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1 /*
2  * Copyright (C) 2017 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 "art_dex_file_loader.h"
18 
19 #include <sys/stat.h>
20 
21 #include "android-base/stringprintf.h"
22 
23 #include "base/file_magic.h"
24 #include "base/file_utils.h"
25 #include "base/mem_map.h"
26 #include "base/mman.h"  // For the PROT_* and MAP_* constants.
27 #include "base/stl_util.h"
28 #include "base/systrace.h"
29 #include "base/unix_file/fd_file.h"
30 #include "base/zip_archive.h"
31 #include "dex/compact_dex_file.h"
32 #include "dex/dex_file.h"
33 #include "dex/dex_file_verifier.h"
34 #include "dex/standard_dex_file.h"
35 
36 namespace art {
37 
38 namespace {
39 
40 class MemMapContainer : public DexFileContainer {
41  public:
MemMapContainer(MemMap && mem_map)42   explicit MemMapContainer(MemMap&& mem_map) : mem_map_(std::move(mem_map)) { }
~MemMapContainer()43   ~MemMapContainer() override { }
44 
GetPermissions()45   int GetPermissions() override {
46     if (!mem_map_.IsValid()) {
47       return 0;
48     } else {
49       return mem_map_.GetProtect();
50     }
51   }
52 
IsReadOnly()53   bool IsReadOnly() override {
54     return GetPermissions() == PROT_READ;
55   }
56 
EnableWrite()57   bool EnableWrite() override {
58     CHECK(IsReadOnly());
59     if (!mem_map_.IsValid()) {
60       return false;
61     } else {
62       return mem_map_.Protect(PROT_READ | PROT_WRITE);
63     }
64   }
65 
DisableWrite()66   bool DisableWrite() override {
67     CHECK(!IsReadOnly());
68     if (!mem_map_.IsValid()) {
69       return false;
70     } else {
71       return mem_map_.Protect(PROT_READ);
72     }
73   }
74 
75  private:
76   MemMap mem_map_;
77   DISALLOW_COPY_AND_ASSIGN(MemMapContainer);
78 };
79 
80 }  // namespace
81 
82 using android::base::StringPrintf;
83 
84 static constexpr OatDexFile* kNoOatDexFile = nullptr;
85 
86 
GetMultiDexChecksums(const char * filename,std::vector<uint32_t> * checksums,std::vector<std::string> * dex_locations,std::string * error_msg,int zip_fd,bool * zip_file_only_contains_uncompressed_dex) const87 bool ArtDexFileLoader::GetMultiDexChecksums(const char* filename,
88                                             std::vector<uint32_t>* checksums,
89                                             std::vector<std::string>* dex_locations,
90                                             std::string* error_msg,
91                                             int zip_fd,
92                                             bool* zip_file_only_contains_uncompressed_dex) const {
93   CHECK(checksums != nullptr);
94   uint32_t magic;
95 
96   File fd;
97   if (zip_fd != -1) {
98      if (ReadMagicAndReset(zip_fd, &magic, error_msg)) {
99        fd = File(DupCloexec(zip_fd), /* check_usage= */ false);
100      }
101   } else {
102     fd = OpenAndReadMagic(filename, &magic, error_msg);
103   }
104   if (fd.Fd() == -1) {
105     DCHECK(!error_msg->empty());
106     return false;
107   }
108   if (IsZipMagic(magic)) {
109     std::unique_ptr<ZipArchive> zip_archive(
110         ZipArchive::OpenFromFd(fd.Release(), filename, error_msg));
111     if (zip_archive.get() == nullptr) {
112       *error_msg = StringPrintf("Failed to open zip archive '%s' (error msg: %s)", filename,
113                                 error_msg->c_str());
114       return false;
115     }
116 
117     uint32_t idx = 0;
118     std::string zip_entry_name = GetMultiDexClassesDexName(idx);
119     std::unique_ptr<ZipEntry> zip_entry(zip_archive->Find(zip_entry_name.c_str(), error_msg));
120     if (zip_entry.get() == nullptr) {
121       *error_msg = StringPrintf("Zip archive '%s' doesn't contain %s (error msg: %s)", filename,
122           zip_entry_name.c_str(), error_msg->c_str());
123       return false;
124     }
125 
126     if (zip_file_only_contains_uncompressed_dex != nullptr) {
127       // Start by assuming everything is uncompressed.
128       *zip_file_only_contains_uncompressed_dex = true;
129     }
130 
131     do {
132       if (zip_file_only_contains_uncompressed_dex != nullptr) {
133         if (!(zip_entry->IsUncompressed() && zip_entry->IsAlignedTo(alignof(DexFile::Header)))) {
134           *zip_file_only_contains_uncompressed_dex = false;
135         }
136       }
137       checksums->push_back(zip_entry->GetCrc32());
138       dex_locations->push_back(GetMultiDexLocation(idx, filename));
139       zip_entry_name = GetMultiDexClassesDexName(++idx);
140       zip_entry.reset(zip_archive->Find(zip_entry_name.c_str(), error_msg));
141     } while (zip_entry.get() != nullptr);
142     return true;
143   }
144   if (IsMagicValid(magic)) {
145     std::unique_ptr<const DexFile> dex_file(OpenFile(fd.Release(),
146                                                      filename,
147                                                      /* verify= */ false,
148                                                      /* verify_checksum= */ false,
149                                                      /* mmap_shared= */ false,
150                                                      error_msg));
151     if (dex_file == nullptr) {
152       return false;
153     }
154     checksums->push_back(dex_file->GetHeader().checksum_);
155     return true;
156   }
157   *error_msg = StringPrintf("Expected valid zip or dex file: '%s'", filename);
158   return false;
159 }
160 
Open(const uint8_t * base,size_t size,const std::string & location,uint32_t location_checksum,const OatDexFile * oat_dex_file,bool verify,bool verify_checksum,std::string * error_msg,std::unique_ptr<DexFileContainer> container) const161 std::unique_ptr<const DexFile> ArtDexFileLoader::Open(
162     const uint8_t* base,
163     size_t size,
164     const std::string& location,
165     uint32_t location_checksum,
166     const OatDexFile* oat_dex_file,
167     bool verify,
168     bool verify_checksum,
169     std::string* error_msg,
170     std::unique_ptr<DexFileContainer> container) const {
171   ScopedTrace trace(std::string("Open dex file from RAM ") + location);
172   return OpenCommon(base,
173                     size,
174                     /*data_base=*/ nullptr,
175                     /*data_size=*/ 0u,
176                     location,
177                     location_checksum,
178                     oat_dex_file,
179                     verify,
180                     verify_checksum,
181                     error_msg,
182                     std::move(container),
183                     /*verify_result=*/ nullptr);
184 }
185 
Open(const std::string & location,uint32_t location_checksum,MemMap && map,bool verify,bool verify_checksum,std::string * error_msg) const186 std::unique_ptr<const DexFile> ArtDexFileLoader::Open(const std::string& location,
187                                                       uint32_t location_checksum,
188                                                       MemMap&& map,
189                                                       bool verify,
190                                                       bool verify_checksum,
191                                                       std::string* error_msg) const {
192   ScopedTrace trace(std::string("Open dex file from mapped-memory ") + location);
193   CHECK(map.IsValid());
194 
195   size_t size = map.Size();
196   if (size < sizeof(DexFile::Header)) {
197     *error_msg = StringPrintf(
198         "DexFile: failed to open dex file '%s' that is too short to have a header",
199         location.c_str());
200     return nullptr;
201   }
202 
203   uint8_t* begin = map.Begin();
204   std::unique_ptr<DexFile> dex_file = OpenCommon(begin,
205                                                  size,
206                                                  /*data_base=*/ nullptr,
207                                                  /*data_size=*/ 0u,
208                                                  location,
209                                                  location_checksum,
210                                                  kNoOatDexFile,
211                                                  verify,
212                                                  verify_checksum,
213                                                  error_msg,
214                                                  std::make_unique<MemMapContainer>(std::move(map)),
215                                                  /*verify_result=*/ nullptr);
216   // Opening CompactDex is only supported from vdex files.
217   if (dex_file != nullptr && dex_file->IsCompactDexFile()) {
218     *error_msg = StringPrintf("Opening CompactDex file '%s' is only supported from vdex files",
219                               location.c_str());
220     return nullptr;
221   }
222   return dex_file;
223 }
224 
Open(const char * filename,const std::string & location,bool verify,bool verify_checksum,std::string * error_msg,std::vector<std::unique_ptr<const DexFile>> * dex_files) const225 bool ArtDexFileLoader::Open(const char* filename,
226                             const std::string& location,
227                             bool verify,
228                             bool verify_checksum,
229                             std::string* error_msg,
230                             std::vector<std::unique_ptr<const DexFile>>* dex_files) const {
231   uint32_t magic;
232   File fd = OpenAndReadMagic(filename, &magic, error_msg);
233   if (fd.Fd() == -1) {
234     DCHECK(!error_msg->empty());
235     return false;
236   }
237   return OpenWithMagic(
238       magic, fd.Release(), location, verify, verify_checksum, error_msg, dex_files);
239 }
240 
Open(int fd,const std::string & location,bool verify,bool verify_checksum,std::string * error_msg,std::vector<std::unique_ptr<const DexFile>> * dex_files) const241 bool ArtDexFileLoader::Open(int fd,
242                             const std::string& location,
243                             bool verify,
244                             bool verify_checksum,
245                             std::string* error_msg,
246                             std::vector<std::unique_ptr<const DexFile>>* dex_files) const {
247   uint32_t magic;
248   if (!ReadMagicAndReset(fd, &magic, error_msg)) {
249     DCHECK(!error_msg->empty());
250     return false;
251   }
252   return OpenWithMagic(magic, fd, location, verify, verify_checksum, error_msg, dex_files);
253 }
254 
Open(const char * filename,int fd,const std::string & location,bool verify,bool verify_checksum,std::string * error_msg,std::vector<std::unique_ptr<const DexFile>> * dex_files) const255 bool ArtDexFileLoader::Open(const char* filename,
256                             int fd,
257                             const std::string& location,
258                             bool verify,
259                             bool verify_checksum,
260                             std::string* error_msg,
261                             std::vector<std::unique_ptr<const DexFile>>* dex_files) const {
262   return fd == -1
263       ? Open(filename, location, verify, verify_checksum, error_msg, dex_files)
264       : Open(fd, location, verify, verify_checksum, error_msg, dex_files);
265 }
266 
OpenWithMagic(uint32_t magic,int fd,const std::string & location,bool verify,bool verify_checksum,std::string * error_msg,std::vector<std::unique_ptr<const DexFile>> * dex_files) const267 bool ArtDexFileLoader::OpenWithMagic(uint32_t magic,
268                                      int fd,
269                                      const std::string& location,
270                                      bool verify,
271                                      bool verify_checksum,
272                                      std::string* error_msg,
273                                      std::vector<std::unique_ptr<const DexFile>>* dex_files) const {
274   ScopedTrace trace(std::string("Open dex file ") + std::string(location));
275   DCHECK(dex_files != nullptr) << "DexFile::Open: out-param is nullptr";
276   if (IsZipMagic(magic)) {
277     return OpenZip(fd, location, verify, verify_checksum, error_msg, dex_files);
278   }
279   if (IsMagicValid(magic)) {
280     std::unique_ptr<const DexFile> dex_file(OpenFile(fd,
281                                                      location,
282                                                      verify,
283                                                      verify_checksum,
284                                                      /* mmap_shared= */ false,
285                                                      error_msg));
286     if (dex_file.get() != nullptr) {
287       dex_files->push_back(std::move(dex_file));
288       return true;
289     } else {
290       return false;
291     }
292   }
293   *error_msg = StringPrintf("Expected valid zip or dex file: '%s'", location.c_str());
294   return false;
295 }
296 
OpenDex(int fd,const std::string & location,bool verify,bool verify_checksum,bool mmap_shared,std::string * error_msg) const297 std::unique_ptr<const DexFile> ArtDexFileLoader::OpenDex(int fd,
298                                                          const std::string& location,
299                                                          bool verify,
300                                                          bool verify_checksum,
301                                                          bool mmap_shared,
302                                                          std::string* error_msg) const {
303   ScopedTrace trace("Open dex file " + std::string(location));
304   return OpenFile(fd, location, verify, verify_checksum, mmap_shared, error_msg);
305 }
306 
OpenZip(int fd,const std::string & location,bool verify,bool verify_checksum,std::string * error_msg,std::vector<std::unique_ptr<const DexFile>> * dex_files) const307 bool ArtDexFileLoader::OpenZip(int fd,
308                                const std::string& location,
309                                bool verify,
310                                bool verify_checksum,
311                                std::string* error_msg,
312                                std::vector<std::unique_ptr<const DexFile>>* dex_files) const {
313   ScopedTrace trace("Dex file open Zip " + std::string(location));
314   return OpenZipInternal(ZipArchive::OpenFromFd(fd, location.c_str(), error_msg),
315                          location,
316                          verify,
317                          verify_checksum,
318                          error_msg,
319                          dex_files);
320 }
321 
OpenZipFromOwnedFd(int fd,const std::string & location,bool verify,bool verify_checksum,std::string * error_msg,std::vector<std::unique_ptr<const DexFile>> * dex_files) const322 bool ArtDexFileLoader::OpenZipFromOwnedFd(
323     int fd,
324     const std::string& location,
325     bool verify,
326     bool verify_checksum,
327     std::string* error_msg,
328     std::vector<std::unique_ptr<const DexFile>>* dex_files) const {
329   ScopedTrace trace("Dex file open Zip " + std::string(location) + " (owned fd)");
330   return OpenZipInternal(ZipArchive::OpenFromOwnedFd(fd, location.c_str(), error_msg),
331                          location,
332                          verify,
333                          verify_checksum,
334                          error_msg,
335                          dex_files);
336 }
337 
OpenZipInternal(ZipArchive * raw_zip_archive,const std::string & location,bool verify,bool verify_checksum,std::string * error_msg,std::vector<std::unique_ptr<const DexFile>> * dex_files) const338 bool ArtDexFileLoader::OpenZipInternal(
339     ZipArchive* raw_zip_archive,
340     const std::string& location,
341     bool verify,
342     bool verify_checksum,
343     std::string* error_msg,
344     std::vector<std::unique_ptr<const DexFile>>* dex_files) const {
345   DCHECK(dex_files != nullptr) << "DexFile::OpenZip: out-param is nullptr";
346   std::unique_ptr<ZipArchive> zip_archive(raw_zip_archive);
347   if (zip_archive.get() == nullptr) {
348     DCHECK(!error_msg->empty());
349     return false;
350   }
351   return OpenAllDexFilesFromZip(
352       *zip_archive, location, verify, verify_checksum, error_msg, dex_files);
353 }
354 
OpenFile(int fd,const std::string & location,bool verify,bool verify_checksum,bool mmap_shared,std::string * error_msg) const355 std::unique_ptr<const DexFile> ArtDexFileLoader::OpenFile(int fd,
356                                                           const std::string& location,
357                                                           bool verify,
358                                                           bool verify_checksum,
359                                                           bool mmap_shared,
360                                                           std::string* error_msg) const {
361   ScopedTrace trace(std::string("Open dex file ") + std::string(location));
362   CHECK(!location.empty());
363   MemMap map;
364   {
365     File delayed_close(fd, /* check_usage= */ false);
366     struct stat sbuf;
367     memset(&sbuf, 0, sizeof(sbuf));
368     if (fstat(fd, &sbuf) == -1) {
369       *error_msg = StringPrintf("DexFile: fstat '%s' failed: %s", location.c_str(),
370                                 strerror(errno));
371       return nullptr;
372     }
373     if (S_ISDIR(sbuf.st_mode)) {
374       *error_msg = StringPrintf("Attempt to mmap directory '%s'", location.c_str());
375       return nullptr;
376     }
377     size_t length = sbuf.st_size;
378     map = MemMap::MapFile(length,
379                           PROT_READ,
380                           mmap_shared ? MAP_SHARED : MAP_PRIVATE,
381                           fd,
382                           0,
383                           /*low_4gb=*/false,
384                           location.c_str(),
385                           error_msg);
386     if (!map.IsValid()) {
387       DCHECK(!error_msg->empty());
388       return nullptr;
389     }
390   }
391 
392   const uint8_t* begin = map.Begin();
393   size_t size = map.Size();
394   if (size < sizeof(DexFile::Header)) {
395     *error_msg = StringPrintf(
396         "DexFile: failed to open dex file '%s' that is too short to have a header",
397         location.c_str());
398     return nullptr;
399   }
400 
401   const DexFile::Header* dex_header = reinterpret_cast<const DexFile::Header*>(begin);
402 
403   std::unique_ptr<DexFile> dex_file = OpenCommon(begin,
404                                                  size,
405                                                  /*data_base=*/ nullptr,
406                                                  /*data_size=*/ 0u,
407                                                  location,
408                                                  dex_header->checksum_,
409                                                  kNoOatDexFile,
410                                                  verify,
411                                                  verify_checksum,
412                                                  error_msg,
413                                                  std::make_unique<MemMapContainer>(std::move(map)),
414                                                  /*verify_result=*/ nullptr);
415 
416   // Opening CompactDex is only supported from vdex files.
417   if (dex_file != nullptr && dex_file->IsCompactDexFile()) {
418     *error_msg = StringPrintf("Opening CompactDex file '%s' is only supported from vdex files",
419                               location.c_str());
420     return nullptr;
421   }
422   return dex_file;
423 }
424 
OpenOneDexFileFromZip(const ZipArchive & zip_archive,const char * entry_name,const std::string & location,bool verify,bool verify_checksum,std::string * error_msg,DexFileLoaderErrorCode * error_code) const425 std::unique_ptr<const DexFile> ArtDexFileLoader::OpenOneDexFileFromZip(
426     const ZipArchive& zip_archive,
427     const char* entry_name,
428     const std::string& location,
429     bool verify,
430     bool verify_checksum,
431     std::string* error_msg,
432     DexFileLoaderErrorCode* error_code) const {
433   ScopedTrace trace("Dex file open from Zip Archive " + std::string(location));
434   CHECK(!location.empty());
435   std::unique_ptr<ZipEntry> zip_entry(zip_archive.Find(entry_name, error_msg));
436   if (zip_entry == nullptr) {
437     *error_code = DexFileLoaderErrorCode::kEntryNotFound;
438     return nullptr;
439   }
440   if (zip_entry->GetUncompressedLength() == 0) {
441     *error_msg = StringPrintf("Dex file '%s' has zero length", location.c_str());
442     *error_code = DexFileLoaderErrorCode::kDexFileError;
443     return nullptr;
444   }
445 
446   MemMap map;
447   if (zip_entry->IsUncompressed()) {
448     if (!zip_entry->IsAlignedTo(alignof(DexFile::Header))) {
449       // Do not mmap unaligned ZIP entries because
450       // doing so would fail dex verification which requires 4 byte alignment.
451       LOG(WARNING) << "Can't mmap dex file " << location << "!" << entry_name << " directly; "
452                    << "please zipalign to " << alignof(DexFile::Header) << " bytes. "
453                    << "Falling back to extracting file.";
454     } else {
455       // Map uncompressed files within zip as file-backed to avoid a dirty copy.
456       map = zip_entry->MapDirectlyFromFile(location.c_str(), /*out*/error_msg);
457       if (!map.IsValid()) {
458         LOG(WARNING) << "Can't mmap dex file " << location << "!" << entry_name << " directly; "
459                      << "is your ZIP file corrupted? Falling back to extraction.";
460         // Try again with Extraction which still has a chance of recovery.
461       }
462     }
463   }
464 
465   ScopedTrace map_extract_trace(StringPrintf("Mapped=%s Extracted=%s",
466       map.IsValid() ? "true" : "false",
467       map.IsValid() ? "false" : "true"));  // this is redundant but much easier to read in traces.
468 
469   if (!map.IsValid()) {
470     // Default path for compressed ZIP entries,
471     // and fallback for stored ZIP entries.
472     map = zip_entry->ExtractToMemMap(location.c_str(), entry_name, error_msg);
473   }
474 
475   if (!map.IsValid()) {
476     *error_msg = StringPrintf("Failed to extract '%s' from '%s': %s", entry_name, location.c_str(),
477                               error_msg->c_str());
478     *error_code = DexFileLoaderErrorCode::kExtractToMemoryError;
479     return nullptr;
480   }
481   VerifyResult verify_result;
482   uint8_t* begin = map.Begin();
483   size_t size = map.Size();
484   std::unique_ptr<DexFile> dex_file = OpenCommon(begin,
485                                                  size,
486                                                  /*data_base=*/ nullptr,
487                                                  /*data_size=*/ 0u,
488                                                  location,
489                                                  zip_entry->GetCrc32(),
490                                                  kNoOatDexFile,
491                                                  verify,
492                                                  verify_checksum,
493                                                  error_msg,
494                                                  std::make_unique<MemMapContainer>(std::move(map)),
495                                                  &verify_result);
496   if (dex_file != nullptr && dex_file->IsCompactDexFile()) {
497     *error_msg = StringPrintf("Opening CompactDex file '%s' is only supported from vdex files",
498                               location.c_str());
499     return nullptr;
500   }
501   if (dex_file == nullptr) {
502     if (verify_result == VerifyResult::kVerifyNotAttempted) {
503       *error_code = DexFileLoaderErrorCode::kDexFileError;
504     } else {
505       *error_code = DexFileLoaderErrorCode::kVerifyError;
506     }
507     return nullptr;
508   }
509   if (!dex_file->DisableWrite()) {
510     *error_msg = StringPrintf("Failed to make dex file '%s' read only", location.c_str());
511     *error_code = DexFileLoaderErrorCode::kMakeReadOnlyError;
512     return nullptr;
513   }
514   CHECK(dex_file->IsReadOnly()) << location;
515   if (verify_result != VerifyResult::kVerifySucceeded) {
516     *error_code = DexFileLoaderErrorCode::kVerifyError;
517     return nullptr;
518   }
519   *error_code = DexFileLoaderErrorCode::kNoError;
520   return dex_file;
521 }
522 
523 // Technically we do not have a limitation with respect to the number of dex files that can be in a
524 // multidex APK. However, it's bad practice, as each dex file requires its own tables for symbols
525 // (types, classes, methods, ...) and dex caches. So warn the user that we open a zip with what
526 // seems an excessive number.
527 static constexpr size_t kWarnOnManyDexFilesThreshold = 100;
528 
OpenAllDexFilesFromZip(const ZipArchive & zip_archive,const std::string & location,bool verify,bool verify_checksum,std::string * error_msg,std::vector<std::unique_ptr<const DexFile>> * dex_files) const529 bool ArtDexFileLoader::OpenAllDexFilesFromZip(
530     const ZipArchive& zip_archive,
531     const std::string& location,
532     bool verify,
533     bool verify_checksum,
534     std::string* error_msg,
535     std::vector<std::unique_ptr<const DexFile>>* dex_files) const {
536   ScopedTrace trace("Dex file open from Zip " + std::string(location));
537   DCHECK(dex_files != nullptr) << "DexFile::OpenFromZip: out-param is nullptr";
538   DexFileLoaderErrorCode error_code;
539   std::unique_ptr<const DexFile> dex_file(OpenOneDexFileFromZip(zip_archive,
540                                                                 kClassesDex,
541                                                                 location,
542                                                                 verify,
543                                                                 verify_checksum,
544                                                                 error_msg,
545                                                                 &error_code));
546   if (dex_file.get() == nullptr) {
547     return false;
548   } else {
549     // Had at least classes.dex.
550     dex_files->push_back(std::move(dex_file));
551 
552     // Now try some more.
553 
554     // We could try to avoid std::string allocations by working on a char array directly. As we
555     // do not expect a lot of iterations, this seems too involved and brittle.
556 
557     for (size_t i = 1; ; ++i) {
558       std::string name = GetMultiDexClassesDexName(i);
559       std::string fake_location = GetMultiDexLocation(i, location.c_str());
560       std::unique_ptr<const DexFile> next_dex_file(OpenOneDexFileFromZip(zip_archive,
561                                                                          name.c_str(),
562                                                                          fake_location,
563                                                                          verify,
564                                                                          verify_checksum,
565                                                                          error_msg,
566                                                                          &error_code));
567       if (next_dex_file.get() == nullptr) {
568         if (error_code != DexFileLoaderErrorCode::kEntryNotFound) {
569           LOG(WARNING) << "Zip open failed: " << *error_msg;
570         }
571         break;
572       } else {
573         dex_files->push_back(std::move(next_dex_file));
574       }
575 
576       if (i == kWarnOnManyDexFilesThreshold) {
577         LOG(WARNING) << location << " has in excess of " << kWarnOnManyDexFilesThreshold
578                      << " dex files. Please consider coalescing and shrinking the number to "
579                         " avoid runtime overhead.";
580       }
581 
582       if (i == std::numeric_limits<size_t>::max()) {
583         LOG(ERROR) << "Overflow in number of dex files!";
584         break;
585       }
586     }
587 
588     return true;
589   }
590 }
591 
OpenCommon(const uint8_t * base,size_t size,const uint8_t * data_base,size_t data_size,const std::string & location,uint32_t location_checksum,const OatDexFile * oat_dex_file,bool verify,bool verify_checksum,std::string * error_msg,std::unique_ptr<DexFileContainer> container,VerifyResult * verify_result)592 std::unique_ptr<DexFile> ArtDexFileLoader::OpenCommon(const uint8_t* base,
593                                                       size_t size,
594                                                       const uint8_t* data_base,
595                                                       size_t data_size,
596                                                       const std::string& location,
597                                                       uint32_t location_checksum,
598                                                       const OatDexFile* oat_dex_file,
599                                                       bool verify,
600                                                       bool verify_checksum,
601                                                       std::string* error_msg,
602                                                       std::unique_ptr<DexFileContainer> container,
603                                                       VerifyResult* verify_result) {
604   return DexFileLoader::OpenCommon(base,
605                                    size,
606                                    data_base,
607                                    data_size,
608                                    location,
609                                    location_checksum,
610                                    oat_dex_file,
611                                    verify,
612                                    verify_checksum,
613                                    error_msg,
614                                    std::move(container),
615                                    verify_result);
616 }
617 
618 }  // namespace art
619