Exception 0xC0000005 from JNI_CreateJavaVM (jvm.dll)

7

I am initializing the Java VM using the following C++ code. JNI_CreateJavaVM throws a 0xC0000005 exception but succeeds none the less if I ignore it.

'Jni.exe' (Win32): Loaded 'C:\Tools\Java\Jdk8.77x86\jre\bin\zip.dll'. Cannot find or open the PDB file.

Exception thrown at 0x02900282 in Jni.exe: 0xC0000005: Access violation reading location 0x00000000.

'Jni.exe' (Win32): Loaded 'C:\Windows\SysWOW64\shell32.dll'. Cannot find or open the PDB file.

Am I forgetting to set or do something or is this 'normal' behaviour?

#include <array>
#include "jni.h"

int main( int argc, char const* args[])
{
    JavaVM* jvm;
    JNIEnv* env;

    std::array<JavaVMOption,1> options;
    options[0].optionString = "-Djava.class.path=C:/Users/Thomas/Documents/Visual Studio 2015/Projects/Jni/x64/Debug";
    options[0].extraInfo = nullptr;

    JavaVMInitArgs vm_args;
    vm_args.version = JNI_VERSION_1_8;
    vm_args.options = options.data();
    vm_args.nOptions = options.size();
    vm_args.ignoreUnrecognized = false;

    auto rc = JNI_CreateJavaVM( &jvm, reinterpret_cast<void**>(&env), &vm_args );
    if( rc == JNI_OK )
    {
        jvm->DestroyJavaVM();        
    }
}

This happens for both Release and Debug and for both x86 and x64 builds.

java
visual-studio-2015
jvm
jni
asked on Stack Overflow Mar 27, 2016 by Thomas • edited Mar 28, 2016 by apangin

2 Answers

12

JVM actively uses OS signals (or exceptions in Windows terminology) for its own purposes:

  • for implicit null pointer checks and stack overflow checks;
  • for safepoint polling;
  • for remote memory barriers;
  • etc.

SEGV (or exception 0xC0000005) is also generated intentionally on JVM startup to verify certain CPU/OS features. Some OSes or hypervisors had a bug that AVX registers are not restored after signal processing. Therefore, JVM needs to check whether this is the case (the source). So it generates an exception by writing to zero address and then handles it.

This is what happens in your case. And yes, it is normal.

answered on Stack Overflow Mar 28, 2016 by apangin
1

This is normal, like @apangin said. If you want to switch all 0xC0000005 exceptions off in VisualStudio (2017), you can do that:

  1. Exception Settings - Ctrl+Alt+E
  2. Remove tick from: "0xc0000005 Access violation" under Win32 Exceptions
answered on Stack Overflow Dec 6, 2018 by Balázs Somorjai • edited Dec 15, 2018 by mature

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