It appears as though my X server is in a weird state, but nevertheless...

Trying to run *any* applet with any 1.1 or 1.2 appletviewer causes a core dump.
From the code path in dbx, it appears that the "loadFont()" function in
src/solaris/native/sun/awt/awt_font.c is returning NULL, which means that
the XLoadQueryFont is failing for even the fallback default font name of
-*-helvetica-*-*-*-*-*-*-12-*-*-*-iso8859-1

Below is a sample core dump output, followed by some interaction with dbx
in the same situation. The violation occurs on line 479 of multi_font.c
(in the Aug 21 JDK build); it is trying to dereference the return value of
a loadFont() call, which return NULL.

This shouldn't cause a core dump, so the return value from loadFont() should
be checked.

appletviewer http://jse.east/~jones/java/appletinner/index.html
SIGSEGV 11* segmentation violation
    si_signo [11]: SIGSEGV 11* segmentation violation
    si_errno [0]: Error 0
    si_code [1]: SEGV_MAPERR [addr: 0x14]
 
        stackbase=F0000000, stackpointer=EFFFE1A0
 
Full thread dump:
    "thread applet-AppletInner" (TID:0xee7062c8, sys_thread_t:0x3af028, state:CW
) prio=4
        at java.lang.Object.wait(Native Method)
        at java.lang.Object.wait(Object.java:309)
        at sun.applet.AppletPanel.getNextEvent(AppletPanel.java:216)
        at sun.applet.AppletPanel.run(AppletPanel.java:240)
        at java.lang.Thread.run(Thread.java:465)
    "AWT-Motif" (TID:0xee70b4b8, sys_thread_t:0x38cef0, state:MW) prio=5
        at sun.awt.motif.MToolkit.run(Native Method)
        at java.lang.Thread.run(Thread.java:465)
    "AWT-Input" (TID:0xee70b380, sys_thread_t:0x38cde8, state:MW) prio=5
        at sun.awt.motif.InputThread.run(Native Method)
    "AWT-EventQueue-0" (TID:0xee70b338, sys_thread_t:0x386f58, state:CW) prio=5
        at java.lang.Object.wait(Native Method)
        at java.lang.Object.wait(Object.java:309)
        at java.awt.EventQueue.getNextEvent(EventQueue.java:114)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:44)
    "Keep-Alive-Timer:jse.east" (TID:0xee70c758, sys_thread_t:0xc6608, state:CW)
 prio=8
        at java.lang.Thread.sleep(Native Method)
        at sun.net.www.http.ClientVector.run(KeepAliveCache.java:200)
        at java.lang.Thread.run(Thread.java:465)
    "Finalizer" (TID:0xee700310, sys_thread_t:0x45ad0, state:CW) prio=1
        at java.lang.Object.wait(Native Method)
        at java.lang.Ref$Queue.remove(Ref.java:92)
        at java.lang.Ref$Queue.remove(Ref.java:99)
        at java.lang.Finalizer$FinalizerThread.run(Finalizer.java:130)
    "Ref handler" (TID:0xee7003c0, sys_thread_t:0x429a8, state:CW) prio=10
        at java.lang.Object.wait(Native Method)
        at java.lang.Object.wait(Object.java:309)
        at java.lang.Ref$RefHandler.run(Ref.java:123)
    "Async Garbage Collector" (TID:0xee700448, sys_thread_t:0x3d868, state:CW) p
rio=1
    "Idle thread" (TID:0xee7001d0, sys_thread_t:0x3c380, state:R) prio=0
    "Clock" (TID:0xee700058, sys_thread_t:0x62410, state:CW) prio=12
    "main" (TID:0xee700088, sys_thread_t:0x209f8, state:R) prio=5 *current threa
d*
        at sun.awt.motif.MComponentPeer.setFont(Native Method)
        at sun.awt.motif.MFramePeer.<init>(MFramePeer.java:63)
        at sun.awt.motif.MToolkit.createFrame(MToolkit.java:115)
        at java.awt.Frame.addNotify(Frame.java:195)
        at java.awt.Window.pack(Window.java:124)
        at sun.applet.AppletViewer.<init>(AppletViewer.java:196)
        at sun.applet.StdAppletViewerFactory.createAppletViewer(AppletViewer.jav
a:81)
        at sun.applet.AppletViewer.parse(AppletViewer.java:941)
        at sun.applet.AppletViewer.parse(AppletViewer.java:907)
        at sun.applet.AppletViewer.main(AppletViewer.java:1084)
Monitor Cache Dump:
    sun.awt.motif.MToolkit@EE70B8F8/EE796098: owner "main" (0x209f8, 1 entry)
        Waiting to enter:
            "AWT-Input"
            "AWT-Motif"
Registered Monitor Dump:
    utf8 hash table: <unowned>
    JNI pinning lock: <unowned>
    JNI global reference lock: <unowned>
    BinClass lock: <unowned>
    Class linking lock: <unowned>
    Code rewrite lock: <unowned>
    Heap lock: <unowned>
    Monitor IO lock: <unowned>
    Child death monitor: <unowned>
    Event monitor: <unowned>
    I/O monitor: <unowned>
    Alarm monitor: <unowned>
        Waiting to be notified:
            "Clock"
    Sbrk lock: <unowned>
    Monitor cache expansion lock: <unowned>
    Thread queue lock: <unowned>
    Monitor registry: owner "main" (0x209f8, 1 entry)
Thread Alarm Q:
    sys_thread_t 0x3d868 [Timeout in 680 ms]
    sys_thread_t 0xc6608 [Timeout in 2163 ms]
Abort
 
 
 
signal SEGV (no mapping at the fault address) in awtJNI_GetFontList at line 479
in file "multi_font.c"
  479 if (xf->min_byte1 == 0 && xf->max_byte1 == 0) {
(dbx) print fdata->flist[i].xlfd
fdata->flist[i].xlfd = 0x3711c8 "-*-helvetica-*-*-*-*-*-*-12-*-*-*-iso8859-1"
(dbx) where
=>[1] awtJNI_GetFontList(env = 0x20a20, font = 0x23ebc), line 479 in "multi_font
.c"
  [2] Java_sun_awt_motif_MComponentPeer_setFont(env = 0x20a20, this = 0xefffed6c
, f = 0x23ebc), line 554 in "awt_Component.c"
  [3] invoke_O_V(o = 0xee30ebd8, mb = 0x3796e8, args_size = 2, ee = 0x20a20), li
ne 311 in "invokers.c"
  [4] invokeLazyNativeMethod(o = 0xee30ebd8, mb = 0x3796e8, args_size = 2, ee =
0x20a20), line 496 in "classruntime.c"
  [5] ExecuteJava_C(initial_pc = 0xeffff530 "\x30000059", ee = 0x20a20), line 14
47 in "executeJava.c"
  [6] do_execute_java_method_vararg(ee = 0x20a20, obj = 0xee3050b8, method_name
= 0x56c18 "main", method_signature = 0x59f90 "([Ljava/lang/String;)V", mb = 0x69
b10, isStaticCall = TRUE, args = 0xeffff640, otherBits = (nil), shortFloats = FA
LSE), line 574 in "interpreter.c"
  [7] do_execute_java_method(ee = 0x20a20, obj = 0xee3050b8, method_name = (nil)
, signature = (nil), mb = 0x69b10, isStaticCall = TRUE, ...), line 406 in "inter
preter.c"
  [8] java_main(argc = 0, argv = 0xeffff86c), line 713 in "javai.c"
  [9] main(argc = 3, argv = 0xeffff864, envp = 0xeffff874), line 25 in "java.c"
(dbx) print xf
xf = (nil)
(dbx) where
=>[1] awtJNI_GetFontList(env = 0x20a20, font = 0x23ebc), line 479 in "multi_font
.c"
  [2] Java_sun_awt_motif_MComponentPeer_setFont(env = 0x20a20, this = 0xefffed6c
, f = 0x23ebc), line 554 in "awt_Component.c"
  [3] invoke_O_V(o = 0xee30ebd8, mb = 0x3796e8, args_size = 2, ee = 0x20a20), li
ne 311 in "invokers.c"
  [4] invokeLazyNativeMethod(o = 0xee30ebd8, mb = 0x3796e8, args_size = 2, ee =
0x20a20), line 496 in "classruntime.c"
  [5] ExecuteJava_C(initial_pc = 0xeffff530 "\x30000059", ee = 0x20a20), line 14
47 in "executeJava.c"
  [6] do_execute_java_method_vararg(ee = 0x20a20, obj = 0xee3050b8, method_name
= 0x56c18 "main", method_signature = 0x59f90 "([Ljava/lang/String;)V", mb = 0x69
b10, isStaticCall = TRUE, args = 0xeffff640, otherBits = (nil), shortFloats = FA
LSE), line 574 in "interpreter.c"
  [7] do_execute_java_method(ee = 0x20a20, obj = 0xee3050b8, method_name = (nil)
, signature = (nil), mb = 0x69b10, isStaticCall = TRUE, ...), line 406 in "inter
preter.c"
  [8] java_main(argc = 0, argv = 0xeffff86c), line 713 in "javai.c"
  [9] main(argc = 3, argv = 0xeffff864, envp = 0xeffff874), line 25 in "java.c"
(dbx)

eric.hawkes@eng 1997-10-17 Accepted the bug. After looking at the code, it
appears that a fix may exist.