From 8df5bd08c2ec7e492dc442bc57157a56f65572aa Mon Sep 17 00:00:00 2001
From: Narayan Kamath <narayan@google.com>
Date: Tue, 17 Jun 2014 12:59:46 +0100
Subject: [PATCH] Explicitly list out the list of cache subdirs to prune.

We don't want directories like profiles and the former
profile-cache from being included in the prune. SELinux would
have prevented the move, but that's very brittle.

bug: 15677279

Change-Id: I2ff5db056757ffacaf108bb07b02dc0cac7172dd
---
 services/java/com/android/server/pm/Installer.java  |  5 +++--
 .../android/server/pm/PackageManagerService.java    | 13 +++++++++----
 2 files changed, 12 insertions(+), 6 deletions(-)

diff --git a/services/java/com/android/server/pm/Installer.java b/services/java/com/android/server/pm/Installer.java
index adf74396f8509..7981a5b0bb1bd 100644
--- a/services/java/com/android/server/pm/Installer.java
+++ b/services/java/com/android/server/pm/Installer.java
@@ -24,6 +24,7 @@ import android.util.Slog;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
+import java.util.List;
 
 public final class Installer {
     private static final String TAG = "Installer";
@@ -335,8 +336,8 @@ public final class Installer {
         }
     }
 
-    public int pruneDexCache() {
-        return execute("prunedexcache");
+    public int pruneDexCache(String cacheSubDir) {
+        return execute("prunedexcache " + cacheSubDir);
     }
 
     public int freeCache(long freeStorageSize) {
diff --git a/services/java/com/android/server/pm/PackageManagerService.java b/services/java/com/android/server/pm/PackageManagerService.java
index 2dad8abb22403..1687cd2b9c941 100755
--- a/services/java/com/android/server/pm/PackageManagerService.java
+++ b/services/java/com/android/server/pm/PackageManagerService.java
@@ -1437,9 +1437,6 @@ public class PackageManagerService extends IPackageManager.Stub {
                 // changed. Consider this significant, and wipe away all other
                 // existing dexopt files to ensure we don't leave any dangling around.
                 //
-                // Additionally, delete all dex files from the root directory
-                // since there shouldn't be any there anyway.
-                //
                 // TODO: This should be revisited because it isn't as good an indicator
                 // as it used to be. It used to include the boot classpath but at some point
                 // DexFile.isDexOptNeeded started returning false for the boot
@@ -1447,7 +1444,15 @@ public class PackageManagerService extends IPackageManager.Stub {
                 // small maintenance release update that the library and tool
                 // jars may be unchanged but APK could be removed resulting in
                 // unused dalvik-cache files.
-                mInstaller.pruneDexCache();
+                for (String instructionSet : instructionSets) {
+                    mInstaller.pruneDexCache(instructionSet);
+                }
+
+                // Additionally, delete all dex files from the root directory
+                // since there shouldn't be any there anyway, unless we're upgrading
+                // from an older OS version or a build that contained the "old" style
+                // flat scheme.
+                mInstaller.pruneDexCache(".");
             }
 
             // Collect vendor overlay packages.