-highentropyva (Visual Basic)

Indicates whether a 64-bit executable or an executable that's marked by the -platform:anycpu compiler option supports high entropy Address Space Layout Randomization (ASLR).

Syntax

-highentropyva[+ | -]  

Arguments

+ | -
Optional. The option is off by default or if you specify -highentropyva-. The option is on if you specify -highentropyva or -highentropyva+.

Remarks

If you specify this option, compatible versions of the Windows kernel can use higher degrees of entropy when the kernel randomizes the address space layout of a process as part of ASLR. If the kernel uses higher degrees of entropy, a larger number of addresses can be allocated to memory regions such as stacks and heaps. As a result, it is more difficult to guess the location of a particular memory region.

When the option is on, the target executable and any modules on which it depends must be able to handle pointer values that are larger than 4 gigabytes (GB) when those modules are running as 64-bit processes.

See also

• Visual Basic Command-Line Compiler
• Sample Compilation Command Lines