com/sun/tools/attach/VirtualMachine in OpenJDK 7 & 8

[Daniel D. Daugherty]

In OpenJDK, Oracle JDK, and Sun JDK, com.sun.tools stuff lives in tools.jar.
The Java versions from Apple put that stuff in rt.jar if I remember 
correctly.

Dan


On 4/13/12 8:05 AM, Henri Gomez wrote:
> It works !
>
> Is it an expected behaviour for OpenJDK 7/8 or only OSX version ?
>
> 2012/4/13 Daniel D. Daugherty<daniel.daugherty at oracle.com>:
>> Henri,
>>
>> Try adding $JAVA_HOME/lib/tools.jar to your classpath...
>>
>> Dan
>>
>>
>>
>> On 4/13/12 7:34 AM, Henri Gomez wrote:
>>> I tried to use CRASH (http://vietj.github.com/crash/), a nice JVM
>>> console, with OpenJDK 7 (and 8) on OSX using community build
>>> (http://code.google.com/p/openjdk-osx-build/)/
>>>
>>> Exception in thread "main" java.lang.NoClassDefFoundError:
>>> com/sun/tools/attach/VirtualMachine
>>>         at org.crsh.standalone.CRaSH.main(CRaSH.java:92)
>>>         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>>         at
>>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
>>>         at
>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>>>         at java.lang.reflect.Method.invoke(Method.java:601)
>>>         at
>>> org.crsh.cmdline.matcher.MethodMatch.doInvoke(MethodMatch.java:153)
>>>         at
>>> org.crsh.cmdline.matcher.CommandMatch.invoke(CommandMatch.java:76)
>>>         at org.crsh.standalone.CRaSH.main(CRaSH.java:237)
>>> Caused by: java.lang.ClassNotFoundException:
>>> com.sun.tools.attach.VirtualMachine
>>>         at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
>>>         at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
>>>         at java.security.AccessController.doPrivileged(Native Method)
>>>         at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
>>>         at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
>>>         at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
>>>         at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
>>>         ... 8 more
>>>
>>> Source code is here :
>>>
>>>
>>> https://github.com/vietj/crash/blob/master/shell/core/src/main/java/org/crsh/standalone/CRaSH.java
>>>
>>> Exception occurs in :
>>>
>>> VirtualMachine vm = VirtualMachine.attach("" + pid);
>>> vm.loadAgent(f.getCanonicalPath(), options);
>>>
>>> Some search in Google reported a possible missing lib attach
>>> (https://bbs.archlinux.org/viewtopic.php?id=131700)
>>>
>>> But libattach is bundled in JVM :
>>>
>>>
>>> /Library/Java/JavaVirtualMachines/1.7.0u4.jdk/Contents/Home/jre/lib/libattach.dylib
>>>
>>> Is it a known issue for OpenJDK 7 or is it specific to OSX implementation
>>> ?
>>>
>>> Cheers