JDK-4695869 : stress test intermittently crashes VM
  • Type: Bug
  • Component: hotspot
  • Sub-Component: runtime
  • Affected Version: 1.4.1
  • Priority: P3
  • Status: Closed
  • Resolution: Fixed
  • OS: solaris_8
  • CPU: sparc
  • Submitted: 2002-05-31
  • Updated: 2002-11-20
  • Resolved: 2002-11-13
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1.4.2 mantisFixed
Related Reports
Relates :  

Name: ipR10196			Date: 05/31/2002

Tests           : 

TestBase        : testbase_nsk 
VM              : server 64-bit
Mode            : mixed
Platform        : sparc
OS              : 5.8

Steps to reproduce 
1. cd /net/sqesvr.eng/export/vsn/GammaBase/Bugs/{BugID}
2. sh doit.sh $JAVA_HOME -d64 [JAVA_OPTS]

Crash is intermittent, so one may have to wait for test
to be executed several times in a loop till the crash occurs.

This test uses stressing technique by running large bundle of JCK
tests simultaneously. This produces a number of OutOfMemoryError
exceptions, so the test works in a limited memory space.
This leads to a variation of the test crash:

Unexpected Signal : 10 occurred at PC=0xFFFFFFFF7E6D1698
Function=[Unknown. Nearest: JVM_SetClassSigners+0xC0F0]

Dynamic libraries:
0x100000000 	/net/alpheridies/export/VM/hopper/weekly/JDK/b13/solaris-sparcv9/bin/sparcv9/java
0xffffffff7f200000 	/usr/lib/64/libthread.so.1
0xffffffff7f400000 	/usr/lib/64/libdl.so.1
0xffffffff7ef00000 	/usr/lib/64/libc.so.1
0xffffffff7ed00000 	/usr/platform/SUNW,Ultra-60/lib/sparcv9/libc_psr.so.1
0xffffffff7e400000 	/net/alpheridies/export/VM/hopper/weekly/JDK/b13/solaris-sparcv9/jre/lib/sparcv9/server/libjvm.so
0xffffffff7e200000 	/usr/lib/64/libCrun.so.1
0xffffffff7e000000 	/usr/lib/64/libsocket.so.1
0xffffffff7dd00000 	/usr/lib/64/libnsl.so.1
0xffffffff7db00000 	/usr/lib/64/libm.so.1
0xffffffff7f100000 	/usr/lib/64/libw.so.1
0xffffffff7d800000 	/usr/lib/64/libmp.so.2
0xffffffff7d500000 	/usr/lib/64/librt.so.1
0xffffffff7d300000 	/usr/lib/64/libaio.so.1
0xffffffff7d100000 	/usr/lib/64/libmd5.so.1
0xffffffff7ce00000 	/usr/platform/SUNW,Ultra-60/lib/sparcv9/libmd5_psr.so.1
0xffffffff7cc00000 	/net/alpheridies/export/VM/hopper/weekly/JDK/b13/solaris-sparcv9/jre/lib/sparcv9/native_threads/libhpi.so
0xffffffff7c800000 	/net/alpheridies/export/VM/hopper/weekly/JDK/b13/solaris-sparcv9/jre/lib/sparcv9/libverify.so
0xffffffff7c600000 	/net/alpheridies/export/VM/hopper/weekly/JDK/b13/solaris-sparcv9/jre/lib/sparcv9/libjava.so
0xffffffff7c300000 	/net/alpheridies/export/VM/hopper/weekly/JDK/b13/solaris-sparcv9/jre/lib/sparcv9/libzip.so
0xffffffff2f500000 	/net/alpheridies/export/VM/hopper/weekly/JDK/b13/solaris-sparcv9/jre/lib/sparcv9/libawt.so
0xffffffff2f200000 	/net/alpheridies/export/VM/hopper/weekly/JDK/b13/solaris-sparcv9/jre/lib/sparcv9/libmlib_image.so
0xffffffff2f000000 	/net/alpheridies/export/VM/hopper/weekly/JDK/b13/solaris-sparcv9/jre/lib/sparcv9/motif21/libmawt.so
0xffffffff2eb00000 	/usr/dt/lib/sparcv9/libXm.so.4
0xffffffff2e900000 	/usr/openwin/lib/sparcv9/libXt.so.4
0xffffffff2e700000 	/usr/openwin/lib/sparcv9/libXext.so.0
0xffffffff2e500000 	/usr/openwin/lib/sparcv9/libXtst.so.1
0xffffffff2e200000 	/usr/openwin/lib/sparcv9/libX11.so.4
0xffffffff2e000000 	/usr/openwin/lib/sparcv9/libdps.so.5
0xffffffff2de00000 	/usr/openwin/lib/sparcv9/libSM.so.6
0xffffffff2db00000 	/usr/openwin/lib/sparcv9/libICE.so.6
0xffffffff2d900000 	/net/alpheridies/export/VM/hopper/weekly/JDK/b13/solaris-sparcv9/jre/lib/sparcv9/libfontmanager.so
0xffffffff2d200000 	/usr/lib/sparcv9/liblayout.so
0xffffffff25e00000 	/net/alpheridies/export/VM/hopper/weekly/JDK/b13/solaris-sparcv9/jre/lib/sparcv9/libdcpr.so

Local Time = Sat May 25 01:55:08 2002
Elapsed Time = 193
# HotSpot Virtual Machine Error : 10
# Error ID : 4F530E43505002E6 01
# Please report this error at
# http://java.sun.com/cgi-bin/bugreport.cgi
# Java VM: Java HotSpot(TM) 64-Bit Server VM (1.4.1-beta-b13 mixed mode)
# An error report file has been saved as hs_err_pid19169.log.
# Please refer to the file for further information.


An unexpected exception has been detected in native code outside the VM.
Unexpected Signal : 11 occurred at PC=0xFFFFFFFF2DF20AD4
Function=[Unknown. Nearest: DPSInitCommonTextContextProcs+0x24]

Current Java thread:
        at sun.awt.font.NativeFontWrapper.getGlyphInfo(Native Method)
        - locked <ffffffff3492fb28> (a java.lang.Class)
        at sun.awt.font.StandardGlyphVector.getGlyphInfo(StandardGlyphVector.java:1245)
        at sun.awt.font.AdvanceCache.initLatinAdvances(AdvanceCache.java:172)
        at sun.awt.font.AdvanceCache.<init>(AdvanceCache.java:206)
        at sun.awt.font.AdvanceCache.get(AdvanceCache.java:162)
        - locked <ffffffff318843f0> (a [Ljava.lang.ref.SoftReference;)
        at java.awt.font.TextLayout$OptInfo.getAdvance(TextLayout.java:248)
        at java.awt.font.TextLayout.getAdvance(TextLayout.java:1016)
        at javasoft.sqe.tests.api.java.awt.java2d.font.TextLayout.GetTest.testCase1(GetTest.java:99)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:324)
        at javasoft.sqe.jck.lib.MultiTest.run(MultiTest.java:137)
        at javasoft.sqe.stresstest.StressTest$TestThread.run(StressTest.java:829)

Dynamic libraries:
0x100000000     /net/alpheridies/export/VM/hopper/weekly/JDK/b13/solaris-sparcv9/bin/sparcv9/java
0xffffffff7f300000      /usr/lib/64/libthread.so.1
0xffffffff7f500000      /usr/lib/64/libdl.so.1
0xffffffff7ef00000      /usr/lib/64/libc.so.1
0xffffffff7ee00000      /usr/platform/SUNW,Ultra-4/lib/sparcv9/libc_psr.so.1
0xffffffff7d000000      /net/alpheridies/export/VM/hopper/weekly/JDK/b13/solaris-sparcv9/jre/lib/sparcv9/server/libjvm.so
0xffffffff7ce00000      /usr/lib/64/libCrun.so.1
0xffffffff7cc00000      /usr/lib/64/libsocket.so.1
0xffffffff7ca00000      /usr/lib/64/libnsl.so.1
0xffffffff7c800000      /usr/lib/64/libm.so.1
0xffffffff7d900000      /usr/lib/64/libw.so.1
0xffffffff7c500000      /usr/lib/64/libmp.so.2
0xffffffff7c200000      /net/alpheridies/export/VM/hopper/weekly/JDK/b13/solaris-sparcv9/jre/lib/sparcv9/native_threads/libhpi.so
0xffffffff7c000000      /net/alpheridies/export/VM/hopper/weekly/JDK/b13/solaris-sparcv9/jre/lib/sparcv9/libverify.so
0xffffffff7bd00000      /net/alpheridies/export/VM/hopper/weekly/JDK/b13/solaris-sparcv9/jre/lib/sparcv9/libjava.so
0xffffffff7bb00000      /net/alpheridies/export/VM/hopper/weekly/JDK/b13/solaris-sparcv9/jre/lib/sparcv9/libzip.so
0xffffffff2f300000      /net/alpheridies/export/VM/hopper/weekly/JDK/b13/solaris-sparcv9/jre/lib/sparcv9/libawt.so
0xffffffff2f100000      /net/alpheridies/export/VM/hopper/weekly/JDK/b13/solaris-sparcv9/jre/lib/sparcv9/libmlib_image.so
0xffffffff2ef00000      /net/alpheridies/export/VM/hopper/weekly/JDK/b13/solaris-sparcv9/jre/lib/sparcv9/motif21/libmawt.so
0xffffffff2ea00000      /usr/dt/lib/sparcv9/libXm.so.4
0xffffffff2e800000      /usr/openwin/lib/sparcv9/libXt.so.4
0xffffffff2e600000      /usr/openwin/lib/sparcv9/libXext.so.0
0xffffffff2e400000      /usr/openwin/lib/sparcv9/libXtst.so.1
0xffffffff2e200000      /usr/openwin/lib/sparcv9/libX11.so.4
0xffffffff2df00000      /usr/openwin/lib/sparcv9/libdps.so.5
0xffffffff2dd00000      /usr/openwin/lib/sparcv9/libSM.so.6
0xffffffff2db00000      /usr/openwin/lib/sparcv9/libICE.so.6
0xffffffff2d800000      /usr/openwin/lib/sparcv9/libdga.so.1
0xffffffff2d600000      /net/alpheridies/export/VM/hopper/weekly/JDK/b13/solaris-sparcv9/jre/lib/sparcv9/libfontmanager.so
0xffffffff2d000000      /usr/lib/sparcv9/liblayout.so
0xffffffff2b500000      /net/alpheridies/export/VM/hopper/weekly/JDK/b13/solaris-sparcv9/jre/lib/sparcv9/libdcpr.so
0xffffffff2c700000      /net/alpheridies/export/VM/hopper/weekly/JDK/b13/solaris-sparcv9/jre/lib/sparcv9/libcmm.so
0xffffffff1ce00000      /net/alpheridies/export/VM/hopper/weekly/JDK/b13/solaris-sparcv9/jre/lib/sparcv9/libmlib_image_v.so

Local Time = Fri May 31 16:01:13 2002
Elapsed Time = 135
# The exception above was detected in native code outside the VM
# Java VM: Java HotSpot(TM) 64-Bit Server VM (1.4.1-beta-b13 mixed mode)
# An error report file has been saved as hs_err_pid22116.log.
# Please refer to the file for further information.
Exit status = 134

The latter looks like the known integrated bug from java/classes_2D:

  4463818 Stress test jck12a012 crashes or hangs HotSpot VM


CONVERTED DATA BugTraq+ Release Management Values COMMIT TO FIX: mantis FIXED IN: mantis INTEGRATED IN: mantis VERIFIED IN: mantis

SUGGESTED FIX from the putback comments: This stress tests causes several failures. The one this bug addresses is hitting a guarantee in class unloading that a class should only be marked for GC if its defining loader is also marked. The problem was we'd load a class and put it in the system dictionary, but the attempt to add it to a ClassLoader's classes vector (which is what keeps us from GC dead classes before the defining loader is GC'd) could fail with an OutOfMemory error. Three options were considered: - weaken the guarantee (go back to pre-Hopper behavior) That's just a bad idea. This is a corner case, but we need to keep loaded classes alive as long as the ClassLoader is live. - remove the class from the system dictionary if we get OOM Difficult, as we do some other actions (update class hierarchy) at the same time. - Ensure we can add the class to the ClassLoader.classes vector before updating the system dictionary This is the fix I went with. Files: update: src/share/vm/memory/systemDictionary.cpp NOTE that this stress test can still provoke failures; I think some of the might be flushed out with -Xcheck:jni. I'll submit new bugs if I can reproduce anything. ###@###.### 2002-11-01

EVALUATION # # HotSpot Virtual Machine Error, assertion failure # Please report this error at # http://java.sun.com/cgi-bin/bugreport.cgi # # Java VM: Java HotSpot(TM) Client VM (1.4.1-beta-b14-debug mixed mode) # # assert(!thread->has_pending_exception(), "shouldn't be allocating with pending exception") # # Error ID: /BUILD_AREA/jdk1.4.1/hotspot/src/share/vm/gc_interface/collectedHeap.cpp, 42 [ Patched ] # # Problematic Thread: prio=5 tid=0x44ac68 nid=0x20f runnable # Dumping core.... ###@###.### 2002-06-06 Got the following after running for approx 10 minutes with 1.4.1-b14 (product build): # # HotSpot Virtual Machine Error, Internal Error # Please report this error at # http://java.sun.com/cgi-bin/bugreport.cgi # # Java VM: Java HotSpot(TM) 64-Bit Server VM (1.4.1-beta-b14 mixed mode) # # Error happened during: generation collection for allocation # # Error ID: 53595354454D24494354494F4E4152590E4350500373 01 # # Problematic Thread: prio=5 tid=0x1006bf070 nid=0xd6 waiting on condition # Internal Error Fatal: defining loader should not be marked if klass is not Do you want to debug the problem? (dbx) thread t@4 t@4 (l@5) stopped in _read at 0xffffffff7f3a48ac 0xffffffff7f3a48ac: _read+0x0008: ta %icc,%g0 + 64 (dbx) thread -info Thread t@4 (0xffffffff3ab81c90) at priority 64 state: bound to l@5 base function: 0xffffffff7dadfdd0: _start() stack: 0xffffffff3ab82000[1048576] flags: BOUND|DETACHED|SUSPENDED masked signals: (none) Currently active in _read (dbx) where current thread: t@4 =>[1] _read(0x0, 0xffffffff7f4c01dc, 0x400, 0xffffffff7f6267e8, 0xffffffff7f4bb768, 0x0), at 0xffffffff7f3a48ac [2] _filbuf(0xffffffff7f4bad68, 0xffffffff7f4c05dc, 0x1, 0x400, 0x0, 0x0), at 0xffffffff7f396414 [3] fgets(0xffffffff7f4bad68, 0xffffffff7f4c05f8, 0xffffffff7f4bad68, 0xffffffff7f4c05dc, 0xffffffff7f4b25e0, 0x3ff), at 0xffffffff7f398e84 [4] os::message_box(0xffffffff7dd822da, 0xffffffff3ab7fe2c, 0xffffffff3ab8062c, 0xffffffff7dde53f0, 0x0, 0xffffffff7dd824d9), at 0xffffffff7dcea56c [5] report_error(0x1, 0xffffffff7ddd535a, 0x373, 0xffffffff7dd822da, 0xffffffff7dd822e9, 0xffffffff3ab807ec), at 0xffffffff7dbefe38 [6] report_fatal(0xffffffff7ddd535a, 0x373, 0xffffffff7ddd53a0, 0x0, 0x0, 0xffffffff7df717a0), at 0xffffffff7dbef5e4 [7] SystemDictionary::do_unloading(0xffffffff7df98524, 0xffffffff7df7c9d0, 0x0, 0xffffffff32a17f58, 0xffffffff7df71720, 0xffffffff7df716f0), at 0xffffffff7daf7dcc [8] GenMarkSweep::mark_sweep_phase1(0x1, 0xffffffff3ab81284, 0x0, 0xffffffff7dc00fb0, 0x100109e40, 0x9800), at 0xffffffff7dc015b4 ... The fatal error was triggered by the following guarantee() in SystemDictionary::do_unloading(): ... if (!class_loader->is_gc_marked()) { // If the loader is not reachable this entry should always be removed // (will never be looked up again). Note that this is not the same as // unloading the referred class. if (k_def_class_loader == class_loader) { // This is the defining entry, so the referred class is about // to be unloaded. // Notify the debugger and jvmpi, and clean up the class. ------> guarantee(!e->is_gc_marked(), "klass should not be marked if defining loader is not"); class_was_unloaded = true; ###@###.### 2002-06-07 Same failure (Fatal Error in SystemDictionary::do_unloading) also happens with c1 on sparc. ###@###.### 2002-06-11 The test provokes multiple problems, for one example see 4700761. Email from Jane indicates the cause of the problem when the guarantee fails: an OutOfMemoryError happens when the vm calls into java to run ClassLoader.addClass(), and a stale entry is left in the system dictionary. From: Jane Loizeaux - Sun Microsystems <###@###.###> Reply-To: Jane Loizeaux - Sun Microsystems <###@###.###> Subject: classes vector To: ###@###.### Hi John I just looked at ClassLoader.java in the libraries, and classes are added to its internal list of classes via addClass: /* * The classes loaded by this class loader. The only purpose of this * table is to keep the classes from being GC'ed until the loader * is GC'ed. */ private Vector classes = new Vector(); /* * Called by the VM to record every loaded class with this loader. */ void addClass(Class c) { classes.addElement(c); } In the VM, we seem to call this in SystemDictionary::define_instance_klass, which has TRAPS in its arguments. I think we update the SystemDictionary in the update_dictionary call, and then we call addClass after that. I don't understand how we handle exceptions as well as I could, but I don't see how we'd escape between update_dictionary (which has no CHECK in the arguments) and the call out to addClass. So, I'd have to guess that we're failing during the addClass method call (maybe we have to grow the ClassLoader's classes vector to accomodate the addition?). Yikes. I think that Vectors can be given a capacity increment, so maybe changing ClassLoader to use a really large increment would tickle the bug? I just talked to Fred about this one. The problem might well be that in SystemDictionary::define_instance_class, we do something like: update_dictionary eager_initialize ?? not sure what this does, maybe runs initializers? the impl method as an EXCEPTION_MARK, so no exceptions should be thrown; I'm not sure what that means in this context, really. call addClass If the addClass method fails, we definitely have left junk in the dictionary, as we've already updated it. Maybe we should be treating the class as though it had never been loaded. On the other hand, Fred wondered if this is a bug worth spending a lot time trying to solve. Users don't have a lot of recourse when they get an OutOfMemory error (they probably can't execute more code to try to clean things up). But I'm wondering if just changing that guarantee to an if statement really would be the best solution. I'm a little uncomfortable about leaving bad stuff in the system dictionary, but I don't see a clean way to get around that, and changing that code always seems risky. Jane ###@###.### 2002-06-12 There are several bugs provoked by this test case. One is a bug in classes 2D code: native code can call into JNI with a pending exception, which is forbidden by the jni spec. Created bug 4700761 for this classes_2D problem; the bug causes the assert mentioned at the very beginning of the evaluation to fail. Another bug is the fatal error in the system dictionary. Using this bugid to track that problem. The 2 VM failures mentioned in the description a) Unexpected Signal : 10 occurred at PC=0xFFFFFFFF7E6D1698 Function=[Unknown. Nearest: JVM_SetClassSigners+0xC0F0] and b) Unexpected Signal : 11 occurred at PC=0xFFFFFFFF2DF20AD4 Function=[Unknown. Nearest: DPSInitCommonTextContextProcs+0x24] may be still additional bugs provoked by this test. Have not reproduced them yet. ###@###.### 2002-06-12 One possible fix for the fatal error in system dictionary is to detect the OOMError that occurs when SystemDictionary::define_instance_class() calls out to ClassLoader.addClass() and delete the entry that was added to the dictionary. Not sure if this will work because of side effects from the earlier call to add_to_hierarchy(). eager_initialize() was also called on the class, but that should have no side effects on anything but the class itself. ------------------------------- Looking at the code, I think the best thing to do is not create the full-fledged system dictionary entry unless we know it's legal to do so. So I'd change the actions of define_instance from check_constraints can throw a Java exception update compiler info add to system dictionary eager initialize the class if asked to add to ClassLoader vector can throw java exception to check_constraints can throw a Java exception add to ClassLoader vector can throw java exception update compiler info add to system dictionary eager initialize the class if asked to so we don't consider the class OK until we've done everything that could throw a java-level exception. Throwing an exception means we return from define_instance immediately (and the caller will do some cleanups), so actions after that won't occur. ###@###.### 2002-10-24