diff --git a/sdk/cc_sdk_test.go b/sdk/cc_sdk_test.go
index 8c9e228..a76b07d 100644
--- a/sdk/cc_sdk_test.go
+++ b/sdk/cc_sdk_test.go
@@ -435,8 +435,10 @@
 	)
 }
 
-// Verify that when the shared library has some common and some arch specific properties that the generated
-// snapshot is optimized properly.
+// Verify that when the shared library has some common and some arch specific
+// properties that the generated snapshot is optimized properly. Substruct
+// handling is tested with the sanitize clauses (but note there's a lot of
+// built-in logic in sanitize.go that can affect those flags).
 func TestSnapshotWithCcSharedLibraryCommonProperties(t *testing.T) {
 	result := testSdkWithCc(t, `
 		sdk {
@@ -451,9 +453,18 @@
 				"aidl/foo/bar/Test.aidl",
 			],
 			export_include_dirs: ["include"],
+			sanitize: {
+				fuzzer: false,
+				integer_overflow: true,
+				diag: { undefined: false },
+			},
 			arch: {
 				arm64: {
 					export_system_include_dirs: ["arm64/include"],
+					sanitize: {
+						hwaddress: true,
+						integer_overflow: false,
+					},
 				},
 			},
 			stl: "none",
@@ -471,13 +482,26 @@
     stl: "none",
     compile_multilib: "both",
     export_include_dirs: ["include/include"],
+    sanitize: {
+        fuzzer: false,
+        diag: {
+            undefined: false,
+        },
+    },
     arch: {
         arm64: {
             srcs: ["arm64/lib/mynativelib.so"],
             export_system_include_dirs: ["arm64/include/arm64/include"],
+            sanitize: {
+                hwaddress: true,
+                integer_overflow: false,
+            },
         },
         arm: {
             srcs: ["arm/lib/mynativelib.so"],
+            sanitize: {
+                integer_overflow: true,
+            },
         },
     },
 }
@@ -488,13 +512,26 @@
     stl: "none",
     compile_multilib: "both",
     export_include_dirs: ["include/include"],
+    sanitize: {
+        fuzzer: false,
+        diag: {
+            undefined: false,
+        },
+    },
     arch: {
         arm64: {
             srcs: ["arm64/lib/mynativelib.so"],
             export_system_include_dirs: ["arm64/include/arm64/include"],
+            sanitize: {
+                hwaddress: true,
+                integer_overflow: false,
+            },
         },
         arm: {
             srcs: ["arm/lib/mynativelib.so"],
+            sanitize: {
+                integer_overflow: true,
+            },
         },
     },
 }
@@ -506,7 +543,7 @@
 `),
 		checkAllCopyRules(`
 include/Test.h -> include/include/Test.h
-.intermediates/mynativelib/android_arm64_armv8-a_shared/mynativelib.so -> arm64/lib/mynativelib.so
+.intermediates/mynativelib/android_arm64_armv8-a_shared_hwasan/mynativelib.so -> arm64/lib/mynativelib.so
 arm64/include/Arm64Test.h -> arm64/include/arm64/include/Arm64Test.h
 .intermediates/mynativelib/android_arm_armv7-a-neon_shared/mynativelib.so -> arm/lib/mynativelib.so`),
 	)
diff --git a/sdk/update.go b/sdk/update.go
index 537ab13..65baa5e 100644
--- a/sdk/update.go
+++ b/sdk/update.go
@@ -1348,7 +1348,8 @@
 
 // A property that can be optimized by the commonValueExtractor.
 type extractorProperty struct {
-	// The name of the field for this property.
+	// The name of the field for this property. It is a "."-separated path for
+	// fields in non-anonymous substructs.
 	name string
 
 	// Filter that can use metadata associated with the properties being optimized
@@ -1385,18 +1386,18 @@
 func newCommonValueExtractor(propertiesStruct interface{}) *commonValueExtractor {
 	structType := getStructValue(reflect.ValueOf(propertiesStruct)).Type()
 	extractor := &commonValueExtractor{}
-	extractor.gatherFields(structType, nil)
+	extractor.gatherFields(structType, nil, "")
 	return extractor
 }
 
 // Gather the fields from the supplied structure type from which common values will
 // be extracted.
 //
-// This is recursive function. If it encounters an embedded field (no field name)
-// that is a struct then it will recurse into that struct passing in the accessor
-// for the field. That will then be used in the accessors for the fields in the
-// embedded struct.
-func (e *commonValueExtractor) gatherFields(structType reflect.Type, containingStructAccessor fieldAccessorFunc) {
+// This is recursive function. If it encounters a struct then it will recurse
+// into it, passing in the accessor for the field and the struct name as prefix
+// for the nested fields. That will then be used in the accessors for the fields
+// in the embedded struct.
+func (e *commonValueExtractor) gatherFields(structType reflect.Type, containingStructAccessor fieldAccessorFunc, namePrefix string) {
 	for f := 0; f < structType.NumField(); f++ {
 		field := structType.Field(f)
 		if field.PkgPath != "" {
@@ -1426,7 +1427,7 @@
 		// Save a copy of the field index for use in the function.
 		fieldIndex := f
 
-		name := field.Name
+		name := namePrefix + field.Name
 
 		fieldGetter := func(value reflect.Value) reflect.Value {
 			if containingStructAccessor != nil {
@@ -1448,9 +1449,15 @@
 			return value.Field(fieldIndex)
 		}
 
-		if field.Type.Kind() == reflect.Struct && field.Anonymous {
-			// Gather fields from the embedded structure.
-			e.gatherFields(field.Type, fieldGetter)
+		if field.Type.Kind() == reflect.Struct {
+			// Gather fields from the nested or embedded structure.
+			var subNamePrefix string
+			if field.Anonymous {
+				subNamePrefix = namePrefix
+			} else {
+				subNamePrefix = name + "."
+			}
+			e.gatherFields(field.Type, fieldGetter, subNamePrefix)
 		} else {
 			property := extractorProperty{
 				name,
@@ -1514,7 +1521,8 @@
 // Iterates over each exported field (capitalized name) and checks to see whether they
 // have the same value (using DeepEquals) across all the input properties. If it does not then no
 // change is made. Otherwise, the common value is stored in the field in the commonProperties
-// and the field in each of the input properties structure is set to its default value.
+// and the field in each of the input properties structure is set to its default value. Nested
+// structs are visited recursively and their non-struct fields are compared.
 func (e *commonValueExtractor) extractCommonProperties(commonProperties interface{}, inputPropertiesSlice interface{}) error {
 	commonPropertiesValue := reflect.ValueOf(commonProperties)
 	commonStructValue := commonPropertiesValue.Elem()