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1819 lines
68 KiB
1819 lines
68 KiB
/*
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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/file_utils.h"
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#include "base/logging.h" // For VLOG.
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#include "base/memfd.h"
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#include "base/memory_tool.h"
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#include "base/runtime_debug.h"
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#include "base/scoped_flock.h"
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#include "base/utils.h"
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#include "class_root-inl.h"
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#include "compilation_kind.h"
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#include "debugger.h"
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#include "dex/type_lookup_table.h"
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#include "gc/space/image_space.h"
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#include "entrypoints/entrypoint_utils-inl.h"
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#include "entrypoints/runtime_asm_entrypoints.h"
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#include "image-inl.h"
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#include "interpreter/interpreter.h"
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#include "jit-inl.h"
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#include "jit_code_cache.h"
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#include "jni/java_vm_ext.h"
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#include "mirror/method_handle_impl.h"
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#include "mirror/var_handle.h"
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#include "oat_file.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/profile_boot_info.h"
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#include "profile/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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using android::base::unique_fd;
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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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// Maximum permitted threshold value.
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static constexpr uint32_t kJitMaxThreshold = std::numeric_limits<uint16_t>::max();
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// Different compilation threshold constants. These can be overridden on the command line.
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// Non-debug default
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static constexpr uint32_t kJitDefaultCompileThreshold = 20 * kJitSamplesBatchSize;
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// Fast-debug build.
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static constexpr uint32_t kJitStressDefaultCompileThreshold = 2 * kJitSamplesBatchSize;
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// Slow-debug build.
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static constexpr uint32_t kJitSlowStressDefaultCompileThreshold = 2;
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// Different warm-up threshold constants. These default to the equivalent compile thresholds divided
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// by 2, but can be overridden at the command-line.
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static constexpr uint32_t kJitDefaultWarmUpThreshold = kJitDefaultCompileThreshold / 2;
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static constexpr uint32_t kJitStressDefaultWarmUpThreshold = kJitStressDefaultCompileThreshold / 2;
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static constexpr uint32_t kJitSlowStressDefaultWarmUpThreshold =
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kJitSlowStressDefaultCompileThreshold / 2;
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DEFINE_RUNTIME_DEBUG_FLAG(Jit, kSlowMode);
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// JIT compiler
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void* Jit::jit_library_handle_ = nullptr;
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JitCompilerInterface* Jit::jit_compiler_ = nullptr;
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JitCompilerInterface* (*Jit::jit_load_)(void) = nullptr;
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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->use_profiled_jit_compilation_ =
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options.GetOrDefault(RuntimeArgumentMap::UseProfiledJitCompilation);
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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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jit_options->thread_pool_pthread_priority_ =
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options.GetOrDefault(RuntimeArgumentMap::JITPoolThreadPthreadPriority);
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jit_options->zygote_thread_pool_pthread_priority_ =
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options.GetOrDefault(RuntimeArgumentMap::JITZygotePoolThreadPthreadPriority);
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// Set default compile threshold to aid with checking defaults.
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jit_options->compile_threshold_ =
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kIsDebugBuild
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? (Jit::kSlowMode
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? kJitSlowStressDefaultCompileThreshold
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: kJitStressDefaultCompileThreshold)
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: kJitDefaultCompileThreshold;
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// When not running in slow-mode, thresholds are quantized to kJitSamplesbatchsize.
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const uint32_t kJitThresholdStep = Jit::kSlowMode ? 1u : kJitSamplesBatchSize;
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// Set default warm-up threshold to aid with checking defaults.
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jit_options->warmup_threshold_ =
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kIsDebugBuild ? (Jit::kSlowMode
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? kJitSlowStressDefaultWarmUpThreshold
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: kJitStressDefaultWarmUpThreshold)
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: kJitDefaultWarmUpThreshold;
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// Warmup threshold should be less than compile threshold (so long as compile threshold is not
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// zero == JIT-on-first-use).
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DCHECK_LT(jit_options->warmup_threshold_, jit_options->compile_threshold_);
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DCHECK_EQ(RoundUp(jit_options->warmup_threshold_, kJitThresholdStep),
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jit_options->warmup_threshold_);
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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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}
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jit_options->compile_threshold_ = RoundUp(jit_options->compile_threshold_, kJitThresholdStep);
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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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}
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jit_options->warmup_threshold_ = RoundUp(jit_options->warmup_threshold_, kJitThresholdStep);
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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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} else {
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jit_options->osr_threshold_ = jit_options->compile_threshold_ * 2;
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if (jit_options->osr_threshold_ > kJitMaxThreshold) {
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jit_options->osr_threshold_ =
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RoundDown(kJitMaxThreshold, kJitThresholdStep);
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}
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}
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jit_options->osr_threshold_ = RoundUp(jit_options->osr_threshold_, kJitThresholdStep);
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// Enforce ordering constraints between thresholds if not jit-on-first-use (when the compile
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// threshold is 0).
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if (jit_options->compile_threshold_ != 0) {
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// Clamp thresholds such that OSR > compile > warm-up (see Jit::MaybeCompileMethod).
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jit_options->osr_threshold_ = std::clamp(jit_options->osr_threshold_,
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2u * kJitThresholdStep,
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RoundDown(kJitMaxThreshold, kJitThresholdStep));
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jit_options->compile_threshold_ = std::clamp(jit_options->compile_threshold_,
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kJitThresholdStep,
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jit_options->osr_threshold_ - kJitThresholdStep);
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jit_options->warmup_threshold_ =
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std::clamp(jit_options->warmup_threshold_,
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0u,
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jit_options->compile_threshold_ - kJitThresholdStep);
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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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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(JitCodeCache* code_cache, JitOptions* options)
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: code_cache_(code_cache),
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options_(options),
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boot_completed_lock_("Jit::boot_completed_lock_"),
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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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zygote_mapping_methods_(),
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fd_methods_(-1),
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fd_methods_size_(0) {}
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Jit* Jit::Create(JitCodeCache* code_cache, JitOptions* options) {
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if (jit_load_ == nullptr) {
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LOG(WARNING) << "Not creating JIT: library not loaded";
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return nullptr;
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}
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jit_compiler_ = (jit_load_)();
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if (jit_compiler_ == nullptr) {
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LOG(WARNING) << "Not creating JIT: failed to allocate a compiler";
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return nullptr;
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}
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std::unique_ptr<Jit> jit(new Jit(code_cache, options));
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// If the code collector is enabled, check if that still holds:
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// With 'perf', we want a 1-1 mapping between an address and a method.
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// We aren't able to keep method pointers live during the instrumentation method entry trampoline
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// so we will just disable jit-gc if we are doing that.
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if (code_cache->GetGarbageCollectCode()) {
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code_cache->SetGarbageCollectCode(!jit_compiler_->GenerateDebugInfo() &&
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!Runtime::Current()->GetInstrumentation()->AreExitStubsInstalled());
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}
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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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// We want to know whether the compiler is compiling baseline, as this
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// affects how we GC ProfilingInfos.
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for (const std::string& option : Runtime::Current()->GetCompilerOptions()) {
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if (option == "--baseline") {
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options->SetUseBaselineCompiler();
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break;
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}
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}
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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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template <typename T>
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bool Jit::LoadSymbol(T* address, const char* name, std::string* error_msg) {
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*address = reinterpret_cast<T>(dlsym(jit_library_handle_, name));
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if (*address == nullptr) {
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*error_msg = std::string("JIT couldn't find ") + name + std::string(" 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::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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if (!LoadSymbol(&jit_load_, "jit_load", error_msg)) {
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dlclose(jit_library_handle_);
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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::CompileMethod(ArtMethod* method,
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Thread* self,
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CompilationKind compilation_kind,
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bool prejit) {
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DCHECK(Runtime::Current()->UseJitCompilation());
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DCHECK(!method->IsRuntimeMethod());
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RuntimeCallbacks* cb = Runtime::Current()->GetRuntimeCallbacks();
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// Don't compile the method if it has breakpoints.
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if (cb->IsMethodBeingInspected(method) && !cb->IsMethodSafeToJit(method)) {
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VLOG(jit) << "JIT not compiling " << method->PrettyMethod()
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<< " due to not being safe to jit according to runtime-callbacks. For example, there"
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<< " could be breakpoints in this method.";
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return false;
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}
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if (!method->IsCompilable()) {
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DCHECK(method->GetDeclaringClass()->IsObsoleteObject() ||
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method->IsProxyMethod()) << method->PrettyMethod();
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VLOG(jit) << "JIT not compiling " << method->PrettyMethod() << " due to method being made "
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<< "obsolete while waiting for JIT task to run. This probably happened due to "
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<< "concurrent structural class redefinition.";
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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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JitMemoryRegion* region = GetCodeCache()->GetCurrentRegion();
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if ((compilation_kind == CompilationKind::kOsr) && GetCodeCache()->IsSharedRegion(*region)) {
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VLOG(jit) << "JIT not osr compiling "
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<< method->PrettyMethod()
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<< " due to using shared region";
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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, compilation_kind, prejit)) {
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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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<< " kind=" << compilation_kind;
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bool success = jit_compiler_->CompileMethod(self, region, method_to_compile, compilation_kind);
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code_cache_->DoneCompiling(method_to_compile, self, compilation_kind);
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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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<< " kind=" << compilation_kind;
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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::WaitForWorkersToBeCreated() {
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if (thread_pool_ != nullptr) {
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thread_pool_->WaitForWorkersToBeCreated();
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}
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}
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void Jit::DeleteThreadPool() {
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Thread* self = Thread::Current();
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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 (!kRunningOnMemoryTool) {
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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& profile_filename,
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const std::vector<std::string>& code_paths,
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const std::string& ref_profile_filename) {
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if (options_->GetSaveProfilingInfo()) {
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ProfileSaver::Start(options_->GetProfileSaverOptions(),
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profile_filename,
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code_cache_,
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code_paths,
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ref_profile_filename);
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}
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}
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void Jit::StopProfileSaver() {
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if (options_->GetSaveProfilingInfo() && ProfileSaver::IsStarted()) {
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ProfileSaver::Stop(options_->DumpJitInfoOnShutdown());
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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(!options_->GetSaveProfilingInfo() || !ProfileSaver::IsStarted());
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if (options_->DumpJitInfoOnShutdown()) {
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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_ != nullptr) {
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delete jit_compiler_;
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jit_compiler_ = 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->jit_compiler_->GenerateDebugInfo()) {
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jit_compiler_->TypesLoaded(&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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}
|
|
std::vector<mirror::Class*> classes_;
|
|
};
|
|
|
|
if (jit_compiler_->GenerateDebugInfo()) {
|
|
ScopedObjectAccess so(Thread::Current());
|
|
|
|
CollectClasses visitor;
|
|
linker->VisitClasses(&visitor);
|
|
jit_compiler_->TypesLoaded(visitor.classes_.data(), visitor.classes_.size());
|
|
}
|
|
}
|
|
|
|
extern "C" void art_quick_osr_stub(void** stack,
|
|
size_t stack_size_in_bytes,
|
|
const uint8_t* native_pc,
|
|
JValue* result,
|
|
const char* shorty,
|
|
Thread* self);
|
|
|
|
OsrData* Jit::PrepareForOsr(ArtMethod* method, uint32_t dex_pc, uint32_t* vregs) {
|
|
if (!kEnableOnStackReplacement) {
|
|
return nullptr;
|
|
}
|
|
|
|
// Cheap check if the method has been compiled already. That's an indicator that we should
|
|
// osr into it.
|
|
if (!GetCodeCache()->ContainsPc(method->GetEntryPointFromQuickCompiledCode())) {
|
|
return nullptr;
|
|
}
|
|
|
|
// 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.
|
|
CodeItemDataAccessor accessor(method->DexInstructionData());
|
|
const size_t number_of_vregs = accessor.RegistersSize();
|
|
std::string method_name(VLOG_IS_ON(jit) ? method->PrettyMethod() : "");
|
|
OsrData* osr_data = nullptr;
|
|
|
|
{
|
|
ScopedAssertNoThreadSuspension sts("Holding OSR method");
|
|
const OatQuickMethodHeader* osr_method = GetCodeCache()->LookupOsrMethodHeader(method);
|
|
if (osr_method == nullptr) {
|
|
// No osr method yet, just return to the interpreter.
|
|
return nullptr;
|
|
}
|
|
|
|
CodeInfo code_info(osr_method);
|
|
|
|
// Find stack map starting at the target dex_pc.
|
|
StackMap stack_map = code_info.GetOsrStackMapForDexPc(dex_pc);
|
|
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 nullptr;
|
|
}
|
|
|
|
// 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);
|
|
DCHECK_EQ(vreg_map.size(), number_of_vregs);
|
|
|
|
size_t 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.
|
|
osr_data = reinterpret_cast<OsrData*>(malloc(sizeof(OsrData) + frame_size));
|
|
if (osr_data == nullptr) {
|
|
return nullptr;
|
|
}
|
|
memset(osr_data, 0, sizeof(OsrData) + frame_size);
|
|
osr_data->frame_size = frame_size;
|
|
|
|
// Art ABI: ArtMethod is at the bottom of the stack.
|
|
osr_data->memory[0] = method;
|
|
|
|
if (vreg_map.empty()) {
|
|
// 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[vreg].GetKind();
|
|
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 = vregs[vreg];
|
|
int32_t slot_offset = vreg_map[vreg].GetStackOffsetInBytes();
|
|
DCHECK_LT(slot_offset, static_cast<int32_t>(frame_size));
|
|
DCHECK_GT(slot_offset, 0);
|
|
(reinterpret_cast<int32_t*>(osr_data->memory))[slot_offset / sizeof(int32_t)] = vreg_value;
|
|
}
|
|
}
|
|
|
|
osr_data->native_pc = stack_map.GetNativePcOffset(kRuntimeISA) +
|
|
osr_method->GetEntryPoint();
|
|
VLOG(jit) << "Jumping to "
|
|
<< method_name
|
|
<< "@"
|
|
<< std::hex << reinterpret_cast<uintptr_t>(osr_data->native_pc);
|
|
}
|
|
return osr_data;
|
|
}
|
|
|
|
bool Jit::MaybeDoOnStackReplacement(Thread* thread,
|
|
ArtMethod* method,
|
|
uint32_t dex_pc,
|
|
int32_t dex_pc_offset,
|
|
JValue* result) {
|
|
Jit* jit = Runtime::Current()->GetJit();
|
|
if (jit == nullptr) {
|
|
return false;
|
|
}
|
|
|
|
if (UNLIKELY(__builtin_frame_address(0) < thread->GetStackEnd())) {
|
|
// Don't attempt to do an OSR if we are close to the stack limit. Since
|
|
// the interpreter frames are still on stack, OSR has the potential
|
|
// to stack overflow even for a simple loop.
|
|
// b/27094810.
|
|
return false;
|
|
}
|
|
|
|
// Get the actual Java method if this method is from a proxy class. The compiler
|
|
// and the JIT code cache do not expect methods from proxy classes.
|
|
method = method->GetInterfaceMethodIfProxy(kRuntimePointerSize);
|
|
|
|
// Before allowing the jump, make sure no code is actively inspecting the method 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 (Runtime::Current()->GetRuntimeCallbacks()->IsMethodBeingInspected(method)) {
|
|
return false;
|
|
}
|
|
|
|
ShadowFrame* shadow_frame = thread->GetManagedStack()->GetTopShadowFrame();
|
|
OsrData* osr_data = jit->PrepareForOsr(method,
|
|
dex_pc + dex_pc_offset,
|
|
shadow_frame->GetVRegArgs(0));
|
|
|
|
if (osr_data == nullptr) {
|
|
return false;
|
|
}
|
|
|
|
{
|
|
thread->PopShadowFrame();
|
|
ManagedStack fragment;
|
|
thread->PushManagedStackFragment(&fragment);
|
|
(*art_quick_osr_stub)(osr_data->memory,
|
|
osr_data->frame_size,
|
|
osr_data->native_pc,
|
|
result,
|
|
method->GetShorty(),
|
|
thread);
|
|
|
|
if (UNLIKELY(thread->GetException() == Thread::GetDeoptimizationException())) {
|
|
thread->DeoptimizeWithDeoptimizationException(result);
|
|
}
|
|
thread->PopManagedStackFragment(fragment);
|
|
}
|
|
free(osr_data);
|
|
thread->PushShadowFrame(shadow_frame);
|
|
VLOG(jit) << "Done running OSR code for " << method->PrettyMethod();
|
|
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);
|
|
}
|
|
|
|
void Jit::NotifyZygoteCompilationDone() {
|
|
if (fd_methods_ == -1) {
|
|
return;
|
|
}
|
|
|
|
size_t offset = 0;
|
|
for (gc::space::ImageSpace* space : Runtime::Current()->GetHeap()->GetBootImageSpaces()) {
|
|
const ImageHeader& header = space->GetImageHeader();
|
|
const ImageSection& section = header.GetMethodsSection();
|
|
// Because mremap works at page boundaries, we can only handle methods
|
|
// within a page range. For methods that falls above or below the range,
|
|
// the child processes will copy their contents to their private mapping
|
|
// in `child_mapping_methods`. See `MapBootImageMethods`.
|
|
uint8_t* page_start = AlignUp(header.GetImageBegin() + section.Offset(), kPageSize);
|
|
uint8_t* page_end =
|
|
AlignDown(header.GetImageBegin() + section.Offset() + section.Size(), kPageSize);
|
|
if (page_end > page_start) {
|
|
uint64_t capacity = page_end - page_start;
|
|
memcpy(zygote_mapping_methods_.Begin() + offset, page_start, capacity);
|
|
offset += capacity;
|
|
}
|
|
}
|
|
|
|
// Do an msync to ensure we are not affected by writes still being in caches.
|
|
if (msync(zygote_mapping_methods_.Begin(), fd_methods_size_, MS_SYNC) != 0) {
|
|
PLOG(WARNING) << "Failed to sync boot image methods memory";
|
|
code_cache_->GetZygoteMap()->SetCompilationState(ZygoteCompilationState::kNotifiedFailure);
|
|
return;
|
|
}
|
|
|
|
// We don't need the shared mapping anymore, and we need to drop it in case
|
|
// the file hasn't been sealed writable.
|
|
zygote_mapping_methods_ = MemMap::Invalid();
|
|
|
|
// Seal writes now. Zygote and children will map the memory private in order
|
|
// to write to it.
|
|
if (fcntl(fd_methods_, F_ADD_SEALS, F_SEAL_SEAL | F_SEAL_WRITE) == -1) {
|
|
PLOG(WARNING) << "Failed to seal boot image methods file descriptor";
|
|
code_cache_->GetZygoteMap()->SetCompilationState(ZygoteCompilationState::kNotifiedFailure);
|
|
return;
|
|
}
|
|
|
|
std::string error_str;
|
|
MemMap child_mapping_methods = MemMap::MapFile(
|
|
fd_methods_size_,
|
|
PROT_READ | PROT_WRITE,
|
|
MAP_PRIVATE,
|
|
fd_methods_,
|
|
/* start= */ 0,
|
|
/* low_4gb= */ false,
|
|
"boot-image-methods",
|
|
&error_str);
|
|
|
|
if (!child_mapping_methods.IsValid()) {
|
|
LOG(WARNING) << "Failed to create child mapping of boot image methods: " << error_str;
|
|
code_cache_->GetZygoteMap()->SetCompilationState(ZygoteCompilationState::kNotifiedFailure);
|
|
return;
|
|
}
|
|
|
|
// Ensure the contents are the same as before: there was a window between
|
|
// the memcpy and the sealing where other processes could have changed the
|
|
// contents.
|
|
// Note this would not be needed if we could have used F_SEAL_FUTURE_WRITE,
|
|
// see b/143833776.
|
|
offset = 0;
|
|
for (gc::space::ImageSpace* space : Runtime::Current()->GetHeap()->GetBootImageSpaces()) {
|
|
const ImageHeader& header = space->GetImageHeader();
|
|
const ImageSection& section = header.GetMethodsSection();
|
|
// Because mremap works at page boundaries, we can only handle methods
|
|
// within a page range. For methods that falls above or below the range,
|
|
// the child processes will copy their contents to their private mapping
|
|
// in `child_mapping_methods`. See `MapBootImageMethods`.
|
|
uint8_t* page_start = AlignUp(header.GetImageBegin() + section.Offset(), kPageSize);
|
|
uint8_t* page_end =
|
|
AlignDown(header.GetImageBegin() + section.Offset() + section.Size(), kPageSize);
|
|
if (page_end > page_start) {
|
|
uint64_t capacity = page_end - page_start;
|
|
if (memcmp(child_mapping_methods.Begin() + offset, page_start, capacity) != 0) {
|
|
LOG(WARNING) << "Contents differ in boot image methods data";
|
|
code_cache_->GetZygoteMap()->SetCompilationState(
|
|
ZygoteCompilationState::kNotifiedFailure);
|
|
return;
|
|
}
|
|
offset += capacity;
|
|
}
|
|
}
|
|
|
|
// Future spawned processes don't need the fd anymore.
|
|
fd_methods_.reset();
|
|
|
|
// In order to have the zygote and children share the memory, we also remap
|
|
// the memory into the zygote process.
|
|
offset = 0;
|
|
for (gc::space::ImageSpace* space : Runtime::Current()->GetHeap()->GetBootImageSpaces()) {
|
|
const ImageHeader& header = space->GetImageHeader();
|
|
const ImageSection& section = header.GetMethodsSection();
|
|
// Because mremap works at page boundaries, we can only handle methods
|
|
// within a page range. For methods that falls above or below the range,
|
|
// the child processes will copy their contents to their private mapping
|
|
// in `child_mapping_methods`. See `MapBootImageMethods`.
|
|
uint8_t* page_start = AlignUp(header.GetImageBegin() + section.Offset(), kPageSize);
|
|
uint8_t* page_end =
|
|
AlignDown(header.GetImageBegin() + section.Offset() + section.Size(), kPageSize);
|
|
if (page_end > page_start) {
|
|
uint64_t capacity = page_end - page_start;
|
|
if (mremap(child_mapping_methods.Begin() + offset,
|
|
capacity,
|
|
capacity,
|
|
MREMAP_FIXED | MREMAP_MAYMOVE,
|
|
page_start) == MAP_FAILED) {
|
|
// Failing to remap is safe as the process will just use the old
|
|
// contents.
|
|
PLOG(WARNING) << "Failed mremap of boot image methods of " << space->GetImageFilename();
|
|
}
|
|
offset += capacity;
|
|
}
|
|
}
|
|
|
|
LOG(INFO) << "Successfully notified child processes on sharing boot image methods";
|
|
|
|
// Mark that compilation of boot classpath is done, and memory can now be
|
|
// shared. Other processes will pick up this information.
|
|
code_cache_->GetZygoteMap()->SetCompilationState(ZygoteCompilationState::kNotifiedOk);
|
|
|
|
// The private mapping created for this process has been mremaped. We can
|
|
// reset it.
|
|
child_mapping_methods.Reset();
|
|
}
|
|
|
|
class JitCompileTask final : public Task {
|
|
public:
|
|
enum class TaskKind {
|
|
kCompile,
|
|
kPreCompile,
|
|
};
|
|
|
|
JitCompileTask(ArtMethod* method, TaskKind task_kind, CompilationKind compilation_kind)
|
|
: method_(method), kind_(task_kind), compilation_kind_(compilation_kind), klass_(nullptr) {
|
|
ScopedObjectAccess soa(Thread::Current());
|
|
// For a non-bootclasspath class, add a global ref to the class to prevent class unloading
|
|
// until compilation is done.
|
|
// When we precompile, this is either with boot classpath methods, or main
|
|
// class loader methods, so we don't need to keep a global reference.
|
|
if (method->GetDeclaringClass()->GetClassLoader() != nullptr &&
|
|
kind_ != TaskKind::kPreCompile) {
|
|
klass_ = soa.Vm()->AddGlobalRef(soa.Self(), method_->GetDeclaringClass());
|
|
CHECK(klass_ != nullptr);
|
|
}
|
|
}
|
|
|
|
~JitCompileTask() {
|
|
if (klass_ != nullptr) {
|
|
ScopedObjectAccess soa(Thread::Current());
|
|
soa.Vm()->DeleteGlobalRef(soa.Self(), klass_);
|
|
}
|
|
}
|
|
|
|
void Run(Thread* self) override {
|
|
{
|
|
ScopedObjectAccess soa(self);
|
|
switch (kind_) {
|
|
case TaskKind::kCompile:
|
|
case TaskKind::kPreCompile: {
|
|
Runtime::Current()->GetJit()->CompileMethod(
|
|
method_,
|
|
self,
|
|
compilation_kind_,
|
|
/* prejit= */ (kind_ == TaskKind::kPreCompile));
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
ProfileSaver::NotifyJitActivity();
|
|
}
|
|
|
|
void Finalize() override {
|
|
delete this;
|
|
}
|
|
|
|
private:
|
|
ArtMethod* const method_;
|
|
const TaskKind kind_;
|
|
const CompilationKind compilation_kind_;
|
|
jobject klass_;
|
|
|
|
DISALLOW_IMPLICIT_CONSTRUCTORS(JitCompileTask);
|
|
};
|
|
|
|
static std::string GetProfileFile(const std::string& dex_location) {
|
|
// Hardcoded assumption where the profile file is.
|
|
// TODO(ngeoffray): this is brittle and we would need to change change if we
|
|
// wanted to do more eager JITting of methods in a profile. This is
|
|
// currently only for system server.
|
|
return dex_location + ".prof";
|
|
}
|
|
|
|
static std::string GetBootProfileFile(const std::string& profile) {
|
|
// The boot profile can be found next to the compilation profile, with a
|
|
// different extension.
|
|
return ReplaceFileExtension(profile, "bprof");
|
|
}
|
|
|
|
/**
|
|
* A JIT task to run after all profile compilation is done.
|
|
*/
|
|
class JitDoneCompilingProfileTask final : public SelfDeletingTask {
|
|
public:
|
|
explicit JitDoneCompilingProfileTask(const std::vector<const DexFile*>& dex_files)
|
|
: dex_files_(dex_files) {}
|
|
|
|
void Run(Thread* self ATTRIBUTE_UNUSED) override {
|
|
// Madvise DONTNEED dex files now that we're done compiling methods.
|
|
for (const DexFile* dex_file : dex_files_) {
|
|
if (IsAddressKnownBackedByFileOrShared(dex_file->Begin())) {
|
|
int result = madvise(const_cast<uint8_t*>(AlignDown(dex_file->Begin(), kPageSize)),
|
|
RoundUp(dex_file->Size(), kPageSize),
|
|
MADV_DONTNEED);
|
|
if (result == -1) {
|
|
PLOG(WARNING) << "Madvise failed";
|
|
}
|
|
}
|
|
}
|
|
|
|
if (Runtime::Current()->IsZygote()) {
|
|
// Record that we are done compiling the profile.
|
|
Runtime::Current()->GetJit()->GetCodeCache()->GetZygoteMap()->SetCompilationState(
|
|
ZygoteCompilationState::kDone);
|
|
}
|
|
}
|
|
|
|
private:
|
|
std::vector<const DexFile*> dex_files_;
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(JitDoneCompilingProfileTask);
|
|
};
|
|
|
|
/**
|
|
* A JIT task to run Java verification of boot classpath classes that were not
|
|
* verified at compile-time.
|
|
*/
|
|
class ZygoteVerificationTask final : public Task {
|
|
public:
|
|
ZygoteVerificationTask() {}
|
|
|
|
void Run(Thread* self) override {
|
|
// We are going to load class and run verification, which may also need to load
|
|
// classes. If the thread cannot load classes (typically when the runtime is
|
|
// debuggable), then just return.
|
|
if (!self->CanLoadClasses()) {
|
|
return;
|
|
}
|
|
Runtime* runtime = Runtime::Current();
|
|
ClassLinker* linker = runtime->GetClassLinker();
|
|
const std::vector<const DexFile*>& boot_class_path =
|
|
runtime->GetClassLinker()->GetBootClassPath();
|
|
ScopedObjectAccess soa(self);
|
|
StackHandleScope<1> hs(self);
|
|
MutableHandle<mirror::Class> klass = hs.NewHandle<mirror::Class>(nullptr);
|
|
uint64_t start_ns = ThreadCpuNanoTime();
|
|
uint64_t number_of_classes = 0;
|
|
for (const DexFile* dex_file : boot_class_path) {
|
|
if (dex_file->GetOatDexFile() != nullptr &&
|
|
dex_file->GetOatDexFile()->GetOatFile() != nullptr) {
|
|
// If backed by an .oat file, we have already run verification at
|
|
// compile-time. Note that some classes may still have failed
|
|
// verification there if they reference updatable mainline module
|
|
// classes.
|
|
continue;
|
|
}
|
|
for (uint32_t i = 0; i < dex_file->NumClassDefs(); ++i) {
|
|
const dex::ClassDef& class_def = dex_file->GetClassDef(i);
|
|
const char* descriptor = dex_file->GetClassDescriptor(class_def);
|
|
ScopedNullHandle<mirror::ClassLoader> null_loader;
|
|
klass.Assign(linker->FindClass(self, descriptor, null_loader));
|
|
if (klass == nullptr) {
|
|
self->ClearException();
|
|
LOG(WARNING) << "Could not find " << descriptor;
|
|
continue;
|
|
}
|
|
++number_of_classes;
|
|
if (linker->VerifyClass(self, /* verifier_deps= */ nullptr, klass) ==
|
|
verifier::FailureKind::kHardFailure) {
|
|
DCHECK(self->IsExceptionPending());
|
|
LOG(FATAL) << "Methods in the boot classpath failed to verify: "
|
|
<< self->GetException()->Dump();
|
|
}
|
|
CHECK(!self->IsExceptionPending());
|
|
}
|
|
}
|
|
LOG(INFO) << "Verified "
|
|
<< number_of_classes
|
|
<< " classes from mainline modules in "
|
|
<< PrettyDuration(ThreadCpuNanoTime() - start_ns);
|
|
}
|
|
};
|
|
|
|
class ZygoteTask final : public Task {
|
|
public:
|
|
ZygoteTask() {}
|
|
|
|
void Run(Thread* self) override {
|
|
Runtime* runtime = Runtime::Current();
|
|
uint32_t added_to_queue = 0;
|
|
for (gc::space::ImageSpace* space : Runtime::Current()->GetHeap()->GetBootImageSpaces()) {
|
|
const std::string& profile_file = space->GetProfileFile();
|
|
if (profile_file.empty()) {
|
|
continue;
|
|
}
|
|
LOG(INFO) << "JIT Zygote looking at profile " << profile_file;
|
|
|
|
const std::vector<const DexFile*>& boot_class_path =
|
|
runtime->GetClassLinker()->GetBootClassPath();
|
|
ScopedNullHandle<mirror::ClassLoader> null_handle;
|
|
// We add to the queue for zygote so that we can fork processes in-between
|
|
// compilations.
|
|
if (Runtime::Current()->IsPrimaryZygote()) {
|
|
std::string boot_profile = GetBootProfileFile(profile_file);
|
|
// We avoid doing compilation at boot for the secondary zygote, as apps
|
|
// forked from it are not critical for boot.
|
|
added_to_queue += runtime->GetJit()->CompileMethodsFromBootProfile(
|
|
self, boot_class_path, boot_profile, null_handle, /* add_to_queue= */ true);
|
|
}
|
|
added_to_queue += runtime->GetJit()->CompileMethodsFromProfile(
|
|
self, boot_class_path, profile_file, null_handle, /* add_to_queue= */ true);
|
|
}
|
|
|
|
JitCodeCache* code_cache = runtime->GetJit()->GetCodeCache();
|
|
code_cache->GetZygoteMap()->Initialize(added_to_queue);
|
|
}
|
|
|
|
void Finalize() override {
|
|
delete this;
|
|
}
|
|
|
|
private:
|
|
DISALLOW_COPY_AND_ASSIGN(ZygoteTask);
|
|
};
|
|
|
|
class JitProfileTask final : public Task {
|
|
public:
|
|
JitProfileTask(const std::vector<std::unique_ptr<const DexFile>>& dex_files,
|
|
jobject class_loader) {
|
|
ScopedObjectAccess soa(Thread::Current());
|
|
StackHandleScope<1> hs(soa.Self());
|
|
Handle<mirror::ClassLoader> h_loader(hs.NewHandle(
|
|
soa.Decode<mirror::ClassLoader>(class_loader)));
|
|
ClassLinker* class_linker = Runtime::Current()->GetClassLinker();
|
|
for (const auto& dex_file : dex_files) {
|
|
dex_files_.push_back(dex_file.get());
|
|
// Register the dex file so that we can guarantee it doesn't get deleted
|
|
// while reading it during the task.
|
|
class_linker->RegisterDexFile(*dex_file.get(), h_loader.Get());
|
|
}
|
|
// We also create our own global ref to use this class loader later.
|
|
class_loader_ = soa.Vm()->AddGlobalRef(soa.Self(), h_loader.Get());
|
|
}
|
|
|
|
void Run(Thread* self) override {
|
|
ScopedObjectAccess soa(self);
|
|
StackHandleScope<1> hs(self);
|
|
Handle<mirror::ClassLoader> loader = hs.NewHandle<mirror::ClassLoader>(
|
|
soa.Decode<mirror::ClassLoader>(class_loader_));
|
|
|
|
std::string profile = GetProfileFile(dex_files_[0]->GetLocation());
|
|
std::string boot_profile = GetBootProfileFile(profile);
|
|
|
|
Jit* jit = Runtime::Current()->GetJit();
|
|
|
|
jit->CompileMethodsFromBootProfile(
|
|
self,
|
|
dex_files_,
|
|
boot_profile,
|
|
loader,
|
|
/* add_to_queue= */ false);
|
|
|
|
jit->CompileMethodsFromProfile(
|
|
self,
|
|
dex_files_,
|
|
profile,
|
|
loader,
|
|
/* add_to_queue= */ true);
|
|
}
|
|
|
|
void Finalize() override {
|
|
delete this;
|
|
}
|
|
|
|
~JitProfileTask() {
|
|
ScopedObjectAccess soa(Thread::Current());
|
|
soa.Vm()->DeleteGlobalRef(soa.Self(), class_loader_);
|
|
}
|
|
|
|
private:
|
|
std::vector<const DexFile*> dex_files_;
|
|
jobject class_loader_;
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(JitProfileTask);
|
|
};
|
|
|
|
static void CopyIfDifferent(void* s1, const void* s2, size_t n) {
|
|
if (memcmp(s1, s2, n) != 0) {
|
|
memcpy(s1, s2, n);
|
|
}
|
|
}
|
|
|
|
void Jit::MapBootImageMethods() {
|
|
if (Runtime::Current()->IsJavaDebuggable()) {
|
|
LOG(INFO) << "Not mapping boot image methods due to process being debuggable";
|
|
return;
|
|
}
|
|
CHECK_NE(fd_methods_.get(), -1);
|
|
if (!code_cache_->GetZygoteMap()->CanMapBootImageMethods()) {
|
|
LOG(WARNING) << "Not mapping boot image methods due to error from zygote";
|
|
// We don't need the fd anymore.
|
|
fd_methods_.reset();
|
|
return;
|
|
}
|
|
|
|
std::string error_str;
|
|
MemMap child_mapping_methods = MemMap::MapFile(
|
|
fd_methods_size_,
|
|
PROT_READ | PROT_WRITE,
|
|
MAP_PRIVATE,
|
|
fd_methods_,
|
|
/* start= */ 0,
|
|
/* low_4gb= */ false,
|
|
"boot-image-methods",
|
|
&error_str);
|
|
|
|
// We don't need the fd anymore.
|
|
fd_methods_.reset();
|
|
|
|
if (!child_mapping_methods.IsValid()) {
|
|
LOG(WARNING) << "Failed to create child mapping of boot image methods: " << error_str;
|
|
return;
|
|
}
|
|
// We are going to mremap the child mapping into the image:
|
|
//
|
|
// ImageSection ChildMappingMethods
|
|
//
|
|
// section start --> -----------
|
|
// | |
|
|
// | |
|
|
// page_start --> | | <----- -----------
|
|
// | | | |
|
|
// | | | |
|
|
// | | | |
|
|
// | | | |
|
|
// | | | |
|
|
// | | | |
|
|
// | | | |
|
|
// page_end --> | | <----- -----------
|
|
// | |
|
|
// section end --> -----------
|
|
//
|
|
size_t offset = 0;
|
|
for (gc::space::ImageSpace* space : Runtime::Current()->GetHeap()->GetBootImageSpaces()) {
|
|
const ImageHeader& header = space->GetImageHeader();
|
|
const ImageSection& section = header.GetMethodsSection();
|
|
uint8_t* page_start = AlignUp(header.GetImageBegin() + section.Offset(), kPageSize);
|
|
uint8_t* page_end =
|
|
AlignDown(header.GetImageBegin() + section.Offset() + section.Size(), kPageSize);
|
|
if (page_end <= page_start) {
|
|
// Section doesn't contain one aligned entire page.
|
|
continue;
|
|
}
|
|
uint64_t capacity = page_end - page_start;
|
|
// Walk over methods in the boot image, and check for:
|
|
// 1) methods whose class is not initialized in the process, but are in the
|
|
// zygote process. For such methods, we need their entrypoints to be stubs
|
|
// that do the initialization check.
|
|
// 2) native methods whose data pointer is different than the one in the
|
|
// zygote. Such methods may have had custom native implementation provided
|
|
// by JNI RegisterNatives.
|
|
header.VisitPackedArtMethods([&](ArtMethod& method) NO_THREAD_SAFETY_ANALYSIS {
|
|
// Methods in the boot image should never have their single
|
|
// implementation flag set (and therefore never have a `data_` pointing
|
|
// to an ArtMethod for single implementation).
|
|
CHECK(method.IsIntrinsic() || !method.HasSingleImplementationFlag());
|
|
if (method.IsRuntimeMethod()) {
|
|
return;
|
|
}
|
|
|
|
// Pointer to the method we're currently using.
|
|
uint8_t* pointer = reinterpret_cast<uint8_t*>(&method);
|
|
// The data pointer of that method that we want to keep.
|
|
uint8_t* data_pointer = pointer + ArtMethod::DataOffset(kRuntimePointerSize).Int32Value();
|
|
if (method.IsNative() && data_pointer >= page_start && data_pointer < page_end) {
|
|
// The data pointer of the ArtMethod in the shared memory we are going to remap into our
|
|
// own mapping. This is the data that we will see after the remap.
|
|
uint8_t* new_data_pointer =
|
|
child_mapping_methods.Begin() + offset + (data_pointer - page_start);
|
|
CopyIfDifferent(new_data_pointer, data_pointer, sizeof(void*));
|
|
}
|
|
|
|
// The entrypoint of the method we're currently using and that we want to
|
|
// keep.
|
|
uint8_t* entry_point_pointer = pointer +
|
|
ArtMethod::EntryPointFromQuickCompiledCodeOffset(kRuntimePointerSize).Int32Value();
|
|
if (!method.GetDeclaringClassUnchecked()->IsVisiblyInitialized() &&
|
|
method.IsStatic() &&
|
|
!method.IsConstructor() &&
|
|
entry_point_pointer >= page_start &&
|
|
entry_point_pointer < page_end) {
|
|
// The entry point of the ArtMethod in the shared memory we are going to remap into our
|
|
// own mapping. This is the entrypoint that we will see after the remap.
|
|
uint8_t* new_entry_point_pointer =
|
|
child_mapping_methods.Begin() + offset + (entry_point_pointer - page_start);
|
|
CopyIfDifferent(new_entry_point_pointer, entry_point_pointer, sizeof(void*));
|
|
}
|
|
}, space->Begin(), kRuntimePointerSize);
|
|
|
|
// Map the memory in the boot image range.
|
|
if (mremap(child_mapping_methods.Begin() + offset,
|
|
capacity,
|
|
capacity,
|
|
MREMAP_FIXED | MREMAP_MAYMOVE,
|
|
page_start) == MAP_FAILED) {
|
|
PLOG(WARNING) << "Fail to mremap boot image methods for " << space->GetImageFilename();
|
|
}
|
|
offset += capacity;
|
|
}
|
|
|
|
// The private mapping created for this process has been mremaped. We can
|
|
// reset it.
|
|
child_mapping_methods.Reset();
|
|
LOG(INFO) << "Successfully mapped boot image methods";
|
|
}
|
|
|
|
// Return whether a boot image has a profile. This means we'll need to pre-JIT
|
|
// methods in that profile for performance.
|
|
static bool HasImageWithProfile() {
|
|
for (gc::space::ImageSpace* space : Runtime::Current()->GetHeap()->GetBootImageSpaces()) {
|
|
if (!space->GetProfileFile().empty()) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool Jit::InZygoteUsingJit() {
|
|
Runtime* runtime = Runtime::Current();
|
|
return runtime->IsZygote() && HasImageWithProfile() && runtime->UseJitCompilation();
|
|
}
|
|
|
|
void Jit::CreateThreadPool() {
|
|
// There is a DCHECK in the 'AddSamples' method to ensure the tread pool
|
|
// is not null when we instrument.
|
|
|
|
// We need peers as we may report the JIT thread, e.g., in the debugger.
|
|
constexpr bool kJitPoolNeedsPeers = true;
|
|
thread_pool_.reset(new ThreadPool("Jit thread pool", 1, kJitPoolNeedsPeers));
|
|
|
|
Runtime* runtime = Runtime::Current();
|
|
thread_pool_->SetPthreadPriority(
|
|
runtime->IsZygote()
|
|
? options_->GetZygoteThreadPoolPthreadPriority()
|
|
: options_->GetThreadPoolPthreadPriority());
|
|
Start();
|
|
|
|
if (runtime->IsZygote()) {
|
|
// To speed up class lookups, generate a type lookup table for
|
|
// dex files not backed by oat file.
|
|
for (const DexFile* dex_file : runtime->GetClassLinker()->GetBootClassPath()) {
|
|
if (dex_file->GetOatDexFile() == nullptr) {
|
|
TypeLookupTable type_lookup_table = TypeLookupTable::Create(*dex_file);
|
|
type_lookup_tables_.push_back(
|
|
std::make_unique<art::OatDexFile>(std::move(type_lookup_table)));
|
|
dex_file->SetOatDexFile(type_lookup_tables_.back().get());
|
|
}
|
|
}
|
|
|
|
// Add a task that will verify boot classpath jars that were not
|
|
// pre-compiled.
|
|
thread_pool_->AddTask(Thread::Current(), new ZygoteVerificationTask());
|
|
}
|
|
|
|
if (InZygoteUsingJit()) {
|
|
// If we have an image with a profile, request a JIT task to
|
|
// compile all methods in that profile.
|
|
thread_pool_->AddTask(Thread::Current(), new ZygoteTask());
|
|
|
|
// And create mappings to share boot image methods memory from the zygote to
|
|
// child processes.
|
|
|
|
// Compute the total capacity required for the boot image methods.
|
|
uint64_t total_capacity = 0;
|
|
for (gc::space::ImageSpace* space : Runtime::Current()->GetHeap()->GetBootImageSpaces()) {
|
|
const ImageHeader& header = space->GetImageHeader();
|
|
const ImageSection& section = header.GetMethodsSection();
|
|
// Mappings need to be at the page level.
|
|
uint8_t* page_start = AlignUp(header.GetImageBegin() + section.Offset(), kPageSize);
|
|
uint8_t* page_end =
|
|
AlignDown(header.GetImageBegin() + section.Offset() + section.Size(), kPageSize);
|
|
if (page_end > page_start) {
|
|
total_capacity += (page_end - page_start);
|
|
}
|
|
}
|
|
|
|
// Create the child and zygote mappings to the boot image methods.
|
|
if (total_capacity > 0) {
|
|
// Start with '/boot' and end with '.art' to match the pattern recognized
|
|
// by android_os_Debug.cpp for boot images.
|
|
const char* name = "/boot-image-methods.art";
|
|
unique_fd mem_fd = unique_fd(art::memfd_create(name, /* flags= */ MFD_ALLOW_SEALING));
|
|
if (mem_fd.get() == -1) {
|
|
PLOG(WARNING) << "Could not create boot image methods file descriptor";
|
|
return;
|
|
}
|
|
if (ftruncate(mem_fd.get(), total_capacity) != 0) {
|
|
PLOG(WARNING) << "Failed to truncate boot image methods file to " << total_capacity;
|
|
return;
|
|
}
|
|
std::string error_str;
|
|
|
|
// Create the shared mapping eagerly, as this prevents other processes
|
|
// from adding the writable seal.
|
|
zygote_mapping_methods_ = MemMap::MapFile(
|
|
total_capacity,
|
|
PROT_READ | PROT_WRITE,
|
|
MAP_SHARED,
|
|
mem_fd,
|
|
/* start= */ 0,
|
|
/* low_4gb= */ false,
|
|
"boot-image-methods",
|
|
&error_str);
|
|
|
|
if (!zygote_mapping_methods_.IsValid()) {
|
|
LOG(WARNING) << "Failed to create zygote mapping of boot image methods: " << error_str;
|
|
return;
|
|
}
|
|
if (zygote_mapping_methods_.MadviseDontFork() != 0) {
|
|
LOG(WARNING) << "Failed to madvise dont fork boot image methods";
|
|
zygote_mapping_methods_ = MemMap();
|
|
return;
|
|
}
|
|
|
|
// We should use the F_SEAL_FUTURE_WRITE flag, but this has unexpected
|
|
// behavior on private mappings after fork (the mapping becomes shared between
|
|
// parent and children), see b/143833776.
|
|
// We will seal the write once we are done writing to the shared mapping.
|
|
if (fcntl(mem_fd, F_ADD_SEALS, F_SEAL_SHRINK | F_SEAL_GROW) == -1) {
|
|
PLOG(WARNING) << "Failed to seal boot image methods file descriptor";
|
|
zygote_mapping_methods_ = MemMap();
|
|
return;
|
|
}
|
|
fd_methods_ = unique_fd(mem_fd.release());
|
|
fd_methods_size_ = total_capacity;
|
|
}
|
|
}
|
|
}
|
|
|
|
void Jit::RegisterDexFiles(const std::vector<std::unique_ptr<const DexFile>>& dex_files,
|
|
jobject class_loader) {
|
|
if (dex_files.empty()) {
|
|
return;
|
|
}
|
|
Runtime* runtime = Runtime::Current();
|
|
// If the runtime is debuggable, no need to precompile methods.
|
|
if (runtime->IsSystemServer() &&
|
|
UseJitCompilation() &&
|
|
options_->UseProfiledJitCompilation() &&
|
|
HasImageWithProfile() &&
|
|
!runtime->IsJavaDebuggable()) {
|
|
thread_pool_->AddTask(Thread::Current(), new JitProfileTask(dex_files, class_loader));
|
|
}
|
|
}
|
|
|
|
bool Jit::CompileMethodFromProfile(Thread* self,
|
|
ClassLinker* class_linker,
|
|
uint32_t method_idx,
|
|
Handle<mirror::DexCache> dex_cache,
|
|
Handle<mirror::ClassLoader> class_loader,
|
|
bool add_to_queue,
|
|
bool compile_after_boot) {
|
|
ArtMethod* method = class_linker->ResolveMethodWithoutInvokeType(
|
|
method_idx, dex_cache, class_loader);
|
|
if (method == nullptr) {
|
|
self->ClearException();
|
|
return false;
|
|
}
|
|
if (!method->IsCompilable() || !method->IsInvokable()) {
|
|
return false;
|
|
}
|
|
if (method->IsPreCompiled()) {
|
|
// Already seen by another profile.
|
|
return false;
|
|
}
|
|
const void* entry_point = method->GetEntryPointFromQuickCompiledCode();
|
|
if (class_linker->IsQuickToInterpreterBridge(entry_point) ||
|
|
class_linker->IsQuickGenericJniStub(entry_point) ||
|
|
(entry_point == interpreter::GetNterpEntryPoint()) ||
|
|
// We explicitly check for the stub. The trampoline is for methods backed by
|
|
// a .oat file that has a compiled version of the method.
|
|
(entry_point == GetQuickResolutionStub())) {
|
|
method->SetPreCompiled();
|
|
if (!add_to_queue) {
|
|
CompileMethod(method, self, CompilationKind::kOptimized, /* prejit= */ true);
|
|
} else {
|
|
Task* task = new JitCompileTask(
|
|
method, JitCompileTask::TaskKind::kPreCompile, CompilationKind::kOptimized);
|
|
if (compile_after_boot) {
|
|
MutexLock mu(Thread::Current(), boot_completed_lock_);
|
|
if (!boot_completed_) {
|
|
tasks_after_boot_.push_back(task);
|
|
return true;
|
|
}
|
|
DCHECK(tasks_after_boot_.empty());
|
|
}
|
|
thread_pool_->AddTask(self, task);
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
uint32_t Jit::CompileMethodsFromBootProfile(
|
|
Thread* self,
|
|
const std::vector<const DexFile*>& dex_files,
|
|
const std::string& profile_file,
|
|
Handle<mirror::ClassLoader> class_loader,
|
|
bool add_to_queue) {
|
|
unix_file::FdFile profile(profile_file.c_str(), O_RDONLY, true);
|
|
|
|
if (profile.Fd() == -1) {
|
|
PLOG(WARNING) << "No boot profile: " << profile_file;
|
|
return 0u;
|
|
}
|
|
|
|
ProfileBootInfo profile_info;
|
|
if (!profile_info.Load(profile.Fd(), dex_files)) {
|
|
LOG(ERROR) << "Could not load profile file: " << profile_file;
|
|
return 0u;
|
|
}
|
|
|
|
ScopedObjectAccess soa(self);
|
|
VariableSizedHandleScope handles(self);
|
|
std::vector<Handle<mirror::DexCache>> dex_caches;
|
|
ClassLinker* class_linker = Runtime::Current()->GetClassLinker();
|
|
for (const DexFile* dex_file : profile_info.GetDexFiles()) {
|
|
dex_caches.push_back(handles.NewHandle(class_linker->FindDexCache(self, *dex_file)));
|
|
}
|
|
|
|
uint32_t added_to_queue = 0;
|
|
for (const std::pair<uint32_t, uint32_t>& pair : profile_info.GetMethods()) {
|
|
if (CompileMethodFromProfile(self,
|
|
class_linker,
|
|
pair.second,
|
|
dex_caches[pair.first],
|
|
class_loader,
|
|
add_to_queue,
|
|
/*compile_after_boot=*/false)) {
|
|
++added_to_queue;
|
|
}
|
|
}
|
|
return added_to_queue;
|
|
}
|
|
|
|
uint32_t Jit::CompileMethodsFromProfile(
|
|
Thread* self,
|
|
const std::vector<const DexFile*>& dex_files,
|
|
const std::string& profile_file,
|
|
Handle<mirror::ClassLoader> class_loader,
|
|
bool add_to_queue) {
|
|
|
|
if (profile_file.empty()) {
|
|
LOG(WARNING) << "Expected a profile file in JIT zygote mode";
|
|
return 0u;
|
|
}
|
|
|
|
// We don't generate boot profiles on device, therefore we don't
|
|
// need to lock the file.
|
|
unix_file::FdFile profile(profile_file.c_str(), O_RDONLY, true);
|
|
|
|
if (profile.Fd() == -1) {
|
|
PLOG(WARNING) << "No profile: " << profile_file;
|
|
return 0u;
|
|
}
|
|
|
|
ProfileCompilationInfo profile_info;
|
|
if (!profile_info.Load(profile.Fd())) {
|
|
LOG(ERROR) << "Could not load profile file";
|
|
return 0u;
|
|
}
|
|
ScopedObjectAccess soa(self);
|
|
StackHandleScope<1> hs(self);
|
|
MutableHandle<mirror::DexCache> dex_cache = hs.NewHandle<mirror::DexCache>(nullptr);
|
|
ClassLinker* class_linker = Runtime::Current()->GetClassLinker();
|
|
uint32_t added_to_queue = 0u;
|
|
for (const DexFile* dex_file : dex_files) {
|
|
if (LocationIsOnArtModule(dex_file->GetLocation().c_str())) {
|
|
// The ART module jars are already preopted.
|
|
continue;
|
|
}
|
|
|
|
std::set<dex::TypeIndex> class_types;
|
|
std::set<uint16_t> all_methods;
|
|
if (!profile_info.GetClassesAndMethods(*dex_file,
|
|
&class_types,
|
|
&all_methods,
|
|
&all_methods,
|
|
&all_methods)) {
|
|
// This means the profile file did not reference the dex file, which is the case
|
|
// if there's no classes and methods of that dex file in the profile.
|
|
continue;
|
|
}
|
|
dex_cache.Assign(class_linker->FindDexCache(self, *dex_file));
|
|
CHECK(dex_cache != nullptr) << "Could not find dex cache for " << dex_file->GetLocation();
|
|
|
|
for (uint16_t method_idx : all_methods) {
|
|
if (CompileMethodFromProfile(self,
|
|
class_linker,
|
|
method_idx,
|
|
dex_cache,
|
|
class_loader,
|
|
add_to_queue,
|
|
/*compile_after_boot=*/true)) {
|
|
++added_to_queue;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Add a task to run when all compilation is done.
|
|
JitDoneCompilingProfileTask* task = new JitDoneCompilingProfileTask(dex_files);
|
|
MutexLock mu(Thread::Current(), boot_completed_lock_);
|
|
if (!boot_completed_) {
|
|
tasks_after_boot_.push_back(task);
|
|
} else {
|
|
DCHECK(tasks_after_boot_.empty());
|
|
thread_pool_->AddTask(self, task);
|
|
}
|
|
return added_to_queue;
|
|
}
|
|
|
|
bool Jit::IgnoreSamplesForMethod(ArtMethod* method) REQUIRES_SHARED(Locks::mutator_lock_) {
|
|
if (method->IsClassInitializer() || !method->IsCompilable() || method->IsPreCompiled()) {
|
|
// We do not want to compile such methods.
|
|
return true;
|
|
}
|
|
if (method->IsNative()) {
|
|
ObjPtr<mirror::Class> klass = method->GetDeclaringClass();
|
|
if (klass == GetClassRoot<mirror::MethodHandle>() ||
|
|
klass == GetClassRoot<mirror::VarHandle>()) {
|
|
// MethodHandle and VarHandle invocation methods are required to throw an
|
|
// UnsupportedOperationException if invoked reflectively. We achieve this by having native
|
|
// implementations that raise the exception. We need to disable JIT compilation of these JNI
|
|
// methods as it can lead to transitioning between JIT compiled JNI stubs and generic JNI
|
|
// stubs. Since these stubs have different stack representations we can then crash in stack
|
|
// walking (b/78151261).
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool Jit::MaybeCompileMethod(Thread* self,
|
|
ArtMethod* method,
|
|
uint32_t old_count,
|
|
uint32_t new_count,
|
|
bool with_backedges) {
|
|
if (thread_pool_ == nullptr) {
|
|
return false;
|
|
}
|
|
if (UNLIKELY(method->IsPreCompiled()) && !with_backedges /* don't check for OSR */) {
|
|
if (!NeedsClinitCheckBeforeCall(method) ||
|
|
method->GetDeclaringClass()->IsVisiblyInitialized()) {
|
|
const void* entry_point = code_cache_->GetSavedEntryPointOfPreCompiledMethod(method);
|
|
if (entry_point != nullptr) {
|
|
Runtime::Current()->GetInstrumentation()->UpdateMethodsCode(method, entry_point);
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (IgnoreSamplesForMethod(method)) {
|
|
return false;
|
|
}
|
|
if (HotMethodThreshold() == 0) {
|
|
// Tests might request JIT on first use (compiled synchronously in the interpreter).
|
|
return false;
|
|
}
|
|
DCHECK_GT(WarmMethodThreshold(), 0);
|
|
DCHECK_GT(HotMethodThreshold(), WarmMethodThreshold());
|
|
DCHECK_GT(OSRMethodThreshold(), HotMethodThreshold());
|
|
DCHECK_GE(PriorityThreadWeight(), 1);
|
|
DCHECK_LE(PriorityThreadWeight(), HotMethodThreshold());
|
|
|
|
if (UseJitCompilation()) {
|
|
if (old_count < HotMethodThreshold() && new_count >= HotMethodThreshold()) {
|
|
if (!code_cache_->ContainsPc(method->GetEntryPointFromQuickCompiledCode())) {
|
|
DCHECK(thread_pool_ != nullptr);
|
|
thread_pool_->AddTask(
|
|
self,
|
|
new JitCompileTask(
|
|
method, JitCompileTask::TaskKind::kCompile, CompilationKind::kBaseline));
|
|
}
|
|
}
|
|
if (old_count < OSRMethodThreshold() && new_count >= OSRMethodThreshold()) {
|
|
if (!with_backedges) {
|
|
return false;
|
|
}
|
|
DCHECK(!method->IsNative()); // No back edges reported for native methods.
|
|
if (!code_cache_->IsOsrCompiled(method)) {
|
|
DCHECK(thread_pool_ != nullptr);
|
|
thread_pool_->AddTask(
|
|
self,
|
|
new JitCompileTask(method, JitCompileTask::TaskKind::kCompile, CompilationKind::kOsr));
|
|
}
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
void Jit::EnqueueOptimizedCompilation(ArtMethod* method, Thread* self) {
|
|
if (thread_pool_ == nullptr) {
|
|
return;
|
|
}
|
|
// We arrive here after a baseline compiled code has reached its baseline
|
|
// hotness threshold. If we're not only using the baseline compiler, enqueue a compilation
|
|
// task that will compile optimize the method.
|
|
if (!options_->UseBaselineCompiler()) {
|
|
thread_pool_->AddTask(
|
|
self,
|
|
new JitCompileTask(method,
|
|
JitCompileTask::TaskKind::kCompile,
|
|
CompilationKind::kOptimized));
|
|
}
|
|
}
|
|
|
|
class ScopedSetRuntimeThread {
|
|
public:
|
|
explicit ScopedSetRuntimeThread(Thread* self)
|
|
: self_(self), was_runtime_thread_(self_->IsRuntimeThread()) {
|
|
self_->SetIsRuntimeThread(true);
|
|
}
|
|
|
|
~ScopedSetRuntimeThread() {
|
|
self_->SetIsRuntimeThread(was_runtime_thread_);
|
|
}
|
|
|
|
private:
|
|
Thread* self_;
|
|
bool was_runtime_thread_;
|
|
};
|
|
|
|
void Jit::MethodEntered(Thread* thread, ArtMethod* method) {
|
|
Runtime* runtime = Runtime::Current();
|
|
if (UNLIKELY(runtime->UseJitCompilation() && JitAtFirstUse())) {
|
|
ArtMethod* np_method = method->GetInterfaceMethodIfProxy(kRuntimePointerSize);
|
|
if (np_method->IsCompilable()) {
|
|
// TODO(ngeoffray): For JIT at first use, use kPreCompile. Currently we don't due to
|
|
// conflicts with jitzygote optimizations.
|
|
JitCompileTask compile_task(
|
|
method, JitCompileTask::TaskKind::kCompile, CompilationKind::kOptimized);
|
|
// Fake being in a runtime thread so that class-load behavior will be the same as normal jit.
|
|
ScopedSetRuntimeThread ssrt(thread);
|
|
compile_task.Run(thread);
|
|
}
|
|
return;
|
|
}
|
|
|
|
AddSamples(thread, method, 1, /* with_backedges= */false);
|
|
}
|
|
|
|
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();
|
|
}
|
|
}
|
|
|
|
static void* RunPollingThread(void* arg) {
|
|
Jit* jit = reinterpret_cast<Jit*>(arg);
|
|
do {
|
|
sleep(10);
|
|
} while (!jit->GetCodeCache()->GetZygoteMap()->IsCompilationNotified());
|
|
|
|
// We will suspend other threads: we can only do that if we're attached to the
|
|
// runtime.
|
|
Runtime* runtime = Runtime::Current();
|
|
bool thread_attached = runtime->AttachCurrentThread(
|
|
"BootImagePollingThread",
|
|
/* as_daemon= */ true,
|
|
/* thread_group= */ nullptr,
|
|
/* create_peer= */ false);
|
|
CHECK(thread_attached);
|
|
|
|
{
|
|
// Prevent other threads from running while we are remapping the boot image
|
|
// ArtMethod's. Native threads might still be running, but they cannot
|
|
// change the contents of ArtMethod's.
|
|
ScopedSuspendAll ssa(__FUNCTION__);
|
|
runtime->GetJit()->MapBootImageMethods();
|
|
}
|
|
|
|
Runtime::Current()->DetachCurrentThread();
|
|
return nullptr;
|
|
}
|
|
|
|
void Jit::PostForkChildAction(bool is_system_server, bool is_zygote) {
|
|
// Clear the potential boot tasks inherited from the zygote.
|
|
{
|
|
MutexLock mu(Thread::Current(), boot_completed_lock_);
|
|
tasks_after_boot_.clear();
|
|
}
|
|
|
|
Runtime* const runtime = Runtime::Current();
|
|
// Check if we'll need to remap the boot image methods.
|
|
if (!is_zygote && fd_methods_ != -1) {
|
|
// Create a thread that will poll the status of zygote compilation, and map
|
|
// the private mapping of boot image methods.
|
|
// For child zygote, we instead query IsCompilationNotified() post zygote fork.
|
|
zygote_mapping_methods_.ResetInForkedProcess();
|
|
pthread_t polling_thread;
|
|
pthread_attr_t attr;
|
|
CHECK_PTHREAD_CALL(pthread_attr_init, (&attr), "new thread");
|
|
CHECK_PTHREAD_CALL(pthread_attr_setdetachstate, (&attr, PTHREAD_CREATE_DETACHED),
|
|
"PTHREAD_CREATE_DETACHED");
|
|
CHECK_PTHREAD_CALL(
|
|
pthread_create,
|
|
(&polling_thread, &attr, RunPollingThread, reinterpret_cast<void*>(this)),
|
|
"Methods maps thread");
|
|
}
|
|
|
|
if (is_zygote || runtime->IsSafeMode()) {
|
|
// Delete the thread pool, we are not going to JIT.
|
|
thread_pool_.reset(nullptr);
|
|
return;
|
|
}
|
|
// At this point, the compiler options have been adjusted to the particular configuration
|
|
// of the forked child. Parse them again.
|
|
jit_compiler_->ParseCompilerOptions();
|
|
|
|
// Adjust the status of code cache collection: the status from zygote was to not collect.
|
|
code_cache_->SetGarbageCollectCode(!jit_compiler_->GenerateDebugInfo() &&
|
|
!Runtime::Current()->GetInstrumentation()->AreExitStubsInstalled());
|
|
|
|
if (is_system_server && HasImageWithProfile()) {
|
|
// Disable garbage collection: we don't want it to delete methods we're compiling
|
|
// through boot and system server profiles.
|
|
// TODO(ngeoffray): Fix this so we still collect deoptimized and unused code.
|
|
code_cache_->SetGarbageCollectCode(false);
|
|
}
|
|
|
|
// We do this here instead of PostZygoteFork, as NativeDebugInfoPostFork only
|
|
// applies to a child.
|
|
NativeDebugInfoPostFork();
|
|
}
|
|
|
|
void Jit::PreZygoteFork() {
|
|
if (thread_pool_ == nullptr) {
|
|
return;
|
|
}
|
|
thread_pool_->DeleteThreads();
|
|
|
|
NativeDebugInfoPreFork();
|
|
}
|
|
|
|
void Jit::PostZygoteFork() {
|
|
Runtime* runtime = Runtime::Current();
|
|
if (thread_pool_ == nullptr) {
|
|
// If this is a child zygote, check if we need to remap the boot image
|
|
// methods.
|
|
if (runtime->IsZygote() &&
|
|
fd_methods_ != -1 &&
|
|
code_cache_->GetZygoteMap()->IsCompilationNotified()) {
|
|
ScopedSuspendAll ssa(__FUNCTION__);
|
|
MapBootImageMethods();
|
|
}
|
|
return;
|
|
}
|
|
if (runtime->IsZygote() && code_cache_->GetZygoteMap()->IsCompilationDoneButNotNotified()) {
|
|
// Copy the boot image methods data to the mappings we created to share
|
|
// with the children. We do this here as we are the only thread running and
|
|
// we don't risk other threads concurrently updating the ArtMethod's.
|
|
CHECK_EQ(GetTaskCount(), 1);
|
|
NotifyZygoteCompilationDone();
|
|
CHECK(code_cache_->GetZygoteMap()->IsCompilationNotified());
|
|
}
|
|
thread_pool_->CreateThreads();
|
|
thread_pool_->SetPthreadPriority(
|
|
runtime->IsZygote()
|
|
? options_->GetZygoteThreadPoolPthreadPriority()
|
|
: options_->GetThreadPoolPthreadPriority());
|
|
}
|
|
|
|
void Jit::BootCompleted() {
|
|
Thread* self = Thread::Current();
|
|
std::deque<Task*> tasks;
|
|
{
|
|
MutexLock mu(self, boot_completed_lock_);
|
|
tasks = std::move(tasks_after_boot_);
|
|
boot_completed_ = true;
|
|
}
|
|
for (Task* task : tasks) {
|
|
thread_pool_->AddTask(self, task);
|
|
}
|
|
}
|
|
|
|
bool Jit::CanEncodeMethod(ArtMethod* method, bool is_for_shared_region) const {
|
|
return !is_for_shared_region ||
|
|
Runtime::Current()->GetHeap()->ObjectIsInBootImageSpace(method->GetDeclaringClass());
|
|
}
|
|
|
|
bool Jit::CanEncodeClass(ObjPtr<mirror::Class> cls, bool is_for_shared_region) const {
|
|
return !is_for_shared_region || Runtime::Current()->GetHeap()->ObjectIsInBootImageSpace(cls);
|
|
}
|
|
|
|
bool Jit::CanEncodeString(ObjPtr<mirror::String> string, bool is_for_shared_region) const {
|
|
return !is_for_shared_region || Runtime::Current()->GetHeap()->ObjectIsInBootImageSpace(string);
|
|
}
|
|
|
|
bool Jit::CanAssumeInitialized(ObjPtr<mirror::Class> cls, bool is_for_shared_region) const {
|
|
if (!is_for_shared_region) {
|
|
return cls->IsInitialized();
|
|
} else {
|
|
// Look up the class status in the oat file.
|
|
const DexFile& dex_file = *cls->GetDexCache()->GetDexFile();
|
|
const OatDexFile* oat_dex_file = dex_file.GetOatDexFile();
|
|
// In case we run without an image there won't be a backing oat file.
|
|
if (oat_dex_file == nullptr || oat_dex_file->GetOatFile() == nullptr) {
|
|
return false;
|
|
}
|
|
uint16_t class_def_index = cls->GetDexClassDefIndex();
|
|
return oat_dex_file->GetOatClass(class_def_index).GetStatus() >= ClassStatus::kInitialized;
|
|
}
|
|
}
|
|
|
|
void Jit::EnqueueCompilationFromNterp(ArtMethod* method, Thread* self) {
|
|
if (thread_pool_ == nullptr) {
|
|
return;
|
|
}
|
|
if (GetCodeCache()->ContainsPc(method->GetEntryPointFromQuickCompiledCode())) {
|
|
// If we already have compiled code for it, nterp may be stuck in a loop.
|
|
// Compile OSR.
|
|
thread_pool_->AddTask(
|
|
self,
|
|
new JitCompileTask(method, JitCompileTask::TaskKind::kCompile, CompilationKind::kOsr));
|
|
return;
|
|
}
|
|
if (GetCodeCache()->CanAllocateProfilingInfo()) {
|
|
thread_pool_->AddTask(
|
|
self,
|
|
new JitCompileTask(method, JitCompileTask::TaskKind::kCompile, CompilationKind::kBaseline));
|
|
} else {
|
|
thread_pool_->AddTask(
|
|
self,
|
|
new JitCompileTask(method,
|
|
JitCompileTask::TaskKind::kCompile,
|
|
CompilationKind::kOptimized));
|
|
}
|
|
}
|
|
|
|
} // namespace jit
|
|
} // namespace art
|