Sulong: Clear thread objects on join instead of on task completion

Author: fmorcos

sulong/projects/com.oracle.truffle.llvm.runtime/src/com/oracle/truffle/llvm/runtime/nodes/intrinsics/multithreading/LLVMPThreadStart.java

@@ -94,7 +94,6 @@ public void run() {
                         }
                     }
                 }
-                pThreadContext.clearThreadID();
             }
         }
     }

sulong/projects/com.oracle.truffle.llvm.runtime/src/com/oracle/truffle/llvm/runtime/nodes/intrinsics/multithreading/LLVMPThreadThreadIntrinsics.java

@@ -107,6 +107,7 @@ protected Object doIntrinsic(long threadID,
             LLVMPThreadContext pthreadContext = context.getpThreadContext();
             Object threadReturnValue = pthreadContext.getThreadReturnValue(threadID);
             pthreadContext.clearThreadReturnValue(threadID);
+            pthreadContext.clearThreadID(threadID);
             return threadReturnValue;
         }
     }

sulong/projects/com.oracle.truffle.llvm.runtime/src/com/oracle/truffle/llvm/runtime/pthread/LLVMPThreadContext.java

@@ -210,8 +210,8 @@ public Thread getThread(long threadID) {
     }
 
     @TruffleBoundary
-    public void clearThreadID() {
-        threadStorage.remove(Thread.currentThread().getId());
+    public void clearThreadID(long threadID) {
+        threadStorage.remove(threadID);
     }
 
     @TruffleBoundary