1/*
2 * Copyright (C) 2015 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 "offline_profiling_info.h"
18
19#include "errno.h"
20#include <limits.h>
21#include <vector>
22#include <sys/file.h>
23#include <sys/stat.h>
24#include <sys/uio.h>
25
26#include "art_method-inl.h"
27#include "base/mutex.h"
28#include "base/scoped_flock.h"
29#include "base/stl_util.h"
30#include "base/systrace.h"
31#include "base/unix_file/fd_file.h"
32#include "jit/profiling_info.h"
33#include "os.h"
34#include "safe_map.h"
35
36namespace art {
37
38const uint8_t ProfileCompilationInfo::kProfileMagic[] = { 'p', 'r', 'o', '\0' };
39const uint8_t ProfileCompilationInfo::kProfileVersion[] = { '0', '0', '1', '\0' };
40
41static constexpr uint16_t kMaxDexFileKeyLength = PATH_MAX;
42
43// Transform the actual dex location into relative paths.
44// Note: this is OK because we don't store profiles of different apps into the same file.
45// Apps with split apks don't cause trouble because each split has a different name and will not
46// collide with other entries.
47std::string ProfileCompilationInfo::GetProfileDexFileKey(const std::string& dex_location) {
48  DCHECK(!dex_location.empty());
49  size_t last_sep_index = dex_location.find_last_of('/');
50  if (last_sep_index == std::string::npos) {
51    return dex_location;
52  } else {
53    DCHECK(last_sep_index < dex_location.size());
54    return dex_location.substr(last_sep_index + 1);
55  }
56}
57
58bool ProfileCompilationInfo::AddMethodsAndClasses(
59    const std::vector<MethodReference>& methods,
60    const std::set<DexCacheResolvedClasses>& resolved_classes) {
61  for (const MethodReference& method : methods) {
62    if (!AddMethodIndex(GetProfileDexFileKey(method.dex_file->GetLocation()),
63                        method.dex_file->GetLocationChecksum(),
64                        method.dex_method_index)) {
65      return false;
66    }
67  }
68  for (const DexCacheResolvedClasses& dex_cache : resolved_classes) {
69    if (!AddResolvedClasses(dex_cache)) {
70      return false;
71    }
72  }
73  return true;
74}
75
76bool ProfileCompilationInfo::MergeAndSave(const std::string& filename,
77                                          uint64_t* bytes_written,
78                                          bool force) {
79  ScopedTrace trace(__PRETTY_FUNCTION__);
80  ScopedFlock flock;
81  std::string error;
82  if (!flock.Init(filename.c_str(), O_RDWR | O_NOFOLLOW | O_CLOEXEC, /* block */ false, &error)) {
83    LOG(WARNING) << "Couldn't lock the profile file " << filename << ": " << error;
84    return false;
85  }
86
87  int fd = flock.GetFile()->Fd();
88
89  // Load the file but keep a copy around to be able to infer if the content has changed.
90  ProfileCompilationInfo fileInfo;
91  ProfileLoadSatus status = fileInfo.LoadInternal(fd, &error);
92  if (status == kProfileLoadSuccess) {
93    // Merge the content of file into the current object.
94    if (MergeWith(fileInfo)) {
95      // If after the merge we have the same data as what is the file there's no point
96      // in actually doing the write. The file will be exactly the same as before.
97      if (Equals(fileInfo)) {
98        if (bytes_written != nullptr) {
99          *bytes_written = 0;
100        }
101        return true;
102      }
103    } else {
104      LOG(WARNING) << "Could not merge previous profile data from file " << filename;
105      if (!force) {
106        return false;
107      }
108    }
109  } else if (force &&
110        ((status == kProfileLoadVersionMismatch) || (status == kProfileLoadBadData))) {
111      // Log a warning but don't return false. We will clear the profile anyway.
112      LOG(WARNING) << "Clearing bad or obsolete profile data from file "
113          << filename << ": " << error;
114  } else {
115    LOG(WARNING) << "Could not load profile data from file " << filename << ": " << error;
116    return false;
117  }
118
119  // We need to clear the data because we don't support appending to the profiles yet.
120  if (!flock.GetFile()->ClearContent()) {
121    PLOG(WARNING) << "Could not clear profile file: " << filename;
122    return false;
123  }
124
125  // This doesn't need locking because we are trying to lock the file for exclusive
126  // access and fail immediately if we can't.
127  bool result = Save(fd);
128  if (result) {
129    VLOG(profiler) << "Successfully saved profile info to " << filename
130        << " Size: " << GetFileSizeBytes(filename);
131    if (bytes_written != nullptr) {
132      *bytes_written = GetFileSizeBytes(filename);
133    }
134  } else {
135    VLOG(profiler) << "Failed to save profile info to " << filename;
136  }
137  return result;
138}
139
140// Returns true if all the bytes were successfully written to the file descriptor.
141static bool WriteBuffer(int fd, const uint8_t* buffer, size_t byte_count) {
142  while (byte_count > 0) {
143    int bytes_written = TEMP_FAILURE_RETRY(write(fd, buffer, byte_count));
144    if (bytes_written == -1) {
145      return false;
146    }
147    byte_count -= bytes_written;  // Reduce the number of remaining bytes.
148    buffer += bytes_written;  // Move the buffer forward.
149  }
150  return true;
151}
152
153// Add the string bytes to the buffer.
154static void AddStringToBuffer(std::vector<uint8_t>* buffer, const std::string& value) {
155  buffer->insert(buffer->end(), value.begin(), value.end());
156}
157
158// Insert each byte, from low to high into the buffer.
159template <typename T>
160static void AddUintToBuffer(std::vector<uint8_t>* buffer, T value) {
161  for (size_t i = 0; i < sizeof(T); i++) {
162    buffer->push_back((value >> (i * kBitsPerByte)) & 0xff);
163  }
164}
165
166static constexpr size_t kLineHeaderSize =
167    3 * sizeof(uint16_t) +  // method_set.size + class_set.size + dex_location.size
168    sizeof(uint32_t);       // checksum
169
170/**
171 * Serialization format:
172 *    magic,version,number_of_lines
173 *    dex_location1,number_of_methods1,number_of_classes1,dex_location_checksum1, \
174 *        method_id11,method_id12...,class_id1,class_id2...
175 *    dex_location2,number_of_methods2,number_of_classes2,dex_location_checksum2, \
176 *        method_id21,method_id22...,,class_id1,class_id2...
177 *    .....
178 **/
179bool ProfileCompilationInfo::Save(int fd) {
180  ScopedTrace trace(__PRETTY_FUNCTION__);
181  DCHECK_GE(fd, 0);
182
183  // Cache at most 5KB before writing.
184  static constexpr size_t kMaxSizeToKeepBeforeWriting = 5 * KB;
185  // Use a vector wrapper to avoid keeping track of offsets when we add elements.
186  std::vector<uint8_t> buffer;
187  WriteBuffer(fd, kProfileMagic, sizeof(kProfileMagic));
188  WriteBuffer(fd, kProfileVersion, sizeof(kProfileVersion));
189  AddUintToBuffer(&buffer, static_cast<uint16_t>(info_.size()));
190
191  for (const auto& it : info_) {
192    if (buffer.size() > kMaxSizeToKeepBeforeWriting) {
193      if (!WriteBuffer(fd, buffer.data(), buffer.size())) {
194        return false;
195      }
196      buffer.clear();
197    }
198    const std::string& dex_location = it.first;
199    const DexFileData& dex_data = it.second;
200    if (dex_data.method_set.empty() && dex_data.class_set.empty()) {
201      continue;
202    }
203
204    if (dex_location.size() >= kMaxDexFileKeyLength) {
205      LOG(WARNING) << "DexFileKey exceeds allocated limit";
206      return false;
207    }
208
209    // Make sure that the buffer has enough capacity to avoid repeated resizings
210    // while we add data.
211    size_t required_capacity = buffer.size() +
212        kLineHeaderSize +
213        dex_location.size() +
214        sizeof(uint16_t) * (dex_data.class_set.size() + dex_data.method_set.size());
215
216    buffer.reserve(required_capacity);
217
218    DCHECK_LE(dex_location.size(), std::numeric_limits<uint16_t>::max());
219    DCHECK_LE(dex_data.method_set.size(), std::numeric_limits<uint16_t>::max());
220    DCHECK_LE(dex_data.class_set.size(), std::numeric_limits<uint16_t>::max());
221    AddUintToBuffer(&buffer, static_cast<uint16_t>(dex_location.size()));
222    AddUintToBuffer(&buffer, static_cast<uint16_t>(dex_data.method_set.size()));
223    AddUintToBuffer(&buffer, static_cast<uint16_t>(dex_data.class_set.size()));
224    AddUintToBuffer(&buffer, dex_data.checksum);  // uint32_t
225
226    AddStringToBuffer(&buffer, dex_location);
227
228    for (auto method_it : dex_data.method_set) {
229      AddUintToBuffer(&buffer, method_it);
230    }
231    for (auto class_id : dex_data.class_set) {
232      AddUintToBuffer(&buffer, class_id);
233    }
234    DCHECK_EQ(required_capacity, buffer.size())
235        << "Failed to add the expected number of bytes in the buffer";
236  }
237
238  return WriteBuffer(fd, buffer.data(), buffer.size());
239}
240
241ProfileCompilationInfo::DexFileData* ProfileCompilationInfo::GetOrAddDexFileData(
242    const std::string& dex_location,
243    uint32_t checksum) {
244  auto info_it = info_.find(dex_location);
245  if (info_it == info_.end()) {
246    info_it = info_.Put(dex_location, DexFileData(checksum));
247  }
248  if (info_it->second.checksum != checksum) {
249    LOG(WARNING) << "Checksum mismatch for dex " << dex_location;
250    return nullptr;
251  }
252  return &info_it->second;
253}
254
255bool ProfileCompilationInfo::AddResolvedClasses(const DexCacheResolvedClasses& classes) {
256  const std::string dex_location = GetProfileDexFileKey(classes.GetDexLocation());
257  const uint32_t checksum = classes.GetLocationChecksum();
258  DexFileData* const data = GetOrAddDexFileData(dex_location, checksum);
259  if (data == nullptr) {
260    return false;
261  }
262  data->class_set.insert(classes.GetClasses().begin(), classes.GetClasses().end());
263  return true;
264}
265
266bool ProfileCompilationInfo::AddMethodIndex(const std::string& dex_location,
267                                            uint32_t checksum,
268                                            uint16_t method_idx) {
269  DexFileData* const data = GetOrAddDexFileData(dex_location, checksum);
270  if (data == nullptr) {
271    return false;
272  }
273  data->method_set.insert(method_idx);
274  return true;
275}
276
277bool ProfileCompilationInfo::AddClassIndex(const std::string& dex_location,
278                                           uint32_t checksum,
279                                           uint16_t class_idx) {
280  DexFileData* const data = GetOrAddDexFileData(dex_location, checksum);
281  if (data == nullptr) {
282    return false;
283  }
284  data->class_set.insert(class_idx);
285  return true;
286}
287
288bool ProfileCompilationInfo::ProcessLine(SafeBuffer& line_buffer,
289                                         uint16_t method_set_size,
290                                         uint16_t class_set_size,
291                                         uint32_t checksum,
292                                         const std::string& dex_location) {
293  for (uint16_t i = 0; i < method_set_size; i++) {
294    uint16_t method_idx = line_buffer.ReadUintAndAdvance<uint16_t>();
295    if (!AddMethodIndex(dex_location, checksum, method_idx)) {
296      return false;
297    }
298  }
299
300  for (uint16_t i = 0; i < class_set_size; i++) {
301    uint16_t class_def_idx = line_buffer.ReadUintAndAdvance<uint16_t>();
302    if (!AddClassIndex(dex_location, checksum, class_def_idx)) {
303      return false;
304    }
305  }
306  return true;
307}
308
309// Tests for EOF by trying to read 1 byte from the descriptor.
310// Returns:
311//   0 if the descriptor is at the EOF,
312//  -1 if there was an IO error
313//   1 if the descriptor has more content to read
314static int testEOF(int fd) {
315  uint8_t buffer[1];
316  return TEMP_FAILURE_RETRY(read(fd, buffer, 1));
317}
318
319// Reads an uint value previously written with AddUintToBuffer.
320template <typename T>
321T ProfileCompilationInfo::SafeBuffer::ReadUintAndAdvance() {
322  static_assert(std::is_unsigned<T>::value, "Type is not unsigned");
323  CHECK_LE(ptr_current_ + sizeof(T), ptr_end_);
324  T value = 0;
325  for (size_t i = 0; i < sizeof(T); i++) {
326    value += ptr_current_[i] << (i * kBitsPerByte);
327  }
328  ptr_current_ += sizeof(T);
329  return value;
330}
331
332bool ProfileCompilationInfo::SafeBuffer::CompareAndAdvance(const uint8_t* data, size_t data_size) {
333  if (ptr_current_ + data_size > ptr_end_) {
334    return false;
335  }
336  if (memcmp(ptr_current_, data, data_size) == 0) {
337    ptr_current_ += data_size;
338    return true;
339  }
340  return false;
341}
342
343ProfileCompilationInfo::ProfileLoadSatus ProfileCompilationInfo::SafeBuffer::FillFromFd(
344      int fd,
345      const std::string& source,
346      /*out*/std::string* error) {
347  size_t byte_count = ptr_end_ - ptr_current_;
348  uint8_t* buffer = ptr_current_;
349  while (byte_count > 0) {
350    int bytes_read = TEMP_FAILURE_RETRY(read(fd, buffer, byte_count));
351    if (bytes_read == 0) {
352      *error += "Profile EOF reached prematurely for " + source;
353      return kProfileLoadBadData;
354    } else if (bytes_read < 0) {
355      *error += "Profile IO error for " + source + strerror(errno);
356      return kProfileLoadIOError;
357    }
358    byte_count -= bytes_read;
359    buffer += bytes_read;
360  }
361  return kProfileLoadSuccess;
362}
363
364ProfileCompilationInfo::ProfileLoadSatus ProfileCompilationInfo::ReadProfileHeader(
365      int fd,
366      /*out*/uint16_t* number_of_lines,
367      /*out*/std::string* error) {
368  // Read magic and version
369  const size_t kMagicVersionSize =
370    sizeof(kProfileMagic) +
371    sizeof(kProfileVersion) +
372    sizeof(uint16_t);  // number of lines
373
374  SafeBuffer safe_buffer(kMagicVersionSize);
375
376  ProfileLoadSatus status = safe_buffer.FillFromFd(fd, "ReadProfileHeader", error);
377  if (status != kProfileLoadSuccess) {
378    return status;
379  }
380
381  if (!safe_buffer.CompareAndAdvance(kProfileMagic, sizeof(kProfileMagic))) {
382    *error = "Profile missing magic";
383    return kProfileLoadVersionMismatch;
384  }
385  if (!safe_buffer.CompareAndAdvance(kProfileVersion, sizeof(kProfileVersion))) {
386    *error = "Profile version mismatch";
387    return kProfileLoadVersionMismatch;
388  }
389  *number_of_lines = safe_buffer.ReadUintAndAdvance<uint16_t>();
390  return kProfileLoadSuccess;
391}
392
393ProfileCompilationInfo::ProfileLoadSatus ProfileCompilationInfo::ReadProfileLineHeader(
394      int fd,
395      /*out*/ProfileLineHeader* line_header,
396      /*out*/std::string* error) {
397  SafeBuffer header_buffer(kLineHeaderSize);
398  ProfileLoadSatus status = header_buffer.FillFromFd(fd, "ReadProfileHeader", error);
399  if (status != kProfileLoadSuccess) {
400    return status;
401  }
402
403  uint16_t dex_location_size = header_buffer.ReadUintAndAdvance<uint16_t>();
404  line_header->method_set_size = header_buffer.ReadUintAndAdvance<uint16_t>();
405  line_header->class_set_size = header_buffer.ReadUintAndAdvance<uint16_t>();
406  line_header->checksum = header_buffer.ReadUintAndAdvance<uint32_t>();
407
408  if (dex_location_size == 0 || dex_location_size > kMaxDexFileKeyLength) {
409    *error = "DexFileKey has an invalid size: " + std::to_string(dex_location_size);
410    return kProfileLoadBadData;
411  }
412
413  SafeBuffer location_buffer(dex_location_size);
414  status = location_buffer.FillFromFd(fd, "ReadProfileHeaderDexLocation", error);
415  if (status != kProfileLoadSuccess) {
416    return status;
417  }
418  line_header->dex_location.assign(
419      reinterpret_cast<char*>(location_buffer.Get()), dex_location_size);
420  return kProfileLoadSuccess;
421}
422
423ProfileCompilationInfo::ProfileLoadSatus ProfileCompilationInfo::ReadProfileLine(
424      int fd,
425      const ProfileLineHeader& line_header,
426      /*out*/std::string* error) {
427  // Make sure that we don't try to read everything in memory (in case the profile if full).
428  // Split readings in chunks of at most 10kb.
429  static constexpr uint16_t kMaxNumberOfEntriesToRead = 5120;
430  uint16_t methods_left_to_read = line_header.method_set_size;
431  uint16_t classes_left_to_read = line_header.class_set_size;
432
433  while ((methods_left_to_read > 0) || (classes_left_to_read > 0)) {
434    uint16_t methods_to_read = std::min(kMaxNumberOfEntriesToRead, methods_left_to_read);
435    uint16_t max_classes_to_read = kMaxNumberOfEntriesToRead - methods_to_read;
436    uint16_t classes_to_read = std::min(max_classes_to_read, classes_left_to_read);
437
438    size_t line_size = sizeof(uint16_t) * (methods_to_read + classes_to_read);
439    SafeBuffer line_buffer(line_size);
440
441    ProfileLoadSatus status = line_buffer.FillFromFd(fd, "ReadProfileLine", error);
442    if (status != kProfileLoadSuccess) {
443      return status;
444    }
445    if (!ProcessLine(line_buffer,
446                     methods_to_read,
447                     classes_to_read,
448                     line_header.checksum,
449                     line_header.dex_location)) {
450      *error = "Error when reading profile file line";
451      return kProfileLoadBadData;
452    }
453    methods_left_to_read -= methods_to_read;
454    classes_left_to_read -= classes_to_read;
455  }
456  return kProfileLoadSuccess;
457}
458
459bool ProfileCompilationInfo::Load(int fd) {
460  std::string error;
461  ProfileLoadSatus status = LoadInternal(fd, &error);
462
463  if (status == kProfileLoadSuccess) {
464    return true;
465  } else {
466    PLOG(WARNING) << "Error when reading profile " << error;
467    return false;
468  }
469}
470
471ProfileCompilationInfo::ProfileLoadSatus ProfileCompilationInfo::LoadInternal(
472      int fd, std::string* error) {
473  ScopedTrace trace(__PRETTY_FUNCTION__);
474  DCHECK_GE(fd, 0);
475
476  struct stat stat_buffer;
477  if (fstat(fd, &stat_buffer) != 0) {
478    return kProfileLoadIOError;
479  }
480  // We allow empty profile files.
481  // Profiles may be created by ActivityManager or installd before we manage to
482  // process them in the runtime or profman.
483  if (stat_buffer.st_size == 0) {
484    return kProfileLoadSuccess;
485  }
486  // Read profile header: magic + version + number_of_lines.
487  uint16_t number_of_lines;
488  ProfileLoadSatus status = ReadProfileHeader(fd, &number_of_lines, error);
489  if (status != kProfileLoadSuccess) {
490    return status;
491  }
492
493  while (number_of_lines > 0) {
494    ProfileLineHeader line_header;
495    // First, read the line header to get the amount of data we need to read.
496    status = ReadProfileLineHeader(fd, &line_header, error);
497    if (status != kProfileLoadSuccess) {
498      return status;
499    }
500
501    // Now read the actual profile line.
502    status = ReadProfileLine(fd, line_header, error);
503    if (status != kProfileLoadSuccess) {
504      return status;
505    }
506    number_of_lines--;
507  }
508
509  // Check that we read everything and that profiles don't contain junk data.
510  int result = testEOF(fd);
511  if (result == 0) {
512    return kProfileLoadSuccess;
513  } else if (result < 0) {
514    return kProfileLoadIOError;
515  } else {
516    *error = "Unexpected content in the profile file";
517    return kProfileLoadBadData;
518  }
519}
520
521bool ProfileCompilationInfo::MergeWith(const ProfileCompilationInfo& other) {
522  // First verify that all checksums match. This will avoid adding garbage to
523  // the current profile info.
524  // Note that the number of elements should be very small, so this should not
525  // be a performance issue.
526  for (const auto& other_it : other.info_) {
527    auto info_it = info_.find(other_it.first);
528    if ((info_it != info_.end()) && (info_it->second.checksum != other_it.second.checksum)) {
529      LOG(WARNING) << "Checksum mismatch for dex " << other_it.first;
530      return false;
531    }
532  }
533  // All checksums match. Import the data.
534  for (const auto& other_it : other.info_) {
535    const std::string& other_dex_location = other_it.first;
536    const DexFileData& other_dex_data = other_it.second;
537    auto info_it = info_.find(other_dex_location);
538    if (info_it == info_.end()) {
539      info_it = info_.Put(other_dex_location, DexFileData(other_dex_data.checksum));
540    }
541    info_it->second.method_set.insert(other_dex_data.method_set.begin(),
542                                      other_dex_data.method_set.end());
543    info_it->second.class_set.insert(other_dex_data.class_set.begin(),
544                                     other_dex_data.class_set.end());
545  }
546  return true;
547}
548
549bool ProfileCompilationInfo::ContainsMethod(const MethodReference& method_ref) const {
550  auto info_it = info_.find(GetProfileDexFileKey(method_ref.dex_file->GetLocation()));
551  if (info_it != info_.end()) {
552    if (method_ref.dex_file->GetLocationChecksum() != info_it->second.checksum) {
553      return false;
554    }
555    const std::set<uint16_t>& methods = info_it->second.method_set;
556    return methods.find(method_ref.dex_method_index) != methods.end();
557  }
558  return false;
559}
560
561bool ProfileCompilationInfo::ContainsClass(const DexFile& dex_file, uint16_t class_def_idx) const {
562  auto info_it = info_.find(GetProfileDexFileKey(dex_file.GetLocation()));
563  if (info_it != info_.end()) {
564    if (dex_file.GetLocationChecksum() != info_it->second.checksum) {
565      return false;
566    }
567    const std::set<uint16_t>& classes = info_it->second.class_set;
568    return classes.find(class_def_idx) != classes.end();
569  }
570  return false;
571}
572
573uint32_t ProfileCompilationInfo::GetNumberOfMethods() const {
574  uint32_t total = 0;
575  for (const auto& it : info_) {
576    total += it.second.method_set.size();
577  }
578  return total;
579}
580
581uint32_t ProfileCompilationInfo::GetNumberOfResolvedClasses() const {
582  uint32_t total = 0;
583  for (const auto& it : info_) {
584    total += it.second.class_set.size();
585  }
586  return total;
587}
588
589std::string ProfileCompilationInfo::DumpInfo(const std::vector<const DexFile*>* dex_files,
590                                             bool print_full_dex_location) const {
591  std::ostringstream os;
592  if (info_.empty()) {
593    return "ProfileInfo: empty";
594  }
595
596  os << "ProfileInfo:";
597
598  const std::string kFirstDexFileKeySubstitute = ":classes.dex";
599  for (const auto& it : info_) {
600    os << "\n";
601    const std::string& location = it.first;
602    const DexFileData& dex_data = it.second;
603    if (print_full_dex_location) {
604      os << location;
605    } else {
606      // Replace the (empty) multidex suffix of the first key with a substitute for easier reading.
607      std::string multidex_suffix = DexFile::GetMultiDexSuffix(location);
608      os << (multidex_suffix.empty() ? kFirstDexFileKeySubstitute : multidex_suffix);
609    }
610    const DexFile* dex_file = nullptr;
611    if (dex_files != nullptr) {
612      for (size_t i = 0; i < dex_files->size(); i++) {
613        if (location == (*dex_files)[i]->GetLocation()) {
614          dex_file = (*dex_files)[i];
615        }
616      }
617    }
618    os << "\n\tmethods: ";
619    for (const auto method_it : dex_data.method_set) {
620      if (dex_file != nullptr) {
621        os << "\n\t\t" << PrettyMethod(method_it, *dex_file, true);
622      } else {
623        os << method_it << ",";
624      }
625    }
626    os << "\n\tclasses: ";
627    for (const auto class_it : dex_data.class_set) {
628      if (dex_file != nullptr) {
629        os << "\n\t\t" << PrettyType(class_it, *dex_file);
630      } else {
631        os << class_it << ",";
632      }
633    }
634  }
635  return os.str();
636}
637
638bool ProfileCompilationInfo::Equals(const ProfileCompilationInfo& other) {
639  return info_.Equals(other.info_);
640}
641
642std::set<DexCacheResolvedClasses> ProfileCompilationInfo::GetResolvedClasses() const {
643  std::set<DexCacheResolvedClasses> ret;
644  for (auto&& pair : info_) {
645    const std::string& profile_key = pair.first;
646    const DexFileData& data = pair.second;
647    // TODO: Is it OK to use the same location for both base and dex location here?
648    DexCacheResolvedClasses classes(profile_key, profile_key, data.checksum);
649    classes.AddClasses(data.class_set.begin(), data.class_set.end());
650    ret.insert(classes);
651  }
652  return ret;
653}
654
655void ProfileCompilationInfo::ClearResolvedClasses() {
656  for (auto& pair : info_) {
657    pair.second.class_set.clear();
658  }
659}
660
661}  // namespace art
662