Merge pull request #5694 from kevinGC:align32

PiperOrigin-RevId: 373271579

5 files changed, 14 insertions, 10 deletions

diff --git a/pkg/tcpip/BUILD b/pkg/tcpip/BUILD
index e96ba50ae..ea46c30da 100644
--- a/pkg/tcpip/BUILD
+++ b/pkg/tcpip/BUILD
@@ -29,6 +29,7 @@ go_library(
     ],
     visibility = ["//visibility:public"],
     deps = [
+        "//pkg/atomicbitops",
         "//pkg/sync",
         "//pkg/tcpip/buffer",
         "//pkg/waiter",
diff --git a/pkg/tcpip/socketops.go b/pkg/tcpip/socketops.go
index a6c877158..b26936b7f 100644
--- a/pkg/tcpip/socketops.go
+++ b/pkg/tcpip/socketops.go
@@ -18,6 +18,7 @@ import (
 	"math"
 	"sync/atomic"
 
+	"gvisor.dev/gvisor/pkg/atomicbitops"
 	"gvisor.dev/gvisor/pkg/sync"
 )
 
@@ -213,7 +214,7 @@ type SocketOptions struct {
 	getSendBufferLimits GetSendBufferLimits `state:"manual"`
 
 	// sendBufferSize determines the send buffer size for this socket.
-	sendBufferSize int64
+	sendBufferSize atomicbitops.AlignedAtomicInt64
 
 	// getReceiveBufferLimits provides the handler to get the min, default and
 	// max size for receive buffer. It is initialized at the creation time and
@@ -612,7 +613,7 @@ func (so *SocketOptions) SetBindToDevice(bindToDevice int32) Error {
 
 // GetSendBufferSize gets value for SO_SNDBUF option.
 func (so *SocketOptions) GetSendBufferSize() int64 {
-	return atomic.LoadInt64(&so.sendBufferSize)
+	return so.sendBufferSize.Load()
 }
 
 // SetSendBufferSize sets value for SO_SNDBUF option. notify indicates if the
@@ -621,7 +622,7 @@ func (so *SocketOptions) SetSendBufferSize(sendBufferSize int64, notify bool) {
 	v := sendBufferSize
 
 	if !notify {
-		atomic.StoreInt64(&so.sendBufferSize, v)
+		so.sendBufferSize.Store(v)
 		return
 	}
 
@@ -647,7 +648,7 @@ func (so *SocketOptions) SetSendBufferSize(sendBufferSize int64, notify bool) {
 
 	// Notify endpoint about change in buffer size.
 	newSz := so.handler.OnSetSendBufferSize(v)
-	atomic.StoreInt64(&so.sendBufferSize, newSz)
+	so.sendBufferSize.Store(newSz)
 }
 
 // GetReceiveBufferSize gets value for SO_RCVBUF option.
diff --git a/pkg/tcpip/stack/BUILD b/pkg/tcpip/stack/BUILD
index 2bd6a67f5..63ab31083 100644
--- a/pkg/tcpip/stack/BUILD
+++ b/pkg/tcpip/stack/BUILD
@@ -73,6 +73,7 @@ go_library(
     ],
     visibility = ["//visibility:public"],
     deps = [
+        "//pkg/atomicbitops",
         "//pkg/ilist",
         "//pkg/log",
         "//pkg/rand",
diff --git a/pkg/tcpip/stack/stack.go b/pkg/tcpip/stack/stack.go
index 436392f23..3d9e1e286 100644
--- a/pkg/tcpip/stack/stack.go
+++ b/pkg/tcpip/stack/stack.go
@@ -29,6 +29,7 @@ import (
 	"time"
 
 	"golang.org/x/time/rate"
+	"gvisor.dev/gvisor/pkg/atomicbitops"
 	"gvisor.dev/gvisor/pkg/rand"
 	"gvisor.dev/gvisor/pkg/sync"
 	"gvisor.dev/gvisor/pkg/tcpip"
@@ -65,10 +66,10 @@ type ResumableEndpoint interface {
 }
 
 // uniqueIDGenerator is a default unique ID generator.
-type uniqueIDGenerator uint64
+type uniqueIDGenerator atomicbitops.AlignedAtomicUint64
 
 func (u *uniqueIDGenerator) UniqueID() uint64 {
-	return atomic.AddUint64((*uint64)(u), 1)
+	return ((*atomicbitops.AlignedAtomicUint64)(u)).Add(1)
 }
 
 // Stack is a networking stack, with all supported protocols, NICs, and route
diff --git a/pkg/tcpip/tcpip.go b/pkg/tcpip/tcpip.go
index 6d7e22afe..f9acd4bb8 100644
--- a/pkg/tcpip/tcpip.go
+++ b/pkg/tcpip/tcpip.go
@@ -37,9 +37,9 @@ import (
 	"reflect"
 	"strconv"
 	"strings"
-	"sync/atomic"
 	"time"
 
+	"gvisor.dev/gvisor/pkg/atomicbitops"
 	"gvisor.dev/gvisor/pkg/sync"
 	"gvisor.dev/gvisor/pkg/waiter"
 )
@@ -1220,7 +1220,7 @@ type NetworkProtocolNumber uint32
 
 // A StatCounter keeps track of a statistic.
 type StatCounter struct {
-	count uint64
+	count atomicbitops.AlignedAtomicUint64
 }
 
 // Increment adds one to the counter.
@@ -1235,12 +1235,12 @@ func (s *StatCounter) Decrement() {
 
 // Value returns the current value of the counter.
 func (s *StatCounter) Value(name ...string) uint64 {
-	return atomic.LoadUint64(&s.count)
+	return s.count.Load()
 }
 
 // IncrementBy increments the counter by v.
 func (s *StatCounter) IncrementBy(v uint64) {
-	atomic.AddUint64(&s.count, v)
+	s.count.Add(v)
 }
 
 func (s *StatCounter) String() string {