How does dependency walker work




















Updated internal information about known OS versions, build numbers, and flags up to the Vista RC1 build. Support for Side-by-Side versioning of modules. Detection of dynamically loaded modules, including details about which module actually called LoadLibrary to dynamically load the module. Detection of dynamically called functions, including details about which module actually called GetProcAddress to obtain the function address.

Detection of delay-load dependencies. Console mode that allows Dependency Walker to be ran without its graphical interface being displayed. This is useful for batch files and unattended automation of Dependency Walker features.

Command line options to configure module search order, column sorting, output files, profiling, and other settings. Ability to monitor module entrypoints like DllMain looking for module initialization failures. Search for the name of the. The second occurrence of this should be the list of imports from this. In the above example, QAccessible -related symbols are missing — in this case this is because the version of Qt being used by the application has been built without the Accessibility module.

Load the desired. Start Profiling Command Profile Menu. Profile Module Dialog. NET assemblies. These techniques are all implemented as layers above the core Windows API. In the end, these layers still need to call down to the core Windows functions like LoadLibrary and GetProcAddress to do the actual work. It is at this core level that Dependency Walker understands what is going on.

So, while Dependency Walker may not understand all the language specific complexities of your application, it will still be able to track all module activity at a core Windows API level. Dependency Walker will work with any bit or bit Windows module.

There are bit and bit versions Dependency Walker. All versions are capable or opening bit and bit modules. However, there are major advantages to using the bit Dependency Walker to process bit modules and the bit Dependency Walker to process bit modules. This is especially true when running on a bit version of Windows, which allows execution of both bit and bit programs.

The bit subsystem on bit Windows known as "WOW64" has its own private registry, "AppPaths", "KnownDlls", system folders, and manifest processing. Only the bit version of Dependency Walker can access this bit environment, which is needed to accurately process a bit module. Likewise, only the bit version of Dependency Walker can fully access the bit environment, so it should always be used for processing bit modules. The profiling option works by actually executing your application and watching it to see what it loads.

In order for this to be possible, you need to have opened an executable usually has an EXE extension rather than a DLL. The profiling feature also requires that the executable you have loaded is for the same CPU architecture as the version of Dependency Walker you are currently running.

For example, you need the bit x86 version of Dependency Walker to profile a bit x86 executable, and the bit x64 version of Dependency Walker to profile a bit x64 executable.

However, Dependency Walker automatically tries to locate dependent modules using the default Windows module search path.

For Windows CE modules, this can cause errors since non-CE modules may be found in the default search path. To fix this, you can use Dependency Walker's " Configure Module Search Order " dialog to remove all standard paths and then add a private folder of your own that contains only CE modules. Dependency Walker only supports bit and bit Windows modules. It never has and never will support bit. See the Overview of Module Version Numbers section for the details.

No, but you can save the results to several different text formats which can be viewed or printed from a text viewer program like Notepad. Dependency Walker supports several ways to capture the data in a session. All the views support simple copying from them using the Copy Command. Dependency Walker also supports several methods of saving the entire session to a file. There are various text formats that can be easily printed or emailed to someone for viewing.

You can also save the results to a Dependency Walker Image DWI file, which can be loaded by Dependency Walker on another computer to see the captured results from your computer. For more information on saving the session to a file, see the Save Command and File Save Dialog section. Each view in Dependency Walker has detailed help describing what the icons mean for that view. See the Module Session Window section for a list of views.

All the list views in Dependency Walker can be sorted and searched. Any text you type while in a list view will search for that text in the column that the list is currently sorted by. For example, if the export function list is sorted by function names and you type "Get", the first function that starts with "Get" will be highlighted.

This will work for any column in any list. For more details, see the help sections for the actual list views. Often users are missing libraries or have the wrong version, this should be easily interpretable from dependency walker output. In other cases, just seeing where mozilla dies can allow triagers to guess what should happen next which enables them to suggest the likely problem.

For more information see the distribution site or read its online help.



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