mirror of
https://github.com/c64scene-ar/llvm-6502.git
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135633 91177308-0d34-0410-b5e6-96231b3b80d8
533 lines
20 KiB
C++
533 lines
20 KiB
C++
//===-- llvm/CodeGen/DwarfDebug.h - Dwarf Debug Framework ------*- C++ -*--===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// 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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#ifndef CODEGEN_ASMPRINTER_DWARFDEBUG_H__
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#define CODEGEN_ASMPRINTER_DWARFDEBUG_H__
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#include "llvm/CodeGen/AsmPrinter.h"
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#include "llvm/MC/MachineLocation.h"
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#include "llvm/Analysis/DebugInfo.h"
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#include "DIE.h"
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#include "llvm/ADT/DenseMap.h"
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#include "llvm/ADT/FoldingSet.h"
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#include "llvm/ADT/SmallPtrSet.h"
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#include "llvm/ADT/StringMap.h"
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#include "llvm/ADT/UniqueVector.h"
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#include "llvm/Support/Allocator.h"
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#include "llvm/Support/DebugLoc.h"
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namespace llvm {
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class CompileUnit;
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class DbgConcreteScope;
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class DbgScope;
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class DbgVariable;
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class MachineFrameInfo;
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class MachineModuleInfo;
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class MachineOperand;
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class MCAsmInfo;
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class DIEAbbrev;
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class DIE;
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class DIEBlock;
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class DIEEntry;
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//===----------------------------------------------------------------------===//
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/// SrcLineInfo - This class is used to record source line correspondence.
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///
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class SrcLineInfo {
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unsigned Line; // Source line number.
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unsigned Column; // Source column.
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unsigned SourceID; // Source ID number.
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MCSymbol *Label; // Label in code ID number.
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public:
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SrcLineInfo(unsigned L, unsigned C, unsigned S, MCSymbol *label)
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: Line(L), Column(C), SourceID(S), Label(label) {}
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// Accessors
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unsigned getLine() const { return Line; }
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unsigned getColumn() const { return Column; }
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unsigned getSourceID() const { return SourceID; }
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MCSymbol *getLabel() const { return Label; }
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};
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/// DotDebugLocEntry - This struct describes location entries emitted in
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/// .debug_loc section.
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typedef struct DotDebugLocEntry {
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const MCSymbol *Begin;
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const MCSymbol *End;
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MachineLocation Loc;
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const MDNode *Variable;
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bool Merged;
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bool Constant;
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enum EntryType {
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E_Location,
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E_Integer,
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E_ConstantFP,
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E_ConstantInt
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};
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enum EntryType EntryKind;
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union {
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int64_t Int;
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const ConstantFP *CFP;
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const ConstantInt *CIP;
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} Constants;
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DotDebugLocEntry()
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: Begin(0), End(0), Variable(0), Merged(false),
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Constant(false) { Constants.Int = 0;}
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DotDebugLocEntry(const MCSymbol *B, const MCSymbol *E, MachineLocation &L,
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const MDNode *V)
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: Begin(B), End(E), Loc(L), Variable(V), Merged(false),
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Constant(false) { Constants.Int = 0; EntryKind = E_Location; }
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DotDebugLocEntry(const MCSymbol *B, const MCSymbol *E, int64_t i)
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: Begin(B), End(E), Variable(0), Merged(false),
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Constant(true) { Constants.Int = i; EntryKind = E_Integer; }
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DotDebugLocEntry(const MCSymbol *B, const MCSymbol *E, const ConstantFP *FPtr)
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: Begin(B), End(E), Variable(0), Merged(false),
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Constant(true) { Constants.CFP = FPtr; EntryKind = E_ConstantFP; }
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DotDebugLocEntry(const MCSymbol *B, const MCSymbol *E, const ConstantInt *IPtr)
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: Begin(B), End(E), Variable(0), Merged(false),
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Constant(true) { Constants.CIP = IPtr; EntryKind = E_ConstantInt; }
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/// Empty entries are also used as a trigger to emit temp label. Such
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/// labels are referenced is used to find debug_loc offset for a given DIE.
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bool isEmpty() { return Begin == 0 && End == 0; }
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bool isMerged() { return Merged; }
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void Merge(DotDebugLocEntry *Next) {
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if (!(Begin && Loc == Next->Loc && End == Next->Begin))
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return;
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Next->Begin = Begin;
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Merged = true;
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}
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bool isLocation() const { return EntryKind == E_Location; }
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bool isInt() const { return EntryKind == E_Integer; }
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bool isConstantFP() const { return EntryKind == E_ConstantFP; }
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bool isConstantInt() const { return EntryKind == E_ConstantInt; }
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int64_t getInt() { return Constants.Int; }
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const ConstantFP *getConstantFP() { return Constants.CFP; }
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const ConstantInt *getConstantInt() { return Constants.CIP; }
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} DotDebugLocEntry;
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//===----------------------------------------------------------------------===//
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/// DbgVariable - This class is used to track local variable information.
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///
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class DbgVariable {
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DIVariable Var; // Variable Descriptor.
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DIE *TheDIE; // Variable DIE.
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unsigned DotDebugLocOffset; // Offset in DotDebugLocEntries.
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public:
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// AbsVar may be NULL.
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DbgVariable(DIVariable V) : Var(V), TheDIE(0), DotDebugLocOffset(~0U) {}
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// Accessors.
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DIVariable getVariable() const { return Var; }
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void setDIE(DIE *D) { TheDIE = D; }
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DIE *getDIE() const { return TheDIE; }
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void setDotDebugLocOffset(unsigned O) { DotDebugLocOffset = O; }
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unsigned getDotDebugLocOffset() const { return DotDebugLocOffset; }
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StringRef getName() const { return Var.getName(); }
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unsigned getTag() const { return Var.getTag(); }
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bool variableHasComplexAddress() const {
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assert(Var.Verify() && "Invalid complex DbgVariable!");
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return Var.hasComplexAddress();
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}
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bool isBlockByrefVariable() const {
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assert(Var.Verify() && "Invalid complex DbgVariable!");
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return Var.isBlockByrefVariable();
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}
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unsigned getNumAddrElements() const {
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assert(Var.Verify() && "Invalid complex DbgVariable!");
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return Var.getNumAddrElements();
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}
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uint64_t getAddrElement(unsigned i) const {
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return Var.getAddrElement(i);
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}
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DIType getType() const;
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};
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class DwarfDebug {
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/// Asm - Target of Dwarf emission.
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AsmPrinter *Asm;
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/// MMI - Collected machine module information.
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MachineModuleInfo *MMI;
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//===--------------------------------------------------------------------===//
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// Attributes used to construct specific Dwarf sections.
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//
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CompileUnit *FirstCU;
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DenseMap <const MDNode *, CompileUnit *> CUMap;
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/// AbbreviationsSet - Used to uniquely define abbreviations.
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///
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FoldingSet<DIEAbbrev> AbbreviationsSet;
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/// Abbreviations - A list of all the unique abbreviations in use.
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///
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std::vector<DIEAbbrev *> Abbreviations;
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/// SourceIdMap - Source id map, i.e. pair of directory id and source file
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/// id mapped to a unique id.
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StringMap<unsigned> SourceIdMap;
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/// StringPool - A String->Symbol mapping of strings used by indirect
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/// references.
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StringMap<std::pair<MCSymbol*, unsigned> > StringPool;
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unsigned NextStringPoolNumber;
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MCSymbol *getStringPoolEntry(StringRef Str);
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/// SectionMap - Provides a unique id per text section.
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///
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UniqueVector<const MCSection*> SectionMap;
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/// CurrentFnDbgScope - Top level scope for the current function.
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///
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DbgScope *CurrentFnDbgScope;
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/// CurrentFnArguments - List of Arguments (DbgValues) for current function.
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SmallVector<DbgVariable *, 8> CurrentFnArguments;
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/// DbgScopeMap - Tracks the scopes in the current function. Owns the
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/// contained DbgScope*s.
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DenseMap<const MDNode *, DbgScope *> DbgScopeMap;
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/// InlinedDbgScopeMap - Tracks inlined function scopes in current function.
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DenseMap<DebugLoc, DbgScope *> InlinedDbgScopeMap;
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/// AbstractScopes - Tracks the abstract scopes a module. These scopes are
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/// not included DbgScopeMap. AbstractScopes owns its DbgScope*s.
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DenseMap<const MDNode *, DbgScope *> AbstractScopes;
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/// AbstractSPDies - Collection of abstract subprogram DIEs.
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DenseMap<const MDNode *, DIE *> AbstractSPDies;
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/// AbstractScopesList - Tracks abstract scopes constructed while processing
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/// a function. This list is cleared during endFunction().
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SmallVector<DbgScope *, 4>AbstractScopesList;
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/// AbstractVariables - Collection on abstract variables. Owned by the
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/// DbgScopes in AbstractScopes.
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DenseMap<const MDNode *, DbgVariable *> AbstractVariables;
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/// DbgVariableToFrameIndexMap - Tracks frame index used to find
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/// variable's value.
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DenseMap<const DbgVariable *, int> DbgVariableToFrameIndexMap;
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/// DbgVariableToDbgInstMap - Maps DbgVariable to corresponding DBG_VALUE
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/// machine instruction.
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DenseMap<const DbgVariable *, const MachineInstr *> DbgVariableToDbgInstMap;
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/// DotDebugLocEntries - Collection of DotDebugLocEntry.
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SmallVector<DotDebugLocEntry, 4> DotDebugLocEntries;
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/// UseDotDebugLocEntry - DW_AT_location attributes for the DIEs in this set
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/// idetifies corresponding .debug_loc entry offset.
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SmallPtrSet<const DIE *, 4> UseDotDebugLocEntry;
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/// VarToAbstractVarMap - Maps DbgVariable with corresponding Abstract
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/// DbgVariable, if any.
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DenseMap<const DbgVariable *, const DbgVariable *> VarToAbstractVarMap;
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/// InliendSubprogramDIEs - Collection of subprgram DIEs that are marked
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/// (at the end of the module) as DW_AT_inline.
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SmallPtrSet<DIE *, 4> InlinedSubprogramDIEs;
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/// ContainingTypeMap - This map is used to keep track of subprogram DIEs that
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/// need DW_AT_containing_type attribute. This attribute points to a DIE that
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/// corresponds to the MDNode mapped with the subprogram DIE.
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DenseMap<DIE *, const MDNode *> ContainingTypeMap;
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/// InlineInfo - Keep track of inlined functions and their location. This
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/// information is used to populate debug_inlined section.
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typedef std::pair<const MCSymbol *, DIE *> InlineInfoLabels;
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DenseMap<const MDNode *, SmallVector<InlineInfoLabels, 4> > InlineInfo;
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SmallVector<const MDNode *, 4> InlinedSPNodes;
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// ProcessedSPNodes - This is a collection of subprogram MDNodes that
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// are processed to create DIEs.
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SmallPtrSet<const MDNode *, 16> ProcessedSPNodes;
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/// LabelsBeforeInsn - Maps instruction with label emitted before
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/// instruction.
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DenseMap<const MachineInstr *, MCSymbol *> LabelsBeforeInsn;
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/// LabelsAfterInsn - Maps instruction with label emitted after
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/// instruction.
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DenseMap<const MachineInstr *, MCSymbol *> LabelsAfterInsn;
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/// UserVariables - Every user variable mentioned by a DBG_VALUE instruction
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/// in order of appearance.
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SmallVector<const MDNode*, 8> UserVariables;
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/// DbgValues - For each user variable, keep a list of DBG_VALUE
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/// instructions in order. The list can also contain normal instructions that
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/// clobber the previous DBG_VALUE.
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typedef DenseMap<const MDNode*, SmallVector<const MachineInstr*, 4> >
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DbgValueHistoryMap;
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DbgValueHistoryMap DbgValues;
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SmallVector<const MCSymbol *, 8> DebugRangeSymbols;
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/// Previous instruction's location information. This is used to determine
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/// label location to indicate scope boundries in dwarf debug info.
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DebugLoc PrevInstLoc;
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MCSymbol *PrevLabel;
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/// PrologEndLoc - This location indicates end of function prologue and
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/// beginning of function body.
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DebugLoc PrologEndLoc;
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struct FunctionDebugFrameInfo {
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unsigned Number;
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std::vector<MachineMove> Moves;
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FunctionDebugFrameInfo(unsigned Num, const std::vector<MachineMove> &M)
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: Number(Num), Moves(M) {}
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};
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std::vector<FunctionDebugFrameInfo> DebugFrames;
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// DIEValueAllocator - All DIEValues are allocated through this allocator.
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BumpPtrAllocator DIEValueAllocator;
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// Section Symbols: these are assembler temporary labels that are emitted at
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// the beginning of each supported dwarf section. These are used to form
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// section offsets and are created by EmitSectionLabels.
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MCSymbol *DwarfInfoSectionSym, *DwarfAbbrevSectionSym;
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MCSymbol *DwarfStrSectionSym, *TextSectionSym, *DwarfDebugRangeSectionSym;
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MCSymbol *DwarfDebugLocSectionSym;
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MCSymbol *FunctionBeginSym, *FunctionEndSym;
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private:
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/// assignAbbrevNumber - Define a unique number for the abbreviation.
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///
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void assignAbbrevNumber(DIEAbbrev &Abbrev);
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/// getOrCreateDbgScope - Create DbgScope for the scope.
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DbgScope *getOrCreateDbgScope(DebugLoc DL);
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DbgScope *getOrCreateRegularScope(MDNode *Scope);
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DbgScope *getOrCreateInlinedScope(MDNode *Scope, MDNode *InlinedAt);
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DbgScope *getOrCreateAbstractScope(const MDNode *N);
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/// findAbstractVariable - Find abstract variable associated with Var.
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DbgVariable *findAbstractVariable(DIVariable &Var, DebugLoc Loc);
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/// updateSubprogramScopeDIE - Find DIE for the given subprogram and
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/// attach appropriate DW_AT_low_pc and DW_AT_high_pc attributes.
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/// If there are global variables in this scope then create and insert
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/// DIEs for these variables.
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DIE *updateSubprogramScopeDIE(const MDNode *SPNode);
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/// constructLexicalScope - Construct new DW_TAG_lexical_block
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/// for this scope and attach DW_AT_low_pc/DW_AT_high_pc labels.
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DIE *constructLexicalScopeDIE(DbgScope *Scope);
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/// constructInlinedScopeDIE - This scope represents inlined body of
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/// a function. Construct DIE to represent this concrete inlined copy
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/// of the function.
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DIE *constructInlinedScopeDIE(DbgScope *Scope);
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/// constructVariableDIE - Construct a DIE for the given DbgVariable.
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DIE *constructVariableDIE(DbgVariable *DV, DbgScope *S);
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/// constructScopeDIE - Construct a DIE for this scope.
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DIE *constructScopeDIE(DbgScope *Scope);
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/// EmitSectionLabels - Emit initial Dwarf sections with a label at
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/// the start of each one.
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void EmitSectionLabels();
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/// emitDIE - Recusively Emits a debug information entry.
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///
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void emitDIE(DIE *Die);
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/// computeSizeAndOffset - Compute the size and offset of a DIE.
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///
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unsigned computeSizeAndOffset(DIE *Die, unsigned Offset, bool Last);
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/// computeSizeAndOffsets - Compute the size and offset of all the DIEs.
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///
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void computeSizeAndOffsets();
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/// EmitDebugInfo - Emit the debug info section.
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///
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void emitDebugInfo();
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/// emitAbbreviations - Emit the abbreviation section.
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///
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void emitAbbreviations() const;
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/// emitEndOfLineMatrix - Emit the last address of the section and the end of
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/// the line matrix.
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///
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void emitEndOfLineMatrix(unsigned SectionEnd);
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/// emitDebugPubNames - Emit visible names into a debug pubnames section.
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///
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void emitDebugPubNames();
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/// emitDebugPubTypes - Emit visible types into a debug pubtypes section.
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///
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void emitDebugPubTypes();
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/// emitDebugStr - Emit visible names into a debug str section.
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///
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void emitDebugStr();
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/// emitDebugLoc - Emit visible names into a debug loc section.
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///
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void emitDebugLoc();
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/// EmitDebugARanges - Emit visible names into a debug aranges section.
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///
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void EmitDebugARanges();
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/// emitDebugRanges - Emit visible names into a debug ranges section.
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///
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void emitDebugRanges();
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/// emitDebugMacInfo - Emit visible names into a debug macinfo section.
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///
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void emitDebugMacInfo();
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/// emitDebugInlineInfo - Emit inline info using following format.
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/// Section Header:
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/// 1. length of section
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/// 2. Dwarf version number
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/// 3. address size.
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///
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/// Entries (one "entry" for each function that was inlined):
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///
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/// 1. offset into __debug_str section for MIPS linkage name, if exists;
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/// otherwise offset into __debug_str for regular function name.
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/// 2. offset into __debug_str section for regular function name.
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/// 3. an unsigned LEB128 number indicating the number of distinct inlining
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/// instances for the function.
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///
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/// The rest of the entry consists of a {die_offset, low_pc} pair for each
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/// inlined instance; the die_offset points to the inlined_subroutine die in
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/// the __debug_info section, and the low_pc is the starting address for the
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/// inlining instance.
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void emitDebugInlineInfo();
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/// constructCompileUnit - Create new CompileUnit for the given
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/// metadata node with tag DW_TAG_compile_unit.
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void constructCompileUnit(const MDNode *N);
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/// getCompielUnit - Get CompileUnit DIE.
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CompileUnit *getCompileUnit(const MDNode *N) const;
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/// constructGlobalVariableDIE - Construct global variable DIE.
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void constructGlobalVariableDIE(const MDNode *N);
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/// construct SubprogramDIE - Construct subprogram DIE.
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void constructSubprogramDIE(const MDNode *N);
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/// recordSourceLine - Register a source line with debug info. Returns the
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/// unique label that was emitted and which provides correspondence to
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/// the source line list.
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void recordSourceLine(unsigned Line, unsigned Col, const MDNode *Scope,
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unsigned Flags);
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/// recordVariableFrameIndex - Record a variable's index.
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void recordVariableFrameIndex(const DbgVariable *V, int Index);
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/// findVariableFrameIndex - Return true if frame index for the variable
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/// is found. Update FI to hold value of the index.
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bool findVariableFrameIndex(const DbgVariable *V, int *FI);
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/// findDbgScope - Find DbgScope for the debug loc.
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DbgScope *findDbgScope(DebugLoc DL);
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/// identifyScopeMarkers() - Indentify instructions that are marking
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/// beginning of or end of a scope.
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void identifyScopeMarkers();
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/// extractScopeInformation - Scan machine instructions in this function
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/// and collect DbgScopes. Return true, if atleast one scope was found.
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bool extractScopeInformation();
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/// addCurrentFnArgument - If Var is an current function argument that add
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/// it in CurrentFnArguments list.
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bool addCurrentFnArgument(const MachineFunction *MF,
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DbgVariable *Var, DbgScope *Scope);
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/// collectVariableInfo - Populate DbgScope entries with variables' info.
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void collectVariableInfo(const MachineFunction *,
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SmallPtrSet<const MDNode *, 16> &ProcessedVars);
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/// collectVariableInfoFromMMITable - Collect variable information from
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/// side table maintained by MMI.
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void collectVariableInfoFromMMITable(const MachineFunction * MF,
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SmallPtrSet<const MDNode *, 16> &P);
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/// requestLabelBeforeInsn - Ensure that a label will be emitted before MI.
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void requestLabelBeforeInsn(const MachineInstr *MI) {
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LabelsBeforeInsn.insert(std::make_pair(MI, (MCSymbol*)0));
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}
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/// getLabelBeforeInsn - Return Label preceding the instruction.
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const MCSymbol *getLabelBeforeInsn(const MachineInstr *MI);
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|
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|
/// requestLabelAfterInsn - Ensure that a label will be emitted after MI.
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|
void requestLabelAfterInsn(const MachineInstr *MI) {
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|
LabelsAfterInsn.insert(std::make_pair(MI, (MCSymbol*)0));
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|
}
|
|
|
|
/// getLabelAfterInsn - Return Label immediately following the instruction.
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|
const MCSymbol *getLabelAfterInsn(const MachineInstr *MI);
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|
|
|
public:
|
|
//===--------------------------------------------------------------------===//
|
|
// Main entry points.
|
|
//
|
|
DwarfDebug(AsmPrinter *A, Module *M);
|
|
~DwarfDebug();
|
|
|
|
/// beginModule - Emit all Dwarf sections that should come prior to the
|
|
/// content.
|
|
void beginModule(Module *M);
|
|
|
|
/// endModule - Emit all Dwarf sections that should come after the content.
|
|
///
|
|
void endModule();
|
|
|
|
/// beginFunction - Gather pre-function debug information. Assumes being
|
|
/// emitted immediately after the function entry point.
|
|
void beginFunction(const MachineFunction *MF);
|
|
|
|
/// endFunction - Gather and emit post-function debug information.
|
|
///
|
|
void endFunction(const MachineFunction *MF);
|
|
|
|
/// beginInstruction - Process beginning of an instruction.
|
|
void beginInstruction(const MachineInstr *MI);
|
|
|
|
/// endInstruction - Prcess end of an instruction.
|
|
void endInstruction(const MachineInstr *MI);
|
|
|
|
/// GetOrCreateSourceID - Look up the source id with the given directory and
|
|
/// source file names. If none currently exists, create a new id and insert it
|
|
/// in the SourceIds map.
|
|
unsigned GetOrCreateSourceID(StringRef DirName, StringRef FullName);
|
|
|
|
/// createSubprogramDIE - Create new DIE using SP.
|
|
DIE *createSubprogramDIE(DISubprogram SP);
|
|
};
|
|
} // End of namespace llvm
|
|
|
|
#endif
|