diff --git a/cc/compiler.go b/cc/compiler.go
index fbe10b5..0aee0bd 100644
--- a/cc/compiler.go
+++ b/cc/compiler.go
@@ -250,8 +250,8 @@
 	return false
 }
 
-func addToModuleList(ctx ModuleContext, list string, module string) {
-	getNamedMapForConfig(ctx.Config(), list).Store(module, true)
+func addToModuleList(ctx ModuleContext, key android.OnceKey, module string) {
+	getNamedMapForConfig(ctx.Config(), key).Store(module, true)
 }
 
 // Create a Flags struct that collects the compile flags from global values,
@@ -503,10 +503,10 @@
 	if len(compiler.Properties.Srcs) > 0 {
 		module := ctx.ModuleDir() + "/Android.bp:" + ctx.ModuleName()
 		if inList("-Wno-error", flags.CFlags) || inList("-Wno-error", flags.CppFlags) {
-			addToModuleList(ctx, modulesUsingWnoError, module)
+			addToModuleList(ctx, modulesUsingWnoErrorKey, module)
 		} else if !inList("-Werror", flags.CFlags) && !inList("-Werror", flags.CppFlags) {
 			if warningsAreAllowed(ctx.ModuleDir()) {
-				addToModuleList(ctx, modulesAddedWall, module)
+				addToModuleList(ctx, modulesAddedWallKey, module)
 				flags.CFlags = append([]string{"-Wall"}, flags.CFlags...)
 			} else {
 				flags.CFlags = append([]string{"-Wall", "-Werror"}, flags.CFlags...)
diff --git a/cc/library.go b/cc/library.go
index d716ffa..b4b89d2 100644
--- a/cc/library.go
+++ b/cc/library.go
@@ -968,8 +968,10 @@
 	return library.MutatedProperties.StubsVersion
 }
 
+var versioningMacroNamesListKey = android.NewOnceKey("versioningMacroNamesList")
+
 func versioningMacroNamesList(config android.Config) *map[string]string {
-	return config.Once("versioningMacroNamesList", func() interface{} {
+	return config.Once(versioningMacroNamesListKey, func() interface{} {
 		m := make(map[string]string)
 		return &m
 	}).(*map[string]string)
@@ -1059,9 +1061,11 @@
 	}
 }
 
+var stubVersionsKey = android.NewOnceKey("stubVersions")
+
 // maps a module name to the list of stubs versions available for the module
 func stubsVersionsFor(config android.Config) map[string][]string {
-	return config.Once("stubVersions", func() interface{} {
+	return config.Once(stubVersionsKey, func() interface{} {
 		return make(map[string][]string)
 	}).(map[string][]string)
 }
diff --git a/cc/makevars.go b/cc/makevars.go
index fb567ba..d91735f 100644
--- a/cc/makevars.go
+++ b/cc/makevars.go
@@ -24,24 +24,24 @@
 	"android/soong/cc/config"
 )
 
-const (
-	modulesAddedWall          = "ModulesAddedWall"
-	modulesUsingWnoError      = "ModulesUsingWnoError"
-	modulesMissingProfileFile = "ModulesMissingProfileFile"
+var (
+	modulesAddedWallKey          = android.NewOnceKey("ModulesAddedWall")
+	modulesUsingWnoErrorKey      = android.NewOnceKey("ModulesUsingWnoError")
+	modulesMissingProfileFileKey = android.NewOnceKey("ModulesMissingProfileFile")
 )
 
 func init() {
 	android.RegisterMakeVarsProvider(pctx, makeVarsProvider)
 }
 
-func getNamedMapForConfig(config android.Config, name string) *sync.Map {
-	return config.Once(name, func() interface{} {
+func getNamedMapForConfig(config android.Config, key android.OnceKey) *sync.Map {
+	return config.Once(key, func() interface{} {
 		return &sync.Map{}
 	}).(*sync.Map)
 }
 
-func makeStringOfKeys(ctx android.MakeVarsContext, setName string) string {
-	set := getNamedMapForConfig(ctx.Config(), setName)
+func makeStringOfKeys(ctx android.MakeVarsContext, key android.OnceKey) string {
+	set := getNamedMapForConfig(ctx.Config(), key)
 	keys := []string{}
 	set.Range(func(key interface{}, value interface{}) bool {
 		keys = append(keys, key.(string))
@@ -117,9 +117,9 @@
 	ctx.Strict("LSDUMP_PATHS", strings.Join(lsdumpPaths, " "))
 
 	ctx.Strict("ANDROID_WARNING_ALLOWED_PROJECTS", makeStringOfWarningAllowedProjects())
-	ctx.Strict("SOONG_MODULES_ADDED_WALL", makeStringOfKeys(ctx, modulesAddedWall))
-	ctx.Strict("SOONG_MODULES_USING_WNO_ERROR", makeStringOfKeys(ctx, modulesUsingWnoError))
-	ctx.Strict("SOONG_MODULES_MISSING_PGO_PROFILE_FILE", makeStringOfKeys(ctx, modulesMissingProfileFile))
+	ctx.Strict("SOONG_MODULES_ADDED_WALL", makeStringOfKeys(ctx, modulesAddedWallKey))
+	ctx.Strict("SOONG_MODULES_USING_WNO_ERROR", makeStringOfKeys(ctx, modulesUsingWnoErrorKey))
+	ctx.Strict("SOONG_MODULES_MISSING_PGO_PROFILE_FILE", makeStringOfKeys(ctx, modulesMissingProfileFileKey))
 
 	ctx.Strict("ADDRESS_SANITIZER_CONFIG_EXTRA_CFLAGS", strings.Join(asanCflags, " "))
 	ctx.Strict("ADDRESS_SANITIZER_CONFIG_EXTRA_LDFLAGS", strings.Join(asanLdflags, " "))
diff --git a/cc/pgo.go b/cc/pgo.go
index a341ab9..9363916 100644
--- a/cc/pgo.go
+++ b/cc/pgo.go
@@ -36,7 +36,8 @@
 	}
 )
 
-const pgoProfileProjectsConfigKey = "PgoProfileProjects"
+var pgoProfileProjectsConfigKey = android.NewOnceKey("PgoProfileProjects")
+
 const profileInstrumentFlag = "-fprofile-generate=/data/local/tmp"
 const profileSamplingFlag = "-gline-tables-only"
 const profileUseInstrumentFormat = "-fprofile-use=%s"
@@ -49,7 +50,7 @@
 }
 
 func recordMissingProfileFile(ctx BaseModuleContext, missing string) {
-	getNamedMapForConfig(ctx.Config(), modulesMissingProfileFile).Store(missing, true)
+	getNamedMapForConfig(ctx.Config(), modulesMissingProfileFileKey).Store(missing, true)
 }
 
 type PgoProperties struct {
diff --git a/cc/sanitize.go b/cc/sanitize.go
index bcc4de3..fc2ed50 100644
--- a/cc/sanitize.go
+++ b/cc/sanitize.go
@@ -958,20 +958,26 @@
 	}
 }
 
+var cfiStaticLibsKey = android.NewOnceKey("cfiStaticLibs")
+
 func cfiStaticLibs(config android.Config) *[]string {
-	return config.Once("cfiStaticLibs", func() interface{} {
+	return config.Once(cfiStaticLibsKey, func() interface{} {
 		return &[]string{}
 	}).(*[]string)
 }
 
+var hwasanStaticLibsKey = android.NewOnceKey("hwasanStaticLibs")
+
 func hwasanStaticLibs(config android.Config) *[]string {
-	return config.Once("hwasanStaticLibs", func() interface{} {
+	return config.Once(hwasanStaticLibsKey, func() interface{} {
 		return &[]string{}
 	}).(*[]string)
 }
 
+var hwasanVendorStaticLibsKey = android.NewOnceKey("hwasanVendorStaticLibs")
+
 func hwasanVendorStaticLibs(config android.Config) *[]string {
-	return config.Once("hwasanVendorStaticLibs", func() interface{} {
+	return config.Once(hwasanVendorStaticLibsKey, func() interface{} {
 		return &[]string{}
 	}).(*[]string)
 }