Re: [Sablevm-developer] native libs

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I have the same problem on both Debian/PPC and Debian/x86.  However, the
x86 version is the older 1.0.1 version installed in the sable lab.  The P=
PC version is based on 1.0.5 with my PPC patch.  I will try on 1.0.5 on x=
86 tonight.

David

On Mon, Jan 20, 2003 at 04:21:01PM -0500, Prof. Etienne M. Gagnon wrote:
> OK.  I'm back!  :-)
>=20
> I'll look at this tomorrow.  You're on Debian/x86, right?
>=20
> Etienne
>=20
> David Paul BELANGER wrote:
> >Hi,
> >
> >I'm getting a segmentation fault when trying to load a native library.
> >The system native library (libjava-lang, libjava-io) get properly load=
ed
> >but when it comes to mine, it seems that the pointer passed to the
> >memory allocator is null.  My library seems to get properly loaded (th=
e
> >handle is non-null).
> >
> >I have included some gdb output and a simple Hello program that cause
> >the error.
> >
> >Thanks,
> >David
> >
> >
> >---
> >
> >David B=E9langer
> >Graduate Student
> >School of Computer Science
> >McGill University
> >Office: MC226
> >
> >Web page:   http://www.cs.mcgill.ca/~dbelan2/
> >Public key: http://www.cs.mcgill.ca/~dbelan2/public_key.txt
> >
> >
> >
> >----------------------------------------------------------------------=
--
> >
> >Program received signal SIGSEGV, Segmentation fault.
> >[Switching to Thread 1024 (LWP 10068)]
> >0x40029cbe in _svmf_cl_alloc (env=3D0x804d548, class_loader_info=3D0x8=
0636b8,=20
> >    size=3D12, ptr=3D0x0) at class_loader_memory_manager.c:139
> >139     class_loader_memory_manager.c: No such file or directory.
> >        in class_loader_memory_manager.c
> >(gdb) backtrace
> >#0  0x40029cbe in _svmf_cl_alloc (env=3D0x804d548,=20
> >class_loader_info=3D0x80636b8, size=3D12, ptr=3D0x0) at=20
> >    class_loader_memory_manager.c:139
> >#1  0x40029dd4 in _svmf_cl_zalloc (env=3D0x804d548,=20
> >class_loader_info=3D0x80636b8, size=3D12, ptr=3D0x0) at=20
> >    class_loader_memory_manager.c:181
> >#2  0x4002aab2 in _svmh_cl_zalloc_native_library (env=3D0x804d548,=20
> >    class_loader_info=3D0x80636b8, ptr=3D0x0) at cl_alloc.c:585
> >#3  0x400890ea in Java_java_lang_Runtime_nativeLoad (_env=3D0x804d548,=
=20
> >    this=3D0x8060028, _filename=3D0x8060610) at java_lang_Runtime.c:24=
6
> >#4  0x400df6ff in ffi_call_SYSV () from /usr/lib/libffi.so.2
> >#5  0x400df41a in ffi_call () from /usr/lib/libffi.so.2
> >#6  0x400334f8 in _svmf_invoke_native_nonstatic (env=3D0x804d548) at=20
> >native.c:1171
> >#7  0x40071b53 in _svmf_interpreter (_env=3D0x804d548)
> >    at instructions_switch.c:9839
> >#8  0x40027270 in _svmh_invoke_specific_static_clinit (env=3D0x804d548=
,=20
> >    method=3D0x4145046c) at method_invoke.c:5061
> >#9  0x40088c9e in Java_java_lang_Class_step8 (_env=3D0x804d548,=20
> >_class=3D0x805fd98, vmData=3D0x80607a0) at java_lang_Class.c:741
> >#10 0x400df6ff in ffi_call_SYSV () from /usr/lib/libffi.so.2
> >#11 0x400df41a in ffi_call () from /usr/lib/libffi.so.2
> >#12 0x40032bf8 in _svmf_invoke_native_static (env=3D0x804d548) at=20
> >native.c:834
> >#13 0x40071aa4 in _svmf_interpreter (_env=3D0x804d548)
> >    at instructions_switch.c:9791
> >#14 0x4001fbaa in _svmh_invoke_nonvirtual_jlclass_initialize=20
> >(env=3D0x804d548, this=3D0x8065b08, param_1=3D1) at method_invoke.c:35=
2
> >#15 0x4003dcaa in _svmf_class_initialization (env=3D0x804d548,=20
> >class=3D0x41450008)
> >    at initialization.c:24
> >#16 0x4008c6d5 in Java_java_lang_VirtualMachine_invokeMain=20
> >(_env=3D0x804d548, _class=3D0x805fda8, mainClass=3D0x805fdb8, args=3D0=
x805fdc8)
> >    at java_lang_VirtualMachine.c:47
> >#17 0x400df6ff in ffi_call_SYSV () from /usr/lib/libffi.so.2
> >#18 0x400df41a in ffi_call () from /usr/lib/libffi.so.2
> >#19 0x40032bf8 in _svmf_invoke_native_static (env=3D0x804d548) at=20
> >native.c:834
> >#20 0x40071aa4 in _svmf_interpreter (_env=3D0x804d548)
> >    at instructions_switch.c:9791
> >#21 0x40057a60 in CallStaticVoidMethod (_env=3D0x804d548, cls=3D0x805f=
198,=20
> >    methodID=3D0x41250818) at native_interface.c:14894
> >#22 0x0804aa4d in main (argc=3D2, argv=3D0xbffff8e4) at sablevm.c:1434
> >(gdb)=20
> >
> >
> >----------------------------------------------------------------------=
--
> >
> >
> >public class Hello {
> >
> >  static {
> >    System.loadLibrary("hello");
> >  }
> >
> >  private static native void printHello();
> >
> >
> >  public static void main(String[] args) {
> >    printHello();
> >  }
> >
> >}
> >
> >
> >----------------------------------------------------------------------=
--
> >
> >#include "Hello.h"
> >
> >#include <stdio.h>
> >
> >JNIEXPORT void JNICALL Java_Hello_printHello
> >(JNIEnv *env, jclass c) {
> >  printf("Hello!\n");
> >}
> >
> >
> >
> >----------------------------------------------------------------------=
--
> >
> >/* DO NOT EDIT THIS FILE - it is machine generated */
> >#include <jni.h>
> >/* Header for class Hello */
> >
> >#ifndef _Included_Hello
> >#define _Included_Hello
> >#ifdef __cplusplus
> >extern "C" {
> >#endif
> >/*
> > * Class:     Hello
> > * Method:    printHello
> > * Signature: ()V
> > */
> >JNIEXPORT void JNICALL Java_Hello_printHello
> >  (JNIEnv *, jclass);
> >
> >#ifdef __cplusplus
> >}
> >#endif
> >#endif
> >
> >
> >----------------------------------------------------------------------=
--
> >
> >all:
> >	libtool gcc -c -g -o hello.lo -I../../../../include Hello.c
> >	libtool gcc -o libhello.la -g hello.lo -rpath `pwd`
> >	libtool install -c libhello.la `pwd`/libhello.la
>=20
> --=20
> Etienne M. Gagnon, Ph.D.             http://www.info.uqam.ca/~egagnon/
> SableVM:                                       http://www.sablevm.org/
> SableCC:                                       http://www.sablecc.org/
>=20
>=20
>=20
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--=20

---

David B=E9langer
Graduate Student
School of Computer Science
McGill University
Office: MC226

Web page:   http://www.cs.mcgill.ca/~dbelan2/
Public key: http://www.cs.mcgill.ca/~dbelan2/public_key.txt