Exception Access Violation using Native.invokeInt about jna HOT 3 CLOSED

Please provide more context:

• what does your callback signature/native signature look like?
• what is triggering the callback?
• what code is being executed and what process is in progress when the error occurs?

Make sure that your callback object can not be GC'd prematurely.

I'm guessing that your callback is a message handler ultimately invoked by windows DispatchMessage. Make sure the signature is compatible (i.e. calling convention, return type, arguments) with the native declarations. Message handlers must use the stdcall calling convention (i.e. requires StdCallCallback).

On Mar 1, 2012, at 7:14 AM, skestle wrote:

I'm getting the following c exception (presumably in the jna dll?? I've been developing with Canon's EDSDK and am returning from a dispatched event.

The last java line executed is CallbackReference callback(Object[]), and it's returning an Integer of 0.

Am I doing something wrong, is there a bug in JNA, or is this a JVM bug?

I've replicated in JNA 3.3.0 and 3.4.0, as well as jdk 6.0_17 and jre 6.0_30

#
# A fatal error has been detected by the Java Runtime Environment:
#
#  EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x18667504, pid=11744, tid=12368
#
# JRE version: 6.0_30-b12
# Java VM: Java HotSpot(TM) Client VM (20.5-b03 mixed mode windows-x86 )
# Problematic frame:
# C  0x18667504
#
# If you would like to submit a bug report, please visit:
#   http://java.sun.com/webapps/bugreport/crash.jsp
# The crash happened outside the Java Virtual Machine in native code.
# See problematic frame for where to report the bug.
#

---------------  T H R E A D  ---------------

Current thread (0x017d9800):  JavaThread "main" [_thread_in_native, id=12368, stack(0x00370000,0x003c0000)]

siginfo: ExceptionCode=0xc0000005, reading address 0x00000000

Registers:
EAX=0x00000000, EBX=0x00000000, ECX=0x003bf0dc, EDX=0x18241b6c
ESP=0x003bf110, EBP=0x003bf150, ESI=0x18666f78, EDI=0x00000201
EIP=0x18667504, EFLAGS=0x00010246

Top of Stack: (sp=0x003bf110)
0x003bf110:   00000001 183fb61c 18962ab8 9df3eaed
0x003bf120:   18662f40 18660c68 1895caf0 18951870
0x003bf130:   00000001 00000000 18667500 00000000
0x003bf140:   003bf11c 003bf234 1842f1eb ffffffff
0x003bf150:   18662f08 1840d114 00000000 18662f40
0x003bf160:   183f047d 18660c68 000c1272 00000000
0x003bf170:   003bf1c8 00000000 773941d4 1895cac0
0x003bf180:   0000c092 18662f58 18662f40 1895cac0 

Instructions: (pc=0x18667504)
0x186674e4:   03 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x186674f4:   00 00 00 00 a5 97 d6 18 00 00 00 8c 1c 5f 43 18
0x18667504:   02 30 00 00 70 2a 96 18 7c 2a 96 18 7c 2a 96 18
0x18667514:   01 38 00 00 99 97 d6 18 00 00 00 88 00 00 00 00 


Register to memory mapping:

EAX=0x00000000 is an unknown value
EBX=0x00000000 is an unknown value
ECX=0x003bf0dc is pointing into the stack for thread: 0x017d9800
EDX=0x18241b6c is an unknown value
ESP=0x003bf110 is pointing into the stack for thread: 0x017d9800
EBP=0x003bf150 is pointing into the stack for thread: 0x017d9800
ESI=0x18666f78 is an unknown value
EDI=0x00000201 is an unknown value


Stack: [0x00370000,0x003c0000],  sp=0x003bf110,  free space=316k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
C  0x18667504

Java frames: (J=compiled Java code, j=interpreted, Vv=VM code)
j  com.sun.jna.Native.invokeInt(JI[Ljava/lang/Object;)I+0
j  com.sun.jna.Function.invoke([Ljava/lang/Object;Ljava/lang/Class;Z)Ljava/lang/Object;+333
j  com.sun.jna.Function.invoke(Ljava/lang/Class;[Ljava/lang/Object;Ljava/util/Map;)Ljava/lang/Object;+214
j  com.sun.jna.Library$Handler.invoke(Ljava/lang/Object;Ljava/lang/reflect/Method;[Ljava/lang/Object;)Ljava/lang/Object;+341
j  $Proxy2.DispatchMessage(Lcom/sun/jna/platform/win32/WinUser$MSG;)Lcom/sun/jna/platform/win32/WinDef$LRESULT;+16
j  net.kestle.platform.windows.User32$.dispatchMessage(Lcom/sun/jna/platform/win32/WinUser$MSG;)Lcom/sun/jna/platform/win32/WinDef$LRESULT;+5
j  EosTest$.consumeAndDispachMessage()V+27
j  EosTest$.main([Ljava/lang/String;)V+110
j  EosTest.main([Ljava/lang/String;)V+4
v  ~StubRoutines::call_stub

---------------  P R O C E S S  ---------------

Java Threads: ( => current thread )
 0x019bfc00 JavaThread "Low Memory Detector" daemon [_thread_blocked, id=11988, stack(0x17cd0000,0x17d20000)]
 0x019b2800 JavaThread "C1 CompilerThread0" daemon [_thread_blocked, id=12548, stack(0x17c80000,0x17cd0000)]
 0x019b1800 JavaThread "Attach Listener" daemon [_thread_blocked, id=13580, stack(0x17c30000,0x17c80000)]
 0x019ae800 JavaThread "Signal Dispatcher" daemon [_thread_blocked, id=11152, stack(0x17be0000,0x17c30000)]
 0x01974c00 JavaThread "Finalizer" daemon [_thread_blocked, id=13724, stack(0x17b90000,0x17be0000)]
 0x01970000 JavaThread "Reference Handler" daemon [_thread_blocked, id=12296, stack(0x17b40000,0x17b90000)]
=>0x017d9800 JavaThread "main" [_thread_in_native, id=12368, stack(0x00370000,0x003c0000)]

Other Threads:
 0x0196cc00 VMThread [stack: 0x17af0000,0x17b40000] [id=13500]
 0x019da800 WatcherThread [stack: 0x17d20000,0x17d70000] [id=7384]

VM state:not at safepoint (normal execution)

VM Mutex/Monitor currently owned by a thread: None

Heap
def new generation   total 4928K, used 2377K [0x039e0000, 0x03f30000, 0x08f30000)
 eden space 4416K,  44% used [0x039e0000, 0x03bcd5a0, 0x03e30000)
 from space 512K,  78% used [0x03eb0000, 0x03f14e98, 0x03f30000)
 to   space 512K,   0% used [0x03e30000, 0x03e30000, 0x03eb0000)
tenured generation   total 10944K, used 0K [0x08f30000, 0x099e0000, 0x139e0000)
  the space 10944K,   0% used [0x08f30000, 0x08f30000, 0x08f30200, 0x099e0000)
compacting perm gen  total 12288K, used 5795K [0x139e0000, 0x145e0000, 0x179e0000)
  the space 12288K,  47% used [0x139e0000, 0x13f88ec0, 0x13f89000, 0x145e0000)
No shared spaces configured.

Code Cache  [0x019e0000, 0x01a88000, 0x039e0000)
total_blobs=266 nmethods=107 adapters=95 free_code_cache=32888704 largest_free_block=0

Dynamic libraries:
0x00400000 - 0x00425000   C:\Program Files\Java\jre6\bin\javaw.exe
0x77940000 - 0x77a7c000   C:\Windows\SYSTEM32\ntdll.dll
0x76b90000 - 0x76c64000   C:\Windows\system32\kernel32.dll
0x75cc0000 - 0x75d0a000   C:\Windows\system32\KERNELBASE.dll
0x77500000 - 0x775a0000   C:\Windows\system32\ADVAPI32.dll
0x76de0000 - 0x76e8c000   C:\Windows\system32\msvcrt.dll
0x76b70000 - 0x76b89000   C:\Windows\SYSTEM32\sechost.dll
0x772b0000 - 0x77351000   C:\Windows\system32\RPCRT4.dll
0x77360000 - 0x77429000   C:\Windows\system32\USER32.dll
0x76d90000 - 0x76dde000   C:\Windows\system32\GDI32.dll
0x77b60000 - 0x77b6a000   C:\Windows\system32\LPK.dll
0x77aa0000 - 0x77b3d000   C:\Windows\system32\USP10.dll
0x77b40000 - 0x77b5f000   C:\Windows\system32\IMM32.DLL
0x77430000 - 0x774fc000   C:\Windows\system32\MSCTF.dll
0x7c340000 - 0x7c396000   C:\Program Files\Java\jre6\bin\msvcr71.dll
0x6d7f0000 - 0x6da9f000   C:\Program Files\Java\jre6\bin\client\jvm.dll
0x73900000 - 0x73932000   C:\Windows\system32\WINMM.dll
0x75a00000 - 0x75a4b000   C:\Windows\system32\apphelp.dll
0x6d7a0000 - 0x6d7ac000   C:\Program Files\Java\jre6\bin\verify.dll
0x6d320000 - 0x6d33f000   C:\Program Files\Java\jre6\bin\java.dll
0x6d7e0000 - 0x6d7ef000   C:\Program Files\Java\jre6\bin\zip.dll
0x6d000000 - 0x6d14c000   C:\Program Files\Java\jre6\bin\awt.dll
0x718d0000 - 0x71921000   C:\Windows\system32\WINSPOOL.DRV
0x77680000 - 0x777dc000   C:\Windows\system32\ole32.dll
0x748a0000 - 0x74a3e000   C:\Windows\WinSxS\x86_microsoft.windows.common-controls_6595b64144ccf1df_6.0.7600.16661_none_420fe3fa2b8113bd\COMCTL32.dll
0x77250000 - 0x772a7000   C:\Windows\system32\SHLWAPI.dll
0x75650000 - 0x75666000   C:\Windows\system32\CRYPTSP.dll
0x73d70000 - 0x73dab000   C:\Windows\system32\rsaenh.dll
0x75150000 - 0x75167000   C:\Windows\system32\USERENV.dll
0x75ad0000 - 0x75adb000   C:\Windows\system32\profapi.dll
0x75a50000 - 0x75a5c000   C:\Windows\system32\CRYPTBASE.dll
0x6d600000 - 0x6d613000   C:\Program Files\Java\jre6\bin\net.dll
0x777e0000 - 0x77815000   C:\Windows\system32\WS2_32.dll
0x76c70000 - 0x76c76000   C:\Windows\system32\NSI.dll
0x75550000 - 0x7558c000   C:\Windows\system32\mswsock.dll
0x75670000 - 0x75676000   C:\Windows\System32\wship6.dll
0x739a0000 - 0x739b0000   C:\Windows\system32\NLAapi.dll
0x753a0000 - 0x753e4000   C:\Windows\system32\DNSAPI.dll
0x6f900000 - 0x6f908000   C:\Windows\System32\winrnr.dll
0x6f8f0000 - 0x6f900000   C:\Windows\system32\napinsp.dll
0x6f8d0000 - 0x6f8e2000   C:\Windows\system32\pnrpnsp.dll
0x6f8c0000 - 0x6f8cd000   C:\Windows\system32\wshbth.dll
0x6f890000 - 0x6f8b7000   C:\Program Files\Common Files\Microsoft Shared\Windows Live\WLIDNSP.DLL
0x77a80000 - 0x77a85000   C:\Windows\system32\PSAPI.DLL
0x6f7d0000 - 0x6f7f1000   C:\Program Files\Bonjour\mdnsNSP.dll
0x73740000 - 0x7375c000   C:\Windows\system32\Iphlpapi.DLL
0x73730000 - 0x73737000   C:\Windows\system32\WINNSI.DLL
0x75060000 - 0x75065000   C:\Windows\System32\wshtcpip.dll
0x6f720000 - 0x6f726000   C:\Windows\system32\rasadhlp.dll
0x71fb0000 - 0x71fe8000   C:\Windows\System32\fwpuclnt.dll
0x18160000 - 0x181d2000   C:\Users\Stephen\AppData\Local\Temp\jna\jna4222644062414367285.dll
0x183e0000 - 0x18454000   C:\development\Projects\TechShred\CanonEos\src\main\native\EDSDK.dll
0x76e90000 - 0x7702d000   C:\Windows\system32\SETUPAPI.dll
0x75d10000 - 0x75d37000   C:\Windows\system32\CFGMGR32.dll
0x76c80000 - 0x76d0f000   C:\Windows\system32\OLEAUT32.dll
0x75b50000 - 0x75b62000   C:\Windows\system32\DEVOBJ.dll
0x74580000 - 0x745c0000   C:\Windows\system32\uxtheme.dll
0x745e0000 - 0x745f3000   C:\Windows\system32\dwmapi.dll
0x68720000 - 0x68753000   C:\Windows\system32\STI.DLL
0x18a40000 - 0x18b44000   C:\development\Projects\TechShred\CanonEos\src\main\native\EdsImage.dll
0x75b70000 - 0x75b9d000   C:\Windows\system32\WINTRUST.dll
0x75ba0000 - 0x75cbc000   C:\Windows\system32\CRYPT32.dll
0x75b40000 - 0x75b4c000   C:\Windows\system32\MSASN1.dll
0x775f0000 - 0x77673000   C:\Windows\system32\CLBCatQ.DLL
0x18b50000 - 0x18bd9000   C:\Windows\system32\PortableDeviceApi.dll
0x6e590000 - 0x6e5bb000   C:\Windows\system32\PortableDeviceTypes.dll
0x746b0000 - 0x747a5000   C:\Windows\system32\PROPSYS.dll
0x75ac0000 - 0x75ace000   C:\Windows\system32\RpcRtRemote.dll
0x75ef0000 - 0x76b39000   C:\Windows\system32\SHELL32.dll
0x6f730000 - 0x6f763000   C:\Program Files\Windows Portable Devices\SqmApi.dll

VM Arguments:
jvm_args: -Djna.library.path=src\main\native -Dfile.encoding=Cp1252 -Xbootclasspath/p:C:\development\Tools\eclipse-indigo\configuration\org.eclipse.osgi\bundles\1061\1\.cp\lib\scala-library.jar;C:\development\Tools\eclipse-indigo\configuration\org.eclipse.osgi\bundles\1061\1\.cp\lib\scala-dbc.jar;C:\development\Tools\eclipse-indigo\configuration\org.eclipse.osgi\bundles\1061\1\.cp\lib\scala-swing.jar 
java_command: EosTest
Launcher Type: SUN_STANDARD

Environment Variables:
JAVA_HOME=C:\Program Files\Java\jdk1.6.0_17
CLASSPATH=.;C:\Program Files\Java\jdk1.6.0_17\lib\ext\QTJava.zip;C:\Program Files\Java\jre6\lib\ext\QTJava.zip
PATH=C:/Program Files/Java/jre6/bin/client;C:/Program Files/Java/jre6/bin;C:/Program Files/Java/jre6/lib/i386;C:\Program Files\Common Files\Microsoft Shared\Windows Live;C:\Program Files\PC Connectivity Solution\;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program Files\Common Files\Adobe\AGL;C:\Program Files\TortoiseSVN\bin;O:\CommonPlatform\build\ant\bin;C:\Program Files\Java\jdk1.6.0_17\bin;C:\development\Tools\Maven\bin;C:\Program Files\Windows Live\Shared;C:\development\Tools\pax-runner-1.5.0\bin;C:\Program Files\Git\cmd;C:\development\Tools\sbt;C:\Program Files\TortoiseHg\;C:\Program Files\QuickTime\QTSystem\;C:\development\Tools\eclipse-indigo;
USERNAME=Stephen
OS=Windows_NT
PROCESSOR_IDENTIFIER=x86 Family 6 Model 15 Stepping 10, GenuineIntel



---------------  S Y S T E M  ---------------

OS: Windows 7 Build 7600 

CPU:total 2 (2 cores per cpu, 1 threads per core) family 6 model 15 stepping 10, cmov, cx8, fxsr, mmx, sse, sse2, sse3, ssse3

Memory: 4k page, physical 3145016k(222444k free), swap 7503996k(2463040k free)

vm_info: Java HotSpot(TM) Client VM (20.5-b03) for windows-x86 JRE (1.6.0_30-b12), built on Nov 10 2011 01:51:00 by "java_re" with MS VC++ 7.1 (VS2003)

time: Fri Mar 02 00:51:33 2012
elapsed time: 9 seconds

---

Reply to this email directly or view it on GitHub:
#56

from jna.

Thanks for the fast reply! I can give you basics right now, but will be able to update with signatures later in the evening. I'm not sure they'll be of much relevance, as they've all executed and jna is about to returrn Integer(0)

I'm using the Canon EDSDK, and have wrapped jna's User32 lib. My consumeAndDispatchMessages method is basically
dispatchMessage(getMessage()) (where getMessage is called with the msg pointer and null, 0, 0).

The callback executes, displaing information about the incoming event (to my code), I return new NativeLong(0) which by the time we get back to CallbackReference callback(Object[]) we are effectively about to execute return new Integer(0). Continuing execution at that point causes the crash.

from jna.

I'm going to work on getting a java replication case for this, but for the moment I can attach my current scala code (which should be reasonably self-explanitory:

val eventHandler = new EdsObjectEventHandler {
        def apply(inEvent: NativeLong, inRef: EDSDKTypesLibrary.__EdsObject, inContext: EDSDKTypesLibrary.EdsVoid): NativeLong = {
          println("Event: " + inEvent.longValue)
          new NativeLong(0)
        }
      }

which is implementing the Canon EosSdk's callback function

    public interface EdsObjectEventHandler extends Callback {
        NativeLong apply(NativeLong inEvent, EDSDKTypesLibrary.__EdsObject inRef, EDSDKTypesLibrary.EdsVoid inContext);
    };

[Pause editing ... 2 min pass ... ]

uh.

That would be your comment there

Changing Callback to StdCallCallback does the trick. I guess the jnaerator cannot identify exactly how a callback will be used.

Again, thanks for the fast reply. Apologies for using your time. Hopefully this many others will stumble upon this instead of opening new issues.

from jna.