Re: Crash when starting App that instantiates a JavaVM

Subject: Re: Crash when starting App that instantiates a JavaVM
From: Mike Swingler <email@hidden>
Date: Wed, 10 Jun 2009 07:17:28 -0700
Delivered-to: email@hidden
Delivered-to: email@hidden

Unfortunately, I can't really tell what is going on since too many stack frames were truncated from Thread 0.

My guess is that JNFLookupClass class is failing either because the bootclasspath is somehow messed up, or the JNIEnv* it was passed is uninitialized (somehow). Does your app have any specific JVM version requirements? Do you now if the customer has installed the Java for Mac OS X 10.5 Update 4 developer preview? Is this crash a new development, or something they have seen intermittently (perhaps on other OS versions)?

We really need the whole set of stack frames to understand how the code is getting into this state.

Thanks,
Mike Swingler
Java Runtime Engineer
Apple Inc.

On Jun 10, 2009, at 6:26 AM, Thomas Schleu wrote:

Hi, A customer has a (non-reproducable) crash of our Cocoa-App which instantiates a JavaVM when starting up. The app crashes in the main thread while processing the OpenApp AppleEvent while in another thread the JavaVM is just being instantiated. For me it looks like the AWTStarter is not thread-safe in the method [AWTStarter appKitIsRunning:] when the method [AWTStarter start:swtMode:swtModeForWebStart:] is being executed.
Here is the crashlog (reduced):
OS Version:      Mac OS X 10.5.7 (9J61)
Exception Type:  EXC_BAD_ACCESS (SIGBUS)
Exception Codes: KERN_PROTECTION_FAILURE at 0x0000000000000000
Crashed Thread:  0
Thread 0 Crashed: 0 JavaNativeFoundation 0x17a7d836 JNFLookupClass + 23 1 JavaNativeFoundation 0x17a7d8ea JNFLookupMemberID + 49 2 JavaNativeFoundation 0x17a7f4fa JNFCallStaticBooleanMethod + 52 3 libawt.jnilib 0x1d1e0676 +[AWTStarter appKitIsRunning:] + 282 ... 18 com.apple.HIToolbox 0x9388a961 AEProcessAppleEvent + 38 ... 21 com.apple.AppKit 0x9117f5fb -[NSApplication run] + 795 ... 25 com.canto.cumulus 0x000026f5 start + 41

Thread 6: 0 libSystem.B.dylib 0x9728746e __semwait_signal + 10 1 libSystem.B.dylib 0x972b1dcd pthread_cond_wait $UNIX2003 + 73 2 libawt.jnilib 0x1d1de42c +[AWTStarter start:swtMode:swtModeForWebStart:] + 537 3 libawt.jnilib 0x1d1f7de5 JNI_OnLoad + 625 4 libjava.jnilib 0x17a8de88 Java_java_lang_ClassLoader_00024NativeLibrary_load + 175 ... 42 libjvm.dylib 0x188d226b JNI_CreateJavaVM_Impl + 3995 ... 47 libSystem.B.dylib 0x972b1155 _pthread_start + 321 48 libSystem.B.dylib 0x972b1012 thread_start + 34
Thread 0 crashed with X86 Thread State (32-bit):
 eax: 0x1d361b76  ebx: 0x17a7d8d0  ecx: 0xbfffeba8  edx: 0x00000001
 edi: 0x00000000  esi: 0xbfffeba8  ebp: 0xbfffea98  esp: 0xbfffea70
  ss: 0x0000001f  efl: 0x00010282  eip: 0x17a7d836   cs: 0x00000017
  ds: 0x0000001f   es: 0x0000001f   fs: 0x00000000   gs: 0x00000037
 cr2: 0x00000000
Binary Images:
 0x46b000 -   0x471ffd  com.apple.JavaVM 12.2.2 (12.2.2)
<9ad39149cc7ecc91da3e93df7f61d315>
/System/Library/Frameworks/JavaVM.framework/Versions/A/JavaVM
Does anyone know a way to work around this problem?

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  >Crash when starting App that instantiates a JavaVM (From: "Thomas Schleu" <email@hidden>)




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References:
	>Crash when starting App that instantiates a JavaVM (From: "Thomas Schleu" <email@hidden>)