Merge "Do not allow duplicate deapexer dependencies." into sc-dev
diff --git a/android/arch.go b/android/arch.go
index 84d1d59..bb1b613 100644
--- a/android/arch.go
+++ b/android/arch.go
@@ -1543,20 +1543,20 @@
 // getNdkAbisConfig returns a list of archConfigs for the ABIs supported by the NDK.
 func getNdkAbisConfig() []archConfig {
 	return []archConfig{
-		{"arm64", "armv8-a-branchprot", "", []string{"arm64-v8a"}},
 		{"arm", "armv7-a", "", []string{"armeabi-v7a"}},
-		{"x86_64", "", "", []string{"x86_64"}},
+		{"arm64", "armv8-a-branchprot", "", []string{"arm64-v8a"}},
 		{"x86", "", "", []string{"x86"}},
+		{"x86_64", "", "", []string{"x86_64"}},
 	}
 }
 
 // getAmlAbisConfig returns a list of archConfigs for the ABIs supported by mainline modules.
 func getAmlAbisConfig() []archConfig {
 	return []archConfig{
-		{"arm64", "armv8-a", "", []string{"arm64-v8a"}},
 		{"arm", "armv7-a-neon", "", []string{"armeabi-v7a"}},
-		{"x86_64", "", "", []string{"x86_64"}},
+		{"arm64", "armv8-a", "", []string{"arm64-v8a"}},
 		{"x86", "", "", []string{"x86"}},
+		{"x86_64", "", "", []string{"x86_64"}},
 	}
 }
 
diff --git a/android/neverallow.go b/android/neverallow.go
index 19b58a7..41b399a 100644
--- a/android/neverallow.go
+++ b/android/neverallow.go
@@ -55,7 +55,6 @@
 	AddNeverAllowRules(createCcSdkVariantRules()...)
 	AddNeverAllowRules(createUncompressDexRules()...)
 	AddNeverAllowRules(createMakefileGoalRules()...)
-	AddNeverAllowRules(createInitFirstStageRules()...)
 }
 
 // Add a NeverAllow rule to the set of rules to apply.
@@ -217,15 +216,6 @@
 	}
 }
 
-func createInitFirstStageRules() []Rule {
-	return []Rule{
-		NeverAllow().
-			Without("name", "init_first_stage").
-			With("install_in_root", "true").
-			Because("install_in_root is only for init_first_stage."),
-	}
-}
-
 func neverallowMutator(ctx BottomUpMutatorContext) {
 	m, ok := ctx.Module().(Module)
 	if !ok {
diff --git a/cc/cc.go b/cc/cc.go
index 5ee0314..c62fd6c 100644
--- a/cc/cc.go
+++ b/cc/cc.go
@@ -580,7 +580,6 @@
 	hostToolPath() android.OptionalPath
 	relativeInstallPath() string
 	makeUninstallable(mod *Module)
-	installInRoot() bool
 }
 
 // bazelHandler is the interface for a helper object related to deferring to Bazel for
@@ -1307,10 +1306,6 @@
 		Bool(c.sanitize.Properties.Sanitize.Config.Cfi_assembly_support)
 }
 
-func (c *Module) InstallInRoot() bool {
-	return c.installer != nil && c.installer.installInRoot()
-}
-
 type baseModuleContext struct {
 	android.BaseModuleContext
 	moduleContextImpl
diff --git a/cc/installer.go b/cc/installer.go
index f95b493..e551c63 100644
--- a/cc/installer.go
+++ b/cc/installer.go
@@ -25,10 +25,6 @@
 type InstallerProperties struct {
 	// install to a subdirectory of the default install path for the module
 	Relative_install_path *string `android:"arch_variant"`
-
-	// Install output directly in {partition}/, not in any subdir.  This is only intended for use by
-	// init_first_stage.
-	Install_in_root *bool `android:"arch_variant"`
 }
 
 type installLocation int
@@ -70,11 +66,6 @@
 	if ctx.toolchain().Is64Bit() && installer.dir64 != "" {
 		dir = installer.dir64
 	}
-
-	if installer.installInRoot() {
-		dir = ""
-	}
-
 	if ctx.Target().NativeBridge == android.NativeBridgeEnabled {
 		dir = filepath.Join(dir, ctx.Target().NativeBridgeRelativePath)
 	} else if !ctx.Host() && ctx.Config().HasMultilibConflict(ctx.Arch().ArchType) {
@@ -119,7 +110,3 @@
 func (installer *baseInstaller) makeUninstallable(mod *Module) {
 	mod.ModuleBase.MakeUninstallable()
 }
-
-func (installer *baseInstaller) installInRoot() bool {
-	return Bool(installer.Properties.Install_in_root)
-}
diff --git a/java/bootclasspath_fragment.go b/java/bootclasspath_fragment.go
index 35eb1f0..a039964 100644
--- a/java/bootclasspath_fragment.go
+++ b/java/bootclasspath_fragment.go
@@ -159,11 +159,12 @@
 	// versioned sdk.
 	produceHiddenAPIOutput(ctx android.ModuleContext, contents []android.Module, input HiddenAPIFlagInput) *HiddenAPIOutput
 
-	// produceBootImageFiles produces the boot image (i.e. .art, .oat and .vdex) files for each of the
-	// required android.ArchType values in the returned map.
+	// produceBootImageFiles will attempt to produce rules to create the boot image files at the paths
+	// predefined in the bootImageConfig.
 	//
-	// It must return nil if the boot image files cannot be produced for whatever reason.
-	produceBootImageFiles(ctx android.ModuleContext, imageConfig *bootImageConfig, contents []android.Module) bootImageFilesByArch
+	// If it could not create the files then it will return nil. Otherwise, it will return a map from
+	// android.ArchType to the predefined paths of the boot image files.
+	produceBootImageFiles(ctx android.ModuleContext, imageConfig *bootImageConfig) bootImageFilesByArch
 }
 
 var _ commonBootclasspathFragment = (*BootclasspathFragmentModule)(nil)
@@ -448,9 +449,13 @@
 		if imageConfig != nil {
 			// Delegate the production of the boot image files to a module type specific method.
 			common := ctx.Module().(commonBootclasspathFragment)
-			bootImageFilesByArch = common.produceBootImageFiles(ctx, imageConfig, contents)
+			bootImageFilesByArch = common.produceBootImageFiles(ctx, imageConfig)
 
 			if shouldCopyBootFilesToPredefinedLocations(ctx, imageConfig) {
+				// Zip the boot image files up, if available. This will generate the zip file in a
+				// predefined location.
+				buildBootImageZipInPredefinedLocation(ctx, imageConfig, bootImageFilesByArch)
+
 				// Copy the dex jars of this fragment's content modules to their predefined locations.
 				copyBootJarsToPredefinedLocations(ctx, hiddenAPIOutput.EncodedBootDexFilesByModule, imageConfig.dexPathsByModule)
 			}
@@ -525,27 +530,18 @@
 
 	global := dexpreopt.GetGlobalConfig(ctx)
 
-	// Convert content names to their appropriate stems, in case a test library is overriding an actual boot jar
-	var stems []string
-	for _, name := range b.properties.Contents {
-		dep := ctx.GetDirectDepWithTag(name, bootclasspathFragmentContentDepTag)
-		if m, ok := dep.(ModuleWithStem); ok {
-			stems = append(stems, m.Stem())
-		} else {
-			ctx.PropertyErrorf("contents", "%v is not a ModuleWithStem", name)
-		}
-	}
+	possibleUpdatableModules := gatherPossibleUpdatableModuleNamesAndStems(ctx, b.properties.Contents, bootclasspathFragmentContentDepTag)
 
 	// Only create configs for updatable boot jars. Non-updatable boot jars must be part of the
 	// platform_bootclasspath's classpath proto config to guarantee that they come before any
 	// updatable jars at runtime.
-	jars := global.UpdatableBootJars.Filter(stems)
+	jars := global.UpdatableBootJars.Filter(possibleUpdatableModules)
 
 	// TODO(satayev): for apex_test we want to include all contents unconditionally to classpaths
 	// config. However, any test specific jars would not be present in UpdatableBootJars. Instead,
 	// we should check if we are creating a config for apex_test via ApexInfo and amend the values.
 	// This is an exception to support end-to-end test for SdkExtensions, until such support exists.
-	if android.InList("test_framework-sdkextensions", stems) {
+	if android.InList("test_framework-sdkextensions", possibleUpdatableModules) {
 		jars = jars.Append("com.android.sdkext", "test_framework-sdkextensions")
 	}
 	return jars
@@ -576,25 +572,9 @@
 	// Create hidden API input structure.
 	input := b.createHiddenAPIFlagInput(ctx, contents, fragments)
 
-	var output *HiddenAPIOutput
-
-	// Hidden API processing is conditional as a temporary workaround as not all
-	// bootclasspath_fragments provide the appropriate information needed for hidden API processing
-	// which leads to breakages of the build.
-	// TODO(b/179354495): Stop hidden API processing being conditional once all bootclasspath_fragment
-	//  modules have been updated to support it.
-	if input.canPerformHiddenAPIProcessing(ctx, b.properties) {
-		// Delegate the production of the hidden API all-flags.csv file to a module type specific method.
-		common := ctx.Module().(commonBootclasspathFragment)
-		output = common.produceHiddenAPIOutput(ctx, contents, input)
-	} else {
-		// As hidden API processing cannot be performed fall back to trying to retrieve the legacy
-		// encoded boot dex files, i.e. those files encoded by the individual libraries and returned
-		// from the DexJarBuildPath() method.
-		output = &HiddenAPIOutput{
-			EncodedBootDexFilesByModule: retrieveLegacyEncodedBootDexFiles(ctx, contents),
-		}
-	}
+	// Delegate the production of the hidden API all-flags.csv file to a module type specific method.
+	common := ctx.Module().(commonBootclasspathFragment)
+	output := common.produceHiddenAPIOutput(ctx, contents, input)
 
 	// Initialize a HiddenAPIInfo structure.
 	hiddenAPIInfo := HiddenAPIInfo{
@@ -666,55 +646,49 @@
 }
 
 // produceBootImageFiles builds the boot image files from the source if it is required.
-func (b *BootclasspathFragmentModule) produceBootImageFiles(ctx android.ModuleContext, imageConfig *bootImageConfig, contents []android.Module) bootImageFilesByArch {
+func (b *BootclasspathFragmentModule) produceBootImageFiles(ctx android.ModuleContext, imageConfig *bootImageConfig) bootImageFilesByArch {
 	if SkipDexpreoptBootJars(ctx) {
 		return nil
 	}
 
-	// Force the GlobalSoongConfig to be created and cached for use by the dex_bootjars
-	// GenerateSingletonBuildActions method as it cannot create it for itself.
-	dexpreopt.GetGlobalSoongConfig(ctx)
-
 	// Only generate the boot image if the configuration does not skip it.
-	if !b.generateBootImageBuildActions(ctx, contents, imageConfig) {
-		return nil
-	}
-
-	// Only make the files available to an apex if they were actually generated.
-	files := bootImageFilesByArch{}
-	for _, variant := range imageConfig.apexVariants() {
-		files[variant.target.Arch.ArchType] = variant.imagesDeps.Paths()
-	}
-
-	return files
+	return b.generateBootImageBuildActions(ctx, imageConfig)
 }
 
 // generateBootImageBuildActions generates ninja rules to create the boot image if required for this
 // module.
 //
-// Returns true if the boot image is created, false otherwise.
-func (b *BootclasspathFragmentModule) generateBootImageBuildActions(ctx android.ModuleContext, contents []android.Module, imageConfig *bootImageConfig) bool {
+// If it could not create the files then it will return nil. Otherwise, it will return a map from
+// android.ArchType to the predefined paths of the boot image files.
+func (b *BootclasspathFragmentModule) generateBootImageBuildActions(ctx android.ModuleContext, imageConfig *bootImageConfig) bootImageFilesByArch {
 	global := dexpreopt.GetGlobalConfig(ctx)
 	if !shouldBuildBootImages(ctx.Config(), global) {
-		return false
+		return nil
 	}
 
 	// Bootclasspath fragment modules that are for the platform do not produce a boot image.
 	apexInfo := ctx.Provider(android.ApexInfoProvider).(android.ApexInfo)
 	if apexInfo.IsForPlatform() {
-		return false
+		return nil
 	}
 
 	// Bootclasspath fragment modules that are versioned do not produce a boot image.
 	if android.IsModuleInVersionedSdk(ctx.Module()) {
-		return false
+		return nil
 	}
 
 	// Build a profile for the image config and then use that to build the boot image.
 	profile := bootImageProfileRule(ctx, imageConfig)
-	buildBootImage(ctx, imageConfig, profile)
 
-	return true
+	// Build boot image files for the host variants.
+	buildBootImageVariantsForBuildOs(ctx, imageConfig, profile)
+
+	// Build boot image files for the android variants.
+	androidBootImageFilesByArch := buildBootImageVariantsForAndroidOs(ctx, imageConfig, profile)
+
+	// Return the boot image files for the android variants for inclusion in an APEX and to be zipped
+	// up for the dist.
+	return androidBootImageFilesByArch
 }
 
 type bootclasspathFragmentMemberType struct {
@@ -927,7 +901,7 @@
 }
 
 // produceBootImageFiles extracts the boot image files from the APEX if available.
-func (module *prebuiltBootclasspathFragmentModule) produceBootImageFiles(ctx android.ModuleContext, imageConfig *bootImageConfig, contents []android.Module) bootImageFilesByArch {
+func (module *prebuiltBootclasspathFragmentModule) produceBootImageFiles(ctx android.ModuleContext, imageConfig *bootImageConfig) bootImageFilesByArch {
 	if !shouldCopyBootFilesToPredefinedLocations(ctx, imageConfig) {
 		return nil
 	}
@@ -953,6 +927,7 @@
 	}
 
 	di := ctx.OtherModuleProvider(deapexerModule, android.DeapexerProvider).(android.DeapexerInfo)
+	files := bootImageFilesByArch{}
 	for _, variant := range imageConfig.apexVariants() {
 		arch := variant.target.Arch.ArchType
 		for _, toPath := range variant.imagesDeps {
@@ -960,6 +935,10 @@
 			// Get the path to the file that the deapexer extracted from the prebuilt apex file.
 			fromPath := di.PrebuiltExportPath(apexRelativePath)
 
+			// Return the toPath as the calling code expects the paths in the returned map to be the
+			// paths predefined in the bootImageConfig.
+			files[arch] = append(files[arch], toPath)
+
 			// Copy the file to the predefined location.
 			ctx.Build(pctx, android.BuildParams{
 				Rule:   android.Cp,
@@ -969,10 +948,13 @@
 		}
 	}
 
-	// The returned files will be made available to APEXes that include a bootclasspath_fragment.
-	// However, as a prebuilt_bootclasspath_fragment can never contribute to an APEX there is no point
-	// in returning any files.
-	return nil
+	// Build the boot image files for the host variants. These are built from the dex files provided
+	// by the contents of this module as prebuilt versions of the host boot image files are not
+	// available, i.e. there is no host specific prebuilt apex containing them. This has to be built
+	// without a profile as the prebuilt modules do not provide a profile.
+	buildBootImageVariantsForBuildOs(ctx, imageConfig, nil)
+
+	return files
 }
 
 var _ commonBootclasspathFragment = (*prebuiltBootclasspathFragmentModule)(nil)
diff --git a/java/classpath_fragment.go b/java/classpath_fragment.go
index 0e14d24..ecfdfb7 100644
--- a/java/classpath_fragment.go
+++ b/java/classpath_fragment.go
@@ -89,6 +89,29 @@
 	maxSdkVersion int32
 }
 
+// gatherPossibleUpdatableModuleNamesAndStems returns a set of module and stem names from the
+// supplied contents that may be in the updatable boot jars.
+//
+// The module names are included because sometimes the stem is set to just change the name of
+// the installed file and it expects the configuration to still use the actual module name.
+//
+// The stem names are included because sometimes the stem is set to change the effective name of the
+// module that is used in the configuration as well,e .g. when a test library is overriding an
+// actual boot jar
+func gatherPossibleUpdatableModuleNamesAndStems(ctx android.ModuleContext, contents []string, tag blueprint.DependencyTag) []string {
+	set := map[string]struct{}{}
+	for _, name := range contents {
+		dep := ctx.GetDirectDepWithTag(name, tag)
+		set[name] = struct{}{}
+		if m, ok := dep.(ModuleWithStem); ok {
+			set[m.Stem()] = struct{}{}
+		} else {
+			ctx.PropertyErrorf("contents", "%v is not a ModuleWithStem", name)
+		}
+	}
+	return android.SortedStringKeys(set)
+}
+
 // Converts android.ConfiguredJarList into a list of classpathJars for each given classpathType.
 func configuredJarListToClasspathJars(ctx android.ModuleContext, configuredJars android.ConfiguredJarList, classpaths ...classpathType) []classpathJar {
 	paths := configuredJars.DevicePaths(ctx.Config(), android.Android)
diff --git a/java/dexpreopt_bootjars.go b/java/dexpreopt_bootjars.go
index 03769fa..19c65ca 100644
--- a/java/dexpreopt_bootjars.go
+++ b/java/dexpreopt_bootjars.go
@@ -502,32 +502,72 @@
 	}
 }
 
-// buildBootImage takes a bootImageConfig, and creates rules to build it.
-func buildBootImage(ctx android.ModuleContext, image *bootImageConfig, profile android.WritablePath) {
-	var zipFiles android.Paths
+// buildBootImageVariantsForAndroidOs generates rules to build the boot image variants for the
+// android.Android OsType and returns a map from the architectures to the paths of the generated
+// boot image files.
+//
+// The paths are returned because they are needed elsewhere in Soong, e.g. for populating an APEX.
+func buildBootImageVariantsForAndroidOs(ctx android.ModuleContext, image *bootImageConfig, profile android.WritablePath) bootImageFilesByArch {
+	return buildBootImageForOsType(ctx, image, profile, android.Android)
+}
+
+// buildBootImageVariantsForBuildOs generates rules to build the boot image variants for the
+// android.BuildOs OsType, i.e. the type of OS on which the build is being running.
+//
+// The files need to be generated into their predefined location because they are used from there
+// both within Soong and outside, e.g. for ART based host side testing and also for use by some
+// cloud based tools. However, they are not needed by callers of this function and so the paths do
+// not need to be returned from this func, unlike the buildBootImageVariantsForAndroidOs func.
+func buildBootImageVariantsForBuildOs(ctx android.ModuleContext, image *bootImageConfig, profile android.WritablePath) {
+	buildBootImageForOsType(ctx, image, profile, android.BuildOs)
+}
+
+// buildBootImageForOsType takes a bootImageConfig, a profile file and an android.OsType
+// boot image files are required for and it creates rules to build the boot image
+// files for all the required architectures for them.
+//
+// It returns a map from android.ArchType to the predefined paths of the boot image files.
+func buildBootImageForOsType(ctx android.ModuleContext, image *bootImageConfig, profile android.WritablePath, requiredOsType android.OsType) bootImageFilesByArch {
+	filesByArch := bootImageFilesByArch{}
 	for _, variant := range image.variants {
-		files := buildBootImageVariant(ctx, variant, profile)
-		if variant.target.Os == android.Android {
-			zipFiles = append(zipFiles, files.Paths()...)
+		if variant.target.Os == requiredOsType {
+			buildBootImageVariant(ctx, variant, profile)
+			filesByArch[variant.target.Arch.ArchType] = variant.imagesDeps.Paths()
 		}
 	}
 
-	if image.zip != nil {
-		rule := android.NewRuleBuilder(pctx, ctx)
-		rule.Command().
-			BuiltTool("soong_zip").
-			FlagWithOutput("-o ", image.zip).
-			FlagWithArg("-C ", image.dir.Join(ctx, android.Android.String()).String()).
-			FlagWithInputList("-f ", zipFiles, " -f ")
+	return filesByArch
+}
 
-		rule.Build("zip_"+image.name, "zip "+image.name+" image")
+// buildBootImageZipInPredefinedLocation generates a zip file containing all the boot image files.
+//
+// The supplied filesByArch is nil when the boot image files have not been generated. Otherwise, it
+// is a map from android.ArchType to the predefined locations.
+func buildBootImageZipInPredefinedLocation(ctx android.ModuleContext, image *bootImageConfig, filesByArch bootImageFilesByArch) {
+	if filesByArch == nil {
+		return
 	}
+
+	// Compute the list of files from all the architectures.
+	zipFiles := android.Paths{}
+	for _, archType := range android.ArchTypeList() {
+		zipFiles = append(zipFiles, filesByArch[archType]...)
+	}
+
+	rule := android.NewRuleBuilder(pctx, ctx)
+	rule.Command().
+		BuiltTool("soong_zip").
+		FlagWithOutput("-o ", image.zip).
+		FlagWithArg("-C ", image.dir.Join(ctx, android.Android.String()).String()).
+		FlagWithInputList("-f ", zipFiles, " -f ")
+
+	rule.Build("zip_"+image.name, "zip "+image.name+" image")
 }
 
 // Generate boot image build rules for a specific target.
-func buildBootImageVariant(ctx android.ModuleContext, image *bootImageVariant, profile android.Path) android.WritablePaths {
+func buildBootImageVariant(ctx android.ModuleContext, image *bootImageVariant, profile android.Path) {
 
-	globalSoong := dexpreopt.GetCachedGlobalSoongConfig(ctx)
+	globalSoong := dexpreopt.GetGlobalSoongConfig(ctx)
 	global := dexpreopt.GetGlobalConfig(ctx)
 
 	arch := image.target.Arch.ArchType
@@ -641,11 +681,8 @@
 	var vdexInstalls android.RuleBuilderInstalls
 	var unstrippedInstalls android.RuleBuilderInstalls
 
-	var zipFiles android.WritablePaths
-
 	for _, artOrOat := range image.moduleFiles(ctx, outputDir, ".art", ".oat") {
 		cmd.ImplicitOutput(artOrOat)
-		zipFiles = append(zipFiles, artOrOat)
 
 		// Install the .oat and .art files
 		rule.Install(artOrOat, filepath.Join(installDir, artOrOat.Base()))
@@ -653,7 +690,6 @@
 
 	for _, vdex := range image.moduleFiles(ctx, outputDir, ".vdex") {
 		cmd.ImplicitOutput(vdex)
-		zipFiles = append(zipFiles, vdex)
 
 		// Note that the vdex files are identical between architectures.
 		// Make rules will create symlinks to share them between architectures.
@@ -675,8 +711,6 @@
 	image.installs = rule.Installs()
 	image.vdexInstalls = vdexInstalls
 	image.unstrippedInstalls = unstrippedInstalls
-
-	return zipFiles
 }
 
 const failureMessage = `ERROR: Dex2oat failed to compile a boot image.
@@ -684,7 +718,7 @@
 Rebuild with ART_BOOT_IMAGE_EXTRA_ARGS="--runtime-arg -verbose:verifier" to see verification errors.`
 
 func bootImageProfileRule(ctx android.ModuleContext, image *bootImageConfig) android.WritablePath {
-	globalSoong := dexpreopt.GetCachedGlobalSoongConfig(ctx)
+	globalSoong := dexpreopt.GetGlobalSoongConfig(ctx)
 	global := dexpreopt.GetGlobalConfig(ctx)
 
 	if global.DisableGenerateProfile {
diff --git a/java/hiddenapi_modular.go b/java/hiddenapi_modular.go
index af12484..654ebb7 100644
--- a/java/hiddenapi_modular.go
+++ b/java/hiddenapi_modular.go
@@ -20,7 +20,6 @@
 
 	"android/soong/android"
 	"github.com/google/blueprint"
-	"github.com/google/blueprint/proptools"
 )
 
 // Contains support for processing hiddenAPI in a modular fashion.
@@ -712,42 +711,6 @@
 	return input
 }
 
-// canPerformHiddenAPIProcessing determines whether hidden API processing should be performed.
-//
-// A temporary workaround to avoid existing bootclasspath_fragments that do not provide the
-// appropriate information needed for hidden API processing breaking the build.
-// TODO(b/179354495): Remove this workaround.
-func (i *HiddenAPIFlagInput) canPerformHiddenAPIProcessing(ctx android.ModuleContext, properties bootclasspathFragmentProperties) bool {
-	// Performing hidden API processing without stubs is not supported and it is unlikely to ever be
-	// required as the whole point of adding something to the bootclasspath fragment is to add it to
-	// the bootclasspath in order to be used by something else in the system. Without any stubs it
-	// cannot do that.
-	if len(i.StubDexJarsByScope) == 0 {
-		return false
-	}
-
-	// Hidden API processing is always enabled in tests.
-	if ctx.Config().TestProductVariables != nil {
-		return true
-	}
-
-	// A module that has fragments should have access to the information it needs in order to perform
-	// hidden API processing.
-	if len(properties.Fragments) != 0 {
-		return true
-	}
-
-	// The art bootclasspath fragment does not depend on any other fragments but already supports
-	// hidden API processing.
-	imageName := proptools.String(properties.Image_name)
-	if imageName == "art" {
-		return true
-	}
-
-	// Disable it for everything else.
-	return false
-}
-
 // gatherStubLibInfo gathers information from the stub libs needed by hidden API processing from the
 // dependencies added in hiddenAPIAddStubLibDependencies.
 //
@@ -1161,6 +1124,14 @@
 		return true
 	}
 
+	// A bootclasspath module that is part of a versioned sdk never provides a boot dex jar as there
+	// is no equivalently versioned prebuilt APEX file from which it can be obtained. However,
+	// versioned bootclasspath modules are processed by Soong so in order to avoid them causing build
+	// failures missing boot dex jars need to be deferred.
+	if android.IsModuleInVersionedSdk(ctx.Module()) {
+		return true
+	}
+
 	// This is called for both platform_bootclasspath and bootclasspath_fragment modules.
 	//
 	// A bootclasspath_fragment module should only use the APEX variant of source or prebuilt modules.
@@ -1197,6 +1168,14 @@
 	//
 	// TODO(b/187910671): Remove this once platform variants are no longer created unnecessarily.
 	if android.IsModulePrebuilt(module) {
+		// An inactive source module can still contribute to the APEX but an inactive prebuilt module
+		// should not contribute to anything. So, rather than have a missing dex jar cause a Soong
+		// failure defer the error reporting to Ninja. Unless the prebuilt build target is explicitly
+		// built Ninja should never use the dex jar file.
+		if !isActiveModule(module) {
+			return true
+		}
+
 		if am, ok := module.(android.ApexModule); ok && am.InAnyApex() {
 			apexInfo := ctx.OtherModuleProvider(module, android.ApexInfoProvider).(android.ApexInfo)
 			if apexInfo.IsForPlatform() {
@@ -1205,14 +1184,6 @@
 		}
 	}
 
-	// A bootclasspath module that is part of a versioned sdk never provides a boot dex jar as there
-	// is no equivalently versioned prebuilt APEX file from which it can be obtained. However,
-	// versioned bootclasspath modules are processed by Soong so in order to avoid them causing build
-	// failures missing boot dex jars need to be deferred.
-	if android.IsModuleInVersionedSdk(ctx.Module()) {
-		return true
-	}
-
 	return false
 }
 
diff --git a/java/lint.go b/java/lint.go
index dd5e4fb..fe3218e 100644
--- a/java/lint.go
+++ b/java/lint.go
@@ -391,8 +391,9 @@
 	rule.Command().Text("rm -f").Output(html).Output(text).Output(xml)
 
 	var apiVersionsName, apiVersionsPrebuilt string
-	if l.compileSdkKind == android.SdkModule {
-		// When compiling an SDK module we use the filtered database because otherwise lint's
+	if l.compileSdkKind == android.SdkModule || l.compileSdkKind == android.SdkSystemServer {
+		// When compiling an SDK module (or system server) we use the filtered
+		// database because otherwise lint's
 		// NewApi check produces too many false positives; This database excludes information
 		// about classes created in mainline modules hence removing those false positives.
 		apiVersionsName = "api_versions_public_filtered.xml"
diff --git a/java/lint_test.go b/java/lint_test.go
index 9cf1c33..456e6ba 100644
--- a/java/lint_test.go
+++ b/java/lint_test.go
@@ -261,6 +261,9 @@
 }
 
 func TestJavaLintDatabaseSelectionPublicFiltered(t *testing.T) {
+	testCases := []string{
+		"module_current", "system_server_current",
+	}
 	bp := `
 		java_library {
 			name: "foo",
@@ -274,17 +277,20 @@
 			},
 		}
 `
-	result := android.GroupFixturePreparers(PrepareForTestWithJavaDefaultModules).
-		RunTestWithBp(t, bp)
+	for _, testCase := range testCases {
+		thisBp := strings.Replace(bp, "XXX", testCase, 1)
+		result := android.GroupFixturePreparers(PrepareForTestWithJavaDefaultModules).
+			RunTestWithBp(t, thisBp)
 
-	foo := result.ModuleForTests("foo", "android_common")
-	sboxProto := android.RuleBuilderSboxProtoForTests(t, foo.Output("lint.sbox.textproto"))
-	if !strings.Contains(*sboxProto.Commands[0].Command,
-		"/api_versions_public_filtered.xml") {
-		t.Error("did not use public-filtered lint api database", *sboxProto.Commands[0].Command)
-	}
-	if strings.Contains(*sboxProto.Commands[0].Command,
-		"/api_versions.xml") {
-		t.Error("used full api database")
+		foo := result.ModuleForTests("foo", "android_common")
+		sboxProto := android.RuleBuilderSboxProtoForTests(t, foo.Output("lint.sbox.textproto"))
+		if !strings.Contains(*sboxProto.Commands[0].Command,
+			"/api_versions_public_filtered.xml") {
+			t.Error("did not use public-filtered lint api database for case", testCase)
+		}
+		if strings.Contains(*sboxProto.Commands[0].Command,
+			"/api_versions.xml") {
+			t.Error("used full api database for case", testCase)
+		}
 	}
 }
diff --git a/java/platform_bootclasspath.go b/java/platform_bootclasspath.go
index 41b5f1e..10739b0 100644
--- a/java/platform_bootclasspath.go
+++ b/java/platform_bootclasspath.go
@@ -421,7 +421,15 @@
 
 	// Build a profile for the image config and then use that to build the boot image.
 	profile := bootImageProfileRule(ctx, imageConfig)
-	buildBootImage(ctx, imageConfig, profile)
+
+	// Build boot image files for the android variants.
+	androidBootImageFilesByArch := buildBootImageVariantsForAndroidOs(ctx, imageConfig, profile)
+
+	// Zip the android variant boot image files up.
+	buildBootImageZipInPredefinedLocation(ctx, imageConfig, androidBootImageFilesByArch)
+
+	// Build boot image files for the host variants. There are use directly by ART host side tests.
+	buildBootImageVariantsForBuildOs(ctx, imageConfig, profile)
 
 	dumpOatRules(ctx, imageConfig)
 }
diff --git a/java/systemserver_classpath_fragment.go b/java/systemserver_classpath_fragment.go
index 992ade5..a2006b7 100644
--- a/java/systemserver_classpath_fragment.go
+++ b/java/systemserver_classpath_fragment.go
@@ -98,21 +98,12 @@
 func (s *SystemServerClasspathModule) ClasspathFragmentToConfiguredJarList(ctx android.ModuleContext) android.ConfiguredJarList {
 	global := dexpreopt.GetGlobalConfig(ctx)
 
-	// Convert content names to their appropriate stems, in case a test library is overriding an actual boot jar
-	var stems []string
-	for _, name := range s.properties.Contents {
-		dep := ctx.GetDirectDepWithTag(name, systemServerClasspathFragmentContentDepTag)
-		if m, ok := dep.(ModuleWithStem); ok {
-			stems = append(stems, m.Stem())
-		} else {
-			ctx.PropertyErrorf("contents", "%v is not a ModuleWithStem", name)
-		}
-	}
+	possibleUpdatableModules := gatherPossibleUpdatableModuleNamesAndStems(ctx, s.properties.Contents, systemServerClasspathFragmentContentDepTag)
 
 	// Only create configs for updatable boot jars. Non-updatable system server jars must be part of the
 	// platform_systemserverclasspath's classpath proto config to guarantee that they come before any
 	// updatable jars at runtime.
-	return global.UpdatableSystemServerJars.Filter(stems)
+	return global.UpdatableSystemServerJars.Filter(possibleUpdatableModules)
 }
 
 type systemServerClasspathFragmentContentDependencyTag struct {
diff --git a/sdk/bootclasspath_fragment_sdk_test.go b/sdk/bootclasspath_fragment_sdk_test.go
index 5e4b3fe..9b7b868 100644
--- a/sdk/bootclasspath_fragment_sdk_test.go
+++ b/sdk/bootclasspath_fragment_sdk_test.go
@@ -133,6 +133,13 @@
     apex_available: ["com.android.art"],
     image_name: "art",
     contents: ["mybootlib"],
+    hidden_api: {
+        stub_flags: "hiddenapi/stub-flags.csv",
+        annotation_flags: "hiddenapi/annotation-flags.csv",
+        metadata: "hiddenapi/metadata.csv",
+        index: "hiddenapi/index.csv",
+        all_flags: "hiddenapi/all-flags.csv",
+    },
 }
 
 java_import {
@@ -153,6 +160,13 @@
     apex_available: ["com.android.art"],
     image_name: "art",
     contents: ["mysdk_mybootlib@current"],
+    hidden_api: {
+        stub_flags: "hiddenapi/stub-flags.csv",
+        annotation_flags: "hiddenapi/annotation-flags.csv",
+        metadata: "hiddenapi/metadata.csv",
+        index: "hiddenapi/index.csv",
+        all_flags: "hiddenapi/all-flags.csv",
+    },
 }
 
 java_import {
@@ -171,8 +185,13 @@
 }
 `),
 		checkAllCopyRules(`
+.intermediates/mybootclasspathfragment/android_common/modular-hiddenapi/stub-flags.csv -> hiddenapi/stub-flags.csv
+.intermediates/mybootclasspathfragment/android_common/modular-hiddenapi/annotation-flags.csv -> hiddenapi/annotation-flags.csv
+.intermediates/mybootclasspathfragment/android_common/modular-hiddenapi/metadata.csv -> hiddenapi/metadata.csv
+.intermediates/mybootclasspathfragment/android_common/modular-hiddenapi/index.csv -> hiddenapi/index.csv
+.intermediates/mybootclasspathfragment/android_common/modular-hiddenapi/all-flags.csv -> hiddenapi/all-flags.csv
 .intermediates/mybootlib/android_common/javac/mybootlib.jar -> java/mybootlib.jar
-`),
+		`),
 		snapshotTestPreparer(checkSnapshotWithoutSource, preparerForSnapshot),
 
 		// Check the behavior of the snapshot without the source.
diff --git a/sysprop/sysprop_library.go b/sysprop/sysprop_library.go
index a29d4c3..f1c2d0d 100644
--- a/sysprop/sysprop_library.go
+++ b/sysprop/sysprop_library.go
@@ -145,9 +145,6 @@
 	// If set to true, allow this module to be dexed and installed on devices.
 	Installable *bool
 
-	// Make this module available when building for ramdisk
-	Ramdisk_available *bool
-
 	// Make this module available when building for recovery
 	Recovery_available *bool
 
@@ -399,7 +396,6 @@
 	Recovery_available *bool
 	Vendor_available   *bool
 	Product_available  *bool
-	Ramdisk_available  *bool
 	Host_supported     *bool
 	Apex_available     []string
 	Min_sdk_version    *string
@@ -479,7 +475,6 @@
 	ccProps.Recovery_available = m.properties.Recovery_available
 	ccProps.Vendor_available = m.properties.Vendor_available
 	ccProps.Product_available = m.properties.Product_available
-	ccProps.Ramdisk_available = m.properties.Ramdisk_available
 	ccProps.Host_supported = m.properties.Host_supported
 	ccProps.Apex_available = m.ApexProperties.Apex_available
 	ccProps.Min_sdk_version = m.properties.Cpp.Min_sdk_version