Merge "uncompressedDex option for android_app_import."
diff --git a/Android.bp b/Android.bp
index 1fdd44e..afac2b5 100644
--- a/Android.bp
+++ b/Android.bp
@@ -276,6 +276,7 @@
         "java/plugin.go",
         "java/prebuilt_apis.go",
         "java/proto.go",
+        "java/robolectric.go",
         "java/sdk.go",
         "java/sdk_library.go",
         "java/support_libraries.go",
@@ -443,6 +444,7 @@
     defaults: ["linux_bionic_supported"],
     vendor_available: true,
     recovery_available: true,
+    native_bridge_supported: true,
 
     arch: {
         arm: {
@@ -465,6 +467,7 @@
     defaults: ["linux_bionic_supported"],
     vendor_available: true,
     recovery_available: true,
+    native_bridge_supported: true,
 
     arch: {
         arm: {
@@ -483,6 +486,118 @@
 }
 
 toolchain_library {
+    name: "libgcc_stripped",
+    defaults: ["linux_bionic_supported"],
+    vendor_available: true,
+    recovery_available: true,
+    native_bridge_supported: true,
+
+    arch: {
+        arm: {
+            src: "prebuilts/gcc/linux-x86/arm/arm-linux-androideabi-4.9/lib/gcc/arm-linux-androideabi/4.9.x/libgcc.a",
+            strip: {
+                keep_symbols_list: [
+                    // unwind-arm.o
+                    "_Unwind_Complete",
+                    "_Unwind_DeleteException",
+                    "_Unwind_GetCFA",
+                    "_Unwind_VRS_Get",
+                    "_Unwind_VRS_Pop",
+                    "_Unwind_VRS_Set",
+                    "__aeabi_unwind_cpp_pr0",
+                    "__aeabi_unwind_cpp_pr1",
+                    "__aeabi_unwind_cpp_pr2",
+                    "__gnu_Unwind_Backtrace",
+                    "__gnu_Unwind_ForcedUnwind",
+                    "__gnu_Unwind_RaiseException",
+                    "__gnu_Unwind_Resume",
+                    "__gnu_Unwind_Resume_or_Rethrow",
+
+                    // libunwind.o
+                    "_Unwind_Backtrace",
+                    "_Unwind_ForcedUnwind",
+                    "_Unwind_RaiseException",
+                    "_Unwind_Resume",
+                    "_Unwind_Resume_or_Rethrow",
+                    "___Unwind_Backtrace",
+                    "___Unwind_ForcedUnwind",
+                    "___Unwind_RaiseException",
+                    "___Unwind_Resume",
+                    "___Unwind_Resume_or_Rethrow",
+                    "__gnu_Unwind_Restore_VFP",
+                    "__gnu_Unwind_Restore_VFP_D",
+                    "__gnu_Unwind_Restore_VFP_D_16_to_31",
+                    "__gnu_Unwind_Restore_WMMXC",
+                    "__gnu_Unwind_Restore_WMMXD",
+                    "__gnu_Unwind_Save_VFP",
+                    "__gnu_Unwind_Save_VFP_D",
+                    "__gnu_Unwind_Save_VFP_D_16_to_31",
+                    "__gnu_Unwind_Save_WMMXC",
+                    "__gnu_Unwind_Save_WMMXD",
+                    "__restore_core_regs",
+                    "restore_core_regs",
+
+                    // pr-support.o
+                    "_Unwind_GetDataRelBase",
+                    "_Unwind_GetLanguageSpecificData",
+                    "_Unwind_GetRegionStart",
+                    "_Unwind_GetTextRelBase",
+                    "__gnu_unwind_execute",
+                    "__gnu_unwind_frame",
+                ],
+                use_gnu_strip: true,
+            },
+        },
+        arm64: {
+            src: "prebuilts/gcc/linux-x86/aarch64/aarch64-linux-android-4.9/lib/gcc/aarch64-linux-android/4.9.x/libgcc.a",
+        },
+        x86: {
+            src: "prebuilts/gcc/linux-x86/x86/x86_64-linux-android-4.9/lib/gcc/x86_64-linux-android/4.9.x/32/libgcc.a",
+
+        },
+        x86_64: {
+            src: "prebuilts/gcc/linux-x86/x86/x86_64-linux-android-4.9/lib/gcc/x86_64-linux-android/4.9.x/libgcc.a",
+        },
+    },
+    strip: {
+        keep_symbols_list: [
+            // unwind-dw2.o
+            "_Unwind_Backtrace",
+            "_Unwind_DeleteException",
+            "_Unwind_FindEnclosingFunction",
+            "_Unwind_ForcedUnwind",
+            "_Unwind_GetCFA",
+            "_Unwind_GetDataRelBase",
+            "_Unwind_GetGR",
+            "_Unwind_GetIP",
+            "_Unwind_GetIPInfo",
+            "_Unwind_GetLanguageSpecificData",
+            "_Unwind_GetRegionStart",
+            "_Unwind_GetTextRelBase",
+            "_Unwind_RaiseException",
+            "_Unwind_Resume",
+            "_Unwind_Resume_or_Rethrow",
+            "_Unwind_SetGR",
+            "_Unwind_SetIP",
+            "__frame_state_for",
+
+            // unwind-dw2-fde-dip.o
+            "_Unwind_Find_FDE",
+            "__deregister_frame",
+            "__deregister_frame_info",
+            "__deregister_frame_info_bases",
+            "__register_frame",
+            "__register_frame_info",
+            "__register_frame_info_bases",
+            "__register_frame_info_table",
+            "__register_frame_info_table_bases",
+            "__register_frame_table",
+        ],
+        use_gnu_strip: true,
+    },
+}
+
+toolchain_library {
     name: "libwinpthread",
     host_supported: true,
     enabled: false,
diff --git a/android/androidmk.go b/android/androidmk.go
index 2a3748e..2bbd452 100644
--- a/android/androidmk.go
+++ b/android/androidmk.go
@@ -28,6 +28,10 @@
 	"github.com/google/blueprint/bootstrap"
 )
 
+var (
+	NativeBridgeSuffix = ".native_bridge"
+)
+
 func init() {
 	RegisterSingletonType("androidmk", AndroidMkSingleton)
 }
@@ -161,6 +165,10 @@
 		}
 	}
 
+	if amod.Target().NativeBridge {
+		a.SubName += NativeBridgeSuffix
+	}
+
 	fmt.Fprintln(&a.header, "\ninclude $(CLEAR_VARS)")
 
 	// Collect make variable assignment entries.
@@ -190,7 +198,22 @@
 	case Device:
 		// Make cannot identify LOCAL_MODULE_TARGET_ARCH:= common.
 		if archStr != "common" {
-			a.SetString("LOCAL_MODULE_TARGET_ARCH", archStr)
+			if amod.Target().NativeBridge {
+				// TODO: Unhardcode these rules.
+				guestArchStr := archStr
+				hostArchStr := ""
+				if guestArchStr == "arm" {
+					hostArchStr = "x86"
+				} else if guestArchStr == "arm64" {
+					hostArchStr = "x86_64"
+				}
+
+				if hostArchStr != "" {
+					a.SetString("LOCAL_MODULE_TARGET_ARCH", hostArchStr)
+				}
+			} else {
+				a.SetString("LOCAL_MODULE_TARGET_ARCH", archStr)
+			}
 		}
 
 		a.AddStrings("LOCAL_INIT_RC", amod.commonProperties.Init_rc...)
diff --git a/android/arch.go b/android/arch.go
index 957a659..c68fe46 100644
--- a/android/arch.go
+++ b/android/arch.go
@@ -683,13 +683,25 @@
 	return NoOsType
 }
 
+type NativeBridgeSupport bool
+
+const (
+	NativeBridgeDisabled NativeBridgeSupport = false
+	NativeBridgeEnabled  NativeBridgeSupport = true
+)
+
 type Target struct {
-	Os   OsType
-	Arch Arch
+	Os           OsType
+	Arch         Arch
+	NativeBridge NativeBridgeSupport
 }
 
 func (target Target) String() string {
-	return target.Os.String() + "_" + target.Arch.String()
+	variant := ""
+	if target.NativeBridge {
+		variant = "native_bridge_"
+	}
+	return target.Os.String() + "_" + variant + target.Arch.String()
 }
 
 // archMutator splits a module into a variant for each Target requested by the module.  Target selection
@@ -750,6 +762,18 @@
 			continue
 		}
 
+		// Filter NativeBridge targets unless they are explicitly supported
+		if os == Android && !Bool(base.commonProperties.Native_bridge_supported) {
+			var targets []Target
+			for _, t := range osTargets {
+				if !t.NativeBridge {
+					targets = append(targets, t)
+				}
+			}
+
+			osTargets = targets
+		}
+
 		// only the primary arch in the recovery partition
 		if os == Android && module.InstallInRecovery() {
 			osTargets = []Target{osTargets[0]}
@@ -1378,7 +1402,8 @@
 	targets := make(map[OsType][]Target)
 	var targetErr error
 
-	addTarget := func(os OsType, archName string, archVariant, cpuVariant *string, abi []string) {
+	addTarget := func(os OsType, archName string, archVariant, cpuVariant *string, abi []string,
+		nativeBridgeEnabled NativeBridgeSupport) {
 		if targetErr != nil {
 			return
 		}
@@ -1391,8 +1416,9 @@
 
 		targets[os] = append(targets[os],
 			Target{
-				Os:   os,
-				Arch: arch,
+				Os:           os,
+				Arch:         arch,
+				NativeBridge: nativeBridgeEnabled,
 			})
 	}
 
@@ -1400,14 +1426,14 @@
 		return nil, fmt.Errorf("No host primary architecture set")
 	}
 
-	addTarget(BuildOs, *variables.HostArch, nil, nil, nil)
+	addTarget(BuildOs, *variables.HostArch, nil, nil, nil, NativeBridgeDisabled)
 
 	if variables.HostSecondaryArch != nil && *variables.HostSecondaryArch != "" {
-		addTarget(BuildOs, *variables.HostSecondaryArch, nil, nil, nil)
+		addTarget(BuildOs, *variables.HostSecondaryArch, nil, nil, nil, NativeBridgeDisabled)
 	}
 
 	if Bool(config.Host_bionic) {
-		addTarget(LinuxBionic, "x86_64", nil, nil, nil)
+		addTarget(LinuxBionic, "x86_64", nil, nil, nil, NativeBridgeDisabled)
 	}
 
 	if String(variables.CrossHost) != "" {
@@ -1420,10 +1446,10 @@
 			return nil, fmt.Errorf("No cross-host primary architecture set")
 		}
 
-		addTarget(crossHostOs, *variables.CrossHostArch, nil, nil, nil)
+		addTarget(crossHostOs, *variables.CrossHostArch, nil, nil, nil, NativeBridgeDisabled)
 
 		if variables.CrossHostSecondaryArch != nil && *variables.CrossHostSecondaryArch != "" {
-			addTarget(crossHostOs, *variables.CrossHostSecondaryArch, nil, nil, nil)
+			addTarget(crossHostOs, *variables.CrossHostSecondaryArch, nil, nil, nil, NativeBridgeDisabled)
 		}
 	}
 
@@ -1434,18 +1460,32 @@
 		}
 
 		addTarget(target, *variables.DeviceArch, variables.DeviceArchVariant,
-			variables.DeviceCpuVariant, variables.DeviceAbi)
+			variables.DeviceCpuVariant, variables.DeviceAbi, NativeBridgeDisabled)
 
 		if variables.DeviceSecondaryArch != nil && *variables.DeviceSecondaryArch != "" {
 			addTarget(Android, *variables.DeviceSecondaryArch,
 				variables.DeviceSecondaryArchVariant, variables.DeviceSecondaryCpuVariant,
-				variables.DeviceSecondaryAbi)
+				variables.DeviceSecondaryAbi, NativeBridgeDisabled)
 
 			deviceArches := targets[Android]
 			if deviceArches[0].Arch.ArchType.Multilib == deviceArches[1].Arch.ArchType.Multilib {
 				deviceArches[1].Arch.Native = false
 			}
 		}
+
+		if variables.NativeBridgeArch != nil && *variables.NativeBridgeArch != "" {
+			addTarget(Android, *variables.NativeBridgeArch,
+				variables.NativeBridgeArchVariant, variables.NativeBridgeCpuVariant,
+				variables.NativeBridgeAbi, NativeBridgeEnabled)
+		}
+
+		if variables.DeviceSecondaryArch != nil && *variables.DeviceSecondaryArch != "" &&
+			variables.NativeBridgeSecondaryArch != nil && *variables.NativeBridgeSecondaryArch != "" {
+			addTarget(Android, *variables.NativeBridgeSecondaryArch,
+				variables.NativeBridgeSecondaryArchVariant,
+				variables.NativeBridgeSecondaryCpuVariant,
+				variables.NativeBridgeSecondaryAbi, NativeBridgeEnabled)
+		}
 	}
 
 	if targetErr != nil {
diff --git a/android/config.go b/android/config.go
index 3495ad2..b142042 100644
--- a/android/config.go
+++ b/android/config.go
@@ -234,16 +234,36 @@
 	return Config{config}
 }
 
+func TestArchConfigNativeBridge(buildDir string, env map[string]string) Config {
+	testConfig := TestConfig(buildDir, env)
+	config := testConfig.config
+
+	config.Targets = map[OsType][]Target{
+		Android: []Target{
+			{Android, Arch{ArchType: X86_64, ArchVariant: "silvermont", Native: true, Abi: []string{"arm64-v8a"}}, NativeBridgeDisabled},
+			{Android, Arch{ArchType: X86, ArchVariant: "silvermont", Native: true, Abi: []string{"armeabi-v7a"}}, NativeBridgeDisabled},
+			{Android, Arch{ArchType: Arm64, ArchVariant: "armv8-a", Native: true, Abi: []string{"arm64-v8a"}}, NativeBridgeEnabled},
+			{Android, Arch{ArchType: Arm, ArchVariant: "armv7-a-neon", Native: true, Abi: []string{"armeabi-v7a"}}, NativeBridgeEnabled},
+		},
+		BuildOs: []Target{
+			{BuildOs, Arch{ArchType: X86_64}, NativeBridgeDisabled},
+			{BuildOs, Arch{ArchType: X86}, NativeBridgeDisabled},
+		},
+	}
+
+	return testConfig
+}
+
 func TestArchConfigFuchsia(buildDir string, env map[string]string) Config {
 	testConfig := TestConfig(buildDir, env)
 	config := testConfig.config
 
 	config.Targets = map[OsType][]Target{
 		Fuchsia: []Target{
-			{Fuchsia, Arch{ArchType: Arm64, ArchVariant: "", Native: true}},
+			{Fuchsia, Arch{ArchType: Arm64, ArchVariant: "", Native: true}, NativeBridgeDisabled},
 		},
 		BuildOs: []Target{
-			{BuildOs, Arch{ArchType: X86_64}},
+			{BuildOs, Arch{ArchType: X86_64}, NativeBridgeDisabled},
 		},
 	}
 
@@ -257,12 +277,12 @@
 
 	config.Targets = map[OsType][]Target{
 		Android: []Target{
-			{Android, Arch{ArchType: Arm64, ArchVariant: "armv8-a", Native: true, Abi: []string{"arm64-v8a"}}},
-			{Android, Arch{ArchType: Arm, ArchVariant: "armv7-a-neon", Native: true, Abi: []string{"armeabi-v7a"}}},
+			{Android, Arch{ArchType: Arm64, ArchVariant: "armv8-a", Native: true, Abi: []string{"arm64-v8a"}}, NativeBridgeDisabled},
+			{Android, Arch{ArchType: Arm, ArchVariant: "armv7-a-neon", Native: true, Abi: []string{"armeabi-v7a"}}, NativeBridgeDisabled},
 		},
 		BuildOs: []Target{
-			{BuildOs, Arch{ArchType: X86_64}},
-			{BuildOs, Arch{ArchType: X86}},
+			{BuildOs, Arch{ArchType: X86_64}, NativeBridgeDisabled},
+			{BuildOs, Arch{ArchType: X86}, NativeBridgeDisabled},
 		},
 	}
 
diff --git a/android/module.go b/android/module.go
index 6743412..fb5c00a 100644
--- a/android/module.go
+++ b/android/module.go
@@ -143,6 +143,7 @@
 	OtherModuleErrorf(m blueprint.Module, fmt string, args ...interface{})
 	OtherModuleDependencyTag(m blueprint.Module) blueprint.DependencyTag
 
+	GetDirectDepsWithTag(tag blueprint.DependencyTag) []Module
 	GetDirectDepWithTag(name string, tag blueprint.DependencyTag) blueprint.Module
 	GetDirectDep(name string) (blueprint.Module, blueprint.DependencyTag)
 
@@ -289,6 +290,9 @@
 	// Whether this module is installed to recovery partition
 	Recovery *bool
 
+	// Whether this module is built for non-native architecures (also known as native bridge binary)
+	Native_bridge_supported *bool `android:"arch_variant"`
+
 	// init.rc files to be installed if this module is installed
 	Init_rc []string `android:"path"`
 
@@ -1093,6 +1097,18 @@
 	}
 }
 
+func (a *androidModuleContext) GetDirectDepsWithTag(tag blueprint.DependencyTag) []Module {
+	var deps []Module
+	a.VisitDirectDepsBlueprint(func(m blueprint.Module) {
+		if aModule, _ := m.(Module); aModule != nil {
+			if a.ModuleContext.OtherModuleDependencyTag(aModule) == tag {
+				deps = append(deps, aModule)
+			}
+		}
+	})
+	return deps
+}
+
 func (a *androidModuleContext) GetDirectDepWithTag(name string, tag blueprint.DependencyTag) blueprint.Module {
 	m, _ := a.getDirectDepInternal(name, tag)
 	return m
diff --git a/android/variable.go b/android/variable.go
index d29ba73..c500671 100644
--- a/android/variable.go
+++ b/android/variable.go
@@ -165,6 +165,16 @@
 	DeviceSecondaryCpuVariant  *string  `json:",omitempty"`
 	DeviceSecondaryAbi         []string `json:",omitempty"`
 
+	NativeBridgeArch        *string  `json:",omitempty"`
+	NativeBridgeArchVariant *string  `json:",omitempty"`
+	NativeBridgeCpuVariant  *string  `json:",omitempty"`
+	NativeBridgeAbi         []string `json:",omitempty"`
+
+	NativeBridgeSecondaryArch        *string  `json:",omitempty"`
+	NativeBridgeSecondaryArchVariant *string  `json:",omitempty"`
+	NativeBridgeSecondaryCpuVariant  *string  `json:",omitempty"`
+	NativeBridgeSecondaryAbi         []string `json:",omitempty"`
+
 	HostArch          *string `json:",omitempty"`
 	HostSecondaryArch *string `json:",omitempty"`
 
diff --git a/apex/apex_test.go b/apex/apex_test.go
index b0cd4be..5276ce4 100644
--- a/apex/apex_test.go
+++ b/apex/apex_test.go
@@ -93,6 +93,13 @@
 		}
 
 		toolchain_library {
+			name: "libgcc_stripped",
+			src: "",
+			vendor_available: true,
+			recovery_available: true,
+		}
+
+		toolchain_library {
 			name: "libclang_rt.builtins-aarch64-android",
 			src: "",
 			vendor_available: true,
diff --git a/cc/builder.go b/cc/builder.go
index 7b26d51..c99e461 100644
--- a/cc/builder.go
+++ b/cc/builder.go
@@ -255,6 +255,7 @@
 	groupStaticLibs bool
 
 	stripKeepSymbols       bool
+	stripKeepSymbolsList   string
 	stripKeepMiniDebugInfo bool
 	stripAddGnuDebuglink   bool
 	stripUseGnuStrip       bool
@@ -835,6 +836,9 @@
 	if flags.stripKeepSymbols {
 		args += " --keep-symbols"
 	}
+	if flags.stripKeepSymbolsList != "" {
+		args += " -k" + flags.stripKeepSymbolsList
+	}
 	if flags.stripUseGnuStrip {
 		args += " --use-gnu-strip"
 	}
diff --git a/cc/cc.go b/cc/cc.go
index 0f5c68a..bb24942 100644
--- a/cc/cc.go
+++ b/cc/cc.go
@@ -1804,6 +1804,8 @@
 				return libName + vendorPublicLibrarySuffix
 			} else if ccDep.inRecovery() && !ccDep.onlyInRecovery() {
 				return libName + recoverySuffix
+			} else if ccDep.Target().NativeBridge == android.NativeBridgeEnabled {
+				return libName + android.NativeBridgeSuffix
 			} else {
 				return libName
 			}
diff --git a/cc/cc_test.go b/cc/cc_test.go
index 05d74b9..f3d5e60 100644
--- a/cc/cc_test.go
+++ b/cc/cc_test.go
@@ -1833,13 +1833,13 @@
 	// Check the shared version of lib2.
 	variant := "android_arm64_armv8-a_core_shared"
 	module := ctx.ModuleForTests("lib2", variant).Module().(*Module)
-	checkStaticLibs(t, []string{"lib1", "libclang_rt.builtins-aarch64-android", "libatomic", "libgcc"}, module)
+	checkStaticLibs(t, []string{"lib1", "libclang_rt.builtins-aarch64-android", "libatomic", "libgcc_stripped"}, module)
 
 	// Check the static version of lib2.
 	variant = "android_arm64_armv8-a_core_static"
 	module = ctx.ModuleForTests("lib2", variant).Module().(*Module)
 	// libc++_static is linked additionally.
-	checkStaticLibs(t, []string{"lib1", "libc++_static", "libclang_rt.builtins-aarch64-android", "libatomic", "libgcc"}, module)
+	checkStaticLibs(t, []string{"lib1", "libc++_static", "libclang_rt.builtins-aarch64-android", "libatomic", "libgcc_stripped"}, module)
 }
 
 var compilerFlagsTestCases = []struct {
diff --git a/cc/installer.go b/cc/installer.go
index bd8f9e7..cb261b7 100644
--- a/cc/installer.go
+++ b/cc/installer.go
@@ -66,7 +66,7 @@
 	if ctx.toolchain().Is64Bit() && installer.dir64 != "" {
 		dir = installer.dir64
 	}
-	if !ctx.Host() && !ctx.Arch().Native {
+	if (!ctx.Host() && !ctx.Arch().Native) || ctx.Target().NativeBridge == android.NativeBridgeEnabled {
 		dir = filepath.Join(dir, ctx.Arch().ArchType.String())
 	}
 	if installer.location == InstallInData && ctx.useVndk() {
diff --git a/cc/linker.go b/cc/linker.go
index e724df6..986a562 100644
--- a/cc/linker.go
+++ b/cc/linker.go
@@ -228,10 +228,10 @@
 		// libclang_rt.builtins, libgcc and libatomic have to be last on the command line
 		if !Bool(linker.Properties.No_libcrt) {
 			deps.LateStaticLibs = append(deps.LateStaticLibs, config.BuiltinsRuntimeLibrary(ctx.toolchain()))
-		}
-
-		deps.LateStaticLibs = append(deps.LateStaticLibs, "libatomic")
-		if !Bool(linker.Properties.No_libgcc) {
+			deps.LateStaticLibs = append(deps.LateStaticLibs, "libatomic")
+			deps.LateStaticLibs = append(deps.LateStaticLibs, "libgcc_stripped")
+		} else if !Bool(linker.Properties.No_libgcc) {
+			deps.LateStaticLibs = append(deps.LateStaticLibs, "libatomic")
 			deps.LateStaticLibs = append(deps.LateStaticLibs, "libgcc")
 		}
 
diff --git a/cc/ndk_prebuilt.go b/cc/ndk_prebuilt.go
index 2a7e657..8451295 100644
--- a/cc/ndk_prebuilt.go
+++ b/cc/ndk_prebuilt.go
@@ -64,6 +64,10 @@
 	return deps
 }
 
+// ndk_prebuilt_object exports a precompiled ndk object file for linking
+// operations. Soong's module name format is ndk_<NAME>.o.<sdk_version> where
+// the object is located under
+// ./prebuilts/ndk/current/platforms/android-<sdk_version>/arch-$(HOST_ARCH)/usr/lib/<NAME>.o.
 func ndkPrebuiltObjectFactory() android.Module {
 	module := newBaseModule(android.DeviceSupported, android.MultilibBoth)
 	module.linker = &ndkPrebuiltObjectLinker{
@@ -98,6 +102,10 @@
 	return deps
 }
 
+// ndk_prebuilt_shared_stl exports a precompiled ndk shared standard template
+// library (stl) library for linking operation. The soong's module name format
+// is ndk_<NAME>.so where the library is located under
+// ./prebuilts/ndk/current/sources/cxx-stl/llvm-libc++/libs/$(HOST_ARCH)/<NAME>.so.
 func ndkPrebuiltSharedStlFactory() android.Module {
 	module, library := NewLibrary(android.DeviceSupported)
 	library.BuildOnlyShared()
@@ -113,6 +121,10 @@
 	return module.Init()
 }
 
+// ndk_prebuilt_static_stl exports a precompiled ndk static standard template
+// library (stl) library for linking operation. The soong's module name format
+// is ndk_<NAME>.a where the library is located under
+// ./prebuilts/ndk/current/sources/cxx-stl/llvm-libc++/libs/$(HOST_ARCH)/<NAME>.a.
 func ndkPrebuiltStaticStlFactory() android.Module {
 	module, library := NewLibrary(android.DeviceSupported)
 	library.BuildOnlyStatic()
diff --git a/cc/strip.go b/cc/strip.go
index 02397f4..7122585 100644
--- a/cc/strip.go
+++ b/cc/strip.go
@@ -15,15 +15,19 @@
 package cc
 
 import (
+	"strings"
+
 	"android/soong/android"
 )
 
 type StripProperties struct {
 	Strip struct {
-		None         *bool
-		All          *bool
-		Keep_symbols *bool
-	}
+		None              *bool    `android:"arch_variant"`
+		All               *bool    `android:"arch_variant"`
+		Keep_symbols      *bool    `android:"arch_variant"`
+		Keep_symbols_list []string `android:"arch_variant"`
+		Use_gnu_strip     *bool    `android:"arch_variant"`
+	} `android:"arch_variant"`
 }
 
 type stripper struct {
@@ -42,9 +46,14 @@
 	} else {
 		if Bool(stripper.StripProperties.Strip.Keep_symbols) {
 			flags.stripKeepSymbols = true
+		} else if len(stripper.StripProperties.Strip.Keep_symbols_list) > 0 {
+			flags.stripKeepSymbolsList = strings.Join(stripper.StripProperties.Strip.Keep_symbols_list, ",")
 		} else if !Bool(stripper.StripProperties.Strip.All) {
 			flags.stripKeepMiniDebugInfo = true
 		}
+		if Bool(stripper.StripProperties.Strip.Use_gnu_strip) {
+			flags.stripUseGnuStrip = true
+		}
 		if ctx.Config().Debuggable() && !flags.stripKeepMiniDebugInfo {
 			flags.stripAddGnuDebuglink = true
 		}
diff --git a/cc/testing.go b/cc/testing.go
index 2f41de1..8d76c2f 100644
--- a/cc/testing.go
+++ b/cc/testing.go
@@ -69,6 +69,13 @@
 			src: "",
 		}
 
+		toolchain_library {
+			name: "libgcc_stripped",
+			vendor_available: true,
+			recovery_available: true,
+			src: "",
+		}
+
 		cc_library {
 			name: "libc",
 			no_libgcc: true,
diff --git a/cc/toolchain_library.go b/cc/toolchain_library.go
index 6494a26..b4c51ab 100644
--- a/cc/toolchain_library.go
+++ b/cc/toolchain_library.go
@@ -34,6 +34,8 @@
 type toolchainLibraryDecorator struct {
 	*libraryDecorator
 
+	stripper
+
 	Properties toolchainLibraryProperties
 }
 
@@ -45,7 +47,7 @@
 func (library *toolchainLibraryDecorator) linkerProps() []interface{} {
 	var props []interface{}
 	props = append(props, library.libraryDecorator.linkerProps()...)
-	return append(props, &library.Properties)
+	return append(props, &library.Properties, &library.stripper.StripProperties)
 }
 
 // toolchain_library is used internally by the build tool to link the specified
@@ -78,7 +80,17 @@
 		return android.PathForSource(ctx, "")
 	}
 
-	return android.PathForSource(ctx, *library.Properties.Src)
+	srcPath := android.PathForSource(ctx, *library.Properties.Src)
+
+	if library.stripper.StripProperties.Strip.Keep_symbols_list != nil {
+		fileName := ctx.ModuleName() + staticLibraryExtension
+		outputFile := android.PathForModuleOut(ctx, fileName)
+		buildFlags := flagsToBuilderFlags(flags)
+		library.stripper.strip(ctx, srcPath, outputFile, buildFlags)
+		return outputFile
+	}
+
+	return srcPath
 }
 
 func (library *toolchainLibraryDecorator) nativeCoverage() bool {
diff --git a/java/aar.go b/java/aar.go
index 6d40a8a..5e1f88e 100644
--- a/java/aar.go
+++ b/java/aar.go
@@ -81,7 +81,7 @@
 	extraAaptPackagesFile   android.Path
 	mergedManifestFile      android.Path
 	isLibrary               bool
-	uncompressedJNI         bool
+	useEmbeddedNativeLibs   bool
 	useEmbeddedDex          bool
 	usesNonSdkApis          bool
 
@@ -201,7 +201,7 @@
 	manifestSrcPath := android.PathForModuleSrc(ctx, manifestFile)
 
 	manifestPath := manifestFixer(ctx, manifestSrcPath, sdkContext,
-		a.isLibrary, a.uncompressedJNI, a.usesNonSdkApis, a.useEmbeddedDex)
+		a.isLibrary, a.useEmbeddedNativeLibs, a.usesNonSdkApis, a.useEmbeddedDex)
 
 	a.transitiveManifestPaths = append(android.Paths{manifestPath}, transitiveStaticLibManifests...)
 
diff --git a/java/android_manifest.go b/java/android_manifest.go
index ea7c2dd..7b378cd 100644
--- a/java/android_manifest.go
+++ b/java/android_manifest.go
@@ -43,7 +43,7 @@
 
 // Uses manifest_fixer.py to inject minSdkVersion, etc. into an AndroidManifest.xml
 func manifestFixer(ctx android.ModuleContext, manifest android.Path, sdkContext sdkContext,
-	isLibrary, uncompressedJNI, usesNonSdkApis, useEmbeddedDex bool) android.Path {
+	isLibrary, useEmbeddedNativeLibs, usesNonSdkApis, useEmbeddedDex bool) android.Path {
 
 	var args []string
 	if isLibrary {
@@ -54,8 +54,8 @@
 			ctx.ModuleErrorf("invalid minSdkVersion: %s", err)
 		}
 		if minSdkVersion >= 23 {
-			args = append(args, fmt.Sprintf("--extract-native-libs=%v", !uncompressedJNI))
-		} else if uncompressedJNI {
+			args = append(args, fmt.Sprintf("--extract-native-libs=%v", !useEmbeddedNativeLibs))
+		} else if useEmbeddedNativeLibs {
 			ctx.ModuleErrorf("module attempted to store uncompressed native libraries, but minSdkVersion=%d doesn't support it",
 				minSdkVersion)
 		}
diff --git a/java/app.go b/java/app.go
index 2280c3f..ec021fc 100644
--- a/java/app.go
+++ b/java/app.go
@@ -162,14 +162,14 @@
 }
 
 func (a *AndroidApp) GenerateAndroidBuildActions(ctx android.ModuleContext) {
-	a.aapt.uncompressedJNI = a.shouldUncompressJNI(ctx)
+	a.aapt.useEmbeddedNativeLibs = a.useEmbeddedNativeLibs(ctx)
 	a.aapt.useEmbeddedDex = Bool(a.appProperties.Use_embedded_dex)
 	a.generateAndroidBuildActions(ctx)
 }
 
-// shouldUncompressJNI returns true if the native libraries should be stored in the APK uncompressed and the
+// Returns true if the native libraries should be stored in the APK uncompressed and the
 // extractNativeLibs application flag should be set to false in the manifest.
-func (a *AndroidApp) shouldUncompressJNI(ctx android.ModuleContext) bool {
+func (a *AndroidApp) useEmbeddedNativeLibs(ctx android.ModuleContext) bool {
 	minSdkVersion, err := sdkVersionToNumber(ctx, a.minSdkVersion())
 	if err != nil {
 		ctx.PropertyErrorf("min_sdk_version", "invalid value %q: %s", a.minSdkVersion(), err)
@@ -288,7 +288,7 @@
 			a.appProperties.AlwaysPackageNativeLibs
 		if embedJni {
 			jniJarFile = android.PathForModuleOut(ctx, "jnilibs.zip")
-			TransformJniLibsToJar(ctx, jniJarFile, jniLibs, a.shouldUncompressJNI(ctx))
+			TransformJniLibsToJar(ctx, jniJarFile, jniLibs, a.useEmbeddedNativeLibs(ctx))
 		} else {
 			a.installJniLibs = jniLibs
 		}
@@ -482,6 +482,8 @@
 			a.additionalAaptFlags = append(a.additionalAaptFlags, "--rename-instrumentation-target-package "+manifestPackageName)
 		}
 	}
+	a.aapt.useEmbeddedNativeLibs = a.useEmbeddedNativeLibs(ctx)
+	a.aapt.useEmbeddedDex = Bool(a.appProperties.Use_embedded_dex)
 	a.generateAndroidBuildActions(ctx)
 
 	a.testConfig = tradefed.AutoGenInstrumentationTestConfig(ctx, a.testProperties.Test_config, a.testProperties.Test_config_template, a.manifestPath, a.testProperties.Test_suites)
diff --git a/java/dexpreopt.go b/java/dexpreopt.go
index a7938c8..08fd06e 100644
--- a/java/dexpreopt.go
+++ b/java/dexpreopt.go
@@ -111,7 +111,9 @@
 	if len(archs) == 0 {
 		// assume this is a java library, dexpreopt for all arches for now
 		for _, target := range ctx.Config().Targets[android.Android] {
-			archs = append(archs, target.Arch.ArchType)
+			if target.NativeBridge == android.NativeBridgeDisabled {
+				archs = append(archs, target.Arch.ArchType)
+			}
 		}
 		if inList(ctx.ModuleName(), global.SystemServerJars) && !d.isSDKLibrary {
 			// If the module is not an SDK library and it's a system server jar, only preopt the primary arch.
diff --git a/java/dexpreopt_bootjars.go b/java/dexpreopt_bootjars.go
index cb2ea9f..092a133 100644
--- a/java/dexpreopt_bootjars.go
+++ b/java/dexpreopt_bootjars.go
@@ -197,8 +197,10 @@
 		}
 
 		for _, target := range targets {
-			files := buildBootImageRuleForArch(ctx, image, target.Arch.ArchType, profile, missingDeps)
-			allFiles = append(allFiles, files.Paths()...)
+			if target.NativeBridge == android.NativeBridgeDisabled {
+				files := buildBootImageRuleForArch(ctx, image, target.Arch.ArchType, profile, missingDeps)
+				allFiles = append(allFiles, files.Paths()...)
+			}
 		}
 	}
 
diff --git a/java/robolectric.go b/java/robolectric.go
new file mode 100644
index 0000000..26f1e9d
--- /dev/null
+++ b/java/robolectric.go
@@ -0,0 +1,110 @@
+// Copyright 2019 Google Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package java
+
+import (
+	"fmt"
+	"io"
+	"strings"
+
+	"android/soong/android"
+)
+
+func init() {
+	android.RegisterModuleType("android_robolectric_test", RobolectricTestFactory)
+}
+
+var robolectricDefaultLibs = []string{
+	"robolectric_android-all-stub",
+	"Robolectric_all-target",
+	"mockito-robolectric-prebuilt",
+	"truth-prebuilt",
+}
+
+type robolectricProperties struct {
+	// The name of the android_app module that the tests will run against.
+	Instrumentation_for *string
+
+	Test_options struct {
+		// Timeout in seconds when running the tests.
+		Timeout *string
+	}
+}
+
+type robolectricTest struct {
+	Library
+
+	robolectricProperties robolectricProperties
+
+	libs []string
+}
+
+func (r *robolectricTest) DepsMutator(ctx android.BottomUpMutatorContext) {
+	r.Library.DepsMutator(ctx)
+
+	if r.robolectricProperties.Instrumentation_for != nil {
+		ctx.AddVariationDependencies(nil, instrumentationForTag, String(r.robolectricProperties.Instrumentation_for))
+	} else {
+		ctx.PropertyErrorf("instrumentation_for", "missing required instrumented module")
+	}
+
+	ctx.AddVariationDependencies(nil, libTag, robolectricDefaultLibs...)
+}
+
+func (r *robolectricTest) GenerateAndroidBuildActions(ctx android.ModuleContext) {
+	r.Library.GenerateAndroidBuildActions(ctx)
+
+	for _, dep := range ctx.GetDirectDepsWithTag(libTag) {
+		r.libs = append(r.libs, ctx.OtherModuleName(dep))
+	}
+}
+
+func (r *robolectricTest) AndroidMk() android.AndroidMkData {
+	data := r.Library.AndroidMk()
+
+	data.Custom = func(w io.Writer, name, prefix, moduleDir string, data android.AndroidMkData) {
+		android.WriteAndroidMkData(w, data)
+
+		fmt.Fprintln(w, "")
+		fmt.Fprintln(w, "include $(CLEAR_VARS)")
+		fmt.Fprintln(w, "LOCAL_MODULE := Run"+name)
+		fmt.Fprintln(w, "LOCAL_JAVA_LIBRARIES :=", name)
+		fmt.Fprintln(w, "LOCAL_JAVA_LIBRARIES += ", strings.Join(r.libs, " "))
+		fmt.Fprintln(w, "LOCAL_TEST_PACKAGE :=", String(r.robolectricProperties.Instrumentation_for))
+		if t := r.robolectricProperties.Test_options.Timeout; t != nil {
+			fmt.Fprintln(w, "LOCAL_ROBOTEST_TIMEOUT :=", *t)
+		}
+		fmt.Fprintln(w, "-include external/robolectric-shadows/run_robotests.mk")
+	}
+
+	return data
+}
+
+// An android_robolectric_test module compiles tests against the Robolectric framework that can run on the local host
+// instead of on a device.  It also generates a rule with the name of the module prefixed with "Run" that can be
+// used to run the tests.  Running the tests with build rule will eventually be deprecated and replaced with atest.
+func RobolectricTestFactory() android.Module {
+	module := &robolectricTest{}
+
+	module.AddProperties(
+		&module.Module.properties,
+		&module.Module.protoProperties,
+		&module.robolectricProperties)
+
+	module.Module.dexpreopter.isTest = true
+
+	InitJavaModule(module, android.DeviceSupported)
+	return module
+}
diff --git a/scripts/strip.sh b/scripts/strip.sh
index d536907..0f77da8 100755
--- a/scripts/strip.sh
+++ b/scripts/strip.sh
@@ -24,6 +24,7 @@
 #   -i ${file}: input file (required)
 #   -o ${file}: output file (required)
 #   -d ${file}: deps file (required)
+#   -k symbols: Symbols to keep (optional)
 #   --add-gnu-debuglink
 #   --keep-mini-debug-info
 #   --keep-symbols
@@ -32,11 +33,11 @@
 
 set -o pipefail
 
-OPTSTRING=d:i:o:-:
+OPTSTRING=d:i:o:k:-:
 
 usage() {
     cat <<EOF
-Usage: strip.sh [options] -i in-file -o out-file -d deps-file
+Usage: strip.sh [options] -k symbols -i in-file -o out-file -d deps-file
 Options:
         --add-gnu-debuglink     Add a gnu-debuglink section to out-file
         --keep-mini-debug-info  Keep compressed debug info in out-file
@@ -71,6 +72,20 @@
     fi
 }
 
+do_strip_keep_symbol_list() {
+    if [ -z "${use_gnu_strip}" ]; then
+        echo "do_strip_keep_symbol_list does not work with llvm-objcopy"
+        echo "http://b/131631155"
+        usage
+    fi
+
+    echo "${symbols_to_keep}" | tr ',' '\n' > "${outfile}.symbolList"
+    KEEP_SYMBOLS="-w --strip-unneeded-symbol=* --keep-symbols="
+    KEEP_SYMBOLS+="${outfile}.symbolList"
+
+    "${CROSS_COMPILE}objcopy" "${infile}" "${outfile}.tmp" ${KEEP_SYMBOLS}
+}
+
 do_strip_keep_mini_debug_info() {
     rm -f "${outfile}.dynsyms" "${outfile}.funcsyms" "${outfile}.keep_symbols" "${outfile}.debug" "${outfile}.mini_debuginfo" "${outfile}.mini_debuginfo.xz"
     local fail=
@@ -124,19 +139,21 @@
 
 while getopts $OPTSTRING opt; do
     case "$opt" in
-	d) depsfile="${OPTARG}" ;;
-	i) infile="${OPTARG}" ;;
-	o) outfile="${OPTARG}" ;;
-	-)
-	    case "${OPTARG}" in
-		add-gnu-debuglink) add_gnu_debuglink=true ;;
-		keep-mini-debug-info) keep_mini_debug_info=true ;;
-		keep-symbols) keep_symbols=true ;;
-		remove-build-id) remove_build_id=true ;;
-		*) echo "Unknown option --${OPTARG}"; usage ;;
-	    esac;;
-	?) usage ;;
-	*) echo "'${opt}' '${OPTARG}'"
+        d) depsfile="${OPTARG}" ;;
+        i) infile="${OPTARG}" ;;
+        o) outfile="${OPTARG}" ;;
+        k) symbols_to_keep="${OPTARG}" ;;
+        -)
+            case "${OPTARG}" in
+                add-gnu-debuglink) add_gnu_debuglink=true ;;
+                keep-mini-debug-info) keep_mini_debug_info=true ;;
+                keep-symbols) keep_symbols=true ;;
+                remove-build-id) remove_build_id=true ;;
+                use-gnu-strip) use_gnu_strip=true ;;
+                *) echo "Unknown option --${OPTARG}"; usage ;;
+            esac;;
+        ?) usage ;;
+        *) echo "'${opt}' '${OPTARG}'"
     esac
 done
 
@@ -160,6 +177,11 @@
     usage
 fi
 
+if [ ! -z "${symbols_to_keep}" -a ! -z "${keep_symbols}" ]; then
+    echo "--keep-symbols and -k cannot be used together"
+    usage
+fi
+
 if [ ! -z "${add_gnu_debuglink}" -a ! -z "${keep_mini_debug_info}" ]; then
     echo "--add-gnu-debuglink cannot be used with --keep-mini-debug-info"
     usage
@@ -169,6 +191,8 @@
 
 if [ ! -z "${keep_symbols}" ]; then
     do_strip_keep_symbols
+elif [ ! -z "${symbols_to_keep}" ]; then
+    do_strip_keep_symbol_list
 elif [ ! -z "${keep_mini_debug_info}" ]; then
     do_strip_keep_mini_debug_info
 else
diff --git a/ui/build/build.go b/ui/build/build.go
index 0ae06d6..59d1474 100644
--- a/ui/build/build.go
+++ b/ui/build/build.go
@@ -166,11 +166,13 @@
 		runMakeProductConfig(ctx, config)
 	}
 
-	if inList("installclean", config.Arguments()) {
+	if inList("installclean", config.Arguments()) ||
+		inList("install-clean", config.Arguments()) {
 		installClean(ctx, config, what)
 		ctx.Println("Deleted images and staging directories.")
 		return
-	} else if inList("dataclean", config.Arguments()) {
+	} else if inList("dataclean", config.Arguments()) ||
+		inList("data-clean", config.Arguments()) {
 		dataClean(ctx, config, what)
 		ctx.Println("Deleted data files.")
 		return
diff --git a/ui/build/paths/config.go b/ui/build/paths/config.go
index ed2d9ca..54006d2 100644
--- a/ui/build/paths/config.go
+++ b/ui/build/paths/config.go
@@ -74,13 +74,16 @@
 }
 
 var Configuration = map[string]PathConfig{
-	"bash":     Allowed,
-	"bc":       Allowed,
+	"bash": Allowed,
+	"bc":   Allowed,
+	// We need bzip2 here even though we provide a bzip2 binary because
+	// GNU tar seems to avoid calling ours.
 	"bzip2":    Allowed,
 	"date":     Allowed,
 	"dd":       Allowed,
 	"diff":     Allowed,
 	"egrep":    Allowed,
+	"expr":     Allowed,
 	"find":     Allowed,
 	"fuser":    Allowed,
 	"getopt":   Allowed,
@@ -104,7 +107,6 @@
 	"timeout":  Allowed,
 	"tr":       Allowed,
 	"unzip":    Allowed,
-	"xz":       Allowed,
 	"zip":      Allowed,
 	"zipinfo":  Allowed,
 
@@ -134,7 +136,6 @@
 	"du":        LinuxOnlyPrebuilt,
 	"echo":      LinuxOnlyPrebuilt,
 	"env":       LinuxOnlyPrebuilt,
-	"expr":      LinuxOnlyPrebuilt,
 	"head":      LinuxOnlyPrebuilt,
 	"getconf":   LinuxOnlyPrebuilt,
 	"hostname":  LinuxOnlyPrebuilt,