VM: Re-format to use at most one newline between functions

runtime/vm/dart_entry.cc

 // Copyright (c) 2011, 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/dart_entry.h"
 
 #include "vm/class_finalizer.h"
 #include "vm/compiler.h"
 #include "vm/debugger.h"
 #include "vm/object_store.h"
 #include "vm/resolver.h"
 #include "vm/runtime_entry.h"
 #include "vm/safepoint.h"
 #include "vm/simulator.h"
 #include "vm/stub_code.h"
 #include "vm/symbols.h"
 
 namespace dart {
 
 // A cache of VM heap allocated arguments descriptors.
 RawArray* ArgumentsDescriptor::cached_args_descriptors_[kCachedDescriptorCount];
 
-
 RawObject* DartEntry::InvokeFunction(const Function& function,
                                      const Array& arguments) {
   ASSERT(Thread::Current()->IsMutatorThread());
   const int kTypeArgsLen = 0;  // No support to pass type args to generic func.
   const Array& arguments_descriptor =
       Array::Handle(ArgumentsDescriptor::New(kTypeArgsLen, arguments.Length()));
   return InvokeFunction(function, arguments, arguments_descriptor);
 }
 
-
 class ScopedIsolateStackLimits : public ValueObject {
  public:
   explicit ScopedIsolateStackLimits(Thread* thread, uword current_sp)
       : thread_(thread), saved_stack_limit_(0) {
     ASSERT(thread != NULL);
     // Set the thread's stack_base based on the current
     // stack pointer, we keep refining this value as we
     // see higher stack pointers (Note: we assume the stack
     // grows from high to low addresses).
     OSThread* os_thread = thread->os_thread();
@@ skipping 14 matching lines @@
     // to a stack limit of 0 when all nested invocations are done and
     // we have bottomed out.
     thread_->SetStackLimit(saved_stack_limit_);
   }
 
  private:
   Thread* thread_;
   uword saved_stack_limit_;
 };
 
-
 // Clears/restores Thread::long_jump_base on construction/destruction.
 // Ensures that we do not attempt to long jump across Dart frames.
 class SuspendLongJumpScope : public StackResource {
  public:
   explicit SuspendLongJumpScope(Thread* thread)
       : StackResource(thread), saved_long_jump_base_(thread->long_jump_base()) {
     thread->set_long_jump_base(NULL);
   }
 
   ~SuspendLongJumpScope() {
     ASSERT(thread()->long_jump_base() == NULL);
     thread()->set_long_jump_base(saved_long_jump_base_);
   }
 
  private:
   LongJumpScope* saved_long_jump_base_;
 };
 
-
 RawObject* DartEntry::InvokeFunction(const Function& function,
                                      const Array& arguments,
                                      const Array& arguments_descriptor,
                                      uword current_sp) {
   // Get the entrypoint corresponding to the function specified, this
   // will result in a compilation of the function if it is not already
   // compiled.
   Thread* thread = Thread::Current();
   Zone* zone = thread->zone();
   ASSERT(thread->IsMutatorThread());
@@ skipping 27 matching lines @@
   return bit_copy<RawObject*, int64_t>(Simulator::Current()->Call(
       reinterpret_cast<intptr_t>(entrypoint), reinterpret_cast<intptr_t>(&code),
       reinterpret_cast<intptr_t>(&arguments_descriptor),
       reinterpret_cast<intptr_t>(&arguments),
       reinterpret_cast<intptr_t>(thread)));
 #else
   return entrypoint(code, arguments_descriptor, arguments, thread);
 #endif
 }
 
-
 RawObject* DartEntry::InvokeClosure(const Array& arguments) {
   const int kTypeArgsLen = 0;  // No support to pass type args to generic func.
   const Array& arguments_descriptor =
       Array::Handle(ArgumentsDescriptor::New(kTypeArgsLen, arguments.Length()));
   return InvokeClosure(arguments, arguments_descriptor);
 }
 
-
 RawObject* DartEntry::InvokeClosure(const Array& arguments,
                                     const Array& arguments_descriptor) {
   Thread* thread = Thread::Current();
   Zone* zone = thread->zone();
   const ArgumentsDescriptor args_desc(arguments_descriptor);
   const intptr_t instance_index = args_desc.TypeArgsLen() == 0 ? 0 : 1;
   Instance& instance = Instance::Handle(zone);
   instance ^= arguments.At(instance_index);
   // Get the entrypoint corresponding to the closure function or to the call
   // method of the instance. This will result in a compilation of the function
@@ skipping 54 matching lines @@
       }
       cls = cls.SuperClass();
     }
   }
 
   // No compatible method or getter so invoke noSuchMethod.
   return InvokeNoSuchMethod(instance, Symbols::Call(), arguments,
                             arguments_descriptor);
 }
 
-
 RawObject* DartEntry::InvokeNoSuchMethod(const Instance& receiver,
                                          const String& target_name,
                                          const Array& arguments,
                                          const Array& arguments_descriptor) {
   ASSERT(receiver.raw() == arguments.At(0));
   // Allocate an Invocation object.
   const Library& core_lib = Library::Handle(Library::CoreLibrary());
 
   Class& invocation_mirror_class = Class::Handle(core_lib.LookupClass(
       String::Handle(core_lib.PrivateName(Symbols::InvocationMirror()))));
@@ skipping 32 matching lines @@
                       thread->isolate()->object_store()->object_class()),
         Symbols::NoSuchMethod(), args_desc);
   }
   ASSERT(!function.IsNull());
   const Array& args = Array::Handle(Array::New(kNumArguments));
   args.SetAt(0, receiver);
   args.SetAt(1, invocation_mirror);
   return InvokeFunction(function, args);
 }
 
-
 ArgumentsDescriptor::ArgumentsDescriptor(const Array& array) : array_(array) {}
 
 intptr_t ArgumentsDescriptor::TypeArgsLen() const {
   return Smi::Cast(Object::Handle(array_.At(kTypeArgsLenIndex))).Value();
 }
 
-
 intptr_t ArgumentsDescriptor::Count() const {
   return Smi::Cast(Object::Handle(array_.At(kCountIndex))).Value();
 }
 
-
 intptr_t ArgumentsDescriptor::PositionalCount() const {
   return Smi::Cast(Object::Handle(array_.At(kPositionalCountIndex))).Value();
 }
 
-
 RawString* ArgumentsDescriptor::NameAt(intptr_t index) const {
   const intptr_t offset =
       kFirstNamedEntryIndex + (index * kNamedEntrySize) + kNameOffset;
   String& result = String::Handle();
   result ^= array_.At(offset);
   return result.raw();
 }
 
-
 intptr_t ArgumentsDescriptor::PositionAt(intptr_t index) const {
   const intptr_t offset =
       kFirstNamedEntryIndex + (index * kNamedEntrySize) + kPositionOffset;
   return Smi::Value(Smi::RawCast(array_.At(offset)));
 }
 
-
 bool ArgumentsDescriptor::MatchesNameAt(intptr_t index,
                                         const String& other) const {
   return NameAt(index) == other.raw();
 }
 
-
 intptr_t ArgumentsDescriptor::type_args_len_offset() {
   return Array::element_offset(kTypeArgsLenIndex);
 }
 
-
 intptr_t ArgumentsDescriptor::count_offset() {
   return Array::element_offset(kCountIndex);
 }
 
-
 intptr_t ArgumentsDescriptor::positional_count_offset() {
   return Array::element_offset(kPositionalCountIndex);
 }
 
-
 intptr_t ArgumentsDescriptor::first_named_entry_offset() {
   return Array::element_offset(kFirstNamedEntryIndex);
 }
 
-
 RawArray* ArgumentsDescriptor::New(intptr_t type_args_len,
                                    intptr_t num_arguments,
                                    const Array& optional_arguments_names) {
   const intptr_t num_named_args =
       optional_arguments_names.IsNull() ? 0 : optional_arguments_names.Length();
   if (num_named_args == 0) {
     return ArgumentsDescriptor::New(type_args_len, num_arguments);
   }
   ASSERT(type_args_len >= 0);
   ASSERT(num_arguments >= 0);
@@ skipping 44 matching lines @@
   // Set terminating null.
   descriptor.SetAt(descriptor_len - 1, Object::null_object());
 
   // Share the immutable descriptor when possible by canonicalizing it.
   descriptor.MakeImmutable();
   descriptor ^= descriptor.CheckAndCanonicalize(thread, NULL);
   ASSERT(!descriptor.IsNull());
   return descriptor.raw();
 }
 
-
 RawArray* ArgumentsDescriptor::New(intptr_t type_args_len,
                                    intptr_t num_arguments) {
   ASSERT(type_args_len >= 0);
   ASSERT(num_arguments >= 0);
   if ((type_args_len == 0) && (num_arguments < kCachedDescriptorCount)) {
     return cached_args_descriptors_[num_arguments];
   }
   return NewNonCached(type_args_len, num_arguments);
 }
 
-
 RawArray* ArgumentsDescriptor::NewNonCached(intptr_t type_args_len,
                                             intptr_t num_arguments,
                                             bool canonicalize) {
   // Build the arguments descriptor array, which consists of the length of the
   // type argument vector, total argument count; the positional argument count;
   // and a terminating null to simplify iterating in generated code.
   Thread* thread = Thread::Current();
   Zone* zone = thread->zone();
   const intptr_t descriptor_len = LengthFor(0);
   Array& descriptor =
@@ skipping 15 matching lines @@
 
   // Share the immutable descriptor when possible by canonicalizing it.
   descriptor.MakeImmutable();
   if (canonicalize) {
     descriptor ^= descriptor.CheckAndCanonicalize(thread, NULL);
   }
   ASSERT(!descriptor.IsNull());
   return descriptor.raw();
 }
 
-
 void ArgumentsDescriptor::InitOnce() {
   for (int i = 0; i < kCachedDescriptorCount; i++) {
     cached_args_descriptors_[i] =
         ArgumentsDescriptor::NewNonCached(/*type_args_len=*/0, i, false);
   }
 }
 
-
 RawObject* DartLibraryCalls::InstanceCreate(const Library& lib,
                                             const String& class_name,
                                             const String& constructor_name,
                                             const Array& arguments) {
   const Class& cls = Class::Handle(lib.LookupClassAllowPrivate(class_name));
   ASSERT(!cls.IsNull());
   // For now, we only support a non-parameterized or raw type.
   const int kNumExtraArgs = 1;  // implicit rcvr arg.
   const Instance& exception_object = Instance::Handle(Instance::New(cls));
   const Array& constructor_arguments =
@@ skipping 12 matching lines @@
   ASSERT(!constructor.IsNull());
   const Object& retval = Object::Handle(
       DartEntry::InvokeFunction(constructor, constructor_arguments));
   ASSERT(retval.IsNull() || retval.IsError());
   if (retval.IsError()) {
     return retval.raw();
   }
   return exception_object.raw();
 }
 
-
 RawObject* DartLibraryCalls::ToString(const Instance& receiver) {
   const int kTypeArgsLen = 0;
   const int kNumArguments = 1;  // Receiver.
   ArgumentsDescriptor args_desc(
       Array::Handle(ArgumentsDescriptor::New(kTypeArgsLen, kNumArguments)));
   const Function& function = Function::Handle(
       Resolver::ResolveDynamic(receiver, Symbols::toString(), args_desc));
   ASSERT(!function.IsNull());
   const Array& args = Array::Handle(Array::New(kNumArguments));
   args.SetAt(0, receiver);
   const Object& result =
       Object::Handle(DartEntry::InvokeFunction(function, args));
   ASSERT(result.IsInstance() || result.IsError());
   return result.raw();
 }
 
-
 RawObject* DartLibraryCalls::HashCode(const Instance& receiver) {
   const int kTypeArgsLen = 0;
   const int kNumArguments = 1;  // Receiver.
   ArgumentsDescriptor args_desc(
       Array::Handle(ArgumentsDescriptor::New(kTypeArgsLen, kNumArguments)));
   const Function& function = Function::Handle(
       Resolver::ResolveDynamic(receiver, Symbols::hashCode(), args_desc));
   ASSERT(!function.IsNull());
   const Array& args = Array::Handle(Array::New(kNumArguments));
   args.SetAt(0, receiver);
   const Object& result =
       Object::Handle(DartEntry::InvokeFunction(function, args));
   ASSERT(result.IsInstance() || result.IsError());
   return result.raw();
 }
 
-
 RawObject* DartLibraryCalls::Equals(const Instance& left,
                                     const Instance& right) {
   const int kTypeArgsLen = 0;
   const int kNumArguments = 2;
   ArgumentsDescriptor args_desc(
       Array::Handle(ArgumentsDescriptor::New(kTypeArgsLen, kNumArguments)));
   const Function& function = Function::Handle(
       Resolver::ResolveDynamic(left, Symbols::EqualOperator(), args_desc));
   ASSERT(!function.IsNull());
 
   const Array& args = Array::Handle(Array::New(kNumArguments));
   args.SetAt(0, left);
   args.SetAt(1, right);
   const Object& result =
       Object::Handle(DartEntry::InvokeFunction(function, args));
   ASSERT(result.IsInstance() || result.IsError());
   return result.raw();
 }
 
-
 RawObject* DartLibraryCalls::LookupHandler(Dart_Port port_id) {
   Thread* thread = Thread::Current();
   Zone* zone = thread->zone();
   Function& function = Function::Handle(
       zone, thread->isolate()->object_store()->lookup_port_handler());
   const int kTypeArgsLen = 0;
   const int kNumArguments = 1;
   if (function.IsNull()) {
     Library& isolate_lib = Library::Handle(zone, Library::IsolateLibrary());
     ASSERT(!isolate_lib.IsNull());
     const String& class_name = String::Handle(
         zone, isolate_lib.PrivateName(Symbols::_RawReceivePortImpl()));
     const String& function_name = String::Handle(
         zone, isolate_lib.PrivateName(Symbols::_lookupHandler()));
     function = Resolver::ResolveStatic(isolate_lib, class_name, function_name,
                                        kTypeArgsLen, kNumArguments,
                                        Object::empty_array());
     ASSERT(!function.IsNull());
     thread->isolate()->object_store()->set_lookup_port_handler(function);
   }
   const Array& args = Array::Handle(zone, Array::New(kNumArguments));
   args.SetAt(0, Integer::Handle(zone, Integer::New(port_id)));
   const Object& result =
       Object::Handle(zone, DartEntry::InvokeFunction(function, args));
   return result.raw();
 }
 
-
 RawObject* DartLibraryCalls::HandleMessage(const Object& handler,
                                            const Instance& message) {
   Thread* thread = Thread::Current();
   Zone* zone = thread->zone();
   Isolate* isolate = thread->isolate();
   Function& function = Function::Handle(
       zone, isolate->object_store()->handle_message_function());
   const int kTypeArgsLen = 0;
   const int kNumArguments = 2;
   if (function.IsNull()) {
@@ skipping 17 matching lines @@
     // through code, enable single stepping so debugger will stop
     // at the first location the user is interested in.
     isolate->debugger()->SetResumeAction(Debugger::kStepInto);
   }
   const Object& result =
       Object::Handle(zone, DartEntry::InvokeFunction(function, args));
   ASSERT(result.IsNull() || result.IsError());
   return result.raw();
 }
 
-
 RawObject* DartLibraryCalls::DrainMicrotaskQueue() {
   Zone* zone = Thread::Current()->zone();
   Library& isolate_lib = Library::Handle(zone, Library::IsolateLibrary());
   ASSERT(!isolate_lib.IsNull());
   Function& function =
       Function::Handle(zone, isolate_lib.LookupFunctionAllowPrivate(
                                  Symbols::_runPendingImmediateCallback()));
   const Object& result = Object::Handle(
       zone, DartEntry::InvokeFunction(function, Object::empty_array()));
   ASSERT(result.IsNull() || result.IsError());
   return result.raw();
 }
 
-
 RawObject* DartLibraryCalls::MapSetAt(const Instance& map,
                                       const Instance& key,
                                       const Instance& value) {
   const int kTypeArgsLen = 0;
   const int kNumArguments = 3;
   ArgumentsDescriptor args_desc(
       Array::Handle(ArgumentsDescriptor::New(kTypeArgsLen, kNumArguments)));
   const Function& function = Function::Handle(
       Resolver::ResolveDynamic(map, Symbols::AssignIndexToken(), args_desc));
   ASSERT(!function.IsNull());
   const Array& args = Array::Handle(Array::New(kNumArguments));
   args.SetAt(0, map);
   args.SetAt(1, key);
   args.SetAt(2, value);
   const Object& result =
       Object::Handle(DartEntry::InvokeFunction(function, args));
   return result.raw();
 }
 
 }  // namespace dart