Function ProbePreciseIp

Source/ThirdParty/tracy/client/TracySysTrace.cpp:690–716

};

static void ProbePreciseIp( perf_event_attr& pe, unsigned long long config0, unsigned long long config1, pid_t pid )
{
    pe.config = config1;
    pe.precise_ip = 3;
    while( pe.precise_ip != 0 )
    {
        const int fd = perf_event_open( &pe, pid, 0, -1, PERF_FLAG_FD_CLOEXEC );
        if( fd != -1 )
        {
            close( fd );
            break;
        }
        pe.precise_ip--;
    }
    pe.config = config0;
    while( pe.precise_ip != 0 )
    {
        const int fd = perf_event_open( &pe, pid, 0, -1, PERF_FLAG_FD_CLOEXEC );
        if( fd != -1 )
        {
            close( fd );
            break;
        }
        pe.precise_ip--;
    }
    TracyDebug( "  Probed precise_ip: %i\n", pe.precise_ip );
}

static void ProbePreciseIp( perf_event_attr& pe, pid_t pid )
{