Fri, 31 Oct 2014 12:16:20 +0100
8062169: Multiple OSR compilations issued for same bci
Summary: Fixed 'SimpleThresholdPolicy::event' to always perform OSR if an OSR nmethod is available.
Reviewed-by: kvn, iveresov
duke@435 | 1 | /* |
mikael@6198 | 2 | * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@435 | 4 | * |
duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
duke@435 | 7 | * published by the Free Software Foundation. |
duke@435 | 8 | * |
duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@435 | 13 | * accompanied this code). |
duke@435 | 14 | * |
duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@435 | 18 | * |
trims@1907 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
trims@1907 | 20 | * or visit www.oracle.com if you need additional information or have any |
trims@1907 | 21 | * questions. |
duke@435 | 22 | * |
duke@435 | 23 | */ |
duke@435 | 24 | |
stefank@2314 | 25 | #ifndef SHARE_VM_RUNTIME_VFRAMEARRAY_HPP |
stefank@2314 | 26 | #define SHARE_VM_RUNTIME_VFRAMEARRAY_HPP |
stefank@2314 | 27 | |
stefank@2314 | 28 | #include "oops/arrayOop.hpp" |
stefank@2314 | 29 | #include "runtime/deoptimization.hpp" |
stefank@2314 | 30 | #include "runtime/frame.inline.hpp" |
stefank@2314 | 31 | #include "runtime/monitorChunk.hpp" |
stefank@2314 | 32 | #include "utilities/growableArray.hpp" |
stefank@2314 | 33 | |
duke@435 | 34 | // A vframeArray is an array used for momentarily storing off stack Java method activations |
duke@435 | 35 | // during deoptimization. Essentially it is an array of vframes where each vframe |
duke@435 | 36 | // data is stored off stack. This structure will never exist across a safepoint so |
duke@435 | 37 | // there is no need to gc any oops that are stored in the structure. |
duke@435 | 38 | |
duke@435 | 39 | |
duke@435 | 40 | class LocalsClosure; |
duke@435 | 41 | class ExpressionStackClosure; |
duke@435 | 42 | class MonitorStackClosure; |
duke@435 | 43 | class MonitorArrayElement; |
duke@435 | 44 | class StackValueCollection; |
duke@435 | 45 | |
duke@435 | 46 | // A vframeArrayElement is an element of a vframeArray. Each element |
duke@435 | 47 | // represent an interpreter frame which will eventually be created. |
duke@435 | 48 | |
duke@435 | 49 | class vframeArrayElement : public _ValueObj { |
never@3138 | 50 | friend class VMStructs; |
never@3138 | 51 | |
duke@435 | 52 | private: |
duke@435 | 53 | |
duke@435 | 54 | frame _frame; // the interpreter frame we will unpack into |
cfang@1335 | 55 | int _bci; // raw bci for this vframe |
cfang@1335 | 56 | bool _reexecute; // whether sould we reexecute this bytecode |
coleenp@4037 | 57 | Method* _method; // the method for this vframe |
duke@435 | 58 | MonitorChunk* _monitors; // active monitors for this vframe |
duke@435 | 59 | StackValueCollection* _locals; |
duke@435 | 60 | StackValueCollection* _expressions; |
duke@435 | 61 | |
duke@435 | 62 | public: |
duke@435 | 63 | |
duke@435 | 64 | frame* iframe(void) { return &_frame; } |
duke@435 | 65 | |
duke@435 | 66 | int bci(void) const; |
duke@435 | 67 | |
duke@435 | 68 | int raw_bci(void) const { return _bci; } |
cfang@1335 | 69 | bool should_reexecute(void) const { return _reexecute; } |
duke@435 | 70 | |
coleenp@4037 | 71 | Method* method(void) const { return _method; } |
duke@435 | 72 | |
duke@435 | 73 | MonitorChunk* monitors(void) const { return _monitors; } |
duke@435 | 74 | |
duke@435 | 75 | void free_monitors(JavaThread* jt); |
duke@435 | 76 | |
duke@435 | 77 | StackValueCollection* locals(void) const { return _locals; } |
duke@435 | 78 | |
duke@435 | 79 | StackValueCollection* expressions(void) const { return _expressions; } |
duke@435 | 80 | |
duke@435 | 81 | void fill_in(compiledVFrame* vf); |
duke@435 | 82 | |
duke@435 | 83 | // Formerly part of deoptimizedVFrame |
duke@435 | 84 | |
duke@435 | 85 | |
duke@435 | 86 | // Returns the on stack word size for this frame |
duke@435 | 87 | // callee_parameters is the number of callee locals residing inside this frame |
roland@6723 | 88 | int on_stack_size(int callee_parameters, |
duke@435 | 89 | int callee_locals, |
duke@435 | 90 | bool is_top_frame, |
duke@435 | 91 | int popframe_extra_stack_expression_els) const; |
duke@435 | 92 | |
duke@435 | 93 | // Unpacks the element to skeletal interpreter frame |
never@2901 | 94 | void unpack_on_stack(int caller_actual_parameters, |
never@2901 | 95 | int callee_parameters, |
duke@435 | 96 | int callee_locals, |
duke@435 | 97 | frame* caller, |
duke@435 | 98 | bool is_top_frame, |
roland@4727 | 99 | bool is_bottom_frame, |
duke@435 | 100 | int exec_mode); |
duke@435 | 101 | |
duke@435 | 102 | #ifndef PRODUCT |
duke@435 | 103 | void print(outputStream* st); |
duke@435 | 104 | #endif /* PRODUCT */ |
duke@435 | 105 | }; |
duke@435 | 106 | |
duke@435 | 107 | // this can be a ResourceObj if we don't save the last one... |
duke@435 | 108 | // but it does make debugging easier even if we can't look |
duke@435 | 109 | // at the data in each vframeElement |
duke@435 | 110 | |
zgu@3900 | 111 | class vframeArray: public CHeapObj<mtCompiler> { |
never@3138 | 112 | friend class VMStructs; |
never@3138 | 113 | |
duke@435 | 114 | private: |
duke@435 | 115 | |
duke@435 | 116 | |
duke@435 | 117 | // Here is what a vframeArray looks like in memory |
duke@435 | 118 | |
duke@435 | 119 | /* |
duke@435 | 120 | fixed part |
duke@435 | 121 | description of the original frame |
duke@435 | 122 | _frames - number of vframes in this array |
duke@435 | 123 | adapter info |
duke@435 | 124 | callee register save area |
duke@435 | 125 | variable part |
duke@435 | 126 | vframeArrayElement [ 0 ] |
duke@435 | 127 | ... |
duke@435 | 128 | vframeArrayElement [_frames - 1] |
duke@435 | 129 | |
duke@435 | 130 | */ |
duke@435 | 131 | |
duke@435 | 132 | JavaThread* _owner_thread; |
duke@435 | 133 | vframeArray* _next; |
duke@435 | 134 | frame _original; // the original frame of the deoptee |
duke@435 | 135 | frame _caller; // caller of root frame in vframeArray |
duke@435 | 136 | frame _sender; |
duke@435 | 137 | |
duke@435 | 138 | Deoptimization::UnrollBlock* _unroll_block; |
duke@435 | 139 | int _frame_size; |
duke@435 | 140 | |
duke@435 | 141 | int _frames; // number of javavframes in the array (does not count any adapter) |
duke@435 | 142 | |
duke@435 | 143 | intptr_t _callee_registers[RegisterMap::reg_count]; |
duke@435 | 144 | unsigned char _valid[RegisterMap::reg_count]; |
duke@435 | 145 | |
duke@435 | 146 | vframeArrayElement _elements[1]; // First variable section. |
duke@435 | 147 | |
duke@435 | 148 | void fill_in_element(int index, compiledVFrame* vf); |
duke@435 | 149 | |
duke@435 | 150 | bool is_location_valid(int i) const { return _valid[i] != 0; } |
duke@435 | 151 | void set_location_valid(int i, bool valid) { _valid[i] = valid; } |
duke@435 | 152 | |
duke@435 | 153 | public: |
duke@435 | 154 | |
duke@435 | 155 | |
duke@435 | 156 | // Tells whether index is within bounds. |
duke@435 | 157 | bool is_within_bounds(int index) const { return 0 <= index && index < frames(); } |
duke@435 | 158 | |
duke@435 | 159 | // Accessores for instance variable |
duke@435 | 160 | int frames() const { return _frames; } |
duke@435 | 161 | |
duke@435 | 162 | static vframeArray* allocate(JavaThread* thread, int frame_size, GrowableArray<compiledVFrame*>* chunk, |
duke@435 | 163 | RegisterMap* reg_map, frame sender, frame caller, frame self); |
duke@435 | 164 | |
duke@435 | 165 | |
duke@435 | 166 | vframeArrayElement* element(int index) { assert(is_within_bounds(index), "Bad index"); return &_elements[index]; } |
duke@435 | 167 | |
duke@435 | 168 | // Allocates a new vframe in the array and fills the array with vframe information in chunk |
duke@435 | 169 | void fill_in(JavaThread* thread, int frame_size, GrowableArray<compiledVFrame*>* chunk, const RegisterMap *reg_map); |
duke@435 | 170 | |
duke@435 | 171 | // Returns the owner of this vframeArray |
duke@435 | 172 | JavaThread* owner_thread() const { return _owner_thread; } |
duke@435 | 173 | |
duke@435 | 174 | // Accessors for next |
duke@435 | 175 | vframeArray* next() const { return _next; } |
duke@435 | 176 | void set_next(vframeArray* value) { _next = value; } |
duke@435 | 177 | |
duke@435 | 178 | // Accessors for sp |
duke@435 | 179 | intptr_t* sp() const { return _original.sp(); } |
duke@435 | 180 | |
duke@435 | 181 | intptr_t* unextended_sp() const { return _original.unextended_sp(); } |
duke@435 | 182 | |
duke@435 | 183 | address original_pc() const { return _original.pc(); } |
duke@435 | 184 | |
duke@435 | 185 | frame original() const { return _original; } |
duke@435 | 186 | |
duke@435 | 187 | frame caller() const { return _caller; } |
duke@435 | 188 | |
duke@435 | 189 | frame sender() const { return _sender; } |
duke@435 | 190 | |
duke@435 | 191 | // Accessors for unroll block |
duke@435 | 192 | Deoptimization::UnrollBlock* unroll_block() const { return _unroll_block; } |
duke@435 | 193 | void set_unroll_block(Deoptimization::UnrollBlock* block) { _unroll_block = block; } |
duke@435 | 194 | |
duke@435 | 195 | // Returns the size of the frame that got deoptimized |
duke@435 | 196 | int frame_size() const { return _frame_size; } |
duke@435 | 197 | |
duke@435 | 198 | // Unpack the array on the stack passed in stack interval |
never@2901 | 199 | void unpack_to_stack(frame &unpack_frame, int exec_mode, int caller_actual_parameters); |
duke@435 | 200 | |
duke@435 | 201 | // Deallocates monitor chunks allocated during deoptimization. |
duke@435 | 202 | // This should be called when the array is not used anymore. |
duke@435 | 203 | void deallocate_monitor_chunks(); |
duke@435 | 204 | |
duke@435 | 205 | |
duke@435 | 206 | |
duke@435 | 207 | // Accessor for register map |
duke@435 | 208 | address register_location(int i) const; |
duke@435 | 209 | |
duke@435 | 210 | void print_on_2(outputStream* st) PRODUCT_RETURN; |
duke@435 | 211 | void print_value_on(outputStream* st) const PRODUCT_RETURN; |
duke@435 | 212 | |
duke@435 | 213 | #ifndef PRODUCT |
duke@435 | 214 | // Comparing |
duke@435 | 215 | bool structural_compare(JavaThread* thread, GrowableArray<compiledVFrame*>* chunk); |
duke@435 | 216 | #endif |
duke@435 | 217 | |
duke@435 | 218 | }; |
stefank@2314 | 219 | |
stefank@2314 | 220 | #endif // SHARE_VM_RUNTIME_VFRAMEARRAY_HPP |