in runtime/runtime.cc [938:1319]
bool Runtime::Init(RuntimeArgumentMap&& runtime_options_in) {
// (b/30160149): protect subprocesses from modifications to LD_LIBRARY_PATH, etc.
// Take a snapshot of the environment at the time the runtime was created, for use by Exec, etc.
env_snapshot_.TakeSnapshot();
RuntimeArgumentMap runtime_options(std::move(runtime_options_in));
ScopedTrace trace(__FUNCTION__);
CHECK_EQ(sysconf(_SC_PAGE_SIZE), kPageSize);
MemMap::Init();
using Opt = RuntimeArgumentMap;
VLOG(startup) << "Runtime::Init -verbose:startup enabled";
QuasiAtomic::Startup();
oat_file_manager_ = new OatFileManager;
Thread::SetSensitiveThreadHook(runtime_options.GetOrDefault(Opt::HookIsSensitiveThread));
Monitor::Init(runtime_options.GetOrDefault(Opt::LockProfThreshold));
boot_class_path_string_ = runtime_options.ReleaseOrDefault(Opt::BootClassPath);
class_path_string_ = runtime_options.ReleaseOrDefault(Opt::ClassPath);
properties_ = runtime_options.ReleaseOrDefault(Opt::PropertiesList);
compiler_callbacks_ = runtime_options.GetOrDefault(Opt::CompilerCallbacksPtr);
patchoat_executable_ = runtime_options.ReleaseOrDefault(Opt::PatchOat);
must_relocate_ = runtime_options.GetOrDefault(Opt::Relocate);
is_zygote_ = runtime_options.Exists(Opt::Zygote);
is_explicit_gc_disabled_ = runtime_options.Exists(Opt::DisableExplicitGC);
dex2oat_enabled_ = runtime_options.GetOrDefault(Opt::Dex2Oat);
image_dex2oat_enabled_ = runtime_options.GetOrDefault(Opt::ImageDex2Oat);
dump_native_stack_on_sig_quit_ = runtime_options.GetOrDefault(Opt::DumpNativeStackOnSigQuit);
vfprintf_ = runtime_options.GetOrDefault(Opt::HookVfprintf);
exit_ = runtime_options.GetOrDefault(Opt::HookExit);
abort_ = runtime_options.GetOrDefault(Opt::HookAbort);
default_stack_size_ = runtime_options.GetOrDefault(Opt::StackSize);
stack_trace_file_ = runtime_options.ReleaseOrDefault(Opt::StackTraceFile);
compiler_executable_ = runtime_options.ReleaseOrDefault(Opt::Compiler);
compiler_options_ = runtime_options.ReleaseOrDefault(Opt::CompilerOptions);
image_compiler_options_ = runtime_options.ReleaseOrDefault(Opt::ImageCompilerOptions);
image_location_ = runtime_options.GetOrDefault(Opt::Image);
max_spins_before_thin_lock_inflation_ =
runtime_options.GetOrDefault(Opt::MaxSpinsBeforeThinLockInflation);
monitor_list_ = new MonitorList;
monitor_pool_ = MonitorPool::Create();
thread_list_ = new ThreadList;
intern_table_ = new InternTable;
verify_ = runtime_options.GetOrDefault(Opt::Verify);
allow_dex_file_fallback_ = !runtime_options.Exists(Opt::NoDexFileFallback);
no_sig_chain_ = runtime_options.Exists(Opt::NoSigChain);
force_native_bridge_ = runtime_options.Exists(Opt::ForceNativeBridge);
Split(runtime_options.GetOrDefault(Opt::CpuAbiList), ',', &cpu_abilist_);
fingerprint_ = runtime_options.ReleaseOrDefault(Opt::Fingerprint);
if (runtime_options.GetOrDefault(Opt::Interpret)) {
GetInstrumentation()->ForceInterpretOnly();
}
zygote_max_failed_boots_ = runtime_options.GetOrDefault(Opt::ZygoteMaxFailedBoots);
experimental_flags_ = runtime_options.GetOrDefault(Opt::Experimental);
is_low_memory_mode_ = runtime_options.Exists(Opt::LowMemoryMode);
{
CompilerFilter::Filter filter;
std::string filter_str = runtime_options.GetOrDefault(Opt::OatFileManagerCompilerFilter);
if (!CompilerFilter::ParseCompilerFilter(filter_str.c_str(), &filter)) {
LOG(ERROR) << "Cannot parse compiler filter " << filter_str;
return false;
}
OatFileManager::SetCompilerFilter(filter);
}
XGcOption xgc_option = runtime_options.GetOrDefault(Opt::GcOption);
heap_ = new gc::Heap(runtime_options.GetOrDefault(Opt::MemoryInitialSize),
runtime_options.GetOrDefault(Opt::HeapGrowthLimit),
runtime_options.GetOrDefault(Opt::HeapMinFree),
runtime_options.GetOrDefault(Opt::HeapMaxFree),
runtime_options.GetOrDefault(Opt::HeapTargetUtilization),
runtime_options.GetOrDefault(Opt::ForegroundHeapGrowthMultiplier),
runtime_options.GetOrDefault(Opt::MemoryMaximumSize),
runtime_options.GetOrDefault(Opt::NonMovingSpaceCapacity),
runtime_options.GetOrDefault(Opt::Image),
runtime_options.GetOrDefault(Opt::ImageInstructionSet),
xgc_option.collector_type_,
runtime_options.GetOrDefault(Opt::BackgroundGc),
runtime_options.GetOrDefault(Opt::LargeObjectSpace),
runtime_options.GetOrDefault(Opt::LargeObjectThreshold),
runtime_options.GetOrDefault(Opt::ParallelGCThreads),
runtime_options.GetOrDefault(Opt::ConcGCThreads),
runtime_options.Exists(Opt::LowMemoryMode),
runtime_options.GetOrDefault(Opt::LongPauseLogThreshold),
runtime_options.GetOrDefault(Opt::LongGCLogThreshold),
runtime_options.Exists(Opt::IgnoreMaxFootprint),
runtime_options.GetOrDefault(Opt::UseTLAB),
xgc_option.verify_pre_gc_heap_,
xgc_option.verify_pre_sweeping_heap_,
xgc_option.verify_post_gc_heap_,
xgc_option.verify_pre_gc_rosalloc_,
xgc_option.verify_pre_sweeping_rosalloc_,
xgc_option.verify_post_gc_rosalloc_,
xgc_option.gcstress_,
runtime_options.GetOrDefault(Opt::EnableHSpaceCompactForOOM),
runtime_options.GetOrDefault(Opt::HSpaceCompactForOOMMinIntervalsMs));
if (!heap_->HasBootImageSpace() && !allow_dex_file_fallback_) {
LOG(ERROR) << "Dex file fallback disabled, cannot continue without image.";
return false;
}
dump_gc_performance_on_shutdown_ = runtime_options.Exists(Opt::DumpGCPerformanceOnShutdown);
if (runtime_options.Exists(Opt::JdwpOptions)) {
Dbg::ConfigureJdwp(runtime_options.GetOrDefault(Opt::JdwpOptions));
}
jit_options_.reset(jit::JitOptions::CreateFromRuntimeArguments(runtime_options));
if (IsAotCompiler()) {
// If we are already the compiler at this point, we must be dex2oat. Don't create the jit in
// this case.
// If runtime_options doesn't have UseJIT set to true then CreateFromRuntimeArguments returns
// null and we don't create the jit.
jit_options_->SetUseJitCompilation(false);
jit_options_->SetSaveProfilingInfo(false);
}
// Allocate a global table of boxed lambda objects <-> closures.
lambda_box_table_ = MakeUnique<lambda::BoxTable>();
// Use MemMap arena pool for jit, malloc otherwise. Malloc arenas are faster to allocate but
// can't be trimmed as easily.
const bool use_malloc = IsAotCompiler();
arena_pool_.reset(new ArenaPool(use_malloc, /* low_4gb */ false));
jit_arena_pool_.reset(
new ArenaPool(/* use_malloc */ false, /* low_4gb */ false, "CompilerMetadata"));
if (IsAotCompiler() && Is64BitInstructionSet(kRuntimeISA)) {
// 4gb, no malloc. Explanation in header.
low_4gb_arena_pool_.reset(new ArenaPool(/* use_malloc */ false, /* low_4gb */ true));
}
linear_alloc_.reset(CreateLinearAlloc());
BlockSignals();
InitPlatformSignalHandlers();
// Change the implicit checks flags based on runtime architecture.
switch (kRuntimeISA) {
case kArm:
case kThumb2:
case kX86:
case kArm64:
case kX86_64:
case kMips:
case kMips64:
implicit_null_checks_ = true;
// Installing stack protection does not play well with valgrind.
implicit_so_checks_ = !(RUNNING_ON_MEMORY_TOOL && kMemoryToolIsValgrind);
break;
default:
// Keep the defaults.
break;
}
if (!no_sig_chain_) {
// Dex2Oat's Runtime does not need the signal chain or the fault handler.
// Initialize the signal chain so that any calls to sigaction get
// correctly routed to the next in the chain regardless of whether we
// have claimed the signal or not.
InitializeSignalChain();
if (implicit_null_checks_ || implicit_so_checks_ || implicit_suspend_checks_) {
fault_manager.Init();
// These need to be in a specific order. The null point check handler must be
// after the suspend check and stack overflow check handlers.
//
// Note: the instances attach themselves to the fault manager and are handled by it. The manager
// will delete the instance on Shutdown().
if (implicit_suspend_checks_) {
new SuspensionHandler(&fault_manager);
}
if (implicit_so_checks_) {
new StackOverflowHandler(&fault_manager);
}
if (implicit_null_checks_) {
new NullPointerHandler(&fault_manager);
}
if (kEnableJavaStackTraceHandler) {
new JavaStackTraceHandler(&fault_manager);
}
}
}
java_vm_ = new JavaVMExt(this, runtime_options);
Thread::Startup();
// ClassLinker needs an attached thread, but we can't fully attach a thread without creating
// objects. We can't supply a thread group yet; it will be fixed later. Since we are the main
// thread, we do not get a java peer.
Thread* self = Thread::Attach("main", false, nullptr, false);
CHECK_EQ(self->GetThreadId(), ThreadList::kMainThreadId);
CHECK(self != nullptr);
self->SetCanCallIntoJava(!IsAotCompiler());
// Set us to runnable so tools using a runtime can allocate and GC by default
self->TransitionFromSuspendedToRunnable();
// Now we're attached, we can take the heap locks and validate the heap.
GetHeap()->EnableObjectValidation();
CHECK_GE(GetHeap()->GetContinuousSpaces().size(), 1U);
class_linker_ = new ClassLinker(intern_table_);
if (GetHeap()->HasBootImageSpace()) {
std::string error_msg;
bool result = class_linker_->InitFromBootImage(&error_msg);
if (!result) {
LOG(ERROR) << "Could not initialize from image: " << error_msg;
return false;
}
if (kIsDebugBuild) {
for (auto image_space : GetHeap()->GetBootImageSpaces()) {
image_space->VerifyImageAllocations();
}
}
if (boot_class_path_string_.empty()) {
// The bootclasspath is not explicitly specified: construct it from the loaded dex files.
const std::vector<const DexFile*>& boot_class_path = GetClassLinker()->GetBootClassPath();
std::vector<std::string> dex_locations;
dex_locations.reserve(boot_class_path.size());
for (const DexFile* dex_file : boot_class_path) {
dex_locations.push_back(dex_file->GetLocation());
}
boot_class_path_string_ = Join(dex_locations, ':');
}
{
ScopedTrace trace2("AddImageStringsToTable");
GetInternTable()->AddImagesStringsToTable(heap_->GetBootImageSpaces());
}
{
ScopedTrace trace2("MoveImageClassesToClassTable");
GetClassLinker()->AddBootImageClassesToClassTable();
}
} else {
std::vector<std::string> dex_filenames;
Split(boot_class_path_string_, ':', &dex_filenames);
std::vector<std::string> dex_locations;
if (!runtime_options.Exists(Opt::BootClassPathLocations)) {
dex_locations = dex_filenames;
} else {
dex_locations = runtime_options.GetOrDefault(Opt::BootClassPathLocations);
CHECK_EQ(dex_filenames.size(), dex_locations.size());
}
std::vector<std::unique_ptr<const DexFile>> boot_class_path;
if (runtime_options.Exists(Opt::BootClassPathDexList)) {
boot_class_path.swap(*runtime_options.GetOrDefault(Opt::BootClassPathDexList));
} else {
OpenDexFiles(dex_filenames,
dex_locations,
runtime_options.GetOrDefault(Opt::Image),
&boot_class_path);
}
instruction_set_ = runtime_options.GetOrDefault(Opt::ImageInstructionSet);
std::string error_msg;
if (!class_linker_->InitWithoutImage(std::move(boot_class_path), &error_msg)) {
LOG(ERROR) << "Could not initialize without image: " << error_msg;
return false;
}
// TODO: Should we move the following to InitWithoutImage?
SetInstructionSet(instruction_set_);
for (int i = 0; i < Runtime::kLastCalleeSaveType; i++) {
Runtime::CalleeSaveType type = Runtime::CalleeSaveType(i);
if (!HasCalleeSaveMethod(type)) {
SetCalleeSaveMethod(CreateCalleeSaveMethod(), type);
}
}
}
CHECK(class_linker_ != nullptr);
verifier::MethodVerifier::Init();
if (runtime_options.Exists(Opt::MethodTrace)) {
trace_config_.reset(new TraceConfig());
trace_config_->trace_file = runtime_options.ReleaseOrDefault(Opt::MethodTraceFile);
trace_config_->trace_file_size = runtime_options.ReleaseOrDefault(Opt::MethodTraceFileSize);
trace_config_->trace_mode = Trace::TraceMode::kMethodTracing;
trace_config_->trace_output_mode = runtime_options.Exists(Opt::MethodTraceStreaming) ?
Trace::TraceOutputMode::kStreaming :
Trace::TraceOutputMode::kFile;
}
{
auto&& profiler_options = runtime_options.ReleaseOrDefault(Opt::ProfilerOpts);
profile_output_filename_ = profiler_options.output_file_name_;
// TODO: Don't do this, just change ProfilerOptions to include the output file name?
ProfilerOptions other_options(
profiler_options.enabled_,
profiler_options.period_s_,
profiler_options.duration_s_,
profiler_options.interval_us_,
profiler_options.backoff_coefficient_,
profiler_options.start_immediately_,
profiler_options.top_k_threshold_,
profiler_options.top_k_change_threshold_,
profiler_options.profile_type_,
profiler_options.max_stack_depth_);
profiler_options_ = other_options;
}
// TODO: move this to just be an Trace::Start argument
Trace::SetDefaultClockSource(runtime_options.GetOrDefault(Opt::ProfileClock));
// Pre-allocate an OutOfMemoryError for the double-OOME case.
self->ThrowNewException("Ljava/lang/OutOfMemoryError;",
"OutOfMemoryError thrown while trying to throw OutOfMemoryError; "
"no stack trace available");
pre_allocated_OutOfMemoryError_ = GcRoot<mirror::Throwable>(self->GetException());
self->ClearException();
// Pre-allocate a NoClassDefFoundError for the common case of failing to find a system class
// ahead of checking the application's class loader.
self->ThrowNewException("Ljava/lang/NoClassDefFoundError;",
"Class not found using the boot class loader; no stack trace available");
pre_allocated_NoClassDefFoundError_ = GcRoot<mirror::Throwable>(self->GetException());
self->ClearException();
// Look for a native bridge.
//
// The intended flow here is, in the case of a running system:
//
// Runtime::Init() (zygote):
// LoadNativeBridge -> dlopen from cmd line parameter.
// |
// V
// Runtime::Start() (zygote):
// No-op wrt native bridge.
// |
// | start app
// V
// DidForkFromZygote(action)
// action = kUnload -> dlclose native bridge.
// action = kInitialize -> initialize library
//
//
// The intended flow here is, in the case of a simple dalvikvm call:
//
// Runtime::Init():
// LoadNativeBridge -> dlopen from cmd line parameter.
// |
// V
// Runtime::Start():
// DidForkFromZygote(kInitialize) -> try to initialize any native bridge given.
// No-op wrt native bridge.
{
std::string native_bridge_file_name = runtime_options.ReleaseOrDefault(Opt::NativeBridge);
is_native_bridge_loaded_ = LoadNativeBridge(native_bridge_file_name);
}
VLOG(startup) << "Runtime::Init exiting";
return true;
}