1 files changed, 876 insertions, 0 deletions

diff --git a/tools/perf/builtin-inject.c b/tools/perf/builtin-inject.c
new file mode 100644
index 000000000..a3b346359
--- /dev/null
+++ b/tools/perf/builtin-inject.c
@@ -0,0 +1,876 @@
+// 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 "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/jit.h"
+#include "util/thread.h"
+
+#include <subcmd/parse-options.h>
+
+#include <linux/list.h>
+#include <errno.h>
+#include <signal.h>
+
+struct perf_inject {
+	struct perf_tool	tool;
+	struct perf_session	*session;
+	bool			build_ids;
+	bool			sched_stat;
+	bool			have_auxtrace;
+	bool			strip;
+	bool			jit_mode;
+	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;
+};
+
+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__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_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)
+{
+	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_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;
+}
+
+#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, sample->pid, &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 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;
+}
+
+#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, sample->pid, &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_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_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;
+
+	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;
+			if (map__load(al.map) >= 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);
+	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_entry(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_entry(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_entry_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 *data_out = &inject->output;
+	int fd = perf_data__fd(data_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_entry(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.namespaces	    = perf_event__repipe_namespaces;
+		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 (!data_out->is_pipe)
+		lseek(fd, output_data_offset, SEEK_SET);
+
+	ret = perf_session__process_events(session);
+	if (ret)
+		return ret;
+
+	if (!data_out->is_pipe) {
+		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 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)
+{
+	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,
+			.time_conv	= 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,
+			.feature	= perf_event__repipe_op2_synth,
+		},
+		.input_name  = "-",
+		.samples = LIST_HEAD_INIT(inject.samples),
+		.output = {
+			.file      = {
+				.path = "-",
+			},
+			.mode      = PERF_DATA_MODE_WRITE,
+		},
+	};
+	struct perf_data data = {
+		.mode = PERF_DATA_MODE_READ,
+	};
+	int ret;
+
+	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.file.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(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",
+				    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
+	};
+#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 (perf_data__open(&inject.output)) {
+		perror("failed to create output file");
+		return -1;
+	}
+
+	inject.tool.ordered_events = inject.sched_stat;
+
+	data.file.path = inject.input_name;
+	inject.session = perf_session__new(&data, true, &inject.tool);
+	if (inject.session == NULL)
+		return -1;
+
+	if (inject.build_ids) {
+		/*
+		 * 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;
+	}
+#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:
+	perf_session__delete(inject.session);
+	return ret;
+}