Mercurial > hg > truffle
annotate src/cpu/x86/vm/templateInterpreter_x86_32.cpp @ 9378:0e661acc3b4a
Fix null pointer exception in if reordering.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Sun, 28 Apr 2013 01:01:00 +0200 |
parents | e961c11b85fe |
children | aeaca88565e6 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
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26 #include "asm/macroAssembler.hpp" |
1972 | 27 #include "interpreter/bytecodeHistogram.hpp" |
28 #include "interpreter/interpreter.hpp" | |
29 #include "interpreter/interpreterGenerator.hpp" | |
30 #include "interpreter/interpreterRuntime.hpp" | |
31 #include "interpreter/templateTable.hpp" | |
32 #include "oops/arrayOop.hpp" | |
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33 #include "oops/methodData.hpp" |
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34 #include "oops/method.hpp" |
1972 | 35 #include "oops/oop.inline.hpp" |
36 #include "prims/jvmtiExport.hpp" | |
37 #include "prims/jvmtiThreadState.hpp" | |
38 #include "runtime/arguments.hpp" | |
39 #include "runtime/deoptimization.hpp" | |
40 #include "runtime/frame.inline.hpp" | |
41 #include "runtime/sharedRuntime.hpp" | |
42 #include "runtime/stubRoutines.hpp" | |
43 #include "runtime/synchronizer.hpp" | |
44 #include "runtime/timer.hpp" | |
45 #include "runtime/vframeArray.hpp" | |
46 #include "utilities/debug.hpp" | |
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47 #include "utilities/macros.hpp" |
0 | 48 |
49 #define __ _masm-> | |
50 | |
51 | |
52 #ifndef CC_INTERP | |
53 const int method_offset = frame::interpreter_frame_method_offset * wordSize; | |
54 const int bci_offset = frame::interpreter_frame_bcx_offset * wordSize; | |
55 const int locals_offset = frame::interpreter_frame_locals_offset * wordSize; | |
56 | |
57 //------------------------------------------------------------------------------------------------------------------------ | |
58 | |
59 address TemplateInterpreterGenerator::generate_StackOverflowError_handler() { | |
60 address entry = __ pc(); | |
61 | |
62 // Note: There should be a minimal interpreter frame set up when stack | |
63 // overflow occurs since we check explicitly for it now. | |
64 // | |
65 #ifdef ASSERT | |
66 { Label L; | |
304 | 67 __ lea(rax, Address(rbp, |
0 | 68 frame::interpreter_frame_monitor_block_top_offset * wordSize)); |
304 | 69 __ cmpptr(rax, rsp); // rax, = maximal rsp for current rbp, |
0 | 70 // (stack grows negative) |
71 __ jcc(Assembler::aboveEqual, L); // check if frame is complete | |
72 __ stop ("interpreter frame not set up"); | |
73 __ bind(L); | |
74 } | |
75 #endif // ASSERT | |
76 // Restore bcp under the assumption that the current frame is still | |
77 // interpreted | |
78 __ restore_bcp(); | |
79 | |
80 // expression stack must be empty before entering the VM if an exception | |
81 // happened | |
82 __ empty_expression_stack(); | |
83 __ empty_FPU_stack(); | |
84 // throw exception | |
85 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_StackOverflowError)); | |
86 return entry; | |
87 } | |
88 | |
89 address TemplateInterpreterGenerator::generate_ArrayIndexOutOfBounds_handler(const char* name) { | |
90 address entry = __ pc(); | |
91 // expression stack must be empty before entering the VM if an exception happened | |
92 __ empty_expression_stack(); | |
93 __ empty_FPU_stack(); | |
94 // setup parameters | |
95 // ??? convention: expect aberrant index in register rbx, | |
96 __ lea(rax, ExternalAddress((address)name)); | |
97 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException), rax, rbx); | |
98 return entry; | |
99 } | |
100 | |
101 address TemplateInterpreterGenerator::generate_ClassCastException_handler() { | |
102 address entry = __ pc(); | |
103 // object is at TOS | |
304 | 104 __ pop(rax); |
0 | 105 // expression stack must be empty before entering the VM if an exception |
106 // happened | |
107 __ empty_expression_stack(); | |
108 __ empty_FPU_stack(); | |
109 __ call_VM(noreg, | |
110 CAST_FROM_FN_PTR(address, | |
111 InterpreterRuntime::throw_ClassCastException), | |
112 rax); | |
113 return entry; | |
114 } | |
115 | |
116 address TemplateInterpreterGenerator::generate_exception_handler_common(const char* name, const char* message, bool pass_oop) { | |
117 assert(!pass_oop || message == NULL, "either oop or message but not both"); | |
118 address entry = __ pc(); | |
119 if (pass_oop) { | |
120 // object is at TOS | |
304 | 121 __ pop(rbx); |
0 | 122 } |
123 // expression stack must be empty before entering the VM if an exception happened | |
124 __ empty_expression_stack(); | |
125 __ empty_FPU_stack(); | |
126 // setup parameters | |
127 __ lea(rax, ExternalAddress((address)name)); | |
128 if (pass_oop) { | |
129 __ call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::create_klass_exception), rax, rbx); | |
130 } else { | |
131 if (message != NULL) { | |
132 __ lea(rbx, ExternalAddress((address)message)); | |
133 } else { | |
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134 __ movptr(rbx, NULL_WORD); |
0 | 135 } |
136 __ call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::create_exception), rax, rbx); | |
137 } | |
138 // throw exception | |
139 __ jump(ExternalAddress(Interpreter::throw_exception_entry())); | |
140 return entry; | |
141 } | |
142 | |
143 | |
144 address TemplateInterpreterGenerator::generate_continuation_for(TosState state) { | |
145 address entry = __ pc(); | |
146 // NULL last_sp until next java call | |
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147 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD); |
0 | 148 __ dispatch_next(state); |
149 return entry; | |
150 } | |
151 | |
152 | |
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153 address TemplateInterpreterGenerator::generate_return_entry_for(TosState state, int step) { |
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154 TosState incoming_state = state; |
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155 address entry = __ pc(); |
0 | 156 |
157 #ifdef COMPILER2 | |
158 // The FPU stack is clean if UseSSE >= 2 but must be cleaned in other cases | |
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159 if ((incoming_state == ftos && UseSSE < 1) || (incoming_state == dtos && UseSSE < 2)) { |
0 | 160 for (int i = 1; i < 8; i++) { |
161 __ ffree(i); | |
162 } | |
163 } else if (UseSSE < 2) { | |
164 __ empty_FPU_stack(); | |
165 } | |
166 #endif | |
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167 if ((incoming_state == ftos && UseSSE < 1) || (incoming_state == dtos && UseSSE < 2)) { |
0 | 168 __ MacroAssembler::verify_FPU(1, "generate_return_entry_for compiled"); |
169 } else { | |
170 __ MacroAssembler::verify_FPU(0, "generate_return_entry_for compiled"); | |
171 } | |
172 | |
173 // In SSE mode, interpreter returns FP results in xmm0 but they need | |
174 // to end up back on the FPU so it can operate on them. | |
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175 if (incoming_state == ftos && UseSSE >= 1) { |
304 | 176 __ subptr(rsp, wordSize); |
0 | 177 __ movflt(Address(rsp, 0), xmm0); |
178 __ fld_s(Address(rsp, 0)); | |
304 | 179 __ addptr(rsp, wordSize); |
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180 } else if (incoming_state == dtos && UseSSE >= 2) { |
304 | 181 __ subptr(rsp, 2*wordSize); |
0 | 182 __ movdbl(Address(rsp, 0), xmm0); |
183 __ fld_d(Address(rsp, 0)); | |
304 | 184 __ addptr(rsp, 2*wordSize); |
0 | 185 } |
186 | |
187 __ MacroAssembler::verify_FPU(state == ftos || state == dtos ? 1 : 0, "generate_return_entry_for in interpreter"); | |
188 | |
189 // Restore stack bottom in case i2c adjusted stack | |
304 | 190 __ movptr(rsp, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize)); |
0 | 191 // and NULL it as marker that rsp is now tos until next java call |
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192 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD); |
0 | 193 |
194 __ restore_bcp(); | |
195 __ restore_locals(); | |
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196 |
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197 Label L_got_cache, L_giant_index; |
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198 if (EnableInvokeDynamic) { |
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199 __ cmpb(Address(rsi, 0), Bytecodes::_invokedynamic); |
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200 __ jcc(Assembler::equal, L_giant_index); |
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201 } |
1565 | 202 __ get_cache_and_index_at_bcp(rbx, rcx, 1, sizeof(u2)); |
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203 __ bind(L_got_cache); |
0 | 204 __ movl(rbx, Address(rbx, rcx, |
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205 Address::times_ptr, ConstantPoolCache::base_offset() + |
0 | 206 ConstantPoolCacheEntry::flags_offset())); |
304 | 207 __ andptr(rbx, 0xFF); |
208 __ lea(rsp, Address(rsp, rbx, Interpreter::stackElementScale())); | |
0 | 209 __ dispatch_next(state, step); |
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210 |
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211 // out of the main line of code... |
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212 if (EnableInvokeDynamic) { |
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213 __ bind(L_giant_index); |
1565 | 214 __ get_cache_and_index_at_bcp(rbx, rcx, 1, sizeof(u4)); |
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215 __ jmp(L_got_cache); |
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216 } |
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217 |
0 | 218 return entry; |
219 } | |
220 | |
221 | |
222 address TemplateInterpreterGenerator::generate_deopt_entry_for(TosState state, int step) { | |
223 address entry = __ pc(); | |
224 | |
225 // In SSE mode, FP results are in xmm0 | |
226 if (state == ftos && UseSSE > 0) { | |
304 | 227 __ subptr(rsp, wordSize); |
0 | 228 __ movflt(Address(rsp, 0), xmm0); |
229 __ fld_s(Address(rsp, 0)); | |
304 | 230 __ addptr(rsp, wordSize); |
0 | 231 } else if (state == dtos && UseSSE >= 2) { |
304 | 232 __ subptr(rsp, 2*wordSize); |
0 | 233 __ movdbl(Address(rsp, 0), xmm0); |
234 __ fld_d(Address(rsp, 0)); | |
304 | 235 __ addptr(rsp, 2*wordSize); |
0 | 236 } |
237 | |
238 __ MacroAssembler::verify_FPU(state == ftos || state == dtos ? 1 : 0, "generate_deopt_entry_for in interpreter"); | |
239 | |
240 // The stack is not extended by deopt but we must NULL last_sp as this | |
241 // entry is like a "return". | |
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242 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD); |
0 | 243 __ restore_bcp(); |
244 __ restore_locals(); | |
245 // handle exceptions | |
246 { Label L; | |
247 const Register thread = rcx; | |
248 __ get_thread(thread); | |
304 | 249 __ cmpptr(Address(thread, Thread::pending_exception_offset()), (int32_t)NULL_WORD); |
0 | 250 __ jcc(Assembler::zero, L); |
251 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_pending_exception)); | |
252 __ should_not_reach_here(); | |
253 __ bind(L); | |
254 } | |
255 __ dispatch_next(state, step); | |
256 return entry; | |
257 } | |
258 | |
259 | |
260 int AbstractInterpreter::BasicType_as_index(BasicType type) { | |
261 int i = 0; | |
262 switch (type) { | |
263 case T_BOOLEAN: i = 0; break; | |
264 case T_CHAR : i = 1; break; | |
265 case T_BYTE : i = 2; break; | |
266 case T_SHORT : i = 3; break; | |
267 case T_INT : // fall through | |
268 case T_LONG : // fall through | |
269 case T_VOID : i = 4; break; | |
270 case T_FLOAT : i = 5; break; // have to treat float and double separately for SSE | |
271 case T_DOUBLE : i = 6; break; | |
272 case T_OBJECT : // fall through | |
273 case T_ARRAY : i = 7; break; | |
274 default : ShouldNotReachHere(); | |
275 } | |
276 assert(0 <= i && i < AbstractInterpreter::number_of_result_handlers, "index out of bounds"); | |
277 return i; | |
278 } | |
279 | |
280 | |
281 address TemplateInterpreterGenerator::generate_result_handler_for(BasicType type) { | |
282 address entry = __ pc(); | |
283 switch (type) { | |
284 case T_BOOLEAN: __ c2bool(rax); break; | |
304 | 285 case T_CHAR : __ andptr(rax, 0xFFFF); break; |
0 | 286 case T_BYTE : __ sign_extend_byte (rax); break; |
287 case T_SHORT : __ sign_extend_short(rax); break; | |
288 case T_INT : /* nothing to do */ break; | |
289 case T_DOUBLE : | |
290 case T_FLOAT : | |
291 { const Register t = InterpreterRuntime::SignatureHandlerGenerator::temp(); | |
304 | 292 __ pop(t); // remove return address first |
0 | 293 // Must return a result for interpreter or compiler. In SSE |
294 // mode, results are returned in xmm0 and the FPU stack must | |
295 // be empty. | |
296 if (type == T_FLOAT && UseSSE >= 1) { | |
297 // Load ST0 | |
298 __ fld_d(Address(rsp, 0)); | |
299 // Store as float and empty fpu stack | |
300 __ fstp_s(Address(rsp, 0)); | |
301 // and reload | |
302 __ movflt(xmm0, Address(rsp, 0)); | |
303 } else if (type == T_DOUBLE && UseSSE >= 2 ) { | |
304 __ movdbl(xmm0, Address(rsp, 0)); | |
305 } else { | |
306 // restore ST0 | |
307 __ fld_d(Address(rsp, 0)); | |
308 } | |
309 // and pop the temp | |
304 | 310 __ addptr(rsp, 2 * wordSize); |
311 __ push(t); // restore return address | |
0 | 312 } |
313 break; | |
314 case T_OBJECT : | |
315 // retrieve result from frame | |
304 | 316 __ movptr(rax, Address(rbp, frame::interpreter_frame_oop_temp_offset*wordSize)); |
0 | 317 // and verify it |
318 __ verify_oop(rax); | |
319 break; | |
320 default : ShouldNotReachHere(); | |
321 } | |
322 __ ret(0); // return from result handler | |
323 return entry; | |
324 } | |
325 | |
326 address TemplateInterpreterGenerator::generate_safept_entry_for(TosState state, address runtime_entry) { | |
327 address entry = __ pc(); | |
328 __ push(state); | |
329 __ call_VM(noreg, runtime_entry); | |
330 __ dispatch_via(vtos, Interpreter::_normal_table.table_for(vtos)); | |
331 return entry; | |
332 } | |
333 | |
334 | |
335 // Helpers for commoning out cases in the various type of method entries. | |
336 // | |
337 | |
338 // increment invocation count & check for overflow | |
339 // | |
340 // Note: checking for negative value instead of overflow | |
341 // so we have a 'sticky' overflow test | |
342 // | |
343 // rbx,: method | |
344 // rcx: invocation counter | |
345 // | |
346 void InterpreterGenerator::generate_counter_incr(Label* overflow, Label* profile_method, Label* profile_method_continue) { | |
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347 const Address invocation_counter(rbx, in_bytes(Method::invocation_counter_offset()) + |
1783 | 348 in_bytes(InvocationCounter::counter_offset())); |
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349 // Note: In tiered we increment either counters in Method* or in MDO depending if we're profiling or not. |
1783 | 350 if (TieredCompilation) { |
351 int increment = InvocationCounter::count_increment; | |
352 int mask = ((1 << Tier0InvokeNotifyFreqLog) - 1) << InvocationCounter::count_shift; | |
353 Label no_mdo, done; | |
354 if (ProfileInterpreter) { | |
355 // Are we profiling? | |
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356 __ movptr(rax, Address(rbx, Method::method_data_offset())); |
1783 | 357 __ testptr(rax, rax); |
358 __ jccb(Assembler::zero, no_mdo); | |
359 // Increment counter in the MDO | |
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360 const Address mdo_invocation_counter(rax, in_bytes(MethodData::invocation_counter_offset()) + |
1783 | 361 in_bytes(InvocationCounter::counter_offset())); |
362 __ increment_mask_and_jump(mdo_invocation_counter, increment, mask, rcx, false, Assembler::zero, overflow); | |
363 __ jmpb(done); | |
364 } | |
365 __ bind(no_mdo); | |
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366 // Increment counter in Method* (we don't need to load it, it's in rcx). |
1783 | 367 __ increment_mask_and_jump(invocation_counter, increment, mask, rcx, true, Assembler::zero, overflow); |
368 __ bind(done); | |
369 } else { | |
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370 const Address backedge_counter (rbx, Method::backedge_counter_offset() + |
1783 | 371 InvocationCounter::counter_offset()); |
0 | 372 |
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373 if (ProfileInterpreter) { // %%% Merge this into MethodData* |
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374 __ incrementl(Address(rbx,Method::interpreter_invocation_counter_offset())); |
1783 | 375 } |
376 // Update standard invocation counters | |
377 __ movl(rax, backedge_counter); // load backedge counter | |
378 | |
379 __ incrementl(rcx, InvocationCounter::count_increment); | |
380 __ andl(rax, InvocationCounter::count_mask_value); // mask out the status bits | |
381 | |
382 __ movl(invocation_counter, rcx); // save invocation count | |
383 __ addl(rcx, rax); // add both counters | |
0 | 384 |
1783 | 385 // profile_method is non-null only for interpreted method so |
386 // profile_method != NULL == !native_call | |
387 // BytecodeInterpreter only calls for native so code is elided. | |
388 | |
389 if (ProfileInterpreter && profile_method != NULL) { | |
390 // Test to see if we should create a method data oop | |
391 __ cmp32(rcx, | |
392 ExternalAddress((address)&InvocationCounter::InterpreterProfileLimit)); | |
393 __ jcc(Assembler::less, *profile_method_continue); | |
394 | |
395 // if no method data exists, go to profile_method | |
396 __ test_method_data_pointer(rax, *profile_method); | |
397 } | |
398 | |
0 | 399 __ cmp32(rcx, |
1783 | 400 ExternalAddress((address)&InvocationCounter::InterpreterInvocationLimit)); |
401 __ jcc(Assembler::aboveEqual, *overflow); | |
0 | 402 } |
403 } | |
404 | |
405 void InterpreterGenerator::generate_counter_overflow(Label* do_continue) { | |
406 | |
407 // Asm interpreter on entry | |
408 // rdi - locals | |
409 // rsi - bcp | |
410 // rbx, - method | |
411 // rdx - cpool | |
412 // rbp, - interpreter frame | |
413 | |
414 // C++ interpreter on entry | |
415 // rsi - new interpreter state pointer | |
416 // rbp - interpreter frame pointer | |
417 // rbx - method | |
418 | |
419 // On return (i.e. jump to entry_point) [ back to invocation of interpreter ] | |
420 // rbx, - method | |
421 // rcx - rcvr (assuming there is one) | |
422 // top of stack return address of interpreter caller | |
423 // rsp - sender_sp | |
424 | |
425 // C++ interpreter only | |
426 // rsi - previous interpreter state pointer | |
427 | |
428 // InterpreterRuntime::frequency_counter_overflow takes one argument | |
429 // indicating if the counter overflow occurs at a backwards branch (non-NULL bcp). | |
430 // The call returns the address of the verified entry point for the method or NULL | |
431 // if the compilation did not complete (either went background or bailed out). | |
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432 __ movptr(rax, (intptr_t)false); |
0 | 433 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::frequency_counter_overflow), rax); |
434 | |
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435 __ movptr(rbx, Address(rbp, method_offset)); // restore Method* |
0 | 436 |
437 // Preserve invariant that rsi/rdi contain bcp/locals of sender frame | |
438 // and jump to the interpreted entry. | |
439 __ jmp(*do_continue, relocInfo::none); | |
440 | |
441 } | |
442 | |
443 void InterpreterGenerator::generate_stack_overflow_check(void) { | |
444 // see if we've got enough room on the stack for locals plus overhead. | |
445 // the expression stack grows down incrementally, so the normal guard | |
446 // page mechanism will work for that. | |
447 // | |
448 // Registers live on entry: | |
449 // | |
450 // Asm interpreter | |
451 // rdx: number of additional locals this frame needs (what we must check) | |
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452 // rbx,: Method* |
0 | 453 |
454 // destroyed on exit | |
455 // rax, | |
456 | |
457 // NOTE: since the additional locals are also always pushed (wasn't obvious in | |
458 // generate_method_entry) so the guard should work for them too. | |
459 // | |
460 | |
461 // monitor entry size: see picture of stack set (generate_method_entry) and frame_x86.hpp | |
462 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize; | |
463 | |
464 // total overhead size: entry_size + (saved rbp, thru expr stack bottom). | |
465 // be sure to change this if you add/subtract anything to/from the overhead area | |
466 const int overhead_size = -(frame::interpreter_frame_initial_sp_offset*wordSize) + entry_size; | |
467 | |
468 const int page_size = os::vm_page_size(); | |
469 | |
470 Label after_frame_check; | |
471 | |
472 // see if the frame is greater than one page in size. If so, | |
473 // then we need to verify there is enough stack space remaining | |
474 // for the additional locals. | |
1506 | 475 __ cmpl(rdx, (page_size - overhead_size)/Interpreter::stackElementSize); |
0 | 476 __ jcc(Assembler::belowEqual, after_frame_check); |
477 | |
478 // compute rsp as if this were going to be the last frame on | |
479 // the stack before the red zone | |
480 | |
481 Label after_frame_check_pop; | |
482 | |
304 | 483 __ push(rsi); |
0 | 484 |
485 const Register thread = rsi; | |
486 | |
487 __ get_thread(thread); | |
488 | |
489 const Address stack_base(thread, Thread::stack_base_offset()); | |
490 const Address stack_size(thread, Thread::stack_size_offset()); | |
491 | |
492 // locals + overhead, in bytes | |
304 | 493 __ lea(rax, Address(noreg, rdx, Interpreter::stackElementScale(), overhead_size)); |
0 | 494 |
495 #ifdef ASSERT | |
496 Label stack_base_okay, stack_size_okay; | |
497 // verify that thread stack base is non-zero | |
304 | 498 __ cmpptr(stack_base, (int32_t)NULL_WORD); |
0 | 499 __ jcc(Assembler::notEqual, stack_base_okay); |
500 __ stop("stack base is zero"); | |
501 __ bind(stack_base_okay); | |
502 // verify that thread stack size is non-zero | |
304 | 503 __ cmpptr(stack_size, 0); |
0 | 504 __ jcc(Assembler::notEqual, stack_size_okay); |
505 __ stop("stack size is zero"); | |
506 __ bind(stack_size_okay); | |
507 #endif | |
508 | |
509 // Add stack base to locals and subtract stack size | |
304 | 510 __ addptr(rax, stack_base); |
511 __ subptr(rax, stack_size); | |
0 | 512 |
513 // Use the maximum number of pages we might bang. | |
514 const int max_pages = StackShadowPages > (StackRedPages+StackYellowPages) ? StackShadowPages : | |
515 (StackRedPages+StackYellowPages); | |
304 | 516 __ addptr(rax, max_pages * page_size); |
0 | 517 |
518 // check against the current stack bottom | |
304 | 519 __ cmpptr(rsp, rax); |
0 | 520 __ jcc(Assembler::above, after_frame_check_pop); |
521 | |
304 | 522 __ pop(rsi); // get saved bcp / (c++ prev state ). |
0 | 523 |
4743 | 524 // Restore sender's sp as SP. This is necessary if the sender's |
525 // frame is an extended compiled frame (see gen_c2i_adapter()) | |
526 // and safer anyway in case of JSR292 adaptations. | |
0 | 527 |
4743 | 528 __ pop(rax); // return address must be moved if SP is changed |
529 __ mov(rsp, rsi); | |
530 __ push(rax); | |
531 | |
532 // Note: the restored frame is not necessarily interpreted. | |
533 // Use the shared runtime version of the StackOverflowError. | |
534 assert(StubRoutines::throw_StackOverflowError_entry() != NULL, "stub not yet generated"); | |
535 __ jump(ExternalAddress(StubRoutines::throw_StackOverflowError_entry())); | |
0 | 536 // all done with frame size check |
537 __ bind(after_frame_check_pop); | |
304 | 538 __ pop(rsi); |
0 | 539 |
540 __ bind(after_frame_check); | |
541 } | |
542 | |
543 // Allocate monitor and lock method (asm interpreter) | |
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544 // rbx, - Method* |
0 | 545 // |
546 void InterpreterGenerator::lock_method(void) { | |
547 // synchronize method | |
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548 const Address access_flags (rbx, Method::access_flags_offset()); |
0 | 549 const Address monitor_block_top (rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize); |
550 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize; | |
551 | |
552 #ifdef ASSERT | |
553 { Label L; | |
554 __ movl(rax, access_flags); | |
555 __ testl(rax, JVM_ACC_SYNCHRONIZED); | |
556 __ jcc(Assembler::notZero, L); | |
557 __ stop("method doesn't need synchronization"); | |
558 __ bind(L); | |
559 } | |
560 #endif // ASSERT | |
561 // get synchronization object | |
562 { Label done; | |
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563 const int mirror_offset = in_bytes(Klass::java_mirror_offset()); |
0 | 564 __ movl(rax, access_flags); |
565 __ testl(rax, JVM_ACC_STATIC); | |
304 | 566 __ movptr(rax, Address(rdi, Interpreter::local_offset_in_bytes(0))); // get receiver (assume this is frequent case) |
0 | 567 __ jcc(Assembler::zero, done); |
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568 __ movptr(rax, Address(rbx, Method::const_offset())); |
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569 __ movptr(rax, Address(rax, ConstMethod::constants_offset())); |
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570 __ movptr(rax, Address(rax, ConstantPool::pool_holder_offset_in_bytes())); |
304 | 571 __ movptr(rax, Address(rax, mirror_offset)); |
0 | 572 __ bind(done); |
573 } | |
574 // add space for monitor & lock | |
304 | 575 __ subptr(rsp, entry_size); // add space for a monitor entry |
576 __ movptr(monitor_block_top, rsp); // set new monitor block top | |
577 __ movptr(Address(rsp, BasicObjectLock::obj_offset_in_bytes()), rax); // store object | |
578 __ mov(rdx, rsp); // object address | |
0 | 579 __ lock_object(rdx); |
580 } | |
581 | |
582 // | |
583 // Generate a fixed interpreter frame. This is identical setup for interpreted methods | |
584 // and for native methods hence the shared code. | |
585 | |
586 void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call) { | |
587 // initialize fixed part of activation frame | |
304 | 588 __ push(rax); // save return address |
0 | 589 __ enter(); // save old & set new rbp, |
590 | |
591 | |
304 | 592 __ push(rsi); // set sender sp |
593 __ push((int32_t)NULL_WORD); // leave last_sp as null | |
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594 __ movptr(rsi, Address(rbx,Method::const_offset())); // get ConstMethod* |
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595 __ lea(rsi, Address(rsi,ConstMethod::codes_offset())); // get codebase |
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596 __ push(rbx); // save Method* |
0 | 597 if (ProfileInterpreter) { |
598 Label method_data_continue; | |
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599 __ movptr(rdx, Address(rbx, in_bytes(Method::method_data_offset()))); |
304 | 600 __ testptr(rdx, rdx); |
0 | 601 __ jcc(Assembler::zero, method_data_continue); |
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602 __ addptr(rdx, in_bytes(MethodData::data_offset())); |
0 | 603 __ bind(method_data_continue); |
304 | 604 __ push(rdx); // set the mdp (method data pointer) |
0 | 605 } else { |
304 | 606 __ push(0); |
0 | 607 } |
608 | |
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609 __ movptr(rdx, Address(rbx, Method::const_offset())); |
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610 __ movptr(rdx, Address(rdx, ConstMethod::constants_offset())); |
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611 __ movptr(rdx, Address(rdx, ConstantPool::cache_offset_in_bytes())); |
304 | 612 __ push(rdx); // set constant pool cache |
613 __ push(rdi); // set locals pointer | |
0 | 614 if (native_call) { |
304 | 615 __ push(0); // no bcp |
0 | 616 } else { |
304 | 617 __ push(rsi); // set bcp |
0 | 618 } |
304 | 619 __ push(0); // reserve word for pointer to expression stack bottom |
620 __ movptr(Address(rsp, 0), rsp); // set expression stack bottom | |
0 | 621 } |
622 | |
623 // End of helpers | |
624 | |
625 // | |
626 // Various method entries | |
627 //------------------------------------------------------------------------------------------------------------------------ | |
628 // | |
629 // | |
630 | |
631 // Call an accessor method (assuming it is resolved, otherwise drop into vanilla (slow path) entry | |
632 | |
633 address InterpreterGenerator::generate_accessor_entry(void) { | |
634 | |
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635 // rbx,: Method* |
0 | 636 // rcx: receiver (preserve for slow entry into asm interpreter) |
637 | |
638 // rsi: senderSP must preserved for slow path, set SP to it on fast path | |
639 | |
640 address entry_point = __ pc(); | |
641 Label xreturn_path; | |
642 | |
643 // do fastpath for resolved accessor methods | |
644 if (UseFastAccessorMethods) { | |
645 Label slow_path; | |
646 // If we need a safepoint check, generate full interpreter entry. | |
647 ExternalAddress state(SafepointSynchronize::address_of_state()); | |
648 __ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()), | |
649 SafepointSynchronize::_not_synchronized); | |
650 | |
651 __ jcc(Assembler::notEqual, slow_path); | |
652 // ASM/C++ Interpreter | |
653 // Code: _aload_0, _(i|a)getfield, _(i|a)return or any rewrites thereof; parameter size = 1 | |
654 // Note: We can only use this code if the getfield has been resolved | |
655 // and if we don't have a null-pointer exception => check for | |
656 // these conditions first and use slow path if necessary. | |
657 // rbx,: method | |
658 // rcx: receiver | |
304 | 659 __ movptr(rax, Address(rsp, wordSize)); |
0 | 660 |
661 // check if local 0 != NULL and read field | |
304 | 662 __ testptr(rax, rax); |
0 | 663 __ jcc(Assembler::zero, slow_path); |
664 | |
665 // read first instruction word and extract bytecode @ 1 and index @ 2 | |
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666 __ movptr(rdx, Address(rbx, Method::const_offset())); |
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667 __ movptr(rdi, Address(rdx, ConstMethod::constants_offset())); |
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668 __ movl(rdx, Address(rdx, ConstMethod::codes_offset())); |
0 | 669 // Shift codes right to get the index on the right. |
670 // The bytecode fetched looks like <index><0xb4><0x2a> | |
671 __ shrl(rdx, 2*BitsPerByte); | |
672 __ shll(rdx, exact_log2(in_words(ConstantPoolCacheEntry::size()))); | |
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673 __ movptr(rdi, Address(rdi, ConstantPool::cache_offset_in_bytes())); |
0 | 674 |
675 // rax,: local 0 | |
676 // rbx,: method | |
677 // rcx: receiver - do not destroy since it is needed for slow path! | |
678 // rcx: scratch | |
679 // rdx: constant pool cache index | |
680 // rdi: constant pool cache | |
681 // rsi: sender sp | |
682 | |
683 // check if getfield has been resolved and read constant pool cache entry | |
684 // check the validity of the cache entry by testing whether _indices field | |
685 // contains Bytecode::_getfield in b1 byte. | |
686 assert(in_words(ConstantPoolCacheEntry::size()) == 4, "adjust shift below"); | |
687 __ movl(rcx, | |
688 Address(rdi, | |
689 rdx, | |
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690 Address::times_ptr, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::indices_offset())); |
0 | 691 __ shrl(rcx, 2*BitsPerByte); |
692 __ andl(rcx, 0xFF); | |
693 __ cmpl(rcx, Bytecodes::_getfield); | |
694 __ jcc(Assembler::notEqual, slow_path); | |
695 | |
696 // Note: constant pool entry is not valid before bytecode is resolved | |
304 | 697 __ movptr(rcx, |
698 Address(rdi, | |
699 rdx, | |
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700 Address::times_ptr, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::f2_offset())); |
0 | 701 __ movl(rdx, |
702 Address(rdi, | |
703 rdx, | |
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704 Address::times_ptr, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::flags_offset())); |
0 | 705 |
706 Label notByte, notShort, notChar; | |
707 const Address field_address (rax, rcx, Address::times_1); | |
708 | |
709 // Need to differentiate between igetfield, agetfield, bgetfield etc. | |
710 // because they are different sizes. | |
711 // Use the type from the constant pool cache | |
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712 __ shrl(rdx, ConstantPoolCacheEntry::tos_state_shift); |
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713 // Make sure we don't need to mask rdx after the above shift |
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714 ConstantPoolCacheEntry::verify_tos_state_shift(); |
0 | 715 __ cmpl(rdx, btos); |
716 __ jcc(Assembler::notEqual, notByte); | |
717 __ load_signed_byte(rax, field_address); | |
718 __ jmp(xreturn_path); | |
719 | |
720 __ bind(notByte); | |
721 __ cmpl(rdx, stos); | |
722 __ jcc(Assembler::notEqual, notShort); | |
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723 __ load_signed_short(rax, field_address); |
0 | 724 __ jmp(xreturn_path); |
725 | |
726 __ bind(notShort); | |
727 __ cmpl(rdx, ctos); | |
728 __ jcc(Assembler::notEqual, notChar); | |
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729 __ load_unsigned_short(rax, field_address); |
0 | 730 __ jmp(xreturn_path); |
731 | |
732 __ bind(notChar); | |
733 #ifdef ASSERT | |
734 Label okay; | |
735 __ cmpl(rdx, atos); | |
736 __ jcc(Assembler::equal, okay); | |
737 __ cmpl(rdx, itos); | |
738 __ jcc(Assembler::equal, okay); | |
739 __ stop("what type is this?"); | |
740 __ bind(okay); | |
741 #endif // ASSERT | |
742 // All the rest are a 32 bit wordsize | |
304 | 743 // This is ok for now. Since fast accessors should be going away |
744 __ movptr(rax, field_address); | |
0 | 745 |
746 __ bind(xreturn_path); | |
747 | |
748 // _ireturn/_areturn | |
304 | 749 __ pop(rdi); // get return address |
750 __ mov(rsp, rsi); // set sp to sender sp | |
0 | 751 __ jmp(rdi); |
752 | |
753 // generate a vanilla interpreter entry as the slow path | |
754 __ bind(slow_path); | |
755 | |
756 (void) generate_normal_entry(false); | |
757 return entry_point; | |
758 } | |
759 return NULL; | |
760 | |
761 } | |
762 | |
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763 // Method entry for java.lang.ref.Reference.get. |
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764 address InterpreterGenerator::generate_Reference_get_entry(void) { |
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765 #if INCLUDE_ALL_GCS |
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766 // Code: _aload_0, _getfield, _areturn |
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767 // parameter size = 1 |
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768 // |
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769 // The code that gets generated by this routine is split into 2 parts: |
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770 // 1. The "intrinsified" code for G1 (or any SATB based GC), |
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771 // 2. The slow path - which is an expansion of the regular method entry. |
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772 // |
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773 // Notes:- |
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774 // * In the G1 code we do not check whether we need to block for |
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775 // a safepoint. If G1 is enabled then we must execute the specialized |
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776 // code for Reference.get (except when the Reference object is null) |
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777 // so that we can log the value in the referent field with an SATB |
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778 // update buffer. |
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779 // If the code for the getfield template is modified so that the |
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780 // G1 pre-barrier code is executed when the current method is |
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781 // Reference.get() then going through the normal method entry |
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782 // will be fine. |
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783 // * The G1 code below can, however, check the receiver object (the instance |
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784 // of java.lang.Reference) and jump to the slow path if null. If the |
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785 // Reference object is null then we obviously cannot fetch the referent |
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786 // and so we don't need to call the G1 pre-barrier. Thus we can use the |
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787 // regular method entry code to generate the NPE. |
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788 // |
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789 // This code is based on generate_accessor_enty. |
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790 |
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791 // rbx,: Method* |
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792 // rcx: receiver (preserve for slow entry into asm interpreter) |
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793 |
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794 // rsi: senderSP must preserved for slow path, set SP to it on fast path |
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795 |
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796 address entry = __ pc(); |
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797 |
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798 const int referent_offset = java_lang_ref_Reference::referent_offset; |
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799 guarantee(referent_offset > 0, "referent offset not initialized"); |
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800 |
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801 if (UseG1GC) { |
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802 Label slow_path; |
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803 |
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804 // Check if local 0 != NULL |
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805 // If the receiver is null then it is OK to jump to the slow path. |
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806 __ movptr(rax, Address(rsp, wordSize)); |
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807 __ testptr(rax, rax); |
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808 __ jcc(Assembler::zero, slow_path); |
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809 |
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810 // rax: local 0 (must be preserved across the G1 barrier call) |
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811 // |
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812 // rbx: method (at this point it's scratch) |
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813 // rcx: receiver (at this point it's scratch) |
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814 // rdx: scratch |
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815 // rdi: scratch |
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816 // |
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817 // rsi: sender sp |
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818 |
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819 // Preserve the sender sp in case the pre-barrier |
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820 // calls the runtime |
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821 __ push(rsi); |
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822 |
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823 // Load the value of the referent field. |
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824 const Address field_address(rax, referent_offset); |
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825 __ movptr(rax, field_address); |
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826 |
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827 // Generate the G1 pre-barrier code to log the value of |
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828 // the referent field in an SATB buffer. |
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829 __ get_thread(rcx); |
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830 __ g1_write_barrier_pre(noreg /* obj */, |
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831 rax /* pre_val */, |
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832 rcx /* thread */, |
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833 rbx /* tmp */, |
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834 true /* tosca_save */, |
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835 true /* expand_call */); |
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836 |
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837 // _areturn |
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838 __ pop(rsi); // get sender sp |
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839 __ pop(rdi); // get return address |
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840 __ mov(rsp, rsi); // set sp to sender sp |
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841 __ jmp(rdi); |
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842 |
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843 __ bind(slow_path); |
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844 (void) generate_normal_entry(false); |
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845 |
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846 return entry; |
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847 } |
8001
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848 #endif // INCLUDE_ALL_GCS |
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849 |
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850 // If G1 is not enabled then attempt to go through the accessor entry point |
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851 // Reference.get is an accessor |
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852 return generate_accessor_entry(); |
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853 } |
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854 |
0 | 855 // |
856 // Interpreter stub for calling a native method. (asm interpreter) | |
857 // This sets up a somewhat different looking stack for calling the native method | |
858 // than the typical interpreter frame setup. | |
859 // | |
860 | |
861 address InterpreterGenerator::generate_native_entry(bool synchronized) { | |
862 // determine code generation flags | |
863 bool inc_counter = UseCompiler || CountCompiledCalls; | |
864 | |
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865 // rbx,: Method* |
0 | 866 // rsi: sender sp |
867 // rsi: previous interpreter state (C++ interpreter) must preserve | |
868 address entry_point = __ pc(); | |
869 | |
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870 const Address constMethod (rbx, Method::const_offset()); |
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871 const Address invocation_counter(rbx, Method::invocation_counter_offset() + InvocationCounter::counter_offset()); |
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872 const Address access_flags (rbx, Method::access_flags_offset()); |
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873 const Address size_of_parameters(rcx, ConstMethod::size_of_parameters_offset()); |
0 | 874 |
875 // get parameter size (always needed) | |
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876 __ movptr(rcx, constMethod); |
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877 __ load_unsigned_short(rcx, size_of_parameters); |
0 | 878 |
879 // native calls don't need the stack size check since they have no expression stack | |
880 // and the arguments are already on the stack and we only add a handful of words | |
881 // to the stack | |
882 | |
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883 // rbx,: Method* |
0 | 884 // rcx: size of parameters |
885 // rsi: sender sp | |
886 | |
304 | 887 __ pop(rax); // get return address |
0 | 888 // for natives the size of locals is zero |
889 | |
890 // compute beginning of parameters (rdi) | |
304 | 891 __ lea(rdi, Address(rsp, rcx, Interpreter::stackElementScale(), -wordSize)); |
0 | 892 |
893 | |
894 // add 2 zero-initialized slots for native calls | |
895 // NULL result handler | |
304 | 896 __ push((int32_t)NULL_WORD); |
0 | 897 // NULL oop temp (mirror or jni oop result) |
304 | 898 __ push((int32_t)NULL_WORD); |
0 | 899 |
900 if (inc_counter) __ movl(rcx, invocation_counter); // (pre-)fetch invocation count | |
901 // initialize fixed part of activation frame | |
902 | |
903 generate_fixed_frame(true); | |
904 | |
905 // make sure method is native & not abstract | |
906 #ifdef ASSERT | |
907 __ movl(rax, access_flags); | |
908 { | |
909 Label L; | |
910 __ testl(rax, JVM_ACC_NATIVE); | |
911 __ jcc(Assembler::notZero, L); | |
912 __ stop("tried to execute non-native method as native"); | |
913 __ bind(L); | |
914 } | |
915 { Label L; | |
916 __ testl(rax, JVM_ACC_ABSTRACT); | |
917 __ jcc(Assembler::zero, L); | |
918 __ stop("tried to execute abstract method in interpreter"); | |
919 __ bind(L); | |
920 } | |
921 #endif | |
922 | |
923 // Since at this point in the method invocation the exception handler | |
924 // would try to exit the monitor of synchronized methods which hasn't | |
925 // been entered yet, we set the thread local variable | |
926 // _do_not_unlock_if_synchronized to true. The remove_activation will | |
927 // check this flag. | |
928 | |
929 __ get_thread(rax); | |
930 const Address do_not_unlock_if_synchronized(rax, | |
931 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset())); | |
932 __ movbool(do_not_unlock_if_synchronized, true); | |
933 | |
934 // increment invocation count & check for overflow | |
935 Label invocation_counter_overflow; | |
936 if (inc_counter) { | |
937 generate_counter_incr(&invocation_counter_overflow, NULL, NULL); | |
938 } | |
939 | |
940 Label continue_after_compile; | |
941 __ bind(continue_after_compile); | |
942 | |
943 bang_stack_shadow_pages(true); | |
944 | |
945 // reset the _do_not_unlock_if_synchronized flag | |
946 __ get_thread(rax); | |
947 __ movbool(do_not_unlock_if_synchronized, false); | |
948 | |
949 // check for synchronized methods | |
950 // Must happen AFTER invocation_counter check and stack overflow check, | |
951 // so method is not locked if overflows. | |
952 // | |
953 if (synchronized) { | |
954 lock_method(); | |
955 } else { | |
956 // no synchronization necessary | |
957 #ifdef ASSERT | |
958 { Label L; | |
959 __ movl(rax, access_flags); | |
960 __ testl(rax, JVM_ACC_SYNCHRONIZED); | |
961 __ jcc(Assembler::zero, L); | |
962 __ stop("method needs synchronization"); | |
963 __ bind(L); | |
964 } | |
965 #endif | |
966 } | |
967 | |
968 // start execution | |
969 #ifdef ASSERT | |
970 { Label L; | |
971 const Address monitor_block_top (rbp, | |
972 frame::interpreter_frame_monitor_block_top_offset * wordSize); | |
304 | 973 __ movptr(rax, monitor_block_top); |
974 __ cmpptr(rax, rsp); | |
0 | 975 __ jcc(Assembler::equal, L); |
976 __ stop("broken stack frame setup in interpreter"); | |
977 __ bind(L); | |
978 } | |
979 #endif | |
980 | |
981 // jvmti/dtrace support | |
982 __ notify_method_entry(); | |
983 | |
984 // work registers | |
985 const Register method = rbx; | |
986 const Register thread = rdi; | |
987 const Register t = rcx; | |
988 | |
989 // allocate space for parameters | |
990 __ get_method(method); | |
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991 __ movptr(t, Address(method, Method::const_offset())); |
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992 __ load_unsigned_short(t, Address(t, ConstMethod::size_of_parameters_offset())); |
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993 |
1506 | 994 __ shlptr(t, Interpreter::logStackElementSize); |
304 | 995 __ addptr(t, 2*wordSize); // allocate two more slots for JNIEnv and possible mirror |
996 __ subptr(rsp, t); | |
997 __ andptr(rsp, -(StackAlignmentInBytes)); // gcc needs 16 byte aligned stacks to do XMM intrinsics | |
0 | 998 |
999 // get signature handler | |
1000 { Label L; | |
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1001 __ movptr(t, Address(method, Method::signature_handler_offset())); |
304 | 1002 __ testptr(t, t); |
0 | 1003 __ jcc(Assembler::notZero, L); |
1004 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::prepare_native_call), method); | |
1005 __ get_method(method); | |
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1006 __ movptr(t, Address(method, Method::signature_handler_offset())); |
0 | 1007 __ bind(L); |
1008 } | |
1009 | |
1010 // call signature handler | |
1011 assert(InterpreterRuntime::SignatureHandlerGenerator::from() == rdi, "adjust this code"); | |
1012 assert(InterpreterRuntime::SignatureHandlerGenerator::to () == rsp, "adjust this code"); | |
1013 assert(InterpreterRuntime::SignatureHandlerGenerator::temp() == t , "adjust this code"); | |
1014 // The generated handlers do not touch RBX (the method oop). | |
1015 // However, large signatures cannot be cached and are generated | |
1016 // each time here. The slow-path generator will blow RBX | |
1017 // sometime, so we must reload it after the call. | |
1018 __ call(t); | |
1019 __ get_method(method); // slow path call blows RBX on DevStudio 5.0 | |
1020 | |
1021 // result handler is in rax, | |
1022 // set result handler | |
304 | 1023 __ movptr(Address(rbp, frame::interpreter_frame_result_handler_offset*wordSize), rax); |
0 | 1024 |
1025 // pass mirror handle if static call | |
1026 { Label L; | |
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1027 const int mirror_offset = in_bytes(Klass::java_mirror_offset()); |
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1028 __ movl(t, Address(method, Method::access_flags_offset())); |
0 | 1029 __ testl(t, JVM_ACC_STATIC); |
1030 __ jcc(Assembler::zero, L); | |
1031 // get mirror | |
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1032 __ movptr(t, Address(method, Method:: const_offset())); |
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1033 __ movptr(t, Address(t, ConstMethod::constants_offset())); |
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1034 __ movptr(t, Address(t, ConstantPool::pool_holder_offset_in_bytes())); |
304 | 1035 __ movptr(t, Address(t, mirror_offset)); |
0 | 1036 // copy mirror into activation frame |
304 | 1037 __ movptr(Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize), t); |
0 | 1038 // pass handle to mirror |
304 | 1039 __ lea(t, Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize)); |
1040 __ movptr(Address(rsp, wordSize), t); | |
0 | 1041 __ bind(L); |
1042 } | |
1043 | |
1044 // get native function entry point | |
1045 { Label L; | |
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1046 __ movptr(rax, Address(method, Method::native_function_offset())); |
0 | 1047 ExternalAddress unsatisfied(SharedRuntime::native_method_throw_unsatisfied_link_error_entry()); |
304 | 1048 __ cmpptr(rax, unsatisfied.addr()); |
0 | 1049 __ jcc(Assembler::notEqual, L); |
1050 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::prepare_native_call), method); | |
1051 __ get_method(method); | |
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1052 __ movptr(rax, Address(method, Method::native_function_offset())); |
0 | 1053 __ bind(L); |
1054 } | |
1055 | |
1056 // pass JNIEnv | |
1057 __ get_thread(thread); | |
304 | 1058 __ lea(t, Address(thread, JavaThread::jni_environment_offset())); |
1059 __ movptr(Address(rsp, 0), t); | |
0 | 1060 |
1061 // set_last_Java_frame_before_call | |
1062 // It is enough that the pc() | |
1063 // points into the right code segment. It does not have to be the correct return pc. | |
1064 __ set_last_Java_frame(thread, noreg, rbp, __ pc()); | |
1065 | |
1066 // change thread state | |
1067 #ifdef ASSERT | |
1068 { Label L; | |
1069 __ movl(t, Address(thread, JavaThread::thread_state_offset())); | |
1070 __ cmpl(t, _thread_in_Java); | |
1071 __ jcc(Assembler::equal, L); | |
1072 __ stop("Wrong thread state in native stub"); | |
1073 __ bind(L); | |
1074 } | |
1075 #endif | |
1076 | |
1077 // Change state to native | |
1078 __ movl(Address(thread, JavaThread::thread_state_offset()), _thread_in_native); | |
1079 __ call(rax); | |
1080 | |
1081 // result potentially in rdx:rax or ST0 | |
1082 | |
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1083 // Verify or restore cpu control state after JNI call |
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1084 __ restore_cpu_control_state_after_jni(); |
0 | 1085 |
1086 // save potential result in ST(0) & rdx:rax | |
1087 // (if result handler is the T_FLOAT or T_DOUBLE handler, result must be in ST0 - | |
1088 // the check is necessary to avoid potential Intel FPU overflow problems by saving/restoring 'empty' FPU registers) | |
1089 // It is safe to do this push because state is _thread_in_native and return address will be found | |
1090 // via _last_native_pc and not via _last_jave_sp | |
1091 | |
1092 // NOTE: the order of theses push(es) is known to frame::interpreter_frame_result. | |
1093 // If the order changes or anything else is added to the stack the code in | |
1094 // interpreter_frame_result will have to be changed. | |
1095 | |
1096 { Label L; | |
1097 Label push_double; | |
1098 ExternalAddress float_handler(AbstractInterpreter::result_handler(T_FLOAT)); | |
1099 ExternalAddress double_handler(AbstractInterpreter::result_handler(T_DOUBLE)); | |
1100 __ cmpptr(Address(rbp, (frame::interpreter_frame_oop_temp_offset + 1)*wordSize), | |
1101 float_handler.addr()); | |
1102 __ jcc(Assembler::equal, push_double); | |
1103 __ cmpptr(Address(rbp, (frame::interpreter_frame_oop_temp_offset + 1)*wordSize), | |
1104 double_handler.addr()); | |
1105 __ jcc(Assembler::notEqual, L); | |
1106 __ bind(push_double); | |
1107 __ push(dtos); | |
1108 __ bind(L); | |
1109 } | |
1110 __ push(ltos); | |
1111 | |
1112 // change thread state | |
1113 __ get_thread(thread); | |
1114 __ movl(Address(thread, JavaThread::thread_state_offset()), _thread_in_native_trans); | |
1115 if(os::is_MP()) { | |
1116 if (UseMembar) { | |
304 | 1117 // Force this write out before the read below |
1118 __ membar(Assembler::Membar_mask_bits( | |
1119 Assembler::LoadLoad | Assembler::LoadStore | | |
1120 Assembler::StoreLoad | Assembler::StoreStore)); | |
0 | 1121 } else { |
1122 // Write serialization page so VM thread can do a pseudo remote membar. | |
1123 // We use the current thread pointer to calculate a thread specific | |
1124 // offset to write to within the page. This minimizes bus traffic | |
1125 // due to cache line collision. | |
1126 __ serialize_memory(thread, rcx); | |
1127 } | |
1128 } | |
1129 | |
1130 if (AlwaysRestoreFPU) { | |
1131 // Make sure the control word is correct. | |
1132 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_std())); | |
1133 } | |
1134 | |
1135 // check for safepoint operation in progress and/or pending suspend requests | |
1136 { Label Continue; | |
1137 | |
1138 __ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()), | |
1139 SafepointSynchronize::_not_synchronized); | |
1140 | |
1141 Label L; | |
1142 __ jcc(Assembler::notEqual, L); | |
1143 __ cmpl(Address(thread, JavaThread::suspend_flags_offset()), 0); | |
1144 __ jcc(Assembler::equal, Continue); | |
1145 __ bind(L); | |
1146 | |
1147 // Don't use call_VM as it will see a possible pending exception and forward it | |
1148 // and never return here preventing us from clearing _last_native_pc down below. | |
1149 // Also can't use call_VM_leaf either as it will check to see if rsi & rdi are | |
1150 // preserved and correspond to the bcp/locals pointers. So we do a runtime call | |
1151 // by hand. | |
1152 // | |
304 | 1153 __ push(thread); |
0 | 1154 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, |
1155 JavaThread::check_special_condition_for_native_trans))); | |
1156 __ increment(rsp, wordSize); | |
1157 __ get_thread(thread); | |
1158 | |
1159 __ bind(Continue); | |
1160 } | |
1161 | |
1162 // change thread state | |
1163 __ movl(Address(thread, JavaThread::thread_state_offset()), _thread_in_Java); | |
1164 | |
1165 __ reset_last_Java_frame(thread, true, true); | |
1166 | |
1167 // reset handle block | |
304 | 1168 __ movptr(t, Address(thread, JavaThread::active_handles_offset())); |
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1169 __ movptr(Address(t, JNIHandleBlock::top_offset_in_bytes()), NULL_WORD); |
0 | 1170 |
1171 // If result was an oop then unbox and save it in the frame | |
1172 { Label L; | |
1173 Label no_oop, store_result; | |
1174 ExternalAddress handler(AbstractInterpreter::result_handler(T_OBJECT)); | |
1175 __ cmpptr(Address(rbp, frame::interpreter_frame_result_handler_offset*wordSize), | |
1176 handler.addr()); | |
1177 __ jcc(Assembler::notEqual, no_oop); | |
304 | 1178 __ cmpptr(Address(rsp, 0), (int32_t)NULL_WORD); |
0 | 1179 __ pop(ltos); |
304 | 1180 __ testptr(rax, rax); |
0 | 1181 __ jcc(Assembler::zero, store_result); |
1182 // unbox | |
304 | 1183 __ movptr(rax, Address(rax, 0)); |
0 | 1184 __ bind(store_result); |
304 | 1185 __ movptr(Address(rbp, (frame::interpreter_frame_oop_temp_offset)*wordSize), rax); |
0 | 1186 // keep stack depth as expected by pushing oop which will eventually be discarded |
1187 __ push(ltos); | |
1188 __ bind(no_oop); | |
1189 } | |
1190 | |
1191 { | |
1192 Label no_reguard; | |
1193 __ cmpl(Address(thread, JavaThread::stack_guard_state_offset()), JavaThread::stack_guard_yellow_disabled); | |
1194 __ jcc(Assembler::notEqual, no_reguard); | |
1195 | |
304 | 1196 __ pusha(); |
0 | 1197 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages))); |
304 | 1198 __ popa(); |
0 | 1199 |
1200 __ bind(no_reguard); | |
1201 } | |
1202 | |
1203 // restore rsi to have legal interpreter frame, | |
1204 // i.e., bci == 0 <=> rsi == code_base() | |
1205 // Can't call_VM until bcp is within reasonable. | |
1206 __ get_method(method); // method is junk from thread_in_native to now. | |
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1207 __ movptr(rsi, Address(method,Method::const_offset())); // get ConstMethod* |
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1208 __ lea(rsi, Address(rsi,ConstMethod::codes_offset())); // get codebase |
0 | 1209 |
1210 // handle exceptions (exception handling will handle unlocking!) | |
1211 { Label L; | |
304 | 1212 __ cmpptr(Address(thread, Thread::pending_exception_offset()), (int32_t)NULL_WORD); |
0 | 1213 __ jcc(Assembler::zero, L); |
1214 // Note: At some point we may want to unify this with the code used in call_VM_base(); | |
1215 // i.e., we should use the StubRoutines::forward_exception code. For now this | |
1216 // doesn't work here because the rsp is not correctly set at this point. | |
1217 __ MacroAssembler::call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_pending_exception)); | |
1218 __ should_not_reach_here(); | |
1219 __ bind(L); | |
1220 } | |
1221 | |
1222 // do unlocking if necessary | |
1223 { Label L; | |
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1224 __ movl(t, Address(method, Method::access_flags_offset())); |
0 | 1225 __ testl(t, JVM_ACC_SYNCHRONIZED); |
1226 __ jcc(Assembler::zero, L); | |
1227 // the code below should be shared with interpreter macro assembler implementation | |
1228 { Label unlock; | |
1229 // BasicObjectLock will be first in list, since this is a synchronized method. However, need | |
1230 // to check that the object has not been unlocked by an explicit monitorexit bytecode. | |
1231 const Address monitor(rbp, frame::interpreter_frame_initial_sp_offset * wordSize - (int)sizeof(BasicObjectLock)); | |
1232 | |
304 | 1233 __ lea(rdx, monitor); // address of first monitor |
0 | 1234 |
304 | 1235 __ movptr(t, Address(rdx, BasicObjectLock::obj_offset_in_bytes())); |
1236 __ testptr(t, t); | |
0 | 1237 __ jcc(Assembler::notZero, unlock); |
1238 | |
1239 // Entry already unlocked, need to throw exception | |
1240 __ MacroAssembler::call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_illegal_monitor_state_exception)); | |
1241 __ should_not_reach_here(); | |
1242 | |
1243 __ bind(unlock); | |
1244 __ unlock_object(rdx); | |
1245 } | |
1246 __ bind(L); | |
1247 } | |
1248 | |
1249 // jvmti/dtrace support | |
1250 // Note: This must happen _after_ handling/throwing any exceptions since | |
1251 // the exception handler code notifies the runtime of method exits | |
1252 // too. If this happens before, method entry/exit notifications are | |
1253 // not properly paired (was bug - gri 11/22/99). | |
1254 __ notify_method_exit(vtos, InterpreterMacroAssembler::NotifyJVMTI); | |
1255 | |
1256 // restore potential result in rdx:rax, call result handler to restore potential result in ST0 & handle result | |
1257 __ pop(ltos); | |
304 | 1258 __ movptr(t, Address(rbp, frame::interpreter_frame_result_handler_offset*wordSize)); |
0 | 1259 __ call(t); |
1260 | |
1261 // remove activation | |
304 | 1262 __ movptr(t, Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize)); // get sender sp |
0 | 1263 __ leave(); // remove frame anchor |
304 | 1264 __ pop(rdi); // get return address |
1265 __ mov(rsp, t); // set sp to sender sp | |
0 | 1266 __ jmp(rdi); |
1267 | |
1268 if (inc_counter) { | |
1269 // Handle overflow of counter and compile method | |
1270 __ bind(invocation_counter_overflow); | |
1271 generate_counter_overflow(&continue_after_compile); | |
1272 } | |
1273 | |
1274 return entry_point; | |
1275 } | |
1276 | |
1277 // | |
1278 // Generic interpreted method entry to (asm) interpreter | |
1279 // | |
1280 address InterpreterGenerator::generate_normal_entry(bool synchronized) { | |
1281 // determine code generation flags | |
1282 bool inc_counter = UseCompiler || CountCompiledCalls; | |
1283 | |
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1284 // rbx,: Method* |
0 | 1285 // rsi: sender sp |
1286 address entry_point = __ pc(); | |
1287 | |
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1288 const Address constMethod (rbx, Method::const_offset()); |
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1289 const Address invocation_counter(rbx, Method::invocation_counter_offset() + InvocationCounter::counter_offset()); |
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1290 const Address access_flags (rbx, Method::access_flags_offset()); |
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1291 const Address size_of_parameters(rdx, ConstMethod::size_of_parameters_offset()); |
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1292 const Address size_of_locals (rdx, ConstMethod::size_of_locals_offset()); |
0 | 1293 |
1294 // get parameter size (always needed) | |
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1295 __ movptr(rdx, constMethod); |
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1296 __ load_unsigned_short(rcx, size_of_parameters); |
0 | 1297 |
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1298 // rbx,: Method* |
0 | 1299 // rcx: size of parameters |
1300 | |
1301 // rsi: sender_sp (could differ from sp+wordSize if we were called via c2i ) | |
1302 | |
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1303 __ load_unsigned_short(rdx, size_of_locals); // get size of locals in words |
0 | 1304 __ subl(rdx, rcx); // rdx = no. of additional locals |
1305 | |
1306 // see if we've got enough room on the stack for locals plus overhead. | |
1307 generate_stack_overflow_check(); | |
1308 | |
1309 // get return address | |
304 | 1310 __ pop(rax); |
0 | 1311 |
1312 // compute beginning of parameters (rdi) | |
304 | 1313 __ lea(rdi, Address(rsp, rcx, Interpreter::stackElementScale(), -wordSize)); |
0 | 1314 |
1315 // rdx - # of additional locals | |
1316 // allocate space for locals | |
1317 // explicitly initialize locals | |
1318 { | |
1319 Label exit, loop; | |
1320 __ testl(rdx, rdx); | |
1321 __ jcc(Assembler::lessEqual, exit); // do nothing if rdx <= 0 | |
1322 __ bind(loop); | |
304 | 1323 __ push((int32_t)NULL_WORD); // initialize local variables |
0 | 1324 __ decrement(rdx); // until everything initialized |
1325 __ jcc(Assembler::greater, loop); | |
1326 __ bind(exit); | |
1327 } | |
1328 | |
1329 if (inc_counter) __ movl(rcx, invocation_counter); // (pre-)fetch invocation count | |
1330 // initialize fixed part of activation frame | |
1331 generate_fixed_frame(false); | |
1332 | |
1333 // make sure method is not native & not abstract | |
1334 #ifdef ASSERT | |
1335 __ movl(rax, access_flags); | |
1336 { | |
1337 Label L; | |
1338 __ testl(rax, JVM_ACC_NATIVE); | |
1339 __ jcc(Assembler::zero, L); | |
1340 __ stop("tried to execute native method as non-native"); | |
1341 __ bind(L); | |
1342 } | |
1343 { Label L; | |
1344 __ testl(rax, JVM_ACC_ABSTRACT); | |
1345 __ jcc(Assembler::zero, L); | |
1346 __ stop("tried to execute abstract method in interpreter"); | |
1347 __ bind(L); | |
1348 } | |
1349 #endif | |
1350 | |
1351 // Since at this point in the method invocation the exception handler | |
1352 // would try to exit the monitor of synchronized methods which hasn't | |
1353 // been entered yet, we set the thread local variable | |
1354 // _do_not_unlock_if_synchronized to true. The remove_activation will | |
1355 // check this flag. | |
1356 | |
1357 __ get_thread(rax); | |
1358 const Address do_not_unlock_if_synchronized(rax, | |
1359 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset())); | |
1360 __ movbool(do_not_unlock_if_synchronized, true); | |
1361 | |
1362 // increment invocation count & check for overflow | |
1363 Label invocation_counter_overflow; | |
1364 Label profile_method; | |
1365 Label profile_method_continue; | |
1366 if (inc_counter) { | |
1367 generate_counter_incr(&invocation_counter_overflow, &profile_method, &profile_method_continue); | |
1368 if (ProfileInterpreter) { | |
1369 __ bind(profile_method_continue); | |
1370 } | |
1371 } | |
1372 Label continue_after_compile; | |
1373 __ bind(continue_after_compile); | |
1374 | |
1375 bang_stack_shadow_pages(false); | |
1376 | |
1377 // reset the _do_not_unlock_if_synchronized flag | |
1378 __ get_thread(rax); | |
1379 __ movbool(do_not_unlock_if_synchronized, false); | |
1380 | |
1381 // check for synchronized methods | |
1382 // Must happen AFTER invocation_counter check and stack overflow check, | |
1383 // so method is not locked if overflows. | |
1384 // | |
1385 if (synchronized) { | |
1386 // Allocate monitor and lock method | |
1387 lock_method(); | |
1388 } else { | |
1389 // no synchronization necessary | |
1390 #ifdef ASSERT | |
1391 { Label L; | |
1392 __ movl(rax, access_flags); | |
1393 __ testl(rax, JVM_ACC_SYNCHRONIZED); | |
1394 __ jcc(Assembler::zero, L); | |
1395 __ stop("method needs synchronization"); | |
1396 __ bind(L); | |
1397 } | |
1398 #endif | |
1399 } | |
1400 | |
1401 // start execution | |
1402 #ifdef ASSERT | |
1403 { Label L; | |
1404 const Address monitor_block_top (rbp, | |
1405 frame::interpreter_frame_monitor_block_top_offset * wordSize); | |
304 | 1406 __ movptr(rax, monitor_block_top); |
1407 __ cmpptr(rax, rsp); | |
0 | 1408 __ jcc(Assembler::equal, L); |
1409 __ stop("broken stack frame setup in interpreter"); | |
1410 __ bind(L); | |
1411 } | |
1412 #endif | |
1413 | |
1414 // jvmti support | |
1415 __ notify_method_entry(); | |
1416 | |
1417 __ dispatch_next(vtos); | |
1418 | |
1419 // invocation counter overflow | |
1420 if (inc_counter) { | |
1421 if (ProfileInterpreter) { | |
1422 // We have decided to profile this method in the interpreter | |
1423 __ bind(profile_method); | |
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1424 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method)); |
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1425 __ set_method_data_pointer_for_bcp(); |
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1426 __ get_method(rbx); |
0 | 1427 __ jmp(profile_method_continue); |
1428 } | |
1429 // Handle overflow of counter and compile method | |
1430 __ bind(invocation_counter_overflow); | |
1431 generate_counter_overflow(&continue_after_compile); | |
1432 } | |
1433 | |
1434 return entry_point; | |
1435 } | |
1436 | |
1437 //------------------------------------------------------------------------------------------------------------------------ | |
1438 // Entry points | |
1439 // | |
1440 // Here we generate the various kind of entries into the interpreter. | |
1441 // The two main entry type are generic bytecode methods and native call method. | |
1442 // These both come in synchronized and non-synchronized versions but the | |
1443 // frame layout they create is very similar. The other method entry | |
1444 // types are really just special purpose entries that are really entry | |
1445 // and interpretation all in one. These are for trivial methods like | |
1446 // accessor, empty, or special math methods. | |
1447 // | |
1448 // When control flow reaches any of the entry types for the interpreter | |
1449 // the following holds -> | |
1450 // | |
1451 // Arguments: | |
1452 // | |
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1453 // rbx,: Method* |
0 | 1454 // rcx: receiver |
1455 // | |
1456 // | |
1457 // Stack layout immediately at entry | |
1458 // | |
1459 // [ return address ] <--- rsp | |
1460 // [ parameter n ] | |
1461 // ... | |
1462 // [ parameter 1 ] | |
1463 // [ expression stack ] (caller's java expression stack) | |
1464 | |
1465 // Assuming that we don't go to one of the trivial specialized | |
1466 // entries the stack will look like below when we are ready to execute | |
1467 // the first bytecode (or call the native routine). The register usage | |
1468 // will be as the template based interpreter expects (see interpreter_x86.hpp). | |
1469 // | |
1470 // local variables follow incoming parameters immediately; i.e. | |
1471 // the return address is moved to the end of the locals). | |
1472 // | |
1473 // [ monitor entry ] <--- rsp | |
1474 // ... | |
1475 // [ monitor entry ] | |
1476 // [ expr. stack bottom ] | |
1477 // [ saved rsi ] | |
1478 // [ current rdi ] | |
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1479 // [ Method* ] |
0 | 1480 // [ saved rbp, ] <--- rbp, |
1481 // [ return address ] | |
1482 // [ local variable m ] | |
1483 // ... | |
1484 // [ local variable 1 ] | |
1485 // [ parameter n ] | |
1486 // ... | |
1487 // [ parameter 1 ] <--- rdi | |
1488 | |
1489 address AbstractInterpreterGenerator::generate_method_entry(AbstractInterpreter::MethodKind kind) { | |
1490 // determine code generation flags | |
1491 bool synchronized = false; | |
1492 address entry_point = NULL; | |
1493 | |
1494 switch (kind) { | |
1495 case Interpreter::zerolocals : break; | |
1496 case Interpreter::zerolocals_synchronized: synchronized = true; break; | |
1497 case Interpreter::native : entry_point = ((InterpreterGenerator*)this)->generate_native_entry(false); break; | |
1498 case Interpreter::native_synchronized : entry_point = ((InterpreterGenerator*)this)->generate_native_entry(true); break; | |
1499 case Interpreter::empty : entry_point = ((InterpreterGenerator*)this)->generate_empty_entry(); break; | |
1500 case Interpreter::accessor : entry_point = ((InterpreterGenerator*)this)->generate_accessor_entry(); break; | |
1501 case Interpreter::abstract : entry_point = ((InterpreterGenerator*)this)->generate_abstract_entry(); break; | |
1502 | |
1503 case Interpreter::java_lang_math_sin : // fall thru | |
1504 case Interpreter::java_lang_math_cos : // fall thru | |
1505 case Interpreter::java_lang_math_tan : // fall thru | |
1506 case Interpreter::java_lang_math_abs : // fall thru | |
1507 case Interpreter::java_lang_math_log : // fall thru | |
1508 case Interpreter::java_lang_math_log10 : // fall thru | |
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1509 case Interpreter::java_lang_math_sqrt : // fall thru |
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1510 case Interpreter::java_lang_math_pow : // fall thru |
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1511 case Interpreter::java_lang_math_exp : entry_point = ((InterpreterGenerator*)this)->generate_math_entry(kind); break; |
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1512 case Interpreter::java_lang_ref_reference_get |
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1513 : entry_point = ((InterpreterGenerator*)this)->generate_Reference_get_entry(); break; |
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1514 default: |
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1515 fatal(err_msg("unexpected method kind: %d", kind)); |
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1516 break; |
0 | 1517 } |
1518 | |
1519 if (entry_point) return entry_point; | |
1520 | |
1521 return ((InterpreterGenerator*)this)->generate_normal_entry(synchronized); | |
1522 | |
1523 } | |
1524 | |
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1525 // These should never be compiled since the interpreter will prefer |
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1526 // the compiled version to the intrinsic version. |
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1527 bool AbstractInterpreter::can_be_compiled(methodHandle m) { |
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1528 switch (method_kind(m)) { |
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1529 case Interpreter::java_lang_math_sin : // fall thru |
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1530 case Interpreter::java_lang_math_cos : // fall thru |
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1531 case Interpreter::java_lang_math_tan : // fall thru |
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1532 case Interpreter::java_lang_math_abs : // fall thru |
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1533 case Interpreter::java_lang_math_log : // fall thru |
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1534 case Interpreter::java_lang_math_log10 : // fall thru |
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1535 case Interpreter::java_lang_math_sqrt : // fall thru |
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1536 case Interpreter::java_lang_math_pow : // fall thru |
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1537 case Interpreter::java_lang_math_exp : |
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1538 return false; |
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1539 default: |
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1540 return true; |
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1541 } |
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1542 } |
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1543 |
0 | 1544 // How much stack a method activation needs in words. |
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1545 int AbstractInterpreter::size_top_interpreter_activation(Method* method) { |
0 | 1546 |
1547 const int stub_code = 4; // see generate_call_stub | |
1548 // Save space for one monitor to get into the interpreted method in case | |
1549 // the method is synchronized | |
1550 int monitor_size = method->is_synchronized() ? | |
1551 1*frame::interpreter_frame_monitor_size() : 0; | |
1552 | |
1553 // total overhead size: entry_size + (saved rbp, thru expr stack bottom). | |
1554 // be sure to change this if you add/subtract anything to/from the overhead area | |
1555 const int overhead_size = -frame::interpreter_frame_initial_sp_offset; | |
1556 | |
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1557 const int extra_stack = Method::extra_stack_entries(); |
710 | 1558 const int method_stack = (method->max_locals() + method->max_stack() + extra_stack) * |
1506 | 1559 Interpreter::stackElementWords; |
0 | 1560 return overhead_size + method_stack + stub_code; |
1561 } | |
1562 | |
1563 // asm based interpreter deoptimization helpers | |
1564 | |
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1565 int AbstractInterpreter::layout_activation(Method* method, |
0 | 1566 int tempcount, |
1567 int popframe_extra_args, | |
1568 int moncount, | |
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1569 int caller_actual_parameters, |
0 | 1570 int callee_param_count, |
1571 int callee_locals, | |
1572 frame* caller, | |
1573 frame* interpreter_frame, | |
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1574 bool is_top_frame, |
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1575 bool is_bottom_frame) { |
0 | 1576 // Note: This calculation must exactly parallel the frame setup |
1577 // in AbstractInterpreterGenerator::generate_method_entry. | |
1578 // If interpreter_frame!=NULL, set up the method, locals, and monitors. | |
1579 // The frame interpreter_frame, if not NULL, is guaranteed to be the right size, | |
1580 // as determined by a previous call to this method. | |
1581 // It is also guaranteed to be walkable even though it is in a skeletal state | |
1582 // NOTE: return size is in words not bytes | |
1583 | |
1584 // fixed size of an interpreter frame: | |
1506 | 1585 int max_locals = method->max_locals() * Interpreter::stackElementWords; |
0 | 1586 int extra_locals = (method->max_locals() - method->size_of_parameters()) * |
1506 | 1587 Interpreter::stackElementWords; |
0 | 1588 |
1589 int overhead = frame::sender_sp_offset - frame::interpreter_frame_initial_sp_offset; | |
1590 | |
1591 // Our locals were accounted for by the caller (or last_frame_adjust on the transistion) | |
1592 // Since the callee parameters already account for the callee's params we only need to account for | |
1593 // the extra locals. | |
1594 | |
1595 | |
1596 int size = overhead + | |
1506 | 1597 ((callee_locals - callee_param_count)*Interpreter::stackElementWords) + |
0 | 1598 (moncount*frame::interpreter_frame_monitor_size()) + |
1506 | 1599 tempcount*Interpreter::stackElementWords + popframe_extra_args; |
0 | 1600 |
1601 if (interpreter_frame != NULL) { | |
1602 #ifdef ASSERT | |
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1603 if (!EnableInvokeDynamic) |
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1604 // @@@ FIXME: Should we correct interpreter_frame_sender_sp in the calling sequences? |
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1605 // Probably, since deoptimization doesn't work yet. |
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1606 assert(caller->unextended_sp() == interpreter_frame->interpreter_frame_sender_sp(), "Frame not properly walkable"); |
0 | 1607 assert(caller->sp() == interpreter_frame->sender_sp(), "Frame not properly walkable(2)"); |
1608 #endif | |
1609 | |
1610 interpreter_frame->interpreter_frame_set_method(method); | |
1611 // NOTE the difference in using sender_sp and interpreter_frame_sender_sp | |
1612 // interpreter_frame_sender_sp is the original sp of the caller (the unextended_sp) | |
1613 // and sender_sp is fp+8 | |
1614 intptr_t* locals = interpreter_frame->sender_sp() + max_locals - 1; | |
1615 | |
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1616 #ifdef ASSERT |
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1617 if (caller->is_interpreted_frame()) { |
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1618 assert(locals < caller->fp() + frame::interpreter_frame_initial_sp_offset, "bad placement"); |
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1619 } |
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1620 #endif |
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1621 |
0 | 1622 interpreter_frame->interpreter_frame_set_locals(locals); |
1623 BasicObjectLock* montop = interpreter_frame->interpreter_frame_monitor_begin(); | |
1624 BasicObjectLock* monbot = montop - moncount; | |
1625 interpreter_frame->interpreter_frame_set_monitor_end(monbot); | |
1626 | |
1627 // Set last_sp | |
1628 intptr_t* rsp = (intptr_t*) monbot - | |
1506 | 1629 tempcount*Interpreter::stackElementWords - |
0 | 1630 popframe_extra_args; |
1631 interpreter_frame->interpreter_frame_set_last_sp(rsp); | |
1632 | |
1633 // All frames but the initial (oldest) interpreter frame we fill in have a | |
1634 // value for sender_sp that allows walking the stack but isn't | |
1635 // truly correct. Correct the value here. | |
1636 | |
1637 if (extra_locals != 0 && | |
1638 interpreter_frame->sender_sp() == interpreter_frame->interpreter_frame_sender_sp() ) { | |
1639 interpreter_frame->set_interpreter_frame_sender_sp(caller->sp() + extra_locals); | |
1640 } | |
1641 *interpreter_frame->interpreter_frame_cache_addr() = | |
1642 method->constants()->cache(); | |
1643 } | |
1644 return size; | |
1645 } | |
1646 | |
1647 | |
1648 //------------------------------------------------------------------------------------------------------------------------ | |
1649 // Exceptions | |
1650 | |
1651 void TemplateInterpreterGenerator::generate_throw_exception() { | |
1652 // Entry point in previous activation (i.e., if the caller was interpreted) | |
1653 Interpreter::_rethrow_exception_entry = __ pc(); | |
1295 | 1654 const Register thread = rcx; |
0 | 1655 |
1656 // Restore sp to interpreter_frame_last_sp even though we are going | |
1657 // to empty the expression stack for the exception processing. | |
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1658 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD); |
0 | 1659 // rax,: exception |
1660 // rdx: return address/pc that threw exception | |
1661 __ restore_bcp(); // rsi points to call/send | |
1662 __ restore_locals(); | |
1663 | |
1664 // Entry point for exceptions thrown within interpreter code | |
1665 Interpreter::_throw_exception_entry = __ pc(); | |
1666 // expression stack is undefined here | |
1667 // rax,: exception | |
1668 // rsi: exception bcp | |
1669 __ verify_oop(rax); | |
1670 | |
1671 // expression stack must be empty before entering the VM in case of an exception | |
1672 __ empty_expression_stack(); | |
1673 __ empty_FPU_stack(); | |
1674 // find exception handler address and preserve exception oop | |
1675 __ call_VM(rdx, CAST_FROM_FN_PTR(address, InterpreterRuntime::exception_handler_for_exception), rax); | |
1676 // rax,: exception handler entry point | |
1677 // rdx: preserved exception oop | |
1678 // rsi: bcp for exception handler | |
1679 __ push_ptr(rdx); // push exception which is now the only value on the stack | |
1680 __ jmp(rax); // jump to exception handler (may be _remove_activation_entry!) | |
1681 | |
1682 // If the exception is not handled in the current frame the frame is removed and | |
1683 // the exception is rethrown (i.e. exception continuation is _rethrow_exception). | |
1684 // | |
1685 // Note: At this point the bci is still the bxi for the instruction which caused | |
1686 // the exception and the expression stack is empty. Thus, for any VM calls | |
1687 // at this point, GC will find a legal oop map (with empty expression stack). | |
1688 | |
1689 // In current activation | |
1690 // tos: exception | |
1691 // rsi: exception bcp | |
1692 | |
1693 // | |
1694 // JVMTI PopFrame support | |
1695 // | |
1696 | |
1697 Interpreter::_remove_activation_preserving_args_entry = __ pc(); | |
1698 __ empty_expression_stack(); | |
1699 __ empty_FPU_stack(); | |
1700 // Set the popframe_processing bit in pending_popframe_condition indicating that we are | |
1701 // currently handling popframe, so that call_VMs that may happen later do not trigger new | |
1702 // popframe handling cycles. | |
1295 | 1703 __ get_thread(thread); |
1704 __ movl(rdx, Address(thread, JavaThread::popframe_condition_offset())); | |
0 | 1705 __ orl(rdx, JavaThread::popframe_processing_bit); |
1295 | 1706 __ movl(Address(thread, JavaThread::popframe_condition_offset()), rdx); |
0 | 1707 |
1708 { | |
1709 // Check to see whether we are returning to a deoptimized frame. | |
1710 // (The PopFrame call ensures that the caller of the popped frame is | |
1711 // either interpreted or compiled and deoptimizes it if compiled.) | |
1712 // In this case, we can't call dispatch_next() after the frame is | |
1713 // popped, but instead must save the incoming arguments and restore | |
1714 // them after deoptimization has occurred. | |
1715 // | |
1716 // Note that we don't compare the return PC against the | |
1717 // deoptimization blob's unpack entry because of the presence of | |
1718 // adapter frames in C2. | |
1719 Label caller_not_deoptimized; | |
304 | 1720 __ movptr(rdx, Address(rbp, frame::return_addr_offset * wordSize)); |
0 | 1721 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::interpreter_contains), rdx); |
1722 __ testl(rax, rax); | |
1723 __ jcc(Assembler::notZero, caller_not_deoptimized); | |
1724 | |
1725 // Compute size of arguments for saving when returning to deoptimized caller | |
1726 __ get_method(rax); | |
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1727 __ movptr(rax, Address(rax, Method::const_offset())); |
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1728 __ load_unsigned_short(rax, Address(rax, ConstMethod::size_of_parameters_offset())); |
1506 | 1729 __ shlptr(rax, Interpreter::logStackElementSize); |
0 | 1730 __ restore_locals(); |
304 | 1731 __ subptr(rdi, rax); |
1732 __ addptr(rdi, wordSize); | |
0 | 1733 // Save these arguments |
1295 | 1734 __ get_thread(thread); |
1735 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, Deoptimization::popframe_preserve_args), thread, rax, rdi); | |
0 | 1736 |
1737 __ remove_activation(vtos, rdx, | |
1738 /* throw_monitor_exception */ false, | |
1739 /* install_monitor_exception */ false, | |
1740 /* notify_jvmdi */ false); | |
1741 | |
1742 // Inform deoptimization that it is responsible for restoring these arguments | |
1295 | 1743 __ get_thread(thread); |
1744 __ movl(Address(thread, JavaThread::popframe_condition_offset()), JavaThread::popframe_force_deopt_reexecution_bit); | |
0 | 1745 |
1746 // Continue in deoptimization handler | |
1747 __ jmp(rdx); | |
1748 | |
1749 __ bind(caller_not_deoptimized); | |
1750 } | |
1751 | |
1752 __ remove_activation(vtos, rdx, | |
1753 /* throw_monitor_exception */ false, | |
1754 /* install_monitor_exception */ false, | |
1755 /* notify_jvmdi */ false); | |
1756 | |
1757 // Finish with popframe handling | |
1758 // A previous I2C followed by a deoptimization might have moved the | |
1759 // outgoing arguments further up the stack. PopFrame expects the | |
1760 // mutations to those outgoing arguments to be preserved and other | |
1761 // constraints basically require this frame to look exactly as | |
1762 // though it had previously invoked an interpreted activation with | |
1763 // no space between the top of the expression stack (current | |
1764 // last_sp) and the top of stack. Rather than force deopt to | |
1765 // maintain this kind of invariant all the time we call a small | |
1766 // fixup routine to move the mutated arguments onto the top of our | |
1767 // expression stack if necessary. | |
304 | 1768 __ mov(rax, rsp); |
1769 __ movptr(rbx, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize)); | |
1295 | 1770 __ get_thread(thread); |
0 | 1771 // PC must point into interpreter here |
1295 | 1772 __ set_last_Java_frame(thread, noreg, rbp, __ pc()); |
1773 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::popframe_move_outgoing_args), thread, rax, rbx); | |
1774 __ get_thread(thread); | |
1775 __ reset_last_Java_frame(thread, true, true); | |
0 | 1776 // Restore the last_sp and null it out |
304 | 1777 __ movptr(rsp, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize)); |
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1778 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD); |
0 | 1779 |
1780 __ restore_bcp(); | |
1781 __ restore_locals(); | |
1782 // The method data pointer was incremented already during | |
1783 // call profiling. We have to restore the mdp for the current bcp. | |
1784 if (ProfileInterpreter) { | |
1785 __ set_method_data_pointer_for_bcp(); | |
1786 } | |
1787 | |
1788 // Clear the popframe condition flag | |
1295 | 1789 __ get_thread(thread); |
1790 __ movl(Address(thread, JavaThread::popframe_condition_offset()), JavaThread::popframe_inactive); | |
0 | 1791 |
1792 __ dispatch_next(vtos); | |
1793 // end of PopFrame support | |
1794 | |
1795 Interpreter::_remove_activation_entry = __ pc(); | |
1796 | |
1797 // preserve exception over this code sequence | |
1798 __ pop_ptr(rax); | |
1295 | 1799 __ get_thread(thread); |
1800 __ movptr(Address(thread, JavaThread::vm_result_offset()), rax); | |
0 | 1801 // remove the activation (without doing throws on illegalMonitorExceptions) |
1802 __ remove_activation(vtos, rdx, false, true, false); | |
1803 // restore exception | |
1295 | 1804 __ get_thread(thread); |
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1805 __ get_vm_result(rax, thread); |
0 | 1806 |
1807 // Inbetween activations - previous activation type unknown yet | |
1808 // compute continuation point - the continuation point expects | |
1809 // the following registers set up: | |
1810 // | |
1295 | 1811 // rax: exception |
0 | 1812 // rdx: return address/pc that threw exception |
1813 // rsp: expression stack of caller | |
1295 | 1814 // rbp: rbp, of caller |
304 | 1815 __ push(rax); // save exception |
1816 __ push(rdx); // save return address | |
1295 | 1817 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), thread, rdx); |
304 | 1818 __ mov(rbx, rax); // save exception handler |
1819 __ pop(rdx); // restore return address | |
1820 __ pop(rax); // restore exception | |
0 | 1821 // Note that an "issuing PC" is actually the next PC after the call |
1822 __ jmp(rbx); // jump to exception handler of caller | |
1823 } | |
1824 | |
1825 | |
1826 // | |
1827 // JVMTI ForceEarlyReturn support | |
1828 // | |
1829 address TemplateInterpreterGenerator::generate_earlyret_entry_for(TosState state) { | |
1830 address entry = __ pc(); | |
1295 | 1831 const Register thread = rcx; |
0 | 1832 |
1833 __ restore_bcp(); | |
1834 __ restore_locals(); | |
1835 __ empty_expression_stack(); | |
1836 __ empty_FPU_stack(); | |
1837 __ load_earlyret_value(state); | |
1838 | |
1295 | 1839 __ get_thread(thread); |
1840 __ movptr(rcx, Address(thread, JavaThread::jvmti_thread_state_offset())); | |
0 | 1841 const Address cond_addr(rcx, JvmtiThreadState::earlyret_state_offset()); |
1842 | |
1843 // Clear the earlyret state | |
1844 __ movl(cond_addr, JvmtiThreadState::earlyret_inactive); | |
1845 | |
1846 __ remove_activation(state, rsi, | |
1847 false, /* throw_monitor_exception */ | |
1848 false, /* install_monitor_exception */ | |
1849 true); /* notify_jvmdi */ | |
1850 __ jmp(rsi); | |
1851 return entry; | |
1852 } // end of ForceEarlyReturn support | |
1853 | |
1854 | |
1855 //------------------------------------------------------------------------------------------------------------------------ | |
1856 // Helper for vtos entry point generation | |
1857 | |
1858 void TemplateInterpreterGenerator::set_vtos_entry_points (Template* t, address& bep, address& cep, address& sep, address& aep, address& iep, address& lep, address& fep, address& dep, address& vep) { | |
1859 assert(t->is_valid() && t->tos_in() == vtos, "illegal template"); | |
1860 Label L; | |
1861 fep = __ pc(); __ push(ftos); __ jmp(L); | |
1862 dep = __ pc(); __ push(dtos); __ jmp(L); | |
1863 lep = __ pc(); __ push(ltos); __ jmp(L); | |
1864 aep = __ pc(); __ push(atos); __ jmp(L); | |
1865 bep = cep = sep = // fall through | |
1866 iep = __ pc(); __ push(itos); // fall through | |
1867 vep = __ pc(); __ bind(L); // fall through | |
1868 generate_and_dispatch(t); | |
1869 } | |
1870 | |
1871 //------------------------------------------------------------------------------------------------------------------------ | |
1872 // Generation of individual instructions | |
1873 | |
1874 // helpers for generate_and_dispatch | |
1875 | |
1876 | |
1877 | |
1878 InterpreterGenerator::InterpreterGenerator(StubQueue* code) | |
1879 : TemplateInterpreterGenerator(code) { | |
1880 generate_all(); // down here so it can be "virtual" | |
1881 } | |
1882 | |
1883 //------------------------------------------------------------------------------------------------------------------------ | |
1884 | |
1885 // Non-product code | |
1886 #ifndef PRODUCT | |
1887 address TemplateInterpreterGenerator::generate_trace_code(TosState state) { | |
1888 address entry = __ pc(); | |
1889 | |
1890 // prepare expression stack | |
304 | 1891 __ pop(rcx); // pop return address so expression stack is 'pure' |
0 | 1892 __ push(state); // save tosca |
1893 | |
1894 // pass tosca registers as arguments & call tracer | |
1895 __ call_VM(noreg, CAST_FROM_FN_PTR(address, SharedRuntime::trace_bytecode), rcx, rax, rdx); | |
304 | 1896 __ mov(rcx, rax); // make sure return address is not destroyed by pop(state) |
0 | 1897 __ pop(state); // restore tosca |
1898 | |
1899 // return | |
1900 __ jmp(rcx); | |
1901 | |
1902 return entry; | |
1903 } | |
1904 | |
1905 | |
1906 void TemplateInterpreterGenerator::count_bytecode() { | |
304 | 1907 __ incrementl(ExternalAddress((address) &BytecodeCounter::_counter_value)); |
0 | 1908 } |
1909 | |
1910 | |
1911 void TemplateInterpreterGenerator::histogram_bytecode(Template* t) { | |
304 | 1912 __ incrementl(ExternalAddress((address) &BytecodeHistogram::_counters[t->bytecode()])); |
0 | 1913 } |
1914 | |
1915 | |
1916 void TemplateInterpreterGenerator::histogram_bytecode_pair(Template* t) { | |
1917 __ mov32(ExternalAddress((address) &BytecodePairHistogram::_index), rbx); | |
1918 __ shrl(rbx, BytecodePairHistogram::log2_number_of_codes); | |
1919 __ orl(rbx, ((int)t->bytecode()) << BytecodePairHistogram::log2_number_of_codes); | |
1920 ExternalAddress table((address) BytecodePairHistogram::_counters); | |
1921 Address index(noreg, rbx, Address::times_4); | |
304 | 1922 __ incrementl(ArrayAddress(table, index)); |
0 | 1923 } |
1924 | |
1925 | |
1926 void TemplateInterpreterGenerator::trace_bytecode(Template* t) { | |
1927 // Call a little run-time stub to avoid blow-up for each bytecode. | |
1928 // The run-time runtime saves the right registers, depending on | |
1929 // the tosca in-state for the given template. | |
1930 assert(Interpreter::trace_code(t->tos_in()) != NULL, | |
1931 "entry must have been generated"); | |
1932 __ call(RuntimeAddress(Interpreter::trace_code(t->tos_in()))); | |
1933 } | |
1934 | |
1935 | |
1936 void TemplateInterpreterGenerator::stop_interpreter_at() { | |
1937 Label L; | |
1938 __ cmp32(ExternalAddress((address) &BytecodeCounter::_counter_value), | |
1939 StopInterpreterAt); | |
1940 __ jcc(Assembler::notEqual, L); | |
1941 __ int3(); | |
1942 __ bind(L); | |
1943 } | |
1944 #endif // !PRODUCT | |
1945 #endif // CC_INTERP |