Zero the cookie after close.

The cookie values can be re-used by the VM, so zero it out after closing
the DexFile to ensure we don't try to close again in the finalizer.

Bug 3238298

Change-Id: I2cc6a0d90ae9fbdff9c6a0f34a8031f36aa78e70

1 files changed, 2 insertions, 1 deletions

diff --git a/dalvik/src/main/java/dalvik/system/DexFile.java b/dalvik/src/main/java/dalvik/system/DexFile.java
index 0740f28..5c311d4 100644
--- a/dalvik/src/main/java/dalvik/system/DexFile.java
+++ b/dalvik/src/main/java/dalvik/system/DexFile.java
@@ -31,7 +31,7 @@ import java.util.Enumeration;
  * read-only by the VM.
  */
 public final class DexFile {
-    private final int mCookie;
+    private int mCookie;
     private final String mFileName;
     private final CloseGuard guard = CloseGuard.get();
 
@@ -169,6 +169,7 @@ public final class DexFile {
     public void close() throws IOException {
         guard.close();
         closeDexFile(mCookie);
+        mCookie = 0;
     }
 
     /**