truffle: src/share/vm/oops/instanceKlass.hpp comparison

7088955: add C2 IR support to the SA Reviewed-by: kvn

comparison

equal deleted inserted replaced

-:e6b1331a51d2
+:f6f3bb0ee072
 // Return the interesting information for the next previous version
 // of the klass. Returns NULL if there are no more previous versions.
 PreviousVersionInfo* next_previous_version();
 };
+//
+// nmethodBucket is used to record dependent nmethods for
+// deoptimization.  nmethod dependencies are actually <klass, method>
+// pairs but we really only care about the klass part for purposes of
+// finding nmethods which might need to be deoptimized.  Instead of
+// recording the method, a count of how many times a particular nmethod
+// was recorded is kept.  This ensures that any recording errors are
+// noticed since an nmethod should be removed as many times are it's
+// added.
+//
+class nmethodBucket: public CHeapObj {
+friend class VMStructs;
+private:
+nmethod*       _nmethod;
+int            _count;
+nmethodBucket* _next;
+public:
+nmethodBucket(nmethod* nmethod, nmethodBucket* next) {
+_nmethod = nmethod;
+_next = next;
+_count = 1;
+}
+int count()                             { return _count; }
+int increment()                         { _count += 1; return _count; }
+int decrement()                         { _count -= 1; assert(_count >= 0, "don't underflow"); return _count; }
+nmethodBucket* next()                   { return _next; }
+void set_next(nmethodBucket* b)         { _next = b; }
+nmethod* get_nmethod()                  { return _nmethod; }
+};
 #endif // SHARE_VM_OOPS_INSTANCEKLASS_HPP

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