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annotate src/cpu/x86/vm/interp_masm_x86_64.cpp @ 6229:d900d95bfdb0
7183754: Test runtime/6294277/Test6294277.sh runs wrong JVM
Reviewed-by: kamg, coleenp, ctornqvi
author | fparain |
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date | Mon, 16 Jul 2012 04:06:44 -0700 |
parents | f08d439fab8c |
children | 0e1f15ec0e94 1d7922586cf6 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2003, 2011, 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" |
26 #include "interp_masm_x86_64.hpp" | |
27 #include "interpreter/interpreter.hpp" | |
28 #include "interpreter/interpreterRuntime.hpp" | |
29 #include "oops/arrayOop.hpp" | |
30 #include "oops/markOop.hpp" | |
31 #include "oops/methodDataOop.hpp" | |
32 #include "oops/methodOop.hpp" | |
33 #include "prims/jvmtiExport.hpp" | |
34 #include "prims/jvmtiRedefineClassesTrace.hpp" | |
35 #include "prims/jvmtiThreadState.hpp" | |
36 #include "runtime/basicLock.hpp" | |
37 #include "runtime/biasedLocking.hpp" | |
38 #include "runtime/sharedRuntime.hpp" | |
39 #ifdef TARGET_OS_FAMILY_linux | |
40 # include "thread_linux.inline.hpp" | |
41 #endif | |
42 #ifdef TARGET_OS_FAMILY_solaris | |
43 # include "thread_solaris.inline.hpp" | |
44 #endif | |
45 #ifdef TARGET_OS_FAMILY_windows | |
46 # include "thread_windows.inline.hpp" | |
47 #endif | |
3960 | 48 #ifdef TARGET_OS_FAMILY_bsd |
49 # include "thread_bsd.inline.hpp" | |
50 #endif | |
0 | 51 |
52 | |
53 // Implementation of InterpreterMacroAssembler | |
54 | |
304 | 55 #ifdef CC_INTERP |
56 void InterpreterMacroAssembler::get_method(Register reg) { | |
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57 movptr(reg, Address(rbp, -((int)sizeof(BytecodeInterpreter) + 2 * wordSize))); |
304 | 58 movptr(reg, Address(reg, byte_offset_of(BytecodeInterpreter, _method))); |
59 } | |
60 #endif // CC_INTERP | |
61 | |
62 #ifndef CC_INTERP | |
63 | |
0 | 64 void InterpreterMacroAssembler::call_VM_leaf_base(address entry_point, |
65 int number_of_arguments) { | |
66 // interpreter specific | |
67 // | |
68 // Note: No need to save/restore bcp & locals (r13 & r14) pointer | |
69 // since these are callee saved registers and no blocking/ | |
70 // GC can happen in leaf calls. | |
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71 // Further Note: DO NOT save/restore bcp/locals. If a caller has |
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72 // already saved them so that it can use esi/edi as temporaries |
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73 // then a save/restore here will DESTROY the copy the caller |
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74 // saved! There used to be a save_bcp() that only happened in |
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75 // the ASSERT path (no restore_bcp). Which caused bizarre failures |
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76 // when jvm built with ASSERTs. |
0 | 77 #ifdef ASSERT |
78 { | |
79 Label L; | |
304 | 80 cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD); |
0 | 81 jcc(Assembler::equal, L); |
82 stop("InterpreterMacroAssembler::call_VM_leaf_base:" | |
83 " last_sp != NULL"); | |
84 bind(L); | |
85 } | |
86 #endif | |
87 // super call | |
88 MacroAssembler::call_VM_leaf_base(entry_point, number_of_arguments); | |
89 // interpreter specific | |
342
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90 // Used to ASSERT that r13/r14 were equal to frame's bcp/locals |
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91 // but since they may not have been saved (and we don't want to |
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92 // save thme here (see note above) the assert is invalid. |
0 | 93 } |
94 | |
95 void InterpreterMacroAssembler::call_VM_base(Register oop_result, | |
96 Register java_thread, | |
97 Register last_java_sp, | |
98 address entry_point, | |
99 int number_of_arguments, | |
100 bool check_exceptions) { | |
101 // interpreter specific | |
102 // | |
103 // Note: Could avoid restoring locals ptr (callee saved) - however doesn't | |
104 // really make a difference for these runtime calls, since they are | |
105 // slow anyway. Btw., bcp must be saved/restored since it may change | |
106 // due to GC. | |
107 // assert(java_thread == noreg , "not expecting a precomputed java thread"); | |
108 save_bcp(); | |
109 #ifdef ASSERT | |
110 { | |
111 Label L; | |
304 | 112 cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD); |
0 | 113 jcc(Assembler::equal, L); |
114 stop("InterpreterMacroAssembler::call_VM_leaf_base:" | |
115 " last_sp != NULL"); | |
116 bind(L); | |
117 } | |
118 #endif /* ASSERT */ | |
119 // super call | |
120 MacroAssembler::call_VM_base(oop_result, noreg, last_java_sp, | |
121 entry_point, number_of_arguments, | |
122 check_exceptions); | |
123 // interpreter specific | |
124 restore_bcp(); | |
125 restore_locals(); | |
126 } | |
127 | |
128 | |
129 void InterpreterMacroAssembler::check_and_handle_popframe(Register java_thread) { | |
130 if (JvmtiExport::can_pop_frame()) { | |
131 Label L; | |
132 // Initiate popframe handling only if it is not already being | |
133 // processed. If the flag has the popframe_processing bit set, it | |
134 // means that this code is called *during* popframe handling - we | |
135 // don't want to reenter. | |
136 // This method is only called just after the call into the vm in | |
137 // call_VM_base, so the arg registers are available. | |
138 movl(c_rarg0, Address(r15_thread, JavaThread::popframe_condition_offset())); | |
139 testl(c_rarg0, JavaThread::popframe_pending_bit); | |
140 jcc(Assembler::zero, L); | |
141 testl(c_rarg0, JavaThread::popframe_processing_bit); | |
142 jcc(Assembler::notZero, L); | |
143 // Call Interpreter::remove_activation_preserving_args_entry() to get the | |
144 // address of the same-named entrypoint in the generated interpreter code. | |
145 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_preserving_args_entry)); | |
146 jmp(rax); | |
147 bind(L); | |
148 } | |
149 } | |
150 | |
151 | |
152 void InterpreterMacroAssembler::load_earlyret_value(TosState state) { | |
304 | 153 movptr(rcx, Address(r15_thread, JavaThread::jvmti_thread_state_offset())); |
0 | 154 const Address tos_addr(rcx, JvmtiThreadState::earlyret_tos_offset()); |
155 const Address oop_addr(rcx, JvmtiThreadState::earlyret_oop_offset()); | |
156 const Address val_addr(rcx, JvmtiThreadState::earlyret_value_offset()); | |
157 switch (state) { | |
304 | 158 case atos: movptr(rax, oop_addr); |
159 movptr(oop_addr, (int32_t)NULL_WORD); | |
0 | 160 verify_oop(rax, state); break; |
304 | 161 case ltos: movptr(rax, val_addr); break; |
0 | 162 case btos: // fall through |
163 case ctos: // fall through | |
164 case stos: // fall through | |
165 case itos: movl(rax, val_addr); break; | |
166 case ftos: movflt(xmm0, val_addr); break; | |
167 case dtos: movdbl(xmm0, val_addr); break; | |
168 case vtos: /* nothing to do */ break; | |
169 default : ShouldNotReachHere(); | |
170 } | |
171 // Clean up tos value in the thread object | |
172 movl(tos_addr, (int) ilgl); | |
304 | 173 movl(val_addr, (int32_t) NULL_WORD); |
0 | 174 } |
175 | |
176 | |
177 void InterpreterMacroAssembler::check_and_handle_earlyret(Register java_thread) { | |
178 if (JvmtiExport::can_force_early_return()) { | |
179 Label L; | |
304 | 180 movptr(c_rarg0, Address(r15_thread, JavaThread::jvmti_thread_state_offset())); |
181 testptr(c_rarg0, c_rarg0); | |
0 | 182 jcc(Assembler::zero, L); // if (thread->jvmti_thread_state() == NULL) exit; |
183 | |
184 // Initiate earlyret handling only if it is not already being processed. | |
185 // If the flag has the earlyret_processing bit set, it means that this code | |
186 // is called *during* earlyret handling - we don't want to reenter. | |
187 movl(c_rarg0, Address(c_rarg0, JvmtiThreadState::earlyret_state_offset())); | |
188 cmpl(c_rarg0, JvmtiThreadState::earlyret_pending); | |
189 jcc(Assembler::notEqual, L); | |
190 | |
191 // Call Interpreter::remove_activation_early_entry() to get the address of the | |
192 // same-named entrypoint in the generated interpreter code. | |
304 | 193 movptr(c_rarg0, Address(r15_thread, JavaThread::jvmti_thread_state_offset())); |
0 | 194 movl(c_rarg0, Address(c_rarg0, JvmtiThreadState::earlyret_tos_offset())); |
195 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry), c_rarg0); | |
196 jmp(rax); | |
197 bind(L); | |
198 } | |
199 } | |
200 | |
201 | |
202 void InterpreterMacroAssembler::get_unsigned_2_byte_index_at_bcp( | |
203 Register reg, | |
204 int bcp_offset) { | |
205 assert(bcp_offset >= 0, "bcp is still pointing to start of bytecode"); | |
206 movl(reg, Address(r13, bcp_offset)); | |
207 bswapl(reg); | |
208 shrl(reg, 16); | |
209 } | |
210 | |
211 | |
1108 | 212 void InterpreterMacroAssembler::get_cache_index_at_bcp(Register index, |
213 int bcp_offset, | |
1565 | 214 size_t index_size) { |
1108 | 215 assert(bcp_offset > 0, "bcp is still pointing to start of bytecode"); |
1565 | 216 if (index_size == sizeof(u2)) { |
1108 | 217 load_unsigned_short(index, Address(r13, bcp_offset)); |
1565 | 218 } else if (index_size == sizeof(u4)) { |
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219 assert(EnableInvokeDynamic, "giant index used only for JSR 292"); |
1108 | 220 movl(index, Address(r13, bcp_offset)); |
221 // Check if the secondary index definition is still ~x, otherwise | |
222 // we have to change the following assembler code to calculate the | |
223 // plain index. | |
224 assert(constantPoolCacheOopDesc::decode_secondary_index(~123) == 123, "else change next line"); | |
225 notl(index); // convert to plain index | |
1565 | 226 } else if (index_size == sizeof(u1)) { |
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227 assert(EnableInvokeDynamic, "tiny index used only for JSR 292"); |
1565 | 228 load_unsigned_byte(index, Address(r13, bcp_offset)); |
229 } else { | |
230 ShouldNotReachHere(); | |
1108 | 231 } |
232 } | |
233 | |
234 | |
0 | 235 void InterpreterMacroAssembler::get_cache_and_index_at_bcp(Register cache, |
236 Register index, | |
1108 | 237 int bcp_offset, |
1565 | 238 size_t index_size) { |
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239 assert_different_registers(cache, index); |
1565 | 240 get_cache_index_at_bcp(index, bcp_offset, index_size); |
304 | 241 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize)); |
0 | 242 assert(sizeof(ConstantPoolCacheEntry) == 4 * wordSize, "adjust code below"); |
243 // convert from field index to ConstantPoolCacheEntry index | |
244 shll(index, 2); | |
245 } | |
246 | |
247 | |
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248 void InterpreterMacroAssembler::get_cache_and_index_and_bytecode_at_bcp(Register cache, |
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249 Register index, |
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250 Register bytecode, |
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251 int byte_no, |
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252 int bcp_offset, |
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253 size_t index_size) { |
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254 get_cache_and_index_at_bcp(cache, index, bcp_offset, index_size); |
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255 // We use a 32-bit load here since the layout of 64-bit words on |
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256 // little-endian machines allow us that. |
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257 movl(bytecode, Address(cache, index, Address::times_ptr, constantPoolCacheOopDesc::base_offset() + ConstantPoolCacheEntry::indices_offset())); |
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258 const int shift_count = (1 + byte_no) * BitsPerByte; |
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259 shrl(bytecode, shift_count); |
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260 andl(bytecode, 0xFF); |
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261 } |
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262 |
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263 |
0 | 264 void InterpreterMacroAssembler::get_cache_entry_pointer_at_bcp(Register cache, |
265 Register tmp, | |
1108 | 266 int bcp_offset, |
1565 | 267 size_t index_size) { |
0 | 268 assert(cache != tmp, "must use different register"); |
1565 | 269 get_cache_index_at_bcp(tmp, bcp_offset, index_size); |
0 | 270 assert(sizeof(ConstantPoolCacheEntry) == 4 * wordSize, "adjust code below"); |
271 // convert from field index to ConstantPoolCacheEntry index | |
272 // and from word offset to byte offset | |
273 shll(tmp, 2 + LogBytesPerWord); | |
304 | 274 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize)); |
0 | 275 // skip past the header |
304 | 276 addptr(cache, in_bytes(constantPoolCacheOopDesc::base_offset())); |
277 addptr(cache, tmp); // construct pointer to cache entry | |
0 | 278 } |
279 | |
280 | |
281 // Generate a subtype check: branch to ok_is_subtype if sub_klass is a | |
282 // subtype of super_klass. | |
283 // | |
284 // Args: | |
285 // rax: superklass | |
286 // Rsub_klass: subklass | |
287 // | |
288 // Kills: | |
289 // rcx, rdi | |
290 void InterpreterMacroAssembler::gen_subtype_check(Register Rsub_klass, | |
291 Label& ok_is_subtype) { | |
292 assert(Rsub_klass != rax, "rax holds superklass"); | |
293 assert(Rsub_klass != r14, "r14 holds locals"); | |
294 assert(Rsub_klass != r13, "r13 holds bcp"); | |
295 assert(Rsub_klass != rcx, "rcx holds 2ndary super array length"); | |
296 assert(Rsub_klass != rdi, "rdi holds 2ndary super array scan ptr"); | |
297 | |
298 // Profile the not-null value's klass. | |
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299 profile_typecheck(rcx, Rsub_klass, rdi); // blows rcx, reloads rdi |
0 | 300 |
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301 // Do the check. |
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302 check_klass_subtype(Rsub_klass, rax, rcx, ok_is_subtype); // blows rcx |
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304 // Profile the failure of the check. |
0 | 305 profile_typecheck_failed(rcx); // blows rcx |
306 } | |
307 | |
308 | |
304 | 309 |
0 | 310 // Java Expression Stack |
311 | |
312 void InterpreterMacroAssembler::pop_ptr(Register r) { | |
304 | 313 pop(r); |
0 | 314 } |
315 | |
316 void InterpreterMacroAssembler::pop_i(Register r) { | |
304 | 317 // XXX can't use pop currently, upper half non clean |
0 | 318 movl(r, Address(rsp, 0)); |
304 | 319 addptr(rsp, wordSize); |
0 | 320 } |
321 | |
322 void InterpreterMacroAssembler::pop_l(Register r) { | |
323 movq(r, Address(rsp, 0)); | |
1506 | 324 addptr(rsp, 2 * Interpreter::stackElementSize); |
0 | 325 } |
326 | |
327 void InterpreterMacroAssembler::pop_f(XMMRegister r) { | |
328 movflt(r, Address(rsp, 0)); | |
304 | 329 addptr(rsp, wordSize); |
0 | 330 } |
331 | |
332 void InterpreterMacroAssembler::pop_d(XMMRegister r) { | |
333 movdbl(r, Address(rsp, 0)); | |
1506 | 334 addptr(rsp, 2 * Interpreter::stackElementSize); |
0 | 335 } |
336 | |
337 void InterpreterMacroAssembler::push_ptr(Register r) { | |
304 | 338 push(r); |
0 | 339 } |
340 | |
341 void InterpreterMacroAssembler::push_i(Register r) { | |
304 | 342 push(r); |
0 | 343 } |
344 | |
345 void InterpreterMacroAssembler::push_l(Register r) { | |
1506 | 346 subptr(rsp, 2 * wordSize); |
0 | 347 movq(Address(rsp, 0), r); |
348 } | |
349 | |
350 void InterpreterMacroAssembler::push_f(XMMRegister r) { | |
304 | 351 subptr(rsp, wordSize); |
0 | 352 movflt(Address(rsp, 0), r); |
353 } | |
354 | |
355 void InterpreterMacroAssembler::push_d(XMMRegister r) { | |
1506 | 356 subptr(rsp, 2 * wordSize); |
0 | 357 movdbl(Address(rsp, 0), r); |
358 } | |
359 | |
360 void InterpreterMacroAssembler::pop(TosState state) { | |
361 switch (state) { | |
362 case atos: pop_ptr(); break; | |
363 case btos: | |
364 case ctos: | |
365 case stos: | |
366 case itos: pop_i(); break; | |
367 case ltos: pop_l(); break; | |
368 case ftos: pop_f(); break; | |
369 case dtos: pop_d(); break; | |
370 case vtos: /* nothing to do */ break; | |
371 default: ShouldNotReachHere(); | |
372 } | |
373 verify_oop(rax, state); | |
374 } | |
375 | |
376 void InterpreterMacroAssembler::push(TosState state) { | |
377 verify_oop(rax, state); | |
378 switch (state) { | |
379 case atos: push_ptr(); break; | |
380 case btos: | |
381 case ctos: | |
382 case stos: | |
383 case itos: push_i(); break; | |
384 case ltos: push_l(); break; | |
385 case ftos: push_f(); break; | |
386 case dtos: push_d(); break; | |
387 case vtos: /* nothing to do */ break; | |
388 default : ShouldNotReachHere(); | |
389 } | |
390 } | |
391 | |
392 | |
1506 | 393 // Helpers for swap and dup |
394 void InterpreterMacroAssembler::load_ptr(int n, Register val) { | |
304 | 395 movptr(val, Address(rsp, Interpreter::expr_offset_in_bytes(n))); |
0 | 396 } |
397 | |
1506 | 398 void InterpreterMacroAssembler::store_ptr(int n, Register val) { |
399 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(n)), val); | |
0 | 400 } |
401 | |
402 | |
710 | 403 void InterpreterMacroAssembler::prepare_to_jump_from_interpreted() { |
0 | 404 // set sender sp |
304 | 405 lea(r13, Address(rsp, wordSize)); |
0 | 406 // record last_sp |
304 | 407 movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), r13); |
710 | 408 } |
409 | |
410 | |
411 // Jump to from_interpreted entry of a call unless single stepping is possible | |
412 // in this thread in which case we must call the i2i entry | |
413 void InterpreterMacroAssembler::jump_from_interpreted(Register method, Register temp) { | |
414 prepare_to_jump_from_interpreted(); | |
0 | 415 |
416 if (JvmtiExport::can_post_interpreter_events()) { | |
417 Label run_compiled_code; | |
418 // JVMTI events, such as single-stepping, are implemented partly by avoiding running | |
419 // compiled code in threads for which the event is enabled. Check here for | |
420 // interp_only_mode if these events CAN be enabled. | |
421 // interp_only is an int, on little endian it is sufficient to test the byte only | |
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422 // Is a cmpl faster? |
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423 cmpb(Address(r15_thread, JavaThread::interp_only_mode_offset()), 0); |
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424 jccb(Assembler::zero, run_compiled_code); |
0 | 425 jmp(Address(method, methodOopDesc::interpreter_entry_offset())); |
426 bind(run_compiled_code); | |
427 } | |
428 | |
429 jmp(Address(method, methodOopDesc::from_interpreted_offset())); | |
430 | |
431 } | |
432 | |
433 | |
434 // The following two routines provide a hook so that an implementation | |
435 // can schedule the dispatch in two parts. amd64 does not do this. | |
436 void InterpreterMacroAssembler::dispatch_prolog(TosState state, int step) { | |
437 // Nothing amd64 specific to be done here | |
438 } | |
439 | |
440 void InterpreterMacroAssembler::dispatch_epilog(TosState state, int step) { | |
441 dispatch_next(state, step); | |
442 } | |
443 | |
444 void InterpreterMacroAssembler::dispatch_base(TosState state, | |
445 address* table, | |
446 bool verifyoop) { | |
447 verify_FPU(1, state); | |
448 if (VerifyActivationFrameSize) { | |
449 Label L; | |
304 | 450 mov(rcx, rbp); |
451 subptr(rcx, rsp); | |
452 int32_t min_frame_size = | |
0 | 453 (frame::link_offset - frame::interpreter_frame_initial_sp_offset) * |
454 wordSize; | |
304 | 455 cmpptr(rcx, (int32_t)min_frame_size); |
0 | 456 jcc(Assembler::greaterEqual, L); |
457 stop("broken stack frame"); | |
458 bind(L); | |
459 } | |
460 if (verifyoop) { | |
461 verify_oop(rax, state); | |
462 } | |
463 lea(rscratch1, ExternalAddress((address)table)); | |
464 jmp(Address(rscratch1, rbx, Address::times_8)); | |
465 } | |
466 | |
467 void InterpreterMacroAssembler::dispatch_only(TosState state) { | |
468 dispatch_base(state, Interpreter::dispatch_table(state)); | |
469 } | |
470 | |
471 void InterpreterMacroAssembler::dispatch_only_normal(TosState state) { | |
472 dispatch_base(state, Interpreter::normal_table(state)); | |
473 } | |
474 | |
475 void InterpreterMacroAssembler::dispatch_only_noverify(TosState state) { | |
476 dispatch_base(state, Interpreter::normal_table(state), false); | |
477 } | |
478 | |
479 | |
480 void InterpreterMacroAssembler::dispatch_next(TosState state, int step) { | |
481 // load next bytecode (load before advancing r13 to prevent AGI) | |
482 load_unsigned_byte(rbx, Address(r13, step)); | |
483 // advance r13 | |
304 | 484 increment(r13, step); |
0 | 485 dispatch_base(state, Interpreter::dispatch_table(state)); |
486 } | |
487 | |
488 void InterpreterMacroAssembler::dispatch_via(TosState state, address* table) { | |
489 // load current bytecode | |
490 load_unsigned_byte(rbx, Address(r13, 0)); | |
491 dispatch_base(state, table); | |
492 } | |
493 | |
494 // remove activation | |
495 // | |
496 // Unlock the receiver if this is a synchronized method. | |
497 // Unlock any Java monitors from syncronized blocks. | |
498 // Remove the activation from the stack. | |
499 // | |
500 // If there are locked Java monitors | |
501 // If throw_monitor_exception | |
502 // throws IllegalMonitorStateException | |
503 // Else if install_monitor_exception | |
504 // installs IllegalMonitorStateException | |
505 // Else | |
506 // no error processing | |
507 void InterpreterMacroAssembler::remove_activation( | |
508 TosState state, | |
509 Register ret_addr, | |
510 bool throw_monitor_exception, | |
511 bool install_monitor_exception, | |
512 bool notify_jvmdi) { | |
513 // Note: Registers rdx xmm0 may be in use for the | |
514 // result check if synchronized method | |
515 Label unlocked, unlock, no_unlock; | |
516 | |
517 // get the value of _do_not_unlock_if_synchronized into rdx | |
518 const Address do_not_unlock_if_synchronized(r15_thread, | |
519 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset())); | |
520 movbool(rdx, do_not_unlock_if_synchronized); | |
521 movbool(do_not_unlock_if_synchronized, false); // reset the flag | |
522 | |
523 // get method access flags | |
304 | 524 movptr(rbx, Address(rbp, frame::interpreter_frame_method_offset * wordSize)); |
0 | 525 movl(rcx, Address(rbx, methodOopDesc::access_flags_offset())); |
526 testl(rcx, JVM_ACC_SYNCHRONIZED); | |
527 jcc(Assembler::zero, unlocked); | |
528 | |
529 // Don't unlock anything if the _do_not_unlock_if_synchronized flag | |
530 // is set. | |
531 testbool(rdx); | |
532 jcc(Assembler::notZero, no_unlock); | |
533 | |
534 // unlock monitor | |
535 push(state); // save result | |
536 | |
537 // BasicObjectLock will be first in list, since this is a | |
538 // synchronized method. However, need to check that the object has | |
539 // not been unlocked by an explicit monitorexit bytecode. | |
540 const Address monitor(rbp, frame::interpreter_frame_initial_sp_offset * | |
541 wordSize - (int) sizeof(BasicObjectLock)); | |
542 // We use c_rarg1 so that if we go slow path it will be the correct | |
543 // register for unlock_object to pass to VM directly | |
304 | 544 lea(c_rarg1, monitor); // address of first monitor |
0 | 545 |
304 | 546 movptr(rax, Address(c_rarg1, BasicObjectLock::obj_offset_in_bytes())); |
547 testptr(rax, rax); | |
0 | 548 jcc(Assembler::notZero, unlock); |
549 | |
550 pop(state); | |
551 if (throw_monitor_exception) { | |
552 // Entry already unlocked, need to throw exception | |
553 call_VM(noreg, CAST_FROM_FN_PTR(address, | |
554 InterpreterRuntime::throw_illegal_monitor_state_exception)); | |
555 should_not_reach_here(); | |
556 } else { | |
557 // Monitor already unlocked during a stack unroll. If requested, | |
558 // install an illegal_monitor_state_exception. Continue with | |
559 // stack unrolling. | |
560 if (install_monitor_exception) { | |
561 call_VM(noreg, CAST_FROM_FN_PTR(address, | |
562 InterpreterRuntime::new_illegal_monitor_state_exception)); | |
563 } | |
564 jmp(unlocked); | |
565 } | |
566 | |
567 bind(unlock); | |
568 unlock_object(c_rarg1); | |
569 pop(state); | |
570 | |
571 // Check that for block-structured locking (i.e., that all locked | |
572 // objects has been unlocked) | |
573 bind(unlocked); | |
574 | |
575 // rax: Might contain return value | |
576 | |
577 // Check that all monitors are unlocked | |
578 { | |
579 Label loop, exception, entry, restart; | |
580 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize; | |
581 const Address monitor_block_top( | |
582 rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize); | |
583 const Address monitor_block_bot( | |
584 rbp, frame::interpreter_frame_initial_sp_offset * wordSize); | |
585 | |
586 bind(restart); | |
587 // We use c_rarg1 so that if we go slow path it will be the correct | |
588 // register for unlock_object to pass to VM directly | |
304 | 589 movptr(c_rarg1, monitor_block_top); // points to current entry, starting |
0 | 590 // with top-most entry |
304 | 591 lea(rbx, monitor_block_bot); // points to word before bottom of |
0 | 592 // monitor block |
593 jmp(entry); | |
594 | |
595 // Entry already locked, need to throw exception | |
596 bind(exception); | |
597 | |
598 if (throw_monitor_exception) { | |
599 // Throw exception | |
600 MacroAssembler::call_VM(noreg, | |
601 CAST_FROM_FN_PTR(address, InterpreterRuntime:: | |
602 throw_illegal_monitor_state_exception)); | |
603 should_not_reach_here(); | |
604 } else { | |
605 // Stack unrolling. Unlock object and install illegal_monitor_exception. | |
606 // Unlock does not block, so don't have to worry about the frame. | |
607 // We don't have to preserve c_rarg1 since we are going to throw an exception. | |
608 | |
609 push(state); | |
610 unlock_object(c_rarg1); | |
611 pop(state); | |
612 | |
613 if (install_monitor_exception) { | |
614 call_VM(noreg, CAST_FROM_FN_PTR(address, | |
615 InterpreterRuntime:: | |
616 new_illegal_monitor_state_exception)); | |
617 } | |
618 | |
619 jmp(restart); | |
620 } | |
621 | |
622 bind(loop); | |
623 // check if current entry is used | |
304 | 624 cmpptr(Address(c_rarg1, BasicObjectLock::obj_offset_in_bytes()), (int32_t) NULL); |
0 | 625 jcc(Assembler::notEqual, exception); |
626 | |
304 | 627 addptr(c_rarg1, entry_size); // otherwise advance to next entry |
0 | 628 bind(entry); |
304 | 629 cmpptr(c_rarg1, rbx); // check if bottom reached |
0 | 630 jcc(Assembler::notEqual, loop); // if not at bottom then check this entry |
631 } | |
632 | |
633 bind(no_unlock); | |
634 | |
635 // jvmti support | |
636 if (notify_jvmdi) { | |
637 notify_method_exit(state, NotifyJVMTI); // preserve TOSCA | |
638 } else { | |
639 notify_method_exit(state, SkipNotifyJVMTI); // preserve TOSCA | |
640 } | |
641 | |
642 // remove activation | |
643 // get sender sp | |
304 | 644 movptr(rbx, |
645 Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize)); | |
0 | 646 leave(); // remove frame anchor |
304 | 647 pop(ret_addr); // get return address |
648 mov(rsp, rbx); // set sp to sender sp | |
0 | 649 } |
650 | |
304 | 651 #endif // C_INTERP |
652 | |
0 | 653 // Lock object |
654 // | |
655 // Args: | |
656 // c_rarg1: BasicObjectLock to be used for locking | |
657 // | |
658 // Kills: | |
659 // rax | |
660 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, .. (param regs) | |
661 // rscratch1, rscratch2 (scratch regs) | |
662 void InterpreterMacroAssembler::lock_object(Register lock_reg) { | |
663 assert(lock_reg == c_rarg1, "The argument is only for looks. It must be c_rarg1"); | |
664 | |
665 if (UseHeavyMonitors) { | |
666 call_VM(noreg, | |
667 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), | |
668 lock_reg); | |
669 } else { | |
670 Label done; | |
671 | |
672 const Register swap_reg = rax; // Must use rax for cmpxchg instruction | |
673 const Register obj_reg = c_rarg3; // Will contain the oop | |
674 | |
675 const int obj_offset = BasicObjectLock::obj_offset_in_bytes(); | |
676 const int lock_offset = BasicObjectLock::lock_offset_in_bytes (); | |
677 const int mark_offset = lock_offset + | |
678 BasicLock::displaced_header_offset_in_bytes(); | |
679 | |
680 Label slow_case; | |
681 | |
682 // Load object pointer into obj_reg %c_rarg3 | |
304 | 683 movptr(obj_reg, Address(lock_reg, obj_offset)); |
0 | 684 |
685 if (UseBiasedLocking) { | |
686 biased_locking_enter(lock_reg, obj_reg, swap_reg, rscratch1, false, done, &slow_case); | |
687 } | |
688 | |
689 // Load immediate 1 into swap_reg %rax | |
690 movl(swap_reg, 1); | |
691 | |
692 // Load (object->mark() | 1) into swap_reg %rax | |
304 | 693 orptr(swap_reg, Address(obj_reg, 0)); |
0 | 694 |
695 // Save (object->mark() | 1) into BasicLock's displaced header | |
304 | 696 movptr(Address(lock_reg, mark_offset), swap_reg); |
0 | 697 |
698 assert(lock_offset == 0, | |
699 "displached header must be first word in BasicObjectLock"); | |
700 | |
701 if (os::is_MP()) lock(); | |
304 | 702 cmpxchgptr(lock_reg, Address(obj_reg, 0)); |
0 | 703 if (PrintBiasedLockingStatistics) { |
704 cond_inc32(Assembler::zero, | |
705 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr())); | |
706 } | |
707 jcc(Assembler::zero, done); | |
708 | |
709 // Test if the oopMark is an obvious stack pointer, i.e., | |
710 // 1) (mark & 7) == 0, and | |
711 // 2) rsp <= mark < mark + os::pagesize() | |
712 // | |
713 // These 3 tests can be done by evaluating the following | |
714 // expression: ((mark - rsp) & (7 - os::vm_page_size())), | |
715 // assuming both stack pointer and pagesize have their | |
716 // least significant 3 bits clear. | |
717 // NOTE: the oopMark is in swap_reg %rax as the result of cmpxchg | |
304 | 718 subptr(swap_reg, rsp); |
719 andptr(swap_reg, 7 - os::vm_page_size()); | |
0 | 720 |
721 // Save the test result, for recursive case, the result is zero | |
304 | 722 movptr(Address(lock_reg, mark_offset), swap_reg); |
0 | 723 |
724 if (PrintBiasedLockingStatistics) { | |
725 cond_inc32(Assembler::zero, | |
726 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr())); | |
727 } | |
728 jcc(Assembler::zero, done); | |
729 | |
730 bind(slow_case); | |
731 | |
732 // Call the runtime routine for slow case | |
733 call_VM(noreg, | |
734 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), | |
735 lock_reg); | |
736 | |
737 bind(done); | |
738 } | |
739 } | |
740 | |
741 | |
742 // Unlocks an object. Used in monitorexit bytecode and | |
743 // remove_activation. Throws an IllegalMonitorException if object is | |
744 // not locked by current thread. | |
745 // | |
746 // Args: | |
747 // c_rarg1: BasicObjectLock for lock | |
748 // | |
749 // Kills: | |
750 // rax | |
751 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, ... (param regs) | |
752 // rscratch1, rscratch2 (scratch regs) | |
753 void InterpreterMacroAssembler::unlock_object(Register lock_reg) { | |
754 assert(lock_reg == c_rarg1, "The argument is only for looks. It must be rarg1"); | |
755 | |
756 if (UseHeavyMonitors) { | |
757 call_VM(noreg, | |
758 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), | |
759 lock_reg); | |
760 } else { | |
761 Label done; | |
762 | |
763 const Register swap_reg = rax; // Must use rax for cmpxchg instruction | |
764 const Register header_reg = c_rarg2; // Will contain the old oopMark | |
765 const Register obj_reg = c_rarg3; // Will contain the oop | |
766 | |
767 save_bcp(); // Save in case of exception | |
768 | |
769 // Convert from BasicObjectLock structure to object and BasicLock | |
770 // structure Store the BasicLock address into %rax | |
304 | 771 lea(swap_reg, Address(lock_reg, BasicObjectLock::lock_offset_in_bytes())); |
0 | 772 |
773 // Load oop into obj_reg(%c_rarg3) | |
304 | 774 movptr(obj_reg, Address(lock_reg, BasicObjectLock::obj_offset_in_bytes())); |
0 | 775 |
776 // Free entry | |
304 | 777 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), (int32_t)NULL_WORD); |
0 | 778 |
779 if (UseBiasedLocking) { | |
780 biased_locking_exit(obj_reg, header_reg, done); | |
781 } | |
782 | |
783 // Load the old header from BasicLock structure | |
304 | 784 movptr(header_reg, Address(swap_reg, |
785 BasicLock::displaced_header_offset_in_bytes())); | |
0 | 786 |
787 // Test for recursion | |
304 | 788 testptr(header_reg, header_reg); |
0 | 789 |
790 // zero for recursive case | |
791 jcc(Assembler::zero, done); | |
792 | |
793 // Atomic swap back the old header | |
794 if (os::is_MP()) lock(); | |
304 | 795 cmpxchgptr(header_reg, Address(obj_reg, 0)); |
0 | 796 |
797 // zero for recursive case | |
798 jcc(Assembler::zero, done); | |
799 | |
800 // Call the runtime routine for slow case. | |
304 | 801 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), |
0 | 802 obj_reg); // restore obj |
803 call_VM(noreg, | |
804 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), | |
805 lock_reg); | |
806 | |
807 bind(done); | |
808 | |
809 restore_bcp(); | |
810 } | |
811 } | |
812 | |
304 | 813 #ifndef CC_INTERP |
0 | 814 |
815 void InterpreterMacroAssembler::test_method_data_pointer(Register mdp, | |
816 Label& zero_continue) { | |
817 assert(ProfileInterpreter, "must be profiling interpreter"); | |
304 | 818 movptr(mdp, Address(rbp, frame::interpreter_frame_mdx_offset * wordSize)); |
819 testptr(mdp, mdp); | |
0 | 820 jcc(Assembler::zero, zero_continue); |
821 } | |
822 | |
823 | |
824 // Set the method data pointer for the current bcp. | |
825 void InterpreterMacroAssembler::set_method_data_pointer_for_bcp() { | |
826 assert(ProfileInterpreter, "must be profiling interpreter"); | |
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827 Label set_mdp; |
304 | 828 push(rax); |
829 push(rbx); | |
0 | 830 |
831 get_method(rbx); | |
832 // Test MDO to avoid the call if it is NULL. | |
304 | 833 movptr(rax, Address(rbx, in_bytes(methodOopDesc::method_data_offset()))); |
834 testptr(rax, rax); | |
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835 jcc(Assembler::zero, set_mdp); |
0 | 836 // rbx: method |
837 // r13: bcp | |
838 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::bcp_to_di), rbx, r13); | |
839 // rax: mdi | |
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840 // mdo is guaranteed to be non-zero here, we checked for it before the call. |
304 | 841 movptr(rbx, Address(rbx, in_bytes(methodOopDesc::method_data_offset()))); |
842 addptr(rbx, in_bytes(methodDataOopDesc::data_offset())); | |
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843 addptr(rax, rbx); |
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844 bind(set_mdp); |
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845 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), rax); |
304 | 846 pop(rbx); |
847 pop(rax); | |
0 | 848 } |
849 | |
850 void InterpreterMacroAssembler::verify_method_data_pointer() { | |
851 assert(ProfileInterpreter, "must be profiling interpreter"); | |
852 #ifdef ASSERT | |
853 Label verify_continue; | |
304 | 854 push(rax); |
855 push(rbx); | |
856 push(c_rarg3); | |
857 push(c_rarg2); | |
0 | 858 test_method_data_pointer(c_rarg3, verify_continue); // If mdp is zero, continue |
859 get_method(rbx); | |
860 | |
861 // If the mdp is valid, it will point to a DataLayout header which is | |
862 // consistent with the bcp. The converse is highly probable also. | |
622
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863 load_unsigned_short(c_rarg2, |
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864 Address(c_rarg3, in_bytes(DataLayout::bci_offset()))); |
304 | 865 addptr(c_rarg2, Address(rbx, methodOopDesc::const_offset())); |
866 lea(c_rarg2, Address(c_rarg2, constMethodOopDesc::codes_offset())); | |
867 cmpptr(c_rarg2, r13); | |
0 | 868 jcc(Assembler::equal, verify_continue); |
869 // rbx: method | |
870 // r13: bcp | |
871 // c_rarg3: mdp | |
872 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::verify_mdp), | |
873 rbx, r13, c_rarg3); | |
874 bind(verify_continue); | |
304 | 875 pop(c_rarg2); |
876 pop(c_rarg3); | |
877 pop(rbx); | |
878 pop(rax); | |
0 | 879 #endif // ASSERT |
880 } | |
881 | |
882 | |
883 void InterpreterMacroAssembler::set_mdp_data_at(Register mdp_in, | |
884 int constant, | |
885 Register value) { | |
886 assert(ProfileInterpreter, "must be profiling interpreter"); | |
887 Address data(mdp_in, constant); | |
304 | 888 movptr(data, value); |
0 | 889 } |
890 | |
891 | |
892 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in, | |
893 int constant, | |
894 bool decrement) { | |
895 // Counter address | |
896 Address data(mdp_in, constant); | |
897 | |
898 increment_mdp_data_at(data, decrement); | |
899 } | |
900 | |
901 void InterpreterMacroAssembler::increment_mdp_data_at(Address data, | |
902 bool decrement) { | |
903 assert(ProfileInterpreter, "must be profiling interpreter"); | |
304 | 904 // %%% this does 64bit counters at best it is wasting space |
905 // at worst it is a rare bug when counters overflow | |
0 | 906 |
907 if (decrement) { | |
908 // Decrement the register. Set condition codes. | |
304 | 909 addptr(data, (int32_t) -DataLayout::counter_increment); |
0 | 910 // If the decrement causes the counter to overflow, stay negative |
911 Label L; | |
912 jcc(Assembler::negative, L); | |
304 | 913 addptr(data, (int32_t) DataLayout::counter_increment); |
0 | 914 bind(L); |
915 } else { | |
916 assert(DataLayout::counter_increment == 1, | |
917 "flow-free idiom only works with 1"); | |
918 // Increment the register. Set carry flag. | |
304 | 919 addptr(data, DataLayout::counter_increment); |
0 | 920 // If the increment causes the counter to overflow, pull back by 1. |
304 | 921 sbbptr(data, (int32_t)0); |
0 | 922 } |
923 } | |
924 | |
925 | |
926 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in, | |
927 Register reg, | |
928 int constant, | |
929 bool decrement) { | |
930 Address data(mdp_in, reg, Address::times_1, constant); | |
931 | |
932 increment_mdp_data_at(data, decrement); | |
933 } | |
934 | |
935 void InterpreterMacroAssembler::set_mdp_flag_at(Register mdp_in, | |
936 int flag_byte_constant) { | |
937 assert(ProfileInterpreter, "must be profiling interpreter"); | |
938 int header_offset = in_bytes(DataLayout::header_offset()); | |
939 int header_bits = DataLayout::flag_mask_to_header_mask(flag_byte_constant); | |
940 // Set the flag | |
941 orl(Address(mdp_in, header_offset), header_bits); | |
942 } | |
943 | |
944 | |
945 | |
946 void InterpreterMacroAssembler::test_mdp_data_at(Register mdp_in, | |
947 int offset, | |
948 Register value, | |
949 Register test_value_out, | |
950 Label& not_equal_continue) { | |
951 assert(ProfileInterpreter, "must be profiling interpreter"); | |
952 if (test_value_out == noreg) { | |
304 | 953 cmpptr(value, Address(mdp_in, offset)); |
0 | 954 } else { |
955 // Put the test value into a register, so caller can use it: | |
304 | 956 movptr(test_value_out, Address(mdp_in, offset)); |
957 cmpptr(test_value_out, value); | |
0 | 958 } |
959 jcc(Assembler::notEqual, not_equal_continue); | |
960 } | |
961 | |
962 | |
963 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in, | |
964 int offset_of_disp) { | |
965 assert(ProfileInterpreter, "must be profiling interpreter"); | |
966 Address disp_address(mdp_in, offset_of_disp); | |
304 | 967 addptr(mdp_in, disp_address); |
968 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in); | |
0 | 969 } |
970 | |
971 | |
972 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in, | |
973 Register reg, | |
974 int offset_of_disp) { | |
975 assert(ProfileInterpreter, "must be profiling interpreter"); | |
976 Address disp_address(mdp_in, reg, Address::times_1, offset_of_disp); | |
304 | 977 addptr(mdp_in, disp_address); |
978 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in); | |
0 | 979 } |
980 | |
981 | |
982 void InterpreterMacroAssembler::update_mdp_by_constant(Register mdp_in, | |
983 int constant) { | |
984 assert(ProfileInterpreter, "must be profiling interpreter"); | |
304 | 985 addptr(mdp_in, constant); |
986 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in); | |
0 | 987 } |
988 | |
989 | |
990 void InterpreterMacroAssembler::update_mdp_for_ret(Register return_bci) { | |
991 assert(ProfileInterpreter, "must be profiling interpreter"); | |
304 | 992 push(return_bci); // save/restore across call_VM |
0 | 993 call_VM(noreg, |
994 CAST_FROM_FN_PTR(address, InterpreterRuntime::update_mdp_for_ret), | |
995 return_bci); | |
304 | 996 pop(return_bci); |
0 | 997 } |
998 | |
999 | |
1000 void InterpreterMacroAssembler::profile_taken_branch(Register mdp, | |
1001 Register bumped_count) { | |
1002 if (ProfileInterpreter) { | |
1003 Label profile_continue; | |
1004 | |
1005 // If no method data exists, go to profile_continue. | |
1006 // Otherwise, assign to mdp | |
1007 test_method_data_pointer(mdp, profile_continue); | |
1008 | |
1009 // We are taking a branch. Increment the taken count. | |
1010 // We inline increment_mdp_data_at to return bumped_count in a register | |
1011 //increment_mdp_data_at(mdp, in_bytes(JumpData::taken_offset())); | |
1012 Address data(mdp, in_bytes(JumpData::taken_offset())); | |
304 | 1013 movptr(bumped_count, data); |
0 | 1014 assert(DataLayout::counter_increment == 1, |
1015 "flow-free idiom only works with 1"); | |
304 | 1016 addptr(bumped_count, DataLayout::counter_increment); |
1017 sbbptr(bumped_count, 0); | |
1018 movptr(data, bumped_count); // Store back out | |
0 | 1019 |
1020 // The method data pointer needs to be updated to reflect the new target. | |
1021 update_mdp_by_offset(mdp, in_bytes(JumpData::displacement_offset())); | |
1022 bind(profile_continue); | |
1023 } | |
1024 } | |
1025 | |
1026 | |
1027 void InterpreterMacroAssembler::profile_not_taken_branch(Register mdp) { | |
1028 if (ProfileInterpreter) { | |
1029 Label profile_continue; | |
1030 | |
1031 // If no method data exists, go to profile_continue. | |
1032 test_method_data_pointer(mdp, profile_continue); | |
1033 | |
1034 // We are taking a branch. Increment the not taken count. | |
1035 increment_mdp_data_at(mdp, in_bytes(BranchData::not_taken_offset())); | |
1036 | |
1037 // The method data pointer needs to be updated to correspond to | |
1038 // the next bytecode | |
1039 update_mdp_by_constant(mdp, in_bytes(BranchData::branch_data_size())); | |
1040 bind(profile_continue); | |
1041 } | |
1042 } | |
1043 | |
1044 | |
1045 void InterpreterMacroAssembler::profile_call(Register mdp) { | |
1046 if (ProfileInterpreter) { | |
1047 Label profile_continue; | |
1048 | |
1049 // If no method data exists, go to profile_continue. | |
1050 test_method_data_pointer(mdp, profile_continue); | |
1051 | |
1052 // We are making a call. Increment the count. | |
1053 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); | |
1054 | |
1055 // The method data pointer needs to be updated to reflect the new target. | |
1056 update_mdp_by_constant(mdp, in_bytes(CounterData::counter_data_size())); | |
1057 bind(profile_continue); | |
1058 } | |
1059 } | |
1060 | |
1061 | |
1062 void InterpreterMacroAssembler::profile_final_call(Register mdp) { | |
1063 if (ProfileInterpreter) { | |
1064 Label profile_continue; | |
1065 | |
1066 // If no method data exists, go to profile_continue. | |
1067 test_method_data_pointer(mdp, profile_continue); | |
1068 | |
1069 // We are making a call. Increment the count. | |
1070 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); | |
1071 | |
1072 // The method data pointer needs to be updated to reflect the new target. | |
1073 update_mdp_by_constant(mdp, | |
1074 in_bytes(VirtualCallData:: | |
1075 virtual_call_data_size())); | |
1076 bind(profile_continue); | |
1077 } | |
1078 } | |
1079 | |
1080 | |
1081 void InterpreterMacroAssembler::profile_virtual_call(Register receiver, | |
1082 Register mdp, | |
1108 | 1083 Register reg2, |
1084 bool receiver_can_be_null) { | |
0 | 1085 if (ProfileInterpreter) { |
1086 Label profile_continue; | |
1087 | |
1088 // If no method data exists, go to profile_continue. | |
1089 test_method_data_pointer(mdp, profile_continue); | |
1090 | |
1108 | 1091 Label skip_receiver_profile; |
1092 if (receiver_can_be_null) { | |
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1093 Label not_null; |
1108 | 1094 testptr(receiver, receiver); |
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1095 jccb(Assembler::notZero, not_null); |
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1096 // We are making a call. Increment the count for null receiver. |
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1097 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); |
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1098 jmp(skip_receiver_profile); |
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1099 bind(not_null); |
1108 | 1100 } |
1101 | |
0 | 1102 // Record the receiver type. |
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1103 record_klass_in_profile(receiver, mdp, reg2, true); |
1108 | 1104 bind(skip_receiver_profile); |
0 | 1105 |
1106 // The method data pointer needs to be updated to reflect the new target. | |
1107 update_mdp_by_constant(mdp, | |
1108 in_bytes(VirtualCallData:: | |
1109 virtual_call_data_size())); | |
1110 bind(profile_continue); | |
1111 } | |
1112 } | |
1113 | |
1114 // This routine creates a state machine for updating the multi-row | |
1115 // type profile at a virtual call site (or other type-sensitive bytecode). | |
1116 // The machine visits each row (of receiver/count) until the receiver type | |
1117 // is found, or until it runs out of rows. At the same time, it remembers | |
1118 // the location of the first empty row. (An empty row records null for its | |
1119 // receiver, and can be allocated for a newly-observed receiver type.) | |
1120 // Because there are two degrees of freedom in the state, a simple linear | |
1121 // search will not work; it must be a decision tree. Hence this helper | |
1122 // function is recursive, to generate the required tree structured code. | |
1123 // It's the interpreter, so we are trading off code space for speed. | |
1124 // See below for example code. | |
1125 void InterpreterMacroAssembler::record_klass_in_profile_helper( | |
1126 Register receiver, Register mdp, | |
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1127 Register reg2, int start_row, |
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1128 Label& done, bool is_virtual_call) { |
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1129 if (TypeProfileWidth == 0) { |
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1130 if (is_virtual_call) { |
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1131 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); |
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1132 } |
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1133 return; |
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1134 } |
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1135 |
0 | 1136 int last_row = VirtualCallData::row_limit() - 1; |
1137 assert(start_row <= last_row, "must be work left to do"); | |
1138 // Test this row for both the receiver and for null. | |
1139 // Take any of three different outcomes: | |
1140 // 1. found receiver => increment count and goto done | |
1141 // 2. found null => keep looking for case 1, maybe allocate this cell | |
1142 // 3. found something else => keep looking for cases 1 and 2 | |
1143 // Case 3 is handled by a recursive call. | |
1144 for (int row = start_row; row <= last_row; row++) { | |
1145 Label next_test; | |
1146 bool test_for_null_also = (row == start_row); | |
1147 | |
1148 // See if the receiver is receiver[n]. | |
1149 int recvr_offset = in_bytes(VirtualCallData::receiver_offset(row)); | |
1150 test_mdp_data_at(mdp, recvr_offset, receiver, | |
1151 (test_for_null_also ? reg2 : noreg), | |
1152 next_test); | |
1153 // (Reg2 now contains the receiver from the CallData.) | |
1154 | |
1155 // The receiver is receiver[n]. Increment count[n]. | |
1156 int count_offset = in_bytes(VirtualCallData::receiver_count_offset(row)); | |
1157 increment_mdp_data_at(mdp, count_offset); | |
1158 jmp(done); | |
1159 bind(next_test); | |
1160 | |
1161 if (test_for_null_also) { | |
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1162 Label found_null; |
0 | 1163 // Failed the equality check on receiver[n]... Test for null. |
304 | 1164 testptr(reg2, reg2); |
0 | 1165 if (start_row == last_row) { |
1166 // The only thing left to do is handle the null case. | |
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1167 if (is_virtual_call) { |
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1168 jccb(Assembler::zero, found_null); |
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1169 // Receiver did not match any saved receiver and there is no empty row for it. |
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1170 // Increment total counter to indicate polymorphic case. |
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1171 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); |
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1172 jmp(done); |
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1173 bind(found_null); |
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1174 } else { |
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1175 jcc(Assembler::notZero, done); |
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1176 } |
0 | 1177 break; |
1178 } | |
1179 // Since null is rare, make it be the branch-taken case. | |
1180 jcc(Assembler::zero, found_null); | |
1181 | |
1182 // Put all the "Case 3" tests here. | |
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1183 record_klass_in_profile_helper(receiver, mdp, reg2, start_row + 1, done, is_virtual_call); |
0 | 1184 |
1185 // Found a null. Keep searching for a matching receiver, | |
1186 // but remember that this is an empty (unused) slot. | |
1187 bind(found_null); | |
1188 } | |
1189 } | |
1190 | |
1191 // In the fall-through case, we found no matching receiver, but we | |
1192 // observed the receiver[start_row] is NULL. | |
1193 | |
1194 // Fill in the receiver field and increment the count. | |
1195 int recvr_offset = in_bytes(VirtualCallData::receiver_offset(start_row)); | |
1196 set_mdp_data_at(mdp, recvr_offset, receiver); | |
1197 int count_offset = in_bytes(VirtualCallData::receiver_count_offset(start_row)); | |
1198 movl(reg2, DataLayout::counter_increment); | |
1199 set_mdp_data_at(mdp, count_offset, reg2); | |
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1200 if (start_row > 0) { |
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1201 jmp(done); |
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1202 } |
0 | 1203 } |
1204 | |
1205 // Example state machine code for three profile rows: | |
1206 // // main copy of decision tree, rooted at row[1] | |
1207 // if (row[0].rec == rec) { row[0].incr(); goto done; } | |
1208 // if (row[0].rec != NULL) { | |
1209 // // inner copy of decision tree, rooted at row[1] | |
1210 // if (row[1].rec == rec) { row[1].incr(); goto done; } | |
1211 // if (row[1].rec != NULL) { | |
1212 // // degenerate decision tree, rooted at row[2] | |
1213 // if (row[2].rec == rec) { row[2].incr(); goto done; } | |
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1214 // if (row[2].rec != NULL) { count.incr(); goto done; } // overflow |
0 | 1215 // row[2].init(rec); goto done; |
1216 // } else { | |
1217 // // remember row[1] is empty | |
1218 // if (row[2].rec == rec) { row[2].incr(); goto done; } | |
1219 // row[1].init(rec); goto done; | |
1220 // } | |
1221 // } else { | |
1222 // // remember row[0] is empty | |
1223 // if (row[1].rec == rec) { row[1].incr(); goto done; } | |
1224 // if (row[2].rec == rec) { row[2].incr(); goto done; } | |
1225 // row[0].init(rec); goto done; | |
1226 // } | |
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1227 // done: |
0 | 1228 |
1229 void InterpreterMacroAssembler::record_klass_in_profile(Register receiver, | |
1206
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1230 Register mdp, Register reg2, |
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1231 bool is_virtual_call) { |
0 | 1232 assert(ProfileInterpreter, "must be profiling"); |
1233 Label done; | |
1234 | |
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1235 record_klass_in_profile_helper(receiver, mdp, reg2, 0, done, is_virtual_call); |
0 | 1236 |
1237 bind (done); | |
1238 } | |
1239 | |
1240 void InterpreterMacroAssembler::profile_ret(Register return_bci, | |
1241 Register mdp) { | |
1242 if (ProfileInterpreter) { | |
1243 Label profile_continue; | |
1244 uint row; | |
1245 | |
1246 // If no method data exists, go to profile_continue. | |
1247 test_method_data_pointer(mdp, profile_continue); | |
1248 | |
1249 // Update the total ret count. | |
1250 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); | |
1251 | |
1252 for (row = 0; row < RetData::row_limit(); row++) { | |
1253 Label next_test; | |
1254 | |
1255 // See if return_bci is equal to bci[n]: | |
1256 test_mdp_data_at(mdp, | |
1257 in_bytes(RetData::bci_offset(row)), | |
1258 return_bci, noreg, | |
1259 next_test); | |
1260 | |
1261 // return_bci is equal to bci[n]. Increment the count. | |
1262 increment_mdp_data_at(mdp, in_bytes(RetData::bci_count_offset(row))); | |
1263 | |
1264 // The method data pointer needs to be updated to reflect the new target. | |
1265 update_mdp_by_offset(mdp, | |
1266 in_bytes(RetData::bci_displacement_offset(row))); | |
1267 jmp(profile_continue); | |
1268 bind(next_test); | |
1269 } | |
1270 | |
1271 update_mdp_for_ret(return_bci); | |
1272 | |
1273 bind(profile_continue); | |
1274 } | |
1275 } | |
1276 | |
1277 | |
1278 void InterpreterMacroAssembler::profile_null_seen(Register mdp) { | |
1279 if (ProfileInterpreter) { | |
1280 Label profile_continue; | |
1281 | |
1282 // If no method data exists, go to profile_continue. | |
1283 test_method_data_pointer(mdp, profile_continue); | |
1284 | |
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1285 set_mdp_flag_at(mdp, BitData::null_seen_byte_constant()); |
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1286 |
0 | 1287 // The method data pointer needs to be updated. |
1288 int mdp_delta = in_bytes(BitData::bit_data_size()); | |
1289 if (TypeProfileCasts) { | |
1290 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size()); | |
1291 } | |
1292 update_mdp_by_constant(mdp, mdp_delta); | |
1293 | |
1294 bind(profile_continue); | |
1295 } | |
1296 } | |
1297 | |
1298 | |
1299 void InterpreterMacroAssembler::profile_typecheck_failed(Register mdp) { | |
1300 if (ProfileInterpreter && TypeProfileCasts) { | |
1301 Label profile_continue; | |
1302 | |
1303 // If no method data exists, go to profile_continue. | |
1304 test_method_data_pointer(mdp, profile_continue); | |
1305 | |
1306 int count_offset = in_bytes(CounterData::count_offset()); | |
1307 // Back up the address, since we have already bumped the mdp. | |
1308 count_offset -= in_bytes(VirtualCallData::virtual_call_data_size()); | |
1309 | |
1310 // *Decrement* the counter. We expect to see zero or small negatives. | |
1311 increment_mdp_data_at(mdp, count_offset, true); | |
1312 | |
1313 bind (profile_continue); | |
1314 } | |
1315 } | |
1316 | |
1317 | |
1318 void InterpreterMacroAssembler::profile_typecheck(Register mdp, Register klass, Register reg2) { | |
1319 if (ProfileInterpreter) { | |
1320 Label profile_continue; | |
1321 | |
1322 // If no method data exists, go to profile_continue. | |
1323 test_method_data_pointer(mdp, profile_continue); | |
1324 | |
1325 // The method data pointer needs to be updated. | |
1326 int mdp_delta = in_bytes(BitData::bit_data_size()); | |
1327 if (TypeProfileCasts) { | |
1328 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size()); | |
1329 | |
1330 // Record the object type. | |
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1331 record_klass_in_profile(klass, mdp, reg2, false); |
0 | 1332 } |
1333 update_mdp_by_constant(mdp, mdp_delta); | |
1334 | |
1335 bind(profile_continue); | |
1336 } | |
1337 } | |
1338 | |
1339 | |
1340 void InterpreterMacroAssembler::profile_switch_default(Register mdp) { | |
1341 if (ProfileInterpreter) { | |
1342 Label profile_continue; | |
1343 | |
1344 // If no method data exists, go to profile_continue. | |
1345 test_method_data_pointer(mdp, profile_continue); | |
1346 | |
1347 // Update the default case count | |
1348 increment_mdp_data_at(mdp, | |
1349 in_bytes(MultiBranchData::default_count_offset())); | |
1350 | |
1351 // The method data pointer needs to be updated. | |
1352 update_mdp_by_offset(mdp, | |
1353 in_bytes(MultiBranchData:: | |
1354 default_displacement_offset())); | |
1355 | |
1356 bind(profile_continue); | |
1357 } | |
1358 } | |
1359 | |
1360 | |
1361 void InterpreterMacroAssembler::profile_switch_case(Register index, | |
1362 Register mdp, | |
1363 Register reg2) { | |
1364 if (ProfileInterpreter) { | |
1365 Label profile_continue; | |
1366 | |
1367 // If no method data exists, go to profile_continue. | |
1368 test_method_data_pointer(mdp, profile_continue); | |
1369 | |
1370 // Build the base (index * per_case_size_in_bytes()) + | |
1371 // case_array_offset_in_bytes() | |
1372 movl(reg2, in_bytes(MultiBranchData::per_case_size())); | |
304 | 1373 imulptr(index, reg2); // XXX l ? |
1374 addptr(index, in_bytes(MultiBranchData::case_array_offset())); // XXX l ? | |
0 | 1375 |
1376 // Update the case count | |
1377 increment_mdp_data_at(mdp, | |
1378 index, | |
1379 in_bytes(MultiBranchData::relative_count_offset())); | |
1380 | |
1381 // The method data pointer needs to be updated. | |
1382 update_mdp_by_offset(mdp, | |
1383 index, | |
1384 in_bytes(MultiBranchData:: | |
1385 relative_displacement_offset())); | |
1386 | |
1387 bind(profile_continue); | |
1388 } | |
1389 } | |
1390 | |
1391 | |
304 | 1392 |
0 | 1393 void InterpreterMacroAssembler::verify_oop(Register reg, TosState state) { |
1394 if (state == atos) { | |
1395 MacroAssembler::verify_oop(reg); | |
1396 } | |
1397 } | |
1398 | |
1399 void InterpreterMacroAssembler::verify_FPU(int stack_depth, TosState state) { | |
1400 } | |
304 | 1401 #endif // !CC_INTERP |
0 | 1402 |
1403 | |
1404 void InterpreterMacroAssembler::notify_method_entry() { | |
1405 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to | |
1406 // track stack depth. If it is possible to enter interp_only_mode we add | |
1407 // the code to check if the event should be sent. | |
1408 if (JvmtiExport::can_post_interpreter_events()) { | |
1409 Label L; | |
1410 movl(rdx, Address(r15_thread, JavaThread::interp_only_mode_offset())); | |
1411 testl(rdx, rdx); | |
1412 jcc(Assembler::zero, L); | |
1413 call_VM(noreg, CAST_FROM_FN_PTR(address, | |
1414 InterpreterRuntime::post_method_entry)); | |
1415 bind(L); | |
1416 } | |
1417 | |
1418 { | |
1419 SkipIfEqual skip(this, &DTraceMethodProbes, false); | |
1420 get_method(c_rarg1); | |
1421 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry), | |
1422 r15_thread, c_rarg1); | |
1423 } | |
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1424 |
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1425 // RedefineClasses() tracing support for obsolete method entry |
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1426 if (RC_TRACE_IN_RANGE(0x00001000, 0x00002000)) { |
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1427 get_method(c_rarg1); |
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1428 call_VM_leaf( |
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1429 CAST_FROM_FN_PTR(address, SharedRuntime::rc_trace_method_entry), |
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1430 r15_thread, c_rarg1); |
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1431 } |
0 | 1432 } |
1433 | |
1434 | |
1435 void InterpreterMacroAssembler::notify_method_exit( | |
1436 TosState state, NotifyMethodExitMode mode) { | |
1437 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to | |
1438 // track stack depth. If it is possible to enter interp_only_mode we add | |
1439 // the code to check if the event should be sent. | |
1440 if (mode == NotifyJVMTI && JvmtiExport::can_post_interpreter_events()) { | |
1441 Label L; | |
1442 // Note: frame::interpreter_frame_result has a dependency on how the | |
1443 // method result is saved across the call to post_method_exit. If this | |
1444 // is changed then the interpreter_frame_result implementation will | |
1445 // need to be updated too. | |
304 | 1446 |
1447 // For c++ interpreter the result is always stored at a known location in the frame | |
1448 // template interpreter will leave it on the top of the stack. | |
1449 NOT_CC_INTERP(push(state);) | |
0 | 1450 movl(rdx, Address(r15_thread, JavaThread::interp_only_mode_offset())); |
1451 testl(rdx, rdx); | |
1452 jcc(Assembler::zero, L); | |
1453 call_VM(noreg, | |
1454 CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_exit)); | |
1455 bind(L); | |
304 | 1456 NOT_CC_INTERP(pop(state)); |
0 | 1457 } |
1458 | |
1459 { | |
1460 SkipIfEqual skip(this, &DTraceMethodProbes, false); | |
304 | 1461 NOT_CC_INTERP(push(state)); |
0 | 1462 get_method(c_rarg1); |
1463 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit), | |
1464 r15_thread, c_rarg1); | |
304 | 1465 NOT_CC_INTERP(pop(state)); |
0 | 1466 } |
1467 } | |
1783 | 1468 |
1469 // Jump if ((*counter_addr += increment) & mask) satisfies the condition. | |
1470 void InterpreterMacroAssembler::increment_mask_and_jump(Address counter_addr, | |
1471 int increment, int mask, | |
1472 Register scratch, bool preloaded, | |
1473 Condition cond, Label* where) { | |
1474 if (!preloaded) { | |
1475 movl(scratch, counter_addr); | |
1476 } | |
1477 incrementl(scratch, increment); | |
1478 movl(counter_addr, scratch); | |
1479 andl(scratch, mask); | |
1480 jcc(cond, *where); | |
1481 } |