Mercurial > hg > truffle
diff src/share/vm/memory/barrierSet.hpp @ 2324:0ac769a57c64
6627983: G1: Bad oop deference during marking
Summary: Bulk zeroing reduction didn't work with G1, because arraycopy would call pre-barriers on uninitialized oops. The solution is to have version of arraycopy stubs that don't have pre-barriers. Also refactored arraycopy stubs generation on SPARC to be more readable and reduced the number of stubs necessary in some cases.
Reviewed-by: jrose, kvn, never
| author | iveresov |
|---|---|
| date | Tue, 01 Mar 2011 14:56:48 -0800 |
| parents | f95d63e2154a |
| children | fd09f2d8283e |
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--- a/src/share/vm/memory/barrierSet.hpp Tue Mar 01 10:27:15 2011 -0800 +++ b/src/share/vm/memory/barrierSet.hpp Tue Mar 01 14:56:48 2011 -0800 @@ -1,5 +1,5 @@ /* - * Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved. + * Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it @@ -44,6 +44,10 @@ Uninit }; + enum Flags { + None = 0, + TargetUninitialized = 1 + }; protected: int _max_covered_regions; Name _kind; @@ -128,8 +132,10 @@ virtual void read_prim_array(MemRegion mr) = 0; // Below length is the # array elements being written - virtual void write_ref_array_pre( oop* dst, int length) {} - virtual void write_ref_array_pre(narrowOop* dst, int length) {} + virtual void write_ref_array_pre(oop* dst, int length, + bool dest_uninitialized = false) {} + virtual void write_ref_array_pre(narrowOop* dst, int length, + bool dest_uninitialized = false) {} // Below count is the # array elements being written, starting // at the address "start", which may not necessarily be HeapWord-aligned inline void write_ref_array(HeapWord* start, size_t count);