--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/share/vm/runtime/vframeArray.hpp Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,201 @@
+/*
+ * Copyright 1997-2007 Sun Microsystems, Inc. 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
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+// A vframeArray is an array used for momentarily storing off stack Java method activations
+// during deoptimization. Essentially it is an array of vframes where each vframe
+// data is stored off stack. This structure will never exist across a safepoint so
+// there is no need to gc any oops that are stored in the structure.
+
+
+class LocalsClosure;
+class ExpressionStackClosure;
+class MonitorStackClosure;
+class MonitorArrayElement;
+class StackValueCollection;
+
+// A vframeArrayElement is an element of a vframeArray. Each element
+// represent an interpreter frame which will eventually be created.
+
+class vframeArrayElement : public _ValueObj {
+ private:
+
+ frame _frame; // the interpreter frame we will unpack into
+ int _bci; // raw bci for this vframe
+ methodOop _method; // the method for this vframe
+ MonitorChunk* _monitors; // active monitors for this vframe
+ StackValueCollection* _locals;
+ StackValueCollection* _expressions;
+
+ public:
+
+ frame* iframe(void) { return &_frame; }
+
+ int bci(void) const;
+
+ int raw_bci(void) const { return _bci; }
+
+ methodOop method(void) const { return _method; }
+
+ MonitorChunk* monitors(void) const { return _monitors; }
+
+ void free_monitors(JavaThread* jt);
+
+ StackValueCollection* locals(void) const { return _locals; }
+
+ StackValueCollection* expressions(void) const { return _expressions; }
+
+ void fill_in(compiledVFrame* vf);
+
+ // Formerly part of deoptimizedVFrame
+
+
+ // Returns the on stack word size for this frame
+ // callee_parameters is the number of callee locals residing inside this frame
+ int on_stack_size(int callee_parameters,
+ int callee_locals,
+ bool is_top_frame,
+ int popframe_extra_stack_expression_els) const;
+
+ // Unpacks the element to skeletal interpreter frame
+ void unpack_on_stack(int callee_parameters,
+ int callee_locals,
+ frame* caller,
+ bool is_top_frame,
+ int exec_mode);
+
+#ifndef PRODUCT
+ void print(outputStream* st);
+#endif /* PRODUCT */
+};
+
+// this can be a ResourceObj if we don't save the last one...
+// but it does make debugging easier even if we can't look
+// at the data in each vframeElement
+
+class vframeArray: public CHeapObj {
+ private:
+
+
+ // Here is what a vframeArray looks like in memory
+
+ /*
+ fixed part
+ description of the original frame
+ _frames - number of vframes in this array
+ adapter info
+ callee register save area
+ variable part
+ vframeArrayElement [ 0 ]
+ ...
+ vframeArrayElement [_frames - 1]
+
+ */
+
+ JavaThread* _owner_thread;
+ vframeArray* _next;
+ frame _original; // the original frame of the deoptee
+ frame _caller; // caller of root frame in vframeArray
+ frame _sender;
+
+ Deoptimization::UnrollBlock* _unroll_block;
+ int _frame_size;
+
+ int _frames; // number of javavframes in the array (does not count any adapter)
+
+ intptr_t _callee_registers[RegisterMap::reg_count];
+ unsigned char _valid[RegisterMap::reg_count];
+
+ vframeArrayElement _elements[1]; // First variable section.
+
+ void fill_in_element(int index, compiledVFrame* vf);
+
+ bool is_location_valid(int i) const { return _valid[i] != 0; }
+ void set_location_valid(int i, bool valid) { _valid[i] = valid; }
+
+ public:
+
+
+ // Tells whether index is within bounds.
+ bool is_within_bounds(int index) const { return 0 <= index && index < frames(); }
+
+ // Accessores for instance variable
+ int frames() const { return _frames; }
+
+ static vframeArray* allocate(JavaThread* thread, int frame_size, GrowableArray<compiledVFrame*>* chunk,
+ RegisterMap* reg_map, frame sender, frame caller, frame self);
+
+
+ vframeArrayElement* element(int index) { assert(is_within_bounds(index), "Bad index"); return &_elements[index]; }
+
+ // Allocates a new vframe in the array and fills the array with vframe information in chunk
+ void fill_in(JavaThread* thread, int frame_size, GrowableArray<compiledVFrame*>* chunk, const RegisterMap *reg_map);
+
+ // Returns the owner of this vframeArray
+ JavaThread* owner_thread() const { return _owner_thread; }
+
+ // Accessors for next
+ vframeArray* next() const { return _next; }
+ void set_next(vframeArray* value) { _next = value; }
+
+ // Accessors for sp
+ intptr_t* sp() const { return _original.sp(); }
+
+ intptr_t* unextended_sp() const { return _original.unextended_sp(); }
+
+ address original_pc() const { return _original.pc(); }
+
+ frame original() const { return _original; }
+
+ frame caller() const { return _caller; }
+
+ frame sender() const { return _sender; }
+
+ // Accessors for unroll block
+ Deoptimization::UnrollBlock* unroll_block() const { return _unroll_block; }
+ void set_unroll_block(Deoptimization::UnrollBlock* block) { _unroll_block = block; }
+
+ // Returns the size of the frame that got deoptimized
+ int frame_size() const { return _frame_size; }
+
+ // Unpack the array on the stack passed in stack interval
+ void unpack_to_stack(frame &unpack_frame, int exec_mode);
+
+ // Deallocates monitor chunks allocated during deoptimization.
+ // This should be called when the array is not used anymore.
+ void deallocate_monitor_chunks();
+
+
+
+ // Accessor for register map
+ address register_location(int i) const;
+
+ void print_on_2(outputStream* st) PRODUCT_RETURN;
+ void print_value_on(outputStream* st) const PRODUCT_RETURN;
+
+#ifndef PRODUCT
+ // Comparing
+ bool structural_compare(JavaThread* thread, GrowableArray<compiledVFrame*>* chunk);
+#endif
+
+};