linux/tools/perf/builtin-inject.c
Minghao Chi f0ac5b8581 perf tools: Remove redundant err variable
Return value from perf_event__process_tracing_data() directly instead
of taking this in another redundant variable.

Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: Minghao Chi <chi.minghao@zte.com.cn>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lore.kernel.org/lkml/20220112080109.666800-1-chi.minghao@zte.com.cn
Signed-off-by: CGEL ZTE <cgel.zte@gmail.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2022-01-22 17:25:02 -03:00

1087 lines
29 KiB
C

// SPDX-License-Identifier: GPL-2.0
/*
* 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 "util/color.h"
#include "util/dso.h"
#include "util/vdso.h"
#include "util/evlist.h"
#include "util/evsel.h"
#include "util/map.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/jit.h"
#include "util/symbol.h"
#include "util/synthetic-events.h"
#include "util/thread.h"
#include "util/namespaces.h"
#include <linux/err.h>
#include <subcmd/parse-options.h>
#include <uapi/linux/mman.h> /* To get things like MAP_HUGETLB even on older libc headers */
#include <linux/list.h>
#include <linux/string.h>
#include <errno.h>
#include <signal.h>
struct perf_inject {
struct perf_tool tool;
struct perf_session *session;
bool build_ids;
bool build_id_all;
bool sched_stat;
bool have_auxtrace;
bool strip;
bool jit_mode;
bool in_place_update;
bool in_place_update_dry_run;
bool is_pipe;
const char *input_name;
struct perf_data output;
u64 bytes_written;
u64 aux_id;
struct list_head samples;
struct itrace_synth_opts itrace_synth_opts;
char event_copy[PERF_SAMPLE_MAX_SIZE];
};
struct event_entry {
struct list_head node;
u32 tid;
union perf_event event[];
};
static int dso__inject_build_id(struct dso *dso, struct perf_tool *tool,
struct machine *machine, u8 cpumode, u32 flags);
static int output_bytes(struct perf_inject *inject, void *buf, size_t sz)
{
ssize_t size;
size = perf_data__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);
}
#ifdef HAVE_JITDUMP
static int perf_event__drop_oe(struct perf_tool *tool __maybe_unused,
union perf_event *event __maybe_unused,
struct ordered_events *oe __maybe_unused)
{
return 0;
}
#endif
static int perf_event__repipe_op2_synth(struct perf_session *session,
union perf_event *event)
{
return perf_event__repipe_synth(session->tool, event);
}
static int perf_event__repipe_op4_synth(struct perf_session *session,
union perf_event *event,
u64 data __maybe_unused)
{
return perf_event__repipe_synth(session->tool, event);
}
static int perf_event__repipe_attr(struct perf_tool *tool,
union perf_event *event,
struct 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->is_pipe)
return 0;
return perf_event__repipe_synth(tool, event);
}
static int perf_event__repipe_event_update(struct perf_tool *tool,
union perf_event *event,
struct evlist **pevlist __maybe_unused)
{
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_session *session,
union perf_event *event)
{
struct perf_tool *tool = session->tool;
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.file.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__is_pipe(session->data) || !session->one_mmap) {
ret = output_bytes(inject, event, event->header.size);
if (ret < 0)
return ret;
ret = copy_bytes(inject, perf_data__fd(session->data),
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_session *session __maybe_unused,
union perf_event *event __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;
}
static union perf_event *
perf_inject__cut_auxtrace_sample(struct perf_inject *inject,
union perf_event *event,
struct perf_sample *sample)
{
size_t sz1 = sample->aux_sample.data - (void *)event;
size_t sz2 = event->header.size - sample->aux_sample.size - sz1;
union perf_event *ev = (union perf_event *)inject->event_copy;
if (sz1 > event->header.size || sz2 > event->header.size ||
sz1 + sz2 > event->header.size ||
sz1 < sizeof(struct perf_event_header) + sizeof(u64))
return event;
memcpy(ev, event, sz1);
memcpy((void *)ev + sz1, (void *)event + event->header.size - sz2, sz2);
ev->header.size = sz1 + sz2;
((u64 *)((void *)ev + sz1))[-1] = 0;
return ev;
}
typedef int (*inject_handler)(struct perf_tool *tool,
union perf_event *event,
struct perf_sample *sample,
struct evsel *evsel,
struct machine *machine);
static int perf_event__repipe_sample(struct perf_tool *tool,
union perf_event *event,
struct perf_sample *sample,
struct evsel *evsel,
struct machine *machine)
{
struct perf_inject *inject = container_of(tool, struct perf_inject,
tool);
if (evsel && evsel->handler) {
inject_handler f = evsel->handler;
return f(tool, event, sample, evsel, machine);
}
build_id__mark_dso_hit(tool, event, sample, evsel, machine);
if (inject->itrace_synth_opts.set && sample->aux_sample.size)
event = perf_inject__cut_auxtrace_sample(inject, event, sample);
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;
}
#ifdef HAVE_JITDUMP
static int perf_event__jit_repipe_mmap(struct perf_tool *tool,
union perf_event *event,
struct perf_sample *sample,
struct machine *machine)
{
struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
u64 n = 0;
int ret;
/*
* if jit marker, then inject jit mmaps and generate ELF images
*/
ret = jit_process(inject->session, &inject->output, machine,
event->mmap.filename, event->mmap.pid, event->mmap.tid, &n);
if (ret < 0)
return ret;
if (ret) {
inject->bytes_written += n;
return 0;
}
return perf_event__repipe_mmap(tool, event, sample, machine);
}
#endif
static struct dso *findnew_dso(int pid, int tid, const char *filename,
struct dso_id *id, struct machine *machine)
{
struct thread *thread;
struct nsinfo *nsi = NULL;
struct nsinfo *nnsi;
struct dso *dso;
bool vdso;
thread = machine__findnew_thread(machine, pid, tid);
if (thread == NULL) {
pr_err("cannot find or create a task %d/%d.\n", tid, pid);
return NULL;
}
vdso = is_vdso_map(filename);
nsi = nsinfo__get(thread->nsinfo);
if (vdso) {
/* The vdso maps are always on the host and not the
* container. Ensure that we don't use setns to look
* them up.
*/
nnsi = nsinfo__copy(nsi);
if (nnsi) {
nsinfo__put(nsi);
nnsi->need_setns = false;
nsi = nnsi;
}
dso = machine__findnew_vdso(machine, thread);
} else {
dso = machine__findnew_dso_id(machine, filename, id);
}
if (dso) {
nsinfo__put(dso->nsinfo);
dso->nsinfo = nsi;
} else
nsinfo__put(nsi);
thread__put(thread);
return dso;
}
static int perf_event__repipe_buildid_mmap(struct perf_tool *tool,
union perf_event *event,
struct perf_sample *sample,
struct machine *machine)
{
struct dso *dso;
dso = findnew_dso(event->mmap.pid, event->mmap.tid,
event->mmap.filename, NULL, machine);
if (dso && !dso->hit) {
dso->hit = 1;
dso__inject_build_id(dso, tool, machine, sample->cpumode, 0);
}
dso__put(dso);
return perf_event__repipe(tool, event, sample, machine);
}
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);
if (event->header.misc & PERF_RECORD_MISC_MMAP_BUILD_ID) {
struct dso *dso;
dso = findnew_dso(event->mmap2.pid, event->mmap2.tid,
event->mmap2.filename, NULL, machine);
if (dso) {
/* mark it not to inject build-id */
dso->hit = 1;
}
dso__put(dso);
}
return err;
}
#ifdef HAVE_JITDUMP
static int perf_event__jit_repipe_mmap2(struct perf_tool *tool,
union perf_event *event,
struct perf_sample *sample,
struct machine *machine)
{
struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
u64 n = 0;
int ret;
/*
* if jit marker, then inject jit mmaps and generate ELF images
*/
ret = jit_process(inject->session, &inject->output, machine,
event->mmap2.filename, event->mmap2.pid, event->mmap2.tid, &n);
if (ret < 0)
return ret;
if (ret) {
inject->bytes_written += n;
return 0;
}
return perf_event__repipe_mmap2(tool, event, sample, machine);
}
#endif
static int perf_event__repipe_buildid_mmap2(struct perf_tool *tool,
union perf_event *event,
struct perf_sample *sample,
struct machine *machine)
{
struct dso_id dso_id = {
.maj = event->mmap2.maj,
.min = event->mmap2.min,
.ino = event->mmap2.ino,
.ino_generation = event->mmap2.ino_generation,
};
struct dso *dso;
if (event->header.misc & PERF_RECORD_MISC_MMAP_BUILD_ID) {
/* cannot use dso_id since it'd have invalid info */
dso = findnew_dso(event->mmap2.pid, event->mmap2.tid,
event->mmap2.filename, NULL, machine);
if (dso) {
/* mark it not to inject build-id */
dso->hit = 1;
}
dso__put(dso);
return 0;
}
dso = findnew_dso(event->mmap2.pid, event->mmap2.tid,
event->mmap2.filename, &dso_id, machine);
if (dso && !dso->hit) {
dso->hit = 1;
dso__inject_build_id(dso, tool, machine, sample->cpumode,
event->mmap2.flags);
}
dso__put(dso);
perf_event__repipe(tool, event, sample, machine);
return 0;
}
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_namespaces(struct perf_tool *tool,
union perf_event *event,
struct perf_sample *sample,
struct machine *machine)
{
int err = perf_event__process_namespaces(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_session *session,
union perf_event *event)
{
perf_event__repipe_synth(session->tool, event);
return perf_event__process_tracing_data(session, event);
}
static int dso__read_build_id(struct dso *dso)
{
struct nscookie nsc;
if (dso->has_build_id)
return 0;
nsinfo__mountns_enter(dso->nsinfo, &nsc);
if (filename__read_build_id(dso->long_name, &dso->bid) > 0)
dso->has_build_id = true;
nsinfo__mountns_exit(&nsc);
return dso->has_build_id ? 0 : -1;
}
static int dso__inject_build_id(struct dso *dso, struct perf_tool *tool,
struct machine *machine, u8 cpumode, u32 flags)
{
int err;
if (is_anon_memory(dso->long_name) || flags & MAP_HUGETLB)
return 0;
if (is_no_dso_memory(dso->long_name))
return 0;
if (dso__read_build_id(dso) < 0) {
pr_debug("no build_id found for %s\n", dso->long_name);
return -1;
}
err = perf_event__synthesize_build_id(tool, dso, cpumode,
perf_event__repipe, machine);
if (err) {
pr_err("Can't synthesize build_id event for %s\n", dso->long_name);
return -1;
}
return 0;
}
int perf_event__inject_buildid(struct perf_tool *tool, union perf_event *event,
struct perf_sample *sample,
struct evsel *evsel __maybe_unused,
struct machine *machine)
{
struct addr_location al;
struct thread *thread;
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;
}
if (thread__find_map(thread, sample->cpumode, sample->ip, &al)) {
if (!al.map->dso->hit) {
al.map->dso->hit = 1;
dso__inject_build_id(al.map->dso, tool, machine,
sample->cpumode, al.map->flags);
}
}
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 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 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 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 = 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];
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->core.attr.sample_type,
evsel->core.attr.read_format, &sample_sw);
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 evsel__check_stype(struct evsel *evsel, u64 sample_type, const char *sample_msg)
{
struct perf_event_attr *attr = &evsel->core.attr;
const char *name = 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 evsel *evsel __maybe_unused,
struct machine *machine __maybe_unused)
{
return 0;
}
static void strip_init(struct perf_inject *inject)
{
struct evlist *evlist = inject->session->evlist;
struct evsel *evsel;
inject->tool.context_switch = perf_event__drop;
evlist__for_each_entry(evlist, evsel)
evsel->handler = drop_sample;
}
static int parse_vm_time_correlation(const struct option *opt, const char *str, int unset)
{
struct perf_inject *inject = opt->value;
const char *args;
char *dry_run;
if (unset)
return 0;
inject->itrace_synth_opts.set = true;
inject->itrace_synth_opts.vm_time_correlation = true;
inject->in_place_update = true;
if (!str)
return 0;
dry_run = skip_spaces(str);
if (!strncmp(dry_run, "dry-run", strlen("dry-run"))) {
inject->itrace_synth_opts.vm_tm_corr_dry_run = true;
inject->in_place_update_dry_run = true;
args = dry_run + strlen("dry-run");
} else {
args = str;
}
inject->itrace_synth_opts.vm_tm_corr_args = strdup(args);
return inject->itrace_synth_opts.vm_tm_corr_args ? 0 : -ENOMEM;
}
static int output_fd(struct perf_inject *inject)
{
return inject->in_place_update ? -1 : perf_data__fd(&inject->output);
}
static int __cmd_inject(struct perf_inject *inject)
{
int ret = -EINVAL;
struct perf_session *session = inject->session;
int fd = output_fd(inject);
u64 output_data_offset;
signal(SIGINT, sig_handler);
if (inject->build_ids || inject->sched_stat ||
inject->itrace_synth_opts.set || inject->build_id_all) {
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_id_all) {
inject->tool.mmap = perf_event__repipe_buildid_mmap;
inject->tool.mmap2 = perf_event__repipe_buildid_mmap2;
} else if (inject->build_ids) {
inject->tool.sample = perf_event__inject_buildid;
} else if (inject->sched_stat) {
struct evsel *evsel;
evlist__for_each_entry(session->evlist, evsel) {
const char *name = evsel__name(evsel);
if (!strcmp(name, "sched:sched_switch")) {
if (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.vm_time_correlation) {
session->itrace_synth_opts = &inject->itrace_synth_opts;
memset(&inject->tool, 0, sizeof(inject->tool));
inject->tool.id_index = perf_event__process_id_index;
inject->tool.auxtrace_info = perf_event__process_auxtrace_info;
inject->tool.auxtrace = perf_event__process_auxtrace;
inject->tool.auxtrace_error = perf_event__process_auxtrace_error;
inject->tool.ordered_events = true;
inject->tool.ordering_requires_timestamps = true;
} 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.namespaces = perf_event__repipe_namespaces;
inject->tool.exit = perf_event__repipe_exit;
inject->tool.id_index = perf_event__process_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.aux_output_hw_id = 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 = roundup(8192 + session->header.data_offset, 4096);
if (inject->strip)
strip_init(inject);
}
if (!inject->itrace_synth_opts.set)
auxtrace_index__free(&session->auxtrace_index);
if (!inject->is_pipe && !inject->in_place_update)
lseek(fd, output_data_offset, SEEK_SET);
ret = perf_session__process_events(session);
if (ret)
return ret;
if (!inject->is_pipe && !inject->in_place_update) {
if (inject->build_ids)
perf_header__set_feat(&session->header,
HEADER_BUILD_ID);
/*
* Keep all buildids when there is unprocessed AUX data because
* it is not known which ones the AUX trace hits.
*/
if (perf_header__has_feat(&session->header, HEADER_BUILD_ID) &&
inject->have_auxtrace && !inject->itrace_synth_opts.set)
dsos__hit_all(session);
/*
* The AUX areas have been removed and replaced with
* synthesized hardware events, so clear the feature flag.
*/
if (inject->itrace_synth_opts.set) {
perf_header__clear_feat(&session->header,
HEADER_AUXTRACE);
if (inject->itrace_synth_opts.last_branch ||
inject->itrace_synth_opts.add_last_branch)
perf_header__set_feat(&session->header,
HEADER_BRANCH_STACK);
}
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)
{
struct perf_inject inject = {
.tool = {
.sample = perf_event__repipe_sample,
.read = perf_event__repipe_sample,
.mmap = perf_event__repipe,
.mmap2 = perf_event__repipe,
.comm = perf_event__repipe,
.namespaces = perf_event__repipe,
.cgroup = 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,
.aux_output_hw_id = perf_event__repipe,
.context_switch = perf_event__repipe,
.throttle = perf_event__repipe,
.unthrottle = perf_event__repipe,
.ksymbol = perf_event__repipe,
.bpf = perf_event__repipe,
.text_poke = perf_event__repipe,
.attr = perf_event__repipe_attr,
.event_update = perf_event__repipe_event_update,
.tracing_data = 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,
.auxtrace_info = perf_event__repipe_op2_synth,
.auxtrace_error = perf_event__repipe_op2_synth,
.time_conv = perf_event__repipe_op2_synth,
.thread_map = perf_event__repipe_op2_synth,
.cpu_map = perf_event__repipe_op2_synth,
.stat_config = perf_event__repipe_op2_synth,
.stat = perf_event__repipe_op2_synth,
.stat_round = perf_event__repipe_op2_synth,
.feature = perf_event__repipe_op2_synth,
.compressed = perf_event__repipe_op4_synth,
.auxtrace = perf_event__repipe_auxtrace,
},
.input_name = "-",
.samples = LIST_HEAD_INIT(inject.samples),
.output = {
.path = "-",
.mode = PERF_DATA_MODE_WRITE,
.use_stdio = true,
},
};
struct perf_data data = {
.mode = PERF_DATA_MODE_READ,
.use_stdio = true,
};
int ret;
bool repipe = true;
struct option options[] = {
OPT_BOOLEAN('b', "build-ids", &inject.build_ids,
"Inject build-ids into the output stream"),
OPT_BOOLEAN(0, "buildid-all", &inject.build_id_all,
"Inject build-ids of all DSOs 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"),
#ifdef HAVE_JITDUMP
OPT_BOOLEAN('j', "jit", &inject.jit_mode, "merge jitdump files into perf.data file"),
#endif
OPT_INCR('v', "verbose", &verbose,
"be more verbose (show build ids, etc)"),
OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
"file", "vmlinux pathname"),
OPT_BOOLEAN(0, "ignore-vmlinux", &symbol_conf.ignore_vmlinux,
"don't load vmlinux even if found"),
OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name, "file",
"kallsyms pathname"),
OPT_BOOLEAN('f', "force", &data.force, "don't complain, do it"),
OPT_CALLBACK_OPTARG(0, "itrace", &inject.itrace_synth_opts,
NULL, "opts", "Instruction Tracing options\n"
ITRACE_HELP,
itrace_parse_synth_opts),
OPT_BOOLEAN(0, "strip", &inject.strip,
"strip non-synthesized events (use with --itrace)"),
OPT_CALLBACK_OPTARG(0, "vm-time-correlation", &inject, NULL, "opts",
"correlate time between VM guests and the host",
parse_vm_time_correlation),
OPT_END()
};
const char * const inject_usage[] = {
"perf inject [<options>]",
NULL
};
#ifndef HAVE_JITDUMP
set_option_nobuild(options, 'j', "jit", "NO_LIBELF=1", true);
#endif
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 (symbol__validate_sym_arguments())
return -1;
if (inject.in_place_update) {
if (!strcmp(inject.input_name, "-")) {
pr_err("Input file name required for in-place updating\n");
return -1;
}
if (strcmp(inject.output.path, "-")) {
pr_err("Output file name must not be specified for in-place updating\n");
return -1;
}
if (!data.force && !inject.in_place_update_dry_run) {
pr_err("The input file would be updated in place, "
"the --force option is required.\n");
return -1;
}
if (!inject.in_place_update_dry_run)
data.in_place_update = true;
} else if (perf_data__open(&inject.output)) {
perror("failed to create output file");
return -1;
}
data.path = inject.input_name;
if (!strcmp(inject.input_name, "-") || inject.output.is_pipe) {
inject.is_pipe = true;
/*
* Do not repipe header when input is a regular file
* since either it can rewrite the header at the end
* or write a new pipe header.
*/
if (strcmp(inject.input_name, "-"))
repipe = false;
}
inject.session = __perf_session__new(&data, repipe,
output_fd(&inject),
&inject.tool);
if (IS_ERR(inject.session)) {
ret = PTR_ERR(inject.session);
goto out_close_output;
}
if (zstd_init(&(inject.session->zstd_data), 0) < 0)
pr_warning("Decompression initialization failed.\n");
if (!data.is_pipe && inject.output.is_pipe) {
ret = perf_header__write_pipe(perf_data__fd(&inject.output));
if (ret < 0) {
pr_err("Couldn't write a new pipe header.\n");
goto out_delete;
}
ret = perf_event__synthesize_for_pipe(&inject.tool,
inject.session,
&inject.output,
perf_event__repipe);
if (ret < 0)
goto out_delete;
}
if (inject.build_ids && !inject.build_id_all) {
/*
* to make sure the mmap records are ordered correctly
* and so that the correct especially due to jitted code
* mmaps. We cannot generate the buildid hit list and
* inject the jit mmaps at the same time for now.
*/
inject.tool.ordered_events = true;
inject.tool.ordering_requires_timestamps = true;
}
if (inject.sched_stat) {
inject.tool.ordered_events = true;
}
#ifdef HAVE_JITDUMP
if (inject.jit_mode) {
inject.tool.mmap2 = perf_event__jit_repipe_mmap2;
inject.tool.mmap = perf_event__jit_repipe_mmap;
inject.tool.ordered_events = true;
inject.tool.ordering_requires_timestamps = true;
/*
* JIT MMAP injection injects all MMAP events in one go, so it
* does not obey finished_round semantics.
*/
inject.tool.finished_round = perf_event__drop_oe;
}
#endif
ret = symbol__init(&inject.session->header.env);
if (ret < 0)
goto out_delete;
ret = __cmd_inject(&inject);
out_delete:
zstd_fini(&(inject.session->zstd_data));
perf_session__delete(inject.session);
out_close_output:
if (!inject.in_place_update)
perf_data__close(&inject.output);
free(inject.itrace_synth_opts.vm_tm_corr_args);
return ret;
}