Windbg 32 Bit Download
Gauthier Zitnik
ps: I am not looking for a nifty command, those can be found in the documentation. How about sharing tips on doing something that one couldn't otherwise imagine could be done with windbg? e.g. Some way to generate statistics about memory allocations when a process is run under windbg.
My favorite is the command .cmdtree (undocumented, but referenced in previous release notes). This can assist in bringing up another window (that can be docked) to display helpful or commonly used commands. This can help make the user much more productive using the tool.
Alt + 1 will place focus into the command window so that you can actually type a command and so that up-arrow actually scrolls through command history. However, it doesn't work if your focus is already in the scrollable command history.
This is a fairly recent addition to WinDbg, and it's not documented in the help file. There is however some documentation in "dml.doc" in the installation directory for the Debugging Tools for Windows.
My day-to-day work involves maintenance on a meta-modeler that provides generic objects and relationship between objects for a large piece of C++ software. At first, to ease debugging, I had written a simple dump script that extracts relevant information from these objects.
Obviously, this a pretty canned example, but this stuff is really invaluable for me. Instead of hunting around in very complex objects for the right data members (which usually took up to a minute and various casting and dereferencing trickery), everything is automated in one click!
Note: it seems different versions of WinDbg will have different class names for the window and controls, so you might want to use the window spy tool provided by AutoHotkey to find the actual class names first.
For command & straightforward (static or automatable) routines where the debugger is used, it is very cool to be able to put all the debugger commands to run through in a text command file and run that as input through kd.exe or cdb.exe, callable via a batch script, etc.
Run that whenever you need to do this same old routine, without having to fire up WinDbg and do things manually. Too bad this doesn't work when you aren't sure what you are looking for, or some command parameters need manual analysis to find/get.
Background: I'm new to WinDbg and trying to get it running for the first time. I want to examine a memory dump I took from a running ASP.NET 4 site hosted in IIS 7 on Windows Server 2008 (x86) and downloaded to my local machine.
I installed the debugging tools and launched WinDbg for the first time, opening the crash dump. I went to File Symbol File Path and set the path to *srv*c:\symbols* * and waited for all the symbols to load.
Also, if you're on 64 bit, you should install the 32 bit version of Debugging Tools for Windows as well in order to debug 32 bit apps. They install side-by-side, so there's no problem in having both the 32 bit and the 64 bit version on the same machine.
JOHN ROBBINS has nice article around it, See that Microsoft symbol servers are configured in symbol file path and run !analyze -v on windbg prompt, this will do the trick it will download relevant sos files. To verify run .chain on the prompt and you will see the loaded dll.
I am doing windows driver debugging and am trying to connect to Windows 10 on a virtual box guest. I have set up a serial port on virtual box on COM1 as a Host Pipe with a name \\.\pipe\windebugpipe and have left Connect to existing pip/socket unchecked.
On the guest, I have edited the dbgsettings w/ bcdedit to use these with a baud rate of 115200 (and have also tried it without having these settings). I can see in the logs that the pipe is actually created, and using Putty I can actually connect and send data.
I have tried on both the GUI and from powershell, both with administrator privileges, to connect with windbg. The command I use is windbg -b -k com:pipe,port=\\.\pipe\windebugpipe,resets=0,reconnect. Both show no output beyond Waiting to reconnect and saying that the Debugee is not connected.
Whats interesting is that using Windbg through visual studio DOES seem to work, although I can't seem to get it working through COM ports there either. Just a net connection. Using the net connection does not work with windbg outside either. I've found some articles online saying you can attach yourself to that process, but it seems like that is no longer possible in Windows 10?
Forgot to post that I found an answer. I had to change my debug settings with bcdedit /dbgsettings serial debugport:1 baudrate:11520. What is strange is I had tried that before so there must have been something else I changed in the middle to bridge the gap.
I am forcing a dr watson crash dump on a process by drwtsn32 -p
to look into the internal state of my process; I am able to do that
with a good user.dmp file and have confirmed with !sym noisy command
of windbg that my symbol files are placed correctly; i am using
microsoft public symbol server for os symbol files. But windbg keeps
on giving me warning that "Unable to verify checksum for ".I have also tried using "symchk" tool from microsoft to verify that
my pdb file is correct for my dll.Hence inside windbg I am able to see all the threads and corresponding
stack of them for my process, but some how it does not take me to the
correct source file. I also verified with .srcpath command that my
source path is good.OS I am running on: win2k proHelp is greatly appreciated.Regards- Rajesh
WinDbg is agreat, free tool. It is more powerful than Visual Studio's built-in debugger,but is harder to use (kind of like gdb on Linux). You can retrieve the latestSDK version fromMicrosoft's web site. You should end up with two versions of the tool: the32-bit debugger and the 64-bit debugger. If you already have it installed or ifyou are using the packaged Chromium toolchain (which includes windbg) then youcan launch it using tools\win\windbg32.bat or tools\win\windbg64.bat. Thesebatch files find and run the appropriate version, wherever it is.
You can also install WinDbg Preview, the new/preview version of WinDbg, from theMicrosoft Store or this link. Discussion ofvarious issues around getting this version can be found here.WinDbg Preview is being more actively developed and has a friendlierout-of-box experience so it is probably the best choice for new WinDbg users.The executable name for WinDbg Preview is WinDbgX.exe so substitute that forwindbg in examples below. WinDbgX.exe should automatically be in your path onceyou install it.
Once you're started, you may wish to fix a few things. If you have run WinDbgbefore and saved any workspaces, you may wish to start with a clean slate bydeleting the key HKCU\Software\Microsoft\Windbg using your favorite registryeditor.
One of the major benefits of WinDbg for debugging Chromium is its ability toautomatically debug child processes. This allows you to skip all the complicatedinstructions above. The easiest way to enable this is to check "Debug childprocesses also" in the "Open Executable" dialog box when you start debuggingor start "windbg.exe -o". NOTE that on 64-bit Windows you may need to usethe 64-bitWinDbg forthis to work. You can switch dynamically the setting on and off at will withthe .childdbg 10 command, to follow a particular renderer creation. You canalso attach to a running process (F6) and even detach without crashing theprocess (.detach)
To automatically attach to processes you want to run over and over with complexcommand lines, just attach WinDbg to your command prompt and then .childdbg1 the command prompt - any processes launched from there will automatically bedebugged. H/T pennymac@
If you want a chance to do this when you first launch the browser process thenyou need to launch it without -g (so that the first breakpoint will be hit). Youwill probably then want to disable the "Create process" breakpoint and "Initialbreakpoint" with these commands:
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Microsoft Windows Debugger (WinDbg) is a powerful Windows-based debugger that is capable of both user-mode and kernel-mode debugging. WinDbg provides debugging for the Windows kernel, kernel-mode drivers, and system services, as well as user-mode applications and drivers. ***This Package will add an environment variable pointing to the Microsoft symbols and will also copy sos.dll from the most recent .net runtime on your machine to the same directory where windbg.exe is installed.
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