Java on Windows will only generate a crash dump, when running with
-XX:+ShowMessageErrorOnBox. Any other windows application however, will
create a crash dump upon each and every crash.

Running Java with -XX:+ShowMessageErrorOnBox does yield a windows dump
file, however it suppresses the creation of an hs_err_pid.log file. On
Unix (Solaris and Linux), both a crash dump (core file) and an hs_err_pid.log
file are generated at one time.

So, the proposal is:
Is it possible to get both crash dump and hs_err_pid.log file on Windows
platforms at one time (possibly without using -XX:+ShowMessageErrorOnBox).
The crash dump file will be generated depending on Dr Watson being installed.


Here is an example: Please find attached a complete example.

It is supposed than Dr Watson is installed.

1. native testcase
------------------
1.1 Testcase
------------
% more Hello.c

#include <stdio.h>
int main() {
  char str1[]="Sample string";
  char * str2= NULL;
  strcpy(str2, str1);
    return;
}
%

1.2. run native testcase
------------------------
It will crash and generate a crash dump.
Compile with Borland's bcc32 (for example):

C:> C:\bcc32 -IC:\bcc55\include -LC:\bcc55\include -ehello.exe hello.c
Borland C++ 5.5.1 for Win32 Copyright (c) 1993, 2000 Borland
Hello.c:
Warning W8065 Hello.c 10: Call to function 'strcpy' with no prototype in function main
Turbo Incremental Link 5.00 Copyright (c) 1997, 2000 Borland

C:>


C:>hello

[ hello.exe has generated errors and will be closed by Windows.
  You will need to restart the program.

  An error log is being created.

 [OK]
]

drwtsn32.log and user.dmp has been created.



C:>more drwtsn32.log

Microsoft (R) Windows 2000 (TM) Version 5.00 DrWtsn32
Copyright (C) 1985-1999 Microsoft Corp. All rights reserved.



Application exception occurred:
        App: (pid=856)
        When: 2/20/2004 @ 13:37:44.542
        Exception number: c0000005 (access violation)

*----> System Information <----*
        Computer Name: SUN-DE9D5C19522
        User Name: Administrator
        Number of Processors: 1
        Processor Type: x86 Family 15 Model 2 Stepping 7
        Windows 2000 Version: 5.0
        Current Build: 2195
        Service Pack: 3
        Current Type: Uniprocessor Free
        Registered Organization: Sun Microsystems
        Registered Owner: Sun Microsystems

*----> Task List <----*
[ ... ]
 856 hello.exe
C:>


3. Try a JNI testcase based on the above example
------------------------------------------------
3.1 Compile
-----------
C:>make

C:>set JAVA_HOME=C:\j2sdk1.4.2

C:>set PATH=C:\bcc55\bin;C:\bcc55\bin;C:\bcc55\bin;C:\WINNT\system32;C:\WINNT;C:\WINNT\System32\Wbem

C:>set INCLUDES=-IC:\bcc55\include -IC:\j2sdk1.4.2\include -IC:\j2sdk1.4.2\include\win32

C:>C:\j2sdk1.4.2\bin\javac HelloWorld.java

C:>C:\j2sdk1.4.2\bin\javah -jni HelloWorld

C:>bcc32 -tWD -IC:\bcc55\include -IC:\j2sdk1.4.2\include -IC:\j2sdk1.4.2\include\win32 -LC:\bcc55\lib HelloWorldImp.c
Borland C++ 5.5.1 for Win32 Copyright (c) 1993, 2000 Borland
HelloWorldImp.c:
Warning W8065 HelloWorldImp.c 13: Call to function 'strcpy' with no prototype in function Java_HelloWorld_displayHelloWorld
Warning W8057 HelloWorldImp.c 15: Parameter 'env' is never used in function Java_HelloWorld_displayHelloWorld
Warning W8057 HelloWorldImp.c 15: Parameter 'obj' is never used in function Java_HelloWorld_displayHelloWorld
Turbo Incremental Link 5.00 Copyright (c) 1997, 2000 Borland

C:>


3.2 Run without -XX:+ShowMessageBoxOnError
------------------------------------------

C:>c:\j2sdk1.4.2\bin\java HelloWorld

An unexpected exception has been detected in native code outside the VM.
Unexpected Signal : EXCEPTION_ACCESS_VIOLATION (0xc0000005) occurred at PC=0x182
722BA
Function=Java_HelloWorld_displayHelloWorld+0x1082
Library=C:\test\HelloWorldImp.dll
[ ... ]

 Please note that *no* crash dump file is be created.



3.3 Run with -XX:+ShowMessageBoxOnError
---------------------------------------

C:>c:\j2sdk1.4.2\bin\java -XX:+ShowMessageBoxOnError HelloWorld

[ An error has occurred. Do you want to debug the problem ?
  [Yes] [No]
]

 Choose "No" and you will get an hs_err_pid.log file.

 Choose "Yes" and you will get:

[ java.exe has generated errors and will be closed by Windows.
  You will need to restart the program.

  An error log is being created.

 [OK]
]

 Both a crash dump file and a drwtsn32.log file will be generated, but *no*
 hs_err_pid.log file.