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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 
20 namespace art {
21 
CompiledCode(CompilerDriver * compiler_driver,InstructionSet instruction_set,const std::vector<uint8_t> & quick_code)22 CompiledCode::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 
CompiledCode(CompilerDriver * compiler_driver,InstructionSet instruction_set,const std::string & elf_object,const std::string & symbol)29 CompiledCode::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 
SetCode(const std::vector<uint8_t> * quick_code,const std::vector<uint8_t> * portable_code)46 void 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 
operator ==(const CompiledCode & rhs) const58 bool 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 
AlignCode(uint32_t offset) const80 uint32_t CompiledCode::AlignCode(uint32_t offset) const {
81   return AlignCode(offset, instruction_set_);
82 }
83 
AlignCode(uint32_t offset,InstructionSet instruction_set)84 uint32_t CompiledCode::AlignCode(uint32_t offset, InstructionSet instruction_set) {
85   return RoundUp(offset, GetInstructionSetAlignment(instruction_set));
86 }
87 
CodeDelta() const88 size_t CompiledCode::CodeDelta() const {
89   return CodeDelta(instruction_set_);
90 }
91 
CodeDelta(InstructionSet instruction_set)92 size_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 
CodePointer(const void * code_pointer,InstructionSet instruction_set)110 const 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 
GetSymbol() const131 const std::string& CompiledCode::GetSymbol() const {
132   CHECK_NE(0U, symbol_.size());
133   return symbol_;
134 }
135 
GetOatdataOffsetsToCompliledCodeOffset() const136 const 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 
AddOatdataOffsetToCompliledCodeOffset(uint32_t offset)141 void CompiledCode::AddOatdataOffsetToCompliledCodeOffset(uint32_t offset) {
142   oatdata_offsets_to_compiled_code_offset_.push_back(offset);
143 }
144 
CompiledMethod(CompilerDriver * driver,InstructionSet instruction_set,const std::vector<uint8_t> & quick_code,const size_t frame_size_in_bytes,const uint32_t core_spill_mask,const uint32_t fp_spill_mask,const std::vector<uint8_t> & mapping_table,const std::vector<uint8_t> & vmap_table,const std::vector<uint8_t> & native_gc_map,const std::vector<uint8_t> * cfi_info)145 CompiledMethod::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 
CompiledMethod(CompilerDriver * driver,InstructionSet instruction_set,const std::vector<uint8_t> & code,const size_t frame_size_in_bytes,const uint32_t core_spill_mask,const uint32_t fp_spill_mask)163 CompiledMethod::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.
CompiledMethod(CompilerDriver * driver,InstructionSet instruction_set,const std::string & code,const std::vector<uint8_t> & gc_map,const std::string & symbol)179 CompiledMethod::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 
CompiledMethod(CompilerDriver * driver,InstructionSet instruction_set,const std::string & code,const std::string & symbol)189 CompiledMethod::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