int main (int argc, char **argv)
{
int c;
errno = 0;
if (argc < 2)
usage(argv);
if (strcmp(argv[1], "report") == 0) {
trace_report(argc, argv);
exit(0);
} else if (strcmp(argv[1], "snapshot") == 0) {
trace_snapshot(argc, argv);
exit(0);
} else if (strcmp(argv[1], "hist") == 0) {
trace_hist(argc, argv);
exit(0);
} else if (strcmp(argv[1], "mem") == 0) {
trace_mem(argc, argv);
exit(0);
} else if (strcmp(argv[1], "listen") == 0) {
trace_listen(argc, argv);
exit(0);
} else if (strcmp(argv[1], "split") == 0) {
trace_split(argc, argv);
exit(0);
} else if (strcmp(argv[1], "restore") == 0) {
trace_restore(argc, argv);
exit(0);
} else if (strcmp(argv[1], "stack") == 0) {
trace_stack(argc, argv);
exit(0);
} else if (strcmp(argv[1], "check-events") == 0) {
const char *tracing;
int ret;
struct pevent *pevent = NULL;
struct plugin_list *list = NULL;
while ((c = getopt(argc-1, argv+1, "+hN")) >= 0) {
switch (c) {
case 'h':
default:
usage(argv);
break;
case 'N':
tracecmd_disable_plugins = 1;
break;
}
}
tracing = tracecmd_get_tracing_dir();
if (!tracing) {
printf("Can not find or mount tracing directory!\n"
"Either tracing is not configured for this "
"kernel\n"
"or you do not have the proper permissions to "
"mount the directory");
exit(EINVAL);
}
pevent = pevent_alloc();
if (!pevent)
exit(EINVAL);
list = tracecmd_load_plugins(pevent);
ret = tracecmd_fill_local_events(tracing, pevent);
if (ret || pevent->parsing_failures)
ret = EINVAL;
tracecmd_unload_plugins(list, pevent);
pevent_free(pevent);
exit(ret);
} else if (strcmp(argv[1], "record") == 0 ||
strcmp(argv[1], "start") == 0 ||
strcmp(argv[1], "extract") == 0 ||
strcmp(argv[1], "stop") == 0 ||
strcmp(argv[1], "stream") == 0 ||
strcmp(argv[1], "profile") == 0 ||
strcmp(argv[1], "restart") == 0 ||
strcmp(argv[1], "reset") == 0) {
trace_record(argc, argv);
exit(0);
} else if (strcmp(argv[1], "stat") == 0) {
trace_stat(argc, argv);
exit(0);
} else if (strcmp(argv[1], "options") == 0) {
show_plugin_options();
exit(0);
} else if (strcmp(argv[1], "show") == 0) {
const char *buffer = NULL;
const char *file = "trace";
const char *cpu = NULL;
struct buffer_instance *instance = &top_instance;
char cpu_path[128];
char *path;
int snap = 0;
int pipe = 0;
int show_name = 0;
int option_index = 0;
int stop = 0;
static struct option long_options[] = {
{"tracing_on", no_argument, NULL, OPT_tracing_on},
{"current_tracer", no_argument, NULL, OPT_current_tracer},
{"buffer_size", no_argument, NULL, OPT_buffer_size_kb},
{"buffer_total_size", no_argument, NULL, OPT_buffer_total_size_kb},
{"ftrace_filter", no_argument, NULL, OPT_ftrace_filter},
{"ftrace_notrace", no_argument, NULL, OPT_ftrace_notrace},
{"ftrace_pid", no_argument, NULL, OPT_ftrace_pid},
{"graph_function", no_argument, NULL, OPT_graph_function},
{"graph_notrace", no_argument, NULL, OPT_graph_notrace},
{"cpumask", no_argument, NULL, OPT_cpumask},
{"help", no_argument, NULL, '?'},
{NULL, 0, NULL, 0}
};
while ((c = getopt_long(argc-1, argv+1, "B:c:fsp",
long_options, &option_index)) >= 0) {
switch (c) {
case 'h':
usage(argv);
break;
case 'B':
if (buffer)
die("Can only show one buffer at a time");
buffer = optarg;
instance = create_instance(optarg);
if (!instance)
die("Failed to create instance");
break;
case 'c':
if (cpu)
die("Can only show one CPU at a time");
cpu = optarg;
break;
case 'f':
show_name = 1;
break;
case 's':
snap = 1;
if (pipe)
die("Can not have -s and -p together");
break;
case 'p':
pipe = 1;
if (snap)
die("Can not have -s and -p together");
break;
case OPT_tracing_on:
show_instance_file(instance, "tracing_on");
stop = 1;
break;
case OPT_current_tracer:
show_instance_file(instance, "current_tracer");
stop = 1;
break;
case OPT_buffer_size_kb:
show_instance_file(instance, "buffer_size_kb");
stop = 1;
break;
case OPT_buffer_total_size_kb:
show_instance_file(instance, "buffer_total_size_kb");
stop = 1;
break;
case OPT_ftrace_filter:
show_instance_file(instance, "set_ftrace_filter");
stop = 1;
break;
case OPT_ftrace_notrace:
show_instance_file(instance, "set_ftrace_notrace");
stop = 1;
break;
case OPT_ftrace_pid:
show_instance_file(instance, "set_ftrace_pid");
stop = 1;
break;
case OPT_graph_function:
show_instance_file(instance, "set_graph_function");
stop = 1;
break;
case OPT_graph_notrace:
show_instance_file(instance, "set_graph_notrace");
stop = 1;
break;
case OPT_cpumask:
show_instance_file(instance, "tracing_cpumask");
stop = 1;
break;
default:
usage(argv);
}
}
if (stop)
exit(0);
if (pipe)
file = "trace_pipe";
else if (snap)
file = "snapshot";
if (cpu) {
snprintf(cpu_path, 128, "per_cpu/cpu%d/%s", atoi(cpu), file);
file = cpu_path;
}
if (buffer) {
path = malloc(strlen(buffer) + strlen("instances//") +
strlen(file) + 1);
if (path)
die("Failed to allocate instance path %s", file);
sprintf(path, "instances/%s/%s", buffer, file);
file = path;
}
if (show_name) {
char *name;
name = tracecmd_get_tracing_file(file);
printf("%s\n", name);
tracecmd_put_tracing_file(name);
}
show_file(file);
if (buffer)
free(path);
exit(0);
} else if (strcmp(argv[1], "list") == 0) {
int events = 0;
int tracer = 0;
int options = 0;
int funcs = 0;
int buffers = 0;
int clocks = 0;
int plug = 0;
int plug_op = 0;
int flags = 0;
int show_all = 1;
int i;
const char *arg;
const char *funcre = NULL;
const char *eventre = NULL;
for (i = 2; i < argc; i++) {
arg = NULL;
if (argv[i][0] == '-') {
if (i < argc - 1) {
if (argv[i+1][0] != '-')
arg = argv[i+1];
}
switch (argv[i][1]) {
case 'h':
usage(argv);
break;
case 'e':
events = 1;
eventre = arg;
show_all = 0;
break;
case 'B':
buffers = 1;
show_all = 0;
break;
case 'C':
clocks = 1;
show_all = 0;
break;
case 'F':
flags |= SHOW_EVENT_FORMAT;
break;
case 'R':
flags |= SHOW_EVENT_TRIGGER;
break;
case 'l':
flags |= SHOW_EVENT_FILTER;
break;
case 'p':
case 't':
tracer = 1;
show_all = 0;
break;
case 'P':
plug = 1;
show_all = 0;
break;
case 'O':
plug_op = 1;
show_all = 0;
break;
case 'o':
options = 1;
show_all = 0;
break;
case 'f':
funcs = 1;
funcre = arg;
show_all = 0;
break;
default:
fprintf(stderr, "list: invalid option -- '%c'\n",
argv[optind][1]);
usage(argv);
}
}
}
if (events)
show_events(eventre, flags);
if (tracer)
show_tracers();
if (options)
show_options();
if (plug)
show_plugins();
if (plug_op)
show_plugin_options();
if (funcs)
show_functions(funcre);
if (buffers)
show_buffers();
if (clocks)
show_clocks();
if (show_all) {
printf("events:\n");
show_events(NULL, 0);
printf("\ntracers:\n");
show_tracers();
printf("\noptions:\n");
show_options();
}
exit(0);
} else if (strcmp(argv[1], "-h") == 0 ||
strcmp(argv[1], "help") == 0) {
usage(argv);
} else {
fprintf(stderr, "unknown command: %s\n", argv[1]);
usage(argv);
}
return 0;
}
static int __cmd_trace(void)
{
int ret, rc = EXIT_FAILURE;
unsigned long offset = 0;
unsigned long head = 0;
struct stat perf_stat;
event_t *event;
uint32_t size;
char *buf;
trace_report();
register_idle_thread(&threads, &last_match);
input = open(input_name, O_RDONLY);
if (input < 0) {
perror("failed to open file");
exit(-1);
}
ret = fstat(input, &perf_stat);
if (ret < 0) {
perror("failed to stat file");
exit(-1);
}
if (!perf_stat.st_size) {
fprintf(stderr, "zero-sized file, nothing to do!\n");
exit(0);
}
header = perf_header__read(input);
head = header->data_offset;
sample_type = perf_header__sample_type(header);
if (!(sample_type & PERF_SAMPLE_RAW))
die("No trace sample to read. Did you call perf record "
"without -R?");
if (load_kernel() < 0) {
perror("failed to load kernel symbols");
return EXIT_FAILURE;
}
remap:
buf = (char *)mmap(NULL, page_size * mmap_window, PROT_READ,
MAP_SHARED, input, offset);
if (buf == MAP_FAILED) {
perror("failed to mmap file");
exit(-1);
}
more:
event = (event_t *)(buf + head);
if (head + event->header.size >= page_size * mmap_window) {
unsigned long shift = page_size * (head / page_size);
int res;
res = munmap(buf, page_size * mmap_window);
assert(res == 0);
offset += shift;
head -= shift;
goto remap;
}
size = event->header.size;
if (!size || process_event(event, offset, head) < 0) {
/*
* assume we lost track of the stream, check alignment, and
* increment a single u64 in the hope to catch on again 'soon'.
*/
if (unlikely(head & 7))
head &= ~7ULL;
size = 8;
}
head += size;
if (offset + head < (unsigned long)perf_stat.st_size)
goto more;
rc = EXIT_SUCCESS;
close(input);
return rc;
}
