src/content/shell/android/linker_test_apk/src/org/chromium/content_linker_test_apk/LinkerTests.java

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 package org.chromium.content_linker_test_apk;
   6
   7 import android.util.Log;
   8
   9 import org.chromium.base.JNINamespace;
  10 import org.chromium.content.app.Linker;
  11
  12 // A class that is only used in linker test APK to perform runtime checks
  13 // in the current process.
  14 @JNINamespace("content")
  15 public class LinkerTests implements Linker.TestRunner {
  16     private static final String TAG = "LinkerTests";
  17
  18     public LinkerTests() {}
  19
  20     public boolean runChecks(int memoryDeviceConfig,
  21                              boolean isBrowserProcess) {
  22         boolean checkSharedRelro;
  23         if (isBrowserProcess) {
  24             switch (Linker.BROWSER_SHARED_RELRO_CONFIG) {
  25                 case Linker.BROWSER_SHARED_RELRO_CONFIG_NEVER:
  26                     checkSharedRelro = false;
  27                     break;
  28                 case Linker.BROWSER_SHARED_RELRO_CONFIG_LOW_RAM_ONLY:
  29                     // A shared RELRO should only be used on low-end devices.
  30                     checkSharedRelro =
  31                             (memoryDeviceConfig == Linker.MEMORY_DEVICE_CONFIG_LOW);
  32                     break;
  33                 case Linker.BROWSER_SHARED_RELRO_CONFIG_ALWAYS:
  34                     // Always check for a shared RELRO.
  35                     checkSharedRelro = true;
  36                     break;
  37                 default:
  38                     Log.e(TAG, "Invalid shared RELRO linker configuration: " +
  39                           Linker.BROWSER_SHARED_RELRO_CONFIG);
  40                     return false;
  41             }
  42         } else {
  43           // Service processes should always use a shared RELRO section.
  44           checkSharedRelro = true;
  45         }
  46
  47         if (checkSharedRelro)
  48             return nativeCheckForSharedRelros(isBrowserProcess);
  49         else
  50             return nativeCheckForNoSharedRelros(isBrowserProcess);
  51     }
  52
  53     // Check that there are shared RELRO sections in the current process,
  54     // and that they are properly mapped read-only. Returns true on success.
  55     private static native boolean nativeCheckForSharedRelros(boolean isBrowserProcess);
  56
  57     // Check that there are no shared RELRO sections in the current process,
  58     // return true on success.
  59     private static native boolean nativeCheckForNoSharedRelros(boolean isBrowserProcess);
  60
  61 }