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Elliott Hughes2faa5f12012-01-30 14:42:07 -08001/*
2 * Copyright (C) 2011 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 */
Carl Shapiro0e5d75d2011-07-06 18:28:37 -070016
Brian Carlstrom578bbdc2011-07-21 14:07:47 -070017#include "class_linker.h"
Carl Shapiro0e5d75d2011-07-06 18:28:37 -070018
Brian Carlstromd601af82012-01-06 10:15:19 -080019#include <fcntl.h>
20#include <sys/file.h>
21#include <sys/stat.h>
Brian Carlstromdbf05b72011-12-15 00:55:24 -080022#include <sys/types.h>
23#include <sys/wait.h>
24
Brian Carlstromdbc05252011-09-09 01:59:59 -070025#include <deque>
Ian Rogers0cfe1fb2011-08-26 03:29:44 -070026#include <string>
Carl Shapiro0e5d75d2011-07-06 18:28:37 -070027#include <utility>
Elliott Hughes90a33692011-08-30 13:27:07 -070028#include <vector>
Carl Shapiro0e5d75d2011-07-06 18:28:37 -070029
Brian Carlstrom578bbdc2011-07-21 14:07:47 -070030#include "casts.h"
Brian Carlstrom1f870082011-08-23 16:02:11 -070031#include "class_loader.h"
Elliott Hughes4740cdf2011-12-07 14:07:12 -080032#include "debugger.h"
Brian Carlstrom7e49dca2011-07-22 18:07:34 -070033#include "dex_cache.h"
Elliott Hughes90a33692011-08-30 13:27:07 -070034#include "dex_file.h"
Brian Carlstrom578bbdc2011-07-21 14:07:47 -070035#include "dex_verifier.h"
36#include "heap.h"
Elliott Hughescf4c6c42011-09-01 15:16:42 -070037#include "intern_table.h"
Ian Rogers0571d352011-11-03 19:51:38 -070038#include "leb128.h"
Brian Carlstrom578bbdc2011-07-21 14:07:47 -070039#include "logging.h"
Brian Carlstrom58ae9412011-10-04 00:56:06 -070040#include "oat_file.h"
Brian Carlstrom578bbdc2011-07-21 14:07:47 -070041#include "object.h"
Ian Rogers6d4d9fc2011-11-30 16:24:48 -080042#include "object_utils.h"
Brian Carlstrom5b332c82012-02-01 15:02:31 -080043#include "os.h"
Brian Carlstrom1f870082011-08-23 16:02:11 -070044#include "runtime.h"
Ian Rogers466bb252011-10-14 03:29:56 -070045#include "runtime_support.h"
Elliott Hughes4d0207c2011-10-03 19:14:34 -070046#include "ScopedLocalRef.h"
Brian Carlstroma663ea52011-08-19 23:33:41 -070047#include "space.h"
Brian Carlstrom40381fb2011-10-19 14:13:40 -070048#include "stack_indirect_reference_table.h"
Brian Carlstrom58ae9412011-10-04 00:56:06 -070049#include "stl_util.h"
Brian Carlstrom578bbdc2011-07-21 14:07:47 -070050#include "thread.h"
Elliott Hughes54e7df12011-09-16 11:47:04 -070051#include "UniquePtr.h"
Brian Carlstrom578bbdc2011-07-21 14:07:47 -070052#include "utils.h"
Carl Shapiro0e5d75d2011-07-06 18:28:37 -070053
54namespace art {
55
Elliott Hughes0512f022012-03-15 22:10:52 -070056static void ThrowNoClassDefFoundError(const char* fmt, ...) __attribute__((__format__(__printf__, 1, 2)));
57static void ThrowNoClassDefFoundError(const char* fmt, ...) {
Elliott Hughes4a2b4172011-09-20 17:08:25 -070058 va_list args;
59 va_start(args, fmt);
60 Thread::Current()->ThrowNewExceptionV("Ljava/lang/NoClassDefFoundError;", fmt, args);
61 va_end(args);
62}
63
Elliott Hughes0512f022012-03-15 22:10:52 -070064static void ThrowClassFormatError(const char* fmt, ...) __attribute__((__format__(__printf__, 1, 2)));
65static void ThrowClassFormatError(const char* fmt, ...) {
Elliott Hughes4a2b4172011-09-20 17:08:25 -070066 va_list args;
67 va_start(args, fmt);
Elliott Hughese555dc02011-09-25 10:46:35 -070068 Thread::Current()->ThrowNewExceptionV("Ljava/lang/ClassFormatError;", fmt, args);
Elliott Hughes4a2b4172011-09-20 17:08:25 -070069 va_end(args);
70}
71
Elliott Hughes0512f022012-03-15 22:10:52 -070072static void ThrowLinkageError(const char* fmt, ...) __attribute__((__format__(__printf__, 1, 2)));
73static void ThrowLinkageError(const char* fmt, ...) {
Elliott Hughes4a2b4172011-09-20 17:08:25 -070074 va_list args;
75 va_start(args, fmt);
76 Thread::Current()->ThrowNewExceptionV("Ljava/lang/LinkageError;", fmt, args);
77 va_end(args);
78}
79
Elliott Hughes0512f022012-03-15 22:10:52 -070080static void ThrowNoSuchMethodError(bool is_direct, Class* c, const StringPiece& name,
81 const StringPiece& signature) {
Ian Rogers6d4d9fc2011-11-30 16:24:48 -080082 ClassHelper kh(c);
Elliott Hughes3b6baaa2011-10-14 19:13:56 -070083 std::ostringstream msg;
Ian Rogersc8b306f2012-02-17 21:34:44 -080084 msg << "no " << (is_direct ? "direct" : "virtual") << " method " << name << signature
Ian Rogers9f1ab122011-12-12 08:52:43 -080085 << " in class " << kh.GetDescriptor() << " or its superclasses";
Ian Rogers6d4d9fc2011-11-30 16:24:48 -080086 std::string location(kh.GetLocation());
87 if (!location.empty()) {
88 msg << " (defined in " << location << ")";
Elliott Hughescc5f9a92011-09-28 19:17:29 -070089 }
Elliott Hughes5cb5ad22011-10-02 12:13:39 -070090 Thread::Current()->ThrowNewException("Ljava/lang/NoSuchMethodError;", msg.str().c_str());
Elliott Hughescc5f9a92011-09-28 19:17:29 -070091}
92
Elliott Hughes0512f022012-03-15 22:10:52 -070093static void ThrowNoSuchFieldError(const StringPiece& scope, Class* c, const StringPiece& type,
94 const StringPiece& name) {
Ian Rogers9f1ab122011-12-12 08:52:43 -080095 ClassHelper kh(c);
96 std::ostringstream msg;
Ian Rogersb067ac22011-12-13 18:05:09 -080097 msg << "no " << scope << "field " << name << " of type " << type
Ian Rogers9f1ab122011-12-12 08:52:43 -080098 << " in class " << kh.GetDescriptor() << " or its superclasses";
99 std::string location(kh.GetLocation());
100 if (!location.empty()) {
101 msg << " (defined in " << location << ")";
102 }
103 Thread::Current()->ThrowNewException("Ljava/lang/NoSuchFieldError;", msg.str().c_str());
104}
105
Elliott Hughes0512f022012-03-15 22:10:52 -0700106static void ThrowNullPointerException(const char* fmt, ...) __attribute__((__format__(__printf__, 1, 2)));
107static void ThrowNullPointerException(const char* fmt, ...) {
Ian Rogerscab01012012-01-10 17:35:46 -0800108 va_list args;
109 va_start(args, fmt);
110 Thread::Current()->ThrowNewExceptionV("Ljava/lang/NullPointerException;", fmt, args);
111 va_end(args);
112}
113
Elliott Hughes0512f022012-03-15 22:10:52 -0700114static void ThrowEarlierClassFailure(Class* c) {
Elliott Hughes4a2b4172011-09-20 17:08:25 -0700115 /*
116 * The class failed to initialize on a previous attempt, so we want to throw
117 * a NoClassDefFoundError (v2 2.17.5). The exception to this rule is if we
118 * failed in verification, in which case v2 5.4.1 says we need to re-throw
119 * the previous error.
120 */
121 LOG(INFO) << "Rejecting re-init on previously-failed class " << PrettyClass(c);
122
Brian Carlstrom4d9716c2012-01-30 01:49:33 -0800123 CHECK(c->IsErroneous()) << PrettyClass(c);
Elliott Hughes4a2b4172011-09-20 17:08:25 -0700124 if (c->GetVerifyErrorClass() != NULL) {
125 // TODO: change the verifier to store an _instance_, with a useful detail message?
Ian Rogers6d4d9fc2011-11-30 16:24:48 -0800126 ClassHelper ve_ch(c->GetVerifyErrorClass());
127 std::string error_descriptor(ve_ch.GetDescriptor());
128 Thread::Current()->ThrowNewException(error_descriptor.c_str(), PrettyDescriptor(c).c_str());
Elliott Hughes4a2b4172011-09-20 17:08:25 -0700129 } else {
Ian Rogers6d4d9fc2011-11-30 16:24:48 -0800130 ThrowNoClassDefFoundError("%s", PrettyDescriptor(c).c_str());
Elliott Hughes4a2b4172011-09-20 17:08:25 -0700131 }
132}
133
Elliott Hughes0512f022012-03-15 22:10:52 -0700134static void WrapExceptionInInitializer() {
Elliott Hughes4d0207c2011-10-03 19:14:34 -0700135 JNIEnv* env = Thread::Current()->GetJniEnv();
136
137 ScopedLocalRef<jthrowable> cause(env, env->ExceptionOccurred());
138 CHECK(cause.get() != NULL);
139
140 env->ExceptionClear();
141
142 // TODO: add java.lang.Error to JniConstants?
143 ScopedLocalRef<jclass> error_class(env, env->FindClass("java/lang/Error"));
144 CHECK(error_class.get() != NULL);
145 if (env->IsInstanceOf(cause.get(), error_class.get())) {
146 // We only wrap non-Error exceptions; an Error can just be used as-is.
147 env->Throw(cause.get());
148 return;
149 }
150
151 // TODO: add java.lang.ExceptionInInitializerError to JniConstants?
152 ScopedLocalRef<jclass> eiie_class(env, env->FindClass("java/lang/ExceptionInInitializerError"));
153 CHECK(eiie_class.get() != NULL);
154
155 jmethodID mid = env->GetMethodID(eiie_class.get(), "<init>" , "(Ljava/lang/Throwable;)V");
156 CHECK(mid != NULL);
157
158 ScopedLocalRef<jthrowable> eiie(env,
159 reinterpret_cast<jthrowable>(env->NewObject(eiie_class.get(), mid, cause.get())));
160 env->Throw(eiie.get());
161}
162
Elliott Hughesc3b77c72011-12-15 20:56:48 -0800163static size_t Hash(const char* s) {
164 // This is the java.lang.String hashcode for convenience, not interoperability.
165 size_t hash = 0;
166 for (; *s != '\0'; ++s) {
167 hash = hash * 31 + *s;
168 }
169 return hash;
170}
171
Elliott Hughes418d20f2011-09-22 14:00:39 -0700172const char* ClassLinker::class_roots_descriptors_[] = {
Brian Carlstroma663ea52011-08-19 23:33:41 -0700173 "Ljava/lang/Class;",
174 "Ljava/lang/Object;",
Elliott Hughes418d20f2011-09-22 14:00:39 -0700175 "[Ljava/lang/Class;",
Brian Carlstroma663ea52011-08-19 23:33:41 -0700176 "[Ljava/lang/Object;",
177 "Ljava/lang/String;",
Elliott Hughesbf61ba32011-10-11 10:53:09 -0700178 "Ljava/lang/ref/Reference;",
Elliott Hughes80609252011-09-23 17:24:51 -0700179 "Ljava/lang/reflect/Constructor;",
Brian Carlstroma663ea52011-08-19 23:33:41 -0700180 "Ljava/lang/reflect/Field;",
181 "Ljava/lang/reflect/Method;",
Ian Rogers466bb252011-10-14 03:29:56 -0700182 "Ljava/lang/reflect/Proxy;",
Brian Carlstroma663ea52011-08-19 23:33:41 -0700183 "Ljava/lang/ClassLoader;",
184 "Ldalvik/system/BaseDexClassLoader;",
185 "Ldalvik/system/PathClassLoader;",
Ian Rogers5167c972012-02-03 10:41:20 -0800186 "Ljava/lang/Throwable;",
jeffhao8cd6dda2012-02-22 10:15:34 -0800187 "Ljava/lang/ClassNotFoundException;",
Shih-wei Liao55df06b2011-08-26 14:39:27 -0700188 "Ljava/lang/StackTraceElement;",
Brian Carlstroma663ea52011-08-19 23:33:41 -0700189 "Z",
190 "B",
191 "C",
192 "D",
193 "F",
194 "I",
195 "J",
196 "S",
197 "V",
198 "[Z",
199 "[B",
200 "[C",
201 "[D",
202 "[F",
203 "[I",
204 "[J",
205 "[S",
Shih-wei Liao55df06b2011-08-26 14:39:27 -0700206 "[Ljava/lang/StackTraceElement;",
Brian Carlstroma663ea52011-08-19 23:33:41 -0700207};
208
Brian Carlstroma004aa92012-02-08 18:05:09 -0800209ClassLinker* ClassLinker::CreateFromCompiler(const std::vector<const DexFile*>& boot_class_path,
210 InternTable* intern_table) {
Brian Carlstrom69b15fb2011-09-03 12:25:21 -0700211 CHECK_NE(boot_class_path.size(), 0U);
Elliott Hughes4dd9b4d2011-12-12 18:29:24 -0800212 UniquePtr<ClassLinker> class_linker(new ClassLinker(intern_table));
Brian Carlstroma004aa92012-02-08 18:05:09 -0800213 class_linker->InitFromCompiler(boot_class_path);
Brian Carlstrom58ae9412011-10-04 00:56:06 -0700214 return class_linker.release();
215}
216
Brian Carlstroma004aa92012-02-08 18:05:09 -0800217ClassLinker* ClassLinker::CreateFromImage(InternTable* intern_table) {
Elliott Hughes4dd9b4d2011-12-12 18:29:24 -0800218 UniquePtr<ClassLinker> class_linker(new ClassLinker(intern_table));
Brian Carlstrom58ae9412011-10-04 00:56:06 -0700219 class_linker->InitFromImage();
Carl Shapiro61e019d2011-07-14 16:53:09 -0700220 return class_linker.release();
221}
222
Elliott Hughes4dd9b4d2011-12-12 18:29:24 -0800223ClassLinker::ClassLinker(InternTable* intern_table)
224 : dex_lock_("ClassLinker dex lock"),
Brian Carlstrom47d237a2011-10-18 15:08:33 -0700225 classes_lock_("ClassLinker classes lock"),
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -0700226 class_roots_(NULL),
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700227 array_iftable_(NULL),
Elliott Hughescf4c6c42011-09-01 15:16:42 -0700228 init_done_(false),
229 intern_table_(intern_table) {
Elliott Hughes418d20f2011-09-22 14:00:39 -0700230 CHECK_EQ(arraysize(class_roots_descriptors_), size_t(kClassRootsMax));
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -0700231}
Brian Carlstroma663ea52011-08-19 23:33:41 -0700232
Brian Carlstroma004aa92012-02-08 18:05:09 -0800233void ClassLinker::InitFromCompiler(const std::vector<const DexFile*>& boot_class_path) {
234 VLOG(startup) << "ClassLinker::Init";
235 CHECK(Runtime::Current()->IsCompiler());
Brian Carlstrom0a5b14d2011-09-27 13:29:15 -0700236
Elliott Hughesd8ddfd52011-08-15 14:32:53 -0700237 CHECK(!init_done_);
Brian Carlstrom578bbdc2011-07-21 14:07:47 -0700238
Elliott Hughes30646832011-10-13 16:59:46 -0700239 // java_lang_Class comes first, it's needed for AllocClass
Elliott Hughesb3bd5f02012-03-08 21:05:27 -0800240 Heap* heap = Runtime::Current()->GetHeap();
241 SirtRef<Class> java_lang_Class(down_cast<Class*>(heap->AllocObject(NULL, sizeof(ClassClass))));
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700242 CHECK(java_lang_Class.get() != NULL);
243 java_lang_Class->SetClass(java_lang_Class.get());
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700244 java_lang_Class->SetClassSize(sizeof(ClassClass));
Brian Carlstrom75cb3b42011-07-28 02:13:36 -0700245 // AllocClass(Class*) can now be used
Brian Carlstroma0808032011-07-18 00:39:23 -0700246
Elliott Hughes418d20f2011-09-22 14:00:39 -0700247 // Class[] is used for reflection support.
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700248 SirtRef<Class> class_array_class(AllocClass(java_lang_Class.get(), sizeof(Class)));
249 class_array_class->SetComponentType(java_lang_Class.get());
Elliott Hughes418d20f2011-09-22 14:00:39 -0700250
Brian Carlstrom75cb3b42011-07-28 02:13:36 -0700251 // java_lang_Object comes next so that object_array_class can be created
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700252 SirtRef<Class> java_lang_Object(AllocClass(java_lang_Class.get(), sizeof(Class)));
253 CHECK(java_lang_Object.get() != NULL);
Brian Carlstrom75cb3b42011-07-28 02:13:36 -0700254 // backfill Object as the super class of Class
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700255 java_lang_Class->SetSuperClass(java_lang_Object.get());
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700256 java_lang_Object->SetStatus(Class::kStatusLoaded);
Brian Carlstroma0808032011-07-18 00:39:23 -0700257
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700258 // Object[] next to hold class roots
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700259 SirtRef<Class> object_array_class(AllocClass(java_lang_Class.get(), sizeof(Class)));
260 object_array_class->SetComponentType(java_lang_Object.get());
Brian Carlstroma0808032011-07-18 00:39:23 -0700261
Brian Carlstrom5b8e4c82011-09-18 01:38:59 -0700262 // Setup the char class to be used for char[]
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700263 SirtRef<Class> char_class(AllocClass(java_lang_Class.get(), sizeof(Class)));
Brian Carlstrom5b8e4c82011-09-18 01:38:59 -0700264
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700265 // Setup the char[] class to be used for String
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700266 SirtRef<Class> char_array_class(AllocClass(java_lang_Class.get(), sizeof(Class)));
267 char_array_class->SetComponentType(char_class.get());
268 CharArray::SetArrayClass(char_array_class.get());
Brian Carlstrom9cff8e12011-08-18 16:47:29 -0700269
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700270 // Setup String
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700271 SirtRef<Class> java_lang_String(AllocClass(java_lang_Class.get(), sizeof(StringClass)));
272 String::SetClass(java_lang_String.get());
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700273 java_lang_String->SetObjectSize(sizeof(String));
274 java_lang_String->SetStatus(Class::kStatusResolved);
Jesse Wilson14150742011-07-29 19:04:44 -0400275
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700276 // Create storage for root classes, save away our work so far (requires
277 // descriptors)
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700278 class_roots_ = ObjectArray<Class>::Alloc(object_array_class.get(), kClassRootsMax);
Elliott Hughes30646832011-10-13 16:59:46 -0700279 CHECK(class_roots_ != NULL);
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700280 SetClassRoot(kJavaLangClass, java_lang_Class.get());
281 SetClassRoot(kJavaLangObject, java_lang_Object.get());
282 SetClassRoot(kClassArrayClass, class_array_class.get());
283 SetClassRoot(kObjectArrayClass, object_array_class.get());
284 SetClassRoot(kCharArrayClass, char_array_class.get());
285 SetClassRoot(kJavaLangString, java_lang_String.get());
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700286
287 // Setup the primitive type classes.
Brian Carlstrom6b4ef022011-10-23 14:59:04 -0700288 SetClassRoot(kPrimitiveBoolean, CreatePrimitiveClass("Z", Primitive::kPrimBoolean));
289 SetClassRoot(kPrimitiveByte, CreatePrimitiveClass("B", Primitive::kPrimByte));
290 SetClassRoot(kPrimitiveShort, CreatePrimitiveClass("S", Primitive::kPrimShort));
291 SetClassRoot(kPrimitiveInt, CreatePrimitiveClass("I", Primitive::kPrimInt));
292 SetClassRoot(kPrimitiveLong, CreatePrimitiveClass("J", Primitive::kPrimLong));
293 SetClassRoot(kPrimitiveFloat, CreatePrimitiveClass("F", Primitive::kPrimFloat));
294 SetClassRoot(kPrimitiveDouble, CreatePrimitiveClass("D", Primitive::kPrimDouble));
295 SetClassRoot(kPrimitiveVoid, CreatePrimitiveClass("V", Primitive::kPrimVoid));
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700296
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700297 // Create array interface entries to populate once we can load system classes
Brian Carlstrom4b620ff2011-09-11 01:11:01 -0700298 array_iftable_ = AllocObjectArray<InterfaceEntry>(2);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700299
300 // Create int array type for AllocDexCache (done in AppendToBootClassPath)
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700301 SirtRef<Class> int_array_class(AllocClass(java_lang_Class.get(), sizeof(Class)));
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700302 int_array_class->SetComponentType(GetClassRoot(kPrimitiveInt));
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700303 IntArray::SetArrayClass(int_array_class.get());
304 SetClassRoot(kIntArrayClass, int_array_class.get());
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700305
Brian Carlstrom75cb3b42011-07-28 02:13:36 -0700306 // now that these are registered, we can use AllocClass() and AllocObjectArray
Brian Carlstroma0808032011-07-18 00:39:23 -0700307
Brian Carlstrom69b15fb2011-09-03 12:25:21 -0700308 // setup boot_class_path_ and register class_path now that we can
309 // use AllocObjectArray to create DexCache instances
Brian Carlstroma004aa92012-02-08 18:05:09 -0800310 CHECK_NE(0U, boot_class_path.size());
311 for (size_t i = 0; i != boot_class_path.size(); ++i) {
312 const DexFile* dex_file = boot_class_path[i];
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -0700313 CHECK(dex_file != NULL);
314 AppendToBootClassPath(*dex_file);
Brian Carlstrom913af1b2011-07-23 21:41:13 -0700315 }
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700316
Elliott Hughes80609252011-09-23 17:24:51 -0700317 // Constructor, Field, and Method are necessary so that FindClass can link members
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700318 SirtRef<Class> java_lang_reflect_Constructor(AllocClass(java_lang_Class.get(), sizeof(MethodClass)));
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700319 CHECK(java_lang_reflect_Constructor.get() != NULL);
Elliott Hughes80609252011-09-23 17:24:51 -0700320 java_lang_reflect_Constructor->SetObjectSize(sizeof(Method));
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700321 SetClassRoot(kJavaLangReflectConstructor, java_lang_reflect_Constructor.get());
Elliott Hughes80609252011-09-23 17:24:51 -0700322 java_lang_reflect_Constructor->SetStatus(Class::kStatusResolved);
323
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700324 SirtRef<Class> java_lang_reflect_Field(AllocClass(java_lang_Class.get(), sizeof(FieldClass)));
325 CHECK(java_lang_reflect_Field.get() != NULL);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700326 java_lang_reflect_Field->SetObjectSize(sizeof(Field));
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700327 SetClassRoot(kJavaLangReflectField, java_lang_reflect_Field.get());
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700328 java_lang_reflect_Field->SetStatus(Class::kStatusResolved);
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700329 Field::SetClass(java_lang_reflect_Field.get());
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700330
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700331 SirtRef<Class> java_lang_reflect_Method(AllocClass(java_lang_Class.get(), sizeof(MethodClass)));
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700332 CHECK(java_lang_reflect_Method.get() != NULL);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700333 java_lang_reflect_Method->SetObjectSize(sizeof(Method));
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700334 SetClassRoot(kJavaLangReflectMethod, java_lang_reflect_Method.get());
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700335 java_lang_reflect_Method->SetStatus(Class::kStatusResolved);
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700336 Method::SetClasses(java_lang_reflect_Constructor.get(), java_lang_reflect_Method.get());
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700337
338 // now we can use FindSystemClass
339
Brian Carlstrom5b8e4c82011-09-18 01:38:59 -0700340 // run char class through InitializePrimitiveClass to finish init
Brian Carlstrom6b4ef022011-10-23 14:59:04 -0700341 InitializePrimitiveClass(char_class.get(), "C", Primitive::kPrimChar);
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700342 SetClassRoot(kPrimitiveChar, char_class.get()); // needs descriptor
Brian Carlstrom5b8e4c82011-09-18 01:38:59 -0700343
Brian Carlstrom4b620ff2011-09-11 01:11:01 -0700344 // Object and String need to be rerun through FindSystemClass to finish init
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700345 java_lang_Object->SetStatus(Class::kStatusNotReady);
346 Class* Object_class = FindSystemClass("Ljava/lang/Object;");
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700347 CHECK_EQ(java_lang_Object.get(), Object_class);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700348 CHECK_EQ(java_lang_Object->GetObjectSize(), sizeof(Object));
349 java_lang_String->SetStatus(Class::kStatusNotReady);
350 Class* String_class = FindSystemClass("Ljava/lang/String;");
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700351 CHECK_EQ(java_lang_String.get(), String_class);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700352 CHECK_EQ(java_lang_String->GetObjectSize(), sizeof(String));
353
Brian Carlstrom4b620ff2011-09-11 01:11:01 -0700354 // Setup the primitive array type classes - can't be done until Object has a vtable
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700355 SetClassRoot(kBooleanArrayClass, FindSystemClass("[Z"));
356 BooleanArray::SetArrayClass(GetClassRoot(kBooleanArrayClass));
357
358 SetClassRoot(kByteArrayClass, FindSystemClass("[B"));
359 ByteArray::SetArrayClass(GetClassRoot(kByteArrayClass));
360
361 Class* found_char_array_class = FindSystemClass("[C");
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700362 CHECK_EQ(char_array_class.get(), found_char_array_class);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700363
364 SetClassRoot(kShortArrayClass, FindSystemClass("[S"));
365 ShortArray::SetArrayClass(GetClassRoot(kShortArrayClass));
366
367 Class* found_int_array_class = FindSystemClass("[I");
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700368 CHECK_EQ(int_array_class.get(), found_int_array_class);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700369
370 SetClassRoot(kLongArrayClass, FindSystemClass("[J"));
371 LongArray::SetArrayClass(GetClassRoot(kLongArrayClass));
372
373 SetClassRoot(kFloatArrayClass, FindSystemClass("[F"));
374 FloatArray::SetArrayClass(GetClassRoot(kFloatArrayClass));
375
376 SetClassRoot(kDoubleArrayClass, FindSystemClass("[D"));
377 DoubleArray::SetArrayClass(GetClassRoot(kDoubleArrayClass));
378
Elliott Hughes418d20f2011-09-22 14:00:39 -0700379 Class* found_class_array_class = FindSystemClass("[Ljava/lang/Class;");
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700380 CHECK_EQ(class_array_class.get(), found_class_array_class);
Elliott Hughes418d20f2011-09-22 14:00:39 -0700381
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700382 Class* found_object_array_class = FindSystemClass("[Ljava/lang/Object;");
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700383 CHECK_EQ(object_array_class.get(), found_object_array_class);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700384
385 // Setup the single, global copies of "interfaces" and "iftable"
386 Class* java_lang_Cloneable = FindSystemClass("Ljava/lang/Cloneable;");
387 CHECK(java_lang_Cloneable != NULL);
388 Class* java_io_Serializable = FindSystemClass("Ljava/io/Serializable;");
389 CHECK(java_io_Serializable != NULL);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700390 // We assume that Cloneable/Serializable don't have superinterfaces --
391 // normally we'd have to crawl up and explicitly list all of the
Brian Carlstrom4b620ff2011-09-11 01:11:01 -0700392 // supers as well.
Ian Rogers6d4d9fc2011-11-30 16:24:48 -0800393 array_iftable_->Set(0, AllocInterfaceEntry(java_lang_Cloneable));
394 array_iftable_->Set(1, AllocInterfaceEntry(java_io_Serializable));
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700395
Elliott Hughes418d20f2011-09-22 14:00:39 -0700396 // Sanity check Class[] and Object[]'s interfaces
Ian Rogers6d4d9fc2011-11-30 16:24:48 -0800397 ClassHelper kh(class_array_class.get(), this);
398 CHECK_EQ(java_lang_Cloneable, kh.GetInterface(0));
399 CHECK_EQ(java_io_Serializable, kh.GetInterface(1));
400 kh.ChangeClass(object_array_class.get());
401 CHECK_EQ(java_lang_Cloneable, kh.GetInterface(0));
402 CHECK_EQ(java_io_Serializable, kh.GetInterface(1));
Elliott Hughes80609252011-09-23 17:24:51 -0700403 // run Class, Constructor, Field, and Method through FindSystemClass.
Brian Carlstrom74eb46a2011-08-02 20:10:14 -0700404 // this initializes their dex_cache_ fields and register them in classes_.
Brian Carlstrom9cff8e12011-08-18 16:47:29 -0700405 Class* Class_class = FindSystemClass("Ljava/lang/Class;");
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700406 CHECK_EQ(java_lang_Class.get(), Class_class);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700407
Elliott Hughes80609252011-09-23 17:24:51 -0700408 java_lang_reflect_Constructor->SetStatus(Class::kStatusNotReady);
409 Class* Constructor_class = FindSystemClass("Ljava/lang/reflect/Constructor;");
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700410 CHECK_EQ(java_lang_reflect_Constructor.get(), Constructor_class);
Elliott Hughes80609252011-09-23 17:24:51 -0700411
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700412 java_lang_reflect_Field->SetStatus(Class::kStatusNotReady);
Brian Carlstrom9cff8e12011-08-18 16:47:29 -0700413 Class* Field_class = FindSystemClass("Ljava/lang/reflect/Field;");
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700414 CHECK_EQ(java_lang_reflect_Field.get(), Field_class);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700415
416 java_lang_reflect_Method->SetStatus(Class::kStatusNotReady);
Brian Carlstrom9cff8e12011-08-18 16:47:29 -0700417 Class* Method_class = FindSystemClass("Ljava/lang/reflect/Method;");
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700418 CHECK_EQ(java_lang_reflect_Method.get(), Method_class);
Brian Carlstrom1f870082011-08-23 16:02:11 -0700419
Ian Rogers466bb252011-10-14 03:29:56 -0700420 // End of special init trickery, subsequent classes may be loaded via FindSystemClass
421
422 // Create java.lang.reflect.Proxy root
423 Class* java_lang_reflect_Proxy = FindSystemClass("Ljava/lang/reflect/Proxy;");
424 SetClassRoot(kJavaLangReflectProxy, java_lang_reflect_Proxy);
425
Brian Carlstrom1f870082011-08-23 16:02:11 -0700426 // java.lang.ref classes need to be specially flagged, but otherwise are normal classes
Elliott Hughesbf61ba32011-10-11 10:53:09 -0700427 Class* java_lang_ref_Reference = FindSystemClass("Ljava/lang/ref/Reference;");
428 SetClassRoot(kJavaLangRefReference, java_lang_ref_Reference);
Brian Carlstrom1f870082011-08-23 16:02:11 -0700429 Class* java_lang_ref_FinalizerReference = FindSystemClass("Ljava/lang/ref/FinalizerReference;");
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700430 java_lang_ref_FinalizerReference->SetAccessFlags(
431 java_lang_ref_FinalizerReference->GetAccessFlags() |
432 kAccClassIsReference | kAccClassIsFinalizerReference);
Brian Carlstrom1f870082011-08-23 16:02:11 -0700433 Class* java_lang_ref_PhantomReference = FindSystemClass("Ljava/lang/ref/PhantomReference;");
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700434 java_lang_ref_PhantomReference->SetAccessFlags(
435 java_lang_ref_PhantomReference->GetAccessFlags() |
436 kAccClassIsReference | kAccClassIsPhantomReference);
Brian Carlstrom1f870082011-08-23 16:02:11 -0700437 Class* java_lang_ref_SoftReference = FindSystemClass("Ljava/lang/ref/SoftReference;");
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700438 java_lang_ref_SoftReference->SetAccessFlags(
439 java_lang_ref_SoftReference->GetAccessFlags() | kAccClassIsReference);
Brian Carlstrom1f870082011-08-23 16:02:11 -0700440 Class* java_lang_ref_WeakReference = FindSystemClass("Ljava/lang/ref/WeakReference;");
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700441 java_lang_ref_WeakReference->SetAccessFlags(
442 java_lang_ref_WeakReference->GetAccessFlags() |
443 kAccClassIsReference | kAccClassIsWeakReference);
Brian Carlstrom1f870082011-08-23 16:02:11 -0700444
Brian Carlstromaded5f72011-10-07 17:15:04 -0700445 // Setup the ClassLoaders, verifying the object_size_
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700446 Class* java_lang_ClassLoader = FindSystemClass("Ljava/lang/ClassLoader;");
Brian Carlstromaded5f72011-10-07 17:15:04 -0700447 CHECK_EQ(java_lang_ClassLoader->GetObjectSize(), sizeof(ClassLoader));
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700448 SetClassRoot(kJavaLangClassLoader, java_lang_ClassLoader);
449
450 Class* dalvik_system_BaseDexClassLoader = FindSystemClass("Ldalvik/system/BaseDexClassLoader;");
451 CHECK_EQ(dalvik_system_BaseDexClassLoader->GetObjectSize(), sizeof(BaseDexClassLoader));
452 SetClassRoot(kDalvikSystemBaseDexClassLoader, dalvik_system_BaseDexClassLoader);
453
454 Class* dalvik_system_PathClassLoader = FindSystemClass("Ldalvik/system/PathClassLoader;");
455 CHECK_EQ(dalvik_system_PathClassLoader->GetObjectSize(), sizeof(PathClassLoader));
456 SetClassRoot(kDalvikSystemPathClassLoader, dalvik_system_PathClassLoader);
457 PathClassLoader::SetClass(dalvik_system_PathClassLoader);
458
jeffhao8cd6dda2012-02-22 10:15:34 -0800459 // Set up java.lang.Throwable, java.lang.ClassNotFoundException, and
460 // java.lang.StackTraceElement as a convenience
Ian Rogers5167c972012-02-03 10:41:20 -0800461 SetClassRoot(kJavaLangThrowable, FindSystemClass("Ljava/lang/Throwable;"));
462 Throwable::SetClass(GetClassRoot(kJavaLangThrowable));
jeffhao8cd6dda2012-02-22 10:15:34 -0800463 SetClassRoot(kJavaLangClassNotFoundException, FindSystemClass("Ljava/lang/ClassNotFoundException;"));
Brian Carlstrom1f870082011-08-23 16:02:11 -0700464 SetClassRoot(kJavaLangStackTraceElement, FindSystemClass("Ljava/lang/StackTraceElement;"));
465 SetClassRoot(kJavaLangStackTraceElementArrayClass, FindSystemClass("[Ljava/lang/StackTraceElement;"));
Shih-wei Liao55df06b2011-08-26 14:39:27 -0700466 StackTraceElement::SetClass(GetClassRoot(kJavaLangStackTraceElement));
Elliott Hughesd8ddfd52011-08-15 14:32:53 -0700467
Brian Carlstroma663ea52011-08-19 23:33:41 -0700468 FinishInit();
Brian Carlstrom0a5b14d2011-09-27 13:29:15 -0700469
Brian Carlstroma004aa92012-02-08 18:05:09 -0800470 VLOG(startup) << "ClassLinker::InitFromCompiler exiting";
Brian Carlstroma663ea52011-08-19 23:33:41 -0700471}
472
473void ClassLinker::FinishInit() {
Elliott Hughes4dd9b4d2011-12-12 18:29:24 -0800474 VLOG(startup) << "ClassLinker::FinishInit entering";
Brian Carlstrom16192862011-09-12 17:50:06 -0700475
476 // Let the heap know some key offsets into java.lang.ref instances
Elliott Hughes20cde902011-10-04 17:37:27 -0700477 // Note: we hard code the field indexes here rather than using FindInstanceField
Brian Carlstrom16192862011-09-12 17:50:06 -0700478 // as the types of the field can't be resolved prior to the runtime being
479 // fully initialized
Elliott Hughesbf61ba32011-10-11 10:53:09 -0700480 Class* java_lang_ref_Reference = GetClassRoot(kJavaLangRefReference);
Elliott Hughesadb460d2011-10-05 17:02:34 -0700481 Class* java_lang_ref_ReferenceQueue = FindSystemClass("Ljava/lang/ref/ReferenceQueue;");
Brian Carlstrom16192862011-09-12 17:50:06 -0700482 Class* java_lang_ref_FinalizerReference = FindSystemClass("Ljava/lang/ref/FinalizerReference;");
483
Elliott Hughesb3bd5f02012-03-08 21:05:27 -0800484 Heap* heap = Runtime::Current()->GetHeap();
485 heap->SetWellKnownClasses(java_lang_ref_FinalizerReference, java_lang_ref_ReferenceQueue);
Elliott Hughesadb460d2011-10-05 17:02:34 -0700486
Ian Rogers6d4d9fc2011-11-30 16:24:48 -0800487 const DexFile& java_lang_dex = FindDexFile(java_lang_ref_Reference->GetDexCache());
488
Brian Carlstrom16192862011-09-12 17:50:06 -0700489 Field* pendingNext = java_lang_ref_Reference->GetInstanceField(0);
Ian Rogers6d4d9fc2011-11-30 16:24:48 -0800490 FieldHelper fh(pendingNext, this);
491 CHECK_STREQ(fh.GetName(), "pendingNext");
492 CHECK_EQ(java_lang_dex.GetFieldId(pendingNext->GetDexFieldIndex()).type_idx_,
493 java_lang_ref_Reference->GetDexTypeIndex());
Brian Carlstrom16192862011-09-12 17:50:06 -0700494
495 Field* queue = java_lang_ref_Reference->GetInstanceField(1);
Ian Rogers6d4d9fc2011-11-30 16:24:48 -0800496 fh.ChangeField(queue);
497 CHECK_STREQ(fh.GetName(), "queue");
498 CHECK_EQ(java_lang_dex.GetFieldId(queue->GetDexFieldIndex()).type_idx_,
499 java_lang_ref_ReferenceQueue->GetDexTypeIndex());
Brian Carlstrom16192862011-09-12 17:50:06 -0700500
501 Field* queueNext = java_lang_ref_Reference->GetInstanceField(2);
Ian Rogers6d4d9fc2011-11-30 16:24:48 -0800502 fh.ChangeField(queueNext);
503 CHECK_STREQ(fh.GetName(), "queueNext");
504 CHECK_EQ(java_lang_dex.GetFieldId(queueNext->GetDexFieldIndex()).type_idx_,
505 java_lang_ref_Reference->GetDexTypeIndex());
Brian Carlstrom16192862011-09-12 17:50:06 -0700506
507 Field* referent = java_lang_ref_Reference->GetInstanceField(3);
Ian Rogers6d4d9fc2011-11-30 16:24:48 -0800508 fh.ChangeField(referent);
509 CHECK_STREQ(fh.GetName(), "referent");
510 CHECK_EQ(java_lang_dex.GetFieldId(referent->GetDexFieldIndex()).type_idx_,
511 GetClassRoot(kJavaLangObject)->GetDexTypeIndex());
Brian Carlstrom16192862011-09-12 17:50:06 -0700512
513 Field* zombie = java_lang_ref_FinalizerReference->GetInstanceField(2);
Ian Rogers6d4d9fc2011-11-30 16:24:48 -0800514 fh.ChangeField(zombie);
515 CHECK_STREQ(fh.GetName(), "zombie");
516 CHECK_EQ(java_lang_dex.GetFieldId(zombie->GetDexFieldIndex()).type_idx_,
517 GetClassRoot(kJavaLangObject)->GetDexTypeIndex());
Brian Carlstrom16192862011-09-12 17:50:06 -0700518
Elliott Hughesb3bd5f02012-03-08 21:05:27 -0800519 heap->SetReferenceOffsets(referent->GetOffset(),
Brian Carlstrom16192862011-09-12 17:50:06 -0700520 queue->GetOffset(),
521 queueNext->GetOffset(),
522 pendingNext->GetOffset(),
523 zombie->GetOffset());
524
Brian Carlstroma663ea52011-08-19 23:33:41 -0700525 // ensure all class_roots_ are initialized
Brian Carlstrom75cb3b42011-07-28 02:13:36 -0700526 for (size_t i = 0; i < kClassRootsMax; i++) {
Brian Carlstroma663ea52011-08-19 23:33:41 -0700527 ClassRoot class_root = static_cast<ClassRoot>(i);
528 Class* klass = GetClassRoot(class_root);
529 CHECK(klass != NULL);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700530 DCHECK(klass->IsArrayClass() || klass->IsPrimitive() || klass->GetDexCache() != NULL);
Brian Carlstroma663ea52011-08-19 23:33:41 -0700531 // note SetClassRoot does additional validation.
532 // if possible add new checks there to catch errors early
Brian Carlstrom75cb3b42011-07-28 02:13:36 -0700533 }
534
Elliott Hughes92f14b22011-10-06 12:29:54 -0700535 CHECK(array_iftable_ != NULL);
Elliott Hughes92f14b22011-10-06 12:29:54 -0700536
Brian Carlstrom75cb3b42011-07-28 02:13:36 -0700537 // disable the slow paths in FindClass and CreatePrimitiveClass now
538 // that Object, Class, and Object[] are setup
539 init_done_ = true;
Brian Carlstrom0a5b14d2011-09-27 13:29:15 -0700540
Elliott Hughes4dd9b4d2011-12-12 18:29:24 -0800541 VLOG(startup) << "ClassLinker::FinishInit exiting";
Brian Carlstrom75cb3b42011-07-28 02:13:36 -0700542}
543
Elliott Hughes2a20cfd2011-09-23 19:30:41 -0700544void ClassLinker::RunRootClinits() {
545 Thread* self = Thread::Current();
546 for (size_t i = 0; i < ClassLinker::kClassRootsMax; ++i) {
547 Class* c = GetClassRoot(ClassRoot(i));
548 if (!c->IsArrayClass() && !c->IsPrimitive()) {
549 EnsureInitialized(GetClassRoot(ClassRoot(i)), true);
Elliott Hughesd9cdfe92011-10-06 16:09:04 -0700550 CHECK(!self->IsExceptionPending()) << PrettyTypeOf(self->GetException());
Elliott Hughes2a20cfd2011-09-23 19:30:41 -0700551 }
552 }
553}
554
Brian Carlstromd601af82012-01-06 10:15:19 -0800555bool ClassLinker::GenerateOatFile(const std::string& dex_filename,
556 int oat_fd,
557 const std::string& oat_cache_filename) {
Brian Carlstroma56fcd62012-02-04 21:23:01 -0800558 std::string dex2oat_string(GetAndroidRoot());
559 dex2oat_string += "/bin/dex2oat";
Brian Carlstrom29e7ac72011-12-05 23:42:57 -0800560#ifndef NDEBUG
561 dex2oat_string += 'd';
562#endif
563 const char* dex2oat = dex2oat_string.c_str();
564
Brian Carlstroma004aa92012-02-08 18:05:09 -0800565 const char* class_path = Runtime::Current()->GetClassPathString().c_str();
Brian Carlstrom29e7ac72011-12-05 23:42:57 -0800566
Elliott Hughesb3bd5f02012-03-08 21:05:27 -0800567 Heap* heap = Runtime::Current()->GetHeap();
Brian Carlstrom29e7ac72011-12-05 23:42:57 -0800568 std::string boot_image_option_string("--boot-image=");
Brian Carlstromfddf6f62012-03-15 16:56:45 -0700569 boot_image_option_string += heap->GetImageSpace()->GetImageFilename();
Brian Carlstrom29e7ac72011-12-05 23:42:57 -0800570 const char* boot_image_option = boot_image_option_string.c_str();
571
572 std::string dex_file_option_string("--dex-file=");
Brian Carlstromd601af82012-01-06 10:15:19 -0800573 dex_file_option_string += dex_filename;
Brian Carlstrom29e7ac72011-12-05 23:42:57 -0800574 const char* dex_file_option = dex_file_option_string.c_str();
575
Brian Carlstromd601af82012-01-06 10:15:19 -0800576 std::string oat_fd_option_string("--oat-fd=");
Brian Carlstrom866c8622012-01-06 16:35:13 -0800577 StringAppendF(&oat_fd_option_string, "%d", oat_fd);
Brian Carlstromd601af82012-01-06 10:15:19 -0800578 const char* oat_fd_option = oat_fd_option_string.c_str();
579
Brian Carlstroma004aa92012-02-08 18:05:09 -0800580 std::string oat_location_option_string("--oat-location=");
581 oat_location_option_string += oat_cache_filename;
582 const char* oat_location_option = oat_location_option_string.c_str();
Brian Carlstrom29e7ac72011-12-05 23:42:57 -0800583
jeffhao262bf462011-10-20 18:36:32 -0700584 // fork and exec dex2oat
585 pid_t pid = fork();
586 if (pid == 0) {
Brian Carlstrom29e7ac72011-12-05 23:42:57 -0800587 // no allocation allowed between fork and exec
Ian Rogers725aee52012-01-11 11:56:56 -0800588
589 // change process groups, so we don't get reaped by ProcessManager
590 setpgid(0, 0);
591
jeffhao10037c82012-01-23 15:06:23 -0800592 VLOG(class_linker) << dex2oat
593 << " --runtime-arg -Xms64m"
594 << " --runtime-arg -Xmx64m"
595 << " --runtime-arg -classpath"
596 << " --runtime-arg " << class_path
597 << " " << boot_image_option
598 << " " << dex_file_option
599 << " " << oat_fd_option
Brian Carlstroma004aa92012-02-08 18:05:09 -0800600 << " " << oat_location_option;
jeffhao10037c82012-01-23 15:06:23 -0800601
Brian Carlstrom29e7ac72011-12-05 23:42:57 -0800602 execl(dex2oat, dex2oat,
jeffhao5d840402011-10-24 17:09:45 -0700603 "--runtime-arg", "-Xms64m",
604 "--runtime-arg", "-Xmx64m",
Jesse Wilson254db0f2011-11-16 16:44:11 -0500605 "--runtime-arg", "-classpath",
Brian Carlstrom29e7ac72011-12-05 23:42:57 -0800606 "--runtime-arg", class_path,
607 boot_image_option,
608 dex_file_option,
Brian Carlstromd601af82012-01-06 10:15:19 -0800609 oat_fd_option,
Brian Carlstroma004aa92012-02-08 18:05:09 -0800610 oat_location_option,
jeffhao262bf462011-10-20 18:36:32 -0700611 NULL);
612
Brian Carlstrom29e7ac72011-12-05 23:42:57 -0800613 PLOG(FATAL) << "execl(" << dex2oat << ") failed";
Brian Carlstromd601af82012-01-06 10:15:19 -0800614 return false;
jeffhao262bf462011-10-20 18:36:32 -0700615 } else {
616 // wait for dex2oat to finish
617 int status;
618 pid_t got_pid = TEMP_FAILURE_RETRY(waitpid(pid, &status, 0));
619 if (got_pid != pid) {
620 PLOG(ERROR) << "waitpid failed: wanted " << pid << ", got " << got_pid;
Brian Carlstromd601af82012-01-06 10:15:19 -0800621 return false;
jeffhao262bf462011-10-20 18:36:32 -0700622 }
623 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) {
Brian Carlstromd601af82012-01-06 10:15:19 -0800624 LOG(ERROR) << dex2oat << " failed with dex-file=" << dex_filename;
625 return false;
jeffhao262bf462011-10-20 18:36:32 -0700626 }
627 }
Brian Carlstromd601af82012-01-06 10:15:19 -0800628 return true;
jeffhao262bf462011-10-20 18:36:32 -0700629}
630
Brian Carlstrom866c8622012-01-06 16:35:13 -0800631void ClassLinker::RegisterOatFile(const OatFile& oat_file) {
632 MutexLock mu(dex_lock_);
633 RegisterOatFileLocked(oat_file);
634}
635
636void ClassLinker::RegisterOatFileLocked(const OatFile& oat_file) {
637 dex_lock_.AssertHeld();
638 oat_files_.push_back(&oat_file);
639}
640
Ian Rogers30fab402012-01-23 15:43:46 -0800641OatFile* ClassLinker::OpenOat(const ImageSpace* space) {
Brian Carlstrom47d237a2011-10-18 15:08:33 -0700642 MutexLock mu(dex_lock_);
Brian Carlstrom58ae9412011-10-04 00:56:06 -0700643 const Runtime* runtime = Runtime::Current();
Brian Carlstrom58ae9412011-10-04 00:56:06 -0700644 const ImageHeader& image_header = space->GetImageHeader();
Ian Rogers6d4d9fc2011-11-30 16:24:48 -0800645 // Grab location but don't use Object::AsString as we haven't yet initialized the roots to
646 // check the down cast
647 String* oat_location = down_cast<String*>(image_header.GetImageRoot(ImageHeader::kOatLocation));
Brian Carlstrom58ae9412011-10-04 00:56:06 -0700648 std::string oat_filename;
649 oat_filename += runtime->GetHostPrefix();
650 oat_filename += oat_location->ToModifiedUtf8();
Brian Carlstroma004aa92012-02-08 18:05:09 -0800651 OatFile* oat_file = OatFile::Open(oat_filename, oat_filename, image_header.GetOatBegin());
Ian Rogers30fab402012-01-23 15:43:46 -0800652 VLOG(startup) << "ClassLinker::OpenOat entering oat_filename=" << oat_filename;
Brian Carlstrom58ae9412011-10-04 00:56:06 -0700653 if (oat_file == NULL) {
Brian Carlstroma9f19782011-10-13 00:14:47 -0700654 LOG(ERROR) << "Failed to open oat file " << oat_filename << " referenced from image.";
Brian Carlstrom58ae9412011-10-04 00:56:06 -0700655 return NULL;
656 }
657 uint32_t oat_checksum = oat_file->GetOatHeader().GetChecksum();
658 uint32_t image_oat_checksum = image_header.GetOatChecksum();
659 if (oat_checksum != image_oat_checksum) {
Brian Carlstrom866c8622012-01-06 16:35:13 -0800660 LOG(ERROR) << "Failed to match oat file checksum " << std::hex << oat_checksum
Brian Carlstrom58ae9412011-10-04 00:56:06 -0700661 << " to expected oat checksum " << std::hex << oat_checksum
662 << " in image";
663 return NULL;
664 }
Brian Carlstrom866c8622012-01-06 16:35:13 -0800665 RegisterOatFileLocked(*oat_file);
Elliott Hughes4dd9b4d2011-12-12 18:29:24 -0800666 VLOG(startup) << "ClassLinker::OpenOat exiting";
Brian Carlstrom58ae9412011-10-04 00:56:06 -0700667 return oat_file;
668}
669
Brian Carlstromae826982011-11-09 01:33:42 -0800670const OatFile* ClassLinker::FindOpenedOatFileForDexFile(const DexFile& dex_file) {
Brian Carlstroma004aa92012-02-08 18:05:09 -0800671 return FindOpenedOatFileFromDexLocation(dex_file.GetLocation());
Brian Carlstrom5b332c82012-02-01 15:02:31 -0800672}
673
Brian Carlstroma004aa92012-02-08 18:05:09 -0800674const OatFile* ClassLinker::FindOpenedOatFileFromDexLocation(const std::string& dex_location) {
Brian Carlstromae826982011-11-09 01:33:42 -0800675 for (size_t i = 0; i < oat_files_.size(); i++) {
676 const OatFile* oat_file = oat_files_[i];
677 DCHECK(oat_file != NULL);
Brian Carlstrom5b332c82012-02-01 15:02:31 -0800678 const OatFile::OatDexFile* oat_dex_file = oat_file->GetOatDexFile(dex_location, false);
Brian Carlstroma004aa92012-02-08 18:05:09 -0800679 if (oat_dex_file != NULL) {
Brian Carlstromae826982011-11-09 01:33:42 -0800680 return oat_file;
681 }
682 }
683 return NULL;
684}
685
Brian Carlstromd601af82012-01-06 10:15:19 -0800686class LockedFd {
687 public:
688 static LockedFd* CreateAndLock(std::string& name, mode_t mode) {
689 int fd = open(name.c_str(), O_CREAT | O_RDWR, mode);
690 if (fd == -1) {
691 PLOG(ERROR) << "Failed to open file '" << name << "'";
692 return NULL;
693 }
694 fchmod(fd, mode);
695
696 LOG(INFO) << "locking file " << name << " (fd=" << fd << ")";
697 // try to lock non-blocking so we can log if we need may need to block
698 int result = flock(fd, LOCK_EX | LOCK_NB);
699 if (result == -1) {
700 LOG(WARNING) << "sleeping while locking file " << name;
701 // retry blocking
702 result = flock(fd, LOCK_EX);
703 }
704 if (result == -1) {
705 PLOG(ERROR) << "Failed to lock file '" << name << "'";
706 close(fd);
707 return NULL;
708 }
709 return new LockedFd(fd);
710 }
711
712 int GetFd() const {
713 return fd_;
714 }
715
716 ~LockedFd() {
717 if (fd_ != -1) {
718 int result = flock(fd_, LOCK_UN);
719 if (result == -1) {
720 PLOG(WARNING) << "flock(" << fd_ << ", LOCK_UN) failed";
721 }
722 close(fd_);
723 }
724 }
725
726 private:
727 explicit LockedFd(int fd) : fd_(fd) {}
728
729 int fd_;
730};
731
Brian Carlstrom5b332c82012-02-01 15:02:31 -0800732static const DexFile* FindDexFileInOatLocation(const std::string& dex_location,
733 uint32_t dex_location_checksum,
734 const std::string& oat_location) {
Brian Carlstroma004aa92012-02-08 18:05:09 -0800735 UniquePtr<OatFile> oat_file(OatFile::Open(oat_location, oat_location, NULL));
Brian Carlstrom5b332c82012-02-01 15:02:31 -0800736 if (oat_file.get() == NULL) {
737 return NULL;
738 }
Brian Carlstrom81f3ca12012-03-17 00:27:35 -0700739 Runtime* runtime = Runtime::Current();
740 const ImageHeader& image_header = runtime->GetHeap()->GetImageSpace()->GetImageHeader();
741 if (oat_file->GetOatHeader().GetImageFileLocationChecksum() != image_header.GetOatChecksum()) {
742 return NULL;
743 }
Brian Carlstrom5b332c82012-02-01 15:02:31 -0800744 const OatFile::OatDexFile* oat_dex_file = oat_file->GetOatDexFile(dex_location);
745 if (oat_dex_file == NULL) {
746 return NULL;
747 }
748 if (oat_dex_file->GetDexFileLocationChecksum() != dex_location_checksum) {
749 return NULL;
750 }
Brian Carlstrom81f3ca12012-03-17 00:27:35 -0700751 runtime->GetClassLinker()->RegisterOatFile(*oat_file.release());
Brian Carlstrom5b332c82012-02-01 15:02:31 -0800752 return oat_dex_file->OpenDexFile();
753}
754
755const DexFile* ClassLinker::FindOrCreateOatFileForDexLocation(const std::string& dex_location,
756 const std::string& oat_location) {
757 uint32_t dex_location_checksum;
758 if (!DexFile::GetChecksum(dex_location, dex_location_checksum)) {
759 LOG(ERROR) << "Failed to compute checksum '" << dex_location << "'";
760 return NULL;
761 }
762
763 // Check if we already have an up-to-date output file
764 const DexFile* dex_file = FindDexFileInOatLocation(dex_location,
765 dex_location_checksum,
766 oat_location);
767 if (dex_file != NULL) {
768 return dex_file;
769 }
770
771 // Generate the output oat file for the dex file
772 ClassLinker* class_linker = Runtime::Current()->GetClassLinker();
773 UniquePtr<File> file(OS::OpenFile(oat_location.c_str(), true));
774 if (file.get() == NULL) {
775 LOG(ERROR) << "Failed to create oat file: " << oat_location;
776 return NULL;
777 }
778 if (!class_linker->GenerateOatFile(dex_location, file->Fd(), oat_location)) {
779 LOG(ERROR) << "Failed to generate oat file: " << oat_location;
780 return NULL;
781 }
782 // Open the oat from file descriptor we passed to GenerateOatFile
783 if (lseek(file->Fd(), 0, SEEK_SET) != 0) {
784 LOG(ERROR) << "Failed to seek to start of generated oat file: " << oat_location;
785 return NULL;
786 }
787 const OatFile* oat_file = OatFile::Open(*file.get(), oat_location, NULL);
788 if (oat_file == NULL) {
789 LOG(ERROR) << "Failed to open generated oat file: " << oat_location;
790 return NULL;
791 }
792 class_linker->RegisterOatFile(*oat_file);
793 const OatFile::OatDexFile* oat_dex_file = oat_file->GetOatDexFile(dex_location);
794 if (oat_dex_file == NULL) {
795 LOG(ERROR) << "Failed to find dex file in generated oat file: " << oat_location;
796 return NULL;
797 }
798 return oat_dex_file->OpenDexFile();
799}
800
801const DexFile* ClassLinker::FindDexFileInOatFileFromDexLocation(const std::string& dex_location) {
Brian Carlstrom47d237a2011-10-18 15:08:33 -0700802 MutexLock mu(dex_lock_);
Brian Carlstrom5b332c82012-02-01 15:02:31 -0800803
Brian Carlstroma004aa92012-02-08 18:05:09 -0800804 const OatFile* open_oat_file = FindOpenedOatFileFromDexLocation(dex_location);
Brian Carlstrom866c8622012-01-06 16:35:13 -0800805 if (open_oat_file != NULL) {
Brian Carlstrom5b332c82012-02-01 15:02:31 -0800806 return open_oat_file->GetOatDexFile(dex_location)->OpenDexFile();
Brian Carlstromae826982011-11-09 01:33:42 -0800807 }
808
Brian Carlstroma004aa92012-02-08 18:05:09 -0800809 // Look for an existing file next to dex, assuming its up-to-date if found
Brian Carlstrom5b332c82012-02-01 15:02:31 -0800810 std::string oat_filename(OatFile::DexFilenameToOatFilename(dex_location));
Brian Carlstroma004aa92012-02-08 18:05:09 -0800811 const OatFile* oat_file = FindOatFileFromOatLocation(oat_filename);
Brian Carlstrom5b332c82012-02-01 15:02:31 -0800812 if (oat_file != NULL) {
813 const OatFile::OatDexFile* oat_dex_file = oat_file->GetOatDexFile(dex_location);
Brian Carlstroma004aa92012-02-08 18:05:09 -0800814 CHECK(oat_dex_file != NULL) << oat_filename << " " << dex_location;
815 return oat_dex_file->OpenDexFile();
816 }
817 // Look for an existing file in the art-cache, validating the result if found
818 // not found in /foo/bar/baz.oat? try /data/art-cache/foo@bar@baz.oat
819 std::string cache_location(GetArtCacheFilenameOrDie(oat_filename));
820 oat_file = FindOatFileFromOatLocation(cache_location);
821 if (oat_file != NULL) {
822 uint32_t dex_location_checksum;
823 if (!DexFile::GetChecksum(dex_location, dex_location_checksum)) {
824 LOG(WARNING) << "Failed to compute checksum: " << dex_location;
825 return NULL;
826 }
Brian Carlstrom81f3ca12012-03-17 00:27:35 -0700827
828 Runtime* runtime = Runtime::Current();
829 const ImageHeader& image_header = runtime->GetHeap()->GetImageSpace()->GetImageHeader();
830 uint32_t image_checksum = image_header.GetOatChecksum();
831 bool image_check = (oat_file->GetOatHeader().GetImageFileLocationChecksum() == image_checksum);
832
Brian Carlstroma004aa92012-02-08 18:05:09 -0800833 const OatFile::OatDexFile* oat_dex_file = oat_file->GetOatDexFile(dex_location);
834 CHECK(oat_dex_file != NULL) << oat_filename << " " << dex_location;
Brian Carlstrom81f3ca12012-03-17 00:27:35 -0700835 bool dex_check = (dex_location_checksum == oat_dex_file->GetDexFileLocationChecksum());
836
837 if (image_check && dex_check) {
Brian Carlstrom5b332c82012-02-01 15:02:31 -0800838 return oat_file->GetOatDexFile(dex_location)->OpenDexFile();
Elliott Hughesed6d78e2011-10-25 17:35:14 -0700839 }
Brian Carlstrom81f3ca12012-03-17 00:27:35 -0700840 if (image_check) {
841 std::string image_file(image_header.GetImageRoot(
842 ImageHeader::kOatLocation)->AsString()->ToModifiedUtf8());
843 LOG(WARNING) << ".oat file " << oat_file->GetLocation()
844 << " checksum ( " << std::hex << oat_dex_file->GetDexFileLocationChecksum()
845 << ") mismatch with " << image_file
846 << " (" << std::hex << image_checksum << ")--- regenerating";
847 }
848 if (dex_check) {
849 LOG(WARNING) << ".oat file " << oat_file->GetLocation()
850 << " checksum ( " << std::hex << oat_dex_file->GetDexFileLocationChecksum()
851 << ") mismatch with " << dex_location
852 << " (" << std::hex << dex_location_checksum << ")--- regenerating";
853 }
Brian Carlstrom5b332c82012-02-01 15:02:31 -0800854 if (TEMP_FAILURE_RETRY(unlink(oat_file->GetLocation().c_str())) != 0) {
855 PLOG(FATAL) << "Couldn't remove obsolete .oat file " << oat_file->GetLocation();
Brian Carlstromd601af82012-01-06 10:15:19 -0800856 }
jeffhao262bf462011-10-20 18:36:32 -0700857 }
Brian Carlstroma004aa92012-02-08 18:05:09 -0800858 LOG(INFO) << "Failed to open oat file from " << oat_filename << " or " << cache_location << ".";
859
Brian Carlstrom5b332c82012-02-01 15:02:31 -0800860 // Try to generate oat file if it wasn't found or was obsolete.
861 std::string oat_cache_filename(GetArtCacheFilenameOrDie(oat_filename));
862 return FindOrCreateOatFileForDexLocation(dex_location, oat_cache_filename);
Brian Carlstromaded5f72011-10-07 17:15:04 -0700863}
864
Brian Carlstromae826982011-11-09 01:33:42 -0800865const OatFile* ClassLinker::FindOpenedOatFileFromOatLocation(const std::string& oat_location) {
Brian Carlstromaded5f72011-10-07 17:15:04 -0700866 for (size_t i = 0; i < oat_files_.size(); i++) {
867 const OatFile* oat_file = oat_files_[i];
868 DCHECK(oat_file != NULL);
Brian Carlstromae826982011-11-09 01:33:42 -0800869 if (oat_file->GetLocation() == oat_location) {
Brian Carlstromaded5f72011-10-07 17:15:04 -0700870 return oat_file;
871 }
872 }
Brian Carlstromfad71432011-10-16 20:25:10 -0700873 return NULL;
874}
Brian Carlstromaded5f72011-10-07 17:15:04 -0700875
Brian Carlstromae826982011-11-09 01:33:42 -0800876const OatFile* ClassLinker::FindOatFileFromOatLocation(const std::string& oat_location) {
jeffhaof6174e82012-01-31 16:14:17 -0800877 MutexLock mu(dex_lock_);
878 const OatFile* oat_file = FindOpenedOatFileFromOatLocation(oat_location);
879 if (oat_file != NULL) {
880 return oat_file;
881 }
882
Brian Carlstroma004aa92012-02-08 18:05:09 -0800883 oat_file = OatFile::Open(oat_location, oat_location, NULL);
Brian Carlstromaded5f72011-10-07 17:15:04 -0700884 if (oat_file == NULL) {
Brian Carlstroma004aa92012-02-08 18:05:09 -0800885 return NULL;
Brian Carlstromaded5f72011-10-07 17:15:04 -0700886 }
Brian Carlstromae826982011-11-09 01:33:42 -0800887 CHECK(oat_file != NULL) << oat_location;
jeffhaof6174e82012-01-31 16:14:17 -0800888 RegisterOatFileLocked(*oat_file);
Brian Carlstromaded5f72011-10-07 17:15:04 -0700889 return oat_file;
890}
891
Brian Carlstrom58ae9412011-10-04 00:56:06 -0700892void ClassLinker::InitFromImage() {
Elliott Hughes4dd9b4d2011-12-12 18:29:24 -0800893 VLOG(startup) << "ClassLinker::InitFromImage entering";
Brian Carlstroma663ea52011-08-19 23:33:41 -0700894 CHECK(!init_done_);
895
Elliott Hughesb3bd5f02012-03-08 21:05:27 -0800896 Heap* heap = Runtime::Current()->GetHeap();
Brian Carlstromfddf6f62012-03-15 16:56:45 -0700897 ImageSpace* space = heap->GetImageSpace();
898 OatFile* oat_file = OpenOat(space);
899 CHECK(oat_file != NULL) << "Failed to open oat file for image";
Brian Carlstrom81f3ca12012-03-17 00:27:35 -0700900 CHECK_EQ(oat_file->GetOatHeader().GetImageFileLocationChecksum(), 0U);
901 CHECK(oat_file->GetOatHeader().GetImageFileLocation() == "");
Brian Carlstromfddf6f62012-03-15 16:56:45 -0700902 Object* dex_caches_object = space->GetImageHeader().GetImageRoot(ImageHeader::kDexCaches);
903 ObjectArray<DexCache>* dex_caches = dex_caches_object->AsObjectArray<DexCache>();
Brian Carlstrom58ae9412011-10-04 00:56:06 -0700904
Brian Carlstromfddf6f62012-03-15 16:56:45 -0700905 // Special case of setting up the String class early so that we can test arbitrary objects
906 // as being Strings or not
907 Class* java_lang_String = space->GetImageHeader().GetImageRoot(ImageHeader::kClassRoots)
908 ->AsObjectArray<Class>()->Get(kJavaLangString);
909 String::SetClass(java_lang_String);
Ian Rogers6d4d9fc2011-11-30 16:24:48 -0800910
Brian Carlstromfddf6f62012-03-15 16:56:45 -0700911 CHECK_EQ(oat_file->GetOatHeader().GetDexFileCount(),
912 static_cast<uint32_t>(dex_caches->GetLength()));
913 for (int i = 0; i < dex_caches->GetLength(); i++) {
914 SirtRef<DexCache> dex_cache(dex_caches->Get(i));
915 const std::string& dex_file_location(dex_cache->GetLocation()->ToModifiedUtf8());
916 const OatFile::OatDexFile* oat_dex_file = oat_file->GetOatDexFile(dex_file_location);
917 const DexFile* dex_file = oat_dex_file->OpenDexFile();
918 if (dex_file == NULL) {
919 LOG(FATAL) << "Failed to open dex file " << dex_file_location
920 << " from within oat file " << oat_file->GetLocation();
Brian Carlstrom58ae9412011-10-04 00:56:06 -0700921 }
Brian Carlstromfddf6f62012-03-15 16:56:45 -0700922
923 CHECK_EQ(dex_file->GetLocationChecksum(), oat_dex_file->GetDexFileLocationChecksum());
924
925 AppendToBootClassPath(*dex_file, dex_cache);
Brian Carlstrom58ae9412011-10-04 00:56:06 -0700926 }
927
Elliott Hughesb3bd5f02012-03-08 21:05:27 -0800928 HeapBitmap* heap_bitmap = heap->GetLiveBits();
Brian Carlstroma663ea52011-08-19 23:33:41 -0700929 DCHECK(heap_bitmap != NULL);
930
Brian Carlstroma663ea52011-08-19 23:33:41 -0700931 // reinit clases_ table
Brian Carlstrom34f426c2011-10-04 12:58:02 -0700932 heap_bitmap->Walk(InitFromImageCallback, this);
Brian Carlstroma663ea52011-08-19 23:33:41 -0700933
934 // reinit class_roots_
Ian Rogers30fab402012-01-23 15:43:46 -0800935 Object* class_roots_object =
Brian Carlstromfddf6f62012-03-15 16:56:45 -0700936 heap->GetImageSpace()->GetImageHeader().GetImageRoot(ImageHeader::kClassRoots);
Brian Carlstrom34f426c2011-10-04 12:58:02 -0700937 class_roots_ = class_roots_object->AsObjectArray<Class>();
Brian Carlstroma663ea52011-08-19 23:33:41 -0700938
Ian Rogers6d4d9fc2011-11-30 16:24:48 -0800939 // reinit array_iftable_ from any array class instance, they should be ==
Elliott Hughes92f14b22011-10-06 12:29:54 -0700940 array_iftable_ = GetClassRoot(kObjectArrayClass)->GetIfTable();
941 DCHECK(array_iftable_ == GetClassRoot(kBooleanArrayClass)->GetIfTable());
Ian Rogers6d4d9fc2011-11-30 16:24:48 -0800942 // String class root was set above
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700943 Field::SetClass(GetClassRoot(kJavaLangReflectField));
Elliott Hughes80609252011-09-23 17:24:51 -0700944 Method::SetClasses(GetClassRoot(kJavaLangReflectConstructor), GetClassRoot(kJavaLangReflectMethod));
Brian Carlstroma663ea52011-08-19 23:33:41 -0700945 BooleanArray::SetArrayClass(GetClassRoot(kBooleanArrayClass));
946 ByteArray::SetArrayClass(GetClassRoot(kByteArrayClass));
947 CharArray::SetArrayClass(GetClassRoot(kCharArrayClass));
948 DoubleArray::SetArrayClass(GetClassRoot(kDoubleArrayClass));
949 FloatArray::SetArrayClass(GetClassRoot(kFloatArrayClass));
950 IntArray::SetArrayClass(GetClassRoot(kIntArrayClass));
951 LongArray::SetArrayClass(GetClassRoot(kLongArrayClass));
952 ShortArray::SetArrayClass(GetClassRoot(kShortArrayClass));
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -0700953 PathClassLoader::SetClass(GetClassRoot(kDalvikSystemPathClassLoader));
Ian Rogers5167c972012-02-03 10:41:20 -0800954 Throwable::SetClass(GetClassRoot(kJavaLangThrowable));
Shih-wei Liao55df06b2011-08-26 14:39:27 -0700955 StackTraceElement::SetClass(GetClassRoot(kJavaLangStackTraceElement));
Brian Carlstroma663ea52011-08-19 23:33:41 -0700956
957 FinishInit();
Brian Carlstrom0a5b14d2011-09-27 13:29:15 -0700958
Elliott Hughes4dd9b4d2011-12-12 18:29:24 -0800959 VLOG(startup) << "ClassLinker::InitFromImage exiting";
Brian Carlstroma663ea52011-08-19 23:33:41 -0700960}
961
Brian Carlstrom78128a62011-09-15 17:21:19 -0700962void ClassLinker::InitFromImageCallback(Object* obj, void* arg) {
Brian Carlstroma663ea52011-08-19 23:33:41 -0700963 DCHECK(obj != NULL);
964 DCHECK(arg != NULL);
Brian Carlstrom34f426c2011-10-04 12:58:02 -0700965 ClassLinker* class_linker = reinterpret_cast<ClassLinker*>(arg);
Brian Carlstroma663ea52011-08-19 23:33:41 -0700966
Elliott Hughesdbb40792011-11-18 17:05:22 -0800967 if (obj->GetClass()->IsStringClass()) {
Brian Carlstrom34f426c2011-10-04 12:58:02 -0700968 class_linker->intern_table_->RegisterStrong(obj->AsString());
Brian Carlstromc74255f2011-09-11 22:47:39 -0700969 return;
970 }
Brian Carlstromaded5f72011-10-07 17:15:04 -0700971 if (obj->IsClass()) {
972 // restore class to ClassLinker::classes_ table
973 Class* klass = obj->AsClass();
Elliott Hughesc3b77c72011-12-15 20:56:48 -0800974 ClassHelper kh(klass, class_linker);
Brian Carlstrom07bb8552012-01-18 22:10:50 -0800975 Class* existing = class_linker->InsertClass(kh.GetDescriptor(), klass, true);
976 DCHECK(existing == NULL) << kh.GetDescriptor();
Brian Carlstroma663ea52011-08-19 23:33:41 -0700977 return;
978 }
Brian Carlstroma663ea52011-08-19 23:33:41 -0700979}
980
981// Keep in sync with InitCallback. Anything we visit, we need to
982// reinit references to when reinitializing a ClassLinker from a
983// mapped image.
Elliott Hughes410c0c82011-09-01 17:58:25 -0700984void ClassLinker::VisitRoots(Heap::RootVisitor* visitor, void* arg) const {
985 visitor(class_roots_, arg);
Brian Carlstrom75cb3b42011-07-28 02:13:36 -0700986
987 for (size_t i = 0; i < dex_caches_.size(); i++) {
Elliott Hughes410c0c82011-09-01 17:58:25 -0700988 visitor(dex_caches_[i], arg);
Brian Carlstrom75cb3b42011-07-28 02:13:36 -0700989 }
990
Brian Carlstrom7e93b502011-08-04 14:16:22 -0700991 {
Brian Carlstrom47d237a2011-10-18 15:08:33 -0700992 MutexLock mu(classes_lock_);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700993 typedef Table::const_iterator It; // TODO: C++0x auto
Brian Carlstrom7e93b502011-08-04 14:16:22 -0700994 for (It it = classes_.begin(), end = classes_.end(); it != end; ++it) {
Elliott Hughes410c0c82011-09-01 17:58:25 -0700995 visitor(it->second, arg);
Brian Carlstrom7e93b502011-08-04 14:16:22 -0700996 }
Ian Rogers5d76c432011-10-31 21:42:49 -0700997 // Note. we deliberately ignore the class roots in the image (held in image_classes_)
Brian Carlstrom75cb3b42011-07-28 02:13:36 -0700998 }
Brian Carlstrom7e93b502011-08-04 14:16:22 -0700999
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001000 visitor(array_iftable_, arg);
Brian Carlstrom578bbdc2011-07-21 14:07:47 -07001001}
1002
Elliott Hughesa2155262011-11-16 16:26:58 -08001003void ClassLinker::VisitClasses(ClassVisitor* visitor, void* arg) const {
1004 MutexLock mu(classes_lock_);
1005 typedef Table::const_iterator It; // TODO: C++0x auto
1006 for (It it = classes_.begin(), end = classes_.end(); it != end; ++it) {
1007 if (!visitor(it->second, arg)) {
1008 return;
1009 }
1010 }
1011 for (It it = image_classes_.begin(), end = image_classes_.end(); it != end; ++it) {
1012 if (!visitor(it->second, arg)) {
1013 return;
1014 }
1015 }
1016}
1017
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07001018ClassLinker::~ClassLinker() {
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07001019 String::ResetClass();
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07001020 Field::ResetClass();
Elliott Hughes80609252011-09-23 17:24:51 -07001021 Method::ResetClasses();
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07001022 BooleanArray::ResetArrayClass();
1023 ByteArray::ResetArrayClass();
1024 CharArray::ResetArrayClass();
1025 DoubleArray::ResetArrayClass();
1026 FloatArray::ResetArrayClass();
1027 IntArray::ResetArrayClass();
1028 LongArray::ResetArrayClass();
1029 ShortArray::ResetArrayClass();
1030 PathClassLoader::ResetClass();
Ian Rogers5167c972012-02-03 10:41:20 -08001031 Throwable::ResetClass();
Shih-wei Liao55df06b2011-08-26 14:39:27 -07001032 StackTraceElement::ResetClass();
Brian Carlstrom58ae9412011-10-04 00:56:06 -07001033 STLDeleteElements(&boot_class_path_);
1034 STLDeleteElements(&oat_files_);
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07001035}
1036
1037DexCache* ClassLinker::AllocDexCache(const DexFile& dex_file) {
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001038 SirtRef<DexCache> dex_cache(down_cast<DexCache*>(AllocObjectArray<Object>(DexCache::LengthAsArray())));
1039 if (dex_cache.get() == NULL) {
Elliott Hughes30646832011-10-13 16:59:46 -07001040 return NULL;
1041 }
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001042 SirtRef<String> location(intern_table_->InternStrong(dex_file.GetLocation().c_str()));
1043 if (location.get() == NULL) {
Elliott Hughes30646832011-10-13 16:59:46 -07001044 return NULL;
1045 }
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001046 SirtRef<ObjectArray<String> > strings(AllocObjectArray<String>(dex_file.NumStringIds()));
1047 if (strings.get() == NULL) {
1048 return NULL;
1049 }
1050 SirtRef<ObjectArray<Class> > types(AllocClassArray(dex_file.NumTypeIds()));
1051 if (types.get() == NULL) {
1052 return NULL;
1053 }
1054 SirtRef<ObjectArray<Method> > methods(AllocObjectArray<Method>(dex_file.NumMethodIds()));
1055 if (methods.get() == NULL) {
1056 return NULL;
1057 }
1058 SirtRef<ObjectArray<Field> > fields(AllocObjectArray<Field>(dex_file.NumFieldIds()));
1059 if (fields.get() == NULL) {
1060 return NULL;
1061 }
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001062 SirtRef<ObjectArray<StaticStorageBase> > initialized_static_storage(AllocObjectArray<StaticStorageBase>(dex_file.NumTypeIds()));
1063 if (initialized_static_storage.get() == NULL) {
1064 return NULL;
1065 }
1066
1067 dex_cache->Init(location.get(),
1068 strings.get(),
1069 types.get(),
1070 methods.get(),
1071 fields.get(),
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001072 initialized_static_storage.get());
1073 return dex_cache.get();
Brian Carlstroma0808032011-07-18 00:39:23 -07001074}
1075
Brian Carlstrom4b620ff2011-09-11 01:11:01 -07001076InterfaceEntry* ClassLinker::AllocInterfaceEntry(Class* interface) {
1077 DCHECK(interface->IsInterface());
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001078 SirtRef<ObjectArray<Object> > array(AllocObjectArray<Object>(InterfaceEntry::LengthAsArray()));
1079 SirtRef<InterfaceEntry> interface_entry(down_cast<InterfaceEntry*>(array.get()));
Brian Carlstrom4b620ff2011-09-11 01:11:01 -07001080 interface_entry->SetInterface(interface);
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001081 return interface_entry.get();
Brian Carlstrom4b620ff2011-09-11 01:11:01 -07001082}
1083
Brian Carlstrom4873d462011-08-21 15:23:39 -07001084Class* ClassLinker::AllocClass(Class* java_lang_Class, size_t class_size) {
1085 DCHECK_GE(class_size, sizeof(Class));
Elliott Hughesb3bd5f02012-03-08 21:05:27 -08001086 Heap* heap = Runtime::Current()->GetHeap();
1087 SirtRef<Class> klass(heap->AllocObject(java_lang_Class, class_size)->AsClass());
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07001088 klass->SetPrimitiveType(Primitive::kPrimNot); // default to not being primitive
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07001089 klass->SetClassSize(class_size);
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001090 return klass.get();
Brian Carlstrom75cb3b42011-07-28 02:13:36 -07001091}
1092
Brian Carlstrom4873d462011-08-21 15:23:39 -07001093Class* ClassLinker::AllocClass(size_t class_size) {
1094 return AllocClass(GetClassRoot(kJavaLangClass), class_size);
Brian Carlstroma0808032011-07-18 00:39:23 -07001095}
1096
Jesse Wilson35baaab2011-08-10 16:18:03 -04001097Field* ClassLinker::AllocField() {
Brian Carlstrom1f870082011-08-23 16:02:11 -07001098 return down_cast<Field*>(GetClassRoot(kJavaLangReflectField)->AllocObject());
Brian Carlstroma0808032011-07-18 00:39:23 -07001099}
1100
1101Method* ClassLinker::AllocMethod() {
Brian Carlstrom1f870082011-08-23 16:02:11 -07001102 return down_cast<Method*>(GetClassRoot(kJavaLangReflectMethod)->AllocObject());
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001103}
1104
Shih-wei Liao55df06b2011-08-26 14:39:27 -07001105ObjectArray<StackTraceElement>* ClassLinker::AllocStackTraceElementArray(size_t length) {
1106 return ObjectArray<StackTraceElement>::Alloc(
1107 GetClassRoot(kJavaLangStackTraceElementArrayClass),
1108 length);
1109}
1110
Brian Carlstromaded5f72011-10-07 17:15:04 -07001111Class* EnsureResolved(Class* klass) {
1112 DCHECK(klass != NULL);
1113 // Wait for the class if it has not already been linked.
Carl Shapirob5573532011-07-12 18:22:59 -07001114 Thread* self = Thread::Current();
Elliott Hughes5fe594f2011-09-08 12:33:17 -07001115 if (!klass->IsResolved() && !klass->IsErroneous()) {
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07001116 ObjectLock lock(klass);
1117 // Check for circular dependencies between classes.
Elliott Hughes5fe594f2011-09-08 12:33:17 -07001118 if (!klass->IsResolved() && klass->GetClinitThreadId() == self->GetTid()) {
Elliott Hughes5cb5ad22011-10-02 12:13:39 -07001119 self->ThrowNewException("Ljava/lang/ClassCircularityError;",
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08001120 PrettyDescriptor(klass).c_str());
Brian Carlstrom4d9716c2012-01-30 01:49:33 -08001121 klass->SetStatus(Class::kStatusError);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07001122 return NULL;
1123 }
1124 // Wait for the pending initialization to complete.
Elliott Hughes5fe594f2011-09-08 12:33:17 -07001125 while (!klass->IsResolved() && !klass->IsErroneous()) {
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07001126 lock.Wait();
1127 }
1128 }
1129 if (klass->IsErroneous()) {
Elliott Hughes4a2b4172011-09-20 17:08:25 -07001130 ThrowEarlierClassFailure(klass);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07001131 return NULL;
1132 }
1133 // Return the loaded class. No exceptions should be pending.
Brian Carlstromaded5f72011-10-07 17:15:04 -07001134 CHECK(klass->IsResolved()) << PrettyClass(klass);
1135 CHECK(!self->IsExceptionPending())
1136 << PrettyClass(klass) << " " << PrettyTypeOf(self->GetException());
1137 return klass;
1138}
1139
Elliott Hughesdb7d5e92011-12-16 18:47:37 -08001140Class* ClassLinker::FindSystemClass(const char* descriptor) {
1141 return FindClass(descriptor, NULL);
1142}
1143
Elliott Hughesc3b77c72011-12-15 20:56:48 -08001144Class* ClassLinker::FindClass(const char* descriptor, const ClassLoader* class_loader) {
Elliott Hughese84278b2012-03-22 10:06:53 -07001145 if (strstr(descriptor, "TestClass") != NULL) {
1146 LOG(INFO) << "ClassLinker::FindClass " << descriptor;
1147 }
Elliott Hughesba8eee12012-01-24 20:25:24 -08001148 DCHECK_NE(*descriptor, '\0') << "descriptor is empty string";
Brian Carlstromaded5f72011-10-07 17:15:04 -07001149 Thread* self = Thread::Current();
1150 DCHECK(self != NULL);
1151 CHECK(!self->IsExceptionPending()) << PrettyTypeOf(self->GetException());
Elliott Hughesc3b77c72011-12-15 20:56:48 -08001152 if (descriptor[1] == '\0') {
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08001153 // only the descriptors of primitive types should be 1 character long, also avoid class lookup
1154 // for primitive classes that aren't backed by dex files.
1155 return FindPrimitiveClass(descriptor[0]);
1156 }
Brian Carlstromaded5f72011-10-07 17:15:04 -07001157 // Find the class in the loaded classes table.
1158 Class* klass = LookupClass(descriptor, class_loader);
1159 if (klass != NULL) {
1160 return EnsureResolved(klass);
1161 }
Brian Carlstromaded5f72011-10-07 17:15:04 -07001162 // Class is not yet loaded.
1163 if (descriptor[0] == '[') {
1164 return CreateArrayClass(descriptor, class_loader);
Brian Carlstromaded5f72011-10-07 17:15:04 -07001165
Jesse Wilson47daf872011-11-23 11:42:45 -05001166 } else if (class_loader == NULL) {
1167 DexFile::ClassPathEntry pair = DexFile::FindInClassPath(descriptor, boot_class_path_);
1168 if (pair.second != NULL) {
1169 return DefineClass(descriptor, NULL, *pair.first, *pair.second);
1170 }
1171
Elliott Hughesb3bd5f02012-03-08 21:05:27 -08001172 } else if (Runtime::Current()->UseCompileTimeClassPath()) {
Jesse Wilson47daf872011-11-23 11:42:45 -05001173 // first try the boot class path
1174 Class* system_class = FindSystemClass(descriptor);
1175 if (system_class != NULL) {
1176 return system_class;
1177 }
1178 CHECK(self->IsExceptionPending());
1179 self->ClearException();
1180
1181 // next try the compile time class path
Brian Carlstromaded5f72011-10-07 17:15:04 -07001182 const std::vector<const DexFile*>& class_path
Elliott Hughesb3bd5f02012-03-08 21:05:27 -08001183 = Runtime::Current()->GetCompileTimeClassPath(class_loader);
Brian Carlstromaded5f72011-10-07 17:15:04 -07001184 DexFile::ClassPathEntry pair = DexFile::FindInClassPath(descriptor, class_path);
Jesse Wilson47daf872011-11-23 11:42:45 -05001185 if (pair.second != NULL) {
1186 return DefineClass(descriptor, class_loader, *pair.first, *pair.second);
Brian Carlstromaded5f72011-10-07 17:15:04 -07001187 }
Jesse Wilson47daf872011-11-23 11:42:45 -05001188
1189 } else {
Elliott Hughes95572412011-12-13 18:14:20 -08001190 std::string class_name_string(DescriptorToDot(descriptor));
Elliott Hughes09d4d012012-02-03 17:44:20 -08001191 ScopedThreadStateChange tsc(self, Thread::kNative);
Elliott Hughes748382f2012-01-26 18:07:38 -08001192 JNIEnv* env = self->GetJniEnv();
Jesse Wilson47daf872011-11-23 11:42:45 -05001193 ScopedLocalRef<jclass> c(env, AddLocalReference<jclass>(env, GetClassRoot(kJavaLangClassLoader)));
1194 CHECK(c.get() != NULL);
1195 // TODO: cache method?
1196 jmethodID mid = env->GetMethodID(c.get(), "loadClass", "(Ljava/lang/String;)Ljava/lang/Class;");
1197 CHECK(mid != NULL);
1198 ScopedLocalRef<jobject> class_name_object(env, env->NewStringUTF(class_name_string.c_str()));
1199 if (class_name_object.get() == NULL) {
1200 return NULL;
1201 }
1202 ScopedLocalRef<jobject> class_loader_object(env, AddLocalReference<jobject>(env, class_loader));
Ian Rogers761bfa82012-01-11 10:14:05 -08001203 ScopedLocalRef<jobject> result(env, env->CallObjectMethod(class_loader_object.get(), mid,
1204 class_name_object.get()));
Brian Carlstrom4d9716c2012-01-30 01:49:33 -08001205 if (env->ExceptionCheck()) {
Elliott Hughes748382f2012-01-26 18:07:38 -08001206 // If the ClassLoader threw, pass that exception up.
1207 return NULL;
Ian Rogers761bfa82012-01-11 10:14:05 -08001208 } else if (result.get() == NULL) {
Ian Rogerscab01012012-01-10 17:35:46 -08001209 // broken loader - throw NPE to be compatible with Dalvik
1210 ThrowNullPointerException("ClassLoader.loadClass returned null for %s",
1211 class_name_string.c_str());
1212 return NULL;
Ian Rogers761bfa82012-01-11 10:14:05 -08001213 } else {
Ian Rogerscab01012012-01-10 17:35:46 -08001214 // success, return Class*
Ian Rogers6b0870d2011-12-15 19:38:12 -08001215 return Decode<Class*>(env, result.get());
Ian Rogers6b0870d2011-12-15 19:38:12 -08001216 }
Brian Carlstromaded5f72011-10-07 17:15:04 -07001217 }
1218
Elliott Hughesc3b77c72011-12-15 20:56:48 -08001219 ThrowNoClassDefFoundError("Class %s not found", PrintableString(StringPiece(descriptor)).c_str());
Jesse Wilson47daf872011-11-23 11:42:45 -05001220 return NULL;
Brian Carlstromaded5f72011-10-07 17:15:04 -07001221}
1222
Elliott Hughesc3b77c72011-12-15 20:56:48 -08001223Class* ClassLinker::DefineClass(const StringPiece& descriptor,
Brian Carlstromaded5f72011-10-07 17:15:04 -07001224 const ClassLoader* class_loader,
1225 const DexFile& dex_file,
1226 const DexFile::ClassDef& dex_class_def) {
Elliott Hughese84278b2012-03-22 10:06:53 -07001227 if (strstr(descriptor.ToString().c_str(), "TestClass") != NULL) {
1228 LOG(INFO) << "ClassLinker::DefineClass " << descriptor;
1229 Thread::Current()->Dump(LOG(INFO));
1230 }
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001231 SirtRef<Class> klass(NULL);
Brian Carlstromaded5f72011-10-07 17:15:04 -07001232 // Load the class from the dex file.
1233 if (!init_done_) {
1234 // finish up init of hand crafted class_roots_
1235 if (descriptor == "Ljava/lang/Object;") {
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001236 klass.reset(GetClassRoot(kJavaLangObject));
Brian Carlstromaded5f72011-10-07 17:15:04 -07001237 } else if (descriptor == "Ljava/lang/Class;") {
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001238 klass.reset(GetClassRoot(kJavaLangClass));
Brian Carlstromaded5f72011-10-07 17:15:04 -07001239 } else if (descriptor == "Ljava/lang/String;") {
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001240 klass.reset(GetClassRoot(kJavaLangString));
Brian Carlstromaded5f72011-10-07 17:15:04 -07001241 } else if (descriptor == "Ljava/lang/reflect/Constructor;") {
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001242 klass.reset(GetClassRoot(kJavaLangReflectConstructor));
Brian Carlstromaded5f72011-10-07 17:15:04 -07001243 } else if (descriptor == "Ljava/lang/reflect/Field;") {
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001244 klass.reset(GetClassRoot(kJavaLangReflectField));
Brian Carlstromaded5f72011-10-07 17:15:04 -07001245 } else if (descriptor == "Ljava/lang/reflect/Method;") {
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001246 klass.reset(GetClassRoot(kJavaLangReflectMethod));
Brian Carlstromaded5f72011-10-07 17:15:04 -07001247 } else {
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001248 klass.reset(AllocClass(SizeOfClass(dex_file, dex_class_def)));
Brian Carlstromaded5f72011-10-07 17:15:04 -07001249 }
1250 } else {
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001251 klass.reset(AllocClass(SizeOfClass(dex_file, dex_class_def)));
Brian Carlstromaded5f72011-10-07 17:15:04 -07001252 }
1253 klass->SetDexCache(FindDexCache(dex_file));
1254 LoadClass(dex_file, dex_class_def, klass, class_loader);
1255 // Check for a pending exception during load
1256 Thread* self = Thread::Current();
1257 if (self->IsExceptionPending()) {
Brian Carlstrom4d9716c2012-01-30 01:49:33 -08001258 klass->SetStatus(Class::kStatusError);
Brian Carlstromaded5f72011-10-07 17:15:04 -07001259 return NULL;
1260 }
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001261 ObjectLock lock(klass.get());
Brian Carlstromaded5f72011-10-07 17:15:04 -07001262 klass->SetClinitThreadId(self->GetTid());
1263 // Add the newly loaded class to the loaded classes table.
Brian Carlstrom07bb8552012-01-18 22:10:50 -08001264 Class* existing = InsertClass(descriptor, klass.get(), false);
1265 if (existing != NULL) {
1266 // We failed to insert because we raced with another thread.
Brian Carlstromaded5f72011-10-07 17:15:04 -07001267 klass->SetClinitThreadId(0);
Brian Carlstrom07bb8552012-01-18 22:10:50 -08001268 klass.reset(existing);
1269 return EnsureResolved(klass.get());
Brian Carlstromaded5f72011-10-07 17:15:04 -07001270 }
1271 // Finish loading (if necessary) by finding parents
1272 CHECK(!klass->IsLoaded());
1273 if (!LoadSuperAndInterfaces(klass, dex_file)) {
1274 // Loading failed.
Ian Rogers28ad40d2011-10-27 15:19:26 -07001275 klass->SetStatus(Class::kStatusError);
Brian Carlstromaded5f72011-10-07 17:15:04 -07001276 lock.NotifyAll();
1277 return NULL;
1278 }
1279 CHECK(klass->IsLoaded());
1280 // Link the class (if necessary)
1281 CHECK(!klass->IsResolved());
Ian Rogersc2b44472011-12-14 21:17:17 -08001282 if (!LinkClass(klass, NULL)) {
Brian Carlstromaded5f72011-10-07 17:15:04 -07001283 // Linking failed.
Ian Rogers28ad40d2011-10-27 15:19:26 -07001284 klass->SetStatus(Class::kStatusError);
Brian Carlstromaded5f72011-10-07 17:15:04 -07001285 lock.NotifyAll();
1286 return NULL;
1287 }
1288 CHECK(klass->IsResolved());
Elliott Hughes4740cdf2011-12-07 14:07:12 -08001289
1290 /*
1291 * We send CLASS_PREPARE events to the debugger from here. The
1292 * definition of "preparation" is creating the static fields for a
1293 * class and initializing them to the standard default values, but not
1294 * executing any code (that comes later, during "initialization").
1295 *
1296 * We did the static preparation in LinkClass.
1297 *
1298 * The class has been prepared and resolved but possibly not yet verified
1299 * at this point.
1300 */
1301 Dbg::PostClassPrepare(klass.get());
1302
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001303 return klass.get();
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07001304}
1305
Brian Carlstrom4873d462011-08-21 15:23:39 -07001306// Precomputes size that will be needed for Class, matching LinkStaticFields
1307size_t ClassLinker::SizeOfClass(const DexFile& dex_file,
1308 const DexFile::ClassDef& dex_class_def) {
1309 const byte* class_data = dex_file.GetClassData(dex_class_def);
Brian Carlstrom4873d462011-08-21 15:23:39 -07001310 size_t num_ref = 0;
1311 size_t num_32 = 0;
1312 size_t num_64 = 0;
Ian Rogers0571d352011-11-03 19:51:38 -07001313 if (class_data != NULL) {
1314 for (ClassDataItemIterator it(dex_file, class_data); it.HasNextStaticField(); it.Next()) {
1315 const DexFile::FieldId& field_id = dex_file.GetFieldId(it.GetMemberIndex());
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07001316 const char* descriptor = dex_file.GetFieldTypeDescriptor(field_id);
Brian Carlstrom4873d462011-08-21 15:23:39 -07001317 char c = descriptor[0];
1318 if (c == 'L' || c == '[') {
1319 num_ref++;
1320 } else if (c == 'J' || c == 'D') {
1321 num_64++;
1322 } else {
1323 num_32++;
1324 }
1325 }
1326 }
Brian Carlstrom4873d462011-08-21 15:23:39 -07001327 // start with generic class data
1328 size_t size = sizeof(Class);
1329 // follow with reference fields which must be contiguous at start
1330 size += (num_ref * sizeof(uint32_t));
1331 // if there are 64-bit fields to add, make sure they are aligned
1332 if (num_64 != 0 && size != RoundUp(size, 8)) { // for 64-bit alignment
1333 if (num_32 != 0) {
1334 // use an available 32-bit field for padding
1335 num_32--;
1336 }
1337 size += sizeof(uint32_t); // either way, we are adding a word
1338 DCHECK_EQ(size, RoundUp(size, 8));
1339 }
1340 // tack on any 64-bit fields now that alignment is assured
1341 size += (num_64 * sizeof(uint64_t));
1342 // tack on any remaining 32-bit fields
1343 size += (num_32 * sizeof(uint32_t));
1344 return size;
1345}
1346
Ian Rogers19846512012-02-24 11:42:47 -08001347const OatFile::OatClass* ClassLinker::GetOatClass(const DexFile& dex_file, const char* descriptor) {
1348 DCHECK(descriptor != NULL);
Ian Rogers19846512012-02-24 11:42:47 -08001349 const OatFile* oat_file = FindOpenedOatFileForDexFile(dex_file);
1350 CHECK(oat_file != NULL) << dex_file.GetLocation() << " " << descriptor;
1351 const OatFile::OatDexFile* oat_dex_file = oat_file->GetOatDexFile(dex_file.GetLocation());
1352 CHECK(oat_dex_file != NULL) << dex_file.GetLocation() << " " << descriptor;
1353 uint32_t class_def_index;
1354 bool found = dex_file.FindClassDefIndex(descriptor, class_def_index);
1355 CHECK(found) << dex_file.GetLocation() << " " << descriptor;
1356 const OatFile::OatClass* oat_class = oat_dex_file->GetOatClass(class_def_index);
1357 CHECK(oat_class != NULL) << dex_file.GetLocation() << " " << descriptor;
1358 return oat_class;
1359}
1360
Brian Carlstromf5822582012-03-19 22:34:31 -07001361// Special case to get oat code without overwriting a trampoline.
Ian Rogers19846512012-02-24 11:42:47 -08001362const void* ClassLinker::GetOatCodeFor(const Method* method) {
Brian Carlstromf5822582012-03-19 22:34:31 -07001363 CHECK(Runtime::Current()->IsCompiler() || method->GetDeclaringClass()->IsInitializing());
Ian Rogers19846512012-02-24 11:42:47 -08001364 // Although we overwrite the trampoline of non-static methods, we may get here via the resolution
Ian Rogersfb6adba2012-03-04 21:51:51 -08001365 // method for direct methods (or virtual methods made direct).
1366 Class* declaring_class = method->GetDeclaringClass();
1367 size_t oat_method_index;
1368 if (method->IsStatic() || method->IsDirect()) {
1369 // Simple case where the oat method index was stashed at load time.
1370 oat_method_index = method->GetMethodIndex();
1371 } else {
1372 // We're invoking a virtual method directly (thanks to sharpening), compute the oat_method_index
1373 // by search for its position in the declared virtual methods.
1374 oat_method_index = declaring_class->NumDirectMethods();
1375 size_t end = declaring_class->NumVirtualMethods();
1376 bool found = false;
1377 for (size_t i = 0; i < end; i++) {
Ian Rogersfb6adba2012-03-04 21:51:51 -08001378 if (declaring_class->GetVirtualMethod(i) == method) {
1379 found = true;
1380 break;
1381 }
Ian Rogersf320b632012-03-13 18:47:47 -07001382 oat_method_index++;
Ian Rogersfb6adba2012-03-04 21:51:51 -08001383 }
1384 CHECK(found) << "Didn't find oat method index for virtual method: " << PrettyMethod(method);
1385 }
1386 ClassHelper kh(declaring_class);
Ian Rogers19846512012-02-24 11:42:47 -08001387 UniquePtr<const OatFile::OatClass> oat_class(GetOatClass(kh.GetDexFile(), kh.GetDescriptor()));
Brian Carlstromf5822582012-03-19 22:34:31 -07001388 CHECK(oat_class.get() != NULL);
Ian Rogersfb6adba2012-03-04 21:51:51 -08001389 return oat_class->GetOatMethod(oat_method_index).GetCode();
Ian Rogers19846512012-02-24 11:42:47 -08001390}
1391
1392void ClassLinker::FixupStaticTrampolines(Class* klass) {
1393 ClassHelper kh(klass);
1394 const DexFile::ClassDef* dex_class_def = kh.GetClassDef();
1395 CHECK(dex_class_def != NULL);
1396 const DexFile& dex_file = kh.GetDexFile();
1397 const byte* class_data = dex_file.GetClassData(*dex_class_def);
1398 if (class_data == NULL) {
1399 return; // no fields or methods - for example a marker interface
1400 }
Brian Carlstromf5822582012-03-19 22:34:31 -07001401 if (!Runtime::Current()->IsStarted() || Runtime::Current()->UseCompileTimeClassPath()) {
Ian Rogers19846512012-02-24 11:42:47 -08001402 // OAT file unavailable
1403 return;
1404 }
Brian Carlstromf5822582012-03-19 22:34:31 -07001405 UniquePtr<const OatFile::OatClass> oat_class(GetOatClass(dex_file, kh.GetDescriptor()));
1406 CHECK(oat_class.get() != NULL);
Ian Rogers19846512012-02-24 11:42:47 -08001407 ClassDataItemIterator it(dex_file, class_data);
1408 // Skip fields
1409 while (it.HasNextStaticField()) {
1410 it.Next();
1411 }
1412 while (it.HasNextInstanceField()) {
1413 it.Next();
1414 }
1415 size_t method_index = 0;
1416 // Link the code of methods skipped by LinkCode
1417 const void* trampoline = Runtime::Current()->GetResolutionStubArray(Runtime::kStaticMethod)->GetData();
1418 for (size_t i = 0; it.HasNextDirectMethod(); i++, it.Next()) {
1419 Method* method = klass->GetDirectMethod(i);
jeffhaob5e81852012-03-12 11:15:45 -07001420 if (Runtime::Current()->IsMethodTracingActive()) {
1421 Trace* tracer = Runtime::Current()->GetTracer();
1422 if (tracer->GetSavedCodeFromMap(method) == trampoline) {
1423 const void* code = oat_class->GetOatMethod(method_index).GetCode();
1424 tracer->ResetSavedCode(method);
1425 method->SetCode(code);
1426 tracer->SaveAndUpdateCode(method);
1427 }
1428 } else if (method->GetCode() == trampoline) {
Ian Rogers19846512012-02-24 11:42:47 -08001429 const void* code = oat_class->GetOatMethod(method_index).GetCode();
1430 CHECK(code != NULL);
1431 method->SetCode(code);
1432 }
1433 method_index++;
1434 }
1435}
1436
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001437void LinkCode(SirtRef<Method>& method, const OatFile::OatClass* oat_class, uint32_t method_index) {
Brian Carlstrom92827a52011-10-10 15:50:01 -07001438 // Every kind of method should at least get an invoke stub from the oat_method.
1439 // non-abstract methods also get their code pointers.
1440 const OatFile::OatMethod oat_method = oat_class->GetOatMethod(method_index);
Brian Carlstromae826982011-11-09 01:33:42 -08001441 oat_method.LinkMethodPointers(method.get());
Brian Carlstrom92827a52011-10-10 15:50:01 -07001442
Ian Rogers19846512012-02-24 11:42:47 -08001443 Runtime* runtime = Runtime::Current();
Brian Carlstrom92827a52011-10-10 15:50:01 -07001444 if (method->IsAbstract()) {
Ian Rogers19846512012-02-24 11:42:47 -08001445 method->SetCode(runtime->GetAbstractMethodErrorStubArray()->GetData());
Brian Carlstrom92827a52011-10-10 15:50:01 -07001446 return;
1447 }
Ian Rogers19846512012-02-24 11:42:47 -08001448
1449 if (method->IsStatic() && !method->IsConstructor()) {
1450 // For static methods excluding the class initializer, install the trampoline
1451 method->SetCode(runtime->GetResolutionStubArray(Runtime::kStaticMethod)->GetData());
Ian Rogers0d6de042012-02-29 08:50:26 -08001452 }
1453 if (method->IsNative()) {
Brian Carlstrom92827a52011-10-10 15:50:01 -07001454 // unregistering restores the dlsym lookup stub
Ian Rogers19846512012-02-24 11:42:47 -08001455 method->UnregisterNative(Thread::Current());
jeffhao26c0a1a2012-01-17 16:28:33 -08001456 }
1457
1458 if (Runtime::Current()->IsMethodTracingActive()) {
jeffhao26c0a1a2012-01-17 16:28:33 -08001459 Trace* tracer = Runtime::Current()->GetTracer();
jeffhaob5e81852012-03-12 11:15:45 -07001460 tracer->SaveAndUpdateCode(method.get());
Brian Carlstrom92827a52011-10-10 15:50:01 -07001461 }
1462}
1463
Brian Carlstromf615a612011-07-23 12:50:34 -07001464void ClassLinker::LoadClass(const DexFile& dex_file,
1465 const DexFile::ClassDef& dex_class_def,
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001466 SirtRef<Class>& klass,
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07001467 const ClassLoader* class_loader) {
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001468 CHECK(klass.get() != NULL);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07001469 CHECK(klass->GetDexCache() != NULL);
1470 CHECK_EQ(Class::kStatusNotReady, klass->GetStatus());
Brian Carlstromf615a612011-07-23 12:50:34 -07001471 const char* descriptor = dex_file.GetClassDescriptor(dex_class_def);
Brian Carlstrom934486c2011-07-12 23:42:50 -07001472 CHECK(descriptor != NULL);
1473
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07001474 klass->SetClass(GetClassRoot(kJavaLangClass));
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07001475 uint32_t access_flags = dex_class_def.access_flags_;
Elliott Hughes582a7d12011-10-10 18:38:42 -07001476 // Make sure that none of our runtime-only flags are set.
1477 CHECK_EQ(access_flags & ~kAccJavaFlagsMask, 0U);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07001478 klass->SetAccessFlags(access_flags);
1479 klass->SetClassLoader(class_loader);
Ian Rogersc2b44472011-12-14 21:17:17 -08001480 DCHECK_EQ(klass->GetPrimitiveType(), Primitive::kPrimNot);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07001481 klass->SetStatus(Class::kStatusIdx);
Brian Carlstrom934486c2011-07-12 23:42:50 -07001482
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08001483 klass->SetDexTypeIndex(dex_class_def.class_idx_);
Brian Carlstrom934486c2011-07-12 23:42:50 -07001484
Ian Rogers0571d352011-11-03 19:51:38 -07001485 // Load fields fields.
1486 const byte* class_data = dex_file.GetClassData(dex_class_def);
1487 if (class_data == NULL) {
1488 return; // no fields or methods - for example a marker interface
Brian Carlstrom934486c2011-07-12 23:42:50 -07001489 }
Ian Rogers0571d352011-11-03 19:51:38 -07001490 ClassDataItemIterator it(dex_file, class_data);
1491 if (it.NumStaticFields() != 0) {
1492 klass->SetSFields(AllocObjectArray<Field>(it.NumStaticFields()));
1493 }
1494 if (it.NumInstanceFields() != 0) {
1495 klass->SetIFields(AllocObjectArray<Field>(it.NumInstanceFields()));
1496 }
1497 for (size_t i = 0; it.HasNextStaticField(); i++, it.Next()) {
1498 SirtRef<Field> sfield(AllocField());
1499 klass->SetStaticField(i, sfield.get());
1500 LoadField(dex_file, it, klass, sfield);
1501 }
1502 for (size_t i = 0; it.HasNextInstanceField(); i++, it.Next()) {
1503 SirtRef<Field> ifield(AllocField());
1504 klass->SetInstanceField(i, ifield.get());
1505 LoadField(dex_file, it, klass, ifield);
Brian Carlstrom934486c2011-07-12 23:42:50 -07001506 }
1507
Brian Carlstromf5822582012-03-19 22:34:31 -07001508 UniquePtr<const OatFile::OatClass> oat_class;
1509 if (Runtime::Current()->IsStarted() && !Runtime::Current()->UseCompileTimeClassPath()) {
1510 oat_class.reset(GetOatClass(dex_file, descriptor));
1511 }
Ian Rogers19846512012-02-24 11:42:47 -08001512
Ian Rogers0571d352011-11-03 19:51:38 -07001513 // Load methods.
1514 if (it.NumDirectMethods() != 0) {
Brian Carlstrom934486c2011-07-12 23:42:50 -07001515 // TODO: append direct methods to class object
Ian Rogers0571d352011-11-03 19:51:38 -07001516 klass->SetDirectMethods(AllocObjectArray<Method>(it.NumDirectMethods()));
Brian Carlstrom934486c2011-07-12 23:42:50 -07001517 }
Ian Rogers0571d352011-11-03 19:51:38 -07001518 if (it.NumVirtualMethods() != 0) {
1519 // TODO: append direct methods to class object
1520 klass->SetVirtualMethods(AllocObjectArray<Method>(it.NumVirtualMethods()));
Brian Carlstrom934486c2011-07-12 23:42:50 -07001521 }
Ian Rogersfb6adba2012-03-04 21:51:51 -08001522 size_t class_def_method_index = 0;
Ian Rogers0571d352011-11-03 19:51:38 -07001523 for (size_t i = 0; it.HasNextDirectMethod(); i++, it.Next()) {
1524 SirtRef<Method> method(AllocMethod());
1525 klass->SetDirectMethod(i, method.get());
1526 LoadMethod(dex_file, it, klass, method);
1527 if (oat_class.get() != NULL) {
Ian Rogersfb6adba2012-03-04 21:51:51 -08001528 LinkCode(method, oat_class.get(), class_def_method_index);
Ian Rogers0571d352011-11-03 19:51:38 -07001529 }
Ian Rogersfb6adba2012-03-04 21:51:51 -08001530 method->SetMethodIndex(class_def_method_index);
1531 class_def_method_index++;
Ian Rogers0571d352011-11-03 19:51:38 -07001532 }
1533 for (size_t i = 0; it.HasNextVirtualMethod(); i++, it.Next()) {
1534 SirtRef<Method> method(AllocMethod());
1535 klass->SetVirtualMethod(i, method.get());
1536 LoadMethod(dex_file, it, klass, method);
Ian Rogersfb6adba2012-03-04 21:51:51 -08001537 DCHECK_EQ(class_def_method_index, it.NumDirectMethods() + i);
Ian Rogers0571d352011-11-03 19:51:38 -07001538 if (oat_class.get() != NULL) {
Ian Rogersfb6adba2012-03-04 21:51:51 -08001539 LinkCode(method, oat_class.get(), class_def_method_index);
Ian Rogers0571d352011-11-03 19:51:38 -07001540 }
Ian Rogersfb6adba2012-03-04 21:51:51 -08001541 class_def_method_index++;
Ian Rogers0571d352011-11-03 19:51:38 -07001542 }
1543 DCHECK(!it.HasNext());
Brian Carlstrom934486c2011-07-12 23:42:50 -07001544}
1545
Elliott Hughes1bac54f2012-03-16 12:48:31 -07001546void ClassLinker::LoadField(const DexFile& /*dex_file*/, const ClassDataItemIterator& it,
Ian Rogers0571d352011-11-03 19:51:38 -07001547 SirtRef<Class>& klass, SirtRef<Field>& dst) {
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08001548 uint32_t field_idx = it.GetMemberIndex();
1549 dst->SetDexFieldIndex(field_idx);
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001550 dst->SetDeclaringClass(klass.get());
Ian Rogers0571d352011-11-03 19:51:38 -07001551 dst->SetAccessFlags(it.GetMemberAccessFlags());
Brian Carlstrom934486c2011-07-12 23:42:50 -07001552}
1553
Ian Rogers0571d352011-11-03 19:51:38 -07001554void ClassLinker::LoadMethod(const DexFile& dex_file, const ClassDataItemIterator& it,
1555 SirtRef<Class>& klass, SirtRef<Method>& dst) {
Ian Rogers19846512012-02-24 11:42:47 -08001556 uint32_t dex_method_idx = it.GetMemberIndex();
1557 dst->SetDexMethodIndex(dex_method_idx);
1558 const DexFile::MethodId& method_id = dex_file.GetMethodId(dex_method_idx);
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001559 dst->SetDeclaringClass(klass.get());
Elliott Hughes20cde902011-10-04 17:37:27 -07001560
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08001561
1562 StringPiece method_name(dex_file.GetMethodName(method_id));
1563 if (method_name == "<init>") {
Elliott Hughes80609252011-09-23 17:24:51 -07001564 dst->SetClass(GetClassRoot(kJavaLangReflectConstructor));
1565 }
Elliott Hughes20cde902011-10-04 17:37:27 -07001566
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08001567 if (method_name == "finalize") {
1568 // Create the prototype for a signature of "()V"
1569 const DexFile::StringId* void_string_id = dex_file.FindStringId("V");
1570 if (void_string_id != NULL) {
1571 const DexFile::TypeId* void_type_id =
1572 dex_file.FindTypeId(dex_file.GetIndexForStringId(*void_string_id));
1573 if (void_type_id != NULL) {
1574 std::vector<uint16_t> no_args;
1575 const DexFile::ProtoId* finalizer_proto =
1576 dex_file.FindProtoId(dex_file.GetIndexForTypeId(*void_type_id), no_args);
1577 if (finalizer_proto != NULL) {
1578 // We have the prototype in the dex file
1579 if (klass->GetClassLoader() != NULL) { // All non-boot finalizer methods are flagged
1580 klass->SetFinalizable();
1581 } else {
1582 StringPiece klass_descriptor(dex_file.StringByTypeIdx(klass->GetDexTypeIndex()));
1583 // The Enum class declares a "final" finalize() method to prevent subclasses from
1584 // introducing a finalizer. We don't want to set the finalizable flag for Enum or its
1585 // subclasses, so we exclude it here.
1586 // We also want to avoid setting the flag on Object, where we know that finalize() is
1587 // empty.
1588 if (klass_descriptor != "Ljava/lang/Object;" &&
1589 klass_descriptor != "Ljava/lang/Enum;") {
1590 klass->SetFinalizable();
1591 }
1592 }
1593 }
1594 }
Elliott Hughes20cde902011-10-04 17:37:27 -07001595 }
Carl Shapiro419ec7b2011-08-03 14:48:33 -07001596 }
Ian Rogers0571d352011-11-03 19:51:38 -07001597 dst->SetCodeItemOffset(it.GetMethodCodeItemOffset());
Ian Rogers0571d352011-11-03 19:51:38 -07001598 dst->SetAccessFlags(it.GetMemberAccessFlags());
Brian Carlstrom934486c2011-07-12 23:42:50 -07001599
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07001600 dst->SetDexCacheStrings(klass->GetDexCache()->GetStrings());
Ian Rogers19846512012-02-24 11:42:47 -08001601 dst->SetDexCacheResolvedMethods(klass->GetDexCache()->GetResolvedMethods());
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07001602 dst->SetDexCacheResolvedTypes(klass->GetDexCache()->GetResolvedTypes());
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07001603 dst->SetDexCacheInitializedStaticStorage(klass->GetDexCache()->GetInitializedStaticStorage());
Brian Carlstrom934486c2011-07-12 23:42:50 -07001604}
1605
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07001606void ClassLinker::AppendToBootClassPath(const DexFile& dex_file) {
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001607 SirtRef<DexCache> dex_cache(AllocDexCache(dex_file));
1608 AppendToBootClassPath(dex_file, dex_cache);
Brian Carlstroma663ea52011-08-19 23:33:41 -07001609}
1610
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001611void ClassLinker::AppendToBootClassPath(const DexFile& dex_file, SirtRef<DexCache>& dex_cache) {
1612 CHECK(dex_cache.get() != NULL) << dex_file.GetLocation();
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07001613 boot_class_path_.push_back(&dex_file);
Brian Carlstroma663ea52011-08-19 23:33:41 -07001614 RegisterDexFile(dex_file, dex_cache);
Brian Carlstrom578bbdc2011-07-21 14:07:47 -07001615}
1616
Brian Carlstromaded5f72011-10-07 17:15:04 -07001617bool ClassLinker::IsDexFileRegisteredLocked(const DexFile& dex_file) const {
Brian Carlstrom47d237a2011-10-18 15:08:33 -07001618 dex_lock_.AssertHeld();
Brian Carlstromaded5f72011-10-07 17:15:04 -07001619 for (size_t i = 0; i != dex_files_.size(); ++i) {
1620 if (dex_files_[i] == &dex_file) {
Ian Rogers19846512012-02-24 11:42:47 -08001621 return true;
Brian Carlstromaded5f72011-10-07 17:15:04 -07001622 }
1623 }
1624 return false;
Brian Carlstroma663ea52011-08-19 23:33:41 -07001625}
1626
Brian Carlstromaded5f72011-10-07 17:15:04 -07001627bool ClassLinker::IsDexFileRegistered(const DexFile& dex_file) const {
Brian Carlstrom47d237a2011-10-18 15:08:33 -07001628 MutexLock mu(dex_lock_);
Brian Carlstrom06918512011-10-16 23:39:12 -07001629 return IsDexFileRegisteredLocked(dex_file);
Brian Carlstromaded5f72011-10-07 17:15:04 -07001630}
1631
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001632void ClassLinker::RegisterDexFileLocked(const DexFile& dex_file, SirtRef<DexCache>& dex_cache) {
Brian Carlstrom47d237a2011-10-18 15:08:33 -07001633 dex_lock_.AssertHeld();
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001634 CHECK(dex_cache.get() != NULL) << dex_file.GetLocation();
Brian Carlstrom69b15fb2011-09-03 12:25:21 -07001635 CHECK(dex_cache->GetLocation()->Equals(dex_file.GetLocation()));
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07001636 dex_files_.push_back(&dex_file);
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001637 dex_caches_.push_back(dex_cache.get());
Brian Carlstrom578bbdc2011-07-21 14:07:47 -07001638}
1639
Brian Carlstromaded5f72011-10-07 17:15:04 -07001640void ClassLinker::RegisterDexFile(const DexFile& dex_file) {
Brian Carlstrom47d237a2011-10-18 15:08:33 -07001641 {
1642 MutexLock mu(dex_lock_);
1643 if (IsDexFileRegisteredLocked(dex_file)) {
1644 return;
1645 }
Brian Carlstromaded5f72011-10-07 17:15:04 -07001646 }
Brian Carlstrom47d237a2011-10-18 15:08:33 -07001647 // Don't alloc while holding the lock, since allocation may need to
1648 // suspend all threads and another thread may need the dex_lock_ to
1649 // get to a suspend point.
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001650 SirtRef<DexCache> dex_cache(AllocDexCache(dex_file));
Brian Carlstrom47d237a2011-10-18 15:08:33 -07001651 {
1652 MutexLock mu(dex_lock_);
1653 if (IsDexFileRegisteredLocked(dex_file)) {
1654 return;
1655 }
1656 RegisterDexFileLocked(dex_file, dex_cache);
1657 }
Brian Carlstromaded5f72011-10-07 17:15:04 -07001658}
1659
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001660void ClassLinker::RegisterDexFile(const DexFile& dex_file, SirtRef<DexCache>& dex_cache) {
Brian Carlstrom47d237a2011-10-18 15:08:33 -07001661 MutexLock mu(dex_lock_);
Brian Carlstromaded5f72011-10-07 17:15:04 -07001662 RegisterDexFileLocked(dex_file, dex_cache);
1663}
1664
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001665const DexFile& ClassLinker::FindDexFile(const DexCache* dex_cache) const {
Ian Rogers466bb252011-10-14 03:29:56 -07001666 CHECK(dex_cache != NULL);
Brian Carlstrom47d237a2011-10-18 15:08:33 -07001667 MutexLock mu(dex_lock_);
Brian Carlstrom7e49dca2011-07-22 18:07:34 -07001668 for (size_t i = 0; i != dex_caches_.size(); ++i) {
1669 if (dex_caches_[i] == dex_cache) {
Ian Rogers19846512012-02-24 11:42:47 -08001670 return *dex_files_[i];
Brian Carlstrom578bbdc2011-07-21 14:07:47 -07001671 }
1672 }
Brian Carlstrom69b15fb2011-09-03 12:25:21 -07001673 CHECK(false) << "Failed to find DexFile for DexCache " << dex_cache->GetLocation()->ToModifiedUtf8();
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001674 return *dex_files_[-1];
Brian Carlstrom578bbdc2011-07-21 14:07:47 -07001675}
1676
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07001677DexCache* ClassLinker::FindDexCache(const DexFile& dex_file) const {
Brian Carlstrom47d237a2011-10-18 15:08:33 -07001678 MutexLock mu(dex_lock_);
Brian Carlstromf615a612011-07-23 12:50:34 -07001679 for (size_t i = 0; i != dex_files_.size(); ++i) {
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07001680 if (dex_files_[i] == &dex_file) {
Ian Rogers19846512012-02-24 11:42:47 -08001681 return dex_caches_[i];
Brian Carlstrom578bbdc2011-07-21 14:07:47 -07001682 }
1683 }
Brian Carlstrom69b15fb2011-09-03 12:25:21 -07001684 CHECK(false) << "Failed to find DexCache for DexFile " << dex_file.GetLocation();
Brian Carlstrom578bbdc2011-07-21 14:07:47 -07001685 return NULL;
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07001686}
1687
Ian Rogers19846512012-02-24 11:42:47 -08001688void ClassLinker::FixupDexCaches(Method* resolution_method) const {
1689 MutexLock mu(dex_lock_);
1690 for (size_t i = 0; i != dex_caches_.size(); ++i) {
1691 dex_caches_[i]->Fixup(resolution_method);
1692 }
1693}
1694
Brian Carlstrom5b8e4c82011-09-18 01:38:59 -07001695Class* ClassLinker::InitializePrimitiveClass(Class* primitive_class,
1696 const char* descriptor,
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07001697 Primitive::Type type) {
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07001698 // TODO: deduce one argument from the other
Brian Carlstrom5b8e4c82011-09-18 01:38:59 -07001699 CHECK(primitive_class != NULL);
1700 primitive_class->SetAccessFlags(kAccPublic | kAccFinal | kAccAbstract);
Brian Carlstrom5b8e4c82011-09-18 01:38:59 -07001701 primitive_class->SetPrimitiveType(type);
1702 primitive_class->SetStatus(Class::kStatusInitialized);
Brian Carlstrom07bb8552012-01-18 22:10:50 -08001703 Class* existing = InsertClass(descriptor, primitive_class, false);
1704 CHECK(existing == NULL) << "InitPrimitiveClass(" << descriptor << ") failed";
Brian Carlstrom5b8e4c82011-09-18 01:38:59 -07001705 return primitive_class;
Carl Shapiro565f5072011-07-10 13:39:43 -07001706}
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07001707
Brian Carlstrombe977852011-07-19 14:54:54 -07001708// Create an array class (i.e. the class object for the array, not the
1709// array itself). "descriptor" looks like "[C" or "[[[[B" or
1710// "[Ljava/lang/String;".
1711//
1712// If "descriptor" refers to an array of primitives, look up the
1713// primitive type's internally-generated class object.
1714//
Brian Carlstrom5b8e4c82011-09-18 01:38:59 -07001715// "class_loader" is the class loader of the class that's referring to
1716// us. It's used to ensure that we're looking for the element type in
1717// the right context. It does NOT become the class loader for the
1718// array class; that always comes from the base element class.
Brian Carlstrombe977852011-07-19 14:54:54 -07001719//
1720// Returns NULL with an exception raised on failure.
Elliott Hughesc3b77c72011-12-15 20:56:48 -08001721Class* ClassLinker::CreateArrayClass(const std::string& descriptor, const ClassLoader* class_loader) {
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07001722 CHECK_EQ('[', descriptor[0]);
Brian Carlstroma331b3c2011-07-18 17:47:56 -07001723
Brian Carlstrom5b8e4c82011-09-18 01:38:59 -07001724 // Identify the underlying component type
Elliott Hughesc3b77c72011-12-15 20:56:48 -08001725 Class* component_type = FindClass(descriptor.substr(1).c_str(), class_loader);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07001726 if (component_type == NULL) {
Brian Carlstrom5b8e4c82011-09-18 01:38:59 -07001727 DCHECK(Thread::Current()->IsExceptionPending());
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001728 return NULL;
1729 }
Brian Carlstroma331b3c2011-07-18 17:47:56 -07001730
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001731 // See if the component type is already loaded. Array classes are
1732 // always associated with the class loader of their underlying
1733 // element type -- an array of Strings goes with the loader for
1734 // java/lang/String -- so we need to look for it there. (The
1735 // caller should have checked for the existence of the class
1736 // before calling here, but they did so with *their* class loader,
1737 // not the component type's loader.)
1738 //
1739 // If we find it, the caller adds "loader" to the class' initiating
1740 // loader list, which should prevent us from going through this again.
1741 //
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07001742 // This call is unnecessary if "loader" and "component_type->GetClassLoader()"
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001743 // are the same, because our caller (FindClass) just did the
1744 // lookup. (Even if we get this wrong we still have correct behavior,
1745 // because we effectively do this lookup again when we add the new
1746 // class to the hash table --- necessary because of possible races with
1747 // other threads.)
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07001748 if (class_loader != component_type->GetClassLoader()) {
Elliott Hughesc3b77c72011-12-15 20:56:48 -08001749 Class* new_class = LookupClass(descriptor.c_str(), component_type->GetClassLoader());
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001750 if (new_class != NULL) {
Brian Carlstroma331b3c2011-07-18 17:47:56 -07001751 return new_class;
1752 }
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001753 }
Brian Carlstroma331b3c2011-07-18 17:47:56 -07001754
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001755 // Fill out the fields in the Class.
1756 //
1757 // It is possible to execute some methods against arrays, because
1758 // all arrays are subclasses of java_lang_Object_, so we need to set
1759 // up a vtable. We can just point at the one in java_lang_Object_.
1760 //
1761 // Array classes are simple enough that we don't need to do a full
1762 // link step.
1763
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001764 SirtRef<Class> new_class(NULL);
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001765 if (!init_done_) {
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07001766 // Classes that were hand created, ie not by FindSystemClass
Elliott Hughes418d20f2011-09-22 14:00:39 -07001767 if (descriptor == "[Ljava/lang/Class;") {
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001768 new_class.reset(GetClassRoot(kClassArrayClass));
Elliott Hughes418d20f2011-09-22 14:00:39 -07001769 } else if (descriptor == "[Ljava/lang/Object;") {
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001770 new_class.reset(GetClassRoot(kObjectArrayClass));
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001771 } else if (descriptor == "[C") {
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001772 new_class.reset(GetClassRoot(kCharArrayClass));
Elliott Hughesc1674ed2011-08-25 18:09:09 -07001773 } else if (descriptor == "[I") {
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001774 new_class.reset(GetClassRoot(kIntArrayClass));
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001775 }
1776 }
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001777 if (new_class.get() == NULL) {
1778 new_class.reset(AllocClass(sizeof(Class)));
1779 if (new_class.get() == NULL) {
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001780 return NULL;
1781 }
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07001782 new_class->SetComponentType(component_type);
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001783 }
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07001784 DCHECK(new_class->GetComponentType() != NULL);
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001785 Class* java_lang_Object = GetClassRoot(kJavaLangObject);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07001786 new_class->SetSuperClass(java_lang_Object);
1787 new_class->SetVTable(java_lang_Object->GetVTable());
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07001788 new_class->SetPrimitiveType(Primitive::kPrimNot);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07001789 new_class->SetClassLoader(component_type->GetClassLoader());
1790 new_class->SetStatus(Class::kStatusInitialized);
1791 // don't need to set new_class->SetObjectSize(..)
Brian Carlstrom9cff8e12011-08-18 16:47:29 -07001792 // because Object::SizeOf delegates to Array::SizeOf
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001793
1794
1795 // All arrays have java/lang/Cloneable and java/io/Serializable as
1796 // interfaces. We need to set that up here, so that stuff like
1797 // "instanceof" works right.
1798 //
1799 // Note: The GC could run during the call to FindSystemClass,
1800 // so we need to make sure the class object is GC-valid while we're in
1801 // there. Do this by clearing the interface list so the GC will just
1802 // think that the entries are null.
1803
1804
1805 // Use the single, global copies of "interfaces" and "iftable"
1806 // (remember not to free them for arrays).
Elliott Hughes92f14b22011-10-06 12:29:54 -07001807 CHECK(array_iftable_ != NULL);
Brian Carlstrom4b620ff2011-09-11 01:11:01 -07001808 new_class->SetIfTable(array_iftable_);
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001809
1810 // Inherit access flags from the component type. Arrays can't be
1811 // used as a superclass or interface, so we want to add "final"
1812 // and remove "interface".
1813 //
1814 // Don't inherit any non-standard flags (e.g., kAccFinal)
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07001815 // from component_type. We assume that the array class does not
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001816 // override finalize().
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07001817 new_class->SetAccessFlags(((new_class->GetComponentType()->GetAccessFlags() &
1818 ~kAccInterface) | kAccFinal) & kAccJavaFlagsMask);
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001819
Brian Carlstrom07bb8552012-01-18 22:10:50 -08001820 Class* existing = InsertClass(descriptor, new_class.get(), false);
1821 if (existing == NULL) {
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001822 return new_class.get();
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001823 }
1824 // Another thread must have loaded the class after we
1825 // started but before we finished. Abandon what we've
1826 // done.
1827 //
1828 // (Yes, this happens.)
1829
Brian Carlstrom07bb8552012-01-18 22:10:50 -08001830 return existing;
Brian Carlstroma331b3c2011-07-18 17:47:56 -07001831}
1832
1833Class* ClassLinker::FindPrimitiveClass(char type) {
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07001834 switch (Primitive::GetType(type)) {
1835 case Primitive::kPrimByte:
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001836 return GetClassRoot(kPrimitiveByte);
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07001837 case Primitive::kPrimChar:
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001838 return GetClassRoot(kPrimitiveChar);
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07001839 case Primitive::kPrimDouble:
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001840 return GetClassRoot(kPrimitiveDouble);
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07001841 case Primitive::kPrimFloat:
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001842 return GetClassRoot(kPrimitiveFloat);
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07001843 case Primitive::kPrimInt:
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001844 return GetClassRoot(kPrimitiveInt);
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07001845 case Primitive::kPrimLong:
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001846 return GetClassRoot(kPrimitiveLong);
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07001847 case Primitive::kPrimShort:
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001848 return GetClassRoot(kPrimitiveShort);
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07001849 case Primitive::kPrimBoolean:
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001850 return GetClassRoot(kPrimitiveBoolean);
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07001851 case Primitive::kPrimVoid:
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001852 return GetClassRoot(kPrimitiveVoid);
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07001853 case Primitive::kPrimNot:
1854 break;
Carl Shapiro744ad052011-08-06 15:53:36 -07001855 }
Elliott Hughesbd935992011-08-22 11:59:34 -07001856 std::string printable_type(PrintableChar(type));
Elliott Hughes4a2b4172011-09-20 17:08:25 -07001857 ThrowNoClassDefFoundError("Not a primitive type: %s", printable_type.c_str());
Elliott Hughesbd935992011-08-22 11:59:34 -07001858 return NULL;
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07001859}
1860
Brian Carlstrom07bb8552012-01-18 22:10:50 -08001861Class* ClassLinker::InsertClass(const StringPiece& descriptor, Class* klass, bool image_class) {
Elliott Hughes4dd9b4d2011-12-12 18:29:24 -08001862 if (VLOG_IS_ON(class_linker)) {
Brian Carlstromae826982011-11-09 01:33:42 -08001863 DexCache* dex_cache = klass->GetDexCache();
1864 std::string source;
1865 if (dex_cache != NULL) {
1866 source += " from ";
1867 source += dex_cache->GetLocation()->ToModifiedUtf8();
1868 }
1869 LOG(INFO) << "Loaded class " << descriptor << source;
1870 }
Brian Carlstrom9cff8e12011-08-18 16:47:29 -07001871 size_t hash = StringPieceHash()(descriptor);
Brian Carlstrom47d237a2011-10-18 15:08:33 -07001872 MutexLock mu(classes_lock_);
Brian Carlstrom07bb8552012-01-18 22:10:50 -08001873 Table& classes = image_class ? image_classes_ : classes_;
1874 Class* existing = LookupClass(descriptor.data(), klass->GetClassLoader(), hash, classes);
1875#ifndef NDEBUG
1876 // Check we don't have the class in the other table in error
1877 Table& other_classes = image_class ? classes_ : image_classes_;
1878 CHECK(LookupClass(descriptor.data(), klass->GetClassLoader(), hash, other_classes) == NULL);
1879#endif
1880 if (existing != NULL) {
1881 return existing;
Ian Rogers5d76c432011-10-31 21:42:49 -07001882 }
Brian Carlstrom07bb8552012-01-18 22:10:50 -08001883 classes.insert(std::make_pair(hash, klass));
1884 return NULL;
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07001885}
1886
Elliott Hughesc3b77c72011-12-15 20:56:48 -08001887bool ClassLinker::RemoveClass(const char* descriptor, const ClassLoader* class_loader) {
1888 size_t hash = Hash(descriptor);
Brian Carlstromae826982011-11-09 01:33:42 -08001889 MutexLock mu(classes_lock_);
Elliott Hughese5448b52012-01-18 16:44:06 -08001890 typedef Table::iterator It; // TODO: C++0x auto
Brian Carlstromae826982011-11-09 01:33:42 -08001891 // TODO: determine if its better to search classes_ or image_classes_ first
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08001892 ClassHelper kh;
Brian Carlstrom07bb8552012-01-18 22:10:50 -08001893 for (It it = classes_.lower_bound(hash), end = classes_.end(); it != end && it->first == hash; ++it) {
Brian Carlstromae826982011-11-09 01:33:42 -08001894 Class* klass = it->second;
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08001895 kh.ChangeClass(klass);
Elliott Hughesc3b77c72011-12-15 20:56:48 -08001896 if (strcmp(kh.GetDescriptor(), descriptor) == 0 && klass->GetClassLoader() == class_loader) {
Brian Carlstromae826982011-11-09 01:33:42 -08001897 classes_.erase(it);
1898 return true;
1899 }
1900 }
Brian Carlstrom07bb8552012-01-18 22:10:50 -08001901 for (It it = image_classes_.lower_bound(hash), end = classes_.end(); it != end && it->first == hash; ++it) {
Brian Carlstromae826982011-11-09 01:33:42 -08001902 Class* klass = it->second;
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08001903 kh.ChangeClass(klass);
Elliott Hughesc3b77c72011-12-15 20:56:48 -08001904 if (strcmp(kh.GetDescriptor(), descriptor) == 0 && klass->GetClassLoader() == class_loader) {
Brian Carlstromae826982011-11-09 01:33:42 -08001905 image_classes_.erase(it);
1906 return true;
1907 }
1908 }
1909 return false;
1910}
1911
Elliott Hughesc3b77c72011-12-15 20:56:48 -08001912Class* ClassLinker::LookupClass(const char* descriptor, const ClassLoader* class_loader) {
1913 size_t hash = Hash(descriptor);
Brian Carlstrom47d237a2011-10-18 15:08:33 -07001914 MutexLock mu(classes_lock_);
Ian Rogers5d76c432011-10-31 21:42:49 -07001915 // TODO: determine if its better to search classes_ or image_classes_ first
Brian Carlstrom07bb8552012-01-18 22:10:50 -08001916 Class* klass = LookupClass(descriptor, class_loader, hash, classes_);
1917 if (klass != NULL) {
1918 return klass;
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07001919 }
Brian Carlstrom07bb8552012-01-18 22:10:50 -08001920 return LookupClass(descriptor, class_loader, hash, image_classes_);
1921}
1922
1923Class* ClassLinker::LookupClass(const char* descriptor, const ClassLoader* class_loader,
1924 size_t hash, const Table& classes) {
1925 ClassHelper kh(NULL, this);
1926 typedef Table::const_iterator It; // TODO: C++0x auto
1927 for (It it = classes.lower_bound(hash), end = classes_.end(); it != end && it->first == hash; ++it) {
Ian Rogers5d76c432011-10-31 21:42:49 -07001928 Class* klass = it->second;
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08001929 kh.ChangeClass(klass);
Elliott Hughesc3b77c72011-12-15 20:56:48 -08001930 if (strcmp(descriptor, kh.GetDescriptor()) == 0 && klass->GetClassLoader() == class_loader) {
Brian Carlstrom07bb8552012-01-18 22:10:50 -08001931#ifndef NDEBUG
1932 for (++it; it != end && it->first == hash; ++it) {
Ian Rogersd85016c2012-02-03 18:27:34 -08001933 Class* klass2 = it->second;
1934 kh.ChangeClass(klass2);
1935 CHECK(!(strcmp(descriptor, kh.GetDescriptor()) == 0 && klass2->GetClassLoader() == class_loader))
Brian Carlstrom07bb8552012-01-18 22:10:50 -08001936 << PrettyClass(klass) << " " << klass << " " << klass->GetClassLoader() << " "
Ian Rogersd85016c2012-02-03 18:27:34 -08001937 << PrettyClass(klass2) << " " << klass2 << " " << klass2->GetClassLoader();
Brian Carlstrom07bb8552012-01-18 22:10:50 -08001938 }
1939#endif
Ian Rogers5d76c432011-10-31 21:42:49 -07001940 return klass;
1941 }
1942 }
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001943 return NULL;
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07001944}
1945
Elliott Hughesc3b77c72011-12-15 20:56:48 -08001946void ClassLinker::LookupClasses(const char* descriptor, std::vector<Class*>& classes) {
Elliott Hughes6fa602d2011-12-02 17:54:25 -08001947 classes.clear();
Elliott Hughesc3b77c72011-12-15 20:56:48 -08001948 size_t hash = Hash(descriptor);
Elliott Hughes6fa602d2011-12-02 17:54:25 -08001949 MutexLock mu(classes_lock_);
1950 typedef Table::const_iterator It; // TODO: C++0x auto
1951 // TODO: determine if its better to search classes_ or image_classes_ first
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08001952 ClassHelper kh(NULL, this);
Brian Carlstrom07bb8552012-01-18 22:10:50 -08001953 for (It it = classes_.lower_bound(hash), end = classes_.end(); it != end && it->first == hash; ++it) {
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08001954 Class* klass = it->second;
1955 kh.ChangeClass(klass);
Elliott Hughesc3b77c72011-12-15 20:56:48 -08001956 if (strcmp(descriptor, kh.GetDescriptor()) == 0) {
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08001957 classes.push_back(klass);
Elliott Hughes6fa602d2011-12-02 17:54:25 -08001958 }
1959 }
Brian Carlstrom07bb8552012-01-18 22:10:50 -08001960 for (It it = image_classes_.lower_bound(hash), end = classes_.end(); it != end && it->first == hash; ++it) {
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08001961 Class* klass = it->second;
1962 kh.ChangeClass(klass);
Elliott Hughesc3b77c72011-12-15 20:56:48 -08001963 if (strcmp(descriptor, kh.GetDescriptor()) == 0) {
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08001964 classes.push_back(klass);
Elliott Hughes6fa602d2011-12-02 17:54:25 -08001965 }
1966 }
1967}
1968
Ian Rogersc20a83e2012-01-18 18:15:32 -08001969#ifndef NDEBUG
1970static void CheckMethodsHaveGcMaps(Class* klass) {
1971 if (!Runtime::Current()->IsStarted()) {
1972 return;
1973 }
1974 for (size_t i = 0; i < klass->NumDirectMethods(); i++) {
1975 Method* method = klass->GetDirectMethod(i);
1976 if (!method->IsNative() && !method->IsAbstract()) {
1977 CHECK(method->GetGcMap() != NULL) << PrettyMethod(method);
1978 }
1979 }
1980 for (size_t i = 0; i < klass->NumVirtualMethods(); i++) {
1981 Method* method = klass->GetVirtualMethod(i);
1982 if (!method->IsNative() && !method->IsAbstract()) {
1983 CHECK(method->GetGcMap() != NULL) << PrettyMethod(method);
1984 }
1985 }
1986}
1987#else
Elliott Hughes1bac54f2012-03-16 12:48:31 -07001988static void CheckMethodsHaveGcMaps(Class*) {
Ian Rogersc20a83e2012-01-18 18:15:32 -08001989}
1990#endif
1991
jeffhao98eacac2011-09-14 16:11:53 -07001992void ClassLinker::VerifyClass(Class* klass) {
Brian Carlstrom9b5ee882012-02-28 09:48:54 -08001993 // TODO: assert that the monitor on the Class is held
Elliott Hughesd9c67be2012-02-02 19:54:06 -08001994 ObjectLock lock(klass);
1995
jeffhao98eacac2011-09-14 16:11:53 -07001996 if (klass->IsVerified()) {
1997 return;
1998 }
1999
Brian Carlstrom9b5ee882012-02-28 09:48:54 -08002000 // The class might already be erroneous if we attempted to verify a subclass
2001 if (klass->IsErroneous()) {
2002 ThrowEarlierClassFailure(klass);
2003 return;
2004 }
2005
Brian Carlstrome7d856b2012-01-11 18:10:55 -08002006 CHECK_EQ(klass->GetStatus(), Class::kStatusResolved) << PrettyClass(klass);
jeffhao98eacac2011-09-14 16:11:53 -07002007 klass->SetStatus(Class::kStatusVerifying);
jeffhao98eacac2011-09-14 16:11:53 -07002008
Ian Rogers1c5eb702012-02-01 09:18:34 -08002009 // Verify super class
2010 Class* super = klass->GetSuperClass();
2011 std::string error_msg;
2012 if (super != NULL) {
2013 // Acquire lock to prevent races on verifying the super class
2014 ObjectLock lock(super);
2015
2016 if (!super->IsVerified() && !super->IsErroneous()) {
2017 Runtime::Current()->GetClassLinker()->VerifyClass(super);
2018 }
2019 if (!super->IsVerified()) {
2020 error_msg = "Rejecting class ";
2021 error_msg += PrettyDescriptor(klass);
2022 error_msg += " that attempts to sub-class erroneous class ";
2023 error_msg += PrettyDescriptor(super);
2024 LOG(ERROR) << error_msg << " in " << klass->GetDexCache()->GetLocation()->ToModifiedUtf8();
2025 Thread* self = Thread::Current();
2026 SirtRef<Throwable> cause(self->GetException());
2027 if (cause.get() != NULL) {
2028 self->ClearException();
2029 }
2030 self->ThrowNewException("Ljava/lang/VerifyError;", error_msg.c_str());
2031 if (cause.get() != NULL) {
2032 self->GetException()->SetCause(cause.get());
2033 }
2034 CHECK_EQ(klass->GetStatus(), Class::kStatusVerifying) << PrettyDescriptor(klass);
2035 klass->SetStatus(Class::kStatusError);
2036 return;
2037 }
2038 }
2039
Brian Carlstrome7d856b2012-01-11 18:10:55 -08002040 // Try to use verification information from oat file, otherwise do runtime verification
2041 const DexFile& dex_file = FindDexFile(klass->GetDexCache());
Ian Rogers1c5eb702012-02-01 09:18:34 -08002042 if (VerifyClassUsingOatFile(dex_file, klass) ||
2043 verifier::DexVerifier::VerifyClass(klass, error_msg)) {
Ian Rogersc4762272012-02-01 15:55:55 -08002044 DCHECK(!Thread::Current()->IsExceptionPending());
Brian Carlstrome7d856b2012-01-11 18:10:55 -08002045 // Make sure all classes referenced by catch blocks are resolved
2046 ResolveClassExceptionHandlerTypes(dex_file, klass);
jeffhao5cfd6fb2011-09-27 13:54:29 -07002047 klass->SetStatus(Class::kStatusVerified);
Ian Rogersc20a83e2012-01-18 18:15:32 -08002048 // Sanity check that a verified class has GC maps on all methods
2049 CheckMethodsHaveGcMaps(klass);
jeffhao5cfd6fb2011-09-27 13:54:29 -07002050 } else {
Ian Rogers09f6b562012-01-31 21:58:52 -08002051 LOG(ERROR) << "Verification failed on class " << PrettyDescriptor(klass)
Ian Rogers1c5eb702012-02-01 09:18:34 -08002052 << " in " << klass->GetDexCache()->GetLocation()->ToModifiedUtf8()
2053 << " because: " << error_msg;
Elliott Hughesd9cdfe92011-10-06 16:09:04 -07002054 Thread* self = Thread::Current();
Ian Rogersc4762272012-02-01 15:55:55 -08002055 CHECK(!self->IsExceptionPending());
Ian Rogers1c5eb702012-02-01 09:18:34 -08002056 self->ThrowNewException("Ljava/lang/VerifyError;", error_msg.c_str());
2057 CHECK_EQ(klass->GetStatus(), Class::kStatusVerifying) << PrettyDescriptor(klass);
Elliott Hughesd9cdfe92011-10-06 16:09:04 -07002058 klass->SetStatus(Class::kStatusError);
jeffhao5cfd6fb2011-09-27 13:54:29 -07002059 }
jeffhao98eacac2011-09-14 16:11:53 -07002060}
2061
Brian Carlstrome7d856b2012-01-11 18:10:55 -08002062bool ClassLinker::VerifyClassUsingOatFile(const DexFile& dex_file, Class* klass) {
2063 if (!Runtime::Current()->IsStarted()) {
2064 return false;
2065 }
Elliott Hughesb3bd5f02012-03-08 21:05:27 -08002066 if (Runtime::Current()->UseCompileTimeClassPath()) {
Brian Carlstrome7d856b2012-01-11 18:10:55 -08002067 return false;
2068 }
Brian Carlstrom5b332c82012-02-01 15:02:31 -08002069 const OatFile* oat_file = FindOpenedOatFileForDexFile(dex_file);
2070 CHECK(oat_file != NULL) << dex_file.GetLocation() << " " << PrettyClass(klass);
Brian Carlstrome7d856b2012-01-11 18:10:55 -08002071 const OatFile::OatDexFile* oat_dex_file = oat_file->GetOatDexFile(dex_file.GetLocation());
Brian Carlstrom5b332c82012-02-01 15:02:31 -08002072 CHECK(oat_dex_file != NULL) << dex_file.GetLocation() << " " << PrettyClass(klass);
Brian Carlstrome7d856b2012-01-11 18:10:55 -08002073 const char* descriptor = ClassHelper(klass).GetDescriptor();
2074 uint32_t class_def_index;
2075 bool found = dex_file.FindClassDefIndex(descriptor, class_def_index);
Brian Carlstrom5b332c82012-02-01 15:02:31 -08002076 CHECK(found) << dex_file.GetLocation() << " " << PrettyClass(klass) << " " << descriptor;
Brian Carlstrome7d856b2012-01-11 18:10:55 -08002077 UniquePtr<const OatFile::OatClass> oat_class(oat_dex_file->GetOatClass(class_def_index));
Brian Carlstrom5b332c82012-02-01 15:02:31 -08002078 CHECK(oat_class.get() != NULL)
2079 << dex_file.GetLocation() << " " << PrettyClass(klass) << " " << descriptor;
Brian Carlstrome7d856b2012-01-11 18:10:55 -08002080 Class::Status status = oat_class->GetStatus();
Brian Carlstrome7d856b2012-01-11 18:10:55 -08002081 if (status == Class::kStatusVerified || status == Class::kStatusInitialized) {
2082 return true;
2083 }
Ian Rogersc4762272012-02-01 15:55:55 -08002084 if (status == Class::kStatusError) {
2085 // Compile time verification failed. Compile time verification can fail because we have
2086 // incomplete type information. Consider the following:
2087 // class ... {
2088 // Foo x;
2089 // .... () {
2090 // if (...) {
2091 // v1 gets assigned a type of resolved class Foo
2092 // } else {
2093 // v1 gets assigned a type of unresolved class Bar
2094 // }
2095 // iput x = v1
2096 // } }
2097 // when we merge v1 following the if-the-else it results in Conflict
2098 // (see verifier::RegType::Merge) as we can't know the type of Bar and we could possibly be
2099 // allowing an unsafe assignment to the field x in the iput (javac may have compiled this as
2100 // it knew Bar was a sub-class of Foo, but for us this may have been moved into a separate apk
2101 // at compile time).
2102 return false;
2103 }
Brian Carlstrome7d856b2012-01-11 18:10:55 -08002104 if (status == Class::kStatusNotReady) {
Ian Rogersc4762272012-02-01 15:55:55 -08002105 // Status is uninitialized if we couldn't determine the status at compile time, for example,
2106 // not loading the class.
2107 // TODO: when the verifier doesn't rely on Class-es failing to resolve/load the type hierarchy
2108 // isn't a problem and this case shouldn't occur
Brian Carlstrome7d856b2012-01-11 18:10:55 -08002109 return false;
2110 }
Brian Carlstrom5b332c82012-02-01 15:02:31 -08002111 LOG(FATAL) << "Unexpected class status: " << status
2112 << " " << dex_file.GetLocation() << " " << PrettyClass(klass) << " " << descriptor;
2113
Brian Carlstrome7d856b2012-01-11 18:10:55 -08002114 return false;
2115}
2116
2117void ClassLinker::ResolveClassExceptionHandlerTypes(const DexFile& dex_file, Class* klass) {
2118 for (size_t i = 0; i < klass->NumDirectMethods(); i++) {
2119 ResolveMethodExceptionHandlerTypes(dex_file, klass->GetDirectMethod(i));
2120 }
2121 for (size_t i = 0; i < klass->NumVirtualMethods(); i++) {
2122 ResolveMethodExceptionHandlerTypes(dex_file, klass->GetVirtualMethod(i));
2123 }
2124}
2125
2126void ClassLinker::ResolveMethodExceptionHandlerTypes(const DexFile& dex_file, Method* method) {
2127 // similar to DexVerifier::ScanTryCatchBlocks and dex2oat's ResolveExceptionsForMethod.
2128 const DexFile::CodeItem* code_item = dex_file.GetCodeItem(method->GetCodeItemOffset());
2129 if (code_item == NULL) {
2130 return; // native or abstract method
2131 }
2132 if (code_item->tries_size_ == 0) {
2133 return; // nothing to process
2134 }
2135 const byte* handlers_ptr = DexFile::GetCatchHandlerData(*code_item, 0);
2136 uint32_t handlers_size = DecodeUnsignedLeb128(&handlers_ptr);
2137 ClassLinker* linker = Runtime::Current()->GetClassLinker();
2138 for (uint32_t idx = 0; idx < handlers_size; idx++) {
2139 CatchHandlerIterator iterator(handlers_ptr);
2140 for (; iterator.HasNext(); iterator.Next()) {
2141 // Ensure exception types are resolved so that they don't need resolution to be delivered,
2142 // unresolved exception types will be ignored by exception delivery
2143 if (iterator.GetHandlerTypeIndex() != DexFile::kDexNoIndex16) {
2144 Class* exception_type = linker->ResolveType(iterator.GetHandlerTypeIndex(), method);
2145 if (exception_type == NULL) {
2146 DCHECK(Thread::Current()->IsExceptionPending());
2147 Thread::Current()->ClearException();
2148 }
2149 }
2150 }
2151 handlers_ptr = iterator.EndDataPointer();
2152 }
2153}
2154
Ian Rogersc2b44472011-12-14 21:17:17 -08002155static void CheckProxyConstructor(Method* constructor);
2156static void CheckProxyMethod(Method* method, SirtRef<Method>& prototype);
2157
Jesse Wilson95caa792011-10-12 18:14:17 -04002158Class* ClassLinker::CreateProxyClass(String* name, ObjectArray<Class>* interfaces,
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002159 ClassLoader* loader, ObjectArray<Method>* methods,
2160 ObjectArray<ObjectArray<Class> >* throws) {
Ian Rogersc2b44472011-12-14 21:17:17 -08002161 SirtRef<Class> klass(AllocClass(GetClassRoot(kJavaLangClass), sizeof(SynthesizedProxyClass)));
Brian Carlstrom40381fb2011-10-19 14:13:40 -07002162 CHECK(klass.get() != NULL);
Ian Rogersc2b44472011-12-14 21:17:17 -08002163 DCHECK(klass->GetClass() != NULL);
Jesse Wilson95caa792011-10-12 18:14:17 -04002164 klass->SetObjectSize(sizeof(Proxy));
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002165 klass->SetAccessFlags(kAccClassIsProxy | kAccPublic | kAccFinal);
Jesse Wilson95caa792011-10-12 18:14:17 -04002166 klass->SetClassLoader(loader);
Ian Rogersc2b44472011-12-14 21:17:17 -08002167 DCHECK_EQ(klass->GetPrimitiveType(), Primitive::kPrimNot);
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002168 klass->SetName(name);
Ian Rogers466bb252011-10-14 03:29:56 -07002169 Class* proxy_class = GetClassRoot(kJavaLangReflectProxy);
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002170 klass->SetDexCache(proxy_class->GetDexCache());
Ian Rogersc2b44472011-12-14 21:17:17 -08002171
2172 klass->SetStatus(Class::kStatusIdx);
2173
2174 klass->SetDexTypeIndex(DexFile::kDexNoIndex16);
2175
Elliott Hughes2ed52c42012-03-21 16:56:56 -07002176 // Instance fields are inherited, but we add a couple of static fields...
2177 klass->SetSFields(AllocObjectArray<Field>(2));
2178 // 1. Create a static field 'interfaces' that holds the _declared_ interfaces implemented by
2179 // our proxy, so Class.getInterfaces doesn't return the flattened set.
2180 SirtRef<Field> interfaces_sfield(AllocField());
2181 klass->SetStaticField(0, interfaces_sfield.get());
2182 interfaces_sfield->SetDexFieldIndex(0);
2183 interfaces_sfield->SetDeclaringClass(klass.get());
2184 interfaces_sfield->SetAccessFlags(kAccStatic | kAccPublic | kAccFinal);
2185 // 2. Create a static field 'throws' that holds exceptions thrown by our methods.
2186 SirtRef<Field> throws_sfield(AllocField());
2187 klass->SetStaticField(1, throws_sfield.get());
2188 throws_sfield->SetDexFieldIndex(1);
2189 throws_sfield->SetDeclaringClass(klass.get());
2190 throws_sfield->SetAccessFlags(kAccStatic | kAccPublic | kAccFinal);
Jesse Wilson95caa792011-10-12 18:14:17 -04002191
Ian Rogers466bb252011-10-14 03:29:56 -07002192 // Proxies have 1 direct method, the constructor
Jesse Wilson95caa792011-10-12 18:14:17 -04002193 klass->SetDirectMethods(AllocObjectArray<Method>(1));
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002194 klass->SetDirectMethod(0, CreateProxyConstructor(klass, proxy_class));
Jesse Wilson95caa792011-10-12 18:14:17 -04002195
Ian Rogers466bb252011-10-14 03:29:56 -07002196 // Create virtual method using specified prototypes
Jesse Wilson95caa792011-10-12 18:14:17 -04002197 size_t num_virtual_methods = methods->GetLength();
2198 klass->SetVirtualMethods(AllocObjectArray<Method>(num_virtual_methods));
2199 for (size_t i = 0; i < num_virtual_methods; ++i) {
Brian Carlstrom40381fb2011-10-19 14:13:40 -07002200 SirtRef<Method> prototype(methods->Get(i));
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002201 klass->SetVirtualMethod(i, CreateProxyMethod(klass, prototype));
Jesse Wilson95caa792011-10-12 18:14:17 -04002202 }
Ian Rogersc2b44472011-12-14 21:17:17 -08002203
2204 klass->SetSuperClass(proxy_class); // The super class is java.lang.reflect.Proxy
2205 klass->SetStatus(Class::kStatusLoaded); // Class is now effectively in the loaded state
2206 DCHECK(!Thread::Current()->IsExceptionPending());
2207
2208 // Link the fields and virtual methods, creating vtable and iftables
2209 if (!LinkClass(klass, interfaces)) {
Brian Carlstrom4d9716c2012-01-30 01:49:33 -08002210 klass->SetStatus(Class::kStatusError);
Jesse Wilson95caa792011-10-12 18:14:17 -04002211 return NULL;
2212 }
Elliott Hughes2ed52c42012-03-21 16:56:56 -07002213 interfaces_sfield->SetObject(NULL, interfaces);
2214 throws_sfield->SetObject(NULL, throws);
Ian Rogersc2b44472011-12-14 21:17:17 -08002215 klass->SetStatus(Class::kStatusInitialized);
2216
2217 // sanity checks
2218#ifndef NDEBUG
2219 bool debug = true;
2220#else
2221 bool debug = false;
2222#endif
2223 if (debug) {
2224 CHECK(klass->GetIFields() == NULL);
2225 CheckProxyConstructor(klass->GetDirectMethod(0));
2226 for (size_t i = 0; i < num_virtual_methods; ++i) {
2227 SirtRef<Method> prototype(methods->Get(i));
2228 CheckProxyMethod(klass->GetVirtualMethod(i), prototype);
2229 }
Elliott Hughes2ed52c42012-03-21 16:56:56 -07002230
2231 std::string interfaces_field_name(StringPrintf("java.lang.Class[] %s.interfaces",
2232 name->ToModifiedUtf8().c_str()));
2233 CHECK_EQ(PrettyField(klass->GetStaticField(0)), interfaces_field_name);
2234
2235 std::string throws_field_name(StringPrintf("java.lang.Class[][] %s.throws",
2236 name->ToModifiedUtf8().c_str()));
2237 CHECK_EQ(PrettyField(klass->GetStaticField(1)), throws_field_name);
Ian Rogersc2b44472011-12-14 21:17:17 -08002238
2239 SynthesizedProxyClass* synth_proxy_class = down_cast<SynthesizedProxyClass*>(klass.get());
Elliott Hughes2ed52c42012-03-21 16:56:56 -07002240 CHECK_EQ(synth_proxy_class->GetInterfaces(), interfaces);
Ian Rogersc2b44472011-12-14 21:17:17 -08002241 CHECK_EQ(synth_proxy_class->GetThrows(), throws);
2242 }
Brian Carlstrom40381fb2011-10-19 14:13:40 -07002243 return klass.get();
Jesse Wilson95caa792011-10-12 18:14:17 -04002244}
2245
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002246std::string ClassLinker::GetDescriptorForProxy(const Class* proxy_class) {
2247 DCHECK(proxy_class->IsProxyClass());
2248 String* name = proxy_class->GetName();
2249 DCHECK(name != NULL);
2250 return DotToDescriptor(name->ToModifiedUtf8().c_str());
2251}
2252
Ian Rogers16f93672012-02-14 12:29:06 -08002253Method* ClassLinker::FindMethodForProxy(const Class* proxy_class, const Method* proxy_method) {
2254 DCHECK(proxy_class->IsProxyClass());
2255 DCHECK(proxy_method->IsProxyMethod());
2256 // Locate the dex cache of the original interface/Object
2257 DexCache* dex_cache = NULL;
2258 {
2259 ObjectArray<Class>* resolved_types = proxy_method->GetDexCacheResolvedTypes();
2260 MutexLock mu(dex_lock_);
2261 for (size_t i = 0; i != dex_caches_.size(); ++i) {
2262 if (dex_caches_[i]->GetResolvedTypes() == resolved_types) {
2263 dex_cache = dex_caches_[i];
2264 break;
2265 }
2266 }
2267 }
2268 CHECK(dex_cache != NULL);
2269 uint32_t method_idx = proxy_method->GetDexMethodIndex();
2270 Method* resolved_method = dex_cache->GetResolvedMethod(method_idx);
2271 CHECK(resolved_method != NULL);
2272 return resolved_method;
2273}
2274
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002275
2276Method* ClassLinker::CreateProxyConstructor(SirtRef<Class>& klass, Class* proxy_class) {
Ian Rogers466bb252011-10-14 03:29:56 -07002277 // Create constructor for Proxy that must initialize h
Ian Rogers466bb252011-10-14 03:29:56 -07002278 ObjectArray<Method>* proxy_direct_methods = proxy_class->GetDirectMethods();
Jesse Wilsonecbce8f2011-10-21 19:57:36 -04002279 CHECK_EQ(proxy_direct_methods->GetLength(), 15);
Ian Rogers466bb252011-10-14 03:29:56 -07002280 Method* proxy_constructor = proxy_direct_methods->Get(2);
2281 // Clone the existing constructor of Proxy (our constructor would just invoke it so steal its
2282 // code_ too)
2283 Method* constructor = down_cast<Method*>(proxy_constructor->Clone());
2284 // Make this constructor public and fix the class to be our Proxy version
2285 constructor->SetAccessFlags((constructor->GetAccessFlags() & ~kAccProtected) | kAccPublic);
Brian Carlstrom40381fb2011-10-19 14:13:40 -07002286 constructor->SetDeclaringClass(klass.get());
Ian Rogersc2b44472011-12-14 21:17:17 -08002287 return constructor;
2288}
2289
2290static void CheckProxyConstructor(Method* constructor) {
Ian Rogers466bb252011-10-14 03:29:56 -07002291 CHECK(constructor->IsConstructor());
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002292 MethodHelper mh(constructor);
2293 CHECK_STREQ(mh.GetName(), "<init>");
Elliott Hughesba8eee12012-01-24 20:25:24 -08002294 CHECK_EQ(mh.GetSignature(), std::string("(Ljava/lang/reflect/InvocationHandler;)V"));
Ian Rogers466bb252011-10-14 03:29:56 -07002295 DCHECK(constructor->IsPublic());
Jesse Wilson95caa792011-10-12 18:14:17 -04002296}
2297
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002298Method* ClassLinker::CreateProxyMethod(SirtRef<Class>& klass, SirtRef<Method>& prototype) {
2299 // Ensure prototype is in dex cache so that we can use the dex cache to look up the overridden
2300 // prototype method
Ian Rogers16f93672012-02-14 12:29:06 -08002301 prototype->GetDeclaringClass()->GetDexCache()->SetResolvedMethod(prototype->GetDexMethodIndex(),
2302 prototype.get());
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002303 // We steal everything from the prototype (such as DexCache, invoke stub, etc.) then specialize
Ian Rogers466bb252011-10-14 03:29:56 -07002304 // as necessary
2305 Method* method = down_cast<Method*>(prototype->Clone());
2306
2307 // Set class to be the concrete proxy class and clear the abstract flag, modify exceptions to
2308 // the intersection of throw exceptions as defined in Proxy
Brian Carlstrom40381fb2011-10-19 14:13:40 -07002309 method->SetDeclaringClass(klass.get());
Ian Rogers466bb252011-10-14 03:29:56 -07002310 method->SetAccessFlags((method->GetAccessFlags() & ~kAccAbstract) | kAccFinal);
Jesse Wilson95caa792011-10-12 18:14:17 -04002311
Ian Rogers466bb252011-10-14 03:29:56 -07002312 // At runtime the method looks like a reference and argument saving method, clone the code
2313 // related parameters from this method.
2314 Method* refs_and_args = Runtime::Current()->GetCalleeSaveMethod(Runtime::kRefsAndArgs);
2315 method->SetCoreSpillMask(refs_and_args->GetCoreSpillMask());
2316 method->SetFpSpillMask(refs_and_args->GetFpSpillMask());
2317 method->SetFrameSizeInBytes(refs_and_args->GetFrameSizeInBytes());
2318 method->SetCode(reinterpret_cast<void*>(art_proxy_invoke_handler));
Ian Rogers16f93672012-02-14 12:29:06 -08002319
Ian Rogersc2b44472011-12-14 21:17:17 -08002320 return method;
2321}
Jesse Wilson95caa792011-10-12 18:14:17 -04002322
Ian Rogersc2b44472011-12-14 21:17:17 -08002323static void CheckProxyMethod(Method* method, SirtRef<Method>& prototype) {
Ian Rogers466bb252011-10-14 03:29:56 -07002324 // Basic sanity
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002325 CHECK(!prototype->IsFinal());
2326 CHECK(method->IsFinal());
2327 CHECK(!method->IsAbstract());
Ian Rogers19846512012-02-24 11:42:47 -08002328
2329 // The proxy method doesn't have its own dex cache or dex file and so it steals those of its
2330 // interface prototype. The exception to this are Constructors and the Class of the Proxy itself.
2331 CHECK_EQ(prototype->GetDexCacheStrings(), method->GetDexCacheStrings());
2332 CHECK_EQ(prototype->GetDexCacheResolvedMethods(), method->GetDexCacheResolvedMethods());
2333 CHECK_EQ(prototype->GetDexCacheResolvedTypes(), method->GetDexCacheResolvedTypes());
2334 CHECK_EQ(prototype->GetDexCacheInitializedStaticStorage(),
2335 method->GetDexCacheInitializedStaticStorage());
2336 CHECK_EQ(prototype->GetDexMethodIndex(), method->GetDexMethodIndex());
2337
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002338 MethodHelper mh(method);
Ian Rogers19846512012-02-24 11:42:47 -08002339 MethodHelper mh2(prototype.get());
2340 CHECK_STREQ(mh.GetName(), mh2.GetName());
2341 CHECK_STREQ(mh.GetShorty(), mh2.GetShorty());
Ian Rogers466bb252011-10-14 03:29:56 -07002342 // More complex sanity - via dex cache
Ian Rogers19846512012-02-24 11:42:47 -08002343 CHECK_EQ(mh.GetReturnType(), mh2.GetReturnType());
Jesse Wilson95caa792011-10-12 18:14:17 -04002344}
2345
Brian Carlstrom25c33252011-09-18 15:58:35 -07002346bool ClassLinker::InitializeClass(Class* klass, bool can_run_clinit) {
Brian Carlstromd1422f82011-09-28 11:37:09 -07002347 CHECK(klass->IsResolved() || klass->IsErroneous())
2348 << PrettyClass(klass) << " is " << klass->GetStatus();
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002349
Carl Shapirob5573532011-07-12 18:22:59 -07002350 Thread* self = Thread::Current();
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002351
Brian Carlstrom25c33252011-09-18 15:58:35 -07002352 Method* clinit = NULL;
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002353 {
Brian Carlstromd1422f82011-09-28 11:37:09 -07002354 // see JLS 3rd edition, 12.4.2 "Detailed Initialization Procedure" for the locking protocol
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002355 ObjectLock lock(klass);
2356
Brian Carlstromd1422f82011-09-28 11:37:09 -07002357 if (klass->GetStatus() == Class::kStatusInitialized) {
2358 return true;
2359 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002360
Brian Carlstromd1422f82011-09-28 11:37:09 -07002361 if (klass->IsErroneous()) {
2362 ThrowEarlierClassFailure(klass);
2363 return false;
2364 }
2365
2366 if (klass->GetStatus() == Class::kStatusResolved) {
jeffhao98eacac2011-09-14 16:11:53 -07002367 VerifyClass(klass);
2368 if (klass->GetStatus() != Class::kStatusVerified) {
Ian Rogers595799e2012-01-11 17:32:51 -08002369 CHECK(self->IsExceptionPending());
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002370 return false;
2371 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002372 }
2373
Brian Carlstrom25c33252011-09-18 15:58:35 -07002374 clinit = klass->FindDeclaredDirectMethod("<clinit>", "()V");
2375 if (clinit != NULL && !can_run_clinit) {
Brian Carlstromd1422f82011-09-28 11:37:09 -07002376 // if the class has a <clinit> but we can't run it during compilation,
Ian Rogers1bddec32012-02-04 12:27:34 -08002377 // don't bother going to kStatusInitializing. We return false so that
2378 // sub-classes don't believe this class is initialized.
Ian Rogers19846512012-02-24 11:42:47 -08002379 // Opportunistically link non-static methods, TODO: don't initialize and dirty pages
2380 // in second pass.
Ian Rogers1bddec32012-02-04 12:27:34 -08002381 return false;
Brian Carlstrom25c33252011-09-18 15:58:35 -07002382 }
2383
Brian Carlstromd1422f82011-09-28 11:37:09 -07002384 // If the class is kStatusInitializing, either this thread is
2385 // initializing higher up the stack or another thread has beat us
2386 // to initializing and we need to wait. Either way, this
2387 // invocation of InitializeClass will not be responsible for
2388 // running <clinit> and will return.
2389 if (klass->GetStatus() == Class::kStatusInitializing) {
Elliott Hughes005ab2e2011-09-11 17:15:31 -07002390 // We caught somebody else in the act; was it us?
Elliott Hughesdcc24742011-09-07 14:02:44 -07002391 if (klass->GetClinitThreadId() == self->GetTid()) {
Brian Carlstromd1422f82011-09-28 11:37:09 -07002392 // Yes. That's fine. Return so we can continue initializing.
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002393 return true;
2394 }
Brian Carlstromd1422f82011-09-28 11:37:09 -07002395 // No. That's fine. Wait for another thread to finish initializing.
2396 return WaitForInitializeClass(klass, self, lock);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002397 }
2398
2399 if (!ValidateSuperClassDescriptors(klass)) {
2400 klass->SetStatus(Class::kStatusError);
2401 return false;
2402 }
2403
Brian Carlstrome7d856b2012-01-11 18:10:55 -08002404 DCHECK_EQ(klass->GetStatus(), Class::kStatusVerified) << PrettyClass(klass);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002405
Elliott Hughesdcc24742011-09-07 14:02:44 -07002406 klass->SetClinitThreadId(self->GetTid());
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002407 klass->SetStatus(Class::kStatusInitializing);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002408 }
2409
Elliott Hughes83df2ac2011-10-11 16:37:54 -07002410 uint64_t t0 = NanoTime();
2411
Brian Carlstrom25c33252011-09-18 15:58:35 -07002412 if (!InitializeSuperClass(klass, can_run_clinit)) {
Ian Rogers1bddec32012-02-04 12:27:34 -08002413 // Super class initialization failed, this can be because we can't run
2414 // super-class class initializers in which case we'll be verified.
2415 // Otherwise this class is erroneous.
2416 if (!can_run_clinit) {
2417 CHECK(klass->IsVerified());
2418 } else {
2419 CHECK(klass->IsErroneous());
2420 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002421 return false;
2422 }
2423
2424 InitializeStaticFields(klass);
2425
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002426 if (clinit != NULL) {
Elliott Hughesf5ecf062011-09-06 17:37:59 -07002427 clinit->Invoke(self, NULL, NULL, NULL);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002428 }
2429
Ian Rogers19846512012-02-24 11:42:47 -08002430 FixupStaticTrampolines(klass);
2431
Elliott Hughes83df2ac2011-10-11 16:37:54 -07002432 uint64_t t1 = NanoTime();
2433
Ian Rogersbdfb1a52012-01-12 14:05:22 -08002434 bool success = true;
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002435 {
2436 ObjectLock lock(klass);
2437
2438 if (self->IsExceptionPending()) {
Elliott Hughes4d0207c2011-10-03 19:14:34 -07002439 WrapExceptionInInitializer();
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002440 klass->SetStatus(Class::kStatusError);
Ian Rogersbdfb1a52012-01-12 14:05:22 -08002441 success = false;
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002442 } else {
Elliott Hughes83df2ac2011-10-11 16:37:54 -07002443 RuntimeStats* global_stats = Runtime::Current()->GetStats();
2444 RuntimeStats* thread_stats = self->GetStats();
2445 ++global_stats->class_init_count;
2446 ++thread_stats->class_init_count;
2447 global_stats->class_init_time_ns += (t1 - t0);
2448 thread_stats->class_init_time_ns += (t1 - t0);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002449 klass->SetStatus(Class::kStatusInitialized);
Elliott Hughes4dd9b4d2011-12-12 18:29:24 -08002450 if (VLOG_IS_ON(class_linker)) {
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002451 ClassHelper kh(klass);
2452 LOG(INFO) << "Initialized class " << kh.GetDescriptor() << " from " << kh.GetLocation();
Brian Carlstromae826982011-11-09 01:33:42 -08002453 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002454 }
2455 lock.NotifyAll();
2456 }
Ian Rogersbdfb1a52012-01-12 14:05:22 -08002457 return success;
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002458}
2459
Brian Carlstromd1422f82011-09-28 11:37:09 -07002460bool ClassLinker::WaitForInitializeClass(Class* klass, Thread* self, ObjectLock& lock) {
2461 while (true) {
Elliott Hughesd9cdfe92011-10-06 16:09:04 -07002462 CHECK(!self->IsExceptionPending()) << PrettyTypeOf(self->GetException());
Brian Carlstromd1422f82011-09-28 11:37:09 -07002463 lock.Wait();
2464
2465 // When we wake up, repeat the test for init-in-progress. If
2466 // there's an exception pending (only possible if
2467 // "interruptShouldThrow" was set), bail out.
2468 if (self->IsExceptionPending()) {
Elliott Hughes4d0207c2011-10-03 19:14:34 -07002469 WrapExceptionInInitializer();
Brian Carlstromd1422f82011-09-28 11:37:09 -07002470 klass->SetStatus(Class::kStatusError);
2471 return false;
2472 }
2473 // Spurious wakeup? Go back to waiting.
2474 if (klass->GetStatus() == Class::kStatusInitializing) {
2475 continue;
2476 }
2477 if (klass->IsErroneous()) {
2478 // The caller wants an exception, but it was thrown in a
2479 // different thread. Synthesize one here.
Brian Carlstromdf143242011-10-10 18:05:34 -07002480 ThrowNoClassDefFoundError("<clinit> failed for class %s; see exception in other thread",
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002481 PrettyDescriptor(klass).c_str());
Brian Carlstromd1422f82011-09-28 11:37:09 -07002482 return false;
2483 }
2484 if (klass->IsInitialized()) {
2485 return true;
2486 }
2487 LOG(FATAL) << "Unexpected class status. " << PrettyClass(klass) << " is " << klass->GetStatus();
2488 }
2489 LOG(FATAL) << "Not Reached" << PrettyClass(klass);
2490}
2491
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002492bool ClassLinker::ValidateSuperClassDescriptors(const Class* klass) {
2493 if (klass->IsInterface()) {
2494 return true;
2495 }
2496 // begin with the methods local to the superclass
2497 if (klass->HasSuperClass() &&
2498 klass->GetClassLoader() != klass->GetSuperClass()->GetClassLoader()) {
2499 const Class* super = klass->GetSuperClass();
Ian Rogers595799e2012-01-11 17:32:51 -08002500 for (int i = super->GetVTable()->GetLength() - 1; i >= 0; --i) {
2501 const Method* method = klass->GetVTable()->Get(i);
2502 if (method != super->GetVTable()->Get(i) &&
2503 !IsSameMethodSignatureInDifferentClassContexts(method, super, klass)) {
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002504 ThrowLinkageError("Class %s method %s resolves differently in superclass %s",
2505 PrettyDescriptor(klass).c_str(), PrettyMethod(method).c_str(),
2506 PrettyDescriptor(super).c_str());
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002507 return false;
2508 }
2509 }
2510 }
Brian Carlstrom4b620ff2011-09-11 01:11:01 -07002511 for (int32_t i = 0; i < klass->GetIfTableCount(); ++i) {
2512 InterfaceEntry* interface_entry = klass->GetIfTable()->Get(i);
2513 Class* interface = interface_entry->GetInterface();
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002514 if (klass->GetClassLoader() != interface->GetClassLoader()) {
2515 for (size_t j = 0; j < interface->NumVirtualMethods(); ++j) {
Brian Carlstrom4b620ff2011-09-11 01:11:01 -07002516 const Method* method = interface_entry->GetMethodArray()->Get(j);
Ian Rogers595799e2012-01-11 17:32:51 -08002517 if (!IsSameMethodSignatureInDifferentClassContexts(method, interface,
2518 method->GetDeclaringClass())) {
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002519 ThrowLinkageError("Class %s method %s resolves differently in interface %s",
2520 PrettyDescriptor(method->GetDeclaringClass()).c_str(),
2521 PrettyMethod(method).c_str(),
2522 PrettyDescriptor(interface).c_str());
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002523 return false;
2524 }
2525 }
2526 }
2527 }
2528 return true;
2529}
2530
Ian Rogers595799e2012-01-11 17:32:51 -08002531// Returns true if classes referenced by the signature of the method are the
2532// same classes in klass1 as they are in klass2.
2533bool ClassLinker::IsSameMethodSignatureInDifferentClassContexts(const Method* method,
2534 const Class* klass1,
2535 const Class* klass2) {
Ian Rogers9074b992011-10-26 17:41:55 -07002536 if (klass1 == klass2) {
2537 return true;
Brian Carlstrome10b6972011-09-26 13:49:03 -07002538 }
Brian Carlstrom27ec9612011-09-19 20:20:38 -07002539 const DexFile& dex_file = FindDexFile(method->GetDeclaringClass()->GetDexCache());
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002540 const DexFile::ProtoId& proto_id =
2541 dex_file.GetMethodPrototype(dex_file.GetMethodId(method->GetDexMethodIndex()));
Ian Rogers0571d352011-11-03 19:51:38 -07002542 for (DexFileParameterIterator it(dex_file, proto_id); it.HasNext(); it.Next()) {
2543 const char* descriptor = it.GetDescriptor();
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002544 if (descriptor == NULL) {
2545 break;
2546 }
2547 if (descriptor[0] == 'L' || descriptor[0] == '[') {
2548 // Found a non-primitive type.
Ian Rogers595799e2012-01-11 17:32:51 -08002549 if (!IsSameDescriptorInDifferentClassContexts(descriptor, klass1, klass2)) {
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002550 return false;
2551 }
2552 }
2553 }
2554 // Check the return type
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07002555 const char* descriptor = dex_file.GetReturnTypeDescriptor(proto_id);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002556 if (descriptor[0] == 'L' || descriptor[0] == '[') {
Ian Rogers595799e2012-01-11 17:32:51 -08002557 if (!IsSameDescriptorInDifferentClassContexts(descriptor, klass1, klass2)) {
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002558 return false;
2559 }
2560 }
2561 return true;
2562}
2563
Ian Rogers595799e2012-01-11 17:32:51 -08002564// Returns true if the descriptor resolves to the same class in the context of klass1 and klass2.
2565bool ClassLinker::IsSameDescriptorInDifferentClassContexts(const char* descriptor,
2566 const Class* klass1,
2567 const Class* klass2) {
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002568 CHECK(descriptor != NULL);
2569 CHECK(klass1 != NULL);
2570 CHECK(klass2 != NULL);
Ian Rogers9074b992011-10-26 17:41:55 -07002571 if (klass1 == klass2) {
2572 return true;
2573 }
Brian Carlstrom578bbdc2011-07-21 14:07:47 -07002574 Class* found1 = FindClass(descriptor, klass1->GetClassLoader());
Ian Rogers595799e2012-01-11 17:32:51 -08002575 if (found1 == NULL) {
Carl Shapirob5573532011-07-12 18:22:59 -07002576 Thread::Current()->ClearException();
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002577 }
Ian Rogers595799e2012-01-11 17:32:51 -08002578 Class* found2 = FindClass(descriptor, klass2->GetClassLoader());
2579 if (found2 == NULL) {
2580 Thread::Current()->ClearException();
2581 }
2582 return found1 == found2;
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002583}
2584
Brian Carlstrom25c33252011-09-18 15:58:35 -07002585bool ClassLinker::InitializeSuperClass(Class* klass, bool can_run_clinit) {
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002586 CHECK(klass != NULL);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002587 if (!klass->IsInterface() && klass->HasSuperClass()) {
2588 Class* super_class = klass->GetSuperClass();
2589 if (super_class->GetStatus() != Class::kStatusInitialized) {
2590 CHECK(!super_class->IsInterface());
Elliott Hughes5f791332011-09-15 17:45:30 -07002591 Thread* self = Thread::Current();
2592 klass->MonitorEnter(self);
Brian Carlstrom25c33252011-09-18 15:58:35 -07002593 bool super_initialized = InitializeClass(super_class, can_run_clinit);
Elliott Hughes5f791332011-09-15 17:45:30 -07002594 klass->MonitorExit(self);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002595 // TODO: check for a pending exception
2596 if (!super_initialized) {
Brian Carlstrom25c33252011-09-18 15:58:35 -07002597 if (!can_run_clinit) {
Brian Carlstrom4d9716c2012-01-30 01:49:33 -08002598 // Don't set status to error when we can't run <clinit>.
2599 CHECK_EQ(klass->GetStatus(), Class::kStatusInitializing) << PrettyClass(klass);
2600 klass->SetStatus(Class::kStatusVerified);
2601 return false;
Brian Carlstrom25c33252011-09-18 15:58:35 -07002602 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002603 klass->SetStatus(Class::kStatusError);
2604 klass->NotifyAll();
2605 return false;
2606 }
2607 }
2608 }
2609 return true;
2610}
2611
Brian Carlstrom25c33252011-09-18 15:58:35 -07002612bool ClassLinker::EnsureInitialized(Class* c, bool can_run_clinit) {
Elliott Hughese84278b2012-03-22 10:06:53 -07002613 if (PrettyClass(c).find("TestClass") != std::string::npos) {
2614 LOG(INFO) << "ClassLinker::EnsureInitialized " << PrettyClass(c);
2615 }
Elliott Hughesf4c21c92011-08-19 17:31:31 -07002616 CHECK(c != NULL);
2617 if (c->IsInitialized()) {
2618 return true;
2619 }
2620
Elliott Hughes5f791332011-09-15 17:45:30 -07002621 Thread* self = Thread::Current();
Elliott Hughes4681c802011-09-25 18:04:37 -07002622 ScopedThreadStateChange tsc(self, Thread::kRunnable);
Ian Rogers595799e2012-01-11 17:32:51 -08002623 bool success = InitializeClass(c, can_run_clinit);
2624 if (!success) {
Ian Rogers1bddec32012-02-04 12:27:34 -08002625 CHECK(self->IsExceptionPending() || !can_run_clinit) << PrettyClass(c);
Ian Rogers595799e2012-01-11 17:32:51 -08002626 }
2627 return success;
Elliott Hughesf4c21c92011-08-19 17:31:31 -07002628}
2629
Elliott Hughes5fe594f2011-09-08 12:33:17 -07002630void ClassLinker::ConstructFieldMap(const DexFile& dex_file, const DexFile::ClassDef& dex_class_def,
Ian Rogers0571d352011-11-03 19:51:38 -07002631 Class* c, std::map<uint32_t, Field*>& field_map) {
Elliott Hughes5fe594f2011-09-08 12:33:17 -07002632 const ClassLoader* cl = c->GetClassLoader();
2633 const byte* class_data = dex_file.GetClassData(dex_class_def);
Ian Rogers0571d352011-11-03 19:51:38 -07002634 ClassDataItemIterator it(dex_file, class_data);
2635 for (size_t i = 0; it.HasNextStaticField(); i++, it.Next()) {
2636 field_map[i] = ResolveField(dex_file, it.GetMemberIndex(), c->GetDexCache(), cl, true);
Elliott Hughes5fe594f2011-09-08 12:33:17 -07002637 }
2638}
2639
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002640void ClassLinker::InitializeStaticFields(Class* klass) {
Carl Shapiro5fafe2b2011-07-09 15:34:41 -07002641 size_t num_static_fields = klass->NumStaticFields();
2642 if (num_static_fields == 0) {
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002643 return;
Carl Shapiro5fafe2b2011-07-09 15:34:41 -07002644 }
Brian Carlstromf615a612011-07-23 12:50:34 -07002645 DexCache* dex_cache = klass->GetDexCache();
Brian Carlstrom4873d462011-08-21 15:23:39 -07002646 // TODO: this seems like the wrong check. do we really want !IsPrimitive && !IsArray?
Brian Carlstromf615a612011-07-23 12:50:34 -07002647 if (dex_cache == NULL) {
Carl Shapiro5fafe2b2011-07-09 15:34:41 -07002648 return;
2649 }
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002650 ClassHelper kh(klass);
2651 const DexFile::ClassDef* dex_class_def = kh.GetClassDef();
Brian Carlstromf615a612011-07-23 12:50:34 -07002652 CHECK(dex_class_def != NULL);
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002653 const DexFile& dex_file = kh.GetDexFile();
Ian Rogers0571d352011-11-03 19:51:38 -07002654 EncodedStaticFieldValueIterator it(dex_file, dex_cache, this, *dex_class_def);
Elliott Hughes5fe594f2011-09-08 12:33:17 -07002655
Ian Rogers0571d352011-11-03 19:51:38 -07002656 if (it.HasNext()) {
2657 // We reordered the fields, so we need to be able to map the field indexes to the right fields.
2658 std::map<uint32_t, Field*> field_map;
2659 ConstructFieldMap(dex_file, *dex_class_def, klass, field_map);
2660 for (size_t i = 0; it.HasNext(); i++, it.Next()) {
2661 it.ReadValueToField(field_map[i]);
Carl Shapiro5fafe2b2011-07-09 15:34:41 -07002662 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002663 }
2664}
2665
Ian Rogersc2b44472011-12-14 21:17:17 -08002666bool ClassLinker::LinkClass(SirtRef<Class>& klass, ObjectArray<Class>* interfaces) {
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002667 CHECK_EQ(Class::kStatusLoaded, klass->GetStatus());
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002668 if (!LinkSuperClass(klass)) {
2669 return false;
2670 }
Ian Rogersc2b44472011-12-14 21:17:17 -08002671 if (!LinkMethods(klass, interfaces)) {
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002672 return false;
2673 }
2674 if (!LinkInstanceFields(klass)) {
2675 return false;
2676 }
Brian Carlstrom4873d462011-08-21 15:23:39 -07002677 if (!LinkStaticFields(klass)) {
2678 return false;
2679 }
2680 CreateReferenceInstanceOffsets(klass);
2681 CreateReferenceStaticOffsets(klass);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002682 CHECK_EQ(Class::kStatusLoaded, klass->GetStatus());
2683 klass->SetStatus(Class::kStatusResolved);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002684 return true;
2685}
2686
Brian Carlstrom40381fb2011-10-19 14:13:40 -07002687bool ClassLinker::LoadSuperAndInterfaces(SirtRef<Class>& klass, const DexFile& dex_file) {
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002688 CHECK_EQ(Class::kStatusIdx, klass->GetStatus());
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002689 StringPiece descriptor(dex_file.StringByTypeIdx(klass->GetDexTypeIndex()));
2690 const DexFile::ClassDef* class_def = dex_file.FindClassDef(descriptor);
Ian Rogerscab01012012-01-10 17:35:46 -08002691 CHECK(class_def != NULL);
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002692 uint16_t super_class_idx = class_def->superclass_idx_;
2693 if (super_class_idx != DexFile::kDexNoIndex16) {
2694 Class* super_class = ResolveType(dex_file, super_class_idx, klass.get());
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002695 if (super_class == NULL) {
Brian Carlstrom65ca0772011-09-24 16:03:08 -07002696 DCHECK(Thread::Current()->IsExceptionPending());
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002697 return false;
2698 }
Ian Rogersbe125a92012-01-11 15:19:49 -08002699 // Verify
2700 if (!klass->CanAccess(super_class)) {
2701 Thread::Current()->ThrowNewExceptionF("Ljava/lang/IllegalAccessError;",
2702 "Class %s extended by class %s is inaccessible",
2703 PrettyDescriptor(super_class).c_str(),
2704 PrettyDescriptor(klass.get()).c_str());
2705 return false;
2706 }
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002707 klass->SetSuperClass(super_class);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002708 }
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002709 const DexFile::TypeList* interfaces = dex_file.GetInterfacesList(*class_def);
2710 if (interfaces != NULL) {
2711 for (size_t i = 0; i < interfaces->Size(); i++) {
2712 uint16_t idx = interfaces->GetTypeItem(i).type_idx_;
2713 Class* interface = ResolveType(dex_file, idx, klass.get());
2714 if (interface == NULL) {
2715 DCHECK(Thread::Current()->IsExceptionPending());
2716 return false;
2717 }
2718 // Verify
2719 if (!klass->CanAccess(interface)) {
2720 // TODO: the RI seemed to ignore this in my testing.
2721 Thread::Current()->ThrowNewExceptionF("Ljava/lang/IllegalAccessError;",
2722 "Interface %s implemented by class %s is inaccessible",
2723 PrettyDescriptor(interface).c_str(),
2724 PrettyDescriptor(klass.get()).c_str());
2725 return false;
2726 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002727 }
2728 }
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07002729 // Mark the class as loaded.
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002730 klass->SetStatus(Class::kStatusLoaded);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002731 return true;
2732}
2733
Brian Carlstrom40381fb2011-10-19 14:13:40 -07002734bool ClassLinker::LinkSuperClass(SirtRef<Class>& klass) {
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002735 CHECK(!klass->IsPrimitive());
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002736 Class* super = klass->GetSuperClass();
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002737 if (klass.get() == GetClassRoot(kJavaLangObject)) {
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002738 if (super != NULL) {
Elliott Hughes5cb5ad22011-10-02 12:13:39 -07002739 Thread::Current()->ThrowNewExceptionF("Ljava/lang/ClassFormatError;",
Elliott Hughes4a2b4172011-09-20 17:08:25 -07002740 "java.lang.Object must not have a superclass");
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002741 return false;
2742 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002743 return true;
2744 }
2745 if (super == NULL) {
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002746 ThrowLinkageError("No superclass defined for class %s", PrettyDescriptor(klass.get()).c_str());
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002747 return false;
2748 }
2749 // Verify
Elliott Hughes4a2b4172011-09-20 17:08:25 -07002750 if (super->IsFinal() || super->IsInterface()) {
Brian Carlstrom4d9716c2012-01-30 01:49:33 -08002751 Thread* self = Thread::Current();
2752 self->ThrowNewExceptionF("Ljava/lang/IncompatibleClassChangeError;",
Elliott Hughese555dc02011-09-25 10:46:35 -07002753 "Superclass %s of %s is %s",
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002754 PrettyDescriptor(super).c_str(),
2755 PrettyDescriptor(klass.get()).c_str(),
Elliott Hughes4a2b4172011-09-20 17:08:25 -07002756 super->IsFinal() ? "declared final" : "an interface");
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002757 return false;
2758 }
2759 if (!klass->CanAccess(super)) {
Elliott Hughes5cb5ad22011-10-02 12:13:39 -07002760 Thread::Current()->ThrowNewExceptionF("Ljava/lang/IllegalAccessError;",
Elliott Hughese555dc02011-09-25 10:46:35 -07002761 "Superclass %s is inaccessible by %s",
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002762 PrettyDescriptor(super).c_str(),
2763 PrettyDescriptor(klass.get()).c_str());
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002764 return false;
2765 }
Elliott Hughes20cde902011-10-04 17:37:27 -07002766
2767 // Inherit kAccClassIsFinalizable from the superclass in case this class doesn't override finalize.
2768 if (super->IsFinalizable()) {
2769 klass->SetFinalizable();
2770 }
2771
Elliott Hughes2da50362011-10-10 16:57:08 -07002772 // Inherit reference flags (if any) from the superclass.
2773 int reference_flags = (super->GetAccessFlags() & kAccReferenceFlagsMask);
2774 if (reference_flags != 0) {
2775 klass->SetAccessFlags(klass->GetAccessFlags() | reference_flags);
2776 }
Elliott Hughes72ee0ae2011-10-10 17:31:28 -07002777 // Disallow custom direct subclasses of java.lang.ref.Reference.
Elliott Hughesbf61ba32011-10-11 10:53:09 -07002778 if (init_done_ && super == GetClassRoot(kJavaLangRefReference)) {
Elliott Hughes72ee0ae2011-10-10 17:31:28 -07002779 ThrowLinkageError("Class %s attempts to subclass java.lang.ref.Reference, which is not allowed",
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002780 PrettyDescriptor(klass.get()).c_str());
Elliott Hughes72ee0ae2011-10-10 17:31:28 -07002781 return false;
2782 }
Elliott Hughes2da50362011-10-10 16:57:08 -07002783
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002784#ifndef NDEBUG
2785 // Ensure super classes are fully resolved prior to resolving fields..
2786 while (super != NULL) {
Elliott Hughes5fe594f2011-09-08 12:33:17 -07002787 CHECK(super->IsResolved());
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002788 super = super->GetSuperClass();
2789 }
2790#endif
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002791 return true;
2792}
2793
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002794// Populate the class vtable and itable. Compute return type indices.
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002795bool ClassLinker::LinkMethods(SirtRef<Class>& klass, ObjectArray<Class>* interfaces) {
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002796 if (klass->IsInterface()) {
2797 // No vtable.
2798 size_t count = klass->NumVirtualMethods();
2799 if (!IsUint(16, count)) {
Elliott Hughes92cb4982011-12-16 16:57:28 -08002800 ThrowClassFormatError("Too many methods on interface: %zd", count);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002801 return false;
2802 }
Carl Shapiro565f5072011-07-10 13:39:43 -07002803 for (size_t i = 0; i < count; ++i) {
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002804 klass->GetVirtualMethodDuringLinking(i)->SetMethodIndex(i);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002805 }
jeffhaobdb76512011-09-07 11:43:16 -07002806 // Link interface method tables
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002807 return LinkInterfaceMethods(klass, interfaces);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002808 } else {
Elliott Hughesbc258fa2011-10-06 14:45:21 -07002809 // Link virtual and interface method tables
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002810 return LinkVirtualMethods(klass) && LinkInterfaceMethods(klass, interfaces);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002811 }
2812 return true;
2813}
2814
Brian Carlstrom40381fb2011-10-19 14:13:40 -07002815bool ClassLinker::LinkVirtualMethods(SirtRef<Class>& klass) {
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002816 if (klass->HasSuperClass()) {
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002817 uint32_t max_count = klass->NumVirtualMethods() + klass->GetSuperClass()->GetVTable()->GetLength();
2818 size_t actual_count = klass->GetSuperClass()->GetVTable()->GetLength();
Brian Carlstrom4a96b602011-07-26 16:40:23 -07002819 CHECK_LE(actual_count, max_count);
Brian Carlstroma40f9bc2011-07-26 21:26:07 -07002820 // TODO: do not assign to the vtable field until it is fully constructed.
Ian Rogers30fab402012-01-23 15:43:46 -08002821 SirtRef<ObjectArray<Method> > vtable(klass->GetSuperClass()->GetVTable()->CopyOf(max_count));
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002822 // See if any of our virtual methods override the superclass.
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002823 MethodHelper local_mh(NULL, this);
2824 MethodHelper super_mh(NULL, this);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002825 for (size_t i = 0; i < klass->NumVirtualMethods(); ++i) {
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002826 Method* local_method = klass->GetVirtualMethodDuringLinking(i);
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002827 local_mh.ChangeMethod(local_method);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002828 size_t j = 0;
Brian Carlstrom4a96b602011-07-26 16:40:23 -07002829 for (; j < actual_count; ++j) {
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002830 Method* super_method = vtable->Get(j);
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002831 super_mh.ChangeMethod(super_method);
2832 if (local_mh.HasSameNameAndSignature(&super_mh)) {
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002833 // Verify
2834 if (super_method->IsFinal()) {
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002835 MethodHelper mh(local_method);
Elliott Hughese555dc02011-09-25 10:46:35 -07002836 ThrowLinkageError("Method %s.%s overrides final method in class %s",
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002837 PrettyDescriptor(klass.get()).c_str(),
2838 mh.GetName(), mh.GetDeclaringClassDescriptor());
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002839 return false;
2840 }
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002841 vtable->Set(j, local_method);
2842 local_method->SetMethodIndex(j);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002843 break;
2844 }
2845 }
Brian Carlstrom4a96b602011-07-26 16:40:23 -07002846 if (j == actual_count) {
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002847 // Not overriding, append.
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002848 vtable->Set(actual_count, local_method);
2849 local_method->SetMethodIndex(actual_count);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002850 actual_count += 1;
2851 }
2852 }
2853 if (!IsUint(16, actual_count)) {
Elliott Hughes92cb4982011-12-16 16:57:28 -08002854 ThrowClassFormatError("Too many methods defined on class: %zd", actual_count);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002855 return false;
2856 }
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002857 // Shrink vtable if possible
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002858 CHECK_LE(actual_count, max_count);
2859 if (actual_count < max_count) {
Ian Rogers30fab402012-01-23 15:43:46 -08002860 vtable.reset(vtable->CopyOf(actual_count));
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002861 }
Ian Rogers30fab402012-01-23 15:43:46 -08002862 klass->SetVTable(vtable.get());
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002863 } else {
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002864 CHECK(klass.get() == GetClassRoot(kJavaLangObject));
Brian Carlstroma40f9bc2011-07-26 21:26:07 -07002865 uint32_t num_virtual_methods = klass->NumVirtualMethods();
Brian Carlstroma40f9bc2011-07-26 21:26:07 -07002866 if (!IsUint(16, num_virtual_methods)) {
Elliott Hughese555dc02011-09-25 10:46:35 -07002867 ThrowClassFormatError("Too many methods: %d", num_virtual_methods);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002868 return false;
2869 }
Brian Carlstrom40381fb2011-10-19 14:13:40 -07002870 SirtRef<ObjectArray<Method> > vtable(AllocObjectArray<Method>(num_virtual_methods));
Brian Carlstroma40f9bc2011-07-26 21:26:07 -07002871 for (size_t i = 0; i < num_virtual_methods; ++i) {
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002872 Method* virtual_method = klass->GetVirtualMethodDuringLinking(i);
2873 vtable->Set(i, virtual_method);
2874 virtual_method->SetMethodIndex(i & 0xFFFF);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002875 }
Brian Carlstrom40381fb2011-10-19 14:13:40 -07002876 klass->SetVTable(vtable.get());
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002877 }
2878 return true;
2879}
2880
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002881bool ClassLinker::LinkInterfaceMethods(SirtRef<Class>& klass, ObjectArray<Class>* interfaces) {
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002882 size_t super_ifcount;
2883 if (klass->HasSuperClass()) {
Brian Carlstrom4b620ff2011-09-11 01:11:01 -07002884 super_ifcount = klass->GetSuperClass()->GetIfTableCount();
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002885 } else {
2886 super_ifcount = 0;
2887 }
Brian Carlstrom913af1b2011-07-23 21:41:13 -07002888 size_t ifcount = super_ifcount;
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002889 ClassHelper kh(klass.get(), this);
2890 uint32_t num_interfaces = interfaces == NULL ? kh.NumInterfaces() : interfaces->GetLength();
2891 ifcount += num_interfaces;
2892 for (size_t i = 0; i < num_interfaces; i++) {
2893 Class* interface = interfaces == NULL ? kh.GetInterface(i) : interfaces->Get(i);
2894 ifcount += interface->GetIfTableCount();
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002895 }
Brian Carlstrom913af1b2011-07-23 21:41:13 -07002896 if (ifcount == 0) {
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002897 // TODO: enable these asserts with klass status validation
Elliott Hughesf5a7a472011-10-07 14:31:02 -07002898 // DCHECK_EQ(klass->GetIfTableCount(), 0);
Brian Carlstrom4b620ff2011-09-11 01:11:01 -07002899 // DCHECK(klass->GetIfTable() == NULL);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002900 return true;
2901 }
Brian Carlstrom40381fb2011-10-19 14:13:40 -07002902 SirtRef<ObjectArray<InterfaceEntry> > iftable(AllocObjectArray<InterfaceEntry>(ifcount));
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002903 if (super_ifcount != 0) {
Brian Carlstrom4b620ff2011-09-11 01:11:01 -07002904 ObjectArray<InterfaceEntry>* super_iftable = klass->GetSuperClass()->GetIfTable();
2905 for (size_t i = 0; i < super_ifcount; i++) {
Ian Rogersb52b01a2012-01-12 17:01:38 -08002906 Class* super_interface = super_iftable->Get(i)->GetInterface();
2907 iftable->Set(i, AllocInterfaceEntry(super_interface));
Brian Carlstrom4b620ff2011-09-11 01:11:01 -07002908 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002909 }
2910 // Flatten the interface inheritance hierarchy.
2911 size_t idx = super_ifcount;
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002912 for (size_t i = 0; i < num_interfaces; i++) {
2913 Class* interface = interfaces == NULL ? kh.GetInterface(i) : interfaces->Get(i);
Brian Carlstrom4b620ff2011-09-11 01:11:01 -07002914 DCHECK(interface != NULL);
2915 if (!interface->IsInterface()) {
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002916 ClassHelper ih(interface);
Brian Carlstrom4d9716c2012-01-30 01:49:33 -08002917 Thread* self = Thread::Current();
2918 self->ThrowNewExceptionF("Ljava/lang/IncompatibleClassChangeError;",
Elliott Hughes4a2b4172011-09-20 17:08:25 -07002919 "Class %s implements non-interface class %s",
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002920 PrettyDescriptor(klass.get()).c_str(),
2921 PrettyDescriptor(ih.GetDescriptor()).c_str());
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002922 return false;
2923 }
Ian Rogersb52b01a2012-01-12 17:01:38 -08002924 // Check if interface is already in iftable
2925 bool duplicate = false;
2926 for (size_t j = 0; j < idx; j++) {
2927 Class* existing_interface = iftable->Get(j)->GetInterface();
2928 if (existing_interface == interface) {
2929 duplicate = true;
2930 break;
2931 }
2932 }
2933 if (!duplicate) {
2934 // Add this non-duplicate interface.
2935 iftable->Set(idx++, AllocInterfaceEntry(interface));
2936 // Add this interface's non-duplicate super-interfaces.
2937 for (int32_t j = 0; j < interface->GetIfTableCount(); j++) {
2938 Class* super_interface = interface->GetIfTable()->Get(j)->GetInterface();
2939 bool super_duplicate = false;
2940 for (size_t k = 0; k < idx; k++) {
2941 Class* existing_interface = iftable->Get(k)->GetInterface();
2942 if (existing_interface == super_interface) {
2943 super_duplicate = true;
2944 break;
2945 }
2946 }
2947 if (!super_duplicate) {
2948 iftable->Set(idx++, AllocInterfaceEntry(super_interface));
2949 }
2950 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002951 }
2952 }
Ian Rogersb52b01a2012-01-12 17:01:38 -08002953 // Shrink iftable in case duplicates were found
2954 if (idx < ifcount) {
2955 iftable.reset(iftable->CopyOf(idx));
2956 ifcount = idx;
2957 } else {
2958 CHECK_EQ(idx, ifcount);
2959 }
Brian Carlstrom40381fb2011-10-19 14:13:40 -07002960 klass->SetIfTable(iftable.get());
Elliott Hughes4681c802011-09-25 18:04:37 -07002961
2962 // If we're an interface, we don't need the vtable pointers, so we're done.
2963 if (klass->IsInterface() /*|| super_ifcount == ifcount*/) {
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002964 return true;
2965 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002966 std::vector<Method*> miranda_list;
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002967 MethodHelper vtable_mh(NULL, this);
2968 MethodHelper interface_mh(NULL, this);
Brian Carlstrom4b620ff2011-09-11 01:11:01 -07002969 for (size_t i = 0; i < ifcount; ++i) {
2970 InterfaceEntry* interface_entry = iftable->Get(i);
2971 Class* interface = interface_entry->GetInterface();
2972 ObjectArray<Method>* method_array = AllocObjectArray<Method>(interface->NumVirtualMethods());
2973 interface_entry->SetMethodArray(method_array);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002974 ObjectArray<Method>* vtable = klass->GetVTableDuringLinking();
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002975 for (size_t j = 0; j < interface->NumVirtualMethods(); ++j) {
2976 Method* interface_method = interface->GetVirtualMethod(j);
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002977 interface_mh.ChangeMethod(interface_method);
Brian Carlstrom4b620ff2011-09-11 01:11:01 -07002978 int32_t k;
Elliott Hughes4681c802011-09-25 18:04:37 -07002979 // For each method listed in the interface's method list, find the
2980 // matching method in our class's method list. We want to favor the
2981 // subclass over the superclass, which just requires walking
2982 // back from the end of the vtable. (This only matters if the
2983 // superclass defines a private method and this class redefines
2984 // it -- otherwise it would use the same vtable slot. In .dex files
2985 // those don't end up in the virtual method table, so it shouldn't
2986 // matter which direction we go. We walk it backward anyway.)
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002987 for (k = vtable->GetLength() - 1; k >= 0; --k) {
2988 Method* vtable_method = vtable->Get(k);
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002989 vtable_mh.ChangeMethod(vtable_method);
2990 if (interface_mh.HasSameNameAndSignature(&vtable_mh)) {
Carl Shapiro8860c0e2011-08-04 17:36:16 -07002991 if (!vtable_method->IsPublic()) {
Elliott Hughes5cb5ad22011-10-02 12:13:39 -07002992 Thread::Current()->ThrowNewExceptionF("Ljava/lang/IllegalAccessError;",
Elliott Hughes4a2b4172011-09-20 17:08:25 -07002993 "Implementation not public: %s", PrettyMethod(vtable_method).c_str());
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002994 return false;
2995 }
Brian Carlstrom4b620ff2011-09-11 01:11:01 -07002996 method_array->Set(j, vtable_method);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002997 break;
2998 }
2999 }
3000 if (k < 0) {
Brian Carlstrom40381fb2011-10-19 14:13:40 -07003001 SirtRef<Method> miranda_method(NULL);
Elliott Hughes4681c802011-09-25 18:04:37 -07003002 for (size_t mir = 0; mir < miranda_list.size(); mir++) {
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08003003 Method* mir_method = miranda_list[mir];
3004 vtable_mh.ChangeMethod(mir_method);
3005 if (interface_mh.HasSameNameAndSignature(&vtable_mh)) {
Brian Carlstrom40381fb2011-10-19 14:13:40 -07003006 miranda_method.reset(miranda_list[mir]);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003007 break;
3008 }
3009 }
Brian Carlstrom40381fb2011-10-19 14:13:40 -07003010 if (miranda_method.get() == NULL) {
Elliott Hughes4681c802011-09-25 18:04:37 -07003011 // point the interface table at a phantom slot
Brian Carlstrom40381fb2011-10-19 14:13:40 -07003012 miranda_method.reset(AllocMethod());
3013 memcpy(miranda_method.get(), interface_method, sizeof(Method));
3014 miranda_list.push_back(miranda_method.get());
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003015 }
Brian Carlstrom40381fb2011-10-19 14:13:40 -07003016 method_array->Set(j, miranda_method.get());
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003017 }
3018 }
3019 }
Elliott Hughes4681c802011-09-25 18:04:37 -07003020 if (!miranda_list.empty()) {
Brian Carlstrom913af1b2011-07-23 21:41:13 -07003021 int old_method_count = klass->NumVirtualMethods();
Elliott Hughes4681c802011-09-25 18:04:37 -07003022 int new_method_count = old_method_count + miranda_list.size();
Brian Carlstrom27ec9612011-09-19 20:20:38 -07003023 klass->SetVirtualMethods((old_method_count == 0)
3024 ? AllocObjectArray<Method>(new_method_count)
3025 : klass->GetVirtualMethods()->CopyOf(new_method_count));
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003026
Ian Rogers30fab402012-01-23 15:43:46 -08003027 SirtRef<ObjectArray<Method> > vtable(klass->GetVTableDuringLinking());
3028 CHECK(vtable.get() != NULL);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003029 int old_vtable_count = vtable->GetLength();
Elliott Hughes4681c802011-09-25 18:04:37 -07003030 int new_vtable_count = old_vtable_count + miranda_list.size();
Ian Rogers30fab402012-01-23 15:43:46 -08003031 vtable.reset(vtable->CopyOf(new_vtable_count));
Elliott Hughes4681c802011-09-25 18:04:37 -07003032 for (size_t i = 0; i < miranda_list.size(); ++i) {
Brian Carlstrom92827a52011-10-10 15:50:01 -07003033 Method* method = miranda_list[i];
Ian Rogers9074b992011-10-26 17:41:55 -07003034 // Leave the declaring class alone as type indices are relative to it
Brian Carlstrom92827a52011-10-10 15:50:01 -07003035 method->SetAccessFlags(method->GetAccessFlags() | kAccMiranda);
3036 method->SetMethodIndex(0xFFFF & (old_vtable_count + i));
3037 klass->SetVirtualMethod(old_method_count + i, method);
3038 vtable->Set(old_vtable_count + i, method);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003039 }
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003040 // TODO: do not assign to the vtable field until it is fully constructed.
Ian Rogers30fab402012-01-23 15:43:46 -08003041 klass->SetVTable(vtable.get());
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003042 }
Elliott Hughes4681c802011-09-25 18:04:37 -07003043
3044 ObjectArray<Method>* vtable = klass->GetVTableDuringLinking();
3045 for (int i = 0; i < vtable->GetLength(); ++i) {
3046 CHECK(vtable->Get(i) != NULL);
3047 }
3048
3049// klass->DumpClass(std::cerr, Class::kDumpClassFullDetail);
3050
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003051 return true;
3052}
3053
Brian Carlstrom40381fb2011-10-19 14:13:40 -07003054bool ClassLinker::LinkInstanceFields(SirtRef<Class>& klass) {
3055 CHECK(klass.get() != NULL);
Brian Carlstrom3320cf42011-10-04 14:58:28 -07003056 return LinkFields(klass, false);
Brian Carlstrom4873d462011-08-21 15:23:39 -07003057}
3058
Brian Carlstrom40381fb2011-10-19 14:13:40 -07003059bool ClassLinker::LinkStaticFields(SirtRef<Class>& klass) {
3060 CHECK(klass.get() != NULL);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003061 size_t allocated_class_size = klass->GetClassSize();
Brian Carlstrom3320cf42011-10-04 14:58:28 -07003062 bool success = LinkFields(klass, true);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003063 CHECK_EQ(allocated_class_size, klass->GetClassSize());
Brian Carlstrom4873d462011-08-21 15:23:39 -07003064 return success;
3065}
3066
Brian Carlstromdbc05252011-09-09 01:59:59 -07003067struct LinkFieldsComparator {
Elliott Hughesba8eee12012-01-24 20:25:24 -08003068 explicit LinkFieldsComparator(FieldHelper* fh) : fh_(fh) {}
Elliott Hughes3b6baaa2011-10-14 19:13:56 -07003069 bool operator()(const Field* field1, const Field* field2) {
Brian Carlstromdbc05252011-09-09 01:59:59 -07003070 // First come reference fields, then 64-bit, and finally 32-bit
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08003071 fh_->ChangeField(field1);
3072 Primitive::Type type1 = fh_->GetTypeAsPrimitiveType();
3073 fh_->ChangeField(field2);
3074 Primitive::Type type2 = fh_->GetTypeAsPrimitiveType();
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07003075 bool isPrimitive1 = type1 != Primitive::kPrimNot;
3076 bool isPrimitive2 = type2 != Primitive::kPrimNot;
3077 bool is64bit1 = isPrimitive1 && (type1 == Primitive::kPrimLong || type1 == Primitive::kPrimDouble);
3078 bool is64bit2 = isPrimitive2 && (type2 == Primitive::kPrimLong || type2 == Primitive::kPrimDouble);
Brian Carlstromdbc05252011-09-09 01:59:59 -07003079 int order1 = (!isPrimitive1 ? 0 : (is64bit1 ? 1 : 2));
3080 int order2 = (!isPrimitive2 ? 0 : (is64bit2 ? 1 : 2));
3081 if (order1 != order2) {
3082 return order1 < order2;
3083 }
3084
3085 // same basic group? then sort by string.
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08003086 fh_->ChangeField(field1);
3087 StringPiece name1(fh_->GetName());
3088 fh_->ChangeField(field2);
3089 StringPiece name2(fh_->GetName());
Brian Carlstromdbc05252011-09-09 01:59:59 -07003090 return name1 < name2;
3091 }
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08003092
3093 FieldHelper* fh_;
Brian Carlstromdbc05252011-09-09 01:59:59 -07003094};
3095
Brian Carlstrom40381fb2011-10-19 14:13:40 -07003096bool ClassLinker::LinkFields(SirtRef<Class>& klass, bool is_static) {
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003097 size_t num_fields =
Brian Carlstrom3320cf42011-10-04 14:58:28 -07003098 is_static ? klass->NumStaticFields() : klass->NumInstanceFields();
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003099
3100 ObjectArray<Field>* fields =
Brian Carlstrom3320cf42011-10-04 14:58:28 -07003101 is_static ? klass->GetSFields() : klass->GetIFields();
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003102
3103 // Initialize size and field_offset
Brian Carlstrom693267a2011-09-06 09:25:34 -07003104 size_t size;
3105 MemberOffset field_offset(0);
Brian Carlstrom3320cf42011-10-04 14:58:28 -07003106 if (is_static) {
3107 size = klass->GetClassSize();
3108 field_offset = Class::FieldsOffset();
3109 } else {
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003110 Class* super_class = klass->GetSuperClass();
3111 if (super_class != NULL) {
Elliott Hughes5fe594f2011-09-08 12:33:17 -07003112 CHECK(super_class->IsResolved());
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003113 field_offset = MemberOffset(super_class->GetObjectSize());
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003114 }
3115 size = field_offset.Uint32Value();
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003116 }
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003117
Brian Carlstromdbc05252011-09-09 01:59:59 -07003118 CHECK_EQ(num_fields == 0, fields == NULL);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003119
Brian Carlstromdbc05252011-09-09 01:59:59 -07003120 // we want a relatively stable order so that adding new fields
Elliott Hughesadb460d2011-10-05 17:02:34 -07003121 // minimizes disruption of C++ version such as Class and Method.
Brian Carlstromdbc05252011-09-09 01:59:59 -07003122 std::deque<Field*> grouped_and_sorted_fields;
3123 for (size_t i = 0; i < num_fields; i++) {
3124 grouped_and_sorted_fields.push_back(fields->Get(i));
3125 }
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08003126 FieldHelper fh(NULL, this);
Brian Carlstromdbc05252011-09-09 01:59:59 -07003127 std::sort(grouped_and_sorted_fields.begin(),
3128 grouped_and_sorted_fields.end(),
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08003129 LinkFieldsComparator(&fh));
Brian Carlstromdbc05252011-09-09 01:59:59 -07003130
3131 // References should be at the front.
3132 size_t current_field = 0;
3133 size_t num_reference_fields = 0;
3134 for (; current_field < num_fields; current_field++) {
3135 Field* field = grouped_and_sorted_fields.front();
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08003136 fh.ChangeField(field);
3137 Primitive::Type type = fh.GetTypeAsPrimitiveType();
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07003138 bool isPrimitive = type != Primitive::kPrimNot;
Brian Carlstromdbc05252011-09-09 01:59:59 -07003139 if (isPrimitive) {
3140 break; // past last reference, move on to the next phase
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003141 }
Brian Carlstromdbc05252011-09-09 01:59:59 -07003142 grouped_and_sorted_fields.pop_front();
3143 num_reference_fields++;
3144 fields->Set(current_field, field);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003145 field->SetOffset(field_offset);
3146 field_offset = MemberOffset(field_offset.Uint32Value() + sizeof(uint32_t));
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003147 }
3148
3149 // Now we want to pack all of the double-wide fields together. If
3150 // we're not aligned, though, we want to shuffle one 32-bit field
3151 // into place. If we can't find one, we'll have to pad it.
Elliott Hughes06b37d92011-10-16 11:51:29 -07003152 if (current_field != num_fields && !IsAligned<8>(field_offset.Uint32Value())) {
Brian Carlstromdbc05252011-09-09 01:59:59 -07003153 for (size_t i = 0; i < grouped_and_sorted_fields.size(); i++) {
3154 Field* field = grouped_and_sorted_fields[i];
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08003155 fh.ChangeField(field);
3156 Primitive::Type type = fh.GetTypeAsPrimitiveType();
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07003157 CHECK(type != Primitive::kPrimNot); // should only be working on primitive types
3158 if (type == Primitive::kPrimLong || type == Primitive::kPrimDouble) {
Brian Carlstromdbc05252011-09-09 01:59:59 -07003159 continue;
3160 }
3161 fields->Set(current_field++, field);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003162 field->SetOffset(field_offset);
Brian Carlstromdbc05252011-09-09 01:59:59 -07003163 // drop the consumed field
3164 grouped_and_sorted_fields.erase(grouped_and_sorted_fields.begin() + i);
3165 break;
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003166 }
Brian Carlstromdbc05252011-09-09 01:59:59 -07003167 // whether we found a 32-bit field for padding or not, we advance
3168 field_offset = MemberOffset(field_offset.Uint32Value() + sizeof(uint32_t));
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003169 }
3170
3171 // Alignment is good, shuffle any double-wide fields forward, and
3172 // finish assigning field offsets to all fields.
Elliott Hughes06b37d92011-10-16 11:51:29 -07003173 DCHECK(current_field == num_fields || IsAligned<8>(field_offset.Uint32Value()));
Brian Carlstromdbc05252011-09-09 01:59:59 -07003174 while (!grouped_and_sorted_fields.empty()) {
3175 Field* field = grouped_and_sorted_fields.front();
3176 grouped_and_sorted_fields.pop_front();
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08003177 fh.ChangeField(field);
3178 Primitive::Type type = fh.GetTypeAsPrimitiveType();
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07003179 CHECK(type != Primitive::kPrimNot); // should only be working on primitive types
Brian Carlstromdbc05252011-09-09 01:59:59 -07003180 fields->Set(current_field, field);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003181 field->SetOffset(field_offset);
Brian Carlstromdbc05252011-09-09 01:59:59 -07003182 field_offset = MemberOffset(field_offset.Uint32Value() +
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07003183 ((type == Primitive::kPrimLong || type == Primitive::kPrimDouble)
Brian Carlstromdbc05252011-09-09 01:59:59 -07003184 ? sizeof(uint64_t)
3185 : sizeof(uint32_t)));
3186 current_field++;
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003187 }
3188
Elliott Hughesadb460d2011-10-05 17:02:34 -07003189 // We lie to the GC about the java.lang.ref.Reference.referent field, so it doesn't scan it.
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08003190 std::string descriptor(ClassHelper(klass.get(), this).GetDescriptor());
3191 if (!is_static && descriptor == "Ljava/lang/ref/Reference;") {
Elliott Hughesadb460d2011-10-05 17:02:34 -07003192 // We know there are no non-reference fields in the Reference classes, and we know
3193 // that 'referent' is alphabetically last, so this is easy...
3194 CHECK_EQ(num_reference_fields, num_fields);
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08003195 fh.ChangeField(fields->Get(num_fields - 1));
Elliott Hughesba8eee12012-01-24 20:25:24 -08003196 CHECK_STREQ(fh.GetName(), "referent");
Elliott Hughesadb460d2011-10-05 17:02:34 -07003197 --num_reference_fields;
3198 }
3199
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003200#ifndef NDEBUG
Brian Carlstrombe977852011-07-19 14:54:54 -07003201 // Make sure that all reference fields appear before
3202 // non-reference fields, and all double-wide fields are aligned.
3203 bool seen_non_ref = false;
Brian Carlstromdbc05252011-09-09 01:59:59 -07003204 for (size_t i = 0; i < num_fields; i++) {
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003205 Field* field = fields->Get(i);
Brian Carlstromdbc05252011-09-09 01:59:59 -07003206 if (false) { // enable to debug field layout
Brian Carlstrom3320cf42011-10-04 14:58:28 -07003207 LOG(INFO) << "LinkFields: " << (is_static ? "static" : "instance")
Brian Carlstrom40381fb2011-10-19 14:13:40 -07003208 << " class=" << PrettyClass(klass.get())
Brian Carlstrom65ca0772011-09-24 16:03:08 -07003209 << " field=" << PrettyField(field)
Brian Carlstromdbc05252011-09-09 01:59:59 -07003210 << " offset=" << field->GetField32(MemberOffset(Field::OffsetOffset()), false);
3211 }
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08003212 fh.ChangeField(field);
3213 Primitive::Type type = fh.GetTypeAsPrimitiveType();
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07003214 bool is_primitive = type != Primitive::kPrimNot;
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08003215 if (descriptor == "Ljava/lang/ref/Reference;" && StringPiece(fh.GetName()) == "referent") {
Elliott Hughesadb460d2011-10-05 17:02:34 -07003216 is_primitive = true; // We lied above, so we have to expect a lie here.
3217 }
3218 if (is_primitive) {
Brian Carlstrombe977852011-07-19 14:54:54 -07003219 if (!seen_non_ref) {
3220 seen_non_ref = true;
Brian Carlstrom4873d462011-08-21 15:23:39 -07003221 DCHECK_EQ(num_reference_fields, i);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003222 }
Brian Carlstrombe977852011-07-19 14:54:54 -07003223 } else {
3224 DCHECK(!seen_non_ref);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003225 }
3226 }
Brian Carlstrombe977852011-07-19 14:54:54 -07003227 if (!seen_non_ref) {
Brian Carlstrom4873d462011-08-21 15:23:39 -07003228 DCHECK_EQ(num_fields, num_reference_fields);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003229 }
3230#endif
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003231 size = field_offset.Uint32Value();
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003232 // Update klass
Brian Carlstrom3320cf42011-10-04 14:58:28 -07003233 if (is_static) {
3234 klass->SetNumReferenceStaticFields(num_reference_fields);
3235 klass->SetClassSize(size);
3236 } else {
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003237 klass->SetNumReferenceInstanceFields(num_reference_fields);
Brian Carlstromdbc05252011-09-09 01:59:59 -07003238 if (!klass->IsVariableSize()) {
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003239 klass->SetObjectSize(size);
3240 }
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003241 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003242 return true;
3243}
3244
3245// Set the bitmap of reference offsets, refOffsets, from the ifields
3246// list.
Brian Carlstrom40381fb2011-10-19 14:13:40 -07003247void ClassLinker::CreateReferenceInstanceOffsets(SirtRef<Class>& klass) {
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003248 uint32_t reference_offsets = 0;
3249 Class* super_class = klass->GetSuperClass();
3250 if (super_class != NULL) {
3251 reference_offsets = super_class->GetReferenceInstanceOffsets();
Brian Carlstrom4873d462011-08-21 15:23:39 -07003252 // If our superclass overflowed, we don't stand a chance.
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003253 if (reference_offsets == CLASS_WALK_SUPER) {
3254 klass->SetReferenceInstanceOffsets(reference_offsets);
Brian Carlstrom4873d462011-08-21 15:23:39 -07003255 return;
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003256 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003257 }
Brian Carlstrom3320cf42011-10-04 14:58:28 -07003258 CreateReferenceOffsets(klass, false, reference_offsets);
Brian Carlstrom4873d462011-08-21 15:23:39 -07003259}
3260
Brian Carlstrom40381fb2011-10-19 14:13:40 -07003261void ClassLinker::CreateReferenceStaticOffsets(SirtRef<Class>& klass) {
Brian Carlstrom3320cf42011-10-04 14:58:28 -07003262 CreateReferenceOffsets(klass, true, 0);
Brian Carlstrom4873d462011-08-21 15:23:39 -07003263}
3264
Brian Carlstrom40381fb2011-10-19 14:13:40 -07003265void ClassLinker::CreateReferenceOffsets(SirtRef<Class>& klass, bool is_static,
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003266 uint32_t reference_offsets) {
3267 size_t num_reference_fields =
Brian Carlstrom3320cf42011-10-04 14:58:28 -07003268 is_static ? klass->NumReferenceStaticFieldsDuringLinking()
3269 : klass->NumReferenceInstanceFieldsDuringLinking();
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003270 const ObjectArray<Field>* fields =
Brian Carlstrom3320cf42011-10-04 14:58:28 -07003271 is_static ? klass->GetSFields() : klass->GetIFields();
Brian Carlstrom4873d462011-08-21 15:23:39 -07003272 // All of the fields that contain object references are guaranteed
3273 // to be at the beginning of the fields list.
3274 for (size_t i = 0; i < num_reference_fields; ++i) {
3275 // Note that byte_offset is the offset from the beginning of
3276 // object, not the offset into instance data
3277 const Field* field = fields->Get(i);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003278 MemberOffset byte_offset = field->GetOffsetDuringLinking();
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003279 CHECK_EQ(byte_offset.Uint32Value() & (CLASS_OFFSET_ALIGNMENT - 1), 0U);
3280 if (CLASS_CAN_ENCODE_OFFSET(byte_offset.Uint32Value())) {
3281 uint32_t new_bit = CLASS_BIT_FROM_OFFSET(byte_offset.Uint32Value());
Brian Carlstrom4873d462011-08-21 15:23:39 -07003282 CHECK_NE(new_bit, 0U);
3283 reference_offsets |= new_bit;
3284 } else {
3285 reference_offsets = CLASS_WALK_SUPER;
3286 break;
3287 }
3288 }
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003289 // Update fields in klass
Brian Carlstrom3320cf42011-10-04 14:58:28 -07003290 if (is_static) {
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003291 klass->SetReferenceStaticOffsets(reference_offsets);
Brian Carlstrom3320cf42011-10-04 14:58:28 -07003292 } else {
3293 klass->SetReferenceInstanceOffsets(reference_offsets);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003294 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003295}
3296
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003297String* ClassLinker::ResolveString(const DexFile& dex_file,
Elliott Hughescf4c6c42011-09-01 15:16:42 -07003298 uint32_t string_idx, DexCache* dex_cache) {
Brian Carlstrom7d776242012-03-06 23:05:49 -08003299 DCHECK(dex_cache != NULL);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003300 String* resolved = dex_cache->GetResolvedString(string_idx);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003301 if (resolved != NULL) {
3302 return resolved;
3303 }
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07003304 const DexFile::StringId& string_id = dex_file.GetStringId(string_idx);
3305 int32_t utf16_length = dex_file.GetStringLength(string_id);
3306 const char* utf8_data = dex_file.GetStringData(string_id);
Brian Carlstrom928bf022011-10-11 02:48:14 -07003307 String* string = intern_table_->InternStrong(utf16_length, utf8_data);
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07003308 dex_cache->SetResolvedString(string_idx, string);
3309 return string;
3310}
3311
3312Class* ClassLinker::ResolveType(const DexFile& dex_file,
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08003313 uint16_t type_idx,
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07003314 DexCache* dex_cache,
3315 const ClassLoader* class_loader) {
Brian Carlstrom7d776242012-03-06 23:05:49 -08003316 DCHECK(dex_cache != NULL);
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07003317 Class* resolved = dex_cache->GetResolvedType(type_idx);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003318 if (resolved == NULL) {
Ian Rogers0571d352011-11-03 19:51:38 -07003319 const char* descriptor = dex_file.StringByTypeIdx(type_idx);
Brian Carlstromaded5f72011-10-07 17:15:04 -07003320 resolved = FindClass(descriptor, class_loader);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003321 if (resolved != NULL) {
Jesse Wilson254db0f2011-11-16 16:44:11 -05003322 // TODO: we used to throw here if resolved's class loader was not the
3323 // boot class loader. This was to permit different classes with the
3324 // same name to be loaded simultaneously by different loaders
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003325 dex_cache->SetResolvedType(type_idx, resolved);
3326 } else {
Ian Rogerscab01012012-01-10 17:35:46 -08003327 CHECK(Thread::Current()->IsExceptionPending())
3328 << "Expected pending exception for failed resolution of: " << descriptor;
jeffhao8cd6dda2012-02-22 10:15:34 -08003329 // Convert a ClassNotFoundException to a NoClassDefFoundError
3330 if (Thread::Current()->GetException()->InstanceOf(GetClassRoot(kJavaLangClassNotFoundException))) {
3331 Thread::Current()->ClearException();
3332 ThrowNoClassDefFoundError("Failed resolution of: %s", descriptor);
3333 }
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003334 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003335 }
3336 return resolved;
3337}
3338
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07003339Method* ClassLinker::ResolveMethod(const DexFile& dex_file,
3340 uint32_t method_idx,
3341 DexCache* dex_cache,
3342 const ClassLoader* class_loader,
Brian Carlstrom20cfffa2011-08-26 02:31:27 -07003343 bool is_direct) {
Brian Carlstrom7d776242012-03-06 23:05:49 -08003344 DCHECK(dex_cache != NULL);
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07003345 Method* resolved = dex_cache->GetResolvedMethod(method_idx);
3346 if (resolved != NULL) {
3347 return resolved;
3348 }
3349 const DexFile::MethodId& method_id = dex_file.GetMethodId(method_idx);
3350 Class* klass = ResolveType(dex_file, method_id.class_idx_, dex_cache, class_loader);
3351 if (klass == NULL) {
Elliott Hughescc5f9a92011-09-28 19:17:29 -07003352 DCHECK(Thread::Current()->IsExceptionPending());
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07003353 return NULL;
3354 }
3355
Brian Carlstrom7540ff42011-09-04 16:38:46 -07003356 if (is_direct) {
Ian Rogers7b0c5b42012-02-16 15:29:07 -08003357 resolved = klass->FindDirectMethod(dex_cache, method_idx);
Brian Carlstrom7540ff42011-09-04 16:38:46 -07003358 } else if (klass->IsInterface()) {
Ian Rogers7b0c5b42012-02-16 15:29:07 -08003359 resolved = klass->FindInterfaceMethod(dex_cache, method_idx);
Brian Carlstrom20cfffa2011-08-26 02:31:27 -07003360 } else {
Ian Rogers7b0c5b42012-02-16 15:29:07 -08003361 resolved = klass->FindVirtualMethod(dex_cache, method_idx);
Brian Carlstrom20cfffa2011-08-26 02:31:27 -07003362 }
Ian Rogers7b0c5b42012-02-16 15:29:07 -08003363
3364 if (resolved == NULL) {
3365 const char* name = dex_file.StringDataByIdx(method_id.name_idx_);
3366 std::string signature(dex_file.CreateMethodSignature(method_id.proto_idx_, NULL));
3367 if (is_direct) {
3368 resolved = klass->FindDirectMethod(name, signature);
3369 } else if (klass->IsInterface()) {
3370 resolved = klass->FindInterfaceMethod(name, signature);
3371 } else {
3372 resolved = klass->FindVirtualMethod(name, signature);
jeffhao8cd6dda2012-02-22 10:15:34 -08003373 // If a virtual method isn't found, search the direct methods. This can
3374 // happen when trying to access private methods directly, and allows the
3375 // proper exception to be thrown in the caller.
3376 if (resolved == NULL) {
3377 resolved = klass->FindDirectMethod(name, signature);
3378 }
Ian Rogers7b0c5b42012-02-16 15:29:07 -08003379 }
3380 if (resolved == NULL) {
3381 ThrowNoSuchMethodError(is_direct, klass, name, signature);
3382 return NULL;
3383 }
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07003384 }
Ian Rogers7b0c5b42012-02-16 15:29:07 -08003385 dex_cache->SetResolvedMethod(method_idx, resolved);
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07003386 return resolved;
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003387}
3388
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07003389Field* ClassLinker::ResolveField(const DexFile& dex_file,
3390 uint32_t field_idx,
3391 DexCache* dex_cache,
3392 const ClassLoader* class_loader,
3393 bool is_static) {
Brian Carlstrom7d776242012-03-06 23:05:49 -08003394 DCHECK(dex_cache != NULL);
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07003395 Field* resolved = dex_cache->GetResolvedField(field_idx);
3396 if (resolved != NULL) {
3397 return resolved;
3398 }
3399 const DexFile::FieldId& field_id = dex_file.GetFieldId(field_idx);
3400 Class* klass = ResolveType(dex_file, field_id.class_idx_, dex_cache, class_loader);
3401 if (klass == NULL) {
Ian Rogers9f1ab122011-12-12 08:52:43 -08003402 DCHECK(Thread::Current()->IsExceptionPending());
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07003403 return NULL;
3404 }
3405
Brian Carlstrom20cfffa2011-08-26 02:31:27 -07003406 if (is_static) {
Ian Rogers7b0c5b42012-02-16 15:29:07 -08003407 resolved = klass->FindStaticField(dex_cache, field_idx);
Brian Carlstrom20cfffa2011-08-26 02:31:27 -07003408 } else {
Ian Rogers7b0c5b42012-02-16 15:29:07 -08003409 resolved = klass->FindInstanceField(dex_cache, field_idx);
Brian Carlstrom20cfffa2011-08-26 02:31:27 -07003410 }
Ian Rogers7b0c5b42012-02-16 15:29:07 -08003411
3412 if (resolved == NULL) {
3413 const char* name = dex_file.GetFieldName(field_id);
3414 const char* type = dex_file.GetFieldTypeDescriptor(field_id);
3415 if (is_static) {
3416 resolved = klass->FindStaticField(name, type);
3417 } else {
3418 resolved = klass->FindInstanceField(name, type);
3419 }
3420 if (resolved == NULL) {
3421 ThrowNoSuchFieldError(is_static ? "static " : "instance ", klass, type, name);
3422 return NULL;
3423 }
Ian Rogersb067ac22011-12-13 18:05:09 -08003424 }
Ian Rogers7b0c5b42012-02-16 15:29:07 -08003425 dex_cache->SetResolvedField(field_idx, resolved);
Ian Rogersb067ac22011-12-13 18:05:09 -08003426 return resolved;
3427}
3428
3429Field* ClassLinker::ResolveFieldJLS(const DexFile& dex_file,
3430 uint32_t field_idx,
3431 DexCache* dex_cache,
3432 const ClassLoader* class_loader) {
Brian Carlstrom7d776242012-03-06 23:05:49 -08003433 DCHECK(dex_cache != NULL);
Ian Rogersb067ac22011-12-13 18:05:09 -08003434 Field* resolved = dex_cache->GetResolvedField(field_idx);
3435 if (resolved != NULL) {
3436 return resolved;
3437 }
3438 const DexFile::FieldId& field_id = dex_file.GetFieldId(field_idx);
3439 Class* klass = ResolveType(dex_file, field_id.class_idx_, dex_cache, class_loader);
3440 if (klass == NULL) {
3441 DCHECK(Thread::Current()->IsExceptionPending());
3442 return NULL;
3443 }
3444
3445 const char* name = dex_file.GetFieldName(field_id);
3446 const char* type = dex_file.GetFieldTypeDescriptor(field_id);
3447 resolved = klass->FindField(name, type);
3448 if (resolved != NULL) {
3449 dex_cache->SetResolvedField(field_idx, resolved);
3450 } else {
3451 ThrowNoSuchFieldError("", klass, type, name);
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07003452 }
3453 return resolved;
Carl Shapiro5fafe2b2011-07-09 15:34:41 -07003454}
3455
Ian Rogers19846512012-02-24 11:42:47 -08003456const char* ClassLinker::MethodShorty(uint32_t method_idx, Method* referrer, uint32_t* length) {
Ian Rogersad25ac52011-10-04 19:13:33 -07003457 Class* declaring_class = referrer->GetDeclaringClass();
3458 DexCache* dex_cache = declaring_class->GetDexCache();
3459 const DexFile& dex_file = FindDexFile(dex_cache);
3460 const DexFile::MethodId& method_id = dex_file.GetMethodId(method_idx);
Ian Rogers19846512012-02-24 11:42:47 -08003461 return dex_file.GetMethodShorty(method_id, length);
Ian Rogersad25ac52011-10-04 19:13:33 -07003462}
3463
Elliott Hughes9d5ccec2011-09-19 13:19:50 -07003464void ClassLinker::DumpAllClasses(int flags) const {
3465 // TODO: at the time this was written, it wasn't safe to call PrettyField with the ClassLinker
3466 // lock held, because it might need to resolve a field's type, which would try to take the lock.
3467 std::vector<Class*> all_classes;
3468 {
Brian Carlstrom47d237a2011-10-18 15:08:33 -07003469 MutexLock mu(classes_lock_);
Elliott Hughes9d5ccec2011-09-19 13:19:50 -07003470 typedef Table::const_iterator It; // TODO: C++0x auto
3471 for (It it = classes_.begin(), end = classes_.end(); it != end; ++it) {
3472 all_classes.push_back(it->second);
3473 }
Ian Rogers5d76c432011-10-31 21:42:49 -07003474 for (It it = image_classes_.begin(), end = image_classes_.end(); it != end; ++it) {
3475 all_classes.push_back(it->second);
3476 }
Elliott Hughes9d5ccec2011-09-19 13:19:50 -07003477 }
3478
3479 for (size_t i = 0; i < all_classes.size(); ++i) {
3480 all_classes[i]->DumpClass(std::cerr, flags);
3481 }
3482}
3483
Elliott Hughescac6cc72011-11-03 20:31:21 -07003484void ClassLinker::DumpForSigQuit(std::ostream& os) const {
3485 MutexLock mu(classes_lock_);
3486 os << "Loaded classes: " << image_classes_.size() << " image classes; "
3487 << classes_.size() << " allocated classes\n";
3488}
3489
Elliott Hughese27955c2011-08-26 15:21:24 -07003490size_t ClassLinker::NumLoadedClasses() const {
Brian Carlstrom47d237a2011-10-18 15:08:33 -07003491 MutexLock mu(classes_lock_);
Ian Rogers5d76c432011-10-31 21:42:49 -07003492 return classes_.size() + image_classes_.size();
Elliott Hughese27955c2011-08-26 15:21:24 -07003493}
3494
Brian Carlstrom47d237a2011-10-18 15:08:33 -07003495pid_t ClassLinker::GetClassesLockOwner() {
3496 return classes_lock_.GetOwner();
3497}
3498
3499pid_t ClassLinker::GetDexLockOwner() {
3500 return dex_lock_.GetOwner();
Brian Carlstrom24a3c2e2011-10-17 18:07:52 -07003501}
3502
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08003503void ClassLinker::SetClassRoot(ClassRoot class_root, Class* klass) {
3504 DCHECK(!init_done_);
3505
3506 DCHECK(klass != NULL);
3507 DCHECK(klass->GetClassLoader() == NULL);
3508
3509 DCHECK(class_roots_ != NULL);
3510 DCHECK(class_roots_->Get(class_root) == NULL);
3511 class_roots_->Set(class_root, klass);
3512}
3513
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003514} // namespace art