Seized swarm application.

[William S. Shu]

I have two classes: person and mosquito which have more or less the same
methods.  For the time-being, I use a single file which is conditionally
compiled for mosquito and person.  (It is originally written with person in
mind, so I use #define to convert the Person class -- whereever used -- to a
Mosquito class.  The technique has worked with other closely related classes
used in this very simulation.)

The trouble is that the program starts loading but continues by thrashing
(busy but doing nothing).  It seems to have a lot of disk activity with no
other visible action for indefinite periods -- left it for over 30 minutes
once.

However, the program runs well without the methods (appart from the step
method, which does nothing.  step is needed for scheduling the mosquito
swarm).  I thought the #define could be the problem.  So I removed them and
copied manually all the needed methods, but the same thing happened.

Under GDB, the offending level seems to be:
66000000:/APPS/SWARM-1.3.1/PACKAGES/SWARM/BIN/CYGTCL80.DLL

A curious thing is that even the Mosquito methods (all but one) used to be
compiled and run with the Person methods with no problem, and still do.
What could be wrong?  am I reaching some internal limit on possible (total)
methods, say?


I use Swarm-1.3.1, GNU gdb 4.16-B19,  cygwin B19 in a Windows 95
environment.
Excerpts of program behaviour under GDB is shown below.

Thanks a lot

William.


Program behaviour:

Current directory is c:/u/mosq/proto/
GNU gdb 4.16-B19
Copyright 1997 Free Software Foundation, Inc.
GDB is free software [deleted GDB info]...
(gdb) break 64
Breakpoint 1 at 0x403a21: file PersonMain.m, line 64.
(gdb) run
Starting program: /u/mosq/proto/persons.exe
7fe90000:/WINDOWS/SYSTEM/COMDLG32.DLL
66300000:/APPS/SWARM-1.3.1/PACKAGES/SWARM/BIN/CYGTK80.DLL
bff30000:/WINDOWS/SYSTEM/GDI32.DLL
bff60000:/WINDOWS/SYSTEM/USER32.DLL
10000000:/APPS/SWARM-1.3.1/PACKAGES/SWARM/BIN/CYGWINB19.DLL
bff70000:/WINDOWS/SYSTEM/KERNEL32.DLL
bfed0000:/WINDOWS/SYSTEM/ADVAPI32.DLL
66000000:/APPS/SWARM-1.3.1/PACKAGES/SWARM/BIN/CYGTCL80.DLL
7c6c0000:/WINDOWS/SYSTEM/WSOCK32.DLL
bfb50000:/WINDOWS/SYSTEM/SHLWAPI.DLL
70200000:/WINDOWS/SYSTEM/WININET.DLL

Breakpoint 1, main (argc=1, argv=0x28dfc8c) at PersonMain.m:66
(gdb) cont
Continuing.

**** program thrashes (makes hard disk access) until killed. ****

Debugger exited abnormally with code 255






Current directory is c:/u/mosq/proto/
GNU gdb 4.16-B19
Copyright 1997 Free Software Foundation, Inc.
GDB is free software [deleted GDB info]...
(gdb) break 64
Breakpoint 1 at 0x403afb: file PersonMain.m, line 64.
(gdb) run
Starting program: /u/mosq/proto/persons.exe
7fe90000:/WINDOWS/SYSTEM/COMDLG32.DLL
66300000:/APPS/SWARM-1.3.1/PACKAGES/SWARM/BIN/CYGTK80.DLL
bff30000:/WINDOWS/SYSTEM/GDI32.DLL
bff60000:/WINDOWS/SYSTEM/USER32.DLL
10000000:/APPS/SWARM-1.3.1/PACKAGES/SWARM/BIN/CYGWINB19.DLL
bff70000:/WINDOWS/SYSTEM/KERNEL32.DLL
bfed0000:/WINDOWS/SYSTEM/ADVAPI32.DLL
66000000:/APPS/SWARM-1.3.1/PACKAGES/SWARM/BIN/CYGTCL80.DLL


**** program thrashes (makes hard disk access) until killed. ****

7c6c0000:/WINDOWS/SYSTEM/WSOCK32.DLL
bfb50000:/WINDOWS/SYSTEM/SHLWAPI.DLL
70200000:/WINDOWS/SYSTEM/WININET.DLL

Program exited with code 0201000.
(gdb) where
No stack.
(gdb) quit

Debugger finished





**** program WITHOUT the methods run now and is OKAY ****

Current directory is c:/u/mosq/proto/
GNU gdb 4.16-B19
Copyright 1997 Free Software Foundation, Inc.
GDB is free software [deleted GDB info]...
(gdb) break 64
Breakpoint 1 at 0x403afb: file PersonMain.m, line 64.
(gdb) run
Starting program: /u/mosq/proto/persons.exe
7fe90000:/WINDOWS/SYSTEM/COMDLG32.DLL
66300000:/APPS/SWARM-1.3.1/PACKAGES/SWARM/BIN/CYGTK80.DLL
bff30000:/WINDOWS/SYSTEM/GDI32.DLL
bff60000:/WINDOWS/SYSTEM/USER32.DLL
10000000:/APPS/SWARM-1.3.1/PACKAGES/SWARM/BIN/CYGWINB19.DLL
bff70000:/WINDOWS/SYSTEM/KERNEL32.DLL
bfed0000:/WINDOWS/SYSTEM/ADVAPI32.DLL
66000000:/APPS/SWARM-1.3.1/PACKAGES/SWARM/BIN/CYGTCL80.DLL
7c6c0000:/WINDOWS/SYSTEM/WSOCK32.DLL
bfb50000:/WINDOWS/SYSTEM/SHLWAPI.DLL
70200000:/WINDOWS/SYSTEM/WININET.DLL

Program exited normally.



**** program *WITH* the methods run now and is *NOT* okay ****

(gdb) run
Starting program: /u/mosq/proto/persons.exe
COMDLG32.DLL (symbols previously loaded)
CYGTK80.DLL (symbols previously loaded)
GDI32.DLL (symbols previously loaded)
USER32.DLL (symbols previously loaded)
CYGWINB19.DLL (symbols previously loaded)
KERNEL32.DLL (symbols previously loaded)
ADVAPI32.DLL (symbols previously loaded)
CYGTCL80.DLL (symbols previously loaded)
WSOCK32.DLL (symbols previously loaded)
SHLWAPI.DLL (symbols previously loaded)
WININET.DLL (symbols previously loaded)

Program exited with code 0201000.
(gdb) WSOCK32.DLL (symbols previously loaded)
Undefined command: "WSOCK32".  Try "help".
(gdb) quit

Debugger finished




**** program WITHOUT the methods run now and is OKAY ****

Current directory is c:/u/mosq/proto/
GNU gdb 4.16-B19
Copyright 1997 Free Software Foundation, Inc.
GDB is free software[deleted GDB info]...
(gdb) break 64
Breakpoint 1 at 0x403afb: file PersonMain.m, line 64.
(gdb) run
Starting program: /u/mosq/proto/persons.exe
cont
7fe90000:/WINDOWS/SYSTEM/COMDLG32.DLL
66300000:/APPS/SWARM-1.3.1/PACKAGES/SWARM/BIN/CYGTK80.DLL
bff30000:/WINDOWS/SYSTEM/GDI32.DLL
bff60000:/WINDOWS/SYSTEM/USER32.DLL
10000000:/APPS/SWARM-1.3.1/PACKAGES/SWARM/BIN/CYGWINB19.DLL
bff70000:/WINDOWS/SYSTEM/KERNEL32.DLL
bfed0000:/WINDOWS/SYSTEM/ADVAPI32.DLL
66000000:/APPS/SWARM-1.3.1/PACKAGES/SWARM/BIN/CYGTCL80.DLL
7c6c0000:/WINDOWS/SYSTEM/WSOCK32.DLL
bfb50000:/WINDOWS/SYSTEM/SHLWAPI.DLL
70200000:/WINDOWS/SYSTEM/WININET.DLL

Breakpoint 1, main (argc=1, argv=0x28dfc8c) at PersonMain.m:65
(gdb) Continuing.
.... [deleted material] ...



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