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sdk/runtime/vm/object_store.cc
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Ryan Macnak 68d178f223 [vm] Remove FLAG_support_service and FLAG_support_reload, superseded by PRODUCT define. 
When these were originally added, we thought we would be able to use them in place of ifdefs and rely on the compiler optimizations and linker GC to remove things. This turned out not to reliably remove what we wanted removed, so we ended up with the ifdefs anyway.

Change-Id: I62e74d60d92b18a688b9dffaf77b1440c10a07ff
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/134402
Commit-Queue: Ryan Macnak <rmacnak@google.com>
Reviewed-by: Ben Konyi <bkonyi@google.com>
2020-02-04 23:31:17 +00:00

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// Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
#include "vm/object_store.h"
#include "vm/dart_entry.h"
#include "vm/exceptions.h"
#include "vm/isolate.h"
#include "vm/object.h"
#include "vm/raw_object.h"
#include "vm/resolver.h"
#include "vm/symbols.h"
#include "vm/visitor.h"
namespace dart {
ObjectStore::ObjectStore() {
#define INIT_FIELD(Type, name) name##_ = Type::null();
OBJECT_STORE_FIELD_LIST(INIT_FIELD, INIT_FIELD)
#undef INIT_FIELD
for (RawObject** current = from(); current <= to(); current++) {
ASSERT(*current == Object::null());
}
}
ObjectStore::~ObjectStore() {}
void ObjectStore::VisitObjectPointers(ObjectPointerVisitor* visitor) {
ASSERT(visitor != NULL);
visitor->set_gc_root_type("object store");
visitor->VisitPointers(from(), to());
visitor->clear_gc_root_type();
}
void ObjectStore::Init(Isolate* isolate) {
ASSERT(isolate->object_store() == NULL);
ObjectStore* store = new ObjectStore();
isolate->set_object_store(store);
}
#ifndef PRODUCT
void ObjectStore::PrintToJSONObject(JSONObject* jsobj) {
jsobj->AddProperty("type", "_ObjectStore");
{
JSONObject fields(jsobj, "fields");
Object& value = Object::Handle();
#define PRINT_OBJECT_STORE_FIELD(type, name) \
value = name##_; \
fields.AddProperty(#name "_", value);
OBJECT_STORE_FIELD_LIST(PRINT_OBJECT_STORE_FIELD, PRINT_OBJECT_STORE_FIELD);
#undef PRINT_OBJECT_STORE_FIELD
}
}
#endif // !PRODUCT
static RawInstance* AllocateObjectByClassName(const Library& library,
const String& class_name) {
const Class& cls = Class::Handle(library.LookupClassAllowPrivate(class_name));
ASSERT(!cls.IsNull());
return Instance::New(cls);
}
RawError* ObjectStore::PreallocateObjects() {
Thread* thread = Thread::Current();
Isolate* isolate = thread->isolate();
Zone* zone = thread->zone();
ASSERT(isolate != NULL && isolate->object_store() == this);
if (this->stack_overflow() != Instance::null()) {
ASSERT(this->out_of_memory() != Instance::null());
ASSERT(this->preallocated_stack_trace() != StackTrace::null());
return Error::null();
}
ASSERT(this->stack_overflow() == Instance::null());
ASSERT(this->out_of_memory() == Instance::null());
ASSERT(this->preallocated_stack_trace() == StackTrace::null());
this->closure_functions_ = GrowableObjectArray::New();
this->resume_capabilities_ = GrowableObjectArray::New();
this->exit_listeners_ = GrowableObjectArray::New();
this->error_listeners_ = GrowableObjectArray::New();
Object& result = Object::Handle();
const Library& library = Library::Handle(Library::CoreLibrary());
result = AllocateObjectByClassName(library, Symbols::StackOverflowError());
if (result.IsError()) {
return Error::Cast(result).raw();
}
set_stack_overflow(Instance::Cast(result));
result = AllocateObjectByClassName(library, Symbols::OutOfMemoryError());
if (result.IsError()) {
return Error::Cast(result).raw();
}
set_out_of_memory(Instance::Cast(result));
// Allocate pre-allocated unhandled exception object initialized with the
// pre-allocated OutOfMemoryError.
const UnhandledException& unhandled_exception =
UnhandledException::Handle(UnhandledException::New(
Instance::Cast(result), StackTrace::Handle(zone)));
set_preallocated_unhandled_exception(unhandled_exception);
const Array& code_array = Array::Handle(
zone, Array::New(StackTrace::kPreallocatedStackdepth, Heap::kOld));
const Array& pc_offset_array = Array::Handle(
zone, Array::New(StackTrace::kPreallocatedStackdepth, Heap::kOld));
const StackTrace& stack_trace =
StackTrace::Handle(zone, StackTrace::New(code_array, pc_offset_array));
// Expansion of inlined functions requires additional memory at run time,
// avoid it.
stack_trace.set_expand_inlined(false);
set_preallocated_stack_trace(stack_trace);
return Error::null();
}
RawFunction* ObjectStore::PrivateObjectLookup(const String& name) {
const Library& core_lib = Library::Handle(core_library());
const String& mangled = String::ZoneHandle(core_lib.PrivateName(name));
const Class& cls = Class::Handle(object_class());
const Function& result = Function::Handle(cls.LookupDynamicFunction(mangled));
ASSERT(!result.IsNull());
return result.raw();
}
void ObjectStore::InitKnownObjects() {
Thread* thread = Thread::Current();
Zone* zone = thread->zone();
Class& cls = Class::Handle(zone);
const Library& collection_lib = Library::Handle(zone, collection_library());
cls = collection_lib.LookupClassAllowPrivate(Symbols::_LinkedHashSet());
ASSERT(!cls.IsNull());
set_linked_hash_set_class(cls);
#ifdef DART_PRECOMPILED_RUNTIME
// The rest of these objects are only needed for code generation.
return;
#else
Isolate* isolate = thread->isolate();
ASSERT(isolate != NULL && isolate->object_store() == this);
const Library& async_lib = Library::Handle(zone, async_library());
ASSERT(!async_lib.IsNull());
cls = async_lib.LookupClass(Symbols::Future());
ASSERT(!cls.IsNull());
set_future_class(cls);
cls = async_lib.LookupClass(Symbols::Completer());
ASSERT(!cls.IsNull());
set_completer_class(cls);
String& function_name = String::Handle(zone);
Function& function = Function::Handle(zone);
function_name = async_lib.PrivateName(Symbols::SetAsyncThreadStackTrace());
ASSERT(!function_name.IsNull());
function = Resolver::ResolveStatic(async_lib, Object::null_string(),
function_name, 0, 1, Object::null_array());
ASSERT(!function.IsNull());
set_async_set_thread_stack_trace(function);
function_name = async_lib.PrivateName(Symbols::ClearAsyncThreadStackTrace());
ASSERT(!function_name.IsNull());
function = Resolver::ResolveStatic(async_lib, Object::null_string(),
function_name, 0, 0, Object::null_array());
ASSERT(!function.IsNull());
set_async_clear_thread_stack_trace(function);
function_name = async_lib.PrivateName(Symbols::AsyncStarMoveNextHelper());
ASSERT(!function_name.IsNull());
function = Resolver::ResolveStatic(async_lib, Object::null_string(),
function_name, 0, 1, Object::null_array());
ASSERT(!function.IsNull());
set_async_star_move_next_helper(function);
function_name = async_lib.PrivateName(Symbols::_CompleteOnAsyncReturn());
ASSERT(!function_name.IsNull());
function = Resolver::ResolveStatic(async_lib, Object::null_string(),
function_name, 0, 2, Object::null_array());
ASSERT(!function.IsNull());
set_complete_on_async_return(function);
if (FLAG_async_debugger) {
// Disable debugging and inlining the _CompleteOnAsyncReturn function.
function.set_is_debuggable(false);
function.set_is_inlinable(false);
}
cls =
async_lib.LookupClassAllowPrivate(Symbols::_AsyncStarStreamController());
ASSERT(!cls.IsNull());
set_async_star_stream_controller(cls);
if (FLAG_async_debugger) {
// Disable debugging and inlining of all functions on the
// _AsyncStarStreamController class.
const Array& functions = Array::Handle(zone, cls.functions());
for (intptr_t i = 0; i < functions.Length(); i++) {
function ^= functions.At(i);
if (function.IsNull()) {
break;
}
function.set_is_debuggable(false);
function.set_is_inlinable(false);
}
}
const Library& internal_lib = Library::Handle(zone, _internal_library());
cls = internal_lib.LookupClass(Symbols::Symbol());
set_symbol_class(cls);
const Library& core_lib = Library::Handle(zone, core_library());
cls = core_lib.LookupClassAllowPrivate(Symbols::_CompileTimeError());
ASSERT(!cls.IsNull());
set_compiletime_error_class(cls);
cls = core_lib.LookupClassAllowPrivate(Symbols::Pragma());
ASSERT(!cls.IsNull());
set_pragma_class(cls);
set_pragma_name(Field::Handle(zone, cls.LookupField(Symbols::name())));
set_pragma_options(Field::Handle(zone, cls.LookupField(Symbols::options())));
cls = core_lib.LookupClassAllowPrivate(Symbols::_GrowableList());
ASSERT(!cls.IsNull());
growable_list_factory_ =
cls.LookupFactoryAllowPrivate(Symbols::_GrowableListFactory());
ASSERT(growable_list_factory_ != Function::null());
// Cache the core private functions used for fast instance of checks.
simple_instance_of_function_ =
PrivateObjectLookup(Symbols::_simpleInstanceOf());
simple_instance_of_true_function_ =
PrivateObjectLookup(Symbols::_simpleInstanceOfTrue());
simple_instance_of_false_function_ =
PrivateObjectLookup(Symbols::_simpleInstanceOfFalse());
// Ensure AddSmiSmiCheckForFastSmiStubs run by the background compiler
// will not create new functions.
const Class& smi_class = Class::Handle(zone, this->smi_class());
function_name =
Function::CreateDynamicInvocationForwarderName(Symbols::Plus());
Resolver::ResolveDynamicAnyArgs(zone, smi_class, function_name);
function_name =
Function::CreateDynamicInvocationForwarderName(Symbols::Minus());
Resolver::ResolveDynamicAnyArgs(zone, smi_class, function_name);
function_name =
Function::CreateDynamicInvocationForwarderName(Symbols::Equals());
Resolver::ResolveDynamicAnyArgs(zone, smi_class, function_name);
function_name =
Function::CreateDynamicInvocationForwarderName(Symbols::LAngleBracket());
Resolver::ResolveDynamicAnyArgs(zone, smi_class, function_name);
function_name =
Function::CreateDynamicInvocationForwarderName(Symbols::RAngleBracket());
Resolver::ResolveDynamicAnyArgs(zone, smi_class, function_name);
function_name =
Function::CreateDynamicInvocationForwarderName(Symbols::BitAnd());
Resolver::ResolveDynamicAnyArgs(zone, smi_class, function_name);
function_name =
Function::CreateDynamicInvocationForwarderName(Symbols::BitOr());
Resolver::ResolveDynamicAnyArgs(zone, smi_class, function_name);
function_name =
Function::CreateDynamicInvocationForwarderName(Symbols::Star());
Resolver::ResolveDynamicAnyArgs(zone, smi_class, function_name);
#endif
}
} // namespace dart
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