예제 #1
0
/// addPubTypes - Add type for pubtypes section.
void CompileUnit::addPubTypes(DISubprogram SP) {
  DICompositeType SPTy = SP.getType();
  unsigned SPTag = SPTy.getTag();
  if (SPTag != dwarf::DW_TAG_subroutine_type)
    return;

  DIArray Args = SPTy.getTypeArray();
  for (unsigned i = 0, e = Args.getNumElements(); i != e; ++i) {
    DIType ATy(Args.getElement(i));
    if (!ATy.Verify())
      continue;
    addGlobalType(ATy);
  }
}
예제 #2
0
/// PopulateArrayTypeInfo - Populate TypeNo, Aux[] for array from Ty.
void PIC16DbgInfo::PopulateArrayTypeInfo (DIType Ty, unsigned short &TypeNo,
                                          bool &HasAux, int Aux[],
                                          std::string &TagName) {

  DICompositeType CTy = DICompositeType(Ty.getGV());
  DIArray Elements = CTy.getTypeArray();
  unsigned short size = 1;
  unsigned short Dimension[4]={0,0,0,0};
  for (unsigned i = 0, N = Elements.getNumElements(); i < N; ++i) {
    DIDescriptor Element = Elements.getElement(i);
    if (Element.getTag() == dwarf::DW_TAG_subrange_type) {
      TypeNo = TypeNo << PIC16Dbg::S_DERIVED;
      TypeNo = TypeNo | PIC16Dbg::DT_ARY;
      DISubrange SubRange = DISubrange(Element.getGV());
      Dimension[i] = SubRange.getHi() - SubRange.getLo() + 1;
      // Each dimension is represented by 2 bytes starting at byte 9.
      Aux[8+i*2+0] = Dimension[i];
      Aux[8+i*2+1] = Dimension[i] >> 8;
      size = size * Dimension[i];
    }
  }
예제 #3
0
/// constructTypeDIE - Construct type DIE from DICompositeType.
void CompileUnit::constructTypeDIE(DIE &Buffer, DICompositeType CTy) {
  // Get core information.
  StringRef Name = CTy.getName();

  uint64_t Size = CTy.getSizeInBits() >> 3;
  unsigned Tag = CTy.getTag();
  Buffer.setTag(Tag);

  switch (Tag) {
  case dwarf::DW_TAG_vector_type:
  case dwarf::DW_TAG_array_type:
    constructArrayTypeDIE(Buffer, &CTy);
    break;
  case dwarf::DW_TAG_enumeration_type: {
    DIArray Elements = CTy.getTypeArray();

    // Add enumerators to enumeration type.
    for (unsigned i = 0, N = Elements.getNumElements(); i < N; ++i) {
      DIE *ElemDie = NULL;
      DIDescriptor Enum(Elements.getElement(i));
      if (Enum.isEnumerator()) {
        ElemDie = constructEnumTypeDIE(DIEnumerator(Enum));
        Buffer.addChild(ElemDie);
      }
    }
  }
    break;
  case dwarf::DW_TAG_subroutine_type: {
    // Add return type.
    DIArray Elements = CTy.getTypeArray();
    DIDescriptor RTy = Elements.getElement(0);
    addType(&Buffer, DIType(RTy));

    bool isPrototyped = true;
    // Add arguments.
    for (unsigned i = 1, N = Elements.getNumElements(); i < N; ++i) {
      DIDescriptor Ty = Elements.getElement(i);
      if (Ty.isUnspecifiedParameter()) {
        DIE *Arg = new DIE(dwarf::DW_TAG_unspecified_parameters);
        Buffer.addChild(Arg);
        isPrototyped = false;
      } else {
        DIE *Arg = new DIE(dwarf::DW_TAG_formal_parameter);
        addType(Arg, DIType(Ty));
        Buffer.addChild(Arg);
      }
    }
    // Add prototype flag.
    if (isPrototyped)
      addUInt(&Buffer, dwarf::DW_AT_prototyped, dwarf::DW_FORM_flag, 1);
  }
    break;
  case dwarf::DW_TAG_structure_type:
  case dwarf::DW_TAG_union_type:
  case dwarf::DW_TAG_class_type: {
    // Add elements to structure type.
    DIArray Elements = CTy.getTypeArray();

    // A forward struct declared type may not have elements available.
    unsigned N = Elements.getNumElements();
    if (N == 0)
      break;

    // Add elements to structure type.
    for (unsigned i = 0; i < N; ++i) {
      DIDescriptor Element = Elements.getElement(i);
      DIE *ElemDie = NULL;
      if (Element.isSubprogram()) {
        DISubprogram SP(Element);
        ElemDie = DD->createSubprogramDIE(DISubprogram(Element));
        if (SP.isProtected())
          addUInt(ElemDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_flag,
                  dwarf::DW_ACCESS_protected);
        else if (SP.isPrivate())
          addUInt(ElemDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_flag,
                  dwarf::DW_ACCESS_private);
        else 
          addUInt(ElemDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_flag,
            dwarf::DW_ACCESS_public);
        if (SP.isExplicit())
          addUInt(ElemDie, dwarf::DW_AT_explicit, dwarf::DW_FORM_flag, 1);
      }
      else if (Element.isVariable()) {
        DIVariable DV(Element);
        ElemDie = new DIE(dwarf::DW_TAG_variable);
        addString(ElemDie, dwarf::DW_AT_name, dwarf::DW_FORM_string,
                  DV.getName());
        addType(ElemDie, DV.getType());
        addUInt(ElemDie, dwarf::DW_AT_declaration, dwarf::DW_FORM_flag, 1);
        addUInt(ElemDie, dwarf::DW_AT_external, dwarf::DW_FORM_flag, 1);
        addSourceLine(ElemDie, DV);
      } else if (Element.isDerivedType())
        ElemDie = createMemberDIE(DIDerivedType(Element));
      else
        continue;
      Buffer.addChild(ElemDie);
    }

    if (CTy.isAppleBlockExtension())
      addUInt(&Buffer, dwarf::DW_AT_APPLE_block, dwarf::DW_FORM_flag, 1);

    unsigned RLang = CTy.getRunTimeLang();
    if (RLang)
      addUInt(&Buffer, dwarf::DW_AT_APPLE_runtime_class,
              dwarf::DW_FORM_data1, RLang);

    DICompositeType ContainingType = CTy.getContainingType();
    if (DIDescriptor(ContainingType).isCompositeType())
      addDIEEntry(&Buffer, dwarf::DW_AT_containing_type, dwarf::DW_FORM_ref4,
                  getOrCreateTypeDIE(DIType(ContainingType)));
    else {
      DIDescriptor Context = CTy.getContext();
      addToContextOwner(&Buffer, Context);
    }

    if (CTy.isObjcClassComplete())
      addUInt(&Buffer, dwarf::DW_AT_APPLE_objc_complete_type,
              dwarf::DW_FORM_flag, 1);

    if (Tag == dwarf::DW_TAG_class_type) 
      addTemplateParams(Buffer, CTy.getTemplateParams());

    break;
  }
  default:
    break;
  }

  // Add name if not anonymous or intermediate type.
  if (!Name.empty())
    addString(&Buffer, dwarf::DW_AT_name, dwarf::DW_FORM_string, Name);

  if (Tag == dwarf::DW_TAG_enumeration_type || Tag == dwarf::DW_TAG_class_type
      || Tag == dwarf::DW_TAG_structure_type || Tag == dwarf::DW_TAG_union_type)
    {
    // Add size if non-zero (derived types might be zero-sized.)
    if (Size)
      addUInt(&Buffer, dwarf::DW_AT_byte_size, 0, Size);
    else {
      // Add zero size if it is not a forward declaration.
      if (CTy.isForwardDecl())
        addUInt(&Buffer, dwarf::DW_AT_declaration, dwarf::DW_FORM_flag, 1);
      else
        addUInt(&Buffer, dwarf::DW_AT_byte_size, 0, 0);
    }

    // Add source line info if available.
    if (!CTy.isForwardDecl())
      addSourceLine(&Buffer, CTy);
  }
}
예제 #4
0
/// addBlockByrefAddress - Start with the address based on the location
/// provided, and generate the DWARF information necessary to find the
/// actual Block variable (navigating the Block struct) based on the
/// starting location.  Add the DWARF information to the die.  For
/// more information, read large comment just above here.
///
void CompileUnit::addBlockByrefAddress(DbgVariable *&DV, DIE *Die,
                                       unsigned Attribute,
                                       const MachineLocation &Location) {
  DIType Ty = DV->getType();
  DIType TmpTy = Ty;
  unsigned Tag = Ty.getTag();
  bool isPointer = false;

  StringRef varName = DV->getName();

  if (Tag == dwarf::DW_TAG_pointer_type) {
    DIDerivedType DTy = DIDerivedType(Ty);
    TmpTy = DTy.getTypeDerivedFrom();
    isPointer = true;
  }

  DICompositeType blockStruct = DICompositeType(TmpTy);

  // Find the __forwarding field and the variable field in the __Block_byref
  // struct.
  DIArray Fields = blockStruct.getTypeArray();
  DIDescriptor varField = DIDescriptor();
  DIDescriptor forwardingField = DIDescriptor();

  for (unsigned i = 0, N = Fields.getNumElements(); i < N; ++i) {
    DIDescriptor Element = Fields.getElement(i);
    DIDerivedType DT = DIDerivedType(Element);
    StringRef fieldName = DT.getName();
    if (fieldName == "__forwarding")
      forwardingField = Element;
    else if (fieldName == varName)
      varField = Element;
  }

  // Get the offsets for the forwarding field and the variable field.
  unsigned forwardingFieldOffset =
    DIDerivedType(forwardingField).getOffsetInBits() >> 3;
  unsigned varFieldOffset =
    DIDerivedType(varField).getOffsetInBits() >> 3;

  // Decode the original location, and use that as the start of the byref
  // variable's location.
  const TargetRegisterInfo *RI = Asm->TM.getRegisterInfo();
  unsigned Reg = RI->getDwarfRegNum(Location.getReg(), false);
  DIEBlock *Block = new (DIEValueAllocator) DIEBlock();

  if (Location.isReg()) {
    if (Reg < 32)
      addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_reg0 + Reg);
    else {
      addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_regx);
      addUInt(Block, 0, dwarf::DW_FORM_udata, Reg);
    }
  } else {
    if (Reg < 32)
      addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_breg0 + Reg);
    else {
      addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_bregx);
      addUInt(Block, 0, dwarf::DW_FORM_udata, Reg);
    }

    addUInt(Block, 0, dwarf::DW_FORM_sdata, Location.getOffset());
  }

  // If we started with a pointer to the __Block_byref... struct, then
  // the first thing we need to do is dereference the pointer (DW_OP_deref).
  if (isPointer)
    addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_deref);

  // Next add the offset for the '__forwarding' field:
  // DW_OP_plus_uconst ForwardingFieldOffset.  Note there's no point in
  // adding the offset if it's 0.
  if (forwardingFieldOffset > 0) {
    addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_plus_uconst);
    addUInt(Block, 0, dwarf::DW_FORM_udata, forwardingFieldOffset);
  }

  // Now dereference the __forwarding field to get to the real __Block_byref
  // struct:  DW_OP_deref.
  addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_deref);

  // Now that we've got the real __Block_byref... struct, add the offset
  // for the variable's field to get to the location of the actual variable:
  // DW_OP_plus_uconst varFieldOffset.  Again, don't add if it's 0.
  if (varFieldOffset > 0) {
    addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_plus_uconst);
    addUInt(Block, 0, dwarf::DW_FORM_udata, varFieldOffset);
  }

  // Now attach the location information to the DIE.
  addBlock(Die, Attribute, 0, Block);
}