diff options
Diffstat (limited to 'include/llvm/DebugInfo/DWARF/DWARFFormValue.h')
| -rw-r--r-- | include/llvm/DebugInfo/DWARF/DWARFFormValue.h | 178 |
1 files changed, 170 insertions, 8 deletions
diff --git a/include/llvm/DebugInfo/DWARF/DWARFFormValue.h b/include/llvm/DebugInfo/DWARF/DWARFFormValue.h index 1b7659dfb04a..c8d7a0c1ac7a 100644 --- a/include/llvm/DebugInfo/DWARF/DWARFFormValue.h +++ b/include/llvm/DebugInfo/DWARF/DWARFFormValue.h @@ -1,4 +1,4 @@ -//===-- DWARFFormValue.h ----------------------------------------*- C++ -*-===// +//===- DWARFFormValue.h -----------------------------------------*- C++ -*-===// // // The LLVM Compiler Infrastructure // @@ -10,13 +10,15 @@ #ifndef LLVM_DEBUGINFO_DWARFFORMVALUE_H #define LLVM_DEBUGINFO_DWARFFORMVALUE_H +#include "llvm/ADT/ArrayRef.h" +#include "llvm/ADT/None.h" #include "llvm/ADT/Optional.h" #include "llvm/Support/DataExtractor.h" #include "llvm/Support/Dwarf.h" +#include <cstdint> namespace llvm { -template <typename T> class ArrayRef; class DWARFUnit; class raw_ostream; @@ -37,7 +39,7 @@ public: private: struct ValueType { - ValueType() : data(nullptr) { + ValueType() { uval = 0; } @@ -46,20 +48,27 @@ private: int64_t sval; const char* cstr; }; - const uint8_t* data; + const uint8_t* data = nullptr; }; dwarf::Form Form; // Form for this value. ValueType Value; // Contains all data for the form. - const DWARFUnit *U; // Remember the DWARFUnit at extract time. + const DWARFUnit *U = nullptr; // Remember the DWARFUnit at extract time. public: - DWARFFormValue(dwarf::Form F = dwarf::Form(0)) : Form(F), U(nullptr) {} + DWARFFormValue(dwarf::Form F = dwarf::Form(0)) : Form(F) {} + dwarf::Form getForm() const { return Form; } void setForm(dwarf::Form F) { Form = F; } void setUValue(uint64_t V) { Value.uval = V; } void setSValue(int64_t V) { Value.sval = V; } void setPValue(const char *V) { Value.cstr = V; } + + void setBlockValue(const ArrayRef<uint8_t> &Data) { + Value.data = Data.data(); + setUValue(Data.size()); + } + bool isFormClass(FormClass FC) const; const DWARFUnit *getUnit() const { return U; } void dump(raw_ostream &OS) const; @@ -72,6 +81,7 @@ public: /// \returns whether the extraction succeeded. bool extractValue(const DataExtractor &Data, uint32_t *OffsetPtr, const DWARFUnit *U); + bool isInlinedCStr() const { return Value.data != nullptr && Value.data == (const uint8_t*)Value.cstr; } @@ -87,6 +97,7 @@ public: Optional<ArrayRef<uint8_t>> getAsBlock() const; Optional<uint64_t> getAsCStringOffset() const; Optional<uint64_t> getAsReferenceUVal() const; + /// Get the fixed byte size for a given form. /// /// If the form always has a fixed valid byte size that doesn't depend on a @@ -105,6 +116,7 @@ public: /// and was needed to calculate the byte size. static Optional<uint8_t> getFixedByteSize(dwarf::Form Form, const DWARFUnit *U = nullptr); + /// Get the fixed byte size for a given form. /// /// If the form has a fixed byte size given a valid DWARF version and address @@ -133,6 +145,7 @@ public: /// \returns true on success, false if the form was not skipped. bool skipValue(DataExtractor debug_info_data, uint32_t *offset_ptr, const DWARFUnit *U) const; + /// Skip a form in \p debug_info_data at offset specified by \p offset_ptr. /// /// Skips the bytes for this form in the debug info and updates the offset. @@ -145,6 +158,7 @@ public: /// \returns true on success, false if the form was not skipped. static bool skipValue(dwarf::Form form, DataExtractor debug_info_data, uint32_t *offset_ptr, const DWARFUnit *U); + /// Skip a form in \p debug_info_data at offset specified by \p offset_ptr. /// /// Skips the bytes for this form in the debug info and updates the offset. @@ -164,6 +178,154 @@ private: void dumpString(raw_ostream &OS) const; }; -} +namespace dwarf { + + /// Take an optional DWARFFormValue and try to extract a string value from it. + /// + /// \param V and optional DWARFFormValue to attempt to extract the value from. + /// \returns an optional value that contains a value if the form value + /// was valid and was a string. + inline Optional<const char*> toString(const Optional<DWARFFormValue>& V) { + if (V) + return V->getAsCString(); + return None; + } + + /// Take an optional DWARFFormValue and extract a string value from it. + /// + /// \param V and optional DWARFFormValue to attempt to extract the value from. + /// \param Default the default value to return in case of failure. + /// \returns the string value or Default if the V doesn't have a value or the + /// form value's encoding wasn't a string. + inline const char* + toString(const Optional<DWARFFormValue>& V, const char *Default) { + return toString(V).getValueOr(Default); + } + + /// Take an optional DWARFFormValue and try to extract an unsigned constant. + /// + /// \param V and optional DWARFFormValue to attempt to extract the value from. + /// \returns an optional value that contains a value if the form value + /// was valid and has a unsigned constant form. + inline Optional<uint64_t> toUnsigned(const Optional<DWARFFormValue>& V) { + if (V) + return V->getAsUnsignedConstant(); + return None; + } + + /// Take an optional DWARFFormValue and extract a unsigned constant. + /// + /// \param V and optional DWARFFormValue to attempt to extract the value from. + /// \param Default the default value to return in case of failure. + /// \returns the extracted unsigned value or Default if the V doesn't have a + /// value or the form value's encoding wasn't an unsigned constant form. + inline uint64_t + toUnsigned(const Optional<DWARFFormValue>& V, uint64_t Default) { + return toUnsigned(V).getValueOr(Default); + } + + /// Take an optional DWARFFormValue and try to extract an reference. + /// + /// \param V and optional DWARFFormValue to attempt to extract the value from. + /// \returns an optional value that contains a value if the form value + /// was valid and has a reference form. + inline Optional<uint64_t> toReference(const Optional<DWARFFormValue>& V) { + if (V) + return V->getAsReference(); + return None; + } + + /// Take an optional DWARFFormValue and extract a reference. + /// + /// \param V and optional DWARFFormValue to attempt to extract the value from. + /// \param Default the default value to return in case of failure. + /// \returns the extracted reference value or Default if the V doesn't have a + /// value or the form value's encoding wasn't a reference form. + inline uint64_t + toReference(const Optional<DWARFFormValue>& V, uint64_t Default) { + return toReference(V).getValueOr(Default); + } + + /// Take an optional DWARFFormValue and try to extract an signed constant. + /// + /// \param V and optional DWARFFormValue to attempt to extract the value from. + /// \returns an optional value that contains a value if the form value + /// was valid and has a signed constant form. + inline Optional<int64_t> toSigned(const Optional<DWARFFormValue>& V) { + if (V) + return V->getAsSignedConstant(); + return None; + } + + /// Take an optional DWARFFormValue and extract a signed integer. + /// + /// \param V and optional DWARFFormValue to attempt to extract the value from. + /// \param Default the default value to return in case of failure. + /// \returns the extracted signed integer value or Default if the V doesn't + /// have a value or the form value's encoding wasn't a signed integer form. + inline int64_t + toSigned(const Optional<DWARFFormValue>& V, int64_t Default) { + return toSigned(V).getValueOr(Default); + } + + /// Take an optional DWARFFormValue and try to extract an address. + /// + /// \param V and optional DWARFFormValue to attempt to extract the value from. + /// \returns an optional value that contains a value if the form value + /// was valid and has a address form. + inline Optional<uint64_t> toAddress(const Optional<DWARFFormValue>& V) { + if (V) + return V->getAsAddress(); + return None; + } + + /// Take an optional DWARFFormValue and extract a address. + /// + /// \param V and optional DWARFFormValue to attempt to extract the value from. + /// \param Default the default value to return in case of failure. + /// \returns the extracted address value or Default if the V doesn't have a + /// value or the form value's encoding wasn't an address form. + inline uint64_t + toAddress(const Optional<DWARFFormValue>& V, uint64_t Default) { + return toAddress(V).getValueOr(Default); + } + + /// Take an optional DWARFFormValue and try to extract an section offset. + /// + /// \param V and optional DWARFFormValue to attempt to extract the value from. + /// \returns an optional value that contains a value if the form value + /// was valid and has a section offset form. + inline Optional<uint64_t> toSectionOffset(const Optional<DWARFFormValue>& V) { + if (V) + return V->getAsSectionOffset(); + return None; + } + + /// Take an optional DWARFFormValue and extract a section offset. + /// + /// \param V and optional DWARFFormValue to attempt to extract the value from. + /// \param Default the default value to return in case of failure. + /// \returns the extracted section offset value or Default if the V doesn't + /// have a value or the form value's encoding wasn't a section offset form. + inline uint64_t + toSectionOffset(const Optional<DWARFFormValue>& V, uint64_t Default) { + return toSectionOffset(V).getValueOr(Default); + } + + /// Take an optional DWARFFormValue and try to extract block data. + /// + /// \param V and optional DWARFFormValue to attempt to extract the value from. + /// \returns an optional value that contains a value if the form value + /// was valid and has a block form. + inline Optional<ArrayRef<uint8_t>> + toBlock(const Optional<DWARFFormValue>& V) { + if (V) + return V->getAsBlock(); + return None; + } + +} // end namespace dwarf + +} // end namespace llvm -#endif +#endif // LLVM_DEBUGINFO_DWARFFORMVALUE_H |