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#include <condition_variable>
#include <iostream>
#include <mutex>
#include <thread>
#include <unistd.h>
#include <sys/prctl.h>
#include <sys/psx_syscall.h>
#include <sys/syscall.h>
std::mutex mu;
std::condition_variable cv;
bool ready = false;
long int in_before = 0, out_before = 0;
long int in_after = 0, out_after = 0;
int main()
{
std::thread t{[]() {
std::unique_lock lk(mu);
in_before = syscall(__NR_prctl, PR_GET_NO_NEW_PRIVS, 0, 0, 0, 0, 0);
ready = true;
cv.notify_one();
cv.wait(lk, []{ return !ready; });
in_after = syscall(__NR_prctl, PR_GET_NO_NEW_PRIVS, 0, 0, 0, 0, 0);
lk.unlock();
}};
out_before = syscall(__NR_prctl, PR_GET_NO_NEW_PRIVS, 0, 0, 0, 0, 0);
std::unique_lock lk(mu);
cv.wait(lk, []{ return ready; });
psx_syscall6(__NR_prctl, PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0, 0);
ready = false;
cv.notify_one();
lk.unlock();
out_after = syscall(__NR_prctl, PR_GET_NO_NEW_PRIVS, 0, 0, 0, 0, 0);
t.join();
std::cout << "before got in:" << in_before <<
" out:" << out_before << std::endl;
std::cout << "after got in:" << in_after <<
" out:" << out_after << std::endl;
if ((in_after & out_after) & !(in_before | out_before)) {
std::cout << "PASSED\n";
return 0;
} else {
std::cout << "FAILED\n";
return 1;
}
}
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