#include "llvm/ADT/FoldingSet.h"
#include "llvm/ADT/SmallVector.h"
-#include "llvm/MC/MCExpr.h"
-#include "llvm/Support/Compiler.h"
#include "llvm/Support/Dwarf.h"
#include <vector>
namespace llvm {
class AsmPrinter;
+class MCExpr;
class MCSymbol;
-class MCSymbolRefExpr;
class raw_ostream;
class DwarfTypeUnit;
/// Children DIEs.
///
- std::vector<DIE *> Children;
+ // This can't be a vector<DIE> because pointer validity is requirent for the
+ // Parent pointer and DIEEntry.
+ // It can't be a list<DIE> because some clients need pointer validity before
+ // the object has been added to any child list
+ // (eg: DwarfUnit::constructVariableDIE). These aren't insurmountable, but may
+ // be more convoluted than beneficial.
+ std::vector<std::unique_ptr<DIE>> Children;
DIE *Parent;
///
SmallVector<DIEValue *, 12> Values;
+protected:
+ DIE()
+ : Offset(0), Size(0), Abbrev((dwarf::Tag)0, dwarf::DW_CHILDREN_no),
+ Parent(nullptr) {}
+
public:
- explicit DIE(unsigned Tag)
+ explicit DIE(dwarf::Tag Tag)
: Offset(0), Size(0), Abbrev((dwarf::Tag)Tag, dwarf::DW_CHILDREN_no),
- Parent(0) {}
- ~DIE();
+ Parent(nullptr) {}
// Accessors.
DIEAbbrev &getAbbrev() { return Abbrev; }
dwarf::Tag getTag() const { return Abbrev.getTag(); }
unsigned getOffset() const { return Offset; }
unsigned getSize() const { return Size; }
- const std::vector<DIE *> &getChildren() const { return Children; }
+ const std::vector<std::unique_ptr<DIE>> &getChildren() const {
+ return Children;
+ }
const SmallVectorImpl<DIEValue *> &getValues() const { return Values; }
DIE *getParent() const { return Parent; }
/// Climb up the parent chain to get the compile or type unit DIE this DIE
/// addChild - Add a child to the DIE.
///
- void addChild(DIE *Child) {
+ void addChild(std::unique_ptr<DIE> Child) {
assert(!Child->getParent());
Abbrev.setChildrenFlag(dwarf::DW_CHILDREN_yes);
- Children.push_back(Child);
Child->Parent = this;
+ Children.push_back(std::move(Child));
}
/// findAttribute - Find a value in the DIE with the attribute given,
/// this class can also be used as a proxy for a debug information entry not
/// yet defined (ie. types.)
class DIEEntry : public DIEValue {
- DIE *const Entry;
+ DIE &Entry;
public:
- explicit DIEEntry(DIE *E) : DIEValue(isEntry), Entry(E) {
- assert(E && "Cannot construct a DIEEntry with a null DIE");
+ explicit DIEEntry(DIE &E) : DIEValue(isEntry), Entry(E) {
}
- DIE *getEntry() const { return Entry; }
+ DIE &getEntry() const { return Entry; }
/// EmitValue - Emit debug information entry offset.
///
class DIELoc : public DIEValue, public DIE {
mutable unsigned Size; // Size in bytes excluding size header.
public:
- DIELoc() : DIEValue(isLoc), DIE(0), Size(0) {}
+ DIELoc() : DIEValue(isLoc), Size(0) {}
/// ComputeSize - Calculate the size of the location expression.
///
class DIEBlock : public DIEValue, public DIE {
mutable unsigned Size; // Size in bytes excluding size header.
public:
- DIEBlock() : DIEValue(isBlock), DIE(0), Size(0) {}
+ DIEBlock() : DIEValue(isBlock), Size(0) {}
/// ComputeSize - Calculate the size of the location expression.
///