com.sun.squawk.debugger
Class JDWP

java.lang.Object
  com.sun.squawk.debugger.JDWP

public class JDWP
extends Object

Java(tm) Debug Wire Protocol

Field Summary

static int	ArrayReference_COMMAND_SET
static int	ArrayReference_GetValues_COMMAND Returns a range of array components.
static int	ArrayReference_Length_COMMAND Returns the number of components in a given array.
static int	ArrayReference_SetValues_COMMAND Sets a range of array components.
static int	ArrayType_COMMAND_SET
static int	ArrayType_NewInstance_COMMAND Creates a new array object of this type with a given length.
static int	ClassLoaderReference_COMMAND_SET
static int	ClassLoaderReference_VisibleClasses_COMMAND Returns a list of all classes which this class loader has been requested to load.
static int	ClassObjectReference_COMMAND_SET
static int	ClassObjectReference_ReflectedType_COMMAND Returns the reference type reflected by this class object.
static int	ClassStatus_ERROR
static int	ClassStatus_INITIALIZED
static int	ClassStatus_PREPARED
static int	ClassStatus_VERIFIED
static int	ClassStatus_VERIFIED_PREPARED_INITIALIZED
static int	ClassType_COMMAND_SET
static int	ClassType_InvokeMethod_COMMAND Invokes a static method.
static int	ClassType_NewInstance_COMMAND Creates a new object of this type, invoking the specified constructor.
static int	ClassType_SetValues_COMMAND Sets the value of one or more static fields.
static int	ClassType_Superclass_COMMAND Returns the immediate superclass of a class.
static int	Error_ABSENT_INFORMATION
static int	Error_ACCESS_DENIED
static int	Error_ADD_METHOD_NOT_IMPLEMENTED
static int	Error_ALREADY_INVOKING
static int	Error_CIRCULAR_CLASS_DEFINITION
static int	Error_CLASS_MODIFIERS_CHANGE_NOT_IMPLEMENTED
static int	Error_CLASS_NOT_PREPARED
static int	Error_DELETE_METHOD_NOT_IMPLEMENTED
static int	Error_DUPLICATE
static int	Error_FAILS_VERIFICATION
static int	Error_HIERARCHY_CHANGE_NOT_IMPLEMENTED
static int	Error_ILLEGAL_ARGUMENT
static int	Error_INTERNAL
static int	Error_INTERRUPT
static int	Error_INVALID_ARRAY
static int	Error_INVALID_CLASS
static int	Error_INVALID_CLASS_FORMAT
static int	Error_INVALID_CLASS_LOADER
static int	Error_INVALID_COUNT
static int	Error_INVALID_EVENT_TYPE
static int	Error_INVALID_FIELDID
static int	Error_INVALID_FRAMEID
static int	Error_INVALID_INDEX
static int	Error_INVALID_LENGTH
static int	Error_INVALID_LOCATION
static int	Error_INVALID_METHODID
static int	Error_INVALID_MONITOR
static int	Error_INVALID_OBJECT
static int	Error_INVALID_PRIORITY
static int	Error_INVALID_SLOT
static int	Error_INVALID_STRING
static int	Error_INVALID_TAG
static int	Error_INVALID_THREAD
static int	Error_INVALID_THREAD_GROUP
static int	Error_INVALID_TYPESTATE
static int	Error_METHOD_MODIFIERS_CHANGE_NOT_IMPLEMENTED
static int	Error_NAMES_DONT_MATCH
static int	Error_NATIVE_METHOD
static int	Error_NO_MORE_FRAMES
static int	Error_NONE
static int	Error_NOT_CURRENT_FRAME
static int	Error_NOT_FOUND
static int	Error_NOT_IMPLEMENTED
static int	Error_NOT_MONITOR_OWNER
static int	Error_NULL_POINTER
static int	Error_OPAQUE_FRAME
static int	Error_OUT_OF_MEMORY
static int	Error_SCHEMA_CHANGE_NOT_IMPLEMENTED
static int	Error_THREAD_NOT_SUSPENDED
static int	Error_THREAD_SUSPENDED
static int	Error_TRANSPORT_INIT
static int	Error_TRANSPORT_LOAD
static int	Error_TYPE_MISMATCH
static int	Error_UNATTACHED_THREAD
static int	Error_UNSUPPORTED_VERSION
static int	Error_VM_DEAD
static int	Event_COMMAND_SET
static int	Event_Composite_COMMAND Several events may occur at a given time in the target VM.
static int	EventKind_BREAKPOINT
static int	EventKind_CLASS_LOAD
static int	EventKind_CLASS_PREPARE
static int	EventKind_CLASS_UNLOAD
static int	EventKind_EXCEPTION
static int	EventKind_EXCEPTION_CATCH
static int	EventKind_FIELD_ACCESS
static int	EventKind_FIELD_MODIFICATION
static int	EventKind_FRAME_POP
static int	EventKind_METHOD_ENTRY
static int	EventKind_METHOD_EXIT
static int	EventKind_SINGLE_STEP
static int	EventKind_THREAD_DEATH
static int	EventKind_THREAD_END
static int	EventKind_THREAD_START
static int	EventKind_USER_DEFINED
static int	EventKind_VM_DEATH
static int	EventKind_VM_DISCONNECTED
static int	EventKind_VM_INIT
static int	EventKind_VM_START
static int	EventRequest_Clear_COMMAND Clear an event request.
static int	EventRequest_ClearAllBreakpoints_COMMAND Removes all set breakpoints.
static int	EventRequest_COMMAND_SET
static int	EventRequest_MOD_CLASS_EXCLUDE
static int	EventRequest_MOD_CLASS_MATCH
static int	EventRequest_MOD_CLASS_ONLY
static int	EventRequest_MOD_CONDITIONAL
static int	EventRequest_MOD_COUNT Modifier kind values that make events conditional.
static int	EventRequest_MOD_EXCEPTION_ONLY
static int	EventRequest_MOD_FIELD_ONLY
static int	EventRequest_MOD_INSTANCE_ONLY
static int	EventRequest_MOD_LOCATION_ONLY
static int	EventRequest_MOD_STEP
static int	EventRequest_MOD_THREAD_ONLY
static int	EventRequest_Set_COMMAND Set an event request.
static int	Field_COMMAND_SET
static int	InterfaceType_COMMAND_SET
static int	InvokeOptions_INVOKE_NONVIRTUAL
static int	InvokeOptions_INVOKE_SINGLE_THREADED
static int	Method_Bytecodes_COMMAND Retrieve the method's bytecodes as defined in the JVM Specification.
static int	Method_COMMAND_SET
static int	Method_IsObsolete_COMMAND Determine if this method is obsolete.
static int	Method_LineTable_COMMAND Returns line number information for the method.
static int	Method_VariableTable_COMMAND Returns variable information for the method.
static int	Method_VariableTableWithGeneric_COMMAND Returns variable information for the method, including generic signatures for the variables.
static int	ObjectReference_COMMAND_SET
static int	ObjectReference_DisableCollection_COMMAND Prevents garbage collection for the given object.
static int	ObjectReference_EnableCollection_COMMAND Permits garbage collection for this object.
static int	ObjectReference_GetValues_COMMAND Returns the value of one or more instance fields.
static int	ObjectReference_InvokeMethod_COMMAND Invokes a instance method.
static int	ObjectReference_IsCollected_COMMAND Determines whether an object has been garbage collected in the target VM.
static int	ObjectReference_MonitorInfo_COMMAND Returns monitor information for an object.
static int	ObjectReference_ReferenceType_COMMAND Returns the runtime type of the object.
static int	ObjectReference_SetValues_COMMAND Sets the value of one or more instance fields.
static int	ReferenceType_ClassLoader_COMMAND Returns the instance of java.lang.ClassLoader which loaded a given reference type.
static int	ReferenceType_ClassObject_COMMAND Returns the class object corresponding to this type.
static int	ReferenceType_COMMAND_SET
static int	ReferenceType_Fields_COMMAND Returns information for each field in a reference type.
static int	ReferenceType_FieldsWithGeneric_COMMAND Returns information, including the generic signature if any, for each field in a reference type.
static int	ReferenceType_GetValues_COMMAND Returns the value of one or more static fields of the reference type.
static int	ReferenceType_Interfaces_COMMAND Returns the interfaces declared as implemented by this class.
static int	ReferenceType_Methods_COMMAND Returns information for each method in a reference type.
static int	ReferenceType_MethodsWithGeneric_COMMAND Returns information, including the generic signature if any, for each method in a reference type.
static int	ReferenceType_Modifiers_COMMAND Returns the modifiers (also known as access flags) for a reference type.
static int	ReferenceType_NestedTypes_COMMAND Returns the classes and interfaces directly nested within this type.
static int	ReferenceType_Signature_COMMAND Returns the JNI signature of a reference type.
static int	ReferenceType_SignatureWithGeneric_COMMAND Returns the JNI signature of a reference type along with the generic signature if there is one.
static int	ReferenceType_SourceDebugExtension_COMMAND Returns the value of the SourceDebugExtension attribute.
static int	ReferenceType_SourceFile_COMMAND Returns the name of source file in which a reference type was declared.
static int	ReferenceType_Status_COMMAND Returns the current status of the reference type.
static int	StackFrame_COMMAND_SET
static int	StackFrame_GetValues_COMMAND Returns the value of one or more local variables in a given frame.
static int	StackFrame_PopFrames_COMMAND Pop stack frames, thru and including 'frame'.
static int	StackFrame_SetValues_COMMAND Sets the value of one or more local variables.
static int	StackFrame_ThisObject_COMMAND Returns the value of the 'this' reference for this frame.
static int	StepDepth_INTO
static int	StepDepth_OUT
static int	StepDepth_OVER
static int	StepSize_LINE
static int	StepSize_MIN
static int	StringReference_COMMAND_SET
static int	StringReference_Value_COMMAND Returns the characters contained in the string.
static int	SuspendPolicy_ALL
static int	SuspendPolicy_EVENT_THREAD
static int	SuspendPolicy_NONE
static int	SuspendStatus_SUSPEND_STATUS_SUSPENDED
static int	Tag_ARRAY
static int	Tag_BOOLEAN
static int	Tag_BYTE
static int	Tag_CHAR
static int	Tag_CLASS_LOADER
static int	Tag_CLASS_OBJECT
static int	Tag_DOUBLE
static int	Tag_FLOAT
static int	Tag_INT
static int	Tag_LONG
static int	Tag_OBJECT
static int	Tag_SHORT
static int	Tag_STRING
static int	Tag_THREAD
static int	Tag_THREAD_GROUP
static int	Tag_VOID
static int	ThreadGroupReference_Children_COMMAND Returns the threads and thread groups directly contained in this thread group.
static int	ThreadGroupReference_COMMAND_SET
static int	ThreadGroupReference_Name_COMMAND Returns the thread group name.
static int	ThreadGroupReference_Parent_COMMAND Returns the thread group, if any, which contains a given thread group.
static int	ThreadReference_COMMAND_SET
static int	ThreadReference_CurrentContendedMonitor_COMMAND Returns the object, if any, for which this thread is waiting for monitor entry or with java.lang.Object.wait.
static int	ThreadReference_FrameCount_COMMAND Returns the count of frames on this thread's stack.
static int	ThreadReference_Frames_COMMAND Returns the current call stack of a suspended thread.
static int	ThreadReference_Interrupt_COMMAND Interrupt the thread, as if done by java.lang.Thread.interrupt
static int	ThreadReference_Name_COMMAND Returns the thread name.
static int	ThreadReference_OwnedMonitors_COMMAND Returns the objects whose monitors have been entered by this thread.
static int	ThreadReference_Resume_COMMAND Resumes the execution of a given thread.
static int	ThreadReference_Status_COMMAND Returns the current status of a thread.
static int	ThreadReference_Stop_COMMAND Stops the thread with an asynchronous exception, as if done by java.lang.Thread.stop
static int	ThreadReference_Suspend_COMMAND Suspends the thread.
static int	ThreadReference_SuspendCount_COMMAND Get the suspend count for this thread.
static int	ThreadReference_ThreadGroup_COMMAND Returns the thread group that contains a given thread.
static int	ThreadStatus_MONITOR
static int	ThreadStatus_RUNNING
static int	ThreadStatus_SLEEPING
static int	ThreadStatus_WAIT
static int	ThreadStatus_ZOMBIE
static int	TypeTag_ARRAY
static int	TypeTag_CLASS
static int	TypeTag_INTERFACE
static int	VirtualMachine_AllClasses_COMMAND Returns reference types for all classes currently loaded by the target VM.
static int	VirtualMachine_AllClassesWithGeneric_COMMAND Returns reference types for all classes currently loaded by the target VM.
static int	VirtualMachine_AllThreads_COMMAND Returns all threads currently running in the target VM .
static int	VirtualMachine_Capabilities_COMMAND Retrieve this VM's capabilities.
static int	VirtualMachine_CapabilitiesNew_COMMAND Retrieve all of this VM's capabilities.
static int	VirtualMachine_ClassesBySignature_COMMAND Returns reference types for all the classes loaded by the target VM which match the given signature.
static int	VirtualMachine_ClassPaths_COMMAND Retrieve the classpath and bootclasspath of the target VM.
static int	VirtualMachine_COMMAND_SET
static int	VirtualMachine_CreateString_COMMAND Creates a new string object in the target VM and returns its id.
static int	VirtualMachine_Dispose_COMMAND Invalidates this virtual machine mirror.
static int	VirtualMachine_DisposeObjects_COMMAND Releases a list of object IDs.
static int	VirtualMachine_Exit_COMMAND Terminates the target VM with the given exit code.
static int	VirtualMachine_HoldEvents_COMMAND Tells the target VM to stop sending events.
static int	VirtualMachine_IDSizes_COMMAND Returns the sizes of variably-sized data types in the target VM.
static int	VirtualMachine_RedefineClassesCOMMAND Installs new class definitions.
static int	VirtualMachine_ReleaseEvents_COMMAND Tells the target VM to continue sending events.
static int	VirtualMachine_Resume_COMMAND Resumes execution of the application after the suspend command or an event has stopped it.
static int	VirtualMachine_SetDefaultStratum_COMMAND Set the default stratum.
static int	VirtualMachine_Suspend_COMMAND Suspends the execution of the application running in the target VM.
static int	VirtualMachine_TopLevelThreadGroups_COMMAND Returns all thread groups that do not have a parent.
static int	VirtualMachine_Version_COMMAND Returns the JDWP version implemented by the target VM.

Method Summary

static byte	getTag(Klass klass) Given a klass, returns the corresponding com.sun.squawk.debugger.JDWP.Tag value.
static byte	getTypeTag(Klass klass) Gets the JDWP.TypeTag_... value corresponding to a given class.
static boolean	isReferenceTag(int tag) Return true if the tag represents an reference type JDWP Tag value.
static boolean	isValidTag(int tag) Return true if the tag is a valid JDWP Tag value.
static boolean	isValidTypeTag(int typeTag) Return true if the tag is a valid JDWP Type Tag value.

Methods inherited from class java.lang.Object

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

Field Detail

VirtualMachine_COMMAND_SET

public static final int VirtualMachine_COMMAND_SET

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Constant Field Values

VirtualMachine_Version_COMMAND

public static final int VirtualMachine_Version_COMMAND

Returns the JDWP version implemented by the target VM. The version string format is implementation dependent.

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Constant Field Values

VirtualMachine_ClassesBySignature_COMMAND

public static final int VirtualMachine_ClassesBySignature_COMMAND

Returns reference types for all the classes loaded by the target VM which match the given signature. Multple reference types will be returned if two or more class loaders have loaded a class of the same name. The search is confined to loaded classes only; no attempt is made to load a class of the given signature.

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Constant Field Values

VirtualMachine_AllClasses_COMMAND

public static final int VirtualMachine_AllClasses_COMMAND

Returns reference types for all classes currently loaded by the target VM.

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Constant Field Values

VirtualMachine_AllThreads_COMMAND

public static final int VirtualMachine_AllThreads_COMMAND

Returns all threads currently running in the target VM . The returned list contains threads created through java.lang.Thread, all native threads attached to the target VM through JNI, and system threads created by the target VM. Threads that have not yet been started and threads that have completed their execution are not included in the returned list.

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Constant Field Values

VirtualMachine_TopLevelThreadGroups_COMMAND

public static final int VirtualMachine_TopLevelThreadGroups_COMMAND

Returns all thread groups that do not have a parent. This command may be used as the first step in building a tree (or trees) of the existing thread groups.

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Constant Field Values

VirtualMachine_Dispose_COMMAND

public static final int VirtualMachine_Dispose_COMMAND

Invalidates this virtual machine mirror. The communication channel to the target VM is closed, and the target VM prepares to accept another subsequent connection from this debugger or another debugger, including the following tasks:

• All event requests are cancelled.
• All threads suspended by the thread-level resume command or the VM-level resume command are resumed as many times as necessary for them to run.
• Garbage collection is re-enabled in all cases where it was disabled

Any current method invocations executing in the target VM are continued after the disconnection. Upon completion of any such method invocation, the invoking thread continues from the location where it was originally stopped.

Resources originating in this VirtualMachine (ObjectReferences, ReferenceTypes, etc.) will become invalid.

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Constant Field Values

VirtualMachine_IDSizes_COMMAND

public static final int VirtualMachine_IDSizes_COMMAND

Returns the sizes of variably-sized data types in the target VM. The returned values indicate the number of bytes used by the identifiers in command and reply packets.

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Constant Field Values

VirtualMachine_Suspend_COMMAND

public static final int VirtualMachine_Suspend_COMMAND

Suspends the execution of the application running in the target VM. All Java threads currently running will be suspended.

Unlike java.lang.Thread.suspend, suspends of both the virtual machine and individual threads are counted. Before a thread will run again, it must be resumed through the VM-level resume command or the thread-level resume command the same number of times it has been suspended.

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Constant Field Values

VirtualMachine_Resume_COMMAND

public static final int VirtualMachine_Resume_COMMAND

Resumes execution of the application after the suspend command or an event has stopped it. Suspensions of the Virtual Machine and individual threads are counted. If a particular thread is suspended n times, it must resumed n times before it will continue.

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Constant Field Values

VirtualMachine_Exit_COMMAND

public static final int VirtualMachine_Exit_COMMAND

Terminates the target VM with the given exit code. On some platforms, the exit code might be truncated, for example, to the low order 8 bits. All ids previously returned from the target VM become invalid. Threads running in the VM are abruptly terminated. A thread death exception is not thrown and finally blocks are not run.

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Constant Field Values

VirtualMachine_CreateString_COMMAND

public static final int VirtualMachine_CreateString_COMMAND

Creates a new string object in the target VM and returns its id.

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Constant Field Values

VirtualMachine_Capabilities_COMMAND

public static final int VirtualMachine_Capabilities_COMMAND

Retrieve this VM's capabilities. The capabilities are returned as booleans, each indicating the presence or absence of a capability. The commands associated with each capability will return the NOT_IMPLEMENTED error if the cabability is not available.

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Constant Field Values

VirtualMachine_ClassPaths_COMMAND

public static final int VirtualMachine_ClassPaths_COMMAND

Retrieve the classpath and bootclasspath of the target VM. If the classpath is not defined, returns an empty list. If the bootclasspath is not defined returns an empty list.

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Constant Field Values

VirtualMachine_DisposeObjects_COMMAND

public static final int VirtualMachine_DisposeObjects_COMMAND

Releases a list of object IDs. For each object in the list, the following applies. The count of references held by the back-end (the reference count) will be decremented by refCnt. If thereafter the reference count is less than or equal to zero, the ID is freed. Any back-end resources associated with the freed ID may be freed, and if garbage collection was disabled for the object, it will be re-enabled. The sender of this command promises that no further commands will be sent referencing a freed ID.

Use of this command is not required. If it is not sent, resources associated with each ID will be freed by the back-end at some time after the corresponding object is garbage collected. It is most useful to use this command to reduce the load on the back-end if a very large number of objects has been retrieved from the back-end (a large array, for example) but may not be garbage collected any time soon.

IDs may be re-used by the back-end after they have been freed with this command. This description assumes reference counting, a back-end may use any implementation which operates equivalently.

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Constant Field Values

VirtualMachine_HoldEvents_COMMAND

public static final int VirtualMachine_HoldEvents_COMMAND

Tells the target VM to stop sending events. Events are not discarded; they are held until a subsequent ReleaseEvents command is sent. This command is useful to control the number of events sent to the debugger VM in situations where very large numbers of events are generated. While events are held by the debugger back-end, application execution may be frozen by the debugger back-end to prevent buffer overflows on the back end. Responses to commands are never held and are not affected by this command. If events are already being held, this command is ignored.

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Constant Field Values

VirtualMachine_ReleaseEvents_COMMAND

public static final int VirtualMachine_ReleaseEvents_COMMAND

Tells the target VM to continue sending events. This command is used to restore normal activity after a HoldEvents command. If there is no current HoldEvents command in effect, this command is ignored.

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Constant Field Values

VirtualMachine_CapabilitiesNew_COMMAND

public static final int VirtualMachine_CapabilitiesNew_COMMAND

Retrieve all of this VM's capabilities. The capabilities are returned as booleans, each indicating the presence or absence of a capability. The commands associated with each capability will return the NOT_IMPLEMENTED error if the cabability is not available. Since JDWP version 1.4.

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Constant Field Values

VirtualMachine_RedefineClassesCOMMAND

public static final int VirtualMachine_RedefineClassesCOMMAND

Installs new class definitions.

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Constant Field Values

VirtualMachine_SetDefaultStratum_COMMAND

public static final int VirtualMachine_SetDefaultStratum_COMMAND

Set the default stratum.

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Constant Field Values

VirtualMachine_AllClassesWithGeneric_COMMAND

public static final int VirtualMachine_AllClassesWithGeneric_COMMAND

Returns reference types for all classes currently loaded by the target VM. Both the JNI signature and the generic signature are returned for each class. Generic signatures are described in the signature attribute section in the Java Virtual Machine Specification, 3rd Edition. Since JDWP version 1.5.

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Constant Field Values

ReferenceType_COMMAND_SET

public static final int ReferenceType_COMMAND_SET

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Constant Field Values

ReferenceType_Signature_COMMAND

public static final int ReferenceType_Signature_COMMAND

Returns the JNI signature of a reference type. JNI signature formats are described in the Java Native Inteface Specification

For primitive classes the returned signature is the signature of the corresponding primitive type; for example, "I" is returned as the signature of the class represented by java.lang.Integer.TYPE.

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Constant Field Values

ReferenceType_ClassLoader_COMMAND

public static final int ReferenceType_ClassLoader_COMMAND

Returns the instance of java.lang.ClassLoader which loaded a given reference type. If the reference type was loaded by the system class loader, the returned object ID is null.

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Constant Field Values

ReferenceType_Modifiers_COMMAND

public static final int ReferenceType_Modifiers_COMMAND

Returns the modifiers (also known as access flags) for a reference type. The returned bit mask contains information on the declaration of the reference type. If the reference type is an array or a primitive class (for example, java.lang.Integer.TYPE), the value of the returned bit mask is undefined.

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Constant Field Values

ReferenceType_Fields_COMMAND

public static final int ReferenceType_Fields_COMMAND

Returns information for each field in a reference type. Inherited fields are not included. The field list will include any synthetic fields created by the compiler. Fields are returned in the order they occur in the class file.

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Constant Field Values

ReferenceType_Methods_COMMAND

public static final int ReferenceType_Methods_COMMAND

Returns information for each method in a reference type. Inherited methods are not included. The list of methods will include constructors (identified with the name "<init>"), the initialization method (identified with the name "<clinit>") if present, and any synthetic methods created by the compiler. Methods are returned in the order they occur in the class file.

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Constant Field Values

ReferenceType_GetValues_COMMAND

public static final int ReferenceType_GetValues_COMMAND

Returns the value of one or more static fields of the reference type. Each field must be member of the reference type or one of its superclasses, superinterfaces, or implemented interfaces. Access control is not enforced; for example, the values of private fields can be obtained.

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Constant Field Values

ReferenceType_SourceFile_COMMAND

public static final int ReferenceType_SourceFile_COMMAND

Returns the name of source file in which a reference type was declared.

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Constant Field Values

ReferenceType_NestedTypes_COMMAND

public static final int ReferenceType_NestedTypes_COMMAND

Returns the classes and interfaces directly nested within this type. Types further nested within those types are not included.

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Constant Field Values

ReferenceType_Status_COMMAND

public static final int ReferenceType_Status_COMMAND

Returns the current status of the reference type. The status indicates the extent to which the reference type has been initialized, as described in the VM specification. The returned status bits are undefined for array types and for primitive classes (such as java.lang.Integer.TYPE).

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Constant Field Values

ReferenceType_Interfaces_COMMAND

public static final int ReferenceType_Interfaces_COMMAND

Returns the interfaces declared as implemented by this class. Interfaces indirectly implemented (extended by the implemented interface or implemented by a superclass) are not included.

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Constant Field Values

ReferenceType_ClassObject_COMMAND

public static final int ReferenceType_ClassObject_COMMAND

Returns the class object corresponding to this type.

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Constant Field Values

ReferenceType_SourceDebugExtension_COMMAND

public static final int ReferenceType_SourceDebugExtension_COMMAND

Returns the value of the SourceDebugExtension attribute. Since JDWP version 1.4.

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Constant Field Values

ReferenceType_SignatureWithGeneric_COMMAND

public static final int ReferenceType_SignatureWithGeneric_COMMAND

Returns the JNI signature of a reference type along with the generic signature if there is one. Generic signatures are described in the signature attribute section in the Java Virtual Machine Specification, 3rd Edition. Since JDWP version 1.5.

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Constant Field Values

ReferenceType_FieldsWithGeneric_COMMAND

public static final int ReferenceType_FieldsWithGeneric_COMMAND

Returns information, including the generic signature if any, for each field in a reference type. Inherited fields are not included. The field list will include any synthetic fields created by the compiler. Fields are returned in the order they occur in the class file. Generic signatures are described in the signature attribute section in the Java Virtual Machine Specification, 3rd Edition. Since JDWP version 1.5.

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Constant Field Values

ReferenceType_MethodsWithGeneric_COMMAND

public static final int ReferenceType_MethodsWithGeneric_COMMAND

Returns information, including the generic signature if any, for each method in a reference type. Inherited methodss are not included. The list of methods will include constructors (identified with the name "<init>"), the initialization method (identified with the name "<clinit>") if present, and any synthetic methods created by the compiler. Methods are returned in the order they occur in the class file. Generic signatures are described in the signature attribute section in the Java Virtual Machine Specification, 3rd Edition. Since JDWP version 1.5.

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Constant Field Values

ClassType_COMMAND_SET

public static final int ClassType_COMMAND_SET

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Constant Field Values

ClassType_Superclass_COMMAND

public static final int ClassType_Superclass_COMMAND

Returns the immediate superclass of a class.

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Constant Field Values

ClassType_SetValues_COMMAND

public static final int ClassType_SetValues_COMMAND

Sets the value of one or more static fields. Each field must be member of the class type or one of its superclasses, superinterfaces, or implemented interfaces. Access control is not enforced; for example, the values of private fields can be set. Final fields cannot be set. For primitive values, the value's type must match the field's type exactly. For object values, there must exist a widening reference conversion from the value's type to the field's type and the field's type must be loaded.

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Constant Field Values

ClassType_InvokeMethod_COMMAND

public static final int ClassType_InvokeMethod_COMMAND

Invokes a static method. The method must be member of the class type or one of its superclasses, superinterfaces, or implemented interfaces. Access control is not enforced; for example, private methods can be invoked.

The method invocation will occur in the specified thread. Method invocation can occur only if the specified thread has been suspended by an event. Method invocation is not supported when the target VM has been suspended by the front-end.

The specified method is invoked with the arguments in the specified argument list. The method invocation is synchronous; the reply packet is not sent until the invoked method returns in the target VM. The return value (possibly the void value) is included in the reply packet. If the invoked method throws an exception, the exception object ID is set in the reply packet; otherwise, the exception object ID is null.

For primitive arguments, the argument value's type must match the argument's type exactly. For object arguments, there must exist a widening reference conversion from the argument value's type to the argument's type and the argument's type must be loaded.

By default, all threads in the target VM are resumed while the method is being invoked if they were previously suspended by an event or by command. This is done to prevent the deadlocks that will occur if any of the threads own monitors that will be needed by the invoked method. It is possible that breakpoints or other events might occur during the invocation. Note, however, that this implicit resume acts exactly like the ThreadReference resume command, so if the thread's suspend count is greater than 1, it will remain in a suspended state during the invocation. By default, when the invocation completes, all threads in the target VM are suspended, regardless their state before the invocation.

The resumption of other threads during the invoke can be prevented by specifying the INVOKE_SINGLE_THREADED bit flag in the options field; however, there is no protection against or recovery from the deadlocks described above, so this option should be used with great caution. Only the specified thread will be resumed (as described for all threads above). Upon completion of a single threaded invoke, the invoking thread will be suspended once again. Note that any threads started during the single threaded invocation will not be suspended when the invocation completes.

If the target VM is disconnected during the invoke (for example, through the VirtualMachine dispose command) the method invocation continues.

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Constant Field Values

ClassType_NewInstance_COMMAND

public static final int ClassType_NewInstance_COMMAND

Creates a new object of this type, invoking the specified constructor. The constructor method ID must be a member of the class type.

Instance creation will occur in the specified thread. Instance creation can occur only if the specified thread has been suspended by an event. Method invocation is not supported when the target VM has been suspended by the front-end.

The specified constructor is invoked with the arguments in the specified argument list. The constructor invocation is synchronous; the reply packet is not sent until the invoked method returns in the target VM. The return value (possibly the void value) is included in the reply packet. If the constructor throws an exception, the exception object ID is set in the reply packet; otherwise, the exception object ID is null.

For primitive arguments, the argument value's type must match the argument's type exactly. For object arguments, there must exist a widening reference conversion from the argument value's type to the argument's type and the argument's type must be loaded.

By default, all threads in the target VM are resumed while the method is being invoked if they were previously suspended by an event or by command. This is done to prevent the deadlocks that will occur if any of the threads own monitors that will be needed by the invoked method. It is possible that breakpoints or other events might occur during the invocation. Note, however, that this implicit resume acts exactly like the ThreadReference resume command, so if the thread's suspend count is greater than 1, it will remain in a suspended state during the invocation. By default, when the invocation completes, all threads in the target VM are suspended, regardless their state before the invocation.

The resumption of other threads during the invoke can be prevented by specifying the INVOKE_SINGLE_THREADED bit flag in the options field; however, there is no protection against or recovery from the deadlocks described above, so this option should be used with great caution. Only the specified thread will be resumed (as described for all threads above). Upon completion of a single threaded invoke, the invoking thread will be suspended once again. Note that any threads started during the single threaded invocation will not be suspended when the invocation completes.

If the target VM is disconnected during the invoke (for example, through the VirtualMachine dispose command) the method invocation continues.

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Constant Field Values

ArrayType_COMMAND_SET

public static final int ArrayType_COMMAND_SET

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Constant Field Values

ArrayType_NewInstance_COMMAND

public static final int ArrayType_NewInstance_COMMAND

Creates a new array object of this type with a given length.

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Constant Field Values

InterfaceType_COMMAND_SET

public static final int InterfaceType_COMMAND_SET

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Constant Field Values

Method_COMMAND_SET

public static final int Method_COMMAND_SET

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Constant Field Values

Method_LineTable_COMMAND

public static final int Method_LineTable_COMMAND

Returns line number information for the method. The line table maps source line numbers to the initial code index of the line. The line table is ordered by code index (from lowest to highest).

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Constant Field Values

Method_VariableTable_COMMAND

public static final int Method_VariableTable_COMMAND

Returns variable information for the method. The variable table includes arguments and locals declared within the method. For instance methods, the "this" reference is included in the table. Also, synthetic variables may be present.

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Constant Field Values

Method_Bytecodes_COMMAND

public static final int Method_Bytecodes_COMMAND

Retrieve the method's bytecodes as defined in the JVM Specification.

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Constant Field Values

Method_IsObsolete_COMMAND

public static final int Method_IsObsolete_COMMAND

Determine if this method is obsolete.

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Constant Field Values

Method_VariableTableWithGeneric_COMMAND

public static final int Method_VariableTableWithGeneric_COMMAND

Returns variable information for the method, including generic signatures for the variables. The variable table includes arguments and locals declared within the method. For instance methods, the "this" reference is included in the table. Also, synthetic variables may be present. Generic signatures are described in the signature attribute section in the Java Virtual Machine Specification, 3rd Edition. Since JDWP version 1.5.

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Constant Field Values

Field_COMMAND_SET

public static final int Field_COMMAND_SET

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Constant Field Values

ObjectReference_COMMAND_SET

public static final int ObjectReference_COMMAND_SET

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Constant Field Values

ObjectReference_ReferenceType_COMMAND

public static final int ObjectReference_ReferenceType_COMMAND

Returns the runtime type of the object. The runtime type will be a class or an array.

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Constant Field Values

ObjectReference_GetValues_COMMAND

public static final int ObjectReference_GetValues_COMMAND

Returns the value of one or more instance fields. Each field must be member of the object's type or one of its superclasses, superinterfaces, or implemented interfaces. Access control is not enforced; for example, the values of private fields can be obtained.

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Constant Field Values

ObjectReference_SetValues_COMMAND

public static final int ObjectReference_SetValues_COMMAND

Sets the value of one or more instance fields. Each field must be member of the object's type or one of its superclasses, superinterfaces, or implemented interfaces. Access control is not enforced; for example, the values of private fields can be set. For primitive values, the value's type must match the field's type exactly. For object values, there must be a widening reference conversion from the value's type to the field's type and the field's type must be loaded.

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Constant Field Values

ObjectReference_MonitorInfo_COMMAND

public static final int ObjectReference_MonitorInfo_COMMAND

Returns monitor information for an object. All threads int the VM must be suspended.

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Constant Field Values

ObjectReference_InvokeMethod_COMMAND

public static final int ObjectReference_InvokeMethod_COMMAND

Invokes a instance method. The method must be member of the object's type or one of its superclasses, superinterfaces, or implemented interfaces. Access control is not enforced; for example, private methods can be invoked.

The method invocation will occur in the specified thread. Method invocation can occur only if the specified thread has been suspended by an event. Method invocation is not supported when the target VM has been suspended by the front-end.

The specified method is invoked with the arguments in the specified argument list. The method invocation is synchronous; the reply packet is not sent until the invoked method returns in the target VM. The return value (possibly the void value) is included in the reply packet. If the invoked method throws an exception, the exception object ID is set in the reply packet; otherwise, the exception object ID is null.

For primitive arguments, the argument value's type must match the argument's type exactly. For object arguments, there must be a widening reference conversion from the argument value's type to the argument's type and the argument's type must be loaded.

By default, all threads in the target VM are resumed while the method is being invoked if they were previously suspended by an event or by command. This is done to prevent the deadlocks that will occur if any of the threads own monitors that will be needed by the invoked method. It is possible that breakpoints or other events might occur during the invocation. Note, however, that this implicit resume acts exactly like the ThreadReference resume command, so if the thread's suspend count is greater than 1, it will remain in a suspended state during the invocation. By default, when the invocation completes, all threads in the target VM are suspended, regardless their state before the invocation.

The resumption of other threads during the invoke can be prevented by specifying the INVOKE_SINGLE_THREADED bit flag in the options field; however, there is no protection against or recovery from the deadlocks described above, so this option should be used with great caution. Only the specified thread will be resumed (as described for all threads above). Upon completion of a single threaded invoke, the invoking thread will be suspended once again. Note that any threads started during the single threaded invocation will not be suspended when the invocation completes.

If the target VM is disconnected during the invoke (for example, through the VirtualMachine dispose command) the method invocation continues.

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Constant Field Values

ObjectReference_DisableCollection_COMMAND

public static final int ObjectReference_DisableCollection_COMMAND

Prevents garbage collection for the given object. By default all objects in back-end replies may be collected at any time the target VM is running. A call to this command guarantees that the object will not be collected. The EnableCollection command can be used to allow collection once again.

Note that while the target VM is suspended, no garbage collection will occur because all threads are suspended. The typical examination of variables, fields, and arrays during the suspension is safe without explicitly disabling garbage collection.

This method should be used sparingly, as it alters the pattern of garbage collection in the target VM and, consequently, may result in application behavior under the debugger that differs from its non-debugged behavior.

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Constant Field Values

ObjectReference_EnableCollection_COMMAND

public static final int ObjectReference_EnableCollection_COMMAND

Permits garbage collection for this object. By default all objects returned by the JDWP may be collected at any time the target VM is running. A call to this command is necessary only if garbage collection was previously disabled with the DisableCollection command.

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Constant Field Values

ObjectReference_IsCollected_COMMAND

public static final int ObjectReference_IsCollected_COMMAND

Determines whether an object has been garbage collected in the target VM.

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Constant Field Values

StringReference_COMMAND_SET

public static final int StringReference_COMMAND_SET

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Constant Field Values

StringReference_Value_COMMAND

public static final int StringReference_Value_COMMAND

Returns the characters contained in the string.

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Constant Field Values

ThreadReference_COMMAND_SET

public static final int ThreadReference_COMMAND_SET

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Constant Field Values

ThreadReference_Name_COMMAND

public static final int ThreadReference_Name_COMMAND

Returns the thread name.

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Constant Field Values

ThreadReference_Suspend_COMMAND

public static final int ThreadReference_Suspend_COMMAND

Suspends the thread.

Unlike java.lang.Thread.suspend(), suspends of both the virtual machine and individual threads are counted. Before a thread will run again, it must be resumed the same number of times it has been suspended.

Suspending single threads with command has the same dangers java.lang.Thread.suspend(). If the suspended thread holds a monitor needed by another running thread, deadlock is possible in the target VM (at least until the suspended thread is resumed again).

The suspended thread is guaranteed to remain suspended until resumed through one of the JDI resume methods mentioned above; the application in the target VM cannot resume the suspended thread through java.lang.Thread#resume.

Note that this doesn't change the status of the thread (see the ThreadStatus command.) For example, if it was Running, it will still appear running to other threads.

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Constant Field Values

ThreadReference_Resume_COMMAND

public static final int ThreadReference_Resume_COMMAND

Resumes the execution of a given thread. If this thread was not previously suspended by the front-end, calling this command has no effect. Otherwise, the count of pending suspends on this thread is decremented. If it is decremented to 0, the thread will continue to execute.

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Constant Field Values

ThreadReference_Status_COMMAND

public static final int ThreadReference_Status_COMMAND

Returns the current status of a thread. The thread status reply indicates the thread status the last time it was running. the suspend status provides information on the thread's suspension, if any.

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Constant Field Values

ThreadReference_ThreadGroup_COMMAND

public static final int ThreadReference_ThreadGroup_COMMAND

Returns the thread group that contains a given thread.

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Constant Field Values

ThreadReference_Frames_COMMAND

public static final int ThreadReference_Frames_COMMAND

Returns the current call stack of a suspended thread. The sequence of frames starts with the currently executing frame, followed by its caller, and so on. The thread must be suspended, and the returned frameID is valid only while the thread is suspended.

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Constant Field Values

ThreadReference_FrameCount_COMMAND

public static final int ThreadReference_FrameCount_COMMAND

Returns the count of frames on this thread's stack. The thread must be suspended, and the returned count is valid only while the thread is suspended. Returns JDWP.Event_errorThreadNotSuspended if not suspended.

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Constant Field Values

ThreadReference_OwnedMonitors_COMMAND

public static final int ThreadReference_OwnedMonitors_COMMAND

Returns the objects whose monitors have been entered by this thread. The thread must be suspended, and the returned information is relevant only while the thread is suspended.

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Constant Field Values

ThreadReference_CurrentContendedMonitor_COMMAND

public static final int ThreadReference_CurrentContendedMonitor_COMMAND

Returns the object, if any, for which this thread is waiting for monitor entry or with java.lang.Object.wait. The thread must be suspended, and the returned information is relevant only while the thread is suspended.

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Constant Field Values

ThreadReference_Stop_COMMAND

public static final int ThreadReference_Stop_COMMAND

Stops the thread with an asynchronous exception, as if done by java.lang.Thread.stop

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Constant Field Values

ThreadReference_Interrupt_COMMAND

public static final int ThreadReference_Interrupt_COMMAND

Interrupt the thread, as if done by java.lang.Thread.interrupt

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Constant Field Values

ThreadReference_SuspendCount_COMMAND

public static final int ThreadReference_SuspendCount_COMMAND

Get the suspend count for this thread. The suspend count is the number of times the thread has been suspended through the thread-level or VM-level suspend commands without a corresponding resume

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Constant Field Values

ThreadGroupReference_COMMAND_SET

public static final int ThreadGroupReference_COMMAND_SET

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Constant Field Values

ThreadGroupReference_Name_COMMAND

public static final int ThreadGroupReference_Name_COMMAND

Returns the thread group name.

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Constant Field Values

ThreadGroupReference_Parent_COMMAND

public static final int ThreadGroupReference_Parent_COMMAND

Returns the thread group, if any, which contains a given thread group.

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Constant Field Values

ThreadGroupReference_Children_COMMAND

public static final int ThreadGroupReference_Children_COMMAND

Returns the threads and thread groups directly contained in this thread group. Threads and thread groups in child thread groups are not included.

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Constant Field Values

ArrayReference_COMMAND_SET

public static final int ArrayReference_COMMAND_SET

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Constant Field Values

ArrayReference_Length_COMMAND

public static final int ArrayReference_Length_COMMAND

Returns the number of components in a given array.

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Constant Field Values

ArrayReference_GetValues_COMMAND

public static final int ArrayReference_GetValues_COMMAND

Returns a range of array components. The specified range must be within the bounds of the array.

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Constant Field Values

ArrayReference_SetValues_COMMAND

public static final int ArrayReference_SetValues_COMMAND

Sets a range of array components. The specified range must be within the bounds of the array. For primitive values, each value's type must match the array component type exactly. For object values, there must be a widening reference conversion from the value's type to the array component type and the array component type must be loaded.

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Constant Field Values

ClassLoaderReference_COMMAND_SET

public static final int ClassLoaderReference_COMMAND_SET

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Constant Field Values

ClassLoaderReference_VisibleClasses_COMMAND

public static final int ClassLoaderReference_VisibleClasses_COMMAND

Returns a list of all classes which this class loader has been requested to load. This class loader is considered to be an initiating class loader for each class in the returned list. The list contains each reference type defined by this loader and any types for which loading was delegated by this class loader to another class loader.

The visible class list has useful properties with respect to the type namespace. A particular type name will occur at most once in the list. Each field or variable declared with that type name in a class defined by this class loader must be resolved to that single type.

No ordering of the returned list is guaranteed.

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Constant Field Values

EventRequest_COMMAND_SET

public static final int EventRequest_COMMAND_SET

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Constant Field Values

EventRequest_Set_COMMAND

public static final int EventRequest_Set_COMMAND

Set an event request. When the event described by this request occurs, an event is sent from the target VM.

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Constant Field Values

EventRequest_Clear_COMMAND

public static final int EventRequest_Clear_COMMAND

Clear an event request.

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Constant Field Values

EventRequest_ClearAllBreakpoints_COMMAND

public static final int EventRequest_ClearAllBreakpoints_COMMAND

Removes all set breakpoints.

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Constant Field Values

EventRequest_MOD_COUNT

public static final int EventRequest_MOD_COUNT

Modifier kind values that make events conditional. Most are NOT supported by SDWP or Squawk.

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Constant Field Values

EventRequest_MOD_CONDITIONAL

public static final int EventRequest_MOD_CONDITIONAL

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Constant Field Values

EventRequest_MOD_THREAD_ONLY

public static final int EventRequest_MOD_THREAD_ONLY

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Constant Field Values

EventRequest_MOD_CLASS_ONLY

public static final int EventRequest_MOD_CLASS_ONLY

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Constant Field Values

EventRequest_MOD_CLASS_MATCH

public static final int EventRequest_MOD_CLASS_MATCH

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Constant Field Values

EventRequest_MOD_CLASS_EXCLUDE

public static final int EventRequest_MOD_CLASS_EXCLUDE

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Constant Field Values

EventRequest_MOD_LOCATION_ONLY

public static final int EventRequest_MOD_LOCATION_ONLY

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Constant Field Values

EventRequest_MOD_EXCEPTION_ONLY

public static final int EventRequest_MOD_EXCEPTION_ONLY

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Constant Field Values

EventRequest_MOD_FIELD_ONLY

public static final int EventRequest_MOD_FIELD_ONLY

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Constant Field Values

EventRequest_MOD_STEP

public static final int EventRequest_MOD_STEP

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Constant Field Values

EventRequest_MOD_INSTANCE_ONLY

public static final int EventRequest_MOD_INSTANCE_ONLY

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Constant Field Values

StackFrame_COMMAND_SET

public static final int StackFrame_COMMAND_SET

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Constant Field Values

StackFrame_GetValues_COMMAND

public static final int StackFrame_GetValues_COMMAND

Returns the value of one or more local variables in a given frame. Each variable must be visible at the frame's code index. Even if local variable information is not available, values can be retrieved if the front-end is able to determine the correct local variable index. (Typically, this index can be determined for method arguments from the method signature without access to the local variable table information.)

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Constant Field Values

StackFrame_SetValues_COMMAND

public static final int StackFrame_SetValues_COMMAND

Sets the value of one or more local variables. Each variable must be visible at the current frame code index. For primitive values, the value's type must match the variable's type exactly. For object values, there must be a widening reference conversion from the value's type to the variable's type and the variable's type must be loaded.

Even if local variable information is not available, values can be set, if the front-end is able to determine the correct local variable index. (Typically, this index can be determined for method arguments from the method signature without access to the local variable table information.)

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Constant Field Values

StackFrame_ThisObject_COMMAND

public static final int StackFrame_ThisObject_COMMAND

Returns the value of the 'this' reference for this frame. If the frame's method is static or native, the reply will contain the null object reference.

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Constant Field Values

StackFrame_PopFrames_COMMAND

public static final int StackFrame_PopFrames_COMMAND

Pop stack frames, thru and including 'frame'. Since JDWP version 1.4.

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Constant Field Values

ClassObjectReference_COMMAND_SET

public static final int ClassObjectReference_COMMAND_SET

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Constant Field Values

ClassObjectReference_ReflectedType_COMMAND

public static final int ClassObjectReference_ReflectedType_COMMAND

Returns the reference type reflected by this class object.

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Constant Field Values

Event_COMMAND_SET

public static final int Event_COMMAND_SET

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Constant Field Values

Event_Composite_COMMAND

public static final int Event_Composite_COMMAND

Several events may occur at a given time in the target VM. For example, there may be more than one breakpoint request for a given location or you might single step to the same location as a breakpoint request. These events are delivered together as a composite event. For uniformity, a composite event is always used to deliver events, even if there is only one event to report.

The events that are grouped in a composite event are restricted in the following ways:

• Always singleton composite events:
  • VM Start Event
  • VM Death Event
• Only with other thread start events for the same thread:
  • Thread Start Event
• Only with other thread death events for the same thread:
  • Thread Death Event
• Only with other class prepare events for the same class:
  • Class Prepare Event}
• Only with other class unload events for the same class:
  • Class Unload Event
• Only with other access watchpoint events for the same field access:
  • Access Watchpoint Event
• Only with other modification watchpoint events for the same field modification:
  • Modification Watchpoint Event
• Only with other ExceptionEvents for the same exception occurrance:
  • ExceptionEvent
• Only with other members of this group, at the same location and in the same thread:
  • Breakpoint Event
  • Step Event
  • Method Entry Event
  • Method Exit Event

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Constant Field Values

Error_NONE

public static final int Error_NONE

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Constant Field Values

Error_INVALID_THREAD

public static final int Error_INVALID_THREAD

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Constant Field Values

Error_INVALID_THREAD_GROUP

public static final int Error_INVALID_THREAD_GROUP

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Constant Field Values

Error_INVALID_PRIORITY

public static final int Error_INVALID_PRIORITY

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Constant Field Values

Error_THREAD_NOT_SUSPENDED

public static final int Error_THREAD_NOT_SUSPENDED

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Constant Field Values

Error_THREAD_SUSPENDED

public static final int Error_THREAD_SUSPENDED

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Constant Field Values

Error_INVALID_OBJECT

public static final int Error_INVALID_OBJECT

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Constant Field Values

Error_INVALID_CLASS

public static final int Error_INVALID_CLASS

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Constant Field Values

Error_CLASS_NOT_PREPARED

public static final int Error_CLASS_NOT_PREPARED

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Constant Field Values

Error_INVALID_METHODID

public static final int Error_INVALID_METHODID

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Constant Field Values

Error_INVALID_LOCATION

public static final int Error_INVALID_LOCATION

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Constant Field Values

Error_INVALID_FIELDID

public static final int Error_INVALID_FIELDID

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Constant Field Values

Error_INVALID_FRAMEID

public static final int Error_INVALID_FRAMEID

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Constant Field Values

Error_NO_MORE_FRAMES

public static final int Error_NO_MORE_FRAMES

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Constant Field Values

Error_OPAQUE_FRAME

public static final int Error_OPAQUE_FRAME

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Constant Field Values

Error_NOT_CURRENT_FRAME

public static final int Error_NOT_CURRENT_FRAME

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Constant Field Values

Error_TYPE_MISMATCH

public static final int Error_TYPE_MISMATCH

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Constant Field Values

Error_INVALID_SLOT

public static final int Error_INVALID_SLOT

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Constant Field Values

Error_DUPLICATE

public static final int Error_DUPLICATE

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Constant Field Values

Error_NOT_FOUND

public static final int Error_NOT_FOUND

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Constant Field Values

Error_INVALID_MONITOR

public static final int Error_INVALID_MONITOR

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Constant Field Values

Error_NOT_MONITOR_OWNER

public static final int Error_NOT_MONITOR_OWNER

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Constant Field Values

Error_INTERRUPT

public static final int Error_INTERRUPT

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Constant Field Values

Error_INVALID_CLASS_FORMAT

public static final int Error_INVALID_CLASS_FORMAT

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Constant Field Values

Error_CIRCULAR_CLASS_DEFINITION

public static final int Error_CIRCULAR_CLASS_DEFINITION

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Constant Field Values

Error_FAILS_VERIFICATION

public static final int Error_FAILS_VERIFICATION

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Constant Field Values

Error_ADD_METHOD_NOT_IMPLEMENTED

public static final int Error_ADD_METHOD_NOT_IMPLEMENTED

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Constant Field Values

Error_SCHEMA_CHANGE_NOT_IMPLEMENTED

public static final int Error_SCHEMA_CHANGE_NOT_IMPLEMENTED

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Constant Field Values

Error_INVALID_TYPESTATE

public static final int Error_INVALID_TYPESTATE

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Constant Field Values

Error_HIERARCHY_CHANGE_NOT_IMPLEMENTED

public static final int Error_HIERARCHY_CHANGE_NOT_IMPLEMENTED

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Constant Field Values

Error_DELETE_METHOD_NOT_IMPLEMENTED

public static final int Error_DELETE_METHOD_NOT_IMPLEMENTED

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Constant Field Values

Error_UNSUPPORTED_VERSION

public static final int Error_UNSUPPORTED_VERSION

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Constant Field Values

Error_NAMES_DONT_MATCH

public static final int Error_NAMES_DONT_MATCH

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Constant Field Values

Error_CLASS_MODIFIERS_CHANGE_NOT_IMPLEMENTED

public static final int Error_CLASS_MODIFIERS_CHANGE_NOT_IMPLEMENTED

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Constant Field Values

Error_METHOD_MODIFIERS_CHANGE_NOT_IMPLEMENTED

public static final int Error_METHOD_MODIFIERS_CHANGE_NOT_IMPLEMENTED

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Constant Field Values

Error_NOT_IMPLEMENTED

public static final int Error_NOT_IMPLEMENTED

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Constant Field Values

Error_NULL_POINTER

public static final int Error_NULL_POINTER

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Constant Field Values

Error_ABSENT_INFORMATION

public static final int Error_ABSENT_INFORMATION

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Constant Field Values

Error_INVALID_EVENT_TYPE

public static final int Error_INVALID_EVENT_TYPE

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Constant Field Values

Error_ILLEGAL_ARGUMENT

public static final int Error_ILLEGAL_ARGUMENT

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Constant Field Values

Error_OUT_OF_MEMORY

public static final int Error_OUT_OF_MEMORY

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Constant Field Values

Error_ACCESS_DENIED

public static final int Error_ACCESS_DENIED

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Constant Field Values

Error_VM_DEAD

public static final int Error_VM_DEAD

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Constant Field Values

Error_INTERNAL

public static final int Error_INTERNAL

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Constant Field Values

Error_UNATTACHED_THREAD

public static final int Error_UNATTACHED_THREAD

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Constant Field Values

Error_INVALID_TAG

public static final int Error_INVALID_TAG

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Constant Field Values

Error_ALREADY_INVOKING

public static final int Error_ALREADY_INVOKING

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Constant Field Values

Error_INVALID_INDEX

public static final int Error_INVALID_INDEX

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Constant Field Values

Error_INVALID_LENGTH

public static final int Error_INVALID_LENGTH

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Constant Field Values

Error_INVALID_STRING

public static final int Error_INVALID_STRING

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Constant Field Values

Error_INVALID_CLASS_LOADER

public static final int Error_INVALID_CLASS_LOADER

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Constant Field Values

Error_INVALID_ARRAY

public static final int Error_INVALID_ARRAY

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Constant Field Values

Error_TRANSPORT_LOAD

public static final int Error_TRANSPORT_LOAD

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Constant Field Values

Error_TRANSPORT_INIT

public static final int Error_TRANSPORT_INIT

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Constant Field Values

Error_NATIVE_METHOD

public static final int Error_NATIVE_METHOD

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Constant Field Values

Error_INVALID_COUNT

public static final int Error_INVALID_COUNT

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Constant Field Values

EventKind_VM_DISCONNECTED

public static final int EventKind_VM_DISCONNECTED

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Constant Field Values

EventKind_VM_START

public static final int EventKind_VM_START

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Constant Field Values

EventKind_THREAD_DEATH

public static final int EventKind_THREAD_DEATH

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Constant Field Values

EventKind_SINGLE_STEP

public static final int EventKind_SINGLE_STEP

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Constant Field Values

EventKind_BREAKPOINT

public static final int EventKind_BREAKPOINT

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Constant Field Values

EventKind_FRAME_POP

public static final int EventKind_FRAME_POP

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Constant Field Values

EventKind_EXCEPTION

public static final int EventKind_EXCEPTION

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Constant Field Values

EventKind_USER_DEFINED

public static final int EventKind_USER_DEFINED

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Constant Field Values

EventKind_THREAD_START

public static final int EventKind_THREAD_START

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Constant Field Values

EventKind_THREAD_END

public static final int EventKind_THREAD_END

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Constant Field Values

EventKind_CLASS_PREPARE

public static final int EventKind_CLASS_PREPARE

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Constant Field Values

EventKind_CLASS_UNLOAD

public static final int EventKind_CLASS_UNLOAD

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Constant Field Values

EventKind_CLASS_LOAD

public static final int EventKind_CLASS_LOAD

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Constant Field Values

EventKind_FIELD_ACCESS

public static final int EventKind_FIELD_ACCESS

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Constant Field Values

EventKind_FIELD_MODIFICATION

public static final int EventKind_FIELD_MODIFICATION

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Constant Field Values

EventKind_EXCEPTION_CATCH

public static final int EventKind_EXCEPTION_CATCH

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Constant Field Values

EventKind_METHOD_ENTRY

public static final int EventKind_METHOD_ENTRY

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Constant Field Values

EventKind_METHOD_EXIT

public static final int EventKind_METHOD_EXIT

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Constant Field Values

EventKind_VM_INIT

public static final int EventKind_VM_INIT

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Constant Field Values

EventKind_VM_DEATH

public static final int EventKind_VM_DEATH

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Constant Field Values

ThreadStatus_ZOMBIE

public static final int ThreadStatus_ZOMBIE

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Constant Field Values

ThreadStatus_RUNNING

public static final int ThreadStatus_RUNNING

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Constant Field Values

ThreadStatus_SLEEPING

public static final int ThreadStatus_SLEEPING

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Constant Field Values

ThreadStatus_MONITOR

public static final int ThreadStatus_MONITOR

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Constant Field Values

ThreadStatus_WAIT

public static final int ThreadStatus_WAIT

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Constant Field Values

SuspendStatus_SUSPEND_STATUS_SUSPENDED

public static final int SuspendStatus_SUSPEND_STATUS_SUSPENDED

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Constant Field Values

ClassStatus_VERIFIED

public static final int ClassStatus_VERIFIED

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Constant Field Values

ClassStatus_PREPARED

public static final int ClassStatus_PREPARED

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Constant Field Values

ClassStatus_INITIALIZED

public static final int ClassStatus_INITIALIZED

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Constant Field Values

ClassStatus_ERROR

public static final int ClassStatus_ERROR

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ClassStatus_VERIFIED_PREPARED_INITIALIZED

public static final int ClassStatus_VERIFIED_PREPARED_INITIALIZED

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TypeTag_CLASS

public static final int TypeTag_CLASS

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TypeTag_INTERFACE

public static final int TypeTag_INTERFACE

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TypeTag_ARRAY

public static final int TypeTag_ARRAY

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Tag_ARRAY

public static final int Tag_ARRAY

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Tag_BYTE

public static final int Tag_BYTE

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Tag_CHAR

public static final int Tag_CHAR

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Tag_OBJECT

public static final int Tag_OBJECT

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Tag_FLOAT

public static final int Tag_FLOAT

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Tag_DOUBLE

public static final int Tag_DOUBLE

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Tag_INT

public static final int Tag_INT

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Tag_LONG

public static final int Tag_LONG

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Tag_SHORT

public static final int Tag_SHORT

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Tag_VOID

public static final int Tag_VOID

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Tag_BOOLEAN

public static final int Tag_BOOLEAN

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Tag_STRING

public static final int Tag_STRING

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Tag_THREAD

public static final int Tag_THREAD

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Tag_THREAD_GROUP

public static final int Tag_THREAD_GROUP

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Tag_CLASS_LOADER

public static final int Tag_CLASS_LOADER

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Tag_CLASS_OBJECT

public static final int Tag_CLASS_OBJECT

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StepDepth_INTO

public static final int StepDepth_INTO

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StepDepth_OVER

public static final int StepDepth_OVER

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StepDepth_OUT

public static final int StepDepth_OUT

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StepSize_MIN

public static final int StepSize_MIN

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StepSize_LINE

public static final int StepSize_LINE

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SuspendPolicy_NONE

public static final int SuspendPolicy_NONE

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SuspendPolicy_EVENT_THREAD

public static final int SuspendPolicy_EVENT_THREAD

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SuspendPolicy_ALL

public static final int SuspendPolicy_ALL

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InvokeOptions_INVOKE_SINGLE_THREADED

public static final int InvokeOptions_INVOKE_SINGLE_THREADED

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InvokeOptions_INVOKE_NONVIRTUAL

public static final int InvokeOptions_INVOKE_NONVIRTUAL

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Constant Field Values

Method Detail

getTypeTag

public static byte getTypeTag(Klass klass)

Gets the JDWP.TypeTag_... value corresponding to a given class.

Parameters:

klass - the class to convert

Returns:

the JDWP.TypeTag_... value corresponding to klass

isValidTypeTag

public static boolean isValidTypeTag(int typeTag)

Return true if the tag is a valid JDWP Type Tag value. Type tags are a sparse set that doesn't include zero, so it's a good value to validate.

Parameters:

typeTag - int

Returns:

boolean

getTag

public static byte getTag(Klass klass)

Given a klass, returns the corresponding com.sun.squawk.debugger.JDWP.Tag value.

Parameters:

klass - Klass

Returns:

the JDWP.Tag value

isValidTag

public static boolean isValidTag(int tag)

Return true if the tag is a valid JDWP Tag value. Tags are a sparse set that doesn't include zero, so it's a good value to validate.

Parameters:

tag - int

Returns:

boolean

isReferenceTag

public static boolean isReferenceTag(int tag)

Return true if the tag represents an reference type JDWP Tag value.

Parameters:

tag - int

Returns:

boolean