vframeArray.hpp revision 1472
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08a0f9b044f01fb540a861b94b63d77dd3d576eechenlu chen - Sun Microsystems - Beijing China// A vframeArray is an array used for momentarily storing off stack Java method activations
08a0f9b044f01fb540a861b94b63d77dd3d576eechenlu chen - Sun Microsystems - Beijing China// during deoptimization. Essentially it is an array of vframes where each vframe
08a0f9b044f01fb540a861b94b63d77dd3d576eechenlu chen - Sun Microsystems - Beijing China// data is stored off stack. This structure will never exist across a safepoint so
13485e69b5429e6c7d27301fb3c0deee0e93768aGarrett D'Amore// there is no need to gc any oops that are stored in the structure.
c869993e79c1eafbec61a56bf6cea848fe754c71xy// A vframeArrayElement is an element of a vframeArray. Each element
c869993e79c1eafbec61a56bf6cea848fe754c71xy// represent an interpreter frame which will eventually be created.
c869993e79c1eafbec61a56bf6cea848fe754c71xy frame _frame; // the interpreter frame we will unpack into
c869993e79c1eafbec61a56bf6cea848fe754c71xy bool _reexecute; // whether sould we reexecute this bytecode
c869993e79c1eafbec61a56bf6cea848fe754c71xy MonitorChunk* _monitors; // active monitors for this vframe
c869993e79c1eafbec61a56bf6cea848fe754c71xy int bci(void) const;
c869993e79c1eafbec61a56bf6cea848fe754c71xy StackValueCollection* locals(void) const { return _locals; }
c869993e79c1eafbec61a56bf6cea848fe754c71xy StackValueCollection* expressions(void) const { return _expressions; }
8bb4b220fdb894543e41a5f9037898cf3c3f312bgl // Formerly part of deoptimizedVFrame
c869993e79c1eafbec61a56bf6cea848fe754c71xy // Returns the on stack word size for this frame
c869993e79c1eafbec61a56bf6cea848fe754c71xy // callee_parameters is the number of callee locals residing inside this frame
c869993e79c1eafbec61a56bf6cea848fe754c71xy // Unpacks the element to skeletal interpreter frame
3f7e60a636ef887af87fadf9ab6289c672532dd9zhefeng xu - Sun Microsystems - Beijing China bool is_top_frame,
cf8dcc9bbabedca41ecfee13dec8172104e99968zhefeng xu - Sun Microsystems - Beijing China int exec_mode);
ac7f5757903d7806e03e59f71c10eec36e0deadechenlu chen - Sun Microsystems - Beijing China#ifndef PRODUCT
ac7f5757903d7806e03e59f71c10eec36e0deadechenlu chen - Sun Microsystems - Beijing China void print(outputStream* st);
c869993e79c1eafbec61a56bf6cea848fe754c71xy#endif /* PRODUCT */
c869993e79c1eafbec61a56bf6cea848fe754c71xy// this can be a ResourceObj if we don't save the last one...
c869993e79c1eafbec61a56bf6cea848fe754c71xy// but it does make debugging easier even if we can't look
80a11ad227f9c82cd6e7cf5c8913a37f00b7af0echenlu chen - Sun Microsystems - Beijing China// at the data in each vframeElement
80a11ad227f9c82cd6e7cf5c8913a37f00b7af0echenlu chen - Sun Microsystems - Beijing Chinaclass vframeArray: public CHeapObj {
c869993e79c1eafbec61a56bf6cea848fe754c71xy // Here is what a vframeArray looks like in memory
c869993e79c1eafbec61a56bf6cea848fe754c71xy fixed part
c869993e79c1eafbec61a56bf6cea848fe754c71xy description of the original frame
80a11ad227f9c82cd6e7cf5c8913a37f00b7af0echenlu chen - Sun Microsystems - Beijing China _frames - number of vframes in this array
80a11ad227f9c82cd6e7cf5c8913a37f00b7af0echenlu chen - Sun Microsystems - Beijing China callee register save area
80a11ad227f9c82cd6e7cf5c8913a37f00b7af0echenlu chen - Sun Microsystems - Beijing China variable part
80a11ad227f9c82cd6e7cf5c8913a37f00b7af0echenlu chen - Sun Microsystems - Beijing China vframeArrayElement [ 0 ]
80a11ad227f9c82cd6e7cf5c8913a37f00b7af0echenlu chen - Sun Microsystems - Beijing China vframeArrayElement [_frames - 1]
da14cebe459d3275048785f25bd869cb09b5307fEric Cheng frame _original; // the original frame of the deoptee
c869993e79c1eafbec61a56bf6cea848fe754c71xy int _frames; // number of javavframes in the array (does not count any adapter)
6ca163a136944eea4423498926e09cef9889312cvitezslav batrla - Sun Microsystems - Prague Czech Republic unsigned char _valid[RegisterMap::reg_count];
c869993e79c1eafbec61a56bf6cea848fe754c71xy vframeArrayElement _elements[1]; // First variable section.
c869993e79c1eafbec61a56bf6cea848fe754c71xy bool is_location_valid(int i) const { return _valid[i] != 0; }
da14cebe459d3275048785f25bd869cb09b5307fEric Cheng void set_location_valid(int i, bool valid) { _valid[i] = valid; }
c869993e79c1eafbec61a56bf6cea848fe754c71xy // Tells whether index is within bounds.
c869993e79c1eafbec61a56bf6cea848fe754c71xy bool is_within_bounds(int index) const { return 0 <= index && index < frames(); }
c869993e79c1eafbec61a56bf6cea848fe754c71xy // Accessores for instance variable
c869993e79c1eafbec61a56bf6cea848fe754c71xy static vframeArray* allocate(JavaThread* thread, int frame_size, GrowableArray<compiledVFrame*>* chunk,
c869993e79c1eafbec61a56bf6cea848fe754c71xy RegisterMap* reg_map, frame sender, frame caller, frame self);
c869993e79c1eafbec61a56bf6cea848fe754c71xy vframeArrayElement* element(int index) { assert(is_within_bounds(index), "Bad index"); return &_elements[index]; }
da14cebe459d3275048785f25bd869cb09b5307fEric Cheng // Allocates a new vframe in the array and fills the array with vframe information in chunk
c869993e79c1eafbec61a56bf6cea848fe754c71xy void fill_in(JavaThread* thread, int frame_size, GrowableArray<compiledVFrame*>* chunk, const RegisterMap *reg_map);
c869993e79c1eafbec61a56bf6cea848fe754c71xy // Returns the owner of this vframeArray
3f7e60a636ef887af87fadf9ab6289c672532dd9zhefeng xu - Sun Microsystems - Beijing China JavaThread* owner_thread() const { return _owner_thread; }
c869993e79c1eafbec61a56bf6cea848fe754c71xy // Accessors for next
69b2d733deffed6bf9baf89d901afd9c81b484edGuoqing Zhu // Accessors for sp
6ca163a136944eea4423498926e09cef9889312cvitezslav batrla - Sun Microsystems - Prague Czech Republic intptr_t* sp() const { return _original.sp(); }
d11274aa6f1c1462c11e04d3da70b7453f6f0ebdPaul Guo intptr_t* unextended_sp() const { return _original.unextended_sp(); }
c869993e79c1eafbec61a56bf6cea848fe754c71xy // Accessors for unroll block
c869993e79c1eafbec61a56bf6cea848fe754c71xy Deoptimization::UnrollBlock* unroll_block() const { return _unroll_block; }
c869993e79c1eafbec61a56bf6cea848fe754c71xy void set_unroll_block(Deoptimization::UnrollBlock* block) { _unroll_block = block; }
c869993e79c1eafbec61a56bf6cea848fe754c71xy // Returns the size of the frame that got deoptimized
c869993e79c1eafbec61a56bf6cea848fe754c71xy // Unpack the array on the stack passed in stack interval
c869993e79c1eafbec61a56bf6cea848fe754c71xy void unpack_to_stack(frame &unpack_frame, int exec_mode);
c869993e79c1eafbec61a56bf6cea848fe754c71xy // Deallocates monitor chunks allocated during deoptimization.
c869993e79c1eafbec61a56bf6cea848fe754c71xy // This should be called when the array is not used anymore.
b8d0a37778010a5166d34bb0d192cf6b1b2f7becchenlu chen - Sun Microsystems - Beijing China void deallocate_monitor_chunks();
8bb4b220fdb894543e41a5f9037898cf3c3f312bgl // Accessor for register map
c869993e79c1eafbec61a56bf6cea848fe754c71xy void print_value_on(outputStream* st) const PRODUCT_RETURN;
c869993e79c1eafbec61a56bf6cea848fe754c71xy // Comparing