Fix data race in snapshot singletons when running parallel tests

Singleton objects need to be created in the singleton factory rather
than as a global variable so that they have a unique object per
context in order to allow multiple tests to run in parallel.

Test: go test -race ./...
Change-Id: Ib6912849e1b849ffe8646882cfb476ddea6c6b55

2 files changed, 21 insertions, 27 deletions

diff --git a/snapshot/recovery_snapshot.go b/snapshot/recovery_snapshot.go
index 8ff59cbcf..ab114b411 100644
--- a/snapshot/recovery_snapshot.go
+++ b/snapshot/recovery_snapshot.go
@@ -22,16 +22,14 @@ type RecoverySnapshotModuleInterface interface {
 	ExcludeFromRecoverySnapshot() bool
 }
 
-var recoverySnapshotSingleton = SnapshotSingleton{
-	"recovery",                     // name
-	"SOONG_RECOVERY_SNAPSHOT_ZIP",  // makeVar
-	android.OptionalPath{},         // snapshotZipFile
-	RecoverySnapshotImageSingleton, // Image
-	false,                          // Fake
-}
-
 func RecoverySnapshotSingleton() android.Singleton {
-	return &recoverySnapshotSingleton
+	return &SnapshotSingleton{
+		"recovery",                     // name
+		"SOONG_RECOVERY_SNAPSHOT_ZIP",  // makeVar
+		android.OptionalPath{},         // snapshotZipFile
+		RecoverySnapshotImageSingleton, // Image
+		false,                          // Fake
+	}
 }
 
 // Determine if a dir under source tree is an SoC-owned proprietary directory based
diff --git a/snapshot/vendor_snapshot.go b/snapshot/vendor_snapshot.go
index 4484c855d..3e5f54669 100644
--- a/snapshot/vendor_snapshot.go
+++ b/snapshot/vendor_snapshot.go
@@ -22,28 +22,24 @@ type VendorSnapshotModuleInterface interface {
 	ExcludeFromVendorSnapshot() bool
 }
 
-var vendorSnapshotSingleton = SnapshotSingleton{
-	"vendor",                     // name
-	"SOONG_VENDOR_SNAPSHOT_ZIP",  // makeVar
-	android.OptionalPath{},       // snapshotZipFile
-	VendorSnapshotImageSingleton, // Image
-	false,                        // Fake
-}
-
-var vendorFakeSnapshotSingleton = SnapshotSingleton{
-	"vendor",                         // name
-	"SOONG_VENDOR_FAKE_SNAPSHOT_ZIP", // makeVar
-	android.OptionalPath{},           // snapshotZipFile
-	VendorSnapshotImageSingleton,     // Image
-	true,                             // Fake
-}
-
 func VendorSnapshotSingleton() android.Singleton {
-	return &vendorSnapshotSingleton
+	return &SnapshotSingleton{
+		"vendor",                     // name
+		"SOONG_VENDOR_SNAPSHOT_ZIP",  // makeVar
+		android.OptionalPath{},       // snapshotZipFile
+		VendorSnapshotImageSingleton, // Image
+		false,                        // Fake
+	}
 }
 
 func VendorFakeSnapshotSingleton() android.Singleton {
-	return &vendorFakeSnapshotSingleton
+	return &SnapshotSingleton{
+		"vendor",                         // name
+		"SOONG_VENDOR_FAKE_SNAPSHOT_ZIP", // makeVar
+		android.OptionalPath{},           // snapshotZipFile
+		VendorSnapshotImageSingleton,     // Image
+		true,                             // Fake
+	}
 }
 
 // Determine if a dir under source tree is an SoC-owned proprietary directory based