/*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "compiler_options.h"
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#include <fstream>
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#include <string_view>
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#include "android-base/stringprintf.h"
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#include "android-base/strings.h"
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#include "arch/instruction_set.h"
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#include "arch/instruction_set_features.h"
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#include "base/runtime_debug.h"
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#include "base/variant_map.h"
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#include "class_linker.h"
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#include "cmdline_parser.h"
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#include "compiler_options_map-inl.h"
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#include "dex/dex_file-inl.h"
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#include "dex/verification_results.h"
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#include "dex/verified_method.h"
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#include "runtime.h"
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#include "scoped_thread_state_change-inl.h"
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#include "simple_compiler_options_map.h"
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namespace art {
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CompilerOptions::CompilerOptions()
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: compiler_filter_(CompilerFilter::kDefaultCompilerFilter),
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huge_method_threshold_(kDefaultHugeMethodThreshold),
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large_method_threshold_(kDefaultLargeMethodThreshold),
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small_method_threshold_(kDefaultSmallMethodThreshold),
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tiny_method_threshold_(kDefaultTinyMethodThreshold),
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num_dex_methods_threshold_(kDefaultNumDexMethodsThreshold),
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inline_max_code_units_(kUnsetInlineMaxCodeUnits),
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instruction_set_(kRuntimeISA == InstructionSet::kArm ? InstructionSet::kThumb2 : kRuntimeISA),
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instruction_set_features_(nullptr),
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no_inline_from_(),
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dex_files_for_oat_file_(),
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image_classes_(),
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verification_results_(nullptr),
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image_type_(ImageType::kNone),
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compiling_with_core_image_(false),
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baseline_(false),
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debuggable_(false),
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generate_debug_info_(kDefaultGenerateDebugInfo),
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generate_mini_debug_info_(kDefaultGenerateMiniDebugInfo),
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generate_build_id_(false),
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implicit_null_checks_(true),
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implicit_so_checks_(true),
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implicit_suspend_checks_(false),
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compile_pic_(false),
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dump_timings_(false),
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dump_pass_timings_(false),
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dump_stats_(false),
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top_k_profile_threshold_(kDefaultTopKProfileThreshold),
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profile_compilation_info_(nullptr),
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verbose_methods_(),
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abort_on_hard_verifier_failure_(false),
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abort_on_soft_verifier_failure_(false),
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init_failure_output_(nullptr),
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dump_cfg_file_name_(""),
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dump_cfg_append_(false),
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force_determinism_(false),
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deduplicate_code_(true),
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count_hotness_in_compiled_code_(false),
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resolve_startup_const_strings_(false),
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check_profiled_methods_(ProfileMethodsCheck::kNone),
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max_image_block_size_(std::numeric_limits<uint32_t>::max()),
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register_allocation_strategy_(RegisterAllocator::kRegisterAllocatorDefault),
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passes_to_run_(nullptr) {
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}
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CompilerOptions::~CompilerOptions() {
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// Everything done by member destructors.
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// The definitions of classes forward-declared in the header have now been #included.
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}
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namespace {
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bool kEmitRuntimeReadBarrierChecks = kIsDebugBuild &&
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RegisterRuntimeDebugFlag(&kEmitRuntimeReadBarrierChecks);
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} // namespace
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bool CompilerOptions::EmitRunTimeChecksInDebugMode() const {
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// Run-time checks (e.g. Marking Register checks) are only emitted in slow-debug mode.
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return kEmitRuntimeReadBarrierChecks;
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}
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bool CompilerOptions::ParseDumpInitFailures(const std::string& option, std::string* error_msg) {
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init_failure_output_.reset(new std::ofstream(option));
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if (init_failure_output_.get() == nullptr) {
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*error_msg = "Failed to construct std::ofstream";
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return false;
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} else if (init_failure_output_->fail()) {
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*error_msg = android::base::StringPrintf(
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"Failed to open %s for writing the initialization failures.", option.c_str());
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init_failure_output_.reset();
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return false;
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}
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return true;
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}
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bool CompilerOptions::ParseRegisterAllocationStrategy(const std::string& option,
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std::string* error_msg) {
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if (option == "linear-scan") {
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register_allocation_strategy_ = RegisterAllocator::Strategy::kRegisterAllocatorLinearScan;
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} else if (option == "graph-color") {
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register_allocation_strategy_ = RegisterAllocator::Strategy::kRegisterAllocatorGraphColor;
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} else {
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*error_msg = "Unrecognized register allocation strategy. Try linear-scan, or graph-color.";
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return false;
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}
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return true;
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}
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bool CompilerOptions::ParseCompilerOptions(const std::vector<std::string>& options,
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bool ignore_unrecognized,
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std::string* error_msg) {
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auto parser = CreateSimpleParser(ignore_unrecognized);
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CmdlineResult parse_result = parser.Parse(options);
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if (!parse_result.IsSuccess()) {
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*error_msg = parse_result.GetMessage();
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return false;
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}
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SimpleParseArgumentMap args = parser.ReleaseArgumentsMap();
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return ReadCompilerOptions(args, this, error_msg);
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}
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bool CompilerOptions::IsImageClass(const char* descriptor) const {
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// Historical note: We used to hold the set indirectly and there was a distinction between an
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// empty set and a null, null meaning to include all classes. However, the distiction has been
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// removed; if we don't have a profile, we treat it as an empty set of classes. b/77340429
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return image_classes_.find(std::string_view(descriptor)) != image_classes_.end();
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}
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const VerificationResults* CompilerOptions::GetVerificationResults() const {
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DCHECK(Runtime::Current()->IsAotCompiler());
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return verification_results_;
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}
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const VerifiedMethod* CompilerOptions::GetVerifiedMethod(const DexFile* dex_file,
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uint32_t method_idx) const {
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MethodReference ref(dex_file, method_idx);
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return verification_results_->GetVerifiedMethod(ref);
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}
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bool CompilerOptions::IsMethodVerifiedWithoutFailures(uint32_t method_idx,
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uint16_t class_def_idx,
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const DexFile& dex_file) const {
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const VerifiedMethod* verified_method = GetVerifiedMethod(&dex_file, method_idx);
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if (verified_method != nullptr) {
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return !verified_method->HasVerificationFailures();
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}
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// If we can't find verification metadata, check if this is a system class (we trust that system
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// classes have their methods verified). If it's not, be conservative and assume the method
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// has not been verified successfully.
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// TODO: When compiling the boot image it should be safe to assume that everything is verified,
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// even if methods are not found in the verification cache.
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const char* descriptor = dex_file.GetClassDescriptor(dex_file.GetClassDef(class_def_idx));
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ClassLinker* class_linker = Runtime::Current()->GetClassLinker();
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Thread* self = Thread::Current();
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ScopedObjectAccess soa(self);
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bool is_system_class = class_linker->FindSystemClass(self, descriptor) != nullptr;
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if (!is_system_class) {
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self->ClearException();
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}
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return is_system_class;
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}
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bool CompilerOptions::IsCoreImageFilename(const std::string& boot_image_filename) {
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// Look for "core.art" or "core-*.art".
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if (android::base::EndsWith(boot_image_filename, "core.art")) {
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return true;
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}
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if (!android::base::EndsWith(boot_image_filename, ".art")) {
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return false;
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}
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size_t slash_pos = boot_image_filename.rfind('/');
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if (slash_pos == std::string::npos) {
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return android::base::StartsWith(boot_image_filename, "core-");
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}
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return boot_image_filename.compare(slash_pos + 1, 5u, "core-") == 0;
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}
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} // namespace art
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