java_lang_Class.cc revision 1eb512d33f94d1dd7ea38263307ba0f7a0dfa653
1/* 2 * Copyright (C) 2008 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#include "class_linker.h" 18#include "dex_file-inl.h" 19#include "jni_internal.h" 20#include "nth_caller_visitor.h" 21#include "mirror/class-inl.h" 22#include "mirror/class_loader.h" 23#include "mirror/object-inl.h" 24#include "mirror/proxy.h" 25#include "object_utils.h" 26#include "scoped_thread_state_change.h" 27#include "scoped_fast_native_object_access.h" 28#include "ScopedLocalRef.h" 29#include "ScopedUtfChars.h" 30#include "well_known_classes.h" 31 32namespace art { 33 34static mirror::Class* DecodeClass(const ScopedFastNativeObjectAccess& soa, jobject java_class) 35 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 36 mirror::Class* c = soa.Decode<mirror::Class*>(java_class); 37 DCHECK(c != NULL); 38 DCHECK(c->IsClass()); 39 // TODO: we could EnsureInitialized here, rather than on every reflective get/set or invoke . 40 // For now, we conservatively preserve the old dalvik behavior. A quick "IsInitialized" check 41 // every time probably doesn't make much difference to reflection performance anyway. 42 return c; 43} 44 45// "name" is in "binary name" format, e.g. "dalvik.system.Debug$1". 46static jclass Class_classForName(JNIEnv* env, jclass, jstring javaName, jboolean initialize, jobject javaLoader) { 47 ScopedObjectAccess soa(env); 48 ScopedUtfChars name(env, javaName); 49 if (name.c_str() == NULL) { 50 return NULL; 51 } 52 53 // We need to validate and convert the name (from x.y.z to x/y/z). This 54 // is especially handy for array types, since we want to avoid 55 // auto-generating bogus array classes. 56 if (!IsValidBinaryClassName(name.c_str())) { 57 ThrowLocation throw_location = soa.Self()->GetCurrentLocationForThrow(); 58 soa.Self()->ThrowNewExceptionF(throw_location, "Ljava/lang/ClassNotFoundException;", 59 "Invalid name: %s", name.c_str()); 60 return NULL; 61 } 62 63 std::string descriptor(DotToDescriptor(name.c_str())); 64 mirror::ClassLoader* class_loader = soa.Decode<mirror::ClassLoader*>(javaLoader); 65 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 66 mirror::Class* c = class_linker->FindClass(descriptor.c_str(), class_loader); 67 if (c == NULL) { 68 ScopedLocalRef<jthrowable> cause(env, env->ExceptionOccurred()); 69 env->ExceptionClear(); 70 jthrowable cnfe = reinterpret_cast<jthrowable>(env->NewObject(WellKnownClasses::java_lang_ClassNotFoundException, 71 WellKnownClasses::java_lang_ClassNotFoundException_init, 72 javaName, cause.get())); 73 env->Throw(cnfe); 74 return NULL; 75 } 76 if (initialize) { 77 class_linker->EnsureInitialized(c, true, true); 78 } 79 return soa.AddLocalReference<jclass>(c); 80} 81 82static jstring Class_getNameNative(JNIEnv* env, jobject javaThis) { 83 ScopedFastNativeObjectAccess soa(env); 84 mirror::Class* c = DecodeClass(soa, javaThis); 85 return soa.AddLocalReference<jstring>(c->ComputeName()); 86} 87 88static jobjectArray Class_getProxyInterfaces(JNIEnv* env, jobject javaThis) { 89 ScopedFastNativeObjectAccess soa(env); 90 mirror::SynthesizedProxyClass* c = 91 down_cast<mirror::SynthesizedProxyClass*>(DecodeClass(soa, javaThis)); 92 return soa.AddLocalReference<jobjectArray>(c->GetInterfaces()->Clone(soa.Self())); 93} 94 95static JNINativeMethod gMethods[] = { 96 NATIVE_METHOD(Class, classForName, "(Ljava/lang/String;ZLjava/lang/ClassLoader;)Ljava/lang/Class;"), 97 NATIVE_METHOD(Class, getNameNative, "!()Ljava/lang/String;"), 98 NATIVE_METHOD(Class, getProxyInterfaces, "!()[Ljava/lang/Class;"), 99}; 100 101void register_java_lang_Class(JNIEnv* env) { 102 REGISTER_NATIVE_METHODS("java/lang/Class"); 103} 104 105} // namespace art 106