Avoid conflicting shared libraries from SDK snapshots.

Test: m nothing
Test: env SANITIZE_HOST=address \
  SANITIZE_TARGET='hwaddress fuzzer' \
  build/soong/soong_ui.bash --make-mode \
  TARGET_PRODUCT=blueline_hwasan haiku dist
Bug: 170041398
Change-Id: Ifa4f72d6778cbb10663a780c7eb54b5e21d5b571

cc/fuzz.go

@@ -167,7 +167,9 @@ func collectAllSharedDependencies(ctx android.SingletonContext, module android.M
 // that should be installed in the fuzz target output directories. This function
 // returns true, unless:
 //  - The module is not a shared library, or
-//  - The module is a header, stub, or vendor-linked library.
+//  - The module is a header, stub, or vendor-linked library, or
+//  - The module is a prebuilt and its source is available, or
+//  - The module is a versioned member of an SDK snapshot.
 func isValidSharedDependency(dependency android.Module) bool {
 	// TODO(b/144090547): We should be parsing these modules using
 	// ModuleDependencyTag instead of the current brute-force checking.
@@ -190,6 +192,20 @@ func isValidSharedDependency(dependency android.Module) bool {
 		}
 	}
 
+	// If the same library is present both as source and a prebuilt we must pick
+	// only one to avoid a conflict. Always prefer the source since the prebuilt
+	// probably won't be built with sanitizers enabled.
+	if prebuilt, ok := dependency.(android.PrebuiltInterface); ok &&
+		prebuilt.Prebuilt() != nil && prebuilt.Prebuilt().SourceExists() {
+		return false
+	}
+
+	// Discard versioned members of SDK snapshots, because they will conflict with
+	// unversioned ones.
+	if sdkMember, ok := dependency.(android.SdkAware); ok && !sdkMember.ContainingSdk().Unversioned() {
+		return false
+	}
+
 	return true
 }