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changeset 364:919e7959392a

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6742641: G1: NullPointerException during GCOld Summary: An update buffer is not processed correctly, which causes roots into the collection set not to be scanned and, hence, for the heap to be corrupted. The cause is that an object is accessed after it has been explicitly deleted, which causes a race. Reviewed-by: jcoomes, ysr
author tonyp
date Mon, 22 Sep 2008 09:56:49 -0400
parents 032ddb9432ad
children 5f44674206d3
files src/share/vm/gc_implementation/g1/dirtyCardQueue.cpp
diffstat 1 files changed, 2 insertions(+), 1 deletions(-) [+]
line wrap: on
line diff
--- a/src/share/vm/gc_implementation/g1/dirtyCardQueue.cpp	Wed Sep 17 19:59:35 2008 +0400
+++ b/src/share/vm/gc_implementation/g1/dirtyCardQueue.cpp	Mon Sep 22 09:56:49 2008 -0400
@@ -208,12 +208,13 @@
                                               nd->index, _sz,
                                               true, worker_i);
     void** buf = nd->buf;
+    size_t index = nd->index;
     delete nd;
     if (b) {
       deallocate_buffer(buf);
       return true;  // In normal case, go on to next buffer.
     } else {
-      enqueue_complete_buffer(buf, nd->index, true);
+      enqueue_complete_buffer(buf, index, true);
       return false;
     }
   } else {