cmd: update golang.org/x/sys dependency

$ go get -u golang.org/x/sys
$ go mod vendor
$ go mod tidy

Change-Id: Ie0a4646aef41b00ec8e27bc6f7e3ec9c270c8ccb
Reviewed-on: https://go-review.googlesource.com/c/go/+/174946
Run-TryBot: Filippo Valsorda <filippo@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

26 files changed, 296 insertions, 299 deletions

diff --git a/src/cmd/go.mod b/src/cmd/go.mod
index f131fa006c..52b66da9d0 100644
--- a/src/cmd/go.mod
+++ b/src/cmd/go.mod
@@ -7,6 +7,6 @@ require (
 	github.com/ianlancetaylor/demangle v0.0.0-20180524225900-fc6590592b44 // indirect
 	golang.org/x/arch v0.0.0-20181203225421-5a4828bb7045
 	golang.org/x/crypto v0.0.0-20190325154230-a5d413f7728c
-	golang.org/x/sys v0.0.0-20190424175732-18eb32c0e2f0 // indirect
+	golang.org/x/sys v0.0.0-20190502175342-a43fa875dd82 // indirect
 	golang.org/x/tools v0.0.0-20190325223049-1d95b17f1b04
 )
diff --git a/src/cmd/go.sum b/src/cmd/go.sum
index e796ae0321..75a8628478 100644
--- a/src/cmd/go.sum
+++ b/src/cmd/go.sum
@@ -9,10 +9,8 @@ golang.org/x/crypto v0.0.0-20190325154230-a5d413f7728c h1:Vj5n4GlwjmQteupaxJ9+0F
 golang.org/x/crypto v0.0.0-20190325154230-a5d413f7728c/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/sys v0.0.0-20190322080309-f49334f85ddc h1:4gbWbmmPFp4ySWICouJl6emP0MyS31yy9SrTlAGFT+g=
-golang.org/x/sys v0.0.0-20190322080309-f49334f85ddc/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20190424175732-18eb32c0e2f0 h1:V+O002es++Mnym06Rj/S6Fl7VCsgRBgVDGb/NoZVHUg=
-golang.org/x/sys v0.0.0-20190424175732-18eb32c0e2f0/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20190502175342-a43fa875dd82 h1:vsphBvatvfbhlb4PO1BYSr9dzugGxJ/SQHoNufZJq1w=
+golang.org/x/sys v0.0.0-20190502175342-a43fa875dd82/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/tools v0.0.0-20190325223049-1d95b17f1b04 h1:SRYGE+BqJRgY8JH4p2NmwTPeuREKqKYw5IuEmthTHKQ=
 golang.org/x/tools v0.0.0-20190325223049-1d95b17f1b04/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
diff --git a/src/cmd/vendor/golang.org/x/sys/unix/mkall.sh b/src/cmd/vendor/golang.org/x/sys/unix/mkall.sh
index 8be2f49a95..80d00707bb 100644
--- a/src/cmd/vendor/golang.org/x/sys/unix/mkall.sh
+++ b/src/cmd/vendor/golang.org/x/sys/unix/mkall.sh
@@ -146,24 +146,30 @@ netbsd_arm)
 	# API consistent across platforms.
 	mktypes="GOARCH=$GOARCH go tool cgo -godefs -- -fsigned-char"
 	;;
+netbsd_arm64)
+	mkerrors="$mkerrors -m64"
+	mksyscall="go run mksyscall.go -netbsd"
+	mksysnum="go run mksysnum.go 'http://cvsweb.netbsd.org/bsdweb.cgi/~checkout~/src/sys/kern/syscalls.master'"
+	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
+	;;
 openbsd_386)
 	mkerrors="$mkerrors -m32"
 	mksyscall="go run mksyscall.go -l32 -openbsd"
-	mksysctl="./mksysctl_openbsd.pl"
+	mksysctl="go run mksysctl_openbsd.go"
 	mksysnum="go run mksysnum.go 'https://cvsweb.openbsd.org/cgi-bin/cvsweb/~checkout~/src/sys/kern/syscalls.master'"
 	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
 	;;
 openbsd_amd64)
 	mkerrors="$mkerrors -m64"
 	mksyscall="go run mksyscall.go -openbsd"
-	mksysctl="./mksysctl_openbsd.pl"
+	mksysctl="go run mksysctl_openbsd.go"
 	mksysnum="go run mksysnum.go 'https://cvsweb.openbsd.org/cgi-bin/cvsweb/~checkout~/src/sys/kern/syscalls.master'"
 	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
 	;;
 openbsd_arm)
 	mkerrors="$mkerrors"
 	mksyscall="go run mksyscall.go -l32 -openbsd -arm"
-	mksysctl="./mksysctl_openbsd.pl"
+	mksysctl="go run mksysctl_openbsd.go"
 	mksysnum="go run mksysnum.go 'https://cvsweb.openbsd.org/cgi-bin/cvsweb/~checkout~/src/sys/kern/syscalls.master'"
 	# Let the type of C char be signed for making the bare syscall
 	# API consistent across platforms.
@@ -172,7 +178,7 @@ openbsd_arm)
 openbsd_arm64)
 	mkerrors="$mkerrors -m64"
 	mksyscall="go run mksyscall.go -openbsd"
-	mksysctl="./mksysctl_openbsd.pl"
+	mksysctl="go run mksysctl_openbsd.go"
 	mksysnum="go run mksysnum.go 'https://cvsweb.openbsd.org/cgi-bin/cvsweb/~checkout~/src/sys/kern/syscalls.master'"
 	# Let the type of C char be signed for making the bare syscall
 	# API consistent across platforms.
diff --git a/src/cmd/vendor/golang.org/x/sys/unix/mksysctl_openbsd.pl b/src/cmd/vendor/golang.org/x/sys/unix/mksysctl_openbsd.pl
deleted file mode 100644
index 20632e1460..0000000000
--- a/src/cmd/vendor/golang.org/x/sys/unix/mksysctl_openbsd.pl
+++ /dev/null
@@ -1,265 +0,0 @@
-#!/usr/bin/env perl
-
-# Copyright 2011 The Go Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style
-# license that can be found in the LICENSE file.
-
-#
-# Parse the header files for OpenBSD and generate a Go usable sysctl MIB.
-#
-# Build a MIB with each entry being an array containing the level, type and
-# a hash that will contain additional entries if the current entry is a node.
-# We then walk this MIB and create a flattened sysctl name to OID hash.
-#
-
-use strict;
-
-if($ENV{'GOARCH'} eq "" || $ENV{'GOOS'} eq "") {
-	print STDERR "GOARCH or GOOS not defined in environment\n";
-	exit 1;
-}
-
-my $debug = 0;
-my %ctls = ();
-
-my @headers = qw (
-	sys/sysctl.h
-	sys/socket.h
-	sys/tty.h
-	sys/malloc.h
-	sys/mount.h
-	sys/namei.h
-	sys/sem.h
-	sys/shm.h
-	sys/vmmeter.h
-	uvm/uvmexp.h
-	uvm/uvm_param.h
-	uvm/uvm_swap_encrypt.h
-	ddb/db_var.h
-	net/if.h
-	net/if_pfsync.h
-	net/pipex.h
-	netinet/in.h
-	netinet/icmp_var.h
-	netinet/igmp_var.h
-	netinet/ip_ah.h
-	netinet/ip_carp.h
-	netinet/ip_divert.h
-	netinet/ip_esp.h
-	netinet/ip_ether.h
-	netinet/ip_gre.h
-	netinet/ip_ipcomp.h
-	netinet/ip_ipip.h
-	netinet/pim_var.h
-	netinet/tcp_var.h
-	netinet/udp_var.h
-	netinet6/in6.h
-	netinet6/ip6_divert.h
-	netinet6/pim6_var.h
-	netinet/icmp6.h
-	netmpls/mpls.h
-);
-
-my @ctls = qw (
-	kern
-	vm
-	fs
-	net
-	#debug				# Special handling required
-	hw
-	#machdep			# Arch specific
-	user
-	ddb
-	#vfs				# Special handling required
-	fs.posix
-	kern.forkstat
-	kern.intrcnt
-	kern.malloc
-	kern.nchstats
-	kern.seminfo
-	kern.shminfo
-	kern.timecounter
-	kern.tty
-	kern.watchdog
-	net.bpf
-	net.ifq
-	net.inet
-	net.inet.ah
-	net.inet.carp
-	net.inet.divert
-	net.inet.esp
-	net.inet.etherip
-	net.inet.gre
-	net.inet.icmp
-	net.inet.igmp
-	net.inet.ip
-	net.inet.ip.ifq
-	net.inet.ipcomp
-	net.inet.ipip
-	net.inet.mobileip
-	net.inet.pfsync
-	net.inet.pim
-	net.inet.tcp
-	net.inet.udp
-	net.inet6
-	net.inet6.divert
-	net.inet6.ip6
-	net.inet6.icmp6
-	net.inet6.pim6
-	net.inet6.tcp6
-	net.inet6.udp6
-	net.mpls
-	net.mpls.ifq
-	net.key
-	net.pflow
-	net.pfsync
-	net.pipex
-	net.rt
-	vm.swapencrypt
-	#vfsgenctl			# Special handling required
-);
-
-# Node name "fixups"
-my %ctl_map = (
-	"ipproto" => "net.inet",
-	"net.inet.ipproto" => "net.inet",
-	"net.inet6.ipv6proto" => "net.inet6",
-	"net.inet6.ipv6" => "net.inet6.ip6",
-	"net.inet.icmpv6" => "net.inet6.icmp6",
-	"net.inet6.divert6" => "net.inet6.divert",
-	"net.inet6.tcp6" => "net.inet.tcp",
-	"net.inet6.udp6" => "net.inet.udp",
-	"mpls" => "net.mpls",
-	"swpenc" => "vm.swapencrypt"
-);
-
-# Node mappings
-my %node_map = (
-	"net.inet.ip.ifq" => "net.ifq",
-	"net.inet.pfsync" => "net.pfsync",
-	"net.mpls.ifq" => "net.ifq"
-);
-
-my $ctlname;
-my %mib = ();
-my %sysctl = ();
-my $node;
-
-sub debug() {
-	print STDERR "$_[0]\n" if $debug;
-}
-
-# Walk the MIB and build a sysctl name to OID mapping.
-sub build_sysctl() {
-	my ($node, $name, $oid) = @_;
-	my %node = %{$node};
-	my @oid = @{$oid};
-
-	foreach my $key (sort keys %node) {
-		my @node = @{$node{$key}};
-		my $nodename = $name.($name ne '' ? '.' : '').$key;
-		my @nodeoid = (@oid, $node[0]);
-		if ($node[1] eq 'CTLTYPE_NODE') {
-			if (exists $node_map{$nodename}) {
-				$node = \%mib;
-				$ctlname = $node_map{$nodename};
-				foreach my $part (split /\./, $ctlname) {
-					$node = \%{@{$$node{$part}}[2]};
-				}
-			} else {
-				$node = $node[2];
-			}
-			&build_sysctl($node, $nodename, \@nodeoid);
-		} elsif ($node[1] ne '') {
-			$sysctl{$nodename} = \@nodeoid;
-		}
-	}
-}
-
-foreach my $ctl (@ctls) {
-	$ctls{$ctl} = $ctl;
-}
-
-# Build MIB
-foreach my $header (@headers) {
-	&debug("Processing $header...");
-	open HEADER, "/usr/include/$header" ||
-	    print STDERR "Failed to open $header\n";
-	while (<HEADER>) {
-		if ($_ =~ /^#define\s+(CTL_NAMES)\s+{/ ||
-		    $_ =~ /^#define\s+(CTL_(.*)_NAMES)\s+{/ ||
-		    $_ =~ /^#define\s+((.*)CTL_NAMES)\s+{/) {
-			if ($1 eq 'CTL_NAMES') {
-				# Top level.
-				$node = \%mib;
-			} else {
-				# Node.
-				my $nodename = lc($2);
-				if ($header =~ /^netinet\//) {
-					$ctlname = "net.inet.$nodename";
-				} elsif ($header =~ /^netinet6\//) {
-					$ctlname = "net.inet6.$nodename";
-				} elsif ($header =~ /^net\//) {
-					$ctlname = "net.$nodename";
-				} else {
-					$ctlname = "$nodename";
-					$ctlname =~ s/^(fs|net|kern)_/$1\./;
-				}
-				if (exists $ctl_map{$ctlname}) {
-					$ctlname = $ctl_map{$ctlname};
-				}
-				if (not exists $ctls{$ctlname}) {
-					&debug("Ignoring $ctlname...");
-					next;
-				}
-
-				# Walk down from the top of the MIB.
-				$node = \%mib;
-				foreach my $part (split /\./, $ctlname) {
-					if (not exists $$node{$part}) {
-						&debug("Missing node $part");
-						$$node{$part} = [ 0, '', {} ];
-					}
-					$node = \%{@{$$node{$part}}[2]};
-				}
-			}
-
-			# Populate current node with entries.
-			my $i = -1;
-			while (defined($_) && $_ !~ /^}/) {
-				$_ = <HEADER>;
-				$i++ if $_ =~ /{.*}/;
-				next if $_ !~ /{\s+"(\w+)",\s+(CTLTYPE_[A-Z]+)\s+}/;
-				$$node{$1} = [ $i, $2, {} ];
-			}
-		}
-	}
-	close HEADER;
-}
-
-&build_sysctl(\%mib, "", []);
-
-print <<EOF;
-// mksysctl_openbsd.pl
-// Code generated by the command above; DO NOT EDIT.
-
-// +build $ENV{'GOARCH'},$ENV{'GOOS'}
-
-package unix;
-
-type mibentry struct {
-	ctlname string
-	ctloid []_C_int
-}
-
-var sysctlMib = []mibentry {
-EOF
-
-foreach my $name (sort keys %sysctl) {
-	my @oid = @{$sysctl{$name}};
-	print "\t{ \"$name\", []_C_int{ ", join(', ', @oid), " } }, \n";
-}
-
-print <<EOF;
-}
-EOF
diff --git a/src/cmd/vendor/golang.org/x/sys/unix/sockcmsg_unix.go b/src/cmd/vendor/golang.org/x/sys/unix/sockcmsg_unix.go
index a79565a7ff..062bcabab1 100644
--- a/src/cmd/vendor/golang.org/x/sys/unix/sockcmsg_unix.go
+++ b/src/cmd/vendor/golang.org/x/sys/unix/sockcmsg_unix.go
@@ -22,9 +22,9 @@ func cmsgAlignOf(salen int) int {
 		// There is no alignment on AIX.
 		salign = 1
 	case "darwin", "dragonfly", "solaris", "illumos":
-		// NOTE: It seems like 64-bit Darwin, DragonFly BSD, illumos,
-		// and Solaris kernels still require 32-bit aligned access to
-		// network subsystem.
+		// NOTE: It seems like 64-bit Darwin, DragonFly BSD,
+		// illumos, and Solaris kernels still require 32-bit
+		// aligned access to network subsystem.
 		if SizeofPtr == 8 {
 			salign = 4
 		}
diff --git a/src/cmd/vendor/golang.org/x/sys/unix/syscall.go b/src/cmd/vendor/golang.org/x/sys/unix/syscall.go
index 0d4b1d7a20..fd4ee8ebeb 100644
--- a/src/cmd/vendor/golang.org/x/sys/unix/syscall.go
+++ b/src/cmd/vendor/golang.org/x/sys/unix/syscall.go
@@ -50,5 +50,4 @@ func BytePtrFromString(s string) (*byte, error) {
 }
 
 // Single-word zero for use when we need a valid pointer to 0 bytes.
-// See mkunix.pl.
 var _zero uintptr
diff --git a/src/cmd/vendor/golang.org/x/sys/unix/syscall_linux.go b/src/cmd/vendor/golang.org/x/sys/unix/syscall_linux.go
index 558f07b53f..c302f01b2e 100644
--- a/src/cmd/vendor/golang.org/x/sys/unix/syscall_linux.go
+++ b/src/cmd/vendor/golang.org/x/sys/unix/syscall_linux.go
@@ -1675,6 +1675,69 @@ type fileHandle struct {
 	Type  int32
 }
 
+// FileHandle represents the C struct file_handle used by
+// name_to_handle_at (see NameToHandleAt) and open_by_handle_at (see
+// OpenByHandleAt).
+type FileHandle struct {
+	*fileHandle
+}
+
+// NewFileHandle constructs a FileHandle.
+func NewFileHandle(handleType int32, handle []byte) FileHandle {
+	const hdrSize = unsafe.Sizeof(fileHandle{})
+	buf := make([]byte, hdrSize+uintptr(len(handle)))
+	copy(buf[hdrSize:], handle)
+	fh := (*fileHandle)(unsafe.Pointer(&buf[0]))
+	fh.Type = handleType
+	fh.Bytes = uint32(len(handle))
+	return FileHandle{fh}
+}
+
+func (fh *FileHandle) Size() int   { return int(fh.fileHandle.Bytes) }
+func (fh *FileHandle) Type() int32 { return fh.fileHandle.Type }
+func (fh *FileHandle) Bytes() []byte {
+	n := fh.Size()
+	if n == 0 {
+		return nil
+	}
+	return (*[1 << 30]byte)(unsafe.Pointer(uintptr(unsafe.Pointer(&fh.fileHandle.Type)) + 4))[:n:n]
+}
+
+// NameToHandleAt wraps the name_to_handle_at system call; it obtains
+// a handle for a path name.
+func NameToHandleAt(dirfd int, path string, flags int) (handle FileHandle, mountID int, err error) {
+	var mid _C_int
+	// Try first with a small buffer, assuming the handle will
+	// only be 32 bytes.
+	size := uint32(32 + unsafe.Sizeof(fileHandle{}))
+	didResize := false
+	for {
+		buf := make([]byte, size)
+		fh := (*fileHandle)(unsafe.Pointer(&buf[0]))
+		fh.Bytes = size - uint32(unsafe.Sizeof(fileHandle{}))
+		err = nameToHandleAt(dirfd, path, fh, &mid, flags)
+		if err == EOVERFLOW {
+			if didResize {
+				// We shouldn't need to resize more than once
+				return
+			}
+			didResize = true
+			size = fh.Bytes + uint32(unsafe.Sizeof(fileHandle{}))
+			continue
+		}
+		if err != nil {
+			return
+		}
+		return FileHandle{fh}, int(mid), nil
+	}
+}
+
+// OpenByHandleAt wraps the open_by_handle_at system call; it opens a
+// file via a handle as previously returned by NameToHandleAt.
+func OpenByHandleAt(mountFD int, handle FileHandle, flags int) (fd int, err error) {
+	return openByHandleAt(mountFD, handle.fileHandle, flags)
+}
+
 /*
  * Unimplemented
  */
diff --git a/src/cmd/vendor/golang.org/x/sys/unix/zsysctl_openbsd_386.go b/src/cmd/vendor/golang.org/x/sys/unix/zsysctl_openbsd_386.go
index b005031abe..37dcc74c2d 100644
--- a/src/cmd/vendor/golang.org/x/sys/unix/zsysctl_openbsd_386.go
+++ b/src/cmd/vendor/golang.org/x/sys/unix/zsysctl_openbsd_386.go
@@ -1,6 +1,8 @@
 // mksysctl_openbsd.pl
 // Code generated by the command above; DO NOT EDIT.
 
+// +build 386,openbsd
+
 package unix
 
 type mibentry struct {
diff --git a/src/cmd/vendor/golang.org/x/sys/unix/zsysctl_openbsd_amd64.go b/src/cmd/vendor/golang.org/x/sys/unix/zsysctl_openbsd_amd64.go
index d014451c9d..fe6caa6eb7 100644
--- a/src/cmd/vendor/golang.org/x/sys/unix/zsysctl_openbsd_amd64.go
+++ b/src/cmd/vendor/golang.org/x/sys/unix/zsysctl_openbsd_amd64.go
@@ -1,4 +1,4 @@
-// mksysctl_openbsd.pl
+// go run mksysctl_openbsd.go
 // Code generated by the command above; DO NOT EDIT.
 
 // +build amd64,openbsd
diff --git a/src/cmd/vendor/golang.org/x/sys/unix/zsysctl_openbsd_arm.go b/src/cmd/vendor/golang.org/x/sys/unix/zsysctl_openbsd_arm.go
index b005031abe..6eb8c0b086 100644
--- a/src/cmd/vendor/golang.org/x/sys/unix/zsysctl_openbsd_arm.go
+++ b/src/cmd/vendor/golang.org/x/sys/unix/zsysctl_openbsd_arm.go
@@ -1,6 +1,8 @@
-// mksysctl_openbsd.pl
+// go run mksysctl_openbsd.go
 // Code generated by the command above; DO NOT EDIT.
 
+// +build arm,openbsd
+
 package unix
 
 type mibentry struct {
diff --git a/src/cmd/vendor/golang.org/x/sys/unix/zsysctl_openbsd_arm64.go b/src/cmd/vendor/golang.org/x/sys/unix/zsysctl_openbsd_arm64.go
index bfd21b0799..ba4304fd23 100644
--- a/src/cmd/vendor/golang.org/x/sys/unix/zsysctl_openbsd_arm64.go
+++ b/src/cmd/vendor/golang.org/x/sys/unix/zsysctl_openbsd_arm64.go
@@ -1,4 +1,4 @@
-// mksysctl_openbsd.pl
+// go run mksysctl_openbsd.go
 // Code generated by the command above; DO NOT EDIT.
 
 // +build arm64,openbsd
diff --git a/src/cmd/vendor/golang.org/x/sys/unix/ztypes_linux_386.go b/src/cmd/vendor/golang.org/x/sys/unix/ztypes_linux_386.go
index e09fe879ba..06471afa36 100644
--- a/src/cmd/vendor/golang.org/x/sys/unix/ztypes_linux_386.go
+++ b/src/cmd/vendor/golang.org/x/sys/unix/ztypes_linux_386.go
@@ -1452,6 +1452,21 @@ type TpacketBlockDesc struct {
 	Hdr     [40]byte
 }
 
+type TpacketBDTS struct {
+	Sec  uint32
+	Usec uint32
+}
+
+type TpacketHdrV1 struct {
+	Block_status        uint32
+	Num_pkts            uint32
+	Offset_to_first_pkt uint32
+	Blk_len             uint32
+	Seq_num             uint64
+	Ts_first_pkt        TpacketBDTS
+	Ts_last_pkt         TpacketBDTS
+}
+
 type TpacketReq struct {
 	Block_size uint32
 	Block_nr   uint32
diff --git a/src/cmd/vendor/golang.org/x/sys/unix/ztypes_linux_amd64.go b/src/cmd/vendor/golang.org/x/sys/unix/ztypes_linux_amd64.go
index 45e693438d..6bba58ed25 100644
--- a/src/cmd/vendor/golang.org/x/sys/unix/ztypes_linux_amd64.go
+++ b/src/cmd/vendor/golang.org/x/sys/unix/ztypes_linux_amd64.go
@@ -1464,6 +1464,21 @@ type TpacketBlockDesc struct {
 	Hdr     [40]byte
 }
 
+type TpacketBDTS struct {
+	Sec  uint32
+	Usec uint32
+}
+
+type TpacketHdrV1 struct {
+	Block_status        uint32
+	Num_pkts            uint32
+	Offset_to_first_pkt uint32
+	Blk_len             uint32
+	Seq_num             uint64
+	Ts_first_pkt        TpacketBDTS
+	Ts_last_pkt         TpacketBDTS
+}
+
 type TpacketReq struct {
 	Block_size uint32
 	Block_nr   uint32
diff --git a/src/cmd/vendor/golang.org/x/sys/unix/ztypes_linux_arm.go b/src/cmd/vendor/golang.org/x/sys/unix/ztypes_linux_arm.go
index 093afab186..07aa92b29d 100644
--- a/src/cmd/vendor/golang.org/x/sys/unix/ztypes_linux_arm.go
+++ b/src/cmd/vendor/golang.org/x/sys/unix/ztypes_linux_arm.go
@@ -1442,6 +1442,21 @@ type TpacketBlockDesc struct {
 	Hdr     [40]byte
 }
 
+type TpacketBDTS struct {
+	Sec  uint32
+	Usec uint32
+}
+
+type TpacketHdrV1 struct {
+	Block_status        uint32
+	Num_pkts            uint32
+	Offset_to_first_pkt uint32
+	Blk_len             uint32
+	Seq_num             uint64
+	Ts_first_pkt        TpacketBDTS
+	Ts_last_pkt         TpacketBDTS
+}
+
 type TpacketReq struct {
 	Block_size uint32
 	Block_nr   uint32
diff --git a/src/cmd/vendor/golang.org/x/sys/unix/ztypes_linux_arm64.go b/src/cmd/vendor/golang.org/x/sys/unix/ztypes_linux_arm64.go
index 5402721a18..66dba9aab6 100644
--- a/src/cmd/vendor/golang.org/x/sys/unix/ztypes_linux_arm64.go
+++ b/src/cmd/vendor/golang.org/x/sys/unix/ztypes_linux_arm64.go
@@ -1443,6 +1443,21 @@ type TpacketBlockDesc struct {
 	Hdr     [40]byte
 }
 
+type TpacketBDTS struct {
+	Sec  uint32
+	Usec uint32
+}
+
+type TpacketHdrV1 struct {
+	Block_status        uint32
+	Num_pkts            uint32
+	Offset_to_first_pkt uint32
+	Blk_len             uint32
+	Seq_num             uint64
+	Ts_first_pkt        TpacketBDTS
+	Ts_last_pkt         TpacketBDTS
+}
+
 type TpacketReq struct {
 	Block_size uint32
 	Block_nr   uint32
diff --git a/src/cmd/vendor/golang.org/x/sys/unix/ztypes_linux_mips.go b/src/cmd/vendor/golang.org/x/sys/unix/ztypes_linux_mips.go
index 19c8351c6d..b11b77d3ba 100644
--- a/src/cmd/vendor/golang.org/x/sys/unix/ztypes_linux_mips.go
+++ b/src/cmd/vendor/golang.org/x/sys/unix/ztypes_linux_mips.go
@@ -1448,6 +1448,21 @@ type TpacketBlockDesc struct {
 	Hdr     [40]byte
 }
 
+type TpacketBDTS struct {
+	Sec  uint32
+	Usec uint32
+}
+
+type TpacketHdrV1 struct {
+	Block_status        uint32
+	Num_pkts            uint32
+	Offset_to_first_pkt uint32
+	Blk_len             uint32
+	Seq_num             uint64
+	Ts_first_pkt        TpacketBDTS
+	Ts_last_pkt         TpacketBDTS
+}
+
 type TpacketReq struct {
 	Block_size uint32
 	Block_nr   uint32
diff --git a/src/cmd/vendor/golang.org/x/sys/unix/ztypes_linux_mips64.go b/src/cmd/vendor/golang.org/x/sys/unix/ztypes_linux_mips64.go
index 1431b26557..ccfd9522eb 100644
--- a/src/cmd/vendor/golang.org/x/sys/unix/ztypes_linux_mips64.go
+++ b/src/cmd/vendor/golang.org/x/sys/unix/ztypes_linux_mips64.go
@@ -1445,6 +1445,21 @@ type TpacketBlockDesc struct {
 	Hdr     [40]byte
 }
 
+type TpacketBDTS struct {
+	Sec  uint32
+	Usec uint32
+}
+
+type TpacketHdrV1 struct {
+	Block_status        uint32
+	Num_pkts            uint32
+	Offset_to_first_pkt uint32
+	Blk_len             uint32
+	Seq_num             uint64
+	Ts_first_pkt        TpacketBDTS
+	Ts_last_pkt         TpacketBDTS
+}
+
 type TpacketReq struct {
 	Block_size uint32
 	Block_nr   uint32
diff --git a/src/cmd/vendor/golang.org/x/sys/unix/ztypes_linux_mips64le.go b/src/cmd/vendor/golang.org/x/sys/unix/ztypes_linux_mips64le.go
index 181e370066..95374fd9b5 100644
--- a/src/cmd/vendor/golang.org/x/sys/unix/ztypes_linux_mips64le.go
+++ b/src/cmd/vendor/golang.org/x/sys/unix/ztypes_linux_mips64le.go
@@ -1445,6 +1445,21 @@ type TpacketBlockDesc struct {
 	Hdr     [40]byte
 }
 
+type TpacketBDTS struct {
+	Sec  uint32
+	Usec uint32
+}
+
+type TpacketHdrV1 struct {
+	Block_status        uint32
+	Num_pkts            uint32
+	Offset_to_first_pkt uint32
+	Blk_len             uint32
+	Seq_num             uint64
+	Ts_first_pkt        TpacketBDTS
+	Ts_last_pkt         TpacketBDTS
+}
+
 type TpacketReq struct {
 	Block_size uint32
 	Block_nr   uint32
diff --git a/src/cmd/vendor/golang.org/x/sys/unix/ztypes_linux_mipsle.go b/src/cmd/vendor/golang.org/x/sys/unix/ztypes_linux_mipsle.go
index 8c037caddd..9d4953daf5 100644
--- a/src/cmd/vendor/golang.org/x/sys/unix/ztypes_linux_mipsle.go
+++ b/src/cmd/vendor/golang.org/x/sys/unix/ztypes_linux_mipsle.go
@@ -1448,6 +1448,21 @@ type TpacketBlockDesc struct {
 	Hdr     [40]byte
 }
 
+type TpacketBDTS struct {
+	Sec  uint32
+	Usec uint32
+}
+
+type TpacketHdrV1 struct {
+	Block_status        uint32
+	Num_pkts            uint32
+	Offset_to_first_pkt uint32
+	Blk_len             uint32
+	Seq_num             uint64
+	Ts_first_pkt        TpacketBDTS
+	Ts_last_pkt         TpacketBDTS
+}
+
 type TpacketReq struct {
 	Block_size uint32
 	Block_nr   uint32
diff --git a/src/cmd/vendor/golang.org/x/sys/unix/ztypes_linux_ppc64.go b/src/cmd/vendor/golang.org/x/sys/unix/ztypes_linux_ppc64.go
index 97a2f8da24..a436410d62 100644
--- a/src/cmd/vendor/golang.org/x/sys/unix/ztypes_linux_ppc64.go
+++ b/src/cmd/vendor/golang.org/x/sys/unix/ztypes_linux_ppc64.go
@@ -1453,6 +1453,21 @@ type TpacketBlockDesc struct {
 	Hdr     [40]byte
 }
 
+type TpacketBDTS struct {
+	Sec  uint32
+	Usec uint32
+}
+
+type TpacketHdrV1 struct {
+	Block_status        uint32
+	Num_pkts            uint32
+	Offset_to_first_pkt uint32
+	Blk_len             uint32
+	Seq_num             uint64
+	Ts_first_pkt        TpacketBDTS
+	Ts_last_pkt         TpacketBDTS
+}
+
 type TpacketReq struct {
 	Block_size uint32
 	Block_nr   uint32
diff --git a/src/cmd/vendor/golang.org/x/sys/unix/ztypes_linux_ppc64le.go b/src/cmd/vendor/golang.org/x/sys/unix/ztypes_linux_ppc64le.go
index 8c2cdd77d1..dbe32bb303 100644
--- a/src/cmd/vendor/golang.org/x/sys/unix/ztypes_linux_ppc64le.go
+++ b/src/cmd/vendor/golang.org/x/sys/unix/ztypes_linux_ppc64le.go
@@ -1453,6 +1453,21 @@ type TpacketBlockDesc struct {
 	Hdr     [40]byte
 }
 
+type TpacketBDTS struct {
+	Sec  uint32
+	Usec uint32
+}
+
+type TpacketHdrV1 struct {
+	Block_status        uint32
+	Num_pkts            uint32
+	Offset_to_first_pkt uint32
+	Blk_len             uint32
+	Seq_num             uint64
+	Ts_first_pkt        TpacketBDTS
+	Ts_last_pkt         TpacketBDTS
+}
+
 type TpacketReq struct {
 	Block_size uint32
 	Block_nr   uint32
diff --git a/src/cmd/vendor/golang.org/x/sys/unix/ztypes_linux_riscv64.go b/src/cmd/vendor/golang.org/x/sys/unix/ztypes_linux_riscv64.go
index cd3a2d0b34..774d5c3eb7 100644
--- a/src/cmd/vendor/golang.org/x/sys/unix/ztypes_linux_riscv64.go
+++ b/src/cmd/vendor/golang.org/x/sys/unix/ztypes_linux_riscv64.go
@@ -1470,6 +1470,21 @@ type TpacketBlockDesc struct {
 	Hdr     [40]byte
 }
 
+type TpacketBDTS struct {
+	Sec  uint32
+	Usec uint32
+}
+
+type TpacketHdrV1 struct {
+	Block_status        uint32
+	Num_pkts            uint32
+	Offset_to_first_pkt uint32
+	Blk_len             uint32
+	Seq_num             uint64
+	Ts_first_pkt        TpacketBDTS
+	Ts_last_pkt         TpacketBDTS
+}
+
 type TpacketReq struct {
 	Block_size uint32
 	Block_nr   uint32
diff --git a/src/cmd/vendor/golang.org/x/sys/unix/ztypes_linux_s390x.go b/src/cmd/vendor/golang.org/x/sys/unix/ztypes_linux_s390x.go
index 0d459c7f8d..3b7747ed96 100644
--- a/src/cmd/vendor/golang.org/x/sys/unix/ztypes_linux_s390x.go
+++ b/src/cmd/vendor/golang.org/x/sys/unix/ztypes_linux_s390x.go
@@ -1467,6 +1467,21 @@ type TpacketBlockDesc struct {
 	Hdr     [40]byte
 }
 
+type TpacketBDTS struct {
+	Sec  uint32
+	Usec uint32
+}
+
+type TpacketHdrV1 struct {
+	Block_status        uint32
+	Num_pkts            uint32
+	Offset_to_first_pkt uint32
+	Blk_len             uint32
+	Seq_num             uint64
+	Ts_first_pkt        TpacketBDTS
+	Ts_last_pkt         TpacketBDTS
+}
+
 type TpacketReq struct {
 	Block_size uint32
 	Block_nr   uint32
diff --git a/src/cmd/vendor/golang.org/x/sys/unix/ztypes_linux_sparc64.go b/src/cmd/vendor/golang.org/x/sys/unix/ztypes_linux_sparc64.go
index 71e3b40021..c606f4776b 100644
--- a/src/cmd/vendor/golang.org/x/sys/unix/ztypes_linux_sparc64.go
+++ b/src/cmd/vendor/golang.org/x/sys/unix/ztypes_linux_sparc64.go
@@ -1448,6 +1448,21 @@ type TpacketBlockDesc struct {
 	Hdr     [40]byte
 }
 
+type TpacketBDTS struct {
+	Sec  uint32
+	Usec uint32
+}
+
+type TpacketHdrV1 struct {
+	Block_status        uint32
+	Num_pkts            uint32
+	Offset_to_first_pkt uint32
+	Blk_len             uint32
+	Seq_num             uint64
+	Ts_first_pkt        TpacketBDTS
+	Ts_last_pkt         TpacketBDTS
+}
+
 type TpacketReq struct {
 	Block_size uint32
 	Block_nr   uint32
diff --git a/src/cmd/vendor/golang.org/x/sys/windows/syscall_windows.go b/src/cmd/vendor/golang.org/x/sys/windows/syscall_windows.go
index 4c9bc55b4e..f4d19644e1 100644
--- a/src/cmd/vendor/golang.org/x/sys/windows/syscall_windows.go
+++ b/src/cmd/vendor/golang.org/x/sys/windows/syscall_windows.go
@@ -561,9 +561,6 @@ func Fsync(fd Handle) (err error) {
 }
 
 func Chmod(path string, mode uint32) (err error) {
-	if mode == 0 {
-		return syscall.EINVAL
-	}
 	p, e := UTF16PtrFromString(path)
 	if e != nil {
 		return e
diff --git a/src/cmd/vendor/modules.txt b/src/cmd/vendor/modules.txt
index 3a4eca6395..5974e060dd 100644
--- a/src/cmd/vendor/modules.txt
+++ b/src/cmd/vendor/modules.txt
@@ -1,19 +1,19 @@
 # github.com/google/pprof v0.0.0-20181206194817-3ea8567a2e57
 github.com/google/pprof/driver
-github.com/google/pprof/profile
-github.com/google/pprof/internal/driver
-github.com/google/pprof/internal/plugin
 github.com/google/pprof/internal/binutils
+github.com/google/pprof/internal/driver
+github.com/google/pprof/internal/elfexec
 github.com/google/pprof/internal/graph
 github.com/google/pprof/internal/measurement
+github.com/google/pprof/internal/plugin
 github.com/google/pprof/internal/report
 github.com/google/pprof/internal/symbolizer
+github.com/google/pprof/internal/symbolz
 github.com/google/pprof/internal/transport
+github.com/google/pprof/profile
 github.com/google/pprof/third_party/d3
 github.com/google/pprof/third_party/d3flamegraph
 github.com/google/pprof/third_party/svgpan
-github.com/google/pprof/internal/elfexec
-github.com/google/pprof/internal/symbolz
 # github.com/ianlancetaylor/demangle v0.0.0-20180524225900-fc6590592b44
 github.com/ianlancetaylor/demangle
 # golang.org/x/arch v0.0.0-20181203225421-5a4828bb7045
@@ -23,12 +23,15 @@ golang.org/x/arch/ppc64/ppc64asm
 golang.org/x/arch/x86/x86asm
 # golang.org/x/crypto v0.0.0-20190325154230-a5d413f7728c
 golang.org/x/crypto/ed25519
-golang.org/x/crypto/ssh/terminal
 golang.org/x/crypto/ed25519/internal/edwards25519
-# golang.org/x/sys v0.0.0-20190424175732-18eb32c0e2f0
+golang.org/x/crypto/ssh/terminal
+# golang.org/x/sys v0.0.0-20190502175342-a43fa875dd82
 golang.org/x/sys/unix
 golang.org/x/sys/windows
 # golang.org/x/tools v0.0.0-20190325223049-1d95b17f1b04
+golang.org/x/tools/go/analysis
+golang.org/x/tools/go/analysis/internal/analysisflags
+golang.org/x/tools/go/analysis/internal/facts
 golang.org/x/tools/go/analysis/passes/asmdecl
 golang.org/x/tools/go/analysis/passes/assign
 golang.org/x/tools/go/analysis/passes/atomic
@@ -37,7 +40,10 @@ golang.org/x/tools/go/analysis/passes/buildtag
 golang.org/x/tools/go/analysis/passes/cgocall
 golang.org/x/tools/go/analysis/passes/composite
 golang.org/x/tools/go/analysis/passes/copylock
+golang.org/x/tools/go/analysis/passes/ctrlflow
 golang.org/x/tools/go/analysis/passes/httpresponse
+golang.org/x/tools/go/analysis/passes/inspect
+golang.org/x/tools/go/analysis/passes/internal/analysisutil
 golang.org/x/tools/go/analysis/passes/loopclosure
 golang.org/x/tools/go/analysis/passes/lostcancel
 golang.org/x/tools/go/analysis/passes/nilfunc
@@ -51,14 +57,8 @@ golang.org/x/tools/go/analysis/passes/unreachable
 golang.org/x/tools/go/analysis/passes/unsafeptr
 golang.org/x/tools/go/analysis/passes/unusedresult
 golang.org/x/tools/go/analysis/unitchecker
-golang.org/x/tools/go/analysis
-golang.org/x/tools/go/analysis/passes/internal/analysisutil
-golang.org/x/tools/go/analysis/passes/inspect
+golang.org/x/tools/go/ast/astutil
 golang.org/x/tools/go/ast/inspector
-golang.org/x/tools/go/analysis/passes/ctrlflow
 golang.org/x/tools/go/cfg
-golang.org/x/tools/go/types/typeutil
-golang.org/x/tools/go/analysis/internal/analysisflags
-golang.org/x/tools/go/analysis/internal/facts
-golang.org/x/tools/go/ast/astutil
 golang.org/x/tools/go/types/objectpath
+golang.org/x/tools/go/types/typeutil