Merge "libcore: Remove native calls in FileDescriptor <clinit>" into rvc-dev
diff --git a/dalvik/src/main/java/dalvik/system/ZygoteHooks.java b/dalvik/src/main/java/dalvik/system/ZygoteHooks.java
index 0339b4d..475acd9 100644
--- a/dalvik/src/main/java/dalvik/system/ZygoteHooks.java
+++ b/dalvik/src/main/java/dalvik/system/ZygoteHooks.java
@@ -21,6 +21,7 @@
import android.icu.util.ULocale;
import java.io.File;
+import java.io.FileDescriptor;
/**
* Provides hooks for the zygote to call back into the runtime to perform
@@ -67,6 +68,11 @@
public static void onEndPreload() {
// All cache references created by ICU from this point will be soft.
CacheValue.setStrength(CacheValue.Strength.SOFT);
+
+ // Clone standard descriptors as originals closed / rebound during zygote post fork.
+ FileDescriptor.in.cloneForFork();
+ FileDescriptor.out.cloneForFork();
+ FileDescriptor.err.cloneForFork();
}
/**
diff --git a/luni/src/test/java/libcore/java/io/FileDescriptorTest.java b/luni/src/test/java/libcore/java/io/FileDescriptorTest.java
index 3e82690..390cfd6 100644
--- a/luni/src/test/java/libcore/java/io/FileDescriptorTest.java
+++ b/luni/src/test/java/libcore/java/io/FileDescriptorTest.java
@@ -16,7 +16,10 @@
package libcore.java.io;
+import android.system.Os;
+
import java.io.File;
+import java.io.FileDescriptor;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
@@ -24,6 +27,8 @@
import java.net.ServerSocket;
import junit.framework.TestCase;
+import static org.junit.Assert.assertNotEquals;
+
public class FileDescriptorTest extends TestCase {
public void testReadOnlyFileDescriptorSync() throws Exception {
File f= File.createTempFile("FileDescriptorTest", "tmp");
@@ -40,4 +45,31 @@
assertTrue(s.getImpl().getFD$().isSocket$());
s.close();
}
+
+ public void testStaticFileDescriptors() {
+ assertTrue(FileDescriptor.in.valid());
+ assertTrue(FileDescriptor.out.valid());
+ assertTrue(FileDescriptor.err.valid());
+ }
+
+ public void testFileDescriptorCloneForFork() throws Exception {
+ FileDescriptor [] sources = { FileDescriptor.in, FileDescriptor.out, FileDescriptor.err };
+ for (FileDescriptor source : sources) {
+ // Create a new file descriptor and set it's native descriptor to each of the well
+ // known descriptors in FileDescriptor.
+ FileDescriptor target = new FileDescriptor();
+ target.setInt$(source.getInt$());
+ assertEquals(target.getInt$(), source.getInt$());
+
+ // Clone file descriptor, this creates a native file descriptor.
+ target.cloneForFork();
+ assertTrue(source.valid());
+ assertTrue(target.valid());
+ assertNotEquals(target.getInt$(), source.getInt$());
+
+ // Clean-up native resource we allocated in cloneForFork. Os.close() may throw
+ // an ErrnoException.
+ Os.close(target);
+ }
+ }
}
diff --git a/ojluni/src/main/java/java/io/FileDescriptor.java b/ojluni/src/main/java/java/io/FileDescriptor.java
index ed3ebfe..98db443 100644
--- a/ojluni/src/main/java/java/io/FileDescriptor.java
+++ b/ojluni/src/main/java/java/io/FileDescriptor.java
@@ -82,8 +82,7 @@
*
* @see java.lang.System#in
*/
- // Android-changed: Duplicates of FDs needed for RuntimeInit#redirectLogStreams
- public static final FileDescriptor in = dupFd(0);
+ public static final FileDescriptor in = new FileDescriptor(0);
/**
* A handle to the standard output stream. Usually, this file
@@ -91,8 +90,7 @@
* known as <code>System.out</code>.
* @see java.lang.System#out
*/
- // Android-changed: Duplicates of FDs needed for RuntimeInit#redirectLogStreams
- public static final FileDescriptor out = dupFd(1);
+ public static final FileDescriptor out = new FileDescriptor(1);
/**
* A handle to the standard error stream. Usually, this file
@@ -101,8 +99,7 @@
*
* @see java.lang.System#err
*/
- // Android-changed: Duplicates of FDs needed for RuntimeInit#redirectLogStreams
- public static final FileDescriptor err = dupFd(2);
+ public static final FileDescriptor err = new FileDescriptor(2);
/**
* Tests if this file descriptor object is valid.
@@ -169,6 +166,26 @@
this.descriptor = fd;
}
+ // BEGIN Android-added: Method to clone standard file descriptors.
+ // Required as a consequence of RuntimeInit#redirectLogStreams. Cloning is used in
+ // ZygoteHooks.onEndPreload().
+ /**
+ * Clones the current native file descriptor and uses this for this FileDescriptor instance.
+ *
+ * This method does not close the current native file descriptor.
+ *
+ * @hide internal use only
+ */
+ public void cloneForFork() {
+ try {
+ int newDescriptor = Os.fcntlInt(this, F_DUPFD_CLOEXEC, 0);
+ this.descriptor = newDescriptor;
+ } catch (ErrnoException e) {
+ throw new RuntimeException(e);
+ }
+ }
+ // END Android-added: Method to clone standard file descriptors.
+
// BEGIN Android-added: Methods to enable ownership enforcement of Unix file descriptors.
/**
* Returns the owner ID of this FileDescriptor. It's highly unlikely you should be calling this.
@@ -214,15 +231,6 @@
return isSocket(descriptor);
}
- // Android-added: Needed for RuntimeInit#redirectLogStreams.
- private static FileDescriptor dupFd(int fd) {
- try {
- return new FileDescriptor(Os.fcntlInt(new FileDescriptor(fd), F_DUPFD_CLOEXEC, 0));
- } catch (ErrnoException e) {
- throw new RuntimeException(e);
- }
- }
-
private static native boolean isSocket(int descriptor);
// Set up JavaIOFileDescriptorAccess in SharedSecrets
static {