Introduction
In previous post Silverlight Debugging With Visual Studio, I demonstrated that Visual Studio is a powerful and the most convenient tool for debugging managed applications. But for some advanced debugging scenarios, like memory leak, deadlock, runaway process/thread, kernel debugging, and advanced remote/crash/UI debugging etc, WinDbg (or cdb, ntsd, kd) is usually preferred, if not the only option.
Debugging Tools for Windows
Overview
WinDbg is part of the Debugging Tools for Windows package:
Even though WinDbg is a GUI program, it is mostly used as a command line debugger like (and often with) kd, cdb and ntsd, and share the same debug engine and commands. It is super powerful and extensible, particularly well suited for system/low-level debugging like drivers and other operating system components. It does require good knowledge of hardware, operating system, and compiler to get the most out of the toolset. It's a great(or perfect, should I say :-) for native debugging, with its extensive and extensible commands and graphic user interface. Managed debugging support is via SOS debug extension, isn't nearly as good as native debugging, but there is tremendous value in being able to do integrated debugging across managed and native boundary, and for Silverlight, it is the only tool I am aware of that can load SOS and do integrated debugging.
Commands
WinDbg/cdb/ntsd/kd have been around for a long time, so they are very well documented. It's highly recommended that you read about Debugging Tools for Windows on microsoft.com and msdn. Here I only give a brief overview of its commands, to give you a feel and quick reference. All commands come with run time help (via ?|.help|!help [<cmd>] as discussed below), so an overview is usually enough to get your started.
WinDbg has three sets of commands:
Standard Commands
Mainly:
- B* commands to set/clear/list/enable/disable breakpoints on address or access
- D* commands to examine memory(stack/heap, local/global variables and parameters), E* command to modify memory, and S* to search memory
- K* commands to examine call stack
- P, T, G* commands for execution control
below ? command output is an great overview and frequent reference for people using windbg/cdb/ntsd/kd:
0:006> ?
Open debugger.chm for complete debugger documentation
B[C|D|E][<bps>] - clear/disable/enable breakpoint(s)
BL - list breakpoints
BA <access> <size> <addr> - set processor breakpoint
BP <address> - set soft breakpoint
D[type][<range>] - dump memory
DT [-n|y] [[mod!]name] [[-n|y]fields]
[address] [-l list] [-a[]|c|i|o|r[#]|v] - dump using type information
DV [<name>] - dump local variables
E[type] <address> [<values>] - enter memory values
G[H|N] [=<address> [<address>...]] - go
K <count> - stacktrace
KP <count> - stacktrace with source arguments
LM[k|l|u|v] - list modules
LN <expr> - list nearest symbols
P [=<addr>] [<value>] - step over
Q - quit
R [[<reg> [= <expr>]]] - view or set registers
S[<opts>] <range> <values> - search memory
SX [{e|d|i|n} [-c "Cmd1"] [-c2 "Cmd2"] [-h] {Exception|Event|*}] - event filter
T [=<address>] [<expr>] - trace into
U [<range>] - unassemble
version - show debuggee and debugger version
X [<*|module>!]<*|symbol> - view symbols
? <expr> - display expression
?? <expr> - display C++ expression
$< <filename> - take input from a command fileHit Enter...
<expr> unary ops: + - not by wo dwo qwo poi hi low
binary ops: + - * / mod(%) and(&) xor(^) or(|)
comparisons: == (=) < > !=
operands: number in current radix, public symbol, <reg>
<type> : b (byte), w (word), d[s] (doubleword [with symbols]),
a (ascii), c (dword and Char), u (unicode), l (list)
f (float), D (double), s|S (ascii/unicode string)
q (quadword)
<pattern> : [(nt | <dll-name>)!]<var-name> (<var-name> can include ? and *)
<range> : <address> <address>
: <address> L <count>User-mode options:
~ - list threads status
~#s - set default thread
| - list processes status
|#s - set default processx86 options:
DG <selector> - dump selector
<reg> : [e]ax, [e]bx, [e]cx, [e]dx, [e]si, [e]di, [e]bp, [e]sp, [e]ip, [e]fl,
al, ah, bl, bh, cl, ch, dl, dh, cs, ds, es, fs, gs, ss
dr0, dr1, dr2, dr3, dr6, dr7
fpcw, fpsw, fptw, st0-st7, mm0-mm7
xmm0-xmm7
<flag> : iopl, of, df, if, tf, sf, zf, af, pf, cf
<addr> : #<16-bit protect-mode [seg:]address>,
&<V86-mode [seg:]address>Open debugger.chm for complete debugger documentation
Meta Commands
Those start with a dot, mostly for advanced debugging. Some important commands you should know:
- .symfix and .sympath for using symbol server
- .srcfix and .srcpath for using source server
- .load, .loadby, .unload, .chain, .setdll for managing debug extensions
- .server, .remote for remote debugging
It is well worth your time to get familiar with symbol server, source server and remote debugging: they will make your life a lot more easier. below is the output of .help command:
0:006> .help
. commands:
.abandon - abandon the current process
.allow_exec_cmds [0|1] - control execution commands
.allow_image_mapping [0|1] - control on-demand image file mapping
.apply_dbp [<options>] - add current data breakpoint state to a
register context
.asm [<options>] - set disassembly options
.asm- [<options>] - clear disassembly options
.attach <proc> - attach to <proc> at next execution
.block { <commands> } - brackets a set of commands for nested execution
.bpsync [0|1] - special breakpoint behavior for multithreaded debuggees
.break - break out of the enclosing loop
.breakin - break into KD
.cache [<options>] - virtual memory cache control
.call <fn>(<arg1>, <arg2>, ...) - run a function in the debuggee
.catch { <commands> } - catch failures in commands
.chain - list current extensions
.childdbg <0|1> - turn child process debugging on or off
.clients - list currently active clients
.closehandle [<options>] [<handle>] - close the given handle
.continue - continue the enclosing loop
.copysym [<options>] <path> - copy current symbol files to a directory
.create <command line> - create a new process
.createdir [<options>] [<path>] - control process creation options
.cxr <address> - dump context record at specified address
k* after this gives cxr stack
.dbgdbg - attach a debugger to the current debugger
.debug_sw_wow [0|1] - allow interaction with software WOW emulation
.detach - detach from the current process/dump
.dml_file <file> - output DML content from file
.dml_flow <start> <addr> - show basic block code flow
.dml_start [<options>] - navigable overview of debugger activities
.do { <commands> } (<cond>) - execute <commands> until <cond> is zero
.drivers - This command was removed -- use 'lm' or .reload -l)
.dump [<options>] <filename> - create a dump file on the host system
.dvalloc [<options>] <bytes> - VirtualAlloc memory in the debuggee
.dvfree [<options>] <offset> <bytes> - VirtualFree memory in the debuggee
.echo ["<string>"|<string>] - echo string
.echotime - output debugger time
.echotimestamps [0|1] - toggle timestamp output on events
.ecxr - dump context record for current exception
.effmach [<machine>] - change current machine type
.else { <commands> } - if/then/else conditional execution
.elsif (<cond>) { <commands> } [<else clauses>] - if/then/else conditional
execution
.enable_long_status [0|1] - dump LONG types in default base
.enable_unicode [0|1] - dump USHORT array/pointers and unicode strings
.endsrv <id> - disable the given engine server
.endpsrv - cause the current session's remote server to exit
.enumtag - enumerate available tagged data
.event_code - display cached event instructions
.eventlog - display log of recent events
.events - display and select available events
.eventstr - display any event strings registered by debuggee
.exepath [<dir>[;...]] - set executable search path
.exepath+ [<dir>[;...]] - append executable search path
.expr - control expression evaluator
.exptr <address> - do .exr and .cxr for EXCEPTION_POINTERS
.exr <address> - dump exception record at specified address
.extmatch [<opts>] <pattern> - display all extensions matching pattern
.extpath <opts> [<dir>[;...]] - set extension search path
.extpath+ <opts> [<dir>[;...]] - append extension search path
.f+ - set current stack frame to caller of current frame
.f- - set current stack frame to callee of current frame
.fiber <address> - sets context of fiber at address
resets context if no address specified
.fiximports <pattern> - attempts to link imports for images
.fnent <address> - dump function entry for the given code address
.fnret <fnaddr> [<retval>] - display formatted return value
.for ( <init> ; <cond> ; <step> ) { <commands> } - execute <commands> and
<step> until <cond> is
zero
.force_radix_output [0|1] - dump integer types in default base
.force_system_init [<options>] - force pending systems to initialize if possible
.force_tb - forcibly allow branch tracing
.foreach [opts] ( <alias> { <tcmds> } ) { <ecmds> } - execute <ecmds> for
each token in the
output of <tcmds>
.fpo <options> - control override FPO information
.frame [<frame>] - set current stack frame for locals
.formats <expr> - displays expression result in many formats
.help [<options>] - display this help
.holdmem <options> [range] - hold and compare memory data
.if (<cond>) { <commands> } [<else clauses>] - if/then/else conditional
execution
.ignore_missing_pages [0|1] - control kernel summary dump missing
page error message
.imgscan <options> - scan memory for PE images
.jdinfo <jdi_addr> - interpret AeDebug information
.kframes <count> - set default stack trace depth
.kill - kill the current process
.lastevent - display the last event that occurred
.leave - exit the enclosing .catch
.lines - toggle line symbol loading
.load <name> - add this extension DLL to the extension chain
.loadby <name> <mod> - add the extension DLL in the module
directory to the extension chain
.locale [<locale>] - set the current locale
.logfile - display log status
.logopen [<file>] - open new log file
.logappend [<file>] - append to log file
.logclose - close log file
.netsyms [0|1] - allow/disallow net symbol paths
.netuse [<options>] - manage net connections
.noshell - disable shell commands
.noversion - disable extension version checking
.ofilter <pattern> - filter debuggee output against the given pattern
.ocommand <prefix> - treat output with the given prefix as a command
.opendump <file> - open a dump file
.outmask <mask> - set bits in the current output mask
.outmask- <mask> - clear bits in the current output mask
.pcmd [<options>] - control per-prompt command
.pop [<options>] - pop state
.prefer_dml [0|1] - control DML mode default
.printf "<format>", <args...> - formatted output
.process [<address>] - sets implicit process
resets default if no address specified
.prompt_allow [<options>] - control what information can be displayed
at the prompt
.push [<options>] - push state
.quit_lock [<options>] - locks session against unexpected quit
.readmem <file> <range> - read raw memory from a file
.record_branches [0|1] - controls recording of processor branching
.reload [<image.ext>[=<address>,<size>]] - reload symbols
.restart - request a session restart
.remote <pipename> - start remote.exe server
.secure [0|1] - disallow operations dangerous for the host
.send_file <options> - send files to remote server
.server <options> - start engine server
.servers - list active remoting servers
.setdll <name> - debugger will search for extensions in this DLL first
.shell [<command>] - execute shell command
.show_read_failures [<opts>] - control extra read failure output
.show_sym_failures [<opts>] - control extra symbol failure output
.sleep <milliseconds> - debugger sleeps for given duration
useful for allowing access to a machine that's
broken in on an ntsd -d
.srcfix [<path extra>] - fix source search path
.srcfix+ [<path extra>] - append fixed source search path
.srcnoisy [0|1] - control verbose source loading output
.srcpath [<dir>[;...]] - set source search path
.srcpath+ [<dir>[;...]] - append source search path
.step_filter [<opts>] ["<pattern>[;<pattern>...]"] - Set symbol patterns
to skip when stepping
.symfix [<localsym>] - fix symbol search path
.symfix+ [<localsym>] - append fixed symbol search path
.symopt <flags> - set symbol options
.symopt+ <flags> - set symbol options
.symopt- <flags> - clear symbol options
.sympath [<dir>[;...]] - set symbol search path
.sympath+ [<dir>[;...]] - append symbol search path
.thread [<address>] - sets context of thread at address
resets default context if no address specified
.time - displays session time information
.ttime - displays thread time information
.tlist - list running processes
.typeopt <flags> - set/clear type options
.unload <name> - remove this extension DLL from the list of extension DLLs
.unloadall - remove all extension DLLs from the list of extensions DLLs
.wake - wake up a .sleep'ing debugger
.while (<cond>) { <commands> } - execute <commands> while <cond> is non-zero
.writemem <file> <range> - write raw memory to a fileUse ".hh <command>" or open debugger.chm in the debuggers directory to get
detailed documentation on a command.
Extension Commands
Those start with !, usually for a particular area, like SOS extension commands for managed debugging. You can use !<ext>.help to list commands of an extension, like !exts.help. For advanced system debugging, like detecting memory leak, deadlock etc, you have to be very familiar with those extension commands.
SOS
Overview
SOS is the acronym for Son of Strike (don't ask me why), a debug extension for managed debugging. I believe it was invented by CLR team for CLR debugging, so it has been around for a long time, and there are lots of good information on the web. Some recommended readings:
- SOS Debug Extension on MSDN
- Jason Zander's blog post: SOS Debugging of CLR
Each version of CLR has its own SOS (.NET Framework 3.5 still uses CLR 2.0, and Silverlight has its own CLR):
Directory of C:\Program Files\Debugging Tools for Windows\clr10
09/19/2007 07:01 PM 948,784 sos.dll
1 File(s) 948,784 bytesDirectory of C:\Program Files\Microsoft Silverlight\2.0.31005.0
10/05/2008 02:16 AM 495,424 sos.dll
1 File(s) 495,424 bytesDirectory of C:\Windows\Microsoft.NET\Framework\v1.1.4322
07/15/2004 12:35 AM 319,488 SOS.dll
1 File(s) 319,488 bytesDirectory of C:\Windows\Microsoft.NET\Framework\v2.0.50727
07/27/2008 10:03 AM 392,184 SOS.dll
1 File(s) 392,184 bytes
Commands
SOS run time help is so great that you almost don't need any other doc other than a few try and error and some frustration :-)
0:016> !help
-------------------------------------------------------------------------------
SOS is a debugger extension DLL designed to aid in the debugging of managed
programs. Functions are listed by category, then roughly in order of
importance. Shortcut names for popular functions are listed in parenthesis.
Type "!help <functionname>" for detailed info on that function.Object Inspection Examining code and stacks
----------------------------- -----------------------------
DumpObj (do) Threads
DumpArray (da) CLRStack
DumpStackObjects (dso) IP2MD
DumpHeap U
DumpVC DumpStack
GCRoot EEStack
ObjSize GCInfo
FinalizeQueue EHInfo
PrintException (pe) COMState
TraverseHeap BPMDExamining CLR data structures Diagnostic Utilities
----------------------------- -----------------------------
DumpDomain VerifyHeap
EEHeap VerifyObj
Name2EE FindRoots
SyncBlk HeapStat
DumpMT GCWhere
DumpClass ListNearObj (lno)
DumpMD GCHandles
Token2EE GCHandleLeaks
EEVersion FinalizeQueue (fq)
DumpModule FindAppDomain
ThreadPool SaveModule
DumpAssembly ProcInfo
DumpSigElem StopOnException (soe)
DumpRuntimeTypes DumpLog
DumpSig VMMap
RCWCleanupList VMStat
DumpIL MinidumpMode
AnalyzeOOM (ao)Examining the GC history Other
----------------------------- -----------------------------
HistInit FAQ
HistStats
HistRoot
HistObj
HistObjFind
HistClear
Sample Debug Demonstration
I will use the same simplest Silverlight application in previous post (Silverlight Debugging With Visual Studio) to demonstrate WinDbg debugging with SOS:
Here is the debug log with my annotations (start with //):
// set up symbol path to use symbol server
0:013> .sympath
Symbol search path is: <empty>
0:013> .symfix C:\Users\ningz\AppData\Local\Temp\Symbols
0:013> .sympath
Symbol search path is: SRV*C:\Users\ningz\AppData\Local\Temp\Symbols*\\symbols\symbols// add pdb path for the application being debugged
0:013> .sympath+"C:\Users\ningz\Documents\Visual Studio 2008\Projects\SilverlightApplication1\SilverlightApplication1\Bin\Debug"
Symbol search path is: SRV*C:\Users\ningz\AppData\Local\Temp\Symbols*http://msdl.microsoft.com/download/symbols;C:\Users\ningz\Documents\Visual Studio 2008\Projects\SilverlightApplication1\SilverlightApplication1\Bin\Debug// reload all symbols
0:013> .reload
Reloading current modules
..................................................................................................................
// set up source path to use source server
0:013> .srcpath
Source search path is: <empty>
0:013> .srcfix
Source search path is: SRV*
0:013> .srcpath+"C:\Users\ningz\Documents\Visual Studio 2008\Projects\SilverlightApplication1\SilverlightApplication1"
Source search path is: SRV*;C:\Users\ningz\Documents\Visual Studio 2008\Projects\SilverlightApplication1\SilverlightApplication1
// load SOS. Please note:
// 1. it seems mscorwks is replaced with coreclr in Silverlight
// 2. instead of .loadby, you can also use .load "C:\Program Files\Microsoft Silverlight\2.0.31005.0\sos.dll"
0:013> .loadby sos coreclr
Loaded c:\Program Files\Microsoft Silverlight\2.0.31005.0\sos extension DLL
//set a breakpoint for button click event handler
0:013> !bpmd SilverlightApplication1 SilverlightApplication1.Page.Button_Click
Found 1 methods...
MethodDesc = 03983a30
Adding pending breakpoints...
0:013> bl
0 e 0428215b 0001 (0001) 0:****
0:013> g
ModLoad: 70800000 7080c000 C:\Windows\system32\dwmapi.dll
// click the button and break into windbg
Breakpoint 0 hit
*** WARNING: Unable to verify checksum for SilverlightApplication1.dll
SilverlightApplication1!Button_Click:
04850398 55 push ebp
Integrated managed debugging does not support enumeration of local variables.
See http://dbg/managed.htm for more details.
Managed frame processing failed, HRESULT 0x80004005
// compare !threads and ~* output
0:005> !threads // list managed threads only
ThreadCount: 3
UnstartedThread: 0
BackgroundThread: 3
PendingThread: 0
DeadThread: 0
Hosted Runtime: yes
PreEmptive GC Alloc Lock
ID OSID ThreadOBJ State GC Context Domain Count APT Exception
5 1 1b08 043576e0 220 Disabled 04f9f214:04f9ffe8 06f529d8 0 STA
9 2 928 043689c8 b220 Enabled 00000000:00000000 0433c738 0 MTA (Finalizer)
10 3 1e8c 06f509d0 1220 Enabled 00000000:00000000 0433c738 0 Ukn
0:005> ~* // list all threads
0 Id: 162c.1a28 Suspend: 1 Teb: 7ffde000 Unfrozen
Start: iexplore!wWinMainCRTStartup (00a52d79)
Priority: 0 Priority class: 32 Affinity: 3
2 Id: 162c.1020 Suspend: 1 Teb: 7ffdc000 Unfrozen
Start: ole32!CRpcThreadCache::RpcWorkerThreadEntry (76dfe0cc)
Priority: 0 Priority class: 32 Affinity: 3
3 Id: 162c.1e00 Suspend: 1 Teb: 7ffda000 Unfrozen
Start: ntdll!TppWaiterpThread (778ab61b)
Priority: 0 Priority class: 32 Affinity: 3
4 Id: 162c.1f00 Suspend: 1 Teb: 7ffd9000 Unfrozen
Start: msvcrt!_endthreadex+0x6f (76162da8)
Priority: 0 Priority class: 32 Affinity: 3
. 5 Id: 162c.1b08 Suspend: 1 Teb: 7ffd8000 Unfrozen
Start: IEFRAME!CTabWindow::_TabWindowThreadProc (6c163fdb)
Priority: 0 Priority class: 32 Affinity: 3
7 Id: 162c.170 Suspend: 1 Teb: 7ffd6000 Unfrozen
Start: npctrl!CXcpDispatcher::DispatcherTimerCallback (6a6d16f4)
Priority: 0 Priority class: 32 Affinity: 3
8 Id: 162c.1cd0 Suspend: 1 Teb: 7ffd5000 Unfrozen
Start: coreclr!DebuggerRCThread::ThreadProcStatic (640eb5cd)
Priority: 0 Priority class: 32 Affinity: 3
9 Id: 162c.928 Suspend: 1 Teb: 7ffd4000 Unfrozen
Start: coreclr!Thread::intermediateThreadProc (63fb8e4f)
Priority: 0 Priority class: 32 Affinity: 3
10 Id: 162c.1e8c Suspend: 1 Teb: 7ffd3000 Unfrozen
Start: coreclr!Thread::intermediateThreadProc (63fb8e4f)
Priority: 0 Priority class: 32 Affinity: 3
11 Id: 162c.1fac Suspend: 1 Teb: 7ffaf000 Unfrozen
Start: agcore!CMulticoreTaskScheduler::WorkerThread (660547de)
Priority: 0 Priority class: 32 Affinity: 3
12 Id: 162c.1b78 Suspend: 1 Teb: 7ffae000 Unfrozen
Start: agcore!CMulticoreTaskScheduler::WorkerThread (660547de)
Priority: 0 Priority class: 32 Affinity: 3
13 Id: 162c.1d18 Suspend: 1 Teb: 7ffdb000 Unfrozen
Start: ntdll!RtlUserThreadStart (778c9a78)
Priority: 0 Priority class: 32 Affinity: 3
Managed frame processing failed, HRESULT 0x80004005
Integrated managed debugging does not support enumeration of local variables.
See http://dbg/managed.htm for more details.
// compare !clrstack & k output
0:005> !clrstack -p // list managed stack frames only
OS Thread Id: 0x1b08 (5)
ESP EIP
0450f850 04800398 SilverlightApplication1.Page.Button_Click(System.Object, System.Windows.RoutedEventArgs)
PARAMETERS:
this (<CLR reg>) = 0x04f59c78
sender (<CLR reg>) = 0x04f5b948
e (0x0450f854) = 0x04f9f1f00450f858 048cde0d System.Windows.Controls.Primitives.ButtonBase.OnClick()
PARAMETERS:
this (0x0450f864) = 0x04f5b9480450f870 048cdd10 System.Windows.Controls.Button.OnClick()
PARAMETERS:
this = <no data>0450f880 048cdc3d System.Windows.Controls.Primitives.ButtonBase.OnMouseLeftButtonUp(System.Windows.Input.MouseButtonEventArgs)
PARAMETERS:
this (0x0450f884) = 0x04f5b948
e (0x0450f880) = 0x04f9f1880450f890 048cdba1 System.Windows.Controls.Control.OnMouseLeftButtonUp(System.Windows.Controls.Control, System.EventArgs)
PARAMETERS:
ctrl = <no data>
e = <no data>0450f8a0 0483a0e7 MS.Internal.JoltHelper.FireEvent(IntPtr, IntPtr, Int32, System.String)
PARAMETERS:
unmanagedObj (0x0450f8f8) = 0x04355c48
unmanagedObjArgs (0x0450f8f4) = 0x0707be00
argsTypeIndex (0x0450f928) = 0x000000a9
eventName (0x0450f924) = 0x04f9f16c0450fa74 63ef17b0 [GCFrame: 0450fa74]
0450fb30 63ef17b0 [ContextTransitionFrame: 0450fb30]
0450fc28 63ef17b0 [UMThkCallFrame: 0450fc28]
0:005> kP // list all stack frames
ChildEBP RetAddr
0450f868 048cde0d SilverlightApplication1!Button_Click(<HRESULT 0x80004001>)
0450f868 048cdd10 System_Windows!System.Windows.Controls.Primitives.ButtonBase.OnClick(<HRESULT 0x80004001>)+0x5d
0450f878 048cdc3d System_Windows!System.Windows.Controls.Button.OnClick(<HRESULT 0x80004001>)+0x48
0450f888 048cdba1 System_Windows!System.Windows.Controls.Primitives.ButtonBase.OnMouseLeftButtonUp(<HRESULT 0x80004001>)+0x85
0450f898 0483a0e7 System_Windows!System.Windows.Controls.Control.OnMouseLeftButtonUp(<HRESULT 0x80004001>)+0x41
0450f91c 63ef17b0 System_Windows!MS.Internal.JoltHelper.FireEvent(<HRESULT 0x80004001>)+0x1b7
0450f934 63ef5f98 coreclr!CallDescrWorker+0x33
0450f9b0 63f032bc coreclr!CallDescrWorkerWithHandler+0x8e
0450f9d0 63f0345c coreclr!ForwardCallToManagedMethod+0x55
0450faf4 63fc4abf coreclr!DoUMThunkCallWorker+0x199
0450fbe0 04c513d2 coreclr!DoUMThunkCall+0x1b4
WARNING: Frame IP not in any known module. Following frames may be wrong.
0450fc10 6607e0db 0x4c513d2
0450fc70 6a6dc1fc agcore!CCoreServices::CLR_FireEvent+0x183
Managed frame processing failed, HRESULT 0x80004005
0450fc84 6a6dc187 npctrl!CommonBrowserHost::CLR_FireEvent+0x2a
0450fcc8 6a6dc048 npctrl!CControlBase::ScriptCallback+0x366
0450fd08 6a6dc013 npctrl!CXcpDispatcher::OnScriptCallback+0xee
0450fd14 6a6dbfef npctrl!CXcpDispatcher::OnWindowMessage+0x3a
0450fd2c 7731f8d2 npctrl!CXcpDispatcher::WindowProc+0x7f
0450fd58 7731f794 USER32!InternalCallWinProc+0x23
0450fdd0 77320008 USER32!UserCallWinProcCheckWow+0x14b
// examine heap, note the convenience of strong typed object heap,
// instead of un-typed bytes as in native heap
0:005> !dumpheap -type SilverlightApplication1
Address MT Size
04f4f31c 046336b0 36
04f59c78 04633a6c 68
total 2 objects
Statistics:
MT Count TotalSize Class Name
046336b0 1 36 SilverlightApplication1.App
04633a6c 1 68 SilverlightApplication1.Page
Total 2 objects
0:005> !do 04f59c78
Name: SilverlightApplication1.Page
MethodTable: 04633a6c
EEClass: 0463196c
Size: 68(0x44) bytes
File: SilverlightApplication1, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null
Fields:
MT Field Offset Type VT Attr Value Name
047d97a0 40000dc 4 ...al.NativeResource 0 instance 04f5a5c0 m_nativePtr
04853ab8 40000df 8 ... System.Windows]] 0 instance 00000000 _valueTable
047d9874 40000e0 c ...reTypeEventHelper 0 instance 04f5a600 _coreTypeEventHelper
04856388 40000e3 10 ...bject, mscorlib]] 0 instance 04f79a58 _treeChildren
047ae03c 40000e4 14 ...rnal.IManagedPeer 0 instance 00000000 _treeParent
03d50a90 40000dd 2b0 System.IntPtr 1 shared static StaticNativePointer
>> Domain:Value 0433c738:NotInit 06f529d8:00000000 <<
03d50f28 40000de 2b4 System.Boolean 1 shared static _isCoreCreate
>> Domain:Value 0433c738:NotInit 06f529d8:0 <<
047ae384 40000e1 8 ....DependencyObject 0 shared static PropertyReferencesHolder
>> Domain:Value 0433c738:NotInit 06f529d8:04f489b8 <<
04661618 40000e2 c ...flection.Assembly 0 shared static _executingAssembly
>> Domain:Value 0433c738:NotInit 06f529d8:00000000 <<
047d0b90 40000f1 18 ...rs.AutomationPeer 0 instance 00000000 m_pAP
047d7404 40000e8 10 ...ependencyProperty 0 shared static OpacityProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a4a8 <<
047d7404 40000e9 14 ...ependencyProperty 0 shared static ClipProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a4d0 <<
047d7404 40000ea 18 ...ependencyProperty 0 shared static RenderTransformProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a4f8 <<
047d7404 40000eb 1c ...ependencyProperty 0 shared static OpacityMaskProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a50c <<
047d7404 40000ec 20 ...ependencyProperty 0 shared static RenderTransformOriginProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a534 <<
047d7404 40000ed 24 ...ependencyProperty 0 shared static IsHitTestVisibleProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a548 <<
047d7404 40000ee 28 ...ependencyProperty 0 shared static VisibilityProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a570 <<
047d7404 40000ef 2c ...ependencyProperty 0 shared static RenderSizeProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a598 <<
047d7404 40000f0 30 ...ependencyProperty 0 shared static UseLayoutRoundingProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a5ac <<
00000000 4000108 1c 0 instance 00000000 BindingValidationError
04856ae4 400010a 20 ...angedEventHandler 0 instance 00000000 DPChanged
048bc8a4 400010b 24 ...angedEventHandler 0 instance 00000000 DataContextChanged
03d50f28 400010c 2c System.Boolean 1 instance 0 _isDataContextBound
0481f43c 400010d 28 ...angedEventHandler 0 instance 00000000 _sizeChanged
047d7404 40000f2 34 ...ependencyProperty 0 shared static TriggersProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a144 <<
047d7404 40000f3 38 ...ependencyProperty 0 shared static ResourcesProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a158 <<
047d7404 40000f4 3c ...ependencyProperty 0 shared static LanguageProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a180 <<
047d7404 40000f5 40 ...ependencyProperty 0 shared static ActualWidthProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a194 <<
047d7404 40000f6 44 ...ependencyProperty 0 shared static ActualHeightProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a1a8 <<
047d7404 40000f7 48 ...ependencyProperty 0 shared static WidthProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a1bc <<
047d7404 40000f8 4c ...ependencyProperty 0 shared static HeightProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a1d0 <<
047d7404 40000f9 50 ...ependencyProperty 0 shared static MinWidthProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a1e4 <<
047d7404 40000fa 54 ...ependencyProperty 0 shared static MaxWidthProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a1f8 <<
047d7404 40000fb 58 ...ependencyProperty 0 shared static MinHeightProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a20c <<
047d7404 40000fc 5c ...ependencyProperty 0 shared static MaxHeightProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a220 <<
047d7404 40000fd 60 ...ependencyProperty 0 shared static HorizontalAlignmentProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a234 <<
047d7404 40000fe 64 ...ependencyProperty 0 shared static VerticalAlignmentProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a248 <<
047d7404 40000ff 68 ...ependencyProperty 0 shared static MarginProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a25c <<
047d7404 4000100 6c ...ependencyProperty 0 shared static StyleProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a284 <<
047d7404 4000101 70 ...ependencyProperty 0 shared static ParentProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a2ac <<
047d7404 4000102 74 ...ependencyProperty 0 shared static NameProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a2c0 <<
047d7404 4000103 78 ...ependencyProperty 0 shared static TagProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a2d4 <<
047d7404 4000104 7c ...ependencyProperty 0 shared static TagInternalProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a2fc <<
04851464 4000105 80 ...ndows.RoutedEvent 0 shared static LoadedEvent
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a420 <<
047d7404 4000106 84 ...ependencyProperty 0 shared static CursorProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a440 <<
047d7404 4000107 88 ...ependencyProperty 0 shared static InstanceDelegateStoreProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a468 <<
047d7404 4000109 8c ...ependencyProperty 0 shared static DataContextProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a494 <<
047a1e2c 400010e 90 ...rence, mscorlib]] 0 shared static _staticDelegateList
>> Domain:Value 0433c738:NotInit 06f529d8:00000000 <<
00000000 4000264 30 ...angedEventHandler 0 instance 00000000 IsEnabledChanged
047d7404 4000252 430 ...ependencyProperty 0 shared static IsTabStopProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f59ce4 <<
047d7404 4000253 434 ...ependencyProperty 0 shared static TabIndexProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f59cf8 <<
047d7404 4000254 438 ...ependencyProperty 0 shared static TemplateProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f59d20 <<
047d7404 4000255 43c ...ependencyProperty 0 shared static TabNavigationProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f59d48 <<
047d7404 4000256 440 ...ependencyProperty 0 shared static PaddingProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f59d70 <<
047d7404 4000257 444 ...ependencyProperty 0 shared static HorizontalContentAlignmentProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f59d98 <<
047d7404 4000258 448 ...ependencyProperty 0 shared static VerticalContentAlignmentProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f59dc0 <<
047d7404 4000259 44c ...ependencyProperty 0 shared static BackgroundProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f59de8 <<
047d7404 400025a 450 ...ependencyProperty 0 shared static BorderBrushProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f59dfc <<
047d7404 400025b 454 ...ependencyProperty 0 shared static BorderThicknessProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f59e10 <<
047d7404 400025c 458 ...ependencyProperty 0 shared static FontSizeProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f59e24 <<
047d7404 400025d 45c ...ependencyProperty 0 shared static FontFamilyProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f59e4c <<
047d7404 400025e 460 ...ependencyProperty 0 shared static ForegroundProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f59e60 <<
047d7404 400025f 464 ...ependencyProperty 0 shared static FontWeightProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f59e88 <<
047d7404 4000260 468 ...ependencyProperty 0 shared static FontStyleProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f59eb0 <<
047d7404 4000261 46c ...ependencyProperty 0 shared static FontStretchProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f59ed8 <<
047d7404 4000262 470 ...ependencyProperty 0 shared static DefaultStyleKeyProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f59eec <<
047d7404 4000263 474 ...ependencyProperty 0 shared static IsEnabledProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f59f00 <<
04857f14 4000265 478 ... System.Windows]] 0 shared static _resourceDictionaryCache
>> Domain:Value 0433c738:NotInit 06f529d8:04f5cae4 <<
03cf5668 4000266 47c System.Object[] 0 shared static _controlDelgates
>> Domain:Value 0433c738:NotInit 06f529d8:04f59f14 <<
047d7404 4000501 77c ...ependencyProperty 0 shared static ContentProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f59cd0 <<
04852580 4000002 34 ...ows.Controls.Grid 0 instance 04f79770 LayoutRoot
04852a10 4000003 38 ...s.Controls.Button 0 instance 04f5b948 button
03d50f28 4000004 3c System.Boolean 1 instance 1 _contentLoaded
// two lines above is the button object of the page object
// remember its address 04f5b948, since we will refer to it later
// we can get the same address for the button object via dumpheap command:
0:005> !dumpheap -mt 04852a10
Address MT Size
04f5b948 04852a10 92
total 1 objects
Statistics:
MT Count TotalSize Class Name
04852a10 1 92 System.Windows.Controls.Button
Total 1 objects
0:005> !gcwhere 04f5b948 // button is in gen0, since there is no GC yet
Address Gen Heap segment begin allocated size
04f5b948 0 0 04f40000 04f41000 04f9fff4 0x5c(92)
0:005> !gcroot 04f5b948 // see who's holding reference to the button object
Note: Roots found on stacks may be false positives. Run "!help gcroot" for
more info.
// registry references
ecx:Root: 04f59c78(SilverlightApplication1.Page)->
04f5b948(System.Windows.Controls.Button)->
edx:Root: 04f5b948(System.Windows.Controls.Button)->
// stack references
Scan Thread 5 OSTHread 1b08
ESP:450f860:Root: 04f5ca18(System.Windows.RoutedEventHandler)->
04f59c78(SilverlightApplication1.Page)->
04f5b948(System.Windows.Controls.Button)->
ESP:450f864:Root: 04f5b948(System.Windows.Controls.Button)->
ESP:450f874:Root: 04f5b948(System.Windows.Controls.Button)->
ESP:450f884:Root: 04f5b948(System.Windows.Controls.Button)->
ESP:450f894:Root: 04f5b948(System.Windows.Controls.Button)->
ESP:450f8d4:Root: 04f5b948(System.Windows.Controls.Button)->
ESP:450f8e4:Root: 04f5b948(System.Windows.Controls.Button)->
Scan Thread 9 OSTHread 928
Scan Thread 10 OSTHread 1e8c
// domain references
DOMAIN(06F529D8):HANDLE(Pinned):46412f8:Root: 05f44260(System.Object[])->
04f45234(System.Collections.Generic.List`1[[System.Object, mscorlib]])->
04f59980(System.Object[])->
04f59c78(SilverlightApplication1.Page)->
04f5b948(System.Windows.Controls.Button)->
Managed frame processing failed, HRESULT 0x80004005
Integrated managed debugging does not support enumeration of local variables.
See http://dbg/managed.htm for more details.
// examine the button object itself
0:005> !do 04f5b948
Name: System.Windows.Controls.Button
MethodTable: 04852a10
EEClass: 0482e5f0
Size: 92(0x5c) bytes
File: c:\Program Files\Microsoft Silverlight\2.0.31005.0\System.Windows.dll
Fields:
MT Field Offset Type VT Attr Value Name
047d97a0 40000dc 4 ...al.NativeResource 0 instance 04f5bd58 m_nativePtr
04853ab8 40000df 8 ... System.Windows]] 0 instance 04f5c0bc _valueTable
047d9874 40000e0 c ...reTypeEventHelper 0 instance 04f5bd88 _coreTypeEventHelper
04856388 40000e3 10 ...bject, mscorlib]] 0 instance 04f5bee8 _treeChildren
047ae03c 40000e4 14 ...rnal.IManagedPeer 0 instance 04f79770 _treeParent
03d50a90 40000dd 2b0 System.IntPtr 1 shared static StaticNativePointer
>> Domain:Value 0433c738:NotInit 06f529d8:00000000 <<
03d50f28 40000de 2b4 System.Boolean 1 shared static _isCoreCreate
>> Domain:Value 0433c738:NotInit 06f529d8:0 <<
047ae384 40000e1 8 ....DependencyObject 0 shared static PropertyReferencesHolder
>> Domain:Value 0433c738:NotInit 06f529d8:04f489b8 <<
04661618 40000e2 c ...flection.Assembly 0 shared static _executingAssembly
>> Domain:Value 0433c738:NotInit 06f529d8:00000000 <<
047d0b90 40000f1 18 ...rs.AutomationPeer 0 instance 00000000 m_pAP
047d7404 40000e8 10 ...ependencyProperty 0 shared static OpacityProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a4a8 <<
047d7404 40000e9 14 ...ependencyProperty 0 shared static ClipProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a4d0 <<
047d7404 40000ea 18 ...ependencyProperty 0 shared static RenderTransformProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a4f8 <<
047d7404 40000eb 1c ...ependencyProperty 0 shared static OpacityMaskProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a50c <<
047d7404 40000ec 20 ...ependencyProperty 0 shared static RenderTransformOriginProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a534 <<
047d7404 40000ed 24 ...ependencyProperty 0 shared static IsHitTestVisibleProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a548 <<
047d7404 40000ee 28 ...ependencyProperty 0 shared static VisibilityProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a570 <<
047d7404 40000ef 2c ...ependencyProperty 0 shared static RenderSizeProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a598 <<
047d7404 40000f0 30 ...ependencyProperty 0 shared static UseLayoutRoundingProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a5ac <<
00000000 4000108 1c 0 instance 00000000 BindingValidationError
04856ae4 400010a 20 ...angedEventHandler 0 instance 00000000 DPChanged
048bc8a4 400010b 24 ...angedEventHandler 0 instance 00000000 DataContextChanged
03d50f28 400010c 2c System.Boolean 1 instance 0 _isDataContextBound
0481f43c 400010d 28 ...angedEventHandler 0 instance 00000000 _sizeChanged
047d7404 40000f2 34 ...ependencyProperty 0 shared static TriggersProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a144 <<
047d7404 40000f3 38 ...ependencyProperty 0 shared static ResourcesProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a158 <<
047d7404 40000f4 3c ...ependencyProperty 0 shared static LanguageProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a180 <<
047d7404 40000f5 40 ...ependencyProperty 0 shared static ActualWidthProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a194 <<
047d7404 40000f6 44 ...ependencyProperty 0 shared static ActualHeightProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a1a8 <<
047d7404 40000f7 48 ...ependencyProperty 0 shared static WidthProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a1bc <<
047d7404 40000f8 4c ...ependencyProperty 0 shared static HeightProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a1d0 <<
047d7404 40000f9 50 ...ependencyProperty 0 shared static MinWidthProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a1e4 <<
047d7404 40000fa 54 ...ependencyProperty 0 shared static MaxWidthProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a1f8 <<
047d7404 40000fb 58 ...ependencyProperty 0 shared static MinHeightProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a20c <<
047d7404 40000fc 5c ...ependencyProperty 0 shared static MaxHeightProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a220 <<
047d7404 40000fd 60 ...ependencyProperty 0 shared static HorizontalAlignmentProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a234 <<
047d7404 40000fe 64 ...ependencyProperty 0 shared static VerticalAlignmentProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a248 <<
047d7404 40000ff 68 ...ependencyProperty 0 shared static MarginProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a25c <<
047d7404 4000100 6c ...ependencyProperty 0 shared static StyleProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a284 <<
047d7404 4000101 70 ...ependencyProperty 0 shared static ParentProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a2ac <<
047d7404 4000102 74 ...ependencyProperty 0 shared static NameProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a2c0 <<
047d7404 4000103 78 ...ependencyProperty 0 shared static TagProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a2d4 <<
047d7404 4000104 7c ...ependencyProperty 0 shared static TagInternalProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a2fc <<
04851464 4000105 80 ...ndows.RoutedEvent 0 shared static LoadedEvent
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a420 <<
047d7404 4000106 84 ...ependencyProperty 0 shared static CursorProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a440 <<
047d7404 4000107 88 ...ependencyProperty 0 shared static InstanceDelegateStoreProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a468 <<
047d7404 4000109 8c ...ependencyProperty 0 shared static DataContextProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5a494 <<
047a1e2c 400010e 90 ...rence, mscorlib]] 0 shared static _staticDelegateList
>> Domain:Value 0433c738:NotInit 06f529d8:00000000 <<
00000000 4000264 30 ...angedEventHandler 0 instance 00000000 IsEnabledChanged
047d7404 4000252 430 ...ependencyProperty 0 shared static IsTabStopProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f59ce4 <<
047d7404 4000253 434 ...ependencyProperty 0 shared static TabIndexProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f59cf8 <<
047d7404 4000254 438 ...ependencyProperty 0 shared static TemplateProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f59d20 <<
047d7404 4000255 43c ...ependencyProperty 0 shared static TabNavigationProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f59d48 <<
047d7404 4000256 440 ...ependencyProperty 0 shared static PaddingProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f59d70 <<
047d7404 4000257 444 ...ependencyProperty 0 shared static HorizontalContentAlignmentProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f59d98 <<
047d7404 4000258 448 ...ependencyProperty 0 shared static VerticalContentAlignmentProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f59dc0 <<
047d7404 4000259 44c ...ependencyProperty 0 shared static BackgroundProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f59de8 <<
047d7404 400025a 450 ...ependencyProperty 0 shared static BorderBrushProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f59dfc <<
047d7404 400025b 454 ...ependencyProperty 0 shared static BorderThicknessProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f59e10 <<
047d7404 400025c 458 ...ependencyProperty 0 shared static FontSizeProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f59e24 <<
047d7404 400025d 45c ...ependencyProperty 0 shared static FontFamilyProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f59e4c <<
047d7404 400025e 460 ...ependencyProperty 0 shared static ForegroundProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f59e60 <<
047d7404 400025f 464 ...ependencyProperty 0 shared static FontWeightProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f59e88 <<
047d7404 4000260 468 ...ependencyProperty 0 shared static FontStyleProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f59eb0 <<
047d7404 4000261 46c ...ependencyProperty 0 shared static FontStretchProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f59ed8 <<
047d7404 4000262 470 ...ependencyProperty 0 shared static DefaultStyleKeyProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f59eec <<
047d7404 4000263 474 ...ependencyProperty 0 shared static IsEnabledProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f59f00 <<
04857f14 4000265 478 ... System.Windows]] 0 shared static _resourceDictionaryCache
>> Domain:Value 0433c738:NotInit 06f529d8:04f5cae4 <<
03cf5668 4000266 47c System.Object[] 0 shared static _controlDelgates
>> Domain:Value 0433c738:NotInit 06f529d8:04f59f14 <<
03cf44e8 40002b4 34 System.Object 0 instance 00000000 _treeContent
047d7404 40002b3 530 ...ependencyProperty 0 shared static ContentTemplateProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5bd30 <<
047d7404 40002b5 534 ...ependencyProperty 0 shared static ContentProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5bd44 <<
03d50f28 40005aa 40 System.Boolean 1 instance 1 _isLoaded
03d50f28 40005ab 41 System.Boolean 1 instance 1 _isMouseCaptured
03d50f28 40005ac 42 System.Boolean 1 instance 0 _isSpaceKeyDown
03d50f28 40005ad 43 System.Boolean 1 instance 0 _isMouseLeftButtonDown
04852208 40005ae 48 System.Windows.Point 1 instance 04f5b990 _mousePosition
048b5f98 40005af 38 ...mation.Storyboard 0 instance 00000000 _currentState
03d50f28 40005b0 44 System.Boolean 1 instance 0 _suspendStateChanges
0481fae0 40005b1 3c ...outedEventHandler 0 instance 04f5ca18 Click
047d7404 40005a6 7e0 ...ependencyProperty 0 shared static ClickModeProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5ba7c <<
047d7404 40005a7 7e4 ...ependencyProperty 0 shared static IsFocusedProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5bb38 <<
047d7404 40005a8 7e8 ...ependencyProperty 0 shared static IsMouseOverProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5bbd8 <<
047d7404 40005a9 7ec ...ependencyProperty 0 shared static IsPressedProperty
>> Domain:Value 0433c738:NotInit 06f529d8:04f5bc40 <<// dump button.Click field (9 lines above)
0:005> !do 04f5ca18
Name: System.Windows.RoutedEventHandler
MethodTable: 0481fae0
EEClass: 0482c99c
Size: 32(0x20) bytes
File: c:\Program Files\Microsoft Silverlight\2.0.31005.0\System.Windows.dll
Fields:
MT Field Offset Type VT Attr Value Name
03cf44e8 40001e0 4 System.Object 0 instance 04f59c78 _target
04663c58 40001e1 8 ...ection.MethodBase 0 instance 00000000 _methodBase
03d50a90 40001e2 c System.IntPtr 1 instance 463c08c _methodPtr
03d50a90 40001e3 10 System.IntPtr 1 instance 0 _methodPtrAux
03cf44e8 40001e4 14 System.Object 0 instance 00000000 _invocationList
03d50a90 40001e5 18 System.IntPtr 1 instance 0 _invocationCount0:005> !do -nofields 04f59c78 // verify _target is page
Name: SilverlightApplication1.Page
MethodTable: 04633a6c
EEClass: 0463196c
Size: 68(0x44) bytes
File: SilverlightApplication1, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null// verify _methodPtr points to Button_Click
// see how they are all linked together
0:005> ln 463c08c
(0463c08c) SilverlightApplication1.Page.Button_Click(System.Object, System.Windows.RoutedEventArgs)
0:005> u 463c08c // jit-ed method stub
SilverlightApplication1.Page.Button_Click(System.Object, System.Windows.RoutedEventArgs):
0463c08c b8303a6304 mov eax,4633A30h
0463c091 89ed mov ebp,ebp
0463c093 e900431c00 jmp SilverlightApplication1!Button_Click (04800398)
0463c098 0000 add byte ptr [eax],al
0463c09a 0000 add byte ptr [eax],al
0463c09c 0000 add byte ptr [eax],al
0463c09e 0000 add byte ptr [eax],al
0463c0a0 0000 add byte ptr [eax],al
0:005> u eip // jit-ed native code
SilverlightApplication1!Button_Click:
04800398 55 push ebp
04800399 8bec mov ebp,esp
0480039b 83ec08 sub esp,8
0480039e 894dfc mov dword ptr [ebp-4],ecx
048003a1 8955f8 mov dword ptr [ebp-8],edx
048003a4 833d7435630400 cmp dword ptr ds:[4633574h],0
048003ab 7405 je SilverlightApplication1!Button_Click+0x1a (048003b2)
048003ad e8862a895f call coreclr!JIT_DbgIsJustMyCode (64092e38)
0:005> !ip2md 04800398
MethodDesc: 04633a30
Method Name: SilverlightApplication1.Page.Button_Click(System.Object, System.Windows.RoutedEventArgs)
Class: 0463196c
MethodTable: 04633a6c
mdToken: 06000008
Module: 046333b4
IsJitted: yes
CodeAddr: 04800398
0:005> !dumpil 04633a30
ilAddr = 047e03fe
IL_0000: nop
IL_0001: ret
When I have time, I may write a blog post on CLR internals, to demonstrate how objects are laid out in memory, how method calls are dispatched etc.
Conclusion
This is a long post, but still it barely constitute an overview of WinDbg and SOS. Good understanding of CLR is important for coding and debugging, WinDbg with SOS is the best tool to explore CLR and do advanced debugging. Hope this short yet long post will help you get started in exploring CLR and Silverlight. Thanks!
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