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annotate src/cpu/x86/vm/cppInterpreter_x86.cpp @ 15898:c102edf38127
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author | Doug Simon <doug.simon@oracle.com> |
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date | Mon, 26 May 2014 12:55:17 +0200 |
parents | bd3237e0e18d |
children | d3f14809b051 2100bf712e2a |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2007, 2013, Oracle and/or its affiliates. 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
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26 #include "asm/macroAssembler.hpp" |
1972 | 27 #include "interpreter/bytecodeHistogram.hpp" |
28 #include "interpreter/cppInterpreter.hpp" | |
29 #include "interpreter/interpreter.hpp" | |
30 #include "interpreter/interpreterGenerator.hpp" | |
31 #include "interpreter/interpreterRuntime.hpp" | |
32 #include "oops/arrayOop.hpp" | |
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33 #include "oops/methodData.hpp" |
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34 #include "oops/method.hpp" |
1972 | 35 #include "oops/oop.inline.hpp" |
36 #include "prims/jvmtiExport.hpp" | |
37 #include "prims/jvmtiThreadState.hpp" | |
38 #include "runtime/arguments.hpp" | |
39 #include "runtime/deoptimization.hpp" | |
40 #include "runtime/frame.inline.hpp" | |
41 #include "runtime/interfaceSupport.hpp" | |
42 #include "runtime/sharedRuntime.hpp" | |
43 #include "runtime/stubRoutines.hpp" | |
44 #include "runtime/synchronizer.hpp" | |
45 #include "runtime/timer.hpp" | |
46 #include "runtime/vframeArray.hpp" | |
47 #include "utilities/debug.hpp" | |
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48 #include "utilities/macros.hpp" |
1972 | 49 #ifdef SHARK |
50 #include "shark/shark_globals.hpp" | |
51 #endif | |
0 | 52 |
53 #ifdef CC_INTERP | |
54 | |
55 // Routine exists to make tracebacks look decent in debugger | |
56 // while we are recursed in the frame manager/c++ interpreter. | |
57 // We could use an address in the frame manager but having | |
58 // frames look natural in the debugger is a plus. | |
59 extern "C" void RecursiveInterpreterActivation(interpreterState istate ) | |
60 { | |
61 // | |
62 ShouldNotReachHere(); | |
63 } | |
64 | |
65 | |
66 #define __ _masm-> | |
67 #define STATE(field_name) (Address(state, byte_offset_of(BytecodeInterpreter, field_name))) | |
68 | |
69 Label fast_accessor_slow_entry_path; // fast accessor methods need to be able to jmp to unsynchronized | |
70 // c++ interpreter entry point this holds that entry point label. | |
71 | |
304 | 72 // default registers for state and sender_sp |
73 // state and sender_sp are the same on 32bit because we have no choice. | |
74 // state could be rsi on 64bit but it is an arg reg and not callee save | |
75 // so r13 is better choice. | |
76 | |
77 const Register state = NOT_LP64(rsi) LP64_ONLY(r13); | |
78 const Register sender_sp_on_entry = NOT_LP64(rsi) LP64_ONLY(r13); | |
79 | |
0 | 80 // NEEDED for JVMTI? |
81 // address AbstractInterpreter::_remove_activation_preserving_args_entry; | |
82 | |
83 static address unctrap_frame_manager_entry = NULL; | |
84 | |
85 static address deopt_frame_manager_return_atos = NULL; | |
86 static address deopt_frame_manager_return_btos = NULL; | |
87 static address deopt_frame_manager_return_itos = NULL; | |
88 static address deopt_frame_manager_return_ltos = NULL; | |
89 static address deopt_frame_manager_return_ftos = NULL; | |
90 static address deopt_frame_manager_return_dtos = NULL; | |
91 static address deopt_frame_manager_return_vtos = NULL; | |
92 | |
93 int AbstractInterpreter::BasicType_as_index(BasicType type) { | |
94 int i = 0; | |
95 switch (type) { | |
96 case T_BOOLEAN: i = 0; break; | |
97 case T_CHAR : i = 1; break; | |
98 case T_BYTE : i = 2; break; | |
99 case T_SHORT : i = 3; break; | |
100 case T_INT : i = 4; break; | |
101 case T_VOID : i = 5; break; | |
102 case T_FLOAT : i = 8; break; | |
103 case T_LONG : i = 9; break; | |
104 case T_DOUBLE : i = 6; break; | |
105 case T_OBJECT : // fall through | |
106 case T_ARRAY : i = 7; break; | |
107 default : ShouldNotReachHere(); | |
108 } | |
109 assert(0 <= i && i < AbstractInterpreter::number_of_result_handlers, "index out of bounds"); | |
110 return i; | |
111 } | |
112 | |
113 // Is this pc anywhere within code owned by the interpreter? | |
114 // This only works for pc that might possibly be exposed to frame | |
115 // walkers. It clearly misses all of the actual c++ interpreter | |
116 // implementation | |
117 bool CppInterpreter::contains(address pc) { | |
118 return (_code->contains(pc) || | |
119 pc == CAST_FROM_FN_PTR(address, RecursiveInterpreterActivation)); | |
120 } | |
121 | |
122 | |
123 address CppInterpreterGenerator::generate_result_handler_for(BasicType type) { | |
124 address entry = __ pc(); | |
125 switch (type) { | |
126 case T_BOOLEAN: __ c2bool(rax); break; | |
127 case T_CHAR : __ andl(rax, 0xFFFF); break; | |
128 case T_BYTE : __ sign_extend_byte (rax); break; | |
129 case T_SHORT : __ sign_extend_short(rax); break; | |
130 case T_VOID : // fall thru | |
131 case T_LONG : // fall thru | |
132 case T_INT : /* nothing to do */ break; | |
304 | 133 |
0 | 134 case T_DOUBLE : |
135 case T_FLOAT : | |
304 | 136 { |
137 const Register t = InterpreterRuntime::SignatureHandlerGenerator::temp(); | |
138 __ pop(t); // remove return address first | |
0 | 139 // Must return a result for interpreter or compiler. In SSE |
140 // mode, results are returned in xmm0 and the FPU stack must | |
141 // be empty. | |
142 if (type == T_FLOAT && UseSSE >= 1) { | |
304 | 143 #ifndef _LP64 |
0 | 144 // Load ST0 |
145 __ fld_d(Address(rsp, 0)); | |
146 // Store as float and empty fpu stack | |
147 __ fstp_s(Address(rsp, 0)); | |
304 | 148 #endif // !_LP64 |
0 | 149 // and reload |
150 __ movflt(xmm0, Address(rsp, 0)); | |
151 } else if (type == T_DOUBLE && UseSSE >= 2 ) { | |
152 __ movdbl(xmm0, Address(rsp, 0)); | |
153 } else { | |
154 // restore ST0 | |
155 __ fld_d(Address(rsp, 0)); | |
156 } | |
157 // and pop the temp | |
304 | 158 __ addptr(rsp, 2 * wordSize); |
159 __ push(t); // restore return address | |
0 | 160 } |
161 break; | |
162 case T_OBJECT : | |
163 // retrieve result from frame | |
304 | 164 __ movptr(rax, STATE(_oop_temp)); |
0 | 165 // and verify it |
166 __ verify_oop(rax); | |
167 break; | |
168 default : ShouldNotReachHere(); | |
169 } | |
170 __ ret(0); // return from result handler | |
171 return entry; | |
172 } | |
173 | |
174 // tosca based result to c++ interpreter stack based result. | |
175 // Result goes to top of native stack. | |
176 | |
177 #undef EXTEND // SHOULD NOT BE NEEDED | |
178 address CppInterpreterGenerator::generate_tosca_to_stack_converter(BasicType type) { | |
179 // A result is in the tosca (abi result) from either a native method call or compiled | |
180 // code. Place this result on the java expression stack so C++ interpreter can use it. | |
181 address entry = __ pc(); | |
182 | |
183 const Register t = InterpreterRuntime::SignatureHandlerGenerator::temp(); | |
304 | 184 __ pop(t); // remove return address first |
0 | 185 switch (type) { |
186 case T_VOID: | |
187 break; | |
188 case T_BOOLEAN: | |
189 #ifdef EXTEND | |
190 __ c2bool(rax); | |
191 #endif | |
304 | 192 __ push(rax); |
0 | 193 break; |
194 case T_CHAR : | |
195 #ifdef EXTEND | |
196 __ andl(rax, 0xFFFF); | |
197 #endif | |
304 | 198 __ push(rax); |
0 | 199 break; |
200 case T_BYTE : | |
201 #ifdef EXTEND | |
202 __ sign_extend_byte (rax); | |
203 #endif | |
304 | 204 __ push(rax); |
0 | 205 break; |
206 case T_SHORT : | |
207 #ifdef EXTEND | |
208 __ sign_extend_short(rax); | |
209 #endif | |
304 | 210 __ push(rax); |
0 | 211 break; |
212 case T_LONG : | |
304 | 213 __ push(rdx); // pushes useless junk on 64bit |
214 __ push(rax); | |
0 | 215 break; |
216 case T_INT : | |
304 | 217 __ push(rax); |
0 | 218 break; |
219 case T_FLOAT : | |
304 | 220 // Result is in ST(0)/xmm0 |
221 __ subptr(rsp, wordSize); | |
0 | 222 if ( UseSSE < 1) { |
304 | 223 __ fstp_s(Address(rsp, 0)); |
0 | 224 } else { |
225 __ movflt(Address(rsp, 0), xmm0); | |
226 } | |
227 break; | |
228 case T_DOUBLE : | |
304 | 229 __ subptr(rsp, 2*wordSize); |
0 | 230 if ( UseSSE < 2 ) { |
304 | 231 __ fstp_d(Address(rsp, 0)); |
0 | 232 } else { |
233 __ movdbl(Address(rsp, 0), xmm0); | |
234 } | |
235 break; | |
236 case T_OBJECT : | |
237 __ verify_oop(rax); // verify it | |
304 | 238 __ push(rax); |
0 | 239 break; |
240 default : ShouldNotReachHere(); | |
241 } | |
242 __ jmp(t); // return from result handler | |
243 return entry; | |
244 } | |
245 | |
246 address CppInterpreterGenerator::generate_stack_to_stack_converter(BasicType type) { | |
247 // A result is in the java expression stack of the interpreted method that has just | |
248 // returned. Place this result on the java expression stack of the caller. | |
249 // | |
304 | 250 // The current interpreter activation in rsi/r13 is for the method just returning its |
0 | 251 // result. So we know that the result of this method is on the top of the current |
252 // execution stack (which is pre-pushed) and will be return to the top of the caller | |
253 // stack. The top of the callers stack is the bottom of the locals of the current | |
254 // activation. | |
255 // Because of the way activation are managed by the frame manager the value of rsp is | |
256 // below both the stack top of the current activation and naturally the stack top | |
257 // of the calling activation. This enable this routine to leave the return address | |
258 // to the frame manager on the stack and do a vanilla return. | |
259 // | |
304 | 260 // On entry: rsi/r13 - interpreter state of activation returning a (potential) result |
261 // On Return: rsi/r13 - unchanged | |
0 | 262 // rax - new stack top for caller activation (i.e. activation in _prev_link) |
263 // | |
264 // Can destroy rdx, rcx. | |
265 // | |
266 | |
267 address entry = __ pc(); | |
268 const Register t = InterpreterRuntime::SignatureHandlerGenerator::temp(); | |
269 switch (type) { | |
270 case T_VOID: | |
304 | 271 __ movptr(rax, STATE(_locals)); // pop parameters get new stack value |
272 __ addptr(rax, wordSize); // account for prepush before we return | |
0 | 273 break; |
274 case T_FLOAT : | |
275 case T_BOOLEAN: | |
276 case T_CHAR : | |
277 case T_BYTE : | |
278 case T_SHORT : | |
279 case T_INT : | |
280 // 1 word result | |
304 | 281 __ movptr(rdx, STATE(_stack)); |
282 __ movptr(rax, STATE(_locals)); // address for result | |
0 | 283 __ movl(rdx, Address(rdx, wordSize)); // get result |
304 | 284 __ movptr(Address(rax, 0), rdx); // and store it |
0 | 285 break; |
286 case T_LONG : | |
287 case T_DOUBLE : | |
288 // return top two words on current expression stack to caller's expression stack | |
289 // The caller's expression stack is adjacent to the current frame manager's intepretState | |
290 // except we allocated one extra word for this intepretState so we won't overwrite it | |
291 // when we return a two word result. | |
292 | |
304 | 293 __ movptr(rax, STATE(_locals)); // address for result |
294 __ movptr(rcx, STATE(_stack)); | |
295 __ subptr(rax, wordSize); // need addition word besides locals[0] | |
296 __ movptr(rdx, Address(rcx, 2*wordSize)); // get result word (junk in 64bit) | |
297 __ movptr(Address(rax, wordSize), rdx); // and store it | |
298 __ movptr(rdx, Address(rcx, wordSize)); // get result word | |
299 __ movptr(Address(rax, 0), rdx); // and store it | |
0 | 300 break; |
301 case T_OBJECT : | |
304 | 302 __ movptr(rdx, STATE(_stack)); |
303 __ movptr(rax, STATE(_locals)); // address for result | |
304 __ movptr(rdx, Address(rdx, wordSize)); // get result | |
0 | 305 __ verify_oop(rdx); // verify it |
304 | 306 __ movptr(Address(rax, 0), rdx); // and store it |
0 | 307 break; |
308 default : ShouldNotReachHere(); | |
309 } | |
310 __ ret(0); | |
311 return entry; | |
312 } | |
313 | |
314 address CppInterpreterGenerator::generate_stack_to_native_abi_converter(BasicType type) { | |
315 // A result is in the java expression stack of the interpreted method that has just | |
316 // returned. Place this result in the native abi that the caller expects. | |
317 // | |
318 // Similar to generate_stack_to_stack_converter above. Called at a similar time from the | |
319 // frame manager execept in this situation the caller is native code (c1/c2/call_stub) | |
320 // and so rather than return result onto caller's java expression stack we return the | |
321 // result in the expected location based on the native abi. | |
304 | 322 // On entry: rsi/r13 - interpreter state of activation returning a (potential) result |
323 // On Return: rsi/r13 - unchanged | |
0 | 324 // Other registers changed [rax/rdx/ST(0) as needed for the result returned] |
325 | |
326 address entry = __ pc(); | |
327 switch (type) { | |
328 case T_VOID: | |
329 break; | |
330 case T_BOOLEAN: | |
331 case T_CHAR : | |
332 case T_BYTE : | |
333 case T_SHORT : | |
334 case T_INT : | |
304 | 335 __ movptr(rdx, STATE(_stack)); // get top of stack |
0 | 336 __ movl(rax, Address(rdx, wordSize)); // get result word 1 |
337 break; | |
338 case T_LONG : | |
304 | 339 __ movptr(rdx, STATE(_stack)); // get top of stack |
340 __ movptr(rax, Address(rdx, wordSize)); // get result low word | |
341 NOT_LP64(__ movl(rdx, Address(rdx, 2*wordSize));) // get result high word | |
0 | 342 break; |
343 case T_FLOAT : | |
304 | 344 __ movptr(rdx, STATE(_stack)); // get top of stack |
0 | 345 if ( UseSSE >= 1) { |
346 __ movflt(xmm0, Address(rdx, wordSize)); | |
347 } else { | |
348 __ fld_s(Address(rdx, wordSize)); // pushd float result | |
349 } | |
350 break; | |
351 case T_DOUBLE : | |
304 | 352 __ movptr(rdx, STATE(_stack)); // get top of stack |
0 | 353 if ( UseSSE > 1) { |
354 __ movdbl(xmm0, Address(rdx, wordSize)); | |
355 } else { | |
356 __ fld_d(Address(rdx, wordSize)); // push double result | |
357 } | |
358 break; | |
359 case T_OBJECT : | |
304 | 360 __ movptr(rdx, STATE(_stack)); // get top of stack |
361 __ movptr(rax, Address(rdx, wordSize)); // get result word 1 | |
0 | 362 __ verify_oop(rax); // verify it |
363 break; | |
364 default : ShouldNotReachHere(); | |
365 } | |
366 __ ret(0); | |
367 return entry; | |
368 } | |
369 | |
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370 address CppInterpreter::return_entry(TosState state, int length, Bytecodes::Code code) { |
0 | 371 // make it look good in the debugger |
372 return CAST_FROM_FN_PTR(address, RecursiveInterpreterActivation); | |
373 } | |
374 | |
375 address CppInterpreter::deopt_entry(TosState state, int length) { | |
376 address ret = NULL; | |
377 if (length != 0) { | |
378 switch (state) { | |
379 case atos: ret = deopt_frame_manager_return_atos; break; | |
380 case btos: ret = deopt_frame_manager_return_btos; break; | |
381 case ctos: | |
382 case stos: | |
383 case itos: ret = deopt_frame_manager_return_itos; break; | |
384 case ltos: ret = deopt_frame_manager_return_ltos; break; | |
385 case ftos: ret = deopt_frame_manager_return_ftos; break; | |
386 case dtos: ret = deopt_frame_manager_return_dtos; break; | |
387 case vtos: ret = deopt_frame_manager_return_vtos; break; | |
388 } | |
389 } else { | |
390 ret = unctrap_frame_manager_entry; // re-execute the bytecode ( e.g. uncommon trap) | |
391 } | |
392 assert(ret != NULL, "Not initialized"); | |
393 return ret; | |
394 } | |
395 | |
396 // C++ Interpreter | |
397 void CppInterpreterGenerator::generate_compute_interpreter_state(const Register state, | |
398 const Register locals, | |
399 const Register sender_sp, | |
400 bool native) { | |
401 | |
402 // On entry the "locals" argument points to locals[0] (or where it would be in case no locals in | |
403 // a static method). "state" contains any previous frame manager state which we must save a link | |
404 // to in the newly generated state object. On return "state" is a pointer to the newly allocated | |
405 // state object. We must allocate and initialize a new interpretState object and the method | |
406 // expression stack. Because the returned result (if any) of the method will be placed on the caller's | |
407 // expression stack and this will overlap with locals[0] (and locals[1] if double/long) we must | |
408 // be sure to leave space on the caller's stack so that this result will not overwrite values when | |
409 // locals[0] and locals[1] do not exist (and in fact are return address and saved rbp). So when | |
410 // we are non-native we in essence ensure that locals[0-1] exist. We play an extra trick in | |
411 // non-product builds and initialize this last local with the previous interpreterState as | |
412 // this makes things look real nice in the debugger. | |
413 | |
414 // State on entry | |
415 // Assumes locals == &locals[0] | |
416 // Assumes state == any previous frame manager state (assuming call path from c++ interpreter) | |
417 // Assumes rax = return address | |
418 // rcx == senders_sp | |
419 // rbx == method | |
420 // Modifies rcx, rdx, rax | |
421 // Returns: | |
422 // state == address of new interpreterState | |
423 // rsp == bottom of method's expression stack. | |
424 | |
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425 const Address const_offset (rbx, Method::const_offset()); |
0 | 426 |
427 | |
428 // On entry sp is the sender's sp. This includes the space for the arguments | |
429 // that the sender pushed. If the sender pushed no args (a static) and the | |
430 // caller returns a long then we need two words on the sender's stack which | |
431 // are not present (although when we return a restore full size stack the | |
432 // space will be present). If we didn't allocate two words here then when | |
433 // we "push" the result of the caller's stack we would overwrite the return | |
434 // address and the saved rbp. Not good. So simply allocate 2 words now | |
435 // just to be safe. This is the "static long no_params() method" issue. | |
436 // See Lo.java for a testcase. | |
437 // We don't need this for native calls because they return result in | |
438 // register and the stack is expanded in the caller before we store | |
439 // the results on the stack. | |
440 | |
441 if (!native) { | |
442 #ifdef PRODUCT | |
304 | 443 __ subptr(rsp, 2*wordSize); |
0 | 444 #else /* PRODUCT */ |
304 | 445 __ push((int32_t)NULL_WORD); |
446 __ push(state); // make it look like a real argument | |
0 | 447 #endif /* PRODUCT */ |
448 } | |
449 | |
450 // Now that we are assure of space for stack result, setup typical linkage | |
451 | |
304 | 452 __ push(rax); |
0 | 453 __ enter(); |
454 | |
304 | 455 __ mov(rax, state); // save current state |
456 | |
457 __ lea(rsp, Address(rsp, -(int)sizeof(BytecodeInterpreter))); | |
458 __ mov(state, rsp); | |
459 | |
460 // rsi/r13 == state/locals rax == prevstate | |
0 | 461 |
462 // initialize the "shadow" frame so that use since C++ interpreter not directly | |
463 // recursive. Simpler to recurse but we can't trim expression stack as we call | |
464 // new methods. | |
304 | 465 __ movptr(STATE(_locals), locals); // state->_locals = locals() |
466 __ movptr(STATE(_self_link), state); // point to self | |
467 __ movptr(STATE(_prev_link), rax); // state->_link = state on entry (NULL or previous state) | |
468 __ movptr(STATE(_sender_sp), sender_sp); // state->_sender_sp = sender_sp | |
469 #ifdef _LP64 | |
470 __ movptr(STATE(_thread), r15_thread); // state->_bcp = codes() | |
471 #else | |
0 | 472 __ get_thread(rax); // get vm's javathread* |
304 | 473 __ movptr(STATE(_thread), rax); // state->_bcp = codes() |
474 #endif // _LP64 | |
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475 __ movptr(rdx, Address(rbx, Method::const_offset())); // get constantMethodOop |
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476 __ lea(rdx, Address(rdx, ConstMethod::codes_offset())); // get code base |
0 | 477 if (native) { |
304 | 478 __ movptr(STATE(_bcp), (int32_t)NULL_WORD); // state->_bcp = NULL |
0 | 479 } else { |
304 | 480 __ movptr(STATE(_bcp), rdx); // state->_bcp = codes() |
0 | 481 } |
304 | 482 __ xorptr(rdx, rdx); |
483 __ movptr(STATE(_oop_temp), rdx); // state->_oop_temp = NULL (only really needed for native) | |
484 __ movptr(STATE(_mdx), rdx); // state->_mdx = NULL | |
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485 __ movptr(rdx, Address(rbx, Method::const_offset())); |
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486 __ movptr(rdx, Address(rdx, ConstMethod::constants_offset())); |
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487 __ movptr(rdx, Address(rdx, ConstantPool::cache_offset_in_bytes())); |
304 | 488 __ movptr(STATE(_constants), rdx); // state->_constants = constants() |
489 | |
490 __ movptr(STATE(_method), rbx); // state->_method = method() | |
491 __ movl(STATE(_msg), (int32_t) BytecodeInterpreter::method_entry); // state->_msg = initial method entry | |
492 __ movptr(STATE(_result._to_call._callee), (int32_t) NULL_WORD); // state->_result._to_call._callee_callee = NULL | |
493 | |
494 | |
495 __ movptr(STATE(_monitor_base), rsp); // set monitor block bottom (grows down) this would point to entry [0] | |
0 | 496 // entries run from -1..x where &monitor[x] == |
497 | |
498 { | |
499 // Must not attempt to lock method until we enter interpreter as gc won't be able to find the | |
500 // initial frame. However we allocate a free monitor so we don't have to shuffle the expression stack | |
501 // immediately. | |
502 | |
503 // synchronize method | |
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504 const Address access_flags (rbx, Method::access_flags_offset()); |
0 | 505 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize; |
506 Label not_synced; | |
507 | |
508 __ movl(rax, access_flags); | |
509 __ testl(rax, JVM_ACC_SYNCHRONIZED); | |
510 __ jcc(Assembler::zero, not_synced); | |
511 | |
512 // Allocate initial monitor and pre initialize it | |
513 // get synchronization object | |
514 | |
515 Label done; | |
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516 const int mirror_offset = in_bytes(Klass::java_mirror_offset()); |
0 | 517 __ movl(rax, access_flags); |
518 __ testl(rax, JVM_ACC_STATIC); | |
304 | 519 __ movptr(rax, Address(locals, 0)); // get receiver (assume this is frequent case) |
0 | 520 __ jcc(Assembler::zero, done); |
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521 __ movptr(rax, Address(rbx, Method::const_offset())); |
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522 __ movptr(rax, Address(rax, ConstMethod::constants_offset())); |
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523 __ movptr(rax, Address(rax, ConstantPool::pool_holder_offset_in_bytes())); |
304 | 524 __ movptr(rax, Address(rax, mirror_offset)); |
0 | 525 __ bind(done); |
526 // add space for monitor & lock | |
304 | 527 __ subptr(rsp, entry_size); // add space for a monitor entry |
528 __ movptr(Address(rsp, BasicObjectLock::obj_offset_in_bytes()), rax); // store object | |
0 | 529 __ bind(not_synced); |
530 } | |
531 | |
304 | 532 __ movptr(STATE(_stack_base), rsp); // set expression stack base ( == &monitors[-count]) |
0 | 533 if (native) { |
304 | 534 __ movptr(STATE(_stack), rsp); // set current expression stack tos |
535 __ movptr(STATE(_stack_limit), rsp); | |
0 | 536 } else { |
304 | 537 __ subptr(rsp, wordSize); // pre-push stack |
538 __ movptr(STATE(_stack), rsp); // set current expression stack tos | |
0 | 539 |
540 // compute full expression stack limit | |
541 | |
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542 __ movptr(rdx, Address(rbx, Method::const_offset())); |
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543 __ load_unsigned_short(rdx, Address(rdx, ConstMethod::max_stack_offset())); // get size of expression stack in words |
304 | 544 __ negptr(rdx); // so we can subtract in next step |
0 | 545 // Allocate expression stack |
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546 __ lea(rsp, Address(rsp, rdx, Address::times_ptr, -Method::extra_stack_words())); |
304 | 547 __ movptr(STATE(_stack_limit), rsp); |
0 | 548 } |
549 | |
304 | 550 #ifdef _LP64 |
551 // Make sure stack is properly aligned and sized for the abi | |
552 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows | |
605 | 553 __ andptr(rsp, -16); // must be 16 byte boundary (see amd64 ABI) |
304 | 554 #endif // _LP64 |
555 | |
556 | |
557 | |
0 | 558 } |
559 | |
560 // Helpers for commoning out cases in the various type of method entries. | |
561 // | |
562 | |
563 // increment invocation count & check for overflow | |
564 // | |
565 // Note: checking for negative value instead of overflow | |
566 // so we have a 'sticky' overflow test | |
567 // | |
568 // rbx,: method | |
569 // rcx: invocation counter | |
570 // | |
571 void InterpreterGenerator::generate_counter_incr(Label* overflow, Label* profile_method, Label* profile_method_continue) { | |
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572 Label done; |
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573 const Address invocation_counter(rax, |
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574 MethodCounters::invocation_counter_offset() + |
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575 InvocationCounter::counter_offset()); |
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576 const Address backedge_counter (rax, |
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577 MethodCounter::backedge_counter_offset() + |
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578 InvocationCounter::counter_offset()); |
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579 |
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580 __ get_method_counters(rbx, rax, done); |
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581 |
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582 if (ProfileInterpreter) { |
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583 __ incrementl(Address(rax, |
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584 MethodCounters::interpreter_invocation_counter_offset())); |
0 | 585 } |
586 // Update standard invocation counters | |
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587 __ movl(rcx, invocation_counter); |
0 | 588 __ increment(rcx, InvocationCounter::count_increment); |
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589 __ movl(invocation_counter, rcx); // save invocation count |
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590 |
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591 __ movl(rax, backedge_counter); // load backedge counter |
0 | 592 __ andl(rax, InvocationCounter::count_mask_value); // mask out the status bits |
593 | |
594 __ addl(rcx, rax); // add both counters | |
595 | |
596 // profile_method is non-null only for interpreted method so | |
597 // profile_method != NULL == !native_call | |
598 // BytecodeInterpreter only calls for native so code is elided. | |
599 | |
600 __ cmp32(rcx, | |
601 ExternalAddress((address)&InvocationCounter::InterpreterInvocationLimit)); | |
602 __ jcc(Assembler::aboveEqual, *overflow); | |
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603 __ bind(done); |
0 | 604 } |
605 | |
606 void InterpreterGenerator::generate_counter_overflow(Label* do_continue) { | |
607 | |
608 // C++ interpreter on entry | |
304 | 609 // rsi/r13 - new interpreter state pointer |
0 | 610 // rbp - interpreter frame pointer |
611 // rbx - method | |
612 | |
613 // On return (i.e. jump to entry_point) [ back to invocation of interpreter ] | |
614 // rbx, - method | |
615 // rcx - rcvr (assuming there is one) | |
616 // top of stack return address of interpreter caller | |
617 // rsp - sender_sp | |
618 | |
619 // C++ interpreter only | |
304 | 620 // rsi/r13 - previous interpreter state pointer |
0 | 621 |
622 // InterpreterRuntime::frequency_counter_overflow takes one argument | |
623 // indicating if the counter overflow occurs at a backwards branch (non-NULL bcp). | |
624 // The call returns the address of the verified entry point for the method or NULL | |
625 // if the compilation did not complete (either went background or bailed out). | |
304 | 626 __ movptr(rax, (int32_t)false); |
0 | 627 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::frequency_counter_overflow), rax); |
628 | |
629 // for c++ interpreter can rsi really be munged? | |
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630 __ lea(state, Address(rbp, -(int)sizeof(BytecodeInterpreter))); // restore state |
304 | 631 __ movptr(rbx, Address(state, byte_offset_of(BytecodeInterpreter, _method))); // restore method |
632 __ movptr(rdi, Address(state, byte_offset_of(BytecodeInterpreter, _locals))); // get locals pointer | |
633 | |
0 | 634 __ jmp(*do_continue, relocInfo::none); |
635 | |
636 } | |
637 | |
638 void InterpreterGenerator::generate_stack_overflow_check(void) { | |
639 // see if we've got enough room on the stack for locals plus overhead. | |
640 // the expression stack grows down incrementally, so the normal guard | |
641 // page mechanism will work for that. | |
642 // | |
643 // Registers live on entry: | |
644 // | |
645 // Asm interpreter | |
646 // rdx: number of additional locals this frame needs (what we must check) | |
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647 // rbx,: Method* |
0 | 648 |
649 // C++ Interpreter | |
304 | 650 // rsi/r13: previous interpreter frame state object |
0 | 651 // rdi: &locals[0] |
652 // rcx: # of locals | |
653 // rdx: number of additional locals this frame needs (what we must check) | |
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654 // rbx: Method* |
0 | 655 |
656 // destroyed on exit | |
657 // rax, | |
658 | |
659 // NOTE: since the additional locals are also always pushed (wasn't obvious in | |
660 // generate_method_entry) so the guard should work for them too. | |
661 // | |
662 | |
663 // monitor entry size: see picture of stack set (generate_method_entry) and frame_i486.hpp | |
664 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize; | |
665 | |
666 // total overhead size: entry_size + (saved rbp, thru expr stack bottom). | |
667 // be sure to change this if you add/subtract anything to/from the overhead area | |
668 const int overhead_size = (int)sizeof(BytecodeInterpreter); | |
669 | |
670 const int page_size = os::vm_page_size(); | |
671 | |
672 Label after_frame_check; | |
673 | |
674 // compute rsp as if this were going to be the last frame on | |
675 // the stack before the red zone | |
676 | |
677 Label after_frame_check_pop; | |
678 | |
679 // save rsi == caller's bytecode ptr (c++ previous interp. state) | |
680 // QQQ problem here?? rsi overload???? | |
304 | 681 __ push(state); |
682 | |
683 const Register thread = LP64_ONLY(r15_thread) NOT_LP64(rsi); | |
684 | |
685 NOT_LP64(__ get_thread(thread)); | |
0 | 686 |
687 const Address stack_base(thread, Thread::stack_base_offset()); | |
688 const Address stack_size(thread, Thread::stack_size_offset()); | |
689 | |
690 // locals + overhead, in bytes | |
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691 // Always give one monitor to allow us to start interp if sync method. |
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692 // Any additional monitors need a check when moving the expression stack |
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693 const int one_monitor = frame::interpreter_frame_monitor_size() * wordSize; |
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694 __ movptr(rax, Address(rbx, Method::const_offset())); |
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695 __ load_unsigned_short(rax, Address(rax, ConstMethod::max_stack_offset())); // get size of expression stack in words |
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696 __ lea(rax, Address(noreg, rax, Interpreter::stackElementScale(), one_monitor+Method::extra_stack_words())); |
304 | 697 __ lea(rax, Address(rax, rdx, Interpreter::stackElementScale(), overhead_size)); |
0 | 698 |
699 #ifdef ASSERT | |
700 Label stack_base_okay, stack_size_okay; | |
701 // verify that thread stack base is non-zero | |
304 | 702 __ cmpptr(stack_base, (int32_t)0); |
0 | 703 __ jcc(Assembler::notEqual, stack_base_okay); |
704 __ stop("stack base is zero"); | |
705 __ bind(stack_base_okay); | |
706 // verify that thread stack size is non-zero | |
304 | 707 __ cmpptr(stack_size, (int32_t)0); |
0 | 708 __ jcc(Assembler::notEqual, stack_size_okay); |
709 __ stop("stack size is zero"); | |
710 __ bind(stack_size_okay); | |
711 #endif | |
712 | |
713 // Add stack base to locals and subtract stack size | |
304 | 714 __ addptr(rax, stack_base); |
715 __ subptr(rax, stack_size); | |
0 | 716 |
717 // We should have a magic number here for the size of the c++ interpreter frame. | |
718 // We can't actually tell this ahead of time. The debug version size is around 3k | |
719 // product is 1k and fastdebug is 4k | |
720 const int slop = 6 * K; | |
721 | |
722 // Use the maximum number of pages we might bang. | |
723 const int max_pages = StackShadowPages > (StackRedPages+StackYellowPages) ? StackShadowPages : | |
724 (StackRedPages+StackYellowPages); | |
725 // Only need this if we are stack banging which is temporary while | |
726 // we're debugging. | |
304 | 727 __ addptr(rax, slop + 2*max_pages * page_size); |
0 | 728 |
729 // check against the current stack bottom | |
304 | 730 __ cmpptr(rsp, rax); |
0 | 731 __ jcc(Assembler::above, after_frame_check_pop); |
732 | |
304 | 733 __ pop(state); // get c++ prev state. |
0 | 734 |
735 // throw exception return address becomes throwing pc | |
736 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_StackOverflowError)); | |
737 | |
738 // all done with frame size check | |
739 __ bind(after_frame_check_pop); | |
304 | 740 __ pop(state); |
0 | 741 |
742 __ bind(after_frame_check); | |
743 } | |
744 | |
745 // Find preallocated monitor and lock method (C++ interpreter) | |
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746 // rbx - Method* |
0 | 747 // |
748 void InterpreterGenerator::lock_method(void) { | |
304 | 749 // assumes state == rsi/r13 == pointer to current interpreterState |
750 // minimally destroys rax, rdx|c_rarg1, rdi | |
0 | 751 // |
752 // synchronize method | |
753 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize; | |
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754 const Address access_flags (rbx, Method::access_flags_offset()); |
0 | 755 |
304 | 756 const Register monitor = NOT_LP64(rdx) LP64_ONLY(c_rarg1); |
757 | |
0 | 758 // find initial monitor i.e. monitors[-1] |
304 | 759 __ movptr(monitor, STATE(_monitor_base)); // get monitor bottom limit |
760 __ subptr(monitor, entry_size); // point to initial monitor | |
0 | 761 |
762 #ifdef ASSERT | |
763 { Label L; | |
764 __ movl(rax, access_flags); | |
765 __ testl(rax, JVM_ACC_SYNCHRONIZED); | |
766 __ jcc(Assembler::notZero, L); | |
767 __ stop("method doesn't need synchronization"); | |
768 __ bind(L); | |
769 } | |
770 #endif // ASSERT | |
771 // get synchronization object | |
772 { Label done; | |
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773 const int mirror_offset = in_bytes(Klass::java_mirror_offset()); |
0 | 774 __ movl(rax, access_flags); |
304 | 775 __ movptr(rdi, STATE(_locals)); // prepare to get receiver (assume common case) |
0 | 776 __ testl(rax, JVM_ACC_STATIC); |
304 | 777 __ movptr(rax, Address(rdi, 0)); // get receiver (assume this is frequent case) |
0 | 778 __ jcc(Assembler::zero, done); |
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779 __ movptr(rax, Address(rbx, Method::const_offset())); |
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780 __ movptr(rax, Address(rax, ConstMethod::constants_offset())); |
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781 __ movptr(rax, Address(rax, ConstantPool::pool_holder_offset_in_bytes())); |
304 | 782 __ movptr(rax, Address(rax, mirror_offset)); |
0 | 783 __ bind(done); |
784 } | |
785 #ifdef ASSERT | |
786 { Label L; | |
304 | 787 __ cmpptr(rax, Address(monitor, BasicObjectLock::obj_offset_in_bytes())); // correct object? |
0 | 788 __ jcc(Assembler::equal, L); |
789 __ stop("wrong synchronization lobject"); | |
790 __ bind(L); | |
791 } | |
792 #endif // ASSERT | |
304 | 793 // can destroy rax, rdx|c_rarg1, rcx, and (via call_VM) rdi! |
794 __ lock_object(monitor); | |
0 | 795 } |
796 | |
797 // Call an accessor method (assuming it is resolved, otherwise drop into vanilla (slow path) entry | |
798 | |
799 address InterpreterGenerator::generate_accessor_entry(void) { | |
800 | |
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801 // rbx: Method* |
304 | 802 |
803 // rsi/r13: senderSP must preserved for slow path, set SP to it on fast path | |
0 | 804 |
805 Label xreturn_path; | |
806 | |
807 // do fastpath for resolved accessor methods | |
808 if (UseFastAccessorMethods) { | |
809 | |
810 address entry_point = __ pc(); | |
811 | |
812 Label slow_path; | |
813 // If we need a safepoint check, generate full interpreter entry. | |
814 ExternalAddress state(SafepointSynchronize::address_of_state()); | |
815 __ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()), | |
816 SafepointSynchronize::_not_synchronized); | |
817 | |
818 __ jcc(Assembler::notEqual, slow_path); | |
819 // ASM/C++ Interpreter | |
820 // Code: _aload_0, _(i|a)getfield, _(i|a)return or any rewrites thereof; parameter size = 1 | |
821 // Note: We can only use this code if the getfield has been resolved | |
822 // and if we don't have a null-pointer exception => check for | |
823 // these conditions first and use slow path if necessary. | |
824 // rbx,: method | |
825 // rcx: receiver | |
304 | 826 __ movptr(rax, Address(rsp, wordSize)); |
0 | 827 |
828 // check if local 0 != NULL and read field | |
304 | 829 __ testptr(rax, rax); |
0 | 830 __ jcc(Assembler::zero, slow_path); |
831 | |
832 // read first instruction word and extract bytecode @ 1 and index @ 2 | |
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833 __ movptr(rdx, Address(rbx, Method::const_offset())); |
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834 __ movptr(rdi, Address(rdx, ConstMethod::constants_offset())); |
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835 __ movl(rdx, Address(rdx, ConstMethod::codes_offset())); |
0 | 836 // Shift codes right to get the index on the right. |
837 // The bytecode fetched looks like <index><0xb4><0x2a> | |
838 __ shrl(rdx, 2*BitsPerByte); | |
839 __ shll(rdx, exact_log2(in_words(ConstantPoolCacheEntry::size()))); | |
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840 __ movptr(rdi, Address(rdi, ConstantPool::cache_offset_in_bytes())); |
0 | 841 |
842 // rax,: local 0 | |
843 // rbx,: method | |
844 // rcx: receiver - do not destroy since it is needed for slow path! | |
845 // rcx: scratch | |
846 // rdx: constant pool cache index | |
847 // rdi: constant pool cache | |
304 | 848 // rsi/r13: sender sp |
0 | 849 |
850 // check if getfield has been resolved and read constant pool cache entry | |
851 // check the validity of the cache entry by testing whether _indices field | |
852 // contains Bytecode::_getfield in b1 byte. | |
853 assert(in_words(ConstantPoolCacheEntry::size()) == 4, "adjust shift below"); | |
854 __ movl(rcx, | |
855 Address(rdi, | |
856 rdx, | |
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857 Address::times_ptr, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::indices_offset())); |
0 | 858 __ shrl(rcx, 2*BitsPerByte); |
859 __ andl(rcx, 0xFF); | |
860 __ cmpl(rcx, Bytecodes::_getfield); | |
861 __ jcc(Assembler::notEqual, slow_path); | |
862 | |
863 // Note: constant pool entry is not valid before bytecode is resolved | |
304 | 864 __ movptr(rcx, |
0 | 865 Address(rdi, |
866 rdx, | |
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867 Address::times_ptr, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::f2_offset())); |
0 | 868 __ movl(rdx, |
869 Address(rdi, | |
870 rdx, | |
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871 Address::times_ptr, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::flags_offset())); |
0 | 872 |
873 Label notByte, notShort, notChar; | |
874 const Address field_address (rax, rcx, Address::times_1); | |
875 | |
876 // Need to differentiate between igetfield, agetfield, bgetfield etc. | |
877 // because they are different sizes. | |
878 // Use the type from the constant pool cache | |
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879 __ shrl(rdx, ConstantPoolCacheEntry::tos_state_shift); |
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880 // Make sure we don't need to mask rdx after the above shift |
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881 ConstantPoolCacheEntry::verify_tos_state_shift(); |
304 | 882 #ifdef _LP64 |
883 Label notObj; | |
884 __ cmpl(rdx, atos); | |
885 __ jcc(Assembler::notEqual, notObj); | |
886 // atos | |
887 __ movptr(rax, field_address); | |
888 __ jmp(xreturn_path); | |
889 | |
890 __ bind(notObj); | |
891 #endif // _LP64 | |
0 | 892 __ cmpl(rdx, btos); |
893 __ jcc(Assembler::notEqual, notByte); | |
894 __ load_signed_byte(rax, field_address); | |
895 __ jmp(xreturn_path); | |
896 | |
897 __ bind(notByte); | |
898 __ cmpl(rdx, stos); | |
899 __ jcc(Assembler::notEqual, notShort); | |
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900 __ load_signed_short(rax, field_address); |
0 | 901 __ jmp(xreturn_path); |
902 | |
903 __ bind(notShort); | |
904 __ cmpl(rdx, ctos); | |
905 __ jcc(Assembler::notEqual, notChar); | |
622
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906 __ load_unsigned_short(rax, field_address); |
0 | 907 __ jmp(xreturn_path); |
908 | |
909 __ bind(notChar); | |
910 #ifdef ASSERT | |
911 Label okay; | |
304 | 912 #ifndef _LP64 |
0 | 913 __ cmpl(rdx, atos); |
914 __ jcc(Assembler::equal, okay); | |
304 | 915 #endif // _LP64 |
0 | 916 __ cmpl(rdx, itos); |
917 __ jcc(Assembler::equal, okay); | |
918 __ stop("what type is this?"); | |
919 __ bind(okay); | |
920 #endif // ASSERT | |
921 // All the rest are a 32 bit wordsize | |
922 __ movl(rax, field_address); | |
923 | |
924 __ bind(xreturn_path); | |
925 | |
926 // _ireturn/_areturn | |
304 | 927 __ pop(rdi); // get return address |
928 __ mov(rsp, sender_sp_on_entry); // set sp to sender sp | |
0 | 929 __ jmp(rdi); |
930 | |
931 // generate a vanilla interpreter entry as the slow path | |
932 __ bind(slow_path); | |
933 // We will enter c++ interpreter looking like it was | |
934 // called by the call_stub this will cause it to return | |
935 // a tosca result to the invoker which might have been | |
936 // the c++ interpreter itself. | |
937 | |
938 __ jmp(fast_accessor_slow_entry_path); | |
939 return entry_point; | |
940 | |
941 } else { | |
942 return NULL; | |
943 } | |
944 | |
945 } | |
946 | |
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947 address InterpreterGenerator::generate_Reference_get_entry(void) { |
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948 #if INCLUDE_ALL_GCS |
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949 if (UseG1GC) { |
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950 // We need to generate have a routine that generates code to: |
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951 // * load the value in the referent field |
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952 // * passes that value to the pre-barrier. |
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953 // |
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954 // In the case of G1 this will record the value of the |
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955 // referent in an SATB buffer if marking is active. |
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956 // This will cause concurrent marking to mark the referent |
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957 // field as live. |
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958 Unimplemented(); |
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959 } |
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960 #endif // INCLUDE_ALL_GCS |
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961 |
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962 // If G1 is not enabled then attempt to go through the accessor entry point |
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963 // Reference.get is an accessor |
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964 return generate_accessor_entry(); |
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965 } |
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966 |
0 | 967 // |
968 // C++ Interpreter stub for calling a native method. | |
969 // This sets up a somewhat different looking stack for calling the native method | |
970 // than the typical interpreter frame setup but still has the pointer to | |
971 // an interpreter state. | |
972 // | |
973 | |
974 address InterpreterGenerator::generate_native_entry(bool synchronized) { | |
975 // determine code generation flags | |
976 bool inc_counter = UseCompiler || CountCompiledCalls; | |
977 | |
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978 // rbx: Method* |
0 | 979 // rcx: receiver (unused) |
304 | 980 // rsi/r13: previous interpreter state (if called from C++ interpreter) must preserve |
981 // in any case. If called via c1/c2/call_stub rsi/r13 is junk (to use) but harmless | |
0 | 982 // to save/restore. |
983 address entry_point = __ pc(); | |
984 | |
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985 const Address constMethod (rbx, Method::const_offset()); |
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986 const Address access_flags (rbx, Method::access_flags_offset()); |
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987 const Address size_of_parameters(rcx, ConstMethod::size_of_parameters_offset()); |
0 | 988 |
304 | 989 // rsi/r13 == state/locals rdi == prevstate |
0 | 990 const Register locals = rdi; |
991 | |
992 // get parameter size (always needed) | |
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993 __ movptr(rcx, constMethod); |
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994 __ load_unsigned_short(rcx, size_of_parameters); |
0 | 995 |
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996 // rbx: Method* |
0 | 997 // rcx: size of parameters |
304 | 998 __ pop(rax); // get return address |
0 | 999 // for natives the size of locals is zero |
1000 | |
1001 // compute beginning of parameters /locals | |
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1002 |
304 | 1003 __ lea(locals, Address(rsp, rcx, Address::times_ptr, -wordSize)); |
0 | 1004 |
1005 // initialize fixed part of activation frame | |
1006 | |
1007 // Assumes rax = return address | |
1008 | |
1009 // allocate and initialize new interpreterState and method expression stack | |
1010 // IN(locals) -> locals | |
1011 // IN(state) -> previous frame manager state (NULL from stub/c1/c2) | |
1012 // destroys rax, rcx, rdx | |
1013 // OUT (state) -> new interpreterState | |
1014 // OUT(rsp) -> bottom of methods expression stack | |
1015 | |
1016 // save sender_sp | |
304 | 1017 __ mov(rcx, sender_sp_on_entry); |
0 | 1018 // start with NULL previous state |
304 | 1019 __ movptr(state, (int32_t)NULL_WORD); |
0 | 1020 generate_compute_interpreter_state(state, locals, rcx, true); |
1021 | |
1022 #ifdef ASSERT | |
1023 { Label L; | |
304 | 1024 __ movptr(rax, STATE(_stack_base)); |
1025 #ifdef _LP64 | |
1026 // duplicate the alignment rsp got after setting stack_base | |
1027 __ subptr(rax, frame::arg_reg_save_area_bytes); // windows | |
605 | 1028 __ andptr(rax, -16); // must be 16 byte boundary (see amd64 ABI) |
304 | 1029 #endif // _LP64 |
1030 __ cmpptr(rax, rsp); | |
0 | 1031 __ jcc(Assembler::equal, L); |
1032 __ stop("broken stack frame setup in interpreter"); | |
1033 __ bind(L); | |
1034 } | |
1035 #endif | |
1036 | |
304 | 1037 const Register unlock_thread = LP64_ONLY(r15_thread) NOT_LP64(rax); |
1038 NOT_LP64(__ movptr(unlock_thread, STATE(_thread));) // get thread | |
0 | 1039 // Since at this point in the method invocation the exception handler |
1040 // would try to exit the monitor of synchronized methods which hasn't | |
1041 // been entered yet, we set the thread local variable | |
1042 // _do_not_unlock_if_synchronized to true. The remove_activation will | |
1043 // check this flag. | |
1044 | |
304 | 1045 const Address do_not_unlock_if_synchronized(unlock_thread, |
0 | 1046 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset())); |
1047 __ movbool(do_not_unlock_if_synchronized, true); | |
1048 | |
1049 // make sure method is native & not abstract | |
1050 #ifdef ASSERT | |
1051 __ movl(rax, access_flags); | |
1052 { | |
1053 Label L; | |
1054 __ testl(rax, JVM_ACC_NATIVE); | |
1055 __ jcc(Assembler::notZero, L); | |
1056 __ stop("tried to execute non-native method as native"); | |
1057 __ bind(L); | |
1058 } | |
1059 { Label L; | |
1060 __ testl(rax, JVM_ACC_ABSTRACT); | |
1061 __ jcc(Assembler::zero, L); | |
1062 __ stop("tried to execute abstract method in interpreter"); | |
1063 __ bind(L); | |
1064 } | |
1065 #endif | |
1066 | |
1067 | |
1068 // increment invocation count & check for overflow | |
1069 Label invocation_counter_overflow; | |
1070 if (inc_counter) { | |
1071 generate_counter_incr(&invocation_counter_overflow, NULL, NULL); | |
1072 } | |
1073 | |
1074 Label continue_after_compile; | |
1075 | |
1076 __ bind(continue_after_compile); | |
1077 | |
1078 bang_stack_shadow_pages(true); | |
1079 | |
1080 // reset the _do_not_unlock_if_synchronized flag | |
304 | 1081 NOT_LP64(__ movl(rax, STATE(_thread));) // get thread |
0 | 1082 __ movbool(do_not_unlock_if_synchronized, false); |
1083 | |
1084 | |
1085 // check for synchronized native methods | |
1086 // | |
1087 // Note: This must happen *after* invocation counter check, since | |
1088 // when overflow happens, the method should not be locked. | |
1089 if (synchronized) { | |
1090 // potentially kills rax, rcx, rdx, rdi | |
1091 lock_method(); | |
1092 } else { | |
1093 // no synchronization necessary | |
1094 #ifdef ASSERT | |
1095 { Label L; | |
1096 __ movl(rax, access_flags); | |
1097 __ testl(rax, JVM_ACC_SYNCHRONIZED); | |
1098 __ jcc(Assembler::zero, L); | |
1099 __ stop("method needs synchronization"); | |
1100 __ bind(L); | |
1101 } | |
1102 #endif | |
1103 } | |
1104 | |
1105 // start execution | |
1106 | |
1107 // jvmti support | |
1108 __ notify_method_entry(); | |
1109 | |
1110 // work registers | |
1111 const Register method = rbx; | |
304 | 1112 const Register thread = LP64_ONLY(r15_thread) NOT_LP64(rdi); |
1113 const Register t = InterpreterRuntime::SignatureHandlerGenerator::temp(); // rcx|rscratch1 | |
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1114 const Address constMethod (method, Method::const_offset()); |
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1115 const Address size_of_parameters(t, ConstMethod::size_of_parameters_offset()); |
0 | 1116 |
1117 // allocate space for parameters | |
304 | 1118 __ movptr(method, STATE(_method)); |
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1119 __ verify_method_ptr(method); |
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1120 __ movptr(t, constMethod); |
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1121 __ load_unsigned_short(t, size_of_parameters); |
0 | 1122 __ shll(t, 2); |
304 | 1123 #ifdef _LP64 |
1124 __ subptr(rsp, t); | |
1125 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows | |
605 | 1126 __ andptr(rsp, -16); // must be 16 byte boundary (see amd64 ABI) |
304 | 1127 #else |
1128 __ addptr(t, 2*wordSize); // allocate two more slots for JNIEnv and possible mirror | |
1129 __ subptr(rsp, t); | |
1130 __ andptr(rsp, -(StackAlignmentInBytes)); // gcc needs 16 byte aligned stacks to do XMM intrinsics | |
1131 #endif // _LP64 | |
0 | 1132 |
1133 // get signature handler | |
1134 Label pending_exception_present; | |
1135 | |
1136 { Label L; | |
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1137 __ movptr(t, Address(method, Method::signature_handler_offset())); |
304 | 1138 __ testptr(t, t); |
0 | 1139 __ jcc(Assembler::notZero, L); |
1140 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::prepare_native_call), method, false); | |
304 | 1141 __ movptr(method, STATE(_method)); |
1142 __ cmpptr(Address(thread, Thread::pending_exception_offset()), (int32_t)NULL_WORD); | |
0 | 1143 __ jcc(Assembler::notEqual, pending_exception_present); |
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1144 __ verify_method_ptr(method); |
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1145 __ movptr(t, Address(method, Method::signature_handler_offset())); |
0 | 1146 __ bind(L); |
1147 } | |
1148 #ifdef ASSERT | |
1149 { | |
1150 Label L; | |
304 | 1151 __ push(t); |
0 | 1152 __ get_thread(t); // get vm's javathread* |
304 | 1153 __ cmpptr(t, STATE(_thread)); |
0 | 1154 __ jcc(Assembler::equal, L); |
1155 __ int3(); | |
1156 __ bind(L); | |
304 | 1157 __ pop(t); |
0 | 1158 } |
1159 #endif // | |
1160 | |
304 | 1161 const Register from_ptr = InterpreterRuntime::SignatureHandlerGenerator::from(); |
0 | 1162 // call signature handler |
1163 assert(InterpreterRuntime::SignatureHandlerGenerator::to () == rsp, "adjust this code"); | |
304 | 1164 |
0 | 1165 // The generated handlers do not touch RBX (the method oop). |
1166 // However, large signatures cannot be cached and are generated | |
1167 // each time here. The slow-path generator will blow RBX | |
1168 // sometime, so we must reload it after the call. | |
304 | 1169 __ movptr(from_ptr, STATE(_locals)); // get the from pointer |
0 | 1170 __ call(t); |
304 | 1171 __ movptr(method, STATE(_method)); |
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1172 __ verify_method_ptr(method); |
0 | 1173 |
1174 // result handler is in rax | |
1175 // set result handler | |
304 | 1176 __ movptr(STATE(_result_handler), rax); |
1177 | |
1178 | |
1179 // get native function entry point | |
1180 { Label L; | |
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1181 __ movptr(rax, Address(method, Method::native_function_offset())); |
304 | 1182 __ testptr(rax, rax); |
1183 __ jcc(Assembler::notZero, L); | |
1184 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::prepare_native_call), method); | |
1185 __ movptr(method, STATE(_method)); | |
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1186 __ verify_method_ptr(method); |
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1187 __ movptr(rax, Address(method, Method::native_function_offset())); |
304 | 1188 __ bind(L); |
1189 } | |
0 | 1190 |
1191 // pass mirror handle if static call | |
1192 { Label L; | |
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1193 const int mirror_offset = in_bytes(Klass::java_mirror_offset()); |
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1194 __ movl(t, Address(method, Method::access_flags_offset())); |
0 | 1195 __ testl(t, JVM_ACC_STATIC); |
1196 __ jcc(Assembler::zero, L); | |
1197 // get mirror | |
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1198 __ movptr(t, Address(method, Method:: const_offset())); |
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1199 __ movptr(t, Address(t, ConstMethod::constants_offset())); |
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1200 __ movptr(t, Address(t, ConstantPool::pool_holder_offset_in_bytes())); |
304 | 1201 __ movptr(t, Address(t, mirror_offset)); |
0 | 1202 // copy mirror into activation object |
304 | 1203 __ movptr(STATE(_oop_temp), t); |
0 | 1204 // pass handle to mirror |
304 | 1205 #ifdef _LP64 |
1206 __ lea(c_rarg1, STATE(_oop_temp)); | |
1207 #else | |
1208 __ lea(t, STATE(_oop_temp)); | |
1209 __ movptr(Address(rsp, wordSize), t); | |
1210 #endif // _LP64 | |
0 | 1211 __ bind(L); |
1212 } | |
1213 #ifdef ASSERT | |
1214 { | |
1215 Label L; | |
304 | 1216 __ push(t); |
0 | 1217 __ get_thread(t); // get vm's javathread* |
304 | 1218 __ cmpptr(t, STATE(_thread)); |
0 | 1219 __ jcc(Assembler::equal, L); |
1220 __ int3(); | |
1221 __ bind(L); | |
304 | 1222 __ pop(t); |
0 | 1223 } |
1224 #endif // | |
1225 | |
1226 // pass JNIEnv | |
304 | 1227 #ifdef _LP64 |
1228 __ lea(c_rarg0, Address(thread, JavaThread::jni_environment_offset())); | |
1229 #else | |
1230 __ movptr(thread, STATE(_thread)); // get thread | |
1231 __ lea(t, Address(thread, JavaThread::jni_environment_offset())); | |
1232 | |
1233 __ movptr(Address(rsp, 0), t); | |
1234 #endif // _LP64 | |
1235 | |
0 | 1236 #ifdef ASSERT |
1237 { | |
1238 Label L; | |
304 | 1239 __ push(t); |
0 | 1240 __ get_thread(t); // get vm's javathread* |
304 | 1241 __ cmpptr(t, STATE(_thread)); |
0 | 1242 __ jcc(Assembler::equal, L); |
1243 __ int3(); | |
1244 __ bind(L); | |
304 | 1245 __ pop(t); |
0 | 1246 } |
1247 #endif // | |
1248 | |
1249 #ifdef ASSERT | |
1250 { Label L; | |
1251 __ movl(t, Address(thread, JavaThread::thread_state_offset())); | |
1252 __ cmpl(t, _thread_in_Java); | |
1253 __ jcc(Assembler::equal, L); | |
1254 __ stop("Wrong thread state in native stub"); | |
1255 __ bind(L); | |
1256 } | |
1257 #endif | |
1258 | |
1259 // Change state to native (we save the return address in the thread, since it might not | |
1260 // be pushed on the stack when we do a a stack traversal). It is enough that the pc() | |
1261 // points into the right code segment. It does not have to be the correct return pc. | |
1262 | |
1263 __ set_last_Java_frame(thread, noreg, rbp, __ pc()); | |
1264 | |
1265 __ movl(Address(thread, JavaThread::thread_state_offset()), _thread_in_native); | |
1266 | |
1267 __ call(rax); | |
1268 | |
1269 // result potentially in rdx:rax or ST0 | |
304 | 1270 __ movptr(method, STATE(_method)); |
1271 NOT_LP64(__ movptr(thread, STATE(_thread));) // get thread | |
0 | 1272 |
1273 // The potential result is in ST(0) & rdx:rax | |
1274 // With C++ interpreter we leave any possible result in ST(0) until we are in result handler and then | |
1275 // we do the appropriate stuff for returning the result. rdx:rax must always be saved because just about | |
1276 // anything we do here will destroy it, st(0) is only saved if we re-enter the vm where it would | |
1277 // be destroyed. | |
1278 // It is safe to do these pushes because state is _thread_in_native and return address will be found | |
1279 // via _last_native_pc and not via _last_jave_sp | |
1280 | |
304 | 1281 // Must save the value of ST(0)/xmm0 since it could be destroyed before we get to result handler |
0 | 1282 { Label Lpush, Lskip; |
1283 ExternalAddress float_handler(AbstractInterpreter::result_handler(T_FLOAT)); | |
1284 ExternalAddress double_handler(AbstractInterpreter::result_handler(T_DOUBLE)); | |
1285 __ cmpptr(STATE(_result_handler), float_handler.addr()); | |
1286 __ jcc(Assembler::equal, Lpush); | |
1287 __ cmpptr(STATE(_result_handler), double_handler.addr()); | |
1288 __ jcc(Assembler::notEqual, Lskip); | |
1289 __ bind(Lpush); | |
304 | 1290 __ subptr(rsp, 2*wordSize); |
1291 if ( UseSSE < 2 ) { | |
1292 __ fstp_d(Address(rsp, 0)); | |
1293 } else { | |
1294 __ movdbl(Address(rsp, 0), xmm0); | |
1295 } | |
0 | 1296 __ bind(Lskip); |
1297 } | |
1298 | |
304 | 1299 // save rax:rdx for potential use by result handler. |
1300 __ push(rax); | |
1301 #ifndef _LP64 | |
1302 __ push(rdx); | |
1303 #endif // _LP64 | |
0 | 1304 |
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1305 // Verify or restore cpu control state after JNI call |
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1306 __ restore_cpu_control_state_after_jni(); |
0 | 1307 |
1308 // change thread state | |
1309 __ movl(Address(thread, JavaThread::thread_state_offset()), _thread_in_native_trans); | |
1310 if(os::is_MP()) { | |
1311 // Write serialization page so VM thread can do a pseudo remote membar. | |
1312 // We use the current thread pointer to calculate a thread specific | |
1313 // offset to write to within the page. This minimizes bus traffic | |
1314 // due to cache line collision. | |
1315 __ serialize_memory(thread, rcx); | |
1316 } | |
1317 | |
1318 // check for safepoint operation in progress and/or pending suspend requests | |
1319 { Label Continue; | |
1320 | |
1321 __ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()), | |
1322 SafepointSynchronize::_not_synchronized); | |
1323 | |
1324 // threads running native code and they are expected to self-suspend | |
1325 // when leaving the _thread_in_native state. We need to check for | |
1326 // pending suspend requests here. | |
1327 Label L; | |
1328 __ jcc(Assembler::notEqual, L); | |
1329 __ cmpl(Address(thread, JavaThread::suspend_flags_offset()), 0); | |
1330 __ jcc(Assembler::equal, Continue); | |
1331 __ bind(L); | |
1332 | |
1333 // Don't use call_VM as it will see a possible pending exception and forward it | |
1334 // and never return here preventing us from clearing _last_native_pc down below. | |
1335 // Also can't use call_VM_leaf either as it will check to see if rsi & rdi are | |
304 | 1336 // preserved and correspond to the bcp/locals pointers. |
0 | 1337 // |
304 | 1338 |
1339 ((MacroAssembler*)_masm)->call_VM_leaf(CAST_FROM_FN_PTR(address, JavaThread::check_special_condition_for_native_trans), | |
1340 thread); | |
0 | 1341 __ increment(rsp, wordSize); |
1342 | |
304 | 1343 __ movptr(method, STATE(_method)); |
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1344 __ verify_method_ptr(method); |
304 | 1345 __ movptr(thread, STATE(_thread)); // get thread |
0 | 1346 |
1347 __ bind(Continue); | |
1348 } | |
1349 | |
1350 // change thread state | |
1351 __ movl(Address(thread, JavaThread::thread_state_offset()), _thread_in_Java); | |
1352 | |
1353 __ reset_last_Java_frame(thread, true, true); | |
1354 | |
1355 // reset handle block | |
304 | 1356 __ movptr(t, Address(thread, JavaThread::active_handles_offset())); |
1357 __ movptr(Address(t, JNIHandleBlock::top_offset_in_bytes()), (int32_t)NULL_WORD); | |
0 | 1358 |
1359 // If result was an oop then unbox and save it in the frame | |
1360 { Label L; | |
1361 Label no_oop, store_result; | |
1362 ExternalAddress oop_handler(AbstractInterpreter::result_handler(T_OBJECT)); | |
1363 __ cmpptr(STATE(_result_handler), oop_handler.addr()); | |
1364 __ jcc(Assembler::notEqual, no_oop); | |
304 | 1365 #ifndef _LP64 |
1366 __ pop(rdx); | |
1367 #endif // _LP64 | |
1368 __ pop(rax); | |
1369 __ testptr(rax, rax); | |
0 | 1370 __ jcc(Assembler::zero, store_result); |
1371 // unbox | |
304 | 1372 __ movptr(rax, Address(rax, 0)); |
0 | 1373 __ bind(store_result); |
304 | 1374 __ movptr(STATE(_oop_temp), rax); |
0 | 1375 // keep stack depth as expected by pushing oop which will eventually be discarded |
304 | 1376 __ push(rax); |
1377 #ifndef _LP64 | |
1378 __ push(rdx); | |
1379 #endif // _LP64 | |
0 | 1380 __ bind(no_oop); |
1381 } | |
1382 | |
1383 { | |
1384 Label no_reguard; | |
1385 __ cmpl(Address(thread, JavaThread::stack_guard_state_offset()), JavaThread::stack_guard_yellow_disabled); | |
1386 __ jcc(Assembler::notEqual, no_reguard); | |
1387 | |
304 | 1388 __ pusha(); |
0 | 1389 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages))); |
304 | 1390 __ popa(); |
0 | 1391 |
1392 __ bind(no_reguard); | |
1393 } | |
1394 | |
1395 | |
1396 // QQQ Seems like for native methods we simply return and the caller will see the pending | |
1397 // exception and do the right thing. Certainly the interpreter will, don't know about | |
1398 // compiled methods. | |
1399 // Seems that the answer to above is no this is wrong. The old code would see the exception | |
1400 // and forward it before doing the unlocking and notifying jvmdi that method has exited. | |
1401 // This seems wrong need to investigate the spec. | |
1402 | |
1403 // handle exceptions (exception handling will handle unlocking!) | |
1404 { Label L; | |
304 | 1405 __ cmpptr(Address(thread, Thread::pending_exception_offset()), (int32_t)NULL_WORD); |
0 | 1406 __ jcc(Assembler::zero, L); |
1407 __ bind(pending_exception_present); | |
1408 | |
1409 // There are potential results on the stack (rax/rdx, ST(0)) we ignore these and simply | |
1410 // return and let caller deal with exception. This skips the unlocking here which | |
1411 // seems wrong but seems to be what asm interpreter did. Can't find this in the spec. | |
1412 // Note: must preverve method in rbx | |
1413 // | |
1414 | |
1415 // remove activation | |
1416 | |
304 | 1417 __ movptr(t, STATE(_sender_sp)); |
0 | 1418 __ leave(); // remove frame anchor |
304 | 1419 __ pop(rdi); // get return address |
1420 __ movptr(state, STATE(_prev_link)); // get previous state for return | |
1421 __ mov(rsp, t); // set sp to sender sp | |
1422 __ push(rdi); // push throwing pc | |
0 | 1423 // The skips unlocking!! This seems to be what asm interpreter does but seems |
1424 // very wrong. Not clear if this violates the spec. | |
1425 __ jump(RuntimeAddress(StubRoutines::forward_exception_entry())); | |
1426 __ bind(L); | |
1427 } | |
1428 | |
1429 // do unlocking if necessary | |
1430 { Label L; | |
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1431 __ movl(t, Address(method, Method::access_flags_offset())); |
0 | 1432 __ testl(t, JVM_ACC_SYNCHRONIZED); |
1433 __ jcc(Assembler::zero, L); | |
1434 // the code below should be shared with interpreter macro assembler implementation | |
1435 { Label unlock; | |
304 | 1436 const Register monitor = NOT_LP64(rdx) LP64_ONLY(c_rarg1); |
0 | 1437 // BasicObjectLock will be first in list, since this is a synchronized method. However, need |
1438 // to check that the object has not been unlocked by an explicit monitorexit bytecode. | |
304 | 1439 __ movptr(monitor, STATE(_monitor_base)); |
1440 __ subptr(monitor, frame::interpreter_frame_monitor_size() * wordSize); // address of initial monitor | |
1441 | |
1442 __ movptr(t, Address(monitor, BasicObjectLock::obj_offset_in_bytes())); | |
1443 __ testptr(t, t); | |
0 | 1444 __ jcc(Assembler::notZero, unlock); |
1445 | |
1446 // Entry already unlocked, need to throw exception | |
1447 __ MacroAssembler::call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_illegal_monitor_state_exception)); | |
1448 __ should_not_reach_here(); | |
1449 | |
1450 __ bind(unlock); | |
304 | 1451 __ unlock_object(monitor); |
0 | 1452 // unlock can blow rbx so restore it for path that needs it below |
304 | 1453 __ movptr(method, STATE(_method)); |
0 | 1454 } |
1455 __ bind(L); | |
1456 } | |
1457 | |
1458 // jvmti support | |
1459 // Note: This must happen _after_ handling/throwing any exceptions since | |
1460 // the exception handler code notifies the runtime of method exits | |
1461 // too. If this happens before, method entry/exit notifications are | |
1462 // not properly paired (was bug - gri 11/22/99). | |
1463 __ notify_method_exit(vtos, InterpreterMacroAssembler::NotifyJVMTI); | |
1464 | |
1465 // restore potential result in rdx:rax, call result handler to restore potential result in ST0 & handle result | |
304 | 1466 #ifndef _LP64 |
1467 __ pop(rdx); | |
1468 #endif // _LP64 | |
1469 __ pop(rax); | |
1470 __ movptr(t, STATE(_result_handler)); // get result handler | |
0 | 1471 __ call(t); // call result handler to convert to tosca form |
1472 | |
1473 // remove activation | |
1474 | |
304 | 1475 __ movptr(t, STATE(_sender_sp)); |
0 | 1476 |
1477 __ leave(); // remove frame anchor | |
304 | 1478 __ pop(rdi); // get return address |
1479 __ movptr(state, STATE(_prev_link)); // get previous state for return (if c++ interpreter was caller) | |
1480 __ mov(rsp, t); // set sp to sender sp | |
0 | 1481 __ jmp(rdi); |
1482 | |
1483 // invocation counter overflow | |
1484 if (inc_counter) { | |
1485 // Handle overflow of counter and compile method | |
1486 __ bind(invocation_counter_overflow); | |
1487 generate_counter_overflow(&continue_after_compile); | |
1488 } | |
1489 | |
1490 return entry_point; | |
1491 } | |
1492 | |
1493 // Generate entries that will put a result type index into rcx | |
1494 void CppInterpreterGenerator::generate_deopt_handling() { | |
1495 | |
1496 Label return_from_deopt_common; | |
1497 | |
1498 // Generate entries that will put a result type index into rcx | |
1499 // deopt needs to jump to here to enter the interpreter (return a result) | |
1500 deopt_frame_manager_return_atos = __ pc(); | |
1501 | |
1502 // rax is live here | |
1503 __ movl(rcx, AbstractInterpreter::BasicType_as_index(T_OBJECT)); // Result stub address array index | |
1504 __ jmp(return_from_deopt_common); | |
1505 | |
1506 | |
1507 // deopt needs to jump to here to enter the interpreter (return a result) | |
1508 deopt_frame_manager_return_btos = __ pc(); | |
1509 | |
1510 // rax is live here | |
1511 __ movl(rcx, AbstractInterpreter::BasicType_as_index(T_BOOLEAN)); // Result stub address array index | |
1512 __ jmp(return_from_deopt_common); | |
1513 | |
1514 // deopt needs to jump to here to enter the interpreter (return a result) | |
1515 deopt_frame_manager_return_itos = __ pc(); | |
1516 | |
1517 // rax is live here | |
1518 __ movl(rcx, AbstractInterpreter::BasicType_as_index(T_INT)); // Result stub address array index | |
1519 __ jmp(return_from_deopt_common); | |
1520 | |
1521 // deopt needs to jump to here to enter the interpreter (return a result) | |
1522 | |
1523 deopt_frame_manager_return_ltos = __ pc(); | |
1524 // rax,rdx are live here | |
1525 __ movl(rcx, AbstractInterpreter::BasicType_as_index(T_LONG)); // Result stub address array index | |
1526 __ jmp(return_from_deopt_common); | |
1527 | |
1528 // deopt needs to jump to here to enter the interpreter (return a result) | |
1529 | |
1530 deopt_frame_manager_return_ftos = __ pc(); | |
1531 // st(0) is live here | |
1532 __ movl(rcx, AbstractInterpreter::BasicType_as_index(T_FLOAT)); // Result stub address array index | |
1533 __ jmp(return_from_deopt_common); | |
1534 | |
1535 // deopt needs to jump to here to enter the interpreter (return a result) | |
1536 deopt_frame_manager_return_dtos = __ pc(); | |
1537 | |
1538 // st(0) is live here | |
1539 __ movl(rcx, AbstractInterpreter::BasicType_as_index(T_DOUBLE)); // Result stub address array index | |
1540 __ jmp(return_from_deopt_common); | |
1541 | |
1542 // deopt needs to jump to here to enter the interpreter (return a result) | |
1543 deopt_frame_manager_return_vtos = __ pc(); | |
1544 | |
1545 __ movl(rcx, AbstractInterpreter::BasicType_as_index(T_VOID)); | |
1546 | |
1547 // Deopt return common | |
1548 // an index is present in rcx that lets us move any possible result being | |
1549 // return to the interpreter's stack | |
1550 // | |
1551 // Because we have a full sized interpreter frame on the youngest | |
1552 // activation the stack is pushed too deep to share the tosca to | |
1553 // stack converters directly. We shrink the stack to the desired | |
1554 // amount and then push result and then re-extend the stack. | |
1555 // We could have the code in size_activation layout a short | |
1556 // frame for the top activation but that would look different | |
1557 // than say sparc (which needs a full size activation because | |
1558 // the windows are in the way. Really it could be short? QQQ | |
1559 // | |
1560 __ bind(return_from_deopt_common); | |
1561 | |
304 | 1562 __ lea(state, Address(rbp, -(int)sizeof(BytecodeInterpreter))); |
0 | 1563 |
1564 // setup rsp so we can push the "result" as needed. | |
304 | 1565 __ movptr(rsp, STATE(_stack)); // trim stack (is prepushed) |
1566 __ addptr(rsp, wordSize); // undo prepush | |
0 | 1567 |
1568 ExternalAddress tosca_to_stack((address)CppInterpreter::_tosca_to_stack); | |
304 | 1569 // Address index(noreg, rcx, Address::times_ptr); |
1570 __ movptr(rcx, ArrayAddress(tosca_to_stack, Address(noreg, rcx, Address::times_ptr))); | |
1571 // __ movl(rcx, Address(noreg, rcx, Address::times_ptr, int(AbstractInterpreter::_tosca_to_stack))); | |
0 | 1572 __ call(rcx); // call result converter |
1573 | |
1574 __ movl(STATE(_msg), (int)BytecodeInterpreter::deopt_resume); | |
304 | 1575 __ lea(rsp, Address(rsp, -wordSize)); // prepush stack (result if any already present) |
1576 __ movptr(STATE(_stack), rsp); // inform interpreter of new stack depth (parameters removed, | |
0 | 1577 // result if any on stack already ) |
304 | 1578 __ movptr(rsp, STATE(_stack_limit)); // restore expression stack to full depth |
0 | 1579 } |
1580 | |
1581 // Generate the code to handle a more_monitors message from the c++ interpreter | |
1582 void CppInterpreterGenerator::generate_more_monitors() { | |
1583 | |
1584 | |
1585 Label entry, loop; | |
1586 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize; | |
304 | 1587 // 1. compute new pointers // rsp: old expression stack top |
1588 __ movptr(rdx, STATE(_stack_base)); // rdx: old expression stack bottom | |
1589 __ subptr(rsp, entry_size); // move expression stack top limit | |
1590 __ subptr(STATE(_stack), entry_size); // update interpreter stack top | |
1591 __ subptr(STATE(_stack_limit), entry_size); // inform interpreter | |
1592 __ subptr(rdx, entry_size); // move expression stack bottom | |
1593 __ movptr(STATE(_stack_base), rdx); // inform interpreter | |
1594 __ movptr(rcx, STATE(_stack)); // set start value for copy loop | |
0 | 1595 __ jmp(entry); |
1596 // 2. move expression stack contents | |
1597 __ bind(loop); | |
304 | 1598 __ movptr(rbx, Address(rcx, entry_size)); // load expression stack word from old location |
1599 __ movptr(Address(rcx, 0), rbx); // and store it at new location | |
1600 __ addptr(rcx, wordSize); // advance to next word | |
0 | 1601 __ bind(entry); |
304 | 1602 __ cmpptr(rcx, rdx); // check if bottom reached |
1603 __ jcc(Assembler::notEqual, loop); // if not at bottom then copy next word | |
0 | 1604 // now zero the slot so we can find it. |
304 | 1605 __ movptr(Address(rdx, BasicObjectLock::obj_offset_in_bytes()), (int32_t) NULL_WORD); |
0 | 1606 __ movl(STATE(_msg), (int)BytecodeInterpreter::got_monitors); |
1607 } | |
1608 | |
1609 | |
1610 // Initial entry to C++ interpreter from the call_stub. | |
1611 // This entry point is called the frame manager since it handles the generation | |
1612 // of interpreter activation frames via requests directly from the vm (via call_stub) | |
1613 // and via requests from the interpreter. The requests from the call_stub happen | |
1614 // directly thru the entry point. Requests from the interpreter happen via returning | |
1615 // from the interpreter and examining the message the interpreter has returned to | |
1616 // the frame manager. The frame manager can take the following requests: | |
1617 | |
1618 // NO_REQUEST - error, should never happen. | |
1619 // MORE_MONITORS - need a new monitor. Shuffle the expression stack on down and | |
1620 // allocate a new monitor. | |
1621 // CALL_METHOD - setup a new activation to call a new method. Very similar to what | |
1622 // happens during entry during the entry via the call stub. | |
1623 // RETURN_FROM_METHOD - remove an activation. Return to interpreter or call stub. | |
1624 // | |
1625 // Arguments: | |
1626 // | |
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1627 // rbx: Method* |
0 | 1628 // rcx: receiver - unused (retrieved from stack as needed) |
304 | 1629 // rsi/r13: previous frame manager state (NULL from the call_stub/c1/c2) |
0 | 1630 // |
1631 // | |
1632 // Stack layout at entry | |
1633 // | |
1634 // [ return address ] <--- rsp | |
1635 // [ parameter n ] | |
1636 // ... | |
1637 // [ parameter 1 ] | |
1638 // [ expression stack ] | |
1639 // | |
1640 // | |
1641 // We are free to blow any registers we like because the call_stub which brought us here | |
1642 // initially has preserved the callee save registers already. | |
1643 // | |
1644 // | |
1645 | |
1646 static address interpreter_frame_manager = NULL; | |
1647 | |
1648 address InterpreterGenerator::generate_normal_entry(bool synchronized) { | |
1649 | |
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1650 // rbx: Method* |
304 | 1651 // rsi/r13: sender sp |
0 | 1652 |
1653 // Because we redispatch "recursive" interpreter entries thru this same entry point | |
1654 // the "input" register usage is a little strange and not what you expect coming | |
1655 // from the call_stub. From the call stub rsi/rdi (current/previous) interpreter | |
1656 // state are NULL but on "recursive" dispatches they are what you'd expect. | |
1657 // rsi: current interpreter state (C++ interpreter) must preserve (null from call_stub/c1/c2) | |
1658 | |
1659 | |
1660 // A single frame manager is plenty as we don't specialize for synchronized. We could and | |
1661 // the code is pretty much ready. Would need to change the test below and for good measure | |
1662 // modify generate_interpreter_state to only do the (pre) sync stuff stuff for synchronized | |
1663 // routines. Not clear this is worth it yet. | |
1664 | |
1665 if (interpreter_frame_manager) return interpreter_frame_manager; | |
1666 | |
1667 address entry_point = __ pc(); | |
1668 | |
1669 // Fast accessor methods share this entry point. | |
1670 // This works because frame manager is in the same codelet | |
1671 if (UseFastAccessorMethods && !synchronized) __ bind(fast_accessor_slow_entry_path); | |
1672 | |
1673 Label dispatch_entry_2; | |
304 | 1674 __ movptr(rcx, sender_sp_on_entry); |
1675 __ movptr(state, (int32_t)NULL_WORD); // no current activation | |
0 | 1676 |
1677 __ jmp(dispatch_entry_2); | |
1678 | |
1679 const Register locals = rdi; | |
1680 | |
1681 Label re_dispatch; | |
1682 | |
1683 __ bind(re_dispatch); | |
1684 | |
1685 // save sender sp (doesn't include return address | |
304 | 1686 __ lea(rcx, Address(rsp, wordSize)); |
0 | 1687 |
1688 __ bind(dispatch_entry_2); | |
1689 | |
1690 // save sender sp | |
304 | 1691 __ push(rcx); |
0 | 1692 |
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1693 const Address constMethod (rbx, Method::const_offset()); |
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1694 const Address access_flags (rbx, Method::access_flags_offset()); |
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1695 const Address size_of_parameters(rdx, ConstMethod::size_of_parameters_offset()); |
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1696 const Address size_of_locals (rdx, ConstMethod::size_of_locals_offset()); |
0 | 1697 |
1698 // const Address monitor_block_top (rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize); | |
1699 // const Address monitor_block_bot (rbp, frame::interpreter_frame_initial_sp_offset * wordSize); | |
1700 // const Address monitor(rbp, frame::interpreter_frame_initial_sp_offset * wordSize - (int)sizeof(BasicObjectLock)); | |
1701 | |
1702 // get parameter size (always needed) | |
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1703 __ movptr(rdx, constMethod); |
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1704 __ load_unsigned_short(rcx, size_of_parameters); |
0 | 1705 |
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1706 // rbx: Method* |
0 | 1707 // rcx: size of parameters |
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1708 __ load_unsigned_short(rdx, size_of_locals); // get size of locals in words |
0 | 1709 |
304 | 1710 __ subptr(rdx, rcx); // rdx = no. of additional locals |
0 | 1711 |
1712 // see if we've got enough room on the stack for locals plus overhead. | |
1713 generate_stack_overflow_check(); // C++ | |
1714 | |
1715 // c++ interpreter does not use stack banging or any implicit exceptions | |
1716 // leave for now to verify that check is proper. | |
1717 bang_stack_shadow_pages(false); | |
1718 | |
1719 | |
1720 | |
1721 // compute beginning of parameters (rdi) | |
304 | 1722 __ lea(locals, Address(rsp, rcx, Address::times_ptr, wordSize)); |
0 | 1723 |
1724 // save sender's sp | |
1725 // __ movl(rcx, rsp); | |
1726 | |
1727 // get sender's sp | |
304 | 1728 __ pop(rcx); |
0 | 1729 |
1730 // get return address | |
304 | 1731 __ pop(rax); |
0 | 1732 |
1733 // rdx - # of additional locals | |
1734 // allocate space for locals | |
1735 // explicitly initialize locals | |
1736 { | |
1737 Label exit, loop; | |
304 | 1738 __ testl(rdx, rdx); // (32bit ok) |
0 | 1739 __ jcc(Assembler::lessEqual, exit); // do nothing if rdx <= 0 |
1740 __ bind(loop); | |
304 | 1741 __ push((int32_t)NULL_WORD); // initialize local variables |
0 | 1742 __ decrement(rdx); // until everything initialized |
1743 __ jcc(Assembler::greater, loop); | |
1744 __ bind(exit); | |
1745 } | |
1746 | |
1747 | |
1748 // Assumes rax = return address | |
1749 | |
1750 // allocate and initialize new interpreterState and method expression stack | |
1751 // IN(locals) -> locals | |
1752 // IN(state) -> any current interpreter activation | |
1753 // destroys rax, rcx, rdx, rdi | |
1754 // OUT (state) -> new interpreterState | |
1755 // OUT(rsp) -> bottom of methods expression stack | |
1756 | |
1757 generate_compute_interpreter_state(state, locals, rcx, false); | |
1758 | |
1759 // Call interpreter | |
1760 | |
1761 Label call_interpreter; | |
1762 __ bind(call_interpreter); | |
1763 | |
1764 // c++ interpreter does not use stack banging or any implicit exceptions | |
1765 // leave for now to verify that check is proper. | |
1766 bang_stack_shadow_pages(false); | |
1767 | |
1768 | |
1769 // Call interpreter enter here if message is | |
1770 // set and we know stack size is valid | |
1771 | |
1772 Label call_interpreter_2; | |
1773 | |
1774 __ bind(call_interpreter_2); | |
1775 | |
1776 { | |
304 | 1777 const Register thread = NOT_LP64(rcx) LP64_ONLY(r15_thread); |
1778 | |
1779 #ifdef _LP64 | |
1780 __ mov(c_rarg0, state); | |
1781 #else | |
1782 __ push(state); // push arg to interpreter | |
1783 __ movptr(thread, STATE(_thread)); | |
1784 #endif // _LP64 | |
0 | 1785 |
1786 // We can setup the frame anchor with everything we want at this point | |
1787 // as we are thread_in_Java and no safepoints can occur until we go to | |
1788 // vm mode. We do have to clear flags on return from vm but that is it | |
1789 // | |
304 | 1790 __ movptr(Address(thread, JavaThread::last_Java_fp_offset()), rbp); |
1791 __ movptr(Address(thread, JavaThread::last_Java_sp_offset()), rsp); | |
0 | 1792 |
1793 // Call the interpreter | |
1794 | |
1795 RuntimeAddress normal(CAST_FROM_FN_PTR(address, BytecodeInterpreter::run)); | |
1796 RuntimeAddress checking(CAST_FROM_FN_PTR(address, BytecodeInterpreter::runWithChecks)); | |
1797 | |
1798 __ call(JvmtiExport::can_post_interpreter_events() ? checking : normal); | |
304 | 1799 NOT_LP64(__ pop(rax);) // discard parameter to run |
0 | 1800 // |
1801 // state is preserved since it is callee saved | |
1802 // | |
1803 | |
1804 // reset_last_Java_frame | |
1805 | |
304 | 1806 NOT_LP64(__ movl(thread, STATE(_thread));) |
0 | 1807 __ reset_last_Java_frame(thread, true, true); |
1808 } | |
1809 | |
1810 // examine msg from interpreter to determine next action | |
1811 | |
1812 __ movl(rdx, STATE(_msg)); // Get new message | |
1813 | |
1814 Label call_method; | |
1815 Label return_from_interpreted_method; | |
1816 Label throw_exception; | |
1817 Label bad_msg; | |
1818 Label do_OSR; | |
1819 | |
304 | 1820 __ cmpl(rdx, (int32_t)BytecodeInterpreter::call_method); |
0 | 1821 __ jcc(Assembler::equal, call_method); |
304 | 1822 __ cmpl(rdx, (int32_t)BytecodeInterpreter::return_from_method); |
0 | 1823 __ jcc(Assembler::equal, return_from_interpreted_method); |
304 | 1824 __ cmpl(rdx, (int32_t)BytecodeInterpreter::do_osr); |
0 | 1825 __ jcc(Assembler::equal, do_OSR); |
304 | 1826 __ cmpl(rdx, (int32_t)BytecodeInterpreter::throwing_exception); |
0 | 1827 __ jcc(Assembler::equal, throw_exception); |
304 | 1828 __ cmpl(rdx, (int32_t)BytecodeInterpreter::more_monitors); |
0 | 1829 __ jcc(Assembler::notEqual, bad_msg); |
1830 | |
1831 // Allocate more monitor space, shuffle expression stack.... | |
1832 | |
1833 generate_more_monitors(); | |
1834 | |
1835 __ jmp(call_interpreter); | |
1836 | |
1837 // uncommon trap needs to jump to here to enter the interpreter (re-execute current bytecode) | |
1838 unctrap_frame_manager_entry = __ pc(); | |
1839 // | |
1840 // Load the registers we need. | |
304 | 1841 __ lea(state, Address(rbp, -(int)sizeof(BytecodeInterpreter))); |
1842 __ movptr(rsp, STATE(_stack_limit)); // restore expression stack to full depth | |
0 | 1843 __ jmp(call_interpreter_2); |
1844 | |
1845 | |
1846 | |
1847 //============================================================================= | |
1848 // Returning from a compiled method into a deopted method. The bytecode at the | |
1849 // bcp has completed. The result of the bytecode is in the native abi (the tosca | |
1850 // for the template based interpreter). Any stack space that was used by the | |
1851 // bytecode that has completed has been removed (e.g. parameters for an invoke) | |
1852 // so all that we have to do is place any pending result on the expression stack | |
1853 // and resume execution on the next bytecode. | |
1854 | |
1855 | |
1856 generate_deopt_handling(); | |
1857 __ jmp(call_interpreter); | |
1858 | |
1859 | |
1860 // Current frame has caught an exception we need to dispatch to the | |
1861 // handler. We can get here because a native interpreter frame caught | |
1862 // an exception in which case there is no handler and we must rethrow | |
1863 // If it is a vanilla interpreted frame the we simply drop into the | |
1864 // interpreter and let it do the lookup. | |
1865 | |
1866 Interpreter::_rethrow_exception_entry = __ pc(); | |
1867 // rax: exception | |
1868 // rdx: return address/pc that threw exception | |
1869 | |
1870 Label return_with_exception; | |
1871 Label unwind_and_forward; | |
1872 | |
1873 // restore state pointer. | |
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1874 __ lea(state, Address(rbp, -(int)sizeof(BytecodeInterpreter))); |
304 | 1875 |
1876 __ movptr(rbx, STATE(_method)); // get method | |
1877 #ifdef _LP64 | |
1878 __ movptr(Address(r15_thread, Thread::pending_exception_offset()), rax); | |
1879 #else | |
0 | 1880 __ movl(rcx, STATE(_thread)); // get thread |
1881 | |
1882 // Store exception with interpreter will expect it | |
304 | 1883 __ movptr(Address(rcx, Thread::pending_exception_offset()), rax); |
1884 #endif // _LP64 | |
0 | 1885 |
1886 // is current frame vanilla or native? | |
1887 | |
1888 __ movl(rdx, access_flags); | |
1889 __ testl(rdx, JVM_ACC_NATIVE); | |
1890 __ jcc(Assembler::zero, return_with_exception); // vanilla interpreted frame, handle directly | |
1891 | |
1892 // We drop thru to unwind a native interpreted frame with a pending exception | |
1893 // We jump here for the initial interpreter frame with exception pending | |
1894 // We unwind the current acivation and forward it to our caller. | |
1895 | |
1896 __ bind(unwind_and_forward); | |
1897 | |
1898 // unwind rbp, return stack to unextended value and re-push return address | |
1899 | |
304 | 1900 __ movptr(rcx, STATE(_sender_sp)); |
0 | 1901 __ leave(); |
304 | 1902 __ pop(rdx); |
1903 __ mov(rsp, rcx); | |
1904 __ push(rdx); | |
0 | 1905 __ jump(RuntimeAddress(StubRoutines::forward_exception_entry())); |
1906 | |
1907 // Return point from a call which returns a result in the native abi | |
1908 // (c1/c2/jni-native). This result must be processed onto the java | |
1909 // expression stack. | |
1910 // | |
1911 // A pending exception may be present in which case there is no result present | |
1912 | |
1913 Label resume_interpreter; | |
1914 Label do_float; | |
1915 Label do_double; | |
1916 Label done_conv; | |
1917 | |
1918 // The FPU stack is clean if UseSSE >= 2 but must be cleaned in other cases | |
1919 if (UseSSE < 2) { | |
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1920 __ lea(state, Address(rbp, -(int)sizeof(BytecodeInterpreter))); |
304 | 1921 __ movptr(rbx, STATE(_result._to_call._callee)); // get method just executed |
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1922 __ movl(rcx, Address(rbx, Method::result_index_offset())); |
0 | 1923 __ cmpl(rcx, AbstractInterpreter::BasicType_as_index(T_FLOAT)); // Result stub address array index |
1924 __ jcc(Assembler::equal, do_float); | |
1925 __ cmpl(rcx, AbstractInterpreter::BasicType_as_index(T_DOUBLE)); // Result stub address array index | |
1926 __ jcc(Assembler::equal, do_double); | |
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1927 #if !defined(_LP64) || defined(COMPILER1) || !defined(COMPILER2) |
0 | 1928 __ empty_FPU_stack(); |
1929 #endif // COMPILER2 | |
1930 __ jmp(done_conv); | |
1931 | |
1932 __ bind(do_float); | |
1933 #ifdef COMPILER2 | |
1934 for (int i = 1; i < 8; i++) { | |
1935 __ ffree(i); | |
1936 } | |
1937 #endif // COMPILER2 | |
1938 __ jmp(done_conv); | |
1939 __ bind(do_double); | |
1940 #ifdef COMPILER2 | |
1941 for (int i = 1; i < 8; i++) { | |
1942 __ ffree(i); | |
1943 } | |
1944 #endif // COMPILER2 | |
1945 __ jmp(done_conv); | |
1946 } else { | |
1947 __ MacroAssembler::verify_FPU(0, "generate_return_entry_for compiled"); | |
1948 __ jmp(done_conv); | |
1949 } | |
1950 | |
1951 // Return point to interpreter from compiled/native method | |
1952 InternalAddress return_from_native_method(__ pc()); | |
1953 | |
1954 __ bind(done_conv); | |
1955 | |
1956 | |
1957 // Result if any is in tosca. The java expression stack is in the state that the | |
1958 // calling convention left it (i.e. params may or may not be present) | |
1959 // Copy the result from tosca and place it on java expression stack. | |
1960 | |
304 | 1961 // Restore rsi/r13 as compiled code may not preserve it |
1962 | |
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1963 __ lea(state, Address(rbp, -(int)sizeof(BytecodeInterpreter))); |
0 | 1964 |
1965 // restore stack to what we had when we left (in case i2c extended it) | |
1966 | |
304 | 1967 __ movptr(rsp, STATE(_stack)); |
1968 __ lea(rsp, Address(rsp, wordSize)); | |
0 | 1969 |
1970 // If there is a pending exception then we don't really have a result to process | |
1971 | |
304 | 1972 #ifdef _LP64 |
1973 __ cmpptr(Address(r15_thread, Thread::pending_exception_offset()), (int32_t)NULL_WORD); | |
1974 #else | |
1975 __ movptr(rcx, STATE(_thread)); // get thread | |
1976 __ cmpptr(Address(rcx, Thread::pending_exception_offset()), (int32_t)NULL_WORD); | |
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1977 #endif // _LP64 |
0 | 1978 __ jcc(Assembler::notZero, return_with_exception); |
1979 | |
1980 // get method just executed | |
304 | 1981 __ movptr(rbx, STATE(_result._to_call._callee)); |
0 | 1982 |
1983 // callee left args on top of expression stack, remove them | |
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1984 __ movptr(rcx, constMethod); |
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1985 __ load_unsigned_short(rcx, Address(rcx, ConstMethod::size_of_parameters_offset())); |
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1986 |
304 | 1987 __ lea(rsp, Address(rsp, rcx, Address::times_ptr)); |
0 | 1988 |
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1989 __ movl(rcx, Address(rbx, Method::result_index_offset())); |
0 | 1990 ExternalAddress tosca_to_stack((address)CppInterpreter::_tosca_to_stack); |
304 | 1991 // Address index(noreg, rax, Address::times_ptr); |
1992 __ movptr(rcx, ArrayAddress(tosca_to_stack, Address(noreg, rcx, Address::times_ptr))); | |
1993 // __ movl(rcx, Address(noreg, rcx, Address::times_ptr, int(AbstractInterpreter::_tosca_to_stack))); | |
0 | 1994 __ call(rcx); // call result converter |
1995 __ jmp(resume_interpreter); | |
1996 | |
1997 // An exception is being caught on return to a vanilla interpreter frame. | |
1998 // Empty the stack and resume interpreter | |
1999 | |
2000 __ bind(return_with_exception); | |
2001 | |
2002 // Exception present, empty stack | |
304 | 2003 __ movptr(rsp, STATE(_stack_base)); |
0 | 2004 __ jmp(resume_interpreter); |
2005 | |
2006 // Return from interpreted method we return result appropriate to the caller (i.e. "recursive" | |
2007 // interpreter call, or native) and unwind this interpreter activation. | |
2008 // All monitors should be unlocked. | |
2009 | |
2010 __ bind(return_from_interpreted_method); | |
2011 | |
2012 Label return_to_initial_caller; | |
2013 | |
304 | 2014 __ movptr(rbx, STATE(_method)); // get method just executed |
2015 __ cmpptr(STATE(_prev_link), (int32_t)NULL_WORD); // returning from "recursive" interpreter call? | |
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2016 __ movl(rax, Address(rbx, Method::result_index_offset())); // get result type index |
0 | 2017 __ jcc(Assembler::equal, return_to_initial_caller); // back to native code (call_stub/c1/c2) |
2018 | |
2019 // Copy result to callers java stack | |
2020 ExternalAddress stack_to_stack((address)CppInterpreter::_stack_to_stack); | |
304 | 2021 // Address index(noreg, rax, Address::times_ptr); |
2022 | |
2023 __ movptr(rax, ArrayAddress(stack_to_stack, Address(noreg, rax, Address::times_ptr))); | |
2024 // __ movl(rax, Address(noreg, rax, Address::times_ptr, int(AbstractInterpreter::_stack_to_stack))); | |
0 | 2025 __ call(rax); // call result converter |
2026 | |
2027 Label unwind_recursive_activation; | |
2028 __ bind(unwind_recursive_activation); | |
2029 | |
2030 // returning to interpreter method from "recursive" interpreter call | |
2031 // result converter left rax pointing to top of the java stack for method we are returning | |
2032 // to. Now all we must do is unwind the state from the completed call | |
2033 | |
304 | 2034 __ movptr(state, STATE(_prev_link)); // unwind state |
0 | 2035 __ leave(); // pop the frame |
304 | 2036 __ mov(rsp, rax); // unwind stack to remove args |
0 | 2037 |
2038 // Resume the interpreter. The current frame contains the current interpreter | |
2039 // state object. | |
2040 // | |
2041 | |
2042 __ bind(resume_interpreter); | |
2043 | |
2044 // state == interpreterState object for method we are resuming | |
2045 | |
2046 __ movl(STATE(_msg), (int)BytecodeInterpreter::method_resume); | |
304 | 2047 __ lea(rsp, Address(rsp, -wordSize)); // prepush stack (result if any already present) |
2048 __ movptr(STATE(_stack), rsp); // inform interpreter of new stack depth (parameters removed, | |
0 | 2049 // result if any on stack already ) |
304 | 2050 __ movptr(rsp, STATE(_stack_limit)); // restore expression stack to full depth |
0 | 2051 __ jmp(call_interpreter_2); // No need to bang |
2052 | |
2053 // interpreter returning to native code (call_stub/c1/c2) | |
2054 // convert result and unwind initial activation | |
2055 // rax - result index | |
2056 | |
2057 __ bind(return_to_initial_caller); | |
2058 ExternalAddress stack_to_native((address)CppInterpreter::_stack_to_native_abi); | |
304 | 2059 // Address index(noreg, rax, Address::times_ptr); |
2060 | |
2061 __ movptr(rax, ArrayAddress(stack_to_native, Address(noreg, rax, Address::times_ptr))); | |
0 | 2062 __ call(rax); // call result converter |
2063 | |
2064 Label unwind_initial_activation; | |
2065 __ bind(unwind_initial_activation); | |
2066 | |
2067 // RETURN TO CALL_STUB/C1/C2 code (result if any in rax/rdx ST(0)) | |
2068 | |
2069 /* Current stack picture | |
2070 | |
2071 [ incoming parameters ] | |
2072 [ extra locals ] | |
2073 [ return address to CALL_STUB/C1/C2] | |
2074 fp -> [ CALL_STUB/C1/C2 fp ] | |
2075 BytecodeInterpreter object | |
2076 expression stack | |
2077 sp -> | |
2078 | |
2079 */ | |
2080 | |
2081 // return restoring the stack to the original sender_sp value | |
2082 | |
304 | 2083 __ movptr(rcx, STATE(_sender_sp)); |
0 | 2084 __ leave(); |
304 | 2085 __ pop(rdi); // get return address |
0 | 2086 // set stack to sender's sp |
304 | 2087 __ mov(rsp, rcx); |
0 | 2088 __ jmp(rdi); // return to call_stub |
2089 | |
2090 // OSR request, adjust return address to make current frame into adapter frame | |
2091 // and enter OSR nmethod | |
2092 | |
2093 __ bind(do_OSR); | |
2094 | |
2095 Label remove_initial_frame; | |
2096 | |
2097 // We are going to pop this frame. Is there another interpreter frame underneath | |
2098 // it or is it callstub/compiled? | |
2099 | |
2100 // Move buffer to the expected parameter location | |
304 | 2101 __ movptr(rcx, STATE(_result._osr._osr_buf)); |
2102 | |
2103 __ movptr(rax, STATE(_result._osr._osr_entry)); | |
2104 | |
2105 __ cmpptr(STATE(_prev_link), (int32_t)NULL_WORD); // returning from "recursive" interpreter call? | |
0 | 2106 __ jcc(Assembler::equal, remove_initial_frame); // back to native code (call_stub/c1/c2) |
2107 | |
304 | 2108 __ movptr(sender_sp_on_entry, STATE(_sender_sp)); // get sender's sp in expected register |
0 | 2109 __ leave(); // pop the frame |
304 | 2110 __ mov(rsp, sender_sp_on_entry); // trim any stack expansion |
0 | 2111 |
2112 | |
2113 // We know we are calling compiled so push specialized return | |
2114 // method uses specialized entry, push a return so we look like call stub setup | |
2115 // this path will handle fact that result is returned in registers and not | |
2116 // on the java stack. | |
2117 | |
2118 __ pushptr(return_from_native_method.addr()); | |
2119 | |
2120 __ jmp(rax); | |
2121 | |
2122 __ bind(remove_initial_frame); | |
2123 | |
304 | 2124 __ movptr(rdx, STATE(_sender_sp)); |
0 | 2125 __ leave(); |
2126 // get real return | |
304 | 2127 __ pop(rsi); |
0 | 2128 // set stack to sender's sp |
304 | 2129 __ mov(rsp, rdx); |
0 | 2130 // repush real return |
304 | 2131 __ push(rsi); |
0 | 2132 // Enter OSR nmethod |
2133 __ jmp(rax); | |
2134 | |
2135 | |
2136 | |
2137 | |
2138 // Call a new method. All we do is (temporarily) trim the expression stack | |
2139 // push a return address to bring us back to here and leap to the new entry. | |
2140 | |
2141 __ bind(call_method); | |
2142 | |
2143 // stack points to next free location and not top element on expression stack | |
2144 // method expects sp to be pointing to topmost element | |
2145 | |
304 | 2146 __ movptr(rsp, STATE(_stack)); // pop args to c++ interpreter, set sp to java stack top |
2147 __ lea(rsp, Address(rsp, wordSize)); | |
2148 | |
2149 __ movptr(rbx, STATE(_result._to_call._callee)); // get method to execute | |
0 | 2150 |
2151 // don't need a return address if reinvoking interpreter | |
2152 | |
2153 // Make it look like call_stub calling conventions | |
2154 | |
2155 // Get (potential) receiver | |
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2156 // get size of parameters in words |
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2157 __ movptr(rcx, constMethod); |
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2158 __ load_unsigned_short(rcx, Address(rcx, ConstMethod::size_of_parameters_offset())); |
0 | 2159 |
2160 ExternalAddress recursive(CAST_FROM_FN_PTR(address, RecursiveInterpreterActivation)); | |
2161 __ pushptr(recursive.addr()); // make it look good in the debugger | |
2162 | |
2163 InternalAddress entry(entry_point); | |
2164 __ cmpptr(STATE(_result._to_call._callee_entry_point), entry.addr()); // returning to interpreter? | |
2165 __ jcc(Assembler::equal, re_dispatch); // yes | |
2166 | |
304 | 2167 __ pop(rax); // pop dummy address |
0 | 2168 |
2169 | |
2170 // get specialized entry | |
304 | 2171 __ movptr(rax, STATE(_result._to_call._callee_entry_point)); |
0 | 2172 // set sender SP |
304 | 2173 __ mov(sender_sp_on_entry, rsp); |
0 | 2174 |
2175 // method uses specialized entry, push a return so we look like call stub setup | |
2176 // this path will handle fact that result is returned in registers and not | |
2177 // on the java stack. | |
2178 | |
2179 __ pushptr(return_from_native_method.addr()); | |
2180 | |
2181 __ jmp(rax); | |
2182 | |
2183 __ bind(bad_msg); | |
2184 __ stop("Bad message from interpreter"); | |
2185 | |
2186 // Interpreted method "returned" with an exception pass it on... | |
2187 // Pass result, unwind activation and continue/return to interpreter/call_stub | |
2188 // We handle result (if any) differently based on return to interpreter or call_stub | |
2189 | |
2190 Label unwind_initial_with_pending_exception; | |
2191 | |
2192 __ bind(throw_exception); | |
304 | 2193 __ cmpptr(STATE(_prev_link), (int32_t)NULL_WORD); // returning from recursive interpreter call? |
0 | 2194 __ jcc(Assembler::equal, unwind_initial_with_pending_exception); // no, back to native code (call_stub/c1/c2) |
304 | 2195 __ movptr(rax, STATE(_locals)); // pop parameters get new stack value |
2196 __ addptr(rax, wordSize); // account for prepush before we return | |
0 | 2197 __ jmp(unwind_recursive_activation); |
2198 | |
2199 __ bind(unwind_initial_with_pending_exception); | |
2200 | |
2201 // We will unwind the current (initial) interpreter frame and forward | |
2202 // the exception to the caller. We must put the exception in the | |
2203 // expected register and clear pending exception and then forward. | |
2204 | |
2205 __ jmp(unwind_and_forward); | |
2206 | |
2207 interpreter_frame_manager = entry_point; | |
2208 return entry_point; | |
2209 } | |
2210 | |
2211 address AbstractInterpreterGenerator::generate_method_entry(AbstractInterpreter::MethodKind kind) { | |
2212 // determine code generation flags | |
2213 bool synchronized = false; | |
2214 address entry_point = NULL; | |
2215 | |
2216 switch (kind) { | |
2217 case Interpreter::zerolocals : break; | |
2218 case Interpreter::zerolocals_synchronized: synchronized = true; break; | |
2219 case Interpreter::native : entry_point = ((InterpreterGenerator*)this)->generate_native_entry(false); break; | |
2220 case Interpreter::native_synchronized : entry_point = ((InterpreterGenerator*)this)->generate_native_entry(true); break; | |
2221 case Interpreter::empty : entry_point = ((InterpreterGenerator*)this)->generate_empty_entry(); break; | |
2222 case Interpreter::accessor : entry_point = ((InterpreterGenerator*)this)->generate_accessor_entry(); break; | |
2223 case Interpreter::abstract : entry_point = ((InterpreterGenerator*)this)->generate_abstract_entry(); break; | |
710 | 2224 case Interpreter::method_handle : entry_point = ((InterpreterGenerator*)this)->generate_method_handle_entry(); break; |
0 | 2225 |
2226 case Interpreter::java_lang_math_sin : // fall thru | |
2227 case Interpreter::java_lang_math_cos : // fall thru | |
2228 case Interpreter::java_lang_math_tan : // fall thru | |
2229 case Interpreter::java_lang_math_abs : // fall thru | |
2230 case Interpreter::java_lang_math_log : // fall thru | |
2231 case Interpreter::java_lang_math_log10 : // fall thru | |
2232 case Interpreter::java_lang_math_sqrt : entry_point = ((InterpreterGenerator*)this)->generate_math_entry(kind); break; | |
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2233 case Interpreter::java_lang_ref_reference_get |
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2234 : entry_point = ((InterpreterGenerator*)this)->generate_Reference_get_entry(); break; |
0 | 2235 default : ShouldNotReachHere(); break; |
2236 } | |
2237 | |
2238 if (entry_point) return entry_point; | |
2239 | |
2240 return ((InterpreterGenerator*)this)->generate_normal_entry(synchronized); | |
2241 | |
2242 } | |
2243 | |
2244 InterpreterGenerator::InterpreterGenerator(StubQueue* code) | |
2245 : CppInterpreterGenerator(code) { | |
2246 generate_all(); // down here so it can be "virtual" | |
2247 } | |
2248 | |
2249 // Deoptimization helpers for C++ interpreter | |
2250 | |
2251 // How much stack a method activation needs in words. | |
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2252 int AbstractInterpreter::size_top_interpreter_activation(Method* method) { |
0 | 2253 |
2254 const int stub_code = 4; // see generate_call_stub | |
2255 // Save space for one monitor to get into the interpreted method in case | |
2256 // the method is synchronized | |
2257 int monitor_size = method->is_synchronized() ? | |
2258 1*frame::interpreter_frame_monitor_size() : 0; | |
2259 | |
2260 // total static overhead size. Account for interpreter state object, return | |
2261 // address, saved rbp and 2 words for a "static long no_params() method" issue. | |
2262 | |
2263 const int overhead_size = sizeof(BytecodeInterpreter)/wordSize + | |
2264 ( frame::sender_sp_offset - frame::link_offset) + 2; | |
2265 | |
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2266 const int method_stack = (method->max_locals() + method->max_stack()) * |
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2267 Interpreter::stackElementWords; |
0 | 2268 return overhead_size + method_stack + stub_code; |
2269 } | |
2270 | |
2271 // returns the activation size. | |
2272 static int size_activation_helper(int extra_locals_size, int monitor_size) { | |
2273 return (extra_locals_size + // the addition space for locals | |
2274 2*BytesPerWord + // return address and saved rbp | |
2275 2*BytesPerWord + // "static long no_params() method" issue | |
2276 sizeof(BytecodeInterpreter) + // interpreterState | |
2277 monitor_size); // monitors | |
2278 } | |
2279 | |
2280 void BytecodeInterpreter::layout_interpreterState(interpreterState to_fill, | |
2281 frame* caller, | |
2282 frame* current, | |
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2283 Method* method, |
0 | 2284 intptr_t* locals, |
2285 intptr_t* stack, | |
2286 intptr_t* stack_base, | |
2287 intptr_t* monitor_base, | |
2288 intptr_t* frame_bottom, | |
2289 bool is_top_frame | |
2290 ) | |
2291 { | |
2292 // What about any vtable? | |
2293 // | |
2294 to_fill->_thread = JavaThread::current(); | |
2295 // This gets filled in later but make it something recognizable for now | |
2296 to_fill->_bcp = method->code_base(); | |
2297 to_fill->_locals = locals; | |
2298 to_fill->_constants = method->constants()->cache(); | |
2299 to_fill->_method = method; | |
2300 to_fill->_mdx = NULL; | |
2301 to_fill->_stack = stack; | |
2302 if (is_top_frame && JavaThread::current()->popframe_forcing_deopt_reexecution() ) { | |
2303 to_fill->_msg = deopt_resume2; | |
2304 } else { | |
2305 to_fill->_msg = method_resume; | |
2306 } | |
2307 to_fill->_result._to_call._bcp_advance = 0; | |
2308 to_fill->_result._to_call._callee_entry_point = NULL; // doesn't matter to anyone | |
2309 to_fill->_result._to_call._callee = NULL; // doesn't matter to anyone | |
2310 to_fill->_prev_link = NULL; | |
2311 | |
2312 to_fill->_sender_sp = caller->unextended_sp(); | |
2313 | |
2314 if (caller->is_interpreted_frame()) { | |
2315 interpreterState prev = caller->get_interpreterState(); | |
2316 to_fill->_prev_link = prev; | |
2317 // *current->register_addr(GR_Iprev_state) = (intptr_t) prev; | |
2318 // Make the prev callee look proper | |
2319 prev->_result._to_call._callee = method; | |
2320 if (*prev->_bcp == Bytecodes::_invokeinterface) { | |
2321 prev->_result._to_call._bcp_advance = 5; | |
2322 } else { | |
2323 prev->_result._to_call._bcp_advance = 3; | |
2324 } | |
2325 } | |
2326 to_fill->_oop_temp = NULL; | |
2327 to_fill->_stack_base = stack_base; | |
2328 // Need +1 here because stack_base points to the word just above the first expr stack entry | |
2329 // and stack_limit is supposed to point to the word just below the last expr stack entry. | |
2330 // See generate_compute_interpreter_state. | |
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2331 to_fill->_stack_limit = stack_base - (method->max_stack() + 1); |
0 | 2332 to_fill->_monitor_base = (BasicObjectLock*) monitor_base; |
2333 | |
2334 to_fill->_self_link = to_fill; | |
2335 assert(stack >= to_fill->_stack_limit && stack < to_fill->_stack_base, | |
2336 "Stack top out of range"); | |
2337 } | |
2338 | |
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2339 int AbstractInterpreter::layout_activation(Method* method, |
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2340 int tempcount, // |
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2341 int popframe_extra_args, |
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2342 int moncount, |
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2343 int caller_actual_parameters, |
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2344 int callee_param_count, |
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2345 int callee_locals, |
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2346 frame* caller, |
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2347 frame* interpreter_frame, |
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2348 bool is_top_frame, |
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2349 bool is_bottom_frame) { |
0 | 2350 |
2351 assert(popframe_extra_args == 0, "FIX ME"); | |
2352 // NOTE this code must exactly mimic what InterpreterGenerator::generate_compute_interpreter_state() | |
2353 // does as far as allocating an interpreter frame. | |
2354 // If interpreter_frame!=NULL, set up the method, locals, and monitors. | |
2355 // The frame interpreter_frame, if not NULL, is guaranteed to be the right size, | |
2356 // as determined by a previous call to this method. | |
2357 // It is also guaranteed to be walkable even though it is in a skeletal state | |
2358 // NOTE: return size is in words not bytes | |
2359 // NOTE: tempcount is the current size of the java expression stack. For top most | |
2360 // frames we will allocate a full sized expression stack and not the curback | |
2361 // version that non-top frames have. | |
2362 | |
2363 // Calculate the amount our frame will be adjust by the callee. For top frame | |
2364 // this is zero. | |
2365 | |
2366 // NOTE: ia64 seems to do this wrong (or at least backwards) in that it | |
2367 // calculates the extra locals based on itself. Not what the callee does | |
2368 // to it. So it ignores last_frame_adjust value. Seems suspicious as far | |
2369 // as getting sender_sp correct. | |
2370 | |
2371 int extra_locals_size = (callee_locals - callee_param_count) * BytesPerWord; | |
2372 int monitor_size = sizeof(BasicObjectLock) * moncount; | |
2373 | |
2374 // First calculate the frame size without any java expression stack | |
2375 int short_frame_size = size_activation_helper(extra_locals_size, | |
2376 monitor_size); | |
2377 | |
2378 // Now with full size expression stack | |
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2379 int full_frame_size = short_frame_size + method->max_stack() * BytesPerWord; |
0 | 2380 |
2381 // and now with only live portion of the expression stack | |
2382 short_frame_size = short_frame_size + tempcount * BytesPerWord; | |
2383 | |
2384 // the size the activation is right now. Only top frame is full size | |
2385 int frame_size = (is_top_frame ? full_frame_size : short_frame_size); | |
2386 | |
2387 if (interpreter_frame != NULL) { | |
2388 #ifdef ASSERT | |
2389 assert(caller->unextended_sp() == interpreter_frame->interpreter_frame_sender_sp(), "Frame not properly walkable"); | |
2390 #endif | |
2391 | |
2392 // MUCHO HACK | |
2393 | |
2394 intptr_t* frame_bottom = (intptr_t*) ((intptr_t)interpreter_frame->sp() - (full_frame_size - frame_size)); | |
2395 | |
2396 /* Now fillin the interpreterState object */ | |
2397 | |
2398 // The state object is the first thing on the frame and easily located | |
2399 | |
2400 interpreterState cur_state = (interpreterState) ((intptr_t)interpreter_frame->fp() - sizeof(BytecodeInterpreter)); | |
2401 | |
2402 | |
2403 // Find the locals pointer. This is rather simple on x86 because there is no | |
2404 // confusing rounding at the callee to account for. We can trivially locate | |
2405 // our locals based on the current fp(). | |
2406 // Note: the + 2 is for handling the "static long no_params() method" issue. | |
2407 // (too bad I don't really remember that issue well...) | |
2408 | |
2409 intptr_t* locals; | |
2410 // If the caller is interpreted we need to make sure that locals points to the first | |
2411 // argument that the caller passed and not in an area where the stack might have been extended. | |
2412 // because the stack to stack to converter needs a proper locals value in order to remove the | |
2413 // arguments from the caller and place the result in the proper location. Hmm maybe it'd be | |
2414 // simpler if we simply stored the result in the BytecodeInterpreter object and let the c++ code | |
2415 // adjust the stack?? HMMM QQQ | |
2416 // | |
2417 if (caller->is_interpreted_frame()) { | |
2418 // locals must agree with the caller because it will be used to set the | |
2419 // caller's tos when we return. | |
2420 interpreterState prev = caller->get_interpreterState(); | |
2421 // stack() is prepushed. | |
2422 locals = prev->stack() + method->size_of_parameters(); | |
2423 // locals = caller->unextended_sp() + (method->size_of_parameters() - 1); | |
2424 if (locals != interpreter_frame->fp() + frame::sender_sp_offset + (method->max_locals() - 1) + 2) { | |
2425 // os::breakpoint(); | |
2426 } | |
2427 } else { | |
2428 // this is where a c2i would have placed locals (except for the +2) | |
2429 locals = interpreter_frame->fp() + frame::sender_sp_offset + (method->max_locals() - 1) + 2; | |
2430 } | |
2431 | |
2432 intptr_t* monitor_base = (intptr_t*) cur_state; | |
2433 intptr_t* stack_base = (intptr_t*) ((intptr_t) monitor_base - monitor_size); | |
2434 /* +1 because stack is always prepushed */ | |
2435 intptr_t* stack = (intptr_t*) ((intptr_t) stack_base - (tempcount + 1) * BytesPerWord); | |
2436 | |
2437 | |
2438 BytecodeInterpreter::layout_interpreterState(cur_state, | |
2439 caller, | |
2440 interpreter_frame, | |
2441 method, | |
2442 locals, | |
2443 stack, | |
2444 stack_base, | |
2445 monitor_base, | |
2446 frame_bottom, | |
2447 is_top_frame); | |
2448 | |
2449 // BytecodeInterpreter::pd_layout_interpreterState(cur_state, interpreter_return_address, interpreter_frame->fp()); | |
2450 } | |
2451 return frame_size/BytesPerWord; | |
2452 } | |
2453 | |
2454 #endif // CC_INTERP (all) |