[RFA] JDWP ThreadStatus

[Kyle Galloway <kgallowa at redhat dot com>]

This patch implements the JDWP side of the thread state/status command.  
It basically converts the JVMTI ThreadState info into one of the 
restrictive categories required by the JDWP spec.  This should be pretty 
straightforward, but I had some questions about what to do in the case 
that a thread has been created but has not yet started.  Clearly, it is 
not ZOMBIE, and the logic will eliminate WAIT, MONITOR, AND SLEEPING, so 
since the only possible status remaining is RUNNING (NEW doesn't exist), 
that's what I've set it to.

ChangeLog
2007-04-24  Kyle Galloway  <kgallowa@redhat.com>

   * gnu/classpath/jdwp/natVMVirtualMachine.java (getThreadStatus): 
Implement.

Questions/comments/concerns?

- Kyle
Index: libjava/gnu/classpath/jdwp/natVMVirtualMachine.cc
===================================================================
--- libjava/gnu/classpath/jdwp/natVMVirtualMachine.cc	(revision 124075)
+++ libjava/gnu/classpath/jdwp/natVMVirtualMachine.cc	(working copy)
@@ -31,6 +31,7 @@
 #include <gnu/classpath/jdwp/Jdwp.h>
 #include <gnu/classpath/jdwp/JdwpConstants$StepDepth.h>
 #include <gnu/classpath/jdwp/JdwpConstants$StepSize.h>
+#include <gnu/classpath/jdwp/JdwpConstants$ThreadStatus.h>
 #include <gnu/classpath/jdwp/VMFrame.h>
 #include <gnu/classpath/jdwp/VMMethod.h>
 #include <gnu/classpath/jdwp/VMVirtualMachine.h>
@@ -622,9 +623,37 @@
 
 jint
 gnu::classpath::jdwp::VMVirtualMachine::
-getThreadStatus (MAYBE_UNUSED Thread *thread)
+getThreadStatus (Thread *thread)
 {
-  return 0;
+  jint thr_state, status;
+  
+  jvmtiError jerr = _jdwp_jvmtiEnv->GetThreadState (thread, &thr_state);
+  if (jerr != JVMTI_ERROR_NONE)
+    throw_jvmti_error (jerr);
+  
+  if (thr_state & JVMTI_THREAD_STATE_SLEEPING)
+    status = gnu::classpath::jdwp::JdwpConstants$ThreadStatus::SLEEPING;
+  else if (thr_state & JVMTI_THREAD_STATE_RUNNABLE)
+    status = gnu::classpath::jdwp::JdwpConstants$ThreadStatus::RUNNING;
+  else if (thr_state & JVMTI_THREAD_STATE_WAITING)
+    {
+      if (thr_state & (JVMTI_THREAD_STATE_IN_OBJECT_WAIT
+                       | JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER))
+        status = gnu::classpath::jdwp::JdwpConstants$ThreadStatus::MONITOR;
+      else
+        status = gnu::classpath::jdwp::JdwpConstants$ThreadStatus::WAIT;
+    }
+  else
+    {
+      // The thread is not SLEEPING, MONITOR, or WAIT.  It may, however, be
+      // alive but not yet started.
+      if (!(thr_state & (JVMTI_THREAD_STATE_ALIVE 
+                         | JVMTI_THREAD_STATE_TERMINATED)))
+        status = gnu::classpath::jdwp::JdwpConstants$ThreadStatus::RUNNING;
+      status = gnu::classpath::jdwp::JdwpConstants$ThreadStatus::ZOMBIE;     
+    }   
+
+  return status;
 }
 
 java::util::ArrayList *