truffle: src/share/vm/runtime/thread.cpp comparison

Merge

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equal deleted inserted replaced

-:f8199438385b
+:032ddb9432ad
 }
 // Someday we could have a table or list of all non-JavaThreads.
 // For now, just manually iterate through them.
 tc->do_thread(VMThread::vm_thread());
 Universe::heap()->gc_threads_do(tc);
-{
+WatcherThread *wt = WatcherThread::watcher_thread();
-// Grab the Terminator_lock to prevent watcher_thread from being terminated.
+// Strictly speaking, the following NULL check isn't sufficient to make sure
-MutexLockerEx mu(Terminator_lock, Mutex::_no_safepoint_check_flag);
+// the data for WatcherThread is still valid upon being examined. However,
-WatcherThread *wt = WatcherThread::watcher_thread();
+// considering that WatchThread terminates when the VM is on the way to
-if (wt != NULL)
+// exit at safepoint, the chance of the above is extremely small. The right
-tc->do_thread(wt);
+// way to prevent termination of WatcherThread would be to acquire
-}
+// Terminator_lock, but we can't do that without violating the lock rank
+// checking in some cases.
+if (wt != NULL)
+tc->do_thread(wt);
 // If CompilerThreads ever become non-JavaThreads, add them here
 }
 jint Threads::create_vm(JavaVMInitArgs* args, bool* canTryAgain) {

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