IDiaSymbol

Applies to: Visual Studio Visual Studio for Mac Visual Studio Code

Describes the properties of a symbol instance.

Syntax

IDiaSymbol : IUnknown

Methods in Alphabetical Order

The following table shows the methods of IDiaSymbol.

Note

Symbols will return meaningful data for only some of these methods, depending on the type of symbol. If a method returns S_OK, then that method has returned meaningful data.

Method	Description
IDiaSymbol::findChildren	Retrieves all children of the symbol.
IDiaSymbol::findChildrenEx	Retrieves the children of the symbol. This method is the extended version of IDiaSymbol::findChildren.
IDiaSymbol::findChildrenExByAddr	Retrieves the children of the symbol that are valid at a specified address.
IDiaSymbol::findChildrenExByRVA	Retrieves the children of the symbol that are valid at a specified relative virtual address (RVA).
IDiaSymbol::findChildrenExByVA	Retrieves the children of the symbol that are valid at a specified virtual address.
IDiaSymbol::findInlineFramesByAddr	Retrieves an enumeration that allows a client to iterate through all of the inline frames on a given address.
IDiaSymbol::findInlineFramesByRVA	Retrieves an enumeration that allows a client to iterate through all of the inline frames on a specified relative virtual address (RVA).
IDiaSymbol::findInlineFramesByVA	Retrieves an enumeration that allows a client to iterate through all of the inline frames on a specified virtual address (VA).
IDiaSymbol::findInlineeLines	Retrieves an enumeration that allows a client to iterate through the line number information of all functions that are inlined, directly or indirectly, in this symbol.
IDiaSymbol::findInlineeLinesByAddr	Retrieves an enumeration that allows a client to iterate through the line number information of all functions that are inlined, directly or indirectly, in this symbol within the specified address range.
IDiaSymbol::findInlineeLinesByRVA	Retrieves an enumeration that allows a client to iterate through the line number information of all functions that are inlined, directly or indirectly, in this symbol within the specified relative virtual address (RVA).
IDiaSymbol::findInlineeLinesByVA	Retrieves an enumeration that allows a client to iterate through the line number information of all functions that are inlined, directly or indirectly, in this symbol within the specified virtual address (VA).
IDiaSymbol::findSymbolsByRVAForAcceleratorPointerTag	Given a corresponding tag value, this method returns an enumeration of symbols that are contained in this stub function at a specified relative virtual address.
IDiaSymbol::findSymbolsForAcceleratorPointerTag	Returns the number of accelerator pointer tags in a C++ AMP stub function.
IDiaSymbol::get_acceleratorPointerTags	Returns all accelerator pointer tag values that correspond to a C++ AMP accelerator stub function.
IDiaSymbol::get_access	Retrieves the access modifier of a class member.
IDiaSymbol::get_addressOffset	Retrieves the offset part of an address location.
IDiaSymbol::get_addressSection	Retrieves the section part of an address location.
IDiaSymbol::get_addressTaken	Retrieves a flag indicating whether another symbol references this address.
IDiaSymbol::get_age	Retrieves the age value of a program database.
IDiaSymbol::get_arrayIndexType	Retrieves the symbol identifier of the array index type.
IDiaSymbol::get_arrayIndexTypeId	Retrieves the array index type identifier of the symbol.
IDiaSymbol::get_backEndMajor	Retrieves the back-end major version number.
IDiaSymbol::get_backEndMinor	Retrieves the back-end minor version number.
IDiaSymbol::get_backEndBuild	Retrieves the back-end build number.
IDiaSymbol::get_baseDataOffset	Retrieves the base data offset.
IDiaSymbol::get_baseDataSlot	Retrieves the base data slot.
IDiaSymbol::get_baseSymbol	Retrieves the symbol from which the pointer is based.
IDiaSymbol::get_baseSymbolId	Retrieves the symbol ID from which the pointer is based.
IDiaSymbol::get_baseType	Retrieves the type tag of a simple type.
IDiaSymbol::get_bitPosition	Retrieves the bit position of a location.
IDiaSymbol::get_builtInKind	Retrieves a built-in kind of the HLSL type.
IDiaSymbol::get_callingConvention	Returns an indicator of a method's calling convention.
IDiaSymbol::get_classParent	Retrieves a reference to the class parent of the symbol.
IDiaSymbol::get_classParentId	Retrieves the class parent identifier of the symbol.
IDiaSymbol::get_code	Retrieves a flag indicating whether the symbol refers to a code address.
IDiaSymbol::get_compilerGenerated	Retrieves a flag indicating whether the symbol was compiler-generated.
IDiaSymbol::get_compilerName	Retrieves the name of the compiler used to create the Compiland.
IDiaSymbol::get_constructor	Retrieves a flag indicating whether the user-defined data type has a constructor.
IDiaSymbol::get_container	Retrieves the containing symbol of this symbol.
IDiaSymbol::get_constType	Retrieves a flag indicating whether the user-defined data type is constant.
IDiaSymbol::get_count	Retrieves the number of items in a list or array.
IDiaSymbol::get_countLiveRanges	Retrieves the number of valid address ranges associated with the local symbol.
IDiaSymbol::get_customCallingConvention	Retrieves a flag indicating whether the function uses a custom calling convention.
IDiaSymbol::get_dataBytes	Retrieves the data bytes of an OEM symbol.
IDiaSymbol::get_dataKind	Retrieves the variable classification of a data symbol.
IDiaSymbol::get_editAndContinueEnabled	Retrieves the flag describing the Edit and Continue features of the compiled program or unit.
IDiaSymbol::get_farReturn	Retrieves a flag indicating whether the function uses a far return.
IDiaSymbol::get_frontEndMajor	Retrieves the front-end major version number.
IDiaSymbol::get_frontEndMinor	Retrieves the front-end minor version number.
IDiaSymbol::get_frontEndBuild	Retrieves the front-end build number.
IDiaSymbol::get_function	Retrieves a flag indicating whether the public symbol refers to a function.
IDiaSymbol::get_guid	Retrieves the symbol's GUID.
IDiaSymbol::get_hasAlloca	Retrieves a flag indicating whether the function contains a call to alloca.
IDiaSymbol::get_hasAssignmentOperator	Retrieves a flag indicating whether the user-defined data type has any assignment operators defined.
IDiaSymbol::get_hasCastOperator	Retrieves a flag indicating whether the user-defined data type has any cast operators defined.
IDiaSymbol::get_hasDebugInfo	Retrieves a flag indicating whether the compiland contains any debugging information.
IDiaSymbol::get_hasEH	Retrieves a flag indicating whether the function has a C++-style exception handler.
IDiaSymbol::get_hasEHa	Retrieves a flag indicating whether the function has an asynchronous exception handler.
IDiaSymbol::get_hasInlAsm	Retrieves a flag indicating whether the function has inline assembly.
IDiaSymbol::get_hasLongJump	Retrieves a flag indicating whether the function contains a longjmp command (part of C-style exception handling).
IDiaSymbol::get_hasManagedCode	Retrieves a flag indicating whether the module contains managed code.
IDiaSymbol::get_hasNestedTypes	Retrieves a flag indicating whether the user-defined data type has nested type definitions.
IDiaSymbol::get_hasSecurityChecks	Retrieves a flag indicating whether the function or compiland has security checks compiled in (via the /GS (Buffer Security Check) compiler switch).
IDiaSymbol::get_hasSEH	Retrieves a flag indicating whether the function has Win32-style Structured Exception Handling.
IDiaSymbol::get_hasSetJump	Retrieves a flag indicating whether the function contains a setjmp command.
IDiaSymbol::get_indirectVirtualBaseClass	Retrieves a flag indicating whether the user-defined data type is an indirect virtual base class.
IDiaSymbol::get_InlSpec	Retrieves a flag indicating whether the function has been marked with the inline attribute.
IDiaSymbol::get_interruptReturn	Retrieves a flag indicating whether the function has a return from interrupt instruction.
IDiaSymbol::get_intro	Retrieves a flag indicating whether the function is the base class virtual function.
IDiaSymbol::get_isAcceleratorGroupSharedLocal	Retrieves a flag that indicates whether the symbol corresponds to a group shared local variable in code compiled for a C++ AMP Accelerator.
IDiaSymbol::get_isAcceleratorPointerTagLiveRange	Retrieves a flag that indicates whether the symbol corresponds to the definition range symbol for the tag component of a pointer variable in code compiled for a C++ AMP Accelerator. The definition range symbol is the location of a variable for a span of addresses.
IDiaSymbol::get_isAcceleratorStubFunction	Indicates whether the symbol corresponds to a top-level function symbol for a shader compiled for an accelerator that corresponds to a parallel_for_each call.
IDiaSymbol::get_isAggregated	Retrieves a flag indicating whether the data is part of an aggregate of many symbols.
IDiaSymbol::get_isCTypes	Retrieves a flag indicating whether the symbol file contains C types.
IDiaSymbol::get_isCVTCIL	Retrieves a flag indicating whether the module was converted from Common Intermediate Language (CIL) to native code.
IDiaSymbol::get_isDataAligned	Retrieves a flag indicating whether the elements of a user-defined data type are aligned to a specific boundary.
IDiaSymbol::get_isHLSLData	Specifies whether this symbol represents High Level Shader Language (HLSL) data.
IDiaSymbol::get_isHotpatchable	Retrieves a flag indicating whether the module was compiled with the /hotpatch (Create Hotpatchable Image) compiler switch.
IDiaSymbol::get_isLTCG	Retrieves a flag indicating whether the managed compiland was linked with the linker's LTCG.
IDiaSymbol::get_isMatrixRowMajor	Specifies whether the matrix is row major.
IDiaSymbol::get_isMSILNetmodule	Retrieves a flag indicating whether the managed compiland is a .netmodule (containing only metadata).
IDiaSymbol::get_isMultipleInheritance	Specifies whether the this pointer points to a data member with multiple inheritance.
IDiaSymbol::get_isNaked	Retrieves a flag indicating whether the function has the naked attribute.
IDiaSymbol::get_isOptimizedAway	Specifies whether the variable is optimized away.
IDiaSymbol::get_isPointerBasedOnSymbolValue	Specifies whether the this pointer is based on a symbol value.
IDiaSymbol::get_isPointerToDataMember	Specifies whether this symbol is a pointer to a data member.
IDiaSymbol::get_isPointerToMemberFunction	Specifies whether this symbol is a pointer to a member function.
IDiaSymbol::get_isReturnValue	Specifies whether the variable carries a return value.
IDiaSymbol::get_isSdl	Specifies whether the module is compiled with the /SDL option.
IDiaSymbol::get_isSingleInheritance	Specifies whether the this pointer points to a data member with single inheritance.
IDiaSymbol::get_isSplitted	Retrieves a flag indicating whether the data has been split into an aggregate of separate symbols.
IDiaSymbol::get_isStatic	Retrieves a flag indicating whether a function or thunk layer is static.
IDiaSymbol::get_isStripped	Retrieves a flag indicating whether private symbols have been stripped from the symbol file.
IDiaSymbol::get_isVirtualInheritance	Specifies whether the this pointer points to a data member with virtual inheritance.
IDiaSymbol::get_language	Retrieves the language of the source.
IDiaSymbol::get_length	Retrieves the number of bytes of memory used by the object represented by this symbol.
IDiaSymbol::get_lexicalParent	Retrieves a reference to the lexical parent of the symbol.
IDiaSymbol::get_lexicalParentId	Retrieves the lexical parent identifier of the symbol.
IDiaSymbol::get_libraryName	Retrieves the file name of the library or object file from which the object was loaded.
IDiaSymbol::get_liveRangeLength	Returns the length of the address range in which the local symbol is valid.
IDiaSymbol::get_liveRangeStartAddressSection	Returns the section part of the starting address range in which the local symbol is valid.
IDiaSymbol::get_liveRangeStartAddressOffset	Returns the offset part of the starting address range in which the local symbol is valid.
IDiaSymbol::get_liveRangeStartRelativeVirtualAddress	Returns the start of the address range in which the local symbol is valid.
IDiaSymbol::get_locationType	Retrieves the location type of a data symbol.
IDiaSymbol::get_lowerBound	Retrieves the lower bound of a FORTRAN array dimension.
IDiaSymbol::get_lowerBoundId	Retrieves the symbol identifier of the lower bound of a FORTRAN array dimension.
IDiaSymbol::get_machineType	Retrieves the type of the target CPU.
IDiaSymbol::get_managed	Retrieves a flag that indicating whether the symbol refers to managed code.
IDiaSymbol::get_memorySpaceKind	Retrieves the memory space kind.
IDiaSymbol::get_msil	Retrieves a flag indicating whether the symbol refers to Microsoft Intermediate Language (MSIL) code.
IDiaSymbol::get_name	Retrieves the name of the symbol.
IDiaSymbol::get_nested	Retrieves a flag indicating whether the user-defined data type is nested.
IDiaSymbol::get_noInline	Retrieves a flag indicating whether the function is marked with the noinline attribute.
IDiaSymbol::get_noReturn	Retrieves a flag indicating whether the function has been declared with the noreturn attribute.
IDiaSymbol::get_noStackOrdering	Retrieves a flag indicating whether no stack ordering could be done as part of stack buffer checking.
IDiaSymbol::get_notReached	Retrieves a flag indicating whether the function or label is never reached.
IDiaSymbol::get_numberOfAcceleratorPointerTags	Returns the number of accelerator pointer tags in a C++ AMP stub function.
IDiaSymbol::get_numberOfModifiers	Retrieves the number of modifiers that are applied to the original type.
IDiaSymbol::get_numberOfRegisterIndices	Retrieves the number of register indices.
IDiaSymbol::get_numberOfRows	Retrieves the number of rows in the matrix.
IDiaSymbol::get_numberOfColumns	Retrieves the number of columns in the matrix.
IDiaSymbol::get_objectFileName	Retrieves the object file name.
IDiaSymbol::get_objectPointerType	Retrieves the type of the object pointer for a class method.
IDiaSymbol::get_oemId	Retrieves the symbol's oemId value.
IDiaSymbol::get_oemSymbolId	Retrieves the symbol's oemSymbolId value.
IDiaSymbol::get_offset	Retrieves the offset of the symbol location.
IDiaSymbol::get_optimizedCodeDebugInfo	Retrieves a flag indicating whether the function or label contains optimized code as well as debug information.
IDiaSymbol::get_overloadedOperator	Retrieves a flag indicating whether the user-defined data type has overloaded operators.
IDiaSymbol::get_packed	Retrieves a flag indicating whether the user-defined data type is packed.
IDiaSymbol::get_platform	Retrieves the platform type for which the program or compiland was compiled.
IDiaSymbol::get_pure	Retrieves a flag that indicating whether the function is pure virtual.
IDiaSymbol::get_rank	Retrieves the rank of a FORTRAN multidimensional array.
IDiaSymbol::get_reference	Retrieves a flag indicating whether a pointer type is a reference.
IDiaSymbol::get_registerId	Retrieves the register designator of the location.
IDiaSymbol::get_registerType	Retrieves the register type.
IDiaSymbol::get_relativeVirtualAddress	Retrieves the relative virtual address (RVA) of the location.
IDiaSymbol::get_restrictedType	Specifies whether the this pointer is flagged as restricted.
IDiaSymbol::get_samplerSlot	Retrieves the sampler slot.
IDiaSymbol::get_scoped	Retrieves a flag indicating whether the user-defined data type appears in a nonglobal lexical scope.
IDiaSymbol::get_signature	Retrieves the symbol's signature value.
IDiaSymbol::get_sizeInUdt	Retrieves the size of a member of a user-defined type.
IDiaSymbol::get_slot	Retrieves the slot number of the location.
IDiaSymbol::get_sourceFileName	Retrieves the file name of the source file.
IDiaSymbol::getSrcLineOnTypeDefn	Retrieves the source file and line number that indicate where a specified user-defined type is defined.
IDiaSymbol::get_stride	Retrieves the stride of the matrix or strided array.
IDiaSymbol::get_subType	Retrieves the sub type.
IDiaSymbol::get_subTypeId	Retrieves the sub type ID.
IDiaSymbol::get_symbolsFileName	Retrieves the name of the file from which the symbols were loaded.
IDiaSymbol::get_symIndexId	Retrieves the unique symbol identifier.
IDiaSymbol::get_symTag	Retrieves the symbol type classifier.
IDiaSymbol::get_targetOffset	Retrieves the offset section of a thunk target.
IDiaSymbol::get_targetRelativeVirtualAddress	Retrieves the relative virtual address (RVA) of a thunk target.
IDiaSymbol::get_targetSection	Retrieves the address section of a thunk target.
IDiaSymbol::get_targetVirtualAddress	Retrieves the virtual address (VA) of a thunk target.
IDiaSymbol::get_textureSlot	Retrieves the texture slot.
IDiaSymbol::get_thisAdjust	Retrieves the logical this adjustor for the method.
IDiaSymbol::get_thunkOrdinal	Retrieves the thunk type of a function.
IDiaSymbol::get_timeStamp	Retrieves the timestamp of the underlying executable file.
IDiaSymbol::get_token	Retrieves the metadata token of a managed function or variable.
IDiaSymbol::get_type	Retrieves a reference to the function signature.
IDiaSymbol::get_typeId	Retrieves the type identifier of the symbol.
IDiaSymbol::get_types	Retrieves an array of compiler-specific type values for this symbol.
IDiaSymbol::get_typeIds	Retrieves an array of compiler-specific type identifier values for this symbol.
IDiaSymbol::get_uavSlot	Retrieves the uav slot.
IDiaSymbol::get_udtKind	Retrieves the variety of a user-defined type (UDT).
IDiaSymbol::get_unalignedType	Retrieves a flag indicating whether the user-defined data type is unaligned.
IDiaSymbol::get_undecoratedName	Retrieves the undecorated name for a C++ decorated, or linkage, name.
IDiaSymbol::get_undecoratedNameEx	Extension of the get_undecoratedName method that retrieves the undecorated name based on the value of an extension field.
IDiaSymbol::get_unmodifiedTypeId	Retrieves the ID of the original (unmodified) type.
IDiaSymbol::get_upperBound	Retrieves the upper bound of a FORTRAN array dimension.
IDiaSymbol::get_upperBoundId	Retrieves the symbol identifier of the upper bound of a FORTRAN array dimension.
IDiaSymbol::get_value	Retrieves the value of a constant.
IDiaSymbol::get_virtual	Retrieves a flag indicating whether the function is virtual.
IDiaSymbol::get_virtualAddress	Retrieves the virtual address (VA) of the location.
IDiaSymbol::get_virtualBaseClass	Retrieves a flag indicating whether the user-defined data type is a virtual base class.
IDiaSymbol::get_virtualBaseDispIndex	Retrieves the index to the virtual base displacement table.
IDiaSymbol::get_virtualBaseOffset	Retrieves the offset in the virtual function table of a virtual function.
IDiaSymbol::get_virtualBasePointerOffset	Retrieves the offset of the virtual base pointer.
IDiaSymbol::get_virtualBaseTableType	Retrieves the type of a virtual base table pointer.
IDiaSymbol::get_virtualTableShape	Retrieves the symbol interface of the type of the virtual table for a user-defined type.
IDiaSymbol::get_virtualTableShapeId	Retrieves the virtual table shape identifier of the symbol.
IDiaSymbol::get_volatileType	Retrieves a flag indicating whether the user-defined data type is volatile.

Remarks

Notes for Callers

Obtain this interface by calling one of the following methods:

• IDiaEnumSymbols::Item

• IDiaEnumSymbols::Next

• IDiaEnumSymbolsByAddr::Next

• IDiaEnumSymbolsByAddr::Prev

• IDiaEnumSymbolsByAddr::symbolByAddr

• IDiaEnumSymbolsByAddr::symbolByRVA

• IDiaEnumSymbolsByAddr::symbolByVA

• IDiaSession::findSymbolByAddr

• IDiaSession::findSymbolByRVA

• IDiaSession::findSymbolByRVAEx

• IDiaSession::findSymbolByVA

• IDiaSession::findSymbolByVAEx

• IDiaSession::findSymbolByToken

• IDiaSession::symbolById

• IDiaStackWalkHelper::symbolForVA

• IDiaSymbol::get_types

Example

This example shows how to display the local variables for a function at a given relative virtual address. It also shows how symbols of different types are related to each other.

Note

CDiaBSTR is a class that wraps a BSTR and automatically handles freeing the string when the instantiation goes out of scope.

void DumpLocalVars( DWORD rva, IDiaSession *pSession )
{
    CComPtr< IDiaSymbol > pBlock;
    if ( FAILED( psession->findSymbolByRVA( rva, SymTagBlock, &pBlock ) ) )
    {
        Fatal( "Failed to find symbols by RVA" );
    }
    CComPtr< IDiaSymbol > pscope;
    for ( ; pBlock != NULL; )
    {
        CComPtr< IDiaEnumSymbols > pEnum;
        // local data search
        if ( FAILED( pBlock->findChildren( SymTagNull, NULL, nsNone, &pEnum ) ) )
        {
            Fatal( "Local scope findChildren failed" );
        }
        CComPtr< IDiaSymbol > pSymbol;
        DWORD tag;
        DWORD celt;
        while ( pEnum != NULL &&
                SUCCEEDED( pEnum->Next( 1, &pSymbol, &celt ) ) &&
                celt == 1)
        {
            pSymbol->get_symTag( &tag );
            if ( tag == SymTagData )
            {
                CDiaBSTR name;
                DWORD    kind;
                pSymbol->get_name( &name );
                pSymbol->get_dataKind( &kind );
                if ( name != NULL )
                    wprintf_s( L"\t%s (%s)\n", name, szDataKinds[ kind ] );
            }
            else if ( tag == SymTagAnnotation )
            {
                CComPtr< IDiaEnumSymbols > pValues;
                // local data search
                wprintf_s( L"\tAnnotation:\n" );
                if ( FAILED( pSymbol->findChildren( SymTagNull, NULL, nsNone, &pValues ) ) )
                    Fatal( "Annotation findChildren failed" );
                pSymbol = NULL;
                while ( pValues != NULL &&
                        SUCCEEDED( pValues->Next( 1, &pSymbol, &celt ) ) &&
                        celt == 1 )
                {
                    CComVariant value;
                    if ( pSymbol->get_value( &value ) != S_OK )
                        Fatal( "No value for annotation data." );
                    wprintf_s( L"\t\t%ws\n", value.bstrVal );
                    pSymbol = NULL;
                }
            }
            pSymbol = NULL;
        }
        pBlock->get_symTag( &tag );
        if ( tag == SymTagFunction )    // stop when at function scope
            break;
        // move to lexical parent
        CComPtr< IDiaSymbol > pParent;
        if ( SUCCEEDED( pBlock->get_lexicalParent( &pParent ) )
            && pParent != NULL ) {
            pBlock = pParent;
        }
        else
        {
            Fatal( "Finding lexical parent failed." );
        }
    };
}

Requirements

Header: Dia2.h

Library: diaguids.lib

DLL: msdia80.dll

See also

• Interfaces (Debug Interface Access SDK)
• IDiaEnumSymbolsByAddr
• IDiaEnumSymbols
• IDiaSession
• Class Hierarchy of Symbol Types
• Symbols and Symbol Tags
• Compiland