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Commit 4e58e54754dc1fec21c3a9e824bc108b05fdf46e

Authored by Steven Rostedt (Red Hat)
Committed by Steven Rostedt
1 parent 6ce4eac1f6
Exists in smarc-imx_3.14.28_1.0.0_ga and in 1 other branch imx_3.14.28_1.0.0_ga

tracing: Allow events to have NULL strings 

If an TRACE_EVENT() uses __assign_str() or __get_str on a NULL pointer
then the following oops will happen:

BUG: unable to handle kernel NULL pointer dereference at   (null)
IP: [<c127a17b>] strlen+0x10/0x1a
*pde = 00000000 ^M
Oops: 0000 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 3.13.0-rc1-test+ #2
Hardware name:                  /DG965MQ, BIOS MQ96510J.86A.0372.2006.0605.1717 06/05/2006^M
task: f5cde9f0 ti: f5e5e000 task.ti: f5e5e000
EIP: 0060:[<c127a17b>] EFLAGS: 00210046 CPU: 1
EIP is at strlen+0x10/0x1a
EAX: 00000000 EBX: c2472da8 ECX: ffffffff EDX: c2472da8
ESI: c1c5e5fc EDI: 00000000 EBP: f5e5fe84 ESP: f5e5fe80
 DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
CR0: 8005003b CR2: 00000000 CR3: 01f32000 CR4: 000007d0
Stack:
 f5f18b90 f5e5feb8 c10687a8 0759004f 00000005 00000005 00000005 00200046
 00000002 00000000 c1082a93 f56c7e28 c2472da8 c1082a93 f5e5fee4 c106bc61^M
 00000000 c1082a93 00000000 00000000 00000001 00200046 00200082 00000000
Call Trace:
 [<c10687a8>] ftrace_raw_event_lock+0x39/0xc0
 [<c1082a93>] ? ktime_get+0x29/0x69
 [<c1082a93>] ? ktime_get+0x29/0x69
 [<c106bc61>] lock_release+0x57/0x1a5
 [<c1082a93>] ? ktime_get+0x29/0x69
 [<c10824dd>] read_seqcount_begin.constprop.7+0x4d/0x75
 [<c1082a93>] ? ktime_get+0x29/0x69^M
 [<c1082a93>] ktime_get+0x29/0x69
 [<c108a46a>] __tick_nohz_idle_enter+0x1e/0x426
 [<c10690e8>] ? lock_release_holdtime.part.19+0x48/0x4d
 [<c10bc184>] ? time_hardirqs_off+0xe/0x28
 [<c1068c82>] ? trace_hardirqs_off_caller+0x3f/0xaf
 [<c108a8cb>] tick_nohz_idle_enter+0x59/0x62
 [<c1079242>] cpu_startup_entry+0x64/0x192
 [<c102299c>] start_secondary+0x277/0x27c
Code: 90 89 c6 89 d0 88 c4 ac 38 e0 74 09 84 c0 75 f7 be 01 00 00 00 89 f0 48 5e 5d c3 55 89 e5 57 66 66 66 66 90 83 c9 ff 89 c7 31 c0 <f2> ae f7 d1 8d 41 ff 5f 5d c3 55 89 e5 57 66 66 66 66 90 31 ff
EIP: [<c127a17b>] strlen+0x10/0x1a SS:ESP 0068:f5e5fe80
CR2: 0000000000000000
---[ end trace 01bc47bf519ec1b2 ]---

New tracepoints have been added that have allowed for NULL pointers
being assigned to strings. To fix this, change the TRACE_EVENT() code
to check for NULL and if it is, it will assign "(null)" to it instead
(similar to what glibc printf does).

Reported-by: Shuah Khan <shuah.kh@samsung.com>
Reported-by: Jovi Zhangwei <jovi.zhangwei@gmail.com>
Link: http://lkml.kernel.org/r/CAGdX0WFeEuy+DtpsJzyzn0343qEEjLX97+o1VREFkUEhndC+5Q@mail.gmail.com
Link: http://lkml.kernel.org/r/528D6972.9010702@samsung.com
Fixes: 9cbf117662e2 ("tracing/events: provide string with undefined size support")
Cc: stable@vger.kernel.org # 2.6.31+
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

Showing 1 changed file with 3 additions and 2 deletions Inline Diff

include/trace/ftrace.h
Diff comments   View file @ 4e58e54
1 /* 1 /*
2 * Stage 1 of the trace events. 2 * Stage 1 of the trace events.
3 * 3 *
4 * Override the macros in <trace/trace_events.h> to include the following: 4 * Override the macros in <trace/trace_events.h> to include the following:
5 * 5 *
6 * struct ftrace_raw_<call> { 6 * struct ftrace_raw_<call> {
7 * struct trace_entry ent; 7 * struct trace_entry ent;
8 * <type> <item>; 8 * <type> <item>;
9 * <type2> <item2>[<len>]; 9 * <type2> <item2>[<len>];
10 * [...] 10 * [...]
11 * }; 11 * };
12 * 12 *
13 * The <type> <item> is created by the __field(type, item) macro or 13 * The <type> <item> is created by the __field(type, item) macro or
14 * the __array(type2, item2, len) macro. 14 * the __array(type2, item2, len) macro.
15 * We simply do "type item;", and that will create the fields 15 * We simply do "type item;", and that will create the fields
16 * in the structure. 16 * in the structure.
17 */ 17 */
18 18
19 #include <linux/ftrace_event.h> 19 #include <linux/ftrace_event.h>
20 20
21 /* 21 /*
22 * DECLARE_EVENT_CLASS can be used to add a generic function 22 * DECLARE_EVENT_CLASS can be used to add a generic function
23 * handlers for events. That is, if all events have the same 23 * handlers for events. That is, if all events have the same
24 * parameters and just have distinct trace points. 24 * parameters and just have distinct trace points.
25 * Each tracepoint can be defined with DEFINE_EVENT and that 25 * Each tracepoint can be defined with DEFINE_EVENT and that
26 * will map the DECLARE_EVENT_CLASS to the tracepoint. 26 * will map the DECLARE_EVENT_CLASS to the tracepoint.
27 * 27 *
28 * TRACE_EVENT is a one to one mapping between tracepoint and template. 28 * TRACE_EVENT is a one to one mapping between tracepoint and template.
29 */ 29 */
30 #undef TRACE_EVENT 30 #undef TRACE_EVENT
31 #define TRACE_EVENT(name, proto, args, tstruct, assign, print) \ 31 #define TRACE_EVENT(name, proto, args, tstruct, assign, print) \
32 DECLARE_EVENT_CLASS(name, \ 32 DECLARE_EVENT_CLASS(name, \
33 PARAMS(proto), \ 33 PARAMS(proto), \
34 PARAMS(args), \ 34 PARAMS(args), \
35 PARAMS(tstruct), \ 35 PARAMS(tstruct), \
36 PARAMS(assign), \ 36 PARAMS(assign), \
37 PARAMS(print)); \ 37 PARAMS(print)); \
38 DEFINE_EVENT(name, name, PARAMS(proto), PARAMS(args)); 38 DEFINE_EVENT(name, name, PARAMS(proto), PARAMS(args));
39 39
40 40
41 #undef __field 41 #undef __field
42 #define __field(type, item) type item; 42 #define __field(type, item) type item;
43 43
44 #undef __field_ext 44 #undef __field_ext
45 #define __field_ext(type, item, filter_type) type item; 45 #define __field_ext(type, item, filter_type) type item;
46 46
47 #undef __array 47 #undef __array
48 #define __array(type, item, len) type item[len]; 48 #define __array(type, item, len) type item[len];
49 49
50 #undef __dynamic_array 50 #undef __dynamic_array
51 #define __dynamic_array(type, item, len) u32 __data_loc_##item; 51 #define __dynamic_array(type, item, len) u32 __data_loc_##item;
52 52
53 #undef __string 53 #undef __string
54 #define __string(item, src) __dynamic_array(char, item, -1) 54 #define __string(item, src) __dynamic_array(char, item, -1)
55 55
56 #undef TP_STRUCT__entry 56 #undef TP_STRUCT__entry
57 #define TP_STRUCT__entry(args...) args 57 #define TP_STRUCT__entry(args...) args
58 58
59 #undef DECLARE_EVENT_CLASS 59 #undef DECLARE_EVENT_CLASS
60 #define DECLARE_EVENT_CLASS(name, proto, args, tstruct, assign, print) \ 60 #define DECLARE_EVENT_CLASS(name, proto, args, tstruct, assign, print) \
61 struct ftrace_raw_##name { \ 61 struct ftrace_raw_##name { \
62 struct trace_entry ent; \ 62 struct trace_entry ent; \
63 tstruct \ 63 tstruct \
64 char __data[0]; \ 64 char __data[0]; \
65 }; \ 65 }; \
66 \ 66 \
67 static struct ftrace_event_class event_class_##name; 67 static struct ftrace_event_class event_class_##name;
68 68
69 #undef DEFINE_EVENT 69 #undef DEFINE_EVENT
70 #define DEFINE_EVENT(template, name, proto, args) \ 70 #define DEFINE_EVENT(template, name, proto, args) \
71 static struct ftrace_event_call __used \ 71 static struct ftrace_event_call __used \
72 __attribute__((__aligned__(4))) event_##name 72 __attribute__((__aligned__(4))) event_##name
73 73
74 #undef DEFINE_EVENT_FN 74 #undef DEFINE_EVENT_FN
75 #define DEFINE_EVENT_FN(template, name, proto, args, reg, unreg) \ 75 #define DEFINE_EVENT_FN(template, name, proto, args, reg, unreg) \
76 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) 76 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
77 77
78 #undef DEFINE_EVENT_PRINT 78 #undef DEFINE_EVENT_PRINT
79 #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ 79 #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
80 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) 80 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
81 81
82 /* Callbacks are meaningless to ftrace. */ 82 /* Callbacks are meaningless to ftrace. */
83 #undef TRACE_EVENT_FN 83 #undef TRACE_EVENT_FN
84 #define TRACE_EVENT_FN(name, proto, args, tstruct, \ 84 #define TRACE_EVENT_FN(name, proto, args, tstruct, \
85 assign, print, reg, unreg) \ 85 assign, print, reg, unreg) \
86 TRACE_EVENT(name, PARAMS(proto), PARAMS(args), \ 86 TRACE_EVENT(name, PARAMS(proto), PARAMS(args), \
87 PARAMS(tstruct), PARAMS(assign), PARAMS(print)) \ 87 PARAMS(tstruct), PARAMS(assign), PARAMS(print)) \
88 88
89 #undef TRACE_EVENT_FLAGS 89 #undef TRACE_EVENT_FLAGS
90 #define TRACE_EVENT_FLAGS(name, value) \ 90 #define TRACE_EVENT_FLAGS(name, value) \
91 __TRACE_EVENT_FLAGS(name, value) 91 __TRACE_EVENT_FLAGS(name, value)
92 92
93 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) 93 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
94 94
95 95
96 /* 96 /*
97 * Stage 2 of the trace events. 97 * Stage 2 of the trace events.
98 * 98 *
99 * Include the following: 99 * Include the following:
100 * 100 *
101 * struct ftrace_data_offsets_<call> { 101 * struct ftrace_data_offsets_<call> {
102 * u32 <item1>; 102 * u32 <item1>;
103 * u32 <item2>; 103 * u32 <item2>;
104 * [...] 104 * [...]
105 * }; 105 * };
106 * 106 *
107 * The __dynamic_array() macro will create each u32 <item>, this is 107 * The __dynamic_array() macro will create each u32 <item>, this is
108 * to keep the offset of each array from the beginning of the event. 108 * to keep the offset of each array from the beginning of the event.
109 * The size of an array is also encoded, in the higher 16 bits of <item>. 109 * The size of an array is also encoded, in the higher 16 bits of <item>.
110 */ 110 */
111 111
112 #undef __field 112 #undef __field
113 #define __field(type, item) 113 #define __field(type, item)
114 114
115 #undef __field_ext 115 #undef __field_ext
116 #define __field_ext(type, item, filter_type) 116 #define __field_ext(type, item, filter_type)
117 117
118 #undef __array 118 #undef __array
119 #define __array(type, item, len) 119 #define __array(type, item, len)
120 120
121 #undef __dynamic_array 121 #undef __dynamic_array
122 #define __dynamic_array(type, item, len) u32 item; 122 #define __dynamic_array(type, item, len) u32 item;
123 123
124 #undef __string 124 #undef __string
125 #define __string(item, src) __dynamic_array(char, item, -1) 125 #define __string(item, src) __dynamic_array(char, item, -1)
126 126
127 #undef DECLARE_EVENT_CLASS 127 #undef DECLARE_EVENT_CLASS
128 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ 128 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
129 struct ftrace_data_offsets_##call { \ 129 struct ftrace_data_offsets_##call { \
130 tstruct; \ 130 tstruct; \
131 }; 131 };
132 132
133 #undef DEFINE_EVENT 133 #undef DEFINE_EVENT
134 #define DEFINE_EVENT(template, name, proto, args) 134 #define DEFINE_EVENT(template, name, proto, args)
135 135
136 #undef DEFINE_EVENT_PRINT 136 #undef DEFINE_EVENT_PRINT
137 #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ 137 #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
138 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) 138 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
139 139
140 #undef TRACE_EVENT_FLAGS 140 #undef TRACE_EVENT_FLAGS
141 #define TRACE_EVENT_FLAGS(event, flag) 141 #define TRACE_EVENT_FLAGS(event, flag)
142 142
143 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) 143 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
144 144
145 /* 145 /*
146 * Stage 3 of the trace events. 146 * Stage 3 of the trace events.
147 * 147 *
148 * Override the macros in <trace/trace_events.h> to include the following: 148 * Override the macros in <trace/trace_events.h> to include the following:
149 * 149 *
150 * enum print_line_t 150 * enum print_line_t
151 * ftrace_raw_output_<call>(struct trace_iterator *iter, int flags) 151 * ftrace_raw_output_<call>(struct trace_iterator *iter, int flags)
152 * { 152 * {
153 * struct trace_seq *s = &iter->seq; 153 * struct trace_seq *s = &iter->seq;
154 * struct ftrace_raw_<call> *field; <-- defined in stage 1 154 * struct ftrace_raw_<call> *field; <-- defined in stage 1
155 * struct trace_entry *entry; 155 * struct trace_entry *entry;
156 * struct trace_seq *p = &iter->tmp_seq; 156 * struct trace_seq *p = &iter->tmp_seq;
157 * int ret; 157 * int ret;
158 * 158 *
159 * entry = iter->ent; 159 * entry = iter->ent;
160 * 160 *
161 * if (entry->type != event_<call>->event.type) { 161 * if (entry->type != event_<call>->event.type) {
162 * WARN_ON_ONCE(1); 162 * WARN_ON_ONCE(1);
163 * return TRACE_TYPE_UNHANDLED; 163 * return TRACE_TYPE_UNHANDLED;
164 * } 164 * }
165 * 165 *
166 * field = (typeof(field))entry; 166 * field = (typeof(field))entry;
167 * 167 *
168 * trace_seq_init(p); 168 * trace_seq_init(p);
169 * ret = trace_seq_printf(s, "%s: ", <call>); 169 * ret = trace_seq_printf(s, "%s: ", <call>);
170 * if (ret) 170 * if (ret)
171 * ret = trace_seq_printf(s, <TP_printk> "\n"); 171 * ret = trace_seq_printf(s, <TP_printk> "\n");
172 * if (!ret) 172 * if (!ret)
173 * return TRACE_TYPE_PARTIAL_LINE; 173 * return TRACE_TYPE_PARTIAL_LINE;
174 * 174 *
175 * return TRACE_TYPE_HANDLED; 175 * return TRACE_TYPE_HANDLED;
176 * } 176 * }
177 * 177 *
178 * This is the method used to print the raw event to the trace 178 * This is the method used to print the raw event to the trace
179 * output format. Note, this is not needed if the data is read 179 * output format. Note, this is not needed if the data is read
180 * in binary. 180 * in binary.
181 */ 181 */
182 182
183 #undef __entry 183 #undef __entry
184 #define __entry field 184 #define __entry field
185 185
186 #undef TP_printk 186 #undef TP_printk
187 #define TP_printk(fmt, args...) fmt "\n", args 187 #define TP_printk(fmt, args...) fmt "\n", args
188 188
189 #undef __get_dynamic_array 189 #undef __get_dynamic_array
190 #define __get_dynamic_array(field) \ 190 #define __get_dynamic_array(field) \
191 ((void *)__entry + (__entry->__data_loc_##field & 0xffff)) 191 ((void *)__entry + (__entry->__data_loc_##field & 0xffff))
192 192
193 #undef __get_str 193 #undef __get_str
194 #define __get_str(field) (char *)__get_dynamic_array(field) 194 #define __get_str(field) (char *)__get_dynamic_array(field)
195 195
196 #undef __print_flags 196 #undef __print_flags
197 #define __print_flags(flag, delim, flag_array...) \ 197 #define __print_flags(flag, delim, flag_array...) \
198 ({ \ 198 ({ \
199 static const struct trace_print_flags __flags[] = \ 199 static const struct trace_print_flags __flags[] = \
200 { flag_array, { -1, NULL }}; \ 200 { flag_array, { -1, NULL }}; \
201 ftrace_print_flags_seq(p, delim, flag, __flags); \ 201 ftrace_print_flags_seq(p, delim, flag, __flags); \
202 }) 202 })
203 203
204 #undef __print_symbolic 204 #undef __print_symbolic
205 #define __print_symbolic(value, symbol_array...) \ 205 #define __print_symbolic(value, symbol_array...) \
206 ({ \ 206 ({ \
207 static const struct trace_print_flags symbols[] = \ 207 static const struct trace_print_flags symbols[] = \
208 { symbol_array, { -1, NULL }}; \ 208 { symbol_array, { -1, NULL }}; \
209 ftrace_print_symbols_seq(p, value, symbols); \ 209 ftrace_print_symbols_seq(p, value, symbols); \
210 }) 210 })
211 211
212 #undef __print_symbolic_u64 212 #undef __print_symbolic_u64
213 #if BITS_PER_LONG == 32 213 #if BITS_PER_LONG == 32
214 #define __print_symbolic_u64(value, symbol_array...) \ 214 #define __print_symbolic_u64(value, symbol_array...) \
215 ({ \ 215 ({ \
216 static const struct trace_print_flags_u64 symbols[] = \ 216 static const struct trace_print_flags_u64 symbols[] = \
217 { symbol_array, { -1, NULL } }; \ 217 { symbol_array, { -1, NULL } }; \
218 ftrace_print_symbols_seq_u64(p, value, symbols); \ 218 ftrace_print_symbols_seq_u64(p, value, symbols); \
219 }) 219 })
220 #else 220 #else
221 #define __print_symbolic_u64(value, symbol_array...) \ 221 #define __print_symbolic_u64(value, symbol_array...) \
222 __print_symbolic(value, symbol_array) 222 __print_symbolic(value, symbol_array)
223 #endif 223 #endif
224 224
225 #undef __print_hex 225 #undef __print_hex
226 #define __print_hex(buf, buf_len) ftrace_print_hex_seq(p, buf, buf_len) 226 #define __print_hex(buf, buf_len) ftrace_print_hex_seq(p, buf, buf_len)
227 227
228 #undef DECLARE_EVENT_CLASS 228 #undef DECLARE_EVENT_CLASS
229 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ 229 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
230 static notrace enum print_line_t \ 230 static notrace enum print_line_t \
231 ftrace_raw_output_##call(struct trace_iterator *iter, int flags, \ 231 ftrace_raw_output_##call(struct trace_iterator *iter, int flags, \
232 struct trace_event *trace_event) \ 232 struct trace_event *trace_event) \
233 { \ 233 { \
234 struct trace_seq *s = &iter->seq; \ 234 struct trace_seq *s = &iter->seq; \
235 struct trace_seq __maybe_unused *p = &iter->tmp_seq; \ 235 struct trace_seq __maybe_unused *p = &iter->tmp_seq; \
236 struct ftrace_raw_##call *field; \ 236 struct ftrace_raw_##call *field; \
237 int ret; \ 237 int ret; \
238 \ 238 \
239 field = (typeof(field))iter->ent; \ 239 field = (typeof(field))iter->ent; \
240 \ 240 \
241 ret = ftrace_raw_output_prep(iter, trace_event); \ 241 ret = ftrace_raw_output_prep(iter, trace_event); \
242 if (ret) \ 242 if (ret) \
243 return ret; \ 243 return ret; \
244 \ 244 \
245 ret = trace_seq_printf(s, print); \ 245 ret = trace_seq_printf(s, print); \
246 if (!ret) \ 246 if (!ret) \
247 return TRACE_TYPE_PARTIAL_LINE; \ 247 return TRACE_TYPE_PARTIAL_LINE; \
248 \ 248 \
249 return TRACE_TYPE_HANDLED; \ 249 return TRACE_TYPE_HANDLED; \
250 } \ 250 } \
251 static struct trace_event_functions ftrace_event_type_funcs_##call = { \ 251 static struct trace_event_functions ftrace_event_type_funcs_##call = { \
252 .trace = ftrace_raw_output_##call, \ 252 .trace = ftrace_raw_output_##call, \
253 }; 253 };
254 254
255 #undef DEFINE_EVENT_PRINT 255 #undef DEFINE_EVENT_PRINT
256 #define DEFINE_EVENT_PRINT(template, call, proto, args, print) \ 256 #define DEFINE_EVENT_PRINT(template, call, proto, args, print) \
257 static notrace enum print_line_t \ 257 static notrace enum print_line_t \
258 ftrace_raw_output_##call(struct trace_iterator *iter, int flags, \ 258 ftrace_raw_output_##call(struct trace_iterator *iter, int flags, \
259 struct trace_event *event) \ 259 struct trace_event *event) \
260 { \ 260 { \
261 struct trace_seq *s = &iter->seq; \ 261 struct trace_seq *s = &iter->seq; \
262 struct ftrace_raw_##template *field; \ 262 struct ftrace_raw_##template *field; \
263 struct trace_entry *entry; \ 263 struct trace_entry *entry; \
264 struct trace_seq *p = &iter->tmp_seq; \ 264 struct trace_seq *p = &iter->tmp_seq; \
265 int ret; \ 265 int ret; \
266 \ 266 \
267 entry = iter->ent; \ 267 entry = iter->ent; \
268 \ 268 \
269 if (entry->type != event_##call.event.type) { \ 269 if (entry->type != event_##call.event.type) { \
270 WARN_ON_ONCE(1); \ 270 WARN_ON_ONCE(1); \
271 return TRACE_TYPE_UNHANDLED; \ 271 return TRACE_TYPE_UNHANDLED; \
272 } \ 272 } \
273 \ 273 \
274 field = (typeof(field))entry; \ 274 field = (typeof(field))entry; \
275 \ 275 \
276 trace_seq_init(p); \ 276 trace_seq_init(p); \
277 ret = trace_seq_printf(s, "%s: ", #call); \ 277 ret = trace_seq_printf(s, "%s: ", #call); \
278 if (ret) \ 278 if (ret) \
279 ret = trace_seq_printf(s, print); \ 279 ret = trace_seq_printf(s, print); \
280 if (!ret) \ 280 if (!ret) \
281 return TRACE_TYPE_PARTIAL_LINE; \ 281 return TRACE_TYPE_PARTIAL_LINE; \
282 \ 282 \
283 return TRACE_TYPE_HANDLED; \ 283 return TRACE_TYPE_HANDLED; \
284 } \ 284 } \
285 static struct trace_event_functions ftrace_event_type_funcs_##call = { \ 285 static struct trace_event_functions ftrace_event_type_funcs_##call = { \
286 .trace = ftrace_raw_output_##call, \ 286 .trace = ftrace_raw_output_##call, \
287 }; 287 };
288 288
289 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) 289 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
290 290
291 #undef __field_ext 291 #undef __field_ext
292 #define __field_ext(type, item, filter_type) \ 292 #define __field_ext(type, item, filter_type) \
293 ret = trace_define_field(event_call, #type, #item, \ 293 ret = trace_define_field(event_call, #type, #item, \
294 offsetof(typeof(field), item), \ 294 offsetof(typeof(field), item), \
295 sizeof(field.item), \ 295 sizeof(field.item), \
296 is_signed_type(type), filter_type); \ 296 is_signed_type(type), filter_type); \
297 if (ret) \ 297 if (ret) \
298 return ret; 298 return ret;
299 299
300 #undef __field 300 #undef __field
301 #define __field(type, item) __field_ext(type, item, FILTER_OTHER) 301 #define __field(type, item) __field_ext(type, item, FILTER_OTHER)
302 302
303 #undef __array 303 #undef __array
304 #define __array(type, item, len) \ 304 #define __array(type, item, len) \
305 do { \ 305 do { \
306 mutex_lock(&event_storage_mutex); \ 306 mutex_lock(&event_storage_mutex); \
307 BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \ 307 BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \
308 snprintf(event_storage, sizeof(event_storage), \ 308 snprintf(event_storage, sizeof(event_storage), \
309 "%s[%d]", #type, len); \ 309 "%s[%d]", #type, len); \
310 ret = trace_define_field(event_call, event_storage, #item, \ 310 ret = trace_define_field(event_call, event_storage, #item, \
311 offsetof(typeof(field), item), \ 311 offsetof(typeof(field), item), \
312 sizeof(field.item), \ 312 sizeof(field.item), \
313 is_signed_type(type), FILTER_OTHER); \ 313 is_signed_type(type), FILTER_OTHER); \
314 mutex_unlock(&event_storage_mutex); \ 314 mutex_unlock(&event_storage_mutex); \
315 if (ret) \ 315 if (ret) \
316 return ret; \ 316 return ret; \
317 } while (0); 317 } while (0);
318 318
319 #undef __dynamic_array 319 #undef __dynamic_array
320 #define __dynamic_array(type, item, len) \ 320 #define __dynamic_array(type, item, len) \
321 ret = trace_define_field(event_call, "__data_loc " #type "[]", #item, \ 321 ret = trace_define_field(event_call, "__data_loc " #type "[]", #item, \
322 offsetof(typeof(field), __data_loc_##item), \ 322 offsetof(typeof(field), __data_loc_##item), \
323 sizeof(field.__data_loc_##item), \ 323 sizeof(field.__data_loc_##item), \
324 is_signed_type(type), FILTER_OTHER); 324 is_signed_type(type), FILTER_OTHER);
325 325
326 #undef __string 326 #undef __string
327 #define __string(item, src) __dynamic_array(char, item, -1) 327 #define __string(item, src) __dynamic_array(char, item, -1)
328 328
329 #undef DECLARE_EVENT_CLASS 329 #undef DECLARE_EVENT_CLASS
330 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, func, print) \ 330 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, func, print) \
331 static int notrace __init \ 331 static int notrace __init \
332 ftrace_define_fields_##call(struct ftrace_event_call *event_call) \ 332 ftrace_define_fields_##call(struct ftrace_event_call *event_call) \
333 { \ 333 { \
334 struct ftrace_raw_##call field; \ 334 struct ftrace_raw_##call field; \
335 int ret; \ 335 int ret; \
336 \ 336 \
337 tstruct; \ 337 tstruct; \
338 \ 338 \
339 return ret; \ 339 return ret; \
340 } 340 }
341 341
342 #undef DEFINE_EVENT 342 #undef DEFINE_EVENT
343 #define DEFINE_EVENT(template, name, proto, args) 343 #define DEFINE_EVENT(template, name, proto, args)
344 344
345 #undef DEFINE_EVENT_PRINT 345 #undef DEFINE_EVENT_PRINT
346 #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ 346 #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
347 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) 347 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
348 348
349 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) 349 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
350 350
351 /* 351 /*
352 * remember the offset of each array from the beginning of the event. 352 * remember the offset of each array from the beginning of the event.
353 */ 353 */
354 354
355 #undef __entry 355 #undef __entry
356 #define __entry entry 356 #define __entry entry
357 357
358 #undef __field 358 #undef __field
359 #define __field(type, item) 359 #define __field(type, item)
360 360
361 #undef __field_ext 361 #undef __field_ext
362 #define __field_ext(type, item, filter_type) 362 #define __field_ext(type, item, filter_type)
363 363
364 #undef __array 364 #undef __array
365 #define __array(type, item, len) 365 #define __array(type, item, len)
366 366
367 #undef __dynamic_array 367 #undef __dynamic_array
368 #define __dynamic_array(type, item, len) \ 368 #define __dynamic_array(type, item, len) \
369 __data_offsets->item = __data_size + \ 369 __data_offsets->item = __data_size + \
370 offsetof(typeof(*entry), __data); \ 370 offsetof(typeof(*entry), __data); \
371 __data_offsets->item |= (len * sizeof(type)) << 16; \ 371 __data_offsets->item |= (len * sizeof(type)) << 16; \
372 __data_size += (len) * sizeof(type); 372 __data_size += (len) * sizeof(type);
373 373
374 #undef __string 374 #undef __string
375 #define __string(item, src) __dynamic_array(char, item, strlen(src) + 1) 375 #define __string(item, src) __dynamic_array(char, item, \
376 strlen((src) ? (const char *)(src) : "(null)") + 1)
376 377
377 #undef DECLARE_EVENT_CLASS 378 #undef DECLARE_EVENT_CLASS
378 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ 379 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
379 static inline notrace int ftrace_get_offsets_##call( \ 380 static inline notrace int ftrace_get_offsets_##call( \
380 struct ftrace_data_offsets_##call *__data_offsets, proto) \ 381 struct ftrace_data_offsets_##call *__data_offsets, proto) \
381 { \ 382 { \
382 int __data_size = 0; \ 383 int __data_size = 0; \
383 struct ftrace_raw_##call __maybe_unused *entry; \ 384 struct ftrace_raw_##call __maybe_unused *entry; \
384 \ 385 \
385 tstruct; \ 386 tstruct; \
386 \ 387 \
387 return __data_size; \ 388 return __data_size; \
388 } 389 }
389 390
390 #undef DEFINE_EVENT 391 #undef DEFINE_EVENT
391 #define DEFINE_EVENT(template, name, proto, args) 392 #define DEFINE_EVENT(template, name, proto, args)
392 393
393 #undef DEFINE_EVENT_PRINT 394 #undef DEFINE_EVENT_PRINT
394 #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ 395 #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
395 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) 396 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
396 397
397 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) 398 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
398 399
399 /* 400 /*
400 * Stage 4 of the trace events. 401 * Stage 4 of the trace events.
401 * 402 *
402 * Override the macros in <trace/trace_events.h> to include the following: 403 * Override the macros in <trace/trace_events.h> to include the following:
403 * 404 *
404 * For those macros defined with TRACE_EVENT: 405 * For those macros defined with TRACE_EVENT:
405 * 406 *
406 * static struct ftrace_event_call event_<call>; 407 * static struct ftrace_event_call event_<call>;
407 * 408 *
408 * static void ftrace_raw_event_<call>(void *__data, proto) 409 * static void ftrace_raw_event_<call>(void *__data, proto)
409 * { 410 * {
410 * struct ftrace_event_file *ftrace_file = __data; 411 * struct ftrace_event_file *ftrace_file = __data;
411 * struct ftrace_event_call *event_call = ftrace_file->event_call; 412 * struct ftrace_event_call *event_call = ftrace_file->event_call;
412 * struct ftrace_data_offsets_<call> __maybe_unused __data_offsets; 413 * struct ftrace_data_offsets_<call> __maybe_unused __data_offsets;
413 * struct ring_buffer_event *event; 414 * struct ring_buffer_event *event;
414 * struct ftrace_raw_<call> *entry; <-- defined in stage 1 415 * struct ftrace_raw_<call> *entry; <-- defined in stage 1
415 * struct ring_buffer *buffer; 416 * struct ring_buffer *buffer;
416 * unsigned long irq_flags; 417 * unsigned long irq_flags;
417 * int __data_size; 418 * int __data_size;
418 * int pc; 419 * int pc;
419 * 420 *
420 * if (test_bit(FTRACE_EVENT_FL_SOFT_DISABLED_BIT, 421 * if (test_bit(FTRACE_EVENT_FL_SOFT_DISABLED_BIT,
421 * &ftrace_file->flags)) 422 * &ftrace_file->flags))
422 * return; 423 * return;
423 * 424 *
424 * local_save_flags(irq_flags); 425 * local_save_flags(irq_flags);
425 * pc = preempt_count(); 426 * pc = preempt_count();
426 * 427 *
427 * __data_size = ftrace_get_offsets_<call>(&__data_offsets, args); 428 * __data_size = ftrace_get_offsets_<call>(&__data_offsets, args);
428 * 429 *
429 * event = trace_event_buffer_lock_reserve(&buffer, ftrace_file, 430 * event = trace_event_buffer_lock_reserve(&buffer, ftrace_file,
430 * event_<call>->event.type, 431 * event_<call>->event.type,
431 * sizeof(*entry) + __data_size, 432 * sizeof(*entry) + __data_size,
432 * irq_flags, pc); 433 * irq_flags, pc);
433 * if (!event) 434 * if (!event)
434 * return; 435 * return;
435 * entry = ring_buffer_event_data(event); 436 * entry = ring_buffer_event_data(event);
436 * 437 *
437 * { <assign>; } <-- Here we assign the entries by the __field and 438 * { <assign>; } <-- Here we assign the entries by the __field and
438 * __array macros. 439 * __array macros.
439 * 440 *
440 * if (!filter_check_discard(ftrace_file, entry, buffer, event)) 441 * if (!filter_check_discard(ftrace_file, entry, buffer, event))
441 * trace_buffer_unlock_commit(buffer, event, irq_flags, pc); 442 * trace_buffer_unlock_commit(buffer, event, irq_flags, pc);
442 * } 443 * }
443 * 444 *
444 * static struct trace_event ftrace_event_type_<call> = { 445 * static struct trace_event ftrace_event_type_<call> = {
445 * .trace = ftrace_raw_output_<call>, <-- stage 2 446 * .trace = ftrace_raw_output_<call>, <-- stage 2
446 * }; 447 * };
447 * 448 *
448 * static const char print_fmt_<call>[] = <TP_printk>; 449 * static const char print_fmt_<call>[] = <TP_printk>;
449 * 450 *
450 * static struct ftrace_event_class __used event_class_<template> = { 451 * static struct ftrace_event_class __used event_class_<template> = {
451 * .system = "<system>", 452 * .system = "<system>",
452 * .define_fields = ftrace_define_fields_<call>, 453 * .define_fields = ftrace_define_fields_<call>,
453 * .fields = LIST_HEAD_INIT(event_class_##call.fields), 454 * .fields = LIST_HEAD_INIT(event_class_##call.fields),
454 * .raw_init = trace_event_raw_init, 455 * .raw_init = trace_event_raw_init,
455 * .probe = ftrace_raw_event_##call, 456 * .probe = ftrace_raw_event_##call,
456 * .reg = ftrace_event_reg, 457 * .reg = ftrace_event_reg,
457 * }; 458 * };
458 * 459 *
459 * static struct ftrace_event_call event_<call> = { 460 * static struct ftrace_event_call event_<call> = {
460 * .name = "<call>", 461 * .name = "<call>",
461 * .class = event_class_<template>, 462 * .class = event_class_<template>,
462 * .event = &ftrace_event_type_<call>, 463 * .event = &ftrace_event_type_<call>,
463 * .print_fmt = print_fmt_<call>, 464 * .print_fmt = print_fmt_<call>,
464 * }; 465 * };
465 * // its only safe to use pointers when doing linker tricks to 466 * // its only safe to use pointers when doing linker tricks to
466 * // create an array. 467 * // create an array.
467 * static struct ftrace_event_call __used 468 * static struct ftrace_event_call __used
468 * __attribute__((section("_ftrace_events"))) *__event_<call> = &event_<call>; 469 * __attribute__((section("_ftrace_events"))) *__event_<call> = &event_<call>;
469 * 470 *
470 */ 471 */
471 472
472 #ifdef CONFIG_PERF_EVENTS 473 #ifdef CONFIG_PERF_EVENTS
473 474
474 #define _TRACE_PERF_PROTO(call, proto) \ 475 #define _TRACE_PERF_PROTO(call, proto) \
475 static notrace void \ 476 static notrace void \
476 perf_trace_##call(void *__data, proto); 477 perf_trace_##call(void *__data, proto);
477 478
478 #define _TRACE_PERF_INIT(call) \ 479 #define _TRACE_PERF_INIT(call) \
479 .perf_probe = perf_trace_##call, 480 .perf_probe = perf_trace_##call,
480 481
481 #else 482 #else
482 #define _TRACE_PERF_PROTO(call, proto) 483 #define _TRACE_PERF_PROTO(call, proto)
483 #define _TRACE_PERF_INIT(call) 484 #define _TRACE_PERF_INIT(call)
484 #endif /* CONFIG_PERF_EVENTS */ 485 #endif /* CONFIG_PERF_EVENTS */
485 486
486 #undef __entry 487 #undef __entry
487 #define __entry entry 488 #define __entry entry
488 489
489 #undef __field 490 #undef __field
490 #define __field(type, item) 491 #define __field(type, item)
491 492
492 #undef __array 493 #undef __array
493 #define __array(type, item, len) 494 #define __array(type, item, len)
494 495
495 #undef __dynamic_array 496 #undef __dynamic_array
496 #define __dynamic_array(type, item, len) \ 497 #define __dynamic_array(type, item, len) \
497 __entry->__data_loc_##item = __data_offsets.item; 498 __entry->__data_loc_##item = __data_offsets.item;
498 499
499 #undef __string 500 #undef __string
500 #define __string(item, src) __dynamic_array(char, item, -1) \ 501 #define __string(item, src) __dynamic_array(char, item, -1) \
501 502
502 #undef __assign_str 503 #undef __assign_str
503 #define __assign_str(dst, src) \ 504 #define __assign_str(dst, src) \
504 strcpy(__get_str(dst), src); 505 strcpy(__get_str(dst), (src) ? (const char *)(src) : "(null)");
505 506
506 #undef TP_fast_assign 507 #undef TP_fast_assign
507 #define TP_fast_assign(args...) args 508 #define TP_fast_assign(args...) args
508 509
509 #undef __perf_addr 510 #undef __perf_addr
510 #define __perf_addr(a) (a) 511 #define __perf_addr(a) (a)
511 512
512 #undef __perf_count 513 #undef __perf_count
513 #define __perf_count(c) (c) 514 #define __perf_count(c) (c)
514 515
515 #undef __perf_task 516 #undef __perf_task
516 #define __perf_task(t) (t) 517 #define __perf_task(t) (t)
517 518
518 #undef DECLARE_EVENT_CLASS 519 #undef DECLARE_EVENT_CLASS
519 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ 520 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
520 \ 521 \
521 static notrace void \ 522 static notrace void \
522 ftrace_raw_event_##call(void *__data, proto) \ 523 ftrace_raw_event_##call(void *__data, proto) \
523 { \ 524 { \
524 struct ftrace_event_file *ftrace_file = __data; \ 525 struct ftrace_event_file *ftrace_file = __data; \
525 struct ftrace_event_call *event_call = ftrace_file->event_call; \ 526 struct ftrace_event_call *event_call = ftrace_file->event_call; \
526 struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\ 527 struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\
527 struct ring_buffer_event *event; \ 528 struct ring_buffer_event *event; \
528 struct ftrace_raw_##call *entry; \ 529 struct ftrace_raw_##call *entry; \
529 struct ring_buffer *buffer; \ 530 struct ring_buffer *buffer; \
530 unsigned long irq_flags; \ 531 unsigned long irq_flags; \
531 int __data_size; \ 532 int __data_size; \
532 int pc; \ 533 int pc; \
533 \ 534 \
534 if (test_bit(FTRACE_EVENT_FL_SOFT_DISABLED_BIT, \ 535 if (test_bit(FTRACE_EVENT_FL_SOFT_DISABLED_BIT, \
535 &ftrace_file->flags)) \ 536 &ftrace_file->flags)) \
536 return; \ 537 return; \
537 \ 538 \
538 local_save_flags(irq_flags); \ 539 local_save_flags(irq_flags); \
539 pc = preempt_count(); \ 540 pc = preempt_count(); \
540 \ 541 \
541 __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \ 542 __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
542 \ 543 \
543 event = trace_event_buffer_lock_reserve(&buffer, ftrace_file, \ 544 event = trace_event_buffer_lock_reserve(&buffer, ftrace_file, \
544 event_call->event.type, \ 545 event_call->event.type, \
545 sizeof(*entry) + __data_size, \ 546 sizeof(*entry) + __data_size, \
546 irq_flags, pc); \ 547 irq_flags, pc); \
547 if (!event) \ 548 if (!event) \
548 return; \ 549 return; \
549 entry = ring_buffer_event_data(event); \ 550 entry = ring_buffer_event_data(event); \
550 \ 551 \
551 tstruct \ 552 tstruct \
552 \ 553 \
553 { assign; } \ 554 { assign; } \
554 \ 555 \
555 if (!filter_check_discard(ftrace_file, entry, buffer, event)) \ 556 if (!filter_check_discard(ftrace_file, entry, buffer, event)) \
556 trace_buffer_unlock_commit(buffer, event, irq_flags, pc); \ 557 trace_buffer_unlock_commit(buffer, event, irq_flags, pc); \
557 } 558 }
558 /* 559 /*
559 * The ftrace_test_probe is compiled out, it is only here as a build time check 560 * The ftrace_test_probe is compiled out, it is only here as a build time check
560 * to make sure that if the tracepoint handling changes, the ftrace probe will 561 * to make sure that if the tracepoint handling changes, the ftrace probe will
561 * fail to compile unless it too is updated. 562 * fail to compile unless it too is updated.
562 */ 563 */
563 564
564 #undef DEFINE_EVENT 565 #undef DEFINE_EVENT
565 #define DEFINE_EVENT(template, call, proto, args) \ 566 #define DEFINE_EVENT(template, call, proto, args) \
566 static inline void ftrace_test_probe_##call(void) \ 567 static inline void ftrace_test_probe_##call(void) \
567 { \ 568 { \
568 check_trace_callback_type_##call(ftrace_raw_event_##template); \ 569 check_trace_callback_type_##call(ftrace_raw_event_##template); \
569 } 570 }
570 571
571 #undef DEFINE_EVENT_PRINT 572 #undef DEFINE_EVENT_PRINT
572 #define DEFINE_EVENT_PRINT(template, name, proto, args, print) 573 #define DEFINE_EVENT_PRINT(template, name, proto, args, print)
573 574
574 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) 575 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
575 576
576 #undef __entry 577 #undef __entry
577 #define __entry REC 578 #define __entry REC
578 579
579 #undef __print_flags 580 #undef __print_flags
580 #undef __print_symbolic 581 #undef __print_symbolic
581 #undef __print_hex 582 #undef __print_hex
582 #undef __get_dynamic_array 583 #undef __get_dynamic_array
583 #undef __get_str 584 #undef __get_str
584 585
585 #undef TP_printk 586 #undef TP_printk
586 #define TP_printk(fmt, args...) "\"" fmt "\", " __stringify(args) 587 #define TP_printk(fmt, args...) "\"" fmt "\", " __stringify(args)
587 588
588 #undef DECLARE_EVENT_CLASS 589 #undef DECLARE_EVENT_CLASS
589 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ 590 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
590 _TRACE_PERF_PROTO(call, PARAMS(proto)); \ 591 _TRACE_PERF_PROTO(call, PARAMS(proto)); \
591 static const char print_fmt_##call[] = print; \ 592 static const char print_fmt_##call[] = print; \
592 static struct ftrace_event_class __used __refdata event_class_##call = { \ 593 static struct ftrace_event_class __used __refdata event_class_##call = { \
593 .system = __stringify(TRACE_SYSTEM), \ 594 .system = __stringify(TRACE_SYSTEM), \
594 .define_fields = ftrace_define_fields_##call, \ 595 .define_fields = ftrace_define_fields_##call, \
595 .fields = LIST_HEAD_INIT(event_class_##call.fields),\ 596 .fields = LIST_HEAD_INIT(event_class_##call.fields),\
596 .raw_init = trace_event_raw_init, \ 597 .raw_init = trace_event_raw_init, \
597 .probe = ftrace_raw_event_##call, \ 598 .probe = ftrace_raw_event_##call, \
598 .reg = ftrace_event_reg, \ 599 .reg = ftrace_event_reg, \
599 _TRACE_PERF_INIT(call) \ 600 _TRACE_PERF_INIT(call) \
600 }; 601 };
601 602
602 #undef DEFINE_EVENT 603 #undef DEFINE_EVENT
603 #define DEFINE_EVENT(template, call, proto, args) \ 604 #define DEFINE_EVENT(template, call, proto, args) \
604 \ 605 \
605 static struct ftrace_event_call __used event_##call = { \ 606 static struct ftrace_event_call __used event_##call = { \
606 .name = #call, \ 607 .name = #call, \
607 .class = &event_class_##template, \ 608 .class = &event_class_##template, \
608 .event.funcs = &ftrace_event_type_funcs_##template, \ 609 .event.funcs = &ftrace_event_type_funcs_##template, \
609 .print_fmt = print_fmt_##template, \ 610 .print_fmt = print_fmt_##template, \
610 }; \ 611 }; \
611 static struct ftrace_event_call __used \ 612 static struct ftrace_event_call __used \
612 __attribute__((section("_ftrace_events"))) *__event_##call = &event_##call 613 __attribute__((section("_ftrace_events"))) *__event_##call = &event_##call
613 614
614 #undef DEFINE_EVENT_PRINT 615 #undef DEFINE_EVENT_PRINT
615 #define DEFINE_EVENT_PRINT(template, call, proto, args, print) \ 616 #define DEFINE_EVENT_PRINT(template, call, proto, args, print) \
616 \ 617 \
617 static const char print_fmt_##call[] = print; \ 618 static const char print_fmt_##call[] = print; \
618 \ 619 \
619 static struct ftrace_event_call __used event_##call = { \ 620 static struct ftrace_event_call __used event_##call = { \
620 .name = #call, \ 621 .name = #call, \
621 .class = &event_class_##template, \ 622 .class = &event_class_##template, \
622 .event.funcs = &ftrace_event_type_funcs_##call, \ 623 .event.funcs = &ftrace_event_type_funcs_##call, \
623 .print_fmt = print_fmt_##call, \ 624 .print_fmt = print_fmt_##call, \
624 }; \ 625 }; \
625 static struct ftrace_event_call __used \ 626 static struct ftrace_event_call __used \
626 __attribute__((section("_ftrace_events"))) *__event_##call = &event_##call 627 __attribute__((section("_ftrace_events"))) *__event_##call = &event_##call
627 628
628 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) 629 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
629 630
630 631
631 #ifdef CONFIG_PERF_EVENTS 632 #ifdef CONFIG_PERF_EVENTS
632 633
633 #undef __entry 634 #undef __entry
634 #define __entry entry 635 #define __entry entry
635 636
636 #undef __get_dynamic_array 637 #undef __get_dynamic_array
637 #define __get_dynamic_array(field) \ 638 #define __get_dynamic_array(field) \
638 ((void *)__entry + (__entry->__data_loc_##field & 0xffff)) 639 ((void *)__entry + (__entry->__data_loc_##field & 0xffff))
639 640
640 #undef __get_str 641 #undef __get_str
641 #define __get_str(field) (char *)__get_dynamic_array(field) 642 #define __get_str(field) (char *)__get_dynamic_array(field)
642 643
643 #undef __perf_addr 644 #undef __perf_addr
644 #define __perf_addr(a) (__addr = (a)) 645 #define __perf_addr(a) (__addr = (a))
645 646
646 #undef __perf_count 647 #undef __perf_count
647 #define __perf_count(c) (__count = (c)) 648 #define __perf_count(c) (__count = (c))
648 649
649 #undef __perf_task 650 #undef __perf_task
650 #define __perf_task(t) (__task = (t)) 651 #define __perf_task(t) (__task = (t))
651 652
652 #undef DECLARE_EVENT_CLASS 653 #undef DECLARE_EVENT_CLASS
653 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ 654 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
654 static notrace void \ 655 static notrace void \
655 perf_trace_##call(void *__data, proto) \ 656 perf_trace_##call(void *__data, proto) \
656 { \ 657 { \
657 struct ftrace_event_call *event_call = __data; \ 658 struct ftrace_event_call *event_call = __data; \
658 struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\ 659 struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\
659 struct ftrace_raw_##call *entry; \ 660 struct ftrace_raw_##call *entry; \
660 struct pt_regs __regs; \ 661 struct pt_regs __regs; \
661 u64 __addr = 0, __count = 1; \ 662 u64 __addr = 0, __count = 1; \
662 struct task_struct *__task = NULL; \ 663 struct task_struct *__task = NULL; \
663 struct hlist_head *head; \ 664 struct hlist_head *head; \
664 int __entry_size; \ 665 int __entry_size; \
665 int __data_size; \ 666 int __data_size; \
666 int rctx; \ 667 int rctx; \
667 \ 668 \
668 __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \ 669 __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
669 \ 670 \
670 head = this_cpu_ptr(event_call->perf_events); \ 671 head = this_cpu_ptr(event_call->perf_events); \
671 if (__builtin_constant_p(!__task) && !__task && \ 672 if (__builtin_constant_p(!__task) && !__task && \
672 hlist_empty(head)) \ 673 hlist_empty(head)) \
673 return; \ 674 return; \
674 \ 675 \
675 __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),\ 676 __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),\
676 sizeof(u64)); \ 677 sizeof(u64)); \
677 __entry_size -= sizeof(u32); \ 678 __entry_size -= sizeof(u32); \
678 \ 679 \
679 perf_fetch_caller_regs(&__regs); \ 680 perf_fetch_caller_regs(&__regs); \
680 entry = perf_trace_buf_prepare(__entry_size, \ 681 entry = perf_trace_buf_prepare(__entry_size, \
681 event_call->event.type, &__regs, &rctx); \ 682 event_call->event.type, &__regs, &rctx); \
682 if (!entry) \ 683 if (!entry) \
683 return; \ 684 return; \
684 \ 685 \
685 tstruct \ 686 tstruct \
686 \ 687 \
687 { assign; } \ 688 { assign; } \
688 \ 689 \
689 perf_trace_buf_submit(entry, __entry_size, rctx, __addr, \ 690 perf_trace_buf_submit(entry, __entry_size, rctx, __addr, \
690 __count, &__regs, head, __task); \ 691 __count, &__regs, head, __task); \
691 } 692 }
692 693
693 /* 694 /*
694 * This part is compiled out, it is only here as a build time check 695 * This part is compiled out, it is only here as a build time check
695 * to make sure that if the tracepoint handling changes, the 696 * to make sure that if the tracepoint handling changes, the
696 * perf probe will fail to compile unless it too is updated. 697 * perf probe will fail to compile unless it too is updated.
697 */ 698 */
698 #undef DEFINE_EVENT 699 #undef DEFINE_EVENT
699 #define DEFINE_EVENT(template, call, proto, args) \ 700 #define DEFINE_EVENT(template, call, proto, args) \
700 static inline void perf_test_probe_##call(void) \ 701 static inline void perf_test_probe_##call(void) \
701 { \ 702 { \
702 check_trace_callback_type_##call(perf_trace_##template); \ 703 check_trace_callback_type_##call(perf_trace_##template); \
703 } 704 }
704 705
705 706
706 #undef DEFINE_EVENT_PRINT 707 #undef DEFINE_EVENT_PRINT
707 #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ 708 #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
708 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) 709 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
709 710
710 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) 711 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
711 #endif /* CONFIG_PERF_EVENTS */ 712 #endif /* CONFIG_PERF_EVENTS */
712 713
713 714