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a1a19f803c
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30997 91177308-0d34-0410-b5e6-96231b3b80d8
2663 lines
83 KiB
C++
2663 lines
83 KiB
C++
//===-- llvm/CodeGen/DwarfWriter.cpp - Dwarf Framework ----------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by James M. Laskey and is distributed under the
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// University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file contains support for writing dwarf debug info into asm files.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/CodeGen/DwarfWriter.h"
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#include "llvm/ADT/StringExtras.h"
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#include "llvm/Module.h"
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#include "llvm/Type.h"
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#include "llvm/CodeGen/AsmPrinter.h"
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#include "llvm/CodeGen/MachineDebugInfo.h"
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#include "llvm/CodeGen/MachineFrameInfo.h"
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#include "llvm/CodeGen/MachineLocation.h"
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#include "llvm/Support/Dwarf.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/Mangler.h"
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#include "llvm/Target/TargetAsmInfo.h"
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#include "llvm/Target/MRegisterInfo.h"
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#include "llvm/Target/TargetData.h"
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#include "llvm/Target/TargetMachine.h"
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#include "llvm/Target/TargetFrameInfo.h"
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#include <iostream>
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using namespace llvm;
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using namespace llvm::dwarf;
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static cl::opt<bool>
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DwarfVerbose("dwarf-verbose", cl::Hidden,
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cl::desc("Add comments to Dwarf directives."));
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namespace llvm {
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//===----------------------------------------------------------------------===//
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// Forward declarations.
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//
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class DIE;
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//===----------------------------------------------------------------------===//
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// CompileUnit - This dwarf writer support class manages information associate
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// with a source file.
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class CompileUnit {
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private:
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CompileUnitDesc *Desc; // Compile unit debug descriptor.
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unsigned ID; // File ID for source.
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DIE *Die; // Compile unit debug information entry.
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std::map<std::string, DIE *> Globals; // A map of globally visible named
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// entities for this unit.
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std::map<DebugInfoDesc *, DIE *> DescToDieMap;
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// Tracks the mapping of unit level
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// debug informaton descriptors to debug
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// information entries.
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public:
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CompileUnit(CompileUnitDesc *CUD, unsigned I, DIE *D)
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: Desc(CUD)
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, ID(I)
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, Die(D)
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, Globals()
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, DescToDieMap()
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{}
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~CompileUnit();
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// Accessors.
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CompileUnitDesc *getDesc() const { return Desc; }
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unsigned getID() const { return ID; }
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DIE* getDie() const { return Die; }
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std::map<std::string, DIE *> &getGlobals() { return Globals; }
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/// hasContent - Return true if this compile unit has something to write out.
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///
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bool hasContent() const;
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/// AddGlobal - Add a new global entity to the compile unit.
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///
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void AddGlobal(const std::string &Name, DIE *Die);
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/// getDieMapSlotFor - Returns the debug information entry map slot for the
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/// specified debug descriptor.
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DIE *&getDieMapSlotFor(DebugInfoDesc *DD) {
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return DescToDieMap[DD];
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}
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};
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//===----------------------------------------------------------------------===//
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// DIEAbbrevData - Dwarf abbreviation data, describes the one attribute of a
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// Dwarf abbreviation.
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class DIEAbbrevData {
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private:
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unsigned Attribute; // Dwarf attribute code.
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unsigned Form; // Dwarf form code.
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public:
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DIEAbbrevData(unsigned A, unsigned F)
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: Attribute(A)
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, Form(F)
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{}
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// Accessors.
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unsigned getAttribute() const { return Attribute; }
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unsigned getForm() const { return Form; }
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/// operator== - Used by DIEAbbrev to locate entry.
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///
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bool operator==(const DIEAbbrevData &DAD) const {
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return Attribute == DAD.Attribute && Form == DAD.Form;
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}
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/// operator!= - Used by DIEAbbrev to locate entry.
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///
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bool operator!=(const DIEAbbrevData &DAD) const {
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return Attribute != DAD.Attribute || Form != DAD.Form;
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}
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/// operator< - Used by DIEAbbrev to locate entry.
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///
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bool operator<(const DIEAbbrevData &DAD) const {
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return Attribute < DAD.Attribute ||
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(Attribute == DAD.Attribute && Form < DAD.Form);
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}
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};
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//===----------------------------------------------------------------------===//
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// DIEAbbrev - Dwarf abbreviation, describes the organization of a debug
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// information object.
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class DIEAbbrev {
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private:
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unsigned Tag; // Dwarf tag code.
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unsigned ChildrenFlag; // Dwarf children flag.
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std::vector<DIEAbbrevData> Data; // Raw data bytes for abbreviation.
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public:
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DIEAbbrev(unsigned T, unsigned C)
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: Tag(T)
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, ChildrenFlag(C)
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, Data()
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{}
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~DIEAbbrev() {}
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// Accessors.
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unsigned getTag() const { return Tag; }
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unsigned getChildrenFlag() const { return ChildrenFlag; }
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const std::vector<DIEAbbrevData> &getData() const { return Data; }
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void setChildrenFlag(unsigned CF) { ChildrenFlag = CF; }
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/// operator== - Used by UniqueVector to locate entry.
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///
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bool operator==(const DIEAbbrev &DA) const;
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/// operator< - Used by UniqueVector to locate entry.
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///
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bool operator<(const DIEAbbrev &DA) const;
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/// AddAttribute - Adds another set of attribute information to the
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/// abbreviation.
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void AddAttribute(unsigned Attribute, unsigned Form) {
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Data.push_back(DIEAbbrevData(Attribute, Form));
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}
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/// AddFirstAttribute - Adds a set of attribute information to the front
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/// of the abbreviation.
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void AddFirstAttribute(unsigned Attribute, unsigned Form) {
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Data.insert(Data.begin(), DIEAbbrevData(Attribute, Form));
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}
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/// Emit - Print the abbreviation using the specified Dwarf writer.
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///
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void Emit(const DwarfWriter &DW) const;
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#ifndef NDEBUG
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void print(std::ostream &O);
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void dump();
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#endif
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};
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//===----------------------------------------------------------------------===//
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// DIEValue - A debug information entry value.
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//
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class DIEValue {
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public:
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enum {
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isInteger,
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isString,
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isLabel,
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isAsIsLabel,
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isDelta,
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isEntry,
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isBlock
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};
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unsigned Type; // Type of the value
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DIEValue(unsigned T) : Type(T) {}
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virtual ~DIEValue() {}
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// Implement isa/cast/dyncast.
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static bool classof(const DIEValue *) { return true; }
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/// EmitValue - Emit value via the Dwarf writer.
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///
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virtual void EmitValue(const DwarfWriter &DW, unsigned Form) const = 0;
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/// SizeOf - Return the size of a value in bytes.
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///
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virtual unsigned SizeOf(const DwarfWriter &DW, unsigned Form) const = 0;
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};
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//===----------------------------------------------------------------------===//
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// DWInteger - An integer value DIE.
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//
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class DIEInteger : public DIEValue {
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private:
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uint64_t Integer;
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public:
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DIEInteger(uint64_t I) : DIEValue(isInteger), Integer(I) {}
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// Implement isa/cast/dyncast.
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static bool classof(const DIEInteger *) { return true; }
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static bool classof(const DIEValue *I) { return I->Type == isInteger; }
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/// BestForm - Choose the best form for integer.
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///
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unsigned BestForm(bool IsSigned);
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/// EmitValue - Emit integer of appropriate size.
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///
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virtual void EmitValue(const DwarfWriter &DW, unsigned Form) const;
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/// SizeOf - Determine size of integer value in bytes.
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///
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virtual unsigned SizeOf(const DwarfWriter &DW, unsigned Form) const;
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};
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//===----------------------------------------------------------------------===//
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// DIEString - A string value DIE.
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//
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struct DIEString : public DIEValue {
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const std::string String;
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DIEString(const std::string &S) : DIEValue(isString), String(S) {}
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// Implement isa/cast/dyncast.
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static bool classof(const DIEString *) { return true; }
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static bool classof(const DIEValue *S) { return S->Type == isString; }
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/// EmitValue - Emit string value.
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///
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virtual void EmitValue(const DwarfWriter &DW, unsigned Form) const;
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/// SizeOf - Determine size of string value in bytes.
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///
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virtual unsigned SizeOf(const DwarfWriter &DW, unsigned Form) const;
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};
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//===----------------------------------------------------------------------===//
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// DIEDwarfLabel - A Dwarf internal label expression DIE.
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//
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struct DIEDwarfLabel : public DIEValue {
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const DWLabel Label;
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DIEDwarfLabel(const DWLabel &L) : DIEValue(isLabel), Label(L) {}
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// Implement isa/cast/dyncast.
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static bool classof(const DIEDwarfLabel *) { return true; }
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static bool classof(const DIEValue *L) { return L->Type == isLabel; }
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/// EmitValue - Emit label value.
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///
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virtual void EmitValue(const DwarfWriter &DW, unsigned Form) const;
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/// SizeOf - Determine size of label value in bytes.
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///
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virtual unsigned SizeOf(const DwarfWriter &DW, unsigned Form) const;
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};
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//===----------------------------------------------------------------------===//
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// DIEObjectLabel - A label to an object in code or data.
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//
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struct DIEObjectLabel : public DIEValue {
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const std::string Label;
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DIEObjectLabel(const std::string &L) : DIEValue(isAsIsLabel), Label(L) {}
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// Implement isa/cast/dyncast.
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static bool classof(const DIEObjectLabel *) { return true; }
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static bool classof(const DIEValue *L) { return L->Type == isAsIsLabel; }
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/// EmitValue - Emit label value.
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///
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virtual void EmitValue(const DwarfWriter &DW, unsigned Form) const;
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/// SizeOf - Determine size of label value in bytes.
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///
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virtual unsigned SizeOf(const DwarfWriter &DW, unsigned Form) const;
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};
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//===----------------------------------------------------------------------===//
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// DIEDelta - A simple label difference DIE.
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//
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struct DIEDelta : public DIEValue {
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const DWLabel LabelHi;
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const DWLabel LabelLo;
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DIEDelta(const DWLabel &Hi, const DWLabel &Lo)
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: DIEValue(isDelta), LabelHi(Hi), LabelLo(Lo) {}
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// Implement isa/cast/dyncast.
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static bool classof(const DIEDelta *) { return true; }
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static bool classof(const DIEValue *D) { return D->Type == isDelta; }
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/// EmitValue - Emit delta value.
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///
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virtual void EmitValue(const DwarfWriter &DW, unsigned Form) const;
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/// SizeOf - Determine size of delta value in bytes.
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///
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virtual unsigned SizeOf(const DwarfWriter &DW, unsigned Form) const;
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};
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//===----------------------------------------------------------------------===//
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// DIEntry - A pointer to a debug information entry.
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//
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struct DIEntry : public DIEValue {
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DIE *Entry;
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DIEntry(DIE *E) : DIEValue(isEntry), Entry(E) {}
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// Implement isa/cast/dyncast.
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static bool classof(const DIEntry *) { return true; }
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static bool classof(const DIEValue *E) { return E->Type == isEntry; }
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/// EmitValue - Emit debug information entry offset.
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///
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virtual void EmitValue(const DwarfWriter &DW, unsigned Form) const;
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/// SizeOf - Determine size of debug information entry in bytes.
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///
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virtual unsigned SizeOf(const DwarfWriter &DW, unsigned Form) const;
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};
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//===----------------------------------------------------------------------===//
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// DIEBlock - A block of values. Primarily used for location expressions.
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//
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struct DIEBlock : public DIEValue {
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unsigned Size; // Size in bytes excluding size header.
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std::vector<unsigned> Forms; // Data forms.
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std::vector<DIEValue *> Values; // Block values.
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DIEBlock()
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: DIEValue(isBlock)
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, Size(0)
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, Forms()
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, Values()
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{}
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~DIEBlock();
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// Implement isa/cast/dyncast.
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static bool classof(const DIEBlock *) { return true; }
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static bool classof(const DIEValue *E) { return E->Type == isBlock; }
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/// ComputeSize - calculate the size of the block.
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///
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unsigned ComputeSize(DwarfWriter &DW);
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/// BestForm - Choose the best form for data.
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///
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unsigned BestForm();
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/// EmitValue - Emit block data.
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///
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virtual void EmitValue(const DwarfWriter &DW, unsigned Form) const;
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/// SizeOf - Determine size of block data in bytes.
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///
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virtual unsigned SizeOf(const DwarfWriter &DW, unsigned Form) const;
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/// AddUInt - Add an unsigned integer value.
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///
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void AddUInt(unsigned Form, uint64_t Integer);
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/// AddSInt - Add an signed integer value.
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///
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void AddSInt(unsigned Form, int64_t Integer);
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/// AddString - Add a std::string value.
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///
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void AddString(unsigned Form, const std::string &String);
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/// AddLabel - Add a Dwarf label value.
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///
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void AddLabel(unsigned Form, const DWLabel &Label);
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/// AddObjectLabel - Add a non-Dwarf label value.
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///
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void AddObjectLabel(unsigned Form, const std::string &Label);
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/// AddDelta - Add a label delta value.
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///
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void AddDelta(unsigned Form, const DWLabel &Hi, const DWLabel &Lo);
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/// AddDIEntry - Add a DIE value.
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///
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void AddDIEntry(unsigned Form, DIE *Entry);
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};
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//===----------------------------------------------------------------------===//
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// DIE - A structured debug information entry. Has an abbreviation which
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// describes it's organization.
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class DIE {
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private:
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DIEAbbrev *Abbrev; // Temporary buffer for abbreviation.
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unsigned AbbrevID; // Decribing abbreviation ID.
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unsigned Offset; // Offset in debug info section.
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unsigned Size; // Size of instance + children.
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std::vector<DIE *> Children; // Children DIEs.
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std::vector<DIEValue *> Values; // Attributes values.
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public:
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DIE(unsigned Tag);
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~DIE();
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// Accessors.
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unsigned getAbbrevID() const { return AbbrevID; }
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unsigned getOffset() const { return Offset; }
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unsigned getSize() const { return Size; }
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const std::vector<DIE *> &getChildren() const { return Children; }
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const std::vector<DIEValue *> &getValues() const { return Values; }
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void setOffset(unsigned O) { Offset = O; }
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void setSize(unsigned S) { Size = S; }
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/// SiblingOffset - Return the offset of the debug information entry's
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/// sibling.
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unsigned SiblingOffset() const { return Offset + Size; }
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/// AddSiblingOffset - Add a sibling offset field to the front of the DIE.
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///
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void AddSiblingOffset();
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/// AddUInt - Add an unsigned integer attribute data and value.
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///
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void AddUInt(unsigned Attribute, unsigned Form, uint64_t Integer);
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/// AddSInt - Add an signed integer attribute data and value.
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///
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void AddSInt(unsigned Attribute, unsigned Form, int64_t Integer);
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/// AddString - Add a std::string attribute data and value.
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///
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void AddString(unsigned Attribute, unsigned Form,
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const std::string &String);
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/// AddLabel - Add a Dwarf label attribute data and value.
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///
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void AddLabel(unsigned Attribute, unsigned Form, const DWLabel &Label);
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/// AddObjectLabel - Add a non-Dwarf label attribute data and value.
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///
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void AddObjectLabel(unsigned Attribute, unsigned Form,
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const std::string &Label);
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/// AddDelta - Add a label delta attribute data and value.
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///
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void AddDelta(unsigned Attribute, unsigned Form,
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const DWLabel &Hi, const DWLabel &Lo);
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/// AddDIEntry - Add a DIE attribute data and value.
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///
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void AddDIEntry(unsigned Attribute, unsigned Form, DIE *Entry);
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/// AddBlock - Add block data.
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///
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void AddBlock(unsigned Attribute, unsigned Form, DIEBlock *Block);
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/// Complete - Indicate that all attributes have been added and
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/// ready to get an abbreviation ID.
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///
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void Complete(DwarfWriter &DW);
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/// AddChild - Add a child to the DIE.
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void AddChild(DIE *Child);
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};
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} // End of namespace llvm
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//===----------------------------------------------------------------------===//
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CompileUnit::~CompileUnit() {
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delete Die;
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}
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/// hasContent - Return true if this compile unit has something to write out.
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///
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bool CompileUnit::hasContent() const {
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return !Die->getChildren().empty();
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}
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/// AddGlobal - Add a new global entity to the compile unit.
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///
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void CompileUnit::AddGlobal(const std::string &Name, DIE *Die) {
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Globals[Name] = Die;
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}
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//===----------------------------------------------------------------------===//
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/// operator== - Used by UniqueVector to locate entry.
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///
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bool DIEAbbrev::operator==(const DIEAbbrev &DA) const {
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if (Tag != DA.Tag) return false;
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if (ChildrenFlag != DA.ChildrenFlag) return false;
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if (Data.size() != DA.Data.size()) return false;
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for (unsigned i = 0, N = Data.size(); i < N; ++i) {
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if (Data[i] != DA.Data[i]) return false;
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}
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return true;
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}
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/// operator< - Used by UniqueVector to locate entry.
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///
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bool DIEAbbrev::operator<(const DIEAbbrev &DA) const {
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if (Tag != DA.Tag) return Tag < DA.Tag;
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if (ChildrenFlag != DA.ChildrenFlag) return ChildrenFlag < DA.ChildrenFlag;
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if (Data.size() != DA.Data.size()) return Data.size() < DA.Data.size();
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for (unsigned i = 0, N = Data.size(); i < N; ++i) {
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|
if (Data[i] != DA.Data[i]) return Data[i] < DA.Data[i];
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/// Emit - Print the abbreviation using the specified Dwarf writer.
|
|
///
|
|
void DIEAbbrev::Emit(const DwarfWriter &DW) const {
|
|
// Emit its Dwarf tag type.
|
|
DW.EmitULEB128Bytes(Tag);
|
|
DW.EOL(TagString(Tag));
|
|
|
|
// Emit whether it has children DIEs.
|
|
DW.EmitULEB128Bytes(ChildrenFlag);
|
|
DW.EOL(ChildrenString(ChildrenFlag));
|
|
|
|
// For each attribute description.
|
|
for (unsigned i = 0, N = Data.size(); i < N; ++i) {
|
|
const DIEAbbrevData &AttrData = Data[i];
|
|
|
|
// Emit attribute type.
|
|
DW.EmitULEB128Bytes(AttrData.getAttribute());
|
|
DW.EOL(AttributeString(AttrData.getAttribute()));
|
|
|
|
// Emit form type.
|
|
DW.EmitULEB128Bytes(AttrData.getForm());
|
|
DW.EOL(FormEncodingString(AttrData.getForm()));
|
|
}
|
|
|
|
// Mark end of abbreviation.
|
|
DW.EmitULEB128Bytes(0); DW.EOL("EOM(1)");
|
|
DW.EmitULEB128Bytes(0); DW.EOL("EOM(2)");
|
|
}
|
|
|
|
#ifndef NDEBUG
|
|
void DIEAbbrev::print(std::ostream &O) {
|
|
O << "Abbreviation @"
|
|
<< std::hex << (intptr_t)this << std::dec
|
|
<< " "
|
|
<< TagString(Tag)
|
|
<< " "
|
|
<< ChildrenString(ChildrenFlag)
|
|
<< "\n";
|
|
|
|
for (unsigned i = 0, N = Data.size(); i < N; ++i) {
|
|
O << " "
|
|
<< AttributeString(Data[i].getAttribute())
|
|
<< " "
|
|
<< FormEncodingString(Data[i].getForm())
|
|
<< "\n";
|
|
}
|
|
}
|
|
void DIEAbbrev::dump() { print(std::cerr); }
|
|
#endif
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
/// BestForm - Choose the best form for integer.
|
|
///
|
|
unsigned DIEInteger::BestForm(bool IsSigned) {
|
|
if (IsSigned) {
|
|
if ((char)Integer == (signed)Integer) return DW_FORM_data1;
|
|
if ((short)Integer == (signed)Integer) return DW_FORM_data2;
|
|
if ((int)Integer == (signed)Integer) return DW_FORM_data4;
|
|
} else {
|
|
if ((unsigned char)Integer == Integer) return DW_FORM_data1;
|
|
if ((unsigned short)Integer == Integer) return DW_FORM_data2;
|
|
if ((unsigned int)Integer == Integer) return DW_FORM_data4;
|
|
}
|
|
return DW_FORM_data8;
|
|
}
|
|
|
|
/// EmitValue - Emit integer of appropriate size.
|
|
///
|
|
void DIEInteger::EmitValue(const DwarfWriter &DW, unsigned Form) const {
|
|
switch (Form) {
|
|
case DW_FORM_flag: // Fall thru
|
|
case DW_FORM_ref1: // Fall thru
|
|
case DW_FORM_data1: DW.EmitInt8(Integer); break;
|
|
case DW_FORM_ref2: // Fall thru
|
|
case DW_FORM_data2: DW.EmitInt16(Integer); break;
|
|
case DW_FORM_ref4: // Fall thru
|
|
case DW_FORM_data4: DW.EmitInt32(Integer); break;
|
|
case DW_FORM_ref8: // Fall thru
|
|
case DW_FORM_data8: DW.EmitInt64(Integer); break;
|
|
case DW_FORM_udata: DW.EmitULEB128Bytes(Integer); break;
|
|
case DW_FORM_sdata: DW.EmitSLEB128Bytes(Integer); break;
|
|
default: assert(0 && "DIE Value form not supported yet"); break;
|
|
}
|
|
}
|
|
|
|
/// SizeOf - Determine size of integer value in bytes.
|
|
///
|
|
unsigned DIEInteger::SizeOf(const DwarfWriter &DW, unsigned Form) const {
|
|
switch (Form) {
|
|
case DW_FORM_flag: // Fall thru
|
|
case DW_FORM_ref1: // Fall thru
|
|
case DW_FORM_data1: return sizeof(int8_t);
|
|
case DW_FORM_ref2: // Fall thru
|
|
case DW_FORM_data2: return sizeof(int16_t);
|
|
case DW_FORM_ref4: // Fall thru
|
|
case DW_FORM_data4: return sizeof(int32_t);
|
|
case DW_FORM_ref8: // Fall thru
|
|
case DW_FORM_data8: return sizeof(int64_t);
|
|
case DW_FORM_udata: return DW.SizeULEB128(Integer);
|
|
case DW_FORM_sdata: return DW.SizeSLEB128(Integer);
|
|
default: assert(0 && "DIE Value form not supported yet"); break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
/// EmitValue - Emit string value.
|
|
///
|
|
void DIEString::EmitValue(const DwarfWriter &DW, unsigned Form) const {
|
|
DW.EmitString(String);
|
|
}
|
|
|
|
/// SizeOf - Determine size of string value in bytes.
|
|
///
|
|
unsigned DIEString::SizeOf(const DwarfWriter &DW, unsigned Form) const {
|
|
return String.size() + sizeof(char); // sizeof('\0');
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
/// EmitValue - Emit label value.
|
|
///
|
|
void DIEDwarfLabel::EmitValue(const DwarfWriter &DW, unsigned Form) const {
|
|
DW.EmitReference(Label);
|
|
}
|
|
|
|
/// SizeOf - Determine size of label value in bytes.
|
|
///
|
|
unsigned DIEDwarfLabel::SizeOf(const DwarfWriter &DW, unsigned Form) const {
|
|
return DW.getTargetAsmInfo()->getAddressSize();
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
/// EmitValue - Emit label value.
|
|
///
|
|
void DIEObjectLabel::EmitValue(const DwarfWriter &DW, unsigned Form) const {
|
|
DW.EmitReference(Label);
|
|
}
|
|
|
|
/// SizeOf - Determine size of label value in bytes.
|
|
///
|
|
unsigned DIEObjectLabel::SizeOf(const DwarfWriter &DW, unsigned Form) const {
|
|
return DW.getTargetAsmInfo()->getAddressSize();
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
/// EmitValue - Emit delta value.
|
|
///
|
|
void DIEDelta::EmitValue(const DwarfWriter &DW, unsigned Form) const {
|
|
DW.EmitDifference(LabelHi, LabelLo);
|
|
}
|
|
|
|
/// SizeOf - Determine size of delta value in bytes.
|
|
///
|
|
unsigned DIEDelta::SizeOf(const DwarfWriter &DW, unsigned Form) const {
|
|
return DW.getTargetAsmInfo()->getAddressSize();
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
/// EmitValue - Emit debug information entry offset.
|
|
///
|
|
void DIEntry::EmitValue(const DwarfWriter &DW, unsigned Form) const {
|
|
DW.EmitInt32(Entry->getOffset());
|
|
}
|
|
|
|
/// SizeOf - Determine size of debug information entry value in bytes.
|
|
///
|
|
unsigned DIEntry::SizeOf(const DwarfWriter &DW, unsigned Form) const {
|
|
return sizeof(int32_t);
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
DIEBlock::~DIEBlock() {
|
|
for (unsigned i = 0, N = Values.size(); i < N; ++i) {
|
|
delete Values[i];
|
|
}
|
|
}
|
|
|
|
/// ComputeSize - calculate the size of the block.
|
|
///
|
|
unsigned DIEBlock::ComputeSize(DwarfWriter &DW) {
|
|
Size = 0;
|
|
for (unsigned i = 0, N = Values.size(); i < N; ++i) {
|
|
Size += Values[i]->SizeOf(DW, Forms[i]);
|
|
}
|
|
return Size;
|
|
}
|
|
|
|
/// BestForm - Choose the best form for data.
|
|
///
|
|
unsigned DIEBlock::BestForm() {
|
|
if ((unsigned char)Size == Size) return DW_FORM_block1;
|
|
if ((unsigned short)Size == Size) return DW_FORM_block2;
|
|
if ((unsigned int)Size == Size) return DW_FORM_block4;
|
|
return DW_FORM_block;
|
|
}
|
|
|
|
/// EmitValue - Emit block data.
|
|
///
|
|
void DIEBlock::EmitValue(const DwarfWriter &DW, unsigned Form) const {
|
|
switch (Form) {
|
|
case DW_FORM_block1: DW.EmitInt8(Size); break;
|
|
case DW_FORM_block2: DW.EmitInt16(Size); break;
|
|
case DW_FORM_block4: DW.EmitInt32(Size); break;
|
|
case DW_FORM_block: DW.EmitULEB128Bytes(Size); break;
|
|
default: assert(0 && "Improper form for block"); break;
|
|
}
|
|
for (unsigned i = 0, N = Values.size(); i < N; ++i) {
|
|
DW.EOL("");
|
|
Values[i]->EmitValue(DW, Forms[i]);
|
|
}
|
|
}
|
|
|
|
/// SizeOf - Determine size of block data in bytes.
|
|
///
|
|
unsigned DIEBlock::SizeOf(const DwarfWriter &DW, unsigned Form) const {
|
|
switch (Form) {
|
|
case DW_FORM_block1: return Size + sizeof(int8_t);
|
|
case DW_FORM_block2: return Size + sizeof(int16_t);
|
|
case DW_FORM_block4: return Size + sizeof(int32_t);
|
|
case DW_FORM_block: return Size + DW.SizeULEB128(Size);
|
|
default: assert(0 && "Improper form for block"); break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/// AddUInt - Add an unsigned integer value.
|
|
///
|
|
void DIEBlock::AddUInt(unsigned Form, uint64_t Integer) {
|
|
DIEInteger *DI = new DIEInteger(Integer);
|
|
Values.push_back(DI);
|
|
if (Form == 0) Form = DI->BestForm(false);
|
|
Forms.push_back(Form);
|
|
}
|
|
|
|
/// AddSInt - Add an signed integer value.
|
|
///
|
|
void DIEBlock::AddSInt(unsigned Form, int64_t Integer) {
|
|
DIEInteger *DI = new DIEInteger(Integer);
|
|
Values.push_back(DI);
|
|
if (Form == 0) Form = DI->BestForm(true);
|
|
Forms.push_back(Form);
|
|
}
|
|
|
|
/// AddString - Add a std::string value.
|
|
///
|
|
void DIEBlock::AddString(unsigned Form, const std::string &String) {
|
|
Values.push_back(new DIEString(String));
|
|
Forms.push_back(Form);
|
|
}
|
|
|
|
/// AddLabel - Add a Dwarf label value.
|
|
///
|
|
void DIEBlock::AddLabel(unsigned Form, const DWLabel &Label) {
|
|
Values.push_back(new DIEDwarfLabel(Label));
|
|
Forms.push_back(Form);
|
|
}
|
|
|
|
/// AddObjectLabel - Add a non-Dwarf label value.
|
|
///
|
|
void DIEBlock::AddObjectLabel(unsigned Form, const std::string &Label) {
|
|
Values.push_back(new DIEObjectLabel(Label));
|
|
Forms.push_back(Form);
|
|
}
|
|
|
|
/// AddDelta - Add a label delta value.
|
|
///
|
|
void DIEBlock::AddDelta(unsigned Form, const DWLabel &Hi, const DWLabel &Lo) {
|
|
Values.push_back(new DIEDelta(Hi, Lo));
|
|
Forms.push_back(Form);
|
|
}
|
|
|
|
/// AddDIEntry - Add a DIE value.
|
|
///
|
|
void DIEBlock::AddDIEntry(unsigned Form, DIE *Entry) {
|
|
Values.push_back(new DIEntry(Entry));
|
|
Forms.push_back(Form);
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
DIE::DIE(unsigned Tag)
|
|
: Abbrev(new DIEAbbrev(Tag, DW_CHILDREN_no))
|
|
, AbbrevID(0)
|
|
, Offset(0)
|
|
, Size(0)
|
|
, Children()
|
|
, Values()
|
|
{}
|
|
|
|
DIE::~DIE() {
|
|
if (Abbrev) delete Abbrev;
|
|
|
|
for (unsigned i = 0, N = Children.size(); i < N; ++i) {
|
|
delete Children[i];
|
|
}
|
|
|
|
for (unsigned j = 0, M = Values.size(); j < M; ++j) {
|
|
delete Values[j];
|
|
}
|
|
}
|
|
|
|
/// AddSiblingOffset - Add a sibling offset field to the front of the DIE.
|
|
///
|
|
void DIE::AddSiblingOffset() {
|
|
DIEInteger *DI = new DIEInteger(0);
|
|
Values.insert(Values.begin(), DI);
|
|
Abbrev->AddFirstAttribute(DW_AT_sibling, DW_FORM_ref4);
|
|
}
|
|
|
|
/// AddUInt - Add an unsigned integer attribute data and value.
|
|
///
|
|
void DIE::AddUInt(unsigned Attribute, unsigned Form, uint64_t Integer) {
|
|
DIEInteger *DI = new DIEInteger(Integer);
|
|
Values.push_back(DI);
|
|
if (!Form) Form = DI->BestForm(false);
|
|
Abbrev->AddAttribute(Attribute, Form);
|
|
}
|
|
|
|
/// AddSInt - Add an signed integer attribute data and value.
|
|
///
|
|
void DIE::AddSInt(unsigned Attribute, unsigned Form, int64_t Integer) {
|
|
DIEInteger *DI = new DIEInteger(Integer);
|
|
Values.push_back(DI);
|
|
if (!Form) Form = DI->BestForm(true);
|
|
Abbrev->AddAttribute(Attribute, Form);
|
|
}
|
|
|
|
/// AddString - Add a std::string attribute data and value.
|
|
///
|
|
void DIE::AddString(unsigned Attribute, unsigned Form,
|
|
const std::string &String) {
|
|
Values.push_back(new DIEString(String));
|
|
Abbrev->AddAttribute(Attribute, Form);
|
|
}
|
|
|
|
/// AddLabel - Add a Dwarf label attribute data and value.
|
|
///
|
|
void DIE::AddLabel(unsigned Attribute, unsigned Form,
|
|
const DWLabel &Label) {
|
|
Values.push_back(new DIEDwarfLabel(Label));
|
|
Abbrev->AddAttribute(Attribute, Form);
|
|
}
|
|
|
|
/// AddObjectLabel - Add an non-Dwarf label attribute data and value.
|
|
///
|
|
void DIE::AddObjectLabel(unsigned Attribute, unsigned Form,
|
|
const std::string &Label) {
|
|
Values.push_back(new DIEObjectLabel(Label));
|
|
Abbrev->AddAttribute(Attribute, Form);
|
|
}
|
|
|
|
/// AddDelta - Add a label delta attribute data and value.
|
|
///
|
|
void DIE::AddDelta(unsigned Attribute, unsigned Form,
|
|
const DWLabel &Hi, const DWLabel &Lo) {
|
|
Values.push_back(new DIEDelta(Hi, Lo));
|
|
Abbrev->AddAttribute(Attribute, Form);
|
|
}
|
|
|
|
/// AddDIEntry - Add a DIE attribute data and value.
|
|
///
|
|
void DIE::AddDIEntry(unsigned Attribute, unsigned Form, DIE *Entry) {
|
|
Values.push_back(new DIEntry(Entry));
|
|
Abbrev->AddAttribute(Attribute, Form);
|
|
}
|
|
|
|
/// AddBlock - Add block data.
|
|
///
|
|
void DIE::AddBlock(unsigned Attribute, unsigned Form, DIEBlock *Block) {
|
|
assert(Block->Size && "Block size has not been computed");
|
|
Values.push_back(Block);
|
|
if (!Form) Form = Block->BestForm();
|
|
Abbrev->AddAttribute(Attribute, Form);
|
|
}
|
|
|
|
/// Complete - Indicate that all attributes have been added and ready to get an
|
|
/// abbreviation ID.
|
|
void DIE::Complete(DwarfWriter &DW) {
|
|
AbbrevID = DW.NewAbbreviation(Abbrev);
|
|
delete Abbrev;
|
|
Abbrev = NULL;
|
|
}
|
|
|
|
/// AddChild - Add a child to the DIE.
|
|
///
|
|
void DIE::AddChild(DIE *Child) {
|
|
assert(Abbrev && "Adding children without an abbreviation");
|
|
Abbrev->setChildrenFlag(DW_CHILDREN_yes);
|
|
Children.push_back(Child);
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
/// DwarfWriter
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
/// PrintHex - Print a value as a hexidecimal value.
|
|
///
|
|
void DwarfWriter::PrintHex(int Value) const {
|
|
O << "0x" << std::hex << Value << std::dec;
|
|
}
|
|
|
|
/// EOL - Print a newline character to asm stream. If a comment is present
|
|
/// then it will be printed first. Comments should not contain '\n'.
|
|
void DwarfWriter::EOL(const std::string &Comment) const {
|
|
if (DwarfVerbose && !Comment.empty()) {
|
|
O << "\t"
|
|
<< TAI->getCommentString()
|
|
<< " "
|
|
<< Comment;
|
|
}
|
|
O << "\n";
|
|
}
|
|
|
|
/// EmitAlign - Print a align directive.
|
|
///
|
|
void DwarfWriter::EmitAlign(unsigned Alignment) const {
|
|
O << TAI->getAlignDirective() << Alignment << "\n";
|
|
}
|
|
|
|
/// EmitULEB128Bytes - Emit an assembler byte data directive to compose an
|
|
/// unsigned leb128 value.
|
|
void DwarfWriter::EmitULEB128Bytes(unsigned Value) const {
|
|
if (TAI->hasLEB128()) {
|
|
O << "\t.uleb128\t"
|
|
<< Value;
|
|
} else {
|
|
O << TAI->getData8bitsDirective();
|
|
PrintULEB128(Value);
|
|
}
|
|
}
|
|
|
|
/// EmitSLEB128Bytes - Emit an assembler byte data directive to compose a
|
|
/// signed leb128 value.
|
|
void DwarfWriter::EmitSLEB128Bytes(int Value) const {
|
|
if (TAI->hasLEB128()) {
|
|
O << "\t.sleb128\t"
|
|
<< Value;
|
|
} else {
|
|
O << TAI->getData8bitsDirective();
|
|
PrintSLEB128(Value);
|
|
}
|
|
}
|
|
|
|
/// PrintULEB128 - Print a series of hexidecimal values (separated by commas)
|
|
/// representing an unsigned leb128 value.
|
|
void DwarfWriter::PrintULEB128(unsigned Value) const {
|
|
do {
|
|
unsigned Byte = Value & 0x7f;
|
|
Value >>= 7;
|
|
if (Value) Byte |= 0x80;
|
|
PrintHex(Byte);
|
|
if (Value) O << ", ";
|
|
} while (Value);
|
|
}
|
|
|
|
/// SizeULEB128 - Compute the number of bytes required for an unsigned leb128
|
|
/// value.
|
|
unsigned DwarfWriter::SizeULEB128(unsigned Value) {
|
|
unsigned Size = 0;
|
|
do {
|
|
Value >>= 7;
|
|
Size += sizeof(int8_t);
|
|
} while (Value);
|
|
return Size;
|
|
}
|
|
|
|
/// PrintSLEB128 - Print a series of hexidecimal values (separated by commas)
|
|
/// representing a signed leb128 value.
|
|
void DwarfWriter::PrintSLEB128(int Value) const {
|
|
int Sign = Value >> (8 * sizeof(Value) - 1);
|
|
bool IsMore;
|
|
|
|
do {
|
|
unsigned Byte = Value & 0x7f;
|
|
Value >>= 7;
|
|
IsMore = Value != Sign || ((Byte ^ Sign) & 0x40) != 0;
|
|
if (IsMore) Byte |= 0x80;
|
|
PrintHex(Byte);
|
|
if (IsMore) O << ", ";
|
|
} while (IsMore);
|
|
}
|
|
|
|
/// SizeSLEB128 - Compute the number of bytes required for a signed leb128
|
|
/// value.
|
|
unsigned DwarfWriter::SizeSLEB128(int Value) {
|
|
unsigned Size = 0;
|
|
int Sign = Value >> (8 * sizeof(Value) - 1);
|
|
bool IsMore;
|
|
|
|
do {
|
|
unsigned Byte = Value & 0x7f;
|
|
Value >>= 7;
|
|
IsMore = Value != Sign || ((Byte ^ Sign) & 0x40) != 0;
|
|
Size += sizeof(int8_t);
|
|
} while (IsMore);
|
|
return Size;
|
|
}
|
|
|
|
/// EmitInt8 - Emit a byte directive and value.
|
|
///
|
|
void DwarfWriter::EmitInt8(int Value) const {
|
|
O << TAI->getData8bitsDirective();
|
|
PrintHex(Value & 0xFF);
|
|
}
|
|
|
|
/// EmitInt16 - Emit a short directive and value.
|
|
///
|
|
void DwarfWriter::EmitInt16(int Value) const {
|
|
O << TAI->getData16bitsDirective();
|
|
PrintHex(Value & 0xFFFF);
|
|
}
|
|
|
|
/// EmitInt32 - Emit a long directive and value.
|
|
///
|
|
void DwarfWriter::EmitInt32(int Value) const {
|
|
O << TAI->getData32bitsDirective();
|
|
PrintHex(Value);
|
|
}
|
|
|
|
/// EmitInt64 - Emit a long long directive and value.
|
|
///
|
|
void DwarfWriter::EmitInt64(uint64_t Value) const {
|
|
if (TAI->getData64bitsDirective()) {
|
|
O << TAI->getData64bitsDirective() << "0x" << std::hex << Value << std::dec;
|
|
} else {
|
|
if (TD->isBigEndian()) {
|
|
EmitInt32(unsigned(Value >> 32)); O << "\n";
|
|
EmitInt32(unsigned(Value));
|
|
} else {
|
|
EmitInt32(unsigned(Value)); O << "\n";
|
|
EmitInt32(unsigned(Value >> 32));
|
|
}
|
|
}
|
|
}
|
|
|
|
/// EmitString - Emit a string with quotes and a null terminator.
|
|
/// Special characters are emitted properly. (Eg. '\t')
|
|
void DwarfWriter::EmitString(const std::string &String) const {
|
|
O << TAI->getAsciiDirective()
|
|
<< "\"";
|
|
for (unsigned i = 0, N = String.size(); i < N; ++i) {
|
|
unsigned char C = String[i];
|
|
|
|
if (!isascii(C) || iscntrl(C)) {
|
|
switch(C) {
|
|
case '\b': O << "\\b"; break;
|
|
case '\f': O << "\\f"; break;
|
|
case '\n': O << "\\n"; break;
|
|
case '\r': O << "\\r"; break;
|
|
case '\t': O << "\\t"; break;
|
|
default:
|
|
O << '\\';
|
|
O << char('0' + ((C >> 6) & 7));
|
|
O << char('0' + ((C >> 3) & 7));
|
|
O << char('0' + ((C >> 0) & 7));
|
|
break;
|
|
}
|
|
} else if (C == '\"') {
|
|
O << "\\\"";
|
|
} else if (C == '\'') {
|
|
O << "\\\'";
|
|
} else {
|
|
O << C;
|
|
}
|
|
}
|
|
O << "\\0\"";
|
|
}
|
|
|
|
/// PrintLabelName - Print label name in form used by Dwarf writer.
|
|
///
|
|
void DwarfWriter::PrintLabelName(const char *Tag, unsigned Number) const {
|
|
O << TAI->getPrivateGlobalPrefix()
|
|
<< "debug_"
|
|
<< Tag;
|
|
if (Number) O << Number;
|
|
}
|
|
|
|
/// EmitLabel - Emit location label for internal use by Dwarf.
|
|
///
|
|
void DwarfWriter::EmitLabel(const char *Tag, unsigned Number) const {
|
|
PrintLabelName(Tag, Number);
|
|
O << ":\n";
|
|
}
|
|
|
|
/// EmitReference - Emit a reference to a label.
|
|
///
|
|
void DwarfWriter::EmitReference(const char *Tag, unsigned Number) const {
|
|
if (TAI->getAddressSize() == 4)
|
|
O << TAI->getData32bitsDirective();
|
|
else
|
|
O << TAI->getData64bitsDirective();
|
|
|
|
PrintLabelName(Tag, Number);
|
|
}
|
|
void DwarfWriter::EmitReference(const std::string &Name) const {
|
|
if (TAI->getAddressSize() == 4)
|
|
O << TAI->getData32bitsDirective();
|
|
else
|
|
O << TAI->getData64bitsDirective();
|
|
|
|
O << Name;
|
|
}
|
|
|
|
/// EmitDifference - Emit an label difference as sizeof(pointer) value. Some
|
|
/// assemblers do not accept absolute expressions with data directives, so there
|
|
/// is an option (needsSet) to use an intermediary 'set' expression.
|
|
void DwarfWriter::EmitDifference(const char *TagHi, unsigned NumberHi,
|
|
const char *TagLo, unsigned NumberLo) const {
|
|
if (TAI->needsSet()) {
|
|
static unsigned SetCounter = 0;
|
|
|
|
O << "\t.set\t";
|
|
PrintLabelName("set", SetCounter);
|
|
O << ",";
|
|
PrintLabelName(TagHi, NumberHi);
|
|
O << "-";
|
|
PrintLabelName(TagLo, NumberLo);
|
|
O << "\n";
|
|
|
|
if (TAI->getAddressSize() == sizeof(int32_t))
|
|
O << TAI->getData32bitsDirective();
|
|
else
|
|
O << TAI->getData64bitsDirective();
|
|
|
|
PrintLabelName("set", SetCounter);
|
|
|
|
++SetCounter;
|
|
} else {
|
|
if (TAI->getAddressSize() == sizeof(int32_t))
|
|
O << TAI->getData32bitsDirective();
|
|
else
|
|
O << TAI->getData64bitsDirective();
|
|
|
|
PrintLabelName(TagHi, NumberHi);
|
|
O << "-";
|
|
PrintLabelName(TagLo, NumberLo);
|
|
}
|
|
}
|
|
|
|
/// NewAbbreviation - Add the abbreviation to the Abbreviation vector.
|
|
///
|
|
unsigned DwarfWriter::NewAbbreviation(DIEAbbrev *Abbrev) {
|
|
return Abbreviations.insert(*Abbrev);
|
|
}
|
|
|
|
/// NewString - Add a string to the constant pool and returns a label.
|
|
///
|
|
DWLabel DwarfWriter::NewString(const std::string &String) {
|
|
unsigned StringID = StringPool.insert(String);
|
|
return DWLabel("string", StringID);
|
|
}
|
|
|
|
/// AddSourceLine - Add location information to specified debug information
|
|
/// entry.
|
|
void DwarfWriter::AddSourceLine(DIE *Die, CompileUnitDesc *File, unsigned Line){
|
|
if (File && Line) {
|
|
CompileUnit *FileUnit = FindCompileUnit(File);
|
|
unsigned FileID = FileUnit->getID();
|
|
Die->AddUInt(DW_AT_decl_file, 0, FileID);
|
|
Die->AddUInt(DW_AT_decl_line, 0, Line);
|
|
}
|
|
}
|
|
|
|
/// AddAddress - Add an address attribute to a die based on the location
|
|
/// provided.
|
|
void DwarfWriter::AddAddress(DIE *Die, unsigned Attribute,
|
|
const MachineLocation &Location) {
|
|
DIEBlock *Block = new DIEBlock();
|
|
unsigned Reg = RI->getDwarfRegNum(Location.getRegister());
|
|
|
|
if (Location.isRegister()) {
|
|
if (Reg < 32) {
|
|
Block->AddUInt(DW_FORM_data1, DW_OP_reg0 + Reg);
|
|
} else {
|
|
Block->AddUInt(DW_FORM_data1, DW_OP_regx);
|
|
Block->AddUInt(DW_FORM_udata, Reg);
|
|
}
|
|
} else {
|
|
if (Reg < 32) {
|
|
Block->AddUInt(DW_FORM_data1, DW_OP_breg0 + Reg);
|
|
} else {
|
|
Block->AddUInt(DW_FORM_data1, DW_OP_bregx);
|
|
Block->AddUInt(DW_FORM_udata, Reg);
|
|
}
|
|
Block->AddUInt(DW_FORM_sdata, Location.getOffset());
|
|
}
|
|
Block->ComputeSize(*this);
|
|
Die->AddBlock(Attribute, 0, Block);
|
|
}
|
|
|
|
/// getDieMapSlotFor - Returns the debug information entry map slot for the
|
|
/// specified debug descriptor.
|
|
DIE *&DwarfWriter::getDieMapSlotFor(DebugInfoDesc *DD) {
|
|
return DescToDieMap[DD];
|
|
}
|
|
|
|
/// NewType - Create a new type DIE.
|
|
///
|
|
DIE *DwarfWriter::NewType(DIE *Context, TypeDesc *TyDesc, CompileUnit *Unit) {
|
|
if (!TyDesc) {
|
|
// FIXME - Hack for missing types
|
|
DIE *Die = new DIE(DW_TAG_base_type);
|
|
Die->AddUInt(DW_AT_byte_size, 0, 4);
|
|
Die->AddUInt(DW_AT_encoding, DW_FORM_data1, DW_ATE_signed);
|
|
Unit->getDie()->AddChild(Die);
|
|
return Die;
|
|
}
|
|
|
|
// Check for pre-existence.
|
|
DIE *&Slot = Unit->getDieMapSlotFor(TyDesc);
|
|
if (Slot) return Slot;
|
|
|
|
// Type DIE result.
|
|
DIE *Ty = NULL;
|
|
|
|
// FIXME - Not sure why programs and variables are coming through here.
|
|
// Short cut for handling subprogram types (not really a TyDesc.)
|
|
if (SubprogramDesc *SubprogramTy = dyn_cast<SubprogramDesc>(TyDesc)) {
|
|
Slot = Ty = new DIE(DW_TAG_pointer_type);
|
|
Ty->AddUInt(DW_AT_byte_size, 0, TAI->getAddressSize());
|
|
Ty->AddString(DW_AT_name, DW_FORM_string, SubprogramTy->getName());
|
|
Context->AddChild(Ty);
|
|
return Slot;
|
|
}
|
|
// Short cut for handling global variable types (not really a TyDesc.)
|
|
if (GlobalVariableDesc *GlobalVariableTy =
|
|
dyn_cast<GlobalVariableDesc>(TyDesc)) {
|
|
Slot = Ty = new DIE(DW_TAG_pointer_type);
|
|
Ty->AddUInt(DW_AT_byte_size, 0, TAI->getAddressSize());
|
|
Ty->AddString(DW_AT_name, DW_FORM_string, GlobalVariableTy->getName());
|
|
Context->AddChild(Ty);
|
|
return Slot;
|
|
}
|
|
|
|
// Get core information.
|
|
const std::string &Name = TyDesc->getName();
|
|
uint64_t Size = TyDesc->getSize() >> 3;
|
|
|
|
if (BasicTypeDesc *BasicTy = dyn_cast<BasicTypeDesc>(TyDesc)) {
|
|
// Fundamental types like int, float, bool
|
|
Slot = Ty = new DIE(DW_TAG_base_type);
|
|
unsigned Encoding = BasicTy->getEncoding();
|
|
Ty->AddUInt(DW_AT_encoding, DW_FORM_data1, Encoding);
|
|
} else if (DerivedTypeDesc *DerivedTy = dyn_cast<DerivedTypeDesc>(TyDesc)) {
|
|
// Create specific DIE.
|
|
Slot = Ty = new DIE(DerivedTy->getTag());
|
|
|
|
// Map to main type, void will not have a type.
|
|
if (TypeDesc *FromTy = DerivedTy->getFromType()) {
|
|
Ty->AddDIEntry(DW_AT_type, DW_FORM_ref4,
|
|
NewType(Context, FromTy, Unit));
|
|
}
|
|
} else if (CompositeTypeDesc *CompTy = dyn_cast<CompositeTypeDesc>(TyDesc)) {
|
|
// Fetch tag
|
|
unsigned Tag = CompTy->getTag();
|
|
|
|
// Create specific DIE.
|
|
Slot = Ty = Tag == DW_TAG_vector_type ? new DIE(DW_TAG_array_type) :
|
|
new DIE(Tag);
|
|
|
|
std::vector<DebugInfoDesc *> &Elements = CompTy->getElements();
|
|
|
|
switch (Tag) {
|
|
case DW_TAG_vector_type: Ty->AddUInt(DW_AT_GNU_vector, DW_FORM_flag, 1);
|
|
// Fall thru
|
|
case DW_TAG_array_type: {
|
|
// Add element type.
|
|
if (TypeDesc *FromTy = CompTy->getFromType()) {
|
|
Ty->AddDIEntry(DW_AT_type, DW_FORM_ref4,
|
|
NewType(Context, FromTy, Unit));
|
|
}
|
|
|
|
// Don't emit size attribute.
|
|
Size = 0;
|
|
|
|
// Construct an anonymous type for index type.
|
|
DIE *IndexTy = new DIE(DW_TAG_base_type);
|
|
IndexTy->AddUInt(DW_AT_byte_size, 0, 4);
|
|
IndexTy->AddUInt(DW_AT_encoding, DW_FORM_data1, DW_ATE_signed);
|
|
// Add to context.
|
|
Context->AddChild(IndexTy);
|
|
|
|
// Add subranges to array type.
|
|
for(unsigned i = 0, N = Elements.size(); i < N; ++i) {
|
|
SubrangeDesc *SRD = cast<SubrangeDesc>(Elements[i]);
|
|
int64_t Lo = SRD->getLo();
|
|
int64_t Hi = SRD->getHi();
|
|
DIE *Subrange = new DIE(DW_TAG_subrange_type);
|
|
|
|
// If a range is available.
|
|
if (Lo != Hi) {
|
|
Subrange->AddDIEntry(DW_AT_type, DW_FORM_ref4, IndexTy);
|
|
// Only add low if non-zero.
|
|
if (Lo) Subrange->AddSInt(DW_AT_lower_bound, 0, Lo);
|
|
Subrange->AddSInt(DW_AT_upper_bound, 0, Hi);
|
|
}
|
|
Ty->AddChild(Subrange);
|
|
}
|
|
|
|
break;
|
|
}
|
|
case DW_TAG_structure_type:
|
|
case DW_TAG_union_type: {
|
|
// Add elements to structure type.
|
|
for(unsigned i = 0, N = Elements.size(); i < N; ++i) {
|
|
DebugInfoDesc *Element = Elements[i];
|
|
|
|
if (DerivedTypeDesc *MemberDesc = dyn_cast<DerivedTypeDesc>(Element)) {
|
|
// Add field or base class.
|
|
|
|
unsigned Tag = MemberDesc->getTag();
|
|
|
|
// Extract the basic information.
|
|
const std::string &Name = MemberDesc->getName();
|
|
TypeDesc *MemTy = MemberDesc->getFromType();
|
|
uint64_t Size = MemberDesc->getSize();
|
|
uint64_t Align = MemberDesc->getAlign();
|
|
uint64_t Offset = MemberDesc->getOffset();
|
|
|
|
// Construct member debug information entry.
|
|
DIE *Member = new DIE(Tag);
|
|
|
|
// Add name if not "".
|
|
if (!Name.empty())Member->AddString(DW_AT_name, DW_FORM_string, Name);
|
|
// Add location if available.
|
|
AddSourceLine(Member, MemberDesc->getFile(), MemberDesc->getLine());
|
|
|
|
// Most of the time the field info is the same as the members.
|
|
uint64_t FieldSize = Size;
|
|
uint64_t FieldAlign = Align;
|
|
uint64_t FieldOffset = Offset;
|
|
|
|
if (TypeDesc *FromTy = MemberDesc->getFromType()) {
|
|
Member->AddDIEntry(DW_AT_type, DW_FORM_ref4,
|
|
NewType(Context, FromTy, Unit));
|
|
FieldSize = FromTy->getSize();
|
|
FieldAlign = FromTy->getSize();
|
|
}
|
|
|
|
// Unless we have a bit field.
|
|
if (Tag == DW_TAG_member && FieldSize != Size) {
|
|
// Construct the alignment mask.
|
|
uint64_t AlignMask = ~(FieldAlign - 1);
|
|
// Determine the high bit + 1 of the declared size.
|
|
uint64_t HiMark = (Offset + FieldSize) & AlignMask;
|
|
// Work backwards to determine the base offset of the field.
|
|
FieldOffset = HiMark - FieldSize;
|
|
// Now normalize offset to the field.
|
|
Offset -= FieldOffset;
|
|
|
|
// Maybe we need to work from the other end.
|
|
if (TD->isLittleEndian()) Offset = FieldSize - (Offset + Size);
|
|
|
|
// Add size and offset.
|
|
Member->AddUInt(DW_AT_byte_size, 0, FieldSize >> 3);
|
|
Member->AddUInt(DW_AT_bit_size, 0, Size);
|
|
Member->AddUInt(DW_AT_bit_offset, 0, Offset);
|
|
}
|
|
|
|
// Add computation for offset.
|
|
DIEBlock *Block = new DIEBlock();
|
|
Block->AddUInt(DW_FORM_data1, DW_OP_plus_uconst);
|
|
Block->AddUInt(DW_FORM_udata, FieldOffset >> 3);
|
|
Block->ComputeSize(*this);
|
|
Member->AddBlock(DW_AT_data_member_location, 0, Block);
|
|
|
|
// Add accessibility (public default unless is base class.
|
|
if (MemberDesc->isProtected()) {
|
|
Member->AddUInt(DW_AT_accessibility, 0, DW_ACCESS_protected);
|
|
} else if (MemberDesc->isPrivate()) {
|
|
Member->AddUInt(DW_AT_accessibility, 0, DW_ACCESS_private);
|
|
} else if (Tag == DW_TAG_inheritance) {
|
|
Member->AddUInt(DW_AT_accessibility, 0, DW_ACCESS_public);
|
|
}
|
|
|
|
Ty->AddChild(Member);
|
|
} else if (GlobalVariableDesc *StaticDesc =
|
|
dyn_cast<GlobalVariableDesc>(Element)) {
|
|
// Add static member.
|
|
|
|
// Construct member debug information entry.
|
|
DIE *Static = new DIE(DW_TAG_variable);
|
|
|
|
// Add name and mangled name.
|
|
const std::string &Name = StaticDesc->getDisplayName();
|
|
const std::string &MangledName = StaticDesc->getName();
|
|
Static->AddString(DW_AT_name, DW_FORM_string, Name);
|
|
Static->AddString(DW_AT_MIPS_linkage_name, DW_FORM_string,
|
|
MangledName);
|
|
|
|
// Add location.
|
|
AddSourceLine(Static, StaticDesc->getFile(), StaticDesc->getLine());
|
|
|
|
// Add type.
|
|
if (TypeDesc *StaticTy = StaticDesc->getType()) {
|
|
Static->AddDIEntry(DW_AT_type, DW_FORM_ref4,
|
|
NewType(Context, StaticTy, Unit));
|
|
}
|
|
|
|
// Add flags.
|
|
Static->AddUInt(DW_AT_external, DW_FORM_flag, 1);
|
|
Static->AddUInt(DW_AT_declaration, DW_FORM_flag, 1);
|
|
|
|
Ty->AddChild(Static);
|
|
} else if (SubprogramDesc *MethodDesc =
|
|
dyn_cast<SubprogramDesc>(Element)) {
|
|
// Add member function.
|
|
|
|
// Construct member debug information entry.
|
|
DIE *Method = new DIE(DW_TAG_subprogram);
|
|
|
|
// Add name and mangled name.
|
|
const std::string &Name = MethodDesc->getDisplayName();
|
|
const std::string &MangledName = MethodDesc->getName();
|
|
bool IsCTor = false;
|
|
|
|
if (Name.empty()) {
|
|
Method->AddString(DW_AT_name, DW_FORM_string, MangledName);
|
|
IsCTor = TyDesc->getName() == MangledName;
|
|
} else {
|
|
Method->AddString(DW_AT_name, DW_FORM_string, Name);
|
|
Method->AddString(DW_AT_MIPS_linkage_name, DW_FORM_string,
|
|
MangledName);
|
|
}
|
|
|
|
// Add location.
|
|
AddSourceLine(Method, MethodDesc->getFile(), MethodDesc->getLine());
|
|
|
|
// Add type.
|
|
if (CompositeTypeDesc *MethodTy =
|
|
dyn_cast_or_null<CompositeTypeDesc>(MethodDesc->getType())) {
|
|
// Get argument information.
|
|
std::vector<DebugInfoDesc *> &Args = MethodTy->getElements();
|
|
|
|
// If not a ctor.
|
|
if (!IsCTor) {
|
|
// Add return type.
|
|
Method->AddDIEntry(DW_AT_type, DW_FORM_ref4,
|
|
NewType(Context, dyn_cast<TypeDesc>(Args[0]),
|
|
Unit));
|
|
}
|
|
|
|
// Add arguments.
|
|
for(unsigned i = 1, N = Args.size(); i < N; ++i) {
|
|
DIE *Arg = new DIE(DW_TAG_formal_parameter);
|
|
Arg->AddDIEntry(DW_AT_type, DW_FORM_ref4,
|
|
NewType(Context, cast<TypeDesc>(Args[i]), Unit));
|
|
Arg->AddUInt(DW_AT_artificial, DW_FORM_flag, 1);
|
|
Method->AddChild(Arg);
|
|
}
|
|
}
|
|
|
|
// Add flags.
|
|
Method->AddUInt(DW_AT_external, DW_FORM_flag, 1);
|
|
Method->AddUInt(DW_AT_declaration, DW_FORM_flag, 1);
|
|
|
|
Ty->AddChild(Method);
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
case DW_TAG_enumeration_type: {
|
|
// Add enumerators to enumeration type.
|
|
for(unsigned i = 0, N = Elements.size(); i < N; ++i) {
|
|
EnumeratorDesc *ED = cast<EnumeratorDesc>(Elements[i]);
|
|
const std::string &Name = ED->getName();
|
|
int64_t Value = ED->getValue();
|
|
DIE *Enumerator = new DIE(DW_TAG_enumerator);
|
|
Enumerator->AddString(DW_AT_name, DW_FORM_string, Name);
|
|
Enumerator->AddSInt(DW_AT_const_value, DW_FORM_sdata, Value);
|
|
Ty->AddChild(Enumerator);
|
|
}
|
|
|
|
break;
|
|
}
|
|
case DW_TAG_subroutine_type: {
|
|
// Add prototype flag.
|
|
Ty->AddUInt(DW_AT_prototyped, DW_FORM_flag, 1);
|
|
// Add return type.
|
|
Ty->AddDIEntry(DW_AT_type, DW_FORM_ref4,
|
|
NewType(Context, dyn_cast<TypeDesc>(Elements[0]), Unit));
|
|
|
|
// Add arguments.
|
|
for(unsigned i = 1, N = Elements.size(); i < N; ++i) {
|
|
DIE *Arg = new DIE(DW_TAG_formal_parameter);
|
|
Arg->AddDIEntry(DW_AT_type, DW_FORM_ref4,
|
|
NewType(Context, cast<TypeDesc>(Elements[i]), Unit));
|
|
Ty->AddChild(Arg);
|
|
}
|
|
|
|
break;
|
|
}
|
|
default: break;
|
|
}
|
|
}
|
|
|
|
assert(Ty && "Type not supported yet");
|
|
|
|
// Add size if non-zero (derived types don't have a size.)
|
|
if (Size) Ty->AddUInt(DW_AT_byte_size, 0, Size);
|
|
// Add name if not anonymous or intermediate type.
|
|
if (!Name.empty()) Ty->AddString(DW_AT_name, DW_FORM_string, Name);
|
|
// Add source line info if available.
|
|
AddSourceLine(Ty, TyDesc->getFile(), TyDesc->getLine());
|
|
|
|
// Add to context owner.
|
|
Context->AddChild(Ty);
|
|
|
|
return Slot;
|
|
}
|
|
|
|
/// NewCompileUnit - Create new compile unit and it's debug information entry.
|
|
///
|
|
CompileUnit *DwarfWriter::NewCompileUnit(CompileUnitDesc *UnitDesc,
|
|
unsigned ID) {
|
|
// Construct debug information entry.
|
|
DIE *Die = new DIE(DW_TAG_compile_unit);
|
|
Die->AddDelta (DW_AT_stmt_list, DW_FORM_data4, DWLabel("line", 0),
|
|
DWLabel("section_line", 0));
|
|
// Die->AddLabel (DW_AT_high_pc, DW_FORM_addr, DWLabel("text_end", 0));
|
|
// Die->AddLabel (DW_AT_low_pc, DW_FORM_addr, DWLabel("text_begin", 0));
|
|
Die->AddString(DW_AT_producer, DW_FORM_string, UnitDesc->getProducer());
|
|
Die->AddUInt (DW_AT_language, DW_FORM_data1, UnitDesc->getLanguage());
|
|
Die->AddString(DW_AT_name, DW_FORM_string, UnitDesc->getFileName());
|
|
Die->AddString(DW_AT_comp_dir, DW_FORM_string, UnitDesc->getDirectory());
|
|
|
|
// Add debug information entry to descriptor map.
|
|
DIE *&Slot = getDieMapSlotFor(UnitDesc);
|
|
Slot = Die;
|
|
|
|
// Construct compile unit.
|
|
CompileUnit *Unit = new CompileUnit(UnitDesc, ID, Die);
|
|
|
|
// Add Unit to compile unit map.
|
|
DescToUnitMap[UnitDesc] = Unit;
|
|
|
|
return Unit;
|
|
}
|
|
|
|
/// FindCompileUnit - Get the compile unit for the given descriptor.
|
|
///
|
|
CompileUnit *DwarfWriter::FindCompileUnit(CompileUnitDesc *UnitDesc) {
|
|
CompileUnit *Unit = DescToUnitMap[UnitDesc];
|
|
assert(Unit && "Missing compile unit.");
|
|
return Unit;
|
|
}
|
|
|
|
/// NewGlobalVariable - Add a new global variable DIE.
|
|
///
|
|
DIE *DwarfWriter::NewGlobalVariable(GlobalVariableDesc *GVD) {
|
|
// Get the compile unit context.
|
|
CompileUnitDesc *UnitDesc = static_cast<CompileUnitDesc *>(GVD->getContext());
|
|
CompileUnit *Unit = FindCompileUnit(UnitDesc);
|
|
|
|
// Check for pre-existence.
|
|
DIE *&Slot = Unit->getDieMapSlotFor(GVD);
|
|
if (Slot) return Slot;
|
|
|
|
// Get the global variable itself.
|
|
GlobalVariable *GV = GVD->getGlobalVariable();
|
|
|
|
const std::string &Name = GVD->hasMangledName() ? GVD->getDisplayName()
|
|
: GVD->getName();
|
|
const std::string &MangledName = GVD->hasMangledName() ? GVD->getName()
|
|
: "";
|
|
// Get the global's type.
|
|
DIE *Type = NewType(Unit->getDie(), GVD->getType(), Unit);
|
|
|
|
// Create the globale variable DIE.
|
|
DIE *VariableDie = new DIE(DW_TAG_variable);
|
|
VariableDie->AddString(DW_AT_name, DW_FORM_string, Name);
|
|
if (!MangledName.empty()) {
|
|
VariableDie->AddString(DW_AT_MIPS_linkage_name, DW_FORM_string,
|
|
MangledName);
|
|
}
|
|
VariableDie->AddDIEntry(DW_AT_type, DW_FORM_ref4, Type);
|
|
VariableDie->AddUInt(DW_AT_external, DW_FORM_flag, 1);
|
|
|
|
// Add source line info if available.
|
|
AddSourceLine(VariableDie, UnitDesc, GVD->getLine());
|
|
|
|
// Work up linkage name.
|
|
std::string LinkageName;
|
|
Asm->getGlobalLinkName(GV, LinkageName);
|
|
|
|
// Add address.
|
|
DIEBlock *Block = new DIEBlock();
|
|
Block->AddUInt(DW_FORM_data1, DW_OP_addr);
|
|
Block->AddObjectLabel(DW_FORM_udata, LinkageName);
|
|
Block->ComputeSize(*this);
|
|
VariableDie->AddBlock(DW_AT_location, 0, Block);
|
|
|
|
// Add to map.
|
|
Slot = VariableDie;
|
|
|
|
// Add to context owner.
|
|
Unit->getDie()->AddChild(VariableDie);
|
|
|
|
// Expose as global.
|
|
// FIXME - need to check external flag.
|
|
Unit->AddGlobal(Name, VariableDie);
|
|
|
|
return VariableDie;
|
|
}
|
|
|
|
/// NewSubprogram - Add a new subprogram DIE.
|
|
///
|
|
DIE *DwarfWriter::NewSubprogram(SubprogramDesc *SPD) {
|
|
// Get the compile unit context.
|
|
CompileUnitDesc *UnitDesc = static_cast<CompileUnitDesc *>(SPD->getContext());
|
|
CompileUnit *Unit = FindCompileUnit(UnitDesc);
|
|
|
|
// Check for pre-existence.
|
|
DIE *&Slot = Unit->getDieMapSlotFor(SPD);
|
|
if (Slot) return Slot;
|
|
|
|
// Gather the details (simplify add attribute code.)
|
|
const std::string &Name = SPD->hasMangledName() ? SPD->getDisplayName()
|
|
: SPD->getName();
|
|
const std::string &MangledName = SPD->hasMangledName() ? SPD->getName()
|
|
: "";
|
|
DIE *Type = NewType(Unit->getDie(), SPD->getType(), Unit);
|
|
unsigned IsExternal = SPD->isStatic() ? 0 : 1;
|
|
|
|
DIE *SubprogramDie = new DIE(DW_TAG_subprogram);
|
|
SubprogramDie->AddString(DW_AT_name, DW_FORM_string, Name);
|
|
if (!MangledName.empty()) {
|
|
SubprogramDie->AddString(DW_AT_MIPS_linkage_name, DW_FORM_string,
|
|
MangledName);
|
|
}
|
|
if (Type) {
|
|
SubprogramDie->AddDIEntry(DW_AT_type, DW_FORM_ref4, Type);
|
|
}
|
|
SubprogramDie->AddUInt(DW_AT_external, DW_FORM_flag, IsExternal);
|
|
SubprogramDie->AddUInt(DW_AT_prototyped, DW_FORM_flag, 1);
|
|
|
|
// Add source line info if available.
|
|
AddSourceLine(SubprogramDie, UnitDesc, SPD->getLine());
|
|
|
|
// Add to map.
|
|
Slot = SubprogramDie;
|
|
|
|
// Add to context owner.
|
|
Unit->getDie()->AddChild(SubprogramDie);
|
|
|
|
// Expose as global.
|
|
Unit->AddGlobal(Name, SubprogramDie);
|
|
|
|
return SubprogramDie;
|
|
}
|
|
|
|
/// NewScopeVariable - Create a new scope variable.
|
|
///
|
|
DIE *DwarfWriter::NewScopeVariable(DebugVariable *DV, CompileUnit *Unit) {
|
|
// Get the descriptor.
|
|
VariableDesc *VD = DV->getDesc();
|
|
|
|
// Translate tag to proper Dwarf tag. The result variable is dropped for now.
|
|
unsigned Tag;
|
|
switch (VD->getTag()) {
|
|
case DW_TAG_return_variable: return NULL;
|
|
case DW_TAG_arg_variable: Tag = DW_TAG_formal_parameter; break;
|
|
case DW_TAG_auto_variable: // fall thru
|
|
default: Tag = DW_TAG_variable; break;
|
|
}
|
|
|
|
// Define variable debug information entry.
|
|
DIE *VariableDie = new DIE(Tag);
|
|
VariableDie->AddString(DW_AT_name, DW_FORM_string, VD->getName());
|
|
|
|
// Add source line info if available.
|
|
AddSourceLine(VariableDie, VD->getFile(), VD->getLine());
|
|
|
|
// Add variable type.
|
|
DIE *Type = NewType(Unit->getDie(), VD->getType(), Unit);
|
|
VariableDie->AddDIEntry(DW_AT_type, DW_FORM_ref4, Type);
|
|
|
|
// Add variable address.
|
|
MachineLocation Location;
|
|
RI->getLocation(*MF, DV->getFrameIndex(), Location);
|
|
AddAddress(VariableDie, DW_AT_location, Location);
|
|
|
|
return VariableDie;
|
|
}
|
|
|
|
/// ConstructScope - Construct the components of a scope.
|
|
///
|
|
void DwarfWriter::ConstructScope(DebugScope *ParentScope,
|
|
DIE *ParentDie, CompileUnit *Unit) {
|
|
// Add variables to scope.
|
|
std::vector<DebugVariable *> &Variables = ParentScope->getVariables();
|
|
for (unsigned i = 0, N = Variables.size(); i < N; ++i) {
|
|
DIE *VariableDie = NewScopeVariable(Variables[i], Unit);
|
|
if (VariableDie) ParentDie->AddChild(VariableDie);
|
|
}
|
|
|
|
// Add nested scopes.
|
|
std::vector<DebugScope *> &Scopes = ParentScope->getScopes();
|
|
for (unsigned j = 0, M = Scopes.size(); j < M; ++j) {
|
|
// Define the Scope debug information entry.
|
|
DebugScope *Scope = Scopes[j];
|
|
// FIXME - Ignore inlined functions for the time being.
|
|
if (!Scope->getParent()) continue;
|
|
|
|
DIE *ScopeDie = new DIE(DW_TAG_lexical_block);
|
|
|
|
// Add the scope bounds.
|
|
if (unsigned StartID = Scope->getStartLabelID()) {
|
|
ScopeDie->AddLabel(DW_AT_low_pc, DW_FORM_addr,
|
|
DWLabel("loc", StartID));
|
|
} else {
|
|
ScopeDie->AddLabel(DW_AT_low_pc, DW_FORM_addr,
|
|
DWLabel("func_begin", SubprogramCount));
|
|
}
|
|
if (unsigned EndID = Scope->getEndLabelID()) {
|
|
ScopeDie->AddLabel(DW_AT_high_pc, DW_FORM_addr,
|
|
DWLabel("loc", EndID));
|
|
} else {
|
|
ScopeDie->AddLabel(DW_AT_high_pc, DW_FORM_addr,
|
|
DWLabel("func_end", SubprogramCount));
|
|
}
|
|
|
|
// Add the scope contents.
|
|
ConstructScope(Scope, ScopeDie, Unit);
|
|
ParentDie->AddChild(ScopeDie);
|
|
}
|
|
}
|
|
|
|
/// ConstructRootScope - Construct the scope for the subprogram.
|
|
///
|
|
void DwarfWriter::ConstructRootScope(DebugScope *RootScope) {
|
|
// Exit if there is no root scope.
|
|
if (!RootScope) return;
|
|
|
|
// Get the subprogram debug information entry.
|
|
SubprogramDesc *SPD = cast<SubprogramDesc>(RootScope->getDesc());
|
|
|
|
// Get the compile unit context.
|
|
CompileUnitDesc *UnitDesc = static_cast<CompileUnitDesc *>(SPD->getContext());
|
|
CompileUnit *Unit = FindCompileUnit(UnitDesc);
|
|
|
|
// Get the subprogram die.
|
|
DIE *SPDie = Unit->getDieMapSlotFor(SPD);
|
|
assert(SPDie && "Missing subprogram descriptor");
|
|
|
|
// Add the function bounds.
|
|
SPDie->AddLabel(DW_AT_low_pc, DW_FORM_addr,
|
|
DWLabel("func_begin", SubprogramCount));
|
|
SPDie->AddLabel(DW_AT_high_pc, DW_FORM_addr,
|
|
DWLabel("func_end", SubprogramCount));
|
|
MachineLocation Location(RI->getFrameRegister(*MF));
|
|
AddAddress(SPDie, DW_AT_frame_base, Location);
|
|
|
|
ConstructScope(RootScope, SPDie, Unit);
|
|
}
|
|
|
|
/// EmitInitial - Emit initial Dwarf declarations. This is necessary for cc
|
|
/// tools to recognize the object file contains Dwarf information.
|
|
///
|
|
void DwarfWriter::EmitInitial() {
|
|
// Check to see if we already emitted intial headers.
|
|
if (didInitial) return;
|
|
didInitial = true;
|
|
|
|
// Dwarf sections base addresses.
|
|
Asm->SwitchToDataSection(TAI->getDwarfFrameSection(), 0);
|
|
EmitLabel("section_frame", 0);
|
|
Asm->SwitchToDataSection(TAI->getDwarfInfoSection(), 0);
|
|
EmitLabel("section_info", 0);
|
|
EmitLabel("info", 0);
|
|
Asm->SwitchToDataSection(TAI->getDwarfAbbrevSection(), 0);
|
|
EmitLabel("section_abbrev", 0);
|
|
EmitLabel("abbrev", 0);
|
|
Asm->SwitchToDataSection(TAI->getDwarfARangesSection(), 0);
|
|
EmitLabel("section_aranges", 0);
|
|
Asm->SwitchToDataSection(TAI->getDwarfMacInfoSection(), 0);
|
|
EmitLabel("section_macinfo", 0);
|
|
Asm->SwitchToDataSection(TAI->getDwarfLineSection(), 0);
|
|
EmitLabel("section_line", 0);
|
|
EmitLabel("line", 0);
|
|
Asm->SwitchToDataSection(TAI->getDwarfLocSection(), 0);
|
|
EmitLabel("section_loc", 0);
|
|
Asm->SwitchToDataSection(TAI->getDwarfPubNamesSection(), 0);
|
|
EmitLabel("section_pubnames", 0);
|
|
Asm->SwitchToDataSection(TAI->getDwarfStrSection(), 0);
|
|
EmitLabel("section_str", 0);
|
|
Asm->SwitchToDataSection(TAI->getDwarfRangesSection(), 0);
|
|
EmitLabel("section_ranges", 0);
|
|
|
|
Asm->SwitchToTextSection(TAI->getTextSection(), 0);
|
|
EmitLabel("text_begin", 0);
|
|
Asm->SwitchToDataSection(TAI->getDataSection(), 0);
|
|
EmitLabel("data_begin", 0);
|
|
|
|
// Emit common frame information.
|
|
EmitInitialDebugFrame();
|
|
}
|
|
|
|
/// EmitDIE - Recusively Emits a debug information entry.
|
|
///
|
|
void DwarfWriter::EmitDIE(DIE *Die) const {
|
|
// Get the abbreviation for this DIE.
|
|
unsigned AbbrevID = Die->getAbbrevID();
|
|
const DIEAbbrev &Abbrev = Abbreviations[AbbrevID];
|
|
|
|
O << "\n";
|
|
|
|
// Emit the code (index) for the abbreviation.
|
|
EmitULEB128Bytes(AbbrevID);
|
|
EOL(std::string("Abbrev [" +
|
|
utostr(AbbrevID) +
|
|
"] 0x" + utohexstr(Die->getOffset()) +
|
|
":0x" + utohexstr(Die->getSize()) + " " +
|
|
TagString(Abbrev.getTag())));
|
|
|
|
const std::vector<DIEValue *> &Values = Die->getValues();
|
|
const std::vector<DIEAbbrevData> &AbbrevData = Abbrev.getData();
|
|
|
|
// Emit the DIE attribute values.
|
|
for (unsigned i = 0, N = Values.size(); i < N; ++i) {
|
|
unsigned Attr = AbbrevData[i].getAttribute();
|
|
unsigned Form = AbbrevData[i].getForm();
|
|
assert(Form && "Too many attributes for DIE (check abbreviation)");
|
|
|
|
switch (Attr) {
|
|
case DW_AT_sibling: {
|
|
EmitInt32(Die->SiblingOffset());
|
|
break;
|
|
}
|
|
default: {
|
|
// Emit an attribute using the defined form.
|
|
Values[i]->EmitValue(*this, Form);
|
|
break;
|
|
}
|
|
}
|
|
|
|
EOL(AttributeString(Attr));
|
|
}
|
|
|
|
// Emit the DIE children if any.
|
|
if (Abbrev.getChildrenFlag() == DW_CHILDREN_yes) {
|
|
const std::vector<DIE *> &Children = Die->getChildren();
|
|
|
|
for (unsigned j = 0, M = Children.size(); j < M; ++j) {
|
|
EmitDIE(Children[j]);
|
|
}
|
|
|
|
EmitInt8(0); EOL("End Of Children Mark");
|
|
}
|
|
}
|
|
|
|
/// SizeAndOffsetDie - Compute the size and offset of a DIE.
|
|
///
|
|
unsigned DwarfWriter::SizeAndOffsetDie(DIE *Die, unsigned Offset, bool Last) {
|
|
// Get the children.
|
|
const std::vector<DIE *> &Children = Die->getChildren();
|
|
|
|
// If not last sibling and has children then add sibling offset attribute.
|
|
if (!Last && !Children.empty()) Die->AddSiblingOffset();
|
|
|
|
// Record the abbreviation.
|
|
Die->Complete(*this);
|
|
|
|
// Get the abbreviation for this DIE.
|
|
unsigned AbbrevID = Die->getAbbrevID();
|
|
const DIEAbbrev &Abbrev = Abbreviations[AbbrevID];
|
|
|
|
// Set DIE offset
|
|
Die->setOffset(Offset);
|
|
|
|
// Start the size with the size of abbreviation code.
|
|
Offset += SizeULEB128(AbbrevID);
|
|
|
|
const std::vector<DIEValue *> &Values = Die->getValues();
|
|
const std::vector<DIEAbbrevData> &AbbrevData = Abbrev.getData();
|
|
|
|
// Emit the DIE attribute values.
|
|
for (unsigned i = 0, N = Values.size(); i < N; ++i) {
|
|
// Size attribute value.
|
|
Offset += Values[i]->SizeOf(*this, AbbrevData[i].getForm());
|
|
}
|
|
|
|
// Emit the DIE children if any.
|
|
if (!Children.empty()) {
|
|
assert(Abbrev.getChildrenFlag() == DW_CHILDREN_yes &&
|
|
"Children flag not set");
|
|
|
|
for (unsigned j = 0, M = Children.size(); j < M; ++j) {
|
|
Offset = SizeAndOffsetDie(Children[j], Offset, (j + 1) == M);
|
|
}
|
|
|
|
// End of children marker.
|
|
Offset += sizeof(int8_t);
|
|
}
|
|
|
|
Die->setSize(Offset - Die->getOffset());
|
|
return Offset;
|
|
}
|
|
|
|
/// SizeAndOffsets - Compute the size and offset of all the DIEs.
|
|
///
|
|
void DwarfWriter::SizeAndOffsets() {
|
|
|
|
// Process each compile unit.
|
|
for (unsigned i = 0, N = CompileUnits.size(); i < N; ++i) {
|
|
CompileUnit *Unit = CompileUnits[i];
|
|
if (Unit->hasContent()) {
|
|
// Compute size of compile unit header
|
|
unsigned Offset = sizeof(int32_t) + // Length of Compilation Unit Info
|
|
sizeof(int16_t) + // DWARF version number
|
|
sizeof(int32_t) + // Offset Into Abbrev. Section
|
|
sizeof(int8_t); // Pointer Size (in bytes)
|
|
SizeAndOffsetDie(Unit->getDie(), Offset, (i + 1) == N);
|
|
}
|
|
}
|
|
}
|
|
|
|
/// EmitFrameMoves - Emit frame instructions to describe the layout of the
|
|
/// frame.
|
|
void DwarfWriter::EmitFrameMoves(const char *BaseLabel, unsigned BaseLabelID,
|
|
std::vector<MachineMove *> &Moves) {
|
|
for (unsigned i = 0, N = Moves.size(); i < N; ++i) {
|
|
MachineMove *Move = Moves[i];
|
|
unsigned LabelID = Move->getLabelID();
|
|
const MachineLocation &Dst = Move->getDestination();
|
|
const MachineLocation &Src = Move->getSource();
|
|
|
|
// Advance row if new location.
|
|
if (BaseLabel && LabelID && BaseLabelID != LabelID) {
|
|
EmitInt8(DW_CFA_advance_loc4);
|
|
EOL("DW_CFA_advance_loc4");
|
|
EmitDifference("loc", LabelID, BaseLabel, BaseLabelID);
|
|
EOL("");
|
|
|
|
BaseLabelID = LabelID;
|
|
BaseLabel = "loc";
|
|
}
|
|
|
|
int stackGrowth =
|
|
Asm->TM.getFrameInfo()->getStackGrowthDirection() ==
|
|
TargetFrameInfo::StackGrowsUp ?
|
|
TAI->getAddressSize() : -TAI->getAddressSize();
|
|
|
|
// If advancing cfa.
|
|
if (Dst.isRegister() && Dst.getRegister() == MachineLocation::VirtualFP) {
|
|
if (!Src.isRegister()) {
|
|
if (Src.getRegister() == MachineLocation::VirtualFP) {
|
|
EmitInt8(DW_CFA_def_cfa_offset);
|
|
EOL("DW_CFA_def_cfa_offset");
|
|
} else {
|
|
EmitInt8(DW_CFA_def_cfa);
|
|
EOL("DW_CFA_def_cfa");
|
|
|
|
EmitULEB128Bytes(RI->getDwarfRegNum(Src.getRegister()));
|
|
EOL("Register");
|
|
}
|
|
|
|
int Offset = Src.getOffset() / stackGrowth;
|
|
|
|
EmitULEB128Bytes(Offset);
|
|
EOL("Offset");
|
|
} else {
|
|
assert(0 && "Machine move no supported yet.");
|
|
}
|
|
} else {
|
|
unsigned Reg = RI->getDwarfRegNum(Src.getRegister());
|
|
int Offset = Dst.getOffset() / stackGrowth;
|
|
|
|
if (Offset < 0) {
|
|
EmitInt8(DW_CFA_offset_extended_sf);
|
|
EOL("DW_CFA_offset_extended_sf");
|
|
EmitULEB128Bytes(Reg);
|
|
EOL("Reg");
|
|
EmitSLEB128Bytes(Offset);
|
|
EOL("Offset");
|
|
} else if (Reg < 64) {
|
|
EmitInt8(DW_CFA_offset + Reg);
|
|
EOL("DW_CFA_offset + Reg");
|
|
EmitULEB128Bytes(Offset);
|
|
EOL("Offset");
|
|
} else {
|
|
EmitInt8(DW_CFA_offset_extended);
|
|
EOL("DW_CFA_offset_extended");
|
|
EmitULEB128Bytes(Reg);
|
|
EOL("Reg");
|
|
EmitULEB128Bytes(Offset);
|
|
EOL("Offset");
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/// EmitDebugInfo - Emit the debug info section.
|
|
///
|
|
void DwarfWriter::EmitDebugInfo() const {
|
|
// Start debug info section.
|
|
Asm->SwitchToDataSection(TAI->getDwarfInfoSection(), 0);
|
|
|
|
// Process each compile unit.
|
|
for (unsigned i = 0, N = CompileUnits.size(); i < N; ++i) {
|
|
CompileUnit *Unit = CompileUnits[i];
|
|
|
|
if (Unit->hasContent()) {
|
|
DIE *Die = Unit->getDie();
|
|
// Emit the compile units header.
|
|
EmitLabel("info_begin", Unit->getID());
|
|
// Emit size of content not including length itself
|
|
unsigned ContentSize = Die->getSize() +
|
|
sizeof(int16_t) + // DWARF version number
|
|
sizeof(int32_t) + // Offset Into Abbrev. Section
|
|
sizeof(int8_t); // Pointer Size (in bytes)
|
|
|
|
EmitInt32(ContentSize); EOL("Length of Compilation Unit Info");
|
|
EmitInt16(DWARF_VERSION); EOL("DWARF version number");
|
|
EmitDifference("abbrev_begin", 0, "section_abbrev", 0);
|
|
EOL("Offset Into Abbrev. Section");
|
|
EmitInt8(TAI->getAddressSize()); EOL("Address Size (in bytes)");
|
|
|
|
EmitDIE(Die);
|
|
EmitLabel("info_end", Unit->getID());
|
|
}
|
|
|
|
O << "\n";
|
|
}
|
|
}
|
|
|
|
/// EmitAbbreviations - Emit the abbreviation section.
|
|
///
|
|
void DwarfWriter::EmitAbbreviations() const {
|
|
// Check to see if it is worth the effort.
|
|
if (!Abbreviations.empty()) {
|
|
// Start the debug abbrev section.
|
|
Asm->SwitchToDataSection(TAI->getDwarfAbbrevSection(), 0);
|
|
|
|
EmitLabel("abbrev_begin", 0);
|
|
|
|
// For each abbrevation.
|
|
for (unsigned AbbrevID = 1, NAID = Abbreviations.size();
|
|
AbbrevID <= NAID; ++AbbrevID) {
|
|
// Get abbreviation data
|
|
const DIEAbbrev &Abbrev = Abbreviations[AbbrevID];
|
|
|
|
// Emit the abbrevations code (base 1 index.)
|
|
EmitULEB128Bytes(AbbrevID); EOL("Abbreviation Code");
|
|
|
|
// Emit the abbreviations data.
|
|
Abbrev.Emit(*this);
|
|
|
|
O << "\n";
|
|
}
|
|
|
|
EmitLabel("abbrev_end", 0);
|
|
|
|
O << "\n";
|
|
}
|
|
}
|
|
|
|
/// EmitDebugLines - Emit source line information.
|
|
///
|
|
void DwarfWriter::EmitDebugLines() const {
|
|
// Minimum line delta, thus ranging from -10..(255-10).
|
|
const int MinLineDelta = -(DW_LNS_fixed_advance_pc + 1);
|
|
// Maximum line delta, thus ranging from -10..(255-10).
|
|
const int MaxLineDelta = 255 + MinLineDelta;
|
|
|
|
// Start the dwarf line section.
|
|
Asm->SwitchToDataSection(TAI->getDwarfLineSection(), 0);
|
|
|
|
// Construct the section header.
|
|
|
|
EmitDifference("line_end", 0, "line_begin", 0);
|
|
EOL("Length of Source Line Info");
|
|
EmitLabel("line_begin", 0);
|
|
|
|
EmitInt16(DWARF_VERSION); EOL("DWARF version number");
|
|
|
|
EmitDifference("line_prolog_end", 0, "line_prolog_begin", 0);
|
|
EOL("Prolog Length");
|
|
EmitLabel("line_prolog_begin", 0);
|
|
|
|
EmitInt8(1); EOL("Minimum Instruction Length");
|
|
|
|
EmitInt8(1); EOL("Default is_stmt_start flag");
|
|
|
|
EmitInt8(MinLineDelta); EOL("Line Base Value (Special Opcodes)");
|
|
|
|
EmitInt8(MaxLineDelta); EOL("Line Range Value (Special Opcodes)");
|
|
|
|
EmitInt8(-MinLineDelta); EOL("Special Opcode Base");
|
|
|
|
// Line number standard opcode encodings argument count
|
|
EmitInt8(0); EOL("DW_LNS_copy arg count");
|
|
EmitInt8(1); EOL("DW_LNS_advance_pc arg count");
|
|
EmitInt8(1); EOL("DW_LNS_advance_line arg count");
|
|
EmitInt8(1); EOL("DW_LNS_set_file arg count");
|
|
EmitInt8(1); EOL("DW_LNS_set_column arg count");
|
|
EmitInt8(0); EOL("DW_LNS_negate_stmt arg count");
|
|
EmitInt8(0); EOL("DW_LNS_set_basic_block arg count");
|
|
EmitInt8(0); EOL("DW_LNS_const_add_pc arg count");
|
|
EmitInt8(1); EOL("DW_LNS_fixed_advance_pc arg count");
|
|
|
|
const UniqueVector<std::string> &Directories = DebugInfo->getDirectories();
|
|
const UniqueVector<SourceFileInfo> &SourceFiles = DebugInfo->getSourceFiles();
|
|
|
|
// Emit directories.
|
|
for (unsigned DirectoryID = 1, NDID = Directories.size();
|
|
DirectoryID <= NDID; ++DirectoryID) {
|
|
EmitString(Directories[DirectoryID]); EOL("Directory");
|
|
}
|
|
EmitInt8(0); EOL("End of directories");
|
|
|
|
// Emit files.
|
|
for (unsigned SourceID = 1, NSID = SourceFiles.size();
|
|
SourceID <= NSID; ++SourceID) {
|
|
const SourceFileInfo &SourceFile = SourceFiles[SourceID];
|
|
EmitString(SourceFile.getName()); EOL("Source");
|
|
EmitULEB128Bytes(SourceFile.getDirectoryID()); EOL("Directory #");
|
|
EmitULEB128Bytes(0); EOL("Mod date");
|
|
EmitULEB128Bytes(0); EOL("File size");
|
|
}
|
|
EmitInt8(0); EOL("End of files");
|
|
|
|
EmitLabel("line_prolog_end", 0);
|
|
|
|
// A sequence for each text section.
|
|
for (unsigned j = 0, M = SectionSourceLines.size(); j < M; ++j) {
|
|
// Isolate current sections line info.
|
|
const std::vector<SourceLineInfo *> &LineInfos = SectionSourceLines[j];
|
|
|
|
if (DwarfVerbose) {
|
|
O << "\t"
|
|
<< TAI->getCommentString() << " "
|
|
<< "Section "
|
|
<< SectionMap[j + 1].c_str() << "\n";
|
|
}
|
|
|
|
// Dwarf assumes we start with first line of first source file.
|
|
unsigned Source = 1;
|
|
unsigned Line = 1;
|
|
|
|
// Construct rows of the address, source, line, column matrix.
|
|
for (unsigned i = 0, N = LineInfos.size(); i < N; ++i) {
|
|
SourceLineInfo *LineInfo = LineInfos[i];
|
|
|
|
if (DwarfVerbose) {
|
|
unsigned SourceID = LineInfo->getSourceID();
|
|
const SourceFileInfo &SourceFile = SourceFiles[SourceID];
|
|
unsigned DirectoryID = SourceFile.getDirectoryID();
|
|
O << "\t"
|
|
<< TAI->getCommentString() << " "
|
|
<< Directories[DirectoryID]
|
|
<< SourceFile.getName() << ":"
|
|
<< LineInfo->getLine() << "\n";
|
|
}
|
|
|
|
// Define the line address.
|
|
EmitInt8(0); EOL("Extended Op");
|
|
EmitInt8(4 + 1); EOL("Op size");
|
|
EmitInt8(DW_LNE_set_address); EOL("DW_LNE_set_address");
|
|
EmitReference("loc", LineInfo->getLabelID()); EOL("Location label");
|
|
|
|
// If change of source, then switch to the new source.
|
|
if (Source != LineInfo->getSourceID()) {
|
|
Source = LineInfo->getSourceID();
|
|
EmitInt8(DW_LNS_set_file); EOL("DW_LNS_set_file");
|
|
EmitULEB128Bytes(Source); EOL("New Source");
|
|
}
|
|
|
|
// If change of line.
|
|
if (Line != LineInfo->getLine()) {
|
|
// Determine offset.
|
|
int Offset = LineInfo->getLine() - Line;
|
|
int Delta = Offset - MinLineDelta;
|
|
|
|
// Update line.
|
|
Line = LineInfo->getLine();
|
|
|
|
// If delta is small enough and in range...
|
|
if (Delta >= 0 && Delta < (MaxLineDelta - 1)) {
|
|
// ... then use fast opcode.
|
|
EmitInt8(Delta - MinLineDelta); EOL("Line Delta");
|
|
} else {
|
|
// ... otherwise use long hand.
|
|
EmitInt8(DW_LNS_advance_line); EOL("DW_LNS_advance_line");
|
|
EmitSLEB128Bytes(Offset); EOL("Line Offset");
|
|
EmitInt8(DW_LNS_copy); EOL("DW_LNS_copy");
|
|
}
|
|
} else {
|
|
// Copy the previous row (different address or source)
|
|
EmitInt8(DW_LNS_copy); EOL("DW_LNS_copy");
|
|
}
|
|
}
|
|
|
|
// Define last address of section.
|
|
EmitInt8(0); EOL("Extended Op");
|
|
EmitInt8(4 + 1); EOL("Op size");
|
|
EmitInt8(DW_LNE_set_address); EOL("DW_LNE_set_address");
|
|
EmitReference("section_end", j + 1); EOL("Section end label");
|
|
|
|
// Mark end of matrix.
|
|
EmitInt8(0); EOL("DW_LNE_end_sequence");
|
|
EmitULEB128Bytes(1); O << "\n";
|
|
EmitInt8(1); O << "\n";
|
|
}
|
|
|
|
EmitLabel("line_end", 0);
|
|
|
|
O << "\n";
|
|
}
|
|
|
|
/// EmitInitialDebugFrame - Emit common frame info into a debug frame section.
|
|
///
|
|
void DwarfWriter::EmitInitialDebugFrame() {
|
|
int stackGrowth =
|
|
Asm->TM.getFrameInfo()->getStackGrowthDirection() ==
|
|
TargetFrameInfo::StackGrowsUp ?
|
|
TAI->getAddressSize() : -TAI->getAddressSize();
|
|
|
|
// Start the dwarf frame section.
|
|
Asm->SwitchToDataSection(TAI->getDwarfFrameSection(), 0);
|
|
|
|
EmitLabel("frame_common", 0);
|
|
EmitDifference("frame_common_end", 0,
|
|
"frame_common_begin", 0);
|
|
EOL("Length of Common Information Entry");
|
|
|
|
EmitLabel("frame_common_begin", 0);
|
|
EmitInt32(DW_CIE_ID); EOL("CIE Identifier Tag");
|
|
EmitInt8(DW_CIE_VERSION); EOL("CIE Version");
|
|
EmitString(""); EOL("CIE Augmentation");
|
|
EmitULEB128Bytes(1); EOL("CIE Code Alignment Factor");
|
|
EmitSLEB128Bytes(stackGrowth); EOL("CIE Data Alignment Factor");
|
|
EmitInt8(RI->getDwarfRegNum(RI->getRARegister())); EOL("CIE RA Column");
|
|
|
|
std::vector<MachineMove *> Moves;
|
|
RI->getInitialFrameState(Moves);
|
|
EmitFrameMoves(NULL, 0, Moves);
|
|
for (unsigned i = 0, N = Moves.size(); i < N; ++i) delete Moves[i];
|
|
|
|
EmitAlign(2);
|
|
EmitLabel("frame_common_end", 0);
|
|
|
|
O << "\n";
|
|
}
|
|
|
|
/// EmitFunctionDebugFrame - Emit per function frame info into a debug frame
|
|
/// section.
|
|
void DwarfWriter::EmitFunctionDebugFrame() {
|
|
// Start the dwarf frame section.
|
|
Asm->SwitchToDataSection(TAI->getDwarfFrameSection(), 0);
|
|
|
|
EmitDifference("frame_end", SubprogramCount,
|
|
"frame_begin", SubprogramCount);
|
|
EOL("Length of Frame Information Entry");
|
|
|
|
EmitLabel("frame_begin", SubprogramCount);
|
|
|
|
EmitDifference("frame_common", 0, "section_frame", 0);
|
|
EOL("FDE CIE offset");
|
|
|
|
EmitReference("func_begin", SubprogramCount); EOL("FDE initial location");
|
|
EmitDifference("func_end", SubprogramCount,
|
|
"func_begin", SubprogramCount);
|
|
EOL("FDE address range");
|
|
|
|
std::vector<MachineMove *> &Moves = DebugInfo->getFrameMoves();
|
|
|
|
EmitFrameMoves("func_begin", SubprogramCount, Moves);
|
|
|
|
EmitAlign(2);
|
|
EmitLabel("frame_end", SubprogramCount);
|
|
|
|
O << "\n";
|
|
}
|
|
|
|
/// EmitDebugPubNames - Emit visible names into a debug pubnames section.
|
|
///
|
|
void DwarfWriter::EmitDebugPubNames() {
|
|
// Start the dwarf pubnames section.
|
|
Asm->SwitchToDataSection(TAI->getDwarfPubNamesSection(), 0);
|
|
|
|
// Process each compile unit.
|
|
for (unsigned i = 0, N = CompileUnits.size(); i < N; ++i) {
|
|
CompileUnit *Unit = CompileUnits[i];
|
|
|
|
if (Unit->hasContent()) {
|
|
EmitDifference("pubnames_end", Unit->getID(),
|
|
"pubnames_begin", Unit->getID());
|
|
EOL("Length of Public Names Info");
|
|
|
|
EmitLabel("pubnames_begin", Unit->getID());
|
|
|
|
EmitInt16(DWARF_VERSION); EOL("DWARF Version");
|
|
|
|
EmitDifference("info_begin", Unit->getID(), "section_info", 0);
|
|
EOL("Offset of Compilation Unit Info");
|
|
|
|
EmitDifference("info_end", Unit->getID(), "info_begin", Unit->getID());
|
|
EOL("Compilation Unit Length");
|
|
|
|
std::map<std::string, DIE *> &Globals = Unit->getGlobals();
|
|
|
|
for (std::map<std::string, DIE *>::iterator GI = Globals.begin(),
|
|
GE = Globals.end();
|
|
GI != GE; ++GI) {
|
|
const std::string &Name = GI->first;
|
|
DIE * Entity = GI->second;
|
|
|
|
EmitInt32(Entity->getOffset()); EOL("DIE offset");
|
|
EmitString(Name); EOL("External Name");
|
|
}
|
|
|
|
EmitInt32(0); EOL("End Mark");
|
|
EmitLabel("pubnames_end", Unit->getID());
|
|
|
|
O << "\n";
|
|
}
|
|
}
|
|
}
|
|
|
|
/// EmitDebugStr - Emit visible names into a debug str section.
|
|
///
|
|
void DwarfWriter::EmitDebugStr() {
|
|
// Check to see if it is worth the effort.
|
|
if (!StringPool.empty()) {
|
|
// Start the dwarf str section.
|
|
Asm->SwitchToDataSection(TAI->getDwarfStrSection(), 0);
|
|
|
|
// For each of strings in the string pool.
|
|
for (unsigned StringID = 1, N = StringPool.size();
|
|
StringID <= N; ++StringID) {
|
|
// Emit a label for reference from debug information entries.
|
|
EmitLabel("string", StringID);
|
|
// Emit the string itself.
|
|
const std::string &String = StringPool[StringID];
|
|
EmitString(String); O << "\n";
|
|
}
|
|
|
|
O << "\n";
|
|
}
|
|
}
|
|
|
|
/// EmitDebugLoc - Emit visible names into a debug loc section.
|
|
///
|
|
void DwarfWriter::EmitDebugLoc() {
|
|
// Start the dwarf loc section.
|
|
Asm->SwitchToDataSection(TAI->getDwarfLocSection(), 0);
|
|
|
|
O << "\n";
|
|
}
|
|
|
|
/// EmitDebugARanges - Emit visible names into a debug aranges section.
|
|
///
|
|
void DwarfWriter::EmitDebugARanges() {
|
|
// Start the dwarf aranges section.
|
|
Asm->SwitchToDataSection(TAI->getDwarfARangesSection(), 0);
|
|
|
|
// FIXME - Mock up
|
|
#if 0
|
|
// Process each compile unit.
|
|
for (unsigned i = 0, N = CompileUnits.size(); i < N; ++i) {
|
|
CompileUnit *Unit = CompileUnits[i];
|
|
|
|
if (Unit->hasContent()) {
|
|
// Don't include size of length
|
|
EmitInt32(0x1c); EOL("Length of Address Ranges Info");
|
|
|
|
EmitInt16(DWARF_VERSION); EOL("Dwarf Version");
|
|
|
|
EmitReference("info_begin", Unit->getID());
|
|
EOL("Offset of Compilation Unit Info");
|
|
|
|
EmitInt8(TAI->getAddressSize()); EOL("Size of Address");
|
|
|
|
EmitInt8(0); EOL("Size of Segment Descriptor");
|
|
|
|
EmitInt16(0); EOL("Pad (1)");
|
|
EmitInt16(0); EOL("Pad (2)");
|
|
|
|
// Range 1
|
|
EmitReference("text_begin", 0); EOL("Address");
|
|
EmitDifference("text_end", 0, "text_begin", 0); EOL("Length");
|
|
|
|
EmitInt32(0); EOL("EOM (1)");
|
|
EmitInt32(0); EOL("EOM (2)");
|
|
|
|
O << "\n";
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
|
|
/// EmitDebugRanges - Emit visible names into a debug ranges section.
|
|
///
|
|
void DwarfWriter::EmitDebugRanges() {
|
|
// Start the dwarf ranges section.
|
|
Asm->SwitchToDataSection(TAI->getDwarfRangesSection(), 0);
|
|
|
|
O << "\n";
|
|
}
|
|
|
|
/// EmitDebugMacInfo - Emit visible names into a debug macinfo section.
|
|
///
|
|
void DwarfWriter::EmitDebugMacInfo() {
|
|
// Start the dwarf macinfo section.
|
|
Asm->SwitchToDataSection(TAI->getDwarfMacInfoSection(), 0);
|
|
|
|
O << "\n";
|
|
}
|
|
|
|
/// ConstructCompileUnitDIEs - Create a compile unit DIE for each source and
|
|
/// header file.
|
|
void DwarfWriter::ConstructCompileUnitDIEs() {
|
|
const UniqueVector<CompileUnitDesc *> CUW = DebugInfo->getCompileUnits();
|
|
|
|
for (unsigned i = 1, N = CUW.size(); i <= N; ++i) {
|
|
CompileUnit *Unit = NewCompileUnit(CUW[i], i);
|
|
CompileUnits.push_back(Unit);
|
|
}
|
|
}
|
|
|
|
/// ConstructGlobalDIEs - Create DIEs for each of the externally visible global
|
|
/// variables.
|
|
void DwarfWriter::ConstructGlobalDIEs() {
|
|
std::vector<GlobalVariableDesc *> GlobalVariables =
|
|
DebugInfo->getAnchoredDescriptors<GlobalVariableDesc>(*M);
|
|
|
|
for (unsigned i = 0, N = GlobalVariables.size(); i < N; ++i) {
|
|
GlobalVariableDesc *GVD = GlobalVariables[i];
|
|
NewGlobalVariable(GVD);
|
|
}
|
|
}
|
|
|
|
/// ConstructSubprogramDIEs - Create DIEs for each of the externally visible
|
|
/// subprograms.
|
|
void DwarfWriter::ConstructSubprogramDIEs() {
|
|
std::vector<SubprogramDesc *> Subprograms =
|
|
DebugInfo->getAnchoredDescriptors<SubprogramDesc>(*M);
|
|
|
|
for (unsigned i = 0, N = Subprograms.size(); i < N; ++i) {
|
|
SubprogramDesc *SPD = Subprograms[i];
|
|
NewSubprogram(SPD);
|
|
}
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Main entry points.
|
|
//
|
|
|
|
DwarfWriter::DwarfWriter(std::ostream &OS, AsmPrinter *A,
|
|
const TargetAsmInfo *T)
|
|
: O(OS)
|
|
, Asm(A)
|
|
, TAI(T)
|
|
, TD(Asm->TM.getTargetData())
|
|
, RI(Asm->TM.getRegisterInfo())
|
|
, M(NULL)
|
|
, MF(NULL)
|
|
, DebugInfo(NULL)
|
|
, didInitial(false)
|
|
, shouldEmit(false)
|
|
, SubprogramCount(0)
|
|
, CompileUnits()
|
|
, Abbreviations()
|
|
, StringPool()
|
|
, DescToUnitMap()
|
|
, DescToDieMap()
|
|
, SectionMap()
|
|
, SectionSourceLines()
|
|
{}
|
|
DwarfWriter::~DwarfWriter() {
|
|
for (unsigned i = 0, N = CompileUnits.size(); i < N; ++i) {
|
|
delete CompileUnits[i];
|
|
}
|
|
}
|
|
|
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/// SetDebugInfo - Set DebugInfo when it's known that pass manager has
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/// created it. Set by the target AsmPrinter.
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void DwarfWriter::SetDebugInfo(MachineDebugInfo *DI) {
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// Make sure initial declarations are made.
|
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if (!DebugInfo && DI->hasInfo()) {
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DebugInfo = DI;
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shouldEmit = true;
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|
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// Emit initial sections
|
|
EmitInitial();
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|
|
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// Create all the compile unit DIEs.
|
|
ConstructCompileUnitDIEs();
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|
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// Create DIEs for each of the externally visible global variables.
|
|
ConstructGlobalDIEs();
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|
|
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// Create DIEs for each of the externally visible subprograms.
|
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ConstructSubprogramDIEs();
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|
|
|
// Prime section data.
|
|
SectionMap.insert(std::string("\t") + TAI->getTextSection());
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}
|
|
}
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|
|
|
/// BeginModule - Emit all Dwarf sections that should come prior to the content.
|
|
///
|
|
void DwarfWriter::BeginModule(Module *M) {
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|
this->M = M;
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|
|
|
if (!ShouldEmitDwarf()) return;
|
|
EOL("Dwarf Begin Module");
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|
}
|
|
|
|
/// EndModule - Emit all Dwarf sections that should come after the content.
|
|
///
|
|
void DwarfWriter::EndModule() {
|
|
if (!ShouldEmitDwarf()) return;
|
|
EOL("Dwarf End Module");
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|
|
|
// Standard sections final addresses.
|
|
Asm->SwitchToTextSection(TAI->getTextSection(), 0);
|
|
EmitLabel("text_end", 0);
|
|
Asm->SwitchToDataSection(TAI->getDataSection(), 0);
|
|
EmitLabel("data_end", 0);
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|
|
|
// End text sections.
|
|
for (unsigned i = 1, N = SectionMap.size(); i <= N; ++i) {
|
|
Asm->SwitchToTextSection(SectionMap[i].c_str(), 0);
|
|
EmitLabel("section_end", i);
|
|
}
|
|
|
|
// Compute DIE offsets and sizes.
|
|
SizeAndOffsets();
|
|
|
|
// Emit all the DIEs into a debug info section
|
|
EmitDebugInfo();
|
|
|
|
// Corresponding abbreviations into a abbrev section.
|
|
EmitAbbreviations();
|
|
|
|
// Emit source line correspondence into a debug line section.
|
|
EmitDebugLines();
|
|
|
|
// Emit info into a debug pubnames section.
|
|
EmitDebugPubNames();
|
|
|
|
// Emit info into a debug str section.
|
|
EmitDebugStr();
|
|
|
|
// Emit info into a debug loc section.
|
|
EmitDebugLoc();
|
|
|
|
// Emit info into a debug aranges section.
|
|
EmitDebugARanges();
|
|
|
|
// Emit info into a debug ranges section.
|
|
EmitDebugRanges();
|
|
|
|
// Emit info into a debug macinfo section.
|
|
EmitDebugMacInfo();
|
|
}
|
|
|
|
/// BeginFunction - Gather pre-function debug information. Assumes being
|
|
/// emitted immediately after the function entry point.
|
|
void DwarfWriter::BeginFunction(MachineFunction *MF) {
|
|
this->MF = MF;
|
|
|
|
if (!ShouldEmitDwarf()) return;
|
|
EOL("Dwarf Begin Function");
|
|
|
|
// Begin accumulating function debug information.
|
|
DebugInfo->BeginFunction(MF);
|
|
|
|
// Assumes in correct section after the entry point.
|
|
EmitLabel("func_begin", ++SubprogramCount);
|
|
}
|
|
|
|
/// EndFunction - Gather and emit post-function debug information.
|
|
///
|
|
void DwarfWriter::EndFunction() {
|
|
if (!ShouldEmitDwarf()) return;
|
|
EOL("Dwarf End Function");
|
|
|
|
// Define end label for subprogram.
|
|
EmitLabel("func_end", SubprogramCount);
|
|
|
|
// Get function line info.
|
|
std::vector<SourceLineInfo *> &LineInfos = DebugInfo->getSourceLines();
|
|
|
|
if (!LineInfos.empty()) {
|
|
// Get section line info.
|
|
unsigned ID = SectionMap.insert(Asm->CurrentSection);
|
|
if (SectionSourceLines.size() < ID) SectionSourceLines.resize(ID);
|
|
std::vector<SourceLineInfo *> &SectionLineInfos =SectionSourceLines[ID-1];
|
|
// Append the function info to section info.
|
|
SectionLineInfos.insert(SectionLineInfos.end(),
|
|
LineInfos.begin(), LineInfos.end());
|
|
}
|
|
|
|
// Construct scopes for subprogram.
|
|
ConstructRootScope(DebugInfo->getRootScope());
|
|
|
|
// Emit function frame information.
|
|
EmitFunctionDebugFrame();
|
|
|
|
// Reset the line numbers for the next function.
|
|
LineInfos.clear();
|
|
|
|
// Clear function debug information.
|
|
DebugInfo->EndFunction();
|
|
}
|