The !process extension displays information about the specified process, or about all processes, including the EPROCESS block. WinDBG ( Win dows D e B u G ger) is an analytic tool used for analysing and debugging Windows crash dumps, also known as BSODs (Blue Screens of Death). Accelerated Windows Memory Dump Analysis. The hexadecimal number after the word ParentCid is the PID of the parent process. Use the following command: windbg -y SymbolPath -i ImagePath -z DumpFileName The -v option (verbose mode) is also useful. If the value for KernelTime is exceptionally high, it might identify a process that is depleting system resources. Is opposition to COVID-19 vaccines correlated with other political beliefs? Specifies the session that owns the desired process. Let's run it: By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. This tools is quite useful when the dump file is partially corrupted. For more information about the command-line syntax, see WinDbg Command-Line Options. There are several ways you can use WinDbg to open a dump file. Does anybody know the windbg command I need to run in order to know the application of the dump I'm investigating? Flags can be any combination of the following bits. When the Open Crash Dump dialog box appears, enter the full path and name of the crash dump file in the File name box, or use the dialog box to select the proper path and file name. If -1 is specified for Process information about the current process is displayed. Displays the return address and the stack pointer for each function The display of function arguments is suppressed. More info about Internet Explorer and Microsoft Edge. inforr asked on 8/5/2011 Windbg hangs on "retrieving information" I have loaded the Windows Debugging Tools on my Windows 7 machine and when I open Windbg and click View > Processes and Threads it sits there forever saying "Retrieving information" Any ideas how to make it progress? The eight-character hexadecimal number after the word PROCESS is the address of the EPROCESS block. Did Great Valley Products demonstrate full motion video on an Amiga streaming from a SCSI hard disk in 1990? The debugger displays all processes whose executable image names match ImageName. In a few seconds you should see this: Displays a list of threads associated with the process. How do I remedy "The breakpoint will not currently be hit. Thanks. The process itself can be specified by setting Process equal to the process address, setting Process equal to the process ID, or setting ImageName equal to the executable image name. A well-known and convenient but inofficial source is Codemachine where you can also download . With an EE membership, you can ask unlimited troubleshooting, research, or opinion questions. Luckily, there is $exentry which gives us the entry point and lm accepts an address with lm a

, so we have: This would still require a lot of parsing, but you can use the lm 1m approach as well: Thanks for contributing an answer to Stack Overflow! An exceptionally large working set size can be a sign of a process that is leaking memory or depleting system resources. 1996-2022 Experts Exchange, LLC. Bit 0 (0x1) The image name must match that in the EPROCESS block. In the final entry in the preceding example, the process address is 0x809258E0. Change), You are commenting using your Facebook account. starts from the second element and continues for five elements. Bit 1 (0x2) Does English have an equivalent to the Aramaic idiom "ashes on my head"? The executable being debugged can be found with |: However, that executable name may significantly differ from its module name: From the output of lm, we can see that there are addresses associated with the module. Specifies the name of the process to be displayed. You should end up with two versions of the tool: the 32-bit debugger and the 64-bit debugger. As such it is a great help for both; your first steps with WinDbg or if you ever need to reproduce a particular crash within a test environment. Command. I believe from .NET 4.0 (new CLR) thats the correct command, [] dump, open it up in windbg, and look around (there are tons of windbg cheat sheets around like this one, this one, or this one). The focus of this command will be the !analyze extension command. I can retrieve this using the !analyze -v command (do a grep on MODULE_NAME), but this looks a terrible burden just to get the name of the application. Purpose. Sign up for an EE membership and get your own personalized solution. You'd have to debug it to know for sure since any synchronous API call made on the thread would prevent it from getting to the point of checking if you had hit Ctrl+C, but it seems the most likely thing would be inability to make the network connection. Accelerated Windows Memory Dump Analysis, Part 1: Process User Space. Show all sync blocks that are owned by the current thread but not thinlocks, use !DumpHeap -thinlock, Displays deadlocks between SyncBlocks and/or ReaderWriterLocks, only managed (sosex), Get critical sections that threads are locked on (sieextpub), Lists all managed lock objects and CriticalSections and their owning threads (sosex), Lists all waiting threads and, if known, the locks they are waiting on (sosex), Displays all RWLocks or, if provided a RWLock address, details of the specified lock (sosex), Show data on the handle, if mutex or event can show the owner (procId.ThreadId), Displays a disassembly around the current instruction with interleaved source, IL and asm code (sosex), Displays a disassembly with interleaved source, IL and asm code (sosex). For many developers, WinDbg is the center of the advanced debugging universe. Accelerated Windows Memory Dump Analysis, Part 2: Kernel and Complete Spaces. Lists the amount of time the process has been running in user mode. The hexadecimal number after the word Peb is the address of the process environment block. In the first entry, the owner is the operating system itself. Toggle share menu for: Setting up WinDbg and Using Symbols Share Share . Getting started with WinDbg: 1. You can dump this array using the dx command: dx -r2 Debugger.Sessions [0].Processes. 0:016> .loadby sos clr Retrieve objects queued in the Finalizable queue. Were going [], [] helpful cheat sheet clearly describes all available commands at this []. Why? If Process is zero, the debugger displays all processes, and the process context is changed for each one. Free. set or add own or 3rd party symbols. The result contains . Go to the target machine and boot Windows from one of the debugging entries. WinDbg is a general-purpose debugger for Windows operating system applications and code. This article introduces you to the WinDbg debugging concept and tool. If you already have it installed or if you are using the packaged Chromium toolchain (which includes windbg) then you can launch it using tools\win\windbg32.bat or tools\win\windbg64.bat. When the migration is complete, you will access your Teams at stackoverflowteams.com, and they will no longer appear in the left sidebar on stackoverflow.com. WinDBG. Lists the paged and nonpaged pool used by the process. Installation or Setup. You may try .dump /mh command of WinDbg to create a dump with handle information on the Windows 2008 Server machine. The Windows Debugger (WinDbg) can be used to debug kernel-mode and user-mode code, analyze crash dumps, and examine the CPU registers while the code executes. Posted at 21:03 You can retrieve the latest version from Microsoft's web site. This function can be called only from within the filter expression of an exception handler. Stack Overflow for Teams is moving to its own domain! On the File menu, choose Open Executable. Close the log file. In WinDbg, you can view and edit registers by entering commands, by using the Registers window, or by using the Watch Window. Figure 1, how to find the server name in a memory dump The help documentation that comes with WinDbg is a very good source to learn about WinDbg. Loading stuff .loadby sos mscorwks Load SOS extension (will identify sos location by loaded mscorwks path) .load c:\Windows\Microsoft.NET\Framework\v2..50727\sos Load SOS extension for .NET 2.0 .load psscor2 Load PSSCOR To switch to a specific thread based on the OS thread ID that sys.dm_os_threads reports, you can use the following WinDbg command: ~~ [tid]s The place. This extension can be used only during kernel-mode debugging. Also this seems to be working fine: This means that I need to get the name of the application of the dumpfile (it seems to be gone during some formatting). Lists the current, minimum and maximum working set size for the process, in pages. Use the following command: windbg -y SymbolPath -i ImagePath -z DumpFileName. But the accepted answer, from dave black, (since MS has updated the content), seems to just be for Windows 8, and seems to be more than just windbg. The value of Process determines whether the !process extension displays a process address or a process ID . Practical Foundations of Windows Debugging, Disassembling, Reversing. /m **** Module How to understand "round up" in this context? To display full details on one process, set Flags to 7. Process The name of the module that owns the process. As part of the Debugging Tools for Windows, WinDbg is a very known debugging tool that can use for both live and postmortem debug, user and kernel mode with a graphical user interface.. No symbols have been loaded for this document." The following is an example of a !process 0 0 display: The following table describes some of the elements of the !process 0 0 output. Is there a Windbg command for retrieving the module_name of a dump? This information is listed in the third line of output after the thread header. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Production Debugging: A story about Exception code: 0xe053534f - Fog Creek Blog, Production Debugging: A story about Exception code: 0xe053534f - SkyOffice Consulting | SkyOffice Consulting, Uncovering a Memory Leak using WinDbg | Steve's Programming Blog, Load SOS extension (will identify sos location by loaded mscorwks path), .load c:\Windows\Microsoft.NET\Framework\v2.0.50727\sos, Latest extension commands help (SOS,SOSEX,PSSCOR), Like !help but for specifically for SOSEX, Display this screen or details about the specified command (SOSEX), Run dumpstack on all threads and show only interesting (lock, hijacked, managed), unmanaged and managed call stack, better than !dumpheap (sosex), Unmanaged stack with arguments (kb4 limits stack to 4 frames), Unmanaged stacks without duplication, nice if have many worker threads, !dso [-verify] [top stack [bottom stack]], Objects stack trace (the actual object type and not where the method is), !mdso [/a | /r | /c:n | /t: | /mt:], Dumps object references on the stack and in CPU registers in the current context, !name2ee mscorlib.dll System.Threading.Thread. It turns out that sosex can also help with this; it can look up type information given a partial name:!mx System.Nullable* This returns clickable links, amongst which are "get_Value" which exposes a MethodTable for retrieving the content with !DumpVC. The following table describes some of the elements in the previous example. CrashMe is a simple application that implements several common debug situations and scenarios. We've updated WinDbg to have more modern visuals, faster windows, a full-fledged scripting experience, built with the easily extensible debugger data model front and center. Flags All rights reserved. Follow reference for the given pointer (handle) address, Save the module dll to a file (can be used to get its version), Dump heap data that can be used by CLR profiler, displays all elements of the TEB or Thread Environment Block, !strings [ModuleAddress] [min] [max] [gen#] [filter], Search the managed heap or a module for strings matching the specified criteria, Displays the type of managed data located at the specified address or the current instruction pointer, Show data on the loaded modules (mscorwks, clr), Show version and paths of all loaded modules (sieextpub), searches the systems RPC state information for endpoint information (rpcexts).
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