Dr Memory fails due to bcrypt.dll

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Keith S

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Jun 30, 2025, 12:22:18 PMJun 30
to Dr. Memory Users
I'm trying to find a usable memory leak checker for WIndows, and came across Dr Memory. When I try it, I get an error:

~~Dr.M~~ WARNING: unable to locate results file: can't open C:\Users\keith\AppData\Roaming\Dr. Memory/resfile.40428 (code=2).
Dr. Memory failed to start the target application, perhaps due to
interference from invasive security software.
Try disabling other software or running in a virtual machine.
WARNING: Examine the following unusual libraries in this process to help identify
invasive software that may have affected the target application:

        C:\WINDOWS\System32\bcrypt.dll

Please file a bug about this at http://drmemory.org/issues
~~Dr.M~~ WARNING: application exited with abnormal code 0xc0000005

Now bcrypt.dll is a WIndows dll as far as I know, why should this cause a problem? 

Derek Bruening

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Jun 30, 2025, 12:28:59 PMJun 30
to drmemor...@googlegroups.com
It may be invasive security software like Crowdstrike Falcon causing the problem: see https://github.com/DynamoRIO/dynamorio/issues/7024.   The printing of libraries is a diagnostic step after early failure; bcrypt is now on the list so it won't be printed any more: https://github.com/DynamoRIO/drmemory/pull/2516.

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