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5f9c39dc FW |
1 | #include "builtin.h" |
2 | ||
3 | #include "util/util.h" | |
4 | #include "util/cache.h" | |
5 | #include "util/symbol.h" | |
6 | #include "util/thread.h" | |
7 | #include "util/header.h" | |
8 | ||
9 | #include "util/parse-options.h" | |
10 | ||
11 | #include "perf.h" | |
12 | #include "util/debug.h" | |
13 | ||
14 | #include "util/trace-event.h" | |
15 | ||
16 | static char const *input_name = "perf.data"; | |
17 | static int input; | |
18 | static unsigned long page_size; | |
19 | static unsigned long mmap_window = 32; | |
20 | ||
21 | static unsigned long total = 0; | |
22 | static unsigned long total_comm = 0; | |
23 | ||
24 | static struct rb_root threads; | |
25 | static struct thread *last_match; | |
26 | ||
27 | static struct perf_header *header; | |
28 | static u64 sample_type; | |
29 | ||
30 | ||
31 | static int | |
32 | process_comm_event(event_t *event, unsigned long offset, unsigned long head) | |
33 | { | |
34 | struct thread *thread; | |
35 | ||
36 | thread = threads__findnew(event->comm.pid, &threads, &last_match); | |
37 | ||
cdd6c482 | 38 | dump_printf("%p [%p]: PERF_RECORD_COMM: %s:%d\n", |
5f9c39dc FW |
39 | (void *)(offset + head), |
40 | (void *)(long)(event->header.size), | |
41 | event->comm.comm, event->comm.pid); | |
42 | ||
43 | if (thread == NULL || | |
44 | thread__set_comm(thread, event->comm.comm)) { | |
cdd6c482 | 45 | dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n"); |
5f9c39dc FW |
46 | return -1; |
47 | } | |
48 | total_comm++; | |
49 | ||
50 | return 0; | |
51 | } | |
52 | ||
53 | static int | |
54 | process_sample_event(event_t *event, unsigned long offset, unsigned long head) | |
55 | { | |
5f9c39dc FW |
56 | struct thread *thread; |
57 | u64 ip = event->ip.ip; | |
6ddf259d | 58 | u64 timestamp = -1; |
cd6feeea | 59 | u32 cpu = -1; |
5f9c39dc FW |
60 | u64 period = 1; |
61 | void *more_data = event->ip.__more_data; | |
5f9c39dc FW |
62 | |
63 | thread = threads__findnew(event->ip.pid, &threads, &last_match); | |
64 | ||
6ddf259d IM |
65 | if (sample_type & PERF_SAMPLE_TIME) { |
66 | timestamp = *(u64 *)more_data; | |
67 | more_data += sizeof(u64); | |
68 | } | |
69 | ||
cd6feeea IM |
70 | if (sample_type & PERF_SAMPLE_CPU) { |
71 | cpu = *(u32 *)more_data; | |
72 | more_data += sizeof(u32); | |
73 | more_data += sizeof(u32); /* reserved */ | |
74 | } | |
75 | ||
5f9c39dc FW |
76 | if (sample_type & PERF_SAMPLE_PERIOD) { |
77 | period = *(u64 *)more_data; | |
78 | more_data += sizeof(u64); | |
79 | } | |
80 | ||
cdd6c482 | 81 | dump_printf("%p [%p]: PERF_RECORD_SAMPLE (IP, %d): %d/%d: %p period: %Ld\n", |
5f9c39dc FW |
82 | (void *)(offset + head), |
83 | (void *)(long)(event->header.size), | |
84 | event->header.misc, | |
85 | event->ip.pid, event->ip.tid, | |
86 | (void *)(long)ip, | |
87 | (long long)period); | |
88 | ||
89 | dump_printf(" ... thread: %s:%d\n", thread->comm, thread->pid); | |
90 | ||
91 | if (thread == NULL) { | |
92 | eprintf("problem processing %d event, skipping it.\n", | |
93 | event->header.type); | |
94 | return -1; | |
95 | } | |
96 | ||
5f9c39dc FW |
97 | if (sample_type & PERF_SAMPLE_RAW) { |
98 | struct { | |
99 | u32 size; | |
100 | char data[0]; | |
101 | } *raw = more_data; | |
102 | ||
103 | /* | |
104 | * FIXME: better resolve from pid from the struct trace_entry | |
105 | * field, although it should be the same than this perf | |
106 | * event pid | |
107 | */ | |
6ddf259d | 108 | print_event(cpu, raw->data, raw->size, timestamp, thread->comm); |
5f9c39dc FW |
109 | } |
110 | total += period; | |
111 | ||
112 | return 0; | |
113 | } | |
114 | ||
115 | static int | |
116 | process_event(event_t *event, unsigned long offset, unsigned long head) | |
117 | { | |
118 | trace_event(event); | |
119 | ||
120 | switch (event->header.type) { | |
cdd6c482 | 121 | case PERF_RECORD_MMAP ... PERF_RECORD_LOST: |
5f9c39dc FW |
122 | return 0; |
123 | ||
cdd6c482 | 124 | case PERF_RECORD_COMM: |
5f9c39dc FW |
125 | return process_comm_event(event, offset, head); |
126 | ||
cdd6c482 | 127 | case PERF_RECORD_EXIT ... PERF_RECORD_READ: |
5f9c39dc FW |
128 | return 0; |
129 | ||
cdd6c482 | 130 | case PERF_RECORD_SAMPLE: |
5f9c39dc FW |
131 | return process_sample_event(event, offset, head); |
132 | ||
cdd6c482 | 133 | case PERF_RECORD_MAX: |
5f9c39dc FW |
134 | default: |
135 | return -1; | |
136 | } | |
137 | ||
138 | return 0; | |
139 | } | |
140 | ||
141 | static int __cmd_trace(void) | |
142 | { | |
143 | int ret, rc = EXIT_FAILURE; | |
144 | unsigned long offset = 0; | |
145 | unsigned long head = 0; | |
b209aa1f | 146 | unsigned long shift; |
5f9c39dc FW |
147 | struct stat perf_stat; |
148 | event_t *event; | |
149 | uint32_t size; | |
150 | char *buf; | |
151 | ||
3a2684ca | 152 | register_idle_thread(&threads, &last_match); |
5f9c39dc FW |
153 | |
154 | input = open(input_name, O_RDONLY); | |
155 | if (input < 0) { | |
156 | perror("failed to open file"); | |
157 | exit(-1); | |
158 | } | |
159 | ||
160 | ret = fstat(input, &perf_stat); | |
161 | if (ret < 0) { | |
162 | perror("failed to stat file"); | |
163 | exit(-1); | |
164 | } | |
165 | ||
166 | if (!perf_stat.st_size) { | |
167 | fprintf(stderr, "zero-sized file, nothing to do!\n"); | |
168 | exit(0); | |
169 | } | |
170 | header = perf_header__read(input); | |
8886f42d | 171 | head = header->data_offset; |
5f9c39dc FW |
172 | sample_type = perf_header__sample_type(header); |
173 | ||
4bf2364a FW |
174 | if (!(sample_type & PERF_SAMPLE_RAW)) |
175 | die("No trace sample to read. Did you call perf record " | |
176 | "without -R?"); | |
177 | ||
5f9c39dc FW |
178 | if (load_kernel() < 0) { |
179 | perror("failed to load kernel symbols"); | |
180 | return EXIT_FAILURE; | |
181 | } | |
182 | ||
b209aa1f FW |
183 | shift = page_size * (head / page_size); |
184 | offset += shift; | |
185 | head -= shift; | |
186 | ||
5f9c39dc FW |
187 | remap: |
188 | buf = (char *)mmap(NULL, page_size * mmap_window, PROT_READ, | |
189 | MAP_SHARED, input, offset); | |
190 | if (buf == MAP_FAILED) { | |
191 | perror("failed to mmap file"); | |
192 | exit(-1); | |
193 | } | |
194 | ||
195 | more: | |
196 | event = (event_t *)(buf + head); | |
197 | ||
5f9c39dc | 198 | if (head + event->header.size >= page_size * mmap_window) { |
5f9c39dc FW |
199 | int res; |
200 | ||
b209aa1f | 201 | shift = page_size * (head / page_size); |
5f9c39dc FW |
202 | res = munmap(buf, page_size * mmap_window); |
203 | assert(res == 0); | |
204 | ||
205 | offset += shift; | |
206 | head -= shift; | |
207 | goto remap; | |
208 | } | |
209 | ||
210 | size = event->header.size; | |
211 | ||
5f9c39dc FW |
212 | if (!size || process_event(event, offset, head) < 0) { |
213 | ||
214 | /* | |
215 | * assume we lost track of the stream, check alignment, and | |
216 | * increment a single u64 in the hope to catch on again 'soon'. | |
217 | */ | |
218 | ||
219 | if (unlikely(head & 7)) | |
220 | head &= ~7ULL; | |
221 | ||
222 | size = 8; | |
223 | } | |
224 | ||
225 | head += size; | |
226 | ||
227 | if (offset + head < (unsigned long)perf_stat.st_size) | |
228 | goto more; | |
229 | ||
230 | rc = EXIT_SUCCESS; | |
231 | close(input); | |
232 | ||
233 | return rc; | |
234 | } | |
235 | ||
236 | static const char * const annotate_usage[] = { | |
237 | "perf trace [<options>] <command>", | |
238 | NULL | |
239 | }; | |
240 | ||
241 | static const struct option options[] = { | |
242 | OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace, | |
243 | "dump raw trace in ASCII"), | |
244 | OPT_BOOLEAN('v', "verbose", &verbose, | |
245 | "be more verbose (show symbol address, etc)"), | |
1909629f | 246 | OPT_END() |
5f9c39dc FW |
247 | }; |
248 | ||
249 | int cmd_trace(int argc, const char **argv, const char *prefix __used) | |
250 | { | |
251 | symbol__init(); | |
252 | page_size = getpagesize(); | |
253 | ||
254 | argc = parse_options(argc, argv, options, annotate_usage, 0); | |
255 | if (argc) { | |
256 | /* | |
257 | * Special case: if there's an argument left then assume tha | |
258 | * it's a symbol filter: | |
259 | */ | |
260 | if (argc > 1) | |
261 | usage_with_options(annotate_usage, options); | |
262 | } | |
263 | ||
5f9c39dc FW |
264 | setup_pager(); |
265 | ||
266 | return __cmd_trace(); | |
267 | } |