why isn't it work?

[Coleen Phillimore - Sun Microsystems]

The two code bits look equivalent to me. If you want to debug the
Hotspot VM on windows you can build a "debug" target and use the Visual
C++ debugger. The command is something like:
cd make/windows
build
<will tell you the arguments, pick "debug">
build <arguments from above>

If you get a Java exception you can break into the Windows debugger with
the command line (when you run the java code) by giving the option (in
your case):

-XX:AbortVMOnExceptions=java.lang.IllegalThreadStateException
-XX:+UseOSErrorReporting

Both will give you a dialog box to go into the windows debugger.

The C++ interpreter is not fully tested on Windows so if there are bugs
with the version you have not modified, please let us know about them
(with suggested fixes preferably).

Thanks,
Coleen

On 04/20/09 16:24, lianshun Liu wrote:
> Hi,
> I am doing nonsense things but found some puzzles. I need your help.
> Below code snippet is quote from classFileParser.cpp.
> if (code_length > 0) {
> memcpy(m->code_base(), code_start, code_length);
> }
> I changed it like this:
> if (code_length > 0) {
> address dest = m->code_base();
> for(int i= 0; i < code_length; ++i)
> *dest++ = *code_start++;
> }
> Then I build the hotspot successfully, but when start "java -version",
> an error occured:
> E:\openjdk\build\windows-i586\bin>java
> Error occurred during initialization of VM
> java.lang.IllegalThreadStateException
> at java.lang.ThreadGroup.add(ThreadGroup.java:796)
> at java.lang.ThreadGroup.<init>(ThreadGroup.java:125)
> I wanna know why?
> Best regards
> Lianshun Liu
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