[RFA/JDWP] Add startup code

[Keith Seitz <keiths at redhat dot com>]

Hi,

This patch adds just about everything needed to startup the JDWP 
backend, including VM_INIT and VM_DEATH.

Trying to run this won't really do anything interesting until some more 
event notifications are added (coming soon to a patch list near you). 
Without any of the thread suspension stuff in yet, it won't even stop 
the program... (Also coming soon to a patch list near you.)

Keith

ChangeLog
2006-08-23  Keith Seitz  <keiths@redhat.com>

        * prims.cc (remoteDebug): New global.
        (jdwpOptions): New global.
        (parse_x_arg): Add processing for "X" options "debug" and
        "runjdwp:"
        (_Jv_RunMain): If debugging, start up JDWP backend.
        Send VM_INIT and VM_DEATH when appropriate.

Index: prims.cc
===================================================================
--- prims.cc	(revision 116367)
+++ prims.cc	(working copy)
@@ -64,6 +64,10 @@
 #include <gnu/gcj/runtime/ExtensionClassLoader.h>
 #include <gnu/gcj/runtime/FinalizerThread.h>
 #include <execution.h>
+#include <gnu/classpath/jdwp/Jdwp.h>
+#include <gnu/classpath/jdwp/VMVirtualMachine.h>
+#include <gnu/classpath/jdwp/event/VmDeathEvent.h>
+#include <gnu/classpath/jdwp/event/VmInitEvent.h>
 #include <gnu/java/lang/MainThread.h>
 
 #ifdef USE_LTDL
@@ -98,6 +102,10 @@
 const char **_Jv_argv;
 int _Jv_argc;
 
+// Debugging options
+static bool remoteDebug = false;
+static char *jdwpOptions = "";
+
 // Argument support.
 int
 _Jv_GetNbArgs (void)
@@ -1138,8 +1146,19 @@
     }
   else if (! strcmp (option_string, "debug"))
     {
-      // FIXME: add JDWP/JVMDI support
+      remoteDebug = true;
     }
+  else if (! strncmp (option_string, "runjdwp:", 8))
+    {
+      if (strlen (option_string) > 8)
+	  jdwpOptions = &option_string[8];
+      else
+	{
+	  fprintf (stderr,
+		   "libgcj: argument required for JDWP options");
+	  return -1;
+	}
+    }
   else if (! strncmp (option_string, "bootclasspath:", 14))
     {
       // FIXME: add a parse_bootclasspath_arg function
@@ -1519,6 +1538,26 @@
       else
 	main_thread = new MainThread (JvNewStringUTF (name),
 				      arg_vec, is_jar);
+      _Jv_AttachCurrentThread (main_thread);
+
+      // Start JDWP
+      if (remoteDebug)
+	{
+	  using namespace gnu::classpath::jdwp;
+	  VMVirtualMachine::initialize ();
+	  Jdwp *jdwp = new Jdwp ();
+	  jdwp->setDaemon (true);
+	  jdwp->configure (JvNewStringLatin1 (jdwpOptions));
+	  jdwp->start ();
+
+	  // Wait for JDWP to initialize and start
+	  jdwp->join ();
+	}
+
+      // Send VmInit
+      gnu::classpath::jdwp::event::VmInitEvent *event;
+      event = new gnu::classpath::jdwp::event::VmInitEvent (main_thread);
+      gnu::classpath::jdwp::Jdwp::notify (event);
     }
   catch (java::lang::Throwable *t)
     {
@@ -1531,9 +1570,16 @@
       ::exit (1);
     }
 
-  _Jv_AttachCurrentThread (main_thread);
   _Jv_ThreadRun (main_thread);
 
+  // Notify deubgger of VM's death
+  if (gnu::classpath::jdwp::Jdwp::isDebugging)
+    {
+      using namespace gnu::classpath::jdwp;
+      event::VmDeathEvent *event = new event::VmDeathEvent ();
+      Jdwp::notify (event);
+    }
+
   // If we got here then something went wrong, as MainThread is not
   // supposed to terminate.
   ::exit (1);