Rename fields in dexpreopt config

Add 'host' into the name of fields regarding path on the host side to
distinguish between paths on the device(which will be added in the
following commit), and paths on the host.

Bug: 158843648
Test: build and flash, and then
  adb wait-for-device \
    && adb -s $S root \
    && adb -s $S logcat \
    | grep -E 'ClassLoaderContext [a-z ]+ mismatch' -C 1
Change-Id: Ib2645ed51591ba2f4b726c115b401ad2bd6675da
diff --git a/java/dexpreopt.go b/java/dexpreopt.go
index 0020a2d..ef3ca2c 100644
--- a/java/dexpreopt.go
+++ b/java/dexpreopt.go
@@ -180,11 +180,11 @@
 	for _, target := range targets {
 		archs = append(archs, target.Arch.ArchType)
 		variant := bootImage.getVariant(target)
-		images = append(images, variant.images)
+		images = append(images, variant.imagePathOnHost)
 		imagesDeps = append(imagesDeps, variant.imagesDeps)
 	}
 	// The image locations for all Android variants are identical.
-	imageLocations := bootImage.getAnyAndroidVariant().imageLocations()
+	hostImageLocations := bootImage.getAnyAndroidVariant().imageLocations()
 
 	var profileClassListing android.OptionalPath
 	var profileBootListing android.OptionalPath
@@ -224,9 +224,9 @@
 		ProvidesUsesLibrary:            providesUsesLib,
 		ClassLoaderContexts:            d.classLoaderContexts,
 
-		Archs:                   archs,
-		DexPreoptImagesDeps:     imagesDeps,
-		DexPreoptImageLocations: imageLocations,
+		Archs:                         archs,
+		DexPreoptImagesDeps:           imagesDeps,
+		DexPreoptImageLocationsOnHost: hostImageLocations,
 
 		PreoptBootClassPathDexFiles:     dexFiles.Paths(),
 		PreoptBootClassPathDexLocations: dexLocations,
diff --git a/java/dexpreopt_bootjars.go b/java/dexpreopt_bootjars.go
index f85e1c9..19d1075 100644
--- a/java/dexpreopt_bootjars.go
+++ b/java/dexpreopt_bootjars.go
@@ -242,7 +242,7 @@
 	symbolsDir android.OutputPath
 
 	// Subdirectory where the image files are installed.
-	installSubdir string
+	installDirOnHost string
 
 	// A list of (location, jar) pairs for the Java modules in this image.
 	modules android.ConfiguredJarList
@@ -273,8 +273,8 @@
 	dexLocationsDeps []string // for the dependency images and in this image
 
 	// Paths to image files.
-	images     android.OutputPath  // first image file
-	imagesDeps android.OutputPaths // all files
+	imagePathOnHost android.OutputPath  // first image file
+	imagesDeps      android.OutputPaths // all files
 
 	// Only for extensions, paths to the primary boot images.
 	primaryImages android.OutputPath
@@ -365,7 +365,7 @@
 	if image.extends != nil {
 		imageLocations = image.extends.getVariant(image.target).imageLocations()
 	}
-	return append(imageLocations, dexpreopt.PathToLocation(image.images, image.target.Arch.ArchType))
+	return append(imageLocations, dexpreopt.PathToLocation(image.imagePathOnHost, image.target.Arch.ArchType))
 }
 
 func dexpreoptBootJarsFactory() android.SingletonModule {
@@ -656,9 +656,9 @@
 
 	arch := image.target.Arch.ArchType
 	os := image.target.Os.String() // We need to distinguish host-x86 and device-x86.
-	symbolsDir := image.symbolsDir.Join(ctx, os, image.installSubdir, arch.String())
+	symbolsDir := image.symbolsDir.Join(ctx, os, image.installDirOnHost, arch.String())
 	symbolsFile := symbolsDir.Join(ctx, image.stem+".oat")
-	outputDir := image.dir.Join(ctx, os, image.installSubdir, arch.String())
+	outputDir := image.dir.Join(ctx, os, image.installDirOnHost, arch.String())
 	outputPath := outputDir.Join(ctx, image.stem+".oat")
 	oatLocation := dexpreopt.PathToLocation(outputPath, arch)
 	imagePath := outputPath.ReplaceExtension(ctx, "art")
@@ -753,7 +753,7 @@
 
 	cmd.Textf(`|| ( echo %s ; false )`, proptools.ShellEscape(failureMessage))
 
-	installDir := filepath.Join("/", image.installSubdir, arch.String())
+	installDir := filepath.Join("/", image.installDirOnHost, arch.String())
 
 	var vdexInstalls android.RuleBuilderInstalls
 	var unstrippedInstalls android.RuleBuilderInstalls
@@ -1036,7 +1036,7 @@
 				}
 				sfx := variant.name + suffix + "_" + variant.target.Arch.ArchType.String()
 				ctx.Strict("DEXPREOPT_IMAGE_VDEX_BUILT_INSTALLED_"+sfx, variant.vdexInstalls.String())
-				ctx.Strict("DEXPREOPT_IMAGE_"+sfx, variant.images.String())
+				ctx.Strict("DEXPREOPT_IMAGE_"+sfx, variant.imagePathOnHost.String())
 				ctx.Strict("DEXPREOPT_IMAGE_DEPS_"+sfx, strings.Join(variant.imagesDeps.Strings(), " "))
 				ctx.Strict("DEXPREOPT_IMAGE_BUILT_INSTALLED_"+sfx, variant.installs.String())
 				ctx.Strict("DEXPREOPT_IMAGE_UNSTRIPPED_BUILT_INSTALLED_"+sfx, variant.unstrippedInstalls.String())
diff --git a/java/dexpreopt_config.go b/java/dexpreopt_config.go
index 0ab6502..9eb3f49 100644
--- a/java/dexpreopt_config.go
+++ b/java/dexpreopt_config.go
@@ -84,26 +84,26 @@
 		artModules := global.ArtApexJars
 		frameworkModules := global.BootJars.RemoveList(artModules)
 
-		artSubdir := "apex/art_boot_images/javalib"
+		artDirOnHost := "apex/art_boot_images/javalib"
 		frameworkSubdir := "system/framework"
 
 		// ART config for the primary boot image in the ART apex.
 		// It includes the Core Libraries.
 		artCfg := bootImageConfig{
-			name:          artBootImageName,
-			stem:          "boot",
-			installSubdir: artSubdir,
-			modules:       artModules,
+			name:             artBootImageName,
+			stem:             "boot",
+			installDirOnHost: artDirOnHost,
+			modules:          artModules,
 		}
 
 		// Framework config for the boot image extension.
 		// It includes framework libraries and depends on the ART config.
 		frameworkCfg := bootImageConfig{
-			extends:       &artCfg,
-			name:          frameworkBootImageName,
-			stem:          "boot",
-			installSubdir: frameworkSubdir,
-			modules:       frameworkModules,
+			extends:          &artCfg,
+			name:             frameworkBootImageName,
+			stem:             "boot",
+			installDirOnHost: frameworkSubdir,
+			modules:          frameworkModules,
 		}
 
 		configs := map[string]*bootImageConfig{
@@ -130,11 +130,11 @@
 			// Create target-specific variants.
 			for _, target := range targets {
 				arch := target.Arch.ArchType
-				imageDir := c.dir.Join(ctx, target.Os.String(), c.installSubdir, arch.String())
+				imageDir := c.dir.Join(ctx, target.Os.String(), c.installDirOnHost, arch.String())
 				variant := &bootImageVariant{
 					bootImageConfig: c,
 					target:          target,
-					images:          imageDir.Join(ctx, imageName),
+					imagePathOnHost: imageDir.Join(ctx, imageName),
 					imagesDeps:      c.moduleFiles(ctx, imageDir, ".art", ".oat", ".vdex"),
 					dexLocations:    c.modules.DevicePaths(ctx.Config(), target.Os),
 				}
@@ -148,7 +148,7 @@
 		// specific to the framework config
 		frameworkCfg.dexPathsDeps = append(artCfg.dexPathsDeps, frameworkCfg.dexPathsDeps...)
 		for i := range targets {
-			frameworkCfg.variants[i].primaryImages = artCfg.variants[i].images
+			frameworkCfg.variants[i].primaryImages = artCfg.variants[i].imagePathOnHost
 			frameworkCfg.variants[i].dexLocationsDeps = append(artCfg.variants[i].dexLocations, frameworkCfg.variants[i].dexLocationsDeps...)
 		}