775 lines
28 KiB
C++
775 lines
28 KiB
C++
/*
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* Copyright 2014 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 "jit.h"
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#include <dlfcn.h>
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#include "art_method-inl.h"
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#include "base/enums.h"
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#include "base/logging.h"
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#include "base/memory_tool.h"
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#include "debugger.h"
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#include "entrypoints/runtime_asm_entrypoints.h"
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#include "interpreter/interpreter.h"
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#include "java_vm_ext.h"
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#include "jit_code_cache.h"
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#include "oat_file_manager.h"
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#include "oat_quick_method_header.h"
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#include "profile_compilation_info.h"
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#include "profile_saver.h"
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#include "runtime.h"
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#include "runtime_options.h"
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#include "stack.h"
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#include "stack_map.h"
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#include "thread-inl.h"
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#include "thread_list.h"
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#include "utils.h"
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namespace art {
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namespace jit {
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static constexpr bool kEnableOnStackReplacement = true;
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// At what priority to schedule jit threads. 9 is the lowest foreground priority on device.
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static constexpr int kJitPoolThreadPthreadPriority = 9;
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// Different compilation threshold constants. These can be overridden on the command line.
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static constexpr size_t kJitDefaultCompileThreshold = 10000; // Non-debug default.
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static constexpr size_t kJitStressDefaultCompileThreshold = 100; // Fast-debug build.
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static constexpr size_t kJitSlowStressDefaultCompileThreshold = 2; // Slow-debug build.
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// JIT compiler
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void* Jit::jit_library_handle_= nullptr;
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void* Jit::jit_compiler_handle_ = nullptr;
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void* (*Jit::jit_load_)(bool*) = nullptr;
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void (*Jit::jit_unload_)(void*) = nullptr;
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bool (*Jit::jit_compile_method_)(void*, ArtMethod*, Thread*, bool) = nullptr;
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void (*Jit::jit_types_loaded_)(void*, mirror::Class**, size_t count) = nullptr;
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bool Jit::generate_debug_info_ = false;
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struct StressModeHelper {
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DECLARE_RUNTIME_DEBUG_FLAG(kSlowMode);
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};
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DEFINE_RUNTIME_DEBUG_FLAG(StressModeHelper, kSlowMode);
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JitOptions* JitOptions::CreateFromRuntimeArguments(const RuntimeArgumentMap& options) {
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auto* jit_options = new JitOptions;
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jit_options->use_jit_compilation_ = options.GetOrDefault(RuntimeArgumentMap::UseJitCompilation);
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jit_options->code_cache_initial_capacity_ =
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options.GetOrDefault(RuntimeArgumentMap::JITCodeCacheInitialCapacity);
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jit_options->code_cache_max_capacity_ =
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options.GetOrDefault(RuntimeArgumentMap::JITCodeCacheMaxCapacity);
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jit_options->dump_info_on_shutdown_ =
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options.Exists(RuntimeArgumentMap::DumpJITInfoOnShutdown);
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jit_options->profile_saver_options_ =
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options.GetOrDefault(RuntimeArgumentMap::ProfileSaverOpts);
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if (options.Exists(RuntimeArgumentMap::JITCompileThreshold)) {
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jit_options->compile_threshold_ = *options.Get(RuntimeArgumentMap::JITCompileThreshold);
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} else {
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jit_options->compile_threshold_ =
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kIsDebugBuild
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? (StressModeHelper::kSlowMode
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? kJitSlowStressDefaultCompileThreshold
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: kJitStressDefaultCompileThreshold)
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: kJitDefaultCompileThreshold;
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}
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if (jit_options->compile_threshold_ > std::numeric_limits<uint16_t>::max()) {
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LOG(FATAL) << "Method compilation threshold is above its internal limit.";
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}
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if (options.Exists(RuntimeArgumentMap::JITWarmupThreshold)) {
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jit_options->warmup_threshold_ = *options.Get(RuntimeArgumentMap::JITWarmupThreshold);
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if (jit_options->warmup_threshold_ > std::numeric_limits<uint16_t>::max()) {
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LOG(FATAL) << "Method warmup threshold is above its internal limit.";
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}
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} else {
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jit_options->warmup_threshold_ = jit_options->compile_threshold_ / 2;
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}
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if (options.Exists(RuntimeArgumentMap::JITOsrThreshold)) {
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jit_options->osr_threshold_ = *options.Get(RuntimeArgumentMap::JITOsrThreshold);
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if (jit_options->osr_threshold_ > std::numeric_limits<uint16_t>::max()) {
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LOG(FATAL) << "Method on stack replacement threshold is above its internal limit.";
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}
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} else {
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jit_options->osr_threshold_ = jit_options->compile_threshold_ * 2;
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if (jit_options->osr_threshold_ > std::numeric_limits<uint16_t>::max()) {
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jit_options->osr_threshold_ = std::numeric_limits<uint16_t>::max();
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}
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}
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if (options.Exists(RuntimeArgumentMap::JITPriorityThreadWeight)) {
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jit_options->priority_thread_weight_ =
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*options.Get(RuntimeArgumentMap::JITPriorityThreadWeight);
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if (jit_options->priority_thread_weight_ > jit_options->warmup_threshold_) {
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LOG(FATAL) << "Priority thread weight is above the warmup threshold.";
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} else if (jit_options->priority_thread_weight_ == 0) {
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LOG(FATAL) << "Priority thread weight cannot be 0.";
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}
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} else {
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jit_options->priority_thread_weight_ = std::max(
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jit_options->warmup_threshold_ / Jit::kDefaultPriorityThreadWeightRatio,
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static_cast<size_t>(1));
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}
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if (options.Exists(RuntimeArgumentMap::JITInvokeTransitionWeight)) {
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jit_options->invoke_transition_weight_ =
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*options.Get(RuntimeArgumentMap::JITInvokeTransitionWeight);
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if (jit_options->invoke_transition_weight_ > jit_options->warmup_threshold_) {
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LOG(FATAL) << "Invoke transition weight is above the warmup threshold.";
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} else if (jit_options->invoke_transition_weight_ == 0) {
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LOG(FATAL) << "Invoke transition weight cannot be 0.";
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}
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} else {
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jit_options->invoke_transition_weight_ = std::max(
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jit_options->warmup_threshold_ / Jit::kDefaultInvokeTransitionWeightRatio,
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static_cast<size_t>(1));
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}
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return jit_options;
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}
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bool Jit::ShouldUsePriorityThreadWeight() {
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return Runtime::Current()->InJankPerceptibleProcessState()
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&& Thread::Current()->IsJitSensitiveThread();
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}
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void Jit::DumpInfo(std::ostream& os) {
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code_cache_->Dump(os);
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cumulative_timings_.Dump(os);
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MutexLock mu(Thread::Current(), lock_);
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memory_use_.PrintMemoryUse(os);
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}
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void Jit::DumpForSigQuit(std::ostream& os) {
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DumpInfo(os);
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ProfileSaver::DumpInstanceInfo(os);
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}
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void Jit::AddTimingLogger(const TimingLogger& logger) {
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cumulative_timings_.AddLogger(logger);
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}
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Jit::Jit() : dump_info_on_shutdown_(false),
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cumulative_timings_("JIT timings"),
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memory_use_("Memory used for compilation", 16),
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lock_("JIT memory use lock"),
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use_jit_compilation_(true),
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hot_method_threshold_(0),
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warm_method_threshold_(0),
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osr_method_threshold_(0),
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priority_thread_weight_(0),
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invoke_transition_weight_(0) {}
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Jit* Jit::Create(JitOptions* options, std::string* error_msg) {
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DCHECK(options->UseJitCompilation() || options->GetProfileSaverOptions().IsEnabled());
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std::unique_ptr<Jit> jit(new Jit);
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jit->dump_info_on_shutdown_ = options->DumpJitInfoOnShutdown();
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if (jit_compiler_handle_ == nullptr && !LoadCompiler(error_msg)) {
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return nullptr;
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}
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jit->code_cache_.reset(JitCodeCache::Create(
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options->GetCodeCacheInitialCapacity(),
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options->GetCodeCacheMaxCapacity(),
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jit->generate_debug_info_,
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error_msg));
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if (jit->GetCodeCache() == nullptr) {
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return nullptr;
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}
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jit->use_jit_compilation_ = options->UseJitCompilation();
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jit->profile_saver_options_ = options->GetProfileSaverOptions();
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VLOG(jit) << "JIT created with initial_capacity="
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<< PrettySize(options->GetCodeCacheInitialCapacity())
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<< ", max_capacity=" << PrettySize(options->GetCodeCacheMaxCapacity())
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<< ", compile_threshold=" << options->GetCompileThreshold()
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<< ", profile_saver_options=" << options->GetProfileSaverOptions();
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jit->hot_method_threshold_ = options->GetCompileThreshold();
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jit->warm_method_threshold_ = options->GetWarmupThreshold();
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jit->osr_method_threshold_ = options->GetOsrThreshold();
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jit->priority_thread_weight_ = options->GetPriorityThreadWeight();
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jit->invoke_transition_weight_ = options->GetInvokeTransitionWeight();
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jit->CreateThreadPool();
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// Notify native debugger about the classes already loaded before the creation of the jit.
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jit->DumpTypeInfoForLoadedTypes(Runtime::Current()->GetClassLinker());
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return jit.release();
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}
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bool Jit::LoadCompilerLibrary(std::string* error_msg) {
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jit_library_handle_ = dlopen(
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kIsDebugBuild ? "libartd-compiler.so" : "libart-compiler.so", RTLD_NOW);
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if (jit_library_handle_ == nullptr) {
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std::ostringstream oss;
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oss << "JIT could not load libart-compiler.so: " << dlerror();
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*error_msg = oss.str();
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return false;
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}
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jit_load_ = reinterpret_cast<void* (*)(bool*)>(dlsym(jit_library_handle_, "jit_load"));
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if (jit_load_ == nullptr) {
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dlclose(jit_library_handle_);
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*error_msg = "JIT couldn't find jit_load entry point";
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return false;
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}
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jit_unload_ = reinterpret_cast<void (*)(void*)>(
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dlsym(jit_library_handle_, "jit_unload"));
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if (jit_unload_ == nullptr) {
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dlclose(jit_library_handle_);
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*error_msg = "JIT couldn't find jit_unload entry point";
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return false;
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}
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jit_compile_method_ = reinterpret_cast<bool (*)(void*, ArtMethod*, Thread*, bool)>(
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dlsym(jit_library_handle_, "jit_compile_method"));
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if (jit_compile_method_ == nullptr) {
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dlclose(jit_library_handle_);
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*error_msg = "JIT couldn't find jit_compile_method entry point";
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return false;
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}
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jit_types_loaded_ = reinterpret_cast<void (*)(void*, mirror::Class**, size_t)>(
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dlsym(jit_library_handle_, "jit_types_loaded"));
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if (jit_types_loaded_ == nullptr) {
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dlclose(jit_library_handle_);
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*error_msg = "JIT couldn't find jit_types_loaded entry point";
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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 Jit::LoadCompiler(std::string* error_msg) {
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if (jit_library_handle_ == nullptr && !LoadCompilerLibrary(error_msg)) {
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return false;
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}
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bool will_generate_debug_symbols = false;
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VLOG(jit) << "Calling JitLoad interpreter_only="
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<< Runtime::Current()->GetInstrumentation()->InterpretOnly();
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jit_compiler_handle_ = (jit_load_)(&will_generate_debug_symbols);
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if (jit_compiler_handle_ == nullptr) {
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dlclose(jit_library_handle_);
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*error_msg = "JIT couldn't load compiler";
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return false;
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}
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generate_debug_info_ = will_generate_debug_symbols;
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return true;
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}
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bool Jit::CompileMethod(ArtMethod* method, Thread* self, bool osr) {
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DCHECK(Runtime::Current()->UseJitCompilation());
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DCHECK(!method->IsRuntimeMethod());
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// Don't compile the method if it has breakpoints.
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if (Dbg::IsDebuggerActive() && Dbg::MethodHasAnyBreakpoints(method)) {
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VLOG(jit) << "JIT not compiling " << method->PrettyMethod() << " due to breakpoint";
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return false;
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}
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// Don't compile the method if we are supposed to be deoptimized.
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instrumentation::Instrumentation* instrumentation = Runtime::Current()->GetInstrumentation();
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if (instrumentation->AreAllMethodsDeoptimized() || instrumentation->IsDeoptimized(method)) {
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VLOG(jit) << "JIT not compiling " << method->PrettyMethod() << " due to deoptimization";
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return false;
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}
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// If we get a request to compile a proxy method, we pass the actual Java method
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// of that proxy method, as the compiler does not expect a proxy method.
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ArtMethod* method_to_compile = method->GetInterfaceMethodIfProxy(kRuntimePointerSize);
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if (!code_cache_->NotifyCompilationOf(method_to_compile, self, osr)) {
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return false;
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}
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VLOG(jit) << "Compiling method "
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<< ArtMethod::PrettyMethod(method_to_compile)
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<< " osr=" << std::boolalpha << osr;
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bool success = jit_compile_method_(jit_compiler_handle_, method_to_compile, self, osr);
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code_cache_->DoneCompiling(method_to_compile, self, osr);
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if (!success) {
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VLOG(jit) << "Failed to compile method "
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<< ArtMethod::PrettyMethod(method_to_compile)
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<< " osr=" << std::boolalpha << osr;
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}
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if (kIsDebugBuild) {
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if (self->IsExceptionPending()) {
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mirror::Throwable* exception = self->GetException();
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LOG(FATAL) << "No pending exception expected after compiling "
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<< ArtMethod::PrettyMethod(method)
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<< ": "
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<< exception->Dump();
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}
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}
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return success;
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}
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void Jit::CreateThreadPool() {
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// There is a DCHECK in the 'AddSamples' method to ensure the tread pool
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// is not null when we instrument.
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// We need peers as we may report the JIT thread, e.g., in the debugger.
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constexpr bool kJitPoolNeedsPeers = true;
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thread_pool_.reset(new ThreadPool("Jit thread pool", 1, kJitPoolNeedsPeers));
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thread_pool_->SetPthreadPriority(kJitPoolThreadPthreadPriority);
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Start();
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}
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void Jit::DeleteThreadPool() {
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Thread* self = Thread::Current();
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DCHECK(Runtime::Current()->IsShuttingDown(self));
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if (thread_pool_ != nullptr) {
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std::unique_ptr<ThreadPool> pool;
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{
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ScopedSuspendAll ssa(__FUNCTION__);
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// Clear thread_pool_ field while the threads are suspended.
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// A mutator in the 'AddSamples' method will check against it.
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pool = std::move(thread_pool_);
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}
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// When running sanitized, let all tasks finish to not leak. Otherwise just clear the queue.
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if (!RUNNING_ON_MEMORY_TOOL) {
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pool->StopWorkers(self);
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pool->RemoveAllTasks(self);
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}
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// We could just suspend all threads, but we know those threads
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// will finish in a short period, so it's not worth adding a suspend logic
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// here. Besides, this is only done for shutdown.
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pool->Wait(self, false, false);
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}
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}
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void Jit::StartProfileSaver(const std::string& filename,
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const std::vector<std::string>& code_paths) {
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if (profile_saver_options_.IsEnabled()) {
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ProfileSaver::Start(profile_saver_options_,
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filename,
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code_cache_.get(),
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code_paths);
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}
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}
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void Jit::StopProfileSaver() {
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if (profile_saver_options_.IsEnabled() && ProfileSaver::IsStarted()) {
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ProfileSaver::Stop(dump_info_on_shutdown_);
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}
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}
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bool Jit::JitAtFirstUse() {
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return HotMethodThreshold() == 0;
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}
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bool Jit::CanInvokeCompiledCode(ArtMethod* method) {
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return code_cache_->ContainsPc(method->GetEntryPointFromQuickCompiledCode());
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}
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Jit::~Jit() {
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DCHECK(!profile_saver_options_.IsEnabled() || !ProfileSaver::IsStarted());
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if (dump_info_on_shutdown_) {
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DumpInfo(LOG_STREAM(INFO));
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Runtime::Current()->DumpDeoptimizations(LOG_STREAM(INFO));
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}
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DeleteThreadPool();
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if (jit_compiler_handle_ != nullptr) {
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jit_unload_(jit_compiler_handle_);
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jit_compiler_handle_ = nullptr;
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}
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if (jit_library_handle_ != nullptr) {
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dlclose(jit_library_handle_);
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jit_library_handle_ = nullptr;
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}
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}
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void Jit::NewTypeLoadedIfUsingJit(mirror::Class* type) {
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if (!Runtime::Current()->UseJitCompilation()) {
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// No need to notify if we only use the JIT to save profiles.
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return;
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}
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jit::Jit* jit = Runtime::Current()->GetJit();
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if (jit->generate_debug_info_) {
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DCHECK(jit->jit_types_loaded_ != nullptr);
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jit->jit_types_loaded_(jit->jit_compiler_handle_, &type, 1);
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}
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}
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void Jit::DumpTypeInfoForLoadedTypes(ClassLinker* linker) {
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struct CollectClasses : public ClassVisitor {
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bool operator()(ObjPtr<mirror::Class> klass) OVERRIDE REQUIRES_SHARED(Locks::mutator_lock_) {
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classes_.push_back(klass.Ptr());
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return true;
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}
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std::vector<mirror::Class*> classes_;
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};
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if (generate_debug_info_) {
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ScopedObjectAccess so(Thread::Current());
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CollectClasses visitor;
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linker->VisitClasses(&visitor);
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jit_types_loaded_(jit_compiler_handle_, visitor.classes_.data(), visitor.classes_.size());
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}
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}
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extern "C" void art_quick_osr_stub(void** stack,
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uint32_t stack_size_in_bytes,
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const uint8_t* native_pc,
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JValue* result,
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const char* shorty,
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Thread* self);
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bool Jit::MaybeDoOnStackReplacement(Thread* thread,
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ArtMethod* method,
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uint32_t dex_pc,
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int32_t dex_pc_offset,
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JValue* result) {
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if (!kEnableOnStackReplacement) {
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return false;
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}
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Jit* jit = Runtime::Current()->GetJit();
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if (jit == nullptr) {
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return false;
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}
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if (UNLIKELY(__builtin_frame_address(0) < thread->GetStackEnd())) {
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// Don't attempt to do an OSR if we are close to the stack limit. Since
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// the interpreter frames are still on stack, OSR has the potential
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// to stack overflow even for a simple loop.
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// b/27094810.
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return false;
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}
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// Get the actual Java method if this method is from a proxy class. The compiler
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// and the JIT code cache do not expect methods from proxy classes.
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method = method->GetInterfaceMethodIfProxy(kRuntimePointerSize);
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// Cheap check if the method has been compiled already. That's an indicator that we should
|
|
// osr into it.
|
|
if (!jit->GetCodeCache()->ContainsPc(method->GetEntryPointFromQuickCompiledCode())) {
|
|
return false;
|
|
}
|
|
|
|
// Fetch some data before looking up for an OSR method. We don't want thread
|
|
// suspension once we hold an OSR method, as the JIT code cache could delete the OSR
|
|
// method while we are being suspended.
|
|
const size_t number_of_vregs = method->GetCodeItem()->registers_size_;
|
|
const char* shorty = method->GetShorty();
|
|
std::string method_name(VLOG_IS_ON(jit) ? method->PrettyMethod() : "");
|
|
void** memory = nullptr;
|
|
size_t frame_size = 0;
|
|
ShadowFrame* shadow_frame = nullptr;
|
|
const uint8_t* native_pc = nullptr;
|
|
|
|
{
|
|
ScopedAssertNoThreadSuspension sts("Holding OSR method");
|
|
const OatQuickMethodHeader* osr_method = jit->GetCodeCache()->LookupOsrMethodHeader(method);
|
|
if (osr_method == nullptr) {
|
|
// No osr method yet, just return to the interpreter.
|
|
return false;
|
|
}
|
|
|
|
CodeInfo code_info = osr_method->GetOptimizedCodeInfo();
|
|
CodeInfoEncoding encoding = code_info.ExtractEncoding();
|
|
|
|
// Find stack map starting at the target dex_pc.
|
|
StackMap stack_map = code_info.GetOsrStackMapForDexPc(dex_pc + dex_pc_offset, encoding);
|
|
if (!stack_map.IsValid()) {
|
|
// There is no OSR stack map for this dex pc offset. Just return to the interpreter in the
|
|
// hope that the next branch has one.
|
|
return false;
|
|
}
|
|
|
|
// Before allowing the jump, make sure the debugger is not active to avoid jumping from
|
|
// interpreter to OSR while e.g. single stepping. Note that we could selectively disable
|
|
// OSR when single stepping, but that's currently hard to know at this point.
|
|
if (Dbg::IsDebuggerActive()) {
|
|
return false;
|
|
}
|
|
|
|
// We found a stack map, now fill the frame with dex register values from the interpreter's
|
|
// shadow frame.
|
|
DexRegisterMap vreg_map =
|
|
code_info.GetDexRegisterMapOf(stack_map, encoding, number_of_vregs);
|
|
|
|
frame_size = osr_method->GetFrameSizeInBytes();
|
|
|
|
// Allocate memory to put shadow frame values. The osr stub will copy that memory to
|
|
// stack.
|
|
// Note that we could pass the shadow frame to the stub, and let it copy the values there,
|
|
// but that is engineering complexity not worth the effort for something like OSR.
|
|
memory = reinterpret_cast<void**>(malloc(frame_size));
|
|
CHECK(memory != nullptr);
|
|
memset(memory, 0, frame_size);
|
|
|
|
// Art ABI: ArtMethod is at the bottom of the stack.
|
|
memory[0] = method;
|
|
|
|
shadow_frame = thread->PopShadowFrame();
|
|
if (!vreg_map.IsValid()) {
|
|
// If we don't have a dex register map, then there are no live dex registers at
|
|
// this dex pc.
|
|
} else {
|
|
for (uint16_t vreg = 0; vreg < number_of_vregs; ++vreg) {
|
|
DexRegisterLocation::Kind location =
|
|
vreg_map.GetLocationKind(vreg, number_of_vregs, code_info, encoding);
|
|
if (location == DexRegisterLocation::Kind::kNone) {
|
|
// Dex register is dead or uninitialized.
|
|
continue;
|
|
}
|
|
|
|
if (location == DexRegisterLocation::Kind::kConstant) {
|
|
// We skip constants because the compiled code knows how to handle them.
|
|
continue;
|
|
}
|
|
|
|
DCHECK_EQ(location, DexRegisterLocation::Kind::kInStack);
|
|
|
|
int32_t vreg_value = shadow_frame->GetVReg(vreg);
|
|
int32_t slot_offset = vreg_map.GetStackOffsetInBytes(vreg,
|
|
number_of_vregs,
|
|
code_info,
|
|
encoding);
|
|
DCHECK_LT(slot_offset, static_cast<int32_t>(frame_size));
|
|
DCHECK_GT(slot_offset, 0);
|
|
(reinterpret_cast<int32_t*>(memory))[slot_offset / sizeof(int32_t)] = vreg_value;
|
|
}
|
|
}
|
|
|
|
native_pc = stack_map.GetNativePcOffset(encoding.stack_map.encoding, kRuntimeISA) +
|
|
osr_method->GetEntryPoint();
|
|
VLOG(jit) << "Jumping to "
|
|
<< method_name
|
|
<< "@"
|
|
<< std::hex << reinterpret_cast<uintptr_t>(native_pc);
|
|
}
|
|
|
|
{
|
|
ManagedStack fragment;
|
|
thread->PushManagedStackFragment(&fragment);
|
|
(*art_quick_osr_stub)(memory,
|
|
frame_size,
|
|
native_pc,
|
|
result,
|
|
shorty,
|
|
thread);
|
|
|
|
if (UNLIKELY(thread->GetException() == Thread::GetDeoptimizationException())) {
|
|
thread->DeoptimizeWithDeoptimizationException(result);
|
|
}
|
|
thread->PopManagedStackFragment(fragment);
|
|
}
|
|
free(memory);
|
|
thread->PushShadowFrame(shadow_frame);
|
|
VLOG(jit) << "Done running OSR code for " << method_name;
|
|
return true;
|
|
}
|
|
|
|
void Jit::AddMemoryUsage(ArtMethod* method, size_t bytes) {
|
|
if (bytes > 4 * MB) {
|
|
LOG(INFO) << "Compiler allocated "
|
|
<< PrettySize(bytes)
|
|
<< " to compile "
|
|
<< ArtMethod::PrettyMethod(method);
|
|
}
|
|
MutexLock mu(Thread::Current(), lock_);
|
|
memory_use_.AddValue(bytes);
|
|
}
|
|
|
|
class JitCompileTask FINAL : public Task {
|
|
public:
|
|
enum TaskKind {
|
|
kAllocateProfile,
|
|
kCompile,
|
|
kCompileOsr
|
|
};
|
|
|
|
JitCompileTask(ArtMethod* method, TaskKind kind) : method_(method), kind_(kind) {
|
|
ScopedObjectAccess soa(Thread::Current());
|
|
// Add a global ref to the class to prevent class unloading until compilation is done.
|
|
klass_ = soa.Vm()->AddGlobalRef(soa.Self(), method_->GetDeclaringClass());
|
|
CHECK(klass_ != nullptr);
|
|
}
|
|
|
|
~JitCompileTask() {
|
|
ScopedObjectAccess soa(Thread::Current());
|
|
soa.Vm()->DeleteGlobalRef(soa.Self(), klass_);
|
|
}
|
|
|
|
void Run(Thread* self) OVERRIDE {
|
|
ScopedObjectAccess soa(self);
|
|
if (kind_ == kCompile) {
|
|
Runtime::Current()->GetJit()->CompileMethod(method_, self, /* osr */ false);
|
|
} else if (kind_ == kCompileOsr) {
|
|
Runtime::Current()->GetJit()->CompileMethod(method_, self, /* osr */ true);
|
|
} else {
|
|
DCHECK(kind_ == kAllocateProfile);
|
|
if (ProfilingInfo::Create(self, method_, /* retry_allocation */ true)) {
|
|
VLOG(jit) << "Start profiling " << ArtMethod::PrettyMethod(method_);
|
|
}
|
|
}
|
|
ProfileSaver::NotifyJitActivity();
|
|
}
|
|
|
|
void Finalize() OVERRIDE {
|
|
delete this;
|
|
}
|
|
|
|
private:
|
|
ArtMethod* const method_;
|
|
const TaskKind kind_;
|
|
jobject klass_;
|
|
|
|
DISALLOW_IMPLICIT_CONSTRUCTORS(JitCompileTask);
|
|
};
|
|
|
|
void Jit::AddSamples(Thread* self, ArtMethod* method, uint16_t count, bool with_backedges) {
|
|
if (thread_pool_ == nullptr) {
|
|
// Should only see this when shutting down.
|
|
DCHECK(Runtime::Current()->IsShuttingDown(self));
|
|
return;
|
|
}
|
|
|
|
if (method->IsClassInitializer() || method->IsNative() || !method->IsCompilable()) {
|
|
// We do not want to compile such methods.
|
|
return;
|
|
}
|
|
DCHECK(thread_pool_ != nullptr);
|
|
DCHECK_GT(warm_method_threshold_, 0);
|
|
DCHECK_GT(hot_method_threshold_, warm_method_threshold_);
|
|
DCHECK_GT(osr_method_threshold_, hot_method_threshold_);
|
|
DCHECK_GE(priority_thread_weight_, 1);
|
|
DCHECK_LE(priority_thread_weight_, hot_method_threshold_);
|
|
|
|
int32_t starting_count = method->GetCounter();
|
|
if (Jit::ShouldUsePriorityThreadWeight()) {
|
|
count *= priority_thread_weight_;
|
|
}
|
|
int32_t new_count = starting_count + count; // int32 here to avoid wrap-around;
|
|
if (starting_count < warm_method_threshold_) {
|
|
if ((new_count >= warm_method_threshold_) &&
|
|
(method->GetProfilingInfo(kRuntimePointerSize) == nullptr)) {
|
|
bool success = ProfilingInfo::Create(self, method, /* retry_allocation */ false);
|
|
if (success) {
|
|
VLOG(jit) << "Start profiling " << method->PrettyMethod();
|
|
}
|
|
|
|
if (thread_pool_ == nullptr) {
|
|
// Calling ProfilingInfo::Create might put us in a suspended state, which could
|
|
// lead to the thread pool being deleted when we are shutting down.
|
|
DCHECK(Runtime::Current()->IsShuttingDown(self));
|
|
return;
|
|
}
|
|
|
|
if (!success) {
|
|
// We failed allocating. Instead of doing the collection on the Java thread, we push
|
|
// an allocation to a compiler thread, that will do the collection.
|
|
thread_pool_->AddTask(self, new JitCompileTask(method, JitCompileTask::kAllocateProfile));
|
|
}
|
|
}
|
|
// Avoid jumping more than one state at a time.
|
|
new_count = std::min(new_count, hot_method_threshold_ - 1);
|
|
} else if (use_jit_compilation_) {
|
|
if (starting_count < hot_method_threshold_) {
|
|
if ((new_count >= hot_method_threshold_) &&
|
|
!code_cache_->ContainsPc(method->GetEntryPointFromQuickCompiledCode())) {
|
|
DCHECK(thread_pool_ != nullptr);
|
|
thread_pool_->AddTask(self, new JitCompileTask(method, JitCompileTask::kCompile));
|
|
}
|
|
// Avoid jumping more than one state at a time.
|
|
new_count = std::min(new_count, osr_method_threshold_ - 1);
|
|
} else if (starting_count < osr_method_threshold_) {
|
|
if (!with_backedges) {
|
|
// If the samples don't contain any back edge, we don't increment the hotness.
|
|
return;
|
|
}
|
|
if ((new_count >= osr_method_threshold_) && !code_cache_->IsOsrCompiled(method)) {
|
|
DCHECK(thread_pool_ != nullptr);
|
|
thread_pool_->AddTask(self, new JitCompileTask(method, JitCompileTask::kCompileOsr));
|
|
}
|
|
}
|
|
}
|
|
// Update hotness counter
|
|
method->SetCounter(new_count);
|
|
}
|
|
|
|
void Jit::MethodEntered(Thread* thread, ArtMethod* method) {
|
|
Runtime* runtime = Runtime::Current();
|
|
if (UNLIKELY(runtime->UseJitCompilation() && runtime->GetJit()->JitAtFirstUse())) {
|
|
// The compiler requires a ProfilingInfo object.
|
|
ProfilingInfo::Create(thread, method, /* retry_allocation */ true);
|
|
JitCompileTask compile_task(method, JitCompileTask::kCompile);
|
|
compile_task.Run(thread);
|
|
return;
|
|
}
|
|
|
|
ProfilingInfo* profiling_info = method->GetProfilingInfo(kRuntimePointerSize);
|
|
// Update the entrypoint if the ProfilingInfo has one. The interpreter will call it
|
|
// instead of interpreting the method.
|
|
if ((profiling_info != nullptr) && (profiling_info->GetSavedEntryPoint() != nullptr)) {
|
|
Runtime::Current()->GetInstrumentation()->UpdateMethodsCode(
|
|
method, profiling_info->GetSavedEntryPoint());
|
|
} else {
|
|
AddSamples(thread, method, 1, /* with_backedges */false);
|
|
}
|
|
}
|
|
|
|
void Jit::InvokeVirtualOrInterface(ObjPtr<mirror::Object> this_object,
|
|
ArtMethod* caller,
|
|
uint32_t dex_pc,
|
|
ArtMethod* callee ATTRIBUTE_UNUSED) {
|
|
ScopedAssertNoThreadSuspension ants(__FUNCTION__);
|
|
DCHECK(this_object != nullptr);
|
|
ProfilingInfo* info = caller->GetProfilingInfo(kRuntimePointerSize);
|
|
if (info != nullptr) {
|
|
info->AddInvokeInfo(dex_pc, this_object->GetClass());
|
|
}
|
|
}
|
|
|
|
void Jit::WaitForCompilationToFinish(Thread* self) {
|
|
if (thread_pool_ != nullptr) {
|
|
thread_pool_->Wait(self, false, false);
|
|
}
|
|
}
|
|
|
|
void Jit::Stop() {
|
|
Thread* self = Thread::Current();
|
|
// TODO(ngeoffray): change API to not require calling WaitForCompilationToFinish twice.
|
|
WaitForCompilationToFinish(self);
|
|
GetThreadPool()->StopWorkers(self);
|
|
WaitForCompilationToFinish(self);
|
|
}
|
|
|
|
void Jit::Start() {
|
|
GetThreadPool()->StartWorkers(Thread::Current());
|
|
}
|
|
|
|
ScopedJitSuspend::ScopedJitSuspend() {
|
|
jit::Jit* jit = Runtime::Current()->GetJit();
|
|
was_on_ = (jit != nullptr) && (jit->GetThreadPool() != nullptr);
|
|
if (was_on_) {
|
|
jit->Stop();
|
|
}
|
|
}
|
|
|
|
ScopedJitSuspend::~ScopedJitSuspend() {
|
|
if (was_on_) {
|
|
DCHECK(Runtime::Current()->GetJit() != nullptr);
|
|
DCHECK(Runtime::Current()->GetJit()->GetThreadPool() != nullptr);
|
|
Runtime::Current()->GetJit()->Start();
|
|
}
|
|
}
|
|
|
|
} // namespace jit
|
|
} // namespace art
|