Use boot image extension in the JIT-zygote experiment.

Test: temporarily enable JIT-zygote configuration, build, boot the
  device and ensure that the JIT-zygote specific boot image
  apex-framework.art is mapped in the zygote address space:

  1. enable Jit zygote in the product device config (in my case
    device/google/muskie/aosp_walleye.mk):

    +# System server should not contain compiled code.
    +PRODUCT_SYSTEM_SERVER_COMPILER_FILTER := verify
    +
    +# Use the apex image for preopting.
    +DEXPREOPT_USE_APEX_IMAGE := true
    +
    +# Have the runtime pick up the apex image.
    +PRODUCT_PROPERTY_OVERRIDES += \
    +    dalvik.vm.boot-image=/apex/com.android.art/javalib/apex.art:/system/framework/apex-framework.art

  2. lunch aosp_walleye-userdebug \
    && m \
    && adb reboot bootloader \
    && fastboot flashall -w

  3. adb shell cat /proc/`adb shell ps | grep zygote64 | awk {'print $2'}`/maps | grep apex-framework.art
  6fe44000-7025c000 rw-p 00000000 fc:02 1179718                            /data/dalvik-cache/arm64/apex@com.android.art@javalib@apex-framework.art
  70571000-70696000 rw-p 0072d000 fc:02 1179718                            /data/dalvik-cache/arm64/apex@com.android.art@javalib@apex-framework.art
  75a339f000-75a33ac000 r--p 00852000 fc:02 1179718                        /data/dalvik-cache/arm64/apex@com.android.art@javalib@apex-framework.art

Change-Id: I5493e575ebf90bad1d5ad2850004d54590bbc079

java/dexpreopt.go

@@ -101,9 +101,8 @@ func (d *dexpreopter) dexpreopt(ctx android.ModuleContext, dexJarFile android.Mo
 
 	global := dexpreoptGlobalConfig(ctx)
 	bootImage := defaultBootImageConfig(ctx)
-	defaultBootImage := bootImage
 	if global.UseApexImage {
-		bootImage = apexBootImageConfig(ctx)
+		bootImage = frameworkJZBootImageConfig(ctx)
 	}
 
 	var archs []android.ArchType
@@ -174,11 +173,8 @@ func (d *dexpreopter) dexpreopt(ctx android.ModuleContext, dexJarFile android.Mo
 		DexPreoptImagesDeps:     imagesDeps,
 		DexPreoptImageLocations: bootImage.imageLocations,
 
-		// We use the dex paths and dex locations of the default boot image, as it
+		PreoptBootClassPathDexFiles:     bootImage.dexPathsDeps.Paths(),
-		// contains the full dexpreopt boot classpath. Other images may just contain a subset of
+		PreoptBootClassPathDexLocations: bootImage.dexLocationsDeps,
-		// the dexpreopt boot classpath.
-		PreoptBootClassPathDexFiles:     defaultBootImage.dexPathsDeps.Paths(),
-		PreoptBootClassPathDexLocations: defaultBootImage.dexLocationsDeps,
 
 		PreoptExtractedApk: false,
 

java/dexpreopt_bootjars.go

@@ -220,7 +220,8 @@ func (d *dexpreoptBootJars) GenerateBuildActions(ctx android.SingletonContext) {
 	d.otherImages = append(d.otherImages, buildBootImage(ctx, artBootImageConfig(ctx)))
 	if global.GenerateApexImage {
 		// Create boot images for the JIT-zygote experiment.
-		d.otherImages = append(d.otherImages, buildBootImage(ctx, apexBootImageConfig(ctx)))
+		d.otherImages = append(d.otherImages, buildBootImage(ctx, artJZBootImageConfig(ctx)))
+		d.otherImages = append(d.otherImages, buildBootImage(ctx, frameworkJZBootImageConfig(ctx)))
 	}
 
 	dumpOatRules(ctx, d.defaultBootImage)

java/dexpreopt_config.go

@@ -124,7 +124,8 @@ var (
 	bootImageConfigKey       = android.NewOnceKey("bootImageConfig")
 	artBootImageName         = "art"
 	frameworkBootImageName   = "boot"
-	apexBootImageName      = "apex"
+	artJZBootImageName       = "jitzygote-art"
+	frameworkJZBootImageName = "jitzygote-boot"
 )
 
 // Construct the global boot image configs.
@@ -178,22 +179,33 @@ func genBootImageConfigs(ctx android.PathContext) map[string]*bootImageConfig {
 			dexLocationsDeps: append(artLocations, frameworkLocations...),
 		}
 
-		// Apex config for the  boot image used in the JIT-zygote experiment.
+		// ART config for JIT-zygote boot image.
-		// It includes both the Core libraries and framework.
+		artJZCfg := bootImageConfig{
-		apexCfg := bootImageConfig{
 			extension:        false,
-			name:             apexBootImageName,
+			name:             artJZBootImageName,
+			stem:             "apex",
+			installSubdir:    artSubdir,
+			modules:          artModules,
+			dexLocations:     artLocations,
+			dexLocationsDeps: artLocations,
+		}
+
+		// Framework config for JIT-zygote boot image extension.
+		frameworkJZCfg := bootImageConfig{
+			extension:        true,
+			name:             frameworkJZBootImageName,
 			stem:             "apex",
 			installSubdir:    frameworkSubdir,
-			modules:          concat(artModules, frameworkModules),
+			modules:          frameworkModules,
-			dexLocations:     concat(artLocations, frameworkLocations),
+			dexLocations:     frameworkLocations,
-			dexLocationsDeps: concat(artLocations, frameworkLocations),
+			dexLocationsDeps: append(artLocations, frameworkLocations...),
 		}
 
 		configs := map[string]*bootImageConfig{
 			artBootImageName:         &artCfg,
 			frameworkBootImageName:   &frameworkCfg,
-			apexBootImageName:      &apexCfg,
+			artJZBootImageName:       &artJZCfg,
+			frameworkJZBootImageName: &frameworkJZCfg,
 		}
 
 		// common to all configs
@@ -235,6 +247,10 @@ func genBootImageConfigs(ctx android.PathContext) map[string]*bootImageConfig {
 		frameworkCfg.dexPathsDeps = append(artCfg.dexPathsDeps, frameworkCfg.dexPathsDeps...)
 		frameworkCfg.imageLocations = append(artCfg.imageLocations, frameworkCfg.imageLocations...)
 
+		// specific to the jitzygote-framework config
+		frameworkJZCfg.dexPathsDeps = append(artJZCfg.dexPathsDeps, frameworkJZCfg.dexPathsDeps...)
+		frameworkJZCfg.imageLocations = append(artJZCfg.imageLocations, frameworkJZCfg.imageLocations...)
+
 		return configs
 	}).(map[string]*bootImageConfig)
 }
@@ -247,8 +263,12 @@ func defaultBootImageConfig(ctx android.PathContext) bootImageConfig {
 	return *genBootImageConfigs(ctx)[frameworkBootImageName]
 }
 
-func apexBootImageConfig(ctx android.PathContext) bootImageConfig {
+func artJZBootImageConfig(ctx android.PathContext) bootImageConfig {
-	return *genBootImageConfigs(ctx)[apexBootImageName]
+	return *genBootImageConfigs(ctx)[artJZBootImageName]
+}
+
+func frameworkJZBootImageConfig(ctx android.PathContext) bootImageConfig {
+	return *genBootImageConfigs(ctx)[frameworkJZBootImageName]
 }
 
 func defaultBootclasspath(ctx android.PathContext) []string {