Mercurial > hg > graal-compiler
diff src/share/vm/runtime/vframeArray.hpp @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
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children | 9987d9d5eb0e |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/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 + +};