Mercurial > hg > graal-compiler
diff src/share/vm/memory/iterator.hpp @ 2177:3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
Summary: move symbols from permgen into C heap and reference count them
Reviewed-by: never, acorn, jmasa, stefank
| author | coleenp |
|---|---|
| date | Thu, 27 Jan 2011 16:11:27 -0800 |
| parents | f95d63e2154a |
| children | 1d1603768966 |
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--- a/src/share/vm/memory/iterator.hpp Thu Jan 27 13:42:28 2011 -0800 +++ b/src/share/vm/memory/iterator.hpp Thu Jan 27 16:11:27 2011 -0800 @@ -290,6 +290,22 @@ virtual void do_tag(int tag) = 0; }; +class SymbolClosure : public StackObj { + public: + virtual void do_symbol(Symbol**) = 0; + + // Clear LSB in symbol address; it can be set by CPSlot. + static Symbol* load_symbol(Symbol** p) { + return (Symbol*)(intptr_t(*p) & ~1); + } + + // Store symbol, adjusting new pointer if the original pointer was adjusted + // (symbol references in constant pool slots have their LSB set to 1). + static void store_symbol(Symbol** p, Symbol* sym) { + *p = (Symbol*)(intptr_t(sym) | (intptr_t(*p) & 1)); + } +}; + #ifdef ASSERT // This class is used to flag phases of a collection that // can unload classes and which should override the