A manager for symbol scopes for a whole executable. More...

#include <database.hh>

Public Member Functions
	Database (Architecture *g, bool idByName)
	Constructor. More...

	~Database (void)
	Destructor.

void	adjustCaches (void)
	Let scopes adjust after configuration is finished. More...

void	attachScope (Scope newscope, Scope parent)
	Register a new Scope. More...

void	deleteScope (Scope *scope)
	Delete the given Scope and all its sub-scopes. More...

void	deleteSubScopes (Scope *scope)
	Delete all sub-scopes of the given Scope. More...

void	clearUnlocked (Scope *scope)
	Clear unlocked Symbols owned by the given Scope. More...

void	setRange (Scope *scope, const RangeList &rlist)
	Set the ownership range for a Scope. More...

void	addRange (Scope scope, AddrSpace spc, uintb first, uintb last)
	Add an address range to the ownership of a Scope. More...

void	removeRange (Scope scope, AddrSpace spc, uintb first, uintb last)
	Remove an address range from ownership of a Scope. More...

Scope *	resolveScope (uint8 id) const
	Look-up a Scope by id. More...

Scope *	resolveScopeFromSymbolName (const string &fullname, const string &delim, string &basename, Scope *start) const
	Get the Scope (and base name) associated with a qualified Symbol name. More...

Scope *	findCreateScope (uint8, const string &nm, Scope *parent)

Scope *	findCreateScopeFromSymbolName (const string &fullname, const string &delim, string &basename, Scope *start)
	Find (and if not found create) a specific subscope. More...

const Scope *	mapScope (const Scope *qpoint, const Address &addr, const Address &usepoint) const
	Determine the lowest-level Scope which might contain the given address as a Symbol. More...

Scope *	mapScope (Scope *qpoint, const Address &addr, const Address &usepoint)
	A non-constant version of mapScope() More...

void	setPropertyRange (uint4 flags, const Range &range)
	Set boolean properties over a given memory range. More...

void	saveXml (ostream &s) const
	Save the whole Database to an XML stream. More...

void	restoreXml (const Element *el)
	Recover the whole database from XML. More...

void	restoreXmlScope (const Element el, Scope newScope)
	Register and fill out a single Scope from an XML <scope> tag. More...

Detailed Description

A manager for symbol scopes for a whole executable.

This is the highest level container for anything related to Scope and Symbol objects, it indirectly holds the Funcdata objects as well, through the FunctionSymbol. It acts as the formal symbol table for the decompiler. The API is mostly concerned with the management of Scope objects.

A Scope object is initially registered via attachScope(), then it can looked up by name. This class maintains the cross Scope search by address capability, implemented as a map from an Address to the Scope that owns it. For efficiency, this map is really only applied to namespace Scopes, the global Scope and function Scopes are not entered in the map. This class also maintains a set of boolean properties that label memory ranges. This allows important properties like read-only and volatile to be put down even if the Symbols aren't yet known.

Constructor & Destructor Documentation

◆ Database()

Database::Database	(	Architecture *	g,
		bool	idByName
	)

Constructor.

Initialize a new symbol table, with no initial scopes or symbols.

Parameters

g	is the Architecture that owns the symbol table
idByName	is true if scope ids are calculated as a hash of the scope name.

Member Function Documentation

◆ addRange()

void Database::addRange	(	Scope *	scope,
		AddrSpace *	spc,
		uintb	first,
		uintb	last
	)

Add an address range to the ownership of a Scope.

The new range will be merged with the existing ownership. The address to Scope map is updated

Parameters

scope	is the given Scope
spc	is the address space of the memory range being added
first	is the offset of the first byte in the array
last	is the offset of the last byte

◆ adjustCaches()

void Database::adjustCaches ( void )

Let scopes adjust after configuration is finished.

Give this database the chance to inform existing scopes of any change to the configuration, which may have changed since the initial scopes were created.

◆ attachScope()

void Database::attachScope	(	Scope *	newscope,
		Scope *	parent
	)

Register a new Scope.

The new Scope must be initially empty and this Database takes over ownership. Practically, this is just setting up the new Scope as a sub-scope of its parent. The parent Scope should already be registered with this Database, or NULL can be passed to register the global Scope.

Parameters

newscope	is the new Scope being registered
parent	is the parent Scope or NULL

◆ clearUnlocked()

void Database::clearUnlocked ( Scope * scope )

Clear unlocked Symbols owned by the given Scope.

All unlocked symbols in this Scope, and recursively into its sub-scopes, are removed.

Parameters

scope is the given Scope

◆ deleteScope()

void Database::deleteScope ( Scope * scope )

Delete the given Scope and all its sub-scopes.

Parameters

scope is the given Scope

◆ deleteSubScopes()

void Database::deleteSubScopes ( Scope * scope )

Delete all sub-scopes of the given Scope.

The given Scope is not deleted, only its children.

Parameters

scope is the given Scope

◆ findCreateScope()

Scope * Database::findCreateScope	(	uint8	id,
		const string &	nm,
		Scope *	parent
	)

Look for a Scope by id. If it does not exist, create a new scope with the given name and parent scope.

Parameters

id	is the global id of the Scope
nm	is the given name of the Scope
parent	is the given parent scope to search

Returns: the subscope object either found or created

◆ findCreateScopeFromSymbolName()

Scope * Database::findCreateScopeFromSymbolName	(	const string &	fullname,
		const string &	delim,
		string &	basename,
		Scope *	start
	)

Find (and if not found create) a specific subscope.

Find and/or create Scopes associated with a qualified Symbol name.

The name is parsed using a delimiter that is passed in. The name can be only partially qualified by passing in a starting Scope, which the name is assumed to be relative to. Otherwise the name is assumed to be relative to the global Scope. The unqualified (base) name of the Symbol is passed back to the caller. Any missing scope in the path is created.

Parameters

fullname	is the qualified Symbol name
delim	is the delimiter separating names
basename	will hold the passed back base Symbol name
start	is the Scope to start drilling down from, or NULL for the global scope

Returns: the Scope being referred to by the name

◆ mapScope() [1/2]

const Scope * Database::mapScope	(	const Scope *	qpoint,
		const Address &	addr,
		const Address &	usepoint
	)		const

Determine the lowest-level Scope which might contain the given address as a Symbol.

As currently implemented, this method can only find a namespace Scope. When searching for a Symbol by Address, the global Scope is always searched because it is the terminating Scope when recursively walking scopes through the parent relationship, so it isn't entered in this map. A function level Scope, also not entered in the map, is only returned as the Scope passed in as a default, when no namespace Scope claims the address.

Parameters

qpoint	is the default Scope returned if no owner is found
addr	is the address whose owner should be searched for
usepoint	is a point in code where the address is being accessed (may be invalid)

Returns: a Scope to act as a starting point for a hierarchical search

◆ mapScope() [2/2]

Scope * Database::mapScope	(	Scope *	qpoint,
		const Address &	addr,
		const Address &	usepoint
	)

A non-constant version of mapScope()

Parameters

qpoint	is the default Scope returned if no owner is found
addr	is the address whose owner should be searched for
usepoint	is a point in code where the address is being accessed (may be invalid)

Returns: a Scope to act as a starting point for a hierarchical search

◆ removeRange()

void Database::removeRange	(	Scope *	scope,
		AddrSpace *	spc,
		uintb	first,
		uintb	last
	)

Remove an address range from ownership of a Scope.

Addresses owned by the Scope that are disjoint from the given range are not affected.

Parameters

scope	is the given Scope
spc	is the address space of the memory range being removed
first	is the offset of the first byte in the array
last	is the offset of the last byte

◆ resolveScope()

Scope * Database::resolveScope ( uint8 id ) const

Look-up a Scope by id.

Find a Scope object, given its global id. Return null if id is not mapped to a Scope.

Parameters

id	is the global id

Returns: the matching Scope or null

◆ resolveScopeFromSymbolName()

Scope * Database::resolveScopeFromSymbolName	(	const string &	fullname,
		const string &	delim,
		string &	basename,
		Scope *	start
	)		const

Get the Scope (and base name) associated with a qualified Symbol name.

The name is parsed using a delimiter that is passed in. The name can be only partially qualified by passing in a starting Scope, which the name is assumed to be relative to. Otherwise the name is assumed to be relative to the global Scope. The unqualified (base) name of the Symbol is passed back to the caller.

Parameters

fullname	is the qualified Symbol name
delim	is the delimiter separating names
basename	will hold the passed back base Symbol name
start	is the Scope to start drilling down from, or NULL for the global scope

Returns: the Scope being referred to by the name

◆ restoreXml()

void Database::restoreXml ( const Element * el )

Recover the whole database from XML.

The children of a <db> tag are examined to recover Scope and Symbol objects.

Parameters

el	is the <db> element

◆ restoreXmlScope()

void Database::restoreXmlScope	(	const Element *	el,
		Scope *	newScope
	)

Register and fill out a single Scope from an XML <scope> tag.

This allows incremental building of the Database from multiple XML sources. An empty Scope must already be allocated. It is registered with this Database, and then populated with Symbol objects based as the content of a given XML tag. The tag can either be a <scope> itself, or another tag that wraps a <scope> tag as its first child.

Parameters

el	is the given <scope> element
newScope	is the empty Scope

◆ saveXml()

void Database::saveXml ( ostream & s ) const

Save the whole Database to an XML stream.

This writes a single <db> tag to the stream, which contains sub-tags for each Scope (which contain Symbol sub-tags in turn).

Parameters

s	is the output stream

◆ setPropertyRange()

void Database::setPropertyRange	(	uint4	flags,
		const Range &	range
	)

Set boolean properties over a given memory range.

This allows the standard boolean Varnode properties like read-only and volatile to be put an a memory range, independent of whether a Symbol is there or not. These get picked up by the Scope::queryProperties() method in particular.

Parameters

flags	is the set of boolean properties
range	is the memory range to label

◆ setRange()

void Database::setRange	(	Scope *	scope,
		const RangeList &	rlist
	)

Set the ownership range for a Scope.

Any existing ownership is completely replaced. The address to Scope map is updated.

Parameters

scope	is the given Scope
rlist	is the set of addresses to mark as owned

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

database.hh
database.cc

Public Member Functions

Detailed Description

Constructor & Destructor Documentation

◆ Database()

Member Function Documentation

◆ addRange()

◆ adjustCaches()

◆ attachScope()

◆ clearUnlocked()

◆ deleteScope()

◆ deleteSubScopes()

◆ findCreateScope()

◆ findCreateScopeFromSymbolName()

◆ mapScope() [1/2]

◆ mapScope() [2/2]

◆ removeRange()

◆ resolveScope()

◆ resolveScopeFromSymbolName()

◆ restoreXml()

◆ restoreXmlScope()

◆ saveXml()

◆ setPropertyRange()

◆ setRange()