Make sure StrictMode allows disk reads when calling isThreadInProcess.

If an application thread disables disk reads on the main thread,
isThreadInProcess will trigger a strict mode violation. This is bad if
the RenderThread is created after disk reads have been disallowed.

bug 30170339

Change-Id: I6918605d11f0c586c156f3168051376c3209b3f1

1 files changed, 4 insertions, 0 deletions

diff --git a/core/java/android/os/Process.java b/core/java/android/os/Process.java
index 84d2c98ba93d..57b40e559ccd 100644
--- a/core/java/android/os/Process.java
+++ b/core/java/android/os/Process.java
@@ -1263,6 +1263,7 @@ public class Process {
      * @hide
      */
     public static final boolean isThreadInProcess(int tid, int pid) {
+        StrictMode.ThreadPolicy oldPolicy = StrictMode.allowThreadDiskReads();
         try {
             if (Os.access("/proc/" + tid + "/task/" + pid, OsConstants.F_OK)) {
                 return true;
@@ -1271,6 +1272,9 @@ public class Process {
             }
         } catch (Exception e) {
             return false;
+        } finally {
+            StrictMode.setThreadPolicy(oldPolicy);
         }
+
     }
 }