oat_writer.cc revision 0571d357843c53e042f370f5f2c2e9aa3fe803a9 
1// Copyright 2011 Google Inc. All Rights Reserved.
2
3#include "oat_writer.h"
4
5#include "class_linker.h"
6#include "class_loader.h"
7#include "file.h"
8#include "os.h"
9#include "stl_util.h"
10
11namespace art {
12
13bool OatWriter::Create(File* file,
14                       const ClassLoader* class_loader,
15                       const Compiler& compiler) {
16  const std::vector<const DexFile*>& dex_files = ClassLoader::GetCompileTimeClassPath(class_loader);
17  OatWriter oat_writer(dex_files, class_loader, compiler);
18  return oat_writer.Write(file);
19}
20
21OatWriter::OatWriter(const std::vector<const DexFile*>& dex_files,
22                     const ClassLoader* class_loader,
23                     const Compiler& compiler) {
24  compiler_ = &compiler;
25  class_loader_ = class_loader;
26  dex_files_ = &dex_files;
27  oat_header_ = NULL;
28  executable_offset_padding_length_ = 0;
29
30  size_t offset = InitOatHeader();
31  offset = InitOatDexFiles(offset);
32  offset = InitOatClasses(offset);
33  offset = InitOatMethods(offset);
34  offset = InitOatCode(offset);
35  offset = InitOatCodeDexFiles(offset);
36
37  CHECK_EQ(dex_files_->size(), oat_dex_files_.size());
38  CHECK_EQ(dex_files_->size(), oat_classes_.size());
39}
40
41OatWriter::~OatWriter() {
42  delete oat_header_;
43  STLDeleteElements(&oat_dex_files_);
44  STLDeleteElements(&oat_classes_);
45  STLDeleteElements(&oat_methods_);
46}
47
48size_t OatWriter::InitOatHeader() {
49  // create the OatHeader
50  oat_header_ = new OatHeader(dex_files_);
51  size_t offset = sizeof(*oat_header_);
52  return offset;
53}
54
55size_t OatWriter::InitOatDexFiles(size_t offset) {
56  // create the OatDexFiles
57  for (size_t i = 0; i != dex_files_->size(); ++i) {
58    const DexFile* dex_file = (*dex_files_)[i];
59    CHECK(dex_file != NULL);
60    OatDexFile* oat_dex_file = new OatDexFile(*dex_file);
61    oat_dex_files_.push_back(oat_dex_file);
62    offset += oat_dex_file->SizeOf();
63  }
64  return offset;
65}
66
67size_t OatWriter::InitOatClasses(size_t offset) {
68  // create the OatClasses
69  // calculate the offsets within OatDexFiles to OatClasses
70  for (size_t i = 0; i != dex_files_->size(); ++i) {
71    // set offset in OatDexFile to OatClasses
72    oat_dex_files_[i]->classes_offset_ = offset;
73    oat_dex_files_[i]->UpdateChecksum(*oat_header_);
74
75    const DexFile* dex_file = (*dex_files_)[i];
76    OatClasses* oat_classes = new OatClasses(*dex_file);
77    oat_classes_.push_back(oat_classes);
78    offset += oat_classes->SizeOf();
79  }
80  return offset;
81}
82
83size_t OatWriter::InitOatMethods(size_t offset) {
84  // create the OatMethods
85  // calculate the offsets within OatClasses to OatMethods
86  size_t class_index = 0;
87  for (size_t i = 0; i != dex_files_->size(); ++i) {
88    const DexFile* dex_file = (*dex_files_)[i];
89    for (size_t class_def_index = 0;
90         class_def_index < dex_file->NumClassDefs();
91         class_def_index++, class_index++) {
92      oat_classes_[i]->methods_offsets_[class_def_index] = offset;
93      const DexFile::ClassDef& class_def = dex_file->GetClassDef(class_def_index);
94      const byte* class_data = dex_file->GetClassData(class_def);
95      uint32_t num_methods = 0;
96      if (class_data != NULL) {  // ie not an empty class, such as a marker interface
97        ClassDataItemIterator it(*dex_file, class_data);
98        size_t num_direct_methods = it.NumDirectMethods();
99        size_t num_virtual_methods = it.NumVirtualMethods();
100        num_methods = num_direct_methods + num_virtual_methods;
101      }
102      OatMethods* oat_methods = new OatMethods(num_methods);
103      oat_methods_.push_back(oat_methods);
104      offset += oat_methods->SizeOf();
105    }
106    oat_classes_[i]->UpdateChecksum(*oat_header_);
107  }
108  return offset;
109}
110
111size_t OatWriter::InitOatCode(size_t offset) {
112  // calculate the offsets within OatHeader to executable code
113  size_t old_offset = offset;
114  // required to be on a new page boundary
115  offset = RoundUp(offset, kPageSize);
116  oat_header_->SetExecutableOffset(offset);
117  executable_offset_padding_length_ = offset - old_offset;
118  return offset;
119}
120
121size_t OatWriter::InitOatCodeDexFiles(size_t offset) {
122  // calculate the offsets within OatMethods
123  size_t oat_class_index = 0;
124  for (size_t i = 0; i != dex_files_->size(); ++i) {
125    const DexFile* dex_file = (*dex_files_)[i];
126    CHECK(dex_file != NULL);
127    offset = InitOatCodeDexFile(offset, oat_class_index, *dex_file);
128  }
129  return offset;
130}
131
132size_t OatWriter::InitOatCodeDexFile(size_t offset,
133                                     size_t& oat_class_index,
134                                     const DexFile& dex_file) {
135  for (size_t class_def_index = 0;
136       class_def_index < dex_file.NumClassDefs();
137       class_def_index++, oat_class_index++) {
138    const DexFile::ClassDef& class_def = dex_file.GetClassDef(class_def_index);
139    offset = InitOatCodeClassDef(offset, oat_class_index, dex_file, class_def);
140    oat_methods_[oat_class_index]->UpdateChecksum(*oat_header_);
141  }
142  return offset;
143}
144
145size_t OatWriter::InitOatCodeClassDef(size_t offset,
146                                      size_t oat_class_index,
147                                      const DexFile& dex_file,
148                                      const DexFile::ClassDef& class_def) {
149  const byte* class_data = dex_file.GetClassData(class_def);
150  if (class_data == NULL) {
151    // empty class, such as a marker interface
152    return offset;
153  }
154  ClassDataItemIterator it(dex_file, class_data);
155  CHECK_EQ(oat_methods_[oat_class_index]->method_offsets_.size(),
156           it.NumDirectMethods() + it.NumVirtualMethods());
157  // Skip fields
158  while (it.HasNextStaticField()) {
159    it.Next();
160  }
161  while (it.HasNextInstanceField()) {
162    it.Next();
163  }
164  // Process methods
165  size_t class_def_method_index = 0;
166  while (it.HasNextDirectMethod()) {
167    bool is_static = (it.GetMemberAccessFlags() & kAccStatic) != 0;
168    offset = InitOatCodeMethod(offset, oat_class_index, class_def_method_index, is_static, true,
169                               it.GetMemberIndex(), &dex_file);
170    class_def_method_index++;
171    it.Next();
172  }
173  while (it.HasNextVirtualMethod()) {
174    CHECK_EQ(it.GetMemberAccessFlags() & kAccStatic, 0U);
175    offset = InitOatCodeMethod(offset, oat_class_index, class_def_method_index, false, false,
176                               it.GetMemberIndex(), &dex_file);
177    class_def_method_index++;
178    it.Next();
179  }
180  DCHECK(!it.HasNext());
181  return offset;
182}
183
184size_t OatWriter::InitOatCodeMethod(size_t offset, size_t oat_class_index,
185                                    size_t class_def_method_index, bool is_static, bool is_direct,
186                                    uint32_t method_idx, const DexFile* dex_file) {
187  // derived from CompiledMethod if available
188  uint32_t code_offset = 0;
189  uint32_t frame_size_in_bytes = kStackAlignment;
190  uint32_t core_spill_mask = 0;
191  uint32_t fp_spill_mask = 0;
192  uint32_t mapping_table_offset = 0;
193  uint32_t vmap_table_offset = 0;
194  // derived from CompiledInvokeStub if available
195  uint32_t invoke_stub_offset = 0;
196
197  CompiledMethod* compiled_method =
198      compiler_->GetCompiledMethod(art::Compiler::MethodReference(dex_file, method_idx));
199  if (compiled_method != NULL) {
200    offset = compiled_method->AlignCode(offset);
201    DCHECK_ALIGNED(offset, kArmAlignment);
202    const std::vector<uint8_t>& code = compiled_method->GetCode();
203    size_t code_size = code.size() * sizeof(code[0]);
204    uint32_t thumb_offset = compiled_method->CodeDelta();
205    code_offset = (code_size == 0) ? 0 : offset + thumb_offset;
206
207    // Deduplicate code arrays
208    std::map<const std::vector<uint8_t>*, uint32_t>::iterator code_iter = code_offsets_.find(&code);
209    if (code_iter != code_offsets_.end()) {
210      code_offset = code_iter->second;
211    } else {
212      code_offsets_.insert(std::pair<const std::vector<uint8_t>*, uint32_t>(&code, code_offset));
213      offset += code_size;
214      oat_header_->UpdateChecksum(&code[0], code_size);
215    }
216
217    frame_size_in_bytes = compiled_method->GetFrameSizeInBytes();
218    core_spill_mask = compiled_method->GetCoreSpillMask();
219    fp_spill_mask = compiled_method->GetFpSpillMask();
220  }
221
222  offset += sizeof(frame_size_in_bytes);
223  oat_header_->UpdateChecksum(&frame_size_in_bytes, sizeof(frame_size_in_bytes));
224
225  offset += sizeof(core_spill_mask);
226  oat_header_->UpdateChecksum(&core_spill_mask, sizeof(core_spill_mask));
227
228  offset += sizeof(fp_spill_mask);
229  oat_header_->UpdateChecksum(&fp_spill_mask, sizeof(fp_spill_mask));
230
231  if (compiled_method != NULL) {
232    const std::vector<uint32_t>& mapping_table = compiled_method->GetMappingTable();
233    size_t mapping_table_size = mapping_table.size() * sizeof(mapping_table[0]);
234    mapping_table_offset = (mapping_table_size == 0) ? 0 : offset;
235
236    // Deduplicate mapping tables
237    std::map<const std::vector<uint32_t>*, uint32_t>::iterator mapping_iter = mapping_table_offsets_.find(&mapping_table);
238    if (mapping_iter != mapping_table_offsets_.end()) {
239      mapping_table_offset = mapping_iter->second;
240    } else {
241      mapping_table_offsets_.insert(std::pair<const std::vector<uint32_t>*, uint32_t>(&mapping_table, mapping_table_offset));
242      offset += mapping_table_size;
243      oat_header_->UpdateChecksum(&mapping_table[0], mapping_table_size);
244    }
245
246    const std::vector<uint16_t>& vmap_table = compiled_method->GetVmapTable();
247    size_t vmap_table_size = vmap_table.size() * sizeof(vmap_table[0]);
248    vmap_table_offset = (vmap_table_size == 0) ? 0 : offset;
249
250    // Deduplicate vmap tables
251    std::map<const std::vector<uint16_t>*, uint32_t>::iterator vmap_iter = vmap_table_offsets_.find(&vmap_table);
252    if (vmap_iter != vmap_table_offsets_.end()) {
253      vmap_table_offset = vmap_iter->second;
254    } else {
255      vmap_table_offsets_.insert(std::pair<const std::vector<uint16_t>*, uint32_t>(&vmap_table, vmap_table_offset));
256      offset += vmap_table_size;
257      oat_header_->UpdateChecksum(&vmap_table[0], vmap_table_size);
258    }
259  }
260
261  const char* shorty = dex_file->GetMethodShorty(dex_file->GetMethodId(method_idx));
262  const CompiledInvokeStub* compiled_invoke_stub = compiler_->FindInvokeStub(is_static, shorty);
263  if (compiled_invoke_stub != NULL) {
264    offset = CompiledMethod::AlignCode(offset, compiler_->GetInstructionSet());
265    DCHECK_ALIGNED(offset, kArmAlignment);
266    const std::vector<uint8_t>& invoke_stub = compiled_invoke_stub->GetCode();
267    size_t invoke_stub_size = invoke_stub.size() * sizeof(invoke_stub[0]);
268    invoke_stub_offset = (invoke_stub_size == 0) ? 0 : offset;
269
270    // Deduplicate invoke stubs
271    std::map<const std::vector<uint8_t>*, uint32_t>::iterator stub_iter = code_offsets_.find(&invoke_stub);
272    if (stub_iter != code_offsets_.end()) {
273      invoke_stub_offset = stub_iter->second;
274    } else {
275      code_offsets_.insert(std::pair<const std::vector<uint8_t>*, uint32_t>(&invoke_stub, invoke_stub_offset));
276      offset += invoke_stub_size;
277      oat_header_->UpdateChecksum(&invoke_stub[0], invoke_stub_size);
278    }
279  }
280
281  oat_methods_[oat_class_index]->method_offsets_[class_def_method_index]
282      = OatMethodOffsets(code_offset,
283                         frame_size_in_bytes,
284                         core_spill_mask,
285                         fp_spill_mask,
286                         mapping_table_offset,
287                         vmap_table_offset,
288                         invoke_stub_offset);
289
290  if (compiler_->IsImage()) {
291    ClassLinker* linker = Runtime::Current()->GetClassLinker();
292    DexCache* dex_cache = linker->FindDexCache(*dex_file);
293    Method* method = linker->ResolveMethod(*dex_file, method_idx, dex_cache, class_loader_,
294                                           is_direct);
295    CHECK(method != NULL);
296    method->SetFrameSizeInBytes(frame_size_in_bytes);
297    method->SetCoreSpillMask(core_spill_mask);
298    method->SetFpSpillMask(fp_spill_mask);
299    method->SetOatMappingTableOffset(mapping_table_offset);
300    method->SetOatCodeOffset(code_offset);
301    method->SetOatVmapTableOffset(vmap_table_offset);
302    method->SetOatInvokeStubOffset(invoke_stub_offset);
303  }
304  return offset;
305}
306
307#define DCHECK_CODE_OFFSET() \
308  DCHECK_EQ(static_cast<off_t>(code_offset), lseek(file->Fd(), 0, SEEK_CUR))
309
310bool OatWriter::Write(File* file) {
311  if (!file->WriteFully(oat_header_, sizeof(*oat_header_))) {
312    PLOG(ERROR) << "Failed to write oat header to " << file->name();
313    return false;
314  }
315
316  if (!WriteTables(file)) {
317    LOG(ERROR) << "Failed to write oat tables to " << file->name();
318    return false;
319  }
320
321  size_t code_offset = WriteCode(file);
322  if (code_offset == 0) {
323    LOG(ERROR) << "Failed to write oat code to " << file->name();
324    return false;
325  }
326
327  code_offset = WriteCodeDexFiles(file, code_offset);
328  if (code_offset == 0) {
329    LOG(ERROR) << "Failed to write oat code for dex files to " << file->name();
330    return false;
331  }
332
333  return true;
334}
335
336bool OatWriter::WriteTables(File* file) {
337  for (size_t i = 0; i != oat_dex_files_.size(); ++i) {
338    if (!oat_dex_files_[i]->Write(file)) {
339      PLOG(ERROR) << "Failed to write oat dex information to " << file->name();
340      return false;
341    }
342  }
343  for (size_t i = 0; i != oat_classes_.size(); ++i) {
344    if (!oat_classes_[i]->Write(file)) {
345      PLOG(ERROR) << "Failed to write oat classes information to " << file->name();
346      return false;
347    }
348  }
349  for (size_t i = 0; i != oat_methods_.size(); ++i) {
350    if (!oat_methods_[i]->Write(file)) {
351      PLOG(ERROR) << "Failed to write oat methods information to " << file->name();
352      return false;
353    }
354  }
355  return true;
356}
357
358size_t OatWriter::WriteCode(File* file) {
359  uint32_t code_offset = oat_header_->GetExecutableOffset();
360  off_t new_offset = lseek(file->Fd(), executable_offset_padding_length_, SEEK_CUR);
361  if (static_cast<uint32_t>(new_offset) != code_offset) {
362    PLOG(ERROR) << "Failed to seek to oat code section. Actual: " << new_offset
363                << " Expected: " << code_offset << " File: " << file->name();
364    return 0;
365  }
366  DCHECK_CODE_OFFSET();
367  return code_offset;
368}
369
370size_t OatWriter::WriteCodeDexFiles(File* file, size_t code_offset) {
371  size_t oat_class_index = 0;
372  for (size_t i = 0; i != oat_classes_.size(); ++i) {
373    const DexFile* dex_file = (*dex_files_)[i];
374    CHECK(dex_file != NULL);
375    code_offset = WriteCodeDexFile(file, code_offset, oat_class_index, *dex_file);
376    if (code_offset == 0) {
377      return 0;
378    }
379  }
380  return code_offset;
381}
382
383size_t OatWriter::WriteCodeDexFile(File* file, size_t code_offset, size_t& oat_class_index,
384                                   const DexFile& dex_file) {
385  for (size_t class_def_index = 0; class_def_index < dex_file.NumClassDefs();
386      class_def_index++, oat_class_index++) {
387    const DexFile::ClassDef& class_def = dex_file.GetClassDef(class_def_index);
388    code_offset = WriteCodeClassDef(file, code_offset, oat_class_index, dex_file, class_def);
389    if (code_offset == 0) {
390      return 0;
391    }
392  }
393  return code_offset;
394}
395
396void OatWriter::ReportWriteFailure(const char* what, uint32_t method_idx,
397                                   const DexFile& dex_file, File* f) const {
398  PLOG(ERROR) << "Failed to write " << what << " for " << PrettyMethod(method_idx, dex_file)
399      << " to " << f->name();
400}
401
402size_t OatWriter::WriteCodeClassDef(File* file,
403                                    size_t code_offset, size_t oat_class_index,
404                                    const DexFile& dex_file,
405                                    const DexFile::ClassDef& class_def) {
406  const byte* class_data = dex_file.GetClassData(class_def);
407  if (class_data == NULL) {
408    // ie. an empty class such as a marker interface
409    return code_offset;
410  }
411  ClassDataItemIterator it(dex_file, class_data);
412  // Skip fields
413  while (it.HasNextStaticField()) {
414    it.Next();
415  }
416  while (it.HasNextInstanceField()) {
417    it.Next();
418  }
419  // Process methods
420  size_t class_def_method_index = 0;
421  while (it.HasNextDirectMethod()) {
422    bool is_static = (it.GetMemberAccessFlags() & kAccStatic) != 0;
423    code_offset = WriteCodeMethod(file, code_offset, oat_class_index, class_def_method_index,
424                                  is_static, it.GetMemberIndex(), dex_file);
425    if (code_offset == 0) {
426      return 0;
427    }
428    class_def_method_index++;
429    it.Next();
430  }
431  while (it.HasNextVirtualMethod()) {
432    code_offset = WriteCodeMethod(file, code_offset, oat_class_index, class_def_method_index,
433                                  false, it.GetMemberIndex(), dex_file);
434    if (code_offset == 0) {
435      return 0;
436    }
437    class_def_method_index++;
438    it.Next();
439  }
440  return code_offset;
441}
442
443size_t OatWriter::WriteCodeMethod(File* file, size_t code_offset, size_t oat_class_index,
444                                  size_t class_def_method_index, bool is_static,
445                                  uint32_t method_idx, const DexFile& dex_file) {
446  const CompiledMethod* compiled_method =
447      compiler_->GetCompiledMethod(art::Compiler::MethodReference(&dex_file, method_idx));
448
449  uint32_t frame_size_in_bytes = 0;
450  uint32_t core_spill_mask = 0;
451  uint32_t fp_spill_mask = 0;
452
453  OatMethodOffsets method_offsets =
454      oat_methods_[oat_class_index]->method_offsets_[class_def_method_index];
455
456
457  if (compiled_method != NULL) {  // ie. not an abstract method
458    uint32_t aligned_code_offset = compiled_method->AlignCode(code_offset);
459    uint32_t aligned_code_delta = aligned_code_offset - code_offset;
460    if (aligned_code_delta != 0) {
461      off_t new_offset = lseek(file->Fd(), aligned_code_delta, SEEK_CUR);
462      if (static_cast<uint32_t>(new_offset) != aligned_code_offset) {
463        PLOG(ERROR) << "Failed to seek to align oat code. Actual: " << new_offset
464                    << " Expected: " << aligned_code_offset << " File: " << file->name();
465        return false;
466      }
467      code_offset += aligned_code_delta;
468      DCHECK_CODE_OFFSET();
469    }
470    DCHECK_ALIGNED(code_offset, kArmAlignment);
471    const std::vector<uint8_t>& code = compiled_method->GetCode();
472    size_t code_size = code.size() * sizeof(code[0]);
473
474    // Deduplicate code arrays
475    size_t offset = code_offset + compiled_method->CodeDelta();
476    std::map<const std::vector<uint8_t>*, uint32_t>::iterator code_iter = code_offsets_.find(&code);
477    if (code_iter != code_offsets_.end() && offset != method_offsets.code_offset_) {
478      DCHECK((code_size == 0 && method_offsets.code_offset_ == 0)
479             || code_iter->second == method_offsets.code_offset_)
480             << PrettyMethod(method_idx, dex_file);
481    } else {
482      DCHECK((code_size == 0 && method_offsets.code_offset_ == 0)
483             || offset == method_offsets.code_offset_)
484             << PrettyMethod(method_idx, dex_file);
485      if (!file->WriteFully(&code[0], code_size)) {
486        ReportWriteFailure("method code", method_idx, dex_file, file);
487        return false;
488      }
489      code_offset += code_size;
490    }
491    DCHECK_CODE_OFFSET();
492    frame_size_in_bytes = compiled_method->GetFrameSizeInBytes();
493    core_spill_mask = compiled_method->GetCoreSpillMask();
494    fp_spill_mask = compiled_method->GetFpSpillMask();
495  }
496
497  if (!file->WriteFully(&frame_size_in_bytes, sizeof(frame_size_in_bytes))) {
498    ReportWriteFailure("method frame size", method_idx, dex_file, file);
499    return false;
500  }
501  code_offset += sizeof(frame_size_in_bytes);
502  if (!file->WriteFully(&core_spill_mask, sizeof(core_spill_mask))) {
503    ReportWriteFailure("method core spill mask", method_idx, dex_file, file);
504    return false;
505  }
506  code_offset += sizeof(core_spill_mask);
507  if (!file->WriteFully(&fp_spill_mask, sizeof(fp_spill_mask))) {
508    ReportWriteFailure("method fp spill mask", method_idx, dex_file, file);
509    return false;
510  }
511  code_offset += sizeof(fp_spill_mask);
512
513  if (compiled_method != NULL) {
514    const std::vector<uint32_t>& mapping_table = compiled_method->GetMappingTable();
515    size_t mapping_table_size = mapping_table.size() * sizeof(mapping_table[0]);
516
517    // Deduplicate mapping tables
518    std::map<const std::vector<uint32_t>*, uint32_t>::iterator mapping_iter =
519        mapping_table_offsets_.find(&mapping_table);
520    if (mapping_iter != mapping_table_offsets_.end() &&
521        code_offset != method_offsets.mapping_table_offset_) {
522      DCHECK((mapping_table_size == 0 && method_offsets.mapping_table_offset_ == 0)
523          || mapping_iter->second == method_offsets.mapping_table_offset_)
524          << PrettyMethod(method_idx, dex_file);
525    } else {
526      DCHECK((mapping_table_size == 0 && method_offsets.mapping_table_offset_ == 0)
527          || code_offset == method_offsets.mapping_table_offset_)
528          << PrettyMethod(method_idx, dex_file);
529      if (!file->WriteFully(&mapping_table[0], mapping_table_size)) {
530        ReportWriteFailure("mapping table", method_idx, dex_file, file);
531        return false;
532      }
533      code_offset += mapping_table_size;
534    }
535    DCHECK_CODE_OFFSET();
536
537    const std::vector<uint16_t>& vmap_table = compiled_method->GetVmapTable();
538    size_t vmap_table_size = vmap_table.size() * sizeof(vmap_table[0]);
539
540    // Deduplicate vmap tables
541    std::map<const std::vector<uint16_t>*, uint32_t>::iterator vmap_iter =
542        vmap_table_offsets_.find(&vmap_table);
543    if (vmap_iter != vmap_table_offsets_.end() &&
544        code_offset != method_offsets.vmap_table_offset_) {
545      DCHECK((vmap_table_size == 0 && method_offsets.vmap_table_offset_ == 0)
546          || vmap_iter->second == method_offsets.vmap_table_offset_)
547          << PrettyMethod(method_idx, dex_file);
548    } else {
549      DCHECK((vmap_table_size == 0 && method_offsets.vmap_table_offset_ == 0)
550          || code_offset == method_offsets.vmap_table_offset_)
551          << PrettyMethod(method_idx, dex_file);
552      if (!file->WriteFully(&vmap_table[0], vmap_table_size)) {
553        ReportWriteFailure("vmap table", method_idx, dex_file, file);
554        return false;
555      }
556      code_offset += vmap_table_size;
557    }
558    DCHECK_CODE_OFFSET();
559  }
560  const char* shorty = dex_file.GetMethodShorty(dex_file.GetMethodId(method_idx));
561  const CompiledInvokeStub* compiled_invoke_stub = compiler_->FindInvokeStub(is_static, shorty);
562  if (compiled_invoke_stub != NULL) {
563    uint32_t aligned_code_offset = CompiledMethod::AlignCode(code_offset,
564                                                             compiler_->GetInstructionSet());
565    uint32_t aligned_code_delta = aligned_code_offset - code_offset;
566    if (aligned_code_delta != 0) {
567      off_t new_offset = lseek(file->Fd(), aligned_code_delta, SEEK_CUR);
568      if (static_cast<uint32_t>(new_offset) != aligned_code_offset) {
569        PLOG(ERROR) << "Failed to seek to align invoke stub code. Actual: " << new_offset
570                    << " Expected: " << aligned_code_offset;
571        return false;
572      }
573      code_offset += aligned_code_delta;
574      DCHECK_CODE_OFFSET();
575    }
576    DCHECK_ALIGNED(code_offset, kArmAlignment);
577    const std::vector<uint8_t>& invoke_stub = compiled_invoke_stub->GetCode();
578    size_t invoke_stub_size = invoke_stub.size() * sizeof(invoke_stub[0]);
579
580    // Deduplicate invoke stubs
581    std::map<const std::vector<uint8_t>*, uint32_t>::iterator stub_iter =
582        code_offsets_.find(&invoke_stub);
583    if (stub_iter != code_offsets_.end() &&
584        code_offset != method_offsets.invoke_stub_offset_) {
585      DCHECK((invoke_stub_size == 0 && method_offsets.invoke_stub_offset_ == 0)
586          || stub_iter->second == method_offsets.invoke_stub_offset_)
587          << PrettyMethod(method_idx, dex_file);
588    } else {
589      DCHECK((invoke_stub_size == 0 && method_offsets.invoke_stub_offset_ == 0)
590          || code_offset == method_offsets.invoke_stub_offset_)
591          << PrettyMethod(method_idx, dex_file);
592      if (!file->WriteFully(&invoke_stub[0], invoke_stub_size)) {
593        ReportWriteFailure("invoke stub code", method_idx, dex_file, file);
594        return false;
595      }
596      code_offset += invoke_stub_size;
597    }
598    DCHECK_CODE_OFFSET();
599  }
600  return code_offset;
601}
602
603OatWriter::OatDexFile::OatDexFile(const DexFile& dex_file) {
604  const std::string& location = dex_file.GetLocation();
605  dex_file_location_size_ = location.size();
606  dex_file_location_data_ = reinterpret_cast<const uint8_t*>(location.data());
607  dex_file_checksum_ = dex_file.GetHeader().checksum_;
608  classes_offset_ = 0;
609}
610
611size_t OatWriter::OatDexFile::SizeOf() const {
612  return sizeof(dex_file_location_size_)
613          + dex_file_location_size_
614          + sizeof(dex_file_checksum_)
615          + sizeof(classes_offset_);
616}
617
618void OatWriter::OatDexFile::UpdateChecksum(OatHeader& oat_header) const {
619  oat_header.UpdateChecksum(&dex_file_location_size_, sizeof(dex_file_location_size_));
620  oat_header.UpdateChecksum(dex_file_location_data_, dex_file_location_size_);
621  oat_header.UpdateChecksum(&dex_file_checksum_, sizeof(dex_file_checksum_));
622  oat_header.UpdateChecksum(&classes_offset_, sizeof(classes_offset_));
623}
624
625bool OatWriter::OatDexFile::Write(File* file) const {
626  if (!file->WriteFully(&dex_file_location_size_, sizeof(dex_file_location_size_))) {
627    PLOG(ERROR) << "Failed to write dex file location length to " << file->name();
628    return false;
629  }
630  if (!file->WriteFully(dex_file_location_data_, dex_file_location_size_)) {
631    PLOG(ERROR) << "Failed to write dex file location data to " << file->name();
632    return false;
633  }
634  if (!file->WriteFully(&dex_file_checksum_, sizeof(dex_file_checksum_))) {
635    PLOG(ERROR) << "Failed to write dex file checksum to " << file->name();
636    return false;
637  }
638  if (!file->WriteFully(&classes_offset_, sizeof(classes_offset_))) {
639    PLOG(ERROR) << "Failed to write classes offset to " << file->name();
640    return false;
641  }
642  return true;
643}
644
645OatWriter::OatClasses::OatClasses(const DexFile& dex_file) {
646  methods_offsets_.resize(dex_file.NumClassDefs());
647}
648
649size_t OatWriter::OatClasses::SizeOf() const {
650  return (sizeof(methods_offsets_[0]) * methods_offsets_.size());
651}
652
653void OatWriter::OatClasses::UpdateChecksum(OatHeader& oat_header) const {
654  oat_header.UpdateChecksum(&methods_offsets_[0], SizeOf());
655}
656
657bool OatWriter::OatClasses::Write(File* file) const {
658  if (!file->WriteFully(&methods_offsets_[0], SizeOf())) {
659    PLOG(ERROR) << "Failed to write methods offsets to " << file->name();
660    return false;
661  }
662  return true;
663}
664
665OatWriter::OatMethods::OatMethods(uint32_t methods_count) {
666  method_offsets_.resize(methods_count);
667}
668
669size_t OatWriter::OatMethods::SizeOf() const {
670  return (sizeof(method_offsets_[0]) * method_offsets_.size());
671}
672
673void OatWriter::OatMethods::UpdateChecksum(OatHeader& oat_header) const {
674  oat_header.UpdateChecksum(&method_offsets_[0], SizeOf());
675}
676
677bool OatWriter::OatMethods::Write(File* file) const {
678  if (!file->WriteFully(&method_offsets_[0], SizeOf())) {
679    PLOG(ERROR) << "Failed to write method offsets to " << file->name();
680    return false;
681  }
682  return true;
683}
684
685}  // namespace art
686