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
19#include "driver/compiled_method_storage.h"
20#include "driver/compiler_driver.h"
21#include "utils/swap_space.h"
22
23namespace art {
24
25CompiledCode::CompiledCode(CompilerDriver* compiler_driver,
26                           InstructionSet instruction_set,
27                           const ArrayRef<const uint8_t>& quick_code)
28    : compiler_driver_(compiler_driver),
29      quick_code_(compiler_driver_->GetCompiledMethodStorage()->DeduplicateCode(quick_code)),
30      packed_fields_(InstructionSetField::Encode(instruction_set)) {
31}
32
33CompiledCode::~CompiledCode() {
34  compiler_driver_->GetCompiledMethodStorage()->ReleaseCode(quick_code_);
35}
36
37bool CompiledCode::operator==(const CompiledCode& rhs) const {
38  if (quick_code_ != nullptr) {
39    if (rhs.quick_code_ == nullptr) {
40      return false;
41    } else if (quick_code_->size() != rhs.quick_code_->size()) {
42      return false;
43    } else {
44      return std::equal(quick_code_->begin(), quick_code_->end(), rhs.quick_code_->begin());
45    }
46  }
47  return (rhs.quick_code_ == nullptr);
48}
49
50size_t CompiledCode::AlignCode(size_t offset) const {
51  return AlignCode(offset, GetInstructionSet());
52}
53
54size_t CompiledCode::AlignCode(size_t offset, InstructionSet instruction_set) {
55  return RoundUp(offset, GetInstructionSetAlignment(instruction_set));
56}
57
58size_t CompiledCode::CodeDelta() const {
59  return CodeDelta(GetInstructionSet());
60}
61
62size_t CompiledCode::CodeDelta(InstructionSet instruction_set) {
63  switch (instruction_set) {
64    case InstructionSet::kArm:
65    case InstructionSet::kArm64:
66    case InstructionSet::kMips:
67    case InstructionSet::kMips64:
68    case InstructionSet::kX86:
69    case InstructionSet::kX86_64:
70      return 0;
71    case InstructionSet::kThumb2: {
72      // +1 to set the low-order bit so a BLX will switch to Thumb mode
73      return 1;
74    }
75    default:
76      LOG(FATAL) << "Unknown InstructionSet: " << instruction_set;
77      return 0;
78  }
79}
80
81const void* CompiledCode::CodePointer(const void* code_pointer, InstructionSet instruction_set) {
82  switch (instruction_set) {
83    case InstructionSet::kArm:
84    case InstructionSet::kArm64:
85    case InstructionSet::kMips:
86    case InstructionSet::kMips64:
87    case InstructionSet::kX86:
88    case InstructionSet::kX86_64:
89      return code_pointer;
90    case InstructionSet::kThumb2: {
91      uintptr_t address = reinterpret_cast<uintptr_t>(code_pointer);
92      // Set the low-order bit so a BLX will switch to Thumb mode
93      address |= 0x1;
94      return reinterpret_cast<const void*>(address);
95    }
96    default:
97      LOG(FATAL) << "Unknown InstructionSet: " << instruction_set;
98      return nullptr;
99  }
100}
101
102CompiledMethod::CompiledMethod(CompilerDriver* driver,
103                               InstructionSet instruction_set,
104                               const ArrayRef<const uint8_t>& quick_code,
105                               const size_t frame_size_in_bytes,
106                               const uint32_t core_spill_mask,
107                               const uint32_t fp_spill_mask,
108                               const ArrayRef<const uint8_t>& method_info,
109                               const ArrayRef<const uint8_t>& vmap_table,
110                               const ArrayRef<const uint8_t>& cfi_info,
111                               const ArrayRef<const linker::LinkerPatch>& patches)
112    : CompiledCode(driver, instruction_set, quick_code),
113      frame_size_in_bytes_(frame_size_in_bytes),
114      core_spill_mask_(core_spill_mask),
115      fp_spill_mask_(fp_spill_mask),
116      method_info_(driver->GetCompiledMethodStorage()->DeduplicateMethodInfo(method_info)),
117      vmap_table_(driver->GetCompiledMethodStorage()->DeduplicateVMapTable(vmap_table)),
118      cfi_info_(driver->GetCompiledMethodStorage()->DeduplicateCFIInfo(cfi_info)),
119      patches_(driver->GetCompiledMethodStorage()->DeduplicateLinkerPatches(patches)) {
120}
121
122CompiledMethod* CompiledMethod::SwapAllocCompiledMethod(
123    CompilerDriver* driver,
124    InstructionSet instruction_set,
125    const ArrayRef<const uint8_t>& quick_code,
126    const size_t frame_size_in_bytes,
127    const uint32_t core_spill_mask,
128    const uint32_t fp_spill_mask,
129    const ArrayRef<const uint8_t>& method_info,
130    const ArrayRef<const uint8_t>& vmap_table,
131    const ArrayRef<const uint8_t>& cfi_info,
132    const ArrayRef<const linker::LinkerPatch>& patches) {
133  SwapAllocator<CompiledMethod> alloc(driver->GetCompiledMethodStorage()->GetSwapSpaceAllocator());
134  CompiledMethod* ret = alloc.allocate(1);
135  alloc.construct(ret,
136                  driver,
137                  instruction_set,
138                  quick_code,
139                  frame_size_in_bytes,
140                  core_spill_mask,
141                  fp_spill_mask,
142                  method_info,
143                  vmap_table,
144                  cfi_info, patches);
145  return ret;
146}
147
148void CompiledMethod::ReleaseSwapAllocatedCompiledMethod(CompilerDriver* driver, CompiledMethod* m) {
149  SwapAllocator<CompiledMethod> alloc(driver->GetCompiledMethodStorage()->GetSwapSpaceAllocator());
150  alloc.destroy(m);
151  alloc.deallocate(m, 1);
152}
153
154CompiledMethod::~CompiledMethod() {
155  CompiledMethodStorage* storage = GetCompilerDriver()->GetCompiledMethodStorage();
156  storage->ReleaseLinkerPatches(patches_);
157  storage->ReleaseCFIInfo(cfi_info_);
158  storage->ReleaseVMapTable(vmap_table_);
159  storage->ReleaseMethodInfo(method_info_);
160}
161
162}  // namespace art
163