dexlayout/dex_visualize.cc - platform/art - Gitiles

 /*
  * Copyright (C) 2016 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  *
  * Implementation file of the dex layout visualization.
  *
  * This is a tool to read dex files into an internal representation,
  * reorganize the representation, and emit dex files with a better
  * file layout.
  */

 #include "dex_visualize.h"

 #include <inttypes.h>
 #include <stdio.h>

 #include <functional>
 #include <memory>
 #include <vector>

 #include "dex_ir.h"
 #include "dexlayout.h"
 #include "jit/offline_profiling_info.h"

 namespace art {

 struct FileSection {
  public:
   std::string name_;
   uint16_t type_;
   std::function<uint32_t(const dex_ir::Collections&)> size_fn_;
   std::function<uint32_t(const dex_ir::Collections&)> offset_fn_;
 };

 static const std::vector<FileSection> kFileSections = {
   {
     "StringId",
     DexFile::kDexTypeStringIdItem,
     &dex_ir::Collections::StringIdsSize,
     &dex_ir::Collections::StringIdsOffset
   }, {
     "TypeId",
     DexFile::kDexTypeTypeIdItem,
     &dex_ir::Collections::TypeIdsSize,
     &dex_ir::Collections::TypeIdsOffset
   }, {
     "ProtoId",
     DexFile::kDexTypeProtoIdItem,
     &dex_ir::Collections::ProtoIdsSize,
     &dex_ir::Collections::ProtoIdsOffset
   }, {
     "FieldId",
     DexFile::kDexTypeFieldIdItem,
     &dex_ir::Collections::FieldIdsSize,
     &dex_ir::Collections::FieldIdsOffset
   }, {
     "MethodId",
     DexFile::kDexTypeMethodIdItem,
     &dex_ir::Collections::MethodIdsSize,
     &dex_ir::Collections::MethodIdsOffset
   }, {
     "ClassDef",
     DexFile::kDexTypeClassDefItem,
     &dex_ir::Collections::ClassDefsSize,
     &dex_ir::Collections::ClassDefsOffset
   }, {
     "StringData",
     DexFile::kDexTypeStringDataItem,
     &dex_ir::Collections::StringDatasSize,
     &dex_ir::Collections::StringDatasOffset
   }, {
     "TypeList",
     DexFile::kDexTypeTypeList,
     &dex_ir::Collections::TypeListsSize,
     &dex_ir::Collections::TypeListsOffset
   }, {
     "EncArr",
     DexFile::kDexTypeEncodedArrayItem,
     &dex_ir::Collections::EncodedArraySize,
     &dex_ir::Collections::EncodedArrayOffset
   }, {
     "Annotation",
     DexFile::kDexTypeAnnotationItem,
     &dex_ir::Collections::AnnotationSize,
     &dex_ir::Collections::AnnotationOffset
   }, {
     "AnnoSet",
     DexFile::kDexTypeAnnotationSetItem,
     &dex_ir::Collections::AnnotationSetSize,
     &dex_ir::Collections::AnnotationSetOffset
   }, {
     "AnnoSetRL",
     DexFile::kDexTypeAnnotationSetRefList,
     &dex_ir::Collections::AnnotationSetRefListsSize,
     &dex_ir::Collections::AnnotationSetRefListsOffset
   }, {
     "AnnoDir",
     DexFile::kDexTypeAnnotationsDirectoryItem,
     &dex_ir::Collections::AnnotationsDirectorySize,
     &dex_ir::Collections::AnnotationsDirectoryOffset
   }, {
     "DebugInfo",
     DexFile::kDexTypeDebugInfoItem,
     &dex_ir::Collections::DebugInfoSize,
     &dex_ir::Collections::DebugInfoOffset
   }, {
     "CodeItem",
     DexFile::kDexTypeCodeItem,
     &dex_ir::Collections::CodeItemsSize,
     &dex_ir::Collections::CodeItemsOffset
   }, {
     "ClassData",
     DexFile::kDexTypeClassDataItem,
     &dex_ir::Collections::ClassDatasSize,
     &dex_ir::Collections::ClassDatasOffset
   }
 };

 class Dumper {
  public:
   // Colors are based on the type of the section in MapList.
   Dumper(const dex_ir::Collections& collections, size_t dex_file_index) {
     // Build the table that will map from offset to color
     table_.emplace_back(DexFile::kDexTypeHeaderItem, 0u);
     for (const FileSection& s : kFileSections) {
       table_.emplace_back(s.type_, s.offset_fn_(collections));
     }
     // Sort into descending order by offset.
     std::sort(table_.begin(),
               table_.end(),
               [](const SectionColor& a, const SectionColor& b) { return a.offset_ > b.offset_; });
     // Open the file and emit the gnuplot prologue.
     std::string dex_file_name("classes");
     std::string out_file_base_name("layout");
     if (dex_file_index > 0) {
       out_file_base_name += std::to_string(dex_file_index + 1);
       dex_file_name += std::to_string(dex_file_index + 1);
     }
     dex_file_name += ".dex";
     std::string out_file_name(out_file_base_name + ".gnuplot");
     std::string png_file_name(out_file_base_name + ".png");
     out_file_ = fopen(out_file_name.c_str(), "w");
     fprintf(out_file_, "set terminal png size 1920,1080\n");
     fprintf(out_file_, "set output \"%s\"\n", png_file_name.c_str());
     fprintf(out_file_, "set title \"%s\"\n", dex_file_name.c_str());
     fprintf(out_file_, "set xlabel \"Page offset into dex\"\n");
     fprintf(out_file_, "set ylabel \"ClassDef index\"\n");
     fprintf(out_file_, "set xtics rotate out (");
     fprintf(out_file_, "\"Header\" %d, ", 0);
     bool printed_one = false;
     for (const FileSection& s : kFileSections) {
       if (s.size_fn_(collections) > 0) {
         if (printed_one) {
           fprintf(out_file_, ", ");
         }
         fprintf(out_file_, "\"%s\" %d", s.name_.c_str(), s.offset_fn_(collections) / kPageSize);
         printed_one = true;
       }
     }
     fprintf(out_file_, ")\n");
     fprintf(out_file_,
             "plot \"-\" using 1:2:3:4:5 with vector nohead linewidth 1 lc variable notitle\n");
   }

   int GetColor(uint32_t offset) const {
     // The dread linear search to find the right section for the reference.
     uint16_t section = 0;
     for (uint16_t i = 0; i < table_.size(); ++i) {
       if (table_[i].offset_ < offset) {
         section = table_[i].type_;
         break;
       }
     }
     // And a lookup table from type to color.
     ColorMapType::const_iterator iter = kColorMap.find(section);
     if (iter != kColorMap.end()) {
       return iter->second;
     }
     return 0;
   }

   void DumpAddressRange(uint32_t from, uint32_t size, int class_index) {
     const uint32_t low_page = from / kPageSize;
     const uint32_t high_page = (size > 0) ? (from + size - 1) / kPageSize : low_page;
     const uint32_t size_delta = high_page - low_page;
     fprintf(out_file_, "%d %d %d 0 %d\n", low_page, class_index, size_delta, GetColor(from));
   }

   void DumpAddressRange(const dex_ir::Item* item, int class_index) {
     if (item != nullptr) {
       DumpAddressRange(item->GetOffset(), item->GetSize(), class_index);
     }
   }

   void DumpStringData(const dex_ir::StringData* string_data, int class_index) {
     DumpAddressRange(string_data, class_index);
   }

   void DumpStringId(const dex_ir::StringId* string_id, int class_index) {
     DumpAddressRange(string_id, class_index);
     if (string_id == nullptr) {
       return;
     }
     DumpStringData(string_id->DataItem(), class_index);
   }

   void DumpTypeId(const dex_ir::TypeId* type_id, int class_index) {
     DumpAddressRange(type_id, class_index);
     DumpStringId(type_id->GetStringId(), class_index);
   }

   void DumpFieldId(const dex_ir::FieldId* field_id, int class_index) {
     DumpAddressRange(field_id, class_index);
     if (field_id == nullptr) {
       return;
     }
     DumpTypeId(field_id->Class(), class_index);
     DumpTypeId(field_id->Type(), class_index);
     DumpStringId(field_id->Name(), class_index);
   }

   void DumpFieldItem(const dex_ir::FieldItem* field, int class_index) {
     DumpAddressRange(field, class_index);
     if (field == nullptr) {
       return;
     }
     DumpFieldId(field->GetFieldId(), class_index);
   }

   void DumpProtoId(const dex_ir::ProtoId* proto_id, int class_index) {
     DumpAddressRange(proto_id, class_index);
     if (proto_id == nullptr) {
       return;
     }
     DumpStringId(proto_id->Shorty(), class_index);
     const dex_ir::TypeIdVector& parameters = proto_id->Parameters();
     for (const dex_ir::TypeId* t : parameters) {
       DumpTypeId(t, class_index);
     }
     DumpTypeId(proto_id->ReturnType(), class_index);
   }

   void DumpMethodId(const dex_ir::MethodId* method_id, int class_index) {
     DumpAddressRange(method_id, class_index);
     if (method_id == nullptr) {
       return;
     }
     DumpTypeId(method_id->Class(), class_index);
     DumpProtoId(method_id->Proto(), class_index);
     DumpStringId(method_id->Name(), class_index);
   }

   void DumpMethodItem(const dex_ir::MethodItem* method, const DexFile* dex_file, int class_index) {
     if (profile_info_ != nullptr) {
       uint32_t method_idx = method->GetMethodId()->GetIndex();
       MethodReference mr(dex_file, method_idx);
       if (!profile_info_->ContainsMethod(mr)) {
         return;
       }
     }
     DumpAddressRange(method, class_index);
     if (method == nullptr) {
       return;
     }
     DumpMethodId(method->GetMethodId(), class_index);
     const dex_ir::CodeItem* code_item = method->GetCodeItem();
     if (code_item != nullptr) {
       DumpAddressRange(code_item, class_index);
     }
   }

   ~Dumper() {
     fclose(out_file_);
   }

  private:
   struct SectionColor {
    public:
     SectionColor(uint16_t type, uint32_t offset) : type_(type), offset_(offset) { }
     uint16_t type_;
     uint32_t offset_;
   };

   using ColorMapType = std::map<uint16_t, int>;
   const ColorMapType kColorMap = {
     { DexFile::kDexTypeHeaderItem, 1 },
     { DexFile::kDexTypeStringIdItem, 2 },
     { DexFile::kDexTypeTypeIdItem, 3 },
     { DexFile::kDexTypeProtoIdItem, 4 },
     { DexFile::kDexTypeFieldIdItem, 5 },
     { DexFile::kDexTypeMethodIdItem, 6 },
     { DexFile::kDexTypeClassDefItem, 7 },
     { DexFile::kDexTypeTypeList, 8 },
     { DexFile::kDexTypeAnnotationSetRefList, 9 },
     { DexFile::kDexTypeAnnotationSetItem, 10 },
     { DexFile::kDexTypeClassDataItem, 11 },
     { DexFile::kDexTypeCodeItem, 12 },
     { DexFile::kDexTypeStringDataItem, 13 },
     { DexFile::kDexTypeDebugInfoItem, 14 },
     { DexFile::kDexTypeAnnotationItem, 15 },
     { DexFile::kDexTypeEncodedArrayItem, 16 },
     { DexFile::kDexTypeAnnotationsDirectoryItem, 16 }
   };

   std::vector<SectionColor> table_;
   FILE* out_file_;

   DISALLOW_COPY_AND_ASSIGN(Dumper);
 };

 /*
  * Dumps a gnuplot data file showing the parts of the dex_file that belong to each class.
  * If profiling information is present, it dumps only those classes that are marked as hot.
  */
 void VisualizeDexLayout(dex_ir::Header* header, const DexFile* dex_file, size_t dex_file_index) {
   std::unique_ptr<Dumper> dumper(new Dumper(header->GetCollections(), dex_file_index));

   const uint32_t class_defs_size = header->GetCollections().ClassDefsSize();
   for (uint32_t class_index = 0; class_index < class_defs_size; class_index++) {
     dex_ir::ClassDef* class_def = header->GetCollections().GetClassDef(class_index);
     if (profile_info_ != nullptr && !profile_info_->ContainsClass(*dex_file, class_index)) {
       continue;
     }
     dumper->DumpAddressRange(class_def, class_index);
     // Type id.
     dumper->DumpTypeId(class_def->ClassType(), class_index);
     // Superclass type id.
     dumper->DumpTypeId(class_def->Superclass(), class_index);
     // Interfaces.
     // TODO(jeffhao): get TypeList from class_def to use Item interface.
     static constexpr uint32_t kInterfaceSizeKludge = 8;
     dumper->DumpAddressRange(class_def->InterfacesOffset(), kInterfaceSizeKludge, class_index);
     // Source file info.
     dumper->DumpStringId(class_def->SourceFile(), class_index);
     // Annotations.
     dumper->DumpAddressRange(class_def->Annotations(), class_index);
     // TODO(sehr): walk the annotations and dump them.
     // Class data.
     dex_ir::ClassData* class_data = class_def->GetClassData();
     if (class_data != nullptr) {
       dumper->DumpAddressRange(class_data, class_index);
       if (class_data->StaticFields()) {
         for (auto& field_item : *class_data->StaticFields()) {
           dumper->DumpFieldItem(field_item.get(), class_index);
         }
       }
       if (class_data->InstanceFields()) {
         for (auto& field_item : *class_data->InstanceFields()) {
           dumper->DumpFieldItem(field_item.get(), class_index);
         }
       }
       if (class_data->DirectMethods()) {
         for (auto& method_item : *class_data->DirectMethods()) {
           dumper->DumpMethodItem(method_item.get(), dex_file, class_index);
         }
       }
       if (class_data->VirtualMethods()) {
         for (auto& method_item : *class_data->VirtualMethods()) {
           dumper->DumpMethodItem(method_item.get(), dex_file, class_index);
         }
       }
     }
   }  // for
 }

 }  // namespace art
	/*
	* Copyright (C) 2016 The Android Open Source Project
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*
	* Implementation file of the dex layout visualization.
	*
	* This is a tool to read dex files into an internal representation,
	* reorganize the representation, and emit dex files with a better
	* file layout.
	*/

	#include "dex_visualize.h"

	#include <inttypes.h>
	#include <stdio.h>

	#include <functional>
	#include <memory>
	#include <vector>

	#include "dex_ir.h"
	#include "dexlayout.h"
	#include "jit/offline_profiling_info.h"

	namespace art {

	struct FileSection {
	public:
	std::string name_;
	uint16_t type_;
	std::function<uint32_t(const dex_ir::Collections&)> size_fn_;
	std::function<uint32_t(const dex_ir::Collections&)> offset_fn_;
	};

	static const std::vector<FileSection> kFileSections = {
	{
	"StringId",
	DexFile::kDexTypeStringIdItem,
	&dex_ir::Collections::StringIdsSize,
	&dex_ir::Collections::StringIdsOffset
	}, {
	"TypeId",
	DexFile::kDexTypeTypeIdItem,
	&dex_ir::Collections::TypeIdsSize,
	&dex_ir::Collections::TypeIdsOffset
	}, {
	"ProtoId",
	DexFile::kDexTypeProtoIdItem,
	&dex_ir::Collections::ProtoIdsSize,
	&dex_ir::Collections::ProtoIdsOffset
	}, {
	"FieldId",
	DexFile::kDexTypeFieldIdItem,
	&dex_ir::Collections::FieldIdsSize,
	&dex_ir::Collections::FieldIdsOffset
	}, {
	"MethodId",
	DexFile::kDexTypeMethodIdItem,
	&dex_ir::Collections::MethodIdsSize,
	&dex_ir::Collections::MethodIdsOffset
	}, {
	"ClassDef",
	DexFile::kDexTypeClassDefItem,
	&dex_ir::Collections::ClassDefsSize,
	&dex_ir::Collections::ClassDefsOffset
	}, {
	"StringData",
	DexFile::kDexTypeStringDataItem,
	&dex_ir::Collections::StringDatasSize,
	&dex_ir::Collections::StringDatasOffset
	}, {
	"TypeList",
	DexFile::kDexTypeTypeList,
	&dex_ir::Collections::TypeListsSize,
	&dex_ir::Collections::TypeListsOffset
	}, {
	"EncArr",
	DexFile::kDexTypeEncodedArrayItem,
	&dex_ir::Collections::EncodedArraySize,
	&dex_ir::Collections::EncodedArrayOffset
	}, {
	"Annotation",
	DexFile::kDexTypeAnnotationItem,
	&dex_ir::Collections::AnnotationSize,
	&dex_ir::Collections::AnnotationOffset
	}, {
	"AnnoSet",
	DexFile::kDexTypeAnnotationSetItem,
	&dex_ir::Collections::AnnotationSetSize,
	&dex_ir::Collections::AnnotationSetOffset
	}, {
	"AnnoSetRL",
	DexFile::kDexTypeAnnotationSetRefList,
	&dex_ir::Collections::AnnotationSetRefListsSize,
	&dex_ir::Collections::AnnotationSetRefListsOffset
	}, {
	"AnnoDir",
	DexFile::kDexTypeAnnotationsDirectoryItem,
	&dex_ir::Collections::AnnotationsDirectorySize,
	&dex_ir::Collections::AnnotationsDirectoryOffset
	}, {
	"DebugInfo",
	DexFile::kDexTypeDebugInfoItem,
	&dex_ir::Collections::DebugInfoSize,
	&dex_ir::Collections::DebugInfoOffset
	}, {
	"CodeItem",
	DexFile::kDexTypeCodeItem,
	&dex_ir::Collections::CodeItemsSize,
	&dex_ir::Collections::CodeItemsOffset
	}, {
	"ClassData",
	DexFile::kDexTypeClassDataItem,
	&dex_ir::Collections::ClassDatasSize,
	&dex_ir::Collections::ClassDatasOffset
	}
	};

	class Dumper {
	public:
	// Colors are based on the type of the section in MapList.
	Dumper(const dex_ir::Collections& collections, size_t dex_file_index) {
	// Build the table that will map from offset to color
	table_.emplace_back(DexFile::kDexTypeHeaderItem, 0u);
	for (const FileSection& s : kFileSections) {
	table_.emplace_back(s.type_, s.offset_fn_(collections));
	}
	// Sort into descending order by offset.
	std::sort(table_.begin(),
	table_.end(),
	[](const SectionColor& a, const SectionColor& b) { return a.offset_ > b.offset_; });
	// Open the file and emit the gnuplot prologue.
	std::string dex_file_name("classes");
	std::string out_file_base_name("layout");
	if (dex_file_index > 0) {
	out_file_base_name += std::to_string(dex_file_index + 1);
	dex_file_name += std::to_string(dex_file_index + 1);
	}
	dex_file_name += ".dex";
	std::string out_file_name(out_file_base_name + ".gnuplot");
	std::string png_file_name(out_file_base_name + ".png");
	out_file_ = fopen(out_file_name.c_str(), "w");
	fprintf(out_file_, "set terminal png size 1920,1080\n");
	fprintf(out_file_, "set output \"%s\"\n", png_file_name.c_str());
	fprintf(out_file_, "set title \"%s\"\n", dex_file_name.c_str());
	fprintf(out_file_, "set xlabel \"Page offset into dex\"\n");
	fprintf(out_file_, "set ylabel \"ClassDef index\"\n");
	fprintf(out_file_, "set xtics rotate out (");
	fprintf(out_file_, "\"Header\" %d, ", 0);
	bool printed_one = false;
	for (const FileSection& s : kFileSections) {
	if (s.size_fn_(collections) > 0) {
	if (printed_one) {
	fprintf(out_file_, ", ");
	}
	fprintf(out_file_, "\"%s\" %d", s.name_.c_str(), s.offset_fn_(collections) / kPageSize);
	printed_one = true;
	}
	}
	fprintf(out_file_, ")\n");
	fprintf(out_file_,
	"plot \"-\" using 1:2:3:4:5 with vector nohead linewidth 1 lc variable notitle\n");
	}

	int GetColor(uint32_t offset) const {
	// The dread linear search to find the right section for the reference.
	uint16_t section = 0;
	for (uint16_t i = 0; i < table_.size(); ++i) {
	if (table_[i].offset_ < offset) {
	section = table_[i].type_;
	break;
	}
	}
	// And a lookup table from type to color.
	ColorMapType::const_iterator iter = kColorMap.find(section);
	if (iter != kColorMap.end()) {
	return iter->second;
	}
	return 0;
	}

	void DumpAddressRange(uint32_t from, uint32_t size, int class_index) {
	const uint32_t low_page = from / kPageSize;
	const uint32_t high_page = (size > 0) ? (from + size - 1) / kPageSize : low_page;
	const uint32_t size_delta = high_page - low_page;
	fprintf(out_file_, "%d %d %d 0 %d\n", low_page, class_index, size_delta, GetColor(from));
	}

	void DumpAddressRange(const dex_ir::Item* item, int class_index) {
	if (item != nullptr) {
	DumpAddressRange(item->GetOffset(), item->GetSize(), class_index);
	}
	}

	void DumpStringData(const dex_ir::StringData* string_data, int class_index) {
	DumpAddressRange(string_data, class_index);
	}

	void DumpStringId(const dex_ir::StringId* string_id, int class_index) {
	DumpAddressRange(string_id, class_index);
	if (string_id == nullptr) {
	return;
	}
	DumpStringData(string_id->DataItem(), class_index);
	}

	void DumpTypeId(const dex_ir::TypeId* type_id, int class_index) {
	DumpAddressRange(type_id, class_index);
	DumpStringId(type_id->GetStringId(), class_index);
	}

	void DumpFieldId(const dex_ir::FieldId* field_id, int class_index) {
	DumpAddressRange(field_id, class_index);
	if (field_id == nullptr) {
	return;
	}
	DumpTypeId(field_id->Class(), class_index);
	DumpTypeId(field_id->Type(), class_index);
	DumpStringId(field_id->Name(), class_index);
	}

	void DumpFieldItem(const dex_ir::FieldItem* field, int class_index) {
	DumpAddressRange(field, class_index);
	if (field == nullptr) {
	return;
	}
	DumpFieldId(field->GetFieldId(), class_index);
	}

	void DumpProtoId(const dex_ir::ProtoId* proto_id, int class_index) {
	DumpAddressRange(proto_id, class_index);
	if (proto_id == nullptr) {
	return;
	}
	DumpStringId(proto_id->Shorty(), class_index);
	const dex_ir::TypeIdVector& parameters = proto_id->Parameters();
	for (const dex_ir::TypeId* t : parameters) {
	DumpTypeId(t, class_index);
	}
	DumpTypeId(proto_id->ReturnType(), class_index);
	}

	void DumpMethodId(const dex_ir::MethodId* method_id, int class_index) {
	DumpAddressRange(method_id, class_index);
	if (method_id == nullptr) {
	return;
	}
	DumpTypeId(method_id->Class(), class_index);
	DumpProtoId(method_id->Proto(), class_index);
	DumpStringId(method_id->Name(), class_index);
	}

	void DumpMethodItem(const dex_ir::MethodItem* method, const DexFile* dex_file, int class_index) {
	if (profile_info_ != nullptr) {
	uint32_t method_idx = method->GetMethodId()->GetIndex();
	MethodReference mr(dex_file, method_idx);
	if (!profile_info_->ContainsMethod(mr)) {
	return;
	}
	}
	DumpAddressRange(method, class_index);
	if (method == nullptr) {
	return;
	}
	DumpMethodId(method->GetMethodId(), class_index);
	const dex_ir::CodeItem* code_item = method->GetCodeItem();
	if (code_item != nullptr) {
	DumpAddressRange(code_item, class_index);
	}
	}

	~Dumper() {
	fclose(out_file_);
	}

	private:
	struct SectionColor {
	public:
	SectionColor(uint16_t type, uint32_t offset) : type_(type), offset_(offset) { }
	uint16_t type_;
	uint32_t offset_;
	};

	using ColorMapType = std::map<uint16_t, int>;
	const ColorMapType kColorMap = {
	{ DexFile::kDexTypeHeaderItem, 1 },
	{ DexFile::kDexTypeStringIdItem, 2 },
	{ DexFile::kDexTypeTypeIdItem, 3 },
	{ DexFile::kDexTypeProtoIdItem, 4 },
	{ DexFile::kDexTypeFieldIdItem, 5 },
	{ DexFile::kDexTypeMethodIdItem, 6 },
	{ DexFile::kDexTypeClassDefItem, 7 },
	{ DexFile::kDexTypeTypeList, 8 },
	{ DexFile::kDexTypeAnnotationSetRefList, 9 },
	{ DexFile::kDexTypeAnnotationSetItem, 10 },
	{ DexFile::kDexTypeClassDataItem, 11 },
	{ DexFile::kDexTypeCodeItem, 12 },
	{ DexFile::kDexTypeStringDataItem, 13 },
	{ DexFile::kDexTypeDebugInfoItem, 14 },
	{ DexFile::kDexTypeAnnotationItem, 15 },
	{ DexFile::kDexTypeEncodedArrayItem, 16 },
	{ DexFile::kDexTypeAnnotationsDirectoryItem, 16 }
	};

	std::vector<SectionColor> table_;
	FILE* out_file_;

	DISALLOW_COPY_AND_ASSIGN(Dumper);
	};

	/*
	* Dumps a gnuplot data file showing the parts of the dex_file that belong to each class.
	* If profiling information is present, it dumps only those classes that are marked as hot.
	*/
	void VisualizeDexLayout(dex_ir::Header* header, const DexFile* dex_file, size_t dex_file_index) {
	std::unique_ptr<Dumper> dumper(new Dumper(header->GetCollections(), dex_file_index));

	const uint32_t class_defs_size = header->GetCollections().ClassDefsSize();
	for (uint32_t class_index = 0; class_index < class_defs_size; class_index++) {
	dex_ir::ClassDef* class_def = header->GetCollections().GetClassDef(class_index);
	if (profile_info_ != nullptr && !profile_info_->ContainsClass(*dex_file, class_index)) {
	continue;
	}
	dumper->DumpAddressRange(class_def, class_index);
	// Type id.
	dumper->DumpTypeId(class_def->ClassType(), class_index);
	// Superclass type id.
	dumper->DumpTypeId(class_def->Superclass(), class_index);
	// Interfaces.
	// TODO(jeffhao): get TypeList from class_def to use Item interface.
	static constexpr uint32_t kInterfaceSizeKludge = 8;
	dumper->DumpAddressRange(class_def->InterfacesOffset(), kInterfaceSizeKludge, class_index);
	// Source file info.
	dumper->DumpStringId(class_def->SourceFile(), class_index);
	// Annotations.
	dumper->DumpAddressRange(class_def->Annotations(), class_index);
	// TODO(sehr): walk the annotations and dump them.
	// Class data.
	dex_ir::ClassData* class_data = class_def->GetClassData();
	if (class_data != nullptr) {
	dumper->DumpAddressRange(class_data, class_index);
	if (class_data->StaticFields()) {
	for (auto& field_item : *class_data->StaticFields()) {
	dumper->DumpFieldItem(field_item.get(), class_index);
	}
	}
	if (class_data->InstanceFields()) {
	for (auto& field_item : *class_data->InstanceFields()) {
	dumper->DumpFieldItem(field_item.get(), class_index);
	}
	}
	if (class_data->DirectMethods()) {
	for (auto& method_item : *class_data->DirectMethods()) {
	dumper->DumpMethodItem(method_item.get(), dex_file, class_index);
	}
	}
	if (class_data->VirtualMethods()) {
	for (auto& method_item : *class_data->VirtualMethods()) {
	dumper->DumpMethodItem(method_item.get(), dex_file, class_index);
	}
	}
	}
	} // for
	}

	} // namespace art