Perl - c - java munmap_chunk(): invalid pointer

Question

I am trying to use the JNI invocation interface from within some C code which in turn is invoked from Perl (Perl -> C -> Java).
The problem is, when the Perl process ends, i end up this:
*** glibc detected *** /usr/bin/perl: munmap_chunk(): invalid pointer: 0xb68d3880 ***
======= Backtrace: =========
/lib/i686/cmov/libc.so.6(+0x6b321)[0xb7e20321]
/lib/i686/cmov/libc.so.6(+0x6c59e)[0xb7e2159e]
/usr/bin/perl(perl_destruct+0x1290)[0x807dd30]
/usr/bin/perl(main+0x95)[0x80642a5]
/lib/i686/cmov/libc.so.6(__libc_start_main+0xe6)[0xb7dcbc76]
/usr/bin/perl[0x8064171]
I am simply invoking this function once, which creates the JVM and later invokes DestroyJavaVM...
static void test( void ) {
    JavaVM *jvm;
    JNIEnv *env;
    JavaVMInitArgs vm_args;
    JavaVMOption options[ 1 ];
    options[ 0 ].optionString = "-Djava.class.path=/tmp";
    vm_args.version = JNI_VERSION_1_6;
    vm_args.nOptions = 1;
    vm_args.options = options;
    vm_args.ignoreUnrecognized = 0;
    int ret = JNI_CreateJavaVM( &jvm, ( void** ) &env, &vm_args );
    if(ret < 0)
        printf("\nUnable to Launch JVM\n");
    else {
        if( (*env)->ExceptionOccurred( env ) )
           (*env)->ExceptionDescribe( env );
        (*jvm)->DestroyJavaVM( jvm );
}Can anyone offer me any clues as to what may be happening here? I am guessing that DestroyJavaVM is not freeing the resources allocated by the JVM and this interferes with garbage collection in Perl...

Answer 1

I am guessing that DestroyJavaVM is not freeing the resources allocated by the JVMThat definitely won't be it, as DestroyJavaVM() currently does nothing.
I would take this in three steps:
1. write a C main() that starts and stops the JVM correctly
2. write a C test() that does nothing except get called by Perl correctly
3. Have the test() start the JVM using the same code as at (1).
I would also have a look at how you are building the C exe. In my experience on Windows, sharing the C RTL doesn't work in conjunction with the JVM. Some years ago I was a whizz at fixing this sort of thing but these days I just use a static library ;-)