src/share/vm/services/attachListener.cpp

*** 33,42 ****
--- 33,43 ----
  #include "runtime/java.hpp"
  #include "runtime/javaCalls.hpp"
  #include "runtime/os.hpp"
  #include "services/attachListener.hpp"
  #include "services/heapDumper.hpp"
+ #include "services/diagnosticCommand.hpp"
  
  volatile bool AttachListener::_initialized;
  
  // Implementation of "properties" command.
  //
*** 146,155 ****
--- 147,177 ----
    VMThread::execute(&op3);
  
    return JNI_OK;
  }
  
+ /**
+  * A jcmd attach operation request was received, which will now
+  * dispatch to the diagnostic commands used for serviceability functions.
+  */
+ static jint jcmd(AttachOperation* op, outputStream* out) {
+   Thread* THREAD = Thread::current();
+   // All the supplied jcmd arguments are stored as a single
+   // string (op->arg(0)). This is parsed by the Dcmd framework.
+   DCmd::parse_and_execute(out, op->arg(0), ' ', THREAD);
+   if (HAS_PENDING_EXCEPTION) {
+     java_lang_Throwable::print(PENDING_EXCEPTION, out);
+     CLEAR_PENDING_EXCEPTION;
+     // The exception has been printed on the output stream
+     // If the JVM returns JNI_ERR, the attachAPI throws a generic I/O
+     // exception and the content of the output stream is not processed.
+     // By returning JNI_OK, the exception will be displayed on the client side
+     return JNI_OK;
+   }
+   return JNI_OK;
+ }
+ 
  #ifndef SERVICES_KERNEL   // Heap dumping not supported
  // Implementation of "dumpheap" command.
  //
  // Input arguments :-
  //   arg0: Name of the dump file
*** 364,373 ****
--- 386,396 ----
    { "properties",       get_system_properties },
    { "threaddump",       thread_dump },
    { "inspectheap",      heap_inspection },
    { "setflag",          set_flag },
    { "printflag",        print_flag },
+   { "jcmd",             jcmd },
    { NULL,               NULL }
  };