- 根目录:
- tools
- perf
- builtin-inject.c
/*
* builtin-inject.c
*
* Builtin inject command: Examine the live mode (stdin) event stream
* and repipe it to stdout while optionally injecting additional
* events into it.
*/
#include "builtin.h"
#include "perf.h"
#include "util/color.h"
#include "util/evlist.h"
#include "util/evsel.h"
#include "util/session.h"
#include "util/tool.h"
#include "util/debug.h"
#include "util/build-id.h"
#include "util/data.h"
#include "util/auxtrace.h"
#include "util/parse-options.h"
#include <linux/list.h>
struct perf_inject {
struct perf_tool tool;
struct perf_session *session;
bool build_ids;
bool sched_stat;
bool have_auxtrace;
bool strip;
const char *input_name;
struct perf_data_file output;
u64 bytes_written;
u64 aux_id;
struct list_head samples;
struct itrace_synth_opts itrace_synth_opts;
};
struct event_entry {
struct list_head node;
u32 tid;
union perf_event event[0];
};
static int output_bytes(struct perf_inject *inject, void *buf, size_t sz)
{
ssize_t size;
size = perf_data_file__write(&inject->output, buf, sz);
if (size < 0)
return -errno;
inject->bytes_written += size;
return 0;
}
static int perf_event__repipe_synth(struct perf_tool *tool,
union perf_event *event)
{
struct perf_inject *inject = container_of(tool, struct perf_inject,
tool);
return output_bytes(inject, event, event->header.size);
}
static int perf_event__repipe_oe_synth(struct perf_tool *tool,
union perf_event *event,
struct ordered_events *oe __maybe_unused)
{
return perf_event__repipe_synth(tool, event);
}
static int perf_event__repipe_op2_synth(struct perf_tool *tool,
union perf_event *event,
struct perf_session *session
__maybe_unused)
{
return perf_event__repipe_synth(tool, event);
}
static int perf_event__repipe_attr(struct perf_tool *tool,
union perf_event *event,
struct perf_evlist **pevlist)
{
struct perf_inject *inject = container_of(tool, struct perf_inject,
tool);
int ret;
ret = perf_event__process_attr(tool, event, pevlist);
if (ret)
return ret;
if (!inject->output.is_pipe)
return 0;
return perf_event__repipe_synth(tool, event);
}
#ifdef HAVE_AUXTRACE_SUPPORT
static int copy_bytes(struct perf_inject *inject, int fd, off_t size)
{
char buf[4096];
ssize_t ssz;
int ret;
while (size > 0) {
ssz = read(fd, buf, min(size, (off_t)sizeof(buf)));
if (ssz < 0)
return -errno;
ret = output_bytes(inject, buf, ssz);
if (ret)
return ret;
size -= ssz;
}
return 0;
}
static s64 perf_event__repipe_auxtrace(struct perf_tool *tool,
union perf_event *event,
struct perf_session *session
__maybe_unused)
{
struct perf_inject *inject = container_of(tool, struct perf_inject,
tool);
int ret;
inject->have_auxtrace = true;
if (!inject->output.is_pipe) {
off_t offset;
offset = lseek(inject->output.fd, 0, SEEK_CUR);
if (offset == -1)
return -errno;
ret = auxtrace_index__auxtrace_event(&session->auxtrace_index,
event, offset);
if (ret < 0)
return ret;
}
if (perf_data_file__is_pipe(session->file) || !session->one_mmap) {
ret = output_bytes(inject, event, event->header.size);
if (ret < 0)
return ret;
ret = copy_bytes(inject, perf_data_file__fd(session->file),
event->auxtrace.size);
} else {
ret = output_bytes(inject, event,
event->header.size + event->auxtrace.size);
}
if (ret < 0)
return ret;
return event->auxtrace.size;
}
#else
static s64
perf_event__repipe_auxtrace(struct perf_tool *tool __maybe_unused,
union perf_event *event __maybe_unused,
struct perf_session *session __maybe_unused)
{
pr_err("AUX area tracing not supported\n");
return -EINVAL;
}
#endif
static int perf_event__repipe(struct perf_tool *tool,
union perf_event *event,
struct perf_sample *sample __maybe_unused,
struct machine *machine __maybe_unused)
{
return perf_event__repipe_synth(tool, event);
}
static int perf_event__drop(struct perf_tool *tool __maybe_unused,
union perf_event *event __maybe_unused,
struct perf_sample *sample __maybe_unused,
struct machine *machine __maybe_unused)
{
return 0;
}
static int perf_event__drop_aux(struct perf_tool *tool,
union perf_event *event __maybe_unused,
struct perf_sample *sample,
struct machine *machine __maybe_unused)
{
struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
if (!inject->aux_id)
inject->aux_id = sample->id;
return 0;
}
typedef int (*inject_handler)(struct perf_tool *tool,
union perf_event *event,
struct perf_sample *sample,
struct perf_evsel *evsel,
struct machine *machine);
static int perf_event__repipe_sample(struct perf_tool *tool,
union perf_event *event,
struct perf_sample *sample,
struct perf_evsel *evsel,
struct machine *machine)
{
if (evsel->handler) {
inject_handler f = evsel->handler;
return f(tool, event, sample, evsel, machine);
}
build_id__mark_dso_hit(tool, event, sample, evsel, machine);
return perf_event__repipe_synth(tool, event);
}
static int perf_event__repipe_mmap(struct perf_tool *tool,
union perf_event *event,
struct perf_sample *sample,
struct machine *machine)
{
int err;
err = perf_event__process_mmap(tool, event, sample, machine);
perf_event__repipe(tool, event, sample, machine);
return err;
}
static int perf_event__repipe_mmap2(struct perf_tool *tool,
union perf_event *event,
struct perf_sample *sample,
struct machine *machine)
{
int err;
err = perf_event__process_mmap2(tool, event, sample, machine);
perf_event__repipe(tool, event, sample, machine);
return err;
}
static int perf_event__repipe_fork(struct perf_tool *tool,
union perf_event *event,
struct perf_sample *sample,
struct machine *machine)
{
int err;
err = perf_event__process_fork(tool, event, sample, machine);
perf_event__repipe(tool, event, sample, machine);
return err;
}
static int perf_event__repipe_comm(struct perf_tool *tool,
union perf_event *event,
struct perf_sample *sample,
struct machine *machine)
{
int err;
err = perf_event__process_comm(tool, event, sample, machine);
perf_event__repipe(tool, event, sample, machine);
return err;
}
static int perf_event__repipe_exit(struct perf_tool *tool,
union perf_event *event,
struct perf_sample *sample,
struct machine *machine)
{
int err;
err = perf_event__process_exit(tool, event, sample, machine);
perf_event__repipe(tool, event, sample, machine);
return err;
}
static int perf_event__repipe_tracing_data(struct perf_tool *tool,
union perf_event *event,
struct perf_session *session)
{
int err;
perf_event__repipe_synth(tool, event);
err = perf_event__process_tracing_data(tool, event, session);
return err;
}
static int perf_event__repipe_id_index(struct perf_tool *tool,
union perf_event *event,
struct perf_session *session)
{
int err;
perf_event__repipe_synth(tool, event);
err = perf_event__process_id_index(tool, event, session);
return err;
}
static int dso__read_build_id(struct dso *dso)
{
if (dso->has_build_id)
return 0;
if (filename__read_build_id(dso->long_name, dso->build_id,
sizeof(dso->build_id)) > 0) {
dso->has_build_id = true;
return 0;
}
return -1;
}
static int dso__inject_build_id(struct dso *dso, struct perf_tool *tool,
struct machine *machine)
{
u16 misc = PERF_RECORD_MISC_USER;
int err;
if (dso__read_build_id(dso) < 0) {
pr_debug("no build_id found for %s\n", dso->long_name);
return -1;
}
if (dso->kernel)
misc = PERF_RECORD_MISC_KERNEL;
err = perf_event__synthesize_build_id(tool, dso, misc, perf_event__repipe,
machine);
if (err) {
pr_err("Can't synthesize build_id event for %s\n", dso->long_name);
return -1;
}
return 0;
}
static int perf_event__inject_buildid(struct perf_tool *tool,
union perf_event *event,
struct perf_sample *sample,
struct perf_evsel *evsel __maybe_unused,
struct machine *machine)
{
struct addr_location al;
struct thread *thread;
u8 cpumode;
cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
thread = machine__findnew_thread(machine, sample->pid, sample->tid);
if (thread == NULL) {
pr_err("problem processing %d event, skipping it.\n",
event->header.type);
goto repipe;
}
thread__find_addr_map(thread, cpumode, MAP__FUNCTION, sample->ip, &al);
if (al.map != NULL) {
if (!al.map->dso->hit) {
al.map->dso->hit = 1;
if (map__load(al.map, NULL) >= 0) {
dso__inject_build_id(al.map->dso, tool, machine);
/*
* If this fails, too bad, let the other side
* account this as unresolved.
*/
} else {
#ifdef HAVE_LIBELF_SUPPORT
pr_warning("no symbols found in %s, maybe "
"install a debug package?\n",
al.map->dso->long_name);
#endif
}
}
}
thread__put(thread);
repipe:
perf_event__repipe(tool, event, sample, machine);
return 0;
}
static int perf_inject__sched_process_exit(struct perf_tool *tool,
union perf_event *event __maybe_unused,
struct perf_sample *sample,
struct perf_evsel *evsel __maybe_unused,
struct machine *machine __maybe_unused)
{
struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
struct event_entry *ent;
list_for_each_entry(ent, &inject->samples, node) {
if (sample->tid == ent->tid) {
list_del_init(&ent->node);
free(ent);
break;
}
}
return 0;
}
static int perf_inject__sched_switch(struct perf_tool *tool,
union perf_event *event,
struct perf_sample *sample,
struct perf_evsel *evsel,
struct machine *machine)
{
struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
struct event_entry *ent;
perf_inject__sched_process_exit(tool, event, sample, evsel, machine);
ent = malloc(event->header.size + sizeof(struct event_entry));
if (ent == NULL) {
color_fprintf(stderr, PERF_COLOR_RED,
"Not enough memory to process sched switch event!");
return -1;
}
ent->tid = sample->tid;
memcpy(&ent->event, event, event->header.size);
list_add(&ent->node, &inject->samples);
return 0;
}
static int perf_inject__sched_stat(struct perf_tool *tool,
union perf_event *event __maybe_unused,
struct perf_sample *sample,
struct perf_evsel *evsel,
struct machine *machine)
{
struct event_entry *ent;
union perf_event *event_sw;
struct perf_sample sample_sw;
struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
u32 pid = perf_evsel__intval(evsel, sample, "pid");
list_for_each_entry(ent, &inject->samples, node) {
if (pid == ent->tid)
goto found;
}
return 0;
found:
event_sw = &ent->event[0];
perf_evsel__parse_sample(evsel, event_sw, &sample_sw);
sample_sw.period = sample->period;
sample_sw.time = sample->time;
perf_event__synthesize_sample(event_sw, evsel->attr.sample_type,
evsel->attr.read_format, &sample_sw,
false);
build_id__mark_dso_hit(tool, event_sw, &sample_sw, evsel, machine);
return perf_event__repipe(tool, event_sw, &sample_sw, machine);
}
static void sig_handler(int sig __maybe_unused)
{
session_done = 1;
}
static int perf_evsel__check_stype(struct perf_evsel *evsel,
u64 sample_type, const char *sample_msg)
{
struct perf_event_attr *attr = &evsel->attr;
const char *name = perf_evsel__name(evsel);
if (!(attr->sample_type & sample_type)) {
pr_err("Samples for %s event do not have %s attribute set.",
name, sample_msg);
return -EINVAL;
}
return 0;
}
static int drop_sample(struct perf_tool *tool __maybe_unused,
union perf_event *event __maybe_unused,
struct perf_sample *sample __maybe_unused,
struct perf_evsel *evsel __maybe_unused,
struct machine *machine __maybe_unused)
{
return 0;
}
static void strip_init(struct perf_inject *inject)
{
struct perf_evlist *evlist = inject->session->evlist;
struct perf_evsel *evsel;
inject->tool.context_switch = perf_event__drop;
evlist__for_each(evlist, evsel)
evsel->handler = drop_sample;
}
static bool has_tracking(struct perf_evsel *evsel)
{
return evsel->attr.mmap || evsel->attr.mmap2 || evsel->attr.comm ||
evsel->attr.task;
}
#define COMPAT_MASK (PERF_SAMPLE_ID | PERF_SAMPLE_TID | PERF_SAMPLE_TIME | \
PERF_SAMPLE_ID | PERF_SAMPLE_CPU | PERF_SAMPLE_IDENTIFIER)
/*
* In order that the perf.data file is parsable, tracking events like MMAP need
* their selected event to exist, except if there is only 1 selected event left
* and it has a compatible sample type.
*/
static bool ok_to_remove(struct perf_evlist *evlist,
struct perf_evsel *evsel_to_remove)
{
struct perf_evsel *evsel;
int cnt = 0;
bool ok = false;
if (!has_tracking(evsel_to_remove))
return true;
evlist__for_each(evlist, evsel) {
if (evsel->handler != drop_sample) {
cnt += 1;
if ((evsel->attr.sample_type & COMPAT_MASK) ==
(evsel_to_remove->attr.sample_type & COMPAT_MASK))
ok = true;
}
}
return ok && cnt == 1;
}
static void strip_fini(struct perf_inject *inject)
{
struct perf_evlist *evlist = inject->session->evlist;
struct perf_evsel *evsel, *tmp;
/* Remove non-synthesized evsels if possible */
evlist__for_each_safe(evlist, tmp, evsel) {
if (evsel->handler == drop_sample &&
ok_to_remove(evlist, evsel)) {
pr_debug("Deleting %s\n", perf_evsel__name(evsel));
perf_evlist__remove(evlist, evsel);
perf_evsel__delete(evsel);
}
}
}
static int __cmd_inject(struct perf_inject *inject)
{
int ret = -EINVAL;
struct perf_session *session = inject->session;
struct perf_data_file *file_out = &inject->output;
int fd = perf_data_file__fd(file_out);
u64 output_data_offset;
signal(SIGINT, sig_handler);
if (inject->build_ids || inject->sched_stat ||
inject->itrace_synth_opts.set) {
inject->tool.mmap = perf_event__repipe_mmap;
inject->tool.mmap2 = perf_event__repipe_mmap2;
inject->tool.fork = perf_event__repipe_fork;
inject->tool.tracing_data = perf_event__repipe_tracing_data;
}
output_data_offset = session->header.data_offset;
if (inject->build_ids) {
inject->tool.sample = perf_event__inject_buildid;
} else if (inject->sched_stat) {
struct perf_evsel *evsel;
evlist__for_each(session->evlist, evsel) {
const char *name = perf_evsel__name(evsel);
if (!strcmp(name, "sched:sched_switch")) {
if (perf_evsel__check_stype(evsel, PERF_SAMPLE_TID, "TID"))
return -EINVAL;
evsel->handler = perf_inject__sched_switch;
} else if (!strcmp(name, "sched:sched_process_exit"))
evsel->handler = perf_inject__sched_process_exit;
else if (!strncmp(name, "sched:sched_stat_", 17))
evsel->handler = perf_inject__sched_stat;
}
} else if (inject->itrace_synth_opts.set) {
session->itrace_synth_opts = &inject->itrace_synth_opts;
inject->itrace_synth_opts.inject = true;
inject->tool.comm = perf_event__repipe_comm;
inject->tool.exit = perf_event__repipe_exit;
inject->tool.id_index = perf_event__repipe_id_index;
inject->tool.auxtrace_info = perf_event__process_auxtrace_info;
inject->tool.auxtrace = perf_event__process_auxtrace;
inject->tool.aux = perf_event__drop_aux;
inject->tool.itrace_start = perf_event__drop_aux,
inject->tool.ordered_events = true;
inject->tool.ordering_requires_timestamps = true;
/* Allow space in the header for new attributes */
output_data_offset = 4096;
if (inject->strip)
strip_init(inject);
}
if (!inject->itrace_synth_opts.set)
auxtrace_index__free(&session->auxtrace_index);
if (!file_out->is_pipe)
lseek(fd, output_data_offset, SEEK_SET);
ret = perf_session__process_events(session);
if (!file_out->is_pipe) {
if (inject->build_ids) {
perf_header__set_feat(&session->header,
HEADER_BUILD_ID);
if (inject->have_auxtrace)
dsos__hit_all(session);
}
/*
* The AUX areas have been removed and replaced with
* synthesized hardware events, so clear the feature flag and
* remove the evsel.
*/
if (inject->itrace_synth_opts.set) {
struct perf_evsel *evsel;
perf_header__clear_feat(&session->header,
HEADER_AUXTRACE);
if (inject->itrace_synth_opts.last_branch)
perf_header__set_feat(&session->header,
HEADER_BRANCH_STACK);
evsel = perf_evlist__id2evsel_strict(session->evlist,
inject->aux_id);
if (evsel) {
pr_debug("Deleting %s\n",
perf_evsel__name(evsel));
perf_evlist__remove(session->evlist, evsel);
perf_evsel__delete(evsel);
}
if (inject->strip)
strip_fini(inject);
}
session->header.data_offset = output_data_offset;
session->header.data_size = inject->bytes_written;
perf_session__write_header(session, session->evlist, fd, true);
}
return ret;
}
int cmd_inject(int argc, const char **argv, const char *prefix __maybe_unused)
{
struct perf_inject inject = {
.tool = {
.sample = perf_event__repipe_sample,
.mmap = perf_event__repipe,
.mmap2 = perf_event__repipe,
.comm = perf_event__repipe,
.fork = perf_event__repipe,
.exit = perf_event__repipe,
.lost = perf_event__repipe,
.lost_samples = perf_event__repipe,
.aux = perf_event__repipe,
.itrace_start = perf_event__repipe,
.context_switch = perf_event__repipe,
.read = perf_event__repipe_sample,
.throttle = perf_event__repipe,
.unthrottle = perf_event__repipe,
.attr = perf_event__repipe_attr,
.tracing_data = perf_event__repipe_op2_synth,
.auxtrace_info = perf_event__repipe_op2_synth,
.auxtrace = perf_event__repipe_auxtrace,
.auxtrace_error = perf_event__repipe_op2_synth,
.finished_round = perf_event__repipe_oe_synth,
.build_id = perf_event__repipe_op2_synth,
.id_index = perf_event__repipe_op2_synth,
},
.input_name = "-",
.samples = LIST_HEAD_INIT(inject.samples),
.output = {
.path = "-",
.mode = PERF_DATA_MODE_WRITE,
},
};
struct perf_data_file file = {
.mode = PERF_DATA_MODE_READ,
};
int ret;
const struct option options[] = {
OPT_BOOLEAN('b', "build-ids", &inject.build_ids,
"Inject build-ids into the output stream"),
OPT_STRING('i', "input", &inject.input_name, "file",
"input file name"),
OPT_STRING('o', "output", &inject.output.path, "file",
"output file name"),
OPT_BOOLEAN('s', "sched-stat", &inject.sched_stat,
"Merge sched-stat and sched-switch for getting events "
"where and how long tasks slept"),
OPT_INCR('v', "verbose", &verbose,
"be more verbose (show build ids, etc)"),
OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name, "file",
"kallsyms pathname"),
OPT_BOOLEAN('f', "force", &file.force, "don't complain, do it"),
OPT_CALLBACK_OPTARG(0, "itrace", &inject.itrace_synth_opts,
NULL, "opts", "Instruction Tracing options",
itrace_parse_synth_opts),
OPT_BOOLEAN(0, "strip", &inject.strip,
"strip non-synthesized events (use with --itrace)"),
OPT_END()
};
const char * const inject_usage[] = {
"perf inject [<options>]",
NULL
};
argc = parse_options(argc, argv, options, inject_usage, 0);
/*
* Any (unrecognized) arguments left?
*/
if (argc)
usage_with_options(inject_usage, options);
if (inject.strip && !inject.itrace_synth_opts.set) {
pr_err("--strip option requires --itrace option\n");
return -1;
}
if (perf_data_file__open(&inject.output)) {
perror("failed to create output file");
return -1;
}
inject.tool.ordered_events = inject.sched_stat;
file.path = inject.input_name;
inject.session = perf_session__new(&file, true, &inject.tool);
if (inject.session == NULL)
return -1;
ret = symbol__init(&inject.session->header.env);
if (ret < 0)
goto out_delete;
ret = __cmd_inject(&inject);
out_delete:
perf_session__delete(inject.session);
return ret;
}