// 2. On Linux node, total physical memory is read from MemTotal in /proc/meminfo.
	// GlobalMemoryStatusEx returns the amount of physical memory that is available
	// for the operating system to use. The amount returned by GlobalMemoryStatusEx
	// is closer in parity with Linux
	// https://www.kernel.org/doc/Documentation/filesystems/proc.txt
	var statex MemoryStatusEx
	statex.Length = uint32(unsafe.Sizeof(statex))

	// Success case, where path doesn't have any mounts.
	{
		if err = mounts.checkCrossMounts("/path/to/x"); err != nil {
			t.Fatalf("Expected success, failed instead (%s)", err)
		}
	}
}

// Tests read proc mounts file.
func TestReadProcmountInfos(t *testing.T) {
	successCase := `/dev/0 /path/to/0 type0 flags 0 0
		/dev/1    /path/to/1   type1	flags 1 1
		/dev/2 /path/to/2 type2 flags,1,2=3 2 2
		`
	var err error

	procCgroupEmpty := ""
	verifyContainerName(procCgroupEmpty, "", true, t)

	content, err := os.ReadFile("example_proc_cgroup")
	if err != nil {
		t.Errorf("Could not read example /proc cgroup file")
	}
	verifyContainerName(string(content), "/user/1000.user/c1.session", false, t)

	procCgroupNoDevice := "2:freezer:docker/kubelet\n5:cpuacct:pkg/kubectl"
	verifyContainerName(procCgroupNoDevice, "", true, t)

	if($dynimports !~ /\s+${sysvarname}\s+/) {
		$dynimports .= "//go:cgo_import_dynamic ${sysvarname} ${sysname} \"$modname\"\n";
		# Link symbol to proc address variable.
		$linknames .= "//go:linkname ${sysvarname} ${sysvarname}\n";
		# Library proc address variable.
		push @vars, $sysvarname;
	}

	# Go function header.
	$out = join(', ', @out);
	if($out ne "") {
		$out = " ($out)";
	}

	}

	// Make sure core pattern will send core to the current directory.
	b, err := os.ReadFile("/proc/sys/kernel/core_pattern")
	if err != nil {
		t.Fatalf("error reading core_pattern: %v", err)
	}
	if string(b) != "core\n" {
		t.Skipf("Unexpected core pattern %q", string(b))
	}

	coreUsesPID := false
	b, err = os.ReadFile("/proc/sys/kernel/core_uses_pid")
	if err == nil {
		switch string(bytes.TrimSpace(b)) {
		case "0":

	if e != nil {
		return nil, &PathError{Op: "fork/exec", Path: name, Err: e}
	}

	return newPIDProcess(pid), nil
}

func (p *Process) writeProcFile(file string, data string) error {
	f, e := OpenFile("/proc/"+itoa.Itoa(p.Pid)+"/"+file, O_WRONLY, 0)
	if e != nil {
		return e
	}
	defer f.Close()
	_, e = f.Write([]byte(data))
	return e
}

func (p *Process) signal(sig Signal) error {
	switch p.pidStatus() {

      .*_cgo_gotypes\.go:[0-9]+ \+0x[0-9,a-f]+
  _cgoexp_[0-9a-z]+_goCallback\(\)
      <autogenerated>:1 \+0x[0-9,a-f]+

Goroutine [0-9] \(running\) created at:
  runtime\.newextram\(\)
      .*/runtime/proc.go:[0-9]+ \+0x[0-9,a-f]+
==================`,
		`==================
WARNING: DATA RACE
Read at 0x[0-9,a-f]+ by .*:
  main\..*
      .*/main\.go:[0-9]+ \+0x[0-9,a-f]+(?s).*

// execution environment in which the above system calls are restricted by
// seccomp or a similar technology.
func checkPidfd() error {
	// Get a pidfd of the current process (opening of "/proc/self" won't
	// work for waitid).
	fd, err := unix.PidFDOpen(syscall.Getpid(), 0)
	if err != nil {
		return NewSyscallError("pidfd_open", err)
	}
	defer syscall.Close(int(fd))

}

func (g *goroutineGenerator) ProcRange(ctx *traceContext, ev *trace.Event) {
	// TODO(mknyszek): Extend procRangeGenerator to support rendering proc ranges
	// that overlap with a goroutine's execution.
}

func (g *goroutineGenerator) ProcTransition(ctx *traceContext, ev *trace.Event) {

		logger.Info("Set sysctl", "entry", entry, "value", value)
		if err := sys.SetSysctl(entry, value); err != nil {
			return err
		}
	}
	return nil
}

// isSysFSWritable checks /proc/mounts to see whether sysfs is 'rw' or not.
func (rct realConntracker) isSysFSWritable(ctx context.Context) (bool, error) {
	logger := klog.FromContext(ctx)
	const permWritable = "rw"
	const sysfsDevice = "sysfs"