CompiledProgram::CompiledProgram(Program in_program)
{
mProgSize=0;
for (Program::iterator i=in_program.begin(); i!=in_program.end(); i++)
{
mProgSize+=i->size();
}
mpProg=VirtualAlloc(
NULL,
mProgSize,
MEM_COMMIT | MEM_RESERVE,
PAGE_READWRITE
);
if (mpProg == NULL )
exit(0);
size_t progPos=0;
for (Program::iterator i=in_program.begin(); i!=in_program.end(); i++)
{
memcpy((unsigned char*) mpProg+progPos, &(*i)[0], i->size());
progPos+=i->size();
}
DWORD flOldProtect;
if (!VirtualProtect(mpProg, size(), PAGE_EXECUTE, &flOldProtect))
exit(0);
if (!FlushInstructionCache(GetCurrentProcess(), mpProg, size()))
exit(0);
}
Program MutationCache::mutateProgram(const Program& program, Mutation mutation)
{
auto start = program.begin();
auto programLen = program.size();
auto instruction = getMutationInstruction(mutation);
auto position = getMutationPosition(mutation);
switch(getMutationType(mutation))
{
case addition:
{
Program result(start, start + position);
result.push_back(instruction);
result.insert(result.end(), start + position, program.end());
return result;
}
break;
case removal:
{
Program result(start, start + position);
result.insert(result.end(), start + position + 1, program.end());
return result;
}
break;
case substitution:
{
Program result = program;
result[position] = (result[position] + instruction) % instructionCount;
return result;
}
default:
throw;
}
}