예제 #1
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 #2
0
/// constructSubrangeDIE - Construct subrange DIE from DISubrange.
void CompileUnit::constructSubrangeDIE(DIE &Buffer, DISubrange SR, DIE *IndexTy){
  DIE *DW_Subrange = new DIE(dwarf::DW_TAG_subrange_type);
  addDIEEntry(DW_Subrange, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, IndexTy);
  int64_t L = SR.getLo();
  int64_t H = SR.getHi();

  // The L value defines the lower bounds which is typically zero for C/C++. The
  // H value is the upper bounds.  Values are 64 bit.  H - L + 1 is the size
  // of the array. If L > H then do not emit DW_AT_lower_bound and 
  // DW_AT_upper_bound attributes. If L is zero and H is also zero then the
  // array has one element and in such case do not emit lower bound.

  if (L > H) {
    Buffer.addChild(DW_Subrange);
    return;
  }
  if (L)
    addSInt(DW_Subrange, dwarf::DW_AT_lower_bound, 0, L);
  addSInt(DW_Subrange, dwarf::DW_AT_upper_bound, 0, H);
  Buffer.addChild(DW_Subrange);
}