gvisor.dev/gvisor@v0.0.0-20240520182842-f9d4d51c7e0f/pkg/sentry/time/vdso_test.go (about)

     1  // Copyright 2021 The gVisor Authors.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package time
    16  
    17  import (
    18  	"syscall"
    19  	"testing"
    20  	"unsafe"
    21  
    22  	"golang.org/x/sys/unix"
    23  	"gvisor.dev/gvisor/pkg/abi/linux"
    24  )
    25  
    26  func TestClockGetTime(t *testing.T) {
    27  	ts := unix.Timespec{}
    28  	if ret := vdsoClockGettime(linux.CLOCK_MONOTONIC, &ts); ret != 0 {
    29  		t.Fatalf("Unexpected error code: %v", ret)
    30  	}
    31  	sts := unix.Timespec{}
    32  	if _, _, errno := unix.RawSyscall(unix.SYS_CLOCK_GETTIME,
    33  		uintptr(linux.CLOCK_MONOTONIC),
    34  		uintptr(unsafe.Pointer(&sts)), 0); errno != 0 {
    35  		t.Fatalf("Unexpected error code: %v", errno)
    36  	}
    37  	// Check that ts.Sec is in [sts.Sec, sts.Sec + 5].
    38  	if sts.Sec < ts.Sec || sts.Sec > ts.Sec+5 {
    39  		t.Fatalf("Unexpected delta: vdso %+v syscall %+v", ts, sts)
    40  	}
    41  }
    42  
    43  func TestClockGetTimeEINVAL(t *testing.T) {
    44  	ts := unix.Timespec{}
    45  	if ret := vdsoClockGettime(-1, &ts); ret != -int(syscall.EINVAL) {
    46  		t.Fatalf("Unexpected error code: %v", ret)
    47  	}
    48  }