Mercurial > hg > truffle
comparison src/cpu/ppc/vm/cppInterpreter_ppc.cpp @ 14408:ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
Summary: With this change the HotSpot core build works on Linux/PPC64. The VM succesfully executes simple test programs.
Reviewed-by: kvn
author | goetz |
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date | Fri, 02 Aug 2013 16:46:45 +0200 |
parents | |
children | 600acc4b8b1e |
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1 /* | |
2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. | |
3 * Copyright 2012, 2013 SAP AG. All rights reserved. | |
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
5 * | |
6 * This code is free software; you can redistribute it and/or modify it | |
7 * under the terms of the GNU General Public License version 2 only, as | |
8 * published by the Free Software Foundation. | |
9 * | |
10 * This code is distributed in the hope that it will be useful, but WITHOUT | |
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
13 * version 2 for more details (a copy is included in the LICENSE file that | |
14 * accompanied this code). | |
15 * | |
16 * You should have received a copy of the GNU General Public License version | |
17 * 2 along with this work; if not, write to the Free Software Foundation, | |
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
19 * | |
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
21 * or visit www.oracle.com if you need additional information or have any | |
22 * questions. | |
23 * | |
24 */ | |
25 | |
26 #include "precompiled.hpp" | |
27 #include "asm/assembler.hpp" | |
28 #include "asm/macroAssembler.inline.hpp" | |
29 #include "interpreter/bytecodeHistogram.hpp" | |
30 #include "interpreter/cppInterpreter.hpp" | |
31 #include "interpreter/interpreter.hpp" | |
32 #include "interpreter/interpreterGenerator.hpp" | |
33 #include "interpreter/interpreterRuntime.hpp" | |
34 #include "oops/arrayOop.hpp" | |
35 #include "oops/methodData.hpp" | |
36 #include "oops/method.hpp" | |
37 #include "oops/oop.inline.hpp" | |
38 #include "prims/jvmtiExport.hpp" | |
39 #include "prims/jvmtiThreadState.hpp" | |
40 #include "runtime/arguments.hpp" | |
41 #include "runtime/deoptimization.hpp" | |
42 #include "runtime/frame.inline.hpp" | |
43 #include "runtime/interfaceSupport.hpp" | |
44 #include "runtime/sharedRuntime.hpp" | |
45 #include "runtime/stubRoutines.hpp" | |
46 #include "runtime/synchronizer.hpp" | |
47 #include "runtime/timer.hpp" | |
48 #include "runtime/vframeArray.hpp" | |
49 #include "utilities/debug.hpp" | |
50 #ifdef SHARK | |
51 #include "shark/shark_globals.hpp" | |
52 #endif | |
53 | |
54 #ifdef CC_INTERP | |
55 | |
56 #define __ _masm-> | |
57 | |
58 // Contains is used for identifying interpreter frames during a stack-walk. | |
59 // A frame with a PC in InterpretMethod must be identified as a normal C frame. | |
60 bool CppInterpreter::contains(address pc) { | |
61 return _code->contains(pc); | |
62 } | |
63 | |
64 #ifdef PRODUCT | |
65 #define BLOCK_COMMENT(str) // nothing | |
66 #else | |
67 #define BLOCK_COMMENT(str) __ block_comment(str) | |
68 #endif | |
69 | |
70 #define BIND(label) bind(label); BLOCK_COMMENT(#label ":") | |
71 | |
72 static address interpreter_frame_manager = NULL; | |
73 static address frame_manager_specialized_return = NULL; | |
74 static address native_entry = NULL; | |
75 | |
76 static address interpreter_return_address = NULL; | |
77 | |
78 static address unctrap_frame_manager_entry = NULL; | |
79 | |
80 static address deopt_frame_manager_return_atos = NULL; | |
81 static address deopt_frame_manager_return_btos = NULL; | |
82 static address deopt_frame_manager_return_itos = NULL; | |
83 static address deopt_frame_manager_return_ltos = NULL; | |
84 static address deopt_frame_manager_return_ftos = NULL; | |
85 static address deopt_frame_manager_return_dtos = NULL; | |
86 static address deopt_frame_manager_return_vtos = NULL; | |
87 | |
88 // A result handler converts/unboxes a native call result into | |
89 // a java interpreter/compiler result. The current frame is an | |
90 // interpreter frame. | |
91 address CppInterpreterGenerator::generate_result_handler_for(BasicType type) { | |
92 return AbstractInterpreterGenerator::generate_result_handler_for(type); | |
93 } | |
94 | |
95 // tosca based result to c++ interpreter stack based result. | |
96 address CppInterpreterGenerator::generate_tosca_to_stack_converter(BasicType type) { | |
97 // | |
98 // A result is in the native abi result register from a native | |
99 // method call. We need to return this result to the interpreter by | |
100 // pushing the result on the interpreter's stack. | |
101 // | |
102 // Registers alive: | |
103 // R3_ARG1(R3_RET)/F1_ARG1(F1_RET) - result to move | |
104 // R4_ARG2 - address of tos | |
105 // LR | |
106 // | |
107 // Registers updated: | |
108 // R3_RET(R3_ARG1) - address of new tos (== R17_tos for T_VOID) | |
109 // | |
110 | |
111 int number_of_used_slots = 1; | |
112 | |
113 const Register tos = R4_ARG2; | |
114 Label done; | |
115 Label is_false; | |
116 | |
117 address entry = __ pc(); | |
118 | |
119 switch (type) { | |
120 case T_BOOLEAN: | |
121 __ cmpwi(CCR0, R3_RET, 0); | |
122 __ beq(CCR0, is_false); | |
123 __ li(R3_RET, 1); | |
124 __ stw(R3_RET, 0, tos); | |
125 __ b(done); | |
126 __ bind(is_false); | |
127 __ li(R3_RET, 0); | |
128 __ stw(R3_RET, 0, tos); | |
129 break; | |
130 case T_BYTE: | |
131 case T_CHAR: | |
132 case T_SHORT: | |
133 case T_INT: | |
134 __ stw(R3_RET, 0, tos); | |
135 break; | |
136 case T_LONG: | |
137 number_of_used_slots = 2; | |
138 // mark unused slot for debugging | |
139 // long goes to topmost slot | |
140 __ std(R3_RET, -BytesPerWord, tos); | |
141 __ li(R3_RET, 0); | |
142 __ std(R3_RET, 0, tos); | |
143 break; | |
144 case T_OBJECT: | |
145 __ verify_oop(R3_RET); | |
146 __ std(R3_RET, 0, tos); | |
147 break; | |
148 case T_FLOAT: | |
149 __ stfs(F1_RET, 0, tos); | |
150 break; | |
151 case T_DOUBLE: | |
152 number_of_used_slots = 2; | |
153 // mark unused slot for debugging | |
154 __ li(R3_RET, 0); | |
155 __ std(R3_RET, 0, tos); | |
156 // double goes to topmost slot | |
157 __ stfd(F1_RET, -BytesPerWord, tos); | |
158 break; | |
159 case T_VOID: | |
160 number_of_used_slots = 0; | |
161 break; | |
162 default: | |
163 ShouldNotReachHere(); | |
164 } | |
165 | |
166 __ BIND(done); | |
167 | |
168 // new expression stack top | |
169 __ addi(R3_RET, tos, -BytesPerWord * number_of_used_slots); | |
170 | |
171 __ blr(); | |
172 | |
173 return entry; | |
174 } | |
175 | |
176 address CppInterpreterGenerator::generate_stack_to_stack_converter(BasicType type) { | |
177 // | |
178 // Copy the result from the callee's stack to the caller's stack, | |
179 // caller and callee both being interpreted. | |
180 // | |
181 // Registers alive | |
182 // R3_ARG1 - address of callee's tos + BytesPerWord | |
183 // R4_ARG2 - address of caller's tos [i.e. free location] | |
184 // LR | |
185 // | |
186 // stack grows upwards, memory grows downwards. | |
187 // | |
188 // [ free ] <-- callee's tos | |
189 // [ optional result ] <-- R3_ARG1 | |
190 // [ optional dummy ] | |
191 // ... | |
192 // [ free ] <-- caller's tos, R4_ARG2 | |
193 // ... | |
194 // Registers updated | |
195 // R3_RET(R3_ARG1) - address of caller's new tos | |
196 // | |
197 // stack grows upwards, memory grows downwards. | |
198 // | |
199 // [ free ] <-- current tos, R3_RET | |
200 // [ optional result ] | |
201 // [ optional dummy ] | |
202 // ... | |
203 // | |
204 | |
205 const Register from = R3_ARG1; | |
206 const Register ret = R3_ARG1; | |
207 const Register tos = R4_ARG2; | |
208 const Register tmp1 = R21_tmp1; | |
209 const Register tmp2 = R22_tmp2; | |
210 | |
211 address entry = __ pc(); | |
212 | |
213 switch (type) { | |
214 case T_BOOLEAN: | |
215 case T_BYTE: | |
216 case T_CHAR: | |
217 case T_SHORT: | |
218 case T_INT: | |
219 case T_FLOAT: | |
220 __ lwz(tmp1, 0, from); | |
221 __ stw(tmp1, 0, tos); | |
222 // New expression stack top. | |
223 __ addi(ret, tos, - BytesPerWord); | |
224 break; | |
225 case T_LONG: | |
226 case T_DOUBLE: | |
227 // Move both entries for debug purposes even though only one is live. | |
228 __ ld(tmp1, BytesPerWord, from); | |
229 __ ld(tmp2, 0, from); | |
230 __ std(tmp1, 0, tos); | |
231 __ std(tmp2, -BytesPerWord, tos); | |
232 // New expression stack top. | |
233 __ addi(ret, tos, - 2 * BytesPerWord); // two slots | |
234 break; | |
235 case T_OBJECT: | |
236 __ ld(tmp1, 0, from); | |
237 __ verify_oop(tmp1); | |
238 __ std(tmp1, 0, tos); | |
239 // New expression stack top. | |
240 __ addi(ret, tos, - BytesPerWord); | |
241 break; | |
242 case T_VOID: | |
243 // New expression stack top. | |
244 __ mr(ret, tos); | |
245 break; | |
246 default: | |
247 ShouldNotReachHere(); | |
248 } | |
249 | |
250 __ blr(); | |
251 | |
252 return entry; | |
253 } | |
254 | |
255 address CppInterpreterGenerator::generate_stack_to_native_abi_converter(BasicType type) { | |
256 // | |
257 // Load a result from the callee's stack into the caller's expecting | |
258 // return register, callee being interpreted, caller being call stub | |
259 // or jit code. | |
260 // | |
261 // Registers alive | |
262 // R3_ARG1 - callee expression tos + BytesPerWord | |
263 // LR | |
264 // | |
265 // stack grows upwards, memory grows downwards. | |
266 // | |
267 // [ free ] <-- callee's tos | |
268 // [ optional result ] <-- R3_ARG1 | |
269 // [ optional dummy ] | |
270 // ... | |
271 // | |
272 // Registers updated | |
273 // R3_RET(R3_ARG1)/F1_RET - result | |
274 // | |
275 | |
276 const Register from = R3_ARG1; | |
277 const Register ret = R3_ARG1; | |
278 const FloatRegister fret = F1_ARG1; | |
279 | |
280 address entry = __ pc(); | |
281 | |
282 // Implemented uniformly for both kinds of endianness. The interpreter | |
283 // implements boolean, byte, char, and short as jint (4 bytes). | |
284 switch (type) { | |
285 case T_BOOLEAN: | |
286 case T_CHAR: | |
287 // zero extension | |
288 __ lwz(ret, 0, from); | |
289 break; | |
290 case T_BYTE: | |
291 case T_SHORT: | |
292 case T_INT: | |
293 // sign extension | |
294 __ lwa(ret, 0, from); | |
295 break; | |
296 case T_LONG: | |
297 __ ld(ret, 0, from); | |
298 break; | |
299 case T_OBJECT: | |
300 __ ld(ret, 0, from); | |
301 __ verify_oop(ret); | |
302 break; | |
303 case T_FLOAT: | |
304 __ lfs(fret, 0, from); | |
305 break; | |
306 case T_DOUBLE: | |
307 __ lfd(fret, 0, from); | |
308 break; | |
309 case T_VOID: | |
310 break; | |
311 default: | |
312 ShouldNotReachHere(); | |
313 } | |
314 | |
315 __ blr(); | |
316 | |
317 return entry; | |
318 } | |
319 | |
320 address CppInterpreter::return_entry(TosState state, int length) { | |
321 assert(interpreter_return_address != NULL, "Not initialized"); | |
322 return interpreter_return_address; | |
323 } | |
324 | |
325 address CppInterpreter::deopt_entry(TosState state, int length) { | |
326 address ret = NULL; | |
327 if (length != 0) { | |
328 switch (state) { | |
329 case atos: ret = deopt_frame_manager_return_atos; break; | |
330 case btos: ret = deopt_frame_manager_return_itos; break; | |
331 case ctos: | |
332 case stos: | |
333 case itos: ret = deopt_frame_manager_return_itos; break; | |
334 case ltos: ret = deopt_frame_manager_return_ltos; break; | |
335 case ftos: ret = deopt_frame_manager_return_ftos; break; | |
336 case dtos: ret = deopt_frame_manager_return_dtos; break; | |
337 case vtos: ret = deopt_frame_manager_return_vtos; break; | |
338 default: ShouldNotReachHere(); | |
339 } | |
340 } else { | |
341 ret = unctrap_frame_manager_entry; // re-execute the bytecode (e.g. uncommon trap, popframe) | |
342 } | |
343 assert(ret != NULL, "Not initialized"); | |
344 return ret; | |
345 } | |
346 | |
347 // | |
348 // Helpers for commoning out cases in the various type of method entries. | |
349 // | |
350 | |
351 // | |
352 // Registers alive | |
353 // R16_thread - JavaThread* | |
354 // R1_SP - old stack pointer | |
355 // R19_method - callee's Method | |
356 // R17_tos - address of caller's tos (prepushed) | |
357 // R15_prev_state - address of caller's BytecodeInterpreter or 0 | |
358 // return_pc in R21_tmp15 (only when called within generate_native_entry) | |
359 // | |
360 // Registers updated | |
361 // R14_state - address of callee's interpreter state | |
362 // R1_SP - new stack pointer | |
363 // CCR4_is_synced - current method is synchronized | |
364 // | |
365 void CppInterpreterGenerator::generate_compute_interpreter_state(Label& stack_overflow_return) { | |
366 // | |
367 // Stack layout at this point: | |
368 // | |
369 // F1 [TOP_IJAVA_FRAME_ABI] <-- R1_SP | |
370 // alignment (optional) | |
371 // [F1's outgoing Java arguments] <-- R17_tos | |
372 // ... | |
373 // F2 [PARENT_IJAVA_FRAME_ABI] | |
374 // ... | |
375 | |
376 //============================================================================= | |
377 // Allocate space for locals other than the parameters, the | |
378 // interpreter state, monitors, and the expression stack. | |
379 | |
380 const Register local_count = R21_tmp1; | |
381 const Register parameter_count = R22_tmp2; | |
382 const Register max_stack = R23_tmp3; | |
383 // Must not be overwritten within this method! | |
384 // const Register return_pc = R29_tmp9; | |
385 | |
386 const ConditionRegister is_synced = CCR4_is_synced; | |
387 const ConditionRegister is_native = CCR6; | |
388 const ConditionRegister is_static = CCR7; | |
389 | |
390 assert(is_synced != is_native, "condition code registers must be distinct"); | |
391 assert(is_synced != is_static, "condition code registers must be distinct"); | |
392 assert(is_native != is_static, "condition code registers must be distinct"); | |
393 | |
394 { | |
395 | |
396 // Local registers | |
397 const Register top_frame_size = R24_tmp4; | |
398 const Register access_flags = R25_tmp5; | |
399 const Register state_offset = R26_tmp6; | |
400 Register mem_stack_limit = R27_tmp7; | |
401 const Register page_size = R28_tmp8; | |
402 | |
403 BLOCK_COMMENT("compute_interpreter_state {"); | |
404 | |
405 // access_flags = method->access_flags(); | |
406 // TODO: PPC port: assert(4 == methodOopDesc::sz_access_flags(), "unexpected field size"); | |
407 __ lwa(access_flags, method_(access_flags)); | |
408 | |
409 // parameter_count = method->constMethod->size_of_parameters(); | |
410 // TODO: PPC port: assert(2 == ConstMethod::sz_size_of_parameters(), "unexpected field size"); | |
411 __ ld(max_stack, in_bytes(Method::const_offset()), R19_method); // Max_stack holds constMethod for a while. | |
412 __ lhz(parameter_count, in_bytes(ConstMethod::size_of_parameters_offset()), max_stack); | |
413 | |
414 // local_count = method->constMethod()->max_locals(); | |
415 // TODO: PPC port: assert(2 == ConstMethod::sz_max_locals(), "unexpected field size"); | |
416 __ lhz(local_count, in_bytes(ConstMethod::size_of_locals_offset()), max_stack); | |
417 | |
418 // max_stack = method->constMethod()->max_stack(); | |
419 // TODO: PPC port: assert(2 == ConstMethod::sz_max_stack(), "unexpected field size"); | |
420 __ lhz(max_stack, in_bytes(ConstMethod::max_stack_offset()), max_stack); | |
421 | |
422 if (EnableInvokeDynamic) { | |
423 // Take into account 'extra_stack_entries' needed by method handles (see method.hpp). | |
424 __ addi(max_stack, max_stack, Method::extra_stack_entries()); | |
425 } | |
426 | |
427 // mem_stack_limit = thread->stack_limit(); | |
428 __ ld(mem_stack_limit, thread_(stack_overflow_limit)); | |
429 | |
430 // Point locals at the first argument. Method's locals are the | |
431 // parameters on top of caller's expression stack. | |
432 | |
433 // tos points past last Java argument | |
434 __ sldi(R18_locals, parameter_count, Interpreter::logStackElementSize); | |
435 __ add(R18_locals, R17_tos, R18_locals); | |
436 | |
437 // R18_locals - i*BytesPerWord points to i-th Java local (i starts at 0) | |
438 | |
439 // Set is_native, is_synced, is_static - will be used later. | |
440 __ testbitdi(is_native, R0, access_flags, JVM_ACC_NATIVE_BIT); | |
441 __ testbitdi(is_synced, R0, access_flags, JVM_ACC_SYNCHRONIZED_BIT); | |
442 assert(is_synced->is_nonvolatile(), "is_synced must be non-volatile"); | |
443 __ testbitdi(is_static, R0, access_flags, JVM_ACC_STATIC_BIT); | |
444 | |
445 // PARENT_IJAVA_FRAME_ABI | |
446 // | |
447 // frame_size = | |
448 // round_to((local_count - parameter_count)*BytesPerWord + | |
449 // 2*BytesPerWord + | |
450 // alignment + | |
451 // frame::interpreter_frame_cinterpreterstate_size_in_bytes() | |
452 // sizeof(PARENT_IJAVA_FRAME_ABI) | |
453 // method->is_synchronized() ? sizeof(BasicObjectLock) : 0 + | |
454 // max_stack*BytesPerWord, | |
455 // 16) | |
456 // | |
457 // Note that this calculation is exactly mirrored by | |
458 // AbstractInterpreter::layout_activation_impl() [ and | |
459 // AbstractInterpreter::size_activation() ]. Which is used by | |
460 // deoptimization so that it can allocate the proper sized | |
461 // frame. This only happens for interpreted frames so the extra | |
462 // notes below about max_stack below are not important. The other | |
463 // thing to note is that for interpreter frames other than the | |
464 // current activation the size of the stack is the size of the live | |
465 // portion of the stack at the particular bcp and NOT the maximum | |
466 // stack that the method might use. | |
467 // | |
468 // If we're calling a native method, we replace max_stack (which is | |
469 // zero) with space for the worst-case signature handler varargs | |
470 // vector, which is: | |
471 // | |
472 // max_stack = max(Argument::n_register_parameters, parameter_count+2); | |
473 // | |
474 // We add two slots to the parameter_count, one for the jni | |
475 // environment and one for a possible native mirror. We allocate | |
476 // space for at least the number of ABI registers, even though | |
477 // InterpreterRuntime::slow_signature_handler won't write more than | |
478 // parameter_count+2 words when it creates the varargs vector at the | |
479 // top of the stack. The generated slow signature handler will just | |
480 // load trash into registers beyond the necessary number. We're | |
481 // still going to cut the stack back by the ABI register parameter | |
482 // count so as to get SP+16 pointing at the ABI outgoing parameter | |
483 // area, so we need to allocate at least that much even though we're | |
484 // going to throw it away. | |
485 // | |
486 | |
487 // Adjust max_stack for native methods: | |
488 Label skip_native_calculate_max_stack; | |
489 __ bfalse(is_native, skip_native_calculate_max_stack); | |
490 // if (is_native) { | |
491 // max_stack = max(Argument::n_register_parameters, parameter_count+2); | |
492 __ addi(max_stack, parameter_count, 2*Interpreter::stackElementWords); | |
493 __ cmpwi(CCR0, max_stack, Argument::n_register_parameters); | |
494 __ bge(CCR0, skip_native_calculate_max_stack); | |
495 __ li(max_stack, Argument::n_register_parameters); | |
496 // } | |
497 __ bind(skip_native_calculate_max_stack); | |
498 // max_stack is now in bytes | |
499 __ slwi(max_stack, max_stack, Interpreter::logStackElementSize); | |
500 | |
501 // Calculate number of non-parameter locals (in slots): | |
502 Label not_java; | |
503 __ btrue(is_native, not_java); | |
504 // if (!is_native) { | |
505 // local_count = non-parameter local count | |
506 __ sub(local_count, local_count, parameter_count); | |
507 // } else { | |
508 // // nothing to do: method->max_locals() == 0 for native methods | |
509 // } | |
510 __ bind(not_java); | |
511 | |
512 | |
513 // Calculate top_frame_size and parent_frame_resize. | |
514 { | |
515 const Register parent_frame_resize = R12_scratch2; | |
516 | |
517 BLOCK_COMMENT("Compute top_frame_size."); | |
518 // top_frame_size = TOP_IJAVA_FRAME_ABI | |
519 // + size of interpreter state | |
520 __ li(top_frame_size, frame::top_ijava_frame_abi_size | |
521 + frame::interpreter_frame_cinterpreterstate_size_in_bytes()); | |
522 // + max_stack | |
523 __ add(top_frame_size, top_frame_size, max_stack); | |
524 // + stack slots for a BasicObjectLock for synchronized methods | |
525 { | |
526 Label not_synced; | |
527 __ bfalse(is_synced, not_synced); | |
528 __ addi(top_frame_size, top_frame_size, frame::interpreter_frame_monitor_size_in_bytes()); | |
529 __ bind(not_synced); | |
530 } | |
531 // align | |
532 __ round_to(top_frame_size, frame::alignment_in_bytes); | |
533 | |
534 | |
535 BLOCK_COMMENT("Compute parent_frame_resize."); | |
536 // parent_frame_resize = R1_SP - R17_tos | |
537 __ sub(parent_frame_resize, R1_SP, R17_tos); | |
538 //__ li(parent_frame_resize, 0); | |
539 // + PARENT_IJAVA_FRAME_ABI | |
540 // + extra two slots for the no-parameter/no-locals | |
541 // method result | |
542 __ addi(parent_frame_resize, parent_frame_resize, | |
543 frame::parent_ijava_frame_abi_size | |
544 + 2*Interpreter::stackElementSize); | |
545 // + (locals_count - params_count) | |
546 __ sldi(R0, local_count, Interpreter::logStackElementSize); | |
547 __ add(parent_frame_resize, parent_frame_resize, R0); | |
548 // align | |
549 __ round_to(parent_frame_resize, frame::alignment_in_bytes); | |
550 | |
551 // | |
552 // Stack layout at this point: | |
553 // | |
554 // The new frame F0 hasn't yet been pushed, F1 is still the top frame. | |
555 // | |
556 // F0 [TOP_IJAVA_FRAME_ABI] | |
557 // alignment (optional) | |
558 // [F0's full operand stack] | |
559 // [F0's monitors] (optional) | |
560 // [F0's BytecodeInterpreter object] | |
561 // F1 [PARENT_IJAVA_FRAME_ABI] | |
562 // alignment (optional) | |
563 // [F0's Java result] | |
564 // [F0's non-arg Java locals] | |
565 // [F1's outgoing Java arguments] <-- R17_tos | |
566 // ... | |
567 // F2 [PARENT_IJAVA_FRAME_ABI] | |
568 // ... | |
569 | |
570 | |
571 // Calculate new R14_state | |
572 // and | |
573 // test that the new memory stack pointer is above the limit, | |
574 // throw a StackOverflowError otherwise. | |
575 __ sub(R11_scratch1/*F1's SP*/, R1_SP, parent_frame_resize); | |
576 __ addi(R14_state, R11_scratch1/*F1's SP*/, | |
577 -frame::interpreter_frame_cinterpreterstate_size_in_bytes()); | |
578 __ sub(R11_scratch1/*F0's SP*/, | |
579 R11_scratch1/*F1's SP*/, top_frame_size); | |
580 | |
581 BLOCK_COMMENT("Test for stack overflow:"); | |
582 __ cmpld(CCR0/*is_stack_overflow*/, R11_scratch1, mem_stack_limit); | |
583 __ blt(CCR0/*is_stack_overflow*/, stack_overflow_return); | |
584 | |
585 | |
586 //============================================================================= | |
587 // Frame_size doesn't overflow the stack. Allocate new frame and | |
588 // initialize interpreter state. | |
589 | |
590 // Register state | |
591 // | |
592 // R15 - local_count | |
593 // R16 - parameter_count | |
594 // R17 - max_stack | |
595 // | |
596 // R18 - frame_size | |
597 // R19 - access_flags | |
598 // CCR4_is_synced - is_synced | |
599 // | |
600 // GR_Lstate - pointer to the uninitialized new BytecodeInterpreter. | |
601 | |
602 // _last_Java_pc just needs to be close enough that we can identify | |
603 // the frame as an interpreted frame. It does not need to be the | |
604 // exact return address from either calling | |
605 // BytecodeInterpreter::InterpretMethod or the call to a jni native method. | |
606 // So we can initialize it here with a value of a bundle in this | |
607 // code fragment. We only do this initialization for java frames | |
608 // where InterpretMethod needs a a way to get a good pc value to | |
609 // store in the thread state. For interpreter frames used to call | |
610 // jni native code we just zero the value in the state and move an | |
611 // ip as needed in the native entry code. | |
612 // | |
613 // const Register last_Java_pc_addr = GR24_SCRATCH; // QQQ 27 | |
614 // const Register last_Java_pc = GR26_SCRATCH; | |
615 | |
616 // Must reference stack before setting new SP since Windows | |
617 // will not be able to deliver the exception on a bad SP. | |
618 // Windows also insists that we bang each page one at a time in order | |
619 // for the OS to map in the reserved pages. If we bang only | |
620 // the final page, Windows stops delivering exceptions to our | |
621 // VectoredExceptionHandler and terminates our program. | |
622 // Linux only requires a single bang but it's rare to have | |
623 // to bang more than 1 page so the code is enabled for both OS's. | |
624 | |
625 // BANG THE STACK | |
626 // | |
627 // Nothing to do for PPC, because updating the SP will automatically | |
628 // bang the page. | |
629 | |
630 // Up to here we have calculated the delta for the new C-frame and | |
631 // checked for a stack-overflow. Now we can savely update SP and | |
632 // resize the C-frame. | |
633 | |
634 // R14_state has already been calculated. | |
635 __ push_interpreter_frame(top_frame_size, parent_frame_resize, | |
636 R25_tmp5, R26_tmp6, R27_tmp7, R28_tmp8); | |
637 | |
638 } | |
639 | |
640 // | |
641 // Stack layout at this point: | |
642 // | |
643 // F0 has been been pushed! | |
644 // | |
645 // F0 [TOP_IJAVA_FRAME_ABI] <-- R1_SP | |
646 // alignment (optional) (now it's here, if required) | |
647 // [F0's full operand stack] | |
648 // [F0's monitors] (optional) | |
649 // [F0's BytecodeInterpreter object] | |
650 // F1 [PARENT_IJAVA_FRAME_ABI] | |
651 // alignment (optional) (now it's here, if required) | |
652 // [F0's Java result] | |
653 // [F0's non-arg Java locals] | |
654 // [F1's outgoing Java arguments] | |
655 // ... | |
656 // F2 [PARENT_IJAVA_FRAME_ABI] | |
657 // ... | |
658 // | |
659 // R14_state points to F0's BytecodeInterpreter object. | |
660 // | |
661 | |
662 } | |
663 | |
664 //============================================================================= | |
665 // new BytecodeInterpreter-object is save, let's initialize it: | |
666 BLOCK_COMMENT("New BytecodeInterpreter-object is save."); | |
667 | |
668 { | |
669 // Locals | |
670 const Register bytecode_addr = R24_tmp4; | |
671 const Register constants = R25_tmp5; | |
672 const Register tos = R26_tmp6; | |
673 const Register stack_base = R27_tmp7; | |
674 const Register local_addr = R28_tmp8; | |
675 { | |
676 Label L; | |
677 __ btrue(is_native, L); | |
678 // if (!is_native) { | |
679 // bytecode_addr = constMethod->codes(); | |
680 __ ld(bytecode_addr, method_(const)); | |
681 __ addi(bytecode_addr, bytecode_addr, in_bytes(ConstMethod::codes_offset())); | |
682 // } | |
683 __ bind(L); | |
684 } | |
685 | |
686 __ ld(constants, in_bytes(Method::const_offset()), R19_method); | |
687 __ ld(constants, in_bytes(ConstMethod::constants_offset()), constants); | |
688 | |
689 // state->_prev_link = prev_state; | |
690 __ std(R15_prev_state, state_(_prev_link)); | |
691 | |
692 // For assertions only. | |
693 // TODO: not needed anyway because it coincides with `_monitor_base'. remove! | |
694 // state->_self_link = state; | |
695 DEBUG_ONLY(__ std(R14_state, state_(_self_link));) | |
696 | |
697 // state->_thread = thread; | |
698 __ std(R16_thread, state_(_thread)); | |
699 | |
700 // state->_method = method; | |
701 __ std(R19_method, state_(_method)); | |
702 | |
703 // state->_locals = locals; | |
704 __ std(R18_locals, state_(_locals)); | |
705 | |
706 // state->_oop_temp = NULL; | |
707 __ li(R0, 0); | |
708 __ std(R0, state_(_oop_temp)); | |
709 | |
710 // state->_last_Java_fp = *R1_SP // Use *R1_SP as fp | |
711 __ ld(R0, _abi(callers_sp), R1_SP); | |
712 __ std(R0, state_(_last_Java_fp)); | |
713 | |
714 BLOCK_COMMENT("load Stack base:"); | |
715 { | |
716 // Stack_base. | |
717 // if (!method->synchronized()) { | |
718 // stack_base = state; | |
719 // } else { | |
720 // stack_base = (uintptr_t)state - sizeof(BasicObjectLock); | |
721 // } | |
722 Label L; | |
723 __ mr(stack_base, R14_state); | |
724 __ bfalse(is_synced, L); | |
725 __ addi(stack_base, stack_base, -frame::interpreter_frame_monitor_size_in_bytes()); | |
726 __ bind(L); | |
727 } | |
728 | |
729 // state->_mdx = NULL; | |
730 __ li(R0, 0); | |
731 __ std(R0, state_(_mdx)); | |
732 | |
733 { | |
734 // if (method->is_native()) state->_bcp = NULL; | |
735 // else state->_bcp = bytecode_addr; | |
736 Label label1, label2; | |
737 __ bfalse(is_native, label1); | |
738 __ std(R0, state_(_bcp)); | |
739 __ b(label2); | |
740 __ bind(label1); | |
741 __ std(bytecode_addr, state_(_bcp)); | |
742 __ bind(label2); | |
743 } | |
744 | |
745 | |
746 // state->_result._to_call._callee = NULL; | |
747 __ std(R0, state_(_result._to_call._callee)); | |
748 | |
749 // state->_monitor_base = state; | |
750 __ std(R14_state, state_(_monitor_base)); | |
751 | |
752 // state->_msg = BytecodeInterpreter::method_entry; | |
753 __ li(R0, BytecodeInterpreter::method_entry); | |
754 __ stw(R0, state_(_msg)); | |
755 | |
756 // state->_last_Java_sp = R1_SP; | |
757 __ std(R1_SP, state_(_last_Java_sp)); | |
758 | |
759 // state->_stack_base = stack_base; | |
760 __ std(stack_base, state_(_stack_base)); | |
761 | |
762 // tos = stack_base - 1 slot (prepushed); | |
763 // state->_stack.Tos(tos); | |
764 __ addi(tos, stack_base, - Interpreter::stackElementSize); | |
765 __ std(tos, state_(_stack)); | |
766 | |
767 | |
768 { | |
769 BLOCK_COMMENT("get last_Java_pc:"); | |
770 // if (!is_native) state->_last_Java_pc = <some_ip_in_this_code_buffer>; | |
771 // else state->_last_Java_pc = NULL; (just for neatness) | |
772 Label label1, label2; | |
773 __ btrue(is_native, label1); | |
774 __ get_PC_trash_LR(R0); | |
775 __ std(R0, state_(_last_Java_pc)); | |
776 __ b(label2); | |
777 __ bind(label1); | |
778 __ li(R0, 0); | |
779 __ std(R0, state_(_last_Java_pc)); | |
780 __ bind(label2); | |
781 } | |
782 | |
783 | |
784 // stack_limit = tos - max_stack; | |
785 __ sub(R0, tos, max_stack); | |
786 // state->_stack_limit = stack_limit; | |
787 __ std(R0, state_(_stack_limit)); | |
788 | |
789 | |
790 // cache = method->constants()->cache(); | |
791 __ ld(R0, ConstantPool::cache_offset_in_bytes(), constants); | |
792 // state->_constants = method->constants()->cache(); | |
793 __ std(R0, state_(_constants)); | |
794 | |
795 | |
796 | |
797 //============================================================================= | |
798 // synchronized method, allocate and initialize method object lock. | |
799 // if (!method->is_synchronized()) goto fill_locals_with_0x0s; | |
800 Label fill_locals_with_0x0s; | |
801 __ bfalse(is_synced, fill_locals_with_0x0s); | |
802 | |
803 // pool_holder = method->constants()->pool_holder(); | |
804 const int mirror_offset = in_bytes(Klass::java_mirror_offset()); | |
805 { | |
806 Label label1, label2; | |
807 // lockee = NULL; for java methods, correct value will be inserted in BytecodeInterpretMethod.hpp | |
808 __ li(R0,0); | |
809 __ bfalse(is_native, label2); | |
810 | |
811 __ bfalse(is_static, label1); | |
812 // if (method->is_static()) lockee = | |
813 // pool_holder->klass_part()->java_mirror(); | |
814 __ ld(R11_scratch1/*pool_holder*/, ConstantPool::pool_holder_offset_in_bytes(), constants); | |
815 __ ld(R0/*lockee*/, mirror_offset, R11_scratch1/*pool_holder*/); | |
816 __ b(label2); | |
817 | |
818 __ bind(label1); | |
819 // else lockee = *(oop*)locals; | |
820 __ ld(R0/*lockee*/, 0, R18_locals); | |
821 __ bind(label2); | |
822 | |
823 // monitor->set_obj(lockee); | |
824 __ std(R0/*lockee*/, BasicObjectLock::obj_offset_in_bytes(), stack_base); | |
825 } | |
826 | |
827 // See if we need to zero the locals | |
828 __ BIND(fill_locals_with_0x0s); | |
829 | |
830 | |
831 //============================================================================= | |
832 // fill locals with 0x0s | |
833 Label locals_zeroed; | |
834 __ btrue(is_native, locals_zeroed); | |
835 | |
836 if (true /* zerolocals */ || ClearInterpreterLocals) { | |
837 // local_count is already num_locals_slots - num_param_slots | |
838 __ sldi(R0, parameter_count, Interpreter::logStackElementSize); | |
839 __ sub(local_addr, R18_locals, R0); | |
840 __ cmpdi(CCR0, local_count, 0); | |
841 __ ble(CCR0, locals_zeroed); | |
842 | |
843 __ mtctr(local_count); | |
844 //__ ld_const_addr(R0, (address) 0xcafe0000babe); | |
845 __ li(R0, 0); | |
846 | |
847 Label zero_slot; | |
848 __ bind(zero_slot); | |
849 | |
850 // first local is at local_addr | |
851 __ std(R0, 0, local_addr); | |
852 __ addi(local_addr, local_addr, -BytesPerWord); | |
853 __ bdnz(zero_slot); | |
854 } | |
855 | |
856 __ BIND(locals_zeroed); | |
857 | |
858 } | |
859 BLOCK_COMMENT("} compute_interpreter_state"); | |
860 } | |
861 | |
862 // Generate code to initiate compilation on invocation counter overflow. | |
863 void CppInterpreterGenerator::generate_counter_overflow(Label& continue_entry) { | |
864 // Registers alive | |
865 // R14_state | |
866 // R16_thread | |
867 // | |
868 // Registers updated | |
869 // R14_state | |
870 // R3_ARG1 (=R3_RET) | |
871 // R4_ARG2 | |
872 | |
873 // After entering the vm we remove the activation and retry the | |
874 // entry point in case the compilation is complete. | |
875 | |
876 // InterpreterRuntime::frequency_counter_overflow takes one argument | |
877 // that indicates if the counter overflow occurs at a backwards | |
878 // branch (NULL bcp). We pass zero. The call returns the address | |
879 // of the verified entry point for the method or NULL if the | |
880 // compilation did not complete (either went background or bailed | |
881 // out). | |
882 __ li(R4_ARG2, 0); | |
883 | |
884 // Pass false to call_VM so it doesn't check for pending exceptions, | |
885 // since at this point in the method invocation the exception | |
886 // handler would try to exit the monitor of synchronized methods | |
887 // which haven't been entered yet. | |
888 // | |
889 // Returns verified_entry_point or NULL, we don't care which. | |
890 // | |
891 // Do not use the variant `frequency_counter_overflow' that returns | |
892 // a structure, because this will change the argument list by a | |
893 // hidden parameter (gcc 4.1). | |
894 | |
895 __ call_VM(noreg, | |
896 CAST_FROM_FN_PTR(address, InterpreterRuntime::frequency_counter_overflow), | |
897 R4_ARG2, | |
898 false); | |
899 // Returns verified_entry_point or NULL, we don't care which as we ignore it | |
900 // and run interpreted. | |
901 | |
902 // Reload method, it may have moved. | |
903 __ ld(R19_method, state_(_method)); | |
904 | |
905 // We jump now to the label "continue_after_compile". | |
906 __ b(continue_entry); | |
907 } | |
908 | |
909 // Increment invocation count and check for overflow. | |
910 // | |
911 // R19_method must contain Method* of method to profile. | |
912 void CppInterpreterGenerator::generate_counter_incr(Label& overflow) { | |
913 Label done; | |
914 const Register Rcounters = R12_scratch2; | |
915 const Register iv_be_count = R11_scratch1; | |
916 const Register invocation_limit = R12_scratch2; | |
917 const Register invocation_limit_addr = invocation_limit; | |
918 | |
919 // Load and ev. allocate MethodCounters object. | |
920 __ get_method_counters(R19_method, Rcounters, done); | |
921 | |
922 // Update standard invocation counters. | |
923 __ increment_invocation_counter(Rcounters, iv_be_count, R0); | |
924 | |
925 // Compare against limit. | |
926 BLOCK_COMMENT("Compare counter against limit:"); | |
927 assert(4 == sizeof(InvocationCounter::InterpreterInvocationLimit), | |
928 "must be 4 bytes"); | |
929 __ load_const(invocation_limit_addr, (address)&InvocationCounter::InterpreterInvocationLimit); | |
930 __ lwa(invocation_limit, 0, invocation_limit_addr); | |
931 __ cmpw(CCR0, iv_be_count, invocation_limit); | |
932 __ bge(CCR0, overflow); | |
933 __ bind(done); | |
934 } | |
935 | |
936 // | |
937 // Call a JNI method. | |
938 // | |
939 // Interpreter stub for calling a native method. (C++ interpreter) | |
940 // This sets up a somewhat different looking stack for calling the native method | |
941 // than the typical interpreter frame setup. | |
942 // | |
943 address CppInterpreterGenerator::generate_native_entry(void) { | |
944 if (native_entry != NULL) return native_entry; | |
945 address entry = __ pc(); | |
946 | |
947 // Read | |
948 // R16_thread | |
949 // R15_prev_state - address of caller's BytecodeInterpreter, if this snippet | |
950 // gets called by the frame manager. | |
951 // R19_method - callee's Method | |
952 // R17_tos - address of caller's tos | |
953 // R1_SP - caller's stack pointer | |
954 // R21_sender_SP - initial caller sp | |
955 // | |
956 // Update | |
957 // R14_state - address of caller's BytecodeInterpreter | |
958 // R3_RET - integer result, if any. | |
959 // F1_RET - float result, if any. | |
960 // | |
961 // | |
962 // Stack layout at this point: | |
963 // | |
964 // 0 [TOP_IJAVA_FRAME_ABI] <-- R1_SP | |
965 // alignment (optional) | |
966 // [outgoing Java arguments] <-- R17_tos | |
967 // ... | |
968 // PARENT [PARENT_IJAVA_FRAME_ABI] | |
969 // ... | |
970 // | |
971 | |
972 const bool inc_counter = UseCompiler || CountCompiledCalls; | |
973 | |
974 const Register signature_handler_fd = R21_tmp1; | |
975 const Register pending_exception = R22_tmp2; | |
976 const Register result_handler_addr = R23_tmp3; | |
977 const Register native_method_fd = R24_tmp4; | |
978 const Register access_flags = R25_tmp5; | |
979 const Register active_handles = R26_tmp6; | |
980 const Register sync_state = R27_tmp7; | |
981 const Register sync_state_addr = sync_state; // Address is dead after use. | |
982 const Register suspend_flags = R24_tmp4; | |
983 | |
984 const Register return_pc = R28_tmp8; // Register will be locked for some time. | |
985 | |
986 const ConditionRegister is_synced = CCR4_is_synced; // Live-on-exit from compute_interpreter_state. | |
987 | |
988 | |
989 // R1_SP still points to caller's SP at this point. | |
990 | |
991 // Save initial_caller_sp to caller's abi. The caller frame must be | |
992 // resized before returning to get rid of the c2i arguments (if | |
993 // any). | |
994 // Override the saved SP with the senderSP so we can pop c2i | |
995 // arguments (if any) off when we return | |
996 __ std(R21_sender_SP, _top_ijava_frame_abi(initial_caller_sp), R1_SP); | |
997 | |
998 // Save LR to caller's frame. We don't use _abi(lr) here, because it is not safe. | |
999 __ mflr(return_pc); | |
1000 __ std(return_pc, _top_ijava_frame_abi(frame_manager_lr), R1_SP); | |
1001 | |
1002 assert(return_pc->is_nonvolatile(), "return_pc must be a non-volatile register"); | |
1003 | |
1004 __ verify_method_ptr(R19_method); | |
1005 | |
1006 //============================================================================= | |
1007 | |
1008 // If this snippet gets called by the frame manager (at label | |
1009 // `call_special'), then R15_prev_state is valid. If this snippet | |
1010 // is not called by the frame manager, but e.g. by the call stub or | |
1011 // by compiled code, then R15_prev_state is invalid. | |
1012 { | |
1013 // Set R15_prev_state to 0 if we don't return to the frame | |
1014 // manager; we will return to the call_stub or to compiled code | |
1015 // instead. If R15_prev_state is 0 there will be only one | |
1016 // interpreter frame (we will set this up later) in this C frame! | |
1017 // So we must take care about retrieving prev_state_(_prev_link) | |
1018 // and restoring R1_SP when popping that interpreter. | |
1019 Label prev_state_is_valid; | |
1020 | |
1021 __ load_const(R11_scratch1/*frame_manager_returnpc_addr*/, (address)&frame_manager_specialized_return); | |
1022 __ ld(R12_scratch2/*frame_manager_returnpc*/, 0, R11_scratch1/*frame_manager_returnpc_addr*/); | |
1023 __ cmpd(CCR0, return_pc, R12_scratch2/*frame_manager_returnpc*/); | |
1024 __ beq(CCR0, prev_state_is_valid); | |
1025 | |
1026 __ li(R15_prev_state, 0); | |
1027 | |
1028 __ BIND(prev_state_is_valid); | |
1029 } | |
1030 | |
1031 //============================================================================= | |
1032 // Allocate new frame and initialize interpreter state. | |
1033 | |
1034 Label exception_return; | |
1035 Label exception_return_sync_check; | |
1036 Label stack_overflow_return; | |
1037 | |
1038 // Generate new interpreter state and jump to stack_overflow_return in case of | |
1039 // a stack overflow. | |
1040 generate_compute_interpreter_state(stack_overflow_return); | |
1041 | |
1042 //============================================================================= | |
1043 // Increment invocation counter. On overflow, entry to JNI method | |
1044 // will be compiled. | |
1045 Label invocation_counter_overflow; | |
1046 if (inc_counter) { | |
1047 generate_counter_incr(invocation_counter_overflow); | |
1048 } | |
1049 | |
1050 Label continue_after_compile; | |
1051 __ BIND(continue_after_compile); | |
1052 | |
1053 // access_flags = method->access_flags(); | |
1054 // Load access flags. | |
1055 assert(access_flags->is_nonvolatile(), | |
1056 "access_flags must be in a non-volatile register"); | |
1057 // Type check. | |
1058 // TODO: PPC port: assert(4 == methodOopDesc::sz_access_flags(), "unexpected field size"); | |
1059 __ lwz(access_flags, method_(access_flags)); | |
1060 | |
1061 // We don't want to reload R19_method and access_flags after calls | |
1062 // to some helper functions. | |
1063 assert(R19_method->is_nonvolatile(), "R19_method must be a non-volatile register"); | |
1064 | |
1065 // Check for synchronized methods. Must happen AFTER invocation counter | |
1066 // check, so method is not locked if counter overflows. | |
1067 | |
1068 { | |
1069 Label method_is_not_synced; | |
1070 // Is_synced is still alive. | |
1071 assert(is_synced->is_nonvolatile(), "is_synced must be non-volatile"); | |
1072 __ bfalse(is_synced, method_is_not_synced); | |
1073 | |
1074 lock_method(); | |
1075 // Reload method, it may have moved. | |
1076 __ ld(R19_method, state_(_method)); | |
1077 | |
1078 __ BIND(method_is_not_synced); | |
1079 } | |
1080 | |
1081 // jvmti/jvmpi support | |
1082 __ notify_method_entry(); | |
1083 | |
1084 // Reload method, it may have moved. | |
1085 __ ld(R19_method, state_(_method)); | |
1086 | |
1087 //============================================================================= | |
1088 // Get and call the signature handler | |
1089 | |
1090 __ ld(signature_handler_fd, method_(signature_handler)); | |
1091 Label call_signature_handler; | |
1092 | |
1093 __ cmpdi(CCR0, signature_handler_fd, 0); | |
1094 __ bne(CCR0, call_signature_handler); | |
1095 | |
1096 // Method has never been called. Either generate a specialized | |
1097 // handler or point to the slow one. | |
1098 // | |
1099 // Pass parameter 'false' to avoid exception check in call_VM. | |
1100 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::prepare_native_call), R19_method, false); | |
1101 | |
1102 // Check for an exception while looking up the target method. If we | |
1103 // incurred one, bail. | |
1104 __ ld(pending_exception, thread_(pending_exception)); | |
1105 __ cmpdi(CCR0, pending_exception, 0); | |
1106 __ bne(CCR0, exception_return_sync_check); // has pending exception | |
1107 | |
1108 // reload method | |
1109 __ ld(R19_method, state_(_method)); | |
1110 | |
1111 // Reload signature handler, it may have been created/assigned in the meanwhile | |
1112 __ ld(signature_handler_fd, method_(signature_handler)); | |
1113 | |
1114 __ BIND(call_signature_handler); | |
1115 | |
1116 // Before we call the signature handler we push a new frame to | |
1117 // protect the interpreter frame volatile registers when we return | |
1118 // from jni but before we can get back to Java. | |
1119 | |
1120 // First set the frame anchor while the SP/FP registers are | |
1121 // convenient and the slow signature handler can use this same frame | |
1122 // anchor. | |
1123 | |
1124 // We have a TOP_IJAVA_FRAME here, which belongs to us. | |
1125 __ set_top_ijava_frame_at_SP_as_last_Java_frame(R1_SP, R12_scratch2/*tmp*/); | |
1126 | |
1127 // Now the interpreter frame (and its call chain) have been | |
1128 // invalidated and flushed. We are now protected against eager | |
1129 // being enabled in native code. Even if it goes eager the | |
1130 // registers will be reloaded as clean and we will invalidate after | |
1131 // the call so no spurious flush should be possible. | |
1132 | |
1133 // Call signature handler and pass locals address. | |
1134 // | |
1135 // Our signature handlers copy required arguments to the C stack | |
1136 // (outgoing C args), R3_ARG1 to R10_ARG8, and F1_ARG1 to | |
1137 // F13_ARG13. | |
1138 __ mr(R3_ARG1, R18_locals); | |
1139 __ ld(signature_handler_fd, 0, signature_handler_fd); | |
1140 __ call_stub(signature_handler_fd); | |
1141 // reload method | |
1142 __ ld(R19_method, state_(_method)); | |
1143 | |
1144 // Remove the register parameter varargs slots we allocated in | |
1145 // compute_interpreter_state. SP+16 ends up pointing to the ABI | |
1146 // outgoing argument area. | |
1147 // | |
1148 // Not needed on PPC64. | |
1149 //__ add(SP, SP, Argument::n_register_parameters*BytesPerWord); | |
1150 | |
1151 assert(result_handler_addr->is_nonvolatile(), "result_handler_addr must be in a non-volatile register"); | |
1152 // Save across call to native method. | |
1153 __ mr(result_handler_addr, R3_RET); | |
1154 | |
1155 // Set up fixed parameters and call the native method. | |
1156 // If the method is static, get mirror into R4_ARG2. | |
1157 | |
1158 { | |
1159 Label method_is_not_static; | |
1160 // access_flags is non-volatile and still, no need to restore it | |
1161 | |
1162 // restore access flags | |
1163 __ testbitdi(CCR0, R0, access_flags, JVM_ACC_STATIC_BIT); | |
1164 __ bfalse(CCR0, method_is_not_static); | |
1165 | |
1166 // constants = method->constants(); | |
1167 __ ld(R11_scratch1, in_bytes(Method::const_offset()), R19_method); | |
1168 __ ld(R11_scratch1/*constants*/, in_bytes(ConstMethod::constants_offset()), R11_scratch1); | |
1169 // pool_holder = method->constants()->pool_holder(); | |
1170 __ ld(R11_scratch1/*pool_holder*/, ConstantPool::pool_holder_offset_in_bytes(), | |
1171 R11_scratch1/*constants*/); | |
1172 | |
1173 const int mirror_offset = in_bytes(Klass::java_mirror_offset()); | |
1174 | |
1175 // mirror = pool_holder->klass_part()->java_mirror(); | |
1176 __ ld(R0/*mirror*/, mirror_offset, R11_scratch1/*pool_holder*/); | |
1177 // state->_native_mirror = mirror; | |
1178 __ std(R0/*mirror*/, state_(_oop_temp)); | |
1179 // R4_ARG2 = &state->_oop_temp; | |
1180 __ addir(R4_ARG2, state_(_oop_temp)); | |
1181 | |
1182 __ BIND(method_is_not_static); | |
1183 } | |
1184 | |
1185 // At this point, arguments have been copied off the stack into | |
1186 // their JNI positions. Oops are boxed in-place on the stack, with | |
1187 // handles copied to arguments. The result handler address is in a | |
1188 // register. | |
1189 | |
1190 // pass JNIEnv address as first parameter | |
1191 __ addir(R3_ARG1, thread_(jni_environment)); | |
1192 | |
1193 // Load the native_method entry before we change the thread state. | |
1194 __ ld(native_method_fd, method_(native_function)); | |
1195 | |
1196 //============================================================================= | |
1197 // Transition from _thread_in_Java to _thread_in_native. As soon as | |
1198 // we make this change the safepoint code needs to be certain that | |
1199 // the last Java frame we established is good. The pc in that frame | |
1200 // just needs to be near here not an actual return address. | |
1201 | |
1202 // We use release_store_fence to update values like the thread state, where | |
1203 // we don't want the current thread to continue until all our prior memory | |
1204 // accesses (including the new thread state) are visible to other threads. | |
1205 __ li(R0, _thread_in_native); | |
1206 __ release(); | |
1207 | |
1208 // TODO: PPC port: assert(4 == JavaThread::sz_thread_state(), "unexpected field size"); | |
1209 __ stw(R0, thread_(thread_state)); | |
1210 | |
1211 if (UseMembar) { | |
1212 __ fence(); | |
1213 } | |
1214 | |
1215 //============================================================================= | |
1216 // Call the native method. Argument registers must not have been | |
1217 // overwritten since "__ call_stub(signature_handler);" (except for | |
1218 // ARG1 and ARG2 for static methods) | |
1219 __ call_c(native_method_fd); | |
1220 | |
1221 __ std(R3_RET, state_(_native_lresult)); | |
1222 __ stfd(F1_RET, state_(_native_fresult)); | |
1223 | |
1224 // The frame_manager_lr field, which we use for setting the last | |
1225 // java frame, gets overwritten by the signature handler. Restore | |
1226 // it now. | |
1227 __ get_PC_trash_LR(R11_scratch1); | |
1228 __ std(R11_scratch1, _top_ijava_frame_abi(frame_manager_lr), R1_SP); | |
1229 | |
1230 // Because of GC R19_method may no longer be valid. | |
1231 | |
1232 // Block, if necessary, before resuming in _thread_in_Java state. | |
1233 // In order for GC to work, don't clear the last_Java_sp until after | |
1234 // blocking. | |
1235 | |
1236 | |
1237 | |
1238 //============================================================================= | |
1239 // Switch thread to "native transition" state before reading the | |
1240 // synchronization state. This additional state is necessary | |
1241 // because reading and testing the synchronization state is not | |
1242 // atomic w.r.t. GC, as this scenario demonstrates: Java thread A, | |
1243 // in _thread_in_native state, loads _not_synchronized and is | |
1244 // preempted. VM thread changes sync state to synchronizing and | |
1245 // suspends threads for GC. Thread A is resumed to finish this | |
1246 // native method, but doesn't block here since it didn't see any | |
1247 // synchronization in progress, and escapes. | |
1248 | |
1249 // We use release_store_fence to update values like the thread state, where | |
1250 // we don't want the current thread to continue until all our prior memory | |
1251 // accesses (including the new thread state) are visible to other threads. | |
1252 __ li(R0/*thread_state*/, _thread_in_native_trans); | |
1253 __ release(); | |
1254 __ stw(R0/*thread_state*/, thread_(thread_state)); | |
1255 if (UseMembar) { | |
1256 __ fence(); | |
1257 } | |
1258 // Write serialization page so that the VM thread can do a pseudo remote | |
1259 // membar. We use the current thread pointer to calculate a thread | |
1260 // specific offset to write to within the page. This minimizes bus | |
1261 // traffic due to cache line collision. | |
1262 else { | |
1263 __ serialize_memory(R16_thread, R11_scratch1, R12_scratch2); | |
1264 } | |
1265 | |
1266 // Now before we return to java we must look for a current safepoint | |
1267 // (a new safepoint can not start since we entered native_trans). | |
1268 // We must check here because a current safepoint could be modifying | |
1269 // the callers registers right this moment. | |
1270 | |
1271 // Acquire isn't strictly necessary here because of the fence, but | |
1272 // sync_state is declared to be volatile, so we do it anyway. | |
1273 __ load_const(sync_state_addr, SafepointSynchronize::address_of_state()); | |
1274 | |
1275 // TODO: PPC port: assert(4 == SafepointSynchronize::sz_state(), "unexpected field size"); | |
1276 __ lwz(sync_state, 0, sync_state_addr); | |
1277 | |
1278 // TODO: PPC port: assert(4 == Thread::sz_suspend_flags(), "unexpected field size"); | |
1279 __ lwz(suspend_flags, thread_(suspend_flags)); | |
1280 | |
1281 __ acquire(); | |
1282 | |
1283 Label sync_check_done; | |
1284 Label do_safepoint; | |
1285 // No synchronization in progress nor yet synchronized | |
1286 __ cmpwi(CCR0, sync_state, SafepointSynchronize::_not_synchronized); | |
1287 // not suspended | |
1288 __ cmpwi(CCR1, suspend_flags, 0); | |
1289 | |
1290 __ bne(CCR0, do_safepoint); | |
1291 __ beq(CCR1, sync_check_done); | |
1292 __ bind(do_safepoint); | |
1293 // Block. We do the call directly and leave the current | |
1294 // last_Java_frame setup undisturbed. We must save any possible | |
1295 // native result acrosss the call. No oop is present | |
1296 | |
1297 __ mr(R3_ARG1, R16_thread); | |
1298 __ call_c(CAST_FROM_FN_PTR(FunctionDescriptor*, JavaThread::check_special_condition_for_native_trans), | |
1299 relocInfo::none); | |
1300 __ bind(sync_check_done); | |
1301 | |
1302 //============================================================================= | |
1303 // <<<<<< Back in Interpreter Frame >>>>> | |
1304 | |
1305 // We are in thread_in_native_trans here and back in the normal | |
1306 // interpreter frame. We don't have to do anything special about | |
1307 // safepoints and we can switch to Java mode anytime we are ready. | |
1308 | |
1309 // Note: frame::interpreter_frame_result has a dependency on how the | |
1310 // method result is saved across the call to post_method_exit. For | |
1311 // native methods it assumes that the non-FPU/non-void result is | |
1312 // saved in _native_lresult and a FPU result in _native_fresult. If | |
1313 // this changes then the interpreter_frame_result implementation | |
1314 // will need to be updated too. | |
1315 | |
1316 // On PPC64, we have stored the result directly after the native call. | |
1317 | |
1318 //============================================================================= | |
1319 // back in Java | |
1320 | |
1321 // We use release_store_fence to update values like the thread state, where | |
1322 // we don't want the current thread to continue until all our prior memory | |
1323 // accesses (including the new thread state) are visible to other threads. | |
1324 __ li(R0/*thread_state*/, _thread_in_Java); | |
1325 __ release(); | |
1326 __ stw(R0/*thread_state*/, thread_(thread_state)); | |
1327 if (UseMembar) { | |
1328 __ fence(); | |
1329 } | |
1330 | |
1331 __ reset_last_Java_frame(); | |
1332 | |
1333 // Reload GR27_method, call killed it. We can't look at | |
1334 // state->_method until we're back in java state because in java | |
1335 // state gc can't happen until we get to a safepoint. | |
1336 // | |
1337 // We've set thread_state to _thread_in_Java already, so restoring | |
1338 // R19_method from R14_state works; R19_method is invalid, because | |
1339 // GC may have happened. | |
1340 __ ld(R19_method, state_(_method)); // reload method, may have moved | |
1341 | |
1342 // jvmdi/jvmpi support. Whether we've got an exception pending or | |
1343 // not, and whether unlocking throws an exception or not, we notify | |
1344 // on native method exit. If we do have an exception, we'll end up | |
1345 // in the caller's context to handle it, so if we don't do the | |
1346 // notify here, we'll drop it on the floor. | |
1347 | |
1348 __ notify_method_exit(true/*native method*/, | |
1349 ilgl /*illegal state (not used for native methods)*/); | |
1350 | |
1351 | |
1352 | |
1353 //============================================================================= | |
1354 // Handle exceptions | |
1355 | |
1356 // See if we must unlock. | |
1357 // | |
1358 { | |
1359 Label method_is_not_synced; | |
1360 // is_synced is still alive | |
1361 assert(is_synced->is_nonvolatile(), "is_synced must be non-volatile"); | |
1362 __ bfalse(is_synced, method_is_not_synced); | |
1363 | |
1364 unlock_method(); | |
1365 | |
1366 __ bind(method_is_not_synced); | |
1367 } | |
1368 | |
1369 // Reset active handles after returning from native. | |
1370 // thread->active_handles()->clear(); | |
1371 __ ld(active_handles, thread_(active_handles)); | |
1372 // JNIHandleBlock::_top is an int. | |
1373 // TODO: PPC port: assert(4 == JNIHandleBlock::top_size_in_bytes(), "unexpected field size"); | |
1374 __ li(R0, 0); | |
1375 __ stw(R0, JNIHandleBlock::top_offset_in_bytes(), active_handles); | |
1376 | |
1377 Label no_pending_exception_from_native_method; | |
1378 __ ld(R0/*pending_exception*/, thread_(pending_exception)); | |
1379 __ cmpdi(CCR0, R0/*pending_exception*/, 0); | |
1380 __ beq(CCR0, no_pending_exception_from_native_method); | |
1381 | |
1382 | |
1383 //----------------------------------------------------------------------------- | |
1384 // An exception is pending. We call into the runtime only if the | |
1385 // caller was not interpreted. If it was interpreted the | |
1386 // interpreter will do the correct thing. If it isn't interpreted | |
1387 // (call stub/compiled code) we will change our return and continue. | |
1388 __ BIND(exception_return); | |
1389 | |
1390 Label return_to_initial_caller_with_pending_exception; | |
1391 __ cmpdi(CCR0, R15_prev_state, 0); | |
1392 __ beq(CCR0, return_to_initial_caller_with_pending_exception); | |
1393 | |
1394 // We are returning to an interpreter activation, just pop the state, | |
1395 // pop our frame, leave the exception pending, and return. | |
1396 __ pop_interpreter_state(/*prev_state_may_be_0=*/false); | |
1397 __ pop_interpreter_frame(R11_scratch1, R12_scratch2, R21_tmp1 /* set to return pc */, R22_tmp2); | |
1398 __ mtlr(R21_tmp1); | |
1399 __ blr(); | |
1400 | |
1401 __ BIND(exception_return_sync_check); | |
1402 | |
1403 assert(is_synced->is_nonvolatile(), "is_synced must be non-volatile"); | |
1404 __ bfalse(is_synced, exception_return); | |
1405 unlock_method(); | |
1406 __ b(exception_return); | |
1407 | |
1408 | |
1409 __ BIND(return_to_initial_caller_with_pending_exception); | |
1410 // We are returning to a c2i-adapter / call-stub, get the address of the | |
1411 // exception handler, pop the frame and return to the handler. | |
1412 | |
1413 // First, pop to caller's frame. | |
1414 __ pop_interpreter_frame(R11_scratch1, R12_scratch2, R21_tmp1 /* set to return pc */, R22_tmp2); | |
1415 | |
1416 __ push_frame_abi112(0, R11_scratch1); | |
1417 // Get the address of the exception handler. | |
1418 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), | |
1419 R16_thread, | |
1420 R21_tmp1 /* return pc */); | |
1421 __ pop_frame(); | |
1422 | |
1423 // Load the PC of the the exception handler into LR. | |
1424 __ mtlr(R3_RET); | |
1425 | |
1426 // Load exception into R3_ARG1 and clear pending exception in thread. | |
1427 __ ld(R3_ARG1/*exception*/, thread_(pending_exception)); | |
1428 __ li(R4_ARG2, 0); | |
1429 __ std(R4_ARG2, thread_(pending_exception)); | |
1430 | |
1431 // Load the original return pc into R4_ARG2. | |
1432 __ mr(R4_ARG2/*issuing_pc*/, R21_tmp1); | |
1433 | |
1434 // Resize frame to get rid of a potential extension. | |
1435 __ resize_frame_to_initial_caller(R11_scratch1, R12_scratch2); | |
1436 | |
1437 // Return to exception handler. | |
1438 __ blr(); | |
1439 | |
1440 | |
1441 //----------------------------------------------------------------------------- | |
1442 // No exception pending. | |
1443 __ BIND(no_pending_exception_from_native_method); | |
1444 | |
1445 // Move native method result back into proper registers and return. | |
1446 // Invoke result handler (may unbox/promote). | |
1447 __ ld(R3_RET, state_(_native_lresult)); | |
1448 __ lfd(F1_RET, state_(_native_fresult)); | |
1449 __ call_stub(result_handler_addr); | |
1450 | |
1451 // We have created a new BytecodeInterpreter object, now we must destroy it. | |
1452 // | |
1453 // Restore previous R14_state and caller's SP. R15_prev_state may | |
1454 // be 0 here, because our caller may be the call_stub or compiled | |
1455 // code. | |
1456 __ pop_interpreter_state(/*prev_state_may_be_0=*/true); | |
1457 __ pop_interpreter_frame(R11_scratch1, R12_scratch2, R21_tmp1 /* set to return pc */, R22_tmp2); | |
1458 // Resize frame to get rid of a potential extension. | |
1459 __ resize_frame_to_initial_caller(R11_scratch1, R12_scratch2); | |
1460 | |
1461 // Must use the return pc which was loaded from the caller's frame | |
1462 // as the VM uses return-pc-patching for deoptimization. | |
1463 __ mtlr(R21_tmp1); | |
1464 __ blr(); | |
1465 | |
1466 | |
1467 | |
1468 //============================================================================= | |
1469 // We encountered an exception while computing the interpreter | |
1470 // state, so R14_state isn't valid. Act as if we just returned from | |
1471 // the callee method with a pending exception. | |
1472 __ BIND(stack_overflow_return); | |
1473 | |
1474 // | |
1475 // Register state: | |
1476 // R14_state invalid; trashed by compute_interpreter_state | |
1477 // R15_prev_state valid, but may be 0 | |
1478 // | |
1479 // R1_SP valid, points to caller's SP; wasn't yet updated by | |
1480 // compute_interpreter_state | |
1481 // | |
1482 | |
1483 // Create exception oop and make it pending. | |
1484 | |
1485 // Throw the exception via RuntimeStub "throw_StackOverflowError_entry". | |
1486 // | |
1487 // Previously, we called C-Code directly. As a consequence, a | |
1488 // possible GC tried to process the argument oops of the top frame | |
1489 // (see RegisterMap::clear, which sets the corresponding flag to | |
1490 // true). This lead to crashes because: | |
1491 // 1. The top register map did not contain locations for the argument registers | |
1492 // 2. The arguments are dead anyway, could be already overwritten in the worst case | |
1493 // Solution: Call via special runtime stub that pushes it's own | |
1494 // frame. This runtime stub has the flag "CodeBlob::caller_must_gc_arguments()" | |
1495 // set to "false", what prevents the dead arguments getting GC'd. | |
1496 // | |
1497 // 2 cases exist: | |
1498 // 1. We were called by the c2i adapter / call stub | |
1499 // 2. We were called by the frame manager | |
1500 // | |
1501 // Both cases are handled by this code: | |
1502 // 1. - initial_caller_sp was saved in both cases on entry, so it's safe to load it back even if it was not changed. | |
1503 // - control flow will be: | |
1504 // throw_stackoverflow_stub->VM->throw_stackoverflow_stub->forward_excep->excp_blob of caller method | |
1505 // 2. - control flow will be: | |
1506 // throw_stackoverflow_stub->VM->throw_stackoverflow_stub->forward_excep->rethrow_excp_entry of frame manager->resume_method | |
1507 // Since we restored the caller SP above, the rethrow_excp_entry can restore the original interpreter state | |
1508 // registers using the stack and resume the calling method with a pending excp. | |
1509 | |
1510 // Pop any c2i extension from the stack, restore LR just to be sure | |
1511 __ ld(R0, _top_ijava_frame_abi(frame_manager_lr), R1_SP); | |
1512 __ mtlr(R0); | |
1513 // Resize frame to get rid of a potential extension. | |
1514 __ resize_frame_to_initial_caller(R11_scratch1, R12_scratch2); | |
1515 | |
1516 // Load target address of the runtime stub. | |
1517 __ load_const(R12_scratch2, (StubRoutines::throw_StackOverflowError_entry())); | |
1518 __ mtctr(R12_scratch2); | |
1519 __ bctr(); | |
1520 | |
1521 | |
1522 //============================================================================= | |
1523 // Counter overflow. | |
1524 | |
1525 if (inc_counter) { | |
1526 // Handle invocation counter overflow | |
1527 __ bind(invocation_counter_overflow); | |
1528 | |
1529 generate_counter_overflow(continue_after_compile); | |
1530 } | |
1531 | |
1532 native_entry = entry; | |
1533 return entry; | |
1534 } | |
1535 | |
1536 bool AbstractInterpreter::can_be_compiled(methodHandle m) { | |
1537 // No special entry points that preclude compilation. | |
1538 return true; | |
1539 } | |
1540 | |
1541 // Unlock the current method. | |
1542 // | |
1543 void CppInterpreterGenerator::unlock_method(void) { | |
1544 // Find preallocated monitor and unlock method. Method monitor is | |
1545 // the first one. | |
1546 | |
1547 // Registers alive | |
1548 // R14_state | |
1549 // | |
1550 // Registers updated | |
1551 // volatiles | |
1552 // | |
1553 const Register monitor = R4_ARG2; | |
1554 | |
1555 // Pass address of initial monitor we allocated. | |
1556 // | |
1557 // First monitor. | |
1558 __ addi(monitor, R14_state, -frame::interpreter_frame_monitor_size_in_bytes()); | |
1559 | |
1560 // Unlock method | |
1561 __ unlock_object(monitor); | |
1562 } | |
1563 | |
1564 // Lock the current method. | |
1565 // | |
1566 void CppInterpreterGenerator::lock_method(void) { | |
1567 // Find preallocated monitor and lock method. Method monitor is the | |
1568 // first one. | |
1569 | |
1570 // | |
1571 // Registers alive | |
1572 // R14_state | |
1573 // | |
1574 // Registers updated | |
1575 // volatiles | |
1576 // | |
1577 | |
1578 const Register monitor = R4_ARG2; | |
1579 const Register object = R5_ARG3; | |
1580 | |
1581 // Pass address of initial monitor we allocated. | |
1582 __ addi(monitor, R14_state, -frame::interpreter_frame_monitor_size_in_bytes()); | |
1583 | |
1584 // Pass object address. | |
1585 __ ld(object, BasicObjectLock::obj_offset_in_bytes(), monitor); | |
1586 | |
1587 // Lock method. | |
1588 __ lock_object(monitor, object); | |
1589 } | |
1590 | |
1591 // Generate code for handling resuming a deopted method. | |
1592 void CppInterpreterGenerator::generate_deopt_handling(Register result_index) { | |
1593 | |
1594 //============================================================================= | |
1595 // Returning from a compiled method into a deopted method. The | |
1596 // bytecode at the bcp has completed. The result of the bytecode is | |
1597 // in the native abi (the tosca for the template based | |
1598 // interpreter). Any stack space that was used by the bytecode that | |
1599 // has completed has been removed (e.g. parameters for an invoke) so | |
1600 // all that we have to do is place any pending result on the | |
1601 // expression stack and resume execution on the next bytecode. | |
1602 | |
1603 Label return_from_deopt_common; | |
1604 | |
1605 // R3_RET and F1_RET are live here! Load the array index of the | |
1606 // required result stub address and continue at return_from_deopt_common. | |
1607 | |
1608 // Deopt needs to jump to here to enter the interpreter (return a result). | |
1609 deopt_frame_manager_return_atos = __ pc(); | |
1610 __ li(result_index, AbstractInterpreter::BasicType_as_index(T_OBJECT)); | |
1611 __ b(return_from_deopt_common); | |
1612 | |
1613 deopt_frame_manager_return_btos = __ pc(); | |
1614 __ li(result_index, AbstractInterpreter::BasicType_as_index(T_BOOLEAN)); | |
1615 __ b(return_from_deopt_common); | |
1616 | |
1617 deopt_frame_manager_return_itos = __ pc(); | |
1618 __ li(result_index, AbstractInterpreter::BasicType_as_index(T_INT)); | |
1619 __ b(return_from_deopt_common); | |
1620 | |
1621 deopt_frame_manager_return_ltos = __ pc(); | |
1622 __ li(result_index, AbstractInterpreter::BasicType_as_index(T_LONG)); | |
1623 __ b(return_from_deopt_common); | |
1624 | |
1625 deopt_frame_manager_return_ftos = __ pc(); | |
1626 __ li(result_index, AbstractInterpreter::BasicType_as_index(T_FLOAT)); | |
1627 __ b(return_from_deopt_common); | |
1628 | |
1629 deopt_frame_manager_return_dtos = __ pc(); | |
1630 __ li(result_index, AbstractInterpreter::BasicType_as_index(T_DOUBLE)); | |
1631 __ b(return_from_deopt_common); | |
1632 | |
1633 deopt_frame_manager_return_vtos = __ pc(); | |
1634 __ li(result_index, AbstractInterpreter::BasicType_as_index(T_VOID)); | |
1635 // Last one, fall-through to return_from_deopt_common. | |
1636 | |
1637 // Deopt return common. An index is present that lets us move any | |
1638 // possible result being return to the interpreter's stack. | |
1639 // | |
1640 __ BIND(return_from_deopt_common); | |
1641 | |
1642 } | |
1643 | |
1644 // Generate the code to handle a more_monitors message from the c++ interpreter. | |
1645 void CppInterpreterGenerator::generate_more_monitors() { | |
1646 | |
1647 // | |
1648 // Registers alive | |
1649 // R16_thread - JavaThread* | |
1650 // R15_prev_state - previous BytecodeInterpreter or 0 | |
1651 // R14_state - BytecodeInterpreter* address of receiver's interpreter state | |
1652 // R1_SP - old stack pointer | |
1653 // | |
1654 // Registers updated | |
1655 // R1_SP - new stack pointer | |
1656 // | |
1657 | |
1658 // Very-local scratch registers. | |
1659 const Register old_tos = R21_tmp1; | |
1660 const Register new_tos = R22_tmp2; | |
1661 const Register stack_base = R23_tmp3; | |
1662 const Register stack_limit = R24_tmp4; | |
1663 const Register slot = R25_tmp5; | |
1664 const Register n_slots = R25_tmp5; | |
1665 | |
1666 // Interpreter state fields. | |
1667 const Register msg = R24_tmp4; | |
1668 | |
1669 // Load up relevant interpreter state. | |
1670 | |
1671 __ ld(stack_base, state_(_stack_base)); // Old stack_base | |
1672 __ ld(old_tos, state_(_stack)); // Old tos | |
1673 __ ld(stack_limit, state_(_stack_limit)); // Old stack_limit | |
1674 | |
1675 // extracted monitor_size | |
1676 int monitor_size = frame::interpreter_frame_monitor_size_in_bytes(); | |
1677 assert(Assembler::is_aligned((unsigned int)monitor_size, | |
1678 (unsigned int)frame::alignment_in_bytes), | |
1679 "size of a monitor must respect alignment of SP"); | |
1680 | |
1681 // Save and restore top LR | |
1682 __ ld(R12_scratch2, _top_ijava_frame_abi(frame_manager_lr), R1_SP); | |
1683 __ resize_frame(-monitor_size, R11_scratch1);// Allocate space for new monitor | |
1684 __ std(R12_scratch2, _top_ijava_frame_abi(frame_manager_lr), R1_SP); | |
1685 // Initial_caller_sp is used as unextended_sp for non initial callers. | |
1686 __ std(R1_SP, _top_ijava_frame_abi(initial_caller_sp), R1_SP); | |
1687 __ addi(stack_base, stack_base, -monitor_size); // New stack_base | |
1688 __ addi(new_tos, old_tos, -monitor_size); // New tos | |
1689 __ addi(stack_limit, stack_limit, -monitor_size); // New stack_limit | |
1690 | |
1691 __ std(R1_SP, state_(_last_Java_sp)); // Update frame_bottom | |
1692 | |
1693 __ std(stack_base, state_(_stack_base)); // Update stack_base | |
1694 __ std(new_tos, state_(_stack)); // Update tos | |
1695 __ std(stack_limit, state_(_stack_limit)); // Update stack_limit | |
1696 | |
1697 __ li(msg, BytecodeInterpreter::got_monitors); // Tell interpreter we allocated the lock | |
1698 __ stw(msg, state_(_msg)); | |
1699 | |
1700 // Shuffle expression stack down. Recall that stack_base points | |
1701 // just above the new expression stack bottom. Old_tos and new_tos | |
1702 // are used to scan thru the old and new expression stacks. | |
1703 | |
1704 Label copy_slot, copy_slot_finished; | |
1705 __ sub(n_slots, stack_base, new_tos); | |
1706 __ srdi_(n_slots, n_slots, LogBytesPerWord); // compute number of slots to copy | |
1707 assert(LogBytesPerWord == 3, "conflicts assembler instructions"); | |
1708 __ beq(CCR0, copy_slot_finished); // nothing to copy | |
1709 | |
1710 __ mtctr(n_slots); | |
1711 | |
1712 // loop | |
1713 __ bind(copy_slot); | |
1714 __ ldu(slot, BytesPerWord, old_tos); // slot = *++old_tos; | |
1715 __ stdu(slot, BytesPerWord, new_tos); // *++new_tos = slot; | |
1716 __ bdnz(copy_slot); | |
1717 | |
1718 __ bind(copy_slot_finished); | |
1719 | |
1720 // Restart interpreter | |
1721 __ li(R0, 0); | |
1722 __ std(R0, BasicObjectLock::obj_offset_in_bytes(), stack_base); // Mark lock as unused | |
1723 } | |
1724 | |
1725 address CppInterpreterGenerator::generate_normal_entry(void) { | |
1726 if (interpreter_frame_manager != NULL) return interpreter_frame_manager; | |
1727 | |
1728 address entry = __ pc(); | |
1729 | |
1730 address return_from_native_pc = (address) NULL; | |
1731 | |
1732 // Initial entry to frame manager (from call_stub or c2i_adapter) | |
1733 | |
1734 // | |
1735 // Registers alive | |
1736 // R16_thread - JavaThread* | |
1737 // R19_method - callee's Method (method to be invoked) | |
1738 // R17_tos - address of sender tos (prepushed) | |
1739 // R1_SP - SP prepared by call stub such that caller's outgoing args are near top | |
1740 // LR - return address to caller (call_stub or c2i_adapter) | |
1741 // R21_sender_SP - initial caller sp | |
1742 // | |
1743 // Registers updated | |
1744 // R15_prev_state - 0 | |
1745 // | |
1746 // Stack layout at this point: | |
1747 // | |
1748 // 0 [TOP_IJAVA_FRAME_ABI] <-- R1_SP | |
1749 // alignment (optional) | |
1750 // [outgoing Java arguments] <-- R17_tos | |
1751 // ... | |
1752 // PARENT [PARENT_IJAVA_FRAME_ABI] | |
1753 // ... | |
1754 // | |
1755 | |
1756 // Save initial_caller_sp to caller's abi. | |
1757 // The caller frame must be resized before returning to get rid of | |
1758 // the c2i part on top of the calling compiled frame (if any). | |
1759 // R21_tmp1 must match sender_sp in gen_c2i_adapter. | |
1760 // Now override the saved SP with the senderSP so we can pop c2i | |
1761 // arguments (if any) off when we return. | |
1762 __ std(R21_sender_SP, _top_ijava_frame_abi(initial_caller_sp), R1_SP); | |
1763 | |
1764 // Save LR to caller's frame. We don't use _abi(lr) here, | |
1765 // because it is not safe. | |
1766 __ mflr(R0); | |
1767 __ std(R0, _top_ijava_frame_abi(frame_manager_lr), R1_SP); | |
1768 | |
1769 // If we come here, it is the first invocation of the frame manager. | |
1770 // So there is no previous interpreter state. | |
1771 __ li(R15_prev_state, 0); | |
1772 | |
1773 | |
1774 // Fall through to where "recursive" invocations go. | |
1775 | |
1776 //============================================================================= | |
1777 // Dispatch an instance of the interpreter. Recursive activations | |
1778 // come here. | |
1779 | |
1780 Label re_dispatch; | |
1781 __ BIND(re_dispatch); | |
1782 | |
1783 // | |
1784 // Registers alive | |
1785 // R16_thread - JavaThread* | |
1786 // R19_method - callee's Method | |
1787 // R17_tos - address of caller's tos (prepushed) | |
1788 // R15_prev_state - address of caller's BytecodeInterpreter or 0 | |
1789 // R1_SP - caller's SP trimmed such that caller's outgoing args are near top. | |
1790 // | |
1791 // Stack layout at this point: | |
1792 // | |
1793 // 0 [TOP_IJAVA_FRAME_ABI] | |
1794 // alignment (optional) | |
1795 // [outgoing Java arguments] | |
1796 // ... | |
1797 // PARENT [PARENT_IJAVA_FRAME_ABI] | |
1798 // ... | |
1799 | |
1800 // fall through to interpreted execution | |
1801 | |
1802 //============================================================================= | |
1803 // Allocate a new Java frame and initialize the new interpreter state. | |
1804 | |
1805 Label stack_overflow_return; | |
1806 | |
1807 // Create a suitable new Java frame plus a new BytecodeInterpreter instance | |
1808 // in the current (frame manager's) C frame. | |
1809 generate_compute_interpreter_state(stack_overflow_return); | |
1810 | |
1811 // fall through | |
1812 | |
1813 //============================================================================= | |
1814 // Interpreter dispatch. | |
1815 | |
1816 Label call_interpreter; | |
1817 __ BIND(call_interpreter); | |
1818 | |
1819 // | |
1820 // Registers alive | |
1821 // R16_thread - JavaThread* | |
1822 // R15_prev_state - previous BytecodeInterpreter or 0 | |
1823 // R14_state - address of receiver's BytecodeInterpreter | |
1824 // R1_SP - receiver's stack pointer | |
1825 // | |
1826 | |
1827 // Thread fields. | |
1828 const Register pending_exception = R21_tmp1; | |
1829 | |
1830 // Interpreter state fields. | |
1831 const Register msg = R24_tmp4; | |
1832 | |
1833 // MethodOop fields. | |
1834 const Register parameter_count = R25_tmp5; | |
1835 const Register result_index = R26_tmp6; | |
1836 | |
1837 const Register dummy = R28_tmp8; | |
1838 | |
1839 // Address of various interpreter stubs. | |
1840 // R29_tmp9 is reserved. | |
1841 const Register stub_addr = R27_tmp7; | |
1842 | |
1843 // Uncommon trap needs to jump to here to enter the interpreter | |
1844 // (re-execute current bytecode). | |
1845 unctrap_frame_manager_entry = __ pc(); | |
1846 | |
1847 // If we are profiling, store our fp (BSP) in the thread so we can | |
1848 // find it during a tick. | |
1849 if (Arguments::has_profile()) { | |
1850 // On PPC64 we store the pointer to the current BytecodeInterpreter, | |
1851 // instead of the bsp of ia64. This should suffice to be able to | |
1852 // find all interesting information. | |
1853 __ std(R14_state, thread_(last_interpreter_fp)); | |
1854 } | |
1855 | |
1856 // R16_thread, R14_state and R15_prev_state are nonvolatile | |
1857 // registers. There is no need to save these. If we needed to save | |
1858 // some state in the current Java frame, this could be a place to do | |
1859 // so. | |
1860 | |
1861 // Call Java bytecode dispatcher passing "BytecodeInterpreter* istate". | |
1862 __ call_VM_leaf(CAST_FROM_FN_PTR(address, | |
1863 JvmtiExport::can_post_interpreter_events() | |
1864 ? BytecodeInterpreter::runWithChecks | |
1865 : BytecodeInterpreter::run), | |
1866 R14_state); | |
1867 | |
1868 interpreter_return_address = __ last_calls_return_pc(); | |
1869 | |
1870 // R16_thread, R14_state and R15_prev_state have their values preserved. | |
1871 | |
1872 // If we are profiling, clear the fp in the thread to tell | |
1873 // the profiler that we are no longer in the interpreter. | |
1874 if (Arguments::has_profile()) { | |
1875 __ li(R11_scratch1, 0); | |
1876 __ std(R11_scratch1, thread_(last_interpreter_fp)); | |
1877 } | |
1878 | |
1879 // Load message from bytecode dispatcher. | |
1880 // TODO: PPC port: guarantee(4 == BytecodeInterpreter::sz_msg(), "unexpected field size"); | |
1881 __ lwz(msg, state_(_msg)); | |
1882 | |
1883 | |
1884 Label more_monitors; | |
1885 Label return_from_native; | |
1886 Label return_from_native_common; | |
1887 Label return_from_native_no_exception; | |
1888 Label return_from_interpreted_method; | |
1889 Label return_from_recursive_activation; | |
1890 Label unwind_recursive_activation; | |
1891 Label resume_interpreter; | |
1892 Label return_to_initial_caller; | |
1893 Label unwind_initial_activation; | |
1894 Label unwind_initial_activation_pending_exception; | |
1895 Label call_method; | |
1896 Label call_special; | |
1897 Label retry_method; | |
1898 Label retry_method_osr; | |
1899 Label popping_frame; | |
1900 Label throwing_exception; | |
1901 | |
1902 // Branch according to the received message | |
1903 | |
1904 __ cmpwi(CCR1, msg, BytecodeInterpreter::call_method); | |
1905 __ cmpwi(CCR2, msg, BytecodeInterpreter::return_from_method); | |
1906 | |
1907 __ beq(CCR1, call_method); | |
1908 __ beq(CCR2, return_from_interpreted_method); | |
1909 | |
1910 __ cmpwi(CCR3, msg, BytecodeInterpreter::more_monitors); | |
1911 __ cmpwi(CCR4, msg, BytecodeInterpreter::throwing_exception); | |
1912 | |
1913 __ beq(CCR3, more_monitors); | |
1914 __ beq(CCR4, throwing_exception); | |
1915 | |
1916 __ cmpwi(CCR5, msg, BytecodeInterpreter::popping_frame); | |
1917 __ cmpwi(CCR6, msg, BytecodeInterpreter::do_osr); | |
1918 | |
1919 __ beq(CCR5, popping_frame); | |
1920 __ beq(CCR6, retry_method_osr); | |
1921 | |
1922 __ stop("bad message from interpreter"); | |
1923 | |
1924 | |
1925 //============================================================================= | |
1926 // Add a monitor just below the existing one(s). State->_stack_base | |
1927 // points to the lowest existing one, so we insert the new one just | |
1928 // below it and shuffle the expression stack down. Ref. the above | |
1929 // stack layout picture, we must update _stack_base, _stack, _stack_limit | |
1930 // and _last_Java_sp in the interpreter state. | |
1931 | |
1932 __ BIND(more_monitors); | |
1933 | |
1934 generate_more_monitors(); | |
1935 __ b(call_interpreter); | |
1936 | |
1937 generate_deopt_handling(result_index); | |
1938 | |
1939 // Restoring the R14_state is already done by the deopt_blob. | |
1940 | |
1941 // Current tos includes no parameter slots. | |
1942 __ ld(R17_tos, state_(_stack)); | |
1943 __ li(msg, BytecodeInterpreter::deopt_resume); | |
1944 __ b(return_from_native_common); | |
1945 | |
1946 // We are sent here when we are unwinding from a native method or | |
1947 // adapter with an exception pending. We need to notify the interpreter | |
1948 // that there is an exception to process. | |
1949 // We arrive here also if the frame manager called an (interpreted) target | |
1950 // which returns with a StackOverflow exception. | |
1951 // The control flow is in this case is: | |
1952 // frame_manager->throw_excp_stub->forward_excp->rethrow_excp_entry | |
1953 | |
1954 AbstractInterpreter::_rethrow_exception_entry = __ pc(); | |
1955 | |
1956 // Restore R14_state. | |
1957 __ ld(R14_state, 0, R1_SP); | |
1958 __ addi(R14_state, R14_state, | |
1959 -frame::interpreter_frame_cinterpreterstate_size_in_bytes()); | |
1960 | |
1961 // Store exception oop into thread object. | |
1962 __ std(R3_RET, thread_(pending_exception)); | |
1963 __ li(msg, BytecodeInterpreter::method_resume /*rethrow_exception*/); | |
1964 // | |
1965 // NOTE: the interpreter frame as setup be deopt does NOT include | |
1966 // any parameter slots (good thing since we have no callee here | |
1967 // and couldn't remove them) so we don't have to do any calculations | |
1968 // here to figure it out. | |
1969 // | |
1970 __ ld(R17_tos, state_(_stack)); | |
1971 __ b(return_from_native_common); | |
1972 | |
1973 | |
1974 //============================================================================= | |
1975 // Returning from a native method. Result is in the native abi | |
1976 // location so we must move it to the java expression stack. | |
1977 | |
1978 __ BIND(return_from_native); | |
1979 guarantee(return_from_native_pc == (address) NULL, "precondition"); | |
1980 return_from_native_pc = __ pc(); | |
1981 | |
1982 // Restore R14_state. | |
1983 __ ld(R14_state, 0, R1_SP); | |
1984 __ addi(R14_state, R14_state, | |
1985 -frame::interpreter_frame_cinterpreterstate_size_in_bytes()); | |
1986 | |
1987 // | |
1988 // Registers alive | |
1989 // R16_thread | |
1990 // R14_state - address of caller's BytecodeInterpreter. | |
1991 // R3_RET - integer result, if any. | |
1992 // F1_RET - float result, if any. | |
1993 // | |
1994 // Registers updated | |
1995 // R19_method - callee's Method | |
1996 // R17_tos - caller's tos, with outgoing args popped | |
1997 // result_index - index of result handler. | |
1998 // msg - message for resuming interpreter. | |
1999 // | |
2000 | |
2001 // Very-local scratch registers. | |
2002 | |
2003 const ConditionRegister have_pending_exception = CCR0; | |
2004 | |
2005 // Load callee Method, gc may have moved it. | |
2006 __ ld(R19_method, state_(_result._to_call._callee)); | |
2007 | |
2008 // Load address of caller's tos. includes parameter slots. | |
2009 __ ld(R17_tos, state_(_stack)); | |
2010 | |
2011 // Pop callee's parameters. | |
2012 | |
2013 __ ld(parameter_count, in_bytes(Method::const_offset()), R19_method); | |
2014 __ lhz(parameter_count, in_bytes(ConstMethod::size_of_parameters_offset()), parameter_count); | |
2015 __ sldi(parameter_count, parameter_count, Interpreter::logStackElementSize); | |
2016 __ add(R17_tos, R17_tos, parameter_count); | |
2017 | |
2018 // Result stub address array index | |
2019 // TODO: PPC port: assert(4 == methodOopDesc::sz_result_index(), "unexpected field size"); | |
2020 __ lwa(result_index, method_(result_index)); | |
2021 | |
2022 __ li(msg, BytecodeInterpreter::method_resume); | |
2023 | |
2024 // | |
2025 // Registers alive | |
2026 // R16_thread | |
2027 // R14_state - address of caller's BytecodeInterpreter. | |
2028 // R17_tos - address of caller's tos with outgoing args already popped | |
2029 // R3_RET - integer return value, if any. | |
2030 // F1_RET - float return value, if any. | |
2031 // result_index - index of result handler. | |
2032 // msg - message for resuming interpreter. | |
2033 // | |
2034 // Registers updated | |
2035 // R3_RET - new address of caller's tos, including result, if any | |
2036 // | |
2037 | |
2038 __ BIND(return_from_native_common); | |
2039 | |
2040 // Check for pending exception | |
2041 __ ld(pending_exception, thread_(pending_exception)); | |
2042 __ cmpdi(CCR0, pending_exception, 0); | |
2043 __ beq(CCR0, return_from_native_no_exception); | |
2044 | |
2045 // If there's a pending exception, we really have no result, so | |
2046 // R3_RET is dead. Resume_interpreter assumes the new tos is in | |
2047 // R3_RET. | |
2048 __ mr(R3_RET, R17_tos); | |
2049 // `resume_interpreter' expects R15_prev_state to be alive. | |
2050 __ ld(R15_prev_state, state_(_prev_link)); | |
2051 __ b(resume_interpreter); | |
2052 | |
2053 __ BIND(return_from_native_no_exception); | |
2054 | |
2055 // No pending exception, copy method result from native ABI register | |
2056 // to tos. | |
2057 | |
2058 // Address of stub descriptor address array. | |
2059 __ load_const(stub_addr, CppInterpreter::tosca_result_to_stack()); | |
2060 | |
2061 // Pass address of tos to stub. | |
2062 __ mr(R4_ARG2, R17_tos); | |
2063 | |
2064 // Address of stub descriptor address. | |
2065 __ sldi(result_index, result_index, LogBytesPerWord); | |
2066 __ add(stub_addr, stub_addr, result_index); | |
2067 | |
2068 // Stub descriptor address. | |
2069 __ ld(stub_addr, 0, stub_addr); | |
2070 | |
2071 // TODO: don't do this via a call, do it in place! | |
2072 // | |
2073 // call stub via descriptor | |
2074 // in R3_ARG1/F1_ARG1: result value (R3_RET or F1_RET) | |
2075 __ call_stub(stub_addr); | |
2076 | |
2077 // new tos = result of call in R3_RET | |
2078 | |
2079 // `resume_interpreter' expects R15_prev_state to be alive. | |
2080 __ ld(R15_prev_state, state_(_prev_link)); | |
2081 __ b(resume_interpreter); | |
2082 | |
2083 //============================================================================= | |
2084 // We encountered an exception while computing the interpreter | |
2085 // state, so R14_state isn't valid. Act as if we just returned from | |
2086 // the callee method with a pending exception. | |
2087 __ BIND(stack_overflow_return); | |
2088 | |
2089 // | |
2090 // Registers alive | |
2091 // R16_thread - JavaThread* | |
2092 // R1_SP - old stack pointer | |
2093 // R19_method - callee's Method | |
2094 // R17_tos - address of caller's tos (prepushed) | |
2095 // R15_prev_state - address of caller's BytecodeInterpreter or 0 | |
2096 // R18_locals - address of callee's locals array | |
2097 // | |
2098 // Registers updated | |
2099 // R3_RET - address of resuming tos, if recursive unwind | |
2100 | |
2101 Label Lskip_unextend_SP; | |
2102 | |
2103 { | |
2104 const ConditionRegister is_initial_call = CCR0; | |
2105 const Register tos_save = R21_tmp1; | |
2106 const Register tmp = R22_tmp2; | |
2107 | |
2108 assert(tos_save->is_nonvolatile(), "need a nonvolatile"); | |
2109 | |
2110 // Is the exception thrown in the initial Java frame of this frame | |
2111 // manager frame? | |
2112 __ cmpdi(is_initial_call, R15_prev_state, 0); | |
2113 __ bne(is_initial_call, Lskip_unextend_SP); | |
2114 | |
2115 // Pop any c2i extension from the stack. This is necessary in the | |
2116 // non-recursive case (that is we were called by the c2i adapter, | |
2117 // meaning we have to prev state). In this case we entered the frame | |
2118 // manager through a special entry which pushes the orignal | |
2119 // unextended SP to the stack. Here we load it back. | |
2120 __ ld(R0, _top_ijava_frame_abi(frame_manager_lr), R1_SP); | |
2121 __ mtlr(R0); | |
2122 // Resize frame to get rid of a potential extension. | |
2123 __ resize_frame_to_initial_caller(R11_scratch1, R12_scratch2); | |
2124 | |
2125 // Fall through | |
2126 | |
2127 __ bind(Lskip_unextend_SP); | |
2128 | |
2129 // Throw the exception via RuntimeStub "throw_StackOverflowError_entry". | |
2130 // | |
2131 // Previously, we called C-Code directly. As a consequence, a | |
2132 // possible GC tried to process the argument oops of the top frame | |
2133 // (see RegisterMap::clear, which sets the corresponding flag to | |
2134 // true). This lead to crashes because: | |
2135 // 1. The top register map did not contain locations for the argument registers | |
2136 // 2. The arguments are dead anyway, could be already overwritten in the worst case | |
2137 // Solution: Call via special runtime stub that pushes it's own frame. This runtime stub has the flag | |
2138 // "CodeBlob::caller_must_gc_arguments()" set to "false", what prevents the dead arguments getting GC'd. | |
2139 // | |
2140 // 2 cases exist: | |
2141 // 1. We were called by the c2i adapter / call stub | |
2142 // 2. We were called by the frame manager | |
2143 // | |
2144 // Both cases are handled by this code: | |
2145 // 1. - initial_caller_sp was saved on stack => Load it back and we're ok | |
2146 // - control flow will be: | |
2147 // throw_stackoverflow_stub->VM->throw_stackoverflow_stub->forward_excep->excp_blob of calling method | |
2148 // 2. - control flow will be: | |
2149 // throw_stackoverflow_stub->VM->throw_stackoverflow_stub->forward_excep-> | |
2150 // ->rethrow_excp_entry of frame manager->resume_method | |
2151 // Since we restored the caller SP above, the rethrow_excp_entry can restore the original interpreter state | |
2152 // registers using the stack and resume the calling method with a pending excp. | |
2153 | |
2154 __ load_const(R3_ARG1, (StubRoutines::throw_StackOverflowError_entry())); | |
2155 __ mtctr(R3_ARG1); | |
2156 __ bctr(); | |
2157 } | |
2158 //============================================================================= | |
2159 // We have popped a frame from an interpreted call. We are assured | |
2160 // of returning to an interpreted call by the popframe abi. We have | |
2161 // no return value all we have to do is pop the current frame and | |
2162 // then make sure that the top of stack (of the caller) gets set to | |
2163 // where it was when we entered the callee (i.e. the args are still | |
2164 // in place). Or we are returning to the interpreter. In the first | |
2165 // case we must extract result (if any) from the java expression | |
2166 // stack and store it in the location the native abi would expect | |
2167 // for a call returning this type. In the second case we must simply | |
2168 // do a stack to stack move as we unwind. | |
2169 | |
2170 __ BIND(popping_frame); | |
2171 | |
2172 // Registers alive | |
2173 // R14_state | |
2174 // R15_prev_state | |
2175 // R17_tos | |
2176 // | |
2177 // Registers updated | |
2178 // R19_method | |
2179 // R3_RET | |
2180 // msg | |
2181 { | |
2182 Label L; | |
2183 | |
2184 // Reload callee method, gc may have moved it. | |
2185 __ ld(R19_method, state_(_method)); | |
2186 | |
2187 // We may be returning to a deoptimized frame in which case the | |
2188 // usual assumption of a recursive return is not true. | |
2189 | |
2190 // not equal = is recursive call | |
2191 __ cmpdi(CCR0, R15_prev_state, 0); | |
2192 | |
2193 __ bne(CCR0, L); | |
2194 | |
2195 // Pop_frame capability. | |
2196 // The pop_frame api says that the underlying frame is a Java frame, in this case | |
2197 // (prev_state==null) it must be a compiled frame: | |
2198 // | |
2199 // Stack at this point: I, C2I + C, ... | |
2200 // | |
2201 // The outgoing arguments of the call have just been copied (popframe_preserve_args). | |
2202 // By the pop_frame api, we must end up in an interpreted frame. So the compiled frame | |
2203 // will be deoptimized. Deoptimization will restore the outgoing arguments from | |
2204 // popframe_preserve_args, adjust the tos such that it includes the popframe_preserve_args, | |
2205 // and adjust the bci such that the call will be executed again. | |
2206 // We have no results, just pop the interpreter frame, resize the compiled frame to get rid | |
2207 // of the c2i extension and return to the deopt_handler. | |
2208 __ b(unwind_initial_activation); | |
2209 | |
2210 // is recursive call | |
2211 __ bind(L); | |
2212 | |
2213 // Resume_interpreter expects the original tos in R3_RET. | |
2214 __ ld(R3_RET, prev_state_(_stack)); | |
2215 | |
2216 // We're done. | |
2217 __ li(msg, BytecodeInterpreter::popping_frame); | |
2218 | |
2219 __ b(unwind_recursive_activation); | |
2220 } | |
2221 | |
2222 | |
2223 //============================================================================= | |
2224 | |
2225 // We have finished an interpreted call. We are either returning to | |
2226 // native (call_stub/c2) or we are returning to the interpreter. | |
2227 // When returning to native, we must extract the result (if any) | |
2228 // from the java expression stack and store it in the location the | |
2229 // native abi expects. When returning to the interpreter we must | |
2230 // simply do a stack to stack move as we unwind. | |
2231 | |
2232 __ BIND(return_from_interpreted_method); | |
2233 | |
2234 // | |
2235 // Registers alive | |
2236 // R16_thread - JavaThread* | |
2237 // R15_prev_state - address of caller's BytecodeInterpreter or 0 | |
2238 // R14_state - address of callee's interpreter state | |
2239 // R1_SP - callee's stack pointer | |
2240 // | |
2241 // Registers updated | |
2242 // R19_method - callee's method | |
2243 // R3_RET - address of result (new caller's tos), | |
2244 // | |
2245 // if returning to interpreted | |
2246 // msg - message for interpreter, | |
2247 // if returning to interpreted | |
2248 // | |
2249 | |
2250 // Check if this is the initial invocation of the frame manager. | |
2251 // If so, R15_prev_state will be null. | |
2252 __ cmpdi(CCR0, R15_prev_state, 0); | |
2253 | |
2254 // Reload callee method, gc may have moved it. | |
2255 __ ld(R19_method, state_(_method)); | |
2256 | |
2257 // Load the method's result type. | |
2258 __ lwz(result_index, method_(result_index)); | |
2259 | |
2260 // Go to return_to_initial_caller if R15_prev_state is null. | |
2261 __ beq(CCR0, return_to_initial_caller); | |
2262 | |
2263 // Copy callee's result to caller's expression stack via inline stack-to-stack | |
2264 // converters. | |
2265 { | |
2266 Register new_tos = R3_RET; | |
2267 Register from_temp = R4_ARG2; | |
2268 Register from = R5_ARG3; | |
2269 Register tos = R6_ARG4; | |
2270 Register tmp1 = R7_ARG5; | |
2271 Register tmp2 = R8_ARG6; | |
2272 | |
2273 ConditionRegister result_type_is_void = CCR1; | |
2274 ConditionRegister result_type_is_long = CCR2; | |
2275 ConditionRegister result_type_is_double = CCR3; | |
2276 | |
2277 Label stack_to_stack_void; | |
2278 Label stack_to_stack_double_slot; // T_LONG, T_DOUBLE | |
2279 Label stack_to_stack_single_slot; // T_BOOLEAN, T_BYTE, T_CHAR, T_SHORT, T_INT, T_FLOAT, T_OBJECT | |
2280 Label stack_to_stack_done; | |
2281 | |
2282 // Pass callee's address of tos + BytesPerWord | |
2283 __ ld(from_temp, state_(_stack)); | |
2284 | |
2285 // result type: void | |
2286 __ cmpwi(result_type_is_void, result_index, AbstractInterpreter::BasicType_as_index(T_VOID)); | |
2287 | |
2288 // Pass caller's tos == callee's locals address | |
2289 __ ld(tos, state_(_locals)); | |
2290 | |
2291 // result type: long | |
2292 __ cmpwi(result_type_is_long, result_index, AbstractInterpreter::BasicType_as_index(T_LONG)); | |
2293 | |
2294 __ addi(from, from_temp, Interpreter::stackElementSize); | |
2295 | |
2296 // !! don't branch above this line !! | |
2297 | |
2298 // handle void | |
2299 __ beq(result_type_is_void, stack_to_stack_void); | |
2300 | |
2301 // result type: double | |
2302 __ cmpwi(result_type_is_double, result_index, AbstractInterpreter::BasicType_as_index(T_DOUBLE)); | |
2303 | |
2304 // handle long or double | |
2305 __ beq(result_type_is_long, stack_to_stack_double_slot); | |
2306 __ beq(result_type_is_double, stack_to_stack_double_slot); | |
2307 | |
2308 // fall through to single slot types (incl. object) | |
2309 | |
2310 { | |
2311 __ BIND(stack_to_stack_single_slot); | |
2312 // T_BOOLEAN, T_BYTE, T_CHAR, T_SHORT, T_INT, T_FLOAT, T_OBJECT | |
2313 | |
2314 __ ld(tmp1, 0, from); | |
2315 __ std(tmp1, 0, tos); | |
2316 // New expression stack top | |
2317 __ addi(new_tos, tos, - BytesPerWord); | |
2318 | |
2319 __ b(stack_to_stack_done); | |
2320 } | |
2321 | |
2322 { | |
2323 __ BIND(stack_to_stack_double_slot); | |
2324 // T_LONG, T_DOUBLE | |
2325 | |
2326 // Move both entries for debug purposes even though only one is live | |
2327 __ ld(tmp1, BytesPerWord, from); | |
2328 __ ld(tmp2, 0, from); | |
2329 __ std(tmp1, 0, tos); | |
2330 __ std(tmp2, -BytesPerWord, tos); | |
2331 | |
2332 // new expression stack top | |
2333 __ addi(new_tos, tos, - 2 * BytesPerWord); // two slots | |
2334 __ b(stack_to_stack_done); | |
2335 } | |
2336 | |
2337 { | |
2338 __ BIND(stack_to_stack_void); | |
2339 // T_VOID | |
2340 | |
2341 // new expression stack top | |
2342 __ mr(new_tos, tos); | |
2343 // fall through to stack_to_stack_done | |
2344 } | |
2345 | |
2346 __ BIND(stack_to_stack_done); | |
2347 } | |
2348 | |
2349 // new tos = R3_RET | |
2350 | |
2351 // Get the message for the interpreter | |
2352 __ li(msg, BytecodeInterpreter::method_resume); | |
2353 | |
2354 // And fall thru | |
2355 | |
2356 | |
2357 //============================================================================= | |
2358 // Restore caller's interpreter state and pass pointer to caller's | |
2359 // new tos to caller. | |
2360 | |
2361 __ BIND(unwind_recursive_activation); | |
2362 | |
2363 // | |
2364 // Registers alive | |
2365 // R15_prev_state - address of caller's BytecodeInterpreter | |
2366 // R3_RET - address of caller's tos | |
2367 // msg - message for caller's BytecodeInterpreter | |
2368 // R1_SP - callee's stack pointer | |
2369 // | |
2370 // Registers updated | |
2371 // R14_state - address of caller's BytecodeInterpreter | |
2372 // R15_prev_state - address of its parent or 0 | |
2373 // | |
2374 | |
2375 // Pop callee's interpreter and set R14_state to caller's interpreter. | |
2376 __ pop_interpreter_state(/*prev_state_may_be_0=*/false); | |
2377 | |
2378 // And fall thru | |
2379 | |
2380 | |
2381 //============================================================================= | |
2382 // Resume the (calling) interpreter after a call. | |
2383 | |
2384 __ BIND(resume_interpreter); | |
2385 | |
2386 // | |
2387 // Registers alive | |
2388 // R14_state - address of resuming BytecodeInterpreter | |
2389 // R15_prev_state - address of its parent or 0 | |
2390 // R3_RET - address of resuming tos | |
2391 // msg - message for resuming interpreter | |
2392 // R1_SP - callee's stack pointer | |
2393 // | |
2394 // Registers updated | |
2395 // R1_SP - caller's stack pointer | |
2396 // | |
2397 | |
2398 // Restore C stack pointer of caller (resuming interpreter), | |
2399 // R14_state already points to the resuming BytecodeInterpreter. | |
2400 __ pop_interpreter_frame_to_state(R14_state, R21_tmp1, R11_scratch1, R12_scratch2); | |
2401 | |
2402 // Store new address of tos (holding return value) in interpreter state. | |
2403 __ std(R3_RET, state_(_stack)); | |
2404 | |
2405 // Store message for interpreter. | |
2406 __ stw(msg, state_(_msg)); | |
2407 | |
2408 __ b(call_interpreter); | |
2409 | |
2410 //============================================================================= | |
2411 // Interpreter returning to native code (call_stub/c1/c2) from | |
2412 // initial activation. Convert stack result and unwind activation. | |
2413 | |
2414 __ BIND(return_to_initial_caller); | |
2415 | |
2416 // | |
2417 // Registers alive | |
2418 // R19_method - callee's Method | |
2419 // R14_state - address of callee's interpreter state | |
2420 // R16_thread - JavaThread | |
2421 // R1_SP - callee's stack pointer | |
2422 // | |
2423 // Registers updated | |
2424 // R3_RET/F1_RET - result in expected output register | |
2425 // | |
2426 | |
2427 // If we have an exception pending we have no result and we | |
2428 // must figure out where to really return to. | |
2429 // | |
2430 __ ld(pending_exception, thread_(pending_exception)); | |
2431 __ cmpdi(CCR0, pending_exception, 0); | |
2432 __ bne(CCR0, unwind_initial_activation_pending_exception); | |
2433 | |
2434 __ lwa(result_index, method_(result_index)); | |
2435 | |
2436 // Address of stub descriptor address array. | |
2437 __ load_const(stub_addr, CppInterpreter::stack_result_to_native()); | |
2438 | |
2439 // Pass address of callee's tos + BytesPerWord. | |
2440 // Will then point directly to result. | |
2441 __ ld(R3_ARG1, state_(_stack)); | |
2442 __ addi(R3_ARG1, R3_ARG1, Interpreter::stackElementSize); | |
2443 | |
2444 // Address of stub descriptor address | |
2445 __ sldi(result_index, result_index, LogBytesPerWord); | |
2446 __ add(stub_addr, stub_addr, result_index); | |
2447 | |
2448 // Stub descriptor address | |
2449 __ ld(stub_addr, 0, stub_addr); | |
2450 | |
2451 // TODO: don't do this via a call, do it in place! | |
2452 // | |
2453 // call stub via descriptor | |
2454 __ call_stub(stub_addr); | |
2455 | |
2456 __ BIND(unwind_initial_activation); | |
2457 | |
2458 // Unwind from initial activation. No exception is pending. | |
2459 | |
2460 // | |
2461 // Stack layout at this point: | |
2462 // | |
2463 // 0 [TOP_IJAVA_FRAME_ABI] <-- R1_SP | |
2464 // ... | |
2465 // CALLER [PARENT_IJAVA_FRAME_ABI] | |
2466 // ... | |
2467 // CALLER [unextended ABI] | |
2468 // ... | |
2469 // | |
2470 // The CALLER frame has a C2I adapter or is an entry-frame. | |
2471 // | |
2472 | |
2473 // An interpreter frame exists, we may pop the TOP_IJAVA_FRAME and | |
2474 // turn the caller's PARENT_IJAVA_FRAME back into a TOP_IJAVA_FRAME. | |
2475 // But, we simply restore the return pc from the caller's frame and | |
2476 // use the caller's initial_caller_sp as the new SP which pops the | |
2477 // interpreter frame and "resizes" the caller's frame to its "unextended" | |
2478 // size. | |
2479 | |
2480 // get rid of top frame | |
2481 __ pop_frame(); | |
2482 | |
2483 // Load return PC from parent frame. | |
2484 __ ld(R21_tmp1, _parent_ijava_frame_abi(lr), R1_SP); | |
2485 | |
2486 // Resize frame to get rid of a potential extension. | |
2487 __ resize_frame_to_initial_caller(R11_scratch1, R12_scratch2); | |
2488 | |
2489 // update LR | |
2490 __ mtlr(R21_tmp1); | |
2491 | |
2492 // return | |
2493 __ blr(); | |
2494 | |
2495 //============================================================================= | |
2496 // Unwind from initial activation. An exception is pending | |
2497 | |
2498 __ BIND(unwind_initial_activation_pending_exception); | |
2499 | |
2500 // | |
2501 // Stack layout at this point: | |
2502 // | |
2503 // 0 [TOP_IJAVA_FRAME_ABI] <-- R1_SP | |
2504 // ... | |
2505 // CALLER [PARENT_IJAVA_FRAME_ABI] | |
2506 // ... | |
2507 // CALLER [unextended ABI] | |
2508 // ... | |
2509 // | |
2510 // The CALLER frame has a C2I adapter or is an entry-frame. | |
2511 // | |
2512 | |
2513 // An interpreter frame exists, we may pop the TOP_IJAVA_FRAME and | |
2514 // turn the caller's PARENT_IJAVA_FRAME back into a TOP_IJAVA_FRAME. | |
2515 // But, we just pop the current TOP_IJAVA_FRAME and fall through | |
2516 | |
2517 __ pop_frame(); | |
2518 __ ld(R3_ARG1, _top_ijava_frame_abi(lr), R1_SP); | |
2519 | |
2520 // | |
2521 // Stack layout at this point: | |
2522 // | |
2523 // CALLER [PARENT_IJAVA_FRAME_ABI] <-- R1_SP | |
2524 // ... | |
2525 // CALLER [unextended ABI] | |
2526 // ... | |
2527 // | |
2528 // The CALLER frame has a C2I adapter or is an entry-frame. | |
2529 // | |
2530 // Registers alive | |
2531 // R16_thread | |
2532 // R3_ARG1 - return address to caller | |
2533 // | |
2534 // Registers updated | |
2535 // R3_ARG1 - address of pending exception | |
2536 // R4_ARG2 - issuing pc = return address to caller | |
2537 // LR - address of exception handler stub | |
2538 // | |
2539 | |
2540 // Resize frame to get rid of a potential extension. | |
2541 __ resize_frame_to_initial_caller(R11_scratch1, R12_scratch2); | |
2542 | |
2543 __ mr(R14, R3_ARG1); // R14 := ARG1 | |
2544 __ mr(R4_ARG2, R3_ARG1); // ARG2 := ARG1 | |
2545 | |
2546 // Find the address of the "catch_exception" stub. | |
2547 __ push_frame_abi112(0, R11_scratch1); | |
2548 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), | |
2549 R16_thread, | |
2550 R4_ARG2); | |
2551 __ pop_frame(); | |
2552 | |
2553 // Load continuation address into LR. | |
2554 __ mtlr(R3_RET); | |
2555 | |
2556 // Load address of pending exception and clear it in thread object. | |
2557 __ ld(R3_ARG1/*R3_RET*/, thread_(pending_exception)); | |
2558 __ li(R4_ARG2, 0); | |
2559 __ std(R4_ARG2, thread_(pending_exception)); | |
2560 | |
2561 // re-load issuing pc | |
2562 __ mr(R4_ARG2, R14); | |
2563 | |
2564 // Branch to found exception handler. | |
2565 __ blr(); | |
2566 | |
2567 //============================================================================= | |
2568 // Call a new method. Compute new args and trim the expression stack | |
2569 // to only what we are currently using and then recurse. | |
2570 | |
2571 __ BIND(call_method); | |
2572 | |
2573 // | |
2574 // Registers alive | |
2575 // R16_thread | |
2576 // R14_state - address of caller's BytecodeInterpreter | |
2577 // R1_SP - caller's stack pointer | |
2578 // | |
2579 // Registers updated | |
2580 // R15_prev_state - address of caller's BytecodeInterpreter | |
2581 // R17_tos - address of caller's tos | |
2582 // R19_method - callee's Method | |
2583 // R1_SP - trimmed back | |
2584 // | |
2585 | |
2586 // Very-local scratch registers. | |
2587 | |
2588 const Register offset = R21_tmp1; | |
2589 const Register tmp = R22_tmp2; | |
2590 const Register self_entry = R23_tmp3; | |
2591 const Register stub_entry = R24_tmp4; | |
2592 | |
2593 const ConditionRegister cr = CCR0; | |
2594 | |
2595 // Load the address of the frame manager. | |
2596 __ load_const(self_entry, &interpreter_frame_manager); | |
2597 __ ld(self_entry, 0, self_entry); | |
2598 | |
2599 // Load BytecodeInterpreter._result._to_call._callee (callee's Method). | |
2600 __ ld(R19_method, state_(_result._to_call._callee)); | |
2601 // Load BytecodeInterpreter._stack (outgoing tos). | |
2602 __ ld(R17_tos, state_(_stack)); | |
2603 | |
2604 // Save address of caller's BytecodeInterpreter. | |
2605 __ mr(R15_prev_state, R14_state); | |
2606 | |
2607 // Load the callee's entry point. | |
2608 // Load BytecodeInterpreter._result._to_call._callee_entry_point. | |
2609 __ ld(stub_entry, state_(_result._to_call._callee_entry_point)); | |
2610 | |
2611 // Check whether stub_entry is equal to self_entry. | |
2612 __ cmpd(cr, self_entry, stub_entry); | |
2613 // if (self_entry == stub_entry) | |
2614 // do a re-dispatch | |
2615 __ beq(cr, re_dispatch); | |
2616 // else | |
2617 // call the specialized entry (adapter for jni or compiled code) | |
2618 __ BIND(call_special); | |
2619 | |
2620 // | |
2621 // Call the entry generated by `InterpreterGenerator::generate_native_entry'. | |
2622 // | |
2623 // Registers alive | |
2624 // R16_thread | |
2625 // R15_prev_state - address of caller's BytecodeInterpreter | |
2626 // R19_method - callee's Method | |
2627 // R17_tos - address of caller's tos | |
2628 // R1_SP - caller's stack pointer | |
2629 // | |
2630 | |
2631 // Mark return from specialized entry for generate_native_entry. | |
2632 guarantee(return_from_native_pc != (address) NULL, "precondition"); | |
2633 frame_manager_specialized_return = return_from_native_pc; | |
2634 | |
2635 // Set sender_SP in case we call interpreter native wrapper which | |
2636 // will expect it. Compiled code should not care. | |
2637 __ mr(R21_sender_SP, R1_SP); | |
2638 | |
2639 // Do a tail call here, and let the link register point to | |
2640 // frame_manager_specialized_return which is return_from_native_pc. | |
2641 __ load_const(tmp, frame_manager_specialized_return); | |
2642 __ call_stub_and_return_to(stub_entry, tmp /* return_pc=tmp */); | |
2643 | |
2644 | |
2645 //============================================================================= | |
2646 // | |
2647 // InterpretMethod triggered OSR compilation of some Java method M | |
2648 // and now asks to run the compiled code. We call this code the | |
2649 // `callee'. | |
2650 // | |
2651 // This is our current idea on how OSR should look like on PPC64: | |
2652 // | |
2653 // While interpreting a Java method M the stack is: | |
2654 // | |
2655 // (InterpretMethod (M), IJAVA_FRAME (M), ANY_FRAME, ...). | |
2656 // | |
2657 // After having OSR compiled M, `InterpretMethod' returns to the | |
2658 // frame manager, sending the message `retry_method_osr'. The stack | |
2659 // is: | |
2660 // | |
2661 // (IJAVA_FRAME (M), ANY_FRAME, ...). | |
2662 // | |
2663 // The compiler will have generated an `nmethod' suitable for | |
2664 // continuing execution of M at the bytecode index at which OSR took | |
2665 // place. So now the frame manager calls the OSR entry. The OSR | |
2666 // entry sets up a JIT_FRAME for M and continues execution of M with | |
2667 // initial state determined by the IJAVA_FRAME. | |
2668 // | |
2669 // (JIT_FRAME (M), IJAVA_FRAME (M), ANY_FRAME, ...). | |
2670 // | |
2671 | |
2672 __ BIND(retry_method_osr); | |
2673 { | |
2674 // | |
2675 // Registers alive | |
2676 // R16_thread | |
2677 // R15_prev_state - address of caller's BytecodeInterpreter | |
2678 // R14_state - address of callee's BytecodeInterpreter | |
2679 // R1_SP - callee's SP before call to InterpretMethod | |
2680 // | |
2681 // Registers updated | |
2682 // R17 - pointer to callee's locals array | |
2683 // (declared via `interpreter_arg_ptr_reg' in the AD file) | |
2684 // R19_method - callee's Method | |
2685 // R1_SP - callee's SP (will become SP of OSR adapter frame) | |
2686 // | |
2687 | |
2688 // Provide a debugger breakpoint in the frame manager if breakpoints | |
2689 // in osr'd methods are requested. | |
2690 #ifdef COMPILER2 | |
2691 NOT_PRODUCT( if (OptoBreakpointOSR) { __ illtrap(); } ) | |
2692 #endif | |
2693 | |
2694 // Load callee's pointer to locals array from callee's state. | |
2695 // __ ld(R17, state_(_locals)); | |
2696 | |
2697 // Load osr entry. | |
2698 __ ld(R12_scratch2, state_(_result._osr._osr_entry)); | |
2699 | |
2700 // Load address of temporary osr buffer to arg1. | |
2701 __ ld(R3_ARG1, state_(_result._osr._osr_buf)); | |
2702 __ mtctr(R12_scratch2); | |
2703 | |
2704 // Load method oop, gc may move it during execution of osr'd method. | |
2705 __ ld(R22_tmp2, state_(_method)); | |
2706 // Load message 'call_method'. | |
2707 __ li(R23_tmp3, BytecodeInterpreter::call_method); | |
2708 | |
2709 { | |
2710 // Pop the IJAVA frame of the method which we are going to call osr'd. | |
2711 Label no_state, skip_no_state; | |
2712 __ pop_interpreter_state(/*prev_state_may_be_0=*/true); | |
2713 __ cmpdi(CCR0, R14_state,0); | |
2714 __ beq(CCR0, no_state); | |
2715 // return to interpreter | |
2716 __ pop_interpreter_frame_to_state(R14_state, R11_scratch1, R12_scratch2, R21_tmp1); | |
2717 | |
2718 // Init _result._to_call._callee and tell gc that it contains a valid oop | |
2719 // by setting _msg to 'call_method'. | |
2720 __ std(R22_tmp2, state_(_result._to_call._callee)); | |
2721 // TODO: PPC port: assert(4 == BytecodeInterpreter::sz_msg(), "unexpected field size"); | |
2722 __ stw(R23_tmp3, state_(_msg)); | |
2723 | |
2724 __ load_const(R21_tmp1, frame_manager_specialized_return); | |
2725 __ b(skip_no_state); | |
2726 __ bind(no_state); | |
2727 | |
2728 // Return to initial caller. | |
2729 | |
2730 // Get rid of top frame. | |
2731 __ pop_frame(); | |
2732 | |
2733 // Load return PC from parent frame. | |
2734 __ ld(R21_tmp1, _parent_ijava_frame_abi(lr), R1_SP); | |
2735 | |
2736 // Resize frame to get rid of a potential extension. | |
2737 __ resize_frame_to_initial_caller(R11_scratch1, R12_scratch2); | |
2738 | |
2739 __ bind(skip_no_state); | |
2740 | |
2741 // Update LR with return pc. | |
2742 __ mtlr(R21_tmp1); | |
2743 } | |
2744 // Jump to the osr entry point. | |
2745 __ bctr(); | |
2746 | |
2747 } | |
2748 | |
2749 //============================================================================= | |
2750 // Interpreted method "returned" with an exception, pass it on. | |
2751 // Pass no result, unwind activation and continue/return to | |
2752 // interpreter/call_stub/c2. | |
2753 | |
2754 __ BIND(throwing_exception); | |
2755 | |
2756 // Check if this is the initial invocation of the frame manager. If | |
2757 // so, previous interpreter state in R15_prev_state will be null. | |
2758 | |
2759 // New tos of caller is callee's first parameter address, that is | |
2760 // callee's incoming arguments are popped. | |
2761 __ ld(R3_RET, state_(_locals)); | |
2762 | |
2763 // Check whether this is an initial call. | |
2764 __ cmpdi(CCR0, R15_prev_state, 0); | |
2765 // Yes, called from the call stub or from generated code via a c2i frame. | |
2766 __ beq(CCR0, unwind_initial_activation_pending_exception); | |
2767 | |
2768 // Send resume message, interpreter will see the exception first. | |
2769 | |
2770 __ li(msg, BytecodeInterpreter::method_resume); | |
2771 __ b(unwind_recursive_activation); | |
2772 | |
2773 | |
2774 //============================================================================= | |
2775 // Push the last instruction out to the code buffer. | |
2776 | |
2777 { | |
2778 __ unimplemented("end of InterpreterGenerator::generate_normal_entry", 128); | |
2779 } | |
2780 | |
2781 interpreter_frame_manager = entry; | |
2782 return interpreter_frame_manager; | |
2783 } | |
2784 | |
2785 // Generate code for various sorts of method entries | |
2786 // | |
2787 address AbstractInterpreterGenerator::generate_method_entry(AbstractInterpreter::MethodKind kind) { | |
2788 address entry_point = NULL; | |
2789 | |
2790 switch (kind) { | |
2791 case Interpreter::zerolocals : break; | |
2792 case Interpreter::zerolocals_synchronized : break; | |
2793 case Interpreter::native : // Fall thru | |
2794 case Interpreter::native_synchronized : entry_point = ((CppInterpreterGenerator*)this)->generate_native_entry(); break; | |
2795 case Interpreter::empty : break; | |
2796 case Interpreter::accessor : entry_point = ((InterpreterGenerator*)this)->generate_accessor_entry(); break; | |
2797 case Interpreter::abstract : entry_point = ((InterpreterGenerator*)this)->generate_abstract_entry(); break; | |
2798 // These are special interpreter intrinsics which we don't support so far. | |
2799 case Interpreter::java_lang_math_sin : break; | |
2800 case Interpreter::java_lang_math_cos : break; | |
2801 case Interpreter::java_lang_math_tan : break; | |
2802 case Interpreter::java_lang_math_abs : break; | |
2803 case Interpreter::java_lang_math_log : break; | |
2804 case Interpreter::java_lang_math_log10 : break; | |
2805 case Interpreter::java_lang_math_sqrt : break; | |
2806 case Interpreter::java_lang_math_pow : break; | |
2807 case Interpreter::java_lang_math_exp : break; | |
2808 case Interpreter::java_lang_ref_reference_get: entry_point = ((InterpreterGenerator*)this)->generate_Reference_get_entry(); break; | |
2809 default : ShouldNotReachHere(); break; | |
2810 } | |
2811 | |
2812 if (entry_point) { | |
2813 return entry_point; | |
2814 } | |
2815 return ((InterpreterGenerator*)this)->generate_normal_entry(); | |
2816 } | |
2817 | |
2818 InterpreterGenerator::InterpreterGenerator(StubQueue* code) | |
2819 : CppInterpreterGenerator(code) { | |
2820 generate_all(); // down here so it can be "virtual" | |
2821 } | |
2822 | |
2823 // How much stack a topmost interpreter method activation needs in words. | |
2824 int AbstractInterpreter::size_top_interpreter_activation(Method* method) { | |
2825 // Computation is in bytes not words to match layout_activation_impl | |
2826 // below, but the return is in words. | |
2827 | |
2828 // | |
2829 // 0 [TOP_IJAVA_FRAME_ABI] \ | |
2830 // alignment (optional) \ | | |
2831 // [operand stack / Java parameters] > stack | | | |
2832 // [monitors] (optional) > monitors | | | |
2833 // [PARENT_IJAVA_FRAME_ABI] \ | | | |
2834 // [BytecodeInterpreter object] > interpreter \ | | | | |
2835 // alignment (optional) | round | parent | round | top | |
2836 // [Java result] (2 slots) > result | | | | | |
2837 // [Java non-arg locals] \ locals | | | | | |
2838 // [arg locals] / / / / / | |
2839 // | |
2840 | |
2841 int locals = method->max_locals() * BytesPerWord; | |
2842 int interpreter = frame::interpreter_frame_cinterpreterstate_size_in_bytes(); | |
2843 int result = 2 * BytesPerWord; | |
2844 | |
2845 int parent = round_to(interpreter + result + locals, 16) + frame::parent_ijava_frame_abi_size; | |
2846 | |
2847 int stack = method->max_stack() * BytesPerWord; | |
2848 int monitors = method->is_synchronized() ? frame::interpreter_frame_monitor_size_in_bytes() : 0; | |
2849 int top = round_to(parent + monitors + stack, 16) + frame::top_ijava_frame_abi_size; | |
2850 | |
2851 return (top / BytesPerWord); | |
2852 } | |
2853 | |
2854 void BytecodeInterpreter::layout_interpreterState(interpreterState to_fill, | |
2855 frame* caller, | |
2856 frame* current, | |
2857 Method* method, | |
2858 intptr_t* locals, | |
2859 intptr_t* stack, | |
2860 intptr_t* stack_base, | |
2861 intptr_t* monitor_base, | |
2862 intptr_t* frame_sp, | |
2863 bool is_top_frame) { | |
2864 // What about any vtable? | |
2865 // | |
2866 to_fill->_thread = JavaThread::current(); | |
2867 // This gets filled in later but make it something recognizable for now. | |
2868 to_fill->_bcp = method->code_base(); | |
2869 to_fill->_locals = locals; | |
2870 to_fill->_constants = method->constants()->cache(); | |
2871 to_fill->_method = method; | |
2872 to_fill->_mdx = NULL; | |
2873 to_fill->_stack = stack; | |
2874 | |
2875 if (is_top_frame && JavaThread::current()->popframe_forcing_deopt_reexecution()) { | |
2876 to_fill->_msg = deopt_resume2; | |
2877 } else { | |
2878 to_fill->_msg = method_resume; | |
2879 } | |
2880 to_fill->_result._to_call._bcp_advance = 0; | |
2881 to_fill->_result._to_call._callee_entry_point = NULL; // doesn't matter to anyone | |
2882 to_fill->_result._to_call._callee = NULL; // doesn't matter to anyone | |
2883 to_fill->_prev_link = NULL; | |
2884 | |
2885 if (caller->is_interpreted_frame()) { | |
2886 interpreterState prev = caller->get_interpreterState(); | |
2887 | |
2888 // Support MH calls. Make sure the interpreter will return the right address: | |
2889 // 1. Caller did ordinary interpreted->compiled call call: Set a prev_state | |
2890 // which makes the CPP interpreter return to frame manager "return_from_interpreted_method" | |
2891 // entry after finishing execution. | |
2892 // 2. Caller did a MH call: If the caller has a MethodHandleInvoke in it's | |
2893 // state (invariant: must be the caller of the bottom vframe) we used the | |
2894 // "call_special" entry to do the call, meaning the arguments have not been | |
2895 // popped from the stack. Therefore, don't enter a prev state in this case | |
2896 // in order to return to "return_from_native" frame manager entry which takes | |
2897 // care of popping arguments. Also, don't overwrite the MH.invoke Method in | |
2898 // the prev_state in order to be able to figure out the number of arguments to | |
2899 // pop. | |
2900 // The parameter method can represent MethodHandle.invokeExact(...). | |
2901 // The MethodHandleCompiler generates these synthetic Methods, | |
2902 // including bytecodes, if an invokedynamic call gets inlined. In | |
2903 // this case we want to return like from any other interpreted | |
2904 // Java call, so we set _prev_link. | |
2905 to_fill->_prev_link = prev; | |
2906 | |
2907 if (*prev->_bcp == Bytecodes::_invokeinterface || *prev->_bcp == Bytecodes::_invokedynamic) { | |
2908 prev->_result._to_call._bcp_advance = 5; | |
2909 } else { | |
2910 prev->_result._to_call._bcp_advance = 3; | |
2911 } | |
2912 } | |
2913 to_fill->_oop_temp = NULL; | |
2914 to_fill->_stack_base = stack_base; | |
2915 // Need +1 here because stack_base points to the word just above the | |
2916 // first expr stack entry and stack_limit is supposed to point to | |
2917 // the word just below the last expr stack entry. See | |
2918 // generate_compute_interpreter_state. | |
2919 to_fill->_stack_limit = stack_base - (method->max_stack() + 1); | |
2920 to_fill->_monitor_base = (BasicObjectLock*) monitor_base; | |
2921 | |
2922 to_fill->_frame_bottom = frame_sp; | |
2923 | |
2924 // PPC64 specific | |
2925 to_fill->_last_Java_pc = NULL; | |
2926 to_fill->_last_Java_fp = NULL; | |
2927 to_fill->_last_Java_sp = frame_sp; | |
2928 #ifdef ASSERT | |
2929 to_fill->_self_link = to_fill; | |
2930 to_fill->_native_fresult = 123456.789; | |
2931 to_fill->_native_lresult = CONST64(0xdeafcafedeadc0de); | |
2932 #endif | |
2933 } | |
2934 | |
2935 void BytecodeInterpreter::pd_layout_interpreterState(interpreterState istate, | |
2936 address last_Java_pc, | |
2937 intptr_t* last_Java_fp) { | |
2938 istate->_last_Java_pc = last_Java_pc; | |
2939 istate->_last_Java_fp = last_Java_fp; | |
2940 } | |
2941 | |
2942 int AbstractInterpreter::layout_activation(Method* method, | |
2943 int temps, // Number of slots on java expression stack in use. | |
2944 int popframe_args, | |
2945 int monitors, // Number of active monitors. | |
2946 int caller_actual_parameters, | |
2947 int callee_params,// Number of slots for callee parameters. | |
2948 int callee_locals,// Number of slots for locals. | |
2949 frame* caller, | |
2950 frame* interpreter_frame, | |
2951 bool is_top_frame, | |
2952 bool is_bottom_frame) { | |
2953 | |
2954 // NOTE this code must exactly mimic what | |
2955 // InterpreterGenerator::generate_compute_interpreter_state() does | |
2956 // as far as allocating an interpreter frame. However there is an | |
2957 // exception. With the C++ based interpreter only the top most frame | |
2958 // has a full sized expression stack. The 16 byte slop factor is | |
2959 // both the abi scratch area and a place to hold a result from a | |
2960 // callee on its way to the callers stack. | |
2961 | |
2962 int monitor_size = frame::interpreter_frame_monitor_size_in_bytes() * monitors; | |
2963 int frame_size; | |
2964 int top_frame_size = round_to(frame::interpreter_frame_cinterpreterstate_size_in_bytes() | |
2965 + monitor_size | |
2966 + (method->max_stack() *Interpreter::stackElementWords * BytesPerWord) | |
2967 + 2*BytesPerWord, | |
2968 frame::alignment_in_bytes) | |
2969 + frame::top_ijava_frame_abi_size; | |
2970 if (is_top_frame) { | |
2971 frame_size = top_frame_size; | |
2972 } else { | |
2973 frame_size = round_to(frame::interpreter_frame_cinterpreterstate_size_in_bytes() | |
2974 + monitor_size | |
2975 + ((temps - callee_params + callee_locals) * | |
2976 Interpreter::stackElementWords * BytesPerWord) | |
2977 + 2*BytesPerWord, | |
2978 frame::alignment_in_bytes) | |
2979 + frame::parent_ijava_frame_abi_size; | |
2980 assert(popframe_args==0, "non-zero for top_frame only"); | |
2981 } | |
2982 | |
2983 // If we actually have a frame to layout we must now fill in all the pieces. | |
2984 if (interpreter_frame != NULL) { | |
2985 | |
2986 intptr_t sp = (intptr_t)interpreter_frame->sp(); | |
2987 intptr_t fp = *(intptr_t *)sp; | |
2988 assert(fp == (intptr_t)caller->sp(), "fp must match"); | |
2989 interpreterState cur_state = | |
2990 (interpreterState)(fp - frame::interpreter_frame_cinterpreterstate_size_in_bytes()); | |
2991 | |
2992 // Now fill in the interpreterState object. | |
2993 | |
2994 intptr_t* locals; | |
2995 if (caller->is_interpreted_frame()) { | |
2996 // Locals must agree with the caller because it will be used to set the | |
2997 // caller's tos when we return. | |
2998 interpreterState prev = caller->get_interpreterState(); | |
2999 // Calculate start of "locals" for MH calls. For MH calls, the | |
3000 // current method() (= MH target) and prev->callee() (= | |
3001 // MH.invoke*()) are different and especially have different | |
3002 // signatures. To pop the argumentsof the caller, we must use | |
3003 // the prev->callee()->size_of_arguments() because that's what | |
3004 // the caller actually pushed. Currently, for synthetic MH | |
3005 // calls (deoptimized from inlined MH calls), detected by | |
3006 // is_method_handle_invoke(), we use the callee's arguments | |
3007 // because here, the caller's and callee's signature match. | |
3008 if (true /*!caller->is_at_mh_callsite()*/) { | |
3009 locals = prev->stack() + method->size_of_parameters(); | |
3010 } else { | |
3011 // Normal MH call. | |
3012 locals = prev->stack() + prev->callee()->size_of_parameters(); | |
3013 } | |
3014 } else { | |
3015 bool is_deopted; | |
3016 locals = (intptr_t*) (fp + ((method->max_locals() - 1) * BytesPerWord) + | |
3017 frame::parent_ijava_frame_abi_size); | |
3018 } | |
3019 | |
3020 intptr_t* monitor_base = (intptr_t*) cur_state; | |
3021 intptr_t* stack_base = (intptr_t*) ((intptr_t) monitor_base - monitor_size); | |
3022 | |
3023 // Provide pop_frame capability on PPC64, add popframe_args. | |
3024 // +1 because stack is always prepushed. | |
3025 intptr_t* stack = (intptr_t*) ((intptr_t) stack_base - (temps + popframe_args + 1) * BytesPerWord); | |
3026 | |
3027 BytecodeInterpreter::layout_interpreterState(cur_state, | |
3028 caller, | |
3029 interpreter_frame, | |
3030 method, | |
3031 locals, | |
3032 stack, | |
3033 stack_base, | |
3034 monitor_base, | |
3035 (intptr_t*)(((intptr_t)fp)-top_frame_size), | |
3036 is_top_frame); | |
3037 | |
3038 BytecodeInterpreter::pd_layout_interpreterState(cur_state, interpreter_return_address, | |
3039 interpreter_frame->fp()); | |
3040 } | |
3041 return frame_size/BytesPerWord; | |
3042 } | |
3043 | |
3044 #endif // CC_INTERP |