linux/tools/perf/builtin-trace.c

376 lines
7.4 KiB
C

#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/exec_cmd.h"
#include "util/trace-event.h"
#include "util/session.h"
static char const *script_name;
static char const *generate_script_lang;
static int default_start_script(const char *script __attribute((unused)))
{
return 0;
}
static int default_stop_script(void)
{
return 0;
}
static int default_generate_script(const char *outfile __attribute ((unused)))
{
return 0;
}
static struct scripting_ops default_scripting_ops = {
.start_script = default_start_script,
.stop_script = default_stop_script,
.process_event = print_event,
.generate_script = default_generate_script,
};
static struct scripting_ops *scripting_ops;
static void setup_scripting(void)
{
/* make sure PERF_EXEC_PATH is set for scripts */
perf_set_argv_exec_path(perf_exec_path());
setup_perl_scripting();
scripting_ops = &default_scripting_ops;
}
static int cleanup_scripting(void)
{
return scripting_ops->stop_script();
}
#include "util/parse-options.h"
#include "perf.h"
#include "util/debug.h"
#include "util/trace-event.h"
#include "util/data_map.h"
#include "util/exec_cmd.h"
static char const *input_name = "perf.data";
static struct perf_session *session;
static u64 sample_type;
static int process_sample_event(event_t *event)
{
struct sample_data data;
struct thread *thread;
memset(&data, 0, sizeof(data));
data.time = -1;
data.cpu = -1;
data.period = 1;
event__parse_sample(event, sample_type, &data);
dump_printf("(IP, %d): %d/%d: %p period: %Ld\n",
event->header.misc,
data.pid, data.tid,
(void *)(long)data.ip,
(long long)data.period);
thread = threads__findnew(event->ip.pid);
if (thread == NULL) {
pr_debug("problem processing %d event, skipping it.\n",
event->header.type);
return -1;
}
if (sample_type & PERF_SAMPLE_RAW) {
/*
* FIXME: better resolve from pid from the struct trace_entry
* field, although it should be the same than this perf
* event pid
*/
scripting_ops->process_event(data.cpu, data.raw_data,
data.raw_size,
data.time, thread->comm);
}
event__stats.total += data.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 = event__process_comm,
.sample_type_check = sample_type_check,
};
static int __cmd_trace(void)
{
int err;
session = perf_session__new(input_name, O_RDONLY, 0);
if (session == NULL)
return -ENOMEM;
register_idle_thread();
register_perf_file_handler(&file_handler);
err = perf_session__process_events(session, 0, &event__cwdlen, &event__cwd);
perf_session__delete(session);
return err;
}
struct script_spec {
struct list_head node;
struct scripting_ops *ops;
char spec[0];
};
LIST_HEAD(script_specs);
static struct script_spec *script_spec__new(const char *spec,
struct scripting_ops *ops)
{
struct script_spec *s = malloc(sizeof(*s) + strlen(spec) + 1);
if (s != NULL) {
strcpy(s->spec, spec);
s->ops = ops;
}
return s;
}
static void script_spec__delete(struct script_spec *s)
{
free(s->spec);
free(s);
}
static void script_spec__add(struct script_spec *s)
{
list_add_tail(&s->node, &script_specs);
}
static struct script_spec *script_spec__find(const char *spec)
{
struct script_spec *s;
list_for_each_entry(s, &script_specs, node)
if (strcasecmp(s->spec, spec) == 0)
return s;
return NULL;
}
static struct script_spec *script_spec__findnew(const char *spec,
struct scripting_ops *ops)
{
struct script_spec *s = script_spec__find(spec);
if (s)
return s;
s = script_spec__new(spec, ops);
if (!s)
goto out_delete_spec;
script_spec__add(s);
return s;
out_delete_spec:
script_spec__delete(s);
return NULL;
}
int script_spec_register(const char *spec, struct scripting_ops *ops)
{
struct script_spec *s;
s = script_spec__find(spec);
if (s)
return -1;
s = script_spec__findnew(spec, ops);
if (!s)
return -1;
return 0;
}
static struct scripting_ops *script_spec__lookup(const char *spec)
{
struct script_spec *s = script_spec__find(spec);
if (!s)
return NULL;
return s->ops;
}
static void list_available_languages(void)
{
struct script_spec *s;
fprintf(stderr, "\n");
fprintf(stderr, "Scripting language extensions (used in "
"perf trace -s [spec:]script.[spec]):\n\n");
list_for_each_entry(s, &script_specs, node)
fprintf(stderr, " %-42s [%s]\n", s->spec, s->ops->name);
fprintf(stderr, "\n");
}
static int parse_scriptname(const struct option *opt __used,
const char *str, int unset __used)
{
char spec[PATH_MAX];
const char *script, *ext;
int len;
if (strcmp(str, "list") == 0) {
list_available_languages();
return 0;
}
script = strchr(str, ':');
if (script) {
len = script - str;
if (len >= PATH_MAX) {
fprintf(stderr, "invalid language specifier");
return -1;
}
strncpy(spec, str, len);
spec[len] = '\0';
scripting_ops = script_spec__lookup(spec);
if (!scripting_ops) {
fprintf(stderr, "invalid language specifier");
return -1;
}
script++;
} else {
script = str;
ext = strchr(script, '.');
if (!ext) {
fprintf(stderr, "invalid script extension");
return -1;
}
scripting_ops = script_spec__lookup(++ext);
if (!scripting_ops) {
fprintf(stderr, "invalid script extension");
return -1;
}
}
script_name = strdup(script);
return 0;
}
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_CALLBACK('s', "script", NULL, "name",
"script file name (lang:script name, script name, or *)",
parse_scriptname),
OPT_STRING('g', "gen-script", &generate_script_lang, "lang",
"generate perf-trace.xx script in specified language"),
OPT_END()
};
int cmd_trace(int argc, const char **argv, const char *prefix __used)
{
int err;
symbol__init(0);
setup_scripting();
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();
if (generate_script_lang) {
struct stat perf_stat;
int input = open(input_name, O_RDONLY);
if (input < 0) {
perror("failed to open file");
exit(-1);
}
err = fstat(input, &perf_stat);
if (err < 0) {
perror("failed to stat file");
exit(-1);
}
if (!perf_stat.st_size) {
fprintf(stderr, "zero-sized file, nothing to do!\n");
exit(0);
}
scripting_ops = script_spec__lookup(generate_script_lang);
if (!scripting_ops) {
fprintf(stderr, "invalid language specifier");
return -1;
}
perf_header__read(&session->header, input);
err = scripting_ops->generate_script("perf-trace");
goto out;
}
if (script_name) {
err = scripting_ops->start_script(script_name);
if (err)
goto out;
}
err = __cmd_trace();
cleanup_scripting();
out:
return err;
}