Package ghidra.program.model.block

Class OverlapCodeSubModel

java.lang.Object

ghidra.program.model.block.OverlapCodeSubModel

All Implemented Interfaces:

CodeBlockModel, SubroutineBlockModel

Direct Known Subclasses:

IsolatedEntrySubModel

public class OverlapCodeSubModel
extends java.lang.Object
implements SubroutineBlockModel

OverlapCodeSubModel (O-model) defines subroutines with a unique entry point, which may share code with other subroutines. Each entry- point may either be a source or called entry-point and is identified using the MultEntSubModel. This model defines the set of addresses contained within each subroutine based upon the possible flows from its' entry- point. Flows which encounter another entry-point are terminated.

NOTE: This differs from the original definition of an entry point, however, the intent of the O-Model is preserved.

See Also:

CodeBlockModel, MultEntSubModel

Field Summary

Fields

Modifier and Type	Field	Description
protected ghidra.program.model.block.CodeBlockCache	foundOSubs
protected Listing	listing
protected MultEntSubModel	modelM
static java.lang.String	OVERLAP_MODEL_NAME
protected Program	program

Fields inherited from interface ghidra.program.model.block.CodeBlockModel

emptyBlockArray

Constructor Summary

Constructors

Constructor	Description
OverlapCodeSubModel(Program program)	Construct a OverlapCodeSubModel subroutine on a program.
OverlapCodeSubModel(Program program, boolean includeExternals)	Construct a OverlapCodeSubModel subroutine on a program.

Method Summary

Modifier and Type	Method	Description
boolean	allowsBlockOverlap()	Return true if this model allows overlapping of address sets for the blocks it returns.
protected CodeBlock	createSub(AddressSetView addrSet, Address entryPt)	Create a new Subroutine which has specified address set and entry point.
boolean	externalsIncluded()	Returns true if externals are handled by the model, false if externals are ignored.
SubroutineBlockModel	getBaseSubroutineModel()	Get the underlying base subroutine model.
CodeBlockModel	getBasicBlockModel()	Get the basic block model used by this model.
CodeBlock	getCodeBlockAt(Address addr, TaskMonitor monitor)	Get the code block with a starting address (i.e., entry-point) of addr.
CodeBlockIterator	getCodeBlocks(TaskMonitor monitor)	Get an iterator over the code blocks in the entire program.
CodeBlock[]	getCodeBlocksContaining(Address addr, TaskMonitor monitor)	Get all the Code Blocks containing the address.
CodeBlockIterator	getCodeBlocksContaining(AddressSetView addrSet, TaskMonitor monitor)	Get an iterator over code blocks which overlap the specified address set.
CodeBlockReferenceIterator	getDestinations(CodeBlock block, TaskMonitor monitor)	Get an iterator over the destination flows out of the block.
CodeBlock	getFirstCodeBlockContaining(Address addr, TaskMonitor monitor)	Get the first code block that contains the given address.
FlowType	getFlowType(CodeBlock block)	Return in general how things flow out of this node.
Listing	getListing()	Returns the listing associated with this block model.
protected MultEntSubModel	getModelM()	Returns the Multiple Entry Block Model used by this model.
java.lang.String	getName()	Returns the model name.
java.lang.String	getName(CodeBlock block)	Get a name for this block.
int	getNumDestinations(CodeBlock block, TaskMonitor monitor)	Get the number of destination flows out of the block.
int	getNumSources(CodeBlock block, TaskMonitor monitor)	Get the number of source flows into the block.
Program	getProgram()	Returns the program object associated with this CodeBlockModel instance.
CodeBlockReferenceIterator	getSources(CodeBlock block, TaskMonitor monitor)	Get an iterator over the source flows into the block.
protected CodeBlock	getSubroutine(Address mStartAddr, TaskMonitor monitor)	Get the subroutine code block which starts at the specified address which is an entry point of a Model-M subroutine.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

OVERLAP_MODEL_NAME

public static final java.lang.String OVERLAP_MODEL_NAME

See Also:

Constant Field Values

program

protected Program program

listing

protected Listing listing

foundOSubs

protected ghidra.program.model.block.CodeBlockCache foundOSubs

modelM

protected MultEntSubModel modelM

Constructor Detail

OverlapCodeSubModel

public OverlapCodeSubModel(Program program)

Construct a OverlapCodeSubModel subroutine on a program.

Parameters:

program - program to create blocks from.

OverlapCodeSubModel

public OverlapCodeSubModel(Program program,
                           boolean includeExternals)

Construct a OverlapCodeSubModel subroutine on a program.

Parameters:

program - program to create blocks from.

includeExternals - external blocks will be included if true

Method Detail

getSubroutine

protected CodeBlock getSubroutine(Address mStartAddr,
                                  TaskMonitor monitor)
                           throws CancelledException

Get the subroutine code block which starts at the specified address which is an entry point of a Model-M subroutine. Classes which extend this class should implement this method.

Parameters:

mStartAddr - = a Model-M subroutine entry point.

monitor - task monitor which allows user to cancel operation.

Returns:

a subroutine code block or null if not found.

Throws:

CancelledException - if the monitor cancels the operation.

getCodeBlockAt

public CodeBlock getCodeBlockAt(Address addr,
                                TaskMonitor monitor)
                         throws CancelledException

Description copied from interface: CodeBlockModel

Get the code block with a starting address (i.e., entry-point) of addr.

Specified by:

getCodeBlockAt in interface CodeBlockModel

Parameters:

addr - starting address of a codeblock.

monitor - task monitor which allows user to cancel operation.

Returns:

null if there is no codeblock starting at the address.

Throws:

CancelledException - if the monitor cancels the operation.

See Also:

CodeBlockModel.getCodeBlockAt(ghidra.program.model.address.Address, ghidra.util.task.TaskMonitor)

getCodeBlocksContaining

public CodeBlock[] getCodeBlocksContaining(Address addr,
                                           TaskMonitor monitor)
                                    throws CancelledException

Get all the Code Blocks containing the address. Model-O is the only of the MOP models that allows for there to be more than one

Specified by:

getCodeBlocksContaining in interface CodeBlockModel

Parameters:

addr - Address to find a containing block.

monitor - task monitor which allows user to cancel operation.

Returns:

A CodeBlock array with one entry containing the subroutine that contains the address empty array otherwise.

Throws:

CancelledException - if the monitor cancels the operation.

getFirstCodeBlockContaining

public CodeBlock getFirstCodeBlockContaining(Address addr,
                                             TaskMonitor monitor)
                                      throws CancelledException

Description copied from interface: CodeBlockModel

Get the first code block that contains the given address.

Specified by:

getFirstCodeBlockContaining in interface CodeBlockModel

Parameters:

addr - address to find a containing block.

monitor - task monitor which allows user to cancel operation.

Returns:

a block that contains the address, or null otherwise.

Throws:

CancelledException - if the monitor cancels the operation.

See Also:

CodeBlockModel.getFirstCodeBlockContaining(ghidra.program.model.address.Address, ghidra.util.task.TaskMonitor)

getCodeBlocks

public CodeBlockIterator getCodeBlocks(TaskMonitor monitor)
                                throws CancelledException

Description copied from interface: CodeBlockModel

Get an iterator over the code blocks in the entire program.

Specified by:

getCodeBlocks in interface CodeBlockModel

Parameters:

monitor - task monitor which allows user to cancel operation.

Throws:

CancelledException - if the monitor cancels the operation.

See Also:

CodeBlockModel.getCodeBlocks(ghidra.util.task.TaskMonitor)

getCodeBlocksContaining

public CodeBlockIterator getCodeBlocksContaining(AddressSetView addrSet,
                                                 TaskMonitor monitor)
                                          throws CancelledException

Description copied from interface: CodeBlockModel

Get an iterator over code blocks which overlap the specified address set.

Specified by:

getCodeBlocksContaining in interface CodeBlockModel

Parameters:

addrSet - an address set within program

monitor - task monitor which allows user to cancel operation.

Throws:

CancelledException - if the monitor cancels the operation.

See Also:

CodeBlockModel.getCodeBlocksContaining(ghidra.program.model.address.AddressSetView, ghidra.util.task.TaskMonitor)

getModelM

protected MultEntSubModel getModelM()

Returns the Multiple Entry Block Model used by this model.

Returns:

the Multiple Entry Block Model used by this model

getProgram

public Program getProgram()

Description copied from interface: CodeBlockModel

Returns the program object associated with this CodeBlockModel instance.

Specified by:

getProgram in interface CodeBlockModel

Returns:

program associated with this CodeBlockModel.

See Also:

CodeBlockModel.getProgram()

getListing

public Listing getListing()

Returns the listing associated with this block model.

Returns:

the listing associated with this block model

getName

public java.lang.String getName(CodeBlock block)

Description copied from interface: CodeBlockModel

Get a name for this block.

Specified by:

getName in interface CodeBlockModel

Returns:

usually the label at the start address of the block however the model can choose any name it wants for its blocks.

See Also:

CodeBlockModel.getName(ghidra.program.model.block.CodeBlock)

getFlowType

public FlowType getFlowType(CodeBlock block)

Return in general how things flow out of this node. This method exists for the SIMPLEBLOCK model.

Since it doesn't make a great deal of sense to ask for this method in the case of subroutines, we return FlowType.UNKNOWN as long as the block exists.

If this block has no valid instructions, it can't flow, so FlowType.INVALID is returned.

Specified by:

getFlowType in interface CodeBlockModel

Returns:

flow type of this node

getSources

public CodeBlockReferenceIterator getSources(CodeBlock block,
                                             TaskMonitor monitor)
                                      throws CancelledException

Description copied from interface: CodeBlockModel

Get an iterator over the source flows into the block.

Specified by:

getSources in interface CodeBlockModel

Parameters:

block - the block to get the destination flows for.

monitor - task monitor which allows user to cancel operation.

Throws:

CancelledException - if the monitor cancels the operation.

See Also:

CodeBlockModel.getSources(ghidra.program.model.block.CodeBlock, ghidra.util.task.TaskMonitor)

getNumSources

public int getNumSources(CodeBlock block,
                         TaskMonitor monitor)
                  throws CancelledException

Description copied from interface: CodeBlockModel

Get the number of source flows into the block.

Specified by:

getNumSources in interface CodeBlockModel

Parameters:

block - the code blocks to get the destination flows for.

monitor - task monitor which allows user to cancel operation.

Throws:

CancelledException - if the monitor cancels the operation.

See Also:

CodeBlockModel.getNumSources(ghidra.program.model.block.CodeBlock, ghidra.util.task.TaskMonitor)

getDestinations

public CodeBlockReferenceIterator getDestinations(CodeBlock block,
                                                  TaskMonitor monitor)
                                           throws CancelledException

Description copied from interface: CodeBlockModel

Get an iterator over the destination flows out of the block.

Specified by:

getDestinations in interface CodeBlockModel

Parameters:

block - the block to get the destination flows for.

monitor - task monitor which allows user to cancel operation.

Throws:

CancelledException - if the monitor cancels the operation.

See Also:

CodeBlockModel.getDestinations(ghidra.program.model.block.CodeBlock, ghidra.util.task.TaskMonitor)

getNumDestinations

public int getNumDestinations(CodeBlock block,
                              TaskMonitor monitor)
                       throws CancelledException

Description copied from interface: CodeBlockModel

Get the number of destination flows out of the block.

Specified by:

getNumDestinations in interface CodeBlockModel

Parameters:

block - the code blocks to get the destination flows for.

monitor - task monitor which allows user to cancel operation.

Throws:

CancelledException - if the monitor cancels the operation.

See Also:

CodeBlockModel.getNumDestinations(ghidra.program.model.block.CodeBlock, ghidra.util.task.TaskMonitor)

createSub

protected CodeBlock createSub(AddressSetView addrSet,
                              Address entryPt)

Create a new Subroutine which has specified address set and entry point. Cache the model-O subroutine.

Parameters:

addrSet - contains the address set of the model-O subroutine

entryPt - the OSub entry point.

Returns:

subroutine block that was created

getBasicBlockModel

public CodeBlockModel getBasicBlockModel()

Description copied from interface: CodeBlockModel

Get the basic block model used by this model.

Specified by:

getBasicBlockModel in interface CodeBlockModel

See Also:

CodeBlockModel.getBasicBlockModel()

getName

public java.lang.String getName()

Description copied from interface: CodeBlockModel

Returns the model name.

Specified by:

getName in interface CodeBlockModel

Returns:

the model name

See Also:

CodeBlockModel.getName()

getBaseSubroutineModel

public SubroutineBlockModel getBaseSubroutineModel()

Description copied from interface: SubroutineBlockModel

Get the underlying base subroutine model. This is generally the MultEntSubModel (M-Model).

Specified by:

getBaseSubroutineModel in interface SubroutineBlockModel

Returns:

base subroutine model. If there is no base model, this subroutine model is returned.

See Also:

SubroutineBlockModel.getBaseSubroutineModel()

allowsBlockOverlap

public boolean allowsBlockOverlap()

Description copied from interface: CodeBlockModel

Return true if this model allows overlapping of address sets for the blocks it returns.

Specified by:

allowsBlockOverlap in interface CodeBlockModel

Returns:

true if this model allows overlapping of address sets for the blocks it returns. This implies that getBlocksContaining() can return more than one block. false implies that getBlocksContaining() will return at most one block.

See Also:

CodeBlockModel.allowsBlockOverlap()

externalsIncluded

public boolean externalsIncluded()

Description copied from interface: CodeBlockModel

Returns true if externals are handled by the model, false if externals are ignored. When handled, externals are represented by an ExtCodeBlockImpl.

Specified by:

externalsIncluded in interface CodeBlockModel