RFR(M): 8081674: EmptyStackException at startup if running with extended or unsupported charset

Xueming Shen xueming.shen at oracle.com
Tue Jun 9 18:07:22 UTC 2015


On 06/09/2015 11:03 AM, Mandy Chung wrote:
> Does my patch work fine on 8u?    If it works fine, I prefer to get that simple fix in 8u and take the time to have a better fix in 9 (jdk9 is still under development and I have assumed that it's not a show stopper to you.  Let me know if it blocks you).
>
> A question to Sherman - do we have adequate tests to verify the move of System.loadLibrary("zip") from system initialization to ZipFile initialization for 8u?

I don't think we have "adequate" tests for the "zip" initialization. It had tricky problems in the past.
I would assume it might be safe to move it from the System to the zip package for 9 as we no longer
have those jar files to load the classes, but that probably not the case for 8u, yet(?).

-Sherman

>
> Mandy
>
> On 06/09/2015 10:09 AM, Volker Simonis wrote:
>> Hi Mandy,
>>
>> thanks for looking into this.
>> Uunfortunately your fix only helps to fix "java -version" :(
>>
>> Running even a minimal HelloWorld will still fail with the following
>> stack trace which is still caused by the same EmptyStackException:
>>
>> Error: A JNI error has occurred, please check your installation and try again
>> Exception in thread "main" java.lang.ExceptionInInitializerError
>>      at sun.misc.Unsafe.ensureClassInitialized(Native Method)
>>      at sun.misc.SharedSecrets.getJavaUtilZipFileAccess(SharedSecrets.java:158)
>>      at sun.misc.URLClassPath$JarLoader.<clinit>(URLClassPath.java:765)
>>      at sun.misc.URLClassPath$3.run(URLClassPath.java:530)
>>      at sun.misc.URLClassPath$3.run(URLClassPath.java:520)
>>      at java.security.AccessController.doPrivileged(Native Method)
>>      at sun.misc.URLClassPath.getLoader(URLClassPath.java:519)
>>      at sun.misc.URLClassPath.getLoader(URLClassPath.java:492)
>>      at sun.misc.URLClassPath.getNextLoader(URLClassPath.java:457)
>>      at sun.misc.URLClassPath.access$100(URLClassPath.java:64)
>>      at sun.misc.URLClassPath$1.next(URLClassPath.java:239)
>>      at sun.misc.URLClassPath$1.hasMoreElements(URLClassPath.java:250)
>>      at java.net.URLClassLoader$3$1.run(URLClassLoader.java:601)
>>      at java.net.URLClassLoader$3$1.run(URLClassLoader.java:599)
>>      at java.security.AccessController.doPrivileged(Native Method)
>>      at java.net.URLClassLoader$3.next(URLClassLoader.java:598)
>>      at java.net.URLClassLoader$3.hasMoreElements(URLClassLoader.java:623)
>>      at sun.misc.CompoundEnumeration.next(CompoundEnumeration.java:45)
>>      at sun.misc.CompoundEnumeration.hasMoreElements(CompoundEnumeration.java:54)
>>      at sun.misc.CompoundEnumeration.next(CompoundEnumeration.java:45)
>>      at sun.misc.CompoundEnumeration.hasMoreElements(CompoundEnumeration.java:54)
>>      at java.util.ServiceLoader$LazyIterator.hasNextService(ServiceLoader.java:354)
>>      at java.util.ServiceLoader$LazyIterator.hasNext(ServiceLoader.java:393)
>>      at java.util.ServiceLoader$1.hasNext(ServiceLoader.java:474)
>>      at java.nio.charset.Charset$1.getNext(Charset.java:350)
>>      at java.nio.charset.Charset$1.hasNext(Charset.java:365)
>>      at java.nio.charset.Charset$2.run(Charset.java:410)
>>      at java.nio.charset.Charset$2.run(Charset.java:407)
>>      at java.security.AccessController.doPrivileged(Native Method)
>>      at java.nio.charset.Charset.lookupViaProviders(Charset.java:406)
>>      at java.nio.charset.Charset.lookup2(Charset.java:477)
>>      at java.nio.charset.Charset.lookup(Charset.java:464)
>>      at java.nio.charset.Charset.isSupported(Charset.java:505)
>>      at sun.launcher.LauncherHelper.makePlatformString(LauncherHelper.java:580)
>> Caused by: java.util.EmptyStackException
>>      at java.util.Stack.peek(Stack.java:102)
>>      at java.lang.ClassLoader$NativeLibrary.getFromClass(ClassLoader.java:1759)
>>      at java.lang.ClassLoader$NativeLibrary.findBuiltinLib(Native Method)
>>      at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1870)
>>      at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1843)
>>      at java.lang.Runtime.loadLibrary0(Runtime.java:870)
>>      at java.lang.System.loadLibrary(System.java:1122)
>>      at java.util.zip.ZipFile.<clinit>(ZipFile.java:86)
>>      ... 34 more
>>
>> It's obvious that the way jni_FindClass is looking for the class
>> context by calling the NativeLibrary::getFromClass method is hacky but
>> I think that the proposed fix is the quite simple and non-intrusive.
>> And we probably don't want a complete rework of this code for 8
>> anyway. So why not fix it the proposed way in 8 and 9 for now? That
>> will still leave us time to come up with a better clean-up at least
>> for 9.
>>
>> What do you think?
>>
>> Regards,
>> Volker
>>
>> On Tue, Jun 9, 2015 at 1:35 AM, Mandy Chung <mandy.chung at oracle.com> wrote:
>>> Hi Volker,
>>>
>>> Your patch reminds me the question I have about loading zip library.
>>>
>>> In JDK 9 (and earlier release), zip library is loaded by the VM during
>>> startup (see ClassLoader::load_zip_library).  I think loadLibrary("zip") is
>>> no longer needed to be called from System::initializeSystemClass method and
>>> instead it can be loaded by java.util.zip.ZipFile static initializer.
>>>
>>> Do you mind to try the patch (below)?  That may be a simpler fix.
>>>
>>> I never like the way jni_FindClass to look for the class context by calling
>>> the NativeLibrary::getFromClass method.  I will have to look deeper other
>>> alternative to clean that up.  If taking out loadLibrary("zip") resolves
>>> your issue, this will give us time to come up with a better clean-up in the
>>> future.
>>>
>>> Mandy
>>> [1] https://bugs.openjdk.java.net/browse/JDK-4429040
>>>
>>> diff --git a/src/share/classes/java/lang/System.java
>>> b/src/share/classes/java/lang/System.java
>>> --- a/src/share/classes/java/lang/System.java
>>> +++ b/src/share/classes/java/lang/System.java
>>> @@ -1192,10 +1192,6 @@
>>>           setOut0(newPrintStream(fdOut,
>>> props.getProperty("sun.stdout.encoding")));
>>>           setErr0(newPrintStream(fdErr,
>>> props.getProperty("sun.stderr.encoding")));
>>>
>>> -        // Load the zip library now in order to keep java.util.zip.ZipFile
>>> -        // from trying to use itself to load this library later.
>>> -        loadLibrary("zip");
>>> -
>>>           // Setup Java signal handlers for HUP, TERM, and INT (where
>>> available).
>>>           Terminator.setup();
>>>
>>> diff --git a/src/share/classes/java/util/zip/ZipFile.java
>>> b/src/share/classes/java/util/zip/ZipFile.java
>>> --- a/src/share/classes/java/util/zip/ZipFile.java
>>> +++ b/src/share/classes/java/util/zip/ZipFile.java
>>> @@ -83,6 +83,7 @@
>>>
>>>       static {
>>>           /* Zip library is loaded from System.initializeSystemClass */
>>> +        System.loadLibrary("zip");
>>>           initIDs();
>>>
>>>       }
>>>
>>>
>>>
>>> On 06/08/2015 07:23 AM, Volker Simonis wrote:
>>>> Hi,
>>>>
>>>> can I please get a review at least for the part of this fix which is
>>>> common for jdk8 and jdk9. It's only a few lines in
>>>> src/share/vm/prims/jni.cpp for the hotspot repository and one line
>>>> src/java.base/share/classes/java/lang/ClassLoader.java for the jdk
>>>> repository.
>>>>
>>>> Thanks,
>>>> Volker
>>>>
>>>>
>>>> On Tue, Jun 2, 2015 at 6:12 PM, Volker Simonis <volker.simonis at gmail.com>
>>>> wrote:
>>>>> Hi,
>>>>>
>>>>> can I please have review (and a sponsor) for these changes:
>>>>>
>>>>> https://bugs.openjdk.java.net/browse/JDK-8081674
>>>>> http://cr.openjdk.java.net/~simonis/webrevs/2015/8081674.jdk
>>>>> http://cr.openjdk.java.net/~simonis/webrevs/2015/8081674.hs
>>>>>
>>>>> Please notice that the fix requires synchronous changes in the jdk and
>>>>> the
>>>>> hotspot forest.
>>>>>
>>>>> The changes themselves are by far not that big as this explanation but I
>>>>> found the problem to be quite intricate so I tried to explain it as good
>>>>> as
>>>>> I could. I'd suggest to read the HTML-formatted explanation in the webrev
>>>>> although the content is equal to the one in this mail:
>>>>>
>>>>> Using an unsupported character encoding (e.g. vi_VN.TCVN on Linux)
>>>>> results
>>>>> in an immediate VM failure with jdk 8 and 9:
>>>>>
>>>>> export LANG=vi_VN.TCVN
>>>>> java -version
>>>>> Error occurred during initialization of VM
>>>>> java.util.EmptyStackException
>>>>>          at java.util.Stack.peek(Stack.java:102)
>>>>>          at
>>>>> java.lang.ClassLoader$NativeLibrary.getFromClass(ClassLoader.java:1751)
>>>>>          at java.lang.ClassLoader$NativeLibrary.findBuiltinLib(Native
>>>>> Method)
>>>>>          at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1862)
>>>>>          at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1835)
>>>>>          at java.lang.Runtime.loadLibrary0(Runtime.java:870)
>>>>>          at java.lang.System.loadLibrary(System.java:1119)
>>>>>          at java.lang.System.initializeSystemClass(System.java:1194)
>>>>>
>>>>> This is a consequence of "8005716: Enhance JNI specification to allow
>>>>> support of static JNI libraries in Embedded JREs".
>>>>>
>>>>> With jdk 9 we get this error even if we're running with a supported
>>>>> charset
>>>>> which is in the ExtendedCharsets (as opposed to being in the
>>>>> StandardCharsets) class which is a consequence of delegating the loading
>>>>> of
>>>>> the ExtendedCharsets class to the ServiceLoader in jdk 9.
>>>>>
>>>>> export LANG=eo.iso-8859-3
>>>>> output-jdk9/images/jdk/bin/java -version
>>>>> Error occurred during initialization of VM
>>>>> java.util.EmptyStackException
>>>>>          at java.util.Stack.peek(Stack.java:102)
>>>>>          at
>>>>> java.lang.ClassLoader$NativeLibrary.getFromClass(ClassLoader.java:1737)
>>>>>          at java.lang.ClassLoader$NativeLibrary.findBuiltinLib(Native
>>>>> Method)
>>>>>          at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1866)
>>>>>          at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1840)
>>>>>          at java.lang.Runtime.loadLibrary0(Runtime.java:874)
>>>>>          at java.lang.System.loadLibrary(System.java:1111)
>>>>>          at java.lang.System.initializeSystemClass(System.java:1186)
>>>>>
>>>>> Here's why the exception happens for an unsupported charset (see the
>>>>> mixed
>>>>> stack trace below for the full details):
>>>>>
>>>>> java.lang.System.loadLibrary() wants to load libzip.so. It calls
>>>>> java.lang.Runtime.loadLibrary0() which at the very beginning calls the
>>>>> native method ClassLoader$NativeLibrary.findBuiltinLib() which checks if
>>>>> the
>>>>> corresponding library is already statically linked into the VM
>>>>> (introduced
>>>>> by 8005716).
>>>>> Java_java_lang_ClassLoader_00024NativeLibrary_findBuiltinLib(),
>>>>> the native implementation of findBuiltinLib() in Classloader.c calls
>>>>> GetStringPlatformChars() to convert the library name into the native
>>>>> platform encoding. GetStringPlatformChars() calls the helper function
>>>>> jnuEncodingSupported() to check if the platform encoding which is stored
>>>>> in
>>>>> the property "sun.jnu.encoding" is supported by Java.
>>>>> jnuEncodingSupported()
>>>>> is implemented as follows:
>>>>>
>>>>> static jboolean isJNUEncodingSupported = JNI_FALSE;
>>>>> static jboolean jnuEncodingSupported(JNIEnv *env) {
>>>>>       jboolean exe;
>>>>>       if (isJNUEncodingSupported == JNI_TRUE) {
>>>>>           return JNI_TRUE;
>>>>>       }
>>>>>       isJNUEncodingSupported = (jboolean) JNU_CallStaticMethodByName (
>>>>>                                       env, &exe,
>>>>>                                       "java/nio/charset/Charset",
>>>>>                                       "isSupported",
>>>>>                                       "(Ljava/lang/String;)Z",
>>>>>                                       jnuEncoding).z;
>>>>>       return isJNUEncodingSupported;
>>>>> }
>>>>>
>>>>> Once the function finds that the platform encoding is supported (by
>>>>> calling
>>>>> java.nio.charset.Charset.isSupported()) it caches this value and always
>>>>> returns it on following calls. However if the platform encoding is not
>>>>> supported, it ALWAYS calls java.nio.charset.Charset.isSupported() an
>>>>> every
>>>>> subsequent invocation.
>>>>>
>>>>> In order to call the Java method Charset.isSupported() (in
>>>>> JNU_CallStaticMethodByName() in file jni_util.c), we have to call
>>>>> jni_FindClass() to convert the symbolic class name
>>>>> "java.nio.charset.Charset" into a class reference.
>>>>>
>>>>> But unfortunately, jni_FindClass() (from jni.cpp in libjvm.so) has a
>>>>> special
>>>>> handling if called from java.lang.ClassLoader$NativeLibrary to ensure
>>>>> that
>>>>> JNI_OnLoad/JNI_OnUnload are executed in the correct class context:
>>>>>
>>>>>     instanceKlassHandle k (THREAD, thread->security_get_caller_class(0));
>>>>>     if (k.not_null()) {
>>>>>       loader = Handle(THREAD, k->class_loader());
>>>>>       // Special handling to make sure JNI_OnLoad and JNI_OnUnload are
>>>>> executed
>>>>>       // in the correct class context.
>>>>>       if (loader.is_null() &&
>>>>>           k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) {
>>>>>         JavaValue result(T_OBJECT);
>>>>>         JavaCalls::call_static(&result, k,
>>>>>                                         vmSymbols::getFromClass_name(),
>>>>>                                         vmSymbols::void_class_signature(),
>>>>>                                         thread);
>>>>>         if (HAS_PENDING_EXCEPTION) {
>>>>>           Handle ex(thread, thread->pending_exception());
>>>>>           CLEAR_PENDING_EXCEPTION;
>>>>>           THROW_HANDLE_0(ex);
>>>>>         }
>>>>>
>>>>> So if that's the case and jni_FindClass() was reallycalled from
>>>>> ClassLoader$NativeLibrary, then jni_FindClass() calles
>>>>> ClassLoader$NativeLibrary().getFromClass() to find out the corresponding
>>>>> context class which is supposed to be saved there in a field of type
>>>>> java.util.Stack named "nativeLibraryContext":
>>>>>
>>>>> // Invoked in the VM to determine the context class in
>>>>> // JNI_Load/JNI_Unload
>>>>> static Class<?> getFromClass() {
>>>>>       return ClassLoader.nativeLibraryContext.peek().fromClass;
>>>>> }
>>>>>
>>>>> Unfortunately, "nativeLibraryContext" doesn't contain any entry at this
>>>>> point and the invocation of Stack.peek() will throw the exception shown
>>>>> before. In general, the "nativeLibraryContext" stack will be filled later
>>>>> on
>>>>> in Runtime.loadLibrary0() like this:
>>>>>
>>>>> NativeLibrary lib = new NativeLibrary(fromClass, name, isBuiltin);
>>>>> nativeLibraryContext.push(lib);
>>>>> try {
>>>>>       lib.load(name, isBuiltin);
>>>>> } finally {
>>>>>       nativeLibraryContext.pop();
>>>>> }
>>>>>
>>>>> such that it always contains at least one element later when
>>>>> jni_FindClass()
>>>>> will be invoked.
>>>>>
>>>>> So in summary, the problem is that the implementors of 8005716 didn't
>>>>> took
>>>>> into account that calling ClassLoader$NativeLibrary.findBuiltinLib() may
>>>>> trigger a call to jni_FindClass() if we are running on a system with an
>>>>> unsupported character encoding.
>>>>>
>>>>> I'd suggest the following fix for this problem:
>>>>>
>>>>> Change ClassLoader$NativeLibrary().getFromClass() to return null if the
>>>>> stack is empty instead of throwing an exception:
>>>>>
>>>>> static Class<?> getFromClass() {
>>>>>       return ClassLoader.nativeLibraryContext.empty() ?
>>>>>           null : ClassLoader.nativeLibraryContext.peek().fromClass;
>>>>> }
>>>>>
>>>>> Unfortunately this also requires a HotSpot change in jni_FindClass() in
>>>>> order to properly handle the new 'null' return value:
>>>>>
>>>>>     if (k.not_null()) {
>>>>>       loader = Handle(THREAD, k->class_loader());
>>>>>       // Special handling to make sure JNI_OnLoad and JNI_OnUnload are
>>>>> executed
>>>>>       // in the correct class context.
>>>>>       if (loader.is_null() &&
>>>>>           k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) {
>>>>>         JavaValue result(T_OBJECT);
>>>>>         JavaCalls::call_static(&result, k,
>>>>>                                         vmSymbols::getFromClass_name(),
>>>>>                                         vmSymbols::void_class_signature(),
>>>>>                                         thread);
>>>>>         if (HAS_PENDING_EXCEPTION) {
>>>>>           Handle ex(thread, thread->pending_exception());
>>>>>           CLEAR_PENDING_EXCEPTION;
>>>>>           THROW_HANDLE_0(ex);
>>>>>         }
>>>>>         oop mirror = (oop) result.get_jobject();
>>>>>         if (oopDesc::is_null(mirror)) {
>>>>>           loader = Handle(THREAD, SystemDictionary::java_system_loader());
>>>>>         } else {
>>>>>           loader = Handle(THREAD,
>>>>>
>>>>> InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->class_loader());
>>>>>           protection_domain = Handle(THREAD,
>>>>>
>>>>>
>>>>> InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->protection_domain());
>>>>>         }
>>>>>       }
>>>>>     } else {
>>>>>       // We call ClassLoader.getSystemClassLoader to obtain the system
>>>>> class
>>>>> loader.
>>>>>       loader = Handle(THREAD, SystemDictionary::java_system_loader());
>>>>>     }
>>>>>
>>>>> These changes are sufficient to solve the problem in Java 8.
>>>>> Unfortunately,
>>>>> that's still not enough in Java 9 because there the loading of the
>>>>> extended
>>>>> charsets has been delegated to ServiceLoader. But ServiceLoader calls
>>>>> ClassLoader.getBootstrapResources() which calls
>>>>> sun.misc.Launcher.getBootstrapClassPath(). This leads to another problem
>>>>> during class initialization of sun.misc.Launcher if running on an
>>>>> unsupported locale.
>>>>>
>>>>> The first thing done in sun.misc.Launcher.<clinit> is the initialisation
>>>>> of
>>>>> the bootstrap URLClassPath in the Launcher. However this initialisation
>>>>> will
>>>>> eventually call Charset.isSupported() and if we are running on an
>>>>> unsupported locale this will inevitably end in another recursive call to
>>>>> ServiceLoader. But as explained below, ServiceLoader will query the
>>>>> Launcher's bootstrap URLClassPath which will be still uninitialized at
>>>>> that
>>>>> point.
>>>>>
>>>>> So we'll have to additionally guard guard against this situation on JDK 9
>>>>> like this:
>>>>>
>>>>> private static Charset lookupExtendedCharset(String charsetName) {
>>>>>       if (!sun.misc.VM.isBooted() ||             // see
>>>>> lookupViaProviders()
>>>>>           sun.misc.Launcher.getBootstrapClassPath() == null)
>>>>>           return null;
>>>>>
>>>>> This fixes the crashes, but still at the price of not having the extended
>>>>> charsets available during initialization until
>>>>> Launcher.getBootstrapClassPath is set up properly. This may be still a
>>>>> problem if the jdk is installed in a directory which contains characters
>>>>> specific to an extended encoding or if we have such characters in the
>>>>> command line arguments.
>>>>>
>>>>> Thank you and best regards,
>>>>> Volker
>>>>>
>>>>>
>>>>> Mixed stack trace of the initial EmptyStackException for unsupported
>>>>> charsets described before:
>>>>>
>>>>> Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native
>>>>> code)
>>>>> j  java.util.Stack.peek()Ljava/lang/Object;+1
>>>>> j  java.lang.ClassLoader$NativeLibrary.getFromClass()Ljava/lang/Class;+3
>>>>> v  ~StubRoutines::call_stub
>>>>> V  [libjvm.so+0x9d279a]  JavaCalls::call_helper(JavaValue*,
>>>>> methodHandle*,
>>>>> JavaCallArguments*, Thread*)+0x6b4
>>>>> V  [libjvm.so+0xcad591]  os::os_exception_wrapper(void (*)(JavaValue*,
>>>>> methodHandle*, JavaCallArguments*, Thread*), JavaValue*, methodHandle*,
>>>>> JavaCallArguments*, Thread*)+0x45
>>>>> V  [libjvm.so+0x9d20cf]  JavaCalls::call(JavaValue*, methodHandle,
>>>>> JavaCallArguments*, Thread*)+0x8b
>>>>> V  [libjvm.so+0x9d1d3b]  JavaCalls::call_static(JavaValue*, KlassHandle,
>>>>> Symbol*, Symbol*, JavaCallArguments*, Thread*)+0x139
>>>>> V  [libjvm.so+0x9d1e3f]  JavaCalls::call_static(JavaValue*, KlassHandle,
>>>>> Symbol*, Symbol*, Thread*)+0x9d
>>>>> V  [libjvm.so+0x9e6588]  jni_FindClass+0x428
>>>>> C  [libjava.so+0x20208]  JNU_CallStaticMethodByName+0xff
>>>>> C  [libjava.so+0x21cae]  jnuEncodingSupported+0x61
>>>>> C  [libjava.so+0x22125]  JNU_GetStringPlatformChars+0x125
>>>>> C  [libjava.so+0xedcd]
>>>>> Java_java_lang_ClassLoader_00024NativeLibrary_findBuiltinLib+0x8b
>>>>> j
>>>>>
>>>>> java.lang.ClassLoader$NativeLibrary.findBuiltinLib(Ljava/lang/String;)Ljava/lang/String;+0
>>>>> j  java.lang.ClassLoader.loadLibrary0(Ljava/lang/Class;Ljava/io/File;)Z+4
>>>>> j
>>>>>
>>>>> java.lang.ClassLoader.loadLibrary(Ljava/lang/Class;Ljava/lang/String;Z)V+228
>>>>> j
>>>>> java.lang.Runtime.loadLibrary0(Ljava/lang/Class;Ljava/lang/String;)V+54
>>>>> j  java.lang.System.loadLibrary(Ljava/lang/String;)V+7
>>>>> j  java.lang.System.initializeSystemClass()V+113
>>>>> v  ~StubRoutines::call_stub
>>>>> V  [libjvm.so+0x9d279a]  JavaCalls::call_helper(JavaValue*,
>>>>> methodHandle*,
>>>>> JavaCallArguments*, Thread*)+0x6b4
>>>>> V  [libjvm.so+0xcad591]  os::os_exception_wrapper(void (*)(JavaValue*,
>>>>> methodHandle*, JavaCallArguments*, Thread*), JavaValue*, methodHandle*,
>>>>> JavaCallArguments*, Thread*)+0x45
>>>>> V  [libjvm.so+0x9d20cf]  JavaCalls::call(JavaValue*, methodHandle,
>>>>> JavaCallArguments*, Thread*)+0x8b
>>>>> V  [libjvm.so+0x9d1d3b]  JavaCalls::call_static(JavaValue*, KlassHandle,
>>>>> Symbol*, Symbol*, JavaCallArguments*, Thread*)+0x139
>>>>> V  [libjvm.so+0x9d1e3f]  JavaCalls::call_static(JavaValue*, KlassHandle,
>>>>> Symbol*, Symbol*, Thread*)+0x9d
>>>>> V  [libjvm.so+0xe3cceb]  call_initializeSystemClass(Thread*)+0xb0
>>>>> V  [libjvm.so+0xe44444]
>>>>> Threads::initialize_java_lang_classes(JavaThread*,
>>>>> Thread*)+0x21a
>>>>> V  [libjvm.so+0xe44b12]  Threads::create_vm(JavaVMInitArgs*, bool*)+0x4a6
>>>>> V  [libjvm.so+0xa19bd7]  JNI_CreateJavaVM+0xc7
>>>>> C  [libjli.so+0xa520]  InitializeJVM+0x154
>>>>> C  [libjli.so+0x8024]  JavaMain+0xcc
>>>>>
>>>>>
>




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