My Project: Symbol Class Reference

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 }
	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.

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

const string &	getName (void) const
	Get the local name of the symbol.

Datatype *	getType (void) const
	Get the data-type.

uint8	getId (void) const
	Get a unique id for the symbol.

uint4	getFlags (void) const
	Get the boolean properties of the Symbol.

uint4	getDisplayFormat (void) const
	Get the format to display the Symbol in.

int2	getCategory (void) const
	Get the Symbol category.

uint2	getCategoryIndex (void) const
	Get the position of the Symbol within its category.

bool	isTypeLocked (void) const
	Is the Symbol type-locked.

bool	isNameLocked (void) const
	Is the Symbol name-locked.

bool	isSizeTypeLocked (void) const
	Is the Symbol size type-locked.

bool	isIndirectStorage (void) const
	Is storage really a pointer to the true Symbol.

bool	isHiddenReturn (void) const
	Is this a reference to the function return value.

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

bool	isMultiEntry (void) const
	Does this have more than one entire mapping.

bool	hasMergeProblems (void) const
	Were some SymbolEntrys not merged.

void	setMergeProblems (void)
	Mark that some SymbolEntrys could not be merged.

bool	isIsolated (void) const
	Return true if this is isolated from speculative merging.

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

Scope *	getScope (void) const
	Get the scope owning this Symbol.

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	numEntries (void) const
	Return the number of SymbolEntrys.

SymbolEntry *	getMapEntry (int4 i) const
	Return the i-th SymbolEntry for this Symbol.

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

int4	getResolutionDepth (const Scope *useScope) const
	Get the number of scope names to print to resolve symbol in given context. 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
virtual	~Symbol (void)
	Destructor.

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

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

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.

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 the number of scope names to print to resolve symbol in given context.

A value of 0 means the base Symbol name is visible and not overridden in the given use scope. A value of 1 means the base name may be overridden, but the parent scope name is not. The minimual number of names that distinguishes this Symbol uniquely within the use scope is returned.

Parameters

useScope is the given scope where this Symbol is being used

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

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

Member Function Documentation

◆ checkSizeTypeLock()

◆ getBytesConsumed()

◆ getFirstWholeMap()

◆ getMapEntry()

◆ getMapEntryPosition()

◆ getResolutionDepth()

◆ isNameUndefined()

◆ restoreXml()

◆ restoreXmlBody()

◆ restoreXmlHeader()

◆ saveXml()

◆ saveXmlBody()

◆ saveXmlHeader()

◆ setDisplayFormat()

◆ setIsolated()