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  return RoundUp(offset, GetInstructionSetAlignment(instruction_set));
86}
87
88size_t CompiledCode::CodeDelta() const {
89  return CodeDelta(instruction_set_);
90}
91
92size_t CompiledCode::CodeDelta(InstructionSet instruction_set) {
93  switch (instruction_set) {
94    case kArm:
95    case kArm64:
96    case kMips:
97    case kX86:
98    case kX86_64:
99      return 0;
100    case kThumb2: {
101      // +1 to set the low-order bit so a BLX will switch to Thumb mode
102      return 1;
103    }
104    default:
105      LOG(FATAL) << "Unknown InstructionSet: " << instruction_set;
106      return 0;
107  }
108}
109
110const void* CompiledCode::CodePointer(const void* code_pointer,
111                                      InstructionSet instruction_set) {
112  switch (instruction_set) {
113    case kArm:
114    case kArm64:
115    case kMips:
116    case kX86:
117    case kX86_64:
118      return code_pointer;
119    case kThumb2: {
120      uintptr_t address = reinterpret_cast<uintptr_t>(code_pointer);
121      // Set the low-order bit so a BLX will switch to Thumb mode
122      address |= 0x1;
123      return reinterpret_cast<const void*>(address);
124    }
125    default:
126      LOG(FATAL) << "Unknown InstructionSet: " << instruction_set;
127      return NULL;
128  }
129}
130
131const std::string& CompiledCode::GetSymbol() const {
132  CHECK_NE(0U, symbol_.size());
133  return symbol_;
134}
135
136const std::vector<uint32_t>& CompiledCode::GetOatdataOffsetsToCompliledCodeOffset() const {
137  CHECK_NE(0U, oatdata_offsets_to_compiled_code_offset_.size()) << symbol_;
138  return oatdata_offsets_to_compiled_code_offset_;
139}
140
141void CompiledCode::AddOatdataOffsetToCompliledCodeOffset(uint32_t offset) {
142  oatdata_offsets_to_compiled_code_offset_.push_back(offset);
143}
144
145CompiledMethod::CompiledMethod(CompilerDriver* driver,
146                               InstructionSet instruction_set,
147                               const std::vector<uint8_t>& quick_code,
148                               const size_t frame_size_in_bytes,
149                               const uint32_t core_spill_mask,
150                               const uint32_t fp_spill_mask,
151                               const std::vector<uint8_t>& mapping_table,
152                               const std::vector<uint8_t>& vmap_table,
153                               const std::vector<uint8_t>& native_gc_map,
154                               const std::vector<uint8_t>* cfi_info)
155    : CompiledCode(driver, instruction_set, quick_code), frame_size_in_bytes_(frame_size_in_bytes),
156      core_spill_mask_(core_spill_mask), fp_spill_mask_(fp_spill_mask),
157  mapping_table_(driver->DeduplicateMappingTable(mapping_table)),
158  vmap_table_(driver->DeduplicateVMapTable(vmap_table)),
159  gc_map_(driver->DeduplicateGCMap(native_gc_map)),
160  cfi_info_(driver->DeduplicateCFIInfo(cfi_info)) {
161}
162
163CompiledMethod::CompiledMethod(CompilerDriver* driver,
164                               InstructionSet instruction_set,
165                               const std::vector<uint8_t>& code,
166                               const size_t frame_size_in_bytes,
167                               const uint32_t core_spill_mask,
168                               const uint32_t fp_spill_mask)
169    : CompiledCode(driver, instruction_set, code),
170      frame_size_in_bytes_(frame_size_in_bytes),
171      core_spill_mask_(core_spill_mask), fp_spill_mask_(fp_spill_mask),
172      mapping_table_(driver->DeduplicateMappingTable(std::vector<uint8_t>())),
173      vmap_table_(driver->DeduplicateVMapTable(std::vector<uint8_t>())),
174      gc_map_(driver->DeduplicateGCMap(std::vector<uint8_t>())),
175      cfi_info_(nullptr) {
176}
177
178// Constructs a CompiledMethod for the Portable compiler.
179CompiledMethod::CompiledMethod(CompilerDriver* driver, InstructionSet instruction_set,
180                               const std::string& code, const std::vector<uint8_t>& gc_map,
181                               const std::string& symbol)
182    : CompiledCode(driver, instruction_set, code, symbol),
183      frame_size_in_bytes_(kStackAlignment), core_spill_mask_(0),
184      fp_spill_mask_(0), gc_map_(driver->DeduplicateGCMap(gc_map)) {
185  mapping_table_ = driver->DeduplicateMappingTable(std::vector<uint8_t>());
186  vmap_table_ = driver->DeduplicateVMapTable(std::vector<uint8_t>());
187}
188
189CompiledMethod::CompiledMethod(CompilerDriver* driver, InstructionSet instruction_set,
190                               const std::string& code, const std::string& symbol)
191    : CompiledCode(driver, instruction_set, code, symbol),
192      frame_size_in_bytes_(kStackAlignment), core_spill_mask_(0),
193      fp_spill_mask_(0) {
194  mapping_table_ = driver->DeduplicateMappingTable(std::vector<uint8_t>());
195  vmap_table_ = driver->DeduplicateVMapTable(std::vector<uint8_t>());
196  gc_map_ = driver->DeduplicateGCMap(std::vector<uint8_t>());
197}
198
199}  // namespace art
200