internal/asan: match runtime.asan{read,write} len parameter type

The len parameter runtime.asan{read,write} is of type uintptr. Match its
type in Read and Write.

For #64611

Change-Id: I0be278c38a357e600521ced87c0e23038a11e8a2
Reviewed-on: https://go-review.googlesource.com/c/go/+/572755
LUCI-TryBot-Result: Go LUCI <[email protected]>
Auto-Submit: Tobias Klauser <[email protected]>
Reviewed-by: Cherry Mui <[email protected]>
Reviewed-by: Ian Lance Taylor <[email protected]>

Author: tklauser

src/internal/asan/asan.go

@@ -13,7 +13,7 @@ import (
 const Enabled = true
 
 //go:linkname Read runtime.asanread
-func Read(addr unsafe.Pointer, len int)
+func Read(addr unsafe.Pointer, len uintptr)
 
 //go:linkname Write runtime.asanwrite
-func Write(addr unsafe.Pointer, len int)
+func Write(addr unsafe.Pointer, len uintptr)

src/internal/asan/noasan.go

@@ -12,8 +12,6 @@ import (
 
 const Enabled = false
 
-func Read(addr unsafe.Pointer, len int) {
-}
+func Read(addr unsafe.Pointer, len uintptr) {}
 
-func Write(addr unsafe.Pointer, len int) {
-}
+func Write(addr unsafe.Pointer, len uintptr) {}

src/syscall/syscall_unix.go

@@ -193,7 +193,7 @@ func Read(fd int, p []byte) (n int, err error) {
 		msan.Write(unsafe.Pointer(&p[0]), uintptr(n))
 	}
 	if asan.Enabled && n > 0 {
-		asan.Write(unsafe.Pointer(&p[0]), n)
+		asan.Write(unsafe.Pointer(&p[0]), uintptr(n))
 	}
 	return
 }
@@ -217,7 +217,7 @@ func Write(fd int, p []byte) (n int, err error) {
 		msan.Read(unsafe.Pointer(&p[0]), uintptr(n))
 	}
 	if asan.Enabled && n > 0 {
-		asan.Read(unsafe.Pointer(&p[0]), n)
+		asan.Read(unsafe.Pointer(&p[0]), uintptr(n))
 	}
 	return
 }
@@ -236,7 +236,7 @@ func Pread(fd int, p []byte, offset int64) (n int, err error) {
 		msan.Write(unsafe.Pointer(&p[0]), uintptr(n))
 	}
 	if asan.Enabled && n > 0 {
-		asan.Write(unsafe.Pointer(&p[0]), n)
+		asan.Write(unsafe.Pointer(&p[0]), uintptr(n))
 	}
 	return
 }
@@ -253,7 +253,7 @@ func Pwrite(fd int, p []byte, offset int64) (n int, err error) {
 		msan.Read(unsafe.Pointer(&p[0]), uintptr(n))
 	}
 	if asan.Enabled && n > 0 {
-		asan.Read(unsafe.Pointer(&p[0]), n)
+		asan.Read(unsafe.Pointer(&p[0]), uintptr(n))
 	}
 	return
 }

src/syscall/syscall_windows.go

@@ -452,7 +452,7 @@ func ReadFile(fd Handle, p []byte, done *uint32, overlapped *Overlapped) error {
 		msan.Write(unsafe.Pointer(&p[0]), uintptr(*done))
 	}
 	if asan.Enabled && *done > 0 {
-		asan.Write(unsafe.Pointer(&p[0]), int(*done))
+		asan.Write(unsafe.Pointer(&p[0]), uintptr(*done))
 	}
 	return err
 }
@@ -469,7 +469,7 @@ func WriteFile(fd Handle, p []byte, done *uint32, overlapped *Overlapped) error
 		msan.Read(unsafe.Pointer(&p[0]), uintptr(*done))
 	}
 	if asan.Enabled && *done > 0 {
-		asan.Read(unsafe.Pointer(&p[0]), int(*done))
+		asan.Read(unsafe.Pointer(&p[0]), uintptr(*done))
 	}
 	return err
 }