55e37e2fc8
The recent refactoring that introduced ContinueOnceContext broke this old behavior. Fixes #2978
531 lines
14 KiB
Go
531 lines
14 KiB
Go
package core
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import (
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"bytes"
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"flag"
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"fmt"
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"go/constant"
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"io/ioutil"
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"os"
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"os/exec"
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"path"
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"path/filepath"
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"reflect"
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"runtime"
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"strings"
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"testing"
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"github.com/go-delve/delve/pkg/goversion"
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"github.com/go-delve/delve/pkg/proc"
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"github.com/go-delve/delve/pkg/proc/test"
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)
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var buildMode string
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func TestMain(m *testing.M) {
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flag.StringVar(&buildMode, "test-buildmode", "", "selects build mode")
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flag.Parse()
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if buildMode != "" && buildMode != "pie" {
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fmt.Fprintf(os.Stderr, "unknown build mode %q", buildMode)
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os.Exit(1)
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}
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os.Exit(test.RunTestsWithFixtures(m))
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}
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func assertNoError(err error, t testing.TB, s string) {
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if err != nil {
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_, file, line, _ := runtime.Caller(1)
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fname := filepath.Base(file)
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t.Fatalf("failed assertion at %s:%d: %s - %s\n", fname, line, s, err)
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}
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}
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func TestSplicedReader(t *testing.T) {
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data := []byte{}
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data2 := []byte{}
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for i := 0; i < 100; i++ {
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data = append(data, byte(i))
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data2 = append(data2, byte(i+100))
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}
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type region struct {
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data []byte
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off uint64
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length uint64
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}
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tests := []struct {
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name string
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regions []region
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readAddr uint64
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readLen int
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want []byte
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}{
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{
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"Insert after",
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[]region{
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{data, 0, 1},
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{data2, 1, 1},
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},
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0,
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2,
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[]byte{0, 101},
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},
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{
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"Insert before",
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[]region{
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{data, 1, 1},
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{data2, 0, 1},
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},
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0,
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2,
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[]byte{100, 1},
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},
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{
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"Completely overwrite",
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[]region{
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{data, 1, 1},
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{data2, 0, 3},
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},
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0,
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3,
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[]byte{100, 101, 102},
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},
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{
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"Overwrite end",
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[]region{
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{data, 0, 2},
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{data2, 1, 2},
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},
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0,
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3,
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[]byte{0, 101, 102},
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},
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{
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"Overwrite start",
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[]region{
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{data, 0, 3},
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{data2, 0, 2},
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},
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0,
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3,
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[]byte{100, 101, 2},
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},
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{
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"Punch hole",
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[]region{
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{data, 0, 5},
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{data2, 1, 3},
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},
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0,
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5,
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[]byte{0, 101, 102, 103, 4},
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},
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{
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"Overlap two",
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[]region{
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{data, 10, 4},
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{data, 14, 4},
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{data2, 12, 4},
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},
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10,
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8,
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[]byte{10, 11, 112, 113, 114, 115, 16, 17},
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},
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}
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for _, test := range tests {
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t.Run(test.name, func(t *testing.T) {
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mem := &splicedMemory{}
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for _, region := range test.regions {
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r := bytes.NewReader(region.data)
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mem.Add(&offsetReaderAt{r, 0}, region.off, region.length)
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}
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got := make([]byte, test.readLen)
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n, err := mem.ReadMemory(got, test.readAddr)
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if n != test.readLen || err != nil || !reflect.DeepEqual(got, test.want) {
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t.Errorf("ReadAt = %v, %v, %v, want %v, %v, %v", n, err, got, test.readLen, nil, test.want)
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}
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})
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}
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// Test some ReadMemory errors
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mem := &splicedMemory{}
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for _, region := range []region{
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{[]byte{0xa1, 0xa2, 0xa3, 0xa4}, 0x1000, 4},
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{[]byte{0xb1, 0xb2, 0xb3, 0xb4}, 0x1004, 4},
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{[]byte{0xc1, 0xc2, 0xc3, 0xc4}, 0x1010, 4},
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} {
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r := bytes.NewReader(region.data)
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mem.Add(&offsetReaderAt{r, region.off}, region.off, region.length)
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}
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got := make([]byte, 4)
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// Read before the first mapping
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_, err := mem.ReadMemory(got, 0x900)
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if err == nil || !strings.HasPrefix(err.Error(), "error while reading spliced memory at 0x900") {
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t.Errorf("Read before the start of memory didn't fail (or wrong error): %v", err)
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}
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// Read after the last mapping
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_, err = mem.ReadMemory(got, 0x1100)
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if err == nil || (err.Error() != "offset 4352 did not match any regions") {
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t.Errorf("Read after the end of memory didn't fail (or wrong error): %v", err)
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}
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// Read at the start of the first entry
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_, err = mem.ReadMemory(got, 0x1000)
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if err != nil || !bytes.Equal(got, []byte{0xa1, 0xa2, 0xa3, 0xa4}) {
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t.Errorf("Reading at the start of the first entry: %v %#x", err, got)
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}
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// Read at the start of the second entry
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_, err = mem.ReadMemory(got, 0x1004)
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if err != nil || !bytes.Equal(got, []byte{0xb1, 0xb2, 0xb3, 0xb4}) {
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t.Errorf("Reading at the start of the second entry: %v %#x", err, got)
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}
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// Read straddling entries 1 and 2
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_, err = mem.ReadMemory(got, 0x1002)
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if err != nil || !bytes.Equal(got, []byte{0xa3, 0xa4, 0xb1, 0xb2}) {
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t.Errorf("Straddled read of the second entry: %v %#x", err, got)
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}
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// Read past the end of the second entry
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_, err = mem.ReadMemory(got, 0x1007)
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if err == nil || !strings.HasPrefix(err.Error(), "error while reading spliced memory at 0x1008") {
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t.Errorf("Read into gap: %v", err)
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}
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}
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func withCoreFile(t *testing.T, name, args string) *proc.Target {
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// This is all very fragile and won't work on hosts with non-default core patterns.
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// Might be better to check in the binary and core?
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tempDir, err := ioutil.TempDir("", "")
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if err != nil {
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t.Fatal(err)
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}
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test.PathsToRemove = append(test.PathsToRemove, tempDir)
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var buildFlags test.BuildFlags
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if buildMode == "pie" {
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buildFlags = test.BuildModePIE
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}
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fix := test.BuildFixture(name, buildFlags)
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bashCmd := fmt.Sprintf("cd %v && ulimit -c unlimited && GOTRACEBACK=crash %v %s", tempDir, fix.Path, args)
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exec.Command("bash", "-c", bashCmd).Run()
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cores, err := filepath.Glob(path.Join(tempDir, "core*"))
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switch {
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case err != nil || len(cores) > 1:
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t.Fatalf("Got %v, wanted one file named core* in %v", cores, tempDir)
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case len(cores) == 0:
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t.Skipf("core file was not produced, could not run test")
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return nil
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}
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corePath := cores[0]
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p, err := OpenCore(corePath, fix.Path, []string{})
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if err != nil {
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t.Errorf("OpenCore(%q) failed: %v", corePath, err)
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pat, err := ioutil.ReadFile("/proc/sys/kernel/core_pattern")
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t.Errorf("read core_pattern: %q, %v", pat, err)
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apport, err := ioutil.ReadFile("/var/log/apport.log")
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t.Errorf("read apport log: %q, %v", apport, err)
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t.Fatalf("previous errors")
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}
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return p
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}
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func logRegisters(t *testing.T, regs proc.Registers, arch *proc.Arch) {
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dregs := arch.RegistersToDwarfRegisters(0, regs)
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dregs.Reg(^uint64(0))
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for i := 0; i < dregs.CurrentSize(); i++ {
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reg := dregs.Reg(uint64(i))
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if reg == nil {
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continue
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}
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name, _, value := arch.DwarfRegisterToString(i, reg)
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t.Logf("%s = %s", name, value)
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}
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}
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func TestCore(t *testing.T) {
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if runtime.GOOS != "linux" || runtime.GOARCH != "amd64" {
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return
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}
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if runtime.GOOS == "linux" && os.Getenv("CI") == "true" && buildMode == "pie" {
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t.Skip("disabled on linux, Github Actions, with PIE buildmode")
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}
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p := withCoreFile(t, "panic", "")
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recorded, _ := p.Recorded()
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if !recorded {
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t.Fatalf("expecting recorded to be true")
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}
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gs, _, err := proc.GoroutinesInfo(p, 0, 0)
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if err != nil || len(gs) == 0 {
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t.Fatalf("GoroutinesInfo() = %v, %v; wanted at least one goroutine", gs, err)
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}
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var panicking *proc.G
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var panickingStack []proc.Stackframe
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for _, g := range gs {
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t.Logf("Goroutine %d", g.ID)
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stack, err := g.Stacktrace(10, 0)
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if err != nil {
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t.Errorf("Stacktrace() on goroutine %v = %v", g, err)
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}
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for _, frame := range stack {
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fnname := ""
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if frame.Call.Fn != nil {
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fnname = frame.Call.Fn.Name
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}
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t.Logf("\tframe %s:%d in %s %#x (systemstack: %v)", frame.Call.File, frame.Call.Line, fnname, frame.Call.PC, frame.SystemStack)
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if frame.Current.Fn != nil && strings.Contains(frame.Current.Fn.Name, "panic") {
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panicking = g
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panickingStack = stack
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}
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}
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}
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if panicking == nil {
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t.Fatalf("Didn't find a call to panic in goroutine stacks: %v", gs)
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}
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var mainFrame *proc.Stackframe
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// Walk backward, because the current function seems to be main.main
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// in the actual call to panic().
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for i := len(panickingStack) - 1; i >= 0; i-- {
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if panickingStack[i].Current.Fn != nil && panickingStack[i].Current.Fn.Name == "main.main" {
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mainFrame = &panickingStack[i]
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}
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}
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if mainFrame == nil {
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t.Fatalf("Couldn't find main in stack %v", panickingStack)
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}
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msg, err := proc.FrameToScope(p, p.Memory(), nil, *mainFrame).EvalExpression("msg", proc.LoadConfig{MaxStringLen: 64})
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if err != nil {
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t.Fatalf("Couldn't EvalVariable(msg, ...): %v", err)
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}
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if constant.StringVal(msg.Value) != "BOOM!" {
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t.Errorf("main.msg = %q, want %q", msg.Value, "BOOM!")
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}
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regs, err := p.CurrentThread().Registers()
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if err != nil {
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t.Fatalf("Couldn't get current thread registers: %v", err)
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}
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logRegisters(t, regs, p.BinInfo().Arch)
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}
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func TestCoreFpRegisters(t *testing.T) {
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if runtime.GOOS != "linux" || runtime.GOARCH != "amd64" {
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return
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}
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// in go1.10 the crash is executed on a different thread and registers are
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// no longer available in the core dump.
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if ver, _ := goversion.Parse(runtime.Version()); ver.Major < 0 || ver.AfterOrEqual(goversion.GoVersion{Major: 1, Minor: 10, Rev: -1}) {
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t.Skip("not supported in go1.10 and later")
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}
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p := withCoreFile(t, "fputest/", "panic")
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gs, _, err := proc.GoroutinesInfo(p, 0, 0)
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if err != nil || len(gs) == 0 {
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t.Fatalf("GoroutinesInfo() = %v, %v; wanted at least one goroutine", gs, err)
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}
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var regs proc.Registers
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for _, thread := range p.ThreadList() {
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frames, err := proc.ThreadStacktrace(thread, 10)
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if err != nil {
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t.Errorf("ThreadStacktrace for %x = %v", thread.ThreadID(), err)
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continue
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}
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for i := range frames {
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if frames[i].Current.Fn == nil {
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continue
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}
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if frames[i].Current.Fn.Name == "main.main" {
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regs, err = thread.Registers()
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if err != nil {
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t.Fatalf("Could not get registers for thread %x, %v", thread.ThreadID(), err)
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}
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break
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}
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}
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if regs != nil {
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break
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}
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}
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regtests := []struct{ name, value string }{
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{"ST(0)", "0x3fffe666660000000000"},
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{"ST(1)", "0x3fffd9999a0000000000"},
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{"ST(2)", "0x3fffcccccd0000000000"},
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{"ST(3)", "0x3fffc000000000000000"},
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{"ST(4)", "0x3fffb333333333333000"},
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{"ST(5)", "0x3fffa666666666666800"},
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{"ST(6)", "0x3fff9999999999999800"},
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{"ST(7)", "0x3fff8cccccccccccd000"},
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// Unlike TestClientServer_FpRegisters in service/test/integration2_test
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// we can not test the value of XMM0, it probably has been reused by
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// something between the panic and the time we get the core dump.
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{"XMM9", "0x3ff66666666666663ff4cccccccccccd"},
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{"XMM10", "0x3fe666663fd9999a3fcccccd3fc00000"},
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{"XMM3", "0x3ff199999999999a3ff3333333333333"},
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{"XMM4", "0x3ff4cccccccccccd3ff6666666666666"},
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{"XMM5", "0x3fcccccd3fc000003fe666663fd9999a"},
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{"XMM6", "0x4004cccccccccccc4003333333333334"},
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{"XMM7", "0x40026666666666664002666666666666"},
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{"XMM8", "0x4059999a404ccccd4059999a404ccccd"},
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}
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arch := p.BinInfo().Arch
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logRegisters(t, regs, arch)
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dregs := arch.RegistersToDwarfRegisters(0, regs)
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for _, regtest := range regtests {
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found := false
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dregs.Reg(^uint64(0))
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for i := 0; i < dregs.CurrentSize(); i++ {
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reg := dregs.Reg(uint64(i))
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regname, _, regval := arch.DwarfRegisterToString(i, reg)
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if reg != nil && regname == regtest.name {
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found = true
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if !strings.HasPrefix(regval, regtest.value) {
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t.Fatalf("register %s expected %q got %q", regname, regtest.value, regval)
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}
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}
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}
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if !found {
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t.Fatalf("register %s not found: %v", regtest.name, regs)
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}
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}
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}
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func TestCoreWithEmptyString(t *testing.T) {
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if runtime.GOOS != "linux" || runtime.GOARCH != "amd64" {
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return
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}
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if runtime.GOOS == "linux" && os.Getenv("CI") == "true" && buildMode == "pie" {
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t.Skip("disabled on linux, Github Actions, with PIE buildmode")
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}
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p := withCoreFile(t, "coreemptystring", "")
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gs, _, err := proc.GoroutinesInfo(p, 0, 0)
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assertNoError(err, t, "GoroutinesInfo")
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var mainFrame *proc.Stackframe
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mainSearch:
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for _, g := range gs {
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stack, err := g.Stacktrace(10, 0)
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assertNoError(err, t, "Stacktrace()")
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for _, frame := range stack {
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if frame.Current.Fn != nil && frame.Current.Fn.Name == "main.main" {
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mainFrame = &frame
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break mainSearch
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}
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}
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}
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if mainFrame == nil {
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t.Fatal("could not find main.main frame")
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}
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scope := proc.FrameToScope(p, p.Memory(), nil, *mainFrame)
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loadConfig := proc.LoadConfig{FollowPointers: true, MaxVariableRecurse: 1, MaxStringLen: 64, MaxArrayValues: 64, MaxStructFields: -1}
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v1, err := scope.EvalExpression("t", loadConfig)
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assertNoError(err, t, "EvalVariable(t)")
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assertNoError(v1.Unreadable, t, "unreadable variable 't'")
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t.Logf("t = %#v\n", v1)
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v2, err := scope.EvalExpression("s", loadConfig)
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assertNoError(err, t, "EvalVariable(s)")
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assertNoError(v2.Unreadable, t, "unreadable variable 's'")
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t.Logf("s = %#v\n", v2)
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}
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func TestMinidump(t *testing.T) {
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if runtime.GOOS != "windows" {
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t.Skip("minidumps can only be produced on windows")
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}
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var buildFlags test.BuildFlags
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if buildMode == "pie" {
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buildFlags = test.BuildModePIE
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}
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fix := test.BuildFixture("sleep", buildFlags)
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mdmpPath := procdump(t, fix.Path)
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p, err := OpenCore(mdmpPath, fix.Path, []string{})
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if err != nil {
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t.Fatalf("OpenCore: %v", err)
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}
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gs, _, err := proc.GoroutinesInfo(p, 0, 0)
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if err != nil || len(gs) == 0 {
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t.Fatalf("GoroutinesInfo() = %v, %v; wanted at least one goroutine", gs, err)
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}
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t.Logf("%d goroutines", len(gs))
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foundMain, foundTime := false, false
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for _, g := range gs {
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stack, err := g.Stacktrace(10, 0)
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if err != nil {
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t.Errorf("Stacktrace() on goroutine %v = %v", g, err)
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}
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t.Logf("goroutine %d", g.ID)
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for _, frame := range stack {
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name := "?"
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if frame.Current.Fn != nil {
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name = frame.Current.Fn.Name
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}
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t.Logf("\t%s:%d in %s %#x", frame.Current.File, frame.Current.Line, name, frame.Current.PC)
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if frame.Current.Fn == nil {
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continue
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}
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switch frame.Current.Fn.Name {
|
|
case "main.main":
|
|
foundMain = true
|
|
case "time.Sleep":
|
|
foundTime = true
|
|
}
|
|
}
|
|
if foundMain != foundTime {
|
|
t.Errorf("found main.main but no time.Sleep (or viceversa) %v %v", foundMain, foundTime)
|
|
}
|
|
}
|
|
if !foundMain {
|
|
t.Fatalf("could not find main goroutine")
|
|
}
|
|
}
|
|
|
|
func procdump(t *testing.T, exePath string) string {
|
|
exeDir := filepath.Dir(exePath)
|
|
cmd := exec.Command("procdump64", "-accepteula", "-ma", "-n", "1", "-s", "3", "-x", exeDir, exePath, "quit")
|
|
out, err := cmd.CombinedOutput() // procdump exits with non-zero status on success, so we have to ignore the error here
|
|
if !strings.Contains(string(out), "Dump count reached.") {
|
|
t.Fatalf("possible error running procdump64, output: %q, error: %v", string(out), err)
|
|
}
|
|
|
|
dh, err := os.Open(exeDir)
|
|
if err != nil {
|
|
t.Fatalf("could not open executable file directory %q: %v", exeDir, err)
|
|
}
|
|
defer dh.Close()
|
|
fis, err := dh.Readdir(-1)
|
|
if err != nil {
|
|
t.Fatalf("could not read executable file directory %q: %v", exeDir, err)
|
|
}
|
|
t.Logf("looking for dump file")
|
|
exeName := filepath.Base(exePath)
|
|
for _, fi := range fis {
|
|
name := fi.Name()
|
|
t.Logf("\t%s", name)
|
|
if strings.HasPrefix(name, exeName) && strings.HasSuffix(name, ".dmp") {
|
|
mdmpPath := filepath.Join(exeDir, name)
|
|
test.PathsToRemove = append(test.PathsToRemove, mdmpPath)
|
|
return mdmpPath
|
|
}
|
|
}
|
|
|
|
t.Fatalf("could not find dump file")
|
|
return ""
|
|
}
|