Adding upstream version 4.19.249.upstream/4.19.249

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

1 files changed, 3387 insertions, 0 deletions

diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
new file mode 100644
index 000000000..3f43aedb3
--- /dev/null
+++ b/tools/perf/builtin-trace.c
@@ -0,0 +1,3387 @@
+/*
+ * builtin-trace.c
+ *
+ * Builtin 'trace' command:
+ *
+ * Display a continuously updated trace of any workload, CPU, specific PID,
+ * system wide, etc.  Default format is loosely strace like, but any other
+ * event may be specified using --event.
+ *
+ * Copyright (C) 2012, 2013, 2014, 2015 Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
+ *
+ * Initially based on the 'trace' prototype by Thomas Gleixner:
+ *
+ * http://lwn.net/Articles/415728/ ("Announcing a new utility: 'trace'")
+ *
+ * Released under the GPL v2. (and only v2, not any later version)
+ */
+
+#include <traceevent/event-parse.h>
+#include <api/fs/tracing_path.h>
+#include "builtin.h"
+#include "util/cgroup.h"
+#include "util/color.h"
+#include "util/debug.h"
+#include "util/env.h"
+#include "util/event.h"
+#include "util/evlist.h"
+#include <subcmd/exec-cmd.h>
+#include "util/machine.h"
+#include "util/path.h"
+#include "util/session.h"
+#include "util/thread.h"
+#include <subcmd/parse-options.h>
+#include "util/strlist.h"
+#include "util/intlist.h"
+#include "util/thread_map.h"
+#include "util/stat.h"
+#include "trace/beauty/beauty.h"
+#include "trace-event.h"
+#include "util/parse-events.h"
+#include "util/bpf-loader.h"
+#include "callchain.h"
+#include "print_binary.h"
+#include "string2.h"
+#include "syscalltbl.h"
+#include "rb_resort.h"
+
+#include <errno.h>
+#include <inttypes.h>
+#include <poll.h>
+#include <signal.h>
+#include <stdlib.h>
+#include <string.h>
+#include <linux/err.h>
+#include <linux/filter.h>
+#include <linux/kernel.h>
+#include <linux/random.h>
+#include <linux/stringify.h>
+#include <linux/time64.h>
+#include <fcntl.h>
+
+#include "sane_ctype.h"
+
+#ifndef O_CLOEXEC
+# define O_CLOEXEC		02000000
+#endif
+
+#ifndef F_LINUX_SPECIFIC_BASE
+# define F_LINUX_SPECIFIC_BASE	1024
+#endif
+
+struct trace {
+	struct perf_tool	tool;
+	struct syscalltbl	*sctbl;
+	struct {
+		int		max;
+		struct syscall  *table;
+		struct {
+			struct perf_evsel *sys_enter,
+					  *sys_exit,
+					  *augmented;
+		}		events;
+	} syscalls;
+	struct record_opts	opts;
+	struct perf_evlist	*evlist;
+	struct machine		*host;
+	struct thread		*current;
+	struct cgroup		*cgroup;
+	u64			base_time;
+	FILE			*output;
+	unsigned long		nr_events;
+	struct strlist		*ev_qualifier;
+	struct {
+		size_t		nr;
+		int		*entries;
+	}			ev_qualifier_ids;
+	struct {
+		size_t		nr;
+		pid_t		*entries;
+	}			filter_pids;
+	double			duration_filter;
+	double			runtime_ms;
+	struct {
+		u64		vfs_getname,
+				proc_getname;
+	} stats;
+	unsigned int		max_stack;
+	unsigned int		min_stack;
+	bool			not_ev_qualifier;
+	bool			live;
+	bool			full_time;
+	bool			sched;
+	bool			multiple_threads;
+	bool			summary;
+	bool			summary_only;
+	bool			failure_only;
+	bool			show_comm;
+	bool			print_sample;
+	bool			show_tool_stats;
+	bool			trace_syscalls;
+	bool			kernel_syscallchains;
+	bool			force;
+	bool			vfs_getname;
+	int			trace_pgfaults;
+};
+
+struct tp_field {
+	int offset;
+	union {
+		u64 (*integer)(struct tp_field *field, struct perf_sample *sample);
+		void *(*pointer)(struct tp_field *field, struct perf_sample *sample);
+	};
+};
+
+#define TP_UINT_FIELD(bits) \
+static u64 tp_field__u##bits(struct tp_field *field, struct perf_sample *sample) \
+{ \
+	u##bits value; \
+	memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \
+	return value;  \
+}
+
+TP_UINT_FIELD(8);
+TP_UINT_FIELD(16);
+TP_UINT_FIELD(32);
+TP_UINT_FIELD(64);
+
+#define TP_UINT_FIELD__SWAPPED(bits) \
+static u64 tp_field__swapped_u##bits(struct tp_field *field, struct perf_sample *sample) \
+{ \
+	u##bits value; \
+	memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \
+	return bswap_##bits(value);\
+}
+
+TP_UINT_FIELD__SWAPPED(16);
+TP_UINT_FIELD__SWAPPED(32);
+TP_UINT_FIELD__SWAPPED(64);
+
+static int __tp_field__init_uint(struct tp_field *field, int size, int offset, bool needs_swap)
+{
+	field->offset = offset;
+
+	switch (size) {
+	case 1:
+		field->integer = tp_field__u8;
+		break;
+	case 2:
+		field->integer = needs_swap ? tp_field__swapped_u16 : tp_field__u16;
+		break;
+	case 4:
+		field->integer = needs_swap ? tp_field__swapped_u32 : tp_field__u32;
+		break;
+	case 8:
+		field->integer = needs_swap ? tp_field__swapped_u64 : tp_field__u64;
+		break;
+	default:
+		return -1;
+	}
+
+	return 0;
+}
+
+static int tp_field__init_uint(struct tp_field *field, struct format_field *format_field, bool needs_swap)
+{
+	return __tp_field__init_uint(field, format_field->size, format_field->offset, needs_swap);
+}
+
+static void *tp_field__ptr(struct tp_field *field, struct perf_sample *sample)
+{
+	return sample->raw_data + field->offset;
+}
+
+static int __tp_field__init_ptr(struct tp_field *field, int offset)
+{
+	field->offset = offset;
+	field->pointer = tp_field__ptr;
+	return 0;
+}
+
+static int tp_field__init_ptr(struct tp_field *field, struct format_field *format_field)
+{
+	return __tp_field__init_ptr(field, format_field->offset);
+}
+
+struct syscall_tp {
+	struct tp_field id;
+	union {
+		struct tp_field args, ret;
+	};
+};
+
+static int perf_evsel__init_tp_uint_field(struct perf_evsel *evsel,
+					  struct tp_field *field,
+					  const char *name)
+{
+	struct format_field *format_field = perf_evsel__field(evsel, name);
+
+	if (format_field == NULL)
+		return -1;
+
+	return tp_field__init_uint(field, format_field, evsel->needs_swap);
+}
+
+#define perf_evsel__init_sc_tp_uint_field(evsel, name) \
+	({ struct syscall_tp *sc = evsel->priv;\
+	   perf_evsel__init_tp_uint_field(evsel, &sc->name, #name); })
+
+static int perf_evsel__init_tp_ptr_field(struct perf_evsel *evsel,
+					 struct tp_field *field,
+					 const char *name)
+{
+	struct format_field *format_field = perf_evsel__field(evsel, name);
+
+	if (format_field == NULL)
+		return -1;
+
+	return tp_field__init_ptr(field, format_field);
+}
+
+#define perf_evsel__init_sc_tp_ptr_field(evsel, name) \
+	({ struct syscall_tp *sc = evsel->priv;\
+	   perf_evsel__init_tp_ptr_field(evsel, &sc->name, #name); })
+
+static void perf_evsel__delete_priv(struct perf_evsel *evsel)
+{
+	zfree(&evsel->priv);
+	perf_evsel__delete(evsel);
+}
+
+static int perf_evsel__init_syscall_tp(struct perf_evsel *evsel)
+{
+	struct syscall_tp *sc = evsel->priv = malloc(sizeof(struct syscall_tp));
+
+	if (evsel->priv != NULL) {
+		if (perf_evsel__init_tp_uint_field(evsel, &sc->id, "__syscall_nr"))
+			goto out_delete;
+		return 0;
+	}
+
+	return -ENOMEM;
+out_delete:
+	zfree(&evsel->priv);
+	return -ENOENT;
+}
+
+static int perf_evsel__init_augmented_syscall_tp(struct perf_evsel *evsel)
+{
+	struct syscall_tp *sc = evsel->priv = malloc(sizeof(struct syscall_tp));
+
+	if (evsel->priv != NULL) {       /* field, sizeof_field, offsetof_field */
+		if (__tp_field__init_uint(&sc->id, sizeof(long), sizeof(long long), evsel->needs_swap))
+			goto out_delete;
+
+		return 0;
+	}
+
+	return -ENOMEM;
+out_delete:
+	zfree(&evsel->priv);
+	return -EINVAL;
+}
+
+static int perf_evsel__init_augmented_syscall_tp_args(struct perf_evsel *evsel)
+{
+	struct syscall_tp *sc = evsel->priv;
+
+	return __tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64));
+}
+
+static int perf_evsel__init_raw_syscall_tp(struct perf_evsel *evsel, void *handler)
+{
+	evsel->priv = malloc(sizeof(struct syscall_tp));
+	if (evsel->priv != NULL) {
+		if (perf_evsel__init_sc_tp_uint_field(evsel, id))
+			goto out_delete;
+
+		evsel->handler = handler;
+		return 0;
+	}
+
+	return -ENOMEM;
+
+out_delete:
+	zfree(&evsel->priv);
+	return -ENOENT;
+}
+
+static struct perf_evsel *perf_evsel__raw_syscall_newtp(const char *direction, void *handler)
+{
+	struct perf_evsel *evsel = perf_evsel__newtp("raw_syscalls", direction);
+
+	/* older kernel (e.g., RHEL6) use syscalls:{enter,exit} */
+	if (IS_ERR(evsel))
+		evsel = perf_evsel__newtp("syscalls", direction);
+
+	if (IS_ERR(evsel))
+		return NULL;
+
+	if (perf_evsel__init_raw_syscall_tp(evsel, handler))
+		goto out_delete;
+
+	return evsel;
+
+out_delete:
+	perf_evsel__delete_priv(evsel);
+	return NULL;
+}
+
+#define perf_evsel__sc_tp_uint(evsel, name, sample) \
+	({ struct syscall_tp *fields = evsel->priv; \
+	   fields->name.integer(&fields->name, sample); })
+
+#define perf_evsel__sc_tp_ptr(evsel, name, sample) \
+	({ struct syscall_tp *fields = evsel->priv; \
+	   fields->name.pointer(&fields->name, sample); })
+
+size_t strarray__scnprintf(struct strarray *sa, char *bf, size_t size, const char *intfmt, int val)
+{
+	int idx = val - sa->offset;
+
+	if (idx < 0 || idx >= sa->nr_entries || sa->entries[idx] == NULL)
+		return scnprintf(bf, size, intfmt, val);
+
+	return scnprintf(bf, size, "%s", sa->entries[idx]);
+}
+
+static size_t __syscall_arg__scnprintf_strarray(char *bf, size_t size,
+						const char *intfmt,
+					        struct syscall_arg *arg)
+{
+	return strarray__scnprintf(arg->parm, bf, size, intfmt, arg->val);
+}
+
+static size_t syscall_arg__scnprintf_strarray(char *bf, size_t size,
+					      struct syscall_arg *arg)
+{
+	return __syscall_arg__scnprintf_strarray(bf, size, "%d", arg);
+}
+
+#define SCA_STRARRAY syscall_arg__scnprintf_strarray
+
+struct strarrays {
+	int		nr_entries;
+	struct strarray **entries;
+};
+
+#define DEFINE_STRARRAYS(array) struct strarrays strarrays__##array = { \
+	.nr_entries = ARRAY_SIZE(array), \
+	.entries = array, \
+}
+
+size_t syscall_arg__scnprintf_strarrays(char *bf, size_t size,
+					struct syscall_arg *arg)
+{
+	struct strarrays *sas = arg->parm;
+	int i;
+
+	for (i = 0; i < sas->nr_entries; ++i) {
+		struct strarray *sa = sas->entries[i];
+		int idx = arg->val - sa->offset;
+
+		if (idx >= 0 && idx < sa->nr_entries) {
+			if (sa->entries[idx] == NULL)
+				break;
+			return scnprintf(bf, size, "%s", sa->entries[idx]);
+		}
+	}
+
+	return scnprintf(bf, size, "%d", arg->val);
+}
+
+#ifndef AT_FDCWD
+#define AT_FDCWD	-100
+#endif
+
+static size_t syscall_arg__scnprintf_fd_at(char *bf, size_t size,
+					   struct syscall_arg *arg)
+{
+	int fd = arg->val;
+
+	if (fd == AT_FDCWD)
+		return scnprintf(bf, size, "CWD");
+
+	return syscall_arg__scnprintf_fd(bf, size, arg);
+}
+
+#define SCA_FDAT syscall_arg__scnprintf_fd_at
+
+static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size,
+					      struct syscall_arg *arg);
+
+#define SCA_CLOSE_FD syscall_arg__scnprintf_close_fd
+
+size_t syscall_arg__scnprintf_hex(char *bf, size_t size, struct syscall_arg *arg)
+{
+	return scnprintf(bf, size, "%#lx", arg->val);
+}
+
+size_t syscall_arg__scnprintf_int(char *bf, size_t size, struct syscall_arg *arg)
+{
+	return scnprintf(bf, size, "%d", arg->val);
+}
+
+size_t syscall_arg__scnprintf_long(char *bf, size_t size, struct syscall_arg *arg)
+{
+	return scnprintf(bf, size, "%ld", arg->val);
+}
+
+static const char *bpf_cmd[] = {
+	"MAP_CREATE", "MAP_LOOKUP_ELEM", "MAP_UPDATE_ELEM", "MAP_DELETE_ELEM",
+	"MAP_GET_NEXT_KEY", "PROG_LOAD",
+};
+static DEFINE_STRARRAY(bpf_cmd);
+
+static const char *epoll_ctl_ops[] = { "ADD", "DEL", "MOD", };
+static DEFINE_STRARRAY_OFFSET(epoll_ctl_ops, 1);
+
+static const char *itimers[] = { "REAL", "VIRTUAL", "PROF", };
+static DEFINE_STRARRAY(itimers);
+
+static const char *keyctl_options[] = {
+	"GET_KEYRING_ID", "JOIN_SESSION_KEYRING", "UPDATE", "REVOKE", "CHOWN",
+	"SETPERM", "DESCRIBE", "CLEAR", "LINK", "UNLINK", "SEARCH", "READ",
+	"INSTANTIATE", "NEGATE", "SET_REQKEY_KEYRING", "SET_TIMEOUT",
+	"ASSUME_AUTHORITY", "GET_SECURITY", "SESSION_TO_PARENT", "REJECT",
+	"INSTANTIATE_IOV", "INVALIDATE", "GET_PERSISTENT",
+};
+static DEFINE_STRARRAY(keyctl_options);
+
+static const char *whences[] = { "SET", "CUR", "END",
+#ifdef SEEK_DATA
+"DATA",
+#endif
+#ifdef SEEK_HOLE
+"HOLE",
+#endif
+};
+static DEFINE_STRARRAY(whences);
+
+static const char *fcntl_cmds[] = {
+	"DUPFD", "GETFD", "SETFD", "GETFL", "SETFL", "GETLK", "SETLK",
+	"SETLKW", "SETOWN", "GETOWN", "SETSIG", "GETSIG", "GETLK64",
+	"SETLK64", "SETLKW64", "SETOWN_EX", "GETOWN_EX",
+	"GETOWNER_UIDS",
+};
+static DEFINE_STRARRAY(fcntl_cmds);
+
+static const char *fcntl_linux_specific_cmds[] = {
+	"SETLEASE", "GETLEASE", "NOTIFY", [5] =	"CANCELLK", "DUPFD_CLOEXEC",
+	"SETPIPE_SZ", "GETPIPE_SZ", "ADD_SEALS", "GET_SEALS",
+	"GET_RW_HINT", "SET_RW_HINT", "GET_FILE_RW_HINT", "SET_FILE_RW_HINT",
+};
+
+static DEFINE_STRARRAY_OFFSET(fcntl_linux_specific_cmds, F_LINUX_SPECIFIC_BASE);
+
+static struct strarray *fcntl_cmds_arrays[] = {
+	&strarray__fcntl_cmds,
+	&strarray__fcntl_linux_specific_cmds,
+};
+
+static DEFINE_STRARRAYS(fcntl_cmds_arrays);
+
+static const char *rlimit_resources[] = {
+	"CPU", "FSIZE", "DATA", "STACK", "CORE", "RSS", "NPROC", "NOFILE",
+	"MEMLOCK", "AS", "LOCKS", "SIGPENDING", "MSGQUEUE", "NICE", "RTPRIO",
+	"RTTIME",
+};
+static DEFINE_STRARRAY(rlimit_resources);
+
+static const char *sighow[] = { "BLOCK", "UNBLOCK", "SETMASK", };
+static DEFINE_STRARRAY(sighow);
+
+static const char *clockid[] = {
+	"REALTIME", "MONOTONIC", "PROCESS_CPUTIME_ID", "THREAD_CPUTIME_ID",
+	"MONOTONIC_RAW", "REALTIME_COARSE", "MONOTONIC_COARSE", "BOOTTIME",
+	"REALTIME_ALARM", "BOOTTIME_ALARM", "SGI_CYCLE", "TAI"
+};
+static DEFINE_STRARRAY(clockid);
+
+static const char *socket_families[] = {
+	"UNSPEC", "LOCAL", "INET", "AX25", "IPX", "APPLETALK", "NETROM",
+	"BRIDGE", "ATMPVC", "X25", "INET6", "ROSE", "DECnet", "NETBEUI",
+	"SECURITY", "KEY", "NETLINK", "PACKET", "ASH", "ECONET", "ATMSVC",
+	"RDS", "SNA", "IRDA", "PPPOX", "WANPIPE", "LLC", "IB", "CAN", "TIPC",
+	"BLUETOOTH", "IUCV", "RXRPC", "ISDN", "PHONET", "IEEE802154", "CAIF",
+	"ALG", "NFC", "VSOCK",
+};
+static DEFINE_STRARRAY(socket_families);
+
+static size_t syscall_arg__scnprintf_access_mode(char *bf, size_t size,
+						 struct syscall_arg *arg)
+{
+	size_t printed = 0;
+	int mode = arg->val;
+
+	if (mode == F_OK) /* 0 */
+		return scnprintf(bf, size, "F");
+#define	P_MODE(n) \
+	if (mode & n##_OK) { \
+		printed += scnprintf(bf + printed, size - printed, "%s", #n); \
+		mode &= ~n##_OK; \
+	}
+
+	P_MODE(R);
+	P_MODE(W);
+	P_MODE(X);
+#undef P_MODE
+
+	if (mode)
+		printed += scnprintf(bf + printed, size - printed, "|%#x", mode);
+
+	return printed;
+}
+
+#define SCA_ACCMODE syscall_arg__scnprintf_access_mode
+
+static size_t syscall_arg__scnprintf_filename(char *bf, size_t size,
+					      struct syscall_arg *arg);
+
+#define SCA_FILENAME syscall_arg__scnprintf_filename
+
+static size_t syscall_arg__scnprintf_pipe_flags(char *bf, size_t size,
+						struct syscall_arg *arg)
+{
+	int printed = 0, flags = arg->val;
+
+#define	P_FLAG(n) \
+	if (flags & O_##n) { \
+		printed += scnprintf(bf + printed, size - printed, "%s%s", printed ? "|" : "", #n); \
+		flags &= ~O_##n; \
+	}
+
+	P_FLAG(CLOEXEC);
+	P_FLAG(NONBLOCK);
+#undef P_FLAG
+
+	if (flags)
+		printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags);
+
+	return printed;
+}
+
+#define SCA_PIPE_FLAGS syscall_arg__scnprintf_pipe_flags
+
+#ifndef GRND_NONBLOCK
+#define GRND_NONBLOCK	0x0001
+#endif
+#ifndef GRND_RANDOM
+#define GRND_RANDOM	0x0002
+#endif
+
+static size_t syscall_arg__scnprintf_getrandom_flags(char *bf, size_t size,
+						   struct syscall_arg *arg)
+{
+	int printed = 0, flags = arg->val;
+
+#define	P_FLAG(n) \
+	if (flags & GRND_##n) { \
+		printed += scnprintf(bf + printed, size - printed, "%s%s", printed ? "|" : "", #n); \
+		flags &= ~GRND_##n; \
+	}
+
+	P_FLAG(RANDOM);
+	P_FLAG(NONBLOCK);
+#undef P_FLAG
+
+	if (flags)
+		printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags);
+
+	return printed;
+}
+
+#define SCA_GETRANDOM_FLAGS syscall_arg__scnprintf_getrandom_flags
+
+#define STRARRAY(name, array) \
+	  { .scnprintf	= SCA_STRARRAY, \
+	    .parm	= &strarray__##array, }
+
+#include "trace/beauty/arch_errno_names.c"
+#include "trace/beauty/eventfd.c"
+#include "trace/beauty/futex_op.c"
+#include "trace/beauty/futex_val3.c"
+#include "trace/beauty/mmap.c"
+#include "trace/beauty/mode_t.c"
+#include "trace/beauty/msg_flags.c"
+#include "trace/beauty/open_flags.c"
+#include "trace/beauty/perf_event_open.c"
+#include "trace/beauty/pid.c"
+#include "trace/beauty/sched_policy.c"
+#include "trace/beauty/seccomp.c"
+#include "trace/beauty/signum.c"
+#include "trace/beauty/socket_type.c"
+#include "trace/beauty/waitid_options.c"
+
+struct syscall_arg_fmt {
+	size_t	   (*scnprintf)(char *bf, size_t size, struct syscall_arg *arg);
+	void	   *parm;
+	const char *name;
+	bool	   show_zero;
+};
+
+static struct syscall_fmt {
+	const char *name;
+	const char *alias;
+	struct syscall_arg_fmt arg[6];
+	u8	   nr_args;
+	bool	   errpid;
+	bool	   timeout;
+	bool	   hexret;
+} syscall_fmts[] = {
+	{ .name	    = "access",
+	  .arg = { [1] = { .scnprintf = SCA_ACCMODE,  /* mode */ }, }, },
+	{ .name	    = "bpf",
+	  .arg = { [0] = STRARRAY(cmd, bpf_cmd), }, },
+	{ .name	    = "brk",	    .hexret = true,
+	  .arg = { [0] = { .scnprintf = SCA_HEX, /* brk */ }, }, },
+	{ .name     = "clock_gettime",
+	  .arg = { [0] = STRARRAY(clk_id, clockid), }, },
+	{ .name	    = "clone",	    .errpid = true, .nr_args = 5,
+	  .arg = { [0] = { .name = "flags",	    .scnprintf = SCA_CLONE_FLAGS, },
+		   [1] = { .name = "child_stack",   .scnprintf = SCA_HEX, },
+		   [2] = { .name = "parent_tidptr", .scnprintf = SCA_HEX, },
+		   [3] = { .name = "child_tidptr",  .scnprintf = SCA_HEX, },
+		   [4] = { .name = "tls",	    .scnprintf = SCA_HEX, }, }, },
+	{ .name	    = "close",
+	  .arg = { [0] = { .scnprintf = SCA_CLOSE_FD, /* fd */ }, }, },
+	{ .name	    = "epoll_ctl",
+	  .arg = { [1] = STRARRAY(op, epoll_ctl_ops), }, },
+	{ .name	    = "eventfd2",
+	  .arg = { [1] = { .scnprintf = SCA_EFD_FLAGS, /* flags */ }, }, },
+	{ .name	    = "fchmodat",
+	  .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
+	{ .name	    = "fchownat",
+	  .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
+	{ .name	    = "fcntl",
+	  .arg = { [1] = { .scnprintf = SCA_FCNTL_CMD, /* cmd */
+			   .parm      = &strarrays__fcntl_cmds_arrays,
+			   .show_zero = true, },
+		   [2] = { .scnprintf =  SCA_FCNTL_ARG, /* arg */ }, }, },
+	{ .name	    = "flock",
+	  .arg = { [1] = { .scnprintf = SCA_FLOCK, /* cmd */ }, }, },
+	{ .name	    = "fstat", .alias = "newfstat", },
+	{ .name	    = "fstatat", .alias = "newfstatat", },
+	{ .name	    = "futex",
+	  .arg = { [1] = { .scnprintf = SCA_FUTEX_OP, /* op */ },
+		   [5] = { .scnprintf = SCA_FUTEX_VAL3, /* val3 */ }, }, },
+	{ .name	    = "futimesat",
+	  .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
+	{ .name	    = "getitimer",
+	  .arg = { [0] = STRARRAY(which, itimers), }, },
+	{ .name	    = "getpid",	    .errpid = true, },
+	{ .name	    = "getpgid",    .errpid = true, },
+	{ .name	    = "getppid",    .errpid = true, },
+	{ .name	    = "getrandom",
+	  .arg = { [2] = { .scnprintf = SCA_GETRANDOM_FLAGS, /* flags */ }, }, },
+	{ .name	    = "getrlimit",
+	  .arg = { [0] = STRARRAY(resource, rlimit_resources), }, },
+	{ .name	    = "gettid",	    .errpid = true, },
+	{ .name	    = "ioctl",
+	  .arg = {
+#if defined(__i386__) || defined(__x86_64__)
+/*
+ * FIXME: Make this available to all arches.
+ */
+		   [1] = { .scnprintf = SCA_IOCTL_CMD, /* cmd */ },
+		   [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, },
+#else
+		   [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, },
+#endif
+	{ .name	    = "kcmp",	    .nr_args = 5,
+	  .arg = { [0] = { .name = "pid1",	.scnprintf = SCA_PID, },
+		   [1] = { .name = "pid2",	.scnprintf = SCA_PID, },
+		   [2] = { .name = "type",	.scnprintf = SCA_KCMP_TYPE, },
+		   [3] = { .name = "idx1",	.scnprintf = SCA_KCMP_IDX, },
+		   [4] = { .name = "idx2",	.scnprintf = SCA_KCMP_IDX, }, }, },
+	{ .name	    = "keyctl",
+	  .arg = { [0] = STRARRAY(option, keyctl_options), }, },
+	{ .name	    = "kill",
+	  .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
+	{ .name	    = "linkat",
+	  .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
+	{ .name	    = "lseek",
+	  .arg = { [2] = STRARRAY(whence, whences), }, },
+	{ .name	    = "lstat", .alias = "newlstat", },
+	{ .name     = "madvise",
+	  .arg = { [0] = { .scnprintf = SCA_HEX,      /* start */ },
+		   [2] = { .scnprintf = SCA_MADV_BHV, /* behavior */ }, }, },
+	{ .name	    = "mkdirat",
+	  .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
+	{ .name	    = "mknodat",
+	  .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
+	{ .name	    = "mlock",
+	  .arg = { [0] = { .scnprintf = SCA_HEX, /* addr */ }, }, },
+	{ .name	    = "mlockall",
+	  .arg = { [0] = { .scnprintf = SCA_HEX, /* addr */ }, }, },
+	{ .name	    = "mmap",	    .hexret = true,
+/* The standard mmap maps to old_mmap on s390x */
+#if defined(__s390x__)
+	.alias = "old_mmap",
+#endif
+	  .arg = { [0] = { .scnprintf = SCA_HEX,	/* addr */ },
+		   [2] = { .scnprintf = SCA_MMAP_PROT,	/* prot */ },
+		   [3] = { .scnprintf = SCA_MMAP_FLAGS,	/* flags */ }, }, },
+	{ .name	    = "mprotect",
+	  .arg = { [0] = { .scnprintf = SCA_HEX,	/* start */ },
+		   [2] = { .scnprintf = SCA_MMAP_PROT,	/* prot */ }, }, },
+	{ .name	    = "mq_unlink",
+	  .arg = { [0] = { .scnprintf = SCA_FILENAME, /* u_name */ }, }, },
+	{ .name	    = "mremap",	    .hexret = true,
+	  .arg = { [0] = { .scnprintf = SCA_HEX,	  /* addr */ },
+		   [3] = { .scnprintf = SCA_MREMAP_FLAGS, /* flags */ },
+		   [4] = { .scnprintf = SCA_HEX,	  /* new_addr */ }, }, },
+	{ .name	    = "munlock",
+	  .arg = { [0] = { .scnprintf = SCA_HEX, /* addr */ }, }, },
+	{ .name	    = "munmap",
+	  .arg = { [0] = { .scnprintf = SCA_HEX, /* addr */ }, }, },
+	{ .name	    = "name_to_handle_at",
+	  .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
+	{ .name	    = "newfstatat",
+	  .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
+	{ .name	    = "open",
+	  .arg = { [1] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, },
+	{ .name	    = "open_by_handle_at",
+	  .arg = { [0] = { .scnprintf = SCA_FDAT,	/* dfd */ },
+		   [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, },
+	{ .name	    = "openat",
+	  .arg = { [0] = { .scnprintf = SCA_FDAT,	/* dfd */ },
+		   [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, },
+	{ .name	    = "perf_event_open",
+	  .arg = { [2] = { .scnprintf = SCA_INT,	/* cpu */ },
+		   [3] = { .scnprintf = SCA_FD,		/* group_fd */ },
+		   [4] = { .scnprintf = SCA_PERF_FLAGS, /* flags */ }, }, },
+	{ .name	    = "pipe2",
+	  .arg = { [1] = { .scnprintf = SCA_PIPE_FLAGS, /* flags */ }, }, },
+	{ .name	    = "pkey_alloc",
+	  .arg = { [1] = { .scnprintf = SCA_PKEY_ALLOC_ACCESS_RIGHTS,	/* access_rights */ }, }, },
+	{ .name	    = "pkey_free",
+	  .arg = { [0] = { .scnprintf = SCA_INT,	/* key */ }, }, },
+	{ .name	    = "pkey_mprotect",
+	  .arg = { [0] = { .scnprintf = SCA_HEX,	/* start */ },
+		   [2] = { .scnprintf = SCA_MMAP_PROT,	/* prot */ },
+		   [3] = { .scnprintf = SCA_INT,	/* pkey */ }, }, },
+	{ .name	    = "poll", .timeout = true, },
+	{ .name	    = "ppoll", .timeout = true, },
+	{ .name	    = "prctl", .alias = "arch_prctl",
+	  .arg = { [0] = { .scnprintf = SCA_PRCTL_OPTION, /* option */ },
+		   [1] = { .scnprintf = SCA_PRCTL_ARG2, /* arg2 */ },
+		   [2] = { .scnprintf = SCA_PRCTL_ARG3, /* arg3 */ }, }, },
+	{ .name	    = "pread", .alias = "pread64", },
+	{ .name	    = "preadv", .alias = "pread", },
+	{ .name	    = "prlimit64",
+	  .arg = { [1] = STRARRAY(resource, rlimit_resources), }, },
+	{ .name	    = "pwrite", .alias = "pwrite64", },
+	{ .name	    = "readlinkat",
+	  .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
+	{ .name	    = "recvfrom",
+	  .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
+	{ .name	    = "recvmmsg",
+	  .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
+	{ .name	    = "recvmsg",
+	  .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
+	{ .name	    = "renameat",
+	  .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
+	{ .name	    = "rt_sigaction",
+	  .arg = { [0] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
+	{ .name	    = "rt_sigprocmask",
+	  .arg = { [0] = STRARRAY(how, sighow), }, },
+	{ .name	    = "rt_sigqueueinfo",
+	  .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
+	{ .name	    = "rt_tgsigqueueinfo",
+	  .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
+	{ .name	    = "sched_setscheduler",
+	  .arg = { [1] = { .scnprintf = SCA_SCHED_POLICY, /* policy */ }, }, },
+	{ .name	    = "seccomp",
+	  .arg = { [0] = { .scnprintf = SCA_SECCOMP_OP,	   /* op */ },
+		   [1] = { .scnprintf = SCA_SECCOMP_FLAGS, /* flags */ }, }, },
+	{ .name	    = "select", .timeout = true, },
+	{ .name	    = "sendmmsg",
+	  .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
+	{ .name	    = "sendmsg",
+	  .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
+	{ .name	    = "sendto",
+	  .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
+	{ .name	    = "set_tid_address", .errpid = true, },
+	{ .name	    = "setitimer",
+	  .arg = { [0] = STRARRAY(which, itimers), }, },
+	{ .name	    = "setrlimit",
+	  .arg = { [0] = STRARRAY(resource, rlimit_resources), }, },
+	{ .name	    = "socket",
+	  .arg = { [0] = STRARRAY(family, socket_families),
+		   [1] = { .scnprintf = SCA_SK_TYPE, /* type */ },
+		   [2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, },
+	{ .name	    = "socketpair",
+	  .arg = { [0] = STRARRAY(family, socket_families),
+		   [1] = { .scnprintf = SCA_SK_TYPE, /* type */ },
+		   [2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, },
+	{ .name	    = "stat", .alias = "newstat", },
+	{ .name	    = "statx",
+	  .arg = { [0] = { .scnprintf = SCA_FDAT,	 /* fdat */ },
+		   [2] = { .scnprintf = SCA_STATX_FLAGS, /* flags */ } ,
+		   [3] = { .scnprintf = SCA_STATX_MASK,	 /* mask */ }, }, },
+	{ .name	    = "swapoff",
+	  .arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, },
+	{ .name	    = "swapon",
+	  .arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, },
+	{ .name	    = "symlinkat",
+	  .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
+	{ .name	    = "tgkill",
+	  .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
+	{ .name	    = "tkill",
+	  .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
+	{ .name	    = "uname", .alias = "newuname", },
+	{ .name	    = "unlinkat",
+	  .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
+	{ .name	    = "utimensat",
+	  .arg = { [0] = { .scnprintf = SCA_FDAT, /* dirfd */ }, }, },
+	{ .name	    = "wait4",	    .errpid = true,
+	  .arg = { [2] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, },
+	{ .name	    = "waitid",	    .errpid = true,
+	  .arg = { [3] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, },
+};
+
+static int syscall_fmt__cmp(const void *name, const void *fmtp)
+{
+	const struct syscall_fmt *fmt = fmtp;
+	return strcmp(name, fmt->name);
+}
+
+static struct syscall_fmt *syscall_fmt__find(const char *name)
+{
+	const int nmemb = ARRAY_SIZE(syscall_fmts);
+	return bsearch(name, syscall_fmts, nmemb, sizeof(struct syscall_fmt), syscall_fmt__cmp);
+}
+
+/*
+ * is_exit: is this "exit" or "exit_group"?
+ * is_open: is this "open" or "openat"? To associate the fd returned in sys_exit with the pathname in sys_enter.
+ */
+struct syscall {
+	struct event_format *tp_format;
+	int		    nr_args;
+	bool		    is_exit;
+	bool		    is_open;
+	struct format_field *args;
+	const char	    *name;
+	struct syscall_fmt  *fmt;
+	struct syscall_arg_fmt *arg_fmt;
+};
+
+/*
+ * We need to have this 'calculated' boolean because in some cases we really
+ * don't know what is the duration of a syscall, for instance, when we start
+ * a session and some threads are waiting for a syscall to finish, say 'poll',
+ * in which case all we can do is to print "( ? ) for duration and for the
+ * start timestamp.
+ */
+static size_t fprintf_duration(unsigned long t, bool calculated, FILE *fp)
+{
+	double duration = (double)t / NSEC_PER_MSEC;
+	size_t printed = fprintf(fp, "(");
+
+	if (!calculated)
+		printed += fprintf(fp, "         ");
+	else if (duration >= 1.0)
+		printed += color_fprintf(fp, PERF_COLOR_RED, "%6.3f ms", duration);
+	else if (duration >= 0.01)
+		printed += color_fprintf(fp, PERF_COLOR_YELLOW, "%6.3f ms", duration);
+	else
+		printed += color_fprintf(fp, PERF_COLOR_NORMAL, "%6.3f ms", duration);
+	return printed + fprintf(fp, "): ");
+}
+
+/**
+ * filename.ptr: The filename char pointer that will be vfs_getname'd
+ * filename.entry_str_pos: Where to insert the string translated from
+ *                         filename.ptr by the vfs_getname tracepoint/kprobe.
+ * ret_scnprintf: syscall args may set this to a different syscall return
+ *                formatter, for instance, fcntl may return fds, file flags, etc.
+ */
+struct thread_trace {
+	u64		  entry_time;
+	bool		  entry_pending;
+	unsigned long	  nr_events;
+	unsigned long	  pfmaj, pfmin;
+	char		  *entry_str;
+	double		  runtime_ms;
+	size_t		  (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg);
+        struct {
+		unsigned long ptr;
+		short int     entry_str_pos;
+		bool	      pending_open;
+		unsigned int  namelen;
+		char	      *name;
+	} filename;
+	struct {
+		int	  max;
+		char	  **table;
+	} paths;
+
+	struct intlist *syscall_stats;
+};
+
+static struct thread_trace *thread_trace__new(void)
+{
+	struct thread_trace *ttrace =  zalloc(sizeof(struct thread_trace));
+
+	if (ttrace)
+		ttrace->paths.max = -1;
+
+	ttrace->syscall_stats = intlist__new(NULL);
+
+	return ttrace;
+}
+
+static struct thread_trace *thread__trace(struct thread *thread, FILE *fp)
+{
+	struct thread_trace *ttrace;
+
+	if (thread == NULL)
+		goto fail;
+
+	if (thread__priv(thread) == NULL)
+		thread__set_priv(thread, thread_trace__new());
+
+	if (thread__priv(thread) == NULL)
+		goto fail;
+
+	ttrace = thread__priv(thread);
+	++ttrace->nr_events;
+
+	return ttrace;
+fail:
+	color_fprintf(fp, PERF_COLOR_RED,
+		      "WARNING: not enough memory, dropping samples!\n");
+	return NULL;
+}
+
+
+void syscall_arg__set_ret_scnprintf(struct syscall_arg *arg,
+				    size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg))
+{
+	struct thread_trace *ttrace = thread__priv(arg->thread);
+
+	ttrace->ret_scnprintf = ret_scnprintf;
+}
+
+#define TRACE_PFMAJ		(1 << 0)
+#define TRACE_PFMIN		(1 << 1)
+
+static const size_t trace__entry_str_size = 2048;
+
+static int trace__set_fd_pathname(struct thread *thread, int fd, const char *pathname)
+{
+	struct thread_trace *ttrace = thread__priv(thread);
+
+	if (fd > ttrace->paths.max) {
+		char **npath = realloc(ttrace->paths.table, (fd + 1) * sizeof(char *));
+
+		if (npath == NULL)
+			return -1;
+
+		if (ttrace->paths.max != -1) {
+			memset(npath + ttrace->paths.max + 1, 0,
+			       (fd - ttrace->paths.max) * sizeof(char *));
+		} else {
+			memset(npath, 0, (fd + 1) * sizeof(char *));
+		}
+
+		ttrace->paths.table = npath;
+		ttrace->paths.max   = fd;
+	}
+
+	ttrace->paths.table[fd] = strdup(pathname);
+
+	return ttrace->paths.table[fd] != NULL ? 0 : -1;
+}
+
+static int thread__read_fd_path(struct thread *thread, int fd)
+{
+	char linkname[PATH_MAX], pathname[PATH_MAX];
+	struct stat st;
+	int ret;
+
+	if (thread->pid_ == thread->tid) {
+		scnprintf(linkname, sizeof(linkname),
+			  "/proc/%d/fd/%d", thread->pid_, fd);
+	} else {
+		scnprintf(linkname, sizeof(linkname),
+			  "/proc/%d/task/%d/fd/%d", thread->pid_, thread->tid, fd);
+	}
+
+	if (lstat(linkname, &st) < 0 || st.st_size + 1 > (off_t)sizeof(pathname))
+		return -1;
+
+	ret = readlink(linkname, pathname, sizeof(pathname));
+
+	if (ret < 0 || ret > st.st_size)
+		return -1;
+
+	pathname[ret] = '\0';
+	return trace__set_fd_pathname(thread, fd, pathname);
+}
+
+static const char *thread__fd_path(struct thread *thread, int fd,
+				   struct trace *trace)
+{
+	struct thread_trace *ttrace = thread__priv(thread);
+
+	if (ttrace == NULL)
+		return NULL;
+
+	if (fd < 0)
+		return NULL;
+
+	if ((fd > ttrace->paths.max || ttrace->paths.table[fd] == NULL)) {
+		if (!trace->live)
+			return NULL;
+		++trace->stats.proc_getname;
+		if (thread__read_fd_path(thread, fd))
+			return NULL;
+	}
+
+	return ttrace->paths.table[fd];
+}
+
+size_t syscall_arg__scnprintf_fd(char *bf, size_t size, struct syscall_arg *arg)
+{
+	int fd = arg->val;
+	size_t printed = scnprintf(bf, size, "%d", fd);
+	const char *path = thread__fd_path(arg->thread, fd, arg->trace);
+
+	if (path)
+		printed += scnprintf(bf + printed, size - printed, "<%s>", path);
+
+	return printed;
+}
+
+size_t pid__scnprintf_fd(struct trace *trace, pid_t pid, int fd, char *bf, size_t size)
+{
+        size_t printed = scnprintf(bf, size, "%d", fd);
+	struct thread *thread = machine__find_thread(trace->host, pid, pid);
+
+	if (thread) {
+		const char *path = thread__fd_path(thread, fd, trace);
+
+		if (path)
+			printed += scnprintf(bf + printed, size - printed, "<%s>", path);
+
+		thread__put(thread);
+	}
+
+        return printed;
+}
+
+static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size,
+					      struct syscall_arg *arg)
+{
+	int fd = arg->val;
+	size_t printed = syscall_arg__scnprintf_fd(bf, size, arg);
+	struct thread_trace *ttrace = thread__priv(arg->thread);
+
+	if (ttrace && fd >= 0 && fd <= ttrace->paths.max)
+		zfree(&ttrace->paths.table[fd]);
+
+	return printed;
+}
+
+static void thread__set_filename_pos(struct thread *thread, const char *bf,
+				     unsigned long ptr)
+{
+	struct thread_trace *ttrace = thread__priv(thread);
+
+	ttrace->filename.ptr = ptr;
+	ttrace->filename.entry_str_pos = bf - ttrace->entry_str;
+}
+
+static size_t syscall_arg__scnprintf_filename(char *bf, size_t size,
+					      struct syscall_arg *arg)
+{
+	unsigned long ptr = arg->val;
+
+	if (!arg->trace->vfs_getname)
+		return scnprintf(bf, size, "%#x", ptr);
+
+	thread__set_filename_pos(arg->thread, bf, ptr);
+	return 0;
+}
+
+static bool trace__filter_duration(struct trace *trace, double t)
+{
+	return t < (trace->duration_filter * NSEC_PER_MSEC);
+}
+
+static size_t __trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp)
+{
+	double ts = (double)(tstamp - trace->base_time) / NSEC_PER_MSEC;
+
+	return fprintf(fp, "%10.3f ", ts);
+}
+
+/*
+ * We're handling tstamp=0 as an undefined tstamp, i.e. like when we are
+ * using ttrace->entry_time for a thread that receives a sys_exit without
+ * first having received a sys_enter ("poll" issued before tracing session
+ * starts, lost sys_enter exit due to ring buffer overflow).
+ */
+static size_t trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp)
+{
+	if (tstamp > 0)
+		return __trace__fprintf_tstamp(trace, tstamp, fp);
+
+	return fprintf(fp, "         ? ");
+}
+
+static bool done = false;
+static bool interrupted = false;
+
+static void sig_handler(int sig)
+{
+	done = true;
+	interrupted = sig == SIGINT;
+}
+
+static size_t trace__fprintf_entry_head(struct trace *trace, struct thread *thread,
+					u64 duration, bool duration_calculated, u64 tstamp, FILE *fp)
+{
+	size_t printed = trace__fprintf_tstamp(trace, tstamp, fp);
+	printed += fprintf_duration(duration, duration_calculated, fp);
+
+	if (trace->multiple_threads) {
+		if (trace->show_comm)
+			printed += fprintf(fp, "%.14s/", thread__comm_str(thread));
+		printed += fprintf(fp, "%d ", thread->tid);
+	}
+
+	return printed;
+}
+
+static int trace__process_event(struct trace *trace, struct machine *machine,
+				union perf_event *event, struct perf_sample *sample)
+{
+	int ret = 0;
+
+	switch (event->header.type) {
+	case PERF_RECORD_LOST:
+		color_fprintf(trace->output, PERF_COLOR_RED,
+			      "LOST %" PRIu64 " events!\n", event->lost.lost);
+		ret = machine__process_lost_event(machine, event, sample);
+		break;
+	default:
+		ret = machine__process_event(machine, event, sample);
+		break;
+	}
+
+	return ret;
+}
+
+static int trace__tool_process(struct perf_tool *tool,
+			       union perf_event *event,
+			       struct perf_sample *sample,
+			       struct machine *machine)
+{
+	struct trace *trace = container_of(tool, struct trace, tool);
+	return trace__process_event(trace, machine, event, sample);
+}
+
+static char *trace__machine__resolve_kernel_addr(void *vmachine, unsigned long long *addrp, char **modp)
+{
+	struct machine *machine = vmachine;
+
+	if (machine->kptr_restrict_warned)
+		return NULL;
+
+	if (symbol_conf.kptr_restrict) {
+		pr_warning("Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n"
+			   "Check /proc/sys/kernel/kptr_restrict.\n\n"
+			   "Kernel samples will not be resolved.\n");
+		machine->kptr_restrict_warned = true;
+		return NULL;
+	}
+
+	return machine__resolve_kernel_addr(vmachine, addrp, modp);
+}
+
+static int trace__symbols_init(struct trace *trace, struct perf_evlist *evlist)
+{
+	int err = symbol__init(NULL);
+
+	if (err)
+		return err;
+
+	trace->host = machine__new_host();
+	if (trace->host == NULL)
+		return -ENOMEM;
+
+	err = trace_event__register_resolver(trace->host, trace__machine__resolve_kernel_addr);
+	if (err < 0)
+		goto out;
+
+	err = __machine__synthesize_threads(trace->host, &trace->tool, &trace->opts.target,
+					    evlist->threads, trace__tool_process, false,
+					    trace->opts.proc_map_timeout, 1);
+out:
+	if (err)
+		symbol__exit();
+
+	return err;
+}
+
+static void trace__symbols__exit(struct trace *trace)
+{
+	machine__exit(trace->host);
+	trace->host = NULL;
+
+	symbol__exit();
+}
+
+static int syscall__alloc_arg_fmts(struct syscall *sc, int nr_args)
+{
+	int idx;
+
+	if (nr_args == 6 && sc->fmt && sc->fmt->nr_args != 0)
+		nr_args = sc->fmt->nr_args;
+
+	sc->arg_fmt = calloc(nr_args, sizeof(*sc->arg_fmt));
+	if (sc->arg_fmt == NULL)
+		return -1;
+
+	for (idx = 0; idx < nr_args; ++idx) {
+		if (sc->fmt)
+			sc->arg_fmt[idx] = sc->fmt->arg[idx];
+	}
+
+	sc->nr_args = nr_args;
+	return 0;
+}
+
+static int syscall__set_arg_fmts(struct syscall *sc)
+{
+	struct format_field *field;
+	int idx = 0, len;
+
+	for (field = sc->args; field; field = field->next, ++idx) {
+		if (sc->fmt && sc->fmt->arg[idx].scnprintf)
+			continue;
+
+		if (strcmp(field->type, "const char *") == 0 &&
+			 (strcmp(field->name, "filename") == 0 ||
+			  strcmp(field->name, "path") == 0 ||
+			  strcmp(field->name, "pathname") == 0))
+			sc->arg_fmt[idx].scnprintf = SCA_FILENAME;
+		else if (field->flags & FIELD_IS_POINTER)
+			sc->arg_fmt[idx].scnprintf = syscall_arg__scnprintf_hex;
+		else if (strcmp(field->type, "pid_t") == 0)
+			sc->arg_fmt[idx].scnprintf = SCA_PID;
+		else if (strcmp(field->type, "umode_t") == 0)
+			sc->arg_fmt[idx].scnprintf = SCA_MODE_T;
+		else if ((strcmp(field->type, "int") == 0 ||
+			  strcmp(field->type, "unsigned int") == 0 ||
+			  strcmp(field->type, "long") == 0) &&
+			 (len = strlen(field->name)) >= 2 &&
+			 strcmp(field->name + len - 2, "fd") == 0) {
+			/*
+			 * /sys/kernel/tracing/events/syscalls/sys_enter*
+			 * egrep 'field:.*fd;' .../format|sed -r 's/.*field:([a-z ]+) [a-z_]*fd.+/\1/g'|sort|uniq -c
+			 * 65 int
+			 * 23 unsigned int
+			 * 7 unsigned long
+			 */
+			sc->arg_fmt[idx].scnprintf = SCA_FD;
+		}
+	}
+
+	return 0;
+}
+
+static int trace__read_syscall_info(struct trace *trace, int id)
+{
+	char tp_name[128];
+	struct syscall *sc;
+	const char *name = syscalltbl__name(trace->sctbl, id);
+
+	if (name == NULL)
+		return -1;
+
+	if (id > trace->syscalls.max) {
+		struct syscall *nsyscalls = realloc(trace->syscalls.table, (id + 1) * sizeof(*sc));
+
+		if (nsyscalls == NULL)
+			return -1;
+
+		if (trace->syscalls.max != -1) {
+			memset(nsyscalls + trace->syscalls.max + 1, 0,
+			       (id - trace->syscalls.max) * sizeof(*sc));
+		} else {
+			memset(nsyscalls, 0, (id + 1) * sizeof(*sc));
+		}
+
+		trace->syscalls.table = nsyscalls;
+		trace->syscalls.max   = id;
+	}
+
+	sc = trace->syscalls.table + id;
+	sc->name = name;
+
+	sc->fmt  = syscall_fmt__find(sc->name);
+
+	snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->name);
+	sc->tp_format = trace_event__tp_format("syscalls", tp_name);
+
+	if (IS_ERR(sc->tp_format) && sc->fmt && sc->fmt->alias) {
+		snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->fmt->alias);
+		sc->tp_format = trace_event__tp_format("syscalls", tp_name);
+	}
+
+	if (syscall__alloc_arg_fmts(sc, IS_ERR(sc->tp_format) ? 6 : sc->tp_format->format.nr_fields))
+		return -1;
+
+	if (IS_ERR(sc->tp_format))
+		return -1;
+
+	sc->args = sc->tp_format->format.fields;
+	/*
+	 * We need to check and discard the first variable '__syscall_nr'
+	 * or 'nr' that mean the syscall number. It is needless here.
+	 * So drop '__syscall_nr' or 'nr' field but does not exist on older kernels.
+	 */
+	if (sc->args && (!strcmp(sc->args->name, "__syscall_nr") || !strcmp(sc->args->name, "nr"))) {
+		sc->args = sc->args->next;
+		--sc->nr_args;
+	}
+
+	sc->is_exit = !strcmp(name, "exit_group") || !strcmp(name, "exit");
+	sc->is_open = !strcmp(name, "open") || !strcmp(name, "openat");
+
+	return syscall__set_arg_fmts(sc);
+}
+
+static int trace__validate_ev_qualifier(struct trace *trace)
+{
+	int err = 0, i;
+	size_t nr_allocated;
+	struct str_node *pos;
+
+	trace->ev_qualifier_ids.nr = strlist__nr_entries(trace->ev_qualifier);
+	trace->ev_qualifier_ids.entries = malloc(trace->ev_qualifier_ids.nr *
+						 sizeof(trace->ev_qualifier_ids.entries[0]));
+
+	if (trace->ev_qualifier_ids.entries == NULL) {
+		fputs("Error:\tNot enough memory for allocating events qualifier ids\n",
+		       trace->output);
+		err = -EINVAL;
+		goto out;
+	}
+
+	nr_allocated = trace->ev_qualifier_ids.nr;
+	i = 0;
+
+	strlist__for_each_entry(pos, trace->ev_qualifier) {
+		const char *sc = pos->s;
+		int id = syscalltbl__id(trace->sctbl, sc), match_next = -1;
+
+		if (id < 0) {
+			id = syscalltbl__strglobmatch_first(trace->sctbl, sc, &match_next);
+			if (id >= 0)
+				goto matches;
+
+			if (err == 0) {
+				fputs("Error:\tInvalid syscall ", trace->output);
+				err = -EINVAL;
+			} else {
+				fputs(", ", trace->output);
+			}
+
+			fputs(sc, trace->output);
+		}
+matches:
+		trace->ev_qualifier_ids.entries[i++] = id;
+		if (match_next == -1)
+			continue;
+
+		while (1) {
+			id = syscalltbl__strglobmatch_next(trace->sctbl, sc, &match_next);
+			if (id < 0)
+				break;
+			if (nr_allocated == trace->ev_qualifier_ids.nr) {
+				void *entries;
+
+				nr_allocated += 8;
+				entries = realloc(trace->ev_qualifier_ids.entries,
+						  nr_allocated * sizeof(trace->ev_qualifier_ids.entries[0]));
+				if (entries == NULL) {
+					err = -ENOMEM;
+					fputs("\nError:\t Not enough memory for parsing\n", trace->output);
+					goto out_free;
+				}
+				trace->ev_qualifier_ids.entries = entries;
+			}
+			trace->ev_qualifier_ids.nr++;
+			trace->ev_qualifier_ids.entries[i++] = id;
+		}
+	}
+
+	if (err < 0) {
+		fputs("\nHint:\ttry 'perf list syscalls:sys_enter_*'"
+		      "\nHint:\tand: 'man syscalls'\n", trace->output);
+out_free:
+		zfree(&trace->ev_qualifier_ids.entries);
+		trace->ev_qualifier_ids.nr = 0;
+	}
+out:
+	return err;
+}
+
+/*
+ * args is to be interpreted as a series of longs but we need to handle
+ * 8-byte unaligned accesses. args points to raw_data within the event
+ * and raw_data is guaranteed to be 8-byte unaligned because it is
+ * preceded by raw_size which is a u32. So we need to copy args to a temp
+ * variable to read it. Most notably this avoids extended load instructions
+ * on unaligned addresses
+ */
+unsigned long syscall_arg__val(struct syscall_arg *arg, u8 idx)
+{
+	unsigned long val;
+	unsigned char *p = arg->args + sizeof(unsigned long) * idx;
+
+	memcpy(&val, p, sizeof(val));
+	return val;
+}
+
+static size_t syscall__scnprintf_name(struct syscall *sc, char *bf, size_t size,
+				      struct syscall_arg *arg)
+{
+	if (sc->arg_fmt && sc->arg_fmt[arg->idx].name)
+		return scnprintf(bf, size, "%s: ", sc->arg_fmt[arg->idx].name);
+
+	return scnprintf(bf, size, "arg%d: ", arg->idx);
+}
+
+static size_t syscall__scnprintf_val(struct syscall *sc, char *bf, size_t size,
+				     struct syscall_arg *arg, unsigned long val)
+{
+	if (sc->arg_fmt && sc->arg_fmt[arg->idx].scnprintf) {
+		arg->val = val;
+		if (sc->arg_fmt[arg->idx].parm)
+			arg->parm = sc->arg_fmt[arg->idx].parm;
+		return sc->arg_fmt[arg->idx].scnprintf(bf, size, arg);
+	}
+	return scnprintf(bf, size, "%ld", val);
+}
+
+static size_t syscall__scnprintf_args(struct syscall *sc, char *bf, size_t size,
+				      unsigned char *args, struct trace *trace,
+				      struct thread *thread)
+{
+	size_t printed = 0;
+	unsigned long val;
+	u8 bit = 1;
+	struct syscall_arg arg = {
+		.args	= args,
+		.idx	= 0,
+		.mask	= 0,
+		.trace  = trace,
+		.thread = thread,
+	};
+	struct thread_trace *ttrace = thread__priv(thread);
+
+	/*
+	 * Things like fcntl will set this in its 'cmd' formatter to pick the
+	 * right formatter for the return value (an fd? file flags?), which is
+	 * not needed for syscalls that always return a given type, say an fd.
+	 */
+	ttrace->ret_scnprintf = NULL;
+
+	if (sc->args != NULL) {
+		struct format_field *field;
+
+		for (field = sc->args; field;
+		     field = field->next, ++arg.idx, bit <<= 1) {
+			if (arg.mask & bit)
+				continue;
+
+			val = syscall_arg__val(&arg, arg.idx);
+
+			/*
+ 			 * Suppress this argument if its value is zero and
+ 			 * and we don't have a string associated in an
+ 			 * strarray for it.
+ 			 */
+			if (val == 0 &&
+			    !(sc->arg_fmt &&
+			      (sc->arg_fmt[arg.idx].show_zero ||
+			       sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAY ||
+			       sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAYS) &&
+			      sc->arg_fmt[arg.idx].parm))
+				continue;
+
+			printed += scnprintf(bf + printed, size - printed,
+					     "%s%s: ", printed ? ", " : "", field->name);
+			printed += syscall__scnprintf_val(sc, bf + printed, size - printed, &arg, val);
+		}
+	} else if (IS_ERR(sc->tp_format)) {
+		/*
+		 * If we managed to read the tracepoint /format file, then we
+		 * may end up not having any args, like with gettid(), so only
+		 * print the raw args when we didn't manage to read it.
+		 */
+		while (arg.idx < sc->nr_args) {
+			if (arg.mask & bit)
+				goto next_arg;
+			val = syscall_arg__val(&arg, arg.idx);
+			if (printed)
+				printed += scnprintf(bf + printed, size - printed, ", ");
+			printed += syscall__scnprintf_name(sc, bf + printed, size - printed, &arg);
+			printed += syscall__scnprintf_val(sc, bf + printed, size - printed, &arg, val);
+next_arg:
+			++arg.idx;
+			bit <<= 1;
+		}
+	}
+
+	return printed;
+}
+
+typedef int (*tracepoint_handler)(struct trace *trace, struct perf_evsel *evsel,
+				  union perf_event *event,
+				  struct perf_sample *sample);
+
+static struct syscall *trace__syscall_info(struct trace *trace,
+					   struct perf_evsel *evsel, int id)
+{
+
+	if (id < 0) {
+
+		/*
+		 * XXX: Noticed on x86_64, reproduced as far back as 3.0.36, haven't tried
+		 * before that, leaving at a higher verbosity level till that is
+		 * explained. Reproduced with plain ftrace with:
+		 *
+		 * echo 1 > /t/events/raw_syscalls/sys_exit/enable
+		 * grep "NR -1 " /t/trace_pipe
+		 *
+		 * After generating some load on the machine.
+ 		 */
+		if (verbose > 1) {
+			static u64 n;
+			fprintf(trace->output, "Invalid syscall %d id, skipping (%s, %" PRIu64 ") ...\n",
+				id, perf_evsel__name(evsel), ++n);
+		}
+		return NULL;
+	}
+
+	if ((id > trace->syscalls.max || trace->syscalls.table[id].name == NULL) &&
+	    trace__read_syscall_info(trace, id))
+		goto out_cant_read;
+
+	if ((id > trace->syscalls.max || trace->syscalls.table[id].name == NULL))
+		goto out_cant_read;
+
+	return &trace->syscalls.table[id];
+
+out_cant_read:
+	if (verbose > 0) {
+		fprintf(trace->output, "Problems reading syscall %d", id);
+		if (id <= trace->syscalls.max && trace->syscalls.table[id].name != NULL)
+			fprintf(trace->output, "(%s)", trace->syscalls.table[id].name);
+		fputs(" information\n", trace->output);
+	}
+	return NULL;
+}
+
+static void thread__update_stats(struct thread_trace *ttrace,
+				 int id, struct perf_sample *sample)
+{
+	struct int_node *inode;
+	struct stats *stats;
+	u64 duration = 0;
+
+	inode = intlist__findnew(ttrace->syscall_stats, id);
+	if (inode == NULL)
+		return;
+
+	stats = inode->priv;
+	if (stats == NULL) {
+		stats = malloc(sizeof(struct stats));
+		if (stats == NULL)
+			return;
+		init_stats(stats);
+		inode->priv = stats;
+	}
+
+	if (ttrace->entry_time && sample->time > ttrace->entry_time)
+		duration = sample->time - ttrace->entry_time;
+
+	update_stats(stats, duration);
+}
+
+static int trace__printf_interrupted_entry(struct trace *trace)
+{
+	struct thread_trace *ttrace;
+	size_t printed;
+
+	if (trace->failure_only || trace->current == NULL)
+		return 0;
+
+	ttrace = thread__priv(trace->current);
+
+	if (!ttrace->entry_pending)
+		return 0;
+
+	printed  = trace__fprintf_entry_head(trace, trace->current, 0, false, ttrace->entry_time, trace->output);
+	printed += fprintf(trace->output, "%-70s) ...\n", ttrace->entry_str);
+	ttrace->entry_pending = false;
+
+	return printed;
+}
+
+static int trace__fprintf_sample(struct trace *trace, struct perf_evsel *evsel,
+				 struct perf_sample *sample, struct thread *thread)
+{
+	int printed = 0;
+
+	if (trace->print_sample) {
+		double ts = (double)sample->time / NSEC_PER_MSEC;
+
+		printed += fprintf(trace->output, "%22s %10.3f %s %d/%d [%d]\n",
+				   perf_evsel__name(evsel), ts,
+				   thread__comm_str(thread),
+				   sample->pid, sample->tid, sample->cpu);
+	}
+
+	return printed;
+}
+
+static int trace__sys_enter(struct trace *trace, struct perf_evsel *evsel,
+			    union perf_event *event __maybe_unused,
+			    struct perf_sample *sample)
+{
+	char *msg;
+	void *args;
+	size_t printed = 0;
+	struct thread *thread;
+	int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1;
+	struct syscall *sc = trace__syscall_info(trace, evsel, id);
+	struct thread_trace *ttrace;
+
+	if (sc == NULL)
+		return -1;
+
+	thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
+	ttrace = thread__trace(thread, trace->output);
+	if (ttrace == NULL)
+		goto out_put;
+
+	trace__fprintf_sample(trace, evsel, sample, thread);
+
+	args = perf_evsel__sc_tp_ptr(evsel, args, sample);
+
+	if (ttrace->entry_str == NULL) {
+		ttrace->entry_str = malloc(trace__entry_str_size);
+		if (!ttrace->entry_str)
+			goto out_put;
+	}
+
+	if (!(trace->duration_filter || trace->summary_only || trace->min_stack))
+		trace__printf_interrupted_entry(trace);
+
+	ttrace->entry_time = sample->time;
+	msg = ttrace->entry_str;
+	printed += scnprintf(msg + printed, trace__entry_str_size - printed, "%s(", sc->name);
+
+	printed += syscall__scnprintf_args(sc, msg + printed, trace__entry_str_size - printed,
+					   args, trace, thread);
+
+	if (sc->is_exit) {
+		if (!(trace->duration_filter || trace->summary_only || trace->failure_only || trace->min_stack)) {
+			trace__fprintf_entry_head(trace, thread, 0, false, ttrace->entry_time, trace->output);
+			fprintf(trace->output, "%-70s)\n", ttrace->entry_str);
+		}
+	} else {
+		ttrace->entry_pending = true;
+		/* See trace__vfs_getname & trace__sys_exit */
+		ttrace->filename.pending_open = false;
+	}
+
+	if (trace->current != thread) {
+		thread__put(trace->current);
+		trace->current = thread__get(thread);
+	}
+	err = 0;
+out_put:
+	thread__put(thread);
+	return err;
+}
+
+static int trace__fprintf_sys_enter(struct trace *trace, struct perf_evsel *evsel,
+				    struct perf_sample *sample)
+{
+	struct thread_trace *ttrace;
+	struct thread *thread;
+	int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1;
+	struct syscall *sc = trace__syscall_info(trace, evsel, id);
+	char msg[1024];
+	void *args;
+
+	if (sc == NULL)
+		return -1;
+
+	thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
+	ttrace = thread__trace(thread, trace->output);
+	/*
+	 * We need to get ttrace just to make sure it is there when syscall__scnprintf_args()
+	 * and the rest of the beautifiers accessing it via struct syscall_arg touches it.
+	 */
+	if (ttrace == NULL)
+		goto out_put;
+
+	args = perf_evsel__sc_tp_ptr(evsel, args, sample);
+	syscall__scnprintf_args(sc, msg, sizeof(msg), args, trace, thread);
+	fprintf(trace->output, "%s", msg);
+	err = 0;
+out_put:
+	thread__put(thread);
+	return err;
+}
+
+static int trace__resolve_callchain(struct trace *trace, struct perf_evsel *evsel,
+				    struct perf_sample *sample,
+				    struct callchain_cursor *cursor)
+{
+	struct addr_location al;
+	int max_stack = evsel->attr.sample_max_stack ?
+			evsel->attr.sample_max_stack :
+			trace->max_stack;
+
+	if (machine__resolve(trace->host, &al, sample) < 0 ||
+	    thread__resolve_callchain(al.thread, cursor, evsel, sample, NULL, NULL, max_stack))
+		return -1;
+
+	return 0;
+}
+
+static int trace__fprintf_callchain(struct trace *trace, struct perf_sample *sample)
+{
+	/* TODO: user-configurable print_opts */
+	const unsigned int print_opts = EVSEL__PRINT_SYM |
+				        EVSEL__PRINT_DSO |
+				        EVSEL__PRINT_UNKNOWN_AS_ADDR;
+
+	return sample__fprintf_callchain(sample, 38, print_opts, &callchain_cursor, trace->output);
+}
+
+static const char *errno_to_name(struct perf_evsel *evsel, int err)
+{
+	struct perf_env *env = perf_evsel__env(evsel);
+	const char *arch_name = perf_env__arch(env);
+
+	return arch_syscalls__strerrno(arch_name, err);
+}
+
+static int trace__sys_exit(struct trace *trace, struct perf_evsel *evsel,
+			   union perf_event *event __maybe_unused,
+			   struct perf_sample *sample)
+{
+	long ret;
+	u64 duration = 0;
+	bool duration_calculated = false;
+	struct thread *thread;
+	int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1, callchain_ret = 0;
+	struct syscall *sc = trace__syscall_info(trace, evsel, id);
+	struct thread_trace *ttrace;
+
+	if (sc == NULL)
+		return -1;
+
+	thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
+	ttrace = thread__trace(thread, trace->output);
+	if (ttrace == NULL)
+		goto out_put;
+
+	trace__fprintf_sample(trace, evsel, sample, thread);
+
+	if (trace->summary)
+		thread__update_stats(ttrace, id, sample);
+
+	ret = perf_evsel__sc_tp_uint(evsel, ret, sample);
+
+	if (sc->is_open && ret >= 0 && ttrace->filename.pending_open) {
+		trace__set_fd_pathname(thread, ret, ttrace->filename.name);
+		ttrace->filename.pending_open = false;
+		++trace->stats.vfs_getname;
+	}
+
+	if (ttrace->entry_time) {
+		duration = sample->time - ttrace->entry_time;
+		if (trace__filter_duration(trace, duration))
+			goto out;
+		duration_calculated = true;
+	} else if (trace->duration_filter)
+		goto out;
+
+	if (sample->callchain) {
+		callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor);
+		if (callchain_ret == 0) {
+			if (callchain_cursor.nr < trace->min_stack)
+				goto out;
+			callchain_ret = 1;
+		}
+	}
+
+	if (trace->summary_only || (ret >= 0 && trace->failure_only))
+		goto out;
+
+	trace__fprintf_entry_head(trace, thread, duration, duration_calculated, ttrace->entry_time, trace->output);
+
+	if (ttrace->entry_pending) {
+		fprintf(trace->output, "%-70s", ttrace->entry_str);
+	} else {
+		fprintf(trace->output, " ... [");
+		color_fprintf(trace->output, PERF_COLOR_YELLOW, "continued");
+		fprintf(trace->output, "]: %s()", sc->name);
+	}
+
+	if (sc->fmt == NULL) {
+		if (ret < 0)
+			goto errno_print;
+signed_print:
+		fprintf(trace->output, ") = %ld", ret);
+	} else if (ret < 0) {
+errno_print: {
+		char bf[STRERR_BUFSIZE];
+		const char *emsg = str_error_r(-ret, bf, sizeof(bf)),
+			   *e = errno_to_name(evsel, -ret);
+
+		fprintf(trace->output, ") = -1 %s %s", e, emsg);
+	}
+	} else if (ret == 0 && sc->fmt->timeout)
+		fprintf(trace->output, ") = 0 Timeout");
+	else if (ttrace->ret_scnprintf) {
+		char bf[1024];
+		struct syscall_arg arg = {
+			.val	= ret,
+			.thread	= thread,
+			.trace	= trace,
+		};
+		ttrace->ret_scnprintf(bf, sizeof(bf), &arg);
+		ttrace->ret_scnprintf = NULL;
+		fprintf(trace->output, ") = %s", bf);
+	} else if (sc->fmt->hexret)
+		fprintf(trace->output, ") = %#lx", ret);
+	else if (sc->fmt->errpid) {
+		struct thread *child = machine__find_thread(trace->host, ret, ret);
+
+		if (child != NULL) {
+			fprintf(trace->output, ") = %ld", ret);
+			if (child->comm_set)
+				fprintf(trace->output, " (%s)", thread__comm_str(child));
+			thread__put(child);
+		}
+	} else
+		goto signed_print;
+
+	fputc('\n', trace->output);
+
+	if (callchain_ret > 0)
+		trace__fprintf_callchain(trace, sample);
+	else if (callchain_ret < 0)
+		pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel));
+out:
+	ttrace->entry_pending = false;
+	err = 0;
+out_put:
+	thread__put(thread);
+	return err;
+}
+
+static int trace__vfs_getname(struct trace *trace, struct perf_evsel *evsel,
+			      union perf_event *event __maybe_unused,
+			      struct perf_sample *sample)
+{
+	struct thread *thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
+	struct thread_trace *ttrace;
+	size_t filename_len, entry_str_len, to_move;
+	ssize_t remaining_space;
+	char *pos;
+	const char *filename = perf_evsel__rawptr(evsel, sample, "pathname");
+
+	if (!thread)
+		goto out;
+
+	ttrace = thread__priv(thread);
+	if (!ttrace)
+		goto out_put;
+
+	filename_len = strlen(filename);
+	if (filename_len == 0)
+		goto out_put;
+
+	if (ttrace->filename.namelen < filename_len) {
+		char *f = realloc(ttrace->filename.name, filename_len + 1);
+
+		if (f == NULL)
+			goto out_put;
+
+		ttrace->filename.namelen = filename_len;
+		ttrace->filename.name = f;
+	}
+
+	strcpy(ttrace->filename.name, filename);
+	ttrace->filename.pending_open = true;
+
+	if (!ttrace->filename.ptr)
+		goto out_put;
+
+	entry_str_len = strlen(ttrace->entry_str);
+	remaining_space = trace__entry_str_size - entry_str_len - 1; /* \0 */
+	if (remaining_space <= 0)
+		goto out_put;
+
+	if (filename_len > (size_t)remaining_space) {
+		filename += filename_len - remaining_space;
+		filename_len = remaining_space;
+	}
+
+	to_move = entry_str_len - ttrace->filename.entry_str_pos + 1; /* \0 */
+	pos = ttrace->entry_str + ttrace->filename.entry_str_pos;
+	memmove(pos + filename_len, pos, to_move);
+	memcpy(pos, filename, filename_len);
+
+	ttrace->filename.ptr = 0;
+	ttrace->filename.entry_str_pos = 0;
+out_put:
+	thread__put(thread);
+out:
+	return 0;
+}
+
+static int trace__sched_stat_runtime(struct trace *trace, struct perf_evsel *evsel,
+				     union perf_event *event __maybe_unused,
+				     struct perf_sample *sample)
+{
+        u64 runtime = perf_evsel__intval(evsel, sample, "runtime");
+	double runtime_ms = (double)runtime / NSEC_PER_MSEC;
+	struct thread *thread = machine__findnew_thread(trace->host,
+							sample->pid,
+							sample->tid);
+	struct thread_trace *ttrace = thread__trace(thread, trace->output);
+
+	if (ttrace == NULL)
+		goto out_dump;
+
+	ttrace->runtime_ms += runtime_ms;
+	trace->runtime_ms += runtime_ms;
+out_put:
+	thread__put(thread);
+	return 0;
+
+out_dump:
+	fprintf(trace->output, "%s: comm=%s,pid=%u,runtime=%" PRIu64 ",vruntime=%" PRIu64 ")\n",
+	       evsel->name,
+	       perf_evsel__strval(evsel, sample, "comm"),
+	       (pid_t)perf_evsel__intval(evsel, sample, "pid"),
+	       runtime,
+	       perf_evsel__intval(evsel, sample, "vruntime"));
+	goto out_put;
+}
+
+static int bpf_output__printer(enum binary_printer_ops op,
+			       unsigned int val, void *extra __maybe_unused, FILE *fp)
+{
+	unsigned char ch = (unsigned char)val;
+
+	switch (op) {
+	case BINARY_PRINT_CHAR_DATA:
+		return fprintf(fp, "%c", isprint(ch) ? ch : '.');
+	case BINARY_PRINT_DATA_BEGIN:
+	case BINARY_PRINT_LINE_BEGIN:
+	case BINARY_PRINT_ADDR:
+	case BINARY_PRINT_NUM_DATA:
+	case BINARY_PRINT_NUM_PAD:
+	case BINARY_PRINT_SEP:
+	case BINARY_PRINT_CHAR_PAD:
+	case BINARY_PRINT_LINE_END:
+	case BINARY_PRINT_DATA_END:
+	default:
+		break;
+	}
+
+	return 0;
+}
+
+static void bpf_output__fprintf(struct trace *trace,
+				struct perf_sample *sample)
+{
+	binary__fprintf(sample->raw_data, sample->raw_size, 8,
+			bpf_output__printer, NULL, trace->output);
+}
+
+static int trace__event_handler(struct trace *trace, struct perf_evsel *evsel,
+				union perf_event *event __maybe_unused,
+				struct perf_sample *sample)
+{
+	int callchain_ret = 0;
+
+	if (sample->callchain) {
+		callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor);
+		if (callchain_ret == 0) {
+			if (callchain_cursor.nr < trace->min_stack)
+				goto out;
+			callchain_ret = 1;
+		}
+	}
+
+	trace__printf_interrupted_entry(trace);
+	trace__fprintf_tstamp(trace, sample->time, trace->output);
+
+	if (trace->trace_syscalls)
+		fprintf(trace->output, "(         ): ");
+
+	fprintf(trace->output, "%s:", evsel->name);
+
+	if (perf_evsel__is_bpf_output(evsel)) {
+		if (evsel == trace->syscalls.events.augmented)
+			trace__fprintf_sys_enter(trace, evsel, sample);
+		else
+			bpf_output__fprintf(trace, sample);
+	} else if (evsel->tp_format) {
+		if (strncmp(evsel->tp_format->name, "sys_enter_", 10) ||
+		    trace__fprintf_sys_enter(trace, evsel, sample)) {
+			event_format__fprintf(evsel->tp_format, sample->cpu,
+					      sample->raw_data, sample->raw_size,
+					      trace->output);
+		}
+	}
+
+	fprintf(trace->output, "\n");
+
+	if (callchain_ret > 0)
+		trace__fprintf_callchain(trace, sample);
+	else if (callchain_ret < 0)
+		pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel));
+out:
+	return 0;
+}
+
+static void print_location(FILE *f, struct perf_sample *sample,
+			   struct addr_location *al,
+			   bool print_dso, bool print_sym)
+{
+
+	if ((verbose > 0 || print_dso) && al->map)
+		fprintf(f, "%s@", al->map->dso->long_name);
+
+	if ((verbose > 0 || print_sym) && al->sym)
+		fprintf(f, "%s+0x%" PRIx64, al->sym->name,
+			al->addr - al->sym->start);
+	else if (al->map)
+		fprintf(f, "0x%" PRIx64, al->addr);
+	else
+		fprintf(f, "0x%" PRIx64, sample->addr);
+}
+
+static int trace__pgfault(struct trace *trace,
+			  struct perf_evsel *evsel,
+			  union perf_event *event __maybe_unused,
+			  struct perf_sample *sample)
+{
+	struct thread *thread;
+	struct addr_location al;
+	char map_type = 'd';
+	struct thread_trace *ttrace;
+	int err = -1;
+	int callchain_ret = 0;
+
+	thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
+
+	if (sample->callchain) {
+		callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor);
+		if (callchain_ret == 0) {
+			if (callchain_cursor.nr < trace->min_stack)
+				goto out_put;
+			callchain_ret = 1;
+		}
+	}
+
+	ttrace = thread__trace(thread, trace->output);
+	if (ttrace == NULL)
+		goto out_put;
+
+	if (evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ)
+		ttrace->pfmaj++;
+	else
+		ttrace->pfmin++;
+
+	if (trace->summary_only)
+		goto out;
+
+	thread__find_symbol(thread, sample->cpumode, sample->ip, &al);
+
+	trace__fprintf_entry_head(trace, thread, 0, true, sample->time, trace->output);
+
+	fprintf(trace->output, "%sfault [",
+		evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ?
+		"maj" : "min");
+
+	print_location(trace->output, sample, &al, false, true);
+
+	fprintf(trace->output, "] => ");
+
+	thread__find_symbol(thread, sample->cpumode, sample->addr, &al);
+
+	if (!al.map) {
+		thread__find_symbol(thread, sample->cpumode, sample->addr, &al);
+
+		if (al.map)
+			map_type = 'x';
+		else
+			map_type = '?';
+	}
+
+	print_location(trace->output, sample, &al, true, false);
+
+	fprintf(trace->output, " (%c%c)\n", map_type, al.level);
+
+	if (callchain_ret > 0)
+		trace__fprintf_callchain(trace, sample);
+	else if (callchain_ret < 0)
+		pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel));
+out:
+	err = 0;
+out_put:
+	thread__put(thread);
+	return err;
+}
+
+static void trace__set_base_time(struct trace *trace,
+				 struct perf_evsel *evsel,
+				 struct perf_sample *sample)
+{
+	/*
+	 * BPF events were not setting PERF_SAMPLE_TIME, so be more robust
+	 * and don't use sample->time unconditionally, we may end up having
+	 * some other event in the future without PERF_SAMPLE_TIME for good
+	 * reason, i.e. we may not be interested in its timestamps, just in
+	 * it taking place, picking some piece of information when it
+	 * appears in our event stream (vfs_getname comes to mind).
+	 */
+	if (trace->base_time == 0 && !trace->full_time &&
+	    (evsel->attr.sample_type & PERF_SAMPLE_TIME))
+		trace->base_time = sample->time;
+}
+
+static int trace__process_sample(struct perf_tool *tool,
+				 union perf_event *event,
+				 struct perf_sample *sample,
+				 struct perf_evsel *evsel,
+				 struct machine *machine __maybe_unused)
+{
+	struct trace *trace = container_of(tool, struct trace, tool);
+	struct thread *thread;
+	int err = 0;
+
+	tracepoint_handler handler = evsel->handler;
+
+	thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
+	if (thread && thread__is_filtered(thread))
+		goto out;
+
+	trace__set_base_time(trace, evsel, sample);
+
+	if (handler) {
+		++trace->nr_events;
+		handler(trace, evsel, event, sample);
+	}
+out:
+	thread__put(thread);
+	return err;
+}
+
+static int trace__record(struct trace *trace, int argc, const char **argv)
+{
+	unsigned int rec_argc, i, j;
+	const char **rec_argv;
+	const char * const record_args[] = {
+		"record",
+		"-R",
+		"-m", "1024",
+		"-c", "1",
+	};
+
+	const char * const sc_args[] = { "-e", };
+	unsigned int sc_args_nr = ARRAY_SIZE(sc_args);
+	const char * const majpf_args[] = { "-e", "major-faults" };
+	unsigned int majpf_args_nr = ARRAY_SIZE(majpf_args);
+	const char * const minpf_args[] = { "-e", "minor-faults" };
+	unsigned int minpf_args_nr = ARRAY_SIZE(minpf_args);
+
+	/* +1 is for the event string below */
+	rec_argc = ARRAY_SIZE(record_args) + sc_args_nr + 1 +
+		majpf_args_nr + minpf_args_nr + argc;
+	rec_argv = calloc(rec_argc + 1, sizeof(char *));
+
+	if (rec_argv == NULL)
+		return -ENOMEM;
+
+	j = 0;
+	for (i = 0; i < ARRAY_SIZE(record_args); i++)
+		rec_argv[j++] = record_args[i];
+
+	if (trace->trace_syscalls) {
+		for (i = 0; i < sc_args_nr; i++)
+			rec_argv[j++] = sc_args[i];
+
+		/* event string may be different for older kernels - e.g., RHEL6 */
+		if (is_valid_tracepoint("raw_syscalls:sys_enter"))
+			rec_argv[j++] = "raw_syscalls:sys_enter,raw_syscalls:sys_exit";
+		else if (is_valid_tracepoint("syscalls:sys_enter"))
+			rec_argv[j++] = "syscalls:sys_enter,syscalls:sys_exit";
+		else {
+			pr_err("Neither raw_syscalls nor syscalls events exist.\n");
+			free(rec_argv);
+			return -1;
+		}
+	}
+
+	if (trace->trace_pgfaults & TRACE_PFMAJ)
+		for (i = 0; i < majpf_args_nr; i++)
+			rec_argv[j++] = majpf_args[i];
+
+	if (trace->trace_pgfaults & TRACE_PFMIN)
+		for (i = 0; i < minpf_args_nr; i++)
+			rec_argv[j++] = minpf_args[i];
+
+	for (i = 0; i < (unsigned int)argc; i++)
+		rec_argv[j++] = argv[i];
+
+	return cmd_record(j, rec_argv);
+}
+
+static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp);
+
+static bool perf_evlist__add_vfs_getname(struct perf_evlist *evlist)
+{
+	bool found = false;
+	struct perf_evsel *evsel, *tmp;
+	struct parse_events_error err = { .idx = 0, };
+	int ret = parse_events(evlist, "probe:vfs_getname*", &err);
+
+	if (ret)
+		return false;
+
+	evlist__for_each_entry_safe(evlist, evsel, tmp) {
+		if (!strstarts(perf_evsel__name(evsel), "probe:vfs_getname"))
+			continue;
+
+		if (perf_evsel__field(evsel, "pathname")) {
+			evsel->handler = trace__vfs_getname;
+			found = true;
+			continue;
+		}
+
+		list_del_init(&evsel->node);
+		evsel->evlist = NULL;
+		perf_evsel__delete(evsel);
+	}
+
+	return found;
+}
+
+static struct perf_evsel *perf_evsel__new_pgfault(u64 config)
+{
+	struct perf_evsel *evsel;
+	struct perf_event_attr attr = {
+		.type = PERF_TYPE_SOFTWARE,
+		.mmap_data = 1,
+	};
+
+	attr.config = config;
+	attr.sample_period = 1;
+
+	event_attr_init(&attr);
+
+	evsel = perf_evsel__new(&attr);
+	if (evsel)
+		evsel->handler = trace__pgfault;
+
+	return evsel;
+}
+
+static void trace__handle_event(struct trace *trace, union perf_event *event, struct perf_sample *sample)
+{
+	const u32 type = event->header.type;
+	struct perf_evsel *evsel;
+
+	if (type != PERF_RECORD_SAMPLE) {
+		trace__process_event(trace, trace->host, event, sample);
+		return;
+	}
+
+	evsel = perf_evlist__id2evsel(trace->evlist, sample->id);
+	if (evsel == NULL) {
+		fprintf(trace->output, "Unknown tp ID %" PRIu64 ", skipping...\n", sample->id);
+		return;
+	}
+
+	trace__set_base_time(trace, evsel, sample);
+
+	if (evsel->attr.type == PERF_TYPE_TRACEPOINT &&
+	    sample->raw_data == NULL) {
+		fprintf(trace->output, "%s sample with no payload for tid: %d, cpu %d, raw_size=%d, skipping...\n",
+		       perf_evsel__name(evsel), sample->tid,
+		       sample->cpu, sample->raw_size);
+	} else {
+		tracepoint_handler handler = evsel->handler;
+		handler(trace, evsel, event, sample);
+	}
+}
+
+static int trace__add_syscall_newtp(struct trace *trace)
+{
+	int ret = -1;
+	struct perf_evlist *evlist = trace->evlist;
+	struct perf_evsel *sys_enter, *sys_exit;
+
+	sys_enter = perf_evsel__raw_syscall_newtp("sys_enter", trace__sys_enter);
+	if (sys_enter == NULL)
+		goto out;
+
+	if (perf_evsel__init_sc_tp_ptr_field(sys_enter, args))
+		goto out_delete_sys_enter;
+
+	sys_exit = perf_evsel__raw_syscall_newtp("sys_exit", trace__sys_exit);
+	if (sys_exit == NULL)
+		goto out_delete_sys_enter;
+
+	if (perf_evsel__init_sc_tp_uint_field(sys_exit, ret))
+		goto out_delete_sys_exit;
+
+	perf_evsel__config_callchain(sys_enter, &trace->opts, &callchain_param);
+	perf_evsel__config_callchain(sys_exit, &trace->opts, &callchain_param);
+
+	perf_evlist__add(evlist, sys_enter);
+	perf_evlist__add(evlist, sys_exit);
+
+	if (callchain_param.enabled && !trace->kernel_syscallchains) {
+		/*
+		 * We're interested only in the user space callchain
+		 * leading to the syscall, allow overriding that for
+		 * debugging reasons using --kernel_syscall_callchains
+		 */
+		sys_exit->attr.exclude_callchain_kernel = 1;
+	}
+
+	trace->syscalls.events.sys_enter = sys_enter;
+	trace->syscalls.events.sys_exit  = sys_exit;
+
+	ret = 0;
+out:
+	return ret;
+
+out_delete_sys_exit:
+	perf_evsel__delete_priv(sys_exit);
+out_delete_sys_enter:
+	perf_evsel__delete_priv(sys_enter);
+	goto out;
+}
+
+static int trace__set_ev_qualifier_filter(struct trace *trace)
+{
+	int err = -1;
+	struct perf_evsel *sys_exit;
+	char *filter = asprintf_expr_inout_ints("id", !trace->not_ev_qualifier,
+						trace->ev_qualifier_ids.nr,
+						trace->ev_qualifier_ids.entries);
+
+	if (filter == NULL)
+		goto out_enomem;
+
+	if (!perf_evsel__append_tp_filter(trace->syscalls.events.sys_enter,
+					  filter)) {
+		sys_exit = trace->syscalls.events.sys_exit;
+		err = perf_evsel__append_tp_filter(sys_exit, filter);
+	}
+
+	free(filter);
+out:
+	return err;
+out_enomem:
+	errno = ENOMEM;
+	goto out;
+}
+
+static int trace__set_filter_loop_pids(struct trace *trace)
+{
+	unsigned int nr = 1;
+	pid_t pids[32] = {
+		getpid(),
+	};
+	struct thread *thread = machine__find_thread(trace->host, pids[0], pids[0]);
+
+	while (thread && nr < ARRAY_SIZE(pids)) {
+		struct thread *parent = machine__find_thread(trace->host, thread->ppid, thread->ppid);
+
+		if (parent == NULL)
+			break;
+
+		if (!strcmp(thread__comm_str(parent), "sshd")) {
+			pids[nr++] = parent->tid;
+			break;
+		}
+		thread = parent;
+	}
+
+	return perf_evlist__set_filter_pids(trace->evlist, nr, pids);
+}
+
+static int trace__run(struct trace *trace, int argc, const char **argv)
+{
+	struct perf_evlist *evlist = trace->evlist;
+	struct perf_evsel *evsel, *pgfault_maj = NULL, *pgfault_min = NULL;
+	int err = -1, i;
+	unsigned long before;
+	const bool forks = argc > 0;
+	bool draining = false;
+
+	trace->live = true;
+
+	if (trace->trace_syscalls && trace__add_syscall_newtp(trace))
+		goto out_error_raw_syscalls;
+
+	if (trace->trace_syscalls)
+		trace->vfs_getname = perf_evlist__add_vfs_getname(evlist);
+
+	if ((trace->trace_pgfaults & TRACE_PFMAJ)) {
+		pgfault_maj = perf_evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MAJ);
+		if (pgfault_maj == NULL)
+			goto out_error_mem;
+		perf_evsel__config_callchain(pgfault_maj, &trace->opts, &callchain_param);
+		perf_evlist__add(evlist, pgfault_maj);
+	}
+
+	if ((trace->trace_pgfaults & TRACE_PFMIN)) {
+		pgfault_min = perf_evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MIN);
+		if (pgfault_min == NULL)
+			goto out_error_mem;
+		perf_evsel__config_callchain(pgfault_min, &trace->opts, &callchain_param);
+		perf_evlist__add(evlist, pgfault_min);
+	}
+
+	if (trace->sched &&
+	    perf_evlist__add_newtp(evlist, "sched", "sched_stat_runtime",
+				   trace__sched_stat_runtime))
+		goto out_error_sched_stat_runtime;
+
+	/*
+	 * If a global cgroup was set, apply it to all the events without an
+	 * explicit cgroup. I.e.:
+	 *
+	 * 	trace -G A -e sched:*switch
+	 *
+	 * Will set all raw_syscalls:sys_{enter,exit}, pgfault, vfs_getname, etc
+	 * _and_ sched:sched_switch to the 'A' cgroup, while:
+	 *
+	 * trace -e sched:*switch -G A
+	 *
+	 * will only set the sched:sched_switch event to the 'A' cgroup, all the
+	 * other events (raw_syscalls:sys_{enter,exit}, etc are left "without"
+	 * a cgroup (on the root cgroup, sys wide, etc).
+	 *
+	 * Multiple cgroups:
+	 *
+	 * trace -G A -e sched:*switch -G B
+	 *
+	 * the syscall ones go to the 'A' cgroup, the sched:sched_switch goes
+	 * to the 'B' cgroup.
+	 *
+	 * evlist__set_default_cgroup() grabs a reference of the passed cgroup
+	 * only for the evsels still without a cgroup, i.e. evsel->cgroup == NULL.
+	 */
+	if (trace->cgroup)
+		evlist__set_default_cgroup(trace->evlist, trace->cgroup);
+
+	err = perf_evlist__create_maps(evlist, &trace->opts.target);
+	if (err < 0) {
+		fprintf(trace->output, "Problems parsing the target to trace, check your options!\n");
+		goto out_delete_evlist;
+	}
+
+	err = trace__symbols_init(trace, evlist);
+	if (err < 0) {
+		fprintf(trace->output, "Problems initializing symbol libraries!\n");
+		goto out_delete_evlist;
+	}
+
+	perf_evlist__config(evlist, &trace->opts, &callchain_param);
+
+	signal(SIGCHLD, sig_handler);
+	signal(SIGINT, sig_handler);
+
+	if (forks) {
+		err = perf_evlist__prepare_workload(evlist, &trace->opts.target,
+						    argv, false, NULL);
+		if (err < 0) {
+			fprintf(trace->output, "Couldn't run the workload!\n");
+			goto out_delete_evlist;
+		}
+	}
+
+	err = perf_evlist__open(evlist);
+	if (err < 0)
+		goto out_error_open;
+
+	err = bpf__apply_obj_config();
+	if (err) {
+		char errbuf[BUFSIZ];
+
+		bpf__strerror_apply_obj_config(err, errbuf, sizeof(errbuf));
+		pr_err("ERROR: Apply config to BPF failed: %s\n",
+			 errbuf);
+		goto out_error_open;
+	}
+
+	/*
+	 * Better not use !target__has_task() here because we need to cover the
+	 * case where no threads were specified in the command line, but a
+	 * workload was, and in that case we will fill in the thread_map when
+	 * we fork the workload in perf_evlist__prepare_workload.
+	 */
+	if (trace->filter_pids.nr > 0)
+		err = perf_evlist__set_filter_pids(evlist, trace->filter_pids.nr, trace->filter_pids.entries);
+	else if (thread_map__pid(evlist->threads, 0) == -1)
+		err = trace__set_filter_loop_pids(trace);
+
+	if (err < 0)
+		goto out_error_mem;
+
+	if (trace->ev_qualifier_ids.nr > 0) {
+		err = trace__set_ev_qualifier_filter(trace);
+		if (err < 0)
+			goto out_errno;
+
+		pr_debug("event qualifier tracepoint filter: %s\n",
+			 trace->syscalls.events.sys_exit->filter);
+	}
+
+	err = perf_evlist__apply_filters(evlist, &evsel);
+	if (err < 0)
+		goto out_error_apply_filters;
+
+	err = perf_evlist__mmap(evlist, trace->opts.mmap_pages);
+	if (err < 0)
+		goto out_error_mmap;
+
+	if (!target__none(&trace->opts.target) && !trace->opts.initial_delay)
+		perf_evlist__enable(evlist);
+
+	if (forks)
+		perf_evlist__start_workload(evlist);
+
+	if (trace->opts.initial_delay) {
+		usleep(trace->opts.initial_delay * 1000);
+		perf_evlist__enable(evlist);
+	}
+
+	trace->multiple_threads = thread_map__pid(evlist->threads, 0) == -1 ||
+				  evlist->threads->nr > 1 ||
+				  perf_evlist__first(evlist)->attr.inherit;
+
+	/*
+	 * Now that we already used evsel->attr to ask the kernel to setup the
+	 * events, lets reuse evsel->attr.sample_max_stack as the limit in
+	 * trace__resolve_callchain(), allowing per-event max-stack settings
+	 * to override an explicitely set --max-stack global setting.
+	 */
+	evlist__for_each_entry(evlist, evsel) {
+		if (evsel__has_callchain(evsel) &&
+		    evsel->attr.sample_max_stack == 0)
+			evsel->attr.sample_max_stack = trace->max_stack;
+	}
+again:
+	before = trace->nr_events;
+
+	for (i = 0; i < evlist->nr_mmaps; i++) {
+		union perf_event *event;
+		struct perf_mmap *md;
+
+		md = &evlist->mmap[i];
+		if (perf_mmap__read_init(md) < 0)
+			continue;
+
+		while ((event = perf_mmap__read_event(md)) != NULL) {
+			struct perf_sample sample;
+
+			++trace->nr_events;
+
+			err = perf_evlist__parse_sample(evlist, event, &sample);
+			if (err) {
+				fprintf(trace->output, "Can't parse sample, err = %d, skipping...\n", err);
+				goto next_event;
+			}
+
+			trace__handle_event(trace, event, &sample);
+next_event:
+			perf_mmap__consume(md);
+
+			if (interrupted)
+				goto out_disable;
+
+			if (done && !draining) {
+				perf_evlist__disable(evlist);
+				draining = true;
+			}
+		}
+		perf_mmap__read_done(md);
+	}
+
+	if (trace->nr_events == before) {
+		int timeout = done ? 100 : -1;
+
+		if (!draining && perf_evlist__poll(evlist, timeout) > 0) {
+			if (perf_evlist__filter_pollfd(evlist, POLLERR | POLLHUP) == 0)
+				draining = true;
+
+			goto again;
+		}
+	} else {
+		goto again;
+	}
+
+out_disable:
+	thread__zput(trace->current);
+
+	perf_evlist__disable(evlist);
+
+	if (!err) {
+		if (trace->summary)
+			trace__fprintf_thread_summary(trace, trace->output);
+
+		if (trace->show_tool_stats) {
+			fprintf(trace->output, "Stats:\n "
+					       " vfs_getname : %" PRIu64 "\n"
+					       " proc_getname: %" PRIu64 "\n",
+				trace->stats.vfs_getname,
+				trace->stats.proc_getname);
+		}
+	}
+
+out_delete_evlist:
+	trace__symbols__exit(trace);
+
+	perf_evlist__delete(evlist);
+	cgroup__put(trace->cgroup);
+	trace->evlist = NULL;
+	trace->live = false;
+	return err;
+{
+	char errbuf[BUFSIZ];
+
+out_error_sched_stat_runtime:
+	tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "sched", "sched_stat_runtime");
+	goto out_error;
+
+out_error_raw_syscalls:
+	tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "raw_syscalls", "sys_(enter|exit)");
+	goto out_error;
+
+out_error_mmap:
+	perf_evlist__strerror_mmap(evlist, errno, errbuf, sizeof(errbuf));
+	goto out_error;
+
+out_error_open:
+	perf_evlist__strerror_open(evlist, errno, errbuf, sizeof(errbuf));
+
+out_error:
+	fprintf(trace->output, "%s\n", errbuf);
+	goto out_delete_evlist;
+
+out_error_apply_filters:
+	fprintf(trace->output,
+		"Failed to set filter \"%s\" on event %s with %d (%s)\n",
+		evsel->filter, perf_evsel__name(evsel), errno,
+		str_error_r(errno, errbuf, sizeof(errbuf)));
+	goto out_delete_evlist;
+}
+out_error_mem:
+	fprintf(trace->output, "Not enough memory to run!\n");
+	goto out_delete_evlist;
+
+out_errno:
+	fprintf(trace->output, "errno=%d,%s\n", errno, strerror(errno));
+	goto out_delete_evlist;
+}
+
+static int trace__replay(struct trace *trace)
+{
+	const struct perf_evsel_str_handler handlers[] = {
+		{ "probe:vfs_getname",	     trace__vfs_getname, },
+	};
+	struct perf_data data = {
+		.file      = {
+			.path = input_name,
+		},
+		.mode      = PERF_DATA_MODE_READ,
+		.force     = trace->force,
+	};
+	struct perf_session *session;
+	struct perf_evsel *evsel;
+	int err = -1;
+
+	trace->tool.sample	  = trace__process_sample;
+	trace->tool.mmap	  = perf_event__process_mmap;
+	trace->tool.mmap2	  = perf_event__process_mmap2;
+	trace->tool.comm	  = perf_event__process_comm;
+	trace->tool.exit	  = perf_event__process_exit;
+	trace->tool.fork	  = perf_event__process_fork;
+	trace->tool.attr	  = perf_event__process_attr;
+	trace->tool.tracing_data  = perf_event__process_tracing_data;
+	trace->tool.build_id	  = perf_event__process_build_id;
+	trace->tool.namespaces	  = perf_event__process_namespaces;
+
+	trace->tool.ordered_events = true;
+	trace->tool.ordering_requires_timestamps = true;
+
+	/* add tid to output */
+	trace->multiple_threads = true;
+
+	session = perf_session__new(&data, false, &trace->tool);
+	if (session == NULL)
+		return -1;
+
+	if (trace->opts.target.pid)
+		symbol_conf.pid_list_str = strdup(trace->opts.target.pid);
+
+	if (trace->opts.target.tid)
+		symbol_conf.tid_list_str = strdup(trace->opts.target.tid);
+
+	if (symbol__init(&session->header.env) < 0)
+		goto out;
+
+	trace->host = &session->machines.host;
+
+	err = perf_session__set_tracepoints_handlers(session, handlers);
+	if (err)
+		goto out;
+
+	evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
+						     "raw_syscalls:sys_enter");
+	/* older kernels have syscalls tp versus raw_syscalls */
+	if (evsel == NULL)
+		evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
+							     "syscalls:sys_enter");
+
+	if (evsel &&
+	    (perf_evsel__init_raw_syscall_tp(evsel, trace__sys_enter) < 0 ||
+	    perf_evsel__init_sc_tp_ptr_field(evsel, args))) {
+		pr_err("Error during initialize raw_syscalls:sys_enter event\n");
+		goto out;
+	}
+
+	evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
+						     "raw_syscalls:sys_exit");
+	if (evsel == NULL)
+		evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
+							     "syscalls:sys_exit");
+	if (evsel &&
+	    (perf_evsel__init_raw_syscall_tp(evsel, trace__sys_exit) < 0 ||
+	    perf_evsel__init_sc_tp_uint_field(evsel, ret))) {
+		pr_err("Error during initialize raw_syscalls:sys_exit event\n");
+		goto out;
+	}
+
+	evlist__for_each_entry(session->evlist, evsel) {
+		if (evsel->attr.type == PERF_TYPE_SOFTWARE &&
+		    (evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ||
+		     evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
+		     evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS))
+			evsel->handler = trace__pgfault;
+	}
+
+	setup_pager();
+
+	err = perf_session__process_events(session);
+	if (err)
+		pr_err("Failed to process events, error %d", err);
+
+	else if (trace->summary)
+		trace__fprintf_thread_summary(trace, trace->output);
+
+out:
+	perf_session__delete(session);
+
+	return err;
+}
+
+static size_t trace__fprintf_threads_header(FILE *fp)
+{
+	size_t printed;
+
+	printed  = fprintf(fp, "\n Summary of events:\n\n");
+
+	return printed;
+}
+
+DEFINE_RESORT_RB(syscall_stats, a->msecs > b->msecs,
+	struct stats 	*stats;
+	double		msecs;
+	int		syscall;
+)
+{
+	struct int_node *source = rb_entry(nd, struct int_node, rb_node);
+	struct stats *stats = source->priv;
+
+	entry->syscall = source->i;
+	entry->stats   = stats;
+	entry->msecs   = stats ? (u64)stats->n * (avg_stats(stats) / NSEC_PER_MSEC) : 0;
+}
+
+static size_t thread__dump_stats(struct thread_trace *ttrace,
+				 struct trace *trace, FILE *fp)
+{
+	size_t printed = 0;
+	struct syscall *sc;
+	struct rb_node *nd;
+	DECLARE_RESORT_RB_INTLIST(syscall_stats, ttrace->syscall_stats);
+
+	if (syscall_stats == NULL)
+		return 0;
+
+	printed += fprintf(fp, "\n");
+
+	printed += fprintf(fp, "   syscall            calls    total       min       avg       max      stddev\n");
+	printed += fprintf(fp, "                               (msec)    (msec)    (msec)    (msec)        (%%)\n");
+	printed += fprintf(fp, "   --------------- -------- --------- --------- --------- ---------     ------\n");
+
+	resort_rb__for_each_entry(nd, syscall_stats) {
+		struct stats *stats = syscall_stats_entry->stats;
+		if (stats) {
+			double min = (double)(stats->min) / NSEC_PER_MSEC;
+			double max = (double)(stats->max) / NSEC_PER_MSEC;
+			double avg = avg_stats(stats);
+			double pct;
+			u64 n = (u64) stats->n;
+
+			pct = avg ? 100.0 * stddev_stats(stats)/avg : 0.0;
+			avg /= NSEC_PER_MSEC;
+
+			sc = &trace->syscalls.table[syscall_stats_entry->syscall];
+			printed += fprintf(fp, "   %-15s", sc->name);
+			printed += fprintf(fp, " %8" PRIu64 " %9.3f %9.3f %9.3f",
+					   n, syscall_stats_entry->msecs, min, avg);
+			printed += fprintf(fp, " %9.3f %9.2f%%\n", max, pct);
+		}
+	}
+
+	resort_rb__delete(syscall_stats);
+	printed += fprintf(fp, "\n\n");
+
+	return printed;
+}
+
+static size_t trace__fprintf_thread(FILE *fp, struct thread *thread, struct trace *trace)
+{
+	size_t printed = 0;
+	struct thread_trace *ttrace = thread__priv(thread);
+	double ratio;
+
+	if (ttrace == NULL)
+		return 0;
+
+	ratio = (double)ttrace->nr_events / trace->nr_events * 100.0;
+
+	printed += fprintf(fp, " %s (%d), ", thread__comm_str(thread), thread->tid);
+	printed += fprintf(fp, "%lu events, ", ttrace->nr_events);
+	printed += fprintf(fp, "%.1f%%", ratio);
+	if (ttrace->pfmaj)
+		printed += fprintf(fp, ", %lu majfaults", ttrace->pfmaj);
+	if (ttrace->pfmin)
+		printed += fprintf(fp, ", %lu minfaults", ttrace->pfmin);
+	if (trace->sched)
+		printed += fprintf(fp, ", %.3f msec\n", ttrace->runtime_ms);
+	else if (fputc('\n', fp) != EOF)
+		++printed;
+
+	printed += thread__dump_stats(ttrace, trace, fp);
+
+	return printed;
+}
+
+static unsigned long thread__nr_events(struct thread_trace *ttrace)
+{
+	return ttrace ? ttrace->nr_events : 0;
+}
+
+DEFINE_RESORT_RB(threads, (thread__nr_events(a->thread->priv) < thread__nr_events(b->thread->priv)),
+	struct thread *thread;
+)
+{
+	entry->thread = rb_entry(nd, struct thread, rb_node);
+}
+
+static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp)
+{
+	size_t printed = trace__fprintf_threads_header(fp);
+	struct rb_node *nd;
+	int i;
+
+	for (i = 0; i < THREADS__TABLE_SIZE; i++) {
+		DECLARE_RESORT_RB_MACHINE_THREADS(threads, trace->host, i);
+
+		if (threads == NULL) {
+			fprintf(fp, "%s", "Error sorting output by nr_events!\n");
+			return 0;
+		}
+
+		resort_rb__for_each_entry(nd, threads)
+			printed += trace__fprintf_thread(fp, threads_entry->thread, trace);
+
+		resort_rb__delete(threads);
+	}
+	return printed;
+}
+
+static int trace__set_duration(const struct option *opt, const char *str,
+			       int unset __maybe_unused)
+{
+	struct trace *trace = opt->value;
+
+	trace->duration_filter = atof(str);
+	return 0;
+}
+
+static int trace__set_filter_pids(const struct option *opt, const char *str,
+				  int unset __maybe_unused)
+{
+	int ret = -1;
+	size_t i;
+	struct trace *trace = opt->value;
+	/*
+	 * FIXME: introduce a intarray class, plain parse csv and create a
+	 * { int nr, int entries[] } struct...
+	 */
+	struct intlist *list = intlist__new(str);
+
+	if (list == NULL)
+		return -1;
+
+	i = trace->filter_pids.nr = intlist__nr_entries(list) + 1;
+	trace->filter_pids.entries = calloc(i, sizeof(pid_t));
+
+	if (trace->filter_pids.entries == NULL)
+		goto out;
+
+	trace->filter_pids.entries[0] = getpid();
+
+	for (i = 1; i < trace->filter_pids.nr; ++i)
+		trace->filter_pids.entries[i] = intlist__entry(list, i - 1)->i;
+
+	intlist__delete(list);
+	ret = 0;
+out:
+	return ret;
+}
+
+static int trace__open_output(struct trace *trace, const char *filename)
+{
+	struct stat st;
+
+	if (!stat(filename, &st) && st.st_size) {
+		char oldname[PATH_MAX];
+
+		scnprintf(oldname, sizeof(oldname), "%s.old", filename);
+		unlink(oldname);
+		rename(filename, oldname);
+	}
+
+	trace->output = fopen(filename, "w");
+
+	return trace->output == NULL ? -errno : 0;
+}
+
+static int parse_pagefaults(const struct option *opt, const char *str,
+			    int unset __maybe_unused)
+{
+	int *trace_pgfaults = opt->value;
+
+	if (strcmp(str, "all") == 0)
+		*trace_pgfaults |= TRACE_PFMAJ | TRACE_PFMIN;
+	else if (strcmp(str, "maj") == 0)
+		*trace_pgfaults |= TRACE_PFMAJ;
+	else if (strcmp(str, "min") == 0)
+		*trace_pgfaults |= TRACE_PFMIN;
+	else
+		return -1;
+
+	return 0;
+}
+
+static void evlist__set_evsel_handler(struct perf_evlist *evlist, void *handler)
+{
+	struct perf_evsel *evsel;
+
+	evlist__for_each_entry(evlist, evsel)
+		evsel->handler = handler;
+}
+
+static int evlist__set_syscall_tp_fields(struct perf_evlist *evlist)
+{
+	struct perf_evsel *evsel;
+
+	evlist__for_each_entry(evlist, evsel) {
+		if (evsel->priv || !evsel->tp_format)
+			continue;
+
+		if (strcmp(evsel->tp_format->system, "syscalls"))
+			continue;
+
+		if (perf_evsel__init_syscall_tp(evsel))
+			return -1;
+
+		if (!strncmp(evsel->tp_format->name, "sys_enter_", 10)) {
+			struct syscall_tp *sc = evsel->priv;
+
+			if (__tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64)))
+				return -1;
+		} else if (!strncmp(evsel->tp_format->name, "sys_exit_", 9)) {
+			struct syscall_tp *sc = evsel->priv;
+
+			if (__tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap))
+				return -1;
+		}
+	}
+
+	return 0;
+}
+
+/*
+ * XXX: Hackish, just splitting the combined -e+--event (syscalls
+ * (raw_syscalls:{sys_{enter,exit}} + events (tracepoints, HW, SW, etc) to use
+ * existing facilities unchanged (trace->ev_qualifier + parse_options()).
+ *
+ * It'd be better to introduce a parse_options() variant that would return a
+ * list with the terms it didn't match to an event...
+ */
+static int trace__parse_events_option(const struct option *opt, const char *str,
+				      int unset __maybe_unused)
+{
+	struct trace *trace = (struct trace *)opt->value;
+	const char *s = str;
+	char *sep = NULL, *lists[2] = { NULL, NULL, };
+	int len = strlen(str) + 1, err = -1, list, idx;
+	char *strace_groups_dir = system_path(STRACE_GROUPS_DIR);
+	char group_name[PATH_MAX];
+
+	if (strace_groups_dir == NULL)
+		return -1;
+
+	if (*s == '!') {
+		++s;
+		trace->not_ev_qualifier = true;
+	}
+
+	while (1) {
+		if ((sep = strchr(s, ',')) != NULL)
+			*sep = '\0';
+
+		list = 0;
+		if (syscalltbl__id(trace->sctbl, s) >= 0 ||
+		    syscalltbl__strglobmatch_first(trace->sctbl, s, &idx) >= 0) {
+			list = 1;
+		} else {
+			path__join(group_name, sizeof(group_name), strace_groups_dir, s);
+			if (access(group_name, R_OK) == 0)
+				list = 1;
+		}
+
+		if (lists[list]) {
+			sprintf(lists[list] + strlen(lists[list]), ",%s", s);
+		} else {
+			lists[list] = malloc(len);
+			if (lists[list] == NULL)
+				goto out;
+			strcpy(lists[list], s);
+		}
+
+		if (!sep)
+			break;
+
+		*sep = ',';
+		s = sep + 1;
+	}
+
+	if (lists[1] != NULL) {
+		struct strlist_config slist_config = {
+			.dirname = strace_groups_dir,
+		};
+
+		trace->ev_qualifier = strlist__new(lists[1], &slist_config);
+		if (trace->ev_qualifier == NULL) {
+			fputs("Not enough memory to parse event qualifier", trace->output);
+			goto out;
+		}
+
+		if (trace__validate_ev_qualifier(trace))
+			goto out;
+		trace->trace_syscalls = true;
+	}
+
+	err = 0;
+
+	if (lists[0]) {
+		struct option o = OPT_CALLBACK('e', "event", &trace->evlist, "event",
+					       "event selector. use 'perf list' to list available events",
+					       parse_events_option);
+		err = parse_events_option(&o, lists[0], 0);
+	}
+out:
+	if (sep)
+		*sep = ',';
+
+	return err;
+}
+
+static int trace__parse_cgroups(const struct option *opt, const char *str, int unset)
+{
+	struct trace *trace = opt->value;
+
+	if (!list_empty(&trace->evlist->entries))
+		return parse_cgroups(opt, str, unset);
+
+	trace->cgroup = evlist__findnew_cgroup(trace->evlist, str);
+
+	return 0;
+}
+
+int cmd_trace(int argc, const char **argv)
+{
+	const char *trace_usage[] = {
+		"perf trace [<options>] [<command>]",
+		"perf trace [<options>] -- <command> [<options>]",
+		"perf trace record [<options>] [<command>]",
+		"perf trace record [<options>] -- <command> [<options>]",
+		NULL
+	};
+	struct trace trace = {
+		.syscalls = {
+			. max = -1,
+		},
+		.opts = {
+			.target = {
+				.uid	   = UINT_MAX,
+				.uses_mmap = true,
+			},
+			.user_freq     = UINT_MAX,
+			.user_interval = ULLONG_MAX,
+			.no_buffering  = true,
+			.mmap_pages    = UINT_MAX,
+			.proc_map_timeout  = 500,
+		},
+		.output = stderr,
+		.show_comm = true,
+		.trace_syscalls = false,
+		.kernel_syscallchains = false,
+		.max_stack = UINT_MAX,
+	};
+	const char *output_name = NULL;
+	const struct option trace_options[] = {
+	OPT_CALLBACK('e', "event", &trace, "event",
+		     "event/syscall selector. use 'perf list' to list available events",
+		     trace__parse_events_option),
+	OPT_BOOLEAN(0, "comm", &trace.show_comm,
+		    "show the thread COMM next to its id"),
+	OPT_BOOLEAN(0, "tool_stats", &trace.show_tool_stats, "show tool stats"),
+	OPT_CALLBACK(0, "expr", &trace, "expr", "list of syscalls/events to trace",
+		     trace__parse_events_option),
+	OPT_STRING('o', "output", &output_name, "file", "output file name"),
+	OPT_STRING('i', "input", &input_name, "file", "Analyze events in file"),
+	OPT_STRING('p', "pid", &trace.opts.target.pid, "pid",
+		    "trace events on existing process id"),
+	OPT_STRING('t', "tid", &trace.opts.target.tid, "tid",
+		    "trace events on existing thread id"),
+	OPT_CALLBACK(0, "filter-pids", &trace, "CSV list of pids",
+		     "pids to filter (by the kernel)", trace__set_filter_pids),
+	OPT_BOOLEAN('a', "all-cpus", &trace.opts.target.system_wide,
+		    "system-wide collection from all CPUs"),
+	OPT_STRING('C', "cpu", &trace.opts.target.cpu_list, "cpu",
+		    "list of cpus to monitor"),
+	OPT_BOOLEAN(0, "no-inherit", &trace.opts.no_inherit,
+		    "child tasks do not inherit counters"),
+	OPT_CALLBACK('m', "mmap-pages", &trace.opts.mmap_pages, "pages",
+		     "number of mmap data pages",
+		     perf_evlist__parse_mmap_pages),
+	OPT_STRING('u', "uid", &trace.opts.target.uid_str, "user",
+		   "user to profile"),
+	OPT_CALLBACK(0, "duration", &trace, "float",
+		     "show only events with duration > N.M ms",
+		     trace__set_duration),
+	OPT_BOOLEAN(0, "sched", &trace.sched, "show blocking scheduler events"),
+	OPT_INCR('v', "verbose", &verbose, "be more verbose"),
+	OPT_BOOLEAN('T', "time", &trace.full_time,
+		    "Show full timestamp, not time relative to first start"),
+	OPT_BOOLEAN(0, "failure", &trace.failure_only,
+		    "Show only syscalls that failed"),
+	OPT_BOOLEAN('s', "summary", &trace.summary_only,
+		    "Show only syscall summary with statistics"),
+	OPT_BOOLEAN('S', "with-summary", &trace.summary,
+		    "Show all syscalls and summary with statistics"),
+	OPT_CALLBACK_DEFAULT('F', "pf", &trace.trace_pgfaults, "all|maj|min",
+		     "Trace pagefaults", parse_pagefaults, "maj"),
+	OPT_BOOLEAN(0, "syscalls", &trace.trace_syscalls, "Trace syscalls"),
+	OPT_BOOLEAN('f', "force", &trace.force, "don't complain, do it"),
+	OPT_CALLBACK(0, "call-graph", &trace.opts,
+		     "record_mode[,record_size]", record_callchain_help,
+		     &record_parse_callchain_opt),
+	OPT_BOOLEAN(0, "kernel-syscall-graph", &trace.kernel_syscallchains,
+		    "Show the kernel callchains on the syscall exit path"),
+	OPT_UINTEGER(0, "min-stack", &trace.min_stack,
+		     "Set the minimum stack depth when parsing the callchain, "
+		     "anything below the specified depth will be ignored."),
+	OPT_UINTEGER(0, "max-stack", &trace.max_stack,
+		     "Set the maximum stack depth when parsing the callchain, "
+		     "anything beyond the specified depth will be ignored. "
+		     "Default: kernel.perf_event_max_stack or " __stringify(PERF_MAX_STACK_DEPTH)),
+	OPT_BOOLEAN(0, "print-sample", &trace.print_sample,
+			"print the PERF_RECORD_SAMPLE PERF_SAMPLE_ info, for debugging"),
+	OPT_UINTEGER(0, "proc-map-timeout", &trace.opts.proc_map_timeout,
+			"per thread proc mmap processing timeout in ms"),
+	OPT_CALLBACK('G', "cgroup", &trace, "name", "monitor event in cgroup name only",
+		     trace__parse_cgroups),
+	OPT_UINTEGER('D', "delay", &trace.opts.initial_delay,
+		     "ms to wait before starting measurement after program "
+		     "start"),
+	OPT_END()
+	};
+	bool __maybe_unused max_stack_user_set = true;
+	bool mmap_pages_user_set = true;
+	struct perf_evsel *evsel;
+	const char * const trace_subcommands[] = { "record", NULL };
+	int err = -1;
+	char bf[BUFSIZ];
+
+	signal(SIGSEGV, sighandler_dump_stack);
+	signal(SIGFPE, sighandler_dump_stack);
+
+	trace.evlist = perf_evlist__new();
+	trace.sctbl = syscalltbl__new();
+
+	if (trace.evlist == NULL || trace.sctbl == NULL) {
+		pr_err("Not enough memory to run!\n");
+		err = -ENOMEM;
+		goto out;
+	}
+
+	argc = parse_options_subcommand(argc, argv, trace_options, trace_subcommands,
+				 trace_usage, PARSE_OPT_STOP_AT_NON_OPTION);
+
+	if ((nr_cgroups || trace.cgroup) && !trace.opts.target.system_wide) {
+		usage_with_options_msg(trace_usage, trace_options,
+				       "cgroup monitoring only available in system-wide mode");
+	}
+
+	evsel = bpf__setup_output_event(trace.evlist, "__augmented_syscalls__");
+	if (IS_ERR(evsel)) {
+		bpf__strerror_setup_output_event(trace.evlist, PTR_ERR(evsel), bf, sizeof(bf));
+		pr_err("ERROR: Setup trace syscalls enter failed: %s\n", bf);
+		goto out;
+	}
+
+	if (evsel) {
+		if (perf_evsel__init_augmented_syscall_tp(evsel) ||
+		    perf_evsel__init_augmented_syscall_tp_args(evsel))
+			goto out;
+		trace.syscalls.events.augmented = evsel;
+	}
+
+	err = bpf__setup_stdout(trace.evlist);
+	if (err) {
+		bpf__strerror_setup_stdout(trace.evlist, err, bf, sizeof(bf));
+		pr_err("ERROR: Setup BPF stdout failed: %s\n", bf);
+		goto out;
+	}
+
+	err = -1;
+
+	if (trace.trace_pgfaults) {
+		trace.opts.sample_address = true;
+		trace.opts.sample_time = true;
+	}
+
+	if (trace.opts.mmap_pages == UINT_MAX)
+		mmap_pages_user_set = false;
+
+	if (trace.max_stack == UINT_MAX) {
+		trace.max_stack = input_name ? PERF_MAX_STACK_DEPTH : sysctl__max_stack();
+		max_stack_user_set = false;
+	}
+
+#ifdef HAVE_DWARF_UNWIND_SUPPORT
+	if ((trace.min_stack || max_stack_user_set) && !callchain_param.enabled) {
+		record_opts__parse_callchain(&trace.opts, &callchain_param, "dwarf", false);
+	}
+#endif
+
+	if (callchain_param.enabled) {
+		if (!mmap_pages_user_set && geteuid() == 0)
+			trace.opts.mmap_pages = perf_event_mlock_kb_in_pages() * 4;
+
+		symbol_conf.use_callchain = true;
+	}
+
+	if (trace.evlist->nr_entries > 0) {
+		evlist__set_evsel_handler(trace.evlist, trace__event_handler);
+		if (evlist__set_syscall_tp_fields(trace.evlist)) {
+			perror("failed to set syscalls:* tracepoint fields");
+			goto out;
+		}
+	}
+
+	if ((argc >= 1) && (strcmp(argv[0], "record") == 0))
+		return trace__record(&trace, argc-1, &argv[1]);
+
+	/* summary_only implies summary option, but don't overwrite summary if set */
+	if (trace.summary_only)
+		trace.summary = trace.summary_only;
+
+	if (!trace.trace_syscalls && !trace.trace_pgfaults &&
+	    trace.evlist->nr_entries == 0 /* Was --events used? */) {
+		trace.trace_syscalls = true;
+	}
+
+	if (output_name != NULL) {
+		err = trace__open_output(&trace, output_name);
+		if (err < 0) {
+			perror("failed to create output file");
+			goto out;
+		}
+	}
+
+	err = target__validate(&trace.opts.target);
+	if (err) {
+		target__strerror(&trace.opts.target, err, bf, sizeof(bf));
+		fprintf(trace.output, "%s", bf);
+		goto out_close;
+	}
+
+	err = target__parse_uid(&trace.opts.target);
+	if (err) {
+		target__strerror(&trace.opts.target, err, bf, sizeof(bf));
+		fprintf(trace.output, "%s", bf);
+		goto out_close;
+	}
+
+	if (!argc && target__none(&trace.opts.target))
+		trace.opts.target.system_wide = true;
+
+	if (input_name)
+		err = trace__replay(&trace);
+	else
+		err = trace__run(&trace, argc, argv);
+
+out_close:
+	if (output_name != NULL)
+		fclose(trace.output);
+out:
+	return err;
+}