Android: Add chrome-specific dynamic linker.

content/public/android/java/src/org/chromium/content/app/LibraryLoader.java

Index: content/public/android/java/src/org/chromium/content/app/LibraryLoader.java
diff --git a/content/public/android/java/src/org/chromium/content/app/LibraryLoader.java b/content/public/android/java/src/org/chromium/content/app/LibraryLoader.java
index bf64b4feae831154cf77918067be6c29bd07b67b..b75803eb46af2ea8e07d8e4e62662e65bb0d7091 100644
--- a/content/public/android/java/src/org/chromium/content/app/LibraryLoader.java
+++ b/content/public/android/java/src/org/chromium/content/app/LibraryLoader.java
@@ -7,7 +7,9 @@ package org.chromium.content.app;
 import android.text.TextUtils;
 import android.util.Log;
 
+import org.chromium.base.Linker;
 import org.chromium.base.JNINamespace;
+import org.chromium.content.browser.ChildProcessLauncher;
 import org.chromium.content.common.CommandLine;
 import org.chromium.content.common.ProcessInitException;
 import org.chromium.content.common.ResultCodes;
@@ -42,6 +44,10 @@ public class LibraryLoader {
     // library_loader_hooks.cc).
     private static boolean sInitialized = false;
 
+    public static boolean useCrazyLinker() {
+        return NativeLibraries.USE_CRAZY_LINKER;
+    }
+
     // TODO(cjhopman): Remove this once it's unused.
     /**
      * Doesn't do anything.
@@ -61,6 +67,8 @@ public class LibraryLoader {
             }
             loadAlreadyLocked();
             initializeAlreadyLocked(CommandLine.getJavaSwitchesOrNull());
+            if (useCrazyLinker())
+                ChildProcessLauncher.setRelroBundle(Linker.getRelroBundle());
         }
     }
 
@@ -108,10 +116,14 @@ public class LibraryLoader {
         try {
             if (!sLoaded) {
                 assert !sInitialized;
-                for (String sLibrary : NativeLibraries.libraries) {
-                    Log.i(TAG, "loading: " + sLibrary);
-                    System.loadLibrary(sLibrary);
-                    Log.i(TAG, "loaded: " + sLibrary);
+                for (String library : NativeLibraries.libraries) {
+                    Log.i(TAG, "Loading: " + library);
+                    if (useCrazyLinker()) {
+                        Linker.loadLibrary(library);
+                    } else if (!library.equals("crazy_linker")) {
+                        System.loadLibrary(library);
+                    }
+                    Log.i(TAG, "Loaded: " + library);
                 }
                 sLoaded = true;
             }
@@ -138,6 +150,9 @@ public class LibraryLoader {
         sInitialized = true;
         CommandLine.enableNativeProxy();
         TraceEvent.setEnabledToMatchNative();
+        // Record histogram for crazy linker.
+        if (useCrazyLinker())
+          nativeRecordCrazyLinkerHistogram(Linker.loadAtFixedAddressFailed());
     }
 
     // This is the only method that is registered during System.loadLibrary. We then call it
@@ -148,4 +163,9 @@ public class LibraryLoader {
     // Return 0 on success, otherwise return the error code from
     // content/public/common/result_codes.h.
     private static native int nativeLibraryLoaded(String[] initCommandLine);
+
+    // Method called to register if the crazy linker was able to load library at a fixed address.
+     // This is called once the library loading is done and successful.
+    private static native void nativeRecordCrazyLinkerHistogram(
+         boolean loadedAtFixedAddressFailed);
 }