4 files changed, 115 insertions, 0 deletions
diff --git a/java/Android.bp b/java/Android.bp
index b6c14ac37..8334b85ec 100644
--- a/java/Android.bp
+++ b/java/Android.bp
@@ -50,6 +50,7 @@ bootstrap_go_package {
         "kotlin.go",
         "lint.go",
         "legacy_core_platform_api_usage.go",
+        "platform_bootclasspath.go",
         "platform_compat_config.go",
         "plugin.go",
         "prebuilt_apis.go",
@@ -79,6 +80,7 @@ bootstrap_go_package {
         "java_test.go",
         "jdeps_test.go",
         "kotlin_test.go",
+        "platform_bootclasspath_test.go",
         "platform_compat_config_test.go",
         "plugin_test.go",
         "rro_test.go",
diff --git a/java/platform_bootclasspath.go b/java/platform_bootclasspath.go
new file mode 100644
index 000000000..550707754
--- /dev/null
+++ b/java/platform_bootclasspath.go
@@ -0,0 +1,74 @@
+// Copyright 2021 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 (
+	"android/soong/android"
+	"android/soong/dexpreopt"
+)
+
+func init() {
+	registerPlatformBootclasspathBuildComponents(android.InitRegistrationContext)
+}
+
+func registerPlatformBootclasspathBuildComponents(ctx android.RegistrationContext) {
+	ctx.RegisterModuleType("platform_bootclasspath", platformBootclasspathFactory)
+}
+
+type platformBootclasspathModule struct {
+	android.ModuleBase
+}
+
+func platformBootclasspathFactory() android.Module {
+	m := &platformBootclasspathModule{}
+	android.InitAndroidArchModule(m, android.DeviceSupported, android.MultilibCommon)
+	return m
+}
+
+func (b *platformBootclasspathModule) DepsMutator(ctx android.BottomUpMutatorContext) {
+	if SkipDexpreoptBootJars(ctx) {
+		return
+	}
+
+	// Add a dependency onto the dex2oat tool which is needed for creating the boot image. The
+	// path is retrieved from the dependency by GetGlobalSoongConfig(ctx).
+	dexpreopt.RegisterToolDeps(ctx)
+}
+
+func (b *platformBootclasspathModule) GenerateAndroidBuildActions(ctx android.ModuleContext) {
+	// Nothing to do if skipping the dexpreopt of boot image jars.
+	if SkipDexpreoptBootJars(ctx) {
+		return
+	}
+
+	// Force the GlobalSoongConfig to be created and cached for use by the dex_bootjars
+	// GenerateSingletonBuildActions method as it cannot create it for itself.
+	dexpreopt.GetGlobalSoongConfig(ctx)
+
+	imageConfig := b.getImageConfig(ctx)
+	if imageConfig == nil {
+		return
+	}
+
+	// Construct the boot image info from the config.
+	info := BootImageInfo{imageConfig: imageConfig}
+
+	// Make it available for other modules.
+	ctx.SetProvider(BootImageInfoProvider, info)
+}
+
+func (b *platformBootclasspathModule) getImageConfig(ctx android.EarlyModuleContext) *bootImageConfig {
+	return defaultBootImageConfig(ctx)
+}
diff --git a/java/platform_bootclasspath_test.go b/java/platform_bootclasspath_test.go
new file mode 100644
index 000000000..1c81cfdc2
--- /dev/null
+++ b/java/platform_bootclasspath_test.go
@@ -0,0 +1,38 @@
+// Copyright (C) 2021 The Android Open Source Project
+//
+// 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 (
+	"testing"
+
+	"android/soong/android"
+	"android/soong/dexpreopt"
+)
+
+// Contains some simple tests for platform_bootclasspath.
+
+var prepareForTestWithPlatformBootclasspath = android.GroupFixturePreparers(
+	PrepareForTestWithJavaDefaultModules,
+	dexpreopt.PrepareForTestByEnablingDexpreopt,
+)
+
+func TestPlatformBootclasspath(t *testing.T) {
+	prepareForTestWithPlatformBootclasspath.
+		RunTestWithBp(t, `
+			platform_bootclasspath {
+				name: "platform-bootclasspath",
+			}
+		`)
+}
diff --git a/java/testing.go b/java/testing.go
index 1113af72c..80c107d12 100644
--- a/java/testing.go
+++ b/java/testing.go
@@ -194,6 +194,7 @@ func registerRequiredBuildComponentsForTest(ctx android.RegistrationContext) {
 	RegisterDocsBuildComponents(ctx)
 	RegisterGenRuleBuildComponents(ctx)
 	registerJavaBuildComponents(ctx)
+	registerPlatformBootclasspathBuildComponents(ctx)
 	RegisterPrebuiltApisBuildComponents(ctx)
 	RegisterRuntimeResourceOverlayBuildComponents(ctx)
 	RegisterSdkLibraryBuildComponents(ctx)