diff --git a/cc/ndk_abi.go b/cc/ndk_abi.go
index 927fa2e..3456c32 100644
--- a/cc/ndk_abi.go
+++ b/cc/ndk_abi.go
@@ -46,7 +46,7 @@
 
 		if m, ok := module.(*Module); ok {
 			if installer, ok := m.installer.(*stubDecorator); ok {
-				if canDumpAbi() {
+				if canDumpAbi(ctx.Config()) {
 					depPaths = append(depPaths, installer.abiDumpPath)
 				}
 			}
diff --git a/cc/ndk_library.go b/cc/ndk_library.go
index fc682ff..5ef41ea 100644
--- a/cc/ndk_library.go
+++ b/cc/ndk_library.go
@@ -53,9 +53,9 @@
 
 	abitidy = pctx.AndroidStaticRule("abitidy",
 		blueprint.RuleParams{
-			Command:     "$abitidy --all -i $in -o $out",
+			Command:     "$abitidy --all $flags -i $in -o $out",
 			CommandDeps: []string{"$abitidy"},
-		})
+		}, "flags")
 
 	abidiff = pctx.AndroidStaticRule("abidiff",
 		blueprint.RuleParams{
@@ -104,6 +104,12 @@
 	// used. This is only needed to work around platform bugs like
 	// https://github.com/android-ndk/ndk/issues/265.
 	Unversioned_until *string
+
+	// If true, does not emit errors when APIs lacking type information are
+	// found. This is false by default and should not be enabled outside bionic,
+	// where it is enabled pending a fix for http://b/190554910 (no debug info
+	// for asm implemented symbols).
+	Allow_untyped_symbols *bool
 }
 
 type stubDecorator struct {
@@ -315,8 +321,18 @@
 }
 
 // Feature flag.
-func canDumpAbi() bool {
-	return runtime.GOOS != "darwin"
+func canDumpAbi(config android.Config) bool {
+	if runtime.GOOS == "darwin" {
+		return false
+	}
+	// abidw doesn't currently handle top-byte-ignore correctly. Disable ABI
+	// dumping for those configs while we wait for a fix. We'll still have ABI
+	// checking coverage from non-hwasan builds.
+	// http://b/190554910
+	if android.InList("hwaddress", config.SanitizeDevice()) {
+		return false
+	}
+	return true
 }
 
 // Feature flag to disable diffing against prebuilts.
@@ -339,14 +355,22 @@
 			"symbolList": symbolList.String(),
 		},
 	})
+
 	this.abiDumpPath = getNdkAbiDumpInstallBase(ctx).Join(ctx,
 		this.apiLevel.String(), ctx.Arch().ArchType.String(),
 		this.libraryName(ctx), "abi.xml")
+	untypedFlag := "--abort-on-untyped-symbols"
+	if proptools.BoolDefault(this.properties.Allow_untyped_symbols, false) {
+		untypedFlag = ""
+	}
 	ctx.Build(pctx, android.BuildParams{
 		Rule:        abitidy,
 		Description: fmt.Sprintf("abitidy %s", implementationLibrary),
 		Input:       abiRawPath,
 		Output:      this.abiDumpPath,
+		Args: map[string]string{
+			"flags": untypedFlag,
+		},
 	})
 }
 
@@ -444,7 +468,7 @@
 	nativeAbiResult := parseNativeAbiDefinition(ctx, symbolFile, c.apiLevel, "")
 	objs := compileStubLibrary(ctx, flags, nativeAbiResult.stubSrc)
 	c.versionScriptPath = nativeAbiResult.versionScript
-	if canDumpAbi() {
+	if canDumpAbi(ctx.Config()) {
 		c.dumpAbi(ctx, nativeAbiResult.symbolList)
 		if canDiffAbi() {
 			c.diffAbi(ctx)