blob: 5033c240a0ecbf5fc39e61e62306f3173ec8108e [file] [log] [blame]
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07001// Copyright 2011 Google Inc. All Rights Reserved.
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002
Brian Carlstrom578bbdc2011-07-21 14:07:47 -07003#include "class_linker.h"
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07004
Brian Carlstromd601af82012-01-06 10:15:19 -08005#include <fcntl.h>
6#include <sys/file.h>
7#include <sys/stat.h>
Brian Carlstromdbf05b72011-12-15 00:55:24 -08008#include <sys/types.h>
9#include <sys/wait.h>
10
Brian Carlstromdbc05252011-09-09 01:59:59 -070011#include <deque>
Ian Rogers0cfe1fb2011-08-26 03:29:44 -070012#include <string>
Carl Shapiro0e5d75d2011-07-06 18:28:37 -070013#include <utility>
Elliott Hughes90a33692011-08-30 13:27:07 -070014#include <vector>
Carl Shapiro0e5d75d2011-07-06 18:28:37 -070015
Brian Carlstrom578bbdc2011-07-21 14:07:47 -070016#include "casts.h"
Brian Carlstrom1f870082011-08-23 16:02:11 -070017#include "class_loader.h"
Elliott Hughes4740cdf2011-12-07 14:07:12 -080018#include "debugger.h"
Brian Carlstrom7e49dca2011-07-22 18:07:34 -070019#include "dex_cache.h"
Elliott Hughes90a33692011-08-30 13:27:07 -070020#include "dex_file.h"
Brian Carlstrom578bbdc2011-07-21 14:07:47 -070021#include "dex_verifier.h"
22#include "heap.h"
Elliott Hughescf4c6c42011-09-01 15:16:42 -070023#include "intern_table.h"
Ian Rogers0571d352011-11-03 19:51:38 -070024#include "leb128.h"
Brian Carlstrom578bbdc2011-07-21 14:07:47 -070025#include "logging.h"
Brian Carlstrom58ae9412011-10-04 00:56:06 -070026#include "oat_file.h"
Brian Carlstrom578bbdc2011-07-21 14:07:47 -070027#include "object.h"
Ian Rogers6d4d9fc2011-11-30 16:24:48 -080028#include "object_utils.h"
Brian Carlstrom1f870082011-08-23 16:02:11 -070029#include "runtime.h"
Ian Rogers466bb252011-10-14 03:29:56 -070030#include "runtime_support.h"
Elliott Hughes4d0207c2011-10-03 19:14:34 -070031#include "ScopedLocalRef.h"
Brian Carlstroma663ea52011-08-19 23:33:41 -070032#include "space.h"
Brian Carlstrom40381fb2011-10-19 14:13:40 -070033#include "stack_indirect_reference_table.h"
Brian Carlstrom58ae9412011-10-04 00:56:06 -070034#include "stl_util.h"
Brian Carlstrom578bbdc2011-07-21 14:07:47 -070035#include "thread.h"
Elliott Hughes54e7df12011-09-16 11:47:04 -070036#include "UniquePtr.h"
Brian Carlstrom578bbdc2011-07-21 14:07:47 -070037#include "utils.h"
Carl Shapiro0e5d75d2011-07-06 18:28:37 -070038
39namespace art {
40
Elliott Hughes4a2b4172011-09-20 17:08:25 -070041namespace {
42
Elliott Hughes362f9bc2011-10-17 18:56:41 -070043void ThrowNoClassDefFoundError(const char* fmt, ...) __attribute__((__format__(__printf__, 1, 2)));
Elliott Hughes4a2b4172011-09-20 17:08:25 -070044void ThrowNoClassDefFoundError(const char* fmt, ...) {
45 va_list args;
46 va_start(args, fmt);
47 Thread::Current()->ThrowNewExceptionV("Ljava/lang/NoClassDefFoundError;", fmt, args);
48 va_end(args);
49}
50
Elliott Hughes362f9bc2011-10-17 18:56:41 -070051void ThrowClassFormatError(const char* fmt, ...) __attribute__((__format__(__printf__, 1, 2)));
Elliott Hughese555dc02011-09-25 10:46:35 -070052void ThrowClassFormatError(const char* fmt, ...) {
Elliott Hughes4a2b4172011-09-20 17:08:25 -070053 va_list args;
54 va_start(args, fmt);
Elliott Hughese555dc02011-09-25 10:46:35 -070055 Thread::Current()->ThrowNewExceptionV("Ljava/lang/ClassFormatError;", fmt, args);
Elliott Hughes4a2b4172011-09-20 17:08:25 -070056 va_end(args);
57}
58
Elliott Hughes362f9bc2011-10-17 18:56:41 -070059void ThrowLinkageError(const char* fmt, ...) __attribute__((__format__(__printf__, 1, 2)));
Elliott Hughes4a2b4172011-09-20 17:08:25 -070060void ThrowLinkageError(const char* fmt, ...) {
61 va_list args;
62 va_start(args, fmt);
63 Thread::Current()->ThrowNewExceptionV("Ljava/lang/LinkageError;", fmt, args);
64 va_end(args);
65}
66
Ian Rogers9f1ab122011-12-12 08:52:43 -080067void ThrowNoSuchMethodError(bool is_direct, Class* c, const StringPiece& name,
68 const StringPiece& signature) {
Ian Rogers6d4d9fc2011-11-30 16:24:48 -080069 ClassHelper kh(c);
Elliott Hughes3b6baaa2011-10-14 19:13:56 -070070 std::ostringstream msg;
Ian Rogers9f1ab122011-12-12 08:52:43 -080071 msg << "no " << (is_direct ? "direct" : "virtual") << " method " << name << "." << signature
72 << " in class " << kh.GetDescriptor() << " or its superclasses";
Ian Rogers6d4d9fc2011-11-30 16:24:48 -080073 std::string location(kh.GetLocation());
74 if (!location.empty()) {
75 msg << " (defined in " << location << ")";
Elliott Hughescc5f9a92011-09-28 19:17:29 -070076 }
Elliott Hughes5cb5ad22011-10-02 12:13:39 -070077 Thread::Current()->ThrowNewException("Ljava/lang/NoSuchMethodError;", msg.str().c_str());
Elliott Hughescc5f9a92011-09-28 19:17:29 -070078}
79
Ian Rogersb067ac22011-12-13 18:05:09 -080080void ThrowNoSuchFieldError(const StringPiece& scope, Class* c, const StringPiece& type,
Ian Rogers9f1ab122011-12-12 08:52:43 -080081 const StringPiece& name) {
82 ClassHelper kh(c);
83 std::ostringstream msg;
Ian Rogersb067ac22011-12-13 18:05:09 -080084 msg << "no " << scope << "field " << name << " of type " << type
Ian Rogers9f1ab122011-12-12 08:52:43 -080085 << " in class " << kh.GetDescriptor() << " or its superclasses";
86 std::string location(kh.GetLocation());
87 if (!location.empty()) {
88 msg << " (defined in " << location << ")";
89 }
90 Thread::Current()->ThrowNewException("Ljava/lang/NoSuchFieldError;", msg.str().c_str());
91}
92
Ian Rogerscab01012012-01-10 17:35:46 -080093void ThrowNullPointerException(const char* fmt, ...) __attribute__((__format__(__printf__, 1, 2)));
94void ThrowNullPointerException(const char* fmt, ...) {
95 va_list args;
96 va_start(args, fmt);
97 Thread::Current()->ThrowNewExceptionV("Ljava/lang/NullPointerException;", fmt, args);
98 va_end(args);
99}
100
Elliott Hughes4a2b4172011-09-20 17:08:25 -0700101void ThrowEarlierClassFailure(Class* c) {
102 /*
103 * The class failed to initialize on a previous attempt, so we want to throw
104 * a NoClassDefFoundError (v2 2.17.5). The exception to this rule is if we
105 * failed in verification, in which case v2 5.4.1 says we need to re-throw
106 * the previous error.
107 */
108 LOG(INFO) << "Rejecting re-init on previously-failed class " << PrettyClass(c);
109
110 if (c->GetVerifyErrorClass() != NULL) {
111 // TODO: change the verifier to store an _instance_, with a useful detail message?
Ian Rogers6d4d9fc2011-11-30 16:24:48 -0800112 ClassHelper ve_ch(c->GetVerifyErrorClass());
113 std::string error_descriptor(ve_ch.GetDescriptor());
114 Thread::Current()->ThrowNewException(error_descriptor.c_str(), PrettyDescriptor(c).c_str());
Elliott Hughes4a2b4172011-09-20 17:08:25 -0700115 } else {
Ian Rogers6d4d9fc2011-11-30 16:24:48 -0800116 ThrowNoClassDefFoundError("%s", PrettyDescriptor(c).c_str());
Elliott Hughes4a2b4172011-09-20 17:08:25 -0700117 }
118}
119
Elliott Hughes4d0207c2011-10-03 19:14:34 -0700120void WrapExceptionInInitializer() {
121 JNIEnv* env = Thread::Current()->GetJniEnv();
122
123 ScopedLocalRef<jthrowable> cause(env, env->ExceptionOccurred());
124 CHECK(cause.get() != NULL);
125
126 env->ExceptionClear();
127
128 // TODO: add java.lang.Error to JniConstants?
129 ScopedLocalRef<jclass> error_class(env, env->FindClass("java/lang/Error"));
130 CHECK(error_class.get() != NULL);
131 if (env->IsInstanceOf(cause.get(), error_class.get())) {
132 // We only wrap non-Error exceptions; an Error can just be used as-is.
133 env->Throw(cause.get());
134 return;
135 }
136
137 // TODO: add java.lang.ExceptionInInitializerError to JniConstants?
138 ScopedLocalRef<jclass> eiie_class(env, env->FindClass("java/lang/ExceptionInInitializerError"));
139 CHECK(eiie_class.get() != NULL);
140
141 jmethodID mid = env->GetMethodID(eiie_class.get(), "<init>" , "(Ljava/lang/Throwable;)V");
142 CHECK(mid != NULL);
143
144 ScopedLocalRef<jthrowable> eiie(env,
145 reinterpret_cast<jthrowable>(env->NewObject(eiie_class.get(), mid, cause.get())));
146 env->Throw(eiie.get());
147}
148
Elliott Hughesc3b77c72011-12-15 20:56:48 -0800149static size_t Hash(const char* s) {
150 // This is the java.lang.String hashcode for convenience, not interoperability.
151 size_t hash = 0;
152 for (; *s != '\0'; ++s) {
153 hash = hash * 31 + *s;
154 }
155 return hash;
156}
157
Elliott Hughes362f9bc2011-10-17 18:56:41 -0700158} // namespace
Elliott Hughes4a2b4172011-09-20 17:08:25 -0700159
Elliott Hughes418d20f2011-09-22 14:00:39 -0700160const char* ClassLinker::class_roots_descriptors_[] = {
Brian Carlstroma663ea52011-08-19 23:33:41 -0700161 "Ljava/lang/Class;",
162 "Ljava/lang/Object;",
Elliott Hughes418d20f2011-09-22 14:00:39 -0700163 "[Ljava/lang/Class;",
Brian Carlstroma663ea52011-08-19 23:33:41 -0700164 "[Ljava/lang/Object;",
165 "Ljava/lang/String;",
Elliott Hughesbf61ba32011-10-11 10:53:09 -0700166 "Ljava/lang/ref/Reference;",
Elliott Hughes80609252011-09-23 17:24:51 -0700167 "Ljava/lang/reflect/Constructor;",
Brian Carlstroma663ea52011-08-19 23:33:41 -0700168 "Ljava/lang/reflect/Field;",
169 "Ljava/lang/reflect/Method;",
Ian Rogers466bb252011-10-14 03:29:56 -0700170 "Ljava/lang/reflect/Proxy;",
Brian Carlstroma663ea52011-08-19 23:33:41 -0700171 "Ljava/lang/ClassLoader;",
172 "Ldalvik/system/BaseDexClassLoader;",
173 "Ldalvik/system/PathClassLoader;",
Shih-wei Liao55df06b2011-08-26 14:39:27 -0700174 "Ljava/lang/StackTraceElement;",
Brian Carlstroma663ea52011-08-19 23:33:41 -0700175 "Z",
176 "B",
177 "C",
178 "D",
179 "F",
180 "I",
181 "J",
182 "S",
183 "V",
184 "[Z",
185 "[B",
186 "[C",
187 "[D",
188 "[F",
189 "[I",
190 "[J",
191 "[S",
Shih-wei Liao55df06b2011-08-26 14:39:27 -0700192 "[Ljava/lang/StackTraceElement;",
Brian Carlstroma663ea52011-08-19 23:33:41 -0700193};
194
Elliott Hughes4dd9b4d2011-12-12 18:29:24 -0800195ClassLinker* ClassLinker::Create(const std::string& boot_class_path, InternTable* intern_table) {
Brian Carlstrom69b15fb2011-09-03 12:25:21 -0700196 CHECK_NE(boot_class_path.size(), 0U);
Elliott Hughes4dd9b4d2011-12-12 18:29:24 -0800197 UniquePtr<ClassLinker> class_linker(new ClassLinker(intern_table));
Brian Carlstrom58ae9412011-10-04 00:56:06 -0700198 class_linker->Init(boot_class_path);
199 return class_linker.release();
200}
201
Elliott Hughes4dd9b4d2011-12-12 18:29:24 -0800202ClassLinker* ClassLinker::Create(InternTable* intern_table) {
203 UniquePtr<ClassLinker> class_linker(new ClassLinker(intern_table));
Brian Carlstrom58ae9412011-10-04 00:56:06 -0700204 class_linker->InitFromImage();
Carl Shapiro61e019d2011-07-14 16:53:09 -0700205 return class_linker.release();
206}
207
Elliott Hughes4dd9b4d2011-12-12 18:29:24 -0800208ClassLinker::ClassLinker(InternTable* intern_table)
209 : dex_lock_("ClassLinker dex lock"),
Brian Carlstrom47d237a2011-10-18 15:08:33 -0700210 classes_lock_("ClassLinker classes lock"),
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -0700211 class_roots_(NULL),
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700212 array_iftable_(NULL),
Elliott Hughescf4c6c42011-09-01 15:16:42 -0700213 init_done_(false),
214 intern_table_(intern_table) {
Elliott Hughes418d20f2011-09-22 14:00:39 -0700215 CHECK_EQ(arraysize(class_roots_descriptors_), size_t(kClassRootsMax));
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -0700216}
Brian Carlstroma663ea52011-08-19 23:33:41 -0700217
Brian Carlstrom58ae9412011-10-04 00:56:06 -0700218void CreateClassPath(const std::string& class_path,
219 std::vector<const DexFile*>& class_path_vector) {
220 std::vector<std::string> parsed;
221 Split(class_path, ':', parsed);
222 for (size_t i = 0; i < parsed.size(); ++i) {
223 const DexFile* dex_file = DexFile::Open(parsed[i], Runtime::Current()->GetHostPrefix());
Brian Carlstrom0dd7dda2011-10-25 15:47:53 -0700224 if (dex_file == NULL) {
225 LOG(WARNING) << "Failed to open dex file " << parsed[i];
226 } else {
Brian Carlstrom58ae9412011-10-04 00:56:06 -0700227 class_path_vector.push_back(dex_file);
228 }
229 }
230}
231
232void ClassLinker::Init(const std::string& boot_class_path) {
Elliott Hughes4dd9b4d2011-12-12 18:29:24 -0800233 VLOG(startup) << "ClassLinker::InitFrom entering boot_class_path=" << boot_class_path;
Brian Carlstrom0a5b14d2011-09-27 13:29:15 -0700234
Elliott Hughesd8ddfd52011-08-15 14:32:53 -0700235 CHECK(!init_done_);
Brian Carlstrom578bbdc2011-07-21 14:07:47 -0700236
Elliott Hughes30646832011-10-13 16:59:46 -0700237 // java_lang_Class comes first, it's needed for AllocClass
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700238 SirtRef<Class> java_lang_Class(down_cast<Class*>(Heap::AllocObject(NULL, sizeof(ClassClass))));
239 CHECK(java_lang_Class.get() != NULL);
240 java_lang_Class->SetClass(java_lang_Class.get());
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700241 java_lang_Class->SetClassSize(sizeof(ClassClass));
Brian Carlstrom75cb3b42011-07-28 02:13:36 -0700242 // AllocClass(Class*) can now be used
Brian Carlstroma0808032011-07-18 00:39:23 -0700243
Elliott Hughes418d20f2011-09-22 14:00:39 -0700244 // Class[] is used for reflection support.
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700245 SirtRef<Class> class_array_class(AllocClass(java_lang_Class.get(), sizeof(Class)));
246 class_array_class->SetComponentType(java_lang_Class.get());
Elliott Hughes418d20f2011-09-22 14:00:39 -0700247
Brian Carlstrom75cb3b42011-07-28 02:13:36 -0700248 // java_lang_Object comes next so that object_array_class can be created
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700249 SirtRef<Class> java_lang_Object(AllocClass(java_lang_Class.get(), sizeof(Class)));
250 CHECK(java_lang_Object.get() != NULL);
Brian Carlstrom75cb3b42011-07-28 02:13:36 -0700251 // backfill Object as the super class of Class
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700252 java_lang_Class->SetSuperClass(java_lang_Object.get());
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700253 java_lang_Object->SetStatus(Class::kStatusLoaded);
Brian Carlstroma0808032011-07-18 00:39:23 -0700254
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700255 // Object[] next to hold class roots
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700256 SirtRef<Class> object_array_class(AllocClass(java_lang_Class.get(), sizeof(Class)));
257 object_array_class->SetComponentType(java_lang_Object.get());
Brian Carlstroma0808032011-07-18 00:39:23 -0700258
Brian Carlstrom5b8e4c82011-09-18 01:38:59 -0700259 // Setup the char class to be used for char[]
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700260 SirtRef<Class> char_class(AllocClass(java_lang_Class.get(), sizeof(Class)));
Brian Carlstrom5b8e4c82011-09-18 01:38:59 -0700261
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700262 // Setup the char[] class to be used for String
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700263 SirtRef<Class> char_array_class(AllocClass(java_lang_Class.get(), sizeof(Class)));
264 char_array_class->SetComponentType(char_class.get());
265 CharArray::SetArrayClass(char_array_class.get());
Brian Carlstrom9cff8e12011-08-18 16:47:29 -0700266
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700267 // Setup String
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700268 SirtRef<Class> java_lang_String(AllocClass(java_lang_Class.get(), sizeof(StringClass)));
269 String::SetClass(java_lang_String.get());
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700270 java_lang_String->SetObjectSize(sizeof(String));
271 java_lang_String->SetStatus(Class::kStatusResolved);
Jesse Wilson14150742011-07-29 19:04:44 -0400272
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700273 // Create storage for root classes, save away our work so far (requires
274 // descriptors)
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700275 class_roots_ = ObjectArray<Class>::Alloc(object_array_class.get(), kClassRootsMax);
Elliott Hughes30646832011-10-13 16:59:46 -0700276 CHECK(class_roots_ != NULL);
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700277 SetClassRoot(kJavaLangClass, java_lang_Class.get());
278 SetClassRoot(kJavaLangObject, java_lang_Object.get());
279 SetClassRoot(kClassArrayClass, class_array_class.get());
280 SetClassRoot(kObjectArrayClass, object_array_class.get());
281 SetClassRoot(kCharArrayClass, char_array_class.get());
282 SetClassRoot(kJavaLangString, java_lang_String.get());
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700283
284 // Setup the primitive type classes.
Brian Carlstrom6b4ef022011-10-23 14:59:04 -0700285 SetClassRoot(kPrimitiveBoolean, CreatePrimitiveClass("Z", Primitive::kPrimBoolean));
286 SetClassRoot(kPrimitiveByte, CreatePrimitiveClass("B", Primitive::kPrimByte));
287 SetClassRoot(kPrimitiveShort, CreatePrimitiveClass("S", Primitive::kPrimShort));
288 SetClassRoot(kPrimitiveInt, CreatePrimitiveClass("I", Primitive::kPrimInt));
289 SetClassRoot(kPrimitiveLong, CreatePrimitiveClass("J", Primitive::kPrimLong));
290 SetClassRoot(kPrimitiveFloat, CreatePrimitiveClass("F", Primitive::kPrimFloat));
291 SetClassRoot(kPrimitiveDouble, CreatePrimitiveClass("D", Primitive::kPrimDouble));
292 SetClassRoot(kPrimitiveVoid, CreatePrimitiveClass("V", Primitive::kPrimVoid));
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700293
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700294 // Create array interface entries to populate once we can load system classes
Brian Carlstrom4b620ff2011-09-11 01:11:01 -0700295 array_iftable_ = AllocObjectArray<InterfaceEntry>(2);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700296
297 // Create int array type for AllocDexCache (done in AppendToBootClassPath)
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700298 SirtRef<Class> int_array_class(AllocClass(java_lang_Class.get(), sizeof(Class)));
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700299 int_array_class->SetComponentType(GetClassRoot(kPrimitiveInt));
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700300 IntArray::SetArrayClass(int_array_class.get());
301 SetClassRoot(kIntArrayClass, int_array_class.get());
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700302
Brian Carlstrom75cb3b42011-07-28 02:13:36 -0700303 // now that these are registered, we can use AllocClass() and AllocObjectArray
Brian Carlstroma0808032011-07-18 00:39:23 -0700304
Brian Carlstrom69b15fb2011-09-03 12:25:21 -0700305 // setup boot_class_path_ and register class_path now that we can
306 // use AllocObjectArray to create DexCache instances
Brian Carlstrom58ae9412011-10-04 00:56:06 -0700307 std::vector<const DexFile*> boot_class_path_vector;
308 CreateClassPath(boot_class_path, boot_class_path_vector);
Brian Carlstrom0dd7dda2011-10-25 15:47:53 -0700309 CHECK_NE(0U, boot_class_path_vector.size());
Brian Carlstrom58ae9412011-10-04 00:56:06 -0700310 for (size_t i = 0; i != boot_class_path_vector.size(); ++i) {
311 const DexFile* dex_file = boot_class_path_vector[i];
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -0700312 CHECK(dex_file != NULL);
313 AppendToBootClassPath(*dex_file);
Brian Carlstrom913af1b2011-07-23 21:41:13 -0700314 }
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700315
Elliott Hughes80609252011-09-23 17:24:51 -0700316 // Constructor, Field, and Method are necessary so that FindClass can link members
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700317 SirtRef<Class> java_lang_reflect_Constructor(AllocClass(java_lang_Class.get(), sizeof(MethodClass)));
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700318 CHECK(java_lang_reflect_Constructor.get() != NULL);
Elliott Hughes80609252011-09-23 17:24:51 -0700319 java_lang_reflect_Constructor->SetObjectSize(sizeof(Method));
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700320 SetClassRoot(kJavaLangReflectConstructor, java_lang_reflect_Constructor.get());
Elliott Hughes80609252011-09-23 17:24:51 -0700321 java_lang_reflect_Constructor->SetStatus(Class::kStatusResolved);
322
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700323 SirtRef<Class> java_lang_reflect_Field(AllocClass(java_lang_Class.get(), sizeof(FieldClass)));
324 CHECK(java_lang_reflect_Field.get() != NULL);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700325 java_lang_reflect_Field->SetObjectSize(sizeof(Field));
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700326 SetClassRoot(kJavaLangReflectField, java_lang_reflect_Field.get());
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700327 java_lang_reflect_Field->SetStatus(Class::kStatusResolved);
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700328 Field::SetClass(java_lang_reflect_Field.get());
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700329
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700330 SirtRef<Class> java_lang_reflect_Method(AllocClass(java_lang_Class.get(), sizeof(MethodClass)));
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700331 CHECK(java_lang_reflect_Method.get() != NULL);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700332 java_lang_reflect_Method->SetObjectSize(sizeof(Method));
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700333 SetClassRoot(kJavaLangReflectMethod, java_lang_reflect_Method.get());
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700334 java_lang_reflect_Method->SetStatus(Class::kStatusResolved);
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700335 Method::SetClasses(java_lang_reflect_Constructor.get(), java_lang_reflect_Method.get());
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700336
337 // now we can use FindSystemClass
338
Brian Carlstrom5b8e4c82011-09-18 01:38:59 -0700339 // run char class through InitializePrimitiveClass to finish init
Brian Carlstrom6b4ef022011-10-23 14:59:04 -0700340 InitializePrimitiveClass(char_class.get(), "C", Primitive::kPrimChar);
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700341 SetClassRoot(kPrimitiveChar, char_class.get()); // needs descriptor
Brian Carlstrom5b8e4c82011-09-18 01:38:59 -0700342
Brian Carlstrom4b620ff2011-09-11 01:11:01 -0700343 // Object and String need to be rerun through FindSystemClass to finish init
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700344 java_lang_Object->SetStatus(Class::kStatusNotReady);
345 Class* Object_class = FindSystemClass("Ljava/lang/Object;");
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700346 CHECK_EQ(java_lang_Object.get(), Object_class);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700347 CHECK_EQ(java_lang_Object->GetObjectSize(), sizeof(Object));
348 java_lang_String->SetStatus(Class::kStatusNotReady);
349 Class* String_class = FindSystemClass("Ljava/lang/String;");
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700350 CHECK_EQ(java_lang_String.get(), String_class);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700351 CHECK_EQ(java_lang_String->GetObjectSize(), sizeof(String));
352
Brian Carlstrom4b620ff2011-09-11 01:11:01 -0700353 // Setup the primitive array type classes - can't be done until Object has a vtable
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700354 SetClassRoot(kBooleanArrayClass, FindSystemClass("[Z"));
355 BooleanArray::SetArrayClass(GetClassRoot(kBooleanArrayClass));
356
357 SetClassRoot(kByteArrayClass, FindSystemClass("[B"));
358 ByteArray::SetArrayClass(GetClassRoot(kByteArrayClass));
359
360 Class* found_char_array_class = FindSystemClass("[C");
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700361 CHECK_EQ(char_array_class.get(), found_char_array_class);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700362
363 SetClassRoot(kShortArrayClass, FindSystemClass("[S"));
364 ShortArray::SetArrayClass(GetClassRoot(kShortArrayClass));
365
366 Class* found_int_array_class = FindSystemClass("[I");
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700367 CHECK_EQ(int_array_class.get(), found_int_array_class);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700368
369 SetClassRoot(kLongArrayClass, FindSystemClass("[J"));
370 LongArray::SetArrayClass(GetClassRoot(kLongArrayClass));
371
372 SetClassRoot(kFloatArrayClass, FindSystemClass("[F"));
373 FloatArray::SetArrayClass(GetClassRoot(kFloatArrayClass));
374
375 SetClassRoot(kDoubleArrayClass, FindSystemClass("[D"));
376 DoubleArray::SetArrayClass(GetClassRoot(kDoubleArrayClass));
377
Elliott Hughes418d20f2011-09-22 14:00:39 -0700378 Class* found_class_array_class = FindSystemClass("[Ljava/lang/Class;");
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700379 CHECK_EQ(class_array_class.get(), found_class_array_class);
Elliott Hughes418d20f2011-09-22 14:00:39 -0700380
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700381 Class* found_object_array_class = FindSystemClass("[Ljava/lang/Object;");
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700382 CHECK_EQ(object_array_class.get(), found_object_array_class);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700383
384 // Setup the single, global copies of "interfaces" and "iftable"
385 Class* java_lang_Cloneable = FindSystemClass("Ljava/lang/Cloneable;");
386 CHECK(java_lang_Cloneable != NULL);
387 Class* java_io_Serializable = FindSystemClass("Ljava/io/Serializable;");
388 CHECK(java_io_Serializable != NULL);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700389 // We assume that Cloneable/Serializable don't have superinterfaces --
390 // normally we'd have to crawl up and explicitly list all of the
Brian Carlstrom4b620ff2011-09-11 01:11:01 -0700391 // supers as well.
Ian Rogers6d4d9fc2011-11-30 16:24:48 -0800392 array_iftable_->Set(0, AllocInterfaceEntry(java_lang_Cloneable));
393 array_iftable_->Set(1, AllocInterfaceEntry(java_io_Serializable));
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700394
Elliott Hughes418d20f2011-09-22 14:00:39 -0700395 // Sanity check Class[] and Object[]'s interfaces
Ian Rogers6d4d9fc2011-11-30 16:24:48 -0800396 ClassHelper kh(class_array_class.get(), this);
397 CHECK_EQ(java_lang_Cloneable, kh.GetInterface(0));
398 CHECK_EQ(java_io_Serializable, kh.GetInterface(1));
399 kh.ChangeClass(object_array_class.get());
400 CHECK_EQ(java_lang_Cloneable, kh.GetInterface(0));
401 CHECK_EQ(java_io_Serializable, kh.GetInterface(1));
Elliott Hughes80609252011-09-23 17:24:51 -0700402 // run Class, Constructor, Field, and Method through FindSystemClass.
Brian Carlstrom74eb46a2011-08-02 20:10:14 -0700403 // this initializes their dex_cache_ fields and register them in classes_.
Brian Carlstrom9cff8e12011-08-18 16:47:29 -0700404 Class* Class_class = FindSystemClass("Ljava/lang/Class;");
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700405 CHECK_EQ(java_lang_Class.get(), Class_class);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700406
Elliott Hughes80609252011-09-23 17:24:51 -0700407 java_lang_reflect_Constructor->SetStatus(Class::kStatusNotReady);
408 Class* Constructor_class = FindSystemClass("Ljava/lang/reflect/Constructor;");
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700409 CHECK_EQ(java_lang_reflect_Constructor.get(), Constructor_class);
Elliott Hughes80609252011-09-23 17:24:51 -0700410
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700411 java_lang_reflect_Field->SetStatus(Class::kStatusNotReady);
Brian Carlstrom9cff8e12011-08-18 16:47:29 -0700412 Class* Field_class = FindSystemClass("Ljava/lang/reflect/Field;");
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700413 CHECK_EQ(java_lang_reflect_Field.get(), Field_class);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700414
415 java_lang_reflect_Method->SetStatus(Class::kStatusNotReady);
Brian Carlstrom9cff8e12011-08-18 16:47:29 -0700416 Class* Method_class = FindSystemClass("Ljava/lang/reflect/Method;");
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700417 CHECK_EQ(java_lang_reflect_Method.get(), Method_class);
Brian Carlstrom1f870082011-08-23 16:02:11 -0700418
Ian Rogers466bb252011-10-14 03:29:56 -0700419 // End of special init trickery, subsequent classes may be loaded via FindSystemClass
420
421 // Create java.lang.reflect.Proxy root
422 Class* java_lang_reflect_Proxy = FindSystemClass("Ljava/lang/reflect/Proxy;");
423 SetClassRoot(kJavaLangReflectProxy, java_lang_reflect_Proxy);
424
Brian Carlstrom1f870082011-08-23 16:02:11 -0700425 // java.lang.ref classes need to be specially flagged, but otherwise are normal classes
Elliott Hughesbf61ba32011-10-11 10:53:09 -0700426 Class* java_lang_ref_Reference = FindSystemClass("Ljava/lang/ref/Reference;");
427 SetClassRoot(kJavaLangRefReference, java_lang_ref_Reference);
Brian Carlstrom1f870082011-08-23 16:02:11 -0700428 Class* java_lang_ref_FinalizerReference = FindSystemClass("Ljava/lang/ref/FinalizerReference;");
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700429 java_lang_ref_FinalizerReference->SetAccessFlags(
430 java_lang_ref_FinalizerReference->GetAccessFlags() |
431 kAccClassIsReference | kAccClassIsFinalizerReference);
Brian Carlstrom1f870082011-08-23 16:02:11 -0700432 Class* java_lang_ref_PhantomReference = FindSystemClass("Ljava/lang/ref/PhantomReference;");
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700433 java_lang_ref_PhantomReference->SetAccessFlags(
434 java_lang_ref_PhantomReference->GetAccessFlags() |
435 kAccClassIsReference | kAccClassIsPhantomReference);
Brian Carlstrom1f870082011-08-23 16:02:11 -0700436 Class* java_lang_ref_SoftReference = FindSystemClass("Ljava/lang/ref/SoftReference;");
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700437 java_lang_ref_SoftReference->SetAccessFlags(
438 java_lang_ref_SoftReference->GetAccessFlags() | kAccClassIsReference);
Brian Carlstrom1f870082011-08-23 16:02:11 -0700439 Class* java_lang_ref_WeakReference = FindSystemClass("Ljava/lang/ref/WeakReference;");
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700440 java_lang_ref_WeakReference->SetAccessFlags(
441 java_lang_ref_WeakReference->GetAccessFlags() |
442 kAccClassIsReference | kAccClassIsWeakReference);
Brian Carlstrom1f870082011-08-23 16:02:11 -0700443
Brian Carlstromaded5f72011-10-07 17:15:04 -0700444 // Setup the ClassLoaders, verifying the object_size_
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700445 Class* java_lang_ClassLoader = FindSystemClass("Ljava/lang/ClassLoader;");
Brian Carlstromaded5f72011-10-07 17:15:04 -0700446 CHECK_EQ(java_lang_ClassLoader->GetObjectSize(), sizeof(ClassLoader));
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700447 SetClassRoot(kJavaLangClassLoader, java_lang_ClassLoader);
448
449 Class* dalvik_system_BaseDexClassLoader = FindSystemClass("Ldalvik/system/BaseDexClassLoader;");
450 CHECK_EQ(dalvik_system_BaseDexClassLoader->GetObjectSize(), sizeof(BaseDexClassLoader));
451 SetClassRoot(kDalvikSystemBaseDexClassLoader, dalvik_system_BaseDexClassLoader);
452
453 Class* dalvik_system_PathClassLoader = FindSystemClass("Ldalvik/system/PathClassLoader;");
454 CHECK_EQ(dalvik_system_PathClassLoader->GetObjectSize(), sizeof(PathClassLoader));
455 SetClassRoot(kDalvikSystemPathClassLoader, dalvik_system_PathClassLoader);
456 PathClassLoader::SetClass(dalvik_system_PathClassLoader);
457
458 // Set up java.lang.StackTraceElement as a convenience
Brian Carlstrom1f870082011-08-23 16:02:11 -0700459 SetClassRoot(kJavaLangStackTraceElement, FindSystemClass("Ljava/lang/StackTraceElement;"));
460 SetClassRoot(kJavaLangStackTraceElementArrayClass, FindSystemClass("[Ljava/lang/StackTraceElement;"));
Shih-wei Liao55df06b2011-08-26 14:39:27 -0700461 StackTraceElement::SetClass(GetClassRoot(kJavaLangStackTraceElement));
Elliott Hughesd8ddfd52011-08-15 14:32:53 -0700462
Brian Carlstroma663ea52011-08-19 23:33:41 -0700463 FinishInit();
Brian Carlstrom0a5b14d2011-09-27 13:29:15 -0700464
Elliott Hughes4dd9b4d2011-12-12 18:29:24 -0800465 VLOG(startup) << "ClassLinker::InitFrom exiting";
Brian Carlstroma663ea52011-08-19 23:33:41 -0700466}
467
468void ClassLinker::FinishInit() {
Elliott Hughes4dd9b4d2011-12-12 18:29:24 -0800469 VLOG(startup) << "ClassLinker::FinishInit entering";
Brian Carlstrom16192862011-09-12 17:50:06 -0700470
471 // Let the heap know some key offsets into java.lang.ref instances
Elliott Hughes20cde902011-10-04 17:37:27 -0700472 // Note: we hard code the field indexes here rather than using FindInstanceField
Brian Carlstrom16192862011-09-12 17:50:06 -0700473 // as the types of the field can't be resolved prior to the runtime being
474 // fully initialized
Elliott Hughesbf61ba32011-10-11 10:53:09 -0700475 Class* java_lang_ref_Reference = GetClassRoot(kJavaLangRefReference);
Elliott Hughesadb460d2011-10-05 17:02:34 -0700476 Class* java_lang_ref_ReferenceQueue = FindSystemClass("Ljava/lang/ref/ReferenceQueue;");
Brian Carlstrom16192862011-09-12 17:50:06 -0700477 Class* java_lang_ref_FinalizerReference = FindSystemClass("Ljava/lang/ref/FinalizerReference;");
478
Elliott Hughesadb460d2011-10-05 17:02:34 -0700479 Heap::SetWellKnownClasses(java_lang_ref_FinalizerReference, java_lang_ref_ReferenceQueue);
480
Ian Rogers6d4d9fc2011-11-30 16:24:48 -0800481 const DexFile& java_lang_dex = FindDexFile(java_lang_ref_Reference->GetDexCache());
482
Brian Carlstrom16192862011-09-12 17:50:06 -0700483 Field* pendingNext = java_lang_ref_Reference->GetInstanceField(0);
Ian Rogers6d4d9fc2011-11-30 16:24:48 -0800484 FieldHelper fh(pendingNext, this);
485 CHECK_STREQ(fh.GetName(), "pendingNext");
486 CHECK_EQ(java_lang_dex.GetFieldId(pendingNext->GetDexFieldIndex()).type_idx_,
487 java_lang_ref_Reference->GetDexTypeIndex());
Brian Carlstrom16192862011-09-12 17:50:06 -0700488
489 Field* queue = java_lang_ref_Reference->GetInstanceField(1);
Ian Rogers6d4d9fc2011-11-30 16:24:48 -0800490 fh.ChangeField(queue);
491 CHECK_STREQ(fh.GetName(), "queue");
492 CHECK_EQ(java_lang_dex.GetFieldId(queue->GetDexFieldIndex()).type_idx_,
493 java_lang_ref_ReferenceQueue->GetDexTypeIndex());
Brian Carlstrom16192862011-09-12 17:50:06 -0700494
495 Field* queueNext = java_lang_ref_Reference->GetInstanceField(2);
Ian Rogers6d4d9fc2011-11-30 16:24:48 -0800496 fh.ChangeField(queueNext);
497 CHECK_STREQ(fh.GetName(), "queueNext");
498 CHECK_EQ(java_lang_dex.GetFieldId(queueNext->GetDexFieldIndex()).type_idx_,
499 java_lang_ref_Reference->GetDexTypeIndex());
Brian Carlstrom16192862011-09-12 17:50:06 -0700500
501 Field* referent = java_lang_ref_Reference->GetInstanceField(3);
Ian Rogers6d4d9fc2011-11-30 16:24:48 -0800502 fh.ChangeField(referent);
503 CHECK_STREQ(fh.GetName(), "referent");
504 CHECK_EQ(java_lang_dex.GetFieldId(referent->GetDexFieldIndex()).type_idx_,
505 GetClassRoot(kJavaLangObject)->GetDexTypeIndex());
Brian Carlstrom16192862011-09-12 17:50:06 -0700506
507 Field* zombie = java_lang_ref_FinalizerReference->GetInstanceField(2);
Ian Rogers6d4d9fc2011-11-30 16:24:48 -0800508 fh.ChangeField(zombie);
509 CHECK_STREQ(fh.GetName(), "zombie");
510 CHECK_EQ(java_lang_dex.GetFieldId(zombie->GetDexFieldIndex()).type_idx_,
511 GetClassRoot(kJavaLangObject)->GetDexTypeIndex());
Brian Carlstrom16192862011-09-12 17:50:06 -0700512
513 Heap::SetReferenceOffsets(referent->GetOffset(),
514 queue->GetOffset(),
515 queueNext->GetOffset(),
516 pendingNext->GetOffset(),
517 zombie->GetOffset());
518
Brian Carlstroma663ea52011-08-19 23:33:41 -0700519 // ensure all class_roots_ are initialized
Brian Carlstrom75cb3b42011-07-28 02:13:36 -0700520 for (size_t i = 0; i < kClassRootsMax; i++) {
Brian Carlstroma663ea52011-08-19 23:33:41 -0700521 ClassRoot class_root = static_cast<ClassRoot>(i);
522 Class* klass = GetClassRoot(class_root);
523 CHECK(klass != NULL);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700524 DCHECK(klass->IsArrayClass() || klass->IsPrimitive() || klass->GetDexCache() != NULL);
Brian Carlstroma663ea52011-08-19 23:33:41 -0700525 // note SetClassRoot does additional validation.
526 // if possible add new checks there to catch errors early
Brian Carlstrom75cb3b42011-07-28 02:13:36 -0700527 }
528
Elliott Hughes92f14b22011-10-06 12:29:54 -0700529 CHECK(array_iftable_ != NULL);
Elliott Hughes92f14b22011-10-06 12:29:54 -0700530
Brian Carlstrom75cb3b42011-07-28 02:13:36 -0700531 // disable the slow paths in FindClass and CreatePrimitiveClass now
532 // that Object, Class, and Object[] are setup
533 init_done_ = true;
Brian Carlstrom0a5b14d2011-09-27 13:29:15 -0700534
Elliott Hughes4dd9b4d2011-12-12 18:29:24 -0800535 VLOG(startup) << "ClassLinker::FinishInit exiting";
Brian Carlstrom75cb3b42011-07-28 02:13:36 -0700536}
537
Elliott Hughes2a20cfd2011-09-23 19:30:41 -0700538void ClassLinker::RunRootClinits() {
539 Thread* self = Thread::Current();
540 for (size_t i = 0; i < ClassLinker::kClassRootsMax; ++i) {
541 Class* c = GetClassRoot(ClassRoot(i));
542 if (!c->IsArrayClass() && !c->IsPrimitive()) {
543 EnsureInitialized(GetClassRoot(ClassRoot(i)), true);
Elliott Hughesd9cdfe92011-10-06 16:09:04 -0700544 CHECK(!self->IsExceptionPending()) << PrettyTypeOf(self->GetException());
Elliott Hughes2a20cfd2011-09-23 19:30:41 -0700545 }
546 }
547}
548
Brian Carlstromd601af82012-01-06 10:15:19 -0800549bool ClassLinker::GenerateOatFile(const std::string& dex_filename,
550 int oat_fd,
551 const std::string& oat_cache_filename) {
Brian Carlstrom29e7ac72011-12-05 23:42:57 -0800552 std::string dex2oat_string("/system/bin/dex2oat");
553#ifndef NDEBUG
554 dex2oat_string += 'd';
555#endif
556 const char* dex2oat = dex2oat_string.c_str();
557
558 const char* class_path = Runtime::Current()->GetClassPath().c_str();
559
560 std::string boot_image_option_string("--boot-image=");
561 boot_image_option_string += Heap::GetSpaces()[0]->GetImageFilename();
562 const char* boot_image_option = boot_image_option_string.c_str();
563
564 std::string dex_file_option_string("--dex-file=");
Brian Carlstromd601af82012-01-06 10:15:19 -0800565 dex_file_option_string += dex_filename;
Brian Carlstrom29e7ac72011-12-05 23:42:57 -0800566 const char* dex_file_option = dex_file_option_string.c_str();
567
Brian Carlstromd601af82012-01-06 10:15:19 -0800568 std::string oat_fd_option_string("--oat-fd=");
Brian Carlstrom866c8622012-01-06 16:35:13 -0800569 StringAppendF(&oat_fd_option_string, "%d", oat_fd);
Brian Carlstromd601af82012-01-06 10:15:19 -0800570 const char* oat_fd_option = oat_fd_option_string.c_str();
571
572 std::string oat_name_option_string("--oat-name=");
573 oat_name_option_string += oat_cache_filename;
574 const char* oat_name_option = oat_name_option_string.c_str();
Brian Carlstrom29e7ac72011-12-05 23:42:57 -0800575
jeffhao262bf462011-10-20 18:36:32 -0700576 // fork and exec dex2oat
577 pid_t pid = fork();
578 if (pid == 0) {
Brian Carlstrom29e7ac72011-12-05 23:42:57 -0800579 // no allocation allowed between fork and exec
Ian Rogers725aee52012-01-11 11:56:56 -0800580
581 // change process groups, so we don't get reaped by ProcessManager
582 setpgid(0, 0);
583
jeffhao10037c82012-01-23 15:06:23 -0800584 VLOG(class_linker) << dex2oat
585 << " --runtime-arg -Xms64m"
586 << " --runtime-arg -Xmx64m"
587 << " --runtime-arg -classpath"
588 << " --runtime-arg " << class_path
589 << " " << boot_image_option
590 << " " << dex_file_option
591 << " " << oat_fd_option
592 << " " << oat_name_option;
593
Brian Carlstrom29e7ac72011-12-05 23:42:57 -0800594 execl(dex2oat, dex2oat,
jeffhao5d840402011-10-24 17:09:45 -0700595 "--runtime-arg", "-Xms64m",
596 "--runtime-arg", "-Xmx64m",
Jesse Wilson254db0f2011-11-16 16:44:11 -0500597 "--runtime-arg", "-classpath",
Brian Carlstrom29e7ac72011-12-05 23:42:57 -0800598 "--runtime-arg", class_path,
599 boot_image_option,
600 dex_file_option,
Brian Carlstromd601af82012-01-06 10:15:19 -0800601 oat_fd_option,
602 oat_name_option,
jeffhao262bf462011-10-20 18:36:32 -0700603 NULL);
604
Brian Carlstrom29e7ac72011-12-05 23:42:57 -0800605 PLOG(FATAL) << "execl(" << dex2oat << ") failed";
Brian Carlstromd601af82012-01-06 10:15:19 -0800606 return false;
jeffhao262bf462011-10-20 18:36:32 -0700607 } else {
608 // wait for dex2oat to finish
609 int status;
610 pid_t got_pid = TEMP_FAILURE_RETRY(waitpid(pid, &status, 0));
611 if (got_pid != pid) {
612 PLOG(ERROR) << "waitpid failed: wanted " << pid << ", got " << got_pid;
Brian Carlstromd601af82012-01-06 10:15:19 -0800613 return false;
jeffhao262bf462011-10-20 18:36:32 -0700614 }
615 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) {
Brian Carlstromd601af82012-01-06 10:15:19 -0800616 LOG(ERROR) << dex2oat << " failed with dex-file=" << dex_filename;
617 return false;
jeffhao262bf462011-10-20 18:36:32 -0700618 }
619 }
Brian Carlstromd601af82012-01-06 10:15:19 -0800620 return true;
jeffhao262bf462011-10-20 18:36:32 -0700621}
622
Brian Carlstrom866c8622012-01-06 16:35:13 -0800623void ClassLinker::RegisterOatFile(const OatFile& oat_file) {
624 MutexLock mu(dex_lock_);
625 RegisterOatFileLocked(oat_file);
626}
627
628void ClassLinker::RegisterOatFileLocked(const OatFile& oat_file) {
629 dex_lock_.AssertHeld();
630 oat_files_.push_back(&oat_file);
631}
632
Brian Carlstrom58ae9412011-10-04 00:56:06 -0700633OatFile* ClassLinker::OpenOat(const Space* space) {
Brian Carlstrom47d237a2011-10-18 15:08:33 -0700634 MutexLock mu(dex_lock_);
Brian Carlstrom58ae9412011-10-04 00:56:06 -0700635 const Runtime* runtime = Runtime::Current();
Elliott Hughes4dd9b4d2011-12-12 18:29:24 -0800636 VLOG(startup) << "ClassLinker::OpenOat entering";
Brian Carlstrom58ae9412011-10-04 00:56:06 -0700637 const ImageHeader& image_header = space->GetImageHeader();
Ian Rogers6d4d9fc2011-11-30 16:24:48 -0800638 // Grab location but don't use Object::AsString as we haven't yet initialized the roots to
639 // check the down cast
640 String* oat_location = down_cast<String*>(image_header.GetImageRoot(ImageHeader::kOatLocation));
Brian Carlstrom58ae9412011-10-04 00:56:06 -0700641 std::string oat_filename;
642 oat_filename += runtime->GetHostPrefix();
643 oat_filename += oat_location->ToModifiedUtf8();
Brian Carlstroma9f19782011-10-13 00:14:47 -0700644 OatFile* oat_file = OatFile::Open(oat_filename, "", image_header.GetOatBaseAddr());
Brian Carlstrom58ae9412011-10-04 00:56:06 -0700645 if (oat_file == NULL) {
Brian Carlstroma9f19782011-10-13 00:14:47 -0700646 LOG(ERROR) << "Failed to open oat file " << oat_filename << " referenced from image.";
Brian Carlstrom58ae9412011-10-04 00:56:06 -0700647 return NULL;
648 }
649 uint32_t oat_checksum = oat_file->GetOatHeader().GetChecksum();
650 uint32_t image_oat_checksum = image_header.GetOatChecksum();
651 if (oat_checksum != image_oat_checksum) {
Brian Carlstrom866c8622012-01-06 16:35:13 -0800652 LOG(ERROR) << "Failed to match oat file checksum " << std::hex << oat_checksum
Brian Carlstrom58ae9412011-10-04 00:56:06 -0700653 << " to expected oat checksum " << std::hex << oat_checksum
654 << " in image";
655 return NULL;
656 }
Brian Carlstrom866c8622012-01-06 16:35:13 -0800657 RegisterOatFileLocked(*oat_file);
Elliott Hughes4dd9b4d2011-12-12 18:29:24 -0800658 VLOG(startup) << "ClassLinker::OpenOat exiting";
Brian Carlstrom58ae9412011-10-04 00:56:06 -0700659 return oat_file;
660}
661
Brian Carlstromae826982011-11-09 01:33:42 -0800662const OatFile* ClassLinker::FindOpenedOatFileForDexFile(const DexFile& dex_file) {
663 for (size_t i = 0; i < oat_files_.size(); i++) {
664 const OatFile* oat_file = oat_files_[i];
665 DCHECK(oat_file != NULL);
Ian Rogers7fe2c692011-12-06 16:35:59 -0800666 if (oat_file->GetOatDexFile(dex_file.GetLocation(), false)) {
Brian Carlstromae826982011-11-09 01:33:42 -0800667 return oat_file;
668 }
669 }
670 return NULL;
671}
672
Brian Carlstromd601af82012-01-06 10:15:19 -0800673class LockedFd {
674 public:
675 static LockedFd* CreateAndLock(std::string& name, mode_t mode) {
676 int fd = open(name.c_str(), O_CREAT | O_RDWR, mode);
677 if (fd == -1) {
678 PLOG(ERROR) << "Failed to open file '" << name << "'";
679 return NULL;
680 }
681 fchmod(fd, mode);
682
683 LOG(INFO) << "locking file " << name << " (fd=" << fd << ")";
684 // try to lock non-blocking so we can log if we need may need to block
685 int result = flock(fd, LOCK_EX | LOCK_NB);
686 if (result == -1) {
687 LOG(WARNING) << "sleeping while locking file " << name;
688 // retry blocking
689 result = flock(fd, LOCK_EX);
690 }
691 if (result == -1) {
692 PLOG(ERROR) << "Failed to lock file '" << name << "'";
693 close(fd);
694 return NULL;
695 }
696 return new LockedFd(fd);
697 }
698
699 int GetFd() const {
700 return fd_;
701 }
702
703 ~LockedFd() {
704 if (fd_ != -1) {
705 int result = flock(fd_, LOCK_UN);
706 if (result == -1) {
707 PLOG(WARNING) << "flock(" << fd_ << ", LOCK_UN) failed";
708 }
709 close(fd_);
710 }
711 }
712
713 private:
714 explicit LockedFd(int fd) : fd_(fd) {}
715
716 int fd_;
717};
718
Brian Carlstromae826982011-11-09 01:33:42 -0800719const OatFile* ClassLinker::FindOatFileForDexFile(const DexFile& dex_file) {
Brian Carlstrom47d237a2011-10-18 15:08:33 -0700720 MutexLock mu(dex_lock_);
Brian Carlstrom866c8622012-01-06 16:35:13 -0800721 const OatFile* open_oat_file = FindOpenedOatFileForDexFile(dex_file);
722 if (open_oat_file != NULL) {
723 return open_oat_file;
Brian Carlstromae826982011-11-09 01:33:42 -0800724 }
725
Brian Carlstromd601af82012-01-06 10:15:19 -0800726 std::string oat_filename(OatFile::DexFilenameToOatFilename(dex_file.GetLocation()));
Brian Carlstrom866c8622012-01-06 16:35:13 -0800727 open_oat_file = FindOpenedOatFileFromOatLocation(oat_filename);
728 if (open_oat_file != NULL) {
729 return open_oat_file;
730 }
731
Brian Carlstromd601af82012-01-06 10:15:19 -0800732 while (true) {
Brian Carlstrom866c8622012-01-06 16:35:13 -0800733 UniquePtr<const OatFile> oat_file(FindOatFileFromOatLocation(oat_filename));
734 if (oat_file.get() != NULL) {
Brian Carlstromd601af82012-01-06 10:15:19 -0800735 const OatFile::OatDexFile* oat_dex_file = oat_file->GetOatDexFile(dex_file.GetLocation());
736 if (dex_file.GetHeader().checksum_ == oat_dex_file->GetDexFileChecksum()) {
Brian Carlstrom866c8622012-01-06 16:35:13 -0800737 RegisterOatFileLocked(*oat_file.get());
738 return oat_file.release();
Brian Carlstromd601af82012-01-06 10:15:19 -0800739 }
740 LOG(WARNING) << ".oat file " << oat_file->GetLocation()
741 << " checksum mismatch with " << dex_file.GetLocation() << " --- regenerating";
742 if (TEMP_FAILURE_RETRY(unlink(oat_file->GetLocation().c_str())) != 0) {
743 PLOG(FATAL) << "Couldn't remove obsolete .oat file " << oat_file->GetLocation();
744 }
745 // Fall through...
Elliott Hughesed6d78e2011-10-25 17:35:14 -0700746 }
Brian Carlstromd601af82012-01-06 10:15:19 -0800747 // Try to generate oat file if it wasn't found or was obsolete.
748 // Note we can be racing with another runtime to do this.
749 std::string oat_cache_filename(GetArtCacheFilenameOrDie(oat_filename));
750 UniquePtr<LockedFd> locked_fd(LockedFd::CreateAndLock(oat_cache_filename, 0644));
751 if (locked_fd.get() == NULL) {
752 LOG(ERROR) << "Failed to create and lock oat file " << oat_cache_filename;
753 return NULL;
Elliott Hughes234da572011-11-03 22:13:06 -0700754 }
Brian Carlstromd601af82012-01-06 10:15:19 -0800755 // Check to see if the fd we opened and locked matches the file in
756 // the filesystem. If they don't, then somebody else unlinked ours
757 // and created a new file, and we need to use that one instead. (If
758 // we caught them between the unlink and the create, we'll get an
759 // ENOENT from the file stat.)
760 struct stat fd_stat;
761 int fd_stat_result = fstat(locked_fd->GetFd(), &fd_stat);
762 if (fd_stat_result != 0) {
763 PLOG(ERROR) << "Failed to fstat file descriptor of oat file " << oat_cache_filename;
764 return NULL;
765 }
766 struct stat file_stat;
767 int file_stat_result = stat(oat_cache_filename.c_str(), &file_stat);
768 if (file_stat_result != 0
769 || fd_stat.st_dev != file_stat.st_dev
770 || fd_stat.st_ino != file_stat.st_ino) {
771 LOG(INFO) << "Opened oat file " << oat_cache_filename << " is stale; sleeping and retrying";
772 usleep(250 * 1000); // if something is hosed, don't peg machine
773 continue;
774 }
775
776 // We have the correct file open and locked. If the file size is
777 // zero, then it was just created by us and we can generate its
778 // contents. If not, someone else created it. Either way, we'll
779 // loop to retry opening the file.
780 if (fd_stat.st_size == 0) {
781 bool success = GenerateOatFile(dex_file.GetLocation(),
782 locked_fd->GetFd(),
783 oat_cache_filename);
784 if (!success) {
785 LOG(ERROR) << "Failed to generate oat file " << oat_cache_filename;
786 return NULL;
787 }
788 }
jeffhao262bf462011-10-20 18:36:32 -0700789 }
Brian Carlstromd601af82012-01-06 10:15:19 -0800790 // Not reached
Brian Carlstromaded5f72011-10-07 17:15:04 -0700791}
792
Brian Carlstromae826982011-11-09 01:33:42 -0800793const OatFile* ClassLinker::FindOpenedOatFileFromOatLocation(const std::string& oat_location) {
Brian Carlstromaded5f72011-10-07 17:15:04 -0700794 for (size_t i = 0; i < oat_files_.size(); i++) {
795 const OatFile* oat_file = oat_files_[i];
796 DCHECK(oat_file != NULL);
Brian Carlstromae826982011-11-09 01:33:42 -0800797 if (oat_file->GetLocation() == oat_location) {
Brian Carlstromaded5f72011-10-07 17:15:04 -0700798 return oat_file;
799 }
800 }
Brian Carlstromfad71432011-10-16 20:25:10 -0700801 return NULL;
802}
Brian Carlstromaded5f72011-10-07 17:15:04 -0700803
Brian Carlstromae826982011-11-09 01:33:42 -0800804const OatFile* ClassLinker::FindOatFileFromOatLocation(const std::string& oat_location) {
Brian Carlstrom866c8622012-01-06 16:35:13 -0800805 const OatFile* oat_file = OatFile::Open(oat_location, "", NULL);
Brian Carlstromaded5f72011-10-07 17:15:04 -0700806 if (oat_file == NULL) {
Brian Carlstromae826982011-11-09 01:33:42 -0800807 if (oat_location.empty() || oat_location[0] != '/') {
808 LOG(ERROR) << "Failed to open oat file from " << oat_location;
Brian Carlstroma9f19782011-10-13 00:14:47 -0700809 return NULL;
810 }
Brian Carlstromfad71432011-10-16 20:25:10 -0700811
Brian Carlstroma9f19782011-10-13 00:14:47 -0700812 // not found in /foo/bar/baz.oat? try /data/art-cache/foo@bar@baz.oat
Elliott Hughes95572412011-12-13 18:14:20 -0800813 std::string cache_location(GetArtCacheFilenameOrDie(oat_location));
Brian Carlstromae826982011-11-09 01:33:42 -0800814 oat_file = FindOpenedOatFileFromOatLocation(cache_location);
Brian Carlstromfad71432011-10-16 20:25:10 -0700815 if (oat_file != NULL) {
816 return oat_file;
817 }
Brian Carlstroma9f19782011-10-13 00:14:47 -0700818 oat_file = OatFile::Open(cache_location, "", NULL);
819 if (oat_file == NULL) {
Brian Carlstromae826982011-11-09 01:33:42 -0800820 LOG(INFO) << "Failed to open oat file from " << oat_location << " or " << cache_location << ".";
Brian Carlstroma9f19782011-10-13 00:14:47 -0700821 return NULL;
822 }
Brian Carlstromaded5f72011-10-07 17:15:04 -0700823 }
Brian Carlstromfad71432011-10-16 20:25:10 -0700824
Brian Carlstromae826982011-11-09 01:33:42 -0800825 CHECK(oat_file != NULL) << oat_location;
Brian Carlstromaded5f72011-10-07 17:15:04 -0700826 return oat_file;
827}
828
Brian Carlstrom58ae9412011-10-04 00:56:06 -0700829void ClassLinker::InitFromImage() {
Elliott Hughes4dd9b4d2011-12-12 18:29:24 -0800830 VLOG(startup) << "ClassLinker::InitFromImage entering";
Brian Carlstroma663ea52011-08-19 23:33:41 -0700831 CHECK(!init_done_);
832
Brian Carlstrom58ae9412011-10-04 00:56:06 -0700833 const std::vector<Space*>& spaces = Heap::GetSpaces();
834 for (size_t i = 0; i < spaces.size(); i++) {
Elliott Hughesba8eee12012-01-24 20:25:24 -0800835 Space* space = spaces[i];
Brian Carlstrom58ae9412011-10-04 00:56:06 -0700836 if (space->IsImageSpace()) {
837 OatFile* oat_file = OpenOat(space);
838 CHECK(oat_file != NULL) << "Failed to open oat file for image";
839 Object* dex_caches_object = space->GetImageHeader().GetImageRoot(ImageHeader::kDexCaches);
840 ObjectArray<DexCache>* dex_caches = dex_caches_object->AsObjectArray<DexCache>();
841
Ian Rogers6d4d9fc2011-11-30 16:24:48 -0800842 if (i == 0) {
843 // Special case of setting up the String class early so that we can test arbitrary objects
844 // as being Strings or not
845 Class* java_lang_String = spaces[0]->GetImageHeader().GetImageRoot(ImageHeader::kClassRoots)
846 ->AsObjectArray<Class>()->Get(kJavaLangString);
847 String::SetClass(java_lang_String);
848 }
849
Brian Carlstrom58ae9412011-10-04 00:56:06 -0700850 CHECK_EQ(oat_file->GetOatHeader().GetDexFileCount(),
851 static_cast<uint32_t>(dex_caches->GetLength()));
852 for (int i = 0; i < dex_caches->GetLength(); i++) {
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700853 SirtRef<DexCache> dex_cache(dex_caches->Get(i));
Elliott Hughes95572412011-12-13 18:14:20 -0800854 const std::string& dex_file_location(dex_cache->GetLocation()->ToModifiedUtf8());
Brian Carlstrom89521892011-12-07 22:05:07 -0800855 const OatFile::OatDexFile* oat_dex_file = oat_file->GetOatDexFile(dex_file_location);
856 const DexFile* dex_file = oat_dex_file->OpenDexFile();
Brian Carlstrom58ae9412011-10-04 00:56:06 -0700857 if (dex_file == NULL) {
Brian Carlstrom89521892011-12-07 22:05:07 -0800858 LOG(FATAL) << "Failed to open dex file " << dex_file_location
859 << " from within oat file " << oat_file->GetLocation();
Brian Carlstrom58ae9412011-10-04 00:56:06 -0700860 }
861
Brian Carlstromaded5f72011-10-07 17:15:04 -0700862 CHECK_EQ(dex_file->GetHeader().checksum_, oat_dex_file->GetDexFileChecksum());
Brian Carlstrom58ae9412011-10-04 00:56:06 -0700863
Brian Carlstromdf143242011-10-10 18:05:34 -0700864 AppendToBootClassPath(*dex_file, dex_cache);
Brian Carlstrom58ae9412011-10-04 00:56:06 -0700865 }
866 }
867 }
868
Brian Carlstroma663ea52011-08-19 23:33:41 -0700869 HeapBitmap* heap_bitmap = Heap::GetLiveBits();
870 DCHECK(heap_bitmap != NULL);
871
Brian Carlstroma663ea52011-08-19 23:33:41 -0700872 // reinit clases_ table
Brian Carlstrom34f426c2011-10-04 12:58:02 -0700873 heap_bitmap->Walk(InitFromImageCallback, this);
Brian Carlstroma663ea52011-08-19 23:33:41 -0700874
875 // reinit class_roots_
Brian Carlstrom34f426c2011-10-04 12:58:02 -0700876 Object* class_roots_object = spaces[0]->GetImageHeader().GetImageRoot(ImageHeader::kClassRoots);
877 class_roots_ = class_roots_object->AsObjectArray<Class>();
Brian Carlstroma663ea52011-08-19 23:33:41 -0700878
Ian Rogers6d4d9fc2011-11-30 16:24:48 -0800879 // reinit array_iftable_ from any array class instance, they should be ==
Elliott Hughes92f14b22011-10-06 12:29:54 -0700880 array_iftable_ = GetClassRoot(kObjectArrayClass)->GetIfTable();
881 DCHECK(array_iftable_ == GetClassRoot(kBooleanArrayClass)->GetIfTable());
Ian Rogers6d4d9fc2011-11-30 16:24:48 -0800882 // String class root was set above
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700883 Field::SetClass(GetClassRoot(kJavaLangReflectField));
Elliott Hughes80609252011-09-23 17:24:51 -0700884 Method::SetClasses(GetClassRoot(kJavaLangReflectConstructor), GetClassRoot(kJavaLangReflectMethod));
Brian Carlstroma663ea52011-08-19 23:33:41 -0700885 BooleanArray::SetArrayClass(GetClassRoot(kBooleanArrayClass));
886 ByteArray::SetArrayClass(GetClassRoot(kByteArrayClass));
887 CharArray::SetArrayClass(GetClassRoot(kCharArrayClass));
888 DoubleArray::SetArrayClass(GetClassRoot(kDoubleArrayClass));
889 FloatArray::SetArrayClass(GetClassRoot(kFloatArrayClass));
890 IntArray::SetArrayClass(GetClassRoot(kIntArrayClass));
891 LongArray::SetArrayClass(GetClassRoot(kLongArrayClass));
892 ShortArray::SetArrayClass(GetClassRoot(kShortArrayClass));
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -0700893 PathClassLoader::SetClass(GetClassRoot(kDalvikSystemPathClassLoader));
Shih-wei Liao55df06b2011-08-26 14:39:27 -0700894 StackTraceElement::SetClass(GetClassRoot(kJavaLangStackTraceElement));
Brian Carlstroma663ea52011-08-19 23:33:41 -0700895
896 FinishInit();
Brian Carlstrom0a5b14d2011-09-27 13:29:15 -0700897
Elliott Hughes4dd9b4d2011-12-12 18:29:24 -0800898 VLOG(startup) << "ClassLinker::InitFromImage exiting";
Brian Carlstroma663ea52011-08-19 23:33:41 -0700899}
900
Brian Carlstrom78128a62011-09-15 17:21:19 -0700901void ClassLinker::InitFromImageCallback(Object* obj, void* arg) {
Brian Carlstroma663ea52011-08-19 23:33:41 -0700902 DCHECK(obj != NULL);
903 DCHECK(arg != NULL);
Brian Carlstrom34f426c2011-10-04 12:58:02 -0700904 ClassLinker* class_linker = reinterpret_cast<ClassLinker*>(arg);
Brian Carlstroma663ea52011-08-19 23:33:41 -0700905
Elliott Hughesdbb40792011-11-18 17:05:22 -0800906 if (obj->GetClass()->IsStringClass()) {
Brian Carlstrom34f426c2011-10-04 12:58:02 -0700907 class_linker->intern_table_->RegisterStrong(obj->AsString());
Brian Carlstromc74255f2011-09-11 22:47:39 -0700908 return;
909 }
Brian Carlstromaded5f72011-10-07 17:15:04 -0700910 if (obj->IsClass()) {
911 // restore class to ClassLinker::classes_ table
912 Class* klass = obj->AsClass();
Elliott Hughesc3b77c72011-12-15 20:56:48 -0800913 ClassHelper kh(klass, class_linker);
Brian Carlstrom07bb8552012-01-18 22:10:50 -0800914 Class* existing = class_linker->InsertClass(kh.GetDescriptor(), klass, true);
915 DCHECK(existing == NULL) << kh.GetDescriptor();
Brian Carlstroma663ea52011-08-19 23:33:41 -0700916 return;
917 }
Brian Carlstroma663ea52011-08-19 23:33:41 -0700918}
919
920// Keep in sync with InitCallback. Anything we visit, we need to
921// reinit references to when reinitializing a ClassLinker from a
922// mapped image.
Elliott Hughes410c0c82011-09-01 17:58:25 -0700923void ClassLinker::VisitRoots(Heap::RootVisitor* visitor, void* arg) const {
924 visitor(class_roots_, arg);
Brian Carlstrom75cb3b42011-07-28 02:13:36 -0700925
926 for (size_t i = 0; i < dex_caches_.size(); i++) {
Elliott Hughes410c0c82011-09-01 17:58:25 -0700927 visitor(dex_caches_[i], arg);
Brian Carlstrom75cb3b42011-07-28 02:13:36 -0700928 }
929
Brian Carlstrom7e93b502011-08-04 14:16:22 -0700930 {
Brian Carlstrom47d237a2011-10-18 15:08:33 -0700931 MutexLock mu(classes_lock_);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700932 typedef Table::const_iterator It; // TODO: C++0x auto
Brian Carlstrom7e93b502011-08-04 14:16:22 -0700933 for (It it = classes_.begin(), end = classes_.end(); it != end; ++it) {
Elliott Hughes410c0c82011-09-01 17:58:25 -0700934 visitor(it->second, arg);
Brian Carlstrom7e93b502011-08-04 14:16:22 -0700935 }
Ian Rogers5d76c432011-10-31 21:42:49 -0700936 // Note. we deliberately ignore the class roots in the image (held in image_classes_)
Brian Carlstrom75cb3b42011-07-28 02:13:36 -0700937 }
Brian Carlstrom7e93b502011-08-04 14:16:22 -0700938
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700939 visitor(array_iftable_, arg);
Brian Carlstrom578bbdc2011-07-21 14:07:47 -0700940}
941
Elliott Hughesa2155262011-11-16 16:26:58 -0800942void ClassLinker::VisitClasses(ClassVisitor* visitor, void* arg) const {
943 MutexLock mu(classes_lock_);
944 typedef Table::const_iterator It; // TODO: C++0x auto
945 for (It it = classes_.begin(), end = classes_.end(); it != end; ++it) {
946 if (!visitor(it->second, arg)) {
947 return;
948 }
949 }
950 for (It it = image_classes_.begin(), end = image_classes_.end(); it != end; ++it) {
951 if (!visitor(it->second, arg)) {
952 return;
953 }
954 }
955}
956
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -0700957ClassLinker::~ClassLinker() {
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -0700958 String::ResetClass();
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700959 Field::ResetClass();
Elliott Hughes80609252011-09-23 17:24:51 -0700960 Method::ResetClasses();
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -0700961 BooleanArray::ResetArrayClass();
962 ByteArray::ResetArrayClass();
963 CharArray::ResetArrayClass();
964 DoubleArray::ResetArrayClass();
965 FloatArray::ResetArrayClass();
966 IntArray::ResetArrayClass();
967 LongArray::ResetArrayClass();
968 ShortArray::ResetArrayClass();
969 PathClassLoader::ResetClass();
Shih-wei Liao55df06b2011-08-26 14:39:27 -0700970 StackTraceElement::ResetClass();
Brian Carlstrom58ae9412011-10-04 00:56:06 -0700971 STLDeleteElements(&boot_class_path_);
972 STLDeleteElements(&oat_files_);
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -0700973}
974
975DexCache* ClassLinker::AllocDexCache(const DexFile& dex_file) {
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700976 SirtRef<DexCache> dex_cache(down_cast<DexCache*>(AllocObjectArray<Object>(DexCache::LengthAsArray())));
977 if (dex_cache.get() == NULL) {
Elliott Hughes30646832011-10-13 16:59:46 -0700978 return NULL;
979 }
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700980 SirtRef<String> location(intern_table_->InternStrong(dex_file.GetLocation().c_str()));
981 if (location.get() == NULL) {
Elliott Hughes30646832011-10-13 16:59:46 -0700982 return NULL;
983 }
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700984 SirtRef<ObjectArray<String> > strings(AllocObjectArray<String>(dex_file.NumStringIds()));
985 if (strings.get() == NULL) {
986 return NULL;
987 }
988 SirtRef<ObjectArray<Class> > types(AllocClassArray(dex_file.NumTypeIds()));
989 if (types.get() == NULL) {
990 return NULL;
991 }
992 SirtRef<ObjectArray<Method> > methods(AllocObjectArray<Method>(dex_file.NumMethodIds()));
993 if (methods.get() == NULL) {
994 return NULL;
995 }
996 SirtRef<ObjectArray<Field> > fields(AllocObjectArray<Field>(dex_file.NumFieldIds()));
997 if (fields.get() == NULL) {
998 return NULL;
999 }
1000 SirtRef<CodeAndDirectMethods> code_and_direct_methods(AllocCodeAndDirectMethods(dex_file.NumMethodIds()));
1001 if (code_and_direct_methods.get() == NULL) {
1002 return NULL;
1003 }
1004 SirtRef<ObjectArray<StaticStorageBase> > initialized_static_storage(AllocObjectArray<StaticStorageBase>(dex_file.NumTypeIds()));
1005 if (initialized_static_storage.get() == NULL) {
1006 return NULL;
1007 }
1008
1009 dex_cache->Init(location.get(),
1010 strings.get(),
1011 types.get(),
1012 methods.get(),
1013 fields.get(),
1014 code_and_direct_methods.get(),
1015 initialized_static_storage.get());
1016 return dex_cache.get();
Brian Carlstroma0808032011-07-18 00:39:23 -07001017}
1018
Brian Carlstrom9cc262e2011-08-28 12:45:30 -07001019CodeAndDirectMethods* ClassLinker::AllocCodeAndDirectMethods(size_t length) {
1020 return down_cast<CodeAndDirectMethods*>(IntArray::Alloc(CodeAndDirectMethods::LengthAsArray(length)));
Brian Carlstrom83db7722011-08-26 17:32:56 -07001021}
1022
Brian Carlstrom4b620ff2011-09-11 01:11:01 -07001023InterfaceEntry* ClassLinker::AllocInterfaceEntry(Class* interface) {
1024 DCHECK(interface->IsInterface());
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001025 SirtRef<ObjectArray<Object> > array(AllocObjectArray<Object>(InterfaceEntry::LengthAsArray()));
1026 SirtRef<InterfaceEntry> interface_entry(down_cast<InterfaceEntry*>(array.get()));
Brian Carlstrom4b620ff2011-09-11 01:11:01 -07001027 interface_entry->SetInterface(interface);
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001028 return interface_entry.get();
Brian Carlstrom4b620ff2011-09-11 01:11:01 -07001029}
1030
Brian Carlstrom4873d462011-08-21 15:23:39 -07001031Class* ClassLinker::AllocClass(Class* java_lang_Class, size_t class_size) {
1032 DCHECK_GE(class_size, sizeof(Class));
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001033 SirtRef<Class> klass(Heap::AllocObject(java_lang_Class, class_size)->AsClass());
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07001034 klass->SetPrimitiveType(Primitive::kPrimNot); // default to not being primitive
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07001035 klass->SetClassSize(class_size);
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001036 return klass.get();
Brian Carlstrom75cb3b42011-07-28 02:13:36 -07001037}
1038
Brian Carlstrom4873d462011-08-21 15:23:39 -07001039Class* ClassLinker::AllocClass(size_t class_size) {
1040 return AllocClass(GetClassRoot(kJavaLangClass), class_size);
Brian Carlstroma0808032011-07-18 00:39:23 -07001041}
1042
Jesse Wilson35baaab2011-08-10 16:18:03 -04001043Field* ClassLinker::AllocField() {
Brian Carlstrom1f870082011-08-23 16:02:11 -07001044 return down_cast<Field*>(GetClassRoot(kJavaLangReflectField)->AllocObject());
Brian Carlstroma0808032011-07-18 00:39:23 -07001045}
1046
1047Method* ClassLinker::AllocMethod() {
Brian Carlstrom1f870082011-08-23 16:02:11 -07001048 return down_cast<Method*>(GetClassRoot(kJavaLangReflectMethod)->AllocObject());
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001049}
1050
Shih-wei Liao55df06b2011-08-26 14:39:27 -07001051ObjectArray<StackTraceElement>* ClassLinker::AllocStackTraceElementArray(size_t length) {
1052 return ObjectArray<StackTraceElement>::Alloc(
1053 GetClassRoot(kJavaLangStackTraceElementArrayClass),
1054 length);
1055}
1056
Brian Carlstromaded5f72011-10-07 17:15:04 -07001057Class* EnsureResolved(Class* klass) {
1058 DCHECK(klass != NULL);
1059 // Wait for the class if it has not already been linked.
Carl Shapirob5573532011-07-12 18:22:59 -07001060 Thread* self = Thread::Current();
Elliott Hughes5fe594f2011-09-08 12:33:17 -07001061 if (!klass->IsResolved() && !klass->IsErroneous()) {
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07001062 ObjectLock lock(klass);
1063 // Check for circular dependencies between classes.
Elliott Hughes5fe594f2011-09-08 12:33:17 -07001064 if (!klass->IsResolved() && klass->GetClinitThreadId() == self->GetTid()) {
Elliott Hughes5cb5ad22011-10-02 12:13:39 -07001065 self->ThrowNewException("Ljava/lang/ClassCircularityError;",
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08001066 PrettyDescriptor(klass).c_str());
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07001067 return NULL;
1068 }
1069 // Wait for the pending initialization to complete.
Elliott Hughes5fe594f2011-09-08 12:33:17 -07001070 while (!klass->IsResolved() && !klass->IsErroneous()) {
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07001071 lock.Wait();
1072 }
1073 }
1074 if (klass->IsErroneous()) {
Elliott Hughes4a2b4172011-09-20 17:08:25 -07001075 ThrowEarlierClassFailure(klass);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07001076 return NULL;
1077 }
1078 // Return the loaded class. No exceptions should be pending.
Brian Carlstromaded5f72011-10-07 17:15:04 -07001079 CHECK(klass->IsResolved()) << PrettyClass(klass);
1080 CHECK(!self->IsExceptionPending())
1081 << PrettyClass(klass) << " " << PrettyTypeOf(self->GetException());
1082 return klass;
1083}
1084
Elliott Hughesdb7d5e92011-12-16 18:47:37 -08001085Class* ClassLinker::FindSystemClass(const char* descriptor) {
1086 return FindClass(descriptor, NULL);
1087}
1088
Elliott Hughesc3b77c72011-12-15 20:56:48 -08001089Class* ClassLinker::FindClass(const char* descriptor, const ClassLoader* class_loader) {
Elliott Hughesba8eee12012-01-24 20:25:24 -08001090 DCHECK_NE(*descriptor, '\0') << "descriptor is empty string";
Brian Carlstromaded5f72011-10-07 17:15:04 -07001091 Thread* self = Thread::Current();
1092 DCHECK(self != NULL);
1093 CHECK(!self->IsExceptionPending()) << PrettyTypeOf(self->GetException());
Elliott Hughesc3b77c72011-12-15 20:56:48 -08001094 if (descriptor[1] == '\0') {
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08001095 // only the descriptors of primitive types should be 1 character long, also avoid class lookup
1096 // for primitive classes that aren't backed by dex files.
1097 return FindPrimitiveClass(descriptor[0]);
1098 }
Brian Carlstromaded5f72011-10-07 17:15:04 -07001099 // Find the class in the loaded classes table.
1100 Class* klass = LookupClass(descriptor, class_loader);
1101 if (klass != NULL) {
1102 return EnsureResolved(klass);
1103 }
Brian Carlstromaded5f72011-10-07 17:15:04 -07001104 // Class is not yet loaded.
Elliott Hughesa7679b62012-01-24 17:15:23 -08001105 JNIEnv* env = self->GetJniEnv();
1106 ScopedLocalRef<jthrowable> cause(env, NULL);
Brian Carlstromaded5f72011-10-07 17:15:04 -07001107 if (descriptor[0] == '[') {
1108 return CreateArrayClass(descriptor, class_loader);
Brian Carlstromaded5f72011-10-07 17:15:04 -07001109
Jesse Wilson47daf872011-11-23 11:42:45 -05001110 } else if (class_loader == NULL) {
1111 DexFile::ClassPathEntry pair = DexFile::FindInClassPath(descriptor, boot_class_path_);
1112 if (pair.second != NULL) {
1113 return DefineClass(descriptor, NULL, *pair.first, *pair.second);
1114 }
1115
1116 } else if (ClassLoader::UseCompileTimeClassPath()) {
1117 // first try the boot class path
1118 Class* system_class = FindSystemClass(descriptor);
1119 if (system_class != NULL) {
1120 return system_class;
1121 }
1122 CHECK(self->IsExceptionPending());
1123 self->ClearException();
1124
1125 // next try the compile time class path
Brian Carlstromaded5f72011-10-07 17:15:04 -07001126 const std::vector<const DexFile*>& class_path
1127 = ClassLoader::GetCompileTimeClassPath(class_loader);
1128 DexFile::ClassPathEntry pair = DexFile::FindInClassPath(descriptor, class_path);
Jesse Wilson47daf872011-11-23 11:42:45 -05001129 if (pair.second != NULL) {
1130 return DefineClass(descriptor, class_loader, *pair.first, *pair.second);
Brian Carlstromaded5f72011-10-07 17:15:04 -07001131 }
Jesse Wilson47daf872011-11-23 11:42:45 -05001132
1133 } else {
Elliott Hughes95572412011-12-13 18:14:20 -08001134 std::string class_name_string(DescriptorToDot(descriptor));
Jesse Wilson47daf872011-11-23 11:42:45 -05001135 ScopedThreadStateChange(self, Thread::kNative);
Jesse Wilson47daf872011-11-23 11:42:45 -05001136 ScopedLocalRef<jclass> c(env, AddLocalReference<jclass>(env, GetClassRoot(kJavaLangClassLoader)));
1137 CHECK(c.get() != NULL);
1138 // TODO: cache method?
1139 jmethodID mid = env->GetMethodID(c.get(), "loadClass", "(Ljava/lang/String;)Ljava/lang/Class;");
1140 CHECK(mid != NULL);
1141 ScopedLocalRef<jobject> class_name_object(env, env->NewStringUTF(class_name_string.c_str()));
1142 if (class_name_object.get() == NULL) {
1143 return NULL;
1144 }
1145 ScopedLocalRef<jobject> class_loader_object(env, AddLocalReference<jobject>(env, class_loader));
Ian Rogers761bfa82012-01-11 10:14:05 -08001146 ScopedLocalRef<jobject> result(env, env->CallObjectMethod(class_loader_object.get(), mid,
1147 class_name_object.get()));
Elliott Hughesa7679b62012-01-24 17:15:23 -08001148 cause.reset(env->ExceptionOccurred());
1149 if (cause.get() != NULL) {
Elliott Hughes7bfc9632012-01-26 12:02:54 -08001150 // Throw LinkageErrors unmolested...
Elliott Hughesa7679b62012-01-24 17:15:23 -08001151 env->ExceptionClear();
Elliott Hughes7bfc9632012-01-26 12:02:54 -08001152 static jclass LinkageError_class = CacheClass(env, "java/lang/LinkageError");
1153 if (env->IsInstanceOf(cause.get(), LinkageError_class)) {
1154 env->Throw(cause.get());
1155 return NULL;
1156 }
1157 // ...otherwise fall through and throw NCDFE.
Ian Rogers761bfa82012-01-11 10:14:05 -08001158 } else if (result.get() == NULL) {
Ian Rogerscab01012012-01-10 17:35:46 -08001159 // broken loader - throw NPE to be compatible with Dalvik
1160 ThrowNullPointerException("ClassLoader.loadClass returned null for %s",
1161 class_name_string.c_str());
1162 return NULL;
Ian Rogers761bfa82012-01-11 10:14:05 -08001163 } else {
Ian Rogerscab01012012-01-10 17:35:46 -08001164 // success, return Class*
Ian Rogers6b0870d2011-12-15 19:38:12 -08001165 return Decode<Class*>(env, result.get());
Ian Rogers6b0870d2011-12-15 19:38:12 -08001166 }
Brian Carlstromaded5f72011-10-07 17:15:04 -07001167 }
1168
Elliott Hughesc3b77c72011-12-15 20:56:48 -08001169 ThrowNoClassDefFoundError("Class %s not found", PrintableString(StringPiece(descriptor)).c_str());
Elliott Hughesa7679b62012-01-24 17:15:23 -08001170 if (cause.get() != NULL) {
1171 // Initialize the cause of the NCDFE.
1172 ScopedLocalRef<jthrowable> ncdfe(env, env->ExceptionOccurred());
1173 env->ExceptionClear();
Elliott Hughes844f9a02012-01-24 20:19:58 -08001174 static jmethodID initCause_mid = env->GetMethodID(env->FindClass("java/lang/Throwable"), "initCause", "(Ljava/lang/Throwable;)Ljava/lang/Throwable;");
Elliott Hughesa7679b62012-01-24 17:15:23 -08001175 env->CallObjectMethod(ncdfe.get(), initCause_mid, cause.get());
1176 env->Throw(ncdfe.get());
1177 }
Jesse Wilson47daf872011-11-23 11:42:45 -05001178 return NULL;
Brian Carlstromaded5f72011-10-07 17:15:04 -07001179}
1180
Elliott Hughesc3b77c72011-12-15 20:56:48 -08001181Class* ClassLinker::DefineClass(const StringPiece& descriptor,
Brian Carlstromaded5f72011-10-07 17:15:04 -07001182 const ClassLoader* class_loader,
1183 const DexFile& dex_file,
1184 const DexFile::ClassDef& dex_class_def) {
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001185 SirtRef<Class> klass(NULL);
Brian Carlstromaded5f72011-10-07 17:15:04 -07001186 // Load the class from the dex file.
1187 if (!init_done_) {
1188 // finish up init of hand crafted class_roots_
1189 if (descriptor == "Ljava/lang/Object;") {
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001190 klass.reset(GetClassRoot(kJavaLangObject));
Brian Carlstromaded5f72011-10-07 17:15:04 -07001191 } else if (descriptor == "Ljava/lang/Class;") {
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001192 klass.reset(GetClassRoot(kJavaLangClass));
Brian Carlstromaded5f72011-10-07 17:15:04 -07001193 } else if (descriptor == "Ljava/lang/String;") {
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001194 klass.reset(GetClassRoot(kJavaLangString));
Brian Carlstromaded5f72011-10-07 17:15:04 -07001195 } else if (descriptor == "Ljava/lang/reflect/Constructor;") {
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001196 klass.reset(GetClassRoot(kJavaLangReflectConstructor));
Brian Carlstromaded5f72011-10-07 17:15:04 -07001197 } else if (descriptor == "Ljava/lang/reflect/Field;") {
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001198 klass.reset(GetClassRoot(kJavaLangReflectField));
Brian Carlstromaded5f72011-10-07 17:15:04 -07001199 } else if (descriptor == "Ljava/lang/reflect/Method;") {
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001200 klass.reset(GetClassRoot(kJavaLangReflectMethod));
Brian Carlstromaded5f72011-10-07 17:15:04 -07001201 } else {
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001202 klass.reset(AllocClass(SizeOfClass(dex_file, dex_class_def)));
Brian Carlstromaded5f72011-10-07 17:15:04 -07001203 }
1204 } else {
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001205 klass.reset(AllocClass(SizeOfClass(dex_file, dex_class_def)));
Brian Carlstromaded5f72011-10-07 17:15:04 -07001206 }
1207 klass->SetDexCache(FindDexCache(dex_file));
1208 LoadClass(dex_file, dex_class_def, klass, class_loader);
1209 // Check for a pending exception during load
1210 Thread* self = Thread::Current();
1211 if (self->IsExceptionPending()) {
1212 return NULL;
1213 }
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001214 ObjectLock lock(klass.get());
Brian Carlstromaded5f72011-10-07 17:15:04 -07001215 klass->SetClinitThreadId(self->GetTid());
1216 // Add the newly loaded class to the loaded classes table.
Brian Carlstrom07bb8552012-01-18 22:10:50 -08001217 Class* existing = InsertClass(descriptor, klass.get(), false);
1218 if (existing != NULL) {
1219 // We failed to insert because we raced with another thread.
Brian Carlstromaded5f72011-10-07 17:15:04 -07001220 klass->SetClinitThreadId(0);
Brian Carlstrom07bb8552012-01-18 22:10:50 -08001221 klass.reset(existing);
1222 return EnsureResolved(klass.get());
Brian Carlstromaded5f72011-10-07 17:15:04 -07001223 }
1224 // Finish loading (if necessary) by finding parents
1225 CHECK(!klass->IsLoaded());
1226 if (!LoadSuperAndInterfaces(klass, dex_file)) {
1227 // Loading failed.
1228 CHECK(self->IsExceptionPending());
Ian Rogers28ad40d2011-10-27 15:19:26 -07001229 klass->SetStatus(Class::kStatusError);
Brian Carlstromaded5f72011-10-07 17:15:04 -07001230 lock.NotifyAll();
1231 return NULL;
1232 }
1233 CHECK(klass->IsLoaded());
1234 // Link the class (if necessary)
1235 CHECK(!klass->IsResolved());
Ian Rogersc2b44472011-12-14 21:17:17 -08001236 if (!LinkClass(klass, NULL)) {
Brian Carlstromaded5f72011-10-07 17:15:04 -07001237 // Linking failed.
1238 CHECK(self->IsExceptionPending());
Ian Rogers28ad40d2011-10-27 15:19:26 -07001239 klass->SetStatus(Class::kStatusError);
Brian Carlstromaded5f72011-10-07 17:15:04 -07001240 lock.NotifyAll();
1241 return NULL;
1242 }
1243 CHECK(klass->IsResolved());
Elliott Hughes4740cdf2011-12-07 14:07:12 -08001244
1245 /*
1246 * We send CLASS_PREPARE events to the debugger from here. The
1247 * definition of "preparation" is creating the static fields for a
1248 * class and initializing them to the standard default values, but not
1249 * executing any code (that comes later, during "initialization").
1250 *
1251 * We did the static preparation in LinkClass.
1252 *
1253 * The class has been prepared and resolved but possibly not yet verified
1254 * at this point.
1255 */
1256 Dbg::PostClassPrepare(klass.get());
1257
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001258 return klass.get();
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07001259}
1260
Brian Carlstrom4873d462011-08-21 15:23:39 -07001261// Precomputes size that will be needed for Class, matching LinkStaticFields
1262size_t ClassLinker::SizeOfClass(const DexFile& dex_file,
1263 const DexFile::ClassDef& dex_class_def) {
1264 const byte* class_data = dex_file.GetClassData(dex_class_def);
Brian Carlstrom4873d462011-08-21 15:23:39 -07001265 size_t num_ref = 0;
1266 size_t num_32 = 0;
1267 size_t num_64 = 0;
Ian Rogers0571d352011-11-03 19:51:38 -07001268 if (class_data != NULL) {
1269 for (ClassDataItemIterator it(dex_file, class_data); it.HasNextStaticField(); it.Next()) {
1270 const DexFile::FieldId& field_id = dex_file.GetFieldId(it.GetMemberIndex());
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07001271 const char* descriptor = dex_file.GetFieldTypeDescriptor(field_id);
Brian Carlstrom4873d462011-08-21 15:23:39 -07001272 char c = descriptor[0];
1273 if (c == 'L' || c == '[') {
1274 num_ref++;
1275 } else if (c == 'J' || c == 'D') {
1276 num_64++;
1277 } else {
1278 num_32++;
1279 }
1280 }
1281 }
Brian Carlstrom4873d462011-08-21 15:23:39 -07001282 // start with generic class data
1283 size_t size = sizeof(Class);
1284 // follow with reference fields which must be contiguous at start
1285 size += (num_ref * sizeof(uint32_t));
1286 // if there are 64-bit fields to add, make sure they are aligned
1287 if (num_64 != 0 && size != RoundUp(size, 8)) { // for 64-bit alignment
1288 if (num_32 != 0) {
1289 // use an available 32-bit field for padding
1290 num_32--;
1291 }
1292 size += sizeof(uint32_t); // either way, we are adding a word
1293 DCHECK_EQ(size, RoundUp(size, 8));
1294 }
1295 // tack on any 64-bit fields now that alignment is assured
1296 size += (num_64 * sizeof(uint64_t));
1297 // tack on any remaining 32-bit fields
1298 size += (num_32 * sizeof(uint32_t));
1299 return size;
1300}
1301
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001302void LinkCode(SirtRef<Method>& method, const OatFile::OatClass* oat_class, uint32_t method_index) {
Brian Carlstrom92827a52011-10-10 15:50:01 -07001303 // Every kind of method should at least get an invoke stub from the oat_method.
1304 // non-abstract methods also get their code pointers.
1305 const OatFile::OatMethod oat_method = oat_class->GetOatMethod(method_index);
Brian Carlstromae826982011-11-09 01:33:42 -08001306 oat_method.LinkMethodPointers(method.get());
Brian Carlstrom92827a52011-10-10 15:50:01 -07001307
1308 if (method->IsAbstract()) {
1309 method->SetCode(Runtime::Current()->GetAbstractMethodErrorStubArray()->GetData());
1310 return;
1311 }
1312 if (method->IsNative()) {
1313 // unregistering restores the dlsym lookup stub
1314 method->UnregisterNative();
jeffhao26c0a1a2012-01-17 16:28:33 -08001315 }
1316
1317 if (Runtime::Current()->IsMethodTracingActive()) {
1318#if defined(__arm__)
1319 Trace* tracer = Runtime::Current()->GetTracer();
1320 void* trace_stub = reinterpret_cast<void*>(art_trace_entry_from_code);
1321 tracer->SaveAndUpdateCode(method.get(), trace_stub);
1322#else
1323 UNIMPLEMENTED(WARNING);
1324#endif
Brian Carlstrom92827a52011-10-10 15:50:01 -07001325 }
1326}
1327
Brian Carlstromf615a612011-07-23 12:50:34 -07001328void ClassLinker::LoadClass(const DexFile& dex_file,
1329 const DexFile::ClassDef& dex_class_def,
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001330 SirtRef<Class>& klass,
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07001331 const ClassLoader* class_loader) {
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001332 CHECK(klass.get() != NULL);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07001333 CHECK(klass->GetDexCache() != NULL);
1334 CHECK_EQ(Class::kStatusNotReady, klass->GetStatus());
Brian Carlstromf615a612011-07-23 12:50:34 -07001335 const char* descriptor = dex_file.GetClassDescriptor(dex_class_def);
Brian Carlstrom934486c2011-07-12 23:42:50 -07001336 CHECK(descriptor != NULL);
1337
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07001338 klass->SetClass(GetClassRoot(kJavaLangClass));
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07001339 uint32_t access_flags = dex_class_def.access_flags_;
Elliott Hughes582a7d12011-10-10 18:38:42 -07001340 // Make sure that none of our runtime-only flags are set.
1341 CHECK_EQ(access_flags & ~kAccJavaFlagsMask, 0U);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07001342 klass->SetAccessFlags(access_flags);
1343 klass->SetClassLoader(class_loader);
Ian Rogersc2b44472011-12-14 21:17:17 -08001344 DCHECK_EQ(klass->GetPrimitiveType(), Primitive::kPrimNot);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07001345 klass->SetStatus(Class::kStatusIdx);
Brian Carlstrom934486c2011-07-12 23:42:50 -07001346
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08001347 klass->SetDexTypeIndex(dex_class_def.class_idx_);
Brian Carlstrom934486c2011-07-12 23:42:50 -07001348
Ian Rogers0571d352011-11-03 19:51:38 -07001349 // Load fields fields.
1350 const byte* class_data = dex_file.GetClassData(dex_class_def);
1351 if (class_data == NULL) {
1352 return; // no fields or methods - for example a marker interface
Brian Carlstrom934486c2011-07-12 23:42:50 -07001353 }
Ian Rogers0571d352011-11-03 19:51:38 -07001354 ClassDataItemIterator it(dex_file, class_data);
1355 if (it.NumStaticFields() != 0) {
1356 klass->SetSFields(AllocObjectArray<Field>(it.NumStaticFields()));
1357 }
1358 if (it.NumInstanceFields() != 0) {
1359 klass->SetIFields(AllocObjectArray<Field>(it.NumInstanceFields()));
1360 }
1361 for (size_t i = 0; it.HasNextStaticField(); i++, it.Next()) {
1362 SirtRef<Field> sfield(AllocField());
1363 klass->SetStaticField(i, sfield.get());
1364 LoadField(dex_file, it, klass, sfield);
1365 }
1366 for (size_t i = 0; it.HasNextInstanceField(); i++, it.Next()) {
1367 SirtRef<Field> ifield(AllocField());
1368 klass->SetInstanceField(i, ifield.get());
1369 LoadField(dex_file, it, klass, ifield);
Brian Carlstrom934486c2011-07-12 23:42:50 -07001370 }
1371
Brian Carlstromaded5f72011-10-07 17:15:04 -07001372 UniquePtr<const OatFile::OatClass> oat_class;
1373 if (Runtime::Current()->IsStarted() && !ClassLoader::UseCompileTimeClassPath()) {
Brian Carlstromae826982011-11-09 01:33:42 -08001374 const OatFile* oat_file = FindOatFileForDexFile(dex_file);
Brian Carlstromaded5f72011-10-07 17:15:04 -07001375 if (oat_file != NULL) {
1376 const OatFile::OatDexFile* oat_dex_file = oat_file->GetOatDexFile(dex_file.GetLocation());
1377 if (oat_dex_file != NULL) {
1378 uint32_t class_def_index;
1379 bool found = dex_file.FindClassDefIndex(descriptor, class_def_index);
1380 CHECK(found) << descriptor;
1381 oat_class.reset(oat_dex_file->GetOatClass(class_def_index));
Brian Carlstrom92827a52011-10-10 15:50:01 -07001382 CHECK(oat_class.get() != NULL) << descriptor;
Brian Carlstromaded5f72011-10-07 17:15:04 -07001383 }
1384 }
1385 }
Ian Rogers0571d352011-11-03 19:51:38 -07001386 // Load methods.
1387 if (it.NumDirectMethods() != 0) {
Brian Carlstrom934486c2011-07-12 23:42:50 -07001388 // TODO: append direct methods to class object
Ian Rogers0571d352011-11-03 19:51:38 -07001389 klass->SetDirectMethods(AllocObjectArray<Method>(it.NumDirectMethods()));
Brian Carlstrom934486c2011-07-12 23:42:50 -07001390 }
Ian Rogers0571d352011-11-03 19:51:38 -07001391 if (it.NumVirtualMethods() != 0) {
1392 // TODO: append direct methods to class object
1393 klass->SetVirtualMethods(AllocObjectArray<Method>(it.NumVirtualMethods()));
Brian Carlstrom934486c2011-07-12 23:42:50 -07001394 }
Ian Rogers0571d352011-11-03 19:51:38 -07001395 size_t method_index = 0;
1396 for (size_t i = 0; it.HasNextDirectMethod(); i++, it.Next()) {
1397 SirtRef<Method> method(AllocMethod());
1398 klass->SetDirectMethod(i, method.get());
1399 LoadMethod(dex_file, it, klass, method);
1400 if (oat_class.get() != NULL) {
1401 LinkCode(method, oat_class.get(), method_index);
1402 }
1403 method_index++;
1404 }
1405 for (size_t i = 0; it.HasNextVirtualMethod(); i++, it.Next()) {
1406 SirtRef<Method> method(AllocMethod());
1407 klass->SetVirtualMethod(i, method.get());
1408 LoadMethod(dex_file, it, klass, method);
1409 if (oat_class.get() != NULL) {
1410 LinkCode(method, oat_class.get(), method_index);
1411 }
1412 method_index++;
1413 }
1414 DCHECK(!it.HasNext());
Brian Carlstrom934486c2011-07-12 23:42:50 -07001415}
1416
Ian Rogers0571d352011-11-03 19:51:38 -07001417void ClassLinker::LoadField(const DexFile& dex_file, const ClassDataItemIterator& it,
1418 SirtRef<Class>& klass, SirtRef<Field>& dst) {
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08001419 uint32_t field_idx = it.GetMemberIndex();
1420 dst->SetDexFieldIndex(field_idx);
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001421 dst->SetDeclaringClass(klass.get());
Ian Rogers0571d352011-11-03 19:51:38 -07001422 dst->SetAccessFlags(it.GetMemberAccessFlags());
Brian Carlstrom934486c2011-07-12 23:42:50 -07001423}
1424
Ian Rogers0571d352011-11-03 19:51:38 -07001425void ClassLinker::LoadMethod(const DexFile& dex_file, const ClassDataItemIterator& it,
1426 SirtRef<Class>& klass, SirtRef<Method>& dst) {
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08001427 uint32_t method_idx = it.GetMemberIndex();
1428 dst->SetDexMethodIndex(method_idx);
1429 const DexFile::MethodId& method_id = dex_file.GetMethodId(method_idx);
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001430 dst->SetDeclaringClass(klass.get());
Elliott Hughes20cde902011-10-04 17:37:27 -07001431
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08001432
1433 StringPiece method_name(dex_file.GetMethodName(method_id));
1434 if (method_name == "<init>") {
Elliott Hughes80609252011-09-23 17:24:51 -07001435 dst->SetClass(GetClassRoot(kJavaLangReflectConstructor));
1436 }
Elliott Hughes20cde902011-10-04 17:37:27 -07001437
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08001438 if (method_name == "finalize") {
1439 // Create the prototype for a signature of "()V"
1440 const DexFile::StringId* void_string_id = dex_file.FindStringId("V");
1441 if (void_string_id != NULL) {
1442 const DexFile::TypeId* void_type_id =
1443 dex_file.FindTypeId(dex_file.GetIndexForStringId(*void_string_id));
1444 if (void_type_id != NULL) {
1445 std::vector<uint16_t> no_args;
1446 const DexFile::ProtoId* finalizer_proto =
1447 dex_file.FindProtoId(dex_file.GetIndexForTypeId(*void_type_id), no_args);
1448 if (finalizer_proto != NULL) {
1449 // We have the prototype in the dex file
1450 if (klass->GetClassLoader() != NULL) { // All non-boot finalizer methods are flagged
1451 klass->SetFinalizable();
1452 } else {
1453 StringPiece klass_descriptor(dex_file.StringByTypeIdx(klass->GetDexTypeIndex()));
1454 // The Enum class declares a "final" finalize() method to prevent subclasses from
1455 // introducing a finalizer. We don't want to set the finalizable flag for Enum or its
1456 // subclasses, so we exclude it here.
1457 // We also want to avoid setting the flag on Object, where we know that finalize() is
1458 // empty.
1459 if (klass_descriptor != "Ljava/lang/Object;" &&
1460 klass_descriptor != "Ljava/lang/Enum;") {
1461 klass->SetFinalizable();
1462 }
1463 }
1464 }
1465 }
Elliott Hughes20cde902011-10-04 17:37:27 -07001466 }
Carl Shapiro419ec7b2011-08-03 14:48:33 -07001467 }
Ian Rogers0571d352011-11-03 19:51:38 -07001468 dst->SetCodeItemOffset(it.GetMethodCodeItemOffset());
Ian Rogers0571d352011-11-03 19:51:38 -07001469 dst->SetAccessFlags(it.GetMemberAccessFlags());
Brian Carlstrom934486c2011-07-12 23:42:50 -07001470
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07001471 dst->SetDexCacheStrings(klass->GetDexCache()->GetStrings());
1472 dst->SetDexCacheResolvedTypes(klass->GetDexCache()->GetResolvedTypes());
1473 dst->SetDexCacheResolvedMethods(klass->GetDexCache()->GetResolvedMethods());
1474 dst->SetDexCacheResolvedFields(klass->GetDexCache()->GetResolvedFields());
1475 dst->SetDexCacheCodeAndDirectMethods(klass->GetDexCache()->GetCodeAndDirectMethods());
1476 dst->SetDexCacheInitializedStaticStorage(klass->GetDexCache()->GetInitializedStaticStorage());
Brian Carlstrom934486c2011-07-12 23:42:50 -07001477}
1478
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07001479void ClassLinker::AppendToBootClassPath(const DexFile& dex_file) {
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001480 SirtRef<DexCache> dex_cache(AllocDexCache(dex_file));
1481 AppendToBootClassPath(dex_file, dex_cache);
Brian Carlstroma663ea52011-08-19 23:33:41 -07001482}
1483
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001484void ClassLinker::AppendToBootClassPath(const DexFile& dex_file, SirtRef<DexCache>& dex_cache) {
1485 CHECK(dex_cache.get() != NULL) << dex_file.GetLocation();
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07001486 boot_class_path_.push_back(&dex_file);
Brian Carlstroma663ea52011-08-19 23:33:41 -07001487 RegisterDexFile(dex_file, dex_cache);
Brian Carlstrom578bbdc2011-07-21 14:07:47 -07001488}
1489
Brian Carlstromaded5f72011-10-07 17:15:04 -07001490bool ClassLinker::IsDexFileRegisteredLocked(const DexFile& dex_file) const {
Brian Carlstrom47d237a2011-10-18 15:08:33 -07001491 dex_lock_.AssertHeld();
Brian Carlstromaded5f72011-10-07 17:15:04 -07001492 for (size_t i = 0; i != dex_files_.size(); ++i) {
1493 if (dex_files_[i] == &dex_file) {
1494 return true;
1495 }
1496 }
1497 return false;
Brian Carlstroma663ea52011-08-19 23:33:41 -07001498}
1499
Brian Carlstromaded5f72011-10-07 17:15:04 -07001500bool ClassLinker::IsDexFileRegistered(const DexFile& dex_file) const {
Brian Carlstrom47d237a2011-10-18 15:08:33 -07001501 MutexLock mu(dex_lock_);
Brian Carlstrom06918512011-10-16 23:39:12 -07001502 return IsDexFileRegisteredLocked(dex_file);
Brian Carlstromaded5f72011-10-07 17:15:04 -07001503}
1504
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001505void ClassLinker::RegisterDexFileLocked(const DexFile& dex_file, SirtRef<DexCache>& dex_cache) {
Brian Carlstrom47d237a2011-10-18 15:08:33 -07001506 dex_lock_.AssertHeld();
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001507 CHECK(dex_cache.get() != NULL) << dex_file.GetLocation();
Brian Carlstrom69b15fb2011-09-03 12:25:21 -07001508 CHECK(dex_cache->GetLocation()->Equals(dex_file.GetLocation()));
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07001509 dex_files_.push_back(&dex_file);
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001510 dex_caches_.push_back(dex_cache.get());
Brian Carlstrom578bbdc2011-07-21 14:07:47 -07001511}
1512
Brian Carlstromaded5f72011-10-07 17:15:04 -07001513void ClassLinker::RegisterDexFile(const DexFile& dex_file) {
Brian Carlstrom47d237a2011-10-18 15:08:33 -07001514 {
1515 MutexLock mu(dex_lock_);
1516 if (IsDexFileRegisteredLocked(dex_file)) {
1517 return;
1518 }
Brian Carlstromaded5f72011-10-07 17:15:04 -07001519 }
Brian Carlstrom47d237a2011-10-18 15:08:33 -07001520 // Don't alloc while holding the lock, since allocation may need to
1521 // suspend all threads and another thread may need the dex_lock_ to
1522 // get to a suspend point.
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001523 SirtRef<DexCache> dex_cache(AllocDexCache(dex_file));
Brian Carlstrom47d237a2011-10-18 15:08:33 -07001524 {
1525 MutexLock mu(dex_lock_);
1526 if (IsDexFileRegisteredLocked(dex_file)) {
1527 return;
1528 }
1529 RegisterDexFileLocked(dex_file, dex_cache);
1530 }
Brian Carlstromaded5f72011-10-07 17:15:04 -07001531}
1532
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001533void ClassLinker::RegisterDexFile(const DexFile& dex_file, SirtRef<DexCache>& dex_cache) {
Brian Carlstrom47d237a2011-10-18 15:08:33 -07001534 MutexLock mu(dex_lock_);
Brian Carlstromaded5f72011-10-07 17:15:04 -07001535 RegisterDexFileLocked(dex_file, dex_cache);
1536}
1537
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001538const DexFile& ClassLinker::FindDexFile(const DexCache* dex_cache) const {
Ian Rogers466bb252011-10-14 03:29:56 -07001539 CHECK(dex_cache != NULL);
Brian Carlstrom47d237a2011-10-18 15:08:33 -07001540 MutexLock mu(dex_lock_);
Brian Carlstrom7e49dca2011-07-22 18:07:34 -07001541 for (size_t i = 0; i != dex_caches_.size(); ++i) {
1542 if (dex_caches_[i] == dex_cache) {
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001543 return *dex_files_[i];
Brian Carlstrom578bbdc2011-07-21 14:07:47 -07001544 }
1545 }
Brian Carlstrom69b15fb2011-09-03 12:25:21 -07001546 CHECK(false) << "Failed to find DexFile for DexCache " << dex_cache->GetLocation()->ToModifiedUtf8();
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001547 return *dex_files_[-1];
Brian Carlstrom578bbdc2011-07-21 14:07:47 -07001548}
1549
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07001550DexCache* ClassLinker::FindDexCache(const DexFile& dex_file) const {
Brian Carlstrom47d237a2011-10-18 15:08:33 -07001551 MutexLock mu(dex_lock_);
Brian Carlstromf615a612011-07-23 12:50:34 -07001552 for (size_t i = 0; i != dex_files_.size(); ++i) {
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07001553 if (dex_files_[i] == &dex_file) {
Brian Carlstrom7e49dca2011-07-22 18:07:34 -07001554 return dex_caches_[i];
Brian Carlstrom578bbdc2011-07-21 14:07:47 -07001555 }
1556 }
Brian Carlstrom69b15fb2011-09-03 12:25:21 -07001557 CHECK(false) << "Failed to find DexCache for DexFile " << dex_file.GetLocation();
Brian Carlstrom578bbdc2011-07-21 14:07:47 -07001558 return NULL;
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07001559}
1560
Brian Carlstrom5b8e4c82011-09-18 01:38:59 -07001561Class* ClassLinker::InitializePrimitiveClass(Class* primitive_class,
1562 const char* descriptor,
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07001563 Primitive::Type type) {
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07001564 // TODO: deduce one argument from the other
Brian Carlstrom5b8e4c82011-09-18 01:38:59 -07001565 CHECK(primitive_class != NULL);
1566 primitive_class->SetAccessFlags(kAccPublic | kAccFinal | kAccAbstract);
Brian Carlstrom5b8e4c82011-09-18 01:38:59 -07001567 primitive_class->SetPrimitiveType(type);
1568 primitive_class->SetStatus(Class::kStatusInitialized);
Brian Carlstrom07bb8552012-01-18 22:10:50 -08001569 Class* existing = InsertClass(descriptor, primitive_class, false);
1570 CHECK(existing == NULL) << "InitPrimitiveClass(" << descriptor << ") failed";
Brian Carlstrom5b8e4c82011-09-18 01:38:59 -07001571 return primitive_class;
Carl Shapiro565f5072011-07-10 13:39:43 -07001572}
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07001573
Brian Carlstrombe977852011-07-19 14:54:54 -07001574// Create an array class (i.e. the class object for the array, not the
1575// array itself). "descriptor" looks like "[C" or "[[[[B" or
1576// "[Ljava/lang/String;".
1577//
1578// If "descriptor" refers to an array of primitives, look up the
1579// primitive type's internally-generated class object.
1580//
Brian Carlstrom5b8e4c82011-09-18 01:38:59 -07001581// "class_loader" is the class loader of the class that's referring to
1582// us. It's used to ensure that we're looking for the element type in
1583// the right context. It does NOT become the class loader for the
1584// array class; that always comes from the base element class.
Brian Carlstrombe977852011-07-19 14:54:54 -07001585//
1586// Returns NULL with an exception raised on failure.
Elliott Hughesc3b77c72011-12-15 20:56:48 -08001587Class* ClassLinker::CreateArrayClass(const std::string& descriptor, const ClassLoader* class_loader) {
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07001588 CHECK_EQ('[', descriptor[0]);
Brian Carlstroma331b3c2011-07-18 17:47:56 -07001589
Brian Carlstrom5b8e4c82011-09-18 01:38:59 -07001590 // Identify the underlying component type
Elliott Hughesc3b77c72011-12-15 20:56:48 -08001591 Class* component_type = FindClass(descriptor.substr(1).c_str(), class_loader);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07001592 if (component_type == NULL) {
Brian Carlstrom5b8e4c82011-09-18 01:38:59 -07001593 DCHECK(Thread::Current()->IsExceptionPending());
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001594 return NULL;
1595 }
Brian Carlstroma331b3c2011-07-18 17:47:56 -07001596
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001597 // See if the component type is already loaded. Array classes are
1598 // always associated with the class loader of their underlying
1599 // element type -- an array of Strings goes with the loader for
1600 // java/lang/String -- so we need to look for it there. (The
1601 // caller should have checked for the existence of the class
1602 // before calling here, but they did so with *their* class loader,
1603 // not the component type's loader.)
1604 //
1605 // If we find it, the caller adds "loader" to the class' initiating
1606 // loader list, which should prevent us from going through this again.
1607 //
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07001608 // This call is unnecessary if "loader" and "component_type->GetClassLoader()"
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001609 // are the same, because our caller (FindClass) just did the
1610 // lookup. (Even if we get this wrong we still have correct behavior,
1611 // because we effectively do this lookup again when we add the new
1612 // class to the hash table --- necessary because of possible races with
1613 // other threads.)
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07001614 if (class_loader != component_type->GetClassLoader()) {
Elliott Hughesc3b77c72011-12-15 20:56:48 -08001615 Class* new_class = LookupClass(descriptor.c_str(), component_type->GetClassLoader());
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001616 if (new_class != NULL) {
Brian Carlstroma331b3c2011-07-18 17:47:56 -07001617 return new_class;
1618 }
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001619 }
Brian Carlstroma331b3c2011-07-18 17:47:56 -07001620
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001621 // Fill out the fields in the Class.
1622 //
1623 // It is possible to execute some methods against arrays, because
1624 // all arrays are subclasses of java_lang_Object_, so we need to set
1625 // up a vtable. We can just point at the one in java_lang_Object_.
1626 //
1627 // Array classes are simple enough that we don't need to do a full
1628 // link step.
1629
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001630 SirtRef<Class> new_class(NULL);
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001631 if (!init_done_) {
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07001632 // Classes that were hand created, ie not by FindSystemClass
Elliott Hughes418d20f2011-09-22 14:00:39 -07001633 if (descriptor == "[Ljava/lang/Class;") {
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001634 new_class.reset(GetClassRoot(kClassArrayClass));
Elliott Hughes418d20f2011-09-22 14:00:39 -07001635 } else if (descriptor == "[Ljava/lang/Object;") {
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001636 new_class.reset(GetClassRoot(kObjectArrayClass));
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001637 } else if (descriptor == "[C") {
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001638 new_class.reset(GetClassRoot(kCharArrayClass));
Elliott Hughesc1674ed2011-08-25 18:09:09 -07001639 } else if (descriptor == "[I") {
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001640 new_class.reset(GetClassRoot(kIntArrayClass));
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001641 }
1642 }
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001643 if (new_class.get() == NULL) {
1644 new_class.reset(AllocClass(sizeof(Class)));
1645 if (new_class.get() == NULL) {
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001646 return NULL;
1647 }
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07001648 new_class->SetComponentType(component_type);
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001649 }
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07001650 DCHECK(new_class->GetComponentType() != NULL);
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001651 Class* java_lang_Object = GetClassRoot(kJavaLangObject);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07001652 new_class->SetSuperClass(java_lang_Object);
1653 new_class->SetVTable(java_lang_Object->GetVTable());
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07001654 new_class->SetPrimitiveType(Primitive::kPrimNot);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07001655 new_class->SetClassLoader(component_type->GetClassLoader());
1656 new_class->SetStatus(Class::kStatusInitialized);
1657 // don't need to set new_class->SetObjectSize(..)
Brian Carlstrom9cff8e12011-08-18 16:47:29 -07001658 // because Object::SizeOf delegates to Array::SizeOf
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001659
1660
1661 // All arrays have java/lang/Cloneable and java/io/Serializable as
1662 // interfaces. We need to set that up here, so that stuff like
1663 // "instanceof" works right.
1664 //
1665 // Note: The GC could run during the call to FindSystemClass,
1666 // so we need to make sure the class object is GC-valid while we're in
1667 // there. Do this by clearing the interface list so the GC will just
1668 // think that the entries are null.
1669
1670
1671 // Use the single, global copies of "interfaces" and "iftable"
1672 // (remember not to free them for arrays).
Elliott Hughes92f14b22011-10-06 12:29:54 -07001673 CHECK(array_iftable_ != NULL);
Brian Carlstrom4b620ff2011-09-11 01:11:01 -07001674 new_class->SetIfTable(array_iftable_);
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001675
1676 // Inherit access flags from the component type. Arrays can't be
1677 // used as a superclass or interface, so we want to add "final"
1678 // and remove "interface".
1679 //
1680 // Don't inherit any non-standard flags (e.g., kAccFinal)
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07001681 // from component_type. We assume that the array class does not
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001682 // override finalize().
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07001683 new_class->SetAccessFlags(((new_class->GetComponentType()->GetAccessFlags() &
1684 ~kAccInterface) | kAccFinal) & kAccJavaFlagsMask);
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001685
Brian Carlstrom07bb8552012-01-18 22:10:50 -08001686 Class* existing = InsertClass(descriptor, new_class.get(), false);
1687 if (existing == NULL) {
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001688 return new_class.get();
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001689 }
1690 // Another thread must have loaded the class after we
1691 // started but before we finished. Abandon what we've
1692 // done.
1693 //
1694 // (Yes, this happens.)
1695
Brian Carlstrom07bb8552012-01-18 22:10:50 -08001696 return existing;
Brian Carlstroma331b3c2011-07-18 17:47:56 -07001697}
1698
1699Class* ClassLinker::FindPrimitiveClass(char type) {
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07001700 switch (Primitive::GetType(type)) {
1701 case Primitive::kPrimByte:
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001702 return GetClassRoot(kPrimitiveByte);
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07001703 case Primitive::kPrimChar:
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001704 return GetClassRoot(kPrimitiveChar);
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07001705 case Primitive::kPrimDouble:
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001706 return GetClassRoot(kPrimitiveDouble);
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07001707 case Primitive::kPrimFloat:
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001708 return GetClassRoot(kPrimitiveFloat);
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07001709 case Primitive::kPrimInt:
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001710 return GetClassRoot(kPrimitiveInt);
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07001711 case Primitive::kPrimLong:
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001712 return GetClassRoot(kPrimitiveLong);
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07001713 case Primitive::kPrimShort:
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001714 return GetClassRoot(kPrimitiveShort);
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07001715 case Primitive::kPrimBoolean:
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001716 return GetClassRoot(kPrimitiveBoolean);
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07001717 case Primitive::kPrimVoid:
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001718 return GetClassRoot(kPrimitiveVoid);
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07001719 case Primitive::kPrimNot:
1720 break;
Carl Shapiro744ad052011-08-06 15:53:36 -07001721 }
Elliott Hughesbd935992011-08-22 11:59:34 -07001722 std::string printable_type(PrintableChar(type));
Elliott Hughes4a2b4172011-09-20 17:08:25 -07001723 ThrowNoClassDefFoundError("Not a primitive type: %s", printable_type.c_str());
Elliott Hughesbd935992011-08-22 11:59:34 -07001724 return NULL;
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07001725}
1726
Brian Carlstrom07bb8552012-01-18 22:10:50 -08001727Class* ClassLinker::InsertClass(const StringPiece& descriptor, Class* klass, bool image_class) {
Elliott Hughes4dd9b4d2011-12-12 18:29:24 -08001728 if (VLOG_IS_ON(class_linker)) {
Brian Carlstromae826982011-11-09 01:33:42 -08001729 DexCache* dex_cache = klass->GetDexCache();
1730 std::string source;
1731 if (dex_cache != NULL) {
1732 source += " from ";
1733 source += dex_cache->GetLocation()->ToModifiedUtf8();
1734 }
1735 LOG(INFO) << "Loaded class " << descriptor << source;
1736 }
Brian Carlstrom9cff8e12011-08-18 16:47:29 -07001737 size_t hash = StringPieceHash()(descriptor);
Brian Carlstrom47d237a2011-10-18 15:08:33 -07001738 MutexLock mu(classes_lock_);
Brian Carlstrom07bb8552012-01-18 22:10:50 -08001739 Table& classes = image_class ? image_classes_ : classes_;
1740 Class* existing = LookupClass(descriptor.data(), klass->GetClassLoader(), hash, classes);
1741#ifndef NDEBUG
1742 // Check we don't have the class in the other table in error
1743 Table& other_classes = image_class ? classes_ : image_classes_;
1744 CHECK(LookupClass(descriptor.data(), klass->GetClassLoader(), hash, other_classes) == NULL);
1745#endif
1746 if (existing != NULL) {
1747 return existing;
Ian Rogers5d76c432011-10-31 21:42:49 -07001748 }
Brian Carlstrom07bb8552012-01-18 22:10:50 -08001749 classes.insert(std::make_pair(hash, klass));
1750 return NULL;
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07001751}
1752
Elliott Hughesc3b77c72011-12-15 20:56:48 -08001753bool ClassLinker::RemoveClass(const char* descriptor, const ClassLoader* class_loader) {
1754 size_t hash = Hash(descriptor);
Brian Carlstromae826982011-11-09 01:33:42 -08001755 MutexLock mu(classes_lock_);
Elliott Hughese5448b52012-01-18 16:44:06 -08001756 typedef Table::iterator It; // TODO: C++0x auto
Brian Carlstromae826982011-11-09 01:33:42 -08001757 // TODO: determine if its better to search classes_ or image_classes_ first
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08001758 ClassHelper kh;
Brian Carlstrom07bb8552012-01-18 22:10:50 -08001759 for (It it = classes_.lower_bound(hash), end = classes_.end(); it != end && it->first == hash; ++it) {
Brian Carlstromae826982011-11-09 01:33:42 -08001760 Class* klass = it->second;
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08001761 kh.ChangeClass(klass);
Elliott Hughesc3b77c72011-12-15 20:56:48 -08001762 if (strcmp(kh.GetDescriptor(), descriptor) == 0 && klass->GetClassLoader() == class_loader) {
Brian Carlstromae826982011-11-09 01:33:42 -08001763 classes_.erase(it);
1764 return true;
1765 }
1766 }
Brian Carlstrom07bb8552012-01-18 22:10:50 -08001767 for (It it = image_classes_.lower_bound(hash), end = classes_.end(); it != end && it->first == hash; ++it) {
Brian Carlstromae826982011-11-09 01:33:42 -08001768 Class* klass = it->second;
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08001769 kh.ChangeClass(klass);
Elliott Hughesc3b77c72011-12-15 20:56:48 -08001770 if (strcmp(kh.GetDescriptor(), descriptor) == 0 && klass->GetClassLoader() == class_loader) {
Brian Carlstromae826982011-11-09 01:33:42 -08001771 image_classes_.erase(it);
1772 return true;
1773 }
1774 }
1775 return false;
1776}
1777
Elliott Hughesc3b77c72011-12-15 20:56:48 -08001778Class* ClassLinker::LookupClass(const char* descriptor, const ClassLoader* class_loader) {
1779 size_t hash = Hash(descriptor);
Brian Carlstrom47d237a2011-10-18 15:08:33 -07001780 MutexLock mu(classes_lock_);
Ian Rogers5d76c432011-10-31 21:42:49 -07001781 // TODO: determine if its better to search classes_ or image_classes_ first
Brian Carlstrom07bb8552012-01-18 22:10:50 -08001782 Class* klass = LookupClass(descriptor, class_loader, hash, classes_);
1783 if (klass != NULL) {
1784 return klass;
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07001785 }
Brian Carlstrom07bb8552012-01-18 22:10:50 -08001786 return LookupClass(descriptor, class_loader, hash, image_classes_);
1787}
1788
1789Class* ClassLinker::LookupClass(const char* descriptor, const ClassLoader* class_loader,
1790 size_t hash, const Table& classes) {
1791 ClassHelper kh(NULL, this);
1792 typedef Table::const_iterator It; // TODO: C++0x auto
1793 for (It it = classes.lower_bound(hash), end = classes_.end(); it != end && it->first == hash; ++it) {
Ian Rogers5d76c432011-10-31 21:42:49 -07001794 Class* klass = it->second;
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08001795 kh.ChangeClass(klass);
Elliott Hughesc3b77c72011-12-15 20:56:48 -08001796 if (strcmp(descriptor, kh.GetDescriptor()) == 0 && klass->GetClassLoader() == class_loader) {
Brian Carlstrom07bb8552012-01-18 22:10:50 -08001797#ifndef NDEBUG
1798 for (++it; it != end && it->first == hash; ++it) {
1799 kh.ChangeClass(it->second);
1800 CHECK(!(strcmp(descriptor, kh.GetDescriptor()) == 0 && klass->GetClassLoader() == class_loader))
1801 << PrettyClass(klass) << " " << klass << " " << klass->GetClassLoader() << " "
1802 << PrettyClass(it->second) << " " << it->second << " " << it->second->GetClassLoader();
1803 }
1804#endif
Ian Rogers5d76c432011-10-31 21:42:49 -07001805 return klass;
1806 }
1807 }
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07001808 return NULL;
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07001809}
1810
Elliott Hughesc3b77c72011-12-15 20:56:48 -08001811void ClassLinker::LookupClasses(const char* descriptor, std::vector<Class*>& classes) {
Elliott Hughes6fa602d2011-12-02 17:54:25 -08001812 classes.clear();
Elliott Hughesc3b77c72011-12-15 20:56:48 -08001813 size_t hash = Hash(descriptor);
Elliott Hughes6fa602d2011-12-02 17:54:25 -08001814 MutexLock mu(classes_lock_);
1815 typedef Table::const_iterator It; // TODO: C++0x auto
1816 // TODO: determine if its better to search classes_ or image_classes_ first
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08001817 ClassHelper kh(NULL, this);
Brian Carlstrom07bb8552012-01-18 22:10:50 -08001818 for (It it = classes_.lower_bound(hash), end = classes_.end(); it != end && it->first == hash; ++it) {
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08001819 Class* klass = it->second;
1820 kh.ChangeClass(klass);
Elliott Hughesc3b77c72011-12-15 20:56:48 -08001821 if (strcmp(descriptor, kh.GetDescriptor()) == 0) {
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08001822 classes.push_back(klass);
Elliott Hughes6fa602d2011-12-02 17:54:25 -08001823 }
1824 }
Brian Carlstrom07bb8552012-01-18 22:10:50 -08001825 for (It it = image_classes_.lower_bound(hash), end = classes_.end(); it != end && it->first == hash; ++it) {
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08001826 Class* klass = it->second;
1827 kh.ChangeClass(klass);
Elliott Hughesc3b77c72011-12-15 20:56:48 -08001828 if (strcmp(descriptor, kh.GetDescriptor()) == 0) {
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08001829 classes.push_back(klass);
Elliott Hughes6fa602d2011-12-02 17:54:25 -08001830 }
1831 }
1832}
1833
Ian Rogersc20a83e2012-01-18 18:15:32 -08001834#ifndef NDEBUG
1835static void CheckMethodsHaveGcMaps(Class* klass) {
1836 if (!Runtime::Current()->IsStarted()) {
1837 return;
1838 }
1839 for (size_t i = 0; i < klass->NumDirectMethods(); i++) {
1840 Method* method = klass->GetDirectMethod(i);
1841 if (!method->IsNative() && !method->IsAbstract()) {
1842 CHECK(method->GetGcMap() != NULL) << PrettyMethod(method);
1843 }
1844 }
1845 for (size_t i = 0; i < klass->NumVirtualMethods(); i++) {
1846 Method* method = klass->GetVirtualMethod(i);
1847 if (!method->IsNative() && !method->IsAbstract()) {
1848 CHECK(method->GetGcMap() != NULL) << PrettyMethod(method);
1849 }
1850 }
1851}
1852#else
1853static void CheckMethodsHaveGcMaps(Class* klass) {
1854}
1855#endif
1856
jeffhao98eacac2011-09-14 16:11:53 -07001857void ClassLinker::VerifyClass(Class* klass) {
Brian Carlstrome7d856b2012-01-11 18:10:55 -08001858 // TODO: assert that the monitor on the Class is held
jeffhao98eacac2011-09-14 16:11:53 -07001859 if (klass->IsVerified()) {
1860 return;
1861 }
1862
Brian Carlstrome7d856b2012-01-11 18:10:55 -08001863 CHECK_EQ(klass->GetStatus(), Class::kStatusResolved) << PrettyClass(klass);
jeffhao98eacac2011-09-14 16:11:53 -07001864 klass->SetStatus(Class::kStatusVerifying);
jeffhao98eacac2011-09-14 16:11:53 -07001865
Brian Carlstrome7d856b2012-01-11 18:10:55 -08001866 // Try to use verification information from oat file, otherwise do runtime verification
1867 const DexFile& dex_file = FindDexFile(klass->GetDexCache());
1868 if (VerifyClassUsingOatFile(dex_file, klass) || verifier::DexVerifier::VerifyClass(klass)) {
1869 // Make sure all classes referenced by catch blocks are resolved
1870 ResolveClassExceptionHandlerTypes(dex_file, klass);
jeffhao5cfd6fb2011-09-27 13:54:29 -07001871 klass->SetStatus(Class::kStatusVerified);
Ian Rogersc20a83e2012-01-18 18:15:32 -08001872 // Sanity check that a verified class has GC maps on all methods
1873 CheckMethodsHaveGcMaps(klass);
jeffhao5cfd6fb2011-09-27 13:54:29 -07001874 } else {
1875 LOG(ERROR) << "Verification failed on class " << PrettyClass(klass);
Elliott Hughesd9cdfe92011-10-06 16:09:04 -07001876 Thread* self = Thread::Current();
Brian Carlstrome7d856b2012-01-11 18:10:55 -08001877 CHECK(!self->IsExceptionPending()) << PrettyTypeOf(self->GetException()) << PrettyClass(klass);
Elliott Hughesd9cdfe92011-10-06 16:09:04 -07001878 self->ThrowNewExceptionF("Ljava/lang/VerifyError;", "Verification of %s failed",
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08001879 PrettyDescriptor(klass).c_str());
Brian Carlstrome7d856b2012-01-11 18:10:55 -08001880 CHECK_EQ(klass->GetStatus(), Class::kStatusVerifying) << PrettyClass(klass);
Elliott Hughesd9cdfe92011-10-06 16:09:04 -07001881 klass->SetStatus(Class::kStatusError);
jeffhao5cfd6fb2011-09-27 13:54:29 -07001882 }
jeffhao98eacac2011-09-14 16:11:53 -07001883}
1884
Brian Carlstrome7d856b2012-01-11 18:10:55 -08001885bool ClassLinker::VerifyClassUsingOatFile(const DexFile& dex_file, Class* klass) {
1886 if (!Runtime::Current()->IsStarted()) {
1887 return false;
1888 }
1889 if (ClassLoader::UseCompileTimeClassPath()) {
1890 return false;
1891 }
1892 const OatFile* oat_file = FindOatFileForDexFile(dex_file);
1893 if (oat_file == NULL) {
1894 return false;
1895 }
1896 const OatFile::OatDexFile* oat_dex_file = oat_file->GetOatDexFile(dex_file.GetLocation());
1897 CHECK(oat_dex_file != NULL) << PrettyClass(klass);
1898 const char* descriptor = ClassHelper(klass).GetDescriptor();
1899 uint32_t class_def_index;
1900 bool found = dex_file.FindClassDefIndex(descriptor, class_def_index);
1901 CHECK(found) << descriptor;
1902 UniquePtr<const OatFile::OatClass> oat_class(oat_dex_file->GetOatClass(class_def_index));
1903 CHECK(oat_class.get() != NULL) << descriptor;
1904 Class::Status status = oat_class->GetStatus();
1905 if (status == Class::kStatusError) {
1906 ThrowEarlierClassFailure(klass);
1907 klass->SetVerifyErrorClass(Thread::Current()->GetException()->GetClass());
1908 klass->SetStatus(Class::kStatusError);
1909 return true;
1910 }
1911 if (status == Class::kStatusVerified || status == Class::kStatusInitialized) {
1912 return true;
1913 }
1914 if (status == Class::kStatusNotReady) {
1915 return false;
1916 }
1917 LOG(FATAL) << "Unexpected class status: " << status;
1918 return false;
1919}
1920
1921void ClassLinker::ResolveClassExceptionHandlerTypes(const DexFile& dex_file, Class* klass) {
1922 for (size_t i = 0; i < klass->NumDirectMethods(); i++) {
1923 ResolveMethodExceptionHandlerTypes(dex_file, klass->GetDirectMethod(i));
1924 }
1925 for (size_t i = 0; i < klass->NumVirtualMethods(); i++) {
1926 ResolveMethodExceptionHandlerTypes(dex_file, klass->GetVirtualMethod(i));
1927 }
1928}
1929
1930void ClassLinker::ResolveMethodExceptionHandlerTypes(const DexFile& dex_file, Method* method) {
1931 // similar to DexVerifier::ScanTryCatchBlocks and dex2oat's ResolveExceptionsForMethod.
1932 const DexFile::CodeItem* code_item = dex_file.GetCodeItem(method->GetCodeItemOffset());
1933 if (code_item == NULL) {
1934 return; // native or abstract method
1935 }
1936 if (code_item->tries_size_ == 0) {
1937 return; // nothing to process
1938 }
1939 const byte* handlers_ptr = DexFile::GetCatchHandlerData(*code_item, 0);
1940 uint32_t handlers_size = DecodeUnsignedLeb128(&handlers_ptr);
1941 ClassLinker* linker = Runtime::Current()->GetClassLinker();
1942 for (uint32_t idx = 0; idx < handlers_size; idx++) {
1943 CatchHandlerIterator iterator(handlers_ptr);
1944 for (; iterator.HasNext(); iterator.Next()) {
1945 // Ensure exception types are resolved so that they don't need resolution to be delivered,
1946 // unresolved exception types will be ignored by exception delivery
1947 if (iterator.GetHandlerTypeIndex() != DexFile::kDexNoIndex16) {
1948 Class* exception_type = linker->ResolveType(iterator.GetHandlerTypeIndex(), method);
1949 if (exception_type == NULL) {
1950 DCHECK(Thread::Current()->IsExceptionPending());
1951 Thread::Current()->ClearException();
1952 }
1953 }
1954 }
1955 handlers_ptr = iterator.EndDataPointer();
1956 }
1957}
1958
Ian Rogersc2b44472011-12-14 21:17:17 -08001959static void CheckProxyConstructor(Method* constructor);
1960static void CheckProxyMethod(Method* method, SirtRef<Method>& prototype);
1961
Jesse Wilson95caa792011-10-12 18:14:17 -04001962Class* ClassLinker::CreateProxyClass(String* name, ObjectArray<Class>* interfaces,
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08001963 ClassLoader* loader, ObjectArray<Method>* methods,
1964 ObjectArray<ObjectArray<Class> >* throws) {
Ian Rogersc2b44472011-12-14 21:17:17 -08001965 SirtRef<Class> klass(AllocClass(GetClassRoot(kJavaLangClass), sizeof(SynthesizedProxyClass)));
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001966 CHECK(klass.get() != NULL);
Ian Rogersc2b44472011-12-14 21:17:17 -08001967 DCHECK(klass->GetClass() != NULL);
Jesse Wilson95caa792011-10-12 18:14:17 -04001968 klass->SetObjectSize(sizeof(Proxy));
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08001969 klass->SetAccessFlags(kAccClassIsProxy | kAccPublic | kAccFinal);
Jesse Wilson95caa792011-10-12 18:14:17 -04001970 klass->SetClassLoader(loader);
Ian Rogersc2b44472011-12-14 21:17:17 -08001971 DCHECK_EQ(klass->GetPrimitiveType(), Primitive::kPrimNot);
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08001972 klass->SetName(name);
Ian Rogers466bb252011-10-14 03:29:56 -07001973 Class* proxy_class = GetClassRoot(kJavaLangReflectProxy);
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08001974 klass->SetDexCache(proxy_class->GetDexCache());
Ian Rogersc2b44472011-12-14 21:17:17 -08001975
1976 klass->SetStatus(Class::kStatusIdx);
1977
1978 klass->SetDexTypeIndex(DexFile::kDexNoIndex16);
1979
1980 // Create static field that holds throws, instance fields are inherited
1981 klass->SetSFields(AllocObjectArray<Field>(1));
1982 SirtRef<Field> sfield(AllocField());
1983 klass->SetStaticField(0, sfield.get());
1984 sfield->SetDexFieldIndex(-1);
1985 sfield->SetDeclaringClass(klass.get());
1986 sfield->SetAccessFlags(kAccStatic | kAccPublic | kAccFinal);
Jesse Wilson95caa792011-10-12 18:14:17 -04001987
Ian Rogers466bb252011-10-14 03:29:56 -07001988 // Proxies have 1 direct method, the constructor
Jesse Wilson95caa792011-10-12 18:14:17 -04001989 klass->SetDirectMethods(AllocObjectArray<Method>(1));
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08001990 klass->SetDirectMethod(0, CreateProxyConstructor(klass, proxy_class));
Jesse Wilson95caa792011-10-12 18:14:17 -04001991
Ian Rogers466bb252011-10-14 03:29:56 -07001992 // Create virtual method using specified prototypes
Jesse Wilson95caa792011-10-12 18:14:17 -04001993 size_t num_virtual_methods = methods->GetLength();
1994 klass->SetVirtualMethods(AllocObjectArray<Method>(num_virtual_methods));
1995 for (size_t i = 0; i < num_virtual_methods; ++i) {
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001996 SirtRef<Method> prototype(methods->Get(i));
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08001997 klass->SetVirtualMethod(i, CreateProxyMethod(klass, prototype));
Jesse Wilson95caa792011-10-12 18:14:17 -04001998 }
Ian Rogersc2b44472011-12-14 21:17:17 -08001999
2000 klass->SetSuperClass(proxy_class); // The super class is java.lang.reflect.Proxy
2001 klass->SetStatus(Class::kStatusLoaded); // Class is now effectively in the loaded state
2002 DCHECK(!Thread::Current()->IsExceptionPending());
2003
2004 // Link the fields and virtual methods, creating vtable and iftables
2005 if (!LinkClass(klass, interfaces)) {
Jesse Wilson95caa792011-10-12 18:14:17 -04002006 DCHECK(Thread::Current()->IsExceptionPending());
2007 return NULL;
2008 }
Ian Rogersc2b44472011-12-14 21:17:17 -08002009 sfield->SetObject(NULL, throws); // initialize throws field
2010 klass->SetStatus(Class::kStatusInitialized);
2011
2012 // sanity checks
2013#ifndef NDEBUG
2014 bool debug = true;
2015#else
2016 bool debug = false;
2017#endif
2018 if (debug) {
2019 CHECK(klass->GetIFields() == NULL);
2020 CheckProxyConstructor(klass->GetDirectMethod(0));
2021 for (size_t i = 0; i < num_virtual_methods; ++i) {
2022 SirtRef<Method> prototype(methods->Get(i));
2023 CheckProxyMethod(klass->GetVirtualMethod(i), prototype);
2024 }
Brian Carlstrom89521892011-12-07 22:05:07 -08002025 std::string throws_field_name("java.lang.Class[][] ");
Ian Rogersc2b44472011-12-14 21:17:17 -08002026 throws_field_name += name->ToModifiedUtf8();
2027 throws_field_name += ".throws";
2028 CHECK(PrettyField(klass->GetStaticField(0)) == throws_field_name);
2029
2030 SynthesizedProxyClass* synth_proxy_class = down_cast<SynthesizedProxyClass*>(klass.get());
2031 CHECK_EQ(synth_proxy_class->GetThrows(), throws);
2032 }
Brian Carlstrom40381fb2011-10-19 14:13:40 -07002033 return klass.get();
Jesse Wilson95caa792011-10-12 18:14:17 -04002034}
2035
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002036std::string ClassLinker::GetDescriptorForProxy(const Class* proxy_class) {
2037 DCHECK(proxy_class->IsProxyClass());
2038 String* name = proxy_class->GetName();
2039 DCHECK(name != NULL);
2040 return DotToDescriptor(name->ToModifiedUtf8().c_str());
2041}
2042
2043
2044Method* ClassLinker::CreateProxyConstructor(SirtRef<Class>& klass, Class* proxy_class) {
Ian Rogers466bb252011-10-14 03:29:56 -07002045 // Create constructor for Proxy that must initialize h
Ian Rogers466bb252011-10-14 03:29:56 -07002046 ObjectArray<Method>* proxy_direct_methods = proxy_class->GetDirectMethods();
Jesse Wilsonecbce8f2011-10-21 19:57:36 -04002047 CHECK_EQ(proxy_direct_methods->GetLength(), 15);
Ian Rogers466bb252011-10-14 03:29:56 -07002048 Method* proxy_constructor = proxy_direct_methods->Get(2);
2049 // Clone the existing constructor of Proxy (our constructor would just invoke it so steal its
2050 // code_ too)
2051 Method* constructor = down_cast<Method*>(proxy_constructor->Clone());
2052 // Make this constructor public and fix the class to be our Proxy version
2053 constructor->SetAccessFlags((constructor->GetAccessFlags() & ~kAccProtected) | kAccPublic);
Brian Carlstrom40381fb2011-10-19 14:13:40 -07002054 constructor->SetDeclaringClass(klass.get());
Ian Rogersc2b44472011-12-14 21:17:17 -08002055 return constructor;
2056}
2057
2058static void CheckProxyConstructor(Method* constructor) {
Ian Rogers466bb252011-10-14 03:29:56 -07002059 CHECK(constructor->IsConstructor());
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002060 MethodHelper mh(constructor);
2061 CHECK_STREQ(mh.GetName(), "<init>");
Elliott Hughesba8eee12012-01-24 20:25:24 -08002062 CHECK_EQ(mh.GetSignature(), std::string("(Ljava/lang/reflect/InvocationHandler;)V"));
Ian Rogers466bb252011-10-14 03:29:56 -07002063 DCHECK(constructor->IsPublic());
Jesse Wilson95caa792011-10-12 18:14:17 -04002064}
2065
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002066Method* ClassLinker::CreateProxyMethod(SirtRef<Class>& klass, SirtRef<Method>& prototype) {
2067 // Ensure prototype is in dex cache so that we can use the dex cache to look up the overridden
2068 // prototype method
2069 prototype->GetDexCacheResolvedMethods()->Set(prototype->GetDexMethodIndex(), prototype.get());
2070 // We steal everything from the prototype (such as DexCache, invoke stub, etc.) then specialize
Ian Rogers466bb252011-10-14 03:29:56 -07002071 // as necessary
2072 Method* method = down_cast<Method*>(prototype->Clone());
2073
2074 // Set class to be the concrete proxy class and clear the abstract flag, modify exceptions to
2075 // the intersection of throw exceptions as defined in Proxy
Brian Carlstrom40381fb2011-10-19 14:13:40 -07002076 method->SetDeclaringClass(klass.get());
Ian Rogers466bb252011-10-14 03:29:56 -07002077 method->SetAccessFlags((method->GetAccessFlags() & ~kAccAbstract) | kAccFinal);
Jesse Wilson95caa792011-10-12 18:14:17 -04002078
Ian Rogers466bb252011-10-14 03:29:56 -07002079 // At runtime the method looks like a reference and argument saving method, clone the code
2080 // related parameters from this method.
2081 Method* refs_and_args = Runtime::Current()->GetCalleeSaveMethod(Runtime::kRefsAndArgs);
2082 method->SetCoreSpillMask(refs_and_args->GetCoreSpillMask());
2083 method->SetFpSpillMask(refs_and_args->GetFpSpillMask());
2084 method->SetFrameSizeInBytes(refs_and_args->GetFrameSizeInBytes());
2085 method->SetCode(reinterpret_cast<void*>(art_proxy_invoke_handler));
Ian Rogersc2b44472011-12-14 21:17:17 -08002086 return method;
2087}
Jesse Wilson95caa792011-10-12 18:14:17 -04002088
Ian Rogersc2b44472011-12-14 21:17:17 -08002089static void CheckProxyMethod(Method* method, SirtRef<Method>& prototype) {
Ian Rogers466bb252011-10-14 03:29:56 -07002090 // Basic sanity
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002091 CHECK(!prototype->IsFinal());
2092 CHECK(method->IsFinal());
2093 CHECK(!method->IsAbstract());
2094 MethodHelper mh(method);
2095 const char* method_name = mh.GetName();
2096 const char* method_shorty = mh.GetShorty();
2097 Class* method_return = mh.GetReturnType();
2098
2099 mh.ChangeMethod(prototype.get());
2100
2101 CHECK_STREQ(mh.GetName(), method_name);
2102 CHECK_STREQ(mh.GetShorty(), method_shorty);
Ian Rogers466bb252011-10-14 03:29:56 -07002103
2104 // More complex sanity - via dex cache
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002105 CHECK_EQ(mh.GetReturnType(), method_return);
Jesse Wilson95caa792011-10-12 18:14:17 -04002106}
2107
Brian Carlstrom25c33252011-09-18 15:58:35 -07002108bool ClassLinker::InitializeClass(Class* klass, bool can_run_clinit) {
Brian Carlstromd1422f82011-09-28 11:37:09 -07002109 CHECK(klass->IsResolved() || klass->IsErroneous())
2110 << PrettyClass(klass) << " is " << klass->GetStatus();
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002111
Carl Shapirob5573532011-07-12 18:22:59 -07002112 Thread* self = Thread::Current();
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002113
Brian Carlstrom25c33252011-09-18 15:58:35 -07002114 Method* clinit = NULL;
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002115 {
Brian Carlstromd1422f82011-09-28 11:37:09 -07002116 // see JLS 3rd edition, 12.4.2 "Detailed Initialization Procedure" for the locking protocol
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002117 ObjectLock lock(klass);
2118
Brian Carlstromd1422f82011-09-28 11:37:09 -07002119 if (klass->GetStatus() == Class::kStatusInitialized) {
2120 return true;
2121 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002122
Brian Carlstromd1422f82011-09-28 11:37:09 -07002123 if (klass->IsErroneous()) {
2124 ThrowEarlierClassFailure(klass);
2125 return false;
2126 }
2127
2128 if (klass->GetStatus() == Class::kStatusResolved) {
jeffhao98eacac2011-09-14 16:11:53 -07002129 VerifyClass(klass);
2130 if (klass->GetStatus() != Class::kStatusVerified) {
Ian Rogers595799e2012-01-11 17:32:51 -08002131 CHECK(self->IsExceptionPending());
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002132 return false;
2133 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002134 }
2135
Brian Carlstrom25c33252011-09-18 15:58:35 -07002136 clinit = klass->FindDeclaredDirectMethod("<clinit>", "()V");
2137 if (clinit != NULL && !can_run_clinit) {
Brian Carlstromd1422f82011-09-28 11:37:09 -07002138 // if the class has a <clinit> but we can't run it during compilation,
Ian Rogers595799e2012-01-11 17:32:51 -08002139 // don't bother going to kStatusInitializing. We return true to maintain
2140 // the invariant that a false result implies there is a pending exception.
2141 return true;
Brian Carlstrom25c33252011-09-18 15:58:35 -07002142 }
2143
Brian Carlstromd1422f82011-09-28 11:37:09 -07002144 // If the class is kStatusInitializing, either this thread is
2145 // initializing higher up the stack or another thread has beat us
2146 // to initializing and we need to wait. Either way, this
2147 // invocation of InitializeClass will not be responsible for
2148 // running <clinit> and will return.
2149 if (klass->GetStatus() == Class::kStatusInitializing) {
Elliott Hughes005ab2e2011-09-11 17:15:31 -07002150 // We caught somebody else in the act; was it us?
Elliott Hughesdcc24742011-09-07 14:02:44 -07002151 if (klass->GetClinitThreadId() == self->GetTid()) {
Brian Carlstromd1422f82011-09-28 11:37:09 -07002152 // Yes. That's fine. Return so we can continue initializing.
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002153 return true;
2154 }
Brian Carlstromd1422f82011-09-28 11:37:09 -07002155 // No. That's fine. Wait for another thread to finish initializing.
2156 return WaitForInitializeClass(klass, self, lock);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002157 }
2158
2159 if (!ValidateSuperClassDescriptors(klass)) {
Ian Rogers595799e2012-01-11 17:32:51 -08002160 CHECK(self->IsExceptionPending());
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002161 klass->SetStatus(Class::kStatusError);
2162 return false;
2163 }
2164
Brian Carlstrome7d856b2012-01-11 18:10:55 -08002165 DCHECK_EQ(klass->GetStatus(), Class::kStatusVerified) << PrettyClass(klass);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002166
Elliott Hughesdcc24742011-09-07 14:02:44 -07002167 klass->SetClinitThreadId(self->GetTid());
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002168 klass->SetStatus(Class::kStatusInitializing);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002169 }
2170
Elliott Hughes83df2ac2011-10-11 16:37:54 -07002171 uint64_t t0 = NanoTime();
2172
Brian Carlstrom25c33252011-09-18 15:58:35 -07002173 if (!InitializeSuperClass(klass, can_run_clinit)) {
Ian Rogers595799e2012-01-11 17:32:51 -08002174 CHECK(self->IsExceptionPending());
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002175 return false;
2176 }
2177
2178 InitializeStaticFields(klass);
2179
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002180 if (clinit != NULL) {
Elliott Hughesf5ecf062011-09-06 17:37:59 -07002181 clinit->Invoke(self, NULL, NULL, NULL);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002182 }
2183
Elliott Hughes83df2ac2011-10-11 16:37:54 -07002184 uint64_t t1 = NanoTime();
2185
Ian Rogersbdfb1a52012-01-12 14:05:22 -08002186 bool success = true;
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002187 {
2188 ObjectLock lock(klass);
2189
2190 if (self->IsExceptionPending()) {
Elliott Hughes4d0207c2011-10-03 19:14:34 -07002191 WrapExceptionInInitializer();
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002192 klass->SetStatus(Class::kStatusError);
Ian Rogersbdfb1a52012-01-12 14:05:22 -08002193 success = false;
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002194 } else {
Elliott Hughes83df2ac2011-10-11 16:37:54 -07002195 RuntimeStats* global_stats = Runtime::Current()->GetStats();
2196 RuntimeStats* thread_stats = self->GetStats();
2197 ++global_stats->class_init_count;
2198 ++thread_stats->class_init_count;
2199 global_stats->class_init_time_ns += (t1 - t0);
2200 thread_stats->class_init_time_ns += (t1 - t0);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002201 klass->SetStatus(Class::kStatusInitialized);
Elliott Hughes4dd9b4d2011-12-12 18:29:24 -08002202 if (VLOG_IS_ON(class_linker)) {
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002203 ClassHelper kh(klass);
2204 LOG(INFO) << "Initialized class " << kh.GetDescriptor() << " from " << kh.GetLocation();
Brian Carlstromae826982011-11-09 01:33:42 -08002205 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002206 }
2207 lock.NotifyAll();
2208 }
Ian Rogersbdfb1a52012-01-12 14:05:22 -08002209 return success;
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002210}
2211
Brian Carlstromd1422f82011-09-28 11:37:09 -07002212bool ClassLinker::WaitForInitializeClass(Class* klass, Thread* self, ObjectLock& lock) {
2213 while (true) {
Elliott Hughesd9cdfe92011-10-06 16:09:04 -07002214 CHECK(!self->IsExceptionPending()) << PrettyTypeOf(self->GetException());
Brian Carlstromd1422f82011-09-28 11:37:09 -07002215 lock.Wait();
2216
2217 // When we wake up, repeat the test for init-in-progress. If
2218 // there's an exception pending (only possible if
2219 // "interruptShouldThrow" was set), bail out.
2220 if (self->IsExceptionPending()) {
Elliott Hughes4d0207c2011-10-03 19:14:34 -07002221 WrapExceptionInInitializer();
Brian Carlstromd1422f82011-09-28 11:37:09 -07002222 klass->SetStatus(Class::kStatusError);
2223 return false;
2224 }
2225 // Spurious wakeup? Go back to waiting.
2226 if (klass->GetStatus() == Class::kStatusInitializing) {
2227 continue;
2228 }
2229 if (klass->IsErroneous()) {
2230 // The caller wants an exception, but it was thrown in a
2231 // different thread. Synthesize one here.
Brian Carlstromdf143242011-10-10 18:05:34 -07002232 ThrowNoClassDefFoundError("<clinit> failed for class %s; see exception in other thread",
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002233 PrettyDescriptor(klass).c_str());
Brian Carlstromd1422f82011-09-28 11:37:09 -07002234 return false;
2235 }
2236 if (klass->IsInitialized()) {
2237 return true;
2238 }
2239 LOG(FATAL) << "Unexpected class status. " << PrettyClass(klass) << " is " << klass->GetStatus();
2240 }
2241 LOG(FATAL) << "Not Reached" << PrettyClass(klass);
2242}
2243
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002244bool ClassLinker::ValidateSuperClassDescriptors(const Class* klass) {
2245 if (klass->IsInterface()) {
2246 return true;
2247 }
2248 // begin with the methods local to the superclass
2249 if (klass->HasSuperClass() &&
2250 klass->GetClassLoader() != klass->GetSuperClass()->GetClassLoader()) {
2251 const Class* super = klass->GetSuperClass();
Ian Rogers595799e2012-01-11 17:32:51 -08002252 for (int i = super->GetVTable()->GetLength() - 1; i >= 0; --i) {
2253 const Method* method = klass->GetVTable()->Get(i);
2254 if (method != super->GetVTable()->Get(i) &&
2255 !IsSameMethodSignatureInDifferentClassContexts(method, super, klass)) {
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002256 ThrowLinkageError("Class %s method %s resolves differently in superclass %s",
2257 PrettyDescriptor(klass).c_str(), PrettyMethod(method).c_str(),
2258 PrettyDescriptor(super).c_str());
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002259 return false;
2260 }
2261 }
2262 }
Brian Carlstrom4b620ff2011-09-11 01:11:01 -07002263 for (int32_t i = 0; i < klass->GetIfTableCount(); ++i) {
2264 InterfaceEntry* interface_entry = klass->GetIfTable()->Get(i);
2265 Class* interface = interface_entry->GetInterface();
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002266 if (klass->GetClassLoader() != interface->GetClassLoader()) {
2267 for (size_t j = 0; j < interface->NumVirtualMethods(); ++j) {
Brian Carlstrom4b620ff2011-09-11 01:11:01 -07002268 const Method* method = interface_entry->GetMethodArray()->Get(j);
Ian Rogers595799e2012-01-11 17:32:51 -08002269 if (!IsSameMethodSignatureInDifferentClassContexts(method, interface,
2270 method->GetDeclaringClass())) {
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002271 ThrowLinkageError("Class %s method %s resolves differently in interface %s",
2272 PrettyDescriptor(method->GetDeclaringClass()).c_str(),
2273 PrettyMethod(method).c_str(),
2274 PrettyDescriptor(interface).c_str());
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002275 return false;
2276 }
2277 }
2278 }
2279 }
2280 return true;
2281}
2282
Ian Rogers595799e2012-01-11 17:32:51 -08002283// Returns true if classes referenced by the signature of the method are the
2284// same classes in klass1 as they are in klass2.
2285bool ClassLinker::IsSameMethodSignatureInDifferentClassContexts(const Method* method,
2286 const Class* klass1,
2287 const Class* klass2) {
Ian Rogers9074b992011-10-26 17:41:55 -07002288 if (klass1 == klass2) {
2289 return true;
Brian Carlstrome10b6972011-09-26 13:49:03 -07002290 }
Brian Carlstrom27ec9612011-09-19 20:20:38 -07002291 const DexFile& dex_file = FindDexFile(method->GetDeclaringClass()->GetDexCache());
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002292 const DexFile::ProtoId& proto_id =
2293 dex_file.GetMethodPrototype(dex_file.GetMethodId(method->GetDexMethodIndex()));
Ian Rogers0571d352011-11-03 19:51:38 -07002294 for (DexFileParameterIterator it(dex_file, proto_id); it.HasNext(); it.Next()) {
2295 const char* descriptor = it.GetDescriptor();
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002296 if (descriptor == NULL) {
2297 break;
2298 }
2299 if (descriptor[0] == 'L' || descriptor[0] == '[') {
2300 // Found a non-primitive type.
Ian Rogers595799e2012-01-11 17:32:51 -08002301 if (!IsSameDescriptorInDifferentClassContexts(descriptor, klass1, klass2)) {
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002302 return false;
2303 }
2304 }
2305 }
2306 // Check the return type
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07002307 const char* descriptor = dex_file.GetReturnTypeDescriptor(proto_id);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002308 if (descriptor[0] == 'L' || descriptor[0] == '[') {
Ian Rogers595799e2012-01-11 17:32:51 -08002309 if (!IsSameDescriptorInDifferentClassContexts(descriptor, klass1, klass2)) {
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002310 return false;
2311 }
2312 }
2313 return true;
2314}
2315
Ian Rogers595799e2012-01-11 17:32:51 -08002316// Returns true if the descriptor resolves to the same class in the context of klass1 and klass2.
2317bool ClassLinker::IsSameDescriptorInDifferentClassContexts(const char* descriptor,
2318 const Class* klass1,
2319 const Class* klass2) {
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002320 CHECK(descriptor != NULL);
2321 CHECK(klass1 != NULL);
2322 CHECK(klass2 != NULL);
Ian Rogers9074b992011-10-26 17:41:55 -07002323 if (klass1 == klass2) {
2324 return true;
2325 }
Brian Carlstrom578bbdc2011-07-21 14:07:47 -07002326 Class* found1 = FindClass(descriptor, klass1->GetClassLoader());
Ian Rogers595799e2012-01-11 17:32:51 -08002327 if (found1 == NULL) {
Carl Shapirob5573532011-07-12 18:22:59 -07002328 Thread::Current()->ClearException();
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002329 }
Ian Rogers595799e2012-01-11 17:32:51 -08002330 Class* found2 = FindClass(descriptor, klass2->GetClassLoader());
2331 if (found2 == NULL) {
2332 Thread::Current()->ClearException();
2333 }
2334 return found1 == found2;
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002335}
2336
Brian Carlstrom25c33252011-09-18 15:58:35 -07002337bool ClassLinker::InitializeSuperClass(Class* klass, bool can_run_clinit) {
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002338 CHECK(klass != NULL);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002339 if (!klass->IsInterface() && klass->HasSuperClass()) {
2340 Class* super_class = klass->GetSuperClass();
2341 if (super_class->GetStatus() != Class::kStatusInitialized) {
2342 CHECK(!super_class->IsInterface());
Elliott Hughes5f791332011-09-15 17:45:30 -07002343 Thread* self = Thread::Current();
2344 klass->MonitorEnter(self);
Brian Carlstrom25c33252011-09-18 15:58:35 -07002345 bool super_initialized = InitializeClass(super_class, can_run_clinit);
Elliott Hughes5f791332011-09-15 17:45:30 -07002346 klass->MonitorExit(self);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002347 // TODO: check for a pending exception
2348 if (!super_initialized) {
Brian Carlstrom25c33252011-09-18 15:58:35 -07002349 if (!can_run_clinit) {
2350 // Don't set status to error when we can't run <clinit>.
Brian Carlstrome7d856b2012-01-11 18:10:55 -08002351 CHECK_EQ(klass->GetStatus(), Class::kStatusInitializing) << PrettyClass(klass);
Brian Carlstrom25c33252011-09-18 15:58:35 -07002352 klass->SetStatus(Class::kStatusVerified);
2353 return false;
2354 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002355 klass->SetStatus(Class::kStatusError);
2356 klass->NotifyAll();
2357 return false;
2358 }
2359 }
2360 }
2361 return true;
2362}
2363
Brian Carlstrom25c33252011-09-18 15:58:35 -07002364bool ClassLinker::EnsureInitialized(Class* c, bool can_run_clinit) {
Elliott Hughesf4c21c92011-08-19 17:31:31 -07002365 CHECK(c != NULL);
2366 if (c->IsInitialized()) {
2367 return true;
2368 }
2369
Elliott Hughes5f791332011-09-15 17:45:30 -07002370 Thread* self = Thread::Current();
Elliott Hughes4681c802011-09-25 18:04:37 -07002371 ScopedThreadStateChange tsc(self, Thread::kRunnable);
Ian Rogers595799e2012-01-11 17:32:51 -08002372 bool success = InitializeClass(c, can_run_clinit);
2373 if (!success) {
2374 CHECK(self->IsExceptionPending());
2375 }
2376 return success;
Elliott Hughesf4c21c92011-08-19 17:31:31 -07002377}
2378
Elliott Hughes5fe594f2011-09-08 12:33:17 -07002379void ClassLinker::ConstructFieldMap(const DexFile& dex_file, const DexFile::ClassDef& dex_class_def,
Ian Rogers0571d352011-11-03 19:51:38 -07002380 Class* c, std::map<uint32_t, Field*>& field_map) {
Elliott Hughes5fe594f2011-09-08 12:33:17 -07002381 const ClassLoader* cl = c->GetClassLoader();
2382 const byte* class_data = dex_file.GetClassData(dex_class_def);
Ian Rogers0571d352011-11-03 19:51:38 -07002383 ClassDataItemIterator it(dex_file, class_data);
2384 for (size_t i = 0; it.HasNextStaticField(); i++, it.Next()) {
2385 field_map[i] = ResolveField(dex_file, it.GetMemberIndex(), c->GetDexCache(), cl, true);
Elliott Hughes5fe594f2011-09-08 12:33:17 -07002386 }
2387}
2388
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002389void ClassLinker::InitializeStaticFields(Class* klass) {
Carl Shapiro5fafe2b2011-07-09 15:34:41 -07002390 size_t num_static_fields = klass->NumStaticFields();
2391 if (num_static_fields == 0) {
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002392 return;
Carl Shapiro5fafe2b2011-07-09 15:34:41 -07002393 }
Brian Carlstromf615a612011-07-23 12:50:34 -07002394 DexCache* dex_cache = klass->GetDexCache();
Brian Carlstrom4873d462011-08-21 15:23:39 -07002395 // TODO: this seems like the wrong check. do we really want !IsPrimitive && !IsArray?
Brian Carlstromf615a612011-07-23 12:50:34 -07002396 if (dex_cache == NULL) {
Carl Shapiro5fafe2b2011-07-09 15:34:41 -07002397 return;
2398 }
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002399 ClassHelper kh(klass);
2400 const DexFile::ClassDef* dex_class_def = kh.GetClassDef();
Brian Carlstromf615a612011-07-23 12:50:34 -07002401 CHECK(dex_class_def != NULL);
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002402 const DexFile& dex_file = kh.GetDexFile();
Ian Rogers0571d352011-11-03 19:51:38 -07002403 EncodedStaticFieldValueIterator it(dex_file, dex_cache, this, *dex_class_def);
Elliott Hughes5fe594f2011-09-08 12:33:17 -07002404
Ian Rogers0571d352011-11-03 19:51:38 -07002405 if (it.HasNext()) {
2406 // We reordered the fields, so we need to be able to map the field indexes to the right fields.
2407 std::map<uint32_t, Field*> field_map;
2408 ConstructFieldMap(dex_file, *dex_class_def, klass, field_map);
2409 for (size_t i = 0; it.HasNext(); i++, it.Next()) {
2410 it.ReadValueToField(field_map[i]);
Carl Shapiro5fafe2b2011-07-09 15:34:41 -07002411 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002412 }
2413}
2414
Ian Rogersc2b44472011-12-14 21:17:17 -08002415bool ClassLinker::LinkClass(SirtRef<Class>& klass, ObjectArray<Class>* interfaces) {
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002416 CHECK_EQ(Class::kStatusLoaded, klass->GetStatus());
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002417 if (!LinkSuperClass(klass)) {
2418 return false;
2419 }
Ian Rogersc2b44472011-12-14 21:17:17 -08002420 if (!LinkMethods(klass, interfaces)) {
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002421 return false;
2422 }
2423 if (!LinkInstanceFields(klass)) {
2424 return false;
2425 }
Brian Carlstrom4873d462011-08-21 15:23:39 -07002426 if (!LinkStaticFields(klass)) {
2427 return false;
2428 }
2429 CreateReferenceInstanceOffsets(klass);
2430 CreateReferenceStaticOffsets(klass);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002431 CHECK_EQ(Class::kStatusLoaded, klass->GetStatus());
2432 klass->SetStatus(Class::kStatusResolved);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002433 return true;
2434}
2435
Brian Carlstrom40381fb2011-10-19 14:13:40 -07002436bool ClassLinker::LoadSuperAndInterfaces(SirtRef<Class>& klass, const DexFile& dex_file) {
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002437 CHECK_EQ(Class::kStatusIdx, klass->GetStatus());
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002438 StringPiece descriptor(dex_file.StringByTypeIdx(klass->GetDexTypeIndex()));
2439 const DexFile::ClassDef* class_def = dex_file.FindClassDef(descriptor);
Ian Rogerscab01012012-01-10 17:35:46 -08002440 CHECK(class_def != NULL);
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002441 uint16_t super_class_idx = class_def->superclass_idx_;
2442 if (super_class_idx != DexFile::kDexNoIndex16) {
2443 Class* super_class = ResolveType(dex_file, super_class_idx, klass.get());
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002444 if (super_class == NULL) {
Brian Carlstrom65ca0772011-09-24 16:03:08 -07002445 DCHECK(Thread::Current()->IsExceptionPending());
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002446 return false;
2447 }
Ian Rogersbe125a92012-01-11 15:19:49 -08002448 // Verify
2449 if (!klass->CanAccess(super_class)) {
2450 Thread::Current()->ThrowNewExceptionF("Ljava/lang/IllegalAccessError;",
2451 "Class %s extended by class %s is inaccessible",
2452 PrettyDescriptor(super_class).c_str(),
2453 PrettyDescriptor(klass.get()).c_str());
2454 return false;
2455 }
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002456 klass->SetSuperClass(super_class);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002457 }
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002458 const DexFile::TypeList* interfaces = dex_file.GetInterfacesList(*class_def);
2459 if (interfaces != NULL) {
2460 for (size_t i = 0; i < interfaces->Size(); i++) {
2461 uint16_t idx = interfaces->GetTypeItem(i).type_idx_;
2462 Class* interface = ResolveType(dex_file, idx, klass.get());
2463 if (interface == NULL) {
2464 DCHECK(Thread::Current()->IsExceptionPending());
2465 return false;
2466 }
2467 // Verify
2468 if (!klass->CanAccess(interface)) {
2469 // TODO: the RI seemed to ignore this in my testing.
2470 Thread::Current()->ThrowNewExceptionF("Ljava/lang/IllegalAccessError;",
2471 "Interface %s implemented by class %s is inaccessible",
2472 PrettyDescriptor(interface).c_str(),
2473 PrettyDescriptor(klass.get()).c_str());
2474 return false;
2475 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002476 }
2477 }
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07002478 // Mark the class as loaded.
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002479 klass->SetStatus(Class::kStatusLoaded);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002480 return true;
2481}
2482
Brian Carlstrom40381fb2011-10-19 14:13:40 -07002483bool ClassLinker::LinkSuperClass(SirtRef<Class>& klass) {
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002484 CHECK(!klass->IsPrimitive());
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002485 Class* super = klass->GetSuperClass();
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002486 if (klass.get() == GetClassRoot(kJavaLangObject)) {
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002487 if (super != NULL) {
Elliott Hughes5cb5ad22011-10-02 12:13:39 -07002488 Thread::Current()->ThrowNewExceptionF("Ljava/lang/ClassFormatError;",
Elliott Hughes4a2b4172011-09-20 17:08:25 -07002489 "java.lang.Object must not have a superclass");
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002490 return false;
2491 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002492 return true;
2493 }
2494 if (super == NULL) {
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002495 ThrowLinkageError("No superclass defined for class %s", PrettyDescriptor(klass.get()).c_str());
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002496 return false;
2497 }
2498 // Verify
Elliott Hughes4a2b4172011-09-20 17:08:25 -07002499 if (super->IsFinal() || super->IsInterface()) {
Ian Rogers5fc5a0c2011-12-13 10:39:49 -08002500 Thread* thread = Thread::Current();
2501 thread->ThrowNewExceptionF("Ljava/lang/IncompatibleClassChangeError;",
Elliott Hughese555dc02011-09-25 10:46:35 -07002502 "Superclass %s of %s is %s",
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002503 PrettyDescriptor(super).c_str(),
2504 PrettyDescriptor(klass.get()).c_str(),
Elliott Hughes4a2b4172011-09-20 17:08:25 -07002505 super->IsFinal() ? "declared final" : "an interface");
Ian Rogers5fc5a0c2011-12-13 10:39:49 -08002506 klass->SetVerifyErrorClass(thread->GetException()->GetClass());
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002507 return false;
2508 }
2509 if (!klass->CanAccess(super)) {
Elliott Hughes5cb5ad22011-10-02 12:13:39 -07002510 Thread::Current()->ThrowNewExceptionF("Ljava/lang/IllegalAccessError;",
Elliott Hughese555dc02011-09-25 10:46:35 -07002511 "Superclass %s is inaccessible by %s",
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002512 PrettyDescriptor(super).c_str(),
2513 PrettyDescriptor(klass.get()).c_str());
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002514 return false;
2515 }
Elliott Hughes20cde902011-10-04 17:37:27 -07002516
2517 // Inherit kAccClassIsFinalizable from the superclass in case this class doesn't override finalize.
2518 if (super->IsFinalizable()) {
2519 klass->SetFinalizable();
2520 }
2521
Elliott Hughes2da50362011-10-10 16:57:08 -07002522 // Inherit reference flags (if any) from the superclass.
2523 int reference_flags = (super->GetAccessFlags() & kAccReferenceFlagsMask);
2524 if (reference_flags != 0) {
2525 klass->SetAccessFlags(klass->GetAccessFlags() | reference_flags);
2526 }
Elliott Hughes72ee0ae2011-10-10 17:31:28 -07002527 // Disallow custom direct subclasses of java.lang.ref.Reference.
Elliott Hughesbf61ba32011-10-11 10:53:09 -07002528 if (init_done_ && super == GetClassRoot(kJavaLangRefReference)) {
Elliott Hughes72ee0ae2011-10-10 17:31:28 -07002529 ThrowLinkageError("Class %s attempts to subclass java.lang.ref.Reference, which is not allowed",
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002530 PrettyDescriptor(klass.get()).c_str());
Elliott Hughes72ee0ae2011-10-10 17:31:28 -07002531 return false;
2532 }
Elliott Hughes2da50362011-10-10 16:57:08 -07002533
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002534#ifndef NDEBUG
2535 // Ensure super classes are fully resolved prior to resolving fields..
2536 while (super != NULL) {
Elliott Hughes5fe594f2011-09-08 12:33:17 -07002537 CHECK(super->IsResolved());
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002538 super = super->GetSuperClass();
2539 }
2540#endif
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002541 return true;
2542}
2543
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002544// Populate the class vtable and itable. Compute return type indices.
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002545bool ClassLinker::LinkMethods(SirtRef<Class>& klass, ObjectArray<Class>* interfaces) {
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002546 if (klass->IsInterface()) {
2547 // No vtable.
2548 size_t count = klass->NumVirtualMethods();
2549 if (!IsUint(16, count)) {
Elliott Hughes92cb4982011-12-16 16:57:28 -08002550 ThrowClassFormatError("Too many methods on interface: %zd", count);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002551 return false;
2552 }
Carl Shapiro565f5072011-07-10 13:39:43 -07002553 for (size_t i = 0; i < count; ++i) {
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002554 klass->GetVirtualMethodDuringLinking(i)->SetMethodIndex(i);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002555 }
jeffhaobdb76512011-09-07 11:43:16 -07002556 // Link interface method tables
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002557 return LinkInterfaceMethods(klass, interfaces);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002558 } else {
Elliott Hughesbc258fa2011-10-06 14:45:21 -07002559 // Link virtual and interface method tables
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002560 return LinkVirtualMethods(klass) && LinkInterfaceMethods(klass, interfaces);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002561 }
2562 return true;
2563}
2564
Brian Carlstrom40381fb2011-10-19 14:13:40 -07002565bool ClassLinker::LinkVirtualMethods(SirtRef<Class>& klass) {
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002566 if (klass->HasSuperClass()) {
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002567 uint32_t max_count = klass->NumVirtualMethods() + klass->GetSuperClass()->GetVTable()->GetLength();
2568 size_t actual_count = klass->GetSuperClass()->GetVTable()->GetLength();
Brian Carlstrom4a96b602011-07-26 16:40:23 -07002569 CHECK_LE(actual_count, max_count);
Brian Carlstroma40f9bc2011-07-26 21:26:07 -07002570 // TODO: do not assign to the vtable field until it is fully constructed.
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002571 ObjectArray<Method>* vtable = klass->GetSuperClass()->GetVTable()->CopyOf(max_count);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002572 // See if any of our virtual methods override the superclass.
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002573 MethodHelper local_mh(NULL, this);
2574 MethodHelper super_mh(NULL, this);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002575 for (size_t i = 0; i < klass->NumVirtualMethods(); ++i) {
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002576 Method* local_method = klass->GetVirtualMethodDuringLinking(i);
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002577 local_mh.ChangeMethod(local_method);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002578 size_t j = 0;
Brian Carlstrom4a96b602011-07-26 16:40:23 -07002579 for (; j < actual_count; ++j) {
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002580 Method* super_method = vtable->Get(j);
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002581 super_mh.ChangeMethod(super_method);
2582 if (local_mh.HasSameNameAndSignature(&super_mh)) {
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002583 // Verify
2584 if (super_method->IsFinal()) {
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002585 MethodHelper mh(local_method);
Elliott Hughese555dc02011-09-25 10:46:35 -07002586 ThrowLinkageError("Method %s.%s overrides final method in class %s",
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002587 PrettyDescriptor(klass.get()).c_str(),
2588 mh.GetName(), mh.GetDeclaringClassDescriptor());
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002589 return false;
2590 }
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002591 vtable->Set(j, local_method);
2592 local_method->SetMethodIndex(j);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002593 break;
2594 }
2595 }
Brian Carlstrom4a96b602011-07-26 16:40:23 -07002596 if (j == actual_count) {
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002597 // Not overriding, append.
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002598 vtable->Set(actual_count, local_method);
2599 local_method->SetMethodIndex(actual_count);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002600 actual_count += 1;
2601 }
2602 }
2603 if (!IsUint(16, actual_count)) {
Elliott Hughes92cb4982011-12-16 16:57:28 -08002604 ThrowClassFormatError("Too many methods defined on class: %zd", actual_count);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002605 return false;
2606 }
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002607 // Shrink vtable if possible
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002608 CHECK_LE(actual_count, max_count);
2609 if (actual_count < max_count) {
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002610 vtable = vtable->CopyOf(actual_count);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002611 }
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002612 klass->SetVTable(vtable);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002613 } else {
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002614 CHECK(klass.get() == GetClassRoot(kJavaLangObject));
Brian Carlstroma40f9bc2011-07-26 21:26:07 -07002615 uint32_t num_virtual_methods = klass->NumVirtualMethods();
Brian Carlstroma40f9bc2011-07-26 21:26:07 -07002616 if (!IsUint(16, num_virtual_methods)) {
Elliott Hughese555dc02011-09-25 10:46:35 -07002617 ThrowClassFormatError("Too many methods: %d", num_virtual_methods);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002618 return false;
2619 }
Brian Carlstrom40381fb2011-10-19 14:13:40 -07002620 SirtRef<ObjectArray<Method> > vtable(AllocObjectArray<Method>(num_virtual_methods));
Brian Carlstroma40f9bc2011-07-26 21:26:07 -07002621 for (size_t i = 0; i < num_virtual_methods; ++i) {
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002622 Method* virtual_method = klass->GetVirtualMethodDuringLinking(i);
2623 vtable->Set(i, virtual_method);
2624 virtual_method->SetMethodIndex(i & 0xFFFF);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002625 }
Brian Carlstrom40381fb2011-10-19 14:13:40 -07002626 klass->SetVTable(vtable.get());
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002627 }
2628 return true;
2629}
2630
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002631bool ClassLinker::LinkInterfaceMethods(SirtRef<Class>& klass, ObjectArray<Class>* interfaces) {
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002632 size_t super_ifcount;
2633 if (klass->HasSuperClass()) {
Brian Carlstrom4b620ff2011-09-11 01:11:01 -07002634 super_ifcount = klass->GetSuperClass()->GetIfTableCount();
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002635 } else {
2636 super_ifcount = 0;
2637 }
Brian Carlstrom913af1b2011-07-23 21:41:13 -07002638 size_t ifcount = super_ifcount;
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002639 ClassHelper kh(klass.get(), this);
2640 uint32_t num_interfaces = interfaces == NULL ? kh.NumInterfaces() : interfaces->GetLength();
2641 ifcount += num_interfaces;
2642 for (size_t i = 0; i < num_interfaces; i++) {
2643 Class* interface = interfaces == NULL ? kh.GetInterface(i) : interfaces->Get(i);
2644 ifcount += interface->GetIfTableCount();
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002645 }
Brian Carlstrom913af1b2011-07-23 21:41:13 -07002646 if (ifcount == 0) {
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002647 // TODO: enable these asserts with klass status validation
Elliott Hughesf5a7a472011-10-07 14:31:02 -07002648 // DCHECK_EQ(klass->GetIfTableCount(), 0);
Brian Carlstrom4b620ff2011-09-11 01:11:01 -07002649 // DCHECK(klass->GetIfTable() == NULL);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002650 return true;
2651 }
Brian Carlstrom40381fb2011-10-19 14:13:40 -07002652 SirtRef<ObjectArray<InterfaceEntry> > iftable(AllocObjectArray<InterfaceEntry>(ifcount));
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002653 if (super_ifcount != 0) {
Brian Carlstrom4b620ff2011-09-11 01:11:01 -07002654 ObjectArray<InterfaceEntry>* super_iftable = klass->GetSuperClass()->GetIfTable();
2655 for (size_t i = 0; i < super_ifcount; i++) {
Ian Rogersb52b01a2012-01-12 17:01:38 -08002656 Class* super_interface = super_iftable->Get(i)->GetInterface();
2657 iftable->Set(i, AllocInterfaceEntry(super_interface));
Brian Carlstrom4b620ff2011-09-11 01:11:01 -07002658 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002659 }
2660 // Flatten the interface inheritance hierarchy.
2661 size_t idx = super_ifcount;
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002662 for (size_t i = 0; i < num_interfaces; i++) {
2663 Class* interface = interfaces == NULL ? kh.GetInterface(i) : interfaces->Get(i);
Brian Carlstrom4b620ff2011-09-11 01:11:01 -07002664 DCHECK(interface != NULL);
2665 if (!interface->IsInterface()) {
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002666 ClassHelper ih(interface);
Ian Rogers5fc5a0c2011-12-13 10:39:49 -08002667 Thread* thread = Thread::Current();
2668 thread->ThrowNewExceptionF("Ljava/lang/IncompatibleClassChangeError;",
Elliott Hughes4a2b4172011-09-20 17:08:25 -07002669 "Class %s implements non-interface class %s",
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002670 PrettyDescriptor(klass.get()).c_str(),
2671 PrettyDescriptor(ih.GetDescriptor()).c_str());
Ian Rogers5fc5a0c2011-12-13 10:39:49 -08002672 klass->SetVerifyErrorClass(thread->GetException()->GetClass());
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002673 return false;
2674 }
Ian Rogersb52b01a2012-01-12 17:01:38 -08002675 // Check if interface is already in iftable
2676 bool duplicate = false;
2677 for (size_t j = 0; j < idx; j++) {
2678 Class* existing_interface = iftable->Get(j)->GetInterface();
2679 if (existing_interface == interface) {
2680 duplicate = true;
2681 break;
2682 }
2683 }
2684 if (!duplicate) {
2685 // Add this non-duplicate interface.
2686 iftable->Set(idx++, AllocInterfaceEntry(interface));
2687 // Add this interface's non-duplicate super-interfaces.
2688 for (int32_t j = 0; j < interface->GetIfTableCount(); j++) {
2689 Class* super_interface = interface->GetIfTable()->Get(j)->GetInterface();
2690 bool super_duplicate = false;
2691 for (size_t k = 0; k < idx; k++) {
2692 Class* existing_interface = iftable->Get(k)->GetInterface();
2693 if (existing_interface == super_interface) {
2694 super_duplicate = true;
2695 break;
2696 }
2697 }
2698 if (!super_duplicate) {
2699 iftable->Set(idx++, AllocInterfaceEntry(super_interface));
2700 }
2701 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002702 }
2703 }
Ian Rogersb52b01a2012-01-12 17:01:38 -08002704 // Shrink iftable in case duplicates were found
2705 if (idx < ifcount) {
2706 iftable.reset(iftable->CopyOf(idx));
2707 ifcount = idx;
2708 } else {
2709 CHECK_EQ(idx, ifcount);
2710 }
Brian Carlstrom40381fb2011-10-19 14:13:40 -07002711 klass->SetIfTable(iftable.get());
Elliott Hughes4681c802011-09-25 18:04:37 -07002712
2713 // If we're an interface, we don't need the vtable pointers, so we're done.
2714 if (klass->IsInterface() /*|| super_ifcount == ifcount*/) {
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002715 return true;
2716 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002717 std::vector<Method*> miranda_list;
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002718 MethodHelper vtable_mh(NULL, this);
2719 MethodHelper interface_mh(NULL, this);
Brian Carlstrom4b620ff2011-09-11 01:11:01 -07002720 for (size_t i = 0; i < ifcount; ++i) {
2721 InterfaceEntry* interface_entry = iftable->Get(i);
2722 Class* interface = interface_entry->GetInterface();
2723 ObjectArray<Method>* method_array = AllocObjectArray<Method>(interface->NumVirtualMethods());
2724 interface_entry->SetMethodArray(method_array);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002725 ObjectArray<Method>* vtable = klass->GetVTableDuringLinking();
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002726 for (size_t j = 0; j < interface->NumVirtualMethods(); ++j) {
2727 Method* interface_method = interface->GetVirtualMethod(j);
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002728 interface_mh.ChangeMethod(interface_method);
Brian Carlstrom4b620ff2011-09-11 01:11:01 -07002729 int32_t k;
Elliott Hughes4681c802011-09-25 18:04:37 -07002730 // For each method listed in the interface's method list, find the
2731 // matching method in our class's method list. We want to favor the
2732 // subclass over the superclass, which just requires walking
2733 // back from the end of the vtable. (This only matters if the
2734 // superclass defines a private method and this class redefines
2735 // it -- otherwise it would use the same vtable slot. In .dex files
2736 // those don't end up in the virtual method table, so it shouldn't
2737 // matter which direction we go. We walk it backward anyway.)
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002738 for (k = vtable->GetLength() - 1; k >= 0; --k) {
2739 Method* vtable_method = vtable->Get(k);
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002740 vtable_mh.ChangeMethod(vtable_method);
2741 if (interface_mh.HasSameNameAndSignature(&vtable_mh)) {
Carl Shapiro8860c0e2011-08-04 17:36:16 -07002742 if (!vtable_method->IsPublic()) {
Elliott Hughes5cb5ad22011-10-02 12:13:39 -07002743 Thread::Current()->ThrowNewExceptionF("Ljava/lang/IllegalAccessError;",
Elliott Hughes4a2b4172011-09-20 17:08:25 -07002744 "Implementation not public: %s", PrettyMethod(vtable_method).c_str());
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002745 return false;
2746 }
Brian Carlstrom4b620ff2011-09-11 01:11:01 -07002747 method_array->Set(j, vtable_method);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002748 break;
2749 }
2750 }
2751 if (k < 0) {
Brian Carlstrom40381fb2011-10-19 14:13:40 -07002752 SirtRef<Method> miranda_method(NULL);
Elliott Hughes4681c802011-09-25 18:04:37 -07002753 for (size_t mir = 0; mir < miranda_list.size(); mir++) {
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002754 Method* mir_method = miranda_list[mir];
2755 vtable_mh.ChangeMethod(mir_method);
2756 if (interface_mh.HasSameNameAndSignature(&vtable_mh)) {
Brian Carlstrom40381fb2011-10-19 14:13:40 -07002757 miranda_method.reset(miranda_list[mir]);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002758 break;
2759 }
2760 }
Brian Carlstrom40381fb2011-10-19 14:13:40 -07002761 if (miranda_method.get() == NULL) {
Elliott Hughes4681c802011-09-25 18:04:37 -07002762 // point the interface table at a phantom slot
Brian Carlstrom40381fb2011-10-19 14:13:40 -07002763 miranda_method.reset(AllocMethod());
2764 memcpy(miranda_method.get(), interface_method, sizeof(Method));
2765 miranda_list.push_back(miranda_method.get());
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002766 }
Brian Carlstrom40381fb2011-10-19 14:13:40 -07002767 method_array->Set(j, miranda_method.get());
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002768 }
2769 }
2770 }
Elliott Hughes4681c802011-09-25 18:04:37 -07002771 if (!miranda_list.empty()) {
Brian Carlstrom913af1b2011-07-23 21:41:13 -07002772 int old_method_count = klass->NumVirtualMethods();
Elliott Hughes4681c802011-09-25 18:04:37 -07002773 int new_method_count = old_method_count + miranda_list.size();
Brian Carlstrom27ec9612011-09-19 20:20:38 -07002774 klass->SetVirtualMethods((old_method_count == 0)
2775 ? AllocObjectArray<Method>(new_method_count)
2776 : klass->GetVirtualMethods()->CopyOf(new_method_count));
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002777
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002778 ObjectArray<Method>* vtable = klass->GetVTableDuringLinking();
2779 CHECK(vtable != NULL);
2780 int old_vtable_count = vtable->GetLength();
Elliott Hughes4681c802011-09-25 18:04:37 -07002781 int new_vtable_count = old_vtable_count + miranda_list.size();
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002782 vtable = vtable->CopyOf(new_vtable_count);
Elliott Hughes4681c802011-09-25 18:04:37 -07002783 for (size_t i = 0; i < miranda_list.size(); ++i) {
Brian Carlstrom92827a52011-10-10 15:50:01 -07002784 Method* method = miranda_list[i];
Ian Rogers9074b992011-10-26 17:41:55 -07002785 // Leave the declaring class alone as type indices are relative to it
Brian Carlstrom92827a52011-10-10 15:50:01 -07002786 method->SetAccessFlags(method->GetAccessFlags() | kAccMiranda);
2787 method->SetMethodIndex(0xFFFF & (old_vtable_count + i));
2788 klass->SetVirtualMethod(old_method_count + i, method);
2789 vtable->Set(old_vtable_count + i, method);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002790 }
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002791 // TODO: do not assign to the vtable field until it is fully constructed.
2792 klass->SetVTable(vtable);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002793 }
Elliott Hughes4681c802011-09-25 18:04:37 -07002794
2795 ObjectArray<Method>* vtable = klass->GetVTableDuringLinking();
2796 for (int i = 0; i < vtable->GetLength(); ++i) {
2797 CHECK(vtable->Get(i) != NULL);
2798 }
2799
2800// klass->DumpClass(std::cerr, Class::kDumpClassFullDetail);
2801
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002802 return true;
2803}
2804
Brian Carlstrom40381fb2011-10-19 14:13:40 -07002805bool ClassLinker::LinkInstanceFields(SirtRef<Class>& klass) {
2806 CHECK(klass.get() != NULL);
Brian Carlstrom3320cf42011-10-04 14:58:28 -07002807 return LinkFields(klass, false);
Brian Carlstrom4873d462011-08-21 15:23:39 -07002808}
2809
Brian Carlstrom40381fb2011-10-19 14:13:40 -07002810bool ClassLinker::LinkStaticFields(SirtRef<Class>& klass) {
2811 CHECK(klass.get() != NULL);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002812 size_t allocated_class_size = klass->GetClassSize();
Brian Carlstrom3320cf42011-10-04 14:58:28 -07002813 bool success = LinkFields(klass, true);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002814 CHECK_EQ(allocated_class_size, klass->GetClassSize());
Brian Carlstrom4873d462011-08-21 15:23:39 -07002815 return success;
2816}
2817
Brian Carlstromdbc05252011-09-09 01:59:59 -07002818struct LinkFieldsComparator {
Elliott Hughesba8eee12012-01-24 20:25:24 -08002819 explicit LinkFieldsComparator(FieldHelper* fh) : fh_(fh) {}
Elliott Hughes3b6baaa2011-10-14 19:13:56 -07002820 bool operator()(const Field* field1, const Field* field2) {
Brian Carlstromdbc05252011-09-09 01:59:59 -07002821 // First come reference fields, then 64-bit, and finally 32-bit
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002822 fh_->ChangeField(field1);
2823 Primitive::Type type1 = fh_->GetTypeAsPrimitiveType();
2824 fh_->ChangeField(field2);
2825 Primitive::Type type2 = fh_->GetTypeAsPrimitiveType();
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07002826 bool isPrimitive1 = type1 != Primitive::kPrimNot;
2827 bool isPrimitive2 = type2 != Primitive::kPrimNot;
2828 bool is64bit1 = isPrimitive1 && (type1 == Primitive::kPrimLong || type1 == Primitive::kPrimDouble);
2829 bool is64bit2 = isPrimitive2 && (type2 == Primitive::kPrimLong || type2 == Primitive::kPrimDouble);
Brian Carlstromdbc05252011-09-09 01:59:59 -07002830 int order1 = (!isPrimitive1 ? 0 : (is64bit1 ? 1 : 2));
2831 int order2 = (!isPrimitive2 ? 0 : (is64bit2 ? 1 : 2));
2832 if (order1 != order2) {
2833 return order1 < order2;
2834 }
2835
2836 // same basic group? then sort by string.
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002837 fh_->ChangeField(field1);
2838 StringPiece name1(fh_->GetName());
2839 fh_->ChangeField(field2);
2840 StringPiece name2(fh_->GetName());
Brian Carlstromdbc05252011-09-09 01:59:59 -07002841 return name1 < name2;
2842 }
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002843
2844 FieldHelper* fh_;
Brian Carlstromdbc05252011-09-09 01:59:59 -07002845};
2846
Brian Carlstrom40381fb2011-10-19 14:13:40 -07002847bool ClassLinker::LinkFields(SirtRef<Class>& klass, bool is_static) {
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002848 size_t num_fields =
Brian Carlstrom3320cf42011-10-04 14:58:28 -07002849 is_static ? klass->NumStaticFields() : klass->NumInstanceFields();
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002850
2851 ObjectArray<Field>* fields =
Brian Carlstrom3320cf42011-10-04 14:58:28 -07002852 is_static ? klass->GetSFields() : klass->GetIFields();
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002853
2854 // Initialize size and field_offset
Brian Carlstrom693267a2011-09-06 09:25:34 -07002855 size_t size;
2856 MemberOffset field_offset(0);
Brian Carlstrom3320cf42011-10-04 14:58:28 -07002857 if (is_static) {
2858 size = klass->GetClassSize();
2859 field_offset = Class::FieldsOffset();
2860 } else {
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002861 Class* super_class = klass->GetSuperClass();
2862 if (super_class != NULL) {
Elliott Hughes5fe594f2011-09-08 12:33:17 -07002863 CHECK(super_class->IsResolved());
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002864 field_offset = MemberOffset(super_class->GetObjectSize());
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002865 }
2866 size = field_offset.Uint32Value();
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002867 }
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002868
Brian Carlstromdbc05252011-09-09 01:59:59 -07002869 CHECK_EQ(num_fields == 0, fields == NULL);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002870
Brian Carlstromdbc05252011-09-09 01:59:59 -07002871 // we want a relatively stable order so that adding new fields
Elliott Hughesadb460d2011-10-05 17:02:34 -07002872 // minimizes disruption of C++ version such as Class and Method.
Brian Carlstromdbc05252011-09-09 01:59:59 -07002873 std::deque<Field*> grouped_and_sorted_fields;
2874 for (size_t i = 0; i < num_fields; i++) {
2875 grouped_and_sorted_fields.push_back(fields->Get(i));
2876 }
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002877 FieldHelper fh(NULL, this);
Brian Carlstromdbc05252011-09-09 01:59:59 -07002878 std::sort(grouped_and_sorted_fields.begin(),
2879 grouped_and_sorted_fields.end(),
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002880 LinkFieldsComparator(&fh));
Brian Carlstromdbc05252011-09-09 01:59:59 -07002881
2882 // References should be at the front.
2883 size_t current_field = 0;
2884 size_t num_reference_fields = 0;
2885 for (; current_field < num_fields; current_field++) {
2886 Field* field = grouped_and_sorted_fields.front();
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002887 fh.ChangeField(field);
2888 Primitive::Type type = fh.GetTypeAsPrimitiveType();
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07002889 bool isPrimitive = type != Primitive::kPrimNot;
Brian Carlstromdbc05252011-09-09 01:59:59 -07002890 if (isPrimitive) {
2891 break; // past last reference, move on to the next phase
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002892 }
Brian Carlstromdbc05252011-09-09 01:59:59 -07002893 grouped_and_sorted_fields.pop_front();
2894 num_reference_fields++;
2895 fields->Set(current_field, field);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002896 field->SetOffset(field_offset);
2897 field_offset = MemberOffset(field_offset.Uint32Value() + sizeof(uint32_t));
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002898 }
2899
2900 // Now we want to pack all of the double-wide fields together. If
2901 // we're not aligned, though, we want to shuffle one 32-bit field
2902 // into place. If we can't find one, we'll have to pad it.
Elliott Hughes06b37d92011-10-16 11:51:29 -07002903 if (current_field != num_fields && !IsAligned<8>(field_offset.Uint32Value())) {
Brian Carlstromdbc05252011-09-09 01:59:59 -07002904 for (size_t i = 0; i < grouped_and_sorted_fields.size(); i++) {
2905 Field* field = grouped_and_sorted_fields[i];
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002906 fh.ChangeField(field);
2907 Primitive::Type type = fh.GetTypeAsPrimitiveType();
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07002908 CHECK(type != Primitive::kPrimNot); // should only be working on primitive types
2909 if (type == Primitive::kPrimLong || type == Primitive::kPrimDouble) {
Brian Carlstromdbc05252011-09-09 01:59:59 -07002910 continue;
2911 }
2912 fields->Set(current_field++, field);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002913 field->SetOffset(field_offset);
Brian Carlstromdbc05252011-09-09 01:59:59 -07002914 // drop the consumed field
2915 grouped_and_sorted_fields.erase(grouped_and_sorted_fields.begin() + i);
2916 break;
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002917 }
Brian Carlstromdbc05252011-09-09 01:59:59 -07002918 // whether we found a 32-bit field for padding or not, we advance
2919 field_offset = MemberOffset(field_offset.Uint32Value() + sizeof(uint32_t));
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002920 }
2921
2922 // Alignment is good, shuffle any double-wide fields forward, and
2923 // finish assigning field offsets to all fields.
Elliott Hughes06b37d92011-10-16 11:51:29 -07002924 DCHECK(current_field == num_fields || IsAligned<8>(field_offset.Uint32Value()));
Brian Carlstromdbc05252011-09-09 01:59:59 -07002925 while (!grouped_and_sorted_fields.empty()) {
2926 Field* field = grouped_and_sorted_fields.front();
2927 grouped_and_sorted_fields.pop_front();
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002928 fh.ChangeField(field);
2929 Primitive::Type type = fh.GetTypeAsPrimitiveType();
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07002930 CHECK(type != Primitive::kPrimNot); // should only be working on primitive types
Brian Carlstromdbc05252011-09-09 01:59:59 -07002931 fields->Set(current_field, field);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002932 field->SetOffset(field_offset);
Brian Carlstromdbc05252011-09-09 01:59:59 -07002933 field_offset = MemberOffset(field_offset.Uint32Value() +
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07002934 ((type == Primitive::kPrimLong || type == Primitive::kPrimDouble)
Brian Carlstromdbc05252011-09-09 01:59:59 -07002935 ? sizeof(uint64_t)
2936 : sizeof(uint32_t)));
2937 current_field++;
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002938 }
2939
Elliott Hughesadb460d2011-10-05 17:02:34 -07002940 // 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 -08002941 std::string descriptor(ClassHelper(klass.get(), this).GetDescriptor());
2942 if (!is_static && descriptor == "Ljava/lang/ref/Reference;") {
Elliott Hughesadb460d2011-10-05 17:02:34 -07002943 // We know there are no non-reference fields in the Reference classes, and we know
2944 // that 'referent' is alphabetically last, so this is easy...
2945 CHECK_EQ(num_reference_fields, num_fields);
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002946 fh.ChangeField(fields->Get(num_fields - 1));
Elliott Hughesba8eee12012-01-24 20:25:24 -08002947 CHECK_STREQ(fh.GetName(), "referent");
Elliott Hughesadb460d2011-10-05 17:02:34 -07002948 --num_reference_fields;
2949 }
2950
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002951#ifndef NDEBUG
Brian Carlstrombe977852011-07-19 14:54:54 -07002952 // Make sure that all reference fields appear before
2953 // non-reference fields, and all double-wide fields are aligned.
2954 bool seen_non_ref = false;
Brian Carlstromdbc05252011-09-09 01:59:59 -07002955 for (size_t i = 0; i < num_fields; i++) {
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002956 Field* field = fields->Get(i);
Brian Carlstromdbc05252011-09-09 01:59:59 -07002957 if (false) { // enable to debug field layout
Brian Carlstrom3320cf42011-10-04 14:58:28 -07002958 LOG(INFO) << "LinkFields: " << (is_static ? "static" : "instance")
Brian Carlstrom40381fb2011-10-19 14:13:40 -07002959 << " class=" << PrettyClass(klass.get())
Brian Carlstrom65ca0772011-09-24 16:03:08 -07002960 << " field=" << PrettyField(field)
Brian Carlstromdbc05252011-09-09 01:59:59 -07002961 << " offset=" << field->GetField32(MemberOffset(Field::OffsetOffset()), false);
2962 }
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002963 fh.ChangeField(field);
2964 Primitive::Type type = fh.GetTypeAsPrimitiveType();
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07002965 bool is_primitive = type != Primitive::kPrimNot;
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002966 if (descriptor == "Ljava/lang/ref/Reference;" && StringPiece(fh.GetName()) == "referent") {
Elliott Hughesadb460d2011-10-05 17:02:34 -07002967 is_primitive = true; // We lied above, so we have to expect a lie here.
2968 }
2969 if (is_primitive) {
Brian Carlstrombe977852011-07-19 14:54:54 -07002970 if (!seen_non_ref) {
2971 seen_non_ref = true;
Brian Carlstrom4873d462011-08-21 15:23:39 -07002972 DCHECK_EQ(num_reference_fields, i);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002973 }
Brian Carlstrombe977852011-07-19 14:54:54 -07002974 } else {
2975 DCHECK(!seen_non_ref);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002976 }
2977 }
Brian Carlstrombe977852011-07-19 14:54:54 -07002978 if (!seen_non_ref) {
Brian Carlstrom4873d462011-08-21 15:23:39 -07002979 DCHECK_EQ(num_fields, num_reference_fields);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002980 }
2981#endif
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002982 size = field_offset.Uint32Value();
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002983 // Update klass
Brian Carlstrom3320cf42011-10-04 14:58:28 -07002984 if (is_static) {
2985 klass->SetNumReferenceStaticFields(num_reference_fields);
2986 klass->SetClassSize(size);
2987 } else {
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002988 klass->SetNumReferenceInstanceFields(num_reference_fields);
Brian Carlstromdbc05252011-09-09 01:59:59 -07002989 if (!klass->IsVariableSize()) {
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002990 klass->SetObjectSize(size);
2991 }
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002992 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002993 return true;
2994}
2995
2996// Set the bitmap of reference offsets, refOffsets, from the ifields
2997// list.
Brian Carlstrom40381fb2011-10-19 14:13:40 -07002998void ClassLinker::CreateReferenceInstanceOffsets(SirtRef<Class>& klass) {
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002999 uint32_t reference_offsets = 0;
3000 Class* super_class = klass->GetSuperClass();
3001 if (super_class != NULL) {
3002 reference_offsets = super_class->GetReferenceInstanceOffsets();
Brian Carlstrom4873d462011-08-21 15:23:39 -07003003 // If our superclass overflowed, we don't stand a chance.
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003004 if (reference_offsets == CLASS_WALK_SUPER) {
3005 klass->SetReferenceInstanceOffsets(reference_offsets);
Brian Carlstrom4873d462011-08-21 15:23:39 -07003006 return;
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003007 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003008 }
Brian Carlstrom3320cf42011-10-04 14:58:28 -07003009 CreateReferenceOffsets(klass, false, reference_offsets);
Brian Carlstrom4873d462011-08-21 15:23:39 -07003010}
3011
Brian Carlstrom40381fb2011-10-19 14:13:40 -07003012void ClassLinker::CreateReferenceStaticOffsets(SirtRef<Class>& klass) {
Brian Carlstrom3320cf42011-10-04 14:58:28 -07003013 CreateReferenceOffsets(klass, true, 0);
Brian Carlstrom4873d462011-08-21 15:23:39 -07003014}
3015
Brian Carlstrom40381fb2011-10-19 14:13:40 -07003016void ClassLinker::CreateReferenceOffsets(SirtRef<Class>& klass, bool is_static,
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003017 uint32_t reference_offsets) {
3018 size_t num_reference_fields =
Brian Carlstrom3320cf42011-10-04 14:58:28 -07003019 is_static ? klass->NumReferenceStaticFieldsDuringLinking()
3020 : klass->NumReferenceInstanceFieldsDuringLinking();
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003021 const ObjectArray<Field>* fields =
Brian Carlstrom3320cf42011-10-04 14:58:28 -07003022 is_static ? klass->GetSFields() : klass->GetIFields();
Brian Carlstrom4873d462011-08-21 15:23:39 -07003023 // All of the fields that contain object references are guaranteed
3024 // to be at the beginning of the fields list.
3025 for (size_t i = 0; i < num_reference_fields; ++i) {
3026 // Note that byte_offset is the offset from the beginning of
3027 // object, not the offset into instance data
3028 const Field* field = fields->Get(i);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003029 MemberOffset byte_offset = field->GetOffsetDuringLinking();
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003030 CHECK_EQ(byte_offset.Uint32Value() & (CLASS_OFFSET_ALIGNMENT - 1), 0U);
3031 if (CLASS_CAN_ENCODE_OFFSET(byte_offset.Uint32Value())) {
3032 uint32_t new_bit = CLASS_BIT_FROM_OFFSET(byte_offset.Uint32Value());
Brian Carlstrom4873d462011-08-21 15:23:39 -07003033 CHECK_NE(new_bit, 0U);
3034 reference_offsets |= new_bit;
3035 } else {
3036 reference_offsets = CLASS_WALK_SUPER;
3037 break;
3038 }
3039 }
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003040 // Update fields in klass
Brian Carlstrom3320cf42011-10-04 14:58:28 -07003041 if (is_static) {
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003042 klass->SetReferenceStaticOffsets(reference_offsets);
Brian Carlstrom3320cf42011-10-04 14:58:28 -07003043 } else {
3044 klass->SetReferenceInstanceOffsets(reference_offsets);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003045 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003046}
3047
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003048String* ClassLinker::ResolveString(const DexFile& dex_file,
Elliott Hughescf4c6c42011-09-01 15:16:42 -07003049 uint32_t string_idx, DexCache* dex_cache) {
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003050 String* resolved = dex_cache->GetResolvedString(string_idx);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003051 if (resolved != NULL) {
3052 return resolved;
3053 }
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07003054 const DexFile::StringId& string_id = dex_file.GetStringId(string_idx);
3055 int32_t utf16_length = dex_file.GetStringLength(string_id);
3056 const char* utf8_data = dex_file.GetStringData(string_id);
Brian Carlstrom928bf022011-10-11 02:48:14 -07003057 String* string = intern_table_->InternStrong(utf16_length, utf8_data);
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07003058 dex_cache->SetResolvedString(string_idx, string);
3059 return string;
3060}
3061
3062Class* ClassLinker::ResolveType(const DexFile& dex_file,
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08003063 uint16_t type_idx,
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07003064 DexCache* dex_cache,
3065 const ClassLoader* class_loader) {
3066 Class* resolved = dex_cache->GetResolvedType(type_idx);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003067 if (resolved == NULL) {
Ian Rogers0571d352011-11-03 19:51:38 -07003068 const char* descriptor = dex_file.StringByTypeIdx(type_idx);
Brian Carlstromaded5f72011-10-07 17:15:04 -07003069 resolved = FindClass(descriptor, class_loader);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003070 if (resolved != NULL) {
Jesse Wilson254db0f2011-11-16 16:44:11 -05003071 // TODO: we used to throw here if resolved's class loader was not the
3072 // boot class loader. This was to permit different classes with the
3073 // same name to be loaded simultaneously by different loaders
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003074 dex_cache->SetResolvedType(type_idx, resolved);
3075 } else {
Ian Rogerscab01012012-01-10 17:35:46 -08003076 CHECK(Thread::Current()->IsExceptionPending())
3077 << "Expected pending exception for failed resolution of: " << descriptor;
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003078 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003079 }
3080 return resolved;
3081}
3082
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07003083Method* ClassLinker::ResolveMethod(const DexFile& dex_file,
3084 uint32_t method_idx,
3085 DexCache* dex_cache,
3086 const ClassLoader* class_loader,
Brian Carlstrom20cfffa2011-08-26 02:31:27 -07003087 bool is_direct) {
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07003088 Method* resolved = dex_cache->GetResolvedMethod(method_idx);
3089 if (resolved != NULL) {
3090 return resolved;
3091 }
3092 const DexFile::MethodId& method_id = dex_file.GetMethodId(method_idx);
3093 Class* klass = ResolveType(dex_file, method_id.class_idx_, dex_cache, class_loader);
3094 if (klass == NULL) {
Elliott Hughescc5f9a92011-09-28 19:17:29 -07003095 DCHECK(Thread::Current()->IsExceptionPending());
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07003096 return NULL;
3097 }
3098
Ian Rogers0571d352011-11-03 19:51:38 -07003099 const char* name = dex_file.StringDataByIdx(method_id.name_idx_);
3100 std::string signature(dex_file.CreateMethodSignature(method_id.proto_idx_, NULL));
Brian Carlstrom7540ff42011-09-04 16:38:46 -07003101 if (is_direct) {
Brian Carlstrom20cfffa2011-08-26 02:31:27 -07003102 resolved = klass->FindDirectMethod(name, signature);
Brian Carlstrom7540ff42011-09-04 16:38:46 -07003103 } else if (klass->IsInterface()) {
3104 resolved = klass->FindInterfaceMethod(name, signature);
Brian Carlstrom20cfffa2011-08-26 02:31:27 -07003105 } else {
3106 resolved = klass->FindVirtualMethod(name, signature);
3107 }
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07003108 if (resolved != NULL) {
3109 dex_cache->SetResolvedMethod(method_idx, resolved);
3110 } else {
Ian Rogers9f1ab122011-12-12 08:52:43 -08003111 ThrowNoSuchMethodError(is_direct, klass, name, signature);
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07003112 }
3113 return resolved;
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003114}
3115
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07003116Field* ClassLinker::ResolveField(const DexFile& dex_file,
3117 uint32_t field_idx,
3118 DexCache* dex_cache,
3119 const ClassLoader* class_loader,
3120 bool is_static) {
3121 Field* resolved = dex_cache->GetResolvedField(field_idx);
3122 if (resolved != NULL) {
3123 return resolved;
3124 }
3125 const DexFile::FieldId& field_id = dex_file.GetFieldId(field_idx);
3126 Class* klass = ResolveType(dex_file, field_id.class_idx_, dex_cache, class_loader);
3127 if (klass == NULL) {
Ian Rogers9f1ab122011-12-12 08:52:43 -08003128 DCHECK(Thread::Current()->IsExceptionPending());
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07003129 return NULL;
3130 }
3131
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07003132 const char* name = dex_file.GetFieldName(field_id);
3133 const char* type = dex_file.GetFieldTypeDescriptor(field_id);
Brian Carlstrom20cfffa2011-08-26 02:31:27 -07003134 if (is_static) {
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07003135 resolved = klass->FindStaticField(name, type);
Brian Carlstrom20cfffa2011-08-26 02:31:27 -07003136 } else {
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07003137 resolved = klass->FindInstanceField(name, type);
Brian Carlstrom20cfffa2011-08-26 02:31:27 -07003138 }
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07003139 if (resolved != NULL) {
Elliott Hughes4a2b4172011-09-20 17:08:25 -07003140 dex_cache->SetResolvedField(field_idx, resolved);
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07003141 } else {
Ian Rogersb067ac22011-12-13 18:05:09 -08003142 ThrowNoSuchFieldError(is_static ? "static " : "instance ", klass, type, name);
3143 }
3144 return resolved;
3145}
3146
3147Field* ClassLinker::ResolveFieldJLS(const DexFile& dex_file,
3148 uint32_t field_idx,
3149 DexCache* dex_cache,
3150 const ClassLoader* class_loader) {
3151 Field* resolved = dex_cache->GetResolvedField(field_idx);
3152 if (resolved != NULL) {
3153 return resolved;
3154 }
3155 const DexFile::FieldId& field_id = dex_file.GetFieldId(field_idx);
3156 Class* klass = ResolveType(dex_file, field_id.class_idx_, dex_cache, class_loader);
3157 if (klass == NULL) {
3158 DCHECK(Thread::Current()->IsExceptionPending());
3159 return NULL;
3160 }
3161
3162 const char* name = dex_file.GetFieldName(field_id);
3163 const char* type = dex_file.GetFieldTypeDescriptor(field_id);
3164 resolved = klass->FindField(name, type);
3165 if (resolved != NULL) {
3166 dex_cache->SetResolvedField(field_idx, resolved);
3167 } else {
3168 ThrowNoSuchFieldError("", klass, type, name);
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07003169 }
3170 return resolved;
Carl Shapiro5fafe2b2011-07-09 15:34:41 -07003171}
3172
Ian Rogersad25ac52011-10-04 19:13:33 -07003173const char* ClassLinker::MethodShorty(uint32_t method_idx, Method* referrer) {
3174 Class* declaring_class = referrer->GetDeclaringClass();
3175 DexCache* dex_cache = declaring_class->GetDexCache();
3176 const DexFile& dex_file = FindDexFile(dex_cache);
3177 const DexFile::MethodId& method_id = dex_file.GetMethodId(method_idx);
3178 return dex_file.GetShorty(method_id.proto_idx_);
3179}
3180
Elliott Hughes9d5ccec2011-09-19 13:19:50 -07003181void ClassLinker::DumpAllClasses(int flags) const {
3182 // TODO: at the time this was written, it wasn't safe to call PrettyField with the ClassLinker
3183 // lock held, because it might need to resolve a field's type, which would try to take the lock.
3184 std::vector<Class*> all_classes;
3185 {
Brian Carlstrom47d237a2011-10-18 15:08:33 -07003186 MutexLock mu(classes_lock_);
Elliott Hughes9d5ccec2011-09-19 13:19:50 -07003187 typedef Table::const_iterator It; // TODO: C++0x auto
3188 for (It it = classes_.begin(), end = classes_.end(); it != end; ++it) {
3189 all_classes.push_back(it->second);
3190 }
Ian Rogers5d76c432011-10-31 21:42:49 -07003191 for (It it = image_classes_.begin(), end = image_classes_.end(); it != end; ++it) {
3192 all_classes.push_back(it->second);
3193 }
Elliott Hughes9d5ccec2011-09-19 13:19:50 -07003194 }
3195
3196 for (size_t i = 0; i < all_classes.size(); ++i) {
3197 all_classes[i]->DumpClass(std::cerr, flags);
3198 }
3199}
3200
Elliott Hughescac6cc72011-11-03 20:31:21 -07003201void ClassLinker::DumpForSigQuit(std::ostream& os) const {
3202 MutexLock mu(classes_lock_);
3203 os << "Loaded classes: " << image_classes_.size() << " image classes; "
3204 << classes_.size() << " allocated classes\n";
3205}
3206
Elliott Hughese27955c2011-08-26 15:21:24 -07003207size_t ClassLinker::NumLoadedClasses() const {
Brian Carlstrom47d237a2011-10-18 15:08:33 -07003208 MutexLock mu(classes_lock_);
Ian Rogers5d76c432011-10-31 21:42:49 -07003209 return classes_.size() + image_classes_.size();
Elliott Hughese27955c2011-08-26 15:21:24 -07003210}
3211
Brian Carlstrom47d237a2011-10-18 15:08:33 -07003212pid_t ClassLinker::GetClassesLockOwner() {
3213 return classes_lock_.GetOwner();
3214}
3215
3216pid_t ClassLinker::GetDexLockOwner() {
3217 return dex_lock_.GetOwner();
Brian Carlstrom24a3c2e2011-10-17 18:07:52 -07003218}
3219
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08003220void ClassLinker::SetClassRoot(ClassRoot class_root, Class* klass) {
3221 DCHECK(!init_done_);
3222
3223 DCHECK(klass != NULL);
3224 DCHECK(klass->GetClassLoader() == NULL);
3225
3226 DCHECK(class_roots_ != NULL);
3227 DCHECK(class_roots_->Get(class_root) == NULL);
3228 class_roots_->Set(class_root, klass);
3229}
3230
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003231} // namespace art