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https://git.kernel.org/pub/scm/libs/libcap/libcap.git
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db256cd8f6
This demonstrates libpsx-2.72+ is now compatibile with the std::thread variety of C++ threading under Linux. This completes support for: https://bugzilla.kernel.org/show_bug.cgi?id=218607 Signed-off-by: Andrew G. Morgan <morgan@kernel.org>
58 lines
1.3 KiB
C++
58 lines
1.3 KiB
C++
#include <condition_variable>
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#include <iostream>
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#include <mutex>
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#include <thread>
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#include <unistd.h>
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#include <sys/prctl.h>
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#include <sys/psx_syscall.h>
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#include <sys/syscall.h>
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std::mutex mu;
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std::condition_variable cv;
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bool ready = false;
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long int in_before = 0, out_before = 0;
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long int in_after = 0, out_after = 0;
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int main()
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{
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std::thread t{[]() {
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std::unique_lock lk(mu);
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in_before = syscall(__NR_prctl, PR_GET_NO_NEW_PRIVS, 0, 0, 0, 0, 0);
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ready = true;
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cv.notify_one();
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cv.wait(lk, []{ return !ready; });
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in_after = syscall(__NR_prctl, PR_GET_NO_NEW_PRIVS, 0, 0, 0, 0, 0);
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lk.unlock();
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}};
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out_before = syscall(__NR_prctl, PR_GET_NO_NEW_PRIVS, 0, 0, 0, 0, 0);
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std::unique_lock lk(mu);
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cv.wait(lk, []{ return ready; });
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psx_syscall6(__NR_prctl, PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0, 0);
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ready = false;
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cv.notify_one();
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lk.unlock();
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out_after = syscall(__NR_prctl, PR_GET_NO_NEW_PRIVS, 0, 0, 0, 0, 0);
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t.join();
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std::cout << "before got in:" << in_before <<
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" out:" << out_before << std::endl;
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std::cout << "after got in:" << in_after <<
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" out:" << out_after << std::endl;
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if ((in_after & out_after) & !(in_before | out_before)) {
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std::cout << "PASSED\n";
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return 0;
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} else {
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std::cout << "FAILED\n";
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return 1;
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}
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}
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