diff --git a/cc/cc.go b/cc/cc.go
index 91c4417..2ee851b 100644
--- a/cc/cc.go
+++ b/cc/cc.go
@@ -1980,15 +1980,19 @@
 	}
 }
 
-func (c *Module) addSharedLibDependenciesWithVersions(ctx android.BottomUpMutatorContext,
-	variations []blueprint.Variation, depTag libraryDependencyTag, name, version string, far bool) {
+func AddSharedLibDependenciesWithVersions(ctx android.BottomUpMutatorContext, mod LinkableInterface,
+	variations []blueprint.Variation, depTag blueprint.DependencyTag, name, version string, far bool) {
 
 	variations = append([]blueprint.Variation(nil), variations...)
 
-	if version != "" && CanBeOrLinkAgainstVersionVariants(c) {
+	if version != "" && CanBeOrLinkAgainstVersionVariants(mod) {
 		// Version is explicitly specified. i.e. libFoo#30
 		variations = append(variations, blueprint.Variation{Mutator: "version", Variation: version})
-		depTag.explicitlyVersioned = true
+		if tag, ok := depTag.(libraryDependencyTag); ok {
+			tag.explicitlyVersioned = true
+		} else {
+			panic(fmt.Errorf("Unexpected dependency tag: %T", depTag))
+		}
 	}
 
 	if far {
@@ -1998,6 +2002,74 @@
 	}
 }
 
+func GetSnapshot(c LinkableInterface, snapshotInfo **SnapshotInfo, actx android.BottomUpMutatorContext) SnapshotInfo {
+	// Only modules with BOARD_VNDK_VERSION uses snapshot.  Others use the zero value of
+	// SnapshotInfo, which provides no mappings.
+	if *snapshotInfo == nil {
+		// Only retrieve the snapshot on demand in order to avoid circular dependencies
+		// between the modules in the snapshot and the snapshot itself.
+		var snapshotModule []blueprint.Module
+		if c.InVendor() && c.VndkVersion() == actx.DeviceConfig().VndkVersion() {
+			snapshotModule = actx.AddVariationDependencies(nil, nil, "vendor_snapshot")
+		} else if recoverySnapshotVersion := actx.DeviceConfig().RecoverySnapshotVersion(); recoverySnapshotVersion != "current" && recoverySnapshotVersion != "" && c.InRecovery() {
+			snapshotModule = actx.AddVariationDependencies(nil, nil, "recovery_snapshot")
+		}
+		if len(snapshotModule) > 0 {
+			snapshot := actx.OtherModuleProvider(snapshotModule[0], SnapshotInfoProvider).(SnapshotInfo)
+			*snapshotInfo = &snapshot
+			// republish the snapshot for use in later mutators on this module
+			actx.SetProvider(SnapshotInfoProvider, snapshot)
+		} else {
+			*snapshotInfo = &SnapshotInfo{}
+		}
+	}
+
+	return **snapshotInfo
+}
+
+func RewriteSnapshotLib(lib string, snapshotMap map[string]string) string {
+	if snapshot, ok := snapshotMap[lib]; ok {
+		return snapshot
+	}
+
+	return lib
+}
+
+// RewriteLibs takes a list of names of shared libraries and scans it for three types
+// of names:
+//
+// 1. Name of an NDK library that refers to a prebuilt module.
+//    For each of these, it adds the name of the prebuilt module (which will be in
+//    prebuilts/ndk) to the list of nonvariant libs.
+// 2. Name of an NDK library that refers to an ndk_library module.
+//    For each of these, it adds the name of the ndk_library module to the list of
+//    variant libs.
+// 3. Anything else (so anything that isn't an NDK library).
+//    It adds these to the nonvariantLibs list.
+//
+// The caller can then know to add the variantLibs dependencies differently from the
+// nonvariantLibs
+func RewriteLibs(c LinkableInterface, snapshotInfo **SnapshotInfo, actx android.BottomUpMutatorContext, config android.Config, list []string) (nonvariantLibs []string, variantLibs []string) {
+	variantLibs = []string{}
+
+	nonvariantLibs = []string{}
+	for _, entry := range list {
+		// strip #version suffix out
+		name, _ := StubsLibNameAndVersion(entry)
+		if c.InRecovery() {
+			nonvariantLibs = append(nonvariantLibs, RewriteSnapshotLib(entry, GetSnapshot(c, snapshotInfo, actx).SharedLibs))
+		} else if c.UseSdk() && inList(name, *getNDKKnownLibs(config)) {
+			variantLibs = append(variantLibs, name+ndkLibrarySuffix)
+		} else if c.UseVndk() {
+			nonvariantLibs = append(nonvariantLibs, RewriteSnapshotLib(entry, GetSnapshot(c, snapshotInfo, actx).SharedLibs))
+		} else {
+			// put name#version back
+			nonvariantLibs = append(nonvariantLibs, entry)
+		}
+	}
+	return nonvariantLibs, variantLibs
+}
+
 func (c *Module) DepsMutator(actx android.BottomUpMutatorContext) {
 	if !c.Enabled() {
 		return
@@ -2016,83 +2088,16 @@
 	c.Properties.AndroidMkSystemSharedLibs = deps.SystemSharedLibs
 
 	var snapshotInfo *SnapshotInfo
-	getSnapshot := func() SnapshotInfo {
-		// Only modules with BOARD_VNDK_VERSION uses snapshot.  Others use the zero value of
-		// SnapshotInfo, which provides no mappings.
-		if snapshotInfo == nil {
-			// Only retrieve the snapshot on demand in order to avoid circular dependencies
-			// between the modules in the snapshot and the snapshot itself.
-			var snapshotModule []blueprint.Module
-			if c.InVendor() && c.VndkVersion() == actx.DeviceConfig().VndkVersion() {
-				snapshotModule = ctx.AddVariationDependencies(nil, nil, "vendor_snapshot")
-			} else if recoverySnapshotVersion := actx.DeviceConfig().RecoverySnapshotVersion(); recoverySnapshotVersion != "current" && recoverySnapshotVersion != "" && c.InRecovery() {
-				snapshotModule = ctx.AddVariationDependencies(nil, nil, "recovery_snapshot")
-			}
-			if len(snapshotModule) > 0 {
-				snapshot := ctx.OtherModuleProvider(snapshotModule[0], SnapshotInfoProvider).(SnapshotInfo)
-				snapshotInfo = &snapshot
-				// republish the snapshot for use in later mutators on this module
-				ctx.SetProvider(SnapshotInfoProvider, snapshot)
-			} else {
-				snapshotInfo = &SnapshotInfo{}
-			}
-		}
-
-		return *snapshotInfo
-	}
-
-	rewriteSnapshotLib := func(lib string, snapshotMap map[string]string) string {
-		if snapshot, ok := snapshotMap[lib]; ok {
-			return snapshot
-		}
-
-		return lib
-	}
 
 	variantNdkLibs := []string{}
 	variantLateNdkLibs := []string{}
 	if ctx.Os() == android.Android {
-		// rewriteLibs takes a list of names of shared libraries and scans it for three types
-		// of names:
-		//
-		// 1. Name of an NDK library that refers to a prebuilt module.
-		//    For each of these, it adds the name of the prebuilt module (which will be in
-		//    prebuilts/ndk) to the list of nonvariant libs.
-		// 2. Name of an NDK library that refers to an ndk_library module.
-		//    For each of these, it adds the name of the ndk_library module to the list of
-		//    variant libs.
-		// 3. Anything else (so anything that isn't an NDK library).
-		//    It adds these to the nonvariantLibs list.
-		//
-		// The caller can then know to add the variantLibs dependencies differently from the
-		// nonvariantLibs
-
-		rewriteLibs := func(list []string) (nonvariantLibs []string, variantLibs []string) {
-			variantLibs = []string{}
-			nonvariantLibs = []string{}
-			for _, entry := range list {
-				// strip #version suffix out
-				name, _ := StubsLibNameAndVersion(entry)
-				if c.InRecovery() {
-					nonvariantLibs = append(nonvariantLibs, rewriteSnapshotLib(entry, getSnapshot().SharedLibs))
-				} else if ctx.useSdk() && inList(name, *getNDKKnownLibs(ctx.Config())) {
-					variantLibs = append(variantLibs, name+ndkLibrarySuffix)
-				} else if ctx.useVndk() {
-					nonvariantLibs = append(nonvariantLibs, rewriteSnapshotLib(entry, getSnapshot().SharedLibs))
-				} else {
-					// put name#version back
-					nonvariantLibs = append(nonvariantLibs, entry)
-				}
-			}
-			return nonvariantLibs, variantLibs
-		}
-
-		deps.SharedLibs, variantNdkLibs = rewriteLibs(deps.SharedLibs)
-		deps.LateSharedLibs, variantLateNdkLibs = rewriteLibs(deps.LateSharedLibs)
-		deps.ReexportSharedLibHeaders, _ = rewriteLibs(deps.ReexportSharedLibHeaders)
+		deps.SharedLibs, variantNdkLibs = RewriteLibs(c, &snapshotInfo, actx, ctx.Config(), deps.SharedLibs)
+		deps.LateSharedLibs, variantLateNdkLibs = RewriteLibs(c, &snapshotInfo, actx, ctx.Config(), deps.LateSharedLibs)
+		deps.ReexportSharedLibHeaders, _ = RewriteLibs(c, &snapshotInfo, actx, ctx.Config(), deps.ReexportSharedLibHeaders)
 
 		for idx, lib := range deps.RuntimeLibs {
-			deps.RuntimeLibs[idx] = rewriteSnapshotLib(lib, getSnapshot().SharedLibs)
+			deps.RuntimeLibs[idx] = RewriteSnapshotLib(lib, GetSnapshot(c, &snapshotInfo, actx).SharedLibs)
 		}
 	}
 
@@ -2102,7 +2107,7 @@
 			depTag.reexportFlags = true
 		}
 
-		lib = rewriteSnapshotLib(lib, getSnapshot().HeaderLibs)
+		lib = RewriteSnapshotLib(lib, GetSnapshot(c, &snapshotInfo, actx).HeaderLibs)
 
 		if c.IsStubs() {
 			actx.AddFarVariationDependencies(append(ctx.Target().Variations(), c.ImageVariation()),
@@ -2125,7 +2130,7 @@
 			lib = impl
 		}
 
-		lib = rewriteSnapshotLib(lib, getSnapshot().StaticLibs)
+		lib = RewriteSnapshotLib(lib, GetSnapshot(c, &snapshotInfo, actx).StaticLibs)
 
 		actx.AddVariationDependencies([]blueprint.Variation{
 			{Mutator: "link", Variation: "static"},
@@ -2145,7 +2150,7 @@
 			lib = impl
 		}
 
-		lib = rewriteSnapshotLib(lib, getSnapshot().StaticLibs)
+		lib = RewriteSnapshotLib(lib, GetSnapshot(c, &snapshotInfo, actx).StaticLibs)
 
 		actx.AddVariationDependencies([]blueprint.Variation{
 			{Mutator: "link", Variation: "static"},
@@ -2159,14 +2164,14 @@
 		depTag := libraryDependencyTag{Kind: staticLibraryDependency, staticUnwinder: true}
 		actx.AddVariationDependencies([]blueprint.Variation{
 			{Mutator: "link", Variation: "static"},
-		}, depTag, rewriteSnapshotLib(staticUnwinder(actx), getSnapshot().StaticLibs))
+		}, depTag, RewriteSnapshotLib(staticUnwinder(actx), GetSnapshot(c, &snapshotInfo, actx).StaticLibs))
 	}
 
 	for _, lib := range deps.LateStaticLibs {
 		depTag := libraryDependencyTag{Kind: staticLibraryDependency, Order: lateLibraryDependency}
 		actx.AddVariationDependencies([]blueprint.Variation{
 			{Mutator: "link", Variation: "static"},
-		}, depTag, rewriteSnapshotLib(lib, getSnapshot().StaticLibs))
+		}, depTag, RewriteSnapshotLib(lib, GetSnapshot(c, &snapshotInfo, actx).StaticLibs))
 	}
 
 	// shared lib names without the #version suffix
@@ -2191,7 +2196,7 @@
 		variations := []blueprint.Variation{
 			{Mutator: "link", Variation: "shared"},
 		}
-		c.addSharedLibDependenciesWithVersions(ctx, variations, depTag, name, version, false)
+		AddSharedLibDependenciesWithVersions(ctx, c, variations, depTag, name, version, false)
 	}
 
 	for _, lib := range deps.LateSharedLibs {
@@ -2205,7 +2210,7 @@
 		variations := []blueprint.Variation{
 			{Mutator: "link", Variation: "shared"},
 		}
-		c.addSharedLibDependenciesWithVersions(ctx, variations, depTag, lib, "", false)
+		AddSharedLibDependenciesWithVersions(ctx, c, variations, depTag, lib, "", false)
 	}
 
 	actx.AddVariationDependencies([]blueprint.Variation{
@@ -2230,11 +2235,11 @@
 	actx.AddVariationDependencies(crtVariations, objDepTag, deps.ObjFiles...)
 	if deps.CrtBegin != "" {
 		actx.AddVariationDependencies(crtVariations, CrtBeginDepTag,
-			rewriteSnapshotLib(deps.CrtBegin, getSnapshot().Objects))
+			RewriteSnapshotLib(deps.CrtBegin, GetSnapshot(c, &snapshotInfo, actx).Objects))
 	}
 	if deps.CrtEnd != "" {
 		actx.AddVariationDependencies(crtVariations, CrtEndDepTag,
-			rewriteSnapshotLib(deps.CrtEnd, getSnapshot().Objects))
+			RewriteSnapshotLib(deps.CrtEnd, GetSnapshot(c, &snapshotInfo, actx).Objects))
 	}
 	if deps.LinkerFlagsFile != "" {
 		actx.AddDependency(c, linkerFlagsDepTag, deps.LinkerFlagsFile)
@@ -2837,8 +2842,8 @@
 				// they merely serve as Make dependencies and do not affect this lib itself.
 				c.Properties.AndroidMkSharedLibs = append(
 					c.Properties.AndroidMkSharedLibs, makeLibName)
-				// Record baseLibName for snapshots.
-				c.Properties.SnapshotSharedLibs = append(c.Properties.SnapshotSharedLibs, baseLibName(depName))
+				// Record BaseLibName for snapshots.
+				c.Properties.SnapshotSharedLibs = append(c.Properties.SnapshotSharedLibs, BaseLibName(depName))
 			case libDepTag.static():
 				if libDepTag.wholeStatic {
 					c.Properties.AndroidMkWholeStaticLibs = append(
@@ -2855,8 +2860,8 @@
 			case runtimeDepTag:
 				c.Properties.AndroidMkRuntimeLibs = append(
 					c.Properties.AndroidMkRuntimeLibs, MakeLibName(ctx, c, ccDep, depName)+libDepTag.makeSuffix)
-				// Record baseLibName for snapshots.
-				c.Properties.SnapshotRuntimeLibs = append(c.Properties.SnapshotRuntimeLibs, baseLibName(depName))
+				// Record BaseLibName for snapshots.
+				c.Properties.SnapshotRuntimeLibs = append(c.Properties.SnapshotRuntimeLibs, BaseLibName(depName))
 			case objDepTag:
 				depPaths.Objs.objFiles = append(depPaths.Objs.objFiles, linkFile.Path())
 			case CrtBeginDepTag:
@@ -2924,8 +2929,8 @@
 	return orderedStaticPaths, transitiveStaticLibs
 }
 
-// baseLibName trims known prefixes and suffixes
-func baseLibName(depName string) string {
+// BaseLibName trims known prefixes and suffixes
+func BaseLibName(depName string) string {
 	libName := strings.TrimSuffix(depName, llndkLibrarySuffix)
 	libName = strings.TrimSuffix(libName, vendorPublicLibrarySuffix)
 	libName = android.RemoveOptionalPrebuiltPrefix(libName)
@@ -2933,7 +2938,7 @@
 }
 
 func MakeLibName(ctx android.ModuleContext, c LinkableInterface, ccDep LinkableInterface, depName string) string {
-	libName := baseLibName(depName)
+	libName := BaseLibName(depName)
 	ccDepModule, _ := ccDep.(*Module)
 	isLLndk := ccDepModule != nil && ccDepModule.IsLlndk()
 	nonSystemVariantsExist := ccDep.HasNonSystemVariants() || isLLndk
diff --git a/cc/cc_test.go b/cc/cc_test.go
index 7fc044d..e0fae5a 100644
--- a/cc/cc_test.go
+++ b/cc/cc_test.go
@@ -396,50 +396,6 @@
 	}
 }
 
-func checkSnapshotIncludeExclude(t *testing.T, ctx *android.TestContext, singleton android.TestingSingleton, moduleName, snapshotFilename, subDir, variant string, include bool, fake bool) {
-	t.Helper()
-	mod := ctx.ModuleForTests(moduleName, variant)
-	outputFiles := mod.OutputFiles(t, "")
-	if len(outputFiles) != 1 {
-		t.Errorf("%q must have single output\n", moduleName)
-		return
-	}
-	snapshotPath := filepath.Join(subDir, snapshotFilename)
-
-	if include {
-		out := singleton.Output(snapshotPath)
-		if fake {
-			if out.Rule == nil {
-				t.Errorf("Missing rule for module %q output file %q", moduleName, outputFiles[0])
-			}
-		} else {
-			if out.Input.String() != outputFiles[0].String() {
-				t.Errorf("The input of snapshot %q must be %q, but %q", moduleName, out.Input.String(), outputFiles[0])
-			}
-		}
-	} else {
-		out := singleton.MaybeOutput(snapshotPath)
-		if out.Rule != nil {
-			t.Errorf("There must be no rule for module %q output file %q", moduleName, outputFiles[0])
-		}
-	}
-}
-
-func checkSnapshot(t *testing.T, ctx *android.TestContext, singleton android.TestingSingleton, moduleName, snapshotFilename, subDir, variant string) {
-	t.Helper()
-	checkSnapshotIncludeExclude(t, ctx, singleton, moduleName, snapshotFilename, subDir, variant, true, false)
-}
-
-func checkSnapshotExclude(t *testing.T, ctx *android.TestContext, singleton android.TestingSingleton, moduleName, snapshotFilename, subDir, variant string) {
-	t.Helper()
-	checkSnapshotIncludeExclude(t, ctx, singleton, moduleName, snapshotFilename, subDir, variant, false, false)
-}
-
-func checkSnapshotRule(t *testing.T, ctx *android.TestContext, singleton android.TestingSingleton, moduleName, snapshotFilename, subDir, variant string) {
-	t.Helper()
-	checkSnapshotIncludeExclude(t, ctx, singleton, moduleName, snapshotFilename, subDir, variant, true, true)
-}
-
 func checkWriteFileOutput(t *testing.T, params android.TestingBuildParams, expected []string) {
 	t.Helper()
 	content := android.ContentFromFileRuleForTests(t, params)
@@ -631,21 +587,21 @@
 
 	snapshotSingleton := ctx.SingletonForTests("vndk-snapshot")
 
-	checkSnapshot(t, ctx, snapshotSingleton, "libvndk", "libvndk.so", vndkCoreLibPath, variant)
-	checkSnapshot(t, ctx, snapshotSingleton, "libvndk", "libvndk.so", vndkCoreLib2ndPath, variant2nd)
-	checkSnapshot(t, ctx, snapshotSingleton, "libvndk_product", "libvndk_product.so", vndkCoreLibPath, variant)
-	checkSnapshot(t, ctx, snapshotSingleton, "libvndk_product", "libvndk_product.so", vndkCoreLib2ndPath, variant2nd)
-	checkSnapshot(t, ctx, snapshotSingleton, "libvndk_sp", "libvndk_sp-x.so", vndkSpLibPath, variant)
-	checkSnapshot(t, ctx, snapshotSingleton, "libvndk_sp", "libvndk_sp-x.so", vndkSpLib2ndPath, variant2nd)
-	checkSnapshot(t, ctx, snapshotSingleton, "libllndk", "libllndk.so", llndkLibPath, variant)
-	checkSnapshot(t, ctx, snapshotSingleton, "libllndk", "libllndk.so", llndkLib2ndPath, variant2nd)
+	CheckSnapshot(t, ctx, snapshotSingleton, "libvndk", "libvndk.so", vndkCoreLibPath, variant)
+	CheckSnapshot(t, ctx, snapshotSingleton, "libvndk", "libvndk.so", vndkCoreLib2ndPath, variant2nd)
+	CheckSnapshot(t, ctx, snapshotSingleton, "libvndk_product", "libvndk_product.so", vndkCoreLibPath, variant)
+	CheckSnapshot(t, ctx, snapshotSingleton, "libvndk_product", "libvndk_product.so", vndkCoreLib2ndPath, variant2nd)
+	CheckSnapshot(t, ctx, snapshotSingleton, "libvndk_sp", "libvndk_sp-x.so", vndkSpLibPath, variant)
+	CheckSnapshot(t, ctx, snapshotSingleton, "libvndk_sp", "libvndk_sp-x.so", vndkSpLib2ndPath, variant2nd)
+	CheckSnapshot(t, ctx, snapshotSingleton, "libllndk", "libllndk.so", llndkLibPath, variant)
+	CheckSnapshot(t, ctx, snapshotSingleton, "libllndk", "libllndk.so", llndkLib2ndPath, variant2nd)
 
 	snapshotConfigsPath := filepath.Join(snapshotVariantPath, "configs")
-	checkSnapshot(t, ctx, snapshotSingleton, "llndk.libraries.txt", "llndk.libraries.txt", snapshotConfigsPath, "")
-	checkSnapshot(t, ctx, snapshotSingleton, "vndkcore.libraries.txt", "vndkcore.libraries.txt", snapshotConfigsPath, "")
-	checkSnapshot(t, ctx, snapshotSingleton, "vndksp.libraries.txt", "vndksp.libraries.txt", snapshotConfigsPath, "")
-	checkSnapshot(t, ctx, snapshotSingleton, "vndkprivate.libraries.txt", "vndkprivate.libraries.txt", snapshotConfigsPath, "")
-	checkSnapshot(t, ctx, snapshotSingleton, "vndkproduct.libraries.txt", "vndkproduct.libraries.txt", snapshotConfigsPath, "")
+	CheckSnapshot(t, ctx, snapshotSingleton, "llndk.libraries.txt", "llndk.libraries.txt", snapshotConfigsPath, "")
+	CheckSnapshot(t, ctx, snapshotSingleton, "vndkcore.libraries.txt", "vndkcore.libraries.txt", snapshotConfigsPath, "")
+	CheckSnapshot(t, ctx, snapshotSingleton, "vndksp.libraries.txt", "vndksp.libraries.txt", snapshotConfigsPath, "")
+	CheckSnapshot(t, ctx, snapshotSingleton, "vndkprivate.libraries.txt", "vndkprivate.libraries.txt", snapshotConfigsPath, "")
+	CheckSnapshot(t, ctx, snapshotSingleton, "vndkproduct.libraries.txt", "vndkproduct.libraries.txt", snapshotConfigsPath, "")
 
 	checkVndkOutput(t, ctx, "vndk/vndk.libraries.txt", []string{
 		"LLNDK: libc.so",
@@ -2643,15 +2599,6 @@
 	return modulesInOrder, allDeps
 }
 
-func getOutputPaths(ctx *android.TestContext, variant string, moduleNames []string) (paths android.Paths) {
-	for _, moduleName := range moduleNames {
-		module := ctx.ModuleForTests(moduleName, variant).Module().(*Module)
-		output := module.outputFile.Path().RelativeToTop()
-		paths = append(paths, output)
-	}
-	return paths
-}
-
 func TestStaticLibDepReordering(t *testing.T) {
 	ctx := testCc(t, `
 	cc_library {
@@ -2679,7 +2626,7 @@
 	moduleA := ctx.ModuleForTests("a", variant).Module().(*Module)
 	actual := ctx.ModuleProvider(moduleA, StaticLibraryInfoProvider).(StaticLibraryInfo).
 		TransitiveStaticLibrariesForOrdering.ToList().RelativeToTop()
-	expected := getOutputPaths(ctx, variant, []string{"a", "c", "b", "d"})
+	expected := GetOutputPaths(ctx, variant, []string{"a", "c", "b", "d"})
 
 	if !reflect.DeepEqual(actual, expected) {
 		t.Errorf("staticDeps orderings were not propagated correctly"+
@@ -2714,7 +2661,7 @@
 	moduleA := ctx.ModuleForTests("a", variant).Module().(*Module)
 	actual := ctx.ModuleProvider(moduleA, StaticLibraryInfoProvider).(StaticLibraryInfo).
 		TransitiveStaticLibrariesForOrdering.ToList().RelativeToTop()
-	expected := getOutputPaths(ctx, variant, []string{"a", "c", "b"})
+	expected := GetOutputPaths(ctx, variant, []string{"a", "c", "b"})
 
 	if !reflect.DeepEqual(actual, expected) {
 		t.Errorf("staticDeps orderings did not account for shared libs"+
@@ -3357,7 +3304,7 @@
 
 	mybin := ctx.ModuleForTests("mybin", "android_arm64_armv8-a").Rule("ld")
 	actual := mybin.Implicits[:2]
-	expected := getOutputPaths(ctx, "android_arm64_armv8-a_static", []string{"libfooB", "libfooC"})
+	expected := GetOutputPaths(ctx, "android_arm64_armv8-a_static", []string{"libfooB", "libfooC"})
 
 	if !reflect.DeepEqual(actual, expected) {
 		t.Errorf("staticDeps orderings were not propagated correctly"+
diff --git a/cc/genrule.go b/cc/genrule.go
index 82d7205..b0efc6c 100644
--- a/cc/genrule.go
+++ b/cc/genrule.go
@@ -103,7 +103,7 @@
 		// If not, we assume modules under proprietary paths are compatible for
 		// BOARD_VNDK_VERSION. The other modules are regarded as AOSP, that is
 		// PLATFORM_VNDK_VERSION.
-		if vndkVersion == "current" || !isVendorProprietaryModule(ctx) {
+		if vndkVersion == "current" || !IsVendorProprietaryModule(ctx) {
 			variants = append(variants, VendorVariationPrefix+ctx.DeviceConfig().PlatformVndkVersion())
 		} else {
 			variants = append(variants, VendorVariationPrefix+vndkVersion)
diff --git a/cc/image.go b/cc/image.go
index c6b209f..9370c40 100644
--- a/cc/image.go
+++ b/cc/image.go
@@ -496,7 +496,7 @@
 		// BOARD_VNDK_VERSION. The other modules are regarded as AOSP, or
 		// PLATFORM_VNDK_VERSION.
 		if m.HasVendorVariant() {
-			if isVendorProprietaryModule(mctx) {
+			if IsVendorProprietaryModule(mctx) {
 				vendorVariants = append(vendorVariants, boardVndkVersion)
 			} else {
 				vendorVariants = append(vendorVariants, platformVndkVersion)
@@ -525,7 +525,7 @@
 				platformVndkVersion,
 				boardVndkVersion,
 			)
-		} else if isVendorProprietaryModule(mctx) {
+		} else if IsVendorProprietaryModule(mctx) {
 			vendorVariants = append(vendorVariants, boardVndkVersion)
 		} else {
 			vendorVariants = append(vendorVariants, platformVndkVersion)
diff --git a/cc/library.go b/cc/library.go
index 5e70c51..44be38d 100644
--- a/cc/library.go
+++ b/cc/library.go
@@ -606,20 +606,14 @@
 	return ok
 }
 
-// collectHeadersForSnapshot collects all exported headers from library.
-// It globs header files in the source tree for exported include directories,
-// and tracks generated header files separately.
-//
-// This is to be called from GenerateAndroidBuildActions, and then collected
-// header files can be retrieved by snapshotHeaders().
-func (l *libraryDecorator) collectHeadersForSnapshot(ctx android.ModuleContext) {
+func GlobHeadersForSnapshot(ctx android.ModuleContext, paths android.Paths) android.Paths {
 	ret := android.Paths{}
 
 	// Headers in the source tree should be globbed. On the contrast, generated headers
 	// can't be globbed, and they should be manually collected.
 	// So, we first filter out intermediate directories (which contains generated headers)
 	// from exported directories, and then glob headers under remaining directories.
-	for _, path := range append(android.CopyOfPaths(l.flagExporter.dirs), l.flagExporter.systemDirs...) {
+	for _, path := range paths {
 		dir := path.String()
 		// Skip if dir is for generated headers
 		if strings.HasPrefix(dir, android.PathForOutput(ctx).String()) {
@@ -635,7 +629,7 @@
 				glob, err := ctx.GlobWithDeps("external/eigen/"+subdir+"/**/*", nil)
 				if err != nil {
 					ctx.ModuleErrorf("glob failed: %#v", err)
-					return
+					return nil
 				}
 				for _, header := range glob {
 					if strings.HasSuffix(header, "/") {
@@ -653,7 +647,7 @@
 		glob, err := ctx.GlobWithDeps(dir+"/**/*", nil)
 		if err != nil {
 			ctx.ModuleErrorf("glob failed: %#v", err)
-			return
+			return nil
 		}
 		isLibcxx := strings.HasPrefix(dir, "external/libcxx/include")
 		for _, header := range glob {
@@ -666,7 +660,7 @@
 			} else {
 				// Filter out only the files with extensions that are headers.
 				found := false
-				for _, ext := range headerExts {
+				for _, ext := range HeaderExts {
 					if strings.HasSuffix(header, ext) {
 						found = true
 						break
@@ -679,15 +673,38 @@
 			ret = append(ret, android.PathForSource(ctx, header))
 		}
 	}
+	return ret
+}
 
-	// Collect generated headers
-	for _, header := range append(android.CopyOfPaths(l.flagExporter.headers), l.flagExporter.deps...) {
+func GlobGeneratedHeadersForSnapshot(ctx android.ModuleContext, paths android.Paths) android.Paths {
+	ret := android.Paths{}
+	for _, header := range paths {
 		// TODO(b/148123511): remove exportedDeps after cleaning up genrule
 		if strings.HasSuffix(header.Base(), "-phony") {
 			continue
 		}
 		ret = append(ret, header)
 	}
+	return ret
+}
+
+// collectHeadersForSnapshot collects all exported headers from library.
+// It globs header files in the source tree for exported include directories,
+// and tracks generated header files separately.
+//
+// This is to be called from GenerateAndroidBuildActions, and then collected
+// header files can be retrieved by snapshotHeaders().
+func (l *libraryDecorator) collectHeadersForSnapshot(ctx android.ModuleContext) {
+	ret := android.Paths{}
+
+	// Headers in the source tree should be globbed. On the contrast, generated headers
+	// can't be globbed, and they should be manually collected.
+	// So, we first filter out intermediate directories (which contains generated headers)
+	// from exported directories, and then glob headers under remaining directories.
+	ret = append(ret, GlobHeadersForSnapshot(ctx, append(android.CopyOfPaths(l.flagExporter.dirs), l.flagExporter.systemDirs...))...)
+
+	// Collect generated headers
+	ret = append(ret, GlobGeneratedHeadersForSnapshot(ctx, append(android.CopyOfPaths(l.flagExporter.headers), l.flagExporter.deps...))...)
 
 	l.collectedSnapshotHeaders = ret
 }
diff --git a/cc/sanitize.go b/cc/sanitize.go
index f486ee4..513730a 100644
--- a/cc/sanitize.go
+++ b/cc/sanitize.go
@@ -854,7 +854,7 @@
 // as vendor snapshot. Such modules must create both cfi and non-cfi variants,
 // except for ones which explicitly disable cfi.
 func needsCfiForVendorSnapshot(mctx android.TopDownMutatorContext) bool {
-	if isVendorProprietaryModule(mctx) {
+	if IsVendorProprietaryModule(mctx) {
 		return false
 	}
 
@@ -1192,7 +1192,7 @@
 				if c.Device() {
 					variations = append(variations, c.ImageVariation())
 				}
-				c.addSharedLibDependenciesWithVersions(mctx, variations, depTag, runtimeLibrary, "", true)
+				AddSharedLibDependenciesWithVersions(mctx, c, variations, depTag, runtimeLibrary, "", true)
 			}
 			// static lib does not have dependency to the runtime library. The
 			// dependency will be added to the executables or shared libs using
diff --git a/cc/snapshot_prebuilt.go b/cc/snapshot_prebuilt.go
index bf11b11..48b7c69 100644
--- a/cc/snapshot_prebuilt.go
+++ b/cc/snapshot_prebuilt.go
@@ -108,7 +108,7 @@
 	}
 )
 
-func (vendorSnapshotImage) init(ctx android.RegistrationContext) {
+func (vendorSnapshotImage) Init(ctx android.RegistrationContext) {
 	ctx.RegisterSingletonType("vendor-snapshot", VendorSnapshotSingleton)
 	ctx.RegisterModuleType("vendor_snapshot", vendorSnapshotFactory)
 	ctx.RegisterModuleType("vendor_snapshot_shared", VendorSnapshotSharedFactory)
@@ -254,11 +254,11 @@
 	return recoverySuffix
 }
 
-var vendorSnapshotImageSingleton vendorSnapshotImage
+var VendorSnapshotImageSingleton vendorSnapshotImage
 var recoverySnapshotImageSingleton recoverySnapshotImage
 
 func init() {
-	vendorSnapshotImageSingleton.init(android.InitRegistrationContext)
+	VendorSnapshotImageSingleton.Init(android.InitRegistrationContext)
 	recoverySnapshotImageSingleton.init(android.InitRegistrationContext)
 }
 
@@ -376,7 +376,7 @@
 var _ android.ImageInterface = (*snapshot)(nil)
 
 func vendorSnapshotFactory() android.Module {
-	return snapshotFactory(vendorSnapshotImageSingleton)
+	return snapshotFactory(VendorSnapshotImageSingleton)
 }
 
 func recoverySnapshotFactory() android.Module {
@@ -475,7 +475,7 @@
 		return
 	}
 
-	images := []snapshotImage{vendorSnapshotImageSingleton, recoverySnapshotImageSingleton}
+	images := []snapshotImage{VendorSnapshotImageSingleton, recoverySnapshotImageSingleton}
 
 	for _, image := range images {
 		if p.image == image {
@@ -724,7 +724,7 @@
 // overrides the vendor variant of the cc shared library with the same name, if BOARD_VNDK_VERSION
 // is set.
 func VendorSnapshotSharedFactory() android.Module {
-	module, prebuilt := snapshotLibraryFactory(vendorSnapshotImageSingleton, snapshotSharedSuffix)
+	module, prebuilt := snapshotLibraryFactory(VendorSnapshotImageSingleton, snapshotSharedSuffix)
 	prebuilt.libraryDecorator.BuildOnlyShared()
 	return module.Init()
 }
@@ -744,7 +744,7 @@
 // overrides the vendor variant of the cc static library with the same name, if BOARD_VNDK_VERSION
 // is set.
 func VendorSnapshotStaticFactory() android.Module {
-	module, prebuilt := snapshotLibraryFactory(vendorSnapshotImageSingleton, snapshotStaticSuffix)
+	module, prebuilt := snapshotLibraryFactory(VendorSnapshotImageSingleton, snapshotStaticSuffix)
 	prebuilt.libraryDecorator.BuildOnlyStatic()
 	return module.Init()
 }
@@ -764,7 +764,7 @@
 // overrides the vendor variant of the cc header library with the same name, if BOARD_VNDK_VERSION
 // is set.
 func VendorSnapshotHeaderFactory() android.Module {
-	module, prebuilt := snapshotLibraryFactory(vendorSnapshotImageSingleton, snapshotHeaderSuffix)
+	module, prebuilt := snapshotLibraryFactory(VendorSnapshotImageSingleton, snapshotHeaderSuffix)
 	prebuilt.libraryDecorator.HeaderOnly()
 	return module.Init()
 }
@@ -842,7 +842,7 @@
 // development/vendor_snapshot/update.py. As a part of vendor snapshot, vendor_snapshot_binary
 // overrides the vendor variant of the cc binary with the same name, if BOARD_VNDK_VERSION is set.
 func VendorSnapshotBinaryFactory() android.Module {
-	return snapshotBinaryFactory(vendorSnapshotImageSingleton, snapshotBinarySuffix)
+	return snapshotBinaryFactory(VendorSnapshotImageSingleton, snapshotBinarySuffix)
 }
 
 // recovery_snapshot_binary is a special prebuilt executable binary which is auto-generated by
@@ -933,7 +933,7 @@
 	}
 	module.linker = prebuilt
 
-	prebuilt.init(module, vendorSnapshotImageSingleton, snapshotObjectSuffix)
+	prebuilt.init(module, VendorSnapshotImageSingleton, snapshotObjectSuffix)
 	module.AddProperties(&prebuilt.properties)
 	return module.Init()
 }
diff --git a/cc/snapshot_utils.go b/cc/snapshot_utils.go
index 8eb6164..7b62603 100644
--- a/cc/snapshot_utils.go
+++ b/cc/snapshot_utils.go
@@ -20,7 +20,7 @@
 )
 
 var (
-	headerExts = []string{".h", ".hh", ".hpp", ".hxx", ".h++", ".inl", ".inc", ".ipp", ".h.generic"}
+	HeaderExts = []string{".h", ".hh", ".hpp", ".hxx", ".h++", ".inl", ".inc", ".ipp", ".h.generic"}
 )
 
 func (m *Module) IsSnapshotLibrary() bool {
@@ -109,7 +109,7 @@
 		return ctx.Config().VndkSnapshotBuildArtifacts()
 	}
 
-	for _, image := range []snapshotImage{vendorSnapshotImageSingleton, recoverySnapshotImageSingleton} {
+	for _, image := range []snapshotImage{VendorSnapshotImageSingleton, recoverySnapshotImageSingleton} {
 		if isSnapshotAware(ctx.DeviceConfig(), m, image.isProprietaryPath(ctx.ModuleDir(), ctx.DeviceConfig()), apexInfo, image) {
 			return true
 		}
diff --git a/cc/testing.go b/cc/testing.go
index 15f7ebb..f5c5ec5 100644
--- a/cc/testing.go
+++ b/cc/testing.go
@@ -15,6 +15,9 @@
 package cc
 
 import (
+	"path/filepath"
+	"testing"
+
 	"android/soong/android"
 	"android/soong/genrule"
 )
@@ -625,7 +628,7 @@
 var PrepareForTestWithCcIncludeVndk = android.GroupFixturePreparers(
 	PrepareForIntegrationTestWithCc,
 	android.FixtureRegisterWithContext(func(ctx android.RegistrationContext) {
-		vendorSnapshotImageSingleton.init(ctx)
+		VendorSnapshotImageSingleton.Init(ctx)
 		recoverySnapshotImageSingleton.init(ctx)
 		ctx.RegisterSingletonType("vndk-snapshot", VndkSnapshotSingleton)
 	}),
@@ -674,7 +677,7 @@
 	ctx.RegisterModuleType("filegroup", android.FileGroupFactory)
 	ctx.RegisterModuleType("vndk_prebuilt_shared", VndkPrebuiltSharedFactory)
 
-	vendorSnapshotImageSingleton.init(ctx)
+	VendorSnapshotImageSingleton.Init(ctx)
 	recoverySnapshotImageSingleton.init(ctx)
 	ctx.RegisterSingletonType("vndk-snapshot", VndkSnapshotSingleton)
 	RegisterVndkLibraryTxtTypes(ctx)
@@ -685,3 +688,64 @@
 
 	return ctx
 }
+
+func checkSnapshotIncludeExclude(t *testing.T, ctx *android.TestContext, singleton android.TestingSingleton, moduleName, snapshotFilename, subDir, variant string, include bool, fake bool) {
+	t.Helper()
+	mod := ctx.ModuleForTests(moduleName, variant)
+	outputFiles := mod.OutputFiles(t, "")
+	if len(outputFiles) != 1 {
+		t.Errorf("%q must have single output\n", moduleName)
+		return
+	}
+	snapshotPath := filepath.Join(subDir, snapshotFilename)
+
+	if include {
+		out := singleton.Output(snapshotPath)
+		if fake {
+			if out.Rule == nil {
+				t.Errorf("Missing rule for module %q output file %q", moduleName, outputFiles[0])
+			}
+		} else {
+			if out.Input.String() != outputFiles[0].String() {
+				t.Errorf("The input of snapshot %q must be %q, but %q", moduleName, out.Input.String(), outputFiles[0])
+			}
+		}
+	} else {
+		out := singleton.MaybeOutput(snapshotPath)
+		if out.Rule != nil {
+			t.Errorf("There must be no rule for module %q output file %q", moduleName, outputFiles[0])
+		}
+	}
+}
+
+func CheckSnapshot(t *testing.T, ctx *android.TestContext, singleton android.TestingSingleton, moduleName, snapshotFilename, subDir, variant string) {
+	t.Helper()
+	checkSnapshotIncludeExclude(t, ctx, singleton, moduleName, snapshotFilename, subDir, variant, true, false)
+}
+
+func CheckSnapshotExclude(t *testing.T, ctx *android.TestContext, singleton android.TestingSingleton, moduleName, snapshotFilename, subDir, variant string) {
+	t.Helper()
+	checkSnapshotIncludeExclude(t, ctx, singleton, moduleName, snapshotFilename, subDir, variant, false, false)
+}
+
+func CheckSnapshotRule(t *testing.T, ctx *android.TestContext, singleton android.TestingSingleton, moduleName, snapshotFilename, subDir, variant string) {
+	t.Helper()
+	checkSnapshotIncludeExclude(t, ctx, singleton, moduleName, snapshotFilename, subDir, variant, true, true)
+}
+
+func AssertExcludeFromVendorSnapshotIs(t *testing.T, ctx *android.TestContext, name string, expected bool, variant string) {
+	t.Helper()
+	m := ctx.ModuleForTests(name, variant).Module().(LinkableInterface)
+	if m.ExcludeFromVendorSnapshot() != expected {
+		t.Errorf("expected %q ExcludeFromVendorSnapshot to be %t", m.String(), expected)
+	}
+}
+
+func GetOutputPaths(ctx *android.TestContext, variant string, moduleNames []string) (paths android.Paths) {
+	for _, moduleName := range moduleNames {
+		module := ctx.ModuleForTests(moduleName, variant).Module().(*Module)
+		output := module.outputFile.Path().RelativeToTop()
+		paths = append(paths, output)
+	}
+	return paths
+}
diff --git a/cc/vendor_public_library_test.go b/cc/vendor_public_library_test.go
index 01959b4..769be09 100644
--- a/cc/vendor_public_library_test.go
+++ b/cc/vendor_public_library_test.go
@@ -79,7 +79,7 @@
 	// test if libsystem is linked to the stub
 	ld := ctx.ModuleForTests("libsystem", coreVariant).Rule("ld")
 	libflags := ld.Args["libFlags"]
-	stubPaths := getOutputPaths(ctx, coreVariant, []string{"libvendorpublic"})
+	stubPaths := GetOutputPaths(ctx, coreVariant, []string{"libvendorpublic"})
 	if !strings.Contains(libflags, stubPaths[0].String()) {
 		t.Errorf("libflags for libsystem must contain %#v, but was %#v", stubPaths[0], libflags)
 	}
@@ -87,7 +87,7 @@
 	// test if libsystem is linked to the stub
 	ld = ctx.ModuleForTests("libproduct", productVariant).Rule("ld")
 	libflags = ld.Args["libFlags"]
-	stubPaths = getOutputPaths(ctx, productVariant, []string{"libvendorpublic"})
+	stubPaths = GetOutputPaths(ctx, productVariant, []string{"libvendorpublic"})
 	if !strings.Contains(libflags, stubPaths[0].String()) {
 		t.Errorf("libflags for libproduct must contain %#v, but was %#v", stubPaths[0], libflags)
 	}
@@ -95,7 +95,8 @@
 	// test if libvendor is linked to the real shared lib
 	ld = ctx.ModuleForTests("libvendor", vendorVariant).Rule("ld")
 	libflags = ld.Args["libFlags"]
-	stubPaths = getOutputPaths(ctx, vendorVariant, []string{"libvendorpublic"})
+	stubPaths = GetOutputPaths(ctx, vendorVariant, []string{"libvendorpublic"})
+
 	if !strings.Contains(libflags, stubPaths[0].String()) {
 		t.Errorf("libflags for libvendor must contain %#v, but was %#v", stubPaths[0], libflags)
 	}
diff --git a/cc/vendor_snapshot.go b/cc/vendor_snapshot.go
index 4e59a95..2c29a89 100644
--- a/cc/vendor_snapshot.go
+++ b/cc/vendor_snapshot.go
@@ -31,7 +31,7 @@
 	"SOONG_VENDOR_SNAPSHOT_ZIP",
 	android.OptionalPath{},
 	true,
-	vendorSnapshotImageSingleton,
+	VendorSnapshotImageSingleton,
 	false, /* fake */
 }
 
@@ -40,7 +40,7 @@
 	"SOONG_VENDOR_FAKE_SNAPSHOT_ZIP",
 	android.OptionalPath{},
 	true,
-	vendorSnapshotImageSingleton,
+	VendorSnapshotImageSingleton,
 	true, /* fake */
 }
 
@@ -104,7 +104,7 @@
 	return RecoverySnapshotSingleton().(*snapshotSingleton).image.isProprietaryPath(dir, deviceConfig)
 }
 
-func isVendorProprietaryModule(ctx android.BaseModuleContext) bool {
+func IsVendorProprietaryModule(ctx android.BaseModuleContext) bool {
 	// Any module in a vendor proprietary path is a vendor proprietary
 	// module.
 	if isVendorProprietaryPath(ctx.ModuleDir(), ctx.DeviceConfig()) {
diff --git a/cc/vendor_snapshot_test.go b/cc/vendor_snapshot_test.go
index c3b5e8c..ceffb29 100644
--- a/cc/vendor_snapshot_test.go
+++ b/cc/vendor_snapshot_test.go
@@ -108,27 +108,27 @@
 		// For shared libraries, only non-VNDK vendor_available modules are captured
 		sharedVariant := fmt.Sprintf("android_vendor.29_%s_%s_shared", archType, archVariant)
 		sharedDir := filepath.Join(snapshotVariantPath, archDir, "shared")
-		checkSnapshot(t, ctx, snapshotSingleton, "libvendor", "libvendor.so", sharedDir, sharedVariant)
-		checkSnapshot(t, ctx, snapshotSingleton, "libvendor_available", "libvendor_available.so", sharedDir, sharedVariant)
+		CheckSnapshot(t, ctx, snapshotSingleton, "libvendor", "libvendor.so", sharedDir, sharedVariant)
+		CheckSnapshot(t, ctx, snapshotSingleton, "libvendor_available", "libvendor_available.so", sharedDir, sharedVariant)
 		jsonFiles = append(jsonFiles,
 			filepath.Join(sharedDir, "libvendor.so.json"),
 			filepath.Join(sharedDir, "libvendor_available.so.json"))
 
 		// LLNDK modules are not captured
-		checkSnapshotExclude(t, ctx, snapshotSingleton, "libllndk", "libllndk.so", sharedDir, sharedVariant)
+		CheckSnapshotExclude(t, ctx, snapshotSingleton, "libllndk", "libllndk.so", sharedDir, sharedVariant)
 
 		// For static libraries, all vendor:true and vendor_available modules (including VNDK) are captured.
 		// Also cfi variants are captured, except for prebuilts like toolchain_library
 		staticVariant := fmt.Sprintf("android_vendor.29_%s_%s_static", archType, archVariant)
 		staticCfiVariant := fmt.Sprintf("android_vendor.29_%s_%s_static_cfi", archType, archVariant)
 		staticDir := filepath.Join(snapshotVariantPath, archDir, "static")
-		checkSnapshot(t, ctx, snapshotSingleton, "libb", "libb.a", staticDir, staticVariant)
-		checkSnapshot(t, ctx, snapshotSingleton, "libvndk", "libvndk.a", staticDir, staticVariant)
-		checkSnapshot(t, ctx, snapshotSingleton, "libvndk", "libvndk.cfi.a", staticDir, staticCfiVariant)
-		checkSnapshot(t, ctx, snapshotSingleton, "libvendor", "libvendor.a", staticDir, staticVariant)
-		checkSnapshot(t, ctx, snapshotSingleton, "libvendor", "libvendor.cfi.a", staticDir, staticCfiVariant)
-		checkSnapshot(t, ctx, snapshotSingleton, "libvendor_available", "libvendor_available.a", staticDir, staticVariant)
-		checkSnapshot(t, ctx, snapshotSingleton, "libvendor_available", "libvendor_available.cfi.a", staticDir, staticCfiVariant)
+		CheckSnapshot(t, ctx, snapshotSingleton, "libb", "libb.a", staticDir, staticVariant)
+		CheckSnapshot(t, ctx, snapshotSingleton, "libvndk", "libvndk.a", staticDir, staticVariant)
+		CheckSnapshot(t, ctx, snapshotSingleton, "libvndk", "libvndk.cfi.a", staticDir, staticCfiVariant)
+		CheckSnapshot(t, ctx, snapshotSingleton, "libvendor", "libvendor.a", staticDir, staticVariant)
+		CheckSnapshot(t, ctx, snapshotSingleton, "libvendor", "libvendor.cfi.a", staticDir, staticCfiVariant)
+		CheckSnapshot(t, ctx, snapshotSingleton, "libvendor_available", "libvendor_available.a", staticDir, staticVariant)
+		CheckSnapshot(t, ctx, snapshotSingleton, "libvendor_available", "libvendor_available.cfi.a", staticDir, staticCfiVariant)
 		jsonFiles = append(jsonFiles,
 			filepath.Join(staticDir, "libb.a.json"),
 			filepath.Join(staticDir, "libvndk.a.json"),
@@ -142,8 +142,8 @@
 		if archType == "arm64" {
 			binaryVariant := fmt.Sprintf("android_vendor.29_%s_%s", archType, archVariant)
 			binaryDir := filepath.Join(snapshotVariantPath, archDir, "binary")
-			checkSnapshot(t, ctx, snapshotSingleton, "vendor_bin", "vendor_bin", binaryDir, binaryVariant)
-			checkSnapshot(t, ctx, snapshotSingleton, "vendor_available_bin", "vendor_available_bin", binaryDir, binaryVariant)
+			CheckSnapshot(t, ctx, snapshotSingleton, "vendor_bin", "vendor_bin", binaryDir, binaryVariant)
+			CheckSnapshot(t, ctx, snapshotSingleton, "vendor_available_bin", "vendor_available_bin", binaryDir, binaryVariant)
 			jsonFiles = append(jsonFiles,
 				filepath.Join(binaryDir, "vendor_bin.json"),
 				filepath.Join(binaryDir, "vendor_available_bin.json"))
@@ -156,7 +156,7 @@
 		// For object modules, all vendor:true and vendor_available modules are captured.
 		objectVariant := fmt.Sprintf("android_vendor.29_%s_%s", archType, archVariant)
 		objectDir := filepath.Join(snapshotVariantPath, archDir, "object")
-		checkSnapshot(t, ctx, snapshotSingleton, "obj", "obj.o", objectDir, objectVariant)
+		CheckSnapshot(t, ctx, snapshotSingleton, "obj", "obj.o", objectDir, objectVariant)
 		jsonFiles = append(jsonFiles, filepath.Join(objectDir, "obj.o.json"))
 	}
 
@@ -239,15 +239,15 @@
 		sharedDir := filepath.Join(snapshotVariantPath, archDir, "shared")
 
 		// Included modules
-		checkSnapshot(t, ctx, snapshotSingleton, "libvendor", "libvendor.so", sharedDir, sharedVariant)
+		CheckSnapshot(t, ctx, snapshotSingleton, "libvendor", "libvendor.so", sharedDir, sharedVariant)
 		includeJsonFiles = append(includeJsonFiles, filepath.Join(sharedDir, "libvendor.so.json"))
 		// Check that snapshot captures "prefer: true" prebuilt
-		checkSnapshot(t, ctx, snapshotSingleton, "prebuilt_libfoo", "libfoo.so", sharedDir, sharedVariant)
+		CheckSnapshot(t, ctx, snapshotSingleton, "prebuilt_libfoo", "libfoo.so", sharedDir, sharedVariant)
 		includeJsonFiles = append(includeJsonFiles, filepath.Join(sharedDir, "libfoo.so.json"))
 
 		// Excluded modules. Modules not included in the directed vendor snapshot
 		// are still include as fake modules.
-		checkSnapshotRule(t, ctx, snapshotSingleton, "libvendor_available", "libvendor_available.so", sharedDir, sharedVariant)
+		CheckSnapshotRule(t, ctx, snapshotSingleton, "libvendor_available", "libvendor_available.so", sharedDir, sharedVariant)
 		includeJsonFiles = append(includeJsonFiles, filepath.Join(sharedDir, "libvendor_available.so.json"))
 	}
 
@@ -839,10 +839,11 @@
 		[]string{staticVariant, "libvendor.vendor_static.31.arm64"},
 		[]string{staticVariant, "libvendor_without_snapshot"},
 	} {
-		outputPaths := getOutputPaths(ctx, input[0] /* variant */, []string{input[1]} /* module name */)
+		outputPaths := GetOutputPaths(ctx, input[0] /* variant */, []string{input[1]} /* module name */)
 		if !strings.Contains(libclientLdFlags, outputPaths[0].String()) {
 			t.Errorf("libflags for libclient must contain %#v, but was %#v", outputPaths[0], libclientLdFlags)
 		}
+
 	}
 
 	libclientAndroidMkSharedLibs := ctx.ModuleForTests("libclient", sharedVariant).Module().(*Module).Properties.AndroidMkSharedLibs
@@ -868,7 +869,7 @@
 	}
 
 	libclientCfiLdFlags := ctx.ModuleForTests("libclient_cfi", sharedCfiVariant).Rule("ld").Args["libFlags"]
-	libvendorCfiOutputPaths := getOutputPaths(ctx, staticCfiVariant, []string{"libvendor.vendor_static.31.arm64"})
+	libvendorCfiOutputPaths := GetOutputPaths(ctx, staticCfiVariant, []string{"libvendor.vendor_static.31.arm64"})
 	if !strings.Contains(libclientCfiLdFlags, libvendorCfiOutputPaths[0].String()) {
 		t.Errorf("libflags for libclientCfi must contain %#v, but was %#v", libvendorCfiOutputPaths[0], libclientCfiLdFlags)
 	}
@@ -881,7 +882,7 @@
 	}
 
 	binWithoutSnapshotLdFlags := ctx.ModuleForTests("bin_without_snapshot", binaryVariant).Rule("ld").Args["libFlags"]
-	libVndkStaticOutputPaths := getOutputPaths(ctx, staticVariant, []string{"libvndk.vendor_static.31.arm64"})
+	libVndkStaticOutputPaths := GetOutputPaths(ctx, staticVariant, []string{"libvndk.vendor_static.31.arm64"})
 	if !strings.Contains(binWithoutSnapshotLdFlags, libVndkStaticOutputPaths[0].String()) {
 		t.Errorf("libflags for bin_without_snapshot must contain %#v, but was %#v",
 			libVndkStaticOutputPaths[0], binWithoutSnapshotLdFlags)
@@ -1006,14 +1007,6 @@
 	assertString(t, staticCfiModule.outputFile.Path().Base(), "libsnapshot.cfi.a")
 }
 
-func assertExcludeFromVendorSnapshotIs(t *testing.T, ctx *android.TestContext, name string, expected bool) {
-	t.Helper()
-	m := ctx.ModuleForTests(name, vendorVariant).Module().(*Module)
-	if m.ExcludeFromVendorSnapshot() != expected {
-		t.Errorf("expected %q ExcludeFromVendorSnapshot to be %t", m.String(), expected)
-	}
-}
-
 func assertExcludeFromRecoverySnapshotIs(t *testing.T, ctx *android.TestContext, name string, expected bool) {
 	t.Helper()
 	m := ctx.ModuleForTests(name, recoveryVariant).Module().(*Module)
@@ -1081,13 +1074,13 @@
 	android.FailIfErrored(t, errs)
 
 	// Test an include and exclude framework module.
-	assertExcludeFromVendorSnapshotIs(t, ctx, "libinclude", false)
-	assertExcludeFromVendorSnapshotIs(t, ctx, "libexclude", true)
-	assertExcludeFromVendorSnapshotIs(t, ctx, "libavailable_exclude", true)
+	AssertExcludeFromVendorSnapshotIs(t, ctx, "libinclude", false, vendorVariant)
+	AssertExcludeFromVendorSnapshotIs(t, ctx, "libexclude", true, vendorVariant)
+	AssertExcludeFromVendorSnapshotIs(t, ctx, "libavailable_exclude", true, vendorVariant)
 
 	// A vendor module is excluded, but by its path, not the
 	// exclude_from_vendor_snapshot property.
-	assertExcludeFromVendorSnapshotIs(t, ctx, "libvendor", false)
+	AssertExcludeFromVendorSnapshotIs(t, ctx, "libvendor", false, vendorVariant)
 
 	// Verify the content of the vendor snapshot.
 
@@ -1110,15 +1103,15 @@
 		sharedDir := filepath.Join(snapshotVariantPath, archDir, "shared")
 
 		// Included modules
-		checkSnapshot(t, ctx, snapshotSingleton, "libinclude", "libinclude.so", sharedDir, sharedVariant)
+		CheckSnapshot(t, ctx, snapshotSingleton, "libinclude", "libinclude.so", sharedDir, sharedVariant)
 		includeJsonFiles = append(includeJsonFiles, filepath.Join(sharedDir, "libinclude.so.json"))
 
 		// Excluded modules
-		checkSnapshotExclude(t, ctx, snapshotSingleton, "libexclude", "libexclude.so", sharedDir, sharedVariant)
+		CheckSnapshotExclude(t, ctx, snapshotSingleton, "libexclude", "libexclude.so", sharedDir, sharedVariant)
 		excludeJsonFiles = append(excludeJsonFiles, filepath.Join(sharedDir, "libexclude.so.json"))
-		checkSnapshotExclude(t, ctx, snapshotSingleton, "libvendor", "libvendor.so", sharedDir, sharedVariant)
+		CheckSnapshotExclude(t, ctx, snapshotSingleton, "libvendor", "libvendor.so", sharedDir, sharedVariant)
 		excludeJsonFiles = append(excludeJsonFiles, filepath.Join(sharedDir, "libvendor.so.json"))
-		checkSnapshotExclude(t, ctx, snapshotSingleton, "libavailable_exclude", "libavailable_exclude.so", sharedDir, sharedVariant)
+		CheckSnapshotExclude(t, ctx, snapshotSingleton, "libavailable_exclude", "libavailable_exclude.so", sharedDir, sharedVariant)
 		excludeJsonFiles = append(excludeJsonFiles, filepath.Join(sharedDir, "libavailable_exclude.so.json"))
 	}
 
@@ -1258,9 +1251,9 @@
 		// For shared libraries, only recovery_available modules are captured.
 		sharedVariant := fmt.Sprintf("android_recovery_%s_%s_shared", archType, archVariant)
 		sharedDir := filepath.Join(snapshotVariantPath, archDir, "shared")
-		checkSnapshot(t, ctx, snapshotSingleton, "libvndk", "libvndk.so", sharedDir, sharedVariant)
-		checkSnapshot(t, ctx, snapshotSingleton, "librecovery", "librecovery.so", sharedDir, sharedVariant)
-		checkSnapshot(t, ctx, snapshotSingleton, "librecovery_available", "librecovery_available.so", sharedDir, sharedVariant)
+		CheckSnapshot(t, ctx, snapshotSingleton, "libvndk", "libvndk.so", sharedDir, sharedVariant)
+		CheckSnapshot(t, ctx, snapshotSingleton, "librecovery", "librecovery.so", sharedDir, sharedVariant)
+		CheckSnapshot(t, ctx, snapshotSingleton, "librecovery_available", "librecovery_available.so", sharedDir, sharedVariant)
 		jsonFiles = append(jsonFiles,
 			filepath.Join(sharedDir, "libvndk.so.json"),
 			filepath.Join(sharedDir, "librecovery.so.json"),
@@ -1269,9 +1262,9 @@
 		// For static libraries, all recovery:true and recovery_available modules are captured.
 		staticVariant := fmt.Sprintf("android_recovery_%s_%s_static", archType, archVariant)
 		staticDir := filepath.Join(snapshotVariantPath, archDir, "static")
-		checkSnapshot(t, ctx, snapshotSingleton, "libb", "libb.a", staticDir, staticVariant)
-		checkSnapshot(t, ctx, snapshotSingleton, "librecovery", "librecovery.a", staticDir, staticVariant)
-		checkSnapshot(t, ctx, snapshotSingleton, "librecovery_available", "librecovery_available.a", staticDir, staticVariant)
+		CheckSnapshot(t, ctx, snapshotSingleton, "libb", "libb.a", staticDir, staticVariant)
+		CheckSnapshot(t, ctx, snapshotSingleton, "librecovery", "librecovery.a", staticDir, staticVariant)
+		CheckSnapshot(t, ctx, snapshotSingleton, "librecovery_available", "librecovery_available.a", staticDir, staticVariant)
 		jsonFiles = append(jsonFiles,
 			filepath.Join(staticDir, "libb.a.json"),
 			filepath.Join(staticDir, "librecovery.a.json"),
@@ -1281,8 +1274,8 @@
 		if archType == "arm64" {
 			binaryVariant := fmt.Sprintf("android_recovery_%s_%s", archType, archVariant)
 			binaryDir := filepath.Join(snapshotVariantPath, archDir, "binary")
-			checkSnapshot(t, ctx, snapshotSingleton, "recovery_bin", "recovery_bin", binaryDir, binaryVariant)
-			checkSnapshot(t, ctx, snapshotSingleton, "recovery_available_bin", "recovery_available_bin", binaryDir, binaryVariant)
+			CheckSnapshot(t, ctx, snapshotSingleton, "recovery_bin", "recovery_bin", binaryDir, binaryVariant)
+			CheckSnapshot(t, ctx, snapshotSingleton, "recovery_available_bin", "recovery_available_bin", binaryDir, binaryVariant)
 			jsonFiles = append(jsonFiles,
 				filepath.Join(binaryDir, "recovery_bin.json"),
 				filepath.Join(binaryDir, "recovery_available_bin.json"))
@@ -1295,7 +1288,7 @@
 		// For object modules, all vendor:true and vendor_available modules are captured.
 		objectVariant := fmt.Sprintf("android_recovery_%s_%s", archType, archVariant)
 		objectDir := filepath.Join(snapshotVariantPath, archDir, "object")
-		checkSnapshot(t, ctx, snapshotSingleton, "obj", "obj.o", objectDir, objectVariant)
+		CheckSnapshot(t, ctx, snapshotSingleton, "obj", "obj.o", objectDir, objectVariant)
 		jsonFiles = append(jsonFiles, filepath.Join(objectDir, "obj.o.json"))
 	}
 
@@ -1393,15 +1386,15 @@
 		sharedDir := filepath.Join(snapshotVariantPath, archDir, "shared")
 
 		// Included modules
-		checkSnapshot(t, ctx, snapshotSingleton, "libinclude", "libinclude.so", sharedDir, sharedVariant)
+		CheckSnapshot(t, ctx, snapshotSingleton, "libinclude", "libinclude.so", sharedDir, sharedVariant)
 		includeJsonFiles = append(includeJsonFiles, filepath.Join(sharedDir, "libinclude.so.json"))
 
 		// Excluded modules
-		checkSnapshotExclude(t, ctx, snapshotSingleton, "libexclude", "libexclude.so", sharedDir, sharedVariant)
+		CheckSnapshotExclude(t, ctx, snapshotSingleton, "libexclude", "libexclude.so", sharedDir, sharedVariant)
 		excludeJsonFiles = append(excludeJsonFiles, filepath.Join(sharedDir, "libexclude.so.json"))
-		checkSnapshotExclude(t, ctx, snapshotSingleton, "librecovery", "librecovery.so", sharedDir, sharedVariant)
+		CheckSnapshotExclude(t, ctx, snapshotSingleton, "librecovery", "librecovery.so", sharedDir, sharedVariant)
 		excludeJsonFiles = append(excludeJsonFiles, filepath.Join(sharedDir, "librecovery.so.json"))
-		checkSnapshotExclude(t, ctx, snapshotSingleton, "libavailable_exclude", "libavailable_exclude.so", sharedDir, sharedVariant)
+		CheckSnapshotExclude(t, ctx, snapshotSingleton, "libavailable_exclude", "libavailable_exclude.so", sharedDir, sharedVariant)
 		excludeJsonFiles = append(excludeJsonFiles, filepath.Join(sharedDir, "libavailable_exclude.so.json"))
 	}
 
@@ -1482,15 +1475,15 @@
 		sharedDir := filepath.Join(snapshotVariantPath, archDir, "shared")
 
 		// Included modules
-		checkSnapshot(t, ctx, snapshotSingleton, "librecovery", "librecovery.so", sharedDir, sharedVariant)
+		CheckSnapshot(t, ctx, snapshotSingleton, "librecovery", "librecovery.so", sharedDir, sharedVariant)
 		includeJsonFiles = append(includeJsonFiles, filepath.Join(sharedDir, "librecovery.so.json"))
 		// Check that snapshot captures "prefer: true" prebuilt
-		checkSnapshot(t, ctx, snapshotSingleton, "prebuilt_libfoo", "libfoo.so", sharedDir, sharedVariant)
+		CheckSnapshot(t, ctx, snapshotSingleton, "prebuilt_libfoo", "libfoo.so", sharedDir, sharedVariant)
 		includeJsonFiles = append(includeJsonFiles, filepath.Join(sharedDir, "libfoo.so.json"))
 
 		// Excluded modules. Modules not included in the directed recovery snapshot
 		// are still include as fake modules.
-		checkSnapshotRule(t, ctx, snapshotSingleton, "librecovery_available", "librecovery_available.so", sharedDir, sharedVariant)
+		CheckSnapshotRule(t, ctx, snapshotSingleton, "librecovery_available", "librecovery_available.so", sharedDir, sharedVariant)
 		includeJsonFiles = append(includeJsonFiles, filepath.Join(sharedDir, "librecovery_available.so.json"))
 	}