Eclipse發送各種JDWP命令包,DalvikVM收到命令包(command package),響應并發送回復包(reply package),通過緩沖區交換數據

?

JDWP:調試協議

?

(一)Android Dalvik實現的JDWP響應:

static const JdwpHandlerMap gHandlerMap[] = {
??? /* VirtualMachine command set (1) */
??? { 1,??? 1,? handleVM_Version,?????? "VirtualMachine.Version" },
??? { 1,??? 2,? handleVM_ClassesBySignature,
??????????????????????????????????????? "VirtualMachine.ClassesBySignature" },
??? //1,??? 3,? VirtualMachine.AllClasses
??? { 1,??? 4,? handleVM_AllThreads,??? "VirtualMachine.AllThreads" },
??? { 1,??? 5,? handleVM_TopLevelThreadGroups,
??????????????????????????????????????? "VirtualMachine.TopLevelThreadGroups" },
??? { 1,??? 6,? handleVM_Dispose,?????? "VirtualMachine.Dispose" },
??? { 1,??? 7,? handleVM_IDSizes,?????? "VirtualMachine.IDSizes" },
??? { 1,??? 8,? handleVM_Suspend,?????? "VirtualMachine.Suspend" },
??? { 1,??? 9,? handleVM_Resume,??????? "VirtualMachine.Resume" },
??? { 1,??? 10, handleVM_Exit,????????? "VirtualMachine.Exit" },
??? { 1,??? 11, handleVM_CreateString,? "VirtualMachine.CreateString" },
??? { 1,??? 12, handleVM_Capabilities,? "VirtualMachine.Capabilities" },
??? { 1,??? 13, handleVM_ClassPaths,??? "VirtualMachine.ClassPaths" },
??? { 1,??? 14, HandleVM_DisposeObjects, "VirtualMachine.DisposeObjects" },
??? //1,??? 15, HoldEvents
??? //1,??? 16, ReleaseEvents
??? { 1,??? 17, handleVM_CapabilitiesNew,
??????????????????????????????????????? "VirtualMachine.CapabilitiesNew" },
??? //1,??? 18, RedefineClasses
??? //1,??? 19, SetDefaultStratum
??? { 1,??? 20, handleVM_AllClassesWithGeneric,
??????????????????????????????????????? "VirtualMachine.AllClassesWithGeneric"},
??? //1,??? 21, InstanceCounts

??? /* ReferenceType command set (2) */
??? { 2,??? 1,? handleRT_Signature,???? "ReferenceType.Signature" },
??? { 2,??? 2,? handleRT_ClassLoader,?? "ReferenceType.ClassLoader" },
??? { 2,??? 3,? handleRT_Modifiers,???? "ReferenceType.Modifiers" },
??? //2,??? 4,? Fields
??? //2,??? 5,? Methods
??? { 2,??? 6,? handleRT_GetValues,???? "ReferenceType.GetValues" },
??? { 2,??? 7,? handleRT_SourceFile,??? "ReferenceType.SourceFile" },
??? //2,??? 8,? NestedTypes
??? { 2,??? 9,? handleRT_Status,??????? "ReferenceType.Status" },
??? { 2,??? 10, handleRT_Interfaces,??? "ReferenceType.Interfaces" },
??? //2,??? 11, ClassObject
??? { 2,??? 12, handleRT_SourceDebugExtension,
??????????????????????????????????????? "ReferenceType.SourceDebugExtension" },
??? { 2,??? 13, handleRT_SignatureWithGeneric,
??????????????????????????????????????? "ReferenceType.SignatureWithGeneric" },
??? { 2,??? 14, handleRT_FieldsWithGeneric,
??????????????????????????????????????? "ReferenceType.FieldsWithGeneric" },
??? { 2,??? 15, handleRT_MethodsWithGeneric,
??????????????????????????????????????? "ReferenceType.MethodsWithGeneric" },
??? //2,??? 16, Instances
??? //2,??? 17, ClassFileVersion
??? //2,??? 18, ConstantPool

??? /* ClassType command set (3) */
??? { 3,??? 1,? handleCT_Superclass,??? "ClassType.Superclass" },
??? { 3,??? 2,? handleCT_SetValues,???? "ClassType.SetValues" },
??? { 3,??? 3,? handleCT_InvokeMethod,? "ClassType.InvokeMethod" },
??? //3,??? 4,? NewInstance

??? /* ArrayType command set (4) */
??? //4,??? 1,? NewInstance

??? /* InterfaceType command set (5) */

??? /* Method command set (6) */
??? { 6,??? 1,? handleM_LineTable,????? "Method.LineTable" },
??? //6,??? 2,? VariableTable
??? //6,??? 3,? Bytecodes
??? //6,??? 4,? IsObsolete
??? { 6,??? 5,? handleM_VariableTableWithGeneric,
??????????????????????????????????????? "Method.VariableTableWithGeneric" },

??? /* Field command set (8) */

??? /* ObjectReference command set (9) */
??? { 9,??? 1,? handleOR_ReferenceType, "ObjectReference.ReferenceType" },
??? { 9,??? 2,? handleOR_GetValues,???? "ObjectReference.GetValues" },
??? { 9,??? 3,? handleOR_SetValues,???? "ObjectReference.SetValues" },
??? //9,??? 4,? (not defined)
??? //9,??? 5,? MonitorInfo
??? { 9,??? 6,? handleOR_InvokeMethod,? "ObjectReference.InvokeMethod" },
??? { 9,??? 7,? handleOR_DisableCollection,
??????????????????????????????????????? "ObjectReference.DisableCollection" },
??? { 9,??? 8,? handleOR_EnableCollection,
??????????????????????????????????????? "ObjectReference.EnableCollection" },
??? { 9,??? 9,? handleOR_IsCollected,?? "ObjectReference.IsCollected" },
??? //9,??? 10, ReferringObjects

??? /* StringReference command set (10) */
??? { 10,?? 1,? handleSR_Value,???????? "StringReference.Value" },

??? /* ThreadReference command set (11) */
??? { 11,?? 1,? handleTR_Name,????????? "ThreadReference.Name" },
??? { 11,?? 2,? handleTR_Suspend,?????? "ThreadReference.Suspend" },
??? { 11,?? 3,? handleTR_Resume,??????? "ThreadReference.Resume" },
??? { 11,?? 4,? handleTR_Status,??????? "ThreadReference.Status" },
??? { 11,?? 5,? handleTR_ThreadGroup,?? "ThreadReference.ThreadGroup" },
??? { 11,?? 6,? handleTR_Frames,??????? "ThreadReference.Frames" },
??? { 11,?? 7,? handleTR_FrameCount,??? "ThreadReference.FrameCount" },
??? //11,?? 8,? OwnedMonitors
??? { 11,?? 9,? handleTR_CurrentContendedMonitor,
??????????????????????????????????? "ThreadReference.CurrentContendedMonitor" },
??? //11,?? 10, Stop
??? //11,?? 11, Interrupt
??? { 11,?? 12, handleTR_SuspendCount,? "ThreadReference.SuspendCount" },
??? //11,?? 13, OwnedMonitorsStackDepthInfo
??? //11,?? 14, ForceEarlyReturn

??? /* ThreadGroupReference command set (12) */
??? { 12,?? 1,? handleTGR_Name,???????? "ThreadGroupReference.Name" },
??? { 12,?? 2,? handleTGR_Parent,?????? "ThreadGroupReference.Parent" },
??? { 12,?? 3,? handleTGR_Children,???? "ThreadGroupReference.Children" },

??? /* ArrayReference command set (13) */
??? { 13,?? 1,? handleAR_Length,??????? "ArrayReference.Length" },
??? { 13,?? 2,? handleAR_GetValues,???? "ArrayReference.GetValues" },
??? { 13,?? 3,? handleAR_SetValues,???? "ArrayReference.SetValues" },

??? /* ClassLoaderReference command set (14) */
??? { 14,?? 1,? handleCLR_VisibleClasses,
??????????????????????????????????????? "ClassLoaderReference.VisibleClasses" },

??? /* EventRequest command set (15) */
??? { 15,?? 1,? handleER_Set,?????????? "EventRequest.Set" },
??? { 15,?? 2,? handleER_Clear,???????? "EventRequest.Clear" },
??? //15,?? 3,? ClearAllBreakpoints

??? /* StackFrame command set (16) */
??? { 16,?? 1,? handleSF_GetValues,???? "StackFrame.GetValues" },
??? { 16,?? 2,? handleSF_SetValues,???? "StackFrame.SetValues" },
??? { 16,?? 3,? handleSF_ThisObject,??? "StackFrame.ThisObject" },
??? //16,?? 4,? PopFrames

??? /* ClassObjectReference command set (17) */
??? { 17,?? 1,? handleCOR_ReflectedType,"ClassObjectReference.ReflectedType" },

??? /* Event command set (64) */
??? //64,? 100, Composite?? <-- sent from VM to debugger, never received by VM

??? { 199,? 1,? handleDDM_Chunk,??????? "DDM.Chunk" },
};

?

(二)具體的請求和響應:

Eclipse進入debug狀態

(1)發送JDWP的ReferenceType.FieldsWithGeneric命令包, dalvik響應調用handleRT_FieldsWithGeneric->dvmDbgOutputAllFields將某個類的所有域信息放入緩沖,Eclipse讀取以顯示

(2)發送JDWP的ObjectReference.GetValues命令包,dalvik響應調用handleOR_GetValues->dvmDbgGetFieldValue將域值放入緩沖區

總結

以上是生活随笔為你收集整理的Eclipse通过JDWP调试Dalvik的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。