How To Use The Driver Verifier To Troubleshoot Windows Drivers  


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The Driver Verifier is included in Windows 2000, Windows XP, and Windows Server 2003 to improve stability and reliability; you can use this tool to troubleshoot driver windows 10 iso mode components can damage the system or cause system failures if a driver is not written properly, such as an earlier version of the download windows 10 iso  Driver Model (WDM) driver. This article describes how to use the Driver Verifier to isolate and troubleshoot a driver in the system.

More information

  • This article is organized around the following topics:
  • Features of the Driver Verifier
  • I / O checker
  • Driver Verifier Requirements
  • Activating the Driver Verifier
  • Debugging Access Violations of the Driver Verifier
  • Driver Checker and Graphics Drivers
  • Global counters
  • Pool tracking
  • Settings
  • Volatile parameters
  • Command line interface
  • Additional information for driver developers

Features of the Driver Verifier

You can use the Driver Verifier by running Verifier.exe, and then restarting your computer. You do not need to make any other changes to begin analyzing drivers in the system.

The Driver Verifier provides the following features.

Pool allocations

Attempts to allocate all the pool allocations of a driver from a special pool. Instead of sharing pool allocations with the rest of the system, the allocations for this driver are isolated and bound by No Access permissions. This feature determines whether a driver allocates more than its share of the pool and therefore damages the system or causes it to become unstable. When you enable this feature and the target computer has sufficient physical and virtual memory, all driver allocations are automatically redirected to a special pool.

Important memory pressure

You can exert strong memory pressure on a specific driver without affecting other drivers (regardless of the size of the system memory). To do this, tell the memory manager to invalidate all paging driver code and data, as well as the pool, code, and pageable system data. This allows you to detect a driver that incorrectly contains spinlock locks that incorrectly elevate interrupt request levels (IRQL), and then gain access to data or paginated code. This feature can detect intermittent problems and determine the cause.

Validation of parameters

All spinlock, IRQL, and pool allocation settings made by the driver are validated automatically. This means that checks are made to ensure the following:

A high IRQL level is really a high IRQL level (the current IRQL level is lower than the target IRQL level).

The spinlock lock acquisitions / releases are done at the appropriate IRQL level.

The paged pool allocations / releases are at the correct IRQL level (APC_LEVEL or below).

Non paged pool allocations / releases are at the correct IRQL level (DISPATCH_LEVEL or below).

It is possible to randomly fail pool allocations that are not marked MUST_SUCCEED by the driver, to ensure that the driver can correctly handle a low memory situation.

Pool being released

Any released pool is examined to ensure that no pending timers are in the pool allocation, as this will make it extremely difficult to track system failures.

System leak detection

All pilot pool allocations are automatically tracked. When unloading the driver, a bug check occurs if any of the allocations are not released.  download windows 10 iso You can then use the kernel debugger command ! Verifier 3 to display all allocations that are not released. You can also use this command before unloading to view the current driver allocations at any time.

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