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#include <stdio.h>
#include <fcntl.h>
#include <chrono>
#include <thread>
#if defined(__linux__)
#include <sys/prctl.h>
#endif
volatile bool debugger_flag = true; // The debugger will flip this to false
void *start(void *data)
{
int i;
size_t idx = (size_t)data;
for (i=0; i<30; i++)
{
if ( idx == 0 && debugger_flag)
std::this_thread::sleep_for(std::chrono::microseconds(1)); // Set breakpoint here
std::this_thread::sleep_for(std::chrono::seconds(1));
}
return 0;
}
int main(int argc, char const *argv[])
{
#if defined(__linux__)
// Immediately enable any ptracer so that we can allow the stub attach
// operation to succeed. Some Linux kernels are locked down so that
// only an ancestor process can be a ptracer of a process. This disables that
// restriction. Without it, attach-related stub tests will fail.
#if defined(PR_SET_PTRACER) && defined(PR_SET_PTRACER_ANY)
// For now we execute on best effort basis. If this fails for
// some reason, so be it.
const int prctl_result = prctl(PR_SET_PTRACER, PR_SET_PTRACER_ANY, 0, 0, 0);
static_cast<void> (prctl_result);
#endif
#endif
static const size_t nthreads = 16;
std::thread threads[nthreads];
size_t i;
for (i=0; i<nthreads; i++)
threads[i] = std::move(std::thread(start, (void*)i));
for (i=0; i<nthreads; i++)
threads[i].join();
}
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