| /* |
| * Copyright (c) 1997, 2013, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #ifndef SHARE_VM_RUNTIME_VFRAMEARRAY_HPP |
| #define SHARE_VM_RUNTIME_VFRAMEARRAY_HPP |
| |
| #include "oops/arrayOop.hpp" |
| #include "runtime/deoptimization.hpp" |
| #include "runtime/frame.inline.hpp" |
| #include "runtime/monitorChunk.hpp" |
| #include "utilities/growableArray.hpp" |
| |
| // 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 { |
| friend class VMStructs; |
| |
| private: |
| |
| frame _frame; // the interpreter frame we will unpack into |
| int _bci; // raw bci for this vframe |
| bool _reexecute; // whether sould we reexecute this bytecode |
| Method* _method; // the method for this vframe |
| MonitorChunk* _monitors; // active monitors for this vframe |
| StackValueCollection* _locals; |
| StackValueCollection* _expressions; |
| #ifdef ASSERT |
| bool _removed_monitors; |
| #endif |
| |
| public: |
| |
| frame* iframe(void) { return &_frame; } |
| |
| int bci(void) const; |
| |
| int raw_bci(void) const { return _bci; } |
| bool should_reexecute(void) const { return _reexecute; } |
| |
| Method* 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, bool realloc_failures); |
| |
| // 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 caller_actual_parameters, |
| int callee_parameters, |
| int callee_locals, |
| frame* caller, |
| bool is_top_frame, |
| bool is_bottom_frame, |
| int exec_mode); |
| |
| #ifdef ASSERT |
| void set_removed_monitors() { |
| _removed_monitors = true; |
| } |
| #endif |
| |
| #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<mtCompiler> { |
| friend class VMStructs; |
| |
| 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, |
| bool realloc_failures); |
| |
| |
| 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, bool realloc_failures); |
| |
| // 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, int caller_actual_parameters); |
| |
| // 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 |
| |
| }; |
| |
| #endif // SHARE_VM_RUNTIME_VFRAMEARRAY_HPP |