Frameworks/base: AndroidRuntime standalone preloaded-classes

Change AndroidRuntime::startVM to give the new standalone
preloaded-classes file to the runtime for compilation of images.

Bug: 18305157

(cherry picked from commit 995c62d6ab)

Change-Id: I32a13357893222b25fbce60bf2367c23fb36ab22

core/jni/AndroidRuntime.cpp

@@ -348,6 +348,15 @@ static int hasDir(const char* dir)
     return 0;
 }
 
+static bool hasFile(const char* file) {
+    struct stat s;
+    int res = stat(file, &s);
+    if (res == 0) {
+        return S_ISREG(s.st_mode);
+    }
+    return false;
+}
+
 /*
  * Read the persistent locale.
  */
@@ -760,10 +769,16 @@ int AndroidRuntime::startVm(JavaVM** pJavaVM, JNIEnv** pEnv)
             parseCompilerOption("dalvik.vm.image-dex2oat-filter", dex2oatImageCompilerFilterBuf,
                                 "--compiler-filter=", "-Ximage-compiler-option");
         }
+
+        // Make sure there is a preloaded-classes file.
+        if (!hasFile("/system/etc/preloaded-classes")) {
+            ALOGE("Missing preloaded-classes file, /system/etc/preloaded-classes not found: %s\n",
+                  strerror(errno));
+            goto bail;
+        }
         addOption("-Ximage-compiler-option");
-        addOption("--image-classes-zip=/system/framework/framework.jar");
-        addOption("-Ximage-compiler-option");
-        addOption("--image-classes=preloaded-classes");
+        addOption("--image-classes=/system/etc/preloaded-classes");
+
         property_get("dalvik.vm.image-dex2oat-flags", dex2oatImageFlagsBuf, "");
         parseExtraOpts(dex2oatImageFlagsBuf, "-Ximage-compiler-option");