Merge "prevent module being enabled if in existing BUILD file"
diff --git a/METADATA b/METADATA
new file mode 100644
index 0000000..caa2a95
--- /dev/null
+++ b/METADATA
@@ -0,0 +1 @@
+name: "Android"
diff --git a/android/arch.go b/android/arch.go
index 0f07b26..8aa8d40 100644
--- a/android/arch.go
+++ b/android/arch.go
@@ -22,6 +22,7 @@
 	"strings"
 
 	"android/soong/bazel"
+	"android/soong/starlark_fmt"
 
 	"github.com/google/blueprint"
 	"github.com/google/blueprint/bootstrap"
@@ -1794,14 +1795,9 @@
 		}
 	}
 
-	if a.ArchVariant == "" {
-		// Set ArchFeatures from the default arch features.
-		if featureMap, ok := defaultArchFeatureMap[os]; ok {
-			a.ArchFeatures = featureMap[archType]
-		}
-	} else {
-		// Set ArchFeatures from the arch type.
-		if featureMap, ok := archFeatureMap[archType]; ok {
+	// Set ArchFeatures from the arch type. for Android OS, other os-es do not specify features
+	if os == Android {
+		if featureMap, ok := androidArchFeatureMap[archType]; ok {
 			a.ArchFeatures = featureMap[a.ArchVariant]
 		}
 	}
@@ -2239,3 +2235,40 @@
 
 	return value
 }
+
+func printArchTypeStarlarkDict(dict map[ArchType][]string) string {
+	valDict := make(map[string]string, len(dict))
+	for k, v := range dict {
+		valDict[k.String()] = starlark_fmt.PrintStringList(v, 1)
+	}
+	return starlark_fmt.PrintDict(valDict, 0)
+}
+
+func printArchTypeNestedStarlarkDict(dict map[ArchType]map[string][]string) string {
+	valDict := make(map[string]string, len(dict))
+	for k, v := range dict {
+		valDict[k.String()] = starlark_fmt.PrintStringListDict(v, 1)
+	}
+	return starlark_fmt.PrintDict(valDict, 0)
+}
+
+func StarlarkArchConfigurations() string {
+	return fmt.Sprintf(`
+_arch_to_variants = %s
+
+_arch_to_cpu_variants = %s
+
+_arch_to_features = %s
+
+_android_arch_feature_for_arch_variant = %s
+
+arch_to_variants = _arch_to_variants
+arch_to_cpu_variants = _arch_to_cpu_variants
+arch_to_features = _arch_to_features
+android_arch_feature_for_arch_variants = _android_arch_feature_for_arch_variant
+`, printArchTypeStarlarkDict(archVariants),
+		printArchTypeStarlarkDict(cpuVariants),
+		printArchTypeStarlarkDict(archFeatures),
+		printArchTypeNestedStarlarkDict(androidArchFeatureMap),
+	)
+}
diff --git a/android/arch_list.go b/android/arch_list.go
index 79ad4af..cbf8e7a 100644
--- a/android/arch_list.go
+++ b/android/arch_list.go
@@ -14,8 +14,6 @@
 
 package android
 
-import "fmt"
-
 var archVariants = map[ArchType][]string{
 	Arm: {
 		"armv7-a",
@@ -128,7 +126,7 @@
 	},
 }
 
-var archFeatureMap = map[ArchType]map[string][]string{
+var androidArchFeatureMap = map[ArchType]map[string][]string{
 	Arm: {
 		"armv7-a-neon": {
 			"neon",
@@ -279,6 +277,13 @@
 		},
 	},
 	X86_64: {
+		"" /*default */ : {
+			"ssse3",
+			"sse4",
+			"sse4_1",
+			"sse4_2",
+			"popcnt",
+		},
 		"amberlake": {
 			"ssse3",
 			"sse4",
@@ -398,23 +403,3 @@
 		},
 	},
 }
-
-var defaultArchFeatureMap = map[OsType]map[ArchType][]string{}
-
-// RegisterDefaultArchVariantFeatures is called by files that define Toolchains to specify the
-// arch features that are available for the default arch variant.  It must be called from an
-// init() function.
-func RegisterDefaultArchVariantFeatures(os OsType, arch ArchType, features ...string) {
-	checkCalledFromInit()
-
-	for _, feature := range features {
-		if !InList(feature, archFeatures[arch]) {
-			panic(fmt.Errorf("Invalid feature %q for arch %q variant \"\"", feature, arch))
-		}
-	}
-
-	if defaultArchFeatureMap[os] == nil {
-		defaultArchFeatureMap[os] = make(map[ArchType][]string)
-	}
-	defaultArchFeatureMap[os][arch] = features
-}
diff --git a/android/arch_test.go b/android/arch_test.go
index a828321..7caf837 100644
--- a/android/arch_test.go
+++ b/android/arch_test.go
@@ -491,11 +491,9 @@
 			arch: {
 				arm: {
 					a:  ["arm"],
-					armv7_a_neon: { a: ["armv7_a_neon"] },
 				},
 				arm64: {
 					a:  ["arm64"],
-					armv8_a: { a: ["armv8_a"] },
 				},
 				x86: { a:  ["x86"] },
 				x86_64: { a:  ["x86_64"] },
@@ -552,12 +550,12 @@
 				{
 					module:   "foo",
 					variant:  "android_arm64_armv8-a",
-					property: []string{"root", "linux", "bionic", "android", "android64", "arm64", "armv8_a", "lib64", "android_arm64"},
+					property: []string{"root", "linux", "bionic", "android", "android64", "arm64", "lib64", "android_arm64"},
 				},
 				{
 					module:   "foo",
 					variant:  "android_arm_armv7-a-neon",
-					property: []string{"root", "linux", "bionic", "android", "android64", "arm", "armv7_a_neon", "lib32", "android_arm"},
+					property: []string{"root", "linux", "bionic", "android", "android64", "arm", "lib32", "android_arm"},
 				},
 			},
 		},
diff --git a/android/bazel.go b/android/bazel.go
index e84eb68..efcdf6e 100644
--- a/android/bazel.go
+++ b/android/bazel.go
@@ -227,6 +227,7 @@
 
 		"prebuilts/gcc":/* recursive = */ true,
 		"prebuilts/build-tools":/* recursive = */ false,
+		"prebuilts/jdk/jdk11":/* recursive = */ false,
 		"prebuilts/sdk":/* recursive = */ false,
 		"prebuilts/sdk/current/extras/app-toolkit":/* recursive = */ false,
 		"prebuilts/sdk/current/support":/* recursive = */ false,
@@ -245,6 +246,7 @@
 		"build/bazel/examples/soong_config_variables":        Bp2BuildDefaultTrueRecursively,
 		"build/bazel/examples/apex/minimal":                  Bp2BuildDefaultTrueRecursively,
 		"build/make/tools/signapk":                           Bp2BuildDefaultTrue,
+		"build/make/target/product/security":                 Bp2BuildDefaultTrue,
 		"build/soong":                                        Bp2BuildDefaultTrue,
 		"build/soong/cc/libbuildversion":                     Bp2BuildDefaultTrue, // Skip tests subdir
 		"build/soong/cc/ndkstubgen":                          Bp2BuildDefaultTrue,
@@ -325,6 +327,7 @@
 		"external/zstd":                                      Bp2BuildDefaultTrueRecursively,
 		"frameworks/base/media/tests/MediaDump":              Bp2BuildDefaultTrue,
 		"frameworks/base/startop/apps/test":                  Bp2BuildDefaultTrue,
+		"frameworks/base/tests/appwidgets/AppWidgetHostTest": Bp2BuildDefaultTrueRecursively,
 		"frameworks/native/libs/adbd_auth":                   Bp2BuildDefaultTrueRecursively,
 		"frameworks/native/opengl/tests/gl2_cameraeye":       Bp2BuildDefaultTrue,
 		"frameworks/native/opengl/tests/gl2_java":            Bp2BuildDefaultTrue,
diff --git a/android/licenses.go b/android/licenses.go
index b51a06b..e60c7a2 100644
--- a/android/licenses.go
+++ b/android/licenses.go
@@ -333,4 +333,6 @@
 	ctx.Strict("HTMLNOTICE", ctx.Config().HostToolPath(ctx, "htmlnotice").String())
 	ctx.Strict("XMLNOTICE", ctx.Config().HostToolPath(ctx, "xmlnotice").String())
 	ctx.Strict("TEXTNOTICE", ctx.Config().HostToolPath(ctx, "textnotice").String())
+	ctx.Strict("COMPLIANCENOTICE_BOM", ctx.Config().HostToolPath(ctx, "compliancenotice_bom").String())
+	ctx.Strict("COMPLIANCENOTICE_SHIPPEDLIBS", ctx.Config().HostToolPath(ctx, "compliancenotice_shippedlibs").String())
 }
diff --git a/apex/apex.go b/apex/apex.go
index fe4c205..9031a4e 100644
--- a/apex/apex.go
+++ b/apex/apex.go
@@ -108,15 +108,6 @@
 
 	Multilib apexMultilibProperties
 
-	// List of bootclasspath fragments that are embedded inside this APEX bundle.
-	Bootclasspath_fragments []string
-
-	// List of systemserverclasspath fragments that are embedded inside this APEX bundle.
-	Systemserverclasspath_fragments []string
-
-	// List of java libraries that are embedded inside this APEX bundle.
-	Java_libs []string
-
 	// List of sh binaries that are embedded inside this APEX bundle.
 	Sh_binaries []string
 
@@ -316,6 +307,15 @@
 	// List of BPF programs inside this APEX bundle.
 	Bpfs []string
 
+	// List of bootclasspath fragments that are embedded inside this APEX bundle.
+	Bootclasspath_fragments []string
+
+	// List of systemserverclasspath fragments that are embedded inside this APEX bundle.
+	Systemserverclasspath_fragments []string
+
+	// List of java libraries that are embedded inside this APEX bundle.
+	Java_libs []string
+
 	// Names of modules to be overridden. Listed modules can only be other binaries (in Make or
 	// Soong). This does not completely prevent installation of the overridden binaries, but if
 	// both binaries would be installed by default (in PRODUCT_PACKAGES) the other binary will
@@ -787,9 +787,6 @@
 
 	// Common-arch dependencies come next
 	commonVariation := ctx.Config().AndroidCommonTarget.Variations()
-	ctx.AddFarVariationDependencies(commonVariation, bcpfTag, a.properties.Bootclasspath_fragments...)
-	ctx.AddFarVariationDependencies(commonVariation, sscpfTag, a.properties.Systemserverclasspath_fragments...)
-	ctx.AddFarVariationDependencies(commonVariation, javaLibTag, a.properties.Java_libs...)
 	ctx.AddFarVariationDependencies(commonVariation, fsTag, a.properties.Filesystems...)
 	ctx.AddFarVariationDependencies(commonVariation, compatConfigTag, a.properties.Compat_configs...)
 
@@ -817,6 +814,9 @@
 	ctx.AddFarVariationDependencies(commonVariation, androidAppTag, a.overridableProperties.Apps...)
 	ctx.AddFarVariationDependencies(commonVariation, bpfTag, a.overridableProperties.Bpfs...)
 	ctx.AddFarVariationDependencies(commonVariation, rroTag, a.overridableProperties.Rros...)
+	ctx.AddFarVariationDependencies(commonVariation, bcpfTag, a.overridableProperties.Bootclasspath_fragments...)
+	ctx.AddFarVariationDependencies(commonVariation, sscpfTag, a.overridableProperties.Systemserverclasspath_fragments...)
+	ctx.AddFarVariationDependencies(commonVariation, javaLibTag, a.overridableProperties.Java_libs...)
 	if prebuilts := a.overridableProperties.Prebuilts; len(prebuilts) > 0 {
 		// For prebuilt_etc, use the first variant (64 on 64/32bit device, 32 on 32bit device)
 		// regardless of the TARGET_PREFER_* setting. See b/144532908
@@ -2595,9 +2595,9 @@
 
 // Collect information for opening IDE project files in java/jdeps.go.
 func (a *apexBundle) IDEInfo(dpInfo *android.IdeInfo) {
-	dpInfo.Deps = append(dpInfo.Deps, a.properties.Java_libs...)
-	dpInfo.Deps = append(dpInfo.Deps, a.properties.Bootclasspath_fragments...)
-	dpInfo.Deps = append(dpInfo.Deps, a.properties.Systemserverclasspath_fragments...)
+	dpInfo.Deps = append(dpInfo.Deps, a.overridableProperties.Java_libs...)
+	dpInfo.Deps = append(dpInfo.Deps, a.overridableProperties.Bootclasspath_fragments...)
+	dpInfo.Deps = append(dpInfo.Deps, a.overridableProperties.Systemserverclasspath_fragments...)
 	dpInfo.Paths = append(dpInfo.Paths, a.modulePaths...)
 }
 
diff --git a/apex/apex_test.go b/apex/apex_test.go
index f6b840f..1c36c75 100644
--- a/apex/apex_test.go
+++ b/apex/apex_test.go
@@ -6091,6 +6091,9 @@
 			apps: ["app"],
 			bpfs: ["bpf"],
 			prebuilts: ["myetc"],
+			bootclasspath_fragments: ["mybootclasspath_fragment"],
+			systemserverclasspath_fragments: ["mysystemserverclasspath_fragment"],
+			java_libs: ["myjava_library"],
 			overrides: ["oldapex"],
 			updatable: false,
 		}
@@ -6101,6 +6104,9 @@
 			apps: ["override_app"],
 			bpfs: ["override_bpf"],
 			prebuilts: ["override_myetc"],
+			bootclasspath_fragments: ["override_bootclasspath_fragment"],
+			systemserverclasspath_fragments: ["override_systemserverclasspath_fragment"],
+			java_libs: ["override_java_library"],
 			overrides: ["unknownapex"],
 			logging_parent: "com.foo.bar",
 			package_name: "test.overridden.package",
@@ -6159,6 +6165,72 @@
 			name: "override_myetc",
 			src: "override_myprebuilt",
 		}
+
+		java_library {
+			name: "bcplib",
+			srcs: ["a.java"],
+			compile_dex: true,
+			apex_available: ["myapex"],
+			permitted_packages: ["bcp.lib"],
+		}
+
+		bootclasspath_fragment {
+			name: "mybootclasspath_fragment",
+			contents: ["bcplib"],
+			apex_available: ["myapex"],
+		}
+
+		java_library {
+			name: "override_bcplib",
+			srcs: ["a.java"],
+			compile_dex: true,
+			apex_available: ["myapex"],
+			permitted_packages: ["override.bcp.lib"],
+		}
+
+		bootclasspath_fragment {
+			name: "override_bootclasspath_fragment",
+			contents: ["override_bcplib"],
+			apex_available: ["myapex"],
+		}
+
+		java_library {
+			name: "systemserverlib",
+			srcs: ["a.java"],
+			apex_available: ["myapex"],
+		}
+
+		systemserverclasspath_fragment {
+			name: "mysystemserverclasspath_fragment",
+			standalone_contents: ["systemserverlib"],
+			apex_available: ["myapex"],
+		}
+
+		java_library {
+			name: "override_systemserverlib",
+			srcs: ["a.java"],
+			apex_available: ["myapex"],
+		}
+
+		systemserverclasspath_fragment {
+			name: "override_systemserverclasspath_fragment",
+			standalone_contents: ["override_systemserverlib"],
+			apex_available: ["myapex"],
+		}
+
+		java_library {
+			name: "myjava_library",
+			srcs: ["a.java"],
+			compile_dex: true,
+			apex_available: ["myapex"],
+		}
+
+		java_library {
+			name: "override_java_library",
+			srcs: ["a.java"],
+			compile_dex: true,
+			apex_available: ["myapex"],
+		}
 	`, withManifestPackageNameOverrides([]string{"myapex:com.android.myapex"}))
 
 	originalVariant := ctx.ModuleForTests("myapex", "android_common_myapex_image").Module().(android.OverridableModule)
@@ -6193,6 +6265,13 @@
 		t.Errorf("override_myapex should have logging parent (com.foo.bar), but was %q.", apexBundle.overridableProperties.Logging_parent)
 	}
 
+	android.AssertArrayString(t, "Bootclasspath_fragments does not match",
+		[]string{"override_bootclasspath_fragment"}, apexBundle.overridableProperties.Bootclasspath_fragments)
+	android.AssertArrayString(t, "Systemserverclasspath_fragments does not match",
+		[]string{"override_systemserverclasspath_fragment"}, apexBundle.overridableProperties.Systemserverclasspath_fragments)
+	android.AssertArrayString(t, "Java_libs does not match",
+		[]string{"override_java_library"}, apexBundle.overridableProperties.Java_libs)
+
 	optFlags := apexRule.Args["opt_flags"]
 	ensureContains(t, optFlags, "--override_apk_package_name test.overridden.package")
 	ensureContains(t, optFlags, "--pubkey testkey2.avbpubkey")
@@ -6207,12 +6286,18 @@
 	ensureContains(t, androidMk, "LOCAL_MODULE := override_app.override_myapex")
 	ensureContains(t, androidMk, "LOCAL_MODULE := override_bpf.o.override_myapex")
 	ensureContains(t, androidMk, "LOCAL_MODULE := apex_manifest.pb.override_myapex")
+	ensureContains(t, androidMk, "LOCAL_MODULE := override_bcplib.override_myapex")
+	ensureContains(t, androidMk, "LOCAL_MODULE := override_systemserverlib.override_myapex")
+	ensureContains(t, androidMk, "LOCAL_MODULE := override_java_library.override_myapex")
 	ensureContains(t, androidMk, "LOCAL_MODULE_STEM := override_myapex.apex")
 	ensureContains(t, androidMk, "LOCAL_OVERRIDES_MODULES := unknownapex myapex")
 	ensureNotContains(t, androidMk, "LOCAL_MODULE := app.myapex")
 	ensureNotContains(t, androidMk, "LOCAL_MODULE := bpf.myapex")
 	ensureNotContains(t, androidMk, "LOCAL_MODULE := override_app.myapex")
 	ensureNotContains(t, androidMk, "LOCAL_MODULE := apex_manifest.pb.myapex")
+	ensureNotContains(t, androidMk, "LOCAL_MODULE := override_bcplib.myapex")
+	ensureNotContains(t, androidMk, "LOCAL_MODULE := override_systemserverlib.myapex")
+	ensureNotContains(t, androidMk, "LOCAL_MODULE := override_java_library.pb.myapex")
 	ensureNotContains(t, androidMk, "LOCAL_MODULE_STEM := myapex.apex")
 }
 
diff --git a/bp2build/conversion.go b/bp2build/conversion.go
index 96c12d3..3ab846b 100644
--- a/bp2build/conversion.go
+++ b/bp2build/conversion.go
@@ -28,6 +28,8 @@
 
 	files = append(files, newFile("product_config", "soong_config_variables.bzl", cfg.Bp2buildSoongConfigDefinitions.String()))
 
+	files = append(files, newFile("product_config", "arch_configuration.bzl", android.StarlarkArchConfigurations()))
+
 	apiLevelsContent, err := json.Marshal(android.GetApiLevelsMap(cfg))
 	if err != nil {
 		panic(err)
diff --git a/bp2build/conversion_test.go b/bp2build/conversion_test.go
index 629ca9b..c94a923 100644
--- a/bp2build/conversion_test.go
+++ b/bp2build/conversion_test.go
@@ -103,6 +103,10 @@
 			basename: "soong_config_variables.bzl",
 		},
 		{
+			dir:      "product_config",
+			basename: "arch_configuration.bzl",
+		},
+		{
 			dir:      "api_levels",
 			basename: GeneratedBuildFileName,
 		},
diff --git a/cc/config/arm64_device.go b/cc/config/arm64_device.go
index 979c825..4d0ae1a 100644
--- a/cc/config/arm64_device.go
+++ b/cc/config/arm64_device.go
@@ -104,19 +104,22 @@
 	exportStringListStaticVariable("Arm64Cflags", arm64Cflags)
 	exportStringListStaticVariable("Arm64Cppflags", arm64Cppflags)
 
-	exportedStringListDictVars.Set("Arm64ArchVariantCflags", arm64ArchVariantCflags)
-	exportedStringListDictVars.Set("Arm64CpuVariantCflags", arm64CpuVariantCflags)
+	exportedVariableReferenceDictVars.Set("Arm64ArchVariantCflags", arm64ArchVariantCflagsVar)
+	exportedVariableReferenceDictVars.Set("Arm64CpuVariantCflags", arm64CpuVariantCflagsVar)
+	exportedVariableReferenceDictVars.Set("Arm64CpuVariantLdflags", arm64CpuVariantLdflags)
 
-	pctx.StaticVariable("Arm64Armv8ACflags", strings.Join(arm64ArchVariantCflags["armv8-a"], " "))
-	pctx.StaticVariable("Arm64Armv8ABranchProtCflags", strings.Join(arm64ArchVariantCflags["armv8-a-branchprot"], " "))
-	pctx.StaticVariable("Arm64Armv82ACflags", strings.Join(arm64ArchVariantCflags["armv8-2a"], " "))
-	pctx.StaticVariable("Arm64Armv82ADotprodCflags", strings.Join(arm64ArchVariantCflags["armv8-2a-dotprod"], " "))
+	exportStringListStaticVariable("Arm64Armv8ACflags", arm64ArchVariantCflags["armv8-a"])
+	exportStringListStaticVariable("Arm64Armv8ABranchProtCflags", arm64ArchVariantCflags["armv8-a-branchprot"])
+	exportStringListStaticVariable("Arm64Armv82ACflags", arm64ArchVariantCflags["armv8-2a"])
+	exportStringListStaticVariable("Arm64Armv82ADotprodCflags", arm64ArchVariantCflags["armv8-2a-dotprod"])
 
-	pctx.StaticVariable("Arm64CortexA53Cflags", strings.Join(arm64CpuVariantCflags["cortex-a53"], " "))
-	pctx.StaticVariable("Arm64CortexA55Cflags", strings.Join(arm64CpuVariantCflags["cortex-a55"], " "))
-	pctx.StaticVariable("Arm64KryoCflags", strings.Join(arm64CpuVariantCflags["kryo"], " "))
-	pctx.StaticVariable("Arm64ExynosM1Cflags", strings.Join(arm64CpuVariantCflags["exynos-m1"], " "))
-	pctx.StaticVariable("Arm64ExynosM2Cflags", strings.Join(arm64CpuVariantCflags["exynos-m2"], " "))
+	exportStringListStaticVariable("Arm64CortexA53Cflags", arm64CpuVariantCflags["cortex-a53"])
+	exportStringListStaticVariable("Arm64CortexA55Cflags", arm64CpuVariantCflags["cortex-a55"])
+	exportStringListStaticVariable("Arm64KryoCflags", arm64CpuVariantCflags["kryo"])
+	exportStringListStaticVariable("Arm64ExynosM1Cflags", arm64CpuVariantCflags["exynos-m1"])
+	exportStringListStaticVariable("Arm64ExynosM2Cflags", arm64CpuVariantCflags["exynos-m2"])
+
+	exportStringListStaticVariable("Arm64FixCortexA53Ldflags", []string{"-Wl,--fix-cortex-a53-843419"})
 }
 
 var (
@@ -128,7 +131,6 @@
 	}
 
 	arm64CpuVariantCflagsVar = map[string]string{
-		"":           "",
 		"cortex-a53": "${config.Arm64CortexA53Cflags}",
 		"cortex-a55": "${config.Arm64CortexA55Cflags}",
 		"cortex-a72": "${config.Arm64CortexA53Cflags}",
@@ -140,6 +142,15 @@
 		"exynos-m1":  "${config.Arm64ExynosM1Cflags}",
 		"exynos-m2":  "${config.Arm64ExynosM2Cflags}",
 	}
+
+	arm64CpuVariantLdflags = map[string]string{
+		"cortex-a53": "${config.Arm64FixCortexA53Ldflags}",
+		"cortex-a72": "${config.Arm64FixCortexA53Ldflags}",
+		"cortex-a73": "${config.Arm64FixCortexA53Ldflags}",
+		"kryo":       "${config.Arm64FixCortexA53Ldflags}",
+		"exynos-m1":  "${config.Arm64FixCortexA53Ldflags}",
+		"exynos-m2":  "${config.Arm64FixCortexA53Ldflags}",
+	}
 )
 
 type toolchainArm64 struct {
@@ -214,12 +225,7 @@
 	toolchainCflags = append(toolchainCflags,
 		variantOrDefault(arm64CpuVariantCflagsVar, arch.CpuVariant))
 
-	var extraLdflags string
-	switch arch.CpuVariant {
-	case "cortex-a53", "cortex-a72", "cortex-a73", "kryo", "exynos-m1", "exynos-m2":
-		extraLdflags = "-Wl,--fix-cortex-a53-843419"
-	}
-
+	extraLdflags := variantOrDefault(arm64CpuVariantLdflags, arch.CpuVariant)
 	return &toolchainArm64{
 		ldflags: strings.Join([]string{
 			"${config.Arm64Ldflags}",
diff --git a/cc/config/arm_device.go b/cc/config/arm_device.go
index 0fe5e68..4466632 100644
--- a/cc/config/arm_device.go
+++ b/cc/config/arm_device.go
@@ -39,6 +39,10 @@
 
 	armLldflags = armLdflags
 
+	armFixCortexA8LdFlags = []string{"-Wl,--fix-cortex-a8"}
+
+	armNoFixCortexA8LdFlags = []string{"-Wl,--no-fix-cortex-a8"}
+
 	armArmCflags = []string{
 		"-fstrict-aliasing",
 	}
@@ -179,6 +183,9 @@
 	exportStringListStaticVariable("ArmLdflags", armLdflags)
 	exportStringListStaticVariable("ArmLldflags", armLldflags)
 
+	exportStringListStaticVariable("ArmFixCortexA8LdFlags", armFixCortexA8LdFlags)
+	exportStringListStaticVariable("ArmNoFixCortexA8LdFlags", armNoFixCortexA8LdFlags)
+
 	// Clang cflags
 	exportStringListStaticVariable("ArmToolchainCflags", armToolchainCflags)
 	exportStringListStaticVariable("ArmCflags", armCflags)
@@ -188,8 +195,8 @@
 	exportStringListStaticVariable("ArmArmCflags", armArmCflags)
 	exportStringListStaticVariable("ArmThumbCflags", armThumbCflags)
 
-	exportedStringListDictVars.Set("ArmArchVariantCflags", armArchVariantCflags)
-	exportedStringListDictVars.Set("ArmCpuVariantCflags", armCpuVariantCflags)
+	exportedVariableReferenceDictVars.Set("ArmArchVariantCflags", armArchVariantCflagsVar)
+	exportedVariableReferenceDictVars.Set("ArmCpuVariantCflags", armCpuVariantCflagsVar)
 
 	// Clang arch variant cflags
 	exportStringListStaticVariable("ArmArmv7ACflags", armArchVariantCflags["armv7-a"])
@@ -324,12 +331,12 @@
 		switch arch.CpuVariant {
 		case "cortex-a8", "":
 			// Generic ARM might be a Cortex A8 -- better safe than sorry
-			fixCortexA8 = "-Wl,--fix-cortex-a8"
+			fixCortexA8 = "${config.ArmFixCortexA8LdFlags}"
 		default:
-			fixCortexA8 = "-Wl,--no-fix-cortex-a8"
+			fixCortexA8 = "${config.ArmNoFixCortexA8LdFlags}"
 		}
 	case "armv7-a":
-		fixCortexA8 = "-Wl,--fix-cortex-a8"
+		fixCortexA8 = "${config.ArmFixCortexA8LdFlags}"
 	case "armv8-a", "armv8-2a":
 		// Nothing extra for armv8-a/armv8-2a
 	default:
diff --git a/cc/config/bp2build.go b/cc/config/bp2build.go
index eca5161..73f65f5 100644
--- a/cc/config/bp2build.go
+++ b/cc/config/bp2build.go
@@ -38,6 +38,8 @@
 	exportedStringListVars     = exportedStringListVariables{}
 	exportedStringVars         = exportedStringVariables{}
 	exportedStringListDictVars = exportedStringListDictVariables{}
+	// Note: these can only contain references to other variables and must be printed last
+	exportedVariableReferenceDictVars = exportedVariableReferenceDictVariables{}
 
 	/// Maps containing variables that are dependent on the build config.
 	exportedConfigDependingVars = exportedConfigDependingVariables{}
@@ -62,6 +64,7 @@
 type bazelConstant struct {
 	variableName       string
 	internalDefinition string
+	sortLast           bool
 }
 
 type exportedStringVariables map[string]string
@@ -168,6 +171,36 @@
 	return ret
 }
 
+type exportedVariableReferenceDictVariables map[string]map[string]string
+
+func (m exportedVariableReferenceDictVariables) Set(k string, v map[string]string) {
+	m[k] = v
+}
+
+func (m exportedVariableReferenceDictVariables) asBazel(_ android.Config, _ exportedStringVariables,
+	_ exportedStringListVariables, _ exportedConfigDependingVariables) []bazelConstant {
+	ret := make([]bazelConstant, 0, len(m))
+	for n, dict := range m {
+		for k, v := range dict {
+			matches, err := variableReference(v)
+			if err != nil {
+				panic(err)
+			} else if !matches.matches {
+				panic(fmt.Errorf("Expected a variable reference, got %q", v))
+			} else if len(matches.fullVariableReference) != len(v) {
+				panic(fmt.Errorf("Expected only a variable reference, got %q", v))
+			}
+			dict[k] = "_" + matches.variable
+		}
+		ret = append(ret, bazelConstant{
+			variableName:       n,
+			internalDefinition: starlark_fmt.PrintDict(dict, 0),
+			sortLast:           true,
+		})
+	}
+	return ret
+}
+
 // BazelCcToolchainVars generates bzl file content containing variables for
 // Bazel's cc_toolchain configuration.
 func BazelCcToolchainVars(config android.Config) string {
@@ -175,7 +208,8 @@
 		config,
 		exportedStringListDictVars,
 		exportedStringListVars,
-		exportedStringVars)
+		exportedStringVars,
+		exportedVariableReferenceDictVars)
 }
 
 func bazelToolchainVars(config android.Config, vars ...bazelVarExporter) string {
@@ -186,7 +220,12 @@
 		results = append(results, v.asBazel(config, exportedStringVars, exportedStringListVars, exportedConfigDependingVars)...)
 	}
 
-	sort.Slice(results, func(i, j int) bool { return results[i].variableName < results[j].variableName })
+	sort.Slice(results, func(i, j int) bool {
+		if results[i].sortLast != results[j].sortLast {
+			return !results[i].sortLast
+		}
+		return results[i].variableName < results[j].variableName
+	})
 
 	definitions := make([]string, 0, len(results))
 	constants := make([]string, 0, len(results))
@@ -207,6 +246,32 @@
 	return ret
 }
 
+type match struct {
+	matches               bool
+	fullVariableReference string
+	variable              string
+}
+
+func variableReference(input string) (match, error) {
+	// e.g. "${ExternalCflags}"
+	r := regexp.MustCompile(`\${(?:config\.)?([a-zA-Z0-9_]+)}`)
+
+	matches := r.FindStringSubmatch(input)
+	if len(matches) == 0 {
+		return match{}, nil
+	}
+	if len(matches) != 2 {
+		return match{}, fmt.Errorf("Expected to only match 1 subexpression in %s, got %d", input, len(matches)-1)
+	}
+	return match{
+		matches:               true,
+		fullVariableReference: matches[0],
+		// Index 1 of FindStringSubmatch contains the subexpression match
+		// (variable name) of the capture group.
+		variable: matches[1],
+	}, nil
+}
+
 // expandVar recursively expand interpolated variables in the exportedVars scope.
 //
 // We're using a string slice to track the seen variables to avoid
@@ -216,8 +281,6 @@
 // interpolation stacks are deep (n > 1).
 func expandVar(config android.Config, toExpand string, stringScope exportedStringVariables,
 	stringListScope exportedStringListVariables, exportedVars exportedConfigDependingVariables) ([]string, error) {
-	// e.g. "${ExternalCflags}"
-	r := regexp.MustCompile(`\${([a-zA-Z0-9_]+)}`)
 
 	// Internal recursive function.
 	var expandVarInternal func(string, map[string]bool) (string, error)
@@ -225,20 +288,18 @@
 		var ret string
 		remainingString := toExpand
 		for len(remainingString) > 0 {
-			matches := r.FindStringSubmatch(remainingString)
-			if len(matches) == 0 {
+			matches, err := variableReference(remainingString)
+			if err != nil {
+				panic(err)
+			}
+			if !matches.matches {
 				return ret + remainingString, nil
 			}
-			if len(matches) != 2 {
-				panic(fmt.Errorf("Expected to only match 1 subexpression in %s, got %d", remainingString, len(matches)-1))
-			}
-			matchIndex := strings.Index(remainingString, matches[0])
+			matchIndex := strings.Index(remainingString, matches.fullVariableReference)
 			ret += remainingString[:matchIndex]
-			remainingString = remainingString[matchIndex+len(matches[0]):]
+			remainingString = remainingString[matchIndex+len(matches.fullVariableReference):]
 
-			// Index 1 of FindStringSubmatch contains the subexpression match
-			// (variable name) of the capture group.
-			variable := matches[1]
+			variable := matches.variable
 			// toExpand contains a variable.
 			if _, ok := seenVars[variable]; ok {
 				return ret, fmt.Errorf(
diff --git a/cc/config/bp2build_test.go b/cc/config/bp2build_test.go
index 4cbf0c6..9a8178a 100644
--- a/cc/config/bp2build_test.go
+++ b/cc/config/bp2build_test.go
@@ -48,6 +48,14 @@
 			expectedValues: []string{"bar"},
 		},
 		{
+			description: "single level expansion with short-name for string var",
+			stringScope: exportedStringVariables{
+				"foo": "bar",
+			},
+			toExpand:       "${config.foo}",
+			expectedValues: []string{"bar"},
+		},
+		{
 			description: "single level expansion string list var",
 			stringListScope: exportedStringListVariables{
 				"foo": []string{"bar"},
@@ -224,7 +232,30 @@
 )`,
 		},
 		{
-			name: "sorts across types",
+			name: "exports dict with var refs",
+			vars: []bazelVarExporter{
+				exportedVariableReferenceDictVariables{
+					"a": map[string]string{"b1": "${b2}"},
+					"c": map[string]string{"d1": "${config.d2}"},
+				},
+			},
+			expectedOut: `# GENERATED FOR BAZEL FROM SOONG. DO NOT EDIT.
+
+_a = {
+    "b1": _b2,
+}
+
+_c = {
+    "d1": _d2,
+}
+
+constants = struct(
+    a = _a,
+    c = _c,
+)`,
+		},
+		{
+			name: "sorts across types with variable references last",
 			vars: []bazelVarExporter{
 				exportedStringVariables{
 					"b": "b-val",
@@ -238,6 +269,10 @@
 					"a": map[string][]string{"a1": []string{"a2"}},
 					"f": map[string][]string{"f1": []string{"f2"}},
 				},
+				exportedVariableReferenceDictVariables{
+					"aa": map[string]string{"b1": "${b}"},
+					"cc": map[string]string{"d1": "${config.d}"},
+				},
 			},
 			expectedOut: `# GENERATED FOR BAZEL FROM SOONG. DO NOT EDIT.
 
@@ -257,6 +292,14 @@
     "f1": ["f2"],
 }
 
+_aa = {
+    "b1": _b,
+}
+
+_cc = {
+    "d1": _d,
+}
+
 constants = struct(
     a = _a,
     b = _b,
@@ -264,6 +307,8 @@
     d = _d,
     e = _e,
     f = _f,
+    aa = _aa,
+    cc = _cc,
 )`,
 		},
 	}
diff --git a/cc/config/x86_64_device.go b/cc/config/x86_64_device.go
index 0da51cb..164e7a6 100644
--- a/cc/config/x86_64_device.go
+++ b/cc/config/x86_64_device.go
@@ -78,14 +78,6 @@
 		"popcnt": []string{"-mpopcnt"},
 		"aes_ni": []string{"-maes"},
 	}
-
-	x86_64DefaultArchVariantFeatures = []string{
-		"ssse3",
-		"sse4",
-		"sse4_1",
-		"sse4_2",
-		"popcnt",
-	}
 )
 
 const (
@@ -93,8 +85,6 @@
 )
 
 func init() {
-	android.RegisterDefaultArchVariantFeatures(android.Android, android.X86_64, x86_64DefaultArchVariantFeatures...)
-	exportedStringListVars.Set("X86_64DefaultArchVariantFeatures", x86_64DefaultArchVariantFeatures)
 
 	pctx.StaticVariable("x86_64GccVersion", x86_64GccVersion)
 
diff --git a/java/app.go b/java/app.go
index e4432ff..96fd61a 100755
--- a/java/app.go
+++ b/java/app.go
@@ -1443,7 +1443,7 @@
 
 	props := bazel.BazelTargetModuleProperties{
 		Rule_class:        "android_app_certificate",
-		Bzl_load_location: "//build/bazel/rules:android_app_certificate.bzl",
+		Bzl_load_location: "//build/bazel/rules/android:android_app_certificate.bzl",
 	}
 
 	ctx.CreateBazelTargetModule(props, android.CommonAttributes{Name: module.Name()}, attrs)
@@ -1451,9 +1451,11 @@
 
 type bazelAndroidAppAttributes struct {
 	*javaLibraryAttributes
-	Manifest       bazel.Label
-	Custom_package *string
-	Resource_files bazel.LabelListAttribute
+	Manifest         bazel.Label
+	Custom_package   *string
+	Resource_files   bazel.LabelListAttribute
+	Certificate      *bazel.Label
+	Certificate_name *string
 }
 
 // ConvertWithBp2build is used to convert android_app to Bazel.
@@ -1470,15 +1472,30 @@
 		resourceFiles.Includes = append(resourceFiles.Includes, files...)
 	}
 
+	var certificate *bazel.Label
+	certificateNamePtr := a.overridableAppProperties.Certificate
+	certificateName := proptools.StringDefault(certificateNamePtr, "")
+	certModule := android.SrcIsModule(certificateName)
+	if certModule != "" {
+		c := android.BazelLabelForModuleDepSingle(ctx, certificateName)
+		certificate = &c
+		certificateNamePtr = nil
+	}
+
 	attrs := &bazelAndroidAppAttributes{
 		libAttrs,
 		android.BazelLabelForModuleSrcSingle(ctx, manifest),
 		// TODO(b/209576404): handle package name override by product variable PRODUCT_MANIFEST_PACKAGE_NAME_OVERRIDES
 		a.overridableAppProperties.Package_name,
 		bazel.MakeLabelListAttribute(resourceFiles),
+		certificate,
+		certificateNamePtr,
 	}
-	props := bazel.BazelTargetModuleProperties{Rule_class: "android_binary",
-		Bzl_load_location: "@rules_android//rules:rules.bzl"}
+
+	props := bazel.BazelTargetModuleProperties{
+		Rule_class:        "android_binary",
+		Bzl_load_location: "//build/bazel/rules/android:android_binary.bzl",
+	}
 
 	ctx.CreateBazelTargetModule(props, android.CommonAttributes{Name: a.Name()}, attrs)
 
diff --git a/mk2rbc/mk2rbc.go b/mk2rbc/mk2rbc.go
index 7c1176b..74053fe 100644
--- a/mk2rbc/mk2rbc.go
+++ b/mk2rbc/mk2rbc.go
@@ -807,20 +807,16 @@
 	if len(matchingPaths) > maxMatchingFiles {
 		return []starlarkNode{ctx.newBadNode(v, "there are >%d files matching the pattern, please rewrite it", maxMatchingFiles)}
 	}
-	if len(matchingPaths) == 1 {
-		res := inheritedStaticModule{ctx.newDependentModule(matchingPaths[0], loadAlways && ctx.ifNestLevel == 0), loadAlways}
-		return []starlarkNode{processModule(res)}
-	} else {
-		needsWarning := pathPattern[0] == "" && len(ctx.includeTops) == 0
-		res := inheritedDynamicModule{*varPath, []*moduleInfo{}, loadAlways, ctx.errorLocation(v), needsWarning}
-		for _, p := range matchingPaths {
-			// A product configuration files discovered dynamically may attempt to inherit
-			// from another one which does not exist in this source tree. Prevent load errors
-			// by always loading the dynamic files as optional.
-			res.candidateModules = append(res.candidateModules, ctx.newDependentModule(p, true))
-		}
-		return []starlarkNode{processModule(res)}
+
+	needsWarning := pathPattern[0] == "" && len(ctx.includeTops) == 0
+	res := inheritedDynamicModule{*varPath, []*moduleInfo{}, loadAlways, ctx.errorLocation(v), needsWarning}
+	for _, p := range matchingPaths {
+		// A product configuration files discovered dynamically may attempt to inherit
+		// from another one which does not exist in this source tree. Prevent load errors
+		// by always loading the dynamic files as optional.
+		res.candidateModules = append(res.candidateModules, ctx.newDependentModule(p, true))
 	}
+	return []starlarkNode{processModule(res)}
 }
 
 func (ctx *parseContext) findMatchingPaths(pattern []string) []string {
diff --git a/mk2rbc/mk2rbc_test.go b/mk2rbc/mk2rbc_test.go
index a162021..55d48ff 100644
--- a/mk2rbc/mk2rbc_test.go
+++ b/mk2rbc/mk2rbc_test.go
@@ -1081,7 +1081,13 @@
 def init(g, handle):
   cfg = rblf.cfg(handle)
   g["MY_PATH"] = "foo"
-  rblf.inherit(handle, "vendor/foo1/cfg", _cfg_init)
+  _entry = {
+    "vendor/foo1/cfg.mk": ("vendor/foo1/cfg", _cfg_init),
+  }.get("%s/cfg.mk" % g["MY_PATH"])
+  (_varmod, _varmod_init) = _entry if _entry else (None, None)
+  if not _varmod_init:
+    rblf.mkerror("product.mk", "Cannot find %s" % ("%s/cfg.mk" % g["MY_PATH"]))
+  rblf.inherit(handle, _varmod, _varmod_init)
 `,
 	},
 	{
@@ -1101,8 +1107,20 @@
 def init(g, handle):
   cfg = rblf.cfg(handle)
   g["MY_PATH"] = "foo"
-  rblf.inherit(handle, "vendor/foo1/cfg", _cfg_init)
-  rblf.inherit(handle, "vendor/foo1/cfg", _cfg_init)
+  _entry = {
+    "vendor/foo1/cfg.mk": ("vendor/foo1/cfg", _cfg_init),
+  }.get("%s/cfg.mk" % g["MY_PATH"])
+  (_varmod, _varmod_init) = _entry if _entry else (None, None)
+  if not _varmod_init:
+    rblf.mkerror("product.mk", "Cannot find %s" % ("%s/cfg.mk" % g["MY_PATH"]))
+  rblf.inherit(handle, _varmod, _varmod_init)
+  _entry = {
+    "vendor/foo1/cfg.mk": ("vendor/foo1/cfg", _cfg_init),
+  }.get("%s/cfg.mk" % g["MY_PATH"])
+  (_varmod, _varmod_init) = _entry if _entry else (None, None)
+  if not _varmod_init:
+    rblf.mkerror("product.mk", "Cannot find %s" % ("%s/cfg.mk" % g["MY_PATH"]))
+  rblf.inherit(handle, _varmod, _varmod_init)
 `,
 	},
 	{
@@ -1126,9 +1144,21 @@
 
 def init(g, handle):
   cfg = rblf.cfg(handle)
-  rblf.inherit(handle, "foo/font", _font_init)
+  _entry = {
+    "foo/font.mk": ("foo/font", _font_init),
+  }.get("%s/font.mk" % g.get("MY_VAR", ""))
+  (_varmod, _varmod_init) = _entry if _entry else (None, None)
+  if not _varmod_init:
+    rblf.mkerror("product.mk", "Cannot find %s" % ("%s/font.mk" % g.get("MY_VAR", "")))
+  rblf.inherit(handle, _varmod, _varmod_init)
   # There's some space and even this comment between the include_top and the inherit-product
-  rblf.inherit(handle, "foo/font", _font_init)
+  _entry = {
+    "foo/font.mk": ("foo/font", _font_init),
+  }.get("%s/font.mk" % g.get("MY_VAR", ""))
+  (_varmod, _varmod_init) = _entry if _entry else (None, None)
+  if not _varmod_init:
+    rblf.mkerror("product.mk", "Cannot find %s" % ("%s/font.mk" % g.get("MY_VAR", "")))
+  rblf.inherit(handle, _varmod, _varmod_init)
   rblf.mkwarning("product.mk:11", "Please avoid starting an include path with a variable. See https://source.android.com/setup/build/bazel/product_config/issues/includes for details.")
   _entry = {
     "foo/font.mk": ("foo/font", _font_init),
diff --git a/rust/config/global.go b/rust/config/global.go
index c1ce13f..1cf773e 100644
--- a/rust/config/global.go
+++ b/rust/config/global.go
@@ -24,7 +24,7 @@
 var pctx = android.NewPackageContext("android/soong/rust/config")
 
 var (
-	RustDefaultVersion = "1.58.1"
+	RustDefaultVersion = "1.59.0"
 	RustDefaultBase    = "prebuilts/rust/"
 	DefaultEdition     = "2021"
 	Stdlibs            = []string{
@@ -49,7 +49,7 @@
 		"-C overflow-checks=on",
 		"-C force-unwind-tables=yes",
 		// Use v0 mangling to distinguish from C++ symbols
-		"-Z symbol-mangling-version=v0",
+		"-C symbol-mangling-version=v0",
 	}
 
 	deviceGlobalRustFlags = []string{
diff --git a/rust/fuzz_test.go b/rust/fuzz_test.go
index 98be7c2..865665e 100644
--- a/rust/fuzz_test.go
+++ b/rust/fuzz_test.go
@@ -47,17 +47,17 @@
 	// Check that compiler flags are set appropriately .
 	fuzz_libtest := ctx.ModuleForTests("fuzz_libtest", "android_arm64_armv8-a_fuzzer").Rule("rustc")
 	if !strings.Contains(fuzz_libtest.Args["rustcFlags"], "-Z sanitizer=hwaddress") ||
-		!strings.Contains(fuzz_libtest.Args["rustcFlags"], "-C passes='sancov'") ||
+		!strings.Contains(fuzz_libtest.Args["rustcFlags"], "-C passes='sancov-module'") ||
 		!strings.Contains(fuzz_libtest.Args["rustcFlags"], "--cfg fuzzing") {
-		t.Errorf("rust_fuzz module does not contain the expected flags (sancov, cfg fuzzing, hwaddress sanitizer).")
+		t.Errorf("rust_fuzz module does not contain the expected flags (sancov-module, cfg fuzzing, hwaddress sanitizer).")
 
 	}
 
 	// Check that dependencies have 'fuzzer' variants produced for them as well.
 	libtest_fuzzer := ctx.ModuleForTests("libtest_fuzzing", "android_arm64_armv8-a_rlib_rlib-std_fuzzer").Output("libtest_fuzzing.rlib")
 	if !strings.Contains(libtest_fuzzer.Args["rustcFlags"], "-Z sanitizer=hwaddress") ||
-		!strings.Contains(libtest_fuzzer.Args["rustcFlags"], "-C passes='sancov'") ||
+		!strings.Contains(libtest_fuzzer.Args["rustcFlags"], "-C passes='sancov-module'") ||
 		!strings.Contains(libtest_fuzzer.Args["rustcFlags"], "--cfg fuzzing") {
-		t.Errorf("rust_fuzz dependent library does not contain the expected flags (sancov, cfg fuzzing, hwaddress sanitizer).")
+		t.Errorf("rust_fuzz dependent library does not contain the expected flags (sancov-module, cfg fuzzing, hwaddress sanitizer).")
 	}
 }
diff --git a/rust/sanitize.go b/rust/sanitize.go
index be9dc42..39aaf33 100644
--- a/rust/sanitize.go
+++ b/rust/sanitize.go
@@ -57,7 +57,7 @@
 }
 
 var fuzzerFlags = []string{
-	"-C passes='sancov'",
+	"-C passes='sancov-module'",
 
 	"--cfg fuzzing",
 	"-C llvm-args=-sanitizer-coverage-level=3",
@@ -70,7 +70,7 @@
 	"-C link-dead-code",
 
 	// Sancov breaks with lto
-	// TODO: Remove when https://bugs.llvm.org/show_bug.cgi?id=41734 is resolved and sancov works with LTO
+	// TODO: Remove when https://bugs.llvm.org/show_bug.cgi?id=41734 is resolved and sancov-module works with LTO
 	"-C lto=no",
 }
 
diff --git a/ui/build/config.go b/ui/build/config.go
index 1dd948c..077a4d1 100644
--- a/ui/build/config.go
+++ b/ui/build/config.go
@@ -35,10 +35,10 @@
 )
 
 const (
-	envConfigDir  = "vendor/google/tools/soong_config"
-	jsonSuffix    = "json"
+	envConfigDir = "vendor/google/tools/soong_config"
+	jsonSuffix   = "json"
 
-	configFetcher = "vendor/google/tools/soong/expconfigfetcher"
+	configFetcher         = "vendor/google/tools/soong/expconfigfetcher"
 	envConfigFetchTimeout = 10 * time.Second
 )
 
@@ -62,6 +62,7 @@
 	jsonModuleGraph bool
 	bp2build        bool
 	queryview       bool
+	reportMkMetrics bool // Collect and report mk2bp migration progress metrics.
 	soongDocs       bool
 	skipConfig      bool
 	skipKati        bool
@@ -155,7 +156,7 @@
 	}
 
 	configExists := false
-	outConfigFilePath := filepath.Join(config.OutDir(), envConfigName + jsonSuffix)
+	outConfigFilePath := filepath.Join(config.OutDir(), envConfigName+jsonSuffix)
 	if _, err := os.Stat(outConfigFilePath); err == nil {
 		configExists = true
 	}
@@ -711,6 +712,8 @@
 			c.skipConfig = true
 		} else if arg == "--skip-soong-tests" {
 			c.skipSoongTests = true
+		} else if arg == "--mk-metrics" {
+			c.reportMkMetrics = true
 		} else if len(arg) > 0 && arg[0] == '-' {
 			parseArgNum := func(def int) int {
 				if len(arg) > 2 {
@@ -1381,6 +1384,11 @@
 	return filepath.Join(c.LogsDir(), "bazel_metrics")
 }
 
+// MkFileMetrics returns the file path for make-related metrics.
+func (c *configImpl) MkMetrics() string {
+	return filepath.Join(c.LogsDir(), "mk_metrics.pb")
+}
+
 func (c *configImpl) SetEmptyNinjaFile(v bool) {
 	c.emptyNinjaFile = v
 }
diff --git a/ui/build/finder.go b/ui/build/finder.go
index 68efe21..262de3d 100644
--- a/ui/build/finder.go
+++ b/ui/build/finder.go
@@ -138,6 +138,17 @@
 		ctx.Fatalf("Could not export module list: %v", err)
 	}
 
+	// Gate collecting/reporting mk metrics on builds that specifically request
+	// it, as identifying the total number of mk files adds 4-5ms onto null
+	// builds.
+	if config.reportMkMetrics {
+		androidMksTotal := f.FindNamedAt(".", "Android.mk")
+
+		ctx.Metrics.SetToplevelMakefiles(len(androidMks))
+		ctx.Metrics.SetTotalMakefiles(len(androidMksTotal))
+		ctx.Metrics.DumpMkMetrics(config.MkMetrics())
+	}
+
 	// Stop searching a subdirectory recursively after finding a CleanSpec.mk.
 	cleanSpecs := f.FindFirstNamedAt(".", "CleanSpec.mk")
 	err = dumpListToFile(ctx, config, cleanSpecs, filepath.Join(dumpDir, "CleanSpec.mk.list"))
diff --git a/ui/build/paths/config.go b/ui/build/paths/config.go
index 81c500d..831a80f 100644
--- a/ui/build/paths/config.go
+++ b/ui/build/paths/config.go
@@ -91,6 +91,7 @@
 	"pstree":  Allowed,
 	"rsync":   Allowed,
 	"sh":      Allowed,
+	"stubby":  Allowed,
 	"tr":      Allowed,
 	"unzip":   Allowed,
 	"zip":     Allowed,
diff --git a/ui/build/soong.go b/ui/build/soong.go
index 117a2a5..1b993e1 100644
--- a/ui/build/soong.go
+++ b/ui/build/soong.go
@@ -507,6 +507,9 @@
 	if shouldCollectBuildSoongMetrics(config) && ctx.Metrics != nil {
 		ctx.Metrics.SetSoongBuildMetrics(soongBuildMetrics)
 	}
+	if config.JsonModuleGraph() {
+		distGzipFile(ctx, config, config.ModuleGraphFile(), "soong")
+	}
 }
 
 func runMicrofactory(ctx Context, config Config, name string, pkg string, mapping map[string]string) {
diff --git a/ui/metrics/Android.bp b/ui/metrics/Android.bp
index 3ba3907..05db1d7 100644
--- a/ui/metrics/Android.bp
+++ b/ui/metrics/Android.bp
@@ -21,9 +21,10 @@
     pkgPath: "android/soong/ui/metrics",
     deps: [
         "golang-protobuf-proto",
+        "soong-ui-bp2build_metrics_proto",
         "soong-ui-metrics_upload_proto",
         "soong-ui-metrics_proto",
-        "soong-ui-bp2build_metrics_proto",
+        "soong-ui-mk_metrics_proto",
         "soong-ui-tracer",
         "soong-shared",
     ],
@@ -71,3 +72,15 @@
         "bp2build_metrics_proto/bp2build_metrics.pb.go",
     ],
 }
+
+bootstrap_go_package {
+    name: "soong-ui-mk_metrics_proto",
+    pkgPath: "android/soong/ui/metrics/mk_metrics_proto",
+    deps: [
+        "golang-protobuf-reflect-protoreflect",
+        "golang-protobuf-runtime-protoimpl",
+    ],
+    srcs: [
+        "mk_metrics_proto/mk_metrics.pb.go",
+    ],
+}
diff --git a/ui/metrics/metrics.go b/ui/metrics/metrics.go
index 80f8c1a..6f1ed60 100644
--- a/ui/metrics/metrics.go
+++ b/ui/metrics/metrics.go
@@ -41,6 +41,7 @@
 	"google.golang.org/protobuf/proto"
 
 	soong_metrics_proto "android/soong/ui/metrics/metrics_proto"
+	mk_metrics_proto "android/soong/ui/metrics/mk_metrics_proto"
 )
 
 const (
@@ -62,14 +63,22 @@
 	Total = "total"
 )
 
-// Metrics is a struct that stores collected metrics during the course
-// of a build which later is dumped to a MetricsBase protobuf file.
-// See ui/metrics/metrics_proto/metrics.proto for further details
-// on what information is collected.
+// Metrics is a struct that stores collected metrics during the course of a
+// build. It is later dumped to protobuf files. See underlying metrics protos
+// for further details on what information is collected.
 type Metrics struct {
-	// The protobuf message that is later written to the file.
+	// Protobuf containing various top-level build metrics. These include:
+	// 1. Build identifiers (ex: branch ID, requested product, hostname,
+	//    originating command)
+	// 2. Per-subprocess top-level metrics (ex: ninja process IO and runtime).
+	//    Note that, since these metrics are reported by soong_ui, there is little
+	//    insight that can be provided into performance breakdowns of individual
+	//    subprocesses.
 	metrics soong_metrics_proto.MetricsBase
 
+	// Protobuf containing metrics pertaining to number of makefiles in a build.
+	mkMetrics mk_metrics_proto.MkMetrics
+
 	// A list of pending build events.
 	EventTracer *EventTracer
 }
@@ -78,11 +87,24 @@
 func New() (metrics *Metrics) {
 	m := &Metrics{
 		metrics:     soong_metrics_proto.MetricsBase{},
+		mkMetrics:   mk_metrics_proto.MkMetrics{},
 		EventTracer: &EventTracer{},
 	}
 	return m
 }
 
+func (m *Metrics) SetTotalMakefiles(total int) {
+	m.mkMetrics.TotalMakefiles = uint32(total)
+}
+
+func (m *Metrics) SetToplevelMakefiles(total int) {
+	m.mkMetrics.ToplevelMakefiles = uint32(total)
+}
+
+func (m *Metrics) DumpMkMetrics(outPath string) {
+	shared.Save(&m.mkMetrics, outPath)
+}
+
 // SetTimeMetrics stores performance information from an executed block of
 // code.
 func (m *Metrics) SetTimeMetrics(perf soong_metrics_proto.PerfInfo) {
diff --git a/ui/metrics/mk_metrics_proto/mk_metrics.pb.go b/ui/metrics/mk_metrics_proto/mk_metrics.pb.go
new file mode 100644
index 0000000..32e136a
--- /dev/null
+++ b/ui/metrics/mk_metrics_proto/mk_metrics.pb.go
@@ -0,0 +1,177 @@
+// Copyright 2022 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.
+
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.27.1
+// 	protoc        v3.9.1
+// source: mk_metrics.proto
+
+package mk_metrics_proto
+
+import (
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+// Contains metrics pertaining to makefiles.
+type MkMetrics struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// Total number of mk files present in the workspace.
+	TotalMakefiles uint32 `protobuf:"varint,1,opt,name=totalMakefiles,proto3" json:"totalMakefiles,omitempty"`
+	// Number of top-level mk files present in the workspace.
+	// A mk file is "top level" if there are no mk files in its parent
+	// direrctories.
+	// This value is equivalent to the number of entries in Android.mk.list.
+	ToplevelMakefiles uint32 `protobuf:"varint,2,opt,name=toplevelMakefiles,proto3" json:"toplevelMakefiles,omitempty"`
+}
+
+func (x *MkMetrics) Reset() {
+	*x = MkMetrics{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_mk_metrics_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *MkMetrics) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*MkMetrics) ProtoMessage() {}
+
+func (x *MkMetrics) ProtoReflect() protoreflect.Message {
+	mi := &file_mk_metrics_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use MkMetrics.ProtoReflect.Descriptor instead.
+func (*MkMetrics) Descriptor() ([]byte, []int) {
+	return file_mk_metrics_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *MkMetrics) GetTotalMakefiles() uint32 {
+	if x != nil {
+		return x.TotalMakefiles
+	}
+	return 0
+}
+
+func (x *MkMetrics) GetToplevelMakefiles() uint32 {
+	if x != nil {
+		return x.ToplevelMakefiles
+	}
+	return 0
+}
+
+var File_mk_metrics_proto protoreflect.FileDescriptor
+
+var file_mk_metrics_proto_rawDesc = []byte{
+	0x0a, 0x10, 0x6d, 0x6b, 0x5f, 0x6d, 0x65, 0x74, 0x72, 0x69, 0x63, 0x73, 0x2e, 0x70, 0x72, 0x6f,
+	0x74, 0x6f, 0x12, 0x16, 0x73, 0x6f, 0x6f, 0x6e, 0x67, 0x5f, 0x62, 0x75, 0x69, 0x6c, 0x64, 0x5f,
+	0x6d, 0x6b, 0x5f, 0x6d, 0x65, 0x74, 0x72, 0x69, 0x63, 0x73, 0x22, 0x61, 0x0a, 0x09, 0x4d, 0x6b,
+	0x4d, 0x65, 0x74, 0x72, 0x69, 0x63, 0x73, 0x12, 0x26, 0x0a, 0x0e, 0x74, 0x6f, 0x74, 0x61, 0x6c,
+	0x4d, 0x61, 0x6b, 0x65, 0x66, 0x69, 0x6c, 0x65, 0x73, 0x18, 0x01, 0x20, 0x01, 0x28, 0x0d, 0x52,
+	0x0e, 0x74, 0x6f, 0x74, 0x61, 0x6c, 0x4d, 0x61, 0x6b, 0x65, 0x66, 0x69, 0x6c, 0x65, 0x73, 0x12,
+	0x2c, 0x0a, 0x11, 0x74, 0x6f, 0x70, 0x6c, 0x65, 0x76, 0x65, 0x6c, 0x4d, 0x61, 0x6b, 0x65, 0x66,
+	0x69, 0x6c, 0x65, 0x73, 0x18, 0x02, 0x20, 0x01, 0x28, 0x0d, 0x52, 0x11, 0x74, 0x6f, 0x70, 0x6c,
+	0x65, 0x76, 0x65, 0x6c, 0x4d, 0x61, 0x6b, 0x65, 0x66, 0x69, 0x6c, 0x65, 0x73, 0x42, 0x2b, 0x5a,
+	0x29, 0x61, 0x6e, 0x64, 0x72, 0x6f, 0x69, 0x64, 0x2f, 0x73, 0x6f, 0x6f, 0x6e, 0x67, 0x2f, 0x75,
+	0x69, 0x2f, 0x6d, 0x65, 0x74, 0x72, 0x69, 0x63, 0x73, 0x2f, 0x6d, 0x6b, 0x5f, 0x6d, 0x65, 0x74,
+	0x72, 0x69, 0x63, 0x73, 0x5f, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74,
+	0x6f, 0x33,
+}
+
+var (
+	file_mk_metrics_proto_rawDescOnce sync.Once
+	file_mk_metrics_proto_rawDescData = file_mk_metrics_proto_rawDesc
+)
+
+func file_mk_metrics_proto_rawDescGZIP() []byte {
+	file_mk_metrics_proto_rawDescOnce.Do(func() {
+		file_mk_metrics_proto_rawDescData = protoimpl.X.CompressGZIP(file_mk_metrics_proto_rawDescData)
+	})
+	return file_mk_metrics_proto_rawDescData
+}
+
+var file_mk_metrics_proto_msgTypes = make([]protoimpl.MessageInfo, 1)
+var file_mk_metrics_proto_goTypes = []interface{}{
+	(*MkMetrics)(nil), // 0: soong_build_mk_metrics.MkMetrics
+}
+var file_mk_metrics_proto_depIdxs = []int32{
+	0, // [0:0] is the sub-list for method output_type
+	0, // [0:0] is the sub-list for method input_type
+	0, // [0:0] is the sub-list for extension type_name
+	0, // [0:0] is the sub-list for extension extendee
+	0, // [0:0] is the sub-list for field type_name
+}
+
+func init() { file_mk_metrics_proto_init() }
+func file_mk_metrics_proto_init() {
+	if File_mk_metrics_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_mk_metrics_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*MkMetrics); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_mk_metrics_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   1,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_mk_metrics_proto_goTypes,
+		DependencyIndexes: file_mk_metrics_proto_depIdxs,
+		MessageInfos:      file_mk_metrics_proto_msgTypes,
+	}.Build()
+	File_mk_metrics_proto = out.File
+	file_mk_metrics_proto_rawDesc = nil
+	file_mk_metrics_proto_goTypes = nil
+	file_mk_metrics_proto_depIdxs = nil
+}
diff --git a/ui/metrics/mk_metrics_proto/mk_metrics.proto b/ui/metrics/mk_metrics_proto/mk_metrics.proto
new file mode 100644
index 0000000..df7bca3
--- /dev/null
+++ b/ui/metrics/mk_metrics_proto/mk_metrics.proto
@@ -0,0 +1,30 @@
+// Copyright 2022 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.
+
+syntax = "proto3";
+
+package soong_build_mk_metrics;
+option go_package = "android/soong/ui/metrics/mk_metrics_proto";
+
+// Contains metrics pertaining to makefiles.
+message MkMetrics {
+  // Total number of mk files present in the workspace.
+  uint32 totalMakefiles = 1;
+
+  // Number of top-level mk files present in the workspace.
+  // A mk file is "top level" if there are no mk files in its parent
+  // direrctories.
+  // This value is equivalent to the number of entries in Android.mk.list.
+  uint32 toplevelMakefiles = 2;
+}
diff --git a/ui/metrics/mk_metrics_proto/regen.sh b/ui/metrics/mk_metrics_proto/regen.sh
new file mode 100755
index 0000000..64018d4
--- /dev/null
+++ b/ui/metrics/mk_metrics_proto/regen.sh
@@ -0,0 +1,29 @@
+#!/bin/bash -e
+
+# Copyright 2022 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.
+
+# Generates the golang source file of the mk_metrics.proto protobuf file.
+
+function die() { echo "ERROR: $1" >&2; exit 1; }
+
+readonly error_msg="Maybe you need to run 'lunch aosp_arm-eng && m aprotoc blueprint_tools'?"
+
+if ! hash aprotoc &>/dev/null; then
+  die "could not find aprotoc. ${error_msg}"
+fi
+
+if ! aprotoc --go_out=paths=source_relative:. mk_metrics.proto; then
+  die "build failed. ${error_msg}"
+fi