1 /*
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 "oat_file.h"
18
19 #include <dlfcn.h>
20 #include <sstream>
21 #include <string.h>
22 #include <unistd.h>
23
24 #include "base/bit_vector.h"
25 #include "base/stl_util.h"
26 #include "base/unix_file/fd_file.h"
27 #include "elf_file.h"
28 #include "elf_utils.h"
29 #include "oat.h"
30 #include "mirror/art_method.h"
31 #include "mirror/art_method-inl.h"
32 #include "mirror/class.h"
33 #include "mirror/object-inl.h"
34 #include "os.h"
35 #include "runtime.h"
36 #include "utils.h"
37 #include "vmap_table.h"
38
39 namespace art {
40
CheckLocation(const std::string & location)41 void OatFile::CheckLocation(const std::string& location) {
42 CHECK(!location.empty());
43 }
44
OpenWithElfFile(ElfFile * elf_file,const std::string & location,std::string * error_msg)45 OatFile* OatFile::OpenWithElfFile(ElfFile* elf_file,
46 const std::string& location,
47 std::string* error_msg) {
48 std::unique_ptr<OatFile> oat_file(new OatFile(location, false));
49 oat_file->elf_file_.reset(elf_file);
50 Elf32_Shdr* hdr = elf_file->FindSectionByName(".rodata");
51 oat_file->begin_ = elf_file->Begin() + hdr->sh_offset;
52 oat_file->end_ = elf_file->Begin() + hdr->sh_size + hdr->sh_offset;
53 return oat_file->Setup(error_msg) ? oat_file.release() : nullptr;
54 }
55
OpenMemory(std::vector<uint8_t> & oat_contents,const std::string & location,std::string * error_msg)56 OatFile* OatFile::OpenMemory(std::vector<uint8_t>& oat_contents,
57 const std::string& location,
58 std::string* error_msg) {
59 CHECK(!oat_contents.empty()) << location;
60 CheckLocation(location);
61 std::unique_ptr<OatFile> oat_file(new OatFile(location, false));
62 oat_file->begin_ = &oat_contents[0];
63 oat_file->end_ = &oat_contents[oat_contents.size()];
64 return oat_file->Setup(error_msg) ? oat_file.release() : nullptr;
65 }
66
Open(const std::string & filename,const std::string & location,byte * requested_base,uint8_t * oat_file_begin,bool executable,std::string * error_msg)67 OatFile* OatFile::Open(const std::string& filename,
68 const std::string& location,
69 byte* requested_base,
70 uint8_t* oat_file_begin,
71 bool executable,
72 std::string* error_msg) {
73 CHECK(!filename.empty()) << location;
74 CheckLocation(location);
75 std::unique_ptr<OatFile> ret;
76 if (kUsePortableCompiler && executable) {
77 // If we are using PORTABLE, use dlopen to deal with relocations.
78 //
79 // We use our own ELF loader for Quick to deal with legacy apps that
80 // open a generated dex file by name, remove the file, then open
81 // another generated dex file with the same name. http://b/10614658
82 ret.reset(OpenDlopen(filename, location, requested_base, error_msg));
83 } else {
84 // If we aren't trying to execute, we just use our own ElfFile loader for a couple reasons:
85 //
86 // On target, dlopen may fail when compiling due to selinux restrictions on installd.
87 //
88 // On host, dlopen is expected to fail when cross compiling, so fall back to OpenElfFile.
89 // This won't work for portable runtime execution because it doesn't process relocations.
90 std::unique_ptr<File> file(OS::OpenFileForReading(filename.c_str()));
91 if (file.get() == NULL) {
92 *error_msg = StringPrintf("Failed to open oat filename for reading: %s", strerror(errno));
93 return nullptr;
94 }
95 ret.reset(OpenElfFile(file.get(), location, requested_base, oat_file_begin, false, executable,
96 error_msg));
97
98 // It would be nice to unlink here. But we might have opened the file created by the
99 // ScopedLock, which we better not delete to avoid races. TODO: Investigate how to fix the API
100 // to allow removal when we know the ELF must be borked.
101 }
102 return ret.release();
103 }
104
OpenWritable(File * file,const std::string & location,std::string * error_msg)105 OatFile* OatFile::OpenWritable(File* file, const std::string& location, std::string* error_msg) {
106 CheckLocation(location);
107 return OpenElfFile(file, location, nullptr, nullptr, true, false, error_msg);
108 }
109
OpenReadable(File * file,const std::string & location,std::string * error_msg)110 OatFile* OatFile::OpenReadable(File* file, const std::string& location, std::string* error_msg) {
111 CheckLocation(location);
112 return OpenElfFile(file, location, nullptr, nullptr, false, false, error_msg);
113 }
114
OpenDlopen(const std::string & elf_filename,const std::string & location,byte * requested_base,std::string * error_msg)115 OatFile* OatFile::OpenDlopen(const std::string& elf_filename,
116 const std::string& location,
117 byte* requested_base,
118 std::string* error_msg) {
119 std::unique_ptr<OatFile> oat_file(new OatFile(location, true));
120 bool success = oat_file->Dlopen(elf_filename, requested_base, error_msg);
121 if (!success) {
122 return nullptr;
123 }
124 return oat_file.release();
125 }
126
OpenElfFile(File * file,const std::string & location,byte * requested_base,uint8_t * oat_file_begin,bool writable,bool executable,std::string * error_msg)127 OatFile* OatFile::OpenElfFile(File* file,
128 const std::string& location,
129 byte* requested_base,
130 uint8_t* oat_file_begin,
131 bool writable,
132 bool executable,
133 std::string* error_msg) {
134 std::unique_ptr<OatFile> oat_file(new OatFile(location, executable));
135 bool success = oat_file->ElfFileOpen(file, requested_base, oat_file_begin, writable, executable,
136 error_msg);
137 if (!success) {
138 CHECK(!error_msg->empty());
139 return nullptr;
140 }
141 return oat_file.release();
142 }
143
OatFile(const std::string & location,bool is_executable)144 OatFile::OatFile(const std::string& location, bool is_executable)
145 : location_(location), begin_(NULL), end_(NULL), is_executable_(is_executable),
146 dlopen_handle_(NULL),
147 secondary_lookup_lock_("OatFile secondary lookup lock", kOatFileSecondaryLookupLock) {
148 CHECK(!location_.empty());
149 }
150
~OatFile()151 OatFile::~OatFile() {
152 STLDeleteElements(&oat_dex_files_storage_);
153 if (dlopen_handle_ != NULL) {
154 dlclose(dlopen_handle_);
155 }
156 }
157
Dlopen(const std::string & elf_filename,byte * requested_base,std::string * error_msg)158 bool OatFile::Dlopen(const std::string& elf_filename, byte* requested_base,
159 std::string* error_msg) {
160 char* absolute_path = realpath(elf_filename.c_str(), NULL);
161 if (absolute_path == NULL) {
162 *error_msg = StringPrintf("Failed to find absolute path for '%s'", elf_filename.c_str());
163 return false;
164 }
165 dlopen_handle_ = dlopen(absolute_path, RTLD_NOW);
166 free(absolute_path);
167 if (dlopen_handle_ == NULL) {
168 *error_msg = StringPrintf("Failed to dlopen '%s': %s", elf_filename.c_str(), dlerror());
169 return false;
170 }
171 begin_ = reinterpret_cast<byte*>(dlsym(dlopen_handle_, "oatdata"));
172 if (begin_ == NULL) {
173 *error_msg = StringPrintf("Failed to find oatdata symbol in '%s': %s", elf_filename.c_str(),
174 dlerror());
175 return false;
176 }
177 if (requested_base != NULL && begin_ != requested_base) {
178 *error_msg = StringPrintf("Failed to find oatdata symbol at expected address: "
179 "oatdata=%p != expected=%p /proc/self/maps:\n",
180 begin_, requested_base);
181 ReadFileToString("/proc/self/maps", error_msg);
182 return false;
183 }
184 end_ = reinterpret_cast<byte*>(dlsym(dlopen_handle_, "oatlastword"));
185 if (end_ == NULL) {
186 *error_msg = StringPrintf("Failed to find oatlastword symbol in '%s': %s", elf_filename.c_str(),
187 dlerror());
188 return false;
189 }
190 // Readjust to be non-inclusive upper bound.
191 end_ += sizeof(uint32_t);
192 return Setup(error_msg);
193 }
194
ElfFileOpen(File * file,byte * requested_base,uint8_t * oat_file_begin,bool writable,bool executable,std::string * error_msg)195 bool OatFile::ElfFileOpen(File* file, byte* requested_base, uint8_t* oat_file_begin,
196 bool writable, bool executable,
197 std::string* error_msg) {
198 // TODO: rename requested_base to oat_data_begin
199 elf_file_.reset(ElfFile::Open(file, writable, /*program_header_only*/true, error_msg,
200 oat_file_begin));
201 if (elf_file_.get() == nullptr) {
202 DCHECK(!error_msg->empty());
203 return false;
204 }
205 bool loaded = elf_file_->Load(executable, error_msg);
206 if (!loaded) {
207 DCHECK(!error_msg->empty());
208 return false;
209 }
210 begin_ = elf_file_->FindDynamicSymbolAddress("oatdata");
211 if (begin_ == NULL) {
212 *error_msg = StringPrintf("Failed to find oatdata symbol in '%s'", file->GetPath().c_str());
213 return false;
214 }
215 if (requested_base != NULL && begin_ != requested_base) {
216 *error_msg = StringPrintf("Failed to find oatdata symbol at expected address: "
217 "oatdata=%p != expected=%p /proc/self/maps:\n",
218 begin_, requested_base);
219 ReadFileToString("/proc/self/maps", error_msg);
220 return false;
221 }
222 end_ = elf_file_->FindDynamicSymbolAddress("oatlastword");
223 if (end_ == NULL) {
224 *error_msg = StringPrintf("Failed to find oatlastword symbol in '%s'", file->GetPath().c_str());
225 return false;
226 }
227 // Readjust to be non-inclusive upper bound.
228 end_ += sizeof(uint32_t);
229 return Setup(error_msg);
230 }
231
Setup(std::string * error_msg)232 bool OatFile::Setup(std::string* error_msg) {
233 if (!GetOatHeader().IsValid()) {
234 *error_msg = StringPrintf("Invalid oat magic for '%s'", GetLocation().c_str());
235 return false;
236 }
237 const byte* oat = Begin();
238 oat += sizeof(OatHeader);
239 if (oat > End()) {
240 *error_msg = StringPrintf("In oat file '%s' found truncated OatHeader", GetLocation().c_str());
241 return false;
242 }
243
244 oat += GetOatHeader().GetKeyValueStoreSize();
245 if (oat > End()) {
246 *error_msg = StringPrintf("In oat file '%s' found truncated variable-size data: "
247 "%p + %zd + %ud <= %p", GetLocation().c_str(),
248 Begin(), sizeof(OatHeader), GetOatHeader().GetKeyValueStoreSize(),
249 End());
250 return false;
251 }
252
253 uint32_t dex_file_count = GetOatHeader().GetDexFileCount();
254 oat_dex_files_storage_.reserve(dex_file_count);
255 for (size_t i = 0; i < dex_file_count; i++) {
256 uint32_t dex_file_location_size = *reinterpret_cast<const uint32_t*>(oat);
257 if (UNLIKELY(dex_file_location_size == 0U)) {
258 *error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zd with empty location name",
259 GetLocation().c_str(), i);
260 return false;
261 }
262 oat += sizeof(dex_file_location_size);
263 if (UNLIKELY(oat > End())) {
264 *error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zd truncated after dex file "
265 "location size", GetLocation().c_str(), i);
266 return false;
267 }
268
269 const char* dex_file_location_data = reinterpret_cast<const char*>(oat);
270 oat += dex_file_location_size;
271 if (UNLIKELY(oat > End())) {
272 *error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zd with truncated dex file "
273 "location", GetLocation().c_str(), i);
274 return false;
275 }
276
277 std::string dex_file_location(dex_file_location_data, dex_file_location_size);
278
279 uint32_t dex_file_checksum = *reinterpret_cast<const uint32_t*>(oat);
280 oat += sizeof(dex_file_checksum);
281 if (UNLIKELY(oat > End())) {
282 *error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zd for '%s' truncated after "
283 "dex file checksum", GetLocation().c_str(), i,
284 dex_file_location.c_str());
285 return false;
286 }
287
288 uint32_t dex_file_offset = *reinterpret_cast<const uint32_t*>(oat);
289 if (UNLIKELY(dex_file_offset == 0U)) {
290 *error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zd for '%s' with zero dex "
291 "file offset", GetLocation().c_str(), i, dex_file_location.c_str());
292 return false;
293 }
294 if (UNLIKELY(dex_file_offset > Size())) {
295 *error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zd for '%s' with dex file "
296 "offset %ud > %zd", GetLocation().c_str(), i,
297 dex_file_location.c_str(), dex_file_offset, Size());
298 return false;
299 }
300 oat += sizeof(dex_file_offset);
301 if (UNLIKELY(oat > End())) {
302 *error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zd for '%s' truncated "
303 " after dex file offsets", GetLocation().c_str(), i,
304 dex_file_location.c_str());
305 return false;
306 }
307
308 const uint8_t* dex_file_pointer = Begin() + dex_file_offset;
309 if (UNLIKELY(!DexFile::IsMagicValid(dex_file_pointer))) {
310 *error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zd for '%s' with invalid "
311 " dex file magic '%s'", GetLocation().c_str(), i,
312 dex_file_location.c_str(), dex_file_pointer);
313 return false;
314 }
315 if (UNLIKELY(!DexFile::IsVersionValid(dex_file_pointer))) {
316 *error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zd for '%s' with invalid "
317 " dex file version '%s'", GetLocation().c_str(), i,
318 dex_file_location.c_str(), dex_file_pointer);
319 return false;
320 }
321 const DexFile::Header* header = reinterpret_cast<const DexFile::Header*>(dex_file_pointer);
322 const uint32_t* methods_offsets_pointer = reinterpret_cast<const uint32_t*>(oat);
323
324 oat += (sizeof(*methods_offsets_pointer) * header->class_defs_size_);
325 if (UNLIKELY(oat > End())) {
326 *error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zd for '%s' with truncated "
327 " method offsets", GetLocation().c_str(), i,
328 dex_file_location.c_str());
329 return false;
330 }
331
332 std::string canonical_location = DexFile::GetDexCanonicalLocation(dex_file_location.c_str());
333
334 // Create the OatDexFile and add it to the owning container.
335 OatDexFile* oat_dex_file = new OatDexFile(this,
336 dex_file_location,
337 canonical_location,
338 dex_file_checksum,
339 dex_file_pointer,
340 methods_offsets_pointer);
341 oat_dex_files_storage_.push_back(oat_dex_file);
342
343 // Add the location and canonical location (if different) to the oat_dex_files_ table.
344 StringPiece key(oat_dex_file->GetDexFileLocation());
345 oat_dex_files_.Put(key, oat_dex_file);
346 if (canonical_location != dex_file_location) {
347 StringPiece canonical_key(oat_dex_file->GetCanonicalDexFileLocation());
348 oat_dex_files_.Put(canonical_key, oat_dex_file);
349 }
350 }
351 return true;
352 }
353
GetOatHeader() const354 const OatHeader& OatFile::GetOatHeader() const {
355 return *reinterpret_cast<const OatHeader*>(Begin());
356 }
357
Begin() const358 const byte* OatFile::Begin() const {
359 CHECK(begin_ != NULL);
360 return begin_;
361 }
362
End() const363 const byte* OatFile::End() const {
364 CHECK(end_ != NULL);
365 return end_;
366 }
367
GetOatDexFile(const char * dex_location,const uint32_t * dex_location_checksum,bool warn_if_not_found) const368 const OatFile::OatDexFile* OatFile::GetOatDexFile(const char* dex_location,
369 const uint32_t* dex_location_checksum,
370 bool warn_if_not_found) const {
371 // NOTE: We assume here that the canonical location for a given dex_location never
372 // changes. If it does (i.e. some symlink used by the filename changes) we may return
373 // an incorrect OatDexFile. As long as we have a checksum to check, we shall return
374 // an identical file or fail; otherwise we may see some unpredictable failures.
375
376 // TODO: Additional analysis of usage patterns to see if this can be simplified
377 // without any performance loss, for example by not doing the first lock-free lookup.
378
379 const OatFile::OatDexFile* oat_dex_file = nullptr;
380 StringPiece key(dex_location);
381 // Try to find the key cheaply in the oat_dex_files_ map which holds dex locations
382 // directly mentioned in the oat file and doesn't require locking.
383 auto primary_it = oat_dex_files_.find(key);
384 if (primary_it != oat_dex_files_.end()) {
385 oat_dex_file = primary_it->second;
386 DCHECK(oat_dex_file != nullptr);
387 } else {
388 // This dex_location is not one of the dex locations directly mentioned in the
389 // oat file. The correct lookup is via the canonical location but first see in
390 // the secondary_oat_dex_files_ whether we've looked up this location before.
391 MutexLock mu(Thread::Current(), secondary_lookup_lock_);
392 auto secondary_lb = secondary_oat_dex_files_.lower_bound(key);
393 if (secondary_lb != secondary_oat_dex_files_.end() && key == secondary_lb->first) {
394 oat_dex_file = secondary_lb->second; // May be nullptr.
395 } else {
396 // We haven't seen this dex_location before, we must check the canonical location.
397 std::string dex_canonical_location = DexFile::GetDexCanonicalLocation(dex_location);
398 if (dex_canonical_location != dex_location) {
399 StringPiece canonical_key(dex_canonical_location);
400 auto canonical_it = oat_dex_files_.find(canonical_key);
401 if (canonical_it != oat_dex_files_.end()) {
402 oat_dex_file = canonical_it->second;
403 } // else keep nullptr.
404 } // else keep nullptr.
405
406 // Copy the key to the string_cache_ and store the result in secondary map.
407 string_cache_.emplace_back(key.data(), key.length());
408 StringPiece key_copy(string_cache_.back());
409 secondary_oat_dex_files_.PutBefore(secondary_lb, key_copy, oat_dex_file);
410 }
411 }
412 if (oat_dex_file != nullptr &&
413 (dex_location_checksum == nullptr ||
414 oat_dex_file->GetDexFileLocationChecksum() == *dex_location_checksum)) {
415 return oat_dex_file;
416 }
417
418 if (warn_if_not_found) {
419 std::string dex_canonical_location = DexFile::GetDexCanonicalLocation(dex_location);
420 std::string checksum("<unspecified>");
421 if (dex_location_checksum != NULL) {
422 checksum = StringPrintf("0x%08x", *dex_location_checksum);
423 }
424 LOG(WARNING) << "Failed to find OatDexFile for DexFile " << dex_location
425 << " ( canonical path " << dex_canonical_location << ")"
426 << " with checksum " << checksum << " in OatFile " << GetLocation();
427 if (kIsDebugBuild) {
428 for (const OatDexFile* odf : oat_dex_files_storage_) {
429 LOG(WARNING) << "OatFile " << GetLocation()
430 << " contains OatDexFile " << odf->GetDexFileLocation()
431 << " (canonical path " << odf->GetCanonicalDexFileLocation() << ")"
432 << " with checksum 0x" << std::hex << odf->GetDexFileLocationChecksum();
433 }
434 }
435 }
436
437 return NULL;
438 }
439
OatDexFile(const OatFile * oat_file,const std::string & dex_file_location,const std::string & canonical_dex_file_location,uint32_t dex_file_location_checksum,const byte * dex_file_pointer,const uint32_t * oat_class_offsets_pointer)440 OatFile::OatDexFile::OatDexFile(const OatFile* oat_file,
441 const std::string& dex_file_location,
442 const std::string& canonical_dex_file_location,
443 uint32_t dex_file_location_checksum,
444 const byte* dex_file_pointer,
445 const uint32_t* oat_class_offsets_pointer)
446 : oat_file_(oat_file),
447 dex_file_location_(dex_file_location),
448 canonical_dex_file_location_(canonical_dex_file_location),
449 dex_file_location_checksum_(dex_file_location_checksum),
450 dex_file_pointer_(dex_file_pointer),
451 oat_class_offsets_pointer_(oat_class_offsets_pointer) {}
452
~OatDexFile()453 OatFile::OatDexFile::~OatDexFile() {}
454
FileSize() const455 size_t OatFile::OatDexFile::FileSize() const {
456 return reinterpret_cast<const DexFile::Header*>(dex_file_pointer_)->file_size_;
457 }
458
OpenDexFile(std::string * error_msg) const459 const DexFile* OatFile::OatDexFile::OpenDexFile(std::string* error_msg) const {
460 return DexFile::Open(dex_file_pointer_, FileSize(), dex_file_location_,
461 dex_file_location_checksum_, GetOatFile(), error_msg);
462 }
463
GetOatClassOffset(uint16_t class_def_index) const464 uint32_t OatFile::OatDexFile::GetOatClassOffset(uint16_t class_def_index) const {
465 return oat_class_offsets_pointer_[class_def_index];
466 }
467
GetOatClass(uint16_t class_def_index) const468 OatFile::OatClass OatFile::OatDexFile::GetOatClass(uint16_t class_def_index) const {
469 uint32_t oat_class_offset = GetOatClassOffset(class_def_index);
470
471 const byte* oat_class_pointer = oat_file_->Begin() + oat_class_offset;
472 CHECK_LT(oat_class_pointer, oat_file_->End()) << oat_file_->GetLocation();
473
474 const byte* status_pointer = oat_class_pointer;
475 CHECK_LT(status_pointer, oat_file_->End()) << oat_file_->GetLocation();
476 mirror::Class::Status status =
477 static_cast<mirror::Class::Status>(*reinterpret_cast<const int16_t*>(status_pointer));
478 CHECK_LT(status, mirror::Class::kStatusMax);
479
480 const byte* type_pointer = status_pointer + sizeof(uint16_t);
481 CHECK_LT(type_pointer, oat_file_->End()) << oat_file_->GetLocation();
482 OatClassType type = static_cast<OatClassType>(*reinterpret_cast<const uint16_t*>(type_pointer));
483 CHECK_LT(type, kOatClassMax);
484
485 const byte* after_type_pointer = type_pointer + sizeof(int16_t);
486 CHECK_LE(after_type_pointer, oat_file_->End()) << oat_file_->GetLocation();
487
488 uint32_t bitmap_size = 0;
489 const byte* bitmap_pointer = nullptr;
490 const byte* methods_pointer = nullptr;
491 if (type == kOatClassSomeCompiled) {
492 bitmap_size = static_cast<uint32_t>(*reinterpret_cast<const uint32_t*>(after_type_pointer));
493 bitmap_pointer = after_type_pointer + sizeof(bitmap_size);
494 CHECK_LE(bitmap_pointer, oat_file_->End()) << oat_file_->GetLocation();
495 methods_pointer = bitmap_pointer + bitmap_size;
496 } else {
497 methods_pointer = after_type_pointer;
498 }
499 CHECK_LE(methods_pointer, oat_file_->End()) << oat_file_->GetLocation();
500
501 return OatClass(oat_file_,
502 status,
503 type,
504 bitmap_size,
505 reinterpret_cast<const uint32_t*>(bitmap_pointer),
506 reinterpret_cast<const OatMethodOffsets*>(methods_pointer));
507 }
508
OatClass(const OatFile * oat_file,mirror::Class::Status status,OatClassType type,uint32_t bitmap_size,const uint32_t * bitmap_pointer,const OatMethodOffsets * methods_pointer)509 OatFile::OatClass::OatClass(const OatFile* oat_file,
510 mirror::Class::Status status,
511 OatClassType type,
512 uint32_t bitmap_size,
513 const uint32_t* bitmap_pointer,
514 const OatMethodOffsets* methods_pointer)
515 : oat_file_(oat_file), status_(status), type_(type),
516 bitmap_(bitmap_pointer), methods_pointer_(methods_pointer) {
517 CHECK(methods_pointer != nullptr);
518 switch (type_) {
519 case kOatClassAllCompiled: {
520 CHECK_EQ(0U, bitmap_size);
521 CHECK(bitmap_pointer == nullptr);
522 break;
523 }
524 case kOatClassSomeCompiled: {
525 CHECK_NE(0U, bitmap_size);
526 CHECK(bitmap_pointer != nullptr);
527 break;
528 }
529 case kOatClassNoneCompiled: {
530 CHECK_EQ(0U, bitmap_size);
531 CHECK(bitmap_pointer == nullptr);
532 methods_pointer_ = nullptr;
533 break;
534 }
535 case kOatClassMax: {
536 LOG(FATAL) << "Invalid OatClassType " << type_;
537 break;
538 }
539 }
540 }
541
GetOatMethodOffsetsOffset(uint32_t method_index) const542 uint32_t OatFile::OatClass::GetOatMethodOffsetsOffset(uint32_t method_index) const {
543 const OatMethodOffsets* oat_method_offsets = GetOatMethodOffsets(method_index);
544 if (oat_method_offsets == nullptr) {
545 return 0u;
546 }
547 return reinterpret_cast<const uint8_t*>(oat_method_offsets) - oat_file_->Begin();
548 }
549
GetOatMethodOffsets(uint32_t method_index) const550 const OatMethodOffsets* OatFile::OatClass::GetOatMethodOffsets(uint32_t method_index) const {
551 // NOTE: We don't keep the number of methods and cannot do a bounds check for method_index.
552 if (methods_pointer_ == nullptr) {
553 CHECK_EQ(kOatClassNoneCompiled, type_);
554 return nullptr;
555 }
556 size_t methods_pointer_index;
557 if (bitmap_ == nullptr) {
558 CHECK_EQ(kOatClassAllCompiled, type_);
559 methods_pointer_index = method_index;
560 } else {
561 CHECK_EQ(kOatClassSomeCompiled, type_);
562 if (!BitVector::IsBitSet(bitmap_, method_index)) {
563 return nullptr;
564 }
565 size_t num_set_bits = BitVector::NumSetBits(bitmap_, method_index);
566 methods_pointer_index = num_set_bits;
567 }
568 const OatMethodOffsets& oat_method_offsets = methods_pointer_[methods_pointer_index];
569 return &oat_method_offsets;
570 }
571
GetOatMethod(uint32_t method_index) const572 const OatFile::OatMethod OatFile::OatClass::GetOatMethod(uint32_t method_index) const {
573 const OatMethodOffsets* oat_method_offsets = GetOatMethodOffsets(method_index);
574 if (oat_method_offsets == nullptr) {
575 return OatMethod(nullptr, 0);
576 }
577 if (oat_file_->IsExecutable() ||
578 Runtime::Current() == nullptr || // This case applies for oatdump.
579 Runtime::Current()->IsCompiler()) {
580 return OatMethod(oat_file_->Begin(), oat_method_offsets->code_offset_);
581 } else {
582 // We aren't allowed to use the compiled code. We just force it down the interpreted version.
583 return OatMethod(oat_file_->Begin(), 0);
584 }
585 }
586
OatMethod(const byte * base,const uint32_t code_offset)587 OatFile::OatMethod::OatMethod(const byte* base,
588 const uint32_t code_offset)
589 : begin_(base),
590 code_offset_(code_offset) {
591 }
592
~OatMethod()593 OatFile::OatMethod::~OatMethod() {}
594
LinkMethod(mirror::ArtMethod * method) const595 void OatFile::OatMethod::LinkMethod(mirror::ArtMethod* method) const {
596 CHECK(method != NULL);
597 #if defined(ART_USE_PORTABLE_COMPILER)
598 method->SetEntryPointFromPortableCompiledCode(GetPortableCode());
599 #endif
600 method->SetEntryPointFromQuickCompiledCode(GetQuickCode());
601 }
602
IsPic() const603 bool OatFile::IsPic() const {
604 return GetOatHeader().IsPic();
605 // TODO: Check against oat_patches. b/18144996
606 }
607
608 } // namespace art
609