blob: 90e2c65c898dce25f6890586e25a4ed3a653a42a [file] [log] [blame]
Brian Carlstrom7940e442013-07-12 13:46:57 -07001/*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include "image_writer.h"
18
19#include <sys/stat.h>
20
21#include <vector>
22
23#include "base/logging.h"
24#include "base/unix_file/fd_file.h"
25#include "class_linker.h"
26#include "compiled_method.h"
27#include "dex_file-inl.h"
28#include "driver/compiler_driver.h"
29#include "elf_writer.h"
30#include "gc/accounting/card_table-inl.h"
31#include "gc/accounting/heap_bitmap.h"
Mathieu Chartier31e89252013-08-28 11:29:12 -070032#include "gc/accounting/space_bitmap-inl.h"
Brian Carlstrom7940e442013-07-12 13:46:57 -070033#include "gc/heap.h"
34#include "gc/space/large_object_space.h"
35#include "gc/space/space-inl.h"
36#include "globals.h"
37#include "image.h"
38#include "intern_table.h"
Mathieu Chartierad2541a2013-10-25 10:05:23 -070039#include "lock_word.h"
Brian Carlstromea46f952013-07-30 01:26:50 -070040#include "mirror/art_field-inl.h"
41#include "mirror/art_method-inl.h"
Brian Carlstrom7940e442013-07-12 13:46:57 -070042#include "mirror/array-inl.h"
43#include "mirror/class-inl.h"
44#include "mirror/class_loader.h"
45#include "mirror/dex_cache-inl.h"
Brian Carlstrom7940e442013-07-12 13:46:57 -070046#include "mirror/object-inl.h"
47#include "mirror/object_array-inl.h"
48#include "oat.h"
49#include "oat_file.h"
50#include "object_utils.h"
51#include "runtime.h"
52#include "scoped_thread_state_change.h"
53#include "sirt_ref.h"
54#include "UniquePtr.h"
55#include "utils.h"
56
Brian Carlstromea46f952013-07-30 01:26:50 -070057using ::art::mirror::ArtField;
58using ::art::mirror::ArtMethod;
Brian Carlstrom3e3d5912013-07-18 00:19:45 -070059using ::art::mirror::Class;
60using ::art::mirror::DexCache;
61using ::art::mirror::EntryPointFromInterpreter;
Brian Carlstrom3e3d5912013-07-18 00:19:45 -070062using ::art::mirror::Object;
63using ::art::mirror::ObjectArray;
64using ::art::mirror::String;
Brian Carlstrom7940e442013-07-12 13:46:57 -070065
66namespace art {
67
68bool ImageWriter::Write(const std::string& image_filename,
69 uintptr_t image_begin,
70 const std::string& oat_filename,
71 const std::string& oat_location) {
72 CHECK(!image_filename.empty());
73
74 CHECK_NE(image_begin, 0U);
75 image_begin_ = reinterpret_cast<byte*>(image_begin);
76
77 ClassLinker* class_linker = Runtime::Current()->GetClassLinker();
Brian Carlstrom7940e442013-07-12 13:46:57 -070078
Brian Carlstrom7571e8b2013-08-12 17:04:14 -070079 UniquePtr<File> oat_file(OS::OpenFileReadWrite(oat_filename.c_str()));
Brian Carlstrom7940e442013-07-12 13:46:57 -070080 if (oat_file.get() == NULL) {
81 LOG(ERROR) << "Failed to open oat file " << oat_filename << " for " << oat_location;
82 return false;
83 }
Ian Rogers8d31bbd2013-10-13 10:44:14 -070084 std::string error_msg;
85 oat_file_ = OatFile::OpenWritable(oat_file.get(), oat_location, &error_msg);
86 if (oat_file_ == nullptr) {
87 LOG(ERROR) << "Failed to open writable oat file " << oat_filename << " for " << oat_location
88 << ": " << error_msg;
Brian Carlstromc50d8e12013-07-23 22:35:16 -070089 return false;
90 }
Ian Rogers8d31bbd2013-10-13 10:44:14 -070091 CHECK_EQ(class_linker->RegisterOatFile(oat_file_), oat_file_);
Brian Carlstrom7940e442013-07-12 13:46:57 -070092
Ian Rogers848871b2013-08-05 10:56:33 -070093 interpreter_to_interpreter_bridge_offset_ =
94 oat_file_->GetOatHeader().GetInterpreterToInterpreterBridgeOffset();
95 interpreter_to_compiled_code_bridge_offset_ =
96 oat_file_->GetOatHeader().GetInterpreterToCompiledCodeBridgeOffset();
97
98 jni_dlsym_lookup_offset_ = oat_file_->GetOatHeader().GetJniDlsymLookupOffset();
99
Jeff Hao88474b42013-10-23 16:24:40 -0700100 portable_imt_conflict_trampoline_offset_ =
101 oat_file_->GetOatHeader().GetPortableImtConflictTrampolineOffset();
Ian Rogers848871b2013-08-05 10:56:33 -0700102 portable_resolution_trampoline_offset_ =
103 oat_file_->GetOatHeader().GetPortableResolutionTrampolineOffset();
104 portable_to_interpreter_bridge_offset_ =
105 oat_file_->GetOatHeader().GetPortableToInterpreterBridgeOffset();
106
Jeff Hao88474b42013-10-23 16:24:40 -0700107 quick_imt_conflict_trampoline_offset_ =
108 oat_file_->GetOatHeader().GetQuickImtConflictTrampolineOffset();
Ian Rogers848871b2013-08-05 10:56:33 -0700109 quick_resolution_trampoline_offset_ =
110 oat_file_->GetOatHeader().GetQuickResolutionTrampolineOffset();
111 quick_to_interpreter_bridge_offset_ =
112 oat_file_->GetOatHeader().GetQuickToInterpreterBridgeOffset();
Brian Carlstrom7940e442013-07-12 13:46:57 -0700113 {
114 Thread::Current()->TransitionFromSuspendedToRunnable();
115 PruneNonImageClasses(); // Remove junk
116 ComputeLazyFieldsForImageClasses(); // Add useful information
117 ComputeEagerResolvedStrings();
118 Thread::Current()->TransitionFromRunnableToSuspended(kNative);
119 }
120 gc::Heap* heap = Runtime::Current()->GetHeap();
121 heap->CollectGarbage(false); // Remove garbage.
Brian Carlstrom7940e442013-07-12 13:46:57 -0700122
123 if (!AllocMemory()) {
124 return false;
125 }
Mathieu Chartier590fee92013-09-13 13:46:47 -0700126
127 if (kIsDebugBuild) {
Brian Carlstrom7940e442013-07-12 13:46:57 -0700128 ScopedObjectAccess soa(Thread::Current());
129 CheckNonImageClassesRemoved();
130 }
Mathieu Chartier590fee92013-09-13 13:46:47 -0700131
Brian Carlstrom7940e442013-07-12 13:46:57 -0700132 Thread::Current()->TransitionFromSuspendedToRunnable();
133 size_t oat_loaded_size = 0;
134 size_t oat_data_offset = 0;
135 ElfWriter::GetOatElfInformation(oat_file.get(), oat_loaded_size, oat_data_offset);
136 CalculateNewObjectOffsets(oat_loaded_size, oat_data_offset);
137 CopyAndFixupObjects();
138 PatchOatCodeAndMethods();
139 Thread::Current()->TransitionFromRunnableToSuspended(kNative);
140
Brian Carlstrom7571e8b2013-08-12 17:04:14 -0700141 UniquePtr<File> image_file(OS::CreateEmptyFile(image_filename.c_str()));
Mathieu Chartier31e89252013-08-28 11:29:12 -0700142 ImageHeader* image_header = reinterpret_cast<ImageHeader*>(image_->Begin());
Brian Carlstrom7940e442013-07-12 13:46:57 -0700143 if (image_file.get() == NULL) {
144 LOG(ERROR) << "Failed to open image file " << image_filename;
145 return false;
146 }
147 if (fchmod(image_file->Fd(), 0644) != 0) {
148 PLOG(ERROR) << "Failed to make image file world readable: " << image_filename;
149 return EXIT_FAILURE;
150 }
Mathieu Chartier31e89252013-08-28 11:29:12 -0700151
152 // Write out the image.
153 CHECK_EQ(image_end_, image_header->GetImageSize());
154 if (!image_file->WriteFully(image_->Begin(), image_end_)) {
Brian Carlstrom7940e442013-07-12 13:46:57 -0700155 PLOG(ERROR) << "Failed to write image file " << image_filename;
156 return false;
157 }
Mathieu Chartier31e89252013-08-28 11:29:12 -0700158
159 // Write out the image bitmap at the page aligned start of the image end.
160 CHECK_ALIGNED(image_header->GetImageBitmapOffset(), kPageSize);
161 if (!image_file->Write(reinterpret_cast<char*>(image_bitmap_->Begin()),
162 image_header->GetImageBitmapSize(),
163 image_header->GetImageBitmapOffset())) {
164 PLOG(ERROR) << "Failed to write image file " << image_filename;
165 return false;
166 }
167
Brian Carlstrom7940e442013-07-12 13:46:57 -0700168 return true;
169}
170
Mathieu Chartier590fee92013-09-13 13:46:47 -0700171void ImageWriter::SetImageOffset(mirror::Object* object, size_t offset) {
172 DCHECK(object != nullptr);
173 DCHECK_NE(offset, 0U);
174 DCHECK(!IsImageOffsetAssigned(object));
175 mirror::Object* obj = reinterpret_cast<mirror::Object*>(image_->Begin() + offset);
176 DCHECK_ALIGNED(obj, kObjectAlignment);
177 image_bitmap_->Set(obj);
178 // Before we stomp over the lock word, save the hash code for later.
179 Monitor::Deflate(Thread::Current(), object);;
180 LockWord lw(object->GetLockWord());
181 switch (lw.GetState()) {
182 case LockWord::kFatLocked: {
183 LOG(FATAL) << "Fat locked object " << obj << " found during object copy";
184 break;
185 }
186 case LockWord::kThinLocked: {
187 LOG(FATAL) << "Thin locked object " << obj << " found during object copy";
188 break;
189 }
190 case LockWord::kUnlocked:
191 // No hash, don't need to save it.
192 break;
193 case LockWord::kHashCode:
194 saved_hashes_.push_back(std::make_pair(obj, lw.GetHashCode()));
195 break;
196 default:
197 LOG(FATAL) << "Unreachable.";
198 break;
Mathieu Chartier31e89252013-08-28 11:29:12 -0700199 }
Mathieu Chartier590fee92013-09-13 13:46:47 -0700200 object->SetLockWord(LockWord::FromForwardingAddress(offset));
201 DCHECK(IsImageOffsetAssigned(object));
202}
203
204void ImageWriter::AssignImageOffset(mirror::Object* object) {
205 DCHECK(object != nullptr);
206 SetImageOffset(object, image_end_);
207 image_end_ += RoundUp(object->SizeOf(), 8); // 64-bit alignment
208 DCHECK_LT(image_end_, image_->Size());
209}
210
211bool ImageWriter::IsImageOffsetAssigned(const mirror::Object* object) const {
212 DCHECK(object != nullptr);
213 return object->GetLockWord().GetState() == LockWord::kForwardingAddress;
214}
215
216size_t ImageWriter::GetImageOffset(const mirror::Object* object) const {
217 DCHECK(object != nullptr);
218 DCHECK(IsImageOffsetAssigned(object));
219 LockWord lock_word = object->GetLockWord();
220 size_t offset = lock_word.ForwardingAddress();
221 DCHECK_LT(offset, image_end_);
222 return offset;
Mathieu Chartier31e89252013-08-28 11:29:12 -0700223}
224
Brian Carlstrom7940e442013-07-12 13:46:57 -0700225bool ImageWriter::AllocMemory() {
Mathieu Chartier590fee92013-09-13 13:46:47 -0700226 size_t length = RoundUp(Runtime::Current()->GetHeap()->GetTotalMemory(), kPageSize);
Ian Rogers8d31bbd2013-10-13 10:44:14 -0700227 std::string error_msg;
Mathieu Chartier590fee92013-09-13 13:46:47 -0700228 image_.reset(MemMap::MapAnonymous("image writer image", NULL, length, PROT_READ | PROT_WRITE,
229 &error_msg));
Ian Rogers8d31bbd2013-10-13 10:44:14 -0700230 if (UNLIKELY(image_.get() == nullptr)) {
231 LOG(ERROR) << "Failed to allocate memory for image file generation: " << error_msg;
Brian Carlstrom7940e442013-07-12 13:46:57 -0700232 return false;
233 }
Mathieu Chartier590fee92013-09-13 13:46:47 -0700234
235 // Create the image bitmap.
236 image_bitmap_.reset(gc::accounting::SpaceBitmap::Create("image bitmap", image_->Begin(),
237 length));
238 if (image_bitmap_.get() == nullptr) {
239 LOG(ERROR) << "Failed to allocate memory for image bitmap";
240 return false;
241 }
Brian Carlstrom7940e442013-07-12 13:46:57 -0700242 return true;
243}
244
245void ImageWriter::ComputeLazyFieldsForImageClasses() {
Mathieu Chartier590fee92013-09-13 13:46:47 -0700246 ClassLinker* class_linker = Runtime::Current()->GetClassLinker();
Brian Carlstrom7940e442013-07-12 13:46:57 -0700247 class_linker->VisitClassesWithoutClassesLock(ComputeLazyFieldsForClassesVisitor, NULL);
248}
249
250bool ImageWriter::ComputeLazyFieldsForClassesVisitor(Class* c, void* /*arg*/) {
251 c->ComputeName();
252 return true;
253}
254
255void ImageWriter::ComputeEagerResolvedStringsCallback(Object* obj, void* arg) {
256 if (!obj->GetClass()->IsStringClass()) {
257 return;
258 }
Mathieu Chartier590fee92013-09-13 13:46:47 -0700259 mirror::String* string = obj->AsString();
Brian Carlstrom7940e442013-07-12 13:46:57 -0700260 const uint16_t* utf16_string = string->GetCharArray()->GetData() + string->GetOffset();
Mathieu Chartier590fee92013-09-13 13:46:47 -0700261 for (DexCache* dex_cache : Runtime::Current()->GetClassLinker()->GetDexCaches()) {
Brian Carlstrom7940e442013-07-12 13:46:57 -0700262 const DexFile& dex_file = *dex_cache->GetDexFile();
Ian Rogers24c534d2013-11-14 00:15:00 -0800263 const DexFile::StringId* string_id;
264 if (UNLIKELY(string->GetLength() == 0)) {
265 string_id = dex_file.FindStringId("");
266 } else {
267 string_id = dex_file.FindStringId(utf16_string);
268 }
Mathieu Chartier590fee92013-09-13 13:46:47 -0700269 if (string_id != nullptr) {
Brian Carlstrom7940e442013-07-12 13:46:57 -0700270 // This string occurs in this dex file, assign the dex cache entry.
271 uint32_t string_idx = dex_file.GetIndexForStringId(*string_id);
272 if (dex_cache->GetResolvedString(string_idx) == NULL) {
273 dex_cache->SetResolvedString(string_idx, string);
274 }
275 }
276 }
277}
278
Mathieu Chartier590fee92013-09-13 13:46:47 -0700279void ImageWriter::ComputeEagerResolvedStrings() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
280 ReaderMutexLock mu(Thread::Current(), *Locks::heap_bitmap_lock_);
281 Runtime::Current()->GetHeap()->VisitObjects(ComputeEagerResolvedStringsCallback, this);
Brian Carlstrom7940e442013-07-12 13:46:57 -0700282}
283
284bool ImageWriter::IsImageClass(const Class* klass) {
Ian Rogersdfb325e2013-10-30 01:00:44 -0700285 return compiler_driver_.IsImageClass(ClassHelper(klass).GetDescriptor());
Brian Carlstrom7940e442013-07-12 13:46:57 -0700286}
287
288struct NonImageClasses {
289 ImageWriter* image_writer;
290 std::set<std::string>* non_image_classes;
291};
292
293void ImageWriter::PruneNonImageClasses() {
294 if (compiler_driver_.GetImageClasses() == NULL) {
295 return;
296 }
297 Runtime* runtime = Runtime::Current();
298 ClassLinker* class_linker = runtime->GetClassLinker();
299
300 // Make a list of classes we would like to prune.
301 std::set<std::string> non_image_classes;
302 NonImageClasses context;
303 context.image_writer = this;
304 context.non_image_classes = &non_image_classes;
305 class_linker->VisitClasses(NonImageClassesVisitor, &context);
306
307 // Remove the undesired classes from the class roots.
Mathieu Chartier02e25112013-08-14 16:14:24 -0700308 for (const std::string& it : non_image_classes) {
309 class_linker->RemoveClass(it.c_str(), NULL);
Brian Carlstrom7940e442013-07-12 13:46:57 -0700310 }
311
312 // Clear references to removed classes from the DexCaches.
Brian Carlstromea46f952013-07-30 01:26:50 -0700313 ArtMethod* resolution_method = runtime->GetResolutionMethod();
Mathieu Chartier590fee92013-09-13 13:46:47 -0700314 for (DexCache* dex_cache : class_linker->GetDexCaches()) {
Brian Carlstrom7940e442013-07-12 13:46:57 -0700315 for (size_t i = 0; i < dex_cache->NumResolvedTypes(); i++) {
316 Class* klass = dex_cache->GetResolvedType(i);
317 if (klass != NULL && !IsImageClass(klass)) {
318 dex_cache->SetResolvedType(i, NULL);
319 dex_cache->GetInitializedStaticStorage()->Set(i, NULL);
320 }
321 }
322 for (size_t i = 0; i < dex_cache->NumResolvedMethods(); i++) {
Brian Carlstromea46f952013-07-30 01:26:50 -0700323 ArtMethod* method = dex_cache->GetResolvedMethod(i);
Brian Carlstrom7940e442013-07-12 13:46:57 -0700324 if (method != NULL && !IsImageClass(method->GetDeclaringClass())) {
325 dex_cache->SetResolvedMethod(i, resolution_method);
326 }
327 }
328 for (size_t i = 0; i < dex_cache->NumResolvedFields(); i++) {
Brian Carlstromea46f952013-07-30 01:26:50 -0700329 ArtField* field = dex_cache->GetResolvedField(i);
Brian Carlstrom7940e442013-07-12 13:46:57 -0700330 if (field != NULL && !IsImageClass(field->GetDeclaringClass())) {
331 dex_cache->SetResolvedField(i, NULL);
332 }
333 }
334 }
335}
336
337bool ImageWriter::NonImageClassesVisitor(Class* klass, void* arg) {
338 NonImageClasses* context = reinterpret_cast<NonImageClasses*>(arg);
339 if (!context->image_writer->IsImageClass(klass)) {
Ian Rogersdfb325e2013-10-30 01:00:44 -0700340 context->non_image_classes->insert(ClassHelper(klass).GetDescriptor());
Brian Carlstrom7940e442013-07-12 13:46:57 -0700341 }
342 return true;
343}
344
345void ImageWriter::CheckNonImageClassesRemoved()
346 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
Mathieu Chartier590fee92013-09-13 13:46:47 -0700347 if (compiler_driver_.GetImageClasses() != nullptr) {
348 gc::Heap* heap = Runtime::Current()->GetHeap();
349 ReaderMutexLock mu(Thread::Current(), *Locks::heap_bitmap_lock_);
350 heap->VisitObjects(CheckNonImageClassesRemovedCallback, this);
Brian Carlstrom7940e442013-07-12 13:46:57 -0700351 }
Brian Carlstrom7940e442013-07-12 13:46:57 -0700352}
353
354void ImageWriter::CheckNonImageClassesRemovedCallback(Object* obj, void* arg) {
355 ImageWriter* image_writer = reinterpret_cast<ImageWriter*>(arg);
Mathieu Chartier590fee92013-09-13 13:46:47 -0700356 if (obj->IsClass()) {
357 Class* klass = obj->AsClass();
358 if (!image_writer->IsImageClass(klass)) {
359 image_writer->DumpImageClasses();
360 CHECK(image_writer->IsImageClass(klass)) << ClassHelper(klass).GetDescriptor()
361 << " " << PrettyDescriptor(klass);
362 }
Brian Carlstrom7940e442013-07-12 13:46:57 -0700363 }
364}
365
366void ImageWriter::DumpImageClasses() {
367 CompilerDriver::DescriptorSet* image_classes = compiler_driver_.GetImageClasses();
368 CHECK(image_classes != NULL);
Mathieu Chartier02e25112013-08-14 16:14:24 -0700369 for (const std::string& image_class : *image_classes) {
370 LOG(INFO) << " " << image_class;
Brian Carlstrom7940e442013-07-12 13:46:57 -0700371 }
372}
373
Mathieu Chartier590fee92013-09-13 13:46:47 -0700374void ImageWriter::CalculateObjectOffsets(Object* obj) {
Brian Carlstrom7940e442013-07-12 13:46:57 -0700375 DCHECK(obj != NULL);
Brian Carlstrom7940e442013-07-12 13:46:57 -0700376 // if it is a string, we want to intern it if its not interned.
377 if (obj->GetClass()->IsStringClass()) {
378 // we must be an interned string that was forward referenced and already assigned
Mathieu Chartier590fee92013-09-13 13:46:47 -0700379 if (IsImageOffsetAssigned(obj)) {
Brian Carlstrom7940e442013-07-12 13:46:57 -0700380 DCHECK_EQ(obj, obj->AsString()->Intern());
381 return;
382 }
Mathieu Chartier590fee92013-09-13 13:46:47 -0700383 Thread* self = Thread::Current();
384 SirtRef<Object> sirt_obj(self, obj);
385 mirror::String* interned = obj->AsString()->Intern();
386 if (sirt_obj.get() != interned) {
387 if (!IsImageOffsetAssigned(interned)) {
Brian Carlstrom7940e442013-07-12 13:46:57 -0700388 // interned obj is after us, allocate its location early
Mathieu Chartier590fee92013-09-13 13:46:47 -0700389 AssignImageOffset(interned);
Brian Carlstrom7940e442013-07-12 13:46:57 -0700390 }
391 // point those looking for this object to the interned version.
Mathieu Chartier590fee92013-09-13 13:46:47 -0700392 SetImageOffset(sirt_obj.get(), GetImageOffset(interned));
Brian Carlstrom7940e442013-07-12 13:46:57 -0700393 return;
394 }
395 // else (obj == interned), nothing to do but fall through to the normal case
396 }
397
Mathieu Chartier590fee92013-09-13 13:46:47 -0700398 AssignImageOffset(obj);
Brian Carlstrom7940e442013-07-12 13:46:57 -0700399}
400
401ObjectArray<Object>* ImageWriter::CreateImageRoots() const {
402 Runtime* runtime = Runtime::Current();
403 ClassLinker* class_linker = runtime->GetClassLinker();
Brian Carlstrom7940e442013-07-12 13:46:57 -0700404 Thread* self = Thread::Current();
Mathieu Chartier590fee92013-09-13 13:46:47 -0700405 SirtRef<Class> object_array_class(self, class_linker->FindSystemClass("[Ljava/lang/Object;"));
Brian Carlstrom7940e442013-07-12 13:46:57 -0700406
407 // build an Object[] of all the DexCaches used in the source_space_
Mathieu Chartier590fee92013-09-13 13:46:47 -0700408 ObjectArray<Object>* dex_caches = ObjectArray<Object>::Alloc(self, object_array_class.get(),
409 class_linker->GetDexCaches().size());
Brian Carlstrom7940e442013-07-12 13:46:57 -0700410 int i = 0;
Mathieu Chartier590fee92013-09-13 13:46:47 -0700411 for (DexCache* dex_cache : class_linker->GetDexCaches()) {
Mathieu Chartier02e25112013-08-14 16:14:24 -0700412 dex_caches->Set(i++, dex_cache);
Brian Carlstrom7940e442013-07-12 13:46:57 -0700413 }
414
415 // build an Object[] of the roots needed to restore the runtime
Mathieu Chartier590fee92013-09-13 13:46:47 -0700416 SirtRef<ObjectArray<Object> > image_roots(
417 self, ObjectArray<Object>::Alloc(self, object_array_class.get(), ImageHeader::kImageRootsMax));
Brian Carlstrom7940e442013-07-12 13:46:57 -0700418 image_roots->Set(ImageHeader::kResolutionMethod, runtime->GetResolutionMethod());
Jeff Hao88474b42013-10-23 16:24:40 -0700419 image_roots->Set(ImageHeader::kImtConflictMethod, runtime->GetImtConflictMethod());
420 image_roots->Set(ImageHeader::kDefaultImt, runtime->GetDefaultImt());
Brian Carlstrom7940e442013-07-12 13:46:57 -0700421 image_roots->Set(ImageHeader::kCalleeSaveMethod,
422 runtime->GetCalleeSaveMethod(Runtime::kSaveAll));
423 image_roots->Set(ImageHeader::kRefsOnlySaveMethod,
424 runtime->GetCalleeSaveMethod(Runtime::kRefsOnly));
425 image_roots->Set(ImageHeader::kRefsAndArgsSaveMethod,
426 runtime->GetCalleeSaveMethod(Runtime::kRefsAndArgs));
427 image_roots->Set(ImageHeader::kOatLocation,
428 String::AllocFromModifiedUtf8(self, oat_file_->GetLocation().c_str()));
Mathieu Chartier590fee92013-09-13 13:46:47 -0700429 image_roots->Set(ImageHeader::kDexCaches, dex_caches);
430 image_roots->Set(ImageHeader::kClassRoots, class_linker->GetClassRoots());
Brian Carlstrom7940e442013-07-12 13:46:57 -0700431 for (int i = 0; i < ImageHeader::kImageRootsMax; i++) {
432 CHECK(image_roots->Get(i) != NULL);
433 }
434 return image_roots.get();
435}
436
Mathieu Chartier590fee92013-09-13 13:46:47 -0700437// Walk instance fields of the given Class. Separate function to allow recursion on the super
438// class.
439void ImageWriter::WalkInstanceFields(mirror::Object* obj, mirror::Class* klass) {
440 // Visit fields of parent classes first.
441 SirtRef<mirror::Class> sirt_class(Thread::Current(), klass);
442 mirror::Class* super = sirt_class->GetSuperClass();
443 if (super != nullptr) {
444 WalkInstanceFields(obj, super);
445 }
446 //
447 size_t num_reference_fields = sirt_class->NumReferenceInstanceFields();
448 for (size_t i = 0; i < num_reference_fields; ++i) {
449 mirror::ArtField* field = sirt_class->GetInstanceField(i);
450 MemberOffset field_offset = field->GetOffset();
451 mirror::Object* value = obj->GetFieldObject<mirror::Object*>(field_offset, false);
452 if (value != nullptr) {
453 WalkFieldsInOrder(value);
454 }
455 }
456}
457
458// For an unvisited object, visit it then all its children found via fields.
459void ImageWriter::WalkFieldsInOrder(mirror::Object* obj) {
460 if (!IsImageOffsetAssigned(obj)) {
461 // Walk instance fields of all objects
462 Thread* self = Thread::Current();
463 SirtRef<mirror::Object> sirt_obj(self, obj);
464 SirtRef<mirror::Class> klass(self, obj->GetClass());
465 // visit the object itself.
466 CalculateObjectOffsets(sirt_obj.get());
467 WalkInstanceFields(sirt_obj.get(), klass.get());
468 // Walk static fields of a Class.
469 if (sirt_obj->IsClass()) {
470 size_t num_static_fields = klass->NumReferenceStaticFields();
471 for (size_t i = 0; i < num_static_fields; ++i) {
472 mirror::ArtField* field = klass->GetStaticField(i);
473 MemberOffset field_offset = field->GetOffset();
474 mirror::Object* value = sirt_obj->GetFieldObject<mirror::Object*>(field_offset, false);
475 if (value != nullptr) {
476 WalkFieldsInOrder(value);
477 }
478 }
479 } else if (sirt_obj->IsObjectArray()) {
480 // Walk elements of an object array.
481 int32_t length = sirt_obj->AsObjectArray<mirror::Object>()->GetLength();
482 for (int32_t i = 0; i < length; i++) {
483 mirror::ObjectArray<mirror::Object>* obj_array = sirt_obj->AsObjectArray<mirror::Object>();
484 mirror::Object* value = obj_array->Get(i);
485 if (value != nullptr) {
486 WalkFieldsInOrder(value);
487 }
488 }
489 }
490 }
491}
492
493void ImageWriter::WalkFieldsCallback(mirror::Object* obj, void* arg) {
494 ImageWriter* writer = reinterpret_cast<ImageWriter*>(arg);
495 DCHECK(writer != nullptr);
496 writer->WalkFieldsInOrder(obj);
497}
498
Brian Carlstrom7940e442013-07-12 13:46:57 -0700499void ImageWriter::CalculateNewObjectOffsets(size_t oat_loaded_size, size_t oat_data_offset) {
500 CHECK_NE(0U, oat_loaded_size);
501 Thread* self = Thread::Current();
502 SirtRef<ObjectArray<Object> > image_roots(self, CreateImageRoots());
503
504 gc::Heap* heap = Runtime::Current()->GetHeap();
Brian Carlstrom7940e442013-07-12 13:46:57 -0700505 DCHECK_EQ(0U, image_end_);
506
Mathieu Chartier31e89252013-08-28 11:29:12 -0700507 // Leave space for the header, but do not write it yet, we need to
Brian Carlstrom7940e442013-07-12 13:46:57 -0700508 // know where image_roots is going to end up
Brian Carlstrom7934ac22013-07-26 10:54:15 -0700509 image_end_ += RoundUp(sizeof(ImageHeader), 8); // 64-bit-alignment
Brian Carlstrom7940e442013-07-12 13:46:57 -0700510
511 {
512 WriterMutexLock mu(self, *Locks::heap_bitmap_lock_);
Brian Carlstrom7940e442013-07-12 13:46:57 -0700513 // TODO: Image spaces only?
Brian Carlstrom7940e442013-07-12 13:46:57 -0700514 const char* old = self->StartAssertNoThreadSuspension("ImageWriter");
Mathieu Chartier590fee92013-09-13 13:46:47 -0700515 DCHECK_LT(image_end_, image_->Size());
516 // Clear any pre-existing monitors which may have been in the monitor words.
517 heap->VisitObjects(WalkFieldsCallback, this);
Brian Carlstrom7940e442013-07-12 13:46:57 -0700518 self->EndAssertNoThreadSuspension(old);
519 }
520
521 const byte* oat_file_begin = image_begin_ + RoundUp(image_end_, kPageSize);
522 const byte* oat_file_end = oat_file_begin + oat_loaded_size;
523 oat_data_begin_ = oat_file_begin + oat_data_offset;
524 const byte* oat_data_end = oat_data_begin_ + oat_file_->Size();
525
Mathieu Chartier31e89252013-08-28 11:29:12 -0700526 // Return to write header at start of image with future location of image_roots. At this point,
527 // image_end_ is the size of the image (excluding bitmaps).
Mathieu Chartier50482232013-11-21 11:48:14 -0800528 const size_t heap_bytes_per_bitmap_byte = kBitsPerByte * gc::accounting::SpaceBitmap::kAlignment;
Mathieu Chartier12aeccd2013-11-13 15:52:06 -0800529 const size_t bitmap_bytes = RoundUp(image_end_, heap_bytes_per_bitmap_byte) /
530 heap_bytes_per_bitmap_byte;
Brian Carlstrom7940e442013-07-12 13:46:57 -0700531 ImageHeader image_header(reinterpret_cast<uint32_t>(image_begin_),
Mathieu Chartier31e89252013-08-28 11:29:12 -0700532 static_cast<uint32_t>(image_end_),
533 RoundUp(image_end_, kPageSize),
Mathieu Chartier12aeccd2013-11-13 15:52:06 -0800534 RoundUp(bitmap_bytes, kPageSize),
Brian Carlstrom7940e442013-07-12 13:46:57 -0700535 reinterpret_cast<uint32_t>(GetImageAddress(image_roots.get())),
536 oat_file_->GetOatHeader().GetChecksum(),
537 reinterpret_cast<uint32_t>(oat_file_begin),
538 reinterpret_cast<uint32_t>(oat_data_begin_),
539 reinterpret_cast<uint32_t>(oat_data_end),
540 reinterpret_cast<uint32_t>(oat_file_end));
541 memcpy(image_->Begin(), &image_header, sizeof(image_header));
542
543 // Note that image_end_ is left at end of used space
544}
545
546void ImageWriter::CopyAndFixupObjects()
547 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
548 Thread* self = Thread::Current();
549 const char* old_cause = self->StartAssertNoThreadSuspension("ImageWriter");
550 gc::Heap* heap = Runtime::Current()->GetHeap();
551 // TODO: heap validation can't handle this fix up pass
552 heap->DisableObjectValidation();
553 // TODO: Image spaces only?
554 WriterMutexLock mu(self, *Locks::heap_bitmap_lock_);
Mathieu Chartier590fee92013-09-13 13:46:47 -0700555 heap->VisitObjects(CopyAndFixupObjectsCallback, this);
556 // Fix up the object previously had hash codes.
557 for (const std::pair<mirror::Object*, uint32_t>& hash_pair : saved_hashes_) {
558 hash_pair.first->SetLockWord(LockWord::FromHashCode(hash_pair.second));
559 }
560 saved_hashes_.clear();
Brian Carlstrom7940e442013-07-12 13:46:57 -0700561 self->EndAssertNoThreadSuspension(old_cause);
562}
563
Mathieu Chartier590fee92013-09-13 13:46:47 -0700564void ImageWriter::CopyAndFixupObjectsCallback(Object* obj, void* arg) {
565 DCHECK(obj != NULL);
Brian Carlstrom7940e442013-07-12 13:46:57 -0700566 DCHECK(arg != NULL);
Brian Carlstrom7940e442013-07-12 13:46:57 -0700567 ImageWriter* image_writer = reinterpret_cast<ImageWriter*>(arg);
Brian Carlstrom7940e442013-07-12 13:46:57 -0700568 // see GetLocalAddress for similar computation
569 size_t offset = image_writer->GetImageOffset(obj);
570 byte* dst = image_writer->image_->Begin() + offset;
571 const byte* src = reinterpret_cast<const byte*>(obj);
572 size_t n = obj->SizeOf();
573 DCHECK_LT(offset + n, image_writer->image_->Size());
574 memcpy(dst, src, n);
575 Object* copy = reinterpret_cast<Object*>(dst);
Mathieu Chartierad2541a2013-10-25 10:05:23 -0700576 // Write in a hash code of objects which have inflated monitors or a hash code in their monitor
577 // word.
Mathieu Chartier590fee92013-09-13 13:46:47 -0700578 copy->SetLockWord(LockWord());
Brian Carlstrom7940e442013-07-12 13:46:57 -0700579 image_writer->FixupObject(obj, copy);
580}
581
582void ImageWriter::FixupObject(const Object* orig, Object* copy) {
583 DCHECK(orig != NULL);
584 DCHECK(copy != NULL);
585 copy->SetClass(down_cast<Class*>(GetImageAddress(orig->GetClass())));
586 // TODO: special case init of pointers to malloc data (or removal of these pointers)
587 if (orig->IsClass()) {
588 FixupClass(orig->AsClass(), down_cast<Class*>(copy));
589 } else if (orig->IsObjectArray()) {
590 FixupObjectArray(orig->AsObjectArray<Object>(), down_cast<ObjectArray<Object>*>(copy));
Brian Carlstromea46f952013-07-30 01:26:50 -0700591 } else if (orig->IsArtMethod()) {
592 FixupMethod(orig->AsArtMethod(), down_cast<ArtMethod*>(copy));
Brian Carlstrom7940e442013-07-12 13:46:57 -0700593 } else {
594 FixupInstanceFields(orig, copy);
595 }
596}
597
598void ImageWriter::FixupClass(const Class* orig, Class* copy) {
599 FixupInstanceFields(orig, copy);
600 FixupStaticFields(orig, copy);
601}
602
Brian Carlstromea46f952013-07-30 01:26:50 -0700603void ImageWriter::FixupMethod(const ArtMethod* orig, ArtMethod* copy) {
Brian Carlstrom7940e442013-07-12 13:46:57 -0700604 FixupInstanceFields(orig, copy);
605
Ian Rogers848871b2013-08-05 10:56:33 -0700606 // OatWriter replaces the code_ with an offset value. Here we re-adjust to a pointer relative to
607 // oat_begin_
Brian Carlstrom7940e442013-07-12 13:46:57 -0700608
Ian Rogers848871b2013-08-05 10:56:33 -0700609 // The resolution method has a special trampoline to call.
610 if (UNLIKELY(orig == Runtime::Current()->GetResolutionMethod())) {
Brian Carlstrom7940e442013-07-12 13:46:57 -0700611#if defined(ART_USE_PORTABLE_COMPILER)
612 copy->SetEntryPointFromCompiledCode(GetOatAddress(portable_resolution_trampoline_offset_));
613#else
614 copy->SetEntryPointFromCompiledCode(GetOatAddress(quick_resolution_trampoline_offset_));
615#endif
Jeff Hao88474b42013-10-23 16:24:40 -0700616 } else if (UNLIKELY(orig == Runtime::Current()->GetImtConflictMethod())) {
617#if defined(ART_USE_PORTABLE_COMPILER)
618 copy->SetEntryPointFromCompiledCode(GetOatAddress(portable_imt_conflict_trampoline_offset_));
619#else
620 copy->SetEntryPointFromCompiledCode(GetOatAddress(quick_imt_conflict_trampoline_offset_));
621#endif
Brian Carlstrom7940e442013-07-12 13:46:57 -0700622 } else {
Ian Rogers848871b2013-08-05 10:56:33 -0700623 // We assume all methods have code. If they don't currently then we set them to the use the
624 // resolution trampoline. Abstract methods never have code and so we need to make sure their
625 // use results in an AbstractMethodError. We use the interpreter to achieve this.
626 if (UNLIKELY(orig->IsAbstract())) {
Brian Carlstrom7940e442013-07-12 13:46:57 -0700627#if defined(ART_USE_PORTABLE_COMPILER)
Ian Rogers848871b2013-08-05 10:56:33 -0700628 copy->SetEntryPointFromCompiledCode(GetOatAddress(portable_to_interpreter_bridge_offset_));
Brian Carlstrom7940e442013-07-12 13:46:57 -0700629#else
Ian Rogers848871b2013-08-05 10:56:33 -0700630 copy->SetEntryPointFromCompiledCode(GetOatAddress(quick_to_interpreter_bridge_offset_));
Brian Carlstrom7940e442013-07-12 13:46:57 -0700631#endif
Ian Rogers848871b2013-08-05 10:56:33 -0700632 copy->SetEntryPointFromInterpreter(reinterpret_cast<EntryPointFromInterpreter*>
633 (GetOatAddress(interpreter_to_interpreter_bridge_offset_)));
634 } else {
635 copy->SetEntryPointFromInterpreter(reinterpret_cast<EntryPointFromInterpreter*>
636 (GetOatAddress(interpreter_to_compiled_code_bridge_offset_)));
637 // Use original code if it exists. Otherwise, set the code pointer to the resolution
638 // trampoline.
639 const byte* code = GetOatAddress(orig->GetOatCodeOffset());
640 if (code != NULL) {
641 copy->SetEntryPointFromCompiledCode(code);
642 } else {
643#if defined(ART_USE_PORTABLE_COMPILER)
644 copy->SetEntryPointFromCompiledCode(GetOatAddress(portable_resolution_trampoline_offset_));
645#else
646 copy->SetEntryPointFromCompiledCode(GetOatAddress(quick_resolution_trampoline_offset_));
647#endif
648 }
649 if (orig->IsNative()) {
650 // The native method's pointer is set to a stub to lookup via dlsym.
651 // Note this is not the code_ pointer, that is handled above.
652 copy->SetNativeMethod(GetOatAddress(jni_dlsym_lookup_offset_));
653 } else {
654 // Normal (non-abstract non-native) methods have various tables to relocate.
655 uint32_t mapping_table_off = orig->GetOatMappingTableOffset();
656 const byte* mapping_table = GetOatAddress(mapping_table_off);
Ian Rogers1809a722013-08-09 22:05:32 -0700657 copy->SetMappingTable(mapping_table);
Brian Carlstrom7940e442013-07-12 13:46:57 -0700658
Ian Rogers848871b2013-08-05 10:56:33 -0700659 uint32_t vmap_table_offset = orig->GetOatVmapTableOffset();
660 const byte* vmap_table = GetOatAddress(vmap_table_offset);
Ian Rogers1809a722013-08-09 22:05:32 -0700661 copy->SetVmapTable(vmap_table);
Brian Carlstrom7940e442013-07-12 13:46:57 -0700662
Ian Rogers848871b2013-08-05 10:56:33 -0700663 uint32_t native_gc_map_offset = orig->GetOatNativeGcMapOffset();
664 const byte* native_gc_map = GetOatAddress(native_gc_map_offset);
665 copy->SetNativeGcMap(reinterpret_cast<const uint8_t*>(native_gc_map));
666 }
667 }
Brian Carlstrom7940e442013-07-12 13:46:57 -0700668 }
669}
670
671void ImageWriter::FixupObjectArray(const ObjectArray<Object>* orig, ObjectArray<Object>* copy) {
672 for (int32_t i = 0; i < orig->GetLength(); ++i) {
673 const Object* element = orig->Get(i);
674 copy->SetPtrWithoutChecks(i, GetImageAddress(element));
675 }
676}
677
678void ImageWriter::FixupInstanceFields(const Object* orig, Object* copy) {
679 DCHECK(orig != NULL);
680 DCHECK(copy != NULL);
681 Class* klass = orig->GetClass();
682 DCHECK(klass != NULL);
Mathieu Chartier590fee92013-09-13 13:46:47 -0700683 FixupFields(orig, copy, klass->GetReferenceInstanceOffsets(), false);
Brian Carlstrom7940e442013-07-12 13:46:57 -0700684}
685
686void ImageWriter::FixupStaticFields(const Class* orig, Class* copy) {
687 DCHECK(orig != NULL);
688 DCHECK(copy != NULL);
Mathieu Chartier590fee92013-09-13 13:46:47 -0700689 FixupFields(orig, copy, orig->GetReferenceStaticOffsets(), true);
Brian Carlstrom7940e442013-07-12 13:46:57 -0700690}
691
692void ImageWriter::FixupFields(const Object* orig,
693 Object* copy,
694 uint32_t ref_offsets,
695 bool is_static) {
696 if (ref_offsets != CLASS_WALK_SUPER) {
697 // Found a reference offset bitmap. Fixup the specified offsets.
698 while (ref_offsets != 0) {
699 size_t right_shift = CLZ(ref_offsets);
700 MemberOffset byte_offset = CLASS_OFFSET_FROM_CLZ(right_shift);
701 const Object* ref = orig->GetFieldObject<const Object*>(byte_offset, false);
702 // Use SetFieldPtr to avoid card marking since we are writing to the image.
703 copy->SetFieldPtr(byte_offset, GetImageAddress(ref), false);
704 ref_offsets &= ~(CLASS_HIGH_BIT >> right_shift);
705 }
706 } else {
707 // There is no reference offset bitmap. In the non-static case,
708 // walk up the class inheritance hierarchy and find reference
709 // offsets the hard way. In the static case, just consider this
710 // class.
711 for (const Class *klass = is_static ? orig->AsClass() : orig->GetClass();
712 klass != NULL;
713 klass = is_static ? NULL : klass->GetSuperClass()) {
714 size_t num_reference_fields = (is_static
715 ? klass->NumReferenceStaticFields()
716 : klass->NumReferenceInstanceFields());
717 for (size_t i = 0; i < num_reference_fields; ++i) {
Brian Carlstromea46f952013-07-30 01:26:50 -0700718 ArtField* field = (is_static
719 ? klass->GetStaticField(i)
720 : klass->GetInstanceField(i));
Brian Carlstrom7940e442013-07-12 13:46:57 -0700721 MemberOffset field_offset = field->GetOffset();
722 const Object* ref = orig->GetFieldObject<const Object*>(field_offset, false);
723 // Use SetFieldPtr to avoid card marking since we are writing to the image.
724 copy->SetFieldPtr(field_offset, GetImageAddress(ref), false);
725 }
726 }
727 }
728 if (!is_static && orig->IsReferenceInstance()) {
729 // Fix-up referent, that isn't marked as an object field, for References.
Brian Carlstromea46f952013-07-30 01:26:50 -0700730 ArtField* field = orig->GetClass()->FindInstanceField("referent", "Ljava/lang/Object;");
Brian Carlstrom7940e442013-07-12 13:46:57 -0700731 MemberOffset field_offset = field->GetOffset();
732 const Object* ref = orig->GetFieldObject<const Object*>(field_offset, false);
733 // Use SetFieldPtr to avoid card marking since we are writing to the image.
734 copy->SetFieldPtr(field_offset, GetImageAddress(ref), false);
735 }
736}
737
Brian Carlstromea46f952013-07-30 01:26:50 -0700738static ArtMethod* GetTargetMethod(const CompilerDriver::PatchInformation* patch)
Brian Carlstrom7940e442013-07-12 13:46:57 -0700739 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
740 ClassLinker* class_linker = Runtime::Current()->GetClassLinker();
Mathieu Chartier590fee92013-09-13 13:46:47 -0700741 Thread* self = Thread::Current();
742 SirtRef<mirror::DexCache> dex_cache(self, class_linker->FindDexCache(patch->GetDexFile()));
743 SirtRef<mirror::ClassLoader> class_loader(self, nullptr);
Brian Carlstromea46f952013-07-30 01:26:50 -0700744 ArtMethod* method = class_linker->ResolveMethod(patch->GetDexFile(),
745 patch->GetTargetMethodIdx(),
746 dex_cache,
Mathieu Chartier590fee92013-09-13 13:46:47 -0700747 class_loader,
Brian Carlstromea46f952013-07-30 01:26:50 -0700748 NULL,
749 patch->GetTargetInvokeType());
Brian Carlstrom7940e442013-07-12 13:46:57 -0700750 CHECK(method != NULL)
751 << patch->GetDexFile().GetLocation() << " " << patch->GetTargetMethodIdx();
752 CHECK(!method->IsRuntimeMethod())
753 << patch->GetDexFile().GetLocation() << " " << patch->GetTargetMethodIdx();
754 CHECK(dex_cache->GetResolvedMethods()->Get(patch->GetTargetMethodIdx()) == method)
755 << patch->GetDexFile().GetLocation() << " " << patch->GetReferrerMethodIdx() << " "
756 << PrettyMethod(dex_cache->GetResolvedMethods()->Get(patch->GetTargetMethodIdx())) << " "
757 << PrettyMethod(method);
758 return method;
759}
760
761void ImageWriter::PatchOatCodeAndMethods() {
762 Thread* self = Thread::Current();
763 ClassLinker* class_linker = Runtime::Current()->GetClassLinker();
764 const char* old_cause = self->StartAssertNoThreadSuspension("ImageWriter");
765
766 typedef std::vector<const CompilerDriver::PatchInformation*> Patches;
767 const Patches& code_to_patch = compiler_driver_.GetCodeToPatch();
768 for (size_t i = 0; i < code_to_patch.size(); i++) {
769 const CompilerDriver::PatchInformation* patch = code_to_patch[i];
Brian Carlstromea46f952013-07-30 01:26:50 -0700770 ArtMethod* target = GetTargetMethod(patch);
Brian Carlstrom7940e442013-07-12 13:46:57 -0700771 uint32_t code = reinterpret_cast<uint32_t>(class_linker->GetOatCodeFor(target));
772 uint32_t code_base = reinterpret_cast<uint32_t>(&oat_file_->GetOatHeader());
773 uint32_t code_offset = code - code_base;
774 SetPatchLocation(patch, reinterpret_cast<uint32_t>(GetOatAddress(code_offset)));
775 }
776
777 const Patches& methods_to_patch = compiler_driver_.GetMethodsToPatch();
778 for (size_t i = 0; i < methods_to_patch.size(); i++) {
779 const CompilerDriver::PatchInformation* patch = methods_to_patch[i];
Brian Carlstromea46f952013-07-30 01:26:50 -0700780 ArtMethod* target = GetTargetMethod(patch);
Brian Carlstrom7940e442013-07-12 13:46:57 -0700781 SetPatchLocation(patch, reinterpret_cast<uint32_t>(GetImageAddress(target)));
782 }
783
784 // Update the image header with the new checksum after patching
785 ImageHeader* image_header = reinterpret_cast<ImageHeader*>(image_->Begin());
786 image_header->SetOatChecksum(oat_file_->GetOatHeader().GetChecksum());
787 self->EndAssertNoThreadSuspension(old_cause);
788}
789
790void ImageWriter::SetPatchLocation(const CompilerDriver::PatchInformation* patch, uint32_t value) {
791 ClassLinker* class_linker = Runtime::Current()->GetClassLinker();
792 const void* oat_code = class_linker->GetOatCodeFor(patch->GetDexFile(),
Ian Rogers8b2c0b92013-09-19 02:56:49 -0700793 patch->GetReferrerClassDefIdx(),
Brian Carlstrom7940e442013-07-12 13:46:57 -0700794 patch->GetReferrerMethodIdx());
795 OatHeader& oat_header = const_cast<OatHeader&>(oat_file_->GetOatHeader());
796 // TODO: make this Thumb2 specific
797 uint8_t* base = reinterpret_cast<uint8_t*>(reinterpret_cast<uint32_t>(oat_code) & ~0x1);
798 uint32_t* patch_location = reinterpret_cast<uint32_t*>(base + patch->GetLiteralOffset());
Mathieu Chartier590fee92013-09-13 13:46:47 -0700799 if (kIsDebugBuild) {
800 const DexFile::MethodId& id = patch->GetDexFile().GetMethodId(patch->GetTargetMethodIdx());
801 uint32_t expected = reinterpret_cast<uint32_t>(&id);
802 uint32_t actual = *patch_location;
803 CHECK(actual == expected || actual == value) << std::hex
804 << "actual=" << actual
805 << "expected=" << expected
806 << "value=" << value;
807 }
Brian Carlstrom7940e442013-07-12 13:46:57 -0700808 *patch_location = value;
809 oat_header.UpdateChecksum(patch_location, sizeof(value));
810}
811
812} // namespace art