sun.jvm.hotspot.runtime

Class CompiledVFrame

java.lang.Object

sun.jvm.hotspot.runtime.VFrame

sun.jvm.hotspot.runtime.JavaVFrame

sun.jvm.hotspot.runtime.CompiledVFrame

public class CompiledVFrame
extends JavaVFrame

FIXME: missing many accessors; all we have right now is the method and BCI. NOTE that this has been modified from the VM's version to handle NULL ScopeDescs for the debugging case. This simplifies using code a great deal.

Field Summary

Fields inherited from class sun.jvm.hotspot.runtime.VFrame

fr, regMap, thread

Constructor Summary

Constructors

Constructor and Description
CompiledVFrame(Frame fr, RegisterMap regMap, JavaThread thread, ScopeDesc scope, boolean mayBeImprecise)

Method Summary

Modifier and Type	Method and Description
int	getBCI()
NMethod	getCode() Returns the active method
NMethod	getCodeUnsafe() Returns the active method.
StackValueCollection	getExpressions()
StackValueCollection	getLocals()
Method	getMethod() JVM state
java.util.List	getMonitors() Returns List
int	getRawBCI() Returns SynchronizationEntryBCI or bci() (used for synchronization)
ScopeDesc	getScope() Returns the ScopeDesc
boolean	isCompiledFrame()
boolean	isDeoptimized()
boolean	isTop() Answers if the this is the top vframe in the frame, i.e., if the sender vframe is in the caller frame
boolean	mayBeImpreciseDbg() An indication of whether this VFrame is "precise" or a best guess.
VFrame	sender() Returns the sender vframe
VFrame	sender(boolean mayBeImprecise) Returns the sender vframe; takes argument for debugging situation

Methods inherited from class sun.jvm.hotspot.runtime.JavaVFrame

equals, hashCode, isJavaFrame, print, printActivation, printActivationOn, printOn, structuralCompare, verify

Methods inherited from class sun.jvm.hotspot.runtime.VFrame

getFrame, getRegisterMap, getThread, isEntryFrame, isInterpretedFrame, javaSender, newVFrame, newVFrame, printValue, printValueOn, top

Methods inherited from class java.lang.Object

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

Constructor Detail

CompiledVFrame

public CompiledVFrame(Frame fr,
                      RegisterMap regMap,
                      JavaThread thread,
                      ScopeDesc scope,
                      boolean mayBeImprecise)

Method Detail

isTop

public boolean isTop()

Description copied from class: VFrame

Answers if the this is the top vframe in the frame, i.e., if the sender vframe is in the caller frame

Overrides:

isTop in class VFrame

isCompiledFrame

public boolean isCompiledFrame()

Overrides:

isCompiledFrame in class VFrame

isDeoptimized

public boolean isDeoptimized()

Overrides:

isDeoptimized in class VFrame

mayBeImpreciseDbg

public boolean mayBeImpreciseDbg()

Description copied from class: VFrame

An indication of whether this VFrame is "precise" or a best guess. This is used in the debugging system to handle the top frame on the stack, which, since the system will in general not be at a safepoint, has to make some guesses about exactly where in the execution it is. Any debugger should indicate to the user that the information for this frame may not be 100% correct. FIXME: may need to move this up into VFrame instead of keeping it in CompiledVFrame.

Overrides:

mayBeImpreciseDbg in class VFrame

getCode

public NMethod getCode()

Returns the active method

getCodeUnsafe

public NMethod getCodeUnsafe()

Returns the active method. Does not perform a guarantee regarding unloaded methods -- more suitable for debugging system.

getScope

public ScopeDesc getScope()

Returns the ScopeDesc

getMethod

public Method getMethod()

Description copied from class: JavaVFrame

JVM state

Specified by:

getMethod in class JavaVFrame

getLocals

public StackValueCollection getLocals()

Specified by:

getLocals in class JavaVFrame

getExpressions

public StackValueCollection getExpressions()

Specified by:

getExpressions in class JavaVFrame

getMonitors

public java.util.List getMonitors()

Returns List

Specified by:

getMonitors in class JavaVFrame

getBCI

public int getBCI()

Specified by:

getBCI in class JavaVFrame

getRawBCI

public int getRawBCI()

Returns SynchronizationEntryBCI or bci() (used for synchronization)

sender

public VFrame sender()

Returns the sender vframe

Overrides:

sender in class VFrame

sender

public VFrame sender(boolean mayBeImprecise)

Description copied from class: VFrame

Returns the sender vframe; takes argument for debugging situation

Overrides:

sender in class VFrame