ptrace_linux_amd64_test.go

Documentation: github.com/chaos-mesh/chaos-mesh/pkg/ptrace

     1  // Copyright 2021 Chaos Mesh 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  //go:build cgo
    16  
    17  package ptrace
    18  
    19  import (
    20  	"encoding/binary"
    21  	"math/rand"
    22  	"os"
    23  	"os/exec"
    24  	"testing"
    25  	"time"
    26  	"unsafe"
    27  
    28  	"github.com/go-logr/zapr"
    29  	. "github.com/onsi/ginkgo"
    30  	. "github.com/onsi/gomega"
    31  	"go.uber.org/zap"
    32  	"sigs.k8s.io/controller-runtime/pkg/envtest/printer"
    33  
    34  	"github.com/chaos-mesh/chaos-mesh/test/pkg/timer"
    35  )
    36  
    37  func TestPTrace(t *testing.T) {
    38  	RegisterFailHandler(Fail)
    39  
    40  	RunSpecsWithDefaultAndCustomReporters(t,
    41  		"PTrace Suit",
    42  		[]Reporter{printer.NewlineReporter{}})
    43  }
    44  
    45  var _ = BeforeSuite(func(done Done) {
    46  	rand.Seed(GinkgoRandomSeed())
    47  
    48  	By("change working directory")
    49  
    50  	err := os.Chdir("../../")
    51  	Expect(err).NotTo(HaveOccurred())
    52  
    53  	By("register logger")
    54  	zapLog, err := zap.NewDevelopment()
    55  	Expect(err).NotTo(HaveOccurred())
    56  	log := zapr.NewLogger(zapLog)
    57  	RegisterLogger(log)
    58  
    59  	close(done)
    60  })
    61  
    62  // These tests are written in BDD-style using Ginkgo framework. Refer to
    63  // http://onsi.github.io/ginkgo to learn more.
    64  
    65  var _ = Describe("PTrace", func() {
    66  
    67  	var t *timer.Timer
    68  	var program *TracedProgram
    69  
    70  	BeforeEach(func() {
    71  		var err error
    72  
    73  		t, err = timer.StartTimer()
    74  		Expect(err).ShouldNot(HaveOccurred(), "error: %+v", err)
    75  
    76  		time.Sleep(time.Millisecond)
    77  
    78  		program, err = Trace(t.Pid())
    79  		Expect(err).ShouldNot(HaveOccurred(), "error: %+v", err)
    80  	})
    81  
    82  	AfterEach(func() {
    83  		err := program.Detach()
    84  		Expect(err).ShouldNot(HaveOccurred(), "error: %+v", err)
    85  
    86  		err = t.Stop()
    87  		Expect(err).ShouldNot(HaveOccurred(), "error: %+v", err)
    88  	})
    89  
    90  	It("should mmap slice successfully", func() {
    91  		Expect(program.Pid()).Should(Equal(t.Pid()))
    92  
    93  		helloWorld := []byte("Hello World")
    94  		entry, err := program.MmapSlice(helloWorld)
    95  		Expect(err).ShouldNot(HaveOccurred(), "error: %+v", err)
    96  
    97  		readBuf, err := program.ReadSlice(entry.StartAddress, uint64(len(helloWorld)))
    98  		Expect(err).ShouldNot(HaveOccurred(), "error: %+v", err)
    99  
   100  		Expect(*readBuf).Should(Equal(helloWorld))
   101  	})
   102  
   103  	It("double trace should get error", func() {
   104  		_, err := Trace(t.Pid())
   105  		Expect(err).Should(HaveOccurred())
   106  	})
   107  
   108  	It("should ptrace write slice successfully", func() {
   109  		helloWorld := []byte("Hello World")
   110  		addr, err := program.Mmap(uint64(len(helloWorld)), 0)
   111  		Expect(err).ShouldNot(HaveOccurred(), "error: %+v", err)
   112  
   113  		err = program.PtraceWriteSlice(addr, helloWorld)
   114  		Expect(err).ShouldNot(HaveOccurred(), "error: %+v, addr: %d", err, addr)
   115  
   116  		readBuf, err := program.ReadSlice(addr, uint64(len(helloWorld)))
   117  		Expect(err).ShouldNot(HaveOccurred(), "error: %+v, addr: %d", err, addr)
   118  
   119  		Expect(*readBuf).Should(Equal(helloWorld))
   120  	})
   121  
   122  	It("should write uint64 successfully", func() {
   123  		number := rand.Uint64()
   124  		size := uint64(unsafe.Sizeof(number))
   125  		expectBuf := make([]byte, size)
   126  		binary.LittleEndian.PutUint64(expectBuf, number)
   127  
   128  		addr, err := program.Mmap(size, 0)
   129  		Expect(err).ShouldNot(HaveOccurred(), "error: %+v", err)
   130  
   131  		err = program.WriteUint64ToAddr(addr, number)
   132  		Expect(err).ShouldNot(HaveOccurred(), "error: %+v, addr: %d", err, addr)
   133  
   134  		readBuf, err := program.ReadSlice(addr, size)
   135  		Expect(err).ShouldNot(HaveOccurred(), "error: %+v, addr: %d", err, addr)
   136  
   137  		Expect(*readBuf).Should(Equal(expectBuf))
   138  	})
   139  
   140  	It("should be able to detach and reattach", func() {
   141  		err := program.Detach()
   142  		Expect(err).ShouldNot(HaveOccurred(), "error: %+v", err)
   143  
   144  		program, err = Trace(t.Pid())
   145  		Expect(err).ShouldNot(HaveOccurred(), "error: %+v", err)
   146  	})
   147  
   148  	It("should be able to attach and detach multithread program", func() {
   149  		p := exec.Command("./bin/test/multithread_tracee")
   150  		err := p.Start()
   151  		Expect(err).ShouldNot(HaveOccurred(), "error: %+v", err)
   152  
   153  		time.Sleep(time.Millisecond)
   154  
   155  		pid := p.Process.Pid
   156  		program, err := Trace(pid)
   157  		Expect(err).ShouldNot(HaveOccurred(), "error: %+v", err)
   158  
   159  		err = program.Detach()
   160  		Expect(err).ShouldNot(HaveOccurred(), "error: %+v", err)
   161  
   162  		err = p.Process.Kill()
   163  		Expect(err).ShouldNot(HaveOccurred(), "error: %+v", err)
   164  	})
   165  })
   166