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

runtime/vm/assembler.cc

 // Copyright (c) 2012, 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/assembler.h"
 
 #include "platform/utils.h"
 #include "vm/cpu.h"
 #include "vm/heap.h"
 #include "vm/memory_region.h"
@@ skipping 19 matching lines @@
   Zone* zone = Thread::Current()->zone();
   uword result = zone->AllocUnsafe(capacity);
 #if defined(DEBUG)
   // Initialize the buffer with kBreakPointInstruction to force a break
   // point if we ever execute an uninitialized part of the code buffer.
   Assembler::InitializeMemoryWithBreakpoints(result, capacity);
 #endif
   return result;
 }
 
-
 #if defined(DEBUG)
 AssemblerBuffer::EnsureCapacity::EnsureCapacity(AssemblerBuffer* buffer) {
   if (buffer->cursor() >= buffer->limit()) buffer->ExtendCapacity();
   // In debug mode, we save the assembler buffer along with the gap
   // size before we start emitting to the buffer. This allows us to
   // check that any single generated instruction doesn't overflow the
   // limit implied by the minimum gap size.
   buffer_ = buffer;
   gap_ = ComputeGap();
   // Make sure that extending the capacity leaves a big enough gap
   // for any kind of instruction.
   ASSERT(gap_ >= kMinimumGap);
   // Mark the buffer as having ensured the capacity.
   ASSERT(!buffer->HasEnsuredCapacity());  // Cannot nest.
   buffer->has_ensured_capacity_ = true;
 }
 
-
 AssemblerBuffer::EnsureCapacity::~EnsureCapacity() {
   // Unmark the buffer, so we cannot emit after this.
   buffer_->has_ensured_capacity_ = false;
   // Make sure the generated instruction doesn't take up more
   // space than the minimum gap.
   intptr_t delta = gap_ - ComputeGap();
   ASSERT(delta <= kMinimumGap);
 }
 #endif
 
-
 AssemblerBuffer::AssemblerBuffer()
     : pointer_offsets_(new ZoneGrowableArray<intptr_t>(16)) {
   static const intptr_t kInitialBufferCapacity = 4 * KB;
   contents_ = NewContents(kInitialBufferCapacity);
   cursor_ = contents_;
   limit_ = ComputeLimit(contents_, kInitialBufferCapacity);
   fixup_ = NULL;
 #if defined(DEBUG)
   has_ensured_capacity_ = false;
   fixups_processed_ = false;
 #endif
 
   // Verify internal state.
   ASSERT(Capacity() == kInitialBufferCapacity);
   ASSERT(Size() == 0);
 }
 
-
 AssemblerBuffer::~AssemblerBuffer() {}
 
-
 void AssemblerBuffer::ProcessFixups(const MemoryRegion& region) {
   AssemblerFixup* fixup = fixup_;
   while (fixup != NULL) {
     fixup->Process(region, fixup->position());
     fixup = fixup->previous();
   }
 }
 
-
 void AssemblerBuffer::FinalizeInstructions(const MemoryRegion& instructions) {
   // Copy the instructions from the buffer.
   MemoryRegion from(reinterpret_cast<void*>(contents()), Size());
   instructions.CopyFrom(0, from);
 
   // Process fixups in the instructions.
   ProcessFixups(instructions);
 #if defined(DEBUG)
   fixups_processed_ = true;
 #endif
 }
 
-
 void AssemblerBuffer::ExtendCapacity() {
   intptr_t old_size = Size();
   intptr_t old_capacity = Capacity();
   intptr_t new_capacity =
       Utils::Minimum(old_capacity * 2, old_capacity + 1 * MB);
   if (new_capacity < old_capacity) {
     FATAL("Unexpected overflow in AssemblerBuffer::ExtendCapacity");
   }
 
   // Allocate the new data area and copy contents of the old one to it.
   uword new_contents = NewContents(new_capacity);
   memmove(reinterpret_cast<void*>(new_contents),
           reinterpret_cast<void*>(contents_), old_size);
 
   // Compute the relocation delta and switch to the new contents area.
   intptr_t delta = new_contents - contents_;
   contents_ = new_contents;
 
   // Update the cursor and recompute the limit.
   cursor_ += delta;
   limit_ = ComputeLimit(new_contents, new_capacity);
 
   // Verify internal state.
   ASSERT(Capacity() == new_capacity);
   ASSERT(Size() == old_size);
 }
 
-
 class PatchCodeWithHandle : public AssemblerFixup {
  public:
   PatchCodeWithHandle(ZoneGrowableArray<intptr_t>* pointer_offsets,
                       const Object& object)
       : pointer_offsets_(pointer_offsets), object_(object) {}
 
   void Process(const MemoryRegion& region, intptr_t position) {
     // Patch the handle into the code. Once the instructions are installed into
     // a raw code object and the pointer offsets are setup, the handle is
     // resolved.
     region.Store<const Object*>(position, &object_);
     pointer_offsets_->Add(position);
   }
 
   virtual bool IsPointerOffset() const { return true; }
 
  private:
   ZoneGrowableArray<intptr_t>* pointer_offsets_;
   const Object& object_;
 };
 
-
 intptr_t AssemblerBuffer::CountPointerOffsets() const {
   intptr_t count = 0;
   AssemblerFixup* current = fixup_;
   while (current != NULL) {
     if (current->IsPointerOffset()) ++count;
     current = current->previous_;
   }
   return count;
 }
 
-
 void AssemblerBuffer::EmitObject(const Object& object) {
   // Since we are going to store the handle as part of the fixup information
   // the handle needs to be a zone handle.
   ASSERT(object.IsNotTemporaryScopedHandle());
   ASSERT(object.IsOld());
   EmitFixup(new PatchCodeWithHandle(pointer_offsets_, object));
   cursor_ += kWordSize;  // Reserve space for pointer.
 }
 
-
 // Shared macros are implemented here.
 void Assembler::Unimplemented(const char* message) {
   const char* format = "Unimplemented: %s";
   const intptr_t len = OS::SNPrint(NULL, 0, format, message);
   char* buffer = reinterpret_cast<char*>(malloc(len + 1));
   OS::SNPrint(buffer, len + 1, format, message);
   Stop(buffer);
 }
 
-
 void Assembler::Untested(const char* message) {
   const char* format = "Untested: %s";
   const intptr_t len = OS::SNPrint(NULL, 0, format, message);
   char* buffer = reinterpret_cast<char*>(malloc(len + 1));
   OS::SNPrint(buffer, len + 1, format, message);
   Stop(buffer);
 }
 
-
 void Assembler::Unreachable(const char* message) {
   const char* format = "Unreachable: %s";
   const intptr_t len = OS::SNPrint(NULL, 0, format, message);
   char* buffer = reinterpret_cast<char*>(malloc(len + 1));
   OS::SNPrint(buffer, len + 1, format, message);
   Stop(buffer);
 }
 
-
 void Assembler::Comment(const char* format, ...) {
   if (EmittingComments()) {
     char buffer[1024];
 
     va_list args;
     va_start(args, format);
     OS::VSNPrint(buffer, sizeof(buffer), format, args);
     va_end(args);
 
     comments_.Add(
         new CodeComment(buffer_.GetPosition(),
                         String::ZoneHandle(String::New(buffer, Heap::kOld))));
   }
 }
 
-
 bool Assembler::EmittingComments() {
   return FLAG_code_comments || FLAG_disassemble || FLAG_disassemble_optimized;
 }
 
-
 const Code::Comments& Assembler::GetCodeComments() const {
   Code::Comments& comments = Code::Comments::New(comments_.length());
 
   for (intptr_t i = 0; i < comments_.length(); i++) {
     comments.SetPCOffsetAt(i, comments_[i]->pc_offset());
     comments.SetCommentAt(i, comments_[i]->comment());
   }
 
   return comments;
 }
 
-
 intptr_t ObjectPoolWrapper::AddObject(const Object& obj,
                                       Patchability patchable) {
   ASSERT(obj.IsNotTemporaryScopedHandle());
   return AddObject(ObjectPoolWrapperEntry(&obj), patchable);
 }
 
-
 intptr_t ObjectPoolWrapper::AddImmediate(uword imm) {
   return AddObject(ObjectPoolWrapperEntry(imm, ObjectPool::kImmediate),
                    kNotPatchable);
 }
 
 intptr_t ObjectPoolWrapper::AddObject(ObjectPoolWrapperEntry entry,
                                       Patchability patchable) {
   ASSERT((entry.type_ != ObjectPool::kTaggedObject) ||
          (entry.obj_->IsNotTemporaryScopedHandle() &&
           (entry.equivalence_ == NULL ||
            entry.equivalence_->IsNotTemporaryScopedHandle())));
   object_pool_.Add(entry);
   if (patchable == kNotPatchable) {
     // The object isn't patchable. Record the index for fast lookup.
     object_pool_index_table_.Insert(
         ObjIndexPair(entry, object_pool_.length() - 1));
   }
   return object_pool_.length() - 1;
 }
 
-
 intptr_t ObjectPoolWrapper::FindObject(ObjectPoolWrapperEntry entry,
                                        Patchability patchable) {
   // If the object is not patchable, check if we've already got it in the
   // object pool.
   if (patchable == kNotPatchable) {
     intptr_t idx = object_pool_index_table_.LookupValue(entry);
     if (idx != ObjIndexPair::kNoIndex) {
       return idx;
     }
   }
   return AddObject(entry, patchable);
 }
 
-
 intptr_t ObjectPoolWrapper::FindObject(const Object& obj,
                                        Patchability patchable) {
   return FindObject(ObjectPoolWrapperEntry(&obj), patchable);
 }
 
-
 intptr_t ObjectPoolWrapper::FindObject(const Object& obj,
                                        const Object& equivalence) {
   return FindObject(ObjectPoolWrapperEntry(&obj, &equivalence), kNotPatchable);
 }
 
-
 intptr_t ObjectPoolWrapper::FindImmediate(uword imm) {
   return FindObject(ObjectPoolWrapperEntry(imm, ObjectPool::kImmediate),
                     kNotPatchable);
 }
 
-
 intptr_t ObjectPoolWrapper::FindNativeEntry(const ExternalLabel* label,
                                             Patchability patchable) {
   return FindObject(
       ObjectPoolWrapperEntry(label->address(), ObjectPool::kNativeEntry),
       patchable);
 }
 
-
 RawObjectPool* ObjectPoolWrapper::MakeObjectPool() {
   intptr_t len = object_pool_.length();
   if (len == 0) {
     return Object::empty_object_pool().raw();
   }
   const ObjectPool& result = ObjectPool::Handle(ObjectPool::New(len));
   ObjectPoolInfo pool_info(result);
   for (intptr_t i = 0; i < len; ++i) {
     ObjectPool::EntryType info = object_pool_[i].type_;
     pool_info.SetInfoAt(i, info);
     if (info == ObjectPool::kTaggedObject) {
       result.SetObjectAt(i, *object_pool_[i].obj_);
     } else {
       result.SetRawValueAt(i, object_pool_[i].raw_value_);
     }
   }
   return result.raw();
 }
 
-
 }  // namespace dart