The base class for a symbol in a symbol table or scope. More...

#include <database.hh>

Inheritance diagram for Symbol:

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Collaboration diagram for Symbol:

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Public Types
enum	{ force_hex = 1, force_dec = 2, force_oct = 3, force_bin = 4, force_char = 5, size_typelock = 8, isolate = 16, merge_problems = 32, is_this_ptr = 64 }
	Possible display (dispflag) properties for a Symbol. More...

Public Member Functions
	Symbol (Scope sc, const string &nm, Datatype ct)
	Construct given a name and data-type. More...

	Symbol (Scope *sc)
	Construct for use with restoreXml() More...

bool	isNameUndefined (void) const
	Does this have an undefined name. More...

void	setIsolated (bool val)
	Set whether this Symbol should be speculatively merged. More...

SymbolEntry *	getFirstWholeMap (void) const
	Get the first entire mapping of the symbol. More...

SymbolEntry *	getMapEntry (const Address &addr) const
	Get first mapping of the symbol that contains the given Address. More...

int4	getMapEntryPosition (const SymbolEntry *entry) const
	Position of given SymbolEntry within this multi-entry Symbol. More...

int4	getResolutionDepth (const Scope *useScope) const
	Get number of scope names needed to resolve this symbol. More...

void	saveXmlHeader (ostream &s) const
	Save basic Symbol properties as XML attributes. More...

void	restoreXmlHeader (const Element *el)
	Restore basic Symbol properties from XML. More...

void	saveXmlBody (ostream &s) const
	Save details of the Symbol to XML. More...

void	restoreXmlBody (List::const_iterator iter)
	Restore details of the Symbol from XML. More...

virtual void	saveXml (ostream &s) const
	Save this Symbol to an XML stream. More...

virtual void	restoreXml (const Element *el)
	Restore this Symbol from an XML stream. More...

virtual int4	getBytesConsumed (void) const
	Get number of bytes consumed within the address->symbol map. More...

Static Public Attributes
static uint8	ID_BASE = 0x4000000000000000L
	Base of internal ID's.

Protected Member Functions
void	setDisplayFormat (uint4 val)
	Set the display format for this Symbol. More...

void	checkSizeTypeLock (void)
	Calculate if size_typelock property is on. More...

void	setThisPointer (bool val)
	Toggle whether this is the "this" pointer for a class method. More...

Protected Attributes
Scope *	scope
	The scope that owns this symbol.

string	name
	The local name of the symbol.

Datatype *	type
	The symbol's data-type.

uint4	nameDedup
	id to distinguish symbols with the same name

uint4	flags
	Varnode-like properties of the symbol.

uint4	dispflags
	Flags affecting the display of this symbol.

int2	category
	Special category (-1==none 0=parameter 1=equate)

uint2	catindex
	Index within category.

uint8	symbolId
	Unique id, 0=unassigned.

vector< list< SymbolEntry >::iterator >	mapentry
	List of storage locations labeled with this Symbol.

const Scope *	depthScope
	Scope associated with current depth resolution.

int4	depthResolution
	Number of namespace elements required to resolve symbol in current scope.

uint4	wholeCount
	Number of SymbolEntries that map to the whole Symbol.

Friends
class	Scope

class	ScopeInternal

class	SymbolCompareName

Detailed Description

The base class for a symbol in a symbol table or scope.

At its most basic, a Symbol is a name and a data-type. Practically a Symbol knows what Scope its in, how it should be displayed, and the symbols category. A category is a subset of symbols that are stored together for quick access. The category field can be:

-1 for no category
0 indicates a function parameter
1 indicates an equate symbol

Member Enumeration Documentation

◆ anonymous enum

anonymous enum

Possible display (dispflag) properties for a Symbol.

Enumerator
force_hex	Force hexadecimal printing of constant symbol.
force_dec	Force decimal printing of constant symbol.
force_oct	Force octal printing of constant symbol.
force_bin	Force binary printing of constant symbol.
force_char	Force integer to be printed as a character constant.
size_typelock	Only the size of the symbol is typelocked.
isolate	Symbol should not speculatively merge automatically.
merge_problems	Set if some SymbolEntrys did not get merged.
is_this_ptr	We are the "this" symbol for a class method.

Constructor & Destructor Documentation

◆ Symbol() [1/2]

Symbol::Symbol	(	Scope *	sc,
		const string &	nm,
		Datatype *	ct
	)

inline

Construct given a name and data-type.

Parameters

sc	is the scope containing the new symbol
nm	is the local name of the symbol
ct	is the data-type of the symbol

◆ Symbol() [2/2]

Symbol::Symbol ( Scope * sc )

inline

Construct for use with restoreXml()

Parameters

sc	is the scope containing the new symbol

Member Function Documentation

◆ checkSizeTypeLock()

void Symbol::checkSizeTypeLock ( void )

protected

Calculate if size_typelock property is on.

Examine the data-type to decide if the Symbol has the special property called size_typelock, which indicates the size of the Symbol is locked, but the data-type is not locked (and can float)

◆ getBytesConsumed()

int4 Symbol::getBytesConsumed ( void ) const

virtual

Get number of bytes consumed within the address->symbol map.

Get the number of bytes consumed by a SymbolEntry representing this Symbol. By default, this is the number of bytes consumed by the Symbol's data-type. This gives the amount of leeway a search has when the address queried does not match the exact address of the Symbol. With functions, the bytes consumed by a SymbolEntry may not match the data-type size.

Returns: the number of bytes in a default SymbolEntry

Reimplemented in FunctionSymbol.

◆ getFirstWholeMap()

SymbolEntry * Symbol::getFirstWholeMap ( void ) const

Get the first entire mapping of the symbol.

Returns: the first SymbolEntry

◆ getMapEntry()

SymbolEntry * Symbol::getMapEntry ( const Address & addr ) const

Get first mapping of the symbol that contains the given Address.

This method may return a partial entry, where the SymbolEntry is only holding part of the whole Symbol.

Parameters

addr	is an address within the desired storage location of the Symbol

Returns: the first matching SymbolEntry

◆ getMapEntryPosition()

int4 Symbol::getMapEntryPosition ( const SymbolEntry * entry ) const

Position of given SymbolEntry within this multi-entry Symbol.

Among all the SymbolEntrys that map this entire Symbol, calculate the position of the given SymbolEntry within the list.

Parameters

entry is the given SymbolEntry

Returns: its position within the list or -1 if it is not in the list

◆ getResolutionDepth()

int4 Symbol::getResolutionDepth ( const Scope * useScope ) const

Get number of scope names needed to resolve this symbol.

For a given context scope where this Symbol is used, determine how many elements of the full namespace path need to be printed to correctly distinguish it. A value of 0 means the base symbol name is visible and not overridden in the context scope. A value of 1 means the base name may be overridden, but the parent scope name is not. The minimal number of names that distinguishes the symbol name uniquely within the use scope is returned.

Parameters

useScope is the given scope where the symbol is being used

Returns: the number of (extra) names needed to distinguish the symbol

◆ isNameUndefined()

bool Symbol::isNameUndefined ( void ) const

Does this have an undefined name.

The name for a Symbol can be unspecified. See ScopeInternal::buildUndefinedName

Returns: true if the name of this is undefined

◆ restoreXml()

void Symbol::restoreXml ( const Element * el )

virtual

Restore this Symbol from an XML stream.

Parameters

el	is the root XML tag of the symbol

Reimplemented in ExternRefSymbol, LabSymbol, EquateSymbol, and FunctionSymbol.

◆ restoreXmlBody()

void Symbol::restoreXmlBody ( List::const_iterator iter )

Restore details of the Symbol from XML.

Parameters

iter	iterates over XML children of the root <symbol> tag

◆ restoreXmlHeader()

void Symbol::restoreXmlHeader ( const Element * el )

Restore basic Symbol properties from XML.

Parameters

el	is the XML <symbol> element

◆ saveXml()

void Symbol::saveXml ( ostream & s ) const

virtual

Save this Symbol to an XML stream.

Parameters

s	is the output stream

Reimplemented in ExternRefSymbol, LabSymbol, EquateSymbol, and FunctionSymbol.

◆ saveXmlBody()

void Symbol::saveXmlBody ( ostream & s ) const

Save details of the Symbol to XML.

Save the data-type for the Symbol

Parameters

s	is the output stream

◆ saveXmlHeader()

void Symbol::saveXmlHeader ( ostream & s ) const

Save basic Symbol properties as XML attributes.

Parameters

s	is the output stream

◆ setDisplayFormat()

void Symbol::setDisplayFormat ( uint4 val )

inlineprotected

Set the display format for this Symbol.

Force a specific display format for constant symbols

Parameters

val	is the format: force_hex, force_dec, force_oct, etc.

◆ setIsolated()

void Symbol::setIsolated ( bool val )

Set whether this Symbol should be speculatively merged.

If the given value is true, any Varnodes that map directly to this Symbol, will not be speculatively merged with other Varnodes. (Required merges will still happen).

Parameters

val	is the given boolean value

◆ setThisPointer()

void Symbol::setThisPointer ( bool val )

protected

Toggle whether this is the "this" pointer for a class method.

Parameters

val	is true if we are the "this" pointer

The documentation for this class was generated from the following files:

database.hh
database.cc

Public Types

Public Member Functions

Static Public Attributes

Protected Member Functions

Protected Attributes

Friends

Detailed Description

Member Enumeration Documentation

◆ anonymous enum

Constructor & Destructor Documentation

◆ Symbol() [1/2]

◆ Symbol() [2/2]

Member Function Documentation

◆ checkSizeTypeLock()

◆ getBytesConsumed()

◆ getFirstWholeMap()

◆ getMapEntry()

◆ getMapEntryPosition()

◆ getResolutionDepth()

◆ isNameUndefined()

◆ restoreXml()

◆ restoreXmlBody()

◆ restoreXmlHeader()

◆ saveXml()

◆ saveXmlBody()

◆ saveXmlHeader()

◆ setDisplayFormat()

◆ setIsolated()

◆ setThisPointer()