llvm/lib/DebugInfo/Symbolize/DIPrinter.cpp - rust-lang/llvm-project - Git at Google

 //===- lib/DebugInfo/Symbolize/DIPrinter.cpp ------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 //
 // This file defines the DIPrinter class, which is responsible for printing
 // structures defined in DebugInfo/DIContext.h
 //
 //===----------------------------------------------------------------------===//

 #include "llvm/DebugInfo/Symbolize/DIPrinter.h"
 #include "llvm/ADT/StringRef.h"
 #include "llvm/DebugInfo/DIContext.h"
 #include "llvm/Support/ErrorOr.h"
 #include "llvm/Support/Format.h"
 #include "llvm/Support/MemoryBuffer.h"
 #include "llvm/Support/raw_ostream.h"
 #include <algorithm>
 #include <cmath>
 #include <cstddef>
 #include <cstdint>
 #include <memory>
 #include <string>

 namespace llvm {
 namespace symbolize {

 class SourceCode {
   std::unique_ptr<MemoryBuffer> MemBuf;

   Optional<StringRef> load(StringRef FileName,
                            const Optional<StringRef> &EmbeddedSource) {
     if (Lines <= 0)
       return None;

     if (EmbeddedSource)
       return EmbeddedSource;
     else {
       ErrorOr<std::unique_ptr<MemoryBuffer>> BufOrErr =
           MemoryBuffer::getFile(FileName);
       if (!BufOrErr)
         return None;
       MemBuf = std::move(*BufOrErr);
       return MemBuf->getBuffer();
     }
   }

   Optional<StringRef> pruneSource(const Optional<StringRef> &Source) {
     if (!Source)
       return None;
     size_t FirstLinePos = StringRef::npos, Pos = 0;
     for (int64_t L = 1; L <= LastLine; ++L, ++Pos) {
       if (L == FirstLine)
         FirstLinePos = Pos;
       Pos = Source->find('\n', Pos);
       if (Pos == StringRef::npos)
         break;
     }
     if (FirstLinePos == StringRef::npos)
       return None;
     return Source->substr(FirstLinePos, (Pos == StringRef::npos)
                                             ? StringRef::npos
                                             : Pos - FirstLinePos);
   }

 public:
   const int64_t Line;
   const int Lines;
   const int64_t FirstLine;
   const int64_t LastLine;
   const Optional<StringRef> PrunedSource;

   SourceCode(
       StringRef FileName, int64_t Line, int Lines,
       const Optional<StringRef> &EmbeddedSource = Optional<StringRef>(None))
       : Line(Line), Lines(Lines),
         FirstLine(std::max(static_cast<int64_t>(1), Line - Lines / 2)),
         LastLine(FirstLine + Lines - 1),
         PrunedSource(pruneSource(load(FileName, EmbeddedSource))) {}

   void format(raw_ostream &OS) {
     if (!PrunedSource)
       return;
     size_t MaxLineNumberWidth = std::ceil(std::log10(LastLine));
     int64_t L = FirstLine;
     for (size_t Pos = 0; Pos < PrunedSource->size(); ++L) {
       size_t PosEnd = PrunedSource->find('\n', Pos);
       StringRef String = PrunedSource->substr(
           Pos, (PosEnd == StringRef::npos) ? StringRef::npos : (PosEnd - Pos));
       if (String.endswith("\r"))
         String = String.drop_back(1);
       OS << format_decimal(L, MaxLineNumberWidth);
       if (L == Line)
         OS << " >: ";
       else
         OS << "  : ";
       OS << String << '\n';
       if (PosEnd == StringRef::npos)
         break;
       Pos = PosEnd + 1;
     }
   }
 };

 void PlainPrinterBase::printHeader(uint64_t Address) {
   if (Config.PrintAddress) {
     OS << "0x";
     OS.write_hex(Address);
     StringRef Delimiter = Config.Pretty ? ": " : "\n";
     OS << Delimiter;
   }
 }

 // Prints source code around in the FileName the Line.
 void PlainPrinterBase::printContext(SourceCode SourceCode) {
   SourceCode.format(OS);
 }

 void PlainPrinterBase::printFunctionName(StringRef FunctionName, bool Inlined) {
   if (Config.PrintFunctions) {
     if (FunctionName == DILineInfo::BadString)
       FunctionName = DILineInfo::Addr2LineBadString;
     StringRef Delimiter = Config.Pretty ? " at " : "\n";
     StringRef Prefix = (Config.Pretty && Inlined) ? " (inlined by) " : "";
     OS << Prefix << FunctionName << Delimiter;
   }
 }

 void LLVMPrinter::printSimpleLocation(StringRef Filename,
                                       const DILineInfo &Info) {
   OS << Filename << ':' << Info.Line << ':' << Info.Column << '\n';
   printContext(
       SourceCode(Filename, Info.Line, Config.SourceContextLines, Info.Source));
 }

 void GNUPrinter::printSimpleLocation(StringRef Filename,
                                      const DILineInfo &Info) {
   OS << Filename << ':' << Info.Line;
   if (Info.Discriminator)
     OS << " (discriminator " << Info.Discriminator << ')';
   OS << '\n';
   printContext(
       SourceCode(Filename, Info.Line, Config.SourceContextLines, Info.Source));
 }

 void PlainPrinterBase::printVerbose(StringRef Filename,
                                     const DILineInfo &Info) {
   OS << "  Filename: " << Filename << '\n';
   if (Info.StartLine) {
     OS << "  Function start filename: " << Info.StartFileName << '\n';
     OS << "  Function start line: " << Info.StartLine << '\n';
   }
   printStartAddress(Info);
   OS << "  Line: " << Info.Line << '\n';
   OS << "  Column: " << Info.Column << '\n';
   if (Info.Discriminator)
     OS << "  Discriminator: " << Info.Discriminator << '\n';
 }

 void LLVMPrinter::printStartAddress(const DILineInfo &Info) {
   if (Info.StartAddress) {
     OS << "  Function start address: 0x";
     OS.write_hex(*Info.StartAddress);
     OS << '\n';
   }
 }

 void LLVMPrinter::printFooter() { OS << '\n'; }

 void PlainPrinterBase::print(const DILineInfo &Info, bool Inlined) {
   printFunctionName(Info.FunctionName, Inlined);
   StringRef Filename = Info.FileName;
   if (Filename == DILineInfo::BadString)
     Filename = DILineInfo::Addr2LineBadString;
   if (Config.Verbose)
     printVerbose(Filename, Info);
   else
     printSimpleLocation(Filename, Info);
 }

 void PlainPrinterBase::print(const Request &Request, const DILineInfo &Info) {
   printHeader(*Request.Address);
   print(Info, false);
   printFooter();
 }

 void PlainPrinterBase::print(const Request &Request,
                              const DIInliningInfo &Info) {
   printHeader(*Request.Address);
   uint32_t FramesNum = Info.getNumberOfFrames();
   if (FramesNum == 0)
     print(DILineInfo(), false);
   else
     for (uint32_t I = 0; I < FramesNum; ++I)
       print(Info.getFrame(I), I > 0);
   printFooter();
 }

 void PlainPrinterBase::print(const Request &Request, const DIGlobal &Global) {
   printHeader(*Request.Address);
   StringRef Name = Global.Name;
   if (Name == DILineInfo::BadString)
     Name = DILineInfo::Addr2LineBadString;
   OS << Name << "\n";
   OS << Global.Start << " " << Global.Size << "\n";
   if (Global.DeclFile.empty())
     OS << "??:?\n";
   else
     OS << Global.DeclFile << ":" << Global.DeclLine << "\n";
   printFooter();
 }

 void PlainPrinterBase::print(const Request &Request,
                              const std::vector<DILocal> &Locals) {
   printHeader(*Request.Address);
   if (Locals.empty())
     OS << DILineInfo::Addr2LineBadString << '\n';
   else
     for (const DILocal &L : Locals) {
       if (L.FunctionName.empty())
         OS << DILineInfo::Addr2LineBadString;
       else
         OS << L.FunctionName;
       OS << '\n';

       if (L.Name.empty())
         OS << DILineInfo::Addr2LineBadString;
       else
         OS << L.Name;
       OS << '\n';

       if (L.DeclFile.empty())
         OS << DILineInfo::Addr2LineBadString;
       else
         OS << L.DeclFile;

       OS << ':' << L.DeclLine << '\n';

       if (L.FrameOffset)
         OS << *L.FrameOffset;
       else
         OS << DILineInfo::Addr2LineBadString;
       OS << ' ';

       if (L.Size)
         OS << *L.Size;
       else
         OS << DILineInfo::Addr2LineBadString;
       OS << ' ';

       if (L.TagOffset)
         OS << *L.TagOffset;
       else
         OS << DILineInfo::Addr2LineBadString;
       OS << '\n';
     }
   printFooter();
 }

 void PlainPrinterBase::printInvalidCommand(const Request &Request,
                                            StringRef Command) {
   OS << Command << '\n';
 }

 bool PlainPrinterBase::printError(const Request &Request,
                                   const ErrorInfoBase &ErrorInfo,
                                   StringRef ErrorBanner) {
   ES << ErrorBanner;
   ErrorInfo.log(ES);
   ES << '\n';
   // Print an empty struct too.
   return true;
 }

 static std::string toHex(uint64_t V) {
   return ("0x" + Twine::utohexstr(V)).str();
 }

 static json::Object toJSON(const Request &Request, StringRef ErrorMsg = "") {
   json::Object Json({{"ModuleName", Request.ModuleName.str()}});
   if (Request.Address)
     Json["Address"] = toHex(*Request.Address);
   if (!ErrorMsg.empty())
     Json["Error"] = json::Object({{"Message", ErrorMsg.str()}});
   return Json;
 }

 void JSONPrinter::print(const Request &Request, const DILineInfo &Info) {
   DIInliningInfo InliningInfo;
   InliningInfo.addFrame(Info);
   print(Request, InliningInfo);
 }

 void JSONPrinter::print(const Request &Request, const DIInliningInfo &Info) {
   json::Array Array;
   for (uint32_t I = 0, N = Info.getNumberOfFrames(); I < N; ++I) {
     const DILineInfo &LineInfo = Info.getFrame(I);
     json::Object Object(
         {{"FunctionName", LineInfo.FunctionName != DILineInfo::BadString
                               ? LineInfo.FunctionName
                               : ""},
          {"StartFileName", LineInfo.StartFileName != DILineInfo::BadString
                                ? LineInfo.StartFileName
                                : ""},
          {"StartLine", LineInfo.StartLine},
          {"StartAddress",
           LineInfo.StartAddress ? toHex(*LineInfo.StartAddress) : ""},
          {"FileName",
           LineInfo.FileName != DILineInfo::BadString ? LineInfo.FileName : ""},
          {"Line", LineInfo.Line},
          {"Column", LineInfo.Column},
          {"Discriminator", LineInfo.Discriminator}});
     SourceCode SourceCode(LineInfo.FileName, LineInfo.Line,
                           Config.SourceContextLines, LineInfo.Source);
     std::string FormattedSource;
     raw_string_ostream Stream(FormattedSource);
     SourceCode.format(Stream);
     if (!FormattedSource.empty())
       Object["Source"] = std::move(FormattedSource);
     Array.push_back(std::move(Object));
   }
   json::Object Json = toJSON(Request);
   Json["Symbol"] = std::move(Array);
   if (ObjectList)
     ObjectList->push_back(std::move(Json));
   else
     printJSON(std::move(Json));
 }

 void JSONPrinter::print(const Request &Request, const DIGlobal &Global) {
   json::Object Data(
       {{"Name", Global.Name != DILineInfo::BadString ? Global.Name : ""},
        {"Start", toHex(Global.Start)},
        {"Size", toHex(Global.Size)}});
   json::Object Json = toJSON(Request);
   Json["Data"] = std::move(Data);
   if (ObjectList)
     ObjectList->push_back(std::move(Json));
   else
     printJSON(std::move(Json));
 }

 void JSONPrinter::print(const Request &Request,
                         const std::vector<DILocal> &Locals) {
   json::Array Frame;
   for (const DILocal &Local : Locals) {
     json::Object FrameObject(
         {{"FunctionName", Local.FunctionName},
          {"Name", Local.Name},
          {"DeclFile", Local.DeclFile},
          {"DeclLine", int64_t(Local.DeclLine)},
          {"Size", Local.Size ? toHex(*Local.Size) : ""},
          {"TagOffset", Local.TagOffset ? toHex(*Local.TagOffset) : ""}});
     if (Local.FrameOffset)
       FrameObject["FrameOffset"] = *Local.FrameOffset;
     Frame.push_back(std::move(FrameObject));
   }
   json::Object Json = toJSON(Request);
   Json["Frame"] = std::move(Frame);
   if (ObjectList)
     ObjectList->push_back(std::move(Json));
   else
     printJSON(std::move(Json));
 }

 void JSONPrinter::printInvalidCommand(const Request &Request,
                                       StringRef Command) {
   printError(Request,
              StringError("unable to parse arguments: " + Command,
                          std::make_error_code(std::errc::invalid_argument)),
              "");
 }

 bool JSONPrinter::printError(const Request &Request,
                              const ErrorInfoBase &ErrorInfo,
                              StringRef ErrorBanner) {
   json::Object Json = toJSON(Request, ErrorInfo.message());
   if (ObjectList)
     ObjectList->push_back(std::move(Json));
   else
     printJSON(std::move(Json));
   return false;
 }

 void JSONPrinter::listBegin() {
   assert(!ObjectList);
   ObjectList = std::make_unique<json::Array>();
 }

 void JSONPrinter::listEnd() {
   assert(ObjectList);
   printJSON(std::move(*ObjectList));
   ObjectList.reset();
 }

 } // end namespace symbolize
 } // end namespace llvm
	//===- lib/DebugInfo/Symbolize/DIPrinter.cpp ------------------------------===//
	//
	// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
	// See https://llvm.org/LICENSE.txt for license information.
	// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
	//
	//===----------------------------------------------------------------------===//
	//
	// This file defines the DIPrinter class, which is responsible for printing
	// structures defined in DebugInfo/DIContext.h
	//
	//===----------------------------------------------------------------------===//

	#include "llvm/DebugInfo/Symbolize/DIPrinter.h"
	#include "llvm/ADT/StringRef.h"
	#include "llvm/DebugInfo/DIContext.h"
	#include "llvm/Support/ErrorOr.h"
	#include "llvm/Support/Format.h"
	#include "llvm/Support/MemoryBuffer.h"
	#include "llvm/Support/raw_ostream.h"
	#include <algorithm>
	#include <cmath>
	#include <cstddef>
	#include <cstdint>
	#include <memory>
	#include <string>

	namespace llvm {
	namespace symbolize {

	class SourceCode {
	std::unique_ptr<MemoryBuffer> MemBuf;

	Optional<StringRef> load(StringRef FileName,
	const Optional<StringRef> &EmbeddedSource) {
	if (Lines <= 0)
	return None;

	if (EmbeddedSource)
	return EmbeddedSource;
	else {
	ErrorOr<std::unique_ptr<MemoryBuffer>> BufOrErr =
	MemoryBuffer::getFile(FileName);
	if (!BufOrErr)
	return None;
	MemBuf = std::move(*BufOrErr);
	return MemBuf->getBuffer();
	}
	}

	Optional<StringRef> pruneSource(const Optional<StringRef> &Source) {
	if (!Source)
	return None;
	size_t FirstLinePos = StringRef::npos, Pos = 0;
	for (int64_t L = 1; L <= LastLine; ++L, ++Pos) {
	if (L == FirstLine)
	FirstLinePos = Pos;
	Pos = Source->find('\n', Pos);
	if (Pos == StringRef::npos)
	break;
	}
	if (FirstLinePos == StringRef::npos)
	return None;
	return Source->substr(FirstLinePos, (Pos == StringRef::npos)
	? StringRef::npos
	: Pos - FirstLinePos);
	}

	public:
	const int64_t Line;
	const int Lines;
	const int64_t FirstLine;
	const int64_t LastLine;
	const Optional<StringRef> PrunedSource;

	SourceCode(
	StringRef FileName, int64_t Line, int Lines,
	const Optional<StringRef> &EmbeddedSource = Optional<StringRef>(None))
	: Line(Line), Lines(Lines),
	FirstLine(std::max(static_cast<int64_t>(1), Line - Lines / 2)),
	LastLine(FirstLine + Lines - 1),
	PrunedSource(pruneSource(load(FileName, EmbeddedSource))) {}

	void format(raw_ostream &OS) {
	if (!PrunedSource)
	return;
	size_t MaxLineNumberWidth = std::ceil(std::log10(LastLine));
	int64_t L = FirstLine;
	for (size_t Pos = 0; Pos < PrunedSource->size(); ++L) {
	size_t PosEnd = PrunedSource->find('\n', Pos);
	StringRef String = PrunedSource->substr(
	Pos, (PosEnd == StringRef::npos) ? StringRef::npos : (PosEnd - Pos));
	if (String.endswith("\r"))
	String = String.drop_back(1);
	OS << format_decimal(L, MaxLineNumberWidth);
	if (L == Line)
	OS << " >: ";
	else
	OS << " : ";
	OS << String << '\n';
	if (PosEnd == StringRef::npos)
	break;
	Pos = PosEnd + 1;
	}
	}
	};

	void PlainPrinterBase::printHeader(uint64_t Address) {
	if (Config.PrintAddress) {
	OS << "0x";
	OS.write_hex(Address);
	StringRef Delimiter = Config.Pretty ? ": " : "\n";
	OS << Delimiter;
	}
	}

	// Prints source code around in the FileName the Line.
	void PlainPrinterBase::printContext(SourceCode SourceCode) {
	SourceCode.format(OS);
	}

	void PlainPrinterBase::printFunctionName(StringRef FunctionName, bool Inlined) {
	if (Config.PrintFunctions) {
	if (FunctionName == DILineInfo::BadString)
	FunctionName = DILineInfo::Addr2LineBadString;
	StringRef Delimiter = Config.Pretty ? " at " : "\n";
	StringRef Prefix = (Config.Pretty && Inlined) ? " (inlined by) " : "";
	OS << Prefix << FunctionName << Delimiter;
	}
	}

	void LLVMPrinter::printSimpleLocation(StringRef Filename,
	const DILineInfo &Info) {
	OS << Filename << ':' << Info.Line << ':' << Info.Column << '\n';
	printContext(
	SourceCode(Filename, Info.Line, Config.SourceContextLines, Info.Source));
	}

	void GNUPrinter::printSimpleLocation(StringRef Filename,
	const DILineInfo &Info) {
	OS << Filename << ':' << Info.Line;
	if (Info.Discriminator)
	OS << " (discriminator " << Info.Discriminator << ')';
	OS << '\n';
	printContext(
	SourceCode(Filename, Info.Line, Config.SourceContextLines, Info.Source));
	}

	void PlainPrinterBase::printVerbose(StringRef Filename,
	const DILineInfo &Info) {
	OS << " Filename: " << Filename << '\n';
	if (Info.StartLine) {
	OS << " Function start filename: " << Info.StartFileName << '\n';
	OS << " Function start line: " << Info.StartLine << '\n';
	}
	printStartAddress(Info);
	OS << " Line: " << Info.Line << '\n';
	OS << " Column: " << Info.Column << '\n';
	if (Info.Discriminator)
	OS << " Discriminator: " << Info.Discriminator << '\n';
	}

	void LLVMPrinter::printStartAddress(const DILineInfo &Info) {
	if (Info.StartAddress) {
	OS << " Function start address: 0x";
	OS.write_hex(*Info.StartAddress);
	OS << '\n';
	}
	}

	void LLVMPrinter::printFooter() { OS << '\n'; }

	void PlainPrinterBase::print(const DILineInfo &Info, bool Inlined) {
	printFunctionName(Info.FunctionName, Inlined);
	StringRef Filename = Info.FileName;
	if (Filename == DILineInfo::BadString)
	Filename = DILineInfo::Addr2LineBadString;
	if (Config.Verbose)
	printVerbose(Filename, Info);
	else
	printSimpleLocation(Filename, Info);
	}

	void PlainPrinterBase::print(const Request &Request, const DILineInfo &Info) {
	printHeader(*Request.Address);
	print(Info, false);
	printFooter();
	}

	void PlainPrinterBase::print(const Request &Request,
	const DIInliningInfo &Info) {
	printHeader(*Request.Address);
	uint32_t FramesNum = Info.getNumberOfFrames();
	if (FramesNum == 0)
	print(DILineInfo(), false);
	else
	for (uint32_t I = 0; I < FramesNum; ++I)
	print(Info.getFrame(I), I > 0);
	printFooter();
	}

	void PlainPrinterBase::print(const Request &Request, const DIGlobal &Global) {
	printHeader(*Request.Address);
	StringRef Name = Global.Name;
	if (Name == DILineInfo::BadString)
	Name = DILineInfo::Addr2LineBadString;
	OS << Name << "\n";
	OS << Global.Start << " " << Global.Size << "\n";
	if (Global.DeclFile.empty())
	OS << "??:?\n";
	else
	OS << Global.DeclFile << ":" << Global.DeclLine << "\n";
	printFooter();
	}

	void PlainPrinterBase::print(const Request &Request,
	const std::vector<DILocal> &Locals) {
	printHeader(*Request.Address);
	if (Locals.empty())
	OS << DILineInfo::Addr2LineBadString << '\n';
	else
	for (const DILocal &L : Locals) {
	if (L.FunctionName.empty())
	OS << DILineInfo::Addr2LineBadString;
	else
	OS << L.FunctionName;
	OS << '\n';

	if (L.Name.empty())
	OS << DILineInfo::Addr2LineBadString;
	else
	OS << L.Name;
	OS << '\n';

	if (L.DeclFile.empty())
	OS << DILineInfo::Addr2LineBadString;
	else
	OS << L.DeclFile;

	OS << ':' << L.DeclLine << '\n';

	if (L.FrameOffset)
	OS << *L.FrameOffset;
	else
	OS << DILineInfo::Addr2LineBadString;
	OS << ' ';

	if (L.Size)
	OS << *L.Size;
	else
	OS << DILineInfo::Addr2LineBadString;
	OS << ' ';

	if (L.TagOffset)
	OS << *L.TagOffset;
	else
	OS << DILineInfo::Addr2LineBadString;
	OS << '\n';
	}
	printFooter();
	}

	void PlainPrinterBase::printInvalidCommand(const Request &Request,
	StringRef Command) {
	OS << Command << '\n';
	}

	bool PlainPrinterBase::printError(const Request &Request,
	const ErrorInfoBase &ErrorInfo,
	StringRef ErrorBanner) {
	ES << ErrorBanner;
	ErrorInfo.log(ES);
	ES << '\n';
	// Print an empty struct too.
	return true;
	}

	static std::string toHex(uint64_t V) {
	return ("0x" + Twine::utohexstr(V)).str();
	}

	static json::Object toJSON(const Request &Request, StringRef ErrorMsg = "") {
	json::Object Json({{"ModuleName", Request.ModuleName.str()}});
	if (Request.Address)
	Json["Address"] = toHex(*Request.Address);
	if (!ErrorMsg.empty())
	Json["Error"] = json::Object({{"Message", ErrorMsg.str()}});
	return Json;
	}

	void JSONPrinter::print(const Request &Request, const DILineInfo &Info) {
	DIInliningInfo InliningInfo;
	InliningInfo.addFrame(Info);
	print(Request, InliningInfo);
	}

	void JSONPrinter::print(const Request &Request, const DIInliningInfo &Info) {
	json::Array Array;
	for (uint32_t I = 0, N = Info.getNumberOfFrames(); I < N; ++I) {
	const DILineInfo &LineInfo = Info.getFrame(I);
	json::Object Object(
	{{"FunctionName", LineInfo.FunctionName != DILineInfo::BadString
	? LineInfo.FunctionName
	: ""},
	{"StartFileName", LineInfo.StartFileName != DILineInfo::BadString
	? LineInfo.StartFileName
	: ""},
	{"StartLine", LineInfo.StartLine},
	{"StartAddress",
	LineInfo.StartAddress ? toHex(*LineInfo.StartAddress) : ""},
	{"FileName",
	LineInfo.FileName != DILineInfo::BadString ? LineInfo.FileName : ""},
	{"Line", LineInfo.Line},
	{"Column", LineInfo.Column},
	{"Discriminator", LineInfo.Discriminator}});
	SourceCode SourceCode(LineInfo.FileName, LineInfo.Line,
	Config.SourceContextLines, LineInfo.Source);
	std::string FormattedSource;
	raw_string_ostream Stream(FormattedSource);
	SourceCode.format(Stream);
	if (!FormattedSource.empty())
	Object["Source"] = std::move(FormattedSource);
	Array.push_back(std::move(Object));
	}
	json::Object Json = toJSON(Request);
	Json["Symbol"] = std::move(Array);
	if (ObjectList)
	ObjectList->push_back(std::move(Json));
	else
	printJSON(std::move(Json));
	}

	void JSONPrinter::print(const Request &Request, const DIGlobal &Global) {
	json::Object Data(
	{{"Name", Global.Name != DILineInfo::BadString ? Global.Name : ""},
	{"Start", toHex(Global.Start)},
	{"Size", toHex(Global.Size)}});
	json::Object Json = toJSON(Request);
	Json["Data"] = std::move(Data);
	if (ObjectList)
	ObjectList->push_back(std::move(Json));
	else
	printJSON(std::move(Json));
	}

	void JSONPrinter::print(const Request &Request,
	const std::vector<DILocal> &Locals) {
	json::Array Frame;
	for (const DILocal &Local : Locals) {
	json::Object FrameObject(
	{{"FunctionName", Local.FunctionName},
	{"Name", Local.Name},
	{"DeclFile", Local.DeclFile},
	{"DeclLine", int64_t(Local.DeclLine)},
	{"Size", Local.Size ? toHex(*Local.Size) : ""},
	{"TagOffset", Local.TagOffset ? toHex(*Local.TagOffset) : ""}});
	if (Local.FrameOffset)
	FrameObject["FrameOffset"] = *Local.FrameOffset;
	Frame.push_back(std::move(FrameObject));
	}
	json::Object Json = toJSON(Request);
	Json["Frame"] = std::move(Frame);
	if (ObjectList)
	ObjectList->push_back(std::move(Json));
	else
	printJSON(std::move(Json));
	}

	void JSONPrinter::printInvalidCommand(const Request &Request,
	StringRef Command) {
	printError(Request,
	StringError("unable to parse arguments: " + Command,
	std::make_error_code(std::errc::invalid_argument)),
	"");
	}

	bool JSONPrinter::printError(const Request &Request,
	const ErrorInfoBase &ErrorInfo,
	StringRef ErrorBanner) {
	json::Object Json = toJSON(Request, ErrorInfo.message());
	if (ObjectList)
	ObjectList->push_back(std::move(Json));
	else
	printJSON(std::move(Json));
	return false;
	}

	void JSONPrinter::listBegin() {
	assert(!ObjectList);
	ObjectList = std::make_unique<json::Array>();
	}

	void JSONPrinter::listEnd() {
	assert(ObjectList);
	printJSON(std::move(*ObjectList));
	ObjectList.reset();
	}

	} // end namespace symbolize
	} // end namespace llvm