#ifndef LLVM_DEBUGINFO_DWARFFORMVALUE_H
#define LLVM_DEBUGINFO_DWARFFORMVALUE_H
+#include "llvm/ADT/Optional.h"
#include "llvm/Support/DataExtractor.h"
namespace llvm {
class raw_ostream;
class DWARFFormValue {
+public:
+ enum FormClass {
+ FC_Unknown,
+ FC_Address,
+ FC_Block,
+ FC_Constant,
+ FC_String,
+ FC_Flag,
+ FC_Reference,
+ FC_Indirect,
+ FC_SectionOffset,
+ FC_Exprloc
+ };
+
+private:
struct ValueType {
ValueType() : data(NULL) {
uval = 0;
ValueType Value; // Contains all data for the form.
public:
- DWARFFormValue(uint16_t form = 0) : Form(form) {}
+ DWARFFormValue(uint16_t Form = 0) : Form(Form) {}
uint16_t getForm() const { return Form; }
- const ValueType& value() const { return Value; }
+ bool isFormClass(FormClass FC) const;
+
void dump(raw_ostream &OS, const DWARFUnit *U) const;
bool extractValue(DataExtractor data, uint32_t *offset_ptr,
const DWARFUnit *u);
return Value.data != NULL && Value.data == (const uint8_t*)Value.cstr;
}
- uint64_t getReference(const DWARFUnit *U) const;
- uint64_t getUnsigned() const { return Value.uval; }
- int64_t getSigned() const { return Value.sval; }
- const char *getAsCString(const DWARFUnit *U) const;
- uint64_t getAsAddress(const DWARFUnit *U) const;
+ /// getAsFoo functions below return the extracted value as Foo if only
+ /// DWARFFormValue has form class is suitable for representing Foo.
+ Optional<uint64_t> getAsReference(const DWARFUnit *U) const;
+ Optional<uint64_t> getAsUnsignedConstant() const;
+ Optional<const char *> getAsCString(const DWARFUnit *U) const;
+ Optional<uint64_t> getAsAddress(const DWARFUnit *U) const;
+ Optional<uint64_t> getAsSectionOffset() const;
bool skipValue(DataExtractor debug_info_data, uint32_t *offset_ptr,
const DWARFUnit *u) const;