aboutsummaryrefslogtreecommitdiffstats
path: root/tools/perf/builtin-trace.c
blob: d042d656c5616d5a17cd509a079a5809902bb036 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
#include "builtin.h"

#include "util/util.h"
#include "util/cache.h"
#include "util/symbol.h"
#include "util/thread.h"
#include "util/header.h"

#include "util/parse-options.h"

#include "perf.h"
#include "util/debug.h"

#include "util/trace-event.h"
#include "util/data_map.h"

static char		const *input_name = "perf.data";

static unsigned long	total = 0;
static unsigned long	total_comm = 0;

static struct perf_header *header;
static u64		sample_type;

static char		*cwd;
static int		cwdlen;


static int
process_comm_event(event_t *event, unsigned long offset, unsigned long head)
{
	struct thread *thread = threads__findnew(event->comm.pid);

	dump_printf("%p [%p]: PERF_RECORD_COMM: %s:%d\n",
		(void *)(offset + head),
		(void *)(long)(event->header.size),
		event->comm.comm, event->comm.pid);

	if (thread == NULL ||
	    thread__set_comm(thread, event->comm.comm)) {
		dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n");
		return -1;
	}
	total_comm++;

	return 0;
}

static int
process_sample_event(event_t *event, unsigned long offset, unsigned long head)
{
	u64 ip = event->ip.ip;
	u64 timestamp = -1;
	u32 cpu = -1;
	u64 period = 1;
	void *more_data = event->ip.__more_data;
	struct thread *thread = threads__findnew(event->ip.pid);

	if (sample_type & PERF_SAMPLE_TIME) {
		timestamp = *(u64 *)more_data;
		more_data += sizeof(u64);
	}

	if (sample_type & PERF_SAMPLE_CPU) {
		cpu = *(u32 *)more_data;
		more_data += sizeof(u32);
		more_data += sizeof(u32); /* reserved */
	}

	if (sample_type & PERF_SAMPLE_PERIOD) {
		period = *(u64 *)more_data;
		more_data += sizeof(u64);
	}

	dump_printf("%p [%p]: PERF_RECORD_SAMPLE (IP, %d): %d/%d: %p period: %Ld\n",
		(void *)(offset + head),
		(void *)(long)(event->header.size),
		event->header.misc,
		event->ip.pid, event->ip.tid,
		(void *)(long)ip,
		(long long)period);

	if (thread == NULL) {
		pr_debug("problem processing %d event, skipping it.\n",
			 event->header.type);
		return -1;
	}

	dump_printf(" ... thread: %s:%d\n", thread->comm, thread->pid);

	if (sample_type & PERF_SAMPLE_RAW) {
		struct {
			u32 size;
			char data[0];
		} *raw = more_data;

		/*
		 * FIXME: better resolve from pid from the struct trace_entry
		 * field, although it should be the same than this perf
		 * event pid
		 */
		print_event(cpu, raw->data, raw->size, timestamp, thread->comm);
	}
	total += period;

	return 0;
}

static int sample_type_check(u64 type)
{
	sample_type = type;

	if (!(sample_type & PERF_SAMPLE_RAW)) {
		fprintf(stderr,
			"No trace sample to read. Did you call perf record "
			"without -R?");
		return -1;
	}

	return 0;
}

static struct perf_file_handler file_handler = {
	.process_sample_event	= process_sample_event,
	.process_comm_event	= process_comm_event,
	.sample_type_check	= sample_type_check,
};

static int __cmd_trace(void)
{
	register_idle_thread();
	register_perf_file_handler(&file_handler);

	return mmap_dispatch_perf_file(&header, input_name, 0, 0, &cwdlen, &cwd);
}

static const char * const annotate_usage[] = {
	"perf trace [<options>] <command>",
	NULL
};

static const struct option options[] = {
	OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
		    "dump raw trace in ASCII"),
	OPT_BOOLEAN('v', "verbose", &verbose,
		    "be more verbose (show symbol address, etc)"),
	OPT_BOOLEAN('l', "latency", &latency_format,
		    "show latency attributes (irqs/preemption disabled, etc)"),
	OPT_END()
};

int cmd_trace(int argc, const char **argv, const char *prefix __used)
{
	symbol__init(0);

	argc = parse_options(argc, argv, options, annotate_usage, 0);
	if (argc) {
		/*
		 * Special case: if there's an argument left then assume tha
		 * it's a symbol filter:
		 */
		if (argc > 1)
			usage_with_options(annotate_usage, options);
	}

	setup_pager();

	return __cmd_trace();
}