Merge "Generate combined deps-info for all updatable modules."
diff --git a/android/config.go b/android/config.go
index ee31c10..59118ce 100644
--- a/android/config.go
+++ b/android/config.go
@@ -897,27 +897,31 @@
 }
 
 // Expected format for apexJarValue = <apex name>:<jar name>
-func SplitApexJarPair(apexJarValue string) (string, string) {
-	var apexJarPair []string = strings.SplitN(apexJarValue, ":", 2)
-	if apexJarPair == nil || len(apexJarPair) != 2 {
-		panic(fmt.Errorf("malformed apexJarValue: %q, expected format: <apex>:<jar>",
-			apexJarValue))
+func SplitApexJarPair(ctx PathContext, str string) (string, string) {
+	pair := strings.SplitN(str, ":", 2)
+	if len(pair) == 2 {
+		return pair[0], pair[1]
+	} else {
+		reportPathErrorf(ctx, "malformed (apex, jar) pair: '%s', expected format: <apex>:<jar>", str)
+		return "error-apex", "error-jar"
 	}
-	return apexJarPair[0], apexJarPair[1]
 }
 
-func GetJarsFromApexJarPairs(apexJarPairs []string) []string {
+func GetJarsFromApexJarPairs(ctx PathContext, apexJarPairs []string) []string {
 	modules := make([]string, len(apexJarPairs))
 	for i, p := range apexJarPairs {
-		_, jar := SplitApexJarPair(p)
+		_, jar := SplitApexJarPair(ctx, p)
 		modules[i] = jar
 	}
 	return modules
 }
 
 func (c *config) BootJars() []string {
-	return append(GetJarsFromApexJarPairs(c.productVariables.BootJars),
-		GetJarsFromApexJarPairs(c.productVariables.UpdatableBootJars)...)
+	ctx := NullPathContext{Config{
+		config: c,
+	}}
+	return append(GetJarsFromApexJarPairs(ctx, c.productVariables.BootJars),
+		GetJarsFromApexJarPairs(ctx, c.productVariables.UpdatableBootJars)...)
 }
 
 func (c *config) DexpreoptGlobalConfig(ctx PathContext) ([]byte, error) {
diff --git a/android/module.go b/android/module.go
index 7e64f0a..45477ea 100644
--- a/android/module.go
+++ b/android/module.go
@@ -104,6 +104,8 @@
 type BaseModuleContext interface {
 	EarlyModuleContext
 
+	blueprintBaseModuleContext() blueprint.BaseModuleContext
+
 	OtherModuleName(m blueprint.Module) string
 	OtherModuleDir(m blueprint.Module) string
 	OtherModuleErrorf(m blueprint.Module, fmt string, args ...interface{})
@@ -1439,6 +1441,10 @@
 	return b.bp.GetDirectDepWithTag(name, tag)
 }
 
+func (b *baseModuleContext) blueprintBaseModuleContext() blueprint.BaseModuleContext {
+	return b.bp
+}
+
 type moduleContext struct {
 	bp blueprint.ModuleContext
 	baseModuleContext
@@ -2361,3 +2367,8 @@
 	Installed_paths   []string `json:"installed,omitempty"`
 	SrcJars           []string `json:"srcjars,omitempty"`
 }
+
+func CheckBlueprintSyntax(ctx BaseModuleContext, filename string, contents string) []error {
+	bpctx := ctx.blueprintBaseModuleContext()
+	return blueprint.CheckBlueprintSyntax(bpctx.ModuleFactories(), filename, contents)
+}
diff --git a/android/paths.go b/android/paths.go
index 8bb9a96..fcea65c 100644
--- a/android/paths.go
+++ b/android/paths.go
@@ -43,6 +43,14 @@
 var _ PathContext = SingletonContext(nil)
 var _ PathContext = ModuleContext(nil)
 
+// "Null" path context is a minimal path context for a given config.
+type NullPathContext struct {
+	config Config
+}
+
+func (NullPathContext) AddNinjaFileDeps(...string) {}
+func (ctx NullPathContext) Config() Config         { return ctx.config }
+
 type ModuleInstallPathContext interface {
 	BaseModuleContext
 
diff --git a/apex/androidmk.go b/apex/androidmk.go
index 09d3607..6b168fe 100644
--- a/apex/androidmk.go
+++ b/apex/androidmk.go
@@ -121,7 +121,7 @@
 				fmt.Fprintln(w, "LOCAL_MODULE_SYMLINKS :=", strings.Join(fi.symlinks, " "))
 			}
 			if len(fi.dataPaths) > 0 {
-				fmt.Println(w, "LOCAL_TEST_DATA :=", strings.Join(cc.AndroidMkDataPaths(fi.dataPaths), " "))
+				fmt.Fprintln(w, "LOCAL_TEST_DATA :=", strings.Join(cc.AndroidMkDataPaths(fi.dataPaths), " "))
 			}
 
 			if fi.module != nil && len(fi.module.NoticeFiles()) > 0 {
diff --git a/apex/apex.go b/apex/apex.go
index fafa3f8..4fee6e2 100644
--- a/apex/apex.go
+++ b/apex/apex.go
@@ -287,7 +287,10 @@
 		"android.hidl.token@1.0",
 		"android.hidl.token@1.0-utils",
 		"bionic_libc_platform_headers",
+		"exoplayer2-extractor",
+		"exoplayer2-extractor-annotation-stubs",
 		"gl_headers",
+		"jsr305",
 		"libEGL",
 		"libEGL_blobCache",
 		"libEGL_getProcAddress",
@@ -542,12 +545,6 @@
 	// Module separator
 	//
 	m["com.android.permission"] = []string{
-		"androidx.annotation_annotation",
-		"androidx.annotation_annotation-nodeps",
-		"androidx.lifecycle_lifecycle-common",
-		"androidx.lifecycle_lifecycle-common-java8",
-		"androidx.lifecycle_lifecycle-common-java8-nodeps",
-		"androidx.lifecycle_lifecycle-common-nodeps",
 		"kotlin-annotations",
 		"kotlin-stdlib",
 		"kotlin-stdlib-jdk7",
@@ -618,13 +615,21 @@
 	// Module separator
 	//
 	m["com.android.tethering"] = []string{
-		"libnativehelper_compat_libc++",
-		"android.hardware.tetheroffload.config@1.0",
+		"android.hardware.tetheroffload.config-V1.0-java",
+		"android.hardware.tetheroffload.control-V1.0-java",
+		"android.hidl.base-V1.0-java",
+		"ipmemorystore-aidl-interfaces-java",
 		"libcgrouprc",
 		"libcgrouprc_format",
+		"libnativehelper_compat_libc++",
 		"libtetherutilsjni",
 		"libvndksupport",
+		"net-utils-framework-common",
+		"netd_aidl_interface-V3-java",
+		"netlink-client",
+		"networkstack-aidl-interfaces-java",
 		"tethering-aidl-interfaces-java",
+		"TetheringApiCurrentLib",
 	}
 	//
 	// Module separator
@@ -648,8 +653,6 @@
 		"android.hidl.manager-V1.0-java",
 		"android.hidl.manager-V1.1-java",
 		"android.hidl.manager-V1.2-java",
-		"androidx.annotation_annotation",
-		"androidx.annotation_annotation-nodeps",
 		"bouncycastle-unbundled",
 		"dnsresolver_aidl_interface-V2-java",
 		"error_prone_annotations",
@@ -671,7 +674,6 @@
 		"wifi-nano-protos",
 		"wifi-service-pre-jarjar",
 		"wifi-service-resources",
-		"prebuilt_androidx.annotation_annotation-nodeps",
 	}
 	//
 	// Module separator
@@ -691,6 +693,15 @@
 	// Module separator
 	//
 	m[android.AvailableToAnyApex] = []string{
+		// TODO(b/156996905) Set apex_available/min_sdk_version for androidx/extras support libraries
+		"androidx",
+		"androidx-constraintlayout_constraintlayout",
+		"androidx-constraintlayout_constraintlayout-nodeps",
+		"androidx-constraintlayout_constraintlayout-solver",
+		"androidx-constraintlayout_constraintlayout-solver-nodeps",
+		"com.google.android.material_material",
+		"com.google.android.material_material-nodeps",
+
 		"libatomic",
 		"libclang_rt",
 		"libgcc_stripped",
@@ -710,6 +721,7 @@
 	android.RegisterModuleType("apex_defaults", defaultsFactory)
 	android.RegisterModuleType("prebuilt_apex", PrebuiltFactory)
 	android.RegisterModuleType("override_apex", overrideApexFactory)
+	android.RegisterModuleType("apex_set", apexSetFactory)
 
 	android.PreDepsMutators(RegisterPreDepsMutators)
 	android.PostDepsMutators(RegisterPostDepsMutators)
@@ -1450,19 +1462,7 @@
 					target,
 					a.getImageVariation(config))
 			}
-
-			if strings.HasPrefix(ctx.ModuleName(), "com.android.runtime") && target.Os.Class == android.Device {
-				for _, sanitizer := range ctx.Config().SanitizeDevice() {
-					if sanitizer == "hwaddress" {
-						addDependenciesForNativeModules(ctx,
-							ApexNativeDependencies{[]string{"libclang_rt.hwasan-aarch64-android"}, nil, nil, nil},
-							target, a.getImageVariation(config))
-						break
-					}
-				}
-			}
 		}
-
 	}
 
 	// For prebuilt_etc, use the first variant (64 on 64/32bit device,
@@ -1594,6 +1594,21 @@
 	return android.InList(sanitizerName, globalSanitizerNames)
 }
 
+func (a *apexBundle) AddSanitizerDependencies(ctx android.BottomUpMutatorContext, sanitizerName string) {
+	if ctx.Device() && sanitizerName == "hwaddress" && strings.HasPrefix(a.Name(), "com.android.runtime") {
+		for _, target := range ctx.MultiTargets() {
+			if target.Arch.ArchType.Multilib == "lib64" {
+				ctx.AddFarVariationDependencies(append(target.Variations(), []blueprint.Variation{
+					{Mutator: "image", Variation: a.getImageVariation(ctx.DeviceConfig())},
+					{Mutator: "link", Variation: "shared"},
+					{Mutator: "version", Variation: ""}, // "" is the non-stub variant
+				}...), sharedLibTag, "libclang_rt.hwasan-aarch64-android")
+				break
+			}
+		}
+	}
+}
+
 var _ cc.Coverage = (*apexBundle)(nil)
 
 func (a *apexBundle) IsNativeCoverageNeeded(ctx android.BaseModuleContext) bool {
@@ -1853,6 +1868,51 @@
 	}
 }
 
+// Ensures that a lib providing stub isn't statically linked
+func (a *apexBundle) checkStaticLinkingToStubLibraries(ctx android.ModuleContext) {
+	// Practically, we only care about regular APEXes on the device.
+	if ctx.Host() || a.testApex || a.vndkApex {
+		return
+	}
+
+	a.walkPayloadDeps(ctx, func(ctx android.ModuleContext, from blueprint.Module, to android.ApexModule, externalDep bool) bool {
+		if ccm, ok := to.(*cc.Module); ok {
+			apexName := ctx.ModuleName()
+			fromName := ctx.OtherModuleName(from)
+			toName := ctx.OtherModuleName(to)
+
+			// If `to` is not actually in the same APEX as `from` then it does not need apex_available and neither
+			// do any of its dependencies.
+			if am, ok := from.(android.DepIsInSameApex); ok && !am.DepIsInSameApex(ctx, to) {
+				// As soon as the dependency graph crosses the APEX boundary, don't go further.
+				return false
+			}
+
+			// TODO(jiyong) remove this check when R is published to AOSP. Currently, libstatssocket
+			// is capable of providing a stub variant, but is being statically linked from the bluetooth
+			// APEX.
+			if toName == "libstatssocket" {
+				return false
+			}
+
+			// The dynamic linker and crash_dump tool in the runtime APEX is the only exception to this rule.
+			// It can't make the static dependencies dynamic because it can't
+			// do the dynamic linking for itself.
+			if apexName == "com.android.runtime" && (fromName == "linker" || fromName == "crash_dump") {
+				return false
+			}
+
+			isStubLibraryFromOtherApex := ccm.HasStubsVariants() && !android.DirectlyInApex(apexName, toName)
+			if isStubLibraryFromOtherApex && !externalDep {
+				ctx.ModuleErrorf("%q required by %q is a native library providing stub. "+
+					"It shouldn't be included in this APEX via static linking. Dependency path: %s", to.String(), fromName, ctx.GetPathString(false))
+			}
+
+		}
+		return true
+	})
+}
+
 func (a *apexBundle) GenerateAndroidBuildActions(ctx android.ModuleContext) {
 	buildFlattenedAsDefault := ctx.Config().FlattenApex() && !ctx.Config().UnbundledBuild()
 	switch a.properties.ApexType {
@@ -1890,6 +1950,7 @@
 
 	a.checkApexAvailability(ctx)
 	a.checkUpdatable(ctx)
+	a.checkStaticLinkingToStubLibraries(ctx)
 
 	handleSpecialLibs := !android.Bool(a.properties.Ignore_system_library_special_case)
 
@@ -2250,6 +2311,10 @@
 		// We don't want to list them all
 		moduleName = "libclang_rt"
 	}
+	if strings.HasPrefix(moduleName, "androidx.") {
+		// TODO(b/156996905) Set apex_available/min_sdk_version for androidx support libraries
+		moduleName = "androidx"
+	}
 	return moduleName
 }
 
diff --git a/apex/apex_test.go b/apex/apex_test.go
index 021c3e2..cbe5953 100644
--- a/apex/apex_test.go
+++ b/apex/apex_test.go
@@ -175,6 +175,7 @@
 		"testkey2.pem":                               nil,
 		"myapex-arm64.apex":                          nil,
 		"myapex-arm.apex":                            nil,
+		"myapex.apks":                                nil,
 		"frameworks/base/api/current.txt":            nil,
 		"framework/aidl/a.aidl":                      nil,
 		"build/make/core/proguard.flags":             nil,
@@ -218,6 +219,7 @@
 	ctx.RegisterModuleType("apex_defaults", defaultsFactory)
 	ctx.RegisterModuleType("prebuilt_apex", PrebuiltFactory)
 	ctx.RegisterModuleType("override_apex", overrideApexFactory)
+	ctx.RegisterModuleType("apex_set", apexSetFactory)
 
 	ctx.PreArchMutators(android.RegisterDefaultsPreArchMutators)
 	ctx.PostDepsMutators(android.RegisterOverridePostDepsMutators)
@@ -907,6 +909,130 @@
 
 }
 
+func TestRuntimeApexShouldInstallHwasanIfLibcDependsOnIt(t *testing.T) {
+	ctx, _ := testApex(t, "", func(fs map[string][]byte, config android.Config) {
+		bp := `
+		apex {
+			name: "com.android.runtime",
+			key: "com.android.runtime.key",
+			native_shared_libs: ["libc"],
+		}
+
+		apex_key {
+			name: "com.android.runtime.key",
+			public_key: "testkey.avbpubkey",
+			private_key: "testkey.pem",
+		}
+
+		cc_library {
+			name: "libc",
+			no_libcrt: true,
+			nocrt: true,
+			stl: "none",
+			system_shared_libs: [],
+			stubs: { versions: ["1"] },
+			apex_available: ["com.android.runtime"],
+
+			sanitize: {
+				hwaddress: true,
+			}
+		}
+
+		cc_prebuilt_library_shared {
+			name: "libclang_rt.hwasan-aarch64-android",
+			no_libcrt: true,
+			nocrt: true,
+			stl: "none",
+			system_shared_libs: [],
+			srcs: [""],
+			stubs: { versions: ["1"] },
+
+			sanitize: {
+				never: true,
+			},
+		}
+		`
+		// override bp to use hard-coded names: com.android.runtime and libc
+		fs["Android.bp"] = []byte(bp)
+		fs["system/sepolicy/apex/com.android.runtime-file_contexts"] = nil
+	})
+
+	ensureExactContents(t, ctx, "com.android.runtime", "android_common_hwasan_com.android.runtime_image", []string{
+		"lib64/bionic/libc.so",
+		"lib64/bionic/libclang_rt.hwasan-aarch64-android.so",
+	})
+
+	hwasan := ctx.ModuleForTests("libclang_rt.hwasan-aarch64-android", "android_arm64_armv8-a_shared")
+
+	installed := hwasan.Description("install libclang_rt.hwasan")
+	ensureContains(t, installed.Output.String(), "/system/lib64/bootstrap/libclang_rt.hwasan-aarch64-android.so")
+
+	symlink := hwasan.Description("install symlink libclang_rt.hwasan")
+	ensureEquals(t, symlink.Args["fromPath"], "/apex/com.android.runtime/lib64/bionic/libclang_rt.hwasan-aarch64-android.so")
+	ensureContains(t, symlink.Output.String(), "/system/lib64/libclang_rt.hwasan-aarch64-android.so")
+}
+
+func TestRuntimeApexShouldInstallHwasanIfHwaddressSanitized(t *testing.T) {
+	ctx, _ := testApex(t, "", func(fs map[string][]byte, config android.Config) {
+		bp := `
+		apex {
+			name: "com.android.runtime",
+			key: "com.android.runtime.key",
+			native_shared_libs: ["libc"],
+		}
+
+		apex_key {
+			name: "com.android.runtime.key",
+			public_key: "testkey.avbpubkey",
+			private_key: "testkey.pem",
+		}
+
+		cc_library {
+			name: "libc",
+			no_libcrt: true,
+			nocrt: true,
+			stl: "none",
+			system_shared_libs: [],
+			stubs: { versions: ["1"] },
+			apex_available: ["com.android.runtime"],
+		}
+
+		cc_prebuilt_library_shared {
+			name: "libclang_rt.hwasan-aarch64-android",
+			no_libcrt: true,
+			nocrt: true,
+			stl: "none",
+			system_shared_libs: [],
+			srcs: [""],
+			stubs: { versions: ["1"] },
+
+			sanitize: {
+				never: true,
+			},
+		}
+		`
+		// override bp to use hard-coded names: com.android.runtime and libc
+		fs["Android.bp"] = []byte(bp)
+		fs["system/sepolicy/apex/com.android.runtime-file_contexts"] = nil
+
+		config.TestProductVariables.SanitizeDevice = []string{"hwaddress"}
+	})
+
+	ensureExactContents(t, ctx, "com.android.runtime", "android_common_hwasan_com.android.runtime_image", []string{
+		"lib64/bionic/libc.so",
+		"lib64/bionic/libclang_rt.hwasan-aarch64-android.so",
+	})
+
+	hwasan := ctx.ModuleForTests("libclang_rt.hwasan-aarch64-android", "android_arm64_armv8-a_shared")
+
+	installed := hwasan.Description("install libclang_rt.hwasan")
+	ensureContains(t, installed.Output.String(), "/system/lib64/bootstrap/libclang_rt.hwasan-aarch64-android.so")
+
+	symlink := hwasan.Description("install symlink libclang_rt.hwasan")
+	ensureEquals(t, symlink.Args["fromPath"], "/apex/com.android.runtime/lib64/bionic/libclang_rt.hwasan-aarch64-android.so")
+	ensureContains(t, symlink.Output.String(), "/system/lib64/libclang_rt.hwasan-aarch64-android.so")
+}
+
 func TestApexDependsOnLLNDKTransitively(t *testing.T) {
 	testcases := []struct {
 		name          string
@@ -4506,10 +4632,78 @@
 	ensureContains(t, content, `"apex_config":{"apex_embedded_apk_config":[{"package_name":"com.android.foo","path":"app/AppFoo/AppFoo.apk"}]}`)
 }
 
-func testNoUpdatableJarsInBootImage(t *testing.T, errmsg, bp string, transformDexpreoptConfig func(*dexpreopt.GlobalConfig)) {
+func testNoUpdatableJarsInBootImage(t *testing.T, errmsg string, transformDexpreoptConfig func(*dexpreopt.GlobalConfig)) {
 	t.Helper()
 
-	bp = bp + `
+	bp := `
+		java_library {
+			name: "some-updatable-apex-lib",
+			srcs: ["a.java"],
+			sdk_version: "current",
+			apex_available: [
+				"some-updatable-apex",
+			],
+		}
+
+		java_library {
+			name: "some-non-updatable-apex-lib",
+			srcs: ["a.java"],
+			apex_available: [
+				"some-non-updatable-apex",
+			],
+		}
+
+		java_library {
+			name: "some-platform-lib",
+			srcs: ["a.java"],
+			sdk_version: "current",
+			installable: true,
+		}
+
+		java_library {
+			name: "some-art-lib",
+			srcs: ["a.java"],
+			sdk_version: "current",
+			apex_available: [
+				"com.android.art.something",
+			],
+			hostdex: true,
+		}
+
+		apex {
+			name: "some-updatable-apex",
+			key: "some-updatable-apex.key",
+			java_libs: ["some-updatable-apex-lib"],
+			updatable: true,
+			min_sdk_version: "current",
+		}
+
+		apex {
+			name: "some-non-updatable-apex",
+			key: "some-non-updatable-apex.key",
+			java_libs: ["some-non-updatable-apex-lib"],
+		}
+
+		apex_key {
+			name: "some-updatable-apex.key",
+		}
+
+		apex_key {
+			name: "some-non-updatable-apex.key",
+		}
+
+		apex {
+			name: "com.android.art.something",
+			key: "com.android.art.something.key",
+			java_libs: ["some-art-lib"],
+			updatable: true,
+			min_sdk_version: "current",
+		}
+
+		apex_key {
+			name: "com.android.art.something.key",
+		}
+
 		filegroup {
 			name: "some-updatable-apex-file_contexts",
 			srcs: [
@@ -4596,145 +4790,86 @@
 }
 
 func TestNoUpdatableJarsInBootImage(t *testing.T) {
-	bp := `
-		java_library {
-			name: "some-updatable-apex-lib",
-			srcs: ["a.java"],
-			sdk_version: "current",
-			apex_available: [
-				"some-updatable-apex",
-			],
-		}
-
-		java_library {
-			name: "some-non-updatable-apex-lib",
-			srcs: ["a.java"],
-			apex_available: [
-				"some-non-updatable-apex",
-			],
-		}
-
-		java_library {
-			name: "some-platform-lib",
-			srcs: ["a.java"],
-			sdk_version: "current",
-			installable: true,
-		}
-
-		java_library {
-			name: "some-art-lib",
-			srcs: ["a.java"],
-			sdk_version: "current",
-			apex_available: [
-				"com.android.art.something",
-			],
-			hostdex: true,
-		}
-
-		apex {
-			name: "some-updatable-apex",
-			key: "some-updatable-apex.key",
-			java_libs: ["some-updatable-apex-lib"],
-			updatable: true,
-			min_sdk_version: "current",
-		}
-
-		apex {
-			name: "some-non-updatable-apex",
-			key: "some-non-updatable-apex.key",
-			java_libs: ["some-non-updatable-apex-lib"],
-		}
-
-		apex_key {
-			name: "some-updatable-apex.key",
-		}
-
-		apex_key {
-			name: "some-non-updatable-apex.key",
-		}
-
-		apex {
-			name: "com.android.art.something",
-			key: "com.android.art.something.key",
-			java_libs: ["some-art-lib"],
-			updatable: true,
-			min_sdk_version: "current",
-		}
-
-		apex_key {
-			name: "com.android.art.something.key",
-		}
-	`
 
 	var error string
 	var transform func(*dexpreopt.GlobalConfig)
 
-	// updatable jar from ART apex in the ART boot image => ok
-	transform = func(config *dexpreopt.GlobalConfig) {
-		config.ArtApexJars = []string{"com.android.art.something:some-art-lib"}
-	}
-	testNoUpdatableJarsInBootImage(t, "", bp, transform)
+	t.Run("updatable jar from ART apex in the ART boot image => ok", func(t *testing.T) {
+		transform = func(config *dexpreopt.GlobalConfig) {
+			config.ArtApexJars = []string{"com.android.art.something:some-art-lib"}
+		}
+		testNoUpdatableJarsInBootImage(t, "", transform)
+	})
 
-	// updatable jar from ART apex in the framework boot image => error
-	error = "module 'some-art-lib' from updatable apex 'com.android.art.something' is not allowed in the framework boot image"
-	transform = func(config *dexpreopt.GlobalConfig) {
-		config.BootJars = []string{"com.android.art.something:some-art-lib"}
-	}
-	testNoUpdatableJarsInBootImage(t, error, bp, transform)
+	t.Run("updatable jar from ART apex in the framework boot image => error", func(t *testing.T) {
+		error = "module 'some-art-lib' from updatable apex 'com.android.art.something' is not allowed in the framework boot image"
+		transform = func(config *dexpreopt.GlobalConfig) {
+			config.BootJars = []string{"com.android.art.something:some-art-lib"}
+		}
+		testNoUpdatableJarsInBootImage(t, error, transform)
+	})
 
-	// updatable jar from some other apex in the ART boot image => error
-	error = "module 'some-updatable-apex-lib' from updatable apex 'some-updatable-apex' is not allowed in the ART boot image"
-	transform = func(config *dexpreopt.GlobalConfig) {
-		config.ArtApexJars = []string{"some-updatable-apex:some-updatable-apex-lib"}
-	}
-	testNoUpdatableJarsInBootImage(t, error, bp, transform)
+	t.Run("updatable jar from some other apex in the ART boot image => error", func(t *testing.T) {
+		error = "module 'some-updatable-apex-lib' from updatable apex 'some-updatable-apex' is not allowed in the ART boot image"
+		transform = func(config *dexpreopt.GlobalConfig) {
+			config.ArtApexJars = []string{"some-updatable-apex:some-updatable-apex-lib"}
+		}
+		testNoUpdatableJarsInBootImage(t, error, transform)
+	})
 
-	// non-updatable jar from some other apex in the ART boot image => error
-	error = "module 'some-non-updatable-apex-lib' is not allowed in the ART boot image"
-	transform = func(config *dexpreopt.GlobalConfig) {
-		config.ArtApexJars = []string{"some-non-updatable-apex:some-non-updatable-apex-lib"}
-	}
-	testNoUpdatableJarsInBootImage(t, error, bp, transform)
+	t.Run("non-updatable jar from some other apex in the ART boot image => error", func(t *testing.T) {
+		error = "module 'some-non-updatable-apex-lib' is not allowed in the ART boot image"
+		transform = func(config *dexpreopt.GlobalConfig) {
+			config.ArtApexJars = []string{"some-non-updatable-apex:some-non-updatable-apex-lib"}
+		}
+		testNoUpdatableJarsInBootImage(t, error, transform)
+	})
 
-	// updatable jar from some other apex in the framework boot image => error
-	error = "module 'some-updatable-apex-lib' from updatable apex 'some-updatable-apex' is not allowed in the framework boot image"
-	transform = func(config *dexpreopt.GlobalConfig) {
-		config.BootJars = []string{"some-updatable-apex:some-updatable-apex-lib"}
-	}
-	testNoUpdatableJarsInBootImage(t, error, bp, transform)
+	t.Run("updatable jar from some other apex in the framework boot image => error", func(t *testing.T) {
+		error = "module 'some-updatable-apex-lib' from updatable apex 'some-updatable-apex' is not allowed in the framework boot image"
+		transform = func(config *dexpreopt.GlobalConfig) {
+			config.BootJars = []string{"some-updatable-apex:some-updatable-apex-lib"}
+		}
+		testNoUpdatableJarsInBootImage(t, error, transform)
+	})
 
-	// non-updatable jar from some other apex in the framework boot image => ok
-	transform = func(config *dexpreopt.GlobalConfig) {
-		config.BootJars = []string{"some-non-updatable-apex:some-non-updatable-apex-lib"}
-	}
-	testNoUpdatableJarsInBootImage(t, "", bp, transform)
+	t.Run("non-updatable jar from some other apex in the framework boot image => ok", func(t *testing.T) {
+		transform = func(config *dexpreopt.GlobalConfig) {
+			config.BootJars = []string{"some-non-updatable-apex:some-non-updatable-apex-lib"}
+		}
+		testNoUpdatableJarsInBootImage(t, "", transform)
+	})
 
-	// nonexistent jar in the ART boot image => error
-	error = "failed to find a dex jar path for module 'nonexistent'"
-	transform = func(config *dexpreopt.GlobalConfig) {
-		config.ArtApexJars = []string{"platform:nonexistent"}
-	}
-	testNoUpdatableJarsInBootImage(t, error, bp, transform)
+	t.Run("nonexistent jar in the ART boot image => error", func(t *testing.T) {
+		error = "failed to find a dex jar path for module 'nonexistent'"
+		transform = func(config *dexpreopt.GlobalConfig) {
+			config.ArtApexJars = []string{"platform:nonexistent"}
+		}
+		testNoUpdatableJarsInBootImage(t, error, transform)
+	})
 
-	// nonexistent jar in the framework boot image => error
-	error = "failed to find a dex jar path for module 'nonexistent'"
-	transform = func(config *dexpreopt.GlobalConfig) {
-		config.BootJars = []string{"platform:nonexistent"}
-	}
-	testNoUpdatableJarsInBootImage(t, error, bp, transform)
+	t.Run("nonexistent jar in the framework boot image => error", func(t *testing.T) {
+		error = "failed to find a dex jar path for module 'nonexistent'"
+		transform = func(config *dexpreopt.GlobalConfig) {
+			config.BootJars = []string{"platform:nonexistent"}
+		}
+		testNoUpdatableJarsInBootImage(t, error, transform)
+	})
 
-	// platform jar in the ART boot image => error
-	error = "module 'some-platform-lib' is not allowed in the ART boot image"
-	transform = func(config *dexpreopt.GlobalConfig) {
-		config.ArtApexJars = []string{"platform:some-platform-lib"}
-	}
-	testNoUpdatableJarsInBootImage(t, error, bp, transform)
+	t.Run("platform jar in the ART boot image => error", func(t *testing.T) {
+		error = "module 'some-platform-lib' is not allowed in the ART boot image"
+		transform = func(config *dexpreopt.GlobalConfig) {
+			config.ArtApexJars = []string{"platform:some-platform-lib"}
+		}
+		testNoUpdatableJarsInBootImage(t, error, transform)
+	})
 
-	// platform jar in the framework boot image => ok
-	transform = func(config *dexpreopt.GlobalConfig) {
-		config.BootJars = []string{"platform:some-platform-lib"}
-	}
-	testNoUpdatableJarsInBootImage(t, "", bp, transform)
+	t.Run("platform jar in the framework boot image => ok", func(t *testing.T) {
+		transform = func(config *dexpreopt.GlobalConfig) {
+			config.BootJars = []string{"platform:some-platform-lib"}
+		}
+		testNoUpdatableJarsInBootImage(t, "", transform)
+	})
 }
 
 func TestTestFor(t *testing.T) {
@@ -4789,6 +4924,84 @@
 	ensureNotContains(t, ldFlags, "mylib/android_arm64_armv8-a_shared_1/mylib.so")
 }
 
+// TODO(jungjw): Move this to proptools
+func intPtr(i int) *int {
+	return &i
+}
+
+func TestApexSet(t *testing.T) {
+	ctx, config := testApex(t, `
+		apex_set {
+			name: "myapex",
+			set: "myapex.apks",
+			filename: "foo_v2.apex",
+			overrides: ["foo"],
+		}
+	`, func(fs map[string][]byte, config android.Config) {
+		config.TestProductVariables.Platform_sdk_version = intPtr(30)
+		config.TestProductVariables.DeviceArch = proptools.StringPtr("arm")
+		config.TestProductVariables.DeviceSecondaryArch = proptools.StringPtr("arm64")
+	})
+
+	m := ctx.ModuleForTests("myapex", "android_common")
+
+	// Check extract_apks tool parameters.
+	extractedApex := m.Output(buildDir + "/.intermediates/myapex/android_common/foo_v2.apex")
+	actual := extractedApex.Args["abis"]
+	expected := "ARMEABI_V7A,ARM64_V8A"
+	if actual != expected {
+		t.Errorf("Unexpected abis parameter - expected %q vs actual %q", expected, actual)
+	}
+	actual = extractedApex.Args["sdk-version"]
+	expected = "30"
+	if actual != expected {
+		t.Errorf("Unexpected abis parameter - expected %q vs actual %q", expected, actual)
+	}
+
+	a := m.Module().(*ApexSet)
+	expectedOverrides := []string{"foo"}
+	actualOverrides := android.AndroidMkEntriesForTest(t, config, "", a)[0].EntryMap["LOCAL_OVERRIDES_MODULES"]
+	if !reflect.DeepEqual(actualOverrides, expectedOverrides) {
+		t.Errorf("Incorrect LOCAL_OVERRIDES_MODULES - expected %q vs actual %q", expectedOverrides, actualOverrides)
+	}
+}
+
+func TestNoStaticLinkingToStubsLib(t *testing.T) {
+	testApexError(t, `.*required by "mylib" is a native library providing stub.*`, `
+		apex {
+			name: "myapex",
+			key: "myapex.key",
+			native_shared_libs: ["mylib"],
+		}
+
+		apex_key {
+			name: "myapex.key",
+			public_key: "testkey.avbpubkey",
+			private_key: "testkey.pem",
+		}
+
+		cc_library {
+			name: "mylib",
+			srcs: ["mylib.cpp"],
+			static_libs: ["otherlib"],
+			system_shared_libs: [],
+			stl: "none",
+			apex_available: [ "myapex" ],
+		}
+
+		cc_library {
+			name: "otherlib",
+			srcs: ["mylib.cpp"],
+			system_shared_libs: [],
+			stl: "none",
+			stubs: {
+				versions: ["1", "2", "3"],
+			},
+			apex_available: [ "myapex" ],
+		}
+	`)
+}
+
 func TestMain(m *testing.M) {
 	run := func() int {
 		setUp()
diff --git a/apex/builder.go b/apex/builder.go
index 47ae501..3d0e9b2 100644
--- a/apex/builder.go
+++ b/apex/builder.go
@@ -61,6 +61,7 @@
 	pctx.HostBinToolVariable("zipalign", "zipalign")
 	pctx.HostBinToolVariable("jsonmodify", "jsonmodify")
 	pctx.HostBinToolVariable("conv_apex_manifest", "conv_apex_manifest")
+	pctx.HostBinToolVariable("extract_apks", "extract_apks")
 }
 
 var (
diff --git a/apex/prebuilt.go b/apex/prebuilt.go
index d089c28..03266c5 100644
--- a/apex/prebuilt.go
+++ b/apex/prebuilt.go
@@ -16,13 +16,29 @@
 
 import (
 	"fmt"
+	"strconv"
 	"strings"
 
 	"android/soong/android"
+	"android/soong/java"
+	"github.com/google/blueprint"
 
 	"github.com/google/blueprint/proptools"
 )
 
+var (
+	extractMatchingApex = pctx.StaticRule(
+		"extractMatchingApex",
+		blueprint.RuleParams{
+			Command: `rm -rf "$out" && ` +
+				`${extract_apks} -o "${out}" -allow-prereleased=${allow-prereleased} ` +
+				`-sdk-version=${sdk-version} -abis=${abis} -screen-densities=all -extract-single ` +
+				`${in}`,
+			CommandDeps: []string{"${extract_apks}"},
+		},
+		"abis", "allow-prereleased", "sdk-version")
+)
+
 type Prebuilt struct {
 	android.ModuleBase
 	prebuilt android.Prebuilt
@@ -208,3 +224,117 @@
 		},
 	}}
 }
+
+type ApexSet struct {
+	android.ModuleBase
+	prebuilt android.Prebuilt
+
+	properties ApexSetProperties
+
+	installDir      android.InstallPath
+	installFilename string
+	outputApex      android.WritablePath
+
+	// list of commands to create symlinks for backward compatibility.
+	// these commands will be attached as LOCAL_POST_INSTALL_CMD
+	compatSymlinks []string
+}
+
+type ApexSetProperties struct {
+	// the .apks file path that contains prebuilt apex files to be extracted.
+	Set *string
+
+	// whether the extracted apex file installable.
+	Installable *bool
+
+	// optional name for the installed apex. If unspecified, name of the
+	// module is used as the file name
+	Filename *string
+
+	// names of modules to be overridden. Listed modules can only be other binaries
+	// (in Make or Soong).
+	// This does not completely prevent installation of the overridden binaries, but if both
+	// binaries would be installed by default (in PRODUCT_PACKAGES) the other binary will be removed
+	// from PRODUCT_PACKAGES.
+	Overrides []string
+
+	// apexes in this set use prerelease SDK version
+	Prerelease *bool
+}
+
+func (a *ApexSet) installable() bool {
+	return a.properties.Installable == nil || proptools.Bool(a.properties.Installable)
+}
+
+func (a *ApexSet) InstallFilename() string {
+	return proptools.StringDefault(a.properties.Filename, a.BaseModuleName()+imageApexSuffix)
+}
+
+func (a *ApexSet) Prebuilt() *android.Prebuilt {
+	return &a.prebuilt
+}
+
+func (a *ApexSet) Name() string {
+	return a.prebuilt.Name(a.ModuleBase.Name())
+}
+
+// prebuilt_apex imports an `.apex` file into the build graph as if it was built with apex.
+func apexSetFactory() android.Module {
+	module := &ApexSet{}
+	module.AddProperties(&module.properties)
+	android.InitSingleSourcePrebuiltModule(module, &module.properties, "Set")
+	android.InitAndroidMultiTargetsArchModule(module, android.DeviceSupported, android.MultilibCommon)
+	return module
+}
+
+func (a *ApexSet) GenerateAndroidBuildActions(ctx android.ModuleContext) {
+	a.installFilename = a.InstallFilename()
+	if !strings.HasSuffix(a.installFilename, imageApexSuffix) {
+		ctx.ModuleErrorf("filename should end in %s for apex_set", imageApexSuffix)
+	}
+
+	apexSet := a.prebuilt.SingleSourcePath(ctx)
+	a.outputApex = android.PathForModuleOut(ctx, a.installFilename)
+	ctx.Build(pctx,
+		android.BuildParams{
+			Rule:        extractMatchingApex,
+			Description: "Extract an apex from an apex set",
+			Inputs:      android.Paths{apexSet},
+			Output:      a.outputApex,
+			Args: map[string]string{
+				"abis":              strings.Join(java.SupportedAbis(ctx), ","),
+				"allow-prereleased": strconv.FormatBool(proptools.Bool(a.properties.Prerelease)),
+				"sdk-version":       ctx.Config().PlatformSdkVersion(),
+			},
+		})
+	a.installDir = android.PathForModuleInstall(ctx, "apex")
+	if a.installable() {
+		ctx.InstallFile(a.installDir, a.installFilename, a.outputApex)
+	}
+
+	// in case that apex_set replaces source apex (using prefer: prop)
+	a.compatSymlinks = makeCompatSymlinks(a.BaseModuleName(), ctx)
+	// or that apex_set overrides other apexes (using overrides: prop)
+	for _, overridden := range a.properties.Overrides {
+		a.compatSymlinks = append(a.compatSymlinks, makeCompatSymlinks(overridden, ctx)...)
+	}
+}
+
+func (a *ApexSet) AndroidMkEntries() []android.AndroidMkEntries {
+	return []android.AndroidMkEntries{android.AndroidMkEntries{
+		Class:      "ETC",
+		OutputFile: android.OptionalPathForPath(a.outputApex),
+		Include:    "$(BUILD_PREBUILT)",
+		ExtraEntries: []android.AndroidMkExtraEntriesFunc{
+			func(entries *android.AndroidMkEntries) {
+				entries.SetString("LOCAL_MODULE_PATH", a.installDir.ToMakePath().String())
+				entries.SetString("LOCAL_MODULE_STEM", a.installFilename)
+				entries.SetBoolIfTrue("LOCAL_UNINSTALLABLE_MODULE", !a.installable())
+				entries.AddStrings("LOCAL_OVERRIDES_MODULES", a.properties.Overrides...)
+				if len(a.compatSymlinks) > 0 {
+					entries.SetString("LOCAL_POST_INSTALL_CMD", strings.Join(a.compatSymlinks, " && "))
+				}
+			},
+		},
+	}}
+}
diff --git a/cc/builder.go b/cc/builder.go
index 41cc0c7..e571e5a 100644
--- a/cc/builder.go
+++ b/cc/builder.go
@@ -99,6 +99,15 @@
 		},
 		"arCmd", "arFlags")
 
+	arWithLibs = pctx.AndroidStaticRule("arWithLibs",
+		blueprint.RuleParams{
+			Command:        "rm -f ${out} && $arCmd $arObjFlags $out @${out}.rsp && $arCmd $arLibFlags $out $arLibs",
+			CommandDeps:    []string{"$arCmd"},
+			Rspfile:        "${out}.rsp",
+			RspfileContent: "${arObjs}",
+		},
+		"arCmd", "arObjFlags", "arObjs", "arLibFlags", "arLibs")
+
 	darwinStrip = pctx.AndroidStaticRule("darwinStrip",
 		blueprint.RuleParams{
 			Command:     "${config.MacStripPath} -u -r -o $out $in",
@@ -609,26 +618,45 @@
 }
 
 // Generate a rule for compiling multiple .o files to a static library (.a)
-func TransformObjToStaticLib(ctx android.ModuleContext, objFiles android.Paths,
+func TransformObjToStaticLib(ctx android.ModuleContext,
+	objFiles android.Paths, wholeStaticLibs android.Paths,
 	flags builderFlags, outputFile android.ModuleOutPath, deps android.Paths) {
 
 	arCmd := "${config.ClangBin}/llvm-ar"
-	arFlags := "crsPD"
+	arFlags := ""
 	if !ctx.Darwin() {
 		arFlags += " -format=gnu"
 	}
 
-	ctx.Build(pctx, android.BuildParams{
-		Rule:        ar,
-		Description: "static link " + outputFile.Base(),
-		Output:      outputFile,
-		Inputs:      objFiles,
-		Implicits:   deps,
-		Args: map[string]string{
-			"arFlags": arFlags,
-			"arCmd":   arCmd,
-		},
-	})
+	if len(wholeStaticLibs) == 0 {
+		ctx.Build(pctx, android.BuildParams{
+			Rule:        ar,
+			Description: "static link " + outputFile.Base(),
+			Output:      outputFile,
+			Inputs:      objFiles,
+			Implicits:   deps,
+			Args: map[string]string{
+				"arFlags": "crsPD" + arFlags,
+				"arCmd":   arCmd,
+			},
+		})
+
+	} else {
+		ctx.Build(pctx, android.BuildParams{
+			Rule:        arWithLibs,
+			Description: "static link " + outputFile.Base(),
+			Output:      outputFile,
+			Inputs:      append(objFiles, wholeStaticLibs...),
+			Implicits:   deps,
+			Args: map[string]string{
+				"arCmd":      arCmd,
+				"arObjFlags": "crsPD" + arFlags,
+				"arObjs":     strings.Join(objFiles.Strings(), " "),
+				"arLibFlags": "cqsL" + arFlags,
+				"arLibs":     strings.Join(wholeStaticLibs.Strings(), " "),
+			},
+		})
+	}
 }
 
 // Generate a rule for compiling multiple .o files, plus static libraries, whole static libraries,
diff --git a/cc/cc.go b/cc/cc.go
index fbd5bdf..94512d5 100644
--- a/cc/cc.go
+++ b/cc/cc.go
@@ -124,10 +124,16 @@
 	StaticLibs, LateStaticLibs, WholeStaticLibs android.Paths
 
 	// Paths to .o files
-	Objs               Objects
+	Objs Objects
+	// Paths to .o files in dependencies that provide them. Note that these lists
+	// aren't complete since prebuilt modules don't provide the .o files.
 	StaticLibObjs      Objects
 	WholeStaticLibObjs Objects
 
+	// Paths to .a files in prebuilts. Complements WholeStaticLibObjs to contain
+	// the libs from all whole_static_lib dependencies.
+	WholeStaticLibsFromPrebuilts android.Paths
+
 	// Paths to generated source files
 	GeneratedSources android.Paths
 	GeneratedHeaders android.Paths
@@ -1068,7 +1074,7 @@
 
 func InstallToBootstrap(name string, config android.Config) bool {
 	if name == "libclang_rt.hwasan-aarch64-android" {
-		return inList("hwaddress", config.SanitizeDevice())
+		return true
 	}
 	return isBionic(name)
 }
@@ -2482,7 +2488,11 @@
 					}
 					ctx.AddMissingDependencies(missingDeps)
 				}
-				depPaths.WholeStaticLibObjs = depPaths.WholeStaticLibObjs.Append(staticLib.objs())
+				if _, ok := ccWholeStaticLib.linker.(prebuiltLinkerInterface); ok {
+					depPaths.WholeStaticLibsFromPrebuilts = append(depPaths.WholeStaticLibsFromPrebuilts, linkFile.Path())
+				} else {
+					depPaths.WholeStaticLibObjs = depPaths.WholeStaticLibObjs.Append(staticLib.objs())
+				}
 			} else {
 				ctx.ModuleErrorf(
 					"non-cc.Modules cannot be included as whole static libraries.", depName)
@@ -2871,6 +2881,9 @@
 				return false
 			}
 		}
+	} else if ctx.OtherModuleDependencyTag(dep) == llndkImplDep {
+		// We don't track beyond LLNDK
+		return false
 	}
 	return true
 }
diff --git a/cc/coverage.go b/cc/coverage.go
index cc9a1ad..f885fcb 100644
--- a/cc/coverage.go
+++ b/cc/coverage.go
@@ -92,7 +92,7 @@
 			// flags that the module may use.
 			flags.Local.CFlags = append(flags.Local.CFlags, "-Wno-frame-larger-than=", "-O0")
 		} else if clangCoverage {
-			flags.Local.CommonFlags = append(flags.Local.CommonFlags, "-fprofile-instr-generate", "-fcoverage-mapping")
+			flags.Local.CommonFlags = append(flags.Local.CommonFlags, "-fprofile-instr-generate", "-fcoverage-mapping", "-Wno-pass-failed")
 		}
 	}
 
diff --git a/cc/library.go b/cc/library.go
index ecea2ea..47485ce 100644
--- a/cc/library.go
+++ b/cc/library.go
@@ -874,7 +874,7 @@
 		}
 	}
 
-	TransformObjToStaticLib(ctx, library.objects.objFiles, builderFlags, outputFile, objs.tidyFiles)
+	TransformObjToStaticLib(ctx, library.objects.objFiles, deps.WholeStaticLibsFromPrebuilts, builderFlags, outputFile, objs.tidyFiles)
 
 	library.coverageOutputFile = TransformCoverageFilesToZip(ctx, library.objects, ctx.ModuleName())
 
diff --git a/cc/sanitize.go b/cc/sanitize.go
index 3412c9b..aaaf694 100644
--- a/cc/sanitize.go
+++ b/cc/sanitize.go
@@ -989,6 +989,7 @@
 	android.Module
 	IsSanitizerEnabled(ctx android.BaseModuleContext, sanitizerName string) bool
 	EnableSanitizer(sanitizerName string)
+	AddSanitizerDependencies(ctx android.BottomUpMutatorContext, sanitizerName string)
 }
 
 // Create sanitized variants for modules that need them
@@ -1075,6 +1076,7 @@
 			c.sanitize.Properties.SanitizeDep = false
 		} else if sanitizeable, ok := mctx.Module().(Sanitizeable); ok && sanitizeable.IsSanitizerEnabled(mctx, t.name()) {
 			// APEX modules fall here
+			sanitizeable.AddSanitizerDependencies(mctx, t.name())
 			mctx.CreateVariations(t.variationName())
 		}
 	}
diff --git a/cc/vndk.go b/cc/vndk.go
index dbe1f3b..e5e4533 100644
--- a/cc/vndk.go
+++ b/cc/vndk.go
@@ -309,7 +309,13 @@
 		panic(err)
 	}
 
-	if m.HasStubsVariants() {
+	if m.HasStubsVariants() && name != "libz" {
+		// b/155456180 libz is the ONLY exception here. We don't want to make
+		// libz an LLNDK library because we in general can't guarantee that
+		// libz will behave consistently especially about the compression.
+		// i.e. the compressed output might be different across releases.
+		// As the library is an external one, it's risky to keep the compatibility
+		// promise if it becomes an LLNDK.
 		mctx.PropertyErrorf("vndk.enabled", "This library provides stubs. Shouldn't be VNDK. Consider making it as LLNDK")
 	}
 
diff --git a/cmd/extract_apks/main.go b/cmd/extract_apks/main.go
index 4a146da..e9a850e 100644
--- a/cmd/extract_apks/main.go
+++ b/cmd/extract_apks/main.go
@@ -21,6 +21,7 @@
 	"fmt"
 	"io"
 	"log"
+	"math"
 	"os"
 	"regexp"
 	"strings"
@@ -32,9 +33,10 @@
 )
 
 type TargetConfig struct {
-	sdkVersion       int32
-	screenDpi        map[android_bundle_proto.ScreenDensity_DensityAlias]bool
-	abis             map[android_bundle_proto.Abi_AbiAlias]bool
+	sdkVersion int32
+	screenDpi  map[android_bundle_proto.ScreenDensity_DensityAlias]bool
+	// Map holding <ABI alias>:<its sequence number in the flag> info.
+	abis             map[android_bundle_proto.Abi_AbiAlias]int
 	allowPrereleased bool
 	stem             string
 }
@@ -88,6 +90,7 @@
 }
 
 // Matchers for selection criteria
+
 type abiTargetingMatcher struct {
 	*android_bundle_proto.AbiTargeting
 }
@@ -99,12 +102,28 @@
 	if _, ok := config.abis[android_bundle_proto.Abi_UNSPECIFIED_CPU_ARCHITECTURE]; ok {
 		return true
 	}
+	// Find the one that appears first in the abis flags.
+	abiIdx := math.MaxInt32
 	for _, v := range m.GetValue() {
-		if _, ok := config.abis[v.Alias]; ok {
-			return true
+		if i, ok := config.abis[v.Alias]; ok {
+			if i < abiIdx {
+				abiIdx = i
+			}
 		}
 	}
-	return false
+	if abiIdx == math.MaxInt32 {
+		return false
+	}
+	// See if any alternatives appear before the above one.
+	for _, a := range m.GetAlternatives() {
+		if i, ok := config.abis[a.Alias]; ok {
+			if i < abiIdx {
+				// There is a better alternative. Skip this one.
+				return false
+			}
+		}
+	}
+	return true
 }
 
 type apkDescriptionMatcher struct {
@@ -161,16 +180,55 @@
 			userCountriesTargetingMatcher{m.UserCountriesTargeting}.matches(config))
 }
 
+// A higher number means a higher priority.
+// This order must be kept identical to bundletool's.
+var multiAbiPriorities = map[android_bundle_proto.Abi_AbiAlias]int{
+	android_bundle_proto.Abi_ARMEABI:     1,
+	android_bundle_proto.Abi_ARMEABI_V7A: 2,
+	android_bundle_proto.Abi_ARM64_V8A:   3,
+	android_bundle_proto.Abi_X86:         4,
+	android_bundle_proto.Abi_X86_64:      5,
+	android_bundle_proto.Abi_MIPS:        6,
+	android_bundle_proto.Abi_MIPS64:      7,
+}
+
 type multiAbiTargetingMatcher struct {
 	*android_bundle_proto.MultiAbiTargeting
 }
 
-func (t multiAbiTargetingMatcher) matches(_ TargetConfig) bool {
+func (t multiAbiTargetingMatcher) matches(config TargetConfig) bool {
 	if t.MultiAbiTargeting == nil {
 		return true
 	}
-	log.Fatal("multiABI based selection is not implemented")
-	return false
+	if _, ok := config.abis[android_bundle_proto.Abi_UNSPECIFIED_CPU_ARCHITECTURE]; ok {
+		return true
+	}
+	// Find the one with the highest priority.
+	highestPriority := 0
+	for _, v := range t.GetValue() {
+		for _, a := range v.GetAbi() {
+			if _, ok := config.abis[a.Alias]; ok {
+				if highestPriority < multiAbiPriorities[a.Alias] {
+					highestPriority = multiAbiPriorities[a.Alias]
+				}
+			}
+		}
+	}
+	if highestPriority == 0 {
+		return false
+	}
+	// See if there are any matching alternatives with a higher priority.
+	for _, v := range t.GetAlternatives() {
+		for _, a := range v.GetAbi() {
+			if _, ok := config.abis[a.Alias]; ok {
+				if highestPriority < multiAbiPriorities[a.Alias] {
+					// There's a better one. Skip this one.
+					return false
+				}
+			}
+		}
+	}
+	return true
 }
 
 type screenDensityTargetingMatcher struct {
@@ -316,6 +374,10 @@
 			regexp.MustCompile(`^.*/` + selected.moduleName + `(-.*\.apk)$`),
 			config.stem + `$1`,
 		},
+		{
+			regexp.MustCompile(`^universal\.apk$`),
+			config.stem + ".apk",
+		},
 	}
 	renamer := func(path string) (string, bool) {
 		for _, rr := range renameRules {
@@ -349,13 +411,28 @@
 	return nil
 }
 
+func (apkSet *ApkSet) extractAndCopySingle(selected SelectionResult, outFile *os.File) error {
+	if len(selected.entries) != 1 {
+		return fmt.Errorf("Too many matching entries for extract-single:\n%v", selected.entries)
+	}
+	apk, ok := apkSet.entries[selected.entries[0]]
+	if !ok {
+		return fmt.Errorf("Couldn't find apk path %s", selected.entries[0])
+	}
+	inputReader, _ := apk.Open()
+	_, err := io.Copy(outFile, inputReader)
+	return err
+}
+
 // Arguments parsing
 var (
-	outputZip    = flag.String("o", "", "output zip containing extracted entries")
+	outputFile   = flag.String("o", "", "output file containing extracted entries")
 	targetConfig = TargetConfig{
 		screenDpi: map[android_bundle_proto.ScreenDensity_DensityAlias]bool{},
-		abis:      map[android_bundle_proto.Abi_AbiAlias]bool{},
+		abis:      map[android_bundle_proto.Abi_AbiAlias]int{},
 	}
+	extractSingle = flag.Bool("extract-single", false,
+		"extract a single target and output it uncompressed. only available for standalone apks and apexes.")
 )
 
 // Parse abi values
@@ -368,19 +445,12 @@
 }
 
 func (a abiFlagValue) Set(abiList string) error {
-	if abiList == "none" {
-		return nil
-	}
-	if abiList == "all" {
-		targetConfig.abis[android_bundle_proto.Abi_UNSPECIFIED_CPU_ARCHITECTURE] = true
-		return nil
-	}
-	for _, abi := range strings.Split(abiList, ",") {
+	for i, abi := range strings.Split(abiList, ",") {
 		v, ok := android_bundle_proto.Abi_AbiAlias_value[abi]
 		if !ok {
 			return fmt.Errorf("bad ABI value: %q", abi)
 		}
-		targetConfig.abis[android_bundle_proto.Abi_AbiAlias(v)] = true
+		targetConfig.abis[android_bundle_proto.Abi_AbiAlias(v)] = i
 	}
 	return nil
 }
@@ -414,20 +484,21 @@
 
 func processArgs() {
 	flag.Usage = func() {
-		fmt.Fprintln(os.Stderr, `usage: extract_apks -o <output-zip> -sdk-version value -abis value -screen-densities value  <APK set>`)
+		fmt.Fprintln(os.Stderr, `usage: extract_apks -o <output-file> -sdk-version value -abis value `+
+			`-screen-densities value {-stem value | -extract-single} [-allow-prereleased] <APK set>`)
 		flag.PrintDefaults()
 		os.Exit(2)
 	}
 	version := flag.Uint("sdk-version", 0, "SDK version")
 	flag.Var(abiFlagValue{&targetConfig}, "abis",
-		"'all' or comma-separated ABIs list of ARMEABI ARMEABI_V7A ARM64_V8A X86 X86_64 MIPS MIPS64")
+		"comma-separated ABIs list of ARMEABI ARMEABI_V7A ARM64_V8A X86 X86_64 MIPS MIPS64")
 	flag.Var(screenDensityFlagValue{&targetConfig}, "screen-densities",
 		"'all' or comma-separated list of screen density names (NODPI LDPI MDPI TVDPI HDPI XHDPI XXHDPI XXXHDPI)")
 	flag.BoolVar(&targetConfig.allowPrereleased, "allow-prereleased", false,
 		"allow prereleased")
-	flag.StringVar(&targetConfig.stem, "stem", "", "output entries base name")
+	flag.StringVar(&targetConfig.stem, "stem", "", "output entries base name in the output zip file")
 	flag.Parse()
-	if (*outputZip == "") || len(flag.Args()) != 1 || *version == 0 || targetConfig.stem == "" {
+	if (*outputFile == "") || len(flag.Args()) != 1 || *version == 0 || (targetConfig.stem == "" && !*extractSingle) {
 		flag.Usage()
 	}
 	targetConfig.sdkVersion = int32(*version)
@@ -450,18 +521,24 @@
 		log.Fatalf("there are no entries for the target configuration: %#v", targetConfig)
 	}
 
-	outFile, err := os.Create(*outputZip)
+	outFile, err := os.Create(*outputFile)
 	if err != nil {
 		log.Fatal(err)
 	}
 	defer outFile.Close()
-	writer := zip.NewWriter(outFile)
-	defer func() {
-		if err := writer.Close(); err != nil {
-			log.Fatal(err)
-		}
-	}()
-	if err = apkSet.writeApks(sel, targetConfig, writer); err != nil {
+
+	if *extractSingle {
+		err = apkSet.extractAndCopySingle(sel, outFile)
+	} else {
+		writer := zip.NewWriter(outFile)
+		defer func() {
+			if err := writer.Close(); err != nil {
+				log.Fatal(err)
+			}
+		}()
+		err = apkSet.writeApks(sel, targetConfig, writer)
+	}
+	if err != nil {
 		log.Fatal(err)
 	}
 }
diff --git a/cmd/extract_apks/main_test.go b/cmd/extract_apks/main_test.go
index 1d7726b..bdd4bec 100644
--- a/cmd/extract_apks/main_test.go
+++ b/cmd/extract_apks/main_test.go
@@ -24,31 +24,31 @@
 	"android/soong/third_party/zip"
 )
 
-type TestConfigDesc struct {
+type testConfigDesc struct {
 	name         string
 	targetConfig TargetConfig
 	expected     SelectionResult
 }
 
-type TestDesc struct {
+type testDesc struct {
 	protoText string
-	configs   []TestConfigDesc
+	configs   []testConfigDesc
 }
 
-var (
-	testCases = []TestDesc{
+func TestSelectApks_ApkSet(t *testing.T) {
+	testCases := []testDesc{
 		{
 			protoText: `
 variant {
   targeting {
-    sdk_version_targeting { 
+    sdk_version_targeting {
       value { min { value: 29 } } } }
   apk_set {
-    module_metadata { 
+    module_metadata {
       name: "base" targeting {} delivery_type: INSTALL_TIME }
     apk_description {
       targeting {
-        screen_density_targeting { 
+        screen_density_targeting {
           value { density_alias: LDPI } }
         sdk_version_targeting {
           value { min { value: 21 } } } }
@@ -71,7 +71,10 @@
     apk_description {
       targeting {
         abi_targeting {
-	      value { alias: ARMEABI_V7A } }
+          value { alias: ARMEABI_V7A }
+          alternatives { alias: ARM64_V8A }
+          alternatives { alias: X86 }
+          alternatives { alias: X86_64 } }
         sdk_version_targeting {
           value { min { value: 21 } } } }
       path: "splits/base-armeabi_v7a.apk"
@@ -79,7 +82,10 @@
     apk_description {
       targeting {
         abi_targeting {
-          value { alias: ARM64_V8A } }
+          value { alias: ARM64_V8A }
+          alternatives { alias: ARMEABI_V7A }
+          alternatives { alias: X86 }
+          alternatives { alias: X86_64 } }
         sdk_version_targeting {
           value { min { value: 21 } } } }
       path: "splits/base-arm64_v8a.apk"
@@ -87,7 +93,10 @@
     apk_description {
       targeting {
         abi_targeting {
-          value { alias: X86 } }
+          value { alias: X86 }
+          alternatives { alias: ARMEABI_V7A }
+          alternatives { alias: ARM64_V8A }
+          alternatives { alias: X86_64 } }
         sdk_version_targeting {
           value { min { value: 21 } } } }
       path: "splits/base-x86.apk"
@@ -95,7 +104,10 @@
     apk_description {
       targeting {
         abi_targeting {
-          value { alias: X86_64 } }
+          value { alias: X86_64 }
+          alternatives { alias: ARMEABI_V7A }
+          alternatives { alias: ARM64_V8A }
+          alternatives { alias: X86 } }
         sdk_version_targeting {
           value { min { value: 21 } } } }
       path: "splits/base-x86_64.apk"
@@ -105,7 +117,7 @@
   version: "0.10.3" }
 
 `,
-			configs: []TestConfigDesc{
+			configs: []testConfigDesc{
 				{
 					name: "one",
 					targetConfig: TargetConfig{
@@ -113,9 +125,9 @@
 						screenDpi: map[bp.ScreenDensity_DensityAlias]bool{
 							bp.ScreenDensity_DENSITY_UNSPECIFIED: true,
 						},
-						abis: map[bp.Abi_AbiAlias]bool{
-							bp.Abi_ARMEABI_V7A: true,
-							bp.Abi_ARM64_V8A:   true,
+						abis: map[bp.Abi_AbiAlias]int{
+							bp.Abi_ARMEABI_V7A: 0,
+							bp.Abi_ARM64_V8A:   1,
 						},
 					},
 					expected: SelectionResult{
@@ -125,7 +137,6 @@
 							"splits/base-mdpi.apk",
 							"splits/base-master.apk",
 							"splits/base-armeabi_v7a.apk",
-							"splits/base-arm64_v8a.apk",
 						},
 					},
 				},
@@ -136,7 +147,7 @@
 						screenDpi: map[bp.ScreenDensity_DensityAlias]bool{
 							bp.ScreenDensity_LDPI: true,
 						},
-						abis: map[bp.Abi_AbiAlias]bool{},
+						abis: map[bp.Abi_AbiAlias]int{},
 					},
 					expected: SelectionResult{
 						"base",
@@ -153,23 +164,44 @@
 						screenDpi: map[bp.ScreenDensity_DensityAlias]bool{
 							bp.ScreenDensity_LDPI: true,
 						},
-						abis: map[bp.Abi_AbiAlias]bool{},
+						abis: map[bp.Abi_AbiAlias]int{},
 					},
 					expected: SelectionResult{
 						"",
 						nil,
 					},
 				},
+				{
+					name: "four",
+					targetConfig: TargetConfig{
+						sdkVersion: 29,
+						screenDpi: map[bp.ScreenDensity_DensityAlias]bool{
+							bp.ScreenDensity_MDPI: true,
+						},
+						abis: map[bp.Abi_AbiAlias]int{
+							bp.Abi_ARM64_V8A:   0,
+							bp.Abi_ARMEABI_V7A: 1,
+						},
+					},
+					expected: SelectionResult{
+						"base",
+						[]string{
+							"splits/base-mdpi.apk",
+							"splits/base-master.apk",
+							"splits/base-arm64_v8a.apk",
+						},
+					},
+				},
 			},
 		},
 		{
 			protoText: `
 variant {
   targeting {
-    sdk_version_targeting { 
+    sdk_version_targeting {
       value { min { value: 10000 } } } }
   apk_set {
-    module_metadata { 
+    module_metadata {
       name: "base" targeting {} delivery_type: INSTALL_TIME }
     apk_description {
       targeting {
@@ -177,13 +209,13 @@
           value { min { value: 21 } } } }
       path: "splits/base-master.apk"
       split_apk_metadata { is_master_split: true } } } }`,
-			configs: []TestConfigDesc{
+			configs: []testConfigDesc{
 				{
 					name: "Prerelease",
 					targetConfig: TargetConfig{
 						sdkVersion:       30,
 						screenDpi:        map[bp.ScreenDensity_DensityAlias]bool{},
-						abis:             map[bp.Abi_AbiAlias]bool{},
+						abis:             map[bp.Abi_AbiAlias]int{},
 						allowPrereleased: true,
 					},
 					expected: SelectionResult{
@@ -193,10 +225,185 @@
 				},
 			},
 		},
+		{
+			protoText: `
+variant {
+  targeting {
+    sdk_version_targeting {
+      value { min { value: 29 } } } }
+  apk_set {
+    module_metadata {
+      name: "base" targeting {} delivery_type: INSTALL_TIME }
+    apk_description {
+      targeting {}
+      path: "universal.apk"
+      standalone_apk_metadata { fused_module_name: "base" } } } }`,
+			configs: []testConfigDesc{
+				{
+					name:         "Universal",
+					targetConfig: TargetConfig{sdkVersion: 30},
+					expected: SelectionResult{
+						"base",
+						[]string{"universal.apk"},
+					},
+				},
+			},
+		},
 	}
-)
+	for _, testCase := range testCases {
+		var toc bp.BuildApksResult
+		if err := proto.UnmarshalText(testCase.protoText, &toc); err != nil {
+			t.Fatal(err)
+		}
+		for _, config := range testCase.configs {
+			actual := selectApks(&toc, config.targetConfig)
+			if !reflect.DeepEqual(config.expected, actual) {
+				t.Errorf("%s: expected %v, got %v", config.name, config.expected, actual)
+			}
+		}
+	}
+}
 
-func TestSelectApks(t *testing.T) {
+func TestSelectApks_ApexSet(t *testing.T) {
+	testCases := []testDesc{
+		{
+			protoText: `
+variant {
+  targeting {
+    sdk_version_targeting {
+      value { min { value: 29 } } } }
+  apk_set {
+    module_metadata {
+      name: "base" targeting {} delivery_type: INSTALL_TIME }
+    apk_description {
+      targeting {
+        multi_abi_targeting {
+          value { abi { alias: ARMEABI_V7A } }
+          alternatives { abi { alias: ARM64_V8A } }
+          alternatives { abi { alias: X86 } }
+          alternatives { abi { alias: X86_64 } } }
+        sdk_version_targeting {
+          value { min { value: 21 } } } }
+      path: "standalones/standalone-armeabi_v7a.apex"
+      apex_apk_metadata { } }
+    apk_description {
+      targeting {
+        multi_abi_targeting {
+          value { abi { alias: ARM64_V8A } }
+          alternatives { abi { alias: ARMEABI_V7A } }
+          alternatives { abi { alias: X86 } }
+          alternatives { abi { alias: X86_64 } } }
+        sdk_version_targeting {
+          value { min { value: 21 } } } }
+      path: "standalones/standalone-arm64_v8a.apex"
+      apex_apk_metadata { } }
+    apk_description {
+      targeting {
+        multi_abi_targeting {
+          value { abi { alias: X86 } }
+          alternatives { abi { alias: ARMEABI_V7A } }
+          alternatives { abi { alias: ARM64_V8A } }
+          alternatives { abi { alias: X86_64 } } }
+        sdk_version_targeting {
+          value { min { value: 21 } } } }
+      path: "standalones/standalone-x86.apex"
+      apex_apk_metadata { } }
+    apk_description {
+      targeting {
+        multi_abi_targeting {
+          value { abi { alias: X86_64 } }
+          alternatives { abi { alias: ARMEABI_V7A } }
+          alternatives { abi { alias: ARM64_V8A } }
+          alternatives { abi { alias: X86 } } }
+        sdk_version_targeting {
+          value { min { value: 21 } } } }
+      path: "standalones/standalone-x86_64.apex"
+      apex_apk_metadata { } } }
+}
+bundletool {
+  version: "0.10.3" }
+
+`,
+			configs: []testConfigDesc{
+				{
+					name: "order matches priorities",
+					targetConfig: TargetConfig{
+						sdkVersion: 29,
+						screenDpi: map[bp.ScreenDensity_DensityAlias]bool{
+							bp.ScreenDensity_DENSITY_UNSPECIFIED: true,
+						},
+						abis: map[bp.Abi_AbiAlias]int{
+							bp.Abi_ARM64_V8A:   0,
+							bp.Abi_ARMEABI_V7A: 1,
+						},
+					},
+					expected: SelectionResult{
+						"base",
+						[]string{
+							"standalones/standalone-arm64_v8a.apex",
+						},
+					},
+				},
+				{
+					name: "order doesn't match priorities",
+					targetConfig: TargetConfig{
+						sdkVersion: 29,
+						screenDpi: map[bp.ScreenDensity_DensityAlias]bool{
+							bp.ScreenDensity_DENSITY_UNSPECIFIED: true,
+						},
+						abis: map[bp.Abi_AbiAlias]int{
+							bp.Abi_ARMEABI_V7A: 0,
+							bp.Abi_ARM64_V8A:   1,
+						},
+					},
+					expected: SelectionResult{
+						"base",
+						[]string{
+							"standalones/standalone-arm64_v8a.apex",
+						},
+					},
+				},
+				{
+					name: "single choice",
+					targetConfig: TargetConfig{
+						sdkVersion: 29,
+						screenDpi: map[bp.ScreenDensity_DensityAlias]bool{
+							bp.ScreenDensity_DENSITY_UNSPECIFIED: true,
+						},
+						abis: map[bp.Abi_AbiAlias]int{
+							bp.Abi_ARMEABI_V7A: 0,
+						},
+					},
+					expected: SelectionResult{
+						"base",
+						[]string{
+							"standalones/standalone-armeabi_v7a.apex",
+						},
+					},
+				},
+				{
+					name: "cross platform",
+					targetConfig: TargetConfig{
+						sdkVersion: 29,
+						screenDpi: map[bp.ScreenDensity_DensityAlias]bool{
+							bp.ScreenDensity_DENSITY_UNSPECIFIED: true,
+						},
+						abis: map[bp.Abi_AbiAlias]int{
+							bp.Abi_ARM64_V8A: 0,
+							bp.Abi_MIPS64:    1,
+							bp.Abi_X86:       2,
+						},
+					},
+					expected: SelectionResult{
+						"base",
+						[]string{
+							"standalones/standalone-x86.apex",
+						},
+					},
+				},
+			},
+		},
+	}
 	for _, testCase := range testCases {
 		var toc bp.BuildApksResult
 		if err := proto.UnmarshalText(testCase.protoText, &toc); err != nil {
@@ -223,24 +430,48 @@
 	return nil
 }
 
-func TestWriteZip(t *testing.T) {
+type testCaseWriteZip struct {
+	name       string
+	moduleName string
+	stem       string
 	// what we write from what
-	expected := map[string]string{
-		"Foo.apk":       "splits/mybase-master.apk",
-		"Foo-xhdpi.apk": "splits/mybase-xhdpi.apk",
+	expected map[string]string
+}
+
+func TestWriteZip(t *testing.T) {
+	testCases := []testCaseWriteZip{
+		{
+			name:       "splits",
+			moduleName: "mybase",
+			stem:       "Foo",
+			expected: map[string]string{
+				"Foo.apk":       "splits/mybase-master.apk",
+				"Foo-xhdpi.apk": "splits/mybase-xhdpi.apk",
+			},
+		},
+		{
+			name:       "universal",
+			moduleName: "base",
+			stem:       "Bar",
+			expected: map[string]string{
+				"Bar.apk": "universal.apk",
+			},
+		},
 	}
-	apkSet := ApkSet{entries: make(map[string]*zip.File)}
-	sel := SelectionResult{moduleName: "mybase"}
-	for _, in := range expected {
-		apkSet.entries[in] = &zip.File{FileHeader: zip.FileHeader{Name: in}}
-		sel.entries = append(sel.entries, in)
-	}
-	writer := testZip2ZipWriter{make(map[string]string)}
-	config := TargetConfig{stem: "Foo"}
-	if err := apkSet.writeApks(sel, config, writer); err != nil {
-		t.Error(err)
-	}
-	if !reflect.DeepEqual(expected, writer.entries) {
-		t.Errorf("expected %v, got %v", expected, writer.entries)
+	for _, testCase := range testCases {
+		apkSet := ApkSet{entries: make(map[string]*zip.File)}
+		sel := SelectionResult{moduleName: testCase.moduleName}
+		for _, in := range testCase.expected {
+			apkSet.entries[in] = &zip.File{FileHeader: zip.FileHeader{Name: in}}
+			sel.entries = append(sel.entries, in)
+		}
+		writer := testZip2ZipWriter{make(map[string]string)}
+		config := TargetConfig{stem: testCase.stem}
+		if err := apkSet.writeApks(sel, config, writer); err != nil {
+			t.Error(err)
+		}
+		if !reflect.DeepEqual(testCase.expected, writer.entries) {
+			t.Errorf("expected %v, got %v", testCase.expected, writer.entries)
+		}
 	}
 }
diff --git a/dexpreopt/dexpreopt.go b/dexpreopt/dexpreopt.go
index f1dde9c..fc03563 100644
--- a/dexpreopt/dexpreopt.go
+++ b/dexpreopt/dexpreopt.go
@@ -82,7 +82,7 @@
 
 	if !dexpreoptDisabled(ctx, global, module) {
 		// Don't preopt individual boot jars, they will be preopted together.
-		if !contains(android.GetJarsFromApexJarPairs(global.BootJars), module.Name) {
+		if !contains(android.GetJarsFromApexJarPairs(ctx, global.BootJars), module.Name) {
 			appImage := (generateProfile || module.ForceCreateAppImage || global.DefaultAppImages) &&
 				!module.NoCreateAppImage
 
@@ -104,7 +104,7 @@
 
 	// Don't preopt system server jars that are updatable.
 	for _, p := range global.UpdatableSystemServerJars {
-		if _, jar := android.SplitApexJarPair(p); jar == module.Name {
+		if _, jar := android.SplitApexJarPair(ctx, p); jar == module.Name {
 			return true
 		}
 	}
@@ -113,7 +113,7 @@
 	// Also preopt system server jars since selinux prevents system server from loading anything from
 	// /data. If we don't do this they will need to be extracted which is not favorable for RAM usage
 	// or performance. If PreoptExtractedApk is true, we ignore the only preopt boot image options.
-	if global.OnlyPreoptBootImageAndSystemServer && !contains(android.GetJarsFromApexJarPairs(global.BootJars), module.Name) &&
+	if global.OnlyPreoptBootImageAndSystemServer && !contains(android.GetJarsFromApexJarPairs(ctx, global.BootJars), module.Name) &&
 		!contains(global.SystemServerJars, module.Name) && !module.PreoptExtractedApk {
 		return true
 	}
@@ -561,8 +561,8 @@
 }
 
 // Expected format for apexJarValue = <apex name>:<jar name>
-func GetJarLocationFromApexJarPair(apexJarValue string) string {
-	apex, jar := android.SplitApexJarPair(apexJarValue)
+func GetJarLocationFromApexJarPair(ctx android.PathContext, apexJarValue string) string {
+	apex, jar := android.SplitApexJarPair(ctx, apexJarValue)
 	return filepath.Join("/apex", apex, "javalib", jar+".jar")
 }
 
@@ -573,7 +573,7 @@
 func NonUpdatableSystemServerJars(ctx android.PathContext, global *GlobalConfig) []string {
 	return ctx.Config().Once(nonUpdatableSystemServerJarsKey, func() interface{} {
 		return android.RemoveListFromList(global.SystemServerJars,
-			android.GetJarsFromApexJarPairs(global.UpdatableSystemServerJars))
+			android.GetJarsFromApexJarPairs(ctx, global.UpdatableSystemServerJars))
 	}).([]string)
 }
 
diff --git a/java/aar.go b/java/aar.go
index 6e3b9e6..c8daf83 100644
--- a/java/aar.go
+++ b/java/aar.go
@@ -379,8 +379,11 @@
 				sharedLibs = append(sharedLibs, exportPackage)
 			}
 
-			if _, ok := module.(SdkLibraryDependency); ok {
-				sdkLibraries = append(sdkLibraries, ctx.OtherModuleName(module))
+			// If the module is (or possibly could be) a component of a java_sdk_library
+			// (including the java_sdk_library) itself then append any implicit sdk library
+			// names to the list of sdk libraries to be added to the manifest.
+			if component, ok := module.(SdkLibraryComponentDependency); ok {
+				sdkLibraries = append(sdkLibraries, component.OptionalImplicitSdkLibrary()...)
 			}
 
 		case frameworkResTag:
@@ -513,6 +516,7 @@
 
 	module.androidLibraryProperties.BuildAAR = true
 
+	android.InitApexModule(module)
 	InitJavaModule(module, android.DeviceSupported)
 	return module
 }
@@ -537,8 +541,12 @@
 type AARImport struct {
 	android.ModuleBase
 	android.DefaultableModuleBase
+	android.ApexModuleBase
 	prebuilt android.Prebuilt
 
+	// Functionality common to Module and Import.
+	embeddableInModuleAndImport
+
 	properties AARImportProperties
 
 	classpathFile         android.WritablePath
@@ -742,6 +750,10 @@
 	return nil, nil
 }
 
+func (a *AARImport) DepIsInSameApex(ctx android.BaseModuleContext, dep android.Module) bool {
+	return a.depIsInSameApex(ctx, dep)
+}
+
 var _ android.PrebuiltInterface = (*Import)(nil)
 
 // android_library_import imports an `.aar` file into the build graph as if it was built with android_library.
@@ -754,6 +766,7 @@
 	module.AddProperties(&module.properties)
 
 	android.InitPrebuiltModule(module, &module.properties.Aars)
+	android.InitApexModule(module)
 	InitJavaModule(module, android.DeviceSupported)
 	return module
 }
diff --git a/java/androidmk.go b/java/androidmk.go
index ba1af0d..6747b30 100644
--- a/java/androidmk.go
+++ b/java/androidmk.go
@@ -211,6 +211,11 @@
 }
 
 func (prebuilt *AARImport) AndroidMkEntries() []android.AndroidMkEntries {
+	if !prebuilt.IsForPlatform() {
+		return []android.AndroidMkEntries{{
+			Disabled: true,
+		}}
+	}
 	return []android.AndroidMkEntries{android.AndroidMkEntries{
 		Class:      "JAVA_LIBRARIES",
 		OutputFile: android.OptionalPathForPath(prebuilt.classpathFile),
@@ -416,6 +421,11 @@
 }
 
 func (a *AndroidLibrary) AndroidMkEntries() []android.AndroidMkEntries {
+	if !a.IsForPlatform() {
+		return []android.AndroidMkEntries{{
+			Disabled: true,
+		}}
+	}
 	entriesList := a.Library.AndroidMkEntries()
 	entries := &entriesList[0]
 
diff --git a/java/app.go b/java/app.go
index 37d198e..8241b68 100755
--- a/java/app.go
+++ b/java/app.go
@@ -96,16 +96,16 @@
 	return Bool(as.properties.Privileged)
 }
 
-var targetCpuAbi = map[string]string{
+var TargetCpuAbi = map[string]string{
 	"arm":    "ARMEABI_V7A",
 	"arm64":  "ARM64_V8A",
 	"x86":    "X86",
 	"x86_64": "X86_64",
 }
 
-func supportedAbis(ctx android.ModuleContext) []string {
+func SupportedAbis(ctx android.ModuleContext) []string {
 	abiName := func(archVar string, deviceArch string) string {
-		if abi, found := targetCpuAbi[deviceArch]; found {
+		if abi, found := TargetCpuAbi[deviceArch]; found {
 			return abi
 		}
 		ctx.ModuleErrorf("Invalid %s: %s", archVar, deviceArch)
@@ -138,7 +138,7 @@
 			Output:      as.packedOutput,
 			Inputs:      android.Paths{as.prebuilt.SingleSourcePath(ctx)},
 			Args: map[string]string{
-				"abis":              strings.Join(supportedAbis(ctx), ","),
+				"abis":              strings.Join(SupportedAbis(ctx), ","),
 				"allow-prereleased": strconv.FormatBool(proptools.Bool(as.properties.Prerelease)),
 				"screen-densities":  screenDensities,
 				"sdk-version":       ctx.Config().PlatformSdkVersion(),
@@ -1005,6 +1005,7 @@
 }
 
 func (a *AndroidTest) GenerateAndroidBuildActions(ctx android.ModuleContext) {
+	var configs []tradefed.Config
 	if a.appTestProperties.Instrumentation_target_package != nil {
 		a.additionalAaptFlags = append(a.additionalAaptFlags,
 			"--rename-instrumentation-target-package "+*a.appTestProperties.Instrumentation_target_package)
@@ -1017,8 +1018,12 @@
 	}
 	a.generateAndroidBuildActions(ctx)
 
+	for _, module := range a.testProperties.Test_mainline_modules {
+		configs = append(configs, tradefed.Option{Name: "config-descriptor:metadata", Key: "mainline-param", Value: module})
+	}
+
 	testConfig := tradefed.AutoGenInstrumentationTestConfig(ctx, a.testProperties.Test_config,
-		a.testProperties.Test_config_template, a.manifestPath, a.testProperties.Test_suites, a.testProperties.Auto_gen_config)
+		a.testProperties.Test_config_template, a.manifestPath, a.testProperties.Test_suites, a.testProperties.Auto_gen_config, configs)
 	a.testConfig = a.FixTestConfig(ctx, testConfig)
 	a.data = android.PathsForModuleSrc(ctx, a.testProperties.Data)
 }
@@ -1256,6 +1261,8 @@
 
 	usesLibrary usesLibrary
 
+	preprocessed bool
+
 	installPath android.InstallPath
 }
 
@@ -1271,6 +1278,9 @@
 	// be set for presigned modules.
 	Presigned *bool
 
+	// Name of the signing certificate lineage file.
+	Lineage *string
+
 	// Sign with the default system dev certificate. Must be used judiciously. Most imported apps
 	// need to either specify a specific certificate or be presigned.
 	Default_dev_cert *bool
@@ -1345,7 +1355,7 @@
 	ctx android.ModuleContext, inputPath android.Path, outputPath android.OutputPath) {
 	// Test apps don't need their JNI libraries stored uncompressed. As a matter of fact, messing
 	// with them may invalidate pre-existing signature data.
-	if ctx.InstallInTestcases() && Bool(a.properties.Presigned) {
+	if ctx.InstallInTestcases() && (Bool(a.properties.Presigned) || a.preprocessed) {
 		ctx.Build(pctx, android.BuildParams{
 			Rule:   android.Cp,
 			Output: outputPath,
@@ -1366,7 +1376,7 @@
 
 // Returns whether this module should have the dex file stored uncompressed in the APK.
 func (a *AndroidAppImport) shouldUncompressDex(ctx android.ModuleContext) bool {
-	if ctx.Config().UnbundledBuild() {
+	if ctx.Config().UnbundledBuild() || a.preprocessed {
 		return false
 	}
 
@@ -1458,9 +1468,13 @@
 
 	apkFilename := proptools.StringDefault(a.properties.Filename, a.BaseModuleName()+".apk")
 
-	// Sign or align the package
 	// TODO: Handle EXTERNAL
-	if !Bool(a.properties.Presigned) {
+
+	// Sign or align the package if package has not been preprocessed
+	if a.preprocessed {
+		a.outputFile = srcApk
+		a.certificate = presignedCertificate
+	} else if !Bool(a.properties.Presigned) {
 		// If the certificate property is empty at this point, default_dev_cert must be set to true.
 		// Which makes processMainCert's behavior for the empty cert string WAI.
 		certificates = processMainCert(a.ModuleBase, String(a.properties.Certificate), certificates, ctx)
@@ -1469,7 +1483,11 @@
 		}
 		a.certificate = certificates[0]
 		signed := android.PathForModuleOut(ctx, "signed", apkFilename)
-		SignAppPackage(ctx, signed, dexOutput, certificates, nil)
+		var lineageFile android.Path
+		if lineage := String(a.properties.Lineage); lineage != "" {
+			lineageFile = android.PathForModuleSrc(ctx, lineage)
+		}
+		SignAppPackage(ctx, signed, dexOutput, certificates, lineageFile)
 		a.outputFile = signed
 	} else {
 		alignedApk := android.PathForModuleOut(ctx, "zip-aligned", apkFilename)
@@ -1601,15 +1619,24 @@
 	return module
 }
 
+type androidTestImportProperties struct {
+	// Whether the prebuilt apk can be installed without additional processing. Default is false.
+	Preprocessed *bool
+}
+
 type AndroidTestImport struct {
 	AndroidAppImport
 
 	testProperties testProperties
 
+	testImportProperties androidTestImportProperties
+
 	data android.Paths
 }
 
 func (a *AndroidTestImport) GenerateAndroidBuildActions(ctx android.ModuleContext) {
+	a.preprocessed = Bool(a.testImportProperties.Preprocessed)
+
 	a.generateAndroidBuildActions(ctx)
 
 	a.data = android.PathsForModuleSrc(ctx, a.testProperties.Data)
@@ -1627,6 +1654,7 @@
 	module.AddProperties(&module.dexpreoptProperties)
 	module.AddProperties(&module.usesLibrary.usesLibraryProperties)
 	module.AddProperties(&module.testProperties)
+	module.AddProperties(&module.testImportProperties)
 	module.populateAllVariantStructs()
 	android.AddLoadHook(module, func(ctx android.LoadHookContext) {
 		module.processVariants(ctx)
diff --git a/java/app_builder.go b/java/app_builder.go
index 1efc856..fb9ab42 100644
--- a/java/app_builder.go
+++ b/java/app_builder.go
@@ -81,6 +81,7 @@
 	var flags []string
 	if lineageFile != nil {
 		flags = append(flags, "--lineage", lineageFile.String())
+		deps = append(deps, lineageFile)
 	}
 
 	ctx.Build(pctx, android.BuildParams{
diff --git a/java/app_test.go b/java/app_test.go
index 2195afd..1a718f4 100644
--- a/java/app_test.go
+++ b/java/app_test.go
@@ -2071,6 +2071,27 @@
 	}
 }
 
+func TestAndroidAppImport_SigningLineage(t *testing.T) {
+	ctx, _ := testJava(t, `
+	  android_app_import {
+			name: "foo",
+			apk: "prebuilts/apk/app.apk",
+			certificate: "platform",
+			lineage: "lineage.bin",
+		}
+	`)
+
+	variant := ctx.ModuleForTests("foo", "android_common")
+
+	// Check cert signing lineage flag.
+	signedApk := variant.Output("signed/foo.apk")
+	signingFlag := signedApk.Args["flags"]
+	expected := "--lineage lineage.bin"
+	if expected != signingFlag {
+		t.Errorf("Incorrect signing flags, expected: %q, got: %q", expected, signingFlag)
+	}
+}
+
 func TestAndroidAppImport_DefaultDevCert(t *testing.T) {
 	ctx, _ := testJava(t, `
 		android_app_import {
@@ -2348,6 +2369,45 @@
 	if jniRule != android.Cp.String() {
 		t.Errorf("Unexpected JNI uncompress rule: " + jniRule)
 	}
+	if variant.MaybeOutput("zip-aligned/foo_presigned.apk").Rule == nil {
+		t.Errorf("Presigned test apk should be aligned")
+	}
+}
+
+func TestAndroidTestImport_Preprocessed(t *testing.T) {
+	ctx, _ := testJava(t, `
+		android_test_import {
+			name: "foo",
+			apk: "prebuilts/apk/app.apk",
+			presigned: true,
+			preprocessed: true,
+		}
+
+		android_test_import {
+			name: "foo_cert",
+			apk: "prebuilts/apk/app.apk",
+			certificate: "cert/new_cert",
+			preprocessed: true,
+		}
+		`)
+
+	testModules := []string{"foo", "foo_cert"}
+	for _, m := range testModules {
+		apkName := m + ".apk"
+		variant := ctx.ModuleForTests(m, "android_common")
+		jniRule := variant.Output("jnis-uncompressed/" + apkName).BuildParams.Rule.String()
+		if jniRule != android.Cp.String() {
+			t.Errorf("Unexpected JNI uncompress rule: " + jniRule)
+		}
+
+		// Make sure signing and aligning were skipped.
+		if variant.MaybeOutput("signed/"+apkName).Rule != nil {
+			t.Errorf("signing rule shouldn't be included for preprocessed.")
+		}
+		if variant.MaybeOutput("zip-aligned/"+apkName).Rule != nil {
+			t.Errorf("aligning rule shouldn't be for preprocessed")
+		}
+	}
 }
 
 func TestStl(t *testing.T) {
@@ -2423,6 +2483,20 @@
 		}
 
 		java_sdk_library {
+			name: "qux",
+			srcs: ["a.java"],
+			api_packages: ["qux"],
+			sdk_version: "current",
+		}
+
+		java_sdk_library {
+			name: "quuz",
+			srcs: ["a.java"],
+			api_packages: ["quuz"],
+			sdk_version: "current",
+		}
+
+		java_sdk_library {
 			name: "bar",
 			srcs: ["a.java"],
 			api_packages: ["bar"],
@@ -2432,6 +2506,7 @@
 		android_app {
 			name: "app",
 			srcs: ["a.java"],
+			libs: ["qux", "quuz.stubs"],
 			uses_libs: ["foo"],
 			sdk_version: "current",
 			optional_uses_libs: [
@@ -2462,6 +2537,15 @@
 	app := ctx.ModuleForTests("app", "android_common")
 	prebuilt := ctx.ModuleForTests("prebuilt", "android_common")
 
+	// Test that implicit dependencies on java_sdk_library instances are passed to the manifest.
+	manifestFixerArgs := app.Output("manifest_fixer/AndroidManifest.xml").Args["args"]
+	if w := "--uses-library qux"; !strings.Contains(manifestFixerArgs, w) {
+		t.Errorf("unexpected manifest_fixer args: wanted %q in %q", w, manifestFixerArgs)
+	}
+	if w := "--uses-library quuz"; !strings.Contains(manifestFixerArgs, w) {
+		t.Errorf("unexpected manifest_fixer args: wanted %q in %q", w, manifestFixerArgs)
+	}
+
 	// Test that all libraries are verified
 	cmd := app.Rule("verify_uses_libraries").RuleParams.Command
 	if w := "--uses-library foo"; !strings.Contains(cmd, w) {
diff --git a/java/dexpreopt_bootjars.go b/java/dexpreopt_bootjars.go
index dffdc24..90457d0 100644
--- a/java/dexpreopt_bootjars.go
+++ b/java/dexpreopt_bootjars.go
@@ -109,11 +109,11 @@
 	return nil
 }
 
-func (image bootImageConfig) moduleName(idx int) string {
+func (image bootImageConfig) moduleName(ctx android.PathContext, idx int) string {
 	// Dexpreopt on the boot class path produces multiple files. The first dex file
 	// is converted into 'name'.art (to match the legacy assumption that 'name'.art
 	// exists), and the rest are converted to 'name'-<jar>.art.
-	_, m := android.SplitApexJarPair(image.modules[idx])
+	_, m := android.SplitApexJarPair(ctx, image.modules[idx])
 	name := image.stem
 	if idx != 0 || image.extends != nil {
 		name += "-" + stemOf(m)
@@ -121,9 +121,9 @@
 	return name
 }
 
-func (image bootImageConfig) firstModuleNameOrStem() string {
+func (image bootImageConfig) firstModuleNameOrStem(ctx android.PathContext) string {
 	if len(image.modules) > 0 {
-		return image.moduleName(0)
+		return image.moduleName(ctx, 0)
 	} else {
 		return image.stem
 	}
@@ -132,7 +132,7 @@
 func (image bootImageConfig) moduleFiles(ctx android.PathContext, dir android.OutputPath, exts ...string) android.OutputPaths {
 	ret := make(android.OutputPaths, 0, len(image.modules)*len(exts))
 	for i := range image.modules {
-		name := image.moduleName(i)
+		name := image.moduleName(ctx, i)
 		for _, ext := range exts {
 			ret = append(ret, dir.Join(ctx, name+ext))
 		}
@@ -261,7 +261,7 @@
 	}
 
 	name := ctx.ModuleName(module)
-	index := android.IndexList(name, android.GetJarsFromApexJarPairs(image.modules))
+	index := android.IndexList(name, android.GetJarsFromApexJarPairs(ctx, image.modules))
 	if index == -1 {
 		return -1, nil
 	}
@@ -314,7 +314,7 @@
 	// Ensure all modules were converted to paths
 	for i := range bootDexJars {
 		if bootDexJars[i] == nil {
-			_, m := android.SplitApexJarPair(image.modules[i])
+			_, m := android.SplitApexJarPair(ctx, image.modules[i])
 			if ctx.Config().AllowMissingDependencies() {
 				missingDeps = append(missingDeps, m)
 				bootDexJars[i] = android.PathForOutput(ctx, "missing")
@@ -614,7 +614,7 @@
 
 	return ctx.Config().Once(updatableBcpPackagesRuleKey, func() interface{} {
 		global := dexpreopt.GetGlobalConfig(ctx)
-		updatableModules := android.GetJarsFromApexJarPairs(global.UpdatableBootJars)
+		updatableModules := android.GetJarsFromApexJarPairs(ctx, global.UpdatableBootJars)
 
 		// Collect `permitted_packages` for updatable boot jars.
 		var updatablePackages []string
diff --git a/java/dexpreopt_bootjars_test.go b/java/dexpreopt_bootjars_test.go
index 0946bf0..e9704dc 100644
--- a/java/dexpreopt_bootjars_test.go
+++ b/java/dexpreopt_bootjars_test.go
@@ -24,7 +24,7 @@
 	"android/soong/dexpreopt"
 )
 
-func TestDexpreoptBootJars(t *testing.T) {
+func testDexpreoptBoot(t *testing.T, ruleFile string, expectedInputs, expectedOutputs []string) {
 	bp := `
 		java_sdk_library {
 			name: "foo",
@@ -52,14 +52,39 @@
 	dexpreopt.SetTestGlobalConfig(config, dexpreoptConfig)
 
 	ctx := testContext()
-
 	RegisterDexpreoptBootJarsComponents(ctx)
-
 	run(t, ctx, config)
 
 	dexpreoptBootJars := ctx.SingletonForTests("dex_bootjars")
+	rule := dexpreoptBootJars.Output(ruleFile)
 
-	bootArt := dexpreoptBootJars.Output("boot-foo.art")
+	for i := range expectedInputs {
+		expectedInputs[i] = filepath.Join(buildDir, "test_device", expectedInputs[i])
+	}
+
+	for i := range expectedOutputs {
+		expectedOutputs[i] = filepath.Join(buildDir, "test_device", expectedOutputs[i])
+	}
+
+	inputs := rule.Implicits.Strings()
+	sort.Strings(inputs)
+	sort.Strings(expectedInputs)
+
+	outputs := append(android.WritablePaths{rule.Output}, rule.ImplicitOutputs...).Strings()
+	sort.Strings(outputs)
+	sort.Strings(expectedOutputs)
+
+	if !reflect.DeepEqual(inputs, expectedInputs) {
+		t.Errorf("want inputs %q\n got inputs %q", expectedInputs, inputs)
+	}
+
+	if !reflect.DeepEqual(outputs, expectedOutputs) {
+		t.Errorf("want outputs %q\n got outputs %q", expectedOutputs, outputs)
+	}
+}
+
+func TestDexpreoptBootJars(t *testing.T) {
+	ruleFile := "boot-foo.art"
 
 	expectedInputs := []string{
 		"dex_artjars/android/apex/com.android.art/javalib/arm64/boot.art",
@@ -68,47 +93,43 @@
 		"dex_bootjars_input/baz.jar",
 	}
 
-	for i := range expectedInputs {
-		expectedInputs[i] = filepath.Join(buildDir, "test_device", expectedInputs[i])
-	}
-
-	inputs := bootArt.Implicits.Strings()
-	sort.Strings(inputs)
-	sort.Strings(expectedInputs)
-
-	if !reflect.DeepEqual(inputs, expectedInputs) {
-		t.Errorf("want inputs %q\n got inputs %q", expectedInputs, inputs)
-	}
-
 	expectedOutputs := []string{
 		"dex_bootjars/android/system/framework/arm64/boot.invocation",
-
 		"dex_bootjars/android/system/framework/arm64/boot-foo.art",
 		"dex_bootjars/android/system/framework/arm64/boot-bar.art",
 		"dex_bootjars/android/system/framework/arm64/boot-baz.art",
-
 		"dex_bootjars/android/system/framework/arm64/boot-foo.oat",
 		"dex_bootjars/android/system/framework/arm64/boot-bar.oat",
 		"dex_bootjars/android/system/framework/arm64/boot-baz.oat",
-
 		"dex_bootjars/android/system/framework/arm64/boot-foo.vdex",
 		"dex_bootjars/android/system/framework/arm64/boot-bar.vdex",
 		"dex_bootjars/android/system/framework/arm64/boot-baz.vdex",
-
 		"dex_bootjars_unstripped/android/system/framework/arm64/boot-foo.oat",
 		"dex_bootjars_unstripped/android/system/framework/arm64/boot-bar.oat",
 		"dex_bootjars_unstripped/android/system/framework/arm64/boot-baz.oat",
 	}
 
-	for i := range expectedOutputs {
-		expectedOutputs[i] = filepath.Join(buildDir, "test_device", expectedOutputs[i])
+	testDexpreoptBoot(t, ruleFile, expectedInputs, expectedOutputs)
+}
+
+// Changes to the boot.zip structure may break the ART APK scanner.
+func TestDexpreoptBootZip(t *testing.T) {
+	ruleFile := "boot.zip"
+
+	ctx := android.PathContextForTesting(testConfig(nil, "", nil))
+	expectedInputs := []string{}
+	for _, target := range dexpreoptTargets(ctx) {
+		for _, ext := range []string{".art", ".oat", ".vdex"} {
+			for _, jar := range []string{"foo", "bar", "baz"} {
+				expectedInputs = append(expectedInputs,
+					filepath.Join("dex_bootjars", target.Os.String(), "system/framework", target.Arch.ArchType.String(), "boot-"+jar+ext))
+			}
+		}
 	}
 
-	outputs := append(android.WritablePaths{bootArt.Output}, bootArt.ImplicitOutputs...).Strings()
-	sort.Strings(outputs)
-	sort.Strings(expectedOutputs)
-
-	if !reflect.DeepEqual(outputs, expectedOutputs) {
-		t.Errorf("want outputs %q\n got outputs %q", expectedOutputs, outputs)
+	expectedOutputs := []string{
+		"dex_bootjars/boot.zip",
 	}
+
+	testDexpreoptBoot(t, ruleFile, expectedInputs, expectedOutputs)
 }
diff --git a/java/dexpreopt_config.go b/java/dexpreopt_config.go
index 41a2ca7..f13d9f2 100644
--- a/java/dexpreopt_config.go
+++ b/java/dexpreopt_config.go
@@ -39,7 +39,7 @@
 		// 2) The jars that are from an updatable apex.
 		for _, m := range global.UpdatableSystemServerJars {
 			systemServerClasspathLocations = append(systemServerClasspathLocations,
-				dexpreopt.GetJarLocationFromApexJarPair(m))
+				dexpreopt.GetJarLocationFromApexJarPair(ctx, m))
 		}
 		if len(systemServerClasspathLocations) != len(global.SystemServerJars)+len(global.UpdatableSystemServerJars) {
 			panic(fmt.Errorf("Wrong number of system server jars, got %d, expected %d",
@@ -80,7 +80,7 @@
 }
 
 func getDexLocation(ctx android.PathContext, target android.Target, module string) string {
-	apex, jar := android.SplitApexJarPair(module)
+	apex, jar := android.SplitApexJarPair(ctx, module)
 
 	name := stemOf(jar) + ".jar"
 
@@ -156,7 +156,7 @@
 			c.symbolsDir = deviceDir.Join(ctx, "dex_"+c.name+"jars_unstripped")
 
 			// expands to <stem>.art for primary image and <stem>-<1st module>.art for extension
-			imageName := c.firstModuleNameOrStem() + ".art"
+			imageName := c.firstModuleNameOrStem(ctx) + ".art"
 
 			// The path to bootclasspath dex files needs to be known at module
 			// GenerateAndroidBuildAction time, before the bootclasspath modules have been compiled.
@@ -164,7 +164,7 @@
 			// TODO(b/143682396): use module dependencies instead
 			inputDir := deviceDir.Join(ctx, "dex_"+c.name+"jars_input")
 			for _, m := range c.modules {
-				_, jar := android.SplitApexJarPair(m)
+				_, jar := android.SplitApexJarPair(ctx, m)
 				c.dexPaths = append(c.dexPaths, inputDir.Join(ctx, stemOf(jar)+".jar"))
 			}
 			c.dexPathsDeps = c.dexPaths
@@ -215,7 +215,7 @@
 
 		updatableBootclasspath := make([]string, len(global.UpdatableBootJars))
 		for i, p := range global.UpdatableBootJars {
-			updatableBootclasspath[i] = dexpreopt.GetJarLocationFromApexJarPair(p)
+			updatableBootclasspath[i] = dexpreopt.GetJarLocationFromApexJarPair(ctx, p)
 		}
 
 		bootclasspath := append(copyOf(image.getAnyAndroidVariant().dexLocationsDeps), updatableBootclasspath...)
diff --git a/java/droiddoc.go b/java/droiddoc.go
index 414882c..a5a6785 100644
--- a/java/droiddoc.go
+++ b/java/droiddoc.go
@@ -351,11 +351,16 @@
 	ApiFilePath() android.Path
 }
 
+type ApiStubsSrcProvider interface {
+	StubsSrcJar() android.Path
+}
+
 // Provider of information about API stubs, used by java_sdk_library.
 type ApiStubsProvider interface {
 	ApiFilePath
 	RemovedApiFilePath() android.Path
-	StubsSrcJar() android.Path
+
+	ApiStubsSrcProvider
 }
 
 //
@@ -1932,6 +1937,10 @@
 	}
 }
 
+func (d *PrebuiltStubsSources) StubsSrcJar() android.Path {
+	return d.stubsSrcJar
+}
+
 func (p *PrebuiltStubsSources) GenerateAndroidBuildActions(ctx android.ModuleContext) {
 	p.stubsSrcJar = android.PathForModuleOut(ctx, ctx.ModuleName()+"-"+"stubs.srcjar")
 
diff --git a/java/hiddenapi.go b/java/hiddenapi.go
index 884a757..ce624bf 100644
--- a/java/hiddenapi.go
+++ b/java/hiddenapi.go
@@ -180,7 +180,9 @@
 	// b/149353192: when a module is instrumented, jacoco adds synthetic members
 	// $jacocoData and $jacocoInit. Since they don't exist when building the hidden API flags,
 	// don't complain when we don't find hidden API flags for the synthetic members.
-	if j, ok := ctx.Module().(*Library); ok && j.shouldInstrument(ctx) {
+	if j, ok := ctx.Module().(interface {
+		shouldInstrument(android.BaseModuleContext) bool
+	}); ok && j.shouldInstrument(ctx) {
 		enforceHiddenApiFlagsToAllMembers = false
 	}
 
diff --git a/java/java.go b/java/java.go
index 17b963f..b97defa 100644
--- a/java/java.go
+++ b/java/java.go
@@ -350,6 +350,32 @@
 	return BoolDefault(me.Optimize.Enabled, me.Optimize.EnabledByDefault)
 }
 
+// Functionality common to Module and Import
+//
+// It is embedded in Module so its functionality can be used by methods in Module
+// but it is currently only initialized by Import and Library.
+type embeddableInModuleAndImport struct {
+
+	// Functionality related to this being used as a component of a java_sdk_library.
+	EmbeddableSdkLibraryComponent
+}
+
+func (e *embeddableInModuleAndImport) initModuleAndImport(moduleBase *android.ModuleBase) {
+	e.initSdkLibraryComponent(moduleBase)
+}
+
+// Module/Import's DepIsInSameApex(...) delegates to this method.
+//
+// This cannot implement DepIsInSameApex(...) directly as that leads to ambiguity with
+// the one provided by ApexModuleBase.
+func (e *embeddableInModuleAndImport) depIsInSameApex(ctx android.BaseModuleContext, dep android.Module) bool {
+	// dependencies other than the static linkage are all considered crossing APEX boundary
+	if staticLibTag == ctx.OtherModuleDependencyTag(dep) {
+		return true
+	}
+	return false
+}
+
 // Module contains the properties and members used by all java module types
 type Module struct {
 	android.ModuleBase
@@ -357,6 +383,9 @@
 	android.ApexModuleBase
 	android.SdkBase
 
+	// Functionality common to Module and Import.
+	embeddableInModuleAndImport
+
 	properties       CompilerProperties
 	protoProperties  android.ProtoProperties
 	deviceProperties CompilerDeviceProperties
@@ -473,11 +502,6 @@
 	JacocoReportClassesFile() android.Path
 }
 
-type SdkLibraryDependency interface {
-	SdkHeaderJars(ctx android.BaseModuleContext, sdkVersion sdkSpec) android.Paths
-	SdkImplementationJars(ctx android.BaseModuleContext, sdkVersion sdkSpec) android.Paths
-}
-
 type xref interface {
 	XrefJavaFiles() android.Paths
 }
@@ -624,13 +648,15 @@
 			}
 		} else if sdkDep.useModule {
 			ctx.AddVariationDependencies(nil, bootClasspathTag, sdkDep.bootclasspath...)
-			ctx.AddVariationDependencies(nil, systemModulesTag, sdkDep.systemModules)
 			ctx.AddVariationDependencies(nil, java9LibTag, sdkDep.java9Classpath...)
 			if j.deviceProperties.EffectiveOptimizeEnabled() && sdkDep.hasStandardLibs() {
 				ctx.AddVariationDependencies(nil, proguardRaiseTag, config.DefaultBootclasspathLibraries...)
 				ctx.AddVariationDependencies(nil, proguardRaiseTag, config.DefaultLibraries...)
 			}
 		}
+		if sdkDep.systemModules != "" {
+			ctx.AddVariationDependencies(nil, systemModulesTag, sdkDep.systemModules)
+		}
 
 		if ctx.ModuleName() == "android_stubs_current" ||
 			ctx.ModuleName() == "android_system_stubs_current" ||
@@ -905,6 +931,12 @@
 		}
 	}
 
+	// If this is a component library (stubs, etc.) for a java_sdk_library then
+	// add the name of that java_sdk_library to the exported sdk libs to make sure
+	// that, if necessary, a <uses-library> element for that java_sdk_library is
+	// added to the Android manifest.
+	j.exportedSdkLibs = append(j.exportedSdkLibs, j.OptionalImplicitSdkLibrary()...)
+
 	ctx.VisitDirectDeps(func(module android.Module) {
 		otherName := ctx.OtherModuleName(module)
 		tag := ctx.OtherModuleDependencyTag(module)
@@ -924,7 +956,7 @@
 			case libTag:
 				deps.classpath = append(deps.classpath, dep.SdkHeaderJars(ctx, j.sdkVersion())...)
 				// names of sdk libs that are directly depended are exported
-				j.exportedSdkLibs = append(j.exportedSdkLibs, otherName)
+				j.exportedSdkLibs = append(j.exportedSdkLibs, dep.OptionalImplicitSdkLibrary()...)
 			case staticLibTag:
 				ctx.ModuleErrorf("dependency on java_sdk_library %q can only be in libs", otherName)
 			}
@@ -1033,19 +1065,10 @@
 }
 
 func getJavaVersion(ctx android.ModuleContext, javaVersion string, sdkContext sdkContext) javaVersion {
-	sdk, err := sdkContext.sdkVersion().effectiveVersion(ctx)
-	if err != nil {
-		ctx.PropertyErrorf("sdk_version", "%s", err)
-	}
 	if javaVersion != "" {
 		return normalizeJavaVersion(ctx, javaVersion)
-	} else if ctx.Device() && sdk <= 23 {
-		return JAVA_VERSION_7
-	} else if ctx.Device() && sdk <= 29 {
-		return JAVA_VERSION_8
-	} else if ctx.Device() && ctx.Config().UnbundledBuildUsePrebuiltSdks() {
-		// TODO(b/142896162): once we have prebuilt system modules we can use 1.9 for unbundled builds
-		return JAVA_VERSION_8
+	} else if ctx.Device() {
+		return sdkContext.sdkVersion().defaultJavaLanguageVersion(ctx)
 	} else {
 		return JAVA_VERSION_9
 	}
@@ -1768,11 +1791,7 @@
 }
 
 func (j *Module) DepIsInSameApex(ctx android.BaseModuleContext, dep android.Module) bool {
-	// Dependencies other than the static linkage are all considered crossing APEX boundary
-	if staticLibTag == ctx.OtherModuleDependencyTag(dep) {
-		return true
-	}
-	return false
+	return j.depIsInSameApex(ctx, dep)
 }
 
 func (j *Module) Stem() string {
@@ -1978,6 +1997,8 @@
 		&module.Module.protoProperties,
 		&module.libraryProperties)
 
+	module.initModuleAndImport(&module.ModuleBase)
+
 	android.InitApexModule(module)
 	android.InitSdkAwareModule(module)
 	InitJavaModule(module, android.HostAndDeviceSupported)
@@ -2032,6 +2053,10 @@
 	// doesn't exist next to the Android.bp, this attribute doesn't need to be set to true
 	// explicitly.
 	Auto_gen_config *bool
+
+	// Add parameterized mainline modules to auto generated test config. The options will be
+	// handled by TradeFed to do downloading and installing the specified modules on the device.
+	Test_mainline_modules []string
 }
 
 type testHelperLibraryProperties struct {
@@ -2386,6 +2411,9 @@
 	prebuilt android.Prebuilt
 	android.SdkBase
 
+	// Functionality common to Module and Import.
+	embeddableInModuleAndImport
+
 	properties ImportProperties
 
 	combinedClasspathFile android.Path
@@ -2443,6 +2471,12 @@
 	}
 	j.combinedClasspathFile = outputFile
 
+	// If this is a component library (impl, stubs, etc.) for a java_sdk_library then
+	// add the name of that java_sdk_library to the exported sdk libs to make sure
+	// that, if necessary, a <uses-library> element for that java_sdk_library is
+	// added to the Android manifest.
+	j.exportedSdkLibs = append(j.exportedSdkLibs, j.OptionalImplicitSdkLibrary()...)
+
 	ctx.VisitDirectDeps(func(module android.Module) {
 		otherName := ctx.OtherModuleName(module)
 		tag := ctx.OtherModuleDependencyTag(module)
@@ -2520,11 +2554,7 @@
 }
 
 func (j *Import) DepIsInSameApex(ctx android.BaseModuleContext, dep android.Module) bool {
-	// dependencies other than the static linkage are all considered crossing APEX boundary
-	if staticLibTag == ctx.OtherModuleDependencyTag(dep) {
-		return true
-	}
-	return false
+	return j.depIsInSameApex(ctx, dep)
 }
 
 // Add compile time check for interface implementation
@@ -2565,6 +2595,8 @@
 
 	module.AddProperties(&module.properties)
 
+	module.initModuleAndImport(&module.ModuleBase)
+
 	android.InitPrebuiltModule(module, &module.properties.Jars)
 	android.InitApexModule(module)
 	android.InitSdkAwareModule(module)
diff --git a/java/java_test.go b/java/java_test.go
index f61f4bb..ab6d88e 100644
--- a/java/java_test.go
+++ b/java/java_test.go
@@ -19,6 +19,7 @@
 	"os"
 	"path/filepath"
 	"reflect"
+	"sort"
 	"strconv"
 	"strings"
 	"testing"
@@ -575,6 +576,7 @@
 			},
 			test: {
 				jars: ["c.jar"],
+				stub_srcs: ["c.java"],
 			},
 		}
 		`)
@@ -1152,13 +1154,42 @@
 		java_library {
 			name: "baz",
 			srcs: ["c.java"],
-			libs: ["foo", "bar"],
+			libs: ["foo", "bar.stubs"],
 			sdk_version: "system_current",
 		}
+		java_sdk_library {
+			name: "barney",
+			srcs: ["c.java"],
+			api_only: true,
+		}
+		java_sdk_library {
+			name: "betty",
+			srcs: ["c.java"],
+			shared_library: false,
+		}
+		java_sdk_library_import {
+		    name: "quuz",
+				public: {
+					jars: ["c.jar"],
+				},
+		}
+		java_sdk_library_import {
+		    name: "fred",
+				public: {
+					jars: ["b.jar"],
+				},
+		}
+		java_sdk_library_import {
+		    name: "wilma",
+				public: {
+					jars: ["b.jar"],
+				},
+				shared_library: false,
+		}
 		java_library {
 		    name: "qux",
 		    srcs: ["c.java"],
-		    libs: ["baz"],
+		    libs: ["baz", "fred", "quuz.stubs", "wilma", "barney", "betty"],
 		    sdk_version: "system_current",
 		}
 		java_library {
@@ -1223,12 +1254,120 @@
 	qux := ctx.ModuleForTests("qux", "android_common")
 	if quxLib, ok := qux.Module().(*Library); ok {
 		sdkLibs := quxLib.ExportedSdkLibs()
-		if len(sdkLibs) != 2 || !android.InList("foo", sdkLibs) || !android.InList("bar", sdkLibs) {
-			t.Errorf("qux should export \"foo\" and \"bar\" but exports %v", sdkLibs)
+		sort.Strings(sdkLibs)
+		if w := []string{"bar", "foo", "fred", "quuz"}; !reflect.DeepEqual(w, sdkLibs) {
+			t.Errorf("qux should export %q but exports %q", w, sdkLibs)
 		}
 	}
 }
 
+func TestJavaSdkLibrary_UseSourcesFromAnotherSdkLibrary(t *testing.T) {
+	testJava(t, `
+		java_sdk_library {
+			name: "foo",
+			srcs: ["a.java"],
+			api_packages: ["foo"],
+			public: {
+				enabled: true,
+			},
+		}
+
+		java_library {
+			name: "bar",
+			srcs: ["b.java", ":foo{.public.stubs.source}"],
+		}
+		`)
+}
+
+func TestJavaSdkLibrary_AccessOutputFiles_MissingScope(t *testing.T) {
+	testJavaError(t, `"foo" does not provide api scope system`, `
+		java_sdk_library {
+			name: "foo",
+			srcs: ["a.java"],
+			api_packages: ["foo"],
+			public: {
+				enabled: true,
+			},
+		}
+
+		java_library {
+			name: "bar",
+			srcs: ["b.java", ":foo{.system.stubs.source}"],
+		}
+		`)
+}
+
+func TestJavaSdkLibraryImport_AccessOutputFiles(t *testing.T) {
+	testJava(t, `
+		java_sdk_library_import {
+			name: "foo",
+			public: {
+				jars: ["a.jar"],
+				stub_srcs: ["a.java"],
+				current_api: "api/current.txt",
+				removed_api: "api/removed.txt",
+			},
+		}
+
+		java_library {
+			name: "bar",
+			srcs: [":foo{.public.stubs.source}"],
+			java_resources: [
+				":foo{.public.api.txt}",
+				":foo{.public.removed-api.txt}",
+			],
+		}
+		`)
+}
+
+func TestJavaSdkLibraryImport_AccessOutputFiles_Invalid(t *testing.T) {
+	bp := `
+		java_sdk_library_import {
+			name: "foo",
+			public: {
+				jars: ["a.jar"],
+			},
+		}
+		`
+
+	t.Run("stubs.source", func(t *testing.T) {
+		testJavaError(t, `stubs.source not available for api scope public`, bp+`
+		java_library {
+			name: "bar",
+			srcs: [":foo{.public.stubs.source}"],
+			java_resources: [
+				":foo{.public.api.txt}",
+				":foo{.public.removed-api.txt}",
+			],
+		}
+		`)
+	})
+
+	t.Run("api.txt", func(t *testing.T) {
+		testJavaError(t, `api.txt not available for api scope public`, bp+`
+		java_library {
+			name: "bar",
+			srcs: ["a.java"],
+			java_resources: [
+				":foo{.public.api.txt}",
+			],
+		}
+		`)
+	})
+
+	t.Run("removed-api.txt", func(t *testing.T) {
+		testJavaError(t, `removed-api.txt not available for api scope public`, bp+`
+		java_library {
+			name: "bar",
+			srcs: ["a.java"],
+			java_resources: [
+				":foo{.public.removed-api.txt}",
+			],
+		}
+		`)
+	})
+}
+
 func TestJavaSdkLibrary_InvalidScopes(t *testing.T) {
 	testJavaError(t, `module "foo": enabled api scope "system" depends on disabled scope "public"`, `
 		java_sdk_library {
@@ -1261,6 +1400,45 @@
 		`)
 }
 
+func TestJavaSdkLibrary_MissingScope(t *testing.T) {
+	testJavaError(t, `requires api scope module-lib from foo but it only has \[\] available`, `
+		java_sdk_library {
+			name: "foo",
+			srcs: ["a.java"],
+			public: {
+				enabled: false,
+			},
+		}
+
+		java_library {
+			name: "baz",
+			srcs: ["a.java"],
+			libs: ["foo"],
+			sdk_version: "module_current",
+		}
+		`)
+}
+
+func TestJavaSdkLibrary_FallbackScope(t *testing.T) {
+	testJava(t, `
+		java_sdk_library {
+			name: "foo",
+			srcs: ["a.java"],
+			system: {
+				enabled: true,
+			},
+		}
+
+		java_library {
+			name: "baz",
+			srcs: ["a.java"],
+			libs: ["foo"],
+			// foo does not have module-lib scope so it should fallback to system
+			sdk_version: "module_current",
+		}
+		`)
+}
+
 var compilerFlagsTestCases = []struct {
 	in  string
 	out bool
diff --git a/java/prebuilt_apis.go b/java/prebuilt_apis.go
index 03bc76b..999c72f 100644
--- a/java/prebuilt_apis.go
+++ b/java/prebuilt_apis.go
@@ -15,11 +15,12 @@
 package java
 
 import (
-	"android/soong/android"
 	"sort"
 	"strings"
 
 	"github.com/google/blueprint/proptools"
+
+	"android/soong/android"
 )
 
 func init() {
@@ -69,6 +70,10 @@
 	return
 }
 
+func prebuiltApiModuleName(mctx android.LoadHookContext, module string, scope string, apiver string) string {
+	return mctx.ModuleName() + "_" + scope + "_" + apiver + "_" + module
+}
+
 func createImport(mctx android.LoadHookContext, module string, scope string, apiver string, path string) {
 	props := struct {
 		Name        *string
@@ -76,7 +81,7 @@
 		Sdk_version *string
 		Installable *bool
 	}{}
-	props.Name = proptools.StringPtr(mctx.ModuleName() + "_" + scope + "_" + apiver + "_" + module)
+	props.Name = proptools.StringPtr(prebuiltApiModuleName(mctx, module, scope, apiver))
 	props.Jars = append(props.Jars, path)
 	// TODO(hansson): change to scope after migration is done.
 	props.Sdk_version = proptools.StringPtr("current")
@@ -124,6 +129,27 @@
 	}
 }
 
+func createSystemModules(mctx android.LoadHookContext, apiver string) {
+	props := struct {
+		Name *string
+		Libs []string
+	}{}
+	props.Name = proptools.StringPtr(prebuiltApiModuleName(mctx, "system_modules", "public", apiver))
+	props.Libs = append(props.Libs, prebuiltApiModuleName(mctx, "core-for-system-modules", "public", apiver))
+
+	mctx.CreateModule(SystemModulesFactory, &props)
+}
+
+func prebuiltSdkSystemModules(mctx android.LoadHookContext) {
+	for _, apiver := range mctx.Module().(*prebuiltApis).properties.Api_dirs {
+		jar := android.ExistentPathForSource(mctx,
+			mctx.ModuleDir(), apiver, "public", "core-for-system-modules.jar")
+		if jar.Valid() {
+			createSystemModules(mctx, apiver)
+		}
+	}
+}
+
 func prebuiltApiFiles(mctx android.LoadHookContext) {
 	mydir := mctx.ModuleDir() + "/"
 	// <apiver>/<scope>/api/<module>.txt
@@ -178,6 +204,7 @@
 	if _, ok := mctx.Module().(*prebuiltApis); ok {
 		prebuiltApiFiles(mctx)
 		prebuiltSdkStubs(mctx)
+		prebuiltSdkSystemModules(mctx)
 	}
 }
 
@@ -191,7 +218,9 @@
 // Similarly, it generates a java_import for all API .jar files found under the
 // directory where the Android.bp is located. Specifically, an API file located
 // at ./<ver>/<scope>/api/<module>.jar generates a java_import module named
-// <prebuilt-api-module>.<scope>.<ver>.<module>.
+// <prebuilt-api-module>_<scope>_<ver>_<module>, and for SDK versions >= 30
+// a java_system_modules module named
+// <prebuilt-api-module>_public_<ver>_system_modules
 func PrebuiltApisFactory() android.Module {
 	module := &prebuiltApis{}
 	module.AddProperties(&module.properties)
diff --git a/java/sdk.go b/java/sdk.go
index 690451c..9310f78 100644
--- a/java/sdk.go
+++ b/java/sdk.go
@@ -252,6 +252,20 @@
 	return ver.String(), err
 }
 
+func (s sdkSpec) defaultJavaLanguageVersion(ctx android.EarlyModuleContext) javaVersion {
+	sdk, err := s.effectiveVersion(ctx)
+	if err != nil {
+		ctx.PropertyErrorf("sdk_version", "%s", err)
+	}
+	if sdk <= 23 {
+		return JAVA_VERSION_7
+	} else if sdk <= 29 {
+		return JAVA_VERSION_8
+	} else {
+		return JAVA_VERSION_9
+	}
+}
+
 func sdkSpecFrom(str string) sdkSpec {
 	switch str {
 	// special cases first
@@ -370,10 +384,16 @@
 			return sdkDep{}
 		}
 
+		var systemModules string
+		if sdkVersion.defaultJavaLanguageVersion(ctx).usesJavaModules() {
+			systemModules = "sdk_public_" + sdkVersion.version.String() + "_system_modules"
+		}
+
 		return sdkDep{
-			useFiles: true,
-			jars:     android.Paths{jarPath.Path(), lambdaStubsPath},
-			aidl:     android.OptionalPathForPath(aidlPath.Path()),
+			useFiles:      true,
+			jars:          android.Paths{jarPath.Path(), lambdaStubsPath},
+			aidl:          android.OptionalPathForPath(aidlPath.Path()),
+			systemModules: systemModules,
 		}
 	}
 
diff --git a/java/sdk_library.go b/java/sdk_library.go
index 7e81c1e..2bdfe0d 100644
--- a/java/sdk_library.go
+++ b/java/sdk_library.go
@@ -19,6 +19,7 @@
 	"path"
 	"path/filepath"
 	"reflect"
+	"regexp"
 	"sort"
 	"strings"
 	"sync"
@@ -145,6 +146,8 @@
 // Initialize a scope, creating and adding appropriate dependency tags
 func initApiScope(scope *apiScope) *apiScope {
 	name := scope.name
+	scopeByName[name] = scope
+	allScopeNames = append(allScopeNames, name)
 	scope.propertyName = strings.ReplaceAll(name, "-", "_")
 	scope.fieldName = proptools.FieldNameForProperty(scope.propertyName)
 	scope.stubsTag = scopeDependencyTag{
@@ -217,6 +220,8 @@
 }
 
 var (
+	scopeByName    = make(map[string]*apiScope)
+	allScopeNames  []string
 	apiScopePublic = initApiScope(&apiScope{
 		name: "public",
 
@@ -367,7 +372,10 @@
 	// Defaults to "api".
 	Api_dir *string
 
-	// If set to true there is no runtime library.
+	// Determines whether a runtime implementation library is built; defaults to false.
+	//
+	// If true then it also prevents the module from being used as a shared module, i.e.
+	// it is as is shared_library: false, was set.
 	Api_only *bool
 
 	// local files that are used within user customized droiddoc options.
@@ -433,12 +441,30 @@
 	//Html_doc *bool
 }
 
+// Paths to outputs from java_sdk_library and java_sdk_library_import.
+//
+// Fields that are android.Paths are always set (during GenerateAndroidBuildActions).
+// OptionalPaths are always set by java_sdk_library but may not be set by
+// java_sdk_library_import as not all instances provide that information.
 type scopePaths struct {
-	stubsHeaderPath    android.Paths
-	stubsImplPath      android.Paths
-	currentApiFilePath android.Path
-	removedApiFilePath android.Path
-	stubsSrcJar        android.Path
+	// The path (represented as Paths for convenience when returning) to the stubs header jar.
+	//
+	// That is the jar that is created by turbine.
+	stubsHeaderPath android.Paths
+
+	// The path (represented as Paths for convenience when returning) to the stubs implementation jar.
+	//
+	// This is not the implementation jar, it still only contains stubs.
+	stubsImplPath android.Paths
+
+	// The API specification file, e.g. system_current.txt.
+	currentApiFilePath android.OptionalPath
+
+	// The specification of API elements removed since the last release.
+	removedApiFilePath android.OptionalPath
+
+	// The stubs source jar.
+	stubsSrcJar android.OptionalPath
 }
 
 func (paths *scopePaths) extractStubsLibraryInfoFromDependency(dep android.Module) error {
@@ -460,9 +486,18 @@
 	}
 }
 
+func (paths *scopePaths) treatDepAsApiStubsSrcProvider(dep android.Module, action func(provider ApiStubsSrcProvider)) error {
+	if apiStubsProvider, ok := dep.(ApiStubsSrcProvider); ok {
+		action(apiStubsProvider)
+		return nil
+	} else {
+		return fmt.Errorf("expected module that implements ApiStubsSrcProvider, e.g. droidstubs")
+	}
+}
+
 func (paths *scopePaths) extractApiInfoFromApiStubsProvider(provider ApiStubsProvider) {
-	paths.currentApiFilePath = provider.ApiFilePath()
-	paths.removedApiFilePath = provider.RemovedApiFilePath()
+	paths.currentApiFilePath = android.OptionalPathForPath(provider.ApiFilePath())
+	paths.removedApiFilePath = android.OptionalPathForPath(provider.RemovedApiFilePath())
 }
 
 func (paths *scopePaths) extractApiInfoFromDep(dep android.Module) error {
@@ -471,12 +506,12 @@
 	})
 }
 
-func (paths *scopePaths) extractStubsSourceInfoFromApiStubsProviders(provider ApiStubsProvider) {
-	paths.stubsSrcJar = provider.StubsSrcJar()
+func (paths *scopePaths) extractStubsSourceInfoFromApiStubsProviders(provider ApiStubsSrcProvider) {
+	paths.stubsSrcJar = android.OptionalPathForPath(provider.StubsSrcJar())
 }
 
 func (paths *scopePaths) extractStubsSourceInfoFromDep(dep android.Module) error {
-	return paths.treatDepAsApiStubsProvider(dep, func(provider ApiStubsProvider) {
+	return paths.treatDepAsApiStubsSrcProvider(dep, func(provider ApiStubsSrcProvider) {
 		paths.extractStubsSourceInfoFromApiStubsProviders(provider)
 	})
 }
@@ -500,6 +535,13 @@
 	//
 	// TODO(b/155480189) - Remove once naming inconsistencies have been resolved.
 	Naming_scheme *string
+
+	// Specifies whether this module can be used as an Android shared library; defaults
+	// to true.
+	//
+	// An Android shared library is one that can be referenced in a <uses-library> element
+	// in an AndroidManifest.xml.
+	Shared_library *bool
 }
 
 // Common code between sdk library and sdk library import
@@ -510,17 +552,23 @@
 
 	namingScheme sdkLibraryComponentNamingScheme
 
-	commonProperties commonToSdkLibraryAndImportProperties
+	commonSdkLibraryProperties commonToSdkLibraryAndImportProperties
+
+	// Functionality related to this being used as a component of a java_sdk_library.
+	EmbeddableSdkLibraryComponent
 }
 
 func (c *commonToSdkLibraryAndImport) initCommon(moduleBase *android.ModuleBase) {
 	c.moduleBase = moduleBase
 
-	moduleBase.AddProperties(&c.commonProperties)
+	moduleBase.AddProperties(&c.commonSdkLibraryProperties)
+
+	// Initialize this as an sdk library component.
+	c.initSdkLibraryComponent(moduleBase)
 }
 
 func (c *commonToSdkLibraryAndImport) initCommonAfterDefaultsApplied(ctx android.DefaultableHookContext) bool {
-	schemeProperty := proptools.StringDefault(c.commonProperties.Naming_scheme, "default")
+	schemeProperty := proptools.StringDefault(c.commonSdkLibraryProperties.Naming_scheme, "default")
 	switch schemeProperty {
 	case "default":
 		c.namingScheme = &defaultNamingScheme{}
@@ -531,6 +579,12 @@
 		return false
 	}
 
+	// Only track this sdk library if this can be used as a shared library.
+	if c.sharedLibrary() {
+		// Use the name specified in the module definition as the owner.
+		c.sdkLibraryComponentProperties.SdkLibraryToImplicitlyTrack = proptools.StringPtr(c.moduleBase.BaseModuleName())
+	}
+
 	return true
 }
 
@@ -551,7 +605,83 @@
 	return c.namingScheme.apiModuleName(apiScope, c.moduleBase.BaseModuleName())
 }
 
-func (c *commonToSdkLibraryAndImport) getScopePaths(scope *apiScope) *scopePaths {
+// The component names for different outputs of the java_sdk_library.
+//
+// They are similar to the names used for the child modules it creates
+const (
+	stubsSourceComponentName = "stubs.source"
+
+	apiTxtComponentName = "api.txt"
+
+	removedApiTxtComponentName = "removed-api.txt"
+)
+
+// A regular expression to match tags that reference a specific stubs component.
+//
+// It will only match if given a valid scope and a valid component. It is verfy strict
+// to ensure it does not accidentally match a similar looking tag that should be processed
+// by the embedded Library.
+var tagSplitter = func() *regexp.Regexp {
+	// Given a list of literal string items returns a regular expression that will
+	// match any one of the items.
+	choice := func(items ...string) string {
+		return `\Q` + strings.Join(items, `\E|\Q`) + `\E`
+	}
+
+	// Regular expression to match one of the scopes.
+	scopesRegexp := choice(allScopeNames...)
+
+	// Regular expression to match one of the components.
+	componentsRegexp := choice(stubsSourceComponentName, apiTxtComponentName, removedApiTxtComponentName)
+
+	// Regular expression to match any combination of one scope and one component.
+	return regexp.MustCompile(fmt.Sprintf(`^\.(%s)\.(%s)$`, scopesRegexp, componentsRegexp))
+}()
+
+// For OutputFileProducer interface
+//
+// .<scope>.stubs.source
+// .<scope>.api.txt
+// .<scope>.removed-api.txt
+func (c *commonToSdkLibraryAndImport) commonOutputFiles(tag string) (android.Paths, error) {
+	if groups := tagSplitter.FindStringSubmatch(tag); groups != nil {
+		scopeName := groups[1]
+		component := groups[2]
+
+		if scope, ok := scopeByName[scopeName]; ok {
+			paths := c.findScopePaths(scope)
+			if paths == nil {
+				return nil, fmt.Errorf("%q does not provide api scope %s", c.moduleBase.BaseModuleName(), scopeName)
+			}
+
+			switch component {
+			case stubsSourceComponentName:
+				if paths.stubsSrcJar.Valid() {
+					return android.Paths{paths.stubsSrcJar.Path()}, nil
+				}
+
+			case apiTxtComponentName:
+				if paths.currentApiFilePath.Valid() {
+					return android.Paths{paths.currentApiFilePath.Path()}, nil
+				}
+
+			case removedApiTxtComponentName:
+				if paths.removedApiFilePath.Valid() {
+					return android.Paths{paths.removedApiFilePath.Path()}, nil
+				}
+			}
+
+			return nil, fmt.Errorf("%s not available for api scope %s", component, scopeName)
+		} else {
+			return nil, fmt.Errorf("unknown scope %s in %s", scope, tag)
+		}
+
+	} else {
+		return nil, nil
+	}
+}
+
+func (c *commonToSdkLibraryAndImport) getScopePathsCreateIfNeeded(scope *apiScope) *scopePaths {
 	if c.scopePaths == nil {
 		c.scopePaths = make(map[*apiScope]*scopePaths)
 	}
@@ -564,6 +694,147 @@
 	return paths
 }
 
+func (c *commonToSdkLibraryAndImport) findScopePaths(scope *apiScope) *scopePaths {
+	if c.scopePaths == nil {
+		return nil
+	}
+
+	return c.scopePaths[scope]
+}
+
+// If this does not support the requested api scope then find the closest available
+// scope it does support. Returns nil if no such scope is available.
+func (c *commonToSdkLibraryAndImport) findClosestScopePath(scope *apiScope) *scopePaths {
+	for s := scope; s != nil; s = s.extends {
+		if paths := c.findScopePaths(s); paths != nil {
+			return paths
+		}
+	}
+
+	// This should never happen outside tests as public should be the base scope for every
+	// scope and is enabled by default.
+	return nil
+}
+
+func (c *commonToSdkLibraryAndImport) selectHeaderJarsForSdkVersion(ctx android.BaseModuleContext, sdkVersion sdkSpec) android.Paths {
+
+	// If a specific numeric version has been requested then use prebuilt versions of the sdk.
+	if sdkVersion.version.isNumbered() {
+		return PrebuiltJars(ctx, c.moduleBase.BaseModuleName(), sdkVersion)
+	}
+
+	var apiScope *apiScope
+	switch sdkVersion.kind {
+	case sdkSystem:
+		apiScope = apiScopeSystem
+	case sdkModule:
+		apiScope = apiScopeModuleLib
+	case sdkTest:
+		apiScope = apiScopeTest
+	default:
+		apiScope = apiScopePublic
+	}
+
+	paths := c.findClosestScopePath(apiScope)
+	if paths == nil {
+		var scopes []string
+		for _, s := range allApiScopes {
+			if c.findScopePaths(s) != nil {
+				scopes = append(scopes, s.name)
+			}
+		}
+		ctx.ModuleErrorf("requires api scope %s from %s but it only has %q available", apiScope.name, c.moduleBase.BaseModuleName(), scopes)
+		return nil
+	}
+
+	return paths.stubsHeaderPath
+}
+
+func (c *commonToSdkLibraryAndImport) sdkComponentPropertiesForChildLibrary() interface{} {
+	componentProps := &struct {
+		SdkLibraryToImplicitlyTrack *string
+	}{}
+
+	if c.sharedLibrary() {
+		// Mark the stubs library as being components of this java_sdk_library so that
+		// any app that includes code which depends (directly or indirectly) on the stubs
+		// library will have the appropriate <uses-library> invocation inserted into its
+		// manifest if necessary.
+		componentProps.SdkLibraryToImplicitlyTrack = proptools.StringPtr(c.moduleBase.BaseModuleName())
+	}
+
+	return componentProps
+}
+
+// Check if this can be used as a shared library.
+func (c *commonToSdkLibraryAndImport) sharedLibrary() bool {
+	return proptools.BoolDefault(c.commonSdkLibraryProperties.Shared_library, true)
+}
+
+// Properties related to the use of a module as an component of a java_sdk_library.
+type SdkLibraryComponentProperties struct {
+
+	// The name of the java_sdk_library/_import to add to a <uses-library> entry
+	// in the AndroidManifest.xml of any Android app that includes code that references
+	// this module. If not set then no java_sdk_library/_import is tracked.
+	SdkLibraryToImplicitlyTrack *string `blueprint:"mutated"`
+}
+
+// Structure to be embedded in a module struct that needs to support the
+// SdkLibraryComponentDependency interface.
+type EmbeddableSdkLibraryComponent struct {
+	sdkLibraryComponentProperties SdkLibraryComponentProperties
+}
+
+func (e *EmbeddableSdkLibraryComponent) initSdkLibraryComponent(moduleBase *android.ModuleBase) {
+	moduleBase.AddProperties(&e.sdkLibraryComponentProperties)
+}
+
+// to satisfy SdkLibraryComponentDependency
+func (e *EmbeddableSdkLibraryComponent) OptionalImplicitSdkLibrary() []string {
+	if e.sdkLibraryComponentProperties.SdkLibraryToImplicitlyTrack != nil {
+		return []string{*e.sdkLibraryComponentProperties.SdkLibraryToImplicitlyTrack}
+	}
+	return nil
+}
+
+// Implemented by modules that are (or possibly could be) a component of a java_sdk_library
+// (including the java_sdk_library) itself.
+type SdkLibraryComponentDependency interface {
+	// The optional name of the sdk library that should be implicitly added to the
+	// AndroidManifest of an app that contains code which references the sdk library.
+	//
+	// Returns an array containing 0 or 1 items rather than a *string to make it easier
+	// to append this to the list of exported sdk libraries.
+	OptionalImplicitSdkLibrary() []string
+}
+
+// Make sure that all the module types that are components of java_sdk_library/_import
+// and which can be referenced (directly or indirectly) from an android app implement
+// the SdkLibraryComponentDependency interface.
+var _ SdkLibraryComponentDependency = (*Library)(nil)
+var _ SdkLibraryComponentDependency = (*Import)(nil)
+var _ SdkLibraryComponentDependency = (*SdkLibrary)(nil)
+var _ SdkLibraryComponentDependency = (*sdkLibraryImport)(nil)
+
+// Provides access to sdk_version related header and implentation jars.
+type SdkLibraryDependency interface {
+	SdkLibraryComponentDependency
+
+	// Get the header jars appropriate for the supplied sdk_version.
+	//
+	// These are turbine generated jars so they only change if the externals of the
+	// class changes but it does not contain and implementation or JavaDoc.
+	SdkHeaderJars(ctx android.BaseModuleContext, sdkVersion sdkSpec) android.Paths
+
+	// Get the implementation jars appropriate for the supplied sdk version.
+	//
+	// These are either the implementation jar for the whole sdk library or the implementation
+	// jars for the stubs. The latter should only be needed when generating JavaDoc as otherwise
+	// they are identical to the corresponding header jars.
+	SdkImplementationJars(ctx android.BaseModuleContext, sdkVersion sdkSpec) android.Paths
+}
+
 type SdkLibrary struct {
 	Library
 
@@ -656,17 +927,29 @@
 		}
 	}
 
-	if !proptools.Bool(module.sdkLibraryProperties.Api_only) {
-		// Add dependency to the rule for generating the xml permissions file
-		ctx.AddDependency(module, xmlPermissionsFileTag, module.xmlFileName())
-	}
+	if module.requiresRuntimeImplementationLibrary() {
+		if module.sharedLibrary() {
+			// Add dependency to the rule for generating the xml permissions file
+			ctx.AddDependency(module, xmlPermissionsFileTag, module.xmlFileName())
+		}
 
-	module.Library.deps(ctx)
+		// Only add the deps for the library if it is actually going to be built.
+		module.Library.deps(ctx)
+	}
+}
+
+func (module *SdkLibrary) OutputFiles(tag string) (android.Paths, error) {
+	paths, err := module.commonOutputFiles(tag)
+	if paths == nil && err == nil {
+		return module.Library.OutputFiles(tag)
+	} else {
+		return paths, err
+	}
 }
 
 func (module *SdkLibrary) GenerateAndroidBuildActions(ctx android.ModuleContext) {
-	// Don't build an implementation library if this is api only.
-	if !proptools.Bool(module.sdkLibraryProperties.Api_only) {
+	// Only build an implementation library if required.
+	if module.requiresRuntimeImplementationLibrary() {
 		module.Library.GenerateAndroidBuildActions(ctx)
 	}
 
@@ -679,7 +962,7 @@
 		// Extract information from any of the scope specific dependencies.
 		if scopeTag, ok := tag.(scopeDependencyTag); ok {
 			apiScope := scopeTag.apiScope
-			scopePaths := module.getScopePaths(apiScope)
+			scopePaths := module.getScopePathsCreateIfNeeded(apiScope)
 
 			// Extract information from the dependency. The exact information extracted
 			// is determined by the nature of the dependency which is determined by the tag.
@@ -689,7 +972,7 @@
 }
 
 func (module *SdkLibrary) AndroidMkEntries() []android.AndroidMkEntries {
-	if proptools.Bool(module.sdkLibraryProperties.Api_only) {
+	if !module.requiresRuntimeImplementationLibrary() {
 		return nil
 	}
 	entriesList := module.Library.AndroidMkEntries()
@@ -747,21 +1030,17 @@
 // Creates a static java library that has API stubs
 func (module *SdkLibrary) createStubsLibrary(mctx android.DefaultableHookContext, apiScope *apiScope) {
 	props := struct {
-		Name                *string
-		Visibility          []string
-		Srcs                []string
-		Installable         *bool
-		Sdk_version         *string
-		System_modules      *string
-		Patch_module        *string
-		Libs                []string
-		Soc_specific        *bool
-		Device_specific     *bool
-		Product_specific    *bool
-		System_ext_specific *bool
-		Compile_dex         *bool
-		Java_version        *string
-		Product_variables   struct {
+		Name              *string
+		Visibility        []string
+		Srcs              []string
+		Installable       *bool
+		Sdk_version       *string
+		System_modules    *string
+		Patch_module      *string
+		Libs              []string
+		Compile_dex       *bool
+		Java_version      *string
+		Product_variables struct {
 			Pdk struct {
 				Enabled *bool
 			}
@@ -789,27 +1068,18 @@
 	props.Srcs = []string{":" + module.stubsSourceModuleName(apiScope)}
 	sdkVersion := module.sdkVersionForStubsLibrary(mctx, apiScope)
 	props.Sdk_version = proptools.StringPtr(sdkVersion)
-	props.System_modules = module.Library.Module.deviceProperties.System_modules
-	props.Patch_module = module.Library.Module.properties.Patch_module
+	props.System_modules = module.deviceProperties.System_modules
+	props.Patch_module = module.properties.Patch_module
 	props.Installable = proptools.BoolPtr(false)
 	props.Libs = module.sdkLibraryProperties.Stub_only_libs
 	props.Product_variables.Pdk.Enabled = proptools.BoolPtr(false)
-	props.Openjdk9.Srcs = module.Library.Module.properties.Openjdk9.Srcs
-	props.Openjdk9.Javacflags = module.Library.Module.properties.Openjdk9.Javacflags
-	props.Java_version = module.Library.Module.properties.Java_version
-	if module.Library.Module.deviceProperties.Compile_dex != nil {
-		props.Compile_dex = module.Library.Module.deviceProperties.Compile_dex
+	props.Openjdk9.Srcs = module.properties.Openjdk9.Srcs
+	props.Openjdk9.Javacflags = module.properties.Openjdk9.Javacflags
+	props.Java_version = module.properties.Java_version
+	if module.deviceProperties.Compile_dex != nil {
+		props.Compile_dex = module.deviceProperties.Compile_dex
 	}
 
-	if module.SocSpecific() {
-		props.Soc_specific = proptools.BoolPtr(true)
-	} else if module.DeviceSpecific() {
-		props.Device_specific = proptools.BoolPtr(true)
-	} else if module.ProductSpecific() {
-		props.Product_specific = proptools.BoolPtr(true)
-	} else if module.SystemExtSpecific() {
-		props.System_ext_specific = proptools.BoolPtr(true)
-	}
 	// Dist the class jar artifact for sdk builds.
 	if !Bool(module.sdkLibraryProperties.No_dist) {
 		props.Dist.Targets = []string{"sdk", "win_sdk"}
@@ -818,7 +1088,7 @@
 		props.Dist.Tag = proptools.StringPtr(".jar")
 	}
 
-	mctx.CreateModule(LibraryFactory, &props)
+	mctx.CreateModule(LibraryFactory, &props, module.sdkComponentPropertiesForChildLibrary())
 }
 
 // Creates a droidstubs module that creates stubs source files from the given full source
@@ -873,17 +1143,17 @@
 	visibility := module.sdkLibraryProperties.Stubs_source_visibility
 	props.Visibility = visibility
 
-	props.Srcs = append(props.Srcs, module.Library.Module.properties.Srcs...)
-	props.Sdk_version = module.Library.Module.deviceProperties.Sdk_version
-	props.System_modules = module.Library.Module.deviceProperties.System_modules
+	props.Srcs = append(props.Srcs, module.properties.Srcs...)
+	props.Sdk_version = module.deviceProperties.Sdk_version
+	props.System_modules = module.deviceProperties.System_modules
 	props.Installable = proptools.BoolPtr(false)
 	// A droiddoc module has only one Libs property and doesn't distinguish between
 	// shared libs and static libs. So we need to add both of these libs to Libs property.
-	props.Libs = module.Library.Module.properties.Libs
-	props.Libs = append(props.Libs, module.Library.Module.properties.Static_libs...)
-	props.Aidl.Include_dirs = module.Library.Module.deviceProperties.Aidl.Include_dirs
-	props.Aidl.Local_include_dirs = module.Library.Module.deviceProperties.Aidl.Local_include_dirs
-	props.Java_version = module.Library.Module.properties.Java_version
+	props.Libs = module.properties.Libs
+	props.Libs = append(props.Libs, module.properties.Static_libs...)
+	props.Aidl.Include_dirs = module.deviceProperties.Aidl.Include_dirs
+	props.Aidl.Local_include_dirs = module.deviceProperties.Aidl.Local_include_dirs
+	props.Java_version = module.properties.Java_version
 
 	props.Merge_annotations_dirs = module.sdkLibraryProperties.Merge_annotations_dirs
 	props.Merge_inclusion_annotations_dirs = module.sdkLibraryProperties.Merge_inclusion_annotations_dirs
@@ -984,29 +1254,15 @@
 // Creates the xml file that publicizes the runtime library
 func (module *SdkLibrary) createXmlFile(mctx android.DefaultableHookContext) {
 	props := struct {
-		Name                *string
-		Lib_name            *string
-		Soc_specific        *bool
-		Device_specific     *bool
-		Product_specific    *bool
-		System_ext_specific *bool
-		Apex_available      []string
+		Name           *string
+		Lib_name       *string
+		Apex_available []string
 	}{
 		Name:           proptools.StringPtr(module.xmlFileName()),
 		Lib_name:       proptools.StringPtr(module.BaseModuleName()),
 		Apex_available: module.ApexProperties.Apex_available,
 	}
 
-	if module.SocSpecific() {
-		props.Soc_specific = proptools.BoolPtr(true)
-	} else if module.DeviceSpecific() {
-		props.Device_specific = proptools.BoolPtr(true)
-	} else if module.ProductSpecific() {
-		props.Product_specific = proptools.BoolPtr(true)
-	} else if module.SystemExtSpecific() {
-		props.System_ext_specific = proptools.BoolPtr(true)
-	}
-
 	mctx.CreateModule(sdkLibraryXmlFactory, &props)
 }
 
@@ -1037,41 +1293,20 @@
 	return android.Paths{jarPath.Path()}
 }
 
-func (module *SdkLibrary) sdkJars(
-	ctx android.BaseModuleContext,
-	sdkVersion sdkSpec,
-	headerJars bool) android.Paths {
+func (module *SdkLibrary) sdkJars(ctx android.BaseModuleContext, sdkVersion sdkSpec, headerJars bool) android.Paths {
 
-	// If a specific numeric version has been requested then use prebuilt versions of the sdk.
-	if sdkVersion.version.isNumbered() {
-		return PrebuiltJars(ctx, module.BaseModuleName(), sdkVersion)
-	} else {
-		if !sdkVersion.specified() {
-			if headerJars {
-				return module.Library.HeaderJars()
-			} else {
-				return module.Library.ImplementationJars()
-			}
-		}
-		var apiScope *apiScope
-		switch sdkVersion.kind {
-		case sdkSystem:
-			apiScope = apiScopeSystem
-		case sdkTest:
-			apiScope = apiScopeTest
-		case sdkPrivate:
-			return module.Library.HeaderJars()
-		default:
-			apiScope = apiScopePublic
-		}
-
-		paths := module.getScopePaths(apiScope)
+	// Check any special cases for java_sdk_library.
+	if !sdkVersion.specified() {
 		if headerJars {
-			return paths.stubsHeaderPath
+			return module.HeaderJars()
 		} else {
-			return paths.stubsImplPath
+			return module.ImplementationJars()
 		}
+	} else if sdkVersion.kind == sdkPrivate {
+		return module.HeaderJars()
 	}
+
+	return module.selectHeaderJarsForSdkVersion(ctx, sdkVersion)
 }
 
 // to satisfy SdkLibraryDependency interface
@@ -1109,7 +1344,7 @@
 		return
 	}
 
-	if len(module.Library.Module.properties.Srcs) == 0 {
+	if len(module.properties.Srcs) == 0 {
 		mctx.PropertyErrorf("srcs", "java_sdk_library must specify srcs")
 		return
 	}
@@ -1175,9 +1410,12 @@
 		module.createStubsLibrary(mctx, scope)
 	}
 
-	if !proptools.Bool(module.sdkLibraryProperties.Api_only) {
-		// for runtime
-		module.createXmlFile(mctx)
+	if module.requiresRuntimeImplementationLibrary() {
+		// Only create an XML permissions file that declares the library as being usable
+		// as a shared library if required.
+		if module.sharedLibrary() {
+			module.createXmlFile(mctx)
+		}
 
 		// record java_sdk_library modules so that they are exported to make
 		javaSdkLibraries := javaSdkLibraries(mctx.Config())
@@ -1190,14 +1428,20 @@
 func (module *SdkLibrary) InitSdkLibraryProperties() {
 	module.AddProperties(
 		&module.sdkLibraryProperties,
-		&module.Library.Module.properties,
-		&module.Library.Module.dexpreoptProperties,
-		&module.Library.Module.deviceProperties,
-		&module.Library.Module.protoProperties,
+		&module.properties,
+		&module.dexpreoptProperties,
+		&module.deviceProperties,
+		&module.protoProperties,
 	)
 
-	module.Library.Module.properties.Installable = proptools.BoolPtr(true)
-	module.Library.Module.deviceProperties.IsSDKLibrary = true
+	module.initSdkLibraryComponent(&module.ModuleBase)
+
+	module.properties.Installable = proptools.BoolPtr(true)
+	module.deviceProperties.IsSDKLibrary = true
+}
+
+func (module *SdkLibrary) requiresRuntimeImplementationLibrary() bool {
+	return !proptools.Bool(module.sdkLibraryProperties.Api_only)
 }
 
 // Defines how to name the individual component modules the sdk library creates.
@@ -1278,6 +1522,18 @@
 	android.AddVisibilityProperty(module, "stubs_source_visibility", &module.sdkLibraryProperties.Stubs_source_visibility)
 
 	module.SetDefaultableHook(func(ctx android.DefaultableHookContext) {
+		// If no implementation is required then it cannot be used as a shared library
+		// either.
+		if !module.requiresRuntimeImplementationLibrary() {
+			// If shared_library has been explicitly set to true then it is incompatible
+			// with api_only: true.
+			if proptools.Bool(module.commonSdkLibraryProperties.Shared_library) {
+				ctx.PropertyErrorf("api_only/shared_library", "inconsistent settings, shared_library and api_only cannot both be true")
+			}
+			// Set shared_library: false.
+			module.commonSdkLibraryProperties.Shared_library = proptools.BoolPtr(false)
+		}
+
 		if module.initCommonAfterDefaultsApplied(ctx) {
 			module.CreateInternalModules(ctx)
 		}
@@ -1302,10 +1558,10 @@
 	Stub_srcs []string `android:"path"`
 
 	// The current.txt
-	Current_api string `android:"path"`
+	Current_api *string `android:"path"`
 
 	// The removed.txt
-	Removed_api string `android:"path"`
+	Removed_api *string `android:"path"`
 }
 
 type sdkLibraryImportProperties struct {
@@ -1415,7 +1671,9 @@
 
 		module.createJavaImportForStubs(mctx, apiScope, scopeProperties)
 
-		module.createPrebuiltStubsSources(mctx, apiScope, scopeProperties)
+		if len(scopeProperties.Stub_srcs) > 0 {
+			module.createPrebuiltStubsSources(mctx, apiScope, scopeProperties)
+		}
 	}
 
 	javaSdkLibraries := javaSdkLibraries(mctx.Config())
@@ -1427,15 +1685,11 @@
 func (module *sdkLibraryImport) createJavaImportForStubs(mctx android.DefaultableHookContext, apiScope *apiScope, scopeProperties *sdkLibraryScopeProperties) {
 	// Creates a java import for the jar with ".stubs" suffix
 	props := struct {
-		Name                *string
-		Soc_specific        *bool
-		Device_specific     *bool
-		Product_specific    *bool
-		System_ext_specific *bool
-		Sdk_version         *string
-		Libs                []string
-		Jars                []string
-		Prefer              *bool
+		Name        *string
+		Sdk_version *string
+		Libs        []string
+		Jars        []string
+		Prefer      *bool
 	}{}
 	props.Name = proptools.StringPtr(module.stubsLibraryModuleName(apiScope))
 	props.Sdk_version = scopeProperties.Sdk_version
@@ -1443,18 +1697,11 @@
 	// scopes to avoid having to duplicate them in each scope.
 	props.Libs = append(module.properties.Libs, scopeProperties.Libs...)
 	props.Jars = scopeProperties.Jars
-	if module.SocSpecific() {
-		props.Soc_specific = proptools.BoolPtr(true)
-	} else if module.DeviceSpecific() {
-		props.Device_specific = proptools.BoolPtr(true)
-	} else if module.ProductSpecific() {
-		props.Product_specific = proptools.BoolPtr(true)
-	} else if module.SystemExtSpecific() {
-		props.System_ext_specific = proptools.BoolPtr(true)
-	}
+
 	// The imports are preferred if the java_sdk_library_import is preferred.
 	props.Prefer = proptools.BoolPtr(module.prebuilt.Prefer())
-	mctx.CreateModule(ImportFactory, &props)
+
+	mctx.CreateModule(ImportFactory, &props, module.sdkComponentPropertiesForChildLibrary())
 }
 
 func (module *sdkLibraryImport) createPrebuiltStubsSources(mctx android.DefaultableHookContext, apiScope *apiScope, scopeProperties *sdkLibraryScopeProperties) {
@@ -1479,45 +1726,48 @@
 
 		// Add dependencies to the prebuilt stubs library
 		ctx.AddVariationDependencies(nil, apiScope.stubsTag, module.stubsLibraryModuleName(apiScope))
+
+		if len(scopeProperties.Stub_srcs) > 0 {
+			// Add dependencies to the prebuilt stubs source library
+			ctx.AddVariationDependencies(nil, apiScope.stubsSourceTag, module.stubsSourceModuleName(apiScope))
+		}
 	}
 }
 
+func (module *sdkLibraryImport) OutputFiles(tag string) (android.Paths, error) {
+	return module.commonOutputFiles(tag)
+}
+
 func (module *sdkLibraryImport) GenerateAndroidBuildActions(ctx android.ModuleContext) {
-	// Record the paths to the prebuilt stubs library.
+	// Record the paths to the prebuilt stubs library and stubs source.
 	ctx.VisitDirectDeps(func(to android.Module) {
 		tag := ctx.OtherModuleDependencyTag(to)
 
-		if lib, ok := to.(Dependency); ok {
-			if scopeTag, ok := tag.(scopeDependencyTag); ok {
-				apiScope := scopeTag.apiScope
-				scopePaths := module.getScopePaths(apiScope)
-				scopePaths.stubsHeaderPath = lib.HeaderJars()
-			}
+		// Extract information from any of the scope specific dependencies.
+		if scopeTag, ok := tag.(scopeDependencyTag); ok {
+			apiScope := scopeTag.apiScope
+			scopePaths := module.getScopePathsCreateIfNeeded(apiScope)
+
+			// Extract information from the dependency. The exact information extracted
+			// is determined by the nature of the dependency which is determined by the tag.
+			scopeTag.extractDepInfo(ctx, to, scopePaths)
 		}
 	})
+
+	// Populate the scope paths with information from the properties.
+	for apiScope, scopeProperties := range module.scopeProperties {
+		if len(scopeProperties.Jars) == 0 {
+			continue
+		}
+
+		paths := module.getScopePathsCreateIfNeeded(apiScope)
+		paths.currentApiFilePath = android.OptionalPathForModuleSrc(ctx, scopeProperties.Current_api)
+		paths.removedApiFilePath = android.OptionalPathForModuleSrc(ctx, scopeProperties.Removed_api)
+	}
 }
 
-func (module *sdkLibraryImport) sdkJars(
-	ctx android.BaseModuleContext,
-	sdkVersion sdkSpec) android.Paths {
-
-	// If a specific numeric version has been requested then use prebuilt versions of the sdk.
-	if sdkVersion.version.isNumbered() {
-		return PrebuiltJars(ctx, module.BaseModuleName(), sdkVersion)
-	}
-
-	var apiScope *apiScope
-	switch sdkVersion.kind {
-	case sdkSystem:
-		apiScope = apiScopeSystem
-	case sdkTest:
-		apiScope = apiScopeTest
-	default:
-		apiScope = apiScopePublic
-	}
-
-	paths := module.getScopePaths(apiScope)
-	return paths.stubsHeaderPath
+func (module *sdkLibraryImport) sdkJars(ctx android.BaseModuleContext, sdkVersion sdkSpec) android.Paths {
+	return module.selectHeaderJarsForSdkVersion(ctx, sdkVersion)
 }
 
 // to satisfy SdkLibraryDependency interface
@@ -1690,21 +1940,25 @@
 
 	s.Scopes = make(map[*apiScope]scopeProperties)
 	for _, apiScope := range allApiScopes {
-		paths := sdk.getScopePaths(apiScope)
+		paths := sdk.findScopePaths(apiScope)
+		if paths == nil {
+			continue
+		}
+
 		jars := paths.stubsImplPath
 		if len(jars) > 0 {
 			properties := scopeProperties{}
 			properties.Jars = jars
 			properties.SdkVersion = sdk.sdkVersionForStubsLibrary(ctx.SdkModuleContext(), apiScope)
-			properties.StubsSrcJar = paths.stubsSrcJar
-			properties.CurrentApiFile = paths.currentApiFilePath
-			properties.RemovedApiFile = paths.removedApiFilePath
+			properties.StubsSrcJar = paths.stubsSrcJar.Path()
+			properties.CurrentApiFile = paths.currentApiFilePath.Path()
+			properties.RemovedApiFile = paths.removedApiFilePath.Path()
 			s.Scopes[apiScope] = properties
 		}
 	}
 
 	s.Libs = sdk.properties.Libs
-	s.Naming_scheme = sdk.commonProperties.Naming_scheme
+	s.Naming_scheme = sdk.commonSdkLibraryProperties.Naming_scheme
 }
 
 func (s *sdkLibrarySdkMemberProperties) AddToPropertySet(ctx android.SdkMemberContext, propertySet android.BpPropertySet) {
diff --git a/java/sdk_test.go b/java/sdk_test.go
index 088db9e..fb86463 100644
--- a/java/sdk_test.go
+++ b/java/sdk_test.go
@@ -83,6 +83,16 @@
 		},
 		{
 
+			name:           "sdk v30",
+			properties:     `sdk_version: "30",`,
+			bootclasspath:  []string{`""`},
+			system:         "sdk_public_30_system_modules",
+			java8classpath: []string{"prebuilts/sdk/30/public/android.jar", "prebuilts/sdk/tools/core-lambda-stubs.jar"},
+			java9classpath: []string{"prebuilts/sdk/30/public/android.jar", "prebuilts/sdk/tools/core-lambda-stubs.jar"},
+			aidl:           "-pprebuilts/sdk/30/public/framework.aidl",
+		},
+		{
+
 			name:           "current",
 			properties:     `sdk_version: "current",`,
 			bootclasspath:  []string{"android_stubs_current", "core-lambda-stubs"},
@@ -110,6 +120,16 @@
 		},
 		{
 
+			name:           "system_30",
+			properties:     `sdk_version: "system_30",`,
+			bootclasspath:  []string{`""`},
+			system:         "sdk_public_30_system_modules",
+			java8classpath: []string{"prebuilts/sdk/30/system/android.jar", "prebuilts/sdk/tools/core-lambda-stubs.jar"},
+			java9classpath: []string{"prebuilts/sdk/30/system/android.jar", "prebuilts/sdk/tools/core-lambda-stubs.jar"},
+			aidl:           "-pprebuilts/sdk/30/public/framework.aidl",
+		},
+		{
+
 			name:           "test_current",
 			properties:     `sdk_version: "test_current",`,
 			bootclasspath:  []string{"android_test_stubs_current", "core-lambda-stubs"},
@@ -176,12 +196,24 @@
 		},
 		{
 
+			name:           "unbundled sdk v30",
+			unbundled:      true,
+			properties:     `sdk_version: "30",`,
+			bootclasspath:  []string{`""`},
+			system:         "sdk_public_30_system_modules",
+			java8classpath: []string{"prebuilts/sdk/30/public/android.jar", "prebuilts/sdk/tools/core-lambda-stubs.jar"},
+			java9classpath: []string{"prebuilts/sdk/30/public/android.jar", "prebuilts/sdk/tools/core-lambda-stubs.jar"},
+			aidl:           "-pprebuilts/sdk/30/public/framework.aidl",
+		},
+		{
+
 			name:           "unbundled current",
 			unbundled:      true,
 			properties:     `sdk_version: "current",`,
 			bootclasspath:  []string{`""`},
-			forces8:        true,
+			system:         "sdk_public_current_system_modules",
 			java8classpath: []string{"prebuilts/sdk/current/public/android.jar", "prebuilts/sdk/tools/core-lambda-stubs.jar"},
+			java9classpath: []string{"prebuilts/sdk/current/public/android.jar", "prebuilts/sdk/tools/core-lambda-stubs.jar"},
 			aidl:           "-pprebuilts/sdk/current/public/framework.aidl",
 		},
 
@@ -189,27 +221,30 @@
 			name:           "pdk default",
 			pdk:            true,
 			bootclasspath:  []string{`""`},
-			forces8:        true,
-			java8classpath: []string{"prebuilts/sdk/29/public/android.jar", "prebuilts/sdk/tools/core-lambda-stubs.jar"},
-			aidl:           "-pprebuilts/sdk/29/public/framework.aidl",
+			system:         "sdk_public_30_system_modules",
+			java8classpath: []string{"prebuilts/sdk/30/public/android.jar", "prebuilts/sdk/tools/core-lambda-stubs.jar"},
+			java9classpath: []string{"prebuilts/sdk/30/public/android.jar", "prebuilts/sdk/tools/core-lambda-stubs.jar"},
+			aidl:           "-pprebuilts/sdk/30/public/framework.aidl",
 		},
 		{
 			name:           "pdk current",
 			pdk:            true,
 			properties:     `sdk_version: "current",`,
 			bootclasspath:  []string{`""`},
-			forces8:        true,
-			java8classpath: []string{"prebuilts/sdk/29/public/android.jar", "prebuilts/sdk/tools/core-lambda-stubs.jar"},
-			aidl:           "-pprebuilts/sdk/29/public/framework.aidl",
+			system:         "sdk_public_30_system_modules",
+			java8classpath: []string{"prebuilts/sdk/30/public/android.jar", "prebuilts/sdk/tools/core-lambda-stubs.jar"},
+			java9classpath: []string{"prebuilts/sdk/30/public/android.jar", "prebuilts/sdk/tools/core-lambda-stubs.jar"},
+			aidl:           "-pprebuilts/sdk/30/public/framework.aidl",
 		},
 		{
 			name:           "pdk 29",
 			pdk:            true,
 			properties:     `sdk_version: "29",`,
 			bootclasspath:  []string{`""`},
-			forces8:        true,
-			java8classpath: []string{"prebuilts/sdk/29/public/android.jar", "prebuilts/sdk/tools/core-lambda-stubs.jar"},
-			aidl:           "-pprebuilts/sdk/29/public/framework.aidl",
+			system:         "sdk_public_30_system_modules",
+			java8classpath: []string{"prebuilts/sdk/30/public/android.jar", "prebuilts/sdk/tools/core-lambda-stubs.jar"},
+			java9classpath: []string{"prebuilts/sdk/30/public/android.jar", "prebuilts/sdk/tools/core-lambda-stubs.jar"},
+			aidl:           "-pprebuilts/sdk/30/public/framework.aidl",
 		},
 		{
 			name:           "module_current",
@@ -292,12 +327,16 @@
 			if testcase.system == "none" {
 				system = "--system=none"
 			} else if testcase.system != "" {
-				system = "--system=" + filepath.Join(buildDir, ".intermediates", testcase.system, "android_common", "system")
+				dir := ""
+				if strings.HasPrefix(testcase.system, "sdk_public_") {
+					dir = "prebuilts/sdk"
+				}
+				system = "--system=" + filepath.Join(buildDir, ".intermediates", dir, testcase.system, "android_common", "system")
 				// The module-relative parts of these paths are hardcoded in system_modules.go:
 				systemDeps = []string{
-					filepath.Join(buildDir, ".intermediates", testcase.system, "android_common", "system", "lib", "modules"),
-					filepath.Join(buildDir, ".intermediates", testcase.system, "android_common", "system", "lib", "jrt-fs.jar"),
-					filepath.Join(buildDir, ".intermediates", testcase.system, "android_common", "system", "release"),
+					filepath.Join(buildDir, ".intermediates", dir, testcase.system, "android_common", "system", "lib", "modules"),
+					filepath.Join(buildDir, ".intermediates", dir, testcase.system, "android_common", "system", "lib", "jrt-fs.jar"),
+					filepath.Join(buildDir, ".intermediates", dir, testcase.system, "android_common", "system", "release"),
 				}
 			}
 
diff --git a/java/testing.go b/java/testing.go
index 53181a0..1967148 100644
--- a/java/testing.go
+++ b/java/testing.go
@@ -55,36 +55,54 @@
 		"assets_a/a":             nil,
 		"assets_b/b":             nil,
 
-		"prebuilts/sdk/14/public/android.jar":         nil,
-		"prebuilts/sdk/14/public/framework.aidl":      nil,
-		"prebuilts/sdk/14/system/android.jar":         nil,
-		"prebuilts/sdk/17/public/android.jar":         nil,
-		"prebuilts/sdk/17/public/framework.aidl":      nil,
-		"prebuilts/sdk/17/system/android.jar":         nil,
-		"prebuilts/sdk/29/public/android.jar":         nil,
-		"prebuilts/sdk/29/public/framework.aidl":      nil,
-		"prebuilts/sdk/29/system/android.jar":         nil,
-		"prebuilts/sdk/29/system/foo.jar":             nil,
-		"prebuilts/sdk/current/core/android.jar":      nil,
-		"prebuilts/sdk/current/public/android.jar":    nil,
-		"prebuilts/sdk/current/public/framework.aidl": nil,
-		"prebuilts/sdk/current/public/core.jar":       nil,
-		"prebuilts/sdk/current/system/android.jar":    nil,
-		"prebuilts/sdk/current/test/android.jar":      nil,
-		"prebuilts/sdk/28/public/api/foo.txt":         nil,
-		"prebuilts/sdk/28/system/api/foo.txt":         nil,
-		"prebuilts/sdk/28/test/api/foo.txt":           nil,
-		"prebuilts/sdk/28/public/api/foo-removed.txt": nil,
-		"prebuilts/sdk/28/system/api/foo-removed.txt": nil,
-		"prebuilts/sdk/28/test/api/foo-removed.txt":   nil,
-		"prebuilts/sdk/28/public/api/bar.txt":         nil,
-		"prebuilts/sdk/28/system/api/bar.txt":         nil,
-		"prebuilts/sdk/28/test/api/bar.txt":           nil,
-		"prebuilts/sdk/28/public/api/bar-removed.txt": nil,
-		"prebuilts/sdk/28/system/api/bar-removed.txt": nil,
-		"prebuilts/sdk/28/test/api/bar-removed.txt":   nil,
-		"prebuilts/sdk/tools/core-lambda-stubs.jar":   nil,
-		"prebuilts/sdk/Android.bp":                    []byte(`prebuilt_apis { name: "sdk", api_dirs: ["14", "28", "current"],}`),
+		"prebuilts/sdk/14/public/android.jar":                      nil,
+		"prebuilts/sdk/14/public/framework.aidl":                   nil,
+		"prebuilts/sdk/14/system/android.jar":                      nil,
+		"prebuilts/sdk/17/public/android.jar":                      nil,
+		"prebuilts/sdk/17/public/framework.aidl":                   nil,
+		"prebuilts/sdk/17/system/android.jar":                      nil,
+		"prebuilts/sdk/29/public/android.jar":                      nil,
+		"prebuilts/sdk/29/public/framework.aidl":                   nil,
+		"prebuilts/sdk/29/system/android.jar":                      nil,
+		"prebuilts/sdk/29/system/foo.jar":                          nil,
+		"prebuilts/sdk/30/public/android.jar":                      nil,
+		"prebuilts/sdk/30/public/framework.aidl":                   nil,
+		"prebuilts/sdk/30/system/android.jar":                      nil,
+		"prebuilts/sdk/30/system/foo.jar":                          nil,
+		"prebuilts/sdk/30/public/core-for-system-modules.jar":      nil,
+		"prebuilts/sdk/current/core/android.jar":                   nil,
+		"prebuilts/sdk/current/public/android.jar":                 nil,
+		"prebuilts/sdk/current/public/framework.aidl":              nil,
+		"prebuilts/sdk/current/public/core.jar":                    nil,
+		"prebuilts/sdk/current/public/core-for-system-modules.jar": nil,
+		"prebuilts/sdk/current/system/android.jar":                 nil,
+		"prebuilts/sdk/current/test/android.jar":                   nil,
+		"prebuilts/sdk/28/public/api/foo.txt":                      nil,
+		"prebuilts/sdk/28/system/api/foo.txt":                      nil,
+		"prebuilts/sdk/28/test/api/foo.txt":                        nil,
+		"prebuilts/sdk/28/public/api/foo-removed.txt":              nil,
+		"prebuilts/sdk/28/system/api/foo-removed.txt":              nil,
+		"prebuilts/sdk/28/test/api/foo-removed.txt":                nil,
+		"prebuilts/sdk/28/public/api/bar.txt":                      nil,
+		"prebuilts/sdk/28/system/api/bar.txt":                      nil,
+		"prebuilts/sdk/28/test/api/bar.txt":                        nil,
+		"prebuilts/sdk/28/public/api/bar-removed.txt":              nil,
+		"prebuilts/sdk/28/system/api/bar-removed.txt":              nil,
+		"prebuilts/sdk/28/test/api/bar-removed.txt":                nil,
+		"prebuilts/sdk/30/public/api/foo.txt":                      nil,
+		"prebuilts/sdk/30/system/api/foo.txt":                      nil,
+		"prebuilts/sdk/30/test/api/foo.txt":                        nil,
+		"prebuilts/sdk/30/public/api/foo-removed.txt":              nil,
+		"prebuilts/sdk/30/system/api/foo-removed.txt":              nil,
+		"prebuilts/sdk/30/test/api/foo-removed.txt":                nil,
+		"prebuilts/sdk/30/public/api/bar.txt":                      nil,
+		"prebuilts/sdk/30/system/api/bar.txt":                      nil,
+		"prebuilts/sdk/30/test/api/bar.txt":                        nil,
+		"prebuilts/sdk/30/public/api/bar-removed.txt":              nil,
+		"prebuilts/sdk/30/system/api/bar-removed.txt":              nil,
+		"prebuilts/sdk/30/test/api/bar-removed.txt":                nil,
+		"prebuilts/sdk/tools/core-lambda-stubs.jar":                nil,
+		"prebuilts/sdk/Android.bp":                                 []byte(`prebuilt_apis { name: "sdk", api_dirs: ["14", "28", "30", "current"],}`),
 
 		"prebuilts/apk/app.apk":        nil,
 		"prebuilts/apk/app_arm.apk":    nil,
diff --git a/sdk/update.go b/sdk/update.go
index 476a4a5..1ba5806 100644
--- a/sdk/update.go
+++ b/sdk/update.go
@@ -350,6 +350,9 @@
 	bp = newGeneratedFile(ctx, "snapshot", "Android.bp")
 	generateBpContents(&bp.generatedContents, bpFile)
 
+	contents := bp.content.String()
+	syntaxCheckSnapshotBpFile(ctx, contents)
+
 	bp.build(pctx, ctx, nil)
 
 	filesToZip := builder.filesToZip
@@ -394,6 +397,36 @@
 	return outputZipFile
 }
 
+// Check the syntax of the generated Android.bp file contents and if they are
+// invalid then log an error with the contents (tagged with line numbers) and the
+// errors that were found so that it is easy to see where the problem lies.
+func syntaxCheckSnapshotBpFile(ctx android.ModuleContext, contents string) {
+	errs := android.CheckBlueprintSyntax(ctx, "Android.bp", contents)
+	if len(errs) != 0 {
+		message := &strings.Builder{}
+		_, _ = fmt.Fprint(message, `errors in generated Android.bp snapshot:
+
+Generated Android.bp contents
+========================================================================
+`)
+		for i, line := range strings.Split(contents, "\n") {
+			_, _ = fmt.Fprintf(message, "%6d:    %s\n", i+1, line)
+		}
+
+		_, _ = fmt.Fprint(message, `
+========================================================================
+
+Errors found:
+`)
+
+		for _, err := range errs {
+			_, _ = fmt.Fprintf(message, "%s\n", err.Error())
+		}
+
+		ctx.ModuleErrorf("%s", message.String())
+	}
+}
+
 func extractCommonProperties(ctx android.ModuleContext, extractor *commonValueExtractor, commonProperties interface{}, inputPropertiesSlice interface{}) {
 	err := extractor.extractCommonProperties(commonProperties, inputPropertiesSlice)
 	if err != nil {
diff --git a/tradefed/autogen.go b/tradefed/autogen.go
index 596284b..be44cac 100644
--- a/tradefed/autogen.go
+++ b/tradefed/autogen.go
@@ -219,31 +219,39 @@
 }
 
 var autogenInstrumentationTest = pctx.StaticRule("autogenInstrumentationTest", blueprint.RuleParams{
-	Command: "${AutoGenTestConfigScript} $out $in ${EmptyTestConfig} $template",
+	Command: "${AutoGenTestConfigScript} $out $in ${EmptyTestConfig} $template ${extraConfigs}",
 	CommandDeps: []string{
 		"${AutoGenTestConfigScript}",
 		"${EmptyTestConfig}",
 		"$template",
 	},
-}, "name", "template")
+}, "name", "template", "extraConfigs")
 
 func AutoGenInstrumentationTestConfig(ctx android.ModuleContext, testConfigProp *string,
-	testConfigTemplateProp *string, manifest android.Path, testSuites []string, autoGenConfig *bool) android.Path {
+	testConfigTemplateProp *string, manifest android.Path, testSuites []string, autoGenConfig *bool, configs []Config) android.Path {
 	path, autogenPath := testConfigPath(ctx, testConfigProp, testSuites, autoGenConfig, testConfigTemplateProp)
+	var configStrings []string
 	if autogenPath != nil {
 		template := "${InstrumentationTestConfigTemplate}"
 		moduleTemplate := getTestConfigTemplate(ctx, testConfigTemplateProp)
 		if moduleTemplate.Valid() {
 			template = moduleTemplate.String()
 		}
+		for _, config := range configs {
+			configStrings = append(configStrings, config.Config())
+		}
+		extraConfigs := strings.Join(configStrings, fmt.Sprintf("\\n%s", test_xml_indent))
+		extraConfigs = fmt.Sprintf("--extra-configs '%s'", extraConfigs)
+
 		ctx.Build(pctx, android.BuildParams{
 			Rule:        autogenInstrumentationTest,
 			Description: "test config",
 			Input:       manifest,
 			Output:      autogenPath,
 			Args: map[string]string{
-				"name":     ctx.ModuleName(),
-				"template": template,
+				"name":         ctx.ModuleName(),
+				"template":     template,
+				"extraConfigs": extraConfigs,
 			},
 		})
 		return autogenPath
diff --git a/ui/build/ninja.go b/ui/build/ninja.go
index 1b13e5d..fa44cb1 100644
--- a/ui/build/ninja.go
+++ b/ui/build/ninja.go
@@ -39,6 +39,7 @@
 	args := []string{
 		"-d", "keepdepfile",
 		"-d", "keeprsp",
+		"-d", "stats",
 		"--frontend_file", fifo,
 	}
 
diff --git a/ui/build/soong.go b/ui/build/soong.go
index 2fbf381..6a12add 100644
--- a/ui/build/soong.go
+++ b/ui/build/soong.go
@@ -119,6 +119,7 @@
 		cmd := Command(ctx, config, "soong "+name,
 			config.PrebuiltBuildTool("ninja"),
 			"-d", "keepdepfile",
+			"-d", "stats",
 			"-o", "usesphonyoutputs=yes",
 			"-o", "preremoveoutputs=yes",
 			"-w", "dupbuild=err",
diff --git a/ui/status/ninja.go b/ui/status/ninja.go
index 9cf2f6a..a11774c 100644
--- a/ui/status/ninja.go
+++ b/ui/status/ninja.go
@@ -174,6 +174,8 @@
 				n.status.Print("warning: " + message)
 			case ninja_frontend.Status_Message_ERROR:
 				n.status.Error(message)
+			case ninja_frontend.Status_Message_DEBUG:
+				n.status.Verbose(message)
 			default:
 				n.status.Print(message)
 			}
diff --git a/ui/status/ninja_frontend/frontend.pb.go b/ui/status/ninja_frontend/frontend.pb.go
index 7c05eed..7ba9de2 100644
--- a/ui/status/ninja_frontend/frontend.pb.go
+++ b/ui/status/ninja_frontend/frontend.pb.go
@@ -3,9 +3,11 @@
 
 package ninja_frontend
 
-import proto "github.com/golang/protobuf/proto"
-import fmt "fmt"
-import math "math"
+import (
+	fmt "fmt"
+	proto "github.com/golang/protobuf/proto"
+	math "math"
+)
 
 // Reference imports to suppress errors if they are not otherwise used.
 var _ = proto.Marshal
@@ -16,7 +18,7 @@
 // is compatible with the proto package it is being compiled against.
 // A compilation error at this line likely means your copy of the
 // proto package needs to be updated.
-const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
+const _ = proto.ProtoPackageIsVersion3 // please upgrade the proto package
 
 type Status_Message_Level int32
 
@@ -24,17 +26,21 @@
 	Status_Message_INFO    Status_Message_Level = 0
 	Status_Message_WARNING Status_Message_Level = 1
 	Status_Message_ERROR   Status_Message_Level = 2
+	Status_Message_DEBUG   Status_Message_Level = 3
 )
 
 var Status_Message_Level_name = map[int32]string{
 	0: "INFO",
 	1: "WARNING",
 	2: "ERROR",
+	3: "DEBUG",
 }
+
 var Status_Message_Level_value = map[string]int32{
 	"INFO":    0,
 	"WARNING": 1,
 	"ERROR":   2,
+	"DEBUG":   3,
 }
 
 func (x Status_Message_Level) Enum() *Status_Message_Level {
@@ -42,9 +48,11 @@
 	*p = x
 	return p
 }
+
 func (x Status_Message_Level) String() string {
 	return proto.EnumName(Status_Message_Level_name, int32(x))
 }
+
 func (x *Status_Message_Level) UnmarshalJSON(data []byte) error {
 	value, err := proto.UnmarshalJSONEnum(Status_Message_Level_value, data, "Status_Message_Level")
 	if err != nil {
@@ -53,8 +61,9 @@
 	*x = Status_Message_Level(value)
 	return nil
 }
+
 func (Status_Message_Level) EnumDescriptor() ([]byte, []int) {
-	return fileDescriptor_frontend_5a49d9b15a642005, []int{0, 5, 0}
+	return fileDescriptor_eca3873955a29cfe, []int{0, 5, 0}
 }
 
 type Status struct {
@@ -73,16 +82,17 @@
 func (m *Status) String() string { return proto.CompactTextString(m) }
 func (*Status) ProtoMessage()    {}
 func (*Status) Descriptor() ([]byte, []int) {
-	return fileDescriptor_frontend_5a49d9b15a642005, []int{0}
+	return fileDescriptor_eca3873955a29cfe, []int{0}
 }
+
 func (m *Status) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_Status.Unmarshal(m, b)
 }
 func (m *Status) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
 	return xxx_messageInfo_Status.Marshal(b, m, deterministic)
 }
-func (dst *Status) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_Status.Merge(dst, src)
+func (m *Status) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Status.Merge(m, src)
 }
 func (m *Status) XXX_Size() int {
 	return xxx_messageInfo_Status.Size(m)
@@ -147,16 +157,17 @@
 func (m *Status_TotalEdges) String() string { return proto.CompactTextString(m) }
 func (*Status_TotalEdges) ProtoMessage()    {}
 func (*Status_TotalEdges) Descriptor() ([]byte, []int) {
-	return fileDescriptor_frontend_5a49d9b15a642005, []int{0, 0}
+	return fileDescriptor_eca3873955a29cfe, []int{0, 0}
 }
+
 func (m *Status_TotalEdges) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_Status_TotalEdges.Unmarshal(m, b)
 }
 func (m *Status_TotalEdges) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
 	return xxx_messageInfo_Status_TotalEdges.Marshal(b, m, deterministic)
 }
-func (dst *Status_TotalEdges) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_Status_TotalEdges.Merge(dst, src)
+func (m *Status_TotalEdges) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Status_TotalEdges.Merge(m, src)
 }
 func (m *Status_TotalEdges) XXX_Size() int {
 	return xxx_messageInfo_Status_TotalEdges.Size(m)
@@ -188,16 +199,17 @@
 func (m *Status_BuildStarted) String() string { return proto.CompactTextString(m) }
 func (*Status_BuildStarted) ProtoMessage()    {}
 func (*Status_BuildStarted) Descriptor() ([]byte, []int) {
-	return fileDescriptor_frontend_5a49d9b15a642005, []int{0, 1}
+	return fileDescriptor_eca3873955a29cfe, []int{0, 1}
 }
+
 func (m *Status_BuildStarted) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_Status_BuildStarted.Unmarshal(m, b)
 }
 func (m *Status_BuildStarted) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
 	return xxx_messageInfo_Status_BuildStarted.Marshal(b, m, deterministic)
 }
-func (dst *Status_BuildStarted) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_Status_BuildStarted.Merge(dst, src)
+func (m *Status_BuildStarted) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Status_BuildStarted.Merge(m, src)
 }
 func (m *Status_BuildStarted) XXX_Size() int {
 	return xxx_messageInfo_Status_BuildStarted.Size(m)
@@ -232,16 +244,17 @@
 func (m *Status_BuildFinished) String() string { return proto.CompactTextString(m) }
 func (*Status_BuildFinished) ProtoMessage()    {}
 func (*Status_BuildFinished) Descriptor() ([]byte, []int) {
-	return fileDescriptor_frontend_5a49d9b15a642005, []int{0, 2}
+	return fileDescriptor_eca3873955a29cfe, []int{0, 2}
 }
+
 func (m *Status_BuildFinished) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_Status_BuildFinished.Unmarshal(m, b)
 }
 func (m *Status_BuildFinished) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
 	return xxx_messageInfo_Status_BuildFinished.Marshal(b, m, deterministic)
 }
-func (dst *Status_BuildFinished) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_Status_BuildFinished.Merge(dst, src)
+func (m *Status_BuildFinished) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Status_BuildFinished.Merge(m, src)
 }
 func (m *Status_BuildFinished) XXX_Size() int {
 	return xxx_messageInfo_Status_BuildFinished.Size(m)
@@ -276,16 +289,17 @@
 func (m *Status_EdgeStarted) String() string { return proto.CompactTextString(m) }
 func (*Status_EdgeStarted) ProtoMessage()    {}
 func (*Status_EdgeStarted) Descriptor() ([]byte, []int) {
-	return fileDescriptor_frontend_5a49d9b15a642005, []int{0, 3}
+	return fileDescriptor_eca3873955a29cfe, []int{0, 3}
 }
+
 func (m *Status_EdgeStarted) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_Status_EdgeStarted.Unmarshal(m, b)
 }
 func (m *Status_EdgeStarted) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
 	return xxx_messageInfo_Status_EdgeStarted.Marshal(b, m, deterministic)
 }
-func (dst *Status_EdgeStarted) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_Status_EdgeStarted.Merge(dst, src)
+func (m *Status_EdgeStarted) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Status_EdgeStarted.Merge(m, src)
 }
 func (m *Status_EdgeStarted) XXX_Size() int {
 	return xxx_messageInfo_Status_EdgeStarted.Size(m)
@@ -353,7 +367,11 @@
 	// Exit status (0 for success).
 	Status *int32 `protobuf:"zigzag32,3,opt,name=status" json:"status,omitempty"`
 	// Edge output, may contain ANSI codes.
-	Output               *string  `protobuf:"bytes,4,opt,name=output" json:"output,omitempty"`
+	Output *string `protobuf:"bytes,4,opt,name=output" json:"output,omitempty"`
+	// Number of milliseconds spent executing in user mode
+	UserTime *uint32 `protobuf:"varint,5,opt,name=user_time,json=userTime" json:"user_time,omitempty"`
+	// Number of milliseconds spent executing in kernel mode
+	SystemTime           *uint32  `protobuf:"varint,6,opt,name=system_time,json=systemTime" json:"system_time,omitempty"`
 	XXX_NoUnkeyedLiteral struct{} `json:"-"`
 	XXX_unrecognized     []byte   `json:"-"`
 	XXX_sizecache        int32    `json:"-"`
@@ -363,16 +381,17 @@
 func (m *Status_EdgeFinished) String() string { return proto.CompactTextString(m) }
 func (*Status_EdgeFinished) ProtoMessage()    {}
 func (*Status_EdgeFinished) Descriptor() ([]byte, []int) {
-	return fileDescriptor_frontend_5a49d9b15a642005, []int{0, 4}
+	return fileDescriptor_eca3873955a29cfe, []int{0, 4}
 }
+
 func (m *Status_EdgeFinished) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_Status_EdgeFinished.Unmarshal(m, b)
 }
 func (m *Status_EdgeFinished) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
 	return xxx_messageInfo_Status_EdgeFinished.Marshal(b, m, deterministic)
 }
-func (dst *Status_EdgeFinished) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_Status_EdgeFinished.Merge(dst, src)
+func (m *Status_EdgeFinished) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Status_EdgeFinished.Merge(m, src)
 }
 func (m *Status_EdgeFinished) XXX_Size() int {
 	return xxx_messageInfo_Status_EdgeFinished.Size(m)
@@ -411,8 +430,22 @@
 	return ""
 }
 
+func (m *Status_EdgeFinished) GetUserTime() uint32 {
+	if m != nil && m.UserTime != nil {
+		return *m.UserTime
+	}
+	return 0
+}
+
+func (m *Status_EdgeFinished) GetSystemTime() uint32 {
+	if m != nil && m.SystemTime != nil {
+		return *m.SystemTime
+	}
+	return 0
+}
+
 type Status_Message struct {
-	// Message priority level (INFO, WARNING, or ERROR).
+	// Message priority level (DEBUG, INFO, WARNING, ERROR).
 	Level *Status_Message_Level `protobuf:"varint,1,opt,name=level,enum=ninja.Status_Message_Level,def=0" json:"level,omitempty"`
 	// Info/warning/error message from Ninja.
 	Message              *string  `protobuf:"bytes,2,opt,name=message" json:"message,omitempty"`
@@ -425,16 +458,17 @@
 func (m *Status_Message) String() string { return proto.CompactTextString(m) }
 func (*Status_Message) ProtoMessage()    {}
 func (*Status_Message) Descriptor() ([]byte, []int) {
-	return fileDescriptor_frontend_5a49d9b15a642005, []int{0, 5}
+	return fileDescriptor_eca3873955a29cfe, []int{0, 5}
 }
+
 func (m *Status_Message) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_Status_Message.Unmarshal(m, b)
 }
 func (m *Status_Message) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
 	return xxx_messageInfo_Status_Message.Marshal(b, m, deterministic)
 }
-func (dst *Status_Message) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_Status_Message.Merge(dst, src)
+func (m *Status_Message) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Status_Message.Merge(m, src)
 }
 func (m *Status_Message) XXX_Size() int {
 	return xxx_messageInfo_Status_Message.Size(m)
@@ -462,6 +496,7 @@
 }
 
 func init() {
+	proto.RegisterEnum("ninja.Status_Message_Level", Status_Message_Level_name, Status_Message_Level_value)
 	proto.RegisterType((*Status)(nil), "ninja.Status")
 	proto.RegisterType((*Status_TotalEdges)(nil), "ninja.Status.TotalEdges")
 	proto.RegisterType((*Status_BuildStarted)(nil), "ninja.Status.BuildStarted")
@@ -469,42 +504,46 @@
 	proto.RegisterType((*Status_EdgeStarted)(nil), "ninja.Status.EdgeStarted")
 	proto.RegisterType((*Status_EdgeFinished)(nil), "ninja.Status.EdgeFinished")
 	proto.RegisterType((*Status_Message)(nil), "ninja.Status.Message")
-	proto.RegisterEnum("ninja.Status_Message_Level", Status_Message_Level_name, Status_Message_Level_value)
 }
 
-func init() { proto.RegisterFile("frontend.proto", fileDescriptor_frontend_5a49d9b15a642005) }
+func init() {
+	proto.RegisterFile("frontend.proto", fileDescriptor_eca3873955a29cfe)
+}
 
-var fileDescriptor_frontend_5a49d9b15a642005 = []byte{
-	// 496 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x6c, 0x53, 0xd1, 0x6e, 0xd3, 0x30,
-	0x14, 0xa5, 0x69, 0xd3, 0x34, 0x37, 0x6d, 0x28, 0x96, 0x40, 0x59, 0x10, 0xa2, 0xda, 0xd3, 0x78,
-	0x20, 0x48, 0xbc, 0x20, 0x10, 0x12, 0xa2, 0xd2, 0x06, 0x43, 0xd0, 0x49, 0xde, 0x24, 0x24, 0x5e,
-	0xaa, 0x74, 0xf6, 0x86, 0x51, 0xe2, 0x54, 0xb1, 0xbb, 0x5f, 0xe0, 0x7f, 0x78, 0xe0, 0xfb, 0x90,
-	0xaf, 0xed, 0x2c, 0x65, 0x7b, 0xcb, 0xf1, 0x3d, 0xe7, 0xde, 0x73, 0x8f, 0x1d, 0x48, 0xaf, 0xda,
-	0x46, 0x6a, 0x2e, 0x59, 0xb1, 0x6d, 0x1b, 0xdd, 0x90, 0x50, 0x0a, 0xf9, 0xab, 0x3c, 0xfc, 0x13,
-	0xc1, 0xf8, 0x5c, 0x97, 0x7a, 0xa7, 0xc8, 0x5b, 0x48, 0x74, 0xa3, 0xcb, 0x6a, 0xcd, 0xd9, 0x35,
-	0x57, 0xd9, 0x60, 0x31, 0x38, 0x4a, 0x5e, 0x67, 0x05, 0xf2, 0x0a, 0xcb, 0x29, 0x2e, 0x0c, 0xe1,
-	0xd8, 0xd4, 0x29, 0xe8, 0xee, 0x9b, 0x7c, 0x80, 0xd9, 0x66, 0x27, 0x2a, 0xb6, 0x56, 0xba, 0x6c,
-	0x35, 0x67, 0x59, 0x80, 0xe2, 0x7c, 0x5f, 0xbc, 0x34, 0x94, 0x73, 0xcb, 0xa0, 0xd3, 0x4d, 0x0f,
-	0x91, 0x25, 0xa4, 0xb6, 0xc1, 0x95, 0x90, 0x42, 0xfd, 0xe4, 0x2c, 0x1b, 0x62, 0x87, 0xa7, 0xf7,
-	0x74, 0x38, 0x71, 0x14, 0x6a, 0x67, 0x7a, 0x48, 0xde, 0xc3, 0xd4, 0x38, 0xef, 0x3c, 0x8c, 0xb0,
-	0xc3, 0xc1, 0x7e, 0x07, 0xe3, 0xd7, 0x5b, 0x48, 0xf8, 0x2d, 0x30, 0x2b, 0xa0, 0xba, 0x33, 0x10,
-	0xde, 0xb7, 0x82, 0x91, 0x77, 0xf3, 0x71, 0x5c, 0x37, 0xfe, 0x15, 0x44, 0x35, 0x57, 0xaa, 0xbc,
-	0xe6, 0xd9, 0x18, 0xa5, 0x8f, 0xf7, 0xa5, 0xdf, 0x6c, 0x91, 0x7a, 0x56, 0xfe, 0x12, 0xe0, 0x36,
-	0x4e, 0xf2, 0xfc, 0x6e, 0xfa, 0xb3, 0x7e, 0xc6, 0xf9, 0x17, 0x98, 0xf6, 0x03, 0x24, 0x0b, 0x48,
-	0xb6, 0x65, 0x5b, 0x56, 0x15, 0xaf, 0x84, 0xaa, 0x9d, 0xa0, 0x7f, 0x44, 0x32, 0x88, 0x6e, 0x78,
-	0xbb, 0x69, 0x14, 0xc7, 0xfb, 0x98, 0x50, 0x0f, 0xf3, 0x87, 0x30, 0xdb, 0x8b, 0x32, 0xff, 0x3b,
-	0x80, 0xa4, 0x17, 0x0d, 0x49, 0x21, 0x10, 0xcc, 0xf5, 0x0c, 0x04, 0x23, 0xcf, 0x00, 0x30, 0xd6,
-	0xb5, 0x16, 0xb5, 0xed, 0x36, 0xa3, 0x31, 0x9e, 0x5c, 0x88, 0x9a, 0x93, 0x27, 0x30, 0x16, 0x72,
-	0xbb, 0xd3, 0x2a, 0x1b, 0x2e, 0x86, 0x47, 0x31, 0x75, 0xc8, 0x38, 0x68, 0x76, 0x1a, 0x0b, 0x23,
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+var fileDescriptor_eca3873955a29cfe = []byte{
+	// 539 bytes of a gzipped FileDescriptorProto
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 }
diff --git a/ui/status/ninja_frontend/frontend.proto b/ui/status/ninja_frontend/frontend.proto
index 13fd535..baa0046 100644
--- a/ui/status/ninja_frontend/frontend.proto
+++ b/ui/status/ninja_frontend/frontend.proto
@@ -61,6 +61,10 @@
     optional sint32 status = 3;
     // Edge output, may contain ANSI codes.
     optional string output = 4;
+    // Number of milliseconds spent executing in user mode
+    optional uint32 user_time = 5;
+    // Number of milliseconds spent executing in kernel mode
+    optional uint32 system_time = 6;
   }
 
   message Message {
@@ -68,8 +72,9 @@
       INFO = 0;
       WARNING = 1;
       ERROR = 2;
+      DEBUG = 3;
     }
-    // Message priority level (INFO, WARNING, or ERROR).
+    // Message priority level (DEBUG, INFO, WARNING, ERROR).
     optional Level level = 1 [default = INFO];
     // Info/warning/error message from Ninja.
     optional string message = 2;