Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 4243 insertions, 0 deletions

diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
new file mode 100644
index 000000000..34bb31f08
--- /dev/null
+++ b/tools/perf/builtin-record.c
@@ -0,0 +1,4243 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * builtin-record.c
+ *
+ * Builtin record command: Record the profile of a workload
+ * (or a CPU, or a PID) into the perf.data output file - for
+ * later analysis via perf report.
+ */
+#include "builtin.h"
+
+#include "util/build-id.h"
+#include <subcmd/parse-options.h>
+#include <internal/xyarray.h>
+#include "util/parse-events.h"
+#include "util/config.h"
+
+#include "util/callchain.h"
+#include "util/cgroup.h"
+#include "util/header.h"
+#include "util/event.h"
+#include "util/evlist.h"
+#include "util/evsel.h"
+#include "util/debug.h"
+#include "util/mmap.h"
+#include "util/mutex.h"
+#include "util/target.h"
+#include "util/session.h"
+#include "util/tool.h"
+#include "util/symbol.h"
+#include "util/record.h"
+#include "util/cpumap.h"
+#include "util/thread_map.h"
+#include "util/data.h"
+#include "util/perf_regs.h"
+#include "util/auxtrace.h"
+#include "util/tsc.h"
+#include "util/parse-branch-options.h"
+#include "util/parse-regs-options.h"
+#include "util/perf_api_probe.h"
+#include "util/trigger.h"
+#include "util/perf-hooks.h"
+#include "util/cpu-set-sched.h"
+#include "util/synthetic-events.h"
+#include "util/time-utils.h"
+#include "util/units.h"
+#include "util/bpf-event.h"
+#include "util/util.h"
+#include "util/pfm.h"
+#include "util/pmu.h"
+#include "util/pmus.h"
+#include "util/clockid.h"
+#include "util/off_cpu.h"
+#include "util/bpf-filter.h"
+#include "asm/bug.h"
+#include "perf.h"
+#include "cputopo.h"
+
+#include <errno.h>
+#include <inttypes.h>
+#include <locale.h>
+#include <poll.h>
+#include <pthread.h>
+#include <unistd.h>
+#ifndef HAVE_GETTID
+#include <syscall.h>
+#endif
+#include <sched.h>
+#include <signal.h>
+#ifdef HAVE_EVENTFD_SUPPORT
+#include <sys/eventfd.h>
+#endif
+#include <sys/mman.h>
+#include <sys/wait.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <linux/err.h>
+#include <linux/string.h>
+#include <linux/time64.h>
+#include <linux/zalloc.h>
+#include <linux/bitmap.h>
+#include <sys/time.h>
+
+struct switch_output {
+	bool		 enabled;
+	bool		 signal;
+	unsigned long	 size;
+	unsigned long	 time;
+	const char	*str;
+	bool		 set;
+	char		 **filenames;
+	int		 num_files;
+	int		 cur_file;
+};
+
+struct thread_mask {
+	struct mmap_cpu_mask	maps;
+	struct mmap_cpu_mask	affinity;
+};
+
+struct record_thread {
+	pid_t			tid;
+	struct thread_mask	*mask;
+	struct {
+		int		msg[2];
+		int		ack[2];
+	} pipes;
+	struct fdarray		pollfd;
+	int			ctlfd_pos;
+	int			nr_mmaps;
+	struct mmap		**maps;
+	struct mmap		**overwrite_maps;
+	struct record		*rec;
+	unsigned long long	samples;
+	unsigned long		waking;
+	u64			bytes_written;
+	u64			bytes_transferred;
+	u64			bytes_compressed;
+};
+
+static __thread struct record_thread *thread;
+
+enum thread_msg {
+	THREAD_MSG__UNDEFINED = 0,
+	THREAD_MSG__READY,
+	THREAD_MSG__MAX,
+};
+
+static const char *thread_msg_tags[THREAD_MSG__MAX] = {
+	"UNDEFINED", "READY"
+};
+
+enum thread_spec {
+	THREAD_SPEC__UNDEFINED = 0,
+	THREAD_SPEC__CPU,
+	THREAD_SPEC__CORE,
+	THREAD_SPEC__PACKAGE,
+	THREAD_SPEC__NUMA,
+	THREAD_SPEC__USER,
+	THREAD_SPEC__MAX,
+};
+
+static const char *thread_spec_tags[THREAD_SPEC__MAX] = {
+	"undefined", "cpu", "core", "package", "numa", "user"
+};
+
+struct pollfd_index_map {
+	int evlist_pollfd_index;
+	int thread_pollfd_index;
+};
+
+struct record {
+	struct perf_tool	tool;
+	struct record_opts	opts;
+	u64			bytes_written;
+	u64			thread_bytes_written;
+	struct perf_data	data;
+	struct auxtrace_record	*itr;
+	struct evlist	*evlist;
+	struct perf_session	*session;
+	struct evlist		*sb_evlist;
+	pthread_t		thread_id;
+	int			realtime_prio;
+	bool			switch_output_event_set;
+	bool			no_buildid;
+	bool			no_buildid_set;
+	bool			no_buildid_cache;
+	bool			no_buildid_cache_set;
+	bool			buildid_all;
+	bool			buildid_mmap;
+	bool			timestamp_filename;
+	bool			timestamp_boundary;
+	bool			off_cpu;
+	struct switch_output	switch_output;
+	unsigned long long	samples;
+	unsigned long		output_max_size;	/* = 0: unlimited */
+	struct perf_debuginfod	debuginfod;
+	int			nr_threads;
+	struct thread_mask	*thread_masks;
+	struct record_thread	*thread_data;
+	struct pollfd_index_map	*index_map;
+	size_t			index_map_sz;
+	size_t			index_map_cnt;
+};
+
+static volatile int done;
+
+static volatile int auxtrace_record__snapshot_started;
+static DEFINE_TRIGGER(auxtrace_snapshot_trigger);
+static DEFINE_TRIGGER(switch_output_trigger);
+
+static const char *affinity_tags[PERF_AFFINITY_MAX] = {
+	"SYS", "NODE", "CPU"
+};
+
+#ifndef HAVE_GETTID
+static inline pid_t gettid(void)
+{
+	return (pid_t)syscall(__NR_gettid);
+}
+#endif
+
+static int record__threads_enabled(struct record *rec)
+{
+	return rec->opts.threads_spec;
+}
+
+static bool switch_output_signal(struct record *rec)
+{
+	return rec->switch_output.signal &&
+	       trigger_is_ready(&switch_output_trigger);
+}
+
+static bool switch_output_size(struct record *rec)
+{
+	return rec->switch_output.size &&
+	       trigger_is_ready(&switch_output_trigger) &&
+	       (rec->bytes_written >= rec->switch_output.size);
+}
+
+static bool switch_output_time(struct record *rec)
+{
+	return rec->switch_output.time &&
+	       trigger_is_ready(&switch_output_trigger);
+}
+
+static u64 record__bytes_written(struct record *rec)
+{
+	return rec->bytes_written + rec->thread_bytes_written;
+}
+
+static bool record__output_max_size_exceeded(struct record *rec)
+{
+	return rec->output_max_size &&
+	       (record__bytes_written(rec) >= rec->output_max_size);
+}
+
+static int record__write(struct record *rec, struct mmap *map __maybe_unused,
+			 void *bf, size_t size)
+{
+	struct perf_data_file *file = &rec->session->data->file;
+
+	if (map && map->file)
+		file = map->file;
+
+	if (perf_data_file__write(file, bf, size) < 0) {
+		pr_err("failed to write perf data, error: %m\n");
+		return -1;
+	}
+
+	if (map && map->file) {
+		thread->bytes_written += size;
+		rec->thread_bytes_written += size;
+	} else {
+		rec->bytes_written += size;
+	}
+
+	if (record__output_max_size_exceeded(rec) && !done) {
+		fprintf(stderr, "[ perf record: perf size limit reached (%" PRIu64 " KB),"
+				" stopping session ]\n",
+				record__bytes_written(rec) >> 10);
+		done = 1;
+	}
+
+	if (switch_output_size(rec))
+		trigger_hit(&switch_output_trigger);
+
+	return 0;
+}
+
+static int record__aio_enabled(struct record *rec);
+static int record__comp_enabled(struct record *rec);
+static size_t zstd_compress(struct perf_session *session, struct mmap *map,
+			    void *dst, size_t dst_size, void *src, size_t src_size);
+
+#ifdef HAVE_AIO_SUPPORT
+static int record__aio_write(struct aiocb *cblock, int trace_fd,
+		void *buf, size_t size, off_t off)
+{
+	int rc;
+
+	cblock->aio_fildes = trace_fd;
+	cblock->aio_buf    = buf;
+	cblock->aio_nbytes = size;
+	cblock->aio_offset = off;
+	cblock->aio_sigevent.sigev_notify = SIGEV_NONE;
+
+	do {
+		rc = aio_write(cblock);
+		if (rc == 0) {
+			break;
+		} else if (errno != EAGAIN) {
+			cblock->aio_fildes = -1;
+			pr_err("failed to queue perf data, error: %m\n");
+			break;
+		}
+	} while (1);
+
+	return rc;
+}
+
+static int record__aio_complete(struct mmap *md, struct aiocb *cblock)
+{
+	void *rem_buf;
+	off_t rem_off;
+	size_t rem_size;
+	int rc, aio_errno;
+	ssize_t aio_ret, written;
+
+	aio_errno = aio_error(cblock);
+	if (aio_errno == EINPROGRESS)
+		return 0;
+
+	written = aio_ret = aio_return(cblock);
+	if (aio_ret < 0) {
+		if (aio_errno != EINTR)
+			pr_err("failed to write perf data, error: %m\n");
+		written = 0;
+	}
+
+	rem_size = cblock->aio_nbytes - written;
+
+	if (rem_size == 0) {
+		cblock->aio_fildes = -1;
+		/*
+		 * md->refcount is incremented in record__aio_pushfn() for
+		 * every aio write request started in record__aio_push() so
+		 * decrement it because the request is now complete.
+		 */
+		perf_mmap__put(&md->core);
+		rc = 1;
+	} else {
+		/*
+		 * aio write request may require restart with the
+		 * reminder if the kernel didn't write whole
+		 * chunk at once.
+		 */
+		rem_off = cblock->aio_offset + written;
+		rem_buf = (void *)(cblock->aio_buf + written);
+		record__aio_write(cblock, cblock->aio_fildes,
+				rem_buf, rem_size, rem_off);
+		rc = 0;
+	}
+
+	return rc;
+}
+
+static int record__aio_sync(struct mmap *md, bool sync_all)
+{
+	struct aiocb **aiocb = md->aio.aiocb;
+	struct aiocb *cblocks = md->aio.cblocks;
+	struct timespec timeout = { 0, 1000 * 1000  * 1 }; /* 1ms */
+	int i, do_suspend;
+
+	do {
+		do_suspend = 0;
+		for (i = 0; i < md->aio.nr_cblocks; ++i) {
+			if (cblocks[i].aio_fildes == -1 || record__aio_complete(md, &cblocks[i])) {
+				if (sync_all)
+					aiocb[i] = NULL;
+				else
+					return i;
+			} else {
+				/*
+				 * Started aio write is not complete yet
+				 * so it has to be waited before the
+				 * next allocation.
+				 */
+				aiocb[i] = &cblocks[i];
+				do_suspend = 1;
+			}
+		}
+		if (!do_suspend)
+			return -1;
+
+		while (aio_suspend((const struct aiocb **)aiocb, md->aio.nr_cblocks, &timeout)) {
+			if (!(errno == EAGAIN || errno == EINTR))
+				pr_err("failed to sync perf data, error: %m\n");
+		}
+	} while (1);
+}
+
+struct record_aio {
+	struct record	*rec;
+	void		*data;
+	size_t		size;
+};
+
+static int record__aio_pushfn(struct mmap *map, void *to, void *buf, size_t size)
+{
+	struct record_aio *aio = to;
+
+	/*
+	 * map->core.base data pointed by buf is copied into free map->aio.data[] buffer
+	 * to release space in the kernel buffer as fast as possible, calling
+	 * perf_mmap__consume() from perf_mmap__push() function.
+	 *
+	 * That lets the kernel to proceed with storing more profiling data into
+	 * the kernel buffer earlier than other per-cpu kernel buffers are handled.
+	 *
+	 * Coping can be done in two steps in case the chunk of profiling data
+	 * crosses the upper bound of the kernel buffer. In this case we first move
+	 * part of data from map->start till the upper bound and then the reminder
+	 * from the beginning of the kernel buffer till the end of the data chunk.
+	 */
+
+	if (record__comp_enabled(aio->rec)) {
+		size = zstd_compress(aio->rec->session, NULL, aio->data + aio->size,
+				     mmap__mmap_len(map) - aio->size,
+				     buf, size);
+	} else {
+		memcpy(aio->data + aio->size, buf, size);
+	}
+
+	if (!aio->size) {
+		/*
+		 * Increment map->refcount to guard map->aio.data[] buffer
+		 * from premature deallocation because map object can be
+		 * released earlier than aio write request started on
+		 * map->aio.data[] buffer is complete.
+		 *
+		 * perf_mmap__put() is done at record__aio_complete()
+		 * after started aio request completion or at record__aio_push()
+		 * if the request failed to start.
+		 */
+		perf_mmap__get(&map->core);
+	}
+
+	aio->size += size;
+
+	return size;
+}
+
+static int record__aio_push(struct record *rec, struct mmap *map, off_t *off)
+{
+	int ret, idx;
+	int trace_fd = rec->session->data->file.fd;
+	struct record_aio aio = { .rec = rec, .size = 0 };
+
+	/*
+	 * Call record__aio_sync() to wait till map->aio.data[] buffer
+	 * becomes available after previous aio write operation.
+	 */
+
+	idx = record__aio_sync(map, false);
+	aio.data = map->aio.data[idx];
+	ret = perf_mmap__push(map, &aio, record__aio_pushfn);
+	if (ret != 0) /* ret > 0 - no data, ret < 0 - error */
+		return ret;
+
+	rec->samples++;
+	ret = record__aio_write(&(map->aio.cblocks[idx]), trace_fd, aio.data, aio.size, *off);
+	if (!ret) {
+		*off += aio.size;
+		rec->bytes_written += aio.size;
+		if (switch_output_size(rec))
+			trigger_hit(&switch_output_trigger);
+	} else {
+		/*
+		 * Decrement map->refcount incremented in record__aio_pushfn()
+		 * back if record__aio_write() operation failed to start, otherwise
+		 * map->refcount is decremented in record__aio_complete() after
+		 * aio write operation finishes successfully.
+		 */
+		perf_mmap__put(&map->core);
+	}
+
+	return ret;
+}
+
+static off_t record__aio_get_pos(int trace_fd)
+{
+	return lseek(trace_fd, 0, SEEK_CUR);
+}
+
+static void record__aio_set_pos(int trace_fd, off_t pos)
+{
+	lseek(trace_fd, pos, SEEK_SET);
+}
+
+static void record__aio_mmap_read_sync(struct record *rec)
+{
+	int i;
+	struct evlist *evlist = rec->evlist;
+	struct mmap *maps = evlist->mmap;
+
+	if (!record__aio_enabled(rec))
+		return;
+
+	for (i = 0; i < evlist->core.nr_mmaps; i++) {
+		struct mmap *map = &maps[i];
+
+		if (map->core.base)
+			record__aio_sync(map, true);
+	}
+}
+
+static int nr_cblocks_default = 1;
+static int nr_cblocks_max = 4;
+
+static int record__aio_parse(const struct option *opt,
+			     const char *str,
+			     int unset)
+{
+	struct record_opts *opts = (struct record_opts *)opt->value;
+
+	if (unset) {
+		opts->nr_cblocks = 0;
+	} else {
+		if (str)
+			opts->nr_cblocks = strtol(str, NULL, 0);
+		if (!opts->nr_cblocks)
+			opts->nr_cblocks = nr_cblocks_default;
+	}
+
+	return 0;
+}
+#else /* HAVE_AIO_SUPPORT */
+static int nr_cblocks_max = 0;
+
+static int record__aio_push(struct record *rec __maybe_unused, struct mmap *map __maybe_unused,
+			    off_t *off __maybe_unused)
+{
+	return -1;
+}
+
+static off_t record__aio_get_pos(int trace_fd __maybe_unused)
+{
+	return -1;
+}
+
+static void record__aio_set_pos(int trace_fd __maybe_unused, off_t pos __maybe_unused)
+{
+}
+
+static void record__aio_mmap_read_sync(struct record *rec __maybe_unused)
+{
+}
+#endif
+
+static int record__aio_enabled(struct record *rec)
+{
+	return rec->opts.nr_cblocks > 0;
+}
+
+#define MMAP_FLUSH_DEFAULT 1
+static int record__mmap_flush_parse(const struct option *opt,
+				    const char *str,
+				    int unset)
+{
+	int flush_max;
+	struct record_opts *opts = (struct record_opts *)opt->value;
+	static struct parse_tag tags[] = {
+			{ .tag  = 'B', .mult = 1       },
+			{ .tag  = 'K', .mult = 1 << 10 },
+			{ .tag  = 'M', .mult = 1 << 20 },
+			{ .tag  = 'G', .mult = 1 << 30 },
+			{ .tag  = 0 },
+	};
+
+	if (unset)
+		return 0;
+
+	if (str) {
+		opts->mmap_flush = parse_tag_value(str, tags);
+		if (opts->mmap_flush == (int)-1)
+			opts->mmap_flush = strtol(str, NULL, 0);
+	}
+
+	if (!opts->mmap_flush)
+		opts->mmap_flush = MMAP_FLUSH_DEFAULT;
+
+	flush_max = evlist__mmap_size(opts->mmap_pages);
+	flush_max /= 4;
+	if (opts->mmap_flush > flush_max)
+		opts->mmap_flush = flush_max;
+
+	return 0;
+}
+
+#ifdef HAVE_ZSTD_SUPPORT
+static unsigned int comp_level_default = 1;
+
+static int record__parse_comp_level(const struct option *opt, const char *str, int unset)
+{
+	struct record_opts *opts = opt->value;
+
+	if (unset) {
+		opts->comp_level = 0;
+	} else {
+		if (str)
+			opts->comp_level = strtol(str, NULL, 0);
+		if (!opts->comp_level)
+			opts->comp_level = comp_level_default;
+	}
+
+	return 0;
+}
+#endif
+static unsigned int comp_level_max = 22;
+
+static int record__comp_enabled(struct record *rec)
+{
+	return rec->opts.comp_level > 0;
+}
+
+static int process_synthesized_event(struct perf_tool *tool,
+				     union perf_event *event,
+				     struct perf_sample *sample __maybe_unused,
+				     struct machine *machine __maybe_unused)
+{
+	struct record *rec = container_of(tool, struct record, tool);
+	return record__write(rec, NULL, event, event->header.size);
+}
+
+static struct mutex synth_lock;
+
+static int process_locked_synthesized_event(struct perf_tool *tool,
+				     union perf_event *event,
+				     struct perf_sample *sample __maybe_unused,
+				     struct machine *machine __maybe_unused)
+{
+	int ret;
+
+	mutex_lock(&synth_lock);
+	ret = process_synthesized_event(tool, event, sample, machine);
+	mutex_unlock(&synth_lock);
+	return ret;
+}
+
+static int record__pushfn(struct mmap *map, void *to, void *bf, size_t size)
+{
+	struct record *rec = to;
+
+	if (record__comp_enabled(rec)) {
+		size = zstd_compress(rec->session, map, map->data, mmap__mmap_len(map), bf, size);
+		bf   = map->data;
+	}
+
+	thread->samples++;
+	return record__write(rec, map, bf, size);
+}
+
+static volatile sig_atomic_t signr = -1;
+static volatile sig_atomic_t child_finished;
+#ifdef HAVE_EVENTFD_SUPPORT
+static volatile sig_atomic_t done_fd = -1;
+#endif
+
+static void sig_handler(int sig)
+{
+	if (sig == SIGCHLD)
+		child_finished = 1;
+	else
+		signr = sig;
+
+	done = 1;
+#ifdef HAVE_EVENTFD_SUPPORT
+	if (done_fd >= 0) {
+		u64 tmp = 1;
+		int orig_errno = errno;
+
+		/*
+		 * It is possible for this signal handler to run after done is
+		 * checked in the main loop, but before the perf counter fds are
+		 * polled. If this happens, the poll() will continue to wait
+		 * even though done is set, and will only break out if either
+		 * another signal is received, or the counters are ready for
+		 * read. To ensure the poll() doesn't sleep when done is set,
+		 * use an eventfd (done_fd) to wake up the poll().
+		 */
+		if (write(done_fd, &tmp, sizeof(tmp)) < 0)
+			pr_err("failed to signal wakeup fd, error: %m\n");
+
+		errno = orig_errno;
+	}
+#endif // HAVE_EVENTFD_SUPPORT
+}
+
+static void sigsegv_handler(int sig)
+{
+	perf_hooks__recover();
+	sighandler_dump_stack(sig);
+}
+
+static void record__sig_exit(void)
+{
+	if (signr == -1)
+		return;
+
+	signal(signr, SIG_DFL);
+	raise(signr);
+}
+
+#ifdef HAVE_AUXTRACE_SUPPORT
+
+static int record__process_auxtrace(struct perf_tool *tool,
+				    struct mmap *map,
+				    union perf_event *event, void *data1,
+				    size_t len1, void *data2, size_t len2)
+{
+	struct record *rec = container_of(tool, struct record, tool);
+	struct perf_data *data = &rec->data;
+	size_t padding;
+	u8 pad[8] = {0};
+
+	if (!perf_data__is_pipe(data) && perf_data__is_single_file(data)) {
+		off_t file_offset;
+		int fd = perf_data__fd(data);
+		int err;
+
+		file_offset = lseek(fd, 0, SEEK_CUR);
+		if (file_offset == -1)
+			return -1;
+		err = auxtrace_index__auxtrace_event(&rec->session->auxtrace_index,
+						     event, file_offset);
+		if (err)
+			return err;
+	}
+
+	/* event.auxtrace.size includes padding, see __auxtrace_mmap__read() */
+	padding = (len1 + len2) & 7;
+	if (padding)
+		padding = 8 - padding;
+
+	record__write(rec, map, event, event->header.size);
+	record__write(rec, map, data1, len1);
+	if (len2)
+		record__write(rec, map, data2, len2);
+	record__write(rec, map, &pad, padding);
+
+	return 0;
+}
+
+static int record__auxtrace_mmap_read(struct record *rec,
+				      struct mmap *map)
+{
+	int ret;
+
+	ret = auxtrace_mmap__read(map, rec->itr, &rec->tool,
+				  record__process_auxtrace);
+	if (ret < 0)
+		return ret;
+
+	if (ret)
+		rec->samples++;
+
+	return 0;
+}
+
+static int record__auxtrace_mmap_read_snapshot(struct record *rec,
+					       struct mmap *map)
+{
+	int ret;
+
+	ret = auxtrace_mmap__read_snapshot(map, rec->itr, &rec->tool,
+					   record__process_auxtrace,
+					   rec->opts.auxtrace_snapshot_size);
+	if (ret < 0)
+		return ret;
+
+	if (ret)
+		rec->samples++;
+
+	return 0;
+}
+
+static int record__auxtrace_read_snapshot_all(struct record *rec)
+{
+	int i;
+	int rc = 0;
+
+	for (i = 0; i < rec->evlist->core.nr_mmaps; i++) {
+		struct mmap *map = &rec->evlist->mmap[i];
+
+		if (!map->auxtrace_mmap.base)
+			continue;
+
+		if (record__auxtrace_mmap_read_snapshot(rec, map) != 0) {
+			rc = -1;
+			goto out;
+		}
+	}
+out:
+	return rc;
+}
+
+static void record__read_auxtrace_snapshot(struct record *rec, bool on_exit)
+{
+	pr_debug("Recording AUX area tracing snapshot\n");
+	if (record__auxtrace_read_snapshot_all(rec) < 0) {
+		trigger_error(&auxtrace_snapshot_trigger);
+	} else {
+		if (auxtrace_record__snapshot_finish(rec->itr, on_exit))
+			trigger_error(&auxtrace_snapshot_trigger);
+		else
+			trigger_ready(&auxtrace_snapshot_trigger);
+	}
+}
+
+static int record__auxtrace_snapshot_exit(struct record *rec)
+{
+	if (trigger_is_error(&auxtrace_snapshot_trigger))
+		return 0;
+
+	if (!auxtrace_record__snapshot_started &&
+	    auxtrace_record__snapshot_start(rec->itr))
+		return -1;
+
+	record__read_auxtrace_snapshot(rec, true);
+	if (trigger_is_error(&auxtrace_snapshot_trigger))
+		return -1;
+
+	return 0;
+}
+
+static int record__auxtrace_init(struct record *rec)
+{
+	int err;
+
+	if ((rec->opts.auxtrace_snapshot_opts || rec->opts.auxtrace_sample_opts)
+	    && record__threads_enabled(rec)) {
+		pr_err("AUX area tracing options are not available in parallel streaming mode.\n");
+		return -EINVAL;
+	}
+
+	if (!rec->itr) {
+		rec->itr = auxtrace_record__init(rec->evlist, &err);
+		if (err)
+			return err;
+	}
+
+	err = auxtrace_parse_snapshot_options(rec->itr, &rec->opts,
+					      rec->opts.auxtrace_snapshot_opts);
+	if (err)
+		return err;
+
+	err = auxtrace_parse_sample_options(rec->itr, rec->evlist, &rec->opts,
+					    rec->opts.auxtrace_sample_opts);
+	if (err)
+		return err;
+
+	auxtrace_regroup_aux_output(rec->evlist);
+
+	return auxtrace_parse_filters(rec->evlist);
+}
+
+#else
+
+static inline
+int record__auxtrace_mmap_read(struct record *rec __maybe_unused,
+			       struct mmap *map __maybe_unused)
+{
+	return 0;
+}
+
+static inline
+void record__read_auxtrace_snapshot(struct record *rec __maybe_unused,
+				    bool on_exit __maybe_unused)
+{
+}
+
+static inline
+int auxtrace_record__snapshot_start(struct auxtrace_record *itr __maybe_unused)
+{
+	return 0;
+}
+
+static inline
+int record__auxtrace_snapshot_exit(struct record *rec __maybe_unused)
+{
+	return 0;
+}
+
+static int record__auxtrace_init(struct record *rec __maybe_unused)
+{
+	return 0;
+}
+
+#endif
+
+static int record__config_text_poke(struct evlist *evlist)
+{
+	struct evsel *evsel;
+
+	/* Nothing to do if text poke is already configured */
+	evlist__for_each_entry(evlist, evsel) {
+		if (evsel->core.attr.text_poke)
+			return 0;
+	}
+
+	evsel = evlist__add_dummy_on_all_cpus(evlist);
+	if (!evsel)
+		return -ENOMEM;
+
+	evsel->core.attr.text_poke = 1;
+	evsel->core.attr.ksymbol = 1;
+	evsel->immediate = true;
+	evsel__set_sample_bit(evsel, TIME);
+
+	return 0;
+}
+
+static int record__config_off_cpu(struct record *rec)
+{
+	return off_cpu_prepare(rec->evlist, &rec->opts.target, &rec->opts);
+}
+
+static bool record__kcore_readable(struct machine *machine)
+{
+	char kcore[PATH_MAX];
+	int fd;
+
+	scnprintf(kcore, sizeof(kcore), "%s/proc/kcore", machine->root_dir);
+
+	fd = open(kcore, O_RDONLY);
+	if (fd < 0)
+		return false;
+
+	close(fd);
+
+	return true;
+}
+
+static int record__kcore_copy(struct machine *machine, struct perf_data *data)
+{
+	char from_dir[PATH_MAX];
+	char kcore_dir[PATH_MAX];
+	int ret;
+
+	snprintf(from_dir, sizeof(from_dir), "%s/proc", machine->root_dir);
+
+	ret = perf_data__make_kcore_dir(data, kcore_dir, sizeof(kcore_dir));
+	if (ret)
+		return ret;
+
+	return kcore_copy(from_dir, kcore_dir);
+}
+
+static void record__thread_data_init_pipes(struct record_thread *thread_data)
+{
+	thread_data->pipes.msg[0] = -1;
+	thread_data->pipes.msg[1] = -1;
+	thread_data->pipes.ack[0] = -1;
+	thread_data->pipes.ack[1] = -1;
+}
+
+static int record__thread_data_open_pipes(struct record_thread *thread_data)
+{
+	if (pipe(thread_data->pipes.msg))
+		return -EINVAL;
+
+	if (pipe(thread_data->pipes.ack)) {
+		close(thread_data->pipes.msg[0]);
+		thread_data->pipes.msg[0] = -1;
+		close(thread_data->pipes.msg[1]);
+		thread_data->pipes.msg[1] = -1;
+		return -EINVAL;
+	}
+
+	pr_debug2("thread_data[%p]: msg=[%d,%d], ack=[%d,%d]\n", thread_data,
+		 thread_data->pipes.msg[0], thread_data->pipes.msg[1],
+		 thread_data->pipes.ack[0], thread_data->pipes.ack[1]);
+
+	return 0;
+}
+
+static void record__thread_data_close_pipes(struct record_thread *thread_data)
+{
+	if (thread_data->pipes.msg[0] != -1) {
+		close(thread_data->pipes.msg[0]);
+		thread_data->pipes.msg[0] = -1;
+	}
+	if (thread_data->pipes.msg[1] != -1) {
+		close(thread_data->pipes.msg[1]);
+		thread_data->pipes.msg[1] = -1;
+	}
+	if (thread_data->pipes.ack[0] != -1) {
+		close(thread_data->pipes.ack[0]);
+		thread_data->pipes.ack[0] = -1;
+	}
+	if (thread_data->pipes.ack[1] != -1) {
+		close(thread_data->pipes.ack[1]);
+		thread_data->pipes.ack[1] = -1;
+	}
+}
+
+static bool evlist__per_thread(struct evlist *evlist)
+{
+	return cpu_map__is_dummy(evlist->core.user_requested_cpus);
+}
+
+static int record__thread_data_init_maps(struct record_thread *thread_data, struct evlist *evlist)
+{
+	int m, tm, nr_mmaps = evlist->core.nr_mmaps;
+	struct mmap *mmap = evlist->mmap;
+	struct mmap *overwrite_mmap = evlist->overwrite_mmap;
+	struct perf_cpu_map *cpus = evlist->core.all_cpus;
+	bool per_thread = evlist__per_thread(evlist);
+
+	if (per_thread)
+		thread_data->nr_mmaps = nr_mmaps;
+	else
+		thread_data->nr_mmaps = bitmap_weight(thread_data->mask->maps.bits,
+						      thread_data->mask->maps.nbits);
+	if (mmap) {
+		thread_data->maps = zalloc(thread_data->nr_mmaps * sizeof(struct mmap *));
+		if (!thread_data->maps)
+			return -ENOMEM;
+	}
+	if (overwrite_mmap) {
+		thread_data->overwrite_maps = zalloc(thread_data->nr_mmaps * sizeof(struct mmap *));
+		if (!thread_data->overwrite_maps) {
+			zfree(&thread_data->maps);
+			return -ENOMEM;
+		}
+	}
+	pr_debug2("thread_data[%p]: nr_mmaps=%d, maps=%p, ow_maps=%p\n", thread_data,
+		 thread_data->nr_mmaps, thread_data->maps, thread_data->overwrite_maps);
+
+	for (m = 0, tm = 0; m < nr_mmaps && tm < thread_data->nr_mmaps; m++) {
+		if (per_thread ||
+		    test_bit(perf_cpu_map__cpu(cpus, m).cpu, thread_data->mask->maps.bits)) {
+			if (thread_data->maps) {
+				thread_data->maps[tm] = &mmap[m];
+				pr_debug2("thread_data[%p]: cpu%d: maps[%d] -> mmap[%d]\n",
+					  thread_data, perf_cpu_map__cpu(cpus, m).cpu, tm, m);
+			}
+			if (thread_data->overwrite_maps) {
+				thread_data->overwrite_maps[tm] = &overwrite_mmap[m];
+				pr_debug2("thread_data[%p]: cpu%d: ow_maps[%d] -> ow_mmap[%d]\n",
+					  thread_data, perf_cpu_map__cpu(cpus, m).cpu, tm, m);
+			}
+			tm++;
+		}
+	}
+
+	return 0;
+}
+
+static int record__thread_data_init_pollfd(struct record_thread *thread_data, struct evlist *evlist)
+{
+	int f, tm, pos;
+	struct mmap *map, *overwrite_map;
+
+	fdarray__init(&thread_data->pollfd, 64);
+
+	for (tm = 0; tm < thread_data->nr_mmaps; tm++) {
+		map = thread_data->maps ? thread_data->maps[tm] : NULL;
+		overwrite_map = thread_data->overwrite_maps ?
+				thread_data->overwrite_maps[tm] : NULL;
+
+		for (f = 0; f < evlist->core.pollfd.nr; f++) {
+			void *ptr = evlist->core.pollfd.priv[f].ptr;
+
+			if ((map && ptr == map) || (overwrite_map && ptr == overwrite_map)) {
+				pos = fdarray__dup_entry_from(&thread_data->pollfd, f,
+							      &evlist->core.pollfd);
+				if (pos < 0)
+					return pos;
+				pr_debug2("thread_data[%p]: pollfd[%d] <- event_fd=%d\n",
+					 thread_data, pos, evlist->core.pollfd.entries[f].fd);
+			}
+		}
+	}
+
+	return 0;
+}
+
+static void record__free_thread_data(struct record *rec)
+{
+	int t;
+	struct record_thread *thread_data = rec->thread_data;
+
+	if (thread_data == NULL)
+		return;
+
+	for (t = 0; t < rec->nr_threads; t++) {
+		record__thread_data_close_pipes(&thread_data[t]);
+		zfree(&thread_data[t].maps);
+		zfree(&thread_data[t].overwrite_maps);
+		fdarray__exit(&thread_data[t].pollfd);
+	}
+
+	zfree(&rec->thread_data);
+}
+
+static int record__map_thread_evlist_pollfd_indexes(struct record *rec,
+						    int evlist_pollfd_index,
+						    int thread_pollfd_index)
+{
+	size_t x = rec->index_map_cnt;
+
+	if (realloc_array_as_needed(rec->index_map, rec->index_map_sz, x, NULL))
+		return -ENOMEM;
+	rec->index_map[x].evlist_pollfd_index = evlist_pollfd_index;
+	rec->index_map[x].thread_pollfd_index = thread_pollfd_index;
+	rec->index_map_cnt += 1;
+	return 0;
+}
+
+static int record__update_evlist_pollfd_from_thread(struct record *rec,
+						    struct evlist *evlist,
+						    struct record_thread *thread_data)
+{
+	struct pollfd *e_entries = evlist->core.pollfd.entries;
+	struct pollfd *t_entries = thread_data->pollfd.entries;
+	int err = 0;
+	size_t i;
+
+	for (i = 0; i < rec->index_map_cnt; i++) {
+		int e_pos = rec->index_map[i].evlist_pollfd_index;
+		int t_pos = rec->index_map[i].thread_pollfd_index;
+
+		if (e_entries[e_pos].fd != t_entries[t_pos].fd ||
+		    e_entries[e_pos].events != t_entries[t_pos].events) {
+			pr_err("Thread and evlist pollfd index mismatch\n");
+			err = -EINVAL;
+			continue;
+		}
+		e_entries[e_pos].revents = t_entries[t_pos].revents;
+	}
+	return err;
+}
+
+static int record__dup_non_perf_events(struct record *rec,
+				       struct evlist *evlist,
+				       struct record_thread *thread_data)
+{
+	struct fdarray *fda = &evlist->core.pollfd;
+	int i, ret;
+
+	for (i = 0; i < fda->nr; i++) {
+		if (!(fda->priv[i].flags & fdarray_flag__non_perf_event))
+			continue;
+		ret = fdarray__dup_entry_from(&thread_data->pollfd, i, fda);
+		if (ret < 0) {
+			pr_err("Failed to duplicate descriptor in main thread pollfd\n");
+			return ret;
+		}
+		pr_debug2("thread_data[%p]: pollfd[%d] <- non_perf_event fd=%d\n",
+			  thread_data, ret, fda->entries[i].fd);
+		ret = record__map_thread_evlist_pollfd_indexes(rec, i, ret);
+		if (ret < 0) {
+			pr_err("Failed to map thread and evlist pollfd indexes\n");
+			return ret;
+		}
+	}
+	return 0;
+}
+
+static int record__alloc_thread_data(struct record *rec, struct evlist *evlist)
+{
+	int t, ret;
+	struct record_thread *thread_data;
+
+	rec->thread_data = zalloc(rec->nr_threads * sizeof(*(rec->thread_data)));
+	if (!rec->thread_data) {
+		pr_err("Failed to allocate thread data\n");
+		return -ENOMEM;
+	}
+	thread_data = rec->thread_data;
+
+	for (t = 0; t < rec->nr_threads; t++)
+		record__thread_data_init_pipes(&thread_data[t]);
+
+	for (t = 0; t < rec->nr_threads; t++) {
+		thread_data[t].rec = rec;
+		thread_data[t].mask = &rec->thread_masks[t];
+		ret = record__thread_data_init_maps(&thread_data[t], evlist);
+		if (ret) {
+			pr_err("Failed to initialize thread[%d] maps\n", t);
+			goto out_free;
+		}
+		ret = record__thread_data_init_pollfd(&thread_data[t], evlist);
+		if (ret) {
+			pr_err("Failed to initialize thread[%d] pollfd\n", t);
+			goto out_free;
+		}
+		if (t) {
+			thread_data[t].tid = -1;
+			ret = record__thread_data_open_pipes(&thread_data[t]);
+			if (ret) {
+				pr_err("Failed to open thread[%d] communication pipes\n", t);
+				goto out_free;
+			}
+			ret = fdarray__add(&thread_data[t].pollfd, thread_data[t].pipes.msg[0],
+					   POLLIN | POLLERR | POLLHUP, fdarray_flag__nonfilterable);
+			if (ret < 0) {
+				pr_err("Failed to add descriptor to thread[%d] pollfd\n", t);
+				goto out_free;
+			}
+			thread_data[t].ctlfd_pos = ret;
+			pr_debug2("thread_data[%p]: pollfd[%d] <- ctl_fd=%d\n",
+				 thread_data, thread_data[t].ctlfd_pos,
+				 thread_data[t].pipes.msg[0]);
+		} else {
+			thread_data[t].tid = gettid();
+
+			ret = record__dup_non_perf_events(rec, evlist, &thread_data[t]);
+			if (ret < 0)
+				goto out_free;
+
+			thread_data[t].ctlfd_pos = -1; /* Not used */
+		}
+	}
+
+	return 0;
+
+out_free:
+	record__free_thread_data(rec);
+
+	return ret;
+}
+
+static int record__mmap_evlist(struct record *rec,
+			       struct evlist *evlist)
+{
+	int i, ret;
+	struct record_opts *opts = &rec->opts;
+	bool auxtrace_overwrite = opts->auxtrace_snapshot_mode ||
+				  opts->auxtrace_sample_mode;
+	char msg[512];
+
+	if (opts->affinity != PERF_AFFINITY_SYS)
+		cpu__setup_cpunode_map();
+
+	if (evlist__mmap_ex(evlist, opts->mmap_pages,
+				 opts->auxtrace_mmap_pages,
+				 auxtrace_overwrite,
+				 opts->nr_cblocks, opts->affinity,
+				 opts->mmap_flush, opts->comp_level) < 0) {
+		if (errno == EPERM) {
+			pr_err("Permission error mapping pages.\n"
+			       "Consider increasing "
+			       "/proc/sys/kernel/perf_event_mlock_kb,\n"
+			       "or try again with a smaller value of -m/--mmap_pages.\n"
+			       "(current value: %u,%u)\n",
+			       opts->mmap_pages, opts->auxtrace_mmap_pages);
+			return -errno;
+		} else {
+			pr_err("failed to mmap with %d (%s)\n", errno,
+				str_error_r(errno, msg, sizeof(msg)));
+			if (errno)
+				return -errno;
+			else
+				return -EINVAL;
+		}
+	}
+
+	if (evlist__initialize_ctlfd(evlist, opts->ctl_fd, opts->ctl_fd_ack))
+		return -1;
+
+	ret = record__alloc_thread_data(rec, evlist);
+	if (ret)
+		return ret;
+
+	if (record__threads_enabled(rec)) {
+		ret = perf_data__create_dir(&rec->data, evlist->core.nr_mmaps);
+		if (ret) {
+			pr_err("Failed to create data directory: %s\n", strerror(-ret));
+			return ret;
+		}
+		for (i = 0; i < evlist->core.nr_mmaps; i++) {
+			if (evlist->mmap)
+				evlist->mmap[i].file = &rec->data.dir.files[i];
+			if (evlist->overwrite_mmap)
+				evlist->overwrite_mmap[i].file = &rec->data.dir.files[i];
+		}
+	}
+
+	return 0;
+}
+
+static int record__mmap(struct record *rec)
+{
+	return record__mmap_evlist(rec, rec->evlist);
+}
+
+static int record__open(struct record *rec)
+{
+	char msg[BUFSIZ];
+	struct evsel *pos;
+	struct evlist *evlist = rec->evlist;
+	struct perf_session *session = rec->session;
+	struct record_opts *opts = &rec->opts;
+	int rc = 0;
+
+	/*
+	 * For initial_delay, system wide or a hybrid system, we need to add a
+	 * dummy event so that we can track PERF_RECORD_MMAP to cover the delay
+	 * of waiting or event synthesis.
+	 */
+	if (opts->target.initial_delay || target__has_cpu(&opts->target) ||
+	    perf_pmus__num_core_pmus() > 1) {
+		pos = evlist__get_tracking_event(evlist);
+		if (!evsel__is_dummy_event(pos)) {
+			/* Set up dummy event. */
+			if (evlist__add_dummy(evlist))
+				return -ENOMEM;
+			pos = evlist__last(evlist);
+			evlist__set_tracking_event(evlist, pos);
+		}
+
+		/*
+		 * Enable the dummy event when the process is forked for
+		 * initial_delay, immediately for system wide.
+		 */
+		if (opts->target.initial_delay && !pos->immediate &&
+		    !target__has_cpu(&opts->target))
+			pos->core.attr.enable_on_exec = 1;
+		else
+			pos->immediate = 1;
+	}
+
+	evlist__config(evlist, opts, &callchain_param);
+
+	evlist__for_each_entry(evlist, pos) {
+try_again:
+		if (evsel__open(pos, pos->core.cpus, pos->core.threads) < 0) {
+			if (evsel__fallback(pos, errno, msg, sizeof(msg))) {
+				if (verbose > 0)
+					ui__warning("%s\n", msg);
+				goto try_again;
+			}
+			if ((errno == EINVAL || errno == EBADF) &&
+			    pos->core.leader != &pos->core &&
+			    pos->weak_group) {
+			        pos = evlist__reset_weak_group(evlist, pos, true);
+				goto try_again;
+			}
+			rc = -errno;
+			evsel__open_strerror(pos, &opts->target, errno, msg, sizeof(msg));
+			ui__error("%s\n", msg);
+			goto out;
+		}
+
+		pos->supported = true;
+	}
+
+	if (symbol_conf.kptr_restrict && !evlist__exclude_kernel(evlist)) {
+		pr_warning(
+"WARNING: Kernel address maps (/proc/{kallsyms,modules}) are restricted,\n"
+"check /proc/sys/kernel/kptr_restrict and /proc/sys/kernel/perf_event_paranoid.\n\n"
+"Samples in kernel functions may not be resolved if a suitable vmlinux\n"
+"file is not found in the buildid cache or in the vmlinux path.\n\n"
+"Samples in kernel modules won't be resolved at all.\n\n"
+"If some relocation was applied (e.g. kexec) symbols may be misresolved\n"
+"even with a suitable vmlinux or kallsyms file.\n\n");
+	}
+
+	if (evlist__apply_filters(evlist, &pos)) {
+		pr_err("failed to set filter \"%s\" on event %s with %d (%s)\n",
+			pos->filter ?: "BPF", evsel__name(pos), errno,
+			str_error_r(errno, msg, sizeof(msg)));
+		rc = -1;
+		goto out;
+	}
+
+	rc = record__mmap(rec);
+	if (rc)
+		goto out;
+
+	session->evlist = evlist;
+	perf_session__set_id_hdr_size(session);
+out:
+	return rc;
+}
+
+static void set_timestamp_boundary(struct record *rec, u64 sample_time)
+{
+	if (rec->evlist->first_sample_time == 0)
+		rec->evlist->first_sample_time = sample_time;
+
+	if (sample_time)
+		rec->evlist->last_sample_time = sample_time;
+}
+
+static int process_sample_event(struct perf_tool *tool,
+				union perf_event *event,
+				struct perf_sample *sample,
+				struct evsel *evsel,
+				struct machine *machine)
+{
+	struct record *rec = container_of(tool, struct record, tool);
+
+	set_timestamp_boundary(rec, sample->time);
+
+	if (rec->buildid_all)
+		return 0;
+
+	rec->samples++;
+	return build_id__mark_dso_hit(tool, event, sample, evsel, machine);
+}
+
+static int process_buildids(struct record *rec)
+{
+	struct perf_session *session = rec->session;
+
+	if (perf_data__size(&rec->data) == 0)
+		return 0;
+
+	/*
+	 * During this process, it'll load kernel map and replace the
+	 * dso->long_name to a real pathname it found.  In this case
+	 * we prefer the vmlinux path like
+	 *   /lib/modules/3.16.4/build/vmlinux
+	 *
+	 * rather than build-id path (in debug directory).
+	 *   $HOME/.debug/.build-id/f0/6e17aa50adf4d00b88925e03775de107611551
+	 */
+	symbol_conf.ignore_vmlinux_buildid = true;
+
+	/*
+	 * If --buildid-all is given, it marks all DSO regardless of hits,
+	 * so no need to process samples. But if timestamp_boundary is enabled,
+	 * it still needs to walk on all samples to get the timestamps of
+	 * first/last samples.
+	 */
+	if (rec->buildid_all && !rec->timestamp_boundary)
+		rec->tool.sample = NULL;
+
+	return perf_session__process_events(session);
+}
+
+static void perf_event__synthesize_guest_os(struct machine *machine, void *data)
+{
+	int err;
+	struct perf_tool *tool = data;
+	/*
+	 *As for guest kernel when processing subcommand record&report,
+	 *we arrange module mmap prior to guest kernel mmap and trigger
+	 *a preload dso because default guest module symbols are loaded
+	 *from guest kallsyms instead of /lib/modules/XXX/XXX. This
+	 *method is used to avoid symbol missing when the first addr is
+	 *in module instead of in guest kernel.
+	 */
+	err = perf_event__synthesize_modules(tool, process_synthesized_event,
+					     machine);
+	if (err < 0)
+		pr_err("Couldn't record guest kernel [%d]'s reference"
+		       " relocation symbol.\n", machine->pid);
+
+	/*
+	 * We use _stext for guest kernel because guest kernel's /proc/kallsyms
+	 * have no _text sometimes.
+	 */
+	err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event,
+						 machine);
+	if (err < 0)
+		pr_err("Couldn't record guest kernel [%d]'s reference"
+		       " relocation symbol.\n", machine->pid);
+}
+
+static struct perf_event_header finished_round_event = {
+	.size = sizeof(struct perf_event_header),
+	.type = PERF_RECORD_FINISHED_ROUND,
+};
+
+static struct perf_event_header finished_init_event = {
+	.size = sizeof(struct perf_event_header),
+	.type = PERF_RECORD_FINISHED_INIT,
+};
+
+static void record__adjust_affinity(struct record *rec, struct mmap *map)
+{
+	if (rec->opts.affinity != PERF_AFFINITY_SYS &&
+	    !bitmap_equal(thread->mask->affinity.bits, map->affinity_mask.bits,
+			  thread->mask->affinity.nbits)) {
+		bitmap_zero(thread->mask->affinity.bits, thread->mask->affinity.nbits);
+		bitmap_or(thread->mask->affinity.bits, thread->mask->affinity.bits,
+			  map->affinity_mask.bits, thread->mask->affinity.nbits);
+		sched_setaffinity(0, MMAP_CPU_MASK_BYTES(&thread->mask->affinity),
+					(cpu_set_t *)thread->mask->affinity.bits);
+		if (verbose == 2) {
+			pr_debug("threads[%d]: running on cpu%d: ", thread->tid, sched_getcpu());
+			mmap_cpu_mask__scnprintf(&thread->mask->affinity, "affinity");
+		}
+	}
+}
+
+static size_t process_comp_header(void *record, size_t increment)
+{
+	struct perf_record_compressed *event = record;
+	size_t size = sizeof(*event);
+
+	if (increment) {
+		event->header.size += increment;
+		return increment;
+	}
+
+	event->header.type = PERF_RECORD_COMPRESSED;
+	event->header.size = size;
+
+	return size;
+}
+
+static size_t zstd_compress(struct perf_session *session, struct mmap *map,
+			    void *dst, size_t dst_size, void *src, size_t src_size)
+{
+	size_t compressed;
+	size_t max_record_size = PERF_SAMPLE_MAX_SIZE - sizeof(struct perf_record_compressed) - 1;
+	struct zstd_data *zstd_data = &session->zstd_data;
+
+	if (map && map->file)
+		zstd_data = &map->zstd_data;
+
+	compressed = zstd_compress_stream_to_records(zstd_data, dst, dst_size, src, src_size,
+						     max_record_size, process_comp_header);
+
+	if (map && map->file) {
+		thread->bytes_transferred += src_size;
+		thread->bytes_compressed  += compressed;
+	} else {
+		session->bytes_transferred += src_size;
+		session->bytes_compressed  += compressed;
+	}
+
+	return compressed;
+}
+
+static int record__mmap_read_evlist(struct record *rec, struct evlist *evlist,
+				    bool overwrite, bool synch)
+{
+	u64 bytes_written = rec->bytes_written;
+	int i;
+	int rc = 0;
+	int nr_mmaps;
+	struct mmap **maps;
+	int trace_fd = rec->data.file.fd;
+	off_t off = 0;
+
+	if (!evlist)
+		return 0;
+
+	nr_mmaps = thread->nr_mmaps;
+	maps = overwrite ? thread->overwrite_maps : thread->maps;
+
+	if (!maps)
+		return 0;
+
+	if (overwrite && evlist->bkw_mmap_state != BKW_MMAP_DATA_PENDING)
+		return 0;
+
+	if (record__aio_enabled(rec))
+		off = record__aio_get_pos(trace_fd);
+
+	for (i = 0; i < nr_mmaps; i++) {
+		u64 flush = 0;
+		struct mmap *map = maps[i];
+
+		if (map->core.base) {
+			record__adjust_affinity(rec, map);
+			if (synch) {
+				flush = map->core.flush;
+				map->core.flush = 1;
+			}
+			if (!record__aio_enabled(rec)) {
+				if (perf_mmap__push(map, rec, record__pushfn) < 0) {
+					if (synch)
+						map->core.flush = flush;
+					rc = -1;
+					goto out;
+				}
+			} else {
+				if (record__aio_push(rec, map, &off) < 0) {
+					record__aio_set_pos(trace_fd, off);
+					if (synch)
+						map->core.flush = flush;
+					rc = -1;
+					goto out;
+				}
+			}
+			if (synch)
+				map->core.flush = flush;
+		}
+
+		if (map->auxtrace_mmap.base && !rec->opts.auxtrace_snapshot_mode &&
+		    !rec->opts.auxtrace_sample_mode &&
+		    record__auxtrace_mmap_read(rec, map) != 0) {
+			rc = -1;
+			goto out;
+		}
+	}
+
+	if (record__aio_enabled(rec))
+		record__aio_set_pos(trace_fd, off);
+
+	/*
+	 * Mark the round finished in case we wrote
+	 * at least one event.
+	 *
+	 * No need for round events in directory mode,
+	 * because per-cpu maps and files have data
+	 * sorted by kernel.
+	 */
+	if (!record__threads_enabled(rec) && bytes_written != rec->bytes_written)
+		rc = record__write(rec, NULL, &finished_round_event, sizeof(finished_round_event));
+
+	if (overwrite)
+		evlist__toggle_bkw_mmap(evlist, BKW_MMAP_EMPTY);
+out:
+	return rc;
+}
+
+static int record__mmap_read_all(struct record *rec, bool synch)
+{
+	int err;
+
+	err = record__mmap_read_evlist(rec, rec->evlist, false, synch);
+	if (err)
+		return err;
+
+	return record__mmap_read_evlist(rec, rec->evlist, true, synch);
+}
+
+static void record__thread_munmap_filtered(struct fdarray *fda, int fd,
+					   void *arg __maybe_unused)
+{
+	struct perf_mmap *map = fda->priv[fd].ptr;
+
+	if (map)
+		perf_mmap__put(map);
+}
+
+static void *record__thread(void *arg)
+{
+	enum thread_msg msg = THREAD_MSG__READY;
+	bool terminate = false;
+	struct fdarray *pollfd;
+	int err, ctlfd_pos;
+
+	thread = arg;
+	thread->tid = gettid();
+
+	err = write(thread->pipes.ack[1], &msg, sizeof(msg));
+	if (err == -1)
+		pr_warning("threads[%d]: failed to notify on start: %s\n",
+			   thread->tid, strerror(errno));
+
+	pr_debug("threads[%d]: started on cpu%d\n", thread->tid, sched_getcpu());
+
+	pollfd = &thread->pollfd;
+	ctlfd_pos = thread->ctlfd_pos;
+
+	for (;;) {
+		unsigned long long hits = thread->samples;
+
+		if (record__mmap_read_all(thread->rec, false) < 0 || terminate)
+			break;
+
+		if (hits == thread->samples) {
+
+			err = fdarray__poll(pollfd, -1);
+			/*
+			 * Propagate error, only if there's any. Ignore positive
+			 * number of returned events and interrupt error.
+			 */
+			if (err > 0 || (err < 0 && errno == EINTR))
+				err = 0;
+			thread->waking++;
+
+			if (fdarray__filter(pollfd, POLLERR | POLLHUP,
+					    record__thread_munmap_filtered, NULL) == 0)
+				break;
+		}
+
+		if (pollfd->entries[ctlfd_pos].revents & POLLHUP) {
+			terminate = true;
+			close(thread->pipes.msg[0]);
+			thread->pipes.msg[0] = -1;
+			pollfd->entries[ctlfd_pos].fd = -1;
+			pollfd->entries[ctlfd_pos].events = 0;
+		}
+
+		pollfd->entries[ctlfd_pos].revents = 0;
+	}
+	record__mmap_read_all(thread->rec, true);
+
+	err = write(thread->pipes.ack[1], &msg, sizeof(msg));
+	if (err == -1)
+		pr_warning("threads[%d]: failed to notify on termination: %s\n",
+			   thread->tid, strerror(errno));
+
+	return NULL;
+}
+
+static void record__init_features(struct record *rec)
+{
+	struct perf_session *session = rec->session;
+	int feat;
+
+	for (feat = HEADER_FIRST_FEATURE; feat < HEADER_LAST_FEATURE; feat++)
+		perf_header__set_feat(&session->header, feat);
+
+	if (rec->no_buildid)
+		perf_header__clear_feat(&session->header, HEADER_BUILD_ID);
+
+#ifdef HAVE_LIBTRACEEVENT
+	if (!have_tracepoints(&rec->evlist->core.entries))
+		perf_header__clear_feat(&session->header, HEADER_TRACING_DATA);
+#endif
+
+	if (!rec->opts.branch_stack)
+		perf_header__clear_feat(&session->header, HEADER_BRANCH_STACK);
+
+	if (!rec->opts.full_auxtrace)
+		perf_header__clear_feat(&session->header, HEADER_AUXTRACE);
+
+	if (!(rec->opts.use_clockid && rec->opts.clockid_res_ns))
+		perf_header__clear_feat(&session->header, HEADER_CLOCKID);
+
+	if (!rec->opts.use_clockid)
+		perf_header__clear_feat(&session->header, HEADER_CLOCK_DATA);
+
+	if (!record__threads_enabled(rec))
+		perf_header__clear_feat(&session->header, HEADER_DIR_FORMAT);
+
+	if (!record__comp_enabled(rec))
+		perf_header__clear_feat(&session->header, HEADER_COMPRESSED);
+
+	perf_header__clear_feat(&session->header, HEADER_STAT);
+}
+
+static void
+record__finish_output(struct record *rec)
+{
+	int i;
+	struct perf_data *data = &rec->data;
+	int fd = perf_data__fd(data);
+
+	if (data->is_pipe)
+		return;
+
+	rec->session->header.data_size += rec->bytes_written;
+	data->file.size = lseek(perf_data__fd(data), 0, SEEK_CUR);
+	if (record__threads_enabled(rec)) {
+		for (i = 0; i < data->dir.nr; i++)
+			data->dir.files[i].size = lseek(data->dir.files[i].fd, 0, SEEK_CUR);
+	}
+
+	if (!rec->no_buildid) {
+		process_buildids(rec);
+
+		if (rec->buildid_all)
+			dsos__hit_all(rec->session);
+	}
+	perf_session__write_header(rec->session, rec->evlist, fd, true);
+
+	return;
+}
+
+static int record__synthesize_workload(struct record *rec, bool tail)
+{
+	int err;
+	struct perf_thread_map *thread_map;
+	bool needs_mmap = rec->opts.synth & PERF_SYNTH_MMAP;
+
+	if (rec->opts.tail_synthesize != tail)
+		return 0;
+
+	thread_map = thread_map__new_by_tid(rec->evlist->workload.pid);
+	if (thread_map == NULL)
+		return -1;
+
+	err = perf_event__synthesize_thread_map(&rec->tool, thread_map,
+						 process_synthesized_event,
+						 &rec->session->machines.host,
+						 needs_mmap,
+						 rec->opts.sample_address);
+	perf_thread_map__put(thread_map);
+	return err;
+}
+
+static int write_finished_init(struct record *rec, bool tail)
+{
+	if (rec->opts.tail_synthesize != tail)
+		return 0;
+
+	return record__write(rec, NULL, &finished_init_event, sizeof(finished_init_event));
+}
+
+static int record__synthesize(struct record *rec, bool tail);
+
+static int
+record__switch_output(struct record *rec, bool at_exit)
+{
+	struct perf_data *data = &rec->data;
+	int fd, err;
+	char *new_filename;
+
+	/* Same Size:      "2015122520103046"*/
+	char timestamp[] = "InvalidTimestamp";
+
+	record__aio_mmap_read_sync(rec);
+
+	write_finished_init(rec, true);
+
+	record__synthesize(rec, true);
+	if (target__none(&rec->opts.target))
+		record__synthesize_workload(rec, true);
+
+	rec->samples = 0;
+	record__finish_output(rec);
+	err = fetch_current_timestamp(timestamp, sizeof(timestamp));
+	if (err) {
+		pr_err("Failed to get current timestamp\n");
+		return -EINVAL;
+	}
+
+	fd = perf_data__switch(data, timestamp,
+				    rec->session->header.data_offset,
+				    at_exit, &new_filename);
+	if (fd >= 0 && !at_exit) {
+		rec->bytes_written = 0;
+		rec->session->header.data_size = 0;
+	}
+
+	if (!quiet)
+		fprintf(stderr, "[ perf record: Dump %s.%s ]\n",
+			data->path, timestamp);
+
+	if (rec->switch_output.num_files) {
+		int n = rec->switch_output.cur_file + 1;
+
+		if (n >= rec->switch_output.num_files)
+			n = 0;
+		rec->switch_output.cur_file = n;
+		if (rec->switch_output.filenames[n]) {
+			remove(rec->switch_output.filenames[n]);
+			zfree(&rec->switch_output.filenames[n]);
+		}
+		rec->switch_output.filenames[n] = new_filename;
+	} else {
+		free(new_filename);
+	}
+
+	/* Output tracking events */
+	if (!at_exit) {
+		record__synthesize(rec, false);
+
+		/*
+		 * In 'perf record --switch-output' without -a,
+		 * record__synthesize() in record__switch_output() won't
+		 * generate tracking events because there's no thread_map
+		 * in evlist. Which causes newly created perf.data doesn't
+		 * contain map and comm information.
+		 * Create a fake thread_map and directly call
+		 * perf_event__synthesize_thread_map() for those events.
+		 */
+		if (target__none(&rec->opts.target))
+			record__synthesize_workload(rec, false);
+		write_finished_init(rec, false);
+	}
+	return fd;
+}
+
+static void __record__save_lost_samples(struct record *rec, struct evsel *evsel,
+					struct perf_record_lost_samples *lost,
+					int cpu_idx, int thread_idx, u64 lost_count,
+					u16 misc_flag)
+{
+	struct perf_sample_id *sid;
+	struct perf_sample sample = {};
+	int id_hdr_size;
+
+	lost->lost = lost_count;
+	if (evsel->core.ids) {
+		sid = xyarray__entry(evsel->core.sample_id, cpu_idx, thread_idx);
+		sample.id = sid->id;
+	}
+
+	id_hdr_size = perf_event__synthesize_id_sample((void *)(lost + 1),
+						       evsel->core.attr.sample_type, &sample);
+	lost->header.size = sizeof(*lost) + id_hdr_size;
+	lost->header.misc = misc_flag;
+	record__write(rec, NULL, lost, lost->header.size);
+}
+
+static void record__read_lost_samples(struct record *rec)
+{
+	struct perf_session *session = rec->session;
+	struct perf_record_lost_samples *lost;
+	struct evsel *evsel;
+
+	/* there was an error during record__open */
+	if (session->evlist == NULL)
+		return;
+
+	lost = zalloc(PERF_SAMPLE_MAX_SIZE);
+	if (lost == NULL) {
+		pr_debug("Memory allocation failed\n");
+		return;
+	}
+
+	lost->header.type = PERF_RECORD_LOST_SAMPLES;
+
+	evlist__for_each_entry(session->evlist, evsel) {
+		struct xyarray *xy = evsel->core.sample_id;
+		u64 lost_count;
+
+		if (xy == NULL || evsel->core.fd == NULL)
+			continue;
+		if (xyarray__max_x(evsel->core.fd) != xyarray__max_x(xy) ||
+		    xyarray__max_y(evsel->core.fd) != xyarray__max_y(xy)) {
+			pr_debug("Unmatched FD vs. sample ID: skip reading LOST count\n");
+			continue;
+		}
+
+		for (int x = 0; x < xyarray__max_x(xy); x++) {
+			for (int y = 0; y < xyarray__max_y(xy); y++) {
+				struct perf_counts_values count;
+
+				if (perf_evsel__read(&evsel->core, x, y, &count) < 0) {
+					pr_debug("read LOST count failed\n");
+					goto out;
+				}
+
+				if (count.lost) {
+					__record__save_lost_samples(rec, evsel, lost,
+								    x, y, count.lost, 0);
+				}
+			}
+		}
+
+		lost_count = perf_bpf_filter__lost_count(evsel);
+		if (lost_count)
+			__record__save_lost_samples(rec, evsel, lost, 0, 0, lost_count,
+						    PERF_RECORD_MISC_LOST_SAMPLES_BPF);
+	}
+out:
+	free(lost);
+}
+
+static volatile sig_atomic_t workload_exec_errno;
+
+/*
+ * evlist__prepare_workload will send a SIGUSR1
+ * if the fork fails, since we asked by setting its
+ * want_signal to true.
+ */
+static void workload_exec_failed_signal(int signo __maybe_unused,
+					siginfo_t *info,
+					void *ucontext __maybe_unused)
+{
+	workload_exec_errno = info->si_value.sival_int;
+	done = 1;
+	child_finished = 1;
+}
+
+static void snapshot_sig_handler(int sig);
+static void alarm_sig_handler(int sig);
+
+static const struct perf_event_mmap_page *evlist__pick_pc(struct evlist *evlist)
+{
+	if (evlist) {
+		if (evlist->mmap && evlist->mmap[0].core.base)
+			return evlist->mmap[0].core.base;
+		if (evlist->overwrite_mmap && evlist->overwrite_mmap[0].core.base)
+			return evlist->overwrite_mmap[0].core.base;
+	}
+	return NULL;
+}
+
+static const struct perf_event_mmap_page *record__pick_pc(struct record *rec)
+{
+	const struct perf_event_mmap_page *pc = evlist__pick_pc(rec->evlist);
+	if (pc)
+		return pc;
+	return NULL;
+}
+
+static int record__synthesize(struct record *rec, bool tail)
+{
+	struct perf_session *session = rec->session;
+	struct machine *machine = &session->machines.host;
+	struct perf_data *data = &rec->data;
+	struct record_opts *opts = &rec->opts;
+	struct perf_tool *tool = &rec->tool;
+	int err = 0;
+	event_op f = process_synthesized_event;
+
+	if (rec->opts.tail_synthesize != tail)
+		return 0;
+
+	if (data->is_pipe) {
+		err = perf_event__synthesize_for_pipe(tool, session, data,
+						      process_synthesized_event);
+		if (err < 0)
+			goto out;
+
+		rec->bytes_written += err;
+	}
+
+	err = perf_event__synth_time_conv(record__pick_pc(rec), tool,
+					  process_synthesized_event, machine);
+	if (err)
+		goto out;
+
+	/* Synthesize id_index before auxtrace_info */
+	err = perf_event__synthesize_id_index(tool,
+					      process_synthesized_event,
+					      session->evlist, machine);
+	if (err)
+		goto out;
+
+	if (rec->opts.full_auxtrace) {
+		err = perf_event__synthesize_auxtrace_info(rec->itr, tool,
+					session, process_synthesized_event);
+		if (err)
+			goto out;
+	}
+
+	if (!evlist__exclude_kernel(rec->evlist)) {
+		err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event,
+							 machine);
+		WARN_ONCE(err < 0, "Couldn't record kernel reference relocation symbol\n"
+				   "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n"
+				   "Check /proc/kallsyms permission or run as root.\n");
+
+		err = perf_event__synthesize_modules(tool, process_synthesized_event,
+						     machine);
+		WARN_ONCE(err < 0, "Couldn't record kernel module information.\n"
+				   "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n"
+				   "Check /proc/modules permission or run as root.\n");
+	}
+
+	if (perf_guest) {
+		machines__process_guests(&session->machines,
+					 perf_event__synthesize_guest_os, tool);
+	}
+
+	err = perf_event__synthesize_extra_attr(&rec->tool,
+						rec->evlist,
+						process_synthesized_event,
+						data->is_pipe);
+	if (err)
+		goto out;
+
+	err = perf_event__synthesize_thread_map2(&rec->tool, rec->evlist->core.threads,
+						 process_synthesized_event,
+						NULL);
+	if (err < 0) {
+		pr_err("Couldn't synthesize thread map.\n");
+		return err;
+	}
+
+	err = perf_event__synthesize_cpu_map(&rec->tool, rec->evlist->core.all_cpus,
+					     process_synthesized_event, NULL);
+	if (err < 0) {
+		pr_err("Couldn't synthesize cpu map.\n");
+		return err;
+	}
+
+	err = perf_event__synthesize_bpf_events(session, process_synthesized_event,
+						machine, opts);
+	if (err < 0) {
+		pr_warning("Couldn't synthesize bpf events.\n");
+		err = 0;
+	}
+
+	if (rec->opts.synth & PERF_SYNTH_CGROUP) {
+		err = perf_event__synthesize_cgroups(tool, process_synthesized_event,
+						     machine);
+		if (err < 0) {
+			pr_warning("Couldn't synthesize cgroup events.\n");
+			err = 0;
+		}
+	}
+
+	if (rec->opts.nr_threads_synthesize > 1) {
+		mutex_init(&synth_lock);
+		perf_set_multithreaded();
+		f = process_locked_synthesized_event;
+	}
+
+	if (rec->opts.synth & PERF_SYNTH_TASK) {
+		bool needs_mmap = rec->opts.synth & PERF_SYNTH_MMAP;
+
+		err = __machine__synthesize_threads(machine, tool, &opts->target,
+						    rec->evlist->core.threads,
+						    f, needs_mmap, opts->sample_address,
+						    rec->opts.nr_threads_synthesize);
+	}
+
+	if (rec->opts.nr_threads_synthesize > 1) {
+		perf_set_singlethreaded();
+		mutex_destroy(&synth_lock);
+	}
+
+out:
+	return err;
+}
+
+static int record__process_signal_event(union perf_event *event __maybe_unused, void *data)
+{
+	struct record *rec = data;
+	pthread_kill(rec->thread_id, SIGUSR2);
+	return 0;
+}
+
+static int record__setup_sb_evlist(struct record *rec)
+{
+	struct record_opts *opts = &rec->opts;
+
+	if (rec->sb_evlist != NULL) {
+		/*
+		 * We get here if --switch-output-event populated the
+		 * sb_evlist, so associate a callback that will send a SIGUSR2
+		 * to the main thread.
+		 */
+		evlist__set_cb(rec->sb_evlist, record__process_signal_event, rec);
+		rec->thread_id = pthread_self();
+	}
+#ifdef HAVE_LIBBPF_SUPPORT
+	if (!opts->no_bpf_event) {
+		if (rec->sb_evlist == NULL) {
+			rec->sb_evlist = evlist__new();
+
+			if (rec->sb_evlist == NULL) {
+				pr_err("Couldn't create side band evlist.\n.");
+				return -1;
+			}
+		}
+
+		if (evlist__add_bpf_sb_event(rec->sb_evlist, &rec->session->header.env)) {
+			pr_err("Couldn't ask for PERF_RECORD_BPF_EVENT side band events.\n.");
+			return -1;
+		}
+	}
+#endif
+	if (evlist__start_sb_thread(rec->sb_evlist, &rec->opts.target)) {
+		pr_debug("Couldn't start the BPF side band thread:\nBPF programs starting from now on won't be annotatable\n");
+		opts->no_bpf_event = true;
+	}
+
+	return 0;
+}
+
+static int record__init_clock(struct record *rec)
+{
+	struct perf_session *session = rec->session;
+	struct timespec ref_clockid;
+	struct timeval ref_tod;
+	u64 ref;
+
+	if (!rec->opts.use_clockid)
+		return 0;
+
+	if (rec->opts.use_clockid && rec->opts.clockid_res_ns)
+		session->header.env.clock.clockid_res_ns = rec->opts.clockid_res_ns;
+
+	session->header.env.clock.clockid = rec->opts.clockid;
+
+	if (gettimeofday(&ref_tod, NULL) != 0) {
+		pr_err("gettimeofday failed, cannot set reference time.\n");
+		return -1;
+	}
+
+	if (clock_gettime(rec->opts.clockid, &ref_clockid)) {
+		pr_err("clock_gettime failed, cannot set reference time.\n");
+		return -1;
+	}
+
+	ref = (u64) ref_tod.tv_sec * NSEC_PER_SEC +
+	      (u64) ref_tod.tv_usec * NSEC_PER_USEC;
+
+	session->header.env.clock.tod_ns = ref;
+
+	ref = (u64) ref_clockid.tv_sec * NSEC_PER_SEC +
+	      (u64) ref_clockid.tv_nsec;
+
+	session->header.env.clock.clockid_ns = ref;
+	return 0;
+}
+
+static void hit_auxtrace_snapshot_trigger(struct record *rec)
+{
+	if (trigger_is_ready(&auxtrace_snapshot_trigger)) {
+		trigger_hit(&auxtrace_snapshot_trigger);
+		auxtrace_record__snapshot_started = 1;
+		if (auxtrace_record__snapshot_start(rec->itr))
+			trigger_error(&auxtrace_snapshot_trigger);
+	}
+}
+
+static void record__uniquify_name(struct record *rec)
+{
+	struct evsel *pos;
+	struct evlist *evlist = rec->evlist;
+	char *new_name;
+	int ret;
+
+	if (perf_pmus__num_core_pmus() == 1)
+		return;
+
+	evlist__for_each_entry(evlist, pos) {
+		if (!evsel__is_hybrid(pos))
+			continue;
+
+		if (strchr(pos->name, '/'))
+			continue;
+
+		ret = asprintf(&new_name, "%s/%s/",
+			       pos->pmu_name, pos->name);
+		if (ret) {
+			free(pos->name);
+			pos->name = new_name;
+		}
+	}
+}
+
+static int record__terminate_thread(struct record_thread *thread_data)
+{
+	int err;
+	enum thread_msg ack = THREAD_MSG__UNDEFINED;
+	pid_t tid = thread_data->tid;
+
+	close(thread_data->pipes.msg[1]);
+	thread_data->pipes.msg[1] = -1;
+	err = read(thread_data->pipes.ack[0], &ack, sizeof(ack));
+	if (err > 0)
+		pr_debug2("threads[%d]: sent %s\n", tid, thread_msg_tags[ack]);
+	else
+		pr_warning("threads[%d]: failed to receive termination notification from %d\n",
+			   thread->tid, tid);
+
+	return 0;
+}
+
+static int record__start_threads(struct record *rec)
+{
+	int t, tt, err, ret = 0, nr_threads = rec->nr_threads;
+	struct record_thread *thread_data = rec->thread_data;
+	sigset_t full, mask;
+	pthread_t handle;
+	pthread_attr_t attrs;
+
+	thread = &thread_data[0];
+
+	if (!record__threads_enabled(rec))
+		return 0;
+
+	sigfillset(&full);
+	if (sigprocmask(SIG_SETMASK, &full, &mask)) {
+		pr_err("Failed to block signals on threads start: %s\n", strerror(errno));
+		return -1;
+	}
+
+	pthread_attr_init(&attrs);
+	pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
+
+	for (t = 1; t < nr_threads; t++) {
+		enum thread_msg msg = THREAD_MSG__UNDEFINED;
+
+#ifdef HAVE_PTHREAD_ATTR_SETAFFINITY_NP
+		pthread_attr_setaffinity_np(&attrs,
+					    MMAP_CPU_MASK_BYTES(&(thread_data[t].mask->affinity)),
+					    (cpu_set_t *)(thread_data[t].mask->affinity.bits));
+#endif
+		if (pthread_create(&handle, &attrs, record__thread, &thread_data[t])) {
+			for (tt = 1; tt < t; tt++)
+				record__terminate_thread(&thread_data[t]);
+			pr_err("Failed to start threads: %s\n", strerror(errno));
+			ret = -1;
+			goto out_err;
+		}
+
+		err = read(thread_data[t].pipes.ack[0], &msg, sizeof(msg));
+		if (err > 0)
+			pr_debug2("threads[%d]: sent %s\n", rec->thread_data[t].tid,
+				  thread_msg_tags[msg]);
+		else
+			pr_warning("threads[%d]: failed to receive start notification from %d\n",
+				   thread->tid, rec->thread_data[t].tid);
+	}
+
+	sched_setaffinity(0, MMAP_CPU_MASK_BYTES(&thread->mask->affinity),
+			(cpu_set_t *)thread->mask->affinity.bits);
+
+	pr_debug("threads[%d]: started on cpu%d\n", thread->tid, sched_getcpu());
+
+out_err:
+	pthread_attr_destroy(&attrs);
+
+	if (sigprocmask(SIG_SETMASK, &mask, NULL)) {
+		pr_err("Failed to unblock signals on threads start: %s\n", strerror(errno));
+		ret = -1;
+	}
+
+	return ret;
+}
+
+static int record__stop_threads(struct record *rec)
+{
+	int t;
+	struct record_thread *thread_data = rec->thread_data;
+
+	for (t = 1; t < rec->nr_threads; t++)
+		record__terminate_thread(&thread_data[t]);
+
+	for (t = 0; t < rec->nr_threads; t++) {
+		rec->samples += thread_data[t].samples;
+		if (!record__threads_enabled(rec))
+			continue;
+		rec->session->bytes_transferred += thread_data[t].bytes_transferred;
+		rec->session->bytes_compressed += thread_data[t].bytes_compressed;
+		pr_debug("threads[%d]: samples=%lld, wakes=%ld, ", thread_data[t].tid,
+			 thread_data[t].samples, thread_data[t].waking);
+		if (thread_data[t].bytes_transferred && thread_data[t].bytes_compressed)
+			pr_debug("transferred=%" PRIu64 ", compressed=%" PRIu64 "\n",
+				 thread_data[t].bytes_transferred, thread_data[t].bytes_compressed);
+		else
+			pr_debug("written=%" PRIu64 "\n", thread_data[t].bytes_written);
+	}
+
+	return 0;
+}
+
+static unsigned long record__waking(struct record *rec)
+{
+	int t;
+	unsigned long waking = 0;
+	struct record_thread *thread_data = rec->thread_data;
+
+	for (t = 0; t < rec->nr_threads; t++)
+		waking += thread_data[t].waking;
+
+	return waking;
+}
+
+static int __cmd_record(struct record *rec, int argc, const char **argv)
+{
+	int err;
+	int status = 0;
+	const bool forks = argc > 0;
+	struct perf_tool *tool = &rec->tool;
+	struct record_opts *opts = &rec->opts;
+	struct perf_data *data = &rec->data;
+	struct perf_session *session;
+	bool disabled = false, draining = false;
+	int fd;
+	float ratio = 0;
+	enum evlist_ctl_cmd cmd = EVLIST_CTL_CMD_UNSUPPORTED;
+
+	atexit(record__sig_exit);
+	signal(SIGCHLD, sig_handler);
+	signal(SIGINT, sig_handler);
+	signal(SIGTERM, sig_handler);
+	signal(SIGSEGV, sigsegv_handler);
+
+	if (rec->opts.record_namespaces)
+		tool->namespace_events = true;
+
+	if (rec->opts.record_cgroup) {
+#ifdef HAVE_FILE_HANDLE
+		tool->cgroup_events = true;
+#else
+		pr_err("cgroup tracking is not supported\n");
+		return -1;
+#endif
+	}
+
+	if (rec->opts.auxtrace_snapshot_mode || rec->switch_output.enabled) {
+		signal(SIGUSR2, snapshot_sig_handler);
+		if (rec->opts.auxtrace_snapshot_mode)
+			trigger_on(&auxtrace_snapshot_trigger);
+		if (rec->switch_output.enabled)
+			trigger_on(&switch_output_trigger);
+	} else {
+		signal(SIGUSR2, SIG_IGN);
+	}
+
+	session = perf_session__new(data, tool);
+	if (IS_ERR(session)) {
+		pr_err("Perf session creation failed.\n");
+		return PTR_ERR(session);
+	}
+
+	if (record__threads_enabled(rec)) {
+		if (perf_data__is_pipe(&rec->data)) {
+			pr_err("Parallel trace streaming is not available in pipe mode.\n");
+			return -1;
+		}
+		if (rec->opts.full_auxtrace) {
+			pr_err("Parallel trace streaming is not available in AUX area tracing mode.\n");
+			return -1;
+		}
+	}
+
+	fd = perf_data__fd(data);
+	rec->session = session;
+
+	if (zstd_init(&session->zstd_data, rec->opts.comp_level) < 0) {
+		pr_err("Compression initialization failed.\n");
+		return -1;
+	}
+#ifdef HAVE_EVENTFD_SUPPORT
+	done_fd = eventfd(0, EFD_NONBLOCK);
+	if (done_fd < 0) {
+		pr_err("Failed to create wakeup eventfd, error: %m\n");
+		status = -1;
+		goto out_delete_session;
+	}
+	err = evlist__add_wakeup_eventfd(rec->evlist, done_fd);
+	if (err < 0) {
+		pr_err("Failed to add wakeup eventfd to poll list\n");
+		status = err;
+		goto out_delete_session;
+	}
+#endif // HAVE_EVENTFD_SUPPORT
+
+	session->header.env.comp_type  = PERF_COMP_ZSTD;
+	session->header.env.comp_level = rec->opts.comp_level;
+
+	if (rec->opts.kcore &&
+	    !record__kcore_readable(&session->machines.host)) {
+		pr_err("ERROR: kcore is not readable.\n");
+		return -1;
+	}
+
+	if (record__init_clock(rec))
+		return -1;
+
+	record__init_features(rec);
+
+	if (forks) {
+		err = evlist__prepare_workload(rec->evlist, &opts->target, argv, data->is_pipe,
+					       workload_exec_failed_signal);
+		if (err < 0) {
+			pr_err("Couldn't run the workload!\n");
+			status = err;
+			goto out_delete_session;
+		}
+	}
+
+	/*
+	 * If we have just single event and are sending data
+	 * through pipe, we need to force the ids allocation,
+	 * because we synthesize event name through the pipe
+	 * and need the id for that.
+	 */
+	if (data->is_pipe && rec->evlist->core.nr_entries == 1)
+		rec->opts.sample_id = true;
+
+	record__uniquify_name(rec);
+
+	/* Debug message used by test scripts */
+	pr_debug3("perf record opening and mmapping events\n");
+	if (record__open(rec) != 0) {
+		err = -1;
+		goto out_free_threads;
+	}
+	/* Debug message used by test scripts */
+	pr_debug3("perf record done opening and mmapping events\n");
+	session->header.env.comp_mmap_len = session->evlist->core.mmap_len;
+
+	if (rec->opts.kcore) {
+		err = record__kcore_copy(&session->machines.host, data);
+		if (err) {
+			pr_err("ERROR: Failed to copy kcore\n");
+			goto out_free_threads;
+		}
+	}
+
+	/*
+	 * Normally perf_session__new would do this, but it doesn't have the
+	 * evlist.
+	 */
+	if (rec->tool.ordered_events && !evlist__sample_id_all(rec->evlist)) {
+		pr_warning("WARNING: No sample_id_all support, falling back to unordered processing\n");
+		rec->tool.ordered_events = false;
+	}
+
+	if (evlist__nr_groups(rec->evlist) == 0)
+		perf_header__clear_feat(&session->header, HEADER_GROUP_DESC);
+
+	if (data->is_pipe) {
+		err = perf_header__write_pipe(fd);
+		if (err < 0)
+			goto out_free_threads;
+	} else {
+		err = perf_session__write_header(session, rec->evlist, fd, false);
+		if (err < 0)
+			goto out_free_threads;
+	}
+
+	err = -1;
+	if (!rec->no_buildid
+	    && !perf_header__has_feat(&session->header, HEADER_BUILD_ID)) {
+		pr_err("Couldn't generate buildids. "
+		       "Use --no-buildid to profile anyway.\n");
+		goto out_free_threads;
+	}
+
+	err = record__setup_sb_evlist(rec);
+	if (err)
+		goto out_free_threads;
+
+	err = record__synthesize(rec, false);
+	if (err < 0)
+		goto out_free_threads;
+
+	if (rec->realtime_prio) {
+		struct sched_param param;
+
+		param.sched_priority = rec->realtime_prio;
+		if (sched_setscheduler(0, SCHED_FIFO, &param)) {
+			pr_err("Could not set realtime priority.\n");
+			err = -1;
+			goto out_free_threads;
+		}
+	}
+
+	if (record__start_threads(rec))
+		goto out_free_threads;
+
+	/*
+	 * When perf is starting the traced process, all the events
+	 * (apart from group members) have enable_on_exec=1 set,
+	 * so don't spoil it by prematurely enabling them.
+	 */
+	if (!target__none(&opts->target) && !opts->target.initial_delay)
+		evlist__enable(rec->evlist);
+
+	/*
+	 * Let the child rip
+	 */
+	if (forks) {
+		struct machine *machine = &session->machines.host;
+		union perf_event *event;
+		pid_t tgid;
+
+		event = malloc(sizeof(event->comm) + machine->id_hdr_size);
+		if (event == NULL) {
+			err = -ENOMEM;
+			goto out_child;
+		}
+
+		/*
+		 * Some H/W events are generated before COMM event
+		 * which is emitted during exec(), so perf script
+		 * cannot see a correct process name for those events.
+		 * Synthesize COMM event to prevent it.
+		 */
+		tgid = perf_event__synthesize_comm(tool, event,
+						   rec->evlist->workload.pid,
+						   process_synthesized_event,
+						   machine);
+		free(event);
+
+		if (tgid == -1)
+			goto out_child;
+
+		event = malloc(sizeof(event->namespaces) +
+			       (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
+			       machine->id_hdr_size);
+		if (event == NULL) {
+			err = -ENOMEM;
+			goto out_child;
+		}
+
+		/*
+		 * Synthesize NAMESPACES event for the command specified.
+		 */
+		perf_event__synthesize_namespaces(tool, event,
+						  rec->evlist->workload.pid,
+						  tgid, process_synthesized_event,
+						  machine);
+		free(event);
+
+		evlist__start_workload(rec->evlist);
+	}
+
+	if (opts->target.initial_delay) {
+		pr_info(EVLIST_DISABLED_MSG);
+		if (opts->target.initial_delay > 0) {
+			usleep(opts->target.initial_delay * USEC_PER_MSEC);
+			evlist__enable(rec->evlist);
+			pr_info(EVLIST_ENABLED_MSG);
+		}
+	}
+
+	err = event_enable_timer__start(rec->evlist->eet);
+	if (err)
+		goto out_child;
+
+	/* Debug message used by test scripts */
+	pr_debug3("perf record has started\n");
+	fflush(stderr);
+
+	trigger_ready(&auxtrace_snapshot_trigger);
+	trigger_ready(&switch_output_trigger);
+	perf_hooks__invoke_record_start();
+
+	/*
+	 * Must write FINISHED_INIT so it will be seen after all other
+	 * synthesized user events, but before any regular events.
+	 */
+	err = write_finished_init(rec, false);
+	if (err < 0)
+		goto out_child;
+
+	for (;;) {
+		unsigned long long hits = thread->samples;
+
+		/*
+		 * rec->evlist->bkw_mmap_state is possible to be
+		 * BKW_MMAP_EMPTY here: when done == true and
+		 * hits != rec->samples in previous round.
+		 *
+		 * evlist__toggle_bkw_mmap ensure we never
+		 * convert BKW_MMAP_EMPTY to BKW_MMAP_DATA_PENDING.
+		 */
+		if (trigger_is_hit(&switch_output_trigger) || done || draining)
+			evlist__toggle_bkw_mmap(rec->evlist, BKW_MMAP_DATA_PENDING);
+
+		if (record__mmap_read_all(rec, false) < 0) {
+			trigger_error(&auxtrace_snapshot_trigger);
+			trigger_error(&switch_output_trigger);
+			err = -1;
+			goto out_child;
+		}
+
+		if (auxtrace_record__snapshot_started) {
+			auxtrace_record__snapshot_started = 0;
+			if (!trigger_is_error(&auxtrace_snapshot_trigger))
+				record__read_auxtrace_snapshot(rec, false);
+			if (trigger_is_error(&auxtrace_snapshot_trigger)) {
+				pr_err("AUX area tracing snapshot failed\n");
+				err = -1;
+				goto out_child;
+			}
+		}
+
+		if (trigger_is_hit(&switch_output_trigger)) {
+			/*
+			 * If switch_output_trigger is hit, the data in
+			 * overwritable ring buffer should have been collected,
+			 * so bkw_mmap_state should be set to BKW_MMAP_EMPTY.
+			 *
+			 * If SIGUSR2 raise after or during record__mmap_read_all(),
+			 * record__mmap_read_all() didn't collect data from
+			 * overwritable ring buffer. Read again.
+			 */
+			if (rec->evlist->bkw_mmap_state == BKW_MMAP_RUNNING)
+				continue;
+			trigger_ready(&switch_output_trigger);
+
+			/*
+			 * Reenable events in overwrite ring buffer after
+			 * record__mmap_read_all(): we should have collected
+			 * data from it.
+			 */
+			evlist__toggle_bkw_mmap(rec->evlist, BKW_MMAP_RUNNING);
+
+			if (!quiet)
+				fprintf(stderr, "[ perf record: dump data: Woken up %ld times ]\n",
+					record__waking(rec));
+			thread->waking = 0;
+			fd = record__switch_output(rec, false);
+			if (fd < 0) {
+				pr_err("Failed to switch to new file\n");
+				trigger_error(&switch_output_trigger);
+				err = fd;
+				goto out_child;
+			}
+
+			/* re-arm the alarm */
+			if (rec->switch_output.time)
+				alarm(rec->switch_output.time);
+		}
+
+		if (hits == thread->samples) {
+			if (done || draining)
+				break;
+			err = fdarray__poll(&thread->pollfd, -1);
+			/*
+			 * Propagate error, only if there's any. Ignore positive
+			 * number of returned events and interrupt error.
+			 */
+			if (err > 0 || (err < 0 && errno == EINTR))
+				err = 0;
+			thread->waking++;
+
+			if (fdarray__filter(&thread->pollfd, POLLERR | POLLHUP,
+					    record__thread_munmap_filtered, NULL) == 0)
+				draining = true;
+
+			err = record__update_evlist_pollfd_from_thread(rec, rec->evlist, thread);
+			if (err)
+				goto out_child;
+		}
+
+		if (evlist__ctlfd_process(rec->evlist, &cmd) > 0) {
+			switch (cmd) {
+			case EVLIST_CTL_CMD_SNAPSHOT:
+				hit_auxtrace_snapshot_trigger(rec);
+				evlist__ctlfd_ack(rec->evlist);
+				break;
+			case EVLIST_CTL_CMD_STOP:
+				done = 1;
+				break;
+			case EVLIST_CTL_CMD_ACK:
+			case EVLIST_CTL_CMD_UNSUPPORTED:
+			case EVLIST_CTL_CMD_ENABLE:
+			case EVLIST_CTL_CMD_DISABLE:
+			case EVLIST_CTL_CMD_EVLIST:
+			case EVLIST_CTL_CMD_PING:
+			default:
+				break;
+			}
+		}
+
+		err = event_enable_timer__process(rec->evlist->eet);
+		if (err < 0)
+			goto out_child;
+		if (err) {
+			err = 0;
+			done = 1;
+		}
+
+		/*
+		 * When perf is starting the traced process, at the end events
+		 * die with the process and we wait for that. Thus no need to
+		 * disable events in this case.
+		 */
+		if (done && !disabled && !target__none(&opts->target)) {
+			trigger_off(&auxtrace_snapshot_trigger);
+			evlist__disable(rec->evlist);
+			disabled = true;
+		}
+	}
+
+	trigger_off(&auxtrace_snapshot_trigger);
+	trigger_off(&switch_output_trigger);
+
+	if (opts->auxtrace_snapshot_on_exit)
+		record__auxtrace_snapshot_exit(rec);
+
+	if (forks && workload_exec_errno) {
+		char msg[STRERR_BUFSIZE], strevsels[2048];
+		const char *emsg = str_error_r(workload_exec_errno, msg, sizeof(msg));
+
+		evlist__scnprintf_evsels(rec->evlist, sizeof(strevsels), strevsels);
+
+		pr_err("Failed to collect '%s' for the '%s' workload: %s\n",
+			strevsels, argv[0], emsg);
+		err = -1;
+		goto out_child;
+	}
+
+	if (!quiet)
+		fprintf(stderr, "[ perf record: Woken up %ld times to write data ]\n",
+			record__waking(rec));
+
+	write_finished_init(rec, true);
+
+	if (target__none(&rec->opts.target))
+		record__synthesize_workload(rec, true);
+
+out_child:
+	record__stop_threads(rec);
+	record__mmap_read_all(rec, true);
+out_free_threads:
+	record__free_thread_data(rec);
+	evlist__finalize_ctlfd(rec->evlist);
+	record__aio_mmap_read_sync(rec);
+
+	if (rec->session->bytes_transferred && rec->session->bytes_compressed) {
+		ratio = (float)rec->session->bytes_transferred/(float)rec->session->bytes_compressed;
+		session->header.env.comp_ratio = ratio + 0.5;
+	}
+
+	if (forks) {
+		int exit_status;
+
+		if (!child_finished)
+			kill(rec->evlist->workload.pid, SIGTERM);
+
+		wait(&exit_status);
+
+		if (err < 0)
+			status = err;
+		else if (WIFEXITED(exit_status))
+			status = WEXITSTATUS(exit_status);
+		else if (WIFSIGNALED(exit_status))
+			signr = WTERMSIG(exit_status);
+	} else
+		status = err;
+
+	if (rec->off_cpu)
+		rec->bytes_written += off_cpu_write(rec->session);
+
+	record__read_lost_samples(rec);
+	record__synthesize(rec, true);
+	/* this will be recalculated during process_buildids() */
+	rec->samples = 0;
+
+	if (!err) {
+		if (!rec->timestamp_filename) {
+			record__finish_output(rec);
+		} else {
+			fd = record__switch_output(rec, true);
+			if (fd < 0) {
+				status = fd;
+				goto out_delete_session;
+			}
+		}
+	}
+
+	perf_hooks__invoke_record_end();
+
+	if (!err && !quiet) {
+		char samples[128];
+		const char *postfix = rec->timestamp_filename ?
+					".<timestamp>" : "";
+
+		if (rec->samples && !rec->opts.full_auxtrace)
+			scnprintf(samples, sizeof(samples),
+				  " (%" PRIu64 " samples)", rec->samples);
+		else
+			samples[0] = '\0';
+
+		fprintf(stderr,	"[ perf record: Captured and wrote %.3f MB %s%s%s",
+			perf_data__size(data) / 1024.0 / 1024.0,
+			data->path, postfix, samples);
+		if (ratio) {
+			fprintf(stderr,	", compressed (original %.3f MB, ratio is %.3f)",
+					rec->session->bytes_transferred / 1024.0 / 1024.0,
+					ratio);
+		}
+		fprintf(stderr, " ]\n");
+	}
+
+out_delete_session:
+#ifdef HAVE_EVENTFD_SUPPORT
+	if (done_fd >= 0) {
+		fd = done_fd;
+		done_fd = -1;
+
+		close(fd);
+	}
+#endif
+	zstd_fini(&session->zstd_data);
+	perf_session__delete(session);
+
+	if (!opts->no_bpf_event)
+		evlist__stop_sb_thread(rec->sb_evlist);
+	return status;
+}
+
+static void callchain_debug(struct callchain_param *callchain)
+{
+	static const char *str[CALLCHAIN_MAX] = { "NONE", "FP", "DWARF", "LBR" };
+
+	pr_debug("callchain: type %s\n", str[callchain->record_mode]);
+
+	if (callchain->record_mode == CALLCHAIN_DWARF)
+		pr_debug("callchain: stack dump size %d\n",
+			 callchain->dump_size);
+}
+
+int record_opts__parse_callchain(struct record_opts *record,
+				 struct callchain_param *callchain,
+				 const char *arg, bool unset)
+{
+	int ret;
+	callchain->enabled = !unset;
+
+	/* --no-call-graph */
+	if (unset) {
+		callchain->record_mode = CALLCHAIN_NONE;
+		pr_debug("callchain: disabled\n");
+		return 0;
+	}
+
+	ret = parse_callchain_record_opt(arg, callchain);
+	if (!ret) {
+		/* Enable data address sampling for DWARF unwind. */
+		if (callchain->record_mode == CALLCHAIN_DWARF)
+			record->sample_address = true;
+		callchain_debug(callchain);
+	}
+
+	return ret;
+}
+
+int record_parse_callchain_opt(const struct option *opt,
+			       const char *arg,
+			       int unset)
+{
+	return record_opts__parse_callchain(opt->value, &callchain_param, arg, unset);
+}
+
+int record_callchain_opt(const struct option *opt,
+			 const char *arg __maybe_unused,
+			 int unset __maybe_unused)
+{
+	struct callchain_param *callchain = opt->value;
+
+	callchain->enabled = true;
+
+	if (callchain->record_mode == CALLCHAIN_NONE)
+		callchain->record_mode = CALLCHAIN_FP;
+
+	callchain_debug(callchain);
+	return 0;
+}
+
+static int perf_record_config(const char *var, const char *value, void *cb)
+{
+	struct record *rec = cb;
+
+	if (!strcmp(var, "record.build-id")) {
+		if (!strcmp(value, "cache"))
+			rec->no_buildid_cache = false;
+		else if (!strcmp(value, "no-cache"))
+			rec->no_buildid_cache = true;
+		else if (!strcmp(value, "skip"))
+			rec->no_buildid = true;
+		else if (!strcmp(value, "mmap"))
+			rec->buildid_mmap = true;
+		else
+			return -1;
+		return 0;
+	}
+	if (!strcmp(var, "record.call-graph")) {
+		var = "call-graph.record-mode";
+		return perf_default_config(var, value, cb);
+	}
+#ifdef HAVE_AIO_SUPPORT
+	if (!strcmp(var, "record.aio")) {
+		rec->opts.nr_cblocks = strtol(value, NULL, 0);
+		if (!rec->opts.nr_cblocks)
+			rec->opts.nr_cblocks = nr_cblocks_default;
+	}
+#endif
+	if (!strcmp(var, "record.debuginfod")) {
+		rec->debuginfod.urls = strdup(value);
+		if (!rec->debuginfod.urls)
+			return -ENOMEM;
+		rec->debuginfod.set = true;
+	}
+
+	return 0;
+}
+
+static int record__parse_event_enable_time(const struct option *opt, const char *str, int unset)
+{
+	struct record *rec = (struct record *)opt->value;
+
+	return evlist__parse_event_enable_time(rec->evlist, &rec->opts, str, unset);
+}
+
+static int record__parse_affinity(const struct option *opt, const char *str, int unset)
+{
+	struct record_opts *opts = (struct record_opts *)opt->value;
+
+	if (unset || !str)
+		return 0;
+
+	if (!strcasecmp(str, "node"))
+		opts->affinity = PERF_AFFINITY_NODE;
+	else if (!strcasecmp(str, "cpu"))
+		opts->affinity = PERF_AFFINITY_CPU;
+
+	return 0;
+}
+
+static int record__mmap_cpu_mask_alloc(struct mmap_cpu_mask *mask, int nr_bits)
+{
+	mask->nbits = nr_bits;
+	mask->bits = bitmap_zalloc(mask->nbits);
+	if (!mask->bits)
+		return -ENOMEM;
+
+	return 0;
+}
+
+static void record__mmap_cpu_mask_free(struct mmap_cpu_mask *mask)
+{
+	bitmap_free(mask->bits);
+	mask->nbits = 0;
+}
+
+static int record__thread_mask_alloc(struct thread_mask *mask, int nr_bits)
+{
+	int ret;
+
+	ret = record__mmap_cpu_mask_alloc(&mask->maps, nr_bits);
+	if (ret) {
+		mask->affinity.bits = NULL;
+		return ret;
+	}
+
+	ret = record__mmap_cpu_mask_alloc(&mask->affinity, nr_bits);
+	if (ret) {
+		record__mmap_cpu_mask_free(&mask->maps);
+		mask->maps.bits = NULL;
+	}
+
+	return ret;
+}
+
+static void record__thread_mask_free(struct thread_mask *mask)
+{
+	record__mmap_cpu_mask_free(&mask->maps);
+	record__mmap_cpu_mask_free(&mask->affinity);
+}
+
+static int record__parse_threads(const struct option *opt, const char *str, int unset)
+{
+	int s;
+	struct record_opts *opts = opt->value;
+
+	if (unset || !str || !strlen(str)) {
+		opts->threads_spec = THREAD_SPEC__CPU;
+	} else {
+		for (s = 1; s < THREAD_SPEC__MAX; s++) {
+			if (s == THREAD_SPEC__USER) {
+				opts->threads_user_spec = strdup(str);
+				if (!opts->threads_user_spec)
+					return -ENOMEM;
+				opts->threads_spec = THREAD_SPEC__USER;
+				break;
+			}
+			if (!strncasecmp(str, thread_spec_tags[s], strlen(thread_spec_tags[s]))) {
+				opts->threads_spec = s;
+				break;
+			}
+		}
+	}
+
+	if (opts->threads_spec == THREAD_SPEC__USER)
+		pr_debug("threads_spec: %s\n", opts->threads_user_spec);
+	else
+		pr_debug("threads_spec: %s\n", thread_spec_tags[opts->threads_spec]);
+
+	return 0;
+}
+
+static int parse_output_max_size(const struct option *opt,
+				 const char *str, int unset)
+{
+	unsigned long *s = (unsigned long *)opt->value;
+	static struct parse_tag tags_size[] = {
+		{ .tag  = 'B', .mult = 1       },
+		{ .tag  = 'K', .mult = 1 << 10 },
+		{ .tag  = 'M', .mult = 1 << 20 },
+		{ .tag  = 'G', .mult = 1 << 30 },
+		{ .tag  = 0 },
+	};
+	unsigned long val;
+
+	if (unset) {
+		*s = 0;
+		return 0;
+	}
+
+	val = parse_tag_value(str, tags_size);
+	if (val != (unsigned long) -1) {
+		*s = val;
+		return 0;
+	}
+
+	return -1;
+}
+
+static int record__parse_mmap_pages(const struct option *opt,
+				    const char *str,
+				    int unset __maybe_unused)
+{
+	struct record_opts *opts = opt->value;
+	char *s, *p;
+	unsigned int mmap_pages;
+	int ret;
+
+	if (!str)
+		return -EINVAL;
+
+	s = strdup(str);
+	if (!s)
+		return -ENOMEM;
+
+	p = strchr(s, ',');
+	if (p)
+		*p = '\0';
+
+	if (*s) {
+		ret = __evlist__parse_mmap_pages(&mmap_pages, s);
+		if (ret)
+			goto out_free;
+		opts->mmap_pages = mmap_pages;
+	}
+
+	if (!p) {
+		ret = 0;
+		goto out_free;
+	}
+
+	ret = __evlist__parse_mmap_pages(&mmap_pages, p + 1);
+	if (ret)
+		goto out_free;
+
+	opts->auxtrace_mmap_pages = mmap_pages;
+
+out_free:
+	free(s);
+	return ret;
+}
+
+void __weak arch__add_leaf_frame_record_opts(struct record_opts *opts __maybe_unused)
+{
+}
+
+static int parse_control_option(const struct option *opt,
+				const char *str,
+				int unset __maybe_unused)
+{
+	struct record_opts *opts = opt->value;
+
+	return evlist__parse_control(str, &opts->ctl_fd, &opts->ctl_fd_ack, &opts->ctl_fd_close);
+}
+
+static void switch_output_size_warn(struct record *rec)
+{
+	u64 wakeup_size = evlist__mmap_size(rec->opts.mmap_pages);
+	struct switch_output *s = &rec->switch_output;
+
+	wakeup_size /= 2;
+
+	if (s->size < wakeup_size) {
+		char buf[100];
+
+		unit_number__scnprintf(buf, sizeof(buf), wakeup_size);
+		pr_warning("WARNING: switch-output data size lower than "
+			   "wakeup kernel buffer size (%s) "
+			   "expect bigger perf.data sizes\n", buf);
+	}
+}
+
+static int switch_output_setup(struct record *rec)
+{
+	struct switch_output *s = &rec->switch_output;
+	static struct parse_tag tags_size[] = {
+		{ .tag  = 'B', .mult = 1       },
+		{ .tag  = 'K', .mult = 1 << 10 },
+		{ .tag  = 'M', .mult = 1 << 20 },
+		{ .tag  = 'G', .mult = 1 << 30 },
+		{ .tag  = 0 },
+	};
+	static struct parse_tag tags_time[] = {
+		{ .tag  = 's', .mult = 1        },
+		{ .tag  = 'm', .mult = 60       },
+		{ .tag  = 'h', .mult = 60*60    },
+		{ .tag  = 'd', .mult = 60*60*24 },
+		{ .tag  = 0 },
+	};
+	unsigned long val;
+
+	/*
+	 * If we're using --switch-output-events, then we imply its 
+	 * --switch-output=signal, as we'll send a SIGUSR2 from the side band
+	 *  thread to its parent.
+	 */
+	if (rec->switch_output_event_set) {
+		if (record__threads_enabled(rec)) {
+			pr_warning("WARNING: --switch-output-event option is not available in parallel streaming mode.\n");
+			return 0;
+		}
+		goto do_signal;
+	}
+
+	if (!s->set)
+		return 0;
+
+	if (record__threads_enabled(rec)) {
+		pr_warning("WARNING: --switch-output option is not available in parallel streaming mode.\n");
+		return 0;
+	}
+
+	if (!strcmp(s->str, "signal")) {
+do_signal:
+		s->signal = true;
+		pr_debug("switch-output with SIGUSR2 signal\n");
+		goto enabled;
+	}
+
+	val = parse_tag_value(s->str, tags_size);
+	if (val != (unsigned long) -1) {
+		s->size = val;
+		pr_debug("switch-output with %s size threshold\n", s->str);
+		goto enabled;
+	}
+
+	val = parse_tag_value(s->str, tags_time);
+	if (val != (unsigned long) -1) {
+		s->time = val;
+		pr_debug("switch-output with %s time threshold (%lu seconds)\n",
+			 s->str, s->time);
+		goto enabled;
+	}
+
+	return -1;
+
+enabled:
+	rec->timestamp_filename = true;
+	s->enabled              = true;
+
+	if (s->size && !rec->opts.no_buffering)
+		switch_output_size_warn(rec);
+
+	return 0;
+}
+
+static const char * const __record_usage[] = {
+	"perf record [<options>] [<command>]",
+	"perf record [<options>] -- <command> [<options>]",
+	NULL
+};
+const char * const *record_usage = __record_usage;
+
+static int build_id__process_mmap(struct perf_tool *tool, union perf_event *event,
+				  struct perf_sample *sample, struct machine *machine)
+{
+	/*
+	 * We already have the kernel maps, put in place via perf_session__create_kernel_maps()
+	 * no need to add them twice.
+	 */
+	if (!(event->header.misc & PERF_RECORD_MISC_USER))
+		return 0;
+	return perf_event__process_mmap(tool, event, sample, machine);
+}
+
+static int build_id__process_mmap2(struct perf_tool *tool, union perf_event *event,
+				   struct perf_sample *sample, struct machine *machine)
+{
+	/*
+	 * We already have the kernel maps, put in place via perf_session__create_kernel_maps()
+	 * no need to add them twice.
+	 */
+	if (!(event->header.misc & PERF_RECORD_MISC_USER))
+		return 0;
+
+	return perf_event__process_mmap2(tool, event, sample, machine);
+}
+
+static int process_timestamp_boundary(struct perf_tool *tool,
+				      union perf_event *event __maybe_unused,
+				      struct perf_sample *sample,
+				      struct machine *machine __maybe_unused)
+{
+	struct record *rec = container_of(tool, struct record, tool);
+
+	set_timestamp_boundary(rec, sample->time);
+	return 0;
+}
+
+static int parse_record_synth_option(const struct option *opt,
+				     const char *str,
+				     int unset __maybe_unused)
+{
+	struct record_opts *opts = opt->value;
+	char *p = strdup(str);
+
+	if (p == NULL)
+		return -1;
+
+	opts->synth = parse_synth_opt(p);
+	free(p);
+
+	if (opts->synth < 0) {
+		pr_err("Invalid synth option: %s\n", str);
+		return -1;
+	}
+	return 0;
+}
+
+/*
+ * XXX Ideally would be local to cmd_record() and passed to a record__new
+ * because we need to have access to it in record__exit, that is called
+ * after cmd_record() exits, but since record_options need to be accessible to
+ * builtin-script, leave it here.
+ *
+ * At least we don't ouch it in all the other functions here directly.
+ *
+ * Just say no to tons of global variables, sigh.
+ */
+static struct record record = {
+	.opts = {
+		.sample_time	     = true,
+		.mmap_pages	     = UINT_MAX,
+		.user_freq	     = UINT_MAX,
+		.user_interval	     = ULLONG_MAX,
+		.freq		     = 4000,
+		.target		     = {
+			.uses_mmap   = true,
+			.default_per_cpu = true,
+		},
+		.mmap_flush          = MMAP_FLUSH_DEFAULT,
+		.nr_threads_synthesize = 1,
+		.ctl_fd              = -1,
+		.ctl_fd_ack          = -1,
+		.synth               = PERF_SYNTH_ALL,
+	},
+	.tool = {
+		.sample		= process_sample_event,
+		.fork		= perf_event__process_fork,
+		.exit		= perf_event__process_exit,
+		.comm		= perf_event__process_comm,
+		.namespaces	= perf_event__process_namespaces,
+		.mmap		= build_id__process_mmap,
+		.mmap2		= build_id__process_mmap2,
+		.itrace_start	= process_timestamp_boundary,
+		.aux		= process_timestamp_boundary,
+		.ordered_events	= true,
+	},
+};
+
+const char record_callchain_help[] = CALLCHAIN_RECORD_HELP
+	"\n\t\t\t\tDefault: fp";
+
+static bool dry_run;
+
+static struct parse_events_option_args parse_events_option_args = {
+	.evlistp = &record.evlist,
+};
+
+static struct parse_events_option_args switch_output_parse_events_option_args = {
+	.evlistp = &record.sb_evlist,
+};
+
+/*
+ * XXX Will stay a global variable till we fix builtin-script.c to stop messing
+ * with it and switch to use the library functions in perf_evlist that came
+ * from builtin-record.c, i.e. use record_opts,
+ * evlist__prepare_workload, etc instead of fork+exec'in 'perf record',
+ * using pipes, etc.
+ */
+static struct option __record_options[] = {
+	OPT_CALLBACK('e', "event", &parse_events_option_args, "event",
+		     "event selector. use 'perf list' to list available events",
+		     parse_events_option),
+	OPT_CALLBACK(0, "filter", &record.evlist, "filter",
+		     "event filter", parse_filter),
+	OPT_CALLBACK_NOOPT(0, "exclude-perf", &record.evlist,
+			   NULL, "don't record events from perf itself",
+			   exclude_perf),
+	OPT_STRING('p', "pid", &record.opts.target.pid, "pid",
+		    "record events on existing process id"),
+	OPT_STRING('t', "tid", &record.opts.target.tid, "tid",
+		    "record events on existing thread id"),
+	OPT_INTEGER('r', "realtime", &record.realtime_prio,
+		    "collect data with this RT SCHED_FIFO priority"),
+	OPT_BOOLEAN(0, "no-buffering", &record.opts.no_buffering,
+		    "collect data without buffering"),
+	OPT_BOOLEAN('R', "raw-samples", &record.opts.raw_samples,
+		    "collect raw sample records from all opened counters"),
+	OPT_BOOLEAN('a', "all-cpus", &record.opts.target.system_wide,
+			    "system-wide collection from all CPUs"),
+	OPT_STRING('C', "cpu", &record.opts.target.cpu_list, "cpu",
+		    "list of cpus to monitor"),
+	OPT_U64('c', "count", &record.opts.user_interval, "event period to sample"),
+	OPT_STRING('o', "output", &record.data.path, "file",
+		    "output file name"),
+	OPT_BOOLEAN_SET('i', "no-inherit", &record.opts.no_inherit,
+			&record.opts.no_inherit_set,
+			"child tasks do not inherit counters"),
+	OPT_BOOLEAN(0, "tail-synthesize", &record.opts.tail_synthesize,
+		    "synthesize non-sample events at the end of output"),
+	OPT_BOOLEAN(0, "overwrite", &record.opts.overwrite, "use overwrite mode"),
+	OPT_BOOLEAN(0, "no-bpf-event", &record.opts.no_bpf_event, "do not record bpf events"),
+	OPT_BOOLEAN(0, "strict-freq", &record.opts.strict_freq,
+		    "Fail if the specified frequency can't be used"),
+	OPT_CALLBACK('F', "freq", &record.opts, "freq or 'max'",
+		     "profile at this frequency",
+		      record__parse_freq),
+	OPT_CALLBACK('m', "mmap-pages", &record.opts, "pages[,pages]",
+		     "number of mmap data pages and AUX area tracing mmap pages",
+		     record__parse_mmap_pages),
+	OPT_CALLBACK(0, "mmap-flush", &record.opts, "number",
+		     "Minimal number of bytes that is extracted from mmap data pages (default: 1)",
+		     record__mmap_flush_parse),
+	OPT_CALLBACK_NOOPT('g', NULL, &callchain_param,
+			   NULL, "enables call-graph recording" ,
+			   &record_callchain_opt),
+	OPT_CALLBACK(0, "call-graph", &record.opts,
+		     "record_mode[,record_size]", record_callchain_help,
+		     &record_parse_callchain_opt),
+	OPT_INCR('v', "verbose", &verbose,
+		    "be more verbose (show counter open errors, etc)"),
+	OPT_BOOLEAN('q', "quiet", &quiet, "don't print any warnings or messages"),
+	OPT_BOOLEAN('s', "stat", &record.opts.inherit_stat,
+		    "per thread counts"),
+	OPT_BOOLEAN('d', "data", &record.opts.sample_address, "Record the sample addresses"),
+	OPT_BOOLEAN(0, "phys-data", &record.opts.sample_phys_addr,
+		    "Record the sample physical addresses"),
+	OPT_BOOLEAN(0, "data-page-size", &record.opts.sample_data_page_size,
+		    "Record the sampled data address data page size"),
+	OPT_BOOLEAN(0, "code-page-size", &record.opts.sample_code_page_size,
+		    "Record the sampled code address (ip) page size"),
+	OPT_BOOLEAN(0, "sample-cpu", &record.opts.sample_cpu, "Record the sample cpu"),
+	OPT_BOOLEAN(0, "sample-identifier", &record.opts.sample_identifier,
+		    "Record the sample identifier"),
+	OPT_BOOLEAN_SET('T', "timestamp", &record.opts.sample_time,
+			&record.opts.sample_time_set,
+			"Record the sample timestamps"),
+	OPT_BOOLEAN_SET('P', "period", &record.opts.period, &record.opts.period_set,
+			"Record the sample period"),
+	OPT_BOOLEAN('n', "no-samples", &record.opts.no_samples,
+		    "don't sample"),
+	OPT_BOOLEAN_SET('N', "no-buildid-cache", &record.no_buildid_cache,
+			&record.no_buildid_cache_set,
+			"do not update the buildid cache"),
+	OPT_BOOLEAN_SET('B', "no-buildid", &record.no_buildid,
+			&record.no_buildid_set,
+			"do not collect buildids in perf.data"),
+	OPT_CALLBACK('G', "cgroup", &record.evlist, "name",
+		     "monitor event in cgroup name only",
+		     parse_cgroups),
+	OPT_CALLBACK('D', "delay", &record, "ms",
+		     "ms to wait before starting measurement after program start (-1: start with events disabled), "
+		     "or ranges of time to enable events e.g. '-D 10-20,30-40'",
+		     record__parse_event_enable_time),
+	OPT_BOOLEAN(0, "kcore", &record.opts.kcore, "copy /proc/kcore"),
+	OPT_STRING('u', "uid", &record.opts.target.uid_str, "user",
+		   "user to profile"),
+
+	OPT_CALLBACK_NOOPT('b', "branch-any", &record.opts.branch_stack,
+		     "branch any", "sample any taken branches",
+		     parse_branch_stack),
+
+	OPT_CALLBACK('j', "branch-filter", &record.opts.branch_stack,
+		     "branch filter mask", "branch stack filter modes",
+		     parse_branch_stack),
+	OPT_BOOLEAN('W', "weight", &record.opts.sample_weight,
+		    "sample by weight (on special events only)"),
+	OPT_BOOLEAN(0, "transaction", &record.opts.sample_transaction,
+		    "sample transaction flags (special events only)"),
+	OPT_BOOLEAN(0, "per-thread", &record.opts.target.per_thread,
+		    "use per-thread mmaps"),
+	OPT_CALLBACK_OPTARG('I', "intr-regs", &record.opts.sample_intr_regs, NULL, "any register",
+		    "sample selected machine registers on interrupt,"
+		    " use '-I?' to list register names", parse_intr_regs),
+	OPT_CALLBACK_OPTARG(0, "user-regs", &record.opts.sample_user_regs, NULL, "any register",
+		    "sample selected machine registers on interrupt,"
+		    " use '--user-regs=?' to list register names", parse_user_regs),
+	OPT_BOOLEAN(0, "running-time", &record.opts.running_time,
+		    "Record running/enabled time of read (:S) events"),
+	OPT_CALLBACK('k', "clockid", &record.opts,
+	"clockid", "clockid to use for events, see clock_gettime()",
+	parse_clockid),
+	OPT_STRING_OPTARG('S', "snapshot", &record.opts.auxtrace_snapshot_opts,
+			  "opts", "AUX area tracing Snapshot Mode", ""),
+	OPT_STRING_OPTARG(0, "aux-sample", &record.opts.auxtrace_sample_opts,
+			  "opts", "sample AUX area", ""),
+	OPT_UINTEGER(0, "proc-map-timeout", &proc_map_timeout,
+			"per thread proc mmap processing timeout in ms"),
+	OPT_BOOLEAN(0, "namespaces", &record.opts.record_namespaces,
+		    "Record namespaces events"),
+	OPT_BOOLEAN(0, "all-cgroups", &record.opts.record_cgroup,
+		    "Record cgroup events"),
+	OPT_BOOLEAN_SET(0, "switch-events", &record.opts.record_switch_events,
+			&record.opts.record_switch_events_set,
+			"Record context switch events"),
+	OPT_BOOLEAN_FLAG(0, "all-kernel", &record.opts.all_kernel,
+			 "Configure all used events to run in kernel space.",
+			 PARSE_OPT_EXCLUSIVE),
+	OPT_BOOLEAN_FLAG(0, "all-user", &record.opts.all_user,
+			 "Configure all used events to run in user space.",
+			 PARSE_OPT_EXCLUSIVE),
+	OPT_BOOLEAN(0, "kernel-callchains", &record.opts.kernel_callchains,
+		    "collect kernel callchains"),
+	OPT_BOOLEAN(0, "user-callchains", &record.opts.user_callchains,
+		    "collect user callchains"),
+	OPT_STRING(0, "vmlinux", &symbol_conf.vmlinux_name,
+		   "file", "vmlinux pathname"),
+	OPT_BOOLEAN(0, "buildid-all", &record.buildid_all,
+		    "Record build-id of all DSOs regardless of hits"),
+	OPT_BOOLEAN(0, "buildid-mmap", &record.buildid_mmap,
+		    "Record build-id in map events"),
+	OPT_BOOLEAN(0, "timestamp-filename", &record.timestamp_filename,
+		    "append timestamp to output filename"),
+	OPT_BOOLEAN(0, "timestamp-boundary", &record.timestamp_boundary,
+		    "Record timestamp boundary (time of first/last samples)"),
+	OPT_STRING_OPTARG_SET(0, "switch-output", &record.switch_output.str,
+			  &record.switch_output.set, "signal or size[BKMG] or time[smhd]",
+			  "Switch output when receiving SIGUSR2 (signal) or cross a size or time threshold",
+			  "signal"),
+	OPT_CALLBACK_SET(0, "switch-output-event", &switch_output_parse_events_option_args,
+			 &record.switch_output_event_set, "switch output event",
+			 "switch output event selector. use 'perf list' to list available events",
+			 parse_events_option_new_evlist),
+	OPT_INTEGER(0, "switch-max-files", &record.switch_output.num_files,
+		   "Limit number of switch output generated files"),
+	OPT_BOOLEAN(0, "dry-run", &dry_run,
+		    "Parse options then exit"),
+#ifdef HAVE_AIO_SUPPORT
+	OPT_CALLBACK_OPTARG(0, "aio", &record.opts,
+		     &nr_cblocks_default, "n", "Use <n> control blocks in asynchronous trace writing mode (default: 1, max: 4)",
+		     record__aio_parse),
+#endif
+	OPT_CALLBACK(0, "affinity", &record.opts, "node|cpu",
+		     "Set affinity mask of trace reading thread to NUMA node cpu mask or cpu of processed mmap buffer",
+		     record__parse_affinity),
+#ifdef HAVE_ZSTD_SUPPORT
+	OPT_CALLBACK_OPTARG('z', "compression-level", &record.opts, &comp_level_default, "n",
+			    "Compress records using specified level (default: 1 - fastest compression, 22 - greatest compression)",
+			    record__parse_comp_level),
+#endif
+	OPT_CALLBACK(0, "max-size", &record.output_max_size,
+		     "size", "Limit the maximum size of the output file", parse_output_max_size),
+	OPT_UINTEGER(0, "num-thread-synthesize",
+		     &record.opts.nr_threads_synthesize,
+		     "number of threads to run for event synthesis"),
+#ifdef HAVE_LIBPFM
+	OPT_CALLBACK(0, "pfm-events", &record.evlist, "event",
+		"libpfm4 event selector. use 'perf list' to list available events",
+		parse_libpfm_events_option),
+#endif
+	OPT_CALLBACK(0, "control", &record.opts, "fd:ctl-fd[,ack-fd] or fifo:ctl-fifo[,ack-fifo]",
+		     "Listen on ctl-fd descriptor for command to control measurement ('enable': enable events, 'disable': disable events,\n"
+		     "\t\t\t  'snapshot': AUX area tracing snapshot).\n"
+		     "\t\t\t  Optionally send control command completion ('ack\\n') to ack-fd descriptor.\n"
+		     "\t\t\t  Alternatively, ctl-fifo / ack-fifo will be opened and used as ctl-fd / ack-fd.",
+		      parse_control_option),
+	OPT_CALLBACK(0, "synth", &record.opts, "no|all|task|mmap|cgroup",
+		     "Fine-tune event synthesis: default=all", parse_record_synth_option),
+	OPT_STRING_OPTARG_SET(0, "debuginfod", &record.debuginfod.urls,
+			  &record.debuginfod.set, "debuginfod urls",
+			  "Enable debuginfod data retrieval from DEBUGINFOD_URLS or specified urls",
+			  "system"),
+	OPT_CALLBACK_OPTARG(0, "threads", &record.opts, NULL, "spec",
+			    "write collected trace data into several data files using parallel threads",
+			    record__parse_threads),
+	OPT_BOOLEAN(0, "off-cpu", &record.off_cpu, "Enable off-cpu analysis"),
+	OPT_END()
+};
+
+struct option *record_options = __record_options;
+
+static int record__mmap_cpu_mask_init(struct mmap_cpu_mask *mask, struct perf_cpu_map *cpus)
+{
+	struct perf_cpu cpu;
+	int idx;
+
+	if (cpu_map__is_dummy(cpus))
+		return 0;
+
+	perf_cpu_map__for_each_cpu(cpu, idx, cpus) {
+		if (cpu.cpu == -1)
+			continue;
+		/* Return ENODEV is input cpu is greater than max cpu */
+		if ((unsigned long)cpu.cpu > mask->nbits)
+			return -ENODEV;
+		__set_bit(cpu.cpu, mask->bits);
+	}
+
+	return 0;
+}
+
+static int record__mmap_cpu_mask_init_spec(struct mmap_cpu_mask *mask, const char *mask_spec)
+{
+	struct perf_cpu_map *cpus;
+
+	cpus = perf_cpu_map__new(mask_spec);
+	if (!cpus)
+		return -ENOMEM;
+
+	bitmap_zero(mask->bits, mask->nbits);
+	if (record__mmap_cpu_mask_init(mask, cpus))
+		return -ENODEV;
+
+	perf_cpu_map__put(cpus);
+
+	return 0;
+}
+
+static void record__free_thread_masks(struct record *rec, int nr_threads)
+{
+	int t;
+
+	if (rec->thread_masks)
+		for (t = 0; t < nr_threads; t++)
+			record__thread_mask_free(&rec->thread_masks[t]);
+
+	zfree(&rec->thread_masks);
+}
+
+static int record__alloc_thread_masks(struct record *rec, int nr_threads, int nr_bits)
+{
+	int t, ret;
+
+	rec->thread_masks = zalloc(nr_threads * sizeof(*(rec->thread_masks)));
+	if (!rec->thread_masks) {
+		pr_err("Failed to allocate thread masks\n");
+		return -ENOMEM;
+	}
+
+	for (t = 0; t < nr_threads; t++) {
+		ret = record__thread_mask_alloc(&rec->thread_masks[t], nr_bits);
+		if (ret) {
+			pr_err("Failed to allocate thread masks[%d]\n", t);
+			goto out_free;
+		}
+	}
+
+	return 0;
+
+out_free:
+	record__free_thread_masks(rec, nr_threads);
+
+	return ret;
+}
+
+static int record__init_thread_cpu_masks(struct record *rec, struct perf_cpu_map *cpus)
+{
+	int t, ret, nr_cpus = perf_cpu_map__nr(cpus);
+
+	ret = record__alloc_thread_masks(rec, nr_cpus, cpu__max_cpu().cpu);
+	if (ret)
+		return ret;
+
+	rec->nr_threads = nr_cpus;
+	pr_debug("nr_threads: %d\n", rec->nr_threads);
+
+	for (t = 0; t < rec->nr_threads; t++) {
+		__set_bit(perf_cpu_map__cpu(cpus, t).cpu, rec->thread_masks[t].maps.bits);
+		__set_bit(perf_cpu_map__cpu(cpus, t).cpu, rec->thread_masks[t].affinity.bits);
+		if (verbose > 0) {
+			pr_debug("thread_masks[%d]: ", t);
+			mmap_cpu_mask__scnprintf(&rec->thread_masks[t].maps, "maps");
+			pr_debug("thread_masks[%d]: ", t);
+			mmap_cpu_mask__scnprintf(&rec->thread_masks[t].affinity, "affinity");
+		}
+	}
+
+	return 0;
+}
+
+static int record__init_thread_masks_spec(struct record *rec, struct perf_cpu_map *cpus,
+					  const char **maps_spec, const char **affinity_spec,
+					  u32 nr_spec)
+{
+	u32 s;
+	int ret = 0, t = 0;
+	struct mmap_cpu_mask cpus_mask;
+	struct thread_mask thread_mask, full_mask, *thread_masks;
+
+	ret = record__mmap_cpu_mask_alloc(&cpus_mask, cpu__max_cpu().cpu);
+	if (ret) {
+		pr_err("Failed to allocate CPUs mask\n");
+		return ret;
+	}
+
+	ret = record__mmap_cpu_mask_init(&cpus_mask, cpus);
+	if (ret) {
+		pr_err("Failed to init cpu mask\n");
+		goto out_free_cpu_mask;
+	}
+
+	ret = record__thread_mask_alloc(&full_mask, cpu__max_cpu().cpu);
+	if (ret) {
+		pr_err("Failed to allocate full mask\n");
+		goto out_free_cpu_mask;
+	}
+
+	ret = record__thread_mask_alloc(&thread_mask, cpu__max_cpu().cpu);
+	if (ret) {
+		pr_err("Failed to allocate thread mask\n");
+		goto out_free_full_and_cpu_masks;
+	}
+
+	for (s = 0; s < nr_spec; s++) {
+		ret = record__mmap_cpu_mask_init_spec(&thread_mask.maps, maps_spec[s]);
+		if (ret) {
+			pr_err("Failed to initialize maps thread mask\n");
+			goto out_free;
+		}
+		ret = record__mmap_cpu_mask_init_spec(&thread_mask.affinity, affinity_spec[s]);
+		if (ret) {
+			pr_err("Failed to initialize affinity thread mask\n");
+			goto out_free;
+		}
+
+		/* ignore invalid CPUs but do not allow empty masks */
+		if (!bitmap_and(thread_mask.maps.bits, thread_mask.maps.bits,
+				cpus_mask.bits, thread_mask.maps.nbits)) {
+			pr_err("Empty maps mask: %s\n", maps_spec[s]);
+			ret = -EINVAL;
+			goto out_free;
+		}
+		if (!bitmap_and(thread_mask.affinity.bits, thread_mask.affinity.bits,
+				cpus_mask.bits, thread_mask.affinity.nbits)) {
+			pr_err("Empty affinity mask: %s\n", affinity_spec[s]);
+			ret = -EINVAL;
+			goto out_free;
+		}
+
+		/* do not allow intersection with other masks (full_mask) */
+		if (bitmap_intersects(thread_mask.maps.bits, full_mask.maps.bits,
+				      thread_mask.maps.nbits)) {
+			pr_err("Intersecting maps mask: %s\n", maps_spec[s]);
+			ret = -EINVAL;
+			goto out_free;
+		}
+		if (bitmap_intersects(thread_mask.affinity.bits, full_mask.affinity.bits,
+				      thread_mask.affinity.nbits)) {
+			pr_err("Intersecting affinity mask: %s\n", affinity_spec[s]);
+			ret = -EINVAL;
+			goto out_free;
+		}
+
+		bitmap_or(full_mask.maps.bits, full_mask.maps.bits,
+			  thread_mask.maps.bits, full_mask.maps.nbits);
+		bitmap_or(full_mask.affinity.bits, full_mask.affinity.bits,
+			  thread_mask.affinity.bits, full_mask.maps.nbits);
+
+		thread_masks = realloc(rec->thread_masks, (t + 1) * sizeof(struct thread_mask));
+		if (!thread_masks) {
+			pr_err("Failed to reallocate thread masks\n");
+			ret = -ENOMEM;
+			goto out_free;
+		}
+		rec->thread_masks = thread_masks;
+		rec->thread_masks[t] = thread_mask;
+		if (verbose > 0) {
+			pr_debug("thread_masks[%d]: ", t);
+			mmap_cpu_mask__scnprintf(&rec->thread_masks[t].maps, "maps");
+			pr_debug("thread_masks[%d]: ", t);
+			mmap_cpu_mask__scnprintf(&rec->thread_masks[t].affinity, "affinity");
+		}
+		t++;
+		ret = record__thread_mask_alloc(&thread_mask, cpu__max_cpu().cpu);
+		if (ret) {
+			pr_err("Failed to allocate thread mask\n");
+			goto out_free_full_and_cpu_masks;
+		}
+	}
+	rec->nr_threads = t;
+	pr_debug("nr_threads: %d\n", rec->nr_threads);
+	if (!rec->nr_threads)
+		ret = -EINVAL;
+
+out_free:
+	record__thread_mask_free(&thread_mask);
+out_free_full_and_cpu_masks:
+	record__thread_mask_free(&full_mask);
+out_free_cpu_mask:
+	record__mmap_cpu_mask_free(&cpus_mask);
+
+	return ret;
+}
+
+static int record__init_thread_core_masks(struct record *rec, struct perf_cpu_map *cpus)
+{
+	int ret;
+	struct cpu_topology *topo;
+
+	topo = cpu_topology__new();
+	if (!topo) {
+		pr_err("Failed to allocate CPU topology\n");
+		return -ENOMEM;
+	}
+
+	ret = record__init_thread_masks_spec(rec, cpus, topo->core_cpus_list,
+					     topo->core_cpus_list, topo->core_cpus_lists);
+	cpu_topology__delete(topo);
+
+	return ret;
+}
+
+static int record__init_thread_package_masks(struct record *rec, struct perf_cpu_map *cpus)
+{
+	int ret;
+	struct cpu_topology *topo;
+
+	topo = cpu_topology__new();
+	if (!topo) {
+		pr_err("Failed to allocate CPU topology\n");
+		return -ENOMEM;
+	}
+
+	ret = record__init_thread_masks_spec(rec, cpus, topo->package_cpus_list,
+					     topo->package_cpus_list, topo->package_cpus_lists);
+	cpu_topology__delete(topo);
+
+	return ret;
+}
+
+static int record__init_thread_numa_masks(struct record *rec, struct perf_cpu_map *cpus)
+{
+	u32 s;
+	int ret;
+	const char **spec;
+	struct numa_topology *topo;
+
+	topo = numa_topology__new();
+	if (!topo) {
+		pr_err("Failed to allocate NUMA topology\n");
+		return -ENOMEM;
+	}
+
+	spec = zalloc(topo->nr * sizeof(char *));
+	if (!spec) {
+		pr_err("Failed to allocate NUMA spec\n");
+		ret = -ENOMEM;
+		goto out_delete_topo;
+	}
+	for (s = 0; s < topo->nr; s++)
+		spec[s] = topo->nodes[s].cpus;
+
+	ret = record__init_thread_masks_spec(rec, cpus, spec, spec, topo->nr);
+
+	zfree(&spec);
+
+out_delete_topo:
+	numa_topology__delete(topo);
+
+	return ret;
+}
+
+static int record__init_thread_user_masks(struct record *rec, struct perf_cpu_map *cpus)
+{
+	int t, ret;
+	u32 s, nr_spec = 0;
+	char **maps_spec = NULL, **affinity_spec = NULL, **tmp_spec;
+	char *user_spec, *spec, *spec_ptr, *mask, *mask_ptr, *dup_mask = NULL;
+
+	for (t = 0, user_spec = (char *)rec->opts.threads_user_spec; ; t++, user_spec = NULL) {
+		spec = strtok_r(user_spec, ":", &spec_ptr);
+		if (spec == NULL)
+			break;
+		pr_debug2("threads_spec[%d]: %s\n", t, spec);
+		mask = strtok_r(spec, "/", &mask_ptr);
+		if (mask == NULL)
+			break;
+		pr_debug2("  maps mask: %s\n", mask);
+		tmp_spec = realloc(maps_spec, (nr_spec + 1) * sizeof(char *));
+		if (!tmp_spec) {
+			pr_err("Failed to reallocate maps spec\n");
+			ret = -ENOMEM;
+			goto out_free;
+		}
+		maps_spec = tmp_spec;
+		maps_spec[nr_spec] = dup_mask = strdup(mask);
+		if (!maps_spec[nr_spec]) {
+			pr_err("Failed to allocate maps spec[%d]\n", nr_spec);
+			ret = -ENOMEM;
+			goto out_free;
+		}
+		mask = strtok_r(NULL, "/", &mask_ptr);
+		if (mask == NULL) {
+			pr_err("Invalid thread maps or affinity specs\n");
+			ret = -EINVAL;
+			goto out_free;
+		}
+		pr_debug2("  affinity mask: %s\n", mask);
+		tmp_spec = realloc(affinity_spec, (nr_spec + 1) * sizeof(char *));
+		if (!tmp_spec) {
+			pr_err("Failed to reallocate affinity spec\n");
+			ret = -ENOMEM;
+			goto out_free;
+		}
+		affinity_spec = tmp_spec;
+		affinity_spec[nr_spec] = strdup(mask);
+		if (!affinity_spec[nr_spec]) {
+			pr_err("Failed to allocate affinity spec[%d]\n", nr_spec);
+			ret = -ENOMEM;
+			goto out_free;
+		}
+		dup_mask = NULL;
+		nr_spec++;
+	}
+
+	ret = record__init_thread_masks_spec(rec, cpus, (const char **)maps_spec,
+					     (const char **)affinity_spec, nr_spec);
+
+out_free:
+	free(dup_mask);
+	for (s = 0; s < nr_spec; s++) {
+		if (maps_spec)
+			free(maps_spec[s]);
+		if (affinity_spec)
+			free(affinity_spec[s]);
+	}
+	free(affinity_spec);
+	free(maps_spec);
+
+	return ret;
+}
+
+static int record__init_thread_default_masks(struct record *rec, struct perf_cpu_map *cpus)
+{
+	int ret;
+
+	ret = record__alloc_thread_masks(rec, 1, cpu__max_cpu().cpu);
+	if (ret)
+		return ret;
+
+	if (record__mmap_cpu_mask_init(&rec->thread_masks->maps, cpus))
+		return -ENODEV;
+
+	rec->nr_threads = 1;
+
+	return 0;
+}
+
+static int record__init_thread_masks(struct record *rec)
+{
+	int ret = 0;
+	struct perf_cpu_map *cpus = rec->evlist->core.all_cpus;
+
+	if (!record__threads_enabled(rec))
+		return record__init_thread_default_masks(rec, cpus);
+
+	if (evlist__per_thread(rec->evlist)) {
+		pr_err("--per-thread option is mutually exclusive to parallel streaming mode.\n");
+		return -EINVAL;
+	}
+
+	switch (rec->opts.threads_spec) {
+	case THREAD_SPEC__CPU:
+		ret = record__init_thread_cpu_masks(rec, cpus);
+		break;
+	case THREAD_SPEC__CORE:
+		ret = record__init_thread_core_masks(rec, cpus);
+		break;
+	case THREAD_SPEC__PACKAGE:
+		ret = record__init_thread_package_masks(rec, cpus);
+		break;
+	case THREAD_SPEC__NUMA:
+		ret = record__init_thread_numa_masks(rec, cpus);
+		break;
+	case THREAD_SPEC__USER:
+		ret = record__init_thread_user_masks(rec, cpus);
+		break;
+	default:
+		break;
+	}
+
+	return ret;
+}
+
+int cmd_record(int argc, const char **argv)
+{
+	int err;
+	struct record *rec = &record;
+	char errbuf[BUFSIZ];
+
+	setlocale(LC_ALL, "");
+
+#ifndef HAVE_BPF_SKEL
+# define set_nobuild(s, l, m, c) set_option_nobuild(record_options, s, l, m, c)
+	set_nobuild('\0', "off-cpu", "no BUILD_BPF_SKEL=1", true);
+# undef set_nobuild
+#endif
+
+	rec->opts.affinity = PERF_AFFINITY_SYS;
+
+	rec->evlist = evlist__new();
+	if (rec->evlist == NULL)
+		return -ENOMEM;
+
+	err = perf_config(perf_record_config, rec);
+	if (err)
+		return err;
+
+	argc = parse_options(argc, argv, record_options, record_usage,
+			    PARSE_OPT_STOP_AT_NON_OPTION);
+	if (quiet)
+		perf_quiet_option();
+
+	err = symbol__validate_sym_arguments();
+	if (err)
+		return err;
+
+	perf_debuginfod_setup(&record.debuginfod);
+
+	/* Make system wide (-a) the default target. */
+	if (!argc && target__none(&rec->opts.target))
+		rec->opts.target.system_wide = true;
+
+	if (nr_cgroups && !rec->opts.target.system_wide) {
+		usage_with_options_msg(record_usage, record_options,
+			"cgroup monitoring only available in system-wide mode");
+
+	}
+
+	if (rec->buildid_mmap) {
+		if (!perf_can_record_build_id()) {
+			pr_err("Failed: no support to record build id in mmap events, update your kernel.\n");
+			err = -EINVAL;
+			goto out_opts;
+		}
+		pr_debug("Enabling build id in mmap2 events.\n");
+		/* Enable mmap build id synthesizing. */
+		symbol_conf.buildid_mmap2 = true;
+		/* Enable perf_event_attr::build_id bit. */
+		rec->opts.build_id = true;
+		/* Disable build id cache. */
+		rec->no_buildid = true;
+	}
+
+	if (rec->opts.record_cgroup && !perf_can_record_cgroup()) {
+		pr_err("Kernel has no cgroup sampling support.\n");
+		err = -EINVAL;
+		goto out_opts;
+	}
+
+	if (rec->opts.kcore)
+		rec->opts.text_poke = true;
+
+	if (rec->opts.kcore || record__threads_enabled(rec))
+		rec->data.is_dir = true;
+
+	if (record__threads_enabled(rec)) {
+		if (rec->opts.affinity != PERF_AFFINITY_SYS) {
+			pr_err("--affinity option is mutually exclusive to parallel streaming mode.\n");
+			goto out_opts;
+		}
+		if (record__aio_enabled(rec)) {
+			pr_err("Asynchronous streaming mode (--aio) is mutually exclusive to parallel streaming mode.\n");
+			goto out_opts;
+		}
+	}
+
+	if (rec->opts.comp_level != 0) {
+		pr_debug("Compression enabled, disabling build id collection at the end of the session.\n");
+		rec->no_buildid = true;
+	}
+
+	if (rec->opts.record_switch_events &&
+	    !perf_can_record_switch_events()) {
+		ui__error("kernel does not support recording context switch events\n");
+		parse_options_usage(record_usage, record_options, "switch-events", 0);
+		err = -EINVAL;
+		goto out_opts;
+	}
+
+	if (switch_output_setup(rec)) {
+		parse_options_usage(record_usage, record_options, "switch-output", 0);
+		err = -EINVAL;
+		goto out_opts;
+	}
+
+	if (rec->switch_output.time) {
+		signal(SIGALRM, alarm_sig_handler);
+		alarm(rec->switch_output.time);
+	}
+
+	if (rec->switch_output.num_files) {
+		rec->switch_output.filenames = calloc(sizeof(char *),
+						      rec->switch_output.num_files);
+		if (!rec->switch_output.filenames) {
+			err = -EINVAL;
+			goto out_opts;
+		}
+	}
+
+	if (rec->timestamp_filename && record__threads_enabled(rec)) {
+		rec->timestamp_filename = false;
+		pr_warning("WARNING: --timestamp-filename option is not available in parallel streaming mode.\n");
+	}
+
+	/*
+	 * Allow aliases to facilitate the lookup of symbols for address
+	 * filters. Refer to auxtrace_parse_filters().
+	 */
+	symbol_conf.allow_aliases = true;
+
+	symbol__init(NULL);
+
+	err = record__auxtrace_init(rec);
+	if (err)
+		goto out;
+
+	if (dry_run)
+		goto out;
+
+	err = -ENOMEM;
+
+	if (rec->no_buildid_cache || rec->no_buildid) {
+		disable_buildid_cache();
+	} else if (rec->switch_output.enabled) {
+		/*
+		 * In 'perf record --switch-output', disable buildid
+		 * generation by default to reduce data file switching
+		 * overhead. Still generate buildid if they are required
+		 * explicitly using
+		 *
+		 *  perf record --switch-output --no-no-buildid \
+		 *              --no-no-buildid-cache
+		 *
+		 * Following code equals to:
+		 *
+		 * if ((rec->no_buildid || !rec->no_buildid_set) &&
+		 *     (rec->no_buildid_cache || !rec->no_buildid_cache_set))
+		 *         disable_buildid_cache();
+		 */
+		bool disable = true;
+
+		if (rec->no_buildid_set && !rec->no_buildid)
+			disable = false;
+		if (rec->no_buildid_cache_set && !rec->no_buildid_cache)
+			disable = false;
+		if (disable) {
+			rec->no_buildid = true;
+			rec->no_buildid_cache = true;
+			disable_buildid_cache();
+		}
+	}
+
+	if (record.opts.overwrite)
+		record.opts.tail_synthesize = true;
+
+	if (rec->evlist->core.nr_entries == 0) {
+		bool can_profile_kernel = perf_event_paranoid_check(1);
+
+		err = parse_event(rec->evlist, can_profile_kernel ? "cycles:P" : "cycles:Pu");
+		if (err)
+			goto out;
+	}
+
+	if (rec->opts.target.tid && !rec->opts.no_inherit_set)
+		rec->opts.no_inherit = true;
+
+	err = target__validate(&rec->opts.target);
+	if (err) {
+		target__strerror(&rec->opts.target, err, errbuf, BUFSIZ);
+		ui__warning("%s\n", errbuf);
+	}
+
+	err = target__parse_uid(&rec->opts.target);
+	if (err) {
+		int saved_errno = errno;
+
+		target__strerror(&rec->opts.target, err, errbuf, BUFSIZ);
+		ui__error("%s", errbuf);
+
+		err = -saved_errno;
+		goto out;
+	}
+
+	/* Enable ignoring missing threads when -u/-p option is defined. */
+	rec->opts.ignore_missing_thread = rec->opts.target.uid != UINT_MAX || rec->opts.target.pid;
+
+	evlist__warn_user_requested_cpus(rec->evlist, rec->opts.target.cpu_list);
+
+	if (callchain_param.enabled && callchain_param.record_mode == CALLCHAIN_FP)
+		arch__add_leaf_frame_record_opts(&rec->opts);
+
+	err = -ENOMEM;
+	if (evlist__create_maps(rec->evlist, &rec->opts.target) < 0) {
+		if (rec->opts.target.pid != NULL) {
+			pr_err("Couldn't create thread/CPU maps: %s\n",
+				errno == ENOENT ? "No such process" : str_error_r(errno, errbuf, sizeof(errbuf)));
+			goto out;
+		}
+		else
+			usage_with_options(record_usage, record_options);
+	}
+
+	err = auxtrace_record__options(rec->itr, rec->evlist, &rec->opts);
+	if (err)
+		goto out;
+
+	/*
+	 * We take all buildids when the file contains
+	 * AUX area tracing data because we do not decode the
+	 * trace because it would take too long.
+	 */
+	if (rec->opts.full_auxtrace)
+		rec->buildid_all = true;
+
+	if (rec->opts.text_poke) {
+		err = record__config_text_poke(rec->evlist);
+		if (err) {
+			pr_err("record__config_text_poke failed, error %d\n", err);
+			goto out;
+		}
+	}
+
+	if (rec->off_cpu) {
+		err = record__config_off_cpu(rec);
+		if (err) {
+			pr_err("record__config_off_cpu failed, error %d\n", err);
+			goto out;
+		}
+	}
+
+	if (record_opts__config(&rec->opts)) {
+		err = -EINVAL;
+		goto out;
+	}
+
+	err = record__init_thread_masks(rec);
+	if (err) {
+		pr_err("Failed to initialize parallel data streaming masks\n");
+		goto out;
+	}
+
+	if (rec->opts.nr_cblocks > nr_cblocks_max)
+		rec->opts.nr_cblocks = nr_cblocks_max;
+	pr_debug("nr_cblocks: %d\n", rec->opts.nr_cblocks);
+
+	pr_debug("affinity: %s\n", affinity_tags[rec->opts.affinity]);
+	pr_debug("mmap flush: %d\n", rec->opts.mmap_flush);
+
+	if (rec->opts.comp_level > comp_level_max)
+		rec->opts.comp_level = comp_level_max;
+	pr_debug("comp level: %d\n", rec->opts.comp_level);
+
+	err = __cmd_record(&record, argc, argv);
+out:
+	evlist__delete(rec->evlist);
+	symbol__exit();
+	auxtrace_record__free(rec->itr);
+out_opts:
+	record__free_thread_masks(rec, rec->nr_threads);
+	rec->nr_threads = 0;
+	evlist__close_control(rec->opts.ctl_fd, rec->opts.ctl_fd_ack, &rec->opts.ctl_fd_close);
+	return err;
+}
+
+static void snapshot_sig_handler(int sig __maybe_unused)
+{
+	struct record *rec = &record;
+
+	hit_auxtrace_snapshot_trigger(rec);
+
+	if (switch_output_signal(rec))
+		trigger_hit(&switch_output_trigger);
+}
+
+static void alarm_sig_handler(int sig __maybe_unused)
+{
+	struct record *rec = &record;
+
+	if (switch_output_time(rec))
+		trigger_hit(&switch_output_trigger);
+}