Themida > FAQ > Macros > Can VM macros protect switch statements? We are now having an issue with VM macros crashing the application.

Switch-Case statements cannot work with VM macros in most compilers.

Compilers generate a direct jump table in the data section which directly jumps to each "case" statement. When the code is virtualized, the jump goes into a virtualized (garbage) code and it produces exception. You can use a workaround to protect your switch-case statements with VM macros, like:

switch (var)

{

case 0:

VM_START

// your code

VM_END

case 1:

VM_START

// your code

VM_END

...

}