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Can Themida/WinLicense macros protect switch statements and try-except clauses?
| Reference Number: AA-00272 Views: 714 |
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Switch-Case statements and try-except clauses cannot work with Themida/WinLicense 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 Themida/WinLicense macros, like:
switch (var)
{
case 0:
VM_START
// your code
VM_END
case 1:
VM_START
// your code
VM_END
...
}
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For try-except clauses:
try
{
VM_START
// your code
VM_END
}
except
{
VM_START
// your code
VM_END
} |
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