[Sablevm-developer] lt_dlopen() failing mysteriously

[Archie C. <ar...@de...>]

Hi,

I'm trying to run a Java program that uses AWT stuff, which of course
requires loading the libgnu-java-awt-peer-gtk-1.0.5 native library.
Although other native libraries load fine, this one does not, and the
error seems to happen within libtool itself.

Any ideas why lt_dlopen() would fail when given a valid filename that
points to a valid shared object file?

Running 'ktrace' shows sablevm successfully opening the shared object
and reading the first page of it, but lt_dlopen() still returns NULL.

A GDB trace is below.

Thanks,
-Archie

__________________________________________________________________________
Archie Cobbs     *     Packet Design     *     http://www.packetdesign.com

(gdb) break Java_java_lang_Runtime_nativeLoad
Breakpoint 2 at 0x280d0404: file java_lang_Runtime.c, line 176.
(gdb) c
Continuing.
      ...
[verbose class: loading "java/awt/EventQueue"]
[verbose class: loading "java/awt/AWTEvent"]
[verbose class: loading "java/util/EventObject"]
[verbose class: creating "[Ljava/awt/AWTEvent;"]
[verbose class: loading "java/awt/EventDispatchThread"]
[verbose class: loading "java/lang/Thread"]
[verbose class: loading "java/lang/Runnable"]
[verbose class: loading "java/lang/ThreadGroup"]
[verbose class: loading "java/lang/InheritableThreadLocal"]
[verbose class: loading "java/lang/ThreadLocal"]
[verbose class: loading "java/util/ArrayList"]
loading gtkpeer

Breakpoint 2, Java_java_lang_Runtime_nativeLoad (_env=0x8061200, 
    this=0x919a0f0, _filename=0x919a0d0) at java_lang_Runtime.c:176
176       _svmt_JNIEnv *env = _svmf_cast_svmt_JNIEnv (_env);
(gdb) n
177       _svmt_JavaVM *vm = env->vm;
(gdb) 
178       jint result = 0;
(gdb) 
180       _svmf_resuming_java (env);
(gdb) 
184         _svmt_class_loader_info *class_loader_info =
(gdb) 
186         _svmt_native_library *native_library =
(gdb) 
189         jboolean monitor_acquired = JNI_FALSE;
(gdb) 
191         if (_svmf_enter_object_monitor
(gdb) 
199         monitor_acquired = JNI_TRUE;
(gdb) 
201         if (_svmm_galloc_utf_chars (env, _filename, filename) != JNI_OK)
(gdb) 
206         handle = lt_dlopen (filename);
(gdb) p filename
$1 = 0x8062500 "/usr/local/lib/sablevm/libgnu-java-awt-peer-gtk-1.0.5.so"
(gdb) n
0x2806ac54 in _init () from /usr/local/lib/libsablevm.so.1
(gdb) 
Single stepping until exit from function _init, 
which has no line number information.
Java_java_lang_Runtime_nativeLoad (_env=0x8061200, this=0x919a0f0, 
    _filename=0x919a0d0) at java_lang_Runtime.c:208
208         if (handle == NULL)
(gdb) 
210             _svmm_gfree_utf_chars (filename);
(gdb) p handle
$2 = 0x0
(gdb) quit
The program is running.  Exit anyway? (y or n) y
$ file /usr/local/lib/sablevm/libgnu-java-awt-peer-gtk-1.0.5.so
/usr/local/lib/sablevm/libgnu-java-awt-peer-gtk-1.0.5.so: ELF 32-bit LSB shared object, Intel 80386, version 1 (FreeBSD), not stripped
$ ls -l /usr/local/lib/sablevm/libgnu-java-awt-peer-gtk-1.0.5.so
-rwxr-xr-x  1 root  wheel  418905 Nov 13 15:45 /usr/local/lib/sablevm/libgnu-java-awt-peer-gtk-1.0.5.so*