98 lines
3.2 KiB
C++
98 lines
3.2 KiB
C++
//===-- DWARFFormValue.h ----------------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef SymbolFileDWARF_DWARFFormValue_h_
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#define SymbolFileDWARF_DWARFFormValue_h_
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#include "DWARFDataExtractor.h"
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#include <stddef.h> // for NULL
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class DWARFCompileUnit;
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class DWARFFormValue {
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public:
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typedef struct ValueTypeTag {
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ValueTypeTag() : value(), data(NULL) { value.uval = 0; }
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union {
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uint64_t uval;
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int64_t sval;
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const char *cstr;
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} value;
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const uint8_t *data;
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} ValueType;
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class FixedFormSizes {
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public:
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FixedFormSizes() : m_fix_sizes(nullptr), m_size(0) {}
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FixedFormSizes(const uint8_t *fix_sizes, size_t size)
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: m_fix_sizes(fix_sizes), m_size(size) {}
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uint8_t GetSize(uint32_t index) const {
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return index < m_size ? m_fix_sizes[index] : 0;
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}
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bool Empty() const { return m_size == 0; }
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private:
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const uint8_t *m_fix_sizes;
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size_t m_size;
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};
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enum {
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eValueTypeInvalid = 0,
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eValueTypeUnsigned,
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eValueTypeSigned,
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eValueTypeCStr,
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eValueTypeBlock
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};
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DWARFFormValue();
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DWARFFormValue(const DWARFCompileUnit *cu, dw_form_t form);
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const DWARFCompileUnit *GetCompileUnit() const { return m_cu; }
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void SetCompileUnit(const DWARFCompileUnit *cu) { m_cu = cu; }
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dw_form_t Form() const { return m_form; }
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void SetForm(dw_form_t form) { m_form = form; }
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const ValueType &Value() const { return m_value; }
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void Dump(lldb_private::Stream &s) const;
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bool ExtractValue(const lldb_private::DWARFDataExtractor &data,
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lldb::offset_t *offset_ptr);
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const uint8_t *BlockData() const;
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uint64_t Reference() const;
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uint64_t Reference(dw_offset_t offset) const;
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bool Boolean() const { return m_value.value.uval != 0; }
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uint64_t Unsigned() const { return m_value.value.uval; }
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void SetUnsigned(uint64_t uval) { m_value.value.uval = uval; }
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int64_t Signed() const { return m_value.value.sval; }
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void SetSigned(int64_t sval) { m_value.value.sval = sval; }
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const char *AsCString() const;
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dw_addr_t Address() const;
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bool IsValid() const { return m_form != 0; }
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bool SkipValue(const lldb_private::DWARFDataExtractor &debug_info_data,
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lldb::offset_t *offset_ptr) const;
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static bool SkipValue(const dw_form_t form,
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const lldb_private::DWARFDataExtractor &debug_info_data,
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lldb::offset_t *offset_ptr, const DWARFCompileUnit *cu);
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static bool IsBlockForm(const dw_form_t form);
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static bool IsDataForm(const dw_form_t form);
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static FixedFormSizes GetFixedFormSizesForAddressSize(uint8_t addr_size,
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bool is_dwarf64);
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static int Compare(const DWARFFormValue &a, const DWARFFormValue &b);
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void Clear();
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static bool FormIsSupported(dw_form_t form);
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protected:
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const DWARFCompileUnit *m_cu; // Compile unit for this form
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dw_form_t m_form; // Form for this value
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ValueType m_value; // Contains all data for the form
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};
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#endif // SymbolFileDWARF_DWARFFormValue_h_
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