Windbg命令学习7(d*s和~s (n m ~f ~u))

以下默认windbg加载calc程序

1.d*s

dds、dps和dqs命令显示给定范围内存的内容,它们是把内存区域转储出来，并把内存中每个元素都视为一个符号对其进行解析，dds是四字节视为一个符号，dqs是每8字节视为一个符号，dps是根据当前处理器架构来选择最合适的长度

比如要看看当前stack 中保存了哪些函数地址，就可以检查ebp  指向的内存

0:000> dds ebp
0007fdfc  0007ff1c
0007fe00  010021b0 calc!WinMain+0x25f
0007fe04  0007fee8
0007fe08  00000000
0007fe0c  00000000
0007fe10  00000000
0007fe14  7c80b741 kernel32!GetModuleHandleA
0007fe18  000a232f
0007fe1c  00000000

由于 COM Interface 和C++ Vtable 里面的成员函数都是顺序排列的，所以这个命令可以方便
地找到虚函数表中具体的函数地址。比如用下面的命令可以找到OpaqueDataInfo 类型中虚
函数对应的实际函数地址:

0:002> x ole32!OpaqueData*
76aa6a41 ole32!OpaqueDataInfo::GetOpaqueData = <no type information>
76aa6b3b ole32!OpaqueDataInfo::UnSerialize = <no type information>
76aa6c16 ole32!OpaqueDataInfo::SerializableQueryInterface = <no type information>
76aa5748 ole32!OpaqueDataInfo::QueryInterface = <no type information>
76aa6393 ole32!OpaqueDataInfo::CopyOpaqueData = <no type information>
76aa5757 ole32!OpaqueDataInfo::AddRef = <no type information>
76a57107 ole32!OpaqueDataInfo::UnSerializeCallBack = <no type information>
76aa5766 ole32!OpaqueDataInfo::Release = <no type information>
769a697c ole32!OpaqueDataInfo::`vftable' = <no type information>
76aa69cb ole32!OpaqueDataInfo::AddOpaqueData = <no type information>
769bfae2 ole32!OpaqueDataInfo::GetOpaqueDataCount = <no type information>
76aa6b24 ole32!OpaqueDataInfo::Serialize = <no type information>
769c9df3 ole32!OpaqueDataInfo::AddRef = <no type information>
769c9ebc ole32!OpaqueDataInfo::Release = <no type information>
76aa6a97 ole32!OpaqueDataInfo::DeleteOpaqueData = <no type information>
76aa6bc9 ole32!OpaqueDataInfo::GetCLSID = <no type information>
76aa57c0 ole32!OpaqueDataInfo::OpaqueDataInfo = <no type information>
769c1cb0 ole32!OpaqueDataInfo::GetAllOpaqueData = <no type information>
76aa54b9 ole32!OpaqueDataInfo::~OpaqueDataInfo = <no type information>
76aa6be9 ole32!OpaqueDataInfo::SetParent = <no type information>
76aa5693 ole32!OpaqueDataInfo::`scalar deleting destructor' = <no type information>
76aa6b78 ole32!OpaqueDataInfo::GetSize = <no type information>
76aa6540 ole32!OpaqueDataInfo::QueryInterface = <no type information>
769a69a0 ole32!OpaqueDataInfo::`vftable' = <no type information>
0:002> dds 769a69a0 
769a69a0  76aa6540 ole32!OpaqueDataInfo::QueryInterface
769a69a4  769c9df3 ole32!InstanceInfo::AddRef
769a69a8  769c9ebc ole32!InstantiationInfo::Release
769a69ac  76aa69cb ole32!OpaqueDataInfo::AddOpaqueData
769a69b0  76aa6a41 ole32!OpaqueDataInfo::GetOpaqueData
769a69b4  76aa6a97 ole32!OpaqueDataInfo::DeleteOpaqueData
769a69b8  769bfae2 ole32!ServerLocationInfo::GetRemoteServerName
769a69bc  769c1cb0 ole32!CComProcessInfo::GetProcessName
769a69c0  76a57107 ole32!InstanceInfo::UnSerializeCallBack
769a69c4  00000021
769a69c8  76a2d73d ole32!CClassMoniker::QueryInterface
769a69cc  76a339fb ole32!CErrorObject::AddRef
769a69d0  76a0679a ole32!CClassMoniker::Release
769a69d4  76a06a39 ole32!CClassMoniker::GetUnmarshalClass
769a69d8  76a06a56 ole32!CClassMoniker::GetMarshalSizeMax
769a69dc  76a06a99 ole32!CClassMoniker::MarshalInterface
769a69e0  76a2d2b9 ole32!CClassMoniker::UnmarshalInterface
769a69e4  76a07099 ole32!CClassMoniker::ReleaseMarshalData
769a69e8  769e288e ole32!CDdeObject::COleItemContainerImpl::IsRunning
769a69ec  76a2d72e ole32!CClassMoniker::QueryInterface
769a69f0  76a339dd ole32!CErrorObject::AddRef
769a69f4  76a06ab8 ole32!CClassMoniker::Release
769a69f8  76a069d1 ole32!CClassMoniker::GetComparisonData
769a69fc  90909090
769a6a00  76a066c9 ole32!CClassMoniker::QueryInterface
769a6a04  76a05efd ole32!CSCMergedEnum<IEnumCATEGORYINFO,tagCATEGORYINFO>::AddRef
769a6a08  76a067a6 ole32!CClassMoniker::Release
769a6a0c  76a068f3 ole32!CClassMoniker::GetClassID
769a6a10  769acee9 ole32!CDdeServerCallMgr::AddRef
769a6a14  76a2d7f2 ole32!CClassMoniker::Load
769a6a18  76a06931 ole32!CClassMoniker::Save
769a6a1c  76a07055 ole32!CClassMoniker::GetSizeMax

 

2.~s

~s命令设置或显示当前线程号

只能在用户模式下指定线程。在内核模式下，波形符(~)用于引用处理器

0:001> ~0s
eax=00000404 ebx=00000000 ecx=00000410 edx=0004c0d0 esi=0012f7f0 edi=00260688
eip=7c92e514 esp=0012f790 ebp=0012f7b0 iopl=0         nv up ei pl zr na pe nc
cs=001b  ss=0023  ds=0023  es=0023  fs=003b  gs=0000             efl=00000246
ntdll!KiFastSystemCallRet:
7c92e514 c3              ret
0:000> k
ChildEBP RetAddr  

我们注意到，调用k时，前缀变成了0:000，这就表明成功切换到0号线程

我们可以通过~thread n来增加线程的挂起计数，相当于调用SuspendThread，而~m对应是减少线程的挂起计数，相当于调用ResumeThread

另可以通过~f来冻结一个线程 ,~u来解冻一个线程，当一个线程处于冻结状态时，恢复目标执行时这个线程不会恢复执行

 

0:000> ~
.  0  Id: 3a18.357c Suspend: 1 Teb: 7ffde000 Unfrozen
   1  Id: 3a18.3bb8 Suspend: 1 Teb: 7ffdd000 Unfrozen
0:000> ~f
0:000> ~
.  0  Id: 3a18.357c Suspend: 1 Teb: 7ffde000 Frozen  
   1  Id: 3a18.3bb8 Suspend: 1 Teb: 7ffdd000 Unfrozen
0:000> g
Breakpoint 1 will not be deferred because of changes in the context. Breakpoint may hit again.
System 0: 1 of 2 threads are frozen