 | C(SAME_PROBE, "There is already the exact same probe event"),\ |
501 | C(NO_EVENT_INFO, "This requires both group and event name to attach"),\ |
502 | C(BAD_ATTACH_EVENT, "Attached event does not exist"),\ |
503 | C(BAD_ATTACH_ARG, "Attached event does not have this field"),\ |
504 | C(NO_EP_FILTER, "No filter rule after 'if'"), \ |
505 | C(NOSUP_BTFARG, "BTF is not available or not supported"), \ |
506 | C(NO_BTFARG, "This variable is not found at this probe point"),\ |
507 | C(NO_BTF_ENTRY, "No BTF entry for this probe point"), \ |
508 | C(BAD_VAR_ARGS, "$arg* must be an independent parameter without name etc."),\ |
509 | C(NOFENTRY_ARGS, "$arg* can be used only on function entry"), \ |
510 | C(DOUBLE_ARGS, "$arg* can be used only once in the parameters"), \ |
511 | C(ARGS_2LONG, "$arg* failed because the argument list is too long"), \ |
512 | C(ARGIDX_2BIG, "$argN index is too big"), \ |
513 | C(NO_PTR_STRCT, "This is not a pointer to union/structure."), \ |
514 | C(NOSUP_DAT_ARG, "Non pointer structure/union argument is not supported."),\ |
515 | C(BAD_HYPHEN, "Failed to parse single hyphen. Forgot '>'?"), \ |
516 | C(NO_BTF_FIELD, "This field is not found."), \ |
517 | C(BAD_BTF_TID, "Failed to get BTF type info."),\ |
518 | C(BAD_TYPE4STR, "This type does not fit for string."), |
519 | |
520 | #undef C |
521 | #define C(a, b) TP_ERR_##a |
522 | |
523 | /* Define TP_ERR_ */ |
524 | enum { ERRORS }; |
525 | |
526 | /* Error text is defined in trace_probe.c */ |
527 | |
528 | struct trace_probe_log { |
529 | const char *subsystem; |
530 | const char **argv; |
531 | int argc; |
532 | int index; |
533 | }; |
534 | |
535 | void trace_probe_log_init(const char *subsystem, int argc, const char **argv); |
536 | void trace_probe_log_set_index(int index); |
537 | void trace_probe_log_clear(void); |
538 | void __trace_probe_log_err(int offset, int err); |
539 | |
540 | #define trace_probe_log_err(offs, err) \ |
541 | __trace_probe_log_err(offs, TP_ERR_##err) |
542 | |
543 | struct uprobe_dispatch_data { |
544 | struct trace_uprobe *tu; |
545 | unsigned long bp_addr; |
546 | }; |
547 | |