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  3. JNA 포인터가 잘못된 메모리 액세스로 인해 EXCEPTION_ACCESS_VIOLATION이 발생합니까?

JNA 포인터가 잘못된 메모리 액세스로 인해 EXCEPTION_ACCESS_VIOLATION이 발생합니까?

2011-03-02 4 views
3

JNA를 사용하여 Java에서 다음 C++ 메소드를 실행하려고 시도하지만 EXCEPTION_ACCESS_VIOLATION이 표시됩니다. 여기 JNA 포인터가 잘못된 메모리 액세스로 인해 EXCEPTION_ACCESS_VIOLATION이 발생합니까?

typedef struct sp_session sp_session; ///< Representation of a session 
/** 
* The connection state of the specified session. 
* 
* @param[in] session Your session object 
* 
* @return     The connection state - see the sp_connectionstate enum for possible values 
*/ 
SP_LIBEXPORT(sp_connectionstate) sp_session_connectionstate(sp_session *session);

내 자바 코드 :

메인 클래스

public class Test{ 
    static{ 
     System.loadLibrary("libspotify"); 
    } 

    public static void main(String[] args){ 
     JLibspotify lib = (JLibspotify)Native.loadLibrary("libspotify", JLibspotify.class); 

     sp_session mySession = new sp_session(); 

     lib.sessionConnectionstate(mySession); // CRASH_HERE 
    } 
}

라이브러리

public interface JLibspotify extends StdCallLibrary{ 
    int sessionConnectionstate(sp_session session); 
}

sp_session 객체 나는 내가에 대한 정보가없는 등의 PointerType으로이 선언

public class sp_session extends PointerType{ 

    public sp_session(Pointer address) { 
     super(address); 
    } 
    public sp_session() { 
     super(); 
    } 
}

그리고 여기 내 충돌 보고서입니다으로 Exception 0xc00000005와 EXCEPTION_ACCESS_VIOLATION 종종 때문이라고

# 
# A fatal error has been detected by the Java Runtime Environment: 
# 
# EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x1008dbf5, pid=4984, tid=6000 
# 
# JRE version: 7.0-b129 
# Java VM: Java HotSpot(TM) Client VM (21.0-b01 mixed mode, sharing windows-x86) 
# Problematic frame: 
# C [libspotify.dll+0x8dbf5] 
# 
# 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 (0x00a49400): JavaThread "main" [_thread_in_native, id=6000, stack(0x00ba0000,0x00bf0000)] 

siginfo: ExceptionCode=0xc0000005, reading address 0x00000000 

Registers: 
EAX=0x00000000, EBX=0x334e8098, ECX=0x00000001, EDX=0x00000004 
ESP=0x00bef7bc, EBP=0x00bef7c8, ESI=0x334e8098, EDI=0x00a49400 
EIP=0x1008dbf5, EFLAGS=0x00010212 

Top of Stack: (sp=0x00bef7bc) 
0x00bef7bc: 00000001 0470dac7 00000000 00bef828 
0x00bef7cc: 047091b9 04708eb0 00bef810 00000004 
0x00bef7dc: 00000001 00befaa0 1008dbf0 650dcd94 
0x00bef7ec: 00a49400 00a49400 334e8098 650dce6a 
0x00bef7fc: 00a49400 00000400 0000000a 00bef828 
0x00bef80c: 00000002 00befa30 00befaa0 00bef850 
0x00bef81c: 00bef874 00000000 00000004 00befa78 
0x00bef82c: 04702161 00befa30 1008dbf0 00befaa0 

Instructions: (pc=0x1008dbf5) 
0x1008dbd5: 0b 8b 01 8b 50 0c ff d2 5e 5b 59 c2 04 00 cc cc 
0x1008dbe5: cc cc cc cc cc cc cc cc cc cc cc 51 8b 44 24 08 
0x1008dbf5: 8b 08 8b 11 8b 42 10 c7 04 24 00 00 00 00 ff d0 
0x1008dc05: 59 c2 04 00 cc cc cc cc cc cc cc 51 53 55 8b 6c 


Register to memory mapping: 

EAX=0x00000000 is an unknown value 
EBX=0x334e8098 is an oop 
{method} 
- klass: {other class} 
ECX=0x00000001 is an unknown value 
EDX=0x00000004 is an unknown value 
ESP=0x00bef7bc is pointing into the stack for thread: 0x00a49400 
EBP=0x00bef7c8 is pointing into the stack for thread: 0x00a49400 
ESI=0x334e8098 is an oop 
{method} 
- klass: {other class} 
EDI=0x00a49400 is a thread 


Stack: [0x00ba0000,0x00bf0000], sp=0x00bef7bc, free space=317k 
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code) 
C [libspotify.dll+0x8dbf5] sp_session_connectionstate+0x5 
C [jna8472051172185323617.tmp+0x91b9] JNI_OnUnload+0xda6 
C [jna8472051172185323617.tmp+0x2161] 
C [jna8472051172185323617.tmp+0x2849] Java_com_sun_jna_Function_invokeInt+0x35 
j com.sun.jna.Function.invokeInt(I[Ljava/lang/Object;)I+0 
j com.sun.jna.Function.invoke([Ljava/lang/Object;Ljava/lang/Class;)Ljava/lang/Object;+309 
j com.sun.jna.Function.invoke(Ljava/lang/Class;[Ljava/lang/Object;Ljava/util/Map;)Ljava/lang/Object;+194 
j com.sun.jna.Library$Handler.invoke(Ljava/lang/Object;Ljava/lang/reflect/Method;[Ljava/lang/Object;)Ljava/lang/Object;+344 
j $Proxy0.sessionConnectionstate(Lcom/nbarraille/jspotify/model/sp_session;)I+16 
j com.nbarraille.jspotify.main.Test.main([Ljava/lang/String;)V+110 
v ~StubRoutines::call_stub 
V [jvm.dll+0x115f6d] 
V [jvm.dll+0x1b788e] 
V [jvm.dll+0x115fed] 
V [jvm.dll+0xa2507] 
V [jvm.dll+0xac867] 
C [javaw.exe+0x209e] 
C [javaw.exe+0xa23b] 
C [javaw.exe+0xa2c5] 
C [kernel32.dll+0x51194] BaseThreadInitThunk+0x12 
C [ntdll.dll+0x5b429] RtlInitializeExceptionChain+0x63 
C [ntdll.dll+0x5b3fc] RtlInitializeExceptionChain+0x36 

Java frames: (J=compiled Java code, j=interpreted, Vv=VM code) 
j com.sun.jna.Function.invokeInt(I[Ljava/lang/Object;)I+0 
j com.sun.jna.Function.invoke([Ljava/lang/Object;Ljava/lang/Class;)Ljava/lang/Object;+309 
j com.sun.jna.Function.invoke(Ljava/lang/Class;[Ljava/lang/Object;Ljava/util/Map;)Ljava/lang/Object;+194 
j com.sun.jna.Library$Handler.invoke(Ljava/lang/Object;Ljava/lang/reflect/Method;[Ljava/lang/Object;)Ljava/lang/Object;+344 
j $Proxy0.sessionConnectionstate(Lcom/nbarraille/jspotify/model/sp_session;)I+16 
j com.nbarraille.jspotify.main.Test.main([Ljava/lang/String;)V+110 
v ~StubRoutines::call_stub 

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

Java Threads: (=> current thread) 
    0x009ffc00 JavaThread "Low Memory Detector" daemon [_thread_blocked, id=680, stack(0x01120000,0x01170000)] 
    0x009fac00 JavaThread "C1 CompilerThread0" daemon [_thread_blocked, id=5032, stack(0x00f00000,0x00f50000)] 
    0x009f9800 JavaThread "Attach Listener" daemon [_thread_blocked, id=6360, stack(0x01090000,0x010e0000)] 
    0x009f6400 JavaThread "Signal Dispatcher" daemon [_thread_blocked, id=652, stack(0x01010000,0x01060000)] 
    0x009ed000 JavaThread "Finalizer" daemon [_thread_blocked, id=1148, stack(0x00d30000,0x00d80000)] 
    0x009e7800 JavaThread "Reference Handler" daemon [_thread_blocked, id=6172, stack(0x00f50000,0x00fa0000)] 
=>0x00a49400 JavaThread "main" [_thread_in_native, id=6000, stack(0x00ba0000,0x00bf0000)] 

Other Threads: 
    0x009e6400 VMThread [stack: 0x00d90000,0x00de0000] [id=4112] 
    0x00a13000 WatcherThread [stack: 0x03e70000,0x03ec0000] [id=4168] 

VM state:not at safepoint (normal execution) 

VM Mutex/Monitor currently owned by a thread: None 

Heap 
def new generation total 4928K, used 1525K [0x23450000, 0x239a0000, 0x289a0000) 
    eden space 4416K, 34% used [0x23450000, 0x235cd6c8, 0x238a0000) 
    from space 512K, 0% used [0x238a0000, 0x238a0000, 0x23920000) 
    to space 512K, 0% used [0x23920000, 0x23920000, 0x239a0000) 
tenured generation total 10944K, used 0K [0x289a0000, 0x29450000, 0x33450000) 
    the space 10944K, 0% used [0x289a0000, 0x289a0000, 0x289a0200, 0x29450000) 
compacting perm gen total 12288K, used 638K [0x33450000, 0x34050000, 0x37450000) 
    the space 12288K, 5% used [0x33450000, 0x334efb70, 0x334efc00, 0x34050000) 
    ro space 10240K, 43% used [0x37450000, 0x3789ce40, 0x3789d000, 0x37e50000) 
    rw space 12288K, 53% used [0x37e50000, 0x384c2710, 0x384c2800, 0x38a50000) 

Code Cache [0x01e50000, 0x01ed8000, 0x03e50000) 
total_blobs=187 nmethods=39 adapters=85 free_code_cache=33013568 largest_free_block=0 

Dynamic libraries: 
0x01220000 - 0x01250000  C:\Program Files\Java\jdk1.7.0\bin\javaw.exe 
0x76dc0000 - 0x76efd000  C:\Windows\SYSTEM32\ntdll.dll 
0x76c10000 - 0x76ce4000  C:\Windows\system32\kernel32.dll 
0x75110000 - 0x7515a000  C:\Windows\system32\KERNELBASE.dll 
0x60000000 - 0x60041000  C:\Program Files\BitDefender\BitDefender 2011\Active Virus Control\Midas_00078_002\midas32.dll 
0x61000000 - 0x61028000  C:\Program Files\BitDefender\BitDefender 2011\Active Virus Control\Midas_00078_002\plugin_base.m32 
0x67000000 - 0x67048000  C:\Program Files\BitDefender\BitDefender 2011\Active Virus Control\Midas_00078_002\plugin_nt.m32 
0x64000000 - 0x64021000  C:\Program Files\BitDefender\BitDefender 2011\Active Virus Control\Midas_00078_002\plugin_registry.m32 
0x62000000 - 0x6202d000  C:\Program Files\BitDefender\BitDefender 2011\Active Virus Control\Midas_00078_002\plugin_extra.m32 
0x65000000 - 0x6501a000  C:\Program Files\BitDefender\BitDefender 2011\Active Virus Control\Midas_00078_002\plugin_net.m32 
0x63000000 - 0x630a6000  C:\Program Files\BitDefender\BitDefender 2011\Active Virus Control\Midas_00078_002\plugin_fragments.m32 
0x75d20000 - 0x75dc0000  C:\Windows\system32\ADVAPI32.dll 
0x75dc0000 - 0x75e6c000  C:\Windows\system32\msvcrt.dll 
0x76f20000 - 0x76f39000  C:\Windows\SYSTEM32\sechost.dll 
0x754b0000 - 0x75551000  C:\Windows\system32\RPCRT4.dll 
0x76cf0000 - 0x76db9000  C:\Windows\system32\USER32.dll 
0x752a0000 - 0x752ee000  C:\Windows\system32\GDI32.dll 
0x757f0000 - 0x757fa000  C:\Windows\system32\LPK.dll 
0x76f40000 - 0x76fdd000  C:\Windows\system32\USP10.dll 
0x73d70000 - 0x73f0e000  C:\Windows\WinSxS\x86_microsoft.windows.common-controls_6595b64144ccf1df_6.0.7600.16661_none_420fe3fa2b8113bd\COMCTL32.dll 
0x75cc0000 - 0x75d17000  C:\Windows\system32\SHLWAPI.dll 
0x75490000 - 0x754af000  C:\Windows\system32\IMM32.DLL 
0x75800000 - 0x758cc000  C:\Windows\system32\MSCTF.dll 
0x69700000 - 0x697be000  C:\Program Files\Java\jdk1.7.0\jre\bin\msvcr100.dll 
0x65030000 - 0x65339000  C:\Program Files\Java\jdk1.7.0\jre\bin\client\jvm.dll 
0x736c0000 - 0x736f2000  C:\Windows\system32\WINMM.dll 
0x72860000 - 0x7286c000  C:\Program Files\Java\jdk1.7.0\jre\bin\verify.dll 
0x70fc0000 - 0x70fe0000  C:\Program Files\Java\jdk1.7.0\jre\bin\java.dll 
0x76f00000 - 0x76f05000  C:\Windows\system32\PSAPI.DLL 
0x6f6b0000 - 0x6f6c3000  C:\Program Files\Java\jdk1.7.0\jre\bin\zip.dll 
0x10000000 - 0x10259000  C:\Windows\System32\libspotify.dll 
0x75f80000 - 0x75fb5000  C:\Windows\system32\WS2_32.dll 
0x76f10000 - 0x76f16000  C:\Windows\system32\NSI.dll 
0x74ff0000 - 0x7510c000  C:\Windows\system32\CRYPT32.dll 
0x74f80000 - 0x74f8c000  C:\Windows\system32\MSASN1.dll 
0x74410000 - 0x74468000  C:\Windows\system32\WINHTTP.dll 
0x743c0000 - 0x7440f000  C:\Windows\system32\webio.dll 
0x74990000 - 0x749a6000  C:\Windows\system32\CRYPTSP.dll 
0x74730000 - 0x7476b000  C:\Windows\system32\rsaenh.dll 
0x74570000 - 0x74587000  C:\Windows\system32\USERENV.dll 
0x74f10000 - 0x74f1b000  C:\Windows\system32\profapi.dll 
0x74e90000 - 0x74e9c000  C:\Windows\system32\CRYPTBASE.dll 
0x6fbd0000 - 0x6fbe6000  C:\Program Files\Java\jdk1.7.0\jre\bin\net.dll 
0x74950000 - 0x7498c000  C:\Windows\system32\mswsock.dll 
0x74940000 - 0x74946000  C:\Windows\System32\wship6.dll 
0x72d60000 - 0x72d70000  C:\Windows\system32\NLAapi.dll 
0x74810000 - 0x74854000  C:\Windows\system32\DNSAPI.dll 
0x70520000 - 0x70528000  C:\Windows\System32\winrnr.dll 
0x70510000 - 0x70520000  C:\Windows\system32\napinsp.dll 
0x704f0000 - 0x70502000  C:\Windows\system32\pnrpnsp.dll 
0x74470000 - 0x74475000  C:\Windows\System32\wshtcpip.dll 
0x74480000 - 0x7449c000  C:\Windows\system32\IPHLPAPI.DLL 
0x741f0000 - 0x741f7000  C:\Windows\system32\WINNSI.DLL 
0x701d0000 - 0x701d6000  C:\Windows\system32\rasadhlp.dll 
0x72810000 - 0x72848000  C:\Windows\System32\fwpuclnt.dll 
0x72d70000 - 0x72d7f000  C:\Program Files\Java\jdk1.7.0\jre\bin\nio.dll 
0x04700000 - 0x04752000  C:\Users\nbarraille\AppData\Local\Temp\jna8472051172185323617.tmp 

VM Arguments: 
jvm_args: -Djava.library.path=C:\Windows\System32 -Dfile.encoding=Cp1252 
java_command: com.nbarraille.jspotify.main.Test 
Launcher Type: SUN_STANDARD 

Environment Variables: 
PATH=C:/Program Files/Java/jdk1.7.0/bin/../jre/bin/client;C:/Program Files/Java/jdk1.7.0/bin/../jre/bin;C:/Program Files/Java/jdk1.7.0/bin/../jre/lib/i386;C:\Windows\System32 
USERNAME=nbarraille 
OS=Windows_NT 
PROCESSOR_IDENTIFIER=x86 Family 6 Model 23 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 23 stepping 10, cmov, cx8, fxsr, mmx, sse, sse2, sse3, ssse3, sse4.1 

Memory: 4k page, physical 3624108k(899440k free), swap 7246452k(3244776k free) 

vm_info: Java HotSpot(TM) Client VM (21.0-b01) for windows-x86 JRE (1.7.0-ea-b129), built on Feb 10 2011 07:43:39 by "java_re" with unknown MS VC++:1600 

time: Tue Mar 01 22:57:31 2011 
elapsed time: 0 seconds

내가 읽은 유효하지 않은 메모리 주소를 보유하는 포인터의 사용법. 당신이 여기 있다고 생각합니까? 내 세션 인스턴스를 제대로 초기화하지 않았습니까? 이 문제를 어떻게 해결할 수 있습니까?

감사합니다.

출처

2011-03-02 nbarraille

답변

1

예, 스택 추적에 따르면 sp_session_connectionstate 함수가 NULL 포인터를 역 참조합니다.

sp_session이 (가) NULL 일 수 있습니다. C 코드가 당신 코드가 아니라면, 이것은 대부분의 경우입니다.

불행히도 JNI에 익숙하지 않아서 Java에서 C로 올바르게 포인터를 전달하는지 여부를 알 수 없습니다. 다른 사람이 아마 더 잘 알고있을 것입니다.

출처

2011-03-02 07:49:43

+0

네, 그렇게 생각했습니다. 당신은 그것이 NULL 포인터라고 어떻게 생각합니까? 문제는 sp_session 객체가 반환되는 객체가 아니라 C 메소드의 out 매개 변수에 의해 만들어지기 때문입니다. 그래서 자바에서 포인터를 생성하고 초기화 메소드에 전달해야하지만, 어떻게해야하는지에 대한 단서가 없습니다. 이 문제에 대한 새로운 질문을 드리겠습니다. 문제가 무엇인지 알게되었습니다. 고맙습니다. – nbarraille

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