Mercurial > hg > truffle
annotate src/share/vm/runtime/frame.hpp @ 832:e7d5557ad624
Merge
author | jmasa |
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date | Thu, 02 Jul 2009 16:28:15 -0700 |
parents | eacd97c88873 |
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0 | 1 /* |
196 | 2 * Copyright 1997-2008 Sun Microsystems, Inc. All Rights Reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 typedef class BytecodeInterpreter* interpreterState; | |
26 | |
27 class CodeBlob; | |
28 | |
29 | |
30 // A frame represents a physical stack frame (an activation). Frames | |
31 // can be C or Java frames, and the Java frames can be interpreted or | |
32 // compiled. In contrast, vframes represent source-level activations, | |
33 // so that one physical frame can correspond to multiple source level | |
34 // frames because of inlining. | |
35 | |
36 class frame VALUE_OBJ_CLASS_SPEC { | |
37 private: | |
38 // Instance variables: | |
39 intptr_t* _sp; // stack pointer (from Thread::last_Java_sp) | |
40 address _pc; // program counter (the next instruction after the call) | |
41 | |
42 CodeBlob* _cb; // CodeBlob that "owns" pc | |
43 enum deopt_state { | |
44 not_deoptimized, | |
45 is_deoptimized, | |
46 unknown | |
47 }; | |
48 | |
49 deopt_state _deopt_state; | |
50 | |
51 public: | |
52 // Constructors | |
53 frame(); | |
54 | |
55 // Accessors | |
56 | |
57 // pc: Returns the pc at which this frame will continue normally. | |
58 // It must point at the beginning of the next instruction to execute. | |
59 address pc() const { return _pc; } | |
60 | |
61 // This returns the pc that if you were in the debugger you'd see. Not | |
62 // the idealized value in the frame object. This undoes the magic conversion | |
63 // that happens for deoptimized frames. In addition it makes the value the | |
64 // hardware would want to see in the native frame. The only user (at this point) | |
65 // is deoptimization. It likely no one else should ever use it. | |
66 address raw_pc() const; | |
67 | |
68 void set_pc( address newpc ); | |
69 | |
70 intptr_t* sp() const { return _sp; } | |
71 void set_sp( intptr_t* newsp ) { _sp = newsp; } | |
72 | |
73 | |
74 CodeBlob* cb() const { return _cb; } | |
75 | |
76 // patching operations | |
77 void patch_pc(Thread* thread, address pc); | |
78 | |
79 // Every frame needs to return a unique id which distinguishes it from all other frames. | |
80 // For sparc and ia32 use sp. ia64 can have memory frames that are empty so multiple frames | |
81 // will have identical sp values. For ia64 the bsp (fp) value will serve. No real frame | |
82 // should have an id() of NULL so it is a distinguishing value for an unmatchable frame. | |
83 // We also have relationals which allow comparing a frame to anoth frame's id() allow | |
84 // us to distinguish younger (more recent activation) from older (less recent activations) | |
85 // A NULL id is only valid when comparing for equality. | |
86 | |
87 intptr_t* id(void) const; | |
88 bool is_younger(intptr_t* id) const; | |
89 bool is_older(intptr_t* id) const; | |
90 | |
91 // testers | |
92 | |
93 // Compares for strict equality. Rarely used or needed. | |
94 // It can return a different result than f1.id() == f2.id() | |
95 bool equal(frame other) const; | |
96 | |
97 // type testers | |
98 bool is_interpreted_frame() const; | |
99 bool is_java_frame() const; | |
100 bool is_entry_frame() const; // Java frame called from C? | |
101 bool is_native_frame() const; | |
102 bool is_runtime_frame() const; | |
103 bool is_compiled_frame() const; | |
104 bool is_safepoint_blob_frame() const; | |
105 bool is_deoptimized_frame() const; | |
106 | |
107 // testers | |
108 bool is_first_frame() const; // oldest frame? (has no sender) | |
109 bool is_first_java_frame() const; // same for Java frame | |
110 | |
107
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111 bool is_interpreted_frame_valid(JavaThread* thread) const; // performs sanity checks on interpreted frames. |
0 | 112 |
113 // tells whether this frame is marked for deoptimization | |
114 bool should_be_deoptimized() const; | |
115 | |
116 // tells whether this frame can be deoptimized | |
117 bool can_be_deoptimized() const; | |
118 | |
119 // returns the frame size in stack slots | |
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120 int frame_size(RegisterMap* map) const; |
0 | 121 |
122 // returns the sending frame | |
123 frame sender(RegisterMap* map) const; | |
124 | |
125 // for Profiling - acting on another frame. walks sender frames | |
126 // if valid. | |
127 frame profile_find_Java_sender_frame(JavaThread *thread); | |
128 bool safe_for_sender(JavaThread *thread); | |
129 | |
130 // returns the sender, but skips conversion frames | |
131 frame real_sender(RegisterMap* map) const; | |
132 | |
133 // returns the the sending Java frame, skipping any intermediate C frames | |
134 // NB: receiver must not be first frame | |
135 frame java_sender() const; | |
136 | |
137 private: | |
138 // Helper methods for better factored code in frame::sender | |
139 frame sender_for_compiled_frame(RegisterMap* map) const; | |
140 frame sender_for_entry_frame(RegisterMap* map) const; | |
141 frame sender_for_interpreter_frame(RegisterMap* map) const; | |
142 frame sender_for_native_frame(RegisterMap* map) const; | |
143 | |
144 // All frames: | |
145 | |
146 // A low-level interface for vframes: | |
147 | |
148 public: | |
149 | |
150 intptr_t* addr_at(int index) const { return &fp()[index]; } | |
151 intptr_t at(int index) const { return *addr_at(index); } | |
152 | |
153 // accessors for locals | |
154 oop obj_at(int offset) const { return *obj_at_addr(offset); } | |
155 void obj_at_put(int offset, oop value) { *obj_at_addr(offset) = value; } | |
156 | |
157 jint int_at(int offset) const { return *int_at_addr(offset); } | |
158 void int_at_put(int offset, jint value) { *int_at_addr(offset) = value; } | |
159 | |
160 oop* obj_at_addr(int offset) const { return (oop*) addr_at(offset); } | |
161 | |
162 oop* adjusted_obj_at_addr(methodOop method, int index) { return obj_at_addr(adjust_offset(method, index)); } | |
163 | |
164 private: | |
165 jint* int_at_addr(int offset) const { return (jint*) addr_at(offset); } | |
166 | |
167 public: | |
168 // Link (i.e., the pointer to the previous frame) | |
169 intptr_t* link() const; | |
170 void set_link(intptr_t* addr); | |
171 | |
172 // Return address | |
173 address sender_pc() const; | |
174 | |
175 // Support for deoptimization | |
176 void deoptimize(JavaThread* thread, bool thread_is_known_safe = false); | |
177 | |
178 // The frame's original SP, before any extension by an interpreted callee; | |
179 // used for packing debug info into vframeArray objects and vframeArray lookup. | |
180 intptr_t* unextended_sp() const; | |
181 | |
182 // returns the stack pointer of the calling frame | |
183 intptr_t* sender_sp() const; | |
184 | |
185 | |
186 // Interpreter frames: | |
187 | |
188 private: | |
189 intptr_t** interpreter_frame_locals_addr() const; | |
190 intptr_t* interpreter_frame_bcx_addr() const; | |
191 intptr_t* interpreter_frame_mdx_addr() const; | |
192 | |
193 public: | |
194 // Tags for TaggedStackInterpreter | |
195 enum Tag { | |
196 TagValue = 0, // Important: must be zero to use G0 on sparc. | |
197 TagReference = 0x555, // Reference type - is an oop that needs gc. | |
198 TagCategory2 = 0x666 // Only used internally by interpreter | |
199 // and not written to the java stack. | |
200 // The values above are chosen so that misuse causes a crash | |
201 // with a recognizable value. | |
202 }; | |
203 | |
204 static Tag tag_for_basic_type(BasicType typ) { | |
205 return (typ == T_OBJECT ? TagReference : TagValue); | |
206 } | |
207 | |
208 // Locals | |
209 | |
210 // The _at version returns a pointer because the address is used for GC. | |
211 intptr_t* interpreter_frame_local_at(int index) const; | |
212 Tag interpreter_frame_local_tag(int index) const; | |
213 void interpreter_frame_set_local_tag(int index, Tag tag) const; | |
214 | |
215 void interpreter_frame_set_locals(intptr_t* locs); | |
216 | |
217 // byte code index/pointer (use these functions for unchecked frame access only!) | |
218 intptr_t interpreter_frame_bcx() const { return *interpreter_frame_bcx_addr(); } | |
219 void interpreter_frame_set_bcx(intptr_t bcx); | |
220 | |
221 // byte code index | |
222 jint interpreter_frame_bci() const; | |
223 void interpreter_frame_set_bci(jint bci); | |
224 | |
225 // byte code pointer | |
226 address interpreter_frame_bcp() const; | |
227 void interpreter_frame_set_bcp(address bcp); | |
228 | |
229 // Unchecked access to the method data index/pointer. | |
230 // Only use this if you know what you are doing. | |
231 intptr_t interpreter_frame_mdx() const { return *interpreter_frame_mdx_addr(); } | |
232 void interpreter_frame_set_mdx(intptr_t mdx); | |
233 | |
234 // method data pointer | |
235 address interpreter_frame_mdp() const; | |
236 void interpreter_frame_set_mdp(address dp); | |
237 | |
238 // Find receiver out of caller's (compiled) argument list | |
239 oop retrieve_receiver(RegisterMap *reg_map); | |
240 | |
241 // Return the monitor owner and BasicLock for compiled synchronized | |
242 // native methods so that biased locking can revoke the receiver's | |
243 // bias if necessary. Takes optional nmethod for this frame as | |
244 // argument to avoid performing repeated lookups in code cache. | |
245 BasicLock* compiled_synchronized_native_monitor (nmethod* nm = NULL); | |
246 oop compiled_synchronized_native_monitor_owner(nmethod* nm = NULL); | |
247 | |
248 // Find receiver for an invoke when arguments are just pushed on stack (i.e., callee stack-frame is | |
249 // not setup) | |
250 oop interpreter_callee_receiver(symbolHandle signature) { return *interpreter_callee_receiver_addr(signature); } | |
251 | |
252 | |
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253 oop* interpreter_callee_receiver_addr(symbolHandle signature); |
0 | 254 |
255 | |
256 // expression stack (may go up or down, direction == 1 or -1) | |
257 public: | |
258 intptr_t* interpreter_frame_expression_stack() const; | |
259 static jint interpreter_frame_expression_stack_direction(); | |
260 | |
261 // The _at version returns a pointer because the address is used for GC. | |
262 intptr_t* interpreter_frame_expression_stack_at(jint offset) const; | |
263 Tag interpreter_frame_expression_stack_tag(jint offset) const; | |
264 void interpreter_frame_set_expression_stack_tag(jint offset, Tag tag) const; | |
265 | |
266 // top of expression stack | |
267 intptr_t* interpreter_frame_tos_at(jint offset) const; | |
268 intptr_t* interpreter_frame_tos_address() const; | |
269 | |
270 | |
271 jint interpreter_frame_expression_stack_size() const; | |
272 | |
273 intptr_t* interpreter_frame_sender_sp() const; | |
274 | |
275 #ifndef CC_INTERP | |
276 // template based interpreter deoptimization support | |
277 void set_interpreter_frame_sender_sp(intptr_t* sender_sp); | |
278 void interpreter_frame_set_monitor_end(BasicObjectLock* value); | |
279 #endif // CC_INTERP | |
280 | |
281 // BasicObjectLocks: | |
282 // | |
283 // interpreter_frame_monitor_begin is higher in memory than interpreter_frame_monitor_end | |
284 // Interpreter_frame_monitor_begin points to one element beyond the oldest one, | |
285 // interpreter_frame_monitor_end points to the youngest one, or if there are none, | |
286 // it points to one beyond where the first element will be. | |
287 // interpreter_frame_monitor_size reports the allocation size of a monitor in the interpreter stack. | |
288 // this value is >= BasicObjectLock::size(), and may be rounded up | |
289 | |
290 BasicObjectLock* interpreter_frame_monitor_begin() const; | |
291 BasicObjectLock* interpreter_frame_monitor_end() const; | |
292 BasicObjectLock* next_monitor_in_interpreter_frame(BasicObjectLock* current) const; | |
293 BasicObjectLock* previous_monitor_in_interpreter_frame(BasicObjectLock* current) const; | |
294 static int interpreter_frame_monitor_size(); | |
295 | |
296 void interpreter_frame_verify_monitor(BasicObjectLock* value) const; | |
297 | |
298 // Tells whether the current interpreter_frame frame pointer | |
299 // corresponds to the old compiled/deoptimized fp | |
300 // The receiver used to be a top level frame | |
301 bool interpreter_frame_equals_unpacked_fp(intptr_t* fp); | |
302 | |
303 // Return/result value from this interpreter frame | |
304 // If the method return type is T_OBJECT or T_ARRAY populates oop_result | |
305 // For other (non-T_VOID) the appropriate field in the jvalue is populated | |
306 // with the result value. | |
307 // Should only be called when at method exit when the method is not | |
308 // exiting due to an exception. | |
309 BasicType interpreter_frame_result(oop* oop_result, jvalue* value_result); | |
310 | |
311 public: | |
312 // Method & constant pool cache | |
313 methodOop interpreter_frame_method() const; | |
314 void interpreter_frame_set_method(methodOop method); | |
315 methodOop* interpreter_frame_method_addr() const; | |
316 constantPoolCacheOop* interpreter_frame_cache_addr() const; | |
317 | |
318 public: | |
319 // Entry frames | |
320 JavaCallWrapper* entry_frame_call_wrapper() const; | |
321 intptr_t* entry_frame_argument_at(int offset) const; | |
322 | |
323 // tells whether there is another chunk of Delta stack above | |
324 bool entry_frame_is_first() const; | |
325 | |
326 // Compiled frames: | |
327 | |
328 public: | |
329 // Given the index of a local, and the number of argument words | |
330 // in this stack frame, tell which word of the stack frame to find | |
331 // the local in. Arguments are stored above the ofp/rpc pair, | |
332 // while other locals are stored below it. | |
333 // Since monitors (BasicLock blocks) are also assigned indexes, | |
334 // but may have different storage requirements, their presence | |
335 // can also affect the calculation of offsets. | |
336 static int local_offset_for_compiler(int local_index, int nof_args, int max_nof_locals, int max_nof_monitors); | |
337 | |
338 // Given the index of a monitor, etc., tell which word of the | |
339 // stack frame contains the start of the BasicLock block. | |
340 // Note that the local index by convention is the __higher__ | |
341 // of the two indexes allocated to the block. | |
342 static int monitor_offset_for_compiler(int local_index, int nof_args, int max_nof_locals, int max_nof_monitors); | |
343 | |
344 // Tell the smallest value that local_offset_for_compiler will attain. | |
345 // This is used to help determine how much stack frame to allocate. | |
346 static int min_local_offset_for_compiler(int nof_args, int max_nof_locals, int max_nof_monitors); | |
347 | |
348 // Tells if this register must be spilled during a call. | |
349 // On Intel, all registers are smashed by calls. | |
350 static bool volatile_across_calls(Register reg); | |
351 | |
352 | |
353 // Safepoints | |
354 | |
355 public: | |
356 oop saved_oop_result(RegisterMap* map) const; | |
357 void set_saved_oop_result(RegisterMap* map, oop obj); | |
358 | |
359 // For debugging | |
360 private: | |
361 const char* print_name() const; | |
362 | |
363 public: | |
364 void print_value() const { print_value_on(tty,NULL); } | |
365 void print_value_on(outputStream* st, JavaThread *thread) const; | |
366 void print_on(outputStream* st) const; | |
367 void interpreter_frame_print_on(outputStream* st) const; | |
368 void print_on_error(outputStream* st, char* buf, int buflen, bool verbose = false) const; | |
369 | |
370 // Conversion from an VMReg to physical stack location | |
371 oop* oopmapreg_to_location(VMReg reg, const RegisterMap* regmap) const; | |
372 | |
373 // Oops-do's | |
374 void oops_compiled_arguments_do(symbolHandle signature, bool is_static, const RegisterMap* reg_map, OopClosure* f); | |
375 void oops_interpreted_do(OopClosure* f, const RegisterMap* map, bool query_oop_map_cache = true); | |
376 | |
377 private: | |
378 void oops_interpreted_locals_do(OopClosure *f, | |
379 int max_locals, | |
380 InterpreterOopMap *mask); | |
381 void oops_interpreted_expressions_do(OopClosure *f, symbolHandle signature, | |
382 bool is_static, int max_stack, int max_locals, | |
383 InterpreterOopMap *mask); | |
384 void oops_interpreted_arguments_do(symbolHandle signature, bool is_static, OopClosure* f); | |
385 | |
386 // Iteration of oops | |
387 void oops_do_internal(OopClosure* f, RegisterMap* map, bool use_interpreter_oop_map_cache); | |
388 void oops_entry_do(OopClosure* f, const RegisterMap* map); | |
389 void oops_code_blob_do(OopClosure* f, const RegisterMap* map); | |
390 int adjust_offset(methodOop method, int index); // helper for above fn | |
391 // Iteration of nmethods | |
392 void nmethods_code_blob_do(); | |
393 public: | |
394 // Memory management | |
395 void oops_do(OopClosure* f, RegisterMap* map) { oops_do_internal(f, map, true); } | |
396 void nmethods_do(); | |
397 | |
398 void gc_prologue(); | |
399 void gc_epilogue(); | |
400 void pd_gc_epilog(); | |
401 | |
402 # ifdef ENABLE_ZAP_DEAD_LOCALS | |
403 private: | |
404 class CheckValueClosure: public OopClosure { | |
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405 public: |
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406 void do_oop(oop* p); |
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407 void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
0 | 408 }; |
409 static CheckValueClosure _check_value; | |
410 | |
411 class CheckOopClosure: public OopClosure { | |
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412 public: |
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413 void do_oop(oop* p); |
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414 void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
0 | 415 }; |
416 static CheckOopClosure _check_oop; | |
417 | |
418 static void check_derived_oop(oop* base, oop* derived); | |
419 | |
420 class ZapDeadClosure: public OopClosure { | |
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421 public: |
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422 void do_oop(oop* p); |
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423 void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
0 | 424 }; |
425 static ZapDeadClosure _zap_dead; | |
426 | |
427 public: | |
428 // Zapping | |
429 void zap_dead_locals (JavaThread* thread, const RegisterMap* map); | |
430 void zap_dead_interpreted_locals(JavaThread* thread, const RegisterMap* map); | |
431 void zap_dead_compiled_locals (JavaThread* thread, const RegisterMap* map); | |
432 void zap_dead_entry_locals (JavaThread* thread, const RegisterMap* map); | |
433 void zap_dead_deoptimized_locals(JavaThread* thread, const RegisterMap* map); | |
434 # endif | |
435 // Verification | |
436 void verify(const RegisterMap* map); | |
437 static bool verify_return_pc(address x); | |
438 static bool is_bci(intptr_t bcx); | |
439 // Usage: | |
440 // assert(frame::verify_return_pc(return_address), "must be a return pc"); | |
441 | |
442 int pd_oop_map_offset_adjustment() const; | |
443 | |
444 # include "incls/_frame_pd.hpp.incl" | |
445 }; | |
446 | |
447 | |
448 // | |
449 // StackFrameStream iterates through the frames of a thread starting from | |
450 // top most frame. It automatically takes care of updating the location of | |
451 // all (callee-saved) registers. Notice: If a thread is stopped at | |
452 // a safepoint, all registers are saved, not only the callee-saved ones. | |
453 // | |
454 // Use: | |
455 // | |
456 // for(StackFrameStream fst(thread); !fst.is_done(); fst.next()) { | |
457 // ... | |
458 // } | |
459 // | |
460 class StackFrameStream : public StackObj { | |
461 private: | |
462 frame _fr; | |
463 RegisterMap _reg_map; | |
464 bool _is_done; | |
465 public: | |
466 StackFrameStream(JavaThread *thread, bool update = true); | |
467 | |
468 // Iteration | |
469 bool is_done() { return (_is_done) ? true : (_is_done = _fr.is_first_frame(), false); } | |
470 void next() { if (!_is_done) _fr = _fr.sender(&_reg_map); } | |
471 | |
472 // Query | |
473 frame *current() { return &_fr; } | |
474 RegisterMap* register_map() { return &_reg_map; } | |
475 }; |