Merge "Turn off dex actions for sourceless modules."
diff --git a/android/config.go b/android/config.go
index 15e2ad4..a18feb6 100644
--- a/android/config.go
+++ b/android/config.go
@@ -288,6 +288,10 @@
 
 	config.BuildOsVariant = config.Targets[BuildOs][0].String()
 	config.BuildOsCommonVariant = getCommonTargets(config.Targets[BuildOs])[0].String()
+	config.TestProductVariables.DeviceArch = proptools.StringPtr("arm64")
+	config.TestProductVariables.DeviceArchVariant = proptools.StringPtr("armv8-a")
+	config.TestProductVariables.DeviceSecondaryArch = proptools.StringPtr("arm")
+	config.TestProductVariables.DeviceSecondaryArchVariant = proptools.StringPtr("armv7-a-neon")
 
 	return testConfig
 }
@@ -1100,3 +1104,23 @@
 func (c *config) ProductCompatibleProperty() bool {
 	return Bool(c.productVariables.ProductCompatibleProperty)
 }
+
+func (c *deviceConfig) BoardVndkRuntimeDisable() bool {
+	return Bool(c.config.productVariables.BoardVndkRuntimeDisable)
+}
+
+func (c *deviceConfig) DeviceArch() string {
+	return String(c.config.productVariables.DeviceArch)
+}
+
+func (c *deviceConfig) DeviceArchVariant() string {
+	return String(c.config.productVariables.DeviceArchVariant)
+}
+
+func (c *deviceConfig) DeviceSecondaryArch() string {
+	return String(c.config.productVariables.DeviceSecondaryArch)
+}
+
+func (c *deviceConfig) DeviceSecondaryArchVariant() string {
+	return String(c.config.productVariables.DeviceSecondaryArchVariant)
+}
diff --git a/android/mutator.go b/android/mutator.go
index 45954d3..085c055 100644
--- a/android/mutator.go
+++ b/android/mutator.go
@@ -77,7 +77,6 @@
 	RegisterNamespaceMutator,
 	RegisterPrebuiltsPreArchMutators,
 	RegisterDefaultsPreArchMutators,
-	RegisterOverridePreArchMutators,
 	registerVisibilityRuleGatherer,
 }
 
@@ -95,6 +94,7 @@
 	RegisterPrebuiltsPostDepsMutators,
 	registerVisibilityRuleEnforcer,
 	registerNeverallowMutator,
+	RegisterOverridePostDepsMutators,
 }
 
 func PreArchMutators(f RegisterMutatorFunc) {
diff --git a/android/onceper.go b/android/onceper.go
index 5ad17fa..ff865c2 100644
--- a/android/onceper.go
+++ b/android/onceper.go
@@ -40,7 +40,8 @@
 }
 
 // Once computes a value the first time it is called with a given key per OncePer, and returns the
-// value without recomputing when called with the same key.  key must be hashable.
+// value without recomputing when called with the same key.  key must be hashable.  If value panics
+// the panic will be propagated but the next call to Once with the same key will return nil.
 func (once *OncePer) Once(key OnceKey, value func() interface{}) interface{} {
 	// Fast path: check if the key is already in the map
 	if v, ok := once.values.Load(key); ok {
@@ -54,10 +55,15 @@
 		return once.maybeWaitFor(key, v)
 	}
 
-	// The waiter is inserted, call the value constructor, store it, and signal the waiter
-	v := value()
-	once.values.Store(key, v)
-	close(waiter)
+	// The waiter is inserted, call the value constructor, store it, and signal the waiter.  Use defer in case
+	// the function panics.
+	var v interface{}
+	defer func() {
+		once.values.Store(key, v)
+		close(waiter)
+	}()
+
+	v = value()
 
 	return v
 }
diff --git a/android/onceper_test.go b/android/onceper_test.go
index 95303ba..1a55ff4 100644
--- a/android/onceper_test.go
+++ b/android/onceper_test.go
@@ -175,3 +175,43 @@
 		t.Errorf(`reentrant Once should return "a": %q`, a)
 	}
 }
+
+// Test that a recovered panic in a Once function doesn't deadlock
+func TestOncePerPanic(t *testing.T) {
+	once := OncePer{}
+	key := NewOnceKey("key")
+
+	ch := make(chan interface{})
+
+	var a interface{}
+
+	go func() {
+		defer func() {
+			ch <- recover()
+		}()
+
+		a = once.Once(key, func() interface{} {
+			panic("foo")
+		})
+	}()
+
+	p := <-ch
+
+	if p.(string) != "foo" {
+		t.Errorf(`expected panic with "foo", got %#v`, p)
+	}
+
+	if a != nil {
+		t.Errorf(`expected a to be nil, got %#v`, a)
+	}
+
+	// If the call to Once that panicked leaves the key in a bad state this will deadlock
+	b := once.Once(key, func() interface{} {
+		return "bar"
+	})
+
+	// The second call to Once should return nil inserted by the first call that panicked.
+	if b != nil {
+		t.Errorf(`expected b to be nil, got %#v`, b)
+	}
+}
diff --git a/android/override_module.go b/android/override_module.go
index 119bca1..5a57c93 100644
--- a/android/override_module.go
+++ b/android/override_module.go
@@ -84,8 +84,13 @@
 	getOverrides() []OverrideModule
 
 	override(ctx BaseModuleContext, o OverrideModule)
+	getOverriddenBy() string
 
 	setOverridesProperty(overridesProperties *[]string)
+
+	// Due to complications with incoming dependencies, overrides are processed after DepsMutator.
+	// So, overridable properties need to be handled in a separate, dedicated deps mutator.
+	OverridablePropertiesDepsMutator(ctx BottomUpMutatorContext)
 }
 
 // Base module struct for overridable module types
@@ -106,6 +111,8 @@
 	// set this to a pointer to the property through the InitOverridableModule function, so that
 	// override information is propagated and aggregated correctly.
 	overridesProperty *[]string
+
+	overriddenBy string
 }
 
 func InitOverridableModule(m OverridableModule, overridesProperty *[]string) {
@@ -153,14 +160,23 @@
 			}
 		}
 	}
+	b.overriddenBy = o.Name()
+}
+
+func (b *OverridableModuleBase) getOverriddenBy() string {
+	return b.overriddenBy
+}
+
+func (b *OverridableModuleBase) OverridablePropertiesDepsMutator(ctx BottomUpMutatorContext) {
 }
 
 // Mutators for override/overridable modules. All the fun happens in these functions. It is critical
 // to keep them in this order and not put any order mutators between them.
-func RegisterOverridePreArchMutators(ctx RegisterMutatorsContext) {
+func RegisterOverridePostDepsMutators(ctx RegisterMutatorsContext) {
 	ctx.BottomUp("override_deps", overrideModuleDepsMutator).Parallel()
 	ctx.TopDown("register_override", registerOverrideMutator).Parallel()
 	ctx.BottomUp("perform_override", performOverrideMutator).Parallel()
+	ctx.BottomUp("overridable_deps", overridableModuleDepsMutator).Parallel()
 }
 
 type overrideBaseDependencyTag struct {
@@ -207,5 +223,22 @@
 		for i, o := range overrides {
 			mods[i+1].(OverridableModule).override(ctx, o)
 		}
+	} else if o, ok := ctx.Module().(OverrideModule); ok {
+		// Create a variant of the overriding module with its own name. This matches the above local
+		// variant name rule for overridden modules, and thus allows ReplaceDependencies to match the
+		// two.
+		ctx.CreateLocalVariations(o.Name())
+	}
+}
+
+func overridableModuleDepsMutator(ctx BottomUpMutatorContext) {
+	if b, ok := ctx.Module().(OverridableModule); ok {
+		if o := b.getOverriddenBy(); o != "" {
+			// Redirect dependencies on the overriding module to this overridden module. Overriding
+			// modules are basically pseudo modules, and all build actions are associated to overridden
+			// modules. Therefore, dependencies on overriding modules need to be forwarded there as well.
+			ctx.ReplaceDependencies(o)
+		}
+		b.OverridablePropertiesDepsMutator(ctx)
 	}
 }
diff --git a/android/prebuilt_etc.go b/android/prebuilt_etc.go
index bec24c7..b13ce2a 100644
--- a/android/prebuilt_etc.go
+++ b/android/prebuilt_etc.go
@@ -23,6 +23,7 @@
 	RegisterModuleType("prebuilt_etc_host", PrebuiltEtcHostFactory)
 	RegisterModuleType("prebuilt_usr_share", PrebuiltUserShareFactory)
 	RegisterModuleType("prebuilt_usr_share_host", PrebuiltUserShareHostFactory)
+	RegisterModuleType("prebuilt_font", PrebuiltFontFactory)
 
 	PreDepsMutators(func(ctx RegisterMutatorsContext) {
 		ctx.BottomUp("prebuilt_etc", prebuiltEtcMutator).Parallel()
@@ -240,3 +241,12 @@
 		}
 	}
 }
+
+// prebuilt_font installs a font in <partition>/fonts directory.
+func PrebuiltFontFactory() Module {
+	module := &PrebuiltEtc{installDirBase: "fonts"}
+	InitPrebuiltEtcModule(module)
+	// This module is device-only
+	InitAndroidArchModule(module, DeviceSupported, MultilibFirst)
+	return module
+}
diff --git a/android/prebuilt_etc_test.go b/android/prebuilt_etc_test.go
index 08700ae..a5c4480 100644
--- a/android/prebuilt_etc_test.go
+++ b/android/prebuilt_etc_test.go
@@ -30,6 +30,7 @@
 	ctx.RegisterModuleType("prebuilt_etc_host", ModuleFactoryAdaptor(PrebuiltEtcHostFactory))
 	ctx.RegisterModuleType("prebuilt_usr_share", ModuleFactoryAdaptor(PrebuiltUserShareFactory))
 	ctx.RegisterModuleType("prebuilt_usr_share_host", ModuleFactoryAdaptor(PrebuiltUserShareHostFactory))
+	ctx.RegisterModuleType("prebuilt_font", ModuleFactoryAdaptor(PrebuiltFontFactory))
 	ctx.PreDepsMutators(func(ctx RegisterMutatorsContext) {
 		ctx.BottomUp("prebuilt_etc", prebuiltEtcMutator).Parallel()
 	})
@@ -219,3 +220,18 @@
 		t.Errorf("expected %q, got %q", expected, p.installDirPath.RelPathString())
 	}
 }
+
+func TestPrebuiltFontInstallDirPath(t *testing.T) {
+	ctx, _ := testPrebuiltEtc(t, `
+		prebuilt_font {
+			name: "foo.conf",
+			src: "foo.conf",
+		}
+	`)
+
+	p := ctx.ModuleForTests("foo.conf", "android_arm64_armv8-a_core").Module().(*PrebuiltEtc)
+	expected := "target/product/test_device/system/fonts"
+	if p.installDirPath.RelPathString() != expected {
+		t.Errorf("expected %q, got %q", expected, p.installDirPath.RelPathString())
+	}
+}
diff --git a/android/util.go b/android/util.go
index f9dce6f..f7a3437 100644
--- a/android/util.go
+++ b/android/util.go
@@ -52,6 +52,31 @@
 	return string(ret)
 }
 
+func JoinWithSuffix(strs []string, suffix string, separator string) string {
+	if len(strs) == 0 {
+		return ""
+	}
+
+	if len(strs) == 1 {
+		return strs[0] + suffix
+	}
+
+	n := len(" ") * (len(strs) - 1)
+	for _, s := range strs {
+		n += len(suffix) + len(s)
+	}
+
+	ret := make([]byte, 0, n)
+	for i, s := range strs {
+		if i != 0 {
+			ret = append(ret, separator...)
+		}
+		ret = append(ret, s...)
+		ret = append(ret, suffix...)
+	}
+	return string(ret)
+}
+
 func sortedKeys(m map[string][]string) []string {
 	s := make([]string, 0, len(m))
 	for k := range m {
diff --git a/android/variable.go b/android/variable.go
index c500671..ff3ebaf 100644
--- a/android/variable.go
+++ b/android/variable.go
@@ -279,6 +279,8 @@
 	BoardPlatPrivateSepolicyDirs []string `json:",omitempty"`
 	BoardSepolicyM4Defs          []string `json:",omitempty"`
 
+	BoardVndkRuntimeDisable *bool `json:",omitempty"`
+
 	VendorVars map[string]map[string]string `json:",omitempty"`
 
 	Ndk_abis               *bool `json:",omitempty"`
diff --git a/cc/cc.go b/cc/cc.go
index eaf41d8..a3b9a92 100644
--- a/cc/cc.go
+++ b/cc/cc.go
@@ -1011,7 +1011,7 @@
 		}
 	}
 
-	if c.installer != nil && !c.Properties.PreventInstall && c.IsForPlatform() && c.outputFile.Valid() {
+	if c.installable() {
 		c.installer.install(ctx, c.outputFile.Path())
 		if ctx.Failed() {
 			return
@@ -1968,6 +1968,10 @@
 	return false
 }
 
+func (c *Module) installable() bool {
+	return c.installer != nil && !c.Properties.PreventInstall && c.IsForPlatform() && c.outputFile.Valid()
+}
+
 func (c *Module) imageVariation() string {
 	variation := "core"
 	if c.useVndk() {
diff --git a/cc/cc_test.go b/cc/cc_test.go
index f3d5e60..36d8aa4 100644
--- a/cc/cc_test.go
+++ b/cc/cc_test.go
@@ -20,6 +20,7 @@
 	"fmt"
 	"io/ioutil"
 	"os"
+	"path/filepath"
 	"reflect"
 	"sort"
 	"strings"
@@ -75,6 +76,7 @@
 	ctx.PostDepsMutators(func(ctx android.RegisterMutatorsContext) {
 		ctx.TopDown("double_loadable", checkDoubleLoadableLibraries).Parallel()
 	})
+	ctx.RegisterSingletonType("vndk-snapshot", android.SingletonFactoryAdaptor(VndkSnapshotSingleton))
 	ctx.Register()
 
 	// add some modules that are required by the compiler and/or linker
@@ -286,8 +288,28 @@
 	}
 }
 
+func checkVndkSnapshot(t *testing.T, ctx *android.TestContext, name, subDir, variant string) {
+	vndkSnapshot := ctx.SingletonForTests("vndk-snapshot")
+
+	snapshotPath := filepath.Join(subDir, name+".so")
+	mod := ctx.ModuleForTests(name, variant).Module().(*Module)
+	if !mod.outputFile.Valid() {
+		t.Errorf("%q must have output\n", name)
+		return
+	}
+
+	out := vndkSnapshot.Output(snapshotPath)
+	if out.Input != mod.outputFile.Path() {
+		t.Errorf("The input of VNDK snapshot must be %q, but %q", out.Input.String(), mod.outputFile.String())
+	}
+}
+
 func TestVndk(t *testing.T) {
-	ctx := testCc(t, `
+	config := android.TestArchConfig(buildDir, nil)
+	config.TestProductVariables.DeviceVndkVersion = StringPtr("current")
+	config.TestProductVariables.Platform_vndk_version = StringPtr("VER")
+
+	ctx := testCcWithConfig(t, `
 		cc_library {
 			name: "libvndk",
 			vendor_available: true,
@@ -325,12 +347,35 @@
 			},
 			nocrt: true,
 		}
-	`)
+	`, config)
 
 	checkVndkModule(t, ctx, "libvndk", "vndk-VER", false, "")
 	checkVndkModule(t, ctx, "libvndk_private", "vndk-VER", false, "")
 	checkVndkModule(t, ctx, "libvndk_sp", "vndk-sp-VER", true, "")
 	checkVndkModule(t, ctx, "libvndk_sp_private", "vndk-sp-VER", true, "")
+
+	// Check VNDK snapshot output.
+
+	snapshotDir := "vndk-snapshot"
+	snapshotVariantPath := filepath.Join(buildDir, snapshotDir, "arm64")
+
+	vndkLibPath := filepath.Join(snapshotVariantPath, fmt.Sprintf("arch-%s-%s",
+		"arm64", "armv8-a"))
+	vndkLib2ndPath := filepath.Join(snapshotVariantPath, fmt.Sprintf("arch-%s-%s",
+		"arm", "armv7-a-neon"))
+
+	vndkCoreLibPath := filepath.Join(vndkLibPath, "shared", "vndk-core")
+	vndkSpLibPath := filepath.Join(vndkLibPath, "shared", "vndk-sp")
+	vndkCoreLib2ndPath := filepath.Join(vndkLib2ndPath, "shared", "vndk-core")
+	vndkSpLib2ndPath := filepath.Join(vndkLib2ndPath, "shared", "vndk-sp")
+
+	variant := "android_arm64_armv8-a_vendor_shared"
+	variant2nd := "android_arm_armv7-a-neon_vendor_shared"
+
+	checkVndkSnapshot(t, ctx, "libvndk", vndkCoreLibPath, variant)
+	checkVndkSnapshot(t, ctx, "libvndk", vndkCoreLib2ndPath, variant2nd)
+	checkVndkSnapshot(t, ctx, "libvndk_sp", vndkSpLibPath, variant)
+	checkVndkSnapshot(t, ctx, "libvndk_sp", vndkSpLib2ndPath, variant2nd)
 }
 
 func TestVndkDepError(t *testing.T) {
diff --git a/cc/vndk.go b/cc/vndk.go
index 7859fa2..a1d67af 100644
--- a/cc/vndk.go
+++ b/cc/vndk.go
@@ -16,6 +16,8 @@
 
 import (
 	"errors"
+	"fmt"
+	"path/filepath"
 	"sort"
 	"strings"
 	"sync"
@@ -197,9 +199,20 @@
 	llndkLibrariesKey                = android.NewOnceKey("llndkLibrarires")
 	vndkPrivateLibrariesKey          = android.NewOnceKey("vndkPrivateLibrarires")
 	vndkUsingCoreVariantLibrariesKey = android.NewOnceKey("vndkUsingCoreVariantLibrarires")
+	modulePathsKey                   = android.NewOnceKey("modulePaths")
+	vndkSnapshotOutputsKey           = android.NewOnceKey("vndkSnapshotOutputs")
 	vndkLibrariesLock                sync.Mutex
 )
 
+type vndkSnapshotOutputPaths struct {
+	configs         android.Paths
+	notices         android.Paths
+	vndkCoreLibs    android.Paths
+	vndkCoreLibs2nd android.Paths
+	vndkSpLibs      android.Paths
+	vndkSpLibs2nd   android.Paths
+}
+
 func vndkCoreLibraries(config android.Config) *[]string {
 	return config.Once(vndkCoreLibrariesKey, func() interface{} {
 		return &[]string{}
@@ -230,66 +243,296 @@
 	}).(*[]string)
 }
 
-// gather list of vndk-core, vndk-sp, and ll-ndk libs
-func VndkMutator(mctx android.BottomUpMutatorContext) {
-	if m, ok := mctx.Module().(*Module); ok && m.Enabled() {
-		if lib, ok := m.linker.(*llndkStubDecorator); ok {
-			vndkLibrariesLock.Lock()
-			defer vndkLibrariesLock.Unlock()
+func modulePaths(config android.Config) map[string]string {
+	return config.Once(modulePathsKey, func() interface{} {
+		return make(map[string]string)
+	}).(map[string]string)
+}
 
-			llndkLibraries := llndkLibraries(mctx.Config())
-			vndkPrivateLibraries := vndkPrivateLibraries(mctx.Config())
+func vndkSnapshotOutputs(config android.Config) *vndkSnapshotOutputPaths {
+	return config.Once(vndkSnapshotOutputsKey, func() interface{} {
+		return &vndkSnapshotOutputPaths{}
+	}).(*vndkSnapshotOutputPaths)
+}
 
-			name := strings.TrimSuffix(m.Name(), llndkLibrarySuffix)
-			if !inList(name, *llndkLibraries) {
-				*llndkLibraries = append(*llndkLibraries, name)
-				sort.Strings(*llndkLibraries)
-			}
-			if !Bool(lib.Properties.Vendor_available) {
-				if !inList(name, *vndkPrivateLibraries) {
-					*vndkPrivateLibraries = append(*vndkPrivateLibraries, name)
-					sort.Strings(*vndkPrivateLibraries)
-				}
-			}
-		} else {
-			lib, is_lib := m.linker.(*libraryDecorator)
-			prebuilt_lib, is_prebuilt_lib := m.linker.(*prebuiltLibraryLinker)
-			if (is_lib && lib.shared()) || (is_prebuilt_lib && prebuilt_lib.shared()) {
-				name := strings.TrimPrefix(m.Name(), "prebuilt_")
-				if m.vndkdep.isVndk() && !m.vndkdep.isVndkExt() {
-					vndkLibrariesLock.Lock()
-					defer vndkLibrariesLock.Unlock()
+func processLlndkLibrary(mctx android.BottomUpMutatorContext, m *Module) {
+	lib := m.linker.(*llndkStubDecorator)
+	name := strings.TrimSuffix(m.Name(), llndkLibrarySuffix)
 
-					vndkUsingCoreVariantLibraries := vndkUsingCoreVariantLibraries(mctx.Config())
-					vndkSpLibraries := vndkSpLibraries(mctx.Config())
-					vndkCoreLibraries := vndkCoreLibraries(mctx.Config())
-					vndkPrivateLibraries := vndkPrivateLibraries(mctx.Config())
+	vndkLibrariesLock.Lock()
+	defer vndkLibrariesLock.Unlock()
 
-					if mctx.DeviceConfig().VndkUseCoreVariant() && !inList(name, config.VndkMustUseVendorVariantList) {
-						if !inList(name, *vndkUsingCoreVariantLibraries) {
-							*vndkUsingCoreVariantLibraries = append(*vndkUsingCoreVariantLibraries, name)
-							sort.Strings(*vndkUsingCoreVariantLibraries)
-						}
-					}
-					if m.vndkdep.isVndkSp() {
-						if !inList(name, *vndkSpLibraries) {
-							*vndkSpLibraries = append(*vndkSpLibraries, name)
-							sort.Strings(*vndkSpLibraries)
-						}
-					} else {
-						if !inList(name, *vndkCoreLibraries) {
-							*vndkCoreLibraries = append(*vndkCoreLibraries, name)
-							sort.Strings(*vndkCoreLibraries)
-						}
-					}
-					if !Bool(m.VendorProperties.Vendor_available) {
-						if !inList(name, *vndkPrivateLibraries) {
-							*vndkPrivateLibraries = append(*vndkPrivateLibraries, name)
-							sort.Strings(*vndkPrivateLibraries)
-						}
-					}
-				}
-			}
+	llndkLibraries := llndkLibraries(mctx.Config())
+	if !inList(name, *llndkLibraries) {
+		*llndkLibraries = append(*llndkLibraries, name)
+		sort.Strings(*llndkLibraries)
+	}
+	if !Bool(lib.Properties.Vendor_available) {
+		vndkPrivateLibraries := vndkPrivateLibraries(mctx.Config())
+		if !inList(name, *vndkPrivateLibraries) {
+			*vndkPrivateLibraries = append(*vndkPrivateLibraries, name)
+			sort.Strings(*vndkPrivateLibraries)
 		}
 	}
 }
+
+func processVndkLibrary(mctx android.BottomUpMutatorContext, m *Module) {
+	name := strings.TrimPrefix(m.Name(), "prebuilt_")
+
+	vndkLibrariesLock.Lock()
+	defer vndkLibrariesLock.Unlock()
+
+	modulePaths := modulePaths(mctx.Config())
+	if mctx.DeviceConfig().VndkUseCoreVariant() && !inList(name, config.VndkMustUseVendorVariantList) {
+		vndkUsingCoreVariantLibraries := vndkUsingCoreVariantLibraries(mctx.Config())
+		if !inList(name, *vndkUsingCoreVariantLibraries) {
+			*vndkUsingCoreVariantLibraries = append(*vndkUsingCoreVariantLibraries, name)
+			sort.Strings(*vndkUsingCoreVariantLibraries)
+		}
+	}
+	if m.vndkdep.isVndkSp() {
+		vndkSpLibraries := vndkSpLibraries(mctx.Config())
+		if !inList(name, *vndkSpLibraries) {
+			*vndkSpLibraries = append(*vndkSpLibraries, name)
+			sort.Strings(*vndkSpLibraries)
+			modulePaths[name] = mctx.ModuleDir()
+		}
+	} else {
+		vndkCoreLibraries := vndkCoreLibraries(mctx.Config())
+		if !inList(name, *vndkCoreLibraries) {
+			*vndkCoreLibraries = append(*vndkCoreLibraries, name)
+			sort.Strings(*vndkCoreLibraries)
+			modulePaths[name] = mctx.ModuleDir()
+		}
+	}
+	if !Bool(m.VendorProperties.Vendor_available) {
+		vndkPrivateLibraries := vndkPrivateLibraries(mctx.Config())
+		if !inList(name, *vndkPrivateLibraries) {
+			*vndkPrivateLibraries = append(*vndkPrivateLibraries, name)
+			sort.Strings(*vndkPrivateLibraries)
+		}
+	}
+}
+
+// gather list of vndk-core, vndk-sp, and ll-ndk libs
+func VndkMutator(mctx android.BottomUpMutatorContext) {
+	m, ok := mctx.Module().(*Module)
+	if !ok {
+		return
+	}
+
+	if !m.Enabled() {
+		return
+	}
+
+	if _, ok := m.linker.(*llndkStubDecorator); ok {
+		processLlndkLibrary(mctx, m)
+		return
+	}
+
+	lib, is_lib := m.linker.(*libraryDecorator)
+	prebuilt_lib, is_prebuilt_lib := m.linker.(*prebuiltLibraryLinker)
+
+	if (is_lib && lib.shared()) || (is_prebuilt_lib && prebuilt_lib.shared()) {
+		if m.vndkdep.isVndk() && !m.vndkdep.isVndkExt() {
+			processVndkLibrary(mctx, m)
+			return
+		}
+	}
+}
+
+func init() {
+	android.RegisterSingletonType("vndk-snapshot", VndkSnapshotSingleton)
+	android.RegisterMakeVarsProvider(pctx, func(ctx android.MakeVarsContext) {
+		outputs := vndkSnapshotOutputs(ctx.Config())
+
+		ctx.Strict("SOONG_VNDK_SNAPSHOT_CONFIGS", strings.Join(outputs.configs.Strings(), " "))
+		ctx.Strict("SOONG_VNDK_SNAPSHOT_NOTICES", strings.Join(outputs.notices.Strings(), " "))
+		ctx.Strict("SOONG_VNDK_SNAPSHOT_CORE_LIBS", strings.Join(outputs.vndkCoreLibs.Strings(), " "))
+		ctx.Strict("SOONG_VNDK_SNAPSHOT_SP_LIBS", strings.Join(outputs.vndkSpLibs.Strings(), " "))
+		ctx.Strict("SOONG_VNDK_SNAPSHOT_CORE_LIBS_2ND", strings.Join(outputs.vndkCoreLibs2nd.Strings(), " "))
+		ctx.Strict("SOONG_VNDK_SNAPSHOT_SP_LIBS_2ND", strings.Join(outputs.vndkSpLibs2nd.Strings(), " "))
+	})
+}
+
+func VndkSnapshotSingleton() android.Singleton {
+	return &vndkSnapshotSingleton{}
+}
+
+type vndkSnapshotSingleton struct{}
+
+func installVndkSnapshotLib(ctx android.SingletonContext, name string, module *Module, dir string) android.Path {
+	if !module.outputFile.Valid() {
+		panic(fmt.Errorf("module %s has no outputFile\n", name))
+	}
+
+	out := android.PathForOutput(ctx, dir, name+".so")
+
+	ctx.Build(pctx, android.BuildParams{
+		Rule:        android.Cp,
+		Input:       module.outputFile.Path(),
+		Output:      out,
+		Description: "vndk snapshot " + dir + "/" + name + ".so",
+		Args: map[string]string{
+			"cpFlags": "-f -L",
+		},
+	})
+
+	return out
+}
+
+func (c *vndkSnapshotSingleton) GenerateBuildActions(ctx android.SingletonContext) {
+	// BOARD_VNDK_VERSION must be set to 'current' in order to generate a VNDK snapshot.
+	if ctx.DeviceConfig().VndkVersion() != "current" {
+		return
+	}
+
+	if ctx.DeviceConfig().PlatformVndkVersion() == "" {
+		return
+	}
+
+	if ctx.DeviceConfig().BoardVndkRuntimeDisable() {
+		return
+	}
+
+	outputs := vndkSnapshotOutputs(ctx.Config())
+
+	snapshotDir := "vndk-snapshot"
+
+	var vndkLibPath, vndkLib2ndPath string
+
+	snapshotVariantPath := filepath.Join(snapshotDir, ctx.DeviceConfig().DeviceArch())
+	if ctx.DeviceConfig().BinderBitness() == "32" {
+		vndkLibPath = filepath.Join(snapshotVariantPath, "binder32", fmt.Sprintf(
+			"arch-%s-%s", ctx.DeviceConfig().DeviceArch(), ctx.DeviceConfig().DeviceArchVariant()))
+		vndkLib2ndPath = filepath.Join(snapshotVariantPath, "binder32", fmt.Sprintf(
+			"arch-%s-%s", ctx.DeviceConfig().DeviceSecondaryArch(), ctx.DeviceConfig().DeviceSecondaryArchVariant()))
+	} else {
+		vndkLibPath = filepath.Join(snapshotVariantPath, fmt.Sprintf(
+			"arch-%s-%s", ctx.DeviceConfig().DeviceArch(), ctx.DeviceConfig().DeviceArchVariant()))
+		vndkLib2ndPath = filepath.Join(snapshotVariantPath, fmt.Sprintf(
+			"arch-%s-%s", ctx.DeviceConfig().DeviceSecondaryArch(), ctx.DeviceConfig().DeviceSecondaryArchVariant()))
+	}
+
+	vndkCoreLibPath := filepath.Join(vndkLibPath, "shared", "vndk-core")
+	vndkSpLibPath := filepath.Join(vndkLibPath, "shared", "vndk-sp")
+	vndkCoreLib2ndPath := filepath.Join(vndkLib2ndPath, "shared", "vndk-core")
+	vndkSpLib2ndPath := filepath.Join(vndkLib2ndPath, "shared", "vndk-sp")
+	noticePath := filepath.Join(snapshotVariantPath, "NOTICE_FILES")
+	noticeBuilt := make(map[string]bool)
+
+	tryBuildNotice := func(m *Module) {
+		name := ctx.ModuleName(m)
+
+		if _, ok := noticeBuilt[name]; ok {
+			return
+		}
+
+		noticeBuilt[name] = true
+
+		if m.NoticeFile().Valid() {
+			out := android.PathForOutput(ctx, noticePath, name+".so.txt")
+			ctx.Build(pctx, android.BuildParams{
+				Rule:        android.Cp,
+				Input:       m.NoticeFile().Path(),
+				Output:      out,
+				Description: "vndk snapshot notice " + name + ".so.txt",
+				Args: map[string]string{
+					"cpFlags": "-f -L",
+				},
+			})
+			outputs.notices = append(outputs.notices, out)
+		}
+	}
+
+	vndkCoreLibraries := vndkCoreLibraries(ctx.Config())
+	vndkSpLibraries := vndkSpLibraries(ctx.Config())
+	vndkPrivateLibraries := vndkPrivateLibraries(ctx.Config())
+
+	ctx.VisitAllModules(func(module android.Module) {
+		m, ok := module.(*Module)
+		if !ok || !m.Enabled() || !m.useVndk() || !m.installable() {
+			return
+		}
+
+		lib, is_lib := m.linker.(*libraryDecorator)
+		prebuilt_lib, is_prebuilt_lib := m.linker.(*prebuiltLibraryLinker)
+
+		if !(is_lib && lib.shared()) && !(is_prebuilt_lib && prebuilt_lib.shared()) {
+			return
+		}
+
+		is_2nd := m.Target().Arch.ArchType != ctx.Config().DevicePrimaryArchType()
+
+		name := ctx.ModuleName(module)
+
+		if inList(name, *vndkCoreLibraries) {
+			if is_2nd {
+				out := installVndkSnapshotLib(ctx, name, m, vndkCoreLib2ndPath)
+				outputs.vndkCoreLibs2nd = append(outputs.vndkCoreLibs2nd, out)
+			} else {
+				out := installVndkSnapshotLib(ctx, name, m, vndkCoreLibPath)
+				outputs.vndkCoreLibs = append(outputs.vndkCoreLibs, out)
+			}
+			tryBuildNotice(m)
+		} else if inList(name, *vndkSpLibraries) {
+			if is_2nd {
+				out := installVndkSnapshotLib(ctx, name, m, vndkSpLib2ndPath)
+				outputs.vndkSpLibs2nd = append(outputs.vndkSpLibs2nd, out)
+			} else {
+				out := installVndkSnapshotLib(ctx, name, m, vndkSpLibPath)
+				outputs.vndkSpLibs = append(outputs.vndkSpLibs, out)
+			}
+			tryBuildNotice(m)
+		}
+	})
+
+	configsPath := filepath.Join(snapshotVariantPath, "configs")
+	vndkCoreTxt := android.PathForOutput(ctx, configsPath, "vndkcore.libraries.txt")
+	vndkPrivateTxt := android.PathForOutput(ctx, configsPath, "vndkprivate.libraries.txt")
+	modulePathTxt := android.PathForOutput(ctx, configsPath, "module_paths.txt")
+
+	ctx.Build(pctx, android.BuildParams{
+		Rule:        android.WriteFile,
+		Output:      vndkCoreTxt,
+		Description: "vndk snapshot vndkcore.libraries.txt",
+		Args: map[string]string{
+			"content": android.JoinWithSuffix(*vndkCoreLibraries, ".so", "\\n"),
+		},
+	})
+	outputs.configs = append(outputs.configs, vndkCoreTxt)
+
+	ctx.Build(pctx, android.BuildParams{
+		Rule:        android.WriteFile,
+		Output:      vndkPrivateTxt,
+		Description: "vndk snapshot vndkprivate.libraries.txt",
+		Args: map[string]string{
+			"content": android.JoinWithSuffix(*vndkPrivateLibraries, ".so", "\\n"),
+		},
+	})
+	outputs.configs = append(outputs.configs, vndkPrivateTxt)
+
+	var modulePathTxtBuilder strings.Builder
+
+	first := true
+	for lib, dir := range modulePaths(ctx.Config()) {
+		if first {
+			first = false
+		} else {
+			modulePathTxtBuilder.WriteString("\\n")
+		}
+		modulePathTxtBuilder.WriteString(lib)
+		modulePathTxtBuilder.WriteString(".so ")
+		modulePathTxtBuilder.WriteString(dir)
+	}
+
+	ctx.Build(pctx, android.BuildParams{
+		Rule:        android.WriteFile,
+		Output:      modulePathTxt,
+		Description: "vndk snapshot module_paths.txt",
+		Args: map[string]string{
+			"content": modulePathTxtBuilder.String(),
+		},
+	})
+	outputs.configs = append(outputs.configs, modulePathTxt)
+}
diff --git a/java/android_manifest.go b/java/android_manifest.go
index 7b378cd..5d3cfa5 100644
--- a/java/android_manifest.go
+++ b/java/android_manifest.go
@@ -66,7 +66,7 @@
 	}
 
 	if useEmbeddedDex {
-		args = append(args, "--use-embedded-dex=true")
+		args = append(args, "--use-embedded-dex")
 	}
 
 	var deps android.Paths
diff --git a/java/app.go b/java/app.go
index db9c5dd..9f37836 100644
--- a/java/app.go
+++ b/java/app.go
@@ -163,7 +163,9 @@
 		}
 		ctx.AddFarVariationDependencies(variation, tag, a.appProperties.Jni_libs...)
 	}
+}
 
+func (a *AndroidApp) OverridablePropertiesDepsMutator(ctx android.BottomUpMutatorContext) {
 	cert := android.SrcIsModule(a.getCertString(ctx))
 	if cert != "" {
 		ctx.AddDependency(ctx.Module(), certificateTag, cert)
@@ -632,7 +634,7 @@
 	m := &OverrideAndroidApp{}
 	m.AddProperties(&overridableAppProperties{})
 
-	android.InitAndroidModule(m)
+	android.InitAndroidMultiTargetsArchModule(m, android.DeviceSupported, android.MultilibCommon)
 	android.InitOverrideModule(m)
 	return m
 }
diff --git a/java/app_test.go b/java/app_test.go
index bc35e21..347139e 100644
--- a/java/app_test.go
+++ b/java/app_test.go
@@ -881,7 +881,7 @@
 			name: "foo",
 			srcs: ["a.java"],
 			certificate: "expiredkey",
-			overrides: ["baz"],
+			overrides: ["qux"],
 		}
 
 		override_android_app {
@@ -903,6 +903,7 @@
 		`)
 
 	expectedVariants := []struct {
+		moduleName  string
 		variantName string
 		apkName     string
 		apkPath     string
@@ -911,24 +912,27 @@
 		aaptFlag    string
 	}{
 		{
+			moduleName:  "foo",
 			variantName: "android_common",
 			apkPath:     "/target/product/test_device/system/app/foo/foo.apk",
 			signFlag:    "build/make/target/product/security/expiredkey.x509.pem build/make/target/product/security/expiredkey.pk8",
-			overrides:   []string{"baz"},
+			overrides:   []string{"qux"},
 			aaptFlag:    "",
 		},
 		{
-			variantName: "bar_android_common",
+			moduleName:  "bar",
+			variantName: "android_common_bar",
 			apkPath:     "/target/product/test_device/system/app/bar/bar.apk",
 			signFlag:    "cert/new_cert.x509.pem cert/new_cert.pk8",
-			overrides:   []string{"baz", "foo"},
+			overrides:   []string{"qux", "foo"},
 			aaptFlag:    "",
 		},
 		{
-			variantName: "baz_android_common",
+			moduleName:  "baz",
+			variantName: "android_common_baz",
 			apkPath:     "/target/product/test_device/system/app/baz/baz.apk",
 			signFlag:    "build/make/target/product/security/expiredkey.x509.pem build/make/target/product/security/expiredkey.pk8",
-			overrides:   []string{"baz", "foo"},
+			overrides:   []string{"qux", "foo"},
 			aaptFlag:    "--rename-manifest-package org.dandroid.bp",
 		},
 	}
@@ -972,6 +976,47 @@
 	}
 }
 
+func TestOverrideAndroidAppDependency(t *testing.T) {
+	ctx := testJava(t, `
+		android_app {
+			name: "foo",
+			srcs: ["a.java"],
+		}
+
+		override_android_app {
+			name: "bar",
+			base: "foo",
+			package_name: "org.dandroid.bp",
+		}
+
+		android_test {
+			name: "baz",
+			srcs: ["b.java"],
+			instrumentation_for: "foo",
+		}
+
+		android_test {
+			name: "qux",
+			srcs: ["b.java"],
+			instrumentation_for: "bar",
+		}
+		`)
+
+	// Verify baz, which depends on the overridden module foo, has the correct classpath javac arg.
+	javac := ctx.ModuleForTests("baz", "android_common").Rule("javac")
+	fooTurbine := filepath.Join(buildDir, ".intermediates", "foo", "android_common", "turbine-combined", "foo.jar")
+	if !strings.Contains(javac.Args["classpath"], fooTurbine) {
+		t.Errorf("baz classpath %v does not contain %q", javac.Args["classpath"], fooTurbine)
+	}
+
+	// Verify qux, which depends on the overriding module bar, has the correct classpath javac arg.
+	javac = ctx.ModuleForTests("qux", "android_common").Rule("javac")
+	barTurbine := filepath.Join(buildDir, ".intermediates", "foo", "android_common_bar", "turbine-combined", "foo.jar")
+	if !strings.Contains(javac.Args["classpath"], barTurbine) {
+		t.Errorf("qux classpath %v does not contain %q", javac.Args["classpath"], barTurbine)
+	}
+}
+
 func TestAndroidAppImport(t *testing.T) {
 	ctx := testJava(t, `
 		android_app_import {
diff --git a/java/java_test.go b/java/java_test.go
index 370e796..50b1c34 100644
--- a/java/java_test.go
+++ b/java/java_test.go
@@ -93,10 +93,10 @@
 	ctx.PreArchMutators(android.RegisterPrebuiltsPreArchMutators)
 	ctx.PreArchMutators(android.RegisterPrebuiltsPostDepsMutators)
 	ctx.PreArchMutators(android.RegisterDefaultsPreArchMutators)
-	ctx.PreArchMutators(android.RegisterOverridePreArchMutators)
 	ctx.PreArchMutators(func(ctx android.RegisterMutatorsContext) {
 		ctx.TopDown("prebuilt_apis", PrebuiltApisMutator).Parallel()
 	})
+	ctx.PostDepsMutators(android.RegisterOverridePostDepsMutators)
 	ctx.RegisterPreSingletonType("overlay", android.SingletonFactoryAdaptor(OverlaySingletonFactory))
 	ctx.RegisterPreSingletonType("sdk_versions", android.SingletonFactoryAdaptor(sdkPreSingletonFactory))
 
diff --git a/java/sdk_library.go b/java/sdk_library.go
index 72c5cfc..5b65c0c 100644
--- a/java/sdk_library.go
+++ b/java/sdk_library.go
@@ -126,6 +126,9 @@
 	// If set to true, the path of dist files is apistubs/core. Defaults to false.
 	Core_lib *bool
 
+	// don't create dist rules.
+	No_dist *bool `blueprint:"mutated"`
+
 	// TODO: determines whether to create HTML doc or not
 	//Html_doc *bool
 }
@@ -212,52 +215,54 @@
 		android.WriteAndroidMkData(w, data)
 
 		module.Library.AndroidMkHostDex(w, name, data)
-		// Create a phony module that installs the impl library, for the case when this lib is
-		// in PRODUCT_PACKAGES.
-		owner := module.ModuleBase.Owner()
-		if owner == "" {
-			if Bool(module.sdkLibraryProperties.Core_lib) {
-				owner = "core"
-			} else {
-				owner = "android"
+		if !Bool(module.sdkLibraryProperties.No_dist) {
+			// Create a phony module that installs the impl library, for the case when this lib is
+			// in PRODUCT_PACKAGES.
+			owner := module.ModuleBase.Owner()
+			if owner == "" {
+				if Bool(module.sdkLibraryProperties.Core_lib) {
+					owner = "core"
+				} else {
+					owner = "android"
+				}
 			}
-		}
-		// Create dist rules to install the stubs libs to the dist dir
-		if len(module.publicApiStubsPath) == 1 {
-			fmt.Fprintln(w, "$(call dist-for-goals,sdk win_sdk,"+
-				module.publicApiStubsImplPath.Strings()[0]+
-				":"+path.Join("apistubs", owner, "public",
-				module.BaseModuleName()+".jar")+")")
-		}
-		if len(module.systemApiStubsPath) == 1 {
-			fmt.Fprintln(w, "$(call dist-for-goals,sdk win_sdk,"+
-				module.systemApiStubsImplPath.Strings()[0]+
-				":"+path.Join("apistubs", owner, "system",
-				module.BaseModuleName()+".jar")+")")
-		}
-		if len(module.testApiStubsPath) == 1 {
-			fmt.Fprintln(w, "$(call dist-for-goals,sdk win_sdk,"+
-				module.testApiStubsImplPath.Strings()[0]+
-				":"+path.Join("apistubs", owner, "test",
-				module.BaseModuleName()+".jar")+")")
-		}
-		if module.publicApiFilePath != nil {
-			fmt.Fprintln(w, "$(call dist-for-goals,sdk win_sdk,"+
-				module.publicApiFilePath.String()+
-				":"+path.Join("apistubs", owner, "public", "api",
-				module.BaseModuleName()+".txt")+")")
-		}
-		if module.systemApiFilePath != nil {
-			fmt.Fprintln(w, "$(call dist-for-goals,sdk win_sdk,"+
-				module.systemApiFilePath.String()+
-				":"+path.Join("apistubs", owner, "system", "api",
-				module.BaseModuleName()+".txt")+")")
-		}
-		if module.testApiFilePath != nil {
-			fmt.Fprintln(w, "$(call dist-for-goals,sdk win_sdk,"+
-				module.testApiFilePath.String()+
-				":"+path.Join("apistubs", owner, "test", "api",
-				module.BaseModuleName()+".txt")+")")
+			// Create dist rules to install the stubs libs to the dist dir
+			if len(module.publicApiStubsPath) == 1 {
+				fmt.Fprintln(w, "$(call dist-for-goals,sdk win_sdk,"+
+					module.publicApiStubsImplPath.Strings()[0]+
+					":"+path.Join("apistubs", owner, "public",
+					module.BaseModuleName()+".jar")+")")
+			}
+			if len(module.systemApiStubsPath) == 1 {
+				fmt.Fprintln(w, "$(call dist-for-goals,sdk win_sdk,"+
+					module.systemApiStubsImplPath.Strings()[0]+
+					":"+path.Join("apistubs", owner, "system",
+					module.BaseModuleName()+".jar")+")")
+			}
+			if len(module.testApiStubsPath) == 1 {
+				fmt.Fprintln(w, "$(call dist-for-goals,sdk win_sdk,"+
+					module.testApiStubsImplPath.Strings()[0]+
+					":"+path.Join("apistubs", owner, "test",
+					module.BaseModuleName()+".jar")+")")
+			}
+			if module.publicApiFilePath != nil {
+				fmt.Fprintln(w, "$(call dist-for-goals,sdk win_sdk,"+
+					module.publicApiFilePath.String()+
+					":"+path.Join("apistubs", owner, "public", "api",
+					module.BaseModuleName()+".txt")+")")
+			}
+			if module.systemApiFilePath != nil {
+				fmt.Fprintln(w, "$(call dist-for-goals,sdk win_sdk,"+
+					module.systemApiFilePath.String()+
+					":"+path.Join("apistubs", owner, "system", "api",
+					module.BaseModuleName()+".txt")+")")
+			}
+			if module.testApiFilePath != nil {
+				fmt.Fprintln(w, "$(call dist-for-goals,sdk win_sdk,"+
+					module.testApiFilePath.String()+
+					":"+path.Join("apistubs", owner, "test", "api",
+					module.BaseModuleName()+".txt")+")")
+			}
 		}
 	}
 	return data
@@ -641,6 +646,10 @@
 	}
 }
 
+func (module *SdkLibrary) SetNoDist() {
+	module.sdkLibraryProperties.No_dist = proptools.BoolPtr(true)
+}
+
 var javaSdkLibrariesKey = android.NewOnceKey("javaSdkLibraries")
 
 func javaSdkLibraries(config android.Config) *[]string {
diff --git a/scripts/manifest_fixer_test.py b/scripts/manifest_fixer_test.py
index 4ad9afa..7ec8999 100755
--- a/scripts/manifest_fixer_test.py
+++ b/scripts/manifest_fixer_test.py
@@ -231,7 +231,7 @@
 
   def run_test(self, input_manifest, new_uses_libraries):
     doc = minidom.parseString(input_manifest)
-    manifest_fixer.add_uses_libraries(doc, new_uses_libraries)
+    manifest_fixer.add_uses_libraries(doc, new_uses_libraries, True)
     output = StringIO.StringIO()
     manifest_fixer.write_xml(output, doc)
     return output.getvalue()
diff --git a/sysprop/sysprop_library.go b/sysprop/sysprop_library.go
index 0313ecd..3f2709e 100644
--- a/sysprop/sysprop_library.go
+++ b/sysprop/sysprop_library.go
@@ -72,6 +72,7 @@
 		&m.syspropLibraryProperties,
 	)
 	m.InitSdkLibraryProperties()
+	m.SetNoDist()
 	android.InitAndroidMultiTargetsArchModule(m, android.DeviceSupported, "common")
 	android.AddLoadHook(m, func(ctx android.LoadHookContext) { syspropLibraryHook(ctx, m) })
 	android.AddLoadHook(m, func(ctx android.LoadHookContext) { m.SdkLibrary.CreateInternalModules(ctx) })