Move to new art dalvikvm

Change-Id: Ib04bc9853b7084965fa0c9899c3e5f5ac42d4ce7

2 files changed, 264 insertions, 0 deletions

diff --git a/dalvikvm/Android.mk b/dalvikvm/Android.mk
new file mode 100644
index 0000000..869478d
--- /dev/null
+++ b/dalvikvm/Android.mk
@@ -0,0 +1,39 @@
+#
+# Copyright (C) 2013 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+LOCAL_PATH := $(call my-dir)
+
+include $(CLEAR_VARS)
+LOCAL_MODULE := dalvikvm
+LOCAL_MODULE_TAGS := optional
+LOCAL_CPP_EXTENSION := cc
+LOCAL_SRC_FILES := dalvikvm.cc
+LOCAL_CFLAGS := -Werror
+LOCAL_SHARED_LIBRARIES := libnativehelper libstlport libdl
+LOCAL_ADDITIONAL_DEPENDENCIES := $(LOCAL_PATH)/Android.mk
+include external/stlport/libstlport.mk
+include $(BUILD_EXECUTABLE)
+
+include $(CLEAR_VARS)
+LOCAL_MODULE := dalvikvm
+LOCAL_MODULE_TAGS := optional
+LOCAL_CPP_EXTENSION := cc
+LOCAL_SRC_FILES := dalvikvm.cc
+LOCAL_CFLAGS := -Werror
+LOCAL_SHARED_LIBRARIES := libnativehelper
+LOCAL_LDFLAGS := -ldl
+LOCAL_ADDITIONAL_DEPENDENCIES := $(LOCAL_PATH)/Android.mk
+include $(BUILD_HOST_EXECUTABLE)
diff --git a/dalvikvm/dalvikvm.cc b/dalvikvm/dalvikvm.cc
new file mode 100644
index 0000000..8612683
--- /dev/null
+++ b/dalvikvm/dalvikvm.cc
@@ -0,0 +1,225 @@
+/*
+ * copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <dlfcn.h>
+#include <signal.h>
+
+#include <cstdio>
+#include <cstring>
+#include <string>
+
+#include "jni.h"
+#include "ScopedLocalRef.h"
+#include "toStringArray.h"
+#include "UniquePtr.h"
+
+namespace art {
+
+// Determine whether or not the specified method is public.
+static bool IsMethodPublic(JNIEnv* env, jclass c, jmethodID method_id) {
+  ScopedLocalRef<jobject> reflected(env, env->ToReflectedMethod(c, method_id, JNI_FALSE));
+  if (reflected.get() == NULL) {
+    fprintf(stderr, "Failed to get reflected method\n");
+    return false;
+  }
+  // We now have a Method instance.  We need to call its
+  // getModifiers() method.
+  jclass method_class = env->FindClass("java/lang/reflect/Method");
+  if (method_class == NULL) {
+    fprintf(stderr, "Failed to find class java.lang.reflect.Method\n");
+    return false;
+  }
+  jmethodID mid = env->GetMethodID(method_class, "getModifiers", "()I");
+  if (mid == NULL) {
+    fprintf(stderr, "Failed to find java.lang.reflect.Method.getModifiers\n");
+    return false;
+  }
+  int modifiers = env->CallIntMethod(reflected.get(), mid);
+  static const int PUBLIC = 0x0001;  // java.lang.reflect.Modifiers.PUBLIC
+  if ((modifiers & PUBLIC) == 0) {
+    return false;
+  }
+  return true;
+}
+
+static int InvokeMain(JNIEnv* env, char** argv) {
+  // We want to call main() with a String array with our arguments in
+  // it.  Create an array and populate it.  Note argv[0] is not
+  // included.
+  ScopedLocalRef<jobjectArray> args(env, toStringArray(env, argv + 1));
+  if (args.get() == NULL) {
+    env->ExceptionDescribe();
+    return EXIT_FAILURE;
+  }
+
+  // Find [class].main(String[]).
+
+  // Convert "com.android.Blah" to "com/android/Blah".
+  std::string class_name(argv[0]);
+  std::replace(class_name.begin(), class_name.end(), '.', '/');
+
+  ScopedLocalRef<jclass> klass(env, env->FindClass(class_name.c_str()));
+  if (klass.get() == NULL) {
+    fprintf(stderr, "Unable to locate class '%s'\n", class_name.c_str());
+    env->ExceptionDescribe();
+    return EXIT_FAILURE;
+  }
+
+  jmethodID method = env->GetStaticMethodID(klass.get(), "main", "([Ljava/lang/String;)V");
+  if (method == NULL) {
+    fprintf(stderr, "Unable to find static main(String[]) in '%s'\n", class_name.c_str());
+    env->ExceptionDescribe();
+    return EXIT_FAILURE;
+  }
+
+  // Make sure the method is public.  JNI doesn't prevent us from
+  // calling a private method, so we have to check it explicitly.
+  if (!IsMethodPublic(env, klass.get(), method)) {
+    fprintf(stderr, "Sorry, main() is not public in '%s'\n", class_name.c_str());
+    env->ExceptionDescribe();
+    return EXIT_FAILURE;
+  }
+
+  // Invoke main().
+  env->CallStaticVoidMethod(klass.get(), method, args.get());
+
+  // Check whether there was an uncaught exception. We don't log any uncaught exception here;
+  // detaching this thread will do that for us, but it will clear the exception (and invalidate
+  // our JNIEnv), so we need to check here.
+  return env->ExceptionCheck() ? EXIT_FAILURE : EXIT_SUCCESS;
+}
+
+// Parse arguments.  Most of it just gets passed through to the runtime.
+// The JNI spec defines a handful of standard arguments.
+static int dalvikvm(int argc, char** argv) {
+  setvbuf(stdout, NULL, _IONBF, 0);
+
+  // Skip over argv[0].
+  argv++;
+  argc--;
+
+  // If we're adding any additional stuff, e.g. function hook specifiers,
+  // add them to the count here.
+  //
+  // We're over-allocating, because this includes the options to the runtime
+  // plus the options to the program.
+  int option_count = argc;
+  UniquePtr<JavaVMOption[]> options(new JavaVMOption[option_count]());
+
+  // Copy options over.  Everything up to the name of the class starts
+  // with a '-' (the function hook stuff is strictly internal).
+  //
+  // [Do we need to catch & handle "-jar" here?]
+  bool need_extra = false;
+  const char* lib = "libdvm.so";
+  const char* debug = NULL;
+  const char* what = NULL;
+  int curr_opt, arg_idx;
+  for (curr_opt = arg_idx = 0; arg_idx < argc; arg_idx++) {
+    if (argv[arg_idx][0] != '-' && !need_extra) {
+      break;
+    }
+    if (strncmp(argv[arg_idx], "-XXlib:", strlen("-XXlib:")) == 0) {
+      lib = argv[arg_idx] + strlen("-XXlib:");
+      continue;
+    }
+
+    options[curr_opt++].optionString = argv[arg_idx];
+
+    // Some options require an additional argument.
+    need_extra = false;
+    if (strcmp(argv[arg_idx], "-classpath") == 0 || strcmp(argv[arg_idx], "-cp") == 0) {
+      need_extra = true;
+      what = argv[arg_idx];
+    }
+  }
+
+  if (need_extra) {
+    fprintf(stderr, "%s must be followed by an additional argument giving a value\n", what);
+    return EXIT_FAILURE;
+  }
+
+  // Make sure they provided a class name.
+  if (arg_idx == argc) {
+    fprintf(stderr, "Class name required\n");
+    return EXIT_FAILURE;
+  }
+
+  // insert additional internal options here
+
+  if (curr_opt >= option_count) {
+    fprintf(stderr, "curr_opt(%d) >= option_count(%d)\n", curr_opt, option_count);
+    abort();
+    return EXIT_FAILURE;
+  }
+
+  // Find the JNI_CreateJavaVM implementation.
+  std::string library(lib);
+  if (debug != NULL) {
+    library += debug;
+  }
+  void* handle = dlopen(library.c_str(), RTLD_NOW);
+  if (handle == NULL) {
+    fprintf(stderr, "Failed to dlopen library %s: %s\n", library.c_str(), dlerror());
+    return EXIT_FAILURE;
+  }
+  const char* symbol = "JNI_CreateJavaVM";
+  void* sym = dlsym(handle, symbol);
+  if (handle == NULL) {
+    fprintf(stderr, "Failed to find symbol %s: %s\n", symbol, dlerror());
+    return EXIT_FAILURE;
+  }
+  typedef int (*Fn)(JavaVM** p_vm, JNIEnv** p_env, void* vm_args);
+  Fn JNI_CreateJavaVM = reinterpret_cast<Fn>(sym);
+
+  JavaVMInitArgs init_args;
+  init_args.version = JNI_VERSION_1_6;
+  init_args.options = options.get();
+  init_args.nOptions = curr_opt;
+  init_args.ignoreUnrecognized = JNI_FALSE;
+
+  // Start the runtime. The current thread becomes the main thread.
+  JavaVM* vm = NULL;
+  JNIEnv* env = NULL;
+  if (JNI_CreateJavaVM(&vm, &env, &init_args) != JNI_OK) {
+    fprintf(stderr, "Failed to initialize runtime (check log for details)\n");
+    return EXIT_FAILURE;
+  }
+
+  int rc = InvokeMain(env, &argv[arg_idx]);
+
+#if defined(NDEBUG)
+  // The DestroyJavaVM call will detach this thread for us. In debug builds, we don't want to
+  // detach because detaching disables the CheckSafeToLockOrUnlock checking.
+  if (vm->DetachCurrentThread() != JNI_OK) {
+    fprintf(stderr, "Warning: unable to detach main thread\n");
+    rc = EXIT_FAILURE;
+  }
+#endif
+
+  if (vm->DestroyJavaVM() != 0) {
+    fprintf(stderr, "Warning: runtime did not shut down cleanly\n");
+    rc = EXIT_FAILURE;
+  }
+
+  return rc;
+}
+
+} // namespace art
+
+int main(int argc, char** argv) {
+  return art::dalvikvm(argc, argv);
+}