Mercurial > hg > truffle
comparison src/cpu/ppc/vm/templateInterpreter_ppc.cpp @ 17804:fd1b9f02cc91
8036976: PPC64: implement the template interpreter
Reviewed-by: kvn, coleenp
Contributed-by: axel.siebenborn@sap.com, martin.doerr@sap.com
author | goetz |
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date | Mon, 10 Mar 2014 12:58:02 +0100 |
parents | |
children | 6048424d3865 |
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1 /* | |
2 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. | |
3 * Copyright 2013, 2014 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 #ifndef CC_INTERP | |
28 #include "asm/macroAssembler.inline.hpp" | |
29 #include "interpreter/bytecodeHistogram.hpp" | |
30 #include "interpreter/interpreter.hpp" | |
31 #include "interpreter/interpreterGenerator.hpp" | |
32 #include "interpreter/interpreterRuntime.hpp" | |
33 #include "interpreter/templateTable.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/sharedRuntime.hpp" | |
44 #include "runtime/stubRoutines.hpp" | |
45 #include "runtime/synchronizer.hpp" | |
46 #include "runtime/timer.hpp" | |
47 #include "runtime/vframeArray.hpp" | |
48 #include "utilities/debug.hpp" | |
49 #include "utilities/macros.hpp" | |
50 | |
51 #undef __ | |
52 #define __ _masm-> | |
53 | |
54 #ifdef PRODUCT | |
55 #define BLOCK_COMMENT(str) /* nothing */ | |
56 #else | |
57 #define BLOCK_COMMENT(str) __ block_comment(str) | |
58 #endif | |
59 | |
60 #define BIND(label) bind(label); BLOCK_COMMENT(#label ":") | |
61 | |
62 //----------------------------------------------------------------------------- | |
63 | |
64 // Actually we should never reach here since we do stack overflow checks before pushing any frame. | |
65 address TemplateInterpreterGenerator::generate_StackOverflowError_handler() { | |
66 address entry = __ pc(); | |
67 __ unimplemented("generate_StackOverflowError_handler"); | |
68 return entry; | |
69 } | |
70 | |
71 address TemplateInterpreterGenerator::generate_ArrayIndexOutOfBounds_handler(const char* name) { | |
72 address entry = __ pc(); | |
73 __ empty_expression_stack(); | |
74 __ load_const_optimized(R4_ARG2, (address) name); | |
75 // Index is in R17_tos. | |
76 __ mr(R5_ARG3, R17_tos); | |
77 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException)); | |
78 return entry; | |
79 } | |
80 | |
81 #if 0 | |
82 // Call special ClassCastException constructor taking object to cast | |
83 // and target class as arguments. | |
84 address TemplateInterpreterGenerator::generate_ClassCastException_verbose_handler(const char* name) { | |
85 address entry = __ pc(); | |
86 | |
87 // Target class oop is in register R6_ARG4 by convention! | |
88 | |
89 // Expression stack must be empty before entering the VM if an | |
90 // exception happened. | |
91 __ empty_expression_stack(); | |
92 // Setup parameters. | |
93 // Thread will be loaded to R3_ARG1. | |
94 __ load_const_optimized(R4_ARG2, (address) name); | |
95 __ mr(R5_ARG3, R17_tos); | |
96 // R6_ARG4 contains specified class. | |
97 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_ClassCastException_verbose)); | |
98 #ifdef ASSERT | |
99 // Above call must not return here since exception pending. | |
100 __ should_not_reach_here(); | |
101 #endif | |
102 return entry; | |
103 } | |
104 #endif | |
105 | |
106 address TemplateInterpreterGenerator::generate_ClassCastException_handler() { | |
107 address entry = __ pc(); | |
108 // Expression stack must be empty before entering the VM if an | |
109 // exception happened. | |
110 __ empty_expression_stack(); | |
111 | |
112 // Load exception object. | |
113 // Thread will be loaded to R3_ARG1. | |
114 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_ClassCastException), R17_tos); | |
115 #ifdef ASSERT | |
116 // Above call must not return here since exception pending. | |
117 __ should_not_reach_here(); | |
118 #endif | |
119 return entry; | |
120 } | |
121 | |
122 address TemplateInterpreterGenerator::generate_exception_handler_common(const char* name, const char* message, bool pass_oop) { | |
123 address entry = __ pc(); | |
124 //__ untested("generate_exception_handler_common"); | |
125 Register Rexception = R17_tos; | |
126 | |
127 // Expression stack must be empty before entering the VM if an exception happened. | |
128 __ empty_expression_stack(); | |
129 | |
130 __ load_const_optimized(R4_ARG2, (address) name, R11_scratch1); | |
131 if (pass_oop) { | |
132 __ mr(R5_ARG3, Rexception); | |
133 __ call_VM(Rexception, CAST_FROM_FN_PTR(address, InterpreterRuntime::create_klass_exception), false); | |
134 } else { | |
135 __ load_const_optimized(R5_ARG3, (address) message, R11_scratch1); | |
136 __ call_VM(Rexception, CAST_FROM_FN_PTR(address, InterpreterRuntime::create_exception), false); | |
137 } | |
138 | |
139 // Throw exception. | |
140 __ mr(R3_ARG1, Rexception); | |
141 __ load_const_optimized(R11_scratch1, Interpreter::throw_exception_entry(), R12_scratch2); | |
142 __ mtctr(R11_scratch1); | |
143 __ bctr(); | |
144 | |
145 return entry; | |
146 } | |
147 | |
148 address TemplateInterpreterGenerator::generate_continuation_for(TosState state) { | |
149 address entry = __ pc(); | |
150 __ unimplemented("generate_continuation_for"); | |
151 return entry; | |
152 } | |
153 | |
154 // This entry is returned to when a call returns to the interpreter. | |
155 // When we arrive here, we expect that the callee stack frame is already popped. | |
156 address TemplateInterpreterGenerator::generate_return_entry_for(TosState state, int step, size_t index_size) { | |
157 address entry = __ pc(); | |
158 | |
159 // Move the value out of the return register back to the TOS cache of current frame. | |
160 switch (state) { | |
161 case ltos: | |
162 case btos: | |
163 case ctos: | |
164 case stos: | |
165 case atos: | |
166 case itos: __ mr(R17_tos, R3_RET); break; // RET -> TOS cache | |
167 case ftos: | |
168 case dtos: __ fmr(F15_ftos, F1_RET); break; // TOS cache -> GR_FRET | |
169 case vtos: break; // Nothing to do, this was a void return. | |
170 default : ShouldNotReachHere(); | |
171 } | |
172 | |
173 __ restore_interpreter_state(R11_scratch1); // Sets R11_scratch1 = fp. | |
174 __ ld(R12_scratch2, _ijava_state_neg(top_frame_sp), R11_scratch1); | |
175 __ resize_frame_absolute(R12_scratch2, R11_scratch1, R0); | |
176 | |
177 // Compiled code destroys templateTableBase, reload. | |
178 __ load_const_optimized(R25_templateTableBase, (address)Interpreter::dispatch_table((TosState)0), R12_scratch2); | |
179 | |
180 const Register cache = R11_scratch1; | |
181 const Register size = R12_scratch2; | |
182 __ get_cache_and_index_at_bcp(cache, 1, index_size); | |
183 | |
184 // Big Endian (get least significant byte of 64 bit value): | |
185 __ lbz(size, in_bytes(ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::flags_offset()) + 7, cache); | |
186 __ sldi(size, size, Interpreter::logStackElementSize); | |
187 __ add(R15_esp, R15_esp, size); | |
188 __ dispatch_next(state, step); | |
189 return entry; | |
190 } | |
191 | |
192 address TemplateInterpreterGenerator::generate_deopt_entry_for(TosState state, int step) { | |
193 address entry = __ pc(); | |
194 // If state != vtos, we're returning from a native method, which put it's result | |
195 // into the result register. So move the value out of the return register back | |
196 // to the TOS cache of current frame. | |
197 | |
198 switch (state) { | |
199 case ltos: | |
200 case btos: | |
201 case ctos: | |
202 case stos: | |
203 case atos: | |
204 case itos: __ mr(R17_tos, R3_RET); break; // GR_RET -> TOS cache | |
205 case ftos: | |
206 case dtos: __ fmr(F15_ftos, F1_RET); break; // TOS cache -> GR_FRET | |
207 case vtos: break; // Nothing to do, this was a void return. | |
208 default : ShouldNotReachHere(); | |
209 } | |
210 | |
211 // Load LcpoolCache @@@ should be already set! | |
212 __ get_constant_pool_cache(R27_constPoolCache); | |
213 | |
214 // Handle a pending exception, fall through if none. | |
215 __ check_and_forward_exception(R11_scratch1, R12_scratch2); | |
216 | |
217 // Start executing bytecodes. | |
218 __ dispatch_next(state, step); | |
219 | |
220 return entry; | |
221 } | |
222 | |
223 // A result handler converts the native result into java format. | |
224 // Use the shared code between c++ and template interpreter. | |
225 address TemplateInterpreterGenerator::generate_result_handler_for(BasicType type) { | |
226 return AbstractInterpreterGenerator::generate_result_handler_for(type); | |
227 } | |
228 | |
229 address TemplateInterpreterGenerator::generate_safept_entry_for(TosState state, address runtime_entry) { | |
230 address entry = __ pc(); | |
231 | |
232 __ push(state); | |
233 __ call_VM(noreg, runtime_entry); | |
234 __ dispatch_via(vtos, Interpreter::_normal_table.table_for(vtos)); | |
235 | |
236 return entry; | |
237 } | |
238 | |
239 // Helpers for commoning out cases in the various type of method entries. | |
240 | |
241 // Increment invocation count & check for overflow. | |
242 // | |
243 // Note: checking for negative value instead of overflow | |
244 // so we have a 'sticky' overflow test. | |
245 // | |
246 void TemplateInterpreterGenerator::generate_counter_incr(Label* overflow, Label* profile_method, Label* profile_method_continue) { | |
247 // Note: In tiered we increment either counters in method or in MDO depending if we're profiling or not. | |
248 Register Rscratch1 = R11_scratch1; | |
249 Register Rscratch2 = R12_scratch2; | |
250 Register R3_counters = R3_ARG1; | |
251 Label done; | |
252 | |
253 if (TieredCompilation) { | |
254 const int increment = InvocationCounter::count_increment; | |
255 const int mask = ((1 << Tier0InvokeNotifyFreqLog) - 1) << InvocationCounter::count_shift; | |
256 Label no_mdo; | |
257 if (ProfileInterpreter) { | |
258 const Register Rmdo = Rscratch1; | |
259 // If no method data exists, go to profile_continue. | |
260 __ ld(Rmdo, in_bytes(Method::method_data_offset()), R19_method); | |
261 __ cmpdi(CCR0, Rmdo, 0); | |
262 __ beq(CCR0, no_mdo); | |
263 | |
264 // Increment backedge counter in the MDO. | |
265 const int mdo_bc_offs = in_bytes(MethodData::backedge_counter_offset()) + in_bytes(InvocationCounter::counter_offset()); | |
266 __ lwz(Rscratch2, mdo_bc_offs, Rmdo); | |
267 __ addi(Rscratch2, Rscratch2, increment); | |
268 __ stw(Rscratch2, mdo_bc_offs, Rmdo); | |
269 __ load_const_optimized(Rscratch1, mask, R0); | |
270 __ and_(Rscratch1, Rscratch2, Rscratch1); | |
271 __ bne(CCR0, done); | |
272 __ b(*overflow); | |
273 } | |
274 | |
275 // Increment counter in MethodCounters*. | |
276 const int mo_bc_offs = in_bytes(MethodCounters::backedge_counter_offset()) + in_bytes(InvocationCounter::counter_offset()); | |
277 __ bind(no_mdo); | |
278 __ get_method_counters(R19_method, R3_counters, done); | |
279 __ lwz(Rscratch2, mo_bc_offs, R3_counters); | |
280 __ addi(Rscratch2, Rscratch2, increment); | |
281 __ stw(Rscratch2, mo_bc_offs, R3_counters); | |
282 __ load_const_optimized(Rscratch1, mask, R0); | |
283 __ and_(Rscratch1, Rscratch2, Rscratch1); | |
284 __ beq(CCR0, *overflow); | |
285 | |
286 __ bind(done); | |
287 | |
288 } else { | |
289 | |
290 // Update standard invocation counters. | |
291 Register Rsum_ivc_bec = R4_ARG2; | |
292 __ get_method_counters(R19_method, R3_counters, done); | |
293 __ increment_invocation_counter(R3_counters, Rsum_ivc_bec, R12_scratch2); | |
294 // Increment interpreter invocation counter. | |
295 if (ProfileInterpreter) { // %%% Merge this into methodDataOop. | |
296 __ lwz(R12_scratch2, in_bytes(MethodCounters::interpreter_invocation_counter_offset()), R3_counters); | |
297 __ addi(R12_scratch2, R12_scratch2, 1); | |
298 __ stw(R12_scratch2, in_bytes(MethodCounters::interpreter_invocation_counter_offset()), R3_counters); | |
299 } | |
300 // Check if we must create a method data obj. | |
301 if (ProfileInterpreter && profile_method != NULL) { | |
302 const Register profile_limit = Rscratch1; | |
303 int pl_offs = __ load_const_optimized(profile_limit, &InvocationCounter::InterpreterProfileLimit, R0, true); | |
304 __ lwz(profile_limit, pl_offs, profile_limit); | |
305 // Test to see if we should create a method data oop. | |
306 __ cmpw(CCR0, Rsum_ivc_bec, profile_limit); | |
307 __ blt(CCR0, *profile_method_continue); | |
308 // If no method data exists, go to profile_method. | |
309 __ test_method_data_pointer(*profile_method); | |
310 } | |
311 // Finally check for counter overflow. | |
312 if (overflow) { | |
313 const Register invocation_limit = Rscratch1; | |
314 int il_offs = __ load_const_optimized(invocation_limit, &InvocationCounter::InterpreterInvocationLimit, R0, true); | |
315 __ lwz(invocation_limit, il_offs, invocation_limit); | |
316 assert(4 == sizeof(InvocationCounter::InterpreterInvocationLimit), "unexpected field size"); | |
317 __ cmpw(CCR0, Rsum_ivc_bec, invocation_limit); | |
318 __ bge(CCR0, *overflow); | |
319 } | |
320 | |
321 __ bind(done); | |
322 } | |
323 } | |
324 | |
325 // Generate code to initiate compilation on invocation counter overflow. | |
326 void TemplateInterpreterGenerator::generate_counter_overflow(Label& continue_entry) { | |
327 // Generate code to initiate compilation on the counter overflow. | |
328 | |
329 // InterpreterRuntime::frequency_counter_overflow takes one arguments, | |
330 // which indicates if the counter overflow occurs at a backwards branch (NULL bcp) | |
331 // We pass zero in. | |
332 // The call returns the address of the verified entry point for the method or NULL | |
333 // if the compilation did not complete (either went background or bailed out). | |
334 // | |
335 // Unlike the C++ interpreter above: Check exceptions! | |
336 // Assumption: Caller must set the flag "do_not_unlock_if_sychronized" if the monitor of a sync'ed | |
337 // method has not yet been created. Thus, no unlocking of a non-existing monitor can occur. | |
338 | |
339 __ li(R4_ARG2, 0); | |
340 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::frequency_counter_overflow), R4_ARG2, true); | |
341 | |
342 // Returns verified_entry_point or NULL. | |
343 // We ignore it in any case. | |
344 __ b(continue_entry); | |
345 } | |
346 | |
347 void TemplateInterpreterGenerator::generate_stack_overflow_check(Register Rmem_frame_size, Register Rscratch1) { | |
348 assert_different_registers(Rmem_frame_size, Rscratch1); | |
349 __ generate_stack_overflow_check_with_compare_and_throw(Rmem_frame_size, Rscratch1); | |
350 } | |
351 | |
352 void TemplateInterpreterGenerator::unlock_method(bool check_exceptions) { | |
353 __ unlock_object(R26_monitor, check_exceptions); | |
354 } | |
355 | |
356 // Lock the current method, interpreter register window must be set up! | |
357 void TemplateInterpreterGenerator::lock_method(Register Rflags, Register Rscratch1, Register Rscratch2, bool flags_preloaded) { | |
358 const Register Robj_to_lock = Rscratch2; | |
359 | |
360 { | |
361 if (!flags_preloaded) { | |
362 __ lwz(Rflags, method_(access_flags)); | |
363 } | |
364 | |
365 #ifdef ASSERT | |
366 // Check if methods needs synchronization. | |
367 { | |
368 Label Lok; | |
369 __ testbitdi(CCR0, R0, Rflags, JVM_ACC_SYNCHRONIZED_BIT); | |
370 __ btrue(CCR0,Lok); | |
371 __ stop("method doesn't need synchronization"); | |
372 __ bind(Lok); | |
373 } | |
374 #endif // ASSERT | |
375 } | |
376 | |
377 // Get synchronization object to Rscratch2. | |
378 { | |
379 const int mirror_offset = in_bytes(Klass::java_mirror_offset()); | |
380 Label Lstatic; | |
381 Label Ldone; | |
382 | |
383 __ testbitdi(CCR0, R0, Rflags, JVM_ACC_STATIC_BIT); | |
384 __ btrue(CCR0, Lstatic); | |
385 | |
386 // Non-static case: load receiver obj from stack and we're done. | |
387 __ ld(Robj_to_lock, R18_locals); | |
388 __ b(Ldone); | |
389 | |
390 __ bind(Lstatic); // Static case: Lock the java mirror | |
391 __ ld(Robj_to_lock, in_bytes(Method::const_offset()), R19_method); | |
392 __ ld(Robj_to_lock, in_bytes(ConstMethod::constants_offset()), Robj_to_lock); | |
393 __ ld(Robj_to_lock, ConstantPool::pool_holder_offset_in_bytes(), Robj_to_lock); | |
394 __ ld(Robj_to_lock, mirror_offset, Robj_to_lock); | |
395 | |
396 __ bind(Ldone); | |
397 __ verify_oop(Robj_to_lock); | |
398 } | |
399 | |
400 // Got the oop to lock => execute! | |
401 __ add_monitor_to_stack(true, Rscratch1, R0); | |
402 | |
403 __ std(Robj_to_lock, BasicObjectLock::obj_offset_in_bytes(), R26_monitor); | |
404 __ lock_object(R26_monitor, Robj_to_lock); | |
405 } | |
406 | |
407 // Generate a fixed interpreter frame for pure interpreter | |
408 // and I2N native transition frames. | |
409 // | |
410 // Before (stack grows downwards): | |
411 // | |
412 // | ... | | |
413 // |------------- | | |
414 // | java arg0 | | |
415 // | ... | | |
416 // | java argn | | |
417 // | | <- R15_esp | |
418 // | | | |
419 // |--------------| | |
420 // | abi_112 | | |
421 // | | <- R1_SP | |
422 // |==============| | |
423 // | |
424 // | |
425 // After: | |
426 // | |
427 // | ... | | |
428 // | java arg0 |<- R18_locals | |
429 // | ... | | |
430 // | java argn | | |
431 // |--------------| | |
432 // | | | |
433 // | java locals | | |
434 // | | | |
435 // |--------------| | |
436 // | abi_48 | | |
437 // |==============| | |
438 // | | | |
439 // | istate | | |
440 // | | | |
441 // |--------------| | |
442 // | monitor |<- R26_monitor | |
443 // |--------------| | |
444 // | |<- R15_esp | |
445 // | expression | | |
446 // | stack | | |
447 // | | | |
448 // |--------------| | |
449 // | | | |
450 // | abi_112 |<- R1_SP | |
451 // |==============| | |
452 // | |
453 // The top most frame needs an abi space of 112 bytes. This space is needed, | |
454 // since we call to c. The c function may spill their arguments to the caller | |
455 // frame. When we call to java, we don't need these spill slots. In order to save | |
456 // space on the stack, we resize the caller. However, java local reside in | |
457 // the caller frame and the frame has to be increased. The frame_size for the | |
458 // current frame was calculated based on max_stack as size for the expression | |
459 // stack. At the call, just a part of the expression stack might be used. | |
460 // We don't want to waste this space and cut the frame back accordingly. | |
461 // The resulting amount for resizing is calculated as follows: | |
462 // resize = (number_of_locals - number_of_arguments) * slot_size | |
463 // + (R1_SP - R15_esp) + 48 | |
464 // | |
465 // The size for the callee frame is calculated: | |
466 // framesize = 112 + max_stack + monitor + state_size | |
467 // | |
468 // maxstack: Max number of slots on the expression stack, loaded from the method. | |
469 // monitor: We statically reserve room for one monitor object. | |
470 // state_size: We save the current state of the interpreter to this area. | |
471 // | |
472 void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call, Register Rsize_of_parameters, Register Rsize_of_locals) { | |
473 Register parent_frame_resize = R6_ARG4, // Frame will grow by this number of bytes. | |
474 top_frame_size = R7_ARG5, | |
475 Rconst_method = R8_ARG6; | |
476 | |
477 assert_different_registers(Rsize_of_parameters, Rsize_of_locals, parent_frame_resize, top_frame_size); | |
478 | |
479 __ ld(Rconst_method, method_(const)); | |
480 __ lhz(Rsize_of_parameters /* number of params */, | |
481 in_bytes(ConstMethod::size_of_parameters_offset()), Rconst_method); | |
482 if (native_call) { | |
483 // If we're calling a native method, we reserve space for the worst-case signature | |
484 // handler varargs vector, which is max(Argument::n_register_parameters, parameter_count+2). | |
485 // We add two slots to the parameter_count, one for the jni | |
486 // environment and one for a possible native mirror. | |
487 Label skip_native_calculate_max_stack; | |
488 __ addi(top_frame_size, Rsize_of_parameters, 2); | |
489 __ cmpwi(CCR0, top_frame_size, Argument::n_register_parameters); | |
490 __ bge(CCR0, skip_native_calculate_max_stack); | |
491 __ li(top_frame_size, Argument::n_register_parameters); | |
492 __ bind(skip_native_calculate_max_stack); | |
493 __ sldi(Rsize_of_parameters, Rsize_of_parameters, Interpreter::logStackElementSize); | |
494 __ sldi(top_frame_size, top_frame_size, Interpreter::logStackElementSize); | |
495 __ sub(parent_frame_resize, R1_SP, R15_esp); // <0, off by Interpreter::stackElementSize! | |
496 assert(Rsize_of_locals == noreg, "Rsize_of_locals not initialized"); // Only relevant value is Rsize_of_parameters. | |
497 } else { | |
498 __ lhz(Rsize_of_locals /* number of params */, in_bytes(ConstMethod::size_of_locals_offset()), Rconst_method); | |
499 __ sldi(Rsize_of_parameters, Rsize_of_parameters, Interpreter::logStackElementSize); | |
500 __ sldi(Rsize_of_locals, Rsize_of_locals, Interpreter::logStackElementSize); | |
501 __ lhz(top_frame_size, in_bytes(ConstMethod::max_stack_offset()), Rconst_method); | |
502 __ sub(R11_scratch1, Rsize_of_locals, Rsize_of_parameters); // >=0 | |
503 __ sub(parent_frame_resize, R1_SP, R15_esp); // <0, off by Interpreter::stackElementSize! | |
504 __ sldi(top_frame_size, top_frame_size, Interpreter::logStackElementSize); | |
505 __ add(parent_frame_resize, parent_frame_resize, R11_scratch1); | |
506 } | |
507 | |
508 // Compute top frame size. | |
509 __ addi(top_frame_size, top_frame_size, frame::abi_reg_args_size + frame::ijava_state_size); | |
510 | |
511 // Cut back area between esp and max_stack. | |
512 __ addi(parent_frame_resize, parent_frame_resize, frame::abi_minframe_size - Interpreter::stackElementSize); | |
513 | |
514 __ round_to(top_frame_size, frame::alignment_in_bytes); | |
515 __ round_to(parent_frame_resize, frame::alignment_in_bytes); | |
516 // parent_frame_resize = (locals-parameters) - (ESP-SP-ABI48) Rounded to frame alignment size. | |
517 // Enlarge by locals-parameters (not in case of native_call), shrink by ESP-SP-ABI48. | |
518 | |
519 { | |
520 // -------------------------------------------------------------------------- | |
521 // Stack overflow check | |
522 | |
523 Label cont; | |
524 __ add(R11_scratch1, parent_frame_resize, top_frame_size); | |
525 generate_stack_overflow_check(R11_scratch1, R12_scratch2); | |
526 } | |
527 | |
528 // Set up interpreter state registers. | |
529 | |
530 __ add(R18_locals, R15_esp, Rsize_of_parameters); | |
531 __ ld(R27_constPoolCache, in_bytes(ConstMethod::constants_offset()), Rconst_method); | |
532 __ ld(R27_constPoolCache, ConstantPool::cache_offset_in_bytes(), R27_constPoolCache); | |
533 | |
534 // Set method data pointer. | |
535 if (ProfileInterpreter) { | |
536 Label zero_continue; | |
537 __ ld(R28_mdx, method_(method_data)); | |
538 __ cmpdi(CCR0, R28_mdx, 0); | |
539 __ beq(CCR0, zero_continue); | |
540 __ addi(R28_mdx, R28_mdx, in_bytes(MethodData::data_offset())); | |
541 __ bind(zero_continue); | |
542 } | |
543 | |
544 if (native_call) { | |
545 __ li(R14_bcp, 0); // Must initialize. | |
546 } else { | |
547 __ add(R14_bcp, in_bytes(ConstMethod::codes_offset()), Rconst_method); | |
548 } | |
549 | |
550 // Resize parent frame. | |
551 __ mflr(R12_scratch2); | |
552 __ neg(parent_frame_resize, parent_frame_resize); | |
553 __ resize_frame(parent_frame_resize, R11_scratch1); | |
554 __ std(R12_scratch2, _abi(lr), R1_SP); | |
555 | |
556 __ addi(R26_monitor, R1_SP, - frame::ijava_state_size); | |
557 __ addi(R15_esp, R26_monitor, - Interpreter::stackElementSize); | |
558 | |
559 // Store values. | |
560 // R15_esp, R14_bcp, R26_monitor, R28_mdx are saved at java calls | |
561 // in InterpreterMacroAssembler::call_from_interpreter. | |
562 __ std(R19_method, _ijava_state_neg(method), R1_SP); | |
563 __ std(R21_sender_SP, _ijava_state_neg(sender_sp), R1_SP); | |
564 __ std(R27_constPoolCache, _ijava_state_neg(cpoolCache), R1_SP); | |
565 __ std(R18_locals, _ijava_state_neg(locals), R1_SP); | |
566 | |
567 // Note: esp, bcp, monitor, mdx live in registers. Hence, the correct version can only | |
568 // be found in the frame after save_interpreter_state is done. This is always true | |
569 // for non-top frames. But when a signal occurs, dumping the top frame can go wrong, | |
570 // because e.g. frame::interpreter_frame_bcp() will not access the correct value | |
571 // (Enhanced Stack Trace). | |
572 // The signal handler does not save the interpreter state into the frame. | |
573 __ li(R0, 0); | |
574 #ifdef ASSERT | |
575 // Fill remaining slots with constants. | |
576 __ load_const_optimized(R11_scratch1, 0x5afe); | |
577 __ load_const_optimized(R12_scratch2, 0xdead); | |
578 #endif | |
579 // We have to initialize some frame slots for native calls (accessed by GC). | |
580 if (native_call) { | |
581 __ std(R26_monitor, _ijava_state_neg(monitors), R1_SP); | |
582 __ std(R14_bcp, _ijava_state_neg(bcp), R1_SP); | |
583 if (ProfileInterpreter) { __ std(R28_mdx, _ijava_state_neg(mdx), R1_SP); } | |
584 } | |
585 #ifdef ASSERT | |
586 else { | |
587 __ std(R12_scratch2, _ijava_state_neg(monitors), R1_SP); | |
588 __ std(R12_scratch2, _ijava_state_neg(bcp), R1_SP); | |
589 __ std(R12_scratch2, _ijava_state_neg(mdx), R1_SP); | |
590 } | |
591 __ std(R11_scratch1, _ijava_state_neg(ijava_reserved), R1_SP); | |
592 __ std(R12_scratch2, _ijava_state_neg(esp), R1_SP); | |
593 __ std(R12_scratch2, _ijava_state_neg(lresult), R1_SP); | |
594 __ std(R12_scratch2, _ijava_state_neg(fresult), R1_SP); | |
595 #endif | |
596 __ subf(R12_scratch2, top_frame_size, R1_SP); | |
597 __ std(R0, _ijava_state_neg(oop_tmp), R1_SP); | |
598 __ std(R12_scratch2, _ijava_state_neg(top_frame_sp), R1_SP); | |
599 | |
600 // Push top frame. | |
601 __ push_frame(top_frame_size, R11_scratch1); | |
602 } | |
603 | |
604 // End of helpers | |
605 | |
606 // ============================================================================ | |
607 // Various method entries | |
608 // | |
609 | |
610 // Empty method, generate a very fast return. We must skip this entry if | |
611 // someone's debugging, indicated by the flag | |
612 // "interp_mode" in the Thread obj. | |
613 // Note: empty methods are generated mostly methods that do assertions, which are | |
614 // disabled in the "java opt build". | |
615 address TemplateInterpreterGenerator::generate_empty_entry(void) { | |
616 if (!UseFastEmptyMethods) { | |
617 NOT_PRODUCT(__ should_not_reach_here();) | |
618 return Interpreter::entry_for_kind(Interpreter::zerolocals); | |
619 } | |
620 | |
621 Label Lslow_path; | |
622 const Register Rjvmti_mode = R11_scratch1; | |
623 address entry = __ pc(); | |
624 | |
625 __ lwz(Rjvmti_mode, thread_(interp_only_mode)); | |
626 __ cmpwi(CCR0, Rjvmti_mode, 0); | |
627 __ bne(CCR0, Lslow_path); // jvmti_mode!=0 | |
628 | |
629 // Noone's debuggin: Simply return. | |
630 // Pop c2i arguments (if any) off when we return. | |
631 #ifdef ASSERT | |
632 __ ld(R9_ARG7, 0, R1_SP); | |
633 __ ld(R10_ARG8, 0, R21_sender_SP); | |
634 __ cmpd(CCR0, R9_ARG7, R10_ARG8); | |
635 __ asm_assert_eq("backlink", 0x545); | |
636 #endif // ASSERT | |
637 __ mr(R1_SP, R21_sender_SP); // Cut the stack back to where the caller started. | |
638 | |
639 // And we're done. | |
640 __ blr(); | |
641 | |
642 __ bind(Lslow_path); | |
643 __ branch_to_entry(Interpreter::entry_for_kind(Interpreter::zerolocals), R11_scratch1); | |
644 __ flush(); | |
645 | |
646 return entry; | |
647 } | |
648 | |
649 // Support abs and sqrt like in compiler. | |
650 // For others we can use a normal (native) entry. | |
651 | |
652 inline bool math_entry_available(AbstractInterpreter::MethodKind kind) { | |
653 // Provide math entry with debugging on demand. | |
654 // Note: Debugging changes which code will get executed: | |
655 // Debugging or disabled InlineIntrinsics: java method will get interpreted and performs a native call. | |
656 // Not debugging and enabled InlineIntrinics: processor instruction will get used. | |
657 // Result might differ slightly due to rounding etc. | |
658 if (!InlineIntrinsics && (!FLAG_IS_ERGO(InlineIntrinsics))) return false; // Generate a vanilla entry. | |
659 | |
660 return ((kind==Interpreter::java_lang_math_sqrt && VM_Version::has_fsqrt()) || | |
661 (kind==Interpreter::java_lang_math_abs)); | |
662 } | |
663 | |
664 address TemplateInterpreterGenerator::generate_math_entry(AbstractInterpreter::MethodKind kind) { | |
665 if (!math_entry_available(kind)) { | |
666 NOT_PRODUCT(__ should_not_reach_here();) | |
667 return Interpreter::entry_for_kind(Interpreter::zerolocals); | |
668 } | |
669 | |
670 Label Lslow_path; | |
671 const Register Rjvmti_mode = R11_scratch1; | |
672 address entry = __ pc(); | |
673 | |
674 // Provide math entry with debugging on demand. | |
675 __ lwz(Rjvmti_mode, thread_(interp_only_mode)); | |
676 __ cmpwi(CCR0, Rjvmti_mode, 0); | |
677 __ bne(CCR0, Lslow_path); // jvmti_mode!=0 | |
678 | |
679 __ lfd(F1_RET, Interpreter::stackElementSize, R15_esp); | |
680 | |
681 // Pop c2i arguments (if any) off when we return. | |
682 #ifdef ASSERT | |
683 __ ld(R9_ARG7, 0, R1_SP); | |
684 __ ld(R10_ARG8, 0, R21_sender_SP); | |
685 __ cmpd(CCR0, R9_ARG7, R10_ARG8); | |
686 __ asm_assert_eq("backlink", 0x545); | |
687 #endif // ASSERT | |
688 __ mr(R1_SP, R21_sender_SP); // Cut the stack back to where the caller started. | |
689 | |
690 if (kind == Interpreter::java_lang_math_sqrt) { | |
691 __ fsqrt(F1_RET, F1_RET); | |
692 } else if (kind == Interpreter::java_lang_math_abs) { | |
693 __ fabs(F1_RET, F1_RET); | |
694 } else { | |
695 ShouldNotReachHere(); | |
696 } | |
697 | |
698 // And we're done. | |
699 __ blr(); | |
700 | |
701 // Provide slow path for JVMTI case. | |
702 __ bind(Lslow_path); | |
703 __ branch_to_entry(Interpreter::entry_for_kind(Interpreter::zerolocals), R12_scratch2); | |
704 __ flush(); | |
705 | |
706 return entry; | |
707 } | |
708 | |
709 // Interpreter stub for calling a native method. (asm interpreter) | |
710 // This sets up a somewhat different looking stack for calling the | |
711 // native method than the typical interpreter frame setup. | |
712 // | |
713 // On entry: | |
714 // R19_method - method | |
715 // R16_thread - JavaThread* | |
716 // R15_esp - intptr_t* sender tos | |
717 // | |
718 // abstract stack (grows up) | |
719 // [ IJava (caller of JNI callee) ] <-- ASP | |
720 // ... | |
721 address TemplateInterpreterGenerator::generate_native_entry(bool synchronized) { | |
722 | |
723 address entry = __ pc(); | |
724 | |
725 const bool inc_counter = UseCompiler || CountCompiledCalls; | |
726 | |
727 // ----------------------------------------------------------------------------- | |
728 // Allocate a new frame that represents the native callee (i2n frame). | |
729 // This is not a full-blown interpreter frame, but in particular, the | |
730 // following registers are valid after this: | |
731 // - R19_method | |
732 // - R18_local (points to start of argumuments to native function) | |
733 // | |
734 // abstract stack (grows up) | |
735 // [ IJava (caller of JNI callee) ] <-- ASP | |
736 // ... | |
737 | |
738 const Register signature_handler_fd = R11_scratch1; | |
739 const Register pending_exception = R0; | |
740 const Register result_handler_addr = R31; | |
741 const Register native_method_fd = R11_scratch1; | |
742 const Register access_flags = R22_tmp2; | |
743 const Register active_handles = R11_scratch1; // R26_monitor saved to state. | |
744 const Register sync_state = R12_scratch2; | |
745 const Register sync_state_addr = sync_state; // Address is dead after use. | |
746 const Register suspend_flags = R11_scratch1; | |
747 | |
748 //============================================================================= | |
749 // Allocate new frame and initialize interpreter state. | |
750 | |
751 Label exception_return; | |
752 Label exception_return_sync_check; | |
753 Label stack_overflow_return; | |
754 | |
755 // Generate new interpreter state and jump to stack_overflow_return in case of | |
756 // a stack overflow. | |
757 //generate_compute_interpreter_state(stack_overflow_return); | |
758 | |
759 Register size_of_parameters = R22_tmp2; | |
760 | |
761 generate_fixed_frame(true, size_of_parameters, noreg /* unused */); | |
762 | |
763 //============================================================================= | |
764 // Increment invocation counter. On overflow, entry to JNI method | |
765 // will be compiled. | |
766 Label invocation_counter_overflow, continue_after_compile; | |
767 if (inc_counter) { | |
768 if (synchronized) { | |
769 // Since at this point in the method invocation the exception handler | |
770 // would try to exit the monitor of synchronized methods which hasn't | |
771 // been entered yet, we set the thread local variable | |
772 // _do_not_unlock_if_synchronized to true. If any exception was thrown by | |
773 // runtime, exception handling i.e. unlock_if_synchronized_method will | |
774 // check this thread local flag. | |
775 // This flag has two effects, one is to force an unwind in the topmost | |
776 // interpreter frame and not perform an unlock while doing so. | |
777 __ li(R0, 1); | |
778 __ stb(R0, in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()), R16_thread); | |
779 } | |
780 generate_counter_incr(&invocation_counter_overflow, NULL, NULL); | |
781 | |
782 __ BIND(continue_after_compile); | |
783 // Reset the _do_not_unlock_if_synchronized flag. | |
784 if (synchronized) { | |
785 __ li(R0, 0); | |
786 __ stb(R0, in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()), R16_thread); | |
787 } | |
788 } | |
789 | |
790 // access_flags = method->access_flags(); | |
791 // Load access flags. | |
792 assert(access_flags->is_nonvolatile(), | |
793 "access_flags must be in a non-volatile register"); | |
794 // Type check. | |
795 assert(4 == sizeof(AccessFlags), "unexpected field size"); | |
796 __ lwz(access_flags, method_(access_flags)); | |
797 | |
798 // We don't want to reload R19_method and access_flags after calls | |
799 // to some helper functions. | |
800 assert(R19_method->is_nonvolatile(), | |
801 "R19_method must be a non-volatile register"); | |
802 | |
803 // Check for synchronized methods. Must happen AFTER invocation counter | |
804 // check, so method is not locked if counter overflows. | |
805 | |
806 if (synchronized) { | |
807 lock_method(access_flags, R11_scratch1, R12_scratch2, true); | |
808 | |
809 // Update monitor in state. | |
810 __ ld(R11_scratch1, 0, R1_SP); | |
811 __ std(R26_monitor, _ijava_state_neg(monitors), R11_scratch1); | |
812 } | |
813 | |
814 // jvmti/jvmpi support | |
815 __ notify_method_entry(); | |
816 | |
817 //============================================================================= | |
818 // Get and call the signature handler. | |
819 | |
820 __ ld(signature_handler_fd, method_(signature_handler)); | |
821 Label call_signature_handler; | |
822 | |
823 __ cmpdi(CCR0, signature_handler_fd, 0); | |
824 __ bne(CCR0, call_signature_handler); | |
825 | |
826 // Method has never been called. Either generate a specialized | |
827 // handler or point to the slow one. | |
828 // | |
829 // Pass parameter 'false' to avoid exception check in call_VM. | |
830 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::prepare_native_call), R19_method, false); | |
831 | |
832 // Check for an exception while looking up the target method. If we | |
833 // incurred one, bail. | |
834 __ ld(pending_exception, thread_(pending_exception)); | |
835 __ cmpdi(CCR0, pending_exception, 0); | |
836 __ bne(CCR0, exception_return_sync_check); // Has pending exception. | |
837 | |
838 // Reload signature handler, it may have been created/assigned in the meanwhile. | |
839 __ ld(signature_handler_fd, method_(signature_handler)); | |
840 __ twi_0(signature_handler_fd); // Order wrt. load of klass mirror and entry point (isync is below). | |
841 | |
842 __ BIND(call_signature_handler); | |
843 | |
844 // Before we call the signature handler we push a new frame to | |
845 // protect the interpreter frame volatile registers when we return | |
846 // from jni but before we can get back to Java. | |
847 | |
848 // First set the frame anchor while the SP/FP registers are | |
849 // convenient and the slow signature handler can use this same frame | |
850 // anchor. | |
851 | |
852 // We have a TOP_IJAVA_FRAME here, which belongs to us. | |
853 __ set_top_ijava_frame_at_SP_as_last_Java_frame(R1_SP, R12_scratch2/*tmp*/); | |
854 | |
855 // Now the interpreter frame (and its call chain) have been | |
856 // invalidated and flushed. We are now protected against eager | |
857 // being enabled in native code. Even if it goes eager the | |
858 // registers will be reloaded as clean and we will invalidate after | |
859 // the call so no spurious flush should be possible. | |
860 | |
861 // Call signature handler and pass locals address. | |
862 // | |
863 // Our signature handlers copy required arguments to the C stack | |
864 // (outgoing C args), R3_ARG1 to R10_ARG8, and FARG1 to FARG13. | |
865 __ mr(R3_ARG1, R18_locals); | |
866 __ ld(signature_handler_fd, 0, signature_handler_fd); | |
867 | |
868 __ call_stub(signature_handler_fd); | |
869 | |
870 // Remove the register parameter varargs slots we allocated in | |
871 // compute_interpreter_state. SP+16 ends up pointing to the ABI | |
872 // outgoing argument area. | |
873 // | |
874 // Not needed on PPC64. | |
875 //__ add(SP, SP, Argument::n_register_parameters*BytesPerWord); | |
876 | |
877 assert(result_handler_addr->is_nonvolatile(), "result_handler_addr must be in a non-volatile register"); | |
878 // Save across call to native method. | |
879 __ mr(result_handler_addr, R3_RET); | |
880 | |
881 __ isync(); // Acquire signature handler before trying to fetch the native entry point and klass mirror. | |
882 | |
883 // Set up fixed parameters and call the native method. | |
884 // If the method is static, get mirror into R4_ARG2. | |
885 { | |
886 Label method_is_not_static; | |
887 // Access_flags is non-volatile and still, no need to restore it. | |
888 | |
889 // Restore access flags. | |
890 __ testbitdi(CCR0, R0, access_flags, JVM_ACC_STATIC_BIT); | |
891 __ bfalse(CCR0, method_is_not_static); | |
892 | |
893 // constants = method->constants(); | |
894 __ ld(R11_scratch1, in_bytes(Method::const_offset()), R19_method); | |
895 __ ld(R11_scratch1, in_bytes(ConstMethod::constants_offset()), R11_scratch1); | |
896 // pool_holder = method->constants()->pool_holder(); | |
897 __ ld(R11_scratch1/*pool_holder*/, ConstantPool::pool_holder_offset_in_bytes(), | |
898 R11_scratch1/*constants*/); | |
899 | |
900 const int mirror_offset = in_bytes(Klass::java_mirror_offset()); | |
901 | |
902 // mirror = pool_holder->klass_part()->java_mirror(); | |
903 __ ld(R0/*mirror*/, mirror_offset, R11_scratch1/*pool_holder*/); | |
904 // state->_native_mirror = mirror; | |
905 | |
906 __ ld(R11_scratch1, 0, R1_SP); | |
907 __ std(R0/*mirror*/, _ijava_state_neg(oop_tmp), R11_scratch1); | |
908 // R4_ARG2 = &state->_oop_temp; | |
909 __ addi(R4_ARG2, R11_scratch1, _ijava_state_neg(oop_tmp)); | |
910 __ BIND(method_is_not_static); | |
911 } | |
912 | |
913 // At this point, arguments have been copied off the stack into | |
914 // their JNI positions. Oops are boxed in-place on the stack, with | |
915 // handles copied to arguments. The result handler address is in a | |
916 // register. | |
917 | |
918 // Pass JNIEnv address as first parameter. | |
919 __ addir(R3_ARG1, thread_(jni_environment)); | |
920 | |
921 // Load the native_method entry before we change the thread state. | |
922 __ ld(native_method_fd, method_(native_function)); | |
923 | |
924 //============================================================================= | |
925 // Transition from _thread_in_Java to _thread_in_native. As soon as | |
926 // we make this change the safepoint code needs to be certain that | |
927 // the last Java frame we established is good. The pc in that frame | |
928 // just needs to be near here not an actual return address. | |
929 | |
930 // We use release_store_fence to update values like the thread state, where | |
931 // we don't want the current thread to continue until all our prior memory | |
932 // accesses (including the new thread state) are visible to other threads. | |
933 __ li(R0, _thread_in_native); | |
934 __ release(); | |
935 | |
936 // TODO PPC port assert(4 == JavaThread::sz_thread_state(), "unexpected field size"); | |
937 __ stw(R0, thread_(thread_state)); | |
938 | |
939 if (UseMembar) { | |
940 __ fence(); | |
941 } | |
942 | |
943 //============================================================================= | |
944 // Call the native method. Argument registers must not have been | |
945 // overwritten since "__ call_stub(signature_handler);" (except for | |
946 // ARG1 and ARG2 for static methods). | |
947 __ call_c(native_method_fd); | |
948 | |
949 __ li(R0, 0); | |
950 __ ld(R11_scratch1, 0, R1_SP); | |
951 __ std(R3_RET, _ijava_state_neg(lresult), R11_scratch1); | |
952 __ stfd(F1_RET, _ijava_state_neg(fresult), R11_scratch1); | |
953 __ std(R0/*mirror*/, _ijava_state_neg(oop_tmp), R11_scratch1); // reset | |
954 | |
955 // Note: C++ interpreter needs the following here: | |
956 // The frame_manager_lr field, which we use for setting the last | |
957 // java frame, gets overwritten by the signature handler. Restore | |
958 // it now. | |
959 //__ get_PC_trash_LR(R11_scratch1); | |
960 //__ std(R11_scratch1, _top_ijava_frame_abi(frame_manager_lr), R1_SP); | |
961 | |
962 // Because of GC R19_method may no longer be valid. | |
963 | |
964 // Block, if necessary, before resuming in _thread_in_Java state. | |
965 // In order for GC to work, don't clear the last_Java_sp until after | |
966 // blocking. | |
967 | |
968 //============================================================================= | |
969 // Switch thread to "native transition" state before reading the | |
970 // synchronization state. This additional state is necessary | |
971 // because reading and testing the synchronization state is not | |
972 // atomic w.r.t. GC, as this scenario demonstrates: Java thread A, | |
973 // in _thread_in_native state, loads _not_synchronized and is | |
974 // preempted. VM thread changes sync state to synchronizing and | |
975 // suspends threads for GC. Thread A is resumed to finish this | |
976 // native method, but doesn't block here since it didn't see any | |
977 // synchronization in progress, and escapes. | |
978 | |
979 // We use release_store_fence to update values like the thread state, where | |
980 // we don't want the current thread to continue until all our prior memory | |
981 // accesses (including the new thread state) are visible to other threads. | |
982 __ li(R0/*thread_state*/, _thread_in_native_trans); | |
983 __ release(); | |
984 __ stw(R0/*thread_state*/, thread_(thread_state)); | |
985 if (UseMembar) { | |
986 __ fence(); | |
987 } | |
988 // Write serialization page so that the VM thread can do a pseudo remote | |
989 // membar. We use the current thread pointer to calculate a thread | |
990 // specific offset to write to within the page. This minimizes bus | |
991 // traffic due to cache line collision. | |
992 else { | |
993 __ serialize_memory(R16_thread, R11_scratch1, R12_scratch2); | |
994 } | |
995 | |
996 // Now before we return to java we must look for a current safepoint | |
997 // (a new safepoint can not start since we entered native_trans). | |
998 // We must check here because a current safepoint could be modifying | |
999 // the callers registers right this moment. | |
1000 | |
1001 // Acquire isn't strictly necessary here because of the fence, but | |
1002 // sync_state is declared to be volatile, so we do it anyway | |
1003 // (cmp-br-isync on one path, release (same as acquire on PPC64) on the other path). | |
1004 int sync_state_offs = __ load_const_optimized(sync_state_addr, SafepointSynchronize::address_of_state(), /*temp*/R0, true); | |
1005 | |
1006 // TODO PPC port assert(4 == SafepointSynchronize::sz_state(), "unexpected field size"); | |
1007 __ lwz(sync_state, sync_state_offs, sync_state_addr); | |
1008 | |
1009 // TODO PPC port assert(4 == Thread::sz_suspend_flags(), "unexpected field size"); | |
1010 __ lwz(suspend_flags, thread_(suspend_flags)); | |
1011 | |
1012 Label sync_check_done; | |
1013 Label do_safepoint; | |
1014 // No synchronization in progress nor yet synchronized. | |
1015 __ cmpwi(CCR0, sync_state, SafepointSynchronize::_not_synchronized); | |
1016 // Not suspended. | |
1017 __ cmpwi(CCR1, suspend_flags, 0); | |
1018 | |
1019 __ bne(CCR0, do_safepoint); | |
1020 __ beq(CCR1, sync_check_done); | |
1021 __ bind(do_safepoint); | |
1022 __ isync(); | |
1023 // Block. We do the call directly and leave the current | |
1024 // last_Java_frame setup undisturbed. We must save any possible | |
1025 // native result across the call. No oop is present. | |
1026 | |
1027 __ mr(R3_ARG1, R16_thread); | |
1028 __ call_c(CAST_FROM_FN_PTR(FunctionDescriptor*, JavaThread::check_special_condition_for_native_trans), | |
1029 relocInfo::none); | |
1030 | |
1031 __ bind(sync_check_done); | |
1032 | |
1033 //============================================================================= | |
1034 // <<<<<< Back in Interpreter Frame >>>>> | |
1035 | |
1036 // We are in thread_in_native_trans here and back in the normal | |
1037 // interpreter frame. We don't have to do anything special about | |
1038 // safepoints and we can switch to Java mode anytime we are ready. | |
1039 | |
1040 // Note: frame::interpreter_frame_result has a dependency on how the | |
1041 // method result is saved across the call to post_method_exit. For | |
1042 // native methods it assumes that the non-FPU/non-void result is | |
1043 // saved in _native_lresult and a FPU result in _native_fresult. If | |
1044 // this changes then the interpreter_frame_result implementation | |
1045 // will need to be updated too. | |
1046 | |
1047 // On PPC64, we have stored the result directly after the native call. | |
1048 | |
1049 //============================================================================= | |
1050 // Back in Java | |
1051 | |
1052 // We use release_store_fence to update values like the thread state, where | |
1053 // we don't want the current thread to continue until all our prior memory | |
1054 // accesses (including the new thread state) are visible to other threads. | |
1055 __ li(R0/*thread_state*/, _thread_in_Java); | |
1056 __ release(); | |
1057 __ stw(R0/*thread_state*/, thread_(thread_state)); | |
1058 if (UseMembar) { | |
1059 __ fence(); | |
1060 } | |
1061 | |
1062 __ reset_last_Java_frame(); | |
1063 | |
1064 // Jvmdi/jvmpi support. Whether we've got an exception pending or | |
1065 // not, and whether unlocking throws an exception or not, we notify | |
1066 // on native method exit. If we do have an exception, we'll end up | |
1067 // in the caller's context to handle it, so if we don't do the | |
1068 // notify here, we'll drop it on the floor. | |
1069 __ notify_method_exit(true/*native method*/, | |
1070 ilgl /*illegal state (not used for native methods)*/, | |
1071 InterpreterMacroAssembler::NotifyJVMTI, | |
1072 false /*check_exceptions*/); | |
1073 | |
1074 //============================================================================= | |
1075 // Handle exceptions | |
1076 | |
1077 if (synchronized) { | |
1078 // Don't check for exceptions since we're still in the i2n frame. Do that | |
1079 // manually afterwards. | |
1080 unlock_method(false); | |
1081 } | |
1082 | |
1083 // Reset active handles after returning from native. | |
1084 // thread->active_handles()->clear(); | |
1085 __ ld(active_handles, thread_(active_handles)); | |
1086 // TODO PPC port assert(4 == JNIHandleBlock::top_size_in_bytes(), "unexpected field size"); | |
1087 __ li(R0, 0); | |
1088 __ stw(R0, JNIHandleBlock::top_offset_in_bytes(), active_handles); | |
1089 | |
1090 Label exception_return_sync_check_already_unlocked; | |
1091 __ ld(R0/*pending_exception*/, thread_(pending_exception)); | |
1092 __ cmpdi(CCR0, R0/*pending_exception*/, 0); | |
1093 __ bne(CCR0, exception_return_sync_check_already_unlocked); | |
1094 | |
1095 //----------------------------------------------------------------------------- | |
1096 // No exception pending. | |
1097 | |
1098 // Move native method result back into proper registers and return. | |
1099 // Invoke result handler (may unbox/promote). | |
1100 __ ld(R11_scratch1, 0, R1_SP); | |
1101 __ ld(R3_RET, _ijava_state_neg(lresult), R11_scratch1); | |
1102 __ lfd(F1_RET, _ijava_state_neg(fresult), R11_scratch1); | |
1103 __ call_stub(result_handler_addr); | |
1104 | |
1105 __ merge_frames(/*top_frame_sp*/ R21_sender_SP, /*return_pc*/ R0, R11_scratch1, R12_scratch2); | |
1106 | |
1107 // Must use the return pc which was loaded from the caller's frame | |
1108 // as the VM uses return-pc-patching for deoptimization. | |
1109 __ mtlr(R0); | |
1110 __ blr(); | |
1111 | |
1112 //----------------------------------------------------------------------------- | |
1113 // An exception is pending. We call into the runtime only if the | |
1114 // caller was not interpreted. If it was interpreted the | |
1115 // interpreter will do the correct thing. If it isn't interpreted | |
1116 // (call stub/compiled code) we will change our return and continue. | |
1117 | |
1118 __ BIND(exception_return_sync_check); | |
1119 | |
1120 if (synchronized) { | |
1121 // Don't check for exceptions since we're still in the i2n frame. Do that | |
1122 // manually afterwards. | |
1123 unlock_method(false); | |
1124 } | |
1125 __ BIND(exception_return_sync_check_already_unlocked); | |
1126 | |
1127 const Register return_pc = R31; | |
1128 | |
1129 __ ld(return_pc, 0, R1_SP); | |
1130 __ ld(return_pc, _abi(lr), return_pc); | |
1131 | |
1132 // Get the address of the exception handler. | |
1133 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), | |
1134 R16_thread, | |
1135 return_pc /* return pc */); | |
1136 __ merge_frames(/*top_frame_sp*/ R21_sender_SP, noreg, R11_scratch1, R12_scratch2); | |
1137 | |
1138 // Load the PC of the the exception handler into LR. | |
1139 __ mtlr(R3_RET); | |
1140 | |
1141 // Load exception into R3_ARG1 and clear pending exception in thread. | |
1142 __ ld(R3_ARG1/*exception*/, thread_(pending_exception)); | |
1143 __ li(R4_ARG2, 0); | |
1144 __ std(R4_ARG2, thread_(pending_exception)); | |
1145 | |
1146 // Load the original return pc into R4_ARG2. | |
1147 __ mr(R4_ARG2/*issuing_pc*/, return_pc); | |
1148 | |
1149 // Return to exception handler. | |
1150 __ blr(); | |
1151 | |
1152 //============================================================================= | |
1153 // Counter overflow. | |
1154 | |
1155 if (inc_counter) { | |
1156 // Handle invocation counter overflow. | |
1157 __ bind(invocation_counter_overflow); | |
1158 | |
1159 generate_counter_overflow(continue_after_compile); | |
1160 } | |
1161 | |
1162 return entry; | |
1163 } | |
1164 | |
1165 // Generic interpreted method entry to (asm) interpreter. | |
1166 // | |
1167 address TemplateInterpreterGenerator::generate_normal_entry(bool synchronized) { | |
1168 bool inc_counter = UseCompiler || CountCompiledCalls; | |
1169 address entry = __ pc(); | |
1170 // Generate the code to allocate the interpreter stack frame. | |
1171 Register Rsize_of_parameters = R4_ARG2, // Written by generate_fixed_frame. | |
1172 Rsize_of_locals = R5_ARG3; // Written by generate_fixed_frame. | |
1173 | |
1174 generate_fixed_frame(false, Rsize_of_parameters, Rsize_of_locals); | |
1175 | |
1176 #ifdef FAST_DISPATCH | |
1177 __ unimplemented("Fast dispatch in generate_normal_entry"); | |
1178 #if 0 | |
1179 __ set((intptr_t)Interpreter::dispatch_table(), IdispatchTables); | |
1180 // Set bytecode dispatch table base. | |
1181 #endif | |
1182 #endif | |
1183 | |
1184 // -------------------------------------------------------------------------- | |
1185 // Zero out non-parameter locals. | |
1186 // Note: *Always* zero out non-parameter locals as Sparc does. It's not | |
1187 // worth to ask the flag, just do it. | |
1188 Register Rslot_addr = R6_ARG4, | |
1189 Rnum = R7_ARG5; | |
1190 Label Lno_locals, Lzero_loop; | |
1191 | |
1192 // Set up the zeroing loop. | |
1193 __ subf(Rnum, Rsize_of_parameters, Rsize_of_locals); | |
1194 __ subf(Rslot_addr, Rsize_of_parameters, R18_locals); | |
1195 __ srdi_(Rnum, Rnum, Interpreter::logStackElementSize); | |
1196 __ beq(CCR0, Lno_locals); | |
1197 __ li(R0, 0); | |
1198 __ mtctr(Rnum); | |
1199 | |
1200 // The zero locals loop. | |
1201 __ bind(Lzero_loop); | |
1202 __ std(R0, 0, Rslot_addr); | |
1203 __ addi(Rslot_addr, Rslot_addr, -Interpreter::stackElementSize); | |
1204 __ bdnz(Lzero_loop); | |
1205 | |
1206 __ bind(Lno_locals); | |
1207 | |
1208 // -------------------------------------------------------------------------- | |
1209 // Counter increment and overflow check. | |
1210 Label invocation_counter_overflow, | |
1211 profile_method, | |
1212 profile_method_continue; | |
1213 if (inc_counter || ProfileInterpreter) { | |
1214 | |
1215 Register Rdo_not_unlock_if_synchronized_addr = R11_scratch1; | |
1216 if (synchronized) { | |
1217 // Since at this point in the method invocation the exception handler | |
1218 // would try to exit the monitor of synchronized methods which hasn't | |
1219 // been entered yet, we set the thread local variable | |
1220 // _do_not_unlock_if_synchronized to true. If any exception was thrown by | |
1221 // runtime, exception handling i.e. unlock_if_synchronized_method will | |
1222 // check this thread local flag. | |
1223 // This flag has two effects, one is to force an unwind in the topmost | |
1224 // interpreter frame and not perform an unlock while doing so. | |
1225 __ li(R0, 1); | |
1226 __ stb(R0, in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()), R16_thread); | |
1227 } | |
1228 // Increment invocation counter and check for overflow. | |
1229 if (inc_counter) { | |
1230 generate_counter_incr(&invocation_counter_overflow, &profile_method, &profile_method_continue); | |
1231 } | |
1232 | |
1233 __ bind(profile_method_continue); | |
1234 | |
1235 // Reset the _do_not_unlock_if_synchronized flag. | |
1236 if (synchronized) { | |
1237 __ li(R0, 0); | |
1238 __ stb(R0, in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()), R16_thread); | |
1239 } | |
1240 } | |
1241 | |
1242 // -------------------------------------------------------------------------- | |
1243 // Locking of synchronized methods. Must happen AFTER invocation_counter | |
1244 // check and stack overflow check, so method is not locked if overflows. | |
1245 if (synchronized) { | |
1246 lock_method(R3_ARG1, R4_ARG2, R5_ARG3); | |
1247 } | |
1248 #ifdef ASSERT | |
1249 else { | |
1250 Label Lok; | |
1251 __ lwz(R0, in_bytes(Method::access_flags_offset()), R19_method); | |
1252 __ andi_(R0, R0, JVM_ACC_SYNCHRONIZED); | |
1253 __ asm_assert_eq("method needs synchronization", 0x8521); | |
1254 __ bind(Lok); | |
1255 } | |
1256 #endif // ASSERT | |
1257 | |
1258 __ verify_thread(); | |
1259 | |
1260 // -------------------------------------------------------------------------- | |
1261 // JVMTI support | |
1262 __ notify_method_entry(); | |
1263 | |
1264 // -------------------------------------------------------------------------- | |
1265 // Start executing instructions. | |
1266 __ dispatch_next(vtos); | |
1267 | |
1268 // -------------------------------------------------------------------------- | |
1269 // Out of line counter overflow and MDO creation code. | |
1270 if (ProfileInterpreter) { | |
1271 // We have decided to profile this method in the interpreter. | |
1272 __ bind(profile_method); | |
1273 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method)); | |
1274 __ set_method_data_pointer_for_bcp(); | |
1275 __ b(profile_method_continue); | |
1276 } | |
1277 | |
1278 if (inc_counter) { | |
1279 // Handle invocation counter overflow. | |
1280 __ bind(invocation_counter_overflow); | |
1281 generate_counter_overflow(profile_method_continue); | |
1282 } | |
1283 return entry; | |
1284 } | |
1285 | |
1286 // ============================================================================= | |
1287 // Entry points | |
1288 | |
1289 address AbstractInterpreterGenerator::generate_method_entry( | |
1290 AbstractInterpreter::MethodKind kind) { | |
1291 // Determine code generation flags. | |
1292 bool synchronized = false; | |
1293 address entry_point = NULL; | |
1294 | |
1295 switch (kind) { | |
1296 case Interpreter::zerolocals : break; | |
1297 case Interpreter::zerolocals_synchronized: synchronized = true; break; | |
1298 case Interpreter::native : entry_point = ((InterpreterGenerator*) this)->generate_native_entry(false); break; | |
1299 case Interpreter::native_synchronized : entry_point = ((InterpreterGenerator*) this)->generate_native_entry(true); break; | |
1300 case Interpreter::empty : entry_point = ((InterpreterGenerator*) this)->generate_empty_entry(); break; | |
1301 case Interpreter::accessor : entry_point = ((InterpreterGenerator*) this)->generate_accessor_entry(); break; | |
1302 case Interpreter::abstract : entry_point = ((InterpreterGenerator*) this)->generate_abstract_entry(); break; | |
1303 | |
1304 case Interpreter::java_lang_math_sin : // fall thru | |
1305 case Interpreter::java_lang_math_cos : // fall thru | |
1306 case Interpreter::java_lang_math_tan : // fall thru | |
1307 case Interpreter::java_lang_math_abs : // fall thru | |
1308 case Interpreter::java_lang_math_log : // fall thru | |
1309 case Interpreter::java_lang_math_log10 : // fall thru | |
1310 case Interpreter::java_lang_math_sqrt : // fall thru | |
1311 case Interpreter::java_lang_math_pow : // fall thru | |
1312 case Interpreter::java_lang_math_exp : entry_point = ((InterpreterGenerator*) this)->generate_math_entry(kind); break; | |
1313 case Interpreter::java_lang_ref_reference_get | |
1314 : entry_point = ((InterpreterGenerator*)this)->generate_Reference_get_entry(); break; | |
1315 default : ShouldNotReachHere(); break; | |
1316 } | |
1317 | |
1318 if (entry_point) { | |
1319 return entry_point; | |
1320 } | |
1321 | |
1322 return ((InterpreterGenerator*) this)->generate_normal_entry(synchronized); | |
1323 } | |
1324 | |
1325 // These should never be compiled since the interpreter will prefer | |
1326 // the compiled version to the intrinsic version. | |
1327 bool AbstractInterpreter::can_be_compiled(methodHandle m) { | |
1328 return !math_entry_available(method_kind(m)); | |
1329 } | |
1330 | |
1331 // How much stack a method activation needs in stack slots. | |
1332 // We must calc this exactly like in generate_fixed_frame. | |
1333 // Note: This returns the conservative size assuming maximum alignment. | |
1334 int AbstractInterpreter::size_top_interpreter_activation(Method* method) { | |
1335 const int max_alignment_size = 2; | |
1336 const int abi_scratch = frame::abi_reg_args_size; | |
1337 return method->max_locals() + method->max_stack() + frame::interpreter_frame_monitor_size() + max_alignment_size + abi_scratch; | |
1338 } | |
1339 | |
1340 // Fills a sceletal interpreter frame generated during deoptimizations | |
1341 // and returns the frame size in slots. | |
1342 // | |
1343 // Parameters: | |
1344 // | |
1345 // interpreter_frame == NULL: | |
1346 // Only calculate the size of an interpreter activation, no actual layout. | |
1347 // Note: This calculation must exactly parallel the frame setup | |
1348 // in TemplateInterpreter::generate_normal_entry. But it does not | |
1349 // account for the SP alignment, that might further enhance the | |
1350 // frame size, depending on FP. | |
1351 // | |
1352 // interpreter_frame != NULL: | |
1353 // set up the method, locals, and monitors. | |
1354 // The frame interpreter_frame, if not NULL, is guaranteed to be the | |
1355 // right size, as determined by a previous call to this method. | |
1356 // It is also guaranteed to be walkable even though it is in a skeletal state | |
1357 // | |
1358 // is_top_frame == true: | |
1359 // We're processing the *oldest* interpreter frame! | |
1360 // | |
1361 // pop_frame_extra_args: | |
1362 // If this is != 0 we are returning to a deoptimized frame by popping | |
1363 // off the callee frame. We want to re-execute the call that called the | |
1364 // callee interpreted, but since the return to the interpreter would pop | |
1365 // the arguments off advance the esp by dummy popframe_extra_args slots. | |
1366 // Popping off those will establish the stack layout as it was before the call. | |
1367 // | |
1368 int AbstractInterpreter::layout_activation(Method* method, | |
1369 int tempcount, | |
1370 int popframe_extra_args, | |
1371 int moncount, | |
1372 int caller_actual_parameters, | |
1373 int callee_param_count, | |
1374 int callee_locals, | |
1375 frame* caller, | |
1376 frame* interpreter_frame, | |
1377 bool is_top_frame, | |
1378 bool is_bottom_frame) { | |
1379 | |
1380 const int max_alignment_space = 2; | |
1381 const int abi_scratch = is_top_frame ? (frame::abi_reg_args_size / Interpreter::stackElementSize) : | |
1382 (frame::abi_minframe_size / Interpreter::stackElementSize) ; | |
1383 const int conservative_framesize_in_slots = | |
1384 method->max_stack() + callee_locals - callee_param_count + | |
1385 (moncount * frame::interpreter_frame_monitor_size()) + max_alignment_space + | |
1386 abi_scratch + frame::ijava_state_size / Interpreter::stackElementSize; | |
1387 | |
1388 assert(!is_top_frame || conservative_framesize_in_slots * 8 > frame::abi_reg_args_size + frame::ijava_state_size, "frame too small"); | |
1389 | |
1390 if (interpreter_frame == NULL) { | |
1391 // Since we don't know the exact alignment, we return the conservative size. | |
1392 return (conservative_framesize_in_slots & -2); | |
1393 } else { | |
1394 // Now we know our caller, calc the exact frame layout and size. | |
1395 intptr_t* locals_base = (caller->is_interpreted_frame()) ? | |
1396 caller->interpreter_frame_esp() + caller_actual_parameters : | |
1397 caller->sp() + method->max_locals() - 1 + (frame::abi_minframe_size / Interpreter::stackElementSize) ; | |
1398 | |
1399 intptr_t* monitor_base = caller->sp() - frame::ijava_state_size / Interpreter::stackElementSize ; | |
1400 intptr_t* monitor = monitor_base - (moncount * frame::interpreter_frame_monitor_size()); | |
1401 intptr_t* esp_base = monitor - 1; | |
1402 intptr_t* esp = esp_base - tempcount - popframe_extra_args; | |
1403 intptr_t* sp = (intptr_t *) (((intptr_t) (esp_base- callee_locals + callee_param_count - method->max_stack()- abi_scratch)) & -StackAlignmentInBytes); | |
1404 intptr_t* sender_sp = caller->sp() + (frame::abi_minframe_size - frame::abi_reg_args_size) / Interpreter::stackElementSize; | |
1405 intptr_t* top_frame_sp = is_top_frame ? sp : sp + (frame::abi_minframe_size - frame::abi_reg_args_size) / Interpreter::stackElementSize; | |
1406 | |
1407 interpreter_frame->interpreter_frame_set_method(method); | |
1408 interpreter_frame->interpreter_frame_set_locals(locals_base); | |
1409 interpreter_frame->interpreter_frame_set_cpcache(method->constants()->cache()); | |
1410 interpreter_frame->interpreter_frame_set_esp(esp); | |
1411 interpreter_frame->interpreter_frame_set_monitor_end((BasicObjectLock *)monitor); | |
1412 interpreter_frame->interpreter_frame_set_top_frame_sp(top_frame_sp); | |
1413 if (!is_bottom_frame) { | |
1414 interpreter_frame->interpreter_frame_set_sender_sp(sender_sp); | |
1415 } | |
1416 | |
1417 int framesize_in_slots = caller->sp() - sp; | |
1418 assert(!is_top_frame ||framesize_in_slots >= (frame::abi_reg_args_size / Interpreter::stackElementSize) + frame::ijava_state_size / Interpreter::stackElementSize, "frame too small"); | |
1419 assert(framesize_in_slots <= conservative_framesize_in_slots, "exact frame size must be smaller than the convervative size!"); | |
1420 return framesize_in_slots; | |
1421 } | |
1422 } | |
1423 | |
1424 // ============================================================================= | |
1425 // Exceptions | |
1426 | |
1427 void TemplateInterpreterGenerator::generate_throw_exception() { | |
1428 Register Rexception = R17_tos, | |
1429 Rcontinuation = R3_RET; | |
1430 | |
1431 // -------------------------------------------------------------------------- | |
1432 // Entry point if an method returns with a pending exception (rethrow). | |
1433 Interpreter::_rethrow_exception_entry = __ pc(); | |
1434 { | |
1435 __ restore_interpreter_state(R11_scratch1); // Sets R11_scratch1 = fp. | |
1436 __ ld(R12_scratch2, _ijava_state_neg(top_frame_sp), R11_scratch1); | |
1437 __ resize_frame_absolute(R12_scratch2, R11_scratch1, R0); | |
1438 | |
1439 // Compiled code destroys templateTableBase, reload. | |
1440 __ load_const_optimized(R25_templateTableBase, (address)Interpreter::dispatch_table((TosState)0), R11_scratch1); | |
1441 } | |
1442 | |
1443 // Entry point if a interpreted method throws an exception (throw). | |
1444 Interpreter::_throw_exception_entry = __ pc(); | |
1445 { | |
1446 __ mr(Rexception, R3_RET); | |
1447 | |
1448 __ verify_thread(); | |
1449 __ verify_oop(Rexception); | |
1450 | |
1451 // Expression stack must be empty before entering the VM in case of an exception. | |
1452 __ empty_expression_stack(); | |
1453 // Find exception handler address and preserve exception oop. | |
1454 // Call C routine to find handler and jump to it. | |
1455 __ call_VM(Rexception, CAST_FROM_FN_PTR(address, InterpreterRuntime::exception_handler_for_exception), Rexception); | |
1456 __ mtctr(Rcontinuation); | |
1457 // Push exception for exception handler bytecodes. | |
1458 __ push_ptr(Rexception); | |
1459 | |
1460 // Jump to exception handler (may be remove activation entry!). | |
1461 __ bctr(); | |
1462 } | |
1463 | |
1464 // If the exception is not handled in the current frame the frame is | |
1465 // removed and the exception is rethrown (i.e. exception | |
1466 // continuation is _rethrow_exception). | |
1467 // | |
1468 // Note: At this point the bci is still the bxi for the instruction | |
1469 // which caused the exception and the expression stack is | |
1470 // empty. Thus, for any VM calls at this point, GC will find a legal | |
1471 // oop map (with empty expression stack). | |
1472 | |
1473 // In current activation | |
1474 // tos: exception | |
1475 // bcp: exception bcp | |
1476 | |
1477 // -------------------------------------------------------------------------- | |
1478 // JVMTI PopFrame support | |
1479 | |
1480 Interpreter::_remove_activation_preserving_args_entry = __ pc(); | |
1481 { | |
1482 // Set the popframe_processing bit in popframe_condition indicating that we are | |
1483 // currently handling popframe, so that call_VMs that may happen later do not | |
1484 // trigger new popframe handling cycles. | |
1485 __ lwz(R11_scratch1, in_bytes(JavaThread::popframe_condition_offset()), R16_thread); | |
1486 __ ori(R11_scratch1, R11_scratch1, JavaThread::popframe_processing_bit); | |
1487 __ stw(R11_scratch1, in_bytes(JavaThread::popframe_condition_offset()), R16_thread); | |
1488 | |
1489 // Empty the expression stack, as in normal exception handling. | |
1490 __ empty_expression_stack(); | |
1491 __ unlock_if_synchronized_method(vtos, /* throw_monitor_exception */ false, /* install_monitor_exception */ false); | |
1492 | |
1493 // Check to see whether we are returning to a deoptimized frame. | |
1494 // (The PopFrame call ensures that the caller of the popped frame is | |
1495 // either interpreted or compiled and deoptimizes it if compiled.) | |
1496 // Note that we don't compare the return PC against the | |
1497 // deoptimization blob's unpack entry because of the presence of | |
1498 // adapter frames in C2. | |
1499 Label Lcaller_not_deoptimized; | |
1500 Register return_pc = R3_ARG1; | |
1501 __ ld(return_pc, 0, R1_SP); | |
1502 __ ld(return_pc, _abi(lr), return_pc); | |
1503 __ call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::interpreter_contains), return_pc); | |
1504 __ cmpdi(CCR0, R3_RET, 0); | |
1505 __ bne(CCR0, Lcaller_not_deoptimized); | |
1506 | |
1507 // The deoptimized case. | |
1508 // In this case, we can't call dispatch_next() after the frame is | |
1509 // popped, but instead must save the incoming arguments and restore | |
1510 // them after deoptimization has occurred. | |
1511 __ ld(R4_ARG2, in_bytes(Method::const_offset()), R19_method); | |
1512 __ lhz(R4_ARG2 /* number of params */, in_bytes(ConstMethod::size_of_parameters_offset()), R4_ARG2); | |
1513 __ slwi(R4_ARG2, R4_ARG2, Interpreter::logStackElementSize); | |
1514 __ addi(R5_ARG3, R18_locals, Interpreter::stackElementSize); | |
1515 __ subf(R5_ARG3, R4_ARG2, R5_ARG3); | |
1516 // Save these arguments. | |
1517 __ call_VM_leaf(CAST_FROM_FN_PTR(address, Deoptimization::popframe_preserve_args), R16_thread, R4_ARG2, R5_ARG3); | |
1518 | |
1519 // Inform deoptimization that it is responsible for restoring these arguments. | |
1520 __ load_const_optimized(R11_scratch1, JavaThread::popframe_force_deopt_reexecution_bit); | |
1521 __ stw(R11_scratch1, in_bytes(JavaThread::popframe_condition_offset()), R16_thread); | |
1522 | |
1523 // Return from the current method into the deoptimization blob. Will eventually | |
1524 // end up in the deopt interpeter entry, deoptimization prepared everything that | |
1525 // we will reexecute the call that called us. | |
1526 __ merge_frames(/*top_frame_sp*/ R21_sender_SP, /*reload return_pc*/ return_pc, R11_scratch1, R12_scratch2); | |
1527 __ mtlr(return_pc); | |
1528 __ blr(); | |
1529 | |
1530 // The non-deoptimized case. | |
1531 __ bind(Lcaller_not_deoptimized); | |
1532 | |
1533 // Clear the popframe condition flag. | |
1534 __ li(R0, 0); | |
1535 __ stw(R0, in_bytes(JavaThread::popframe_condition_offset()), R16_thread); | |
1536 | |
1537 // Get out of the current method and re-execute the call that called us. | |
1538 __ merge_frames(/*top_frame_sp*/ R21_sender_SP, /*return_pc*/ return_pc, R11_scratch1, R12_scratch2); | |
1539 __ restore_interpreter_state(R11_scratch1); | |
1540 __ ld(R12_scratch2, _ijava_state_neg(top_frame_sp), R11_scratch1); | |
1541 __ resize_frame_absolute(R12_scratch2, R11_scratch1, R0); | |
1542 __ mtlr(return_pc); | |
1543 if (ProfileInterpreter) { | |
1544 __ set_method_data_pointer_for_bcp(); | |
1545 } | |
1546 __ dispatch_next(vtos); | |
1547 } | |
1548 // end of JVMTI PopFrame support | |
1549 | |
1550 // -------------------------------------------------------------------------- | |
1551 // Remove activation exception entry. | |
1552 // This is jumped to if an interpreted method can't handle an exception itself | |
1553 // (we come from the throw/rethrow exception entry above). We're going to call | |
1554 // into the VM to find the exception handler in the caller, pop the current | |
1555 // frame and return the handler we calculated. | |
1556 Interpreter::_remove_activation_entry = __ pc(); | |
1557 { | |
1558 __ pop_ptr(Rexception); | |
1559 __ verify_thread(); | |
1560 __ verify_oop(Rexception); | |
1561 __ std(Rexception, in_bytes(JavaThread::vm_result_offset()), R16_thread); | |
1562 | |
1563 __ unlock_if_synchronized_method(vtos, /* throw_monitor_exception */ false, true); | |
1564 __ notify_method_exit(false, vtos, InterpreterMacroAssembler::SkipNotifyJVMTI, false); | |
1565 | |
1566 __ get_vm_result(Rexception); | |
1567 | |
1568 // We are done with this activation frame; find out where to go next. | |
1569 // The continuation point will be an exception handler, which expects | |
1570 // the following registers set up: | |
1571 // | |
1572 // RET: exception oop | |
1573 // ARG2: Issuing PC (see generate_exception_blob()), only used if the caller is compiled. | |
1574 | |
1575 Register return_pc = R31; // Needs to survive the runtime call. | |
1576 __ ld(return_pc, 0, R1_SP); | |
1577 __ ld(return_pc, _abi(lr), return_pc); | |
1578 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), R16_thread, return_pc); | |
1579 | |
1580 // Remove the current activation. | |
1581 __ merge_frames(/*top_frame_sp*/ R21_sender_SP, /*return_pc*/ noreg, R11_scratch1, R12_scratch2); | |
1582 | |
1583 __ mr(R4_ARG2, return_pc); | |
1584 __ mtlr(R3_RET); | |
1585 __ mr(R3_RET, Rexception); | |
1586 __ blr(); | |
1587 } | |
1588 } | |
1589 | |
1590 // JVMTI ForceEarlyReturn support. | |
1591 // Returns "in the middle" of a method with a "fake" return value. | |
1592 address TemplateInterpreterGenerator::generate_earlyret_entry_for(TosState state) { | |
1593 | |
1594 Register Rscratch1 = R11_scratch1, | |
1595 Rscratch2 = R12_scratch2; | |
1596 | |
1597 address entry = __ pc(); | |
1598 __ empty_expression_stack(); | |
1599 | |
1600 __ load_earlyret_value(state, Rscratch1); | |
1601 | |
1602 __ ld(Rscratch1, in_bytes(JavaThread::jvmti_thread_state_offset()), R16_thread); | |
1603 // Clear the earlyret state. | |
1604 __ li(R0, 0); | |
1605 __ stw(R0, in_bytes(JvmtiThreadState::earlyret_state_offset()), Rscratch1); | |
1606 | |
1607 __ remove_activation(state, false, false); | |
1608 // Copied from TemplateTable::_return. | |
1609 // Restoration of lr done by remove_activation. | |
1610 switch (state) { | |
1611 case ltos: | |
1612 case btos: | |
1613 case ctos: | |
1614 case stos: | |
1615 case atos: | |
1616 case itos: __ mr(R3_RET, R17_tos); break; | |
1617 case ftos: | |
1618 case dtos: __ fmr(F1_RET, F15_ftos); break; | |
1619 case vtos: // This might be a constructor. Final fields (and volatile fields on PPC64) need | |
1620 // to get visible before the reference to the object gets stored anywhere. | |
1621 __ membar(Assembler::StoreStore); break; | |
1622 default : ShouldNotReachHere(); | |
1623 } | |
1624 __ blr(); | |
1625 | |
1626 return entry; | |
1627 } // end of ForceEarlyReturn support | |
1628 | |
1629 //----------------------------------------------------------------------------- | |
1630 // Helper for vtos entry point generation | |
1631 | |
1632 void TemplateInterpreterGenerator::set_vtos_entry_points(Template* t, | |
1633 address& bep, | |
1634 address& cep, | |
1635 address& sep, | |
1636 address& aep, | |
1637 address& iep, | |
1638 address& lep, | |
1639 address& fep, | |
1640 address& dep, | |
1641 address& vep) { | |
1642 assert(t->is_valid() && t->tos_in() == vtos, "illegal template"); | |
1643 Label L; | |
1644 | |
1645 aep = __ pc(); __ push_ptr(); __ b(L); | |
1646 fep = __ pc(); __ push_f(); __ b(L); | |
1647 dep = __ pc(); __ push_d(); __ b(L); | |
1648 lep = __ pc(); __ push_l(); __ b(L); | |
1649 __ align(32, 12, 24); // align L | |
1650 bep = cep = sep = | |
1651 iep = __ pc(); __ push_i(); | |
1652 vep = __ pc(); | |
1653 __ bind(L); | |
1654 generate_and_dispatch(t); | |
1655 } | |
1656 | |
1657 //----------------------------------------------------------------------------- | |
1658 // Generation of individual instructions | |
1659 | |
1660 // helpers for generate_and_dispatch | |
1661 | |
1662 InterpreterGenerator::InterpreterGenerator(StubQueue* code) | |
1663 : TemplateInterpreterGenerator(code) { | |
1664 generate_all(); // Down here so it can be "virtual". | |
1665 } | |
1666 | |
1667 //----------------------------------------------------------------------------- | |
1668 | |
1669 // Non-product code | |
1670 #ifndef PRODUCT | |
1671 address TemplateInterpreterGenerator::generate_trace_code(TosState state) { | |
1672 //__ flush_bundle(); | |
1673 address entry = __ pc(); | |
1674 | |
1675 char *bname = NULL; | |
1676 uint tsize = 0; | |
1677 switch(state) { | |
1678 case ftos: | |
1679 bname = "trace_code_ftos {"; | |
1680 tsize = 2; | |
1681 break; | |
1682 case btos: | |
1683 bname = "trace_code_btos {"; | |
1684 tsize = 2; | |
1685 break; | |
1686 case ctos: | |
1687 bname = "trace_code_ctos {"; | |
1688 tsize = 2; | |
1689 break; | |
1690 case stos: | |
1691 bname = "trace_code_stos {"; | |
1692 tsize = 2; | |
1693 break; | |
1694 case itos: | |
1695 bname = "trace_code_itos {"; | |
1696 tsize = 2; | |
1697 break; | |
1698 case ltos: | |
1699 bname = "trace_code_ltos {"; | |
1700 tsize = 3; | |
1701 break; | |
1702 case atos: | |
1703 bname = "trace_code_atos {"; | |
1704 tsize = 2; | |
1705 break; | |
1706 case vtos: | |
1707 // Note: In case of vtos, the topmost of stack value could be a int or doubl | |
1708 // In case of a double (2 slots) we won't see the 2nd stack value. | |
1709 // Maybe we simply should print the topmost 3 stack slots to cope with the problem. | |
1710 bname = "trace_code_vtos {"; | |
1711 tsize = 2; | |
1712 | |
1713 break; | |
1714 case dtos: | |
1715 bname = "trace_code_dtos {"; | |
1716 tsize = 3; | |
1717 break; | |
1718 default: | |
1719 ShouldNotReachHere(); | |
1720 } | |
1721 BLOCK_COMMENT(bname); | |
1722 | |
1723 // Support short-cut for TraceBytecodesAt. | |
1724 // Don't call into the VM if we don't want to trace to speed up things. | |
1725 Label Lskip_vm_call; | |
1726 if (TraceBytecodesAt > 0 && TraceBytecodesAt < max_intx) { | |
1727 int offs1 = __ load_const_optimized(R11_scratch1, (address) &TraceBytecodesAt, R0, true); | |
1728 int offs2 = __ load_const_optimized(R12_scratch2, (address) &BytecodeCounter::_counter_value, R0, true); | |
1729 __ ld(R11_scratch1, offs1, R11_scratch1); | |
1730 __ lwa(R12_scratch2, offs2, R12_scratch2); | |
1731 __ cmpd(CCR0, R12_scratch2, R11_scratch1); | |
1732 __ blt(CCR0, Lskip_vm_call); | |
1733 } | |
1734 | |
1735 __ push(state); | |
1736 // Load 2 topmost expression stack values. | |
1737 __ ld(R6_ARG4, tsize*Interpreter::stackElementSize, R15_esp); | |
1738 __ ld(R5_ARG3, Interpreter::stackElementSize, R15_esp); | |
1739 __ mflr(R31); | |
1740 __ call_VM(noreg, CAST_FROM_FN_PTR(address, SharedRuntime::trace_bytecode), /* unused */ R4_ARG2, R5_ARG3, R6_ARG4, false); | |
1741 __ mtlr(R31); | |
1742 __ pop(state); | |
1743 | |
1744 if (TraceBytecodesAt > 0 && TraceBytecodesAt < max_intx) { | |
1745 __ bind(Lskip_vm_call); | |
1746 } | |
1747 __ blr(); | |
1748 BLOCK_COMMENT("} trace_code"); | |
1749 return entry; | |
1750 } | |
1751 | |
1752 void TemplateInterpreterGenerator::count_bytecode() { | |
1753 int offs = __ load_const_optimized(R11_scratch1, (address) &BytecodeCounter::_counter_value, R12_scratch2, true); | |
1754 __ lwz(R12_scratch2, offs, R11_scratch1); | |
1755 __ addi(R12_scratch2, R12_scratch2, 1); | |
1756 __ stw(R12_scratch2, offs, R11_scratch1); | |
1757 } | |
1758 | |
1759 void TemplateInterpreterGenerator::histogram_bytecode(Template* t) { | |
1760 int offs = __ load_const_optimized(R11_scratch1, (address) &BytecodeHistogram::_counters[t->bytecode()], R12_scratch2, true); | |
1761 __ lwz(R12_scratch2, offs, R11_scratch1); | |
1762 __ addi(R12_scratch2, R12_scratch2, 1); | |
1763 __ stw(R12_scratch2, offs, R11_scratch1); | |
1764 } | |
1765 | |
1766 void TemplateInterpreterGenerator::histogram_bytecode_pair(Template* t) { | |
1767 const Register addr = R11_scratch1, | |
1768 tmp = R12_scratch2; | |
1769 // Get index, shift out old bytecode, bring in new bytecode, and store it. | |
1770 // _index = (_index >> log2_number_of_codes) | | |
1771 // (bytecode << log2_number_of_codes); | |
1772 int offs1 = __ load_const_optimized(addr, (address)&BytecodePairHistogram::_index, tmp, true); | |
1773 __ lwz(tmp, offs1, addr); | |
1774 __ srwi(tmp, tmp, BytecodePairHistogram::log2_number_of_codes); | |
1775 __ ori(tmp, tmp, ((int) t->bytecode()) << BytecodePairHistogram::log2_number_of_codes); | |
1776 __ stw(tmp, offs1, addr); | |
1777 | |
1778 // Bump bucket contents. | |
1779 // _counters[_index] ++; | |
1780 int offs2 = __ load_const_optimized(addr, (address)&BytecodePairHistogram::_counters, R0, true); | |
1781 __ sldi(tmp, tmp, LogBytesPerInt); | |
1782 __ add(addr, tmp, addr); | |
1783 __ lwz(tmp, offs2, addr); | |
1784 __ addi(tmp, tmp, 1); | |
1785 __ stw(tmp, offs2, addr); | |
1786 } | |
1787 | |
1788 void TemplateInterpreterGenerator::trace_bytecode(Template* t) { | |
1789 // Call a little run-time stub to avoid blow-up for each bytecode. | |
1790 // The run-time runtime saves the right registers, depending on | |
1791 // the tosca in-state for the given template. | |
1792 | |
1793 assert(Interpreter::trace_code(t->tos_in()) != NULL, | |
1794 "entry must have been generated"); | |
1795 | |
1796 // Note: we destroy LR here. | |
1797 __ bl(Interpreter::trace_code(t->tos_in())); | |
1798 } | |
1799 | |
1800 void TemplateInterpreterGenerator::stop_interpreter_at() { | |
1801 Label L; | |
1802 int offs1 = __ load_const_optimized(R11_scratch1, (address) &StopInterpreterAt, R0, true); | |
1803 int offs2 = __ load_const_optimized(R12_scratch2, (address) &BytecodeCounter::_counter_value, R0, true); | |
1804 __ ld(R11_scratch1, offs1, R11_scratch1); | |
1805 __ lwa(R12_scratch2, offs2, R12_scratch2); | |
1806 __ cmpd(CCR0, R12_scratch2, R11_scratch1); | |
1807 __ bne(CCR0, L); | |
1808 __ illtrap(); | |
1809 __ bind(L); | |
1810 } | |
1811 | |
1812 #endif // !PRODUCT | |
1813 #endif // !CC_INTERP |