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jthreadparser_test.go
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jthreadparser_test.go
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package jthreadparser
import (
"io/ioutil"
"os"
"strings"
"testing"
)
const (
threadInfo = `"Attach Listener" daemon prio=10 tid=0x00002aaab74c5000 nid=0x2ea5 waiting on condition [0x0000000000000000]`
threadInformation = `"HDScanner" prio=10 tid=0x00002aaaebf6e800 nid=0x4367 runnable [0x00000000451cf000]
java.lang.Thread.State: RUNNABLE
at java.io.UnixFileSystem.getBooleanAttributes0(Native Method)
at java.io.UnixFileSystem.getBooleanAttributes(UnixFileSystem.java:228)
at java.io.File.isHidden(File.java:804)
Locked ownable synchronizers:
- <0x00000007500b7250> (a java.util.concurrent.locks.ReentrantLock$NonfairSync)
`
daemonThreadInformation = `"Attach Listener" #6085 daemon prio=9 os_prio=0 tid=0x00007f90d0106000 nid=0x18a1 runnable [0x0000000000000000]
java.lang.Thread.State: RUNNABLE
Locked ownable synchronizers:
- None`
threadInfoWithLocks = `"default task-23" #349 prio=5 os_prio=0 tid=0x00007f8fe400c800 nid=0x72fa waiting for monitor entry [0x00007f8f7228e000]
java.lang.Thread.State: BLOCKED (on object monitor)
at java.security.Provider.getService(Provider.java:1039)
- locked <0x0000000682e5f948> (a sun.security.provider.Sun)
at sun.security.jca.ProviderList.getService(ProviderList.java:332)
at sun.security.jca.GetInstance.getInstance(GetInstance.java:157)
at java.security.Security.getImpl(Security.java:695)
at java.security.MessageDigest.getInstance(MessageDigest.java:167)
at sun.security.rsa.RSASignature.<init>(RSASignature.java:79)
at sun.security.rsa.RSASignature$SHA512withRSA.<init>(RSASignature.java:305)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at java.security.Provider$Service.newInstance(Provider.java:1595)
at java.security.Signature$Delegate.newInstance(Signature.java:1020)
at java.security.Signature$Delegate.chooseProvider(Signature.java:1114)
- locked <0x00000007bc531138> (a java.lang.Object)
at java.security.Signature$Delegate.engineInitSign(Signature.java:1188)
at java.security.Signature.initSign(Signature.java:553)
at sun.security.ssl.HandshakeMessage$ECDH_ServerKeyExchange.<init>(HandshakeMessage.java:1031)
at sun.security.ssl.ServerHandshaker.clientHello(ServerHandshaker.java:971)
at sun.security.ssl.ServerHandshaker.processMessage(ServerHandshaker.java:228)
at sun.security.ssl.Handshaker.processLoop(Handshaker.java:1052)
at sun.security.ssl.Handshaker$1.run(Handshaker.java:992)
at sun.security.ssl.Handshaker$1.run(Handshaker.java:989)
at java.security.AccessController.doPrivileged(Native Method)
at sun.security.ssl.Handshaker$DelegatedTask.run(Handshaker.java:1467)
- locked <0x00000007bbbac500> (a sun.security.ssl.SSLEngineImpl)
at io.undertow.protocols.ssl.SslConduit$5.run(SslConduit.java:1021)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Locked ownable synchronizers:
- <0x00000006a43d5c08> (a java.util.concurrent.ThreadPoolExecutor$Worker)
`
threadDumpSample = `2017-06-02 19:02:52
Full thread dump Java HotSpot(TM) 64-Bit Server VM (20.141-b32 mixed mode):
"Attach Listener" daemon prio=10 tid=0x00002aaab74c5000 nid=0x2ea5 waiting on condition [0x0000000000000000]
java.lang.Thread.State: RUNNABLE
Locked ownable synchronizers:
- None
"RMI TCP Connection(idle)" daemon prio=10 tid=0x00002aaac69b1800 nid=0x2dec waiting on condition [0x0000000051388000]
java.lang.Thread.State: TIMED_WAITING (parking)
at sun.misc.Unsafe.park(Native Method)
- parking to wait for <0x0000000740c99708> (a java.util.concurrent.SynchronousQueue$TransferStack)
at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:196)
at java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:424)
at java.lang.Thread.run(Thread.java:682)
Locked ownable synchronizers:
- None
"RMI TCP Connection(idle)" daemon prio=10 tid=0x00002aaad5029000 nid=0x2bf8 waiting on condition [0x0000000051287000]
java.lang.Thread.State: TIMED_WAITING (parking)
at sun.misc.Unsafe.park(Native Method)
- parking to wait for <0x0000000740c99708> (a java.util.concurrent.SynchronousQueue$TransferStack)
at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:196)
at java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:424)
at java.lang.Thread.run(Thread.java:682)
Locked ownable synchronizers:
- None`
)
func TestThreadInfo(t *testing.T) {
type testCase struct {
threadInfoHeadLine string
want ThreadInfo
}
tests := []testCase{
{
threadInfoHeadLine: `"http-nio-8080-BlockPoller" #18 daemon prio=5 os_prio=0 cpu=13.17ms elapsed=116.26s tid=0x00007f4948f82000 nid=0xa35f runnable [0x00007f48a7dfe000]`,
want: ThreadInfo{
Daemon: true,
Name: `http-nio-8080-BlockPoller`,
NativeID: "0xa35f",
Priority: "5",
ID: "0x00007f4948f82000",
},
},
{
threadInfoHeadLine: `"GC Thread#6" os_prio=0 cpu=12.53ms elapsed=106.94s tid=0x00007f1914009000 nid=0xb090 runnable`,
want: ThreadInfo{
Daemon: false,
Name: `GC Thread#6`,
NativeID: "0xb090",
Priority: "",
ID: `0x00007f1914009000`,
},
},
{
threadInfoHeadLine: `"GC Thread#0" os_prio=0 cpu=25.37ms elapsed=107.25s tid=0x00007f195c06a800 nid=0xb079 runnable`,
want: ThreadInfo{
Daemon: false,
Name: `GC Thread#0`,
NativeID: `0xb079`,
Priority: "",
ID: `0x00007f195c06a800`,
},
},
{
threadInfoHeadLine: `"scheduling-1" #31 prio=5 os_prio=0 cpu=23.59ms elapsed=116.23s tid=0x00007f494899a800 nid=0xa36c waiting on condition [0x00007f48a70f0000]`,
want: ThreadInfo{
Daemon: false,
Name: `scheduling-1`,
NativeID: `0xa36c`,
ID: `0x00007f494899a800`,
Priority: "5",
},
},
}
for _, tc := range tests {
got := extractThreadInfoFromLine(tc.threadInfoHeadLine)
if got.ID != tc.want.ID {
t.Errorf("got=[%s], want=[%s]", got.ID, tc.want.ID)
}
if got.Daemon != tc.want.Daemon {
t.Errorf("got=[%t], want=[%t]", got.Daemon, tc.want.Daemon)
}
if got.Name != tc.want.Name {
t.Errorf("got=[%s], want=[%s]", got.Name, tc.want.Name)
}
if got.NativeID != tc.want.NativeID {
t.Errorf("got=[%s], want=[%s]", got.NativeID, tc.want.NativeID)
}
if got.Priority != tc.want.Priority {
t.Errorf("got=[%s], want=[%s]", got.Priority, tc.want.Priority)
}
if got.ID != tc.want.ID {
t.Errorf("got=[%s], want=[%s]", got.ID, tc.want.ID)
}
}
}
func TestExtractThreadState(t *testing.T) {
t.Parallel()
type testCase struct {
threadStateLine, want string
}
tests := []testCase{
{
threadStateLine: ` java.lang.Thread.State: BLOCKED (on object monitor)`,
want: "BLOCKED",
},
{
threadStateLine: `java.lang.Thread.State: TIMED_WAITING (on object monitor)`,
want: `TIMED_WAITING`,
},
}
for _, tc := range tests {
got := extractThreadState(tc.threadStateLine)
if got != tc.want {
t.Errorf("got=[%s], want=[%s]", got, tc.want)
}
}
}
func TestShouldIdentifyDaemonThread(t *testing.T) {
t.Parallel()
threadDump := ParseFrom(strings.NewReader(daemonThreadInformation))
if len(threadDump.Threads) != 1 {
t.Error("Error parsing single daemon thread dump")
}
if !threadDump.Threads[0].Daemon {
t.Error("Thread should be daemon")
}
}
func TestShouldTagCorrectlyDaemonThread(t *testing.T) {
t.Parallel()
type testCase struct {
threadInfo ThreadInfo
want string
}
tests := []testCase{
{
threadInfo: ThreadInfo{ID: "0x00007f90d0106000", Name: "Attach Listener", State: "RUNNABLE", Daemon: true},
want: `Thread Name: 'Attach Listener' (daemon), ID: '0x00007f90d0106000', State: 'RUNNABLE'`,
},
{
threadInfo: ThreadInfo{ID: "0x00007f90d0106000", Name: "Attach Listener", State: "RUNNABLE", Daemon: false},
want: `Thread Name: 'Attach Listener', ID: '0x00007f90d0106000', State: 'RUNNABLE'`,
},
}
for _, tc := range tests {
got := tc.threadInfo.String()
if got != tc.want {
t.Errorf("got=[%s], expected=[%s]", tc.threadInfo.String(), tc.want)
}
}
}
func TestParseFromFile(t *testing.T) {
t.Parallel()
file, err := ioutil.TempFile("", "xxxx.")
if err != nil {
t.Error(err)
}
defer os.Remove(file.Name())
err = ioutil.WriteFile(file.Name(), []byte(threadDumpSample), 0600)
if err != nil {
t.Error(err)
}
expectedNumberOfThreadsInSample := 3
threadDump, _ := ParseFromFile(file.Name())
if len(threadDump.Threads) != expectedNumberOfThreadsInSample {
t.Errorf("got=[%d], expected=[%d]", len(threadDump.Threads), expectedNumberOfThreadsInSample)
}
_, err = ParseFromFile("does_not_exist...")
if err == nil {
t.Error("there should have been an error")
}
}
func TestTopMethodsInThreads(t *testing.T) {
t.Parallel()
type testCase struct {
javaMethodName string
want int
}
threadDump, err := ParseFromFile("threaddumpsamples/tdump.sample")
if err != nil {
t.Error("Unable to parse thread dump sample file")
}
tests := []testCase{
{
javaMethodName: "java.lang.Object.wait(Native Method)",
want: 82,
},
}
for _, tc := range tests {
got := MostUsedMethods(&threadDump.Threads)
if got[tc.javaMethodName] != tc.want {
t.Errorf("Should have identified %d threads, got=%d", tc.want, got[tc.javaMethodName])
}
}
}
func TestIdenticalStrackTrace(t *testing.T) {
type testCase struct {
stacktrace string
want int
}
tests := []testCase{
{
stacktrace: `at sun.misc.Unsafe.park(Native Method)
- parking to wait for <0x0000000750785368> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
at java.util.concurrent.locks.LockSupport.park(LockSupport.java:156)
at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1987)
at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:399)
at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:957)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:917)
at java.lang.Thread.run(Thread.java:682)`,
want: 20,
},
}
threadDump, err := ParseFromFile("threaddumpsamples/tdump.sample")
if err != nil {
t.Error("Unable to parse thread dump sample file")
}
for _, tc := range tests {
got := IdenticalStackTrace(&threadDump.Threads)
if got[tc.stacktrace] != tc.want {
t.Errorf("Should have identified %d (got=%d) threads with the following stacktrace:\n%s\nEND",
tc.want, got[tc.stacktrace], tc.stacktrace)
}
}
}
func TestVerifyNumberOfThreadsInSamples(t *testing.T) {
t.Parallel()
type testCase struct {
sampleFileName string
want int
}
tests := []testCase{
{"threaddumpsamples/10.0.2.0.txt", 51},
{"threaddumpsamples/10.0.2.2.txt", 51},
{"threaddumpsamples/10.0.2.3.txt", 51},
{"threaddumpsamples/11.0.2.0.txt", 43},
{"threaddumpsamples/11.0.2.1.txt", 46},
{"threaddumpsamples/11.0.2.2.txt", 50},
{"threaddumpsamples/11.0.2.3.txt", 50},
{"threaddumpsamples/11.0.8.0-amazon.txt", 99},
{"threaddumpsamples/11.0.8.1-amazon.txt", 99},
{"threaddumpsamples/11.0.8.2-amazon.txt", 48},
{"threaddumpsamples/11.0.8.3-amazon.txt", 48},
{"threaddumpsamples/12.0.2.0.txt", 49},
{"threaddumpsamples/12.0.2.1.txt", 48},
{"threaddumpsamples/12.0.2.2.txt", 48},
{"threaddumpsamples/12.0.2.3.txt", 48},
{"threaddumpsamples/13.0.2.0.txt", 42},
{"threaddumpsamples/13.0.2.1.txt", 42},
{"threaddumpsamples/13.0.2.2.txt", 50},
{"threaddumpsamples/13.0.2.3.txt", 48},
{"threaddumpsamples/14.0.1.0.txt", 51},
{"threaddumpsamples/14.0.1.1.txt", 51},
{"threaddumpsamples/14.0.1.2.txt", 51},
{"threaddumpsamples/14.0.1.3.txt", 50},
{"threaddumpsamples/15.0.txt", 43},
{"threaddumpsamples/15.1.txt", 51},
{"threaddumpsamples/15.2.txt", 51},
{"threaddumpsamples/15.3.txt", 49},
{"threaddumpsamples/1.8-amazon.0.txt", 37},
{"threaddumpsamples/1.8-amazon.1.txt", 37},
{"threaddumpsamples/1.8-amazon.2.txt", 37},
{"threaddumpsamples/1.8-amazon.3.txt", 37},
{"threaddumpsamples/9.0.4.0.txt", 51},
{"threaddumpsamples/9.0.4.1.txt", 51},
{"threaddumpsamples/9.0.4.2.txt", 51},
{"threaddumpsamples/9.0.4.3.txt", 51},
{"threaddumpsamples/tdump2.sample", 58},
{"threaddumpsamples/tdump.jdk11.idea.txt", 56},
{"threaddumpsamples/tdump.sample", 203},
{"threaddumpsamples/x.txt", 0},
}
for _, tc := range tests {
threadDump, err := ParseFromFile(tc.sampleFileName)
if err != nil {
t.Error(err)
}
if len(threadDump.Threads) != tc.want {
t.Errorf("got=[%d], want=[%d]", len(threadDump.Threads), tc.want)
}
}
}
func TestNoThreadDumpFile(t *testing.T) {
t.Parallel()
type testCase struct {
sampleFileName string
want int
}
tests := []testCase{
{"threaddumpsamples/x.txt", 0},
}
for _, tc := range tests {
threadDump, err := ParseFromFile(tc.sampleFileName)
if err != nil {
t.Error(err)
}
if len(threadDump.Threads) != tc.want {
t.Errorf("got=[%d], want=[%d]", len(threadDump.Threads), tc.want)
}
}
}
func TestHasRunnableState(t *testing.T) {
t.Parallel()
type testCase struct {
threadHeaderLine string
want bool
}
tests := []testCase{
{
threadHeaderLine: `GC Thread#3" os_prio=0 cpu=21.13ms elapsed=146.91s tid=0x00007f1914004000 nid=0xb08d runnable `,
want: true,
},
{
threadHeaderLine: `"Finalizer" #3 daemon prio=8 os_prio=0 cpu=0.77ms elapsed=741.83s tid=0x00007f6f5c29e000 nid=0x6b90 in Object.wait() [0x00007f6f13ffe000]`,
want: false,
},
}
for _, tc := range tests {
got := hasRunnableState(tc.threadHeaderLine)
if got != tc.want {
t.Errorf("got=[%t], want=[%t]", got, tc.want)
}
}
}
func TestWaitingOnConditionState(t *testing.T) {
type testCase struct {
threadHeaderLine string
want bool
}
tests := []testCase{
{
threadHeaderLine: `"VM Periodic Task Thread" os_prio=0 tid=0x00007f74bc22d800 nid=0xd9c4 waiting on condition `,
want: true,
},
{
threadHeaderLine: `"Finalizer" #3 daemon prio=8 os_prio=0 cpu=0.77ms elapsed=741.83s tid=0x00007f6f5c29e000 nid=0x6b90 in Object.wait() [0x00007f6f13ffe000]`,
want: false,
},
}
for _, tc := range tests {
got := hasWaitingOnState(tc.threadHeaderLine)
if got != tc.want {
t.Errorf("got=[%t], want=[%t]", got, tc.want)
}
}
}
func TestHasThreadHeaderInformation(t *testing.T) {
type testCase struct {
threadHeader string
want bool
}
tests := []testCase{
{
threadHeader: `"VM Thread" os_prio=0 cpu=235.82ms elapsed=147.51s tid=0x00007f904819cef0 nid=0xbfd2 runnable`,
want: true,
},
{
threadHeader: `"http-nio-8080-exec-8" #27 daemon prio=5 os_prio=0 cpu=1.67ms elapsed=144.34s tid=0x00007f9049128ec0 nid=0xc03f waiting for monitor entry [0x00007f8faf0f0000]`,
want: true,
},
{
threadHeader: `"OPPORTUNITY"`,
want: false,
},
{
threadHeader: `Hello!`,
want: false,
},
}
for _, tc := range tests {
got := hasThreadHeaderInformation(tc.threadHeader)
if got != tc.want {
t.Errorf("got=[%t], want=[%t]", got, tc.want)
}
}
}
func TestCheckThreadInfo(t *testing.T) {
threadDump, err := ParseFromFile("threaddumpsamples/9.0.4.0-test.txt")
if err != nil {
t.Error(err)
}
const expectedNumberOfThreadsInSampleFile = 5
if len(threadDump.Threads) != expectedNumberOfThreadsInSampleFile {
t.Errorf("got=[%d] threads, expected=[%d]", len(threadDump.Threads), expectedNumberOfThreadsInSampleFile)
}
type testCase struct {
threadName string
isDaemon bool
threadID string
nativeID string
state string
}
tests := []testCase{
{
threadName: `Attach Listener`,
isDaemon: true,
threadID: `0x00007f321c001000`,
nativeID: `0x5ac6`,
state: `RUNNABLE`,
},
{
threadName: `DestroyJavaVM`,
isDaemon: false,
threadID: `0x00007f32b4012000`,
nativeID: `0x5934`,
state: `RUNNABLE`,
},
{
threadName: `scheduling-1`,
isDaemon: false,
threadID: `0x00007f32b556c000`,
nativeID: `0x596c`,
state: `TIMED_WAITING`,
},
{
threadName: `http-nio-8080-Acceptor`,
isDaemon: true,
threadID: `0x00007f32b53d7000`,
nativeID: `0x596b`,
state: `RUNNABLE`,
},
{
threadName: `http-nio-8080-ClientPoller`,
isDaemon: true,
threadID: `0x00007f32b53f1000`,
nativeID: `0x596a`,
state: `RUNNABLE`,
},
}
for i := 0; i < expectedNumberOfThreadsInSampleFile; i++ {
got := threadDump.Threads[i]
if got.Name != tests[i].threadName {
t.Errorf("got=[%s], expected=[%s]", got.Name, tests[i].threadName)
}
if got.Daemon != tests[i].isDaemon {
t.Errorf("got=[%t], want=[%t]", got.Daemon, tests[i].isDaemon)
}
if got.ID != tests[i].threadID {
t.Errorf("got=[%s], want=[%s]", got.ID, tests[i].threadID)
}
if got.NativeID != tests[i].nativeID {
t.Errorf("got=[%s], want=[%s]", got.NativeID, tests[i].nativeID)
}
if got.State != tests[i].state {
t.Errorf("got=[%s], want=[%s]", got.State, tests[i].state)
}
}
}
func TestCheckThreadInfo2(t *testing.T) {
threadDump, err := ParseFromFile("threaddumpsamples/14.0.1.1-together.txt")
if err != nil {
t.Error(err)
}
const expectedNumberOfThreadsInSampleFile = 9
if len(threadDump.Threads) != expectedNumberOfThreadsInSampleFile {
t.Errorf("got=[%d] threads, expected=[%d]", len(threadDump.Threads), expectedNumberOfThreadsInSampleFile)
}
type testCase struct {
threadName string
isDaemon bool
threadID string
nativeID string
state string
stackTrace string
}
test := []testCase{
{
threadName: `Reference Handler`,
isDaemon: true,
threadID: `0x00007f195c29c000`,
nativeID: `0xb07f`,
state: `RUNNABLE`,
stackTrace: `at java.lang.ref.Reference.waitForReferencePendingList(java.base@14.0.1/Native Method)
at java.lang.ref.Reference.processPendingReferences(java.base@14.0.1/Reference.java:241)
at java.lang.ref.Reference$ReferenceHandler.run(java.base@14.0.1/Reference.java:213)
`,
},
{
threadName: `VM Thread`,
isDaemon: false,
threadID: `0x00007f195c299000`,
nativeID: `0xb07e`,
state: `runnable`,
stackTrace: ``,
},
{
threadName: `GC Thread#7`,
isDaemon: false,
threadID: `0x00007f191400a800`,
nativeID: `0xb091`,
state: `runnable`,
stackTrace: ``,
},
{
threadName: `G1 Main Marker`,
isDaemon: false,
threadID: `0x00007f195c08c000`,
nativeID: `0xb07a`,
state: `runnable`,
stackTrace: ``,
},
{
threadName: `G1 Conc#0`,
isDaemon: false,
threadID: `0x00007f195c08d800`,
nativeID: `0xb07b`,
state: `runnable`,
stackTrace: ``,
},
{
threadName: `G1 Conc#1`,
isDaemon: false,
threadID: `0x00007f1924001000`,
nativeID: `0xb097`,
state: `runnable`,
stackTrace: ``,
},
{
threadName: `G1 Refine#0`,
isDaemon: false,
threadID: `0x00007f195c20c000`,
nativeID: `0xb07c`,
state: `runnable`,
stackTrace: ``,
},
{
threadName: `G1 Young RemSet Sampling`,
isDaemon: false,
threadID: `0x00007f195c20d800`,
nativeID: `0xb07d`,
state: `runnable`,
stackTrace: ``,
},
{
threadName: `VM Periodic Task Thread`,
isDaemon: false,
threadID: `0x00007f195c30f000`,
nativeID: `0xb087`,
state: `waiting on condition`,
stackTrace: ``,
},
}
for i := 0; i < expectedNumberOfThreadsInSampleFile; i++ {
got := threadDump.Threads[i]
if got.Name != test[i].threadName {
t.Errorf("got=[%s], want=[%s]", got.Name, test[i].threadName)
}
if got.Daemon != test[i].isDaemon {
t.Errorf("got=[%t], want=[%t]", got.Daemon, test[i].isDaemon)
}
if got.ID != test[i].threadID {
t.Errorf("got=[%s], want=[%s]", got.ID, test[i].threadID)
}
if got.NativeID != test[i].nativeID {
t.Errorf("got=[%s], want=[%s]", got.NativeID, test[i].nativeID)
}
if got.State != test[i].state {
t.Errorf("got=[%s], want=[%s]", got.State, test[i].state)
}
if got.StackTrace != test[i].stackTrace {
t.Errorf("got=[\n{%s}\n], want=[\n{%s}\n]", got.StackTrace, test[i].stackTrace)
}
}
}
func TestExtractSynchronizers(t *testing.T) {
type testCase struct {
stacktrace string
want []Synchronizer
}
tests := []testCase{
{
stacktrace: `at jdk.internal.misc.Unsafe.park(java.base@13.0.2/Native Method)
- parking to wait for <0x000000060dc25418> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
at java.util.concurrent.locks.LockSupport.park(java.base@13.0.2/LockSupport.java:194)
at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(java.base@13.0.2/AbstractQueuedSynchronizer.java:2081)
at java.util.concurrent.LinkedBlockingQueue.take(java.base@13.0.2/LinkedBlockingQueue.java:433)
at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:107)
at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:33)
at java.util.concurrent.ThreadPoolExecutor.getTask(java.base@13.0.2/ThreadPoolExecutor.java:1054)
at java.util.concurrent.ThreadPoolExecutor.runWorker(java.base@13.0.2/ThreadPoolExecutor.java:1114)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(java.base@13.0.2/ThreadPoolExecutor.java:628)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(java.base@13.0.2/Thread.java:830)
Locked ownable synchronizers:
- None`,
want: []Synchronizer{
{
ID: `0x000000060dc25418`,
ObjectName: `java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject`,
State: ParkingToWaitForState,
},
},
},
{
stacktrace: ` at sun.nio.ch.EPoll.wait(java.base@13.0.2/Native Method)
at sun.nio.ch.EPollSelectorImpl.doSelect(java.base@13.0.2/EPollSelectorImpl.java:120)
at sun.nio.ch.SelectorImpl.lockAndDoSelect(java.base@13.0.2/SelectorImpl.java:124)
- locked <0x000000060dc3e448> (a sun.nio.ch.Util$2)
- locked <0x000000060dc3e3f0> (a sun.nio.ch.EPollSelectorImpl)
at sun.nio.ch.SelectorImpl.select(java.base@13.0.2/SelectorImpl.java:136)
at org.apache.tomcat.util.net.NioEndpoint$Poller.run(NioEndpoint.java:708)
at java.lang.Thread.run(java.base@13.0.2/Thread.java:830)
`,
want: []Synchronizer{
{
ID: `0x000000060dc3e448`,
ObjectName: `sun.nio.ch.Util$2`,
State: LockedState,
},
{
ID: `0x000000060dc3e3f0`,
ObjectName: `sun.nio.ch.EPollSelectorImpl`,
State: LockedState,
},
},
},
{
stacktrace: ` at com.thdump.calls.Call5.hello(Call5.java:9)
- waiting to lock <0x000000060dc32098> (a java.lang.Class for com.thdump.calls.Call5)
at com.thdump.calls.Call4.hello(Call4.java:14)
- locked <0x000000062bac2040> (a java.lang.Class for com.thdump.calls.Call4)
at com.thdump.calls.Call3.hello(Call3.java:14)
- locked <0x000000062babf8a8> (a java.lang.Class for com.thdump.calls.Call3)
at com.thdump.calls.Call2.hello(Call2.java:14)
- locked <0x000000062babd110> (a java.lang.Class for com.thdump.calls.Call2)
at com.thdump.calls.Call1.hello(Call1.java:14)
- locked <0x000000062baba978> (a java.lang.Class for com.thdump.calls.Call1)
at com.thdump.web.SlowEndpoints.hello(SlowEndpoints.java:15)
at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(java.base@13.0.2/Native Method)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
- locked <0x000000060dc11ce0> (a org.apache.tomcat.util.net.NioEndpoint$NioSocketWrapper)
at java.util.concurrent.ThreadPoolExecutor.runWorker(java.base@13.0.2/ThreadPoolExecutor.java:1128)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(java.base@13.0.2/ThreadPoolExecutor.java:628)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(java.base@13.0.2/Thread.java:830)`,
want: []Synchronizer{
{
ID: `0x000000060dc32098`,
ObjectName: `java.lang.Class for com.thdump.calls.Call5`,
State: WaitingToLockState,
},
{
ID: `0x000000062bac2040`,
ObjectName: `java.lang.Class for com.thdump.calls.Call4`,
State: LockedState,
},
{
ID: `0x000000062babf8a8`,
ObjectName: `java.lang.Class for com.thdump.calls.Call3`,
State: LockedState,
},
{
ID: `0x000000062babd110`,
ObjectName: `java.lang.Class for com.thdump.calls.Call2`,
State: LockedState,
},
{
ID: `0x000000062baba978`,
ObjectName: `java.lang.Class for com.thdump.calls.Call1`,
State: LockedState,
},
{
ID: `0x000000060dc11ce0`,
ObjectName: `org.apache.tomcat.util.net.NioEndpoint$NioSocketWrapper`,
State: LockedState,
},
},
},
}
for _, tc := range tests {
got := extractSynchronizers(tc.stacktrace)
if len(tc.want) != len(got) {
t.Errorf("expected=[%d] synchronizers, got=[%d]", len(tc.want), len(got))
}
if !equalSyncs(got, tc.want) {
t.Errorf("got=[%q], want=[%q]", got, tc.want)
}
}
}
func TestEqual(t *testing.T) {
type testCase struct {
a, b []Synchronizer
result bool
}
tests := []testCase{
{
a: []Synchronizer{
{
ID: "a",
ObjectName: "o1",
State: LockedState,
},
{
ID: "b",
ObjectName: "o1",
State: ParkingToWaitForState,
},
},
b: []Synchronizer{
{
ID: "a",
ObjectName: "o1",
State: LockedState,
},
{
ID: "b",
ObjectName: "o1",
State: ParkingToWaitForState,
},
},
result: true,
},
{
a: []Synchronizer{},
b: []Synchronizer{
{
ID: "a",
ObjectName: "o1",
State: LockedState,
},
{
ID: "b",
ObjectName: "o2",
State: ParkingToWaitForState,
},
},
result: false,
},
{
a: []Synchronizer{},
b: []Synchronizer{},
result: true,
},
{
a: []Synchronizer{
{
ID: `x`,
ObjectName: `y`,
State: LockedState,
},
},
b: []Synchronizer{},
result: false,
},
{
a: []Synchronizer{
{
ID: `1`,
ObjectName: `2`,
State: ParkingToWaitForState,
},
},
b: []Synchronizer{
{
ID: `2`,
ObjectName: `3`,
State: WaitingOnState,
},
},
result: false,
},
}
for _, tc := range tests {
if got := equalSyncs(tc.a, tc.b); got != tc.result {
t.Errorf("%q and %q should be equal", tc.a, tc.b)
}
}
}
func TestConvertToSynchronizerState(t *testing.T) {
type testCase struct {
textState string
want SynchronizerState
}
tests := []testCase{
{
textState: `waiting on`,
want: WaitingOnState,
},
{
textState: `parking to wait for`,
want: ParkingToWaitForState,
},
{
textState: `locked`,
want: LockedState,
},
{
textState: `abc`,
want: LockedState,
},
}
for _, tc := range tests {
got := convertToSyncState(tc.textState)
if got != tc.want {
t.Errorf("got=[%q], want=[%q]", got, tc.want)
}
}
}
func TestSynchronizersByThread(t *testing.T) {
threadDump, err := ParseFromFile("threaddumpsamples/13.0.2.0.txt")
if err != nil {
t.Error(err)
}
type testCase struct {
thread ThreadInfo
want []Synchronizer
}
tests := []testCase{
{
thread: ThreadInfo{
ID: `0x00007f4948cd6000`,
Daemon: true,
Priority: "5",
NativeID: `0xa360`,
State: "BLOCKED",
Name: `http-nio-8080-exec-1`,
StackTrace: `at com.thdump.calls.Call5.hello(Call5.java:9)
- waiting to lock <0x000000060dc32098> (a java.lang.Class for com.thdump.calls.Call5)
at com.thdump.calls.Call4.hello(Call4.java:14)
- locked <0x000000062bac2040> (a java.lang.Class for com.thdump.calls.Call4)
at com.thdump.calls.Call3.hello(Call3.java:14)
- locked <0x000000062babf8a8> (a java.lang.Class for com.thdump.calls.Call3)
at com.thdump.calls.Call2.hello(Call2.java:14)
- locked <0x000000062babd110> (a java.lang.Class for com.thdump.calls.Call2)
at com.thdump.calls.Call1.hello(Call1.java:14)
- locked <0x000000062baba978> (a java.lang.Class for com.thdump.calls.Call1)
at com.thdump.web.SlowEndpoints.hello(SlowEndpoints.java:15)
at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(java.base@13.0.2/Native Method)
at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(java.base@13.0.2/NativeMethodAccessorImpl.java:62)
at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(java.base@13.0.2/DelegatingMethodAccessorImpl.java:43)