compiled_method.cc revision b95a5345ae4217b70ca36f0cced92f68dda7caf5 
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 "compiled_method.h"
18#include "driver/compiler_driver.h"
19
20namespace art {
21
22CompiledCode::CompiledCode(CompilerDriver* compiler_driver, InstructionSet instruction_set,
23                           const std::vector<uint8_t>& quick_code)
24    : compiler_driver_(compiler_driver), instruction_set_(instruction_set),
25      portable_code_(nullptr), quick_code_(nullptr) {
26  SetCode(&quick_code, nullptr);
27}
28
29CompiledCode::CompiledCode(CompilerDriver* compiler_driver, InstructionSet instruction_set,
30                           const std::string& elf_object, const std::string& symbol)
31    : compiler_driver_(compiler_driver), instruction_set_(instruction_set),
32      portable_code_(nullptr), quick_code_(nullptr), symbol_(symbol) {
33  CHECK_NE(elf_object.size(), 0U);
34  CHECK_NE(symbol.size(), 0U);
35  std::vector<uint8_t> temp_code(elf_object.size());
36  for (size_t i = 0; i < elf_object.size(); ++i) {
37    temp_code[i] = elf_object[i];
38  }
39  // TODO: we shouldn't just shove ELF objects in as "code" but
40  // change to have different kinds of compiled methods.  This is
41  // being deferred until we work on hybrid execution or at least
42  // until we work on batch compilation.
43  SetCode(nullptr, &temp_code);
44}
45
46void CompiledCode::SetCode(const std::vector<uint8_t>* quick_code,
47                           const std::vector<uint8_t>* portable_code) {
48  if (portable_code != nullptr) {
49    CHECK(!portable_code->empty());
50    portable_code_ = compiler_driver_->DeduplicateCode(*portable_code);
51  }
52  if (quick_code != nullptr) {
53    CHECK(!quick_code->empty());
54    quick_code_ = compiler_driver_->DeduplicateCode(*quick_code);
55  }
56}
57
58bool CompiledCode::operator==(const CompiledCode& rhs) const {
59  if (quick_code_ != nullptr) {
60    if (rhs.quick_code_ == nullptr) {
61      return false;
62    } else if (quick_code_->size() != rhs.quick_code_->size()) {
63      return false;
64    } else {
65      return std::equal(quick_code_->begin(), quick_code_->end(), rhs.quick_code_->begin());
66    }
67  } else if (portable_code_ != nullptr) {
68    if (rhs.portable_code_ == nullptr) {
69      return false;
70    } else if (portable_code_->size() != rhs.portable_code_->size()) {
71      return false;
72    } else {
73      return std::equal(portable_code_->begin(), portable_code_->end(),
74                        rhs.portable_code_->begin());
75    }
76  }
77  return (rhs.quick_code_ == nullptr) && (rhs.portable_code_ == nullptr);
78}
79
80uint32_t CompiledCode::AlignCode(uint32_t offset) const {
81  return AlignCode(offset, instruction_set_);
82}
83
84uint32_t CompiledCode::AlignCode(uint32_t offset, InstructionSet instruction_set) {
85  switch (instruction_set) {
86    case kArm:
87    case kThumb2:
88      return RoundUp(offset, kArmAlignment);
89    case kArm64:
90      return RoundUp(offset, kArm64Alignment);
91    case kMips:
92      return RoundUp(offset, kMipsAlignment);
93    case kX86:  // Fall-through.
94    case kX86_64:
95      return RoundUp(offset, kX86Alignment);
96    default:
97      LOG(FATAL) << "Unknown InstructionSet: " << instruction_set;
98      return 0;
99  }
100}
101
102size_t CompiledCode::CodeDelta() const {
103  switch (instruction_set_) {
104    case kArm:
105    case kArm64:
106    case kMips:
107    case kX86:
108      return 0;
109    case kThumb2: {
110      // +1 to set the low-order bit so a BLX will switch to Thumb mode
111      return 1;
112    }
113    default:
114      LOG(FATAL) << "Unknown InstructionSet: " << instruction_set_;
115      return 0;
116  }
117}
118
119const void* CompiledCode::CodePointer(const void* code_pointer,
120                                      InstructionSet instruction_set) {
121  switch (instruction_set) {
122    case kArm:
123    case kArm64:
124    case kMips:
125    case kX86:
126      return code_pointer;
127    case kThumb2: {
128      uintptr_t address = reinterpret_cast<uintptr_t>(code_pointer);
129      // Set the low-order bit so a BLX will switch to Thumb mode
130      address |= 0x1;
131      return reinterpret_cast<const void*>(address);
132    }
133    default:
134      LOG(FATAL) << "Unknown InstructionSet: " << instruction_set;
135      return NULL;
136  }
137}
138
139const std::string& CompiledCode::GetSymbol() const {
140  CHECK_NE(0U, symbol_.size());
141  return symbol_;
142}
143
144const std::vector<uint32_t>& CompiledCode::GetOatdataOffsetsToCompliledCodeOffset() const {
145  CHECK_NE(0U, oatdata_offsets_to_compiled_code_offset_.size()) << symbol_;
146  return oatdata_offsets_to_compiled_code_offset_;
147}
148
149void CompiledCode::AddOatdataOffsetToCompliledCodeOffset(uint32_t offset) {
150  oatdata_offsets_to_compiled_code_offset_.push_back(offset);
151}
152
153CompiledMethod::CompiledMethod(CompilerDriver& driver,
154                               InstructionSet instruction_set,
155                               const std::vector<uint8_t>& quick_code,
156                               const size_t frame_size_in_bytes,
157                               const uint32_t core_spill_mask,
158                               const uint32_t fp_spill_mask,
159                               const std::vector<uint8_t>& mapping_table,
160                               const std::vector<uint8_t>& vmap_table,
161                               const std::vector<uint8_t>& native_gc_map,
162                               const std::vector<uint8_t>* cfi_info)
163    : CompiledCode(&driver, instruction_set, quick_code), frame_size_in_bytes_(frame_size_in_bytes),
164      core_spill_mask_(core_spill_mask), fp_spill_mask_(fp_spill_mask),
165  mapping_table_(driver.DeduplicateMappingTable(mapping_table)),
166  vmap_table_(driver.DeduplicateVMapTable(vmap_table)),
167  gc_map_(driver.DeduplicateGCMap(native_gc_map)),
168  cfi_info_(driver.DeduplicateCFIInfo(cfi_info)) {
169}
170
171CompiledMethod::CompiledMethod(CompilerDriver& driver,
172                               InstructionSet instruction_set,
173                               const std::vector<uint8_t>& code,
174                               const size_t frame_size_in_bytes,
175                               const uint32_t core_spill_mask,
176                               const uint32_t fp_spill_mask)
177    : CompiledCode(&driver, instruction_set, code),
178      frame_size_in_bytes_(frame_size_in_bytes),
179      core_spill_mask_(core_spill_mask), fp_spill_mask_(fp_spill_mask),
180      mapping_table_(driver.DeduplicateMappingTable(std::vector<uint8_t>())),
181      vmap_table_(driver.DeduplicateVMapTable(std::vector<uint8_t>())),
182      gc_map_(driver.DeduplicateGCMap(std::vector<uint8_t>())),
183      cfi_info_(nullptr) {
184}
185
186// Constructs a CompiledMethod for the Portable compiler.
187CompiledMethod::CompiledMethod(CompilerDriver& driver, InstructionSet instruction_set,
188                               const std::string& code, const std::vector<uint8_t>& gc_map,
189                               const std::string& symbol)
190    : CompiledCode(&driver, instruction_set, code, symbol),
191      frame_size_in_bytes_(kStackAlignment), core_spill_mask_(0),
192      fp_spill_mask_(0), gc_map_(driver.DeduplicateGCMap(gc_map)) {
193  mapping_table_ = driver.DeduplicateMappingTable(std::vector<uint8_t>());
194  vmap_table_ = driver.DeduplicateVMapTable(std::vector<uint8_t>());
195}
196
197CompiledMethod::CompiledMethod(CompilerDriver& driver, InstructionSet instruction_set,
198                               const std::string& code, const std::string& symbol)
199    : CompiledCode(&driver, instruction_set, code, symbol),
200      frame_size_in_bytes_(kStackAlignment), core_spill_mask_(0),
201      fp_spill_mask_(0) {
202  mapping_table_ = driver.DeduplicateMappingTable(std::vector<uint8_t>());
203  vmap_table_ = driver.DeduplicateVMapTable(std::vector<uint8_t>());
204  gc_map_ = driver.DeduplicateGCMap(std::vector<uint8_t>());
205}
206
207}  // namespace art
208