The current implementation of java.lang.Process.destroy() is incorrect.
Now it is possible to call destroy and cause some other process to be terminated.

Current java.lang.Process implementation is:

--- src/solaris/native/java/lang/UNIXProcess_md.c ---
JNIEXPORT void JNICALL
Java_java_lang_UNIXProcess_destroyProcess(JNIEnv *env, jobject junk, jint pid)
{
   kill(pid, SIGTERM);
}
--- src/solaris/native/java/lang/UNIXProcess_md.c ---


--- src/solaris/classes/java/lang/UNIXProcess.java.linux ---
   public void destroy() {
       destroyProcess(pid);
       try {
           stdin_stream.close();
           stdout_stream.close();
           stderr_stream.close();
       } catch (IOException e) {
           // ignore
       }
   }
--- src/solaris/classes/java/lang/UNIXProcess.java.linux ---

As result, the following situation is possible:

Thread1                     |  Thread2
----------------------------------------------------------------
createProcess               |
process.pid=X               |

process.waitFor()           |
process has been terminated |
                            |
                            |
                            |  createProcess
                            |  process.pid=X  (I know that OS is supposed to avoid assigning same pid for some time but ...)
process.destroy()           |
-> kill(X, SIGTERM)         |
                            |  got signal and terminated with -1 (according to Java_java_lang_UNIXProcess_waitForProcessExit)
                            |
----------------------------------------------------------------


It would be better if 'destroyProcess(pid)' will be called only in case the process has not been terminated yet.

Something like:
   public void destroy() {
       synchronized(this)
       {
           if (!hasExited)
               destroyProcess(pid);
       }

       try {
           stdin_stream.close();
           stdout_stream.close();
           stderr_stream.close();
       } catch (IOException e) {
           // ignore
       }
   }


I will attach the test case after it will be ready.