1.1 --- a/src/share/vm/memory/iterator.hpp Tue Sep 15 11:09:34 2009 -0700
1.2 +++ b/src/share/vm/memory/iterator.hpp Tue Sep 15 21:53:47 2009 -0700
1.3 @@ -24,6 +24,7 @@
1.4
1.5 // The following classes are C++ `closures` for iterating over objects, roots and spaces
1.6
1.7 +class CodeBlob;
1.8 class ReferenceProcessor;
1.9
1.10 // Closure provides abortability.
1.11 @@ -57,9 +58,6 @@
1.12 virtual const bool should_remember_klasses() const { return false; }
1.13 virtual void remember_klass(Klass* k) { /* do nothing */ }
1.14
1.15 - // If "true", invoke on nmethods (when scanning compiled frames).
1.16 - virtual const bool do_nmethods() const { return false; }
1.17 -
1.18 // The methods below control how object iterations invoking this closure
1.19 // should be performed:
1.20
1.21 @@ -158,6 +156,51 @@
1.22 };
1.23
1.24
1.25 +// CodeBlobClosure is used for iterating through code blobs
1.26 +// in the code cache or on thread stacks
1.27 +
1.28 +class CodeBlobClosure : public Closure {
1.29 + public:
1.30 + // Called for each code blob.
1.31 + virtual void do_code_blob(CodeBlob* cb) = 0;
1.32 +};
1.33 +
1.34 +
1.35 +class MarkingCodeBlobClosure : public CodeBlobClosure {
1.36 + public:
1.37 + // Called for each code blob, but at most once per unique blob.
1.38 + virtual void do_newly_marked_nmethod(CodeBlob* cb) = 0;
1.39 +
1.40 + virtual void do_code_blob(CodeBlob* cb);
1.41 + // = { if (!nmethod(cb)->test_set_oops_do_mark()) do_newly_marked_nmethod(cb); }
1.42 +
1.43 + class MarkScope : public StackObj {
1.44 + protected:
1.45 + bool _active;
1.46 + public:
1.47 + MarkScope(bool activate = true);
1.48 + // = { if (active) nmethod::oops_do_marking_prologue(); }
1.49 + ~MarkScope();
1.50 + // = { if (active) nmethod::oops_do_marking_epilogue(); }
1.51 + };
1.52 +};
1.53 +
1.54 +
1.55 +// Applies an oop closure to all ref fields in code blobs
1.56 +// iterated over in an object iteration.
1.57 +class CodeBlobToOopClosure: public MarkingCodeBlobClosure {
1.58 + OopClosure* _cl;
1.59 + bool _do_marking;
1.60 +public:
1.61 + virtual void do_newly_marked_nmethod(CodeBlob* cb);
1.62 + // = { cb->oops_do(_cl); }
1.63 + virtual void do_code_blob(CodeBlob* cb);
1.64 + // = { if (_do_marking) super::do_code_blob(cb); else cb->oops_do(_cl); }
1.65 + CodeBlobToOopClosure(OopClosure* cl, bool do_marking)
1.66 + : _cl(cl), _do_marking(do_marking) {}
1.67 +};
1.68 +
1.69 +
1.70
1.71 // MonitorClosure is used for iterating over monitors in the monitors cache
1.72
