8286063: check compiler queue after calling AbstractCompiler::on_empt…

…y_queue Reviewed-by: kvn
graalvm · May 4, 2022 · 3a75e92 · 3a75e92
1 parent eb6c6f3
commit 3a75e92
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/src/hotspot/share/compiler/compileBroker.cpp b/src/hotspot/share/compiler/compileBroker.cpp
@@ -440,6 +440,11 @@ CompileTask* CompileQueue::get(CompilerThread* thread) {
     AbstractCompiler* compiler = thread->compiler();
     guarantee(compiler != nullptr, "Compiler object must exist");
     compiler->on_empty_queue(this, thread);
+    if (_first != nullptr) {
+      // The call to on_empty_queue may have temporarily unlocked the MCQ lock
+      // so check again whether any tasks were added to the queue.
+      break;
+    }
 
     // If there are no compilation tasks and we can compile new jobs
     // (i.e., there is enough free space in the code cache) there is